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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1501.04956 | Michele Levi | Michele Levi, Jan Steinhoff | Spinning gravitating objects in the effective field theory in the
post-Newtonian scheme | 47 pages, 4 figures, published | JHEP 1509 (2015) 219 | 10.1007/JHEP09(2015)219 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a formulation for spinning gravitating objects in the effective
field theory in the post-Newtonian scheme in the context of the binary inspiral
problem. We aim at an effective action, where all field modes below the orbital
scale are integrated out. We spell out the relevant degrees of freedom, in
partic... | [
{
"created": "Tue, 20 Jan 2015 20:54:00 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Aug 2015 08:24:30 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Oct 2015 23:30:43 GMT",
"version": "v3"
}
] | 2015-10-07 | [
[
"Levi",
"Michele",
""
],
[
"Steinhoff",
"Jan",
""
]
] | We introduce a formulation for spinning gravitating objects in the effective field theory in the post-Newtonian scheme in the context of the binary inspiral problem. We aim at an effective action, where all field modes below the orbital scale are integrated out. We spell out the relevant degrees of freedom, in particul... |
2405.15883 | Ghulam Mustafa | Puja Mukherjee, Ujjal Debnath, Himanshu Chaudhary and G. Mustafa | The estimation of parameters of generalized cosmic Chaplygin gas and
viscous modified Chaplygin gas and Accretions around Black Hole in the
background of Einstein-Aether gravity | 20 pages, 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have investigated the phenomenon of accelerated cosmic
expansion in the late universe and the mass accretion process of a
4-dimensional Einstein-Aether black hole. Starting with the basics of
Einstein-Aether gravity theory, we have first considered the field equations
and two eminent models of Chapl... | [
{
"created": "Fri, 24 May 2024 19:02:16 GMT",
"version": "v1"
}
] | 2024-05-28 | [
[
"Mukherjee",
"Puja",
""
],
[
"Debnath",
"Ujjal",
""
],
[
"Chaudhary",
"Himanshu",
""
],
[
"Mustafa",
"G.",
""
]
] | In this paper, we have investigated the phenomenon of accelerated cosmic expansion in the late universe and the mass accretion process of a 4-dimensional Einstein-Aether black hole. Starting with the basics of Einstein-Aether gravity theory, we have first considered the field equations and two eminent models of Chaplyg... |
2308.11049 | Saeed Fakhry | Saeed Fakhry | Primordial Black Hole Merger Rate in $f(R)$ Gravity | 17 pages, 11 figures, references added | The Astrophysical Journal (2024) | 10.3847/1538-4357/ad0e66 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Primordial black holes (PBHs) are known as one of the potential candidates
for dark matter. They are expected to have formed due to the direct
gravitational collapse of density fluctuations in the early Universe.
Therefore, the study of the merger rate of PBHs in modified theories of gravity
can provide more detailed... | [
{
"created": "Mon, 21 Aug 2023 21:20:30 GMT",
"version": "v1"
}
] | 2024-01-11 | [
[
"Fakhry",
"Saeed",
""
]
] | Primordial black holes (PBHs) are known as one of the potential candidates for dark matter. They are expected to have formed due to the direct gravitational collapse of density fluctuations in the early Universe. Therefore, the study of the merger rate of PBHs in modified theories of gravity can provide more detailed i... |
2011.09304 | Muhammad Sharif | M. Sharif and Faisal Javed | Stable Bounded Excursion Gravastars with Regular Black Holes | 29 pages, 19 figures, to appear in ASTR | Astrophys. Space Sci. 366(2021)103 | 10.1007/s10509-021-04010-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper explores the possible existence of stable regions of bounded
excursion gravastars in the background of regular black holes (Bardeen and
Bardeen-de Sitter black holes). For this purpose, we match internal de Sitter
geometry with an external regular black hole through an intermediate shell with
an equation o... | [
{
"created": "Tue, 17 Nov 2020 13:43:33 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Oct 2021 13:42:21 GMT",
"version": "v2"
}
] | 2021-11-17 | [
[
"Sharif",
"M.",
""
],
[
"Javed",
"Faisal",
""
]
] | This paper explores the possible existence of stable regions of bounded excursion gravastars in the background of regular black holes (Bardeen and Bardeen-de Sitter black holes). For this purpose, we match internal de Sitter geometry with an external regular black hole through an intermediate shell with an equation of ... |
gr-qc/9802068 | Don Marolf | Jorma Louko and Donald Marolf | Inextendible Schwarzschild black hole with a single exterior: How
thermal is the Hawking radiation? | 53 pages, REVTex v3.1 with amsfonts and epsf, includes 5 eps figures.
(v2: Title and abstract expanded, minor comments added. v3: Minor typos
corrected.) | Phys.Rev.D58:024007,1998 | 10.1103/PhysRevD.58.024007 | PPG98-79, SU-GP-98/2-1 | gr-qc hep-th | null | Several approaches to Hawking radiation on Schwarzschild spacetime rely in
some way or another on the fact that the Kruskal manifold has two causally
disconnected exterior regions. We investigate the Hawking(-Unruh) effect for a
real scalar field on the $\RPthree$ geon: an inextendible, globally hyperbolic,
space and... | [
{
"created": "Fri, 27 Feb 1998 14:49:47 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Apr 1998 13:44:09 GMT",
"version": "v2"
},
{
"created": "Mon, 22 Jun 1998 08:59:42 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Louko",
"Jorma",
""
],
[
"Marolf",
"Donald",
""
]
] | Several approaches to Hawking radiation on Schwarzschild spacetime rely in some way or another on the fact that the Kruskal manifold has two causally disconnected exterior regions. We investigate the Hawking(-Unruh) effect for a real scalar field on the $\RPthree$ geon: an inextendible, globally hyperbolic, space and t... |
gr-qc/0002056 | Guillermo A. Mena Marugan | Maria E. Angulo (Univ. of Sussex, UK) and Guillermo A. Mena Marugan
(IMAFF, CSIC, Spain) | Large quantum gravity effects: Cylindrical waves in four dimensions | Version accepted for publication in Int. J. Mod. Phys. D | Int.J.Mod.Phys.D9:669-686,2000 | 10.1142/S0218271800000633 | null | gr-qc | null | Linearly polarized cylindrical waves in four-dimensional vacuum gravity are
mathematically equivalent to rotationally symmetric gravity coupled to a
Maxwell (or Klein-Gordon) field in three dimensions. The quantization of this
latter system was performed by Ashtekar and Pierri in a recent work. Employing
that quantiz... | [
{
"created": "Wed, 16 Feb 2000 09:40:33 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jun 2000 08:03:31 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Angulo",
"Maria E.",
"",
"Univ. of Sussex, UK"
],
[
"Marugan",
"Guillermo A. Mena",
"",
"IMAFF, CSIC, Spain"
]
] | Linearly polarized cylindrical waves in four-dimensional vacuum gravity are mathematically equivalent to rotationally symmetric gravity coupled to a Maxwell (or Klein-Gordon) field in three dimensions. The quantization of this latter system was performed by Ashtekar and Pierri in a recent work. Employing that quantizat... |
gr-qc/0005028 | Felix Finster | Felix Finster, Joel Smoller, and Shing-Tung Yau | Absence of Static, Spherically Symmetric Black Hole Solutions for
Einstein-Dirac-Yang/Mills Equations with Complete Fermion Shells | 27 pages, 1 figure (published version) | Adv.Theor.Math.Phys.4:1231-1257,2002 | null | null | gr-qc math-ph math.AP math.MP | null | We study a static, spherically symmetric system of (2j+1) massive Dirac
particles, each having angular momentum j, j=1,2,..., in a classical
gravitational and SU(2) Yang-Mills field. We show that for any black hole
solution of the associated Einstein-Dirac-Yang/Mills equations, the spinors
must vanish identically out... | [
{
"created": "Wed, 10 May 2000 11:58:36 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Oct 2000 18:41:46 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Jun 2002 16:05:14 GMT",
"version": "v3"
}
] | 2010-11-19 | [
[
"Finster",
"Felix",
""
],
[
"Smoller",
"Joel",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | We study a static, spherically symmetric system of (2j+1) massive Dirac particles, each having angular momentum j, j=1,2,..., in a classical gravitational and SU(2) Yang-Mills field. We show that for any black hole solution of the associated Einstein-Dirac-Yang/Mills equations, the spinors must vanish identically outsi... |
1406.1930 | Vedad Pasic Dr | Vedad Pasic and Elvis Barakovic | PP-waves with Torsion - a Metric-affine Model for the Massless Neutrino | 24 pages. Corrected two references. The final publication is
available at springerlink.com. arXiv admin note: text overlap with
arXiv:gr-qc/0505157; and text overlap with arXiv:gr-qc/0304028,
arXiv:gr-qc/9402012 by other authors | General Relativ Gravit (2014) 46:1787 | 10.1007/s10714-014-1787-y | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we deal with quadratic metric-affine gravity, which we briefly
introduce, explain and give historical and physical reasons for using this
particular theory of gravity. Further, we introduce a generalisation of well
known spacetimes, namely pp-waves. A classical pp-wave is a 4-dimensional
Lorentzian spac... | [
{
"created": "Sat, 7 Jun 2014 21:10:33 GMT",
"version": "v1"
},
{
"created": "Sat, 9 Aug 2014 12:50:53 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Sep 2014 12:47:40 GMT",
"version": "v3"
}
] | 2014-09-04 | [
[
"Pasic",
"Vedad",
""
],
[
"Barakovic",
"Elvis",
""
]
] | In this paper we deal with quadratic metric-affine gravity, which we briefly introduce, explain and give historical and physical reasons for using this particular theory of gravity. Further, we introduce a generalisation of well known spacetimes, namely pp-waves. A classical pp-wave is a 4-dimensional Lorentzian spacet... |
1912.05315 | Roman Konoplya | Kirill A. Bronnikov and Roman A. Konoplya | Echoes in brane worlds: ringing at a black hole--wormhole transition | 9 pages, revtex, 6 figures | Phys. Rev. D 101, 064004 (2020) | 10.1103/PhysRevD.101.064004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Echoes are known as modifications of the usual quasinormal ringing of a black
hole at late times because of the deviation of space-time from the initial
black-hole geometry in a small region near its event horizon. We consider a
class of brane-world model solutions of the Shiromizu-Maeda-Sasaki equations,
which descr... | [
{
"created": "Wed, 11 Dec 2019 13:56:52 GMT",
"version": "v1"
}
] | 2020-03-11 | [
[
"Bronnikov",
"Kirill A.",
""
],
[
"Konoplya",
"Roman A.",
""
]
] | Echoes are known as modifications of the usual quasinormal ringing of a black hole at late times because of the deviation of space-time from the initial black-hole geometry in a small region near its event horizon. We consider a class of brane-world model solutions of the Shiromizu-Maeda-Sasaki equations, which describ... |
0810.0916 | Miodrag Krmar | Vladan Pankovic, Simo Ciganovic, Jovan Ivanovic | A Simple Determination of the (LOGARITHMIC) Corrections of Black Hole
Entropy "without Knowing the Details of Quantum Gravity" | 6 pages, no figures | null | null | PMF/Ph-12/08 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, starting by simple, approximate (quasi-classical) methods
presented in our previous works, we suggest a simple determination of the
(logarithmic) corrections of (Schwarzschild) black hole entropy "without
knowing the details of quantum gravity"(Fursaev). Namely, in our previous works
we demonstrated tha... | [
{
"created": "Mon, 6 Oct 2008 09:21:19 GMT",
"version": "v1"
}
] | 2008-10-07 | [
[
"Pankovic",
"Vladan",
""
],
[
"Ciganovic",
"Simo",
""
],
[
"Ivanovic",
"Jovan",
""
]
] | In this work, starting by simple, approximate (quasi-classical) methods presented in our previous works, we suggest a simple determination of the (logarithmic) corrections of (Schwarzschild) black hole entropy "without knowing the details of quantum gravity"(Fursaev). Namely, in our previous works we demonstrated that ... |
gr-qc/9811009 | Thomas B. Bahder | Thomas B. Bahder | Fermi Coordinates of an Observer Moving in a Circle in Minkowski Space:
Apparent Behavior of Clocks | null | null | null | null | gr-qc | null | Coordinate transformations are derived from global Minkowski coordinates to
the Fermi coordinates of an observer moving in a circle in Minkowski
space-time. The metric for the Fermi coordinates is calculated directly from
the tensor transformation rule. The behavior of ideal clocks is examined from
the observer's ref... | [
{
"created": "Tue, 3 Nov 1998 16:00:40 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bahder",
"Thomas B.",
""
]
] | Coordinate transformations are derived from global Minkowski coordinates to the Fermi coordinates of an observer moving in a circle in Minkowski space-time. The metric for the Fermi coordinates is calculated directly from the tensor transformation rule. The behavior of ideal clocks is examined from the observer's refer... |
1504.00306 | Mikhail Gorbatenko | M.V. Gorbatenko, V.P. Neznamov, E.Yu. Popov | Some Aspects of Quantum Mechanics of Particle Motion in Static Centrally
Symmetric Gravitational Fields | 21 pages, 2 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The domain of wave functions and effective potentials of the Dirac and
Klein-Gordon equations for quantum-mechanical particles in static centrally
symmetric gravitational fields are analyzed by taking into account the Hilbert
causality condition. For all the explored metrics, assuming existence of event
horizons, the... | [
{
"created": "Wed, 1 Apr 2015 17:25:20 GMT",
"version": "v1"
}
] | 2015-04-02 | [
[
"Gorbatenko",
"M. V.",
""
],
[
"Neznamov",
"V. P.",
""
],
[
"Popov",
"E. Yu.",
""
]
] | The domain of wave functions and effective potentials of the Dirac and Klein-Gordon equations for quantum-mechanical particles in static centrally symmetric gravitational fields are analyzed by taking into account the Hilbert causality condition. For all the explored metrics, assuming existence of event horizons, the c... |
1305.4461 | Jianwei Mei | Jianwei Mei | Fluctuating Black Hole Horizons | References added, nature of boundary stress tensor clarified,
discussion of statistics refined and a mistake with Hawking temperature
corrected, 16 pages; version to appear in journal | null | 10.1007/JHEP10(2013)195 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we treat the black hole horizon as a physical boundary to the
spacetime and study its dynamics following from the Gibbons-Hawking-York
boundary term. Using the Kerr black hole as an example we derive an effective
action that describes, in the large wave number limit, a massless Klein-Gordon
field living... | [
{
"created": "Mon, 20 May 2013 08:32:58 GMT",
"version": "v1"
},
{
"created": "Tue, 21 May 2013 19:57:42 GMT",
"version": "v2"
},
{
"created": "Mon, 7 Oct 2013 11:22:18 GMT",
"version": "v3"
}
] | 2015-06-16 | [
[
"Mei",
"Jianwei",
""
]
] | In this paper we treat the black hole horizon as a physical boundary to the spacetime and study its dynamics following from the Gibbons-Hawking-York boundary term. Using the Kerr black hole as an example we derive an effective action that describes, in the large wave number limit, a massless Klein-Gordon field living o... |
2109.00754 | Tousif Islam | Tousif Islam, Scott E. Field, Gaurav Khanna, Niels Warburton | Survey of gravitational wave memory in intermediate mass ratio binaries | 18 pages, 17 figures, matches the version published in PRD | Phys. Rev. D 108, 024046 (2023) | 10.1103/PhysRevD.108.024046 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The non-linear gravitational wave (GW) memory effect is a distinct prediction
in general relativity. While the effect has been well studied for comparable
mass binaries, it has mostly been overlooked for intermediate mass ratio
inspirals (IMRIs). We offer a comprehensive analysis of the phenomenology and
detectabilit... | [
{
"created": "Thu, 2 Sep 2021 07:24:42 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jul 2023 22:06:05 GMT",
"version": "v2"
}
] | 2023-07-26 | [
[
"Islam",
"Tousif",
""
],
[
"Field",
"Scott E.",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Warburton",
"Niels",
""
]
] | The non-linear gravitational wave (GW) memory effect is a distinct prediction in general relativity. While the effect has been well studied for comparable mass binaries, it has mostly been overlooked for intermediate mass ratio inspirals (IMRIs). We offer a comprehensive analysis of the phenomenology and detectability ... |
1905.00524 | Alexander Agathonov | Yu.G. Ignat'ev, A.A. Agathonov | Dynamics of cosmological models with nonlinear classical phantom scalar
fields. II. Qualitative analysis and numerical modeling | 10 pages, 16 figures | Phys J (2019) 61: 2092 | 10.1007/s11182-019-01642-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A detailed qualitative analysis and numerical modeling of the evolution of
cosmological models based on nonlinear classical and phantom scalar fields with
self-action are performed. Complete phase portraits of the corresponding
dynamical systems and their projections onto the Poincar\'e sphere are
constructed. It is ... | [
{
"created": "Wed, 1 May 2019 22:44:56 GMT",
"version": "v1"
}
] | 2019-05-03 | [
[
"Ignat'ev",
"Yu. G.",
""
],
[
"Agathonov",
"A. A.",
""
]
] | A detailed qualitative analysis and numerical modeling of the evolution of cosmological models based on nonlinear classical and phantom scalar fields with self-action are performed. Complete phase portraits of the corresponding dynamical systems and their projections onto the Poincar\'e sphere are constructed. It is sh... |
gr-qc/0502021 | Richard Shurtleff | Richard Shurtleff | Poincare Connections in Flat Spacetime | 18 pages, 6 problems, no figures, latex. In version 1, the torsion
survived the arc length formula that in fact destroys it. Some torsion
statements, the abstract, and the introduction are revised and some
typographical errors are fixed in version 2. The torsion problem does not
affect the main results | null | null | null | gr-qc | null | In flat spacetime, as a simple 4-vector, a particle's 4-velocity cannot be
changed by translation. Parallel translation then produces constant velocity,
motion without force. Here we consider a richer, but less well-known,
representation of the Poincare group of symmetries of flat spacetime in which
translation adds ... | [
{
"created": "Mon, 7 Feb 2005 20:33:49 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Feb 2005 17:04:57 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Shurtleff",
"Richard",
""
]
] | In flat spacetime, as a simple 4-vector, a particle's 4-velocity cannot be changed by translation. Parallel translation then produces constant velocity, motion without force. Here we consider a richer, but less well-known, representation of the Poincare group of symmetries of flat spacetime in which translation adds a ... |
0706.3890 | M Hossain Ali | M. Hossain Ali | Hawking Radiation via Tunneling from Hot NUT-Kerr-Newman-Kasuya
Spacetime | To appear in Class. Quant. Grav | Class.Quant.Grav.24:5849-5860,2007 | 10.1088/0264-9381/24/23/008 | null | gr-qc hep-th | null | We study the Hawking thermal spectrum in dragging coordinate system and the
tunneling radiation characteristics of hot NUT-Kerr-Newman-Kasuya spacetime.
The tunneling rates at the event and cosmological horizon are found to be
related to the change of Bekenstein-Hawking entropy. The radiation spectrum is
not pure the... | [
{
"created": "Tue, 26 Jun 2007 18:54:45 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Oct 2007 05:33:31 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Ali",
"M. Hossain",
""
]
] | We study the Hawking thermal spectrum in dragging coordinate system and the tunneling radiation characteristics of hot NUT-Kerr-Newman-Kasuya spacetime. The tunneling rates at the event and cosmological horizon are found to be related to the change of Bekenstein-Hawking entropy. The radiation spectrum is not pure therm... |
2102.03084 | Ke Wang | Ke Wang and Qing-Guo Huang | Gravitational Waves from Preheating with Modified Gravitational-wave
Propagation | 5 pages and 2 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate how the production of gravitational waves (GWs) is affected by
the GW velocity $(c_T)$ during preheating after inflation. For instance, we
simulate the production of GWs after $\lambda\phi^4$ chaotic inflation, and
find that GW spectrum is enhanced for $c_T<1$, but distorted (suppressed at low
frequenc... | [
{
"created": "Fri, 5 Feb 2021 10:12:18 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Feb 2021 07:44:56 GMT",
"version": "v2"
}
] | 2021-02-16 | [
[
"Wang",
"Ke",
""
],
[
"Huang",
"Qing-Guo",
""
]
] | We investigate how the production of gravitational waves (GWs) is affected by the GW velocity $(c_T)$ during preheating after inflation. For instance, we simulate the production of GWs after $\lambda\phi^4$ chaotic inflation, and find that GW spectrum is enhanced for $c_T<1$, but distorted (suppressed at low frequency,... |
2010.08837 | Rosie Hayward | Rosie Hayward and Fabio Biancalana | New Insights into the Nature of Nonlinear Gravitational Waves | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evolution equations for gravitational waves, which are derived
using the full metric to raise and lower indices. This method ensures full
consistency between the Ricci tensor and all gauge restrictions and
requirements, and allows a meaningful expansion of all tensors up to second
order, avoiding several... | [
{
"created": "Sat, 17 Oct 2020 18:04:13 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Oct 2020 15:28:58 GMT",
"version": "v2"
},
{
"created": "Mon, 30 Nov 2020 12:10:34 GMT",
"version": "v3"
},
{
"created": "Mon, 8 Nov 2021 09:41:20 GMT",
"version": "v4"
}
] | 2021-11-09 | [
[
"Hayward",
"Rosie",
""
],
[
"Biancalana",
"Fabio",
""
]
] | We study the evolution equations for gravitational waves, which are derived using the full metric to raise and lower indices. This method ensures full consistency between the Ricci tensor and all gauge restrictions and requirements, and allows a meaningful expansion of all tensors up to second order, avoiding several i... |
gr-qc/9304013 | null | I. Hauser and F. J. Ernst | Gurses' Type (b) Transformations are Neighborhood-Isometries | 10 pages, LATEX, FJE-93-003 | Phys.Rev.Lett. 71 (1993) 316-319 | 10.1103/PhysRevLett.71.316 | null | gr-qc | null | Following an idea close to one given by C. G. Torre (private communication),
we prove that Riemannian spaces (M,g) and (M,h) that are related by a Gurses
type (b) transformation [M. Gurses, Phys. Rev. Lett. 70, 367 (1993)] or,
equivalently, by a Torre-Anderson generalized diffeomorphism [C. G. Torre and
I. M. Anderso... | [
{
"created": "Fri, 9 Apr 1993 17:33:14 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Hauser",
"I.",
""
],
[
"Ernst",
"F. J.",
""
]
] | Following an idea close to one given by C. G. Torre (private communication), we prove that Riemannian spaces (M,g) and (M,h) that are related by a Gurses type (b) transformation [M. Gurses, Phys. Rev. Lett. 70, 367 (1993)] or, equivalently, by a Torre-Anderson generalized diffeomorphism [C. G. Torre and I. M. Anderson,... |
1102.1170 | Re Fiorentin Stefano | Stefano Re Fiorentin | A re-interpretation of the concept of mass and of the relativistic
mass-energy relation | null | Found.Phys.39:1394-1406,2009 | 10.1007/s10701-009-9359-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For over a century the definitions of mass and derivations of its relation
with energy continue to be elaborated, demonstrating that the concept of mass
is still not satisfactorily understood. The aim of this study is to show that,
starting from the properties of Minkowski spacetime and from the principle of
least ac... | [
{
"created": "Sun, 6 Feb 2011 17:07:37 GMT",
"version": "v1"
}
] | 2011-03-10 | [
[
"Fiorentin",
"Stefano Re",
""
]
] | For over a century the definitions of mass and derivations of its relation with energy continue to be elaborated, demonstrating that the concept of mass is still not satisfactorily understood. The aim of this study is to show that, starting from the properties of Minkowski spacetime and from the principle of least acti... |
2406.15512 | Otto Kong | Otto C.W. Kong (Nat'l Central U, Taiwan) | Quantum Mechanics in Curved Space(time) with a Noncommutative Geometric
Perspective | 24 pages in RevTex, no figure | null | null | NCU-HEP-k102 | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | We have previously presented a version of the Weak Equivalence Principle for
a quantum particle as an exact analog of the classical case, based on the
Heisenberg picture analysis of free particle motion. Here, we take that to a
full formalism of quantum mechanics in a generic curved space(time). Our basic
perspective... | [
{
"created": "Thu, 20 Jun 2024 10:44:06 GMT",
"version": "v1"
}
] | 2024-06-25 | [
[
"Kong",
"Otto C. W.",
"",
"Nat'l Central U, Taiwan"
]
] | We have previously presented a version of the Weak Equivalence Principle for a quantum particle as an exact analog of the classical case, based on the Heisenberg picture analysis of free particle motion. Here, we take that to a full formalism of quantum mechanics in a generic curved space(time). Our basic perspective i... |
2403.04888 | Dhruba Jyoti Gogoi Dr. | Yassine Sekhmani, Dhruba Jyoti Gogoi, Ratbay Myrzakulov and Javlon
Rayimbaev | Phase structures and critical behaviour of rational non-linear
electrodynamics AdS black holes in Rastall gravity | 23 pages, 7 figures | Communications in Theoretical Physics (2024) | 10.1088/1572-9494/ad30f4 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This research paper presents a black hole solution with a rational non-linear
electrodynamics source in the Rastall gravity framework. The paper analyzes the
thermodynamic properties of the solution in normal phase space and explores its
critical behavior. The phase structure is examined using the extended first law
... | [
{
"created": "Thu, 7 Mar 2024 20:44:50 GMT",
"version": "v1"
}
] | 2024-03-11 | [
[
"Sekhmani",
"Yassine",
""
],
[
"Gogoi",
"Dhruba Jyoti",
""
],
[
"Myrzakulov",
"Ratbay",
""
],
[
"Rayimbaev",
"Javlon",
""
]
] | This research paper presents a black hole solution with a rational non-linear electrodynamics source in the Rastall gravity framework. The paper analyzes the thermodynamic properties of the solution in normal phase space and explores its critical behavior. The phase structure is examined using the extended first law of... |
1610.04543 | Takuya Tsuchiya | Takuya Tsuchiya and Gen Yoneda | Constructing of constraint preserving scheme for Einstein equations | 8 pages, 1 figure | JSIAM Letters Vol. 9 (2017) p. 57-60 | 10.14495/jsiaml.9.57 | null | gr-qc math.DS math.NA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new numerical scheme of evolution for the Einstein equations
using the discrete variational derivative method (DVDM). We derive the discrete
evolution equation of the constraint using this scheme and show the constraint
preserves in the discrete level. In addition, to confirm the numerical
stability usin... | [
{
"created": "Fri, 14 Oct 2016 17:19:44 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Oct 2016 02:18:33 GMT",
"version": "v2"
},
{
"created": "Fri, 14 Jul 2017 09:08:21 GMT",
"version": "v3"
}
] | 2017-10-24 | [
[
"Tsuchiya",
"Takuya",
""
],
[
"Yoneda",
"Gen",
""
]
] | We propose a new numerical scheme of evolution for the Einstein equations using the discrete variational derivative method (DVDM). We derive the discrete evolution equation of the constraint using this scheme and show the constraint preserves in the discrete level. In addition, to confirm the numerical stability using ... |
gr-qc/9301002 | null | Edward Malec | Event horizons and apparent horizons in spherically symmetric geometries | 5 pages, plaintex | Phys.Rev.D49:6475-6483,1994 | 10.1103/PhysRevD.49.6475 | null | gr-qc | null | Spherical configurations that are very massive must be surrounded by apparent
horizons. These in turn, when placed outside a collapsing body, must propagate
outward with a velocity equal to the velocity of radially outgoing photons.
That proves, within the framework of (1+3) formalism and without resorting to
the Bir... | [
{
"created": "Wed, 6 Jan 1993 14:47:00 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Malec",
"Edward",
""
]
] | Spherical configurations that are very massive must be surrounded by apparent horizons. These in turn, when placed outside a collapsing body, must propagate outward with a velocity equal to the velocity of radially outgoing photons. That proves, within the framework of (1+3) formalism and without resorting to the Birkh... |
1509.04539 | Enrico Barausse | Enrico Barausse and Kent Yagi | Gravitational-wave emission in shift-symmetric Horndeski theories | 6 pages. Minor changes to match version accepted for publication in
PRL | Phys. Rev. Lett. 115, 211105 (2015) | 10.1103/PhysRevLett.115.211105 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravity theories beyond General Relativity typically predict dipolar
gravitational emission by compact-star binaries. This emission is sourced by
"sensitivity" parameters depending on the stellar compactness. We introduce a
general formalism to calculate these parameters, and show that in
shift-symmetric Horndeski th... | [
{
"created": "Tue, 15 Sep 2015 13:25:05 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Nov 2015 22:28:52 GMT",
"version": "v2"
}
] | 2015-11-25 | [
[
"Barausse",
"Enrico",
""
],
[
"Yagi",
"Kent",
""
]
] | Gravity theories beyond General Relativity typically predict dipolar gravitational emission by compact-star binaries. This emission is sourced by "sensitivity" parameters depending on the stellar compactness. We introduce a general formalism to calculate these parameters, and show that in shift-symmetric Horndeski theo... |
gr-qc/0601066 | Yasusada Nambu | H. Furuhashi and Y. Nambu and H. Saida | Simulation of Acoustic Black Hole in a Laval Nozzle | 26 pages, published version | Class.Quant.Grav. 23 (2006) 5417-5438 | 10.1088/0264-9381/23/17/018 | null | gr-qc | null | A numerical simulation of fluid flows in a Laval nozzle is performed to
observe formations of acoustic black holes and the classical counterpart to
Hawking radiation under a realistic setting of the laboratory experiment. We
determined the Hawking temperature of the acoustic black hole from obtained
numerical data. S... | [
{
"created": "Tue, 17 Jan 2006 03:55:55 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Sep 2006 04:04:52 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Furuhashi",
"H.",
""
],
[
"Nambu",
"Y.",
""
],
[
"Saida",
"H.",
""
]
] | A numerical simulation of fluid flows in a Laval nozzle is performed to observe formations of acoustic black holes and the classical counterpart to Hawking radiation under a realistic setting of the laboratory experiment. We determined the Hawking temperature of the acoustic black hole from obtained numerical data. Som... |
1211.4337 | Tehani Finch | Tehani K. Finch | Coordinate families for the Schwarzschild geometry based on radial
timelike geodesics | 13 pages and 10 figures. New title and abstract; expanded discussion
on Gautreau-Hoffmann coordinates, and coordinate classifications; figures
added; references added. Submitted for publication | Gen.Rel.Grav. 47 (2015) 56 | 10.1007/s10714-015-1891-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the connections between various coordinate systems associated with
observers moving inwardly along radial geodesics in the Schwarzschild geometry.
Painlev\'e-Gullstrand (PG) time is adapted to freely falling observers dropped
from rest from infinity; Lake-Martel-Poisson (LMP) time coordinates are adapted
t... | [
{
"created": "Mon, 19 Nov 2012 09:05:09 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Dec 2014 03:53:43 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Finch",
"Tehani K.",
""
]
] | We explore the connections between various coordinate systems associated with observers moving inwardly along radial geodesics in the Schwarzschild geometry. Painlev\'e-Gullstrand (PG) time is adapted to freely falling observers dropped from rest from infinity; Lake-Martel-Poisson (LMP) time coordinates are adapted to ... |
2009.05012 | Jorge Ananias Neto | Everton M. C. Abreu and Jorge Ananias Neto | On the nature of R\'enyi modified entropy and the Incomplete statistics
approach in black holes thermodynamics | Extended version. Title changed. To appear in Europhysics Letters
(EPL) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we have investigated the effects of the two highlighted
nongaussian entropies which are the modified R\'enyi entropy and the so-called
Incomplete statistics in the analysis of the thermodynamics of black holes
(BHs). We have obtained the equipartition theorems and after that we obtained
the heat capaciti... | [
{
"created": "Thu, 10 Sep 2020 17:20:28 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Apr 2021 00:39:47 GMT",
"version": "v2"
}
] | 2021-04-14 | [
[
"Abreu",
"Everton M. C.",
""
],
[
"Neto",
"Jorge Ananias",
""
]
] | In this work we have investigated the effects of the two highlighted nongaussian entropies which are the modified R\'enyi entropy and the so-called Incomplete statistics in the analysis of the thermodynamics of black holes (BHs). We have obtained the equipartition theorems and after that we obtained the heat capacities... |
0712.0272 | Julio Cesar Fabris | J.C. Fabris, D.F. Jardim, S.V.B. Goncalves | Instability of scalar perturbation in a phantomic cosmological scenario | Latex file, 6 pages | Europhys.Lett.82:69001,2008 | 10.1209/0295-5075/82/69001 | null | gr-qc astro-ph hep-th | null | Scalar perturbations can grow during a phantomic cosmological phase as the
big rip is approached, in spite of the high accelerated expansion regime, if
the equation of state is such that $\frac{p}{\rho} = \alpha < - {5/3}$. It is
shown that such result is independent of the spatial curvature. The perturbed
equations ... | [
{
"created": "Mon, 3 Dec 2007 12:31:52 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Fabris",
"J. C.",
""
],
[
"Jardim",
"D. F.",
""
],
[
"Goncalves",
"S. V. B.",
""
]
] | Scalar perturbations can grow during a phantomic cosmological phase as the big rip is approached, in spite of the high accelerated expansion regime, if the equation of state is such that $\frac{p}{\rho} = \alpha < - {5/3}$. It is shown that such result is independent of the spatial curvature. The perturbed equations ar... |
gr-qc/0110059 | Robert T. Jantzen | Donato Bini, Robert T Jantzen, Giovanni Miniutti | The Cotton, Simon-Mars and Cotton-York Tensors in Stationary Spacetimes | 14 pages latex(2e) iopart style, no figures | Class.Quant.Grav. 18 (2001) 4969 | 10.1088/0264-9381/18/22/317 | null | gr-qc | null | The Cotton-York and Simon-Mars tensors in stationary vacuum spacetimes are
studied in the language of the congruence approach pioneered by Hawking and
Ellis. Their relationships with the Papapetrou field defined by the stationary
Killing congruence and with a recent characterization of the Kerr spacetime in
terms of ... | [
{
"created": "Thu, 11 Oct 2001 15:21:05 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Bini",
"Donato",
""
],
[
"Jantzen",
"Robert T",
""
],
[
"Miniutti",
"Giovanni",
""
]
] | The Cotton-York and Simon-Mars tensors in stationary vacuum spacetimes are studied in the language of the congruence approach pioneered by Hawking and Ellis. Their relationships with the Papapetrou field defined by the stationary Killing congruence and with a recent characterization of the Kerr spacetime in terms of th... |
1302.3833 | Alejandro Corichi | Ivan Agullo and Alejandro Corichi | Loop Quantum Cosmology | To appear as a Chapter of "The Springer Handbook of Spacetime,"
edited by A. Ashtekar and V. Petkov. (Springer-Verlag, at Press). 52 pages, 5
figures | null | 10.1007/978-3-642-41992-8_39 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This Chapter provides an up to date, pedagogical review of some of the most
relevant advances in loop quantum cosmology. We review the quantization of
homogeneous cosmological models, their singularity resolution and the
formulation of effective equations that incorporate the main quantum
corrections to the dynamics.... | [
{
"created": "Fri, 15 Feb 2013 18:20:53 GMT",
"version": "v1"
}
] | 2015-06-15 | [
[
"Agullo",
"Ivan",
""
],
[
"Corichi",
"Alejandro",
""
]
] | This Chapter provides an up to date, pedagogical review of some of the most relevant advances in loop quantum cosmology. We review the quantization of homogeneous cosmological models, their singularity resolution and the formulation of effective equations that incorporate the main quantum corrections to the dynamics. W... |
1811.01391 | Plyatsko Roman | Roman Plyatsko, Volodymyr Panat, Mykola Fenyk | Nonequatorial circular orbits of spinning particles in the
Schwarzschild-de Sitter background | 18 pages | Gen. Relativ. Gravit. 2018, 50:150 | 10.1007/s10714-018-2474-1 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper analytical solutions of the Mathisson-Papapetrou equations that
describe nonequatorial circular orbits of a spinning particle in the
Schwarzschild-de Sitter background are studied, and the role of the
cosmological constant is emphasized. It is shown that generally speaking a
highly relativistic velocity... | [
{
"created": "Sun, 4 Nov 2018 16:00:26 GMT",
"version": "v1"
},
{
"created": "Sat, 1 Dec 2018 18:10:15 GMT",
"version": "v2"
}
] | 2018-12-04 | [
[
"Plyatsko",
"Roman",
""
],
[
"Panat",
"Volodymyr",
""
],
[
"Fenyk",
"Mykola",
""
]
] | In this paper analytical solutions of the Mathisson-Papapetrou equations that describe nonequatorial circular orbits of a spinning particle in the Schwarzschild-de Sitter background are studied, and the role of the cosmological constant is emphasized. It is shown that generally speaking a highly relativistic velocity o... |
gr-qc/0210016 | Marcelo J. Reboucas | G.I. Gomero, M.J. Reboucas, R. Tavakol | Limits on the Detectability of Cosmic Topology in Hyperbolic Universes | 10 pages, 2 figures, LaTeX2e. To appear in Int. J. Mod. Phys. A
(2002). Contribution to the Fifth Alexander Friedmann International Seminar
on Gravitation and Cosmology | Int.J.Mod.Phys. A17 (2002) 4261-4272 | 10.1142/S0217751X02013307 | CBPF-NF-026/02 | gr-qc astro-ph hep-th math-ph math.MP | null | We reexamine the possibility of the detection of the cosmic topology in
nearly flat hyperbolic Friedmann-Lemaitre-Robertson-Walker (FLRW) universes by
using patterns repetition. We update and extend our recent results in two
important ways: by employing recent observational constraints on the
cosmological density par... | [
{
"created": "Fri, 4 Oct 2002 23:31:56 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Gomero",
"G. I.",
""
],
[
"Reboucas",
"M. J.",
""
],
[
"Tavakol",
"R.",
""
]
] | We reexamine the possibility of the detection of the cosmic topology in nearly flat hyperbolic Friedmann-Lemaitre-Robertson-Walker (FLRW) universes by using patterns repetition. We update and extend our recent results in two important ways: by employing recent observational constraints on the cosmological density param... |
2106.07128 | Kazufumi Takahashi | Kazufumi Takahashi, Hayato Motohashi | Black hole perturbations in DHOST theories: Master variables, gradient
instability, and strong coupling | 25 pages | JCAP 08 (2021) 013 | 10.1088/1475-7516/2021/08/013 | YITP-21-38 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study linear perturbations about static and spherically symmetric black
hole solutions with stealth scalar hair in degenerate higher-order
scalar-tensor (DHOST) theories. We clarify master variables and derive the
quadratic Lagrangian for both odd- and even-parity perturbations. It is shown
that the even modes are... | [
{
"created": "Mon, 14 Jun 2021 01:37:03 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Aug 2021 13:34:32 GMT",
"version": "v2"
}
] | 2021-08-11 | [
[
"Takahashi",
"Kazufumi",
""
],
[
"Motohashi",
"Hayato",
""
]
] | We study linear perturbations about static and spherically symmetric black hole solutions with stealth scalar hair in degenerate higher-order scalar-tensor (DHOST) theories. We clarify master variables and derive the quadratic Lagrangian for both odd- and even-parity perturbations. It is shown that the even modes are i... |
1712.07978 | Freddy Cueva Solano | Freddy Cueva Solano | Modeling interacting dark energy models with Chebyshev polynomials:
Exploring their constraints and effects | 15pages,7 figures,Submitted for PRD. arXiv admin note: text overlap
with arXiv:1612.02484 | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | In this work, we examine the main cosmological effects derived from a
time-varying coupling ($\bar{Q}$) between a dark matter (DM) fluid and a dark
energy (DE) fluid with time-varying DE equation state (EoS) parameter
($\omega_{DE}$), in two different coupled DE models. These scenarios were built
in terms of Chebysch... | [
{
"created": "Tue, 19 Dec 2017 22:33:05 GMT",
"version": "v1"
}
] | 2017-12-22 | [
[
"Solano",
"Freddy Cueva",
""
]
] | In this work, we examine the main cosmological effects derived from a time-varying coupling ($\bar{Q}$) between a dark matter (DM) fluid and a dark energy (DE) fluid with time-varying DE equation state (EoS) parameter ($\omega_{DE}$), in two different coupled DE models. These scenarios were built in terms of Chebyschev... |
gr-qc/0312005 | Dan Brown | Daniel Brown | A Graph Model for the quantum mechanics of a moving cyclic disturbance
interacting at a spatial position | 17 pages, 2 figures | null | null | null | gr-qc | null | An analysis is made of a moving disturbance using a directed cyclic graph.
A statistical approach is used to calculate the alternative positions in
space and state of the disturbance with a defined observed time. The
probability for a freely moving entity interacting in a particular spatial
position is calculated a... | [
{
"created": "Sun, 30 Nov 2003 20:45:12 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Mar 2004 16:37:59 GMT",
"version": "v2"
},
{
"created": "Thu, 12 Aug 2004 11:09:09 GMT",
"version": "v3"
},
{
"created": "Mon, 20 Mar 2006 09:36:54 GMT",
"version": "v4"
},
{
"cr... | 2007-05-23 | [
[
"Brown",
"Daniel",
""
]
] | An analysis is made of a moving disturbance using a directed cyclic graph. A statistical approach is used to calculate the alternative positions in space and state of the disturbance with a defined observed time. The probability for a freely moving entity interacting in a particular spatial position is calculated and a... |
gr-qc/0305021 | Marcus S. Cohen | Marcus S. Cohen | Clifford Tetrads, Null Zig Zags, and Quantum Gravity | 32 pages, submitted to Advances in Applied Clifford Algebras | null | null | null | gr-qc | null | Quantum Gravity has been so elusive because we have tried to approach it by
two paths which can never meet: standard quantum field theory and general
relativity. The gateway is covariance under the complexified Clifford algebra
of our space-time manifold M, and its spinor representations, which Sachs
dubbed the Einst... | [
{
"created": "Mon, 5 May 2003 18:43:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cohen",
"Marcus S.",
""
]
] | Quantum Gravity has been so elusive because we have tried to approach it by two paths which can never meet: standard quantum field theory and general relativity. The gateway is covariance under the complexified Clifford algebra of our space-time manifold M, and its spinor representations, which Sachs dubbed the Einstei... |
1112.6349 | Ernesto F. Eiroa | Leonardo Amarilla, Ernesto F. Eiroa | Shadow of a rotating braneworld black hole | 11 pages, 6 figures. v2: improved version (includes 2 new figures) | Phys.Rev.D85:064019,2012 | 10.1103/PhysRevD.85.064019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the shadow cast by a rotating braneworld black hole, in the
Randall-Sundrum scenario. In addition to the angular momentum, the tidal charge
term deforms the shape of the shadow. For a given value of the rotation
parameter, the presence of a negative tidal charge enlarges the shadow and
reduces its defo... | [
{
"created": "Thu, 29 Dec 2011 17:09:00 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Mar 2012 15:08:01 GMT",
"version": "v2"
}
] | 2012-03-19 | [
[
"Amarilla",
"Leonardo",
""
],
[
"Eiroa",
"Ernesto F.",
""
]
] | We investigate the shadow cast by a rotating braneworld black hole, in the Randall-Sundrum scenario. In addition to the angular momentum, the tidal charge term deforms the shape of the shadow. For a given value of the rotation parameter, the presence of a negative tidal charge enlarges the shadow and reduces its deform... |
1503.07556 | Shannon Ray | Shannon Ray, Warner A. Miller, Paul M. Alsing and Shing-Tung Yau | Adiabatic Isometric Mapping Algorithm for Embedding 2-Surfaces in
Euclidean 3-Space | This version has updated figures and corrected typos | null | 10.1088/0264-9381/32/23/235012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Alexandrov proved that any simplicial complex homeomorphic to a sphere with
strictly non-negative Gaussian curvature at each vertex can be isometrically
embedded uniquely in $\mathbb{R}^3$ as a convex polyhedron. Due to the
nonconstructive nature of his proof, there have yet to be any algorithms, that
we know of, tha... | [
{
"created": "Wed, 25 Mar 2015 21:02:18 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Oct 2017 19:45:23 GMT",
"version": "v2"
}
] | 2017-10-30 | [
[
"Ray",
"Shannon",
""
],
[
"Miller",
"Warner A.",
""
],
[
"Alsing",
"Paul M.",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | Alexandrov proved that any simplicial complex homeomorphic to a sphere with strictly non-negative Gaussian curvature at each vertex can be isometrically embedded uniquely in $\mathbb{R}^3$ as a convex polyhedron. Due to the nonconstructive nature of his proof, there have yet to be any algorithms, that we know of, that ... |
1812.11264 | I. V. Kanatchikov | I.V. Kanatchikov | Precanonical structure of the Schr\"odinger wave functional in curved
space-time | 13 pages. arXiv admin note: text overlap with arXiv:1810.09968 | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A relationship between the functional Schr\"odinger representation and the
precanonical quantization of a scalar field theory is extended to an arbitrary
curved space-time. The canonical functional derivative Schr\"odinger equation
is derived from the manifestly covariant precanonical Schr\"odinger equation
and the S... | [
{
"created": "Sat, 29 Dec 2018 01:55:14 GMT",
"version": "v1"
}
] | 2019-02-08 | [
[
"Kanatchikov",
"I. V.",
""
]
] | A relationship between the functional Schr\"odinger representation and the precanonical quantization of a scalar field theory is extended to an arbitrary curved space-time. The canonical functional derivative Schr\"odinger equation is derived from the manifestly covariant precanonical Schr\"odinger equation and the Sch... |
1501.06234 | Leo Medeiros Gouvea | R. R. Cuzinatto, C. A. M. de Melo, K. C. de Vasconcelos, L. G.
Medeiros, P. J. Pompeia | Non-linear effects on radiation propagation around a charged compact
object | 7 pages, no figures, new references added, minor corrections in some
equations | Astrophys. Space Sci. v.359 p.59 (2015) | 10.1007/s10509-015-2505-2 | null | gr-qc astro-ph.HE astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The propagation of non-linear electromagnetic waves is carefully analyzed on
a curved spacetime created by static spherically symmetric mass and charge
distribution. We compute how non-linear electrodynamics affects the geodesic
deviation and the redshift of photons propagating near this massive charged
object. In th... | [
{
"created": "Mon, 26 Jan 2015 02:09:57 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Apr 2015 04:56:24 GMT",
"version": "v2"
},
{
"created": "Thu, 22 Dec 2016 04:47:23 GMT",
"version": "v3"
}
] | 2016-12-23 | [
[
"Cuzinatto",
"R. R.",
""
],
[
"de Melo",
"C. A. M.",
""
],
[
"de Vasconcelos",
"K. C.",
""
],
[
"Medeiros",
"L. G.",
""
],
[
"Pompeia",
"P. J.",
""
]
] | The propagation of non-linear electromagnetic waves is carefully analyzed on a curved spacetime created by static spherically symmetric mass and charge distribution. We compute how non-linear electrodynamics affects the geodesic deviation and the redshift of photons propagating near this massive charged object. In the ... |
2209.05905 | Karim Thebault | Karim P. Y. Thebault | Big Bang Singularity Resolution In Quantum Cosmology | forthcoming in Classical and Quantum Gravity | null | 10.1088/1361-6382/acb752 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We evaluate the physical viability and logical strength of an array of
putative criteria for big bang singularity resolution in quantum cosmology.
Based on this analysis, we propose a mutually consistent set of constitutive
conditions, which we argue should be taken to jointly define `global' and
`local' big bang sin... | [
{
"created": "Tue, 13 Sep 2022 11:39:45 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Jan 2023 09:28:51 GMT",
"version": "v2"
}
] | 2023-02-22 | [
[
"Thebault",
"Karim P. Y.",
""
]
] | We evaluate the physical viability and logical strength of an array of putative criteria for big bang singularity resolution in quantum cosmology. Based on this analysis, we propose a mutually consistent set of constitutive conditions, which we argue should be taken to jointly define `global' and `local' big bang singu... |
gr-qc/0011016 | Yavuz Nutku | A. N. Aliev and Y. Nutku | Impulsive spherical gravitational waves | null | Class.Quant.Grav. 18 (2001) 891-906 | 10.1088/0264-9381/18/5/308 | null | gr-qc | null | Penrose's identification with warp provides the general framework for
constructing the continuous form of impulsive gravitational wave metrics. We
present the 2-component spinor formalism for the derivation of the full family
of impulsive spherical gravitational wave metrics which brings out the power in
identificati... | [
{
"created": "Mon, 6 Nov 2000 13:39:45 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Aliev",
"A. N.",
""
],
[
"Nutku",
"Y.",
""
]
] | Penrose's identification with warp provides the general framework for constructing the continuous form of impulsive gravitational wave metrics. We present the 2-component spinor formalism for the derivation of the full family of impulsive spherical gravitational wave metrics which brings out the power in identification... |
1011.0061 | Gerard Hooft 't | Gerard 't Hooft | The Conformal Constraint in Canonical Quantum Gravity | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Perturbative canonical quantum gravity is considered, when coupled to a
renormalizable model for matter fields. It is proposed that the functional
integral over the dilaton field should be disentangled from the other
integrations over the metric fields. This should generate a conformally
invariant theory as an interm... | [
{
"created": "Sat, 30 Oct 2010 11:22:42 GMT",
"version": "v1"
}
] | 2010-11-02 | [
[
"Hooft",
"Gerard 't",
""
]
] | Perturbative canonical quantum gravity is considered, when coupled to a renormalizable model for matter fields. It is proposed that the functional integral over the dilaton field should be disentangled from the other integrations over the metric fields. This should generate a conformally invariant theory as an intermed... |
2308.12811 | Jansen Formiga | J. B. Formiga and Jo\~ao Duarte | On the gravitational energy problem and the energy of photons | It has been published in Physical Review D under the title
Gravitational energy problem and the energy of photons | Phys. Rev. D 108, 044043 (2023) | 10.1103/PhysRevD.108.044043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The lack of a well-established solution for the gravitational energy problem
might be one of the reasons why a clear road to quantum gravity does not exist.
In this paper, the gravitational energy is studied in detail with the help of
the teleparallel approach that is equivalent to general relativity. This
approach i... | [
{
"created": "Thu, 24 Aug 2023 14:14:59 GMT",
"version": "v1"
}
] | 2023-08-25 | [
[
"Formiga",
"J. B.",
""
],
[
"Duarte",
"João",
""
]
] | The lack of a well-established solution for the gravitational energy problem might be one of the reasons why a clear road to quantum gravity does not exist. In this paper, the gravitational energy is studied in detail with the help of the teleparallel approach that is equivalent to general relativity. This approach is ... |
2303.10352 | Shaobo Zhang | Shaobo Zhang, Zengli Ba, Denghui Ning, Nianfu Zhai, Zhengtian Lu, Dong
Sheng | Search for spin-dependent gravitational interactions at the Earth range | Accepted by Physical Review Letters | null | 10.1103/PhysRevLett.130.201401 | null | gr-qc hep-ex physics.atom-ph | http://creativecommons.org/licenses/by/4.0/ | Among the four fundamental forces, only gravity does not couple to particle
spins according to the general theory of relativity. We test this principle by
searching for an anomalous scalar coupling between the neutron spin and the
Earth gravity on the ground. We develop an atomic gas comagnetometer to measure
the rat... | [
{
"created": "Sat, 18 Mar 2023 07:13:31 GMT",
"version": "v1"
}
] | 2023-05-24 | [
[
"Zhang",
"Shaobo",
""
],
[
"Ba",
"Zengli",
""
],
[
"Ning",
"Denghui",
""
],
[
"Zhai",
"Nianfu",
""
],
[
"Lu",
"Zhengtian",
""
],
[
"Sheng",
"Dong",
""
]
] | Among the four fundamental forces, only gravity does not couple to particle spins according to the general theory of relativity. We test this principle by searching for an anomalous scalar coupling between the neutron spin and the Earth gravity on the ground. We develop an atomic gas comagnetometer to measure the ratio... |
1206.5229 | Frank B. Estabrook | Frank B. Estabrook | Specialized Orthonormal Frames and Embedding | null | SIGMA 9 (2013), 012, 5 pages | 10.3842/SIGMA.2013.012 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by-nc-sa/3.0/ | We discuss some specializations of the frames of flat orthonormal frame
bundles over geometries of indefinite signature, and the resulting symmetries
of families of embedded Riemannian or pseudo-Riemannian geometries. The
specializations are closed sets of linear constraints on the connection 1-forms
of the framing. ... | [
{
"created": "Fri, 22 Jun 2012 18:44:14 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Feb 2013 06:28:50 GMT",
"version": "v2"
}
] | 2013-02-18 | [
[
"Estabrook",
"Frank B.",
""
]
] | We discuss some specializations of the frames of flat orthonormal frame bundles over geometries of indefinite signature, and the resulting symmetries of families of embedded Riemannian or pseudo-Riemannian geometries. The specializations are closed sets of linear constraints on the connection 1-forms of the framing. Th... |
1005.1432 | Paul O'Hara | Paul O'Hara | Non-geodesic Motion in General Relativity and Thermodynamics | 11 pages | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a previous article a relationship was established between the linearized
metrics of General Relativity associated with geodesics and the Dirac Equation
of quantum mechanics. In this paper the extension of that result to arbitrary
curves is investigated. In the case of scalar fields, a relationship between
mass and... | [
{
"created": "Mon, 10 May 2010 00:12:44 GMT",
"version": "v1"
}
] | 2010-05-11 | [
[
"O'Hara",
"Paul",
""
]
] | In a previous article a relationship was established between the linearized metrics of General Relativity associated with geodesics and the Dirac Equation of quantum mechanics. In this paper the extension of that result to arbitrary curves is investigated. In the case of scalar fields, a relationship between mass and t... |
2204.05470 | Yaoguang Zheng | Wen-Xiang Chen, Yao-Guang Zheng | Thermodynamic geometry analysis of new Schwarzschild black holes | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article puts forward a hypothesis.In this article, the derivative of the
cosmological constant is positive, and there is a possibility that the constant
evolves from negative in the early universe to positive in the later period. We
see that when the black hole is an extreme black hole $r_{+}=r_{-}$, the
curvatu... | [
{
"created": "Tue, 12 Apr 2022 01:42:58 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Apr 2022 01:41:24 GMT",
"version": "v2"
}
] | 2022-04-19 | [
[
"Chen",
"Wen-Xiang",
""
],
[
"Zheng",
"Yao-Guang",
""
]
] | This article puts forward a hypothesis.In this article, the derivative of the cosmological constant is positive, and there is a possibility that the constant evolves from negative in the early universe to positive in the later period. We see that when the black hole is an extreme black hole $r_{+}=r_{-}$, the curvature... |
gr-qc/9610010 | Piotr Chrusciel | Piotr T. Chru\'sciel | Uniqueness of stationary, electro-vacuum black holes revisited | 24 pages, latex with amsfonts | Helv.Phys.Acta 69 (1996) 529-552 | null | null | gr-qc | null | In recent years there has been some progress in the understanding of the
global structure of stationary black hole space-times. In this paper we review
some new results concerning the structure of stationary black hole space-times.
In particular we prove a corrected version of the ``black hole rigidity
theorem'', and... | [
{
"created": "Wed, 9 Oct 1996 10:50:23 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Chruściel",
"Piotr T.",
""
]
] | In recent years there has been some progress in the understanding of the global structure of stationary black hole space-times. In this paper we review some new results concerning the structure of stationary black hole space-times. In particular we prove a corrected version of the ``black hole rigidity theorem'', and w... |
1511.03324 | Philippe G. LeFloch | Philippe G. LeFloch and Yue Ma | The global nonlinear stability of Minkowski space for self-gravitating
massive fields | 165 pages | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The theory presented in this monograph establishes the first mathematically
rigorous result on the global nonlinear stability of self-gravitating matter
under small perturbations of an asymptotically flat, spacelike hypersurface of
Minkowski spacetime. It allows one to exclude the existence of dynamically
unstable, s... | [
{
"created": "Tue, 10 Nov 2015 22:42:42 GMT",
"version": "v1"
},
{
"created": "Thu, 12 May 2016 01:49:36 GMT",
"version": "v2"
},
{
"created": "Thu, 29 Dec 2016 18:28:13 GMT",
"version": "v3"
},
{
"created": "Mon, 3 Jul 2017 16:23:13 GMT",
"version": "v4"
}
] | 2017-07-04 | [
[
"LeFloch",
"Philippe G.",
""
],
[
"Ma",
"Yue",
""
]
] | The theory presented in this monograph establishes the first mathematically rigorous result on the global nonlinear stability of self-gravitating matter under small perturbations of an asymptotically flat, spacelike hypersurface of Minkowski spacetime. It allows one to exclude the existence of dynamically unstable, sel... |
gr-qc/9506045 | Manuela Campanelli | Manuela Campanelli | Comment on ``Perturbative Method to solve fourth-order Gravity Field
Equations" | 6 pages, Revtex | null | null | UAB-FT-371 | gr-qc astro-ph hep-th | null | We reconsider the cosmic string perturbative solution to the classical
fourth-order gravity field equations, obtained in Ref.\cite{CLA94}, and we
obtain that static, cylindricaly symmetric gauge cosmic strings, with constant
energy density, can contain only $\beta$-terms in the first order corrections
to the interior... | [
{
"created": "Thu, 22 Jun 1995 11:14:06 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Campanelli",
"Manuela",
""
]
] | We reconsider the cosmic string perturbative solution to the classical fourth-order gravity field equations, obtained in Ref.\cite{CLA94}, and we obtain that static, cylindricaly symmetric gauge cosmic strings, with constant energy density, can contain only $\beta$-terms in the first order corrections to the interior g... |
2312.16081 | Mohsen Khodadi | Seyed Naseh Sajadi, Mohsen Khodadi, Orlando Luongo, Hernando Quevedo | Anisotropic Generalized Polytropic Spheres: Regular 3D Black Holes | 17 pages, 9 figures, 1 table, 2 appendix, v2: discussion improved and
extended, figures added, references updated, version accepted for publication | Phys.Dark Univ. 45 (2024) 101525 | 10.1016/j.dark.2024.101525 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We model gravitating relativistic 3D spheres composed of an anisotropic fluid
in which the radial and transverse components of the pressure correspond to the
vacuum energy and a generalized polytropic equation-of-state, respectively. By
using the generalized Tolman-Oppenheimer-Volkoff (TOV) equation, and solving
the ... | [
{
"created": "Tue, 26 Dec 2023 15:09:35 GMT",
"version": "v1"
},
{
"created": "Tue, 7 May 2024 18:05:56 GMT",
"version": "v2"
}
] | 2024-05-20 | [
[
"Sajadi",
"Seyed Naseh",
""
],
[
"Khodadi",
"Mohsen",
""
],
[
"Luongo",
"Orlando",
""
],
[
"Quevedo",
"Hernando",
""
]
] | We model gravitating relativistic 3D spheres composed of an anisotropic fluid in which the radial and transverse components of the pressure correspond to the vacuum energy and a generalized polytropic equation-of-state, respectively. By using the generalized Tolman-Oppenheimer-Volkoff (TOV) equation, and solving the co... |
1504.00453 | Mohammad Vahid Takook | S. Parsamehr, M. Enayati and M.V. Takook | Super-gauge Field in de Sitter Universe | 21 pages | Eur. Phys. J. C (2016) 76: 260 | 10.1140/epjc/s10052-016-4027-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Gupta-Bleuler triplet for vector-spinor gauge field is presented in de
Sitter ambient space formalism. The invariant space of field equation solutions
is obtained with respect to an indecomposable representation of the de Sitter
group. By using the general solution of the massless spin-$\frac{3}{2}$ field
equatio... | [
{
"created": "Thu, 2 Apr 2015 06:45:13 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jul 2016 06:18:09 GMT",
"version": "v2"
}
] | 2016-07-22 | [
[
"Parsamehr",
"S.",
""
],
[
"Enayati",
"M.",
""
],
[
"Takook",
"M. V.",
""
]
] | The Gupta-Bleuler triplet for vector-spinor gauge field is presented in de Sitter ambient space formalism. The invariant space of field equation solutions is obtained with respect to an indecomposable representation of the de Sitter group. By using the general solution of the massless spin-$\frac{3}{2}$ field equation,... |
1309.6221 | Berit Behnke | The LIGO Scientific Collaboration and The Virgo Collaboration: J.
Aasi, J. Abadie, B. P. Abbott, R. Abbott, T. Abbott, M. R. Abernathy, T.
Accadia, F. Acernese, C. Adams, T. Adams, R. X. Adhikari, C. Affeldt, M.
Agathos, N. Aggarwal, O. D. Aguiar, P. Ajith, B. Allen, A. Allocca, E. Amador
Ceron, D. Amariutei, R... | A directed search for continuous Gravitational Waves from the Galactic
Center | 12 pages, 3 figures, 1 table; PDFLaTeX; to be published in
Phys.Rev.D; a science summary can be found at
http://www.ligo.org/science/Publication-GCSearch/index.php | Phys. Rev. D 88, 102002 (2013) | 10.1103/PhysRevD.88.102002 | LIGO-P1300037 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the results of a directed search for continuous gravitational
waves from unknown, isolated neutron stars in the Galactic Center region,
performed on two years of data from LIGO's fifth science run from two LIGO
detectors. The search uses a semi-coherent approach, analyzing coherently 630
segments, each spa... | [
{
"created": "Tue, 24 Sep 2013 15:41:41 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Sep 2013 09:54:20 GMT",
"version": "v2"
}
] | 2013-11-27 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"The Virgo Collaboration",
"",
""
],
[
"Aasi",
"J.",
""
],
[
"Abadie",
"J.",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T.",
""
... | We present the results of a directed search for continuous gravitational waves from unknown, isolated neutron stars in the Galactic Center region, performed on two years of data from LIGO's fifth science run from two LIGO detectors. The search uses a semi-coherent approach, analyzing coherently 630 segments, each spann... |
gr-qc/0309111 | Gilberto Medeiros Kremer | G. M. Kremer | Cosmological models described by a mixture of van der Waals fluid and
dark energy | 5 pages, 5 figures. To be published in Physical Review D | Phys.Rev. D68 (2003) 123507 | 10.1103/PhysRevD.68.123507 | null | gr-qc | null | The Universe is modeled as a binary mixture whose constituents are described
by a van der Waals fluid and by a dark energy density. The dark energy density
is considered either as the quintessence or as the Chaplygin gas. The
irreversible processes concerning the energy transfer between the van der Waals
fluid and th... | [
{
"created": "Tue, 23 Sep 2003 11:39:10 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Kremer",
"G. M.",
""
]
] | The Universe is modeled as a binary mixture whose constituents are described by a van der Waals fluid and by a dark energy density. The dark energy density is considered either as the quintessence or as the Chaplygin gas. The irreversible processes concerning the energy transfer between the van der Waals fluid and the ... |
2112.12519 | Erick Tuiran | O. Ruiz and E. Tuiran | Non-Perturbative Quantum Correction to the Reissner-Nordstr\"om
spacetime with Running Newton's Constant | 45 pages, 6 figures | Phys. Rev. D 107, 066003 (2023) | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the consequences of the running Newton's constant on several key
aspects of spherically symmetric charged black holes by performing a
renormalization group improvement of the classical Reissner-Nordstr\"om metric
within the framework of the Einstein-Hilbert truncation in quantum Einstein
gravity. In particul... | [
{
"created": "Thu, 23 Dec 2021 13:20:18 GMT",
"version": "v1"
}
] | 2023-03-09 | [
[
"Ruiz",
"O.",
""
],
[
"Tuiran",
"E.",
""
]
] | We study the consequences of the running Newton's constant on several key aspects of spherically symmetric charged black holes by performing a renormalization group improvement of the classical Reissner-Nordstr\"om metric within the framework of the Einstein-Hilbert truncation in quantum Einstein gravity. In particular... |
2211.12349 | Arthur Menezes Lima | A. Lima, G. Alencar and J. Furtado | Black string bounce to traversable wormhole | 8 pages, 6 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, a regular black string solution will be presented from the
method used by Simpson-Visser to regularize the Schwarzschild solution. As in
the Simpson-Visser work, in this new black string solution, it is possible to
represent both a regular black hole and a wormhole just by changing the value
of a parame... | [
{
"created": "Tue, 22 Nov 2022 15:37:01 GMT",
"version": "v1"
}
] | 2022-11-23 | [
[
"Lima",
"A.",
""
],
[
"Alencar",
"G.",
""
],
[
"Furtado",
"J.",
""
]
] | In this work, a regular black string solution will be presented from the method used by Simpson-Visser to regularize the Schwarzschild solution. As in the Simpson-Visser work, in this new black string solution, it is possible to represent both a regular black hole and a wormhole just by changing the value of a paramete... |
gr-qc/9811068 | Martin Goliath | Martin Goliath and George F. R. Ellis | Homogeneous cosmologies with cosmological constant | 10 pages, 13 eps-figures. Submitted to Phys. Rev. D | Phys.Rev.D60:023502,1999 | 10.1103/PhysRevD.60.023502 | mth.uct.ac.za-9811 | gr-qc astro-ph | null | Spatially homogeneous cosmological models with a positive cosmological
constant are investigated, using dynamical systems methods. We focus on the
future evolution of these models. In particular, we address the question
whether there are models within this class that are de Sitter-like in the
future, but are tilted.
| [
{
"created": "Thu, 19 Nov 1998 16:56:32 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Feb 1999 11:23:48 GMT",
"version": "v2"
}
] | 2011-07-18 | [
[
"Goliath",
"Martin",
""
],
[
"Ellis",
"George F. R.",
""
]
] | Spatially homogeneous cosmological models with a positive cosmological constant are investigated, using dynamical systems methods. We focus on the future evolution of these models. In particular, we address the question whether there are models within this class that are de Sitter-like in the future, but are tilted. |
2203.03174 | Sizheng Ma | Sizheng Ma, Qingwen Wang, Nils Deppe, Fran\c{c}ois H\'ebert, Lawrence
E. Kidder, Jordan Moxon, William Throwe, Nils L. Vu, Mark A. Scheel, Yanbei
Chen | Gravitational-wave echoes from numerical-relativity waveforms via
space-time construction near merging compact objects | null | Phys. Rev. D 105, 104007 (2022) | 10.1103/PhysRevD.105.104007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new approach toward reconstructing the late-time near-horizon
geometry of merging binary black holes, and toward computing gravitational-wave
echoes from exotic compact objects. A binary black-hole merger spacetime can be
divided by a time-like hypersurface into a Black-Hole Perturbation (BHP)
region, in... | [
{
"created": "Mon, 7 Mar 2022 06:56:42 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Apr 2022 18:35:35 GMT",
"version": "v2"
}
] | 2022-05-06 | [
[
"Ma",
"Sizheng",
""
],
[
"Wang",
"Qingwen",
""
],
[
"Deppe",
"Nils",
""
],
[
"Hébert",
"François",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Moxon",
"Jordan",
""
],
[
"Throwe",
"William",
""
],
[
"V... | We propose a new approach toward reconstructing the late-time near-horizon geometry of merging binary black holes, and toward computing gravitational-wave echoes from exotic compact objects. A binary black-hole merger spacetime can be divided by a time-like hypersurface into a Black-Hole Perturbation (BHP) region, in w... |
1708.08125 | Kirill Bronnikov | K.A. Bronnikov | Dyonic configurations in nonlinear electrodynamics coupled to general
relativity | 6 two-column pages, no figures | Grav. Cosmol. 23, 343-348 (2017) | 10.1134/S0202289317040053 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider static, spherically symmetric configurations in general
relativity, supported by nonlinear electromagnetic fields with gauge-invariant
Lagrangians depending on the single invariant $f = F_{\mu\nu} F^{\mu\nu}$.
After a brief review on black hole (BH) and solitonic solutions, obtained so
far with pure elect... | [
{
"created": "Sun, 27 Aug 2017 19:15:19 GMT",
"version": "v1"
}
] | 2020-10-20 | [
[
"Bronnikov",
"K. A.",
""
]
] | We consider static, spherically symmetric configurations in general relativity, supported by nonlinear electromagnetic fields with gauge-invariant Lagrangians depending on the single invariant $f = F_{\mu\nu} F^{\mu\nu}$. After a brief review on black hole (BH) and solitonic solutions, obtained so far with pure electri... |
2404.18811 | Christian Pfeifer | Manuel Hohmann, Christian Pfeifer, Fabian Wagner | Weak equivalence principle and nonrelativistic limit of general
dispersion relations | 18 pages | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the weak equivalence principle in the context of modified dispersion
relations, a prevalent approach to quantum gravity phenomenology. We find that
generic modified dispersion relations violate the weak equivalence principle.
The acceleration in general depends on the mass of the test body, unless the
Hamilt... | [
{
"created": "Mon, 29 Apr 2024 15:48:49 GMT",
"version": "v1"
}
] | 2024-04-30 | [
[
"Hohmann",
"Manuel",
""
],
[
"Pfeifer",
"Christian",
""
],
[
"Wagner",
"Fabian",
""
]
] | We study the weak equivalence principle in the context of modified dispersion relations, a prevalent approach to quantum gravity phenomenology. We find that generic modified dispersion relations violate the weak equivalence principle. The acceleration in general depends on the mass of the test body, unless the Hamilton... |
2005.10871 | Demosthenes Kivotides | Demosthenes Kivotides | Gravitomagnetic relativistic effects on turbulence | 17 pages, 5 figures | International Journal of Modern Physics C (2021) | 10.1142/S0129183121501291 | null | gr-qc physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of fluid-matter under the influence of gravitomagnetic fields
are formulated and solved for the case of fully developed turbulence.
Gravitomagnetic effects reduce the vortical complexity and nonlinearity of
turbulence, even leading to its extinction within large volumes, and generate
departures from Kolm... | [
{
"created": "Thu, 21 May 2020 19:43:59 GMT",
"version": "v1"
}
] | 2021-04-29 | [
[
"Kivotides",
"Demosthenes",
""
]
] | The dynamics of fluid-matter under the influence of gravitomagnetic fields are formulated and solved for the case of fully developed turbulence. Gravitomagnetic effects reduce the vortical complexity and nonlinearity of turbulence, even leading to its extinction within large volumes, and generate departures from Kolmog... |
2207.09641 | Chae-Min Yun | Chae-min Yun, Jubin Park, Myung-Ki Cheoun and Dukjae Jang | An exact solution of the higher-order gravity in standard
radiation-dominated era | null | null | 10.1016/j.physletb.2022.137652 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report that the standard evolution of radiation-dominated era (RDE)
universe $a \propto t^{1/2}$ is a sufficient condition for solving a sixth
order gravitational field equation derived from the Lagrangian containing $B
R^{ab}R_{ab} + C R {R^{;c}}_{c}$ as well as a polynomial $f(R)$ for a spatially
flat radiation ... | [
{
"created": "Wed, 20 Jul 2022 04:05:53 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2022 01:35:24 GMT",
"version": "v2"
},
{
"created": "Fri, 30 Sep 2022 03:59:46 GMT",
"version": "v3"
},
{
"created": "Mon, 2 Jan 2023 08:27:57 GMT",
"version": "v4"
}
] | 2023-01-04 | [
[
"Yun",
"Chae-min",
""
],
[
"Park",
"Jubin",
""
],
[
"Cheoun",
"Myung-Ki",
""
],
[
"Jang",
"Dukjae",
""
]
] | We report that the standard evolution of radiation-dominated era (RDE) universe $a \propto t^{1/2}$ is a sufficient condition for solving a sixth order gravitational field equation derived from the Lagrangian containing $B R^{ab}R_{ab} + C R {R^{;c}}_{c}$ as well as a polynomial $f(R)$ for a spatially flat radiation FL... |
gr-qc/9811062 | Cenalo T. A. Vaz | Cenalo Vaz (U. do Algarve) and Louis Witten (U. of Cincinnati) | Mass Quantization of the Schwarzschild Black Hole | Change in eq. (13). Factors of 4 cleaned up. Refs. added | Phys.Rev. D60 (1999) 024009 | 10.1103/PhysRevD.60.024009 | UATP/9807 | gr-qc hep-th | null | We examine the Wheeler-DeWitt equaton for a static, eternal Schwarzschild
black hole in Kucha\v r-Brown variables and obtain its energy eigenstates.
Consistent solutions vanish in the exterior of the Kruskal manifold and are
non-vanishing only in the interior. The system is reminiscent of a particle in
a box. States ... | [
{
"created": "Wed, 18 Nov 1998 21:30:38 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Nov 1998 19:06:08 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Vaz",
"Cenalo",
"",
"U. do Algarve"
],
[
"Witten",
"Louis",
"",
"U. of Cincinnati"
]
] | We examine the Wheeler-DeWitt equaton for a static, eternal Schwarzschild black hole in Kucha\v r-Brown variables and obtain its energy eigenstates. Consistent solutions vanish in the exterior of the Kruskal manifold and are non-vanishing only in the interior. The system is reminiscent of a particle in a box. States of... |
1402.2063 | Megandhren Govender | M. Govender | Non-adiabatic spherical collapse with a two-fluid atmosphere | 12 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we present an exact model of a spherically symmetric star
undergoing dissipative collapse in the form of a radial heat flux. The interior
of the star is matched smoothly to the generalised Vaidya line element
representing a two-fluid atmosphere comprising null radiation and a string
fluid. The influence ... | [
{
"created": "Mon, 10 Feb 2014 08:18:19 GMT",
"version": "v1"
}
] | 2014-02-11 | [
[
"Govender",
"M.",
""
]
] | In this work we present an exact model of a spherically symmetric star undergoing dissipative collapse in the form of a radial heat flux. The interior of the star is matched smoothly to the generalised Vaidya line element representing a two-fluid atmosphere comprising null radiation and a string fluid. The influence of... |
gr-qc/0211036 | Zoltan Perjes | Zolt\'an Perj\'es and M\'aty\'as Vas\'uth | Charged black holes: Wave equations for gravitational and
electromagnetic perturbations | 12 pages, to appear in Ap.J | Astrophys.J. 582 (2003) 342-346 | 10.1086/344572 | null | gr-qc astro-ph | null | A pair of wave equations for the electromagnetic and gravitational
perturbations of the charged Kerr black hole are derived. The perturbed
Einstein-Maxwell equations in a new gauge are employed in the derivation. The
wave equations refer to the perturbed Maxwell spinor $\Phi_0$ and to the shear
$\sigma$ of a principa... | [
{
"created": "Mon, 11 Nov 2002 14:30:03 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Perjés",
"Zoltán",
""
],
[
"Vasúth",
"Mátyás",
""
]
] | A pair of wave equations for the electromagnetic and gravitational perturbations of the charged Kerr black hole are derived. The perturbed Einstein-Maxwell equations in a new gauge are employed in the derivation. The wave equations refer to the perturbed Maxwell spinor $\Phi_0$ and to the shear $\sigma$ of a principal ... |
gr-qc/0510050 | Sergei Alexandrov | Sergei Alexandrov | Reality conditions for Ashtekar gravity from Lorentz-covariant
formulation | 14 pages | Class.Quant.Grav. 23 (2006) 1837-1850 | 10.1088/0264-9381/23/6/002 | ITP-UU-05/45, SPIN-05/31 | gr-qc | null | We show the equivalence of the Lorentz-covariant canonical formulation
considered for the Immirzi parameter $\beta=i$ to the selfdual Ashtekar
gravity. We also propose to deal with the reality conditions in terms of Dirac
brackets derived from the covariant formulation and defined on an extended
phase space which inv... | [
{
"created": "Mon, 10 Oct 2005 15:56:41 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Alexandrov",
"Sergei",
""
]
] | We show the equivalence of the Lorentz-covariant canonical formulation considered for the Immirzi parameter $\beta=i$ to the selfdual Ashtekar gravity. We also propose to deal with the reality conditions in terms of Dirac brackets derived from the covariant formulation and defined on an extended phase space which invol... |
1609.01340 | Carlos A. R. Herdeiro | P. V. P. Cunha, J. Grover, C. Herdeiro, E. Radu, H. Runarsson, A.
Wittig | Chaotic lensing around boson stars and Kerr black holes with scalar hair | 43 pages, 22 figures | Phys. Rev. D 94, 104023 (2016) | 10.1103/PhysRevD.94.104023 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent letter, arXiv:1509.00021, it was shown that the lensing of light
around rotating boson stars and Kerr black holes with scalar hair can exhibit
chaotic patterns. Since no separation of variables is known (or expected) for
geodesic motion on these backgrounds, we examine the 2D effective potentials
for phot... | [
{
"created": "Mon, 5 Sep 2016 22:12:58 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Cunha",
"P. V. P.",
""
],
[
"Grover",
"J.",
""
],
[
"Herdeiro",
"C.",
""
],
[
"Radu",
"E.",
""
],
[
"Runarsson",
"H.",
""
],
[
"Wittig",
"A.",
""
]
] | In a recent letter, arXiv:1509.00021, it was shown that the lensing of light around rotating boson stars and Kerr black holes with scalar hair can exhibit chaotic patterns. Since no separation of variables is known (or expected) for geodesic motion on these backgrounds, we examine the 2D effective potentials for photon... |
1406.3712 | Behrouz Mirza | Fatemeh Lalehgani Dezaki, Behrouz Mirza | Generalized entropies and the expansion law of the universe | 7 pages | Gen Relativ Gravit (2015) 47:67 | 10.1007/s10714-015-1910-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We suggest that using the first law of thermodynamics is a convenient method
to obtain a correct form of the expansion law of the universe \cite{T.
Padmanabhan1}. We will, then, use this idea to obtain the expansion law for a
Kodama observer. By using the expansion law for a Kodama observer, we can
obtain the dynamic... | [
{
"created": "Sat, 14 Jun 2014 10:21:24 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Jul 2015 08:46:11 GMT",
"version": "v2"
}
] | 2015-07-07 | [
[
"Dezaki",
"Fatemeh Lalehgani",
""
],
[
"Mirza",
"Behrouz",
""
]
] | We suggest that using the first law of thermodynamics is a convenient method to obtain a correct form of the expansion law of the universe \cite{T. Padmanabhan1}. We will, then, use this idea to obtain the expansion law for a Kodama observer. By using the expansion law for a Kodama observer, we can obtain the dynamic e... |
gr-qc/9506059 | null | Vicente Pleitez | Concerning the vacuum velocity of gravitational waves | 6 pages, REVTEX | null | null | IFT-P.031/95 | gr-qc | null | It is pointed out that if gravitational interactions among ordinary bodies
propagate in extra space-time dimensions the velocity of gravitational waves in
vacuum could be different from the speed of light $c$.
| [
{
"created": "Tue, 27 Jun 1995 14:11:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pleitez",
"Vicente",
""
]
] | It is pointed out that if gravitational interactions among ordinary bodies propagate in extra space-time dimensions the velocity of gravitational waves in vacuum could be different from the speed of light $c$. |
gr-qc/0411059 | Roman Konoplya | R.A. Konoplya and A.V. Zhidenko | Decay of massive scalar field in a Schwarzschild background | 8 pages, 3 figures, Physics Letters B, at press | Phys.Lett. B609 (2005) 377-384 | 10.1016/j.physletb.2005.01.078 | null | gr-qc | null | The decay of massive scalar field in the Schwarzschild black hole background
is investigated here by consideration its quasinormal spectrum. It has been
proved that the so-called $quasi-resonant$ modes, which are arbitrary long
living (purely real) modes, can exist only if the effective potential is not
zero at least... | [
{
"created": "Thu, 11 Nov 2004 19:50:05 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Feb 2005 16:51:02 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A. V.",
""
]
] | The decay of massive scalar field in the Schwarzschild black hole background is investigated here by consideration its quasinormal spectrum. It has been proved that the so-called $quasi-resonant$ modes, which are arbitrary long living (purely real) modes, can exist only if the effective potential is not zero at least a... |
0808.3575 | Jose' P. S. Lemos | Gon\c{c}alo A. S. Dias, Jos\'e P. S. Lemos | Hamiltonian thermodynamics of charged three-dimensional dilatonic black
holes | 38 pages, 3 figures | Phys.Rev.D78:084020,2008 | 10.1103/PhysRevD.78.084020 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The action for a class of three-dimensional dilaton-gravity theories, with an
electromagnetic Maxwell field and a cosmological constant, can be recast in a
Brans-Dicke-Maxwell type action, with its free $\omega$ parameter. For a
negative cosmological constant, these theories have static, electrically
charged, and sph... | [
{
"created": "Tue, 26 Aug 2008 19:48:56 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Aug 2008 20:16:04 GMT",
"version": "v2"
}
] | 2009-02-23 | [
[
"Dias",
"Gonçalo A. S.",
""
],
[
"Lemos",
"José P. S.",
""
]
] | The action for a class of three-dimensional dilaton-gravity theories, with an electromagnetic Maxwell field and a cosmological constant, can be recast in a Brans-Dicke-Maxwell type action, with its free $\omega$ parameter. For a negative cosmological constant, these theories have static, electrically charged, and spher... |
2207.03125 | Josu Aurrekoetxea | Josu C. Aurrekoetxea, Katy Clough, Eugene A. Lim | CTTK: A new method to solve the initial data constraints in numerical
relativity | 14 pages, 4 figures, 1 appendix. Matches version published in CQG | null | 10.1088/1361-6382/acb883 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In numerical relativity simulations with non-trivial matter configurations,
one must solve the Hamiltonian and momentum constraints of the ADM formulation
for the metric variables in the initial data. We introduce a new scheme based
on the standard Conformal Transverse-Traceless (CTT) decomposition, in which
instead ... | [
{
"created": "Thu, 7 Jul 2022 07:11:02 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Mar 2023 14:14:00 GMT",
"version": "v2"
}
] | 2023-03-15 | [
[
"Aurrekoetxea",
"Josu C.",
""
],
[
"Clough",
"Katy",
""
],
[
"Lim",
"Eugene A.",
""
]
] | In numerical relativity simulations with non-trivial matter configurations, one must solve the Hamiltonian and momentum constraints of the ADM formulation for the metric variables in the initial data. We introduce a new scheme based on the standard Conformal Transverse-Traceless (CTT) decomposition, in which instead of... |
1109.5501 | Wei-Tou Ni | Wei-Tou Ni | Foundations of Electromagnetism, Equivalence Principles and Cosmic
Interactions | 25 pages, 4 figures, 2 pages, it is written as a chapter for the book
"Electromagnetism" (ISBN 979-953-307-400-8) to be published by INTECH (open
access), December, 2011 | Trends in Electromagnetism - From Fundamentals to Applications
(March, 2012), InTech, pp. 45-68 | null | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We look at the foundations of electromagnetism in this chapter of the
"eletromagnetism" book. For doing this, after some review (constraints on
photon mass etc.), we use two approaches. The first one is to formulate a
Parametrized Post-Maxwellian framework to include QED corrections and a
pseudoscalar photon interact... | [
{
"created": "Mon, 26 Sep 2011 09:30:07 GMT",
"version": "v1"
}
] | 2012-03-26 | [
[
"Ni",
"Wei-Tou",
""
]
] | We look at the foundations of electromagnetism in this chapter of the "eletromagnetism" book. For doing this, after some review (constraints on photon mass etc.), we use two approaches. The first one is to formulate a Parametrized Post-Maxwellian framework to include QED corrections and a pseudoscalar photon interactio... |
1603.06039 | Xin-Zhou Li | Ping Li, Xin-zhou Li and Ping Xi | Black hole solutions in de Rham-Gabadadze-Tolley massive gravity | 12pages, no figure | Phys. Rev. D 93, 064040 (2016) | 10.1103/PhysRevD.93.064040 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a detailed study of the static spherically symmetric solutions in
de Rham-Gabadadze-Tolley (dRGT) theory. Since the diffeomorphism invariance can
be restored by introducing the St\"{u}ckelberg fields $\phi^a$, there is new
invariant $I^{ab}=g^{\mu\nu}\partial_{\mu}\phi^a\partial_\nu\phi^b$ in the
massive g... | [
{
"created": "Sat, 19 Mar 2016 03:40:05 GMT",
"version": "v1"
}
] | 2016-04-13 | [
[
"Li",
"Ping",
""
],
[
"Li",
"Xin-zhou",
""
],
[
"Xi",
"Ping",
""
]
] | We present a detailed study of the static spherically symmetric solutions in de Rham-Gabadadze-Tolley (dRGT) theory. Since the diffeomorphism invariance can be restored by introducing the St\"{u}ckelberg fields $\phi^a$, there is new invariant $I^{ab}=g^{\mu\nu}\partial_{\mu}\phi^a\partial_\nu\phi^b$ in the massive gra... |
1507.08496 | Shahram Panahiyan | S. H. Hendi, S. Panahiyan, R. Mamasani | Thermodynamic stability of charged BTZ black holes: Ensemble dependency
problem and its solution | 20 pages and 15 figures | Gen. Relativ. Gravit. 47, 91 (2015) | 10.1007/s10714-015-1932-2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the wide applications of thermal stability and phase transition,
we investigate thermodynamic properties of charged BTZ black holes. We apply
the standard method to calculate the heat capacity and the Hessian matrix and
find that thermal stability of charged BTZ solutions depends on the choice of
ensembl... | [
{
"created": "Tue, 28 Jul 2015 09:28:56 GMT",
"version": "v1"
}
] | 2015-11-25 | [
[
"Hendi",
"S. H.",
""
],
[
"Panahiyan",
"S.",
""
],
[
"Mamasani",
"R.",
""
]
] | Motivated by the wide applications of thermal stability and phase transition, we investigate thermodynamic properties of charged BTZ black holes. We apply the standard method to calculate the heat capacity and the Hessian matrix and find that thermal stability of charged BTZ solutions depends on the choice of ensemble.... |
0910.5295 | Ali Shojai | A. Shojai and F. Shojai | Statefinder diagnosis of nearly flat and thawing non-minimal
quintessence | 8 figures. To appear in Euro. Phys. Lett. 2009 | Europhys.Lett.88:30002,2009 | 10.1209/0295-5075/88/30002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Non-minimally coupled scalar field models of dark energy are equivalent to an
interacting quintessence in the Einstein's frame. Considering two special
important choices of the potential of the scalar field, i.e. nearly flat and
thawing potential, one has an analytical expression for the equation of state
parameter a... | [
{
"created": "Wed, 28 Oct 2009 05:25:21 GMT",
"version": "v1"
}
] | 2010-05-27 | [
[
"Shojai",
"A.",
""
],
[
"Shojai",
"F.",
""
]
] | Non-minimally coupled scalar field models of dark energy are equivalent to an interacting quintessence in the Einstein's frame. Considering two special important choices of the potential of the scalar field, i.e. nearly flat and thawing potential, one has an analytical expression for the equation of state parameter as ... |
gr-qc/0511074 | Ricardo E. Gamboa Saravi | Ricardo E. Gamboa Saravi | The white wall, a gravitational mirror | 8 pages, 1 figure, final version | Int.J.Mod.Phys.A23:1995-2003,2008 | 10.1142/S0217751X08039864 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe the exact solution of Einstein's equation corresponding to a
static homogenous distribution of matter with plane symmetry lying below $z=0$.
We study the geodesics in it and we show that this simple spacetime exhibits
very curious properties. In particular, it has a repelling singular boundary
and all geo... | [
{
"created": "Mon, 14 Nov 2005 15:07:27 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Mar 2006 15:46:36 GMT",
"version": "v2"
},
{
"created": "Mon, 16 Jul 2007 17:22:16 GMT",
"version": "v3"
},
{
"created": "Wed, 6 Feb 2008 14:00:25 GMT",
"version": "v4"
},
{
"cre... | 2008-11-26 | [
[
"Saravi",
"Ricardo E. Gamboa",
""
]
] | We describe the exact solution of Einstein's equation corresponding to a static homogenous distribution of matter with plane symmetry lying below $z=0$. We study the geodesics in it and we show that this simple spacetime exhibits very curious properties. In particular, it has a repelling singular boundary and all geode... |
gr-qc/9510023 | Donald Marolf | Donald Marolf | Mass Superselection, Canonical Gauge Transformations, and Asymptotically
Flat Variational Principles | 15 pages, ReVTeX, Minor changes made in response to referee's
commments | Class.Quant.Grav. 13 (1996) 1871-1884 | 10.1088/0264-9381/13/7/017 | UCSBTH-95-25 | gr-qc | null | The phase space reduction of Schwarzschild black holes by Thiemann and
Kastrup and by Kucha\v{r} is reexamined from a different perspective on gauge
freedom. This perspective introduces additional gauge transformations which
correspond to asymptotically nontrivial diffeomorphisms. Various subtleties
concerning variat... | [
{
"created": "Thu, 12 Oct 1995 22:57:01 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Nov 1995 23:51:30 GMT",
"version": "v2"
},
{
"created": "Tue, 28 Nov 1995 00:58:53 GMT",
"version": "v3"
},
{
"created": "Wed, 3 Apr 1996 18:06:27 GMT",
"version": "v4"
}
] | 2009-10-28 | [
[
"Marolf",
"Donald",
""
]
] | The phase space reduction of Schwarzschild black holes by Thiemann and Kastrup and by Kucha\v{r} is reexamined from a different perspective on gauge freedom. This perspective introduces additional gauge transformations which correspond to asymptotically nontrivial diffeomorphisms. Various subtleties concerning variatio... |
gr-qc/0507127 | Filimonova Irina V | D.J. Cirilo Lombardo | Nonlinear monopole, regularity conditions and the electromagnetic mass
in Einstein-Born-Infeld theories | Plenary talk presented at Workshop on High Energy Physics&Field
Theory (Protvino, Russia, 2004) | null | null | HEPFT/2004/8 | gr-qc | null | In this work a new asymptotically flat solution of the coupled
Einstein-Born-Infeld equations for a static spherically symmetric space-time is
obtained. When the intrinsic mass is zero the resulting spacetime is regular
everywhere, in the sense given by B. Hoffmann and L. Infeld in 1937, and the
Einstein-Born-Infeld ... | [
{
"created": "Fri, 29 Jul 2005 07:04:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lombardo",
"D. J. Cirilo",
""
]
] | In this work a new asymptotically flat solution of the coupled Einstein-Born-Infeld equations for a static spherically symmetric space-time is obtained. When the intrinsic mass is zero the resulting spacetime is regular everywhere, in the sense given by B. Hoffmann and L. Infeld in 1937, and the Einstein-Born-Infeld th... |
0709.1005 | Roberto A. Sussman | Roberto A. Sussman | A dynamical system approach to inhomogeneous dust solutions | Enhanced version accepted for publication in Classical and Quantum
Gravity. Compiled with PdfLatex. RevTex style, 18 pdf figures | Class.Quant.Grav.25:015012,2008 | 10.1088/0264-9381/25/1/015012 | null | gr-qc astro-ph math.DS nlin.SI | null | We examine numerically and qualitatively the Lema\^\i tre--Tolman--Bondi
(LTB) inhomogeneous dust solutions as a 3--dimensional dynamical system
characterized by six critical points. One of the coordinates of the phase space
is an average density parameter, $<\Omega>$, which behaves as the ordinary
$\Omega$ in Friedm... | [
{
"created": "Fri, 7 Sep 2007 06:25:23 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Nov 2007 21:23:21 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Sussman",
"Roberto A.",
""
]
] | We examine numerically and qualitatively the Lema\^\i tre--Tolman--Bondi (LTB) inhomogeneous dust solutions as a 3--dimensional dynamical system characterized by six critical points. One of the coordinates of the phase space is an average density parameter, $<\Omega>$, which behaves as the ordinary $\Omega$ in Friedman... |
2112.15077 | Yang Liu | Yang Liu | Non-extensive Statistical Mechanics and the Thermodynamic Stability of
FRW Universe | null | EPL 2021 | 10.1209/0295-5075/ac3f52 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this article, we investigate the thermodynamic stability of the FRW
universe for two examples, Tsallis entropy and loop quantum gravity, by
considering non-extensive statistical mechanics. The heat capacity, free energy
and pressure of the universe are obtained. For the Tsallis entropy model, we
obtained the const... | [
{
"created": "Thu, 30 Dec 2021 14:41:35 GMT",
"version": "v1"
}
] | 2022-01-03 | [
[
"Liu",
"Yang",
""
]
] | In this article, we investigate the thermodynamic stability of the FRW universe for two examples, Tsallis entropy and loop quantum gravity, by considering non-extensive statistical mechanics. The heat capacity, free energy and pressure of the universe are obtained. For the Tsallis entropy model, we obtained the constra... |
gr-qc/0511098 | Chen Songbai | Songbai Chen and Jiliang Jing | Late-time tail of a coupled scalar field in the background of a black
hole with a global monopole | 12 pages, A corrected version to be appeared in MPLA | Mod.Phys.Lett.A23:359-369,2008 | 10.1142/S0217732308023888 | null | gr-qc | null | Using the technique of spectral decomposition, we investigated the late-time
tails of massless and massive coupled scalar fields in the background of a
black hole with a global monopole. We found that due to existence of the
coupling between the scalar and gravitational fields, the massless scalar field
decay faster ... | [
{
"created": "Thu, 17 Nov 2005 08:23:39 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Feb 2008 08:42:49 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | Using the technique of spectral decomposition, we investigated the late-time tails of massless and massive coupled scalar fields in the background of a black hole with a global monopole. We found that due to existence of the coupling between the scalar and gravitational fields, the massless scalar field decay faster at... |
1904.10407 | Mikica Kocic | Mikica Kocic | Note on bimetric causal diagrams | 3 pages, 4 figures, 1 table, Brief technical note | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new kind of diagrams is presented, showing the causal structure of bimetric
interactions.
| [
{
"created": "Tue, 23 Apr 2019 16:24:55 GMT",
"version": "v1"
}
] | 2019-04-24 | [
[
"Kocic",
"Mikica",
""
]
] | A new kind of diagrams is presented, showing the causal structure of bimetric interactions. |
0712.1796 | Viktor Toth | J. W. Moffat and V. T. Toth | Fundamental parameter-free solutions in Modified Gravity | 11 pages, 8 figures; accepted for publication in CQG | Class. Quantum Grav. 26 (2009) 085002 | 10.1088/0264-9381/26/8/085002 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified Gravity (MOG) has been used successfully to explain the rotation
curves of galaxies, the motion of galaxy clusters, the Bullet Cluster, and
cosmological observations without the use of dark matter or Einstein's
cosmological constant. We now have the ability to demonstrate how these
solutions can be obtained ... | [
{
"created": "Tue, 11 Dec 2007 19:19:03 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Jan 2008 20:11:52 GMT",
"version": "v2"
},
{
"created": "Mon, 5 May 2008 22:46:33 GMT",
"version": "v3"
},
{
"created": "Sun, 1 Jun 2008 17:24:47 GMT",
"version": "v4"
},
{
"crea... | 2009-04-04 | [
[
"Moffat",
"J. W.",
""
],
[
"Toth",
"V. T.",
""
]
] | Modified Gravity (MOG) has been used successfully to explain the rotation curves of galaxies, the motion of galaxy clusters, the Bullet Cluster, and cosmological observations without the use of dark matter or Einstein's cosmological constant. We now have the ability to demonstrate how these solutions can be obtained di... |
1002.3057 | Jan Steinhoff | J. Steinhoff, S. Hergt, G. Sch\"afer | ADM canonical formulation with spin and application to post-Newtonian
approximations | 4 pages, Proceedings of the 12th Marcel Grossman Meeting | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, different methods succeeded in calculating the spin dynamics at
higher orders in the post-Newtonian (PN) approximation. This is an essential
step toward the determination of more accurate templates for gravitational
waves, to be used in future gravitational wave astronomy. We focus on the
extension of the A... | [
{
"created": "Tue, 16 Feb 2010 12:04:29 GMT",
"version": "v1"
}
] | 2010-02-17 | [
[
"Steinhoff",
"J.",
""
],
[
"Hergt",
"S.",
""
],
[
"Schäfer",
"G.",
""
]
] | Recently, different methods succeeded in calculating the spin dynamics at higher orders in the post-Newtonian (PN) approximation. This is an essential step toward the determination of more accurate templates for gravitational waves, to be used in future gravitational wave astronomy. We focus on the extension of the ADM... |
1312.4103 | Yi Xie | Yi Xie and Xue-Mei Deng | $f(T)$ gravity: effects on astronomical observation and Solar System
experiments and upper-bounds | 6 pages | MNRAS (August 21, 2013) 433 (4): 3584-3589 | 10.1093/mnras/stt991 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As an extension of a previous work in which perihelion advances are
considered only and as an attempt to find more stringent constraints on its
parameters, we investigate effects on astronomical observation and experiments
conducted in the Solar System due to the $f(T)$ gravity which contains a
quadratic correction o... | [
{
"created": "Sun, 15 Dec 2013 02:56:37 GMT",
"version": "v1"
}
] | 2013-12-17 | [
[
"Xie",
"Yi",
""
],
[
"Deng",
"Xue-Mei",
""
]
] | As an extension of a previous work in which perihelion advances are considered only and as an attempt to find more stringent constraints on its parameters, we investigate effects on astronomical observation and experiments conducted in the Solar System due to the $f(T)$ gravity which contains a quadratic correction of ... |
2002.08844 | M. Farasat Shamir | M. Farasat Shamir | $f(\mathcal{R},\varphi,\chi)$ Cosmology with Noether Symmetry | 11 pages, 3 figures | Eur. Phys. J. C 80 (2020) 115 | 10.1140/epjc/s10052-020-7682-7 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This paper is devoted to explore modified $f(\mathcal{R})$ theories of
gravity using Noether symmetry approach. For this purpose,
Friedmann-Robertson-Walker spacetime is chosen to investigate the cosmic
evolution. The study is mainly divided into two parts: Firstly Noether
symmetries of metric $f(\mathcal{R})$ gravit... | [
{
"created": "Tue, 18 Feb 2020 04:10:53 GMT",
"version": "v1"
}
] | 2020-02-21 | [
[
"Shamir",
"M. Farasat",
""
]
] | This paper is devoted to explore modified $f(\mathcal{R})$ theories of gravity using Noether symmetry approach. For this purpose, Friedmann-Robertson-Walker spacetime is chosen to investigate the cosmic evolution. The study is mainly divided into two parts: Firstly Noether symmetries of metric $f(\mathcal{R})$ gravity ... |
1706.09505 | Liudmila Fesik Ms | Liudmila Fesik | Polarization states of gravitational waves detected by LIGO-Virgo
antennas | 45 pages, Master thesis | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of the first gravitational wave events by the Advanced LIGO
Scientific Collaboration has opened a new possibility for the study of
fundamental physics of gravitational interaction.
This work conducts an analysis of possible polarization states of
gravitational waves (GW) radiated by the most promising... | [
{
"created": "Wed, 28 Jun 2017 22:41:55 GMT",
"version": "v1"
}
] | 2017-06-30 | [
[
"Fesik",
"Liudmila",
""
]
] | The detection of the first gravitational wave events by the Advanced LIGO Scientific Collaboration has opened a new possibility for the study of fundamental physics of gravitational interaction. This work conducts an analysis of possible polarization states of gravitational waves (GW) radiated by the most promising typ... |
2006.16430 | Jose Wadih Maluf Dr. | J. W. Maluf | Distorted Torsion Tensor, Teleparallelism and Spin 2 Field Equations | 13 pages, no figures. A third model is presented, which yields field
equations that are symmetric and invariant under local Lorentz
transformations | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A notion of distorted torsion tensor was introduced by Okubo, in the
establishment of the Nijenhuis-Bianchi identity and of BRST-like operators.
These quantities are constructed with the help of the Nijenhuis tensor, which
in turn is defined in terms of a (1,1) tensor $S^\lambda_\mu$. This tensor
enters the construct... | [
{
"created": "Mon, 29 Jun 2020 23:12:39 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jul 2020 16:40:04 GMT",
"version": "v2"
}
] | 2020-07-08 | [
[
"Maluf",
"J. W.",
""
]
] | A notion of distorted torsion tensor was introduced by Okubo, in the establishment of the Nijenhuis-Bianchi identity and of BRST-like operators. These quantities are constructed with the help of the Nijenhuis tensor, which in turn is defined in terms of a (1,1) tensor $S^\lambda_\mu$. This tensor enters the constructio... |
2003.14206 | Rabia Saleem | R. Saleem and M. Zubair | Inflationary Solution of Hamilton Jacobi Equations during Weak
Dissipative Regime | 22 pages, 4 figures | Phys. Scr. 95(2020)035214 | 10.1088/1402-4896/ab4954 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, an elegant mathematical approach is introduced to solve the
equations of warm inflationary model without using extra approximations other
than slow-roll. This important inflationary method known as Hamilton-Jacobian
formalism. Here tachyon field and the imperfect fluid are considered to be the
cosmic i... | [
{
"created": "Sun, 29 Mar 2020 13:40:05 GMT",
"version": "v1"
}
] | 2020-04-08 | [
[
"Saleem",
"R.",
""
],
[
"Zubair",
"M.",
""
]
] | In this paper, an elegant mathematical approach is introduced to solve the equations of warm inflationary model without using extra approximations other than slow-roll. This important inflationary method known as Hamilton-Jacobian formalism. Here tachyon field and the imperfect fluid are considered to be the cosmic ing... |
gr-qc/9812066 | Garcia | L.C.Garcia de Andrade | Chern-Simons electrodynamics in (2+1)-spacetime with torsion | 5 pages latex | null | null | null | gr-qc | null | Chern-Simons electrodynamics in 2+1-spacetimes with torsion is investigated.
We start from the usual Chern-Simons (CS) electrodynamics Lagrangian and Cartan
torsion is introduced in the covariant derivative and by a direct coupling of
torsion vector to the CS field. Variation of the Lagrangian with respect to
torsion... | [
{
"created": "Fri, 18 Dec 1998 03:07:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Andrade",
"L. C. Garcia",
""
]
] | Chern-Simons electrodynamics in 2+1-spacetimes with torsion is investigated. We start from the usual Chern-Simons (CS) electrodynamics Lagrangian and Cartan torsion is introduced in the covariant derivative and by a direct coupling of torsion vector to the CS field. Variation of the Lagrangian with respect to torsion s... |
gr-qc/9710038 | Luc Blanchet | Luc Blanchet | Gravitational-wave tails of tails | Contains 2 files: a tex file B98tailgrqc.tex and a latex file
tabtail.tex. This version includes the correction of an Erratum to appear in
Classical and Quantum Gravity (2005) | Class.Quant.Grav.15:113-141,1998; Erratum-ibid.22:3381,2005 | 10.1088/0264-9381/15/1/009 | null | gr-qc | null | The tails of gravitational waves are caused by scattering of linear waves
onto the space-time curvature generated by the total mass-energy of the source.
Quite naturally, the tails of tails are caused by curvature scattering of the
tails of waves themselves. The tails of tails are associated with the cubic
non-linear... | [
{
"created": "Tue, 7 Oct 1997 10:02:11 GMT",
"version": "v1"
},
{
"created": "Fri, 27 May 2005 16:24:16 GMT",
"version": "v2"
}
] | 2011-08-11 | [
[
"Blanchet",
"Luc",
""
]
] | The tails of gravitational waves are caused by scattering of linear waves onto the space-time curvature generated by the total mass-energy of the source. Quite naturally, the tails of tails are caused by curvature scattering of the tails of waves themselves. The tails of tails are associated with the cubic non-linear i... |
gr-qc/9305010 | Dadhich | L. K. Patel and Naresh Dadhich | Singularity Free Inhomogeneous Models with Heat Flow | 6 pages, TeX, to appear in Class.Quant.Grav | Class.Quant.Grav.10:L85-L88,1993 | 10.1088/0264-9381/10/7/002 | null | gr-qc | null | We present a class of singularity free exact cosmological solutions of
Einstein's equations describing a perfect fluid with heat flow. It is obtained
as generalization of the Senovilla class [1] corresponding to incoherent
radiation field. The spacetime is cylindrically symmetric and globally regular.
| [
{
"created": "Wed, 12 May 1993 10:23:57 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Patel",
"L. K.",
""
],
[
"Dadhich",
"Naresh",
""
]
] | We present a class of singularity free exact cosmological solutions of Einstein's equations describing a perfect fluid with heat flow. It is obtained as generalization of the Senovilla class [1] corresponding to incoherent radiation field. The spacetime is cylindrically symmetric and globally regular. |
1511.04439 | Axel de la Macorra | Axel de la Macorra | Dark Energy Parametrization motivated by Scalar Field Dynamics | 23 pages, 15 figures. arXiv admin note: substantial text overlap with
arXiv:1108.0876 | null | 10.1088/0264-9381/33/9/095001 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new Dark Energy parametrization based on the dynamics of a
scalar field. We use an equation of state w=(x-1)/(x+1), with x=E_k/V, the
ratio of kinetic energy E_k=\dotphi^2/2 and potential V. The equation of motion
gives x=(L/6)(V/3H^2) and has a solution x=([(1+y)^2+2 L/3]^{1/2}-(1+y))/2
where y\equiv \r... | [
{
"created": "Thu, 12 Nov 2015 23:48:17 GMT",
"version": "v1"
}
] | 2016-04-27 | [
[
"de la Macorra",
"Axel",
""
]
] | We propose a new Dark Energy parametrization based on the dynamics of a scalar field. We use an equation of state w=(x-1)/(x+1), with x=E_k/V, the ratio of kinetic energy E_k=\dotphi^2/2 and potential V. The equation of motion gives x=(L/6)(V/3H^2) and has a solution x=([(1+y)^2+2 L/3]^{1/2}-(1+y))/2 where y\equiv \rmm... |
1704.05632 | Sergey Chervon | Sunil D. Maharaj, Aroonkumar Beesham, Sergey V. Chervon and Aleksandr
S. Kubasov | New Exact Solutions for a Chiral Cosmological Model in 5D EGB Gravity | 9 pages, the article is a reflection of the talk given at the
Ulyanovsk International School-Seminar "Problems of theoretical and
observation cosmology - UISS 2016", September 19-30, Ulyanovsk, Russia | null | 10.1134/S0202289317040120 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a chiral cosmological model in the framework of
Einstein-Gauss-Bonnet cosmology. Using a decomposition of the latter equations
in such a way that the first chiral field is responsible for the Einstein part
of the model, while the second field together with the kinetic interaction is
connected with the Gau... | [
{
"created": "Wed, 19 Apr 2017 07:10:56 GMT",
"version": "v1"
}
] | 2017-12-06 | [
[
"Maharaj",
"Sunil D.",
""
],
[
"Beesham",
"Aroonkumar",
""
],
[
"Chervon",
"Sergey V.",
""
],
[
"Kubasov",
"Aleksandr S.",
""
]
] | We consider a chiral cosmological model in the framework of Einstein-Gauss-Bonnet cosmology. Using a decomposition of the latter equations in such a way that the first chiral field is responsible for the Einstein part of the model, while the second field together with the kinetic interaction is connected with the Gauss... |
2206.14320 | Katsuki Aoki | Katsuki Aoki and Masato Minamitsuji | Resolving the pathologies of self-interacting Proca fields: A case study
of Proca stars | 14 pages, 7 figures, to appear in PRD | null | null | YITP-22-67 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been argued that a self-interacting massive vector field is
pathological due to a dynamical formation of a singular effective metric of the
vector field, which is the onset of a gradient or ghost instability. We discuss
that this singularity formation is not necessarily a fundamental problem but a
breakdown of... | [
{
"created": "Tue, 28 Jun 2022 23:09:44 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Sep 2022 07:43:39 GMT",
"version": "v2"
}
] | 2022-09-15 | [
[
"Aoki",
"Katsuki",
""
],
[
"Minamitsuji",
"Masato",
""
]
] | It has been argued that a self-interacting massive vector field is pathological due to a dynamical formation of a singular effective metric of the vector field, which is the onset of a gradient or ghost instability. We discuss that this singularity formation is not necessarily a fundamental problem but a breakdown of t... |
1404.1874 | Betti Hartmann | Yves Brihaye (Universite de Mons, Belgium), Betti Hartmann (IFSC,
Universidade de S\~ao Paulo, Brazil), J\"urgen Riedel (LABORES Paris, France) | Self-interacting boson stars with a single Killing vector field in
Anti-de Sitter | v5: 17 pages, 10 figures, matches version accepted for publication in
Phys. Rev. D | Phys. Rev. D 92, 044049 (2015) | 10.1103/PhysRevD.92.044049 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct rotating boson stars in (4+1)-dimensional asymptotically Anti-de
Sitter space-time (aAdS) with two equal angular momenta that are composed out
of a massive and self-interacting scalar field. These solutions possess a
single Killing vector field. We construct explicit solutions of the equations
in the cas... | [
{
"created": "Mon, 7 Apr 2014 18:18:25 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Apr 2014 17:31:16 GMT",
"version": "v2"
},
{
"created": "Wed, 2 Jul 2014 16:33:54 GMT",
"version": "v3"
},
{
"created": "Wed, 1 Apr 2015 23:28:35 GMT",
"version": "v4"
},
{
"crea... | 2015-09-02 | [
[
"Brihaye",
"Yves",
"",
"Universite de Mons, Belgium"
],
[
"Hartmann",
"Betti",
"",
"IFSC,\n Universidade de São Paulo, Brazil"
],
[
"Riedel",
"Jürgen",
"",
"LABORES Paris, France"
]
] | We construct rotating boson stars in (4+1)-dimensional asymptotically Anti-de Sitter space-time (aAdS) with two equal angular momenta that are composed out of a massive and self-interacting scalar field. These solutions possess a single Killing vector field. We construct explicit solutions of the equations in the case ... |
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