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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1005.3679 | Rolando Gaitan Deveras RGD | Rolando Gaitan Deveras | On unitarity of a Yang-Mills type formulation for massless and massive
gravity with propagating torsion | 28 p | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A perturbative regime based on contorsion as a dynamical variable and metric
as a (classical) fixed background, is performed in the context of a pure
Yang-Mills formulation based on $GL(3,R)$ gauge group. In the massless case we
show that the theory propagates three degrees of freedom and only one is a
non-unitary mo... | [
{
"created": "Thu, 20 May 2010 12:33:47 GMT",
"version": "v1"
}
] | 2010-05-21 | [
[
"Deveras",
"Rolando Gaitan",
""
]
] | A perturbative regime based on contorsion as a dynamical variable and metric as a (classical) fixed background, is performed in the context of a pure Yang-Mills formulation based on $GL(3,R)$ gauge group. In the massless case we show that the theory propagates three degrees of freedom and only one is a non-unitary mode... |
1409.4431 | Michael Boyle | Michael Boyle, Lawrence E. Kidder, Serguei Ossokine, and Harald P.
Pfeiffer | Gravitational-wave modes from precessing black-hole binaries | Updated a few URLs to point to the code accompanying the paper | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves from precessing black-hole binaries exhibit features that
are absent in nonprecessing systems. The most prominent of these is a
parity-violating asymmetry that beams energy and linear momentum preferentially
along or opposite to the orbital angular momentum, leading to recoil of the
binary. The as... | [
{
"created": "Mon, 15 Sep 2014 20:03:36 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Sep 2014 20:46:18 GMT",
"version": "v2"
}
] | 2014-09-24 | [
[
"Boyle",
"Michael",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Ossokine",
"Serguei",
""
],
[
"Pfeiffer",
"Harald P.",
""
]
] | Gravitational waves from precessing black-hole binaries exhibit features that are absent in nonprecessing systems. The most prominent of these is a parity-violating asymmetry that beams energy and linear momentum preferentially along or opposite to the orbital angular momentum, leading to recoil of the binary. The asym... |
1207.5241 | Shun-Pei Miao | S. P. Miao | Quantum Gravitational Effects on Massive Fermions during Inflation I | 81 pages, 3 figures, 42 tables, a modified version with several
references added. arXiv admin note: substantial text overlap with
arXiv:gr-qc/0511140 | Phys. Rev. D86 (2012) 104051 | 10.1103/PhysRevD.86.104051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the one loop graviton contribution to the self-energy of a very
light fermion on a locally de Sitter background. This result can be used to
study the effect that a small mass has on the propagation of fermions through
the sea of infrared gravitons generated by inflation. We employ dimensional
regularizatio... | [
{
"created": "Sun, 22 Jul 2012 16:49:16 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Dec 2012 23:05:39 GMT",
"version": "v2"
}
] | 2015-06-05 | [
[
"Miao",
"S. P.",
""
]
] | We compute the one loop graviton contribution to the self-energy of a very light fermion on a locally de Sitter background. This result can be used to study the effect that a small mass has on the propagation of fermions through the sea of infrared gravitons generated by inflation. We employ dimensional regularization ... |
gr-qc/9603031 | Douglas A. Singleton | Douglas Singleton | Yang-Mills Inspired Solutions for General Relativity | 13 pages LaTeX | Phys.Lett. A223 (1996) 12-18 | 10.1016/S0375-9601(96)00700-1 | null | gr-qc | null | Several exact, cylindrically symmetric solutions to Einstein's vacuum
equations are given. These solutions were found using the connection between
Yang-Mills theory and general relativity. Taking known solutions of the
Yang-Mills equations (e.g. the topological BPS monopole solutions) it is
possible to construct exac... | [
{
"created": "Thu, 21 Mar 1996 02:46:01 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Singleton",
"Douglas",
""
]
] | Several exact, cylindrically symmetric solutions to Einstein's vacuum equations are given. These solutions were found using the connection between Yang-Mills theory and general relativity. Taking known solutions of the Yang-Mills equations (e.g. the topological BPS monopole solutions) it is possible to construct exact ... |
2208.03629 | Xue Zheng Zhu | Xue-Zheng Zhu and Yang Yu and Xian Gao | Cosmological perturbations in the spatially covariant gravity with a
dynamical lapse function | null | Phys.Lett.B 833 (2022) 137356 | 10.1016/j.physletb.2022.137356 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the scalar perturbations in a class of spatially covariant
gravity theory with a dynamical lapse function.
Generally, there are two scalar degrees of freedom due to the presence of the
velocity of the lapse function.
We treat the scalar perturbations as analogues of those in a two-field
inflationar... | [
{
"created": "Sun, 7 Aug 2022 03:45:25 GMT",
"version": "v1"
}
] | 2022-08-10 | [
[
"Zhu",
"Xue-Zheng",
""
],
[
"Yu",
"Yang",
""
],
[
"Gao",
"Xian",
""
]
] | We investigate the scalar perturbations in a class of spatially covariant gravity theory with a dynamical lapse function. Generally, there are two scalar degrees of freedom due to the presence of the velocity of the lapse function. We treat the scalar perturbations as analogues of those in a two-field inflationary mode... |
2105.06223 | David McNutt | D. D. McNutt, A. A. Coley and R. J. van den Hoogen | Teleparallel geometries not characterized by their scalar polynomial
torsion invariants | 3o pages, 1 figure | Journal of Mathematical Physics, 62, 052501 (2021) | 10.1063/5.0051400 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A teleparallel geometry is an n-dimensional manifold equipped with a frame
basis and an independent spin connection. For such a geometry, the curvature
tensor vanishes and the torsion tensor is non-zero. A straightforward approach
to characterizing teleparallel geometries is to compute scalar polynomial
invariants co... | [
{
"created": "Thu, 13 May 2021 12:22:59 GMT",
"version": "v1"
}
] | 2021-05-14 | [
[
"McNutt",
"D. D.",
""
],
[
"Coley",
"A. A.",
""
],
[
"Hoogen",
"R. J. van den",
""
]
] | A teleparallel geometry is an n-dimensional manifold equipped with a frame basis and an independent spin connection. For such a geometry, the curvature tensor vanishes and the torsion tensor is non-zero. A straightforward approach to characterizing teleparallel geometries is to compute scalar polynomial invariants cons... |
gr-qc/0009069 | Tekin Dereli | H. Cebeci, T. Dereli (METU) | Conformal Black Hole Solutions of Axi-Dilaton Gravity in D-dimensions | 6 PAGES, Rev-tex file, no figures, to appear in Phys-Rev D | Phys.Rev. D65 (2002) 047501 | 10.1103/PhysRevD.65.047501 | null | gr-qc | null | Static, spherically symmetric solutions of axi-dilaton gravity in $D$
dimensions is given in the Brans-Dicke frame for arbitrary values of the
Brans-Dicke constant $\omega$ and an axion-dilaton coupling parameter $k$. The
mass and the dilaton and axion charges are determined and a BPS bound is
derived. There exists a... | [
{
"created": "Tue, 19 Sep 2000 15:39:43 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Sep 2001 19:11:13 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Cebeci",
"H.",
"",
"METU"
],
[
"Dereli",
"T.",
"",
"METU"
]
] | Static, spherically symmetric solutions of axi-dilaton gravity in $D$ dimensions is given in the Brans-Dicke frame for arbitrary values of the Brans-Dicke constant $\omega$ and an axion-dilaton coupling parameter $k$. The mass and the dilaton and axion charges are determined and a BPS bound is derived. There exists a o... |
gr-qc/0110031 | Dumitru Vulcanov | Dumitru N. Vulcanov, Miguel Alcubierre (Max-Planck-Institut fur
Gravitationsphysik, Albert-Einstein-Institut, Golm, Germany) | Testing the Cactus code on exact solutions of the Einstein field
equations | 18 pages, 18 figures, Latex | Int.J.Mod.Phys. C13 (2002) 805-822 | 10.1142/S0129183102003577 | null | gr-qc | null | The article presents a series of numerical simulations of exact solutions of
the Einstein equations performed using the Cactus code, a complete
3-dimensional machinery for numerical relativity. We describe an application
(``thorn'') for the Cactus code that can be used for evolving a variety of
exact solutions, with ... | [
{
"created": "Fri, 5 Oct 2001 11:19:09 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Mar 2002 11:00:26 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Vulcanov",
"Dumitru N.",
"",
"Max-Planck-Institut fur\n Gravitationsphysik, Albert-Einstein-Institut, Golm, Germany"
],
[
"Alcubierre",
"Miguel",
"",
"Max-Planck-Institut fur\n Gravitationsphysik, Albert-Einstein-Institut, Golm, Germany"
]
] | The article presents a series of numerical simulations of exact solutions of the Einstein equations performed using the Cactus code, a complete 3-dimensional machinery for numerical relativity. We describe an application (``thorn'') for the Cactus code that can be used for evolving a variety of exact solutions, with an... |
2407.13798 | Swarnim Shashank | Swarnim Shashank, Cosimo Bambi, Rittick Roy | Testing the Kerr nature with binary black hole inspirals | 7 pages, 1 figure. Prepared for the proceeding of the seventh
international workshop on the TianQin science mission | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The theory of general relativity (GR) is the standard framework for the
description of gravitation and the geometric structure of spacetime. With the
recent advancement of observational instruments, it has become possible to
probe the strong field regime to test GR. We present the constraints obtained
from the binary... | [
{
"created": "Wed, 17 Jul 2024 07:14:44 GMT",
"version": "v1"
}
] | 2024-07-22 | [
[
"Shashank",
"Swarnim",
""
],
[
"Bambi",
"Cosimo",
""
],
[
"Roy",
"Rittick",
""
]
] | The theory of general relativity (GR) is the standard framework for the description of gravitation and the geometric structure of spacetime. With the recent advancement of observational instruments, it has become possible to probe the strong field regime to test GR. We present the constraints obtained from the binary b... |
1311.1402 | Santos Jos\'e N\'u\~nez Jare\~no | J.A.R. Cembranos, A.L. Maroto, S.J. N\'u\~nez Jare\~no | Isotropy theorem for arbitrary-spin cosmological fields | 4 pages, 0 figures. Published on JCAP | null | 10.1088/1475-7516/2014/03/042 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the energy-momentum tensor of homogeneous fields of arbitrary
spin in an expanding universe is always isotropic in average provided the
fields remain bounded and evolve rapidly compared to the rate of expansion. An
analytic expression for the average equation of state is obtained for
Lagrangians with gen... | [
{
"created": "Tue, 5 Nov 2013 15:03:00 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Jun 2014 10:00:47 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Cembranos",
"J. A. R.",
""
],
[
"Maroto",
"A. L.",
""
],
[
"Jareño",
"S. J. Núñez",
""
]
] | We show that the energy-momentum tensor of homogeneous fields of arbitrary spin in an expanding universe is always isotropic in average provided the fields remain bounded and evolve rapidly compared to the rate of expansion. An analytic expression for the average equation of state is obtained for Lagrangians with gener... |
1802.06808 | Carlos A. S. Almeida | C A S Almeida, D F S Veras and D M Dantas | Corrections to Newton's law of gravitation - application to hybrid Bloch
brane | 7 pages, 3 figures, Proceedings of The XXVth International Conference
on Integrable Systems and Quantum symmetries (ISQS-25) | IOP Conf. Series: Journal of Physics: Conf. Series 965 (2018)
012002 | 10.1088/1742-6596/965/1/012002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present in this work, the calculations of corrections in the Newton's law
of gravitation due to Kaluza-Klein gravitons in five-dimensional warped thick
braneworld scenarios. We consider here a recently proposed model, namely, the
hybrid Bloch brane. This model couples two scalar fields to gravity and is
engendered... | [
{
"created": "Mon, 19 Feb 2018 19:03:37 GMT",
"version": "v1"
}
] | 2018-02-21 | [
[
"Almeida",
"C A S",
""
],
[
"Veras",
"D F S",
""
],
[
"Dantas",
"D M",
""
]
] | We present in this work, the calculations of corrections in the Newton's law of gravitation due to Kaluza-Klein gravitons in five-dimensional warped thick braneworld scenarios. We consider here a recently proposed model, namely, the hybrid Bloch brane. This model couples two scalar fields to gravity and is engendered f... |
2204.00982 | Guangzhou Guo | Guangzhou Guo, Peng Wang, Houwen Wu, and Haitang Yang | Echoes from Hairy Black Holes | 22 pages, 6 figures, 2 tables and references add | null | 10.1007/JHEP06(2022)073 | CTP-SCU/2022004 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the waveforms of time signals produced by scalar perturbations in
static hairy black holes, in which the perturbations can be governed by a
double-peak effective potential. The inner potential peak would give rise to
echoes, which provide a powerful tool to test the Kerr hypothesis. The
waveforms are constru... | [
{
"created": "Sun, 3 Apr 2022 04:00:59 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Apr 2022 15:39:30 GMT",
"version": "v2"
}
] | 2022-06-29 | [
[
"Guo",
"Guangzhou",
""
],
[
"Wang",
"Peng",
""
],
[
"Wu",
"Houwen",
""
],
[
"Yang",
"Haitang",
""
]
] | We study the waveforms of time signals produced by scalar perturbations in static hairy black holes, in which the perturbations can be governed by a double-peak effective potential. The inner potential peak would give rise to echoes, which provide a powerful tool to test the Kerr hypothesis. The waveforms are construct... |
2001.09687 | Andronikos Paliathanasis | Nikolaos Dimakis and Andronikos Paliathanasis | Crossing the phantom divide line as an effect of quantum transitions | 23 pages, 7 figures, version accepted for publication by Classical
and Quantum Gravity | null | 10.1088/1361-6382/abdaf6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the Chiral cosmological model consisting of two scalar fields
minimally coupled to gravity. In the context of a
Friedmann--Lema\^{\i}tre--Robertson--Walker (FLRW) space-time, and for massless
fields in the presence of a cosmological constant, we present the general
solution of the field equations. The min... | [
{
"created": "Mon, 27 Jan 2020 10:54:39 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Jan 2021 16:25:41 GMT",
"version": "v2"
}
] | 2021-06-09 | [
[
"Dimakis",
"Nikolaos",
""
],
[
"Paliathanasis",
"Andronikos",
""
]
] | We consider the Chiral cosmological model consisting of two scalar fields minimally coupled to gravity. In the context of a Friedmann--Lema\^{\i}tre--Robertson--Walker (FLRW) space-time, and for massless fields in the presence of a cosmological constant, we present the general solution of the field equations. The minis... |
1603.08087 | Sang Pyo Kim | Sang Pyo Kim, Won Kim (Kunsan Natl U.) | Will quantum cosmology resurrect chaotic inflation model? | LaTex 10 pages, 1 figure; CosPA 2015 (Cosmology and Particle
Astrophysics), IBS, Daejeon, Korea, Oct. 12-16, 2015; to be published in Int.
J. Mod. Phys.: Conf. Ser | null | 10.1142/S2010194516602052 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The single field chaotic inflation model with a monomial power greater than
one seems to be ruled out by the recent Planck and WMAP CMB data while
Starobinsky model with a higher curvature term seems to be a viable model.
Higher curvature terms being originated from quantum fluctuations, we revisit
the quantum cosmol... | [
{
"created": "Sat, 26 Mar 2016 08:41:05 GMT",
"version": "v1"
}
] | 2016-08-03 | [
[
"Kim",
"Sang Pyo",
"",
"Kunsan Natl U."
],
[
"Kim",
"Won",
"",
"Kunsan Natl U."
]
] | The single field chaotic inflation model with a monomial power greater than one seems to be ruled out by the recent Planck and WMAP CMB data while Starobinsky model with a higher curvature term seems to be a viable model. Higher curvature terms being originated from quantum fluctuations, we revisit the quantum cosmolog... |
gr-qc/0504106 | Alessandra Di Credico | Alessandra Di Credico (for the LIGO Scientific Collaboration) | Gravitational wave burst vetoes in the LIGO S2 and S3 data analyses | 9 pages, 4 figures, submitted to Classical and Quantum Gravity for
the special issue of the GWDAW9 Proceedings | Class.Quant.Grav. 22 (2005) S1051-S1058 | 10.1088/0264-9381/22/18/S19 | null | gr-qc | null | The LIGO detectors collected about 4 months of data in 2003-2004 during two
science runs, S2 and S3. Several environmental and auxiliary channels that
monitor the instruments' physical environment and overall interferometric
operation were analyzed in order to establish the quality of the data as well
as the presence... | [
{
"created": "Thu, 21 Apr 2005 16:39:21 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Di Credico",
"Alessandra",
"",
"for the LIGO Scientific Collaboration"
]
] | The LIGO detectors collected about 4 months of data in 2003-2004 during two science runs, S2 and S3. Several environmental and auxiliary channels that monitor the instruments' physical environment and overall interferometric operation were analyzed in order to establish the quality of the data as well as the presence o... |
gr-qc/9412008 | David Garfinkle | David Garfinkle | Choptuik scaling in null coordinates | latex (revtex), 6 figures included in the file | Phys.Rev.D51:5558-5561,1995 | 10.1103/PhysRevD.51.5558 | null | gr-qc | null | A numerical simulation is performed of the gravitational collapse of a
spherically symmetric scalar field. The algorithm uses the null initial value
formulation of the Einstein-scalar equations, but does {\it not} use adaptive
mesh refinement. A study is made of the critical phenomena found by Choptuik in
this system... | [
{
"created": "Fri, 2 Dec 1994 00:36:48 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Garfinkle",
"David",
""
]
] | A numerical simulation is performed of the gravitational collapse of a spherically symmetric scalar field. The algorithm uses the null initial value formulation of the Einstein-scalar equations, but does {\it not} use adaptive mesh refinement. A study is made of the critical phenomena found by Choptuik in this system. ... |
gr-qc/0612165 | Pankaj S. Joshi | Pankaj S. Joshi | The structure of non-spacelike curves from a spacetime singularity | 4 pages, revtex | null | null | null | gr-qc | null | We investigate here the causal structure of spacetime in the vicinity of a
spacetime singularity. The particle and energy emission from such ultra-dense
regions forming in gravitational collapse of a massive matter cloud is governed
by the nature of non-spacelike paths near the same. These trajectories are
examined t... | [
{
"created": "Tue, 26 Dec 2006 06:39:52 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Joshi",
"Pankaj S.",
""
]
] | We investigate here the causal structure of spacetime in the vicinity of a spacetime singularity. The particle and energy emission from such ultra-dense regions forming in gravitational collapse of a massive matter cloud is governed by the nature of non-spacelike paths near the same. These trajectories are examined to ... |
1010.5132 | Mihalis Dafermos | Mihalis Dafermos and Igor Rodnianski | Decay for solutions of the wave equation on Kerr exterior spacetimes
I-II: The cases |a| << M or axisymmetry | 57 pages, 4 figures | null | null | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper contains the first two parts (I-II) of a three-part series
concerning the scalar wave equation \Box_g{\psi} = 0 on a fixed Kerr
background. We here restrict to two cases: (II1) |a| \ll M, general {\psi} or
(II2) |a| < M, {\psi} axisymmetric. In either case, we prove a version of
'integrated local energy de... | [
{
"created": "Mon, 25 Oct 2010 14:07:37 GMT",
"version": "v1"
}
] | 2010-10-26 | [
[
"Dafermos",
"Mihalis",
""
],
[
"Rodnianski",
"Igor",
""
]
] | This paper contains the first two parts (I-II) of a three-part series concerning the scalar wave equation \Box_g{\psi} = 0 on a fixed Kerr background. We here restrict to two cases: (II1) |a| \ll M, general {\psi} or (II2) |a| < M, {\psi} axisymmetric. In either case, we prove a version of 'integrated local energy deca... |
2307.03164 | Hassan Firouzjahi | Hassan Firouzjahi, Alireza Talebian | Induced Gravitational Waves from Ultra Slow-Roll Inflation and Pulsar
Timing Arrays Observations | V3: References added, discussions improved, 16 pages, 5 figs. JCAP
published version | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | The stochastic gravitational wave background (SGWB) detected recently by the
pulsar timing arrays (PTAs) observations may have cosmological origins. In this
work we consider a model of single field inflation containing an intermediate
phase of ultra slow-roll. Fixing the amplitude of the peak of curvature
perturbatio... | [
{
"created": "Thu, 6 Jul 2023 17:46:58 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jul 2023 16:01:59 GMT",
"version": "v2"
},
{
"created": "Sun, 8 Oct 2023 13:04:41 GMT",
"version": "v3"
}
] | 2023-10-10 | [
[
"Firouzjahi",
"Hassan",
""
],
[
"Talebian",
"Alireza",
""
]
] | The stochastic gravitational wave background (SGWB) detected recently by the pulsar timing arrays (PTAs) observations may have cosmological origins. In this work we consider a model of single field inflation containing an intermediate phase of ultra slow-roll. Fixing the amplitude of the peak of curvature perturbations... |
gr-qc/0307002 | Hirotaka Takahashi | Hirotaka Takahashi, Hideyuki Tagoshi, the TAMA Collaboration and the
LISM Collaboration | Coincidence analysis to search for inspiraling compact binaries | 14 pages, 3 figures,accepted for publication in Class. Quant. Grav.
as Special issue article (Proceedings of GWDAW December 17-19, 2002, Kyoto,
Japan) | Class.Quant.Grav. 20 (2003) S741-S751 | 10.1088/0264-9381/20/17/317 | null | gr-qc astro-ph | null | We discuss a method of coincidence analysis to search for gravitational waves
from inspiraling compact binaries using the data of two laser interferometer
gravitational wave detectors. We examine the allowed difference of the wave's
parameters estimated by each detector to obtain good detection efficiency. We
also di... | [
{
"created": "Tue, 1 Jul 2003 04:16:09 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Takahashi",
"Hirotaka",
""
],
[
"Tagoshi",
"Hideyuki",
""
],
[
"Collaboration",
"the TAMA",
""
],
[
"Collaboration",
"the LISM",
""
]
] | We discuss a method of coincidence analysis to search for gravitational waves from inspiraling compact binaries using the data of two laser interferometer gravitational wave detectors. We examine the allowed difference of the wave's parameters estimated by each detector to obtain good detection efficiency. We also disc... |
1312.4641 | Sergey Kozyrev | Sergey Kozyrev | From Brans-Dicke theory to Newtonian gravity | 4 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/publicdomain/ | We present the new interpretation of scalar field for the Brans-Dicke theory.
This interpretation is obtained by considering a fixed spacetime structure of
manifold.
| [
{
"created": "Tue, 17 Dec 2013 05:06:37 GMT",
"version": "v1"
},
{
"created": "Sun, 22 Dec 2013 05:37:46 GMT",
"version": "v2"
}
] | 2013-12-24 | [
[
"Kozyrev",
"Sergey",
""
]
] | We present the new interpretation of scalar field for the Brans-Dicke theory. This interpretation is obtained by considering a fixed spacetime structure of manifold. |
1602.07992 | Sam Dolan Dr | David Dempsey and Sam R Dolan | Waves and null congruences in a draining bathtub | 12 pages, 2 figures. Proceedings for III Amazonian Symposium on
Physics | Int.J.Mod.Phys.D 25 (2016) 1641004 | 10.1142/S0218271816410042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study wave propagation in a draining bathtub: a fluid-mechanical black
hole analogue in which perturbations are governed by a Klein-Gordon equation on
an effective Lorentzian geometry. Like the Kerr spacetime, the draining bathtub
geometry possesses an (effective) horizon, an ergosphere and null circular
orbits. W... | [
{
"created": "Thu, 25 Feb 2016 16:47:37 GMT",
"version": "v1"
}
] | 2016-05-11 | [
[
"Dempsey",
"David",
""
],
[
"Dolan",
"Sam R",
""
]
] | We study wave propagation in a draining bathtub: a fluid-mechanical black hole analogue in which perturbations are governed by a Klein-Gordon equation on an effective Lorentzian geometry. Like the Kerr spacetime, the draining bathtub geometry possesses an (effective) horizon, an ergosphere and null circular orbits. We ... |
2011.14633 | Olivier Minazzoli | Olivier Minazzoli | De Sitter space-times in Entangled Relativity | 9 pages, no figure | Class. Quantum Grav.38(2021) 137003 (7pp) | 10.1088/1361-6382/ac0589 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is argued that de Sitter space-times might be solutions of entangled
relativity once the quantum trace anomaly from matter fields in curved
space-times is taken into account. This hypothesis would be an elegant solution
to the acceleration of the expansion of the universe within the rigid framework
of entangled re... | [
{
"created": "Mon, 30 Nov 2020 09:18:29 GMT",
"version": "v1"
},
{
"created": "Thu, 6 May 2021 08:05:05 GMT",
"version": "v2"
}
] | 2021-06-25 | [
[
"Minazzoli",
"Olivier",
""
]
] | It is argued that de Sitter space-times might be solutions of entangled relativity once the quantum trace anomaly from matter fields in curved space-times is taken into account. This hypothesis would be an elegant solution to the acceleration of the expansion of the universe within the rigid framework of entangled rela... |
1402.4521 | Shohei Aoyama | Shohei Aoyama, Rina Tazai, Kiyotomo Ichiki | Upper limit on the amplitude of gravitational waves around 0.1Hz from
the Global Positioning System | 6 pages, 2figures, Accepted for the publication in Physical Review D | null | 10.1103/PhysRevD.89.067101 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The global positioning system (GPS) is composed of thirty one satellites
having atomic clocks with $10^{-15}$ accuracy on board and enables one to
calibrate the primary standard for frequency on the ground. Using the fact that
oscillators on the ground have been successfully stabilized with high accuracy
by receiving... | [
{
"created": "Tue, 18 Feb 2014 22:50:29 GMT",
"version": "v1"
}
] | 2015-06-18 | [
[
"Aoyama",
"Shohei",
""
],
[
"Tazai",
"Rina",
""
],
[
"Ichiki",
"Kiyotomo",
""
]
] | The global positioning system (GPS) is composed of thirty one satellites having atomic clocks with $10^{-15}$ accuracy on board and enables one to calibrate the primary standard for frequency on the ground. Using the fact that oscillators on the ground have been successfully stabilized with high accuracy by receiving r... |
2207.05594 | Arun Mangalam | Prerna Rana (1), A. Mangalam (2) ((1) Tata Institute of Fundamental
Research, (2) Indian Institute of Astrophysics) | Bound orbit domains in the phase space of the Kerr geometry | 7 pages, 2 figures, Conference: Proceedings of the MG15 Meeting on
General Relativity | null | 10.1142/9789811258251_0116 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the conditions for a non-equatorial eccentric bound orbit to exist
around a Kerr black hole in two-parameter spaces: the energy, angular momentum
of the test particle, spin of the black hole, and Carter's constant space ($E$,
$L$, $a$, $Q$), and eccentricity, inverse-latus rectum space ($e$, $\mu$, $a$,
$Q$... | [
{
"created": "Tue, 12 Jul 2022 15:12:42 GMT",
"version": "v1"
}
] | 2022-12-07 | [
[
"Rana",
"Prerna",
""
],
[
"Mangalam",
"A.",
""
]
] | We derive the conditions for a non-equatorial eccentric bound orbit to exist around a Kerr black hole in two-parameter spaces: the energy, angular momentum of the test particle, spin of the black hole, and Carter's constant space ($E$, $L$, $a$, $Q$), and eccentricity, inverse-latus rectum space ($e$, $\mu$, $a$, $Q$).... |
2205.05149 | Vitorio A. De Lorenci | V. A. De Lorenci and L. T. de Paula | Analog models for gravity in linear magnetoelectrics | 7 pages, 1 figure | null | null | null | gr-qc physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Formal analogies between gravitational and optical phenomena have been
subject of study for over a century, leading to interesting scenarios for
testing kinematic aspects of general relativity in terrestrial laboratories.
Here, some aspects about analog models for gravity obtained from the analysis
of light propagati... | [
{
"created": "Tue, 10 May 2022 20:06:50 GMT",
"version": "v1"
}
] | 2022-05-12 | [
[
"De Lorenci",
"V. A.",
""
],
[
"de Paula",
"L. T.",
""
]
] | Formal analogies between gravitational and optical phenomena have been subject of study for over a century, leading to interesting scenarios for testing kinematic aspects of general relativity in terrestrial laboratories. Here, some aspects about analog models for gravity obtained from the analysis of light propagation... |
0812.2843 | Joel Weller | Philippe Brax, Carsten van de Bruck, Lisa M. H. Hall and Joel M.
Weller | Slow-Roll Inflation in the Presence of a Dark Energy Coupling | 15 pages, 7 figures; added references and a more detailed treatment
of the perturbation equations (Sec. II.B and fig.1) | Phys.Rev.D79:103508,2009 | 10.1103/PhysRevD.79.103508 | null | gr-qc astro-ph hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In models of coupled dark energy, in which a dark energy scalar field couples
to other matter components, it is natural to expect a coupling to the inflaton
as well. We explore the consequences of such a coupling in the context of
single field slow-roll inflation. Assuming an exponential potential for the
quintessenc... | [
{
"created": "Mon, 15 Dec 2008 16:34:31 GMT",
"version": "v1"
},
{
"created": "Mon, 18 May 2009 15:28:06 GMT",
"version": "v2"
}
] | 2009-10-29 | [
[
"Brax",
"Philippe",
""
],
[
"van de Bruck",
"Carsten",
""
],
[
"Hall",
"Lisa M. H.",
""
],
[
"Weller",
"Joel M.",
""
]
] | In models of coupled dark energy, in which a dark energy scalar field couples to other matter components, it is natural to expect a coupling to the inflaton as well. We explore the consequences of such a coupling in the context of single field slow-roll inflation. Assuming an exponential potential for the quintessence ... |
1003.4246 | Claus Gerhardt | Claus Gerhardt | Combining gravity with the forces of the standard model on a
cosmological scale | 53 pages, v6: some typos corrected | Class.Quant.Grav.27:155008,2010 | 10.1088/0264-9381/27/15/155008 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove the existence of a spectral resolution of the Wheeler-DeWitt
equation when the underlying spacetime is a Friedman universe with flat spatial
slices and where the matter fields are comprised of the strong interaction,
with $\SU(3)$ replaced by a general $\SU(n)$, $n\ge 2$, and the electro-weak
interaction. Th... | [
{
"created": "Mon, 22 Mar 2010 19:17:47 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Mar 2010 12:01:15 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Apr 2010 15:45:11 GMT",
"version": "v3"
},
{
"created": "Fri, 7 May 2010 18:44:24 GMT",
"version": "v4"
},
{
"cre... | 2010-07-27 | [
[
"Gerhardt",
"Claus",
""
]
] | We prove the existence of a spectral resolution of the Wheeler-DeWitt equation when the underlying spacetime is a Friedman universe with flat spatial slices and where the matter fields are comprised of the strong interaction, with $\SU(3)$ replaced by a general $\SU(n)$, $n\ge 2$, and the electro-weak interaction. The ... |
1309.5971 | Jose' P. S. Lemos | Jos\'e P. S. Lemos, Paulo Pani | Gravitational fields with sources, regular black holes, quasiblack
holes, and analogue black holes | Report of the Parallel Session AT3 at the Marcel Grossmann Meeting
13, Stockholm 2012, Proceedings of the Conference. 9 pages | null | null | null | gr-qc astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss recent developments in gravitational fields with sources, regular
black holes, quasiblack holes, and analogue black holes, related to the talks
presented at the corresponding Parallel Session AT3 of the 13th Marcel
Grossmann Meeting.
| [
{
"created": "Mon, 23 Sep 2013 20:21:53 GMT",
"version": "v1"
}
] | 2013-09-25 | [
[
"Lemos",
"José P. S.",
""
],
[
"Pani",
"Paulo",
""
]
] | We discuss recent developments in gravitational fields with sources, regular black holes, quasiblack holes, and analogue black holes, related to the talks presented at the corresponding Parallel Session AT3 of the 13th Marcel Grossmann Meeting. |
gr-qc/9412017 | Pietro Menotti | Pietro Menotti | Gravity in 2+1 dimensions | Two lectures given at the XI Italian Relativity Meeting, Trieste
26-30 September 1994 ; 30 pages plain TeX, no figures | null | null | IFUP-TH-70/94 | gr-qc hep-th | null | A review is given of some classical and quantum aspects of 2+1 dimensional
gravity.
| [
{
"created": "Tue, 6 Dec 1994 09:36:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Menotti",
"Pietro",
""
]
] | A review is given of some classical and quantum aspects of 2+1 dimensional gravity. |
1011.2726 | Razvan-Gheorghe Gurau | Razvan Gurau | The 1/N expansion of colored tensor models | typos corrected, references updated | Annales Henri Poincare 12:829-847,2011 | 10.1007/s00023-011-0101-8 | PI-QG-201 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we perform the 1/N expansion of the colored three dimensional
Boulatov tensor model. As in matrix models, we obtain a systematic topological
expansion, with more and more complicated topologies suppressed by higher and
higher powers of N. We compute the first orders of the expansion and prove that
only ... | [
{
"created": "Thu, 11 Nov 2010 18:07:42 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Nov 2010 15:46:17 GMT",
"version": "v2"
}
] | 2011-05-18 | [
[
"Gurau",
"Razvan",
""
]
] | In this paper we perform the 1/N expansion of the colored three dimensional Boulatov tensor model. As in matrix models, we obtain a systematic topological expansion, with more and more complicated topologies suppressed by higher and higher powers of N. We compute the first orders of the expansion and prove that only gr... |
gr-qc/9801049 | Tomohiro Harada | Tomohiro Harada | Neutron stars in scalar-tensor theories of gravity and catastrophe
theory | 17 pages, 9 postscript figures. Accepted for publication in Physical
Review D | Phys.Rev. D57 (1998) 4802-4811 | 10.1103/PhysRevD.57.4802 | KUNS-1476 | gr-qc astro-ph | null | We investigate neutron stars in scalar-tensor theories. We examine their
secular stability against spherically symmetric perturbations by use of a
turning point method. For some choices of the coupling function contained in
the theories, the number of the stable equilibrium solutions changes and the
realized equilibr... | [
{
"created": "Wed, 14 Jan 1998 14:10:15 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Feb 1998 02:04:04 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Harada",
"Tomohiro",
""
]
] | We investigate neutron stars in scalar-tensor theories. We examine their secular stability against spherically symmetric perturbations by use of a turning point method. For some choices of the coupling function contained in the theories, the number of the stable equilibrium solutions changes and the realized equilibriu... |
2107.12164 | Bibhas Majhi Ranjan | Mousumi Maitra, Debaprasad Maity, Bibhas Ranjan Majhi | BMS Goldstone modes near the horizon of a Kerr black hole are thermal | Minor modifications, to appear Phys. Lett. B | null | 10.1016/j.physletb.2021.136825 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Near horizon Bondi-Metzner-Sachs (BMS) like symmetry is spontaneously broken
by the black hole background itself and hence gives rise to Goldstone mode. The
associated Goldstone mode for the near horizon BMS like symmetry of a
Schwarzschild black hole was found to behave like inverted harmonic
oscillators, which has ... | [
{
"created": "Mon, 26 Jul 2021 12:31:24 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Dec 2021 06:31:50 GMT",
"version": "v2"
}
] | 2021-12-15 | [
[
"Maitra",
"Mousumi",
""
],
[
"Maity",
"Debaprasad",
""
],
[
"Majhi",
"Bibhas Ranjan",
""
]
] | Near horizon Bondi-Metzner-Sachs (BMS) like symmetry is spontaneously broken by the black hole background itself and hence gives rise to Goldstone mode. The associated Goldstone mode for the near horizon BMS like symmetry of a Schwarzschild black hole was found to behave like inverted harmonic oscillators, which has be... |
1704.04169 | Daiske Yoshida | Daiske Yoshida, Jiro Soda | Electromagnetic Memory Effect Induced by Axion Dark Matter | 11 pages, 2 figures | Phys. Rev. D 96, 064005 (2017) | 10.1103/PhysRevD.96.064005 | KOBE-COSMO-17-06 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Memory effects of gravitational waves from astronomical events or primordial
universe might have the information of new physics. It is intriguing to observe
that the memory effect exists in electrodynamics as a net momentum kick, while
the memory effect in gravity appears as a net relatively displacement. In
particul... | [
{
"created": "Thu, 13 Apr 2017 15:14:17 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Sep 2017 06:47:51 GMT",
"version": "v2"
}
] | 2017-09-13 | [
[
"Yoshida",
"Daiske",
""
],
[
"Soda",
"Jiro",
""
]
] | Memory effects of gravitational waves from astronomical events or primordial universe might have the information of new physics. It is intriguing to observe that the memory effect exists in electrodynamics as a net momentum kick, while the memory effect in gravity appears as a net relatively displacement. In particular... |
0901.1387 | Bijan Saha | Bijan Saha | Spinor model of a perfect fluid | 5 pages, some misprints are corrected, some new expressions are added | Central Eur.J.Phys.8 (2010) 920 - 923 | 10.2478/s11534-010-0019-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Different characteristic of matter influencing the evolution of the Universe
has been simulated by means of a nonlinear spinor field. We have considered two
cases where the spinor field nonlinearity occurs either as a result of
self-action or due to the interaction with a scalar field.
| [
{
"created": "Sat, 10 Jan 2009 16:44:53 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jan 2009 08:49:03 GMT",
"version": "v2"
}
] | 2015-05-01 | [
[
"Saha",
"Bijan",
""
]
] | Different characteristic of matter influencing the evolution of the Universe has been simulated by means of a nonlinear spinor field. We have considered two cases where the spinor field nonlinearity occurs either as a result of self-action or due to the interaction with a scalar field. |
2304.04198 | Yan Peng | Guohua Liu, Yan Peng | No long hair behaviors of ultra-compact objects | 7 pages | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate distributions of matter fields outside spherically symmetric
ultra-compact objects in the asymptotically flat background. Based on the
dominant energy condition and the non-negative trace condition, we analytically
find a no long hair behavior, which states that the effective radius of matter
field hai... | [
{
"created": "Sun, 9 Apr 2023 09:07:16 GMT",
"version": "v1"
}
] | 2023-04-11 | [
[
"Liu",
"Guohua",
""
],
[
"Peng",
"Yan",
""
]
] | We investigate distributions of matter fields outside spherically symmetric ultra-compact objects in the asymptotically flat background. Based on the dominant energy condition and the non-negative trace condition, we analytically find a no long hair behavior, which states that the effective radius of matter field hairs... |
2302.10155 | Miguel Cruz | V\'ictor H. C\'ardenas, Miguel Cruz and Samuel Lepe | Generalized second law of thermodynamics for the matter creation
scenario and emergence of phantom regime | 7 pages, no figures. Accepted for publication in EPJ Plus | Eur. Phys. J. Plus 139, 642 (2024) | 10.1140/epjp/s13360-024-05447-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work is focused on the exploration of the thermodynamics foundations of
the matter creation scenario when a generalized form of the second law of
thermodynamics for this scheme is implemented. In this scenario we consider an
expanding cosmology in which the created matter is trapped by the apparent
horizon. The ... | [
{
"created": "Mon, 20 Feb 2023 18:40:55 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Aug 2023 19:29:47 GMT",
"version": "v2"
},
{
"created": "Wed, 22 Nov 2023 22:46:32 GMT",
"version": "v3"
},
{
"created": "Sun, 21 Jul 2024 16:46:01 GMT",
"version": "v4"
}
] | 2024-07-23 | [
[
"Cárdenas",
"Víctor H.",
""
],
[
"Cruz",
"Miguel",
""
],
[
"Lepe",
"Samuel",
""
]
] | This work is focused on the exploration of the thermodynamics foundations of the matter creation scenario when a generalized form of the second law of thermodynamics for this scheme is implemented. In this scenario we consider an expanding cosmology in which the created matter is trapped by the apparent horizon. The sc... |
0708.2490 | Rickard Jonsson | Rickard Jonsson | Gyroscope precession in special and general relativity from basic
principles | 10 pages, 14 figures. Also includes an addendum, 1 page, 1 figure | Am.J.Phys.75:463-471,2007 | 10.1119/1.2719202 | null | gr-qc | null | In special relativity a gyroscope that is suspended in a torque-free manner
will precess as it is moved along a curved path relative to an inertial frame
S. We explain this effect, which is known as Thomas precession, by considering
a real grid that moves along with the gyroscope, and that by definition is not
rotati... | [
{
"created": "Sat, 18 Aug 2007 15:17:58 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Jonsson",
"Rickard",
""
]
] | In special relativity a gyroscope that is suspended in a torque-free manner will precess as it is moved along a curved path relative to an inertial frame S. We explain this effect, which is known as Thomas precession, by considering a real grid that moves along with the gyroscope, and that by definition is not rotating... |
1508.01102 | Hristu Culetu | Hristu Culetu | Screening an extremal black hole with a thin shell of exotic matter | 7 pages, no figures, minor changes, published in Physics of the Dark
Universe 14 (2016) 1-3 | null | 10.1016/j.dark.2016.07.004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the possibility of shielding a regular extremal black hole by means
of a matter thin-shell. While the surface energy density $\sigma$ on the static
shell is negative, the tangential pressures $p$ are positive, both of them
being finite when the shell approaches the black hole horizon. The
Darmois-Israel junc... | [
{
"created": "Wed, 5 Aug 2015 15:17:13 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Aug 2015 10:29:32 GMT",
"version": "v2"
},
{
"created": "Thu, 8 Oct 2015 13:44:44 GMT",
"version": "v3"
},
{
"created": "Fri, 12 Aug 2016 15:42:59 GMT",
"version": "v4"
}
] | 2016-08-15 | [
[
"Culetu",
"Hristu",
""
]
] | We study the possibility of shielding a regular extremal black hole by means of a matter thin-shell. While the surface energy density $\sigma$ on the static shell is negative, the tangential pressures $p$ are positive, both of them being finite when the shell approaches the black hole horizon. The Darmois-Israel juncti... |
0801.2213 | Matveev Alexei S. | V.E. Didenko, A.S. Matveev and M.A. Vasiliev | Unfolded Description of $AdS_4$ Kerr Black Hole | 18 pages | Phys.Lett.B665:284-293,2008 | 10.1016/j.physletb.2008.05.067 | null | gr-qc hep-th | null | It is shown that $AdS_4$ Kerr black hole is a solution of simple unfolded
differential equations that form a deformation of the zero-curvature
description of empty $AdS_4$ space-time. Our construction uses the Killing
symmetries of the Kerr solution. All known and some new algebraic properties of
the Kerr-Schild solu... | [
{
"created": "Tue, 15 Jan 2008 05:01:34 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Jan 2008 00:20:39 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Didenko",
"V. E.",
""
],
[
"Matveev",
"A. S.",
""
],
[
"Vasiliev",
"M. A.",
""
]
] | It is shown that $AdS_4$ Kerr black hole is a solution of simple unfolded differential equations that form a deformation of the zero-curvature description of empty $AdS_4$ space-time. Our construction uses the Killing symmetries of the Kerr solution. All known and some new algebraic properties of the Kerr-Schild soluti... |
gr-qc/0009048 | Semyon Pol'shin | Simeon Pol'shin | Quantization of massless fields over the static Robertson-Walker space
of constant negative curvature | 13 pages, LATEX, using ioplppt.sty and iopfts.sty. v.2: discussion
with a lot of references is added. To appear in CQG | Class.Quant.Grav. 18 (2001) 2905-2916 | 10.1088/0264-9381/18/15/306 | null | gr-qc | null | Taking the ${\Bbb R}^1 \times H^3$ space as an example, we develop the new
method of quantization of fields over symmetric spaces. We construct the
quantized massless fields of an arbitrary spin over the ${\Bbb R}^1 \times H^3$
space by the resolution over the systems of "plane waves" which are solutions
of the corre... | [
{
"created": "Wed, 13 Sep 2000 23:01:39 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jun 2001 20:22:12 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Pol'shin",
"Simeon",
""
]
] | Taking the ${\Bbb R}^1 \times H^3$ space as an example, we develop the new method of quantization of fields over symmetric spaces. We construct the quantized massless fields of an arbitrary spin over the ${\Bbb R}^1 \times H^3$ space by the resolution over the systems of "plane waves" which are solutions of the corresp... |
0805.3955 | Jarmo M\"akel\"a Dr. | J. Makela | A Simple Quantum-Mechanical Model of Spacetime II: Thermodynamics of
Spacetime | 37 pages. This is the second part in a series of two papers, where
the paper gr-qc/0701128 has been divided in two and largely rewritten. In
this version some typos have been corrected, and the paper has been partly
re-organized | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this second part of our series of two papers, where spacetime is modelled
by a graph, where Planck size quantum black holes lie on the vertices, we
consider the thermodynamics of spacetime. We formulate an equation which tells
in which way an accelerating, spacelike two-surface of spacetime interacts with
the ther... | [
{
"created": "Mon, 26 May 2008 13:19:57 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Jul 2008 12:45:21 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Oct 2009 11:07:53 GMT",
"version": "v3"
}
] | 2009-10-21 | [
[
"Makela",
"J.",
""
]
] | In this second part of our series of two papers, where spacetime is modelled by a graph, where Planck size quantum black holes lie on the vertices, we consider the thermodynamics of spacetime. We formulate an equation which tells in which way an accelerating, spacelike two-surface of spacetime interacts with the therma... |
0811.2615 | Yi Ling | Yi Ling and Qingzhang Wu | The Big Bounce in Rainbow Universe | 8pages, 5figures. Final version published in PLB. | Phys.Lett.B687:103-109,2010 | 10.1016/j.physletb.2010.03.028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The usual Einstein's equations is modified as a one parameter family of
equations in the framework of rainbow gravity. In this paper we derive the
modified Friedmann-Robertson-Walker (FRW) equations when the cosmological
evolution of radiation particles is taken into account. In particular, given
some specific disper... | [
{
"created": "Mon, 17 Nov 2008 02:53:08 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Apr 2010 02:22:38 GMT",
"version": "v2"
}
] | 2010-04-15 | [
[
"Ling",
"Yi",
""
],
[
"Wu",
"Qingzhang",
""
]
] | The usual Einstein's equations is modified as a one parameter family of equations in the framework of rainbow gravity. In this paper we derive the modified Friedmann-Robertson-Walker (FRW) equations when the cosmological evolution of radiation particles is taken into account. In particular, given some specific dispersi... |
0905.2424 | Yi Xie | Yi Xie (Nanjing University, China; University of Missouri-Columbia,
USA), Sergei Kopeikin (University of Missouri-Columbia, USA) | Reference Frames, Gauge Transformations and Gravitomagnetism in the
Post-Newtonian Theory of the Lunar Motion | 5 pages, no figure, submitted to Proceedings IAU Symposium No. 261 | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/3.0/ | We construct a set of reference frames for description of the orbital and
rotational motion of the Moon. We use a scalar-tensor theory of gravity
depending on two parameters of the parametrized post-Newtonian (PPN) formalism
and utilize the concepts of the relativistic resolutions on reference frames
adopted by the I... | [
{
"created": "Thu, 14 May 2009 20:46:23 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Sep 2009 22:25:59 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Nov 2009 21:51:24 GMT",
"version": "v3"
}
] | 2009-11-23 | [
[
"Xie",
"Yi",
"",
"Nanjing University, China; University of Missouri-Columbia,\n USA"
],
[
"Kopeikin",
"Sergei",
"",
"University of Missouri-Columbia, USA"
]
] | We construct a set of reference frames for description of the orbital and rotational motion of the Moon. We use a scalar-tensor theory of gravity depending on two parameters of the parametrized post-Newtonian (PPN) formalism and utilize the concepts of the relativistic resolutions on reference frames adopted by the Int... |
1506.01247 | Varun Sahni | Varun Sahni, Yuri Shtanov, Aleksey Toporensky | Arrow of time in dissipationless cosmology | 19 pages, 6 figures. Matches published version in Class. Quantum
Grav. 32 (2015) 182001 (Fast Track Communication) | Class. Quantum Grav. 32 (2015) 182001 | 10.1088/0264-9381/32/18/182001 | null | gr-qc astro-ph.CO hep-ph hep-th physics.pop-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is generally believed that a cosmological arrow of time must be associated
with entropy production. Indeed, in his seminal work on cyclic cosmology,
Tolman introduced a viscous fluid in order to make successive
expansion/contraction cycles larger than previous ones, thereby generating an
arrow of time. However, as... | [
{
"created": "Wed, 3 Jun 2015 14:02:21 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Aug 2015 12:37:42 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Aug 2015 08:50:35 GMT",
"version": "v3"
}
] | 2018-10-26 | [
[
"Sahni",
"Varun",
""
],
[
"Shtanov",
"Yuri",
""
],
[
"Toporensky",
"Aleksey",
""
]
] | It is generally believed that a cosmological arrow of time must be associated with entropy production. Indeed, in his seminal work on cyclic cosmology, Tolman introduced a viscous fluid in order to make successive expansion/contraction cycles larger than previous ones, thereby generating an arrow of time. However, as w... |
2112.04609 | Juan Manuel L\'opez-Vega | Pasquale Bosso and Juan Manuel L\'opez Vega | Minimal Length Phenomenology and the Black Body Radiation | 15 pages, 3 figures | null | 10.1088/1361-6382/ac821c | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The generalized uncertainty principle (GUP) modifies the uncertainty relation
between momentum and position giving room for a minimal length, as predicted by
candidates theories of quantum gravity. Inspired by GUP, Planck's distribution
is derived by considering a new quantization of the electromagnetic field. We
ela... | [
{
"created": "Wed, 8 Dec 2021 22:36:48 GMT",
"version": "v1"
}
] | 2022-08-24 | [
[
"Bosso",
"Pasquale",
""
],
[
"Vega",
"Juan Manuel López",
""
]
] | The generalized uncertainty principle (GUP) modifies the uncertainty relation between momentum and position giving room for a minimal length, as predicted by candidates theories of quantum gravity. Inspired by GUP, Planck's distribution is derived by considering a new quantization of the electromagnetic field. We elabo... |
1405.7846 | Hor\'acio Santana Vieira | H. S. Vieira, V. B. Bezerra and Andr\'e A. Costa | Scalar fields in the Lense-Thirring background with a cosmic string and
Hawking radiation | 6 pages | EPL 109 (2015) 60006 | 10.1209/0295-5075/109/60006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the influence of the gravitational field produced by a slowly
rotating black hole with a cosmic string along the axis of symmetry on a
massive scalar field. Exact solutions of both angular and radial parts of the
Klein-Gordon equation in this spacetime are obtained, and are given in terms of
the confluent ... | [
{
"created": "Fri, 30 May 2014 13:04:14 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Apr 2015 11:12:43 GMT",
"version": "v2"
}
] | 2015-04-14 | [
[
"Vieira",
"H. S.",
""
],
[
"Bezerra",
"V. B.",
""
],
[
"Costa",
"André A.",
""
]
] | We analyze the influence of the gravitational field produced by a slowly rotating black hole with a cosmic string along the axis of symmetry on a massive scalar field. Exact solutions of both angular and radial parts of the Klein-Gordon equation in this spacetime are obtained, and are given in terms of the confluent He... |
0901.3881 | Hideo Kodama | Hideo Kodama | Repulsons in the 5D Myers-Perry Family | 4 pages, 2 figures. A talk given at JGRG18 (Hiroshima U, Japan, 18-21
Nov. 2008) | null | null | KEK-Cosmo-22 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this talk, we point out that curvature-regular asymptotically flat
solitons with negative mass are contained in the Myers-Perry family in five
dimensions. These solitons do not have horizon, but instead a conical NUT
singularity of quasi-regular nature surrounded by naked CTCs. We show that this
quasi-regular sing... | [
{
"created": "Sun, 25 Jan 2009 08:44:11 GMT",
"version": "v1"
}
] | 2009-01-27 | [
[
"Kodama",
"Hideo",
""
]
] | In this talk, we point out that curvature-regular asymptotically flat solitons with negative mass are contained in the Myers-Perry family in five dimensions. These solitons do not have horizon, but instead a conical NUT singularity of quasi-regular nature surrounded by naked CTCs. We show that this quasi-regular singul... |
1805.11009 | Z. Yousaf | Wajiha Javed, Z. Yousaf, Zunaira Akhtar | Thermodynamics and Glassy Phase Transition of Regular Black Holes | 26 pages, 11 figures | Mod. Phys. Lett. A 33, 1850089 (2018) | 10.1142/S021773231850089X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present paper is aimed to study thermodynamical properties of phase
transition for regular charged black holes. In this context, we have considered
two different forms of black hole metrics supplemented with exponential and
logistic distribution functions and investigated the recent expansion of phase
transition ... | [
{
"created": "Thu, 24 May 2018 09:03:28 GMT",
"version": "v1"
},
{
"created": "Tue, 29 May 2018 12:39:45 GMT",
"version": "v2"
}
] | 2018-05-30 | [
[
"Javed",
"Wajiha",
""
],
[
"Yousaf",
"Z.",
""
],
[
"Akhtar",
"Zunaira",
""
]
] | The present paper is aimed to study thermodynamical properties of phase transition for regular charged black holes. In this context, we have considered two different forms of black hole metrics supplemented with exponential and logistic distribution functions and investigated the recent expansion of phase transition th... |
2406.02109 | Bekir Can L\"utf\"uo\u{g}lu | B. Hamil and B. C. L\"utf\"uo\u{g}lu | Euler-Heisenberg black hole surrounded by quintessence in the background
of perfect fluid dark matter: Thermodynamics, Shadows and Quasinormal modes | 23 Figures, 8 Tables, and 25 Pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Current observations show that a significant fraction of the Universe is
composed of dark energy and dark matter. In this paper, we investigate the
simultaneous effects of these dark sectors on the Euler-Heisenberg black hole,
using the quintessence matter field and perfect fluid to model them. In
particular, we stud... | [
{
"created": "Tue, 4 Jun 2024 08:36:21 GMT",
"version": "v1"
}
] | 2024-06-05 | [
[
"Hamil",
"B.",
""
],
[
"Lütfüoğlu",
"B. C.",
""
]
] | Current observations show that a significant fraction of the Universe is composed of dark energy and dark matter. In this paper, we investigate the simultaneous effects of these dark sectors on the Euler-Heisenberg black hole, using the quintessence matter field and perfect fluid to model them. In particular, we study ... |
1512.07152 | Saravanan Satish Kumar | S. Satish Kumar | Motion of a spinning particle in curved space-time | 6 pages, to be published in the Proceedings of the Fourteenth Marcel
Grossmann Meeting - MG14 (World Scientific) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The motion of spinning test-masses in curved space-time is described with a
covariant hamiltonian formalism. A large class of hamiltonians can be used with
the model- independent Poisson-Dirac brackets, to obtain equations of motion.
Here we apply it to the minimal hamiltonian and also to a non-minimal
hamiltonian, d... | [
{
"created": "Tue, 22 Dec 2015 16:43:39 GMT",
"version": "v1"
}
] | 2015-12-23 | [
[
"Kumar",
"S. Satish",
""
]
] | The motion of spinning test-masses in curved space-time is described with a covariant hamiltonian formalism. A large class of hamiltonians can be used with the model- independent Poisson-Dirac brackets, to obtain equations of motion. Here we apply it to the minimal hamiltonian and also to a non-minimal hamiltonian, des... |
1204.5466 | Cenalo Vaz | Cenalo Vaz and Kinjalk Lochan | Tunneling during Quantum Collapse in AdS Spacetime | 14 pages. No figures. Title changed to published version | Phys. Rev. D 87, 024045 (2013) | 10.1103/PhysRevD.87.024045 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend previous results on the reflection and transmission of
self-gravitating dust shells across the apparent horizon during quantum dust
collapse to non-marginally-bound dust collapse in arbitrary dimensions with a
negative cosmological constant. We show that the Hawking temperature is
independent of the energy ... | [
{
"created": "Tue, 24 Apr 2012 19:33:04 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Jan 2013 18:35:13 GMT",
"version": "v2"
}
] | 2013-01-31 | [
[
"Vaz",
"Cenalo",
""
],
[
"Lochan",
"Kinjalk",
""
]
] | We extend previous results on the reflection and transmission of self-gravitating dust shells across the apparent horizon during quantum dust collapse to non-marginally-bound dust collapse in arbitrary dimensions with a negative cosmological constant. We show that the Hawking temperature is independent of the energy fu... |
1703.02058 | Christian Pfeifer | Leonardo Barcaroli, Lukas K. Brunkhorst, Giulia Gubitosi, Niccol\'o
Loret, Christian Pfeifer | Curved spacetimes with local $\kappa$-Poincar\'e dispersion relation | 28 pages, updated to accepted journal version, appendix on
kappa-Poincare electrodynamics added | Phys. Rev. D 96, 084010 (2017) | 10.1103/PhysRevD.96.084010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use our previously developed identification of dispersion relations with
Hamilton functions on phase space to locally implement the $\kappa$-Poincar\'e
dispersion relation in the momentum spaces at each point of a generic curved
spacetime. We use this general construction to build the most general
Hamiltonian comp... | [
{
"created": "Mon, 6 Mar 2017 19:01:01 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Oct 2017 05:50:11 GMT",
"version": "v2"
}
] | 2017-10-10 | [
[
"Barcaroli",
"Leonardo",
""
],
[
"Brunkhorst",
"Lukas K.",
""
],
[
"Gubitosi",
"Giulia",
""
],
[
"Loret",
"Niccoló",
""
],
[
"Pfeifer",
"Christian",
""
]
] | We use our previously developed identification of dispersion relations with Hamilton functions on phase space to locally implement the $\kappa$-Poincar\'e dispersion relation in the momentum spaces at each point of a generic curved spacetime. We use this general construction to build the most general Hamiltonian compat... |
2405.05011 | Xiangyu Wang | Xiangyu Wang, Xiaobao Wang, Hai-Qing Zhang, Minyong Guo | Is a photon ring invariably a closed structure? | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, we investigate the image of a rotating compact object (CO)
illuminated by a geometrically thin, optically thin disk on the equatorial
plane. As the radius of the CO's surface fluctuates, the CO may partially or
entirely obscure the photon region. We observe that the perceived photon ring
may exhibit di... | [
{
"created": "Wed, 8 May 2024 12:25:53 GMT",
"version": "v1"
}
] | 2024-05-09 | [
[
"Wang",
"Xiangyu",
""
],
[
"Wang",
"Xiaobao",
""
],
[
"Zhang",
"Hai-Qing",
""
],
[
"Guo",
"Minyong",
""
]
] | In this study, we investigate the image of a rotating compact object (CO) illuminated by a geometrically thin, optically thin disk on the equatorial plane. As the radius of the CO's surface fluctuates, the CO may partially or entirely obscure the photon region. We observe that the perceived photon ring may exhibit disc... |
1702.07166 | Krishnakanta Bhattacharya | Krishnakanta Bhattacharya, Bibhas Ranjan Majhi | Fresh look at the scalar-tensor theory of gravity in Jordan and Einstein
frames from undiscussed standpoints | Typos corrected, published in Phys. Rev. D | Phys. Rev. D95 (2017) 064026 | 10.1103/PhysRevD.95.064026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the scalar-tensor theory of gravity profoundly in the action level
as well as in the thermodynamic level. Contrary to the usual description in the
literature about the equivalence in the two conformally connected frames, this
paper addresses several incomplete inferences regarding it and mentions some
inequi... | [
{
"created": "Thu, 23 Feb 2017 10:49:06 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Mar 2017 11:04:58 GMT",
"version": "v2"
}
] | 2017-05-19 | [
[
"Bhattacharya",
"Krishnakanta",
""
],
[
"Majhi",
"Bibhas Ranjan",
""
]
] | We study the scalar-tensor theory of gravity profoundly in the action level as well as in the thermodynamic level. Contrary to the usual description in the literature about the equivalence in the two conformally connected frames, this paper addresses several incomplete inferences regarding it and mentions some inequiva... |
2406.05851 | C\'edric Jockel | C\'edric Jockel and Leon Menger | The Effect of Torsion on Neutron Star Structure in Einstein-Cartan
Gravity | 19 pages, 4 figures | null | null | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by-sa/4.0/ | Einstein--Cartan gravity is a close historical sibling of general relativity
that allows for spacetime torsion. As a result, angular momentum couples to
spacetime geometry in a similar way to energy. While consequences of this are
well studied on cosmological scales, their role in neutron star physics is
largely unde... | [
{
"created": "Sun, 9 Jun 2024 16:49:30 GMT",
"version": "v1"
}
] | 2024-06-11 | [
[
"Jockel",
"Cédric",
""
],
[
"Menger",
"Leon",
""
]
] | Einstein--Cartan gravity is a close historical sibling of general relativity that allows for spacetime torsion. As a result, angular momentum couples to spacetime geometry in a similar way to energy. While consequences of this are well studied on cosmological scales, their role in neutron star physics is largely under-... |
0901.4465 | Pac\^ome Delva Dr. | P. Delva and M.-C. Angonin | Extended Fermi coordinates | 16 pages, 1 figure | null | 10.1007/s10714-011-1272-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the notion of Fermi coordinates to a generalized definition in
which the highest orders are described by arbitrary functions. From this
definition rises a formalism that naturally gives coordinate transformation
formulae. Some examples are developped in which the extended Fermi coordinates
simplify the metr... | [
{
"created": "Wed, 28 Jan 2009 14:11:57 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Jul 2010 10:53:32 GMT",
"version": "v2"
}
] | 2015-05-13 | [
[
"Delva",
"P.",
""
],
[
"Angonin",
"M. -C.",
""
]
] | We extend the notion of Fermi coordinates to a generalized definition in which the highest orders are described by arbitrary functions. From this definition rises a formalism that naturally gives coordinate transformation formulae. Some examples are developped in which the extended Fermi coordinates simplify the metric... |
2110.15951 | Raghvendra Singh | Raghvendra Singh and Dawood Kothawala | Covariant formulation of Generalised Uncertainty Principle | 6 pages, 3 figures, published as a Letter in Physical Review D | Phys. Rev. D 105, L101501 (2022) | 10.1103/PhysRevD.105.L101501 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present a formulation of the generalised uncertainty principle based on
commutator $\left[ {\hat x}^i, {\hat p}_j \right]$ between position and
momentum operators defined in a covariant manner using normal coordinates. We
show how any such commutator can acquire corrections if the momentum space is
curved. The cor... | [
{
"created": "Fri, 29 Oct 2021 17:55:35 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Nov 2021 13:10:09 GMT",
"version": "v2"
},
{
"created": "Wed, 18 May 2022 15:45:21 GMT",
"version": "v3"
}
] | 2022-05-19 | [
[
"Singh",
"Raghvendra",
""
],
[
"Kothawala",
"Dawood",
""
]
] | We present a formulation of the generalised uncertainty principle based on commutator $\left[ {\hat x}^i, {\hat p}_j \right]$ between position and momentum operators defined in a covariant manner using normal coordinates. We show how any such commutator can acquire corrections if the momentum space is curved. The corre... |
2010.08181 | Raul Jimenez | Ali Rida Khalifeh, Raul Jimenez | Spinors and Scalars in curved spacetime: neutrino dark energy
(DE$_{\nu}$) | Matches version accepted by the Journal (Physics of the Dark
Universe) | Physics of the Dark Universe. 31, 100777, 2021 | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the interaction, in general curved spacetime, between a spinor and a
scalar field describing dark energy; the so-called DE$_{\nu}$ model in curved
space. The dominant term is the dimension 5 operator, which results in
different energy shifts for the neutrino states: an Aharonov-Bohm-like effect.
We study the... | [
{
"created": "Fri, 16 Oct 2020 06:03:06 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jan 2021 11:28:21 GMT",
"version": "v2"
}
] | 2022-01-24 | [
[
"Khalifeh",
"Ali Rida",
""
],
[
"Jimenez",
"Raul",
""
]
] | We study the interaction, in general curved spacetime, between a spinor and a scalar field describing dark energy; the so-called DE$_{\nu}$ model in curved space. The dominant term is the dimension 5 operator, which results in different energy shifts for the neutrino states: an Aharonov-Bohm-like effect. We study the p... |
1910.05630 | Elena Giorgi | Elena Giorgi | The linear stability of Reissner-Nordstr\"om spacetime: the full
subextremal range | 45 pages, 1 figure, version accepted for publication | Commun. Math. Phys. 380, 1313-1360 (2020) | 10.1007/s00220-020-03893-z | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove the linear stability of subextremal Reissner-Nordstr\"om spacetimes
as solutions to the Einstein-Maxwell equation. We make use of a novel
representation of gauge-invariant quantities which satisfy a symmetric system
of coupled wave equations. This system is composed of two of the three
equations separately d... | [
{
"created": "Sat, 12 Oct 2019 19:09:02 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Nov 2021 17:04:19 GMT",
"version": "v2"
}
] | 2021-11-29 | [
[
"Giorgi",
"Elena",
""
]
] | We prove the linear stability of subextremal Reissner-Nordstr\"om spacetimes as solutions to the Einstein-Maxwell equation. We make use of a novel representation of gauge-invariant quantities which satisfy a symmetric system of coupled wave equations. This system is composed of two of the three equations separately der... |
1408.5897 | Florian Kuhnel | Florian Kuhnel | Thoughts on the Vacuum Energy in the Quantum N-Portrait | 7 pages; revised version to match published version | Mod.Phys.Lett. A30 (2015) 36, 1550197 | 10.1142/S0217732315501977 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An application of the quantum N-portrait to the Universe is discussed,
wherein the space-time geometry is understood as a Bose-Einstein condensate of
N soft gravitons. If near or at the critical point of a quantum phase
transition, indications are found that the vacuum energy is partly suppressed
by 1/N, as being due... | [
{
"created": "Mon, 25 Aug 2014 20:00:03 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Aug 2015 12:06:34 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Oct 2015 06:47:02 GMT",
"version": "v3"
}
] | 2015-10-22 | [
[
"Kuhnel",
"Florian",
""
]
] | An application of the quantum N-portrait to the Universe is discussed, wherein the space-time geometry is understood as a Bose-Einstein condensate of N soft gravitons. If near or at the critical point of a quantum phase transition, indications are found that the vacuum energy is partly suppressed by 1/N, as being due t... |
gr-qc/0307083 | Martin Bojowald | Martin Bojowald and Ghanashyam Date | Consistency Conditions for Fundamentally Discrete Theories | 33 pages | Class.Quant.Grav. 21 (2004) 121-143 | 10.1088/0264-9381/21/1/009 | IMSc/2003/07/17 | gr-qc hep-th | null | The dynamics of physical theories is usually described by differential
equations. Difference equations then appear mainly as an approximation which
can be used for a numerical analysis. As such, they have to fulfill certain
conditions to ensure that the numerical solutions can reliably be used as
approximations to so... | [
{
"created": "Thu, 17 Jul 2003 15:43:46 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Bojowald",
"Martin",
""
],
[
"Date",
"Ghanashyam",
""
]
] | The dynamics of physical theories is usually described by differential equations. Difference equations then appear mainly as an approximation which can be used for a numerical analysis. As such, they have to fulfill certain conditions to ensure that the numerical solutions can reliably be used as approximations to solu... |
gr-qc/0608118 | Gregory J. Galloway | Gregory J. Galloway | Rigidity of marginally trapped surfaces and the topology of black holes | 11 pages, latex2e; v4: minor corrections, references updated in
preparation for publication; to appear in Commun. Anal. Geom | null | null | null | gr-qc hep-th math.DG | null | In a recent paper (gr-qc/0509107) the author and Rick Schoen obtained a
generalization to higher dimensions of a classical result of Hawking concerning
the topology of black holes. It was proved that, apart from certain exceptional
circumstances, cross sections of the event horizon, in the stationary case, and
'weakl... | [
{
"created": "Mon, 28 Aug 2006 18:01:09 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Mar 2007 12:27:55 GMT",
"version": "v2"
},
{
"created": "Sat, 15 Sep 2007 14:20:00 GMT",
"version": "v3"
},
{
"created": "Mon, 14 Jan 2008 16:05:34 GMT",
"version": "v4"
}
] | 2008-01-14 | [
[
"Galloway",
"Gregory J.",
""
]
] | In a recent paper (gr-qc/0509107) the author and Rick Schoen obtained a generalization to higher dimensions of a classical result of Hawking concerning the topology of black holes. It was proved that, apart from certain exceptional circumstances, cross sections of the event horizon, in the stationary case, and 'weakly ... |
1601.05086 | Carlos O. Lousto | Carlos O. Lousto and James Healy | Unstable flip-flopping spinning binary black holes | 5 pages, 3 figures | Phys. Rev. D 93, 124074 (2016) | 10.1103/PhysRevD.93.124074 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a unified description of the flip-flop effect in spinning binary
black holes and the anti-alignment instability in terms of real and imaginary
flip-flop frequencies. We find that this instability is only effective for mass
ratios $0.5<q<1$. We provide analytic expressions that determine the region of
paramete... | [
{
"created": "Tue, 19 Jan 2016 21:00:00 GMT",
"version": "v1"
}
] | 2016-07-06 | [
[
"Lousto",
"Carlos O.",
""
],
[
"Healy",
"James",
""
]
] | We give a unified description of the flip-flop effect in spinning binary black holes and the anti-alignment instability in terms of real and imaginary flip-flop frequencies. We find that this instability is only effective for mass ratios $0.5<q<1$. We provide analytic expressions that determine the region of parameter ... |
1503.03934 | Tomohiro Harada | Tomohiro Harada, Chul-Moon Yoo, Tomohiro Nakama and Yasutaka Koga | Cosmological long-wavelength solutions and primordial black hole
formation | 33 pages, 4 figures, accepted for publication in Physical Review D | Phys. Rev. D 91, 084057 (2015) | 10.1103/PhysRevD.91.084057 | RUP-15-5, RESCEU-4/15 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct cosmological long-wavelength solutions without symmetry in
general gauge conditions compatible with the long-wavelength scheme. We then
specify the relationship among the solutions in different time slicings.
Applying this general framework to spherical symmetry, we derive the
correspondence relation bet... | [
{
"created": "Fri, 13 Mar 2015 02:22:27 GMT",
"version": "v1"
},
{
"created": "Mon, 11 May 2015 12:24:13 GMT",
"version": "v2"
}
] | 2018-01-25 | [
[
"Harada",
"Tomohiro",
""
],
[
"Yoo",
"Chul-Moon",
""
],
[
"Nakama",
"Tomohiro",
""
],
[
"Koga",
"Yasutaka",
""
]
] | We construct cosmological long-wavelength solutions without symmetry in general gauge conditions compatible with the long-wavelength scheme. We then specify the relationship among the solutions in different time slicings. Applying this general framework to spherical symmetry, we derive the correspondence relation betwe... |
2112.00296 | Ujjal Debnath | Ujjal Debnath | Roles of Modified Chaplygin-Jacobi and Chaplygin-Abel Gases in FRW
Universe | 20 pages, 17 figures, Accepted in Int. J. Mod. Phys. A | null | 10.1142/S0217751X21502456 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We have considered flat Friedmann-Robertson-Walker (FRW) model of the
universe and reviewed the modified Chaplygin gas as the fluid source.
Associated with the scalar field model, we have determined the Hubble parameter
as a generating function in terms of the scalar field. Instead of hyperbolic
function, we have tak... | [
{
"created": "Wed, 1 Dec 2021 06:12:04 GMT",
"version": "v1"
}
] | 2021-12-02 | [
[
"Debnath",
"Ujjal",
""
]
] | We have considered flat Friedmann-Robertson-Walker (FRW) model of the universe and reviewed the modified Chaplygin gas as the fluid source. Associated with the scalar field model, we have determined the Hubble parameter as a generating function in terms of the scalar field. Instead of hyperbolic function, we have taken... |
1004.0091 | Roland Triay | Roland Triay (CPT) | Dark Energy: fiction or reality? | 9 pages, Invited talk at Tenth International Symposium Frontiers of
Fundamental and Computational Physics (FFP10) Perth, Western Australia,
November 24-26, 2009 | AIP Conf.Proc.1246:105-113,2010 | 10.1063/1.3460185 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Is Dark Energy justified as an alternative to the cosmological constant
$\Lambda$ in order to explain the acceleration of the cosmic expansion ? It
turns out that a straightforward dimensional analysis of Einstein equation
provides us with clear evidences that the geometrical nature of $\Lambda$ is
the only viable so... | [
{
"created": "Thu, 1 Apr 2010 09:23:36 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Triay",
"Roland",
"",
"CPT"
]
] | Is Dark Energy justified as an alternative to the cosmological constant $\Lambda$ in order to explain the acceleration of the cosmic expansion ? It turns out that a straightforward dimensional analysis of Einstein equation provides us with clear evidences that the geometrical nature of $\Lambda$ is the only viable sour... |
1410.3109 | Alessandro Fabbri | G. Clement and A. Fabbri | An alternative scenario for critical scalar field collapse in $AdS_3$ | 6 pages; Invited talk at ICHEP2014, Valencia July 2014, Parallel
Session `Formal Theory Developments' | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of gravitational collapse and black hole formation, we
reconsider the problem to describe analytically the critical collapse of a
massless and minimally coupled scalar field in $2+1$ gravity.
| [
{
"created": "Sun, 12 Oct 2014 16:04:26 GMT",
"version": "v1"
}
] | 2014-10-14 | [
[
"Clement",
"G.",
""
],
[
"Fabbri",
"A.",
""
]
] | In the context of gravitational collapse and black hole formation, we reconsider the problem to describe analytically the critical collapse of a massless and minimally coupled scalar field in $2+1$ gravity. |
0708.3563 | Hrvoje Nikolic | H. Nikolic | Renormalization of vacuum energy in linearized quantum gravity | 5 pages | null | null | null | gr-qc hep-th | null | In linearized quantum gravity, a shift of the average energy-momentum can be
compensated by a shift of the average gravitational field. This allows a
renormalization scheme that naturally removes the contribution of quantum
vacuum fluctuations to the cosmological constant, solving the old
cosmological-constant proble... | [
{
"created": "Mon, 27 Aug 2007 09:40:47 GMT",
"version": "v1"
}
] | 2007-08-28 | [
[
"Nikolic",
"H.",
""
]
] | In linearized quantum gravity, a shift of the average energy-momentum can be compensated by a shift of the average gravitational field. This allows a renormalization scheme that naturally removes the contribution of quantum vacuum fluctuations to the cosmological constant, solving the old cosmological-constant problem ... |
1903.05982 | Matteo Breschi | Matteo Breschi, Richard O'Shaughnessy, Jacob Lange and Ofek Birnholtz | Inspiral-Merger-Ringdown Consistency Tests with Higher Modes on
Gravitational Signals from the Second Observing Run of LIGO and Virgo | null | null | 10.1088/1361-6382/ab5629 | LIGO-P1800365 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Current tests of General Relativity are performed using approximations which
neglect a key feature of complete solution of Einstein's theory: higher-order
modes. Our analysis will reassess these tests, including these higher-order
mode effects. We have chosen to perform inspiral-merger-ringdown consistency
tests on t... | [
{
"created": "Thu, 14 Mar 2019 13:27:55 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Breschi",
"Matteo",
""
],
[
"O'Shaughnessy",
"Richard",
""
],
[
"Lange",
"Jacob",
""
],
[
"Birnholtz",
"Ofek",
""
]
] | Current tests of General Relativity are performed using approximations which neglect a key feature of complete solution of Einstein's theory: higher-order modes. Our analysis will reassess these tests, including these higher-order mode effects. We have chosen to perform inspiral-merger-ringdown consistency tests on the... |
2007.16186 | Tucker Manton | Damien A. Easson, Cynthia Keeler, Tucker Manton | The classical double copy of non-singular black holes | 42 pages, 15 figures. References added, matches version accepted for
publication in PRD | Phys. Rev. D 102, 086015 (2020) | 10.1103/PhysRevD.102.086015 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the classical double copy procedure to a class of regular,
non-singular black hole solutions. We give several examples, paying particular
attention to a string-theory-corrected black hole solution emerging from
T-duality. Non-perturbative stringy corrections introduce an ultraviolet (UV)
zero-point length cu... | [
{
"created": "Fri, 31 Jul 2020 17:28:53 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Sep 2020 16:22:35 GMT",
"version": "v2"
}
] | 2020-10-21 | [
[
"Easson",
"Damien A.",
""
],
[
"Keeler",
"Cynthia",
""
],
[
"Manton",
"Tucker",
""
]
] | We apply the classical double copy procedure to a class of regular, non-singular black hole solutions. We give several examples, paying particular attention to a string-theory-corrected black hole solution emerging from T-duality. Non-perturbative stringy corrections introduce an ultraviolet (UV) zero-point length cuto... |
2003.13724 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou, F.P. Fronimos | Rectifying Einstein-Gauss-Bonnet Inflation in View of GW170817 | NPB Accepted | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we introduce a new theoretical framework for
Einstein-Gauss-Bonnet theories of gravity, which results to particularly
elegant, functionally simple and transparent gravitational equations of motion,
slow-roll indices and the corresponding observational indices. The main
requirement is that the Einstein-Ga... | [
{
"created": "Mon, 30 Mar 2020 18:20:42 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Jul 2020 20:12:21 GMT",
"version": "v2"
}
] | 2020-07-28 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
],
[
"Fronimos",
"F. P.",
""
]
] | In this work we introduce a new theoretical framework for Einstein-Gauss-Bonnet theories of gravity, which results to particularly elegant, functionally simple and transparent gravitational equations of motion, slow-roll indices and the corresponding observational indices. The main requirement is that the Einstein-Gaus... |
2207.10339 | Riasat Ali | Riasat Ali, Rimsha Babar, Muhammad Asgher and Xia Tie-Cheng | Tunneling Analysis of Regular Black Holes with Cosmic Strings-Like
Solution in Newman-Janis Algorithm | 12 pages,7 figures, version accepted for publication in International
Journal of Modern Physics A | null | 10.1142/S0217751X22501081 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We consider the regular black holes solution with cosmic strings(RBHCS) in
the rotation parameter by assuming the Newman-Janis method. After this, we
study thermodynamical property (i.e., Hawking temperature $T_H$) for the RBHCS
in the presence of spin parameter. Moreover, we study the graphical
interpretation of Haw... | [
{
"created": "Thu, 21 Jul 2022 07:28:45 GMT",
"version": "v1"
}
] | 2022-07-22 | [
[
"Ali",
"Riasat",
""
],
[
"Babar",
"Rimsha",
""
],
[
"Asgher",
"Muhammad",
""
],
[
"Tie-Cheng",
"Xia",
""
]
] | We consider the regular black holes solution with cosmic strings(RBHCS) in the rotation parameter by assuming the Newman-Janis method. After this, we study thermodynamical property (i.e., Hawking temperature $T_H$) for the RBHCS in the presence of spin parameter. Moreover, we study the graphical interpretation of Hawki... |
gr-qc/0201064 | Marcelo Salgado | Marcelo Salgado | Dynamics of spherically symmetric spacetimes: hydrodynamics and
radiation | submitted to Phys. Rev. D, 46 pages, RevTex file, no figures | Phys.Rev.D66:044013,2002 | 10.1103/PhysRevD.66.044013 | null | gr-qc astro-ph | null | Using the 3+1 formalism of general relativity we obtain the equations
governing the dynamics of spherically symmetric spacetimes with arbitrary
sources. We then specialize for the case of perfect fluids accompanied by a
flow of interacting massless or massive particles (e.g. neutrinos) which are
described in terms of... | [
{
"created": "Fri, 18 Jan 2002 22:54:52 GMT",
"version": "v1"
}
] | 2010-05-12 | [
[
"Salgado",
"Marcelo",
""
]
] | Using the 3+1 formalism of general relativity we obtain the equations governing the dynamics of spherically symmetric spacetimes with arbitrary sources. We then specialize for the case of perfect fluids accompanied by a flow of interacting massless or massive particles (e.g. neutrinos) which are described in terms of r... |
2101.03594 | Ozgur Delice | Hatice \"Ozer, \"Ozg\"ur Delice | Gravitational waves in Brans-Dicke Theory with a cosmological constant | V2: 30 pages, Revtex 4-1, References are added, discussion is
extended, section III-D is added, Published version | Eur. Phys. J. C (2021) 81: 326 | 10.1140/epjc/s10052-021-09123-7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Weak field gravitational wave solutions are investigated in Brans-Dicke (BD)
theory in the presence of a cosmological constant. In this setting the
background geometry is not flat but asymptotically de-Sitter. We investigate
the linearised field equations, and their gravitational wave solutions in a
certain gauge cho... | [
{
"created": "Sun, 10 Jan 2021 18:25:36 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Apr 2021 17:57:30 GMT",
"version": "v2"
}
] | 2021-04-28 | [
[
"Özer",
"Hatice",
""
],
[
"Delice",
"Özgür",
""
]
] | Weak field gravitational wave solutions are investigated in Brans-Dicke (BD) theory in the presence of a cosmological constant. In this setting the background geometry is not flat but asymptotically de-Sitter. We investigate the linearised field equations, and their gravitational wave solutions in a certain gauge choic... |
1707.04953 | Vladimir S. Manko | V. S. Manko, E. Ruiz | Simple metric for a magnetized, spinning, deformed mass | 13 pages, 1 figure; minor changes, one reference added | Phys. Rev. D 97, 104016 (2018) | 10.1103/PhysRevD.97.104016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present and discuss a 4-parameter stationary axisymmetric solution of the
Einstein-Maxwell equations able to describe the exterior field of a rotating
magnetized deformed mass. The solution arises as a system of two overlapping
corotating magnetized non-equal black holes or hyperextreme disks and we write
it in a ... | [
{
"created": "Sun, 16 Jul 2017 22:11:53 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Jul 2017 06:50:47 GMT",
"version": "v2"
}
] | 2018-05-23 | [
[
"Manko",
"V. S.",
""
],
[
"Ruiz",
"E.",
""
]
] | We present and discuss a 4-parameter stationary axisymmetric solution of the Einstein-Maxwell equations able to describe the exterior field of a rotating magnetized deformed mass. The solution arises as a system of two overlapping corotating magnetized non-equal black holes or hyperextreme disks and we write it in a co... |
1503.05405 | Michalis Agathos | Michalis Agathos, Jeroen Meidam, Walter Del Pozzo, Tjonnie G. F. Li,
Marco Tompitak, John Veitch, Salvatore Vitale, Chris Van Den Broeck | Constraining the neutron star equation of state with gravitational wave
signals from coalescing binary neutron stars | 18 pages, 12 figures, revised version accepted for publication in
Phys. Rev. D | Phys. Rev. D 92, 023012 (2015) | 10.1103/PhysRevD.92.023012 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently exploratory studies were performed on the possibility of
constraining the neutron star equation of state (EOS) using signals from
coalescing binary neutron stars, or neutron star-black hole systems, as they
will be seen in upcoming advanced gravitational wave detectors such as Advanced
LIGO and Advanced Virg... | [
{
"created": "Wed, 18 Mar 2015 13:39:55 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Jul 2015 14:53:38 GMT",
"version": "v2"
}
] | 2015-08-05 | [
[
"Agathos",
"Michalis",
""
],
[
"Meidam",
"Jeroen",
""
],
[
"Del Pozzo",
"Walter",
""
],
[
"Li",
"Tjonnie G. F.",
""
],
[
"Tompitak",
"Marco",
""
],
[
"Veitch",
"John",
""
],
[
"Vitale",
"Salvatore",
""
],... | Recently exploratory studies were performed on the possibility of constraining the neutron star equation of state (EOS) using signals from coalescing binary neutron stars, or neutron star-black hole systems, as they will be seen in upcoming advanced gravitational wave detectors such as Advanced LIGO and Advanced Virgo.... |
1706.07460 | Alexander Zhidenko | K. D. Kokkotas, R. A. Konoplya, A. Zhidenko | An analytical approximation for the Einstein-dilaton-Gauss-Bonnet black
hole metric | 8 pages, 3 figures, 1 ancillary Mathematica(R) notebook; the refereed
version, accepted for publication in Physical Review D | Phys. Rev. D 96, 064004 (2017) | 10.1103/PhysRevD.96.064004 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct an analytical approximation for the numerical black hole metric
of P. Kanti, et. al. [PRD54, 5049 (1996)] in the four-dimensional
Einstein-dilaton-Gauss-Bonnet (EdGB) theory. The continued fraction expansion
in terms of a compactified radial coordinate, used here, converges slowly when
the dilaton coupli... | [
{
"created": "Thu, 22 Jun 2017 19:00:07 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Aug 2017 23:00:27 GMT",
"version": "v2"
}
] | 2017-09-06 | [
[
"Kokkotas",
"K. D.",
""
],
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | We construct an analytical approximation for the numerical black hole metric of P. Kanti, et. al. [PRD54, 5049 (1996)] in the four-dimensional Einstein-dilaton-Gauss-Bonnet (EdGB) theory. The continued fraction expansion in terms of a compactified radial coordinate, used here, converges slowly when the dilaton coupling... |
gr-qc/0602031 | Sunil Maharaj | A. J. John and S. D. Maharaj | An exact isotropic solution | 7 pages, to appear in Il Nuovo Cimento B | Nuovo Cim. B121 (2006) 27-33 | 10.1393/ncb/i2005-10179-y | null | gr-qc | null | The condition for pressure isotropy is reduced to a recurrence equation with
variable, rational coefficients of order three. We prove that this difference
equation can be solved in general. Consequently we can find an exact solution
to the field equations corresponding to a static spherically symmetric
gravitational ... | [
{
"created": "Wed, 8 Feb 2006 13:42:59 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"John",
"A. J.",
""
],
[
"Maharaj",
"S. D.",
""
]
] | The condition for pressure isotropy is reduced to a recurrence equation with variable, rational coefficients of order three. We prove that this difference equation can be solved in general. Consequently we can find an exact solution to the field equations corresponding to a static spherically symmetric gravitational po... |
gr-qc/0701089 | Chen Songbai | Songbai Chen, Bin Wang, Rukeng Su | Influence of Lorentz violation on Dirac quasinormal modes in the
Schwarzschild black hole spacetime | 10 pages, 4 figure | Class.Quant.Grav.23:7581-7590,2006 | 10.1088/0264-9381/23/24/026 | null | gr-qc | null | Using the third-order WKB approximation and monodromy methods, we investigate
the influence of Lorentz violating coefficient $b$ (associated with a special
axial-vector $b_{\mu}$ field) on Dirac quasinormal modes in the Schwarzschild
black hole spacetime. At fundamental overtone, the real part decreases linearly
as t... | [
{
"created": "Tue, 16 Jan 2007 01:36:27 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Chen",
"Songbai",
""
],
[
"Wang",
"Bin",
""
],
[
"Su",
"Rukeng",
""
]
] | Using the third-order WKB approximation and monodromy methods, we investigate the influence of Lorentz violating coefficient $b$ (associated with a special axial-vector $b_{\mu}$ field) on Dirac quasinormal modes in the Schwarzschild black hole spacetime. At fundamental overtone, the real part decreases linearly as the... |
1703.07649 | Sourav Bhattacharya | Sourav Bhattacharya and Theodore N Tomaras | Cosmic structure sizes in generic dark energy models | v2, 19pp; added references and discussions, improved presentation;
accepted in EPJC | Eur. Phys. J. C (2017) 77: 526 | 10.1140/epjc/s10052-017-5102-4 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The maximum allowable size of a spherical cosmic structure as a function of
its mass is determined by the maximum turn around radius $R_{\rm TA,max}$, the
distance from its centre where the attraction on a radial test particle due to
the spherical mass is balanced with the repulsion due to the ambient dark
energy. In... | [
{
"created": "Tue, 21 Mar 2017 05:47:00 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jul 2017 04:17:28 GMT",
"version": "v2"
}
] | 2017-08-14 | [
[
"Bhattacharya",
"Sourav",
""
],
[
"Tomaras",
"Theodore N",
""
]
] | The maximum allowable size of a spherical cosmic structure as a function of its mass is determined by the maximum turn around radius $R_{\rm TA,max}$, the distance from its centre where the attraction on a radial test particle due to the spherical mass is balanced with the repulsion due to the ambient dark energy. In t... |
2009.11107 | Raj Patil | Raj Patil | EFT approach to general relativity: correction to EIH Lagrangian due to
electromagnetic charge | null | Gen Relativ Gravit 52, 95 (2020) | 10.1007/s10714-020-02748-1 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the Non-Relativistic formulation of General Relativity (NRGR) given
in Goldberger et al. (Phys Rev D 73:104029, 2006) to incorporate the effects of
electromagnetic charge of the constituents of the binary. We incorporate the
photon field in NRGR by giving the field decomposition and power counting
rules. Us... | [
{
"created": "Wed, 23 Sep 2020 12:35:56 GMT",
"version": "v1"
}
] | 2020-09-24 | [
[
"Patil",
"Raj",
""
]
] | We extend the Non-Relativistic formulation of General Relativity (NRGR) given in Goldberger et al. (Phys Rev D 73:104029, 2006) to incorporate the effects of electromagnetic charge of the constituents of the binary. We incorporate the photon field in NRGR by giving the field decomposition and power counting rules. Usin... |
2405.17350 | Jose Socorro Garcia | J. Socorro, J. Juan Rosales and Leonel Toledo-Sesma | Non commutative classical and Quantum fractionary Cosmology: Anisotropic
Bianchi Type I case | 28 pages, 23 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | In this work, we will explore the effects of non-commutativity in fractional
classical and quantum schemes using the anisotropicc Bianchi Type I
cosmological model coupled to a scalar field in the K-essence formalism. We
introduce non-commutative variables considering that all minisuperspace
variables $q^i_{nc}$ do n... | [
{
"created": "Mon, 27 May 2024 16:54:43 GMT",
"version": "v1"
}
] | 2024-05-28 | [
[
"Socorro",
"J.",
""
],
[
"Rosales",
"J. Juan",
""
],
[
"Toledo-Sesma",
"Leonel",
""
]
] | In this work, we will explore the effects of non-commutativity in fractional classical and quantum schemes using the anisotropicc Bianchi Type I cosmological model coupled to a scalar field in the K-essence formalism. We introduce non-commutative variables considering that all minisuperspace variables $q^i_{nc}$ do not... |
1910.08544 | Diego Blas | Diego Blas, Diana L\'opez Nacir, Sergey Sibiryakov | Secular effects of Ultralight Dark Matter on Binary Pulsars | 24 pages, 3 figures, 3 tables; in v2 we introduced new
clarifications, updated fig. 3 to include current bounds and agrees with the
published version | Phys. Rev. D 101, 063016 (2020) | 10.1103/PhysRevD.101.063016 | CERN-TH-2019-165, INR-TH-2019-018, KCL-PH-TH/2019-77 | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dark matter (DM) can consist of very light bosons behaving as a classical
scalar field that experiences coherent oscillations. The presence of this DM
field would perturb the dynamics of celestial bodies, either because the
(oscillating) DM stress tensor modifies the gravitational potentials of the
galaxy, or if DM i... | [
{
"created": "Fri, 18 Oct 2019 10:02:54 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Feb 2020 18:56:19 GMT",
"version": "v2"
}
] | 2020-03-18 | [
[
"Blas",
"Diego",
""
],
[
"Nacir",
"Diana López",
""
],
[
"Sibiryakov",
"Sergey",
""
]
] | Dark matter (DM) can consist of very light bosons behaving as a classical scalar field that experiences coherent oscillations. The presence of this DM field would perturb the dynamics of celestial bodies, either because the (oscillating) DM stress tensor modifies the gravitational potentials of the galaxy, or if DM is ... |
1711.00605 | Marcony Silva Cunha | V. B. Bezerra, H. R. Christiansen, M. S. Cunha, C. R. Muniz, M. O.
Tahim | Thermal Casimir effect in Kerr spacetime with quintessence and massive
gravitons | 15 pages, 4 figures | Eur.Phys.J. C77 (2017) no.11, 787 | 10.1140/epjc/s10052-017-5378-4 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from an analytical expression for the Helmholtz free energy we
calculate the thermal corrections to the Casimir energy-density and entropy
within nearby ideal parallel plates in the vacuum of a massless scalar field.
Our framework is the Kerr spacetime in the presence of quintessence and massive
gravitons. T... | [
{
"created": "Thu, 2 Nov 2017 03:19:21 GMT",
"version": "v1"
}
] | 2017-11-23 | [
[
"Bezerra",
"V. B.",
""
],
[
"Christiansen",
"H. R.",
""
],
[
"Cunha",
"M. S.",
""
],
[
"Muniz",
"C. R.",
""
],
[
"Tahim",
"M. O.",
""
]
] | Starting from an analytical expression for the Helmholtz free energy we calculate the thermal corrections to the Casimir energy-density and entropy within nearby ideal parallel plates in the vacuum of a massless scalar field. Our framework is the Kerr spacetime in the presence of quintessence and massive gravitons. The... |
0711.3575 | Kenta Kiuchi | Kenta Kiuchi and Hisa-aki Shinkai | Numerical experiments of adjusted BSSN systems for controlling
constraint violations | to be published in PRD | Phys.Rev.D77:044010,2008 | 10.1103/PhysRevD.77.044010 | null | gr-qc astro-ph | null | We present our numerical comparisons between the BSSN formulation widely used
in numerical relativity today and its adjusted versions using constraints. We
performed three testbeds: gauge-wave, linear wave, and Gowdy-wave tests,
proposed by the Mexico workshop on the formulation problem of the Einstein
equations. We ... | [
{
"created": "Thu, 22 Nov 2007 14:01:24 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Jan 2008 11:01:02 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Kiuchi",
"Kenta",
""
],
[
"Shinkai",
"Hisa-aki",
""
]
] | We present our numerical comparisons between the BSSN formulation widely used in numerical relativity today and its adjusted versions using constraints. We performed three testbeds: gauge-wave, linear wave, and Gowdy-wave tests, proposed by the Mexico workshop on the formulation problem of the Einstein equations. We tr... |
2201.03381 | Yu-Xiao Liu | Si-Jiang Yang, Yu-Peng Zhang, Shao-Wen Wei, Yu-Xiao Liu | Destroying the event horizon of a nonsingular rotating quantum-corrected
black hole | 19 pages, 1 figure, published version | JHEP 04 (2022) 066 | 10.1007/JHEP04(2022)066 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The destruction of the event horizon of a nonsingular black hole, which is
not prevented by the weak cosmic censorship conjecture, might provide us the
possibility to access quantum regime of gravity inside black hole. We
investigate the possibility of overspinning a nonsingular rotating
quantum-corrected black hole ... | [
{
"created": "Mon, 10 Jan 2022 15:03:08 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Apr 2022 12:39:33 GMT",
"version": "v2"
}
] | 2022-04-21 | [
[
"Yang",
"Si-Jiang",
""
],
[
"Zhang",
"Yu-Peng",
""
],
[
"Wei",
"Shao-Wen",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | The destruction of the event horizon of a nonsingular black hole, which is not prevented by the weak cosmic censorship conjecture, might provide us the possibility to access quantum regime of gravity inside black hole. We investigate the possibility of overspinning a nonsingular rotating quantum-corrected black hole by... |
2310.11072 | Karim Thebault | Nick Huggett and Karim P. Y. Th\'ebault | Finding Time for Wheeler-DeWitt Cosmology | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We conduct a case study analysis of a proposal for the emergence of time
based upon the approximate derivation of three grades of temporal structure
within an explicit quantum cosmological model which obeys a Wheeler-DeWitt type
equation without an extrinsic time parameter. Our main focus will be issues
regarding the... | [
{
"created": "Tue, 17 Oct 2023 08:38:40 GMT",
"version": "v1"
}
] | 2023-10-18 | [
[
"Huggett",
"Nick",
""
],
[
"Thébault",
"Karim P. Y.",
""
]
] | We conduct a case study analysis of a proposal for the emergence of time based upon the approximate derivation of three grades of temporal structure within an explicit quantum cosmological model which obeys a Wheeler-DeWitt type equation without an extrinsic time parameter. Our main focus will be issues regarding the c... |
gr-qc/0610118 | Francisco Lobo | Francisco S. N. Lobo | Van der Waals quintessence stars | 8 pages, 1 figure, Revtex4. V2: clarifying comments and references
added, now 9 pages | Phys.Rev.D75:024023,2007 | 10.1103/PhysRevD.75.024023 | null | gr-qc astro-ph hep-th | null | The van der Waals quintessence equation of state is an interesting scenario
for describing the late universe, and seems to provide a solution to the puzzle
of dark energy, without the presence of exotic fluids or modifications of the
Friedmann equations. In this work, the construction of inhomogeneous compact
spheres... | [
{
"created": "Wed, 25 Oct 2006 13:28:53 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jan 2007 19:31:03 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Lobo",
"Francisco S. N.",
""
]
] | The van der Waals quintessence equation of state is an interesting scenario for describing the late universe, and seems to provide a solution to the puzzle of dark energy, without the presence of exotic fluids or modifications of the Friedmann equations. In this work, the construction of inhomogeneous compact spheres s... |
gr-qc/0609097 | Lorenzo Iorio | Lorenzo Iorio | A comment on the paper "On the orbit of the LARES satellite", by I.
Ciufolini | LaTex, 7 pages, no figures, 1 table. It refers to gr-qc/0609081 by I.
Ciufolini. Quotation from such paper added: in it Ciufolini explicitly claims
that his nearly polar LARES would be sufficient, without using LAGEOS and
LAGEOS II. Typos corrected. Reference added. Style improved. Clarifications
added. To appe... | Planet.SpaceSci.55:1198-1200,2007 | 10.1016/j.pss.2007.03.005 | null | gr-qc astro-ph physics.geo-ph physics.space-ph | null | In this note we comment on a recent paper by I.Ciufolini about the
possibility of placing the proposed terrestrial satellite LARES in a
low-altitude, nearly polar orbit in order to measure the general relativistic
Lense-Thirring effect with its node. Ciufolini claims that, for a departure of
4 deg in the satellite's ... | [
{
"created": "Thu, 21 Sep 2006 23:35:34 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Nov 2006 19:09:50 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Nov 2006 18:09:09 GMT",
"version": "v3"
},
{
"created": "Thu, 22 Feb 2007 00:35:00 GMT",
"version": "v4"
},
{
"c... | 2008-11-26 | [
[
"Iorio",
"Lorenzo",
""
]
] | In this note we comment on a recent paper by I.Ciufolini about the possibility of placing the proposed terrestrial satellite LARES in a low-altitude, nearly polar orbit in order to measure the general relativistic Lense-Thirring effect with its node. Ciufolini claims that, for a departure of 4 deg in the satellite's in... |
2008.05019 | Matthew Duez | Matthew D. Duez, Alexander Knight, Francois Foucart, Milad Haddadi,
Jerred Jesse, Francois Hebert, Lawrence E. Kidder, Harald P. Pfeiffer, and
Mark A. Scheel | A comparison of momentum transport models for numerical relativity | 15 pagers, 11 figures | Phys. Rev. D 102, 104050 (2020) | 10.1103/PhysRevD.102.104050 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main problems of nonvacuum numerical relativity, compact binary mergers
and stellar collapse, involve hydromagnetic instabilities and turbulent flows,
so that kinetic energy at small scales have mean effects at large scale that
drive the secular evolution. Notable among these effects is momentum transport.
We inv... | [
{
"created": "Tue, 11 Aug 2020 22:23:25 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Dec 2020 18:56:19 GMT",
"version": "v2"
}
] | 2020-12-15 | [
[
"Duez",
"Matthew D.",
""
],
[
"Knight",
"Alexander",
""
],
[
"Foucart",
"Francois",
""
],
[
"Haddadi",
"Milad",
""
],
[
"Jesse",
"Jerred",
""
],
[
"Hebert",
"Francois",
""
],
[
"Kidder",
"Lawrence E.",
""
... | The main problems of nonvacuum numerical relativity, compact binary mergers and stellar collapse, involve hydromagnetic instabilities and turbulent flows, so that kinetic energy at small scales have mean effects at large scale that drive the secular evolution. Notable among these effects is momentum transport. We inves... |
1208.0025 | Davood Momeni Dr | Mubasher Jamil, D. Momeni, Ratbay Myrzakulov | Stability of a non-minimally conformally coupled scalar field in F(T)
cosmology | 12 pages, 9 figures, 1 table | Eur. Phys. J. C (2012) 72:2075 | 10.1140/epjc/s10052-012-2075-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we introduce a non-minimally conformally coupled scalar field
and dark matter in F(T) cosmology and study their dynamics. We investigate the
stability and phase space behavior of the parameters of the scalar field by
choosing an exponential potential and cosmologically viable form of F(T). We
found tha... | [
{
"created": "Mon, 30 Jul 2012 03:57:15 GMT",
"version": "v1"
}
] | 2012-08-02 | [
[
"Jamil",
"Mubasher",
""
],
[
"Momeni",
"D.",
""
],
[
"Myrzakulov",
"Ratbay",
""
]
] | In this paper, we introduce a non-minimally conformally coupled scalar field and dark matter in F(T) cosmology and study their dynamics. We investigate the stability and phase space behavior of the parameters of the scalar field by choosing an exponential potential and cosmologically viable form of F(T). We found that ... |
2112.13855 | Yusuke Manita | Yusuke Manita and Rampei Kimura | Linear growth of structure in projected massive gravity | 16 pages, 5 figures. v2: typos corrected | null | 10.1103/PhysRevD.105.084038 | KUNS-2911 | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | In the present paper, we investigate the linear growth of matter fluctuations
based on a concrete model of the projected massive gravity, which is free of
the Boulware-Deser ghost and preserves the global Lorentz symmetry. We found
that at subhorizon scales, the modification to the linear growth is strongly
suppresse... | [
{
"created": "Mon, 27 Dec 2021 19:00:03 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Jun 2022 10:14:02 GMT",
"version": "v2"
}
] | 2022-06-07 | [
[
"Manita",
"Yusuke",
""
],
[
"Kimura",
"Rampei",
""
]
] | In the present paper, we investigate the linear growth of matter fluctuations based on a concrete model of the projected massive gravity, which is free of the Boulware-Deser ghost and preserves the global Lorentz symmetry. We found that at subhorizon scales, the modification to the linear growth is strongly suppressed ... |
1612.05999 | Zbigniew Haba | Z. Haba | Thermodynamics of diffusive DM/DE systems | 20 pages | Gen.Relativ.Gravit (2017) 49:58 | 10.1007/s10714-017-2224-9 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the energy density,temperature and entropy of dark matter (DM) and
dark energy (DE) as functions of the scale factor $a$ in an expanding universe.
In a model of non-interacting dark components we repeat a derivation from
thermodynamics of the well-known relations between the energy density,entropy
and temp... | [
{
"created": "Sun, 18 Dec 2016 21:49:54 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Mar 2017 13:07:31 GMT",
"version": "v2"
}
] | 2017-03-27 | [
[
"Haba",
"Z.",
""
]
] | We discuss the energy density,temperature and entropy of dark matter (DM) and dark energy (DE) as functions of the scale factor $a$ in an expanding universe. In a model of non-interacting dark components we repeat a derivation from thermodynamics of the well-known relations between the energy density,entropy and temper... |
2111.13883 | Zhi-Chao Zhao | Zhi-Chao Zhao and Zhoujian Cao | Stochastic gravitational wave background due to gravitational wave
memory | 21 pages, 3 figures | null | 10.1007/s11433-022-1965-y | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Gravitational wave memory is an important prediction of general relativity,
which has not been detected yet. Amounts of memory events can form a stochastic
gravitational wave memory background. Here we find that memory background can
be described as a Brownian motion in the condition that the observation time is
long... | [
{
"created": "Sat, 27 Nov 2021 12:41:13 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Dec 2021 13:33:37 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Dec 2022 16:28:29 GMT",
"version": "v3"
}
] | 2022-12-12 | [
[
"Zhao",
"Zhi-Chao",
""
],
[
"Cao",
"Zhoujian",
""
]
] | Gravitational wave memory is an important prediction of general relativity, which has not been detected yet. Amounts of memory events can form a stochastic gravitational wave memory background. Here we find that memory background can be described as a Brownian motion in the condition that the observation time is longer... |
1305.5831 | Ehoud Pazy | Ehoud Pazy | Considerations for a cosmological extension of modified Newtonian
dynamics connections to conformal gravity and Rindler force theories | 23 pages, No figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified Newtonian dynamics (MOND) can be obtained by modifying the entropic
formulation of gravity, this is achieved by considering the quantum statistical
nature of the degrees of freedom on the holographic screen. Through this frame
work, we find some constraints on a cosmological extension for MOND, with no
addit... | [
{
"created": "Fri, 24 May 2013 19:19:33 GMT",
"version": "v1"
}
] | 2013-05-27 | [
[
"Pazy",
"Ehoud",
""
]
] | Modified Newtonian dynamics (MOND) can be obtained by modifying the entropic formulation of gravity, this is achieved by considering the quantum statistical nature of the degrees of freedom on the holographic screen. Through this frame work, we find some constraints on a cosmological extension for MOND, with no additio... |
2209.11317 | Anthony Brady PhD | Anthony J. Brady, Ivan Agullo, Dimitrios Kranas | Symplectic circuits, entanglement, and stimulated Hawking radiation in
analog gravity | 25 + 10 pages and 21 figures. Comments welcome | null | 10.1103/PhysRevD.106.105021 | null | gr-qc cond-mat.stat-mech quant-ph | http://creativecommons.org/licenses/by/4.0/ | We introduce a convenient set of analytical tools (the Gaussian formalism)
and diagrams (symplectic circuits) to analyze multi-mode scattering events in
analog gravity, such as pair-creation a l\'a Hawking by black hole and white
hole analog event horizons. The diagrams prove to be valuable ansatzes for the
scatterin... | [
{
"created": "Thu, 22 Sep 2022 21:16:17 GMT",
"version": "v1"
}
] | 2022-12-14 | [
[
"Brady",
"Anthony J.",
""
],
[
"Agullo",
"Ivan",
""
],
[
"Kranas",
"Dimitrios",
""
]
] | We introduce a convenient set of analytical tools (the Gaussian formalism) and diagrams (symplectic circuits) to analyze multi-mode scattering events in analog gravity, such as pair-creation a l\'a Hawking by black hole and white hole analog event horizons. The diagrams prove to be valuable ansatzes for the scattering ... |
1904.03129 | Shao-Wen Wei | Shao-Wen Wei, Jie Yang, Yu-Xiao Liu | Geodesics and periodic orbits in Kehagias-Sfetsos black holes in
deformed Ho\u{r}ava-Lifshitz gravity | 12 pages, 8 figures, and 2 tables, accepted by PRD | Phys. Rev. D 99, 104016 (2019) | 10.1103/PhysRevD.99.104016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The motion of a massive test particle around a Kehagias-Sfetsos black hole in
deformed Ho\u{r}ava-Lifshitz gravity is studied. Employing the effective
potential, the marginally bound orbits and the innermost stable circular orbits
are analyzed. For the marginally bound orbits, their radius and angular
momentum decrea... | [
{
"created": "Fri, 5 Apr 2019 15:47:14 GMT",
"version": "v1"
},
{
"created": "Wed, 29 May 2019 03:32:42 GMT",
"version": "v2"
}
] | 2019-05-30 | [
[
"Wei",
"Shao-Wen",
""
],
[
"Yang",
"Jie",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | The motion of a massive test particle around a Kehagias-Sfetsos black hole in deformed Ho\u{r}ava-Lifshitz gravity is studied. Employing the effective potential, the marginally bound orbits and the innermost stable circular orbits are analyzed. For the marginally bound orbits, their radius and angular momentum decrease... |
1111.6821 | Cenalo Vaz | Cenalo Vaz and Louis Witten | Canonical Quantization of Spherically Symmetric Dust Collapse | 19 pages no figures. Contribution to a festschrift in honor of Joshua
N. Goldberg | Gen.Rel.Grav.43:3429,2011 | 10.1007/s10714-011-1240-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravity effects are likely to play a crucial role in determining the
outcome of gravitational collapse during its final stages. In this contribution
we will outline a canonical quantization of the LeMaitre-Tolman-Bondi models,
which describe the collapse of spherical, inhomogeneous, non-rotating dust.
Althoug... | [
{
"created": "Tue, 29 Nov 2011 14:26:43 GMT",
"version": "v1"
}
] | 2011-12-01 | [
[
"Vaz",
"Cenalo",
""
],
[
"Witten",
"Louis",
""
]
] | Quantum gravity effects are likely to play a crucial role in determining the outcome of gravitational collapse during its final stages. In this contribution we will outline a canonical quantization of the LeMaitre-Tolman-Bondi models, which describe the collapse of spherical, inhomogeneous, non-rotating dust. Although ... |
gr-qc/9811007 | Roland Steinbauer | Michael Kunzinger, Roland Steinbauer | A note on the Penrose junction conditions | 9 pages, RevTeX, no figures, final version (typos corrected,
references updated) | Class.Quant.Grav. 16 (1999) 1255-1264 | 10.1088/0264-9381/16/4/013 | UWThPh-1998-57 | gr-qc math-ph math.MP | null | Impulsive pp-waves are commonly described either by a distributional
spacetime metric or, alternatively, by a continuous one. The transformation $T$
relating these forms clearly has to be discontinuous, which causes two basic
problems: First, it changes the manifold structure and second, the pullback of
the distribut... | [
{
"created": "Tue, 3 Nov 1998 08:59:53 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Apr 1999 13:12:12 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Kunzinger",
"Michael",
""
],
[
"Steinbauer",
"Roland",
""
]
] | Impulsive pp-waves are commonly described either by a distributional spacetime metric or, alternatively, by a continuous one. The transformation $T$ relating these forms clearly has to be discontinuous, which causes two basic problems: First, it changes the manifold structure and second, the pullback of the distributio... |
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