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1807.09135 | Hor\'acio Vieira | H. S. Vieira, V. B. Bezerra, C. R. Muniz and M. S. Cunha | Resonant frequencies of a charged scalar field in the
Garfinkle-Horowitz-Strominger dilaton black hole | 30 pages, 10 figures | Int. J. Mod. Phys. D 28, 1950151 (2019) | 10.1142/S0218271819501517 | null | gr-qc cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the exact analytical solution of the radial part of the Klein-Gordon
equation describing a charged massive scalar field in the electrically charged
Garfinkle-Horowitz-Strominger dilaton black hole spacetime, given in terms of
the confluent Heun functions, to study the physical phenomena related to
resonant fre... | [
{
"created": "Tue, 24 Jul 2018 14:13:27 GMT",
"version": "v1"
},
{
"created": "Sat, 27 Apr 2019 12:56:01 GMT",
"version": "v2"
},
{
"created": "Sat, 5 Oct 2019 22:46:36 GMT",
"version": "v3"
}
] | 2019-10-08 | [
[
"Vieira",
"H. S.",
""
],
[
"Bezerra",
"V. B.",
""
],
[
"Muniz",
"C. R.",
""
],
[
"Cunha",
"M. S.",
""
]
] | We use the exact analytical solution of the radial part of the Klein-Gordon equation describing a charged massive scalar field in the electrically charged Garfinkle-Horowitz-Strominger dilaton black hole spacetime, given in terms of the confluent Heun functions, to study the physical phenomena related to resonant frequ... |
2105.08084 | Leonhard Kehrberger | Leonhard M. A. Kehrberger | The Case Against Smooth Null Infinity II: A Logarithmically Modified
Price's Law | 34 pages, 3 figures | null | null | null | gr-qc hep-th math-ph math.AP math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we expand on results from our previous paper "The Case Against
Smooth Null Infinity I: Heuristics and Counter-Examples" [1] by showing that
the failure of "peeling" (and, thus, of smooth null infinity) in a
neighbourhood of $i^0$ derived therein translates into logarithmic corrections
at leading order ... | [
{
"created": "Mon, 17 May 2021 18:00:19 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jul 2021 15:50:41 GMT",
"version": "v2"
}
] | 2021-07-12 | [
[
"Kehrberger",
"Leonhard M. A.",
""
]
] | In this paper, we expand on results from our previous paper "The Case Against Smooth Null Infinity I: Heuristics and Counter-Examples" [1] by showing that the failure of "peeling" (and, thus, of smooth null infinity) in a neighbourhood of $i^0$ derived therein translates into logarithmic corrections at leading order to... |
2307.04633 | Anirban Chatterjee | Anirban Chatterjee, Saddam Hussain and Kaushik Bhattacharya | Realizing late-time cosmology in the context of Dynamical Stability
Approach | 4 pages and 4 figures; Conference proceeding for XXV DAE-BRNS HEP
Symposium 2022 | Springer Proceedings in Physics (SPPHY, volume 304), 2024 | 10.1007/978-981-97-0289-3_66 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We examine the scenario of non-minimally coupled relativistic fluid and
$k$-essence scalar field in a flat Friedmann-Lemaitre-Robertson-Walker
universe. By adding a non-minimal coupling term in the Lagrangian level, we
study the variation of Lagrangian with respect to independent variables, which
produces modified sc... | [
{
"created": "Tue, 4 Jul 2023 18:37:18 GMT",
"version": "v1"
}
] | 2024-07-23 | [
[
"Chatterjee",
"Anirban",
""
],
[
"Hussain",
"Saddam",
""
],
[
"Bhattacharya",
"Kaushik",
""
]
] | We examine the scenario of non-minimally coupled relativistic fluid and $k$-essence scalar field in a flat Friedmann-Lemaitre-Robertson-Walker universe. By adding a non-minimal coupling term in the Lagrangian level, we study the variation of Lagrangian with respect to independent variables, which produces modified scal... |
gr-qc/9801076 | N. K. Dadhich | Naresh Dadhich, L.K. Patel and Ramesh Tikekar | A duality relation for fluid spacetime | 5 pages, LaTeX version, Accepted in Classical Quantum Gravity as a
Letter | Class.Quant.Grav.15:L27-L29,1998 | 10.1088/0264-9381/15/4/001 | IUCAA-5/98 | gr-qc | null | We consider the electromagnetic resolution of gravitational field. We show
that under the duality transformation, in which active and passive electric
parts of the Riemann curvature are interchanged, a fluid spacetime in comoving
coordinates remains invariant in its character with density and pressure
transforming, w... | [
{
"created": "Thu, 22 Jan 1998 09:54:46 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Dadhich",
"Naresh",
""
],
[
"Patel",
"L. K.",
""
],
[
"Tikekar",
"Ramesh",
""
]
] | We consider the electromagnetic resolution of gravitational field. We show that under the duality transformation, in which active and passive electric parts of the Riemann curvature are interchanged, a fluid spacetime in comoving coordinates remains invariant in its character with density and pressure transforming, whi... |
gr-qc/0510125 | Matt Visser | Stefano Liberati (Sissa, Trieste and INFN, Italy), Matt Visser
(Victoria University of Wellington), Silke Weinfurtner (Victoria University
of Wellington) | Analogue quantum gravity phenomenology from a two-component
Bose-Einstein condensate | V1: 36 pages, uses iopart.sty; V2: 31 pages, presentation simplified,
conclusions clarified, discussion of some side issues eliminated, several
references added, this version to appear in Classical and Quantum Gravity | Class.Quant.Grav. 23 (2006) 3129-3154 | 10.1088/0264-9381/23/9/023 | null | gr-qc | null | We present an analogue spacetime model that reproduces the salient features
of the most common ansatz for quantum gravity phenomenology. We do this by
investigating a system of two coupled Bose-Einstein condensates. This system
can be tuned to have two "phonon" modes (one massive, one massless) which share
the same l... | [
{
"created": "Sun, 30 Oct 2005 06:28:37 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Mar 2006 23:56:08 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Liberati",
"Stefano",
"",
"Sissa, Trieste and INFN, Italy"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
],
[
"Weinfurtner",
"Silke",
"",
"Victoria University\n of Wellington"
]
] | We present an analogue spacetime model that reproduces the salient features of the most common ansatz for quantum gravity phenomenology. We do this by investigating a system of two coupled Bose-Einstein condensates. This system can be tuned to have two "phonon" modes (one massive, one massless) which share the same lim... |
gr-qc/9603062 | null | M. A. Clayton | Linearisation Instabilities of the Massive Nonsymmetric Gravitational
Theory | 14 pages, IOP style for submission to CQG. Minor changes and
additional background material added | Class.Quant.Grav. 13 (1996) 2851-2864 | 10.1088/0264-9381/13/10/020 | UTPT-96-04 | gr-qc | null | The massive nonsymmetric gravitational theory is shown to posses a
linearisation instability at purely GR field configurations, disallowing the
use of the linear approximation in these situations. It is also shown that
arbitrarily small antisymmetric sector Cauchy data leads to singular evolution
unless an ad hoc con... | [
{
"created": "Fri, 29 Mar 1996 22:17:36 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Jul 1996 16:58:50 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Clayton",
"M. A.",
""
]
] | The massive nonsymmetric gravitational theory is shown to posses a linearisation instability at purely GR field configurations, disallowing the use of the linear approximation in these situations. It is also shown that arbitrarily small antisymmetric sector Cauchy data leads to singular evolution unless an ad hoc condi... |
1810.04103 | Kimet Jusufi | Sumarna Haroon, Mubasher Jamil, Kimet Jusufi, Kai Lin, Robert B. Mann | Shadow and Deflection Angle of Rotating Black Holes in Perfect Fluid
Dark Matter with a Cosmological Constant | 15 pages, 4 figures. Accepted for publication in Physical Review D | Phys. Rev. D 99, 044015 (2019) | 10.1103/PhysRevD.99.044015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The presence of dark matter around a black hole remarkably affects its
spacetime. We consider the effects of dark matter on the shadow of a new
solution to the Einstein equations that describes a rotating black hole in the
background of perfect dark matter fluid (PFDM), along with its extension to
nonzero cosmologica... | [
{
"created": "Tue, 9 Oct 2018 16:20:55 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Jan 2019 15:36:04 GMT",
"version": "v2"
}
] | 2019-02-12 | [
[
"Haroon",
"Sumarna",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Jusufi",
"Kimet",
""
],
[
"Lin",
"Kai",
""
],
[
"Mann",
"Robert B.",
""
]
] | The presence of dark matter around a black hole remarkably affects its spacetime. We consider the effects of dark matter on the shadow of a new solution to the Einstein equations that describes a rotating black hole in the background of perfect dark matter fluid (PFDM), along with its extension to nonzero cosmological ... |
2109.04147 | Diego Fern\'andez-Silvestre | Diego Fern\'andez-Silvestre, Joshua Foo, and Michael R.R. Good | On the duality of Schwarzschild-de Sitter spacetime and moving mirror | 11 pages, 4 figures | Class. Quantum Grav. 39 055006 (2022) | 10.1088/1361-6382/ac4b03 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The Schwarzschild-de Sitter (SdS) metric is the simplest spacetime solution
in general relativity with both a black hole event horizon and a cosmological
event horizon. Since the Schwarzschild metric is the most simple solution of
Einstein's equations with spherical symmetry and the de Sitter metric is the
most simpl... | [
{
"created": "Thu, 9 Sep 2021 10:13:09 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Feb 2022 13:30:25 GMT",
"version": "v2"
}
] | 2022-02-15 | [
[
"Fernández-Silvestre",
"Diego",
""
],
[
"Foo",
"Joshua",
""
],
[
"Good",
"Michael R. R.",
""
]
] | The Schwarzschild-de Sitter (SdS) metric is the simplest spacetime solution in general relativity with both a black hole event horizon and a cosmological event horizon. Since the Schwarzschild metric is the most simple solution of Einstein's equations with spherical symmetry and the de Sitter metric is the most simple ... |
0711.3811 | Mikhail Smolyakov | Mikhail N. Smolyakov | A small cosmological constant from the modified Brans-Dicke theory - an
interplay between different energy scales | 10 pages, LaTeX, references added | null | null | null | gr-qc astro-ph hep-th | null | In this paper we discuss a model in which the energy density, corresponding
to the effective cosmological constant, after the $SU(2)\times U(1)$ symmetry
breaking appears to be of the desired order of $10^{-48}\div 10^{-47} GeV^{4}$.
The model contain two different energy scales, one of which is associated with
the H... | [
{
"created": "Mon, 26 Nov 2007 20:22:08 GMT",
"version": "v1"
},
{
"created": "Sun, 2 Dec 2007 21:29:28 GMT",
"version": "v2"
}
] | 2007-12-02 | [
[
"Smolyakov",
"Mikhail N.",
""
]
] | In this paper we discuss a model in which the energy density, corresponding to the effective cosmological constant, after the $SU(2)\times U(1)$ symmetry breaking appears to be of the desired order of $10^{-48}\div 10^{-47} GeV^{4}$. The model contain two different energy scales, one of which is associated with the Hig... |
2203.08545 | Gareth Cabourn Davies | Gareth S. Cabourn Davies, Ian W. Harry | Establishing significance of gravitational-wave signals from a single
observatory in the PyCBC offline search | 25 pages, 9 figures, 6 tables | null | 10.1088/1361-6382/ac8862 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave observations of compact binary coalescences are allowing
us to see black holes and neutron stars further into the universe and recent
results represent the most sensitive searches for compact objects ever
undertaken. Most searches for gravitational waves from compact binary
coalescence currently re... | [
{
"created": "Wed, 16 Mar 2022 11:09:10 GMT",
"version": "v1"
}
] | 2022-10-19 | [
[
"Davies",
"Gareth S. Cabourn",
""
],
[
"Harry",
"Ian W.",
""
]
] | Gravitational-wave observations of compact binary coalescences are allowing us to see black holes and neutron stars further into the universe and recent results represent the most sensitive searches for compact objects ever undertaken. Most searches for gravitational waves from compact binary coalescence currently rely... |
2104.09725 | Yan-Gang Miao | Xin-Chang Cai, Yan-Gang Miao | Quasinormal modes and shadows of a new family of
Ay\'{o}n-Beato-Garc\'{\i}a black holes | v1: 20 pages, 9 figures; v2: 24 pages, 11 figures, 2 tables, final
version to appear in Physical Review D | Phys. Rev. D 103, 124050 (2021) | 10.1103/PhysRevD.103.124050 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain a type of Ay\'{o}n-Beato-Garc\'{\i}a (ABG) related black hole
solutions with five parameters: the mass $m$, the charge $q$, and three
dimensionless parameters $\alpha$, $\beta$ and $\gamma$ associated with
nonlinear electrodynamics. We find that this type of black holes is regular
under the conditions: $\al... | [
{
"created": "Tue, 20 Apr 2021 02:40:33 GMT",
"version": "v1"
},
{
"created": "Mon, 31 May 2021 01:42:17 GMT",
"version": "v2"
}
] | 2021-06-30 | [
[
"Cai",
"Xin-Chang",
""
],
[
"Miao",
"Yan-Gang",
""
]
] | We obtain a type of Ay\'{o}n-Beato-Garc\'{\i}a (ABG) related black hole solutions with five parameters: the mass $m$, the charge $q$, and three dimensionless parameters $\alpha$, $\beta$ and $\gamma$ associated with nonlinear electrodynamics. We find that this type of black holes is regular under the conditions: $\alph... |
2012.11923 | H\'ector Estell\'es | H\'ector Estell\'es, Sascha Husa, Marta Colleoni, David Keitel, Maite
Mateu-Lucena, Cecilio Garc\'ia-Quir\'os, Antoni Ramos-Buades, Angela Borchers | Time domain phenomenological model of gravitational wave subdominant
harmonics for quasi-circular non-precessing binary black hole coalescences | 22 pages, 18 figures. https://dcc.ligo.org/P2000524 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work we present an extension of the time domain phenomenological
model IMRPhenomT for gravitational wave signals from binary black hole
coalescences to include subdominant harmonics, specifically the $(l=2, m=\pm
1)$, $(l=3, m=\pm 3)$, $(l=4, m=\pm 4)$ and $(l=5, m=\pm 5)$ spherical
harmonics. We also improve... | [
{
"created": "Tue, 22 Dec 2020 10:46:45 GMT",
"version": "v1"
}
] | 2020-12-23 | [
[
"Estellés",
"Héctor",
""
],
[
"Husa",
"Sascha",
""
],
[
"Colleoni",
"Marta",
""
],
[
"Keitel",
"David",
""
],
[
"Mateu-Lucena",
"Maite",
""
],
[
"García-Quirós",
"Cecilio",
""
],
[
"Ramos-Buades",
"Antoni",
... | In this work we present an extension of the time domain phenomenological model IMRPhenomT for gravitational wave signals from binary black hole coalescences to include subdominant harmonics, specifically the $(l=2, m=\pm 1)$, $(l=3, m=\pm 3)$, $(l=4, m=\pm 4)$ and $(l=5, m=\pm 5)$ spherical harmonics. We also improve o... |
gr-qc/0612104 | Parampreet Singh | Abhay Ashtekar, Tomasz Pawlowski, Parampreet Singh, Kevin Vandersloot | Loop quantum cosmology of k=1 FRW models | Typos corrected. To appear in Physical Review D | Phys.Rev.D75:024035,2007 | 10.1103/PhysRevD.75.024035 | IGPG-06/12-1 | gr-qc hep-th | null | The closed, k=1, FRW model coupled to a massless scalar field is investigated
in the framework of loop quantum cosmology using analytical and numerical
methods. As in the k=0 case, the scalar field can be again used as emergent
time to construct the physical Hilbert space and introduce Dirac observables.
The resultin... | [
{
"created": "Mon, 18 Dec 2006 16:18:04 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jan 2007 16:53:32 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Pawlowski",
"Tomasz",
""
],
[
"Singh",
"Parampreet",
""
],
[
"Vandersloot",
"Kevin",
""
]
] | The closed, k=1, FRW model coupled to a massless scalar field is investigated in the framework of loop quantum cosmology using analytical and numerical methods. As in the k=0 case, the scalar field can be again used as emergent time to construct the physical Hilbert space and introduce Dirac observables. The resulting ... |
gr-qc/0411105 | Andrei Zorin | V. Pervushin, V. Zinchuk, A. Zorin | Conformal Relativity: Theory and Observations | Invited talk on the International Conference ``Hadron Structure'04'',
August 29 - September 03, Smolenice, Slovakia, 2004 | null | null | null | gr-qc | null | Theoretical and observational arguments are listed in favor of a new
principle of relativity of units of measurements as the basis of a
conformal-invariant unification of General Relativity and Standard Model by
replacement of all masses with a scalar (dilaton) field. The relative units
mean conformal observables: th... | [
{
"created": "Mon, 22 Nov 2004 13:33:09 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pervushin",
"V.",
""
],
[
"Zinchuk",
"V.",
""
],
[
"Zorin",
"A.",
""
]
] | Theoretical and observational arguments are listed in favor of a new principle of relativity of units of measurements as the basis of a conformal-invariant unification of General Relativity and Standard Model by replacement of all masses with a scalar (dilaton) field. The relative units mean conformal observables: the ... |
0712.1578 | Badri Krishnan | Sanjeev Dhurandhar, Badri Krishnan, Himan Mukhopadhyay, John T. Whelan | The cross-correlation search for periodic gravitational waves | 17 pages, 1 figure, RevTeX4 | Phys.Rev.D77:082001,2008 | 10.1103/PhysRevD.77.082001 | LIGO-P070140-00-Z, AEI-2007-158 | gr-qc | null | In this paper we study the use of cross-correlations between multiple
gravitational wave (GW) data streams for detecting long-lived periodic signals.
Cross-correlation searches between data from multiple detectors have
traditionally been used to search for stochastic GW signals, but recently they
have also been used ... | [
{
"created": "Mon, 10 Dec 2007 19:47:52 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Dhurandhar",
"Sanjeev",
""
],
[
"Krishnan",
"Badri",
""
],
[
"Mukhopadhyay",
"Himan",
""
],
[
"Whelan",
"John T.",
""
]
] | In this paper we study the use of cross-correlations between multiple gravitational wave (GW) data streams for detecting long-lived periodic signals. Cross-correlation searches between data from multiple detectors have traditionally been used to search for stochastic GW signals, but recently they have also been used in... |
0805.2384 | Kazuhiro Yamamoto | K Yamamoto, T Uchiyama, S Miyoki, M Ohashi, K Kuroda, H Ishitsuka, T
Akutsu, S Telada, T Tomaru, T Suzuki, N Sato, Y Saito, Y Higashi, T Haruyama,
A Yamamoto, T Shintomi, D Tatsumi, M Ando, H Tagoshi, N Kanda, N Awaya, S
Yamagishi, H Takahashi, A Araya, A Takamori, S Takemoto, T Higashi, H
Hayakawa, W Morii and... | Current status of the CLIO project | 8 pages, 9 figures. Amaldi7 proceedings, J. Phys.: Conf. Ser.
(accepted) | J.Phys.Conf.Ser.122:012002,2008 | 10.1088/1742-6596/122/1/012002 | null | gr-qc physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | CLIO (Cryogenic Laser Interferometer Observatory) is a Japanese gravitational
wave detector project. One of the main purposes of CLIO is to demonstrate
thermal-noise suppression by cooling mirrors for a future Japanese project,
LCGT (Large-scale Cryogenic Gravitational Telescope). The CLIO site is in
Kamioka mine, as... | [
{
"created": "Thu, 15 May 2008 19:23:29 GMT",
"version": "v1"
}
] | 2008-11-07 | [
[
"Yamamoto",
"K",
""
],
[
"Uchiyama",
"T",
""
],
[
"Miyoki",
"S",
""
],
[
"Ohashi",
"M",
""
],
[
"Kuroda",
"K",
""
],
[
"Ishitsuka",
"H",
""
],
[
"Akutsu",
"T",
""
],
[
"Telada",
"S",
""
],... | CLIO (Cryogenic Laser Interferometer Observatory) is a Japanese gravitational wave detector project. One of the main purposes of CLIO is to demonstrate thermal-noise suppression by cooling mirrors for a future Japanese project, LCGT (Large-scale Cryogenic Gravitational Telescope). The CLIO site is in Kamioka mine, as i... |
2404.02208 | S\'ergio Vinicius Monteiro Castelo Branco Xavier | S\'ergio V. M. C. B. Xavier, Carlos A. R. Herdeiro, Lu\'is
C.B.Crispino | Traversable wormholes and light rings | 9 pages, 3 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Ultracompact objects (UCOs) are horizonless compact objects that present
light rings (LRs) - circular photon orbits. As a result, they could be black
hole mimickers. Some years ago, Cunha et al. established a theorem stating
that, under general assumptions, UCOs formed from smooth, quasi-Minkowski
initial data, must ... | [
{
"created": "Tue, 2 Apr 2024 18:02:51 GMT",
"version": "v1"
}
] | 2024-04-04 | [
[
"Xavier",
"Sérgio V. M. C. B.",
""
],
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Crispino",
"Luís C. B.",
""
]
] | Ultracompact objects (UCOs) are horizonless compact objects that present light rings (LRs) - circular photon orbits. As a result, they could be black hole mimickers. Some years ago, Cunha et al. established a theorem stating that, under general assumptions, UCOs formed from smooth, quasi-Minkowski initial data, must ha... |
2305.17129 | Nicolas Lecoeur | Eugeny Babichev, Christos Charmousis, Nicolas Lecoeur | Rotating black holes embedded in a cosmological background for
scalar-tensor theories | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present solutions of DHOST theories describing a rotating black hole
embedded in an expanding universe. The solution is constructed by conformal
transformation of a stealth Kerr(-de Sitter) black hole. The conformal factor
depends explicitly on the scalar field -- but not on its derivative -- and
defines the new t... | [
{
"created": "Fri, 26 May 2023 17:52:16 GMT",
"version": "v1"
}
] | 2023-05-29 | [
[
"Babichev",
"Eugeny",
""
],
[
"Charmousis",
"Christos",
""
],
[
"Lecoeur",
"Nicolas",
""
]
] | We present solutions of DHOST theories describing a rotating black hole embedded in an expanding universe. The solution is constructed by conformal transformation of a stealth Kerr(-de Sitter) black hole. The conformal factor depends explicitly on the scalar field -- but not on its derivative -- and defines the new the... |
0901.0010 | Andrew DeBenedictis | J. Brannlund, S. Kloster, A. DeBenedictis | The Evolution of $\Lambda$ Black Holes in the Mini-Superspace
Approximation of Loop Quantum Gravity | 26 pages, 7 figures.V2 has typos corrected, references added, and a
more careful analysis of the planar case. Accepted for publication in
Physical Review D | Phys.Rev.D79:084023,2009 | 10.1103/PhysRevD.79.084023 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the improved quantization technique to the mini-superspace
approximation of loop quantum gravity, we study the evolution of black holes
supported by a cosmological constant. The addition of a cosmological constant
allows for classical solutions with planar, cylindrical, toroidal and higher
genus black holes. He... | [
{
"created": "Tue, 30 Dec 2008 21:01:01 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Mar 2009 21:42:11 GMT",
"version": "v2"
}
] | 2009-11-06 | [
[
"Brannlund",
"J.",
""
],
[
"Kloster",
"S.",
""
],
[
"DeBenedictis",
"A.",
""
]
] | Using the improved quantization technique to the mini-superspace approximation of loop quantum gravity, we study the evolution of black holes supported by a cosmological constant. The addition of a cosmological constant allows for classical solutions with planar, cylindrical, toroidal and higher genus black holes. Here... |
1701.03686 | Fredy Dubeibe | Eduar A. Becerra, F. L. Dubeibe, Guillermo A. Gonz\'alez | On the Influence of the Mass Definition in the Stability of Axisymmetric
Relativistic Thin Disks | 10 pages, 7 figures. Accepted for publication in Rev. Acad. Colomb.
Cienc. Ex. Fis. Nat | Rev. Acad. Colomb. Cienc. Ex. Fis. Nat. 41 (158) pp.22-29, 2017 | 10.18257/raccefyn.416 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The study on the stability of relativistic disks is one of the most important
criteria for the characterization of astrophysically relevant galactic or
accretion disks models. In this paper, we perform an analysis of the stability
of static axisymmetric relativistic thin disks, by introducing a first-order
perturbati... | [
{
"created": "Fri, 13 Jan 2017 14:31:01 GMT",
"version": "v1"
}
] | 2017-04-04 | [
[
"Becerra",
"Eduar A.",
""
],
[
"Dubeibe",
"F. L.",
""
],
[
"González",
"Guillermo A.",
""
]
] | The study on the stability of relativistic disks is one of the most important criteria for the characterization of astrophysically relevant galactic or accretion disks models. In this paper, we perform an analysis of the stability of static axisymmetric relativistic thin disks, by introducing a first-order perturbation... |
1107.4921 | Yongge Ma | Xiangdong Zhang and Yongge Ma | Loop quantum $f(R)$ theories | 14 pages; published version in PRD | Phys. Rev. D 84 (2011), 064040 | 10.1103/PhysRevD.84.064040 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As modified gravity theories, the 4-dimensional metric $f(R)$ theories are
cast into connection dynamical formalism with real $su(2)$-connections as
configuration variables. This formalism enables us to extend the
non-perturbative loop quantization scheme of general relativity to any metric
$f(R)$ theories. The quant... | [
{
"created": "Mon, 25 Jul 2011 12:31:49 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Sep 2011 12:48:14 GMT",
"version": "v2"
}
] | 2015-05-28 | [
[
"Zhang",
"Xiangdong",
""
],
[
"Ma",
"Yongge",
""
]
] | As modified gravity theories, the 4-dimensional metric $f(R)$ theories are cast into connection dynamical formalism with real $su(2)$-connections as configuration variables. This formalism enables us to extend the non-perturbative loop quantization scheme of general relativity to any metric $f(R)$ theories. The quantum... |
2103.08999 | Irina Bormotova | Irina Bormotova, Elena Kopteva and Zdenek Stuchlik | Geodesic Structure of the Accelerated Stephani Universe | 15 pages, 11 figures | Symmetry 2021, 13(6), 1001 | 10.3390/sym13061001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For the spherically symmetric Stephani cosmological model with an accelerated
expansion, we investigate the main scenarios of the test particle and photon
motion. We show that a comoving observer sees an appropriate picture. In the
case of purely radial motion, the radial velocity decreases slightly with time
due to ... | [
{
"created": "Tue, 16 Mar 2021 11:51:30 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jun 2021 15:52:00 GMT",
"version": "v2"
}
] | 2021-06-14 | [
[
"Bormotova",
"Irina",
""
],
[
"Kopteva",
"Elena",
""
],
[
"Stuchlik",
"Zdenek",
""
]
] | For the spherically symmetric Stephani cosmological model with an accelerated expansion, we investigate the main scenarios of the test particle and photon motion. We show that a comoving observer sees an appropriate picture. In the case of purely radial motion, the radial velocity decreases slightly with time due to th... |
1903.04874 | Edison Cesar De Oliveira Santos | Edison C. Santos, J\'ulio C. Fabris, Jos\'e A. de Freitas Pacheco | Quasi-normal modes of black holes and naked singularities: revisiting
the WKB method | 13 pages, 9 figures, 2 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we revisit the analysis of the ringdown frequencies in the form
of quasi-normal modes for Schwarzschild,Schwarzschild de-Sitter and
Reissner-Nordstr\"om space-times. We plot these frequencies, using the
third-order WKB semi-analytical method against the mass, charge and
cosmological constant for each co... | [
{
"created": "Tue, 12 Mar 2019 12:47:24 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Apr 2019 11:30:08 GMT",
"version": "v2"
},
{
"created": "Fri, 26 Apr 2019 07:39:52 GMT",
"version": "v3"
}
] | 2019-04-29 | [
[
"Santos",
"Edison C.",
""
],
[
"Fabris",
"Júlio C.",
""
],
[
"Pacheco",
"José A. de Freitas",
""
]
] | In this paper we revisit the analysis of the ringdown frequencies in the form of quasi-normal modes for Schwarzschild,Schwarzschild de-Sitter and Reissner-Nordstr\"om space-times. We plot these frequencies, using the third-order WKB semi-analytical method against the mass, charge and cosmological constant for each corr... |
1211.0604 | Hyeong-Chan Kim | Hyeong-Chan Kim | Inflation as an attractor in scalar cosmology | major corrections, 13 pages, 1 figure, add references | MPLA Volume 28, 1350089 (2013) | 10.1142/S0217732313500892 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study an inflation mechanism based on attractor properties in cosmological
evolutions of a spatially flat Friedmann-Robertson-Walker spacetime based on
the Einstein-scalar field theory. We find a new way to get the Hamilton-Jacobi
equation solving the field equations. The equation relates a solution
`generating fu... | [
{
"created": "Sat, 3 Nov 2012 07:31:38 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Nov 2012 11:01:26 GMT",
"version": "v2"
},
{
"created": "Fri, 22 Mar 2013 02:28:57 GMT",
"version": "v3"
}
] | 2013-12-10 | [
[
"Kim",
"Hyeong-Chan",
""
]
] | We study an inflation mechanism based on attractor properties in cosmological evolutions of a spatially flat Friedmann-Robertson-Walker spacetime based on the Einstein-scalar field theory. We find a new way to get the Hamilton-Jacobi equation solving the field equations. The equation relates a solution `generating func... |
gr-qc/0609043 | Ying-Qiu Gu | Ying-Qiu Gu, Bijan Saha | The covariant derivatives and energy momentum tensor of spinors | 7 pages, no figures | null | null | null | gr-qc | null | To understand the coupling behavior of the spinor with spacetime, the
explicit form of the energy-momentum tensor of the spinor in curved spacetime
is important. This problem seems to be overlooked for a long time. In this
paper we derive the explicit form of energy momentum tensors and display some
equivalent but si... | [
{
"created": "Wed, 13 Sep 2006 09:08:58 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Dec 2006 03:33:28 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Gu",
"Ying-Qiu",
""
],
[
"Saha",
"Bijan",
""
]
] | To understand the coupling behavior of the spinor with spacetime, the explicit form of the energy-momentum tensor of the spinor in curved spacetime is important. This problem seems to be overlooked for a long time. In this paper we derive the explicit form of energy momentum tensors and display some equivalent but simp... |
0903.3016 | Adam D. Helfer | Adam Helfer | Angular momentum of isolated systems in general relativity | 17 pages, 1 figure, talk at WCNA 2008, to appear in Journal of
Nonlinear Analysis | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is a write-up of a talk for non-specialists on the treatment of angular
momentum for radiating systems resolving the supertranslation problem.
| [
{
"created": "Tue, 17 Mar 2009 18:30:48 GMT",
"version": "v1"
}
] | 2009-03-18 | [
[
"Helfer",
"Adam",
""
]
] | This is a write-up of a talk for non-specialists on the treatment of angular momentum for radiating systems resolving the supertranslation problem. |
1212.1421 | Fabio Duvan Lora Clavijo Mr. | F. S. Guzman, F. D. Lora-Clavijo, M. D. Morales | Revisiting spherically symmetric relativistic hydrodynamics | Prepared with educative purposes, 15 pages, 34 eps figures | Rev. Mex. Fis. E 58 (2012) 84-98 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we revise two classical examples of Relativistic Hydrodynamics
in order to illustrate in detail the numerical methods commonly used in fluid
dynamics, specifically those designed to deal with shocks, which are based on a
finite volume approximation. The two cases we consider are the relativistic
blast w... | [
{
"created": "Thu, 6 Dec 2012 19:12:10 GMT",
"version": "v1"
}
] | 2012-12-07 | [
[
"Guzman",
"F. S.",
""
],
[
"Lora-Clavijo",
"F. D.",
""
],
[
"Morales",
"M. D.",
""
]
] | In this paper we revise two classical examples of Relativistic Hydrodynamics in order to illustrate in detail the numerical methods commonly used in fluid dynamics, specifically those designed to deal with shocks, which are based on a finite volume approximation. The two cases we consider are the relativistic blast wav... |
2201.09789 | Adri\`a Delhom | Adri\`a Delhom | Theoretical and Observational Aspecs in Metric-Affine Gravity: A field
theoretic perspective | PhD thesis. 300 pages (not includding references). A chapter of the
thesis missing due to content is awaiting to be published. The file will be
updated to include the missing chapter as soon as the content of the chapter
is uploaded to arXiv as a preprint | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | In this PhD thesis we deal with several theoretical and phenomenological
apsects of metric-affine theories of gravity. Concretely, we first give a broad
introduction to the necessary tools to understand the framework and elaborate
on some subtleties of the minimal coupling prescription between geometry and
matter in ... | [
{
"created": "Mon, 24 Jan 2022 16:36:22 GMT",
"version": "v1"
}
] | 2022-01-25 | [
[
"Delhom",
"Adrià",
""
]
] | In this PhD thesis we deal with several theoretical and phenomenological apsects of metric-affine theories of gravity. Concretely, we first give a broad introduction to the necessary tools to understand the framework and elaborate on some subtleties of the minimal coupling prescription between geometry and matter in pr... |
2006.04413 | Chang Liu | Chang Liu, Wen-Hong Ruan, Zong-Kuan Guo | Constraining gravitational-wave polarizations with Taiji | 17 pages, 3 figures. v2: published version | Phys. Rev. D 102, 124050 (2020) | 10.1103/PhysRevD.102.124050 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Space-based gravitational-wave detectors consist of a triangle of three
spacecraft, which makes it possible to detect polarization modes of
gravitational waves due to the motion of the detectors in space. In this paper
we explore the ability of Taiji to detect the polarization modes in the
parametrized post-Einsteini... | [
{
"created": "Mon, 8 Jun 2020 08:39:26 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Dec 2020 10:35:50 GMT",
"version": "v2"
}
] | 2020-12-24 | [
[
"Liu",
"Chang",
""
],
[
"Ruan",
"Wen-Hong",
""
],
[
"Guo",
"Zong-Kuan",
""
]
] | Space-based gravitational-wave detectors consist of a triangle of three spacecraft, which makes it possible to detect polarization modes of gravitational waves due to the motion of the detectors in space. In this paper we explore the ability of Taiji to detect the polarization modes in the parametrized post-Einsteinian... |
1712.01268 | Alexandre Baranov | Alexandre M.Baranov | An interior spherical static solution of Einstein-Maxwell equations | 8 pages, Translation from Russian: Baranov A.M. An interior spherical
static solution of Einstein-Maxwell equations, Krasnoyarsk State University,
Krasnoyarsk, 1973, 9 p. Deposited in VINITI USSR June 5, 1973,
no.6729-73~Dep. (in Russian). Original article submitted in June 5, 1973 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The exact interior static solution of Einstein-Maxwell equations in Bondi's
coordinates for the electrically charged fluid ball is obtained as a source of
the Reissner-Nordstr\"om solution.
| [
{
"created": "Sun, 3 Dec 2017 13:13:20 GMT",
"version": "v1"
}
] | 2017-12-06 | [
[
"Baranov",
"Alexandre M.",
""
]
] | The exact interior static solution of Einstein-Maxwell equations in Bondi's coordinates for the electrically charged fluid ball is obtained as a source of the Reissner-Nordstr\"om solution. |
1903.04744 | Daniel R Terno | Daniel Terno | Self-consistent description of a spherically-symmetric gravitational
collapse | 7 pages, 1 figure. Published version [with a slightly better
notation] | Phys. Rev. D 100, 124025 (2019) | 10.1103/PhysRevD.100.124025 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In spherical symmetry, the total energy-momentum tensor near the apparent
horizon is identified up to a single function of time from two assumptions: a
trapped region forms at a finite time of a distant observer, and values of two
curvature scalars are finite at its boundary. In general relativity, this
energy-moment... | [
{
"created": "Tue, 12 Mar 2019 06:29:11 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jun 2019 02:12:19 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Dec 2019 21:05:58 GMT",
"version": "v3"
}
] | 2019-12-12 | [
[
"Terno",
"Daniel",
""
]
] | In spherical symmetry, the total energy-momentum tensor near the apparent horizon is identified up to a single function of time from two assumptions: a trapped region forms at a finite time of a distant observer, and values of two curvature scalars are finite at its boundary. In general relativity, this energy-momentum... |
1402.3196 | Alejandro Guarnizo | Alejandro Guarnizo, Leonardo Castaneda, Juan M. Tejeiro | Erratum to: Geodesic Deviation Equation in f(R) Gravity | 6 pages, erratum to arXiv:1010.5279v3, and comment to
arXiv:1312.2022v1 | Gen. Rel. Grav. 47:109, 2015 | 10.1007/s10714-015-1948-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of metric $f(R)$ gravity, the Geodesic Deviation Equation
(GDE) was first studied in arXiv:1010.5279v3, giving a general expression and
studying a particular case, the FLRW universe. In the paper arXiv:1312.2022v1 a
similar analysis was made. However, there is a discrepancy in the expressions
for the n... | [
{
"created": "Thu, 13 Feb 2014 16:15:29 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Sep 2015 14:45:10 GMT",
"version": "v2"
}
] | 2015-09-04 | [
[
"Guarnizo",
"Alejandro",
""
],
[
"Castaneda",
"Leonardo",
""
],
[
"Tejeiro",
"Juan M.",
""
]
] | In the context of metric $f(R)$ gravity, the Geodesic Deviation Equation (GDE) was first studied in arXiv:1010.5279v3, giving a general expression and studying a particular case, the FLRW universe. In the paper arXiv:1312.2022v1 a similar analysis was made. However, there is a discrepancy in the expressions for the nul... |
1107.5563 | Toby Wiseman | Gary T. Horowitz and Toby Wiseman | General black holes in Kaluza-Klein theory | 30 pages, Chapter of a book "Black Holes in Higher Dimensions" to be
published by Cambridge University Press (editor: G. Horowitz); v2: references
amended | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A brief review is given of black holes in Kaluza-Klein theory. This includes
both solutions which are homogeneous around the compact extra dimension and
those which are not.
| [
{
"created": "Wed, 27 Jul 2011 19:08:17 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Aug 2011 10:26:17 GMT",
"version": "v2"
}
] | 2011-08-26 | [
[
"Horowitz",
"Gary T.",
""
],
[
"Wiseman",
"Toby",
""
]
] | A brief review is given of black holes in Kaluza-Klein theory. This includes both solutions which are homogeneous around the compact extra dimension and those which are not. |
gr-qc/9404019 | Eric Woolgar | E. Woolgar | The Positivity of Energy for Asymptotically Anti-de Sitter Spacetimes | (Plain TeX - figures not included) | Class.Quant.Grav.11:1881-1900,1994 | 10.1088/0264-9381/11/7/022 | null | gr-qc | null | We use the formulation of asymptotically anti-de Sitter boundary conditions
given by Ashtekar and Magnon to obtain a coordinate expression for the general
asymptotically AdeS metric in a neighbourhood of infinity. From this, we are
able to compute the time delay of null curves propagating near infinity. If the
gravit... | [
{
"created": "Mon, 11 Apr 1994 22:45:16 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Woolgar",
"E.",
""
]
] | We use the formulation of asymptotically anti-de Sitter boundary conditions given by Ashtekar and Magnon to obtain a coordinate expression for the general asymptotically AdeS metric in a neighbourhood of infinity. From this, we are able to compute the time delay of null curves propagating near infinity. If the gravitat... |
gr-qc/9811047 | Valerio Faraoni | Valerio Faraoni, Edgard Gunzig and Pasquale Nardone | Conformal transformations in classical gravitational theories and in
cosmology | LaTeX, 54 pages, no figures. To appear in Fundamentals of Cosmic
Physics | Fund.Cosmic Phys.20:121,1999 | null | IUCAA 24/98 | gr-qc astro-ph hep-th | null | In recent years, the use of conformal transformation techniques has become
widespread in the literature on gravitational theories alternative to general
relativity, on cosmology, and on nonminimally coupled scalar fields. Typically,
the transformation to the Einstein frame is generated by a fundamental scalar
field a... | [
{
"created": "Sat, 14 Nov 1998 17:28:19 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Faraoni",
"Valerio",
""
],
[
"Gunzig",
"Edgard",
""
],
[
"Nardone",
"Pasquale",
""
]
] | In recent years, the use of conformal transformation techniques has become widespread in the literature on gravitational theories alternative to general relativity, on cosmology, and on nonminimally coupled scalar fields. Typically, the transformation to the Einstein frame is generated by a fundamental scalar field alr... |
2404.15537 | Ahmed Errahmani | Ahmed Errahmani, Amine Bouali, Safae Dahmani, Imad El Bojaddaini and
Taoufik Ouali | Constraining dark energy equations of state in $F(R,T)$ gravity | 13 pages, 5 figures | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we examine the acceleration of the Universe's expansion in
$F(R,T)$ gravity, where $R$ denotes the Ricci scalar and $T$ the trace of
energy-momentum tensor. Indeed, the unknown nature of the source controlling
this acceleration in general relativity leads scientists to investigate its
properties by mea... | [
{
"created": "Tue, 23 Apr 2024 21:54:26 GMT",
"version": "v1"
}
] | 2024-04-25 | [
[
"Errahmani",
"Ahmed",
""
],
[
"Bouali",
"Amine",
""
],
[
"Dahmani",
"Safae",
""
],
[
"Bojaddaini",
"Imad El",
""
],
[
"Ouali",
"Taoufik",
""
]
] | In this paper, we examine the acceleration of the Universe's expansion in $F(R,T)$ gravity, where $R$ denotes the Ricci scalar and $T$ the trace of energy-momentum tensor. Indeed, the unknown nature of the source controlling this acceleration in general relativity leads scientists to investigate its properties by means... |
1909.05346 | Alan Coley | A. A. Coley and G. F. R. Ellis | Theoretical Cosmology | Some references updated. Published as Topical Review in CQG | Class. Quant. Grav. v37 013001 (2020) | null | null | gr-qc astro-ph.CO math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review current theoretical cosmology, including fundamental and
mathematical cosmology and physical cosmology (as well as cosmology in the
quantum realm), with an emphasis on open questions.
| [
{
"created": "Wed, 11 Sep 2019 20:44:44 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Sep 2019 17:33:57 GMT",
"version": "v2"
},
{
"created": "Wed, 18 Sep 2019 15:46:31 GMT",
"version": "v3"
},
{
"created": "Sun, 9 Feb 2020 17:59:33 GMT",
"version": "v4"
}
] | 2020-05-26 | [
[
"Coley",
"A. A.",
""
],
[
"Ellis",
"G. F. R.",
""
]
] | We review current theoretical cosmology, including fundamental and mathematical cosmology and physical cosmology (as well as cosmology in the quantum realm), with an emphasis on open questions. |
2306.02974 | Youka Kaku | Youka Kaku, Tomohiro Fujita, and Akira Matsumura | Enhancement of quantum gravity signal in an optomechanical experiment | 18 pages, 7 figures, accepted version in PRD | null | 10.1103/PhysRevD.108.106014 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | No experimental evidence of the quantum nature of gravity has been observed
yet and a realistic setup with improved sensitivity is eagerly awaited. We find
two effects, which can substantially enhance the signal of gravity-induced
quantum entanglement, by examining an optomechanical system in which two
oscillators gr... | [
{
"created": "Mon, 5 Jun 2023 15:37:20 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Dec 2023 08:03:07 GMT",
"version": "v2"
}
] | 2023-12-11 | [
[
"Kaku",
"Youka",
""
],
[
"Fujita",
"Tomohiro",
""
],
[
"Matsumura",
"Akira",
""
]
] | No experimental evidence of the quantum nature of gravity has been observed yet and a realistic setup with improved sensitivity is eagerly awaited. We find two effects, which can substantially enhance the signal of gravity-induced quantum entanglement, by examining an optomechanical system in which two oscillators grav... |
2102.07815 | Lorenzo Iorio | Lorenzo Iorio | Post-Keplerian obliquity variations and the habitability of rocky
planets orbiting fast spinning, oblate late M dwarfs | LaTex2e, 26 pages, 6 figures, no tables. Changes suggested by an
anonymous referee implemented | null | null | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A couple of dozen Earth-like planets orbiting M dwarfs have been discovered
so far. Some of them have attracted interest because of their potential
long-term habitability; such a possibility is currently vigorously debated in
the literature. I show that post-Keplerian (pK) orbit precessions may impact
the habitabilit... | [
{
"created": "Mon, 15 Feb 2021 19:48:07 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Mar 2021 11:53:22 GMT",
"version": "v2"
}
] | 2021-03-19 | [
[
"Iorio",
"Lorenzo",
""
]
] | A couple of dozen Earth-like planets orbiting M dwarfs have been discovered so far. Some of them have attracted interest because of their potential long-term habitability; such a possibility is currently vigorously debated in the literature. I show that post-Keplerian (pK) orbit precessions may impact the habitability ... |
0906.5311 | Valerio Faraoni | Valerio Faraoni (Bishop's Universty) | Reply to `A comment on `The Cauchy problem of f(R) gravity'' | 3 pages, latex | null | 10.1088/0264-9381/26/16/168002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reply to a comment by Capozziello and Vignolo about the Cauchy problem of
Palatini f(R) gravity.
| [
{
"created": "Mon, 29 Jun 2009 16:11:41 GMT",
"version": "v1"
}
] | 2015-05-13 | [
[
"Faraoni",
"Valerio",
"",
"Bishop's Universty"
]
] | We reply to a comment by Capozziello and Vignolo about the Cauchy problem of Palatini f(R) gravity. |
0801.1764 | Iosif Khriplovich | I.B. Khriplovich, A.A. Pomeransky | Does Cosmological Term Influence Gravitational Lensing? | 5 pages, 1 figure | Int.J.Mod.Phys.D17:2255-2259,2008 | 10.1142/S0218271808013832 | null | gr-qc astro-ph | null | We analyze the bending of light by galaxies or clusters of galaxies in the
presence of the cosmological term. Going over to the Friedmann-Robertson-Walker
coordinates, used in fact for the description of actual observations, we
demonstrate that the cosmological constant does not influence practically the
lensing effe... | [
{
"created": "Fri, 11 Jan 2008 12:15:52 GMT",
"version": "v1"
}
] | 2009-02-11 | [
[
"Khriplovich",
"I. B.",
""
],
[
"Pomeransky",
"A. A.",
""
]
] | We analyze the bending of light by galaxies or clusters of galaxies in the presence of the cosmological term. Going over to the Friedmann-Robertson-Walker coordinates, used in fact for the description of actual observations, we demonstrate that the cosmological constant does not influence practically the lensing effect... |
1012.4190 | Gilbert Weinstein | Sergio Dain, Gilbert Weinstein and Sumio Yamada | A counterexample to a Penrose inequality conjectured by Gibbons | null | 2011 Class. Quantum Grav. 28 085015 | 10.1088/0264-9381/28/8/085015 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the Brill-Lindquist initial data provides a counterexample to a
Riemannian Penrose inequality with charge conjectured by G. Gibbons. The
observation illustrates a sub-additive characteristic of the area radii for the
individual connected components of an outermost horizon as a lower bound of the
ADM mass... | [
{
"created": "Sun, 19 Dec 2010 17:55:23 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Dec 2010 01:40:12 GMT",
"version": "v2"
}
] | 2011-05-05 | [
[
"Dain",
"Sergio",
""
],
[
"Weinstein",
"Gilbert",
""
],
[
"Yamada",
"Sumio",
""
]
] | We show that the Brill-Lindquist initial data provides a counterexample to a Riemannian Penrose inequality with charge conjectured by G. Gibbons. The observation illustrates a sub-additive characteristic of the area radii for the individual connected components of an outermost horizon as a lower bound of the ADM mass. |
2109.15003 | Andrey Saveliev | Kumar Ravi, Petar Pavlovi\'c, Andrey Saveliev | On the Non-Minimal Coupling of Magnetic Fields with Gravity in
Schwarzschild Spacetime | 37 pages, 28 figures; corresponds to the published version | Class. Quantum Grav. 40 075016 (2023) | 10.1088/1361-6382/acc0ca | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work we study the effects of non-minimal coupling between
electromagnetism and gravity, which are motivated by quantum effects such as
vacuum polarization. We investigate the modification of both asymptotically
dipole and uniform magnetic fields around a Schwarzschild black hole that come
as the result of non... | [
{
"created": "Thu, 30 Sep 2021 10:57:46 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Mar 2023 20:28:36 GMT",
"version": "v2"
}
] | 2023-03-20 | [
[
"Ravi",
"Kumar",
""
],
[
"Pavlović",
"Petar",
""
],
[
"Saveliev",
"Andrey",
""
]
] | In this work we study the effects of non-minimal coupling between electromagnetism and gravity, which are motivated by quantum effects such as vacuum polarization. We investigate the modification of both asymptotically dipole and uniform magnetic fields around a Schwarzschild black hole that come as the result of non-m... |
gr-qc/0003049 | Gil de Oliveira Neto | G. Oliveira-Neto | Scalar field cosmology in three-dimensions | 11 pages, Revtex, no figues. Change in the physical interpretation of
the solution | Bras. J. Phys. 31 (2001) 456-460 | 10.1590/S0103-97332001000300017 | null | gr-qc | null | We study an analytical solution to the Einstein's equations in
2+1-dimensions. The space-time is dynamical and has a line symmetry. The matter
content is a minimally coupled, massless, scalar field. Depending on the value
of certain parameters, this solution represents three distinct space-times. The
first one is fla... | [
{
"created": "Mon, 13 Mar 2000 14:17:05 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Nov 2001 16:58:38 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Oliveira-Neto",
"G.",
""
]
] | We study an analytical solution to the Einstein's equations in 2+1-dimensions. The space-time is dynamical and has a line symmetry. The matter content is a minimally coupled, massless, scalar field. Depending on the value of certain parameters, this solution represents three distinct space-times. The first one is flat ... |
gr-qc/0404073 | Gil de Oliveira-Neto | J. Acacio de Barros, G. Oliveira-Neto and T. B. Vale | The de Broglie-Bohm Interpretation of Evaporating Black-Holes | Revtex version, 13 pages, no figures | null | null | null | gr-qc | null | In this work we apply the de Broglie-Bohm interpretation of quantum mechanics
to the quantized spherically symmetric black-hole coupled to a massless scalar
field. The wave-functional used was first obtained by Tomimatsu using the
standard ADM quantization and a gauge that places the observer close to the
black-hole ... | [
{
"created": "Fri, 16 Apr 2004 14:39:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Barros",
"J. Acacio",
""
],
[
"Oliveira-Neto",
"G.",
""
],
[
"Vale",
"T. B.",
""
]
] | In this work we apply the de Broglie-Bohm interpretation of quantum mechanics to the quantized spherically symmetric black-hole coupled to a massless scalar field. The wave-functional used was first obtained by Tomimatsu using the standard ADM quantization and a gauge that places the observer close to the black-hole ho... |
1506.07728 | Christian Boehmer | Sebastian Bahamonde, Christian G. Boehmer, Francisco S. N. Lobo, Diego
Saez-Gomez | Generalized $f(R,\phi,X)$ gravity and the late-time cosmic acceleration | 13 pages, 1 figure; slightly revised version, displayed name
corrected. arXiv admin note: text overlap with arXiv:1412.0867 | Universe 1 (2015) 2, 186-198 | 10.3390/universe1020186 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | High-precision observational data have confirmed with startling evidence that
the Universe is currently undergoing a phase of accelerated expansion. This
phase, one of the most important and challenging current problems in cosmology,
represents a new imbalance in the governing gravitational equations.
Historically, p... | [
{
"created": "Thu, 25 Jun 2015 12:40:17 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Aug 2015 11:44:43 GMT",
"version": "v2"
}
] | 2015-08-20 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Boehmer",
"Christian G.",
""
],
[
"Lobo",
"Francisco S. N.",
""
],
[
"Saez-Gomez",
"Diego",
""
]
] | High-precision observational data have confirmed with startling evidence that the Universe is currently undergoing a phase of accelerated expansion. This phase, one of the most important and challenging current problems in cosmology, represents a new imbalance in the governing gravitational equations. Historically, phy... |
gr-qc/0403076 | Steven L. Liebling | Steven L. Liebling | The Nonlinear Sigma Model With Distributed Adaptive Mesh Refinement | 6 pages, 5 figures | Class.Quant.Grav. 21 (2004) 3995 | 10.1088/0264-9381/21/16/012 | null | gr-qc | null | An adaptive mesh refinement (AMR) scheme is implemented in a distributed
environment using Message Passing Interface (MPI) to find solutions to the
nonlinear sigma model. Previous work studied behavior similar to black hole
critical phenomena at the threshold for singularity formation in this flat
space model. This w... | [
{
"created": "Tue, 16 Mar 2004 22:25:36 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Liebling",
"Steven L.",
""
]
] | An adaptive mesh refinement (AMR) scheme is implemented in a distributed environment using Message Passing Interface (MPI) to find solutions to the nonlinear sigma model. Previous work studied behavior similar to black hole critical phenomena at the threshold for singularity formation in this flat space model. This wor... |
0708.0628 | Jonathan R. Gair | Jonathan R Gair, Chao Li, Ilya Mandel | Observable Properties of Orbits in Exact Bumpy Spacetimes | 42 pages, 20 figures, accepted by Phys. Rev. D, v2 has minor changes
to make it consistent with published version | Phys.Rev.D77:024035,2008 | 10.1103/PhysRevD.77.024035 | null | gr-qc | null | We explore the properties of test-particle orbits in "bumpy" spacetimes -
stationary, reflection-symmetric, asymptotically flat solutions of Einstein
equations that have a non-Kerr (anomalous) higher-order multipole-moment
structure but can be tuned arbitrarily close to the Kerr metric. Future
detectors should observ... | [
{
"created": "Sat, 4 Aug 2007 13:48:04 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jan 2008 12:26:16 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Gair",
"Jonathan R",
""
],
[
"Li",
"Chao",
""
],
[
"Mandel",
"Ilya",
""
]
] | We explore the properties of test-particle orbits in "bumpy" spacetimes - stationary, reflection-symmetric, asymptotically flat solutions of Einstein equations that have a non-Kerr (anomalous) higher-order multipole-moment structure but can be tuned arbitrarily close to the Kerr metric. Future detectors should observe ... |
1801.00174 | Morteza Mohseni | Morteza Mohseni | Vacuum polarization in Siklos spacetimes | To appear in Physical Review D | Phys. Rev. D 97, 024006, 2018 | 10.1103/PhysRevD.97.024006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effect of one-loop vacuum polarization on photon propagation in
Siklos spacetimes in the geometric optics limit. We show that for photons with
a general polarization in the transverse plane, the quantum correction vanishes
in spacetimes with $H_{xy}=0$. For photons polarized along a transverse axis,
subl... | [
{
"created": "Sat, 30 Dec 2017 18:28:54 GMT",
"version": "v1"
}
] | 2018-01-10 | [
[
"Mohseni",
"Morteza",
""
]
] | We study the effect of one-loop vacuum polarization on photon propagation in Siklos spacetimes in the geometric optics limit. We show that for photons with a general polarization in the transverse plane, the quantum correction vanishes in spacetimes with $H_{xy}=0$. For photons polarized along a transverse axis, sublum... |
2012.03595 | Carlos A. R. Herdeiro | Carlos A. R. Herdeiro and Eugen Radu | Asymptotically flat, spherical, self-interacting scalar, Dirac and Proca
stars | 23 pages, 7 figures; invited contribution to the Special Issue "Exact
Solutions in Classical Field Theory: Solitons, Black Holes and Boson Stars"
in Symmetry | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We present a comparative analysis of the self-gravitating solitons arising in
the Einstein-Klein-Gordon, Einstein-Dirac and Einstein-Proca models, for the
particular case of static, spherically symmetric spacetimes. Differently from
the previous study arXiv:1708.05674, the matter fields possess suitable
self-interact... | [
{
"created": "Mon, 7 Dec 2020 11:31:32 GMT",
"version": "v1"
}
] | 2020-12-08 | [
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Radu",
"Eugen",
""
]
] | We present a comparative analysis of the self-gravitating solitons arising in the Einstein-Klein-Gordon, Einstein-Dirac and Einstein-Proca models, for the particular case of static, spherically symmetric spacetimes. Differently from the previous study arXiv:1708.05674, the matter fields possess suitable self-interactin... |
gr-qc/9910081 | Hitoshi Kitada | Hitoshi Kitada (University of Tokyo) | A possible solution for the non-existence of time | LaTeX, 7 pages, English corrected and a miscellaneous change in
section 5 | null | null | KIMS-1999-10-17 | gr-qc | null | A possible solution for the problem of non-existence of universal time is
given by utilizing Goedel's incompleteness theorem.
| [
{
"created": "Sat, 23 Oct 1999 23:16:17 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Nov 1999 17:14:34 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Nov 1999 13:01:31 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Kitada",
"Hitoshi",
"",
"University of Tokyo"
]
] | A possible solution for the problem of non-existence of universal time is given by utilizing Goedel's incompleteness theorem. |
1308.4312 | Sanjay Jhingan | Naresh Dadhich, Sushant G. Ghosh and Sanjay Jhingan | Gravitational collapse in pure Lovelock gravity in higher dimensions | 9 pages | Physical Review D 88, 084024 (2013) | 10.1103/PhysRevD.88.084024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study collapse of inhomogeneous dust and null dust (Vaidya radiation) in
pure Lovelock gravity in higher dimensions. Since pure Lovelock gravity is
kinematic in odd d=2N+1 dimension, hence pertinent dimension for the study is
even d=2N+2, where N is degree of Lovelock polynomial. It turns out that pure
Lovelock co... | [
{
"created": "Tue, 20 Aug 2013 14:02:40 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Dadhich",
"Naresh",
""
],
[
"Ghosh",
"Sushant G.",
""
],
[
"Jhingan",
"Sanjay",
""
]
] | We study collapse of inhomogeneous dust and null dust (Vaidya radiation) in pure Lovelock gravity in higher dimensions. Since pure Lovelock gravity is kinematic in odd d=2N+1 dimension, hence pertinent dimension for the study is even d=2N+2, where N is degree of Lovelock polynomial. It turns out that pure Lovelock coll... |
1210.6869 | Madhavan Varadarajan | Casey Tomlin and Madhavan Varadarajan | Towards an Anomaly-Free Quantum Dynamics for a Weak Coupling Limit of
Euclidean Gravity | 57 pages, 9 figures | Phys.Rev. D87 (2013) 4, 044039 | 10.1103/PhysRevD.87.044039 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The G -->0 limit of Euclidean gravity introduced by Smolin is described by a
generally covariant U(1)xU(1)xU(1) gauge theory. The Poisson bracket algebra of
its Hamiltonian and diffeomorphism constraints is isomorphic to that of
gravity. Motivated by recent results in Parameterized Field Theory and by the
search for ... | [
{
"created": "Thu, 25 Oct 2012 15:10:09 GMT",
"version": "v1"
}
] | 2015-01-30 | [
[
"Tomlin",
"Casey",
""
],
[
"Varadarajan",
"Madhavan",
""
]
] | The G -->0 limit of Euclidean gravity introduced by Smolin is described by a generally covariant U(1)xU(1)xU(1) gauge theory. The Poisson bracket algebra of its Hamiltonian and diffeomorphism constraints is isomorphic to that of gravity. Motivated by recent results in Parameterized Field Theory and by the search for an... |
1610.07264 | Matt Visser | Matt Visser (Victoria University of Wellington) | Lorentz invariance and the zero-point stress-energy tensor | V1: 11 pages; V2: 11 pages, 5 references added; V3: 12 pages, 3
references added; V4: 16 pages, 7 references, extra discussion. V5: 18 pages;
new sections added on the renormalization group flow of the Pauli sum rules
and net zero point energy. V6: 1 reference added. V7: now 24 pages, more
discussion, many refe... | Particles 1 (2018) 10 | 10.3390/particles1010010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some 65 years ago (1951) Wolfgang Pauli noted that the net zero-point energy
density could be set to zero by a carefully fine-tuned cancellation between
bosons and fermions. In the current article I will argue in a slightly
different direction: The zero-point energy density is only one component of the
zero-point str... | [
{
"created": "Mon, 24 Oct 2016 02:01:59 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Nov 2016 05:10:28 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Nov 2016 10:06:40 GMT",
"version": "v3"
},
{
"created": "Wed, 15 Feb 2017 10:04:44 GMT",
"version": "v4"
},
{
"cr... | 2018-05-25 | [
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | Some 65 years ago (1951) Wolfgang Pauli noted that the net zero-point energy density could be set to zero by a carefully fine-tuned cancellation between bosons and fermions. In the current article I will argue in a slightly different direction: The zero-point energy density is only one component of the zero-point stres... |
2201.00938 | James T. Wheeler | James T. Wheeler | Abelian symmetry and the Palatini variation | Modified presentation. 19 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Independent variation of the metric and connection in the Einstein-Hilbert
action, called the Palatini variation, is generally taken to be equivalent to
the usual formulation of general relativity in which only the metric is varied.
However, when an abelian symmetry is allowed for the connection, the Palatini
variati... | [
{
"created": "Tue, 4 Jan 2022 02:11:04 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Feb 2022 03:02:40 GMT",
"version": "v2"
}
] | 2022-02-18 | [
[
"Wheeler",
"James T.",
""
]
] | Independent variation of the metric and connection in the Einstein-Hilbert action, called the Palatini variation, is generally taken to be equivalent to the usual formulation of general relativity in which only the metric is varied. However, when an abelian symmetry is allowed for the connection, the Palatini variation... |
gr-qc/0107018 | Sergio Dain | Sergio Dain | Initial data for stationary space-times near space-like infinity | LaTeX 2e, no figures, 12 pages | Class.Quant.Grav. 18 (2001) 4329-4338 | 10.1088/0264-9381/18/20/312 | null | gr-qc | null | We study Cauchy initial data for asymptotically flat, stationary vacuum
space-times near space-like infinity. The fall-off behavior of the intrinsic
metric and the extrinsic curvature is characterized. We prove that they have an
analytic expansion in powers of a radial coordinate. The coefficients of the
expansion ar... | [
{
"created": "Thu, 5 Jul 2001 11:45:48 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Dain",
"Sergio",
""
]
] | We study Cauchy initial data for asymptotically flat, stationary vacuum space-times near space-like infinity. The fall-off behavior of the intrinsic metric and the extrinsic curvature is characterized. We prove that they have an analytic expansion in powers of a radial coordinate. The coefficients of the expansion are ... |
0809.0469 | Christian Boehmer | Christian G. Boehmer, James Burnett | Dark spinors with torsion in cosmology | 7 pages, 3 figures; reference added, minor improvements | Phys.Rev.D78:104001,2008 | 10.1103/PhysRevD.78.104001 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We solve one of the open problems in Einstein-Cartan theory, namely we find a
natural matter source whose spin angular momentum tensor is compatible with the
cosmological principle. We analyze the resulting evolution equations and find
that an epoch of accelerated expansion is an attractor. The torsion field
quickly ... | [
{
"created": "Tue, 2 Sep 2008 16:44:55 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Sep 2008 10:27:14 GMT",
"version": "v2"
},
{
"created": "Tue, 21 Oct 2008 21:31:34 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Boehmer",
"Christian G.",
""
],
[
"Burnett",
"James",
""
]
] | We solve one of the open problems in Einstein-Cartan theory, namely we find a natural matter source whose spin angular momentum tensor is compatible with the cosmological principle. We analyze the resulting evolution equations and find that an epoch of accelerated expansion is an attractor. The torsion field quickly de... |
1602.03134 | Miriam Cabero | Miriam Cabero, Alex B. Nielsen, Andrew P. Lundgren and Collin D.
Capano | Minimum energy and the end of the inspiral in the post-Newtonian
approximation | null | Phys. Rev. D 95, 064016 (2017) | 10.1103/PhysRevD.95.064016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The early inspiral phase of a compact binary coalescence is well modelled by
the post-Newtonian (PN) approximation to the orbital energy and gravitational
wave flux. The transition from the inspiral phase to the plunge can be defined
by the minimum energy circular orbit (MECO). In the extreme mass-ratio limit,
up to ... | [
{
"created": "Tue, 9 Feb 2016 19:48:01 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Dec 2016 14:02:52 GMT",
"version": "v2"
},
{
"created": "Tue, 25 Apr 2017 14:02:58 GMT",
"version": "v3"
}
] | 2017-04-26 | [
[
"Cabero",
"Miriam",
""
],
[
"Nielsen",
"Alex B.",
""
],
[
"Lundgren",
"Andrew P.",
""
],
[
"Capano",
"Collin D.",
""
]
] | The early inspiral phase of a compact binary coalescence is well modelled by the post-Newtonian (PN) approximation to the orbital energy and gravitational wave flux. The transition from the inspiral phase to the plunge can be defined by the minimum energy circular orbit (MECO). In the extreme mass-ratio limit, up to th... |
gr-qc/9806069 | Paul Anderson | Paul R. Anderson and Courtney D. Mull | Size Gap for Zero Temperature Black Holes in Semiclassical Gravity | 4 pages, ReVTeX, no figures | Phys. Rev. D 59, 044007 (1999) | 10.1103/PhysRevD.59.044007 | null | gr-qc hep-th | null | We show that a gap exists in the allowed sizes of all zero temperature static
spherically symmetric black holes in semiclassical gravity when only
conformally invariant fields are present. The result holds for both charged and
uncharged black holes. By size we mean the proper area of the event horizon.
The range of s... | [
{
"created": "Tue, 16 Jun 1998 21:38:54 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Anderson",
"Paul R.",
""
],
[
"Mull",
"Courtney D.",
""
]
] | We show that a gap exists in the allowed sizes of all zero temperature static spherically symmetric black holes in semiclassical gravity when only conformally invariant fields are present. The result holds for both charged and uncharged black holes. By size we mean the proper area of the event horizon. The range of siz... |
2405.06390 | Milena Skvortsova | Milena Skvortsova | Quasinormal Frequencies of Fields with Various Spin in the Quantum
Oppenheimer-Snyder Model of Black Holes | 9 pages, 7 figures, RevTeX | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A recent development involves an intriguing model of a quantum-corrected
black hole, established through the application of the quantum
Oppenheimer-Snyder model within loop quantum cosmology [Lewandowski et al.,
Phys. Rev. Lett. 130 (2023) 10, 101501]. Employing both time-domain integration
and the WKB approach, we c... | [
{
"created": "Fri, 10 May 2024 10:58:30 GMT",
"version": "v1"
}
] | 2024-05-13 | [
[
"Skvortsova",
"Milena",
""
]
] | A recent development involves an intriguing model of a quantum-corrected black hole, established through the application of the quantum Oppenheimer-Snyder model within loop quantum cosmology [Lewandowski et al., Phys. Rev. Lett. 130 (2023) 10, 101501]. Employing both time-domain integration and the WKB approach, we com... |
1906.03637 | Vardarajan Suneeta | Dhanya S. Menon, Vardarajan Suneeta | Gravitational Perturbations in a cavity: Nonlinearities | 36 pages | Phys. Rev. D 100, 044060 (2019) | 10.1103/PhysRevD.100.044060 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by recent studies of nonlinear perturbations of asymptotically
anti-de Sitter spacetimes, we study gravitational perturbations of $(n+2)$
dimensional Minkowski spacetime with a spherical Dirichlet wall. By considering
the tensor, vector and scalar perturbations on the $n$ sphere, we present
simplified nonho... | [
{
"created": "Sun, 9 Jun 2019 13:31:36 GMT",
"version": "v1"
}
] | 2019-09-04 | [
[
"Menon",
"Dhanya S.",
""
],
[
"Suneeta",
"Vardarajan",
""
]
] | Motivated by recent studies of nonlinear perturbations of asymptotically anti-de Sitter spacetimes, we study gravitational perturbations of $(n+2)$ dimensional Minkowski spacetime with a spherical Dirichlet wall. By considering the tensor, vector and scalar perturbations on the $n$ sphere, we present simplified nonhomo... |
2204.08480 | Michael Florian Wondrak | Jesse Daas, Kolja Kuijpers, Frank Saueressig, Michael F. Wondrak, and
Heino Falcke | Probing Quadratic Gravity with the Event Horizon Telescope | 18 pages, 6 figures | null | 10.1051/0004-6361/202244080 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quadratic gravity constitutes a prototypical example of a perturbatively
renormalizable quantum theory of the gravitational interactions. In this work,
we construct the associated phase space of static, spherically symmetric, and
asymptotically flat spacetimes. It is found that the Schwarzschild geometry is
embedded ... | [
{
"created": "Mon, 18 Apr 2022 17:59:59 GMT",
"version": "v1"
}
] | 2023-05-10 | [
[
"Daas",
"Jesse",
""
],
[
"Kuijpers",
"Kolja",
""
],
[
"Saueressig",
"Frank",
""
],
[
"Wondrak",
"Michael F.",
""
],
[
"Falcke",
"Heino",
""
]
] | Quadratic gravity constitutes a prototypical example of a perturbatively renormalizable quantum theory of the gravitational interactions. In this work, we construct the associated phase space of static, spherically symmetric, and asymptotically flat spacetimes. It is found that the Schwarzschild geometry is embedded in... |
1105.2804 | Edison Montoya | Alejandro Corichi, Edison Montoya | On the Semiclassical Limit of Loop Quantum Cosmology | 17 pages, 5 figures. Typos fixed and discussion expanded. Version to
be published in IJMPD | Int. J. Mod. Phys. D Vol. 21, No. 9 (2012) 1250076 | 10.1142/S0218271812500769 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a k=0 Friedman-Robertson-Walker (FRW) model within loop quantum
cosmology (LQC) and explore the issue of its semiclassical limit. The model is
exactly solvable and allows us to construct analytical (Gaussian)
coherent-state solutions for each point on the space of classical states. We
propose physical cri... | [
{
"created": "Fri, 13 May 2011 18:58:19 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Aug 2012 19:23:42 GMT",
"version": "v2"
}
] | 2012-10-08 | [
[
"Corichi",
"Alejandro",
""
],
[
"Montoya",
"Edison",
""
]
] | We consider a k=0 Friedman-Robertson-Walker (FRW) model within loop quantum cosmology (LQC) and explore the issue of its semiclassical limit. The model is exactly solvable and allows us to construct analytical (Gaussian) coherent-state solutions for each point on the space of classical states. We propose physical crite... |
2008.08550 | Stefan Hollands | Stefan Hollands, Vahid Toomani | On the radiation gauge for spin-1 perturbations in Kerr-Newman spacetime | 33 pages, 1 figure, v2: minor revisions | null | 10.1088/1361-6382/abc36f | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend previous work [arXiv:1908.09095] to the case of Maxwell's equations
with a source. Our work shows how to construct a retarded vector potential for
the Maxwell field on the Kerr-Newman background in a radiation gauge. As in our
previous work, the vector potential has a "reconstructed" term obtained from a
He... | [
{
"created": "Wed, 19 Aug 2020 16:48:53 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Sep 2020 15:53:35 GMT",
"version": "v2"
}
] | 2021-02-03 | [
[
"Hollands",
"Stefan",
""
],
[
"Toomani",
"Vahid",
""
]
] | We extend previous work [arXiv:1908.09095] to the case of Maxwell's equations with a source. Our work shows how to construct a retarded vector potential for the Maxwell field on the Kerr-Newman background in a radiation gauge. As in our previous work, the vector potential has a "reconstructed" term obtained from a Hert... |
1802.02414 | Scientific Information Service CERN | Igor Tkachev | Cosmology and Dark Matter | Ex: 36 pages, contribution to the The 2016 European School of
High-Energy Physics, 15 - 28 Jun 2016, Skeikampen, Norway | CERN Yellow Report CERN-2017-009-SP pp. 259-294 | 10.23730/CYRSP-2017-005.259 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This lecture course covers cosmology from the particle physicist perspective.
Therefore, the emphasis will be on the evidence for the new physics in
cosmological and astrophysical data together with minimal theoretical
frameworks needed to understand and appreciate the evidence. I review the case
for non-baryonic dar... | [
{
"created": "Wed, 7 Feb 2018 13:36:04 GMT",
"version": "v1"
}
] | 2018-02-09 | [
[
"Tkachev",
"Igor",
""
]
] | This lecture course covers cosmology from the particle physicist perspective. Therefore, the emphasis will be on the evidence for the new physics in cosmological and astrophysical data together with minimal theoretical frameworks needed to understand and appreciate the evidence. I review the case for non-baryonic dark ... |
2401.07112 | Mehrab Momennia | Gerardo Morales-Herrera, Pablo Ortega-Ruiz, Mehrab Momennia, Alfredo
Herrera-Aguilar | Mass, charge, and distance to Reissner-Nordstr\"{o}m black hole in terms
of directly measurable quantities | 10 pages with 3 captioned figures. Comments are welcome; V2:
Published version | Eur. Phys. J. C 84 (2024) 525 | 10.1140/epjc/s10052-024-12880-w | null | gr-qc astro-ph.CO astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | In this paper, we employ a general relativistic formalism and develop new
theoretical tools that allow us to analytically express the mass and electric
charge of the Reissner-Nordstr\"{o}m black hole as well as its distance to a
distant observer in terms of few directly observable quantities, such as the
total freque... | [
{
"created": "Sat, 13 Jan 2024 16:21:52 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Jul 2024 00:43:50 GMT",
"version": "v2"
}
] | 2024-07-12 | [
[
"Morales-Herrera",
"Gerardo",
""
],
[
"Ortega-Ruiz",
"Pablo",
""
],
[
"Momennia",
"Mehrab",
""
],
[
"Herrera-Aguilar",
"Alfredo",
""
]
] | In this paper, we employ a general relativistic formalism and develop new theoretical tools that allow us to analytically express the mass and electric charge of the Reissner-Nordstr\"{o}m black hole as well as its distance to a distant observer in terms of few directly observable quantities, such as the total frequenc... |
1711.04221 | Yoelsy Leyva | Yoelsy Leyva | Phase space analysis of a FRW cosmology in the Maxwell$-$Cattaneo
approach | 7 pages, 1 figure | null | 10.1142/S0218271819500019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we present a phase space analysis of a spatially flat Friedmann
$-$Robertson$-$Walker (FRW) model in which the dark matter fluid is modeled as
an imperfect fluid having bulk viscosity. The bulk viscosity is governed by the
Maxwell$-$Cattaneo approach. The rest of the components of the model: radiation
a... | [
{
"created": "Sun, 12 Nov 2017 02:27:18 GMT",
"version": "v1"
}
] | 2019-01-23 | [
[
"Leyva",
"Yoelsy",
""
]
] | In this work, we present a phase space analysis of a spatially flat Friedmann $-$Robertson$-$Walker (FRW) model in which the dark matter fluid is modeled as an imperfect fluid having bulk viscosity. The bulk viscosity is governed by the Maxwell$-$Cattaneo approach. The rest of the components of the model: radiation and... |
1304.3054 | Ahmad Sheykhi | Ahmad Sheykhi | Friedmann equations from emergence of cosmic space | 6 pages. The text was revised to remove text overlap with other paper | Phys. Rev. D 87, 061501(R) (2013) | 10.1103/PhysRevD.87.061501 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/3.0/ | Padmanabhan [arXiv:1206.4916] argues that the cosmic acceleration can be
understood from the perspective that spacetime dynamics is an emergence
phenomena. By calculating the difference between the surface degrees of freedom
and the bulk degrees of freedom in a region of space, he also arrives at the
Friedmann equati... | [
{
"created": "Wed, 10 Apr 2013 19:01:19 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Apr 2013 19:14:25 GMT",
"version": "v2"
}
] | 2013-04-19 | [
[
"Sheykhi",
"Ahmad",
""
]
] | Padmanabhan [arXiv:1206.4916] argues that the cosmic acceleration can be understood from the perspective that spacetime dynamics is an emergence phenomena. By calculating the difference between the surface degrees of freedom and the bulk degrees of freedom in a region of space, he also arrives at the Friedmann equation... |
gr-qc/9803049 | Claus Kiefer | Claus Kiefer | Towards a Full Quantum Theory of Black Holes | 32 pages, needs macro lamuphys.sty, additional comments and
references added, to appear in ``Black Holes: Theory and Observation''
(Springer 1998) | null | 10.1007/978-3-540-49535-2_20 | Freiburg THEP-97/24 | gr-qc astro-ph hep-th | null | This review gives an introduction to various attempts to understand the
quantum nature of black holes. The first part focuses on thermodynamics of
black holes, Hawking radiation, and the interpretation of entropy. The second
part is devoted to the detailed treatment of black holes within canonical
quantum gravity. Th... | [
{
"created": "Fri, 13 Mar 1998 15:13:33 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Apr 1998 13:28:00 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Kiefer",
"Claus",
""
]
] | This review gives an introduction to various attempts to understand the quantum nature of black holes. The first part focuses on thermodynamics of black holes, Hawking radiation, and the interpretation of entropy. The second part is devoted to the detailed treatment of black holes within canonical quantum gravity. The ... |
2302.02423 | Lawrence P. Horwitz | L.P. Horwitz | $N\geq 2$ Particles in the Framework of TeVeS | 5 pages, no figures | null | 10.1088/1742-6596/2482/1/012001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | About 40 years ago, since no viable candidate for "dark matter" was
discovered, M. Milgrom and J. Bekenstein introduced a non-covariant modfication
of gravitational theory ((MOND) to account for the anomalpous rotation curves
of galaxies. Bekenstein and Sanders then developed a relativistically covariant
form of the ... | [
{
"created": "Sun, 5 Feb 2023 16:35:12 GMT",
"version": "v1"
}
] | 2023-05-31 | [
[
"Horwitz",
"L. P.",
""
]
] | About 40 years ago, since no viable candidate for "dark matter" was discovered, M. Milgrom and J. Bekenstein introduced a non-covariant modfication of gravitational theory ((MOND) to account for the anomalpous rotation curves of galaxies. Bekenstein and Sanders then developed a relativistically covariant form of the th... |
2006.00023 | Alberto S\'anchez | Alberto S\'anchez | Geometrothermodynamics of black holes with a nonlinear source | 14 pages, 30 figures | null | 10.1007/s10714-021-02843-x | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study thermodynamics and geometrothermodynamics of a particular black hole
configuration with a nonlinear source. We use the mass as fundamental equation,
from which it follows that the curvature radius must be considered as a
thermodynamic variable, leading to an extended equilibrium space. Using the
formalism of... | [
{
"created": "Fri, 29 May 2020 18:21:27 GMT",
"version": "v1"
}
] | 2021-08-11 | [
[
"Sánchez",
"Alberto",
""
]
] | We study thermodynamics and geometrothermodynamics of a particular black hole configuration with a nonlinear source. We use the mass as fundamental equation, from which it follows that the curvature radius must be considered as a thermodynamic variable, leading to an extended equilibrium space. Using the formalism of g... |
1208.4729 | Stefano Finazzi | Stefano Finazzi | Analogue gravitational phenomena in Bose-Einstein condensates | 180 pages, 53 figures, 4 gif animations. PhD Thesis, International
School for Advanced Studies (SISSA), Trieste. Supervisor: prof. Stefano
Liberati. Date of PhD defense: 5 July 2011 | null | null | null | gr-qc cond-mat.quant-gas | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Analogue gravity is based on the simple observation that perturbations
propagating in several physical systems can be described by a quantum field
theory in a curved spacetime. While phenomena like Hawking radiation are hardly
detectable in astrophysical black holes, these effects may be experimentally
tested in anal... | [
{
"created": "Thu, 23 Aug 2012 11:49:55 GMT",
"version": "v1"
}
] | 2015-03-13 | [
[
"Finazzi",
"Stefano",
""
]
] | Analogue gravity is based on the simple observation that perturbations propagating in several physical systems can be described by a quantum field theory in a curved spacetime. While phenomena like Hawking radiation are hardly detectable in astrophysical black holes, these effects may be experimentally tested in analog... |
gr-qc/0406011 | Joan Josep Ferrando | Bartolom\'e Coll and Joan Josep Ferrando | Comment to the reply to "On the thermodynamics of inhomogeneous perfect
fluid mixtures" | 2 pages | null | null | null | gr-qc | null | In spite of a recent reply by Quevedo and Z\'arate (gr-qc/0403096), their
assertion that their thermodynamic scheme for a perfect fluid binary mixture is
incompatible with Szekeres and Stephani families of universes, except those of
FRW ones, remains wrong.
| [
{
"created": "Thu, 3 Jun 2004 09:03:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Coll",
"Bartolomé",
""
],
[
"Ferrando",
"Joan Josep",
""
]
] | In spite of a recent reply by Quevedo and Z\'arate (gr-qc/0403096), their assertion that their thermodynamic scheme for a perfect fluid binary mixture is incompatible with Szekeres and Stephani families of universes, except those of FRW ones, remains wrong. |
gr-qc/0410066 | Jiro Soda | Jiro Soda, Sugumi Kanno | Braneworld Cosmology | Plenary talk at Gamow Memorial International Conference, Odessa,
Ukraine, August 8-14, 2004; 12 pages | null | null | KUNS-1937 | gr-qc | null | We present a general formalism for studying an inflationary scenario in the
two-brane system. We explain the gradient expansion method and obtain the
4-dimensional effective action. Based on this effective action, we give a basic
equations for the background homogeneous universe and the cosmological
perturbations. As... | [
{
"created": "Fri, 15 Oct 2004 09:28:06 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Soda",
"Jiro",
""
],
[
"Kanno",
"Sugumi",
""
]
] | We present a general formalism for studying an inflationary scenario in the two-brane system. We explain the gradient expansion method and obtain the 4-dimensional effective action. Based on this effective action, we give a basic equations for the background homogeneous universe and the cosmological perturbations. As a... |
1606.06766 | Mauricio Bellini | Marcos R. A. Arcod\'ia, Luis Santiago Ridao, Mauricio Bellini (IFIMAR
- CONICET & UNMdP) | Absorption of charged particles in a Reissner-Nordstr\"om Black-Hole:
entropy evolution from Relativistic Quantum Geometry | Version accepted in Astrophys. Space Sci | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using Relativistic Quantum Geometry we show that the entropy can decrease in
very small BHs, under certain circumstances, but always increases in very
massive Black-Holes.
| [
{
"created": "Tue, 21 Jun 2016 20:51:03 GMT",
"version": "v1"
},
{
"created": "Sun, 31 Jul 2016 03:29:10 GMT",
"version": "v2"
}
] | 2016-08-02 | [
[
"Arcodía",
"Marcos R. A.",
"",
"IFIMAR\n - CONICET & UNMdP"
],
[
"Ridao",
"Luis Santiago",
"",
"IFIMAR\n - CONICET & UNMdP"
],
[
"Bellini",
"Mauricio",
"",
"IFIMAR\n - CONICET & UNMdP"
]
] | Using Relativistic Quantum Geometry we show that the entropy can decrease in very small BHs, under certain circumstances, but always increases in very massive Black-Holes. |
gr-qc/9509030 | null | V. Bashkov, A. Tchernomorov | Solutions of Maxwell Equations for Hollow curved Wave Conductor | 6 pages | null | null | 95-09 | gr-qc | null | In the present paper the idea is proposed to solve Maxwell equations for a
curved hollow wave conductor by means of effective Riemannian space, in which
the lines of motion of fotons are isotropic geodesies for a 4-dimensional
space-time. The algorithm of constructing such a metric and curvature tensor
components are... | [
{
"created": "Mon, 18 Sep 1995 17:37:14 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bashkov",
"V.",
""
],
[
"Tchernomorov",
"A.",
""
]
] | In the present paper the idea is proposed to solve Maxwell equations for a curved hollow wave conductor by means of effective Riemannian space, in which the lines of motion of fotons are isotropic geodesies for a 4-dimensional space-time. The algorithm of constructing such a metric and curvature tensor components are w... |
1808.00393 | Titus K Mathew | Mahith M., Krishna P. B. and Titus K. Mathew | Expansion Law From First Law of Thermodynamics | 17 pages | null | 10.1088/1475-7516/2018/12/042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Padmanabhan in his paper [arxiv: 1206.4916] put forth an intriguing idea
arguing that the accelerated expansion of the universse can be viewed as the
emergence of cosmic space as cosmic time progresses, with the expansion
triggered due to the difference in the degrees of freedom on a holographic
surface and the one i... | [
{
"created": "Wed, 1 Aug 2018 16:00:29 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Aug 2018 11:39:44 GMT",
"version": "v2"
},
{
"created": "Fri, 2 Nov 2018 11:02:55 GMT",
"version": "v3"
}
] | 2018-12-26 | [
[
"M.",
"Mahith",
""
],
[
"B.",
"Krishna P.",
""
],
[
"Mathew",
"Titus K.",
""
]
] | Padmanabhan in his paper [arxiv: 1206.4916] put forth an intriguing idea arguing that the accelerated expansion of the universse can be viewed as the emergence of cosmic space as cosmic time progresses, with the expansion triggered due to the difference in the degrees of freedom on a holographic surface and the one in ... |
1711.07015 | Yerko V\'asquez | Felipe Herrera and Yerko V\'asquez | AdS and Lifshitz black hole solutions in conformal gravity sourced with
a scalar field | null | null | 10.1016/j.physletb.2018.05.051 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we obtain exact asymptotically anti-de Sitter black hole
solutions and asymptotically Lifshitz black hole solutions with dynamical
exponents $z=0$ and $z=4$ of four-dimensional conformal gravity coupled with a
self-interacting conformally invariant scalar field. Then, we compute their
thermodynamical qu... | [
{
"created": "Sun, 19 Nov 2017 13:02:05 GMT",
"version": "v1"
},
{
"created": "Wed, 16 May 2018 21:07:14 GMT",
"version": "v2"
}
] | 2018-05-23 | [
[
"Herrera",
"Felipe",
""
],
[
"Vásquez",
"Yerko",
""
]
] | In this paper we obtain exact asymptotically anti-de Sitter black hole solutions and asymptotically Lifshitz black hole solutions with dynamical exponents $z=0$ and $z=4$ of four-dimensional conformal gravity coupled with a self-interacting conformally invariant scalar field. Then, we compute their thermodynamical quan... |
gr-qc/0111107 | Aharon Davidson | Aharon Davidson, David Karasik, Yoav Lederer | Cold Dark Matter from Dark Energy | 4 pages, 4 eps figures, Revtex | null | null | null | gr-qc astro-ph | null | Dark energy/matter unification is first demonstrated within the framework of
a simplified model.
Geodetic evolution of a cosmological constant dominated bubble Universe, free
of genuine matter, is translated into a specific FRW cosmology whose
effectively induced dark component highly resembles the cold dark matter... | [
{
"created": "Thu, 29 Nov 2001 21:26:14 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Davidson",
"Aharon",
""
],
[
"Karasik",
"David",
""
],
[
"Lederer",
"Yoav",
""
]
] | Dark energy/matter unification is first demonstrated within the framework of a simplified model. Geodetic evolution of a cosmological constant dominated bubble Universe, free of genuine matter, is translated into a specific FRW cosmology whose effectively induced dark component highly resembles the cold dark matter ans... |
1609.02801 | Shibesh Kumar Jas Pacif | S. K. J. Pacif, R. Myrzakulov, S. Myrzakul | Reconstruction of cosmic history from a simple parametrization of H | 24 pages, 5 figures | International Journal of Geometric Methods in Modern Physics, Vol.
14, No. 7 (2017) 1750111 (27 pages) | 10.1142/S0219887817501110 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we propose a simple parametrization of the Hubble parameter H
in order to explain the late time cosmic acceleration. We show that our
proposal covers many models obtained in different schemes of parametrization
under one umbrella. We demonstrate that a simple modification in the functional
form of Hubb... | [
{
"created": "Thu, 8 Sep 2016 05:29:17 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Sep 2016 07:22:30 GMT",
"version": "v2"
}
] | 2022-07-20 | [
[
"Pacif",
"S. K. J.",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Myrzakul",
"S.",
""
]
] | In this paper, we propose a simple parametrization of the Hubble parameter H in order to explain the late time cosmic acceleration. We show that our proposal covers many models obtained in different schemes of parametrization under one umbrella. We demonstrate that a simple modification in the functional form of Hubble... |
1101.4012 | Nikodem Poplawski | Nikodem J. Poplawski | Matter-antimatter asymmetry and dark matter from torsion | 5 pages; published version | Phys.Rev.D83:084033,2011 | 10.1103/PhysRevD.83.084033 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a simple scenario which explains the observed matter-antimatter
imbalance and the origin of dark matter in the Universe. We use the
Einstein-Cartan-Sciama-Kibble theory of gravity which naturally extends general
relativity to include the intrinsic spin of matter. Spacetime torsion produced
by spin generate... | [
{
"created": "Thu, 20 Jan 2011 20:52:14 GMT",
"version": "v1"
},
{
"created": "Thu, 26 May 2011 16:49:52 GMT",
"version": "v2"
}
] | 2011-06-30 | [
[
"Poplawski",
"Nikodem J.",
""
]
] | We propose a simple scenario which explains the observed matter-antimatter imbalance and the origin of dark matter in the Universe. We use the Einstein-Cartan-Sciama-Kibble theory of gravity which naturally extends general relativity to include the intrinsic spin of matter. Spacetime torsion produced by spin generates,... |
0901.1470 | Katarzyna Ostasiewicz | A. Radosz, A.T. Augousti, K. Ostasiewicz | The Doppler shift in a Schwarzschild spacetime | Accepted for publishing in Physics Letters A | Phys.Lett.A373:801-803,2009 | 10.1016/j.physleta.2008.12.059 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate that in the case of Schwarzschild spacetime the Doppler shift
is partially factorized into terms representing relativistic, kinematical and
the gravitational contributions. The condition for the complete factorization
is derived. Application of these results to the simplest cases and possible
implement... | [
{
"created": "Sun, 11 Jan 2009 21:29:20 GMT",
"version": "v1"
}
] | 2009-03-09 | [
[
"Radosz",
"A.",
""
],
[
"Augousti",
"A. T.",
""
],
[
"Ostasiewicz",
"K.",
""
]
] | We demonstrate that in the case of Schwarzschild spacetime the Doppler shift is partially factorized into terms representing relativistic, kinematical and the gravitational contributions. The condition for the complete factorization is derived. Application of these results to the simplest cases and possible implementat... |
gr-qc/0606113 | Roger Bieli | Roger Bieli | Coupled quintessence and curvature-assisted acceleration | 17 pages, no figures. v2: typos corrected | Class.Quant.Grav. 23 (2006) 5983-5995 | 10.1088/0264-9381/23/20/018 | AEI-2006-052 | gr-qc astro-ph | null | Spatially homogeneous models with a scalar field non-minimally coupled to the
space-time curvature or to the ordinary matter content are analysed with
respect to late-time asymptotic behaviour, in particular to accelerated
expansion and isotropization. It is found that a direct coupling to the
curvature leads to asym... | [
{
"created": "Mon, 26 Jun 2006 13:41:32 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Aug 2006 14:44:00 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Bieli",
"Roger",
""
]
] | Spatially homogeneous models with a scalar field non-minimally coupled to the space-time curvature or to the ordinary matter content are analysed with respect to late-time asymptotic behaviour, in particular to accelerated expansion and isotropization. It is found that a direct coupling to the curvature leads to asympt... |
0709.0536 | Richard Woodard | E. O. Kahya and R. P. Woodard (University of Florida) | Quantum Gravity Corrections to the One Loop Scalar Self-Mass during
Inflation | 47 pages, 3 figures, 20 tables, uses LaTeX 2 epsilon, version 2
revised for publication in Physical Review D | Phys.Rev.D76:124005,2007 | 10.1103/PhysRevD.76.124005 | UFIFT-QG-07-04 | gr-qc astro-ph hep-th | null | We compute the one loop corrections from quantum gravity to the
self-mass-squared of a massless, minimally coupled scalar on a locally de
Sitter background. The calculation was done using dimensional regularization
and renormalized by subtracting fourth order BPHZ counterterms. Our result
should determine whether qua... | [
{
"created": "Tue, 4 Sep 2007 20:24:33 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Nov 2007 16:47:29 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Kahya",
"E. O.",
"",
"University of Florida"
],
[
"Woodard",
"R. P.",
"",
"University of Florida"
]
] | We compute the one loop corrections from quantum gravity to the self-mass-squared of a massless, minimally coupled scalar on a locally de Sitter background. The calculation was done using dimensional regularization and renormalized by subtracting fourth order BPHZ counterterms. Our result should determine whether quant... |
1908.05741 | Jackson Levi Said | Viktor Gakis, Martin Kr\v{s}\v{s}\'ak, Jackson Levi Said, Emmanuel N.
Saridakis | Conformal Gravity and Transformations in the Symmetric Teleparallel
Framework | 14 pages | Phys. Rev. D 101, 064024 (2020) | 10.1103/PhysRevD.101.064024 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Conformal symmetries appear in many parts of physics and play a unique role
in exploring the Universe. In this work, we consider the possibility of
constructing conformal theories of gravity in the Symmetric Teleparallel
Gravity framework, where gravitation is expressed through non-metricity rather
than curvature or ... | [
{
"created": "Wed, 14 Aug 2019 06:55:53 GMT",
"version": "v1"
}
] | 2020-03-18 | [
[
"Gakis",
"Viktor",
""
],
[
"Krššák",
"Martin",
""
],
[
"Said",
"Jackson Levi",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | Conformal symmetries appear in many parts of physics and play a unique role in exploring the Universe. In this work, we consider the possibility of constructing conformal theories of gravity in the Symmetric Teleparallel Gravity framework, where gravitation is expressed through non-metricity rather than curvature or to... |
1808.06504 | Pardyumn Kumar Sahoo | P.K. Sahoo, I. Radinschi, K. L. Mahanta | Energy-Momentum Distribution in General Relativity for a Phantom Black
Hole Metric | To appear in Indian Journal of Physics | Indian Journal of Physics 94 (12) (2020) 2065-2072 | 10.1007/s12648-019-01651-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the M{\o}ller and Landau-Lifshitz energy-momentum definitions in
General Relativity (GR) to evaluate the energy-momentum distribution of the
phantom black hole space-time. The phantom black hole model was applied to the
supermassive black hole at the Galactic Centre. We obtain that in both
pseudotensorial pres... | [
{
"created": "Fri, 17 Aug 2018 14:10:50 GMT",
"version": "v1"
},
{
"created": "Sat, 4 May 2019 09:12:42 GMT",
"version": "v2"
},
{
"created": "Thu, 16 May 2019 14:14:06 GMT",
"version": "v3"
},
{
"created": "Mon, 16 Sep 2019 14:32:06 GMT",
"version": "v4"
}
] | 2020-11-24 | [
[
"Sahoo",
"P. K.",
""
],
[
"Radinschi",
"I.",
""
],
[
"Mahanta",
"K. L.",
""
]
] | We use the M{\o}ller and Landau-Lifshitz energy-momentum definitions in General Relativity (GR) to evaluate the energy-momentum distribution of the phantom black hole space-time. The phantom black hole model was applied to the supermassive black hole at the Galactic Centre. We obtain that in both pseudotensorial prescr... |
2208.07757 | Sayantani Datta | Sayantani Datta, M. Saleem, K. G. Arun, B. S. Sathyaprakash | Multiparameter tests of general relativity using principal component
analysis with next-generation gravitational wave detectors | null | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Principal Component Analysis (PCA) is an efficient tool to optimize the
multiparameter tests of general relativity (GR) where one tests for
simultaneous deviations in multiple post-Newtonian (PN) phasing coefficients by
introducing fractional deformation parameters. We use PCA to construct the
`best-measured' linear ... | [
{
"created": "Tue, 16 Aug 2022 14:04:11 GMT",
"version": "v1"
}
] | 2022-08-17 | [
[
"Datta",
"Sayantani",
""
],
[
"Saleem",
"M.",
""
],
[
"Arun",
"K. G.",
""
],
[
"Sathyaprakash",
"B. S.",
""
]
] | Principal Component Analysis (PCA) is an efficient tool to optimize the multiparameter tests of general relativity (GR) where one tests for simultaneous deviations in multiple post-Newtonian (PN) phasing coefficients by introducing fractional deformation parameters. We use PCA to construct the `best-measured' linear co... |
2303.16107 | Massimiliano Rinaldi | Massimiliano Rinaldi, Chiara Cecchini, Anish Ghoshal, and Debangshu
Mukherjee | Scale-invariant inflation | Proceedings of the Workshop "Avenues of Quantum Field Theory in
Curved Spacetime" (AQFTCS 2022), University of Genova, Italy | null | 10.1088/1742-6596/2531/1/012012 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine a scalar-tensor model of gravity that is globally scale-invariant.
When adapted to a spatially flat Robertson-Walker metric, the equations of
motion describe a dynamical system that flows from an unstable de Sitter space
to a stable one. We show that during this transition inflation can occur.
Moreover, at... | [
{
"created": "Tue, 28 Mar 2023 16:22:57 GMT",
"version": "v1"
}
] | 2023-06-27 | [
[
"Rinaldi",
"Massimiliano",
""
],
[
"Cecchini",
"Chiara",
""
],
[
"Ghoshal",
"Anish",
""
],
[
"Mukherjee",
"Debangshu",
""
]
] | We examine a scalar-tensor model of gravity that is globally scale-invariant. When adapted to a spatially flat Robertson-Walker metric, the equations of motion describe a dynamical system that flows from an unstable de Sitter space to a stable one. We show that during this transition inflation can occur. Moreover, at t... |
1811.06387 | Florian Kuhnel | Florian Kuhnel, Andrew Matas, Glenn D. Starkman, Katherine Freese | Waves from the Centre: Probing PBH and other Macroscopic Dark Matter
with LISA | v2: Update to match published version. arXiv admin note: text overlap
with arXiv:1705.10361 | Eur.Phys.J.C 80 (2020) 7, 627 | 10.1140/epjc/s10052-020-8183-4 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A significant fraction of cosmological dark matter can be formed by very
dense macroscopic objects, for example primordial black holes. Gravitational
waves offer a promising way to probe these kinds of dark-matter candidates, in
a parameter space region that is relatively untested by electromagnetic
observations. In ... | [
{
"created": "Wed, 14 Nov 2018 18:35:25 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Oct 2020 12:37:34 GMT",
"version": "v2"
}
] | 2020-10-23 | [
[
"Kuhnel",
"Florian",
""
],
[
"Matas",
"Andrew",
""
],
[
"Starkman",
"Glenn D.",
""
],
[
"Freese",
"Katherine",
""
]
] | A significant fraction of cosmological dark matter can be formed by very dense macroscopic objects, for example primordial black holes. Gravitational waves offer a promising way to probe these kinds of dark-matter candidates, in a parameter space region that is relatively untested by electromagnetic observations. In th... |
gr-qc/0008056 | Zhongchao Wu | Zhong Chao Wu | The Topological Origin of Black Hole Entropy | 7 pages, received honorable mention from GRF2000 | Int.J.Mod.Phys. D9 (2000) 711-716 | null | Beijing preprint 00-101 | gr-qc astro-ph hep-th | null | In gravitational thermodynamics, the origin of a black hole's entropy is the
topology of its instanton or constrained instanton. We prove that the entropy
of an arbitrary nonrotating black hole is one quarter the sum of the products
of the Euler characteristics of its horizons with their respective areas. The
Gauss-B... | [
{
"created": "Tue, 22 Aug 2000 22:56:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wu",
"Zhong Chao",
""
]
] | In gravitational thermodynamics, the origin of a black hole's entropy is the topology of its instanton or constrained instanton. We prove that the entropy of an arbitrary nonrotating black hole is one quarter the sum of the products of the Euler characteristics of its horizons with their respective areas. The Gauss-Bon... |
2307.13280 | Salvatore Capozziello | Salvatore Capozziello, Vittorio De Falco, Carmen Ferrara | The role of the boundary term in $f(Q,B)$ symmetric teleparallel gravity | 8 pages, 1 figure, accepted for publication in EPJC | Eur. Phys. J. C 83, 915 (2023) | 10.1140/epjc/s10052-023-12072-y | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of metric-affine gravity, we consider the role of the
boundary term in Symmetric Teleparallel Gravity assuming $f(Q,B)$ models where
$f$ is a smooth function of the non-metricity scalar $Q$ and the related
boundary term $B$. Starting from a variational approach, we derive the field
equations and comp... | [
{
"created": "Tue, 25 Jul 2023 06:34:43 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Sep 2023 06:57:03 GMT",
"version": "v2"
}
] | 2023-10-17 | [
[
"Capozziello",
"Salvatore",
""
],
[
"De Falco",
"Vittorio",
""
],
[
"Ferrara",
"Carmen",
""
]
] | In the framework of metric-affine gravity, we consider the role of the boundary term in Symmetric Teleparallel Gravity assuming $f(Q,B)$ models where $f$ is a smooth function of the non-metricity scalar $Q$ and the related boundary term $B$. Starting from a variational approach, we derive the field equations and compar... |
2309.14874 | Miguel Manzano | Miguel Manzano and Marc Mars | Abstract Formulation of the Spacetime Matching Problem and Null Thin
Shells | 35 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The formalism of hypersurface data is a framework to study hypersurfaces of
any causal character abstractly (i.e. without the need of viewing them as
embedded in an ambient space). In this paper we exploit this formalism to study
the general problem of matching two spacetimes in a fully abstract manner, as
this turns... | [
{
"created": "Tue, 26 Sep 2023 12:14:54 GMT",
"version": "v1"
}
] | 2023-09-27 | [
[
"Manzano",
"Miguel",
""
],
[
"Mars",
"Marc",
""
]
] | The formalism of hypersurface data is a framework to study hypersurfaces of any causal character abstractly (i.e. without the need of viewing them as embedded in an ambient space). In this paper we exploit this formalism to study the general problem of matching two spacetimes in a fully abstract manner, as this turns o... |
1105.2125 | Yuichiro Sekiguchi | Yuichiro Sekiguchi, Kenta Kiuchi, Koutarou Kyutoku, and Masaru Shibata | Gravitational waves and neutrino emission from the merger of binary
neutron stars | 4 pages, 4 figures (Fig.2 is in low resolution), Accepted for
publication in PRL | Phys.Rev.Lett.107:051102,2011 | 10.1103/PhysRevLett.107.051102 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Numerical simulations for the merger of binary neutron stars are performed in
full general relativity incorporating a finite-temperature (Shen's) equation of
state (EOS) and neutrino cooling for the first time. It is found that for this
stiff EOS, a hypermassive neutron star (HMNS) with a long lifetime ($\gg 10$
ms) ... | [
{
"created": "Wed, 11 May 2011 08:53:17 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Jun 2011 03:23:51 GMT",
"version": "v2"
}
] | 2011-08-22 | [
[
"Sekiguchi",
"Yuichiro",
""
],
[
"Kiuchi",
"Kenta",
""
],
[
"Kyutoku",
"Koutarou",
""
],
[
"Shibata",
"Masaru",
""
]
] | Numerical simulations for the merger of binary neutron stars are performed in full general relativity incorporating a finite-temperature (Shen's) equation of state (EOS) and neutrino cooling for the first time. It is found that for this stiff EOS, a hypermassive neutron star (HMNS) with a long lifetime ($\gg 10$ ms) is... |
2401.00686 | Dinesh Chandra Maurya | Dinesh Chandra Maurya, Ratbay Myrzakulov | Transit cosmological models in Myrzakulov F(R,T) gravity theory | 22 pages, 11 figures | Eur. Phys. J. C 84, 534 (2024) | 10.1140/epjc/s10052-024-12904-5 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | In the present paper, we investigate some exact cosmological models in
Myrzakulov $F(R,T)$ gravity theory. We have considered the arbitrary function
$F(R, T)=R+\lambda T$ where $\lambda$ is an arbitrary constant, $R, T$ are
respectively, the Ricci-scalar curvature and the torsion. We have solved the
field equations i... | [
{
"created": "Mon, 1 Jan 2024 07:20:42 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Feb 2024 06:29:57 GMT",
"version": "v2"
}
] | 2024-08-14 | [
[
"Maurya",
"Dinesh Chandra",
""
],
[
"Myrzakulov",
"Ratbay",
""
]
] | In the present paper, we investigate some exact cosmological models in Myrzakulov $F(R,T)$ gravity theory. We have considered the arbitrary function $F(R, T)=R+\lambda T$ where $\lambda$ is an arbitrary constant, $R, T$ are respectively, the Ricci-scalar curvature and the torsion. We have solved the field equations in ... |
1609.03152 | Jing-Bo Wang | Jingbo Wang | Holographic equipartition from first order action | 5 pages, no figures | null | 10.1007/s10714-017-2320-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we get the holographic equipartition form the first order
formulism, that is, the connection and its conjugate momentum are considered to
be the canonical variables. The final results have similar structure as those
from the metric formulism.
| [
{
"created": "Sun, 11 Sep 2016 11:26:57 GMT",
"version": "v1"
}
] | 2017-11-29 | [
[
"Wang",
"Jingbo",
""
]
] | In this paper, we get the holographic equipartition form the first order formulism, that is, the connection and its conjugate momentum are considered to be the canonical variables. The final results have similar structure as those from the metric formulism. |
1302.4866 | Orlando Luongo | Orlando Luongo and Hernando Quevedo | Cosmological implications of Geometrothermodynamics | Proceeding MG XIII | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the formalism of Geometrothermodynamics to derive a series of
fundamental equations for thermodynamic systems. It is shown that all these
fundamental equations can be used in the context of relativistic cosmology to
derive diverse scenarios which include the standard cosmological model, a
unified model for dar... | [
{
"created": "Wed, 20 Feb 2013 10:44:27 GMT",
"version": "v1"
}
] | 2013-02-21 | [
[
"Luongo",
"Orlando",
""
],
[
"Quevedo",
"Hernando",
""
]
] | We use the formalism of Geometrothermodynamics to derive a series of fundamental equations for thermodynamic systems. It is shown that all these fundamental equations can be used in the context of relativistic cosmology to derive diverse scenarios which include the standard cosmological model, a unified model for dark ... |
1410.2993 | Rui Chen | Ge-Rui Chen and Yong-Chang Huang | Spectroscopy of a weakly isolated horizon | arXiv admin note: text overlap with arXiv:1106.2292 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spectroscopy of a weakly isolated horizon (WIH) has been investigated. We
obtain an equally spaced entropy spectrum with its quantum equal to the one
given by Bekenstein [5]. We demonstrate that the quantization of entropy and
area is a generic property of horizon, and the results exit in a wide class of
spacetim... | [
{
"created": "Sat, 11 Oct 2014 12:51:39 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Feb 2015 08:14:38 GMT",
"version": "v2"
},
{
"created": "Thu, 12 Feb 2015 07:56:43 GMT",
"version": "v3"
}
] | 2015-02-13 | [
[
"Chen",
"Ge-Rui",
""
],
[
"Huang",
"Yong-Chang",
""
]
] | The spectroscopy of a weakly isolated horizon (WIH) has been investigated. We obtain an equally spaced entropy spectrum with its quantum equal to the one given by Bekenstein [5]. We demonstrate that the quantization of entropy and area is a generic property of horizon, and the results exit in a wide class of spacetimes... |
1702.08445 | Merab Gogberashvili Prof | Merab Gogberashvili | Electroweak Phase Transitions in Einstein's Static Universe | The published version | Adv. High Energy Phys., vol. 2018 (2018) Article ID 4653202, 5
pages | 10.1155/2018/4653202 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We suggest using Einstein's static universe metric for the metastable state
after reheating, instead of the Friedman-Robertson-Walker spacetime. In this
case strong static gravitational potential leads to the effective reduction of
the Higgs vacuum expectation value, which is found to be compatible with the
Standard ... | [
{
"created": "Sun, 26 Feb 2017 13:29:11 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Apr 2018 04:43:01 GMT",
"version": "v2"
}
] | 2018-04-23 | [
[
"Gogberashvili",
"Merab",
""
]
] | We suggest using Einstein's static universe metric for the metastable state after reheating, instead of the Friedman-Robertson-Walker spacetime. In this case strong static gravitational potential leads to the effective reduction of the Higgs vacuum expectation value, which is found to be compatible with the Standard Mo... |
1510.04429 | Javad Taghizadeh Firouzjaee | Reza Javadinezhad, Javad T. Firouzjaee and Reza Mansouri | Relativistic virial relation for cosmological structures | 8 pages | Phys. Rev. D 93, 023007 (2016) | 10.1103/PhysRevD.93.023007 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Starting with the relativistic Boltzmann equation for a system of particles
defined by a distribution function, we have derived the virial relation for a
spherical structure within an expanding background in the context of general
relativity. This generalized form of the virial relation is then applied to the
static ... | [
{
"created": "Thu, 15 Oct 2015 07:34:23 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Feb 2016 15:06:05 GMT",
"version": "v2"
}
] | 2016-02-03 | [
[
"Javadinezhad",
"Reza",
""
],
[
"Firouzjaee",
"Javad T.",
""
],
[
"Mansouri",
"Reza",
""
]
] | Starting with the relativistic Boltzmann equation for a system of particles defined by a distribution function, we have derived the virial relation for a spherical structure within an expanding background in the context of general relativity. This generalized form of the virial relation is then applied to the static ca... |
1607.03873 | Dan Vollick | Christopher Garner and Dan N. Vollick | Lorentz gauge quantization in synchronous coordinates | 5 pages | Phys. Rev. D 93, 064010 (2016) | 10.1103/PhysRevD.93.064010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown that the Gupta-Bleuler method of quantization can be used
to impose the Lorentz gauge condition in static space-times but not in
cosmological space-times. This implies that the Gupta-Bleuler approach fails in
general in non-static space-times. More recently, however, the Dirac method of
quantizing c... | [
{
"created": "Wed, 13 Jul 2016 19:07:06 GMT",
"version": "v1"
}
] | 2016-07-14 | [
[
"Garner",
"Christopher",
""
],
[
"Vollick",
"Dan N.",
""
]
] | It has been shown that the Gupta-Bleuler method of quantization can be used to impose the Lorentz gauge condition in static space-times but not in cosmological space-times. This implies that the Gupta-Bleuler approach fails in general in non-static space-times. More recently, however, the Dirac method of quantizing con... |
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