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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2401.12054 | Pujian Mao | Pujian Mao and Weicheng Zhao | Twisting asymptotic symmetries and algebraically special vacuum
solutions | v3: more details and discussions on the twisting charge presented,
refs. added | JHEP 03 (2024) 166 | 10.1007/JHEP03(2024)166 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we study asymptotic symmetries and algebraically special exact
solutions in the Newman-Penrose formalism. Removing the hypersurface orthogonal
condition in the well studied Newman-Unti gauge, we obtain a generic asymptotic
solution space which includes all possible origins of propagating degree of
free... | [
{
"created": "Mon, 22 Jan 2024 15:46:40 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jan 2024 15:59:05 GMT",
"version": "v2"
},
{
"created": "Fri, 29 Mar 2024 13:36:31 GMT",
"version": "v3"
}
] | 2024-04-01 | [
[
"Mao",
"Pujian",
""
],
[
"Zhao",
"Weicheng",
""
]
] | In this paper, we study asymptotic symmetries and algebraically special exact solutions in the Newman-Penrose formalism. Removing the hypersurface orthogonal condition in the well studied Newman-Unti gauge, we obtain a generic asymptotic solution space which includes all possible origins of propagating degree of freedo... |
2311.04201 | Jose Beltr\'an Jim\'enez | D\'ebora Aguiar Gomes, Jose Beltr\'an Jim\'enez, Alejandro Jim\'enez
Cano and Tomi S. Koivisto | Pathological Character of Modifications to Coincident General
Relativity: Cosmological Strong Coupling and Ghosts in $f(\Q)$ Theories | 5 pages. V2: Some clarifications added. Version accepted for
publication | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The intrinsic presence of ghosts in the symmetric teleparallel framework is
elucidated. We illustrate our general arguments in $f(\mathbb{Q})$ theories by
studying perturbations in the three inequivalent spatially flat cosmologies.
Two of these branches exhibit reduced linear spectra, signalling they are
infinitely s... | [
{
"created": "Tue, 7 Nov 2023 18:40:47 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Mar 2024 18:21:23 GMT",
"version": "v2"
}
] | 2024-03-15 | [
[
"Gomes",
"Débora Aguiar",
""
],
[
"Jiménez",
"Jose Beltrán",
""
],
[
"Cano",
"Alejandro Jiménez",
""
],
[
"Koivisto",
"Tomi S.",
""
]
] | The intrinsic presence of ghosts in the symmetric teleparallel framework is elucidated. We illustrate our general arguments in $f(\mathbb{Q})$ theories by studying perturbations in the three inequivalent spatially flat cosmologies. Two of these branches exhibit reduced linear spectra, signalling they are infinitely str... |
1310.3320 | Ryan Lang | Ryan N. Lang | Compact binary systems in scalar-tensor gravity. II. Tensor
gravitational waves to second post-Newtonian order | 44 pages | Phys. Rev. D 89, 084014 (2014) | 10.1103/PhysRevD.89.084014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the tensor gravitational waveform generated by a binary of
nonspinning compact objects (black holes or neutron stars) in a general class
of scalar-tensor theories of gravity. The waveform is accurate to second
post-Newtonian order beyond the leading order quadrupole approximation. We use
the direct integrat... | [
{
"created": "Sat, 12 Oct 2013 00:55:17 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Apr 2014 01:19:19 GMT",
"version": "v2"
}
] | 2014-04-15 | [
[
"Lang",
"Ryan N.",
""
]
] | We derive the tensor gravitational waveform generated by a binary of nonspinning compact objects (black holes or neutron stars) in a general class of scalar-tensor theories of gravity. The waveform is accurate to second post-Newtonian order beyond the leading order quadrupole approximation. We use the direct integratio... |
1202.0394 | Mariafelicia De Laurentis Dr. | M. De Laurentis, S. Capozziello | Black holes and stellar structures in f(R)-gravity | 29 pages, 4 figures, 2 tables, to appear in the Volume: "Black Holes:
Evolution, Theory and Thermodynamics", Nova Publishers. 2012. arXiv admin
note: substantial text overlap with arXiv:0912.5286, arXiv:1101.0219, and
text overlap with arXiv:gr-qc/9703084 by other authors | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review black hole solutions and self-gravitating structures in
f(R)-gravity.
| [
{
"created": "Thu, 2 Feb 2012 09:58:20 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Feb 2012 10:13:14 GMT",
"version": "v2"
}
] | 2012-02-06 | [
[
"De Laurentis",
"M.",
""
],
[
"Capozziello",
"S.",
""
]
] | We review black hole solutions and self-gravitating structures in f(R)-gravity. |
2005.04659 | Naqing Xie | Xiaokai He and Naqing Xie | Quasi-local energy and Oppenheimer-Snyder collapse | 10 pages, 1 figure, references added, accepted for publication in
Classical and Quantum Gravity | Class. Quantum Grav. 37 (2020) 185016 | 10.1088/1361-6382/aba31c | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a scenario of the gravitational collapse of the
Oppenheimer-Snyder dust cloud with spatially constant matter density. Given a
closed two-surface within the star, three versions of the quasi-local energy
are investigated. We show that, during the collapse, (i) the Geroch energy of
the surface is nonpositiv... | [
{
"created": "Sun, 10 May 2020 13:26:23 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jul 2020 10:26:27 GMT",
"version": "v2"
}
] | 2020-08-26 | [
[
"He",
"Xiaokai",
""
],
[
"Xie",
"Naqing",
""
]
] | We consider a scenario of the gravitational collapse of the Oppenheimer-Snyder dust cloud with spatially constant matter density. Given a closed two-surface within the star, three versions of the quasi-local energy are investigated. We show that, during the collapse, (i) the Geroch energy of the surface is nonpositive ... |
1802.02263 | Joseph Schindler | J C Schindler, A Aguirre | Algorithms for the explicit computation of Penrose diagrams | 54 pages, 19 figures | Class. Quantum Grav. 35, 105019 (2018) | 10.1088/1361-6382/aabce2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An algorithm is given for explicitly computing Penrose diagrams for
spacetimes of the form $ds^2 = -f(r)\, dt^2 + f(r)^{-1} \, dr^2 + r^2 \,
d\Omega^2$. The resulting diagram coordinates are shown to extend the metric
continuously and nondegenerately across an arbitrary number of horizons. The
method is extended to i... | [
{
"created": "Tue, 6 Feb 2018 23:36:12 GMT",
"version": "v1"
}
] | 2021-04-16 | [
[
"Schindler",
"J C",
""
],
[
"Aguirre",
"A",
""
]
] | An algorithm is given for explicitly computing Penrose diagrams for spacetimes of the form $ds^2 = -f(r)\, dt^2 + f(r)^{-1} \, dr^2 + r^2 \, d\Omega^2$. The resulting diagram coordinates are shown to extend the metric continuously and nondegenerately across an arbitrary number of horizons. The method is extended to inc... |
2012.07649 | Martin Bojowald | Kallan Berglund, Martin Bojowald, Manuel Diaz, Gianni Sims | Quasiclassical solutions for static quantum black holes | 31 pages, 1 figure; v2: additional discussions of consistency
conditions and asymptotic behavior | Phys. Rev. D 109 (2024) 024006 | 10.1103/PhysRevD.109.024006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new form of quasiclassical space-time dynamics for constrained systems
reveals how quantum effects can be derived systematically from canonical
quantization of gravitational systems. These quasiclassical methods lead to
additional fields, representing quantum fluctuations and higher moments, that
are coupled to the... | [
{
"created": "Mon, 14 Dec 2020 15:44:12 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Nov 2023 19:18:15 GMT",
"version": "v2"
}
] | 2024-01-04 | [
[
"Berglund",
"Kallan",
""
],
[
"Bojowald",
"Martin",
""
],
[
"Diaz",
"Manuel",
""
],
[
"Sims",
"Gianni",
""
]
] | A new form of quasiclassical space-time dynamics for constrained systems reveals how quantum effects can be derived systematically from canonical quantization of gravitational systems. These quasiclassical methods lead to additional fields, representing quantum fluctuations and higher moments, that are coupled to the c... |
1812.02659 | Thomas Schucker | Thomas Schucker | The gauge theoretical underpinnings of general relativity | 12 pages, 3 figures. Contribution to the Heraeus-Seminar "100 Years
of Gauge Theory" organized by Silvia De Bianchi and Claus Kiefer, 30 July - 3
August 2018, Physikzentrum Bad Honnef. To appear in the proceedings "100
Years of Gauge Theory. Past, present and future perspectives" in the series
`Fundamental Theo... | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gauge theoretical formulation of general relativity is presented. We are
only concerned with local intrinsic geometry, i.e. our space-time is an open
subset of a four-dimensional real vector space. Then the gauge group is the set
of differentiable maps from this open subset into the general linear group or
into t... | [
{
"created": "Thu, 6 Dec 2018 16:54:30 GMT",
"version": "v1"
}
] | 2018-12-07 | [
[
"Schucker",
"Thomas",
""
]
] | The gauge theoretical formulation of general relativity is presented. We are only concerned with local intrinsic geometry, i.e. our space-time is an open subset of a four-dimensional real vector space. Then the gauge group is the set of differentiable maps from this open subset into the general linear group or into the... |
gr-qc/9306027 | Alan Rendall | J. Rauch and A. D. Rendall | Blow-Up of Test Fields Near Cauchy Horizons | 10 pages, Plain TeX, MPA-AR-92-1 | Lett.Math.Phys. 29 (1993) 241-248 | 10.1007/BF00750958 | null | gr-qc | null | The behaviour of test fields near a compact Cauchy horizon is investigated.
It is shown that solutions of nonlinear wave equations on Taub spacetime with
generic initial data cannot be continued smoothly to both extensions of the
spacetime through the Cauchy horizon. This is proved using an energy method.
Similar res... | [
{
"created": "Wed, 23 Jun 1993 07:51:46 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Rauch",
"J.",
""
],
[
"Rendall",
"A. D.",
""
]
] | The behaviour of test fields near a compact Cauchy horizon is investigated. It is shown that solutions of nonlinear wave equations on Taub spacetime with generic initial data cannot be continued smoothly to both extensions of the spacetime through the Cauchy horizon. This is proved using an energy method. Similar resul... |
gr-qc/9707002 | Riccardo Giannitrapani | E.Fabri and R.Giannitrapani | Combinatorial Tools for Regge Calculus | 5 pages, LaTeX, no figures. To appear on the Proceedings of the 12th
Italian Conference on General Relativity and Gravitational Physics | null | null | null | gr-qc | null | In this short note we briefly review some recent mathematical results
relevant to the classical Regge Calculus evolution problem.
| [
{
"created": "Tue, 1 Jul 1997 14:33:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Fabri",
"E.",
""
],
[
"Giannitrapani",
"R.",
""
]
] | In this short note we briefly review some recent mathematical results relevant to the classical Regge Calculus evolution problem. |
1803.04306 | F Shojai | H. Khodabakhshi, F. Shojai and A. Shirzad | On the classification of consistent boundary conditions for $
\mathit{f}(\mathit{R})$-Gravity | 21 pages | Eur. Phys. J. C (2018) 78:1003 | 10.1140/epjc/s10052-018-6494-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using a completely covariant approach, we discuss the role of boundary
conditions (BCs) and the corresponding Gibbons--Hawking--York (GHY) terms in $
\mathit{f}(\mathit{R}) $-gravity in arbitrary dimensions. We show that $
f(\mathit{R}) $-gravity, as a higher derivative theory, is not described by a
degenerate Lagran... | [
{
"created": "Mon, 12 Mar 2018 15:20:38 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Mar 2018 07:00:33 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Oct 2018 17:54:58 GMT",
"version": "v3"
}
] | 2019-01-01 | [
[
"Khodabakhshi",
"H.",
""
],
[
"Shojai",
"F.",
""
],
[
"Shirzad",
"A.",
""
]
] | Using a completely covariant approach, we discuss the role of boundary conditions (BCs) and the corresponding Gibbons--Hawking--York (GHY) terms in $ \mathit{f}(\mathit{R}) $-gravity in arbitrary dimensions. We show that $ f(\mathit{R}) $-gravity, as a higher derivative theory, is not described by a degenerate Lagrangi... |
2402.10406 | Yan-Gang Miao | Yang Guo, Hao Xie, Yan-Gang Miao | Signal of phase transition hidden in quasinormal modes of regular AdS
black holes | v1: 14 pages, 8 figures, 2 tables; v2: 15 pages, 9 figures,
clarifications and references added, final version to appear in Physics
Letters B | Phys. Lett. B 855 (2024) 138801 | 10.1016/j.physletb.2024.138801 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the intrinsic relations between thermodynamic phase transitions
and quasinormal modes in regular AdS black holes, specifically in the Bardeen
and Hayward AdS classes. To this end, we calculate the quasinormal modes of
massless scalar field perturbations around small and large black holes via the
Horowitz-H... | [
{
"created": "Fri, 16 Feb 2024 02:15:06 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Jun 2024 07:12:39 GMT",
"version": "v2"
}
] | 2024-06-18 | [
[
"Guo",
"Yang",
""
],
[
"Xie",
"Hao",
""
],
[
"Miao",
"Yan-Gang",
""
]
] | We discuss the intrinsic relations between thermodynamic phase transitions and quasinormal modes in regular AdS black holes, specifically in the Bardeen and Hayward AdS classes. To this end, we calculate the quasinormal modes of massless scalar field perturbations around small and large black holes via the Horowitz-Hub... |
2407.07792 | Hugo Roussille | Hugo Roussille, Fran\c{c}ois Larrouturou | Gravitational ringdown in the Minimal Theory of Massive Gravity | 17+10 pages, 2 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | This work focuses on gravitational perturbations of black holes in the
self-accelerating branch of the Minimal Theory of Massive Gravity (MTMG). This
theory is a healthy extension of GR which displays the feature of massive
tensor modes, without additional polarizations, strong-coupling issues nor
requiring screening... | [
{
"created": "Wed, 10 Jul 2024 16:09:37 GMT",
"version": "v1"
}
] | 2024-07-11 | [
[
"Roussille",
"Hugo",
""
],
[
"Larrouturou",
"François",
""
]
] | This work focuses on gravitational perturbations of black holes in the self-accelerating branch of the Minimal Theory of Massive Gravity (MTMG). This theory is a healthy extension of GR which displays the feature of massive tensor modes, without additional polarizations, strong-coupling issues nor requiring screening m... |
0809.4819 | Xin Han H.X | Huarun Li, Yi Ling, Xin Han | Modified (A)dS Schwarzschild black holes in Rainbow spacetime | 11 pages. The version to appear in CQG | Class.Quant.Grav.26:065004,2009 | 10.1088/0264-9381/26/6/065004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A modified (Anti-)de Sitter Schwarzschild black hole solution is presented in
the framework of rainbow gravity with a cosmological constant. Its
thermodynamical properties are investigated. In general the temperature of
modified black holes is dependent on the energy of probes which take the
measurement. However, a n... | [
{
"created": "Sun, 28 Sep 2008 04:41:14 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Feb 2009 02:45:58 GMT",
"version": "v2"
}
] | 2009-03-27 | [
[
"Li",
"Huarun",
""
],
[
"Ling",
"Yi",
""
],
[
"Han",
"Xin",
""
]
] | A modified (Anti-)de Sitter Schwarzschild black hole solution is presented in the framework of rainbow gravity with a cosmological constant. Its thermodynamical properties are investigated. In general the temperature of modified black holes is dependent on the energy of probes which take the measurement. However, a not... |
gr-qc/9909025 | Luca Lusanna | Luca Lusanna (Firenze) and Roberto de Pietri (Marseille) | Tetrad Gravity: III) Asymptotic Poincare' Charges, the Physical
Hamiltonian and Void Spacetimes | 140 pages, revtex file | null | null | FI-TH/48/99 | gr-qc astro-ph hep-th | null | A discussion of asymptotic weak and strong Poincare' charges in metric
gravity is given to identify the proper Hamiltonian boundary conditions. The
asymptotic part of the lapse and shift functions is put equal to their
analogues on Minkowski hyperplanes. By adding Dirac's ten extra variables at
spatial infinity, metr... | [
{
"created": "Tue, 7 Sep 1999 11:15:23 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lusanna",
"Luca",
"",
"Firenze"
],
[
"de Pietri",
"Roberto",
"",
"Marseille"
]
] | A discussion of asymptotic weak and strong Poincare' charges in metric gravity is given to identify the proper Hamiltonian boundary conditions. The asymptotic part of the lapse and shift functions is put equal to their analogues on Minkowski hyperplanes. By adding Dirac's ten extra variables at spatial infinity, metric... |
0710.2032 | James Lindesay | Beth A. Brown, James Lindesay | Construction of a Penrose Diagram for a Spatially Coherent Evaporating
Black Hole | 12 pages, 3 figures | Class.Quant.Grav.25:105026,2008 | 10.1088/0264-9381/25/10/105026 | null | gr-qc | null | A Penrose diagram is constructed for an example black hole that evaporates at
a steady rate as measured by a distant observer, until the mass vanishes,
yielding a final state Minkowski space-time. Coordinate dependencies of
significant features, such as the horizon and coordinate anomalies, are clearly
demonstrated o... | [
{
"created": "Wed, 10 Oct 2007 14:52:11 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Brown",
"Beth A.",
""
],
[
"Lindesay",
"James",
""
]
] | A Penrose diagram is constructed for an example black hole that evaporates at a steady rate as measured by a distant observer, until the mass vanishes, yielding a final state Minkowski space-time. Coordinate dependencies of significant features, such as the horizon and coordinate anomalies, are clearly demonstrated on ... |
1306.1159 | Richard Price | Richard H. Price, Gaurav Khanna, Scott A. Hughes | Black hole binary inspiral and trajectory dominance | 15 pages, 12 figures | null | 10.1103/PhysRevD.88.104004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves emitted during the inspiral, plunge and merger of a black
hole binary carry linear momentum. This results in an astrophysically important
recoil to the final merged black hole, a ``kick'' that can eject it from the
nucleus of a galaxy. In a previous paper we showed that the puzzling partial
cancel... | [
{
"created": "Wed, 5 Jun 2013 16:12:13 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Price",
"Richard H.",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Hughes",
"Scott A.",
""
]
] | Gravitational waves emitted during the inspiral, plunge and merger of a black hole binary carry linear momentum. This results in an astrophysically important recoil to the final merged black hole, a ``kick'' that can eject it from the nucleus of a galaxy. In a previous paper we showed that the puzzling partial cancella... |
1809.06740 | Arkady A. Popov | A. Popov, O. Aslan | Scalar self-force on static charge in a long throat | 11 pages, 1 figure. arXiv admin note: text overlap with
arXiv:1111.6286 | International Journal of Modern Physics A, Vol. 30, No. 22,
1550143 (2015) | 10.1142/S0217751X15501432 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the self-force on a scalar charge at rest in the spacetime of long
throat. We consider arbitrary values of the mass of the scalar field and the
constant of nonmnimal coupling of the scalar field to the curvature of
spacetime. We also show the coincidence of explicit calculations of self-force
in the limit ... | [
{
"created": "Mon, 17 Sep 2018 13:31:56 GMT",
"version": "v1"
}
] | 2018-09-19 | [
[
"Popov",
"A.",
""
],
[
"Aslan",
"O.",
""
]
] | We compute the self-force on a scalar charge at rest in the spacetime of long throat. We consider arbitrary values of the mass of the scalar field and the constant of nonmnimal coupling of the scalar field to the curvature of spacetime. We also show the coincidence of explicit calculations of self-force in the limit of... |
gr-qc/9708008 | Petr Hajicek | P. Hajicek, Berne | Spherically symmetric gravitating shell as a reparametrization invariant
system | Some sign errors are corrected and a new result is added: Poisson
brackets between no two independent spacetime coordinates of the shell vanish
at any intersection of two horizons | null | 10.1103/PhysRevD.57.936 | null | gr-qc | null | The subject of this paper are spherically symmetric thin shells made of
barotropic ideal fluid and moving under the influence of their own
gravitational field as well as that of a central black hole; the cosmological
constant is assumed to be zero. The general super-Hamiltonian derived in a
previous paper is rewritte... | [
{
"created": "Tue, 5 Aug 1997 13:55:57 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Aug 1997 13:37:24 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Hajicek",
"P.",
""
],
[
"Berne",
"",
""
]
] | The subject of this paper are spherically symmetric thin shells made of barotropic ideal fluid and moving under the influence of their own gravitational field as well as that of a central black hole; the cosmological constant is assumed to be zero. The general super-Hamiltonian derived in a previous paper is rewritten ... |
1008.1158 | Vladim\'ir Balek | Vladim\'ir Balek and Branislav Novotn\'y | Evolution of a black hole-inhabited brane close to reconnection | 20 pages, 4 figures | Phys.Rev.D83:024013,2011 | 10.1103/PhysRevD.83.024013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Last moments of a mini black hole escaping from a brane are studied. It is
argued that at the point of reconnection, where the piece of the brane attached
to the black hole separates from the rest, the worldsheet of the brane becomes
isotropic (light-like). The degenerate mode of evolution, with the worldsheet
isotro... | [
{
"created": "Fri, 6 Aug 2010 11:00:10 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Nov 2010 16:38:50 GMT",
"version": "v2"
}
] | 2011-02-01 | [
[
"Balek",
"Vladimír",
""
],
[
"Novotný",
"Branislav",
""
]
] | Last moments of a mini black hole escaping from a brane are studied. It is argued that at the point of reconnection, where the piece of the brane attached to the black hole separates from the rest, the worldsheet of the brane becomes isotropic (light-like). The degenerate mode of evolution, with the worldsheet isotropi... |
2302.09137 | Ernesto Contreras | Eduardo L\'opez, Pedro Bargue\~no, Ernesto Contreras | GUP corrections to black hole thermodynamics in the extended phase space
approach | null | Int. J. Mod. Phys. D, Vol. 31, No. 16, 2250125 (2022) | 10.1142/S0218271822501255 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we study corrections to black hole temperature and entropy in
the context of the generalized uncertainty principle. In particular, we obtain
corrected asymptotically anti de-Sitter black hole solutions following the
extended phase space scheme in which the cosmological constant is considered as
a thermo... | [
{
"created": "Fri, 17 Feb 2023 21:00:52 GMT",
"version": "v1"
}
] | 2023-02-21 | [
[
"López",
"Eduardo",
""
],
[
"Bargueño",
"Pedro",
""
],
[
"Contreras",
"Ernesto",
""
]
] | In this work, we study corrections to black hole temperature and entropy in the context of the generalized uncertainty principle. In particular, we obtain corrected asymptotically anti de-Sitter black hole solutions following the extended phase space scheme in which the cosmological constant is considered as a thermody... |
1504.00672 | Yuki Watanabe | Yuki Watanabe (Tokyo U., RESCEU & Gunma Coll. Tech.), Atsushi Naruko
(Tokyo Inst. Tech.), Misao Sasaki (Kyoto U., Yukawa Inst., Kyoto) | Multi-disformal invariance of nonlinear primordial perturbations | 8 pages | null | 10.1209/0295-5075/111/39002 | RESCEU-7-15, YITP-15-23 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study disformal transformations of the metric in the cosmological context.
We first consider the disformal transformation generated by a scalar field
$\phi$ and show that the curvature and tensor perturbations on the uniform
$\phi$ slicing, on which the scalar field is homogeneous, are non-linearly
invariant under... | [
{
"created": "Thu, 2 Apr 2015 10:06:16 GMT",
"version": "v1"
}
] | 2015-09-02 | [
[
"Watanabe",
"Yuki",
"",
"Tokyo U., RESCEU & Gunma Coll. Tech."
],
[
"Naruko",
"Atsushi",
"",
"Tokyo Inst. Tech."
],
[
"Sasaki",
"Misao",
"",
"Kyoto U., Yukawa Inst., Kyoto"
]
] | We study disformal transformations of the metric in the cosmological context. We first consider the disformal transformation generated by a scalar field $\phi$ and show that the curvature and tensor perturbations on the uniform $\phi$ slicing, on which the scalar field is homogeneous, are non-linearly invariant under t... |
gr-qc/0607004 | Clovis Jacinto de Matos | Clovis Jacinto de Matos | Gravitoelectromagnetism and Dark Energy in Superconductors | 10 pages. Poster presented at "From Quantum to Cosmos - Fundamental
Physics Research in Space" 22-24 May 2006, To Appear in Int. J. Mod. Phys. D | Int.J.Mod.Phys.D16:2599-2606,2008 | 10.1142/S0218271807011292 | null | gr-qc | null | A gravitomagnetic analogue of the London moment in superconductors can
explain the anomalous Cooper pair mass excess reported by Janet Tate.
Ultimately the gravitomagnetic London moment is attributed to the breaking of
the principle of general covariance in superconductors. This naturally implies
non-conservation of ... | [
{
"created": "Mon, 3 Jul 2006 12:02:21 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"de Matos",
"Clovis Jacinto",
""
]
] | A gravitomagnetic analogue of the London moment in superconductors can explain the anomalous Cooper pair mass excess reported by Janet Tate. Ultimately the gravitomagnetic London moment is attributed to the breaking of the principle of general covariance in superconductors. This naturally implies non-conservation of cl... |
gr-qc/9404026 | null | F. Englert, S. Massar and R. Parentani | Source Vacuum Fluctuations of Black Hole Radiance | 33 pages, ULB-TH 03/94, 5 figures not included, available on request
from F.E. (problem with truncation of long lines) | Class.Quant.Grav.11:2919-2938,1994 | 10.1088/0264-9381/11/12/008 | null | gr-qc hep-th | null | The emergence of Hawking radiation from vacuum fluctuations is analyzed in
conventional field theories and their energy content is defined through the
Aharonov weak value concept. These fluctuations travel in flat space-time and
carry transplanckian energies sharply localized on cisplanckian distances. We
argue that ... | [
{
"created": "Wed, 13 Apr 1994 15:02:18 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Apr 1994 13:07:55 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Englert",
"F.",
""
],
[
"Massar",
"S.",
""
],
[
"Parentani",
"R.",
""
]
] | The emergence of Hawking radiation from vacuum fluctuations is analyzed in conventional field theories and their energy content is defined through the Aharonov weak value concept. These fluctuations travel in flat space-time and carry transplanckian energies sharply localized on cisplanckian distances. We argue that th... |
1402.4146 | Michael P\"urrer | Michael P\"urrer | Frequency domain reduced order models for gravitational waves from
aligned-spin compact binaries | 36 pages, 19 figures, version published in CQG | Class. Quantum Grav. 31 195010, 2014 | 10.1088/0264-9381/31/19/195010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black-hole binary coalescences are one of the most promising sources for the
first detection of gravitational waves. Fast and accurate theoretical models of
the gravitational radiation emitted from these coalescences are highly
important for the detection and extraction of physical parameters. Spinning
effective-one-... | [
{
"created": "Mon, 17 Feb 2014 21:10:55 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Oct 2014 16:23:54 GMT",
"version": "v2"
}
] | 2014-10-17 | [
[
"Pürrer",
"Michael",
""
]
] | Black-hole binary coalescences are one of the most promising sources for the first detection of gravitational waves. Fast and accurate theoretical models of the gravitational radiation emitted from these coalescences are highly important for the detection and extraction of physical parameters. Spinning effective-one-bo... |
2101.00176 | Vinod Bhardwaj Dr. | Anirudh Pradhan, Archana Dixit, Vinod Kumar Bhardwaj | Barrow HDE model for Statefinder diagnostic in FLRW Universe | 16 pages, 8 figures, Paper accepted in Int. J. Mod. Phys. A | Int. J. Mod. Phys. A, Vol. 36, Issue 04, 10 Feb (2021) 2150030 (13
pages) | 10.1142/S0217751X21500305 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We have analyzed the Barrow holographic dark energy (BHDE) in the framework
of the flat FLRW Universe by considering the various estimations of Barrow
exponent $\triangle$. Here we define BHDE, by applying the usual holographic
principle at a cosmological system, for utilizing the Barrow entropy rather
than the stand... | [
{
"created": "Fri, 1 Jan 2021 06:09:17 GMT",
"version": "v1"
}
] | 2021-08-02 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Dixit",
"Archana",
""
],
[
"Bhardwaj",
"Vinod Kumar",
""
]
] | We have analyzed the Barrow holographic dark energy (BHDE) in the framework of the flat FLRW Universe by considering the various estimations of Barrow exponent $\triangle$. Here we define BHDE, by applying the usual holographic principle at a cosmological system, for utilizing the Barrow entropy rather than the standar... |
2407.01359 | \'Angel Murcia | Bernardo Araneda and \'Angel J. Murcia | Generalized Siklos space-times | 14 pages. Two appendices | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by supersymmetry methods in general relativity, we study
four-dimensional Lorentzian space-times with a complex Dirac spinor field
satisfying a Killing-spinor-like equation where the Killing constant is
promoted to a complex function. We call the resulting geometry a generalized
Siklos space-time. After der... | [
{
"created": "Mon, 1 Jul 2024 15:12:49 GMT",
"version": "v1"
}
] | 2024-07-02 | [
[
"Araneda",
"Bernardo",
""
],
[
"Murcia",
"Ángel J.",
""
]
] | Motivated by supersymmetry methods in general relativity, we study four-dimensional Lorentzian space-times with a complex Dirac spinor field satisfying a Killing-spinor-like equation where the Killing constant is promoted to a complex function. We call the resulting geometry a generalized Siklos space-time. After deriv... |
1405.2098 | Richard Brito | Richard Brito, Vitor Cardoso, Paolo Pani | Superradiant instability of black holes immersed in a magnetic field | 13 pages, 6 figures. v2: references added, matches published version | Phys.Rev.D89:104045,2014 | 10.1103/PhysRevD.89.104045 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Magnetic fields surrounding spinning black holes can confine radiation and
trigger superradiant instabilities. To investigate this effect, we perform the
first fully-consistent linear analysis of the Ernst spacetime, an exact
solution of the Einstein--Maxwell equations describing a black hole immersed in
a uniform ma... | [
{
"created": "Thu, 8 May 2014 21:05:01 GMT",
"version": "v1"
},
{
"created": "Tue, 27 May 2014 20:40:02 GMT",
"version": "v2"
}
] | 2014-05-29 | [
[
"Brito",
"Richard",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Pani",
"Paolo",
""
]
] | Magnetic fields surrounding spinning black holes can confine radiation and trigger superradiant instabilities. To investigate this effect, we perform the first fully-consistent linear analysis of the Ernst spacetime, an exact solution of the Einstein--Maxwell equations describing a black hole immersed in a uniform magn... |
2006.03939 | Badri Krishnan | Daniel Pook-Kolb, Ofek Birnholtz, Jose Luis Jaramillo, Badri Krishnan
and Erik Schnetter | Horizons in a binary black hole merger I: Geometry and area increase | 20 pages, 14 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent advances in numerical relativity have revealed how marginally trapped
surfaces behave when black holes merge. It is now known that interesting
topological features emerge during the merger, and marginally trapped surfaces
can have self-intersections. This paper presents the most detailed study yet of
the physi... | [
{
"created": "Sat, 6 Jun 2020 18:56:18 GMT",
"version": "v1"
}
] | 2020-06-09 | [
[
"Pook-Kolb",
"Daniel",
""
],
[
"Birnholtz",
"Ofek",
""
],
[
"Jaramillo",
"Jose Luis",
""
],
[
"Krishnan",
"Badri",
""
],
[
"Schnetter",
"Erik",
""
]
] | Recent advances in numerical relativity have revealed how marginally trapped surfaces behave when black holes merge. It is now known that interesting topological features emerge during the merger, and marginally trapped surfaces can have self-intersections. This paper presents the most detailed study yet of the physica... |
gr-qc/0309002 | Anzhong Wang | Yumei Wu, M.F.A. da Silva, N.O. Santos, and Anzhong Wang | Topological Charged Black Holes in High Dimensional Spacetimes and Their
Formation from Gravitational Collapse of a Type II Fluid | 14 figures, to appear in Phys. Rev. D | Phys.Rev.D68:084012,2003 | 10.1103/PhysRevD.68.084012 | null | gr-qc hep-th | null | Topological charged black holes coupled with a cosmological constant in
$R^{2}\times X^{D-2}$ spacetimes are studied, where $X^{D-2}$ is an Einstein
space of the form ${}^{(D-2)}R_{AB} = k(D-3) h_{AB}$. The global structure for
the four-dimensional spacetimes with $k = 0$ is investigated systematically.
The most gene... | [
{
"created": "Sat, 30 Aug 2003 20:03:18 GMT",
"version": "v1"
}
] | 2009-07-07 | [
[
"Wu",
"Yumei",
""
],
[
"da Silva",
"M. F. A.",
""
],
[
"Santos",
"N. O.",
""
],
[
"Wang",
"Anzhong",
""
]
] | Topological charged black holes coupled with a cosmological constant in $R^{2}\times X^{D-2}$ spacetimes are studied, where $X^{D-2}$ is an Einstein space of the form ${}^{(D-2)}R_{AB} = k(D-3) h_{AB}$. The global structure for the four-dimensional spacetimes with $k = 0$ is investigated systematically. The most genera... |
2312.16021 | Alexey Golovnev | Alexey Golovnev, A. N. Semenova, V.P. Vandeev | Conformal Transformations and Cosmological Perturbations in New General
Relativity | 17 pages; the final version | Journal of Cosmology and Astroparticle Physics, JCAP04(2024)064 | 10.1088/1475-7516/2024/04/064 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study conformal transformations in the most general parity-preserving
models of the New General Relativity type. Then we apply them to analysis of
cosmological perturbations in the (simplest) spatially flat cosmologies. Strong
coupling issues around Minkowski spacetime are seen for many special cases of
these mode... | [
{
"created": "Tue, 26 Dec 2023 12:21:01 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Jan 2024 16:32:11 GMT",
"version": "v2"
},
{
"created": "Sun, 24 Mar 2024 07:21:50 GMT",
"version": "v3"
}
] | 2024-04-24 | [
[
"Golovnev",
"Alexey",
""
],
[
"Semenova",
"A. N.",
""
],
[
"Vandeev",
"V. P.",
""
]
] | We study conformal transformations in the most general parity-preserving models of the New General Relativity type. Then we apply them to analysis of cosmological perturbations in the (simplest) spatially flat cosmologies. Strong coupling issues around Minkowski spacetime are seen for many special cases of these models... |
gr-qc/0411048 | Vitor Cardoso | Vitor Cardoso | A note on the resonant frequencies of rapidly rotating black holes | 5 pages, ReVTeX 4 | Phys.Rev. D70 (2004) 127502 | 10.1103/PhysRevD.70.127502 | null | gr-qc astro-ph hep-th | null | I discuss the range of validity of Detweiler's formula for the resonant
frequencies of rapidly rotating Kerr black holes. While his formula is correct
for extremal black holes, it has also been commonly accepted that it describes
very well the resonant frequencies of near extremal black holes, and that
therefore ther... | [
{
"created": "Tue, 9 Nov 2004 14:31:25 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Cardoso",
"Vitor",
""
]
] | I discuss the range of validity of Detweiler's formula for the resonant frequencies of rapidly rotating Kerr black holes. While his formula is correct for extremal black holes, it has also been commonly accepted that it describes very well the resonant frequencies of near extremal black holes, and that therefore there ... |
gr-qc/0612167 | Sabine Hossenfelder | S. Hossenfelder | Deformed Special Relativity in Position Space | replaced with published version. due to page limits this version is
significantly shorter than the 1st | Phys.Lett.B649:310-316,2007 | 10.1016/j.physletb.2007.04.019 | null | gr-qc hep-th | null | We investigate how deformations of special relativity in momentum space can
be extended to position space in a consistent way, such that the dimensionless
contraction between wave-vector and coordinate-vector remains invariant. By
using a parametrization in terms of an energy dependent speed of light, and an
energy d... | [
{
"created": "Tue, 26 Dec 2006 11:47:23 GMT",
"version": "v1"
},
{
"created": "Fri, 25 May 2007 02:28:15 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Hossenfelder",
"S.",
""
]
] | We investigate how deformations of special relativity in momentum space can be extended to position space in a consistent way, such that the dimensionless contraction between wave-vector and coordinate-vector remains invariant. By using a parametrization in terms of an energy dependent speed of light, and an energy dep... |
1509.08587 | Jung-Jeng Huang | Jung-Jeng Huang | Evaluation of the cosmological constant in inflation with a massive
non-minimal scalar field | null | Advances in High Energy Physics, volume 2015 (2015), Article ID
569789, 7 pages | 10.1155/2015/569789 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Schroedinger picture we study the possible effects of trans-Planckian
physics on the quantum evolution of massive non-minimally coupled scalar field
in de Sitter space. For the nonlinear Corley-Jacobson type dispersion relations
with quartic or sextic correction, we obtain the time evolution of the vacuum
state wa... | [
{
"created": "Tue, 29 Sep 2015 04:50:40 GMT",
"version": "v1"
}
] | 2015-09-30 | [
[
"Huang",
"Jung-Jeng",
""
]
] | In Schroedinger picture we study the possible effects of trans-Planckian physics on the quantum evolution of massive non-minimally coupled scalar field in de Sitter space. For the nonlinear Corley-Jacobson type dispersion relations with quartic or sextic correction, we obtain the time evolution of the vacuum state wave... |
0710.5067 | Michele Castellana | M. Castellana, G. Montani | Physical state condition in Quantum General Relativity as a consequence
of BRST symmetry | 8 pages | Classical and Quantum Gravity 25(10), 105018 (2008); Classical and
Quantum Gravity 25(14): 149802 (2008) | 10.1088/0264-9381/25/10/105018; 10.1088/0264-9381/25/14/149802 | null | gr-qc | null | Quantization of systems with constraints can be carried on with several
methods. In the Dirac formulation the classical generators of gauge
transformations are required to annihilate physical quantum states to ensure
their gauge invariance. Carrying on BRST symmetry it is possible to get a
condition on physical state... | [
{
"created": "Fri, 26 Oct 2007 12:11:57 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Oct 2007 20:20:22 GMT",
"version": "v2"
},
{
"created": "Fri, 2 Nov 2007 12:54:15 GMT",
"version": "v3"
},
{
"created": "Wed, 5 Mar 2008 21:12:44 GMT",
"version": "v4"
},
{
"cre... | 2014-09-09 | [
[
"Castellana",
"M.",
""
],
[
"Montani",
"G.",
""
]
] | Quantization of systems with constraints can be carried on with several methods. In the Dirac formulation the classical generators of gauge transformations are required to annihilate physical quantum states to ensure their gauge invariance. Carrying on BRST symmetry it is possible to get a condition on physical states ... |
1504.01271 | Yungui Gong | Yumei Huang, Yungui Gong, Dicong Liang and Zhu Yi | Thermodynamics of scalar-tensor theory with non-minimally derivative
coupling | 12 pages, no figure, minor corrections | Eur. Phys. J. C 75 (2015) 351 | 10.1140/epjc/s10052-015-3574-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the usual definitions for the entropy and the temperature associated
with the apparent horizon, we show that the unified first law on the apparent
horizon is equivalent to the Friedmann equation for the scalar--tensor theory
with non-minimally derivative coupling. The second law of thermodynamics on the
apparent... | [
{
"created": "Mon, 6 Apr 2015 11:58:25 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jul 2015 09:25:15 GMT",
"version": "v2"
}
] | 2015-07-31 | [
[
"Huang",
"Yumei",
""
],
[
"Gong",
"Yungui",
""
],
[
"Liang",
"Dicong",
""
],
[
"Yi",
"Zhu",
""
]
] | With the usual definitions for the entropy and the temperature associated with the apparent horizon, we show that the unified first law on the apparent horizon is equivalent to the Friedmann equation for the scalar--tensor theory with non-minimally derivative coupling. The second law of thermodynamics on the apparent h... |
2406.09339 | Ulf Leonhardt | Ziv Landau and Ulf Leonhardt | Wigner function method for the Gibbons-Hawking and the Unruh effect | null | null | null | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | An observer at rest with the expanding universe experiences some extra noise
in the quantum vacuum, and so does an accelerated observer in a vacuum at rest
(in Minkowski space). The literature mainly focuses on the ideal cases of
exponential expansion (de-Sitter space) or uniform acceleration (Rindler
trajectories) o... | [
{
"created": "Thu, 13 Jun 2024 17:20:24 GMT",
"version": "v1"
}
] | 2024-06-14 | [
[
"Landau",
"Ziv",
""
],
[
"Leonhardt",
"Ulf",
""
]
] | An observer at rest with the expanding universe experiences some extra noise in the quantum vacuum, and so does an accelerated observer in a vacuum at rest (in Minkowski space). The literature mainly focuses on the ideal cases of exponential expansion (de-Sitter space) or uniform acceleration (Rindler trajectories) or ... |
1706.03430 | Yoni BenTov | Yoni BenTov and Joe Swearngin | Gravitational shockwaves on rotating black holes | v4: Substantially shortened (45 pages). Major casualties:
Point-particle limit of field theory and over 100 footnotes. Minor
casualties: Detailed exposition of background material. Corrections: Formal
redefinition of Ricci and energy scalars from traceless tensors, note about
extrinsic curvature, a stray prime,... | Gen Relativ Gravit (2019) 51: 25 | 10.1007/s10714-019-2512-7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an exact solution of Einstein's equation that describes the
gravitational shockwave of a massless particle on the horizon of a Kerr-Newman
black hole. The backreacted metric is of the generalized Kerr-Schild form and
is Type II in the Petrov classification. We show that if the background frame
is aligned w... | [
{
"created": "Mon, 12 Jun 2017 01:12:35 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Oct 2017 17:40:58 GMT",
"version": "v2"
},
{
"created": "Tue, 20 Feb 2018 22:15:33 GMT",
"version": "v3"
},
{
"created": "Sat, 2 Jun 2018 22:44:33 GMT",
"version": "v4"
},
{
"cr... | 2019-02-06 | [
[
"BenTov",
"Yoni",
""
],
[
"Swearngin",
"Joe",
""
]
] | We present an exact solution of Einstein's equation that describes the gravitational shockwave of a massless particle on the horizon of a Kerr-Newman black hole. The backreacted metric is of the generalized Kerr-Schild form and is Type II in the Petrov classification. We show that if the background frame is aligned wit... |
2401.00048 | Maxime Van de Moortel | Yakov Shlapentokh-Rothman and Maxime Van de Moortel | Polynomial time decay for solutions of the Klein--Gordon equation on a
subextremal Reissner--Nordstr\"{o}m black hole | 76 pages, 2 figures | null | null | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the massive scalar field equation $\Box_{g_{RN}} \phi = m^2 \phi$
on any subextremal Reissner--Nordstr\"{o}m exterior metric $g_{RN}$. We prove
that solutions with localized initial data decay pointwise-in-time at the
polynomial rate $t^{-\frac{5}{6}+\delta}$ in any spatially compact region
(including the... | [
{
"created": "Fri, 29 Dec 2023 19:00:09 GMT",
"version": "v1"
}
] | 2024-01-02 | [
[
"Shlapentokh-Rothman",
"Yakov",
""
],
[
"Van de Moortel",
"Maxime",
""
]
] | We consider the massive scalar field equation $\Box_{g_{RN}} \phi = m^2 \phi$ on any subextremal Reissner--Nordstr\"{o}m exterior metric $g_{RN}$. We prove that solutions with localized initial data decay pointwise-in-time at the polynomial rate $t^{-\frac{5}{6}+\delta}$ in any spatially compact region (including the e... |
gr-qc/9712097 | Hans-Juergen Schmidt | H.-J. Schmidt | Conformal relations and Hamiltonian formulation of fourth-order gravity | 19 pages, LaTeX, no figures, Grav. and Cosmol. to appear February
1998 | Grav.Cosmol. 3 (1997) 266-274 | null | Preprint UNIPO-MATH-97-December-29 | gr-qc | null | The conformal equivalence of fourth-order gravity following from a non-linear
Lagrangian L(R) to theories of other types is widely known, here we report on a
new conformal equivalence of these theories to theories of the same type but
with different Lagrangian.
For a quantization of fourth-order theories one needs ... | [
{
"created": "Mon, 29 Dec 1997 09:43:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Schmidt",
"H. -J.",
""
]
] | The conformal equivalence of fourth-order gravity following from a non-linear Lagrangian L(R) to theories of other types is widely known, here we report on a new conformal equivalence of these theories to theories of the same type but with different Lagrangian. For a quantization of fourth-order theories one needs a Ha... |
1206.1131 | Li Qin | Li Qin, Guo Deng, Yongge Ma | Path Integrals and Alternative Effective Dynamics in Loop Quantum
Cosmology | 8 pages. arXiv admin note: substantial text overlap with
arXiv:1102.4755 | Commun. Theor. Phys. 57 (2012) 326-332 | 10.1088/0253-6102/57/2/28 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The alternative dynamics of loop quantum cosmology is examined by the path
integral formulation. We consider the spatially flat FRW models with a massless
scalar field, where the alternative quantization inherit more features from
full loop quantum gravity. The path integrals can be formulated in both
timeless and de... | [
{
"created": "Wed, 6 Jun 2012 06:52:00 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Qin",
"Li",
""
],
[
"Deng",
"Guo",
""
],
[
"Ma",
"Yongge",
""
]
] | The alternative dynamics of loop quantum cosmology is examined by the path integral formulation. We consider the spatially flat FRW models with a massless scalar field, where the alternative quantization inherit more features from full loop quantum gravity. The path integrals can be formulated in both timeless and depa... |
1608.06889 | Joseph Romano | Joseph D. Romano, Neil J. Cornish | Detection methods for stochastic gravitational-wave backgrounds: a
unified treatment | 240 pages, 88 figures | Living Rev Relativ (2017) 20:2 | 10.1007/s41114-017-0004-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review detection methods that are currently in use or have been proposed
to search for a stochastic background of gravitational radiation. We consider
both Bayesian and frequentist searches using ground-based and space-based laser
interferometers, spacecraft Doppler tracking, and pulsar timing arrays; and we
allow... | [
{
"created": "Wed, 24 Aug 2016 16:28:38 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Apr 2017 16:55:28 GMT",
"version": "v2"
}
] | 2017-04-11 | [
[
"Romano",
"Joseph D.",
""
],
[
"Cornish",
"Neil J.",
""
]
] | We review detection methods that are currently in use or have been proposed to search for a stochastic background of gravitational radiation. We consider both Bayesian and frequentist searches using ground-based and space-based laser interferometers, spacecraft Doppler tracking, and pulsar timing arrays; and we allow f... |
1304.6458 | Georgios Doulis | Florian Beyer, Georgios Doulis, J\"org Frauendiener, Ben Whale | The Spin-2 Equation on Minkowski Background | Contribution to the Proceedings of the Spanish Relativity Meeting ERE
2012, 4 pages | Springer Proc.Math.Stat. 60 (2014) 465-468 | 10.1007/978-3-642-40157-2_71 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The linearised general conformal field equations in their first and second
order form are used to study the behaviour of the spin-2 zero-rest-mass
equation on Minkowski background in the vicinity of space-like infinity.
| [
{
"created": "Wed, 24 Apr 2013 01:13:42 GMT",
"version": "v1"
}
] | 2014-05-20 | [
[
"Beyer",
"Florian",
""
],
[
"Doulis",
"Georgios",
""
],
[
"Frauendiener",
"Jörg",
""
],
[
"Whale",
"Ben",
""
]
] | The linearised general conformal field equations in their first and second order form are used to study the behaviour of the spin-2 zero-rest-mass equation on Minkowski background in the vicinity of space-like infinity. |
1212.6737 | Spiros Cotsakis | Spiros Cotsakis | Structure of infinity in cosmology | v2: 23 pages, various improvements, v3: 21 pages, material on the
Poincar\'e projection in 1D removed as this is now part of arXiv:1301.4778,
v4: matches published version | Int. J. Mod. Phys. D22 (2013) 1330003 | 10.1142/S0218271813300036 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss recent developments related to certain blow up methods suitable
for the analysis of cosmological singularities and asymptotics. We review
results obtained in a variety of currently popular themes and describe ongoing
research about universes with various kinds of extreme states, higher order
gravity, and c... | [
{
"created": "Sun, 30 Dec 2012 15:59:26 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Jan 2013 17:24:44 GMT",
"version": "v2"
},
{
"created": "Tue, 22 Jan 2013 06:58:07 GMT",
"version": "v3"
},
{
"created": "Sat, 9 Feb 2013 13:26:01 GMT",
"version": "v4"
}
] | 2013-10-11 | [
[
"Cotsakis",
"Spiros",
""
]
] | We discuss recent developments related to certain blow up methods suitable for the analysis of cosmological singularities and asymptotics. We review results obtained in a variety of currently popular themes and describe ongoing research about universes with various kinds of extreme states, higher order gravity, and cer... |
1602.01832 | Shahram Panahiyan | S. H. Hendi, B. Eslam Panah and S. Panahiyan | Topological charged black holes in massive gravity's rainbow and their
thermodynamical analysis through various approaches | 13 pages, 3 figure and 1 table. Matches published version | Phys. Lett. B 769, 191 (2017) | 10.1016/j.physletb.2017.03.051 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Violation of Lorentz invariancy in the high energy quantum gravity motivates
one to consider an energy dependent spacetime with massive deformation of
standard general relativity. In this paper, we take into account an energy
dependent metric in the context of a massive gravity model to obtain exact
solutions. We inv... | [
{
"created": "Thu, 4 Feb 2016 08:37:24 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Apr 2017 18:53:58 GMT",
"version": "v2"
}
] | 2017-04-07 | [
[
"Hendi",
"S. H.",
""
],
[
"Panah",
"B. Eslam",
""
],
[
"Panahiyan",
"S.",
""
]
] | Violation of Lorentz invariancy in the high energy quantum gravity motivates one to consider an energy dependent spacetime with massive deformation of standard general relativity. In this paper, we take into account an energy dependent metric in the context of a massive gravity model to obtain exact solutions. We inves... |
1501.03057 | Alejandra Kandus Dr. | Esteban Calzetta and Alejandra Kandus | Non-conformal evolution of magnetic fields during reheating | 33 pages, no figures. Improvements in the text. Some calculations
sent to appendices. Accepted for publication in JCAP | null | 10.1088/1475-7516/2015/03/045 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the evolution of electromagnetic fields coupled to conduction
currents during the reheating era after inflation, and prior to the
establishing of the proton-electron plasma. We assume that the currents may be
described by second order causal hydrodynamics. The resulting theory is not
conformally invariant... | [
{
"created": "Tue, 13 Jan 2015 16:02:02 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Mar 2015 13:14:14 GMT",
"version": "v2"
}
] | 2015-06-23 | [
[
"Calzetta",
"Esteban",
""
],
[
"Kandus",
"Alejandra",
""
]
] | We consider the evolution of electromagnetic fields coupled to conduction currents during the reheating era after inflation, and prior to the establishing of the proton-electron plasma. We assume that the currents may be described by second order causal hydrodynamics. The resulting theory is not conformally invariant. ... |
2109.06456 | P Ajith | S. Basak, A. Ganguly, K. Haris, S. Kapadia, A. K. Mehta, P. Ajith | Constraints on compact dark matter from gravitational wave microlensing | 9 pages, 12 figures, published version | ApJ Lett. 926 L28 (2022) | 10.3847/2041-8213/ac4dfa | LIGO-P2100321 | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by-nc-nd/4.0/ | If a significant fraction of dark matter is in the form of compact objects,
they will cause microlensing effects in the gravitational wave (GW) signals
observable by LIGO and Virgo. From the non-observation of microlensing
signatures in the binary black hole events from the first two observing runs
and the first half... | [
{
"created": "Tue, 14 Sep 2021 05:52:55 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Feb 2022 04:17:52 GMT",
"version": "v2"
}
] | 2022-02-24 | [
[
"Basak",
"S.",
""
],
[
"Ganguly",
"A.",
""
],
[
"Haris",
"K.",
""
],
[
"Kapadia",
"S.",
""
],
[
"Mehta",
"A. K.",
""
],
[
"Ajith",
"P.",
""
]
] | If a significant fraction of dark matter is in the form of compact objects, they will cause microlensing effects in the gravitational wave (GW) signals observable by LIGO and Virgo. From the non-observation of microlensing signatures in the binary black hole events from the first two observing runs and the first half o... |
1707.00955 | Donato Bini | Donato Bini, Andrea Geralico, Robert T. Jantzen | Position determination and strong field parallax effects for photon
emitters in the Schwarzschild spacetime | 21 pages, 5 figures, GRG macros | null | 10.1007/s10714-017-2318-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Position determination of photon emitters and associated strong field
parallax effects are investigated using relativistic optics when the photon
orbits are confined to the equatorial plane of the Schwarzschild spacetime. We
assume the emitter is at a fixed space position and the receiver moves along a
circular geode... | [
{
"created": "Tue, 4 Jul 2017 13:03:38 GMT",
"version": "v1"
}
] | 2017-11-29 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Jantzen",
"Robert T.",
""
]
] | Position determination of photon emitters and associated strong field parallax effects are investigated using relativistic optics when the photon orbits are confined to the equatorial plane of the Schwarzschild spacetime. We assume the emitter is at a fixed space position and the receiver moves along a circular geodesi... |
2005.07554 | Cosimo Bambi | Carlos A. Benavides-Gallego, Ahmadjon Abdujabbarov, Daniele
Malafarina, Cosimo Bambi | Quasi-harmonic oscillations of charged particles in static axially
symmetric space-times immersed in a uniform magnetic field | 19 pages, 10 figures. v2: fixed some typos | Phys. Rev. D 101, 124024 (2020) | 10.1103/PhysRevD.101.124024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In continuation of our previous study [Phys. Rev. D 99 (2019) 4, 044012], we
investigate the motion of charged particles in the $\gamma$-metric. We provide
some examples of curled trajectories in the equatorial plane and escape
trajectories outside the equatorial plane. Finally, we consider harmonic
oscillations due ... | [
{
"created": "Fri, 15 May 2020 14:07:05 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Jun 2020 17:55:17 GMT",
"version": "v2"
}
] | 2020-06-15 | [
[
"Benavides-Gallego",
"Carlos A.",
""
],
[
"Abdujabbarov",
"Ahmadjon",
""
],
[
"Malafarina",
"Daniele",
""
],
[
"Bambi",
"Cosimo",
""
]
] | In continuation of our previous study [Phys. Rev. D 99 (2019) 4, 044012], we investigate the motion of charged particles in the $\gamma$-metric. We provide some examples of curled trajectories in the equatorial plane and escape trajectories outside the equatorial plane. Finally, we consider harmonic oscillations due to... |
2302.07001 | Tatevik Vardanyan | Tatevik Vardanyan, Claus Kiefer | Quantum-gravitational corrections to the power spectrum for a closed
universe | 7 pages, 1 figure. Contribution to the Proceedings of the DICE2022
meeting, Castiglioncello, September 2022 | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the quantum-gravitational corrections to the power spectrum of a
gauge-invariant inflationary scalar perturbations in a closed model of a
universe. We consider canonical quantum gravity as an approach to quantizing
gravity. This leads to the Wheeler-DeWitt equation, which has been studied by
applying a semic... | [
{
"created": "Tue, 14 Feb 2023 12:15:08 GMT",
"version": "v1"
}
] | 2023-02-15 | [
[
"Vardanyan",
"Tatevik",
""
],
[
"Kiefer",
"Claus",
""
]
] | We study the quantum-gravitational corrections to the power spectrum of a gauge-invariant inflationary scalar perturbations in a closed model of a universe. We consider canonical quantum gravity as an approach to quantizing gravity. This leads to the Wheeler-DeWitt equation, which has been studied by applying a semicla... |
gr-qc/9802039 | Nese Ozdemir | Y. Enginer, M. Hortacsu and N. Ozdemir | Quantum Fluctuations for Gravitational Impulsive Waves | Submitted to Int. J. Mod. Phys. A | Int.J.Mod.Phys.A13:1201-1212,1998 | 10.1142/S0217751X9800055X | null | gr-qc | null | Quantum fluctuations for a massless scalar field in the background metric of
spherical impulsive gravitational waves through Minkowski and de Sitter spaces
are investigated. It is shown that there exist finite fluctuations for de
Sitter space.
| [
{
"created": "Tue, 17 Feb 1998 07:44:55 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Enginer",
"Y.",
""
],
[
"Hortacsu",
"M.",
""
],
[
"Ozdemir",
"N.",
""
]
] | Quantum fluctuations for a massless scalar field in the background metric of spherical impulsive gravitational waves through Minkowski and de Sitter spaces are investigated. It is shown that there exist finite fluctuations for de Sitter space. |
2307.10801 | Dmitriy Ovchinnikov | R. A. Konoplya, D. Ovchinnikov, B. Ahmedov | Bardeen spacetime as a quantum corrected Schwarzschild black hole:
Quasinormal modes and Hawking radiation | 12 pages, 9 figures | null | null | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | The Bardeen black hole holds historical significance as the first model of a
regular black hole. Recently, there have been proposed interpretations of the
Bardeen spacetime as quantum corrections to the Schwarzschild solution. Our
study focuses on investigating the quasinormal modes and Hawking radiation of
the Barde... | [
{
"created": "Thu, 20 Jul 2023 12:09:19 GMT",
"version": "v1"
}
] | 2023-07-21 | [
[
"Konoplya",
"R. A.",
""
],
[
"Ovchinnikov",
"D.",
""
],
[
"Ahmedov",
"B.",
""
]
] | The Bardeen black hole holds historical significance as the first model of a regular black hole. Recently, there have been proposed interpretations of the Bardeen spacetime as quantum corrections to the Schwarzschild solution. Our study focuses on investigating the quasinormal modes and Hawking radiation of the Bardeen... |
2208.02084 | Oleg Tsupko | Oleg Yu. Tsupko | Shape of higher-order images of equatorial emission rings around a
Schwarzschild black hole: Analytical description with polar curves | See also our previous paper arXiv:2201.01716 | Phys. Rev. D 106, 064033 (2022) | 10.1103/PhysRevD.106.064033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Higher-order photon rings can be expected to be detected in a more detailed
image of the black hole found in future observations. These rings are lensed
images of the luminous matter surrounding the black hole and are formed by
photons that loop around it. In this paper we have succeeded to derive an
analytical expre... | [
{
"created": "Wed, 3 Aug 2022 14:09:06 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Sep 2022 00:32:15 GMT",
"version": "v2"
}
] | 2022-09-20 | [
[
"Tsupko",
"Oleg Yu.",
""
]
] | Higher-order photon rings can be expected to be detected in a more detailed image of the black hole found in future observations. These rings are lensed images of the luminous matter surrounding the black hole and are formed by photons that loop around it. In this paper we have succeeded to derive an analytical express... |
gr-qc/9603033 | G. Rein | Gerhard Rein (Dept. of Mathematics, Univ. of Munich) | Nonlinear stability of homogeneous models in Newtonian cosmology | 19 pages, latex | Arch.Ration.Mech.Anal. 140 (1997) 335-351 | 10.1007/s002050050070 | null | gr-qc math-ph math.MP | null | We consider the Vlasov-Poisson system in a cosmological setting and prove
nonlinear stability of homogeneous solutions against small, spatially periodic
perturbations in the sup-norm of the spatial mass density. This result is
connected with the question of how large scale structures such as galaxies have
evolved out... | [
{
"created": "Thu, 21 Mar 1996 13:49:48 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Rein",
"Gerhard",
"",
"Dept. of Mathematics, Univ. of Munich"
]
] | We consider the Vlasov-Poisson system in a cosmological setting and prove nonlinear stability of homogeneous solutions against small, spatially periodic perturbations in the sup-norm of the spatial mass density. This result is connected with the question of how large scale structures such as galaxies have evolved out o... |
gr-qc/0701045 | Farrukh Fattoyev Jabborovich | B.J. Ahmedov | General relativistic galvano-gravitomagnetic effect in current carrying
conductors | 10 pages | Physics Letters A 256 (1999) 9-14 | 10.1016/S0375-9601(99)00182-6 | null | gr-qc astro-ph | null | The analogy between general relativity and electromagnetism suggests that
there is a galvano-gravitomagnetic effect, which is the gravitational analog of
the Hall effect. This new effect takes place when a current carrying conductor
is placed in a gravitomagnetic field and the conduction electrons moving inside
the c... | [
{
"created": "Sun, 7 Jan 2007 11:30:13 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Ahmedov",
"B. J.",
""
]
] | The analogy between general relativity and electromagnetism suggests that there is a galvano-gravitomagnetic effect, which is the gravitational analog of the Hall effect. This new effect takes place when a current carrying conductor is placed in a gravitomagnetic field and the conduction electrons moving inside the con... |
1710.10845 | Alessia Platania | Alfio Bonanno and Benjamin Koch and Alessia Platania | Gravitational collapse in Quantum Einstein Gravity | 13 pages, 5 figures | null | 10.1007/s10701-018-0195-7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of spacetime singularities is one of the biggest problems of
nowadays physics. According to Penrose, each physical singularity should be
covered by a "cosmic censor" which prevents any external observer from
perceiving their existence. However, classical models describing the
gravitational collapse usua... | [
{
"created": "Mon, 30 Oct 2017 10:14:54 GMT",
"version": "v1"
}
] | 2018-08-15 | [
[
"Bonanno",
"Alfio",
""
],
[
"Koch",
"Benjamin",
""
],
[
"Platania",
"Alessia",
""
]
] | The existence of spacetime singularities is one of the biggest problems of nowadays physics. According to Penrose, each physical singularity should be covered by a "cosmic censor" which prevents any external observer from perceiving their existence. However, classical models describing the gravitational collapse usuall... |
1910.04758 | Gianmassimo Tasinato | Cari Powell, Gianmassimo Tasinato | Probing a stationary non-Gaussian background of stochastic gravitational
waves with pulsar timing arrays | 25 pages,13 figures | null | 10.1088/1475-7516/2020/01/017 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce the concept of stationary graviton non-Gaussianity (nG), an
observable that can be probed in terms of 3-point correlation functions of a
stochastic gravitational wave (GW) background. When evaluated in momentum
space, stationary nG corresponds to folded bispectra of graviton nG. We
determine 3-point over... | [
{
"created": "Thu, 10 Oct 2019 12:27:30 GMT",
"version": "v1"
}
] | 2020-01-15 | [
[
"Powell",
"Cari",
""
],
[
"Tasinato",
"Gianmassimo",
""
]
] | We introduce the concept of stationary graviton non-Gaussianity (nG), an observable that can be probed in terms of 3-point correlation functions of a stochastic gravitational wave (GW) background. When evaluated in momentum space, stationary nG corresponds to folded bispectra of graviton nG. We determine 3-point overla... |
2212.07975 | Oscar Castillo Felisola Dr. | Jos\'e Perdiguero and Oscar Castillo-Felisola | Polynomial affine gravity in 3+1 dimensions | Submitted to the memoirs of the XXIII Chilean Physics Symposium, held
in Valparaiso - Chile, 22-24 novembre 2022. 3 pages | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by-sa/4.0/ | The polynomial affine gravity is an alternative model of gravity whose
fundamental field is the affine connection, and it is invariant under the
complete group of diffeomorphisms. In 3+1 dimensions the field equations
generalise those of Einstein--Hilbert, the coupling constants are
dimensionless, the action has a fi... | [
{
"created": "Thu, 15 Dec 2022 17:15:17 GMT",
"version": "v1"
}
] | 2022-12-16 | [
[
"Perdiguero",
"José",
""
],
[
"Castillo-Felisola",
"Oscar",
""
]
] | The polynomial affine gravity is an alternative model of gravity whose fundamental field is the affine connection, and it is invariant under the complete group of diffeomorphisms. In 3+1 dimensions the field equations generalise those of Einstein--Hilbert, the coupling constants are dimensionless, the action has a fini... |
gr-qc/9805041 | Brien C. Nolan | Brien C. Nolan | A point mass in an isotropic universe. Existence, uniqueness and basic
properties | 20 pages, to appear in Phys. Rev. D | Phys.Rev. D58 (1998) 064006 | 10.1103/PhysRevD.58.064006 | null | gr-qc | null | Criteria which a space-time must satisfy to represent a point mass embedded
in an open Robertson--Walker (RW) universe are given. It is shown that
McVittie's solution in the case $k=0$ satisfies these criteria, but does not in
the case $k=-1$. Existence of a solution for the case $k=-1$ is proven and its
representati... | [
{
"created": "Tue, 12 May 1998 08:04:35 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Nolan",
"Brien C.",
""
]
] | Criteria which a space-time must satisfy to represent a point mass embedded in an open Robertson--Walker (RW) universe are given. It is shown that McVittie's solution in the case $k=0$ satisfies these criteria, but does not in the case $k=-1$. Existence of a solution for the case $k=-1$ is proven and its representation... |
gr-qc/0405106 | Tsutomu Tashiro | Michiyoshi Saito, Hujio Noda, Tsutomu Tashiro | Structure of Extended Loop Wave Function in Quantum Gravity and Operator
Formalism | 20 pages including 2 tables | Int.J.Mod.Phys. A20 (2005) 907-922 | 10.1142/S0217751X05019993 | null | gr-qc | null | The structure of extended loop wave function is investigated in terms of the
operator formalism. It is found that the extended loop wave function is
characterized by the family number and classified by the partition of the
family number. It is pointed out that the constraints to the extended loop
function in quantum ... | [
{
"created": "Wed, 19 May 2004 11:52:49 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Saito",
"Michiyoshi",
""
],
[
"Noda",
"Hujio",
""
],
[
"Tashiro",
"Tsutomu",
""
]
] | The structure of extended loop wave function is investigated in terms of the operator formalism. It is found that the extended loop wave function is characterized by the family number and classified by the partition of the family number. It is pointed out that the constraints to the extended loop function in quantum gr... |
2408.01476 | Gamal G.L. Nashed | G.G.L. Nashed | Charged solution with equal metric ansatz in Gauss-Bonnet theory coupled
to scalar field | 18 pages, 4 figures | Phys.Dark Univ. 41 (2023) 101260 | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In the course of this research, we employ the Gauss-Bonnet equation of motion
alongside the scalar field and potential to acquire a fresh solution for a
spherically symmetrical charged black hole. Specifically, we derive this black
hole solution by employing a metric potential where the components are equal,
that is,... | [
{
"created": "Fri, 2 Aug 2024 08:59:31 GMT",
"version": "v1"
}
] | 2024-08-06 | [
[
"Nashed",
"G. G. L.",
""
]
] | In the course of this research, we employ the Gauss-Bonnet equation of motion alongside the scalar field and potential to acquire a fresh solution for a spherically symmetrical charged black hole. Specifically, we derive this black hole solution by employing a metric potential where the components are equal, that is, $... |
2303.17630 | Shahar Hod | Shahar Hod | What can a detected photon with a given gravitational redshift tell us
about the maximum density of a compact star? | 5 pages | Physical Review D 107, 064063 (2023) | 10.1103/PhysRevD.107.064063 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Far away observers can in principle bound from below the dimensionless
maximum-density parameter $\Lambda\equiv4\pi R^2\rho_{\text{max}}$ of a compact
star by measuring the gravitational redshift factor
$z\equiv\nu_{\text{e}}/\nu_{\infty}-1$ of photons that were emitted from the
{\it surface} of the star: $\Lambda\ge... | [
{
"created": "Thu, 30 Mar 2023 18:00:02 GMT",
"version": "v1"
}
] | 2023-04-05 | [
[
"Hod",
"Shahar",
""
]
] | Far away observers can in principle bound from below the dimensionless maximum-density parameter $\Lambda\equiv4\pi R^2\rho_{\text{max}}$ of a compact star by measuring the gravitational redshift factor $z\equiv\nu_{\text{e}}/\nu_{\infty}-1$ of photons that were emitted from the {\it surface} of the star: $\Lambda\geq{... |
1406.4898 | Igor Pe\~na | Sujoy K. Modak, Leonardo Ort\'iz, Igor Pe\~na, Daniel Sudarsky | Black Holes: Information Loss But No Paradox | 39 pages, 6 figures. Matches accepted version in General Relativity
and Gravitation | Gen Relativ Gravit (2015) 47:120 | 10.1007/s10714-015-1960-y | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The process of black hole evaporation resulting from the Hawking effect has
generated an intense controversy regarding its potential conflict with quantum
mechanics' unitary evolution. In a recent couple of works of a collaboration
involving one of us, we have revised the controversy with the aims of, on the
one hand... | [
{
"created": "Wed, 18 Jun 2014 21:47:52 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Aug 2014 20:50:00 GMT",
"version": "v2"
},
{
"created": "Wed, 30 Sep 2015 04:16:09 GMT",
"version": "v3"
}
] | 2015-10-01 | [
[
"Modak",
"Sujoy K.",
""
],
[
"Ortíz",
"Leonardo",
""
],
[
"Peña",
"Igor",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | The process of black hole evaporation resulting from the Hawking effect has generated an intense controversy regarding its potential conflict with quantum mechanics' unitary evolution. In a recent couple of works of a collaboration involving one of us, we have revised the controversy with the aims of, on the one hand, ... |
0912.4074 | Roberto A. Sussman | Roberto A. Sussman | Quasi-local variables and scalar averaging in LTB dust models | Submitted contribution for the proceedings of the "Invisible Universe
Internationale Confernce", Palais de L'UNESCO, Paris, France, June 29-July 3,
2009. Jean-Michel ALIMI, editor. 10 pages, 2 figures. AIP macros: layoutstyle
8x11single | AIP Conf.Proc.1241:1146-1155,2010 | 10.1063/1.3462612 | null | gr-qc astro-ph.CO math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce quasi--local (QL) scalar variables in spherically symmetric LTB
models. If the QL scalars are defined as functionals, they become weighed
averages that generalize the standard proper volume averages on space slices
orthogonal to the 4-velocity. We examine the connection between QL functions
and functiona... | [
{
"created": "Mon, 21 Dec 2009 03:39:21 GMT",
"version": "v1"
}
] | 2011-01-28 | [
[
"Sussman",
"Roberto A.",
""
]
] | We introduce quasi--local (QL) scalar variables in spherically symmetric LTB models. If the QL scalars are defined as functionals, they become weighed averages that generalize the standard proper volume averages on space slices orthogonal to the 4-velocity. We examine the connection between QL functions and functionals... |
0808.1223 | Brendan Foster | Julian Barbour, Brendan Z. Foster | Constraints and gauge transformations: Dirac's theorem is not always
valid | 14 pages | null | null | ITP-UU-08/46, SPIN-08/36 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A standard tenet of canonical quantum gravity is that evolution generated by
a Hamiltonian constraint is just a gauge transformation on the phase space and
therefore does not change the physical state. The basis for this belief is a
theorem of Dirac that identifies primary first-class constraints as generators
of phy... | [
{
"created": "Fri, 8 Aug 2008 14:33:00 GMT",
"version": "v1"
}
] | 2008-08-12 | [
[
"Barbour",
"Julian",
""
],
[
"Foster",
"Brendan Z.",
""
]
] | A standard tenet of canonical quantum gravity is that evolution generated by a Hamiltonian constraint is just a gauge transformation on the phase space and therefore does not change the physical state. The basis for this belief is a theorem of Dirac that identifies primary first-class constraints as generators of physi... |
1912.09461 | Barry Wardell | Sarp Akcay, Sam R. Dolan, Chris Kavanagh, Jordan Moxon, Niels
Warburton, Barry Wardell | Dissipation in extreme-mass ratio binaries with a spinning secondary | Minor typos corrected | Phys. Rev. D 102, 064013 (2020) | 10.1103/PhysRevD.102.064013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the gravitational-wave flux balance law in an extreme mass-ratio
binary with a spinning secondary. This law relates the flux of energy (angular
momentum) radiated to null infinity and through the event horizon to the local
change in the secondary's orbital energy (angular momentum) for generic
(non-resonan... | [
{
"created": "Thu, 19 Dec 2019 18:47:11 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Feb 2020 22:46:53 GMT",
"version": "v2"
}
] | 2020-09-16 | [
[
"Akcay",
"Sarp",
""
],
[
"Dolan",
"Sam R.",
""
],
[
"Kavanagh",
"Chris",
""
],
[
"Moxon",
"Jordan",
""
],
[
"Warburton",
"Niels",
""
],
[
"Wardell",
"Barry",
""
]
] | We present the gravitational-wave flux balance law in an extreme mass-ratio binary with a spinning secondary. This law relates the flux of energy (angular momentum) radiated to null infinity and through the event horizon to the local change in the secondary's orbital energy (angular momentum) for generic (non-resonant)... |
gr-qc/0011057 | Doc. Ing. Jozef Sima DRSc. | Jozef Sima and Miroslav Sukenik | Localization of gravitational energy and its potential to evaluation of
hydrogen atom properties | 8 pages, Latex | null | null | SS-00-06 | gr-qc | null | Vaidya metric as an integral part of the Expansive Nondecelerative Universe
(ENU) model enables to localize the energy of gravitational field and,
subsequently, to find a deep interrelationship between quantum mechanics and
the general theory of relativity. In the present paper, stemming from the ENU
model, ionisatio... | [
{
"created": "Thu, 16 Nov 2000 12:53:50 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sima",
"Jozef",
""
],
[
"Sukenik",
"Miroslav",
""
]
] | Vaidya metric as an integral part of the Expansive Nondecelerative Universe (ENU) model enables to localize the energy of gravitational field and, subsequently, to find a deep interrelationship between quantum mechanics and the general theory of relativity. In the present paper, stemming from the ENU model, ionisation ... |
1702.06823 | Ali \"Ovg\"un Dr. | Ali \"Ovg\"un and Ines G. Salako | Thin-Shell Wormholes in Neo-Newtonian Theory | 12 pages, 4 figures. accepted for publication in Mod.Phys.Lett. A | Modern Physics Letters A, Vol. 32 (2017) 1750119 | 10.1142/S021773231750119X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we constructed an acoustic thin-shell wormhole (ATW) under
neo-Newtonian theory using the Darmois-Israel junction conditions. To determine
the stability of the ATW by applying the cut-and-paste method, we found the
surface density and surface pressure of the ATW under neo-Newtonian
hydrodynamics just a... | [
{
"created": "Mon, 20 Feb 2017 09:53:03 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Jun 2017 03:18:38 GMT",
"version": "v2"
}
] | 2017-07-04 | [
[
"Övgün",
"Ali",
""
],
[
"Salako",
"Ines G.",
""
]
] | In this paper, we constructed an acoustic thin-shell wormhole (ATW) under neo-Newtonian theory using the Darmois-Israel junction conditions. To determine the stability of the ATW by applying the cut-and-paste method, we found the surface density and surface pressure of the ATW under neo-Newtonian hydrodynamics just aft... |
1810.03290 | Parthapratim Pradhan | Parthapratim Pradhan | Study of energy extraction and epicyclic frequencies in
Kerr-MOG~(Modified Gravity) black hole | Accepted in EPJC | Eur. Phys. J. C (2019) 79: 401 | 10.1140/epjc/s10052-019-6907-0 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the energy extraction by the Penrose process in Kerr-MOG black
hole~(BH). We derive the gain in energy for Kerr-MOG as \begin{eqnarray} \Delta
{\cal E} \leq
\frac{1}{2}\left(\sqrt{\frac{2}{1+\sqrt{\frac{1}{1+\alpha}-\left(\frac{a}{{\cal
M}}\right)^2}} -\frac{\alpha}{1+\alpha}
\frac{1}{\left(1+\sqrt{\fr... | [
{
"created": "Mon, 8 Oct 2018 07:24:04 GMT",
"version": "v1"
},
{
"created": "Fri, 17 May 2019 17:32:07 GMT",
"version": "v2"
}
] | 2019-05-20 | [
[
"Pradhan",
"Parthapratim",
""
]
] | We investigate the energy extraction by the Penrose process in Kerr-MOG black hole~(BH). We derive the gain in energy for Kerr-MOG as \begin{eqnarray} \Delta {\cal E} \leq \frac{1}{2}\left(\sqrt{\frac{2}{1+\sqrt{\frac{1}{1+\alpha}-\left(\frac{a}{{\cal M}}\right)^2}} -\frac{\alpha}{1+\alpha} \frac{1}{\left(1+\sqrt{\frac... |
1406.3232 | Jiri Podolsky | Jiri Podolsky, Robert Svarc | Algebraic structure of Robinson-Trautman and Kundt geometries in
arbitrary dimension | 25 pages, no figures | Class.Quant.Grav.32:015001,2015 | 10.1088/0264-9381/32/1/015001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the Weyl tensor algebraic structure of a fully general family
of D-dimensional geometries that admit a non-twisting and shear-free null
vector field k. From the coordinate components of the curvature tensor we
explicitly derive all Weyl scalars of various boost weights. This enables us to
give a comple... | [
{
"created": "Thu, 12 Jun 2014 13:22:25 GMT",
"version": "v1"
}
] | 2015-01-05 | [
[
"Podolsky",
"Jiri",
""
],
[
"Svarc",
"Robert",
""
]
] | We investigate the Weyl tensor algebraic structure of a fully general family of D-dimensional geometries that admit a non-twisting and shear-free null vector field k. From the coordinate components of the curvature tensor we explicitly derive all Weyl scalars of various boost weights. This enables us to give a complete... |
2401.03594 | Gustavo Alejandro Sanchez Herrera | H\'ector Hugo Hern\'andez Hern\'andez and Gustavo Alejandro S\'anchez
Herrera | Singularity removal in a quantum effective evolution of the Mixmaster
cosmological model | 14 pages, 10 figures | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | In this work we analyze the evolution of the quantum Mixmaster cosmological
model within an effective approach. In particular, we study the behaviour of
the scale factor and anisotropies of the theory, and determine how it deviates
from its classical counterpart due to quantum back-reaction. Remarkably, we
determine ... | [
{
"created": "Sun, 7 Jan 2024 22:27:09 GMT",
"version": "v1"
}
] | 2024-01-09 | [
[
"Hernández",
"Héctor Hugo Hernández",
""
],
[
"Herrera",
"Gustavo Alejandro Sánchez",
""
]
] | In this work we analyze the evolution of the quantum Mixmaster cosmological model within an effective approach. In particular, we study the behaviour of the scale factor and anisotropies of the theory, and determine how it deviates from its classical counterpart due to quantum back-reaction. Remarkably, we determine th... |
2308.07098 | Alvaro P. Raposo | Juan J. Morales-Ruiz and \'Alvaro P. Raposo | A note on the geodesic deviation equation for null geodesics in the
Schwarzschild black-hole | 12 pages | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We use the Hamiltonian formulation of the geodesic equation in the
Schwarzschild space-time so as to get the variational equation as the
counterpart of the Jacobi equation in this approach. In this context we are
able to apply the Morales-Ramis theorem to link the integrability of the
geodesic equation to the integra... | [
{
"created": "Mon, 14 Aug 2023 12:20:03 GMT",
"version": "v1"
}
] | 2023-08-15 | [
[
"Morales-Ruiz",
"Juan J.",
""
],
[
"Raposo",
"Álvaro P.",
""
]
] | We use the Hamiltonian formulation of the geodesic equation in the Schwarzschild space-time so as to get the variational equation as the counterpart of the Jacobi equation in this approach. In this context we are able to apply the Morales-Ramis theorem to link the integrability of the geodesic equation to the integrabi... |
gr-qc/0101091 | Tomas Ledvinka | Jiri Bicak | Black Holes under External Influence | based on the plenary talk given at ICGC 2000, Kharagpur, India, 16
pages, 4 figures | Pramana 55:481-496,2000 | 10.1007/s12043-000-0161-7 | null | gr-qc | null | The work on black holes immersed in external fields is reviewed in both
test-field approximation and within exact solutions. In particular we pay
attention to the effect of the expulsion of the flux of external fields across
charged and rotating black holes which are approaching extremal states.
Recently this effect ... | [
{
"created": "Tue, 23 Jan 2001 19:55:30 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Bicak",
"Jiri",
""
]
] | The work on black holes immersed in external fields is reviewed in both test-field approximation and within exact solutions. In particular we pay attention to the effect of the expulsion of the flux of external fields across charged and rotating black holes which are approaching extremal states. Recently this effect ha... |
1706.03767 | Bivudutta Mishra Dr. | B.Mishra, Sankarsan Tarai, S.K. Tripathy | Dynamical features of an anisotropic cosmological model | 11 pages, 7 figures | Indian Journal of Physics, 92(9):1199, 2018 | 10.1007/s12648-018-1194-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamical features of Bianchi type $VI_h$ $(BVI_h)$ universe are
investigated in $f(R,T)$ theory of gravity. The field equations and the
physical properties of the model are derived considering a power law expansion
of the universe. The effect of anisotropy on the dynamics of the universe as
well on the energy co... | [
{
"created": "Sat, 10 Jun 2017 06:27:31 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Jan 2018 14:32:30 GMT",
"version": "v2"
}
] | 2018-08-09 | [
[
"Mishra",
"B.",
""
],
[
"Tarai",
"Sankarsan",
""
],
[
"Tripathy",
"S. K.",
""
]
] | The dynamical features of Bianchi type $VI_h$ $(BVI_h)$ universe are investigated in $f(R,T)$ theory of gravity. The field equations and the physical properties of the model are derived considering a power law expansion of the universe. The effect of anisotropy on the dynamics of the universe as well on the energy cond... |
gr-qc/9412042 | null | A. Carlini, D.H. Coule and D.M. Solomons | Quantum versions of Carlini-Miji\'c wormholes | wrong NORDITA preprint reference number changed | null | null | NORDITA-94/75 A | gr-qc hep-th | null | We consider the quantum analogues of wormholes obtained by Carlini and
Miji\'c (CM), who analytically continued closed universe models. To obtain
wormholes when the strong energy condition ($\gamma>2/3$) is satisfied, we are
able to simplify the Wheeler-DeWitt (WDW) equation by using an equivalent
scalar potential wh... | [
{
"created": "Thu, 15 Dec 1994 15:55:57 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Dec 1994 08:28:56 GMT",
"version": "v2"
},
{
"created": "Thu, 12 Jan 1995 14:27:33 GMT",
"version": "v3"
}
] | 2009-09-25 | [
[
"Carlini",
"A.",
""
],
[
"Coule",
"D. H.",
""
],
[
"Solomons",
"D. M.",
""
]
] | We consider the quantum analogues of wormholes obtained by Carlini and Miji\'c (CM), who analytically continued closed universe models. To obtain wormholes when the strong energy condition ($\gamma>2/3$) is satisfied, we are able to simplify the Wheeler-DeWitt (WDW) equation by using an equivalent scalar potential whic... |
2309.00431 | Erik Amorim | \'Erik Amorim, H{\aa}kan Andr\'easson, Markus Kunze | Proof of the Einstein quadrupole formula for solutions of the
Einstein-Vlasov system close to Minkowski spacetime | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We rigorously derive the quadrupole formula within the context of the
Einstein-Vlasov system. The main contribution of this work is an estimate of
the remainder terms, derived from well-defined assumptions, with explicitly
stated error terms that depend on the solution's boundedness and decay
properties, and the dist... | [
{
"created": "Fri, 1 Sep 2023 12:52:20 GMT",
"version": "v1"
}
] | 2023-09-04 | [
[
"Amorim",
"Érik",
""
],
[
"Andréasson",
"Håkan",
""
],
[
"Kunze",
"Markus",
""
]
] | We rigorously derive the quadrupole formula within the context of the Einstein-Vlasov system. The main contribution of this work is an estimate of the remainder terms, derived from well-defined assumptions, with explicitly stated error terms that depend on the solution's boundedness and decay properties, and the distan... |
0708.3852 | Eduardo V. Correa Silva | G. Oliveira Neto, E.V. Correa Silva, N.A. Lemos, G.A. Monerat | Probing singularities in quantum cosmology with curvature scalars | 9 pages, 6 figures | Phys.Lett.A373:2012-2016,2009 | 10.1016/j.physleta.2009.04.002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide further evidence that the canonical quantization of cosmological
models eliminates the classical Big Bang singularity, using the {\it
DeBroglie-Bohm} interpretation of quantum mechanics. The usual criterion for
absence of the Big Bang singularity in Friedmann-Robertson-Walker quantum
cosmological models is... | [
{
"created": "Tue, 28 Aug 2007 20:13:48 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Mar 2010 01:54:21 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Neto",
"G. Oliveira",
""
],
[
"Silva",
"E. V. Correa",
""
],
[
"Lemos",
"N. A.",
""
],
[
"Monerat",
"G. A.",
""
]
] | We provide further evidence that the canonical quantization of cosmological models eliminates the classical Big Bang singularity, using the {\it DeBroglie-Bohm} interpretation of quantum mechanics. The usual criterion for absence of the Big Bang singularity in Friedmann-Robertson-Walker quantum cosmological models is t... |
1510.06012 | P. A. Gonzalez | Ramon Becar, P. A. Gonzalez and Yerko Vasquez | Quasinormal modes of Four Dimensional Topological Nonlinear Charged
Lifshitz Black Holes | 13 pages, 2 figures and 6 Tables. arXiv admin note: text overlap with
arXiv:1404.3172, arXiv:1510.04605 | null | 10.1140/epjc/s10052-016-3937-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study scalar perturbations of four dimensional topological nonlinear
charged Lifshitz black holes with spherical and plane transverse sections, and
we find numerically the quasinormal modes for scalar fields. Then, we study the
stability of these black holes under massive and massless scalar field
perturbations. W... | [
{
"created": "Tue, 20 Oct 2015 19:15:35 GMT",
"version": "v1"
}
] | 2016-03-23 | [
[
"Becar",
"Ramon",
""
],
[
"Gonzalez",
"P. A.",
""
],
[
"Vasquez",
"Yerko",
""
]
] | We study scalar perturbations of four dimensional topological nonlinear charged Lifshitz black holes with spherical and plane transverse sections, and we find numerically the quasinormal modes for scalar fields. Then, we study the stability of these black holes under massive and massless scalar field perturbations. We ... |
gr-qc/0504025 | Emil M. Prodanov | Rossen I. Ivanov and Emil M. Prodanov | Pseudo-Newtonian Potential for Charged Particle in Kerr-Newman Geometry | 8 pages | Phys.Lett. B611 (2005) 34-38 | 10.1016/j.physletb.2005.02.047 | null | gr-qc | null | We consider the equatorial circular motion of a test particle of specific
charge q/m << 1 in the Kerr-Newman geometry of a rotating charged black hole.
We find the particle's conserved energy and conserved projection of the angular
momentum on the black hole's axis of rotation as corrections, in leading order
of q/m,... | [
{
"created": "Wed, 6 Apr 2005 22:07:31 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Ivanov",
"Rossen I.",
""
],
[
"Prodanov",
"Emil M.",
""
]
] | We consider the equatorial circular motion of a test particle of specific charge q/m << 1 in the Kerr-Newman geometry of a rotating charged black hole. We find the particle's conserved energy and conserved projection of the angular momentum on the black hole's axis of rotation as corrections, in leading order of q/m, t... |
gr-qc/0403042 | Piotr T. Chru\'sciel | R. Beig, P.T. Chrusciel, R. Schoen | KIDs are non-generic | latex2e, 38 pages in A4 now, minor corrections throughout | Annales Henri Poincare 6 (2005) 155-194 | 10.1007/s00023-005-0202-3 | ESI preprint 1464 | gr-qc | null | We prove that generic solutions of the vacuum constraint Einstein equations
do not possess any global or local space-time Killing vectors, on an
asymptotically flat Cauchy surface, or on a compact Cauchy surface with mean
curvature close to a constant, or for CMC asymptotically hyperbolic initial
data sets. More gene... | [
{
"created": "Wed, 10 Mar 2004 20:51:18 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Oct 2004 07:25:20 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Beig",
"R.",
""
],
[
"Chrusciel",
"P. T.",
""
],
[
"Schoen",
"R.",
""
]
] | We prove that generic solutions of the vacuum constraint Einstein equations do not possess any global or local space-time Killing vectors, on an asymptotically flat Cauchy surface, or on a compact Cauchy surface with mean curvature close to a constant, or for CMC asymptotically hyperbolic initial data sets. More genera... |
gr-qc/9602036 | Donald Marolf | Donald Marolf | Interpolating Between Topologies: Casimir Energies | 7 pages Revtex, Note and reference added | Phys.Lett. B392 (1997) 287-290 | 10.1016/S0370-2693(96)01577-8 | UCSBTH-96-03 | gr-qc hep-th | null | A set of models is considered which, in a certain sense, interpolates between
1+1 free quantum field theories on topologically distinct backgrounds. The
intermediate models may be termed free quantum field theories, though they are
certainly not local. Their ground state energies are computed and shown to be
finite. ... | [
{
"created": "Sun, 18 Feb 1996 01:09:41 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Feb 1996 01:58:33 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Mar 1997 02:05:47 GMT",
"version": "v3"
}
] | 2009-10-28 | [
[
"Marolf",
"Donald",
""
]
] | A set of models is considered which, in a certain sense, interpolates between 1+1 free quantum field theories on topologically distinct backgrounds. The intermediate models may be termed free quantum field theories, though they are certainly not local. Their ground state energies are computed and shown to be finite. Th... |
gr-qc/0605152 | Vh Satheeshkumar | V. H. Satheeshkumar and P. K. Suresh | Understanding Gravity: Some Extra Dimensional Perspectives | 21 pages | ISRN Astronomy and Astrophysics, Volume 2011 (2011), Article ID
131473 | 10.5402/2011/131473 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | Gravity is one of the most inexplicable forces of nature, controlling
everything, from the expansion of the Universe to the ebb and flow of ocean
tides. The search for the laws of motion and gravitation began more than two
thousand years ago but still we do not have the complete picture of it. In this
article, we hav... | [
{
"created": "Wed, 31 May 2006 18:19:15 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Jan 2012 02:15:26 GMT",
"version": "v2"
}
] | 2012-01-26 | [
[
"Satheeshkumar",
"V. H.",
""
],
[
"Suresh",
"P. K.",
""
]
] | Gravity is one of the most inexplicable forces of nature, controlling everything, from the expansion of the Universe to the ebb and flow of ocean tides. The search for the laws of motion and gravitation began more than two thousand years ago but still we do not have the complete picture of it. In this article, we have ... |
gr-qc/9403045 | null | G. Wanders | Fermion emission in a two-dimensional black hole space-time | 34 pages in LaTeX with fleqn, math and texdraw, 1 Fig. available on
request, UNIL-TP-1/94 | Phys.Rev. D50 (1994) 2731-2743 | 10.1103/PhysRevD.50.2731 | null | gr-qc hep-th | null | We investigate massless fermion production by a two-dimensional dilatonic
black hole. Our analysis is based on the Bogoliubov transformation relating the
outgoing fermion field observed outside the black hole horizon to the incoming
field present before the black hole creation. It takes full account of the fact
that ... | [
{
"created": "Tue, 22 Mar 1994 13:29:53 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Wanders",
"G.",
""
]
] | We investigate massless fermion production by a two-dimensional dilatonic black hole. Our analysis is based on the Bogoliubov transformation relating the outgoing fermion field observed outside the black hole horizon to the incoming field present before the black hole creation. It takes full account of the fact that th... |
gr-qc/0403036 | Yuichirou Sekiguchi | Yu-ichirou Sekiguchi and Masaru Shibata | New criterion for direct black hole formation in rapidly rotating
stellar collapse | submitted to PRD | Phys.Rev. D70 (2004) 084005 | 10.1103/PhysRevD.70.084005 | null | gr-qc astro-ph | null | We study gravitational collapse of rapidly rotating relativistic polytropes
of the adiabatic index $\Gamma = 1.5$ and 2, in which the spin parameter $q
\equiv J/M^{2} > 1$ where $J$ and $M$ are total angular momentum and
gravitational mass, in full general relativity.
First, analyzing initial distributions of the m... | [
{
"created": "Tue, 9 Mar 2004 03:59:22 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Sekiguchi",
"Yu-ichirou",
""
],
[
"Shibata",
"Masaru",
""
]
] | We study gravitational collapse of rapidly rotating relativistic polytropes of the adiabatic index $\Gamma = 1.5$ and 2, in which the spin parameter $q \equiv J/M^{2} > 1$ where $J$ and $M$ are total angular momentum and gravitational mass, in full general relativity. First, analyzing initial distributions of the mass ... |
1506.02123 | Titus K Mathew | Titus K. Mathew, Chinthak Murali and Shejeelammal J | Evolution of entropic dark energy and its phantom nature | 14 pages, 8 figures | null | 10.1142/S0217732316500711 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Assuming the form of the entropic dark energy as arises form the surface term
in the Einstein-Hilbert's action, it's evolution were analyzed in an expanding
flat universe. The model parameters were evaluated by constraining model using
the Union data on Type Ia supernovae. We found that the model predicts an early
de... | [
{
"created": "Sat, 6 Jun 2015 06:55:23 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jun 2015 07:18:50 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Dec 2015 06:43:49 GMT",
"version": "v3"
}
] | 2016-04-27 | [
[
"Mathew",
"Titus K.",
""
],
[
"Murali",
"Chinthak",
""
],
[
"J",
"Shejeelammal",
""
]
] | Assuming the form of the entropic dark energy as arises form the surface term in the Einstein-Hilbert's action, it's evolution were analyzed in an expanding flat universe. The model parameters were evaluated by constraining model using the Union data on Type Ia supernovae. We found that the model predicts an early dece... |
gr-qc/0412027 | J. Ponce de Leon | J. Ponce de Leon | Testing Dark Energy and Cardassian Expansion for Causality | null | null | null | null | gr-qc | null | Causality principle is a powerful criterion that allows us to discriminate
between what is possible or not. In this paper we study the transition from
decelerated to accelerated expansion in the context of Cardassian and dark
energy models. We distinguish two important events during the transition. The
first one is t... | [
{
"created": "Tue, 7 Dec 2004 03:20:32 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Leon",
"J. Ponce",
""
]
] | Causality principle is a powerful criterion that allows us to discriminate between what is possible or not. In this paper we study the transition from decelerated to accelerated expansion in the context of Cardassian and dark energy models. We distinguish two important events during the transition. The first one is the... |
1505.07255 | Luis Acedo Rodr\'iguez | L. Acedo and M. M. Tung | Electromagnetic Waves in a Uniform Gravitational Field and Planck's
Postulate | 16 pages, 2 figures | Eur. J. Phys. 33 1073 (2012) | 10.1088/0143-0807/33/5/1073 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational redshift forms the central part of the majority of the
classical tests for the general theory of relativity. It could be successfully
checked even in laboratory experiments on the earth's surface. The standard
derivation of this effect is based on the distortion of the local structure of
spacetime i... | [
{
"created": "Wed, 27 May 2015 10:22:31 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Acedo",
"L.",
""
],
[
"Tung",
"M. M.",
""
]
] | The gravitational redshift forms the central part of the majority of the classical tests for the general theory of relativity. It could be successfully checked even in laboratory experiments on the earth's surface. The standard derivation of this effect is based on the distortion of the local structure of spacetime ind... |
2207.09967 | Pasquale Bosso | Pasquale Bosso, Mitja Fridman, Giuseppe Gaetano Luciano | Dark Matter as an effect of a minimal length | 8 pages, 1 figure | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we consider the implications of a phenomenological model of
quantum gravitational effects related to a minimal length, implemented via the
Generalized Uncertainty Principle. Such effects are applied to the
Bekenstein-Hawking entropy to derive a modified law of gravity through
Verlinde's conjecture. Impl... | [
{
"created": "Wed, 20 Jul 2022 15:19:49 GMT",
"version": "v1"
}
] | 2022-07-21 | [
[
"Bosso",
"Pasquale",
""
],
[
"Fridman",
"Mitja",
""
],
[
"Luciano",
"Giuseppe Gaetano",
""
]
] | In this work, we consider the implications of a phenomenological model of quantum gravitational effects related to a minimal length, implemented via the Generalized Uncertainty Principle. Such effects are applied to the Bekenstein-Hawking entropy to derive a modified law of gravity through Verlinde's conjecture. Implic... |
1003.1860 | Niels Warburton | Niels Warburton and Leor Barack | Self force on a scalar charge in Kerr spacetime: circular equatorial
orbits | 22 pages, 10 eps figures, correct horizon boundary condition | Phys.Rev.D81:084039,2010 | 10.1103/PhysRevD.81.084039 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a calculation of the scalar field self-force (SSF) acting on a
scalar-charge particle in a strong-field orbit around a Kerr black hole. Our
calculation specializes to circular and equatorial geodesic orbits. The
analysis is an implementation of the standard mode-sum regularization scheme:
We first calculat... | [
{
"created": "Tue, 9 Mar 2010 12:34:43 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Apr 2010 13:00:46 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Jun 2015 07:51:24 GMT",
"version": "v3"
}
] | 2015-06-30 | [
[
"Warburton",
"Niels",
""
],
[
"Barack",
"Leor",
""
]
] | We present a calculation of the scalar field self-force (SSF) acting on a scalar-charge particle in a strong-field orbit around a Kerr black hole. Our calculation specializes to circular and equatorial geodesic orbits. The analysis is an implementation of the standard mode-sum regularization scheme: We first calculate ... |
gr-qc/9605054 | Daniel Finley | J. D. Finley, III (Univ. of New Mexico), J. F. Pleba\'nski (CINVESTAV
del IPN, Mexico, D. F.), Maciej Przanowski (Technical University, \L\'od\'z,
Poland) | An Iterative Approach to Twisting and Diverging, Type N, Vacuum Einstein
Equations: A (Third-Order) Resolution of Stephani's `Paradox' | 11 pages, a plain TeX file, submitted to ``Classical and Quantum
Gravity'' | Class.Quant.Grav. 14 (1997) 489-498 | 10.1088/0264-9381/14/2/021 | null | gr-qc | null | In 1993, a proof was published, within ``Classical and Quantum Gravity,''
that there are no regular solutions to the {\it linearized} version of the
twisting, type-N, vacuum solutions of the Einstein field equations. While this
proof is certainly correct, we show that the conclusions drawn from that fact
were unwarra... | [
{
"created": "Fri, 24 May 1996 23:30:33 GMT",
"version": "v1"
}
] | 2012-08-27 | [
[
"Finley",
"J. D.",
"",
"Univ. of New Mexico"
],
[
"III",
"",
"",
"Univ. of New Mexico"
],
[
"Plebański",
"J. F.",
"",
"CINVESTAV\n del IPN, Mexico, D. F."
],
[
"Przanowski",
"Maciej",
"",
"Technical University, Łódź,\n Poland"
]
] | In 1993, a proof was published, within ``Classical and Quantum Gravity,'' that there are no regular solutions to the {\it linearized} version of the twisting, type-N, vacuum solutions of the Einstein field equations. While this proof is certainly correct, we show that the conclusions drawn from that fact were unwarrant... |
1508.02852 | Jun-Qi Guo | Jun-Qi Guo, Pankaj S. Joshi, and Jose T. Galvez Ghersi | Mass inflation and curvature divergence near the central singularity in
spherical collapse | 7 pages, 3 figures. Minor change. Related paper. arXiv:1507.01806 | Phys. Rev. D 92, 104044 (2015) | 10.1103/PhysRevD.92.104044 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study spherical scalar collapse toward a black hole formation and examine
the asymptotic dynamics near the central singularity of the formed black hole.
It is found that, in the vicinity of the singularity, due to the strong
backreaction of a scalar field on the geometry, the mass function inflates and
the Kretsch... | [
{
"created": "Wed, 12 Aug 2015 08:52:22 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Oct 2015 23:49:18 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Nov 2015 07:03:00 GMT",
"version": "v3"
}
] | 2015-11-30 | [
[
"Guo",
"Jun-Qi",
""
],
[
"Joshi",
"Pankaj S.",
""
],
[
"Ghersi",
"Jose T. Galvez",
""
]
] | We study spherical scalar collapse toward a black hole formation and examine the asymptotic dynamics near the central singularity of the formed black hole. It is found that, in the vicinity of the singularity, due to the strong backreaction of a scalar field on the geometry, the mass function inflates and the Kretschma... |
gr-qc/9903086 | Kristin Schleich | Kristin Schleich and Donald Witt | Exotic Spaces in Quantum Gravity I: Euclidean Quantum Gravity in Seven
Dimensions | AmsTex, 23 pages 5 eps figures; replaced figures with ones which are
hopefully viewable in pdf format | Class.Quant.Grav. 16 (1999) 2447-2469 | 10.1088/0264-9381/16/7/319 | null | gr-qc | null | It is well known that in four or more dimensions, there exist exotic
manifolds; manifolds that are homeomorphic but not diffeomorphic to each other.
More precisely, exotic manifolds are the same topological manifold but have
inequivalent differentiable structures. This situation is in contrast to the
uniqueness of th... | [
{
"created": "Tue, 23 Mar 1999 00:04:47 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Mar 1999 10:23:05 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Schleich",
"Kristin",
""
],
[
"Witt",
"Donald",
""
]
] | It is well known that in four or more dimensions, there exist exotic manifolds; manifolds that are homeomorphic but not diffeomorphic to each other. More precisely, exotic manifolds are the same topological manifold but have inequivalent differentiable structures. This situation is in contrast to the uniqueness of the ... |
gr-qc/0505086 | Robert T. Jantzen | Robert T. Jantzen | The densitized lapse ("Taub function") and the Taub time gauge in
cosmology | 22 pages, Latex article style, no figures | Nuovo Cim. B119 (2004) 697-715 | 10.1393/ncb/i2004-10177-7 | null | gr-qc | null | The role of the Taub time gauge in cosmology is linked to the use of the
densitized lapse function instead of the lapse function in the variational
principle approach to the Einstein equations. The spatial metric variational
equations then become the Ricci evolution equations, which are then
supplemented by the Einst... | [
{
"created": "Wed, 18 May 2005 18:46:50 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Jantzen",
"Robert T.",
""
]
] | The role of the Taub time gauge in cosmology is linked to the use of the densitized lapse function instead of the lapse function in the variational principle approach to the Einstein equations. The spatial metric variational equations then become the Ricci evolution equations, which are then supplemented by the Einstei... |
gr-qc/0603040 | Guihua Tian | Tian Gui-hua, Shi-kun Wang, Shuquan Zhong | Klein-Gordon equation and the stable problem in the Rindler space-time | 5pages, no figuer | null | null | null | gr-qc | null | The Klein-Gordon equation in the Rindler space-time is studied carefully. It
is shown that the stable properties depend on using what time coordinate to
define the initial time. If we use the Rindler time, the scalar field is
stable. Alternatively, if we use the Minkowski time, the scalar field may be
regarded unstab... | [
{
"created": "Sun, 12 Mar 2006 02:56:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gui-hua",
"Tian",
""
],
[
"Wang",
"Shi-kun",
""
],
[
"Zhong",
"Shuquan",
""
]
] | The Klein-Gordon equation in the Rindler space-time is studied carefully. It is shown that the stable properties depend on using what time coordinate to define the initial time. If we use the Rindler time, the scalar field is stable. Alternatively, if we use the Minkowski time, the scalar field may be regarded unstable... |
1211.5535 | Ryuichi Fujita | Ryuichi Fujita | Gravitational Waves from a Particle in Circular Orbits around a
Schwarzschild Black Hole to the 22nd Post-Newtonian Order | 22 pages, additional datafiles are available at <a
href="http://www2.yukawa.kyoto-u.ac.jp/~misao/BHPC/calcs.html">this http
URL</a> | Prog. Theor. Phys. 128 (2012) pp. 971-992 | 10.1143/PTP.128.971 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend our previous results of the 14th post-Newtonian (PN) order
expansion of gravitational waves for a test particle in circular orbits around
a Schwarzschild black hole to the 22PN order, i.e. $v^{44}$ beyond the leading
Newtonian approximation where $v$ is the orbital velocity of a test particle.
Comparing our... | [
{
"created": "Fri, 23 Nov 2012 16:04:44 GMT",
"version": "v1"
}
] | 2012-11-26 | [
[
"Fujita",
"Ryuichi",
""
]
] | We extend our previous results of the 14th post-Newtonian (PN) order expansion of gravitational waves for a test particle in circular orbits around a Schwarzschild black hole to the 22PN order, i.e. $v^{44}$ beyond the leading Newtonian approximation where $v$ is the orbital velocity of a test particle. Comparing our 2... |
1403.3879 | Tomasz Pawlowski | Tomasz Paw{\l}owski | Geometric time in quantum cosmology | 3 pages, To appear in Proceedings of the 13th Marcel Grossmann
Meeting (MG13), Stockholm, Sweden, 1-7 July 2012 | null | 10.1142/9789814623995_0416 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Various choices of the geometry degrees of freedom as the emergent time are
tested on the model of an isotropic universe with a scalar field of $\phi^2$
potential. Potential problems with each choices as well as possible
applications in loop quantization are discussed.
| [
{
"created": "Sun, 16 Mar 2014 03:50:51 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Pawłowski",
"Tomasz",
""
]
] | Various choices of the geometry degrees of freedom as the emergent time are tested on the model of an isotropic universe with a scalar field of $\phi^2$ potential. Potential problems with each choices as well as possible applications in loop quantization are discussed. |
1711.07597 | Jeremie Szeftel | Sergiu Klainerman, Jeremie Szeftel | Global Nonlinear Stability of Schwarzschild Spacetime under Polarized
Perturbations | 907 pages. The previous version was intended to be the first in a
sequence of three papers. This new version provides a full, comprehensive,
proof of the stability of Schwarzschild. It also revamps considerably the
material presented in the first version and provides a stronger result | null | null | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove the nonlinear stability of the Schwarzschild spacetime under axially
symmetric polarized perturbations, i.e. solutions of the Einstein vacuum
equations for asymptotically flat $1+3$ dimensional Lorentzian metrics which
admit a hypersurface orthogonal spacelike Killing vectorfield with closed
orbits. While bu... | [
{
"created": "Tue, 21 Nov 2017 01:23:42 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Dec 2018 22:41:31 GMT",
"version": "v2"
}
] | 2018-12-24 | [
[
"Klainerman",
"Sergiu",
""
],
[
"Szeftel",
"Jeremie",
""
]
] | We prove the nonlinear stability of the Schwarzschild spacetime under axially symmetric polarized perturbations, i.e. solutions of the Einstein vacuum equations for asymptotically flat $1+3$ dimensional Lorentzian metrics which admit a hypersurface orthogonal spacelike Killing vectorfield with closed orbits. While buil... |
gr-qc/0510040 | Peter D'Eath | A.N.St.J.Farley and P.D.D'Eath | Vaidya Space-Time in Black-Hole Evaporation | null | Gen.Rel.Grav. 38 (2006) 425-443 | 10.1007/s10714-006-0231-3 | null | gr-qc | null | Recently we have studied, using a boundary-value approach, quantum amplitudes
resulting from gravitational collapse to a black hole. Suitable boundary data
for all fields present are posed on initial and final space-like asymptotically
flat hypersurfaces $\Sigma_{I,F}$. The Lorentzian proper-time separation
between t... | [
{
"created": "Sat, 8 Oct 2005 16:22:56 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Farley",
"A. N. St. J.",
""
],
[
"D'Eath",
"P. D.",
""
]
] | Recently we have studied, using a boundary-value approach, quantum amplitudes resulting from gravitational collapse to a black hole. Suitable boundary data for all fields present are posed on initial and final space-like asymptotically flat hypersurfaces $\Sigma_{I,F}$. The Lorentzian proper-time separation between the... |
2010.13310 | Mikhail Shneider | Mikhail N. Shneider, Mikhail Pekker | Cavitation model of the initial stage of Big Bang | null | Physics of Fluids 33, 017116 (2021) | 10.1063/5.0035458 | null | gr-qc physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we propose a model for the initial stage of the development of
the Universe, analogous to cavitation in a liquid in a negative pressure field.
It is assumed that at the stage of inflation, multiple breaks of the metric
occur with the formation of areas of physical vacuum in which the generation of
matt... | [
{
"created": "Mon, 26 Oct 2020 03:36:24 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Nov 2020 23:39:51 GMT",
"version": "v2"
}
] | 2021-02-04 | [
[
"Shneider",
"Mikhail N.",
""
],
[
"Pekker",
"Mikhail",
""
]
] | In this paper, we propose a model for the initial stage of the development of the Universe, analogous to cavitation in a liquid in a negative pressure field. It is assumed that at the stage of inflation, multiple breaks of the metric occur with the formation of areas of physical vacuum in which the generation of matter... |
gr-qc/0110093 | Kechkin O. V. | Oleg V. Kechkin | Generation of heterotic string theory solutions from the stationary
Einstein-Maxwell fields | 16 pages in LATEX | Phys.Lett. B522 (2001) 166-176 | 10.1016/S0370-2693(01)01249-7 | null | gr-qc | null | A new formalism for construction of the stationary solutions is developed for
the four-dimensional gravity coupled to the dilaton, Kalb-Ramond and two
Maxwell fields in a low-energy heterotic string theory form. The result of
generation is automatically invariant in respect to subgroup of the stationary
charging symm... | [
{
"created": "Tue, 23 Oct 2001 00:58:16 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Kechkin",
"Oleg V.",
""
]
] | A new formalism for construction of the stationary solutions is developed for the four-dimensional gravity coupled to the dilaton, Kalb-Ramond and two Maxwell fields in a low-energy heterotic string theory form. The result of generation is automatically invariant in respect to subgroup of the stationary charging symmet... |
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