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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0604034 | Gioel Calabrese | Gioel Calabrese | Exact boundary conditions in numerical relativity using multiple grids:
scalar field tests | 14 pages, 5 figures. Included changes suggested by referees | Class.Quant.Grav. 23 (2006) 5439-5450 | 10.1088/0264-9381/23/17/019 | null | gr-qc | null | Cauchy-Characteristic Matching (CCM), the combination of a central 3+1 Cauchy
code with an exterior characteristic code connected across a time-like
interface, is a promising technique for the generation and extraction of
gravitational waves. While it provides a tool for the exact specification of
boundary conditions... | [
{
"created": "Fri, 7 Apr 2006 19:55:54 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Jul 2006 10:17:48 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Calabrese",
"Gioel",
""
]
] | Cauchy-Characteristic Matching (CCM), the combination of a central 3+1 Cauchy code with an exterior characteristic code connected across a time-like interface, is a promising technique for the generation and extraction of gravitational waves. While it provides a tool for the exact specification of boundary conditions f... |
1001.2177 | Sina Khorasani | Farhad Karimi, Sina Khorasani | Ray-tracing and Interferometry in Schwarzschild Geometry | accepted for publication in International Journal of Optics and
Photonics | International Journal of Optics and Photonics, vol. 5, no. 1, pp.
13-27 (2011) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here, we investigate the possible optical anisotropy of vacuum due to
gravitational field. In doing this, we provide sufficient evidence from direct
coordinate integration of the null-geodesic equations obtained from the
Lagrangian method, as well as ray-tracing equations obtained from the
Plebanski's equivalent medi... | [
{
"created": "Wed, 13 Jan 2010 14:26:14 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Nov 2011 00:55:40 GMT",
"version": "v10"
},
{
"created": "Wed, 17 Mar 2010 08:31:48 GMT",
"version": "v2"
},
{
"created": "Thu, 29 Apr 2010 09:23:26 GMT",
"version": "v3"
},
{
"... | 2012-02-29 | [
[
"Karimi",
"Farhad",
""
],
[
"Khorasani",
"Sina",
""
]
] | Here, we investigate the possible optical anisotropy of vacuum due to gravitational field. In doing this, we provide sufficient evidence from direct coordinate integration of the null-geodesic equations obtained from the Lagrangian method, as well as ray-tracing equations obtained from the Plebanski's equivalent medium... |
gr-qc/0504017 | Emanuele Berti | Emanuele Berti, Alessandra Buonanno, Clifford M. Will | Testing general relativity and probing the merger history of massive
black holes with LISA | 13 pages, 4 figures. Proceedings of GWDAW 9. Matches version accepted
in Classical and Quantum Gravity | Class.Quant.Grav. 22 (2005) S943-S954 | 10.1088/0264-9381/22/18/S08 | null | gr-qc astro-ph | null | Observations of binary inspirals with LISA will allow us to place bounds on
alternative theories of gravity and to study the merger history of massive
black holes (MBH). These possibilities rely on LISA's parameter estimation
accuracy. We update previous studies of parameter estimation including
non-precessional spin... | [
{
"created": "Tue, 5 Apr 2005 15:41:39 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Jun 2005 23:05:51 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Berti",
"Emanuele",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Will",
"Clifford M.",
""
]
] | Observations of binary inspirals with LISA will allow us to place bounds on alternative theories of gravity and to study the merger history of massive black holes (MBH). These possibilities rely on LISA's parameter estimation accuracy. We update previous studies of parameter estimation including non-precessional spin e... |
0902.3159 | Julien Larena | J. Larena | Spatially averaged cosmology in an arbitrary coordinate system | 8 pages, no figure. Replaced to match the version published in Phys.
Rev. D | Phys.Rev.D79:084006,2009 | 10.1103/PhysRevD.79.084006 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents a general averaging procedure for a set of observers
which are tilted with respect to the cosmological matter fluid. After giving
the full set of equations describing the local dynamics, we define the
averaging procedure and apply it to the scalar parts of Einstein's field
equations. In addition t... | [
{
"created": "Wed, 18 Feb 2009 14:55:52 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Apr 2009 08:42:11 GMT",
"version": "v2"
}
] | 2009-04-22 | [
[
"Larena",
"J.",
""
]
] | This paper presents a general averaging procedure for a set of observers which are tilted with respect to the cosmological matter fluid. After giving the full set of equations describing the local dynamics, we define the averaging procedure and apply it to the scalar parts of Einstein's field equations. In addition to ... |
2101.00832 | Jieci Wang | Qianqian Liu, Cuihong Wen, Jieci Wang, Jiliang Jing | Distribution and generation of quantum coherence for Gaussian states in
de Sitter space | 14pages, 7 figures | Ann. Phys. (Berlin) 2021, 2000536 | 10.1002/andp.202000536 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the distribution and generation of quantum coherence for two-mode
and multi-mode Gaussian states in de Sitter space. It is found that the quantum
coherence is redistributed among the mode in different open charts under the
curvature effect of de Sitter space. In particular, the Gaussian coherence for
the ini... | [
{
"created": "Mon, 4 Jan 2021 08:45:14 GMT",
"version": "v1"
}
] | 2022-06-22 | [
[
"Liu",
"Qianqian",
""
],
[
"Wen",
"Cuihong",
""
],
[
"Wang",
"Jieci",
""
],
[
"Jing",
"Jiliang",
""
]
] | We study the distribution and generation of quantum coherence for two-mode and multi-mode Gaussian states in de Sitter space. It is found that the quantum coherence is redistributed among the mode in different open charts under the curvature effect of de Sitter space. In particular, the Gaussian coherence for the initi... |
gr-qc/0407084 | Rafael A. Vera | Rafael A. Vera | A new relativity principle for bodies in different gravitational
potentials | 24 pages, latex, submitted to IJMP, corrected typos and improved
grammar | null | null | null | gr-qc | null | A general principle of non-equivalence for bodies and observers in different
G potentials (GP) was derived from correspondence of the Einstein's equivalence
principle either with optical physics or with gravitational experiments in
which bodies and observers are in different GP. According to it some relative
physical... | [
{
"created": "Thu, 22 Jul 2004 23:55:02 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Aug 2004 17:31:56 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Vera",
"Rafael A.",
""
]
] | A general principle of non-equivalence for bodies and observers in different G potentials (GP) was derived from correspondence of the Einstein's equivalence principle either with optical physics or with gravitational experiments in which bodies and observers are in different GP. According to it some relative physical c... |
1311.5508 | George Pappas Dr | George Pappas, Theocharis A. Apostolatos | Effectively universal behavior of rotating neutron stars in general
relativity makes them even simpler than their Newtonian counterparts | Main text followed by supplemental material. 11 figures and 4 tables.
Accepted for publication as a Letter in Physical Review Letters | Phys. Rev. Lett. 112, 121101 (2014) | 10.1103/PhysRevLett.112.121101 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently it was shown that slowly rotating neutron stars exhibit an
interesting correlation between their moment of inertia $I$, their quadrupole
moment $Q$, and their tidal deformation Love number $\lambda$ (the I-Love-Q
relations), independently of the equation of state of the compact object. In
the present work a ... | [
{
"created": "Thu, 21 Nov 2013 18:41:21 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Mar 2014 08:56:05 GMT",
"version": "v2"
}
] | 2014-03-31 | [
[
"Pappas",
"George",
""
],
[
"Apostolatos",
"Theocharis A.",
""
]
] | Recently it was shown that slowly rotating neutron stars exhibit an interesting correlation between their moment of inertia $I$, their quadrupole moment $Q$, and their tidal deformation Love number $\lambda$ (the I-Love-Q relations), independently of the equation of state of the compact object. In the present work a si... |
1406.1486 | Brajesh Gupt | Peter Diener, Brajesh Gupt, Miguel Megevand, Parampreet Singh | Numerical evolution of squeezed and non-Gaussian states in loop quantum
cosmology | 26 pages, 16 figures. v2: Discussion of the main results expanded | Class. Quantum Grav. 31 (2014) 165006 | 10.1088/0264-9381/31/16/165006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent years, numerical simulations with Gaussian initial states have
demonstrated the existence of a quantum bounce in loop quantum cosmology in
various models. A key issue pertaining to the robustness of the bounce and the
associated physics is to understand the quantum evolution for more general
initial states ... | [
{
"created": "Thu, 5 Jun 2014 19:20:11 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Jun 2014 19:20:18 GMT",
"version": "v2"
}
] | 2015-01-09 | [
[
"Diener",
"Peter",
""
],
[
"Gupt",
"Brajesh",
""
],
[
"Megevand",
"Miguel",
""
],
[
"Singh",
"Parampreet",
""
]
] | In recent years, numerical simulations with Gaussian initial states have demonstrated the existence of a quantum bounce in loop quantum cosmology in various models. A key issue pertaining to the robustness of the bounce and the associated physics is to understand the quantum evolution for more general initial states wh... |
1105.0938 | Sean Gryb B | Henrique Gomes, Sean Gryb, Tim Koslowski, Flavio Mercati | The gravity/CFT correspondence | 6 pages, 1 figure. Published version (EJPC). Significant revisions of
abstract/intro | Euro. Phys. J. C (2013) 75:2275 | 10.1140/epjc/s10052-013-2275-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General Relativity can be formulated in terms of a spatially Weyl invariant
gauge theory called Shape Dynamics. Using this formulation, we establish a
"bulk/bulk" duality between gravity and a Weyl invariant theory on spacelike
Cauchy hypersurfaces. This duality has two immediate consequences: i) it leads
trivially t... | [
{
"created": "Wed, 4 May 2011 20:44:54 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Jan 2013 15:53:50 GMT",
"version": "v2"
}
] | 2013-01-23 | [
[
"Gomes",
"Henrique",
""
],
[
"Gryb",
"Sean",
""
],
[
"Koslowski",
"Tim",
""
],
[
"Mercati",
"Flavio",
""
]
] | General Relativity can be formulated in terms of a spatially Weyl invariant gauge theory called Shape Dynamics. Using this formulation, we establish a "bulk/bulk" duality between gravity and a Weyl invariant theory on spacelike Cauchy hypersurfaces. This duality has two immediate consequences: i) it leads trivially to ... |
1411.2827 | Mariusz Dabrowski P. | Mariusz P. Dabrowski | Puzzles of the dark energy in the universe - phantom | 13 pages, no figures, REVTEX4-1, minor improvements, reference added | Eur. J. Phys. 36, 065017 (2015) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to some simple approach based on general physics tools
to describe the physical properties of a hypothetical particle which can be the
source of dark energy in the Universe known as phantom. Phantom is
characterized by the fact that it possesses negative momentum and kinetic
energy and that it g... | [
{
"created": "Sat, 8 Nov 2014 16:25:17 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Dec 2014 00:15:27 GMT",
"version": "v2"
}
] | 2015-09-15 | [
[
"Dabrowski",
"Mariusz P.",
""
]
] | This paper is devoted to some simple approach based on general physics tools to describe the physical properties of a hypothetical particle which can be the source of dark energy in the Universe known as phantom. Phantom is characterized by the fact that it possesses negative momentum and kinetic energy and that it giv... |
1907.07531 | Siddhartha E. Morales G. | Siddhartha E. Morales G. and Arundhati Dasgupta | Scalar and Fermion field interactions with a gravitational wave | 25 pages, 2 figures | Class.Quant.Grav. 37 (2020) 10, 105001 | 10.1088/1361-6382/ab79d6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Given that gravitational waves are the future probes of the universe, it is
important to test various physical effects of these on matter. This article
explores the first-order perturbation, caused by a planar gravitational wave,
on massless scalar and chiral fermions. We find a new propagating mode for the
perturbed... | [
{
"created": "Wed, 17 Jul 2019 13:59:36 GMT",
"version": "v1"
},
{
"created": "Wed, 20 May 2020 14:49:33 GMT",
"version": "v2"
},
{
"created": "Thu, 21 May 2020 02:40:28 GMT",
"version": "v3"
}
] | 2020-05-22 | [
[
"G.",
"Siddhartha E. Morales",
""
],
[
"Dasgupta",
"Arundhati",
""
]
] | Given that gravitational waves are the future probes of the universe, it is important to test various physical effects of these on matter. This article explores the first-order perturbation, caused by a planar gravitational wave, on massless scalar and chiral fermions. We find a new propagating mode for the perturbed f... |
gr-qc/9605059 | Jacob D. Bekenstein | Jacob D. Bekenstein | Black hole hair: twenty--five years after | 6 pages, Latex, Invited talk at the Second Sakharov Conference in
Physics, Moscow, May 20-24, 1996; briefer version to appear in the
proceedings | null | null | null | gr-qc astro-ph hep-th | null | Originally regarded as forbidden, black hole ``hair'' are fields associated
with a stationary black hole apart from the gravitational and electromagnetic
ones. Several stable stationary black hole solutions with gauge or Skyrme field
hair are known today within general relativity. We formulate here a ``no
scalar--hai... | [
{
"created": "Tue, 28 May 1996 12:41:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bekenstein",
"Jacob D.",
""
]
] | Originally regarded as forbidden, black hole ``hair'' are fields associated with a stationary black hole apart from the gravitational and electromagnetic ones. Several stable stationary black hole solutions with gauge or Skyrme field hair are known today within general relativity. We formulate here a ``no scalar--hair'... |
2010.13569 | Juho Lankinen | Juho Lankinen, Oskari Kerppo and Iiro Vilja | Reheating in the kination epoch via multi-channel decay of
gravitationally created massive scalars | 13 pages, 2 figures. arXiv admin note: text overlap with
arXiv:1910.07520 | Phys. Rev. D 103, 083522 (2021) | 10.1103/PhysRevD.103.083522 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a detailed study of reheating in the kination regime in a scenario
where the particle content is produced by gravitational production of massive
scalars decaying into massless scalars and fermions which eventually reheat the
Universe. A detailed calculation is given by using Boltzmann equations and
decay r... | [
{
"created": "Thu, 22 Oct 2020 16:11:08 GMT",
"version": "v1"
}
] | 2021-04-28 | [
[
"Lankinen",
"Juho",
""
],
[
"Kerppo",
"Oskari",
""
],
[
"Vilja",
"Iiro",
""
]
] | We provide a detailed study of reheating in the kination regime in a scenario where the particle content is produced by gravitational production of massive scalars decaying into massless scalars and fermions which eventually reheat the Universe. A detailed calculation is given by using Boltzmann equations and decay rat... |
gr-qc/9803016 | Jiri Podolsky | J. Podolsky, K. Vesely | Continuous coordinates for all impulsive pp - waves | 4 pages, LaTeX, no figures, to be published in Phys. Lett. A | Phys.Lett. A241 (1998) 145-147 | 10.1016/S0375-9601(98)00162-5 | KTF MFF UK JP3 | gr-qc | null | We present a coordinate system for a general impulsive gravitational pp -
wave in vacuum in which the metric is explicitly continuous, synchronous and
"transverse". Also, it is more appropriate for investigation of particle
motions.
| [
{
"created": "Wed, 4 Mar 1998 16:02:42 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Podolsky",
"J.",
""
],
[
"Vesely",
"K.",
""
]
] | We present a coordinate system for a general impulsive gravitational pp - wave in vacuum in which the metric is explicitly continuous, synchronous and "transverse". Also, it is more appropriate for investigation of particle motions. |
1807.05874 | Tiberiu Harko | Yunxin Ye, Tiberiu Harko, Shi-Dong Liang | Loop Quantum Cosmology with a noncommutative quantum deformed photon gas | 25 pages, 10 figures, accepted for publication in EPJC. arXiv admin
note: text overlap with arXiv:1612.04551 by other authors | The European Physical Journal C 78, Issue 7, article id. 587
(2018) | 10.1140/epjc/s10052-018-6059-7 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The noncommutativity of the space-time had important implications for the
very early Universe, when its size was of the order of the Planck length. An
important implication of this effect is the deformation of the standard
dispersion relation of special relativity. Moreover, in the Planck regime
gravity itself must b... | [
{
"created": "Fri, 13 Jul 2018 13:22:39 GMT",
"version": "v1"
}
] | 2018-10-09 | [
[
"Ye",
"Yunxin",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Liang",
"Shi-Dong",
""
]
] | The noncommutativity of the space-time had important implications for the very early Universe, when its size was of the order of the Planck length. An important implication of this effect is the deformation of the standard dispersion relation of special relativity. Moreover, in the Planck regime gravity itself must be ... |
1701.04103 | Wolfgang Muschik | Wolfgang Muschik | Exploitation of a special-relativistic entropy identity for one
component of a multi-component system | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Non-equilibrium and equilibrium thermodynamics of an interacting component of
a special-relativistic multi-component system is discussed by using an entropy
identity. The special case of the corresponding free component is considered.
| [
{
"created": "Sun, 15 Jan 2017 19:29:39 GMT",
"version": "v1"
}
] | 2017-01-17 | [
[
"Muschik",
"Wolfgang",
""
]
] | Non-equilibrium and equilibrium thermodynamics of an interacting component of a special-relativistic multi-component system is discussed by using an entropy identity. The special case of the corresponding free component is considered. |
1109.1201 | Massimo Villata | M. Villata | Reply to "Comment to a paper of M. Villata on antigravity" | 3 pages, accepted as a Letter to the Editor by Astrophysics and Space
Science | Astrophys Space Sci (2012) 337:15-17 | 10.1007/s10509-011-0940-2 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this short paper we reply to the Comment [arXiv:1108.4543] by M. J. T. F.
Cabbolet on Villata's theory of antigravity [arXiv:1103.4937]. The criticisms
of methodological and ontological kind presented by that author come from a
misinterpretation of some concepts, perhaps due to some lack of clarity or
omission of ... | [
{
"created": "Tue, 6 Sep 2011 14:30:26 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Nov 2011 15:23:01 GMT",
"version": "v2"
}
] | 2012-01-19 | [
[
"Villata",
"M.",
""
]
] | In this short paper we reply to the Comment [arXiv:1108.4543] by M. J. T. F. Cabbolet on Villata's theory of antigravity [arXiv:1103.4937]. The criticisms of methodological and ontological kind presented by that author come from a misinterpretation of some concepts, perhaps due to some lack of clarity or omission of de... |
gr-qc/9612066 | Neil John Cornish | Neil Cornish (DAMTP Cambridge) and Janna Levin (CfPA Berkeley) | The mixmaster universe: A chaotic Farey tale | 45 pages, RevTeX, 19 Figures included, submitted to PRD | Phys.Rev. D55 (1997) 7489-7510 | 10.1103/PhysRevD.55.7489 | CfPA-96-TH-17 | gr-qc chao-dyn nlin.CD | null | When gravitational fields are at their strongest, the evolution of spacetime
is thought to be highly erratic. Over the past decade debate has raged over
whether this evolution can be classified as chaotic. The debate has centered on
the homogeneous but anisotropic mixmaster universe. A definite resolution has
been la... | [
{
"created": "Mon, 30 Dec 1996 21:36:24 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Cornish",
"Neil",
"",
"DAMTP Cambridge"
],
[
"Levin",
"Janna",
"",
"CfPA Berkeley"
]
] | When gravitational fields are at their strongest, the evolution of spacetime is thought to be highly erratic. Over the past decade debate has raged over whether this evolution can be classified as chaotic. The debate has centered on the homogeneous but anisotropic mixmaster universe. A definite resolution has been lack... |
0906.0140 | Sergey Pavluchenko | I.V. Kirnos, A.N. Makarenko, S.A. Pavluchenko, A.V. Toporensky | The nature of singularity in multidimensional anisotropic Gauss-Bonnet
cosmology with a perfect fluid | 8 pages, 2 figs | Gen. Rel. Grav. 42: 2633,2010 | 10.1007/s10714-010-1004-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate dynamics of (4+1) and (5+1) dimensional flat anisotropic
Universe filled by a perfect fluid in the Gauss-Bonnet gravity. An analytical
solutions valid for particular values of the equation of state parameter
$w=1/3$ have been found. For other values of $w$ structure of cosmological
singularity have bee... | [
{
"created": "Sun, 31 May 2009 08:20:51 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Kirnos",
"I. V.",
""
],
[
"Makarenko",
"A. N.",
""
],
[
"Pavluchenko",
"S. A.",
""
],
[
"Toporensky",
"A. V.",
""
]
] | We investigate dynamics of (4+1) and (5+1) dimensional flat anisotropic Universe filled by a perfect fluid in the Gauss-Bonnet gravity. An analytical solutions valid for particular values of the equation of state parameter $w=1/3$ have been found. For other values of $w$ structure of cosmological singularity have been ... |
2101.02096 | Dawson Huth | Ramanath Cowsik, Dawson Huth, Tsitsi Madziwa-Nussinov | A New Torsion Balance for the Search of Long-range Interactions Coupling
to Baryon and Lepton Numbers | null | null | 10.1088/1361-6382/abfea4 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We have developed a torsion balance with a sensitivity about ten times better
than those of previously operating balances for the study of long range forces
coupling to baryon and lepton number. We present here the details of the design
and expected characteristics of this balance. Operation of this balance for a
yea... | [
{
"created": "Wed, 6 Jan 2021 15:39:32 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Mar 2021 18:40:57 GMT",
"version": "v2"
}
] | 2021-07-07 | [
[
"Cowsik",
"Ramanath",
""
],
[
"Huth",
"Dawson",
""
],
[
"Madziwa-Nussinov",
"Tsitsi",
""
]
] | We have developed a torsion balance with a sensitivity about ten times better than those of previously operating balances for the study of long range forces coupling to baryon and lepton number. We present here the details of the design and expected characteristics of this balance. Operation of this balance for a year ... |
2305.04695 | Vittorio De Falco Dr | Vittorio De Falco, Francesco Bajardi, Rocco D'Agostino, Micol Benetti,
Salvatore Capozziello | Exploring departures from Schwarzschild black hole in $f(R)$ gravity | 19 pages; 7 figures; 2 tables; accepted for publication on EPJ C 83,
456 (2023) | null | 10.1140/epjc/s10052-023-11601-z | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Different astrophysical methods can be combined to detect possible deviations
from General Relativity. In this work, we consider a class of $f(R)$ gravity
models selected by the existence of Noether symmetries. In this framework, it
is possible to determine a set of static and spherically symmetric black hole
solutio... | [
{
"created": "Mon, 8 May 2023 13:25:44 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Jun 2023 15:28:27 GMT",
"version": "v2"
}
] | 2023-06-07 | [
[
"De Falco",
"Vittorio",
""
],
[
"Bajardi",
"Francesco",
""
],
[
"D'Agostino",
"Rocco",
""
],
[
"Benetti",
"Micol",
""
],
[
"Capozziello",
"Salvatore",
""
]
] | Different astrophysical methods can be combined to detect possible deviations from General Relativity. In this work, we consider a class of $f(R)$ gravity models selected by the existence of Noether symmetries. In this framework, it is possible to determine a set of static and spherically symmetric black hole solutions... |
1704.08302 | Mahamat Saleh | Mahamat Saleh, Bouetou Bouetou Thomas and Kofan\'e Timol\'eon Cr\'epin | Thermodynamics and Phase transition from regular Bardeen black hole | 8 pages, 4 figures | null | 10.1007/s10773-018-3784-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, thermodynamics and phase transition are investigated for the
regular Bardeen black hole. Considering the metric of the Bardeen spacetime, we
derived the Unruh-Verlinde temperature. Using the first law of thermodynamics,
we derived the expression of the specific heat and plot its behavior. It
results th... | [
{
"created": "Wed, 26 Apr 2017 19:08:27 GMT",
"version": "v1"
}
] | 2018-06-13 | [
[
"Saleh",
"Mahamat",
""
],
[
"Thomas",
"Bouetou Bouetou",
""
],
[
"Crépin",
"Kofané Timoléon",
""
]
] | In this paper, thermodynamics and phase transition are investigated for the regular Bardeen black hole. Considering the metric of the Bardeen spacetime, we derived the Unruh-Verlinde temperature. Using the first law of thermodynamics, we derived the expression of the specific heat and plot its behavior. It results that... |
0706.4324 | Karthik Shankar | Karthik Shankar, Bernard. F. Whiting | Conformal coordinates of a constant density star | 13 pages. Figure 1 in page 7 and Figure 2 in page 13 | null | null | null | gr-qc | null | It is well known that the interior of a constant density spherical star is
conformally flat. In this paper we obtain the coordinate system in which the
conformal flatness of the metric manifests itself. In a similar way, we also
construct such coordinates for Robertson Walker metric.
| [
{
"created": "Thu, 28 Jun 2007 22:07:23 GMT",
"version": "v1"
}
] | 2007-07-02 | [
[
"Shankar",
"Karthik",
""
],
[
"Whiting",
"Bernard. F.",
""
]
] | It is well known that the interior of a constant density spherical star is conformally flat. In this paper we obtain the coordinate system in which the conformal flatness of the metric manifests itself. In a similar way, we also construct such coordinates for Robertson Walker metric. |
1202.1502 | Sharmanthie Fernando | Sharmanthie Fernando | Schwarzschild black hole surrounded by quintessence: Null geodesics | 25 pages, 20 figures. typos corrected and some of the notation
changed | Gen. Rel. Grav. Vol 44, 1857- 1879 (2012) | 10.1007/s10714-012-1368-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have studied the null geodesics of the Schwarzschild black hole surrounded
by quintessence matter. Quintessence matter is a candidate for dark energy.
Here, we have done a detailed analysis of the geodesics and exact solutions are
presented in terms of Jacobi-elliptic integrals for all possible energy and
angular ... | [
{
"created": "Tue, 7 Feb 2012 19:23:53 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Feb 2012 15:51:37 GMT",
"version": "v2"
},
{
"created": "Fri, 29 Jun 2012 15:25:29 GMT",
"version": "v3"
},
{
"created": "Fri, 15 Aug 2014 16:43:05 GMT",
"version": "v4"
}
] | 2015-06-04 | [
[
"Fernando",
"Sharmanthie",
""
]
] | We have studied the null geodesics of the Schwarzschild black hole surrounded by quintessence matter. Quintessence matter is a candidate for dark energy. Here, we have done a detailed analysis of the geodesics and exact solutions are presented in terms of Jacobi-elliptic integrals for all possible energy and angular mo... |
2406.18292 | Reggie Pantig | Gaetano Lambiase, Reggie C. Pantig, Ali \"Ovg\"un | Traces of quantum gravitational correction at third-order curvature
through the black hole shadow and particle deflection at the weak field limit | 9 pages, 0 figures. Comments are welcome! | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This study investigates the impact of the quantum-gravity correction at the
third-order curvature ($c_6$) on the black hole's shadow and deflection angle
on the weak field regime, both involving finite distances of observers. While
the calculation of the photonsphere and shadow radius $R_{\rm sh}$ can easily
be achie... | [
{
"created": "Wed, 26 Jun 2024 12:23:28 GMT",
"version": "v1"
}
] | 2024-06-27 | [
[
"Lambiase",
"Gaetano",
""
],
[
"Pantig",
"Reggie C.",
""
],
[
"Övgün",
"Ali",
""
]
] | This study investigates the impact of the quantum-gravity correction at the third-order curvature ($c_6$) on the black hole's shadow and deflection angle on the weak field regime, both involving finite distances of observers. While the calculation of the photonsphere and shadow radius $R_{\rm sh}$ can easily be achieve... |
2406.06324 | Chayan Chatterjee | Chayan Chatterjee and Karan Jani | Navigating Unknowns: Deep Learning Robustness for Gravitational Wave
Signal Reconstruction | null | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We present a rapid and reliable deep learning-based method for gravitational
wave signal reconstruction from elusive, generic binary black hole mergers in
LIGO data. We demonstrate that our model, \texttt{AWaRe}, effectively recovers
gravitational waves with parameters it has not encountered during training.
This inc... | [
{
"created": "Mon, 10 Jun 2024 14:41:14 GMT",
"version": "v1"
}
] | 2024-06-11 | [
[
"Chatterjee",
"Chayan",
""
],
[
"Jani",
"Karan",
""
]
] | We present a rapid and reliable deep learning-based method for gravitational wave signal reconstruction from elusive, generic binary black hole mergers in LIGO data. We demonstrate that our model, \texttt{AWaRe}, effectively recovers gravitational waves with parameters it has not encountered during training. This inclu... |
gr-qc/0205054 | A. Calogeracos | A. Calogeracos (Hellenic Air Force Academy, Dhekelia, Greece) | Radiation from perfect mirrors following prescribed relativistic
trajectories | Int. J. of Mod. Phys. A17, 1018 (2002) (talk presented at the Fifth
Workshop on Quantum Field Theory under External Conditions, Leipzig,
September 2001) | Int.J.Mod.Phys.A17:1018,2002 | 10.1142/S0217751X02010443 | null | gr-qc | null | The question is examined of a mirror which starts from rest and either (i)
accelerates for some time and eventually reverts to motion at constant
velocity, or (ii) continues accelerating forever. A sharp distinction is made
between cases (i) and (ii) concerning the spectrum of the emitted radiation,
and the qualitati... | [
{
"created": "Tue, 14 May 2002 14:40:21 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Calogeracos",
"A.",
"",
"Hellenic Air Force Academy, Dhekelia, Greece"
]
] | The question is examined of a mirror which starts from rest and either (i) accelerates for some time and eventually reverts to motion at constant velocity, or (ii) continues accelerating forever. A sharp distinction is made between cases (i) and (ii) concerning the spectrum of the emitted radiation, and the qualitative... |
1707.05085 | Guillaume Faye | Laura Bernard, Luc Blanchet, Alejandro Boh\'e, Guillaume Faye, Sylvain
Marsat | Conservative Dynamics of Binary Systems of Compact Objects at the Fourth
Post-Newtonian Order | 7 pages; contribution to the proceedings of the 52nd Rencontres de
Moriond, "Gravitation" | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review our recent derivation of a Fokker action describing the
conservative dynamics of a compact binary system at the fourth post-Newtonian
(4PN) approximation of general relativity. The two bodies are modeled by point
particles, which induces ultraviolet (UV) divergences that are cured by means
of dimensional re... | [
{
"created": "Mon, 17 Jul 2017 10:51:42 GMT",
"version": "v1"
}
] | 2017-07-18 | [
[
"Bernard",
"Laura",
""
],
[
"Blanchet",
"Luc",
""
],
[
"Bohé",
"Alejandro",
""
],
[
"Faye",
"Guillaume",
""
],
[
"Marsat",
"Sylvain",
""
]
] | We review our recent derivation of a Fokker action describing the conservative dynamics of a compact binary system at the fourth post-Newtonian (4PN) approximation of general relativity. The two bodies are modeled by point particles, which induces ultraviolet (UV) divergences that are cured by means of dimensional regu... |
1309.0652 | Deepak Vaid | Deepak Vaid | Non-abelian Gauge Fields from Defects in Spin-Networks | comments welcome | null | null | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by-nc-sa/3.0/ | \emph{Effective} gauge fields arise in the description of the dynamics of
defects in lattices of graphene in condensed matter. The interactions between
neighboring nodes of a lattice/spin-network are described by the Hubbard model
whose effective field theory at long distances is given by the Dirac equation
for an \e... | [
{
"created": "Tue, 3 Sep 2013 12:16:58 GMT",
"version": "v1"
}
] | 2013-09-04 | [
[
"Vaid",
"Deepak",
""
]
] | \emph{Effective} gauge fields arise in the description of the dynamics of defects in lattices of graphene in condensed matter. The interactions between neighboring nodes of a lattice/spin-network are described by the Hubbard model whose effective field theory at long distances is given by the Dirac equation for an \emp... |
1101.5333 | Carlos Augusto Romero Filho | C. Romero, J. B. Fonseca-Neto and M. L. Pucheu | Conformally flat spacetimes and Weyl frames | LATEX - 18 pages | null | 10.1007/s10701-011-9593-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the concepts of Weyl and Riemann frames in the context of metric
theories of gravity and state the fact that they are completely equivalent as
far as geodesic motion is concerned. We apply this result to conformally flat
spacetimes and show that a new picture arises when a Riemannian spacetime is
taken by ... | [
{
"created": "Thu, 27 Jan 2011 16:38:43 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Romero",
"C.",
""
],
[
"Fonseca-Neto",
"J. B.",
""
],
[
"Pucheu",
"M. L.",
""
]
] | We discuss the concepts of Weyl and Riemann frames in the context of metric theories of gravity and state the fact that they are completely equivalent as far as geodesic motion is concerned. We apply this result to conformally flat spacetimes and show that a new picture arises when a Riemannian spacetime is taken by me... |
gr-qc/0105014 | Lorenzo Iorio | Lorenzo Iorio | Testing General Relativity with LAGEOS, LAGEOS II and Ajisai
laser-ranged satellites | 2 tables and some references added: changes in text | J.Geodet.Soc.Jap.48:13-20,2002 | 10.11366/sokuchi1954.48.13 | null | gr-qc astro-ph physics.geo-ph physics.space-ph | null | The accuracy reached in the past few years by Satellite Laser Ranging (SLR)
allows for measuring even tiny features of the Earth's gravitational field
predicted by Einstein's General Relativity by means of artificial satellites.
The gravitomagnetic dragging of the orbit of a test body is currently under
measurement b... | [
{
"created": "Thu, 3 May 2001 09:38:15 GMT",
"version": "v1"
},
{
"created": "Fri, 4 May 2001 15:42:19 GMT",
"version": "v2"
},
{
"created": "Thu, 13 Dec 2001 19:09:02 GMT",
"version": "v3"
}
] | 2013-11-12 | [
[
"Iorio",
"Lorenzo",
""
]
] | The accuracy reached in the past few years by Satellite Laser Ranging (SLR) allows for measuring even tiny features of the Earth's gravitational field predicted by Einstein's General Relativity by means of artificial satellites. The gravitomagnetic dragging of the orbit of a test body is currently under measurement by ... |
1705.02794 | Donato Bini | Donato Bini, Andrea Geralico, Antonello Ortolan | Deviation and precession effects in the field of a weak gravitational
wave | 12 pages, 2 captioned figures, revtex macros used | Phys. Rev. D 95, 104044 (2017) | 10.1103/PhysRevD.95.104044 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Deviation and precession effects of a bunch of spinning particles in the
field of a weak gravitational plane wave are studied according to the
Mathisson-Papapetrou-Dixon (MPD) model. Before the passage of the wave the
particles are at rest with associated spin vector aligned along a given
direction with constant magn... | [
{
"created": "Mon, 8 May 2017 09:24:55 GMT",
"version": "v1"
}
] | 2017-06-07 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Ortolan",
"Antonello",
""
]
] | Deviation and precession effects of a bunch of spinning particles in the field of a weak gravitational plane wave are studied according to the Mathisson-Papapetrou-Dixon (MPD) model. Before the passage of the wave the particles are at rest with associated spin vector aligned along a given direction with constant magnit... |
1411.1811 | Kai Lin | Jin Li, Lu Zhang, Kai Lin and Hao Wen | Resonance of Gaussian electromagnetic field to the high frequency
gravitational waves | International Journal of Theoretical Physics (2016) | null | 10.1007/s10773-016-2977-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a Gaussian Beam (GB) resonant system for high frequency
gravitational waves (HFGWs) detection. At present, we find the optimal signal
strength in theory through setting the magnetic component of GB in a standard
gaussian form. Under the synchro-resonance condition, we study the signal
strength (i.e., tran... | [
{
"created": "Fri, 7 Nov 2014 01:50:59 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Nov 2014 02:13:10 GMT",
"version": "v2"
},
{
"created": "Sat, 28 May 2016 19:10:55 GMT",
"version": "v3"
}
] | 2016-05-31 | [
[
"Li",
"Jin",
""
],
[
"Zhang",
"Lu",
""
],
[
"Lin",
"Kai",
""
],
[
"Wen",
"Hao",
""
]
] | We consider a Gaussian Beam (GB) resonant system for high frequency gravitational waves (HFGWs) detection. At present, we find the optimal signal strength in theory through setting the magnetic component of GB in a standard gaussian form. Under the synchro-resonance condition, we study the signal strength (i.e., transv... |
2209.13452 | Luca Reali | Luca Reali, Andrea Antonelli, Roberto Cotesta, Ssohrab Borhanian,
Mesut \c{C}al{\i}\c{s}kan, Emanuele Berti, B. S. Sathyaprakash | The impact of confusion noise on golden binary neutron-star events in
next-generation terrestrial observatories | 6 pages, 2 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Next-generation terrestrial gravitational-wave observatories will detect
$\mathcal{O}(10^{5})$ signals from compact binary coalescences every year.
These signals can last for several hours in the detectors' sensitivity band and
they will be affected by multiple unresolved sources contributing to a
confusion-noise bac... | [
{
"created": "Tue, 27 Sep 2022 15:17:59 GMT",
"version": "v1"
}
] | 2022-09-28 | [
[
"Reali",
"Luca",
""
],
[
"Antonelli",
"Andrea",
""
],
[
"Cotesta",
"Roberto",
""
],
[
"Borhanian",
"Ssohrab",
""
],
[
"Çalışkan",
"Mesut",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Sathyaprakash",
"B. S.",
""
... | Next-generation terrestrial gravitational-wave observatories will detect $\mathcal{O}(10^{5})$ signals from compact binary coalescences every year. These signals can last for several hours in the detectors' sensitivity band and they will be affected by multiple unresolved sources contributing to a confusion-noise backg... |
2304.07071 | Anna Efremova | Anna O. Efremova and Alexander B. Balakin | Axionic extension of the Einstein-Dirac-aether theory: Degeneracy
removal with respect to shear of the aether flow | 3 pages, 0 figures, Short communication based on the talk presented
on the Fifth International Winter School Seminar on Gravitation, Astrophysics
and Cosmology Petrov Readings 2022, Kazan, Russia | Space, Time and Fundamental Interactions, 2023, N1(42), pp. 51-54 | 10.17238/issn2226-8812.2023.1.51--54 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider dynamics of the quartet of interacting cosmic substrata, which
includes the dynamic aether, presented by the unit timelike vector field, the
axionic dark matter, described by the pseudoscalar field, the spinor field
associated with fermion particles, and the gravity field. The extended set of
master equat... | [
{
"created": "Fri, 14 Apr 2023 11:48:59 GMT",
"version": "v1"
}
] | 2023-04-17 | [
[
"Efremova",
"Anna O.",
""
],
[
"Balakin",
"Alexander B.",
""
]
] | We consider dynamics of the quartet of interacting cosmic substrata, which includes the dynamic aether, presented by the unit timelike vector field, the axionic dark matter, described by the pseudoscalar field, the spinor field associated with fermion particles, and the gravity field. The extended set of master equatio... |
0810.3465 | Shaoyu Yin | Shaoyu Yin, Bin Wang, Ru-Keng Su | Temperature effect on the power spectrum in inflation | 10 pages, 2 figures | Phys.Lett.B675:84-87,2009 | 10.1016/j.physletb.2009.03.068 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/3.0/ | We examine the effect of the thermal vacuum on the power spectrum of
inflation by using the thermal field dynamics. We find that the thermal effect
influences the CMB anisotropy at large length scale. After removing the
divergence by using the holographic cutoff, we observe that the thermal vacuum
explains well the o... | [
{
"created": "Mon, 20 Oct 2008 05:59:21 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Mar 2009 03:40:23 GMT",
"version": "v2"
}
] | 2011-03-28 | [
[
"Yin",
"Shaoyu",
""
],
[
"Wang",
"Bin",
""
],
[
"Su",
"Ru-Keng",
""
]
] | We examine the effect of the thermal vacuum on the power spectrum of inflation by using the thermal field dynamics. We find that the thermal effect influences the CMB anisotropy at large length scale. After removing the divergence by using the holographic cutoff, we observe that the thermal vacuum explains well the obs... |
1808.02905 | Jun Zhang | Jun Zhang, Huan Yang | Gravitational floating orbits around hairy black holes | 7 pages, 6 figures; discussion on GWs from floating orbits around
IMBHs added, to appear in PRD | Phys. Rev. D 99, 064018 (2019) | 10.1103/PhysRevD.99.064018 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that gravitational floating orbits may exist for black holes with
rotating hairs. These black hole hairs could originate from the superradiant
growth of a light axion field around the rotating black holes. If a test
particle rotates around the black hole, its tidal field may resonantly trigger
the dynamical t... | [
{
"created": "Wed, 8 Aug 2018 18:19:59 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Aug 2018 16:37:01 GMT",
"version": "v2"
},
{
"created": "Sun, 10 Mar 2019 20:14:43 GMT",
"version": "v3"
}
] | 2019-03-27 | [
[
"Zhang",
"Jun",
""
],
[
"Yang",
"Huan",
""
]
] | We show that gravitational floating orbits may exist for black holes with rotating hairs. These black hole hairs could originate from the superradiant growth of a light axion field around the rotating black holes. If a test particle rotates around the black hole, its tidal field may resonantly trigger the dynamical tra... |
gr-qc/9606085 | Monica Pierri | A. Ashtekar and M. Pierri | Probing Quantum Gravity Through Exactly Soluble Midi-Superspaces I | 28 pages, latex | J.Math.Phys. 37 (1996) 6250-6270 | 10.1063/1.531774 | CGPG-96/5-3 | gr-qc | null | It is well-known that the Einstein-Rosen solutions to the 3+1 dimensional
vacuum Einstein's equations are in one to one correspondence with solutions of
2+1 dimensional general relativity coupled to axi-symmetric, zero rest mass
scalar fields. We first re-examine the quanization of this midi-superspace
paying special... | [
{
"created": "Fri, 28 Jun 1996 18:52:01 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Ashtekar",
"A.",
""
],
[
"Pierri",
"M.",
""
]
] | It is well-known that the Einstein-Rosen solutions to the 3+1 dimensional vacuum Einstein's equations are in one to one correspondence with solutions of 2+1 dimensional general relativity coupled to axi-symmetric, zero rest mass scalar fields. We first re-examine the quanization of this midi-superspace paying special a... |
2307.11350 | Rafael Hern\'andez-Jim\'enez | Rafael Hern\'andez-Jim\'enez and Claudia Moreno | Geometrical scalar back-reaction effects in inflation | 21 pages, 10 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting with the Lagrangian formulation of General Relativity, we will
conduct an investigation into the production of spacetime waves, due to a
geometric boundary term of a closed extended manifold, within the tensor and
scalar sectors. This scheme will be studied in an inflationary universe. We
explore two distinc... | [
{
"created": "Fri, 21 Jul 2023 04:52:01 GMT",
"version": "v1"
}
] | 2023-07-24 | [
[
"Hernández-Jiménez",
"Rafael",
""
],
[
"Moreno",
"Claudia",
""
]
] | Starting with the Lagrangian formulation of General Relativity, we will conduct an investigation into the production of spacetime waves, due to a geometric boundary term of a closed extended manifold, within the tensor and scalar sectors. This scheme will be studied in an inflationary universe. We explore two distinct ... |
2407.08884 | Hemily Gomes Marciano Fortes | J. C. N de Araujo, H. G. M. Fortes | Compact stars in $f(Q) = Q +\xi Q^2$ gravity | null | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | General Relativity (GR) is not the only way gravity can be geometrised.
Instead of curvature, the Teleparallel Theory attributes gravity to torsion
$T$, which is related to the antysimmetric part of connection, and the
Symmetric Teleparallel theory no longer preserves metricity, describing gravity
through the non-met... | [
{
"created": "Thu, 11 Jul 2024 22:28:10 GMT",
"version": "v1"
}
] | 2024-07-15 | [
[
"de Araujo",
"J. C. N",
""
],
[
"Fortes",
"H. G. M.",
""
]
] | General Relativity (GR) is not the only way gravity can be geometrised. Instead of curvature, the Teleparallel Theory attributes gravity to torsion $T$, which is related to the antysimmetric part of connection, and the Symmetric Teleparallel theory no longer preserves metricity, describing gravity through the non-metri... |
2307.07974 | Ahmad Al-Badawi | Ahmad Al-Badawi | Probing regular MOG static spherically symmetric spacetime using
greybody factors and quasinormal modes | null | The European Physical Journal C, 83, 620 (2023) | 10.1140/epjc/s10052-023-11804-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the behavior of the regular modified gravity (MOG) static
spherically symmetric black hole (BH) under massless scalar perturbation,
gravitational perturbation, and massless Dirac perturbation. The dimensionless
parameter $\left( \alpha \right) $ distinguishes this BH from a Schwarzschild
BH. We derive ... | [
{
"created": "Sun, 16 Jul 2023 07:54:10 GMT",
"version": "v1"
}
] | 2023-07-18 | [
[
"Al-Badawi",
"Ahmad",
""
]
] | We investigate the behavior of the regular modified gravity (MOG) static spherically symmetric black hole (BH) under massless scalar perturbation, gravitational perturbation, and massless Dirac perturbation. The dimensionless parameter $\left( \alpha \right) $ distinguishes this BH from a Schwarzschild BH. We derive th... |
gr-qc/0702027 | Guillermo A. Mena Marugan | Pablo Galan, Guillermo A. Mena Marugan | Canonical Realizations of Doubly Special Relativity | 18 pages, accepted for publication in International Journal of Modern
Physics D | Int.J.Mod.Phys.D16:1133-1147,2007 | 10.1142/S0218271807010638 | null | gr-qc | null | Doubly Special Relativity is usually formulated in momentum space, providing
the explicit nonlinear action of the Lorentz transformations that incorporates
the deformation of boosts. Various proposals have appeared in the literature
for the associated realization in position space. While some are based on
noncommutat... | [
{
"created": "Mon, 5 Feb 2007 17:32:20 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Galan",
"Pablo",
""
],
[
"Marugan",
"Guillermo A. Mena",
""
]
] | Doubly Special Relativity is usually formulated in momentum space, providing the explicit nonlinear action of the Lorentz transformations that incorporates the deformation of boosts. Various proposals have appeared in the literature for the associated realization in position space. While some are based on noncommutativ... |
1302.3405 | Sergio Dain | Sergio Dain | Positive energy theorems in General Relativity | To appear as a Chapter of "The Springer Handbook of Spacetime,"
edited by A. Ashtekar and V. Petkov. (Springer-Verlag, at Press). 29 pages.
Minor corrections | null | 10.1007/978-3-642-41992-8_18 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of this chapter is to present an introduction and also an overview of
some of the most relevant results concerning positivity energy theorems in
General Relativity. These theorems provide the answer to a long standing
problem that has been proved remarkably difficult to solve. They constitute one
of the major... | [
{
"created": "Thu, 14 Feb 2013 14:14:04 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Mar 2014 20:27:23 GMT",
"version": "v2"
}
] | 2015-06-15 | [
[
"Dain",
"Sergio",
""
]
] | The aim of this chapter is to present an introduction and also an overview of some of the most relevant results concerning positivity energy theorems in General Relativity. These theorems provide the answer to a long standing problem that has been proved remarkably difficult to solve. They constitute one of the major r... |
gr-qc/0003039 | Iver H. Brevik | I. Brevik and S. V. Pettersen | Can a Kasner Universe with a Viscous Cosmological Fluid be Anisotropic? | 8 pages, LaTeX, no figures. To appear in PRD | Phys.Rev.D61:127305,2000 | 10.1103/PhysRevD.61.127305 | null | gr-qc | null | A Bianchi type -I metric of Kasner form is considered, when the space is
filled with a viscous fluid. Whereas an ideal (nonviscous) fluid permits the
Kasner metric to be anisotropic provided that the fluid satisfies the
Zel'dovich equation of state, the viscous fluid does not permit the Kasner
metric to be anisotropi... | [
{
"created": "Thu, 9 Mar 2000 16:21:51 GMT",
"version": "v1"
}
] | 2009-01-14 | [
[
"Brevik",
"I.",
""
],
[
"Pettersen",
"S. V.",
""
]
] | A Bianchi type -I metric of Kasner form is considered, when the space is filled with a viscous fluid. Whereas an ideal (nonviscous) fluid permits the Kasner metric to be anisotropic provided that the fluid satisfies the Zel'dovich equation of state, the viscous fluid does not permit the Kasner metric to be anisotropic ... |
1212.0631 | Sumati Surya | Mriganko Roy, Debdeep Sinha and Sumati Surya | The Discrete Geometry of a Small Causal Diamond | 22 pages, 2 figures | null | 10.1103/PhysRevD.87.044046 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the discrete causal set geometry of a small causal diamond in a
curved spacetime using the average abundance of k-element chains or total
orders in the underlying causal set C. We begin by obtaining the first order
curvature corrections to the flat spacetime expression for the abundance using
Riemann normal ... | [
{
"created": "Tue, 4 Dec 2012 07:28:46 GMT",
"version": "v1"
}
] | 2013-03-14 | [
[
"Roy",
"Mriganko",
""
],
[
"Sinha",
"Debdeep",
""
],
[
"Surya",
"Sumati",
""
]
] | We study the discrete causal set geometry of a small causal diamond in a curved spacetime using the average abundance of k-element chains or total orders in the underlying causal set C. We begin by obtaining the first order curvature corrections to the flat spacetime expression for the abundance using Riemann normal co... |
gr-qc/0310049 | Gabriela Gonz\'alez | Gabriela Gonz\'alez (for the LIGO Science Collaboration) | Binary Neutron Star Inspiral Search in LIGO S1 | null | Class.Quant.Grav. 21 (2004) S691-S696 | null | null | gr-qc | null | We describe the search for gravitational waves from inspiraling neutron star
binary systems, using data from the first Scientific Run of the LIGO Science
Collaboration.
| [
{
"created": "Wed, 8 Oct 2003 17:55:51 GMT",
"version": "v1"
}
] | 2019-08-14 | [
[
"González",
"Gabriela",
"",
"for the LIGO Science Collaboration"
]
] | We describe the search for gravitational waves from inspiraling neutron star binary systems, using data from the first Scientific Run of the LIGO Science Collaboration. |
0708.0107 | Dr. Anirudh Pradhan | Anirudh Pradhan | Magnetized String Cosmological Model in Cylindrically Symmetric
Inhomogeneous Universe with Variable Cosmological-Term $\Lambda$ | 19 pages, 4 figures. arXiv admin note: substantial text overlap with
arXiv:0705.0904 | FizikaB16:205-222,2007 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cylindrically symmetric inhomogeneous magnetized string cosmological model is
investigated with cosmological term $\Lambda$ varying with time. To get the
deterministic solution, it has been assumed that the expansion ($\theta$) in
the model is proportional to the eigenvalue $\sigma^{1}_{1}$ of the shear
tensor $\sigm... | [
{
"created": "Wed, 1 Aug 2007 10:07:47 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Jul 2008 14:42:00 GMT",
"version": "v2"
}
] | 2014-05-06 | [
[
"Pradhan",
"Anirudh",
""
]
] | Cylindrically symmetric inhomogeneous magnetized string cosmological model is investigated with cosmological term $\Lambda$ varying with time. To get the deterministic solution, it has been assumed that the expansion ($\theta$) in the model is proportional to the eigenvalue $\sigma^{1}_{1}$ of the shear tensor $\sigma^... |
1507.03847 | Bijan Saha Dr. | Bijan Saha | Nonlinear Spinor Fields in Bianchi type-VI spacetime | 21 pages, 6 figures. arXiv admin note: substantial text overlap with
arXiv:1504.03883 | Eur. Phys. J. Plus. (2016) 131: 170 | 10.1140/epjp/i2016-16170-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the scope of Bianchi type-VI cosmological model we study the role of
spinor field in the evolution of the Universe. It is found that due to the
spinor affine connections the energy-momentum tensor of the spinor field
possesses non-diagonal components. The non-triviality of non-diagonal
components of the energy... | [
{
"created": "Tue, 14 Jul 2015 13:40:57 GMT",
"version": "v1"
},
{
"created": "Mon, 23 May 2016 13:34:14 GMT",
"version": "v2"
}
] | 2016-05-24 | [
[
"Saha",
"Bijan",
""
]
] | Within the scope of Bianchi type-VI cosmological model we study the role of spinor field in the evolution of the Universe. It is found that due to the spinor affine connections the energy-momentum tensor of the spinor field possesses non-diagonal components. The non-triviality of non-diagonal components of the energy-m... |
1906.02744 | Florian Kuhnel | Florian Kuhnel, Katherine Freese | On Stochastic Effects and Primordial Black-Hole Formation | 5 pages, 3 figures; v2: revision to match published version | Eur.Phys.J. C79 (2019) no.11, 954 | 10.1140/epjc/s10052-019-7466-0 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effect of large quantum fluctuations on primordial black-hole formation
during an inflationary phase along a plateau is investigated. By using
techniques of stochastic inflation in combination with replica field theory and
the Feynman-Jensen variational method, it is non-perturbatively demonstrated
that the abund... | [
{
"created": "Thu, 6 Jun 2019 17:59:48 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Nov 2019 23:56:57 GMT",
"version": "v2"
}
] | 2019-12-06 | [
[
"Kuhnel",
"Florian",
""
],
[
"Freese",
"Katherine",
""
]
] | The effect of large quantum fluctuations on primordial black-hole formation during an inflationary phase along a plateau is investigated. By using techniques of stochastic inflation in combination with replica field theory and the Feynman-Jensen variational method, it is non-perturbatively demonstrated that the abundan... |
1202.6183 | Kirill Krasnov | Kirill Krasnov | A Gauge Theoretic Approach to Gravity | 40 pages; invited review to appear in Proceedings of the Royal
Society A | null | 10.1098/rspa.2011.0638 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein's General Relativity (GR) is a dynamical theory of the spacetime
metric. We describe an approach in which GR becomes an SU(2) gauge theory. We
start at the linearised level and show how a gauge theoretic Lagrangian for
non-interacting massless spin two particles (gravitons) takes a much more
simple and compa... | [
{
"created": "Tue, 28 Feb 2012 11:35:36 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Krasnov",
"Kirill",
""
]
] | Einstein's General Relativity (GR) is a dynamical theory of the spacetime metric. We describe an approach in which GR becomes an SU(2) gauge theory. We start at the linearised level and show how a gauge theoretic Lagrangian for non-interacting massless spin two particles (gravitons) takes a much more simple and compact... |
gr-qc/9705044 | Yosef Verbin | J. Colding, N. K. Nielsen, Y. Verbin | Physical Interpretation of Cylindrically Symmetric Static Gravitational
Fields | 10 pages, RevTex, no figures | Phys.Rev.D56:3371-3380,1997 | 10.1103/PhysRevD.56.3371 | null | gr-qc hep-th | null | The explicit relationship is determined between the interior properties of a
static cylindrical matter distribution and the metric of the exterior
space-time according to Einstein gravity for space-time dimensionality larger
or equal to four. This is achieved through use of a coordinate system isotropic
in the transv... | [
{
"created": "Thu, 15 May 1997 15:28:47 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Colding",
"J.",
""
],
[
"Nielsen",
"N. K.",
""
],
[
"Verbin",
"Y.",
""
]
] | The explicit relationship is determined between the interior properties of a static cylindrical matter distribution and the metric of the exterior space-time according to Einstein gravity for space-time dimensionality larger or equal to four. This is achieved through use of a coordinate system isotropic in the transver... |
1705.04923 | Gao-Ming Deng | Gao-Ming Deng, Yong-Chang Huang | $Q$-$\Phi$ criticality and microstructure of charged AdS black holes in
$f(R)$ gravity | 17 pages, 12 figures | null | 10.1142/S0217751X17502049 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The phase transition and critical behaviours of charged AdS black holes in
$f(R)$ gravity with a conformally invariant Maxwell (CIM) source and constant
curvature are further investigated. As a highlight, this research is carried
out by employing new state parameters $(T,Q,\Phi)$ and contributes to deeper
understandi... | [
{
"created": "Sun, 14 May 2017 06:49:22 GMT",
"version": "v1"
},
{
"created": "Tue, 16 May 2017 11:02:00 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Dec 2017 10:06:36 GMT",
"version": "v3"
}
] | 2018-01-10 | [
[
"Deng",
"Gao-Ming",
""
],
[
"Huang",
"Yong-Chang",
""
]
] | The phase transition and critical behaviours of charged AdS black holes in $f(R)$ gravity with a conformally invariant Maxwell (CIM) source and constant curvature are further investigated. As a highlight, this research is carried out by employing new state parameters $(T,Q,\Phi)$ and contributes to deeper understanding... |
gr-qc/0002034 | Piotr Bizon | P. Bizo\'n and A. Wasserman | On existence of mini-boson stars | 15 pages, 1 eps figure, LaTex | Commun.Math.Phys.215:357-373,2000 | 10.1007/s002200000307 | null | gr-qc | null | We prove the existence of a countable family of globally regular solutions of
spherically symmetric Einstein-Klein-Gordon equations. These solutions, known
as mini-boson stars, were discovered numerically many years ago.
| [
{
"created": "Tue, 8 Feb 2000 17:22:55 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Bizoń",
"P.",
""
],
[
"Wasserman",
"A.",
""
]
] | We prove the existence of a countable family of globally regular solutions of spherically symmetric Einstein-Klein-Gordon equations. These solutions, known as mini-boson stars, were discovered numerically many years ago. |
gr-qc/0011071 | Madhavan Varadarajan | Madhavan Varadarajan (RRI, India) | Kruskal coordinates as canonical variables for Schwarzschild black holes | 18 pages, no figures | Phys.Rev. D63 (2001) 084007 | 10.1103/PhysRevD.63.084007 | null | gr-qc | null | We derive a transformation from the usual ADM metric-extrinsic curvature
variables on the phase space of Schwarzschild black holes, to new canonical
variables which have the interpretation of Kruskal coordinates. We explicitly
show that this transformation is non-singular, even at the horizon. The
constraints of the ... | [
{
"created": "Tue, 21 Nov 2000 11:35:23 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Varadarajan",
"Madhavan",
"",
"RRI, India"
]
] | We derive a transformation from the usual ADM metric-extrinsic curvature variables on the phase space of Schwarzschild black holes, to new canonical variables which have the interpretation of Kruskal coordinates. We explicitly show that this transformation is non-singular, even at the horizon. The constraints of the th... |
1110.3278 | Francesco Caravelli | Francesco Caravelli | Curved geometry and Graphs | are welcome. 4pp, 2 fig. Proceedings of Loops'11 Conference, Madrid | J. Phys.: Conf. Ser. 360 012039 (2012) | 10.1088/1742-6596/360/1/012039 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | Quantum Graphity is an approach to quantum gravity based on a background
independent formulation of condensed matter systems on graphs. We summarize
recent results obtained on the notion of emergent geometry from the point of
view of a particle hopping on the graph. We discuss the role of connectivity in
emergent Lor... | [
{
"created": "Fri, 14 Oct 2011 17:41:36 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Oct 2011 06:42:22 GMT",
"version": "v2"
},
{
"created": "Fri, 2 Mar 2012 14:22:18 GMT",
"version": "v3"
}
] | 2012-05-23 | [
[
"Caravelli",
"Francesco",
""
]
] | Quantum Graphity is an approach to quantum gravity based on a background independent formulation of condensed matter systems on graphs. We summarize recent results obtained on the notion of emergent geometry from the point of view of a particle hopping on the graph. We discuss the role of connectivity in emergent Loren... |
2202.00655 | Papantonopoulos Eleftherios | Stella Kiorpelidi, George Koutsoumbas, Andri Machattou, Eleftherios
Papantonopoulos | Topological Black Holes with curvature induced scalarization in the
extended scalar-tensor theories | 20 pages, 8 figures | null | 10.1103/PhysRevD.105.104039 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We study the perturbative behaviour of topological black holes in the
presence of a cosmological constant and a scalar field coupled to the
Gauss-Bonnet term. We calculate both analytically and numerically the
quasi-normal modes of scalar perturbations in the extended
scalar-tensor-Gauss-Bonnet gravity. In the case o... | [
{
"created": "Tue, 1 Feb 2022 18:52:07 GMT",
"version": "v1"
}
] | 2022-06-01 | [
[
"Kiorpelidi",
"Stella",
""
],
[
"Koutsoumbas",
"George",
""
],
[
"Machattou",
"Andri",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
]
] | We study the perturbative behaviour of topological black holes in the presence of a cosmological constant and a scalar field coupled to the Gauss-Bonnet term. We calculate both analytically and numerically the quasi-normal modes of scalar perturbations in the extended scalar-tensor-Gauss-Bonnet gravity. In the case of ... |
gr-qc/9902017 | John Baez | John C. Baez | Higher-Dimensional Algebra and Planck-Scale Physics | 22 pages LaTeX, 6 encapsulated Postscript figures | In Physics Meets Philosophy at the Planck Length, eds. Craig
Callender and Nick Huggett, Cambridge U. Press, Cambridge, 2001, pp. 177-195 | null | null | gr-qc hep-th math.CT math.QA | null | This is a nontechnical introduction to recent work on quantum gravity using
ideas from higher-dimensional algebra. We argue that reconciling general
relativity with the Standard Model requires a `background-free quantum theory
with local degrees of freedom propagating causally'. We describe the insights
provided by w... | [
{
"created": "Thu, 4 Feb 1999 18:54:52 GMT",
"version": "v1"
}
] | 2015-02-13 | [
[
"Baez",
"John C.",
""
]
] | This is a nontechnical introduction to recent work on quantum gravity using ideas from higher-dimensional algebra. We argue that reconciling general relativity with the Standard Model requires a `background-free quantum theory with local degrees of freedom propagating causally'. We describe the insights provided by wor... |
1108.0211 | Nikodem Poplawski | Nikodem J. Poplawski | Conformal time in a black-hole universe with torsion | 5 pages | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the Einstein-Cartan-Sciama-Kibble theory of gravity, the intrinsic spin of
fermionic matter generates spacetime torsion and induces gravitational
repulsion at extremely high densities. This repulsion prevents the collapsing
spin-fluid matter in a black hole from forming a singularity. Instead, the
interior of a bl... | [
{
"created": "Sun, 31 Jul 2011 23:59:24 GMT",
"version": "v1"
}
] | 2011-08-09 | [
[
"Poplawski",
"Nikodem J.",
""
]
] | In the Einstein-Cartan-Sciama-Kibble theory of gravity, the intrinsic spin of fermionic matter generates spacetime torsion and induces gravitational repulsion at extremely high densities. This repulsion prevents the collapsing spin-fluid matter in a black hole from forming a singularity. Instead, the interior of a blac... |
gr-qc/0002008 | Pia Astone | S. Frasca | Gravitational event search with five resonant antennas | Latex file, 9 pages, no figures. Compiled with frontieres.sty and
art10.sty (included) | Proceedings on the second GWDAW workshop. Orsay, nov 1997. Ed.
Frontieres | null | null | gr-qc | null | Five cryogenic resonant gravitational antennas are now in operation. This is
the first time that such a large number of high sensitive antennas are taking
data and an agreement on data exchange has been signed by the responsible
groups. The data exchanged will consist essentially in lists of ''candidate
events''. In ... | [
{
"created": "Wed, 2 Feb 2000 14:57:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Frasca",
"S.",
""
]
] | Five cryogenic resonant gravitational antennas are now in operation. This is the first time that such a large number of high sensitive antennas are taking data and an agreement on data exchange has been signed by the responsible groups. The data exchanged will consist essentially in lists of ''candidate events''. In th... |
gr-qc/9410007 | Takahiro Tanaka | Takahiro Tanaka | Decoherence on Quantum Tunneling in the Multi-Dimensional Wave Function
Approach | 27 pages revtex file, uuencoded postscript figure file is avilable
from tanaka@murasaki.scphys.kyoto-u.ac.jp upon request, KUNS1295 | Prog.Theor.Phys.93:67-86,1995 | 10.1143/PTP.93.67 | null | gr-qc | null | We consider fundamental problems on the understanding of the tunneling
phenomena in the context of the multi-dimensional wave function. In this paper,
we reconsider the quantum state after tunneling and extend our previous
formalism to the case when the quantum state before tunneling is in a squeezed
state. Through c... | [
{
"created": "Fri, 7 Oct 1994 04:29:57 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Tanaka",
"Takahiro",
""
]
] | We consider fundamental problems on the understanding of the tunneling phenomena in the context of the multi-dimensional wave function. In this paper, we reconsider the quantum state after tunneling and extend our previous formalism to the case when the quantum state before tunneling is in a squeezed state. Through con... |
0712.1130 | Stefano Liberati | Carlos Barcelo, Stefano Liberati, Sebastiano Sonego, Matt Visser | Fate of gravitational collapse in semiclassical gravity | revtex4, 14 pages, 2 figures | Phys.Rev.D77:044032,2008 | 10.1103/PhysRevD.77.044032 | null | gr-qc hep-th | null | While the outcome of gravitational collapse in classical general relativity
is unquestionably a black hole, up to now no full and complete semiclassical
description of black hole formation has been thoroughly investigated. Here we
revisit the standard scenario for this process. By analyzing how semiclassical
collapse... | [
{
"created": "Fri, 7 Dec 2007 13:00:28 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Barcelo",
"Carlos",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Sonego",
"Sebastiano",
""
],
[
"Visser",
"Matt",
""
]
] | While the outcome of gravitational collapse in classical general relativity is unquestionably a black hole, up to now no full and complete semiclassical description of black hole formation has been thoroughly investigated. Here we revisit the standard scenario for this process. By analyzing how semiclassical collapse p... |
gr-qc/0402096 | J. Fernando Barbero G. | J. Fernando Barbero G., Guillermo A. Mena Marugan, Eduardo J. S.
Villase\~nor | Quantum Cylindrical Waves and Sigma Models | 11 pages (DIN A4), accepted in International Journal of Modern
Physics D | Int.J.Mod.Phys. D13 (2004) 1119-1128 | 10.1142/S0218271804004554 | null | gr-qc | null | We analyze cylindrical gravitational waves in vacuo with general polarization
and develop a viewpoint complementary to that presented recently by Niedermaier
showing that the auxiliary sigma model associated with this family of waves is
not renormalizable in the standard perturbative sense.
| [
{
"created": "Mon, 23 Feb 2004 15:32:49 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"G.",
"J. Fernando Barbero",
""
],
[
"Marugan",
"Guillermo A. Mena",
""
],
[
"Villaseñor",
"Eduardo J. S.",
""
]
] | We analyze cylindrical gravitational waves in vacuo with general polarization and develop a viewpoint complementary to that presented recently by Niedermaier showing that the auxiliary sigma model associated with this family of waves is not renormalizable in the standard perturbative sense. |
gr-qc/9607078 | Alexander L. Gromov | Alexander Gromov (St-Petersburg State Thechnical University, Russia) | An Exact Solution with $f^2 = 1$ and $\Lambda \ne 0$ in the LTB model | LaTeX,12 pages; submitted to Theor.& Math. Physics | null | null | IRB-StP-GR-010896 | gr-qc | null | The exact solution in the LTB model with $f^2 = 1$, $\Lambda \ne 0$ is
studied. The initial conditions for the metrical function and its derivatives
generate the solution with complicated structure including the solutions like
"stripping of the shell", "collapce" and "core", or "accretion". In the limit
of big time t... | [
{
"created": "Wed, 31 Jul 1996 22:47:17 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gromov",
"Alexander",
"",
"St-Petersburg State Thechnical University, Russia"
]
] | The exact solution in the LTB model with $f^2 = 1$, $\Lambda \ne 0$ is studied. The initial conditions for the metrical function and its derivatives generate the solution with complicated structure including the solutions like "stripping of the shell", "collapce" and "core", or "accretion". In the limit of big time the... |
1012.5931 | Philippe G. LeFloch | Philippe G. LeFloch and Jacques Smulevici | Weakly regular T2 symmetric spacetimes. The global geometry of future
developments | 50 pages | null | null | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Under weak regularity assumptions, only, we develop a fully geometric theory
of vacuum Einstein spacetimes with T2 symmetry, establish the global
well-posedness of the initial value problem for Einstein's field equations, and
investigate the global causal structure of the constructed spacetimes. Our weak
regularity a... | [
{
"created": "Wed, 29 Dec 2010 12:51:15 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Apr 2011 16:25:05 GMT",
"version": "v2"
}
] | 2011-04-26 | [
[
"LeFloch",
"Philippe G.",
""
],
[
"Smulevici",
"Jacques",
""
]
] | Under weak regularity assumptions, only, we develop a fully geometric theory of vacuum Einstein spacetimes with T2 symmetry, establish the global well-posedness of the initial value problem for Einstein's field equations, and investigate the global causal structure of the constructed spacetimes. Our weak regularity ass... |
1211.1060 | Alexandre Le Tiec | Luc Blanchet, Alessandra Buonanno, Alexandre Le Tiec | First Law of Mechanics for Black Hole Binaries with Spins | 16 pages; matches the published version | Phys.Rev.D87:024030,2013 | 10.1103/PhysRevD.87.024030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the canonical Hamiltonian formalism to generalize to spinning point
particles the first law of mechanics established for binary systems of
non-spinning point masses moving on circular orbits [Le Tiec, Blanchet, and
Whiting, Phys. Rev. D 85, 064039 (2012)]. We find that the redshift observable
of each particle ... | [
{
"created": "Mon, 5 Nov 2012 22:28:04 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Jan 2013 23:47:00 GMT",
"version": "v2"
}
] | 2013-08-26 | [
[
"Blanchet",
"Luc",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Tiec",
"Alexandre Le",
""
]
] | We use the canonical Hamiltonian formalism to generalize to spinning point particles the first law of mechanics established for binary systems of non-spinning point masses moving on circular orbits [Le Tiec, Blanchet, and Whiting, Phys. Rev. D 85, 064039 (2012)]. We find that the redshift observable of each particle is... |
gr-qc/9806021 | Alberto Vecchio | Bruno Bertotti, Alberto Vecchio, Luciano Iess | Gravitational waves from coalescing binaries and Doppler experiments | 52 pages, LaTeX, 19 Postscript Figures, submitted to Phys. Rev. D | Phys.Rev.D59:082001,1999 | 10.1103/PhysRevD.59.082001 | null | gr-qc | null | Doppler tracking of interplanetary spacecraft provides the only method
presently available for broad-band searches of low frequency gravitational
waves. The instruments have a peak sensitivity around the reciprocal of the
round-trip light-time T of the radio link connecting the Earth to the
space-probe and therefore ... | [
{
"created": "Thu, 4 Jun 1998 11:13:47 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Bertotti",
"Bruno",
""
],
[
"Vecchio",
"Alberto",
""
],
[
"Iess",
"Luciano",
""
]
] | Doppler tracking of interplanetary spacecraft provides the only method presently available for broad-band searches of low frequency gravitational waves. The instruments have a peak sensitivity around the reciprocal of the round-trip light-time T of the radio link connecting the Earth to the space-probe and therefore ar... |
1312.5574 | Ozay Gurtug | M. Halilsoy, O. Gurtug and S. Habib Mazharimousavi | Rindler Modified Schwarzschild Geodesics | 15 pages, 13 figures | Gen. Rel. Grav. 45, 2363 (2013) | 10.1007/s10714-013-1593-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The mysterious attractive constant radial force acted in the past on Pioneer
spacecrafts - the so-called Pioneer anomaly - is considered within the context
of Rindler acceleration. As an idea this is tempting since it is reminiscent of
the cosmological constant. Fortunately the anomalous force acts radially toward
th... | [
{
"created": "Thu, 19 Dec 2013 15:01:10 GMT",
"version": "v1"
}
] | 2013-12-20 | [
[
"Halilsoy",
"M.",
""
],
[
"Gurtug",
"O.",
""
],
[
"Mazharimousavi",
"S. Habib",
""
]
] | The mysterious attractive constant radial force acted in the past on Pioneer spacecrafts - the so-called Pioneer anomaly - is considered within the context of Rindler acceleration. As an idea this is tempting since it is reminiscent of the cosmological constant. Fortunately the anomalous force acts radially toward the ... |
gr-qc/0107047 | Michael A. Ivanov | Michael A. Ivanov | Model of graviton-dusty universe | Contribution to the 15th SIGRAV Conference on General Relativity and
Gravitational Physics, September 9-12, 2002, Rome, Italy | null | null | null | gr-qc | null | Primary features of a new cosmological model, which is based on conjectures
about an existence of the graviton background and superstrong gravitational
quantum interaction, are considered. An expansion of the universe is impossible
in such the model because of deceleration of massive objects by the graviton
backgroun... | [
{
"created": "Thu, 12 Jul 2001 17:50:40 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jun 2002 16:18:14 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Sep 2002 09:55:57 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Ivanov",
"Michael A.",
""
]
] | Primary features of a new cosmological model, which is based on conjectures about an existence of the graviton background and superstrong gravitational quantum interaction, are considered. An expansion of the universe is impossible in such the model because of deceleration of massive objects by the graviton background,... |
gr-qc/9412019 | null | A.P. Balachandran, L. Chandar, Arshad Momen | Edge states in Gravity and Black Hole Physics | Revtex file, 22 pg. ( refs added , minor typos corrected) | Nucl.Phys.B461:581-596,1996 | 10.1016/0550-3213(95)00622-2 | SU-4240-590 | gr-qc hep-th | null | We show in the context of Einstein gravity that the removal of a spatial
region leads to the appearance of an infinite set of observables and their
associated edge states localized at its boundary. Such a boundary occurs in
certain approaches to the physics of black holes like the one based on the
membrane paradigm. ... | [
{
"created": "Tue, 6 Dec 1994 20:53:08 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Dec 1994 22:49:40 GMT",
"version": "v2"
}
] | 2010-11-01 | [
[
"Balachandran",
"A. P.",
""
],
[
"Chandar",
"L.",
""
],
[
"Momen",
"Arshad",
""
]
] | We show in the context of Einstein gravity that the removal of a spatial region leads to the appearance of an infinite set of observables and their associated edge states localized at its boundary. Such a boundary occurs in certain approaches to the physics of black holes like the one based on the membrane paradigm. Th... |
1912.01019 | Merced Montesinos | Merced Montesinos, Ricardo Escobedo, Jorge Romero, Mariano Celada | Canonical analysis of $n$-dimensional Palatini action without
second-class constraints | Paper's title was changed, expanded analysis, notation was changed a
bit, added reference, corrected typos | Phys. Rev. D 101, 024042 (2020) | 10.1103/PhysRevD.101.024042 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We carry out the canonical analysis of the $n$-dimensional Palatini action
with or without a cosmological constant $(n\geq3)$ introducing neither
second-class constraints nor resorting to any gauge fixing. This is
accomplished by providing an expression for the spatial components of the
connection that allows us to i... | [
{
"created": "Mon, 2 Dec 2019 19:00:04 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Jan 2020 19:13:19 GMT",
"version": "v2"
}
] | 2020-01-27 | [
[
"Montesinos",
"Merced",
""
],
[
"Escobedo",
"Ricardo",
""
],
[
"Romero",
"Jorge",
""
],
[
"Celada",
"Mariano",
""
]
] | We carry out the canonical analysis of the $n$-dimensional Palatini action with or without a cosmological constant $(n\geq3)$ introducing neither second-class constraints nor resorting to any gauge fixing. This is accomplished by providing an expression for the spatial components of the connection that allows us to iso... |
gr-qc/0203103 | Gobinda Majumder | A. Bhadra and K.K. Nandi | Do Scalar Tensor Cosmologies naturally explain all the current
cosmological observations ? | 6 pages, no figures, Latex | null | null | null | gr-qc | null | It is shown that the general scalar tensor cosmologies may explain all the
current cosmological observations without the need of invoking any ad hoc
missing energy density. The explanation is based entirely on the internal
dynamics of the theories. Two important predictions of the present analysis
are: the universe i... | [
{
"created": "Thu, 28 Mar 2002 13:02:42 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bhadra",
"A.",
""
],
[
"Nandi",
"K. K.",
""
]
] | It is shown that the general scalar tensor cosmologies may explain all the current cosmological observations without the need of invoking any ad hoc missing energy density. The explanation is based entirely on the internal dynamics of the theories. Two important predictions of the present analysis are: the universe is ... |
1704.00277 | Hamed Pejhan | Surena Rahbardehghan and Hamed Pejhan | On the graviton two-point function and its infrared behavior in de
Sitter spacetime | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In our previous paper (Phys. Rev. D 94, 104030 (2016)), inspired by the work
of Allen and Turyn (Nucl. Phys. B 292, 813 (1987)), we expressed the graviton
two-point function in terms of maximally symmetric bitensors in de Sitter
spacetime. Quite contrary to the result of their work, however, we explicitly
showed that... | [
{
"created": "Sun, 2 Apr 2017 09:54:59 GMT",
"version": "v1"
}
] | 2017-04-04 | [
[
"Rahbardehghan",
"Surena",
""
],
[
"Pejhan",
"Hamed",
""
]
] | In our previous paper (Phys. Rev. D 94, 104030 (2016)), inspired by the work of Allen and Turyn (Nucl. Phys. B 292, 813 (1987)), we expressed the graviton two-point function in terms of maximally symmetric bitensors in de Sitter spacetime. Quite contrary to the result of their work, however, we explicitly showed that t... |
1511.09268 | Anton Sheykin | A. A. Sheykin, S. A. Paston | Friedmann cosmology in Regge-Teitelboim gravity | LaTeX, 7 pages, based on a talk given at 9th Alexander Friedmann
International Seminar, St. Petersburg, Russia, June 21-27, 2015 | International Journal of Modern Physics: Conference Series, Vol.
41, 1660128 (2016) | 10.1142/S2010194516601289 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to the approach to gravity as a theory of a surface
embedded in a flat ambient space. After the brief review of the properties of
original theory by Regge and Teitelboim we concentrate on its field-theoretic
reformulation, which we call splitting theory. In this theory embedded surfaces
are defi... | [
{
"created": "Mon, 30 Nov 2015 12:25:11 GMT",
"version": "v1"
}
] | 2021-08-03 | [
[
"Sheykin",
"A. A.",
""
],
[
"Paston",
"S. A.",
""
]
] | This paper is devoted to the approach to gravity as a theory of a surface embedded in a flat ambient space. After the brief review of the properties of original theory by Regge and Teitelboim we concentrate on its field-theoretic reformulation, which we call splitting theory. In this theory embedded surfaces are define... |
gr-qc/0606108 | Cliff Burgess | C.P. Burgess | Quantum Gravity and Precision Tests | Contribution to `Towards Quantum Gravity,' edited by D. Oriti,
Cambridge University Press, 2006; 18 pages, no figures | null | null | null | gr-qc | null | This article provides a cartoon of the quantization of General Relativity
using the ideas of effective field theory. These ideas underpin the use of
General Relativity as a theory from which precise predictions are possible,
since they show why quantum corrections to standard classical calculations are
small. Quantum... | [
{
"created": "Sat, 24 Jun 2006 15:50:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Burgess",
"C. P.",
""
]
] | This article provides a cartoon of the quantization of General Relativity using the ideas of effective field theory. These ideas underpin the use of General Relativity as a theory from which precise predictions are possible, since they show why quantum corrections to standard classical calculations are small. Quantum c... |
1503.01448 | Ryo Saito | Ryo Saito, Daisuke Yamauchi, Shuntaro Mizuno, J\'er\^ome Gleyzes,
David Langlois | Modified gravity inside astrophysical bodies | 11 pages, 6 figures | null | 10.1088/1475-7516/2015/06/008 | null | gr-qc astro-ph.CO astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many theories of modified gravity, including the well studied Horndeski
models, are characterized by a screening mechanism that ensures that standard
gravity is recovered near astrophysical bodies. In a recently introduced class
of gravitational theories that goes beyond Horndeski, it has been found that
new derivati... | [
{
"created": "Wed, 4 Mar 2015 20:38:53 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Saito",
"Ryo",
""
],
[
"Yamauchi",
"Daisuke",
""
],
[
"Mizuno",
"Shuntaro",
""
],
[
"Gleyzes",
"Jérôme",
""
],
[
"Langlois",
"David",
""
]
] | Many theories of modified gravity, including the well studied Horndeski models, are characterized by a screening mechanism that ensures that standard gravity is recovered near astrophysical bodies. In a recently introduced class of gravitational theories that goes beyond Horndeski, it has been found that new derivative... |
2208.02612 | Jaroslav Vrba Ph.D. | Zden\v{e}k Stuchl\'ik and Jaroslav Vrba | Geodesic Model of HF QPOs Tested for Black Holes in Spacetimes
Reflecting the Effect of Surrounding Dark Matter | 41 pages, 31 figures, 6 tables | null | 10.3847/1538-4357/ac7f27 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the simple but robust model of a shell of dark matter (DM) around a
Schwarzschild black hole (BH), represented by the mass ratio of the shell and
BH ${\Delta}M/M$, the shell extension ${\Delta}r_s$ and its inner radius $r_s$,
we study the influence of DM on the spacetime structure and geodesic motion,
and provi... | [
{
"created": "Tue, 2 Aug 2022 14:35:23 GMT",
"version": "v1"
}
] | 2022-08-31 | [
[
"Stuchlík",
"Zdeněk",
""
],
[
"Vrba",
"Jaroslav",
""
]
] | Using the simple but robust model of a shell of dark matter (DM) around a Schwarzschild black hole (BH), represented by the mass ratio of the shell and BH ${\Delta}M/M$, the shell extension ${\Delta}r_s$ and its inner radius $r_s$, we study the influence of DM on the spacetime structure and geodesic motion, and provide... |
1011.2598 | Robert Thompson | Robert T. Thompson and Jos\'e P.S. Lemos | DeWitt-Schwinger Renormalization of $<\phi^2>$ in $d$ Dimensions | Prepared for the Proceedings of the 12th Marcel Grossman Meeting
(MG12), Paris, France, 12-18 July, 2009 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A compact expression for the DeWitt-Schwinger renormalization terms suitable
for use in even-dimensional space-times is derived. This formula should be
useful for calculations of $<\phi^2(x)>$ and $<T_{\mu\nu}(x)>$ in even
dimensions.
| [
{
"created": "Thu, 11 Nov 2010 09:29:33 GMT",
"version": "v1"
}
] | 2016-08-14 | [
[
"Thompson",
"Robert T.",
""
],
[
"Lemos",
"José P. S.",
""
]
] | A compact expression for the DeWitt-Schwinger renormalization terms suitable for use in even-dimensional space-times is derived. This formula should be useful for calculations of $<\phi^2(x)>$ and $<T_{\mu\nu}(x)>$ in even dimensions. |
1612.08250 | Naoki Tsukamoto | Naoki Tsukamoto and Yungui Gong | Retrolensing by a charged black hole | 24 pages, 11 figures, minor correction, accepted for publication in
Physical Review D | Phys. Rev. D 95, 064034 (2017) | 10.1103/PhysRevD.95.064034 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Compact objects with a light sphere such as black holes and wormholes can
reflect light rays like a mirror. This gravitational lensing phenomenon is
called retrolensing and it is an interesting tool to survey dark and compact
objects with a light sphere near the solar system. In this paper, we calculate
the deflectio... | [
{
"created": "Sun, 25 Dec 2016 08:26:48 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Mar 2017 09:40:01 GMT",
"version": "v2"
}
] | 2017-03-24 | [
[
"Tsukamoto",
"Naoki",
""
],
[
"Gong",
"Yungui",
""
]
] | Compact objects with a light sphere such as black holes and wormholes can reflect light rays like a mirror. This gravitational lensing phenomenon is called retrolensing and it is an interesting tool to survey dark and compact objects with a light sphere near the solar system. In this paper, we calculate the deflection ... |
1601.03996 | Chad Middleton | Chad A. Middleton and Dannyl Weller | Elliptical-like orbits on a warped spandex fabric: A
theoretical/experimental undergraduate research project | To appear in the American Journal of Physics | null | 10.1119/1.4940246 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a theoretical and experimental analysis of the elliptical-like
orbits of a marble rolling on a warped spandex fabric. We arrive at an
expression describing the angular separation between successive apocenters, or
equivalently successive pericenters, in both the small and large slope regimes.
We find that a... | [
{
"created": "Fri, 15 Jan 2016 16:49:58 GMT",
"version": "v1"
}
] | 2016-04-20 | [
[
"Middleton",
"Chad A.",
""
],
[
"Weller",
"Dannyl",
""
]
] | We present a theoretical and experimental analysis of the elliptical-like orbits of a marble rolling on a warped spandex fabric. We arrive at an expression describing the angular separation between successive apocenters, or equivalently successive pericenters, in both the small and large slope regimes. We find that a m... |
1805.06548 | Q. H. Liu | J. Y. Zhou, Z. Li, Q. Li, X. Wang, Q. H. Liu | Comment on "New General Relativistic Contribution to Mercury's
Perihelion Advance" | 2 pages, no figure | null | null | null | gr-qc physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | C. M. Will in a recent Letter [arXiv:1802.05304] predicts a new Mercury's
precession rate which is $100$ times larger than the second-post-Newtonian
contribution, our calculation is about $30$ times larger. Thus the new
Mercury's precession rate is about $6.4\ast 10^{-8}$, instead of $6.2\ast
10^{-8}$, degrees per ce... | [
{
"created": "Wed, 16 May 2018 22:50:11 GMT",
"version": "v1"
},
{
"created": "Fri, 25 May 2018 15:06:38 GMT",
"version": "v2"
}
] | 2018-05-28 | [
[
"Zhou",
"J. Y.",
""
],
[
"Li",
"Z.",
""
],
[
"Li",
"Q.",
""
],
[
"Wang",
"X.",
""
],
[
"Liu",
"Q. H.",
""
]
] | C. M. Will in a recent Letter [arXiv:1802.05304] predicts a new Mercury's precession rate which is $100$ times larger than the second-post-Newtonian contribution, our calculation is about $30$ times larger. Thus the new Mercury's precession rate is about $6.4\ast 10^{-8}$, instead of $6.2\ast 10^{-8}$, degrees per cent... |
2309.05617 | Bernardo Araneda | Bernardo Araneda | Hidden symmetries of generalised gravitational instantons | 30 pages | null | null | null | gr-qc hep-th math.DG | http://creativecommons.org/licenses/by/4.0/ | For conformally K\"ahler Riemannian four-manifolds with a Killing field, we
develop a framework to solve the field equations for generalised gravitational
instantons corresponding to conformal self-duality and to cosmological
Einstein-Maxwell. We obtain generic identities for the curvature of such
manifolds without a... | [
{
"created": "Mon, 11 Sep 2023 17:05:43 GMT",
"version": "v1"
}
] | 2023-09-12 | [
[
"Araneda",
"Bernardo",
""
]
] | For conformally K\"ahler Riemannian four-manifolds with a Killing field, we develop a framework to solve the field equations for generalised gravitational instantons corresponding to conformal self-duality and to cosmological Einstein-Maxwell. We obtain generic identities for the curvature of such manifolds without ass... |
1810.12400 | Philip Beltracchi | Philip Beltracchi and Paolo Gondolo | Formation of dark energy stars | Replaced with published version | Phys. Rev. D 99, 044037 (2019) | 10.1103/PhysRevD.99.044037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dark energy stars are finite size astrophysical objects with an interior
equation of state typical of dark energy. Examples are self-gravitating false
vacuum bubbles, vacuum non-singular black holes, and gravastars. We present a
time-dependent solution of Einstein's field equations that describes the
collapse of a sp... | [
{
"created": "Mon, 29 Oct 2018 20:41:51 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Mar 2019 19:48:17 GMT",
"version": "v2"
}
] | 2019-03-08 | [
[
"Beltracchi",
"Philip",
""
],
[
"Gondolo",
"Paolo",
""
]
] | Dark energy stars are finite size astrophysical objects with an interior equation of state typical of dark energy. Examples are self-gravitating false vacuum bubbles, vacuum non-singular black holes, and gravastars. We present a time-dependent solution of Einstein's field equations that describes the collapse of a sphe... |
2005.03772 | Vasil Todorinov | Pasquale Bosso, Saurya Das and Vasil Todorinov | Quantum field theory with the generalized uncertainty principle II:
Quantum Electrodynamics | Submitted to Annals of Physics | Annals of Physics Volume 424, January 2021, 168350 | 10.1016/j.aop.2020.168350 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Continuing our earlier work on the application of the Relativistic
Generalized Uncertainty Principle (RGUP) to quantum field theories, in this
paper we study Quantum Electrodynamics (QED) with minimum length. We obtain
expressions for the Lagrangian, Feynman rules and scattering amplitudes of the
theory, and discuss ... | [
{
"created": "Thu, 7 May 2020 21:30:00 GMT",
"version": "v1"
}
] | 2021-02-15 | [
[
"Bosso",
"Pasquale",
""
],
[
"Das",
"Saurya",
""
],
[
"Todorinov",
"Vasil",
""
]
] | Continuing our earlier work on the application of the Relativistic Generalized Uncertainty Principle (RGUP) to quantum field theories, in this paper we study Quantum Electrodynamics (QED) with minimum length. We obtain expressions for the Lagrangian, Feynman rules and scattering amplitudes of the theory, and discuss th... |
1601.02357 | Shreya Banerjee | Shreya Banerjee, Sayantani Bera, Srimanta Banerjee and Tejinder P.
Singh | Constraints on fourth order gravity from binary pulsar and gravitational
waves | 11 pages plus appendices (total 18 pages), 1 figure, 1 table, text
modified, new calculations and references added, conclusions unchanged | Phys. Rev. D 96, 084015 (2017) | 10.1103/PhysRevD.96.084015 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have earlier proposed a fourth order gravity model as a possible
explanation for late time cosmic acceleration, and for flattened galaxy
rotation curves. The model has a free length parameter whose value depends on
the scale of the system under study (e.g. the whole Universe, a galaxy, or a
compact binary pulsar).... | [
{
"created": "Mon, 11 Jan 2016 08:32:09 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Jan 2016 06:32:51 GMT",
"version": "v2"
},
{
"created": "Thu, 25 May 2017 14:34:48 GMT",
"version": "v3"
}
] | 2017-10-11 | [
[
"Banerjee",
"Shreya",
""
],
[
"Bera",
"Sayantani",
""
],
[
"Banerjee",
"Srimanta",
""
],
[
"Singh",
"Tejinder P.",
""
]
] | We have earlier proposed a fourth order gravity model as a possible explanation for late time cosmic acceleration, and for flattened galaxy rotation curves. The model has a free length parameter whose value depends on the scale of the system under study (e.g. the whole Universe, a galaxy, or a compact binary pulsar). I... |
1304.2858 | Matteo Smerlak | Matteo Smerlak and Suprit Singh | New perspectives on Hawking radiation | 14 pages, 7 figures | Phys. Rev. D 88, 104023 (2013) | 10.1103/PhysRevD.88.104023 | AEI-2013-169 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop an adiabatic formalism to study the Hawking phenomenon from the
perspective of Unruh-DeWitt detectors moving along non-stationary,
non-asymptotic trajectories. When applied to geodesic trajectories, this
formalism yields the following results: (i) though they have zero acceleration,
the temperature measure... | [
{
"created": "Wed, 10 Apr 2013 07:12:41 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Apr 2013 10:05:04 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Jun 2013 19:51:00 GMT",
"version": "v3"
},
{
"created": "Wed, 30 Oct 2013 20:14:57 GMT",
"version": "v4"
}
] | 2013-11-27 | [
[
"Smerlak",
"Matteo",
""
],
[
"Singh",
"Suprit",
""
]
] | We develop an adiabatic formalism to study the Hawking phenomenon from the perspective of Unruh-DeWitt detectors moving along non-stationary, non-asymptotic trajectories. When applied to geodesic trajectories, this formalism yields the following results: (i) though they have zero acceleration, the temperature measured ... |
0704.2720 | Clifford M. Will | Jing Zeng and Clifford M. Will (Washington University, St. Louis) | Application of energy and angular momentum balance to gravitational
radiation reaction for binary systems with spin-orbit coupling | 12 pages, submitted to General Relativity and Gravitation | Gen.Rel.Grav.39:1661-1673,2007 | 10.1007/s10714-007-0475-6 | null | gr-qc | null | We study gravitational radiation reaction in the equations of motion for
binary systems with spin-orbit coupling, at order (v/c)^7 beyond Newtonian
gravity, or O(v/c)^2 beyond the leading radiation reaction effects for
non-spinning bodies. We use expressions for the energy and angular momentum
flux at infinity that i... | [
{
"created": "Fri, 20 Apr 2007 14:45:05 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Zeng",
"Jing",
"",
"Washington University, St. Louis"
],
[
"Will",
"Clifford M.",
"",
"Washington University, St. Louis"
]
] | We study gravitational radiation reaction in the equations of motion for binary systems with spin-orbit coupling, at order (v/c)^7 beyond Newtonian gravity, or O(v/c)^2 beyond the leading radiation reaction effects for non-spinning bodies. We use expressions for the energy and angular momentum flux at infinity that inc... |
gr-qc/0511147 | Giuseppe De Risi | G. De Risi | Relic gravitons on Kasner branes | 7 pages, talk given at the 4th QG05 meeting, Cala Gonone (Sardinia,
Italy), Sept. 12-16, 2005 | J.Phys.Conf.Ser. 33 (2006) 209-214 | 10.1088/1742-6596/33/1/020 | BA-TH/05-529 | gr-qc | null | We present a simple model in which a brane with anisotropic metric is
embedded in an AdS bulk. We discuss the localization of the massless mode and
the amplification of both the massless and the massive modes on the branes,
paying particular attention to the normalization of the perturbed action and to
the evaluation... | [
{
"created": "Mon, 28 Nov 2005 11:02:59 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"De Risi",
"G.",
""
]
] | We present a simple model in which a brane with anisotropic metric is embedded in an AdS bulk. We discuss the localization of the massless mode and the amplification of both the massless and the massive modes on the branes, paying particular attention to the normalization of the perturbed action and to the evaluation o... |
gr-qc/9910080 | Edward N. Glass | E.N. Glass and J.P. Krisch (Department of Physics, University of
Michigan, Ann Arbor, Michgan) | Schwarzschild Atmospheric Processes: A Classical Path to the Quantum | to appear in Gen. Rel. Grav | Gen.Rel.Grav.32:735-741,2000 | 10.1023/A:1001923320156 | null | gr-qc | null | We develop some classical descriptions for processes in the Schwarzschild
string atmosphere. These processes suggest relationships between macroscopic
and microscopic scales. The classical descriptions developed in this essay
highlight the fundamental quantum nature of the Schwarzschild atmospheric
processes.
| [
{
"created": "Sat, 23 Oct 1999 14:17:04 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Glass",
"E. N.",
"",
"Department of Physics, University of\n Michigan, Ann Arbor, Michgan"
],
[
"Krisch",
"J. P.",
"",
"Department of Physics, University of\n Michigan, Ann Arbor, Michgan"
]
] | We develop some classical descriptions for processes in the Schwarzschild string atmosphere. These processes suggest relationships between macroscopic and microscopic scales. The classical descriptions developed in this essay highlight the fundamental quantum nature of the Schwarzschild atmospheric processes. |
gr-qc/9810057 | Bpt97 | S. I. Tertychniy | Searching for electrovac solutions to Einstein--Maxwell equations with
the help of computer algebra system GRG-EC | 42 pages, no figures, uses amssymb, a4wide, rawfonts macros | null | null | null | gr-qc | null | An example of application of the specialized computer algebra system Grg-EC
to the searching for solutions to the source-free Maxwell and Einstein--Maxwell
equations is demonstrated. The solution involving five arbitrary functions of
two variables is presented in explicit form (up to quadratures). An emphasis is
made... | [
{
"created": "Sun, 18 Oct 1998 07:15:17 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Tertychniy",
"S. I.",
""
]
] | An example of application of the specialized computer algebra system Grg-EC to the searching for solutions to the source-free Maxwell and Einstein--Maxwell equations is demonstrated. The solution involving five arbitrary functions of two variables is presented in explicit form (up to quadratures). An emphasis is made o... |
1707.00169 | Xiao Mei Kuang | Xiao-Mei Kuang, Joel Saavedra and Ali \"Ovg\"un | The Effect of the Gauss-Bonnet term to Hawking Radiation from arbitrary
dimensional Black Brane | 11 pages; version 2,references added; published version | Eur. Phys. J. C (2017) 77:613 | 10.1140/epjc/s10052-017-5191-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the probabilities of the tunneling and the radiation spectrums
of the massive spin-1 particles from arbitrary dimensional Gauss-Bonnet-Axions
(GBA) Anti-de Sitter (AdS) black brane, via using the WKB approximation to the
Proca spin-1 field equation. The tunneling probabilities and Hawking
temperature o... | [
{
"created": "Sat, 1 Jul 2017 15:50:51 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jul 2017 22:26:28 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Sep 2017 21:36:50 GMT",
"version": "v3"
}
] | 2017-09-19 | [
[
"Kuang",
"Xiao-Mei",
""
],
[
"Saavedra",
"Joel",
""
],
[
"Övgün",
"Ali",
""
]
] | We investigate the probabilities of the tunneling and the radiation spectrums of the massive spin-1 particles from arbitrary dimensional Gauss-Bonnet-Axions (GBA) Anti-de Sitter (AdS) black brane, via using the WKB approximation to the Proca spin-1 field equation. The tunneling probabilities and Hawking temperature of ... |
2208.07055 | Umananda Dev Goswami | Dhruba Jyoti Gogoi and Umananda Dev Goswami | Tideless Traversable Wormholes surrounded by cloud of strings in $f(R)$
gravity | 29 pages, 26 figures; Published Version | JCAP 02 (2023) 027 | 10.1088/1475-7516/2023/02/027 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study the tideless traversable wormholes in the $f(R)$ gravity metric
formalism. First we consider three shape functions of wormholes and study their
viabilities and structures. The connection between the $f(R)$ gravity model and
wormhole shape function has been studied and the dependency of the $f(R)$
gravity mod... | [
{
"created": "Mon, 15 Aug 2022 08:03:29 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Feb 2023 06:19:10 GMT",
"version": "v2"
}
] | 2023-02-14 | [
[
"Gogoi",
"Dhruba Jyoti",
""
],
[
"Goswami",
"Umananda Dev",
""
]
] | We study the tideless traversable wormholes in the $f(R)$ gravity metric formalism. First we consider three shape functions of wormholes and study their viabilities and structures. The connection between the $f(R)$ gravity model and wormhole shape function has been studied and the dependency of the $f(R)$ gravity model... |
gr-qc/0212014 | Gabor Kunstatter | Gabor Kunstatter (University of Winnipeg) | d-Dimensional Black Hole Entropy Spectrum from Quasi-Normal Modes | 4 pages, Latex, Revtex4 Some formulas corrected, a reference added | Phys.Rev.Lett.90:161301,2003 | 10.1103/PhysRevLett.90.161301 | null | gr-qc hep-th | null | Starting from recent observations\cite{hod,dreyer1} about quasi-normal modes,
we use semi-classical arguments to derive the Bekenstein-Hawking entropy
spectrum for $d$-dimensional spherically symmetric black holes. We find that
the entropy spectrum is equally spaced: $S_{BH}=k \ln(m_0)n$, where $m_0$ is a
fixed integ... | [
{
"created": "Tue, 3 Dec 2002 16:13:25 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Dec 2002 23:00:08 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Kunstatter",
"Gabor",
"",
"University of Winnipeg"
]
] | Starting from recent observations\cite{hod,dreyer1} about quasi-normal modes, we use semi-classical arguments to derive the Bekenstein-Hawking entropy spectrum for $d$-dimensional spherically symmetric black holes. We find that the entropy spectrum is equally spaced: $S_{BH}=k \ln(m_0)n$, where $m_0$ is a fixed integer... |
gr-qc/9506089 | null | Giampiero Esposito | Singularity Theory in Classical Cosmology | 4 pages, plain-tex, published in Nuovo Cimento B, volume 107, pages
849-851, year 1992 | NuovoCim.B107:849-851,1992 | 10.1007/BF02728572 | DSF 92/6 | gr-qc | null | This paper compares recent approaches appearing in the literature on the
singularity problem for space-times with nonvanishing torsion.
| [
{
"created": "Sat, 1 Jul 1995 19:48:49 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Esposito",
"Giampiero",
""
]
] | This paper compares recent approaches appearing in the literature on the singularity problem for space-times with nonvanishing torsion. |
1612.03172 | Peter Zimmerman | Peter Zimmerman | Horizon instability of extremal Reissner-Nordstr\"om black holes to
charged perturbations | Added appendix on symmetries and QNMs | Phys. Rev. D 95, 124032 (2017) | 10.1103/PhysRevD.95.124032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the stability of highly charged Reissner-Nordstr\"om black
holes to charged scalar perturbations. We show that the near-horizon region
exhibits a transient instability which becomes the Aretakis instability in the
extremal limit. The rates we obtain match the enhanced rates for
nonaxisymmetric perturba... | [
{
"created": "Fri, 9 Dec 2016 21:00:00 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Jan 2017 22:40:51 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Jun 2017 22:08:08 GMT",
"version": "v3"
},
{
"created": "Sat, 30 Sep 2023 10:04:20 GMT",
"version": "v4"
}
] | 2023-10-03 | [
[
"Zimmerman",
"Peter",
""
]
] | We investigate the stability of highly charged Reissner-Nordstr\"om black holes to charged scalar perturbations. We show that the near-horizon region exhibits a transient instability which becomes the Aretakis instability in the extremal limit. The rates we obtain match the enhanced rates for nonaxisymmetric perturbati... |
1001.1753 | Daniel Finley | Daniel Finley and John K. McIver | Solutions of the sDiff(2)Toda equation with SU(2) Symmetry | 27 pages | Class.Quant.Grav.27:145001,2010 | 10.1088/0264-9381/27/14/145001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the general solution to the Plebanski equation for an H-space that
admits Killing vectors for an entire SU(2) of symmetries, which is therefore
also the general solution of the sDiff(2)Toda equation that allows these
symmetries. Desiring these solutions as a bridge toward the future for yet more
general so... | [
{
"created": "Mon, 11 Jan 2010 22:31:36 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Finley",
"Daniel",
""
],
[
"McIver",
"John K.",
""
]
] | We present the general solution to the Plebanski equation for an H-space that admits Killing vectors for an entire SU(2) of symmetries, which is therefore also the general solution of the sDiff(2)Toda equation that allows these symmetries. Desiring these solutions as a bridge toward the future for yet more general solu... |
2111.09331 | Steven Johnston | Steven Johnston | Embedding Causal Sets into Minkowski Spacetime | 22 pages, 7 figures. Minor updates and corrections to match published
version | 2022 Class. Quantum Grav. 39 095006 | 10.1088/1361-6382/ac5922 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new method for embedding a causal set into an interval of
Minkowski spacetime. The method uses spacetime volumes for causally related
elements to define causal set analogs of Minkowski inner products. These are
used to construct matrices of inner products which are then factored using the
singular value ... | [
{
"created": "Wed, 17 Nov 2021 19:00:04 GMT",
"version": "v1"
},
{
"created": "Sun, 15 May 2022 01:43:08 GMT",
"version": "v2"
}
] | 2022-05-17 | [
[
"Johnston",
"Steven",
""
]
] | We present a new method for embedding a causal set into an interval of Minkowski spacetime. The method uses spacetime volumes for causally related elements to define causal set analogs of Minkowski inner products. These are used to construct matrices of inner products which are then factored using the singular value de... |
2010.15795 | Alexandre Le Tiec | Alexandre Le Tiec, Marc Casals, Edgardo Franzin | Tidal Love Numbers of Kerr Black Holes | 65 pages; matches version accepted in Phys. Rev. D | Phys. Rev. D 103, 084021 (2021) | 10.1103/PhysRevD.103.084021 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The open question of whether a Kerr black hole can become tidally deformed or
not has profound implications for fundamental physics and gravitational-wave
astronomy. We consider a Kerr black hole embedded in a weak and slowly varying,
but otherwise arbitrary, multipolar tidal environment. By solving the static
Teukol... | [
{
"created": "Thu, 29 Oct 2020 17:35:07 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Apr 2021 14:28:01 GMT",
"version": "v2"
}
] | 2021-04-15 | [
[
"Tiec",
"Alexandre Le",
""
],
[
"Casals",
"Marc",
""
],
[
"Franzin",
"Edgardo",
""
]
] | The open question of whether a Kerr black hole can become tidally deformed or not has profound implications for fundamental physics and gravitational-wave astronomy. We consider a Kerr black hole embedded in a weak and slowly varying, but otherwise arbitrary, multipolar tidal environment. By solving the static Teukolsk... |
2001.10011 | Vishal Baibhav | Vishal Baibhav, Emanuele Berti, Vitor Cardoso | LISA parameter estimation and source localization with higher harmonics
of the ringdown | 19 pages, 15 figures, 2 tables. v2: references added, replaced Fig. 1 | Phys. Rev. D 101, 084053 (2020) | 10.1103/PhysRevD.101.084053 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | LISA can detect higher harmonics of the ringdown gravitational-wave signal
from massive black-hole binary mergers with large signal-to-noise ratio. The
most massive black-hole binaries are more likely to have electromagnetic
counterparts, and the inspiral will contribute little to their signal-to-noise
ratio. Here we... | [
{
"created": "Mon, 27 Jan 2020 19:00:09 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Jan 2020 22:05:50 GMT",
"version": "v2"
}
] | 2020-04-29 | [
[
"Baibhav",
"Vishal",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Cardoso",
"Vitor",
""
]
] | LISA can detect higher harmonics of the ringdown gravitational-wave signal from massive black-hole binary mergers with large signal-to-noise ratio. The most massive black-hole binaries are more likely to have electromagnetic counterparts, and the inspiral will contribute little to their signal-to-noise ratio. Here we a... |
1312.5478 | Michal Bejger | M. Bejger, A. Kr\'olak | Searching for gravitational waves from known pulsars at once and twice
the spin frequency | 16 pages, 11 figures, CQG accepted | Class. Quantum Grav. 31 105011 (2014) | 10.1088/0264-9381/31/10/105011 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of a superfluid core in the interior of a rotating neutron star
may have an influence on its gravitational wave emission. In addition to the
usually-assumed pure quadrupole radiation with the gravitational wave frequency
at twice the spin frequency, a frequency of rotation itself may also be present
in ... | [
{
"created": "Thu, 19 Dec 2013 11:02:34 GMT",
"version": "v1"
},
{
"created": "Sat, 3 May 2014 09:50:36 GMT",
"version": "v2"
}
] | 2014-05-06 | [
[
"Bejger",
"M.",
""
],
[
"Królak",
"A.",
""
]
] | The existence of a superfluid core in the interior of a rotating neutron star may have an influence on its gravitational wave emission. In addition to the usually-assumed pure quadrupole radiation with the gravitational wave frequency at twice the spin frequency, a frequency of rotation itself may also be present in th... |
1510.03845 | Nicolas Yunes | Nicolas Yunes | Is Einstein Still Right? | 5 pages, no figures. To appear in "Revista Espa\~nola de F\'isica"
(in spanish, en castellano) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is an article commissioned by the Spanish Physics Magazine ("Revista
Espa\~nola de F\'isica") for the Centennial Anniversary of the discovery of
General Relativity. The article reviews experimental and observational efforts
to test Einstein's theory of General Relativity in a variety of scenarios (from
the Solar... | [
{
"created": "Tue, 13 Oct 2015 15:57:57 GMT",
"version": "v1"
}
] | 2015-10-15 | [
[
"Yunes",
"Nicolas",
""
]
] | This is an article commissioned by the Spanish Physics Magazine ("Revista Espa\~nola de F\'isica") for the Centennial Anniversary of the discovery of General Relativity. The article reviews experimental and observational efforts to test Einstein's theory of General Relativity in a variety of scenarios (from the Solar S... |
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