id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1704.08595 | Anna Green | A. C. Green, D. D. Brown, M. Dovale-\'Alvarez, C. Collins, H. Miao, C.
Mow-Lowry, and A. Freise | The Influence of Dual-Recycling on Parametric Instabilities at Advanced
LIGO | 9 pages, 11 figures, 2 ancillary files | A C Green et al 2017 Class. Quantum Grav. 34 205004 | 10.1088/1361-6382/aa8af8 | null | gr-qc astro-ph.IM physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Laser interferometers with high circulating power and suspended optics, such
as the LIGO gravitational wave detectors, experience an optomechanical coupling
effect known as a parametric instability: the runaway excitation of a
mechanical resonance in a mirror driven by the optical field. This can saturate
the interfe... | [
{
"created": "Thu, 27 Apr 2017 14:24:26 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Sep 2017 10:58:48 GMT",
"version": "v2"
}
] | 2017-09-27 | [
[
"Green",
"A. C.",
""
],
[
"Brown",
"D. D.",
""
],
[
"Dovale-Álvarez",
"M.",
""
],
[
"Collins",
"C.",
""
],
[
"Miao",
"H.",
""
],
[
"Mow-Lowry",
"C.",
""
],
[
"Freise",
"A.",
""
]
] | Laser interferometers with high circulating power and suspended optics, such as the LIGO gravitational wave detectors, experience an optomechanical coupling effect known as a parametric instability: the runaway excitation of a mechanical resonance in a mirror driven by the optical field. This can saturate the interfero... |
gr-qc/9608053 | Raphael Bousso | Raphael Bousso (DAMTP, Cambridge) | Charged Nariai Black Holes With a Dilaton | 20 pages, LaTeX, 4 figures, submitted to Phys. Rev. D | Phys.Rev. D55 (1997) 3614-3621 | 10.1103/PhysRevD.55.3614 | DAMTP/R-96/39 | gr-qc hep-th | null | The Reissner-Nordstrom-de Sitter black holes of standard Einstein-Maxwell
theory with a cosmological constant have no analogue in dilatonic theories with
a Liouville potential. The only exception are the solutions of maximal mass,
the Charged Nariai solutions. We show that the structure of the solution space
of the D... | [
{
"created": "Thu, 22 Aug 1996 17:27:18 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Bousso",
"Raphael",
"",
"DAMTP, Cambridge"
]
] | The Reissner-Nordstrom-de Sitter black holes of standard Einstein-Maxwell theory with a cosmological constant have no analogue in dilatonic theories with a Liouville potential. The only exception are the solutions of maximal mass, the Charged Nariai solutions. We show that the structure of the solution space of the Dil... |
2001.10015 | Alexey Golovnev | Alexey Golovnev | Perturbations in f(T) cosmology and the spin connection | 7 pages; minor changes | Journal of Cosmology and Astroparticle Physics, JCAP04(2020)014 | 10.1088/1475-7516/2020/04/014 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this short paper we explain how the spin connection variables should be
introduced into the perturbation theory of the spatially flat cosmology in f(T)
gravity with the background tetrad $e^a_{\mu}=a(t)\cdot\delta^a_{\mu}$ and zero
background spin connection. In passing, we also correct some small mistakes in
our ... | [
{
"created": "Mon, 27 Jan 2020 19:00:56 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Feb 2020 09:24:53 GMT",
"version": "v2"
}
] | 2020-04-20 | [
[
"Golovnev",
"Alexey",
""
]
] | In this short paper we explain how the spin connection variables should be introduced into the perturbation theory of the spatially flat cosmology in f(T) gravity with the background tetrad $e^a_{\mu}=a(t)\cdot\delta^a_{\mu}$ and zero background spin connection. In passing, we also correct some small mistakes in our pr... |
0906.0134 | Henk van Elst | Thomas Buchert (Universit\'e Lyon 1), George F R Ellis (University of
Cape Town), Henk van Elst (Merkur Internationale FH Karlsruhe) | Geometrical order-of-magnitude estimates for spatial curvature in
realistic models of the Universe | 11 pages. Fully hyperlinked. Dedicated to the memory of J\"urgen
Ehlers. To appear in the upcoming Special Issue of "General Relativity and
Gravitation" | Gen.Rel.Grav.41:2017-2030,2009 | 10.1007/s10714-009-0828-4 | null | gr-qc astro-ph.CO math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The thoughts expressed in this article are based on remarks made by J\"urgen
Ehlers at the Albert-Einstein-Institut, Golm, Germany in July 2007. The main
objective of this article is to demonstrate, in terms of plausible
order-of-magnitude estimates for geometrical scalars, the relevance of spatial
curvature in reali... | [
{
"created": "Sun, 31 May 2009 05:28:37 GMT",
"version": "v1"
}
] | 2009-09-28 | [
[
"Buchert",
"Thomas",
"",
"Université Lyon 1"
],
[
"Ellis",
"George F R",
"",
"University of\n Cape Town"
],
[
"van Elst",
"Henk",
"",
"Merkur Internationale FH Karlsruhe"
]
] | The thoughts expressed in this article are based on remarks made by J\"urgen Ehlers at the Albert-Einstein-Institut, Golm, Germany in July 2007. The main objective of this article is to demonstrate, in terms of plausible order-of-magnitude estimates for geometrical scalars, the relevance of spatial curvature in realist... |
0804.4280 | Laura Mersini-Houghton | Laura Mersini-Houghton | Thoughts on Defining the Multiverse | 10 pgs | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The possibility that the multiverse corresponds to physical reality deserves
serious investigation. Having three different important theories,(quantum
mechanics, string theory and inflation), predict the existence of the
multiverse is hardly coincidental. I argue that the existence of the multiverse
must be expected ... | [
{
"created": "Sun, 27 Apr 2008 14:09:13 GMT",
"version": "v1"
}
] | 2008-04-29 | [
[
"Mersini-Houghton",
"Laura",
""
]
] | The possibility that the multiverse corresponds to physical reality deserves serious investigation. Having three different important theories,(quantum mechanics, string theory and inflation), predict the existence of the multiverse is hardly coincidental. I argue that the existence of the multiverse must be expected fr... |
gr-qc/0005076 | Takashi Okamura | Takashi Okamura (Dept. of Phys., Ochanomizu Univ.) | A Comment on Non-Archimedean Character of Quantum Buoyancy | 9 pages, latex, no figures | null | null | OCHA-PP-158 | gr-qc | null | In a gedankenexperiment about the generalized second law (GSL) of black hole
thermodynamics, the buoyant force by black hole atmosphere (the acceleration
radiation) plays an important role, and then it is significant to understand
the nature of the buoyant force.
Recently, Bekenstein criticizes that the fluid appro... | [
{
"created": "Wed, 17 May 2000 04:49:04 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Okamura",
"Takashi",
"",
"Dept. of Phys., Ochanomizu Univ."
]
] | In a gedankenexperiment about the generalized second law (GSL) of black hole thermodynamics, the buoyant force by black hole atmosphere (the acceleration radiation) plays an important role, and then it is significant to understand the nature of the buoyant force. Recently, Bekenstein criticizes that the fluid approxima... |
1409.0014 | Vitor Cardoso | Vitor Cardoso, Leonardo Gualtieri, Carlos Herdeiro, Ulrich Sperhake | Exploring New Physics Frontiers Through Numerical Relativity | 156 pages, 21 figures. Published in Living Reviews in Relativity | null | 10.1007/lrr-2015-1 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The demand to obtain answers to highly complex problems within strong-field
gravity has been met with significant progress in the numerical solution of
Einstein's equations - along with some spectacular results - in various setups.
We review techniques for solving Einstein's equations in generic spacetimes,
focusing ... | [
{
"created": "Fri, 29 Aug 2014 20:00:22 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Sep 2014 12:55:32 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Sep 2015 17:47:25 GMT",
"version": "v3"
}
] | 2015-11-11 | [
[
"Cardoso",
"Vitor",
""
],
[
"Gualtieri",
"Leonardo",
""
],
[
"Herdeiro",
"Carlos",
""
],
[
"Sperhake",
"Ulrich",
""
]
] | The demand to obtain answers to highly complex problems within strong-field gravity has been met with significant progress in the numerical solution of Einstein's equations - along with some spectacular results - in various setups. We review techniques for solving Einstein's equations in generic spacetimes, focusing on... |
1809.07666 | Adam Szereszewski | Jerzy Lewandowski, Adam Szereszewski | Spacetimes foliated by non-expanding null surfaces in the presence of a
cosmological constant | null | Phys. Rev. D 100, 024049 (2019) | 10.1103/PhysRevD.100.024049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that every solution to Einstein's equations with possibly non-zero
cosmological constant that is foliated by non-expanding null surfaces
transversal to a single non-expanding null surface belongs to family of the
near (extremal) horizon geometries. Our results are local, hold in a
neighborhood of the single ... | [
{
"created": "Thu, 20 Sep 2018 15:12:19 GMT",
"version": "v1"
}
] | 2019-07-31 | [
[
"Lewandowski",
"Jerzy",
""
],
[
"Szereszewski",
"Adam",
""
]
] | We prove that every solution to Einstein's equations with possibly non-zero cosmological constant that is foliated by non-expanding null surfaces transversal to a single non-expanding null surface belongs to family of the near (extremal) horizon geometries. Our results are local, hold in a neighborhood of the single no... |
1705.00507 | Sanjeev S. Seahra | Jack Gegenberg and Sanjeev S. Seahra | Gravitational wave defocussing in quadratic gravity | 7 pages, further expanded discussion, matches version published in
CQG | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate that Huygens' principle for gravitational waves fails in
quadratic gravity models that exhibit conformal symmetry at high energies. This
results in the blurring of gravitational wave signals over finite timescales
related to the energy scale of new physics $M_{\star}$. Furthermore, on very
small scales... | [
{
"created": "Mon, 1 May 2017 13:21:40 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Sep 2017 18:39:19 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Jan 2018 12:47:18 GMT",
"version": "v3"
}
] | 2018-01-30 | [
[
"Gegenberg",
"Jack",
""
],
[
"Seahra",
"Sanjeev S.",
""
]
] | We demonstrate that Huygens' principle for gravitational waves fails in quadratic gravity models that exhibit conformal symmetry at high energies. This results in the blurring of gravitational wave signals over finite timescales related to the energy scale of new physics $M_{\star}$. Furthermore, on very small scales t... |
0908.3570 | Claus Kiefer | Anne Franzen, Sashideep Gutti, Claus Kiefer | Quantum Gravitational Collapse in the Lemaitre-Tolman-Bondi Model with a
Positive Cosmological Constant | 17 pages, published version | Class.Quant.Grav.27:015011,2010 | 10.1088/0264-9381/27/1/015011 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Previous papers dealt with the quantization of the Lemaitre-Tolman-Bondi
(LTB) model for vanishing cosmological constant $\Lambda$. Here we extend the
analysis to the case $\Lambda >0$. Our main goal is to present solutions of the
Wheeler-DeWitt equation, to give their interpretation, and to derive Hawking
radiation ... | [
{
"created": "Tue, 25 Aug 2009 08:57:30 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Dec 2009 17:02:53 GMT",
"version": "v2"
}
] | 2010-01-06 | [
[
"Franzen",
"Anne",
""
],
[
"Gutti",
"Sashideep",
""
],
[
"Kiefer",
"Claus",
""
]
] | Previous papers dealt with the quantization of the Lemaitre-Tolman-Bondi (LTB) model for vanishing cosmological constant $\Lambda$. Here we extend the analysis to the case $\Lambda >0$. Our main goal is to present solutions of the Wheeler-DeWitt equation, to give their interpretation, and to derive Hawking radiation fr... |
2206.11434 | Ran Li | Ran Li, Jin Wang | Vacuum decay and bubble nucleation in the anti-de Sitter black holes | null | null | 10.1007/JHEP09(2022)151 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the vacuum decay and the bubble nucleation in the anti-de Sitter
black holes. In the bubble nucleation spacetime, the interior and the exterior
of the bubble wall are described by two anti-de Sitter black hole spacetimes
with different cosmological constants. We calculate the Euclidean action of the
bubble n... | [
{
"created": "Thu, 23 Jun 2022 00:54:44 GMT",
"version": "v1"
}
] | 2022-10-19 | [
[
"Li",
"Ran",
""
],
[
"Wang",
"Jin",
""
]
] | We study the vacuum decay and the bubble nucleation in the anti-de Sitter black holes. In the bubble nucleation spacetime, the interior and the exterior of the bubble wall are described by two anti-de Sitter black hole spacetimes with different cosmological constants. We calculate the Euclidean action of the bubble nuc... |
0811.4103 | Luis Granda | L. N. Granda | Reconstructing the potentials for the quintessence and tachyon dark
energy, from the holographic principle | 21 pages, 18 figures, 2 tables | Int.J.Mod.Phys.D18 2009:1749-1764,2009 | 10.1142/S0218271809015291 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose an holographic quintessence and tachyon models of dark energy. The
correspondence between the quintessence and tachyon energy densities with the
holographic density, allows the reconstruction of the potentials and the
dynamics for the quintessence and tachyon fields, in flat FRW background. The
proposed in... | [
{
"created": "Tue, 25 Nov 2008 14:54:17 GMT",
"version": "v1"
}
] | 2009-11-19 | [
[
"Granda",
"L. N.",
""
]
] | We propose an holographic quintessence and tachyon models of dark energy. The correspondence between the quintessence and tachyon energy densities with the holographic density, allows the reconstruction of the potentials and the dynamics for the quintessence and tachyon fields, in flat FRW background. The proposed infr... |
1703.00779 | \"Amin Baumeler | \"Amin Baumeler, Fabio Costa, Timothy C. Ralph, Stefan Wolf, and
Magdalena Zych | Reversible time travel with freedom of choice | 11 pages, 3 figures | Classical and Quantum Gravity 36, 224002 (2019) | 10.1088/1361-6382/ab4973 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativity allows for the existence of closed time-like curves, along
which a material object could travel back in time and interact with its past
self. This possibility raises the question whether certain initial conditions,
or more generally local operations, lead to inconsistencies and should thus be
forbi... | [
{
"created": "Thu, 2 Mar 2017 13:42:36 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Oct 2019 12:47:08 GMT",
"version": "v2"
}
] | 2019-10-31 | [
[
"Baumeler",
"Ämin",
""
],
[
"Costa",
"Fabio",
""
],
[
"Ralph",
"Timothy C.",
""
],
[
"Wolf",
"Stefan",
""
],
[
"Zych",
"Magdalena",
""
]
] | General relativity allows for the existence of closed time-like curves, along which a material object could travel back in time and interact with its past self. This possibility raises the question whether certain initial conditions, or more generally local operations, lead to inconsistencies and should thus be forbidd... |
gr-qc/9901035 | Shahar Hod | Shahar Hod | Universal Entropy Bound for Rotating Systems | 10 pages | Phys. Rev. D 61, 024018 (2000) | 10.1103/PhysRevD.61.024018 | null | gr-qc hep-th quant-ph | null | We conjecture a universal upper bound to the entropy of a rotating system.
The entropy bound follows from application of the generalized second law of
thermodynamics to an idealized gedanken experiment in which an entropy-bearing
rotating system falls into a black hole. This bound is stronger than the
Bekenstein entr... | [
{
"created": "Wed, 13 Jan 1999 14:06:22 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Dec 1999 07:41:22 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Hod",
"Shahar",
""
]
] | We conjecture a universal upper bound to the entropy of a rotating system. The entropy bound follows from application of the generalized second law of thermodynamics to an idealized gedanken experiment in which an entropy-bearing rotating system falls into a black hole. This bound is stronger than the Bekenstein entrop... |
1401.2667 | Jorma Louko | Lee Hodgkinson, Jorma Louko, Adrian C. Ottewill | Static detectors and circular-geodesic detectors on the Schwarzschild
black hole | 53 pages, several figures. v2: correspondence with [28] clarified.
v3: improved figures, minor clarifications. Published version | Phys. Rev. D 89, 104002 (2014) | 10.1103/PhysRevD.89.104002 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the response of an Unruh-DeWitt particle detector coupled to a
massless scalar field on the (3+1)-dimensional Schwarzschild spacetime, in the
Boulware, Hartle-Hawking and Unruh states, for static detectors and detectors
on circular geodesics, by primarily numerical methods. For the static detector,
the res... | [
{
"created": "Sun, 12 Jan 2014 20:37:00 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Jan 2014 19:28:39 GMT",
"version": "v2"
},
{
"created": "Mon, 5 May 2014 10:57:53 GMT",
"version": "v3"
}
] | 2014-05-06 | [
[
"Hodgkinson",
"Lee",
""
],
[
"Louko",
"Jorma",
""
],
[
"Ottewill",
"Adrian C.",
""
]
] | We examine the response of an Unruh-DeWitt particle detector coupled to a massless scalar field on the (3+1)-dimensional Schwarzschild spacetime, in the Boulware, Hartle-Hawking and Unruh states, for static detectors and detectors on circular geodesics, by primarily numerical methods. For the static detector, the respo... |
2102.08000 | Shiyang Hu | Shiyang Hu, Xin Wu, Enwei Liang | Energy-conserving integrator for conservative Hamiltonian systems with
ten-dimensional phase space | 27 pages, 14 figures | null | 10.3847/1538-4365/abe69d | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | In this paper, an implicit nonsymplectic exact energy-preserving integrator
is specifically designed for a ten-dimensional phase-space conservative
Hamiltonian system with five degrees of freedom. It is based on a suitable
discretization-averaging of the Hamiltonian gradient, with a second-order
accuracy to numerical... | [
{
"created": "Tue, 16 Feb 2021 07:59:05 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Apr 2021 09:03:06 GMT",
"version": "v2"
},
{
"created": "Thu, 15 Apr 2021 00:41:40 GMT",
"version": "v3"
}
] | 2021-04-16 | [
[
"Hu",
"Shiyang",
""
],
[
"Wu",
"Xin",
""
],
[
"Liang",
"Enwei",
""
]
] | In this paper, an implicit nonsymplectic exact energy-preserving integrator is specifically designed for a ten-dimensional phase-space conservative Hamiltonian system with five degrees of freedom. It is based on a suitable discretization-averaging of the Hamiltonian gradient, with a second-order accuracy to numerical s... |
1908.09850 | Axel Polaczek | Steffen Gielen, Axel Polaczek, Edward Wilson-Ewing | Addendum to "Relational Hamiltonian for group field theory" | 4 pages, addendum to arXiv:1810.01259 | Phys. Rev. D 100, 106002 (2019) | 10.1103/PhysRevD.100.106002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this addendum to [Phys. Rev. D 99 (2019) 086017], we extend the
construction of a Hamiltonian formalism to a new class of group field theory
actions with a kinetic term that is local in the group variables and depends
only on their derivatives; such a kinetic term will couple magnetic indices of
opposite sign in t... | [
{
"created": "Mon, 26 Aug 2019 18:00:06 GMT",
"version": "v1"
}
] | 2019-11-13 | [
[
"Gielen",
"Steffen",
""
],
[
"Polaczek",
"Axel",
""
],
[
"Wilson-Ewing",
"Edward",
""
]
] | In this addendum to [Phys. Rev. D 99 (2019) 086017], we extend the construction of a Hamiltonian formalism to a new class of group field theory actions with a kinetic term that is local in the group variables and depends only on their derivatives; such a kinetic term will couple magnetic indices of opposite sign in the... |
gr-qc/0204013 | Peiyong Ji | H. Q. Lu, L. M. Shen, P. Ji, G. F. Ji and N. J. Sun | The classical wormhole solution and wormhole wavefunction with a
nonlinear Born-Infeld scalar field | REVTex, 8 pages, submitted to Class. Quantum Grav | Int.J.Theor.Phys. 42 (2003) 837-844 | null | null | gr-qc | null | On this paper we consider the classical wormhole solution of the Born-Infeld
scalar field. The corresponding classical wormhole solution can be obtained
analytically for both very small and large $\dot{\phi}$. At the extreme limits
of small $\dot{\phi}$ the wormhole solution has the same format as one obtained
by Gid... | [
{
"created": "Wed, 3 Apr 2002 02:54:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lu",
"H. Q.",
""
],
[
"Shen",
"L. M.",
""
],
[
"Ji",
"P.",
""
],
[
"Ji",
"G. F.",
""
],
[
"Sun",
"N. J.",
""
]
] | On this paper we consider the classical wormhole solution of the Born-Infeld scalar field. The corresponding classical wormhole solution can be obtained analytically for both very small and large $\dot{\phi}$. At the extreme limits of small $\dot{\phi}$ the wormhole solution has the same format as one obtained by Giddi... |
gr-qc/0009013 | Miguel Alcubierre | Miguel Alcubierre | The warp drive: hyper-fast travel within general relativity | 10 pages, 1 figure. Not previously available in gr-qc | Class.Quant.Grav.11:L73-L77,1994 | 10.1088/0264-9381/11/5/001 | null | gr-qc | null | It is shown how, within the framework of general relativity and without the
introduction of wormholes, it is possible to modify a spacetime in a way that
allows a spaceship to travel with an arbitrarily large speed. By a purely local
expansion of spacetime behind the spaceship and an opposite contraction in
front of ... | [
{
"created": "Tue, 5 Sep 2000 13:43:24 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Alcubierre",
"Miguel",
""
]
] | It is shown how, within the framework of general relativity and without the introduction of wormholes, it is possible to modify a spacetime in a way that allows a spaceship to travel with an arbitrarily large speed. By a purely local expansion of spacetime behind the spaceship and an opposite contraction in front of it... |
2303.03411 | Jo\~ao Sieiro Dos Santos | Jo\~ao S. Santos, Vitor Cardoso, Jos\'e Nat\'ario | Electromagnetic radiation reaction and energy extraction from black
holes: The tail term cannot be ignored | 7 pages, 1 figure. v2: minor changes, references added, matches final
published version in PRD | null | 10.1103/PhysRevD.107.064046 | null | gr-qc astro-ph.HE hep-th physics.acc-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study electromagnetic radiation reaction in curved space and the dynamics
of radiating charged particles. The equation of motion for such particles is
the DeWitt-Brehme equation, and it contains a particularly complicated,
non-local, tail term. It has been claimed that the tail term can be neglected
in certain mag... | [
{
"created": "Mon, 6 Mar 2023 19:00:02 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Mar 2023 14:01:57 GMT",
"version": "v2"
}
] | 2023-04-05 | [
[
"Santos",
"João S.",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Natário",
"José",
""
]
] | We study electromagnetic radiation reaction in curved space and the dynamics of radiating charged particles. The equation of motion for such particles is the DeWitt-Brehme equation, and it contains a particularly complicated, non-local, tail term. It has been claimed that the tail term can be neglected in certain magne... |
0804.0672 | Claus Kiefer | Claus Kiefer, Barbara Sandhoefer | Quantum Cosmology | 30 pages, 9 figures, published version | Z. Naturforsch. A 77, 543-559 (2022) | 10.1515/zna-2021-0384 | Cologne preprint GR-08/2 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give an introduction into quantum cosmology with emphasis on its
conceptual parts. After a general motivation we review the formalism of
canonical quantum gravity on which discussions of quantum cosmology are usually
based. We then present the minisuperspace Wheeler--DeWitt equation and
elaborate on the problem of... | [
{
"created": "Fri, 4 Apr 2008 09:28:55 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Apr 2008 13:23:01 GMT",
"version": "v2"
},
{
"created": "Thu, 22 Sep 2022 10:01:09 GMT",
"version": "v3"
}
] | 2022-09-23 | [
[
"Kiefer",
"Claus",
""
],
[
"Sandhoefer",
"Barbara",
""
]
] | We give an introduction into quantum cosmology with emphasis on its conceptual parts. After a general motivation we review the formalism of canonical quantum gravity on which discussions of quantum cosmology are usually based. We then present the minisuperspace Wheeler--DeWitt equation and elaborate on the problem of t... |
2003.10686 | Shingo Akama | Shingo Akama, Shin'ichi Hirano, and Tsutomu Kobayashi | Primordial tensor non-Gaussianities from general single-field inflation
with non-Bunch-Davies initial states | 9 pages | Phys. Rev. D 102, 023513 (2020) | 10.1103/PhysRevD.102.023513 | RUP-20-9 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been found that the primordial non-Gaussianity of the curvature
perturbation in the case of non-Bunch-Davies initial states can be enhanced
compared with those in the case of the Bunch-Davies one due to the interactions
among the perturbations on subhorizon scales. The purpose of the present paper
is to invest... | [
{
"created": "Tue, 24 Mar 2020 06:58:14 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Apr 2020 07:46:08 GMT",
"version": "v2"
}
] | 2020-07-15 | [
[
"Akama",
"Shingo",
""
],
[
"Hirano",
"Shin'ichi",
""
],
[
"Kobayashi",
"Tsutomu",
""
]
] | It has been found that the primordial non-Gaussianity of the curvature perturbation in the case of non-Bunch-Davies initial states can be enhanced compared with those in the case of the Bunch-Davies one due to the interactions among the perturbations on subhorizon scales. The purpose of the present paper is to investig... |
1904.05469 | Vladimir Ivashchuk | V. D. Ivashchuk and A. A. Kobtsev | Exponential cosmological solutions with two factor spaces in EGB model
with $\Lambda = 0$ revisited | 21 pages, Latex, 3 figures, revised version, Appendix is added | null | null | IGC-19-04/01rev | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study exact cosmological solutions in $D$-dimensional
Einstein-Gauss-Bonnet model (with zero cosmological term) governed by two
non-zero constants: $\alpha_1$ and $\alpha_2$. We deal with exponential
dependence (in time) of two scale factors governed by Hubble-like parameters $H
> 0$ and $h$, which correspond to f... | [
{
"created": "Wed, 10 Apr 2019 22:37:29 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jul 2019 23:27:02 GMT",
"version": "v2"
}
] | 2019-07-23 | [
[
"Ivashchuk",
"V. D.",
""
],
[
"Kobtsev",
"A. A.",
""
]
] | We study exact cosmological solutions in $D$-dimensional Einstein-Gauss-Bonnet model (with zero cosmological term) governed by two non-zero constants: $\alpha_1$ and $\alpha_2$. We deal with exponential dependence (in time) of two scale factors governed by Hubble-like parameters $H > 0$ and $h$, which correspond to fac... |
gr-qc/0009094 | S. K. Sahay | D.C. Srivastava and S.K. Sahay | Data Analysis of Continuous Gravitational Wave Signal: Fourier Transform | 3 pages | null | null | null | gr-qc | null | We present the Fourier Transform of continuous gravitational wave for
arbitrary location of detector and source and for any duration of observation
time in which both rotational motion of earth about its spin axis and orbital
motion around sun has been taken into account. We also give the method to
account the spin d... | [
{
"created": "Wed, 27 Sep 2000 15:49:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Srivastava",
"D. C.",
""
],
[
"Sahay",
"S. K.",
""
]
] | We present the Fourier Transform of continuous gravitational wave for arbitrary location of detector and source and for any duration of observation time in which both rotational motion of earth about its spin axis and orbital motion around sun has been taken into account. We also give the method to account the spin dow... |
gr-qc/9507029 | Kiyoshi Shiraishi | Kiyoshi Shiraishi (Akita Junior College) | Many-body systems in Einstein-Maxwell-Dilaton theory | 9 pages, FIG.2 not included | Soryushiron Kenkyu (Kyoto) 93 (1996), No. 4, pp. 303-309 | 10.24532/soken.93.4_303 | AJC-HEP-26 | gr-qc | null | We study the interaction of maximally-charged dilatonic black holes at low
velocity. We compute the metric on moduli space for three extreme black holes
under a simple constraint. The Hamiltonian of the multi-black hole system of
$O(v^2)$ is also calculated for the $a=1$ and $a=1/\sqrt{3}$ cases, where $a$
is the dil... | [
{
"created": "Fri, 14 Jul 1995 09:58:19 GMT",
"version": "v1"
}
] | 2020-06-02 | [
[
"Shiraishi",
"Kiyoshi",
"",
"Akita Junior College"
]
] | We study the interaction of maximally-charged dilatonic black holes at low velocity. We compute the metric on moduli space for three extreme black holes under a simple constraint. The Hamiltonian of the multi-black hole system of $O(v^2)$ is also calculated for the $a=1$ and $a=1/\sqrt{3}$ cases, where $a$ is the dilat... |
1305.3390 | Remo Garattini | Remo Garattini and Barun Majumder | Electric Charges and Magnetic Monopoles in Gravity's Rainbow | Updated to match with published version. RevTeX 4, 12 pages | Nucl.Phys. B883 (2014) 598-614 | 10.1016/j.nuclphysb.2014.04.005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we explore the possibility that quantum fluctuations induce an
electric or magnetic charge or both, in the context of Gravity's Rainbow. A
semi-classical approach is adopted, where the graviton one-loop contribution to
a classical energy in a background spacetime is computed through a variational
approa... | [
{
"created": "Wed, 15 May 2013 08:57:37 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Aug 2014 10:47:15 GMT",
"version": "v2"
}
] | 2014-08-21 | [
[
"Garattini",
"Remo",
""
],
[
"Majumder",
"Barun",
""
]
] | In this work, we explore the possibility that quantum fluctuations induce an electric or magnetic charge or both, in the context of Gravity's Rainbow. A semi-classical approach is adopted, where the graviton one-loop contribution to a classical energy in a background spacetime is computed through a variational approach... |
2004.08876 | Mehdi Assanioussi | Mehdi Assanioussi | Graph coherent states for loop quantum gravity | 11 pages | Phys. Rev. D 101, 124022 (2020) | 10.1103/PhysRevD.101.124022 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we further investigate the construction of graph coherent
states, first introduced in [1], in the context of loop quantum gravity. We
specifically investigate the possibility of defining a family of graph coherent
states adapted to the canonical loop quantum gravity Hamiltonian. After
discussing vario... | [
{
"created": "Sun, 19 Apr 2020 15:09:26 GMT",
"version": "v1"
}
] | 2020-07-01 | [
[
"Assanioussi",
"Mehdi",
""
]
] | In this article we further investigate the construction of graph coherent states, first introduced in [1], in the context of loop quantum gravity. We specifically investigate the possibility of defining a family of graph coherent states adapted to the canonical loop quantum gravity Hamiltonian. After discussing various... |
2008.05727 | Rabin Banerjee | Rabin Banerjee | Demystification of Non-relativistic Theories in Curved Background | 5 pages, Essay written for the Gravity Research Foundation 2020
Awards for Essays on Gravitation (Honorable mention) To appear in IJMPD
(special issue) | null | 10.1142/S0218271820430154 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a new formalism for constructing a non-relativistic (NR) theory in
curved background. Named as galilean gauge theory, it is based on gauging the
global galilean symmetry. It provides a systematic algorithm for obtaining the
covariant curved space time generalisation of any NR theory defined in flat
space t... | [
{
"created": "Thu, 13 Aug 2020 07:29:34 GMT",
"version": "v1"
}
] | 2021-02-03 | [
[
"Banerjee",
"Rabin",
""
]
] | We discuss a new formalism for constructing a non-relativistic (NR) theory in curved background. Named as galilean gauge theory, it is based on gauging the global galilean symmetry. It provides a systematic algorithm for obtaining the covariant curved space time generalisation of any NR theory defined in flat space tim... |
1706.08009 | Changjun Gao | Changjun Gao, Youjun Lu, You-Gen Shen and Valerio Faraoni | Pulsation of black holes | 24 pages, 2 figures. GRG accepted | Gen Relativ Gravit (2018) 50:15 | 10.1007/s10714-017-2335-3 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hawking-Penrose singularity theorem states that a singularity forms
inside a black hole in general relativity. To remove this singularity one must
resort to a more fundamental theory. Using a corrected dynamical equation
arising in loop quantum cosmology and braneworld models, we study the
gravitational collapse ... | [
{
"created": "Sat, 24 Jun 2017 22:47:27 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Jun 2017 09:50:54 GMT",
"version": "v2"
},
{
"created": "Fri, 30 Jun 2017 00:43:04 GMT",
"version": "v3"
},
{
"created": "Wed, 8 Nov 2017 05:09:03 GMT",
"version": "v4"
},
{
"cr... | 2018-01-15 | [
[
"Gao",
"Changjun",
""
],
[
"Lu",
"Youjun",
""
],
[
"Shen",
"You-Gen",
""
],
[
"Faraoni",
"Valerio",
""
]
] | The Hawking-Penrose singularity theorem states that a singularity forms inside a black hole in general relativity. To remove this singularity one must resort to a more fundamental theory. Using a corrected dynamical equation arising in loop quantum cosmology and braneworld models, we study the gravitational collapse of... |
1004.1490 | Luis Herrera | L. Herrera, G. Le Denmat, N.O. Santos | Cavity evolution in relativistic self-gravitating fluids | 10 pages Revtex. To appear in Class. Quantum Grav. | Class.Quantum.Grav.27:135017,2010 | 10.1088/0264-9381/27/13/135017 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the evolution of cavities within spherically symmetric
relativistic fluids, under the assumption that proper radial distance between
neighboring fluid elements remains constant during their evolution (purely
areal evolution condition). The general formalism is deployed and solutions are
presented. Some of... | [
{
"created": "Fri, 9 Apr 2010 08:17:45 GMT",
"version": "v1"
}
] | 2015-05-18 | [
[
"Herrera",
"L.",
""
],
[
"Denmat",
"G. Le",
""
],
[
"Santos",
"N. O.",
""
]
] | We consider the evolution of cavities within spherically symmetric relativistic fluids, under the assumption that proper radial distance between neighboring fluid elements remains constant during their evolution (purely areal evolution condition). The general formalism is deployed and solutions are presented. Some of t... |
gr-qc/0007034 | Hisaaki Shinkai | Gen Yoneda and Hisa-aki Shinkai | Hyperbolic formulations and numerical relativity II: Asymptotically
constrained systems of the Einstein equations | 16 pages, RevTeX, 9 eps figures, added Appendix B and minor changes,
to appear in Class. Quant. Grav | Class.Quant.Grav. 18 (2001) 441-462 | 10.1088/0264-9381/18/3/307 | null | gr-qc math-ph math.MP | null | We study asymptotically constrained systems for numerical integration of the
Einstein equations, which are intended to be robust against perturbative errors
for the free evolution of the initial data. First, we examine the previously
proposed "$\lambda$-system", which introduces artificial flows to constraint
surface... | [
{
"created": "Sun, 16 Jul 2000 14:58:26 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Dec 2000 15:09:25 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Yoneda",
"Gen",
""
],
[
"Shinkai",
"Hisa-aki",
""
]
] | We study asymptotically constrained systems for numerical integration of the Einstein equations, which are intended to be robust against perturbative errors for the free evolution of the initial data. First, we examine the previously proposed "$\lambda$-system", which introduces artificial flows to constraint surfaces ... |
2306.09369 | Suratna Das | Suratna Das, Saddam Hussain, Debottam Nandi, Rudnei O. Ramos and
Renato Silva | Stability analysis of warm quintessential dark energy model | 13 pages, 9 figures, double column; v2: several references added,
version matching the published one in the Phys. Rev. D | Phys. Rev. D 108 (2023) 083517 | 10.1103/PhysRevD.108.083517 | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | A dynamical system analysis is performed for a model of dissipative
quintessential inflation realizing warm inflation at early primordial times and
dissipative interations in the dark sector at late times. The construction
makes use of a generalized exponential potential realizing both phases of
accelerated expansion... | [
{
"created": "Wed, 14 Jun 2023 14:00:59 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Oct 2023 13:30:27 GMT",
"version": "v2"
}
] | 2023-10-19 | [
[
"Das",
"Suratna",
""
],
[
"Hussain",
"Saddam",
""
],
[
"Nandi",
"Debottam",
""
],
[
"Ramos",
"Rudnei O.",
""
],
[
"Silva",
"Renato",
""
]
] | A dynamical system analysis is performed for a model of dissipative quintessential inflation realizing warm inflation at early primordial times and dissipative interations in the dark sector at late times. The construction makes use of a generalized exponential potential realizing both phases of accelerated expansion. ... |
2010.16247 | Subenoy Chakraborty | Akash Bose, Subenoy Chakraborty | Cosmic evolution in f(T) gravity theory | null | Mod.Phys.Lett. A 2050296 (2020) | 10.1142/S021773232050296X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper deals with cosmology in modified f(T) gravity theory. With some
phenomenological choices for the function f(T) it is possible to have
cosmological solutions describing different phases of the evolution of the
Universe for the homogeneous and isotropic FLRW model. By proper choice of the
parameters involved ... | [
{
"created": "Thu, 29 Oct 2020 16:23:03 GMT",
"version": "v1"
}
] | 2020-11-03 | [
[
"Bose",
"Akash",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | The paper deals with cosmology in modified f(T) gravity theory. With some phenomenological choices for the function f(T) it is possible to have cosmological solutions describing different phases of the evolution of the Universe for the homogeneous and isotropic FLRW model. By proper choice of the parameters involved in... |
gr-qc/0412128 | Hyerim Noh | J. Hwang and H. Noh | Second order perturbations of a zero-pressure cosmological medium:
Proofs of the relativistic-Newtonian correspondence | 10 pages, no figure | Phys.Rev. D72 (2005) 044011 | 10.1103/PhysRevD.72.044011 | null | gr-qc astro-ph | null | The dynamic world model and its linear perturbations were first studied in
Einstein's gravity. In the system without pressure the relativistic equations
coincide exactly with the later known ones in Newton's gravity. Here we prove
that, except for the gravitational wave contribution, even to the second-order
perturba... | [
{
"created": "Thu, 30 Dec 2004 03:43:32 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jun 2005 07:11:12 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Jul 2005 07:19:32 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Hwang",
"J.",
""
],
[
"Noh",
"H.",
""
]
] | The dynamic world model and its linear perturbations were first studied in Einstein's gravity. In the system without pressure the relativistic equations coincide exactly with the later known ones in Newton's gravity. Here we prove that, except for the gravitational wave contribution, even to the second-order perturbati... |
1212.6426 | Alan Parry PhD | Alan R. Parry | Spherically Symmetric Static States of Wave Dark Matter | 12 pages, 4 figures, 1 table. This update has been made more concise
with much of the preliminary work now simply cited in my thesis. The
resulting extra room allowed me to flesh out the details of the static state
scaling relations. This shorter version better highlights the important
results, but the results ... | null | null | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we present two observations about static spherically symmetric
solutions of the Einstein-Klein-Gordon equations. The first is a comment
extending the well-known result of the existence of static states (i.e.
standing wave solutions) of the Einstein-Klein-Gordon equations. The second
more important obse... | [
{
"created": "Thu, 27 Dec 2012 20:11:12 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Mar 2015 05:50:25 GMT",
"version": "v2"
}
] | 2015-03-09 | [
[
"Parry",
"Alan R.",
""
]
] | In this paper, we present two observations about static spherically symmetric solutions of the Einstein-Klein-Gordon equations. The first is a comment extending the well-known result of the existence of static states (i.e. standing wave solutions) of the Einstein-Klein-Gordon equations. The second more important observ... |
1510.01223 | Benjamin Koch | Crist\'obal Armaza, M\'aximo Ba\~nados, and Benjamin Koch | Can Schwarzschild Black Holes Be Accelerators of Spinning Massive
Particles? | 9 pages, 6 figures | Class.Quant.Grav. 33 (2016) no.10, 105014 | 10.1088/0264-9381/33/10/105014 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that the center-of-mass energy of the collision of two massive
particles following geodesics around a black hole presents a maximum. The
maximum energy increases when the black hole is endowed with spin, and for a
maximally rotating hole this energy blows up, offering, in principle, a unique
probe of fund... | [
{
"created": "Mon, 5 Oct 2015 16:44:31 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Oct 2015 18:39:44 GMT",
"version": "v2"
},
{
"created": "Mon, 14 Mar 2016 15:11:51 GMT",
"version": "v3"
}
] | 2016-05-12 | [
[
"Armaza",
"Cristóbal",
""
],
[
"Bañados",
"Máximo",
""
],
[
"Koch",
"Benjamin",
""
]
] | It is known that the center-of-mass energy of the collision of two massive particles following geodesics around a black hole presents a maximum. The maximum energy increases when the black hole is endowed with spin, and for a maximally rotating hole this energy blows up, offering, in principle, a unique probe of fundam... |
gr-qc/9406030 | Melnikov Vitaly Nikolaevich | V. N. Melnikov, M. Yu. Konstantinov | Integrable Weyl Geometry in Multidimensional Cosmology. Numerical
Investigation | 16 pages. 6 figures available upon request. RGA-CSVR-006/94 | Int.J.Mod.Phys.D4:339-355,1995 | 10.1142/S0218271895000260 | null | gr-qc | null | The evolution of 4-dimensional and (4+d)-dimensional (d=1,2) cosmological
models based on the integrable Weyl geometry are considered numerically both
for empty space-time and for scalar field with non minimal coupling with
gravity.
| [
{
"created": "Fri, 17 Jun 1994 19:24:16 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Melnikov",
"V. N.",
""
],
[
"Konstantinov",
"M. Yu.",
""
]
] | The evolution of 4-dimensional and (4+d)-dimensional (d=1,2) cosmological models based on the integrable Weyl geometry are considered numerically both for empty space-time and for scalar field with non minimal coupling with gravity. |
gr-qc/0703116 | Alejandro Corichi | Alejandro Corichi, Jacobo Diaz-Polo, Enrique Fernandez-Borja | Loop quantum gravity and Planck-size black hole entropy | 21 pages, 5 figures. Contribution to the Proceedings of the NEB XII
International Conference | J.Phys.Conf.Ser.68:012031,2007 | 10.1088/1742-6596/68/1/012031 | IGPG-07/3-1 | gr-qc | null | The Loop Quantum Gravity (LQG) program is briefly reviewed and one of its
main applications, namely the counting of black hole entropy within the
framework is considered. In particular, recent results for Planck size black
holes are reviewed. These results are consistent with an asymptotic linear
relation (that fixes... | [
{
"created": "Thu, 22 Mar 2007 19:44:04 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Corichi",
"Alejandro",
""
],
[
"Diaz-Polo",
"Jacobo",
""
],
[
"Fernandez-Borja",
"Enrique",
""
]
] | The Loop Quantum Gravity (LQG) program is briefly reviewed and one of its main applications, namely the counting of black hole entropy within the framework is considered. In particular, recent results for Planck size black holes are reviewed. These results are consistent with an asymptotic linear relation (that fixes u... |
gr-qc/0607091 | D. Petroff | Marcus Ansorg and David Petroff | Negative Komar Mass of Single Objects in Regular, Asymptotically Flat
Spacetimes | 7 pages, 2 figures, document class iopart. v2: changes made
(including title) to coincide with published version | Class.Quant.Grav. 23 (2006) L81 | 10.1088/0264-9381/23/24/L01 | AEI-2006-057 | gr-qc | null | We study two types of axially symmetric, stationary and asymptotically flat
spacetimes using highly accurate numerical methods. The one type contains a
black hole surrounded by a perfect fluid ring and the other a rigidly rotating
disc of dust surrounded by such a ring. Both types of spacetime are regular
everywhere ... | [
{
"created": "Fri, 21 Jul 2006 13:45:54 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Nov 2006 09:22:39 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Ansorg",
"Marcus",
""
],
[
"Petroff",
"David",
""
]
] | We study two types of axially symmetric, stationary and asymptotically flat spacetimes using highly accurate numerical methods. The one type contains a black hole surrounded by a perfect fluid ring and the other a rigidly rotating disc of dust surrounded by such a ring. Both types of spacetime are regular everywhere (o... |
2301.09345 | Davide Perrone | Alex Kehagias, Davide Perrone, Antonio Riotto, Francesco Riva | Explaining Nonlinearities in Black Hole Ringdowns from Symmetries | 5 pages | null | 10.1103/PhysRevD.108.L021501 | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | It has been recently pointed out that nonlinear effects are necessary to
model the ringdown stage of the gravitational waveform produced by the merger
of two black holes giving rise to a remnant Kerr black hole. We show that this
nonlinear behaviour is explained, both on the qualitative and quantitative
level, by nea... | [
{
"created": "Mon, 23 Jan 2023 10:15:54 GMT",
"version": "v1"
}
] | 2023-07-19 | [
[
"Kehagias",
"Alex",
""
],
[
"Perrone",
"Davide",
""
],
[
"Riotto",
"Antonio",
""
],
[
"Riva",
"Francesco",
""
]
] | It has been recently pointed out that nonlinear effects are necessary to model the ringdown stage of the gravitational waveform produced by the merger of two black holes giving rise to a remnant Kerr black hole. We show that this nonlinear behaviour is explained, both on the qualitative and quantitative level, by near-... |
2107.09919 | Sobhan Kazempour | Shahabeddin M. Aslmarand, Amin Rezaei Akbarieh, Yousef Izadi, Sobhan
Kazempour and Lijing Shao | Cosmological aspects of cubic Galileon massive gravity | null | Phys. Rev. D 104, 083543 - Published 27 October 2021 | 10.1103/PhysRevD.104.083543 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Cubic Galileon massive gravity is a development of de Rham-Gabadadze-Tolly
(dRGT) massive gravity theory is which the space of the Stueckelberg field is
broken. We consider the cubic Galileon term as a scalar field coupled to the
graviton filed. We present a detailed study of the cosmological aspects of this
theory o... | [
{
"created": "Wed, 21 Jul 2021 07:39:50 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Aug 2021 18:54:33 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Oct 2021 20:19:27 GMT",
"version": "v3"
}
] | 2021-11-01 | [
[
"Aslmarand",
"Shahabeddin M.",
""
],
[
"Akbarieh",
"Amin Rezaei",
""
],
[
"Izadi",
"Yousef",
""
],
[
"Kazempour",
"Sobhan",
""
],
[
"Shao",
"Lijing",
""
]
] | Cubic Galileon massive gravity is a development of de Rham-Gabadadze-Tolly (dRGT) massive gravity theory is which the space of the Stueckelberg field is broken. We consider the cubic Galileon term as a scalar field coupled to the graviton filed. We present a detailed study of the cosmological aspects of this theory of ... |
1611.03505 | T. Padmanabhan | T. Padmanabhan | Do We Really Understand the Cosmos? | Invited Review; 28 pages; 1 figure | Comptes Rendus Physique, 18, 275-291 (2017) | 10.1016/j.crhy.2017.02.001 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Our knowledge about the universe has increased tremendously in the last three
decades or so --- thanks to the progress in observations --- but our
understanding has improved very little. There are several fundamental questions
about our universe for which we have no answers within the current,
operationally very succ... | [
{
"created": "Thu, 10 Nov 2016 21:00:06 GMT",
"version": "v1"
}
] | 2017-08-22 | [
[
"Padmanabhan",
"T.",
""
]
] | Our knowledge about the universe has increased tremendously in the last three decades or so --- thanks to the progress in observations --- but our understanding has improved very little. There are several fundamental questions about our universe for which we have no answers within the current, operationally very succes... |
gr-qc/0612019 | Alexei Zayats | Alexander B. Balakin, Alexei E. Zayats | Non-minimal Wu-Yang monopole | 10 pages, no figures, typos corrected | Phys.Lett.B644:294-298,2007 | 10.1016/j.physletb.2006.12.002 | null | gr-qc astro-ph hep-ph hep-th | null | We discuss new exact spherically symmetric static solutions to non-minimally
extended Einstein-Yang-Mills equations. The obtained solution to the Yang-Mills
subsystem is interpreted as a non-minimal Wu-Yang monopole solution. We focus
on the analysis of two classes of the exact solutions to the gravitational
field eq... | [
{
"created": "Sun, 3 Dec 2006 11:22:11 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Dec 2006 13:56:54 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Balakin",
"Alexander B.",
""
],
[
"Zayats",
"Alexei E.",
""
]
] | We discuss new exact spherically symmetric static solutions to non-minimally extended Einstein-Yang-Mills equations. The obtained solution to the Yang-Mills subsystem is interpreted as a non-minimal Wu-Yang monopole solution. We focus on the analysis of two classes of the exact solutions to the gravitational field equa... |
gr-qc/0009005 | Yasusada Nambu | Yasusada Nambu | Back Reaction Problem in the Inflationary Universe | 17 pages | Phys.Rev. D63 (2001) 044013 | 10.1103/PhysRevD.63.044013 | DPNU-00-27 | gr-qc astro-ph | null | We investigate the back reaction of cosmological perturbations on an
inflationary universe using the renormalization-group method. The second-order
zero mode solution which appears by the nonlinearity of the Einstein equation
is regarded as a secular term of a perturbative expansion, we renormalized a
constant of int... | [
{
"created": "Mon, 4 Sep 2000 02:49:37 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Sep 2000 00:03:16 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Sep 2000 03:42:39 GMT",
"version": "v3"
},
{
"created": "Wed, 4 Oct 2000 04:35:25 GMT",
"version": "v4"
}
] | 2009-10-31 | [
[
"Nambu",
"Yasusada",
""
]
] | We investigate the back reaction of cosmological perturbations on an inflationary universe using the renormalization-group method. The second-order zero mode solution which appears by the nonlinearity of the Einstein equation is regarded as a secular term of a perturbative expansion, we renormalized a constant of integ... |
1210.0764 | Guillaume Faye | Luc Blanchet, Alessandra Buonanno, Guillaume Faye | Third post-Newtonian spin-orbit effect in the gravitational radiation
flux of compact binaries | 6 pages; proceeding of the 9th LISA Symposium, Paris | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves contain tail effects that are due to the backscattering
of linear waves in the curved space-time geometry around the source. The
knowledge as well as the accuracy of the two-body inspiraling post-Newtonian
(PN) dynamics and of the gravitational-wave signal has been recently improved,
notably by co... | [
{
"created": "Tue, 2 Oct 2012 13:19:56 GMT",
"version": "v1"
}
] | 2012-10-03 | [
[
"Blanchet",
"Luc",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Faye",
"Guillaume",
""
]
] | Gravitational waves contain tail effects that are due to the backscattering of linear waves in the curved space-time geometry around the source. The knowledge as well as the accuracy of the two-body inspiraling post-Newtonian (PN) dynamics and of the gravitational-wave signal has been recently improved, notably by comp... |
gr-qc/0505004 | Masaru Siino | Masaru Siino | Topology of event horizon in axially symmetric spacetime: Classification
of Maxwell set with symmetry | 27pages, 5 figures | null | null | null | gr-qc | null | The crease set of an event horizon is studied in a spacetime with discrete or
continuous symmetry. It determines possible topologies on spatial sections of
an event horizon. We thereby investigate the classification of stable
topological structure of the crease sets in a spacetime with any symmetry. In
practice, we s... | [
{
"created": "Sun, 1 May 2005 09:30:22 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Siino",
"Masaru",
""
]
] | The crease set of an event horizon is studied in a spacetime with discrete or continuous symmetry. It determines possible topologies on spatial sections of an event horizon. We thereby investigate the classification of stable topological structure of the crease sets in a spacetime with any symmetry. In practice, we sho... |
2202.10713 | Jo\~ao Lu\'is Rosa | Jo\~ao Lu\'is Rosa, A. S. Lob\~ao Jr., and D. Bazeia | Impact of compactlike and asymmetric configurations of thick branes on
the scalar-tensor representation of $f\left(R,T\right)$ gravity | 15 pages, 24 figures, to appear in EPJC | The European Physical Journal C volume 82, Article number: 191
(2022) | 10.1140/epjc/s10052-022-10159-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study braneworld models in generalized $f\left(R,T\right)$
gravity theories where the action depends on a function of the Ricci scalar $R$
and the trace of the stress-energy tensor $T$. We explore the so-called
scalar-tensor representation of the theory, where the dependence on $R$ and $T$
are exchang... | [
{
"created": "Tue, 22 Feb 2022 07:48:12 GMT",
"version": "v1"
}
] | 2022-03-03 | [
[
"Rosa",
"João Luís",
""
],
[
"Lobão",
"A. S.",
"Jr."
],
[
"Bazeia",
"D.",
""
]
] | In this work we study braneworld models in generalized $f\left(R,T\right)$ gravity theories where the action depends on a function of the Ricci scalar $R$ and the trace of the stress-energy tensor $T$. We explore the so-called scalar-tensor representation of the theory, where the dependence on $R$ and $T$ are exchanged... |
1706.02543 | Emmanuil Saridakis | Iver Brevik, {\O}yvind Gr{\o}n, Jaume de Haro, Sergei D. Odintsov,
Emmanuel N. Saridakis | Viscous Cosmology for Early- and Late-Time Universe | 71 pages, Invited Review for Int.J.Mod.Phys. D | Int.J.Mod.Phys. D26 (2017) 1730024 | 10.1142/S0218271817300245 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | From a hydrodynamicist's point of view the inclusion of viscosity concepts in
the macroscopic theory of the cosmic fluid would appear most natural, as an
ideal fluid is after all an abstraction (excluding special cases such as
superconductivity). Making use of modern observational results for the Hubble
parameter plu... | [
{
"created": "Wed, 7 Jun 2017 15:48:04 GMT",
"version": "v1"
}
] | 2017-10-30 | [
[
"Brevik",
"Iver",
""
],
[
"Grøn",
"Øyvind",
""
],
[
"de Haro",
"Jaume",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | From a hydrodynamicist's point of view the inclusion of viscosity concepts in the macroscopic theory of the cosmic fluid would appear most natural, as an ideal fluid is after all an abstraction (excluding special cases such as superconductivity). Making use of modern observational results for the Hubble parameter plus ... |
2301.11619 | Jos\'e Francisco Nu\~no Siles | Gonzalo Morr\'as, Jos\'e Francisco Nu\~no Siles, Juan
Garc\'ia-Bellido, Ester Ruiz Morales, Alexis Men\'endez-V\'azquez, Christos
Karathanasis, Katarina Martinovic, Khun Sang Phukon, Sebastien Clesse, Mario
Mart\'i nez, Mairi Sakellariadou | Analysis of a subsolar-mass compact binary candidate from the second
observing run of Advanced LIGO | 10 pages, 6 figures | Physics of the Dark Universe, Volume 42, December 2023 | 10.1016/j.dark.2023.101285 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform an exhaustive follow-up analysis of a subsolar-mass (SSM)
gravitational wave (GW) candidate reported by Phukon et al. from the second
observing run of Advanced LIGO. This candidate has a reported signal-to-noise
ratio (SNR) of $8.6$ and false alarm rate of $0.41$ yr which are too low to
claim a clear gravi... | [
{
"created": "Fri, 27 Jan 2023 09:43:15 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Jun 2023 10:07:57 GMT",
"version": "v2"
},
{
"created": "Thu, 27 Jul 2023 11:44:29 GMT",
"version": "v3"
}
] | 2023-07-28 | [
[
"Morrás",
"Gonzalo",
""
],
[
"Siles",
"José Francisco Nuño",
""
],
[
"García-Bellido",
"Juan",
""
],
[
"Morales",
"Ester Ruiz",
""
],
[
"Menéndez-Vázquez",
"Alexis",
""
],
[
"Karathanasis",
"Christos",
""
],
[
"Mar... | We perform an exhaustive follow-up analysis of a subsolar-mass (SSM) gravitational wave (GW) candidate reported by Phukon et al. from the second observing run of Advanced LIGO. This candidate has a reported signal-to-noise ratio (SNR) of $8.6$ and false alarm rate of $0.41$ yr which are too low to claim a clear gravita... |
2204.06360 | Valery Nikulin V | Valery V. Nikulin, Maxim A. Krasnov and Sergey G. Rubin | Compact extra dimensions as the source of primordial black holes | 11 pages, 4 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We discuss the model of the primordial black holes formation at the reheating
stage. These small massive black holes appear due to specific properties of the
compact extra dimensions. The latter gives rise the low energy model containing
the effective scalar field potential capable for the domain walls production.
Fo... | [
{
"created": "Wed, 13 Apr 2022 13:15:58 GMT",
"version": "v1"
}
] | 2022-04-14 | [
[
"Nikulin",
"Valery V.",
""
],
[
"Krasnov",
"Maxim A.",
""
],
[
"Rubin",
"Sergey G.",
""
]
] | We discuss the model of the primordial black holes formation at the reheating stage. These small massive black holes appear due to specific properties of the compact extra dimensions. The latter gives rise the low energy model containing the effective scalar field potential capable for the domain walls production. Form... |
2311.03848 | Tanmoy Paul | Shin'ichi Nojiri, Sergei D. Odintsov, Tanmoy Paul | Microscopic interpretation of generalized entropy | PLB Accepted | null | null | null | gr-qc cond-mat.stat-mech hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Generalized entropy, that has been recently proposed, puts all the known and
apparently different entropies like The Tsallis, the R\'{e}nyi, the Barrow, the
Kaniadakis, the Sharma-Mittal and the loop quantum gravity entropy within a
single umbrella. However, the microscopic origin of such generalized entropy as
well ... | [
{
"created": "Tue, 7 Nov 2023 10:02:12 GMT",
"version": "v1"
}
] | 2023-11-08 | [
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Paul",
"Tanmoy",
""
]
] | Generalized entropy, that has been recently proposed, puts all the known and apparently different entropies like The Tsallis, the R\'{e}nyi, the Barrow, the Kaniadakis, the Sharma-Mittal and the loop quantum gravity entropy within a single umbrella. However, the microscopic origin of such generalized entropy as well as... |
2103.10700 | Jibril Ben Achour | Jibril Ben Achour | Proper time reparametrization in cosmology: Mobius symmetry and Kodama
charges | 34 pages, matched the published version in JCAP | null | 10.1088/1475-7516/2021/12/005 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | It has been noticed that for a large class of cosmological models, the gauge
fixing of the time-reparametrization invariance does not completely fix the
clock. Instead, the system enjoys a surprising residual Noether symmetry under
a M\"{o}bius reparametrization of the proper time, which maps
gauge-inequivalent solut... | [
{
"created": "Fri, 19 Mar 2021 09:26:28 GMT",
"version": "v1"
},
{
"created": "Sun, 27 Jun 2021 21:00:50 GMT",
"version": "v2"
},
{
"created": "Thu, 18 Nov 2021 14:52:24 GMT",
"version": "v3"
}
] | 2021-12-15 | [
[
"Achour",
"Jibril Ben",
""
]
] | It has been noticed that for a large class of cosmological models, the gauge fixing of the time-reparametrization invariance does not completely fix the clock. Instead, the system enjoys a surprising residual Noether symmetry under a M\"{o}bius reparametrization of the proper time, which maps gauge-inequivalent solutio... |
gr-qc/9810045 | Fred Cooperstock I. | G. P. Perry and F. I. Cooperstock | Stability of Gravitational and Electromagnetic Geons | 40 pages, 5 EPS figures, uses overcite.sty | Class.Quant.Grav. 16 (1999) 1889-1916 | 10.1088/0264-9381/16/6/321 | null | gr-qc | null | Recent work on gravitational geons is extended to examine the stability
properties of gravitational and electromagnetic geon constructs. All types of
geons must possess the property of regularity, self-consistency and
quasi-stability on a time-scale much longer than the period of the comprising
waves. Standard pertur... | [
{
"created": "Tue, 13 Oct 1998 22:05:39 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Perry",
"G. P.",
""
],
[
"Cooperstock",
"F. I.",
""
]
] | Recent work on gravitational geons is extended to examine the stability properties of gravitational and electromagnetic geon constructs. All types of geons must possess the property of regularity, self-consistency and quasi-stability on a time-scale much longer than the period of the comprising waves. Standard perturba... |
2205.13174 | Shao-Wen Wei | Hui-Min Wang, Zi-Chao Lin, Shao-Wen Wei | Optical appearance of Einstein-{\AE}ther black hole surrounded by thin
disk | 19 pages, 6 figures | null | 10.1016/j.nuclphysb.2022.116026 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In Einstein-{\AE}ther theory, the Lorentz symmetry is locally broken in the
high-energy regime due to the presence of the{\AE}ther field. This shall leave
significant imprint on astronomical observation. In this paper, we investigate
the optical appearance of two types of the static and spherically symmetric
black ho... | [
{
"created": "Thu, 26 May 2022 06:13:55 GMT",
"version": "v1"
}
] | 2022-12-14 | [
[
"Wang",
"Hui-Min",
""
],
[
"Lin",
"Zi-Chao",
""
],
[
"Wei",
"Shao-Wen",
""
]
] | In Einstein-{\AE}ther theory, the Lorentz symmetry is locally broken in the high-energy regime due to the presence of the{\AE}ther field. This shall leave significant imprint on astronomical observation. In this paper, we investigate the optical appearance of two types of the static and spherically symmetric black hole... |
1810.03826 | Yunlong Zheng | Yunlong Zheng | Hamiltonian analysis of Mimetic gravity with higher derivatives | 24 pages, comments are welcome | JHEP01(2021)085 | 10.1007/JHEP01(2021)085 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two types of mimetic gravity models with higher derivatives of the mimetic
field are analyzed in the Hamiltonian formalism. For the first type of mimetic
gravity, the Ricci scalar only couples to the mimetic field and we demonstrate
the number of degrees of freedom (DOFs) is three. Then in both Einstein frame
and Jor... | [
{
"created": "Tue, 9 Oct 2018 06:13:54 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Aug 2019 16:55:55 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Oct 2020 06:59:44 GMT",
"version": "v3"
}
] | 2021-01-18 | [
[
"Zheng",
"Yunlong",
""
]
] | Two types of mimetic gravity models with higher derivatives of the mimetic field are analyzed in the Hamiltonian formalism. For the first type of mimetic gravity, the Ricci scalar only couples to the mimetic field and we demonstrate the number of degrees of freedom (DOFs) is three. Then in both Einstein frame and Jorda... |
1006.3081 | Vitor Cardoso | Helvi Witek, Miguel Zilhao, Leonardo Gualtieri, Vitor Cardoso, Carlos
Herdeiro, Andrea Nerozzi, Ulrich Sperhake | Numerical relativity for D dimensional space-times: head-on collisions
of black holes and gravitational wave extraction | 31 pages, 12 figures, RevTex4. v2: Published version. Further details
can be found at http://blackholes.ist.utl.pt/ | Phys.Rev.D82:104014,2010 | 10.1103/PhysRevD.82.104014 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black objects in higher dimensional space-times have a remarkably richer
structure than their four dimensional counterparts. They appear in a variety of
configurations (e.g. black holes, black branes, black rings, black Saturns),
and display complex stability phase diagrams. They might also play a key role
in high en... | [
{
"created": "Tue, 15 Jun 2010 20:04:11 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Nov 2010 13:39:26 GMT",
"version": "v2"
}
] | 2010-11-23 | [
[
"Witek",
"Helvi",
""
],
[
"Zilhao",
"Miguel",
""
],
[
"Gualtieri",
"Leonardo",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Herdeiro",
"Carlos",
""
],
[
"Nerozzi",
"Andrea",
""
],
[
"Sperhake",
"Ulrich",
""
]
] | Black objects in higher dimensional space-times have a remarkably richer structure than their four dimensional counterparts. They appear in a variety of configurations (e.g. black holes, black branes, black rings, black Saturns), and display complex stability phase diagrams. They might also play a key role in high ener... |
gr-qc/0108062 | Jorge Pullin | Rodolfo Gambini and Jorge Pullin | Consistent discretizations for classical and quantum general relativity | 4 pages, RevTeX, no figures | In "Gravity, astrophysics and strings @ the Black Sea", P. Fiziev,
M. Todorov editors, St Kliment Ohridski University Press (2003) | null | LSU-GRG-082401 | gr-qc | null | We consider discretizations of the Einstein action of general relativity such
that the resulting discrete equations of motion form a consistent constrained
system. Upon ``spin foam'' quantization of the system, consistency allows a
natural way of recovering the correct semi-classical theory. A consistent set
of appro... | [
{
"created": "Fri, 24 Aug 2001 20:10:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We consider discretizations of the Einstein action of general relativity such that the resulting discrete equations of motion form a consistent constrained system. Upon ``spin foam'' quantization of the system, consistency allows a natural way of recovering the correct semi-classical theory. A consistent set of approxi... |
1512.07076 | Orlando Luongo | Orlando Luongo, Giovanni Battista Pisani, Antonio Troisi | Cosmological degeneracy versus cosmography: a cosmographic dark energy
model | 10 pages, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we use cosmography to alleviate the degeneracy among
cosmological models, proposing a way to parameterize matter and dark energy in
terms of cosmokinematics quantities. The recipe of using cosmography allows to
expand observable quantities in Taylor series and to directly compare those
expansions with da... | [
{
"created": "Tue, 22 Dec 2015 13:22:54 GMT",
"version": "v1"
}
] | 2015-12-23 | [
[
"Luongo",
"Orlando",
""
],
[
"Pisani",
"Giovanni Battista",
""
],
[
"Troisi",
"Antonio",
""
]
] | In this work we use cosmography to alleviate the degeneracy among cosmological models, proposing a way to parameterize matter and dark energy in terms of cosmokinematics quantities. The recipe of using cosmography allows to expand observable quantities in Taylor series and to directly compare those expansions with data... |
gr-qc/0412097 | Valery Kiselev | V.V.Kiselev | Radial geodesics as a microscopic origin of black hole entropy. II:
Features of Reissner--Nordstrom black hole | 10 pages, 6 eps-figures, iopart class, acknowledgement extended | null | null | null | gr-qc astro-ph hep-th | null | The entropy of charged black hole is calculated by using the partition
function evaluated at radial geodesics confined under horizons. We establish
two quantum phase states inside the black hole and a transition between them.
| [
{
"created": "Tue, 21 Dec 2004 08:56:48 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jan 2005 09:31:16 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kiselev",
"V. V.",
""
]
] | The entropy of charged black hole is calculated by using the partition function evaluated at radial geodesics confined under horizons. We establish two quantum phase states inside the black hole and a transition between them. |
1305.4685 | Edward Anderson | Edward Anderson | Machian Classical and Semiclassical Emergent Time | Replaced with somewhat shorter version Accepted for publication in
Class. Quant. Grav | Class. Quant. Grav 31 (2014) 025006 | 10.1088/0264-9381/31/2/025006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Classical and semiclassical schemes are presented that are timeless at the
primary level and recover time from Mach's `time is to be abstracted from
change' principle at the emergent secondary level. The semiclassical scheme is
a Machian variant of the Semiclassical Approach to the Problem of Time in
Quantum Gravity.... | [
{
"created": "Tue, 21 May 2013 00:48:00 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Nov 2013 02:29:26 GMT",
"version": "v2"
}
] | 2015-06-16 | [
[
"Anderson",
"Edward",
""
]
] | Classical and semiclassical schemes are presented that are timeless at the primary level and recover time from Mach's `time is to be abstracted from change' principle at the emergent secondary level. The semiclassical scheme is a Machian variant of the Semiclassical Approach to the Problem of Time in Quantum Gravity. T... |
1201.6087 | Georgios Chrysostomou | Paschalis G. Paschali, Georgios C. Chrysostomou | Properties of the Spatial Sections of the Space-Time of a Rotating
System | 12 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the symmetry group of the geodesic equations of the spatial
solutions of the space-time generated by a noninertial rotating system of
reference. It is a seven dimensional Lie group, which is neither solvable nor
nilpotent. The variational symmetries form a five dimensional solvable
subgroup. Using the symple... | [
{
"created": "Sun, 29 Jan 2012 21:51:39 GMT",
"version": "v1"
}
] | 2012-01-31 | [
[
"Paschali",
"Paschalis G.",
""
],
[
"Chrysostomou",
"Georgios C.",
""
]
] | We study the symmetry group of the geodesic equations of the spatial solutions of the space-time generated by a noninertial rotating system of reference. It is a seven dimensional Lie group, which is neither solvable nor nilpotent. The variational symmetries form a five dimensional solvable subgroup. Using the symplect... |
2005.12684 | Rafael Ruggiero | Rafael Ruggiero | Big Rip: heating by Hawking radiation and a possible connection to
conformal cyclic cosmology | 4 pages, 1 figure. v2: minor change to make it more explicit that the
cosmological back-reaction of Hawking radiation is assumed to not
qualitatively change the final state of the phantom universe in our analysis | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the Big Rip cosmological scenario, a FRW universe containing dark energy
with $w < -1$ in its equation of state (phantom energy) expands in such way
that, in a finite time span, the scale factor diverges to infinity and the size
of the cosmic horizon goes to zero. Here we revisit this scenario in light of
the fact... | [
{
"created": "Sun, 24 May 2020 23:01:21 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jul 2020 02:36:10 GMT",
"version": "v2"
}
] | 2020-07-07 | [
[
"Ruggiero",
"Rafael",
""
]
] | In the Big Rip cosmological scenario, a FRW universe containing dark energy with $w < -1$ in its equation of state (phantom energy) expands in such way that, in a finite time span, the scale factor diverges to infinity and the size of the cosmic horizon goes to zero. Here we revisit this scenario in light of the fact t... |
1611.05716 | Paul Frampton | Paul H Frampton | Cyclic Period in the CBE Model | 6 pages LaTeX. This recycles the earlier part of
1503.03121(unpublished) whose later part and title were indefensible
speculation | null | 10.1142/S0217732317501322 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a cyclic entropy model in which the extroverse is jettisoned at turnaround
with a Come Back Empty (CBE) assumption, we address matching of the contaction
scale factor $\hat{a}(t)=f(t_T){a}(t)$ to the expansion scale factor $a(t)$,
where $f(t_T)$ is the ratio at turnaround of the introverse to extroverse
radii. Suc... | [
{
"created": "Sun, 13 Nov 2016 23:18:36 GMT",
"version": "v1"
}
] | 2017-08-16 | [
[
"Frampton",
"Paul H",
""
]
] | In a cyclic entropy model in which the extroverse is jettisoned at turnaround with a Come Back Empty (CBE) assumption, we address matching of the contaction scale factor $\hat{a}(t)=f(t_T){a}(t)$ to the expansion scale factor $a(t)$, where $f(t_T)$ is the ratio at turnaround of the introverse to extroverse radii. Such ... |
1405.7324 | Peter Kazinski | I.S. Kalinichenko, P.O. Kazinski | Non-perturbative corrections to the one-loop free energy induced by a
massive scalar field on a stationary slowly varying in space gravitational
background | 46 pp; some misprints corrected, elucidations added | JHEP 1408, 111 (2014) | 10.1007/JHEP08(2014)111 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The explicit expressions for the one-loop non-perturbative corrections to the
gravitational effective action induced by a scalar field on a stationary
gravitational background are obtained both at zero and finite temperatures. The
perturbative and non-perturbative contributions to the one-loop effective
action are ex... | [
{
"created": "Wed, 28 May 2014 18:31:57 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Jun 2014 14:08:23 GMT",
"version": "v2"
}
] | 2014-09-09 | [
[
"Kalinichenko",
"I. S.",
""
],
[
"Kazinski",
"P. O.",
""
]
] | The explicit expressions for the one-loop non-perturbative corrections to the gravitational effective action induced by a scalar field on a stationary gravitational background are obtained both at zero and finite temperatures. The perturbative and non-perturbative contributions to the one-loop effective action are expl... |
1811.11458 | Lucrezia Ravera | Dietmar Silke Klemm, Lucrezia Ravera | Einstein manifolds with torsion and nonmetricity | 27 pages, Accepted for publication in Phys. Rev. D | Phys. Rev. D 101, 044011 (2020) | 10.1103/PhysRevD.101.044011 | IFUM-1070-FT | gr-qc hep-th math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Manifolds endowed with torsion and nonmetricity are interesting both from the
physical and the mathematical points of view. In this paper, we generalize some
results presented in the literature. We study Einstein manifolds (i.e.,
manifolds whose symmetrized Ricci tensor is proportional to the metric) in d
dimensions ... | [
{
"created": "Wed, 28 Nov 2018 09:24:05 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Feb 2020 13:59:08 GMT",
"version": "v2"
}
] | 2020-02-19 | [
[
"Klemm",
"Dietmar Silke",
""
],
[
"Ravera",
"Lucrezia",
""
]
] | Manifolds endowed with torsion and nonmetricity are interesting both from the physical and the mathematical points of view. In this paper, we generalize some results presented in the literature. We study Einstein manifolds (i.e., manifolds whose symmetrized Ricci tensor is proportional to the metric) in d dimensions wi... |
1809.03172 | Tao Zhu | Qiang Wu, Tao Zhu, and Anzhong Wang | Non-adiabatic Evolution of Primordial Perturbations and non-Gaussinity
in Hybrid Approach of Loop Quantum Cosmology | 14 pages, 7 figures, 1 table, version to be published in Physical
Review D | Phys. Rev. D 98, 103528 (2018) | 10.1103/PhysRevD.98.103528 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While loop quantum cosmology (LQC) predicts a robust quantum bounce of the
background evolution of a Friedmann-Robertson-Walker (FRW) spacetime prior to
the standard slow-roll inflation, whereby the big bang singularity is resolved,
there are several different quantization procedures to cosmological
perturbations, fo... | [
{
"created": "Mon, 10 Sep 2018 08:16:12 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Nov 2018 08:17:55 GMT",
"version": "v2"
}
] | 2018-12-05 | [
[
"Wu",
"Qiang",
""
],
[
"Zhu",
"Tao",
""
],
[
"Wang",
"Anzhong",
""
]
] | While loop quantum cosmology (LQC) predicts a robust quantum bounce of the background evolution of a Friedmann-Robertson-Walker (FRW) spacetime prior to the standard slow-roll inflation, whereby the big bang singularity is resolved, there are several different quantization procedures to cosmological perturbations, for ... |
1105.5811 | Rebecca Grossman | Rebecca Grossman, Janna Levin and Gabe Perez-Giz | The harmonic structure of generic Kerr orbits | 14 pages, 8 figures. Submitted to Phys. Rev. D | null | 10.1103/PhysRevD.85.023012 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Generic Kerr orbits exhibit intricate three-dimensional motion. We offer a
classification scheme for these intricate orbits in terms of periodic orbits.
The crucial insight is that for a given effective angular momentum $L$ and
angle of inclination $\iota$, there exists a discrete set of orbits that are
geometrically... | [
{
"created": "Sun, 29 May 2011 18:14:46 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Grossman",
"Rebecca",
""
],
[
"Levin",
"Janna",
""
],
[
"Perez-Giz",
"Gabe",
""
]
] | Generic Kerr orbits exhibit intricate three-dimensional motion. We offer a classification scheme for these intricate orbits in terms of periodic orbits. The crucial insight is that for a given effective angular momentum $L$ and angle of inclination $\iota$, there exists a discrete set of orbits that are geometrically $... |
2204.10988 | Hemwati Nandan | Shobhit Giri, Hemwati Nandan, Lokesh Kumar Joshi and Sunil D. Maharaj | Stability analysis of circular orbits around a traversable wormhole with
massless conformally coupled scalar field | null | Eur. Phys. J. C 82:298 (2022) | 10.1140/epjc/s10052-022-10274-4 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We study the stability of circular orbits in the background of a traversable
wormhole (TWH) spacetime obtained as a solution of Einstein's field equations
coupled conformally to a massless scalar field. The Lyapunov stability approach
is employed to determine the stability of circular orbits (timelike and null)
of no... | [
{
"created": "Sat, 23 Apr 2022 04:12:04 GMT",
"version": "v1"
}
] | 2022-04-26 | [
[
"Giri",
"Shobhit",
""
],
[
"Nandan",
"Hemwati",
""
],
[
"Joshi",
"Lokesh Kumar",
""
],
[
"Maharaj",
"Sunil D.",
""
]
] | We study the stability of circular orbits in the background of a traversable wormhole (TWH) spacetime obtained as a solution of Einstein's field equations coupled conformally to a massless scalar field. The Lyapunov stability approach is employed to determine the stability of circular orbits (timelike and null) of non-... |
2107.11730 | Ethan Payne | Ethan Payne, Ling Sun, Kyle Kremer, Paul D. Lasky, Eric Thrane | The imprint of superradiance on hierarchical black hole mergers | 20 pages, 7 figures | null | 10.3847/1538-4357/ac66df | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Ultralight bosons are a proposed solution to outstanding problems in
cosmology and particle physics: they provide a dark-matter candidate while
potentially explaining the strong charge-parity problem. If they exist,
ultralight bosons can interact with black holes through the superradiant
instability. In this work we ... | [
{
"created": "Sun, 25 Jul 2021 05:33:22 GMT",
"version": "v1"
}
] | 2022-06-01 | [
[
"Payne",
"Ethan",
""
],
[
"Sun",
"Ling",
""
],
[
"Kremer",
"Kyle",
""
],
[
"Lasky",
"Paul D.",
""
],
[
"Thrane",
"Eric",
""
]
] | Ultralight bosons are a proposed solution to outstanding problems in cosmology and particle physics: they provide a dark-matter candidate while potentially explaining the strong charge-parity problem. If they exist, ultralight bosons can interact with black holes through the superradiant instability. In this work we ex... |
2312.00735 | Adrian Helmling-Cornell | Adrian Helmling-Cornell, Philippe Nguyen, Robert Schofield, Raymond
Frey | Automated Evaluation of Environmental Coupling for Advanced LIGO
Gravitational Wave Detections | 26 pages, 9 figures. Copy of accepted manuscript | Classical and Quantum Gravity 41 (2024) | 10.1088/1361-6382/ad5139 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The extreme sensitivity required for direct observation of gravitational
waves by the Advanced LIGO detectors means that environmental noise is
increasingly likely to contaminate Advanced LIGO gravitational wave signals if
left unaddressed. Consequently, environmental monitoring efforts have been
undertaken and novel... | [
{
"created": "Fri, 1 Dec 2023 17:14:26 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jun 2024 22:57:59 GMT",
"version": "v2"
}
] | 2024-06-25 | [
[
"Helmling-Cornell",
"Adrian",
""
],
[
"Nguyen",
"Philippe",
""
],
[
"Schofield",
"Robert",
""
],
[
"Frey",
"Raymond",
""
]
] | The extreme sensitivity required for direct observation of gravitational waves by the Advanced LIGO detectors means that environmental noise is increasingly likely to contaminate Advanced LIGO gravitational wave signals if left unaddressed. Consequently, environmental monitoring efforts have been undertaken and novel n... |
gr-qc/0412090 | Valery Kiselev | V.V.Kiselev | Radial geodesics as a microscopic origin of black hole entropy. I:
Confined under the Schwarzschild horizon | 16 pages, 12 eps-figures, iopart class, tought experiment (p.7) added | Phys.Rev. D72 (2005) 124011 | 10.1103/PhysRevD.72.124011 | null | gr-qc astro-ph hep-th | null | Causal radial geodesics with a positive interval in the Schwarzschild metric
include a subset of trajectories completely confined under a horizon, which
compose a thermal statistical ensemble with the Hawking-Gibbons temperature.
The Bekenstein--Hawking entropy is given by an action at corresponding
geodesics of part... | [
{
"created": "Sun, 19 Dec 2004 08:19:28 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jan 2005 09:29:19 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Feb 2005 13:38:30 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Kiselev",
"V. V.",
""
]
] | Causal radial geodesics with a positive interval in the Schwarzschild metric include a subset of trajectories completely confined under a horizon, which compose a thermal statistical ensemble with the Hawking-Gibbons temperature. The Bekenstein--Hawking entropy is given by an action at corresponding geodesics of partic... |
1610.08099 | Behzad Tajahmad | Behzad Tajahmad | Noether Symmetries of a Modified Model in Teleparallel Gravity and a New
Approach for Exact Solutions | null | null | 10.1140/epjc/s10052-017-4790-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have presented the Noether symmetries of flat FRW spacetime
in the context of a new action in Teleparallel Gravity which we construct it
based on $f(R)$ version. This modified action contains a coupling between
scalar field potential and magnetism. Also, we introduce an innovative approach
(B.N.S. A... | [
{
"created": "Tue, 25 Oct 2016 21:36:39 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Oct 2016 03:27:16 GMT",
"version": "v2"
},
{
"created": "Sun, 26 Mar 2017 10:32:24 GMT",
"version": "v3"
}
] | 2017-04-26 | [
[
"Tajahmad",
"Behzad",
""
]
] | In this paper, we have presented the Noether symmetries of flat FRW spacetime in the context of a new action in Teleparallel Gravity which we construct it based on $f(R)$ version. This modified action contains a coupling between scalar field potential and magnetism. Also, we introduce an innovative approach (B.N.S. App... |
gr-qc/0510078 | Bojan Losic | B. Losic and W.G. Unruh | Long-wavelength metric backreactions in slow-roll inflation | Submitted to Phys. Rev. D | Phys.Rev. D72 (2005) 123510 | 10.1103/PhysRevD.72.123510 | null | gr-qc | null | We examine the importance of second order corrections to linearized
cosmological perturbation theory in an inflationary background, taken to be a
spatially flat FRW spacetime. The full second order problem is solved in the
sense that we evaluate the effect of the superhorizon second order corrections
on the inhomogen... | [
{
"created": "Sun, 16 Oct 2005 22:23:08 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Losic",
"B.",
""
],
[
"Unruh",
"W. G.",
""
]
] | We examine the importance of second order corrections to linearized cosmological perturbation theory in an inflationary background, taken to be a spatially flat FRW spacetime. The full second order problem is solved in the sense that we evaluate the effect of the superhorizon second order corrections on the inhomogeneo... |
2001.07382 | Elena Kopteva | Elena Kopteva, Irina Bormotova, Maria Churilova and Zdenek Stuchlik | Accelerated Expansion of the Universe in the Model with Non-Uniform
Pressure | null | ApJ 887 98 (2019) | 10.3847/1538-4357/ab4f7f | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the particular case of the Stephani solution for shear-free
perfect fluid with uniform energy density and non-uniform pressure. Such models
appeared as possible alternative to the consideration of the exotic forms of
matter like dark energy that would cause the acceleration of the universe
expansion. These... | [
{
"created": "Tue, 21 Jan 2020 08:32:22 GMT",
"version": "v1"
}
] | 2020-01-22 | [
[
"Kopteva",
"Elena",
""
],
[
"Bormotova",
"Irina",
""
],
[
"Churilova",
"Maria",
""
],
[
"Stuchlik",
"Zdenek",
""
]
] | We present the particular case of the Stephani solution for shear-free perfect fluid with uniform energy density and non-uniform pressure. Such models appeared as possible alternative to the consideration of the exotic forms of matter like dark energy that would cause the acceleration of the universe expansion. These m... |
2402.07488 | Marc Mars | Marc Mars | Abstract null geometry, energy-momentum map and applications to the
constraint tensor | 34 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce and study the notion of null manifold. This is a smooth manifold
${\mathcal N}$ endowed with a degenerate metric $\gamma$ with one-dimensional
radical at every point. We also define the notion of ruled null manifold, which
is a special case of null manifolds. We prove that ruled null manifolds are in
one... | [
{
"created": "Mon, 12 Feb 2024 08:55:55 GMT",
"version": "v1"
}
] | 2024-02-13 | [
[
"Mars",
"Marc",
""
]
] | We introduce and study the notion of null manifold. This is a smooth manifold ${\mathcal N}$ endowed with a degenerate metric $\gamma$ with one-dimensional radical at every point. We also define the notion of ruled null manifold, which is a special case of null manifolds. We prove that ruled null manifolds are in one-t... |
0810.3330 | Giovanni Petri | G. Petri | A Diagrammatic Approach to Scalar Field Correlators during Inflation | 10 pages, 7 figures, acknoledgments added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a self-interacting scalar field in a de Sitter background and
deal with the associated infrared divergences in a purely diagrammatic way
using the in-in formalism. In the particular case of a large N O(N) invariant
scalar field theory with quartic self-interactions we recover the result that
the connected... | [
{
"created": "Sat, 18 Oct 2008 17:47:18 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Oct 2008 17:09:01 GMT",
"version": "v2"
}
] | 2008-10-21 | [
[
"Petri",
"G.",
""
]
] | We consider a self-interacting scalar field in a de Sitter background and deal with the associated infrared divergences in a purely diagrammatic way using the in-in formalism. In the particular case of a large N O(N) invariant scalar field theory with quartic self-interactions we recover the result that the connected f... |
1104.1657 | Miguel Socolovsky | Guillermo D'Olivo and Miguel Socolovsky | Poincar\'e gauge invariance of general relativity and Einstein-Cartan
theory | 11 pages, no figures | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a simple proof of the Poincar\'e gauge invariance of general
relativity and Einstein-Cartan theory, in the context of the corresponding
bundle of affine frames.
| [
{
"created": "Fri, 8 Apr 2011 22:36:59 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Apr 2011 06:04:09 GMT",
"version": "v2"
}
] | 2011-04-13 | [
[
"D'Olivo",
"Guillermo",
""
],
[
"Socolovsky",
"Miguel",
""
]
] | We present a simple proof of the Poincar\'e gauge invariance of general relativity and Einstein-Cartan theory, in the context of the corresponding bundle of affine frames. |
gr-qc/9410024 | null | R. M. Avakian and G. Oganessyan | A New Formula for the Mass of a Stationary Axisymmetric Configuration | Plain Tex; 6 pages | Mod.Phys.Lett. A10 (1995) 841-844 | 10.1142/S0217732395000909 | null | gr-qc | null | It has been shown by one of the authors$^1$ that in isotropic spherical
coordinates there is a relation between the mass of a static spherical
gravitating body and the pressure distribution inside it. In this paper the
result is generalized for the case of stationary axisymmetric configurations.
| [
{
"created": "Mon, 17 Oct 1994 11:17:00 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Avakian",
"R. M.",
""
],
[
"Oganessyan",
"G.",
""
]
] | It has been shown by one of the authors$^1$ that in isotropic spherical coordinates there is a relation between the mass of a static spherical gravitating body and the pressure distribution inside it. In this paper the result is generalized for the case of stationary axisymmetric configurations. |
0904.3296 | Sergey Tarabrin | Sergey P. Tarabrin and Sergey P. Vyatchanin | Double Michelson/Fabry-Perot interferometer for laser- and
displacement-noise-free gravitational-wave detection | 12 pages, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we demonstrate that a double Michelson interferometer with
Fabry-Perot cavities in its arms is able to perform laser- and
displacement-noise-free gravitational-wave (GW) detection if certain model
assumptions are met. Assuming the input mirrors of a single
Michelson/Fabry-Perot interferometer can be rig... | [
{
"created": "Tue, 21 Apr 2009 17:13:57 GMT",
"version": "v1"
}
] | 2009-04-22 | [
[
"Tarabrin",
"Sergey P.",
""
],
[
"Vyatchanin",
"Sergey P.",
""
]
] | In this paper we demonstrate that a double Michelson interferometer with Fabry-Perot cavities in its arms is able to perform laser- and displacement-noise-free gravitational-wave (GW) detection if certain model assumptions are met. Assuming the input mirrors of a single Michelson/Fabry-Perot interferometer can be rigid... |
1503.03435 | Geraint Pratten | Geraint Pratten | Covariant Perturbations of f(R) Black Holes: The Weyl Terms | 20 pages. 1 Figure. Published in CQG | Class. Quantum Grav. 32 (2015) 165018 | 10.1088/0264-9381/32/16/165018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we revisit non-spherical perturbations of the Schwarzschild
black hole in the context of $f(R)$ gravity. Previous studies were able to
demonstrate the stability of the $f(R)$ Schwarzschild black hole against
gravitational perturbations in both the even and odd parity sectors. In
particular, it was seen ... | [
{
"created": "Wed, 11 Mar 2015 18:19:46 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Aug 2015 14:39:13 GMT",
"version": "v2"
}
] | 2015-08-04 | [
[
"Pratten",
"Geraint",
""
]
] | In this paper we revisit non-spherical perturbations of the Schwarzschild black hole in the context of $f(R)$ gravity. Previous studies were able to demonstrate the stability of the $f(R)$ Schwarzschild black hole against gravitational perturbations in both the even and odd parity sectors. In particular, it was seen th... |
1304.2220 | Do-Hyung Kim | Do-Hyung Kim | A characterization of causal automorphisms on two-dimensional Minkowski
spacetime | null | null | 10.1063/1.4826353 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that causal automorphisms on two-dimensional Minkowski spacetime
can be characterized by the invariance of the wave equations.
| [
{
"created": "Mon, 8 Apr 2013 14:34:49 GMT",
"version": "v1"
}
] | 2015-06-15 | [
[
"Kim",
"Do-Hyung",
""
]
] | It is shown that causal automorphisms on two-dimensional Minkowski spacetime can be characterized by the invariance of the wave equations. |
gr-qc/9405028 | U. Bleyer | U. Bleyer, A. Zhuk | Multidimensional Integrable Cosmological Models with Dynamical and
Spontaneous Compactification | 22 pages, 3 figures available on request from ubleyer@aip.de, Potsdam
University, preprint Free University Berlin FUB-HEP/93-19 | null | null | null | gr-qc | null | Multidimensional cosmological models with $n (n > 1)$ spaces of constant
curvature are discussed classically and with respect to canonical quantization.
These models are integrable in the case of Ricci flat internal spaces. For
positive curvature in the external space we find exact solutions modelling
dynamical as we... | [
{
"created": "Wed, 11 May 1994 06:51:05 GMT",
"version": "v1"
},
{
"created": "Fri, 13 May 1994 11:48:50 GMT",
"version": "v2"
}
] | 2009-09-25 | [
[
"Bleyer",
"U.",
""
],
[
"Zhuk",
"A.",
""
]
] | Multidimensional cosmological models with $n (n > 1)$ spaces of constant curvature are discussed classically and with respect to canonical quantization. These models are integrable in the case of Ricci flat internal spaces. For positive curvature in the external space we find exact solutions modelling dynamical as well... |
2310.01050 | Andreas Lymperis | Andreas Lymperis | Holographic dark energy through Loop Quantum Gravity inspired entropy | 19 pages, 4 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a new cosmological holographic dark energy scenario based on
Loop Quantum Gravity inspired entropy, instead of the standard
Bekenstein-Hawking one. The former is an extended black-hole entropy that
arises from non-extensive statistics and quantum geometry and is quantified by
a new dimensionless paramete... | [
{
"created": "Mon, 2 Oct 2023 09:57:17 GMT",
"version": "v1"
}
] | 2023-10-03 | [
[
"Lymperis",
"Andreas",
""
]
] | We construct a new cosmological holographic dark energy scenario based on Loop Quantum Gravity inspired entropy, instead of the standard Bekenstein-Hawking one. The former is an extended black-hole entropy that arises from non-extensive statistics and quantum geometry and is quantified by a new dimensionless parameter ... |
gr-qc/0701165 | X. Hernandez | S. Mendoza, X. Hernandez, P. L. Rendon, C. S. Lopez-Monsalvo, R.
Velasco-Segura | The connection between entropy and the absorption spectra of
Schwarzschild black holes for light and massless scalar fields | 14 Pages, 4 figures. Accepted for publication in the Journal Entropy | Entropy 11:17-31,2009 | 10.3390/e11010017 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present heuristic arguments suggesting that if EM waves with wavelengths
somewhat larger than the Schwarzschild radius of a black hole were fully
absorbed by it, the second law of thermodynamics would be violated, under the
Bekenstein interpretation of the area of a black hole as a measure of its
entropy. Thus, en... | [
{
"created": "Tue, 30 Jan 2007 00:45:37 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Aug 2007 18:50:28 GMT",
"version": "v2"
},
{
"created": "Mon, 12 Jan 2009 05:19:48 GMT",
"version": "v3"
}
] | 2009-02-05 | [
[
"Mendoza",
"S.",
""
],
[
"Hernandez",
"X.",
""
],
[
"Rendon",
"P. L.",
""
],
[
"Lopez-Monsalvo",
"C. S.",
""
],
[
"Velasco-Segura",
"R.",
""
]
] | We present heuristic arguments suggesting that if EM waves with wavelengths somewhat larger than the Schwarzschild radius of a black hole were fully absorbed by it, the second law of thermodynamics would be violated, under the Bekenstein interpretation of the area of a black hole as a measure of its entropy. Thus, entr... |
gr-qc/9502002 | Jun'ichi Yokoyama | Alexei A. Starobinsky and Jun'ichi Yokoyama (YITP Kyoto U.) | Density fluctuations in Brans-Dicke inflation | 13 pages RevTeX file | Proc. Fourth Workshop on General Relativity and Gravitation eds.
K. Nakao et al (Kyoto University, 1995) 381. | null | YITP/U-95-2 | gr-qc astro-ph | null | Spectrum of density perturbations in the Universe generated from
quantum-gravitational fluctuations in slow-roll-over inflationary scenarios
with the Brans-Dicke gravity is calculated. It is shown that after inflation
the isocurvature mode of perturbations may be neglected as compared to the
adiabatic mode, and that ... | [
{
"created": "Wed, 1 Feb 1995 08:47:35 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Starobinsky",
"Alexei A.",
"",
"YITP Kyoto U."
],
[
"Yokoyama",
"Jun'ichi",
"",
"YITP Kyoto U."
]
] | Spectrum of density perturbations in the Universe generated from quantum-gravitational fluctuations in slow-roll-over inflationary scenarios with the Brans-Dicke gravity is calculated. It is shown that after inflation the isocurvature mode of perturbations may be neglected as compared to the adiabatic mode, and that an... |
1905.03604 | Jiang Qing-Quan | Sen Guo, Jin Pu, Qing-Quan Jiang | Joule-Thomson Expansion of Hayward-AdS black hole | 12 pages, 5 figures. arXiv admin note: substantial text overlap with
arXiv:1905.02318; text overlap with arXiv:1709.06426 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study Joule-Thomson expansion for Hayward-AdS black hole in
the extended phase space, and obtain a Joule-Thomson expansion formula for the
black hole. We plot the inversion and isenthalpic curves in the T-P plane, and
determine the cooling-heating regions. The intersection points of the
isenthalpic ... | [
{
"created": "Mon, 6 May 2019 03:52:17 GMT",
"version": "v1"
}
] | 2020-05-08 | [
[
"Guo",
"Sen",
""
],
[
"Pu",
"Jin",
""
],
[
"Jiang",
"Qing-Quan",
""
]
] | In this paper, we study Joule-Thomson expansion for Hayward-AdS black hole in the extended phase space, and obtain a Joule-Thomson expansion formula for the black hole. We plot the inversion and isenthalpic curves in the T-P plane, and determine the cooling-heating regions. The intersection points of the isenthalpic an... |
1610.06478 | Massimiliano Rinaldi | Giovanni Tambalo and Massimiliano Rinaldi | Inflation and reheating in scale-invariant scalar-tensor gravity | Section 4 changed. We explicitly show that inflation is effectively
one-field driven. Accepted for publication on "General Relativity and
Gravitation" | Gen Relativ Gravit (2017) 49:52 | 10.1007/s10714-017-2217-8 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the scale-invariant inflationary model studied in [1]. The
Lagrangian includes all the scale-invariant operators that can be built with
combinations of $R$, $R^2$ and one scalar field. The equations of motion show
that the symmetry is spontaneously broken after an arbitrarily long
inflationary period and ... | [
{
"created": "Thu, 20 Oct 2016 16:09:04 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Oct 2016 10:13:39 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Mar 2017 11:17:16 GMT",
"version": "v3"
}
] | 2017-03-14 | [
[
"Tambalo",
"Giovanni",
""
],
[
"Rinaldi",
"Massimiliano",
""
]
] | We consider the scale-invariant inflationary model studied in [1]. The Lagrangian includes all the scale-invariant operators that can be built with combinations of $R$, $R^2$ and one scalar field. The equations of motion show that the symmetry is spontaneously broken after an arbitrarily long inflationary period and a ... |
1809.08164 | James Lucietti | Carmen Li, James Lucietti | Electrovacuum spacetime near an extreme horizon | 36 pages | Adv. Theor. Math. Phys., 23 (2019), no. 7, 1903-1950 | 10.4310/ATMP.2019.v23.n7.a5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We determine all infinitesimal transverse deformations of extreme horizons in
Einstein-Maxwell theory that preserve axisymmetry. In particular, we show that
the general static transverse deformation of the AdS(2) X S(2) near-horizon
geometry is a two-parameter family, which contains the known extreme charged,
acceler... | [
{
"created": "Fri, 21 Sep 2018 15:01:49 GMT",
"version": "v1"
}
] | 2020-05-19 | [
[
"Li",
"Carmen",
""
],
[
"Lucietti",
"James",
""
]
] | We determine all infinitesimal transverse deformations of extreme horizons in Einstein-Maxwell theory that preserve axisymmetry. In particular, we show that the general static transverse deformation of the AdS(2) X S(2) near-horizon geometry is a two-parameter family, which contains the known extreme charged, accelerat... |
1304.7470 | Mustapha Azreg-A\"inou | Mustapha Azreg-A\"inou | Phase-space analysis of the cosmological 3-fluid problem: Families of
attractors and repellers | 17 pages, 7 figures, To appear in Classical and Quantum Gravity | Class. Quantum Grav. 30, (2013) 205001 | 10.1088/0264-9381/30/20/205001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a phase-space analysis of the cosmological 3-fluid problem
consisting of a barotropic fluid with an equation-of-state parameter
$\gamma-1$, a pressureless dark matter fluid, plus a scalar field $\phi$
(representing dark energy) coupled to exponential potential
$V=V_0\exp{(-\kappa\lambda\phi)}$. Besides the... | [
{
"created": "Sun, 28 Apr 2013 14:18:06 GMT",
"version": "v1"
},
{
"created": "Thu, 2 May 2013 06:50:40 GMT",
"version": "v2"
},
{
"created": "Mon, 2 Sep 2013 06:21:05 GMT",
"version": "v3"
}
] | 2014-01-29 | [
[
"Azreg-Aïnou",
"Mustapha",
""
]
] | We perform a phase-space analysis of the cosmological 3-fluid problem consisting of a barotropic fluid with an equation-of-state parameter $\gamma-1$, a pressureless dark matter fluid, plus a scalar field $\phi$ (representing dark energy) coupled to exponential potential $V=V_0\exp{(-\kappa\lambda\phi)}$. Besides the p... |
1410.8254 | Shamreen Iram | Shamreen Iram | A Dynamical Systems Analysis of Axisymmetric Accretion in a
Schwarzschild Black Hole | 29 pages, 36 figures. The final publication is available at Springer
via http://dx.doi.org/[10.1007/s10714-015-1874-8] | Gen. Relativ. Gravit. (2015) 47:39 | 10.1007/s10714-015-1874-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Stationary, inviscid, axi-symmetric, rotating, transonic accretion flow has
been studied in a general relativistic framework, in the Schwarzschild metric;
for three different flow geometries - under both polytropic and isothermal
conditions. The equilibrium points of the underlying fluid system have been
located and ... | [
{
"created": "Thu, 30 Oct 2014 05:12:00 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Feb 2015 16:38:30 GMT",
"version": "v2"
}
] | 2015-04-06 | [
[
"Iram",
"Shamreen",
""
]
] | Stationary, inviscid, axi-symmetric, rotating, transonic accretion flow has been studied in a general relativistic framework, in the Schwarzschild metric; for three different flow geometries - under both polytropic and isothermal conditions. The equilibrium points of the underlying fluid system have been located and an... |
1510.02656 | Arka Prabha Banik | Arka Prabha Banik, Eduardo Guendelman | On some topological deformation of stationary spacetimes | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We define a completely new space-time starting from the well known
Schwarzschild Space time by defining a new polar angle $\phi '= \phi - \omega
t$ and then redefining the periodicity: instead of demanding that the original
angle be periodic, we demand that the new angle $\phi'$ be periodic, with
period $2\pi$. This ... | [
{
"created": "Fri, 9 Oct 2015 12:57:41 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Oct 2015 01:34:11 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Aug 2017 21:38:33 GMT",
"version": "v3"
}
] | 2017-08-31 | [
[
"Banik",
"Arka Prabha",
""
],
[
"Guendelman",
"Eduardo",
""
]
] | We define a completely new space-time starting from the well known Schwarzschild Space time by defining a new polar angle $\phi '= \phi - \omega t$ and then redefining the periodicity: instead of demanding that the original angle be periodic, we demand that the new angle $\phi'$ be periodic, with period $2\pi$. This de... |
2002.07251 | Ramin G. Daghigh | Ramin G. Daghigh, Michael D. Green, Jodin C. Morey | Significance of Black Hole Quasinormal Modes: A Closer Look | 18 pages, 22 figures | Phys. Rev. D 101, 104009 (2020) | 10.1103/PhysRevD.101.104009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that approximating the Regge-Wheeler Potential with step
functions significantly modifies the Schwarzschild black hole quasinormal mode
spectrum. Surprisingly, this change in the spectrum has little impact on the
ringdown waveform. We examine whether this issue is caused by the jump
discontinuities and/or... | [
{
"created": "Mon, 17 Feb 2020 21:06:47 GMT",
"version": "v1"
},
{
"created": "Tue, 5 May 2020 17:15:10 GMT",
"version": "v2"
}
] | 2020-05-06 | [
[
"Daghigh",
"Ramin G.",
""
],
[
"Green",
"Michael D.",
""
],
[
"Morey",
"Jodin C.",
""
]
] | It is known that approximating the Regge-Wheeler Potential with step functions significantly modifies the Schwarzschild black hole quasinormal mode spectrum. Surprisingly, this change in the spectrum has little impact on the ringdown waveform. We examine whether this issue is caused by the jump discontinuities and/or t... |
1412.6205 | Naveen K. Singh Dr. | Inyong Cho and Naveen K. Singh | Unimodular Theory of Gravity and Inflation | 11 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate inflation and its scalar perturbation driven by a massive
scalar field in the unimodular theory of gravity. We introduce a parameter
$\xi$ with which the theory is invariant under general unimodular coordinate
transformations. When the unimodular parameter is $\xi=6$, the classical
picture of inflation... | [
{
"created": "Fri, 19 Dec 2014 03:44:51 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Mar 2015 07:41:03 GMT",
"version": "v2"
}
] | 2015-03-04 | [
[
"Cho",
"Inyong",
""
],
[
"Singh",
"Naveen K.",
""
]
] | We investigate inflation and its scalar perturbation driven by a massive scalar field in the unimodular theory of gravity. We introduce a parameter $\xi$ with which the theory is invariant under general unimodular coordinate transformations. When the unimodular parameter is $\xi=6$, the classical picture of inflation i... |
1301.3728 | Qiyuan Pan | Zixu Zhao, Qiyuan Pan, Songbai Chen and Jiliang Jing | Holographic superconductor models with $RF^{2}$ corrections | 12 pages, 3 figures and 2 tables | Chinese Phys. Lett. 30, 121101 (2013) | 10.1088/0256-307X/30/12/121101 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the effect of the $RF^2$ correction on the holographic
superconductor model in the background of AdS black hole. We find that, similar
to the effect caused by the Weyl correction, the higher $RF^2$ correction term
can make it easier for the scalar operator to condense and result in the larger
deviation... | [
{
"created": "Wed, 16 Jan 2013 15:36:58 GMT",
"version": "v1"
}
] | 2014-03-07 | [
[
"Zhao",
"Zixu",
""
],
[
"Pan",
"Qiyuan",
""
],
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | We investigate the effect of the $RF^2$ correction on the holographic superconductor model in the background of AdS black hole. We find that, similar to the effect caused by the Weyl correction, the higher $RF^2$ correction term can make it easier for the scalar operator to condense and result in the larger deviations ... |
2307.14625 | Yun Soo Myung | Yun Soo Myung | Two instabilities of Schwarzschild-AdS black holes in
Einstein-Weyl-scalar theory | 15 pages, 3 figures, version to appear in EPJC | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Stability of Schwarzschild-AdS (SAdS) black hole is investigated in
Einstein-Weyl-scalar (EWS) theory with a negative cosmological constant. Here,
we introduce a quadratic scalar coupling to the Weyl term, instead of the
Gauss-Bonnet term. The linearized EWS theory admits the Lichnerowicz equation
for Einstein tensor... | [
{
"created": "Thu, 27 Jul 2023 04:56:53 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Sep 2023 22:16:44 GMT",
"version": "v2"
}
] | 2023-09-26 | [
[
"Myung",
"Yun Soo",
""
]
] | Stability of Schwarzschild-AdS (SAdS) black hole is investigated in Einstein-Weyl-scalar (EWS) theory with a negative cosmological constant. Here, we introduce a quadratic scalar coupling to the Weyl term, instead of the Gauss-Bonnet term. The linearized EWS theory admits the Lichnerowicz equation for Einstein tensor a... |
gr-qc/0412077 | Florian Catalin Popa | Florian Catalin Popa and Ovidiu Tintareanu-Mircea | f-symbols in Robertson-Walker space-times | 10 pages | Central Eur.J.Phys. 3 (2005) 221-228 | 10.2478/BF02475589 | null | gr-qc | null | In a Robertson-Walker space-time a spinning particle model is investigated
and we show that in a stationary case, there exists a class of new structures
called f-symbols which can generate reducible Killing tensors and supersymmetry
algebras.
| [
{
"created": "Thu, 16 Dec 2004 09:27:39 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Popa",
"Florian Catalin",
""
],
[
"Tintareanu-Mircea",
"Ovidiu",
""
]
] | In a Robertson-Walker space-time a spinning particle model is investigated and we show that in a stationary case, there exists a class of new structures called f-symbols which can generate reducible Killing tensors and supersymmetry algebras. |
gr-qc/0203066 | Gerhard Rein | Gerhard Rein | On future geodesic completeness for the Einstein-Vlasov system with
hyperbolic symmetry | 8 pages | Math.Proc.Cambridge Phil.Soc. 137 (2004) 237-244 | 10.1017/S0305004103007485 | null | gr-qc | null | Spacetimes with collisionless matter evolving from data on a compact Cauchy
surface with hyperbolic symmetry are shown to be timelike and null geodesically
complete in the expanding direction, provided the data satisfy a certain size
restriction.
| [
{
"created": "Wed, 20 Mar 2002 12:33:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rein",
"Gerhard",
""
]
] | Spacetimes with collisionless matter evolving from data on a compact Cauchy surface with hyperbolic symmetry are shown to be timelike and null geodesically complete in the expanding direction, provided the data satisfy a certain size restriction. |
gr-qc/0103058 | Douglas Singleton | Sergiu I. Vacaru, D. Singleton, Vitalie A. Botan, and Denis A. Dotenco | Locally Anisotropic Wormholes and Flux Tubes in 5D Gravity | 14 pages, revtex, references added, extra section added giving
physical motivation for the solutions. To be published in PLB | Phys.Lett. B519 (2001) 249-259 | 10.1016/S0370-2693(01)01094-2 | null | gr-qc hep-th | null | In this article we examine a class of wormhole and flux tube like solutions
to 5D vacuum Einstein equations. These solutions possess generic local
anisotropy, and their local isotropic limit is shown to be conformally
equivalent to the spherically symmetric 5D solutions of gr-qc/9807086. The
anisotropic solutions inv... | [
{
"created": "Thu, 15 Mar 2001 23:52:05 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Mar 2001 19:11:58 GMT",
"version": "v2"
},
{
"created": "Wed, 29 Aug 2001 22:26:49 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Vacaru",
"Sergiu I.",
""
],
[
"Singleton",
"D.",
""
],
[
"Botan",
"Vitalie A.",
""
],
[
"Dotenco",
"Denis A.",
""
]
] | In this article we examine a class of wormhole and flux tube like solutions to 5D vacuum Einstein equations. These solutions possess generic local anisotropy, and their local isotropic limit is shown to be conformally equivalent to the spherically symmetric 5D solutions of gr-qc/9807086. The anisotropic solutions inves... |
2203.13477 | Wen-Di Guo | Wen-Di Guo, Shao-Wen Wei, and Yu-Xiao Liu | Shadow of a charged black hole with scalar hair | 12 pages, 3 figures, 2 tables | Eur. Phys. J. C 83, 3, 197 (2023) | 10.1140/epjc/s10052-023-11316-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Seeking singularity free solutions are important for further understanding
black holes in quantum level. Recently, a five-dimensional singularity free
black hole/topological star was constructed [Phys. Rev. Lett. 126, 151101
(2021)]. Through the Kaluza-Klein reduction, an effective four-dimensional
static spherically... | [
{
"created": "Fri, 25 Mar 2022 06:58:31 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Feb 2024 03:53:36 GMT",
"version": "v2"
}
] | 2024-02-23 | [
[
"Guo",
"Wen-Di",
""
],
[
"Wei",
"Shao-Wen",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | Seeking singularity free solutions are important for further understanding black holes in quantum level. Recently, a five-dimensional singularity free black hole/topological star was constructed [Phys. Rev. Lett. 126, 151101 (2021)]. Through the Kaluza-Klein reduction, an effective four-dimensional static spherically s... |
2003.08185 | Dr. Sudhaker Upadhyay | Saheb Soroushfar and Sudhaker Upadhyay | Accretion disks around a static black hole in $f(R)$ gravity | 15 pages, 8 captioned figures, to appear in EPJ Plus | Eur. Phys. J. Plus 135, 338 (2020) | 10.1140/epjp/s13360-020-00329-4 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a description of a thin accretion disc for a static spherically
symmetric black holes in $f(R)$ gravity. In this regard, we first study the
horizons of black holes in $f(R)$ gravity. The equation of motion and effective
potential are also computed which eventually leads to possible existence of
innermost c... | [
{
"created": "Sat, 14 Mar 2020 04:10:52 GMT",
"version": "v1"
}
] | 2020-04-02 | [
[
"Soroushfar",
"Saheb",
""
],
[
"Upadhyay",
"Sudhaker",
""
]
] | We provide a description of a thin accretion disc for a static spherically symmetric black holes in $f(R)$ gravity. In this regard, we first study the horizons of black holes in $f(R)$ gravity. The equation of motion and effective potential are also computed which eventually leads to possible existence of innermost cir... |
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