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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1304.2836 | Emanuele Berti | Emanuele Berti, Vitor Cardoso, Leonardo Gualtieri, Michael Horbatsch,
Ulrich Sperhake | Numerical simulations of single and binary black holes in scalar-tensor
theories: circumventing the no-hair theorem | 21 pages, 6 figures, matches version accepted in Physical Review D | null | 10.1103/PhysRevD.87.124020 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar-tensor theories are a compelling alternative to general relativity and
one of the most accepted extensions of Einstein's theory. Black holes in these
theories have no hair, but could grow "wigs" supported by time-dependent
boundary conditions or spatial gradients. Time-dependent or spatially varying
fields lea... | [
{
"created": "Wed, 10 Apr 2013 03:22:25 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jun 2013 09:36:26 GMT",
"version": "v2"
}
] | 2013-06-26 | [
[
"Berti",
"Emanuele",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Gualtieri",
"Leonardo",
""
],
[
"Horbatsch",
"Michael",
""
],
[
"Sperhake",
"Ulrich",
""
]
] | Scalar-tensor theories are a compelling alternative to general relativity and one of the most accepted extensions of Einstein's theory. Black holes in these theories have no hair, but could grow "wigs" supported by time-dependent boundary conditions or spatial gradients. Time-dependent or spatially varying fields lead ... |
2002.12073 | Lucila Kraiselburd | Carolina Negrelli, Lucila Kraiselburd, Susana J. Landau and Marcelo
Salgado | Solar System tests and chameleon effect in f (R) gravity | accepted in Phys. Rev. D | Phys. Rev. D 101, 064005 (2020) | 10.1103/PhysRevD.101.064005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using a novel and self-consistent approach that avoids the scalar-tensor
identification in the Einstein frame, we reanalyze the viability of f(R)
gravity within the context of solar-system tests. In order to do so, we depart
from a simple but fully relativistic system of differential equations that
describe a compact... | [
{
"created": "Thu, 27 Feb 2020 13:04:26 GMT",
"version": "v1"
}
] | 2020-03-06 | [
[
"Negrelli",
"Carolina",
""
],
[
"Kraiselburd",
"Lucila",
""
],
[
"Landau",
"Susana J.",
""
],
[
"Salgado",
"Marcelo",
""
]
] | Using a novel and self-consistent approach that avoids the scalar-tensor identification in the Einstein frame, we reanalyze the viability of f(R) gravity within the context of solar-system tests. In order to do so, we depart from a simple but fully relativistic system of differential equations that describe a compact o... |
gr-qc/0512153 | Jingyi Zhang | Jingyi Zhang, Zheng Zhao | Charged particles' tunnelling from the Kerr-Newman black hole | 6 pages | Phys.Lett. B638 (2006) 110-113 | 10.1016/j.physletb.2006.05.059 | null | gr-qc | null | In this letter, Parikh-Wilczek tunnelling framework, which treats Hawking
radiation as a tunnelling process, is extended, and the emission rate of a
charged particle tunnelling from the Kerr-Newman black hole is calculated. The
emission spectrum takes the same functional form as that of uncharged particles
and consis... | [
{
"created": "Tue, 27 Dec 2005 13:37:50 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Zhang",
"Jingyi",
""
],
[
"Zhao",
"Zheng",
""
]
] | In this letter, Parikh-Wilczek tunnelling framework, which treats Hawking radiation as a tunnelling process, is extended, and the emission rate of a charged particle tunnelling from the Kerr-Newman black hole is calculated. The emission spectrum takes the same functional form as that of uncharged particles and consists... |
gr-qc/0202084 | V. L. Kalashnikov | V. L. Kalashnikov | Constraints on the Cosmological Parameters in the Relativistic Theory of
Gravitation | 6 pages, 2 figures, LaTeX2e, commented Maple 6 worksheet is
accessible on http://www.geocities.com/optomaplev | null | null | null | gr-qc | null | The causality principle imposes the constraints on the cosmological
parameters in the relativistic theory of gravitation. As a result, X-matter
causes the quite definite cosmological scenario with the alternate acceleration
and deceleration and the final recollapse
| [
{
"created": "Fri, 22 Feb 2002 17:22:08 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kalashnikov",
"V. L.",
""
]
] | The causality principle imposes the constraints on the cosmological parameters in the relativistic theory of gravitation. As a result, X-matter causes the quite definite cosmological scenario with the alternate acceleration and deceleration and the final recollapse |
2312.04260 | Paolo Massimo Bassani | Paolo Massimo Bassani | Varying Constants and the Brans-Dicke theory: a new landscape in
cosmological energy conservation | null | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We develop the Brans-Dicke theory of gravity in the context of varying
constants of Nature. Using the unimodular formalism of General Relativity, we
create a platform to provide physical relational times giving the evolution of
physical constants. We therefore review the ideas and experiments behind
varying constants... | [
{
"created": "Thu, 7 Dec 2023 12:37:49 GMT",
"version": "v1"
}
] | 2023-12-08 | [
[
"Bassani",
"Paolo Massimo",
""
]
] | We develop the Brans-Dicke theory of gravity in the context of varying constants of Nature. Using the unimodular formalism of General Relativity, we create a platform to provide physical relational times giving the evolution of physical constants. We therefore review the ideas and experiments behind varying constants, ... |
1511.04252 | Alessandro D.A.M. Spallicci di Filottrano | P. Ritter, S. Aoudia, A. Spallicci, S. Cordier | Indirect (source-free) integration method. I. Wave-forms from geodesic
generic orbits of EMRIs | To appear in Int. J. Geom. Meth. Mod Phys | 2016, Int. J. Geom. Meth. Mod. Phys., 13, 1650021 | 10.1142/S0219887816500213 | null | gr-qc astro-ph.HE math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Regge-Wheeler-Zerilli (RWZ) wave-equation describes Schwarzschild-Droste
black hole perturbations. The source term contains a Dirac distribution and its
derivative. We have previously designed a method of integration in time domain.
It consists of a finite difference scheme where analytic expressions, dealing
wit... | [
{
"created": "Fri, 13 Nov 2015 11:55:57 GMT",
"version": "v1"
}
] | 2016-03-22 | [
[
"Ritter",
"P.",
""
],
[
"Aoudia",
"S.",
""
],
[
"Spallicci",
"A.",
""
],
[
"Cordier",
"S.",
""
]
] | The Regge-Wheeler-Zerilli (RWZ) wave-equation describes Schwarzschild-Droste black hole perturbations. The source term contains a Dirac distribution and its derivative. We have previously designed a method of integration in time domain. It consists of a finite difference scheme where analytic expressions, dealing with ... |
1911.11438 | Li Zhao | Chen Yang, Zi-Qi Chen, and Li Zhao | Kalb-Ramond field localization on a de Sitter Thick Brane | 16 pages, 10 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the localization of Kalb-Ramond (KR) tensorial gauge
field on a non-flat de Sitter thick brane. The localization and resonance of KR
gauge field are discussed for three kinds of couplings. For the first coupling
there is no localized tensorial zero mode. For the other two couplings, the
zero m... | [
{
"created": "Tue, 26 Nov 2019 10:20:07 GMT",
"version": "v1"
}
] | 2019-11-27 | [
[
"Yang",
"Chen",
""
],
[
"Chen",
"Zi-Qi",
""
],
[
"Zhao",
"Li",
""
]
] | In this paper, we study the localization of Kalb-Ramond (KR) tensorial gauge field on a non-flat de Sitter thick brane. The localization and resonance of KR gauge field are discussed for three kinds of couplings. For the first coupling there is no localized tensorial zero mode. For the other two couplings, the zero mod... |
2212.10853 | Gael SERVIGNAT | Ga\"el Servignat (LUTH (UMR\_8102)), Jerome Novak (LUTH (UMR\_8102)),
Isabel Cordero-Carri\'on | A new formulation of general-relativistic hydrodynamic equations using
primitive variables | null | 2023 Class. Quantum Grav. 40 105002 | 10.1088/1361-6382/acc828 | null | gr-qc physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the derivation of hydrodynamical equations for a perfect fluid in
General Relativity, within the 3+1 decomposition of spacetime framework, using
only primitive variables. Primitive variables are opposed to conserved
variables, as defined in the widely used Valencia formulation of the same
hydrodynamical eq... | [
{
"created": "Wed, 21 Dec 2022 08:57:07 GMT",
"version": "v1"
}
] | 2023-04-17 | [
[
"Servignat",
"Gaël",
"",
"LUTH"
],
[
"Novak",
"Jerome",
"",
"LUTH"
],
[
"Cordero-Carrión",
"Isabel",
""
]
] | We present the derivation of hydrodynamical equations for a perfect fluid in General Relativity, within the 3+1 decomposition of spacetime framework, using only primitive variables. Primitive variables are opposed to conserved variables, as defined in the widely used Valencia formulation of the same hydrodynamical equa... |
gr-qc/9806116 | Andrzej Borowiec | A. Borowiec and M. Francaviglia | Alternative Lagrangians for Einstein Metrics | 9 pages in LaTeX (sprocl.sty). Extended version; misprints removed,
comments and references added. To appear in Proc. Int. Sem. Math. Cosmol.,
Potsdam, 1998, M. Rainer and H.-J. Schmidt (eds.), WSPC Singapore | null | null | null | gr-qc | null | We shall use the variational decomposition technique in order to calculate
equations of motion and Noether energy-momentum complex for some classes of
non-linear gravitational Lagrangians within the first-order (Palatini)
formalism. In particular, a complex space-time appears as a solution of our
variational problem.... | [
{
"created": "Tue, 30 Jun 1998 11:17:41 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Jul 1998 11:44:48 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Borowiec",
"A.",
""
],
[
"Francaviglia",
"M.",
""
]
] | We shall use the variational decomposition technique in order to calculate equations of motion and Noether energy-momentum complex for some classes of non-linear gravitational Lagrangians within the first-order (Palatini) formalism. In particular, a complex space-time appears as a solution of our variational problem. |
2002.09613 | Philip Chang | Philip Chang, Zachariah Etienne | General Relativistic Hydrodynamics on a Moving-mesh I: Static Spacetimes | 10 pages, 4 figures, accepted version, update description of Riemann
solver | null | 10.1093/mnras/staa1532 | null | gr-qc astro-ph.IM physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first-ever moving-mesh general relativistic hydrodynamics
solver for static spacetimes as implemented in the code, MANGA. Our
implementation builds on the architectures of MANGA and the numerical
relativity Python package NRPy+. We review the general algorithm to solve these
equations and, in particula... | [
{
"created": "Sat, 22 Feb 2020 03:46:12 GMT",
"version": "v1"
},
{
"created": "Thu, 28 May 2020 17:21:12 GMT",
"version": "v2"
}
] | 2020-07-01 | [
[
"Chang",
"Philip",
""
],
[
"Etienne",
"Zachariah",
""
]
] | We present the first-ever moving-mesh general relativistic hydrodynamics solver for static spacetimes as implemented in the code, MANGA. Our implementation builds on the architectures of MANGA and the numerical relativity Python package NRPy+. We review the general algorithm to solve these equations and, in particular,... |
0712.0085 | Laszlo B. Szabados | Laszlo B Szabados | On some global problems in the tetrad approach to quasi-local quantities | 13 pages, a more detailed discussion of the problems is given,
Theorems 3.1 and 3.2 are modified slightly, the proof of Theorem 4.3 is
improved, 5 references are added, misprints are corrected. Appearing in
Class. Quantum Grav | Class.Quant.Grav.25:195004,2008 | 10.1088/0264-9381/25/19/195004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The potential global topological obstructions to the tetrad approach to
finding the quasi-local conserved quantities, associated with closed,
orientable spacelike 2-surfaces S, are investigated. First we show that the
Lorentz frame bundle is always globally trivializable over an open
neighbourhood U of any such S if ... | [
{
"created": "Sat, 1 Dec 2007 14:48:39 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Aug 2008 16:08:39 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Szabados",
"Laszlo B",
""
]
] | The potential global topological obstructions to the tetrad approach to finding the quasi-local conserved quantities, associated with closed, orientable spacelike 2-surfaces S, are investigated. First we show that the Lorentz frame bundle is always globally trivializable over an open neighbourhood U of any such S if an... |
gr-qc/0702062 | Banibrata Mukhopadhyay | Banibrata Mukhopadhyay | Gravity induced neutrino-antineutrino oscillation: CPT and lepton number
non-conservation under gravity | 15 pages; Accepted for publication in Classical and Quantum Gravity | Class.Quant.Grav.24:1433-1442,2007 | 10.1088/0264-9381/24/6/004 | null | gr-qc astro-ph hep-ph | null | We introduce a new effect in the neutrino oscillation phase which shows the
neutrino-antineutrino oscillation is possible under gravity even if the rest
masses of the corresponding eigenstates are same. This is due to CPT violation
and possible to demonstrate if the neutrino mass eigenstates are expressed as a
combin... | [
{
"created": "Sat, 10 Feb 2007 07:20:01 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Mukhopadhyay",
"Banibrata",
""
]
] | We introduce a new effect in the neutrino oscillation phase which shows the neutrino-antineutrino oscillation is possible under gravity even if the rest masses of the corresponding eigenstates are same. This is due to CPT violation and possible to demonstrate if the neutrino mass eigenstates are expressed as a combinat... |
2112.02444 | Larry Ford | L. H. Ford | Cosmological Particle Production: A Review | 28 pages, 3 figures, contains some material adapted from
arXiv:gr-qc/9707062 | Rep. Prog. Phys. 84, 116901 (2021) | 10.1088/1361-6633/ac1b23 | null | gr-qc astro-ph.CO quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article will review quantum particle creation in expanding universes.
The emphasis will be on the basic physical principles and on selected
applications to cosmological models. The needed formalism of quantum field
theory in curved spacetime will be summarized, and applied to the example of
scalar particle creat... | [
{
"created": "Sat, 4 Dec 2021 23:09:33 GMT",
"version": "v1"
}
] | 2021-12-07 | [
[
"Ford",
"L. H.",
""
]
] | This article will review quantum particle creation in expanding universes. The emphasis will be on the basic physical principles and on selected applications to cosmological models. The needed formalism of quantum field theory in curved spacetime will be summarized, and applied to the example of scalar particle creatio... |
1312.6451 | P. A. Gonzalez | Marcela Catalan, Eduardo Cisternas, P. A. Gonzalez and Yerko Vasquez | Dirac quasinormal modes for a 4-dimensional Lifshitz Black Hole | Version accepted for publication in EPJC. arXiv admin note: text
overlap with arXiv:1306.5974 | null | 10.1140/epjc/s10052-014-2813-7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the quasinormal modes of fermionic perturbations for an
asymptotically Lifshitz black hole in 4-dimensions with dynamical exponent z=2
and plane topology for the transverse section, and we find analytically and
numerically the quasinormal modes for massless fermionic fields by using the
improved asymptotic i... | [
{
"created": "Mon, 23 Dec 2013 01:26:58 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Mar 2014 14:59:26 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Catalan",
"Marcela",
""
],
[
"Cisternas",
"Eduardo",
""
],
[
"Gonzalez",
"P. A.",
""
],
[
"Vasquez",
"Yerko",
""
]
] | We study the quasinormal modes of fermionic perturbations for an asymptotically Lifshitz black hole in 4-dimensions with dynamical exponent z=2 and plane topology for the transverse section, and we find analytically and numerically the quasinormal modes for massless fermionic fields by using the improved asymptotic ite... |
gr-qc/0609020 | Philippe Grandclement | Philippe Grandclement (LUTH) | Introduction to spectral methods | 20 pages, 15 figures | Stellar fluid dynamics and numerical simulations: from the sun to
neutron stars, France (2006) 153 | 10.1051/eas:2006112 | null | gr-qc math.SP physics.comp-ph | null | This proceeding is intended to be a first introduction to spectral methods.
It is written around some simple problems that are solved explicitly and in
details and that aim at demonstrating the power of those methods. The
mathematical foundation of the spectral approximation is first introduced,
based on the Gauss qu... | [
{
"created": "Wed, 6 Sep 2006 10:01:17 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Grandclement",
"Philippe",
"",
"LUTH"
]
] | This proceeding is intended to be a first introduction to spectral methods. It is written around some simple problems that are solved explicitly and in details and that aim at demonstrating the power of those methods. The mathematical foundation of the spectral approximation is first introduced, based on the Gauss quad... |
gr-qc/0211099 | Ujjal Debnath | Asit Banerjee, Ujjal Debnath and Subenoy Chakraborty | Naked Singularities in Higher Dimensional Gravitational Collapse | 7 Latex pages, No figure, Revtex style | Int.J.Mod.Phys. D12 (2003) 1255-1264 | 10.1142/S021827180300375X | null | gr-qc | null | Spherically symmetric inhomogeneous dust collapse has been studied in higher
dimensional space-time and the factors responsible for the appearance of a
naked singularity are analyzed in the region close to the centre for the
marginally bound case. It is clearly demonstrated that in the former case naked
singularities... | [
{
"created": "Thu, 28 Nov 2002 12:18:53 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Feb 2003 10:53:20 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Banerjee",
"Asit",
""
],
[
"Debnath",
"Ujjal",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | Spherically symmetric inhomogeneous dust collapse has been studied in higher dimensional space-time and the factors responsible for the appearance of a naked singularity are analyzed in the region close to the centre for the marginally bound case. It is clearly demonstrated that in the former case naked singularities d... |
gr-qc/9509056 | Sergey V. Sushkov | Sushkov Sergei | Chronology Protection and Quantized Fields: Complex Automorphic Scalar
Field in Misner Space | 7 pages, LaTeX, two figures are available in PCX or postscript format
upon request, to appear in Proceedings of the 3rd Friedmann Seminar | Class.Quant.Grav.14:523-534,1997 | 10.1088/0264-9381/14/2/025 | null | gr-qc | null | The renormalized stress-energy tensor $\langle T_{\mu\nu}\rangle$ of the
quantized complex massless scalar field which obeys the automorphic condition
in Misner space is obtained. It is shown that there exists the special value of
the automorphic parameter for which $\langle T_{\mu\nu}\rangle$ is regular on
the chron... | [
{
"created": "Thu, 28 Sep 1995 05:02:45 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Sergei",
"Sushkov",
""
]
] | The renormalized stress-energy tensor $\langle T_{\mu\nu}\rangle$ of the quantized complex massless scalar field which obeys the automorphic condition in Misner space is obtained. It is shown that there exists the special value of the automorphic parameter for which $\langle T_{\mu\nu}\rangle$ is regular on the chronol... |
1803.03703 | Yousef Bisabr | Yousef Bisabr | Gravitational Coupling and the Cosmological Constant | 7 pages, no figure. To appear in IJMPD | Int. J. Mod. Phys. D 27, 1850086 (2018) | 10.1142/S0218271818500864 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We deal with a dynamical mechanism in which a large cosmological constant, as
suggested by inflationary scenarios, decays due to expansion of the universe.
This mechanism has its origin in the gravitational coupling of the vacuum
density. We assume that the vacuum couples anomalously to gravity that is the
metric ten... | [
{
"created": "Fri, 9 Mar 2018 21:48:03 GMT",
"version": "v1"
}
] | 2018-06-05 | [
[
"Bisabr",
"Yousef",
""
]
] | We deal with a dynamical mechanism in which a large cosmological constant, as suggested by inflationary scenarios, decays due to expansion of the universe. This mechanism has its origin in the gravitational coupling of the vacuum density. We assume that the vacuum couples anomalously to gravity that is the metric tenso... |
1606.08451 | Adam Levi | Adam Levi, Amos Ori | Mode-sum regularization of $\left\langle \phi^{2} \right\rangle$ in the
angular-splitting method | 34 pages, 12 figures. Submitted to Phys. Rev. D | Phys. Rev. D 94, 044054 (2016) | 10.1103/PhysRevD.94.044054 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The computation of the renormalized stress-energy tensor or
$\left\langle\phi^{2}\right\rangle_{ren}$ in curved spacetime is a challenging
task, at both the conceptual and technical levels. Recently we developed a new
approach to compute such renormalized quantities in asymptotically-flat curved
spacetimes, based on ... | [
{
"created": "Mon, 27 Jun 2016 20:00:06 GMT",
"version": "v1"
}
] | 2016-08-30 | [
[
"Levi",
"Adam",
""
],
[
"Ori",
"Amos",
""
]
] | The computation of the renormalized stress-energy tensor or $\left\langle\phi^{2}\right\rangle_{ren}$ in curved spacetime is a challenging task, at both the conceptual and technical levels. Recently we developed a new approach to compute such renormalized quantities in asymptotically-flat curved spacetimes, based on th... |
2007.00285 | Tetsuya Shiromizu | Tetsuya Shiromizu and Diego Soligon | The positive mass theorem in Kaluza-Klein picture | 8 pages, 2 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reconsider Schoen and Yau's proof of the positive mass theorem from the
extra dimensional point of view, and we introduce a modified argument to prove
the theorem in the Kaluza-Klein picture. We consider in this study an
alternative condition to Jang's equation, which makes the argument more
physically intuitive.
| [
{
"created": "Wed, 1 Jul 2020 07:22:55 GMT",
"version": "v1"
}
] | 2020-07-02 | [
[
"Shiromizu",
"Tetsuya",
""
],
[
"Soligon",
"Diego",
""
]
] | We reconsider Schoen and Yau's proof of the positive mass theorem from the extra dimensional point of view, and we introduce a modified argument to prove the theorem in the Kaluza-Klein picture. We consider in this study an alternative condition to Jang's equation, which makes the argument more physically intuitive. |
2007.01732 | Leonardo Campanelli | Leonardo Campanelli | Creation of Universes from the Third-Quantized Vacuum | 12 pages, 7 figures, accepted for publication in Physical Review D | Phys. Rev. D 102, 043514 (2020) | 10.1103/PhysRevD.102.043514 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the average numbers of closed, flat, and open universes
spontaneously created from nothing in third quantization. The creation of
universes is exponentially suppressed for large values of the kinetic energy of
the inflaton, while for small kinetic energies it is exponentially favoured for
closed universe... | [
{
"created": "Fri, 3 Jul 2020 14:54:30 GMT",
"version": "v1"
}
] | 2020-08-19 | [
[
"Campanelli",
"Leonardo",
""
]
] | We calculate the average numbers of closed, flat, and open universes spontaneously created from nothing in third quantization. The creation of universes is exponentially suppressed for large values of the kinetic energy of the inflaton, while for small kinetic energies it is exponentially favoured for closed universes ... |
2405.06921 | Anxianyi Xiong | Anxianyi Xiong, Xin-zhe Zhang, Taotao Qiu | Perturbations of Mimetic Curvaton | null | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The mimetic gravity theory is one of the interesting modified gravity
theories, which aims to unify the matter component of our universe within the
power of gravity. The mimetic-like theory can also be responsible for
primordial perturbations production, e.g., when the mimetic field is set to be
like a curvaton field... | [
{
"created": "Sat, 11 May 2024 05:45:17 GMT",
"version": "v1"
}
] | 2024-05-14 | [
[
"Xiong",
"Anxianyi",
""
],
[
"Zhang",
"Xin-zhe",
""
],
[
"Qiu",
"Taotao",
""
]
] | The mimetic gravity theory is one of the interesting modified gravity theories, which aims to unify the matter component of our universe within the power of gravity. The mimetic-like theory can also be responsible for primordial perturbations production, e.g., when the mimetic field is set to be like a curvaton field, ... |
1404.4099 | Hartmut Abele | T. Jenke, G. Cronenberg, J. Burgd\"orfer, L.A. Chizhova, P.
Geltenbort, A.N. Ivanov, T. Lauer, T. Lins, S. Rotter, H. Saul, U. Schmidt,
H. Abele | Gravity Resonance Spectroscopy Constrains Dark Energy and Dark Matter
Scenarios | 5 pages, 4 figures | Phys. Rev. Lett. 112, 151105 (2014) | 10.1103/PhysRevLett.112.151105 | null | gr-qc nucl-ex quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report on precision resonance spectroscopy measurements of quantum states
of ultracold neutrons confined above the surface of a horizontal mirror by the
gravity potential of the Earth. Resonant transitions between several of the
lowest quantum states are observed for the first time. These measurements
demonstrate,... | [
{
"created": "Tue, 15 Apr 2014 22:24:59 GMT",
"version": "v1"
}
] | 2014-10-08 | [
[
"Jenke",
"T.",
""
],
[
"Cronenberg",
"G.",
""
],
[
"Burgdörfer",
"J.",
""
],
[
"Chizhova",
"L. A.",
""
],
[
"Geltenbort",
"P.",
""
],
[
"Ivanov",
"A. N.",
""
],
[
"Lauer",
"T.",
""
],
[
"Lins",
... | We report on precision resonance spectroscopy measurements of quantum states of ultracold neutrons confined above the surface of a horizontal mirror by the gravity potential of the Earth. Resonant transitions between several of the lowest quantum states are observed for the first time. These measurements demonstrate, t... |
1508.01079 | Paul Frampton | Paul Howard Frampton | Scale Invariant Density Perturbations from Cyclic Cosmology | 11 pages, LaTeX | null | 10.1142/S0217732316500760 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown how quantum fluctuations of the radiation during the contraction
era of a CBE (Comes Back Empty) cyclic cosmology can provide density
fluctuations which re-enter the horizon during the subsequent expansion era and
at lowest order are scale invariant, in a Harrison-Zel'dovich-Peebles sense, as
necessary to... | [
{
"created": "Tue, 4 Aug 2015 16:27:28 GMT",
"version": "v1"
}
] | 2016-05-25 | [
[
"Frampton",
"Paul Howard",
""
]
] | It is shown how quantum fluctuations of the radiation during the contraction era of a CBE (Comes Back Empty) cyclic cosmology can provide density fluctuations which re-enter the horizon during the subsequent expansion era and at lowest order are scale invariant, in a Harrison-Zel'dovich-Peebles sense, as necessary to b... |
1804.00988 | Ernesto Contreras | Ernesto Contreras and Pedro Bargue\~no | A self-sustained traversable scale-dependent wormhole | Accepted in Int. J. Mod. Phys. D | International Journal of Modern Physics D Vol. 27, No. 9 (2018)
1850101 | 10.1142/S0218271818501018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A self--sustained traversable wormhole is obtained as a vacuum solution of a
scale-dependent gravitational theory. Comparison with other approaches towards
wormhole self--sustainability are presented, with emphasis on the running of
the gravitational coupling and on a possible effective description of gravity
near th... | [
{
"created": "Tue, 3 Apr 2018 14:24:20 GMT",
"version": "v1"
}
] | 2019-04-01 | [
[
"Contreras",
"Ernesto",
""
],
[
"Bargueño",
"Pedro",
""
]
] | A self--sustained traversable wormhole is obtained as a vacuum solution of a scale-dependent gravitational theory. Comparison with other approaches towards wormhole self--sustainability are presented, with emphasis on the running of the gravitational coupling and on a possible effective description of gravity near the ... |
1207.5472 | Diego S\'aez-G\'omez | Diego S\'aez-G\'omez (University of the Basque Country) | Cosmological evolution, future singularities, Little Rip and Pseudo-Rip
in viable f(R) theories and their scalar-tensor counterpart | 20 pages. Extended version, new figures and additional analysis.
Version to be published in Class. Quant. Grav | Class. Quantum Grav. 30, 095008, 2013 | 10.1088/0264-9381/30/9/095008 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified f(R) gravity is one of the most promising candidates for dark
energy, and even for the unification of the whole cosmological evolution,
including the inflationary phase. Within this class of theories, the so-called
viable modified gravities represent realistic theories that are capable of
reproducing late-ti... | [
{
"created": "Mon, 23 Jul 2012 18:15:10 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Apr 2013 13:06:28 GMT",
"version": "v2"
}
] | 2015-06-05 | [
[
"Sáez-Gómez",
"Diego",
"",
"University of the Basque Country"
]
] | Modified f(R) gravity is one of the most promising candidates for dark energy, and even for the unification of the whole cosmological evolution, including the inflationary phase. Within this class of theories, the so-called viable modified gravities represent realistic theories that are capable of reproducing late-time... |
gr-qc/9804005 | Vojtich Pravda | J. Bicak and V. Pravda | Curvature invariants in type N spacetimes | 17 pages, to appear in Class. Quantum Grav | Class.Quant.Grav.15:1539-1555,1998 | 10.1088/0264-9381/15/6/011 | null | gr-qc | null | Scalar curvature invariants are studied in type N solutions of vacuum
Einstein's equations with in general non-vanishing cosmological constant
Lambda. Zero-order invariants which include only the metric and Weyl (Riemann)
tensor either vanish, or are constants depending on Lambda. Even all
higher-order invariants con... | [
{
"created": "Thu, 2 Apr 1998 14:54:24 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Apr 1998 15:20:20 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bicak",
"J.",
""
],
[
"Pravda",
"V.",
""
]
] | Scalar curvature invariants are studied in type N solutions of vacuum Einstein's equations with in general non-vanishing cosmological constant Lambda. Zero-order invariants which include only the metric and Weyl (Riemann) tensor either vanish, or are constants depending on Lambda. Even all higher-order invariants conta... |
1511.07095 | Woei Chet Lim | Alan Coley and Woei Chet Lim | Spikes and matter inhomogeneities in massless scalar field models | 24 pages, 3 figures | Class. Quantum Grav. 33 (2016) 015009 | 10.1088/0264-9381/33/1/015009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We shall discuss the general relativistic generation of spikes in a massless
scalar field or stiff perfect fluid model. We first investigate orthogonally
transitive (OT) $G_2$ stiff fluid spike models both heuristically and
numerically, and give a new exact OT $G_2$ stiff fluid spike solution. We then
present a new t... | [
{
"created": "Mon, 23 Nov 2015 02:14:21 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Jan 2017 22:50:56 GMT",
"version": "v2"
}
] | 2017-01-12 | [
[
"Coley",
"Alan",
""
],
[
"Lim",
"Woei Chet",
""
]
] | We shall discuss the general relativistic generation of spikes in a massless scalar field or stiff perfect fluid model. We first investigate orthogonally transitive (OT) $G_2$ stiff fluid spike models both heuristically and numerically, and give a new exact OT $G_2$ stiff fluid spike solution. We then present a new two... |
gr-qc/9601037 | Erik Martinez | Erik A. Martinez (Center for Gravitational Physics and Geometry, Penn
State, USA) | Fundamental thermodynamical equation of a self-gravitating system | 30 pages, Revtex, no figures; Introduction rewritten and small
changes included throughout to improve presentation; to appear in Physical
Review D | Phys.Rev. D53 (1996) 7062-7072 | 10.1103/PhysRevD.53.7062 | CGPG-96/1-6 | gr-qc hep-th | null | The features of the fundamental thermodynamical relation (expressing entropy
as function of state variables) that arise from the self-gravitating character
of a system are analyzed. The models studied include not only a spherically
symmetric hot matter shell with constant particle number but also a black hole
charact... | [
{
"created": "Tue, 23 Jan 1996 14:18:37 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Apr 1996 14:23:26 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Martinez",
"Erik A.",
"",
"Center for Gravitational Physics and Geometry, Penn\n State, USA"
]
] | The features of the fundamental thermodynamical relation (expressing entropy as function of state variables) that arise from the self-gravitating character of a system are analyzed. The models studied include not only a spherically symmetric hot matter shell with constant particle number but also a black hole character... |
1905.08512 | Giovanni Acquaviva | Morteza Kerachian, Giovanni Acquaviva, Georgios Lukes-Gerakopoulos | Classes of non-minimally coupled scalar fields in spatially curved FRW
spacetimes | 13 pages, 7 figures | Phys. Rev. D 99, 123516 (2019) | 10.1103/PhysRevD.99.123516 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we perform a dynamical analysis of a broad class of
non-minimally coupled real scalar fields in the Friedmann-Robertson-Walker
(FRW) spacetime framework. The first part of our study concerns the dynamics of
an unspecified positive potential in a spatially curved FRW spacetime, for
which we define a new s... | [
{
"created": "Tue, 21 May 2019 09:27:06 GMT",
"version": "v1"
}
] | 2019-06-18 | [
[
"Kerachian",
"Morteza",
""
],
[
"Acquaviva",
"Giovanni",
""
],
[
"Lukes-Gerakopoulos",
"Georgios",
""
]
] | In this work we perform a dynamical analysis of a broad class of non-minimally coupled real scalar fields in the Friedmann-Robertson-Walker (FRW) spacetime framework. The first part of our study concerns the dynamics of an unspecified positive potential in a spatially curved FRW spacetime, for which we define a new set... |
1804.05382 | Jos\'e Tom\'as G\'alvez Ghersi | Aditya Dhumuntarao, Jos\'e Tom\'as G\'alvez Ghersi, Niayesh Afshordi | Instantaneous Temperatures \`a la Hadamard: Towards a generalized
Stefan-Boltzmann law for curved spacetime | REVTeX 4.1, 10 pages, 2 figures. Considered effects from higher order
terms in the quasi-local expansion. Minor typos fixed, conclusions revised | null | null | SCG-2018-04 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the celebrated Unruh effect, we learn that a uniformly accelerating
detector in a Minkowski vacuum spacetime registers a constant temperature.
Building on prior work, we present a technique based on derivative couplings of
the two-point Wightman function and the Hadamard renormalization procedure to
define an inst... | [
{
"created": "Sun, 15 Apr 2018 17:09:23 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Apr 2018 20:03:01 GMT",
"version": "v2"
}
] | 2018-04-19 | [
[
"Dhumuntarao",
"Aditya",
""
],
[
"Ghersi",
"José Tomás Gálvez",
""
],
[
"Afshordi",
"Niayesh",
""
]
] | In the celebrated Unruh effect, we learn that a uniformly accelerating detector in a Minkowski vacuum spacetime registers a constant temperature. Building on prior work, we present a technique based on derivative couplings of the two-point Wightman function and the Hadamard renormalization procedure to define an instan... |
2209.04429 | Martin Bojowald | Martin Bojowald and Freddy Hancock | Quasiclassical model of inhomogeneous cosmology | 43 pages, 11 figures | Class. Quantum Grav. 40 (2023) 155012 | 10.1088/1361-6382/acdd45 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Fluctuation terms and higher moments of a quantum state imply corrections to
the classical equations of motion that may have implications in early-universe
cosmology, for instance in the state-dependent form of effective potentials. In
addition, space-time properties are relevant in cosmology, in particular when
comb... | [
{
"created": "Fri, 9 Sep 2022 17:41:25 GMT",
"version": "v1"
}
] | 2023-07-10 | [
[
"Bojowald",
"Martin",
""
],
[
"Hancock",
"Freddy",
""
]
] | Fluctuation terms and higher moments of a quantum state imply corrections to the classical equations of motion that may have implications in early-universe cosmology, for instance in the state-dependent form of effective potentials. In addition, space-time properties are relevant in cosmology, in particular when combin... |
2305.12771 | Uwe R. Fischer | Sang-Shin Baak, Satadal Datta, Uwe R. Fischer | Petrov classification of analogue spacetimes | 11 pages, 2 figures; added section with general considerations on
possible Petrov types of Painlev\'e-Gullstrand geometries, to appear in
Classical and Quantum Gravity | Class. Quantum Grav. 40, 215001 (2023) | 10.1088/1361-6382/acf08e | null | gr-qc cond-mat.quant-gas | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In an effort to invariantly characterize the conformal curvature structure of
analogue spacetimes built from a nonrelativistic fluid background, we determine
the Petrov type of a variety of laboratory geometries. Starting from the
simplest examples, we increase the complexity of the background, and thereby
determine ... | [
{
"created": "Mon, 22 May 2023 07:01:13 GMT",
"version": "v1"
},
{
"created": "Wed, 31 May 2023 04:55:16 GMT",
"version": "v2"
},
{
"created": "Fri, 11 Aug 2023 09:41:21 GMT",
"version": "v3"
}
] | 2023-10-06 | [
[
"Baak",
"Sang-Shin",
""
],
[
"Datta",
"Satadal",
""
],
[
"Fischer",
"Uwe R.",
""
]
] | In an effort to invariantly characterize the conformal curvature structure of analogue spacetimes built from a nonrelativistic fluid background, we determine the Petrov type of a variety of laboratory geometries. Starting from the simplest examples, we increase the complexity of the background, and thereby determine ho... |
1507.05099 | Marcus Werner | Marcus C. Werner | A geometrical approach to gravitational lensing magnification | 4 pages, for the Proceedings of the 14th Marcel Grossmann Meeting,
based on gr-qc/1507.02765 | null | null | null | gr-qc astro-ph.GA math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The standard definition of gravitational lensing magnification is generalized
to Lorentzian spacetimes, and it is shown how it can be interpreted
geometrically in terms of the van Vleck determinant and the exponential map.
This is joint work with Amir B. Aazami (Kavli IPMU, University of Tokyo).
| [
{
"created": "Fri, 17 Jul 2015 20:02:54 GMT",
"version": "v1"
}
] | 2015-07-21 | [
[
"Werner",
"Marcus C.",
""
]
] | The standard definition of gravitational lensing magnification is generalized to Lorentzian spacetimes, and it is shown how it can be interpreted geometrically in terms of the van Vleck determinant and the exponential map. This is joint work with Amir B. Aazami (Kavli IPMU, University of Tokyo). |
2308.15354 | Zheng Wu | Zheng Wu, Hui-Min Fan, Yi-Ming Hu, Ik Siong Heng | Searching for gravitational-wave bursts with space-borne detectors | 13 pages, 9 figures, comments welcome | the 15 May 2024 issue of Physical Review D (Vol. 109, No. 10) | 10.1103/PhysRevD.109.103004 | null | gr-qc astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The millihertz gravitational wave band is expected to be opened by
space-borne detectors like TianQin. Various mechanisms can produce short
outbursts of gravitational waves, whose actual waveform can be hard to model.
In order to identify such gravitational wave bursts and not to misclassify them
as noise transients,... | [
{
"created": "Tue, 29 Aug 2023 14:49:28 GMT",
"version": "v1"
},
{
"created": "Tue, 14 May 2024 07:55:57 GMT",
"version": "v2"
}
] | 2024-05-15 | [
[
"Wu",
"Zheng",
""
],
[
"Fan",
"Hui-Min",
""
],
[
"Hu",
"Yi-Ming",
""
],
[
"Heng",
"Ik Siong",
""
]
] | The millihertz gravitational wave band is expected to be opened by space-borne detectors like TianQin. Various mechanisms can produce short outbursts of gravitational waves, whose actual waveform can be hard to model. In order to identify such gravitational wave bursts and not to misclassify them as noise transients, w... |
gr-qc/0004046 | Jelle Boersma | Jelle P. Boersma | Variational dynamics in open spacetimes | 21 pages, Latex, no figures | Phys.Rev. D60 (1999) 084013 | 10.1103/PhysRevD.60.084013 | null | gr-qc | null | We study the effect of non-vanishing surface terms at spatial infinity on the
dynamics of a scalar field in an open FLRW spacetime. Starting from the
path-integral formulation of quantum field theory we argue that classical
physics is described by field configurations which extremize the action
functional in the spac... | [
{
"created": "Fri, 14 Apr 2000 11:21:44 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Boersma",
"Jelle P.",
""
]
] | We study the effect of non-vanishing surface terms at spatial infinity on the dynamics of a scalar field in an open FLRW spacetime. Starting from the path-integral formulation of quantum field theory we argue that classical physics is described by field configurations which extremize the action functional in the space ... |
1908.05332 | Arvin Ravanpak | Arvin Ravanpak, Golnaz Farpour Fadakar | Interacting Agegraphic Dark Energy Model in DGP Braneworld Cosmology:
Dynamical System Approach | null | Mod. Phys. Lett. A 34, 1950105 (2019) | 10.1142/S0217732319501050 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A proposal to study the effect of interaction in an agegraphic dark energy
model in DGP brane-world cosmology is presented in this manuscript. After
explaining the details, we proceed to apply the dynamical system approach to
the model to analyze its stability. We first, constrain model parameters with a
variety of i... | [
{
"created": "Wed, 14 Aug 2019 20:10:40 GMT",
"version": "v1"
}
] | 2019-08-16 | [
[
"Ravanpak",
"Arvin",
""
],
[
"Fadakar",
"Golnaz Farpour",
""
]
] | A proposal to study the effect of interaction in an agegraphic dark energy model in DGP brane-world cosmology is presented in this manuscript. After explaining the details, we proceed to apply the dynamical system approach to the model to analyze its stability. We first, constrain model parameters with a variety of ind... |
1610.05753 | Parthapratim Pradhan | Parthapratim Pradhan | Enthalpy, Geometric Volume and Logarithmic correction to Entropy for
Van-der-Waals Black Hole | EPL version, 7 pages, 5 figures | EPL, 116 (2016) 10001 | 10.1209/0295-5075/116/10001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | If the negative cosmological constant is treated as a dynamical pressure and
if the volume be its thermodynamically conjugate variable then the
gravitational mass can be expressed as the total gravitational enthalpy rather
than the energy. Under these circumstances, a new phenomena emerges in the
context of extended ... | [
{
"created": "Tue, 18 Oct 2016 19:35:03 GMT",
"version": "v1"
}
] | 2016-11-08 | [
[
"Pradhan",
"Parthapratim",
""
]
] | If the negative cosmological constant is treated as a dynamical pressure and if the volume be its thermodynamically conjugate variable then the gravitational mass can be expressed as the total gravitational enthalpy rather than the energy. Under these circumstances, a new phenomena emerges in the context of extended ph... |
2309.13894 | Fil Simovic | Fil Simovic | Black Holes, Equilibrium, and Cosmology | 9 pages, 1 figure. Honorable Mention for the Gravity Research
Foundation 2023 Awards for Essays on Gravitation | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We trace the origins and development of black hole thermodynamics across the
past half-century, emphasizing the framework's relation to classical
thermodynamics, and the vital role played by the notions of equilibrium,
stationarity, and symmetry. We discuss different interpretations of the first
law of black hole mec... | [
{
"created": "Mon, 25 Sep 2023 06:19:37 GMT",
"version": "v1"
}
] | 2023-09-26 | [
[
"Simovic",
"Fil",
""
]
] | We trace the origins and development of black hole thermodynamics across the past half-century, emphasizing the framework's relation to classical thermodynamics, and the vital role played by the notions of equilibrium, stationarity, and symmetry. We discuss different interpretations of the first law of black hole mecha... |
1304.2796 | Krzysztof Urbanowski | K. Urbanowski and M. Szydlowski | Cosmology with a decaying vacuum | 4 pages, 2 figures, based on a talk given at Multiverse and
Fundamental Cosmology (Multicosmofun'12), Szczecin, Poland, 10-14 September
2012. arXiv admin note: text overlap with arXiv:1006.2417 by other authors | AIP Conf. Proc. 1514, 143 (2013) | 10.1063/1.4791743 | null | gr-qc astro-ph.HE hep-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Properties of unstable false vacuum states are analyzed from the point of
view of the quantum theory of unstable states. Some of false vacuum states
survive up to times when their survival probability has a non-exponential form.
At times much latter than the transition time, when contributions to the
survival probabi... | [
{
"created": "Wed, 10 Apr 2013 11:25:42 GMT",
"version": "v1"
}
] | 2013-04-11 | [
[
"Urbanowski",
"K.",
""
],
[
"Szydlowski",
"M.",
""
]
] | Properties of unstable false vacuum states are analyzed from the point of view of the quantum theory of unstable states. Some of false vacuum states survive up to times when their survival probability has a non-exponential form. At times much latter than the transition time, when contributions to the survival probabili... |
2107.04467 | Guangzhou Guo | Guangzhou Guo, Peng Wang, Houwen Wu and Haitang Yang | Thermodynamics and Phase Structure of an Einstein-Maxwell-scalar Model
in Extended Phase Space | v1: 16 pages, 9 figures; v2: 16 pages, 9 figures, references added | null | 10.1103/PhysRevD.105.064069 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study thermodynamics and phase structure of asymptotically
AdS hairy and Reissner-Nordstr\"{o}m-AdS (RNAdS) black holes in the extended
phase space, where the cosmological constant is interpreted as a thermal
pressure. The RNAdS and hairy black holes are black hole solutions of an
Einstein-Maxwell-s... | [
{
"created": "Fri, 9 Jul 2021 14:33:41 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Jul 2021 13:07:13 GMT",
"version": "v2"
}
] | 2022-04-13 | [
[
"Guo",
"Guangzhou",
""
],
[
"Wang",
"Peng",
""
],
[
"Wu",
"Houwen",
""
],
[
"Yang",
"Haitang",
""
]
] | In this paper, we study thermodynamics and phase structure of asymptotically AdS hairy and Reissner-Nordstr\"{o}m-AdS (RNAdS) black holes in the extended phase space, where the cosmological constant is interpreted as a thermal pressure. The RNAdS and hairy black holes are black hole solutions of an Einstein-Maxwell-sca... |
gr-qc/9405006 | null | B.A.C.C. Bassett, P.K.S. Dunsby and G.F.R. Ellis | Shrinking and the True Power Spectrum at Decoupling | 21 pages, Latex, postscript figures available on request, revised and
enlarged to include a discussion of the doppler peaks | null | null | UCT preprint-94/4 | gr-qc astro-ph | null | In this paper we examine the change in the estimated spatial power spectra at
decoupling due to the effects of our clumpy universe which modify observational
distances. We find that scales at decoupling can be significantly underestmated
in our approximation of neglecting the shear of the ray bundle. We compare our
r... | [
{
"created": "Tue, 3 May 1994 16:32:41 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Oct 1994 13:04:32 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Oct 1994 20:06:06 GMT",
"version": "v3"
}
] | 2009-09-25 | [
[
"Bassett",
"B. A. C. C.",
""
],
[
"Dunsby",
"P. K. S.",
""
],
[
"Ellis",
"G. F. R.",
""
]
] | In this paper we examine the change in the estimated spatial power spectra at decoupling due to the effects of our clumpy universe which modify observational distances. We find that scales at decoupling can be significantly underestmated in our approximation of neglecting the shear of the ray bundle. We compare our res... |
1610.03102 | Andrei Lebed G | Andrei G. Lebed | Inequivalence Between Passive Gravitational Mass and Energy for a
Quantum Body: Theory and Suggested Experiment | Presentation at the 21st International Conference on General
Relativity and Gravitation (New York, USA; July 2016) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, we have suggested some semi-quantitative Hamiltonian for an
electron in a hydrogen atom in a weak gravitational field, which takes into
account quantum effects of electron motion in the atom. We have shown that this
Hamiltonian predicts breakdown of the equivalence between passive electron
gravitational mas... | [
{
"created": "Mon, 10 Oct 2016 21:40:02 GMT",
"version": "v1"
}
] | 2016-10-12 | [
[
"Lebed",
"Andrei G.",
""
]
] | Recently, we have suggested some semi-quantitative Hamiltonian for an electron in a hydrogen atom in a weak gravitational field, which takes into account quantum effects of electron motion in the atom. We have shown that this Hamiltonian predicts breakdown of the equivalence between passive electron gravitational mass ... |
gr-qc/0208037 | Dimitar Mladenov | A.M. Khvedelidze and D.M. Mladenov | Bianchi type I cosmology and the Euler-Calogero-Sutherland model | 13 pages, LaTeX, no figures. V2: Title and abstract slightly changed,
typos corrected. V3: Minor changes, version to appear in Physical Review D | Phys.Rev. D66 (2002) 123504 | 10.1103/PhysRevD.66.123504 | null | gr-qc hep-th math-ph math.MP nlin.SI | null | The Bianchi type I cosmological model is brought into a form where the
evolution of observables is governed by the unconstrained Hamiltonian that
coincides with the Hamiltonian describing the relative motion of particles in
the integrable three-body hyperbolic Euler-Calogero-Sutherland system.
| [
{
"created": "Wed, 14 Aug 2002 15:19:00 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Sep 2002 18:07:36 GMT",
"version": "v2"
},
{
"created": "Sun, 15 Dec 2002 15:57:05 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Khvedelidze",
"A. M.",
""
],
[
"Mladenov",
"D. M.",
""
]
] | The Bianchi type I cosmological model is brought into a form where the evolution of observables is governed by the unconstrained Hamiltonian that coincides with the Hamiltonian describing the relative motion of particles in the integrable three-body hyperbolic Euler-Calogero-Sutherland system. |
1211.7099 | Yosef Zlochower | Carlos O. Lousto, Yosef Zlochower | Nonlinear Gravitational Recoil from the Mergers of Precessing Black-Hole
Binaries | Fix sign error in table 1. Repeated terms dropped in table 5 | Phys. Rev. D 87, 084027 (2013) | 10.1103/PhysRevD.87.084027 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present results from an extensive study of 88 precessing, equal-mass
black-hole binaries with large spins (83 with intrinsic spins of 0.8 and 5 with
intrinsic spins of 0.9)and use these data to model new nonlinear contributions
to the gravitational recoil imparted to the merged black hole. We find a new
effect, th... | [
{
"created": "Thu, 29 Nov 2012 21:46:07 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Feb 2013 20:17:17 GMT",
"version": "v2"
},
{
"created": "Fri, 29 Mar 2013 18:05:17 GMT",
"version": "v3"
},
{
"created": "Sun, 12 Jan 2014 16:24:36 GMT",
"version": "v4"
}
] | 2014-01-14 | [
[
"Lousto",
"Carlos O.",
""
],
[
"Zlochower",
"Yosef",
""
]
] | We present results from an extensive study of 88 precessing, equal-mass black-hole binaries with large spins (83 with intrinsic spins of 0.8 and 5 with intrinsic spins of 0.9)and use these data to model new nonlinear contributions to the gravitational recoil imparted to the merged black hole. We find a new effect, the ... |
1501.02963 | Alejandro Perez | J. Fernando Barbero G. and Alejandro Perez | Quantum Geometry and Black Holes | Contribution to appear in the World Scientific series "100 Years of
General Relativity" edited by A. Ashtekar and J. Pullin | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an overall picture of the advances in the description of black
hole physics from the perspective of loop quantum gravity. After an
introduction that discusses the main conceptual issues we present some details
about the classical and quantum geometry of isolated horizons and their quantum
geometry and then... | [
{
"created": "Tue, 13 Jan 2015 11:28:01 GMT",
"version": "v1"
}
] | 2015-01-14 | [
[
"G.",
"J. Fernando Barbero",
""
],
[
"Perez",
"Alejandro",
""
]
] | We present an overall picture of the advances in the description of black hole physics from the perspective of loop quantum gravity. After an introduction that discusses the main conceptual issues we present some details about the classical and quantum geometry of isolated horizons and their quantum geometry and then u... |
gr-qc/0106040 | Eugen Radu | J.J. van der Bij and Eugen Radu (Faculty of Physics,
Albert-Ludwigs-University, Freiburg, Germany) | Gravitating sphalerons and sphaleron black holes in asymptotically
anti-de Sitter spacetime | 30 pages, LaTeX, 8 Encapsulated PostScript figures | Phys.Rev. D64 (2001) 064020 | 10.1103/PhysRevD.64.064020 | Freiburg-THEP 01/02 | gr-qc | null | Numerical arguments are presented for the existence of spherically symmetric
regular and black hole solutions of the EYMH equations with a negative
cosmological constant. These solutions approach asymptotically the anti-de
Sitter spacetime. The main properties of the solutions and the differences with
respect to the ... | [
{
"created": "Mon, 11 Jun 2001 16:45:30 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"van der Bij",
"J. J.",
"",
"Faculty of Physics,\n Albert-Ludwigs-University, Freiburg, Germany"
],
[
"Radu",
"Eugen",
"",
"Faculty of Physics,\n Albert-Ludwigs-University, Freiburg, Germany"
]
] | Numerical arguments are presented for the existence of spherically symmetric regular and black hole solutions of the EYMH equations with a negative cosmological constant. These solutions approach asymptotically the anti-de Sitter spacetime. The main properties of the solutions and the differences with respect to the as... |
1103.3149 | Adriano Contillo | Adriano Contillo | Inflation in asymptotically safe f(R) theory | Presented at 14th Conference on Recent Developments in Gravity: NEB
14, Ioannina, Greece, 8-11 Jun 2010 | J.Phys.Conf.Ser.283:012009,2011 | 10.1088/1742-6596/283/1/012009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the existence of inflationary solutions in a class of
renormalization group improved polynomial f(R) theories, which have been
studied recently in the context of the asymptotic safety scenario for quantum
gravity. These theories seem to possess a nontrivial ultraviolet fixed point,
where the dimensionful c... | [
{
"created": "Wed, 16 Mar 2011 11:32:46 GMT",
"version": "v1"
}
] | 2011-07-22 | [
[
"Contillo",
"Adriano",
""
]
] | We discuss the existence of inflationary solutions in a class of renormalization group improved polynomial f(R) theories, which have been studied recently in the context of the asymptotic safety scenario for quantum gravity. These theories seem to possess a nontrivial ultraviolet fixed point, where the dimensionful cou... |
1707.06930 | Abhik Kumar Sanyal Dr. | Abhik Kumar Sanyal | Semiclassical gravity with a nonminimally coupled scalar field | 8, pages, 0 figures | International Journal of Modern Physics A, Vol. 10, No. 15,
2231-2240 (1995) | 10.1142/S0217751X9500108X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Semiclassical approximation to the Wheeler-DeWitt equation which corresponds
to gravity with a minimally coupled scalar field has been performed. To the
leading order, vacuum Einstein's equation along with the functional Schrodinger
equation for the matter field, propagating in the background of classical
curved spac... | [
{
"created": "Fri, 21 Jul 2017 15:18:09 GMT",
"version": "v1"
}
] | 2017-07-26 | [
[
"Sanyal",
"Abhik Kumar",
""
]
] | Semiclassical approximation to the Wheeler-DeWitt equation which corresponds to gravity with a minimally coupled scalar field has been performed. To the leading order, vacuum Einstein's equation along with the functional Schrodinger equation for the matter field, propagating in the background of classical curved space ... |
gr-qc/0203067 | Mario La Camera | A. G. Agnese and M. La Camera | Traceless stress-energy and traversable wormholes | revtex4, 7 pages, 1 figure | Nuovo Cim.B117:647-652,2002 | null | null | gr-qc | null | A one-parameter family of static and spherically symmetric solutions to
Einstein equations with a traceless energy-momentum tensor is found. When the
nonzero parameter $\beta$ lies in the open interval $(0,1)$ one obtains
traversable Lorentzian wormholes. One also obtains naked singularities when
either $\beta < 0$ o... | [
{
"created": "Wed, 20 Mar 2002 15:00:17 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Agnese",
"A. G.",
""
],
[
"La Camera",
"M.",
""
]
] | A one-parameter family of static and spherically symmetric solutions to Einstein equations with a traceless energy-momentum tensor is found. When the nonzero parameter $\beta$ lies in the open interval $(0,1)$ one obtains traversable Lorentzian wormholes. One also obtains naked singularities when either $\beta < 0$ or ... |
1810.00003 | Liang Dai | Liang Dai, Shun-Sheng Li, Barak Zackay, Shude Mao, Youjun Lu | Detecting Lensing-Induced Diffraction in Astrophysical Gravitational
Waves | 14 pages including references; 8 figures; comments are welcome | Phys. Rev. D 98, 104029 (2018) | 10.1103/PhysRevD.98.104029 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves emitted from compact binary coalescence can be subject to
wave diffraction if they are gravitationally lensed by an intervening mass
clump whose Schwarzschild timescale matches the wave period. Waves in the
ground-based frequency band $f\sim 10$--$10^3\,$Hz are sensitive to clumps with
masses $M_E... | [
{
"created": "Fri, 28 Sep 2018 18:00:00 GMT",
"version": "v1"
}
] | 2018-11-28 | [
[
"Dai",
"Liang",
""
],
[
"Li",
"Shun-Sheng",
""
],
[
"Zackay",
"Barak",
""
],
[
"Mao",
"Shude",
""
],
[
"Lu",
"Youjun",
""
]
] | Gravitational waves emitted from compact binary coalescence can be subject to wave diffraction if they are gravitationally lensed by an intervening mass clump whose Schwarzschild timescale matches the wave period. Waves in the ground-based frequency band $f\sim 10$--$10^3\,$Hz are sensitive to clumps with masses $M_E \... |
gr-qc/9802012 | Felix Finster | Felix Finster, Joel Smoller, and Shing-Tung Yau | Particle-Like Solutions of the Einstein-Dirac-Maxwell Equations | 7 pages, LaTeX, 3 PostScript figures (published version) | Phys.Lett.A259:431-436,1999 | 10.1016/S0375-9601(99)00457-0 | null | gr-qc hep-th | null | We consider the coupled Einstein-Dirac-Maxwell equations for a static,
spherically symmetric system of two fermions in a singlet spinor state.
Soliton-like solutions are constructed numerically. The stability and the
properties of the ground state solutions are discussed for different values of
the electromagnetic co... | [
{
"created": "Tue, 3 Feb 1998 21:38:22 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Feb 1998 14:51:36 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Aug 1999 21:46:24 GMT",
"version": "v3"
}
] | 2010-11-19 | [
[
"Finster",
"Felix",
""
],
[
"Smoller",
"Joel",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | We consider the coupled Einstein-Dirac-Maxwell equations for a static, spherically symmetric system of two fermions in a singlet spinor state. Soliton-like solutions are constructed numerically. The stability and the properties of the ground state solutions are discussed for different values of the electromagnetic coup... |
1110.3095 | Jose Wadih Maluf Dr. | J. W. Maluf and F. F. Faria | Conformally invariant teleparallel theories of gravity | 10 pages, no figures. We discuss the construction of the teleparallel
version of the Weyl Lagrangian | Phys. Rev. D 85, 027502 (2012) | 10.1103/PhysRevD.85.027502 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the construction of conformal theories of gravity in the realm of
teleparallel theories. We first present a family of conformal theories which
are quadratic in the torsion tensor and are constructed out of the tetrad field
and of a scalar field. For a particular value of a coupling constant, and in
the gau... | [
{
"created": "Thu, 13 Oct 2011 23:48:55 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Oct 2011 22:18:51 GMT",
"version": "v2"
},
{
"created": "Wed, 18 Jan 2012 18:32:48 GMT",
"version": "v3"
}
] | 2012-01-19 | [
[
"Maluf",
"J. W.",
""
],
[
"Faria",
"F. F.",
""
]
] | We analyze the construction of conformal theories of gravity in the realm of teleparallel theories. We first present a family of conformal theories which are quadratic in the torsion tensor and are constructed out of the tetrad field and of a scalar field. For a particular value of a coupling constant, and in the gauge... |
1611.05523 | Andrew J. S. Hamilton | Andrew J. S. Hamilton | A covariant Hamiltonian tetrad approach to numerical relativity | v1: 14 pages. v2: 15 pages. v3: 21 pages, extensive revision, added
discussion of WEBB formalism | Phys. Rev. D 96, 124027 (2017) | 10.1103/PhysRevD.96.124027 | Phys. Rev. D 96, 124027 (2017) | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Hamiltonian approach to the equations of general relativity is proposed
using the powerful mathematical language of multivector-valued differential
forms. In the approach, the gravitational coordinates are the 12 spatial
components of the line interval (the vierbein) including their antisymmetric
parts, and their 1... | [
{
"created": "Thu, 17 Nov 2016 01:25:30 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Mar 2017 21:43:44 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Dec 2017 00:29:04 GMT",
"version": "v3"
}
] | 2017-12-27 | [
[
"Hamilton",
"Andrew J. S.",
""
]
] | A Hamiltonian approach to the equations of general relativity is proposed using the powerful mathematical language of multivector-valued differential forms. In the approach, the gravitational coordinates are the 12 spatial components of the line interval (the vierbein) including their antisymmetric parts, and their 12 ... |
2407.08777 | Andrew R. Liddle | Marina Cort\^es and Andrew R Liddle | Hawking evaporation and the Landauer Principle | 4 pages. Title modified, additional discussion and references | null | null | null | gr-qc cond-mat.stat-mech quant-ph | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We show that Hawking black-hole evaporation saturates the Landauer Principle
of information thermodynamics. Our result implies that information loss
experienced by a black hole during Hawking evaporation takes place as
efficiently as possible. We also extend the analysis to the case of Barrow
entropy as a phenomenolo... | [
{
"created": "Thu, 11 Jul 2024 18:00:02 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Aug 2024 17:14:32 GMT",
"version": "v2"
}
] | 2024-08-13 | [
[
"Cortês",
"Marina",
""
],
[
"Liddle",
"Andrew R",
""
]
] | We show that Hawking black-hole evaporation saturates the Landauer Principle of information thermodynamics. Our result implies that information loss experienced by a black hole during Hawking evaporation takes place as efficiently as possible. We also extend the analysis to the case of Barrow entropy as a phenomenologi... |
1711.07198 | Cosimo Bambi | Hrishikesh Chakrabarty, Carlos A. Benavides-Gallego, Cosimo Bambi,
Leonardo Modesto | Unattainable extended spacetime regions in conformal gravity | 1+10 pages, 2 figures. v2: refereed version | JHEP 1803:013,2018 | 10.1007/JHEP03(2018)013 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Janis-Newman-Winicour metric is a solution of Einstein's gravity
minimally coupled to a real massless scalar field. The $\gamma$-metric is
instead a vacuum solution of Einstein's gravity. These spacetimes have no
horizon and possess a naked singularity at a finite value of the radial
coordinate, where curvature i... | [
{
"created": "Mon, 20 Nov 2017 08:35:47 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Feb 2018 18:08:16 GMT",
"version": "v2"
}
] | 2018-03-08 | [
[
"Chakrabarty",
"Hrishikesh",
""
],
[
"Benavides-Gallego",
"Carlos A.",
""
],
[
"Bambi",
"Cosimo",
""
],
[
"Modesto",
"Leonardo",
""
]
] | The Janis-Newman-Winicour metric is a solution of Einstein's gravity minimally coupled to a real massless scalar field. The $\gamma$-metric is instead a vacuum solution of Einstein's gravity. These spacetimes have no horizon and possess a naked singularity at a finite value of the radial coordinate, where curvature inv... |
2004.07396 | Filipe Mena | Jo\~ao L. Costa and Filipe C. Mena | Global solutions to the spherically symmetric Einstein-scalar field
system with a positive cosmological constant in Bondi coordinates | 25 pages, to appear in Journal of Hyperbolic Differential Equations | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a characteristic initial value problem, with initial data given
on a future null cone, for the Einstein (massless) scalar field system with a
positive cosmological constant, in Bondi coordinates. We prove that, for small
data, this system has a unique global classical solution which is causally
geodesical... | [
{
"created": "Wed, 15 Apr 2020 23:45:43 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Dec 2020 13:25:59 GMT",
"version": "v2"
}
] | 2020-12-29 | [
[
"Costa",
"João L.",
""
],
[
"Mena",
"Filipe C.",
""
]
] | We consider a characteristic initial value problem, with initial data given on a future null cone, for the Einstein (massless) scalar field system with a positive cosmological constant, in Bondi coordinates. We prove that, for small data, this system has a unique global classical solution which is causally geodesically... |
0902.3224 | Jonathan Ziprick | J. Ziprick, G. Kunstatter | Dynamical Singularity Resolution in Spherically Symmetric Black Hole
Formation | 10 pages, 5 figures | Phys.Rev.D80:024032,2009 | 10.1103/PhysRevD.80.024032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study numerically the effects of loop quantum gravity motivated
corrections on massless scalar field collapse in Painlev\'e-Gullstrand
coordinates. Near criticality, the system exhibits Choptuik scaling with the
added features of a mass gap and a new scaling relationship dependant upon the
quantum length scale. Th... | [
{
"created": "Wed, 18 Feb 2009 19:32:06 GMT",
"version": "v1"
}
] | 2009-08-11 | [
[
"Ziprick",
"J.",
""
],
[
"Kunstatter",
"G.",
""
]
] | We study numerically the effects of loop quantum gravity motivated corrections on massless scalar field collapse in Painlev\'e-Gullstrand coordinates. Near criticality, the system exhibits Choptuik scaling with the added features of a mass gap and a new scaling relationship dependant upon the quantum length scale. The ... |
2304.08012 | De-Cheng Zou | Meng-Yun Lai, De-Cheng Zou, Rui-Hong Yue and Yun Soo Myung | Nonlinearly scalarized rotating black holes in
Einstein-scalar-Gauss-Bonnet theory | 23 pages, 8 figures and 2 tables | Phys.Rev.D 108,084007(2023) | 10.1103/PhysRevD.108.084007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we discuss a fully nonlinear mechanism for the formation of
scalarized rotating black holes in Einstein-scalar-Gauss-Bonnet gravity, where
Kerr black holes are linearly stable, but unstable against nonlinear scalar
perturbations. With the help of the pseudospectral method, we obtain a spectrum
of nonli... | [
{
"created": "Mon, 17 Apr 2023 06:22:15 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Oct 2023 05:41:44 GMT",
"version": "v2"
}
] | 2023-10-09 | [
[
"Lai",
"Meng-Yun",
""
],
[
"Zou",
"De-Cheng",
""
],
[
"Yue",
"Rui-Hong",
""
],
[
"Myung",
"Yun Soo",
""
]
] | In this paper, we discuss a fully nonlinear mechanism for the formation of scalarized rotating black holes in Einstein-scalar-Gauss-Bonnet gravity, where Kerr black holes are linearly stable, but unstable against nonlinear scalar perturbations. With the help of the pseudospectral method, we obtain a spectrum of nonline... |
1901.01031 | Rocco D'Agostino | Kuantay Boshkayev, Rocco D'Agostino, Orlando Luongo | Extended logotropic fluids as unified dark energy models | 6 pages, 3 figures | null | 10.1140/epjc/s10052-019-6854-9 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We here study extended classes of logotropic fluids as \textit{unified dark
energy models}. Under the hypothesis of the Anton-Schmidt scenario, we consider
the universe obeying a single fluid whose pressure evolves through a
logarithmic equation of state. This result is in analogy with crystals under
isotropic stress... | [
{
"created": "Fri, 4 Jan 2019 09:42:41 GMT",
"version": "v1"
}
] | 2019-04-16 | [
[
"Boshkayev",
"Kuantay",
""
],
[
"D'Agostino",
"Rocco",
""
],
[
"Luongo",
"Orlando",
""
]
] | We here study extended classes of logotropic fluids as \textit{unified dark energy models}. Under the hypothesis of the Anton-Schmidt scenario, we consider the universe obeying a single fluid whose pressure evolves through a logarithmic equation of state. This result is in analogy with crystals under isotropic stresses... |
1311.1286 | Collin Capano | Collin Capano, Yi Pan, and Alessandra Buonanno | Impact of Higher Harmonics in Searching for Gravitational Waves from
Non-Spinning Binary Black Holes | 22 pages, 11 figures. Version approved by journal | Phys. Rev. D 89, 102003 (2014) | 10.1103/PhysRevD.89.102003 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Current searches for gravitational waves from coalescing binary black holes
(BBH) use templates that only include the dominant harmonic. In this study we
use effective-one-body multipolar waveforms calibrated to numerical-relativity
simulations to quantify the effect of neglecting sub-dominant harmonics on the
sensit... | [
{
"created": "Wed, 6 Nov 2013 04:42:18 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Mar 2014 16:11:32 GMT",
"version": "v2"
}
] | 2014-05-28 | [
[
"Capano",
"Collin",
""
],
[
"Pan",
"Yi",
""
],
[
"Buonanno",
"Alessandra",
""
]
] | Current searches for gravitational waves from coalescing binary black holes (BBH) use templates that only include the dominant harmonic. In this study we use effective-one-body multipolar waveforms calibrated to numerical-relativity simulations to quantify the effect of neglecting sub-dominant harmonics on the sensitiv... |
1303.0531 | Giampiero Esposito Dr. | Donato Bini, Giampiero Esposito, Claus Kiefer, Manuel Kraemer,
Francesco Pessina | On the modification of the cosmic microwave background anisotropy
spectrum from canonical quantum gravity | 13 pages, 7 figures. The presentation has been improved | Physical Review D87, 104008 (2013) | 10.1103/PhysRevD.87.104008 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We evaluate the modifications to the cosmic microwave background anisotropy
spectrum that result from a semiclassical expansion of the Wheeler-DeWitt
equation. Recently, such an investigation in the case of a real scalar field
coupled to gravity, has led to the prediction that the power at large scales is
suppressed.... | [
{
"created": "Sun, 3 Mar 2013 17:11:56 GMT",
"version": "v1"
},
{
"created": "Mon, 6 May 2013 06:08:50 GMT",
"version": "v2"
}
] | 2015-06-15 | [
[
"Bini",
"Donato",
""
],
[
"Esposito",
"Giampiero",
""
],
[
"Kiefer",
"Claus",
""
],
[
"Kraemer",
"Manuel",
""
],
[
"Pessina",
"Francesco",
""
]
] | We evaluate the modifications to the cosmic microwave background anisotropy spectrum that result from a semiclassical expansion of the Wheeler-DeWitt equation. Recently, such an investigation in the case of a real scalar field coupled to gravity, has led to the prediction that the power at large scales is suppressed. W... |
2404.17798 | Patrick Das Gupta | Patrick Das Gupta | Torsion and Chern-Simons gravity in 4D space-times from a
Geometrodynamical four-form | To appear in the Proceedings of the Third Minkowski Meeting that was
held at Albena (Bulgaria) in September, 2023 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The space-time geometry in any inertial frame is described by the
line-element $ds^2= \eta_{\mu \nu} dx^\mu dx^\nu$. Now, not only the Minkowski
metric $\eta_{\mu \nu} $ is invariant under proper Lorentz transformations, the
totally antisymmetric Levi-Civita tensor $e_{\mu \nu \alpha \beta} $ too is. In
general relat... | [
{
"created": "Sat, 27 Apr 2024 06:36:04 GMT",
"version": "v1"
},
{
"created": "Wed, 8 May 2024 06:45:34 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Jul 2024 06:16:10 GMT",
"version": "v3"
}
] | 2024-07-08 | [
[
"Gupta",
"Patrick Das",
""
]
] | The space-time geometry in any inertial frame is described by the line-element $ds^2= \eta_{\mu \nu} dx^\mu dx^\nu$. Now, not only the Minkowski metric $\eta_{\mu \nu} $ is invariant under proper Lorentz transformations, the totally antisymmetric Levi-Civita tensor $e_{\mu \nu \alpha \beta} $ too is. In general relativ... |
2004.12970 | Rahul Kumar | Rahul Kumar, Shafqat Ul Islam, and Sushant G. Ghosh | Gravitational lensing by charged black hole in regularized $4D$
Einstein-Gauss-Bonnet gravity | 13 pages, 10 figures, and 1 table. Typos corrected and minor changes
made. Version accepted in EPJC | null | 10.1140/epjc/s10052-020-08606-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Among the higher curvature gravities, the most extensively studied theory is
the so-called Einstein-Gauss-Bonnet (EGB) gravity, whose Lagrangian contains
Einstein term with the GB combination of quadratic curvature terms, and the GB
term yields nontrivial gravitational dynamics in $ D\geq5$. Recently there has
been a... | [
{
"created": "Mon, 27 Apr 2020 17:24:24 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Oct 2020 11:30:37 GMT",
"version": "v2"
}
] | 2020-12-30 | [
[
"Kumar",
"Rahul",
""
],
[
"Islam",
"Shafqat Ul",
""
],
[
"Ghosh",
"Sushant G.",
""
]
] | Among the higher curvature gravities, the most extensively studied theory is the so-called Einstein-Gauss-Bonnet (EGB) gravity, whose Lagrangian contains Einstein term with the GB combination of quadratic curvature terms, and the GB term yields nontrivial gravitational dynamics in $ D\geq5$. Recently there has been a s... |
2201.01939 | Brett McInnes | Brett McInnes | Planar Black Holes as a Route to Understanding the Weak Gravity
Conjecture | Non-dependence of results on energy conditions stressed; 18 pages, no
figures; version appearing in NPB | Nuclear Physics B Volume 983 (2022) 115933 Volume 983, October
2022, 115933 | 10.1016/j.nuclphysb.2022.115933 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One version of the Weak Gravity Conjecture requires that it should be
possible for an extremal black hole to emit a smaller black hole: that is, the
original black hole bifurcates. For asymptotically flat and asymptotically AdS
Reissner-Nordstr\"{o}m black holes with spherical event horizons, such a
bifurcation reduc... | [
{
"created": "Thu, 6 Jan 2022 06:51:33 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Apr 2022 07:56:42 GMT",
"version": "v2"
},
{
"created": "Fri, 12 Aug 2022 05:32:51 GMT",
"version": "v3"
}
] | 2022-08-31 | [
[
"McInnes",
"Brett",
""
]
] | One version of the Weak Gravity Conjecture requires that it should be possible for an extremal black hole to emit a smaller black hole: that is, the original black hole bifurcates. For asymptotically flat and asymptotically AdS Reissner-Nordstr\"{o}m black holes with spherical event horizons, such a bifurcation reduces... |
gr-qc/0306031 | Eugene J. Surowitz | E. L. Schucking, E. J. Surowitz, J. Zhao | A Diagram for Bianchi A-Types | 15 Latex pages, 3 encapsulated postscript figures, GRG in print | Gen.Rel.Grav. vol.35 #9 (2003) 1521-1530 | 10.1023/A:1025757215254 | null | gr-qc | null | A diagram for Bianchi spaces with vanishing vector of structure constants
(type A in the Ellis-MacCallum classification) illustrates the relations among
their different types under similarity transformations. The Ricci coefficients
and the Ricci tensor are related by a Cremona transformation.
| [
{
"created": "Mon, 9 Jun 2003 19:18:10 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Jun 2003 20:02:16 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Schucking",
"E. L.",
""
],
[
"Surowitz",
"E. J.",
""
],
[
"Zhao",
"J.",
""
]
] | A diagram for Bianchi spaces with vanishing vector of structure constants (type A in the Ellis-MacCallum classification) illustrates the relations among their different types under similarity transformations. The Ricci coefficients and the Ricci tensor are related by a Cremona transformation. |
1603.07864 | Farhad Darabi | F. Darabi, F. Felegary, M. R. Setare | Cosmological Dynamics of Interacting Logarithmic Entropy Corrected
Holographic Dark Energy Model | 8 pages, Published online, Int. J. Mod. Phys. D (2016) | Int. J. Mod. Phys. D, 1650104 (2016) | 10.1142/S0218271816501042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the cosmological dynamics of interacting Logarithmic Entropy
Corrected Holographic Dark Energy model with Cold Dark Matter. Fixed points are
determined and their corresponding cosmological models are presented. Moreover,
the dynamical properties of these fixed points are derived.
| [
{
"created": "Fri, 25 Mar 2016 10:01:20 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Aug 2016 10:27:22 GMT",
"version": "v2"
}
] | 2016-09-27 | [
[
"Darabi",
"F.",
""
],
[
"Felegary",
"F.",
""
],
[
"Setare",
"M. R.",
""
]
] | We investigate the cosmological dynamics of interacting Logarithmic Entropy Corrected Holographic Dark Energy model with Cold Dark Matter. Fixed points are determined and their corresponding cosmological models are presented. Moreover, the dynamical properties of these fixed points are derived. |
1409.0809 | Pierre-Andr\'e Mandrin Ph.D. | Pierre A. Mandrin | An improved derivation of minimum information quantum gravity | 21 pages. v2: more details in the proof of the space-time structure;
text improved; some parts transfered to appendix, added by summaries of some
previously published concepts, a few formulations more comprehensive.
Prepared for submission to Annals of Physics. v3: Minor revision (boundary
law: "non-thin-layers... | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Minimum information quantum gravity (MIQG) is a theory of quantum gravity
which requires no explicit microscopic quantum structure. In this article, it
is shown that the MIQG action can be derived using a more elegant and
straight-forward method than in the first existence proof. The required
assumptions are dramatic... | [
{
"created": "Tue, 2 Sep 2014 18:07:50 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Oct 2014 15:04:53 GMT",
"version": "v2"
},
{
"created": "Fri, 2 Jan 2015 20:07:39 GMT",
"version": "v3"
}
] | 2015-01-05 | [
[
"Mandrin",
"Pierre A.",
""
]
] | Minimum information quantum gravity (MIQG) is a theory of quantum gravity which requires no explicit microscopic quantum structure. In this article, it is shown that the MIQG action can be derived using a more elegant and straight-forward method than in the first existence proof. The required assumptions are dramatical... |
1103.5183 | Kentaro Tanabe | Kentaro Tanabe, Tetsuya Shiromizu | Asymptotic structure at timelike infinity: higher orders | 19 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bearing the final fate of gravitational collapse in mind, we study the
asymptotic structures at timelike infinity in four dimensions. Assuming that
spacetimes are asymptotically stationary, we will examine the asymptotic
structure of asymptotic stationary spacetimes in a systematic way. Then we see
that the asymptoti... | [
{
"created": "Sun, 27 Mar 2011 04:43:36 GMT",
"version": "v1"
}
] | 2011-03-29 | [
[
"Tanabe",
"Kentaro",
""
],
[
"Shiromizu",
"Tetsuya",
""
]
] | Bearing the final fate of gravitational collapse in mind, we study the asymptotic structures at timelike infinity in four dimensions. Assuming that spacetimes are asymptotically stationary, we will examine the asymptotic structure of asymptotic stationary spacetimes in a systematic way. Then we see that the asymptotic ... |
1106.2278 | Evan Halstead | Evan Halstead and Peng Hao | Time Evolution of Temperature and Entropy of a Gravitationally
Collapsing Cylinder | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the time evolution of the temperature and entropy of a
gravitationally collapsing cylinder, represented by an infinitely thin domain
wall, as seen by an asymptotic observer. Previous work has shown that the
entropy of a spherically symmetric collapsing domain approaches a constant, and
we follow this p... | [
{
"created": "Sun, 12 Jun 2011 05:26:25 GMT",
"version": "v1"
}
] | 2011-06-14 | [
[
"Halstead",
"Evan",
""
],
[
"Hao",
"Peng",
""
]
] | We investigate the time evolution of the temperature and entropy of a gravitationally collapsing cylinder, represented by an infinitely thin domain wall, as seen by an asymptotic observer. Previous work has shown that the entropy of a spherically symmetric collapsing domain approaches a constant, and we follow this pro... |
2301.02722 | Gabriel S\'anchez-P\'erez | Marc Mars and Gabriel S\'anchez-P\'erez | Covariant definition of Double Null Data and geometric uniqueness of the
characteristic initial value problem | 36 pages, 1 figure | Journal of Physics A: Mathematical and Theoretical, Volume 56,
Number 25, 2023 | 10.1088/1751-8121/acd312 | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The characteristic Cauchy problem of the Einstein field equations has been
recently addressed from a completely abstract viewpoint by means of
hypersurface data and, in particular, via the notion of double null data.
However, this definition was given in a partially gauge-fixed form. In this
paper we generalize the n... | [
{
"created": "Fri, 6 Jan 2023 21:40:10 GMT",
"version": "v1"
},
{
"created": "Tue, 30 May 2023 11:45:36 GMT",
"version": "v2"
}
] | 2023-05-31 | [
[
"Mars",
"Marc",
""
],
[
"Sánchez-Pérez",
"Gabriel",
""
]
] | The characteristic Cauchy problem of the Einstein field equations has been recently addressed from a completely abstract viewpoint by means of hypersurface data and, in particular, via the notion of double null data. However, this definition was given in a partially gauge-fixed form. In this paper we generalize the not... |
0906.3751 | Tomasz Pawlowski | Mercedes Martin-Benito, Guillermo A. Mena Marugan, Tomasz Pawlowski | Physical evolution in Loop Quantum Cosmology: The example of vacuum
Bianchi I | RevTex4, 22 pages, 4 figures | Phys.Rev.D80:084038,2009 | 10.1103/PhysRevD.80.084038 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the vacuum Bianchi I model as an example to investigate the concept of
physical evolution in Loop Quantum Cosmology (LQC) in the absence of the
massless scalar field which has been used so far in the literature as an
internal time. In order to retrieve the system dynamics when no such a suitable
clock field is... | [
{
"created": "Mon, 22 Jun 2009 16:03:35 GMT",
"version": "v1"
}
] | 2009-11-05 | [
[
"Martin-Benito",
"Mercedes",
""
],
[
"Marugan",
"Guillermo A. Mena",
""
],
[
"Pawlowski",
"Tomasz",
""
]
] | We use the vacuum Bianchi I model as an example to investigate the concept of physical evolution in Loop Quantum Cosmology (LQC) in the absence of the massless scalar field which has been used so far in the literature as an internal time. In order to retrieve the system dynamics when no such a suitable clock field is p... |
2004.07420 | Jens Boos | Jens Boos, Jose Pinedo Soto, Valeri P. Frolov | Ultrarelativistic spinning objects in non-local ghost-free gravity | v2: 13 pages, 2 figures, matches published version, title changed
slightly and references added; v1: 13 pages, 2 figures, computer algebra code
available at http://spintwo.net/static/2020.04.14/ | Phys. Rev. D 101, 124065 (2020) | 10.1103/PhysRevD.101.124065 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the gravitational field of ultrarelativistic spinning objects
(gyratons) in a modified gravity theory with higher derivatives. In particular,
we focus on a special class of such theories with an infinite number of
derivatives known as "ghost-free gravity" that include a non-local form factor
such as $\exp(-\... | [
{
"created": "Thu, 16 Apr 2020 02:12:36 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Jun 2020 15:12:51 GMT",
"version": "v2"
}
] | 2020-07-08 | [
[
"Boos",
"Jens",
""
],
[
"Soto",
"Jose Pinedo",
""
],
[
"Frolov",
"Valeri P.",
""
]
] | We study the gravitational field of ultrarelativistic spinning objects (gyratons) in a modified gravity theory with higher derivatives. In particular, we focus on a special class of such theories with an infinite number of derivatives known as "ghost-free gravity" that include a non-local form factor such as $\exp(-\Bo... |
gr-qc/0504091 | Suresh Maran k | Suresh K Maran | The Area Metric Reality Constraint in Classical General Relativity | The title has been changed. A new section on the simplicial
discretization of the area metric reality constraint and GR actions has been
introduced. Certain errors in field equations has been corrected. English has
been improved, sections edited and reorganized | null | null | null | gr-qc | null | A classical foundation for an idea of reality condition in the context of
spin foams (Barrett-Crane models) is developed. I extract classical real
general relativity (all signatures) from complex general relativity by imposing
the area metric reality constraint; the area metric is real iff a
non-degenerate metric is ... | [
{
"created": "Wed, 20 Apr 2005 19:32:15 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Sep 2005 19:25:51 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Sep 2005 18:44:43 GMT",
"version": "v3"
},
{
"created": "Sun, 25 Sep 2005 21:48:15 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Maran",
"Suresh K",
""
]
] | A classical foundation for an idea of reality condition in the context of spin foams (Barrett-Crane models) is developed. I extract classical real general relativity (all signatures) from complex general relativity by imposing the area metric reality constraint; the area metric is real iff a non-degenerate metric is re... |
2011.05145 | Varun Behera | Varun Nagesh Jolly Behera, Anik Kumar Samanta, Aurobinda Routray | Frequency Estimation of Gravitational Waves from a Binary Black Hole
Merger | arXiv admin note: text overlap with arXiv:1609.05933,
arXiv:1810.00040 by other authors | null | null | null | gr-qc astro-ph.HE physics.data-an | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is a collection of literature reviews and some initial work on the
estimation of the frequency of gravitational waves from a binary black hole
merger for low SNR. This document provides a starting point, with a broad
overview of the prerequisites required for the follow-up work on frequency
estimation.
| [
{
"created": "Mon, 9 Nov 2020 05:59:01 GMT",
"version": "v1"
}
] | 2020-11-11 | [
[
"Behera",
"Varun Nagesh Jolly",
""
],
[
"Samanta",
"Anik Kumar",
""
],
[
"Routray",
"Aurobinda",
""
]
] | This is a collection of literature reviews and some initial work on the estimation of the frequency of gravitational waves from a binary black hole merger for low SNR. This document provides a starting point, with a broad overview of the prerequisites required for the follow-up work on frequency estimation. |
2004.04700 | R Loll | N. Klitgaard, R. Loll, Marcus Reitz and Reiko Toriumi | Geometric flux formula for the gravitational Wilson loop | 36 pages, 5 figures; minor text changes, clarifying the role of
diffeomorphism invariance; agrees with published version | Classical and Quantum Gravity (2020) | 10.1088/1361-6382/abb874 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Finding diffeomorphism-invariant observables to characterize the properties
of gravity and spacetime at the Planck scale is essential for making progress
in quantum gravity. The holonomy and Wilson loop of the Levi-Civita connection
are potentially interesting ingredients in the construction of quantum
curvature obse... | [
{
"created": "Thu, 9 Apr 2020 17:28:58 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Sep 2020 11:32:41 GMT",
"version": "v2"
}
] | 2020-09-24 | [
[
"Klitgaard",
"N.",
""
],
[
"Loll",
"R.",
""
],
[
"Reitz",
"Marcus",
""
],
[
"Toriumi",
"Reiko",
""
]
] | Finding diffeomorphism-invariant observables to characterize the properties of gravity and spacetime at the Planck scale is essential for making progress in quantum gravity. The holonomy and Wilson loop of the Levi-Civita connection are potentially interesting ingredients in the construction of quantum curvature observ... |
0907.4851 | Dr. Anirudh Pradhan | Anirudh Pradhan, Shyam Sundar Kumhar, Padmini Yadav and Kanti Jotania | A New Class of LRS Bianchi Type ${\rm VI}_{0}$ Universes with Free
Gravitational Field and Decaying Vacuum Energy Density | 16 pages, 9 figures, minor corrections in figures. arXiv admin note:
text overlap with arXiv:gr-qc/0010016 by other author | Int. J. Math. Eng. Sci. (IJMES), 1:74-89, 2012 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new class of LRS Bianchi type ${\rm VI}_{0}$ cosmological models with free
gravitational fields and a variable cosmological term is investigated in
presence of perfect fluid as well as bulk viscous fluid. To get the
deterministic solution we have imposed the two different conditions over the
free gravitational fiel... | [
{
"created": "Tue, 28 Jul 2009 07:33:36 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Feb 2012 13:09:32 GMT",
"version": "v2"
}
] | 2012-04-13 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Kumhar",
"Shyam Sundar",
""
],
[
"Yadav",
"Padmini",
""
],
[
"Jotania",
"Kanti",
""
]
] | A new class of LRS Bianchi type ${\rm VI}_{0}$ cosmological models with free gravitational fields and a variable cosmological term is investigated in presence of perfect fluid as well as bulk viscous fluid. To get the deterministic solution we have imposed the two different conditions over the free gravitational fields... |
1204.3566 | Jozef Skakala | Jozef Skakala | Quasi-normal modes, area spectra and multi-horizon spacetimes | 8 pages, v2: no physics changed, some references added, few sentences
added in the discussion parts | JHEP 1206:094, 2012 | 10.1007/JHEP06(2012)094 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We suggest an interpretation for the highly damped QNM frequencies of the
spherically symmetric multi-horizon spacetimes (Reissner-Nordstrom,
Schwarzschild-deSitter, Reissner-Nordstrom-deSitter) following Maggiore's
proposal about the link between the asymptotic QNM frequencies and the black
hole thermodynamics. We s... | [
{
"created": "Mon, 16 Apr 2012 16:48:44 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Apr 2012 20:16:46 GMT",
"version": "v2"
}
] | 2012-06-21 | [
[
"Skakala",
"Jozef",
""
]
] | We suggest an interpretation for the highly damped QNM frequencies of the spherically symmetric multi-horizon spacetimes (Reissner-Nordstrom, Schwarzschild-deSitter, Reissner-Nordstrom-deSitter) following Maggiore's proposal about the link between the asymptotic QNM frequencies and the black hole thermodynamics. We sho... |
1609.08604 | Rodrigo Panosso Macedo | Yu-Chun Pynn, Rodrigo Panosso Macedo, Martin Breithaupt, Stefan
Palenta, Reinhard Meinel | Gyromagnetic factor of rotating disks of electrically charged dust in
general relativity | 10 pages, 4 figures (typos corrected) | Phys. Rev. D 94, 104035 (2016) | 10.1103/PhysRevD.94.104035 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculated the dimensionless gyromagnetic ratio ("$g$-factor") of
self-gravitating, uniformly rotating disks of dust with a constant specific
charge $\epsilon$. These disk solutions to the Einstein-Maxwell equations
depend on $\epsilon$ and a "relativity parameter" $\gamma$ ($0<\gamma\le 1$) up
to a scaling parame... | [
{
"created": "Tue, 27 Sep 2016 19:59:57 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Oct 2016 08:02:40 GMT",
"version": "v2"
}
] | 2016-11-16 | [
[
"Pynn",
"Yu-Chun",
""
],
[
"Macedo",
"Rodrigo Panosso",
""
],
[
"Breithaupt",
"Martin",
""
],
[
"Palenta",
"Stefan",
""
],
[
"Meinel",
"Reinhard",
""
]
] | We calculated the dimensionless gyromagnetic ratio ("$g$-factor") of self-gravitating, uniformly rotating disks of dust with a constant specific charge $\epsilon$. These disk solutions to the Einstein-Maxwell equations depend on $\epsilon$ and a "relativity parameter" $\gamma$ ($0<\gamma\le 1$) up to a scaling paramete... |
gr-qc/0501091 | Aleksandar Mikovic | A. Mikovic | New Spin Foam Models of Quantum Gravity | 9 pages, talk given at the Workshop on Quantum Gravity and
Noncommutative geometry, Lusofona University, 20 - 23 July 2004, Lisbon | Mod.Phys.Lett.A20:1305,2005 | 10.1142/S0217732305017779 | null | gr-qc | null | We give a brief and a critical review of the Barret-Crane spin foam models of
quantum gravity. Then we describe two new spin foam models which are obtained
by direct quantization of General Relativity and do not have some of the
drawbacks of the Barret-Crane models. These are the model of spin foam
invariants for the... | [
{
"created": "Fri, 28 Jan 2005 11:04:40 GMT",
"version": "v1"
}
] | 2009-01-16 | [
[
"Mikovic",
"A.",
""
]
] | We give a brief and a critical review of the Barret-Crane spin foam models of quantum gravity. Then we describe two new spin foam models which are obtained by direct quantization of General Relativity and do not have some of the drawbacks of the Barret-Crane models. These are the model of spin foam invariants for the e... |
gr-qc/0611127 | Ignacio Navarro | I. Navarro, K. Van Acoleyen | f(R) actions, cosmic acceleration and local tests of gravity | 26 pages | JCAP 0702:022,2007 | 10.1088/1475-7516/2007/02/022 | DAMTP-2006-115 | gr-qc astro-ph hep-ph hep-th | null | We study spherically symmetric solutions in f(R) theories and its
compatibility with local tests of gravity. We start by clarifying the range of
validity of the weak field expansion and show that for many models proposed to
address the Dark Energy problem this expansion breaks down in realistic
situations. This inval... | [
{
"created": "Thu, 23 Nov 2006 19:21:58 GMT",
"version": "v1"
}
] | 2010-10-27 | [
[
"Navarro",
"I.",
""
],
[
"Van Acoleyen",
"K.",
""
]
] | We study spherically symmetric solutions in f(R) theories and its compatibility with local tests of gravity. We start by clarifying the range of validity of the weak field expansion and show that for many models proposed to address the Dark Energy problem this expansion breaks down in realistic situations. This invalid... |
1907.06463 | Davide Batic | Davide Batic and N. G. Kelkar and Marek Nowakowski and Karlus Redway | Perturbing microscopic black holes inspired by noncommutativity | 14 pages, 6 figures, reference added | The European Physical Journal C 79: 581 (2019) | 10.1140/epjc/s10052-019-7084-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We probe into the instabilities of microscopic quantum black holes. For this
purpose, we study the quasinormal modes (QNMs) for a massless scalar
perturbation of the noncommutative geometry inspired Schwarzschild black hole.
By means of a sixth order Wentzel-Kramers-Brillouin (WKB) approximation we show
that the wide... | [
{
"created": "Mon, 15 Jul 2019 12:20:44 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jul 2019 16:45:37 GMT",
"version": "v2"
}
] | 2019-07-24 | [
[
"Batic",
"Davide",
""
],
[
"Kelkar",
"N. G.",
""
],
[
"Nowakowski",
"Marek",
""
],
[
"Redway",
"Karlus",
""
]
] | We probe into the instabilities of microscopic quantum black holes. For this purpose, we study the quasinormal modes (QNMs) for a massless scalar perturbation of the noncommutative geometry inspired Schwarzschild black hole. By means of a sixth order Wentzel-Kramers-Brillouin (WKB) approximation we show that the widely... |
2407.01673 | Sijia Wang | Sijia Wang, Mar\'ia Rosa Preciado-Rivas, Massimilano Spadafora, Robert
B. Mann | Singular Excitement Beyond the Horizon of a Rotating Black Hole | null | null | null | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | Previous studies have shown that an Unruh-DeWitt (UDW) detector, when coupled
linearly to a massless scalar field and permitted to fall radially into certain
black holes, will exhibit non-monotonicity in its transition properties near
the horizon. Specifically, the transition probability of a detector freely
falling ... | [
{
"created": "Mon, 1 Jul 2024 18:00:01 GMT",
"version": "v1"
}
] | 2024-07-08 | [
[
"Wang",
"Sijia",
""
],
[
"Preciado-Rivas",
"María Rosa",
""
],
[
"Spadafora",
"Massimilano",
""
],
[
"Mann",
"Robert B.",
""
]
] | Previous studies have shown that an Unruh-DeWitt (UDW) detector, when coupled linearly to a massless scalar field and permitted to fall radially into certain black holes, will exhibit non-monotonicity in its transition properties near the horizon. Specifically, the transition probability of a detector freely falling in... |
1004.1805 | Kayoomars Karami | K. Karami, M.S. Khaledian | Reconstructing f(R) modified gravity from ordinary and entropy-corrected
versions of the holographic and new agegraphic dark energy models | 17 pages, accepted for publication in JHEP | JHEP 1103:086,2011 | 10.1007/JHEP03(2011)086 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here, we peruse cosmological usage of the most promising candidates of dark
energy in the framework of f(R) theory. We reconstruct the different f(R)
modified gravity models in the spatially flat FRW universe according to the
ordinary and entropy-corrected versions of the holographic and new agegraphic
dark energy mo... | [
{
"created": "Sun, 11 Apr 2010 12:57:36 GMT",
"version": "v1"
},
{
"created": "Mon, 10 May 2010 07:43:26 GMT",
"version": "v2"
},
{
"created": "Sun, 13 Mar 2011 18:23:28 GMT",
"version": "v3"
}
] | 2011-07-18 | [
[
"Karami",
"K.",
""
],
[
"Khaledian",
"M. S.",
""
]
] | Here, we peruse cosmological usage of the most promising candidates of dark energy in the framework of f(R) theory. We reconstruct the different f(R) modified gravity models in the spatially flat FRW universe according to the ordinary and entropy-corrected versions of the holographic and new agegraphic dark energy mode... |
gr-qc/0307093 | Michael A. Ivanov | Michael A. Ivanov | A fine quantum mechanism of classical gravity | 9 pages, LaTeX. Contribution to the Tenth Marcel Grossmann Meeting
(MG10), 20-26 July 2003, Rio de Janeiro, Brazil | In the book in Russian "Searches for a mechanism of gravity", Eds.
M.A. Ivanov and L.A. Savrov, Nizhny Novgorod, Yu.A. Nickolaev Publisher,
2004, pp 274-281 | null | null | gr-qc | null | It is shown that screening the background of super-strong interacting
gravitons ensures the Newtonian attraction, if a part of single gravitons is
pairing and graviton pairs are destructed by collisions with a body. If the
considered quantum mechanism of classical gravity is realized in the nature,
than an existence ... | [
{
"created": "Mon, 21 Jul 2003 14:36:06 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Ivanov",
"Michael A.",
""
]
] | It is shown that screening the background of super-strong interacting gravitons ensures the Newtonian attraction, if a part of single gravitons is pairing and graviton pairs are destructed by collisions with a body. If the considered quantum mechanism of classical gravity is realized in the nature, than an existence of... |
1405.7702 | Shahar Hod | Shahar Hod | Onset of superradiant instabilities in the hydrodynamic vortex model | 5 pages | Physical Review D 90, 027501B (2014) | 10.1103/PhysRevD.90.027501 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The hydrodynamic vortex, an effective spacetime geometry for propagating
sound waves, is studied analytically. In contrast with the familiar Kerr
black-hole spacetime, the hydrodynamic vortex model is described by an
effective acoustic geometry which has no horizons. However, this acoustic
spacetime possesses an ergo... | [
{
"created": "Thu, 29 May 2014 20:00:15 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Jul 2014 20:06:30 GMT",
"version": "v2"
}
] | 2015-06-19 | [
[
"Hod",
"Shahar",
""
]
] | The hydrodynamic vortex, an effective spacetime geometry for propagating sound waves, is studied analytically. In contrast with the familiar Kerr black-hole spacetime, the hydrodynamic vortex model is described by an effective acoustic geometry which has no horizons. However, this acoustic spacetime possesses an ergore... |
gr-qc/0506053 | Valery Kiselev | V.V.Kiselev | Entropy of BTZ black hole and its spectrum by quantum radial geodesics
behind horizons | 6 pages, 2 eps-figures, revtex4 class | Phys.Rev. D73 (2006) 104018 | 10.1103/PhysRevD.73.104018 | null | gr-qc astro-ph hep-th | null | In the framework of thermal quantization of radial geodesics completely
confined behind the horizons we calculate the entropy of BTZ black hole in
agreement with the Bekenstein--Hawking relation. Particles in the BTZ black
hole occupy the only quantum ground level. The quantization allow us to find a
linear dependenc... | [
{
"created": "Thu, 9 Jun 2005 07:29:53 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Kiselev",
"V. V.",
""
]
] | In the framework of thermal quantization of radial geodesics completely confined behind the horizons we calculate the entropy of BTZ black hole in agreement with the Bekenstein--Hawking relation. Particles in the BTZ black hole occupy the only quantum ground level. The quantization allow us to find a linear dependence ... |
2012.04450 | Bayram Tekin | Emel Altas, Bayram Tekin | Approximate analytical description of apparent horizons for initial data
with momentum and spin | 11 pages, 1 figure, v2 matches the published form | Phys. Rev. D 103, 084036 (2021) | 10.1103/PhysRevD.103.084036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct analytical initial data for a slowly moving and rotating black
hole for generic orientations of the linear momentum and the spin. We solve the
Hamiltonian constraint approximately and work out the properties of the
apparent horizon and show the dependence of its shape on the angle between the
spin and th... | [
{
"created": "Tue, 8 Dec 2020 14:37:42 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Apr 2021 07:21:36 GMT",
"version": "v2"
}
] | 2021-04-23 | [
[
"Altas",
"Emel",
""
],
[
"Tekin",
"Bayram",
""
]
] | We construct analytical initial data for a slowly moving and rotating black hole for generic orientations of the linear momentum and the spin. We solve the Hamiltonian constraint approximately and work out the properties of the apparent horizon and show the dependence of its shape on the angle between the spin and the ... |
2408.06582 | Mian Zhu | Mian Zhu and Taotao Qiu | Interpretating Pulsar Timing Array data of Gravitational Waves with
Ekpyrosis-Bouncing Cosmology | 24 pages, 4 figures and 1 table | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent pulsar timing array (PTA) experiments have reported strong evidence of
the stochastic gravitational wave background (SGWB). If interpreted as
primordial Gravitational Waves (pGWs), the signal favors a strongly blue-tilted
spectrum. On the other hand, the Ekpyrosis-bouncing cosmology with a strongly
blue-tilted... | [
{
"created": "Tue, 13 Aug 2024 02:42:21 GMT",
"version": "v1"
}
] | 2024-08-14 | [
[
"Zhu",
"Mian",
""
],
[
"Qiu",
"Taotao",
""
]
] | Recent pulsar timing array (PTA) experiments have reported strong evidence of the stochastic gravitational wave background (SGWB). If interpreted as primordial Gravitational Waves (pGWs), the signal favors a strongly blue-tilted spectrum. On the other hand, the Ekpyrosis-bouncing cosmology with a strongly blue-tilted G... |
1111.3605 | Jonathan R. Gair | Jonathan R Gair, Nicolas Yunes and Carl M Bender | Resonances in Extreme Mass-Ratio Inspirals: Asymptotic and
Hyperasymptotic Analysis | 12 pages, 3 figures, submitted to JMP | null | 10.1063/1.3691226 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An expected source of gravitational waves for future detectors in space are
the inspirals of small compact objects into much more massive black holes.
These sources have the potential to provide a wealth of information about
astronomy and fundamental physics. On short timescales the orbit of the small
object is appro... | [
{
"created": "Tue, 15 Nov 2011 18:22:23 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Gair",
"Jonathan R",
""
],
[
"Yunes",
"Nicolas",
""
],
[
"Bender",
"Carl M",
""
]
] | An expected source of gravitational waves for future detectors in space are the inspirals of small compact objects into much more massive black holes. These sources have the potential to provide a wealth of information about astronomy and fundamental physics. On short timescales the orbit of the small object is approxi... |
gr-qc/9901014 | David Wands | Robert J. van den Hoogen, Alan A. Coley and David Wands | Scaling Solutions in Robertson-Walker Spacetimes | 8 pages, no figures, latex with revtex | Class.Quant.Grav.16:1843-1851,1999 | 10.1088/0264-9381/16/6/317 | null | gr-qc | null | We investigate the stability of cosmological scaling solutions describing a
barotropic fluid with $p=(\gamma-1)\rho$ and a non-interacting scalar field
$\phi$ with an exponential potential $V(\phi)=V_0\e^{-\kappa\phi}$. We study
homogeneous and isotropic spacetimes with non-zero spatial curvature and find
three possi... | [
{
"created": "Thu, 7 Jan 1999 10:14:21 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Hoogen",
"Robert J. van den",
""
],
[
"Coley",
"Alan A.",
""
],
[
"Wands",
"David",
""
]
] | We investigate the stability of cosmological scaling solutions describing a barotropic fluid with $p=(\gamma-1)\rho$ and a non-interacting scalar field $\phi$ with an exponential potential $V(\phi)=V_0\e^{-\kappa\phi}$. We study homogeneous and isotropic spacetimes with non-zero spatial curvature and find three possibl... |
0902.2720 | Sebastiano Bernuzzi | Sebastiano Bernuzzi, Luca Baiotti, Giovanni Corvino, Roberto De
Pietri, Alessandro Nagar | Gravitational-wave extraction from neutron-star oscillations | null | Proceedings of the Third Stueckelberg Workshop on Relativistic
Field Theories, 2010, Cambridge Scientific Publishers, p.97 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compare different gravitational-wave extraction methods used in
three-dimensional nonlinear simulations against linear simulations of
perturbations of spherical spacetimes with matter. We present results from
fully general-relativistic simulations of a system composed by an oscillating
and non-rotating star emitti... | [
{
"created": "Mon, 16 Feb 2009 16:03:13 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Feb 2009 17:05:23 GMT",
"version": "v2"
},
{
"created": "Fri, 12 Aug 2011 16:40:17 GMT",
"version": "v3"
}
] | 2015-03-13 | [
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Baiotti",
"Luca",
""
],
[
"Corvino",
"Giovanni",
""
],
[
"De Pietri",
"Roberto",
""
],
[
"Nagar",
"Alessandro",
""
]
] | We compare different gravitational-wave extraction methods used in three-dimensional nonlinear simulations against linear simulations of perturbations of spherical spacetimes with matter. We present results from fully general-relativistic simulations of a system composed by an oscillating and non-rotating star emitting... |
1708.05360 | Joel Franklin | E. Banyas, J. Franklin | The (Weak) Gravitational Field of a Dirac Monopole | to appear, Classical and Quantum Gravity | Classical and Quantum Gravity 34, 195004, 2017 | 10.1088/1361-6382/aa8657 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish the gravitational detectability of a Dirac monopole using a
weak-field limit of general relativity, which can be developed from the
Newtonian gravitational potential by including energy as a source. The
resulting potential matches (by construction) the weak-field limit of two
different solutions to Einst... | [
{
"created": "Thu, 17 Aug 2017 16:49:19 GMT",
"version": "v1"
}
] | 2017-09-22 | [
[
"Banyas",
"E.",
""
],
[
"Franklin",
"J.",
""
]
] | We establish the gravitational detectability of a Dirac monopole using a weak-field limit of general relativity, which can be developed from the Newtonian gravitational potential by including energy as a source. The resulting potential matches (by construction) the weak-field limit of two different solutions to Einstei... |
1508.03331 | Ram Gopal Vishwakarma | Ram Gopal Vishwakarma | A Machian Approach to General Relativity | Int. J. Geom. Methods Mod. Phys. (in press) | null | 10.1142/S0219887815501169 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Mach's principle is surely one of those tantalizingly beautiful concepts in
physics which remain elusive. Though General Relativity (GR) was conceived in
the spirit of realizing it, the theory failed to fulfill this expectation.
Here a study on the implications of imposing Mach's principle on GR with an
insight tha... | [
{
"created": "Wed, 12 Aug 2015 23:11:45 GMT",
"version": "v1"
}
] | 2015-08-19 | [
[
"Vishwakarma",
"Ram Gopal",
""
]
] | Mach's principle is surely one of those tantalizingly beautiful concepts in physics which remain elusive. Though General Relativity (GR) was conceived in the spirit of realizing it, the theory failed to fulfill this expectation. Here a study on the implications of imposing Mach's principle on GR with an insight that sp... |
2103.03083 | Muhammad Sharif | M. Sharif and M. Zeeshan Gul | Noether Symmetry Approach in Energy-Momentum Squared Gravity | 22 pages, 5 figures | Physica Scripta 96(2021)025002 | 10.1088/1402-4896/abcd67 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the newly developed $f(R,\mathbf{T}^2)$ theory
($R$ is the Ricci scalar and $\mathbf{T}^2=T_{\alpha\beta}T^{\alpha\beta},~T
_{\alpha\beta}$ demonstrates the energy-momentum tensor) to explore some viable
cosmological models. For this purpose, we use the Noether symmetry approach in
the c... | [
{
"created": "Wed, 3 Mar 2021 10:05:35 GMT",
"version": "v1"
}
] | 2021-03-10 | [
[
"Sharif",
"M.",
""
],
[
"Gul",
"M. Zeeshan",
""
]
] | In this paper, we investigate the newly developed $f(R,\mathbf{T}^2)$ theory ($R$ is the Ricci scalar and $\mathbf{T}^2=T_{\alpha\beta}T^{\alpha\beta},~T _{\alpha\beta}$ demonstrates the energy-momentum tensor) to explore some viable cosmological models. For this purpose, we use the Noether symmetry approach in the con... |
1006.4435 | Sebastein Clesse | Sebastien Clesse | Initial conditions in hybrid inflation: exploration by MCMC technique | Proceedings of the 45th Rencontres de Moriond conference, March 13 -
20, 2010, La Thuile, Italy | null | null | ulb-th/10-16, CP3-10-23 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In hybrid inflation, initial field values leading to sufficiently long
inflation were thought be fine-tuned in a narrow band along the inflationary
valley. A re-analysis of this problem has shown that there exists a non
negligible proportion of successful initial conditions exterior to the valley,
organized in a comp... | [
{
"created": "Wed, 23 Jun 2010 07:30:04 GMT",
"version": "v1"
}
] | 2010-06-24 | [
[
"Clesse",
"Sebastien",
""
]
] | In hybrid inflation, initial field values leading to sufficiently long inflation were thought be fine-tuned in a narrow band along the inflationary valley. A re-analysis of this problem has shown that there exists a non negligible proportion of successful initial conditions exterior to the valley, organized in a comple... |
1511.00247 | Giulio D'Odorico | Giulio D'Odorico and Frank Saueressig | Quantum Phase Transitions in the BKL Universe | 4 pages, 2 figures | Phys. Rev. D 92, 124068 (2015) | 10.1103/PhysRevD.92.124068 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study quantum corrections to the classical Bianchi I and Bianchi IX
universes. The modified dynamics is well-motivated from the asymptotic safety
program where the short-distance behavior of gravity is governed by a
non-trivial renormalization group fixed point. The correction terms induce a
phase transition in th... | [
{
"created": "Sun, 1 Nov 2015 13:30:50 GMT",
"version": "v1"
}
] | 2016-01-06 | [
[
"D'Odorico",
"Giulio",
""
],
[
"Saueressig",
"Frank",
""
]
] | We study quantum corrections to the classical Bianchi I and Bianchi IX universes. The modified dynamics is well-motivated from the asymptotic safety program where the short-distance behavior of gravity is governed by a non-trivial renormalization group fixed point. The correction terms induce a phase transition in the ... |
gr-qc/9612065 | Jai-chan Hwang | J. Hwang and H. Noh | Density Spectrums from Kinetic Inflations | 8 pages, revtex, no figures | null | null | null | gr-qc | null | The pole-like accelerated expansion stages purely driven by the coupling
between the gravity and the dilaton field without referring to the potential
term can be realized in a class of generalized gravity theories. We consider
three such scenarios based on the scalar-tensor gravity, the induced gravity
and the string... | [
{
"created": "Mon, 30 Dec 1996 02:18:42 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Hwang",
"J.",
""
],
[
"Noh",
"H.",
""
]
] | The pole-like accelerated expansion stages purely driven by the coupling between the gravity and the dilaton field without referring to the potential term can be realized in a class of generalized gravity theories. We consider three such scenarios based on the scalar-tensor gravity, the induced gravity and the string t... |
1809.08792 | Mehdi Rezaei | Mohammad Malekjani, Mehdi Rezaei and Iman A. Akhlaghi | Can Holographic dark energy models fit the observational data? | 12 pages, 4 figures, 6 tables, Accepted in PRD | null | 10.1103/PhysRevD.98.063533 | Phys. Rev. D 98, 063533 | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we investigate the holographic dark energy models with slowly
time-varying model parameter defined based on the current Hubble horizon length
scale. While the previous studies on the three popular holographic dark energy
models defined based on the future event horizon, Ricci scale and
Granda-Oliveros IR... | [
{
"created": "Mon, 24 Sep 2018 08:03:59 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Oct 2018 20:26:52 GMT",
"version": "v2"
}
] | 2019-05-07 | [
[
"Malekjani",
"Mohammad",
""
],
[
"Rezaei",
"Mehdi",
""
],
[
"Akhlaghi",
"Iman A.",
""
]
] | In this work we investigate the holographic dark energy models with slowly time-varying model parameter defined based on the current Hubble horizon length scale. While the previous studies on the three popular holographic dark energy models defined based on the future event horizon, Ricci scale and Granda-Oliveros IR c... |
2103.06411 | Luis L\'opez | L. A. L\'opez and Omar Pedraza | Effects of quintessence on scattering and absorption sections of black
holes | null | null | 10.1007/s12648-022-02373-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Basing on the ideas used by Kiselev, we study three black holes surrounded by
quintessence and the effects of quintessence on the classical and semiclassical
scattering cross-sections. In contrast, the absorption section is studied with
the sinc approximation in the eikonal limit. For Schwarzschild,
Reissner-Nordstr\... | [
{
"created": "Thu, 11 Mar 2021 01:53:32 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Apr 2022 20:53:04 GMT",
"version": "v2"
}
] | 2022-06-08 | [
[
"López",
"L. A.",
""
],
[
"Pedraza",
"Omar",
""
]
] | Basing on the ideas used by Kiselev, we study three black holes surrounded by quintessence and the effects of quintessence on the classical and semiclassical scattering cross-sections. In contrast, the absorption section is studied with the sinc approximation in the eikonal limit. For Schwarzschild, Reissner-Nordstr\"{... |
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