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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2405.10590 | Rui Chen | Jianming Chen and Gerui Chen | Emergence of cosmic space and horizon thermodynamics in the context of
the quantum-deformed entropy | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | According to the quantum deformation approach to quantum gravity, the
thermodynamical entropy of a quantum-deformed (q-deformed) black hole with
horizon area $A$ established by Jalalzadeh is expressed as $S_q = \pi\sin
\left( \frac{A}{8G\mathcal N} \right) /\sin\left(\frac{\pi}{2\mathcal
N}\right)$, where $\mathcal N... | [
{
"created": "Fri, 17 May 2024 07:25:29 GMT",
"version": "v1"
}
] | 2024-05-20 | [
[
"Chen",
"Jianming",
""
],
[
"Chen",
"Gerui",
""
]
] | According to the quantum deformation approach to quantum gravity, the thermodynamical entropy of a quantum-deformed (q-deformed) black hole with horizon area $A$ established by Jalalzadeh is expressed as $S_q = \pi\sin \left( \frac{A}{8G\mathcal N} \right) /\sin\left(\frac{\pi}{2\mathcal N}\right)$, where $\mathcal N=L... |
1811.02533 | Scott Perkins | Scott Perkins and Nicolas Yunes | Probing Screening and the Graviton Mass with Gravitational Waves | 11 pages, 5 figures | Classical & Quantum Gravity, Volume 36, Number 5, 2018 | 10.1088/1361-6382/aafce6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves can probe fundamental physics, leading to new constraints
on the mass of the graviton. Previous tests, however, have neglected the effect
of screening, which is typically present in modified theories that predict a
non-zero graviton mass. We here study whether future gravitational wave
observation... | [
{
"created": "Tue, 6 Nov 2018 18:03:36 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Apr 2019 04:23:32 GMT",
"version": "v2"
}
] | 2019-04-12 | [
[
"Perkins",
"Scott",
""
],
[
"Yunes",
"Nicolas",
""
]
] | Gravitational waves can probe fundamental physics, leading to new constraints on the mass of the graviton. Previous tests, however, have neglected the effect of screening, which is typically present in modified theories that predict a non-zero graviton mass. We here study whether future gravitational wave observations ... |
0803.3995 | Shih-Yuin Lin | Shih-Yuin Lin, Chung-Hsien Chou, B. L. Hu | Disentanglement of two harmonic oscillators in relativistic motion | 16 pages, 8 figures; typos added, minor changes in Secs. I and V | Phys.Rev.D78:125025,2008 | 10.1103/PhysRevD.78.125025 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the dynamics of quantum entanglement between two Unruh-DeWitt
detectors, one stationary (Alice), and another uniformly accelerating (Rob),
with no direct interaction but coupled to a common quantum field in (3+1)D
Minkowski space. We find that for all cases studied the initial entanglement
between the detect... | [
{
"created": "Thu, 27 Mar 2008 18:46:18 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Dec 2008 12:47:56 GMT",
"version": "v2"
}
] | 2009-01-01 | [
[
"Lin",
"Shih-Yuin",
""
],
[
"Chou",
"Chung-Hsien",
""
],
[
"Hu",
"B. L.",
""
]
] | We study the dynamics of quantum entanglement between two Unruh-DeWitt detectors, one stationary (Alice), and another uniformly accelerating (Rob), with no direct interaction but coupled to a common quantum field in (3+1)D Minkowski space. We find that for all cases studied the initial entanglement between the detector... |
1004.0664 | Lee Smolin | Lee Smolin | Classical paradoxes of locality and their possible quantum resolutions
in deformed special relativity | LaTeX, 28 pages, no figures, substantially revised | null | 10.1007/s10714-011-1235-1 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In deformed or doubly special relativity (DSR) the action of the lorentz
group on momentum eigenstates is deformed to preserve a maximal momenta or
minimal length, supposed equal to the Planck length. The classical and quantum
dynamics of a particle propagating in kappa-Minkowski spacetime is discussed in
order to ex... | [
{
"created": "Mon, 5 Apr 2010 17:14:18 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Jul 2010 22:37:48 GMT",
"version": "v2"
}
] | 2015-05-18 | [
[
"Smolin",
"Lee",
""
]
] | In deformed or doubly special relativity (DSR) the action of the lorentz group on momentum eigenstates is deformed to preserve a maximal momenta or minimal length, supposed equal to the Planck length. The classical and quantum dynamics of a particle propagating in kappa-Minkowski spacetime is discussed in order to exam... |
gr-qc/0109060 | V. L. Kalashnikov | V. L. Kalashnikov | X-matter induced cosmological scenarios in the relativistic theory of
gravity | 9 pages, 3 figures, LaTeX2e, commented Maple 6 worksheet is
accessible on http://www.geocities.com/optomaplev | Spacetime and Substance 2 (2001) 75-78 | null | null | gr-qc | null | It was shown, that the presence of the so-called X-matter with an equation of
state, which lies between limits of the strong and weak energy conditions,
allows the variety of the cosmological scenarios in the relativistic theory of
gravity. In spite of the fixed negative sign of the cosmological term in the
field equ... | [
{
"created": "Tue, 18 Sep 2001 18:18:29 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Sep 2001 14:39:48 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kalashnikov",
"V. L.",
""
]
] | It was shown, that the presence of the so-called X-matter with an equation of state, which lies between limits of the strong and weak energy conditions, allows the variety of the cosmological scenarios in the relativistic theory of gravity. In spite of the fixed negative sign of the cosmological term in the field equat... |
1408.5481 | Andrea Geralico | Donato Bini, Andrea Geralico, Daniele Gregoris, Sauro Succi | Friction forces in cosmological models | 8 pages, 2 figures; published version | Eur. Phys. J. C 73, 2334 (2013) | 10.1140/epjc/s10052-013-2334-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the dynamics of test particles undergoing friction forces in a
Friedmann-Robertson-Walker (FRW) spacetime. The interaction with the background
fluid is modeled by introducing a Poynting-Robertson-like friction force in the
equations of motion, leading to measurable (at least in principle) deviations
of... | [
{
"created": "Sat, 23 Aug 2014 10:20:21 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Gregoris",
"Daniele",
""
],
[
"Succi",
"Sauro",
""
]
] | We investigate the dynamics of test particles undergoing friction forces in a Friedmann-Robertson-Walker (FRW) spacetime. The interaction with the background fluid is modeled by introducing a Poynting-Robertson-like friction force in the equations of motion, leading to measurable (at least in principle) deviations of t... |
1412.2914 | Edward Wilson-Ewing | Yi-Fu Cai, Edward Wilson-Ewing | A $\Lambda$CDM bounce scenario | 14 pages, 8 figures, v2: Discussion extended and references added | JCAP03(2015)006 | 10.1088/1475-7516/2015/03/006 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a contracting universe composed of cold dark matter and radiation,
and with a positive cosmological constant. As is well known from standard
cosmological perturbation theory, under the assumption of initial quantum
vacuum fluctuations the Fourier modes of the comoving curvature perturbation
that exit the (so... | [
{
"created": "Tue, 9 Dec 2014 11:10:06 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Jan 2015 15:12:56 GMT",
"version": "v2"
}
] | 2015-06-23 | [
[
"Cai",
"Yi-Fu",
""
],
[
"Wilson-Ewing",
"Edward",
""
]
] | We study a contracting universe composed of cold dark matter and radiation, and with a positive cosmological constant. As is well known from standard cosmological perturbation theory, under the assumption of initial quantum vacuum fluctuations the Fourier modes of the comoving curvature perturbation that exit the (soun... |
gr-qc/0303043 | Roberto Giambo' | Roberto Giambo', Fabio Giannoni, Giulio Magli and Paolo Piccione | Gravitational collapse of barotropic spherical fluids | 17 pages, LaTeX2e | Gen.Rel.Grav. 36 (2004) 1279-1298 | 10.1023/B:GERG.0000022388.11306.e1 | null | gr-qc astro-ph | null | The gravitational collapse of spherical, barotropic perfect fluids is
analyzed here. For the first time, the final state of these systems is studied
without resorting to simplifying assumptions - such as self-similarity - using
a new approach based on non-linear o.d.e. techniques, and formation of naked
singularities... | [
{
"created": "Tue, 11 Mar 2003 16:44:25 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Jul 2003 14:51:00 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Giambo'",
"Roberto",
""
],
[
"Giannoni",
"Fabio",
""
],
[
"Magli",
"Giulio",
""
],
[
"Piccione",
"Paolo",
""
]
] | The gravitational collapse of spherical, barotropic perfect fluids is analyzed here. For the first time, the final state of these systems is studied without resorting to simplifying assumptions - such as self-similarity - using a new approach based on non-linear o.d.e. techniques, and formation of naked singularities i... |
1208.3509 | Julio Cesar Fabris | J. C. Fabris, F. T. Falciano, P. Vargas Moniz, J. Marto, N. Pinto-Neto | Dilaton Quantum Cosmology with a Schrodinger-like equation | 14 pages, 3 figures in eps format. Minors corrections, new figures | null | 10.1007/s13538-012-0105-y | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A quantum cosmological model with radiation and a dilaton scalar field is
analysed. The Wheeler-deWitt equation in the mini-superspace induces a
Schr\"odinger equation, which can be solved. An explicit wavepacket is
constructed for a particular choice of the ordering factor. A consistent
solution is possible only whe... | [
{
"created": "Thu, 16 Aug 2012 22:51:46 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Aug 2012 15:35:17 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Fabris",
"J. C.",
""
],
[
"Falciano",
"F. T.",
""
],
[
"Moniz",
"P. Vargas",
""
],
[
"Marto",
"J.",
""
],
[
"Pinto-Neto",
"N.",
""
]
] | A quantum cosmological model with radiation and a dilaton scalar field is analysed. The Wheeler-deWitt equation in the mini-superspace induces a Schr\"odinger equation, which can be solved. An explicit wavepacket is constructed for a particular choice of the ordering factor. A consistent solution is possible only when ... |
gr-qc/0012016 | Carlos F. Sopuerta | Francesc Fayos and Carlos F. Sopuerta | Integrability conditions for vacuum spacetimes with a Killing vector
field | 2 pages, ws-p9-75x6-50.cls with LaTeX2e. Contribution to the Ninth
Marcel Grossmann Meeting (Rome, 2-8 July, 2000). Parallel session GT1 | null | null | null | gr-qc | null | We present a new approach to the study of vacuum spacetimes with a Killing
symmetry. The central quantity in this approach is the exterior derivative of
the Killing vector field, which is a test electromagnetic field. Considering
the algebraic structure of this quantity we get a new view of the integrability
conditio... | [
{
"created": "Tue, 5 Dec 2000 12:24:46 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Fayos",
"Francesc",
""
],
[
"Sopuerta",
"Carlos F.",
""
]
] | We present a new approach to the study of vacuum spacetimes with a Killing symmetry. The central quantity in this approach is the exterior derivative of the Killing vector field, which is a test electromagnetic field. Considering the algebraic structure of this quantity we get a new view of the integrability conditions... |
2402.18997 | Orlando Luongo | Dario Corona, Roberto Giamb\`o, Orlando Luongo | Motion of test particles in quasi anti-de Sitter regular black holes | 14 pages, 2 figures. Effort prepared for the Special Issue "20th
Anniversary of IJGMMP" | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the characteristics of two novel regular spacetimes that exhibit a
non-zero vacuum energy term, under the form of a (quasi) anti-de Sitter phase.
Specifically, the first metric is spherical, while the second, derived by
applying the generalized Newman-Janis algorithm to the first, is axisymmetric.
We show ... | [
{
"created": "Thu, 29 Feb 2024 09:47:59 GMT",
"version": "v1"
}
] | 2024-03-01 | [
[
"Corona",
"Dario",
""
],
[
"Giambò",
"Roberto",
""
],
[
"Luongo",
"Orlando",
""
]
] | We explore the characteristics of two novel regular spacetimes that exhibit a non-zero vacuum energy term, under the form of a (quasi) anti-de Sitter phase. Specifically, the first metric is spherical, while the second, derived by applying the generalized Newman-Janis algorithm to the first, is axisymmetric. We show th... |
2104.04932 | Luis A. Sanchez | Fabi\'an H. Zuluaga (1) and Luis A. S\'anchez (1) ((1) Escuela de
F\'isica, Universidad Nacional de Colombia, Medell\'in, Colombia) | Black holes in asymptotic safety with higher derivatives: accretion and
stability analysis | 20 pages, 11 figures, accepted for publication in Chinese Physics C | null | 10.1088/1674-1137/abf72d | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the issue of steady spherically symmetric accretion onto a
renormalization group improved Schwarzschild space-time which is solution to an
asymptotically safe theory (AS) containing high-derivative terms. We use a
Hamiltonian dynamical system approach for the analysis of the accretion of four
types of isoth... | [
{
"created": "Sun, 11 Apr 2021 06:32:34 GMT",
"version": "v1"
}
] | 2021-09-01 | [
[
"Zuluaga",
"Fabián H.",
""
],
[
"Sánchez",
"Luis A.",
""
]
] | We review the issue of steady spherically symmetric accretion onto a renormalization group improved Schwarzschild space-time which is solution to an asymptotically safe theory (AS) containing high-derivative terms. We use a Hamiltonian dynamical system approach for the analysis of the accretion of four types of isother... |
1304.2964 | Ernesto Nungesser | Ernesto Nungesser and Woei Chet Lim | The electromagnetic spike solutions | V3: 13 pages and 4 figures. No change in main result. Title and names
of the solutions changed to make their physical interpretation more clear | Class. Quantum Grav. 30 (2013) 235020 | 10.1088/0264-9381/30/23/235020 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of this paper is to use the existing relation between polarized
electromagnetic Gowdy spacetimes and vacuum Gowdy spacetimes to find explicit
solutions for electromagnetic spikes by a procedure which has been developed by
one of the authors for gravitational spikes. We present new inhomogeneous
solutions whic... | [
{
"created": "Wed, 10 Apr 2013 13:57:06 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Aug 2013 13:38:46 GMT",
"version": "v2"
},
{
"created": "Sat, 28 Sep 2013 12:54:30 GMT",
"version": "v3"
}
] | 2015-06-15 | [
[
"Nungesser",
"Ernesto",
""
],
[
"Lim",
"Woei Chet",
""
]
] | The aim of this paper is to use the existing relation between polarized electromagnetic Gowdy spacetimes and vacuum Gowdy spacetimes to find explicit solutions for electromagnetic spikes by a procedure which has been developed by one of the authors for gravitational spikes. We present new inhomogeneous solutions which ... |
1107.5707 | Felipe J. Llanes-Estrada | Antonio Dobado, Felipe J. Llanes-Estrada (U. Complutense Madrid) and
Jose Antonio Oller (U. Murcia) | The existence of a two-solar mass neutron star constrains the
gravitational constant G_N at strong field | 5 pages including 8 figures | null | 10.1103/PhysRevC.85.012801 | null | gr-qc hep-th nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In General Relativity there is a maximum mass allowed for neutron stars that,
if exceeded, entails their collapse into a black hole. Its precise value
depends on details of the nuclear matter equation of state about which we are
much more certain thanks to recent progress in low-energy effective theories.
The disco... | [
{
"created": "Thu, 28 Jul 2011 13:02:59 GMT",
"version": "v1"
}
] | 2013-05-30 | [
[
"Dobado",
"Antonio",
"",
"U. Complutense Madrid"
],
[
"Llanes-Estrada",
"Felipe J.",
"",
"U. Complutense Madrid"
],
[
"Oller",
"Jose Antonio",
"",
"U. Murcia"
]
] | In General Relativity there is a maximum mass allowed for neutron stars that, if exceeded, entails their collapse into a black hole. Its precise value depends on details of the nuclear matter equation of state about which we are much more certain thanks to recent progress in low-energy effective theories. The discovery... |
gr-qc/0506033 | Christian Boehmer | Christian G. Boehmer | On inflation and torsion in cosmology | 5 pages | Acta Phys.Polon. B36 (2005) 2841-2845 | null | Preprint ESI 1661, TUW-05-10 | gr-qc | null | In a recent letter by H. Davoudiasl, R. Kitano, T. Li and H. Murayama ``The
new Minimal Standard Model'' (NMSM) was constructed that incorporates new
physics beyond the Minimal Standard Model (MSM) of particle physics. The
authors follow the principle of minimal particle content and therefore adopt
the viewpoint of p... | [
{
"created": "Mon, 6 Jun 2005 11:33:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Boehmer",
"Christian G.",
""
]
] | In a recent letter by H. Davoudiasl, R. Kitano, T. Li and H. Murayama ``The new Minimal Standard Model'' (NMSM) was constructed that incorporates new physics beyond the Minimal Standard Model (MSM) of particle physics. The authors follow the principle of minimal particle content and therefore adopt the viewpoint of par... |
1409.2927 | Mercedes Martin-Benito | Beatriz Elizaga Navascu\'es, Mercedes Mart\'in-Benito, and Guillermo
A. Mena Marug\'an | Modeling effective FRW cosmologies with perfect fluids from states of
the hybrid quantum Gowdy model | Version accepted for publication in PRD | Phys. Rev. D 91, 024028, 2015 | 10.1103/PhysRevD.91.024028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We employ recently developed approximation methods in the hybrid quantization
of the Gowdy $T^3$ model with linear polarization and a massless scalar field
to obtain physically interesting solutions of this inhomogeneous cosmology.
More specifically, we propose approximate solutions of the quantum Gowdy model
constru... | [
{
"created": "Wed, 10 Sep 2014 00:41:44 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jan 2015 13:04:06 GMT",
"version": "v2"
}
] | 2015-06-22 | [
[
"Navascués",
"Beatriz Elizaga",
""
],
[
"Martín-Benito",
"Mercedes",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
]
] | We employ recently developed approximation methods in the hybrid quantization of the Gowdy $T^3$ model with linear polarization and a massless scalar field to obtain physically interesting solutions of this inhomogeneous cosmology. More specifically, we propose approximate solutions of the quantum Gowdy model construct... |
2407.04052 | Guilherme Brando | Guilherme Brando, Srashti Goyal, Stefano Savastano, Hector
Villarrubia-Rojo and Miguel Zumalac\'arregui | Signatures of dark and baryonic structures on weakly lensed
gravitational waves | 26 pages, 19 figures, 3 tables | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Gravitational lensing offers a powerful tool for exploring the matter
distribution in the Universe. Thanks to their low frequencies and phase
coherence, gravitational waves (GWs) allow for the observation of novel
wave-optics features (WOFs) in lensing, inaccessible to electromagnetic
signals. Combined with the exist... | [
{
"created": "Thu, 4 Jul 2024 16:50:19 GMT",
"version": "v1"
}
] | 2024-07-08 | [
[
"Brando",
"Guilherme",
""
],
[
"Goyal",
"Srashti",
""
],
[
"Savastano",
"Stefano",
""
],
[
"Villarrubia-Rojo",
"Hector",
""
],
[
"Zumalacárregui",
"Miguel",
""
]
] | Gravitational lensing offers a powerful tool for exploring the matter distribution in the Universe. Thanks to their low frequencies and phase coherence, gravitational waves (GWs) allow for the observation of novel wave-optics features (WOFs) in lensing, inaccessible to electromagnetic signals. Combined with the existin... |
2303.10339 | Tiberiu Harko | Zahra Haghani, Tiberiu Harko | Compact stellar structures in Weyl geometric gravity | 20 pages, 15 figures, accepted for publication in PRD | null | 10.1103/PhysRevD.107.064068 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the structure and physical properties of specific classes of
neutron, quark, and Bose-Einstein Condensate stars in the conformally invariant
Weyl geometric gravity theory. The basic theory is derived from the simplest
conformally invariant action, constructed, in Weyl geometry, from the square of
the Weyl... | [
{
"created": "Sat, 18 Mar 2023 05:34:52 GMT",
"version": "v1"
}
] | 2023-04-12 | [
[
"Haghani",
"Zahra",
""
],
[
"Harko",
"Tiberiu",
""
]
] | We consider the structure and physical properties of specific classes of neutron, quark, and Bose-Einstein Condensate stars in the conformally invariant Weyl geometric gravity theory. The basic theory is derived from the simplest conformally invariant action, constructed, in Weyl geometry, from the square of the Weyl s... |
1001.5061 | Eugen Simanek | Eugen Simanek | Gravitational field of twisted Baby Skyrmion strings and loops | 18 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the gravitational field of infinite straight and stationary
twisted Baby Skyrmion cosmic string. Using the approximate solution of Einstein
equations, it is shown that the internal phase rotation (twist) along the
string axis is responsible for a long-range gravitational acceleration
resembling that of ma... | [
{
"created": "Thu, 28 Jan 2010 20:49:55 GMT",
"version": "v1"
}
] | 2010-01-29 | [
[
"Simanek",
"Eugen",
""
]
] | We consider the gravitational field of infinite straight and stationary twisted Baby Skyrmion cosmic string. Using the approximate solution of Einstein equations, it is shown that the internal phase rotation (twist) along the string axis is responsible for a long-range gravitational acceleration resembling that of mass... |
1009.4665 | Manuel Tiglio | Enrique Pazos, David Brizuela, Jose M. Martin-Garcia, Manuel Tiglio | Mode coupling of Schwarzschild perturbations: Ringdown frequencies | null | Phys.Rev.D82:104028,2010 | 10.1103/PhysRevD.82.104028 | null | gr-qc astro-ph.CO astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within linearized perturbation theory, black holes decay to their final
stationary state through the well-known spectrum of quasinormal modes. Here we
numerically study whether nonlinearities change this picture. For that purpose
we study the ringdown frequencies of gauge-invariant second-order gravitational
perturba... | [
{
"created": "Thu, 23 Sep 2010 17:32:32 GMT",
"version": "v1"
}
] | 2010-12-09 | [
[
"Pazos",
"Enrique",
""
],
[
"Brizuela",
"David",
""
],
[
"Martin-Garcia",
"Jose M.",
""
],
[
"Tiglio",
"Manuel",
""
]
] | Within linearized perturbation theory, black holes decay to their final stationary state through the well-known spectrum of quasinormal modes. Here we numerically study whether nonlinearities change this picture. For that purpose we study the ringdown frequencies of gauge-invariant second-order gravitational perturbati... |
1312.3697 | Daisuke Ida | Daisuke Ida and Miyuki Saito | First-Quantized Theory of Expanding Universe from Field Quantization in
Mini-Superspace | 21 pages, 1 figure, published version | null | 10.1007/JHEP08(2014)082 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose an improved variant of the third-quantization scheme, for the
spatially homogeneous and isotropic cosmological models in Einstein gravity
coupled with a neutral massless scalar field. Our strategy is to specify a
semi-Riemannian structure on the mini-superspace and to consider the quantum
Klein-Gordon fiel... | [
{
"created": "Fri, 13 Dec 2013 03:41:20 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Mar 2014 13:14:31 GMT",
"version": "v2"
},
{
"created": "Tue, 12 Aug 2014 15:55:20 GMT",
"version": "v3"
}
] | 2015-06-18 | [
[
"Ida",
"Daisuke",
""
],
[
"Saito",
"Miyuki",
""
]
] | We propose an improved variant of the third-quantization scheme, for the spatially homogeneous and isotropic cosmological models in Einstein gravity coupled with a neutral massless scalar field. Our strategy is to specify a semi-Riemannian structure on the mini-superspace and to consider the quantum Klein-Gordon field ... |
gr-qc/0612149 | Manuel Tiglio | Enrique Pazos, Ernst Nils Dorband, Alessandro Nagar, Carlos
Palenzuela, Erik Schnetter, Manuel Tiglio | How far away is far enough for extracting numerical waveforms, and how
much do they depend on the extraction method? | 19 pages | Class.Quant.Grav.24:S341-S368,2007 | 10.1088/0264-9381/24/12/S22 | null | gr-qc | null | We present a method for extracting gravitational waves from numerical
spacetimes which generalizes and refines one of the standard methods based on
the Regge--Wheeler--Zerilli perturbation formalism. [abridged] We then present
fully nonlinear three-dimensional numerical evolutions of a distorted
Schwarzschild black h... | [
{
"created": "Fri, 22 Dec 2006 20:20:35 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Pazos",
"Enrique",
""
],
[
"Dorband",
"Ernst Nils",
""
],
[
"Nagar",
"Alessandro",
""
],
[
"Palenzuela",
"Carlos",
""
],
[
"Schnetter",
"Erik",
""
],
[
"Tiglio",
"Manuel",
""
]
] | We present a method for extracting gravitational waves from numerical spacetimes which generalizes and refines one of the standard methods based on the Regge--Wheeler--Zerilli perturbation formalism. [abridged] We then present fully nonlinear three-dimensional numerical evolutions of a distorted Schwarzschild black hol... |
gr-qc/0406021 | Pierre Noundjeu | Pierre Noundjeu | On a Regularity Theorem for Solutions of the Spherically Symmetric
Einstein-Vlasov-Maxwell System | 15 pages | null | null | null | gr-qc | null | Using an estimate, we prove that if solution of the spherically symmetric
Einstein-Vlasov-Maxwell system develops a singularity at all time, then the
first one has to appear at the center of symmetry.
| [
{
"created": "Mon, 7 Jun 2004 14:33:46 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Noundjeu",
"Pierre",
""
]
] | Using an estimate, we prove that if solution of the spherically symmetric Einstein-Vlasov-Maxwell system develops a singularity at all time, then the first one has to appear at the center of symmetry. |
gr-qc/0603017 | Philip Tillman Mr. | Philip Tillman, George Sparling | Fedosov Observables on Constant Curvature Manifolds and the Klein-Gordon
Equation | null | null | null | null | gr-qc | null | In this paper we construct the set of quantum mechanical observables in the
Fedosov *-formalism (a coordinate invariant way to do quantum mechanics on any
manifold M) of a single free particle that lives on a constant curvature
manifold with metric signature (p,q). This was done for most but not all
constant curvatur... | [
{
"created": "Tue, 7 Mar 2006 22:03:55 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Feb 2007 19:13:34 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Tillman",
"Philip",
""
],
[
"Sparling",
"George",
""
]
] | In this paper we construct the set of quantum mechanical observables in the Fedosov *-formalism (a coordinate invariant way to do quantum mechanics on any manifold M) of a single free particle that lives on a constant curvature manifold with metric signature (p,q). This was done for most but not all constant curvature ... |
gr-qc/9701012 | Thomas Kloesch | Thomas Kloesch | Solutions of arbitrary topology in 1+1 gravity | 4 pages, LaTex, 5 eps-figures; contribution to the 2nd Conference on
Constrained Dynamics and Quantum Gravity, Santa Margherita Ligure, September
1996 | Nucl.Phys.Proc.Suppl. 57 (1997) 326-329 | 10.1016/S0920-5632(97)00384-8 | TUW-97-01 | gr-qc | null | We present a classification of all global solutions for generalized 2D
dilaton gravity models (with Lorentzian signature). While for some of the
popular choices of potential-like terms in the Lagrangian, describing, e.g.,
string inspired dilaton gravity or spherically reduced gravity, the possible
topologies of the r... | [
{
"created": "Thu, 9 Jan 1997 10:48:26 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Kloesch",
"Thomas",
""
]
] | We present a classification of all global solutions for generalized 2D dilaton gravity models (with Lorentzian signature). While for some of the popular choices of potential-like terms in the Lagrangian, describing, e.g., string inspired dilaton gravity or spherically reduced gravity, the possible topologies of the res... |
2208.01668 | Brian Seymour | Brian C. Seymour, Hang Yu, and Yanbei Chen | Multiband Gravitational Wave Cosmography with Dark Sirens | 13 pages, 6 figures. Minor edits | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Gravitational waves might help resolve the tension between early and late
Universe measurements of the Hubble constant, and this possibility can be
enhanced with a gravitational wave detector in the decihertz band as we will
demonstrate in this study. Such a detector is particularly suitable for the
multiband observa... | [
{
"created": "Tue, 2 Aug 2022 18:00:36 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Feb 2023 00:51:54 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Jun 2023 22:00:55 GMT",
"version": "v3"
}
] | 2023-06-13 | [
[
"Seymour",
"Brian C.",
""
],
[
"Yu",
"Hang",
""
],
[
"Chen",
"Yanbei",
""
]
] | Gravitational waves might help resolve the tension between early and late Universe measurements of the Hubble constant, and this possibility can be enhanced with a gravitational wave detector in the decihertz band as we will demonstrate in this study. Such a detector is particularly suitable for the multiband observati... |
2402.17190 | Kumar Shwetketu Virbhadra | K. S. Virbhadra | Conservation of distortion of gravitationally lensed images | The title has been changed and typos have been corrected | Physical Review D 109, 124004 (2024) | 10.1103/PhysRevD.109.124004 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We recently hypothesized that a distortion parameter exists such that its
signed sum for all images of singular gravitational lensing of a source
vanishes identically [K. S. Virbhadra, Phys. Rev. D {\bf 106}, 064038 (2022)].
We found a distortion parameter (the ratio of the tangential to radial
magnifications) that s... | [
{
"created": "Tue, 27 Feb 2024 04:11:58 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jun 2024 01:48:16 GMT",
"version": "v2"
}
] | 2024-06-05 | [
[
"Virbhadra",
"K. S.",
""
]
] | We recently hypothesized that a distortion parameter exists such that its signed sum for all images of singular gravitational lensing of a source vanishes identically [K. S. Virbhadra, Phys. Rev. D {\bf 106}, 064038 (2022)]. We found a distortion parameter (the ratio of the tangential to radial magnifications) that sat... |
1809.08238 | Ra\'ul Carballo-Rubio | Ra\'ul Carballo-Rubio, Francesco Di Filippo, Stefano Liberati and Matt
Visser | Phenomenological aspects of black holes beyond general relativity | 21 double-column pages + references, 4 figures; V2: 21 double-column
pages + updated references, some minor changes, 4 figures; V3: references
added, matches published version | Phys. Rev. D 98, 124009 (2018) | 10.1103/PhysRevD.98.124009 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While singularities are inevitable in the classical theory of general
relativity, it is commonly believed that they will not be present when quantum
gravity effects are taken into account in a consistent framework. In
particular, the structure of black holes should be modified in frameworks
beyond general relativity ... | [
{
"created": "Fri, 21 Sep 2018 18:00:00 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Oct 2018 15:13:03 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Dec 2018 18:09:13 GMT",
"version": "v3"
}
] | 2018-12-12 | [
[
"Carballo-Rubio",
"Raúl",
""
],
[
"Di Filippo",
"Francesco",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Visser",
"Matt",
""
]
] | While singularities are inevitable in the classical theory of general relativity, it is commonly believed that they will not be present when quantum gravity effects are taken into account in a consistent framework. In particular, the structure of black holes should be modified in frameworks beyond general relativity th... |
2403.11604 | Dinesh Chandra Maurya | Dinesh Chandra Maurya, K. Yesmakhanova, R. Myrzakulov, G. Nugmanova | FLRW Cosmology in Metric-Affine $F(R,Q)$ Gravity | 22 pages, 10 figures | Chinese Phys. C, (2024) | 10.1088/1674-1137/ad6e62 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | We investigate some FLRW cosmological models in the context of Metric-Affine
$F(R,Q)$ gravity, as proposed in [arXiv:1205.52666]. Here, $R$ and $Q$ are the
curvature and nonmetricity scalars using non-special connections, respectively.
We get the modified field equations using a flat
Friedmann-Lema\^{i}tre-Robertson-... | [
{
"created": "Mon, 18 Mar 2024 09:28:45 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Aug 2024 08:27:16 GMT",
"version": "v2"
}
] | 2024-08-16 | [
[
"Maurya",
"Dinesh Chandra",
""
],
[
"Yesmakhanova",
"K.",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Nugmanova",
"G.",
""
]
] | We investigate some FLRW cosmological models in the context of Metric-Affine $F(R,Q)$ gravity, as proposed in [arXiv:1205.52666]. Here, $R$ and $Q$ are the curvature and nonmetricity scalars using non-special connections, respectively. We get the modified field equations using a flat Friedmann-Lema\^{i}tre-Robertson-Wa... |
2112.10863 | Emmanuil Saridakis | Petros Asimakis, Spyros Basilakos, Nick E. Mavromatos, Emmanuel N.
Saridakis | Big Bang Nucleosynthesis constraints on higher-order modified gravities | 16 pages, 3 figures, version to appear in Phys.Rev.D | Phys.Rev.D 105 (2022) 8, 084010 | 10.1103/PhysRevD.105.084010 | KCL-PH-TH/2021-48 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use Big Bang Nucleosynthesis (BBN) data in order to impose constraints on
higher-order modified gravity, and in particular on: (i) $f(G)$ Gauss-Bonnet
gravity, and $f(P)$ cubic gravities, arising respectively through the use of
the quadratic-curvature Gauss-Bonnet $G$ term, and the cubic-curvature
combination, (ii... | [
{
"created": "Mon, 20 Dec 2021 21:17:08 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Dec 2021 15:23:48 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Mar 2022 17:25:53 GMT",
"version": "v3"
}
] | 2022-04-11 | [
[
"Asimakis",
"Petros",
""
],
[
"Basilakos",
"Spyros",
""
],
[
"Mavromatos",
"Nick E.",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | We use Big Bang Nucleosynthesis (BBN) data in order to impose constraints on higher-order modified gravity, and in particular on: (i) $f(G)$ Gauss-Bonnet gravity, and $f(P)$ cubic gravities, arising respectively through the use of the quadratic-curvature Gauss-Bonnet $G$ term, and the cubic-curvature combination, (ii) ... |
1607.04524 | Neven Bili\'c | Neven Bilic, Dragoljub Dimitrijevic, Goran Djordjevic, and Milan
Milosevic | Tachyon inflation in an AdS braneworld with back-reaction | 19 pages, 11 figures, typos corrected, results unchanged, published
in Int. J. Mod. Phys. A | Int. J. Mod. Phys. A 32, 1750039 (2017) | 10.1142/S0217751X17500397 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the inflationary scenario based on the tachyon field coupled with
the radion of the second Randall-Sundrum model (RSII). The tachyon Lagrangian
is derived from the dynamics of a 3-brane moving in the five dimensional bulk.
The AdS$_5$ geometry of the bulk is extended to include the radion. Using the
Hamilt... | [
{
"created": "Fri, 15 Jul 2016 14:30:10 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Oct 2016 16:18:31 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Feb 2017 15:18:03 GMT",
"version": "v3"
}
] | 2017-02-21 | [
[
"Bilic",
"Neven",
""
],
[
"Dimitrijevic",
"Dragoljub",
""
],
[
"Djordjevic",
"Goran",
""
],
[
"Milosevic",
"Milan",
""
]
] | We analyze the inflationary scenario based on the tachyon field coupled with the radion of the second Randall-Sundrum model (RSII). The tachyon Lagrangian is derived from the dynamics of a 3-brane moving in the five dimensional bulk. The AdS$_5$ geometry of the bulk is extended to include the radion. Using the Hamilton... |
1011.4920 | Stephen Green | Stephen R. Green and Robert M. Wald | A new framework for analyzing the effects of small scale inhomogeneities
in cosmology | 56 pages, minor corrections | Phys.Rev.D83:084020,2011 | 10.1103/PhysRevD.83.084020 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a new, mathematically precise framework for treating the effects
of nonlinear phenomena occurring on small scales in general relativity. Our
approach is an adaptation of Burnett's formulation of the "shortwave
approximation", which we generalize to analyze the effects of matter
inhomogeneities as well as g... | [
{
"created": "Mon, 22 Nov 2010 19:56:42 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Apr 2011 03:54:11 GMT",
"version": "v2"
}
] | 2011-04-14 | [
[
"Green",
"Stephen R.",
""
],
[
"Wald",
"Robert M.",
""
]
] | We develop a new, mathematically precise framework for treating the effects of nonlinear phenomena occurring on small scales in general relativity. Our approach is an adaptation of Burnett's formulation of the "shortwave approximation", which we generalize to analyze the effects of matter inhomogeneities as well as gra... |
gr-qc/0607105 | Emmanuel Serie | Antonio Troisi, Emmanuel S\'eri\'e (LPT, LPTMC), Richard Kerner
(LPTMC) | Cosmological model with Born-Infeld type scalar field | 27 pages | ECONF C0602061:13,2006; Int.J.Geom.Meth.Mod.Phys.4:249,2007 | 10.1142/S0219887807001989 | 06-54 | gr-qc hep-th | null | The non-abelian generalization of the Born-Infeld non-linear lagrangian is
extended to the non-commutative geometry of matrices on a manifold. In this
case not only the usual SU(n) gauge fields appear, but also a natural
generalization of the multiplet of scalar Higgs fields, with the double-well
potential as a first... | [
{
"created": "Mon, 24 Jul 2006 11:50:22 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Sep 2006 20:15:59 GMT",
"version": "v2"
}
] | 2016-08-16 | [
[
"Troisi",
"Antonio",
"",
"LPT, LPTMC"
],
[
"Sérié",
"Emmanuel",
"",
"LPT, LPTMC"
],
[
"Kerner",
"Richard",
"",
"LPTMC"
]
] | The non-abelian generalization of the Born-Infeld non-linear lagrangian is extended to the non-commutative geometry of matrices on a manifold. In this case not only the usual SU(n) gauge fields appear, but also a natural generalization of the multiplet of scalar Higgs fields, with the double-well potential as a first a... |
1712.03398 | Hugo Ferreira | Hugo R. C. Ferreira, Carlos A. R. Herdeiro | Superradiant instabilities in the Kerr-mirror and Kerr-AdS black holes
with Robin boundary conditions | 10 pages, 6 figures; v2: discussion of Kerr-mirror case revised and
expanded | Phys. Rev. D 97, 084003 (2018) | 10.1103/PhysRevD.97.084003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been recently observed that a scalar field with Robin boundary
conditions (RBCs) can trigger both a superradiant and a bulk instability for a
BTZ black hole (BH). To understand the generality and scrutinize the origin of
this behavior, we consider here the superradiant instability of a Kerr BH
confined either ... | [
{
"created": "Sat, 9 Dec 2017 15:05:25 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Feb 2018 17:14:45 GMT",
"version": "v2"
}
] | 2018-04-11 | [
[
"Ferreira",
"Hugo R. C.",
""
],
[
"Herdeiro",
"Carlos A. R.",
""
]
] | It has been recently observed that a scalar field with Robin boundary conditions (RBCs) can trigger both a superradiant and a bulk instability for a BTZ black hole (BH). To understand the generality and scrutinize the origin of this behavior, we consider here the superradiant instability of a Kerr BH confined either in... |
1703.10072 | Sharmanthie Fernando | Sharmanthie Fernando | Charged dilaton black hole in 2+1 dimensions as a particle accelerator | Accepted to be published in Modern Physics Letters A | Mod. Phys. Lett. A, Vol. 32, No. 16 (2017) 1750088 | 10.1142/S0217732317500882 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we have studied particle collisions around a charged dilaton
black hole in 2+1 dimensions. This black hole is a solution to the low energy
string action in 2+1 dimensions. Time-like geodesics for charged particles are
studied in detail. The center of mass energy for two charged particles
colliding close... | [
{
"created": "Wed, 29 Mar 2017 14:44:30 GMT",
"version": "v1"
}
] | 2017-05-16 | [
[
"Fernando",
"Sharmanthie",
""
]
] | In this paper we have studied particle collisions around a charged dilaton black hole in 2+1 dimensions. This black hole is a solution to the low energy string action in 2+1 dimensions. Time-like geodesics for charged particles are studied in detail. The center of mass energy for two charged particles colliding closer ... |
1302.6207 | David Garfinkle | David Garfinkle and E.N. Glass | Killing-Yano tensors in spaces admitting a hypersurface orthogonal
Killing vector | null | null | 10.1063/1.4795122 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Methods are presented for finding Killing-Yano tensors, conformal
Killing-Yano tensors, and conformal Killing vectors in spacetimes with a
hypersurface orthogonal Killing vector. These methods are similar to a method
developed by the authors for finding Killing tensors. In all cases one
decomposes both the tensor and... | [
{
"created": "Mon, 25 Feb 2013 19:56:15 GMT",
"version": "v1"
}
] | 2015-06-15 | [
[
"Garfinkle",
"David",
""
],
[
"Glass",
"E. N.",
""
]
] | Methods are presented for finding Killing-Yano tensors, conformal Killing-Yano tensors, and conformal Killing vectors in spacetimes with a hypersurface orthogonal Killing vector. These methods are similar to a method developed by the authors for finding Killing tensors. In all cases one decomposes both the tensor and t... |
2307.10963 | Zinnat Hassan | Moreshwar Tayde, Zinnat Hassan, P.K. Sahoo | Existence of Wormhole Solutions in $f(Q,T)$ Gravity under
Non-commutative Geometries | Physics of Dark Universe published version | Physics of the Dark Universe, 42 (2023) 101288 | 10.1016/j.dark.2023.101288 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we have systematically discussed the existence of the
spherically symmetric wormhole solutions in the framework of $f(Q,\,T)$ gravity
under two interesting non-commutative geometries such as Gaussian and
Lorentzian distributions of the string theory. Also, to find the solutions, we
consider two $f(Q,\,... | [
{
"created": "Thu, 20 Jul 2023 15:42:34 GMT",
"version": "v1"
}
] | 2023-07-25 | [
[
"Tayde",
"Moreshwar",
""
],
[
"Hassan",
"Zinnat",
""
],
[
"Sahoo",
"P. K.",
""
]
] | In this paper, we have systematically discussed the existence of the spherically symmetric wormhole solutions in the framework of $f(Q,\,T)$ gravity under two interesting non-commutative geometries such as Gaussian and Lorentzian distributions of the string theory. Also, to find the solutions, we consider two $f(Q,\,T)... |
2208.02741 | Maurizio Capriolo | Salvatore Capozziello, Maurizio Capriolo and Gaetano Lambiase | Energy-Momentum Complex in Higher Order Curvature-Based Local Gravity | 33 pages, accepted for publication in Particles | null | 10.3390/particles5030026 | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | In General Relativity, there have been many proposals for defining the
gravitational energy density, notably those proposed by Einstein, Tolman,
Landau and Lifshitz, Papapetrou, M{\o}ller, and Weinberg. In this review, we
firstly explored the energy--momentum complex in an $n^{th}$ order
gravitational Lagrangian $L=L... | [
{
"created": "Thu, 4 Aug 2022 16:17:51 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Aug 2022 10:43:40 GMT",
"version": "v2"
}
] | 2022-08-12 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Capriolo",
"Maurizio",
""
],
[
"Lambiase",
"Gaetano",
""
]
] | In General Relativity, there have been many proposals for defining the gravitational energy density, notably those proposed by Einstein, Tolman, Landau and Lifshitz, Papapetrou, M{\o}ller, and Weinberg. In this review, we firstly explored the energy--momentum complex in an $n^{th}$ order gravitational Lagrangian $L=L\l... |
1305.5991 | Daniel Hemberger | Daniel A. Hemberger, Geoffrey Lovelace, Thomas J. Loredo, Lawrence E.
Kidder, Mark A. Scheel, B\'ela Szil\'agyi, Nicholas W. Taylor, Saul A.
Teukolsky | Final spin and radiated energy in numerical simulations of binary black
holes with equal masses and equal, aligned or anti-aligned spins | 13 pages, 10 figures | Phys. Rev. D 88, 064014 (2013) | 10.1103/PhysRevD.88.064014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The behavior of merging black holes (including the emitted gravitational
waves and the properties of the remnant) can currently be computed only by
numerical simulations. This paper introduces ten numerical relativity
simulations of binary black holes with equal masses and equal spins aligned or
anti-aligned with the... | [
{
"created": "Sun, 26 May 2013 06:33:39 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Sep 2013 19:36:30 GMT",
"version": "v2"
}
] | 2013-09-24 | [
[
"Hemberger",
"Daniel A.",
""
],
[
"Lovelace",
"Geoffrey",
""
],
[
"Loredo",
"Thomas J.",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Szilágyi",
"Béla",
""
],
[
"Taylor",
"Nicholas W."... | The behavior of merging black holes (including the emitted gravitational waves and the properties of the remnant) can currently be computed only by numerical simulations. This paper introduces ten numerical relativity simulations of binary black holes with equal masses and equal spins aligned or anti-aligned with the o... |
2209.15547 | Gregory Ashton | Gregory Ashton | Gaussian Processes for Glitch-robust Gravitational-wave Astronomy | 12 pages, published in MNRAS | null | 10.1093/mnras/stad341 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Interferometric gravitational-wave observatories have opened a new era in
astronomy. The rich data produced by an international network enables detailed
analysis of the curved space-time around black holes. With nearly one hundred
signals observed so far and thousands expected in the next decade, their
population pro... | [
{
"created": "Fri, 30 Sep 2022 15:49:01 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Mar 2023 13:00:48 GMT",
"version": "v2"
}
] | 2023-03-07 | [
[
"Ashton",
"Gregory",
""
]
] | Interferometric gravitational-wave observatories have opened a new era in astronomy. The rich data produced by an international network enables detailed analysis of the curved space-time around black holes. With nearly one hundred signals observed so far and thousands expected in the next decade, their population prope... |
gr-qc/0701013 | Ujjal Debnath | Anup Kumar Singha and Ujjal Debnath | Varying Speed of Light, Modified Chaplygin Gas and Accelerating Universe | 5 latex pages, RevTeX style, 2 figures | Int.J.Mod.Phys.D16:117-122,2007 | 10.1142/S0218271807009358 | null | gr-qc | null | In this paper, we have considered a model of modified Chaplygin gas in VSL
theory with variable gravitational constant $G$. We have shown that the
evolution of the universe starts from radiation era to phantom model. The whole
evolution of the universe has been shown diagramatically by using statefinder
parameters.
| [
{
"created": "Mon, 1 Jan 2007 10:35:17 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Singha",
"Anup Kumar",
""
],
[
"Debnath",
"Ujjal",
""
]
] | In this paper, we have considered a model of modified Chaplygin gas in VSL theory with variable gravitational constant $G$. We have shown that the evolution of the universe starts from radiation era to phantom model. The whole evolution of the universe has been shown diagramatically by using statefinder parameters. |
1905.04613 | Paul Chesler | Paul M. Chesler | Singularities in rotating black holes coupled to a massless scalar field | 20 pages, 4 figures. arXiv admin note: substantial text overlap with
arXiv:1902.08323 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We employ a late-time expansion to study the interior of rotating black holes
coupled to a massless scalar field in asymptotically flat spacetime. We find
that decaying fluxes of scalar radiation into the black hole necessitate the
existence of a null singularity at the Cauchy horizon and a central spacelike
singular... | [
{
"created": "Sun, 12 May 2019 00:39:51 GMT",
"version": "v1"
}
] | 2019-05-14 | [
[
"Chesler",
"Paul M.",
""
]
] | We employ a late-time expansion to study the interior of rotating black holes coupled to a massless scalar field in asymptotically flat spacetime. We find that decaying fluxes of scalar radiation into the black hole necessitate the existence of a null singularity at the Cauchy horizon and a central spacelike singularit... |
0811.4548 | Hrvoje Stefancic | Hrvoje Stefancic | The inhomogeneous equation of state and the road towards the solution of
the cosmological constant problem | Contribution to the Brevik anniversary volume of TSPU Vestnik on the
occasion of the 70th birthday of Prof. Iver Brevik (Editor Prof. S.D.
Odintsov) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a cosmological model containing a cosmological constant $\Lambda$
and a component with an inhomogeneous equation of state. We study the form of
the inhomogeneous equation of state for which the model exhibits the relaxation
of the cosmological constant, i.e. it asymptotically tends to the de Sitter
regime ... | [
{
"created": "Thu, 27 Nov 2008 14:15:52 GMT",
"version": "v1"
}
] | 2008-12-01 | [
[
"Stefancic",
"Hrvoje",
""
]
] | We present a cosmological model containing a cosmological constant $\Lambda$ and a component with an inhomogeneous equation of state. We study the form of the inhomogeneous equation of state for which the model exhibits the relaxation of the cosmological constant, i.e. it asymptotically tends to the de Sitter regime ch... |
2302.09371 | Alfredo D. Millano | Alfredo D. Millano (Catolica del Norte U.), Genly Leon (Catolica del
Norte U. and DUT, Durban) and Andronikos Paliathanasis (Catolica del Norte U.
and DUT, Durban) | Phase-space analysis of an Einstein-Gauss-Bonnet scalar field cosmology | 56 pages, 50 compound figures | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a detailed study of the phase-space of the field equations of an
Einstein-Gauss-Bonnet scalar field cosmology for a spatially flat
Friedmann--Lema\^{\i}tre--Robertson--Walker spacetime. For the scalar field
potential, we consider the exponential function. In contrast, for the coupling
function of the scala... | [
{
"created": "Sat, 18 Feb 2023 16:01:24 GMT",
"version": "v1"
}
] | 2023-02-21 | [
[
"Millano",
"Alfredo D.",
"",
"Catolica del Norte U."
],
[
"Leon",
"Genly",
"",
"Catolica del\n Norte U. and DUT, Durban"
],
[
"Paliathanasis",
"Andronikos",
"",
"Catolica del Norte U.\n and DUT, Durban"
]
] | We perform a detailed study of the phase-space of the field equations of an Einstein-Gauss-Bonnet scalar field cosmology for a spatially flat Friedmann--Lema\^{\i}tre--Robertson--Walker spacetime. For the scalar field potential, we consider the exponential function. In contrast, for the coupling function of the scalar ... |
1202.1879 | Tiberiu Harko | Zahra Haghani, Tiberiu Harko, Hamid Reza Sepangi, Shahab Shahidi | Weyl-Cartan-Weitzenb\"{o}ck gravity as a generalization of teleparallel
gravity | 15 pages, 5 figures; title changed, major modifications; accepted for
publication in JCAP | JCAP 10 (2012) 061 | 10.1088/1475-7516/2012/10/061 | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a gravitational model in a Weyl-Cartan space-time, in which the
Weitzenb\"{o}ck condition of the vanishing of the sum of the curvature and
torsion scalar is also imposed. Moreover, a kinetic term for the torsion is
also included in the gravitational action. The field equations of the model are
obtained fr... | [
{
"created": "Thu, 9 Feb 2012 03:22:02 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Oct 2012 08:31:41 GMT",
"version": "v2"
}
] | 2013-08-13 | [
[
"Haghani",
"Zahra",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Sepangi",
"Hamid Reza",
""
],
[
"Shahidi",
"Shahab",
""
]
] | We consider a gravitational model in a Weyl-Cartan space-time, in which the Weitzenb\"{o}ck condition of the vanishing of the sum of the curvature and torsion scalar is also imposed. Moreover, a kinetic term for the torsion is also included in the gravitational action. The field equations of the model are obtained from... |
2405.12296 | Parampreet Singh | Bao-Fei Li, Meysam Motaharfar, Parampreet Singh | Constraining regularization ambiguities in Loop Quantum Cosmology via
CMB | 28 pages, 12 figures | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | In order to investigate the potential observational signals of different
regularization ambiguities in loop quantum cosmological models, we
systematically compute and compare the primordial scalar power spectra and the
resulting angular power spectra in the standard loop quantum cosmology (LQC)
and its Thiemann regul... | [
{
"created": "Mon, 20 May 2024 18:01:29 GMT",
"version": "v1"
}
] | 2024-05-22 | [
[
"Li",
"Bao-Fei",
""
],
[
"Motaharfar",
"Meysam",
""
],
[
"Singh",
"Parampreet",
""
]
] | In order to investigate the potential observational signals of different regularization ambiguities in loop quantum cosmological models, we systematically compute and compare the primordial scalar power spectra and the resulting angular power spectra in the standard loop quantum cosmology (LQC) and its Thiemann regular... |
gr-qc/9910101 | Abhay Ashtekar | Abhay Ashtekar | Interface of General Relativity, Quantum Physics and Statistical
Mechanics: Some Recent Developments | 20 pages, 5 figures. Based on a talk given at the 99 Journees
Relativistes held at Weimar. To appear in Annalen der Physik | Annalen Phys.9:178-198,2000 | 10.1002/(SICI)1521-3889(200005)9:3/5<178::AID-ANDP178>3.0.CO;2-U | CGPG-99/8-4 | gr-qc hep-th physics.flu-dyn | null | The arena normally used in black holes thermodynamics was recently
generalized to incorporate a broad class of physically interesting situations.
The key idea is to replace the notion of stationary event horizons by that of
`isolated horizons.' Unlike event horizons, isolated horizons can be located in
a space-time q... | [
{
"created": "Wed, 27 Oct 1999 19:10:53 GMT",
"version": "v1"
}
] | 2017-09-27 | [
[
"Ashtekar",
"Abhay",
""
]
] | The arena normally used in black holes thermodynamics was recently generalized to incorporate a broad class of physically interesting situations. The key idea is to replace the notion of stationary event horizons by that of `isolated horizons.' Unlike event horizons, isolated horizons can be located in a space-time qua... |
1903.08088 | Louis Perenon | Louis Perenon and Hermano Velten | The effective field theory of dark energy diagnostic of linear Horndeski
theories after GW170817 and GRB170817A | Contribution to the Jose Plinio Baptista school on Cosmology held in
2016 | Universe 5 (2019) no.6, 138 | 10.3390/universe5060138 | C16-09-25.1 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We summarise the effective field theory of dark energy construction to
explore observable predictions of linear Horndeski theories. Based on
\cite{Perenon:2016blf}, we review the diagnostic of these theories on the
correlation of the large-scale structure phenomenological functions: the
effective Newton constant, the... | [
{
"created": "Mon, 18 Mar 2019 14:47:53 GMT",
"version": "v1"
}
] | 2019-06-14 | [
[
"Perenon",
"Louis",
""
],
[
"Velten",
"Hermano",
""
]
] | We summarise the effective field theory of dark energy construction to explore observable predictions of linear Horndeski theories. Based on \cite{Perenon:2016blf}, we review the diagnostic of these theories on the correlation of the large-scale structure phenomenological functions: the effective Newton constant, the l... |
gr-qc/0607061 | Farook Rahaman | F.Rahaman, M.Kalam and S.Chakraborty | Thin shell wormholes in higher dimensiaonal Einstein-Maxwell theory | 10 pages, accepted in Gen.Rel.Grav | Gen.Rel.Grav. 38 (2006) 1687-1695 | 10.1007/s10714-006-0325-y | null | gr-qc | null | We construct thin shell Lorentzian wormholes in higher dimensional
Einstein-Maxwell theory applying the ' Cut and Paste ' technique proposed by
Visser. The linearized stability is analyzed under radial perturbations around
some assumed higher dimensional spherically symmetric static solution of the
Einstein field equ... | [
{
"created": "Mon, 17 Jul 2006 11:00:42 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Rahaman",
"F.",
""
],
[
"Kalam",
"M.",
""
],
[
"Chakraborty",
"S.",
""
]
] | We construct thin shell Lorentzian wormholes in higher dimensional Einstein-Maxwell theory applying the ' Cut and Paste ' technique proposed by Visser. The linearized stability is analyzed under radial perturbations around some assumed higher dimensional spherically symmetric static solution of the Einstein field equat... |
2205.13052 | Abdellah Touati | Abdellah Touati, Slimane Zaim | On Modified First Law of Black hole Thermodynamics in The
Non-Commutative Gauge Theory | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we investigated the thermodynamic properties of Schwarzschild
black hole (SBH) in the non-commutative (NC) gauge theory of gravity. According
to our previous work, we modify the first law of the black hole (BH)
thermodynamics by the physical quantity (NC potential) $\mathcal{A}$ which is
the conjugate ... | [
{
"created": "Wed, 25 May 2022 21:13:14 GMT",
"version": "v1"
}
] | 2023-10-06 | [
[
"Touati",
"Abdellah",
""
],
[
"Zaim",
"Slimane",
""
]
] | In this paper, we investigated the thermodynamic properties of Schwarzschild black hole (SBH) in the non-commutative (NC) gauge theory of gravity. According to our previous work, we modify the first law of the black hole (BH) thermodynamics by the physical quantity (NC potential) $\mathcal{A}$ which is the conjugate to... |
1612.03157 | Pedro Ferreira | Pedro G. Ferreira, Christopher T. Hill, Graham G. Ross | No fifth force in a scale invariant universe | 8 pages, submitted to PRD | Phys. Rev. D 95, 064038 (2017) | 10.1103/PhysRevD.95.064038 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the possibility that the Planck mass is spontaneously generated in
scale invariant scalar-tensor theories of gravity, typically leading to a
"dilaton." The fifth force, arising from the dilaton, is severely constrained
by astrophysical measurements. We explore the possibility that nature is
fundamentally W... | [
{
"created": "Fri, 9 Dec 2016 20:38:46 GMT",
"version": "v1"
}
] | 2017-03-29 | [
[
"Ferreira",
"Pedro G.",
""
],
[
"Hill",
"Christopher T.",
""
],
[
"Ross",
"Graham G.",
""
]
] | We revisit the possibility that the Planck mass is spontaneously generated in scale invariant scalar-tensor theories of gravity, typically leading to a "dilaton." The fifth force, arising from the dilaton, is severely constrained by astrophysical measurements. We explore the possibility that nature is fundamentally Wey... |
0809.2412 | Belinch\'on Jos\'e Antonio | Jos\'e Antonio Belinch\'on | Bianchi I with variable $G$ and $\Lambda$. Self-Similar approach | 15 pages. accepted in IJMPA | Int.J.Mod.Phys.A23:5021-5036,2008 | 10.1142/S0217751X08043127 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study how to attack under the self-similarity hypothesis a
perfect fluid Bianchi I model with variable $G,$and $\Lambda,$ but under the
condition $\operatorname{div}T\neq0.$ We arrive to the conclusion that: $G$ and
$\Lambda$ are decreasing time functions (the sing of $\Lambda$ depends on the
equatio... | [
{
"created": "Sun, 14 Sep 2008 18:21:16 GMT",
"version": "v1"
}
] | 2009-02-11 | [
[
"Belinchón",
"José Antonio",
""
]
] | In this paper we study how to attack under the self-similarity hypothesis a perfect fluid Bianchi I model with variable $G,$and $\Lambda,$ but under the condition $\operatorname{div}T\neq0.$ We arrive to the conclusion that: $G$ and $\Lambda$ are decreasing time functions (the sing of $\Lambda$ depends on the equation ... |
1806.07909 | Vitor Cardoso | Thiago Assumpcao, Vitor Cardoso, Akihiro Ishibashi, Mauricio Richartz,
Miguel Zilhao | Black hole binaries: ergoregions, photon surfaces, wave scattering, and
quasinormal modes | 13 pages, 11 figures. v3: minor edits, to appear in Physical Review D | Phys. Rev. D 98, 064036 (2018) | 10.1103/PhysRevD.98.064036 | null | gr-qc astro-ph.HE hep-th physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Closed photon orbits around isolated black holes are related to important
aspects of black hole physics, such as strong lensing, absorption cross section
of null particles and the way that black holes relax through quasinormal
ringing. When two black holes are present -- such as during the inspiral and
merger events ... | [
{
"created": "Wed, 20 Jun 2018 18:07:40 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Sep 2018 07:43:23 GMT",
"version": "v2"
},
{
"created": "Thu, 13 Sep 2018 23:49:37 GMT",
"version": "v3"
}
] | 2018-09-26 | [
[
"Assumpcao",
"Thiago",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Ishibashi",
"Akihiro",
""
],
[
"Richartz",
"Mauricio",
""
],
[
"Zilhao",
"Miguel",
""
]
] | Closed photon orbits around isolated black holes are related to important aspects of black hole physics, such as strong lensing, absorption cross section of null particles and the way that black holes relax through quasinormal ringing. When two black holes are present -- such as during the inspiral and merger events of... |
0908.3101 | Matteo Carrera | Matteo Carrera and Domenico Giulini | On the generalization of McVittie's model for an inhomogeneity in a
cosmological spacetime | LaTeX (RevTeX), 15 pages, no figure | Phys.Rev.D81:043521,2010 | 10.1103/PhysRevD.81.043521 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | McVittie's spacetime is a spherically symmetric solution to Einstein's
equation with an energy-momentum tensor of a perfect fluid. It describes the
external field of a single quasi-isolated object with vanishing electric charge
and angular momentum in an environment that asymptotically tends to a
Friedmann--Lemaitre-... | [
{
"created": "Fri, 21 Aug 2009 11:25:39 GMT",
"version": "v1"
}
] | 2010-05-12 | [
[
"Carrera",
"Matteo",
""
],
[
"Giulini",
"Domenico",
""
]
] | McVittie's spacetime is a spherically symmetric solution to Einstein's equation with an energy-momentum tensor of a perfect fluid. It describes the external field of a single quasi-isolated object with vanishing electric charge and angular momentum in an environment that asymptotically tends to a Friedmann--Lemaitre--R... |
gr-qc/9910055 | Wlodzimierz Piechocki | Wlodzimierz Piechocki (Soltan Institute for Nuclear Studies, Warsaw,
Poland) | Topology of the Universe | Presented at the Workshop `Connecting Fundamental Physics and
Cosmology', Cambridge, U.K., 23-27 August 1999; 5 pages, LaTeX2e, no figures | null | null | null | gr-qc | null | General relativity is unable to determine the topology of the Universe. We
propose to apply quantum approach. Quantization of dynamics of a test particle
is sensitive to the spacetime topology. Presented results for a particle in de
Sitter spacetimes favor a finite universe.
| [
{
"created": "Fri, 15 Oct 1999 07:43:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Piechocki",
"Wlodzimierz",
"",
"Soltan Institute for Nuclear Studies, Warsaw,\n Poland"
]
] | General relativity is unable to determine the topology of the Universe. We propose to apply quantum approach. Quantization of dynamics of a test particle is sensitive to the spacetime topology. Presented results for a particle in de Sitter spacetimes favor a finite universe. |
1110.0775 | George E. A. Matsas | Raissa F. P. Mendes and George E. A. Matsas | Radiation interference from sources rotating around Schwarzschild black
holes | 7 pages and 7 figures | Phys. Rev. D, vol 84, 124035 (2011) | 10.1103/PhysRevD.84.124035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the influence of the spacetime curvature on the interference
of the radiation emitted by an ensemble of scalar sources in circular motion
around a Schwarzschild black hole. We pay particular attention to the
transition from the radiating to the non-radiating regime as the number of
sources increases.
| [
{
"created": "Tue, 4 Oct 2011 18:05:25 GMT",
"version": "v1"
}
] | 2013-08-09 | [
[
"Mendes",
"Raissa F. P.",
""
],
[
"Matsas",
"George E. A.",
""
]
] | We investigate the influence of the spacetime curvature on the interference of the radiation emitted by an ensemble of scalar sources in circular motion around a Schwarzschild black hole. We pay particular attention to the transition from the radiating to the non-radiating regime as the number of sources increases. |
1605.01341 | Antoine Klein | Atsushi Nishizawa, Emanuele Berti, Antoine Klein, Alberto Sesana | eLISA eccentricity measurements as tracers of binary black hole
formation | 13 pages, 7 figures, 4 tables, Matches version accepted in Physical
Review D | Phys. Rev. D 94, 064020 (2016) | 10.1103/PhysRevD.94.064020 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Up to hundreds of black hole binaries individually resolvable by eLISA will
coalesce in the Advanced LIGO/Virgo band within ten years, allowing for
multi-band gravitational wave observations. Binaries formed via dynamical
interactions in dense star clusters are expected to have eccentricities
$e_0\sim 10^{-3}$-$10^{-... | [
{
"created": "Wed, 4 May 2016 16:47:03 GMT",
"version": "v1"
},
{
"created": "Fri, 27 May 2016 15:48:44 GMT",
"version": "v2"
},
{
"created": "Fri, 19 Aug 2016 13:41:12 GMT",
"version": "v3"
}
] | 2016-09-14 | [
[
"Nishizawa",
"Atsushi",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Klein",
"Antoine",
""
],
[
"Sesana",
"Alberto",
""
]
] | Up to hundreds of black hole binaries individually resolvable by eLISA will coalesce in the Advanced LIGO/Virgo band within ten years, allowing for multi-band gravitational wave observations. Binaries formed via dynamical interactions in dense star clusters are expected to have eccentricities $e_0\sim 10^{-3}$-$10^{-1}... |
0803.2005 | Salvador Robles-Perez | Prado Mart\'in-Moruno, Az-Eddine L. Marrakchi, Salvador Robles-P\'erez
and Pedro F. Gonz\'alez-D\'iaz | Dark Energy Accretion onto black holes in a cosmic scenario | 7 pages, 3 figures | Gen.Rel.Grav.41:2797-2811,2009 | 10.1007/s10714-009-0808-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the accretion of dark energy onto a black hole in the
cases that dark energy is equipped with a positive cosmological constant and
when the space-time is described by a Schwarzschild-de Sitter metric. It is
shown that, if confronted with current observational data, the results derived
when no c... | [
{
"created": "Thu, 13 Mar 2008 16:38:36 GMT",
"version": "v1"
}
] | 2009-12-04 | [
[
"Martín-Moruno",
"Prado",
""
],
[
"Marrakchi",
"Az-Eddine L.",
""
],
[
"Robles-Pérez",
"Salvador",
""
],
[
"González-Díaz",
"Pedro F.",
""
]
] | In this paper we study the accretion of dark energy onto a black hole in the cases that dark energy is equipped with a positive cosmological constant and when the space-time is described by a Schwarzschild-de Sitter metric. It is shown that, if confronted with current observational data, the results derived when no cos... |
2407.16669 | Tathagata Ghosh | Tathagata Ghosh, Bhaskar Biswas, Sukanta Bose, Shasvath J. Kapadia | Joint Inference of Population, Cosmology, and Neutron Star Equation of
State from Gravitational Waves of Dark Binary Neutron Stars | 26 pages, 14 figures, 4 tables | null | null | LIGO-P2400303 | gr-qc astro-ph.CO astro-ph.HE nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves (GWs) from binary neutron stars (BNSs) are expected to be
accompanied by electromagnetic (EM) emissions, which help to identify the host
galaxy. Since GW events directly measure their luminosity distances, joint
GW-EM observations from BNSs help to study cosmology, particularly the Hubble
constant... | [
{
"created": "Tue, 23 Jul 2024 17:37:43 GMT",
"version": "v1"
}
] | 2024-07-24 | [
[
"Ghosh",
"Tathagata",
""
],
[
"Biswas",
"Bhaskar",
""
],
[
"Bose",
"Sukanta",
""
],
[
"Kapadia",
"Shasvath J.",
""
]
] | Gravitational waves (GWs) from binary neutron stars (BNSs) are expected to be accompanied by electromagnetic (EM) emissions, which help to identify the host galaxy. Since GW events directly measure their luminosity distances, joint GW-EM observations from BNSs help to study cosmology, particularly the Hubble constant, ... |
2103.14750 | Hugo Roussille | David Langlois, Karim Noui, Hugo Roussille | Black hole perturbations in modified gravity | v3: version accepted for publication in Physical Review D | null | 10.1103/PhysRevD.104.124044 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | We study the linear perturbations about nonrotating black holes in the
context of degenerate higher-order scalar-tensor (DHOST) theories, using a
systematic approach that extracts the asymptotic behaviour of perturbations (at
spatial infinity and near the horizon) directly from the first-order radial
differential sys... | [
{
"created": "Fri, 26 Mar 2021 21:56:01 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Apr 2021 09:37:09 GMT",
"version": "v2"
},
{
"created": "Tue, 14 Dec 2021 16:22:58 GMT",
"version": "v3"
}
] | 2021-12-15 | [
[
"Langlois",
"David",
""
],
[
"Noui",
"Karim",
""
],
[
"Roussille",
"Hugo",
""
]
] | We study the linear perturbations about nonrotating black holes in the context of degenerate higher-order scalar-tensor (DHOST) theories, using a systematic approach that extracts the asymptotic behaviour of perturbations (at spatial infinity and near the horizon) directly from the first-order radial differential syste... |
1205.3974 | Cenalo Vaz | Kinjalk Lochan and Cenalo Vaz | Statistical analysis of entropy correction from topological defects in
Loop Black Holes | 12 pages, no figures. Version to appear in Phys. Rev. D | Phys. Rev. D 86 (2012) 044035 | 10.1103/PhysRevD.86.044035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we discuss the entropy of quantum black holes in the LQG
formalism when the number of punctures on the horizon is treated as a quantum
hair, that is we compute the black hole entropy in the grand canonical (area)
ensemble. The entropy is a function of both the average area and the average
number of punc... | [
{
"created": "Thu, 17 May 2012 16:24:35 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Jul 2012 12:06:46 GMT",
"version": "v2"
}
] | 2012-08-30 | [
[
"Lochan",
"Kinjalk",
""
],
[
"Vaz",
"Cenalo",
""
]
] | In this paper we discuss the entropy of quantum black holes in the LQG formalism when the number of punctures on the horizon is treated as a quantum hair, that is we compute the black hole entropy in the grand canonical (area) ensemble. The entropy is a function of both the average area and the average number of punctu... |
gr-qc/9606031 | Dharam Ahluwalia | D. V. Ahluwalia (Los Alamos Nat'l Lab.) and C. Burgard (DESY) | About the Interpretation of Gravitationally Induced Neutrino Oscillation
Phases | Requires elsart style files. 5 pages | null | null | LA-UR-96-2031 | gr-qc astro-ph hep-ph quant-ph | null | We present some thoughts on how to interpret the gravitionally induced
neutrino oscillation phases presented by us in our 1996 Gravity Research
Foundation Essay.
| [
{
"created": "Fri, 14 Jun 1996 01:51:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ahluwalia",
"D. V.",
"",
"Los Alamos Nat'l Lab."
],
[
"Burgard",
"C.",
"",
"DESY"
]
] | We present some thoughts on how to interpret the gravitionally induced neutrino oscillation phases presented by us in our 1996 Gravity Research Foundation Essay. |
0903.0109 | Wolfgang Hasse | Wolfgang Hasse, Emrah Birsin, Philipp Haehnel | On force-field models of the spacecraft flyby anomaly | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, Anderson et al. published an empirical prediction formula for the
so far unexplained parts of the velocity changes of spacecrafts during Earth
flybys. In the framework of a perturbational approach, we show that there is no
velocity-independent force field of the Earth - in addition to its Newtonian
gravity ... | [
{
"created": "Sat, 28 Feb 2009 21:16:40 GMT",
"version": "v1"
}
] | 2009-03-03 | [
[
"Hasse",
"Wolfgang",
""
],
[
"Birsin",
"Emrah",
""
],
[
"Haehnel",
"Philipp",
""
]
] | Recently, Anderson et al. published an empirical prediction formula for the so far unexplained parts of the velocity changes of spacecrafts during Earth flybys. In the framework of a perturbational approach, we show that there is no velocity-independent force field of the Earth - in addition to its Newtonian gravity fi... |
gr-qc/0409086 | Sushil Srivastava | S.K.Srivastava | Non-violation of Energy Conditions in the future accelerated universe
due to quantum effects | 11pages. To appear in Int. J. Theo. Phys | null | null | null | gr-qc astro-ph hep-th | null | Here, an accelerated phantom model for the late universe is explored, which
is free from future singularity. It is interseting to see that this model
exhibits strong curvature for all time in future, unlike models with `big-rip
singularity' showing high curvature near singularity time only. So, quantum
gravity effect... | [
{
"created": "Wed, 22 Sep 2004 10:45:21 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Apr 2005 10:16:28 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Apr 2006 12:14:09 GMT",
"version": "v3"
},
{
"created": "Wed, 25 Oct 2006 08:06:36 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Srivastava",
"S. K.",
""
]
] | Here, an accelerated phantom model for the late universe is explored, which is free from future singularity. It is interseting to see that this model exhibits strong curvature for all time in future, unlike models with `big-rip singularity' showing high curvature near singularity time only. So, quantum gravity effects ... |
0806.0428 | J. Ponce de Leon | J. Ponce de Leon and P.S. Wesson | A Class of Anisotropic Five-Dimensional Solutions for the Early Universe | V2 has some minor editorial changes in the introduction | Europhys.Lett.84:20007,2008 | 10.1209/0295-5075/84/20007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We solve the Ricci-flat equations of extended general relativity to obtain an
interesting class of cosmological models. The solutions are analogous to the 4D
ones of Bianchi type-I of Kasner type and have significant implications for
astrophysics.
| [
{
"created": "Tue, 3 Jun 2008 03:46:51 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Oct 2008 04:34:41 GMT",
"version": "v2"
}
] | 2008-12-18 | [
[
"de Leon",
"J. Ponce",
""
],
[
"Wesson",
"P. S.",
""
]
] | We solve the Ricci-flat equations of extended general relativity to obtain an interesting class of cosmological models. The solutions are analogous to the 4D ones of Bianchi type-I of Kasner type and have significant implications for astrophysics. |
1806.01297 | T. P. Singh | Tejinder P. Singh | Space and time as a consequence of GRW quantum jumps | v1: 7 pages; v2: 7 pages, references added; v3: 11 pages,
significantly expanded: remarks (i)-(x) added, including a new explanation
for the quantum non-locality puzzle, and `quantum interference in time' as
possible evidence for operator time, references added; v4: references
updated, to appear in Zeitschrift ... | Zeitschrift f\"ur Naturforschung A73 (2018) 923 | 10.1515/zna-2018-0351 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Ghirardi-Rimini-Weber (GRW) theory of spontaneous collapse offers a
possible resolution of the quantum measurement problem. In this theory, the
wave function of a particle spontaneously and repeatedly localises to one or
the other random position in space, as a consequence of the hypothesised
quantum jumps. In be... | [
{
"created": "Mon, 4 Jun 2018 18:03:05 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Jul 2018 14:46:39 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Aug 2018 02:45:50 GMT",
"version": "v3"
},
{
"created": "Thu, 30 Aug 2018 12:40:21 GMT",
"version": "v4"
}
] | 2018-10-02 | [
[
"Singh",
"Tejinder P.",
""
]
] | The Ghirardi-Rimini-Weber (GRW) theory of spontaneous collapse offers a possible resolution of the quantum measurement problem. In this theory, the wave function of a particle spontaneously and repeatedly localises to one or the other random position in space, as a consequence of the hypothesised quantum jumps. In betw... |
2203.08181 | Mouhssine Koussour | M. Koussour, S.H. Shekh, and M. Bennai | Bianchi type-I Barrow holographic dark energy model in symmetric
teleparallel gravity | IJMPA accepted version | Int. J. Mod. Phys. A, 37.28n29 (2022) 2250184 | 10.1142/S0217751X22501846 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we have discussed a spatially homogeneous and anisotropic
Bianchi type-I space-time in the presence of Barrow holographic dark energy
(infrared cut-off is the Hubble's horizon) proposed by Barrow recently (Physics
Letters B 808 (2020): 135643) and matter in the framework of $f(Q)$ gravity
where the non-... | [
{
"created": "Tue, 15 Mar 2022 18:18:55 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Oct 2022 12:02:12 GMT",
"version": "v2"
}
] | 2023-02-03 | [
[
"Koussour",
"M.",
""
],
[
"Shekh",
"S. H.",
""
],
[
"Bennai",
"M.",
""
]
] | In this work, we have discussed a spatially homogeneous and anisotropic Bianchi type-I space-time in the presence of Barrow holographic dark energy (infrared cut-off is the Hubble's horizon) proposed by Barrow recently (Physics Letters B 808 (2020): 135643) and matter in the framework of $f(Q)$ gravity where the non-me... |
2205.15342 | Naritaka Oshita | Naritaka Oshita, Hayato Motohashi, Sousuke Noda | Evaporation of Echoing Black Holes | 15 pages, 10 figures, published version | Phys.Rev.D 106 (2022) 4, 044044 | 10.1103/PhysRevD.106.044044 | RIKEN-iTHEMS-Report-22 | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We compute the graybody factor and evaporation rate of a rotating black hole
in the presence of a hypothetical reflective surface slightly outside the outer
horizon radius, assuming that it spontaneously emits thermal radiation due to
quantum-gravitational effects such as firewalls or stretched horizons. As a
result ... | [
{
"created": "Mon, 30 May 2022 18:00:03 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Aug 2022 08:31:39 GMT",
"version": "v2"
}
] | 2022-08-31 | [
[
"Oshita",
"Naritaka",
""
],
[
"Motohashi",
"Hayato",
""
],
[
"Noda",
"Sousuke",
""
]
] | We compute the graybody factor and evaporation rate of a rotating black hole in the presence of a hypothetical reflective surface slightly outside the outer horizon radius, assuming that it spontaneously emits thermal radiation due to quantum-gravitational effects such as firewalls or stretched horizons. As a result of... |
1602.06939 | Massimiliano Rinaldi | Adolfo Cisterna, T\'erence Delsate, Ludovic Ducobu, Massimiliano
Rinaldi | Slowly rotating neutron stars in the nonminimal derivative coupling
sector of Horndeski gravity | 29 pages, 6 figures, revtex preprint style. Few typos corrected, one
reference added. Version accepted for publication in Physical Review D | Phys. Rev. D 93, 084046 (2016) | 10.1103/PhysRevD.93.084046 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work is devoted to the construction of slowly rotating neutron stars in
the framework of the nonminimal derivative coupling sector of Horndeski theory.
We match the large radius expansion of spherically symmetric solutions with
cosmological solutions and we find that the most viable model has only one free
param... | [
{
"created": "Mon, 22 Feb 2016 20:56:03 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Mar 2016 18:48:33 GMT",
"version": "v2"
},
{
"created": "Wed, 6 Apr 2016 21:30:46 GMT",
"version": "v3"
}
] | 2016-05-04 | [
[
"Cisterna",
"Adolfo",
""
],
[
"Delsate",
"Térence",
""
],
[
"Ducobu",
"Ludovic",
""
],
[
"Rinaldi",
"Massimiliano",
""
]
] | This work is devoted to the construction of slowly rotating neutron stars in the framework of the nonminimal derivative coupling sector of Horndeski theory. We match the large radius expansion of spherically symmetric solutions with cosmological solutions and we find that the most viable model has only one free paramet... |
gr-qc/0408018 | David Garfinkle | David Garfinkle | The fine structure of Gowdy spacetimes | contribution to A Spacetime Safari: Essays in honor of Vincent
Moncrief | Class.Quant.Grav. 21 (2004) S219 | 10.1088/0264-9381/21/3/012 | null | gr-qc | null | The approach to the singularity in Gowdy spacetimes consists of velocity term
dominated behavior, except at a set of isolated points. At and near these
points, spiky features grow. This paper reviews what is known about these
spikes.
| [
{
"created": "Fri, 6 Aug 2004 19:16:03 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Garfinkle",
"David",
""
]
] | The approach to the singularity in Gowdy spacetimes consists of velocity term dominated behavior, except at a set of isolated points. At and near these points, spiky features grow. This paper reviews what is known about these spikes. |
2304.08333 | Xi-Long Fan | Zhencheng Li, Zhen Jiang, Xi-Long Fan, Yun Chen, Liang Gao, Qi Guo and
Shenghua Yu | Exploring the multiband gravitational wave background with a
semi-analytic galaxy formation model | 12 pages, 5 figures | MNRAS, 527, 3, 2024, 5616-5626 | 10.1093/mnras/stad3576 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An enormous number of compact binary systems, spanning from stellar to
supermassive levels, emit substantial gravitational waves during their final
evolutionary stages, thereby creating a stochastic gravitational wave
background (SGWB). We calculate the merger rates of stellar compact binaries
and massive black hole ... | [
{
"created": "Mon, 17 Apr 2023 14:52:03 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Dec 2023 12:12:47 GMT",
"version": "v2"
}
] | 2023-12-05 | [
[
"Li",
"Zhencheng",
""
],
[
"Jiang",
"Zhen",
""
],
[
"Fan",
"Xi-Long",
""
],
[
"Chen",
"Yun",
""
],
[
"Gao",
"Liang",
""
],
[
"Guo",
"Qi",
""
],
[
"Yu",
"Shenghua",
""
]
] | An enormous number of compact binary systems, spanning from stellar to supermassive levels, emit substantial gravitational waves during their final evolutionary stages, thereby creating a stochastic gravitational wave background (SGWB). We calculate the merger rates of stellar compact binaries and massive black hole bi... |
0808.2574 | Sumit Som | A. Sil and S. Som | A Better Way to Reconstruct Dark Energy Models ? | 17 pages, 5 figures Accepted for publication in `Astrophysics and
Space Science' | Astrophys.Space Sci.318:109-115,2008 | 10.1007/s10509-008-9892-6 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To reconstruct dark energy models the redshift $z_{eq}$, marking the end of
radiation era and the beginning of matter-dominated era, can play a role as
important as $z_{t}$, the redshift at which deceleration parameter experiences
a signature flip. To implement the idea we propose a variable equation of state
for mat... | [
{
"created": "Tue, 19 Aug 2008 11:04:28 GMT",
"version": "v1"
}
] | 2009-11-18 | [
[
"Sil",
"A.",
""
],
[
"Som",
"S.",
""
]
] | To reconstruct dark energy models the redshift $z_{eq}$, marking the end of radiation era and the beginning of matter-dominated era, can play a role as important as $z_{t}$, the redshift at which deceleration parameter experiences a signature flip. To implement the idea we propose a variable equation of state for matte... |
gr-qc/9911005 | Jeanette E. Nelson | J.E.Nelson (1) and R.F.Picken (2) ((1)Universita di
Torino,Italy,(2)Instituto Superior Tecnico,Lisboa,Portugal) | Quantum Holonomies in (2+1)-Dimensional Gravity | 10 pages Latex no figures | Phys.Lett. B471 (2000) 367-372 | 10.1016/S0370-2693(99)01407-0 | DFTT/59/99,IST/DM/30/99 | gr-qc hep-th math.QA | null | We describe an approach to the quantisation of (2+1)-dimensional gravity with
topology R x T^2 and negative cosmological constant, which uses two quantum
holonomy matrices satisfying a q-commutation relation. Solutions of diagonal
and upper-triangular form are constructed, which in the latter case exhibit
additional,... | [
{
"created": "Tue, 2 Nov 1999 17:27:28 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Nov 1999 11:11:41 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Nelson",
"J. E.",
""
],
[
"Picken",
"R. F.",
""
]
] | We describe an approach to the quantisation of (2+1)-dimensional gravity with topology R x T^2 and negative cosmological constant, which uses two quantum holonomy matrices satisfying a q-commutation relation. Solutions of diagonal and upper-triangular form are constructed, which in the latter case exhibit additional, n... |
2003.12279 | Jinn-Ouk Gong | Inyong Cho, Jinn-Ouk Gong and Seung Hun Oh | Second-order effective energy-momentum tensor of gravitational scalar
perturbations with perfect fluid | 21 pages | Phys. Rev. D 102, 043531 (2020) | 10.1103/PhysRevD.102.043531 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the second-order gravitational scalar perturbations for a
barotropic fluid. We derive the effective energy-momentum tensor described by
the quadratic terms of the gravitational and the matter perturbations. We show
that the second-order effective energy-momentum tensor is gauge dependent. We
impose thr... | [
{
"created": "Fri, 27 Mar 2020 08:40:42 GMT",
"version": "v1"
}
] | 2020-09-09 | [
[
"Cho",
"Inyong",
""
],
[
"Gong",
"Jinn-Ouk",
""
],
[
"Oh",
"Seung Hun",
""
]
] | We investigate the second-order gravitational scalar perturbations for a barotropic fluid. We derive the effective energy-momentum tensor described by the quadratic terms of the gravitational and the matter perturbations. We show that the second-order effective energy-momentum tensor is gauge dependent. We impose three... |
gr-qc/9604010 | Carlo Rovelli | Norbert Grot, Carlo Rovelli | Moduli-space structure of knots with intersections | 15 pages, latex-revtex, no figures | J.Math.Phys. 37 (1996) 3014-3021 | 10.1063/1.531527 | null | gr-qc | null | It is well known that knots are countable in ordinary knot theory. Recently,
knots {\it with intersections} have raised a certain interest, and have been
found to have physical applications. We point out that such knots --equivalence
classes of loops in $R^3$ under diffeomorphisms-- are not countable; rather,
they ex... | [
{
"created": "Thu, 4 Apr 1996 03:42:05 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Grot",
"Norbert",
""
],
[
"Rovelli",
"Carlo",
""
]
] | It is well known that knots are countable in ordinary knot theory. Recently, knots {\it with intersections} have raised a certain interest, and have been found to have physical applications. We point out that such knots --equivalence classes of loops in $R^3$ under diffeomorphisms-- are not countable; rather, they exhi... |
gr-qc/0405143 | Edward Glass | E.N. Glass and J.P. Krisch | Kottler-Lambda-Kerr Spacetime | 1 eps figure | null | null | null | gr-qc | null | The static Kottler metric is the Schwarzschild vacuum metric extended to
include a cosmological constant. Angular momentum is added to the Kottler
metric by using Newman and Janis' complexifying algorithm. The new metric is
the Lambda generalization of the Kerr spacetime. It is stationary, axially
symmetric, Petrov t... | [
{
"created": "Fri, 28 May 2004 21:05:16 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Glass",
"E. N.",
""
],
[
"Krisch",
"J. P.",
""
]
] | The static Kottler metric is the Schwarzschild vacuum metric extended to include a cosmological constant. Angular momentum is added to the Kottler metric by using Newman and Janis' complexifying algorithm. The new metric is the Lambda generalization of the Kerr spacetime. It is stationary, axially symmetric, Petrov typ... |
0804.3806 | R. F. O'Connell | R. F. O'Connell | Gravito-Magnetism in one-body and two-body systems: Theory and
Experiments | Invited Lecture, in "Atom Optics and Space Physics", Proc. of Course
CLXVIII of the International School of Physics "Enrico Fermi", Varenna,
Italy, 2007, ed. E. Arimondo, W. Ertmer and W. Schleich, in press; 15 pages | null | null | Proc. of Course CLXVIII of the International School of
Physics(Societa Italiana di Fisica, 2009) | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We survey theoretical and experimental/observational results on
general-relativistic spin (rotation) effects in binary systems. A detailed
discussion is given of the two-body Kepler problem and its first post-Newtonian
generalization, including spin effects. Spin effects result from gravitational
spin-orbit and spin-... | [
{
"created": "Wed, 23 Apr 2008 20:32:52 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Sep 2009 15:41:21 GMT",
"version": "v2"
}
] | 2009-09-21 | [
[
"O'Connell",
"R. F.",
""
]
] | We survey theoretical and experimental/observational results on general-relativistic spin (rotation) effects in binary systems. A detailed discussion is given of the two-body Kepler problem and its first post-Newtonian generalization, including spin effects. Spin effects result from gravitational spin-orbit and spin-sp... |
gr-qc/0602110 | Richard Woodard | Shun-Pei Miao and R. P. Woodard (University of Florida) | Leading Log Solution for Inflationary Yukawa | 35 pages, LaTeX 2epsilon, 4 figures (using axodraw), version 2 has an
updated reference list | Phys.Rev.D74:044019,2006 | 10.1103/PhysRevD.74.044019 | UFIFT-QG-06-03 | gr-qc astro-ph hep-ph | null | We generalize Starobinskii's stochastic technique to the theory of a
massless, minimally coupled scalar interacting with a massless fermion in a
locally de Sitter geometry. The scalar is an ``active'' field that can engender
infrared logarithms. The fermion is a ``passive'' field that cannot cause
infrared logarithms... | [
{
"created": "Mon, 27 Feb 2006 11:46:26 GMT",
"version": "v1"
},
{
"created": "Sun, 11 May 2008 12:42:57 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Miao",
"Shun-Pei",
"",
"University of Florida"
],
[
"Woodard",
"R. P.",
"",
"University of Florida"
]
] | We generalize Starobinskii's stochastic technique to the theory of a massless, minimally coupled scalar interacting with a massless fermion in a locally de Sitter geometry. The scalar is an ``active'' field that can engender infrared logarithms. The fermion is a ``passive'' field that cannot cause infrared logarithms b... |
1412.7832 | Sarbari Guha Dr. | Pinaki Bhattacharya and Sarbari Guha | Confinement and stability of dynamical system in presence of scalar
fields and perturbation in the bulk | 13 pages, 28 figures, minor changes in the text, one reference added | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we have considered a five-dimensional warped product spacetime
with spacelike extra dimension and with a scalar field source in the bulk. We
have studied the dynamics of the scalar field under different types of
potential in an effort to explain the confinement of particles in the
five-dimensional space... | [
{
"created": "Thu, 25 Dec 2014 16:07:00 GMT",
"version": "v1"
},
{
"created": "Sat, 23 May 2015 10:39:45 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Jun 2015 19:05:21 GMT",
"version": "v3"
}
] | 2015-06-02 | [
[
"Bhattacharya",
"Pinaki",
""
],
[
"Guha",
"Sarbari",
""
]
] | In this paper we have considered a five-dimensional warped product spacetime with spacelike extra dimension and with a scalar field source in the bulk. We have studied the dynamics of the scalar field under different types of potential in an effort to explain the confinement of particles in the five-dimensional spaceti... |
gr-qc/9812078 | Jose Pizarro de Sande Lemos | Jose' P. S. Lemos | Collapsing shells of radiation in anti-de Sitter spacetimes and the hoop
and cosmic censorship conjectures | 4 pages, Revtex Journal: to appear in Physical Review D | Phys.Rev. D59 (1999) 044020 | 10.1103/PhysRevD.59.044020 | null | gr-qc | null | Gravitational collapse of radiation in an anti-de Sitter background is
studied. For the spherical case, the collapse proceeds in much the same way as
in the Minkowski background, i.e., massless naked singularities may form for a
highly inhomogeneous collapse, violating the cosmic censorship, but not the
hoop conjectu... | [
{
"created": "Mon, 21 Dec 1998 23:00:35 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Dec 1998 19:40:01 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Lemos",
"Jose' P. S.",
""
]
] | Gravitational collapse of radiation in an anti-de Sitter background is studied. For the spherical case, the collapse proceeds in much the same way as in the Minkowski background, i.e., massless naked singularities may form for a highly inhomogeneous collapse, violating the cosmic censorship, but not the hoop conjecture... |
gr-qc/0605100 | Leonid Grishchuk P | D. Baskaran, L. P. Grishchuk, and A. G. Polnarev | Imprints of Relic Gravitational Waves in Cosmic Microwave Background
Radiation | 61 pages including 15 figures, v.2: additional references and
clarifications, to be published in Phys. Rev. D | Phys.Rev. D74 (2006) 083008 | 10.1103/PhysRevD.74.083008 | null | gr-qc astro-ph hep-th | null | A strong variable gravitational field of the very early Universe inevitably
generates relic gravitational waves by amplifying their zero-point quantum
oscillations. We begin our discussion by contrasting the concepts of relic
gravitational waves and inflationary `tensor modes'. We explain and summarize
the properties... | [
{
"created": "Wed, 17 May 2006 16:19:47 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Sep 2006 10:01:12 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Baskaran",
"D.",
""
],
[
"Grishchuk",
"L. P.",
""
],
[
"Polnarev",
"A. G.",
""
]
] | A strong variable gravitational field of the very early Universe inevitably generates relic gravitational waves by amplifying their zero-point quantum oscillations. We begin our discussion by contrasting the concepts of relic gravitational waves and inflationary `tensor modes'. We explain and summarize the properties o... |
2105.07994 | Maria Shubina | Maria Shubina | Exact solutions in two-dimensional metric $f(R)$-gravity | 10 pages | null | null | null | gr-qc nlin.SI | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider the two-dimensional metric $f(R)$-gravity model for
the metric tensor depending on two variable: time and one spacelike coordinate.
We obtain exact analytical vacuum solutions for different forms of function $
f(R) $ which are solutions of cosmological type. These solutions are expressed
in ... | [
{
"created": "Mon, 17 May 2021 16:19:15 GMT",
"version": "v1"
}
] | 2021-05-18 | [
[
"Shubina",
"Maria",
""
]
] | In this paper we consider the two-dimensional metric $f(R)$-gravity model for the metric tensor depending on two variable: time and one spacelike coordinate. We obtain exact analytical vacuum solutions for different forms of function $ f(R) $ which are solutions of cosmological type. These solutions are expressed in te... |
2405.04933 | Antonia Seifert | Antonia Seifert | The Importance of Being Symmetric: Flat Rotation Curves from Exact
Axisymmetric Static Vacuum Spacetimes | 10 pages, 4 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Starting from the vacuum Einstein Field Equations and a static axisymmetric
ansatz, we find two new solutions describing an axisymmetric static vacuum
spacetime with cylindrical symmetry: One of this exhibits an additional
symmetry in $z$-direction and the other has $z$-coordinate dependent
coefficients. In analogy t... | [
{
"created": "Wed, 8 May 2024 10:00:33 GMT",
"version": "v1"
}
] | 2024-05-09 | [
[
"Seifert",
"Antonia",
""
]
] | Starting from the vacuum Einstein Field Equations and a static axisymmetric ansatz, we find two new solutions describing an axisymmetric static vacuum spacetime with cylindrical symmetry: One of this exhibits an additional symmetry in $z$-direction and the other has $z$-coordinate dependent coefficients. In analogy to ... |
gr-qc/9605008 | Henrique | H. P. de Oliveira | Self-Similar Collapse in Brans-Dicke Theory and Critical Behavior | 7 pages, 4 Postscript figures available upon request | null | null | null | gr-qc | null | We use the technique of conformal transformations to generate self-similar
collapse in Brans-Dicke theory. We analyze the solutions concerning the
critical behavior found recently by Choptuik. The critical exponent associated
to the formation of black hole for near critical evolution is obtained. The
role of the coup... | [
{
"created": "Fri, 3 May 1996 22:47:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Oliveira",
"H. P.",
""
]
] | We use the technique of conformal transformations to generate self-similar collapse in Brans-Dicke theory. We analyze the solutions concerning the critical behavior found recently by Choptuik. The critical exponent associated to the formation of black hole for near critical evolution is obtained. The role of the coupli... |
0901.3349 | Hector Hernandez-Coronado | C. Chryssomalakos, H. Hernandez-Coronado and E. Okon | Center of mass in special and general relativity and its role in an
effective description of spacetime | Prepared for the procceding of the conference DICE 2008 | J.Phys.Conf.Ser.174:012026,2009 | 10.1088/1742-6596/174/1/012026 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this contribution, we suggest the approach that geometric concepts ought
to be defined in terms of physical operations involving quantum matter. In this
way it is expected that some (presumably nocive) idealizations lying deep
within the roots of the notion of spacetime might be excluded. In particular,
we conside... | [
{
"created": "Wed, 21 Jan 2009 20:21:36 GMT",
"version": "v1"
}
] | 2009-07-24 | [
[
"Chryssomalakos",
"C.",
""
],
[
"Hernandez-Coronado",
"H.",
""
],
[
"Okon",
"E.",
""
]
] | In this contribution, we suggest the approach that geometric concepts ought to be defined in terms of physical operations involving quantum matter. In this way it is expected that some (presumably nocive) idealizations lying deep within the roots of the notion of spacetime might be excluded. In particular, we consider ... |
gr-qc/0104073 | Anzhong Wang | Anzhong Wang | Critical Phenomena in Gravitational Collapse: The Studies So Far | 5 figures, revtex. To appear in Braz. J. Phys. (2001) | Braz.J.Phys.31:188-197,2001 | null | null | gr-qc | null | Studies of black hole formation from gravitational collapse have revealed
interesting non-linear phenomena at the threshold of black hole formation. In
particular, in 1993 Choptuik studied the collapse of a massless scalar field
with spherical symmetry and found some behaviour, which is quite similar to the
critical ... | [
{
"created": "Mon, 23 Apr 2001 22:44:23 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Wang",
"Anzhong",
""
]
] | Studies of black hole formation from gravitational collapse have revealed interesting non-linear phenomena at the threshold of black hole formation. In particular, in 1993 Choptuik studied the collapse of a massless scalar field with spherical symmetry and found some behaviour, which is quite similar to the critical ph... |
gr-qc/0102056 | Joshua Wood | Joshua Wood and William Moreau | Solutions of Conformal Gravity with Dynamical Mass Generation in the
Solar System | 8 pages, 3 figures | null | null | null | gr-qc | null | The field equations of Mannheim's theory of conformal gravity with dynamic
mass generation are solved numerically in the interior and exterior regions of
a model spherically symmetric sun with matched boundary conditions at the
surface. The model consists of a generic fermion field inside the sun, and a
scalar Higgs ... | [
{
"created": "Tue, 13 Feb 2001 05:17:29 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wood",
"Joshua",
""
],
[
"Moreau",
"William",
""
]
] | The field equations of Mannheim's theory of conformal gravity with dynamic mass generation are solved numerically in the interior and exterior regions of a model spherically symmetric sun with matched boundary conditions at the surface. The model consists of a generic fermion field inside the sun, and a scalar Higgs fi... |
0808.2165 | Marcello Ortaggio | Marcello Ortaggio, Vojtech Pravda, Alena Pravdova | Higher dimensional Kerr-Schild spacetimes | 33 pages. v2: minor changes, new references | Class.Quant.Grav.26:025008,2009 | 10.1088/0264-9381/26/2/025008 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate general properties of Kerr-Schild (KS) metrics in n>4
spacetime dimensions. First, we show that the Weyl tensor is of type II or more
special if the null KS vector k is geodetic (or, equivalently, if
T_{ab}k^ak^b=0). We subsequently specialize to vacuum KS solutions, which
naturally split into two fami... | [
{
"created": "Fri, 15 Aug 2008 16:20:14 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Jan 2009 11:02:35 GMT",
"version": "v2"
}
] | 2009-01-12 | [
[
"Ortaggio",
"Marcello",
""
],
[
"Pravda",
"Vojtech",
""
],
[
"Pravdova",
"Alena",
""
]
] | We investigate general properties of Kerr-Schild (KS) metrics in n>4 spacetime dimensions. First, we show that the Weyl tensor is of type II or more special if the null KS vector k is geodetic (or, equivalently, if T_{ab}k^ak^b=0). We subsequently specialize to vacuum KS solutions, which naturally split into two famili... |
1506.06799 | Martin Kolo\v{s} | Martin Kolo\v{s}, Zden\v{e}k Stuchl\'ik and Arman Tursunov | Quasi-harmonic oscillatory motion of charged particles around a
Schwarzschild black hole immersed in an uniform magnetic field | accepted for publication in Classical and Quantum Gravity, 16 pages,
13 figures, 3 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to test the role of large-scale magnetic fields in quasiperiodic
oscillation phenomena observed in microquasars, we study oscillatory motion of
charged particles in vicinity of a Schwarzschild black hole immersed into an
external asymptotically uniform magnetic field. We determine the fundamental
frequencies... | [
{
"created": "Mon, 22 Jun 2015 21:51:52 GMT",
"version": "v1"
}
] | 2015-06-24 | [
[
"Kološ",
"Martin",
""
],
[
"Stuchlík",
"Zdeněk",
""
],
[
"Tursunov",
"Arman",
""
]
] | In order to test the role of large-scale magnetic fields in quasiperiodic oscillation phenomena observed in microquasars, we study oscillatory motion of charged particles in vicinity of a Schwarzschild black hole immersed into an external asymptotically uniform magnetic field. We determine the fundamental frequencies o... |
gr-qc/9709074 | Wlodzimierz Piechocki | George Jorjadze and Wlodzimierz Piechocki | Dynamical Ambiguities in Singular Gravitational Field | 7 pages, latex, no figures, submitted for publication | Class.Quant.Grav.15:L41-L45,1998 | 10.1088/0264-9381/15/5/002 | null | gr-qc | null | We consider particle dynamics in singular gravitational field. In 2d
spacetime the system splits into two independent gravitational systems without
singularity. Dynamical integrals of each system define $sl(2,R)$ algebra, but
the corresponding symmetry transformations are not defined globally.
Quantization leads to a... | [
{
"created": "Sat, 27 Sep 1997 14:40:48 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Jorjadze",
"George",
""
],
[
"Piechocki",
"Wlodzimierz",
""
]
] | We consider particle dynamics in singular gravitational field. In 2d spacetime the system splits into two independent gravitational systems without singularity. Dynamical integrals of each system define $sl(2,R)$ algebra, but the corresponding symmetry transformations are not defined globally. Quantization leads to amb... |
0704.2861 | Vasileios Paschalidis | Vasileios Paschalidis | Mixed Hyperbolic - Second-Order Parabolic Formulations of General
Relativity | 19 pages, two column, references added, two proofs of well-posedness
added, content changed to agree with submitted version to PRD | Phys.Rev.D78:024002,2008 | 10.1103/PhysRevD.78.024002 | null | gr-qc | null | Two new formulations of general relativity are introduced. The first one is a
parabolization of the Arnowitt, Deser, Misner (ADM) formulation and is derived
by addition of combinations of the constraints and their derivatives to the
right-hand-side of the ADM evolution equations. The desirable property of this
modifi... | [
{
"created": "Sun, 22 Apr 2007 20:06:57 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Mar 2008 02:29:30 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Paschalidis",
"Vasileios",
""
]
] | Two new formulations of general relativity are introduced. The first one is a parabolization of the Arnowitt, Deser, Misner (ADM) formulation and is derived by addition of combinations of the constraints and their derivatives to the right-hand-side of the ADM evolution equations. The desirable property of this modifica... |
1708.00830 | Gaurav Narain | Gaurav Narain | On the Renormalization Group perspective of $\alpha$-attractors | 1+17 pages, 2 figures. Typos corrected, new references added,
additional paragraph added in conclusion. Accepted for publication in JCAP | null | 10.1088/1475-7516/2017/10/032 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this short paper we outline a recipe for the reconstruction of $F(R)$
gravity starting from single field inflationary potentials in the Einstein
frame. For simple potentials one can compute the explicit form of $F(R)$,
whilst for more involved examples one gets a parametric form of $F(R)$. The
$F(R)$ reconstructio... | [
{
"created": "Wed, 2 Aug 2017 17:08:07 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Oct 2017 06:27:08 GMT",
"version": "v2"
}
] | 2017-11-01 | [
[
"Narain",
"Gaurav",
""
]
] | In this short paper we outline a recipe for the reconstruction of $F(R)$ gravity starting from single field inflationary potentials in the Einstein frame. For simple potentials one can compute the explicit form of $F(R)$, whilst for more involved examples one gets a parametric form of $F(R)$. The $F(R)$ reconstruction ... |
2212.07293 | Pedro Fernandes | Pedro G. S. Fernandes and David J. Mulryne | A new approach and code for spinning black holes in modified gravity | 40 pages, 14 figures. GitHub repository:
https://github.com/pgsfernandes/SpinningBlackHoles.jl ; v2: added references,
accepted for publication in Classical and Quantum Gravity | Class. Quantum Grav. (2023) 40 165001 | 10.1088/1361-6382/ace232 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss and implement a spectral method approach to computing stationary
and axisymmetric black hole solutions and their properties in modified theories
of gravity. The resulting code is written in the Julia language and is
transparent and easily adapted to new settings. We test the code on both
general relativity... | [
{
"created": "Wed, 14 Dec 2022 15:54:31 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jul 2023 11:20:54 GMT",
"version": "v2"
}
] | 2023-07-12 | [
[
"Fernandes",
"Pedro G. S.",
""
],
[
"Mulryne",
"David J.",
""
]
] | We discuss and implement a spectral method approach to computing stationary and axisymmetric black hole solutions and their properties in modified theories of gravity. The resulting code is written in the Julia language and is transparent and easily adapted to new settings. We test the code on both general relativity a... |
2212.12518 | Filipe Mena | Jo\~ao L. Costa, Rodrigo Duarte and Filipe C. Mena | Improved decay estimates and $C^2$-asymptotic stability of solutions to
the Einstein-scalar field system in spherical symmetry | 42 pages | null | null | null | gr-qc math-ph math.AP math.MP | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We investigate the asymptotic stability of solutions to the characteristic
initial value problem for the Einstein (massless) scalar field system with a
positive cosmological constant. We prescribe spherically symmetric initial data
on a future null cone with a wider range of decaying profiles than previously
consider... | [
{
"created": "Fri, 23 Dec 2022 18:27:54 GMT",
"version": "v1"
}
] | 2022-12-26 | [
[
"Costa",
"João L.",
""
],
[
"Duarte",
"Rodrigo",
""
],
[
"Mena",
"Filipe C.",
""
]
] | We investigate the asymptotic stability of solutions to the characteristic initial value problem for the Einstein (massless) scalar field system with a positive cosmological constant. We prescribe spherically symmetric initial data on a future null cone with a wider range of decaying profiles than previously considered... |
gr-qc/0011050 | Domenico Giulini | Domenico Giulini (University of Zuerich, Switzerland) | Uniqueness of Simultaneity | LeTeX-2e, 18 pages, no figures | The British Journal for the Philosophy of Science, year 2001,
volume 52, number 4 , pages 651-670 | null | ZU-TH 25/00 | gr-qc math-ph math.MP physics.space-ph | null | We consider the problem of uniqueness of certain simultaneity structures in
flat spacetime. Absolute simultaneity is specified to be a non-trivial
equivalence relation which is invariant under the automorphism group Aut of
spacetime. Aut is taken to be the identity-component of either the
inhomogeneous Galilei group ... | [
{
"created": "Tue, 14 Nov 2000 16:58:46 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Giulini",
"Domenico",
"",
"University of Zuerich, Switzerland"
]
] | We consider the problem of uniqueness of certain simultaneity structures in flat spacetime. Absolute simultaneity is specified to be a non-trivial equivalence relation which is invariant under the automorphism group Aut of spacetime. Aut is taken to be the identity-component of either the inhomogeneous Galilei group or... |
gr-qc/0410044 | Slava G. Turyshev | Slava G. Turyshev, Michael Shao, Kenneth L. Nordtvedt | Experimental Design for the LATOR Mission | 16 pages, 17 figures, invited talk given at ``The 2004 NASA/JPL
Workshop on Physics for Planetary Exploration.'' April 20-22, 2004, Solvang,
CA | Int.J.Mod.Phys. D13 (2004) 2035-2064 | 10.1142/S0218271804006528 | null | gr-qc astro-ph physics.space-ph | null | This paper discusses experimental design for the Laser Astrometric Test Of
Relativity (LATOR) mission. LATOR is designed to reach unprecedented accuracy
of 1 part in 10^8 in measuring the curvature of the solar gravitational field
as given by the value of the key Eddington post-Newtonian parameter \gamma.
This missio... | [
{
"created": "Fri, 8 Oct 2004 19:37:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Shao",
"Michael",
""
],
[
"Nordtvedt",
"Kenneth L.",
""
]
] | This paper discusses experimental design for the Laser Astrometric Test Of Relativity (LATOR) mission. LATOR is designed to reach unprecedented accuracy of 1 part in 10^8 in measuring the curvature of the solar gravitational field as given by the value of the key Eddington post-Newtonian parameter \gamma. This mission ... |
0908.3367 | Nurettin Pirinccioglu | Nurettin Pirinccioglu | Gravitational Higgs Mechanism: The Role of Determinantal Invariants | 7 pages, no figure | null | 10.1007/s10714-012-1414-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Higgs mechanism for gravity, as proposed by 't Hooft in arXiv:0708.3184
[hep-th], can be augmented by including determinantal invariants. We analyze
the effects of determinantal invariants in such a set up. We find that the part
of the potential that depends on the determinantal invariants, if obtains a
specific ... | [
{
"created": "Mon, 24 Aug 2009 06:28:08 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Jan 2010 13:49:08 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Dec 2010 08:36:24 GMT",
"version": "v3"
}
] | 2015-05-14 | [
[
"Pirinccioglu",
"Nurettin",
""
]
] | The Higgs mechanism for gravity, as proposed by 't Hooft in arXiv:0708.3184 [hep-th], can be augmented by including determinantal invariants. We analyze the effects of determinantal invariants in such a set up. We find that the part of the potential that depends on the determinantal invariants, if obtains a specific ex... |
gr-qc/9903107 | Lee Samuel Finn | Lee Samuel Finn | Gravitational radiation sources and signatures | 85 pages, 13 figures. Uses ssi.sty macros (included). Written version
of lectures given at XXVI SLAC Summer Institute on Particle Physics
``Gravity: From the Hubble Length to the Planck Length'', August 3-14, 1998 | ECONFC9808031:07,1998 | null | null | gr-qc astro-ph | null | The goal of these lecture notes is to introduce the developing research area
of gravitational-wave phenomenology. In more concrete terms, they are meant to
provide an overview of gravitational-wave sources and an introduction to the
interpretation of real gravitational wave detector data. They are, of course,
limited... | [
{
"created": "Tue, 30 Mar 1999 20:59:25 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Finn",
"Lee Samuel",
""
]
] | The goal of these lecture notes is to introduce the developing research area of gravitational-wave phenomenology. In more concrete terms, they are meant to provide an overview of gravitational-wave sources and an introduction to the interpretation of real gravitational wave detector data. They are, of course, limited i... |
1212.2929 | Rodrigo Maier | Rodrigo Maier and Felipe Tovar Falciano | Brane world in Non-Riemannian Geometry | Physical Review D (2011) | Phys. Rev. D 83, 064019 (2011) | 10.1103/PhysRevD.83.064019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We carefully investigate the modified Einstein's field equation in a four
dimensional (3-brane) arbitrary manifold embedded in a five dimensional
Non-Riemannian bulk spacetime with a noncompact extra dimension. In this
context the Israel-Darmois matching conditions are extended assuming that the
torsion in the bulk i... | [
{
"created": "Wed, 12 Dec 2012 18:54:05 GMT",
"version": "v1"
}
] | 2013-01-23 | [
[
"Maier",
"Rodrigo",
""
],
[
"Falciano",
"Felipe Tovar",
""
]
] | We carefully investigate the modified Einstein's field equation in a four dimensional (3-brane) arbitrary manifold embedded in a five dimensional Non-Riemannian bulk spacetime with a noncompact extra dimension. In this context the Israel-Darmois matching conditions are extended assuming that the torsion in the bulk is ... |
gr-qc/0110039 | Wu Shuangqin | S. Q. Wu and X. Cai | Addendum: Hawking Radiation of Photons in a Variable-mass Kerr Black
Hole | 8 pages, no figures, Latex(use kluwer.cls), to appear in Gen. Rel.
Grav. 34 (2002) No. 4 | Gen.Rel.Grav. 34 (2002) 557-564 | 10.1023/A:1015548909824 | null | gr-qc | null | Hawking evaporation of photons in a variable-mass Kerr space-time is
investigated by using a method of the generalized tortoise coordinate
transformation. The blackbody radiant spectrum of photons displays a new
spin-rotation coupling effect obviously dependent on different helicity states
of photons.
| [
{
"created": "Mon, 8 Oct 2001 13:52:46 GMT",
"version": "v1"
}
] | 2021-10-20 | [
[
"Wu",
"S. Q.",
""
],
[
"Cai",
"X.",
""
]
] | Hawking evaporation of photons in a variable-mass Kerr space-time is investigated by using a method of the generalized tortoise coordinate transformation. The blackbody radiant spectrum of photons displays a new spin-rotation coupling effect obviously dependent on different helicity states of photons. |
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