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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0811.1008 | Savely G. Karshenboim | Savely G. Karshenboim (Max-Planck-Institut fuer Quantenoptik, Garching
and D.I. Mendeleev Institute for Metrology, St.Petersburg) | A constraint on antigravity of antimatter from precision spectroscopy of
simple atoms | null | null | 10.1134/S1063773709100028 | null | gr-qc physics.atom-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Consideration of antigravity for antiparticles is an attractive target for
various experimental projects. There are a number of theoretical arguments
against it but it is not quite clear what kind of experimental data and
theoretical suggestions are involved. In this paper we present straightforward
arguments against... | [
{
"created": "Thu, 6 Nov 2008 18:13:57 GMT",
"version": "v1"
}
] | 2014-11-04 | [
[
"Karshenboim",
"Savely G.",
"",
"Max-Planck-Institut fuer Quantenoptik, Garching\n and D.I. Mendeleev Institute for Metrology, St.Petersburg"
]
] | Consideration of antigravity for antiparticles is an attractive target for various experimental projects. There are a number of theoretical arguments against it but it is not quite clear what kind of experimental data and theoretical suggestions are involved. In this paper we present straightforward arguments against a... |
1811.04743 | Sylvestre Lacour | S Lacour, F H Vincent, M Nowak, A Le Tiec, V Lapeyrere, L David, P
Bourget, A Kellerer, K Jani, J Martino, J-Y Vinet, O Godet O Straub and J
Woillez | SAGE: finding IMBH in the black hole desert | Accepted in Class. Quantum Grav | null | 10.1088/1361-6382/ab3583 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | SAGE (SagnAc interferometer for Gravitational wavE) is a project for a space
observatory based on multiple 12-U CubeSats in geosynchronous orbit. The
objective is a fast track mission which would fill the observational gap
between LISA and ground based observatories. With albeit a lower sensitivity,
it would allow ea... | [
{
"created": "Mon, 12 Nov 2018 14:36:38 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Aug 2019 09:45:47 GMT",
"version": "v2"
}
] | 2020-01-08 | [
[
"Lacour",
"S",
""
],
[
"Vincent",
"F H",
""
],
[
"Nowak",
"M",
""
],
[
"Tiec",
"A Le",
""
],
[
"Lapeyrere",
"V",
""
],
[
"David",
"L",
""
],
[
"Bourget",
"P",
""
],
[
"Kellerer",
"A",
""
]... | SAGE (SagnAc interferometer for Gravitational wavE) is a project for a space observatory based on multiple 12-U CubeSats in geosynchronous orbit. The objective is a fast track mission which would fill the observational gap between LISA and ground based observatories. With albeit a lower sensitivity, it would allow earl... |
1808.00952 | Simone Speziale | Simone Speziale | Raychaudhuri and optical equations for null geodesic congruences with
torsion | v2: improved text, a few equations and a subsection added. v3: typo
in one equation corrected, improved conclusions and other minor amendments | Phys. Rev. D 98, 084029 (2018) | 10.1103/PhysRevD.98.084029 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study null geodesic congruences (NGCs) in the presence of spacetime
torsion, recovering and extending results in the literature. Only the highest
spin irreducible component of torsion gives a proper acceleration with respect
to metric NGCs, but at the same time obstructs abreastness of the geodesics.
This means th... | [
{
"created": "Thu, 2 Aug 2018 17:56:57 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Sep 2018 17:19:13 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Oct 2018 16:56:05 GMT",
"version": "v3"
}
] | 2018-10-24 | [
[
"Speziale",
"Simone",
""
]
] | We study null geodesic congruences (NGCs) in the presence of spacetime torsion, recovering and extending results in the literature. Only the highest spin irreducible component of torsion gives a proper acceleration with respect to metric NGCs, but at the same time obstructs abreastness of the geodesics. This means that... |
0708.3999 | Ernst Nils Dorband | Luciano Rezzolla, Ernst Nils Dorband, Christian Reisswig, Peter
Diener, Denis Pollney, Erik Schnetter and Bela Szilagyi | Spin Diagrams for Equal-Mass Black-Hole Binaries with Aligned Spins | 4 pages, 3 figs; small changes matching published version | Astrophys.J. 679:1422-1426,2008 | 10.1086/587679 | null | gr-qc astro-ph | null | Binary black-hole systems with spins aligned with the orbital angular
momentum are of special interest as they may be the preferred end-state of the
inspiral of generic supermassive binary black-hole systems. In view of this, we
have computed the inspiral and merger of a large set of binary systems of
equal-mass blac... | [
{
"created": "Wed, 29 Aug 2007 17:33:55 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Feb 2008 17:53:07 GMT",
"version": "v2"
}
] | 2011-02-18 | [
[
"Rezzolla",
"Luciano",
""
],
[
"Dorband",
"Ernst Nils",
""
],
[
"Reisswig",
"Christian",
""
],
[
"Diener",
"Peter",
""
],
[
"Pollney",
"Denis",
""
],
[
"Schnetter",
"Erik",
""
],
[
"Szilagyi",
"Bela",
""
... | Binary black-hole systems with spins aligned with the orbital angular momentum are of special interest as they may be the preferred end-state of the inspiral of generic supermassive binary black-hole systems. In view of this, we have computed the inspiral and merger of a large set of binary systems of equal-mass black ... |
1712.02978 | Nikolaos Kalogeropoulos | Nikolaos Kalogeropoulos | Embolic aspects of black hole entropy | 11 pages. No figures. LaTeX2e. Final form, to be published in the
Int. J. Geom. Methods Mod. Physics | Int. J. Geom. Methods Mod. Phys. 15, 1850175 (2018) | 10.1142/S021988781850175X | null | gr-qc cond-mat.stat-mech hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We attempt to provide a mesoscopic treatment of the origin of black hole
entropy in (3+1)-dimensional spacetimes. We treat the case of horizons having
space-like sections $\Sigma$ which are topological spheres, following Hawking's
and the Topological Censorship theorems. We use the injectivity radius of the
induced m... | [
{
"created": "Fri, 8 Dec 2017 08:33:26 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jun 2018 12:24:43 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Jul 2018 08:07:35 GMT",
"version": "v3"
}
] | 2018-11-14 | [
[
"Kalogeropoulos",
"Nikolaos",
""
]
] | We attempt to provide a mesoscopic treatment of the origin of black hole entropy in (3+1)-dimensional spacetimes. We treat the case of horizons having space-like sections $\Sigma$ which are topological spheres, following Hawking's and the Topological Censorship theorems. We use the injectivity radius of the induced met... |
gr-qc/0702121 | Branislav Cvetkovi\'c | B. Cvetkovic and M. Blagojevic | Supersymmetric 3D gravity with torsion: asymptotic symmetries | LATEX, 21 pages, v2: minor corrections, improvements in the
presentation; v3: slightly improved form of the asymptotic supersymmetry
algebra | Class.Quant.Grav.24:3933-3950,2007 | 10.1088/0264-9381/24/15/011 | null | gr-qc hep-th | null | We study the structure of asymptotic symmetries in N=1+1 supersymmetric
extension of three-dimensional gravity with torsion. Using a natural
generalization of the bosonic anti-de Sitter asymptotic conditions, we show
that the asymptotic Poisson bracket algebra of the canonical generators has the
form of two independe... | [
{
"created": "Fri, 23 Feb 2007 11:22:34 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Mar 2007 09:53:10 GMT",
"version": "v2"
},
{
"created": "Fri, 6 Jul 2007 08:19:01 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Cvetkovic",
"B.",
""
],
[
"Blagojevic",
"M.",
""
]
] | We study the structure of asymptotic symmetries in N=1+1 supersymmetric extension of three-dimensional gravity with torsion. Using a natural generalization of the bosonic anti-de Sitter asymptotic conditions, we show that the asymptotic Poisson bracket algebra of the canonical generators has the form of two independent... |
0901.1561 | Marcello Ortaggio | Marcello Ortaggio, Vojtech Pravda, Alena Pravdova | On Kerr-Schild spacetimes in higher dimensions | 5 pages. Proceedings of the Spanish Relativity Meeting 2008,
Salamanca, September 15-19, 2008 (http://www.usal.es/ere2008/) | AIP Conf.Proc.1122:364-367,2009 | 10.1063/1.3141327 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We summarize main properties of vacuum Kerr-Schild spacetimes in higher
dimensions.
| [
{
"created": "Mon, 12 Jan 2009 13:16:09 GMT",
"version": "v1"
}
] | 2009-12-04 | [
[
"Ortaggio",
"Marcello",
""
],
[
"Pravda",
"Vojtech",
""
],
[
"Pravdova",
"Alena",
""
]
] | We summarize main properties of vacuum Kerr-Schild spacetimes in higher dimensions. |
gr-qc/9901077 | Grigori Volovik | G.E. Volovik | Simulation of Panleve-Gullstrand black hole in thin 3He-A film | 8 pages, 4 figures, extended version submitted to JETP Lett | Pisma Zh.Eksp.Teor.Fiz. 69 (1999) 662-668; JETP Lett. 69 (1999)
705-713 | 10.1134/1.568079 | null | gr-qc cond-mat hep-ph | null | The quasi-stationary superfluid state is constructed, which exhibits the
event horizon and Hawking radiation.
| [
{
"created": "Wed, 27 Jan 1999 09:40:16 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Mar 1999 11:10:33 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Volovik",
"G. E.",
""
]
] | The quasi-stationary superfluid state is constructed, which exhibits the event horizon and Hawking radiation. |
0706.0375 | Sumati Surya | Graham Brightwell, Joe Henson, Sumati Surya | A 2D model of Causal Set Quantum Gravity: The emergence of the continuum | Corrections and clarifications. Conclusions unchanged | Class.Quant.Grav.25:105025,2008 | 10.1088/0264-9381/25/10/105025 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Non-perturbative theories of quantum gravity inevitably include
configurations that fail to resemble physically reasonable spacetimes at large
scales. Often, these configurations are entropically dominant and pose an
obstacle to obtaining the desired classical limit. We examine this "entropy
problem" in a model of ca... | [
{
"created": "Mon, 4 Jun 2007 05:14:34 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Nov 2007 06:47:55 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Sep 2008 09:33:22 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Brightwell",
"Graham",
""
],
[
"Henson",
"Joe",
""
],
[
"Surya",
"Sumati",
""
]
] | Non-perturbative theories of quantum gravity inevitably include configurations that fail to resemble physically reasonable spacetimes at large scales. Often, these configurations are entropically dominant and pose an obstacle to obtaining the desired classical limit. We examine this "entropy problem" in a model of caus... |
2302.06545 | Roberto Maluf | F. M. Belchior, A. R. P. Moreira, R. V. Maluf and C. A. S. Almeida | 5D Elko spinor field non-minimally coupled to nonmetricity in $f(Q)$
gravity | 18 pages, 5 figures, matches published version in PLB | Phys. Lett. B, (2023), 138029 | 10.1016/j.physletb.2023.138029 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This paper aims to investigate the localization of the five-dimensional
spinor field known as Elko (dual-helicity eigenspinors of the charge
conjugation operator) by employing a Yukawa-like geometrical coupling in which
the Elko field is non-minimally coupled to nonmetricity scalar $Q$. We adopt
the braneworld scenar... | [
{
"created": "Mon, 13 Feb 2023 17:36:55 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Jun 2023 07:19:34 GMT",
"version": "v2"
}
] | 2023-06-21 | [
[
"Belchior",
"F. M.",
""
],
[
"Moreira",
"A. R. P.",
""
],
[
"Maluf",
"R. V.",
""
],
[
"Almeida",
"C. A. S.",
""
]
] | This paper aims to investigate the localization of the five-dimensional spinor field known as Elko (dual-helicity eigenspinors of the charge conjugation operator) by employing a Yukawa-like geometrical coupling in which the Elko field is non-minimally coupled to nonmetricity scalar $Q$. We adopt the braneworld scenario... |
1611.02611 | Carlos Ernesto Laciana | Carlos E. Laciana | A causal viscous cosmology without singularities | 16 pages | Gen Relativ Gravit (2017) 49; 62 | 10.1007/s10714-017-2215-x | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An isotropic and homogeneous cosmological model with a source of dark energy
is studied. That source is simulated with a viscous relativistic fluid with
minimal causal correction. In this model the restrictions on the parameters
coming from the following conditions are analized: a) energy density without
singularitie... | [
{
"created": "Tue, 8 Nov 2016 17:12:01 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Mar 2017 17:41:14 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Apr 2017 17:20:16 GMT",
"version": "v3"
}
] | 2017-04-20 | [
[
"Laciana",
"Carlos E.",
""
]
] | An isotropic and homogeneous cosmological model with a source of dark energy is studied. That source is simulated with a viscous relativistic fluid with minimal causal correction. In this model the restrictions on the parameters coming from the following conditions are analized: a) energy density without singularities ... |
gr-qc/0105110 | Giovanni Losurdo | G.Losurdo, G.Calamai, E.Cuoco, L.Fabbroni, G.Guidi, M.Mazzoni,
R.Stanga, F.Vetrano, L.Holloway, D.Passuello, G.Ballardin, S.Braccini,
C.Bradaschia, R.Cavalieri, R.Cecchi, G.Cella, V.Dattilo, A.Di Virgilio,
F.Fidecaro, F.Frasconi, A.Gennai, A.Giazotto, I.Ferrante, P.La Penna,
F.Lelli, T.Lomtadze, A.Marin, S.Manc... | Inertial control of the mirror suspensions of the VIRGO interferometer
for gravitational wave detection | 17 pages, 11 figures, accepted for publication on Review of
Scientific Instruments | Rev.Sci.Instrum. 72 (2001) 3653-3661 | 10.1063/1.1394189 | null | gr-qc | null | In order to achieve full detection sensitivity at low frequencies, the
mirrors of interferometric gravitational wave detectors must be isolated from
seismic noise. The VIRGO vibration isolator, called 'superattenuator', is fully
effective at frequencies above 4 Hz. Nevertheless, the residual motion of the
mirror at t... | [
{
"created": "Mon, 28 May 2001 16:30:35 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jun 2001 10:26:01 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Losurdo",
"G.",
""
],
[
"Calamai",
"G.",
""
],
[
"Cuoco",
"E.",
""
],
[
"Fabbroni",
"L.",
""
],
[
"Guidi",
"G.",
""
],
[
"Mazzoni",
"M.",
""
],
[
"Stanga",
"R.",
""
],
[
"Vetrano",
"F.",
""... | In order to achieve full detection sensitivity at low frequencies, the mirrors of interferometric gravitational wave detectors must be isolated from seismic noise. The VIRGO vibration isolator, called 'superattenuator', is fully effective at frequencies above 4 Hz. Nevertheless, the residual motion of the mirror at the... |
1905.08405 | Lijing Shao | Lijing Shao | Pulsar tests of the gravitational Lorentz violation | 4 pages; Presented at the Eighth Meeting on CPT and Lorentz Symmetry,
Bloomington, Indiana, May 12-16, 2019 | Proceedings of the Eighth Meeting on CPT and Lorentz Symmetry
(World Scientific, Singapore, 2020), p. 170 | 10.1142/9789811213984_0043 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Pulsars are precision celestial clocks. When being put in a binary, the
ticking conveys the secret of underlying spacetime geometrodynamics. We use
pulsars to test if the gravitational interaction possesses a tiny deviation
from Einstein's General Relativity (GR). In the framework of Standard-Model
Extension (SME), w... | [
{
"created": "Tue, 21 May 2019 02:05:36 GMT",
"version": "v1"
}
] | 2020-05-01 | [
[
"Shao",
"Lijing",
""
]
] | Pulsars are precision celestial clocks. When being put in a binary, the ticking conveys the secret of underlying spacetime geometrodynamics. We use pulsars to test if the gravitational interaction possesses a tiny deviation from Einstein's General Relativity (GR). In the framework of Standard-Model Extension (SME), we ... |
2308.11885 | Justin Feng | Justin C. Feng | Smooth metrics can hide thin shells | 2 pages, fixed typo | 2023 Class. Quantum Grav. 40 197002 | 10.1088/1361-6382/acf2de | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note, I consider a class of metric tensors with smooth components
that naively appear to describe dynamical wormholes with vanishing spacetime
curvature. I point out that the smoothness of the metric tensor components is
deceptive, and that in general relativity, such metrics must be sourced by
exotic thin sh... | [
{
"created": "Wed, 23 Aug 2023 03:04:38 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Sep 2023 12:02:13 GMT",
"version": "v2"
}
] | 2023-09-07 | [
[
"Feng",
"Justin C.",
""
]
] | In this note, I consider a class of metric tensors with smooth components that naively appear to describe dynamical wormholes with vanishing spacetime curvature. I point out that the smoothness of the metric tensor components is deceptive, and that in general relativity, such metrics must be sourced by exotic thin shel... |
2301.06999 | Kwinten Fransen | Kwinten Fransen | Quasinormal Modes from Penrose Limits | 27 pages, 9 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We use Penrose limits to approximate quasinormal modes with large real
frequencies. The Penrose limit associates a plane wave to a region of spacetime
near a null geodesic. This plane wave can be argued to geometrically realize
the geometrical optics approximation. Therefore, when applied to the bound null
orbits aro... | [
{
"created": "Tue, 17 Jan 2023 16:42:25 GMT",
"version": "v1"
}
] | 2023-01-18 | [
[
"Fransen",
"Kwinten",
""
]
] | We use Penrose limits to approximate quasinormal modes with large real frequencies. The Penrose limit associates a plane wave to a region of spacetime near a null geodesic. This plane wave can be argued to geometrically realize the geometrical optics approximation. Therefore, when applied to the bound null orbits aroun... |
gr-qc/0505080 | Sean A. Hayward | Sean A. Hayward | Gravitational radiation from dynamical black holes | 5 revtex4 pages. Additional comments | Class.Quant.Grav. 23 (2006) L15 | 10.1088/0264-9381/23/3/L01 | null | gr-qc | null | An effective energy tensor for gravitational radiation is identified for
uniformly expanding flows of the Hawking mass-energy. It appears in an energy
conservation law expressing the change in mass due to the energy densities of
matter and gravitational radiation, with respect to a Killing-like vector
encoding a pref... | [
{
"created": "Mon, 16 May 2005 17:18:26 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Dec 2005 21:26:35 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Hayward",
"Sean A.",
""
]
] | An effective energy tensor for gravitational radiation is identified for uniformly expanding flows of the Hawking mass-energy. It appears in an energy conservation law expressing the change in mass due to the energy densities of matter and gravitational radiation, with respect to a Killing-like vector encoding a prefer... |
2003.00477 | Tao Zhu | Cheng Liu, Tao Zhu, Qiang Wu, Kimet Jusufi, Mubasher Jamil, Mustapha
Azreg-A\"inou, and Anzhong Wang | Shadow and Quasinormal Modes of a Rotating Loop Quantum Black Hole | 21 pages, 12 figures; v2: several references added and version
published in Phys. Rev. D; some mistakes are corrected | Phys. Rev. D 101, 084001 (2020); Phys.Rev.D 103 (2021) 8, 089902
(erratum) | 10.1103/PhysRevD.101.084001 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we construct an effective rotating loop quantum black hole
(LQBH) solution, starting from the spherical symmetric LQBH by applying the
Newman-Janis algorithm modified by Azreg-A\"{i}nou's non-complexification
procedure, and study the effects of loop quantum gravity { (LQG) on its
shadow}. Given the rot... | [
{
"created": "Sun, 1 Mar 2020 12:27:37 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Apr 2020 03:07:34 GMT",
"version": "v2"
},
{
"created": "Mon, 10 May 2021 13:29:02 GMT",
"version": "v3"
}
] | 2021-05-11 | [
[
"Liu",
"Cheng",
""
],
[
"Zhu",
"Tao",
""
],
[
"Wu",
"Qiang",
""
],
[
"Jusufi",
"Kimet",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Azreg-Aïnou",
"Mustapha",
""
],
[
"Wang",
"Anzhong",
""
]
] | In this paper, we construct an effective rotating loop quantum black hole (LQBH) solution, starting from the spherical symmetric LQBH by applying the Newman-Janis algorithm modified by Azreg-A\"{i}nou's non-complexification procedure, and study the effects of loop quantum gravity { (LQG) on its shadow}. Given the rotat... |
gr-qc/9801010 | Beverly K. Berger | Beverly K. Berger | On the Nature of the Generic Big Bang | 7 pages, 5 figures, uses Revtex, epsf. Based on talk given at
Symposium on Frontiers of Fundamental Physics, Hyderabad, India, 11-12 Dec
1997 | null | null | null | gr-qc | null | Spatially homogeneous but possibly anisotropic cosmologies have two main
types of singularities: (1) asymptotically velocity term dominated (AVTD) -
(reversing the time direction) the universe evolves to the singularity with
fixed anisotropic collapse rates ; (2) Mixmaster-the anisotropic collapse rates
change in a d... | [
{
"created": "Tue, 6 Jan 1998 20:04:38 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Berger",
"Beverly K.",
""
]
] | Spatially homogeneous but possibly anisotropic cosmologies have two main types of singularities: (1) asymptotically velocity term dominated (AVTD) - (reversing the time direction) the universe evolves to the singularity with fixed anisotropic collapse rates ; (2) Mixmaster-the anisotropic collapse rates change in a det... |
gr-qc/9905047 | Felix Finster | Felix Finster, Niky Kamran, Joel Smoller, and Shing-Tung Yau | Non-Existence of Time-Periodic Solutions of the Dirac Equation in an
Axisymmetric Black Hole Geometry | 25 pages, 1 figure (published version), eigenvalues of angular
momentum in direction of symmetry axis corrected to be half odd integers | Commun.Pure Appl.Math. 53 (2000) 902-929, erratum Commun.Pure
Appl.Math. 53 (2000) 1201 | 10.1002/(SICI)1097-0312(200007)53:7<902::AID-CPA4>3.0.CO;2-4 | null | gr-qc math-ph math.DG math.MP | null | We prove that, in the non-extreme Kerr-Newman black hole geometry, the Dirac
equation has no normalizable, time-periodic solutions. A key tool is
Chandrasekhar's separation of the Dirac equation in this geometry. A similar
non-existence theorem is established in a more general class of stationary,
axisymmetric metric... | [
{
"created": "Fri, 14 May 1999 15:27:56 GMT",
"version": "v1"
},
{
"created": "Tue, 16 May 2000 09:28:57 GMT",
"version": "v2"
}
] | 2014-01-28 | [
[
"Finster",
"Felix",
""
],
[
"Kamran",
"Niky",
""
],
[
"Smoller",
"Joel",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | We prove that, in the non-extreme Kerr-Newman black hole geometry, the Dirac equation has no normalizable, time-periodic solutions. A key tool is Chandrasekhar's separation of the Dirac equation in this geometry. A similar non-existence theorem is established in a more general class of stationary, axisymmetric metrics ... |
2403.09364 | Etera R. Livine | Etera R. Livine | Spinfoam Models for Quantum Gravity: Overview | 13 pages (entry prepared for the Encyclopedia of Mathematical Physics
2nd edition) | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the quest of a physical theory of quantum gravity, spin foam models, or in
short spinfoams, propose a well-defined path integral summing over quantized
discrete space-time geometries. At the crossroad of topological quantum field
theory, dynamical triangulations, Regge calculus, and loop quantum gravity,
this fram... | [
{
"created": "Thu, 14 Mar 2024 13:13:47 GMT",
"version": "v1"
}
] | 2024-03-15 | [
[
"Livine",
"Etera R.",
""
]
] | In the quest of a physical theory of quantum gravity, spin foam models, or in short spinfoams, propose a well-defined path integral summing over quantized discrete space-time geometries. At the crossroad of topological quantum field theory, dynamical triangulations, Regge calculus, and loop quantum gravity, this framew... |
gr-qc/0103004 | Ugo Moschella | A. Yu. Kamenshchik, U. Moschella, V. Pasquier | An alternative to quintessence | 8 pages, latex. References and a new section added | Phys.Lett. B511 (2001) 265-268 | 10.1016/S0370-2693(01)00571-8 | null | gr-qc | null | We consider a FRW cosmological model with an exotic fluid known as Chaplygin
gas. We show that the resulting evolution of the universe is not in
disagreement with the current observation of cosmic acceleration. The model
predict an increasing value for the effective cosmological constant.
| [
{
"created": "Thu, 1 Mar 2001 16:36:41 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Mar 2001 16:30:06 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Kamenshchik",
"A. Yu.",
""
],
[
"Moschella",
"U.",
""
],
[
"Pasquier",
"V.",
""
]
] | We consider a FRW cosmological model with an exotic fluid known as Chaplygin gas. We show that the resulting evolution of the universe is not in disagreement with the current observation of cosmic acceleration. The model predict an increasing value for the effective cosmological constant. |
0707.3700 | Gianluca Mandanici | Gianluca Mandanici | Undeformed (additive) energy conservation law in Doubly Special
Relativity | 5 pages; A comparison with a previous analysis has been added | null | 10.1142/S0217732309030424 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | All the Doubly Special Relativity (DSR) models studied in literature so far
involve a deformation of the energy conservation rule that forces us to release
the hypothesis of the additivity of the energy for composite systems. In view
of the importance of the issue for a consistent formulation of a DSR
statistical mec... | [
{
"created": "Wed, 25 Jul 2007 10:08:43 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Nov 2008 20:30:56 GMT",
"version": "v2"
}
] | 2015-05-13 | [
[
"Mandanici",
"Gianluca",
""
]
] | All the Doubly Special Relativity (DSR) models studied in literature so far involve a deformation of the energy conservation rule that forces us to release the hypothesis of the additivity of the energy for composite systems. In view of the importance of the issue for a consistent formulation of a DSR statistical mecha... |
2201.03274 | Jay Solanki | Jay Solanki and Volker Perlick | Photon sphere and shadow of a time-dependent black hole described by a
Vaidya metric | Some details corrected, one figure and several references added | Phys. Rev. D, 105:064056, Mar 2022 | 10.1103/PhysRevD.105.064056 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper we derive exact analytical formulas for the evolution of the
photon sphere and for the angular radius of the shadow in a special Vaidya
spacetime. The Vaidya metric describes a spherically symmetric object that
gains or loses mass, depending on a mass function $m(v)$ that can be freely
chosen. Here we c... | [
{
"created": "Mon, 10 Jan 2022 10:43:16 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Mar 2022 04:12:03 GMT",
"version": "v2"
}
] | 2022-04-01 | [
[
"Solanki",
"Jay",
""
],
[
"Perlick",
"Volker",
""
]
] | In this paper we derive exact analytical formulas for the evolution of the photon sphere and for the angular radius of the shadow in a special Vaidya spacetime. The Vaidya metric describes a spherically symmetric object that gains or loses mass, depending on a mass function $m(v)$ that can be freely chosen. Here we con... |
1510.08298 | Hor\'acio Santana Vieira | H. S. Vieira | Resonant frequencies of the hydrodynamic vortex | 9 pages, 1 figure | Int. J. Mod. Phys. D 26 (2017) 1750035 | 10.1142/S0218271817500353 | null | gr-qc cond-mat.other math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the sound perturbation of the hydrodynamic vortex geometry and
present an exact expression for the resonant frequencies (quasispectrum) of
this geometry. Exact solution for the radial part of the covariant Klein-Gordon
equation in this spacetime is obtained, and is given in terms of the double
confluent Heun... | [
{
"created": "Wed, 28 Oct 2015 13:17:49 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Sep 2016 15:17:10 GMT",
"version": "v2"
}
] | 2016-09-27 | [
[
"Vieira",
"H. S.",
""
]
] | We study the sound perturbation of the hydrodynamic vortex geometry and present an exact expression for the resonant frequencies (quasispectrum) of this geometry. Exact solution for the radial part of the covariant Klein-Gordon equation in this spacetime is obtained, and is given in terms of the double confluent Heun f... |
1101.3660 | J. Fernando Barbero G. | Ivan Agullo, J. Fernando Barbero G., Enrique F. Borja, Jacobo
Diaz-Polo, Eduardo J. S. Villase\~nor | Detailed black hole state counting in loop quantum gravity | null | Phys.Rev.D82:084029,2010 | 10.1103/PhysRevD.82.084029 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a complete and detailed description of the computation of black hole
entropy in loop quantum gravity by employing the most recently introduced
number-theoretic and combinatorial methods. The use of these techniques allows
us to perform a detailed analysis of the precise structure of the entropy
spectrum for s... | [
{
"created": "Wed, 19 Jan 2011 10:48:02 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Agullo",
"Ivan",
""
],
[
"G.",
"J. Fernando Barbero",
""
],
[
"Borja",
"Enrique F.",
""
],
[
"Diaz-Polo",
"Jacobo",
""
],
[
"Villaseñor",
"Eduardo J. S.",
""
]
] | We give a complete and detailed description of the computation of black hole entropy in loop quantum gravity by employing the most recently introduced number-theoretic and combinatorial methods. The use of these techniques allows us to perform a detailed analysis of the precise structure of the entropy spectrum for sma... |
gr-qc/9411036 | Vassilevich Dmitri | Dmitri V. Vassilevich | QED on Curved Background and on Manifolds with Boundaries: Unitarity
versus Covariance | 29 pages, LaTEX, no figures | Phys.Rev. D52 (1995) 999-1010 | 10.1103/PhysRevD.52.999 | ICTP preprint IC/94/359 | gr-qc hep-th | null | Some recent results show that the covariant path integral and the integral
over physical degrees of freedom give contradicting results on curved
background and on manifolds with boundaries. This looks like a conflict between
unitarity and covariance. We argue that this effect is due to the use of
non-covariant measur... | [
{
"created": "Mon, 14 Nov 1994 15:40:30 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Vassilevich",
"Dmitri V.",
""
]
] | Some recent results show that the covariant path integral and the integral over physical degrees of freedom give contradicting results on curved background and on manifolds with boundaries. This looks like a conflict between unitarity and covariance. We argue that this effect is due to the use of non-covariant measure ... |
1307.2637 | Lijing Shao | Lijing Shao, Norbert Wex | New limits on the violation of local position invariance of gravity | 13 pages, 4 figures; accepted by Classical and Quantum Gravity | Class. Quantum Grav. 30 (2013) 165020 | 10.1088/0264-9381/30/16/165020 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the parameterized post-Newtonian (PPN) formalism, there could be an
anisotropy of local gravity induced by an external matter distribution, even
for a fully conservative metric theory of gravity. It reflects the breakdown of
the local position invariance of gravity and, within the PPN formalism, is
characteriz... | [
{
"created": "Wed, 10 Jul 2013 00:36:39 GMT",
"version": "v1"
}
] | 2013-08-02 | [
[
"Shao",
"Lijing",
""
],
[
"Wex",
"Norbert",
""
]
] | Within the parameterized post-Newtonian (PPN) formalism, there could be an anisotropy of local gravity induced by an external matter distribution, even for a fully conservative metric theory of gravity. It reflects the breakdown of the local position invariance of gravity and, within the PPN formalism, is characterized... |
1307.0034 | Igor Tanatarov | I. V. Tanatarov and O. B. Zaslavskii | Ba\~{n}ados-Silk-West effect with nongeodesic particles: extremal
horizons | 36 pages. To be published in PRD. Presentation improved, matches
accepted version | Phys. Rev. D 88, 064036 (2013) | 10.1103/PhysRevD.88.064036 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Ba\~{n}ados-Silk-West (BSW) effect consists in the possibility to obtain
arbitrarily large energy $E_{c.m.}$ in the centre of mass frame of two
colliding particles near the black hole horizon. One of the common beliefs was
that the action of force on these particles (say, due to gravitational
radiation) should ne... | [
{
"created": "Fri, 28 Jun 2013 21:47:34 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Sep 2013 14:41:34 GMT",
"version": "v2"
}
] | 2013-09-19 | [
[
"Tanatarov",
"I. V.",
""
],
[
"Zaslavskii",
"O. B.",
""
]
] | The Ba\~{n}ados-Silk-West (BSW) effect consists in the possibility to obtain arbitrarily large energy $E_{c.m.}$ in the centre of mass frame of two colliding particles near the black hole horizon. One of the common beliefs was that the action of force on these particles (say, due to gravitational radiation) should nece... |
1102.1688 | Frank Hellmann | Frank Hellmann | State Sums and Geometry | PhD Thesis, 106 pages | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by-nc-sa/3.0/ | In this thesis I review the definition of topological quantum field theories
through state sums on triangulated manifolds. I describe the construction of
state sum invariants of 3-manifolds from a graphical calculus and show how to
evaluate the invariants as boundary amplitudes. I review how to define such a
graphica... | [
{
"created": "Tue, 8 Feb 2011 18:57:44 GMT",
"version": "v1"
}
] | 2015-03-18 | [
[
"Hellmann",
"Frank",
""
]
] | In this thesis I review the definition of topological quantum field theories through state sums on triangulated manifolds. I describe the construction of state sum invariants of 3-manifolds from a graphical calculus and show how to evaluate the invariants as boundary amplitudes. I review how to define such a graphical ... |
gr-qc/0501063 | Elliot Fischer | Elliot Fischer | Similarity Solutions of the Einstein-Maxwell equations with 1 Killing
Vector | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | New similarity variables are introduced for the Einstein - Maxwell equations
with one Killing vector that reduce the non-linear partial differential
equations in three independent variables to ordinary differential equations.
These similarity variables are the extensions of those previously found for the
Einstein-Max... | [
{
"created": "Thu, 20 Jan 2005 14:51:07 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Feb 2016 17:03:25 GMT",
"version": "v2"
}
] | 2016-03-01 | [
[
"Fischer",
"Elliot",
""
]
] | New similarity variables are introduced for the Einstein - Maxwell equations with one Killing vector that reduce the non-linear partial differential equations in three independent variables to ordinary differential equations. These similarity variables are the extensions of those previously found for the Einstein-Maxwe... |
1910.04678 | Filipe Mena | Artur Alho, Vitor Bessa, Filipe C. Mena | Global dynamics of Yang-Mills field and perfect-fluid Robertson-Walker
cosmologies | 22 pages, 11 figures | J. Math. Phys. 61 (2020) 032502 | 10.1063/1.5139879 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply a new global dynamical systems formulation to flat Robertson-Walker
cosmologies with a massless and massive Yang-Mills field and a perfect-fluid
with linear equation of state as the matter sources. This allows us to give
proofs concerning the global dynamics of the models including asymptotic
source-dominanc... | [
{
"created": "Thu, 10 Oct 2019 16:32:05 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Apr 2020 15:53:19 GMT",
"version": "v2"
}
] | 2020-04-29 | [
[
"Alho",
"Artur",
""
],
[
"Bessa",
"Vitor",
""
],
[
"Mena",
"Filipe C.",
""
]
] | We apply a new global dynamical systems formulation to flat Robertson-Walker cosmologies with a massless and massive Yang-Mills field and a perfect-fluid with linear equation of state as the matter sources. This allows us to give proofs concerning the global dynamics of the models including asymptotic source-dominance ... |
gr-qc/0401112 | Miguel Sanchez | Antonio N. Bernal, Miguel S\'anchez | Smoothness of time functions and the metric splitting of globally
hyperbolic spacetimes | 9 pages, Latex, to appear in Commun. Math. Phys. Some comments on
time functions and stably causal spacetimes are incorporated, and referred to
gr-qc/0411143 for further details | Commun.Math.Phys. 257 (2005) 43-50 | 10.1007/s00220-005-1346-1 | null | gr-qc math.DG | null | The folk questions in Lorentzian Geometry, which concerns the smoothness of
time functions and slicings by Cauchy hypersurfaces, are solved by giving
simple proofs of: (a) any globally hyperbolic spacetime $(M,g)$ admits a smooth
time function $\tau$ whose levels are spacelike Cauchy hyperfurfaces and, thus,
also a s... | [
{
"created": "Wed, 28 Jan 2004 16:38:07 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Nov 2004 11:20:09 GMT",
"version": "v2"
},
{
"created": "Tue, 15 Feb 2005 18:45:19 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Bernal",
"Antonio N.",
""
],
[
"Sánchez",
"Miguel",
""
]
] | The folk questions in Lorentzian Geometry, which concerns the smoothness of time functions and slicings by Cauchy hypersurfaces, are solved by giving simple proofs of: (a) any globally hyperbolic spacetime $(M,g)$ admits a smooth time function $\tau$ whose levels are spacelike Cauchy hyperfurfaces and, thus, also a smo... |
1802.05562 | Fatimah Shojai | S. Cheraghchi, F. Shojai | On the initial conditions of scalar and tensor fluctuations in
$f(R,\phi)$ gravity | 11 pages | Eur. Phys. J. C (2018) 78:384 | 10.1140/epjc/s10052-018-5878-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have considered the perturbation equations governing the growth of
fluctuations in generalized scalar tensor theory during inflation. we have
found that the scalar metric perturbations at very early times are negligible
compared with the scalar field perturbation, just like general relativity. At
sufficiently earl... | [
{
"created": "Thu, 15 Feb 2018 14:28:56 GMT",
"version": "v1"
}
] | 2018-05-23 | [
[
"Cheraghchi",
"S.",
""
],
[
"Shojai",
"F.",
""
]
] | We have considered the perturbation equations governing the growth of fluctuations in generalized scalar tensor theory during inflation. we have found that the scalar metric perturbations at very early times are negligible compared with the scalar field perturbation, just like general relativity. At sufficiently early ... |
0904.3596 | J. Ponce de Leon | J. Ponce de Leon | Levi-Civita spacetimes in multidimensional theories | 7 pages. Accepted for publication in Mod. Phys. Lett. A (MPLA) | Mod.Phys.Lett.A24:1659-1667,2009 | 10.1142/S0217732309031004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain the most general static cylindrically symmetric vacuum solutions of
the Einstein field equations in $(4 + N)$ dimensions. Under the assumption of
separation of variables, we construct a family of Levi-Civita-Kasner vacuum
solutions in $(4 + N)$. We discuss the dimensional reduction of the static
solutions. ... | [
{
"created": "Thu, 23 Apr 2009 04:02:35 GMT",
"version": "v1"
}
] | 2009-08-13 | [
[
"de Leon",
"J. Ponce",
""
]
] | We obtain the most general static cylindrically symmetric vacuum solutions of the Einstein field equations in $(4 + N)$ dimensions. Under the assumption of separation of variables, we construct a family of Levi-Civita-Kasner vacuum solutions in $(4 + N)$. We discuss the dimensional reduction of the static solutions. De... |
1105.6194 | Ion I. Cotaescu | Ion I. Cotaescu | Discrete O(1,4) transformations and new scalar quantum modes on the de
Sitter spacetime | 6 pages no figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the isometry group of the de Sitter spacetime includes two
different three-dimensional Abelian subgroups which transform between
themselves through a discrete isometry corresponding to the time reversal in
the five-dimensional Minkowski spacetime embedding the de Sitter one. The
eigenfunctions of the... | [
{
"created": "Tue, 31 May 2011 07:58:07 GMT",
"version": "v1"
}
] | 2011-06-01 | [
[
"Cotaescu",
"Ion I.",
""
]
] | It is shown that the isometry group of the de Sitter spacetime includes two different three-dimensional Abelian subgroups which transform between themselves through a discrete isometry corresponding to the time reversal in the five-dimensional Minkowski spacetime embedding the de Sitter one. The eigenfunctions of the g... |
gr-qc/0108027 | F. Siddhartha Guzman | T. Matos and F. S. Guzman | On the Space Time of a Galaxy | 8 pages REVTeX, 11 eps figures | Class.Quant.Grav. 18 (2001) 5055-5064 | 10.1088/0264-9381/18/23/303 | null | gr-qc astro-ph hep-th | null | We present an exact solution of the averaged Einstein's field equations in
the presence of two real scalar fields and a component of dust with spherical
symmetry. We suggest that the space-time found provides the characteristics
required by a galactic model that could explain the supermassive central object
and the d... | [
{
"created": "Thu, 9 Aug 2001 02:26:46 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Matos",
"T.",
""
],
[
"Guzman",
"F. S.",
""
]
] | We present an exact solution of the averaged Einstein's field equations in the presence of two real scalar fields and a component of dust with spherical symmetry. We suggest that the space-time found provides the characteristics required by a galactic model that could explain the supermassive central object and the dar... |
gr-qc/0005124 | Gaetano Lambiase | V. Bozza, A. Feoli, G. Papini, G. Scarpetta | Maximal Acceleration Effects in Reissner-Nordstrom Space | LaTex file, 5 figures, no tables, to appear in Phys. Lett. A | Phys.Lett. A271 (2000) 35-43 | 10.1016/S0375-9601(00)00351-0 | null | gr-qc | null | The dynamics of a relativistic particle in a Reissner-Nordstrom background is
studied using Caianiello model with maximal acceleration. The behaviour of the
particle, embedded in a new effective geometry, changes with respect to the
classical scenario because of the formation of repulsive potential barriers
near the ... | [
{
"created": "Mon, 29 May 2000 15:29:54 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Bozza",
"V.",
""
],
[
"Feoli",
"A.",
""
],
[
"Papini",
"G.",
""
],
[
"Scarpetta",
"G.",
""
]
] | The dynamics of a relativistic particle in a Reissner-Nordstrom background is studied using Caianiello model with maximal acceleration. The behaviour of the particle, embedded in a new effective geometry, changes with respect to the classical scenario because of the formation of repulsive potential barriers near the ho... |
1410.5463 | Fabio Dahia | F. Dahia and Alex de Albuquerque Silva | Classical tests of General Relativity in thick branes | null | null | 10.1140/epjc/s10052-015-3307-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Classical tests of General Relativity in braneworld scenarios have been
investigated recently with the purpose of posing observational constraints on
parameters of some models of infinitely thin brane. Here we consider the motion
of test particles in a thick brane scenario that corresponds to a regularized
version of... | [
{
"created": "Mon, 20 Oct 2014 21:02:04 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Dahia",
"F.",
""
],
[
"Silva",
"Alex de Albuquerque",
""
]
] | Classical tests of General Relativity in braneworld scenarios have been investigated recently with the purpose of posing observational constraints on parameters of some models of infinitely thin brane. Here we consider the motion of test particles in a thick brane scenario that corresponds to a regularized version of t... |
2106.04343 | Lloyd Kannenberg | L. Kannenberg | A Note on Rainich's Condition in the Null Case | 5 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that bivectors are not necessary to satisfy the Rainich
conditions in the null case.
| [
{
"created": "Mon, 7 Jun 2021 13:32:13 GMT",
"version": "v1"
}
] | 2021-06-09 | [
[
"Kannenberg",
"L.",
""
]
] | It is shown that bivectors are not necessary to satisfy the Rainich conditions in the null case. |
0708.3145 | Yong-Wan Kim | Yun Soo Myung, Yong-Wan Kim, Young-Jai Park | Thermodynamics of regular black hole | 20 pages, 6 figures, version to appear in GRG | null | 10.1007/s10714-008-0690-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate thermodynamics for a magnetically charged regular black hole
(MCRBH), which comes from the action of general relativity and nonlinear
electromagnetics, comparing with the Reissner-Norstr\"om (RN) black hole in
both four and two dimensions after dimensional reduction. We find that there is
no thermodyna... | [
{
"created": "Thu, 23 Aug 2007 09:00:14 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Aug 2007 08:22:18 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Sep 2007 08:23:22 GMT",
"version": "v3"
},
{
"created": "Sun, 21 Sep 2008 15:27:05 GMT",
"version": "v4"
}
] | 2009-11-13 | [
[
"Myung",
"Yun Soo",
""
],
[
"Kim",
"Yong-Wan",
""
],
[
"Park",
"Young-Jai",
""
]
] | We investigate thermodynamics for a magnetically charged regular black hole (MCRBH), which comes from the action of general relativity and nonlinear electromagnetics, comparing with the Reissner-Norstr\"om (RN) black hole in both four and two dimensions after dimensional reduction. We find that there is no thermodynami... |
gr-qc/0508032 | Edward Porter | Edward K. Porter | Detecting gravitational waves from test-mass bodies orbiting a Kerr
black hole with P-approximant templates | 11 Pages - 9 figures. Accepted for publication. Proceedings of GWDAW
9. Special edition of Classical and Quantum Gravity | Class.Quant.Grav. 22 (2005) S1211-S1222 | 10.1088/0264-9381/22/18/S35 | null | gr-qc | null | In this study we apply post-Newtonian (T-approximants) and resummed
post-Newtonian (P-approximants) to the case of a test-particle in equatorial
orbit around a Kerr black hole. We compare the two approximants by measuring
their effectualness (i.e. larger overlaps with the exact signal), and
faithfulness (i.e. smaller... | [
{
"created": "Tue, 9 Aug 2005 12:51:35 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Porter",
"Edward K.",
""
]
] | In this study we apply post-Newtonian (T-approximants) and resummed post-Newtonian (P-approximants) to the case of a test-particle in equatorial orbit around a Kerr black hole. We compare the two approximants by measuring their effectualness (i.e. larger overlaps with the exact signal), and faithfulness (i.e. smaller b... |
0907.2154 | Christian Corda | Lorenzo Iorio and Christian Corda | Gravitomagnetic effect in gravitational waves | To appear in Proceedings of the 7th International Conference of
Numerical Analysis and Applied Mathematics, Rethymno, Crete (near to Chania),
Greece, 18-22 September 2009 | AIP Conf. Proc. Volume 1168, pp. 1072-1076, September 9, 2009 | 10.1063/1.3241239 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After an introduction emphasizing the importance of the gravitomag- netic
effect in general relativity, with a resume of some space-based appli- cations,
we discuss the so-called magnetic components of gravitational waves (GWs),
which have to be taken into account in the context of the total response
functions of int... | [
{
"created": "Mon, 13 Jul 2009 12:52:41 GMT",
"version": "v1"
}
] | 2010-01-22 | [
[
"Iorio",
"Lorenzo",
""
],
[
"Corda",
"Christian",
""
]
] | After an introduction emphasizing the importance of the gravitomag- netic effect in general relativity, with a resume of some space-based appli- cations, we discuss the so-called magnetic components of gravitational waves (GWs), which have to be taken into account in the context of the total response functions of inter... |
0710.5552 | Christian L\"ubbe | Christian L\"ubbe and Paul Tod | An extension theorem for conformal gauge singularities | 43 pages, no figures, version as published in JMP, small changes,
updated references | J.Math.Phys.50:112501,2009 | 10.1063/1.3239509 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse conformal gauge, or isotropic, singularities in cosmological
models in general relativity. Using the calculus of tractors, we find
conditions in terms of tractor curvature for a local extension of the conformal
structure through a cosmological singularity and prove a local extension
theorem.
| [
{
"created": "Mon, 29 Oct 2007 23:40:54 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Jun 2008 16:11:09 GMT",
"version": "v2"
},
{
"created": "Thu, 19 Nov 2009 11:52:07 GMT",
"version": "v3"
}
] | 2010-01-07 | [
[
"Lübbe",
"Christian",
""
],
[
"Tod",
"Paul",
""
]
] | We analyse conformal gauge, or isotropic, singularities in cosmological models in general relativity. Using the calculus of tractors, we find conditions in terms of tractor curvature for a local extension of the conformal structure through a cosmological singularity and prove a local extension theorem. |
1911.00528 | Francisco Nogueira Lima | A. S. Ribeiro, G. Alencar, R. R. Landim, F. N. Lima | Mass spectrum of scalar and gauge fields in the cosmological multiply
warped brane-world | F. N. Lima left the work | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we compute the massive modes of scalar and gauge fields in a
multiply warped brane-world scenario in six-dimensional spacetime with a
Freedman-Robertson-Walker (FRW) metric. The massive Kaluza-Klein (KK) modes of
the fields are split in two mass towers due to the presence of the warped in
both dimensio... | [
{
"created": "Fri, 1 Nov 2019 18:03:14 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Nov 2019 01:22:28 GMT",
"version": "v2"
}
] | 2019-11-13 | [
[
"Ribeiro",
"A. S.",
""
],
[
"Alencar",
"G.",
""
],
[
"Landim",
"R. R.",
""
],
[
"Lima",
"F. N.",
""
]
] | In this paper, we compute the massive modes of scalar and gauge fields in a multiply warped brane-world scenario in six-dimensional spacetime with a Freedman-Robertson-Walker (FRW) metric. The massive Kaluza-Klein (KK) modes of the fields are split in two mass towers due to the presence of the warped in both dimensions... |
1401.2057 | Giacomo Rosati | Francesco Cianfrani, Jerzy Kowalski-Glikman, Giacomo Rosati | Generally covariant formulation of Relative Locality in curved spacetime | null | Phys. Rev. D 89, 044039 (2014) | 10.1103/PhysRevD.89.044039 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a theory of particles moving in curved both momentum space and
spacetime, being a generalization of Relative Locality. We find that in order
to construct such theory, with desired symmetries, including the general
coordinate invariance, we have to use non local position variables. It turns
out that free ... | [
{
"created": "Thu, 9 Jan 2014 16:23:28 GMT",
"version": "v1"
}
] | 2014-03-05 | [
[
"Cianfrani",
"Francesco",
""
],
[
"Kowalski-Glikman",
"Jerzy",
""
],
[
"Rosati",
"Giacomo",
""
]
] | We construct a theory of particles moving in curved both momentum space and spacetime, being a generalization of Relative Locality. We find that in order to construct such theory, with desired symmetries, including the general coordinate invariance, we have to use non local position variables. It turns out that free pa... |
gr-qc/0010100 | Janna Levin | Janna Levin | The fate of chaotic binaries | New figures | Phys.Rev. D67 (2003) 044013 | 10.1103/PhysRevD.67.044013 | null | gr-qc astro-ph | null | A typical stellar mass black hole with a lighter companion is shown to
succumb to a chaotic precession of the orbital plane. As a result, the optimal
candidates for the direct detection of gravitational waves by Earth based
interferometers can show irregular modulation of the waveform during the last
orbits before pl... | [
{
"created": "Thu, 26 Oct 2000 23:49:39 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Mar 2002 18:41:52 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Mar 2002 21:54:40 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Levin",
"Janna",
""
]
] | A typical stellar mass black hole with a lighter companion is shown to succumb to a chaotic precession of the orbital plane. As a result, the optimal candidates for the direct detection of gravitational waves by Earth based interferometers can show irregular modulation of the waveform during the last orbits before plun... |
gr-qc/0012022 | Hiroko Koyama | Hiroko Koyama and Akira Tomimatsu | Asymptotic power-law tails of massive scalar fields in
Reissner-Nordstr\"{o}m background | 18 pages, 1 figure, accepted for publication in Physical Review D | Phys.Rev. D63 (2001) 064032 | 10.1103/PhysRevD.63.064032 | DPNU-00-41 | gr-qc | null | We investigate dominant late-time tail behaviors of massive scalar fields in
nearly extreme Reissner-Nordstr\"{o}m background. It is shown that the
oscillatory tail of the scalar fields has the decay rate of $t^{-5/6}$ at
asymptotically late times. The physical mechanism by which the asymptotic
$t^{-5/6}$ tail yields... | [
{
"created": "Wed, 6 Dec 2000 04:22:40 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Dec 2000 03:19:36 GMT",
"version": "v2"
}
] | 2007-10-02 | [
[
"Koyama",
"Hiroko",
""
],
[
"Tomimatsu",
"Akira",
""
]
] | We investigate dominant late-time tail behaviors of massive scalar fields in nearly extreme Reissner-Nordstr\"{o}m background. It is shown that the oscillatory tail of the scalar fields has the decay rate of $t^{-5/6}$ at asymptotically late times. The physical mechanism by which the asymptotic $t^{-5/6}$ tail yields a... |
1405.5745 | Mustapha Azreg-A\"inou | Mustapha Azreg-A\"inou, Glauber T. Marques, Manuel E. Rodrigues | Phantom black holes and critical phenomena | 13 pages, 9 figures. Minor revision. To appear in JCAP | JCAP07 (2014) 036 | 10.1088/1475-7516/2014/07/036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the two classes cosh and sinh of normal and phantom black holes
of Einstein-Maxwell-dilaton theory. The thermodynamics of these holes is
characterized by heat capacities that may have both signs depending on the
parameters of the theory. Leaving aside the normal Reissner-Nordstr\"om black
hole, it is show... | [
{
"created": "Thu, 22 May 2014 13:14:24 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jun 2014 11:03:56 GMT",
"version": "v2"
}
] | 2014-07-18 | [
[
"Azreg-Aïnou",
"Mustapha",
""
],
[
"Marques",
"Glauber T.",
""
],
[
"Rodrigues",
"Manuel E.",
""
]
] | We consider the two classes cosh and sinh of normal and phantom black holes of Einstein-Maxwell-dilaton theory. The thermodynamics of these holes is characterized by heat capacities that may have both signs depending on the parameters of the theory. Leaving aside the normal Reissner-Nordstr\"om black hole, it is shown ... |
1903.01998 | Hongyu Shen | Hongyu Shen, E. A. Huerta, Eamonn O'Shea, Prayush Kumar, Zhizhen Zhao | Statistically-informed deep learning for gravitational wave parameter
estimation | v4: 13 pages, 6 figures, First application of Neural Networks for
gravitational wave parameter posterior estimation across multiple events with
single training | Machine Learning: Science and Technology, Volume 3, Number 1, Year
2022 | 10.1088/2632-2153/ac3843 | null | gr-qc astro-ph.HE cs.AI cs.LG stat.ML | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce deep learning models to estimate the masses of the binary
components of black hole mergers, $(m_1,m_2)$, and three astrophysical
properties of the post-merger compact remnant, namely, the final spin, $a_f$,
and the frequency and damping time of the ringdown oscillations of the
fundamental $\ell=m=2$ bar ... | [
{
"created": "Tue, 5 Mar 2019 19:00:02 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Sep 2019 17:39:55 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Mar 2021 01:48:35 GMT",
"version": "v3"
},
{
"created": "Sun, 19 Dec 2021 06:45:22 GMT",
"version": "v4"
}
] | 2021-12-21 | [
[
"Shen",
"Hongyu",
""
],
[
"Huerta",
"E. A.",
""
],
[
"O'Shea",
"Eamonn",
""
],
[
"Kumar",
"Prayush",
""
],
[
"Zhao",
"Zhizhen",
""
]
] | We introduce deep learning models to estimate the masses of the binary components of black hole mergers, $(m_1,m_2)$, and three astrophysical properties of the post-merger compact remnant, namely, the final spin, $a_f$, and the frequency and damping time of the ringdown oscillations of the fundamental $\ell=m=2$ bar mo... |
0809.5040 | Mamdouh Wanas | M. I. Wanas | Dark Energy: A Missing Physical Ingredient | 9 pages, LaTeX- file. Penary talk presented at the sixth conference
on "Nuclear and Particle Physics", held in Luxor, Egypt, 17-21 November 2007 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent observation of supernovae type Ia show clearly that there is a large
scale repulsive force in the Universe. Neither of the four known fundamental
interactions can account for this repulsive force. Gravity is known to be the
interaction responsible for the large scale structure and evolution of the
Universe. Th... | [
{
"created": "Mon, 29 Sep 2008 18:45:43 GMT",
"version": "v1"
}
] | 2008-09-30 | [
[
"Wanas",
"M. I.",
""
]
] | Recent observation of supernovae type Ia show clearly that there is a large scale repulsive force in the Universe. Neither of the four known fundamental interactions can account for this repulsive force. Gravity is known to be the interaction responsible for the large scale structure and evolution of the Universe. The ... |
1009.5100 | Valentin Bonzom | Valentin Bonzom | G\'eom\'etrie quantique dans les mousses de spins : de la th\'eorie
topologique BF vers la relativit\'e g\'en\'erale | PhD. Thesis 2010, in French, Centre de Physique Th\'eorique | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Loop quantum gravity has provided us with a canonical framework especially
devised for background independent and diffeomorphism invariant gauge field
theories. In this quantization the fundamental excitations are called spin
network states, and in the context of general relativity, they give a meaning
to quantum geo... | [
{
"created": "Sun, 26 Sep 2010 15:00:25 GMT",
"version": "v1"
}
] | 2010-09-28 | [
[
"Bonzom",
"Valentin",
""
]
] | Loop quantum gravity has provided us with a canonical framework especially devised for background independent and diffeomorphism invariant gauge field theories. In this quantization the fundamental excitations are called spin network states, and in the context of general relativity, they give a meaning to quantum geome... |
2005.01418 | Takahisa Igata | Takahisa Igata | Particle dynamics in the Newtonian potential sourced by a homogeneous
circular ring | 18 pages, 1 figure; v2: minor revision; v3: published version | Phys. Rev. D 101, 124064 (2020) | 10.1103/PhysRevD.101.124064 | KEK-Cosmo-253, KEK-TH-2213 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Newtonian gravitational potential sourced by a homogeneous circular ring in
arbitrary dimensional Euclidean space takes a simple form if the spatial
dimension is even. In contrast, if the spatial dimension is odd, it is given in
a form that includes complete elliptic integrals. In this paper, we analyze the
dynamics ... | [
{
"created": "Mon, 4 May 2020 12:17:29 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Jun 2020 02:34:59 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Jun 2020 15:08:36 GMT",
"version": "v3"
}
] | 2020-06-30 | [
[
"Igata",
"Takahisa",
""
]
] | Newtonian gravitational potential sourced by a homogeneous circular ring in arbitrary dimensional Euclidean space takes a simple form if the spatial dimension is even. In contrast, if the spatial dimension is odd, it is given in a form that includes complete elliptic integrals. In this paper, we analyze the dynamics of... |
gr-qc/0611128 | Nicolas Yunes | Nicolas Yunes (Penn State) | Frankenstein's Glue: Transition functions for approximate solutions | 23 pages, 5 figures. Replaced with accepted version. Major
improvements to text, with added examples | Class.Quant.Grav.24:4313-4336,2007 | 10.1088/0264-9381/24/17/004 | IGPG-06/11-2 | gr-qc | null | Approximations are commonly employed to find approximate solutions to the
Einstein equations. These solutions, however, are usually only valid in some
specific spacetime region. A global solution can be constructed by gluing
approximate solutions together, but this procedure is difficult because
discontinuities can a... | [
{
"created": "Thu, 23 Nov 2006 20:56:59 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Aug 2007 13:02:04 GMT",
"version": "v2"
}
] | 2010-05-12 | [
[
"Yunes",
"Nicolas",
"",
"Penn State"
]
] | Approximations are commonly employed to find approximate solutions to the Einstein equations. These solutions, however, are usually only valid in some specific spacetime region. A global solution can be constructed by gluing approximate solutions together, but this procedure is difficult because discontinuities can ari... |
gr-qc/9309015 | Wai Suen | Edward Seidel and Wai-Mo Suen | Formation of Solitonic Stars Through Gravitational Cooling | 14 pages, 93-5 | Phys.Rev.Lett.72:2516-2519,1994 | 10.1103/PhysRevLett.72.2516 | null | gr-qc | null | We studied the formation of compact bosonic objects through a dissipationless
cooling mechanism. Implications of the existence of this mechanism are
discussed, including the abundance of bosonic stars in the universe, and the
possibility of ruling out the axion as a dark matter candidate.
| [
{
"created": "Tue, 14 Sep 1993 23:45:25 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Seidel",
"Edward",
""
],
[
"Suen",
"Wai-Mo",
""
]
] | We studied the formation of compact bosonic objects through a dissipationless cooling mechanism. Implications of the existence of this mechanism are discussed, including the abundance of bosonic stars in the universe, and the possibility of ruling out the axion as a dark matter candidate. |
gr-qc/9904026 | David I. Santiago | Ronald J. Adler, David I. Santiago | On Gravity and the Uncertainty Principle | Gravity Research Foundation essay. 14 pages Minor typos were
corrected | Mod.Phys.Lett. A14 (1999) 1371 | 10.1142/S0217732399001462 | null | gr-qc hep-th quant-ph | null | Heisenberg showed in the early days of quantum theory that the uncertainty
principle follows as a direct consequence of the quantization of
electromagnetic radiation in the form of photons. As we show here the
gravitational interaction of the photon and the particle being observed
modifies the uncertainty principle w... | [
{
"created": "Mon, 12 Apr 1999 03:33:37 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Apr 1999 01:10:06 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Adler",
"Ronald J.",
""
],
[
"Santiago",
"David I.",
""
]
] | Heisenberg showed in the early days of quantum theory that the uncertainty principle follows as a direct consequence of the quantization of electromagnetic radiation in the form of photons. As we show here the gravitational interaction of the photon and the particle being observed modifies the uncertainty principle wit... |
gr-qc/0607094 | Richard Woodard | T. Prokopec (U. Utrecht), N. C. Tsamis (U. Crete) and R. P. Woodard
(U. Florida) | Two Loop Scalar Bilinears for Inflationary SQED | 43 pages, LaTeX 2epsilon, 5 figures (using axodraw.sty) Version 2 has
updated references and important corrections to Tables 3-5 and to eqns
(139-141), (145-146), (153-155), (158) and (160) | Class.Quant.Grav.24:201-230,2007 | 10.1088/0264-9381/24/1/011 | UFIFT-QG-06-07 | gr-qc astro-ph hep-ph | null | We evaluate the one and two loop contributions to the expectation values of
two coincident and gauge invariant scalar bilinears in the theory of massless,
minimally coupled scalar quantum electrodynamics on a locally de Sitter
background. One of these bilinears is the product of two covariantly
differentiated scalars... | [
{
"created": "Sat, 22 Jul 2006 15:00:25 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Feb 2008 23:56:05 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Prokopec",
"T.",
"",
"U. Utrecht"
],
[
"Tsamis",
"N. C.",
"",
"U. Crete"
],
[
"Woodard",
"R. P.",
"",
"U. Florida"
]
] | We evaluate the one and two loop contributions to the expectation values of two coincident and gauge invariant scalar bilinears in the theory of massless, minimally coupled scalar quantum electrodynamics on a locally de Sitter background. One of these bilinears is the product of two covariantly differentiated scalars, ... |
1508.05010 | Anja Marunovic | Anja Marunovi\'c and Tomislav Prokopec | Topological inflation with graceful exit | 11 pages, 7 figures; matches published version | null | 10.1088/1475-7516/2016/04/052 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a class of models of topological inflation in which a
super-Hubble-sized global monopole seeds inflation. These models are attractive
since inflation starts from rather generic initial conditions, but their not so
attractive feature is that, unless symmetry is again restored, inflation never
ends. In t... | [
{
"created": "Thu, 20 Aug 2015 15:41:54 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Apr 2016 09:43:57 GMT",
"version": "v2"
}
] | 2016-05-04 | [
[
"Marunović",
"Anja",
""
],
[
"Prokopec",
"Tomislav",
""
]
] | We investigate a class of models of topological inflation in which a super-Hubble-sized global monopole seeds inflation. These models are attractive since inflation starts from rather generic initial conditions, but their not so attractive feature is that, unless symmetry is again restored, inflation never ends. In thi... |
gr-qc/9708006 | Boris N. Frolov | O. V. Babourova, B. N. Frolov (Department of Mathematics, Moscow State
Pedagogical University) | The variational theory of the perfect dilaton-spin fluid in a
Weyl-Cartan space | 25 July 1997. - 10 p. The variational procedure is improved, the
results being unchanged | Mod.Phys.Lett. A12 (1997) 2943-2950 | 10.1142/S021773239700306X | null | gr-qc | null | The variational theory of the perfect fluid with intrinsic spin and dilatonic
charge (dilaton-spin fluid) is developed. The spin tensor obeys the classical
Frenkel condition. The Lagrangian density of such fluid is stated, and the
equations of motion of the fluid, the Weyssenhoff-type evolution equation of
the spin t... | [
{
"created": "Mon, 4 Aug 1997 20:06:45 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Jan 1998 23:56:41 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Babourova",
"O. V.",
"",
"Department of Mathematics, Moscow State\n Pedagogical University"
],
[
"Frolov",
"B. N.",
"",
"Department of Mathematics, Moscow State\n Pedagogical University"
]
] | The variational theory of the perfect fluid with intrinsic spin and dilatonic charge (dilaton-spin fluid) is developed. The spin tensor obeys the classical Frenkel condition. The Lagrangian density of such fluid is stated, and the equations of motion of the fluid, the Weyssenhoff-type evolution equation of the spin ten... |
1001.4697 | Priscilla Canizares | Priscilla Canizares and Carlos F. Sopuerta (ICE, CSIC-IEEC) | Modelling Extreme-Mass-Ratio Inspirals using Pseudospectral Methods | 3 pages. To appear in Proceedings of the Twelfth Marcel Grossmann
Meeting on General Relativity, edited by Thibault Damour, Robert T Jantzen
and Remo Ruffini, World Scientific, Singapore, 2010 | null | null | null | gr-qc astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a new time-domain method for computing the self-force acting on
a scalar particle in a Schwarzschild geometry. The principal feature of our
method consists in the division of the spatial domain into several subdomains
and locating the particle at the interface betweem two them. In this way, we
avoid the ... | [
{
"created": "Tue, 26 Jan 2010 14:18:33 GMT",
"version": "v1"
}
] | 2010-01-27 | [
[
"Canizares",
"Priscilla",
"",
"ICE, CSIC-IEEC"
],
[
"Sopuerta",
"Carlos F.",
"",
"ICE, CSIC-IEEC"
]
] | We introduce a new time-domain method for computing the self-force acting on a scalar particle in a Schwarzschild geometry. The principal feature of our method consists in the division of the spatial domain into several subdomains and locating the particle at the interface betweem two them. In this way, we avoid the ne... |
gr-qc/0309096 | Stephane Fay | Stephane Fay | Isotropisation of Bianchi class A models with curvature for a minimally
coupled scalar tensor theory | 20 pages | Class.Quant.Grav.20:1363-1378,2003 | 10.1088/0264-9381/20/7/308 | null | gr-qc | null | We look for necessary isotropisation conditions of Bianchi class $A$ models
with curvature in presence of a massive and minimally coupled scalar field when
a function $\ell$ of the scalar field tends to a constant, diverges
monotonically or with sufficiently small oscillations. Isotropisation leads the
metric functio... | [
{
"created": "Fri, 19 Sep 2003 12:29:40 GMT",
"version": "v1"
}
] | 2009-01-07 | [
[
"Fay",
"Stephane",
""
]
] | We look for necessary isotropisation conditions of Bianchi class $A$ models with curvature in presence of a massive and minimally coupled scalar field when a function $\ell$ of the scalar field tends to a constant, diverges monotonically or with sufficiently small oscillations. Isotropisation leads the metric functions... |
gr-qc/0601135 | Rod Aros Mr. | Rodrigo Aros and Mauricio Contreras | Torsion induces Gravity | 4 pages, RevTex | Phys.Rev. D73 (2006) 087501 | 10.1103/PhysRevD.73.087501 | GACG/02/2006 | gr-qc | null | In this work the Poincare-Chern Simons and Anti de Sitter Chern Simons
gravities are studied. For both a solution that can be casted as a black hole
with manifest torsion is found. Those solutions resemble Schwarzschild and
Schwarzschild-AdS solutions respectively.
| [
{
"created": "Mon, 30 Jan 2006 19:03:06 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Aros",
"Rodrigo",
""
],
[
"Contreras",
"Mauricio",
""
]
] | In this work the Poincare-Chern Simons and Anti de Sitter Chern Simons gravities are studied. For both a solution that can be casted as a black hole with manifest torsion is found. Those solutions resemble Schwarzschild and Schwarzschild-AdS solutions respectively. |
gr-qc/9701045 | Esposito Giampiero | Giampiero Esposito and Cosimo Stornaiolo | Multimomentum Maps on Null Hypersurfaces | 13 pages, plain Tex | Nuovo Cim. B112 (1997) 1395-1403 | null | DSF preprint 97/4 | gr-qc | null | This paper studies the application of multimomentum maps to the constraint
analysis of general relativity on null hypersurfaces. It is shown that, unlike
the case of spacelike hypersurfaces, some constraints which are second class in
the Hamiltonian formalism turn out to contribute to the multimomentum map. To
recove... | [
{
"created": "Mon, 20 Jan 1997 18:10:03 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Esposito",
"Giampiero",
""
],
[
"Stornaiolo",
"Cosimo",
""
]
] | This paper studies the application of multimomentum maps to the constraint analysis of general relativity on null hypersurfaces. It is shown that, unlike the case of spacelike hypersurfaces, some constraints which are second class in the Hamiltonian formalism turn out to contribute to the multimomentum map. To recover ... |
gr-qc/0210106 | Robert D. Klauber | Robert D. Klauber | Analysis of the Anomalous Brillet and Hall Experimental Result | 19 pages, including 5 figures, 3 appendices, and references | Found.Phys.Lett. 17 (2004) 125-147 | null | null | gr-qc | null | The persistent, second order, anomalous signal found in the Brillet and Hall
experiment is derived by applying 4D differential geometry in the rotating
earth frame. By incorporating the off diagonal time-space components of the
rotating frame metric directly into the analysis, rather than arbitrarily
transforming the... | [
{
"created": "Wed, 30 Oct 2002 21:40:45 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Nov 2003 21:45:00 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Klauber",
"Robert D.",
""
]
] | The persistent, second order, anomalous signal found in the Brillet and Hall experiment is derived by applying 4D differential geometry in the rotating earth frame. By incorporating the off diagonal time-space components of the rotating frame metric directly into the analysis, rather than arbitrarily transforming them ... |
2307.00330 | Fengge Zhang | Fengge Zhang, Jia-Xi Feng, Xian Gao | Scalar induced gravitational waves in symmetric teleparallel gravity
with a parity-violating term | 32 pages,2 figures | Physical Review D,2023 | 10.1103/PhysRevD.108.063513 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves (GWs) are useful to test gravitational theories and to
probe the physics in the early universe. In this paper, we investigate the
scalar induced gravitational waves (SIGWs) in symmetric teleparallel gravity
with a parity-violating term. The presence of the parity-violating term leads
to the veloci... | [
{
"created": "Sat, 1 Jul 2023 13:01:07 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Sep 2023 02:50:17 GMT",
"version": "v2"
}
] | 2023-09-15 | [
[
"Zhang",
"Fengge",
""
],
[
"Feng",
"Jia-Xi",
""
],
[
"Gao",
"Xian",
""
]
] | Gravitational waves (GWs) are useful to test gravitational theories and to probe the physics in the early universe. In this paper, we investigate the scalar induced gravitational waves (SIGWs) in symmetric teleparallel gravity with a parity-violating term. The presence of the parity-violating term leads to the velocity... |
gr-qc/0410037 | Yoshiki Tsunesada | Yoshiki Tsunesada, Nobuyuki Kanda, Hiroyuki Nakano, Daisuke Tatsumi,
Masaki Ando, Misao Sasaki, Hideyuki Tagoshi, and Hirotaka Takahashi | On Detection of Black Hole Quasi-Normal Ringdowns: Detection Efficiency
and Waveform Parameter Determination in Matched Filtering | 10 pages, 10 figures | Phys.Rev.D71:103005,2005 | 10.1103/PhysRevD.71.103005 | OCU-PHYS-218, AP-GR-18 | gr-qc | null | Gravitational radiation from a slightly distorted black hole with ringdown
waveform is well understood in general relativity. It provides a probe for
direct observation of black holes and determination of their physical
parameters, masses and angular momenta (Kerr parameters). For ringdown searches
using data of grav... | [
{
"created": "Fri, 8 Oct 2004 06:09:49 GMT",
"version": "v1"
}
] | 2009-10-09 | [
[
"Tsunesada",
"Yoshiki",
""
],
[
"Kanda",
"Nobuyuki",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Tatsumi",
"Daisuke",
""
],
[
"Ando",
"Masaki",
""
],
[
"Sasaki",
"Misao",
""
],
[
"Tagoshi",
"Hideyuki",
""
],
... | Gravitational radiation from a slightly distorted black hole with ringdown waveform is well understood in general relativity. It provides a probe for direct observation of black holes and determination of their physical parameters, masses and angular momenta (Kerr parameters). For ringdown searches using data of gravit... |
1402.6821 | Narayan Banerjee | Nandan Roy and Narayan Banerjee | Quintessence Scalar Field: A Dynamical Systems Study | 13 pages, 9 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present work deals with a dynamical systems study of quintessence
potentials leading to the present accelerated expansion of the universe. The
principal interest is to check for late time attractors which give an
accelerated expansion for the universe. Two examples are worked out, namely the
exponential and the p... | [
{
"created": "Thu, 27 Feb 2014 08:28:46 GMT",
"version": "v1"
}
] | 2014-02-28 | [
[
"Roy",
"Nandan",
""
],
[
"Banerjee",
"Narayan",
""
]
] | The present work deals with a dynamical systems study of quintessence potentials leading to the present accelerated expansion of the universe. The principal interest is to check for late time attractors which give an accelerated expansion for the universe. Two examples are worked out, namely the exponential and the pow... |
0704.1173 | Xing-Hao Ye | Xing-Hao Ye, Qiang Lin | The Deviation of the Vacuum Refractive Index Induced by a Static
Gravitational Field | 5 pages, 6 figures | null | null | null | gr-qc | null | We analyzed the influence of static gravitational field on the vacuum and
proposed the concept of inhomogeneous vacuum. According to the observational
result of the light deflection in solar gravitational field as well as the
corresponding Fermat's principle in the general relativity, we derived an
analytical express... | [
{
"created": "Tue, 10 Apr 2007 02:47:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ye",
"Xing-Hao",
""
],
[
"Lin",
"Qiang",
""
]
] | We analyzed the influence of static gravitational field on the vacuum and proposed the concept of inhomogeneous vacuum. According to the observational result of the light deflection in solar gravitational field as well as the corresponding Fermat's principle in the general relativity, we derived an analytical expressio... |
1904.11344 | Hamideh Nadi | Hamideh Nadi, Behrouz Mirza, Zeinab Sherkatghanad, Zahra Mirzaiyan | Holographic entanglement first law for d + 1 dimensional rotating
cylindrical black holes | 14 Pages, 7 figures | Nuclear Physics B 949 (2019) 114822 | 10.1016/j.nuclphysb.2019.114822 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the holographic entanglement entropy for the rotating
cylindrical black holes in $d+1$ dimensions as perturbations over $AdS_{d+1}$.
This is accomplished based on the first order variation of the area functional
in arbitrary dimensions. For these types of black holes, the angular momentum
appears at the ... | [
{
"created": "Thu, 25 Apr 2019 13:58:17 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Mar 2020 14:24:03 GMT",
"version": "v2"
}
] | 2020-03-13 | [
[
"Nadi",
"Hamideh",
""
],
[
"Mirza",
"Behrouz",
""
],
[
"Sherkatghanad",
"Zeinab",
""
],
[
"Mirzaiyan",
"Zahra",
""
]
] | We calculate the holographic entanglement entropy for the rotating cylindrical black holes in $d+1$ dimensions as perturbations over $AdS_{d+1}$. This is accomplished based on the first order variation of the area functional in arbitrary dimensions. For these types of black holes, the angular momentum appears at the fi... |
gr-qc/0103028 | Jozef Sima | Miroslav Sukenik and Jozef Sima | Information, Expansive Nondecelerative Universe, and Superstring Theory | 4 pages, LaTeX | null | null | SS-01-04 | gr-qc | null | Stemming from relationships between a number of information describing a
system and entropy content of the system it is possible to determine maximal
cosmological time. The contribution manifests a compatibility of the
superstring theory and the model of Expansive Nondecelerative Universe.
| [
{
"created": "Fri, 9 Mar 2001 10:51:42 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sukenik",
"Miroslav",
""
],
[
"Sima",
"Jozef",
""
]
] | Stemming from relationships between a number of information describing a system and entropy content of the system it is possible to determine maximal cosmological time. The contribution manifests a compatibility of the superstring theory and the model of Expansive Nondecelerative Universe. |
2012.13020 | Roman Konoplya | R. A. Konoplya | Conformal Weyl gravity via two stages of quasinormal ringing and
late-time behavior | 7 pages, 4 figures, revtex, the version to match the published one | Phys. Rev. D 103, 044033 (2021) | 10.1103/PhysRevD.103.044033 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Black hole (BH) solution in the conformal Weyl gravity is a generalization of
the Schwarzschild spacetime which includes two additional constants appearing
when integrating the third order differential equations for gravitational
field. One constant looks like the effective cosmological constant providing
the de Sitt... | [
{
"created": "Wed, 23 Dec 2020 23:10:04 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Feb 2021 23:11:14 GMT",
"version": "v2"
}
] | 2021-02-24 | [
[
"Konoplya",
"R. A.",
""
]
] | Black hole (BH) solution in the conformal Weyl gravity is a generalization of the Schwarzschild spacetime which includes two additional constants appearing when integrating the third order differential equations for gravitational field. One constant looks like the effective cosmological constant providing the de Sitter... |
1806.01301 | Emmanuil Saridakis | Emmanuel N. Saridakis, Kazuharu Bamba, R. Myrzakulov, Fotios K.
Anagnostopoulos | Holographic dark energy through Tsallis entropy | 8 pages, 3 figures, version published in JCAP | JCAP 1812 (2018) no.12, 012 | 10.1088/1475-7516/2018/12/012 | FU-PCG-36 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to apply holography and entropy relations to the whole universe,
which is a gravitational and thus nonextensive system, for consistency one
should use the generalized definition for the universe horizon entropy, namely
Tsallis nonextensive entropy. We formulate Tsallis holographic dark energy,
which is a gen... | [
{
"created": "Mon, 4 Jun 2018 18:07:21 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Dec 2018 08:34:50 GMT",
"version": "v2"
}
] | 2018-12-12 | [
[
"Saridakis",
"Emmanuel N.",
""
],
[
"Bamba",
"Kazuharu",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Anagnostopoulos",
"Fotios K.",
""
]
] | In order to apply holography and entropy relations to the whole universe, which is a gravitational and thus nonextensive system, for consistency one should use the generalized definition for the universe horizon entropy, namely Tsallis nonextensive entropy. We formulate Tsallis holographic dark energy, which is a gener... |
1701.00226 | Cosimo Bambi | Cosimo Bambi, Zheng Cao, Leonardo Modesto | Testing conformal gravity with astrophysical black holes | 5 pages, 2 figures. v2: refereed version | Phys. Rev. D 98, 024007 (2018) | 10.1103/PhysRevD.98.024007 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Weyl conformal symmetry can solve the problem the spacetime singularities
present in Einstein's gravity. In a recent paper, two of us have found a
singularity-free rotating black hole solution in conformal gravity. In addition
to the mass $M$ and the spin angular momentum $J$ of the black hole, the new
solution has a... | [
{
"created": "Sun, 1 Jan 2017 11:21:17 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Mar 2017 19:43:15 GMT",
"version": "v2"
}
] | 2018-07-11 | [
[
"Bambi",
"Cosimo",
""
],
[
"Cao",
"Zheng",
""
],
[
"Modesto",
"Leonardo",
""
]
] | Weyl conformal symmetry can solve the problem the spacetime singularities present in Einstein's gravity. In a recent paper, two of us have found a singularity-free rotating black hole solution in conformal gravity. In addition to the mass $M$ and the spin angular momentum $J$ of the black hole, the new solution has a n... |
1802.06486 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | Attractor Cosmology from non-minimally Coupled Gravity | PRD Accepted | null | 10.1103/PhysRevD.97.064005 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By using a bottom-up reconstruction technique for non-minimally coupled
scalar-tensor theories, we realize the Einstein frame attractor cosmologies in
the $\Omega (\phi)$-Jordan frame. For our approach, what is needed for the
reconstruction method to work is the functional form of the non-minimal
coupling $\Omega(\ph... | [
{
"created": "Mon, 19 Feb 2018 01:53:35 GMT",
"version": "v1"
}
] | 2018-04-04 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | By using a bottom-up reconstruction technique for non-minimally coupled scalar-tensor theories, we realize the Einstein frame attractor cosmologies in the $\Omega (\phi)$-Jordan frame. For our approach, what is needed for the reconstruction method to work is the functional form of the non-minimal coupling $\Omega(\phi)... |
gr-qc/0607132 | Douglas Shaw | John D. Barrow and Douglas J. Shaw | Observable Effects of Scalar Fields and Varying Constants | Invited Festscrift Article | Gen.Rel.Grav.39:1235-1257,2007 | 10.1007/s10714-007-0453-z | null | gr-qc astro-ph | null | We show by using the method of matched asymptotic expansions that a
sufficient condition can be derived which determines when a local experiment
will detect the cosmological variation of a scalar field which is driving the
spacetime variation of a supposed constant of Nature. We extend our earlier
analyses of this pr... | [
{
"created": "Fri, 28 Jul 2006 15:51:02 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Barrow",
"John D.",
""
],
[
"Shaw",
"Douglas J.",
""
]
] | We show by using the method of matched asymptotic expansions that a sufficient condition can be derived which determines when a local experiment will detect the cosmological variation of a scalar field which is driving the spacetime variation of a supposed constant of Nature. We extend our earlier analyses of this prob... |
2402.13047 | Jo\~ao Lu\'is Rosa | Caio F. B. Macedo, Jo\~ao Lu\'is Rosa, Diego Rubiera-Garcia | Optical appearance of black holes surrounded by a dark matter halo | 21 pages, 17 figures | JCAP07(2024)046 | 10.1088/1475-7516/2024/07/046 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes in General Relativity are described by space-time metrics that
are simpler in comparison to non-vacuum compact objects. However, given the
universality of the gravitational pull, it is expected that dark matter
accumulates around astrophysical black holes, which can have an impact in the
overall gravitati... | [
{
"created": "Tue, 20 Feb 2024 14:35:54 GMT",
"version": "v1"
}
] | 2024-07-23 | [
[
"Macedo",
"Caio F. B.",
""
],
[
"Rosa",
"João Luís",
""
],
[
"Rubiera-Garcia",
"Diego",
""
]
] | Black holes in General Relativity are described by space-time metrics that are simpler in comparison to non-vacuum compact objects. However, given the universality of the gravitational pull, it is expected that dark matter accumulates around astrophysical black holes, which can have an impact in the overall gravitation... |
2009.03453 | Paul R. Anderson | Paul R. Anderson, Shohreh Gholizadeh Siahmazgi, Raymond D. Clark, and
Alessandro Fabbri | Method to compute the stress-energy tensor for a quantized scalar field
when a black hole forms from the collapse of a null shell | 40 pages, 4 figures | Phys. Rev. D 102, 125035 (2020) | 10.1103/PhysRevD.102.125035 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A method is given to compute the stress-energy tensor for a massless
minimally coupled scalar field in a spacetime where a black hole forms from the
collapse of a spherically symmetric null shell in four dimensions. Part of the
method involves matching the modes for the in vacuum state to a complete set of
modes in S... | [
{
"created": "Mon, 7 Sep 2020 23:09:50 GMT",
"version": "v1"
}
] | 2021-01-04 | [
[
"Anderson",
"Paul R.",
""
],
[
"Siahmazgi",
"Shohreh Gholizadeh",
""
],
[
"Clark",
"Raymond D.",
""
],
[
"Fabbri",
"Alessandro",
""
]
] | A method is given to compute the stress-energy tensor for a massless minimally coupled scalar field in a spacetime where a black hole forms from the collapse of a spherically symmetric null shell in four dimensions. Part of the method involves matching the modes for the in vacuum state to a complete set of modes in Sch... |
gr-qc/0512129 | Slava G. Turyshev | Slava G. Turyshev | The Science, Technology and Mission Design for the Laser Astrometric
Test of Relativity | 16 pages, 13 figures, 2 tables. To appear in proceedings of the "2006
IEEE Aerospace Conference," Big Sky, MT, March 4-11, 2006 | null | null | null | gr-qc | null | The Laser Astrometric Test of Relativity (LATOR) is a Michelson-Morley-type
experiment designed to test the Einstein's general theory of relativity in the
most intense gravitational environment available in the solar system -- the
close proximity to the Sun. By using independent time-series of highly accurate
measure... | [
{
"created": "Thu, 22 Dec 2005 06:46:10 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Turyshev",
"Slava G.",
""
]
] | The Laser Astrometric Test of Relativity (LATOR) is a Michelson-Morley-type experiment designed to test the Einstein's general theory of relativity in the most intense gravitational environment available in the solar system -- the close proximity to the Sun. By using independent time-series of highly accurate measureme... |
1508.00650 | Miguel Cruz | Miguel Cruz, Manuel Gonzalez-Espinoza, Joel Saavedra and Diego
Vargas-Arancibia | Scalar Perturbations of two-dimensional Horava-Lifshitz Black Holes | 18 pages, 1 figure. Accepted version in EPJC. arXiv admin note: text
overlap with arXiv:gr-qc/0701099 | Eur. Phys. J. C 76:75 (2016) | 10.1140/epjc/s10052-016-3927-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we study the stability of black hole solutions found in the
context of dilatonic Horava-Lifshitz gravity in $1+1$ dimensions by means of
the quasinormal modes approach. In order to find the corresponding quasinormal
modes, we consider the perturbations of massive and massless scalar fields
minimally ... | [
{
"created": "Tue, 4 Aug 2015 03:17:21 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Feb 2016 04:23:43 GMT",
"version": "v2"
}
] | 2016-02-22 | [
[
"Cruz",
"Miguel",
""
],
[
"Gonzalez-Espinoza",
"Manuel",
""
],
[
"Saavedra",
"Joel",
""
],
[
"Vargas-Arancibia",
"Diego",
""
]
] | In this article, we study the stability of black hole solutions found in the context of dilatonic Horava-Lifshitz gravity in $1+1$ dimensions by means of the quasinormal modes approach. In order to find the corresponding quasinormal modes, we consider the perturbations of massive and massless scalar fields minimally co... |
0706.1109 | Roy Kerr | Roy P. Kerr | Discovering the Kerr and Kerr-Schild metrics | 34 pages, 2 figures, cupbook.cls. To appear in "The Kerr Spacetime",
Eds D.L. Wiltshire, M. Visser and S.M. Scott, Cambridge Univ. Press | null | null | null | gr-qc | null | An historical account of the reasoning that led to the discovery of the Kerr
and Kerr-Schild metrics in 1963-1964, and their physical interpretation as
rotating black holes, is presented.
| [
{
"created": "Fri, 8 Jun 2007 04:21:18 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jan 2008 22:52:40 GMT",
"version": "v2"
}
] | 2008-01-15 | [
[
"Kerr",
"Roy P.",
""
]
] | An historical account of the reasoning that led to the discovery of the Kerr and Kerr-Schild metrics in 1963-1964, and their physical interpretation as rotating black holes, is presented. |
1910.10000 | Tays Miranda De Andrade | Tays Miranda, Emmanuel Frion and David Wands | Stochastic collapse | 1 figure, 3 tables. Version matching the one published in JCAP | JCAP 2001 (2020) no.01, 026 | 10.1088/1475-7516/2020/01/026 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate cosmological models described by a scalar field with an
exponential potential, and apply the stochastic formalism, which allows us to
study how quantum field fluctuations give rise to stochastic noise. This
modifies the classical dynamics of the scalar field at large scales, above a
coarse-graining sca... | [
{
"created": "Tue, 22 Oct 2019 14:17:15 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Jan 2020 15:14:44 GMT",
"version": "v2"
}
] | 2020-01-24 | [
[
"Miranda",
"Tays",
""
],
[
"Frion",
"Emmanuel",
""
],
[
"Wands",
"David",
""
]
] | We investigate cosmological models described by a scalar field with an exponential potential, and apply the stochastic formalism, which allows us to study how quantum field fluctuations give rise to stochastic noise. This modifies the classical dynamics of the scalar field at large scales, above a coarse-graining scale... |
2112.06861 | LSC P&P Committee | The LIGO Scientific Collaboration, the Virgo Collaboration, and the
KAGRA Collaboration: R. Abbott, H. Abe, F. Acernese, K. Ackley, N. Adhikari,
R. X. Adhikari, V. K. Adkins, V. B. Adya, C. Affeldt, D. Agarwal, M. Agathos,
K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, T.
Akutsu, P. F. de ... | Tests of General Relativity with GWTC-3 | null | null | null | LIGO-P2100275 | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | The ever-increasing number of detections of gravitational waves (GWs) from
compact binaries by the Advanced LIGO and Advanced Virgo detectors allows us to
perform ever-more sensitive tests of general relativity (GR) in the dynamical
and strong-field regime of gravity. We perform a suite of tests of GR using the
compa... | [
{
"created": "Mon, 13 Dec 2021 18:19:04 GMT",
"version": "v1"
}
] | 2021-12-14 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"the KAGRA Collaboration",
"",
""
],
[
"Abbott",
"R.",
""
],
[
"Abe",
"H.",
""
],
[
"Acernese",
"F.",
""
],
[
"Ackley",
"K... | The ever-increasing number of detections of gravitational waves (GWs) from compact binaries by the Advanced LIGO and Advanced Virgo detectors allows us to perform ever-more sensitive tests of general relativity (GR) in the dynamical and strong-field regime of gravity. We perform a suite of tests of GR using the compact... |
gr-qc/0501093 | Sergei Alexandrov | Sergei Alexandrov and Zoltan Kadar | Timelike surfaces in Lorentz covariant loop gravity and spin foam models | a wrong sign corrected in equation (65) | Class.Quant.Grav. 22 (2005) 3491-3510 | 10.1088/0264-9381/22/17/010 | SPIN-05/03, ITP-05/05 | gr-qc | null | We construct a canonical formulation of general relativity for the case of a
timelike foliation of spacetime. The formulation possesses explicit covariance
with respect to Lorentz transformations in the tangent space. Applying the loop
approach to quantize the theory we derive the spectrum of the area operator of
a t... | [
{
"created": "Fri, 28 Jan 2005 16:11:42 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Oct 2005 14:54:42 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Alexandrov",
"Sergei",
""
],
[
"Kadar",
"Zoltan",
""
]
] | We construct a canonical formulation of general relativity for the case of a timelike foliation of spacetime. The formulation possesses explicit covariance with respect to Lorentz transformations in the tangent space. Applying the loop approach to quantize the theory we derive the spectrum of the area operator of a two... |
1110.1321 | Julio Cesar Fabris | J. D. Barrow, A. B. Batista, G. Dito, J. C. Fabris, M. J. S. Houndjo | Sudden singularities survive massive quantum particle production | Latex file, 13 pages. New references, enlarged discussions in the
Introduction and in the Conclusions and some other minor modifications.
Accepted for publication in Physical Review D | Phys. Rev. D 84, 123518 (2011) | 10.1103/PhysRevD.84.123518 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We solve the Klein-Gordon equation for a massive, non-minimally coupled
scalar field, with a conformal coupling, undergoing cosmological evolution from
a radiation-dominated phase to a future sudden singularity. We show that, after
regularisation, the energy of the created particles is zero and the
back-reaction from... | [
{
"created": "Thu, 6 Oct 2011 16:53:59 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Dec 2011 11:31:33 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Jun 2012 11:27:23 GMT",
"version": "v3"
}
] | 2013-05-29 | [
[
"Barrow",
"J. D.",
""
],
[
"Batista",
"A. B.",
""
],
[
"Dito",
"G.",
""
],
[
"Fabris",
"J. C.",
""
],
[
"Houndjo",
"M. J. S.",
""
]
] | We solve the Klein-Gordon equation for a massive, non-minimally coupled scalar field, with a conformal coupling, undergoing cosmological evolution from a radiation-dominated phase to a future sudden singularity. We show that, after regularisation, the energy of the created particles is zero and the back-reaction from q... |
2005.00483 | Juliano Neves | Juliano C. S. Neves | Constraining the tidal charge of brane black holes using their shadows | 9 pages, 2 figures, 1 table. V2 with minor changes and new
references. Published in The European Physical Journal C | Eur. Phys. J. C 80, 717 (2020) | 10.1140/epjc/s10052-020-8321-z | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A constraint on the tidal charge generated within a brane world is shown.
Using the shadow of a rotating black hole in a brane context in order to
describe the M87* parameters recently announced by the Event Horizon Telescope
Collaboration, the deviation from circularity of the reported shadow produces
an upper bound... | [
{
"created": "Fri, 1 May 2020 16:55:12 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Aug 2020 14:09:28 GMT",
"version": "v2"
}
] | 2020-08-11 | [
[
"Neves",
"Juliano C. S.",
""
]
] | A constraint on the tidal charge generated within a brane world is shown. Using the shadow of a rotating black hole in a brane context in order to describe the M87* parameters recently announced by the Event Horizon Telescope Collaboration, the deviation from circularity of the reported shadow produces an upper bound o... |
gr-qc/0304045 | Ozgur Delice | Metin Arik and Ozgur Delice | Multiple Photonic Shells Around a Line Singularity | 6 pages | Gen.Rel.Grav. 35 (2003) 1285-1290 | 10.1023/A:1024458026755 | null | gr-qc | null | Line singularities including cosmic strings may be screened by photonic
shells until they appear as a planar wall.
| [
{
"created": "Thu, 10 Apr 2003 17:50:53 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Arik",
"Metin",
""
],
[
"Delice",
"Ozgur",
""
]
] | Line singularities including cosmic strings may be screened by photonic shells until they appear as a planar wall. |
1809.07992 | Roberto Peron Dr. | David Lucchesi, Luciano Anselmo, Massimo Bassan, Carmelo Magnafico,
Carmen Pardini, Roberto Peron, Giuseppe Pucacco, Ruggero Stanga, Massimo
Visco | Satellite Laser Ranging and General Relativity measurements in the field
of the Earth: state of the art and perspectives | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent results of the LARASE research program in terms of models improvements
and relativistic measurements are presented. In particular, the results
regarding the development of new models for the non-gravitational perturbations
that affect the orbit of the LAGEOS and LARES satellites are described and
discussed. Th... | [
{
"created": "Fri, 21 Sep 2018 09:09:10 GMT",
"version": "v1"
}
] | 2018-09-24 | [
[
"Lucchesi",
"David",
""
],
[
"Anselmo",
"Luciano",
""
],
[
"Bassan",
"Massimo",
""
],
[
"Magnafico",
"Carmelo",
""
],
[
"Pardini",
"Carmen",
""
],
[
"Peron",
"Roberto",
""
],
[
"Pucacco",
"Giuseppe",
""
]... | Recent results of the LARASE research program in terms of models improvements and relativistic measurements are presented. In particular, the results regarding the development of new models for the non-gravitational perturbations that affect the orbit of the LAGEOS and LARES satellites are described and discussed. Thes... |
gr-qc/9307030 | Mourad | J.Madore and J. Mourad | A Noncommutative Extension of Gravity | 4 pages. Talk delivered at the 'journ\'ees Relativistes 93' | Int.J.Mod.Phys.D3:221-224,1994 | 10.1142/S0218271894000332 | null | gr-qc | null | The commutative algebra of functions on a manifold is extended to a
noncommutative algebra by considering its tensor product with the algebra of
nxn complex matrices. Noncommutative geometry is used to formulate an extension
of the Einstein-Hilbert action. The result is shown to be equivalent to the
usual Kaluza-Klei... | [
{
"created": "Thu, 22 Jul 1993 16:55:13 GMT",
"version": "v1"
}
] | 2011-04-20 | [
[
"Madore",
"J.",
""
],
[
"Mourad",
"J.",
""
]
] | The commutative algebra of functions on a manifold is extended to a noncommutative algebra by considering its tensor product with the algebra of nxn complex matrices. Noncommutative geometry is used to formulate an extension of the Einstein-Hilbert action. The result is shown to be equivalent to the usual Kaluza-Klein ... |
gr-qc/0108002 | Volker Perlick | Wolfgang Hasse and Volker Perlick | Gravitational lensing in spherically symmetric static spacetimes with
centrifugal force reversal | 18 pages, 3 eps-figures | Gen.Rel.Grav.34:415-433,2002 | 10.1023/A:1015384604371 | AEI-2001-100 | gr-qc | null | In Schwarzschild spacetime the value $r=3m$ of the radius coordinate is
characterized by three different properties: (a) there is a ``light sphere'',
(b) there is ``centrifugal force reversal'', (c) it is the upper limiting
radius for a non-transparent Schwarschild source to act as a gravitational lens
that produces ... | [
{
"created": "Wed, 1 Aug 2001 15:02:14 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Hasse",
"Wolfgang",
""
],
[
"Perlick",
"Volker",
""
]
] | In Schwarzschild spacetime the value $r=3m$ of the radius coordinate is characterized by three different properties: (a) there is a ``light sphere'', (b) there is ``centrifugal force reversal'', (c) it is the upper limiting radius for a non-transparent Schwarschild source to act as a gravitational lens that produces in... |
2211.07002 | Hang Yu | Hang Yu and Nevin N. Weinberg and Phil Arras and James Kwon and
Tejaswi Venumadhav | Beyond the linear tide: impact of the non-linear tidal response of
neutron stars on gravitational waveforms from binary inspirals | 20 pages, 9 figures. Accepted for publication in MNRAS | null | 10.1093/mnras/stac3614 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by-nc-sa/4.0/ | Tidal interactions in coalescing binary neutron stars modify the dynamics of
the inspiral and hence imprint a signature on their gravitational wave (GW)
signals in the form of an extra phase shift. We need accurate models for the
tidal phase shift in order to constrain the supranuclear equation of state from
observat... | [
{
"created": "Sun, 13 Nov 2022 19:43:44 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Jan 2023 23:10:39 GMT",
"version": "v2"
}
] | 2023-01-10 | [
[
"Yu",
"Hang",
""
],
[
"Weinberg",
"Nevin N.",
""
],
[
"Arras",
"Phil",
""
],
[
"Kwon",
"James",
""
],
[
"Venumadhav",
"Tejaswi",
""
]
] | Tidal interactions in coalescing binary neutron stars modify the dynamics of the inspiral and hence imprint a signature on their gravitational wave (GW) signals in the form of an extra phase shift. We need accurate models for the tidal phase shift in order to constrain the supranuclear equation of state from observatio... |
0711.2279 | Andrew DeBenedictis | A. DeBenedictis | Developments in Black Hole Research: Classical, Semi-classical, and
Quantum | 59 pages, 17 figures (some are quality reduced due to file size
restrictions). Version 2 has extra references and minor changes to match
version for publication. Invited chapter to appear in an edited collection
'Classical and Quantum Gravity Research', Nova Science Publishers | Classical and Quantum Gravity Research, 371-426, (2008), Nova Sci.
Pub. ISBN 978-1-60456-366-5 | null | null | gr-qc | null | The possible existence of black holes has fascinated scientists at least
since Michell and Laplace's proposal that a gravitating object could exist from
which light could not escape. In the 20th century, in light of the general
theory of relativity, it became apparent that, were such objects to exist,
their structure... | [
{
"created": "Wed, 14 Nov 2007 19:25:27 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Mar 2008 01:01:53 GMT",
"version": "v2"
}
] | 2008-11-15 | [
[
"DeBenedictis",
"A.",
""
]
] | The possible existence of black holes has fascinated scientists at least since Michell and Laplace's proposal that a gravitating object could exist from which light could not escape. In the 20th century, in light of the general theory of relativity, it became apparent that, were such objects to exist, their structure w... |
2307.04196 | F Shojai | S. Cheraghchi, F. Shojai and M.H. Abbassi | Trans-Planckian Effect in $f(R)$ Cosmology | 21 pages, 5 figures, 1 table, | 2023 Phys. Scr. 98 085310 | 10.1088/1402-4896/ace706 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Apart from the assumption that the inflation started at an infinite time in
the past, the more realistic initial state of the quantum fluctuations is
described by a mixed quantum state imposed at a finite value of the initial
time. One of the most important non-trivial vacua is the $\alpha$-vacuum, which
is specified... | [
{
"created": "Sun, 9 Jul 2023 15:05:26 GMT",
"version": "v1"
}
] | 2023-08-02 | [
[
"Cheraghchi",
"S.",
""
],
[
"Shojai",
"F.",
""
],
[
"Abbassi",
"M. H.",
""
]
] | Apart from the assumption that the inflation started at an infinite time in the past, the more realistic initial state of the quantum fluctuations is described by a mixed quantum state imposed at a finite value of the initial time. One of the most important non-trivial vacua is the $\alpha$-vacuum, which is specified b... |
2012.03269 | Xuefeng Zhang | Bobing Ye, Xuefeng Zhang, Yanwei Ding, Yunhe Meng | Eclipse avoidance in TianQin orbit selection | 7 pages, 7 figures, to match the published version | Phys. Rev. D 103, 042007 (2021) | 10.1103/PhysRevD.103.042007 | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | In future geocentric space-based gravitational-wave observatory missions,
eclipses due to passing through the Moon's and Earth's shadows can negatively
impact the sciencecraft's thermal stability and steady power supply. The
occurrence should be reduced as much as possible in orbit design. In regard to
TianQin's circ... | [
{
"created": "Sun, 6 Dec 2020 13:46:39 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Feb 2021 02:15:58 GMT",
"version": "v2"
}
] | 2021-02-17 | [
[
"Ye",
"Bobing",
""
],
[
"Zhang",
"Xuefeng",
""
],
[
"Ding",
"Yanwei",
""
],
[
"Meng",
"Yunhe",
""
]
] | In future geocentric space-based gravitational-wave observatory missions, eclipses due to passing through the Moon's and Earth's shadows can negatively impact the sciencecraft's thermal stability and steady power supply. The occurrence should be reduced as much as possible in orbit design. In regard to TianQin's circul... |
1505.03157 | Raymond Ang\'elil | Raymond Ang\'elil, Prasenjit Saha | Geometrical vs wave optics under gravitational waves | Accepted for publication in Physical Review D, matches published
version | null | 10.1103/PhysRevD.91.124007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present some new derivations of the effect of a plane gravitational wave
on a light ray. A simple interpretation of the results is that a gravitational
wave causes a phase modulation of electromagnetic waves. We arrive at this
picture from two contrasting directions, namely null geodesics and Maxwell's
equations, ... | [
{
"created": "Tue, 12 May 2015 20:01:53 GMT",
"version": "v1"
},
{
"created": "Wed, 20 May 2015 14:28:01 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Angélil",
"Raymond",
""
],
[
"Saha",
"Prasenjit",
""
]
] | We present some new derivations of the effect of a plane gravitational wave on a light ray. A simple interpretation of the results is that a gravitational wave causes a phase modulation of electromagnetic waves. We arrive at this picture from two contrasting directions, namely null geodesics and Maxwell's equations, or... |
2401.02493 | Miquel Miravet-Ten\'es | Miquel Miravet-Ten\'es, Davide Guerra, Milton Ruiz, Pablo
Cerd\'a-Dur\'an, Jos\'e A. Font | Identifying thermal effects in neutron star merger remnants with
model-agnostic waveform reconstructions and third-generation detectors | 15 pages, 8 figures, 3 tables | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the prospects for identifying differences in simulated
gravitational-wave signals of binary neutron star (BNS) mergers associated with
the way thermal effects are incorporated in the numerical-relativity modelling.
We consider a hybrid approach in which the equation of state (EoS) comprises a
cold, zero te... | [
{
"created": "Thu, 4 Jan 2024 19:06:34 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Jan 2024 08:45:40 GMT",
"version": "v2"
}
] | 2024-01-19 | [
[
"Miravet-Tenés",
"Miquel",
""
],
[
"Guerra",
"Davide",
""
],
[
"Ruiz",
"Milton",
""
],
[
"Cerdá-Durán",
"Pablo",
""
],
[
"Font",
"José A.",
""
]
] | We explore the prospects for identifying differences in simulated gravitational-wave signals of binary neutron star (BNS) mergers associated with the way thermal effects are incorporated in the numerical-relativity modelling. We consider a hybrid approach in which the equation of state (EoS) comprises a cold, zero temp... |
1406.0841 | Vyacheslav Ivanovich Dokuchaev | E. O. Babichev, V. I. Dokuchaev and Yu. N. Eroshenko | Black holes in the presence of dark energy | 25 pages, 10 figures, review paper | Phys.-Usp. 56 (2013) 1155-1175; Uspekhi Fiz. Nauk 183 (2013)
1257-1280 | 10.3367/UFNe.0183.201312a.1257 | LPT-Orsay-14-33 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The new, rapidly developing field of theoretical research --- studies of dark
energy interacting with black holes (and, in particular, accreting onto black
holes) --- is reviewed. The term `dark energy' is meant to cover a wide range
of field theory models, as well as perfect fluids with various equations of
state, i... | [
{
"created": "Tue, 3 Jun 2014 16:02:57 GMT",
"version": "v1"
}
] | 2014-06-11 | [
[
"Babichev",
"E. O.",
""
],
[
"Dokuchaev",
"V. I.",
""
],
[
"Eroshenko",
"Yu. N.",
""
]
] | The new, rapidly developing field of theoretical research --- studies of dark energy interacting with black holes (and, in particular, accreting onto black holes) --- is reviewed. The term `dark energy' is meant to cover a wide range of field theory models, as well as perfect fluids with various equations of state, inc... |
gr-qc/9905058 | Masaru shibata | Masaru Shibata (UIUC & Osaka U.) | Fully general relativistic simulation of merging binary clusters --
Spatial gauge condition -- | 22 pages + 17 pages of figures (ps file). To be published in Prog.
Theor. Phys. 101, June (1999) | Prog.Theor.Phys. 101 (1999) 1199-1233 | 10.1143/PTP.101.1199 | null | gr-qc | null | We have carried out simulations of the coalescence between two relativistic
clusters of collisionless particles using a 3D numerical relativity code. We
have adopted a new spatial gauge condition obtained by slightly modifying the
minimum distortion gauge condition proposed by Smarr and York and resulting in
a simple... | [
{
"created": "Mon, 17 May 1999 18:29:42 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Shibata",
"Masaru",
"",
"UIUC & Osaka U."
]
] | We have carried out simulations of the coalescence between two relativistic clusters of collisionless particles using a 3D numerical relativity code. We have adopted a new spatial gauge condition obtained by slightly modifying the minimum distortion gauge condition proposed by Smarr and York and resulting in a simpler ... |
gr-qc/9304043 | Ranjeet S. Tate | Ranjeet S. Tate, (Ph.D. Dissertation, Syracuse University) | An algebraic approach to the quantization of cosntrained systems: finite
dimensional examples | 124 pages, LaTeX (run twice before printing), SU-GP-92/8-1. (Minor
corruption (extra blank line at line 2994) hopefully fixed.) | null | null | null | gr-qc | null | From the point of view of canonical quantum gravity, it has become imperative
to find a framework for quantization which provides a {\em general}
prescription to find the physical inner product, and is flexible enough to
accommodate non-canonical variables. In this dissertation I consider an
algebraic formulation of ... | [
{
"created": "Fri, 30 Apr 1993 00:41:14 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Apr 1993 18:48:37 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Tate",
"Ranjeet S.",
""
]
] | From the point of view of canonical quantum gravity, it has become imperative to find a framework for quantization which provides a {\em general} prescription to find the physical inner product, and is flexible enough to accommodate non-canonical variables. In this dissertation I consider an algebraic formulation of th... |
2007.05509 | Suvankar Paul | Suvankar Paul | Strong gravitational lensing by a strongly naked null singularity | 18 pages, 6 figures, minor corrections, matches the published version
at PRD | Phys. Rev. D 102, 064045 (2020) | 10.1103/PhysRevD.102.064045 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study strong gravitational lensing in a static, spherically symmetric,
naked singularity spacetime, without a photon sphere. The nature of the
singularity is found to be lightlike. We discuss the characteristic lensing
features of this naked singularity in the strong deflection limit. In spite of
the absence of a ... | [
{
"created": "Fri, 10 Jul 2020 17:40:12 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Jul 2020 05:32:25 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Sep 2020 14:41:54 GMT",
"version": "v3"
}
] | 2020-09-25 | [
[
"Paul",
"Suvankar",
""
]
] | We study strong gravitational lensing in a static, spherically symmetric, naked singularity spacetime, without a photon sphere. The nature of the singularity is found to be lightlike. We discuss the characteristic lensing features of this naked singularity in the strong deflection limit. In spite of the absence of a ph... |
1904.00419 | Eleni-Alexandra Kontou | P. J. Brown, C. J. Fewster and E.-A. Kontou | Classical and quantum strong energy inequalities and the Hawking
singularity theorem | 15th Marcel Grossmann conference proceedings, 6 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hawking's singularity theorem concerns matter obeying the strong energy
condition (SEC), which means that all observers experience a non-negative
effective energy density (EED). The SEC ensures the timelike convergence
property. However, for both classical and quantum fields, violations of the SEC
can be observed eve... | [
{
"created": "Sun, 31 Mar 2019 14:26:52 GMT",
"version": "v1"
}
] | 2019-04-02 | [
[
"Brown",
"P. J.",
""
],
[
"Fewster",
"C. J.",
""
],
[
"Kontou",
"E. -A.",
""
]
] | Hawking's singularity theorem concerns matter obeying the strong energy condition (SEC), which means that all observers experience a non-negative effective energy density (EED). The SEC ensures the timelike convergence property. However, for both classical and quantum fields, violations of the SEC can be observed even ... |
2004.02446 | Zahra Safari | Z. Safari (1), B. Malekolkalami (2), H. Moshafi (3) ((1) Department of
Physics, University of Kurdistan, (2) Department of Physics, University of
Kurdistan, (3) Ibn-Sina Laboratory, Shahid Beheshti University) | Cosmological constraints on dark matter particle production rate | 16 pages, 7 figures, 1 table | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational particle production has been investigated by using Einstein's
gravitational field equations in the presence of a cosmological constant. To
study the mechanism of particle creation, the Universe has been considered as a
thermodynamics system and non-equilibrium thermodynamics has been employed. In
order ... | [
{
"created": "Mon, 6 Apr 2020 07:42:50 GMT",
"version": "v1"
}
] | 2020-04-07 | [
[
"Safari",
"Z.",
""
],
[
"Malekolkalami",
"B.",
""
],
[
"Moshafi",
"H.",
""
]
] | Gravitational particle production has been investigated by using Einstein's gravitational field equations in the presence of a cosmological constant. To study the mechanism of particle creation, the Universe has been considered as a thermodynamics system and non-equilibrium thermodynamics has been employed. In order to... |
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