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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0704.2788 | Michael Ibison | M. Ibison | On the Conformal forms of the Robertson-Walker metric | Historical review added. Accepted by J. Math. Phys | J.Math.Phys.48:122501,2007 | 10.1063/1.2815811 | null | gr-qc | null | All possible transformations from the Robertson-Walker metric to those
conformal to the Lorentz-Minkowski form are derived. It is demonstrated that
the commonly known family of transformations and associated conformal factors
are not exhaustive and that there exists another relatively less well known
family of transf... | [
{
"created": "Fri, 20 Apr 2007 20:38:48 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Oct 2007 22:29:46 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Ibison",
"M.",
""
]
] | All possible transformations from the Robertson-Walker metric to those conformal to the Lorentz-Minkowski form are derived. It is demonstrated that the commonly known family of transformations and associated conformal factors are not exhaustive and that there exists another relatively less well known family of transfor... |
1811.03964 | Murli Manohar Verma Dr. | Bal Krishna Yadav and Murli Manohar Verma | Dark matter as scalaron in $f(R)$ gravity models | 6 pages, 5 figures | Journal of Cosmology and Astroparticle Physics (JCAP) 10, 052
(2019) | 10.1088/1475-7516/2019/10/052 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the scalar field obtained under the conformal transformation of
the spacetime metric $g_{\mu\nu}$ from the Jordan frame to the Einstein frame
in $f(R)$ gravity. This scalar field is the result of the modification in the
gravitational part of the Einstein's general relativistic theory of gravity.
For $f(R)=... | [
{
"created": "Thu, 8 Nov 2018 11:35:57 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Dec 2018 10:14:49 GMT",
"version": "v2"
}
] | 2019-12-25 | [
[
"Yadav",
"Bal Krishna",
""
],
[
"Verma",
"Murli Manohar",
""
]
] | We explore the scalar field obtained under the conformal transformation of the spacetime metric $g_{\mu\nu}$ from the Jordan frame to the Einstein frame in $f(R)$ gravity. This scalar field is the result of the modification in the gravitational part of the Einstein's general relativistic theory of gravity. For $f(R)=\f... |
gr-qc/0308036 | Lorenzo Iorio | Lorenzo Iorio | New proposals for the detection of the Earth's gravitomagnetic field in
space-based and laboratory-based experiments | 5 pages, no figures, no tables. Paper presented at 15th SIGRAV
Conference on General Relativity and Gravitational Physics Villa Mondragone
Monte Porzio Catone, Roma, Italy September 9-12, 2002 | I. Ciufolini, E. Coccia, M. Colpi, V. Gorini, and R. Peron (eds.),
Recent Developments in Gravitational Physics,Taylor & Francis, pp. 421-426,
2006. | null | null | gr-qc astro-ph physics.space-ph | null | In this contribution we present two new proposals for measuring the general
relativistic gravitomagnetic component of the gravitational field of the Earth.
One proposal consists of the measurement of the difference of the rates of the
perigee $\psi$ from the analysis of the laser--ranged data of two identical
Earth'a... | [
{
"created": "Tue, 12 Aug 2003 10:15:14 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Nov 2003 23:26:29 GMT",
"version": "v2"
}
] | 2007-11-12 | [
[
"Iorio",
"Lorenzo",
""
]
] | In this contribution we present two new proposals for measuring the general relativistic gravitomagnetic component of the gravitational field of the Earth. One proposal consists of the measurement of the difference of the rates of the perigee $\psi$ from the analysis of the laser--ranged data of two identical Earth'art... |
2208.03372 | Maximiliano Isi | Maximiliano Isi | Parametrizing gravitational-wave polarizations | 22 pages, 18 figures (plus one appendix); journal version (displays
physical effect of beyond-GR polarizations in new Fig. 18) | Class. Quantum Grav. 40 203001 (2023) | 10.1088/1361-6382/acf28c | LIGO-P2200221 | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We review the formalism underlying the modeling of gravitational wave (GW)
polarizations, and the coordinate frames used to define them. In the process,
we clarify the notion of "polarization angle" and identify three conceptually
distinct definitions. We describe how those are related and how they arise in
the pract... | [
{
"created": "Fri, 5 Aug 2022 19:57:39 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Sep 2023 18:15:51 GMT",
"version": "v2"
}
] | 2023-09-28 | [
[
"Isi",
"Maximiliano",
""
]
] | We review the formalism underlying the modeling of gravitational wave (GW) polarizations, and the coordinate frames used to define them. In the process, we clarify the notion of "polarization angle" and identify three conceptually distinct definitions. We describe how those are related and how they arise in the practic... |
2404.04951 | Federico Manzoni | Federico Manzoni | Axialgravisolitons at infinite corners | null | Class. Quantum Grav. 41 177001 (2024) | 10.1088/1361-6382/ad61b5 | null | gr-qc math-ph math.MP nlin.SI | http://creativecommons.org/licenses/by/4.0/ | Gravitational solitons (gravisolitons) are particular exact solutions of
Einstein field equation in vacuum build on a given background solution. Their
interpretation is not yet fully clear but they contain many of the physically
relevant solutions low $N$-solitons solutions. However, a systematic study and
characteri... | [
{
"created": "Sun, 7 Apr 2024 13:07:54 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Aug 2024 16:40:18 GMT",
"version": "v2"
}
] | 2024-08-05 | [
[
"Manzoni",
"Federico",
""
]
] | Gravitational solitons (gravisolitons) are particular exact solutions of Einstein field equation in vacuum build on a given background solution. Their interpretation is not yet fully clear but they contain many of the physically relevant solutions low $N$-solitons solutions. However, a systematic study and characteriza... |
0802.2151 | Jan Schlemmer | Jan Schlemmer, Rainer Verch | Local Thermal Equilibrium States and Quantum Energy Inequalities | 26 pages | AnnalesHenriPoincare9:945-978,2008 | 10.1007/s00023-008-0380-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we investigate the energy distribution of states of a linear
scalar quantum field with arbitrary curvature coupling on a curved spacetime
which fulfill some local thermality condition. We find that this condition
implies a quantum energy inequality for these states, where the (lower) energy
bounds depen... | [
{
"created": "Fri, 15 Feb 2008 08:42:52 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Schlemmer",
"Jan",
""
],
[
"Verch",
"Rainer",
""
]
] | In this paper we investigate the energy distribution of states of a linear scalar quantum field with arbitrary curvature coupling on a curved spacetime which fulfill some local thermality condition. We find that this condition implies a quantum energy inequality for these states, where the (lower) energy bounds depend ... |
gr-qc/9909058 | Kostas Kokkotas | Kostas D. Kokkotas and Bernd G. Schmidt | Quasi-Normal Modes of Stars and Black Holes | 74 pages, 7 figures, Review article for "Living Reviews in
Relativity" | LivingRev.Rel.2:2,1999 | 10.12942/lrr-1999-2 | null | gr-qc astro-ph | null | Perturbations of stars and black holes have been one of the main topics of
relativistic astrophysics for the last few decades. They are of particular
importance today, because of their relevance to gravitational wave astronomy.
In this review we present the theory of quasi-normal modes of compact objects
from both th... | [
{
"created": "Mon, 20 Sep 1999 14:43:09 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Kokkotas",
"Kostas D.",
""
],
[
"Schmidt",
"Bernd G.",
""
]
] | Perturbations of stars and black holes have been one of the main topics of relativistic astrophysics for the last few decades. They are of particular importance today, because of their relevance to gravitational wave astronomy. In this review we present the theory of quasi-normal modes of compact objects from both the ... |
gr-qc/9510043 | Toshiharu Samura | Koichi Hayashi and Toshiharu Samura | Newman-Penrose Formalism for Gravitational Shock Waves | Latex 10 pages | Mod.Phys.Lett. A11 (1996) 1023-1030 | 10.1142/S0217732396001053 | null | gr-qc | null | First order perturbations for the fields with spin on the background metric
of the gravitational shock waves are discussed. Applying the Newman -- Penrose
formalism, exact solutions of the perturbation equations are obtained. For
particle physics, this would be one approach to the problem of scattering
paticle at Pla... | [
{
"created": "Mon, 23 Oct 1995 17:33:14 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Hayashi",
"Koichi",
""
],
[
"Samura",
"Toshiharu",
""
]
] | First order perturbations for the fields with spin on the background metric of the gravitational shock waves are discussed. Applying the Newman -- Penrose formalism, exact solutions of the perturbation equations are obtained. For particle physics, this would be one approach to the problem of scattering paticle at Planc... |
2406.19658 | Rubens R. S. Oliveira | R. R. S. Oliveira | Comment on "Light deflection with torsion effects caused by a spinning
cosmic string" | Comment on arXiv:1605.02781 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this comment, we showed that the line element ("metric'') worked by Jusufi
(Eur. Phys. J. C 76: 332, 2016) is incorrect since he worked with a spinning
cosmic string with torsion in $(2+1)$-dimensions (and in polar coordinates),
which cannot happen. Indeed, as in $(2+1)$-dimensions there are no screw
dislocations ... | [
{
"created": "Fri, 28 Jun 2024 05:01:19 GMT",
"version": "v1"
}
] | 2024-07-01 | [
[
"Oliveira",
"R. R. S.",
""
]
] | In this comment, we showed that the line element ("metric'') worked by Jusufi (Eur. Phys. J. C 76: 332, 2016) is incorrect since he worked with a spinning cosmic string with torsion in $(2+1)$-dimensions (and in polar coordinates), which cannot happen. Indeed, as in $(2+1)$-dimensions there are no screw dislocations or... |
2210.01873 | Saif Ali | Saif Ali, Evangelos Stoikos, Evan Meade, Michael Kesden, Lindsay King | Detectability of strongly lensed gravitational waves using
model-independent image parameters | 11 pages, 8 figures, submitted to PRD | null | 10.1103/PhysRevD.107.103023 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Strong gravitational lensing of gravitational waves (GWs) occurs when the GWs
from a compact binary system travel near a massive object. The mismatch between
a lensed signal and unlensed templates determines whether lensing can be
identified in a particular GW event. For axisymmetric lens models, the lensed
signal is... | [
{
"created": "Tue, 4 Oct 2022 19:46:42 GMT",
"version": "v1"
}
] | 2023-05-24 | [
[
"Ali",
"Saif",
""
],
[
"Stoikos",
"Evangelos",
""
],
[
"Meade",
"Evan",
""
],
[
"Kesden",
"Michael",
""
],
[
"King",
"Lindsay",
""
]
] | Strong gravitational lensing of gravitational waves (GWs) occurs when the GWs from a compact binary system travel near a massive object. The mismatch between a lensed signal and unlensed templates determines whether lensing can be identified in a particular GW event. For axisymmetric lens models, the lensed signal is t... |
2305.04761 | Dixeena Lopez | Dixeena Lopez, Shubhanshu Tiwari and Michael Ebersold | Gravitational wave memory of compact binary coalescence in the presence
of matter effects | null | Phys. Rev. D 109, 043039 (2024) | 10.1103/PhysRevD.109.043039 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Binary neutron stars (BNSs) and neutron star--black hole (NSBH) binaries are
two of the most promising gravitational wave (GW) sources to probe matter
effects. Upcoming observing runs of LIGO-Virgo-KAGRA detectors and future third
generation detectors like Einstein Telescope and Cosmic Explorer will allow the
extract... | [
{
"created": "Mon, 8 May 2023 15:11:21 GMT",
"version": "v1"
},
{
"created": "Tue, 9 May 2023 16:08:54 GMT",
"version": "v2"
},
{
"created": "Wed, 6 Mar 2024 06:29:04 GMT",
"version": "v3"
}
] | 2024-03-07 | [
[
"Lopez",
"Dixeena",
""
],
[
"Tiwari",
"Shubhanshu",
""
],
[
"Ebersold",
"Michael",
""
]
] | Binary neutron stars (BNSs) and neutron star--black hole (NSBH) binaries are two of the most promising gravitational wave (GW) sources to probe matter effects. Upcoming observing runs of LIGO-Virgo-KAGRA detectors and future third generation detectors like Einstein Telescope and Cosmic Explorer will allow the extractio... |
1603.03443 | Ali Kaya | Ali Kaya | Remarks on inhomogeneous anisotropic cosmology | 6 pages, 2 figures, v4: comments and a figure added, title is
modified, to appear in Phys. Rev. D | Phys. Rev. D 94, 043509 (2016) | 10.1103/PhysRevD.94.043509 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently a new no-global-recollapse argument was given for some inhomogeneous
and anisotropic cosmologies that utilizes surface deformation by the mean
curvature flow. In this paper we discuss important properties of the mean
curvature flow of spacelike surfaces in Lorentzian manifolds. We show that
singularities may... | [
{
"created": "Thu, 10 Mar 2016 21:00:58 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Mar 2016 11:59:05 GMT",
"version": "v2"
},
{
"created": "Thu, 16 Jun 2016 14:10:25 GMT",
"version": "v3"
},
{
"created": "Sat, 6 Aug 2016 12:01:51 GMT",
"version": "v4"
}
] | 2016-08-17 | [
[
"Kaya",
"Ali",
""
]
] | Recently a new no-global-recollapse argument was given for some inhomogeneous and anisotropic cosmologies that utilizes surface deformation by the mean curvature flow. In this paper we discuss important properties of the mean curvature flow of spacelike surfaces in Lorentzian manifolds. We show that singularities may f... |
1101.3636 | Naonori Sugiyama | Naonori S. Sugiyama and Eiichiro Komatsu and Toshifumi Futamase | Non-Gaussianity Consistency Relation for Multi-field Inflation | 5 pages. Accepted for publication in Physical Review Letters | Phys.Rev.Lett.106:251301,2011 | 10.1103/PhysRevLett.106.251301 | TCC-040-10 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While detection of the "local form" bispectrum of primordial perturbations
would rule out all single-field inflation models, multi-field models would
still be allowed. We show that multi-field models described by the $\delta N$
formalism obey an inequality between $f_{\rm NL}$ and one of the local-form
{\it trispectr... | [
{
"created": "Wed, 19 Jan 2011 08:00:46 GMT",
"version": "v1"
},
{
"created": "Wed, 25 May 2011 02:02:10 GMT",
"version": "v2"
}
] | 2011-07-28 | [
[
"Sugiyama",
"Naonori S.",
""
],
[
"Komatsu",
"Eiichiro",
""
],
[
"Futamase",
"Toshifumi",
""
]
] | While detection of the "local form" bispectrum of primordial perturbations would rule out all single-field inflation models, multi-field models would still be allowed. We show that multi-field models described by the $\delta N$ formalism obey an inequality between $f_{\rm NL}$ and one of the local-form {\it trispectrum... |
1108.3065 | Koji Uryu | Koji Uryu and Antonios Tsokaros | A new code for equilibriums and quasiequilibrium initial data of compact
objects | Revised version with a new title, 29 pages | null | 10.1103/PhysRevD.85.064014 | DPUR-TH-26 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new code, named COCAL - Compact Object CALculator, for the
computation of equilibriums and quasiequilibrium initial data sets of single or
binary compact objects of all kinds. In the cocal code, those solutions are
calculated on one or multiple spherical coordinate patches covering the initial
hypersurfa... | [
{
"created": "Mon, 15 Aug 2011 19:26:06 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Oct 2011 08:13:30 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Uryu",
"Koji",
""
],
[
"Tsokaros",
"Antonios",
""
]
] | We present a new code, named COCAL - Compact Object CALculator, for the computation of equilibriums and quasiequilibrium initial data sets of single or binary compact objects of all kinds. In the cocal code, those solutions are calculated on one or multiple spherical coordinate patches covering the initial hypersurface... |
0909.0650 | Daniel A. Shaddock | Daniel A. Shaddock | An overview of the Laser Interferometer Space Antenna | 6 pages, 3 figures, conference paper | Publ.Astron.Soc.Austral.26:128-132,2009 | 10.1071/AS08059 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Laser Interferometer Space Antenna will detect gravitational waves with
frequencies from 0.1 mHz to 1 Hz. This article provides a brief overview of
LISA's science goals followed by a tutorial of the LISA measurement concept.
| [
{
"created": "Thu, 3 Sep 2009 13:43:28 GMT",
"version": "v1"
}
] | 2010-03-25 | [
[
"Shaddock",
"Daniel A.",
""
]
] | The Laser Interferometer Space Antenna will detect gravitational waves with frequencies from 0.1 mHz to 1 Hz. This article provides a brief overview of LISA's science goals followed by a tutorial of the LISA measurement concept. |
1604.01395 | Muhammad Zaeem Ul Haq Bhatti | M. Zaeem Ul Haq Bhatti and Z. Yousaf | Influence of Electric Charge and Modified Gravity on Density
Irregularities | 28 pages, no figure, version accepted for publication in European
Physical Journal C | Eur. Phys. J. C 76, 219 (2016) | 10.1140/epjc/s10052-016-4064-2 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work aims to identify some inhomogeneity factors for plane symmetric
topology with anisotropic and dissipative fluid under the effects of both
electromagnetic field as well as Palatini $f(R)$ gravity. We construct the
modified field equations, kinematical quantities and mass function to continue
our analysis. We... | [
{
"created": "Tue, 5 Apr 2016 14:56:30 GMT",
"version": "v1"
}
] | 2016-05-12 | [
[
"Bhatti",
"M. Zaeem Ul Haq",
""
],
[
"Yousaf",
"Z.",
""
]
] | This work aims to identify some inhomogeneity factors for plane symmetric topology with anisotropic and dissipative fluid under the effects of both electromagnetic field as well as Palatini $f(R)$ gravity. We construct the modified field equations, kinematical quantities and mass function to continue our analysis. We h... |
1503.02150 | Ivan Arraut | Ivan Arraut | Path-integral derivation of black-hole radiance inside the
de-Rham-Gabadadze-Tolley formulation of massive gravity | Published version, 20 pages | Eur. Phys. J. C (2017) 77: 501 | 10.1140/epjc/s10052-017-5072-6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | If we apply the path integral formulation in order to analyze the particle
creation process of black-holes inside the non-linear formulation of massive
gravity, it is possible to demonstrate that the effect of the extra-degrees of
freedom is to deform the periodicity of the poles of the propagator in the
complex $t$-... | [
{
"created": "Sat, 7 Mar 2015 09:29:13 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Aug 2017 09:56:30 GMT",
"version": "v2"
}
] | 2017-08-04 | [
[
"Arraut",
"Ivan",
""
]
] | If we apply the path integral formulation in order to analyze the particle creation process of black-holes inside the non-linear formulation of massive gravity, it is possible to demonstrate that the effect of the extra-degrees of freedom is to deform the periodicity of the poles of the propagator in the complex $t$-pl... |
2212.04094 | Asuka Ito | Asuka Ito, Jiro Soda | Exploring High Frequency Gravitational Waves with Magnons | 14 pages, 2 figures | Eur.Phys.J.C 83 (2023) 8, 766 | 10.1140/epjc/s10052-023-11876-2 | KEK-QUP-2022-0018, KEK-TH-2477, KEK-Cosmo-0304, KOBE-COSMO-22-19 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Detecting gravitational waves with frequencies higher than 10 kHz requires
new strategies. In previous papers, we proposed magnon gravitational wave
detectors and gave the first limit on GHz gravitational waves by reinterpreting
the existing data from axion dark matter experiments. In this paper, we show
that the sen... | [
{
"created": "Thu, 8 Dec 2022 06:10:07 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Sep 2023 12:08:34 GMT",
"version": "v2"
}
] | 2023-09-07 | [
[
"Ito",
"Asuka",
""
],
[
"Soda",
"Jiro",
""
]
] | Detecting gravitational waves with frequencies higher than 10 kHz requires new strategies. In previous papers, we proposed magnon gravitational wave detectors and gave the first limit on GHz gravitational waves by reinterpreting the existing data from axion dark matter experiments. In this paper, we show that the sensi... |
1811.07790 | Vasilis Oikonomou | S. Nojiri, S.D. Odintsov, V.K. Oikonomou | Ghost-free Gauss-Bonnet Theories of Gravity | PRD Accepted | Phys. Rev. D 99, 044050 (2019) | 10.1103/PhysRevD.99.044050 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we develop a theoretical framework for Gauss-Bonnet modified
gravity theories, in which ghost modes can be eliminated at the equations of
motion level. Particularly, after we present how the ghosts can occur at the
level of equations of motion, we employ the Lagrange multipliers technique, and
by means o... | [
{
"created": "Mon, 19 Nov 2018 16:39:12 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Feb 2019 19:27:24 GMT",
"version": "v2"
}
] | 2019-03-06 | [
[
"Nojiri",
"S.",
""
],
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | In this work we develop a theoretical framework for Gauss-Bonnet modified gravity theories, in which ghost modes can be eliminated at the equations of motion level. Particularly, after we present how the ghosts can occur at the level of equations of motion, we employ the Lagrange multipliers technique, and by means of ... |
1803.09078 | Piyabut Burikham | Supakchai Ponglertsakul, Piyabut Burikham, Lunchakorn Tannukij | Quasinormal modes of black strings in de Rham-Gabadadze-Tolley massive
gravity | 22 pages,8 figures,8 tables | Eur.Phys.J. C78 (2018) no.7, 584 | 10.1140/epjc/s10052-018-6057-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effect of massive scalar perturbations on neutral black string in de
Rham-Gabadadze-Tolley (dRGT) massive gravity is investigated through the study
of the quasi-normal modes~(QNMs). Due to the similarity between the equation of
motion of the field in the black-string and black-hole background, similar
numerical a... | [
{
"created": "Sat, 24 Mar 2018 08:59:19 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Aug 2018 12:46:58 GMT",
"version": "v2"
}
] | 2018-08-15 | [
[
"Ponglertsakul",
"Supakchai",
""
],
[
"Burikham",
"Piyabut",
""
],
[
"Tannukij",
"Lunchakorn",
""
]
] | The effect of massive scalar perturbations on neutral black string in de Rham-Gabadadze-Tolley (dRGT) massive gravity is investigated through the study of the quasi-normal modes~(QNMs). Due to the similarity between the equation of motion of the field in the black-string and black-hole background, similar numerical and... |
1105.5212 | Yasusada Nambu | Yasusada Nambu and Yuji Ohsumi | Classical and Quantum Correlations of Scalar Field in the Inflationary
Universe | 21 pages, accepted for publication in Phys. Rev. D | Phys.Rev.D84:044028,2011 | 10.1103/PhysRevD.84.044028 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate classical and quantum correlations of a quantum field in the
inflationary universe using a particle detector model. By considering the
entanglement and correlations between two comoving detectors interacting with a
scalar field, we find that the entanglement between the detectors becomes zero
after the... | [
{
"created": "Thu, 26 May 2011 06:20:03 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Aug 2011 04:37:58 GMT",
"version": "v2"
}
] | 2011-09-08 | [
[
"Nambu",
"Yasusada",
""
],
[
"Ohsumi",
"Yuji",
""
]
] | We investigate classical and quantum correlations of a quantum field in the inflationary universe using a particle detector model. By considering the entanglement and correlations between two comoving detectors interacting with a scalar field, we find that the entanglement between the detectors becomes zero after their... |
gr-qc/9606071 | Alexander L. Gromov | Alexander Gromov (St-Petersburg State Thechnical University, Russia) | The Simplest Exact Solutions in the LTB Model | LaTeX,10 pages,Invited talk at the Cosmion'96 Int. Conf. 1996;
submitted to Gravitation and Astrophysics | null | null | IRB-StP-GR-240696 | gr-qc | null | The rules of calculating three undetermined functions which defined a
solution in the LTB model are used to study the class of exact nonhomogene\-ous
models with $f^2(\mu) = 1$, $\Lambda = 0$. The parameter $\nu(\mu)$ defined the
difference between LTB and FRW models is found out and the limit transformation
to the F... | [
{
"created": "Mon, 24 Jun 1996 15:23:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gromov",
"Alexander",
"",
"St-Petersburg State Thechnical University, Russia"
]
] | The rules of calculating three undetermined functions which defined a solution in the LTB model are used to study the class of exact nonhomogene\-ous models with $f^2(\mu) = 1$, $\Lambda = 0$. The parameter $\nu(\mu)$ defined the difference between LTB and FRW models is found out and the limit transformation to the FRW... |
2210.00909 | S. M. M. Rasouli | S. M. M. Rasouli, E.W. Oliveira Costa, P. V. Moniz and S. Jalalzadeh | Inflation and fractional quantum cosmology | 13 pages | Fractal Fract. 2022, 6, 655 | 10.3390/fractalfract6110655 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Wheeler--DeWitt equation for a flat and compact
Friedmann--Lema\^{i}tre--Robertson--Walker cosmology at the pre-inflation epoch
is studied in the contexts of the standard and fractional quantum cosmology.
Working within the semiclassical regime and applying the WKB approximation, we
show that some fascinating con... | [
{
"created": "Fri, 30 Sep 2022 03:12:29 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Apr 2023 19:43:13 GMT",
"version": "v2"
}
] | 2023-04-17 | [
[
"Rasouli",
"S. M. M.",
""
],
[
"Costa",
"E. W. Oliveira",
""
],
[
"Moniz",
"P. V.",
""
],
[
"Jalalzadeh",
"S.",
""
]
] | The Wheeler--DeWitt equation for a flat and compact Friedmann--Lema\^{i}tre--Robertson--Walker cosmology at the pre-inflation epoch is studied in the contexts of the standard and fractional quantum cosmology. Working within the semiclassical regime and applying the WKB approximation, we show that some fascinating conse... |
1506.03545 | Mar\'ia Montserrat Ju\'arez-Aubry | Eloy Ay\'on-Beato, Mokhtar Hassa\"ine and Mar\'ia Montserrat
Ju\'arez-Aubry | Stealths on Anisotropic Holographic Backgrounds | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we are interested in exploring the existence of stealth
configurations on anisotropic backgrounds playing a prominent role in the
non-relativistic version of the gauge/gravity correspondence. By stealth
configuration, we mean a nontrivial scalar field nonminimally coupled to
gravity whose energy-moment... | [
{
"created": "Thu, 11 Jun 2015 04:49:13 GMT",
"version": "v1"
}
] | 2015-06-15 | [
[
"Ayón-Beato",
"Eloy",
""
],
[
"Hassaïne",
"Mokhtar",
""
],
[
"Juárez-Aubry",
"María Montserrat",
""
]
] | In this paper, we are interested in exploring the existence of stealth configurations on anisotropic backgrounds playing a prominent role in the non-relativistic version of the gauge/gravity correspondence. By stealth configuration, we mean a nontrivial scalar field nonminimally coupled to gravity whose energy-momentum... |
2311.11972 | \"Ozcan Sert | Beyda Doyran, \"Ozcan Sert, Muzaffer Adak | The non-minimally coupled symmetric teleparallel gravity with
electromagnetic field | 16 pages | Phys. Scr. 99 (2024) 085041 | 10.1088/1402-4896/ad63d5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a symmetric teleparallel gravity model which is non-minimally
coupled with electromagnetic field in four dimensions inspired by its
Riemannian equivalent. We derive the field equations by taking the variation of
this model, which is written here for the first time. Then, we find some
classes of spherical... | [
{
"created": "Mon, 20 Nov 2023 18:00:53 GMT",
"version": "v1"
}
] | 2024-08-05 | [
[
"Doyran",
"Beyda",
""
],
[
"Sert",
"Özcan",
""
],
[
"Adak",
"Muzaffer",
""
]
] | We construct a symmetric teleparallel gravity model which is non-minimally coupled with electromagnetic field in four dimensions inspired by its Riemannian equivalent. We derive the field equations by taking the variation of this model, which is written here for the first time. Then, we find some classes of spherically... |
1202.6204 | Kourosh Nozari | Kourosh Nozari, M. Khamesian and N. Rashidi | Cosmological braneworld solutions with bulk scalar field in DGP setup | 29 pages, 12 figs, accepted for publication in Astroparticle Physics | Astroparticle Phys. 35 (2012) 828 | 10.1016/j.astropartphys.2012.02.012 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study cosmological dynamics of a canonical bulk scalar field in the DGP
setup within a superpotential approach. We show that the normal branch of this
DGP-inspired model realizes a late-time de Sitter expansion on the brane. We
extend this study to the case that the bulk contains a phantom scalar field.
Our detail... | [
{
"created": "Tue, 28 Feb 2012 13:09:22 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Nozari",
"Kourosh",
""
],
[
"Khamesian",
"M.",
""
],
[
"Rashidi",
"N.",
""
]
] | We study cosmological dynamics of a canonical bulk scalar field in the DGP setup within a superpotential approach. We show that the normal branch of this DGP-inspired model realizes a late-time de Sitter expansion on the brane. We extend this study to the case that the bulk contains a phantom scalar field. Our detailed... |
0910.5303 | Norihiro Tanahashi | Norihiro Tanahashi and Takahiro Tanaka | Floating Black Hole in the Karch-Randall Model and its Holographic Dual | 24 pages, 11 figures | Prog.Theor.Phys.123:369-392,2010 | 10.1143/PTP.123.369 | KUNS-2238 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To investigate the holography in the Karch-Randall (KR) braneworld model, we
construct time-symmetric initial data of black holes floating in the bulk, and
compare it with its holographic dual, which is described by four-dimensional
self-gravitating quantum field theory in asymptotically AdS_4 spacetime. We
also give... | [
{
"created": "Wed, 28 Oct 2009 14:42:45 GMT",
"version": "v1"
}
] | 2010-04-28 | [
[
"Tanahashi",
"Norihiro",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | To investigate the holography in the Karch-Randall (KR) braneworld model, we construct time-symmetric initial data of black holes floating in the bulk, and compare it with its holographic dual, which is described by four-dimensional self-gravitating quantum field theory in asymptotically AdS_4 spacetime. We also give a... |
2012.03585 | Valerio De Luca | K. Kritos, V. De Luca, G. Franciolini, A. Kehagias, A. Riotto | The Astro-Primordial Black Hole Merger Rates: a Reappraisal | 24 pages, 4 figures. v2: matching published version | null | 10.1088/1475-7516/2021/05/039 | null | gr-qc astro-ph.CO astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Mainly motivated by the recent GW190521 mass gap event which we take as a
benchmark point, we critically assess if binaries made of a primordial black
hole and a black hole of astrophysical origin may form, merge in stellar
clusters and reproduce the LIGO/Virgo detection rate. While two previously
studied mechanisms ... | [
{
"created": "Mon, 7 Dec 2020 11:02:15 GMT",
"version": "v1"
},
{
"created": "Thu, 20 May 2021 07:48:36 GMT",
"version": "v2"
}
] | 2021-05-26 | [
[
"Kritos",
"K.",
""
],
[
"De Luca",
"V.",
""
],
[
"Franciolini",
"G.",
""
],
[
"Kehagias",
"A.",
""
],
[
"Riotto",
"A.",
""
]
] | Mainly motivated by the recent GW190521 mass gap event which we take as a benchmark point, we critically assess if binaries made of a primordial black hole and a black hole of astrophysical origin may form, merge in stellar clusters and reproduce the LIGO/Virgo detection rate. While two previously studied mechanisms --... |
1701.03192 | Joseph Sultana Dr. | Joseph Sultana, Demosthenes Kazanas | Gauge Choice in Conformal Gravity | 4 pages | null | 10.1093/mnras/stx061 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent paper (MNRAS 458, 4122 (2016)) K. Horne examined the effect of a
conformally coupled scalar field (referred to as Higgs field) on the
Mannheim-Kazanas metric $g_{\mu\nu}$, i.e. the static spherically symmetric
metric within the context of conformal gravity (CG), and studied its effect on
the rotation curv... | [
{
"created": "Thu, 12 Jan 2017 00:14:21 GMT",
"version": "v1"
}
] | 2017-01-13 | [
[
"Sultana",
"Joseph",
""
],
[
"Kazanas",
"Demosthenes",
""
]
] | In a recent paper (MNRAS 458, 4122 (2016)) K. Horne examined the effect of a conformally coupled scalar field (referred to as Higgs field) on the Mannheim-Kazanas metric $g_{\mu\nu}$, i.e. the static spherically symmetric metric within the context of conformal gravity (CG), and studied its effect on the rotation curves... |
0812.1827 | L. Arturo Urena-Lopez | Gabriela Caldera-Cabral, Roy Maartens, L. Arturo Urena-Lopez | Dynamics of interacting dark energy | 11 pages, 5 color figures, revtex; matches version published in PRD | Phys.Rev.D79:063518,2009 | 10.1103/PhysRevD.79.063518 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dark energy and dark matter are only indirectly measured via their
gravitational effects. It is possible that there is an exchange of energy
within the dark sector, and this offers an interesting alternative approach to
the coincidence problem. We consider two broad classes of interacting models
where the energy exch... | [
{
"created": "Wed, 10 Dec 2008 09:55:03 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Mar 2009 15:05:00 GMT",
"version": "v2"
}
] | 2009-03-24 | [
[
"Caldera-Cabral",
"Gabriela",
""
],
[
"Maartens",
"Roy",
""
],
[
"Urena-Lopez",
"L. Arturo",
""
]
] | Dark energy and dark matter are only indirectly measured via their gravitational effects. It is possible that there is an exchange of energy within the dark sector, and this offers an interesting alternative approach to the coincidence problem. We consider two broad classes of interacting models where the energy exchan... |
1408.2778 | Jose M. M. Senovilla | Jos\'e M. M. Senovilla | Black hole formation by incoming electromagnetic radiation | 8 pages, 3 figures. Minor corrections, better figures, reference
added | null | 10.1088/0264-9381/32/1/017001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I revisit a known solution of the Einstein field equations to show that it
describes the formation of non-spherical black holes by the collapse of pure
electromagnetic monochromatic radiation. Both positive and negative masses are
feasible without ever violating the dominant energy condition. The solution can
also be... | [
{
"created": "Tue, 12 Aug 2014 17:06:37 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Aug 2014 17:03:37 GMT",
"version": "v2"
}
] | 2015-06-22 | [
[
"Senovilla",
"José M. M.",
""
]
] | I revisit a known solution of the Einstein field equations to show that it describes the formation of non-spherical black holes by the collapse of pure electromagnetic monochromatic radiation. Both positive and negative masses are feasible without ever violating the dominant energy condition. The solution can also be u... |
gr-qc/9912103 | Shinji Mukohyama | Shinji Mukohyama | Aspects of black hole entropy | Latex, 7 pages, Presented at 9th Workshop on General Relativity and
Gravitation, Hiroshima, Japan, Nov 3-6, 1999 | null | null | null | gr-qc | null | There have been many attempts to understand the statistical origin of
black-hole entropy. Among them, entanglement entropy and the brick wall model
are strong candidates. In this paper, first, we show that the entanglement
approach reduces to the brick wall model when we seek the maximal entanglement
entropy. After t... | [
{
"created": "Fri, 24 Dec 1999 20:44:08 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mukohyama",
"Shinji",
""
]
] | There have been many attempts to understand the statistical origin of black-hole entropy. Among them, entanglement entropy and the brick wall model are strong candidates. In this paper, first, we show that the entanglement approach reduces to the brick wall model when we seek the maximal entanglement entropy. After tha... |
2301.06373 | Misba Afrin | Arshia Anjum, Misba Afrin and Sushant G. Ghosh | Investigating effects of dark matter on photon orbits and black hole
shadows | 17 pages, 16 figures, 6 tables. Matched to the published version | Phys. Dark Universe 40, 101195 (2023) | 10.1016/j.dark.2023.101195 | null | gr-qc astro-ph.GA hep-th | http://creativecommons.org/licenses/by/4.0/ | We consider Kerr black holes (BHs) surrounded by perfect dark fluid matter
(PFDM), with an additional parameter ($k$) because of PFDM, apart from mass
($M$) and rotation parameter ($a$) -- the rotating PFDM BHs. We analyze the
photon orbits around PFDM BHs and naked singularities (NSs) and emphasise the
effect of PFD... | [
{
"created": "Mon, 16 Jan 2023 11:37:56 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Feb 2023 05:01:06 GMT",
"version": "v2"
},
{
"created": "Tue, 21 Feb 2023 06:52:38 GMT",
"version": "v3"
}
] | 2023-02-22 | [
[
"Anjum",
"Arshia",
""
],
[
"Afrin",
"Misba",
""
],
[
"Ghosh",
"Sushant G.",
""
]
] | We consider Kerr black holes (BHs) surrounded by perfect dark fluid matter (PFDM), with an additional parameter ($k$) because of PFDM, apart from mass ($M$) and rotation parameter ($a$) -- the rotating PFDM BHs. We analyze the photon orbits around PFDM BHs and naked singularities (NSs) and emphasise the effect of PFDM ... |
1711.01865 | Ali \"Ovg\"un Dr. | P. A. Gonz\'alez, Ali \"Ovg\"un, Joel Saavedra and Yerko V\'asquez | Hawking radiation and propagation of massive charged scalar field on a
three-dimensional G\"{o}del black hole | 18 pages, 12 figures. Accepted for publication in General Relativity
and Gravitation | Gen Relativ Gravit (2018) 50: 62 | 10.1007/s10714-018-2389-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider the three-dimensional G\"{o}del black hole as a
background and we study the vector particle tunneling from this background in
order to obtain the Hawking temperature. Then, we study the propagation of a
massive charged scalar field and we find the quasinormal modes analytically,
which turns ... | [
{
"created": "Mon, 6 Nov 2017 12:47:49 GMT",
"version": "v1"
},
{
"created": "Thu, 10 May 2018 16:21:02 GMT",
"version": "v2"
}
] | 2018-05-22 | [
[
"González",
"P. A.",
""
],
[
"Övgün",
"Ali",
""
],
[
"Saavedra",
"Joel",
""
],
[
"Vásquez",
"Yerko",
""
]
] | In this paper we consider the three-dimensional G\"{o}del black hole as a background and we study the vector particle tunneling from this background in order to obtain the Hawking temperature. Then, we study the propagation of a massive charged scalar field and we find the quasinormal modes analytically, which turns ou... |
2306.04863 | Hong Wang | Hong Wang and Jin Wang | Quantum master equation for the vacuum decay dynamics | 34 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quantum master equation required to describe the dynamics of
gravity-related vacuum decay is still challenging. We aim to study this issue.
Our model consists of the spacetime and scalar field with self-interaction
potential. The environment is chosen as spacetime while the system is formed by
the vacua of the sc... | [
{
"created": "Thu, 8 Jun 2023 01:29:36 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Sep 2023 07:05:33 GMT",
"version": "v2"
}
] | 2023-10-03 | [
[
"Wang",
"Hong",
""
],
[
"Wang",
"Jin",
""
]
] | The quantum master equation required to describe the dynamics of gravity-related vacuum decay is still challenging. We aim to study this issue. Our model consists of the spacetime and scalar field with self-interaction potential. The environment is chosen as spacetime while the system is formed by the vacua of the scal... |
1902.04232 | Matt Visser | Alex Simpson (Victoria University of Wellington), Prado Martin-Moruno
(Universidad Complutense de Madrid), and Matt Visser (Victoria University of
Wellington) | Vaidya spacetimes, black-bounces, and traversable wormholes | V1: 27 pages; 5 Carter-Penrose diagrams. V2: Two references added.
V3: 29 pages; closely matches published version | Classical and Quantum Gravity 36 # 14 (2019) 145007 | 10.1088/1361-6382/ab28a5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a non-static evolving version of the regular
"black-bounce"/traversable wormhole geometry recently introduced in
JCAP02(2019)042 [arXiv:1812.07114 [gr-qc]]. We first re-write the static metric
using Eddington-Finkelstein coordinates, and then allow the mass parameter $m$
to depend on the null time coordin... | [
{
"created": "Tue, 12 Feb 2019 04:07:03 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Feb 2019 09:57:29 GMT",
"version": "v2"
},
{
"created": "Wed, 26 Jun 2019 03:07:12 GMT",
"version": "v3"
}
] | 2019-06-27 | [
[
"Simpson",
"Alex",
"",
"Victoria University of Wellington"
],
[
"Martin-Moruno",
"Prado",
"",
"Universidad Complutense de Madrid"
],
[
"Visser",
"Matt",
"",
"Victoria University of\n Wellington"
]
] | We consider a non-static evolving version of the regular "black-bounce"/traversable wormhole geometry recently introduced in JCAP02(2019)042 [arXiv:1812.07114 [gr-qc]]. We first re-write the static metric using Eddington-Finkelstein coordinates, and then allow the mass parameter $m$ to depend on the null time coordinat... |
2101.08324 | Martin Lesourd Mr | Martin Lesourd | Observations and predictions from past lightcones | Comments are welcome! | null | 10.1088/1361-6382/abfaec | null | gr-qc math.DG | http://creativecommons.org/publicdomain/zero/1.0/ | In a general Lorentzian manifold M, the past lightcone of a point is a proper
subset of M that does not carry enough information to determine the rest of M.
That said, if M is a globally hyperbolic Cauchy development of vacuum initial
data on a Cauchy surface S and there is a point whose past lightcone contains
S, th... | [
{
"created": "Wed, 20 Jan 2021 21:18:30 GMT",
"version": "v1"
}
] | 2021-06-09 | [
[
"Lesourd",
"Martin",
""
]
] | In a general Lorentzian manifold M, the past lightcone of a point is a proper subset of M that does not carry enough information to determine the rest of M. That said, if M is a globally hyperbolic Cauchy development of vacuum initial data on a Cauchy surface S and there is a point whose past lightcone contains S, then... |
1902.10469 | Gerard Hooft 't | Gerard t Hooft | The quantum black hole as a theoretical lab, a pedagogical treatment of
a new approach | 20 pages, 4 figures. Lectures held at the International School of
Subnuclear Physics, Ettore Majorana Scientific Centre, Erice, June 2018 | null | null | null | gr-qc hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Getting the mathematical rules for quantised black holes correctly is far
from straightforward. Many earlier treatises got it not quite correctly. The
general relativistic transformation linking the distant observer (who only
detects particles outside the hole) with the observations of a local observer
(who falls int... | [
{
"created": "Wed, 27 Feb 2019 11:42:21 GMT",
"version": "v1"
}
] | 2019-02-28 | [
[
"Hooft",
"Gerard t",
""
]
] | Getting the mathematical rules for quantised black holes correctly is far from straightforward. Many earlier treatises got it not quite correctly. The general relativistic transformation linking the distant observer (who only detects particles outside the hole) with the observations of a local observer (who falls into ... |
1111.5183 | Alexander Kamenshchik | Alexander Y. Kamenshchik and Serena Manti | Scalar field potentials for closed and open cosmological models | final version, to appear in General Relativity and Gravitation, the
title is changed | null | 10.1007/s10714-012-1384-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a technique for the reconstruction of the potential for a scalar
field or a tachyon field, reproducing a given cosmological evolution in a
closed and open isotropic cosmological models. Such potentials are explicitly
written down for the cases of the evolutions driven by a generic barotropic
fluid and by r... | [
{
"created": "Tue, 22 Nov 2011 12:49:42 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jun 2012 11:40:15 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Kamenshchik",
"Alexander Y.",
""
],
[
"Manti",
"Serena",
""
]
] | We develop a technique for the reconstruction of the potential for a scalar field or a tachyon field, reproducing a given cosmological evolution in a closed and open isotropic cosmological models. Such potentials are explicitly written down for the cases of the evolutions driven by a generic barotropic fluid and by rad... |
1410.2130 | Saul Teukolsky | Saul A. Teukolsky | The Kerr Metric | 37 pages. Submitted to Classical and Quantum Gravity for its
"Milestones of General Relativity" focus issue to be published during the
Centenary Year of GR. Minor edits to match journal article | null | 10.1088/0264-9381/32/12/124006 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This review describes the events leading up to the discovery of the Kerr
metric in 1963 and the enormous impact the discovery has had in the subsequent
50 years. The review discusses the Penrose process, the four laws of black hole
mechanics, uniqueness of the solution, and the no-hair theorems. It also
includes Kerr... | [
{
"created": "Wed, 8 Oct 2014 14:18:57 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Jan 2015 23:04:41 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Teukolsky",
"Saul A.",
""
]
] | This review describes the events leading up to the discovery of the Kerr metric in 1963 and the enormous impact the discovery has had in the subsequent 50 years. The review discusses the Penrose process, the four laws of black hole mechanics, uniqueness of the solution, and the no-hair theorems. It also includes Kerr p... |
1410.8031 | Andrey Shoom A | Andrey A. Shoom | Geometric Properties of Stationary and Axisymmetric Killing Horizons | 8 pages | null | 10.1103/PhysRevD.91.024019 | Alberta-Thy-16-14 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study some geometric properties of Killing horizons in 4-dimensional
stationary and axisymmetric space-times with electromagnetic field and
cosmological constant. Using a $(1+1+2)$ space-time split, we construct
relations between the space-time Riemann tensor components and components of
the Riemann tensor corresp... | [
{
"created": "Wed, 29 Oct 2014 15:48:53 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Shoom",
"Andrey A.",
""
]
] | We study some geometric properties of Killing horizons in 4-dimensional stationary and axisymmetric space-times with electromagnetic field and cosmological constant. Using a $(1+1+2)$ space-time split, we construct relations between the space-time Riemann tensor components and components of the Riemann tensor correspon... |
2304.06196 | Shuichi Yokoyama | Shuichi Yokoyama | Local Thermodynamics and Entropy for Relativistic Hydrostatic
Equilibrium | 9 pages, no figure, v2: some explanations, footnotes and references
added, v3: additional comparisons, comments and references added, published
version | null | null | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | By refining the method proposed in arXiv:2010.07660, entropy current and
entropy density for a relativistic hydrostatic equilibrium system with
spherical symmetry are constructed as a non-Noether conserved charge in the
Einstein gravity with cosmological constant. It is shown that the constructed
entropy density sati... | [
{
"created": "Thu, 13 Apr 2023 00:03:32 GMT",
"version": "v1"
},
{
"created": "Mon, 6 May 2024 16:45:04 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Jul 2024 14:38:47 GMT",
"version": "v3"
}
] | 2024-07-12 | [
[
"Yokoyama",
"Shuichi",
""
]
] | By refining the method proposed in arXiv:2010.07660, entropy current and entropy density for a relativistic hydrostatic equilibrium system with spherical symmetry are constructed as a non-Noether conserved charge in the Einstein gravity with cosmological constant. It is shown that the constructed entropy density satisf... |
1405.1291 | Iv\'an E. S\'anchez G. | Iv\'an E. S\'anchez G | Dark matter interacts with variable vacuum energy | 8 pages, 12 figures. arXiv admin note: text overlap with
arXiv:1310.5335 by other authors | General Relativity and Gravitation vol. 46, 1769 (2014) | 10.1007/s10714-014-1769-0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a spatially flat Friedmann-Robertson-Walker (FRW) scenario
with two interacting components, dark matter and variable vacuum energy (VVE)
densities, plus two decoupled components, one is a baryon term while the other
behaves as a radiation component. We consider a linear interaction in the
derivative da... | [
{
"created": "Tue, 6 May 2014 14:59:58 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Sep 2014 21:01:30 GMT",
"version": "v2"
}
] | 2015-08-21 | [
[
"G",
"Iván E. Sánchez",
""
]
] | We investigate a spatially flat Friedmann-Robertson-Walker (FRW) scenario with two interacting components, dark matter and variable vacuum energy (VVE) densities, plus two decoupled components, one is a baryon term while the other behaves as a radiation component. We consider a linear interaction in the derivative dark... |
gr-qc/0204056 | Nail R. Khusnutdinov | Valdir B. Bezerra and Nail R. Khusnutdinov | Bremsstrahlung in the gravitational field of a global monopole | revtex, 9 pages. accepted in Class. Quant. Grav | Class.Quant.Grav. 19 (2002) 3127-3138 | 10.1088/0264-9381/19/12/302 | null | gr-qc | null | We investigate the radiation emitted by a uniformly moving charged scalar
particle in the space-time of a point-like global monopole. We calculate the
total energy radiated by the particle and the corresponding spectrum, for small
solid angle deficit. We show that the radiated energy is proportional to the
cube of th... | [
{
"created": "Wed, 17 Apr 2002 15:28:47 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Bezerra",
"Valdir B.",
""
],
[
"Khusnutdinov",
"Nail R.",
""
]
] | We investigate the radiation emitted by a uniformly moving charged scalar particle in the space-time of a point-like global monopole. We calculate the total energy radiated by the particle and the corresponding spectrum, for small solid angle deficit. We show that the radiated energy is proportional to the cube of the ... |
0706.1930 | Lorenzo Iorio | Lorenzo Iorio | LARES/WEBER-SAT and the equivalence principle | LaTex, 4 pages, no figures, no tables, 26 references. Proofs
corrections included. To appear in EPL (Europhysics Letters) | Europhys.Lett.80:40007,2007 | 10.1209/0295-5075/80/40007 | null | gr-qc astro-ph hep-ph physics.space-ph | null | It has often been claimed that the proposed Earth artificial satellite
LARES/WEBER-SAT-whose primary goal is, in fact, the measurement of the general
relativistic Lense-Thirring effect at a some percent level-would allow to
greatly improve, among (many) other things, the present-day (10^-13) level of
accuracy in test... | [
{
"created": "Wed, 13 Jun 2007 15:25:22 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jun 2007 23:31:16 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Aug 2007 16:10:56 GMT",
"version": "v3"
},
{
"created": "Wed, 26 Sep 2007 22:50:06 GMT",
"version": "v4"
},
{
"cr... | 2008-11-26 | [
[
"Iorio",
"Lorenzo",
""
]
] | It has often been claimed that the proposed Earth artificial satellite LARES/WEBER-SAT-whose primary goal is, in fact, the measurement of the general relativistic Lense-Thirring effect at a some percent level-would allow to greatly improve, among (many) other things, the present-day (10^-13) level of accuracy in testin... |
1110.3112 | L. C. Garcia de Andrade | Garcia de Andrade and Angel Ferrandez | Decoupling between torsion and magnetic fields in bouncing cosmology and
galactic dynamo seeds | 7 pages Latex file | null | null | null | gr-qc astro-ph.CO math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently Salim et al [JCAP (2007)], have shown that galactic dynamo seeds can
be possibly attainable in bouncing cosmological models with QED Lagrangeans. In
this paper we generalise their result by include torsion of spacetime in
bouncing cosmology. It is shown that by considering a semi-minimal
photon-torsion coupl... | [
{
"created": "Fri, 14 Oct 2011 02:33:40 GMT",
"version": "v1"
}
] | 2011-10-17 | [
[
"de Andrade",
"Garcia",
""
],
[
"Ferrandez",
"Angel",
""
]
] | Recently Salim et al [JCAP (2007)], have shown that galactic dynamo seeds can be possibly attainable in bouncing cosmological models with QED Lagrangeans. In this paper we generalise their result by include torsion of spacetime in bouncing cosmology. It is shown that by considering a semi-minimal photon-torsion couplin... |
1909.11911 | Shao-Wen Wei | Shao-Wen Wei, Yu-Xiao Liu | Null geodesics, quasinormal modes, and thermodynamic phase transition
for charged black holes in asymptotically flat and dS spacetimes | 16 pages, 10 figures, and 2 tables | null | 10.1088/1674-1137/abae54 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The numerical study indicates that there exists a relation between the
quasinormal modes and the Davies point for a black hole. In this paper, we
analytically study this relation for the charged Reissner-Nordstr\"{o}m black
holes in asymptotically flat and dS spacetimes. In the eikonal limit, the
angular velocity $\O... | [
{
"created": "Thu, 26 Sep 2019 05:55:15 GMT",
"version": "v1"
}
] | 2020-12-02 | [
[
"Wei",
"Shao-Wen",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | The numerical study indicates that there exists a relation between the quasinormal modes and the Davies point for a black hole. In this paper, we analytically study this relation for the charged Reissner-Nordstr\"{o}m black holes in asymptotically flat and dS spacetimes. In the eikonal limit, the angular velocity $\Ome... |
1502.05468 | Yasusada Nambu | Yasusada Nambu and Sousuke Noda | Wave Optics in Black Hole Spacetimes: Schwarzschild Case | 23 pages, to be published in CQG | null | 10.1088/0264-9381/33/7/075011 | null | gr-qc physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the wave optics in the Schwarzschild spacetime. Applying the
standard formalism of wave scattering problems, the Green function represented
by the sum over the partial waves is evaluated using the Poisson sum formula.
The effect of orbiting scattering due to the unstable circular orbit for null
rays is... | [
{
"created": "Thu, 19 Feb 2015 05:32:06 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Feb 2016 03:58:12 GMT",
"version": "v2"
}
] | 2016-03-23 | [
[
"Nambu",
"Yasusada",
""
],
[
"Noda",
"Sousuke",
""
]
] | We investigate the wave optics in the Schwarzschild spacetime. Applying the standard formalism of wave scattering problems, the Green function represented by the sum over the partial waves is evaluated using the Poisson sum formula. The effect of orbiting scattering due to the unstable circular orbit for null rays is t... |
0812.0465 | Hirotaka Yoshino | Hirotaka Yoshino | On the existence of a static black hole on a brane | 26 pages, 9 figures, submitted to JHEP | JHEP 0901:068,2009 | 10.1088/1126-6708/2009/01/068 | Alberta-Thy-20-08 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a static black hole localized on a brane in the Randall-Sundrum (RS)
II braneworld scenario. To solve this problem numerically, we develop a code
having the almost 4th-order accuracy. This code derives the highly accurate
result for the case where the brane tension is zero, i.e., the spherically
symmetric ca... | [
{
"created": "Tue, 2 Dec 2008 11:50:37 GMT",
"version": "v1"
}
] | 2009-01-30 | [
[
"Yoshino",
"Hirotaka",
""
]
] | We study a static black hole localized on a brane in the Randall-Sundrum (RS) II braneworld scenario. To solve this problem numerically, we develop a code having the almost 4th-order accuracy. This code derives the highly accurate result for the case where the brane tension is zero, i.e., the spherically symmetric case... |
gr-qc/0608009 | J. Scott Little | J. Scott Little | The Projection Operator Method and the Ashtekar-Horowitz-Boulware Model | null | null | null | null | gr-qc | null | Motivated by the recent work of Louko and Molgado, we consider the
Ashtekar-Horowitz-Boulware model using the projection operator formalism. This
paper uses the techniques developed in a recent paper of Klauder and Little to
overcome the potential difficulties of this particular model. We also extend
the model by inc... | [
{
"created": "Tue, 1 Aug 2006 18:09:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Little",
"J. Scott",
""
]
] | Motivated by the recent work of Louko and Molgado, we consider the Ashtekar-Horowitz-Boulware model using the projection operator formalism. This paper uses the techniques developed in a recent paper of Klauder and Little to overcome the potential difficulties of this particular model. We also extend the model by inclu... |
1006.2149 | Luis Herrera | L. Herrera, A. Di Prisco, J. Ospino and J. Carot | Lemaitre-Tolman-Bondi dust spacetimes: Symmetry properties and some
extensions to the dissipative case | 13 pages RevTex. To appear in Phys. Rev. D. Some references corrected
and updated | Phys.Rev.D82:024021,2010 | 10.1103/PhysRevD.82.024021 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider extensions of Lemaitre-Tolman-Bondi (LTB) spacetimes to the
dissipative case. For doing that we previously carry out a systematic study on
LTB. This study is based on two different aspects of LTB. On the one hand, a
symmetry property of LTB will be presented. On the other hand, the description
of LTB in t... | [
{
"created": "Thu, 10 Jun 2010 20:33:07 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Jun 2010 22:57:52 GMT",
"version": "v2"
},
{
"created": "Fri, 16 Jul 2010 20:46:47 GMT",
"version": "v3"
}
] | 2014-11-21 | [
[
"Herrera",
"L.",
""
],
[
"Di Prisco",
"A.",
""
],
[
"Ospino",
"J.",
""
],
[
"Carot",
"J.",
""
]
] | We consider extensions of Lemaitre-Tolman-Bondi (LTB) spacetimes to the dissipative case. For doing that we previously carry out a systematic study on LTB. This study is based on two different aspects of LTB. On the one hand, a symmetry property of LTB will be presented. On the other hand, the description of LTB in ter... |
1910.06952 | Matheus Soares | M. S. Soares, N. F. Svaiter, C. A. D. Zarro | Multiplicative Noise in Euclidean Schwarzschild Manifold | Version to match the one to appear in Classical and Quantum Gravity | null | 10.1088/1361-6382/ab4fd3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a $\lambda\varphi^{4}+\rho\varphi^{6}$ scalar field model defined
in the Euclidean section of the Schwarzschild solution of the Einstein
equations in the presence of multiplicative noise. The multiplicative random
noise is a model for fluctuations of the Hawking temperature. We adopt the
standard procedure... | [
{
"created": "Tue, 15 Oct 2019 17:48:24 GMT",
"version": "v1"
}
] | 2020-04-08 | [
[
"Soares",
"M. S.",
""
],
[
"Svaiter",
"N. F.",
""
],
[
"Zarro",
"C. A. D.",
""
]
] | We discuss a $\lambda\varphi^{4}+\rho\varphi^{6}$ scalar field model defined in the Euclidean section of the Schwarzschild solution of the Einstein equations in the presence of multiplicative noise. The multiplicative random noise is a model for fluctuations of the Hawking temperature. We adopt the standard procedure o... |
2403.11534 | Sebastian Khan | Sebastian Khan | Probabilistic Model for the Gravitational Wave Signal from Merging Black
Holes | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Parameterised models that predict the gravitational-wave (GW) signal from
merging black holes are used to extract source properties from GW observations.
The majority of research in this area has focused on developing methods capable
of producing highly accurate, point-estimate, predictions for the GW signal. A
key e... | [
{
"created": "Mon, 18 Mar 2024 07:38:36 GMT",
"version": "v1"
}
] | 2024-03-19 | [
[
"Khan",
"Sebastian",
""
]
] | Parameterised models that predict the gravitational-wave (GW) signal from merging black holes are used to extract source properties from GW observations. The majority of research in this area has focused on developing methods capable of producing highly accurate, point-estimate, predictions for the GW signal. A key ele... |
1409.0985 | Jing-Bo Wang | Jingbo Wang, Chao-Guang Huang | The Entropy of Higher Dimensional Nonrotating Isolated Horizons from
Loop Quantum Gravity | null | null | 10.1088/0264-9381/32/3/035026 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we extend the calculation of the entropy of the nonrotating
isolated horizons in 4 dimensional spacetime to that in a higher dimensional
spacetime. We show that the boundary degrees of freedom on an isolated horizon
can be described effectively by a punctured $SO(1,1)$ BF theory. Then the
entropy of th... | [
{
"created": "Wed, 3 Sep 2014 08:19:39 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Wang",
"Jingbo",
""
],
[
"Huang",
"Chao-Guang",
""
]
] | In this paper, we extend the calculation of the entropy of the nonrotating isolated horizons in 4 dimensional spacetime to that in a higher dimensional spacetime. We show that the boundary degrees of freedom on an isolated horizon can be described effectively by a punctured $SO(1,1)$ BF theory. Then the entropy of the ... |
2105.09514 | Kiyoshi Shiraishi | Nahomi Kan, Takuma Aoyama, Taiga Hasegawa, Kiyoshi Shiraishi | Eisenhart--Duval lift for minisuperspace quantum cosmology | 19 pages, no figure. Final version | Phys. Rev. D 104, 086001 (2021) | 10.1103/PhysRevD.104.086001 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study covariant equations in quantum cosmology of an extended
minisuperspace obtained by the Eisenhart--Duval lift. We find that a Dirac-type
equation is naturally introduced in the extended minisuperspace. Explicit forms
of the fundamental solutions are yielded for specific models. The possible
further developmen... | [
{
"created": "Thu, 20 May 2021 04:56:53 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Jun 2021 01:38:56 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Jul 2021 01:03:56 GMT",
"version": "v3"
},
{
"created": "Mon, 30 Aug 2021 08:44:37 GMT",
"version": "v4"
},
{
"c... | 2021-10-06 | [
[
"Kan",
"Nahomi",
""
],
[
"Aoyama",
"Takuma",
""
],
[
"Hasegawa",
"Taiga",
""
],
[
"Shiraishi",
"Kiyoshi",
""
]
] | We study covariant equations in quantum cosmology of an extended minisuperspace obtained by the Eisenhart--Duval lift. We find that a Dirac-type equation is naturally introduced in the extended minisuperspace. Explicit forms of the fundamental solutions are yielded for specific models. The possible further development ... |
gr-qc/0312036 | Pedro Marronetti | Pedro Marronetti, Matthew D. Duez, Stuart L. Shapiro and Thomas W.
Baumgarte | Dynamical Determination of the Innermost Stable Circular Orbit of Binary
Neutron Stars | 5 pages, 4 figures. Minor comments and discussions added. Version
accepted for publication in Phys. Rev. Letters | Phys.Rev.Lett. 92 (2004) 141101 | 10.1103/PhysRevLett.92.141101 | null | gr-qc astro-ph | null | We determine the innermost stable circular orbit (ISCO) of binary neutron
stars (BNSs) by performing dynamical simulations in full general relativity.
Evolving quasiequilibrium (QE) binaries that begin at different separations, we
bracket the location of the ISCO by distinguishing stable circular orbits from
unstable... | [
{
"created": "Fri, 5 Dec 2003 21:00:06 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Feb 2004 17:50:22 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Marronetti",
"Pedro",
""
],
[
"Duez",
"Matthew D.",
""
],
[
"Shapiro",
"Stuart L.",
""
],
[
"Baumgarte",
"Thomas W.",
""
]
] | We determine the innermost stable circular orbit (ISCO) of binary neutron stars (BNSs) by performing dynamical simulations in full general relativity. Evolving quasiequilibrium (QE) binaries that begin at different separations, we bracket the location of the ISCO by distinguishing stable circular orbits from unstable p... |
2311.04050 | C Fairoos | C. Fairoos | Topological Interpretation of Black Hole Phase Transition in
Gauss-Bonnet Gravity | 12 pages, 9 figures, published version | null | 10.1142/S0217751X24500301 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Phase transitions of Einstein-Gauss-Bonnet black holes are studied using
Duan's $\phi-$ field topological current theory, where black holes are treated
as topological defects in the thermodynamic parameter space. The kinetics of
thermodynamic defects are studied using Duan's bifurcation theory. In this
picture, a fir... | [
{
"created": "Tue, 7 Nov 2023 15:04:53 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Nov 2023 07:59:09 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Apr 2024 17:35:03 GMT",
"version": "v3"
}
] | 2024-04-17 | [
[
"Fairoos",
"C.",
""
]
] | Phase transitions of Einstein-Gauss-Bonnet black holes are studied using Duan's $\phi-$ field topological current theory, where black holes are treated as topological defects in the thermodynamic parameter space. The kinetics of thermodynamic defects are studied using Duan's bifurcation theory. In this picture, a first... |
1601.00102 | Sunny Vagnozzi | Guido Cognola, Ratbay Myrzakulov, Lorenzo Sebastiani, Sunny Vagnozzi,
Sergio Zerbini | Covariant Horava-like and mimetic Horndeski gravity: cosmological
solutions and perturbations | v3: corrected some minor typos found post-publication | Class. Quant. Grav. 33 (2016) 225014 | 10.1088/0264-9381/33/22/225014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a variant of the Nojiri-Odintsov covariant Horava-like
gravitational model, where diffeomorphism invariance is broken dynamically via
a non-standard coupling to a perfect fluid. The theory allows to address some
of the potential instability problems present in Horava-Lifshitz gravity due to
explicit diffe... | [
{
"created": "Fri, 1 Jan 2016 18:23:09 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Sep 2016 18:36:22 GMT",
"version": "v2"
},
{
"created": "Fri, 1 Jun 2018 12:28:02 GMT",
"version": "v3"
}
] | 2018-12-13 | [
[
"Cognola",
"Guido",
""
],
[
"Myrzakulov",
"Ratbay",
""
],
[
"Sebastiani",
"Lorenzo",
""
],
[
"Vagnozzi",
"Sunny",
""
],
[
"Zerbini",
"Sergio",
""
]
] | We consider a variant of the Nojiri-Odintsov covariant Horava-like gravitational model, where diffeomorphism invariance is broken dynamically via a non-standard coupling to a perfect fluid. The theory allows to address some of the potential instability problems present in Horava-Lifshitz gravity due to explicit diffeom... |
1812.06345 | Yu-Xiao Liu | Yu-Peng Zhang, Shao-Wen Wei, Pau Amaro-Seoane, Jie Yang, Yu-Xiao Liu | Motion deviation of test body induced by spin and cosmological constant
in extreme mass ratio inspiral binary system | 12 pages, 2 figures, 7 tables | Eur.Phys.J. C79 (2019) 856 | 10.1140/epjc/s10052-019-7334-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The future space-borne detectors will provide the possibility to detect
gravitational waves emitted from extreme mass ratio inspirals of stellar-mass
compact objects into supermassive black holes. It is natural to expect that the
spin of the compact object and cosmological constant will affect the orbit of
the inspir... | [
{
"created": "Sat, 15 Dec 2018 20:19:08 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Nov 2019 08:45:07 GMT",
"version": "v2"
}
] | 2019-11-14 | [
[
"Zhang",
"Yu-Peng",
""
],
[
"Wei",
"Shao-Wen",
""
],
[
"Amaro-Seoane",
"Pau",
""
],
[
"Yang",
"Jie",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | The future space-borne detectors will provide the possibility to detect gravitational waves emitted from extreme mass ratio inspirals of stellar-mass compact objects into supermassive black holes. It is natural to expect that the spin of the compact object and cosmological constant will affect the orbit of the inspiral... |
gr-qc/9404034 | Masayuki Tanimoto | Masayuki Tanimoto | Static axisymmetric spacetimes with non-generic world-line SUSY | 10 pages (RevTeX), TIT/HEP-253/COSMO-44 | Phys.Rev.D50:2595-2599,1994 | 10.1103/PhysRevD.50.2595 | null | gr-qc | null | The conditions for the existence of Killing-Yano tensors, which are closely
related to the appearance of non-generic world-line SUSY, are presented for
static axisymmetric spacetimes. Imposing the vacuum Einstein equation, the set
of solutions admitting Killing-Yano tensors is considered. In particular, it is
shown t... | [
{
"created": "Mon, 18 Apr 1994 09:08:16 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Tanimoto",
"Masayuki",
""
]
] | The conditions for the existence of Killing-Yano tensors, which are closely related to the appearance of non-generic world-line SUSY, are presented for static axisymmetric spacetimes. Imposing the vacuum Einstein equation, the set of solutions admitting Killing-Yano tensors is considered. In particular, it is shown tha... |
2009.05111 | Andreas G. A. Pithis | Astrid Eichhorn, Antonio D. Pereira, Andreas G. A. Pithis | The phase diagram of the multi-matrix model with ABAB-interaction from
functional renormalization | 32 pages, 6 figures, 2 tables; matches published version | J. High Energ. Phys. 2020, 131 (2020) | 10.1007/JHEP12(2020)131 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | At criticality, discrete quantum-gravity models are expected to give rise to
continuum spacetime. Recent progress has established the functional
renormalization group method in the context of such models as a practical tool
to study their critical properties and to chart their phase diagrams. Here, we
apply these tec... | [
{
"created": "Thu, 10 Sep 2020 19:27:17 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Dec 2020 08:12:13 GMT",
"version": "v2"
}
] | 2020-12-29 | [
[
"Eichhorn",
"Astrid",
""
],
[
"Pereira",
"Antonio D.",
""
],
[
"Pithis",
"Andreas G. A.",
""
]
] | At criticality, discrete quantum-gravity models are expected to give rise to continuum spacetime. Recent progress has established the functional renormalization group method in the context of such models as a practical tool to study their critical properties and to chart their phase diagrams. Here, we apply these techn... |
2005.04677 | Mohammad Nouri-Zonoz | M. Nouri-Zonoz and A. Nouri-Zonoz | Stationary analogs of de Sitter and anti-de Sitter spacetimes: Evidence
in favor of $\Lambda$ as a dark fluid | 9 pages, refs. added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce novel Einstein spaces which are the {\it stationary analogs of
de Sitter and ani-de Sitter} spacetimes. Having $\Lambda$ as their only
parameter, the inherent anisotropy in these solutions appears as a dilemma if
we treat the cosmological term as a constant background curvature. Since the
cosmological te... | [
{
"created": "Sun, 10 May 2020 14:25:22 GMT",
"version": "v1"
},
{
"created": "Fri, 15 May 2020 10:43:41 GMT",
"version": "v2"
}
] | 2020-05-18 | [
[
"Nouri-Zonoz",
"M.",
""
],
[
"Nouri-Zonoz",
"A.",
""
]
] | We introduce novel Einstein spaces which are the {\it stationary analogs of de Sitter and ani-de Sitter} spacetimes. Having $\Lambda$ as their only parameter, the inherent anisotropy in these solutions appears as a dilemma if we treat the cosmological term as a constant background curvature. Since the cosmological term... |
gr-qc/9906100 | Claus Kiefer | Claus Kiefer | Conceptual issues in quantum cosmology | 31 pages, LATEX, needs Springer macro cl2emult.cls, 3 eps-figures,
contribution for the Karpacz winter school 1999 | Lect.Notes Phys. 541 (2000) 158-187 | null | Freiburg THEP-99/7 | gr-qc | null | I give a review of the conceptual issues that arise in theories of quantum
cosmology. I start by emphasising some features of ordinary quantum theory that
also play a crucial role in understanding quantum cosmology. I then give
motivations why spacetime cannot be treated classically at the most fundamental
level. Two... | [
{
"created": "Thu, 24 Jun 1999 07:56:51 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kiefer",
"Claus",
""
]
] | I give a review of the conceptual issues that arise in theories of quantum cosmology. I start by emphasising some features of ordinary quantum theory that also play a crucial role in understanding quantum cosmology. I then give motivations why spacetime cannot be treated classically at the most fundamental level. Two i... |
gr-qc/0403009 | Alexander I. Nesterov | Alexander I. Nesterov | On angular momentum of gravitational radiation | Revtex4 style | Phys.Lett. A250 (1998) 55-61 | 10.1016/S0375-9601(98)00768-3 | null | gr-qc | null | The quasigroup approach to the conservation laws (Phys. Rev. D56, R7498
(1997)) is completed by imposing new gauge conditions for asymptotic
symmetries. Noether charge associated with an arbitrary element of the
Poincar\'e quasialgebra is free from the supertranslational ambiquity and
identically vanishes in a flat s... | [
{
"created": "Tue, 2 Mar 2004 04:27:58 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Nesterov",
"Alexander I.",
""
]
] | The quasigroup approach to the conservation laws (Phys. Rev. D56, R7498 (1997)) is completed by imposing new gauge conditions for asymptotic symmetries. Noether charge associated with an arbitrary element of the Poincar\'e quasialgebra is free from the supertranslational ambiquity and identically vanishes in a flat spa... |
1002.4618 | Paul Reska | Igor Khavkine, Renate Loll and Paul Reska | Coupling a Point-Like Mass to Quantum Gravity with Causal Dynamical
Triangulations | 26 pages, 9 figures, updated published version | Class.Quant.Grav.27:185025,2010 | 10.1088/0264-9381/27/18/185025 | ITP-UU-09/59, SPIN-09/49 | gr-qc hep-lat hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a possibility of coupling a point-like, non-singular, mass
distribution to four-dimensional quantum gravity in the nonperturbative setting
of causal dynamical triangulations (CDT). In order to provide a point of
comparison for the classical limit of the matter-coupled CDT model, we derive
the spatial volum... | [
{
"created": "Wed, 24 Feb 2010 21:18:04 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Sep 2010 11:41:00 GMT",
"version": "v2"
}
] | 2010-09-16 | [
[
"Khavkine",
"Igor",
""
],
[
"Loll",
"Renate",
""
],
[
"Reska",
"Paul",
""
]
] | We present a possibility of coupling a point-like, non-singular, mass distribution to four-dimensional quantum gravity in the nonperturbative setting of causal dynamical triangulations (CDT). In order to provide a point of comparison for the classical limit of the matter-coupled CDT model, we derive the spatial volume ... |
1711.08372 | \"Ozg\"ur Akarsu | Ozgur Akarsu, Alexey Chopovsky, Alexander Zhuk | Black branes and black strings in the astrophysical and cosmological
context | 7 pages, no figures and tables; matches the version published in
Physics Letters B | Physics Letters B 778 (2018) 190-196 | 10.1016/j.physletb.2018.01.022 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider Kaluza-Klein models where internal spaces are compact flat or
curved Einstein spaces. This background is perturbed by a compact gravitating
body with the dust-like equation of state (EoS) in the external/our space and
an arbitrary EoS parameter $\Omega$ in the internal space. Without imposing any
restrict... | [
{
"created": "Wed, 22 Nov 2017 16:23:03 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Jan 2018 16:32:20 GMT",
"version": "v2"
}
] | 2018-01-25 | [
[
"Akarsu",
"Ozgur",
""
],
[
"Chopovsky",
"Alexey",
""
],
[
"Zhuk",
"Alexander",
""
]
] | We consider Kaluza-Klein models where internal spaces are compact flat or curved Einstein spaces. This background is perturbed by a compact gravitating body with the dust-like equation of state (EoS) in the external/our space and an arbitrary EoS parameter $\Omega$ in the internal space. Without imposing any restrictio... |
1611.06606 | Rui Pedro Lopes de Azevedo | R.P.L. Azevedo and J. P\'aramos | Cosmological dynamics of a class of non-minimally coupled models of
gravity | 8 pages, 4 figures, 2 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work a new non-minimally coupled model is presented, where a generic
function $f(R)$ of the scalar curvature factors the usual Einstein-Hilbert
action functional, motivated by relevant results obtained from similar models.
Its cosmological dynamics are derived and the possibility of attaining a phase
of accel... | [
{
"created": "Sun, 20 Nov 2016 22:49:02 GMT",
"version": "v1"
}
] | 2016-11-22 | [
[
"Azevedo",
"R. P. L.",
""
],
[
"Páramos",
"J.",
""
]
] | In this work a new non-minimally coupled model is presented, where a generic function $f(R)$ of the scalar curvature factors the usual Einstein-Hilbert action functional, motivated by relevant results obtained from similar models. Its cosmological dynamics are derived and the possibility of attaining a phase of acceler... |
1603.02267 | Alicia Simon-Petit | Alicia Simon-Petit, Han-Hoe Yap and J\'er\^ome Perez | Refinements in the Jungle Universes | 5 pages, 5 figures, proceeding of the 28th Texas Symposium on
Relativistic Astrophysics | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | How can effective barotropic matter emerge from the interaction of
cosmological fluids in an isotropic and homogeneous cosmological model ?
The dynamics of homogeneous and isotropic
Friedmann-Lema\^itre-Robertson-Walker universes is a natural special case of
generalized Lotka-Volterra systems where each of the univ... | [
{
"created": "Mon, 7 Mar 2016 13:59:01 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Mar 2016 13:24:31 GMT",
"version": "v2"
}
] | 2016-03-22 | [
[
"Simon-Petit",
"Alicia",
""
],
[
"Yap",
"Han-Hoe",
""
],
[
"Perez",
"Jérôme",
""
]
] | How can effective barotropic matter emerge from the interaction of cosmological fluids in an isotropic and homogeneous cosmological model ? The dynamics of homogeneous and isotropic Friedmann-Lema\^itre-Robertson-Walker universes is a natural special case of generalized Lotka-Volterra systems where each of the universe... |
2001.09553 | Niayesh Afshordi | Jahed Abedi (AEI, Hanover), Niayesh Afshordi (UW/PI), Naritaka Oshita
(PI), Qingwen Wang (UW/PI) | Quantum Black Holes in the Sky | 78 pages, 42 figures, Invited review article for the special issue of
the journal "Universe" on "Probing new physics with black holes", Comment are
very welcome! | null | null | null | gr-qc astro-ph.CO astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black Holes are possibly the most enigmatic objects in our Universe. From
their detection in gravitational waves upon their mergers, to their snapshot
eating at the centres of galaxies, black hole astrophysics has undergone an
observational renaissance in the past 4 years. Nevertheless, they remain active
playgrounds... | [
{
"created": "Fri, 24 Jan 2020 18:53:50 GMT",
"version": "v1"
}
] | 2020-01-28 | [
[
"Abedi",
"Jahed",
"",
"AEI, Hanover"
],
[
"Afshordi",
"Niayesh",
"",
"UW/PI"
],
[
"Oshita",
"Naritaka",
"",
"PI"
],
[
"Wang",
"Qingwen",
"",
"UW/PI"
]
] | Black Holes are possibly the most enigmatic objects in our Universe. From their detection in gravitational waves upon their mergers, to their snapshot eating at the centres of galaxies, black hole astrophysics has undergone an observational renaissance in the past 4 years. Nevertheless, they remain active playgrounds f... |
1902.05941 | Pedro Bargueno | E. Contreras, \'A. Rinc\'on, and P. Bargue\~no | Five-dimensional scale-dependent black holes with constant curvature and
Solv horizons | 9 pages. Some comments added | null | 10.1140/epjc/s10052-020-7936-4 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we investigate five-dimensional scale-dependent black hole
solutions by modelling their event horizon with some of the eight Thurston
three-dimensional geometries. Specifically, we construct constant curvature
scale-dependent black holes and also the more exotic scale-dependent Solv black
hole. These ne... | [
{
"created": "Fri, 15 Feb 2019 18:49:00 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Feb 2019 13:57:00 GMT",
"version": "v2"
}
] | 2020-05-20 | [
[
"Contreras",
"E.",
""
],
[
"Rincón",
"Á.",
""
],
[
"Bargueño",
"P.",
""
]
] | In this work, we investigate five-dimensional scale-dependent black hole solutions by modelling their event horizon with some of the eight Thurston three-dimensional geometries. Specifically, we construct constant curvature scale-dependent black holes and also the more exotic scale-dependent Solv black hole. These new ... |
2004.07813 | Mohamed Ould El Hadj | Antoine Folacci, Mohamed Ould El Hadj | Electromagnetic radiation generated by a charged particle falling
radially into a Schwarzschild black hole: A complex angular momentum
description | arXiv admin note: substantial text overlap with arXiv:1807.09056, v2
: A few typos corrected and minor changes in the text to match the published
version | Phys. Rev. D 102, 024026 (2020) | 10.1103/PhysRevD.102.024026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By using complex angular momentum techniques, we study the electromagnetic
radiation generated by a charged particle falling radially from infinity into a
Schwarzschild black hole. We consider both the case of a particle initially at
rest and that of a particle projected with a relativistic velocity and we
construct ... | [
{
"created": "Wed, 15 Apr 2020 18:00:02 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Jun 2020 09:53:54 GMT",
"version": "v2"
}
] | 2020-07-07 | [
[
"Folacci",
"Antoine",
""
],
[
"Hadj",
"Mohamed Ould El",
""
]
] | By using complex angular momentum techniques, we study the electromagnetic radiation generated by a charged particle falling radially from infinity into a Schwarzschild black hole. We consider both the case of a particle initially at rest and that of a particle projected with a relativistic velocity and we construct co... |
gr-qc/9507017 | Kawai | Toshiharu Kawai | Generators of Internal Lorentz Transformations and of General Affine
Coordinate Transformations in Teleparallel Theory of (2+1)-Dimensional
Gravity --- Cases with Static Circularly Symmetric Space-Times--- | 18 pages, LaTeX | Prog.Theor.Phys. 94 (1995) 915-930 | 10.1143/PTP.94.915 | OCU-PHYS-156 | gr-qc | null | In a teleparallel theory of (2+1)-dimensional gravity developed in a previous
paper, we examine generators of internal Lorentz transformations and of general
affine coordinate transformations for static circularly symmetric exact
solutions of gravitational field equation. The \lq \lq spin" angular momentum,
the energ... | [
{
"created": "Fri, 7 Jul 1995 08:18:33 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Kawai",
"Toshiharu",
""
]
] | In a teleparallel theory of (2+1)-dimensional gravity developed in a previous paper, we examine generators of internal Lorentz transformations and of general affine coordinate transformations for static circularly symmetric exact solutions of gravitational field equation. The \lq \lq spin" angular momentum, the energy-... |
0708.3288 | William Nelson | William Nelson | The probability of inflation in Loop Quantum Cosmology | Proceedings for the International Workshop ``From Quantum to Emergent
Gravity: Theory and Phenomenology'', SISSA, Trieste (Italy), June 11-15 2007 | null | null | null | gr-qc | null | The probability of there being sufficient inflation to solve the fine-tuning
associated with the horizon and flatness problems has recently been shown to be
exponentially small, within the context of classical general relativity. Here
this result is extended by considering loop quantum gravity effects, that are
signi... | [
{
"created": "Fri, 24 Aug 2007 08:35:29 GMT",
"version": "v1"
}
] | 2007-08-27 | [
[
"Nelson",
"William",
""
]
] | The probability of there being sufficient inflation to solve the fine-tuning associated with the horizon and flatness problems has recently been shown to be exponentially small, within the context of classical general relativity. Here this result is extended by considering loop quantum gravity effects, that are signifi... |
1812.01117 | George Pappas Dr | George Pappas, Daniela D. Doneva, Thomas P. Sotiriou, Stoytcho S.
Yazadjiev, Kostas D. Kokkotas | Multipole moments and universal relations for scalarized neutron stars | 15 pages 5 figures | Phys. Rev. D 99, 104014 (2019) | 10.1103/PhysRevD.99.104014 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent years there has been a surge of interest in what has come to be
known as the `universal relations' between various global properties of neutron
stars. These universal relations are equation of state independent relations
between quantities such as the moment of inertia $I$, the tidal deformability
or Love n... | [
{
"created": "Mon, 3 Dec 2018 22:46:53 GMT",
"version": "v1"
}
] | 2019-05-13 | [
[
"Pappas",
"George",
""
],
[
"Doneva",
"Daniela D.",
""
],
[
"Sotiriou",
"Thomas P.",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
],
[
"Kokkotas",
"Kostas D.",
""
]
] | In recent years there has been a surge of interest in what has come to be known as the `universal relations' between various global properties of neutron stars. These universal relations are equation of state independent relations between quantities such as the moment of inertia $I$, the tidal deformability or Love num... |
1112.1630 | Remo Garattini | Remo Garattini | Modified Dispersion Relations: from Black-Hole Entropy to the
Cosmological Constant | Contribution prepared for the proceedings of the conference on
quantum field theory under the influence of external conditions (QFEXT11). 8
pages | null | 10.1142/S2010194512007441 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum Field Theory is plagued by divergences in the attempt to calculate
physical quantities. Standard techniques of regularization and renormalization
are used to keep under control such a problem. In this paper we would like to
use a different scheme based on Modified Dispersion Relations (MDR) to remove
infiniti... | [
{
"created": "Wed, 7 Dec 2011 17:10:17 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Garattini",
"Remo",
""
]
] | Quantum Field Theory is plagued by divergences in the attempt to calculate physical quantities. Standard techniques of regularization and renormalization are used to keep under control such a problem. In this paper we would like to use a different scheme based on Modified Dispersion Relations (MDR) to remove infinities... |
gr-qc/9403004 | null | Arvind Borde and Alexander Vilenkin | The Impossibility of Steady-State Inflation | 14 pages, Plain TeX, Tufts Institute of Cosmology preprint | null | null | null | gr-qc | null | Inflation is known to be generically eternal to the future: the false vacuum
is thermalized in some regions of space, while inflation continues in other
regions. Here, we address the question of whether inflation can also be eternal
to the past. We argue that such a steady-state picture is impossible and,
therefore, ... | [
{
"created": "Wed, 2 Mar 1994 06:51:52 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Borde",
"Arvind",
""
],
[
"Vilenkin",
"Alexander",
""
]
] | Inflation is known to be generically eternal to the future: the false vacuum is thermalized in some regions of space, while inflation continues in other regions. Here, we address the question of whether inflation can also be eternal to the past. We argue that such a steady-state picture is impossible and, therefore, th... |
0710.4115 | Mauricio Bellini | Jose Edgar Madriz Aguilar (Paraiba University), Mauricio Bellini (Mar
del Plata University & CONICET), Marco Aurelio S. Cruz (Paraiba University) | Phantom cosmology with a decaying cosmological function $\Lambda(t)$
induced from five-dimensional (5D) geometrical vacuum | final version | Grav.Cosmol.14:286-291,2008 | 10.1134/S0202289308030122 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Introducing a variable cosmological function $\Lambda (t)$ in a geometrical
manner from a 5D Riemann-flat metric, we investigate the possibility of having
a geometrical criterion to choose a suitable cosmological function $\Lambda
(t)$ for every 4D dynamical hypersurface capable of generate phantom
cosmologies.
| [
{
"created": "Mon, 22 Oct 2007 18:11:01 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Nov 2007 17:48:58 GMT",
"version": "v2"
},
{
"created": "Sat, 19 Jan 2008 13:55:58 GMT",
"version": "v3"
},
{
"created": "Thu, 10 Jul 2008 18:27:07 GMT",
"version": "v4"
}
] | 2009-11-13 | [
[
"Aguilar",
"Jose Edgar Madriz",
"",
"Paraiba University"
],
[
"Bellini",
"Mauricio",
"",
"Mar\n del Plata University & CONICET"
],
[
"Cruz",
"Marco Aurelio S.",
"",
"Paraiba University"
]
] | Introducing a variable cosmological function $\Lambda (t)$ in a geometrical manner from a 5D Riemann-flat metric, we investigate the possibility of having a geometrical criterion to choose a suitable cosmological function $\Lambda (t)$ for every 4D dynamical hypersurface capable of generate phantom cosmologies. |
2008.07749 | Tao Zhou | Tao Zhou | A non-relativistic theory of quantum mechanics and gravity with local
modulus symmetry | 29 pages, 1 figure | null | null | null | gr-qc astro-ph.GA quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inspired by the similarities between quantum field theory and general
relativity, in that each theory encompasses two universal constants and a local
symmetry, we set out to construct a non-relativistic theory of quantum
mechanics and gravity based upon two assumptions: quantum system remains
invariant to local modul... | [
{
"created": "Tue, 18 Aug 2020 05:36:11 GMT",
"version": "v1"
}
] | 2020-08-19 | [
[
"Zhou",
"Tao",
""
]
] | Inspired by the similarities between quantum field theory and general relativity, in that each theory encompasses two universal constants and a local symmetry, we set out to construct a non-relativistic theory of quantum mechanics and gravity based upon two assumptions: quantum system remains invariant to local modulus... |
1902.08374 | Anzhong Wang | Xing Zhang, Wen Zhao, Tan Liu, Kai Lin, Chao Zhang, Xiang Zhao,
Shaojun Zhang, Tao Zhu, Anzhong Wang | Constraints of general screened modified gravities from comprehensive
analysis of binary pulsars | 14 pages, 20 figures, 2 tables, Astrophysical. J. 874 (2019) 121 (11
pages) | Astrophysical. J. 874 (2019) 121 | 10.3847/1538-4357/ab09f4 | null | gr-qc astro-ph.CO astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Testing gravity by binary pulsars nowadays becomes a key issue. Screened
modified gravity is a kind of scalar-tensor theory with screening mechanism in
order to satisfy the tight Solar System tests. In this paper, we investigate
how the screening mechanism affects the orbital dynamics of binary pulsars, and
calculate... | [
{
"created": "Fri, 22 Feb 2019 06:30:06 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Mar 2020 16:38:51 GMT",
"version": "v2"
},
{
"created": "Mon, 2 Mar 2020 16:31:35 GMT",
"version": "v3"
}
] | 2020-03-04 | [
[
"Zhang",
"Xing",
""
],
[
"Zhao",
"Wen",
""
],
[
"Liu",
"Tan",
""
],
[
"Lin",
"Kai",
""
],
[
"Zhang",
"Chao",
""
],
[
"Zhao",
"Xiang",
""
],
[
"Zhang",
"Shaojun",
""
],
[
"Zhu",
"Tao",
""
]... | Testing gravity by binary pulsars nowadays becomes a key issue. Screened modified gravity is a kind of scalar-tensor theory with screening mechanism in order to satisfy the tight Solar System tests. In this paper, we investigate how the screening mechanism affects the orbital dynamics of binary pulsars, and calculate i... |
gr-qc/9803050 | Bill Unruh | W. Unruh (U.B.C.) | On the Hawking Turok solution to the Open Universe wave function | 8pp, 1 figure | null | null | null | gr-qc | null | Hawking and Turok have recently published a solution to the WKB
"wave-function for the universe" which they claim leads in a natural way to an
open universe as the end point of the evolution for a universe dominated by a
scalar field. They furthermore argue that their solution a preferred solution
under the rules of ... | [
{
"created": "Fri, 13 Mar 1998 18:43:41 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Mar 1998 02:26:27 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Unruh",
"W.",
"",
"U.B.C."
]
] | Hawking and Turok have recently published a solution to the WKB "wave-function for the universe" which they claim leads in a natural way to an open universe as the end point of the evolution for a universe dominated by a scalar field. They furthermore argue that their solution a preferred solution under the rules of th... |
1209.5512 | Mohammad Malekjani | M. Malekjani | Generalized holographic dark energy model described at the Hubble length | 11 pages, 3 figures | Astrophys. Space Sci. 347 (2013) 405-410 | 10.1007/s10509-013-1522-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize the holographic dark energy model described in Hubble length IR
cutoff by assuming a slowly time varying function for holographic parameter
$c^2$. We calculate the evolution of EoS parameter and the deceleration
parameter as well as the evolution of dark energy density in this generalized
model. We show... | [
{
"created": "Tue, 25 Sep 2012 06:40:17 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Malekjani",
"M.",
""
]
] | We generalize the holographic dark energy model described in Hubble length IR cutoff by assuming a slowly time varying function for holographic parameter $c^2$. We calculate the evolution of EoS parameter and the deceleration parameter as well as the evolution of dark energy density in this generalized model. We show t... |
gr-qc/0303019 | Chiu-Chu Melissa Liu | Chiu-Chu Melissa Liu, Shing-Tung Yau | Positivity of Quasilocal Mass | 4 pages; final published version | Phys.Rev.Lett.90:231102,2003 | 10.1103/PhysRevLett.90.231102 | null | gr-qc math.DG | null | Motivated by the important work of Brown adn York on quasilocal energy, we
propose definitions of quasilocal energy and momentum surface energy of a
spacelike 2-surface with positive intrinsic curvature in a spacetime. We show
that the quasilocal energy of the boundary of a compact spacelike hypersurface
which satisf... | [
{
"created": "Wed, 5 Mar 2003 02:10:05 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Jun 2003 03:39:34 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Liu",
"Chiu-Chu Melissa",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | Motivated by the important work of Brown adn York on quasilocal energy, we propose definitions of quasilocal energy and momentum surface energy of a spacelike 2-surface with positive intrinsic curvature in a spacetime. We show that the quasilocal energy of the boundary of a compact spacelike hypersurface which satisfie... |
1502.04703 | Florian Kuhnel | Roberto Casadio, Florian Kuhnel, Alessio Orlandi | Consistent Cosmic Microwave Background Spectra from Quantum Depletion | 23 pages, 9 figures; revised version to match published version | null | 10.1088/1475-7516/2015/09/002 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following a new quantum cosmological model proposed by Dvali and Gomez, we
quantitatively investigate possible modifications to the Hubble parameter and
following corrections to the cosmic microwave background spectrum. In this
model, scalar and tensor perturbations are generated by the quantum depletion
of the backg... | [
{
"created": "Mon, 16 Feb 2015 21:00:09 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Aug 2015 10:29:33 GMT",
"version": "v2"
}
] | 2015-09-16 | [
[
"Casadio",
"Roberto",
""
],
[
"Kuhnel",
"Florian",
""
],
[
"Orlandi",
"Alessio",
""
]
] | Following a new quantum cosmological model proposed by Dvali and Gomez, we quantitatively investigate possible modifications to the Hubble parameter and following corrections to the cosmic microwave background spectrum. In this model, scalar and tensor perturbations are generated by the quantum depletion of the backgro... |
2407.17724 | Chien Yu Chou | Chien-Yu Chou and Jun Nishimura | Monte Carlo studies of quantum cosmology by the generalized Lefschetz
thimble method | 36 pages, 8 figures (v2) references added | null | null | KEK-TH-2640 | gr-qc hep-lat hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | Quantum cosmology aims at elucidating the beginning of our Universe. Back in
early 80's, Vilenkin and Hartle-Hawking put forward the "tunneling from
nothing" and "no boundary" proposals. Recently there has been renewed interest
in this subject from the viewpoint of defining the oscillating path integral
for Lorentzia... | [
{
"created": "Thu, 25 Jul 2024 02:53:21 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Aug 2024 20:20:55 GMT",
"version": "v2"
}
] | 2024-08-06 | [
[
"Chou",
"Chien-Yu",
""
],
[
"Nishimura",
"Jun",
""
]
] | Quantum cosmology aims at elucidating the beginning of our Universe. Back in early 80's, Vilenkin and Hartle-Hawking put forward the "tunneling from nothing" and "no boundary" proposals. Recently there has been renewed interest in this subject from the viewpoint of defining the oscillating path integral for Lorentzian ... |
2111.13913 | Gargi Biswas | Gargi Biswas and B Modak | Cosmic scenario of early Universe in context of Euclidean wormhole in
dilatonic Einstein Gauss Bonnet gravity | 16 pages, 13 figures . Currently under peer-review in Modern Physics
Letters A | null | 10.1142/S0217732322500833 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We present some wormhole configurations using analytic and numerical
solutions of the Euclidean field equations considering Einstein Gauss Bonnet
dilaton coupled interaction in the Robertson Walker metric. Analytic solutions
invoking slow-roll type approximation for some potentials yield identical
wormholes in the ea... | [
{
"created": "Sat, 27 Nov 2021 14:45:24 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Feb 2022 16:45:16 GMT",
"version": "v2"
}
] | 2022-06-22 | [
[
"Biswas",
"Gargi",
""
],
[
"Modak",
"B",
""
]
] | We present some wormhole configurations using analytic and numerical solutions of the Euclidean field equations considering Einstein Gauss Bonnet dilaton coupled interaction in the Robertson Walker metric. Analytic solutions invoking slow-roll type approximation for some potentials yield identical wormholes in the earl... |
0807.3398 | Morteza Mohseni | Morteza Mohseni | Torsion-induced spin precession | latex, 4 eps figures | Eur.Phys.J.C56:607-612,2008 | 10.1140/epjc/s10052-008-0693-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the motion of a spinning test particle in a spatially-flat
FRW-type space-time in the framework of the Einstein-Cartan theory. The
space-time has a torsion arising from a spinning fluid filling the space-time.
We show that for spinning particles with nonzero transverse spin components,
the torsion indu... | [
{
"created": "Tue, 22 Jul 2008 06:38:48 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Mohseni",
"Morteza",
""
]
] | We investigate the motion of a spinning test particle in a spatially-flat FRW-type space-time in the framework of the Einstein-Cartan theory. The space-time has a torsion arising from a spinning fluid filling the space-time. We show that for spinning particles with nonzero transverse spin components, the torsion induce... |
1005.5679 | Yousef Bisabr | Yousef Bisabr | $f(R)$ Gravity and Crossing the Phantom Divide Barrier | 13 Pages, 9 figures. To appear in Physics Letters B | Phys.Lett.B690:456-461,2010 | 10.1016/j.physletb.2010.05.080 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The $f(R)$ gravity models formulated in Einstein conformal frame are
equivalent to Einstein gravity together with a minimally coupled scalar field.
We shall explore phantom behavior of $f(R)$ models in this frame and compare
the results with those of the usual notion of phantom scalar field.
| [
{
"created": "Mon, 31 May 2010 12:51:25 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Jun 2010 05:41:12 GMT",
"version": "v2"
}
] | 2014-11-21 | [
[
"Bisabr",
"Yousef",
""
]
] | The $f(R)$ gravity models formulated in Einstein conformal frame are equivalent to Einstein gravity together with a minimally coupled scalar field. We shall explore phantom behavior of $f(R)$ models in this frame and compare the results with those of the usual notion of phantom scalar field. |
1707.06637 | Cecilia Bejarano | Cecilia Bejarano, Rafael Ferraro, Mar\'ia Jos\'e Guzm\'an | McVittie solution in f(T) gravity | 9 pages. Minor improvements. Published version | Eur. Phys. J. C (2017) 77: 825 | 10.1140/epjc/s10052-017-5394-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that McVittie geometry, which describes a black hole embedded in a
FLRW universe, not only solves Einstein equations but also remains as a
non-deformable solution of f(T) gravity. This search for GR solutions that
survive in f(T) gravity is facilitated by a null tetrad approach. We also show
that flat FLRW ge... | [
{
"created": "Thu, 20 Jul 2017 17:55:00 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Jul 2017 20:30:56 GMT",
"version": "v2"
},
{
"created": "Fri, 5 Jan 2018 21:51:36 GMT",
"version": "v3"
}
] | 2018-01-09 | [
[
"Bejarano",
"Cecilia",
""
],
[
"Ferraro",
"Rafael",
""
],
[
"Guzmán",
"María José",
""
]
] | We show that McVittie geometry, which describes a black hole embedded in a FLRW universe, not only solves Einstein equations but also remains as a non-deformable solution of f(T) gravity. This search for GR solutions that survive in f(T) gravity is facilitated by a null tetrad approach. We also show that flat FLRW geom... |
gr-qc/0403045 | Haret Rosu | H.C. Rosu, R. Lopez-Sandoval | Barotropic FRW cosmologies with a Dirac-like parameter | 7 pages, 4 figures, accepted at MPLA | Mod.Phys.Lett. A19 (2004) 1529-1535 | 10.1142/S0217732304013763 | null | gr-qc | null | Using the known connection between Schroedinger-like equations and Dirac-like
equations in the supersymmetric context, we discuss an extension of FRW
barotropic cosmologies in which a Dirac mass-like parameter is introduced. New
Hubble cosmological parameters H_K(eta) depending on the Dirac-like parameter
are plotted... | [
{
"created": "Thu, 11 Mar 2004 05:56:14 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Rosu",
"H. C.",
""
],
[
"Lopez-Sandoval",
"R.",
""
]
] | Using the known connection between Schroedinger-like equations and Dirac-like equations in the supersymmetric context, we discuss an extension of FRW barotropic cosmologies in which a Dirac mass-like parameter is introduced. New Hubble cosmological parameters H_K(eta) depending on the Dirac-like parameter are plotted a... |
gr-qc/9903004 | Jean-Philippe Uzan | Jean-Philippe Uzan (Departement de Physique Theorique, Universite de
Geneve) | Cosmological scaling solutions of non-minimally coupled scalar fields | 14 pages, Revtex, accepted for publication in Phys. Rev. D | Phys.Rev. D59 (1999) 123510 | 10.1103/PhysRevD.59.123510 | UGVA-DPT 1998/12-1022 | gr-qc | null | We study the existence and stability of cosmological scaling solutions of a
non-minimally coupled scalar field evolving in either an exponential or inverse
power law potential. We show that for inverse power law potentials there exist
scaling solutions the stability of which does not depend on the coupling
constant $... | [
{
"created": "Mon, 1 Mar 1999 16:31:00 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Uzan",
"Jean-Philippe",
"",
"Departement de Physique Theorique, Universite de\n Geneve"
]
] | We study the existence and stability of cosmological scaling solutions of a non-minimally coupled scalar field evolving in either an exponential or inverse power law potential. We show that for inverse power law potentials there exist scaling solutions the stability of which does not depend on the coupling constant $\x... |
2105.07521 | Stephen Adler | Stephen L. Adler | Covariance Group for Null Geodesic Expansion Calculations, and its
Application to the Apparent Horizon | Latex, 6 pages | Int. Journal of Modern Physics D, Vol. 30, No. 14, 2142023 (2021) | 10.1142/S0218271821420232 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the recipe for computing the expansions $\theta_\ell$ and
$\theta_n$ of outgoing and ingoing null geodesics normal to a surface admits a
covariance group with nonconstant scalar $\kappa(x)$, corresponding to the
mapping $\theta_\ell \to \kappa \theta_\ell$, $\theta_n \to \kappa^{-1}
\theta_n$. Under this... | [
{
"created": "Sun, 16 May 2021 21:41:19 GMT",
"version": "v1"
}
] | 2022-01-11 | [
[
"Adler",
"Stephen L.",
""
]
] | We show that the recipe for computing the expansions $\theta_\ell$ and $\theta_n$ of outgoing and ingoing null geodesics normal to a surface admits a covariance group with nonconstant scalar $\kappa(x)$, corresponding to the mapping $\theta_\ell \to \kappa \theta_\ell$, $\theta_n \to \kappa^{-1} \theta_n$. Under this m... |
gr-qc/0607067 | Hamid Reza Sepangi | M. Heydari-Fard, M. Shirazi, S. Jalalzadeh and H. R. Sepangi | Accelerating universe in brane gravity with a confining potential | 10 pages, 2 figures, to appear in Phys. Lett. B | Phys.Lett.B640:1-6,2006 | 10.1016/j.physletb.2006.07.020 | null | gr-qc hep-th | null | We construct the Einstein field equations on a 4-dimensional brane embedded
in an $m$-dimensional bulk where the matter fields are confined to the brane by
means of a confining potential. As a result, an extra term in the Friedmann
equation in a $m$-dimensional bulk appears that may be interpreted as the
X-matter, pr... | [
{
"created": "Tue, 18 Jul 2006 07:35:52 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Apr 2007 13:48:54 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Apr 2007 13:31:00 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Heydari-Fard",
"M.",
""
],
[
"Shirazi",
"M.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | We construct the Einstein field equations on a 4-dimensional brane embedded in an $m$-dimensional bulk where the matter fields are confined to the brane by means of a confining potential. As a result, an extra term in the Friedmann equation in a $m$-dimensional bulk appears that may be interpreted as the X-matter, prov... |
2111.08305 | Soham Bhattacharyya | Soham Bhattacharyya | Two body dynamics in a quadratic modification of general relativity | 24 pages. Version as accepted as part of the sixteenth Marcel
Grossmann conference proceeding | null | 10.1142/9789811269776_0069 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | It is shown in this study that deviations from the Einstein-Hilbert action at
the quadratic level using a proper analyses and suitable dynamical variables
lead to a tiny modification to the post-Newtonian equations of motion, and
non-GR-like behavior at very short length scales.
| [
{
"created": "Tue, 16 Nov 2021 08:58:36 GMT",
"version": "v1"
}
] | 2023-08-17 | [
[
"Bhattacharyya",
"Soham",
""
]
] | It is shown in this study that deviations from the Einstein-Hilbert action at the quadratic level using a proper analyses and suitable dynamical variables lead to a tiny modification to the post-Newtonian equations of motion, and non-GR-like behavior at very short length scales. |
1006.0362 | Victor Berezin | Victor Berezin | Classical analog of quantum Schwarzschild black hole: local vs global,
and the mystery of log(3) | 20 pp, no figures, preprint IHES/P/10/15, submitted to Classical and
Quantum Gravity | Int.J.Mod.Phys.A26:161-178,2011 | 10.1142/S0217751X11051135 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The model is built in which the main global properties of classical and
quasi-classical black holes become local. These are the event horizon,
"no-hair", temperature and entropy. Our construction is based on the features
of a quantum collapse, discovered when studying some quantum black hole models.
But our model is ... | [
{
"created": "Wed, 2 Jun 2010 12:56:04 GMT",
"version": "v1"
}
] | 2011-01-20 | [
[
"Berezin",
"Victor",
""
]
] | The model is built in which the main global properties of classical and quasi-classical black holes become local. These are the event horizon, "no-hair", temperature and entropy. Our construction is based on the features of a quantum collapse, discovered when studying some quantum black hole models. But our model is pu... |
gr-qc/9211022 | null | Hideo Kodama | Quantum Gravity by the Complex Canonical Formulation | 104 pages | Int.J.Mod.Phys.D1:439-524,1992 | 10.1142/S0218271892000240 | KUCP0048 | gr-qc | null | The basic features of the complex canonical formulation of general relativity
and the recent developments in the quantum gravity program based on it are
reviewed. The exposition is intended to be complementary to the review articles
available already and some original arguments are included. In particular the
convent... | [
{
"created": "Wed, 18 Nov 1992 08:33:18 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Kodama",
"Hideo",
""
]
] | The basic features of the complex canonical formulation of general relativity and the recent developments in the quantum gravity program based on it are reviewed. The exposition is intended to be complementary to the review articles available already and some original arguments are included. In particular the conventio... |
gr-qc/9510059 | Bronnikov Kirill Alexandrovich | Sergey S. Kokarev | Multidimensional generalization of Kasner solution | 9 pages, LaTeX | Grav.Cosmol. 2 (1996) 321-324 | null | RGS-VNIIMS-007/95 | gr-qc | null | Full generalization of Kasner metric for the case of $n+1$ dimensions and
$m\le n+1$ essential variables is obtained. Any solution is defined by the
corresponding constant matrix of Kasner parameters. This parameters form in
euclidian space Casner hyperspheres and are connected by additional conditions.
General prope... | [
{
"created": "Fri, 27 Oct 1995 20:30:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kokarev",
"Sergey S.",
""
]
] | Full generalization of Kasner metric for the case of $n+1$ dimensions and $m\le n+1$ essential variables is obtained. Any solution is defined by the corresponding constant matrix of Kasner parameters. This parameters form in euclidian space Casner hyperspheres and are connected by additional conditions. General propert... |
gr-qc/9908042 | Olaf Richter | C. Klein, O. Richter | Exact Relativistic Gravitational Field of a Stationary Counterrotating
Dust Disk | 10 pages, 2 figures, uses PSTricks-package; to appear in Phys. Rev.
Lett | Phys.Rev.Lett. 83 (1999) 2884-2887 | 10.1103/PhysRevLett.83.2884 | LMU-TPW 99-10 | gr-qc | null | Disks of collisionless particles are important models for certain galaxies
and accretion disks in astrophysics. We present here a solution to the
stationary axisymmetric Einstein equations which represents an infinitesimally
thin dust disk consisting of two streams of particles circulating with constant
angular veloc... | [
{
"created": "Fri, 13 Aug 1999 09:16:29 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Klein",
"C.",
""
],
[
"Richter",
"O.",
""
]
] | Disks of collisionless particles are important models for certain galaxies and accretion disks in astrophysics. We present here a solution to the stationary axisymmetric Einstein equations which represents an infinitesimally thin dust disk consisting of two streams of particles circulating with constant angular velocit... |
1509.05990 | Mahdi Kord Zangeneh | M. Kord Zangeneh, M. H. Dehghani and A. Sheykhi | Thermodynamics of topological black holes in Brans-Dicke gravity with a
power-law Maxwell field | 10 pages (two columns format), 10 figures, some references added,
titles of references added | Phys. Rev. D 92, 104035 (2015) | 10.1103/PhysRevD.92.104035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we present a new class of higher dimensional exact topological
black hole solutions of the Brans-Dicke theory in the presence of a power-law
Maxwell field as the matter source. For this aim, we introduce a conformal
transformation which transforms the Einstein-dilaton-power-law Maxwell gravity
Lagrangi... | [
{
"created": "Sun, 20 Sep 2015 10:05:46 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Nov 2015 20:52:19 GMT",
"version": "v2"
}
] | 2015-11-23 | [
[
"Zangeneh",
"M. Kord",
""
],
[
"Dehghani",
"M. H.",
""
],
[
"Sheykhi",
"A.",
""
]
] | In this paper, we present a new class of higher dimensional exact topological black hole solutions of the Brans-Dicke theory in the presence of a power-law Maxwell field as the matter source. For this aim, we introduce a conformal transformation which transforms the Einstein-dilaton-power-law Maxwell gravity Lagrangian... |
2307.04800 | Alejandro Jenkins | Robert Alicki, Gabriela Barenboim and Alejandro Jenkins | Quantum thermodynamics of de Sitter space | 14 pages + Appendix (3 pages). v3: added discussion of relation to
other approaches to thermal physics in dS, references improved, typos fixed.
To appear in PRD | Phys. Rev. D 108, 123530 (2023) | 10.1103/PhysRevD.108.123530 | IFIC/23-31 | gr-qc hep-ph hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the local physics of an open quantum system embedded in an
expanding three-dimensional space $\mathbf x$, evolving in cosmological time
$t$, weakly coupled to a massless quantum field. We derive the corresponding
Markovian master equation for the system's nonunitary evolution and show that,
for a de Sitte... | [
{
"created": "Mon, 10 Jul 2023 18:00:09 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Jul 2023 15:23:59 GMT",
"version": "v2"
},
{
"created": "Tue, 12 Dec 2023 15:42:23 GMT",
"version": "v3"
}
] | 2023-12-22 | [
[
"Alicki",
"Robert",
""
],
[
"Barenboim",
"Gabriela",
""
],
[
"Jenkins",
"Alejandro",
""
]
] | We consider the local physics of an open quantum system embedded in an expanding three-dimensional space $\mathbf x$, evolving in cosmological time $t$, weakly coupled to a massless quantum field. We derive the corresponding Markovian master equation for the system's nonunitary evolution and show that, for a de Sitter ... |
gr-qc/9512007 | Hans-Juergen Schmidt | Hans - Juergen Schmidt | Consequences of the noncompactness of the Lorentz group | 7 pages, latex, no figures | Int.J.Theor.Phys. 37 (1998) 691-696 | null | Potsdam/Math 95/09 | gr-qc | null | The following four statements have been proven decades ago already, but they
continue to induce a strange feeling:
- All curvature invariants of a gravitational wave vanish - in spite of the
fact that it represents a nonflat spacetime.
- The eigennullframe components of the curvature tensor (the Cartan
''scalars'... | [
{
"created": "Wed, 29 Nov 1995 17:16:17 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Schmidt",
"Hans - Juergen",
""
]
] | The following four statements have been proven decades ago already, but they continue to induce a strange feeling: - All curvature invariants of a gravitational wave vanish - in spite of the fact that it represents a nonflat spacetime. - The eigennullframe components of the curvature tensor (the Cartan ''scalars'') do ... |
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