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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1405.5535 | T. Padmanabhan | T. Padmanabhan | What drives the time evolution of the spacetime geometry? | Essay selected for the Third Award in the Gravity Research Foundation
Essay Contest, 2014 (with minor editing); for more details, see
arXiv:1312.3253 | null | 10.1142/S021827181441003X | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I show that in a general, evolving spacetime, the rate of change of
gravitational momentum is related to the difference between the number of
degrees of freedom in the bulk and the boundary of a region. This expresses the
gravitational field equation in the thermodynamic language which is the natural
description, if ... | [
{
"created": "Wed, 21 May 2014 20:00:05 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Padmanabhan",
"T.",
""
]
] | I show that in a general, evolving spacetime, the rate of change of gravitational momentum is related to the difference between the number of degrees of freedom in the bulk and the boundary of a region. This expresses the gravitational field equation in the thermodynamic language which is the natural description, if gr... |
gr-qc/9912086 | Lawrence C. Shepley | J.M. Pons, D.C. Salisbury, L.C. Shepley | Gauge Transformations in Einstein-Yang-Mills Theories | Submitted to J. Math. Phys. - 9 pages | J.Math.Phys. 41 (2000) 5557-5571 | 10.1063/1.533425 | null | gr-qc | null | We discuss the relation between spacetime diffeomorphisms and gauge
transformations in theories of the Yang-Mills type coupled with Einstein's
General Relativity. We show that local symmetries of the Hamiltonian and
Lagrangian formalisms of these generally covariant gauge systems are equivalent
when gauge transformat... | [
{
"created": "Mon, 20 Dec 1999 22:46:52 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Pons",
"J. M.",
""
],
[
"Salisbury",
"D. C.",
""
],
[
"Shepley",
"L. C.",
""
]
] | We discuss the relation between spacetime diffeomorphisms and gauge transformations in theories of the Yang-Mills type coupled with Einstein's General Relativity. We show that local symmetries of the Hamiltonian and Lagrangian formalisms of these generally covariant gauge systems are equivalent when gauge transformatio... |
1011.6257 | Bogus{\l}aw Broda | Bogus{\l}aw Broda | One-loop quantum gravity repulsion in the early Universe | 8 pages, accepted version, dedicated to Jakub Rembielinski on the
occasion of his 65th birthday | Phys.Rev.Lett.106:101303,2011 | 10.1103/PhysRevLett.106.101303 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Perturbative quantum gravity formalism is applied to compute the lowest order
corrections to the classical spatially flat cosmological FLRW solution (for the
radiation). The presented approach is analogous to the approach applied to
compute quantum corrections to the Coulomb potential in electrodynamics, or
rather to... | [
{
"created": "Mon, 29 Nov 2010 15:21:39 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Dec 2010 11:10:11 GMT",
"version": "v2"
},
{
"created": "Tue, 15 Feb 2011 10:23:32 GMT",
"version": "v3"
},
{
"created": "Tue, 15 Mar 2011 08:30:52 GMT",
"version": "v4"
}
] | 2011-03-23 | [
[
"Broda",
"Bogusław",
""
]
] | Perturbative quantum gravity formalism is applied to compute the lowest order corrections to the classical spatially flat cosmological FLRW solution (for the radiation). The presented approach is analogous to the approach applied to compute quantum corrections to the Coulomb potential in electrodynamics, or rather to t... |
gr-qc/0101082 | Roman R. Zapatrin | Ioannis Raptis | Non-Commutative Topology for Curved Quantum Causality | 65 pages, LaTeX2e,typos corrected | null | null | null | gr-qc | null | A quantum causal topology is presented. This is modeled after a
non-commutative scheme type of theory for the curved finitary spacetime sheaves
of the non-abelian incidence Rota algebras that represent `gravitational
quantum causal sets'. The finitary spacetime primitive algebra scheme
structures for quantum causal s... | [
{
"created": "Fri, 19 Jan 2001 13:52:39 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Feb 2001 10:29:29 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Raptis",
"Ioannis",
""
]
] | A quantum causal topology is presented. This is modeled after a non-commutative scheme type of theory for the curved finitary spacetime sheaves of the non-abelian incidence Rota algebras that represent `gravitational quantum causal sets'. The finitary spacetime primitive algebra scheme structures for quantum causal set... |
1005.4547 | Michael Bebronne | Michael V. Bebronne | Quasi-linear static solutions in massive gravity | null | Phys.Rev.D82:024020,2010 | 10.1103/PhysRevD.82.024020 | ULB-TH/10-17 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The static vacuum spherically symmetric solutions of massive gravity theories
possess two integration constant: the mass M and a scalar charge S. The
presence of this scalar charge reflects the modification of the gravitational
interaction as compared to General Relativity. Surprisingly, these solutions
are non-linea... | [
{
"created": "Tue, 25 May 2010 11:58:11 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jul 2010 07:39:29 GMT",
"version": "v2"
}
] | 2014-11-21 | [
[
"Bebronne",
"Michael V.",
""
]
] | The static vacuum spherically symmetric solutions of massive gravity theories possess two integration constant: the mass M and a scalar charge S. The presence of this scalar charge reflects the modification of the gravitational interaction as compared to General Relativity. Surprisingly, these solutions are non-linear ... |
1103.4498 | Kirill Krasnov | Kirill Krasnov | New Action Principle for General Relativity | 4 pages, no figures | Phys.Rev.Lett.106:251103,2011 | 10.1103/PhysRevLett.106.251103 | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General Relativity can be reformulated as a diffeomorphism invariant SU(2)
gauge theory. A new action principle for this "pure connection" formulation of
GR is described.
| [
{
"created": "Wed, 23 Mar 2011 11:56:51 GMT",
"version": "v1"
}
] | 2011-07-28 | [
[
"Krasnov",
"Kirill",
""
]
] | General Relativity can be reformulated as a diffeomorphism invariant SU(2) gauge theory. A new action principle for this "pure connection" formulation of GR is described. |
2002.10496 | Mohsen Khodadi | Mohsen Khodadi, Alireza Talebian, Hassan Firouzjahi | Black Hole Superradiance in f(R) Gravities | 24 pages, 4 captioned figures, 2 tables. v2:discussion improved,
references added. v3:figures revised | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the superradiance amplification factor (SAF) for a charged massive
scalar wave scattering off small and slowly rotating Kerr-Newman black holes in
$f(R)$ gravity immersed in asymptotically flat and de-Sitter spacetimes. We
employ the \emph{``analytical asymptotic matching''} approximation technique
which is ... | [
{
"created": "Mon, 24 Feb 2020 19:25:23 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Aug 2020 13:29:48 GMT",
"version": "v2"
},
{
"created": "Wed, 30 Dec 2020 11:32:09 GMT",
"version": "v3"
}
] | 2021-01-01 | [
[
"Khodadi",
"Mohsen",
""
],
[
"Talebian",
"Alireza",
""
],
[
"Firouzjahi",
"Hassan",
""
]
] | We study the superradiance amplification factor (SAF) for a charged massive scalar wave scattering off small and slowly rotating Kerr-Newman black holes in $f(R)$ gravity immersed in asymptotically flat and de-Sitter spacetimes. We employ the \emph{``analytical asymptotic matching''} approximation technique which is va... |
1101.5792 | Leonardo Modesto | Emanuele Alesci and Leonardo Modesto | Particle Creation by Loop Black Holes | 14 pages, 6 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the black hole particle production in a regular spacetime metric
obtained in a minisuperspace approach to loop quantum gravity. In different
previous papers the static solution was obtained and shown to be
singularity-free and self-dual. In this paper expanding a previous study of the
black hole dynamics we ... | [
{
"created": "Sun, 30 Jan 2011 17:52:44 GMT",
"version": "v1"
}
] | 2011-02-01 | [
[
"Alesci",
"Emanuele",
""
],
[
"Modesto",
"Leonardo",
""
]
] | We study the black hole particle production in a regular spacetime metric obtained in a minisuperspace approach to loop quantum gravity. In different previous papers the static solution was obtained and shown to be singularity-free and self-dual. In this paper expanding a previous study of the black hole dynamics we re... |
1308.6426 | Graeme Gossel | G. H. Gossel, J. C. Berengut, V. V. Flambaum | Resonance scattering and the passage to bound states in the field of
near-black-hole objects | 8 pages, 5 figures | Int. J. Mod. Phys. D 23, 1450089 (2014) | 10.1142/S0218271814500898 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the spectrum of a massive scalar particle interacting with the
strong gravitational field of a static, spherically symmetric object which is
not quite massive enough to be a black hole. As was found in the case of
massless particles, there exists a dense spectrum of long lived resonances
(meta-stable state... | [
{
"created": "Thu, 29 Aug 2013 10:46:08 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Dec 2013 23:04:07 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Nov 2014 08:41:39 GMT",
"version": "v3"
}
] | 2014-11-20 | [
[
"Gossel",
"G. H.",
""
],
[
"Berengut",
"J. C.",
""
],
[
"Flambaum",
"V. V.",
""
]
] | We examine the spectrum of a massive scalar particle interacting with the strong gravitational field of a static, spherically symmetric object which is not quite massive enough to be a black hole. As was found in the case of massless particles, there exists a dense spectrum of long lived resonances (meta-stable states)... |
1712.09530 | Kourosh Nozari | K. Nozari and S. Shafizadeh | Realization of blue spectrum in generalized Galileon super-inflation
models | 15 pages, 6 figures, revised version | Int. J. Mod. Phys. D Vol. 26, No. 3 (2017) 1750016 | 10.1142/S021827181750016X | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the spirit of Galileon inflation and by considering some sorts of
non-canonical kinetic terms in the action, we realize a stage of
super-inflation leading to a blue-tilted tensor perturbation. We show also that
addition of Galileon-like term to the action leads to avoidance of ghost
instabilities in this setup.
| [
{
"created": "Wed, 27 Dec 2017 09:24:04 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jan 2018 07:41:20 GMT",
"version": "v2"
}
] | 2018-01-10 | [
[
"Nozari",
"K.",
""
],
[
"Shafizadeh",
"S.",
""
]
] | In the spirit of Galileon inflation and by considering some sorts of non-canonical kinetic terms in the action, we realize a stage of super-inflation leading to a blue-tilted tensor perturbation. We show also that addition of Galileon-like term to the action leads to avoidance of ghost instabilities in this setup. |
gr-qc/9404027 | Samura Toshiharu | Koichi HAYASHI and Toshiharu SAMURA | Gravitational Shock Waves for Schwarzschild and Kerr Black Holes | 24 Pages, KOBE--FHD--93--03, {\LaTeX} | Phys.Rev.D50:3666-3675,1994 | 10.1103/PhysRevD.50.3666 | null | gr-qc | null | The metrics of gravitational shock waves for a Schwarzschild black hole in
ordinary coordinates and for a Kerr black hole in Boyer-Lindquist coordinates
are derived. The Kerr metric is discussed for two cases: the case of a Kerr
black hole moving parallel to the rotational axis, and moving perpendicular to
the rotati... | [
{
"created": "Wed, 13 Apr 1994 14:13:53 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"HAYASHI",
"Koichi",
""
],
[
"SAMURA",
"Toshiharu",
""
]
] | The metrics of gravitational shock waves for a Schwarzschild black hole in ordinary coordinates and for a Kerr black hole in Boyer-Lindquist coordinates are derived. The Kerr metric is discussed for two cases: the case of a Kerr black hole moving parallel to the rotational axis, and moving perpendicular to the rotation... |
1609.02245 | Tomohiro Nakama | Tomohiro Nakama, Teruaki Suyama and Jun'ichi Yokoyama | Supermassive black holes formed by direct collapse of inflationary
perturbations | 30 pages, 11 figures, accepted in PRD | Phys. Rev. D 94, 103522 (2016) | 10.1103/PhysRevD.94.103522 | RESCEU-28/16 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a mechanism of producing a new type of primordial perturbations
that collapse to primordial black holes whose mass can be as large as necessary
for them to grow to the supermassive black holes observed at high redshifts,
without contradicting COBE/FIRAS upper limits on cosmic microwave background
(CMB) spe... | [
{
"created": "Thu, 8 Sep 2016 02:20:14 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Nov 2016 23:26:13 GMT",
"version": "v2"
}
] | 2016-11-28 | [
[
"Nakama",
"Tomohiro",
""
],
[
"Suyama",
"Teruaki",
""
],
[
"Yokoyama",
"Jun'ichi",
""
]
] | We propose a mechanism of producing a new type of primordial perturbations that collapse to primordial black holes whose mass can be as large as necessary for them to grow to the supermassive black holes observed at high redshifts, without contradicting COBE/FIRAS upper limits on cosmic microwave background (CMB) spect... |
1511.07650 | A. N. Ivanov | A. N. Ivanov, M. Pitschmann, and M. Wellenzohn | Effective Low-Energy Gravitational Potential for Slow Fermions Coupled
to Linearised Massive Gravity | 13 pages, no figers, the paper is accepted for publication in
Physical Review D | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the Dirac equation for slow fermions coupled to linearised massive
gravity above the Minkowski background and derive the effective low-energy
gravitational potential. The obtained results can be used in terrestrial
laboratories for the detection of gravitational waves and fluxes of massive
gravitons emitte... | [
{
"created": "Tue, 24 Nov 2015 11:15:18 GMT",
"version": "v1"
}
] | 2015-11-25 | [
[
"Ivanov",
"A. N.",
""
],
[
"Pitschmann",
"M.",
""
],
[
"Wellenzohn",
"M.",
""
]
] | We analyse the Dirac equation for slow fermions coupled to linearised massive gravity above the Minkowski background and derive the effective low-energy gravitational potential. The obtained results can be used in terrestrial laboratories for the detection of gravitational waves and fluxes of massive gravitons emitted ... |
2404.10627 | Supakchai Ponglertsakul | Piyali Bhar and Dhruba Jyoti Gogoi and Supakchai Ponglertsakul | Noncommutative black hole in de Rham-Gabadadze-Tolley like massive
gravity | 19 pages, 17 figures, 1 table | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We examine the behavior of non-commutative Schwarzschild black holes in the
context of massive gravity. According to the investigation, corresponding to a
minimal mass, the black hole can have two horizons, one horizon, or no horizon
at all. Our results imply the existence of a stable black hole remnant, whose
mass c... | [
{
"created": "Tue, 16 Apr 2024 14:55:31 GMT",
"version": "v1"
}
] | 2024-04-17 | [
[
"Bhar",
"Piyali",
""
],
[
"Gogoi",
"Dhruba Jyoti",
""
],
[
"Ponglertsakul",
"Supakchai",
""
]
] | We examine the behavior of non-commutative Schwarzschild black holes in the context of massive gravity. According to the investigation, corresponding to a minimal mass, the black hole can have two horizons, one horizon, or no horizon at all. Our results imply the existence of a stable black hole remnant, whose mass can... |
1710.06918 | Salwa Alsaleh | Mir Faizal, Amani Ashour, Mohammad Alcheikh, Lina Al Asfar, Salwa
Alsaleh and Ahmed Mahroussah | Quantum Fluctuations from Thermal Fluctuations in Jacobson Formalism | 9 pages, 3 figues. Publsihed in EPJC, author's affiliation corrected | Eur. Phys. J. C (2017) 77:608 | 10.1140/epjc/s10052-017-5194-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the Jacobson formalism general relativity is obtained from thermodynamics.
This is done by using the Bekenstein-Hawking entropy-area relation. However, as
a black holes will gets smaller, its temperature will increase. This will cause
the thermal fluctuations to also increase, and these will in turn correct the
Be... | [
{
"created": "Tue, 3 Oct 2017 20:52:27 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Apr 2018 17:33:59 GMT",
"version": "v2"
}
] | 2018-04-24 | [
[
"Faizal",
"Mir",
""
],
[
"Ashour",
"Amani",
""
],
[
"Alcheikh",
"Mohammad",
""
],
[
"Asfar",
"Lina Al",
""
],
[
"Alsaleh",
"Salwa",
""
],
[
"Mahroussah",
"Ahmed",
""
]
] | In the Jacobson formalism general relativity is obtained from thermodynamics. This is done by using the Bekenstein-Hawking entropy-area relation. However, as a black holes will gets smaller, its temperature will increase. This will cause the thermal fluctuations to also increase, and these will in turn correct the Beke... |
1503.06651 | Rituparno Goswami | M. D. Mkenyeleye, Rituparno Goswami, Sunil D. Maharaj | Is cosmic censorship restored in higher dimensions? | 7 pages, revtex4; Title changed, Matches the PRD version | Phys. Rev. D 92, 024041 (2015) | 10.1103/PhysRevD.92.024041 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we extend the analysis of gravitational collapse of generalised
Vaidya spacetimes to higher dimensions, in the context of the Cosmic Censorship
Conjecture. We present the sufficient conditions on the generalised Vaidya mass
function, that will generate a locally naked singular end state. Our analysis
he... | [
{
"created": "Mon, 23 Mar 2015 14:24:53 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jul 2015 10:46:21 GMT",
"version": "v2"
}
] | 2015-07-29 | [
[
"Mkenyeleye",
"M. D.",
""
],
[
"Goswami",
"Rituparno",
""
],
[
"Maharaj",
"Sunil D.",
""
]
] | In this paper we extend the analysis of gravitational collapse of generalised Vaidya spacetimes to higher dimensions, in the context of the Cosmic Censorship Conjecture. We present the sufficient conditions on the generalised Vaidya mass function, that will generate a locally naked singular end state. Our analysis here... |
1109.1961 | H Mohseni Sadjadi | H. Mohseni Sadjadi | On coincidence problem and attractor solutions in ELKO dark energy model | 8 pages. Accepeted by Gen. Rel. Grav | Gen. Rel. Grav. 44, 2329 (2012) | 10.1007/s10714-012-1392-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the critical points of a universe dominated by ELKO spinor field
dark energy and a barotropic matter without considering a specific potential or
interaction. The coincidence problem and attractor solutions are discussed at
late time, and it is shown that the coincidence problem can not be solved in
this mode... | [
{
"created": "Fri, 9 Sep 2011 10:41:48 GMT",
"version": "v1"
},
{
"created": "Mon, 28 May 2012 10:39:54 GMT",
"version": "v2"
}
] | 2015-05-30 | [
[
"Sadjadi",
"H. Mohseni",
""
]
] | We study the critical points of a universe dominated by ELKO spinor field dark energy and a barotropic matter without considering a specific potential or interaction. The coincidence problem and attractor solutions are discussed at late time, and it is shown that the coincidence problem can not be solved in this model. |
2406.10062 | Hernando Quevedo | Jose M. Ladino, Carlos E. Romero-Figueroa, and Hernando Quevedo | Phase transitions, shadows, and microstructure of
Reissner-Nordstr\"om-Anti-de-Sitter black holes from a geometrothermodynamic
perspective | References and comments added, Typos corrected | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the thermodynamic properties of the Reissner-Nordstr\"om black hole
with cosmological constant, expressed in terms of the curvature radius, by
using the approach of shadow thermodynamics and the formalism of
geometrothermodynamics. We derive explicit expressions for the shadow radius in
terms of the horizon,... | [
{
"created": "Fri, 14 Jun 2024 14:20:55 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Jun 2024 20:35:24 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Jul 2024 05:14:59 GMT",
"version": "v3"
}
] | 2024-07-03 | [
[
"Ladino",
"Jose M.",
""
],
[
"Romero-Figueroa",
"Carlos E.",
""
],
[
"Quevedo",
"Hernando",
""
]
] | We study the thermodynamic properties of the Reissner-Nordstr\"om black hole with cosmological constant, expressed in terms of the curvature radius, by using the approach of shadow thermodynamics and the formalism of geometrothermodynamics. We derive explicit expressions for the shadow radius in terms of the horizon, p... |
1412.2046 | Stephen Barnett | Stephen M. Barnett | Gravitational Field Tensor | 4 pages, 0 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a tensorial relative of the familiar affine connection and argue
that it should be regarded as the gravitational field tensor. Remarkably, the
Lagrangian density expressed in terms of this tensor has a simple form, which
depends only on the metric and its first derivatives and, moreover, is a true
scalar q... | [
{
"created": "Fri, 5 Dec 2014 16:10:22 GMT",
"version": "v1"
}
] | 2014-12-08 | [
[
"Barnett",
"Stephen M.",
""
]
] | We present a tensorial relative of the familiar affine connection and argue that it should be regarded as the gravitational field tensor. Remarkably, the Lagrangian density expressed in terms of this tensor has a simple form, which depends only on the metric and its first derivatives and, moreover, is a true scalar qua... |
2304.01511 | Tayyab Naseer | M. Sharif, T. Naseer | Effects of Non-minimal Matter-geometry Coupling on Embedding Class-one
Anisotropic Solutions | 42 pages, 10 figures | Phys. Scr. 97(2022)055004 | 10.1088/1402-4896/ac5ed4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper investigates some particular anisotropic star models in
$f(\mathcal{R},\mathcal{T},\mathcal{Q})$ gravity, where
$\mathcal{Q}=\mathcal{R}_{\omega\alpha}\mathcal{T}^{\omega\alpha}$. We adopt a
standard model
$f(\mathcal{R},\mathcal{T},\mathcal{Q})=\mathcal{R}+\varpi\mathcal{Q}$, where
$\varpi$ indicates a co... | [
{
"created": "Tue, 4 Apr 2023 03:45:26 GMT",
"version": "v1"
}
] | 2023-04-05 | [
[
"Sharif",
"M.",
""
],
[
"Naseer",
"T.",
""
]
] | This paper investigates some particular anisotropic star models in $f(\mathcal{R},\mathcal{T},\mathcal{Q})$ gravity, where $\mathcal{Q}=\mathcal{R}_{\omega\alpha}\mathcal{T}^{\omega\alpha}$. We adopt a standard model $f(\mathcal{R},\mathcal{T},\mathcal{Q})=\mathcal{R}+\varpi\mathcal{Q}$, where $\varpi$ indicates a coup... |
gr-qc/0011087 | Jose Geraldo Pereira | V. C. de Andrade, L. C. T. Guillen, J. G. Pereira | Teleparallel Gravity: An Overview | 10 pages, talk given at the IX Marcel Grossmann Meeting, Rome, Italy,
July/2000, to appear in (the electronic version of) the Proceedings | null | null | null | gr-qc | null | The fundamentals of the teleparallel equivalent of general relativity are
presented, and its main properties described. In particular, the field
equations, the definition of an energy--momentum density for the gravitational
field, the teleparallel version of the equivalence principle, and the dynamical
role played by... | [
{
"created": "Fri, 24 Nov 2000 11:26:53 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Andrade",
"V. C.",
""
],
[
"Guillen",
"L. C. T.",
""
],
[
"Pereira",
"J. G.",
""
]
] | The fundamentals of the teleparallel equivalent of general relativity are presented, and its main properties described. In particular, the field equations, the definition of an energy--momentum density for the gravitational field, the teleparallel version of the equivalence principle, and the dynamical role played by t... |
1511.06780 | Anzhong Wang | Bao-Fei Li, V. H. Satheeshkumar, and Anzhong Wang | Quantization of 2D Ho\v{r}ava gravity: non-projectable case | revtex4, no figures & tables. A program and New references are added.
Version to appear in PRD | Phys. Rev. D 93, 064043 (2016) | 10.1103/PhysRevD.93.064043 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quantization of two-dimensional Ho\v{r}ava theory of gravity without the
projectability condition is considered. Our study of the Hamiltonian structure
of the theory shows that there are two first-class and two second-class
constraints. Then, following Dirac we quantize the theory by first requiring
that the two ... | [
{
"created": "Fri, 20 Nov 2015 21:37:35 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Nov 2015 15:01:54 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Feb 2016 19:23:37 GMT",
"version": "v3"
}
] | 2016-03-22 | [
[
"Li",
"Bao-Fei",
""
],
[
"Satheeshkumar",
"V. H.",
""
],
[
"Wang",
"Anzhong",
""
]
] | The quantization of two-dimensional Ho\v{r}ava theory of gravity without the projectability condition is considered. Our study of the Hamiltonian structure of the theory shows that there are two first-class and two second-class constraints. Then, following Dirac we quantize the theory by first requiring that the two se... |
1111.5365 | Andrei Lebed G | A.G. Lebed | Is Gravitational Mass of a Composite Quantum Body Equivalent to its
Energy? | 4 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We define gravitational mass operator of a hydrogen atom in the
post-Newtonian approximation of the General Relativity and show that it does
not commute with energy operator. Nevertheless, the equivalence between the
expectation values of gravitational mass and energy is shown to survive for
stationary quantum states... | [
{
"created": "Fri, 18 Nov 2011 18:27:04 GMT",
"version": "v1"
}
] | 2011-11-24 | [
[
"Lebed",
"A. G.",
""
]
] | We define gravitational mass operator of a hydrogen atom in the post-Newtonian approximation of the General Relativity and show that it does not commute with energy operator. Nevertheless, the equivalence between the expectation values of gravitational mass and energy is shown to survive for stationary quantum states. ... |
gr-qc/0308018 | R. G. Vishwakarma | Abdussattar (Banaras Hindu University) | Cosmological Models Generalising Robertson-Walker Models | 15 pages, no figures, to appear in Int. J. Mod. Phys. D | Int.J.Mod.Phys. D12 (2003) 1603-1614 | 10.1142/S021827180300433X | null | gr-qc astro-ph hep-th | null | Considering the physical 3-space t = constant of the spacetime metrics as
spheroidal and pseudo spheroidal, cosmological models which are generalizations
of Robertson-Walker models are obtained. Specific forms of these general models
as solutions of Einstein's field equations are also discussed in the radiation-
and ... | [
{
"created": "Thu, 7 Aug 2003 09:35:17 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Abdussattar",
"",
"",
"Banaras Hindu University"
]
] | Considering the physical 3-space t = constant of the spacetime metrics as spheroidal and pseudo spheroidal, cosmological models which are generalizations of Robertson-Walker models are obtained. Specific forms of these general models as solutions of Einstein's field equations are also discussed in the radiation- and th... |
1304.0471 | Maaneli Derakhshani | Maaneli Derakhshani | Newtonian Semiclassical Gravity in the Ghirardi-Rimini-Weber Theory with
Matter Density Ontology | 23 pages, no figures. Significant revisions - expanded introduction
section, new sections added, several new references added. Submitted to Phys.
Lett. A | null | 10.1016/j.physleta.2014.02.005 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a Newtonian semiclassical gravity theory based on the GRW collapse
theory with matter density ontology (GRWm), which we term GRWmN. The theory is
proposed because, as we show, the standard Newtonian semiclassical gravity
theory based on the Schroedinger-Newton equations does not have a consistent
Born rule... | [
{
"created": "Fri, 29 Mar 2013 19:42:18 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Apr 2013 21:20:08 GMT",
"version": "v2"
},
{
"created": "Mon, 13 Jan 2014 21:27:02 GMT",
"version": "v3"
}
] | 2015-06-15 | [
[
"Derakhshani",
"Maaneli",
""
]
] | We propose a Newtonian semiclassical gravity theory based on the GRW collapse theory with matter density ontology (GRWm), which we term GRWmN. The theory is proposed because, as we show, the standard Newtonian semiclassical gravity theory based on the Schroedinger-Newton equations does not have a consistent Born rule p... |
2408.04494 | Wen-Cong Gan | Wen-Cong Gan, Anzhong Wang | A new quantization scheme of black holes in effective loop quantum
gravity | revtex4-2, 17 figures, and no tables; v2: typos corrected | null | null | null | gr-qc astro-ph.GA hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Loop quantum cosmology has achieved great successes, in which the
polymerization plays a crucial role. In particular, the phase-space-variable
dependent polymerization turns out to be the unique one that leads to
consistent quantization of the homogeneous and isotropic universe. However,
when applying the same scheme... | [
{
"created": "Thu, 8 Aug 2024 14:43:10 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Aug 2024 01:57:46 GMT",
"version": "v2"
}
] | 2024-08-12 | [
[
"Gan",
"Wen-Cong",
""
],
[
"Wang",
"Anzhong",
""
]
] | Loop quantum cosmology has achieved great successes, in which the polymerization plays a crucial role. In particular, the phase-space-variable dependent polymerization turns out to be the unique one that leads to consistent quantization of the homogeneous and isotropic universe. However, when applying the same scheme t... |
1607.03693 | Sourav Bhattacharya | Sourav Bhattacharya and Sumanta Chakraborty | Constraining some Horndeski gravity theories | v2, 14pp; title changed, added references and discussions; improved
presentation; accepted in PRD | Phys. Rev. D 95, 044037 (2017) | 10.1103/PhysRevD.95.044037 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss two spherically symmetric solutions admitted by the Horndeski (or
scalar tensor) theory in the context of solar system and astrophysical
scenarios. One of these solutions is derived for Einstein-Gauss-Bonnet gravity,
while the other originates from the coupling of the Gauss-Bonnet invariant with
a scalar f... | [
{
"created": "Wed, 13 Jul 2016 12:19:09 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Feb 2017 12:29:10 GMT",
"version": "v2"
}
] | 2017-02-28 | [
[
"Bhattacharya",
"Sourav",
""
],
[
"Chakraborty",
"Sumanta",
""
]
] | We discuss two spherically symmetric solutions admitted by the Horndeski (or scalar tensor) theory in the context of solar system and astrophysical scenarios. One of these solutions is derived for Einstein-Gauss-Bonnet gravity, while the other originates from the coupling of the Gauss-Bonnet invariant with a scalar fie... |
1304.3067 | Serguei Ossokine | Serguei Ossokine, Lawrence E. Kidder and Harald P. Pfeiffer | Precession-tracking coordinates for simulations of
compact-object-binaries | 11 pages, 7 figures, 1 table | null | 10.1103/PhysRevD.88.084031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Binary black hole simulations with black hole excision using spectral methods
require a coordinate transformation into a co-rotating coordinate system where
the black holes are essentially at rest. This paper presents and discusses two
coordinate transformations that are applicable to precessing binary systems,
one b... | [
{
"created": "Wed, 10 Apr 2013 19:48:48 GMT",
"version": "v1"
}
] | 2015-06-15 | [
[
"Ossokine",
"Serguei",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Pfeiffer",
"Harald P.",
""
]
] | Binary black hole simulations with black hole excision using spectral methods require a coordinate transformation into a co-rotating coordinate system where the black holes are essentially at rest. This paper presents and discusses two coordinate transformations that are applicable to precessing binary systems, one bas... |
2101.04166 | Mokdad Mokdad | Mokdad Mokdad | Conformal Scattering and the Goursat Problem for Dirac Fields in the
Interior of Charged Spherically Symmetric Black Holes | 13 pages, 2 figures | Reviews in Mathematical Physics Vol. 33 (2021) 2150037 | 10.1142/S0129055X21500379 | null | gr-qc math.AP | http://creativecommons.org/licenses/by/4.0/ | We construct a conformal scattering theory for Dirac fields in the interior
of a Reissner-Nordstr\"om-like black hole, between the black hole event horizon
and the Cauchy horizon. The main result is a resolution of the characteristic
Cauchy problem for the Dirac equation on the horizons by solving a system of
wave eq... | [
{
"created": "Mon, 11 Jan 2021 19:49:22 GMT",
"version": "v1"
}
] | 2022-01-04 | [
[
"Mokdad",
"Mokdad",
""
]
] | We construct a conformal scattering theory for Dirac fields in the interior of a Reissner-Nordstr\"om-like black hole, between the black hole event horizon and the Cauchy horizon. The main result is a resolution of the characteristic Cauchy problem for the Dirac equation on the horizons by solving a system of wave equa... |
1712.02596 | Xudong Meng | Xudong Meng, Ruihong Wang | Revisit on the thermodynamic stability of Ho\v{r}ava-Lifshitz black hole | 9 pages, 5 figures. Accepted by International Journal of Modern
Physics D | null | 10.1142/S0218271818500487 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the thermodynamic properties of the black hole derived in
Ho\v{r}ava-Lifshitz (HL) gravity without the detailed-balance condition. The
parameter $\Xi=\epsilon^2$ in the HL black hole plays the same role as that of
the electric charge in the RN-AdS black hole. By analogy, we treat the
parameter $\Xi$ as the t... | [
{
"created": "Thu, 7 Dec 2017 12:49:23 GMT",
"version": "v1"
}
] | 2018-03-28 | [
[
"Meng",
"Xudong",
""
],
[
"Wang",
"Ruihong",
""
]
] | We study the thermodynamic properties of the black hole derived in Ho\v{r}ava-Lifshitz (HL) gravity without the detailed-balance condition. The parameter $\Xi=\epsilon^2$ in the HL black hole plays the same role as that of the electric charge in the RN-AdS black hole. By analogy, we treat the parameter $\Xi$ as the the... |
1311.7110 | Carlos A. Batista da S. Filho | Carlos Batista | On the Pursuit of Generalizations for the Petrov Classification and the
Goldberg-Sachs Theorem | Thesis work, 145 pages. This thesis was published as a book by
Lambert Academic Publishing (2014). ISBN:978-3-659-52065-5 | null | null | null | gr-qc hep-th math.DG | http://creativecommons.org/licenses/by/3.0/ | The Petrov classification is an important algebraic classification for the
Weyl tensor valid in 4-dimensional space-times. In this thesis such
classification is generalized to manifolds of arbitrary dimension and
signature. This is accomplished by interpreting the Weyl tensor as a linear
operator on the bundle of p-f... | [
{
"created": "Wed, 27 Nov 2013 20:22:02 GMT",
"version": "v1"
},
{
"created": "Fri, 16 May 2014 12:52:19 GMT",
"version": "v2"
}
] | 2014-05-19 | [
[
"Batista",
"Carlos",
""
]
] | The Petrov classification is an important algebraic classification for the Weyl tensor valid in 4-dimensional space-times. In this thesis such classification is generalized to manifolds of arbitrary dimension and signature. This is accomplished by interpreting the Weyl tensor as a linear operator on the bundle of p-for... |
2205.10921 | Bin Guo | Bin Guo, Samir D. Mathur | Are there echoes of gravitational waves? | 13 pages, 2 figures, Essay awarded an Honorable Mention in the
Gravity Research Foundation 2022 Awards for Essays on Gravitation | null | 10.1142/S0218271822420093 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In several approaches to evading the information paradox, the semiclassical
black hole is replaced by an Exotic Compact Object (ECO). It has been
conjectured that gravitational waves emitted by the merger of ECOs can reflect
off the ECOs and produce a detectable `echo'. We argue that while a part of the
wave can inde... | [
{
"created": "Sun, 22 May 2022 20:08:19 GMT",
"version": "v1"
}
] | 2022-12-07 | [
[
"Guo",
"Bin",
""
],
[
"Mathur",
"Samir D.",
""
]
] | In several approaches to evading the information paradox, the semiclassical black hole is replaced by an Exotic Compact Object (ECO). It has been conjectured that gravitational waves emitted by the merger of ECOs can reflect off the ECOs and produce a detectable `echo'. We argue that while a part of the wave can indeed... |
gr-qc/0308046 | Burin Gumjudpai | Burin Gumjudpai (ICG Portsmouth) | Brane-cosmology dynamics with induced gravity | 14 pages, 25 eps figures, higher-resolution figures can be obtained
from the author. Minor corrections. To appear in Gen.Rel.Grav. 36 (2004) | Gen.Rel.Grav.36:747-766,2004 | 10.1023/B:GERG.0000016922.72972.67 | null | gr-qc astro-ph hep-ph hep-th | null | The Friedmann equations for a brane with induced gravity are analyzed and
compared with the standard general relativity and Randall-Sundrum cases.
Randall-Sundrum gravity modified the early universe dynamics, whereas induced
gravity changes the late universe evolution. The early and late time limits are
investigated.... | [
{
"created": "Thu, 14 Aug 2003 15:50:05 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Oct 2003 20:18:43 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Gumjudpai",
"Burin",
"",
"ICG Portsmouth"
]
] | The Friedmann equations for a brane with induced gravity are analyzed and compared with the standard general relativity and Randall-Sundrum cases. Randall-Sundrum gravity modified the early universe dynamics, whereas induced gravity changes the late universe evolution. The early and late time limits are investigated. I... |
1708.06627 | Zhongwen Feng | Zhong-Wen Feng and Shu-Zheng Yang | Thermodynamic phase transition of a black hole in rainbow gravity | 7 pages, 3 figures, accepted for publication in Physical Letter B.
arXiv admin note: substantial text overlap with arXiv:1608.06824 | Physics Letters B 772 (2017) 737-742 | 10.1016/j.physletb.2017.07.057 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this letter, using the rainbow functions that were proposed by Magueijo
and Smolin, we investigate the thermodynamics and the phase transition of
rainbow Schwarzschild black hole. First, we calculate the rainbow gravity
corrected Hawking temperature. From this modification, we then derive the local
temperature, fr... | [
{
"created": "Sun, 20 Aug 2017 01:17:00 GMT",
"version": "v1"
}
] | 2020-07-01 | [
[
"Feng",
"Zhong-Wen",
""
],
[
"Yang",
"Shu-Zheng",
""
]
] | In this letter, using the rainbow functions that were proposed by Magueijo and Smolin, we investigate the thermodynamics and the phase transition of rainbow Schwarzschild black hole. First, we calculate the rainbow gravity corrected Hawking temperature. From this modification, we then derive the local temperature, free... |
gr-qc/0207022 | Oliynyk | Todd A. Oliynyk and H.P. Kunzle | Global behavior of solutions to the static spherically symmetric EYM
equations | 43 pages | Class.Quant.Grav.20:4653-4682,2002 | 10.1088/0264-9381/20/21/007 | null | gr-qc | null | The set of all possible spherically symmetric magnetic static
Einstein-Yang-Mills field equations for an arbitrary compact semi-simple gauge
group $G$ was classified in two previous papers. Local analytic solutions near
the center and a black hole horizon as well as those that are analytic and
bounded near infinity w... | [
{
"created": "Thu, 4 Jul 2002 05:26:36 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Oliynyk",
"Todd A.",
""
],
[
"Kunzle",
"H. P.",
""
]
] | The set of all possible spherically symmetric magnetic static Einstein-Yang-Mills field equations for an arbitrary compact semi-simple gauge group $G$ was classified in two previous papers. Local analytic solutions near the center and a black hole horizon as well as those that are analytic and bounded near infinity wer... |
gr-qc/0208008 | Marcus S. Cohen | Marcus S. Cohen | 8-Spinor Quantum Gravity | 12 pages | null | null | null | gr-qc | null | Quantum gravity has been so elusive because we have tried to approach it by
two paths which can never meet: quantum mechanics and general relativity. These
contradict each other not only in superdense regimes, but also in the vacuum.
We explore a straight road to quantum gravity here--the one mandated by
Clifford-a... | [
{
"created": "Fri, 2 Aug 2002 23:15:52 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cohen",
"Marcus S.",
""
]
] | Quantum gravity has been so elusive because we have tried to approach it by two paths which can never meet: quantum mechanics and general relativity. These contradict each other not only in superdense regimes, but also in the vacuum. We explore a straight road to quantum gravity here--the one mandated by Clifford-algeb... |
2104.08084 | Claus Gerhardt | Claus Gerhardt | The quantization of gravity: Quantization of the Hamilton equations | 33 pages, v2: Typos corrected and two sections added. This is the
published version | Universe 7, no. 4, 91 (2021) | 10.3390/universe7040091 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We quantize the Hamilton equations instead of the Hamilton condition. The
resulting equation has the simple form $-\D u=0$ in a fiber bundle, where the
Laplacian is the Laplacian of the Wheeler-DeWitt metric provided $n\not=4$.
Using then separation of variables the solutions $u$ can be expressed as
products of tempo... | [
{
"created": "Mon, 12 Apr 2021 14:47:12 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Apr 2021 09:22:19 GMT",
"version": "v2"
}
] | 2021-04-20 | [
[
"Gerhardt",
"Claus",
""
]
] | We quantize the Hamilton equations instead of the Hamilton condition. The resulting equation has the simple form $-\D u=0$ in a fiber bundle, where the Laplacian is the Laplacian of the Wheeler-DeWitt metric provided $n\not=4$. Using then separation of variables the solutions $u$ can be expressed as products of tempora... |
gr-qc/0109064 | Hideo Kodama | Hideo Kodama (Kyoto Univ.) | Phase Space of Compact Bianchi Models with Fluid | 58 pages in LaTeX with the PTP style. No figure | Prog.Theor.Phys. 107 (2002) 305-362 | 10.1143/PTP.107.305 | null | gr-qc hep-th | null | The structure of phase space is determined for spatially compact and locally
homogeneous universe models with fluid. Analysis covers models with all
possible space topologies except for those covered by S^3, H^3 or S^2xR which
have no moduli freedom. We show that space topology significantly affects the
number of dyn... | [
{
"created": "Wed, 19 Sep 2001 11:29:35 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Kodama",
"Hideo",
"",
"Kyoto Univ."
]
] | The structure of phase space is determined for spatially compact and locally homogeneous universe models with fluid. Analysis covers models with all possible space topologies except for those covered by S^3, H^3 or S^2xR which have no moduli freedom. We show that space topology significantly affects the number of dynam... |
2111.06111 | Dmitri Gal'tsov | Dmitri Gal'tsov, G\'erard Cl\'ement and Igor Bogush | Einstein-Maxwell-Dilaton-Axion mass formulas for black holes with struts
and strings | 17pages, accepted to Proceedings of 16 Marcel Grossman Meeting (Rome,
July July 5-10, 2021), to be published by World Scientific | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Mass formulas are obtained for stationary axisymmetric solutions of the
Einstein-Maxwell dilaton-axion theory, which have a regular rod structure on
the axis of symmetry. Asymptotic mass, angular momentum and charge are
expressed as the sums of masses, angular momenta and charges of rods dressed
with field contributi... | [
{
"created": "Thu, 11 Nov 2021 09:14:08 GMT",
"version": "v1"
}
] | 2021-11-12 | [
[
"Gal'tsov",
"Dmitri",
""
],
[
"Clément",
"Gérard",
""
],
[
"Bogush",
"Igor",
""
]
] | Mass formulas are obtained for stationary axisymmetric solutions of the Einstein-Maxwell dilaton-axion theory, which have a regular rod structure on the axis of symmetry. Asymptotic mass, angular momentum and charge are expressed as the sums of masses, angular momenta and charges of rods dressed with field contribution... |
1310.7200 | Mandar Patil | Mandar Patil, Pankaj S. Joshi | Particle acceleration by Majumdar-Papapetrou di-hole | 22 pages, Significant changes, Change of title, Accepted for
publication in General Relativity and Gravitation | GenRelativGravit(2014)46:1801 | 10.1007/s10714-014-1801-4 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the multi-black hole spacetimes from the perspective of the
ultra-high energy particle collisions. Such a discussion is limited to the
spacetimes containing a single black hole so far. We deal with the
Majumdar-Papapetrou solution representing a system consisting of two identical
black holes in the equilib... | [
{
"created": "Sun, 27 Oct 2013 14:30:42 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Sep 2014 09:26:12 GMT",
"version": "v2"
}
] | 2014-10-06 | [
[
"Patil",
"Mandar",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | We explore the multi-black hole spacetimes from the perspective of the ultra-high energy particle collisions. Such a discussion is limited to the spacetimes containing a single black hole so far. We deal with the Majumdar-Papapetrou solution representing a system consisting of two identical black holes in the equilibri... |
1903.08284 | Matthew Giesler | Matthew Giesler, Maximiliano Isi, Mark Scheel, and Saul Teukolsky | Black hole ringdown: the importance of overtones | 12 pages, 11 figures; v2 matches published version | Phys. Rev. X 9, 041060 (2019) | 10.1103/PhysRevX.9.041060 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is possible to infer the mass and spin of the remnant black hole from
binary black hole mergers by comparing the ringdown gravitational wave signal
to results from studies of perturbed Kerr spacetimes. Typically these studies
are based on the fundamental quasinormal mode of the dominant $\ell=m=2$
harmonic. By mod... | [
{
"created": "Tue, 19 Mar 2019 23:11:22 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jan 2020 20:47:44 GMT",
"version": "v2"
}
] | 2020-01-13 | [
[
"Giesler",
"Matthew",
""
],
[
"Isi",
"Maximiliano",
""
],
[
"Scheel",
"Mark",
""
],
[
"Teukolsky",
"Saul",
""
]
] | It is possible to infer the mass and spin of the remnant black hole from binary black hole mergers by comparing the ringdown gravitational wave signal to results from studies of perturbed Kerr spacetimes. Typically these studies are based on the fundamental quasinormal mode of the dominant $\ell=m=2$ harmonic. By model... |
gr-qc/0702023 | Giovanni Montani | Giovanni Montani | Evolutionary Reformulation of Quantum Gravity | 5 pages, proceedings of the XI Marcel Grossmann meeting on
Relativistic Astrophysics, July 23-29, 2006, Berlin, minor changes added | null | 10.1142/9789812834300_0478 | null | gr-qc | null | We present a critical analysis of the Canonical approach to quantum gravity,
which relies on the ambiguity of implementing a space-time slicing on the
quantum level. We emphasize that such a splitting procedure is consistent only
if a real matter fluid is involved in the dynamics.
| [
{
"created": "Mon, 5 Feb 2007 15:58:10 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Apr 2007 14:10:09 GMT",
"version": "v2"
}
] | 2016-11-15 | [
[
"Montani",
"Giovanni",
""
]
] | We present a critical analysis of the Canonical approach to quantum gravity, which relies on the ambiguity of implementing a space-time slicing on the quantum level. We emphasize that such a splitting procedure is consistent only if a real matter fluid is involved in the dynamics. |
0905.4643 | Maurice Kleman | Maurice Kleman | Forms of matter and forms of radiation | 30 pages, 4 figures | null | null | IPGP report # 2516 | gr-qc cond-mat.soft | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The theory of defects in ordered and ill-ordered media is a well-advanced
part of condensed matter physics. Concepts developed in this field also occur
in the study of spacetime singularities, namely: i)- the topological theory of
quantized defects (Kibble's cosmic strings) and ii)- the Volterra process for
continuou... | [
{
"created": "Thu, 28 May 2009 13:25:21 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Apr 2011 07:28:55 GMT",
"version": "v2"
}
] | 2011-04-11 | [
[
"Kleman",
"Maurice",
""
]
] | The theory of defects in ordered and ill-ordered media is a well-advanced part of condensed matter physics. Concepts developed in this field also occur in the study of spacetime singularities, namely: i)- the topological theory of quantized defects (Kibble's cosmic strings) and ii)- the Volterra process for continuous ... |
gr-qc/0501101 | Alexander Feinstein | Alberto Diez-Tejedor and Alexander Feinstein | Relativistic hydrodynamics with sources for cosmological K-fluids | 9 pages, no figures. Title changed. Minor corrections. To appear in
Int. Jour. Mod. Phys. D | Int.J.Mod.Phys. D14 (2005) 1561-1576 | 10.1142/S0218271805007152 | null | gr-qc astro-ph hep-ph | null | We consider hydrodynamics with non conserved number of particles and show
that it can be modeled with effective fluid Lagrangians which explicitly depend
on the velocity potentials. For such theories, the {}``shift symetry''
$\phi\to\phi+$const. leading to the conserved number of fluid particles in
conventional hydro... | [
{
"created": "Mon, 31 Jan 2005 11:02:17 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Oct 2005 14:37:58 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Diez-Tejedor",
"Alberto",
""
],
[
"Feinstein",
"Alexander",
""
]
] | We consider hydrodynamics with non conserved number of particles and show that it can be modeled with effective fluid Lagrangians which explicitly depend on the velocity potentials. For such theories, the {}``shift symetry'' $\phi\to\phi+$const. leading to the conserved number of fluid particles in conventional hydrody... |
gr-qc/9408004 | Melnikov Vitaly Nikolaevich | A.A. Kirillov, V.N. Melnikov | Dynamics of inhomogeneities of metric in the vicinity of a singularity
in multidimensional cosmology authors | 9 pages. 1 figure available by request | Phys.Rev.D52:723-729,1995 | 10.1103/PhysRevD.52.723 | RGA-CSVR-012/94 | gr-qc | null | The problem of construction of a general ihomogeneous solution of
$D$-dimensional Einstein equations in the vicinity of a cosmological
singularity is considered. It is shown that near the singularity a local
behavior of metric functions is described by a billiard on a space of a
constant negative curvature. The billi... | [
{
"created": "Mon, 1 Aug 1994 15:17:14 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Kirillov",
"A. A.",
""
],
[
"Melnikov",
"V. N.",
""
]
] | The problem of construction of a general ihomogeneous solution of $D$-dimensional Einstein equations in the vicinity of a cosmological singularity is considered. It is shown that near the singularity a local behavior of metric functions is described by a billiard on a space of a constant negative curvature. The billiar... |
1412.8108 | Sunil Maharaj | Y. Nyonyi, S. D. Maharaj, K. S. Govinder | The Deng algorithm in higher dimensions | 13 pages, Submitted for publication | Advances in Mathematical Physics 2014, 290459 (2014) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend an algorithm of Deng in spherically symmetric spacetimes to higher
dimensions. We show that it is possible to integrate the generalised condition
of pressure isotropy and generate exact solutions to the Einstein field
equations for a shear-free cosmological model with heat flow in higher
dimensions. Three n... | [
{
"created": "Sun, 28 Dec 2014 05:00:12 GMT",
"version": "v1"
}
] | 2014-12-30 | [
[
"Nyonyi",
"Y.",
""
],
[
"Maharaj",
"S. D.",
""
],
[
"Govinder",
"K. S.",
""
]
] | We extend an algorithm of Deng in spherically symmetric spacetimes to higher dimensions. We show that it is possible to integrate the generalised condition of pressure isotropy and generate exact solutions to the Einstein field equations for a shear-free cosmological model with heat flow in higher dimensions. Three new... |
1103.1613 | Emil Mottola | Emil Mottola (Los Alamos National Laboratory and CERN) | Conformal Invariance, Dynamical Dark Energy and the CMB | 8 pages, Latex2e, uses moriond.sty file. Talk given at "2010
Cosmology," March 13-20, 2010, La Thuile, Aosta, Italy | Published in the "Proceedings of the XLVth Rencontres de Moriond,
2010 Cosmology," edited by E. Auge, J. Dumarchez and J. Tran Tranh Van, The
Gioi Publishers, Vietnam (2010) | null | LA-UR-10-04603, CERN-PH-TH 2011-039 | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General Relativity receives quantum corrections relevant at cosmological
distance scales from the conformal scalar degrees of freedom required by the
trace anomaly of the quantum stress tensor in curved space. In the theory
including the trace anomaly terms, the cosmological "constant" becomes
dynamical and hence pot... | [
{
"created": "Tue, 8 Mar 2011 19:48:45 GMT",
"version": "v1"
}
] | 2012-09-25 | [
[
"Mottola",
"Emil",
"",
"Los Alamos National Laboratory and CERN"
]
] | General Relativity receives quantum corrections relevant at cosmological distance scales from the conformal scalar degrees of freedom required by the trace anomaly of the quantum stress tensor in curved space. In the theory including the trace anomaly terms, the cosmological "constant" becomes dynamical and hence poten... |
gr-qc/0603001 | Anzhong Wang | G.A. Benesh and Anzhong Wang | Homothetic Self-Similar Solutions of the Three-Dimensional Brans-Dicke
Gravity | latex, five pages, without figure | Gen.Rel.Grav.39:277-289,2007 | 10.1007/s10714-006-0382-2 | null | gr-qc astro-ph hep-ph hep-th math-ph math.MP | null | All homothetic self-similar solutions of the Brans-Dicke scalar field in
three-dimensional spacetime with circular symmetry are found in closed form.
| [
{
"created": "Tue, 28 Feb 2006 21:03:50 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Benesh",
"G. A.",
""
],
[
"Wang",
"Anzhong",
""
]
] | All homothetic self-similar solutions of the Brans-Dicke scalar field in three-dimensional spacetime with circular symmetry are found in closed form. |
0910.2333 | Dana Levanony | Dana Levanony and Amos Ori | Interior design of a two-dimensional semiclassic black hole | Typos corrected | Phys. Rev. D 80, 084008 (2009) | 10.1103/PhysRevD.80.084008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We look into the inner structure of a two-dimensional dilatonic evaporating
black hole. We establish and employ the homogenous approximation for the
black-hole interior. The field equations admit two types of singularities, and
their local asymptotic structure is investigated. One of these singularities is
found to d... | [
{
"created": "Tue, 13 Oct 2009 08:37:28 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Dec 2009 11:56:22 GMT",
"version": "v2"
}
] | 2009-12-28 | [
[
"Levanony",
"Dana",
""
],
[
"Ori",
"Amos",
""
]
] | We look into the inner structure of a two-dimensional dilatonic evaporating black hole. We establish and employ the homogenous approximation for the black-hole interior. The field equations admit two types of singularities, and their local asymptotic structure is investigated. One of these singularities is found to dev... |
1309.5157 | Carla Cederbaum | Carla Cederbaum | Level sets of the lapse function in static GR | updated to published version. in D. Puetzfeld et al. (eds.),
Equations of Motion in Relativistic Gravity, Fundamental Theories of Physics
179, Springer, 2015 | null | 10.1007/978-3-319-18335-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a novel physical interpretation of the level sets of the
(canonical) lapse function in static isolated general relativistic space-times.
Our interpretation uses a notion of 'constrained test particles'. It leads to a
definition of gravitational force on test particles and to a previously unknown
uniqueness... | [
{
"created": "Fri, 20 Sep 2013 02:25:21 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Sep 2014 06:34:17 GMT",
"version": "v2"
},
{
"created": "Wed, 24 Jun 2015 07:25:16 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Cederbaum",
"Carla",
""
]
] | We present a novel physical interpretation of the level sets of the (canonical) lapse function in static isolated general relativistic space-times. Our interpretation uses a notion of 'constrained test particles'. It leads to a definition of gravitational force on test particles and to a previously unknown uniqueness r... |
gr-qc/0301075 | Farhad Darabi | F. Darabi | Accelerating Universe and Dynamical Compactification of Extra Dimensions | 16 pages, 18 figures, minor adjustments, further remarks, references
added | Class.Quant.Grav. 20 (2003) 3385-3402 | 10.1088/0264-9381/20/15/308 | null | gr-qc hep-th | null | We study a $(4+D)$-dimensional Kaluza-Klein cosmology with a Robertson-Walker
type metric having two scale factors $a$ and $R$, corresponding to
$D$-dimensional internal space and 4-dimensional universe, respectively. By
introducing an exotic matter as the space-time part of the higher dimensional
energy-momentum ten... | [
{
"created": "Tue, 21 Jan 2003 09:46:56 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Aug 2003 13:51:15 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Darabi",
"F.",
""
]
] | We study a $(4+D)$-dimensional Kaluza-Klein cosmology with a Robertson-Walker type metric having two scale factors $a$ and $R$, corresponding to $D$-dimensional internal space and 4-dimensional universe, respectively. By introducing an exotic matter as the space-time part of the higher dimensional energy-momentum tenso... |
1106.1534 | Tiago Charters | T. Charters | On a proof of the collapse conjecture for a diagonal Bianchi type-IX
vacuum space-time | null | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is given a simple proof of the collapse conjecture for a diagonal Bianchi
type-IX vacuum space-time. It is shown that the codimension of the infinity
stable attractor, restricted to the anisotropy plane, is not zero, thus proving
that "escape along a channel" is impossible.
| [
{
"created": "Wed, 8 Jun 2011 10:45:29 GMT",
"version": "v1"
}
] | 2011-06-09 | [
[
"Charters",
"T.",
""
]
] | It is given a simple proof of the collapse conjecture for a diagonal Bianchi type-IX vacuum space-time. It is shown that the codimension of the infinity stable attractor, restricted to the anisotropy plane, is not zero, thus proving that "escape along a channel" is impossible. |
gr-qc/9405068 | Cm41 | Charles W. Misner | The Mixmaster cosmological metrics | 13pp., LaTeX, 1 uuencoded figure, UMCP PP94-162 | null | null | null | gr-qc | null | This paper begins with a short presentation of the Bianchi IX or
``Mixmaster'' cosmological model, and some ways of writing the Einstein
equations for it. There is then an interlude describing how I came to a study
of this model, and then a report of some mostly unpublished work from a Ph.\ D.
thesis of D. M. (Prakas... | [
{
"created": "Fri, 27 May 1994 19:42:00 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Misner",
"Charles W.",
""
]
] | This paper begins with a short presentation of the Bianchi IX or ``Mixmaster'' cosmological model, and some ways of writing the Einstein equations for it. There is then an interlude describing how I came to a study of this model, and then a report of some mostly unpublished work from a Ph.\ D. thesis of D. M. (Prakash)... |
1906.08161 | Mohammed Khalil | Mohammed Khalil, Noah Sennett, Jan Steinhoff, Alessandra Buonanno | Theory-agnostic framework for dynamical scalarization of compact
binaries | 15 pages, 5 figures. v3: added a figure, supplementary material,
clarifications, and fixed typos. published | Phys. Rev. D 100, 124013 (2019) | 10.1103/PhysRevD.100.124013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave observations can provide unprecedented insight into the
fundamental nature of gravity and allow for novel tests of modifications to
General Relativity. One proposed modification suggests that gravity may undergo
a phase transition in the strong-field regime; the detection of such a new
phase would ... | [
{
"created": "Wed, 19 Jun 2019 15:36:55 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jun 2019 14:46:05 GMT",
"version": "v2"
},
{
"created": "Wed, 4 Dec 2019 18:11:20 GMT",
"version": "v3"
}
] | 2019-12-05 | [
[
"Khalil",
"Mohammed",
""
],
[
"Sennett",
"Noah",
""
],
[
"Steinhoff",
"Jan",
""
],
[
"Buonanno",
"Alessandra",
""
]
] | Gravitational wave observations can provide unprecedented insight into the fundamental nature of gravity and allow for novel tests of modifications to General Relativity. One proposed modification suggests that gravity may undergo a phase transition in the strong-field regime; the detection of such a new phase would co... |
2312.04929 | Mykola Stetsko | M. Cvetic, M. A. Liao, M. M. Stetsko | Higher Spin Mode Stability for STU Black Hole Backgrounds | 11 pages + references | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work studies mode stability of an STU black hole with four pairwise
equal $\rm{U(1)}$ charges in four spacetime dimensions. We investigate bosonic
perturbations for probe fields of different spins through the transformation
technique devised by Whiting in 1989. Finally, we introduce connection
relations inspired... | [
{
"created": "Fri, 8 Dec 2023 09:45:01 GMT",
"version": "v1"
}
] | 2023-12-11 | [
[
"Cvetic",
"M.",
""
],
[
"Liao",
"M. A.",
""
],
[
"Stetsko",
"M. M.",
""
]
] | This work studies mode stability of an STU black hole with four pairwise equal $\rm{U(1)}$ charges in four spacetime dimensions. We investigate bosonic perturbations for probe fields of different spins through the transformation technique devised by Whiting in 1989. Finally, we introduce connection relations inspired b... |
1701.00231 | Sante Carloni Dr | Sante Carloni, Jos\'e P. Mimoso | Phase space of modified Gauss-Bonnet gravity | 13 pages, 5 figures, 1 table | null | 10.1140/epjc/s10052-017-5110-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the evolution of non vacuum
Friedmann-Lema\^itre-Robertson-Walker (FLRW) with any spatial curvature in the
context of Gauss-Bonnet gravity. The analysis employs a new method which
enables us to explore the phase space of any specific theory of this class. We
consider several examples, discussing the tr... | [
{
"created": "Sun, 1 Jan 2017 11:53:56 GMT",
"version": "v1"
}
] | 2017-09-13 | [
[
"Carloni",
"Sante",
""
],
[
"Mimoso",
"José P.",
""
]
] | We investigate the evolution of non vacuum Friedmann-Lema\^itre-Robertson-Walker (FLRW) with any spatial curvature in the context of Gauss-Bonnet gravity. The analysis employs a new method which enables us to explore the phase space of any specific theory of this class. We consider several examples, discussing the tran... |
1609.03599 | Noemi Frusciante | Antonio De Felice, Noemi Frusciante, Georgios Papadomanolakis | On the stability conditions for theories of modified gravity in presence
of matter fields | 21 pages, 1 figure; appendix B added, comments added in Secs IV A and
B; Matches published version | JCAP03(2017)027 | 10.1088/1475-7516/2017/03/027 | YITP-16-102 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a thorough stability analysis of modified gravity theories in the
presence of matter fields. We use the Effective Field Theory framework for Dark
Energy and Modified Gravity to retain a general approach for the gravity sector
and a Sorkin-Schutz action for the matter one. Then, we work out the proper
viabi... | [
{
"created": "Mon, 12 Sep 2016 20:44:51 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Mar 2017 17:48:14 GMT",
"version": "v2"
}
] | 2017-03-14 | [
[
"De Felice",
"Antonio",
""
],
[
"Frusciante",
"Noemi",
""
],
[
"Papadomanolakis",
"Georgios",
""
]
] | We present a thorough stability analysis of modified gravity theories in the presence of matter fields. We use the Effective Field Theory framework for Dark Energy and Modified Gravity to retain a general approach for the gravity sector and a Sorkin-Schutz action for the matter one. Then, we work out the proper viabili... |
1411.4267 | Zacharias Roupas | Zacharias Roupas | Relativistic Gravothermal Instabilities | 30 pages, 21 figures; references added; minor changes to match
published version | Class. Quantum Grav. 32 135023 (2015) | 10.1088/0264-9381/32/13/135023 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The thermodynamic instabilities of the self-gravitating, classical ideal gas
are studied in the case of static, spherically symmetric configurations in
General Relativity taking into account the Tolman-Ehrenfest effect. One type of
instabilities is found at low energies, where thermal energy becomes too weak
to halt ... | [
{
"created": "Sun, 16 Nov 2014 15:07:59 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Jun 2015 16:28:41 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Roupas",
"Zacharias",
""
]
] | The thermodynamic instabilities of the self-gravitating, classical ideal gas are studied in the case of static, spherically symmetric configurations in General Relativity taking into account the Tolman-Ehrenfest effect. One type of instabilities is found at low energies, where thermal energy becomes too weak to halt gr... |
1208.0260 | Foek Hioe | F.T. Hioe and David Kuebel | Elliptic orbits with a non-Newtonian eccentricity | 8 pages, 0 figures. arXiv admin note: text overlap with
arXiv:1207.7041 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the lowest order general relativistic correction produces
elliptic orbits with a non-Newtonian eccentricity.
| [
{
"created": "Wed, 1 Aug 2012 16:07:39 GMT",
"version": "v1"
}
] | 2012-08-02 | [
[
"Hioe",
"F. T.",
""
],
[
"Kuebel",
"David",
""
]
] | It is shown that the lowest order general relativistic correction produces elliptic orbits with a non-Newtonian eccentricity. |
gr-qc/0102007 | David Langlois | David Langlois (IAP, Paris) | Cosmological evolution in a brane-universe | 2 pages, "mprocl.sty" with LaTeX 2.09; contribution to the 9th Marcel
Grossmann Meeting (MG9), Rome, July 2000 | null | 10.1142/9789812777386_0478 | null | gr-qc | null | The idea of extra-dimensions has recently gone through a renewal with the
hypothesis, suggested by recent developments in string theory, that ordinary
matter is confined to a sub-space, called brane, embedded in a higher
dimensional spacetime. I summarize here some consequences in cosmology of this
type of models. Th... | [
{
"created": "Fri, 2 Feb 2001 13:22:06 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Langlois",
"David",
"",
"IAP, Paris"
]
] | The idea of extra-dimensions has recently gone through a renewal with the hypothesis, suggested by recent developments in string theory, that ordinary matter is confined to a sub-space, called brane, embedded in a higher dimensional spacetime. I summarize here some consequences in cosmology of this type of models. The ... |
2202.01701 | Jose Beltran Jimenez | Jose Beltr\'an Jim\'enez and Tomi S. Koivisto | Lost in translation: the Abelian affine connection (in the coincident
gauge) | 11 pages, no figues; Contribution to the Special Issue of the
International Journal of Geometric Methods in Modern Physics dedicated to the
conference Geometric Foundations of Gravity 2021 | null | 10.1142/S0219887822501080 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | The simplest i.e. the Abelian i.e. the commutative i.e. the integrable i.e.
the flat and torsion-free i.e. the symmetric teleparallel affine connection has
been considered in many recent works in the literature. Such an affine
connection is characterised by the property that it can be vanished by a
general coordinate... | [
{
"created": "Thu, 3 Feb 2022 17:11:05 GMT",
"version": "v1"
}
] | 2022-06-01 | [
[
"Jiménez",
"Jose Beltrán",
""
],
[
"Koivisto",
"Tomi S.",
""
]
] | The simplest i.e. the Abelian i.e. the commutative i.e. the integrable i.e. the flat and torsion-free i.e. the symmetric teleparallel affine connection has been considered in many recent works in the literature. Such an affine connection is characterised by the property that it can be vanished by a general coordinate t... |
gr-qc/9705064 | Alberto Vecchio | David Nicholson and Alberto Vecchio | Bayesian Bounds on Parameter Estimation Accuracy for Compact Coalescing
Binary Gravitational Wave Signals | 17 pages (LaTeX), 4 figures. Submitted to Physical Review D | Phys.Rev. D57 (1998) 4588-4599 | 10.1103/PhysRevD.57.4588 | null | gr-qc | null | A global network of laser interferometric gravitational wave detectors is
projected to be in operation by around the turn of the century. Here, the noisy
output of a single instrument is examined. A gravitational wave is assumed to
have been detected in the data and we deal with the subsequent problem of
parameter es... | [
{
"created": "Fri, 23 May 1997 10:25:55 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Nicholson",
"David",
""
],
[
"Vecchio",
"Alberto",
""
]
] | A global network of laser interferometric gravitational wave detectors is projected to be in operation by around the turn of the century. Here, the noisy output of a single instrument is examined. A gravitational wave is assumed to have been detected in the data and we deal with the subsequent problem of parameter esti... |
0802.4257 | Jerzy Matyjasek | Jerzy Matyjasek | Some remarks on the Einstein and M{\o}ller pseudotensors for static and
spherically-symmetric configurations | null | Mod.Phys.Lett.A23:591-601,2008 | 10.1142/S0217732308026558 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that for the spherically-symmetric and static systems the
hypotheses posed by Yang and Radinschi and by Vagenas can be related to the
particular distribution of the source. Simple proofs are given and a number of
examples are discussed with the special emphasis put on the quantum corrected
Schwarzschild b... | [
{
"created": "Thu, 28 Feb 2008 18:24:43 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Matyjasek",
"Jerzy",
""
]
] | It is shown that for the spherically-symmetric and static systems the hypotheses posed by Yang and Radinschi and by Vagenas can be related to the particular distribution of the source. Simple proofs are given and a number of examples are discussed with the special emphasis put on the quantum corrected Schwarzschild bla... |
gr-qc/0010043 | Nese Ozdemir | N. Ozdemir | Exact metric around a wiggly cosmic string | 5 pages | Gen.Rel.Grav. 33 (2001) 603-606 | 10.1023/A:1010213301350 | null | gr-qc | null | The exact metric around a wiggly cosmic string is found by modifying the
energy momentum-tensor of a straight infinitely thin cosmic string to include
an electric current along the symmetry axis.
| [
{
"created": "Wed, 11 Oct 2000 09:33:35 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Ozdemir",
"N.",
""
]
] | The exact metric around a wiggly cosmic string is found by modifying the energy momentum-tensor of a straight infinitely thin cosmic string to include an electric current along the symmetry axis. |
2111.04934 | Baomin Gu | Dong-Yu Li, Zhao-Xiang Wu, Hao Hu, and Bao-Min Gu | De Sitter braneworld and gravitational waves | 8 pages, 4 figures, accepted by Canadian Journal of Physics | null | 10.1139/cjp-2021-0266 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the braneworld theory constructed by multi scalar fields. The model
contains a smooth and infinitely large extra dimension, allowing the background
fields propagating in it. We give a de Sitter solution for the four-dimensional
cosmology as a good approximation to the early universe inflation. We show that
t... | [
{
"created": "Tue, 9 Nov 2021 03:33:21 GMT",
"version": "v1"
}
] | 2022-02-16 | [
[
"Li",
"Dong-Yu",
""
],
[
"Wu",
"Zhao-Xiang",
""
],
[
"Hu",
"Hao",
""
],
[
"Gu",
"Bao-Min",
""
]
] | We study the braneworld theory constructed by multi scalar fields. The model contains a smooth and infinitely large extra dimension, allowing the background fields propagating in it. We give a de Sitter solution for the four-dimensional cosmology as a good approximation to the early universe inflation. We show that the... |
1410.1849 | Olga Babourova Valer'evna | O.V. Babourova, B.N. Frolov | Dark energy as a cosmological consequence of existence of the Dirac
scalar field | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The solution of the field equations of the conformal theory of gravitation
with Dirac scalar field in Cartan-Weyl spacetime at the very early Universe is
obtained. In this theory dark energy (describing by an effective cosmological
constant) is a function of the Dirac scalar field $\beta$. This solution
describes the... | [
{
"created": "Tue, 7 Oct 2014 18:58:46 GMT",
"version": "v1"
}
] | 2014-10-08 | [
[
"Babourova",
"O. V.",
""
],
[
"Frolov",
"B. N.",
""
]
] | The solution of the field equations of the conformal theory of gravitation with Dirac scalar field in Cartan-Weyl spacetime at the very early Universe is obtained. In this theory dark energy (describing by an effective cosmological constant) is a function of the Dirac scalar field $\beta$. This solution describes the e... |
1811.11499 | Emilio Elizalde | Emilio Elizalde and Martiros Khurshudyan | On wormhole formation in $f(\textit{R}, \textit{T})$ gravity: varying
Chaplygin gas and barotropic fluid | 14 pages, 7 figures, to appear in PRD | null | 10.1103/PhysRevD.98.123525 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Formation of specific static wormhole models is discussed, by assuming an
$f(\textit{R}, \textit{T}) = R + 2 \lambda T$ extended theory of gravity, $T =-
\rho + P_{r} + 2P_{l}$ being the trace of the energy momentum tensor. In the
first part, wormhole solutions are constructed imposing that the radial
pressure admits... | [
{
"created": "Wed, 28 Nov 2018 11:18:31 GMT",
"version": "v1"
}
] | 2019-01-09 | [
[
"Elizalde",
"Emilio",
""
],
[
"Khurshudyan",
"Martiros",
""
]
] | Formation of specific static wormhole models is discussed, by assuming an $f(\textit{R}, \textit{T}) = R + 2 \lambda T$ extended theory of gravity, $T =- \rho + P_{r} + 2P_{l}$ being the trace of the energy momentum tensor. In the first part, wormhole solutions are constructed imposing that the radial pressure admits a... |
gr-qc/0312108 | Leonard Parker | Leonard Parker and Daniel A. T. Vanzella | Acceleration of the universe, vacuum metamorphosis, and the large-time
asymptotic form of the heat kernel | 33 pages, 3 figures. Submitted to Physical Review D15 (Dec 23, 2003).
v2: 1 reference added. No other changes | Phys.Rev. D69 (2004) 104009 | 10.1103/PhysRevD.69.104009 | null | gr-qc | null | We investigate the possibility that the late acceleration observed in the
rate of expansion of the universe is due to vacuum quantum effects arising in
curved spacetime. The theoretical basis of the vacuum cold dark matter (VCDM),
or vacuum metamorphosis, cosmological model of Parker and Raval is revisited
and improv... | [
{
"created": "Wed, 24 Dec 2003 23:27:27 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Jan 2004 23:13:29 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Parker",
"Leonard",
""
],
[
"Vanzella",
"Daniel A. T.",
""
]
] | We investigate the possibility that the late acceleration observed in the rate of expansion of the universe is due to vacuum quantum effects arising in curved spacetime. The theoretical basis of the vacuum cold dark matter (VCDM), or vacuum metamorphosis, cosmological model of Parker and Raval is revisited and improved... |
gr-qc/9907106 | Voja Radovanovic | Maja Buric, Voja Radovanovic | ADM mass of the quantum-corrected Schwarzchild black hole | 15 pages, Latex, nofigures | Class.Quant.Grav.17:33-42,2000 | 10.1088/0264-9381/17/1/304 | null | gr-qc hep-th | null | We study the hamiltonian and constraints of spherically symmetric dilaton
gravity model. We find the ADM mass of the solution representing the
Schwarzchild black hole in thermal equilibrium with the Hawking radiation.
| [
{
"created": "Fri, 30 Jul 1999 15:41:58 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Buric",
"Maja",
""
],
[
"Radovanovic",
"Voja",
""
]
] | We study the hamiltonian and constraints of spherically symmetric dilaton gravity model. We find the ADM mass of the solution representing the Schwarzchild black hole in thermal equilibrium with the Hawking radiation. |
gr-qc/0511050 | Jay Yablon | Jay R. Yablon | General Relativity, Maxwell's Electrodynamics, and the Foundations of
the Quantum Theory of Gravitation and Matter | 32 pages, no figures | null | null | null | gr-qc | null | The formalism of electric - magnetic duality, first pioneered by Reinich and
Wheeler, extends General Relativity to encompass non-Abelian fields. Several
energy Tensors T^uv with non-vanishing trace matter are developed solely as a
function of the field strength tensor F^uv, including the Euler tensor, and
tensors fo... | [
{
"created": "Thu, 10 Nov 2005 19:04:07 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Yablon",
"Jay R.",
""
]
] | The formalism of electric - magnetic duality, first pioneered by Reinich and Wheeler, extends General Relativity to encompass non-Abelian fields. Several energy Tensors T^uv with non-vanishing trace matter are developed solely as a function of the field strength tensor F^uv, including the Euler tensor, and tensors for ... |
2202.00594 | Lee Smolin | Lee Smolin | Views, variety and celestial spheres | 27 pages, no figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This paper describes a continuation of the program of causal views, in which
the world consists of nothing but a vast number of partial views of its past.
Each view is associated to an event, and is a representation of the immediate
causal past of that event. These consists mainly of processes that transfer
energy, m... | [
{
"created": "Tue, 1 Feb 2022 17:36:24 GMT",
"version": "v1"
}
] | 2022-02-02 | [
[
"Smolin",
"Lee",
""
]
] | This paper describes a continuation of the program of causal views, in which the world consists of nothing but a vast number of partial views of its past. Each view is associated to an event, and is a representation of the immediate causal past of that event. These consists mainly of processes that transfer energy, mom... |
1001.2667 | Xin Li | Xin Li, Zhe Chang and Xiaohuan Mo | Isometric group of $(\alpha,\beta)$-type Finsler space and the symmetry
of Very Special Relativity | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/3.0/ | The Killing equation for a general Finsler space is set up. It is showed that
the Killing equation of $(\alpha,\beta)$ space can be divided into two parts.
One is the same with Killing equation of a Riemannian metric, another equation
can be regarded as a constraint. The solutions of Killing equations present
explici... | [
{
"created": "Fri, 15 Jan 2010 11:42:57 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Apr 2010 08:08:30 GMT",
"version": "v2"
}
] | 2010-04-08 | [
[
"Li",
"Xin",
""
],
[
"Chang",
"Zhe",
""
],
[
"Mo",
"Xiaohuan",
""
]
] | The Killing equation for a general Finsler space is set up. It is showed that the Killing equation of $(\alpha,\beta)$ space can be divided into two parts. One is the same with Killing equation of a Riemannian metric, another equation can be regarded as a constraint. The solutions of Killing equations present explicitl... |
1907.02072 | James Edholm | Masato Minamitsuji and James Edholm | Black hole solutions in shift-symmetric degenerate higher-order
scalar-tensor theories | 16 pages | Phys. Rev. D 100, 044053 (2019) | 10.1103/PhysRevD.100.044053 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that most classes of shift-symmetric degenerate higher-order
scalar-tensor (DHOST) theories which satisfy certain degeneracy conditions are
not compatible with the conditions for the existence of exact black hole
solutions with a linearly time-dependent scalar field whose canonical kinetic
term takes a consta... | [
{
"created": "Wed, 3 Jul 2019 18:00:01 GMT",
"version": "v1"
}
] | 2019-09-04 | [
[
"Minamitsuji",
"Masato",
""
],
[
"Edholm",
"James",
""
]
] | We show that most classes of shift-symmetric degenerate higher-order scalar-tensor (DHOST) theories which satisfy certain degeneracy conditions are not compatible with the conditions for the existence of exact black hole solutions with a linearly time-dependent scalar field whose canonical kinetic term takes a constant... |
1712.07478 | Zhu Yi | Zhu Yi and Yungui Gong | On the constant-roll inflation | 17 pages, 6 figures, some references added, jcap in press | JCAP1803(2018)052 | 10.1088/1475-7516/2018/03/052 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The primordial power spectra of scalar and tensor perturbations during
slow-roll inflation are usually calculated with the method of Bessel function
approximation. For constant-roll or ultra slow-roll inflation, the method of
Bessel function approximation may be invalid. We compare the numerical results
with the anal... | [
{
"created": "Wed, 20 Dec 2017 13:40:41 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Mar 2018 10:49:12 GMT",
"version": "v2"
}
] | 2018-04-09 | [
[
"Yi",
"Zhu",
""
],
[
"Gong",
"Yungui",
""
]
] | The primordial power spectra of scalar and tensor perturbations during slow-roll inflation are usually calculated with the method of Bessel function approximation. For constant-roll or ultra slow-roll inflation, the method of Bessel function approximation may be invalid. We compare the numerical results with the analyt... |
1103.5993 | Steven Carlip | S. Carlip, R. A. Mosna, J. P. M. Pitelli | Vacuum Fluctuations and the Small Scale Structure of Spacetime | 4 pages, revtex | Phys.Rev.Lett.107:021303,2011 | 10.1103/PhysRevLett.107.021303 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that vacuum fluctuations of the stress-energy tensor in
two-dimensional dilaton gravity lead to a sharp focusing of light cones near
the Planck scale, effectively breaking space up into a large number of causally
disconnected regions. This phenomenon, called "asymptotic silence" when it
occurs in cosmology, m... | [
{
"created": "Wed, 30 Mar 2011 17:10:42 GMT",
"version": "v1"
}
] | 2011-08-01 | [
[
"Carlip",
"S.",
""
],
[
"Mosna",
"R. A.",
""
],
[
"Pitelli",
"J. P. M.",
""
]
] | We show that vacuum fluctuations of the stress-energy tensor in two-dimensional dilaton gravity lead to a sharp focusing of light cones near the Planck scale, effectively breaking space up into a large number of causally disconnected regions. This phenomenon, called "asymptotic silence" when it occurs in cosmology, mig... |
gr-qc/0006089 | Kudoh Hideaki | H. Kudoh (YITP, Kyoto U.), T. Harada (Waseda U.) and H. Iguchi (Osaka
U.) | Birth of timelike naked singularity | 14 pages, 2 figures | Phys.Rev. D62 (2000) 104016 | 10.1103/PhysRevD.62.104016 | YITP-00-33, WU-AP/106/00, OU-TAP 140 | gr-qc | null | We investigate the causal structure of the Harada-Iguchi-Nakao (HIN)'s exact
solution in detail, which describes the dynamical formation of naked
singularity in the collapse of a regular spherical cluster of counterrotating
particles. There are three kinds of radial null geodesics in the HIN spacetime.
One is the reg... | [
{
"created": "Sun, 25 Jun 2000 05:51:30 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Kudoh",
"H.",
"",
"YITP, Kyoto U."
],
[
"Harada",
"T.",
"",
"Waseda U."
],
[
"Iguchi",
"H.",
"",
"Osaka\n U."
]
] | We investigate the causal structure of the Harada-Iguchi-Nakao (HIN)'s exact solution in detail, which describes the dynamical formation of naked singularity in the collapse of a regular spherical cluster of counterrotating particles. There are three kinds of radial null geodesics in the HIN spacetime. One is the regul... |
1711.05707 | Mauricio Bellini | Marcos R. A. Arcod\'ia, Luis Santiago Ridao, Mauricio Bellini | Emission of primordial bosonic radiation during inflation | Version accepted in Can. J. Phys. arXiv admin note: text overlap with
arXiv:1709.01162 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the emission of neutral massless $(1, 2)\hbar$-spin bosons during
power-law inflation using unified spinor field theory. We shows that during
inflation gravitons and photons were emitted with wavelengths (on physical
coordinates) that increase as the Hubble radius: $\lambda_{Ph} \sim a/H$. The
quantised acti... | [
{
"created": "Wed, 15 Nov 2017 18:06:57 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Feb 2018 20:39:12 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Jun 2018 15:51:12 GMT",
"version": "v3"
}
] | 2019-03-20 | [
[
"Arcodía",
"Marcos R. A.",
""
],
[
"Ridao",
"Luis Santiago",
""
],
[
"Bellini",
"Mauricio",
""
]
] | We study the emission of neutral massless $(1, 2)\hbar$-spin bosons during power-law inflation using unified spinor field theory. We shows that during inflation gravitons and photons were emitted with wavelengths (on physical coordinates) that increase as the Hubble radius: $\lambda_{Ph} \sim a/H$. The quantised action... |
gr-qc/0408040 | Marco Bruni | Christian Cherubini, Donato Bini, Marco Bruni, Zoltan Perjes | The Speciality Index as invariant indicator in the BKL Mixmaster
Dynamics | null | Class.Quant.Grav. 22 (2005) 1763-1768 | 10.1088/0264-9381/22/9/018 | null | gr-qc | null | The speciality index, which has been mainly used in Numerical Relativity for
studying gravitational waves phenomena as an indicator of the special or
non-special Petrov type character of a spacetime, is applied here in the
context of Mixmaster cosmology, using the Belinski-Khalatnikov-Lifshitz map.
Possible applicati... | [
{
"created": "Fri, 13 Aug 2004 09:42:18 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Cherubini",
"Christian",
""
],
[
"Bini",
"Donato",
""
],
[
"Bruni",
"Marco",
""
],
[
"Perjes",
"Zoltan",
""
]
] | The speciality index, which has been mainly used in Numerical Relativity for studying gravitational waves phenomena as an indicator of the special or non-special Petrov type character of a spacetime, is applied here in the context of Mixmaster cosmology, using the Belinski-Khalatnikov-Lifshitz map. Possible application... |
1907.12565 | Carlos A. R. Herdeiro | N. Sanchis-Gual, F. Di Giovanni, M. Zilh\~ao, C. Herdeiro, P.
Cerd\'a-Dur\'an, J. A. Font, E. Radu | Non-linear dynamics of spinning bosonic stars: formation and stability | 5+3 pages, 4+1 figures; movies of the numerical simulations reported
can be found in http://gravitation.web.ua.pt/node/1740 | Phys. Rev. Lett. 123, 221101 (2019) | 10.1103/PhysRevLett.123.221101 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform numerical evolutions of the fully non-linear Einstein-(complex,
massive)Klein-Gordon and Einstein-(complex)Proca systems, to assess the
formation and stability of spinning bosonic stars. In the scalar/vector case
these are known as boson/Proca stars. Firstly, we consider the formation
scenario. Starting wi... | [
{
"created": "Mon, 29 Jul 2019 18:00:01 GMT",
"version": "v1"
}
] | 2019-12-04 | [
[
"Sanchis-Gual",
"N.",
""
],
[
"Di Giovanni",
"F.",
""
],
[
"Zilhão",
"M.",
""
],
[
"Herdeiro",
"C.",
""
],
[
"Cerdá-Durán",
"P.",
""
],
[
"Font",
"J. A.",
""
],
[
"Radu",
"E.",
""
]
] | We perform numerical evolutions of the fully non-linear Einstein-(complex, massive)Klein-Gordon and Einstein-(complex)Proca systems, to assess the formation and stability of spinning bosonic stars. In the scalar/vector case these are known as boson/Proca stars. Firstly, we consider the formation scenario. Starting with... |
1609.03942 | Philipp Roser | Philipp Roser | Gravitation and cosmology with York time | PhD thesis, 195 pages, 6 figures, 1 table; heavily draws on text
overlap with: arXiv:1406.2036, arXiv:1407.4005, arXiv:1507.01556,
arXiv:1507.08975, arXiv:1511.03320, arXiv:1606.01801 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | [Shortened abstract:] In this thesis we investigate a solution to the
`problem of time' in canonical quantum gravity by splitting spacetime into
surfaces of constant mean curvature parameterised by York time. We argue that
there are reasons to consider York time a viable candidate for a physically
meaningful notion o... | [
{
"created": "Tue, 13 Sep 2016 17:30:17 GMT",
"version": "v1"
}
] | 2016-09-14 | [
[
"Roser",
"Philipp",
""
]
] | [Shortened abstract:] In this thesis we investigate a solution to the `problem of time' in canonical quantum gravity by splitting spacetime into surfaces of constant mean curvature parameterised by York time. We argue that there are reasons to consider York time a viable candidate for a physically meaningful notion of ... |
gr-qc/0112079 | Ramin G. Daghigh | Y. Hosotani and T. Nakajima (Osaka University), R. G. Daghigh and J.
I. Kapusta (University of Minnesota) | Cosmic Shells | 24 pages, 12 figures | Phys.Rev. D66 (2002) 104020 | 10.1103/PhysRevD.66.104020 | null | gr-qc | null | When a potential for a scalar field has two local minima there arise
spherical shell-type solutions of the classical field equations due to
gravitational attraction. We establish such solutions numerically in a space
which is asymptotically de Sitter. It generically arises when the energy scale
characterizing the sca... | [
{
"created": "Sat, 29 Dec 2001 23:27:57 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Hosotani",
"Y.",
"",
"Osaka University"
],
[
"Nakajima",
"T.",
"",
"Osaka University"
],
[
"Daghigh",
"R. G.",
"",
"University of Minnesota"
],
[
"Kapusta",
"J. I.",
"",
"University of Minnesota"
]
] | When a potential for a scalar field has two local minima there arise spherical shell-type solutions of the classical field equations due to gravitational attraction. We establish such solutions numerically in a space which is asymptotically de Sitter. It generically arises when the energy scale characterizing the scala... |
1604.05297 | Surajit Chattopadhyay | Surajit Chattopadhyay | Israel-Stewart approach to viscous dissipative extended holographic
Ricci dark energy dominated universe | 23 pages, 11 figures. arXiv admin note: text overlap with
arXiv:0801.2008 by other authors | Advances in High Energy Physics, vol. 2016, Article ID 8515967
(2016) | 10.1155/2016/8515967 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper reports a study on the truncated Israel-Stewart formalism for bulk
viscosity using the extended holographic Ricci dark energy (EHRDE), where the
density of dark energy is given as a combination of the Hubble parameter and
its derivative. The equations of motion are integrated and the resulting model
is ana... | [
{
"created": "Sat, 16 Apr 2016 04:05:33 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Apr 2016 14:51:13 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Apr 2016 04:25:31 GMT",
"version": "v3"
},
{
"created": "Mon, 23 May 2016 18:40:41 GMT",
"version": "v4"
},
{
"c... | 2016-09-09 | [
[
"Chattopadhyay",
"Surajit",
""
]
] | This paper reports a study on the truncated Israel-Stewart formalism for bulk viscosity using the extended holographic Ricci dark energy (EHRDE), where the density of dark energy is given as a combination of the Hubble parameter and its derivative. The equations of motion are integrated and the resulting model is analy... |
gr-qc/9909066 | N. K. Dadhich | Naresh Dadhich and L.K. Patel | Gravoelectric-dual of the Kerr solution | 14 pages, LaTEX version | J.Math.Phys. 41 (2000) 882-890 | 10.1063/1.533177 | IUCAA-35/99 | gr-qc | null | By decomposing the Riemann curvature into electric and magnetic parts, we
define the gravoelectric duality transformation by interchange of active and
passive electric parts which amounts to interchange of the Ricci and Einstein
tensors. It turns out that the vacuum equation is duality-invariant. We obtain
solutions ... | [
{
"created": "Tue, 21 Sep 1999 12:11:30 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Dadhich",
"Naresh",
""
],
[
"Patel",
"L. K.",
""
]
] | By decomposing the Riemann curvature into electric and magnetic parts, we define the gravoelectric duality transformation by interchange of active and passive electric parts which amounts to interchange of the Ricci and Einstein tensors. It turns out that the vacuum equation is duality-invariant. We obtain solutions du... |
gr-qc/9708030 | Takeshi Chiba | Takeshi Chiba, Naoshi Sugiyama, and Jun'ichi Yokoyama | Imprints of the Metrically-coupled Dilaton on Density Perturbations in
Inflationary Cosmology | title changed, 20 pages, to appear in Nucl.Phys.B | Nucl.Phys. B530 (1998) 304-324 | 10.1016/S0550-3213(98)00412-X | null | gr-qc astro-ph | null | Spectra of density perturbations produced during chaotic inflation are
calculated, taking both adiabatic and isocurvature modes into account in a
class of scalar-tensor theories of gravity in which the dilaton is metrically
coupled. Comparing the predicted spectrum of the cosmic microwave background
radiation anisotr... | [
{
"created": "Fri, 15 Aug 1997 11:51:59 GMT",
"version": "v1"
},
{
"created": "Wed, 27 May 1998 03:57:03 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Chiba",
"Takeshi",
""
],
[
"Sugiyama",
"Naoshi",
""
],
[
"Yokoyama",
"Jun'ichi",
""
]
] | Spectra of density perturbations produced during chaotic inflation are calculated, taking both adiabatic and isocurvature modes into account in a class of scalar-tensor theories of gravity in which the dilaton is metrically coupled. Comparing the predicted spectrum of the cosmic microwave background radiation anisotrop... |
1806.07052 | Shahab Shahidi | Shahab Shahidi | Axionic extension of the Proca action | 12 pages | Phys. Rev. D 98, 084004 (2018) | 10.1103/PhysRevD.98.084004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of Cartan theory, we will show that the Proca action can be
obtained from the Gauss-Bonnet action for a special choice of the torsion
tensor. This in fact equivalent to the special case of the 4th vector Galileon
Lagrangian. The theory will then be promoted to contain an axion field. It will
be proved ... | [
{
"created": "Tue, 19 Jun 2018 05:53:46 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Sep 2018 04:43:00 GMT",
"version": "v2"
}
] | 2018-10-10 | [
[
"Shahidi",
"Shahab",
""
]
] | In the context of Cartan theory, we will show that the Proca action can be obtained from the Gauss-Bonnet action for a special choice of the torsion tensor. This in fact equivalent to the special case of the 4th vector Galileon Lagrangian. The theory will then be promoted to contain an axion field. It will be proved th... |
1011.0479 | Sarp Akcay | Sarp Akcay and Richard Matzner | Kerr-de Sitter Universe | 20 pages, 9 figures | Class.Quant.Grav.28:085012,2011 | 10.1088/0264-9381/28/8/085012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is now widely accepted that the universe as we understand it is
accelerating in expansion and fits the de Sitter model rather well. As such, a
realistic assumption of black holes must place them on a de Sitter background
and not Minkowski as is typically done in General Relativity. The most
astrophysically relevan... | [
{
"created": "Tue, 2 Nov 2010 00:15:45 GMT",
"version": "v1"
}
] | 2011-04-04 | [
[
"Akcay",
"Sarp",
""
],
[
"Matzner",
"Richard",
""
]
] | It is now widely accepted that the universe as we understand it is accelerating in expansion and fits the de Sitter model rather well. As such, a realistic assumption of black holes must place them on a de Sitter background and not Minkowski as is typically done in General Relativity. The most astrophysically relevant ... |
gr-qc/0610043 | Santiago Esteban Perez Bergliaffa | M. Novello, E. Goulart, J. M. Salim, S. E. Perez Bergliaffa | Cosmological Effects of Nonlinear Electrodynamics | null | Class.Quant.Grav.24:3021-3036,2007 | 10.1088/0264-9381/24/11/015 | null | gr-qc | null | It will be shown that a given realization of nonlinear electrodynamics, used
as source of Einstein's equations, generates a cosmological model with
interesting features, namely a phase of current cosmic acceleration, and the
absence of an initial singularity, thus pointing to a way to solve two
important problems in ... | [
{
"created": "Tue, 10 Oct 2006 18:35:57 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Novello",
"M.",
""
],
[
"Goulart",
"E.",
""
],
[
"Salim",
"J. M.",
""
],
[
"Bergliaffa",
"S. E. Perez",
""
]
] | It will be shown that a given realization of nonlinear electrodynamics, used as source of Einstein's equations, generates a cosmological model with interesting features, namely a phase of current cosmic acceleration, and the absence of an initial singularity, thus pointing to a way to solve two important problems in co... |
gr-qc/0203086 | Costas Glampedakis | Kostas Glampedakis and Daniel Kennefick | Zoom & Whirl: Eccentric equatorial orbits around spinning black holes
and their evolution under gravitational radiation reaction | RevteX, 47 pages, 16 figures, submitted to Phys. Rev. D | Phys.Rev. D66 (2002) 044002 | 10.1103/PhysRevD.66.044002 | null | gr-qc astro-ph | null | We study eccentric equatorial orbits of a test-body around a Kerr black hole
under the influence of gravitational radiation reaction. We have adopted a well
established two-step approach: assuming that the particle is moving along a
geodesic (justifiable as long as the orbital evolution is adiabatic) we
calculate num... | [
{
"created": "Mon, 25 Mar 2002 22:37:00 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Glampedakis",
"Kostas",
""
],
[
"Kennefick",
"Daniel",
""
]
] | We study eccentric equatorial orbits of a test-body around a Kerr black hole under the influence of gravitational radiation reaction. We have adopted a well established two-step approach: assuming that the particle is moving along a geodesic (justifiable as long as the orbital evolution is adiabatic) we calculate numer... |
1212.2870 | Lorenzo Reverberi | Lorenzo Reverberi | Curvature Singularities from Gravitational Contraction in f(R) Gravity | 12 pages, 7 figures. Major changes from previous version. Accepted
for publication in PRD | Phys. Rev. D 87, 084005 (2013) | 10.1103/PhysRevD.87.084005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The discovery of the accelerated expansion of the Universe has had a vast
resonance on a number of physical disciplines. In recent years several viable
modified gravity models have been proposed, which naturally lead to a late-time
de Sitter stage while basically reducing to General Relativity in the early
Universe. ... | [
{
"created": "Wed, 12 Dec 2012 16:31:02 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Dec 2012 14:55:37 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Dec 2012 15:15:33 GMT",
"version": "v3"
},
{
"created": "Thu, 3 Jan 2013 12:43:11 GMT",
"version": "v4"
},
{
"cr... | 2013-06-24 | [
[
"Reverberi",
"Lorenzo",
""
]
] | The discovery of the accelerated expansion of the Universe has had a vast resonance on a number of physical disciplines. In recent years several viable modified gravity models have been proposed, which naturally lead to a late-time de Sitter stage while basically reducing to General Relativity in the early Universe. We... |
1502.02198 | Stanley P. Gudder | Stan Gudder | Emergence of Four Dimensions in the Causal Set Approach to Discrete
Quantum Gravity | 25 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One could begin a study like the present one by simply postulating that our
universe is four-dimensional. There are ample reasons for doing this.
Experience, observation and experiment all point to the fact that we inhabit a
four-dimensional universe. Another approach would be to show that
four-dimensions arise natur... | [
{
"created": "Sun, 8 Feb 2015 00:28:07 GMT",
"version": "v1"
}
] | 2015-02-10 | [
[
"Gudder",
"Stan",
""
]
] | One could begin a study like the present one by simply postulating that our universe is four-dimensional. There are ample reasons for doing this. Experience, observation and experiment all point to the fact that we inhabit a four-dimensional universe. Another approach would be to show that four-dimensions arise natural... |
0907.0869 | Geoffrey Lovelace | Geoffrey Lovelace, Yanbei Chen, Michael Cohen, Jeffrey D. Kaplan, Drew
Keppel, Keith D. Matthews, David A. Nichols, Mark A. Scheel, Ulrich Sperhake | Momentum flow in black-hole binaries: II. Numerical simulations of
equal-mass, head-on mergers with antiparallel spins | Submitted to Phys. Rev. D | Phys.Rev.D82:064031,2010 | 10.1103/PhysRevD.82.064031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Research on extracting science from binary-black-hole (BBH) simulations has
often adopted a "scattering matrix" perspective: given the binary's initial
parameters, what are the final hole's parameters and the emitted gravitational
waveform? In contrast, we are using BBH simulations to explore the nonlinear
dynamics o... | [
{
"created": "Sun, 5 Jul 2009 15:40:40 GMT",
"version": "v1"
}
] | 2010-10-27 | [
[
"Lovelace",
"Geoffrey",
""
],
[
"Chen",
"Yanbei",
""
],
[
"Cohen",
"Michael",
""
],
[
"Kaplan",
"Jeffrey D.",
""
],
[
"Keppel",
"Drew",
""
],
[
"Matthews",
"Keith D.",
""
],
[
"Nichols",
"David A.",
""
],... | Research on extracting science from binary-black-hole (BBH) simulations has often adopted a "scattering matrix" perspective: given the binary's initial parameters, what are the final hole's parameters and the emitted gravitational waveform? In contrast, we are using BBH simulations to explore the nonlinear dynamics of ... |
gr-qc/9906083 | Alexei nesteruk | Edgard Gunzig, Alexei Nesteruk, Martin Stokley | Inflationary cosmology with two-component fluid and thermodynamics | 16 pages Latex | Gen.Rel.Grav. 32 (2000) 329-346 | 10.1023/A:1001939611746 | null | gr-qc | null | We present a simple and self-consistent cosmology with a phenomenological
model of quantum creation of radiation and matter due to decay of the
cosmological constant $\Lambda$. The decay drives a non-isentropic inflationary
epoch, which exits smoothly to the radiation-dominated era, without reheating,
and then evolve... | [
{
"created": "Fri, 18 Jun 1999 14:05:40 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Gunzig",
"Edgard",
""
],
[
"Nesteruk",
"Alexei",
""
],
[
"Stokley",
"Martin",
""
]
] | We present a simple and self-consistent cosmology with a phenomenological model of quantum creation of radiation and matter due to decay of the cosmological constant $\Lambda$. The decay drives a non-isentropic inflationary epoch, which exits smoothly to the radiation-dominated era, without reheating, and then evolves ... |
1802.02862 | Krishnakanta Bhattacharya | Krishnakanta Bhattacharya, Bibhas Ranjan Majhi | Noncommutative Heisenberg algebra in the neighbourhood of a generic null
surface | Modified version with several added comments, To appear in Nucl.
Phys. B | Nuclear Physics B 934 (2018) 557 | 10.1016/j.nuclphysb.2018.07.025 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the diffeomorphisms, which preserve the null nature for a
generic null metric very near to the null surface, provide {\it noncommutative}
Heisenberg algebra. This is the generalization of the earlier work (Phys. Rev.
D95, 044020 (2017)) \cite{Majhi:2017fua}, done for the Rindler horizon. The
present anal... | [
{
"created": "Thu, 8 Feb 2018 14:06:12 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Jul 2018 14:24:06 GMT",
"version": "v2"
}
] | 2018-08-07 | [
[
"Bhattacharya",
"Krishnakanta",
""
],
[
"Majhi",
"Bibhas Ranjan",
""
]
] | We show that the diffeomorphisms, which preserve the null nature for a generic null metric very near to the null surface, provide {\it noncommutative} Heisenberg algebra. This is the generalization of the earlier work (Phys. Rev. D95, 044020 (2017)) \cite{Majhi:2017fua}, done for the Rindler horizon. The present analys... |
2101.00657 | Panayiotis Stavrinos | Panayiotis Stavrinos and Christos Savvopoulos | Dark Gravitational Field on Riemannian and Sasaki Spacetime | 20 pages | Universe 6 (2020) 138 | 10.3390/universe6090138 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The aim of this paper is to provide the geometrical structure of a
gravitational field that includes the addition of dark matter in the framework
of a Riemannian and a Riemann--Sasaki spacetime. By means of the classical
Riemannian geometric methods we arrive at modified geodesic equations, tidal
forces, and Einstein... | [
{
"created": "Sun, 3 Jan 2021 16:31:01 GMT",
"version": "v1"
}
] | 2021-01-05 | [
[
"Stavrinos",
"Panayiotis",
""
],
[
"Savvopoulos",
"Christos",
""
]
] | The aim of this paper is to provide the geometrical structure of a gravitational field that includes the addition of dark matter in the framework of a Riemannian and a Riemann--Sasaki spacetime. By means of the classical Riemannian geometric methods we arrive at modified geodesic equations, tidal forces, and Einstein a... |
2210.03944 | Xuefeng Zhang | Chengjian Luo and Xuefeng Zhang | Effect of Earth-Moon's gravity on TianQin's range acceleration noise.
II. Impact of orbit selection | 8 pages, 9 figures | Phys. Rev. D 105, 102007 (2022) | 10.1103/PhysRevD.105.102007 | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | The paper is a sequel to our previous work (Zhang et al. Phys. Rev. D 103,
062001 (2021)). For proposed geocentric space-based gravitational wave
detectors such as TianQin, gLISA, and GADFLI, the gravity-field disturbances,
i.e., the so called ``orbital noise'', from the Earth-Moon system on the
sensitive intersatell... | [
{
"created": "Sat, 8 Oct 2022 07:21:19 GMT",
"version": "v1"
}
] | 2022-10-11 | [
[
"Luo",
"Chengjian",
""
],
[
"Zhang",
"Xuefeng",
""
]
] | The paper is a sequel to our previous work (Zhang et al. Phys. Rev. D 103, 062001 (2021)). For proposed geocentric space-based gravitational wave detectors such as TianQin, gLISA, and GADFLI, the gravity-field disturbances, i.e., the so called ``orbital noise'', from the Earth-Moon system on the sensitive intersatellit... |
1612.07279 | Victor Shchigolev Konstantinovich | V.K. Shchigolev, D.N. Bezbatko | Studying Gravitational Deflection of Light by Kiselev Black Hole via
Homotopy Perturbation Method | 16 pages, 2 figures, matches version accepted for publication in
General Relativity and Gravitation | General Relativity and Gravitation (2019) 51:34 | 10.1007/s10714-019-2521-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the homotopy-perturbation method (HPM) is applied to obtain
approximate analytical solutions for the gravitational deflection of light in
General Relativity near Schwarzschild black hole surrounded by quintessence
(Kiselev black hole). In order to demonstrate that HPM is able to yield
acceptable soluti... | [
{
"created": "Wed, 21 Dec 2016 19:15:50 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Mar 2017 14:46:07 GMT",
"version": "v2"
},
{
"created": "Thu, 16 Mar 2017 13:49:11 GMT",
"version": "v3"
},
{
"created": "Mon, 11 Feb 2019 07:09:51 GMT",
"version": "v4"
}
] | 2019-02-22 | [
[
"Shchigolev",
"V. K.",
""
],
[
"Bezbatko",
"D. N.",
""
]
] | In this paper, the homotopy-perturbation method (HPM) is applied to obtain approximate analytical solutions for the gravitational deflection of light in General Relativity near Schwarzschild black hole surrounded by quintessence (Kiselev black hole). In order to demonstrate that HPM is able to yield acceptable solution... |
1201.1638 | Cosimo Bambi | Cosimo Bambi | Testing the Kerr-nature of stellar-mass black hole candidates by
combining the continuum-fitting method and the power estimate of transient
ballistic jets | 8 pages, 6 figures. v2: some typos corrected | Phys.Rev.D85:043002,2012 | 10.1103/PhysRevD.85.043002 | LMU-ASC-29-12 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Astrophysical black hole candidates are thought to be the Kerr black holes
predicted by General Relativity, as these objects cannot be explained otherwise
without introducing new physics. However, there is no observational evidence
that the space-time around them is really described by the Kerr solution. The
Kerr bla... | [
{
"created": "Sun, 8 Jan 2012 15:56:51 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Jan 2012 02:30:44 GMT",
"version": "v2"
}
] | 2015-03-20 | [
[
"Bambi",
"Cosimo",
""
]
] | Astrophysical black hole candidates are thought to be the Kerr black holes predicted by General Relativity, as these objects cannot be explained otherwise without introducing new physics. However, there is no observational evidence that the space-time around them is really described by the Kerr solution. The Kerr black... |
2101.12716 | Leonardo Garc\'ia-Heveling | Leonardo Garc\'ia-Heveling | Causality theory of spacetimes with continuous Lorentzian metrics
revisited | Significant changes in v2: notation changed, references added,
numbering of theorems shifted. 12 pages, 2 figures, 1 table | Class. Quantum Grav. 38 (2021) 145028 | 10.1088/1361-6382/ac067a | null | gr-qc math-ph math.DG math.MP | http://creativecommons.org/licenses/by/4.0/ | We consider the usual causal structure $(I^+,J^+)$ on a spacetime, and a
number of alternatives based on Minguzzi's $D^+$ and Sorkin and Woolgar's
$K^+$, in the case where the spacetime metric is continuous, but not
necessarily smooth. We compare the different causal structures based on three
key properties, namely t... | [
{
"created": "Fri, 29 Jan 2021 18:25:52 GMT",
"version": "v1"
},
{
"created": "Mon, 17 May 2021 14:06:02 GMT",
"version": "v2"
}
] | 2021-06-30 | [
[
"García-Heveling",
"Leonardo",
""
]
] | We consider the usual causal structure $(I^+,J^+)$ on a spacetime, and a number of alternatives based on Minguzzi's $D^+$ and Sorkin and Woolgar's $K^+$, in the case where the spacetime metric is continuous, but not necessarily smooth. We compare the different causal structures based on three key properties, namely the... |
gr-qc/0701048 | Margus Saal | Piret Kuusk, Laur Jarv, Margus Saal | The dynamics of scalar-tensor cosmology from RS two-brane model | 3 pages, 2 figures, to appear in Proc. of 11th Marcel Grossmann
Meeting (Berlin, July 23-29, 2006) | null | 10.1142/9789812834300_0533 | FI 1 -2007 | gr-qc | null | We consider Randall-Sundrum two-brane cosmological model in the low energy
gradient expansion approximation by Kanno and Soda. It is a scalar-tensor
theory with a specific coupling function. We find a first integral of equations
for the A-brane metric and estimate constraints for the dark radiation term. We
perform a... | [
{
"created": "Mon, 8 Jan 2007 09:25:43 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Kuusk",
"Piret",
""
],
[
"Jarv",
"Laur",
""
],
[
"Saal",
"Margus",
""
]
] | We consider Randall-Sundrum two-brane cosmological model in the low energy gradient expansion approximation by Kanno and Soda. It is a scalar-tensor theory with a specific coupling function. We find a first integral of equations for the A-brane metric and estimate constraints for the dark radiation term. We perform a c... |
2004.07269 | Emmanuel Frion | E. Frion, N. Pinto-Neto, S.D.P. Vitenti, S.E. Perez Bergliaffa | Primordial Magnetogenesis in a Bouncing Universe | 33 pages, 9 figures. Matches the published version in Physical Review
D | Phys. Rev. D 101, 103503 (2020) | 10.1103/PhysRevD.101.103503 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate primordial magnetogenesis and the evolution of the
electromagnetic field through a quantum bounce, in a model that starts in the
far past from a contracting phase where only dust is present and the
electromagnetic field is in the adiabatic quantum vacuum state. By including a
coupling between curvature... | [
{
"created": "Wed, 15 Apr 2020 18:04:12 GMT",
"version": "v1"
},
{
"created": "Thu, 7 May 2020 21:52:10 GMT",
"version": "v2"
}
] | 2020-05-11 | [
[
"Frion",
"E.",
""
],
[
"Pinto-Neto",
"N.",
""
],
[
"Vitenti",
"S. D. P.",
""
],
[
"Bergliaffa",
"S. E. Perez",
""
]
] | We investigate primordial magnetogenesis and the evolution of the electromagnetic field through a quantum bounce, in a model that starts in the far past from a contracting phase where only dust is present and the electromagnetic field is in the adiabatic quantum vacuum state. By including a coupling between curvature a... |
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