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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9503026 | Masaru Siino | Shuxue Ding, Yasushige Maeda and Masaru Siino | Four Dimensional Quantum Topology Changes of Spacetimes | 26 pages, revtex, 13 figures. The calculation of volume and
grammatical errors are corrected | J.Math.Phys. 37 (1996) 5611-5626 | 10.1063/1.531725 | KUNS-1322; TIT/HEP-282/COSMO-52 | gr-qc hep-th | null | We investigate topology changing processes in the WKB approximation of four
dimensional quantum cosmology with a negative cosmological constant. As
Riemannian manifolds which describe quantum tunnelings of spacetime we consider
constant negative curvature solutions of the Einstein equation i.e. hyperbolic
geometries.... | [
{
"created": "Thu, 16 Mar 1995 07:04:37 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Apr 1996 12:20:34 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Ding",
"Shuxue",
""
],
[
"Maeda",
"Yasushige",
""
],
[
"Siino",
"Masaru",
""
]
] | We investigate topology changing processes in the WKB approximation of four dimensional quantum cosmology with a negative cosmological constant. As Riemannian manifolds which describe quantum tunnelings of spacetime we consider constant negative curvature solutions of the Einstein equation i.e. hyperbolic geometries. U... |
1407.5678 | Matt Visser | Petarpa Boonserm (Chulalongkorn University), Tritos Ngampitipan
(Chulalongkorn University), and Matt Visser (Victoria University of
Wellington) | Super-radiance and flux conservation | V1: 8 pages; no figures; V2: 6 references added, no physics changes,
now 9 pages | Phys. Rev. D 90, 064013 (2014) | 10.1103/PhysRevD.90.064013 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The theoretical foundations of the phenomenon known as super-radiance still
continues to attract considerable attention. Despite many valiant attempts at
pedagogically clear presentations, the effect nevertheless still continues to
generate some significant confusion. Part of the confusion arises from the fact
that s... | [
{
"created": "Mon, 21 Jul 2014 22:22:34 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Jul 2014 07:01:28 GMT",
"version": "v2"
}
] | 2014-09-17 | [
[
"Boonserm",
"Petarpa",
"",
"Chulalongkorn University"
],
[
"Ngampitipan",
"Tritos",
"",
"Chulalongkorn University"
],
[
"Visser",
"Matt",
"",
"Victoria University of\n Wellington"
]
] | The theoretical foundations of the phenomenon known as super-radiance still continues to attract considerable attention. Despite many valiant attempts at pedagogically clear presentations, the effect nevertheless still continues to generate some significant confusion. Part of the confusion arises from the fact that sup... |
0904.1338 | M. Hossein Dehghani | M. H. Dehghani and N. Farhangkhah | Static and Radiating Solutions of Lovelock Gravity in the Presence of a
Perfect Fluid | 15 pages, two figures | Phys.Lett.B674:243-249, 2009 | 10.1016/j.physletb.2009.03.045 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a general solution of third order Lovelock gravity in the presence
of a specific type II perfect fluid. This solution for linear equation of
state, $p=w(\rho-4B)$ contains all the known solutions of third order Lovelock
gravity in the literature and some new static and radiating solutions for
different val... | [
{
"created": "Wed, 8 Apr 2009 13:32:11 GMT",
"version": "v1"
}
] | 2014-11-18 | [
[
"Dehghani",
"M. H.",
""
],
[
"Farhangkhah",
"N.",
""
]
] | We present a general solution of third order Lovelock gravity in the presence of a specific type II perfect fluid. This solution for linear equation of state, $p=w(\rho-4B)$ contains all the known solutions of third order Lovelock gravity in the literature and some new static and radiating solutions for different value... |
2211.09674 | Asher Yahalom PhD | Asher Yahalom | The Primordial Particle Accelerator of the Cosmos | 28 pages, 24 figures. arXiv admin note: text overlap with
arXiv:gr-qc/0611124 | Universe 8, no. 11: 594, 2022 | 10.3390/universe8110594 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | In a previous paper we have shown that superluminal particles are allowed by
the general relativistic theory of gravity provided that the metric is locally
Euclidean. Here we calculate the probability density function of a canonical
ensemble of superluminal particles as function of temperature. This is done for
both ... | [
{
"created": "Tue, 15 Nov 2022 12:52:44 GMT",
"version": "v1"
}
] | 2022-11-18 | [
[
"Yahalom",
"Asher",
""
]
] | In a previous paper we have shown that superluminal particles are allowed by the general relativistic theory of gravity provided that the metric is locally Euclidean. Here we calculate the probability density function of a canonical ensemble of superluminal particles as function of temperature. This is done for both sp... |
1902.05670 | J\"org Frauendiener | Boris Daszuta and J\"org Frauendiener | Numerical initial data deformation exploiting a gluing construction: I.
Exterior asymptotic Schwarzschild | null | null | 10.1088/1361-6382/ab34d8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work a new numerical technique to prepare Cauchy data for the initial
value problem (IVP) formulation of Einstein's field equations is presented.
Directly inspired by the exterior asymptotic gluing (EAG) result of Corvino
(2000) our (pseudo)-spectral scheme is demonstrated under the assumption of
axisymmetry ... | [
{
"created": "Fri, 15 Feb 2019 03:16:38 GMT",
"version": "v1"
}
] | 2019-09-04 | [
[
"Daszuta",
"Boris",
""
],
[
"Frauendiener",
"Jörg",
""
]
] | In this work a new numerical technique to prepare Cauchy data for the initial value problem (IVP) formulation of Einstein's field equations is presented. Directly inspired by the exterior asymptotic gluing (EAG) result of Corvino (2000) our (pseudo)-spectral scheme is demonstrated under the assumption of axisymmetry so... |
2202.09126 | Igor Bogush M.Sc. | Kirill Kobialko, Igor Bogush, Dmitri Gal'tsov | Slice-reducible conformal Killing tensors, photon surfaces and shadows | 44 pages, revtex4 | null | 10.1103/PhysRevD.106.024006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize our recent method for constructing Killing tensors of the
second rank to conformal Killing tensors. The method is intended for foliated
spacetimes of arbitrary dimension $m$, which have a set of conformal Killing
vectors. It applies to foliations of a more general structure than in previous
literature. ... | [
{
"created": "Fri, 18 Feb 2022 11:15:05 GMT",
"version": "v1"
}
] | 2022-07-20 | [
[
"Kobialko",
"Kirill",
""
],
[
"Bogush",
"Igor",
""
],
[
"Gal'tsov",
"Dmitri",
""
]
] | We generalize our recent method for constructing Killing tensors of the second rank to conformal Killing tensors. The method is intended for foliated spacetimes of arbitrary dimension $m$, which have a set of conformal Killing vectors. It applies to foliations of a more general structure than in previous literature. Th... |
gr-qc/0009059 | Sean C. Ahern | Sean C. Ahern, John W. Norbury and William J. Poyser | Graviton Production in Relativistic Heavy-Ion Collisions | 10 pages, 3 figures, accepted for publication in Physical Review D | Phys.Rev.D62:116001,2000 | 10.1103/PhysRevD.62.116001 | null | gr-qc hep-ph | null | We study the feasibility of producing the graviton of the novel Kaluza-Klein
theory in which there are d large compact dimensions in addition to the 4
dimensions of Minkowski spacetime. We calculate the cross section for producing
such a graviton in nucleus-nucleus collisions via t-channel photon-photon
fusion using ... | [
{
"created": "Sun, 17 Sep 2000 03:07:26 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ahern",
"Sean C.",
""
],
[
"Norbury",
"John W.",
""
],
[
"Poyser",
"William J.",
""
]
] | We study the feasibility of producing the graviton of the novel Kaluza-Klein theory in which there are d large compact dimensions in addition to the 4 dimensions of Minkowski spacetime. We calculate the cross section for producing such a graviton in nucleus-nucleus collisions via t-channel photon-photon fusion using th... |
1605.02325 | Aleksander Stachowski | Marek Szydlowski, Aleksander Stachowski | Does the diffusion DM-DE interaction model solve cosmological puzzles? | 27 pages, 17 figures | Phys. Rev. D 94, 043521 (2016) | 10.1103/PhysRevD.94.043521 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study dynamics of cosmological models with diffusion effects modeling dark
matter and dark energy interactions. We show the simple model with diffusion
between the cosmological constant sector and dark matter, where the canonical
scaling law of dark matter $(\rho_{dm,0}a^{-3}(t))$ is modified by an additive
$\epsi... | [
{
"created": "Sun, 8 May 2016 15:35:18 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Szydlowski",
"Marek",
""
],
[
"Stachowski",
"Aleksander",
""
]
] | We study dynamics of cosmological models with diffusion effects modeling dark matter and dark energy interactions. We show the simple model with diffusion between the cosmological constant sector and dark matter, where the canonical scaling law of dark matter $(\rho_{dm,0}a^{-3}(t))$ is modified by an additive $\epsilo... |
1111.2318 | Jose Socorro Garcia | J. Socorro, Paulo A. Rodr\'iguez, Abraham Espinoza-Garc\'ia, Luis O.
Pimentel and Priscila Romero | Cosmological Bianchi Class A models in S\'aez-Ballester theory | 24 pages; ISBN: 978-953-307-626-3, InTech | Aspects of Today's Cosmology, Antonio Alfonso-Faus (Ed.), 2011,
pages 185-204 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the S\'aez-Ballester (SB) theory on anisotropic Bianchi Class A
cosmological model, with barotropic fluid and cosmological constant, using the
Hamilton or Hamilton-Jacobi approach. Contrary to claims in the specialized
literature, it is shown that the S\'aez-Ballester theory cannot provide a
realistic solution... | [
{
"created": "Wed, 9 Nov 2011 20:26:04 GMT",
"version": "v1"
}
] | 2011-11-10 | [
[
"Socorro",
"J.",
""
],
[
"Rodríguez",
"Paulo A.",
""
],
[
"Espinoza-García",
"Abraham",
""
],
[
"Pimentel",
"Luis O.",
""
],
[
"Romero",
"Priscila",
""
]
] | We use the S\'aez-Ballester (SB) theory on anisotropic Bianchi Class A cosmological model, with barotropic fluid and cosmological constant, using the Hamilton or Hamilton-Jacobi approach. Contrary to claims in the specialized literature, it is shown that the S\'aez-Ballester theory cannot provide a realistic solution t... |
1504.00870 | Lavinia Heisenberg | Luc Blanchet and Lavinia Heisenberg | Dark Matter via Massive (bi-)Gravity | 7 pages, references added, typos corrected, journal version | null | 10.1103/PhysRevD.91.103518 | NORDITA-2015-38 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we investigate the existence of relativistic models for dark
matter in the context of bimetric gravity, used here to reproduce the modified
Newtonian dynamics (MOND) at galactic scales. For this purpose we consider two
different species of dark matter particles that separately couple to the two
metrics o... | [
{
"created": "Fri, 3 Apr 2015 15:56:14 GMT",
"version": "v1"
},
{
"created": "Wed, 6 May 2015 13:28:18 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Blanchet",
"Luc",
""
],
[
"Heisenberg",
"Lavinia",
""
]
] | In this work we investigate the existence of relativistic models for dark matter in the context of bimetric gravity, used here to reproduce the modified Newtonian dynamics (MOND) at galactic scales. For this purpose we consider two different species of dark matter particles that separately couple to the two metrics of ... |
gr-qc/9901034 | Edward N. Glass | E.N. Glass and J.P. Krisch (Department of Physics, University of
Michigan, Ann Arbor, Michgan) | Two-Fluid Atmosphere for Relativistic Stars | to appear in Classical and Quantum Gravity | Class.Quant.Grav. 16 (1999) 1175-1184 | 10.1088/0264-9381/16/4/007 | null | gr-qc | null | We have extended the Vaidya radiating metric to include both a radiation
fluid and a string fluid. This paper expands our brief introduction to
extensions of the Schwarzschild vacuum which appeared in 1998 Phys. Rev. D Vol
57, R5945. Assuming diffusive transport for the string fluid, we find new
analytic solutions of... | [
{
"created": "Wed, 13 Jan 1999 02:46:38 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Glass",
"E. N.",
"",
"Department of Physics, University of\n Michigan, Ann Arbor, Michgan"
],
[
"Krisch",
"J. P.",
"",
"Department of Physics, University of\n Michigan, Ann Arbor, Michgan"
]
] | We have extended the Vaidya radiating metric to include both a radiation fluid and a string fluid. This paper expands our brief introduction to extensions of the Schwarzschild vacuum which appeared in 1998 Phys. Rev. D Vol 57, R5945. Assuming diffusive transport for the string fluid, we find new analytic solutions of E... |
gr-qc/0003057 | Thomas P. Kling | Thomas P. Kling, Ezra T. Newman, and Alejandro Perez | Comparative Studies of Lensing Methods | 23 pages, 15 figures, corrected version | Phys.Rev.D62:024025,2000; Erratum-ibid.D62:109901,2000 | 10.1103/PhysRevD.62.024025 10.1103/PhysRevD.62.109901 | null | gr-qc astro-ph | null | Predictions of the standard thin lens approximation and a new iterative
approach to gravitational lensing are compared with an ``exact'' approach in
simple test cases involving one or two lenses. We show that the thin lens and
iterative approaches are remarkably accurate in predicting time delays, source
positions an... | [
{
"created": "Tue, 14 Mar 2000 19:06:59 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Aug 2000 15:07:48 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Sep 2000 00:11:04 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Kling",
"Thomas P.",
""
],
[
"Newman",
"Ezra T.",
""
],
[
"Perez",
"Alejandro",
""
]
] | Predictions of the standard thin lens approximation and a new iterative approach to gravitational lensing are compared with an ``exact'' approach in simple test cases involving one or two lenses. We show that the thin lens and iterative approaches are remarkably accurate in predicting time delays, source positions and ... |
0903.2270 | Simone Mercuri | Simone Mercuri | A possible topological interpretation of the Barbero-Immirzi parameter | 10 pages, based on a talk given at the III Stueckelberg workshop on
Relativistic Field Theories, July 8-18, 2008, Pescara (Italy). V2: minor
corrections in section II, major corrections in section IV | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A possible topological interpretation of the Barbero-Immirzi parameter is
proposed. Classically, by generalizing the Holst action to torsional
spacetimes, we construct a precise analogy between the Barbero--Immirzi
parameter and the $\theta$-angle of Yang-Mills gauge theories, where the role
of the Pontryagin class i... | [
{
"created": "Thu, 12 Mar 2009 21:05:27 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Apr 2009 23:50:26 GMT",
"version": "v2"
}
] | 2009-04-12 | [
[
"Mercuri",
"Simone",
""
]
] | A possible topological interpretation of the Barbero-Immirzi parameter is proposed. Classically, by generalizing the Holst action to torsional spacetimes, we construct a precise analogy between the Barbero--Immirzi parameter and the $\theta$-angle of Yang-Mills gauge theories, where the role of the Pontryagin class is ... |
gr-qc/0206064 | Saulo Carneiro | Saulo Carneiro | Holography and the Cosmic Coincidence | RevTex, 4 pages, no figures | null | null | null | gr-qc astro-ph hep-th | null | Based on an analysis of the entropy associated to the vacuum quantum
fluctuations, we show that the holographic principle, applied to the cosmic
scale, constitutes a possible explanation for the observed value of the
cosmological constant, theoretically justifying a relation proposed 35 years
ago by Zel'dovich. Furth... | [
{
"created": "Thu, 20 Jun 2002 18:27:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Carneiro",
"Saulo",
""
]
] | Based on an analysis of the entropy associated to the vacuum quantum fluctuations, we show that the holographic principle, applied to the cosmic scale, constitutes a possible explanation for the observed value of the cosmological constant, theoretically justifying a relation proposed 35 years ago by Zel'dovich. Further... |
2104.04995 | Sergey Yu. Vernov | Ekaterina O. Pozdeeva, Sergey Yu. Vernov | Construction of inflationary scenarios with the Gauss-Bonnet term and
nonminimal coupling | 11 pages, 5 figures, v2: minor corrections, references are added, to
appear in EPJC | Eur. Phys. J. C 81 (2021) 633 | 10.1140/epjc/s10052-021-09435-8 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inflationary models with a scalar field nonminimally coupled both with the
Ricci scalar and with the Gauss-Bonnet term are studied. We propose the way of
generalization of inflationary scenarios with the Gauss-Bonnet term and a
scalar field minimally coupled with the Ricci scalar to the corresponding
scenarios with a... | [
{
"created": "Sun, 11 Apr 2021 11:27:11 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Jul 2021 17:27:19 GMT",
"version": "v2"
}
] | 2021-07-21 | [
[
"Pozdeeva",
"Ekaterina O.",
""
],
[
"Vernov",
"Sergey Yu.",
""
]
] | Inflationary models with a scalar field nonminimally coupled both with the Ricci scalar and with the Gauss-Bonnet term are studied. We propose the way of generalization of inflationary scenarios with the Gauss-Bonnet term and a scalar field minimally coupled with the Ricci scalar to the corresponding scenarios with a s... |
1406.3186 | Marcello Ortaggio | Marcello Ortaggio | Asymptotic behaviour of Maxwell fields in higher dimensions | 23 pages. v2: new appendix A summarizes the definitions of the Ricci
rotation coefficients; several technical details moved to new appendix B;
former footnote 8 was not precise and has been removed; added/fixed
references, typos corrected | Phys. Rev. D 90, 124020 (2014) | 10.1103/PhysRevD.90.124020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the fall-off behaviour of test electromagnetic fields in higher
dimensions as one approaches infinity along a congruence of "expanding" null
geodesics. The considered backgrounds are Einstein spacetimes including, in
particular, (asymptotically) flat and (anti-)de Sitter spacetimes. Various
possible boundary... | [
{
"created": "Thu, 12 Jun 2014 10:33:55 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Mar 2015 15:13:09 GMT",
"version": "v2"
}
] | 2015-03-04 | [
[
"Ortaggio",
"Marcello",
""
]
] | We study the fall-off behaviour of test electromagnetic fields in higher dimensions as one approaches infinity along a congruence of "expanding" null geodesics. The considered backgrounds are Einstein spacetimes including, in particular, (asymptotically) flat and (anti-)de Sitter spacetimes. Various possible boundary c... |
1603.07281 | Otakar Svitek | T. Tahamtan and O. Svitek | Properties of Robinson--Trautman solution with scalar hair | 2 figures | Phys. Rev. D 94, 064031 (2016) | 10.1103/PhysRevD.94.064031 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | An explicit Robinson--Trautman solution with minimally coupled free scalar
field was derived and analyzed recently. It was shown that this solution
possesses a curvature singularity which is initially naked but later enveloped
by a horizon. However, this study concentrated on the general branch of the
solution where ... | [
{
"created": "Wed, 23 Mar 2016 17:32:29 GMT",
"version": "v1"
},
{
"created": "Fri, 6 May 2016 13:14:49 GMT",
"version": "v2"
},
{
"created": "Thu, 25 Aug 2016 11:43:25 GMT",
"version": "v3"
}
] | 2016-09-16 | [
[
"Tahamtan",
"T.",
""
],
[
"Svitek",
"O.",
""
]
] | An explicit Robinson--Trautman solution with minimally coupled free scalar field was derived and analyzed recently. It was shown that this solution possesses a curvature singularity which is initially naked but later enveloped by a horizon. However, this study concentrated on the general branch of the solution where al... |
2002.02688 | Dieter Van den Bleeken | Mert Ergen, Efe Hamamci and Dieter Van den Bleeken | Oddity in nonrelativistic, strong gravity | 24 pages + appendices. Version accepted for publication by EPJC.
Subsection 4.4 on possible phenomenological applications added | null | 10.1140/epjc/s10052-020-8112-6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the presence of odd powers of the speed of light $c$ in the
covariant nonrelativistic expansion of General Relativity (GR). The term of
order $c$ in the relativistic metric is a vector potential that contributes at
leading order in this expansion and describes strong gravitational effects
outside the (pos... | [
{
"created": "Fri, 7 Feb 2020 09:49:55 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Jun 2020 10:14:17 GMT",
"version": "v2"
}
] | 2020-07-15 | [
[
"Ergen",
"Mert",
""
],
[
"Hamamci",
"Efe",
""
],
[
"Bleeken",
"Dieter Van den",
""
]
] | We consider the presence of odd powers of the speed of light $c$ in the covariant nonrelativistic expansion of General Relativity (GR). The term of order $c$ in the relativistic metric is a vector potential that contributes at leading order in this expansion and describes strong gravitational effects outside the (post-... |
1212.5355 | Sang Pyo Kim | Sang Pyo Kim | Third Quantization and Quantum Universes | LaTex 8 pages, no figure; 9th CosPA (Cosmology and Particle
Astrophysics) Proceedings | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the third quantization of the Friedmann-Robertson-Walker cosmology
with $N$-minimal massless fields. The third quantized Hamiltonian for the WDW
equation in the minisuperspace consists of infinite number of intrinsic
time-dependent, decoupled oscillators. The Hamiltonian has a pair of invariant
operators for... | [
{
"created": "Fri, 21 Dec 2012 08:10:31 GMT",
"version": "v1"
}
] | 2012-12-24 | [
[
"Kim",
"Sang Pyo",
""
]
] | We study the third quantization of the Friedmann-Robertson-Walker cosmology with $N$-minimal massless fields. The third quantized Hamiltonian for the WDW equation in the minisuperspace consists of infinite number of intrinsic time-dependent, decoupled oscillators. The Hamiltonian has a pair of invariant operators for e... |
gr-qc/0511145 | Hideaki Kudoh | Hideaki Kudoh, Atsushi Taruya, Takashi Hiramatsu, Yoshiaki Himemoto | Detecting a gravitational-wave background with next-generation space
interferometers | 19 pages, 6 figures, references added, typos corrected | Phys.Rev. D73 (2006) 064006 | 10.1103/PhysRevD.73.064006 | null | gr-qc astro-ph | null | Future missions of gravitational-wave astronomy will be operated by
space-based interferometers, covering very wide range of frequency. Search for
stochastic gravitational-wave backgrounds (GWBs) is one of the main targets for
such missions, and we here discuss the prospects for direct measurement of
isotropic and an... | [
{
"created": "Sun, 27 Nov 2005 19:24:09 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Dec 2005 15:01:06 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Kudoh",
"Hideaki",
""
],
[
"Taruya",
"Atsushi",
""
],
[
"Hiramatsu",
"Takashi",
""
],
[
"Himemoto",
"Yoshiaki",
""
]
] | Future missions of gravitational-wave astronomy will be operated by space-based interferometers, covering very wide range of frequency. Search for stochastic gravitational-wave backgrounds (GWBs) is one of the main targets for such missions, and we here discuss the prospects for direct measurement of isotropic and anis... |
1401.6745 | Anirban Saha Dr. | Gour Bhattacharya, Pradip Mukherjee, Anirban Saha, Amit Singha Roy | The role of potential in the ghost-condensate dark energy model | A new sub-section added, 13 pages, 3 figures, LaTex. paper thoroughly
rewritten. arXiv admin note: substantial text overlap with arXiv:1301.4746;
and text overlap with arXiv:1008.2182 by other authors | Eur.Phys.J. C75 (2015) 2, 84 | 10.1140/epjc/s10052-015-3301-4 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the ghost-condensate model of dark energy with a generic
potential term. The inclusion of the potential is shown to give greater freedom
in realising the phantom regime. The self-consistency of the analysis is
demonstrated using WMAP7+BAO+Hubble data.
| [
{
"created": "Mon, 27 Jan 2014 05:50:20 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Oct 2014 07:02:21 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Dec 2014 05:57:14 GMT",
"version": "v3"
}
] | 2015-06-03 | [
[
"Bhattacharya",
"Gour",
""
],
[
"Mukherjee",
"Pradip",
""
],
[
"Saha",
"Anirban",
""
],
[
"Roy",
"Amit Singha",
""
]
] | We consider the ghost-condensate model of dark energy with a generic potential term. The inclusion of the potential is shown to give greater freedom in realising the phantom regime. The self-consistency of the analysis is demonstrated using WMAP7+BAO+Hubble data. |
1306.1801 | Michael Holst | Michael Holst, Gantumur Tsogtgerel | The Lichnerowicz equation on compact manifolds with boundary | 33 pages, no figures. Version 2 is a minor revision based on comments
received during review | null | 10.1088/0264-9381/30/20/205011 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we initiate a systematic study of the well-posedness theory
of the Einstein constraint equations on compact manifolds with boundary. This
is an important problem in general relativity, and it is particularly important
in numerical relativity, as it arises in models of Cauchy surfaces containing
asympt... | [
{
"created": "Fri, 7 Jun 2013 18:16:59 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Sep 2013 04:33:20 GMT",
"version": "v2"
}
] | 2015-06-16 | [
[
"Holst",
"Michael",
""
],
[
"Tsogtgerel",
"Gantumur",
""
]
] | In this article we initiate a systematic study of the well-posedness theory of the Einstein constraint equations on compact manifolds with boundary. This is an important problem in general relativity, and it is particularly important in numerical relativity, as it arises in models of Cauchy surfaces containing asymptot... |
1908.03814 | Richard Woodard | A. Kyriazis (U. Crete), S. P. Miao (NCKU), N. C. Tsamis (U. Crete) and
R. P. Woodard (UF) | The Inflaton Effective Potential for General $\epsilon$ | 21 pages, 9 figures, uses LaTeX 2e. Version 2 revised for
publication, including 2 new figures and 6 pages of new text to show, among
other things, that our approximations apply as well to plateau potentials | Phys. Rev. D 102, 025024 (2020) | 10.1103/PhysRevD.102.025024 | UFIFT-QG-19-05 , CCTP-2019-8 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop an analytic approximation for the coincidence limit of a massive
scalar propagator in an arbitrary spatially flat, homogeneous and isotropic
geometry. We employ this to compute the one loop corrections to the inflaton
effective potential from a quadratic coupling to a minimally coupled scalar. We
also exte... | [
{
"created": "Sat, 10 Aug 2019 21:51:06 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Jul 2020 16:53:08 GMT",
"version": "v2"
}
] | 2020-08-05 | [
[
"Kyriazis",
"A.",
"",
"U. Crete"
],
[
"Miao",
"S. P.",
"",
"NCKU"
],
[
"Tsamis",
"N. C.",
"",
"U. Crete"
],
[
"Woodard",
"R. P.",
"",
"UF"
]
] | We develop an analytic approximation for the coincidence limit of a massive scalar propagator in an arbitrary spatially flat, homogeneous and isotropic geometry. We employ this to compute the one loop corrections to the inflaton effective potential from a quadratic coupling to a minimally coupled scalar. We also extend... |
2004.06769 | \"Ozcan Sert | \"Ozcan Sert, Fatma \c{C}el\.ikta\c{s} | Noether Symmetry Approach to the Non-Minimally Coupled $Y(R)F^2$ Gravity | 14 pages, 2 figures | Eur. Phys. J. C 80, 653 (2020) | 10.1140/epjc/s10052-020-8237-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use Noether symmetry approach to find spherically symmetric static
solutions of the non-minimally coupled electromagnetic fields to gravity. We
construct the point-like Lagrangian under the spherical symmetry assumption.
Then we determine Noether symmetry and the corresponding conserved charge. We
derive Euler-Lag... | [
{
"created": "Tue, 14 Apr 2020 19:35:59 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Jul 2020 03:43:44 GMT",
"version": "v2"
}
] | 2020-07-28 | [
[
"Sert",
"Özcan",
""
],
[
"Çeliktaş",
"Fatma",
""
]
] | We use Noether symmetry approach to find spherically symmetric static solutions of the non-minimally coupled electromagnetic fields to gravity. We construct the point-like Lagrangian under the spherical symmetry assumption. Then we determine Noether symmetry and the corresponding conserved charge. We derive Euler-Lagra... |
gr-qc/0602004 | Brendan Foster | Brendan Z. Foster | Radiation Damping in Einstein-Aether Theory | 25 pages, 1 figure; v2: added comments and references; v3: cosmetics;
v4: corrected error in spin-1 portion of calculation; v5: fixed typos in
Eqns. (80,85) | Phys.Rev.D73:104012,2006; Erratum-ibid.D75:129904,2007 | 10.1103/PhysRevD.73.104012 10.1103/PhysRevD.75.129904 | null | gr-qc astro-ph hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work concerns the loss of energy of a material system due to
gravitational radiation in Einstein-aether theory-an alternative theory of
gravity in which the metric couples to a dynamical, timelike, unit-norm vector
field. Derived to lowest post-Newtonian order are waveforms for the metric and
vector fields far f... | [
{
"created": "Wed, 1 Feb 2006 20:50:00 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Apr 2006 19:14:41 GMT",
"version": "v2"
},
{
"created": "Thu, 4 May 2006 19:26:11 GMT",
"version": "v3"
},
{
"created": "Wed, 12 Sep 2007 09:50:06 GMT",
"version": "v4"
},
{
"cre... | 2014-11-17 | [
[
"Foster",
"Brendan Z.",
""
]
] | This work concerns the loss of energy of a material system due to gravitational radiation in Einstein-aether theory-an alternative theory of gravity in which the metric couples to a dynamical, timelike, unit-norm vector field. Derived to lowest post-Newtonian order are waveforms for the metric and vector fields far fro... |
0709.3947 | Jose Geraldo Pereira | R. Aldrovandi, J. P. Beltran Almeida, C. S. O. Mayor and J. G. Pereira | Lorentz transformations in de Sitter relativity | 7 pages, no figures | null | null | null | gr-qc hep-th | null | The properties of Lorentz transformations in de Sitter relativity are
studied. It is shown that, in addition to leaving invariant the velocity of
light, they also leave invariant the length-scale related to the curvature of
the de Sitter spacetime. The basic conclusion is that it is possible to have an
invariant leng... | [
{
"created": "Tue, 25 Sep 2007 16:34:36 GMT",
"version": "v1"
}
] | 2007-09-28 | [
[
"Aldrovandi",
"R.",
""
],
[
"Almeida",
"J. P. Beltran",
""
],
[
"Mayor",
"C. S. O.",
""
],
[
"Pereira",
"J. G.",
""
]
] | The properties of Lorentz transformations in de Sitter relativity are studied. It is shown that, in addition to leaving invariant the velocity of light, they also leave invariant the length-scale related to the curvature of the de Sitter spacetime. The basic conclusion is that it is possible to have an invariant length... |
1507.00158 | Piotr T. Chru\'sciel | Piotr T. Chru\'sciel and Paul Klinger | Vacuum space-times with controlled singularities and without symmetries | 4 pages, minor misprints corrected, added comment that the result
holds in vacuum for all values of the cosmological constant | null | 10.1103/PhysRevD.92.041501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a family of four-dimensional vacuum space-times with
asymptotically velocity dominated singularities and without symmetries.
| [
{
"created": "Wed, 1 Jul 2015 09:27:31 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Aug 2015 15:01:12 GMT",
"version": "v2"
}
] | 2015-09-02 | [
[
"Chruściel",
"Piotr T.",
""
],
[
"Klinger",
"Paul",
""
]
] | We present a family of four-dimensional vacuum space-times with asymptotically velocity dominated singularities and without symmetries. |
gr-qc/9809047 | Hongsu Kim | Hongsu Kim | Spinning BTZ Black Hole versus Kerr Black Hole : A Closer Look | 17 pages, 1 figure, Revtex, Accepted for publication in Phys. Rev. D | Phys.Rev. D59 (1999) 064002 | 10.1103/PhysRevD.59.064002 | null | gr-qc hep-th | null | By applying Newman's algorithm, the AdS_3 rotating black hole solution is
``derived'' from the nonrotating black hole solution of Banados, Teitelboim,
and Zanelli (BTZ). The rotating BTZ solution derived in this fashion is given
in ``Boyer-Lindquist-type'' coordinates whereas the form of the solution
originally given... | [
{
"created": "Wed, 16 Sep 1998 02:54:03 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Nov 1998 05:47:42 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Kim",
"Hongsu",
""
]
] | By applying Newman's algorithm, the AdS_3 rotating black hole solution is ``derived'' from the nonrotating black hole solution of Banados, Teitelboim, and Zanelli (BTZ). The rotating BTZ solution derived in this fashion is given in ``Boyer-Lindquist-type'' coordinates whereas the form of the solution originally given b... |
1502.05166 | Haidar Sheikhahmadi | Haidar Sheikhahmadi, Soheyla Ghorbani and Khaled Saaidi | Non-local scalar fields inflationary mechanism in light of Planck $2013$ | 15 pages, 5 tables | Astrophysics and Space Science (2015) 357:115 | 10.1007/s10509-015-2343-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A generalization of the canonical and non-canonical theory of inflation is
introduced in which the kinetic energy term in action is written as non-local
term. The inflationary universe within the framework of considering this
non-locality will be studied. To investigate the effects of non-locality on the
inflationary... | [
{
"created": "Wed, 18 Feb 2015 09:40:37 GMT",
"version": "v1"
}
] | 2015-07-01 | [
[
"Sheikhahmadi",
"Haidar",
""
],
[
"Ghorbani",
"Soheyla",
""
],
[
"Saaidi",
"Khaled",
""
]
] | A generalization of the canonical and non-canonical theory of inflation is introduced in which the kinetic energy term in action is written as non-local term. The inflationary universe within the framework of considering this non-locality will be studied. To investigate the effects of non-locality on the inflationary p... |
1108.0288 | Mandar Patil | Mandar Patil, Pankaj S. Joshi, Masashi Kimura, Ken-ichi Nakao | Acceleration of particles and shells by Reissner-Nordstr\"{o}m naked
singularities | 13 pages, 7 figures. Significant improvement over older version.
Accepted for publication in Physical Review D | Phys. Rev. D 86, 084023 (2012) | 10.1103/PhysRevD.86.084023 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the Reissner-Nordstr\"{o}m naked singularities with a charge $Q$
larger than its mass $M$ from the perspective of the particle acceleration. We
first consider a collision between two test particles following the radial
geodesics in the Reissner-Nordstr\"{o}m naked singular geometry. An initially
radially i... | [
{
"created": "Mon, 1 Aug 2011 11:47:54 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Sep 2012 04:06:59 GMT",
"version": "v2"
}
] | 2012-10-17 | [
[
"Patil",
"Mandar",
""
],
[
"Joshi",
"Pankaj S.",
""
],
[
"Kimura",
"Masashi",
""
],
[
"Nakao",
"Ken-ichi",
""
]
] | We explore the Reissner-Nordstr\"{o}m naked singularities with a charge $Q$ larger than its mass $M$ from the perspective of the particle acceleration. We first consider a collision between two test particles following the radial geodesics in the Reissner-Nordstr\"{o}m naked singular geometry. An initially radially ing... |
2210.01754 | Francesco Salemi | Marek J. Szczepa\'nczyk, Francesco Salemi, Sophie Bini, Tanmaya
Mishra, Gabriele Vedovato, V. Gayathri, Imre Bartos, Shubhagata Bhaumik,
Marco Drago, Odysse Halim, Claudia Lazzaro, Andrea Miani, Edoardo Milotti,
Giovanni A. Prodi, Shubhanshu Tiwari and Sergey Klimenko | Search for gravitational-wave bursts in the third Advanced LIGO-Virgo
run with coherent WaveBurst enhanced by Machine Learning | 15 pages, 7 figures | null | 10.1103/PhysRevD.107.062002 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This paper presents a search for generic short-duration gravitational-wave
(GW) transients (or GW bursts) in the data from the third observing run of
Advanced LIGO and Advanced Virgo. We use coherent WaveBurst (cWB) pipeline
enhanced with a decision-tree classification algorithm for more efficient
separation of GW si... | [
{
"created": "Tue, 4 Oct 2022 17:19:19 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Nov 2022 20:34:51 GMT",
"version": "v2"
}
] | 2023-03-15 | [
[
"Szczepańczyk",
"Marek J.",
""
],
[
"Salemi",
"Francesco",
""
],
[
"Bini",
"Sophie",
""
],
[
"Mishra",
"Tanmaya",
""
],
[
"Vedovato",
"Gabriele",
""
],
[
"Gayathri",
"V.",
""
],
[
"Bartos",
"Imre",
""
],
... | This paper presents a search for generic short-duration gravitational-wave (GW) transients (or GW bursts) in the data from the third observing run of Advanced LIGO and Advanced Virgo. We use coherent WaveBurst (cWB) pipeline enhanced with a decision-tree classification algorithm for more efficient separation of GW sign... |
1607.01255 | Elias Okon | Elias Okon and Daniel Sudarsky | Black Holes, Information Loss and the Measurement Problem | 14 pages, 3 figures | null | 10.1007/s10701-016-0048-1 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The information loss paradox is often presented as an unavoidable consequence
of well-established physics. However, in order for a genuine paradox to ensue,
not-trivial assumptions about, e.g., quantum effects on spacetime, are
necessary. In this work we will be explicit about these additional, speculative
assumption... | [
{
"created": "Tue, 5 Jul 2016 14:07:34 GMT",
"version": "v1"
}
] | 2017-03-08 | [
[
"Okon",
"Elias",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | The information loss paradox is often presented as an unavoidable consequence of well-established physics. However, in order for a genuine paradox to ensue, not-trivial assumptions about, e.g., quantum effects on spacetime, are necessary. In this work we will be explicit about these additional, speculative assumptions ... |
1801.07159 | Rom\`an R. Zapatrin | Roman Zapatrin | Timelets on causal sets | 12 pages | null | 10.13140/RG.2.2.19132.13448 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | Dual structures on causal sets called timelets are introduced, being discrete
analogs of global time coordinates. Algebraic and geometrical features of the
set of timelets on a causal set are studied. A characterization of timelets in
terms of incidence matrix of causal set is given. The connection between
timelets a... | [
{
"created": "Thu, 18 Jan 2018 13:50:13 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jan 2018 08:33:30 GMT",
"version": "v2"
}
] | 2018-01-26 | [
[
"Zapatrin",
"Roman",
""
]
] | Dual structures on causal sets called timelets are introduced, being discrete analogs of global time coordinates. Algebraic and geometrical features of the set of timelets on a causal set are studied. A characterization of timelets in terms of incidence matrix of causal set is given. The connection between timelets and... |
1908.01691 | Mordehai Milgrom | Mordehai Milgrom | Noncovariance at low accelerations as a route to MOND | 13 pages, version accepted for publication in Phys. Rev. D | Phys. Rev. D 100, 084039 (2019) | 10.1103/PhysRevD.100.084039 | null | gr-qc astro-ph.CO astro-ph.GA hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | MOND has limelighted the fact that Newtonian dynamics (ND) and general
relativity (GR) have not been verified at accelerations below MOND's $a_0$. In
particular, we do not know that all the principles underlying ND or GR apply
below $a_0$. I discuss possible breakdown of general covariance (GC) in this
limit. This re... | [
{
"created": "Mon, 5 Aug 2019 15:26:03 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Oct 2019 08:54:18 GMT",
"version": "v2"
}
] | 2019-10-22 | [
[
"Milgrom",
"Mordehai",
""
]
] | MOND has limelighted the fact that Newtonian dynamics (ND) and general relativity (GR) have not been verified at accelerations below MOND's $a_0$. In particular, we do not know that all the principles underlying ND or GR apply below $a_0$. I discuss possible breakdown of general covariance (GC) in this limit. This reso... |
1604.04905 | Kirill Bronnikov | K.A. Bronnikov, Sung-Won Kim and M.V. Skvortsova | The Birkhoff theorem and string clouds | 9 two-column pages, no figures | Class. Quantum Grav. 33, 195006 (2016) | 10.1088/0264-9381/33/19/195006 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider spherically symmetric space-times in GR under the unconventional
assumptions that the spherical radius $r$ is either a constant or has a null
gradient in the $(t,x)$ subspace orthogonal to the symmetry spheres (i.e.,
$(\partial r)^2 = 0$). It is shown that solutions to the Einstein equations
with $r = \rm... | [
{
"created": "Sun, 17 Apr 2016 18:29:06 GMT",
"version": "v1"
}
] | 2016-10-17 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Kim",
"Sung-Won",
""
],
[
"Skvortsova",
"M. V.",
""
]
] | We consider spherically symmetric space-times in GR under the unconventional assumptions that the spherical radius $r$ is either a constant or has a null gradient in the $(t,x)$ subspace orthogonal to the symmetry spheres (i.e., $(\partial r)^2 = 0$). It is shown that solutions to the Einstein equations with $r = \rm c... |
2112.08951 | Dirk Puetzfeld | Peter A. Hogan, Dirk Puetzfeld | Some Gravity Waves in Isotropic Cosmologies | 12 pages | Phys. Rev. D 105, 044054 (2022) | 10.1103/PhysRevD.105.044054 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct metric perturbations of two families of isotropic expanding
universes describing gravitational waves propagating through these universes.
The waves are non--planar and owe their wave front expansion solely to the
expansion of the universes. The presence of this radiation leads to a small
perturbation of ... | [
{
"created": "Thu, 16 Dec 2021 15:13:26 GMT",
"version": "v1"
},
{
"created": "Sun, 27 Feb 2022 09:40:20 GMT",
"version": "v2"
}
] | 2022-03-01 | [
[
"Hogan",
"Peter A.",
""
],
[
"Puetzfeld",
"Dirk",
""
]
] | We construct metric perturbations of two families of isotropic expanding universes describing gravitational waves propagating through these universes. The waves are non--planar and owe their wave front expansion solely to the expansion of the universes. The presence of this radiation leads to a small perturbation of th... |
1108.2433 | Sujitkumar Chatterjee | D. Panigrahi and S. Chatterjee | Spherically symmetric inhomogeneous model with Chaplygin gas | null | JCAP 2011 | 10.1088/1475-7516/2011/10/002 | JCAP 1110 (2011) 002 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the late time acceleration with a Chaplygin type of gas in
spherically symmetric inhomogeneous model. At the early phase we get
Einstien-deSitter type of solution generalised to inhomogeneous spacetime. But
at late stage of the evolution our solutions admit the accelerating nature of
the universe. For ... | [
{
"created": "Thu, 11 Aug 2011 15:40:09 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Sep 2011 15:20:47 GMT",
"version": "v2"
}
] | 2017-02-17 | [
[
"Panigrahi",
"D.",
""
],
[
"Chatterjee",
"S.",
""
]
] | We investigate the late time acceleration with a Chaplygin type of gas in spherically symmetric inhomogeneous model. At the early phase we get Einstien-deSitter type of solution generalised to inhomogeneous spacetime. But at late stage of the evolution our solutions admit the accelerating nature of the universe. For a ... |
1704.08036 | Marina-Aura Dariescu | Marina-Aura Dariescu, Denisa Andreea Mihu, Ciprian Dariescu | Spatially-Flat Robertson-Walker models with combined CDM and stiff
matter sources and the corresponding thermodynamics | 13 pages, 1 figure | Romanian Journal of Physics 62, 101 (2017) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper, we are considering a spatially-flat
Friedmann-Robertson-Walker cosmological model, fueled with stiff matter and
dust, treated as non-interacting ideal fluid sources. By solving the
corresponding Friedmann equation with a non-zero cosmological constant, we are
deriving the scale function and the ... | [
{
"created": "Wed, 26 Apr 2017 09:37:37 GMT",
"version": "v1"
}
] | 2017-04-27 | [
[
"Dariescu",
"Marina-Aura",
""
],
[
"Mihu",
"Denisa Andreea",
""
],
[
"Dariescu",
"Ciprian",
""
]
] | In the present paper, we are considering a spatially-flat Friedmann-Robertson-Walker cosmological model, fueled with stiff matter and dust, treated as non-interacting ideal fluid sources. By solving the corresponding Friedmann equation with a non-zero cosmological constant, we are deriving the scale function and the fu... |
2208.00138 | Yu Han | Yu Han | Quantisation ambiguities and the effective dynamics of scalar-tensor
theories in loop quantum cosmology | 32 pages, 7 figures | Class. Quantum Grav. 39 (2022) 245009 | 10.1088/1361-6382/aca239 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hamiltonian constraint of scalar-tensor theories in the Jordan frame is
quantised using three quantisation prescriptions in loop quantum cosmology,
from which we obtain three different effective Hamiltonian constraints. The
corresponding effective equations of motion derived from these effective
Hamiltonian const... | [
{
"created": "Sat, 30 Jul 2022 04:17:56 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Dec 2022 02:49:34 GMT",
"version": "v2"
}
] | 2022-12-08 | [
[
"Han",
"Yu",
""
]
] | The Hamiltonian constraint of scalar-tensor theories in the Jordan frame is quantised using three quantisation prescriptions in loop quantum cosmology, from which we obtain three different effective Hamiltonian constraints. The corresponding effective equations of motion derived from these effective Hamiltonian constra... |
2305.18871 | Adailton Ara\'ujo Filho | A. A. Ara\'ujo Filho, H. Hassanabadi, N. Heidari, J. Kr\'iz, S. Zare | Gravitational traces of bumblebee gravity in metric-affine formalism | 32 pages, 8 figures and 4 tables | Classical and Quantum Gravity, 41 (2024) 055003 | 10.1088/1361-6382/ad1712 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work explores various manifestations of bumblebee gravity within the
metric-affine formalism. We investigate the impact of the Lorentz violation
parameter, denoted as $X$, on the modification of the Hawking temperature. Our
calculations reveal that as $X$ increases, the values of the Hawking
temperature attenuat... | [
{
"created": "Tue, 30 May 2023 09:05:37 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Dec 2023 20:46:21 GMT",
"version": "v2"
}
] | 2024-02-01 | [
[
"Filho",
"A. A. Araújo",
""
],
[
"Hassanabadi",
"H.",
""
],
[
"Heidari",
"N.",
""
],
[
"Kríz",
"J.",
""
],
[
"Zare",
"S.",
""
]
] | This work explores various manifestations of bumblebee gravity within the metric-affine formalism. We investigate the impact of the Lorentz violation parameter, denoted as $X$, on the modification of the Hawking temperature. Our calculations reveal that as $X$ increases, the values of the Hawking temperature attenuate.... |
gr-qc/0212028 | Stefan Hollands | Stefan Hollands | A General PCT Theorem for the Operator Product Expansion in Curved
Spacetime | 40 pages, latex, no figures | Commun.Math.Phys. 244 (2004) 209-244 | 10.1007/s00220-003-0991-5 | null | gr-qc hep-th | null | We consider the operator product expansion for quantum field theories on
general analytic 4-dimensional curved spacetimes within an axiomatic framework.
We prove under certain general, model-independent assumptions that such an
expansion necessarily has to be invariant under a simultaneous reversal of
parity, time, a... | [
{
"created": "Fri, 6 Dec 2002 00:08:25 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Hollands",
"Stefan",
""
]
] | We consider the operator product expansion for quantum field theories on general analytic 4-dimensional curved spacetimes within an axiomatic framework. We prove under certain general, model-independent assumptions that such an expansion necessarily has to be invariant under a simultaneous reversal of parity, time, and... |
2105.04689 | Henrique Boschi-Filho | J. P. Morais Gra\c{c}a, Eduardo Folco Capossoli, Henrique Boschi-Filho
and Iarley P. Lobo | Joule-Thomson expansion for quantum corrected AdS-Reissner-Nordstrom
black holes in Kiselev spacetime | V2: 18 pages, 7 figures. In this version, we included a discussion of
the First Law and a deduction of equations with a non-zero pressure even at
zero inversion temperature that explain our (unchanged) numerical results.
This version matches the published one in PRD | Physical Review D 107, 024045 (2023) | 10.1103/PhysRevD.107.024045 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work we study the inversion temperature associated with the
Joule-Thomson expansion from the thermodynamics of AdS-Reissner-N\"ordstrom
black holes. We include quantum corrections in a cosmological fluid that can
describe phantom dark matter or quintessence, both in a Kiselev scenario. The
description of such... | [
{
"created": "Mon, 10 May 2021 22:08:36 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Apr 2024 22:48:47 GMT",
"version": "v2"
}
] | 2024-04-25 | [
[
"Graça",
"J. P. Morais",
""
],
[
"Capossoli",
"Eduardo Folco",
""
],
[
"Boschi-Filho",
"Henrique",
""
],
[
"Lobo",
"Iarley P.",
""
]
] | In this work we study the inversion temperature associated with the Joule-Thomson expansion from the thermodynamics of AdS-Reissner-N\"ordstrom black holes. We include quantum corrections in a cosmological fluid that can describe phantom dark matter or quintessence, both in a Kiselev scenario. The description of such p... |
0909.0190 | Pavel Ivanov | Pavel Ivanov | On the dynamics of exotic matter: towards creation of Perpetuum Mobile
of third kind | accepted to Physics Letters B | Phys.Lett.B680:212-216,2009 | 10.1016/j.physletb.2009.08.057 | null | gr-qc astro-ph.CO hep-th physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The one-dimensional dynamics of a classical ideal 'exotic' fluid with
equation of state $p=p(\epsilon) < 0$ violating the weak energy condition is
discussed. Under certain assumptions it is shown that the well-known
Hwa-Bjorken exact solution of one-dimensional relativistic hydrodynamics is
confined within the future... | [
{
"created": "Tue, 1 Sep 2009 14:15:54 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Ivanov",
"Pavel",
""
]
] | The one-dimensional dynamics of a classical ideal 'exotic' fluid with equation of state $p=p(\epsilon) < 0$ violating the weak energy condition is discussed. Under certain assumptions it is shown that the well-known Hwa-Bjorken exact solution of one-dimensional relativistic hydrodynamics is confined within the future/p... |
gr-qc/9801074 | S. Mignemi | S. Mignemi | The dynamical structure of four-dimensional Chamseddine's gauge theory
of gravity | 14 pages, plain TeX, section 5 revised | Phys.Rev. D59 (1999) 064022 | 10.1103/PhysRevD.59.064022 | INFNCA-TH9801 | gr-qc hep-th | null | We perform the Dirac hamiltonian analysis of a four-dimensional gauge theory
of gravity with an action of topological type, which generalizes some
well-known two-dimensional models. We show that, in contrast with the
two-dimensional case, the theory has a non-vanishing number of dynamical
degrees of freedom and that ... | [
{
"created": "Wed, 21 Jan 1998 17:35:43 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Feb 1998 17:48:10 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Mignemi",
"S.",
""
]
] | We perform the Dirac hamiltonian analysis of a four-dimensional gauge theory of gravity with an action of topological type, which generalizes some well-known two-dimensional models. We show that, in contrast with the two-dimensional case, the theory has a non-vanishing number of dynamical degrees of freedom and that it... |
1312.5375 | Sylvain Marsat | Sylvain Marsat, Luc Blanchet, Alejandro Bohe, Guillaume Faye | Gravitational waves from spinning compact object binaries: New
post-Newtonian results | 7 pages; to appear in the proceedings of the conference HTGRG (Quy
Nhon, Vietnam, 2013) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report on recent results obtained in the post-Newtonian framework for the
modelling of the gravitational waves emitted by binary systems of spinning
compact objects (black holes and/or neutron stars). These new results are
obtained at the spin-orbit (linear-in-spin) level and solving Einstein's field
equations ite... | [
{
"created": "Thu, 19 Dec 2013 00:08:31 GMT",
"version": "v1"
}
] | 2013-12-20 | [
[
"Marsat",
"Sylvain",
""
],
[
"Blanchet",
"Luc",
""
],
[
"Bohe",
"Alejandro",
""
],
[
"Faye",
"Guillaume",
""
]
] | We report on recent results obtained in the post-Newtonian framework for the modelling of the gravitational waves emitted by binary systems of spinning compact objects (black holes and/or neutron stars). These new results are obtained at the spin-orbit (linear-in-spin) level and solving Einstein's field equations itera... |
2003.03720 | Francisco Tello Ortiz | S. K. Maurya, Abdelghani Errehymy, Ksh. Newton Singh, Francisco
Tello-Ortiz, Mohammed Daoud | A gravitational decoupling MGD model in modified $f(R,T)$ gravity theory | 3 tables, 12 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present paper is devoted to investigating the possibility of getting
stellar interiors for ultra-dense compact spherical systems portraying an
anisotropic matter distribution employing the gravitational decoupling by means
of Minimal Geometric Deformation (MGD) procedure within the modified theory of
f(R,T) gravi... | [
{
"created": "Sun, 8 Mar 2020 05:07:52 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Mar 2020 20:05:15 GMT",
"version": "v2"
}
] | 2020-03-12 | [
[
"Maurya",
"S. K.",
""
],
[
"Errehymy",
"Abdelghani",
""
],
[
"Singh",
"Ksh. Newton",
""
],
[
"Tello-Ortiz",
"Francisco",
""
],
[
"Daoud",
"Mohammed",
""
]
] | The present paper is devoted to investigating the possibility of getting stellar interiors for ultra-dense compact spherical systems portraying an anisotropic matter distribution employing the gravitational decoupling by means of Minimal Geometric Deformation (MGD) procedure within the modified theory of f(R,T) gravity... |
1108.3855 | J. Robel Arenas | J. Robel Arenas, J. Manuel Tejeiro | Entanglement Entropy of Black Shells | 30 pages, no figures | Nuovo Cim.B125:1223-1248,2010 | 10.1393/ncb/i2010-10922-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a coherent account of how the entanglement interpretation,
thermofield dynamical description and the brick wall formulations (with the
ground state correctly identified) fit into a connected and self-consistent
explanation of what Bekenstein-Hawking entropy is, and where it is located.
| [
{
"created": "Thu, 18 Aug 2011 21:01:53 GMT",
"version": "v1"
}
] | 2011-09-21 | [
[
"Arenas",
"J. Robel",
""
],
[
"Tejeiro",
"J. Manuel",
""
]
] | We present a coherent account of how the entanglement interpretation, thermofield dynamical description and the brick wall formulations (with the ground state correctly identified) fit into a connected and self-consistent explanation of what Bekenstein-Hawking entropy is, and where it is located. |
0806.2505 | Supratik Pal Dr | Supratik Pal | Brane cosmology, Weyl fluid, and density perturbations | 18 pages, 1 figure, accepted for publication in Phys.Rev.D | Phys.Rev.D78:043517,2008 | 10.1103/PhysRevD.78.043517 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a technique to study relativistic perturbations in the generalised
brane cosmological scenario, which is a generalisation of the multi-fluid
cosmological perturbations to brane cosmology. The novelty of the technique
lies in the inclusion of a radiative bulk which is responsible for bulk-brane
energy excha... | [
{
"created": "Mon, 16 Jun 2008 07:43:16 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Jun 2008 06:20:23 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Pal",
"Supratik",
""
]
] | We develop a technique to study relativistic perturbations in the generalised brane cosmological scenario, which is a generalisation of the multi-fluid cosmological perturbations to brane cosmology. The novelty of the technique lies in the inclusion of a radiative bulk which is responsible for bulk-brane energy exchang... |
1408.2442 | Florent Michel | Xavier Busch, Florent Michel, Renaud Parentani | Suppression of infrared instability in trans-sonic flows by condensation
of zero-frequency short wave length phonons | Final version oublished in PRD (15 pages, 9 figures) | Phys. Rev. D 90, 105005 (2014) | 10.1103/PhysRevD.90.105005 | LPT-Orsay-15-02 | gr-qc cond-mat.quant-gas physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the peculiar infrared instability that characterizes stationary
inhomogeneous flows when their velocity crosses the sound speed by decreasing
values. For definiteness, we work in the context of one dimensional atomic Bose
condensates. These flows are unstable under ultra low real frequency
perturbations be... | [
{
"created": "Mon, 11 Aug 2014 15:30:03 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Nov 2014 10:41:55 GMT",
"version": "v2"
},
{
"created": "Fri, 6 Feb 2015 08:14:55 GMT",
"version": "v3"
}
] | 2015-02-09 | [
[
"Busch",
"Xavier",
""
],
[
"Michel",
"Florent",
""
],
[
"Parentani",
"Renaud",
""
]
] | We analyze the peculiar infrared instability that characterizes stationary inhomogeneous flows when their velocity crosses the sound speed by decreasing values. For definiteness, we work in the context of one dimensional atomic Bose condensates. These flows are unstable under ultra low real frequency perturbations beca... |
1606.06098 | Jishnu Suresh | Jishnu Suresh and V. C. Kuriakose | Geometrothermodynamics of BTZ black hole in new massive gravity | 13 pages, 3 figures. arXiv admin note: text overlap with
arXiv:1603.00981, arXiv:1605.00142 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the thermodynamics as well as thermodynamic geometry of
chargeless BTZ black hole solution in new massive gravity. Phase structure and
thermodynamic stability of the system is analyzed using the
Geometrothermodynamic approach. The phase transition between BTZ black hole
space time and thermal AdS$_{3}$... | [
{
"created": "Mon, 20 Jun 2016 12:58:30 GMT",
"version": "v1"
}
] | 2016-06-21 | [
[
"Suresh",
"Jishnu",
""
],
[
"Kuriakose",
"V. C.",
""
]
] | We investigate the thermodynamics as well as thermodynamic geometry of chargeless BTZ black hole solution in new massive gravity. Phase structure and thermodynamic stability of the system is analyzed using the Geometrothermodynamic approach. The phase transition between BTZ black hole space time and thermal AdS$_{3}$ s... |
1609.08166 | Peter Taylor | Peter Taylor and Cormac Breen | A Mode-Sum Prescription for Vacuum Polarization in Odd Dimensions | New references added. Minor edits | Phys. Rev. D 94, 125024 (2016) | 10.1103/PhysRevD.94.125024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new mode-sum regularization prescription for computing the
vacuum polarization of a scalar field in static spherically-symmetric black
hole spacetimes in odd dimensions. This is the first general and systematic
approach to regularized vacuum polarization in higher dimensions. Remarkably,
the regularizati... | [
{
"created": "Mon, 26 Sep 2016 20:00:06 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Oct 2016 12:16:43 GMT",
"version": "v2"
}
] | 2017-01-04 | [
[
"Taylor",
"Peter",
""
],
[
"Breen",
"Cormac",
""
]
] | We present a new mode-sum regularization prescription for computing the vacuum polarization of a scalar field in static spherically-symmetric black hole spacetimes in odd dimensions. This is the first general and systematic approach to regularized vacuum polarization in higher dimensions. Remarkably, the regularization... |
2005.12284 | Vitor Cardoso | Vitor Cardoso, Arianna Foschi, Miguel Zilhao | Collective scalarization or tachyonization: when averaging fails | 6 pages, version to appear in Physical Review Letters | null | 10.1103/PhysRevLett.124.221104 | null | gr-qc cond-mat.other hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Certain scalar-tensor theories of gravity provide negative-energy, tachyonic
modes to a fundamental scalar inside matter, giving rise to non-perturbative
phenomena around compact stars. Studies of this and other tachyonic
instabilities always average over local matter properties. We use elementary,
flat space models ... | [
{
"created": "Mon, 25 May 2020 18:00:02 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jun 2020 15:20:16 GMT",
"version": "v2"
}
] | 2020-06-17 | [
[
"Cardoso",
"Vitor",
""
],
[
"Foschi",
"Arianna",
""
],
[
"Zilhao",
"Miguel",
""
]
] | Certain scalar-tensor theories of gravity provide negative-energy, tachyonic modes to a fundamental scalar inside matter, giving rise to non-perturbative phenomena around compact stars. Studies of this and other tachyonic instabilities always average over local matter properties. We use elementary, flat space models to... |
1711.02933 | Saskia Grunau | Saskia Grunau, Hendrik Neumann, Stephan Reimers | Geodesic motion in the five-dimensional Myers-Perry-AdS spacetime | References added, minor corrections | Phys. Rev. D 97, 044011 (2018) | 10.1103/PhysRevD.97.044011 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we study the geodesic motion of test particles and light in
the five-dimensional Myers-Perry-anti de Sitter spacetime. We derive the
equations of motion and present their solutions in terms of the Weierstra{\ss}
$\wp$-, $\sigma$- and $\zeta$-functions. With the help of parametric diagrams
and effectiv... | [
{
"created": "Wed, 8 Nov 2017 13:14:42 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Feb 2018 16:31:38 GMT",
"version": "v2"
}
] | 2018-02-12 | [
[
"Grunau",
"Saskia",
""
],
[
"Neumann",
"Hendrik",
""
],
[
"Reimers",
"Stephan",
""
]
] | In this article we study the geodesic motion of test particles and light in the five-dimensional Myers-Perry-anti de Sitter spacetime. We derive the equations of motion and present their solutions in terms of the Weierstra{\ss} $\wp$-, $\sigma$- and $\zeta$-functions. With the help of parametric diagrams and effective ... |
1801.08542 | Antoine Klein | Antoine Klein, Yannick Boetzel, Achamveedu Gopakumar, Philippe Jetzer,
Lorenzo de Vittori | Fourier domain gravitational waveforms for precessing eccentric binaries | 23 pages, 13 figures | Phys. Rev. D 98, 104043 (2018) | 10.1103/PhysRevD.98.104043 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We build two families of inspiral waveforms for precessing binaries on
eccentric orbits in the Fourier domain. To achieve this, we use a small
eccentricity expansion of the waveform amplitudes in order to separate the
periastron precession timescale from the orbital timescale, and use a shifted
uniform asymptotics tr... | [
{
"created": "Thu, 25 Jan 2018 19:00:02 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Nov 2018 17:23:56 GMT",
"version": "v2"
}
] | 2018-11-29 | [
[
"Klein",
"Antoine",
""
],
[
"Boetzel",
"Yannick",
""
],
[
"Gopakumar",
"Achamveedu",
""
],
[
"Jetzer",
"Philippe",
""
],
[
"de Vittori",
"Lorenzo",
""
]
] | We build two families of inspiral waveforms for precessing binaries on eccentric orbits in the Fourier domain. To achieve this, we use a small eccentricity expansion of the waveform amplitudes in order to separate the periastron precession timescale from the orbital timescale, and use a shifted uniform asymptotics tran... |
2104.11362 | Takeshi Chiba | Takeshi Chiba | Spontaneous Scalarization in Scalar-Tensor Theories with Conformal
Symmetry as an Attractor | 15 pages, 7 figures, updated to match the published version | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by constant-G theory, we introduce a one-parameter family of
scalar-tensor theories as an extension of constant-G theory in which the
conformal symmetry is a cosmological attractor. Since the model has the
coupling function of negative curvature, we expect spontaneous scalarization
occurs and the parameter ... | [
{
"created": "Fri, 23 Apr 2021 00:52:59 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Apr 2021 12:47:11 GMT",
"version": "v2"
},
{
"created": "Tue, 12 Oct 2021 01:04:53 GMT",
"version": "v3"
},
{
"created": "Thu, 20 Jan 2022 02:43:53 GMT",
"version": "v4"
}
] | 2022-01-21 | [
[
"Chiba",
"Takeshi",
""
]
] | Motivated by constant-G theory, we introduce a one-parameter family of scalar-tensor theories as an extension of constant-G theory in which the conformal symmetry is a cosmological attractor. Since the model has the coupling function of negative curvature, we expect spontaneous scalarization occurs and the parameter is... |
1603.09353 | Oleg Zaslavskii | O. B. Zaslavskii | Schwarzschild black hole as particle accelerator of spinning particles | 8 pages. Typose corrected. Final version | Europhys. Lett. 114 (2016) 30003 | 10.1209/0295-5075/114/30003 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that in the Schwarzschild background there exists direct
counterpart of the Ba\~{n}ados-Silk-West effect for spinning particles. This
means that if two particles collide near the black hole horizon, their energy
in the centre of mass frame can grow unbounded. In doing so, the crucial role
is played by so-... | [
{
"created": "Wed, 30 Mar 2016 20:01:05 GMT",
"version": "v1"
},
{
"created": "Fri, 13 May 2016 09:43:40 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Jun 2016 20:53:25 GMT",
"version": "v3"
}
] | 2016-06-22 | [
[
"Zaslavskii",
"O. B.",
""
]
] | It is shown that in the Schwarzschild background there exists direct counterpart of the Ba\~{n}ados-Silk-West effect for spinning particles. This means that if two particles collide near the black hole horizon, their energy in the centre of mass frame can grow unbounded. In doing so, the crucial role is played by so-ca... |
gr-qc/0612005 | Daniel Sudarsky | Daniel Sudarsky | The Seeds of Cosmic structure as a door to New Physics | Prepared for the proceedings of the conference NEBXII " Recent
Developments in Gravity", Napfio Grece June 2006. LateX, 15 pages | J.Phys.Conf.Ser.68:012029,2007 | 10.1088/1742-6596/68/1/012029 | null | gr-qc | null | There is something missing in our understanding of the origin of the seeds of
Cosmic Structuture.
The fact that the fluctuation spectrum can be extracted from the inflationary
scenario through an analysis that involves quantum field theory in curved
space-time, and that it coincides with the observational data has ... | [
{
"created": "Fri, 1 Dec 2006 01:49:25 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Sudarsky",
"Daniel",
""
]
] | There is something missing in our understanding of the origin of the seeds of Cosmic Structuture. The fact that the fluctuation spectrum can be extracted from the inflationary scenario through an analysis that involves quantum field theory in curved space-time, and that it coincides with the observational data has lead... |
1810.06293 | Chan Park | Chan Park | A Covariant Approach to 1+3 Formalism | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I present a covariant approach to developing 1+3 formalism without an
introduction of any basis or coordinates. In the formalism, a spacetime which
has a timelike congruence is assumed. Then, tensors are split into temporal and
spatial parts according to the tangent direction to the congruence. I make use
of the natu... | [
{
"created": "Mon, 15 Oct 2018 12:06:16 GMT",
"version": "v1"
}
] | 2018-10-16 | [
[
"Park",
"Chan",
""
]
] | I present a covariant approach to developing 1+3 formalism without an introduction of any basis or coordinates. In the formalism, a spacetime which has a timelike congruence is assumed. Then, tensors are split into temporal and spatial parts according to the tangent direction to the congruence. I make use of the natura... |
2007.10566 | Guansheng He | Guansheng He and Wenbin Lin | Second Order Kerr-Newman Time Delay | null | Phys. Rev. D. 93, 023005 (2016) | 10.1103/PhysRevD.93.023005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The explicit form for the post-Newtonian gravitational time delay of light
signals propagating on the equatorial plane of a Kerr-Newman black hole is
derived. Based on the null geodesic in Kerr-Newman spacetime, we adopt the
iterative method to calculate the time delay. Our result reduces to the
previous formulation ... | [
{
"created": "Tue, 21 Jul 2020 02:21:08 GMT",
"version": "v1"
}
] | 2020-07-22 | [
[
"He",
"Guansheng",
""
],
[
"Lin",
"Wenbin",
""
]
] | The explicit form for the post-Newtonian gravitational time delay of light signals propagating on the equatorial plane of a Kerr-Newman black hole is derived. Based on the null geodesic in Kerr-Newman spacetime, we adopt the iterative method to calculate the time delay. Our result reduces to the previous formulation fo... |
0808.1267 | Gustavo Gazzola de Lima | G. Gazzola, M. C. Nemes, W. F. Wreszinski | On the Casimir energy for a massive quantum scalar field and the
Cosmological constant | 15 pages, 2 figures, conceptually improved version, to appear in Ann.
Phys | null | 10.1016/j.aop.2009.07.001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a rigorous, regularization independent local quantum field
theoretic treatment of the Casimir effect for a quantum scalar field of mass
$\mu\ne0$ which yields closed form expressions for the energy density and
pressure. As an application we show that there exist special states of the
quantum field at fixed... | [
{
"created": "Fri, 8 Aug 2008 18:48:32 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Feb 2009 13:09:12 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Jul 2009 13:15:15 GMT",
"version": "v3"
}
] | 2015-05-13 | [
[
"Gazzola",
"G.",
""
],
[
"Nemes",
"M. C.",
""
],
[
"Wreszinski",
"W. F.",
""
]
] | We present a rigorous, regularization independent local quantum field theoretic treatment of the Casimir effect for a quantum scalar field of mass $\mu\ne0$ which yields closed form expressions for the energy density and pressure. As an application we show that there exist special states of the quantum field at fixed c... |
1107.3570 | Daniel M\"uller | Daniel M\"uller | Homogeneous Solutions of Quadratic Gravity | talk presented in the 8th Friedmann Seminar, 30 May - 03 June 2011,
Rio de Janeiro, Brazil | IJMPCS, Vol. 3, 111, (2011) | 10.1142/S2010194511001206 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is believed that soon after the Planck time, Einstein's general relativity
theory should be corrected to an effective quadratic theory. In this work we
present the 3+1 decomposition for the zero vorticity case for arbitrary
spatially homogenous spaces. We specialize for the particular Bianchi $I$
diagonal case. Th... | [
{
"created": "Mon, 18 Jul 2011 20:22:52 GMT",
"version": "v1"
}
] | 2012-02-29 | [
[
"Müller",
"Daniel",
""
]
] | It is believed that soon after the Planck time, Einstein's general relativity theory should be corrected to an effective quadratic theory. In this work we present the 3+1 decomposition for the zero vorticity case for arbitrary spatially homogenous spaces. We specialize for the particular Bianchi $I$ diagonal case. The ... |
0805.3099 | Pedro Montero | Pedro J. Montero, Jose A. Font, Masaru Shibata | NADA: A new code for studying self-gravitating tori around black holes | 18 pages, 14 figures, accepted for publication in Phys. Rev. D | Phys.Rev.D78:064037,2008 | 10.1103/PhysRevD.78.064037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new two-dimensional numerical code called Nada designed to solve
the full Einstein equations coupled to the general relativistic hydrodynamics
equations. The code is mainly intended for studies of self-gravitating
accretion disks (or tori) around black holes, although it is also suitable for
regular spac... | [
{
"created": "Tue, 20 May 2008 15:09:30 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Aug 2008 22:14:26 GMT",
"version": "v2"
}
] | 2009-02-23 | [
[
"Montero",
"Pedro J.",
""
],
[
"Font",
"Jose A.",
""
],
[
"Shibata",
"Masaru",
""
]
] | We present a new two-dimensional numerical code called Nada designed to solve the full Einstein equations coupled to the general relativistic hydrodynamics equations. The code is mainly intended for studies of self-gravitating accretion disks (or tori) around black holes, although it is also suitable for regular spacet... |
1407.2231 | \"Ozg\"ur Akarsu | Ozgur Akarsu, Tekin Dereli, Nihan Katirci, Mikhail B. Sheftel | General solution of a cosmological model induced from higher dimensions
using a kinematical constraint | 19 pages, 19 figures, matches the version published in General
Relativity and Gravitation | Gen. Relativ. Gravit. 47 (2015) 61 | 10.1007/s10714-015-1902-8 | null | gr-qc math-ph math.MP nlin.SI | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent study Akarsu and Dereli (Gen. Relativ. Gravit. 45:1211, 2013)
discussed the dynamical reduction of a higher dimensional cosmological model
which is augmented by a kinematical constraint characterized by a single real
parameter, correlating and controlling the expansion of both the external
(physical) and ... | [
{
"created": "Tue, 8 Jul 2014 19:45:46 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Jan 2015 15:51:12 GMT",
"version": "v2"
},
{
"created": "Mon, 4 May 2015 12:05:39 GMT",
"version": "v3"
}
] | 2015-05-06 | [
[
"Akarsu",
"Ozgur",
""
],
[
"Dereli",
"Tekin",
""
],
[
"Katirci",
"Nihan",
""
],
[
"Sheftel",
"Mikhail B.",
""
]
] | In a recent study Akarsu and Dereli (Gen. Relativ. Gravit. 45:1211, 2013) discussed the dynamical reduction of a higher dimensional cosmological model which is augmented by a kinematical constraint characterized by a single real parameter, correlating and controlling the expansion of both the external (physical) and in... |
1205.4550 | Gabor Etesi | Gabor Etesi | A proof of the Geroch-Horowitz-Penrose formulation of the strong cosmic
censor conjecture motivated by computability theory | 17pp, LaTeX, no figures. Compared with the published version
clarifications has been made in Sect. 2 | Int. Journ. Theor. Phys. 52(3), 946-960 (2013) | 10.1007/s10773-012-1407-0 | null | gr-qc cs.CC | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we present a proof of a mathematical version of the strong
cosmic censor conjecture attributed to Geroch-Horowitz and Penrose but
formulated explicitly by Wald. The proof is based on the existence of
future-inextendible causal curves in causal pasts of events on the future
Cauchy horizon in a non-global... | [
{
"created": "Mon, 21 May 2012 10:18:48 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jun 2012 08:05:23 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Feb 2013 09:02:33 GMT",
"version": "v3"
},
{
"created": "Mon, 13 Dec 2021 10:34:35 GMT",
"version": "v4"
}
] | 2021-12-14 | [
[
"Etesi",
"Gabor",
""
]
] | In this paper we present a proof of a mathematical version of the strong cosmic censor conjecture attributed to Geroch-Horowitz and Penrose but formulated explicitly by Wald. The proof is based on the existence of future-inextendible causal curves in causal pasts of events on the future Cauchy horizon in a non-globally... |
gr-qc/0302111 | Domenico Giulini | Domenico Giulini | Close encounters of black holes | 31 pages, 7 eps-figures | Heino Falcke and Friedrich Hehl (eds.): The Galactic Black Hole;
pp.178-206 (IOP Publishing, Bristol, 2003) | null | THEP-03/03 | gr-qc astro-ph | null | This is an introduction into the problem of how to set up black hole
initial-data for the matter-free field equations of General Relativity. The
approach is semi-pedagogical and addresses a more general audience of
astrophysicists and students with no specialized training in General Relativity
beyond that of an intro... | [
{
"created": "Thu, 27 Feb 2003 16:51:38 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Giulini",
"Domenico",
""
]
] | This is an introduction into the problem of how to set up black hole initial-data for the matter-free field equations of General Relativity. The approach is semi-pedagogical and addresses a more general audience of astrophysicists and students with no specialized training in General Relativity beyond that of an introdu... |
2011.06799 | Yasufumi Kojima | Yasufumi Kojima and Yuto Kimura | Particle acceleration driven by null electromagnetic fields near a Kerr
black hole | 11 pages, 4 figures | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Short timescale variability is often associated with a black hole system. The
consequence of an electromagnetic outflow suddenly generated near a Kerr black
hole is considered assuming that it is described by a solution of a force-free
field with a null electric current. We compute charged particle acceleration
induc... | [
{
"created": "Fri, 13 Nov 2020 07:52:42 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Dec 2020 04:19:13 GMT",
"version": "v2"
}
] | 2020-12-25 | [
[
"Kojima",
"Yasufumi",
""
],
[
"Kimura",
"Yuto",
""
]
] | Short timescale variability is often associated with a black hole system. The consequence of an electromagnetic outflow suddenly generated near a Kerr black hole is considered assuming that it is described by a solution of a force-free field with a null electric current. We compute charged particle acceleration induced... |
1412.6312 | Alex Miranda | Alex S. Miranda, Jaqueline Morgan, Vilson T. Zanchin, Alejandra Kandus | Separable wave equations for gravitoelectromagnetic perturbations of
rotating charged black strings | 37 pages; changes in the abstract, introduction and concluding
section; version to appear in Class. Quantum Grav | null | 10.1088/0264-9381/32/23/235002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Rotating charged black strings are solutions of four-dimensional
Einstein-Maxwell equations with a negative cosmological constant and a
non-trivial topology. According to the AdS/CFT correspondence, these black
strings are dual to rotating thermal states of a strongly interacting field
theory with nonzero chemical po... | [
{
"created": "Fri, 19 Dec 2014 12:21:21 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Sep 2015 18:51:36 GMT",
"version": "v2"
}
] | 2015-11-18 | [
[
"Miranda",
"Alex S.",
""
],
[
"Morgan",
"Jaqueline",
""
],
[
"Zanchin",
"Vilson T.",
""
],
[
"Kandus",
"Alejandra",
""
]
] | Rotating charged black strings are solutions of four-dimensional Einstein-Maxwell equations with a negative cosmological constant and a non-trivial topology. According to the AdS/CFT correspondence, these black strings are dual to rotating thermal states of a strongly interacting field theory with nonzero chemical pote... |
1101.3179 | Jose Luis Bl\'azquez-Salcedo | L. M. Gonz\'alez-Romero and J. L. Bl\'azquez-Salcedo | New model of relativistic slowly rotating neutron stars with surface
layer \textit{crust}: application to giant \textit{glitches} of Vela Pulsar | 4 pages, 2 figures, to appear in Proceedings of Spanish Relativity
Meeting 2010 (ERE 2010) held in Granada, Spain | J.Phys.Conf.Ser.314:012088,2011 | 10.1088/1742-6596/314/1/012088 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Introducing a surface layer of matter on the edge of a neutron star in slow
rigid rotation, we analyze, from an intrinsic point of view, the junction
conditions that must be satisfied between the interior and exterior solutions
of the Einstein equations. In our model the core-\textit{crust} transition
pressure arise ... | [
{
"created": "Mon, 17 Jan 2011 10:53:05 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"González-Romero",
"L. M.",
""
],
[
"Blázquez-Salcedo",
"J. L.",
""
]
] | Introducing a surface layer of matter on the edge of a neutron star in slow rigid rotation, we analyze, from an intrinsic point of view, the junction conditions that must be satisfied between the interior and exterior solutions of the Einstein equations. In our model the core-\textit{crust} transition pressure arise as... |
gr-qc/0107028 | Abel Camacho Quintana | A. Camacho (Dept. of Physics, Instituto Nacional de Investigaciones
Nucleares) | Decoherence-induced violations of Einstein equivalence principle | This essay received an ``honorable mention'' in the 2001 Essay
Competition of the Gravity Research Foundation. Accepted in International
Journal of Modern Physics D | Int.J.Mod.Phys. D10 (2001) 767-774 | 10.1142/S0218271801001542 | null | gr-qc quant-ph | null | In this essay it will be shown that Decoherence Model and Einstein
Equivalence Principle are conceptually incompatible. In other words, assuming
only the validity of the Weak Equivalence Principle the present work concludes
that we face two possibilities: (i) if Decoherence Model provides a correct
description of nat... | [
{
"created": "Mon, 9 Jul 2001 17:27:30 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Camacho",
"A.",
"",
"Dept. of Physics, Instituto Nacional de Investigaciones\n Nucleares"
]
] | In this essay it will be shown that Decoherence Model and Einstein Equivalence Principle are conceptually incompatible. In other words, assuming only the validity of the Weak Equivalence Principle the present work concludes that we face two possibilities: (i) if Decoherence Model provides a correct description of natur... |
1003.2348 | David P. Rideout | Johannes Brunnemann and David Rideout | Oriented Matroids -- Combinatorial Structures Underlying Loop Quantum
Gravity | 43 pages, 26 figures, LaTeX. Version published in CQG. Typos
corrected, presentation slightly extended | Class.Quant.Grav.27:205008,2010 | 10.1088/0264-9381/27/20/205008 | pi-qf-177 | gr-qc math-ph math.CO math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze combinatorial structures which play a central role in determining
spectral properties of the volume operator in loop quantum gravity (LQG). These
structures encode geometrical information of the embedding of arbitrary valence
vertices of a graph in 3-dimensional Riemannian space, and can be represented
by ... | [
{
"created": "Thu, 11 Mar 2010 15:40:33 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Nov 2010 17:56:29 GMT",
"version": "v2"
}
] | 2010-11-22 | [
[
"Brunnemann",
"Johannes",
""
],
[
"Rideout",
"David",
""
]
] | We analyze combinatorial structures which play a central role in determining spectral properties of the volume operator in loop quantum gravity (LQG). These structures encode geometrical information of the embedding of arbitrary valence vertices of a graph in 3-dimensional Riemannian space, and can be represented by si... |
1408.5344 | Emil Nissimov | Eduardo Guendelman, Ram\'on Herrera, Pedro Labra\~na, Emil Nissimov,
Svetlana Pacheva | Emergent Cosmology, Inflation and Dark Energy | v.1 14 pages, 2 figures; v.2 references and acknowledgements added;
v.3 very significant upgrade - 24 pages, change of list of authors, two new
sections, extended abstract, introduction and conclusions, additional
citations and acknowledgements; v.4 title shortened, further improvements,
version to appear in "G... | General Relativity and Gravitation 47 (2015) art.10 | 10.1007/s10714-015-1852-1 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new class of gravity-matter models defined in terms of two independent
non-Riemannian volume forms (alternative generally covariant integration
measure densities) on the space-time manifold are studied in some detail. These
models involve an additional $R^2$ (square of the scalar curvature) term as
well as scalar m... | [
{
"created": "Fri, 22 Aug 2014 16:12:20 GMT",
"version": "v1"
},
{
"created": "Sun, 31 Aug 2014 13:28:08 GMT",
"version": "v2"
},
{
"created": "Wed, 12 Nov 2014 20:55:41 GMT",
"version": "v3"
},
{
"created": "Thu, 8 Jan 2015 12:13:47 GMT",
"version": "v4"
}
] | 2015-06-22 | [
[
"Guendelman",
"Eduardo",
""
],
[
"Herrera",
"Ramón",
""
],
[
"Labraña",
"Pedro",
""
],
[
"Nissimov",
"Emil",
""
],
[
"Pacheva",
"Svetlana",
""
]
] | A new class of gravity-matter models defined in terms of two independent non-Riemannian volume forms (alternative generally covariant integration measure densities) on the space-time manifold are studied in some detail. These models involve an additional $R^2$ (square of the scalar curvature) term as well as scalar mat... |
2001.10633 | Adri\`a Delhom | Adria Delhom, Iarley P. Lobo, Gonzalo J. Olmo, Carlos Romero | Conformally invariant proper time with general non-metricity | 12, 2 figures, updated to match published version | null | 10.1140/epjc/s10052-020-7974-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the definition of proper time for Weyl-invariant space-times
given by Perlick naturally extends to spaces with arbitrary non-metricity. We
then discuss the relation between this generalized proper time and the
Ehlers-Pirani-Schild definition of time when there is arbitrary non-metricity.
Then we show how... | [
{
"created": "Tue, 28 Jan 2020 23:14:01 GMT",
"version": "v1"
},
{
"created": "Wed, 13 May 2020 12:43:40 GMT",
"version": "v2"
}
] | 2020-05-14 | [
[
"Delhom",
"Adria",
""
],
[
"Lobo",
"Iarley P.",
""
],
[
"Olmo",
"Gonzalo J.",
""
],
[
"Romero",
"Carlos",
""
]
] | We show that the definition of proper time for Weyl-invariant space-times given by Perlick naturally extends to spaces with arbitrary non-metricity. We then discuss the relation between this generalized proper time and the Ehlers-Pirani-Schild definition of time when there is arbitrary non-metricity. Then we show how t... |
1111.5825 | Jamie Scott | Jay Marx, Karsten Danzmann, James Hough, Kazuaki Kuroda, David
McClelland, Benoit Mours, Sterl Phinney, Sheila Rowan, B. Sathyaprakash,
Flavio Vetrano, Stefano Vitale, Stan Whitcomb, Clifford Will (for the
Gravitational Wave International Committee) | The Gravitational Wave International Committee Roadmap: The future of
gravitational wave astronomy | 116 pages. Original document in higher resolution can be found at
https://gwic.ligo.org/roadmap/ | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave science is on the verge of direct observation of the waves
predicted by Einstein's General Theory of Relativity and opening the exciting
new field of gravitational wave astronomy. In the coming decades,
ultra-sensitive arrays of ground-based instruments and complementary
spaced-based instruments wi... | [
{
"created": "Thu, 24 Nov 2011 17:53:19 GMT",
"version": "v1"
}
] | 2011-11-28 | [
[
"Marx",
"Jay",
"",
"for the\n Gravitational Wave International Committee"
],
[
"Danzmann",
"Karsten",
"",
"for the\n Gravitational Wave International Committee"
],
[
"Hough",
"James",
"",
"for the\n Gravitational Wave International Committee"
],
[
... | Gravitational wave science is on the verge of direct observation of the waves predicted by Einstein's General Theory of Relativity and opening the exciting new field of gravitational wave astronomy. In the coming decades, ultra-sensitive arrays of ground-based instruments and complementary spaced-based instruments will... |
gr-qc/0701024 | Amos Ori | Amos Ori | Formation of closed timelike curves in a composite vacuum/dust
asymptotically-flat spacetime | 15 pages; accepted to Phys. Rev. D (no modifications) | Phys.Rev.D76:044002,2007 | 10.1103/PhysRevD.76.044002 | null | gr-qc | null | We present a new asymptotically-flat time-machine model made solely of vacuum
and dust. The spacetime evolves from a regular spacelike initial hypersurface S
and subsequently develops closed timelike curves. The initial hypersurface S is
asymptotically flat and topologically trivial. The chronology violation occurs
i... | [
{
"created": "Wed, 3 Jan 2007 11:26:24 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Jan 2007 10:58:00 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Jun 2007 11:16:16 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Ori",
"Amos",
""
]
] | We present a new asymptotically-flat time-machine model made solely of vacuum and dust. The spacetime evolves from a regular spacelike initial hypersurface S and subsequently develops closed timelike curves. The initial hypersurface S is asymptotically flat and topologically trivial. The chronology violation occurs in ... |
0710.2512 | Georgii Alekseev | G.A. Alekseev | Monodromy transform approach in the theory of integrable reductions of
Einstein's field equations and some applications | 3 pages, talk given at the Eleventh Marcel Grossmann Meeting (Berlin,
July 23 - 29, 2006), submitted to MG11 Proceedings | null | 10.1142/9789812834300_0378 | null | gr-qc | null | A brief sketch of the formulation of the monodromy transform approach and
corresponding integral equation methods as well as of various applications of
this approach for solution of integrable symmetry reductions of Einstein's
field equations is presented.
| [
{
"created": "Fri, 12 Oct 2007 17:06:07 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Alekseev",
"G. A.",
""
]
] | A brief sketch of the formulation of the monodromy transform approach and corresponding integral equation methods as well as of various applications of this approach for solution of integrable symmetry reductions of Einstein's field equations is presented. |
1010.3865 | Christopher Berry | Christopher P. L. Berry, Jonathan R. Gair | Gravitational wave energy spectrum of a parabolic encounter | 5 pages, 3 figures. Minor changes to match published version; figure
1 corrected; references added | Phys.Rev.D82:107501,2010 | 10.1103/PhysRevD.82.107501 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive an analytic expression for the energy spectrum of gravitational
waves from a parabolic Keplerian binary by taking the limit of the Peters and
Matthews spectrum for eccentric orbits. This demonstrates that the location of
the peak of the energy spectrum depends primarily on the orbital periapse
rather than t... | [
{
"created": "Tue, 19 Oct 2010 11:52:30 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Nov 2010 10:48:46 GMT",
"version": "v2"
}
] | 2011-05-18 | [
[
"Berry",
"Christopher P. L.",
""
],
[
"Gair",
"Jonathan R.",
""
]
] | We derive an analytic expression for the energy spectrum of gravitational waves from a parabolic Keplerian binary by taking the limit of the Peters and Matthews spectrum for eccentric orbits. This demonstrates that the location of the peak of the energy spectrum depends primarily on the orbital periapse rather than the... |
2405.09495 | Marcus Hatton | Marcus J. Hatton, Ian Hawke | A dissipative extension to ideal hydrodynamics | 16 pages, 13 figures. Intention to submit to MNRAS | null | null | null | gr-qc astro-ph.HE physics.comp-ph physics.flu-dyn | http://creativecommons.org/licenses/by/4.0/ | We present a formulation of special relativistic, dissipative hydrodynamics
(SRDHD) derived from the well-established M\"uller- Israel-Stewart (MIS)
formalism using an expansion in deviations from ideal behaviour. By re-summing
the non-ideal terms, our approach extends the Euler equations of motion for an
ideal fluid... | [
{
"created": "Wed, 15 May 2024 16:41:07 GMT",
"version": "v1"
}
] | 2024-05-16 | [
[
"Hatton",
"Marcus J.",
""
],
[
"Hawke",
"Ian",
""
]
] | We present a formulation of special relativistic, dissipative hydrodynamics (SRDHD) derived from the well-established M\"uller- Israel-Stewart (MIS) formalism using an expansion in deviations from ideal behaviour. By re-summing the non-ideal terms, our approach extends the Euler equations of motion for an ideal fluid t... |
1407.6292 | Nijo Varghese Dr. | Nijo Varghese and V. C. Kuriakose | Late-time evolution of Dirac field around Schwarzschild-quintessence
black hole | 10 pages, 5 figures. To appear in MPLA. arXiv admin note: text
overlap with arXiv:1210.0476 | null | 10.1142/S0217732314501132 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The late-time evolution of Dirac field around spherically symmetric black
hole surrounded by quintessece is studied numerically. Our results show, for
lower values of the quintessence state parameter \epsilon, Dirac field decays
as power-law tail but with a slower decay rate than the corresponding
Schwarzschild case.... | [
{
"created": "Wed, 23 Jul 2014 16:57:37 GMT",
"version": "v1"
}
] | 2014-07-24 | [
[
"Varghese",
"Nijo",
""
],
[
"Kuriakose",
"V. C.",
""
]
] | The late-time evolution of Dirac field around spherically symmetric black hole surrounded by quintessece is studied numerically. Our results show, for lower values of the quintessence state parameter \epsilon, Dirac field decays as power-law tail but with a slower decay rate than the corresponding Schwarzschild case. B... |
gr-qc/0006096 | Jerome Martin | Jerome Martin, Nelson Pinto-Neto and Ivano Damiao Soares | Green Functions for Topology Change | 11 pages, 2 figures, reshaped version | JHEP 0503:060,2005 | 10.1088/1126-6708/2005/03/060 | null | gr-qc hep-th | null | We explicitly calculate the Green functions describing quantum changes of
topology in Friedman-Lemaitre-Robertson-Walker Universes whose spacelike
sections are compact but endowed with distinct topologies. The calculations are
performed using the long wavelength approximation at second order in the
gradient expansion... | [
{
"created": "Wed, 28 Jun 2000 09:09:01 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Aug 2003 08:21:15 GMT",
"version": "v2"
}
] | 2010-02-03 | [
[
"Martin",
"Jerome",
""
],
[
"Pinto-Neto",
"Nelson",
""
],
[
"Soares",
"Ivano Damiao",
""
]
] | We explicitly calculate the Green functions describing quantum changes of topology in Friedman-Lemaitre-Robertson-Walker Universes whose spacelike sections are compact but endowed with distinct topologies. The calculations are performed using the long wavelength approximation at second order in the gradient expansion. ... |
gr-qc/9906081 | Ms. Amita Shaw | S.Biswas, A.Shaw and B.Modak | Schwinger's Result On Particle Production From Complex Paths WKB
Approximation | 14 Pages, LaTeX, no figure | Int.J.Mod.Phys. A15 (2000) 3717-3732 | 10.1142/S0217751X00001221 | null | gr-qc | null | This paper presents the derivation of Schwinger's gauge invariant result of
$Im \cal{L}_{eff}$ upto one loop approximation, for particle production in an
uniform electric field through the method of complex trajectory WKB
approximation (CWKB). The CWKB proposed by one of the author's \cite{bis:ijtp}
looks upon partic... | [
{
"created": "Fri, 18 Jun 1999 06:14:50 GMT",
"version": "v1"
}
] | 2016-12-21 | [
[
"Biswas",
"S.",
""
],
[
"Shaw",
"A.",
""
],
[
"Modak",
"B.",
""
]
] | This paper presents the derivation of Schwinger's gauge invariant result of $Im \cal{L}_{eff}$ upto one loop approximation, for particle production in an uniform electric field through the method of complex trajectory WKB approximation (CWKB). The CWKB proposed by one of the author's \cite{bis:ijtp} looks upon particle... |
2210.05378 | Dnyaneshwar Pawar Dr | D. D. Pawar, D. K. Raut, W. D. Patil | FRW model with Two -- fluid Source in fractal cosmology | 25 pages, 16 figures | Pramana J. Phys. (2022) 96, 133 | 10.1007/s12043-022-02364-5 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Present paper deals with flat Friedmann - Robertson - Walker (FRW) model with
two - fluid source in fractal cosmology. In this model one fluid represents
matter content of the universe and another fluid is radiation field modeling
the cosmic microwave background. To get the deterministic model, we have used
the relat... | [
{
"created": "Sun, 9 Oct 2022 05:37:29 GMT",
"version": "v1"
}
] | 2022-10-12 | [
[
"Pawar",
"D. D.",
""
],
[
"Raut",
"D. K.",
""
],
[
"Patil",
"W. D.",
""
]
] | Present paper deals with flat Friedmann - Robertson - Walker (FRW) model with two - fluid source in fractal cosmology. In this model one fluid represents matter content of the universe and another fluid is radiation field modeling the cosmic microwave background. To get the deterministic model, we have used the relatio... |
2201.05736 | Stanley Deser | S.Deser | A short pre-history of Quantum Gravity | null | null | 10.1119/5.0080405 | brx-th-6697; caltech-th-2022-001 | gr-qc physics.hist-ph | http://creativecommons.org/licenses/by/4.0/ | I describe the early, from the nineteen sixties, history of attempts at
quantizing General Relativity.
| [
{
"created": "Sat, 15 Jan 2022 02:17:33 GMT",
"version": "v1"
}
] | 2022-04-06 | [
[
"Deser",
"S.",
""
]
] | I describe the early, from the nineteen sixties, history of attempts at quantizing General Relativity. |
gr-qc/0412065 | Francisco Lobo | Francisco S. N. Lobo and Matt Visser | Linearized warp drive and the energy conditions | 6 pages, contribution to the proceedings of the Spanish Relativity
Meeting-2004 (Miraflores de la Sierra, Madrid, September 2004) | null | null | null | gr-qc | null | ''Warp drive'' spacetimes are useful as ''gedanken-experiments'' and as a
theoretician's probe of the foundations of general relativity. Applying
linearized gravity to the weak-field warp drive, i.e., for non-relativistic
warp-bubble velocities, we find that the occurrence of energy condition
violations in this class... | [
{
"created": "Tue, 14 Dec 2004 18:13:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lobo",
"Francisco S. N.",
""
],
[
"Visser",
"Matt",
""
]
] | ''Warp drive'' spacetimes are useful as ''gedanken-experiments'' and as a theoretician's probe of the foundations of general relativity. Applying linearized gravity to the weak-field warp drive, i.e., for non-relativistic warp-bubble velocities, we find that the occurrence of energy condition violations in this class o... |
1605.06315 | Andre Maeder | Andre Maeder | Scale invariant cosmology I: the vacuum and the cosmological constant | 4 pages, no figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The source of the acceleration of the expansion of the Universe is still
unknown. We examine some consequences of the possible scale invariance of the
empty space at large scales. The central hypothesis of this work is that, at
macroscopic and large scales where General Relativity may be applied, the empty
space in t... | [
{
"created": "Thu, 19 May 2016 06:27:59 GMT",
"version": "v1"
}
] | 2016-05-25 | [
[
"Maeder",
"Andre",
""
]
] | The source of the acceleration of the expansion of the Universe is still unknown. We examine some consequences of the possible scale invariance of the empty space at large scales. The central hypothesis of this work is that, at macroscopic and large scales where General Relativity may be applied, the empty space in the... |
1102.2501 | S Habib Mazharimousavi | S. Habib Mazharimousavi and M. Halilsoy | Specific dynamics for the Domain-Walls in Einstein-Maxwell-Dilaton
theory | 9 pages, 4 figures, final version to appear in Classical and Quantum
Gravity (CQG) | Class. Quantum Grav. 29 (2012) 065013 | 10.1088/0264-9381/29/6/065013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider Einstein-Maxwell-Dilaton (EMD) Lagrangian supplemented by double
Liouville potentials to enrich our system and investigate the resulting
dynamics. The general solution provides us alternative structures induced on
the 3-dimensional domain wall (DW) moving in the 4-dimensional bulk. In
particular, the loca... | [
{
"created": "Sat, 12 Feb 2011 11:53:50 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Feb 2012 15:57:46 GMT",
"version": "v2"
}
] | 2012-03-06 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
]
] | We consider Einstein-Maxwell-Dilaton (EMD) Lagrangian supplemented by double Liouville potentials to enrich our system and investigate the resulting dynamics. The general solution provides us alternative structures induced on the 3-dimensional domain wall (DW) moving in the 4-dimensional bulk. In particular, the local ... |
gr-qc/9703074 | Carey Carpenter Briggs | C. C. Briggs (Penn State U.) | A General Expression for the Quartic Lovelock Tensor | PostScript file, 2 pages | null | null | null | gr-qc | null | A general expression is given for the quartic Lovelock tensor in terms of the
Riemann-Christoffel and Ricci curvature tensors and the Riemann curvature
scalar for n-dimensional differentiable manifolds having a general linear
connection. In addition, expressions are given (in the appendix) for the
coefficient of the ... | [
{
"created": "Thu, 27 Mar 1997 00:18:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Briggs",
"C. C.",
"",
"Penn State U."
]
] | A general expression is given for the quartic Lovelock tensor in terms of the Riemann-Christoffel and Ricci curvature tensors and the Riemann curvature scalar for n-dimensional differentiable manifolds having a general linear connection. In addition, expressions are given (in the appendix) for the coefficient of the qu... |
gr-qc/0602022 | Jack Sarfatti | Jack Sarfatti | Emergent Gravity and Torsion: String Theory Without String Theory, Why
the Cosmic Dark Energy Is So Small | This version is the second major revision addressing several
unresolved fundamental empirical problems | null | null | null | gr-qc | null | A surprisingly simple holographic explanation for the low dark energy density
is suggested. I derive the Einstein-Cartan disclination curvature tetrads and
the physically independent dislocation torsion gap spin connections from an
"M-Matrix" of non-closed Cartan 1-forms made from 8 Goldstone phase 0-forms of
the vac... | [
{
"created": "Tue, 7 Feb 2006 08:39:00 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Mar 2006 21:25:49 GMT",
"version": "v10"
},
{
"created": "Mon, 27 Mar 2006 05:09:30 GMT",
"version": "v11"
},
{
"created": "Tue, 18 Apr 2006 20:18:39 GMT",
"version": "v12"
},
{
... | 2007-07-11 | [
[
"Sarfatti",
"Jack",
""
]
] | A surprisingly simple holographic explanation for the low dark energy density is suggested. I derive the Einstein-Cartan disclination curvature tetrads and the physically independent dislocation torsion gap spin connections from an "M-Matrix" of non-closed Cartan 1-forms made from 8 Goldstone phase 0-forms of the vacuu... |
0709.0551 | Daniel Sudarsky | Yuri Bonder and Daniel Sudarsky | Quantum Gravity Phenomenology without Lorentz Invariance Violation: a
detailed proposal | LaTeX, 24 pages. To be published in Classical and Quantum Gravity | Class.Quant.Grav.25:105017,2008 | 10.1088/0264-9381/25/10/105017 | null | gr-qc hep-th | null | We describe a scheme for the exploration of quantum gravity phenomenology
focussing on effects that could be thought as arising from a fundamental
granularity of space-time. In contrast with the simplest assumptions, such
granularity is assumed to respect Lorentz Invariance but is otherwise left
unspecified. The prop... | [
{
"created": "Wed, 5 Sep 2007 00:25:34 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Dec 2007 20:13:36 GMT",
"version": "v2"
},
{
"created": "Tue, 22 Apr 2008 17:18:39 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Bonder",
"Yuri",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | We describe a scheme for the exploration of quantum gravity phenomenology focussing on effects that could be thought as arising from a fundamental granularity of space-time. In contrast with the simplest assumptions, such granularity is assumed to respect Lorentz Invariance but is otherwise left unspecified. The propos... |
1803.06335 | Shinji Tsujikawa | Ryotaro Kase, Masato Minamitsuji, Shinji Tsujikawa | Black holes in quartic-order beyond-generalized Proca theories | 14 pages, 1 figure | Phys. Lett. B782 (2018) 541-550 | 10.1016/j.physletb.2018.05.078 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The generalized Proca theories with second-order equations of motion can be
healthily extended to a more general framework in which the number of
propagating degrees of freedom remains unchanged. In the presence of a
quartic-order nonminimal coupling to gravity arising in beyond-generalized
Proca theories, the speed ... | [
{
"created": "Fri, 16 Mar 2018 17:37:35 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jun 2018 23:53:19 GMT",
"version": "v2"
}
] | 2018-06-15 | [
[
"Kase",
"Ryotaro",
""
],
[
"Minamitsuji",
"Masato",
""
],
[
"Tsujikawa",
"Shinji",
""
]
] | The generalized Proca theories with second-order equations of motion can be healthily extended to a more general framework in which the number of propagating degrees of freedom remains unchanged. In the presence of a quartic-order nonminimal coupling to gravity arising in beyond-generalized Proca theories, the speed of... |
2204.03833 | Yan Peng | Guohua Liu, Yan Peng | A no-go theorem for scalar fields with couplings from Ginzburg-Landau
models | 6 pages | null | 10.1140/epjc/s10052-022-10497-5 | null | gr-qc cond-mat.supr-con hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently Hod proved a no-go theorem that static scalar fields cannot form
spherically symmetric boson stars in the asymptotically flat background. On the
other side, scalar fields can be coupled to the gradient according to
next-to-leading order Ginzburg-Landau models. In the present work, we extend
Hod's discussions... | [
{
"created": "Fri, 8 Apr 2022 04:18:11 GMT",
"version": "v1"
}
] | 2022-07-13 | [
[
"Liu",
"Guohua",
""
],
[
"Peng",
"Yan",
""
]
] | Recently Hod proved a no-go theorem that static scalar fields cannot form spherically symmetric boson stars in the asymptotically flat background. On the other side, scalar fields can be coupled to the gradient according to next-to-leading order Ginzburg-Landau models. In the present work, we extend Hod's discussions b... |
1909.11756 | Hector O. Silva | Hector O. Silva, Masato Minamitsuji | Cosmological attractors to general relativity and spontaneous
scalarization with disformal coupling | (v1) 10 pages, 2 figures. (v2) typos corrected. (v3) 11 pages, new
references, matches published version | Phys. Rev. D 100, 104012 (2019) | 10.1103/PhysRevD.100.104012 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The canonical scalar-tensor theory model which exhibits spontaneous
scalarization in the strong-gravity regime of neutron stars has long been known
to predict a cosmological evolution for the scalar field which generically
results in severe violations of present-day Solar System constraints on
deviations from general... | [
{
"created": "Wed, 25 Sep 2019 20:38:45 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Sep 2019 04:10:23 GMT",
"version": "v2"
},
{
"created": "Fri, 8 Nov 2019 03:41:41 GMT",
"version": "v3"
}
] | 2019-11-11 | [
[
"Silva",
"Hector O.",
""
],
[
"Minamitsuji",
"Masato",
""
]
] | The canonical scalar-tensor theory model which exhibits spontaneous scalarization in the strong-gravity regime of neutron stars has long been known to predict a cosmological evolution for the scalar field which generically results in severe violations of present-day Solar System constraints on deviations from general r... |
gr-qc/9905109 | Uwe Gunther | U. Guenther, A. Zhuk | Observable effects from extra dimensions | 4 pages, LaTeX2e | Grav.Cosmol. 5 (1999) 167-169 | null | null | gr-qc astro-ph hep-ph hep-th | null | For any multidimensional theory with compactified internal spaces, conformal
excitations of the internal space metric result in gravitational excitons in
the external spacetime. These excitations contribute either to dark matter or
to cross sections of usual particles.
| [
{
"created": "Mon, 31 May 1999 12:48:39 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Guenther",
"U.",
""
],
[
"Zhuk",
"A.",
""
]
] | For any multidimensional theory with compactified internal spaces, conformal excitations of the internal space metric result in gravitational excitons in the external spacetime. These excitations contribute either to dark matter or to cross sections of usual particles. |
1501.01953 | Alessandro Fabbri | Paul R. Anderson, Alessandro Fabbri, Roberto Balbinot | Low frequency gray-body factors and infrared divergences: rigorous
results | 41 pages, 5 figures | Phys. Rev. D 91, 064061 (2015) | 10.1103/PhysRevD.91.064061 | null | gr-qc cond-mat.quant-gas hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Formal solutions to the mode equations for both spherically symmetric black
holes and Bose-Einstein condensate acoustic black holes are obtained by writing
the spatial part of the mode equation as a linear Volterra integral equation of
the second kind. The solutions work for a massless minimally coupled scalar
field ... | [
{
"created": "Thu, 8 Jan 2015 20:46:49 GMT",
"version": "v1"
}
] | 2015-04-08 | [
[
"Anderson",
"Paul R.",
""
],
[
"Fabbri",
"Alessandro",
""
],
[
"Balbinot",
"Roberto",
""
]
] | Formal solutions to the mode equations for both spherically symmetric black holes and Bose-Einstein condensate acoustic black holes are obtained by writing the spatial part of the mode equation as a linear Volterra integral equation of the second kind. The solutions work for a massless minimally coupled scalar field in... |
1703.10843 | Donato Bini | Donato Bini, Carmen Chicone and Bahram Mashhoon | Relativistic Tidal Acceleration of Astrophysical Jets | 26 pages, 6 figures, revtex macros used. Revised version matching the
published one. v3: typos corrected in equations (5) and (10)-(12) | Phys. Rev. D 95, 104029 (2017) | 10.1103/PhysRevD.95.104029 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the framework of general relativity, we investigate the tidal
acceleration of astrophysical jets relative to the central collapsed
configuration ("Kerr source"). We neglect electromagnetic forces throughout.
The rest frame of the Kerr source is locally defined via the set of
hypothetical static observers in th... | [
{
"created": "Fri, 31 Mar 2017 10:39:09 GMT",
"version": "v1"
},
{
"created": "Sat, 27 May 2017 10:11:26 GMT",
"version": "v2"
},
{
"created": "Mon, 28 Dec 2020 17:46:01 GMT",
"version": "v3"
}
] | 2020-12-29 | [
[
"Bini",
"Donato",
""
],
[
"Chicone",
"Carmen",
""
],
[
"Mashhoon",
"Bahram",
""
]
] | Within the framework of general relativity, we investigate the tidal acceleration of astrophysical jets relative to the central collapsed configuration ("Kerr source"). We neglect electromagnetic forces throughout. The rest frame of the Kerr source is locally defined via the set of hypothetical static observers in the ... |
0902.3813 | Khalid Saifullah | K. Saifullah and Shair-e-Yazdan | Conformal motions in plane symmetric static spacetimes | 13 pages | Int.J.Mod.Phys.D18:71-81,2009 | 10.1142/S0218271809014340 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, conformal motions are studied in plane symmetric static
spacetimes. The general solution of conformal Killing equations and the general
form of the conformal Killing vector for these spacetimes are presented. All
possibilities for the existence of conformal motions in these spacetimes are
exhausted.
| [
{
"created": "Sun, 22 Feb 2009 18:49:43 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Apr 2009 19:53:19 GMT",
"version": "v2"
}
] | 2009-11-13 | [
[
"Saifullah",
"K.",
""
],
[
"Shair-e-Yazdan",
"",
""
]
] | In this paper, conformal motions are studied in plane symmetric static spacetimes. The general solution of conformal Killing equations and the general form of the conformal Killing vector for these spacetimes are presented. All possibilities for the existence of conformal motions in these spacetimes are exhausted. |
1404.7422 | Antoine Folacci | Andrei Belokogne and Antoine Folacci | Renormalized stress tensor for massive fields in Kerr-Newman spacetime | v2: Presentation greatly improved, discussions and references
added.v3: Matches the published version | Physical Review D 90, 044045 (2014) | 10.1103/PhysRevD.90.044045 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a four-dimensional spacetime, the DeWitt-Schwinger expansion of the
effective action associated with a massive quantum field reduces, after
renormalization and in the large mass limit, to a single term constructed from
the purely geometrical Gilkey-DeWitt coefficient $a_3$ and its metric variation
provides a good ... | [
{
"created": "Tue, 29 Apr 2014 16:23:55 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Jul 2014 18:41:47 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Sep 2014 15:22:39 GMT",
"version": "v3"
}
] | 2014-09-12 | [
[
"Belokogne",
"Andrei",
""
],
[
"Folacci",
"Antoine",
""
]
] | In a four-dimensional spacetime, the DeWitt-Schwinger expansion of the effective action associated with a massive quantum field reduces, after renormalization and in the large mass limit, to a single term constructed from the purely geometrical Gilkey-DeWitt coefficient $a_3$ and its metric variation provides a good an... |
1906.07560 | Branko Dragovich | I. Dimitrijevic, B. Dragovich, A. S. Koshelev, Z. Rakic and J.
Stankovic | Cosmological Solutions of a Nonlocal Square Root Gravity | version published in Phys. Lett. B | null | 10.1016/j.physletb.2019.134848 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider modification of general relativity extending $R - 2
\Lambda$ by nonlocal term of the form $\sqrt{R-2\Lambda}\, \mathcal{F}(\Box)\,
\sqrt{R-2\Lambda} ,$ where $\mathcal{F}(\Box)$ is an analytic function of the
d'Alembert operator $\Box$. We have found some exact cosmological solutions of
the ... | [
{
"created": "Sun, 16 Jun 2019 19:05:34 GMT",
"version": "v1"
},
{
"created": "Sat, 31 Aug 2019 16:33:44 GMT",
"version": "v2"
}
] | 2019-09-04 | [
[
"Dimitrijevic",
"I.",
""
],
[
"Dragovich",
"B.",
""
],
[
"Koshelev",
"A. S.",
""
],
[
"Rakic",
"Z.",
""
],
[
"Stankovic",
"J.",
""
]
] | In this paper we consider modification of general relativity extending $R - 2 \Lambda$ by nonlocal term of the form $\sqrt{R-2\Lambda}\, \mathcal{F}(\Box)\, \sqrt{R-2\Lambda} ,$ where $\mathcal{F}(\Box)$ is an analytic function of the d'Alembert operator $\Box$. We have found some exact cosmological solutions of the co... |
2004.05882 | Anton Sheykin | A. A. Sheykin, M. V. Markov, Ya. A. Fedulov and S. A. Paston | Explicit isometric embeddings of pseudo-Riemannian manifolds: ideas and
applications | 7 pages. The minor typo in eq. (10) of published version is corrected
here, minor clarifications are also made | J. Phys. Conf. Ser., Vol. 1697, 012077 (2020) | 10.1088/1742-6596/1697/1/012077 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the problem of construction of explicit isometric embeddings of
(pseudo)-Riemannian manifolds. We discuss the method which is based in the idea
that the exterior symmetry of the embedded surface and the interior symmetry of
the metric on it must be the same. In case of high enough symmetry of the
metric such... | [
{
"created": "Mon, 13 Apr 2020 12:02:36 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Dec 2020 10:46:01 GMT",
"version": "v2"
}
] | 2020-12-17 | [
[
"Sheykin",
"A. A.",
""
],
[
"Markov",
"M. V.",
""
],
[
"Fedulov",
"Ya. A.",
""
],
[
"Paston",
"S. A.",
""
]
] | We study the problem of construction of explicit isometric embeddings of (pseudo)-Riemannian manifolds. We discuss the method which is based in the idea that the exterior symmetry of the embedded surface and the interior symmetry of the metric on it must be the same. In case of high enough symmetry of the metric such m... |
gr-qc/9409013 | Gary Horowitz | S. W. Hawking, Gary T. Horowitz, and Simon F. Ross | Entropy, Area, and Black Hole Pairs | 25 pages; DAMTP/R 94-26, UCSBTH-94-25 (minor errors and references
corrected) | Phys.Rev.D51:4302-4314,1995 | 10.1103/PhysRevD.51.4302 | null | gr-qc hep-th | null | We clarify the relation between gravitational entropy and the area of
horizons. We first show that the entropy of an extreme Reissner-Nordstr\"om
black hole is $zero$, despite the fact that its horizon has nonzero area. Next,
we consider the pair creation of extremal and nonextremal black holes. It is
shown that the ... | [
{
"created": "Thu, 8 Sep 1994 00:21:02 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Sep 1994 17:56:52 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Hawking",
"S. W.",
""
],
[
"Horowitz",
"Gary T.",
""
],
[
"Ross",
"Simon F.",
""
]
] | We clarify the relation between gravitational entropy and the area of horizons. We first show that the entropy of an extreme Reissner-Nordstr\"om black hole is $zero$, despite the fact that its horizon has nonzero area. Next, we consider the pair creation of extremal and nonextremal black holes. It is shown that the ac... |
gr-qc/0307036 | Bernd Reimann | Bernd Reimann, Bernd Bruegmann | Maximal Slicing for Puncture Evolutions of Schwarzschild and
Reissner-Nordstr\"om Black Holes | 21 pages, 9 figures, published version with changes to Sec. VII | Phys.Rev.D69:044006,2004 | 10.1103/PhysRevD.69.044006 | AEI-2003-058, CGPG-03/7-1 | gr-qc | null | We prove by explicit construction that there exists a maximal slicing of the
Schwarzschild spacetime such that the lapse has zero gradient at the puncture.
This boundary condition has been observed to hold in numerical evolutions, but
in the past it was not clear whether the numerically obtained maximal slices
exist ... | [
{
"created": "Wed, 9 Jul 2003 08:29:56 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Feb 2004 17:35:02 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Reimann",
"Bernd",
""
],
[
"Bruegmann",
"Bernd",
""
]
] | We prove by explicit construction that there exists a maximal slicing of the Schwarzschild spacetime such that the lapse has zero gradient at the puncture. This boundary condition has been observed to hold in numerical evolutions, but in the past it was not clear whether the numerically obtained maximal slices exist an... |
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