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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1008.0796 | Bijunath Patla | James D. Phillips, Bijunath R. Patla, Eugeniu M. Popescu, Emanuele
Rocco, Rajesh Thapa, Robert D. Reasenberg and Enrico C. Lorenzini | Weak Equivalence Principle Test on a Sounding Rocket | Presented at the Fifth Meeting on CPT and Lorentz Symmetry,
Bloomington, Indiana, June 28-July 2, 2010 | null | 10.1142/9789814327688_0040 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | SR-POEM, our principle of equivalence measurement on a sounding rocket, will
compare the free fall rate of two substances yielding an uncertainty of E-16 in
the estimate of \eta. During the past two years, the design concept has matured
and we have been working on the required technology, including a laser gauge
that... | [
{
"created": "Wed, 4 Aug 2010 14:54:26 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Phillips",
"James D.",
""
],
[
"Patla",
"Bijunath R.",
""
],
[
"Popescu",
"Eugeniu M.",
""
],
[
"Rocco",
"Emanuele",
""
],
[
"Thapa",
"Rajesh",
""
],
[
"Reasenberg",
"Robert D.",
""
],
[
"Lorenzini",
"Enrico C... | SR-POEM, our principle of equivalence measurement on a sounding rocket, will compare the free fall rate of two substances yielding an uncertainty of E-16 in the estimate of \eta. During the past two years, the design concept has matured and we have been working on the required technology, including a laser gauge that i... |
gr-qc/0703073 | Ingemar Eriksson | G. Bergqvist and I. Eriksson | The Chevreton Tensor and Einstein-Maxwell Spacetimes Conformal to
Einstein Spaces | 22 pages. Corrected equation (12) | Class.Quant.Grav.24:3437-3456,2007 | 10.1088/0264-9381/24/13/018 | null | gr-qc | null | In this paper we characterize the source-free Einstein-Maxwell spacetimes
which have a trace-free Chevreton tensor. We show that this is equivalent to
the Chevreton tensor being of pure-radiation type and that it restricts the
spacetimes to Petrov types \textbf{N} or \textbf{O}. We prove that the trace of
the Chevret... | [
{
"created": "Tue, 13 Mar 2007 17:48:39 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Mar 2007 12:47:08 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bergqvist",
"G.",
""
],
[
"Eriksson",
"I.",
""
]
] | In this paper we characterize the source-free Einstein-Maxwell spacetimes which have a trace-free Chevreton tensor. We show that this is equivalent to the Chevreton tensor being of pure-radiation type and that it restricts the spacetimes to Petrov types \textbf{N} or \textbf{O}. We prove that the trace of the Chevreton... |
2107.01455 | Hideki Maeda | Hideki Maeda | Hawking-Ellis type of matter on Killing horizons in symmetric spacetimes | 7 pages, 1 table, no figure; v3, final version published in Physical
Review D | Phys.Rev.D 104 (2021) 8, 084088 | 10.1103/PhysRevD.104.084088 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spherically, plane, or hyperbolically symmetric spacetimes with an additional
hypersurface orthogonal Killing vector are often called ``static'' spacetimes
even if they contain regions where the Killing vector is non-timelike. It seems
to be widely believed that an energy-momentum tenor for a matter field
compatible ... | [
{
"created": "Sat, 3 Jul 2021 15:52:20 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Aug 2021 12:49:53 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Nov 2021 09:41:12 GMT",
"version": "v3"
}
] | 2021-11-02 | [
[
"Maeda",
"Hideki",
""
]
] | Spherically, plane, or hyperbolically symmetric spacetimes with an additional hypersurface orthogonal Killing vector are often called ``static'' spacetimes even if they contain regions where the Killing vector is non-timelike. It seems to be widely believed that an energy-momentum tenor for a matter field compatible wi... |
gr-qc/0509042 | Pavel Nakaznoy A | P.I.Fomin, P.A.Nakaznoy, S.I.Vilchinskyi | The Closed Cosmological Model with Variable Lambda-term | The 13-th general Conference of the European Physical Society "Beyond
Einstein - Physics for the 21-st Century", Bern 2005 | null | null | null | gr-qc | null | We have studied the closed universe model with the variable cosmological
term, which is presented as a sum of two terms: Lambda=Lambda_0 -k R. First
term Lambda_0 is a constant and it is describing a sum of quantum field's zero
oscillations. In the geometrical sense it determines an own constant curvature
of the spac... | [
{
"created": "Tue, 13 Sep 2005 18:41:11 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Fomin",
"P. I.",
""
],
[
"Nakaznoy",
"P. A.",
""
],
[
"Vilchinskyi",
"S. I.",
""
]
] | We have studied the closed universe model with the variable cosmological term, which is presented as a sum of two terms: Lambda=Lambda_0 -k R. First term Lambda_0 is a constant and it is describing a sum of quantum field's zero oscillations. In the geometrical sense it determines an own constant curvature of the space-... |
2308.01310 | Gaurav Narain | Manishankar Ailiga, Shubhashis Mallik, Gaurav Narain | Lorentzian Robin Universe | v3: Accepted in JHEP. 1+38 pages, 5 figures. Text and references
added | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we delve into the gravitational path integral of Gauss-Bonnet
gravity in four spacetime dimensions, in the mini-superspace approximation. Our
primary focus lies in investigating the transition amplitude between distinct
boundary configurations. Of particular interest is the case of Robin boundary
condi... | [
{
"created": "Wed, 2 Aug 2023 17:55:49 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Aug 2023 17:11:12 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Jan 2024 18:09:57 GMT",
"version": "v3"
}
] | 2024-01-09 | [
[
"Ailiga",
"Manishankar",
""
],
[
"Mallik",
"Shubhashis",
""
],
[
"Narain",
"Gaurav",
""
]
] | In this paper, we delve into the gravitational path integral of Gauss-Bonnet gravity in four spacetime dimensions, in the mini-superspace approximation. Our primary focus lies in investigating the transition amplitude between distinct boundary configurations. Of particular interest is the case of Robin boundary conditi... |
gr-qc/0211028 | Thomas W. Baumgarte | Thomas W. Baumgarte and Stuart L. Shapiro | Numerical Relativity and Compact Binaries | 122 pages, 19 figures; review article to appear in Physics Reports | Phys.Rept.376:41-131,2003 | 10.1016/S0370-1573(02)00537-9 | null | gr-qc astro-ph hep-ph | null | Numerical relativity is the most promising tool for theoretically modeling
the inspiral and coalescence of neutron star and black hole binaries, which, in
turn, are among the most promising sources of gravitational radiation for
future detection by gravitational wave observatories. In this article we review
numerical... | [
{
"created": "Thu, 7 Nov 2002 21:04:14 GMT",
"version": "v1"
}
] | 2009-07-09 | [
[
"Baumgarte",
"Thomas W.",
""
],
[
"Shapiro",
"Stuart L.",
""
]
] | Numerical relativity is the most promising tool for theoretically modeling the inspiral and coalescence of neutron star and black hole binaries, which, in turn, are among the most promising sources of gravitational radiation for future detection by gravitational wave observatories. In this article we review numerical r... |
0810.2715 | Mauricio Cataldo MC | Mauricio Cataldo, Pedro Labrana, Sergio del Campo, Juan Crisostomo and
Patricio Salgado | Evolving Lorentzian wormholes supported by phantom matter with constant
state parameters | 9 pages, 2 figures, Accepted for publication in Phys. Rev. D | Phys.Rev.D78:104006,2008 | 10.1103/PhysRevD.78.104006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the possibility of sustaining an evolving wormhole via
exotic matter made out of phantom energy. We show that this exotic source can
support the existence of evolving wormhole spacetimes. Explicitly, a family of
evolving Lorentzian wormholes conformally related to another family of
zero-tidal f... | [
{
"created": "Wed, 15 Oct 2008 14:53:52 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Cataldo",
"Mauricio",
""
],
[
"Labrana",
"Pedro",
""
],
[
"del Campo",
"Sergio",
""
],
[
"Crisostomo",
"Juan",
""
],
[
"Salgado",
"Patricio",
""
]
] | In this paper we study the possibility of sustaining an evolving wormhole via exotic matter made out of phantom energy. We show that this exotic source can support the existence of evolving wormhole spacetimes. Explicitly, a family of evolving Lorentzian wormholes conformally related to another family of zero-tidal for... |
1902.00825 | Fabi\'an Villalba | F. D. Villalba and P. Bargue\~no | Quasilocal Smarr relations for static black holes | 12 pages, 1 figure. Accepted for publication in Physical Review D | Phys. Rev. D 99, 044021 (2019) | 10.1103/PhysRevD.99.044021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Generalized Smarr relations in terms of quasilocal variables are obtained for
Schwarzschild and Reissner-Nordstr\"om black holes. The approach is based on
gravitational path integrals with finite boundaries on which, following Brown
and York, thermodynamic variables are identified through a Hamilton-Jacobi
analysis o... | [
{
"created": "Sun, 3 Feb 2019 01:25:32 GMT",
"version": "v1"
}
] | 2019-02-20 | [
[
"Villalba",
"F. D.",
""
],
[
"Bargueño",
"P.",
""
]
] | Generalized Smarr relations in terms of quasilocal variables are obtained for Schwarzschild and Reissner-Nordstr\"om black holes. The approach is based on gravitational path integrals with finite boundaries on which, following Brown and York, thermodynamic variables are identified through a Hamilton-Jacobi analysis of ... |
gr-qc/0408057 | Dr. Anirudh Pradhan | Anirudh Pradhan, Kashika Srivastava, Amrit Lal Ahuja | Nonsingular Spherical Models with a Variable Cosmological term | 19 pages, 6 figures, submitted to Fizika B (Zagreb) | Fizika B16:141-158,2007 | null | null | gr-qc | null | Exact solutions of the Einstein's field equations describing a spherically
symmetric cosmological model without a big bang or any other kind of
singularity recently obtained by Dadhich and Patel (2000) are revisited. The
matter content of the model is a shear-free perfect fluid with isotropic
pressure and a radial he... | [
{
"created": "Wed, 18 Aug 2004 10:07:45 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Mar 2007 07:00:28 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Srivastava",
"Kashika",
""
],
[
"Ahuja",
"Amrit Lal",
""
]
] | Exact solutions of the Einstein's field equations describing a spherically symmetric cosmological model without a big bang or any other kind of singularity recently obtained by Dadhich and Patel (2000) are revisited. The matter content of the model is a shear-free perfect fluid with isotropic pressure and a radial heat... |
2007.03835 | Nomaan X | Joachim Kambor and Nomaan X | Manifold Properties from Causal Sets using Chains | 30 pages, 12 figures | null | 10.1088/1361-6382/abc8c9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the utility of chains defined on causal sets in estimating continuum
properties like the curvature, the proper time and the spacetime dimension
through a numerical analysis. In particular, we show that in $\text{dS}_2$ and
$\text{FLRW}_3$ spacetimes the formalism of arXiv:1212.0631 with slight
modifications ... | [
{
"created": "Wed, 8 Jul 2020 01:07:08 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Oct 2020 10:58:26 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Nov 2020 06:16:58 GMT",
"version": "v3"
}
] | 2020-11-11 | [
[
"Kambor",
"Joachim",
""
],
[
"X",
"Nomaan",
""
]
] | We study the utility of chains defined on causal sets in estimating continuum properties like the curvature, the proper time and the spacetime dimension through a numerical analysis. In particular, we show that in $\text{dS}_2$ and $\text{FLRW}_3$ spacetimes the formalism of arXiv:1212.0631 with slight modifications gi... |
gr-qc/0309059 | Laszlo A. Gergely | L\'aszl\'o \'A Gergely | A homogeneous brane-world universe | null | Class.Quant.Grav. 21 (2004) 935-940 | 10.1088/0264-9381/21/4/013 | null | gr-qc astro-ph hep-th | null | A homogeneous, Kantowski-Sachs type, bouncing brane-world universe is
presented. The bulk has a positive cosmological constant and the Killing
algebra $so(1,3)\oplus so(3)$. The totality of the source terms of the
effective Einstein equation combine to a solid with different radial and
tangential pressures.
| [
{
"created": "Thu, 11 Sep 2003 17:06:59 GMT",
"version": "v1"
}
] | 2016-08-16 | [
[
"Gergely",
"László Á",
""
]
] | A homogeneous, Kantowski-Sachs type, bouncing brane-world universe is presented. The bulk has a positive cosmological constant and the Killing algebra $so(1,3)\oplus so(3)$. The totality of the source terms of the effective Einstein equation combine to a solid with different radial and tangential pressures. |
1303.7038 | Jorge Mastache | Jorge Mastache, Axel de la Macorra | Extra relativistic degrees of freedom without extra particles using
Planck data | 9 pages, 7 figures, 2 Tables | null | 10.1103/PhysRevD.88.043506 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A recent number of analysis of cosmological data have shown indications for
the presence of extra radiation beyond the standard model at equality and
nucleosynthesis epoch, which has been usually interpreted as an effective
number of neutrinos, Neff > 3.046. In this work we establish the theoretical
basis for a parti... | [
{
"created": "Thu, 28 Mar 2013 04:53:44 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Apr 2013 20:16:29 GMT",
"version": "v2"
}
] | 2013-08-14 | [
[
"Mastache",
"Jorge",
""
],
[
"de la Macorra",
"Axel",
""
]
] | A recent number of analysis of cosmological data have shown indications for the presence of extra radiation beyond the standard model at equality and nucleosynthesis epoch, which has been usually interpreted as an effective number of neutrinos, Neff > 3.046. In this work we establish the theoretical basis for a particl... |
1304.2228 | Jan Steinhoff | Sayan Chakrabarti, T\'erence Delsate, Jan Steinhoff | New perspectives on neutron star and black hole spectroscopy and dynamic
tides | RevTeX, 18 pages, 1 figure, v2: added references, v3: corrected
integration constants in Eq. (12), neutron star case essentially unaffected | null | null | null | gr-qc astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We elaborate on a powerful tidal interaction formalism where the multipole
dynamics is kept generic and encoded in a linear response function. This
response function is the gravitational counterpart of the atomic spectrum and
can become of similar importance with the rise of gravitational wave astronomy.
We find that... | [
{
"created": "Mon, 8 Apr 2013 15:04:33 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Apr 2013 19:58:58 GMT",
"version": "v2"
},
{
"created": "Tue, 21 May 2013 14:30:39 GMT",
"version": "v3"
}
] | 2013-05-22 | [
[
"Chakrabarti",
"Sayan",
""
],
[
"Delsate",
"Térence",
""
],
[
"Steinhoff",
"Jan",
""
]
] | We elaborate on a powerful tidal interaction formalism where the multipole dynamics is kept generic and encoded in a linear response function. This response function is the gravitational counterpart of the atomic spectrum and can become of similar importance with the rise of gravitational wave astronomy. We find that t... |
gr-qc/0703009 | Frans Klinkhamer | F.R. Klinkhamer | Fundamental length scale of quantum spacetime foam | 10 pages with revtex4, v5: published version | JETPLett.86:73-77,2007 | 10.1134/S0021364007140019 | KA-TP-03-2007 | gr-qc hep-ph hep-th | null | It is argued that the fundamental length scale for the quantum dynamics of
spacetime need not be equal to the Planck length. Possibly, this new length
scale is related to a nonvanishing cosmological constant or vacuum energy
density.
| [
{
"created": "Thu, 1 Mar 2007 19:43:09 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Mar 2007 15:51:59 GMT",
"version": "v2"
},
{
"created": "Wed, 30 May 2007 18:50:05 GMT",
"version": "v3"
},
{
"created": "Thu, 21 Jun 2007 15:20:02 GMT",
"version": "v4"
},
{
"cre... | 2008-11-26 | [
[
"Klinkhamer",
"F. R.",
""
]
] | It is argued that the fundamental length scale for the quantum dynamics of spacetime need not be equal to the Planck length. Possibly, this new length scale is related to a nonvanishing cosmological constant or vacuum energy density. |
1610.08135 | Kai Lin | Kai Lin and Wei-Liang Qian | A Matrix Method for Quasinormal Modes: Schwarzschild Black Holes in
Asymptotically Flat and (Anti-) de Sitter Spacetimes | The program is attached in the ancillary files on the arXiv server | Class. Quantum Grav. 34 (2017) 095004 (13pp) | 10.1088/1361-6382/aa6643 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we study the quasinormal modes of Schwarzschild and
Schwarzschild (Anti-) de Sitter black holes by a matrix method. The proposed
method involves discretizing the master field equation and expressing it in
form of a homogeneous system of linear algebraic equations. The resulting
homogeneous matrix equati... | [
{
"created": "Wed, 26 Oct 2016 01:05:24 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Nov 2016 18:21:43 GMT",
"version": "v2"
},
{
"created": "Tue, 28 Feb 2017 20:46:00 GMT",
"version": "v3"
},
{
"created": "Sat, 1 Apr 2017 18:07:34 GMT",
"version": "v4"
}
] | 2017-04-04 | [
[
"Lin",
"Kai",
""
],
[
"Qian",
"Wei-Liang",
""
]
] | In this work, we study the quasinormal modes of Schwarzschild and Schwarzschild (Anti-) de Sitter black holes by a matrix method. The proposed method involves discretizing the master field equation and expressing it in form of a homogeneous system of linear algebraic equations. The resulting homogeneous matrix equation... |
2305.18522 | Kyriakos Destounis Dr. | Kyriakos Destounis and Kostas D. Kokkotas | Slowly-rotating compact objects: the nonintegrability of Hartle-Thorne
particle geodesics | 15 pages, 5 figures, minor revision, abstract abridged due to arxiv
limitations, accepted for publication in General Relativity and Gravitation | Gen Relativ Gravit 55, 123 (2023) | 10.1007/s10714-023-03170-z | null | gr-qc astro-ph.HE hep-th nlin.CD | http://creativecommons.org/licenses/by/4.0/ | X-ray astronomy provides information regarding the electromagnetic emission
of active galactic nuclei and X-ray binaries. These events provide details
regarding the astrophysical environment of black holes and stars, and help us
understand gamma-ray bursts. They produce estimates for the maximum mass of
neutron stars... | [
{
"created": "Mon, 29 May 2023 18:00:03 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Oct 2023 14:36:19 GMT",
"version": "v2"
}
] | 2023-11-01 | [
[
"Destounis",
"Kyriakos",
""
],
[
"Kokkotas",
"Kostas D.",
""
]
] | X-ray astronomy provides information regarding the electromagnetic emission of active galactic nuclei and X-ray binaries. These events provide details regarding the astrophysical environment of black holes and stars, and help us understand gamma-ray bursts. They produce estimates for the maximum mass of neutron stars a... |
1908.00509 | Ozgur Delice | M. Haluk Se\c{c}uk, \"Ozg\"ur Delice | Bending of Light from Reissner-Nordstr\"om-de Sitter-Monopole Black Hole | v2: 10 pages, 2 figures, matches the published version | Eur. Phys. J. Plus, 135 7 (2020) 610 | 10.1140/epjp/s13360-020-00551-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study light deflection from a Reissner-Nordstr\"om-de Sitter black hole in
the gravitational monopole background. We first calculate the orbit equation
and the contribution of the monopole and black hole parameters to the
deflection angle up to second-order for the vanishing cosmological constant
case using the Ri... | [
{
"created": "Thu, 1 Aug 2019 17:07:03 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Aug 2020 21:19:43 GMT",
"version": "v2"
}
] | 2020-08-05 | [
[
"Seçuk",
"M. Haluk",
""
],
[
"Delice",
"Özgür",
""
]
] | We study light deflection from a Reissner-Nordstr\"om-de Sitter black hole in the gravitational monopole background. We first calculate the orbit equation and the contribution of the monopole and black hole parameters to the deflection angle up to second-order for the vanishing cosmological constant case using the Rind... |
2012.00002 | Mohammad Reza Setare | M. R. Setare and S. N. Sajadi | Phase Transition Between Flat Space Cosmology and Hot Flat Spacetimes in
GMMG and EGMG Models | 13 pages, typos corrected, main results and conclusion unchanged,
reference and paragraph added | null | 10.1088/1361-6382/ac03f7 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Flat Space Cosmology (FSC) spacetimes are exact solutions of 3D gravity
theories. In this work, we study phase transition between FSC spacetimes and
Hot Flat Spacetimes (HFS) in general minimal massive gravity and exotic general
massive gravity. We show that similar to topological massive gravity the
tunneling occurs... | [
{
"created": "Sat, 28 Nov 2020 13:30:27 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Feb 2021 06:29:03 GMT",
"version": "v2"
}
] | 2021-07-07 | [
[
"Setare",
"M. R.",
""
],
[
"Sajadi",
"S. N.",
""
]
] | Flat Space Cosmology (FSC) spacetimes are exact solutions of 3D gravity theories. In this work, we study phase transition between FSC spacetimes and Hot Flat Spacetimes (HFS) in general minimal massive gravity and exotic general massive gravity. We show that similar to topological massive gravity the tunneling occurs b... |
gr-qc/0204034 | J. Mark Heinzle | J. Mark Heinzle | (In)finiteness of Spherically Symmetric Static Perfect Fluids | null | Class.Quant.Grav. 19 (2002) 2835-2852 | 10.1088/0264-9381/19/11/307 | null | gr-qc | null | This work is concerned with the finiteness problem for static, spherically
symmetric perfect fluids in both Newtonian Gravity and General Relativity. We
derive criteria on the barotropic equation of state guaranteeing that the
corresponding perfect fluid solutions possess finite/infinite extent. In the
Newtonian case... | [
{
"created": "Mon, 8 Apr 2002 16:28:36 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Heinzle",
"J. Mark",
""
]
] | This work is concerned with the finiteness problem for static, spherically symmetric perfect fluids in both Newtonian Gravity and General Relativity. We derive criteria on the barotropic equation of state guaranteeing that the corresponding perfect fluid solutions possess finite/infinite extent. In the Newtonian case, ... |
2309.00873 | Theodoros Nakas | Theodoros Nakas, Thomas D. Pappas, Zden\v{e}k Stuchl\'ik | Bridging Dimensions: General Embedding Algorithm and Field-Theory
Reconstruction in 5D Braneworld Models | 5 pages, 1 figure, extended discussion, references added, version to
match the one published in Phys. Rev. D | null | 10.1103/PhysRevD.109.L041501 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We develop a general algorithm that enables the consistent embedding of any
four-dimensional static and spherically symmetric geometry into any
five-dimensional single-brane braneworld model, characterized by an injective
and nonsingular warp factor. Furthermore, we supplement the algorithm by
introducing a method th... | [
{
"created": "Sat, 2 Sep 2023 09:13:10 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Feb 2024 09:23:44 GMT",
"version": "v2"
}
] | 2024-02-23 | [
[
"Nakas",
"Theodoros",
""
],
[
"Pappas",
"Thomas D.",
""
],
[
"Stuchlík",
"Zdeněk",
""
]
] | We develop a general algorithm that enables the consistent embedding of any four-dimensional static and spherically symmetric geometry into any five-dimensional single-brane braneworld model, characterized by an injective and nonsingular warp factor. Furthermore, we supplement the algorithm by introducing a method that... |
2005.02208 | Messias De Brito Cruz | M. B. Cruz, F. A. Brito and C. A. S. Silva | Polar gravitational perturbations and quasinormal modes of a loop
quantum gravity black hole | 16 pages, 5 figures. This manuscript has been accepted for
publication as a Regular Article in Physical Review D | Phys. Rev. D 102, 044063 (2020) | 10.1103/PhysRevD.102.044063 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we have calculated the polar gravitational quasinormal modes
for a quantum corrected black hole model, that arises in the context of Loop
Quantum Gravity, known as Self-Dual Black Hole. In this way, we have calculated
the characteristic frequencies using the WKB approach, where we can verify a
strong de... | [
{
"created": "Mon, 4 May 2020 17:39:47 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Jul 2020 14:46:59 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Aug 2020 17:04:03 GMT",
"version": "v3"
}
] | 2020-09-09 | [
[
"Cruz",
"M. B.",
""
],
[
"Brito",
"F. A.",
""
],
[
"Silva",
"C. A. S.",
""
]
] | In this work, we have calculated the polar gravitational quasinormal modes for a quantum corrected black hole model, that arises in the context of Loop Quantum Gravity, known as Self-Dual Black Hole. In this way, we have calculated the characteristic frequencies using the WKB approach, where we can verify a strong depe... |
2003.07649 | Peter Horvathy | K. Andrzejewski, N. Dimakis, M. Elbistan, P. A. Horvathy, P. Kosinski,
P.-M. Zhang | Conformal symmetries and integrals of the motion in pp waves with
external electromagnetic fields | Published as Annals of Physics 418 (2020) 168180. 39 pages, 1 figure | null | 10.1016/j.aop.2020.168180 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The integrals of the motion associated with conformal Killing vectors of a
curved space-time with an additional electromagnetic background are studied for
massive particles. They involve a new term which might be non-local. The
difficulty disappears for pp-waves, for which explicit, local conserved charges
are found.... | [
{
"created": "Tue, 17 Mar 2020 11:28:46 GMT",
"version": "v1"
},
{
"created": "Fri, 1 May 2020 16:33:46 GMT",
"version": "v2"
}
] | 2020-05-04 | [
[
"Andrzejewski",
"K.",
""
],
[
"Dimakis",
"N.",
""
],
[
"Elbistan",
"M.",
""
],
[
"Horvathy",
"P. A.",
""
],
[
"Kosinski",
"P.",
""
],
[
"Zhang",
"P. -M.",
""
]
] | The integrals of the motion associated with conformal Killing vectors of a curved space-time with an additional electromagnetic background are studied for massive particles. They involve a new term which might be non-local. The difficulty disappears for pp-waves, for which explicit, local conserved charges are found. A... |
1911.02299 | Albert Huber | Albert Huber | The gravitational Field of a massless Particle on the Horizon of a
stationary Black Hole | 30 pages, no figures; published in CQG | Classical and Quantum Gravity, 2021 | 10.1088/1361-6382/abe881 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, the field of a gravitational shockwave generated by a massless
point-like particle is calculated at the event horizon of a stationary
Kerr-Newman black hole. Using the geometric framework of generalized
Kerr-Schild deformations in combination with the spin-coefficient formalism of
Newman and Penrose, it... | [
{
"created": "Wed, 6 Nov 2019 10:45:07 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Mar 2021 17:56:05 GMT",
"version": "v2"
}
] | 2021-03-30 | [
[
"Huber",
"Albert",
""
]
] | In this work, the field of a gravitational shockwave generated by a massless point-like particle is calculated at the event horizon of a stationary Kerr-Newman black hole. Using the geometric framework of generalized Kerr-Schild deformations in combination with the spin-coefficient formalism of Newman and Penrose, it i... |
2405.21072 | Philip Lynch PhD | Philip Lynch, Vojt\v{e}ch Witzany, Maarten van de Meent, Niels
Warburton | Fast inspirals and the treatment of orbital resonances | 48 pages, 11 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Extreme mass ratio inspirals (EMRIs), where a compact object orbits a massive
black hole, are a key source of gravitational waves for the future Laser
Interferometer Space Antenna (LISA). Due to their small mass ratio, ($\epsilon
\sim 10^{-4}$--$10^{-7}$), the binary evolves slowly and EMRI signals will be
in-band fo... | [
{
"created": "Fri, 31 May 2024 17:58:06 GMT",
"version": "v1"
}
] | 2024-06-03 | [
[
"Lynch",
"Philip",
""
],
[
"Witzany",
"Vojtěch",
""
],
[
"van de Meent",
"Maarten",
""
],
[
"Warburton",
"Niels",
""
]
] | Extreme mass ratio inspirals (EMRIs), where a compact object orbits a massive black hole, are a key source of gravitational waves for the future Laser Interferometer Space Antenna (LISA). Due to their small mass ratio, ($\epsilon \sim 10^{-4}$--$10^{-7}$), the binary evolves slowly and EMRI signals will be in-band for ... |
2205.11650 | Ronald Gamble Jr | Ronald S. Gamble Jr | Spin Tetrad Formalism Of Circular Polarization States In Relativistic
Jets | 11 pages, 4 figures | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Relativistic jets from active galactic nuclei (AGN) have been of peak
interest in the high-energy astrophysics community for their uniquely dynamic
nature and incredible radiative power; emanating from supermassive black holes
and similarly accreting compact dense objects. An overall consensus on
relativistic jet for... | [
{
"created": "Mon, 23 May 2022 22:04:41 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Jun 2022 15:30:57 GMT",
"version": "v2"
},
{
"created": "Wed, 22 May 2024 20:38:23 GMT",
"version": "v3"
}
] | 2024-05-24 | [
[
"Gamble",
"Ronald S.",
"Jr"
]
] | Relativistic jets from active galactic nuclei (AGN) have been of peak interest in the high-energy astrophysics community for their uniquely dynamic nature and incredible radiative power; emanating from supermassive black holes and similarly accreting compact dense objects. An overall consensus on relativistic jet forma... |
gr-qc/0004004 | Jens C. Niemeyer | Jens C. Niemeyer, Raphael Bousso | The nonlinear evolution of de Sitter space instabilities | 10 pages, 8 figures, to appear in PRD | Phys.Rev. D62 (2000) 023503 | 10.1103/PhysRevD.62.023503 | null | gr-qc astro-ph | null | We investigate the quantum evolution of large black holes that nucleate
spontaneously in de Sitter space. By numerical computation in the s-wave and
one-loop approximations, we verify claims that such black holes can initially
"anti-evaporate" instead of shrink. We show, however, that this is a transitory
effect. It ... | [
{
"created": "Sat, 1 Apr 2000 21:58:48 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Niemeyer",
"Jens C.",
""
],
[
"Bousso",
"Raphael",
""
]
] | We investigate the quantum evolution of large black holes that nucleate spontaneously in de Sitter space. By numerical computation in the s-wave and one-loop approximations, we verify claims that such black holes can initially "anti-evaporate" instead of shrink. We show, however, that this is a transitory effect. It is... |
2311.07246 | Wu Bofeng | Bofeng Wu and En-Wei Liang | Multipole expansion of the gravitational field in a general class of
fourth-order theories of gravity and the application in gyroscopic precession | 46 pages,0 figure,accepted by JCAP | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A viable weak-field and slow-motion approximation method is constructed in
$F(R,R_{\mu\nu}R^{\mu\nu}, R_{\mu\nu\rho\sigma}R^{\mu\nu\rho\sigma})$ gravity,
a general class of fourth-order theories of gravity. By applying this method,
the metric, presented in the form of the multipole expansion, outside a
spatially comp... | [
{
"created": "Mon, 13 Nov 2023 11:29:28 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Nov 2023 11:30:47 GMT",
"version": "v2"
},
{
"created": "Thu, 16 Nov 2023 11:43:32 GMT",
"version": "v3"
},
{
"created": "Mon, 5 Feb 2024 13:22:14 GMT",
"version": "v4"
},
{
"cr... | 2024-05-01 | [
[
"Wu",
"Bofeng",
""
],
[
"Liang",
"En-Wei",
""
]
] | A viable weak-field and slow-motion approximation method is constructed in $F(R,R_{\mu\nu}R^{\mu\nu}, R_{\mu\nu\rho\sigma}R^{\mu\nu\rho\sigma})$ gravity, a general class of fourth-order theories of gravity. By applying this method, the metric, presented in the form of the multipole expansion, outside a spatially compac... |
2311.14800 | Carlos A. R. Herdeiro | C. A. R. Herdeiro, E. Radu, N. Sanchis-Gual, N. M. Santos, E. dos
Santos Costa Filho | The non-spherical ground state of Proca stars | 6 pages, 4 figures; ; movies of the numerical simulations reported
can be found in http://gravitation.web.ua.pt/index.php/node/4657 | Phys. Lett. B 852 (2024) 138595 | 10.1016/j.physletb.2024.138595 | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | Spherical Proca Stars (PSs) are regarded as the ground state amongst the
family of PSs. In accordance, spherical PSs are thought to have a fundamental
branch of stable solutions. In this Letter, we provide energetic, morphological
and dynamical evidence that spherical PSs are actually excited states. The
ground state... | [
{
"created": "Fri, 24 Nov 2023 19:00:02 GMT",
"version": "v1"
}
] | 2024-03-29 | [
[
"Herdeiro",
"C. A. R.",
""
],
[
"Radu",
"E.",
""
],
[
"Sanchis-Gual",
"N.",
""
],
[
"Santos",
"N. M.",
""
],
[
"Filho",
"E. dos Santos Costa",
""
]
] | Spherical Proca Stars (PSs) are regarded as the ground state amongst the family of PSs. In accordance, spherical PSs are thought to have a fundamental branch of stable solutions. In this Letter, we provide energetic, morphological and dynamical evidence that spherical PSs are actually excited states. The ground state i... |
1503.04621 | Ioannis Contopoulos | Demetrios B. Papadopoulos, Ioannis Contopoulos, Kostas D. Kokkotas and
Nikolaos Stergioulas | Radiation from charged particles on eccentric orbits in a dipolar
magnetic field around a Schwarzschild black hole | 13 pages, Journal of Mathematical Physics | null | 10.1007/s10714-015-1889-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain an approximate solution for the motion of a charged particle around
a Schwarzschild black hole immersed in a weak dipolar magnetic field. We focus
on eccentric bound orbits in the equatorial plane of the Schwarzschild black
hole and derive an analytic expression for the spectral distribution of the
electrom... | [
{
"created": "Mon, 16 Mar 2015 12:28:08 GMT",
"version": "v1"
}
] | 2015-06-24 | [
[
"Papadopoulos",
"Demetrios B.",
""
],
[
"Contopoulos",
"Ioannis",
""
],
[
"Kokkotas",
"Kostas D.",
""
],
[
"Stergioulas",
"Nikolaos",
""
]
] | We obtain an approximate solution for the motion of a charged particle around a Schwarzschild black hole immersed in a weak dipolar magnetic field. We focus on eccentric bound orbits in the equatorial plane of the Schwarzschild black hole and derive an analytic expression for the spectral distribution of the electromag... |
gr-qc/0207106 | Joshua L. Willis | Abhay Ashtekar, Stephen Fairhurst, and Joshua L. Willis | Quantum gravity, shadow states, and quantum mechanics | 35 pages, no figures, RevTeX4 with AMSTeX; v2: three references
added. v3: Sections IV and V revised in view of discussions at the recent
Schr\"odinger Institute workshop on quantum field theory in curved
space-times. In particular, now this simple quantum mechanical example also
serves as a (partial) introduct... | Class.Quant.Grav. 20 (2003) 1031-1062 | 10.1088/0264-9381/20/6/302 | CGPG-02/7-2 | gr-qc hep-th quant-ph | null | A program was recently initiated to bridge the gap between the Planck scale
physics described by loop quantum gravity and the familiar low energy world. We
illustrate the conceptual problems and their solutions through a toy model:
quantum mechanics of a point particle. Maxwell fields will be discussed in the
second ... | [
{
"created": "Fri, 26 Jul 2002 17:08:42 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Jul 2002 17:16:21 GMT",
"version": "v2"
},
{
"created": "Wed, 20 Nov 2002 23:44:54 GMT",
"version": "v3"
}
] | 2017-08-23 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Fairhurst",
"Stephen",
""
],
[
"Willis",
"Joshua L.",
""
]
] | A program was recently initiated to bridge the gap between the Planck scale physics described by loop quantum gravity and the familiar low energy world. We illustrate the conceptual problems and their solutions through a toy model: quantum mechanics of a point particle. Maxwell fields will be discussed in the second pa... |
gr-qc/0012070 | B. S. Sathyaprakash | T. Damour, B.R. Iyer and B.S. Sathyaprakash | Detecting Binary Black Holes With Efficient and Reliable Templates | 9 pages, 3 figures | null | null | null | gr-qc | null | Detecting binary black holes in interferometer data requires an accurate
knowledge of the orbital phase evolution of the system. From the point of view
of data analysis one also needs fast algorithms to compute the templates that
will employed in searching for black hole binaries. Recently, there has been
progress on... | [
{
"created": "Tue, 19 Dec 2000 15:34:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Damour",
"T.",
""
],
[
"Iyer",
"B. R.",
""
],
[
"Sathyaprakash",
"B. S.",
""
]
] | Detecting binary black holes in interferometer data requires an accurate knowledge of the orbital phase evolution of the system. From the point of view of data analysis one also needs fast algorithms to compute the templates that will employed in searching for black hole binaries. Recently, there has been progress on b... |
1003.4892 | Sergey Pavluchenko | S.A. Pavluchenko | The dynamics of the flat anisotropic models in the Lovelock gravity. I:
The even-dimensional case | 20 pages, 7 figures; v2 - minor corrections, references added | Phys.Rev.D82:104021,2010 | 10.1103/PhysRevD.82.104021 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we give a full description of the dynamics of the flat
anisotropic (4+1)-dimensional cosmological model in the presence of both
Gauss-Bonnet and Einstein contributions. This is the first complete description
of this model with both terms taken into account. Our data is obtained using
the numerical ana... | [
{
"created": "Thu, 25 Mar 2010 13:58:59 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Apr 2010 11:55:22 GMT",
"version": "v2"
}
] | 2010-12-13 | [
[
"Pavluchenko",
"S. A.",
""
]
] | In this article we give a full description of the dynamics of the flat anisotropic (4+1)-dimensional cosmological model in the presence of both Gauss-Bonnet and Einstein contributions. This is the first complete description of this model with both terms taken into account. Our data is obtained using the numerical analy... |
2208.13636 | Pardyumn Kumar Sahoo | Sanjay Mandal, P.K. Sahoo, J.R.L. Santos | Reply to "Comment on `Energy Conditions in $f(Q)$ gravity'" | Published version in PRD | Phys. Rev. D 106 (2022) 048502 | 10.1103/PhysRevD.106.048502 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Recently, Avik De and L.T. How claim that we have not followed an effective
theory approach for $f(Q)$ gravity, missing relevant terms to compute the
energy conditions [Phys. Rev. D 102, 024057 (2020)]. They also state that we
did not present how the pressure and energy density follow a set of energy
condition criter... | [
{
"created": "Mon, 29 Aug 2022 14:37:18 GMT",
"version": "v1"
}
] | 2022-08-30 | [
[
"Mandal",
"Sanjay",
""
],
[
"Sahoo",
"P. K.",
""
],
[
"Santos",
"J. R. L.",
""
]
] | Recently, Avik De and L.T. How claim that we have not followed an effective theory approach for $f(Q)$ gravity, missing relevant terms to compute the energy conditions [Phys. Rev. D 102, 024057 (2020)]. They also state that we did not present how the pressure and energy density follow a set of energy condition criteria... |
2010.07561 | Masato Nozawa | Masato Nozawa | Static spacetimes haunted by a phantom scalar field III: asymptotically
(A)dS solutions | 4 figures, 1 table, 37 pages; v2 to appear in PRD | Phys. Rev. D 103, 024005 (2021) | 10.1103/PhysRevD.103.024005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The static and spherically symmetric solutions in $n(\ge 4)$-dimensional
Einstein-phantom-scalar system fall into three family: (i) the Fisher solution,
(ii) the Ellis-Gibbons solution, and (iii) the Ellis-Bronnikov solution. We
exploit these solutions as seed to generate a bunch of corresponding
asymptotically (A)dS... | [
{
"created": "Thu, 15 Oct 2020 07:21:28 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jan 2021 03:14:55 GMT",
"version": "v2"
}
] | 2021-01-13 | [
[
"Nozawa",
"Masato",
""
]
] | The static and spherically symmetric solutions in $n(\ge 4)$-dimensional Einstein-phantom-scalar system fall into three family: (i) the Fisher solution, (ii) the Ellis-Gibbons solution, and (iii) the Ellis-Bronnikov solution. We exploit these solutions as seed to generate a bunch of corresponding asymptotically (A)dS s... |
1710.03209 | James Dilts | James Dilts, Michael Holst | When Do Spacetimes Have Constant Mean Curvature Slices? | 11 pages | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many results in mathematical relativity, including results for both the
initial data problem and for the evolution problem, rely on the existence of a
constant mean curvature (CMC) Cauchy surface in the underlying spacetime.
However, it is known that some spacetimes have no CMC Cauchy surfaces (slices).
This is an ob... | [
{
"created": "Mon, 9 Oct 2017 17:40:26 GMT",
"version": "v1"
}
] | 2017-10-10 | [
[
"Dilts",
"James",
""
],
[
"Holst",
"Michael",
""
]
] | Many results in mathematical relativity, including results for both the initial data problem and for the evolution problem, rely on the existence of a constant mean curvature (CMC) Cauchy surface in the underlying spacetime. However, it is known that some spacetimes have no CMC Cauchy surfaces (slices). This is an obst... |
2010.05845 | Fabrizio Di Giovanni | Fabrizio Di Giovanni, Nicolas Sanchis-Gual, Pablo Cerd\'a-Dur\'an,
Miguel Zilh\~ao, Carlos Herdeiro, Jos\'e A. Font, Eugen Radu | On the dynamical bar-mode instability in spinning bosonic stars | 16 pages, 11 figures. A longer version of the abstract in the pdf | null | 10.1103/PhysRevD.102.124009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spinning bosonic stars (SBSs) can form from the gravitational collapse of a
dilute cloud of scalar/Proca particles with non-zero angular momentum. In a
recent work we found that the scalar stars are transient due to a
non-axisymmetric instability which triggers the loss of angular momentum. We
further study the dynam... | [
{
"created": "Mon, 12 Oct 2020 16:51:28 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Oct 2020 12:56:14 GMT",
"version": "v2"
}
] | 2020-12-09 | [
[
"Di Giovanni",
"Fabrizio",
""
],
[
"Sanchis-Gual",
"Nicolas",
""
],
[
"Cerdá-Durán",
"Pablo",
""
],
[
"Zilhão",
"Miguel",
""
],
[
"Herdeiro",
"Carlos",
""
],
[
"Font",
"José A.",
""
],
[
"Radu",
"Eugen",
""... | Spinning bosonic stars (SBSs) can form from the gravitational collapse of a dilute cloud of scalar/Proca particles with non-zero angular momentum. In a recent work we found that the scalar stars are transient due to a non-axisymmetric instability which triggers the loss of angular momentum. We further study the dynamic... |
1303.1185 | Neil J. Cornish | Laura Sampson, Neil Cornish and Nicolas Yunes | Gravitational Wave Tests of Strong Field General Relativity with Binary
Inspirals: Realistic Injections and Optimal Model Selection | 12 pages, 8 figures | null | 10.1103/PhysRevD.87.102001 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study generic tests of strong-field General Relativity using gravitational
waves emitted during the inspiral of compact binaries. Previous studies have
considered simple extensions to the standard post-Newtonian waveforms that
differ by a single term in the phase. Here we improve on these studies by (i)
increasing... | [
{
"created": "Tue, 5 Mar 2013 21:00:04 GMT",
"version": "v1"
}
] | 2013-05-22 | [
[
"Sampson",
"Laura",
""
],
[
"Cornish",
"Neil",
""
],
[
"Yunes",
"Nicolas",
""
]
] | We study generic tests of strong-field General Relativity using gravitational waves emitted during the inspiral of compact binaries. Previous studies have considered simple extensions to the standard post-Newtonian waveforms that differ by a single term in the phase. Here we improve on these studies by (i) increasing t... |
1412.1291 | Behnam Pourhassan | J. Sadeghi, H. Farahani, B. Pourhassan | Interacting Holographic Extended Chaplygin Gas and Phantom Cosmology in
the Light of BICEP2 | 15 pages, 3 figures, References added in version 2 | Eur. Phys. J. Plus 130 (2015) 84 | 10.1140/epjp/i2015-15084-6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the holographic dark energy density and interacting
extended Chaplygin gas energy density in the Einstein gravity. We reconstruct
the scalar field and the scalar potential describing the extended Chaplygin
gas. In the special case, we obtain energy density and investigate some
cosmological par... | [
{
"created": "Wed, 3 Dec 2014 12:07:47 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Dec 2014 19:32:45 GMT",
"version": "v2"
}
] | 2015-04-28 | [
[
"Sadeghi",
"J.",
""
],
[
"Farahani",
"H.",
""
],
[
"Pourhassan",
"B.",
""
]
] | In this paper, we study the holographic dark energy density and interacting extended Chaplygin gas energy density in the Einstein gravity. We reconstruct the scalar field and the scalar potential describing the extended Chaplygin gas. In the special case, we obtain energy density and investigate some cosmological param... |
1804.11203 | Luigi Tedesco | Luigi Tedesco | Ellipsoidal Expansion of the Universe, Cosmic Shear, Acceleration and
Jerk Parameter | 13 pages, accepted for publication in European Physical Journal Plus | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to study if the anisotropy of the spacetime may induce differences
in the cosmic shear or in deceleration parameter we investigate in Bianchi I
Universe the most general expression for the cosmic shear and we study the
connections between deceleration parameter and cosmic shear. We also consider a
shear para... | [
{
"created": "Thu, 26 Apr 2018 16:08:44 GMT",
"version": "v1"
}
] | 2018-05-03 | [
[
"Tedesco",
"Luigi",
""
]
] | In order to study if the anisotropy of the spacetime may induce differences in the cosmic shear or in deceleration parameter we investigate in Bianchi I Universe the most general expression for the cosmic shear and we study the connections between deceleration parameter and cosmic shear. We also consider a shear parame... |
gr-qc/0508017 | Nese Ozdemir | N. Ozdemir | Spinning cosmic strings: a general class of solutions | null | Int.J.Mod.Phys. A20 (2005) 2821-2832 | 10.1142/S0217751X05020781 | null | gr-qc | null | In this work, we give a general class of solutions of the spinning cosmic
string in Einstein's theory of gravity. After treating same problem in Einstein
Cartan (EC) theory of gravity, the exact solution satisfying both exterior and
interior space-times representing a spin fluid moving along the symmetry axis
is pres... | [
{
"created": "Thu, 4 Aug 2005 14:20:08 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Ozdemir",
"N.",
""
]
] | In this work, we give a general class of solutions of the spinning cosmic string in Einstein's theory of gravity. After treating same problem in Einstein Cartan (EC) theory of gravity, the exact solution satisfying both exterior and interior space-times representing a spin fluid moving along the symmetry axis is presen... |
2403.02230 | Peter Horvathy | Q.L. Zhao, P. M. Zhang, P.A. Horvathy | Conformally related vacuum gravitational waves, and their symmetries | Reorganized, with some new results. 36 pages, 18 figures | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A special conformal transformation which carries a vacuum gravitational wave
into another vacuum one is built by using M\"obius-redefined time. It can
either transform a globally defined vacuum wave into a vacuum sandwich wave, or
carry the gravitational wave into itself. The first type, illustrated by
linearly and c... | [
{
"created": "Mon, 4 Mar 2024 17:20:55 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Mar 2024 09:00:21 GMT",
"version": "v2"
}
] | 2024-03-13 | [
[
"Zhao",
"Q. L.",
""
],
[
"Zhang",
"P. M.",
""
],
[
"Horvathy",
"P. A.",
""
]
] | A special conformal transformation which carries a vacuum gravitational wave into another vacuum one is built by using M\"obius-redefined time. It can either transform a globally defined vacuum wave into a vacuum sandwich wave, or carry the gravitational wave into itself. The first type, illustrated by linearly and cir... |
gr-qc/0501027 | Jorge Pullin | Rodolfo Gambini, Rafael Porto, Jorge Pullin | Fundamental decoherence in quantum gravity | 6 pages, to appear in the proceedings of DICE 2004 (Piombino, Italy) | Braz.J.Phys. 35 (2005) 266-270 | null | LSU-REL-010905 | gr-qc | null | A recently introduced discrete formalism allows to solve the problem of time
in quantum gravity in a relational manner. Quantum mechanics formulated with a
relational time is not exactly unitary and implies a fundamental mechanism for
decoherence of quantum states. The mechanism is strong enough to render the
black h... | [
{
"created": "Sun, 9 Jan 2005 23:04:30 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Porto",
"Rafael",
""
],
[
"Pullin",
"Jorge",
""
]
] | A recently introduced discrete formalism allows to solve the problem of time in quantum gravity in a relational manner. Quantum mechanics formulated with a relational time is not exactly unitary and implies a fundamental mechanism for decoherence of quantum states. The mechanism is strong enough to render the black hol... |
1008.0991 | Jo\~ao Paulo Pitelli Manoel | Patricio S. Letelier and Jo\~ao Paulo M. Pitelli | Quantum singularities in FRW universe revisited | 15 pages, revtex, accepted for publication in PRD | Phys.Rev.D82:043514,2010 | 10.1103/PhysRevD.82.043514 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The components of the Riemann tensor in the tetrad basis are quantized and,
through the Einstein equation, we find the local expectation value in the
ontological interpretation of quantum mechanics of the energy density and
pressure of a perfect fluid with equation of state $p=\frac{1}{3}\rho$ in the
flat Friedmann-R... | [
{
"created": "Thu, 5 Aug 2010 15:00:14 GMT",
"version": "v1"
}
] | 2010-09-02 | [
[
"Letelier",
"Patricio S.",
""
],
[
"Pitelli",
"João Paulo M.",
""
]
] | The components of the Riemann tensor in the tetrad basis are quantized and, through the Einstein equation, we find the local expectation value in the ontological interpretation of quantum mechanics of the energy density and pressure of a perfect fluid with equation of state $p=\frac{1}{3}\rho$ in the flat Friedmann-Rob... |
1009.3633 | Anastasia Golubtsova | Anastasia Golubtsova | On multidimensional cosmological solutions with scalar fields and
2-forms corresponding to rank-3 Lie algebras: acceleration and small
variation of G | 14 pages, 6 figures | Grav.Cosmol.16:298-306,2010 | 10.1134/S0202289310040079 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By means of a simple model we investigate the possibility of an accelerated
expansion of a 3-dimensional subspace in the presence of the variation of the
effective 4-dimensional constant obeying the experimental constraint.
Multidimensional cosmological solutions with m 2-form fields and l scalar
fields are presented... | [
{
"created": "Sun, 19 Sep 2010 12:27:47 GMT",
"version": "v1"
}
] | 2010-12-15 | [
[
"Golubtsova",
"Anastasia",
""
]
] | By means of a simple model we investigate the possibility of an accelerated expansion of a 3-dimensional subspace in the presence of the variation of the effective 4-dimensional constant obeying the experimental constraint. Multidimensional cosmological solutions with m 2-form fields and l scalar fields are presented. ... |
1108.2410 | Salvatore Vitale | Salvatore Vitale and Michele Zanolin | Application of asymptotic expansions for maximum likelihood estimators'
errors to gravitational waves from binary mergers: the network case | 26 pages, 10 figures | Phys. Rev. D 84 104020 (2011) | 10.1103/PhysRevD.84.104020 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper describes the most accurate analytical frequentist assessment to
date of the uncertainties in the estimation of physical parameters from
gravitational waves generated by non spinning binary systems and Earth-based
networks of laser interferometers. The paper quantifies how the accuracy in
estimating the in... | [
{
"created": "Thu, 11 Aug 2011 14:16:00 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Aug 2011 15:52:25 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Oct 2011 19:27:18 GMT",
"version": "v3"
}
] | 2013-05-29 | [
[
"Vitale",
"Salvatore",
""
],
[
"Zanolin",
"Michele",
""
]
] | This paper describes the most accurate analytical frequentist assessment to date of the uncertainties in the estimation of physical parameters from gravitational waves generated by non spinning binary systems and Earth-based networks of laser interferometers. The paper quantifies how the accuracy in estimating the intr... |
0708.3146 | Sini R | Sini R., V. C. Kuriakose | Absorption cross section of RN black hole | 6 pages, 2 figures | Int.J.Mod.Phys.D18:1-11,2009 | 10.1142/S0218271809014236 | null | gr-qc | null | The behavior of a charged scalar field in the RN black hole space time is
studied using WKB approximation. In the present work it is assumed that matter
waves can get reflected from the event horizon. Using this effect, the Hawking
temperature and the absorption cross section for RN black hole placed in a
charged sca... | [
{
"created": "Thu, 23 Aug 2007 09:00:40 GMT",
"version": "v1"
}
] | 2009-03-24 | [
[
"R.",
"Sini",
""
],
[
"Kuriakose",
"V. C.",
""
]
] | The behavior of a charged scalar field in the RN black hole space time is studied using WKB approximation. In the present work it is assumed that matter waves can get reflected from the event horizon. Using this effect, the Hawking temperature and the absorption cross section for RN black hole placed in a charged scala... |
0807.3537 | Ezra Newman | Tim Adamo, Ezra T Newman | The Gravitational Field of a Radiating Electromagnetic Dipole | 17 | Class.Quant.Grav.25:245005,2008 | 10.1088/0264-9381/25/24/245005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We begin with the time-dependent electric and magnetic dipole solution of
Maxwell's equations in Minkowski space. This Maxwell field is then used to
determine the behavior of the gravitational field (the Weyl tensor) as a
second-order perturbation off of the Minkowski background. From the Weyl tensor
we go on and fin... | [
{
"created": "Tue, 22 Jul 2008 18:51:27 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Adamo",
"Tim",
""
],
[
"Newman",
"Ezra T",
""
]
] | We begin with the time-dependent electric and magnetic dipole solution of Maxwell's equations in Minkowski space. This Maxwell field is then used to determine the behavior of the gravitational field (the Weyl tensor) as a second-order perturbation off of the Minkowski background. From the Weyl tensor we go on and find ... |
1105.2316 | Norman G\"urlebeck | Norman G\"urlebeck | The interior solution of axially symmetric, stationary and rigidly
rotating dust configurations | minor corrections to the published version, 10 pages | Gen. Relativ. Gravit. (2009) 41:2687-2696 | 10.1007/s10714-009-0796-8 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the interior solution of axially symmetric, stationary and
rigidly rotating dust configurations is completely determined by the mass
density along the axis of rotation. The particularly interesting case of a mass
density, which is cylindrical symmetric in the interior of the dust
configuration, is pr... | [
{
"created": "Wed, 11 May 2011 20:39:33 GMT",
"version": "v1"
}
] | 2011-05-13 | [
[
"Gürlebeck",
"Norman",
""
]
] | It is shown that the interior solution of axially symmetric, stationary and rigidly rotating dust configurations is completely determined by the mass density along the axis of rotation. The particularly interesting case of a mass density, which is cylindrical symmetric in the interior of the dust configuration, is pres... |
1802.02281 | Rafael Nunes | Rafael C. Nunes | Structure formation in $f(T)$ gravity and a solution for $H_0$ tension | 18 pages, 8 figures, 1 table. Matches the version published in JCAP | JCAP 05(2018)052 | 10.1088/1475-7516/2018/05/052 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the evolution of scalar perturbations in $f(T)$ teleparallel
gravity and its effects on the cosmic microwave background (CMB) anisotropy.
The $f(T)$ gravity generalizes the teleparallel gravity which is formulated on
the Weitzenb\"ock spacetime, characterized by the vanishing curvature tensor
(absolute... | [
{
"created": "Wed, 7 Feb 2018 01:50:42 GMT",
"version": "v1"
},
{
"created": "Tue, 8 May 2018 16:18:21 GMT",
"version": "v2"
},
{
"created": "Sun, 20 May 2018 14:45:13 GMT",
"version": "v3"
}
] | 2018-05-22 | [
[
"Nunes",
"Rafael C.",
""
]
] | We investigate the evolution of scalar perturbations in $f(T)$ teleparallel gravity and its effects on the cosmic microwave background (CMB) anisotropy. The $f(T)$ gravity generalizes the teleparallel gravity which is formulated on the Weitzenb\"ock spacetime, characterized by the vanishing curvature tensor (absolute p... |
2309.12932 | Chen Wu | Zihan Xi, Chen Wu and Wenjun Guo | Different Regular Black Holes: Geodesic Structures of Test Particles | 23 pages, 13 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | This paper investigates the metric of previously proposed regular black
holes, calculates their effective potentials, and plots the curves of the
effective potentials. By determining the conserved quantities, the dynamical
equations for particles and photons near the black hole are derived. The
analysis encompasses t... | [
{
"created": "Fri, 22 Sep 2023 15:30:57 GMT",
"version": "v1"
}
] | 2023-09-25 | [
[
"Xi",
"Zihan",
""
],
[
"Wu",
"Chen",
""
],
[
"Guo",
"Wenjun",
""
]
] | This paper investigates the metric of previously proposed regular black holes, calculates their effective potentials, and plots the curves of the effective potentials. By determining the conserved quantities, the dynamical equations for particles and photons near the black hole are derived. The analysis encompasses tim... |
gr-qc/0404020 | Holger Then | R. Aurich, F. Steiner and H. Then | Numerical computation of Maass waveforms and an application to cosmology | A version of the paper with high resolution figures is available at
http://www.physik.uni-ulm.de/theo/qc/publications.html | Hyperbolic Geometry and Applications in Quantum Chaos and
Cosmology; LMS 397, Cambridge University Press, 2011, pp. 229--269 | 10.1017/CBO9781139108782.008 | null | gr-qc nlin.CD | null | We compute numerically eigenvalues and eigenfunctions of the Laplacian in a
three-dimensional hyperbolic space. Applying the results to cosmology, we
demonstrate that the methods learned in quantum chaos can be used in other
fields of research.
| [
{
"created": "Tue, 6 Apr 2004 11:53:00 GMT",
"version": "v1"
}
] | 2017-04-27 | [
[
"Aurich",
"R.",
""
],
[
"Steiner",
"F.",
""
],
[
"Then",
"H.",
""
]
] | We compute numerically eigenvalues and eigenfunctions of the Laplacian in a three-dimensional hyperbolic space. Applying the results to cosmology, we demonstrate that the methods learned in quantum chaos can be used in other fields of research. |
gr-qc/9412037 | Warner A. Miller | Arkady Kheyfets and Warner A. Miller | Geometrodynamic Quantization and Time Evolution in Quantum Gravity | 21 pages, 2 figures, revtex using epsf.sty, used uufiles -gz -9 macro | null | null | LA-UR-94-4148 | gr-qc | null | We advance here a new gravity quantization procedure that explicitly utilizes
York's analysis of the geometrodynamic degrees of freedom. This geometrodynamic
procedure of quantization is based on a separation of the true dynamic
variables from the embedding parameters and a distinctly different treatment of
these two... | [
{
"created": "Mon, 12 Dec 1994 20:25:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kheyfets",
"Arkady",
""
],
[
"Miller",
"Warner A.",
""
]
] | We advance here a new gravity quantization procedure that explicitly utilizes York's analysis of the geometrodynamic degrees of freedom. This geometrodynamic procedure of quantization is based on a separation of the true dynamic variables from the embedding parameters and a distinctly different treatment of these two k... |
1911.11448 | Piyabut Burikham | Taum Wuthicharn, Supakchai Ponglertsakul, Piyabut Burikham | Quasinormal Modes of Near-Extremal Black Holes and Black Strings in
Massive Gravity Background | 34 pages, 3 figures, 14 tables, split from arXiv: 2010.05879[gr-qc]
as suggested by referee of EPJC | IJMPD(2021) 2150127 | 10.1142/S0218271821501273 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two numerical methods are used to calculate quasinormal modes (QNMs) of
near-extremal black holes/strings in the generalized spherically/cylindrically
symmetric background, the Asymptotic Iteration Method (AIM) and the Spectral
Method. The numerical results confirm the accuracy of the approximate analytic
formula usi... | [
{
"created": "Tue, 26 Nov 2019 10:48:10 GMT",
"version": "v1"
},
{
"created": "Fri, 14 May 2021 08:12:58 GMT",
"version": "v2"
},
{
"created": "Mon, 17 May 2021 13:58:27 GMT",
"version": "v3"
},
{
"created": "Tue, 8 Feb 2022 14:03:23 GMT",
"version": "v4"
}
] | 2022-02-09 | [
[
"Wuthicharn",
"Taum",
""
],
[
"Ponglertsakul",
"Supakchai",
""
],
[
"Burikham",
"Piyabut",
""
]
] | Two numerical methods are used to calculate quasinormal modes (QNMs) of near-extremal black holes/strings in the generalized spherically/cylindrically symmetric background, the Asymptotic Iteration Method (AIM) and the Spectral Method. The numerical results confirm the accuracy of the approximate analytic formula using... |
2208.06408 | Giovanni Maria Tomaselli | Lam Hui, Y.T. Albert Law, Luca Santoni, Guanhao Sun, Giovanni Maria
Tomaselli, Enrico Trincherini | Black hole superradiance with (dark) matter accretion | 30+21 pages, 14 figures | null | 10.1103/PhysRevD.107.104018 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Studies of black hole superradiance often focus on the growth of a cloud in
isolation, accompanied by the spin-down of the black hole. In this paper, we
consider the additional effect of the accretion of matter and angular momentum
from the environment. We show that, in many cases, the black hole evolves by
drifting ... | [
{
"created": "Fri, 12 Aug 2022 17:59:58 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Jan 2023 15:28:44 GMT",
"version": "v2"
},
{
"created": "Thu, 25 May 2023 15:21:56 GMT",
"version": "v3"
}
] | 2023-05-26 | [
[
"Hui",
"Lam",
""
],
[
"Law",
"Y. T. Albert",
""
],
[
"Santoni",
"Luca",
""
],
[
"Sun",
"Guanhao",
""
],
[
"Tomaselli",
"Giovanni Maria",
""
],
[
"Trincherini",
"Enrico",
""
]
] | Studies of black hole superradiance often focus on the growth of a cloud in isolation, accompanied by the spin-down of the black hole. In this paper, we consider the additional effect of the accretion of matter and angular momentum from the environment. We show that, in many cases, the black hole evolves by drifting al... |
1604.03263 | Piero Nicolini | Antonia M. Frassino, Sven K\"oppel and Piero Nicolini | Geometric model of black hole quantum $N$-portrait, extradimensions and
thermodynamics | 36 pages, 8 figures, invited paper to the special issue "Entropy in
Quantum Gravity and Quantum Cosmology" edited by R. Garattini for the journal
"Entropy", accepted for publication; v2 version matching that published on
the journal | Entropy 2016, 18(5), 181 | 10.3390/e18050181 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently a short scale modified black hole metric, known as holographic
metric, has been proposed in order to capture the self-complete character of
gravity. In this paper we show that such a metric can reproduce some geometric
features expected from the quantum $N$-portrait beyond the semi-classical
limit. We show t... | [
{
"created": "Tue, 12 Apr 2016 07:06:18 GMT",
"version": "v1"
},
{
"created": "Thu, 19 May 2016 21:34:50 GMT",
"version": "v2"
}
] | 2016-05-23 | [
[
"Frassino",
"Antonia M.",
""
],
[
"Köppel",
"Sven",
""
],
[
"Nicolini",
"Piero",
""
]
] | Recently a short scale modified black hole metric, known as holographic metric, has been proposed in order to capture the self-complete character of gravity. In this paper we show that such a metric can reproduce some geometric features expected from the quantum $N$-portrait beyond the semi-classical limit. We show tha... |
gr-qc/0306073 | Kayll Lake | Kayll Lake | An explicit global covering of the Schwarzschild-Tangherlini black holes | 3 pages revtex4, Updated references | JCAP 0310 (2003) 007 | 10.1088/1475-7516/2003/10/007 | null | gr-qc hep-th | null | Explicit regular coordinates that cover all of the Tangherlini solutions
(Schwarzschild black holes of dimension $D>4$) are given. The coordinates
reduce to Israel coordinates for D=4.
| [
{
"created": "Mon, 16 Jun 2003 18:51:01 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Jun 2003 18:31:22 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Lake",
"Kayll",
""
]
] | Explicit regular coordinates that cover all of the Tangherlini solutions (Schwarzschild black holes of dimension $D>4$) are given. The coordinates reduce to Israel coordinates for D=4. |
2209.02727 | Marcello Miranda | Marcello Miranda, Daniele Vernieri, Salvatore Capozziello, Valerio
Faraoni | Fluid nature constrains Horndeski gravity | 28 pages, 2 tables. Matches published version in General Relativity
and Gravitation | Gen.Rel.Grav. 55 (2023) 7, 84 | 10.1007/s10714-023-03128-1 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The elusive physical nature of Horndeski gravity is elucidated in a new
approach depicting this class of theories as a dissipative effective fluid.
Requiring the constitutive equations of the latter to be those of a Newtonian
fluid restricts the theory to only two disconnected subclasses of "viable"
Horndeski gravity... | [
{
"created": "Tue, 6 Sep 2022 18:00:05 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jul 2023 10:17:47 GMT",
"version": "v2"
}
] | 2023-07-14 | [
[
"Miranda",
"Marcello",
""
],
[
"Vernieri",
"Daniele",
""
],
[
"Capozziello",
"Salvatore",
""
],
[
"Faraoni",
"Valerio",
""
]
] | The elusive physical nature of Horndeski gravity is elucidated in a new approach depicting this class of theories as a dissipative effective fluid. Requiring the constitutive equations of the latter to be those of a Newtonian fluid restricts the theory to only two disconnected subclasses of "viable" Horndeski gravity. ... |
gr-qc/9606013 | Roumen Borissov | Roumen Borissov | Graphical Evolution of Spin Network States | 24 pages, 21 PostScript figures, uses epsfig.sty, Minor corrections
in the final formula in the main body of the paper and in the formula for the
Tetrahedral net in the Appendix | Phys.Rev. D55 (1997) 6099-6111 | 10.1103/PhysRevD.55.6099 | TU-96/6-1 | gr-qc hep-th | null | The evolution of spin network states in loop quantum gravity can be described
by introducing a time variable, defined by the surfaces of constant value of an
auxiliary scalar field. We regulate the Hamiltonian, generating such an
evolution, and evaluate its action both on edges and on vertices of the spin
network sta... | [
{
"created": "Fri, 7 Jun 1996 17:18:41 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jun 1996 18:49:14 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Mar 1997 20:20:09 GMT",
"version": "v3"
}
] | 2009-10-28 | [
[
"Borissov",
"Roumen",
""
]
] | The evolution of spin network states in loop quantum gravity can be described by introducing a time variable, defined by the surfaces of constant value of an auxiliary scalar field. We regulate the Hamiltonian, generating such an evolution, and evaluate its action both on edges and on vertices of the spin network state... |
1402.6592 | Jose M Munoz-Castaneda | J. M. Munoz-Castaneda and M. Bordag | Quantum vacuum interaction between two cosmic strings revisited | Submitted to Phys Rev D | Phys. Rev. D 89, 065034 (2014) | 10.1103/PhysRevD.89.065034 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reconsider the quantum vacuum interaction energy between two straight
parallel cosmic strings. This problem was discussed several times in an
approach treating both strings perturbatively and treating only one
perturbatively. Here we point out that a simplifying assumption made in [1] can
be justified and show tha... | [
{
"created": "Wed, 26 Feb 2014 16:23:51 GMT",
"version": "v1"
}
] | 2015-06-18 | [
[
"Munoz-Castaneda",
"J. M.",
""
],
[
"Bordag",
"M.",
""
]
] | We reconsider the quantum vacuum interaction energy between two straight parallel cosmic strings. This problem was discussed several times in an approach treating both strings perturbatively and treating only one perturbatively. Here we point out that a simplifying assumption made in [1] can be justified and show that,... |
1504.00846 | Hayato Motohashi | Hayato Motohashi, Jonathan White | Disformal invariance of curvature perturbation | 15 pages; Improved Sec. IV, added Appendix B and discussion on the
invertibility of the disformal transformation in Sec. II; Improved discussion
in Secs. II and IV, matches published version in JCAP | JCAP 1602 (2016) 02, 065 | 10.1088/1475-7516/2016/02/065 | RESCEU-8/15, KEK-TH-1802 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that under a general disformal transformation the linear comoving
curvature perturbation is not identically invariant, but is invariant on
superhorizon scales for any theory that is disformally related to Horndeski's
theory. The difference between disformally related curvature perturbations is
found to be giv... | [
{
"created": "Thu, 2 Apr 2015 18:08:21 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Aug 2015 05:06:10 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Feb 2016 23:00:36 GMT",
"version": "v3"
}
] | 2016-03-11 | [
[
"Motohashi",
"Hayato",
""
],
[
"White",
"Jonathan",
""
]
] | We show that under a general disformal transformation the linear comoving curvature perturbation is not identically invariant, but is invariant on superhorizon scales for any theory that is disformally related to Horndeski's theory. The difference between disformally related curvature perturbations is found to be given... |
gr-qc/9907040 | Dominic Clancy | James E. Lidsey, Carlos Romero, Reza Tavakol and Steve Rippl | On Applications of Campbell's Embedding Theorem | 17 pages, standard Latex source | Class.Quant.Grav.14:865-879,1997 | 10.1088/0264-9381/14/4/005 | null | gr-qc | null | A little known theorem due to Campbell is employed to establish the local
embedding of a wide class of 4-dimensional spacetimes in 5-dimensional
Ricci-flat spaces. An embedding for the class of n-dimensional Einstein spaces
is also found. The local nature of Campbell's theorem is highlighted by
studying the embedding... | [
{
"created": "Fri, 9 Jul 1999 14:21:39 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Lidsey",
"James E.",
""
],
[
"Romero",
"Carlos",
""
],
[
"Tavakol",
"Reza",
""
],
[
"Rippl",
"Steve",
""
]
] | A little known theorem due to Campbell is employed to establish the local embedding of a wide class of 4-dimensional spacetimes in 5-dimensional Ricci-flat spaces. An embedding for the class of n-dimensional Einstein spaces is also found. The local nature of Campbell's theorem is highlighted by studying the embedding o... |
1808.05522 | Yuri Bonder | Yuri Bonder and Crist\'obal Corral | Is there any symmetry left in gravity theories with explicit Lorentz
violation? | For a special issue of the journal Symmetry on Broken Symmetry in
Curved Spacetime and Gravity. 8 pages | Symmetry 2018, 10(10), 433 | 10.3390/sym10100433 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that a theory with explicit Lorentz violation is not
invariant under diffeomorphisms. On the other hand, for geometrical theories of
gravity, there are alternative transformations, which can be best defined
within the first-order formalism, and that can be regarded as a set of improved
diffeomorphism... | [
{
"created": "Thu, 16 Aug 2018 14:47:53 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Sep 2018 03:25:46 GMT",
"version": "v2"
}
] | 2018-10-10 | [
[
"Bonder",
"Yuri",
""
],
[
"Corral",
"Cristóbal",
""
]
] | It is well known that a theory with explicit Lorentz violation is not invariant under diffeomorphisms. On the other hand, for geometrical theories of gravity, there are alternative transformations, which can be best defined within the first-order formalism, and that can be regarded as a set of improved diffeomorphisms.... |
gr-qc/0408077 | Richard Price | Richard H. Price and Lior M. Burko | Late time tails from momentarily stationary, compact initial data in
Schwarzschild spacetimes | 7 pages, 5 figures | Phys.Rev. D70 (2004) 084039 | 10.1103/PhysRevD.70.084039 | null | gr-qc | null | An L-pole perturbation in Schwarzschild spacetime generally falls off at late
times t as t^{-2L-3}. It has recently been pointed out by Karkowski,
Swierczynski and Malec, that for initial data that is of compact support, and
is initially momentarily static, the late-time behavior is different, going as
t^{-2L-4}. By ... | [
{
"created": "Mon, 23 Aug 2004 15:13:23 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Price",
"Richard H.",
""
],
[
"Burko",
"Lior M.",
""
]
] | An L-pole perturbation in Schwarzschild spacetime generally falls off at late times t as t^{-2L-3}. It has recently been pointed out by Karkowski, Swierczynski and Malec, that for initial data that is of compact support, and is initially momentarily static, the late-time behavior is different, going as t^{-2L-4}. By co... |
gr-qc/0609099 | Petarpa Boonserm | Petarpa Boonserm (Victoria University of Wellington), Matt Visser
(Victoria University of Wellington), and Silke Weinfurtner (Victoria
University of Wellington) | Solution generating theorems: perfect fluid spheres and the TOV equation | 3 pages, 0 figures, to appear in the proceedings of the Eleventh
Marcel Grossmann Meeting on General Relativity (MG11), 23 - 29 July, 2006,
Berlin, Germany | null | null | null | gr-qc | null | We report several new transformation theorems that map perfect fluid spheres
into perfect fluid spheres. In addition, we report new ``solution generating''
theorems for the TOV, whereby any given solution can be ``deformed'' to a new
solution.
| [
{
"created": "Fri, 22 Sep 2006 02:51:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Boonserm",
"Petarpa",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
],
[
"Weinfurtner",
"Silke",
"",
"Victoria\n University of Wellington"
]
] | We report several new transformation theorems that map perfect fluid spheres into perfect fluid spheres. In addition, we report new ``solution generating'' theorems for the TOV, whereby any given solution can be ``deformed'' to a new solution. |
1702.05786 | Waleed El Hanafy | W. El Hanafy and G.G.L. Nashed | Generic Phase Portrait Analysis of the Finite-time Singularities and
Generalized Teleparallel Gravity | To be published in Chinese Physics C (Accepted version) | Chinese Physics C Vol. 41, No. 12 (2017) 125103 | 10.1088/1674-1137/41/12/125103 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the common four types of the finite-time singularities using a
generic framework of the phase portrait geometric approach. This technique
requires that the Friedmann system to be written as a one dimensional
autonomous system. We employ a scale factor that has been used widely in
literature to realize the ... | [
{
"created": "Sun, 19 Feb 2017 19:23:50 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Oct 2017 17:39:42 GMT",
"version": "v2"
}
] | 2017-11-07 | [
[
"Hanafy",
"W. El",
""
],
[
"Nashed",
"G. G. L.",
""
]
] | We analyze the common four types of the finite-time singularities using a generic framework of the phase portrait geometric approach. This technique requires that the Friedmann system to be written as a one dimensional autonomous system. We employ a scale factor that has been used widely in literature to realize the fo... |
1008.1958 | Mauricio Bellini | Mauricio Bellini (IFIMAR, CONICET & Mar del Plata University) | Fierz-Pauli equation for massive gravitons from Induced Matter theory of
gravity | 9 pages, no figures, version accepted in Phys. Lett. B | Phys.Lett.B696:183-185,2011 | 10.1016/j.physletb.2010.12.054 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting with a 5D physical vacuum described by a 5D Ricci-flat background
metric, we study the emergence of gravitational waves (GW) from the Induce
Matter (IM) theory of gravity. We obtain the equation of motion for GW on an 4D
curved spacetime which has the form of a Fierz-Pauli one. In our model the mass
of gravi... | [
{
"created": "Wed, 11 Aug 2010 17:39:54 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Sep 2010 18:41:13 GMT",
"version": "v2"
},
{
"created": "Fri, 19 Nov 2010 11:18:09 GMT",
"version": "v3"
},
{
"created": "Tue, 28 Dec 2010 11:14:38 GMT",
"version": "v4"
}
] | 2011-01-17 | [
[
"Bellini",
"Mauricio",
"",
"IFIMAR, CONICET & Mar del Plata University"
]
] | Starting with a 5D physical vacuum described by a 5D Ricci-flat background metric, we study the emergence of gravitational waves (GW) from the Induce Matter (IM) theory of gravity. We obtain the equation of motion for GW on an 4D curved spacetime which has the form of a Fierz-Pauli one. In our model the mass of gravito... |
0904.4418 | Bernd Bruegmann | Bernd Bruegmann | Schwarzschild black hole as moving puncture in isotropic coordinates | 11 pages, 5 figures, pdflatex | Gen.Rel.Grav.41:2131-2151,2009 | 10.1007/s10714-009-0818-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The success of the moving puncture method for the numerical simulation of
black hole systems can be partially explained by the properties of stationary
solutions of the 1+log coordinate condition. We compute stationary 1+log slices
of the Schwarzschild spacetime in isotropic coordinates in order to investigate
the co... | [
{
"created": "Tue, 28 Apr 2009 14:56:46 GMT",
"version": "v1"
}
] | 2010-03-26 | [
[
"Bruegmann",
"Bernd",
""
]
] | The success of the moving puncture method for the numerical simulation of black hole systems can be partially explained by the properties of stationary solutions of the 1+log coordinate condition. We compute stationary 1+log slices of the Schwarzschild spacetime in isotropic coordinates in order to investigate the coor... |
gr-qc/0512069 | Daniele Oriti | Daniele Oriti | Generalised group field theories and quantum gravity transition
amplitudes | RevTeX; 6 pages, 2 figures | Phys.Rev. D73 (2006) 061502 | 10.1103/PhysRevD.73.061502 | DAMTP-2005-127 | gr-qc | null | We construct a generalised formalism for group field theories, in which the
domain of the field is extended to include additional proper time variables, as
well as their conjugate mass variables. This formalism allows for different
types of quantum gravity transition amplitudes in perturbative expansion, and
we show ... | [
{
"created": "Mon, 12 Dec 2005 17:23:35 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Oriti",
"Daniele",
""
]
] | We construct a generalised formalism for group field theories, in which the domain of the field is extended to include additional proper time variables, as well as their conjugate mass variables. This formalism allows for different types of quantum gravity transition amplitudes in perturbative expansion, and we show ho... |
1604.02328 | Sercan Cikintoglu | Sava\c{s} Arapo\u{g}lu, Sercan \c{C}{\i}k{\i}nto\u{g}lu, K. Yavuz
Ek\c{s}i | Relativistic stars in Starobinsky gravity with the matched asymptotic
expansions method | 10 pages, 3 figures, matches the published version in PRD | Phys. Rev. D 96, 084040 (2017) | 10.1103/PhysRevD.96.084040 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the structure of relativistic stars in $\mathcal{R}+\alpha
\mathcal{R}^{2}$ theory using the method of matched asymptotic expansion to
handle the higher order derivatives in field equations arising from the higher
order curvature term. We find solutions, parametrized by $\alpha$, for uniform
density stars. W... | [
{
"created": "Thu, 7 Apr 2016 08:18:39 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Apr 2016 13:41:46 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Apr 2016 13:59:01 GMT",
"version": "v3"
},
{
"created": "Mon, 18 Sep 2017 14:30:01 GMT",
"version": "v4"
},
{
"cr... | 2017-10-24 | [
[
"Arapoğlu",
"Savaş",
""
],
[
"Çıkıntoğlu",
"Sercan",
""
],
[
"Ekşi",
"K. Yavuz",
""
]
] | We study the structure of relativistic stars in $\mathcal{R}+\alpha \mathcal{R}^{2}$ theory using the method of matched asymptotic expansion to handle the higher order derivatives in field equations arising from the higher order curvature term. We find solutions, parametrized by $\alpha$, for uniform density stars. We ... |
2101.08261 | V. G. Gurzadyan | A. Stepanian, Sh. Khlghatyan, V.G. Gurzadyan | Black hole shadow to probe modified gravity | 7 pages, Eur. Phys. J. Plus (in press) | Eur. Phys. J. Plus 136, 127 (2021) | 10.1140/epjp/s13360-021-01119-2 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We study the black hole's shadow for Schwarzschild - de Sitter and Kerr - de
Sitter metrics with the contribution of the cosmological constant \Lambda.
Based on the reported parameters of the M87* black hole shadow we obtain
constraints for the $\Lambda$ and show the agreement with the cosmological
data. It is shown ... | [
{
"created": "Wed, 20 Jan 2021 03:17:17 GMT",
"version": "v1"
}
] | 2021-01-29 | [
[
"Stepanian",
"A.",
""
],
[
"Khlghatyan",
"Sh.",
""
],
[
"Gurzadyan",
"V. G.",
""
]
] | We study the black hole's shadow for Schwarzschild - de Sitter and Kerr - de Sitter metrics with the contribution of the cosmological constant \Lambda. Based on the reported parameters of the M87* black hole shadow we obtain constraints for the $\Lambda$ and show the agreement with the cosmological data. It is shown th... |
gr-qc/9812074 | Sergei N. Vergeles | S.N. Vergeles (The Landau Institute for Theoretical Physics, Russian
Academy of Sciences.) | The anomaly-free quantization of two-dimensional relativistic string. I | LaTeX, 19 pages, no figures | J.Exp.Theor.Phys. 86 (1998) 854-859; Zh.Eksp.Teor.Fiz. 113 (1998)
1566-1578 | 10.1134/1.558556 | null | gr-qc | null | An anomaly-free quantum theory of a relativistic string is constructed in
two-dimensional space-time. The states of the string are found to be similar to
the states of a massless chiral quantum particle. This result is obtained by
generalizing the concept of an ``operator'' in quantum field theory.
| [
{
"created": "Mon, 21 Dec 1998 09:48:37 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Vergeles",
"S. N.",
"",
"The Landau Institute for Theoretical Physics, Russian\n Academy of Sciences."
]
] | An anomaly-free quantum theory of a relativistic string is constructed in two-dimensional space-time. The states of the string are found to be similar to the states of a massless chiral quantum particle. This result is obtained by generalizing the concept of an ``operator'' in quantum field theory. |
2108.10633 | Theo Verwimp | Theo Verwimp | On higher dimensional gravity: the Lagrangian, its dimensional reduction
and a cosmological model | 11 pages, a typo in equation (3.17) of the original publication has
been corrected | Class. Quantum Grav. 6 (1989) 1655-1663 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By dimensional reduction of the Lovelock Lagrangian, effective
four-dimensional field equations and expressions for the cosmological and
gravitational constants are obtained. A cosmological model is discussed with
the n-torus as internal space.
| [
{
"created": "Tue, 24 Aug 2021 10:31:51 GMT",
"version": "v1"
}
] | 2021-08-25 | [
[
"Verwimp",
"Theo",
""
]
] | By dimensional reduction of the Lovelock Lagrangian, effective four-dimensional field equations and expressions for the cosmological and gravitational constants are obtained. A cosmological model is discussed with the n-torus as internal space. |
2204.02026 | Pankaj Sheoran | Sanjar Shaymatov, Pankaj Sheoran, Ricardo Becerril, Ulises Nucamendi,
Bobomurat Ahmedov | Efficiency of Penrose process in spacetime of axially symmetric
magnetized Reissner-Nordstr\"{o}m black hole | 10 pages, 6 captioned figures. Updated to match with the PRD version | Phys. Rev. D 106, 024039 (2022) | 10.1103/PhysRevD.106.024039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the Penrose process in the purlieus of the
axially symmetric magnetized Reissner-Nordstr\"{o}m black hole for both neutral
and charged particles. We start with the study of the geometry of the black
hole and find the regions where the $g_{tt}$ component of the metric tensor is
positive (... | [
{
"created": "Tue, 5 Apr 2022 07:05:02 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jul 2022 10:05:10 GMT",
"version": "v2"
}
] | 2022-07-26 | [
[
"Shaymatov",
"Sanjar",
""
],
[
"Sheoran",
"Pankaj",
""
],
[
"Becerril",
"Ricardo",
""
],
[
"Nucamendi",
"Ulises",
""
],
[
"Ahmedov",
"Bobomurat",
""
]
] | In this paper, we investigate the Penrose process in the purlieus of the axially symmetric magnetized Reissner-Nordstr\"{o}m black hole for both neutral and charged particles. We start with the study of the geometry of the black hole and find the regions where the $g_{tt}$ component of the metric tensor is positive (i.... |
gr-qc/0603026 | Roberto Casadio | R. Casadio, F. Finelli, A. Kamenshchik, M. Luzzi, G. Venturi | Method of comparison equations for cosmological perturbations | 20 pages, 10 figures | JCAP0604:011,2006 | 10.1088/1475-7516/2006/04/011 | null | gr-qc astro-ph hep-th | null | We apply the method of comparison equations to study cosmological
perturbations during inflation, obtaining the full power spectra of scalar and
tensor perturbations to first and to second order in the slow-roll parameters.
We compare our results with those derived by means of other methods, in
particular the Green's... | [
{
"created": "Wed, 8 Mar 2006 15:40:02 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Casadio",
"R.",
""
],
[
"Finelli",
"F.",
""
],
[
"Kamenshchik",
"A.",
""
],
[
"Luzzi",
"M.",
""
],
[
"Venturi",
"G.",
""
]
] | We apply the method of comparison equations to study cosmological perturbations during inflation, obtaining the full power spectra of scalar and tensor perturbations to first and to second order in the slow-roll parameters. We compare our results with those derived by means of other methods, in particular the Green's f... |
1810.07671 | Noah Graham | Noah Graham | Schwarzschild Quantum Fluctuations from Regge-Wheeler Scattering | 12 pages, 4 .eps figures; v2: fixed typos, added example calculation;
v3: fixed typo (correct sign in Eq. A7); v4: fixed typo (missing factor in
Eq. 28), added clarification of techniques for numerical calculation | Phys. Rev. D 99, 025005 (2019) | 10.1103/PhysRevD.99.025005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply a multichannel variable phase method to scattering from
Regge-Wheeler potentials. Using a reduced version of the WKB subtraction
developed by Candelas and Howard, this approach allows for efficient numerical
calculations of scattering data for imaginary wave number, making it possible
to compute quantum expe... | [
{
"created": "Wed, 17 Oct 2018 17:07:31 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Jan 2019 13:37:28 GMT",
"version": "v2"
},
{
"created": "Wed, 26 Jul 2023 14:53:24 GMT",
"version": "v3"
},
{
"created": "Tue, 8 Aug 2023 20:18:39 GMT",
"version": "v4"
}
] | 2023-08-10 | [
[
"Graham",
"Noah",
""
]
] | We apply a multichannel variable phase method to scattering from Regge-Wheeler potentials. Using a reduced version of the WKB subtraction developed by Candelas and Howard, this approach allows for efficient numerical calculations of scattering data for imaginary wave number, making it possible to compute quantum expect... |
2002.12526 | Todd Oliynyk | Todd A. Oliynyk | Future global stability for relativistic perfect fluids with linear
equations of state $p=K\rho$ where $1/3<K<1/2$ | Comments typos corrected; agrees with the published version | SIAM J. Math. Anal. 53 (2021), 4118-4141 | 10.1137/20M1361195 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish the future stability of nonlinear perturbations of a class of
homogeneous solutions to the relativistic Euler equations with a linear
equation of state $p=K\rho$ on exponentially expanding FLRW spacetimes for the
equation of state parameter values $1/3 < K < 1/2$.
| [
{
"created": "Fri, 28 Feb 2020 03:36:08 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Aug 2020 11:18:07 GMT",
"version": "v2"
},
{
"created": "Mon, 31 May 2021 05:46:37 GMT",
"version": "v3"
}
] | 2021-07-28 | [
[
"Oliynyk",
"Todd A.",
""
]
] | We establish the future stability of nonlinear perturbations of a class of homogeneous solutions to the relativistic Euler equations with a linear equation of state $p=K\rho$ on exponentially expanding FLRW spacetimes for the equation of state parameter values $1/3 < K < 1/2$. |
1311.6697 | S Habib Mazharimousavi | S. Habib Mazharimousavi and M. Halilsoy | Thin-shell wormholes supported by total normal matter | 5 pages, 5 figures, final version published in EPJC | Eur. Phys. J. C (2014) 74:3067 | 10.1140/epjc/s10052-014-3067-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Zipoy-Voorhees-Weyl (ZVW) spacetime characterized by mass ($M$) and
oblateness ($\delta $) is proposed in the construction of viable thin-shell
wormholes (TSWs). Departure from spherical / cylindrical symmetry yields
positive total energy in spite of the fact that local energy density may take
negative values. We... | [
{
"created": "Mon, 25 Nov 2013 12:04:52 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Mar 2014 16:22:39 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Sep 2014 05:48:06 GMT",
"version": "v3"
}
] | 2014-09-30 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
]
] | The Zipoy-Voorhees-Weyl (ZVW) spacetime characterized by mass ($M$) and oblateness ($\delta $) is proposed in the construction of viable thin-shell wormholes (TSWs). Departure from spherical / cylindrical symmetry yields positive total energy in spite of the fact that local energy density may take negative values. We s... |
gr-qc/9511016 | Steve F. Rippl | Steve Rippl, Carlos Romero and Reza Tavakol | $D$-Dimensional Gravity from $(D+1)$ Dimensions | 11 pages, latex, published in CQG vol. 12 no. 10 | Class.Quant.Grav. 12 (1995) 2411-2422 | 10.1088/0264-9381/12/10/004 | null | gr-qc | null | We generalise Wesson's procedure, whereby vacuum $(4+1)-$dimensional field
equations give rise to $(3+1)-$dimensional equations with sources, to arbitrary
dimensions. We then employ this generalisation to relate the usual
$(3+1)-$dimensional vacuum field equations to $(2+1)-$dimensional field
equations with sources a... | [
{
"created": "Fri, 3 Nov 1995 14:08:16 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Rippl",
"Steve",
""
],
[
"Romero",
"Carlos",
""
],
[
"Tavakol",
"Reza",
""
]
] | We generalise Wesson's procedure, whereby vacuum $(4+1)-$dimensional field equations give rise to $(3+1)-$dimensional equations with sources, to arbitrary dimensions. We then employ this generalisation to relate the usual $(3+1)-$dimensional vacuum field equations to $(2+1)-$dimensional field equations with sources and... |
2304.00940 | Syed Masood A. S. Bukhari | Syed Masood A. S. Bukhari, Behnam Pourhassan, Houcine Aounallah,
Li-Gang Wang | On the microstructure of higher-dimensional Reissner-Nordstr\"om black
holes in quantum regime | 22 pages, 14 figures | Class.Quant.Grav. 40 (2023) 22, 225007 | 10.1088/1361-6382/acffa0 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Thermodynamic Riemannian geometry provides great insights into the
microscopic structure of black holes (BHs). One such example is the Ruppeiner
geometry which is the metric space comprising the second derivatives of entropy
with respect to other extensive variables of the system. Reissner-Nordstr\"om
black holes (RN... | [
{
"created": "Mon, 3 Apr 2023 12:54:16 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Apr 2023 15:40:37 GMT",
"version": "v2"
},
{
"created": "Sat, 8 Jul 2023 04:20:04 GMT",
"version": "v3"
}
] | 2023-12-15 | [
[
"Bukhari",
"Syed Masood A. S.",
""
],
[
"Pourhassan",
"Behnam",
""
],
[
"Aounallah",
"Houcine",
""
],
[
"Wang",
"Li-Gang",
""
]
] | Thermodynamic Riemannian geometry provides great insights into the microscopic structure of black holes (BHs). One such example is the Ruppeiner geometry which is the metric space comprising the second derivatives of entropy with respect to other extensive variables of the system. Reissner-Nordstr\"om black holes (RNBH... |
gr-qc/0303056 | Norbert Van den Bergh | Norbert Van den Bergh | Tidal effects cannot be absent in a vacuum | 4 pages, typos corrected | Class.Quant.Grav. 20 (2003) L165-L168 | 10.1088/0264-9381/20/11/103 | null | gr-qc | null | It is shown that there are no vacuum space-times (with or without
cosmological constant) for which the Weyl-tensor is purely gravito-magnetic
with respect to a congruence of freely falling observers.
| [
{
"created": "Fri, 14 Mar 2003 15:22:54 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Mar 2003 10:54:47 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Bergh",
"Norbert Van den",
""
]
] | It is shown that there are no vacuum space-times (with or without cosmological constant) for which the Weyl-tensor is purely gravito-magnetic with respect to a congruence of freely falling observers. |
2106.12542 | J\'unior Diniz Toniato | J\'unior D. Toniato and Davi C. Rodrigues | Post-Newtonian $\gamma$-like parameters and the gravitational slip in
scalar-tensor and $f(R)$ theories | 16 pages, published version in PRD | Phys. Rev. D 104, 044020 (2021) | 10.1103/PhysRevD.104.044020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the fundamentals and highlight the differences between some
commonly used definitions for the PPN gamma parameter ($\gamma$) and the
gravitational slip ($\eta$). Here we stress the usefulness of a gamma-like
parameter used by Berry and Gair ($\gamma_{\scriptscriptstyle \Sigma}$) that
parametrizes the bendin... | [
{
"created": "Tue, 22 Jun 2021 13:08:13 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Jul 2021 16:42:15 GMT",
"version": "v2"
},
{
"created": "Mon, 9 Aug 2021 16:28:38 GMT",
"version": "v3"
}
] | 2021-08-10 | [
[
"Toniato",
"Júnior D.",
""
],
[
"Rodrigues",
"Davi C.",
""
]
] | We review the fundamentals and highlight the differences between some commonly used definitions for the PPN gamma parameter ($\gamma$) and the gravitational slip ($\eta$). Here we stress the usefulness of a gamma-like parameter used by Berry and Gair ($\gamma_{\scriptscriptstyle \Sigma}$) that parametrizes the bending ... |
gr-qc/9506046 | null | Giampiero Esposito | The Impact of Quantum Cosmology on Quantum Field Theory | 14 pages, plain TEX, to appear in Proceedings of the Moscow Quantum
Gravity Seminar, Moscow, June 12 - June 19, 1995 | null | null | DSF preprint 95/27 | gr-qc | null | The basic problem of quantum cosmology is the definition of the quantum state
of the universe, with appropriate boundary conditions on Riemannian
three-geometries. This paper describes recent progress in the corresponding
analysis of quantum amplitudes for Euclidean Maxwell theory and linearized
gravity. Within the f... | [
{
"created": "Thu, 22 Jun 1995 14:56:07 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Esposito",
"Giampiero",
""
]
] | The basic problem of quantum cosmology is the definition of the quantum state of the universe, with appropriate boundary conditions on Riemannian three-geometries. This paper describes recent progress in the corresponding analysis of quantum amplitudes for Euclidean Maxwell theory and linearized gravity. Within the fra... |
2309.06897 | Mikhail Smolyakov | Vadim Egorov, Mikhail Smolyakov, Igor Volobuev | Quantization of spinor field in the Schwarzschild spacetime and spin
sums for solutions of the Dirac equation | 20 pages, 2 figures. v2: minor revision of the text, figure added,
references added | Class. Quantum Grav. 41, 045002 (2024) | 10.1088/1361-6382/ad1b8f | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the problem of canonical quantization of a free massive spinor
field in the Schwarzschild spacetime. It is shown that a consistent procedure
of canonical quantization of the field can be carried out without taking into
account the internal region of the black hole, the canonical commutation
relations in th... | [
{
"created": "Wed, 13 Sep 2023 11:45:50 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Jan 2024 13:13:01 GMT",
"version": "v2"
}
] | 2024-01-23 | [
[
"Egorov",
"Vadim",
""
],
[
"Smolyakov",
"Mikhail",
""
],
[
"Volobuev",
"Igor",
""
]
] | We discuss the problem of canonical quantization of a free massive spinor field in the Schwarzschild spacetime. It is shown that a consistent procedure of canonical quantization of the field can be carried out without taking into account the internal region of the black hole, the canonical commutation relations in the ... |
0712.1030 | Richard Umstaetter | R. Umstaetter, M. Tinto | Bayesian comparison of Post-Newtonian approximations of gravitational
wave chirp signals | 37 pages, 9 figures | Phys.Rev.D77:082002,2008 | 10.1103/PhysRevD.77.082002 | null | gr-qc | null | We estimate the probability of detecting a gravitational wave signal from
coalescing compact binaries in simulated data from a ground-based
interferometer detector of gravitational radiation using Bayesian model
selection. The simulated waveform of the chirp signal is assumed to be a
spin-less Post-Newtonian (PN) wav... | [
{
"created": "Thu, 6 Dec 2007 20:10:47 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Dec 2007 19:55:20 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Dec 2007 19:00:53 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Umstaetter",
"R.",
""
],
[
"Tinto",
"M.",
""
]
] | We estimate the probability of detecting a gravitational wave signal from coalescing compact binaries in simulated data from a ground-based interferometer detector of gravitational radiation using Bayesian model selection. The simulated waveform of the chirp signal is assumed to be a spin-less Post-Newtonian (PN) wavef... |
1406.5111 | Eric Poisson | Peter Zimmerman and Eric Poisson | Gravitational self-force in nonvacuum spacetimes | 20 pages, no figures | null | 10.1103/PhysRevD.90.084030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational self-force has thus far been formulated in background
spacetimes for which the metric is a solution to the Einstein field equations
in vacuum. While this formulation is sufficient to describe the motion of a
small object around a black hole, other applications require a more general
formulation that... | [
{
"created": "Thu, 19 Jun 2014 17:00:04 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Zimmerman",
"Peter",
""
],
[
"Poisson",
"Eric",
""
]
] | The gravitational self-force has thus far been formulated in background spacetimes for which the metric is a solution to the Einstein field equations in vacuum. While this formulation is sufficient to describe the motion of a small object around a black hole, other applications require a more general formulation that a... |
gr-qc/0011064 | Alexander Unzicker | Alexander Unzicker | What can Physics learn from Continuum Mechanics ? | 19 pages, LaTeX, 8 figures | null | null | null | gr-qc cond-mat.mtrl-sci hep-th | null | This paper is mostly a collection of ideas already published by various
authors, some of them even a long time ago. Its intention is to bring the
reader to know some rather unknown papers of different fields that merit
interest and to show some relations between them the author claims to have
observed. In the first s... | [
{
"created": "Mon, 20 Nov 2000 21:36:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Unzicker",
"Alexander",
""
]
] | This paper is mostly a collection of ideas already published by various authors, some of them even a long time ago. Its intention is to bring the reader to know some rather unknown papers of different fields that merit interest and to show some relations between them the author claims to have observed. In the first sec... |
gr-qc/0702101 | Catherine Williams | Catherine Williams | Asymptotic Behavior of Spherically Symmetric Marginally Trapped Tubes | 43 pages, 7 figures. Updated to agree with published version; Theorem
1 strengthened slightly, minor issues fixed | AnnalesHenriPoincare9:1029-1067,2008 | 10.1007/s00023-008-0385-5 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give conditions on a general stress-energy tensor T_{\alpha \beta} in a
spherically symmetric black hole spacetime which are sufficient to guarantee
that the black hole will contain a (spherically symmetric) marginally trapped
tube which is eventually achronal, connected, and asymptotic to the event
horizon. Price... | [
{
"created": "Mon, 19 Feb 2007 07:49:12 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Aug 2007 22:05:40 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Jan 2009 03:42:26 GMT",
"version": "v3"
}
] | 2009-01-14 | [
[
"Williams",
"Catherine",
""
]
] | We give conditions on a general stress-energy tensor T_{\alpha \beta} in a spherically symmetric black hole spacetime which are sufficient to guarantee that the black hole will contain a (spherically symmetric) marginally trapped tube which is eventually achronal, connected, and asymptotic to the event horizon. Price l... |
gr-qc/9801061 | Inyong Cho | Inyong Cho and Jemal Guven | Modelling the dynamics of global monopoles | 44 pages, REVTeX, 11 PostScript figures, submitted to the Physical
Review D. Abstract's corrected | Phys.Rev. D58 (1998) 063502 | 10.1103/PhysRevD.58.063502 | null | gr-qc astro-ph | null | A thin wall approximation is exploited to describe a global monopole coupled
to gravity. The core is modelled by de Sitter space; its boundary by a thin
wall with a constant energy density; its exterior by the asymptotic
Schwarzschild solution with negative gravitational mass $M$ and solid angle
deficit, $\Delta\Omeg... | [
{
"created": "Mon, 19 Jan 1998 02:31:30 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Jan 1998 09:17:59 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Cho",
"Inyong",
""
],
[
"Guven",
"Jemal",
""
]
] | A thin wall approximation is exploited to describe a global monopole coupled to gravity. The core is modelled by de Sitter space; its boundary by a thin wall with a constant energy density; its exterior by the asymptotic Schwarzschild solution with negative gravitational mass $M$ and solid angle deficit, $\Delta\Omega/... |
2303.08948 | Peter K.F. Kuhfittig | Peter K.F. Kuhfittig | Dark-energy wormholes in generalized Kaluza-Klein gravity | 11 pages, no figures | Journal of the Korean Physical Society, vol 84, pp. 497-503, 2024 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper discusses traversable wormholes in a dark-energy setting by
starting with a model due to Sung-Won Kim. This model, based on the
Friedmann-Lemaitre-Robertson-Walker model, is combined with a generalized
Kaluza-Klein model. It is well known that phantom dark energy can in principle
support traversable wormho... | [
{
"created": "Wed, 15 Mar 2023 21:38:15 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Dec 2023 23:54:24 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Mar 2024 19:33:10 GMT",
"version": "v3"
}
] | 2024-04-01 | [
[
"Kuhfittig",
"Peter K. F.",
""
]
] | This paper discusses traversable wormholes in a dark-energy setting by starting with a model due to Sung-Won Kim. This model, based on the Friedmann-Lemaitre-Robertson-Walker model, is combined with a generalized Kaluza-Klein model. It is well known that phantom dark energy can in principle support traversable wormhole... |
2102.05465 | Genly Le\'on | Genly Leon, Esteban Gonz\'alez, Samuel Lepe, Claudio Michea, and
Alfredo D. Millano | Averaging Generalized Scalar Field Cosmologies I: Locally Rotationally
Symmetric Bianchi III and open Friedmann-Lema\^itre-Robertson-Walker models | Research Program Averaging Generalized Scalar Field Cosmologies, part
I. 48 pages, 24 compound figures. Minor revision. References added | null | 10.1140/epjc/s10052-021-09185-7 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar field cosmologies with a generalized harmonic potential and a matter
fluid with a barotropic Equation of State (EoS) with barotropic index $\gamma$
for Locally Rotationally Symmetric (LRS) Bianchi III metric and open
Friedmann-Lema\^itre-Robertson-Walker (FLRW) metric are investigated. Methods
from the theory ... | [
{
"created": "Wed, 10 Feb 2021 14:41:30 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Feb 2021 21:48:14 GMT",
"version": "v2"
},
{
"created": "Tue, 30 Mar 2021 17:29:38 GMT",
"version": "v3"
},
{
"created": "Fri, 23 Apr 2021 00:58:41 GMT",
"version": "v4"
}
] | 2021-06-03 | [
[
"Leon",
"Genly",
""
],
[
"González",
"Esteban",
""
],
[
"Lepe",
"Samuel",
""
],
[
"Michea",
"Claudio",
""
],
[
"Millano",
"Alfredo D.",
""
]
] | Scalar field cosmologies with a generalized harmonic potential and a matter fluid with a barotropic Equation of State (EoS) with barotropic index $\gamma$ for Locally Rotationally Symmetric (LRS) Bianchi III metric and open Friedmann-Lema\^itre-Robertson-Walker (FLRW) metric are investigated. Methods from the theory of... |
1409.4314 | Georgios Lukes Gerakopoulos | Georgios Lukes-Gerakopoulos, Jonathan Seyrich, Daniela Kunst | Investigating spinning test particles: spin supplementary conditions and
the Hamiltonian formalism | 17 pages, 11 figures, accepted for publication in PRD | null | 10.1103/PhysRevD.90.104019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we report the results of a thorough numerical study of the
motion of spinning particles in Kerr spacetime with different prescriptions. We
first evaluate the Mathisson-Papapetrou equations with two different spin
supplementary conditions, namely, the Tulczyjew and the Newton-Wigner, and make
a compariso... | [
{
"created": "Mon, 15 Sep 2014 16:35:31 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Nov 2014 11:02:35 GMT",
"version": "v2"
}
] | 2014-11-19 | [
[
"Lukes-Gerakopoulos",
"Georgios",
""
],
[
"Seyrich",
"Jonathan",
""
],
[
"Kunst",
"Daniela",
""
]
] | In this paper we report the results of a thorough numerical study of the motion of spinning particles in Kerr spacetime with different prescriptions. We first evaluate the Mathisson-Papapetrou equations with two different spin supplementary conditions, namely, the Tulczyjew and the Newton-Wigner, and make a comparison ... |
gr-qc/9803011 | Don Marolf | Donald Marolf | Summary of GR15 Session D1(1), Quantum General Relativity | 4 pages ReVTeX, reference corrected | null | null | SU-GP-98/3-1 | gr-qc | null | This summary was prepared for the proceedings of the GR15 conference in Pune,
India in Dec. 1997.
| [
{
"created": "Mon, 2 Mar 1998 14:32:57 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Mar 1998 21:20:09 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Mar 1998 16:41:11 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Marolf",
"Donald",
""
]
] | This summary was prepared for the proceedings of the GR15 conference in Pune, India in Dec. 1997. |
gr-qc/0205024 | Roberto Colistete Junior | R. Colistete, Jr. | Constraints on Non-Singular Cosmological Models with Quadratic
Lagrangians | 11 pages, RevTeX, 3 Postscript figures | null | 10.1142/9789812777386_0147 | null | gr-qc | null | We consider the generalized set of theories of gravitation whose Lagrangians
contain the term $R^{2}$ : $L=\sqrt{-g}(R+\beta R^{2})$. Inserting the RW
metric with an imposed non-singular and inflationary behaviour of the scale
factor $a(t)$, and using a arbitrary perfect fluid, we study the properties of
$\rho $ and ... | [
{
"created": "Tue, 7 May 2002 10:05:32 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Colistete,",
"R.",
"Jr."
]
] | We consider the generalized set of theories of gravitation whose Lagrangians contain the term $R^{2}$ : $L=\sqrt{-g}(R+\beta R^{2})$. Inserting the RW metric with an imposed non-singular and inflationary behaviour of the scale factor $a(t)$, and using a arbitrary perfect fluid, we study the properties of $\rho $ and $p... |
gr-qc/9712087 | David Yetter | L. Crane and D.N. Yetter (Kansas State Univ.) | On the Classical Limit of the Balanced State Sum | 6 pages LaTex, 2 figures in PostScript | null | null | null | gr-qc | null | The purpose of this note is to make several advances in the interpretation of
the balanced state sum model by Barrett and Crane in gr-qc/9709028 as a quantum
theory of gravity. First, we outline a shortcoming of the definition of the
model in pointed out to us by Barrett and Baez in private communication, and
explain... | [
{
"created": "Mon, 22 Dec 1997 21:06:59 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Crane",
"L.",
"",
"Kansas State Univ."
],
[
"Yetter",
"D. N.",
"",
"Kansas State Univ."
]
] | The purpose of this note is to make several advances in the interpretation of the balanced state sum model by Barrett and Crane in gr-qc/9709028 as a quantum theory of gravity. First, we outline a shortcoming of the definition of the model in pointed out to us by Barrett and Baez in private communication, and explain h... |
2303.02021 | Jann Zosso | Lavinia Heisenberg and Nicol\'as Yunes and Jann Zosso | Gravitational wave memory beyond general relativity | 39 pages | null | 10.1103/PhysRevD.108.024010 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Gravitational wave memory is a nonoscillatory correction to the gravitational
wave strain predicted by general relativity, which has yet to be detected.
Within general relativity, its dominant component, known as the null memory,
can be understood as arising from the backreaction of the energy carried by
gravitationa... | [
{
"created": "Fri, 3 Mar 2023 15:40:36 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jul 2023 20:27:02 GMT",
"version": "v2"
}
] | 2023-07-26 | [
[
"Heisenberg",
"Lavinia",
""
],
[
"Yunes",
"Nicolás",
""
],
[
"Zosso",
"Jann",
""
]
] | Gravitational wave memory is a nonoscillatory correction to the gravitational wave strain predicted by general relativity, which has yet to be detected. Within general relativity, its dominant component, known as the null memory, can be understood as arising from the backreaction of the energy carried by gravitational ... |
gr-qc/9510067 | null | Marco Litterio, Leszek M. Soko{\l}owski, Zdzis{\l}aw A. Golda, Luca
Amendola and Andrzej Dyrek | Anisotropic Inflation from Extra Dimensions | LaTeX, 11 pages, 5 figures available via fax on request to
litterio@astrom.astro.it, submitted to Phys. Lett. B | Phys.Lett. B382 (1996) 45-52 | 10.1016/0370-2693(96)00361-9 | null | gr-qc | null | Vacuum multidimensional cosmological models with internal spaces being
compact $n$-dimensional Lie group manifolds are considered. Products of
3-spheres and $SU(3)$ manifold (a novelty in cosmology) are studied. It turns
out that the dynamical evolution of the internal space drives an accelerated
expansion of the ext... | [
{
"created": "Tue, 31 Oct 1995 16:25:07 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Litterio",
"Marco",
""
],
[
"Sokołowski",
"Leszek M.",
""
],
[
"Golda",
"Zdzisław A.",
""
],
[
"Amendola",
"Luca",
""
],
[
"Dyrek",
"Andrzej",
""
]
] | Vacuum multidimensional cosmological models with internal spaces being compact $n$-dimensional Lie group manifolds are considered. Products of 3-spheres and $SU(3)$ manifold (a novelty in cosmology) are studied. It turns out that the dynamical evolution of the internal space drives an accelerated expansion of the exter... |
0902.1857 | Farhad Darabi | F. Darabi | Modified gravity and Space-Time-Matter theory | 10 pages, contribution to the anniversary volume "The Problems of
Modern Cosmology", on the occasion of the 50th birthday of Prof. S. D.
Odintsov. Editor: Prof. P. M. Lavrov, Tomsk State Pedagogical University | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The correspondence between $f(R)$ theories of gravity and model theories
explaining induced dark energy in a 5D Ricci-flat universe, known as the
Space-Time-Matter theory (STM), is studied. It is shown that such
correspondence may be used to interpret the four dimensional expressions,
induced from geometry in 5D STM ... | [
{
"created": "Wed, 11 Feb 2009 11:41:05 GMT",
"version": "v1"
}
] | 2009-02-12 | [
[
"Darabi",
"F.",
""
]
] | The correspondence between $f(R)$ theories of gravity and model theories explaining induced dark energy in a 5D Ricci-flat universe, known as the Space-Time-Matter theory (STM), is studied. It is shown that such correspondence may be used to interpret the four dimensional expressions, induced from geometry in 5D STM th... |
2106.08653 | Bin Wu | Duo Li, Bin Wu, Zhen-Ming Xu and Wen-Li Yang | A shell of Bosons in Spherically Symmetric spacetimes | 16 pages;v2:published version | Phys.Lett.B 820(2021) 136588 | 10.1016/j.physletb.2021.136588 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The thermodynamic properties of a shell of bosons with the inner surface
locating at Planck length away from the horizon of Schwarzschild black holes by
using statistical mechanics are studied. The covariant partition function of
bosons is obtained, from which the Bose-Einstein condensation of bosons is
found at a no... | [
{
"created": "Wed, 16 Jun 2021 09:32:06 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Aug 2021 03:56:40 GMT",
"version": "v2"
}
] | 2021-08-31 | [
[
"Li",
"Duo",
""
],
[
"Wu",
"Bin",
""
],
[
"Xu",
"Zhen-Ming",
""
],
[
"Yang",
"Wen-Li",
""
]
] | The thermodynamic properties of a shell of bosons with the inner surface locating at Planck length away from the horizon of Schwarzschild black holes by using statistical mechanics are studied. The covariant partition function of bosons is obtained, from which the Bose-Einstein condensation of bosons is found at a non-... |
2008.08317 | Javier Relancio | J.J. Relancio, S. Liberati | Constraints on the deformation scale of a geometry in the cotangent
bundle | 11 pages | Phys. Rev. D 102, 104025 (2020) | 10.1103/PhysRevD.102.104025 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are several studies proposing phenomenological consequences of a
deformation of special and general relativity. Here, we cast novel constraints
on the deformation parameter of a metric in the cotangent bundle accounting for
a curved momentum space. In an expanding universe, we study three possible
observations ... | [
{
"created": "Wed, 19 Aug 2020 08:07:42 GMT",
"version": "v1"
}
] | 2020-11-18 | [
[
"Relancio",
"J. J.",
""
],
[
"Liberati",
"S.",
""
]
] | There are several studies proposing phenomenological consequences of a deformation of special and general relativity. Here, we cast novel constraints on the deformation parameter of a metric in the cotangent bundle accounting for a curved momentum space. In an expanding universe, we study three possible observations th... |
gr-qc/0009060 | Jorge Pullin | Jorge Pullin | Matters of Gravity, the newsletter of the APS Topical Group on
Gravitation | 26 pages, LaTeX with epsf and html.sty, ISSN 1527-3431, Jorge Pullin
(editor), html, ps and pdf versions at http://gravity.phys.psu.edu/mog.html | null | null | MOG-16 | gr-qc | null | Research Briefs:
Cosmic microwave background anisotropy experiments, by Sean Carroll
LISA Project Update by Bill Folkner
An update on the r-mode instability, by Nils Andersson
Laboratory experiments: news from MG9, by Riley Newman
Progress toward Commissioning the LIGO detectors, by Stan Whitcomb
160 Hour... | [
{
"created": "Sun, 17 Sep 2000 21:38:08 GMT",
"version": "v1"
}
] | 2009-03-10 | [
[
"Pullin",
"Jorge",
""
]
] | Research Briefs: Cosmic microwave background anisotropy experiments, by Sean Carroll LISA Project Update by Bill Folkner An update on the r-mode instability, by Nils Andersson Laboratory experiments: news from MG9, by Riley Newman Progress toward Commissioning the LIGO detectors, by Stan Whitcomb 160 Hours of Data Take... |
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