id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1812.06126 | Shawn Rosofsky | Shawn Rosofsky, Roman Gold, Cecilia Chirenti, E. A. Huerta and M.
Coleman Miller | Probing neutron star structure via f-mode oscillations and damping in
dynamical spacetime models | 14 pages, 12 figures, 1 appendix. Submitted to PRD | Phys. Rev. D 99, 084024 (2019) | 10.1103/PhysRevD.99.084024 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave and electromagnetic observations can provide new insights
into the nature of matter at supra-nuclear densities inside neutron stars.
Improvements in electromagnetic and gravitational wave sensing instruments
continue to enhance the accuracy with which they can measure the masses, radii,
and tidal d... | [
{
"created": "Fri, 14 Dec 2018 19:27:43 GMT",
"version": "v1"
}
] | 2019-04-24 | [
[
"Rosofsky",
"Shawn",
""
],
[
"Gold",
"Roman",
""
],
[
"Chirenti",
"Cecilia",
""
],
[
"Huerta",
"E. A.",
""
],
[
"Miller",
"M. Coleman",
""
]
] | Gravitational wave and electromagnetic observations can provide new insights into the nature of matter at supra-nuclear densities inside neutron stars. Improvements in electromagnetic and gravitational wave sensing instruments continue to enhance the accuracy with which they can measure the masses, radii, and tidal def... |
gr-qc/0102028 | Jian Dai | Jian Dai, Xing-Chang Song (Theory Group, Department of Physics, Peking
University) | Vacuum Solutions of Classical Gravity on Cyclic Groups from
Noncommutative Geometry | Latex 7 pages; no figures. Significant modifications being given,
with references added | Commun.Theor.Phys. 37 (2002) 11-14 | 10.1088/0253-6102/37/1/11 | null | gr-qc hep-lat hep-th | null | Based on the observation that the moduli of a link variable on a cyclic group
modify Connes' distance on this group, we construct several action functionals
for this link variable within the framework of noncommutative geometry. After
solving the equations of motion, we find that one type of action gives
nontrivial v... | [
{
"created": "Wed, 7 Feb 2001 16:30:17 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Feb 2001 09:37:19 GMT",
"version": "v2"
},
{
"created": "Tue, 20 Feb 2001 14:28:26 GMT",
"version": "v3"
},
{
"created": "Wed, 4 Apr 2001 18:22:02 GMT",
"version": "v4"
}
] | 2018-01-17 | [
[
"Dai",
"Jian",
"",
"Theory Group, Department of Physics, Peking\n University"
],
[
"Song",
"Xing-Chang",
"",
"Theory Group, Department of Physics, Peking\n University"
]
] | Based on the observation that the moduli of a link variable on a cyclic group modify Connes' distance on this group, we construct several action functionals for this link variable within the framework of noncommutative geometry. After solving the equations of motion, we find that one type of action gives nontrivial vac... |
2108.01774 | Iara Ota | Iara Ota and Cecilia Chirenti | Black hole spectroscopy horizons for current and future gravitational
wave detectors | 19 pages, 17 figures, version accepted for publication on PRD | Phys. Rev. D 105, 044015 (2022) | 10.1103/PhysRevD.105.044015 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole spectroscopy is the proposal to observe multiple quasinormal modes
in the ringdown of a binary black hole merger. In addition to the fundamental
quadrupolar mode, overtones and higher harmonics may be present and detectable
in the gravitational wave signal, allowing for tests of the no-hair theorem. We
ana... | [
{
"created": "Tue, 3 Aug 2021 22:15:38 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jan 2022 00:05:31 GMT",
"version": "v2"
}
] | 2022-02-14 | [
[
"Ota",
"Iara",
""
],
[
"Chirenti",
"Cecilia",
""
]
] | Black hole spectroscopy is the proposal to observe multiple quasinormal modes in the ringdown of a binary black hole merger. In addition to the fundamental quadrupolar mode, overtones and higher harmonics may be present and detectable in the gravitational wave signal, allowing for tests of the no-hair theorem. We analy... |
0806.2634 | Albert Roura | Guillem P\'erez-Nadal, Albert Roura, Enric Verdaguer | Backreaction from non-conformal quantum fields in de Sitter spacetime | 31 pages | Class.Quant.Grav.25:154013,2008 | 10.1088/0264-9381/25/15/154013 | LA-UR-08-0557 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the backreaction on the mean field geometry due to a non-conformal
quantum field in a Robertson-Walker background. In the regime of small mass and
small deviation from conformal coupling, we compute perturbatively the
expectation value of the stress tensor of the field for a variety of vacuum
states, and use... | [
{
"created": "Mon, 16 Jun 2008 18:07:58 GMT",
"version": "v1"
}
] | 2009-12-02 | [
[
"Pérez-Nadal",
"Guillem",
""
],
[
"Roura",
"Albert",
""
],
[
"Verdaguer",
"Enric",
""
]
] | We study the backreaction on the mean field geometry due to a non-conformal quantum field in a Robertson-Walker background. In the regime of small mass and small deviation from conformal coupling, we compute perturbatively the expectation value of the stress tensor of the field for a variety of vacuum states, and use i... |
1606.08505 | Peter Zimmerman | Marc Casals, Samuel E. Gralla, and Peter Zimmerman | Horizon Instability of Extremal Kerr Black Holes: Nonaxisymmetric Modes
and Enhanced Growth Rate | 7 pages. 1 figure | Phys. Rev. D 94, 064003 (2016) | 10.1103/PhysRevD.94.064003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the horizon instability of the extremal Kerr black hole is
associated with a singular branch point in the Green function at the
superradiant bound frequency. We study generic initial data supported away from
the horizon and find an enhanced growth rate due to nonaxisymmetric modes. The
growth is controll... | [
{
"created": "Mon, 27 Jun 2016 22:38:46 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Jul 2016 19:45:45 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Jul 2016 13:19:32 GMT",
"version": "v3"
}
] | 2016-09-07 | [
[
"Casals",
"Marc",
""
],
[
"Gralla",
"Samuel E.",
""
],
[
"Zimmerman",
"Peter",
""
]
] | We show that the horizon instability of the extremal Kerr black hole is associated with a singular branch point in the Green function at the superradiant bound frequency. We study generic initial data supported away from the horizon and find an enhanced growth rate due to nonaxisymmetric modes. The growth is controlled... |
gr-qc/9606083 | Benni Reznik | B. Reznik | Trans-Planckian Tail in a Theory with a Cutoff | 17 pages, RevTex | Phys.Rev. D55 (1997) 2152-2158 | 10.1103/PhysRevD.55.2152 | null | gr-qc hep-th quant-ph | null | Trans-planckian frequencies can be mimicked outside a black-hole horizon as a
tail of an exponentially large amplitude wave that is mostly hidden behind the
horizon. The present proposal requires implementing a final state condition.
This condition involves only frequencies below the cutoff scale. It may be
interpret... | [
{
"created": "Fri, 28 Jun 1996 04:50:55 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Reznik",
"B.",
""
]
] | Trans-planckian frequencies can be mimicked outside a black-hole horizon as a tail of an exponentially large amplitude wave that is mostly hidden behind the horizon. The present proposal requires implementing a final state condition. This condition involves only frequencies below the cutoff scale. It may be interpreted... |
1506.01282 | Xiongjun Fang | Xiongjun Fang, Sijie Gao | Proof of entropy principle in Einstein-Maxwell theory | LaTex, 16 pages, some minor changes and simplified derivations,
references added, matches published version | Phys. Rev. D 92, 024044 (2015) | 10.1103/PhysRevD.92.024044 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a static self-gravitating charged perfect fluid system in the
Einstein-Maxwell theory. Assume Maxwell's equation and the Einstein constraint
equation are satisfied, and the temperature of the fluid obeys Tolman's law.
Then we prove that the total entropy of the fluid achieves an extremum implies
other com... | [
{
"created": "Wed, 3 Jun 2015 15:36:46 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Jun 2015 14:00:30 GMT",
"version": "v2"
},
{
"created": "Sun, 2 Aug 2015 09:33:41 GMT",
"version": "v3"
}
] | 2015-08-04 | [
[
"Fang",
"Xiongjun",
""
],
[
"Gao",
"Sijie",
""
]
] | We consider a static self-gravitating charged perfect fluid system in the Einstein-Maxwell theory. Assume Maxwell's equation and the Einstein constraint equation are satisfied, and the temperature of the fluid obeys Tolman's law. Then we prove that the total entropy of the fluid achieves an extremum implies other compo... |
1204.3654 | William C. C. Lima | A. G. S. Landulfo, W. C. C. Lima, G. E. A. Matsas, and D. A. T.
Vanzella | Particle creation due to tachyonic instability in relativistic stars | 12 pages, 2 figures, discussion improved: paragraph added at the end
of Sec. V B (published version) | Phys.Rev.D86:104025,2012 | 10.1103/PhysRevD.86.104025 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dense enough compact objects were recently shown to lead to an exponentially
fast increase of the vacuum energy density for some free scalar fields properly
coupled to the spacetime curvature as a consequence of a tachyonic-like
instability. Once the effect is triggered, the star energy density would be
overwhelmed b... | [
{
"created": "Mon, 16 Apr 2012 21:07:08 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Aug 2012 15:56:16 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Nov 2012 17:35:18 GMT",
"version": "v3"
}
] | 2012-11-22 | [
[
"Landulfo",
"A. G. S.",
""
],
[
"Lima",
"W. C. C.",
""
],
[
"Matsas",
"G. E. A.",
""
],
[
"Vanzella",
"D. A. T.",
""
]
] | Dense enough compact objects were recently shown to lead to an exponentially fast increase of the vacuum energy density for some free scalar fields properly coupled to the spacetime curvature as a consequence of a tachyonic-like instability. Once the effect is triggered, the star energy density would be overwhelmed by ... |
2402.01818 | Omar Nemoul | Omar Nemoul, Hichem Guergouri, and Jamal Mimouni | Studying the Behavior of Radial Free Geodesics in {\Lambda}CDM Model | 28 pages, 6 figures, and 1 table | null | 10.1142/S0219887824501342 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents an analytical study of the behavior of radial
free-geodesics in the Friedmann-Lema\^itre-Robertson-Walker (FLRW) spacetime
within the Lambda Cold Dark Matter ({\Lambda}CDM) model. Using the radial free
motion solutions, we provide two methods for characterizing the geodesics and
defines a general ... | [
{
"created": "Fri, 2 Feb 2024 15:19:31 GMT",
"version": "v1"
}
] | 2024-02-06 | [
[
"Nemoul",
"Omar",
""
],
[
"Guergouri",
"Hichem",
""
],
[
"Mimouni",
"Jamal",
""
]
] | This paper presents an analytical study of the behavior of radial free-geodesics in the Friedmann-Lema\^itre-Robertson-Walker (FLRW) spacetime within the Lambda Cold Dark Matter ({\Lambda}CDM) model. Using the radial free motion solutions, we provide two methods for characterizing the geodesics and defines a general fo... |
gr-qc/9411066 | null | Jacek Jezierski | On the relation between metric and spin--2 form. of lin. Ein. theory | 20 pages, latex | Gen.Rel.Grav.27:821-843,1995 | 10.1007/BF02113066 | null | gr-qc | null | A twenty--dimensional space of charged solutions of spin--2 equations is
proposed. The relation with extended (via dilatation) Poincar\'e group is
analyzed. Locally, each solution of the theory may be described in terms of a
potential, which can be interpreted as a metric tensor satisfying linearized
Einstein equatio... | [
{
"created": "Mon, 28 Nov 1994 15:09:20 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Jezierski",
"Jacek",
""
]
] | A twenty--dimensional space of charged solutions of spin--2 equations is proposed. The relation with extended (via dilatation) Poincar\'e group is analyzed. Locally, each solution of the theory may be described in terms of a potential, which can be interpreted as a metric tensor satisfying linearized Einstein equations... |
2211.03512 | Zhen-Ming Xu | Zhen-Ming Xu, Bin Wu, and Wen-Li Yang | Rate of the phase transition for a charged anti-de Sitter black hole | 8 pages, 3 figures, match the published version | SCIENCE CHINA Physics, Mechanics & Astronomy, 66(4), 240411 (2023) | 10.1007/s11433-022-2022-6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Phase transition is a core content of black hole thermodynamics. This study
adopted the Kramer's escape rate method for describing the Brownian motion of
particles in an external field to investigate the intensity of the phase
transition between small and large black hole states. Some existing studies
mostly focused ... | [
{
"created": "Tue, 1 Nov 2022 08:04:03 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Mar 2023 03:26:54 GMT",
"version": "v2"
}
] | 2023-03-07 | [
[
"Xu",
"Zhen-Ming",
""
],
[
"Wu",
"Bin",
""
],
[
"Yang",
"Wen-Li",
""
]
] | Phase transition is a core content of black hole thermodynamics. This study adopted the Kramer's escape rate method for describing the Brownian motion of particles in an external field to investigate the intensity of the phase transition between small and large black hole states. Some existing studies mostly focused on... |
1501.06724 | Jorge Rocha | Jorge V. Rocha | Gravitational collapse with rotating thin shells and cosmic censorship | 11 pages, 2 figures, proceedings of the VII Black Holes Workshop; v2:
references updated and minor corrections, matches version to be published in
International Journal of Modern Physics D | International Journal of Modern Physics D, Vol. 24, No. 9 (2015)
1542002 | 10.1142/S021827181542002X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational collapse of matter in the presence of rotation is a mostly
unexplored topic but it might have important implications for cosmic
censorship. Recently a convenient setup was identified to address this problem,
by considering thin matter shells at the interface between two equal angular
momenta Myers-Perry... | [
{
"created": "Tue, 27 Jan 2015 10:25:47 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Mar 2015 11:32:26 GMT",
"version": "v2"
}
] | 2015-04-14 | [
[
"Rocha",
"Jorge V.",
""
]
] | Gravitational collapse of matter in the presence of rotation is a mostly unexplored topic but it might have important implications for cosmic censorship. Recently a convenient setup was identified to address this problem, by considering thin matter shells at the interface between two equal angular momenta Myers-Perry s... |
2011.05055 | Guillaume Boileau | Guillaume Boileau, Nelson Christensen, Renate Meyer, Neil J. Cornish | Spectral separation of the stochastic gravitational-wave background for
LISA: observing both cosmological and astrophysical backgrounds | The paper has been corrected | Phys. Rev. D 103, 103529 (2021) | 10.1103/PhysRevD.103.103529 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the goal of attempting to observe a stochastic gravitational wave
background (SGWB) with LISA, the spectral separability of the cosmological and
astrophysical backgrounds is important to estimate. We attempt to determine the
level with which a cosmological background can be observed given the predicted
astrophys... | [
{
"created": "Tue, 10 Nov 2020 11:40:57 GMT",
"version": "v1"
},
{
"created": "Wed, 26 May 2021 11:33:04 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Oct 2021 11:21:26 GMT",
"version": "v3"
}
] | 2021-10-08 | [
[
"Boileau",
"Guillaume",
""
],
[
"Christensen",
"Nelson",
""
],
[
"Meyer",
"Renate",
""
],
[
"Cornish",
"Neil J.",
""
]
] | With the goal of attempting to observe a stochastic gravitational wave background (SGWB) with LISA, the spectral separability of the cosmological and astrophysical backgrounds is important to estimate. We attempt to determine the level with which a cosmological background can be observed given the predicted astrophysic... |
gr-qc/9311015 | Bill Pezzaglia | William Pezzaglia and Alfred Differ | A Clifford Dyadic Superfield from Bilateral Interactions of Geometric
Multispin Dirac Theory | 10 pages LaTex (kluwer.sty macro), report# clf-alg/pezz9304, [Summary
of talk Sept. 22, 1993 at Ixtapa-Zihuatanejo, Mexico, XXIIth International
Conference on Differential Geometric Methods in Theoretical Physics] | null | null | null | gr-qc hep-th | null | Multivector quantum mechanics utilizes wavefunctions which are Clifford
aggregates (e.g. sum of scalar, vector, bivector). This is equivalent to multi-
spinors constructed of Dirac matrices, with the representation independent form
of the generators geometrically interpreted as the basis vectors of spacetime.
Multipl... | [
{
"created": "Tue, 9 Nov 1993 12:25:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pezzaglia",
"William",
""
],
[
"Differ",
"Alfred",
""
]
] | Multivector quantum mechanics utilizes wavefunctions which are Clifford aggregates (e.g. sum of scalar, vector, bivector). This is equivalent to multi- spinors constructed of Dirac matrices, with the representation independent form of the generators geometrically interpreted as the basis vectors of spacetime. Multiple ... |
2201.01138 | Lang Liu | Lang Liu and Sang Pyo Kim | Gravitational and electromagnetic radiations from binary black holes
with electric and magnetic charges | Proceedings for the 17th Italian-Korean Symposium on Relativistic
Astrophysics, Korea, August 2-6, 2021; 12 pages, 5 figures; Talk based on
arXiv:2008.02326 and arXiv:2011.13586 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein-Maxwell theory has black hole solutions with electric and
magnetic charges. In the standard model for particle physics, dyons with
electric and magnetic charges would have been formed in the early universe. We
derive the equations of motion of black hole binaries with electric and
magnetic charges and ex... | [
{
"created": "Tue, 4 Jan 2022 13:55:53 GMT",
"version": "v1"
}
] | 2022-01-05 | [
[
"Liu",
"Lang",
""
],
[
"Kim",
"Sang Pyo",
""
]
] | The Einstein-Maxwell theory has black hole solutions with electric and magnetic charges. In the standard model for particle physics, dyons with electric and magnetic charges would have been formed in the early universe. We derive the equations of motion of black hole binaries with electric and magnetic charges and expl... |
2408.07789 | Saeed Haddadi | Hazhir Dolatkhah, Artur Czerwinski, Asad Ali, Saif Al-Kuwari, and
Saeed Haddadi | Tripartite measurement uncertainty in Schwarzschild space-time | 8 pages, 6 figures. All comments are welcome | null | null | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | The effect of Hawking radiation on tripartite measurement uncertainty in a
Schwarzschild black hole background is analyzed in this study. Two scenarios
are examined: in the first, quantum memory particles approach a Schwarzschild
black hole and are positioned near the event horizon, while the particle being
measured ... | [
{
"created": "Wed, 14 Aug 2024 20:03:01 GMT",
"version": "v1"
}
] | 2024-08-16 | [
[
"Dolatkhah",
"Hazhir",
""
],
[
"Czerwinski",
"Artur",
""
],
[
"Ali",
"Asad",
""
],
[
"Al-Kuwari",
"Saif",
""
],
[
"Haddadi",
"Saeed",
""
]
] | The effect of Hawking radiation on tripartite measurement uncertainty in a Schwarzschild black hole background is analyzed in this study. Two scenarios are examined: in the first, quantum memory particles approach a Schwarzschild black hole and are positioned near the event horizon, while the particle being measured re... |
2011.12734 | Abbas Mirahmadi | Abbas Mirahmadi | Analytical Study of Gravitational Waves | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of the present thesis is to review the Blanchet-Damour approach to
analytical study of gravitational waves emitted by localized perfect fluid
sources. It is assumed these perfect fluids are such that it is possible to
define small parameters for asymptotic expansions. Asymptotic expansions in
this approach ar... | [
{
"created": "Tue, 24 Nov 2020 17:15:38 GMT",
"version": "v1"
}
] | 2020-11-26 | [
[
"Mirahmadi",
"Abbas",
""
]
] | The aim of the present thesis is to review the Blanchet-Damour approach to analytical study of gravitational waves emitted by localized perfect fluid sources. It is assumed these perfect fluids are such that it is possible to define small parameters for asymptotic expansions. Asymptotic expansions in this approach are ... |
gr-qc/9912076 | Konstantina Savvidou | Konstantina Savvidou | Continuous Time in Consistent Histories | 95 pages, Latex, A PhD thesis, submitted at Imperial College, London,
UK. It provides a thorough review of the HPO consistent histories programme | null | null | null | gr-qc | null | We discuss the case of histories labelled by a continuous time parameter in
the {\em History Projection Operator} consistent-histories quantum theory. We
describe how the appropriate representation of the history algebra may be
chosen by requiring the existence of projection operators that represent
propositions abou... | [
{
"created": "Fri, 17 Dec 1999 20:47:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Savvidou",
"Konstantina",
""
]
] | We discuss the case of histories labelled by a continuous time parameter in the {\em History Projection Operator} consistent-histories quantum theory. We describe how the appropriate representation of the history algebra may be chosen by requiring the existence of projection operators that represent propositions about ... |
1004.4440 | Jiliang Jing | Chikun Ding, Songbai Chen, Jiliang Jing | Analytical expressions for greybody factor and dynamic evolution for
scalar field in Ho\v{r}ava-Lifshitz black hole | 13 pages, 4 figures, Accepted for publication in PRD | Phys.Rev.D82:024031,2010 | 10.1103/PhysRevD.82.024031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the propagation and evolution for a massless scalar field in
the background of $\lambda=1/2$ Ho\v{r}ava-Lifshitz black hole with the
condition of detailed balance. We fortunately obtain an exact solution for the
Klein-Gordon equation. Then, we find an analytical expression for the greybody
factor which... | [
{
"created": "Mon, 26 Apr 2010 09:13:48 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Jul 2010 15:17:56 GMT",
"version": "v2"
}
] | 2010-09-10 | [
[
"Ding",
"Chikun",
""
],
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | We investigate the propagation and evolution for a massless scalar field in the background of $\lambda=1/2$ Ho\v{r}ava-Lifshitz black hole with the condition of detailed balance. We fortunately obtain an exact solution for the Klein-Gordon equation. Then, we find an analytical expression for the greybody factor which i... |
1511.08926 | Seema Satin | Seema Satin | Noise Kernel for Reissner Nordstrom Metric: Results at Cauchy Horizon | null | null | 10.1103/PhysRevD.93.084007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain point separated Noise Kernel for the Reissner Nordstr\"{o}m
metric.The Noise Kernel defines the fluctuations of the quantum stress tensor
and is of central importance to Semiclassical Stochastic Gravity.The metric is
modeled as gravitationally collapsing spacetime, by using suitable coordinate
transformatio... | [
{
"created": "Sat, 28 Nov 2015 20:46:19 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Jan 2016 07:21:06 GMT",
"version": "v2"
},
{
"created": "Sat, 27 Feb 2016 10:46:16 GMT",
"version": "v3"
}
] | 2016-05-04 | [
[
"Satin",
"Seema",
""
]
] | We obtain point separated Noise Kernel for the Reissner Nordstr\"{o}m metric.The Noise Kernel defines the fluctuations of the quantum stress tensor and is of central importance to Semiclassical Stochastic Gravity.The metric is modeled as gravitationally collapsing spacetime, by using suitable coordinate transformations... |
2108.05330 | Dong-han Yeom | Suddhasattwa Brahma, Che-Yu Chen, Dong-han Yeom | Annihilation-to-nothing: DeWitt boundary condition inside a black hole | 24 pages, 9 figures | Eur.Phys.J. C82, 772 (2022) | 10.1140/epjc/s10052-022-10730-1 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In canonical quantum gravity, the wave function for a hypersurface inside a
Schwarzschild black hole can be obtained by solving the Wheeler-DeWitt
equation. What is of prime importance is the behavior of the wave function for
the future boundary near the singularity, and the DeWitt boundary condition
implies that it ... | [
{
"created": "Wed, 11 Aug 2021 17:13:34 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Sep 2022 04:40:50 GMT",
"version": "v2"
}
] | 2022-09-05 | [
[
"Brahma",
"Suddhasattwa",
""
],
[
"Chen",
"Che-Yu",
""
],
[
"Yeom",
"Dong-han",
""
]
] | In canonical quantum gravity, the wave function for a hypersurface inside a Schwarzschild black hole can be obtained by solving the Wheeler-DeWitt equation. What is of prime importance is the behavior of the wave function for the future boundary near the singularity, and the DeWitt boundary condition implies that it sh... |
1201.4630 | Anzhong Wang | Yongqing Huang, Anzhong Wang, and Qiang Wu | Inflation in general covariant theory of gravity | 19 pages, 0 figures. Version published in JCAP, 10 (2012) 010 | null | 10.1088/1475-7516/2012/10/010 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study inflation in the framework of the nonrelativistic
general covariant theory of the Ho\v{r}ava-Lifshitz gravity with the
projectability condition and an arbitrary coupling constant $\lambda$. We find
that the Friedmann-Robterson-Walker (FRW) universe is necessarily flat in such
a setup. We work ... | [
{
"created": "Mon, 23 Jan 2012 06:03:31 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Oct 2012 03:17:14 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Huang",
"Yongqing",
""
],
[
"Wang",
"Anzhong",
""
],
[
"Wu",
"Qiang",
""
]
] | In this paper, we study inflation in the framework of the nonrelativistic general covariant theory of the Ho\v{r}ava-Lifshitz gravity with the projectability condition and an arbitrary coupling constant $\lambda$. We find that the Friedmann-Robterson-Walker (FRW) universe is necessarily flat in such a setup. We work ou... |
1905.00064 | Roman Konoplya | R. A. Konoplya | Shadow of a black hole surrounded by dark matter | 7 pages, 6 figures, revtex, the published version | Physics Letters B 795 (2019) pp. 1-6 | 10.1016/j.physletb.2019.05.043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a simple spherical model consisting of a Schwarzschild black hole
of mass $M$ and a dark matter of mass $\Delta M$ around it. The general formula
for the radius of black-hole shadow has been derived in this case. It is shown
that the change of the shadow is not negligible, once the effective radius of
the... | [
{
"created": "Tue, 30 Apr 2019 19:08:54 GMT",
"version": "v1"
},
{
"created": "Sun, 5 May 2019 22:01:17 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Jun 2019 14:46:43 GMT",
"version": "v3"
}
] | 2019-06-05 | [
[
"Konoplya",
"R. A.",
""
]
] | We consider a simple spherical model consisting of a Schwarzschild black hole of mass $M$ and a dark matter of mass $\Delta M$ around it. The general formula for the radius of black-hole shadow has been derived in this case. It is shown that the change of the shadow is not negligible, once the effective radius of the d... |
1905.07277 | Shilpa Kastha | Shilpa Kastha, Anuradha Gupta, K. G. Arun, B. S. Sathyaprakash and
Chris Van Den Broeck | Testing the multipole structure and conservative dynamics of compact
binaries using gravitational wave observations: The spinning case | 16 pages, 8 figures, Mathematica readable supplemental material file
for all the inputs to calculate the parametrized waveform is with the source | Phys. Rev. D 100, 044007 (2019) | 10.1103/PhysRevD.100.044007 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In an earlier work [S. Kastha et al., PRD {\bf 98}, 124033 (2018)], we
developed the {\it parametrized multipolar gravitational wave phasing formula}
to test general relativity, for the non-spinning compact binaries in
quasi-circular orbit. In this paper, we extend the method and include the
important effect of spins... | [
{
"created": "Fri, 17 May 2019 14:04:57 GMT",
"version": "v1"
}
] | 2019-08-14 | [
[
"Kastha",
"Shilpa",
""
],
[
"Gupta",
"Anuradha",
""
],
[
"Arun",
"K. G.",
""
],
[
"Sathyaprakash",
"B. S.",
""
],
[
"Broeck",
"Chris Van Den",
""
]
] | In an earlier work [S. Kastha et al., PRD {\bf 98}, 124033 (2018)], we developed the {\it parametrized multipolar gravitational wave phasing formula} to test general relativity, for the non-spinning compact binaries in quasi-circular orbit. In this paper, we extend the method and include the important effect of spins i... |
gr-qc/0105086 | Mohammad Nouri-Zonoz | Mohammad Nouri-Zonoz and Ali Reza Tavanfar | Plane symmetric analogue of NUT space | 16 pages, REVTex format, typos corrected,reference added and a
conclusion corrected | Class.Quant.Grav.18:4293-4302,2001 | 10.1088/0264-9381/18/20/308 | IPM/P-2001/010 | gr-qc | null | In this article on the basis of a new definition of spacetime symmetry, which
is in accordance with the symmetry of the curvature invariants, we investigate
exact vacuum solutions of Einstein field equations corresponding to both static
and stationary plane symmetric spacetimes using the concepts of the
(1+3)-decompo... | [
{
"created": "Thu, 24 May 2001 11:24:22 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jun 2001 12:41:26 GMT",
"version": "v2"
},
{
"created": "Sat, 9 Jun 2001 11:29:02 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Nouri-Zonoz",
"Mohammad",
""
],
[
"Tavanfar",
"Ali Reza",
""
]
] | In this article on the basis of a new definition of spacetime symmetry, which is in accordance with the symmetry of the curvature invariants, we investigate exact vacuum solutions of Einstein field equations corresponding to both static and stationary plane symmetric spacetimes using the concepts of the (1+3)-decomposi... |
1605.01587 | Hang Liu | Hang Liu and Xin-he Meng | Angular Momentum-Free of the Entropy Relations for Rotating Kaluza-Klein
Black Holes | Final version, accepted for publication by International Journal of
Theoretical Physics | Int.J.Theor.Phys. 56 (2017) no.2, 437-449 | 10.1007/s10773-016-3185-6 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on a mathematical lemma related to the Vandermonde determinant and two
theorems derived from the first law of black hole thermodynamics, we
investigate the angular momentum independence of the entropy sum as well as the
entropy product of general rotating Kaluza-Klein black holes in higher
dimensions. We show t... | [
{
"created": "Thu, 5 May 2016 13:40:56 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Jun 2016 09:54:42 GMT",
"version": "v2"
},
{
"created": "Mon, 7 Nov 2016 11:19:46 GMT",
"version": "v3"
}
] | 2017-08-28 | [
[
"Liu",
"Hang",
""
],
[
"Meng",
"Xin-he",
""
]
] | Based on a mathematical lemma related to the Vandermonde determinant and two theorems derived from the first law of black hole thermodynamics, we investigate the angular momentum independence of the entropy sum as well as the entropy product of general rotating Kaluza-Klein black holes in higher dimensions. We show tha... |
1010.3630 | Horace W. Crater | Horace W. Crater, Jesse Labello, and Steve Rubenstein | Schwarzschild Solution of the Generally Covariant Quaternionic Field
Equations of Sachs | 23 pages, appendix added | Eur.Phys.J.Plus 126:16,2011 | 10.1140/epjp/i2011-11016-x | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Sachs has derived quaternion field equations that fully exploit the
underlying symmetry of the principle of general relativity, one in which the
fundamental 10 component metric field is replaced by a 16 component four-vector
quaternion. Instead of the 10 field equations of Einstein's tensor formulation,
these equatio... | [
{
"created": "Mon, 18 Oct 2010 15:37:45 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Nov 2010 01:32:59 GMT",
"version": "v2"
}
] | 2011-04-20 | [
[
"Crater",
"Horace W.",
""
],
[
"Labello",
"Jesse",
""
],
[
"Rubenstein",
"Steve",
""
]
] | Sachs has derived quaternion field equations that fully exploit the underlying symmetry of the principle of general relativity, one in which the fundamental 10 component metric field is replaced by a 16 component four-vector quaternion. Instead of the 10 field equations of Einstein's tensor formulation, these equations... |
1005.2095 | Luis Rosales | L. Rosales, W. Barreto, C. Peralta and B. Rodr\'i guez-Mueller | Nonadiabatic charged spherical evolution in the postquasistatic
approximation | 11 pages, 16 Figures. Accepted for publication in Phys Rev D | Phys.Rev.D82:084014,2010 | 10.1103/PhysRevD.82.084014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the postquasistatic approximation, an iterative method for the
evolution of self-gravitating spheres of matter, to study the evolution of
dissipative and electrically charged distributions in General Relativity. We
evolve nonadiabatic distributions assuming an equation of state that accounts
for the anisotro... | [
{
"created": "Wed, 12 May 2010 13:34:54 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Sep 2010 05:20:32 GMT",
"version": "v2"
}
] | 2015-03-17 | [
[
"Rosales",
"L.",
""
],
[
"Barreto",
"W.",
""
],
[
"Peralta",
"C.",
""
],
[
"guez-Mueller",
"B. Rodrí",
""
]
] | We apply the postquasistatic approximation, an iterative method for the evolution of self-gravitating spheres of matter, to study the evolution of dissipative and electrically charged distributions in General Relativity. We evolve nonadiabatic distributions assuming an equation of state that accounts for the anisotropy... |
2008.09098 | Supriya Pan | H. B. Benaoum, Weiqiang Yang, Supriya Pan and Eleonora Di Valentino | Modified Emergent Dark Energy and its Astronomical Constraints | 10 pages, 4 Figures and 2 Tables; typos corrected; comments are
welcome | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a modified form of the Phenomenologically Emergent Dark Energy
(PEDE) model by showing a very elegant approach. The model is named as Modified
Emergent Dark Energy (MEDE) to distinguish from PEDE model and it includes
$\Lambda$CDM, PEDE model, Chevallier-Polarski-Linder model and other
cosmological model... | [
{
"created": "Thu, 20 Aug 2020 17:38:45 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Aug 2020 09:18:28 GMT",
"version": "v2"
}
] | 2020-08-24 | [
[
"Benaoum",
"H. B.",
""
],
[
"Yang",
"Weiqiang",
""
],
[
"Pan",
"Supriya",
""
],
[
"Di Valentino",
"Eleonora",
""
]
] | We introduce a modified form of the Phenomenologically Emergent Dark Energy (PEDE) model by showing a very elegant approach. The model is named as Modified Emergent Dark Energy (MEDE) to distinguish from PEDE model and it includes $\Lambda$CDM, PEDE model, Chevallier-Polarski-Linder model and other cosmological models ... |
2401.16126 | Ebrahim Yusofi Ramneti | S. Ahmadi, E. Yusofi, and M. A. Ramzanpour | Incorporating the Cosmological Constant in a Modified Uncertainty
Principle | 8 pages, 2 tables | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This study explores the cosmological constant problem and modified
uncertainty principle within a unified framework inspired by a void-dominated
scenario. In a recent paper~\cite{Yusofi:2022hgg}, voids were modeled as
spherical bubbles of similar average sizes, and the surface energy on the
voids' borders was calcula... | [
{
"created": "Mon, 29 Jan 2024 12:51:31 GMT",
"version": "v1"
},
{
"created": "Sat, 11 May 2024 12:03:16 GMT",
"version": "v2"
}
] | 2024-05-14 | [
[
"Ahmadi",
"S.",
""
],
[
"Yusofi",
"E.",
""
],
[
"Ramzanpour",
"M. A.",
""
]
] | This study explores the cosmological constant problem and modified uncertainty principle within a unified framework inspired by a void-dominated scenario. In a recent paper~\cite{Yusofi:2022hgg}, voids were modeled as spherical bubbles of similar average sizes, and the surface energy on the voids' borders was calculate... |
gr-qc/9612021 | Stephen R. Lau | W. Kummer and S. R. Lau (Technische Universitaet Wien) | Boundary Conditions and Quasilocal Energy in the Canonical Formulation
of All 1+1 Models of Gravity | REVTeX, 41 pages, 2 Postscript figures, 10 macros | Annals Phys.258:37-80,1997 | 10.1006/aphy.1997.5687 | TUW-96-27 | gr-qc | null | Within a first-order framework, we comprehensively examine the role played by
boundary conditions in the canonical formulation of a completely general
two-dimensional gravity model. Our analysis particularly elucidates the
perennial themes of mass and energy. The gravity models for which our arguments
are valid inclu... | [
{
"created": "Mon, 9 Dec 1996 17:59:31 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Kummer",
"W.",
"",
"Technische Universitaet Wien"
],
[
"Lau",
"S. R.",
"",
"Technische Universitaet Wien"
]
] | Within a first-order framework, we comprehensively examine the role played by boundary conditions in the canonical formulation of a completely general two-dimensional gravity model. Our analysis particularly elucidates the perennial themes of mass and energy. The gravity models for which our arguments are valid include... |
2007.09408 | Hexu Zhang | He-Xu Zhang, Yuan Chen, Tian-Chi Ma, Peng-Zhang He, and Jian-Bo Deng | Bardeen black hole surrounded by perfect fluid dark matter | It is to be published in Chinese Physics C | null | 10.1088/1674-1137/abe84c | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive an exact solution of the spherically symmetric Bardeen black hole
surrounded by perfect fluid dark matter (PFDM). By treating the magnetic charge
$g$ and dark matter parameter $\alpha$ as thermodynamic variables, we find that
the thermodynamic first law and the corresponding Smarr formula are satisfied.
The... | [
{
"created": "Sat, 18 Jul 2020 11:18:44 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Feb 2021 20:50:57 GMT",
"version": "v2"
}
] | 2021-05-26 | [
[
"Zhang",
"He-Xu",
""
],
[
"Chen",
"Yuan",
""
],
[
"Ma",
"Tian-Chi",
""
],
[
"He",
"Peng-Zhang",
""
],
[
"Deng",
"Jian-Bo",
""
]
] | We derive an exact solution of the spherically symmetric Bardeen black hole surrounded by perfect fluid dark matter (PFDM). By treating the magnetic charge $g$ and dark matter parameter $\alpha$ as thermodynamic variables, we find that the thermodynamic first law and the corresponding Smarr formula are satisfied. The t... |
1005.2740 | Dana Levanony | Dana Levanony and Amos Ori | Interior design of a two-dimensional semiclassical black hole: Quantum
transition across the singularity | Accepted to Phys. Rev. D | Phys.Rev.D81:104036,2010 | 10.1103/PhysRevD.81.104036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the internal structure of a two-dimensional dilatonic evaporating
black hole, based on the CGHS model. At the semiclassical level, a (weak)
spacelike singularity was previously found to develop inside the black hole. We
employ here a simplified quantum formulation of spacetime dynamics in the
neighborhood of... | [
{
"created": "Sun, 16 May 2010 12:01:16 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Levanony",
"Dana",
""
],
[
"Ori",
"Amos",
""
]
] | We study the internal structure of a two-dimensional dilatonic evaporating black hole, based on the CGHS model. At the semiclassical level, a (weak) spacelike singularity was previously found to develop inside the black hole. We employ here a simplified quantum formulation of spacetime dynamics in the neighborhood of t... |
2404.13447 | G\'abor Zsolt T\'oth | Istvan Racz, Gabor Zsolt Toth | Numerical investigation of the late-time tails of the solutions of the
Fackerell-Ipser equation | 28 pages, LaTeX | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The late-time behaviour of the solutions of the Fackerell-Ipser equation
(which is a wave equation for the spin-zero component of the electromagnetic
field strength tensor) on the closure of the domain of outer communication of
sub-extremal Kerr spacetime is studied numerically. Within the Kerr family, the
case of Sc... | [
{
"created": "Sat, 20 Apr 2024 19:13:39 GMT",
"version": "v1"
}
] | 2024-04-23 | [
[
"Racz",
"Istvan",
""
],
[
"Toth",
"Gabor Zsolt",
""
]
] | The late-time behaviour of the solutions of the Fackerell-Ipser equation (which is a wave equation for the spin-zero component of the electromagnetic field strength tensor) on the closure of the domain of outer communication of sub-extremal Kerr spacetime is studied numerically. Within the Kerr family, the case of Schw... |
1509.02658 | Saurya Das | Saurya Das | Bose-Einstein condensation as an alternative to inflation | This essay received an Honorable Mention in the 2015 Gravity Research
Foundation Essay Competition | Int. J. Mod. Phys. D, Vol.24 (2015) 1544001 | 10.1142/S0218271815440010 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was recently shown that gravitons with a very small mass should have
formed a Bose-Einstein condensate in the very early Universe, whose density and
quantum potential can account for the dark matter and dark energy in the
Universe respectively. Here we show that the condensation can also naturally
explain the obse... | [
{
"created": "Wed, 9 Sep 2015 07:13:27 GMT",
"version": "v1"
}
] | 2015-10-13 | [
[
"Das",
"Saurya",
""
]
] | It was recently shown that gravitons with a very small mass should have formed a Bose-Einstein condensate in the very early Universe, whose density and quantum potential can account for the dark matter and dark energy in the Universe respectively. Here we show that the condensation can also naturally explain the observ... |
0902.2921 | Tomohiro Takahashi | Tomohiro Takahashi and Jiro Soda | Stability of Lovelock Black Holes under Tensor Perturbations | 22 pages, 7 figures;v3:references added | Phys.Rev.D79:104025,2009 | 10.1103/PhysRevD.79.104025 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the stability of static black holes in the third order Lovelock
theory. We derive a master equation for tensor perturbations. Using the master
equation, we analyze the stability of Lovelock black holes mainly in seven and
eight dimensions. We find there are cases where the linear analysis breaks
down. If we ... | [
{
"created": "Tue, 17 Feb 2009 13:35:43 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Feb 2009 11:00:03 GMT",
"version": "v2"
},
{
"created": "Tue, 24 Feb 2009 08:20:50 GMT",
"version": "v3"
}
] | 2009-07-30 | [
[
"Takahashi",
"Tomohiro",
""
],
[
"Soda",
"Jiro",
""
]
] | We study the stability of static black holes in the third order Lovelock theory. We derive a master equation for tensor perturbations. Using the master equation, we analyze the stability of Lovelock black holes mainly in seven and eight dimensions. We find there are cases where the linear analysis breaks down. If we re... |
2112.08406 | Ricard Aguilera-Miret | Ricard Aguilera-Miret, Daniele Vigan\`o, Carlos Palenzuela | Universality of the turbulent magnetic field in hypermassive neutron
stars produced by binary mergers | 8 pages, 5 figures | null | 10.3847/2041-8213/ac50a7 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by-sa/4.0/ | The detection of a binary neutron star merger in 2017 through both
gravitational waves and electromagnetic emission opened a new era of
multimessenger astronomy. The understanding of the magnetic field amplification
triggered by the Kelvin-Helmholtz instability during the merger is still a
numerically unresolved prob... | [
{
"created": "Wed, 15 Dec 2021 19:00:37 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Mar 2022 10:51:24 GMT",
"version": "v2"
}
] | 2022-03-29 | [
[
"Aguilera-Miret",
"Ricard",
""
],
[
"Viganò",
"Daniele",
""
],
[
"Palenzuela",
"Carlos",
""
]
] | The detection of a binary neutron star merger in 2017 through both gravitational waves and electromagnetic emission opened a new era of multimessenger astronomy. The understanding of the magnetic field amplification triggered by the Kelvin-Helmholtz instability during the merger is still a numerically unresolved proble... |
0905.4916 | Carlo Rovelli | Kirill Krasnov, Carlo Rovelli | Black holes in full quantum gravity | 5 pages | Class.Quant.Grav.26:245009,2009 | 10.1088/0264-9381/26/24/245009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum black holes have been studied extensively in quantum gravity and
string theory, using various semiclassical or background dependent approaches.
We explore the possibility of studying black holes in the full non-perturbative
quantum theory, without recurring to semiclassical considerations, and in the
context ... | [
{
"created": "Fri, 29 May 2009 16:20:04 GMT",
"version": "v1"
}
] | 2010-02-22 | [
[
"Krasnov",
"Kirill",
""
],
[
"Rovelli",
"Carlo",
""
]
] | Quantum black holes have been studied extensively in quantum gravity and string theory, using various semiclassical or background dependent approaches. We explore the possibility of studying black holes in the full non-perturbative quantum theory, without recurring to semiclassical considerations, and in the context of... |
gr-qc/0312085 | David B. Malament | David B. Malament | On the Time Reversal Invariance of Classical Electromagnetic Theory | 24 pages, 3 figure, forthcoming in Studies in History and Philosophy
of Modern Physics | Stud.Hist.Philos.Mod.Phys. 35 (2004) 295-315 | null | null | gr-qc | null | David Albert claims that classical electromagnetic theory is not time
reversal invariant. He acknowledges that all physics books say that it is, but
claims they are "simply wrong" because they rely on an incorrect account of how
the time reversal operator acts on magnetic fields. On that account, electric
fields are ... | [
{
"created": "Thu, 18 Dec 2003 14:43:12 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Malament",
"David B.",
""
]
] | David Albert claims that classical electromagnetic theory is not time reversal invariant. He acknowledges that all physics books say that it is, but claims they are "simply wrong" because they rely on an incorrect account of how the time reversal operator acts on magnetic fields. On that account, electric fields are le... |
2402.07981 | Conor Dyson | Conor Dyson, Jaime Redondo-Yuste, Maarten van de Meent, Vitor Cardoso | Relativistic aerodynamics of spinning black holes | 15 pages, 8 figures, minor update to text and references | Phys. Rev. D 109, 104038 (2024) | 10.1103/PhysRevD.109.104038 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Astrophysical black holes do not exist in vacuum, and their motion is
affected by the galactic environment. As a black hole moves it attracts stars
and matter, creating a wake that, in turn, exerts an effective friction slowing
down the black hole. This force is known as dynamical friction, and has
significant conseq... | [
{
"created": "Mon, 12 Feb 2024 19:00:02 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Feb 2024 07:53:22 GMT",
"version": "v2"
}
] | 2024-06-11 | [
[
"Dyson",
"Conor",
""
],
[
"Redondo-Yuste",
"Jaime",
""
],
[
"van de Meent",
"Maarten",
""
],
[
"Cardoso",
"Vitor",
""
]
] | Astrophysical black holes do not exist in vacuum, and their motion is affected by the galactic environment. As a black hole moves it attracts stars and matter, creating a wake that, in turn, exerts an effective friction slowing down the black hole. This force is known as dynamical friction, and has significant conseque... |
gr-qc/9807007 | E. Montanari | Mirco Calura, Enrico Montanari and Pierluigi Fortini (University of
Ferrara and INFN sezione di Ferrara, Italy) | Lagrangian planetary equations in Schwarzschild space--time | 7 pages; revtex; accepted for publication in Class. Quantum Grav | Class.Quant.Grav. 15 (1998) 3121-3129 | 10.1088/0264-9381/15/10/015 | null | gr-qc astro-ph | null | We have developed a method to study the effects of a perturbation to the
motion of a test point--like object in a Schwarzschild spacetime. Such a method
is the extension of the Lagrangian planetary equations of classical celestial
mechanics into the framework of the full theory of general relativity. The
method provi... | [
{
"created": "Thu, 2 Jul 1998 17:31:13 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Calura",
"Mirco",
"",
"University of\n Ferrara and INFN sezione di Ferrara, Italy"
],
[
"Montanari",
"Enrico",
"",
"University of\n Ferrara and INFN sezione di Ferrara, Italy"
],
[
"Fortini",
"Pierluigi",
"",
"University of\n Ferrara and INFN sezione di ... | We have developed a method to study the effects of a perturbation to the motion of a test point--like object in a Schwarzschild spacetime. Such a method is the extension of the Lagrangian planetary equations of classical celestial mechanics into the framework of the full theory of general relativity. The method provide... |
1704.08402 | Shao-Wen Wei | Shao-Wen Wei, Yu-Xiao Liu | Black hole entropy emission property | 4 pages, 1 figure | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we examine the entropy emission property of black holes. When
the greybody factor is considered, it is found that Schwarzschild black hole is
a one-dimensional entropy emitter, which is independent of the spacetime
dimension and the spin of the emitted quanta. However, when generalized to
other black ho... | [
{
"created": "Thu, 27 Apr 2017 01:24:15 GMT",
"version": "v1"
}
] | 2017-04-28 | [
[
"Wei",
"Shao-Wen",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | In this work, we examine the entropy emission property of black holes. When the greybody factor is considered, it is found that Schwarzschild black hole is a one-dimensional entropy emitter, which is independent of the spacetime dimension and the spin of the emitted quanta. However, when generalized to other black hole... |
2011.14239 | Joel Saavedra | Ramon Becar, P.A. Gonzalez, Joel Saavedra, Yerko Vasquez and Bin Wang | Phase transitions in four-dimensional AdS black holes with a nonlinear
electrodynamics source | 19 pages, 8 figures. Some references added and minor revision | null | 10.1088/1572-9494/ac3073 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work we consider black hole solutions to Einstein theory coupled to a
nonlinear power-law electromagnetic field with a fixed exponent value. We study
the extended phase space thermodynamics in canonical and grand canonical
ensembles where the varying cosmological constant plays the role of an
effective thermo... | [
{
"created": "Sun, 29 Nov 2020 00:10:45 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Dec 2020 17:31:09 GMT",
"version": "v2"
}
] | 2021-12-08 | [
[
"Becar",
"Ramon",
""
],
[
"Gonzalez",
"P. A.",
""
],
[
"Saavedra",
"Joel",
""
],
[
"Vasquez",
"Yerko",
""
],
[
"Wang",
"Bin",
""
]
] | In this work we consider black hole solutions to Einstein theory coupled to a nonlinear power-law electromagnetic field with a fixed exponent value. We study the extended phase space thermodynamics in canonical and grand canonical ensembles where the varying cosmological constant plays the role of an effective thermody... |
gr-qc/9608011 | Joseph David Romano | Karel V. Kuchar, Joseph D. Romano, Madhavan Varadarajan | Dirac Constraint Quantization of a Dilatonic Model of Gravitational
Collapse | 37 pages, LATEX, no figures, submitted to Physical Review D | Phys.Rev.D55:795-808,1997 | 10.1103/PhysRevD.55.795 | null | gr-qc | null | We present an anomaly-free Dirac constraint quantization of the
string-inspired dilatonic gravity (the CGHS model) in an open 2-dimensional
spacetime. We show that the quantum theory has the same degrees of freedom as
the classical theory; namely, all the modes of the scalar field on an auxiliary
flat background, sup... | [
{
"created": "Mon, 5 Aug 1996 15:21:45 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Kuchar",
"Karel V.",
""
],
[
"Romano",
"Joseph D.",
""
],
[
"Varadarajan",
"Madhavan",
""
]
] | We present an anomaly-free Dirac constraint quantization of the string-inspired dilatonic gravity (the CGHS model) in an open 2-dimensional spacetime. We show that the quantum theory has the same degrees of freedom as the classical theory; namely, all the modes of the scalar field on an auxiliary flat background, suppl... |
1305.3085 | Hamid Reza Sepangi | Amir Hadi Ziaie, Paulo Vargas Moniz, Arash Ranjbar, Hamid Reza Sepangi | Einstein-Cartan gravitational collapse of a homogeneous Weyssenhoff
fluid | 23 pages, 11 figures | Eur. Phys. J. C74 (2014) 3154 | 10.1140/epjc/s10052-014-3154-2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the gravitational collapse of a spherically symmetric homogeneous
matter distribution consisting of a Weyssenhoff fluid in the presence of a
negative cosmological constant. Our aim is to investigate the effects of
torsion and spin averaged terms on the final outcome of the collapse. For a
specific interio... | [
{
"created": "Tue, 14 May 2013 09:57:25 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jun 2013 13:17:48 GMT",
"version": "v2"
},
{
"created": "Sun, 16 Feb 2014 12:25:12 GMT",
"version": "v3"
},
{
"created": "Sun, 3 Aug 2014 07:22:18 GMT",
"version": "v4"
}
] | 2017-04-19 | [
[
"Ziaie",
"Amir Hadi",
""
],
[
"Moniz",
"Paulo Vargas",
""
],
[
"Ranjbar",
"Arash",
""
],
[
"Sepangi",
"Hamid Reza",
""
]
] | We consider the gravitational collapse of a spherically symmetric homogeneous matter distribution consisting of a Weyssenhoff fluid in the presence of a negative cosmological constant. Our aim is to investigate the effects of torsion and spin averaged terms on the final outcome of the collapse. For a specific interior ... |
2310.15157 | Indrajit Sen | Indrajit Sen, Stephon Alexander, Justin Dressel | A Realist Interpretation of Unitarity in Quantum Gravity | Matches published version | Sen et al 2024 Class. Quantum Grav. 41 115005 | 10.1088/1361-6382/ad3eda | null | gr-qc astro-ph.CO hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | Unitarity is a difficult concept to implement in canonical quantum gravity
because of state non-normalizability and the problem of time. We take a realist
approach based on pilot-wave theory to address this issue in the Ashtekar
formulation of the Wheeler-DeWitt equation. We use the postulate of a definite
configurat... | [
{
"created": "Mon, 23 Oct 2023 17:56:28 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Oct 2023 07:29:22 GMT",
"version": "v2"
},
{
"created": "Sat, 25 Nov 2023 18:38:33 GMT",
"version": "v3"
},
{
"created": "Sun, 5 May 2024 17:10:10 GMT",
"version": "v4"
}
] | 2024-05-07 | [
[
"Sen",
"Indrajit",
""
],
[
"Alexander",
"Stephon",
""
],
[
"Dressel",
"Justin",
""
]
] | Unitarity is a difficult concept to implement in canonical quantum gravity because of state non-normalizability and the problem of time. We take a realist approach based on pilot-wave theory to address this issue in the Ashtekar formulation of the Wheeler-DeWitt equation. We use the postulate of a definite configuratio... |
gr-qc/0104065 | Valentin Kuzmichev | V. E. Kuzmichev and V. V. Kuzmichev (Bogolyubov Institute for
Theoretical Physics) | Properties of the quasistationary universe in context of the Big-bang
cosmology problems | 21 pages, 1 EPS figure, 1 table; revised subsection 3.7 | null | null | null | gr-qc astro-ph hep-th | null | Old and new puzzles of cosmology are reexamined from the point of view of
quantum theory of the universe developed here. It is shown that in proposed
approach the difficulties of the standard cosmology do not arise. The theory
predicts the observed dimensions of the nonhomogeneities of matter density and
the amplitud... | [
{
"created": "Thu, 19 Apr 2001 08:17:00 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Jul 2001 07:36:55 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kuzmichev",
"V. E.",
"",
"Bogolyubov Institute for\n Theoretical Physics"
],
[
"Kuzmichev",
"V. V.",
"",
"Bogolyubov Institute for\n Theoretical Physics"
]
] | Old and new puzzles of cosmology are reexamined from the point of view of quantum theory of the universe developed here. It is shown that in proposed approach the difficulties of the standard cosmology do not arise. The theory predicts the observed dimensions of the nonhomogeneities of matter density and the amplitude ... |
2205.02794 | Anisur Rahaman | Himangshu Barman, Mohamed Moussa, Homa Shababi, Anisur Rahaman | Thermodynamics of a Schwarzschild-like black hole with a minimum
observable length and the radiation process of a thin accretion disc around
it | 20 pages latex 11 figures and 2 tables, Title changes and a
considerably large part is added. arXiv admin note: text overlap with
2203.09252; text overlap with arXiv:2106.03140, arXiv:2101.07917 by other
authors without attribution | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study quantum gravity effects on the thermodynamic character and the
radiation process of the thin accretion disks around Schwarzschild-like black
hole. The quantum gravity correction is invoked through the framework of
generalization of uncertainty which is equivalent to the renormalization group
improved quantum... | [
{
"created": "Thu, 5 May 2022 17:13:35 GMT",
"version": "v1"
},
{
"created": "Tue, 10 May 2022 14:02:07 GMT",
"version": "v2"
},
{
"created": "Sun, 6 Nov 2022 08:25:30 GMT",
"version": "v3"
}
] | 2022-12-07 | [
[
"Barman",
"Himangshu",
""
],
[
"Moussa",
"Mohamed",
""
],
[
"Shababi",
"Homa",
""
],
[
"Rahaman",
"Anisur",
""
]
] | We study quantum gravity effects on the thermodynamic character and the radiation process of the thin accretion disks around Schwarzschild-like black hole. The quantum gravity correction is invoked through the framework of generalization of uncertainty which is equivalent to the renormalization group improved quantum g... |
gr-qc/0007040 | Reboucas | M.J. Reboucas | Distinguishing Marks of Simply-connected Universes | 13 pages, 4 figures, LaTeX2e. To appear in Int. J. Mod. Phys. D
(2000) | Int.J.Mod.Phys. D9 (2000) 561 | 10.1142/S0218271800000669 | CBPF-NF-031/00 | gr-qc astro-ph hep-th math-ph math.MP | null | A statistical quantity suitable for distinguishing simply-connected
Robertson-Walker (RW) universes is introduced, and its explicit expressions for
the three possible classes of simply-connected RW universes with an uniform
distribution of matter are determined. Graphs of the distinguishing mark for
each class of RW ... | [
{
"created": "Tue, 18 Jul 2000 01:56:48 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Reboucas",
"M. J.",
""
]
] | A statistical quantity suitable for distinguishing simply-connected Robertson-Walker (RW) universes is introduced, and its explicit expressions for the three possible classes of simply-connected RW universes with an uniform distribution of matter are determined. Graphs of the distinguishing mark for each class of RW un... |
gr-qc/0107024 | Wolfgang Graf | Wolfgang Graf | Nonanalytic extensions of the extreme Reissner-Nordstroem metric in
terms of weak solutions | 28 pages, 4 figures, IOP macros (MYIOPART.CLS). Added appendix plus
two references. Accepted for publication by Class. Quant. Gravity | Class.Quant.Grav. 18 (2001) 5371-5394 | 10.1088/0264-9381/18/24/304 | UWThPh-2001-26 | gr-qc | null | A basic extension of the exterior part of the extreme Reissner-Nordstroem
solution in terms of a continuous metric and gauge potential is constructed.
This extension is not smooth at the null hypersurface given by the
Cauchy-Killing horizon which separates isometric copies of the exterior metric.
The Maxwell-Einstein... | [
{
"created": "Fri, 6 Jul 2001 15:28:19 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Nov 2001 22:45:02 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Graf",
"Wolfgang",
""
]
] | A basic extension of the exterior part of the extreme Reissner-Nordstroem solution in terms of a continuous metric and gauge potential is constructed. This extension is not smooth at the null hypersurface given by the Cauchy-Killing horizon which separates isometric copies of the exterior metric. The Maxwell-Einstein s... |
gr-qc/0201067 | Spiros Cotsakis | Spiros Cotsakis | Cosmological Singularities | 41 pages, 11pt. To be published in the Springer LNP Proceedings of
the First Aegean Summer School of Cosmology held on Samos, Greece, in
September 21-29, 2001 | Lect.Notes Phys. 592 (2002) 59-94 | null | null | gr-qc | null | An overview is provided of the singularity theorems in cosmological contexts
at a level suitable for advanced graduate students. The necessary background
from tensor and causal geometry to understand the theorems is supplied, the
mathematical notion of a cosmology is described in some detail and issues
related to the... | [
{
"created": "Mon, 21 Jan 2002 10:16:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cotsakis",
"Spiros",
""
]
] | An overview is provided of the singularity theorems in cosmological contexts at a level suitable for advanced graduate students. The necessary background from tensor and causal geometry to understand the theorems is supplied, the mathematical notion of a cosmology is described in some detail and issues related to the r... |
2307.08103 | Jiaming Shi | Jiaming Shi | Cosmological constraints in covariant $f(Q)$ gravity with different
connections | 14 pages, 6 figures, 3 tables | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently it has been shown that the cosmological dynamics of covariant $f(Q)$
gravity depend on different affine connections. In this paper, two specific
$f(Q)$ models are investigated with SNe+CC+BAO+QSO observational data, and the
spatial curvature of the universe is studied in covariant $f(Q)$ gravity. It is
found... | [
{
"created": "Sun, 16 Jul 2023 17:05:45 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jul 2023 05:22:03 GMT",
"version": "v2"
},
{
"created": "Sun, 22 Oct 2023 00:03:10 GMT",
"version": "v3"
}
] | 2023-10-24 | [
[
"Shi",
"Jiaming",
""
]
] | Recently it has been shown that the cosmological dynamics of covariant $f(Q)$ gravity depend on different affine connections. In this paper, two specific $f(Q)$ models are investigated with SNe+CC+BAO+QSO observational data, and the spatial curvature of the universe is studied in covariant $f(Q)$ gravity. It is found t... |
2308.05084 | Fernando Carneiro | S. C. Ulhoa, F. L. Carneiro and J. W. Maluf | On the Thermodynamics of Gravitational Radiation | 10 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This article deals with the thermodynamics of gravitational radiation arising
from the Bondi-Sachs space-time. The equation of state found allows us to
conclude that the dependence of the energy density on the temperature is a
quadratic power of the latter. Such a conclusion is possible once the
consequences of the f... | [
{
"created": "Wed, 9 Aug 2023 17:27:07 GMT",
"version": "v1"
}
] | 2023-08-10 | [
[
"Ulhoa",
"S. C.",
""
],
[
"Carneiro",
"F. L.",
""
],
[
"Maluf",
"J. W.",
""
]
] | This article deals with the thermodynamics of gravitational radiation arising from the Bondi-Sachs space-time. The equation of state found allows us to conclude that the dependence of the energy density on the temperature is a quadratic power of the latter. Such a conclusion is possible once the consequences of the fir... |
2108.00766 | Jie Jiang | Jie Jiang, Aofei Sang, Ming Zhang | First Law of Black Hole in the Gravitational Electromagnetic System | 14 pages | JHEP 09 (2021) 199 | 10.1007/JHEP09(2021)199 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | After considering the quantum corrections of Einstein-Maxwell theory, the
effective theory will contain some higher-curvature terms and nonminimally
coupled electromagnetic fields. In this paper, we study the first law of black
holes in the gravitational electromagnetic system with the Lagrangian
$\math{L}(g_{ab}, R_... | [
{
"created": "Mon, 2 Aug 2021 10:23:11 GMT",
"version": "v1"
}
] | 2021-10-05 | [
[
"Jiang",
"Jie",
""
],
[
"Sang",
"Aofei",
""
],
[
"Zhang",
"Ming",
""
]
] | After considering the quantum corrections of Einstein-Maxwell theory, the effective theory will contain some higher-curvature terms and nonminimally coupled electromagnetic fields. In this paper, we study the first law of black holes in the gravitational electromagnetic system with the Lagrangian $\math{L}(g_{ab}, R_{a... |
1812.05074 | S. Danial Forghani | S. Danial Forghani, S. Habib Mazharimousavi, and M. Halilsoy | Thin-Shells and Thin-Shell Wormholes in New Massive Gravity | 11 pages, no figure | Eur. Phys. J. C (2019) 79: 449 | 10.1140/epjc/s10052-019-6964-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within 2+1-dimensional cosmological new massive gravity, we consider
thin-shell and thin-shell wormhole construction. For this, we introduce first,
the junction conditions apt for the fourth order terms in the action of the
theory. Then, by employing some specific static solutions in new massive
gravity, we study the... | [
{
"created": "Wed, 12 Dec 2018 18:24:57 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Feb 2019 12:25:42 GMT",
"version": "v2"
},
{
"created": "Wed, 6 Mar 2019 12:35:29 GMT",
"version": "v3"
},
{
"created": "Mon, 13 May 2019 15:37:34 GMT",
"version": "v4"
}
] | 2019-06-04 | [
[
"Forghani",
"S. Danial",
""
],
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
]
] | Within 2+1-dimensional cosmological new massive gravity, we consider thin-shell and thin-shell wormhole construction. For this, we introduce first, the junction conditions apt for the fourth order terms in the action of the theory. Then, by employing some specific static solutions in new massive gravity, we study the c... |
2007.02369 | Emilio Elizalde | Emilio Elizalde, Martiros Khurshudyan | Interplay between Swampland and Bayesian Machine Learning in
constraining cosmological models | 12 pages, 4 figures, 2 tables | null | 10.1140/epjc/s10052-021-09130-8 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Constraints on a dark energy dominated Universe are obtained from an
interplay between Bayesian Machine Learning and string Swampland criteria. The
approach here differs from previous studies, since in the generative process
Swampland criteria are used and, only later, the results of the fit are
validated, by using o... | [
{
"created": "Sun, 5 Jul 2020 15:53:27 GMT",
"version": "v1"
}
] | 2021-05-05 | [
[
"Elizalde",
"Emilio",
""
],
[
"Khurshudyan",
"Martiros",
""
]
] | Constraints on a dark energy dominated Universe are obtained from an interplay between Bayesian Machine Learning and string Swampland criteria. The approach here differs from previous studies, since in the generative process Swampland criteria are used and, only later, the results of the fit are validated, by using obs... |
1004.0760 | Anil Zenginoglu C | Anil Zenginoglu and Lawrence E. Kidder | Hyperboloidal evolution of test fields in three spatial dimensions | 10 pages, 8 figures | Phys.Rev.D81:124010,2010 | 10.1103/PhysRevD.81.124010 | CSCAMM-10-01 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the numerical implementation of a clean solution to the outer
boundary and radiation extraction problems within the 3+1 formalism for
hyperbolic partial differential equations on a given background. Our approach
is based on compactification at null infinity in hyperboloidal scri fixing
coordinates. We repo... | [
{
"created": "Tue, 6 Apr 2010 03:06:25 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Zenginoglu",
"Anil",
""
],
[
"Kidder",
"Lawrence E.",
""
]
] | We present the numerical implementation of a clean solution to the outer boundary and radiation extraction problems within the 3+1 formalism for hyperbolic partial differential equations on a given background. Our approach is based on compactification at null infinity in hyperboloidal scri fixing coordinates. We report... |
2302.07096 | Subhayan Maity | Subhayan Maity and Subenoy Chakraborty | Does diffusion mechanism favor the emergent scenario of the universe? | null | International Journal of Modern Physics A , Vol.37,No.3 (2022)
2250016 | 10.1142/S0217751X22500166 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the present work, the flat FLRW Universe has been modelled with cosmic
matter in the form of diffusive barotropic fluid. The diffusive fluid undergoes
dissipation due to diffusion mechanism in the form of cosmological scalar
field. From the perspective of non-equilibrium thermodynamics, the evolution
equations of ... | [
{
"created": "Mon, 13 Feb 2023 05:09:30 GMT",
"version": "v1"
}
] | 2023-02-22 | [
[
"Maity",
"Subhayan",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | In the present work, the flat FLRW Universe has been modelled with cosmic matter in the form of diffusive barotropic fluid. The diffusive fluid undergoes dissipation due to diffusion mechanism in the form of cosmological scalar field. From the perspective of non-equilibrium thermodynamics, the evolution equations of th... |
2110.14772 | Ricardo Gallego Torrom\'e | Ricardo Gallego Torrom\'e | On Penrose's theory of objective gravitationally induced wave function
reduction | Accepted for publication in International Journal of Geometric
Methods in Modern Physics. arXiv admin note: substantial text overlap with
arXiv:1402.5070 | null | 10.1142/S0219887822500207 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The formal structure of Penrose's gravitationally induced reduction of the
wave function mechanism is analyzed. It is shown that pushing Penrose's
argument forward leads to the interpretation of quantum coherence in
microscopic systems as an observable signature violation of general covariance.
We discuss potential a... | [
{
"created": "Wed, 27 Oct 2021 21:06:01 GMT",
"version": "v1"
}
] | 2022-09-07 | [
[
"Torromé",
"Ricardo Gallego",
""
]
] | The formal structure of Penrose's gravitationally induced reduction of the wave function mechanism is analyzed. It is shown that pushing Penrose's argument forward leads to the interpretation of quantum coherence in microscopic systems as an observable signature violation of general covariance. We discuss potential ave... |
2201.10381 | Naresh Dadhich | Naresh Dadhich | Maximum Force for Black Holes and Buchdahl Stars | 5 pages, Abstract is revamped, some references are added and the CAS
grant his acknowledged. No change in the results. Accepted for publication in
PRD | Phys. Rev. {\bf D105}, 0640044 (2022) | 10.1103/PhysRevD.105.064044 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole and Buchdahl star are identified respectively by $\Phi(R)=1/2,
4/9$ where $g_{tt}=1-2\Phi(R)$ for a spherically symmetric static metric. We
investigate the maximum force for black hole and Buchdahl star when one of the
participating objects is charged and/or rotating while the other is neutral and
non-rota... | [
{
"created": "Mon, 24 Jan 2022 05:59:56 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Mar 2022 01:15:41 GMT",
"version": "v2"
}
] | 2022-08-12 | [
[
"Dadhich",
"Naresh",
""
]
] | Black hole and Buchdahl star are identified respectively by $\Phi(R)=1/2, 4/9$ where $g_{tt}=1-2\Phi(R)$ for a spherically symmetric static metric. We investigate the maximum force for black hole and Buchdahl star when one of the participating objects is charged and/or rotating while the other is neutral and non-rotati... |
1611.04084 | Nobuyoshi Komatsu | Nobuyoshi Komatsu | Cosmological model from the holographic equipartition law with a
modified R\'{e}nyi entropy | Final version accepted for publication in EPJC. The titile is revised
and references are added. [12 pages, 4 figures] | Eur. Phys. J. C 77, 229 (2017) | 10.1140/epjc/s10052-017-4800-2 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmological equations were recently derived by Padmanabhan from the
expansion of cosmic space due to the difference between the degrees of freedom
on the surface and in the bulk in a region of space. In this study, a modified
R\'{e}nyi entropy is applied to Padmanabhan's `holographic equipartition law',
by regarding... | [
{
"created": "Sun, 13 Nov 2016 05:19:52 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Mar 2017 23:07:41 GMT",
"version": "v2"
}
] | 2017-04-14 | [
[
"Komatsu",
"Nobuyoshi",
""
]
] | Cosmological equations were recently derived by Padmanabhan from the expansion of cosmic space due to the difference between the degrees of freedom on the surface and in the bulk in a region of space. In this study, a modified R\'{e}nyi entropy is applied to Padmanabhan's `holographic equipartition law', by regarding t... |
1308.5959 | Ernesto F. Eiroa | Ernesto F. Eiroa, Carlos M. Sendra | Regular phantom black hole gravitational lensing | 14 pages, 4 figures; v2: improved and extended version, new
references added. Accepted for publication in Phys. Rev. D | Phys. Rev. D 88, 103007 (2013) | 10.1103/PhysRevD.88.103007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study regular and asymptotically flat phantom black holes as gravitational
lenses. We obtain the deflection angle in both the weak and the strong
deflection limits, from which we calculate the positions, magnifications, and
time delays of the images. We compare our results with those corresponding to
the Schwarzsc... | [
{
"created": "Tue, 27 Aug 2013 19:42:14 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Nov 2013 19:34:05 GMT",
"version": "v2"
}
] | 2013-11-27 | [
[
"Eiroa",
"Ernesto F.",
""
],
[
"Sendra",
"Carlos M.",
""
]
] | We study regular and asymptotically flat phantom black holes as gravitational lenses. We obtain the deflection angle in both the weak and the strong deflection limits, from which we calculate the positions, magnifications, and time delays of the images. We compare our results with those corresponding to the Schwarzschi... |
1807.06128 | Milinda Fernando | Milinda Fernando, David Neilsen, Hyun Lim, Eric Hirschmann and Hari
Sundar | Massively Parallel Simulations of Binary Black Hole
Intermediate-Mass-Ratio Inspirals | null | SIAM Journal on Scientific Computing 2019 | 10.1137/18M1196972 | null | gr-qc astro-ph.HE | http://creativecommons.org/publicdomain/zero/1.0/ | We present a highly-scalable framework that targets problems of interest to
the numerical relativity and broader astrophysics communities. This framework
combines a parallel octree-refined adaptive mesh with a wavelet adaptive
multiresolution and a physics module to solve the Einstein equations of general
relativity ... | [
{
"created": "Mon, 16 Jul 2018 21:54:42 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Jan 2019 19:05:19 GMT",
"version": "v2"
}
] | 2019-04-10 | [
[
"Fernando",
"Milinda",
""
],
[
"Neilsen",
"David",
""
],
[
"Lim",
"Hyun",
""
],
[
"Hirschmann",
"Eric",
""
],
[
"Sundar",
"Hari",
""
]
] | We present a highly-scalable framework that targets problems of interest to the numerical relativity and broader astrophysics communities. This framework combines a parallel octree-refined adaptive mesh with a wavelet adaptive multiresolution and a physics module to solve the Einstein equations of general relativity in... |
gr-qc/0002004 | Pia Astone | P. Astone, S. Frasca, G. Pizzella | Background Estimation in a Gravitational Wave Experiment | Latex file. 6 pages, 3 figures. Submitted to the proceeding of the 3
GWDAW workshop (Rome, dic 1999) (International journal of Modern physics D) | Int.J.Mod.Phys. D9 (2000) 341-346 | 10.1142/S0218271800000396 | null | gr-qc | null | The problem to estimate the background due to accidental coincidences in the
search for coincidences in gravitational wave experiments is discussed. The use
of delayed coincidences obtained by orderly shifting the event times of one of
the two detectors is shown to be the most correct
| [
{
"created": "Tue, 1 Feb 2000 12:38:00 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Astone",
"P.",
""
],
[
"Frasca",
"S.",
""
],
[
"Pizzella",
"G.",
""
]
] | The problem to estimate the background due to accidental coincidences in the search for coincidences in gravitational wave experiments is discussed. The use of delayed coincidences obtained by orderly shifting the event times of one of the two detectors is shown to be the most correct |
gr-qc/9902063 | Mauro Francaviglia | L. Fatibene, M. Ferraris, M. Francaviglia, M. Raiteri | Remarks on Conserved Quantities and Entropy of BTZ Black Hole Solutions.
Part I: the General Setting | PlainTEX, 16 pages. Revised version 1.1 | Phys.Rev. D60 (1999) 124012 | 10.1103/PhysRevD.60.124012 | null | gr-qc | null | The BTZ stationary black hole solution is considered and its mass and angular
momentum are calculated by means of Noether theorem. In particular, relative
conserved quantities with respect to a suitably fixed background are discussed.
Entropy is then computed in a geometric and macroscopic framework, so that it
satis... | [
{
"created": "Mon, 22 Feb 1999 09:21:35 GMT",
"version": "v1"
},
{
"created": "Wed, 26 May 1999 07:32:07 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Fatibene",
"L.",
""
],
[
"Ferraris",
"M.",
""
],
[
"Francaviglia",
"M.",
""
],
[
"Raiteri",
"M.",
""
]
] | The BTZ stationary black hole solution is considered and its mass and angular momentum are calculated by means of Noether theorem. In particular, relative conserved quantities with respect to a suitably fixed background are discussed. Entropy is then computed in a geometric and macroscopic framework, so that it satisfi... |
1809.06611 | Masato Minamitsuji | Masato Minamitsuji and Hayato Motohashi | Stealth Schwarzschild solution in shift symmetry breaking theories | 16 pages, no figure | Phys. Rev. D 98, 084027 (2018) | 10.1103/PhysRevD.98.084027 | YITP-18-104 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find stealth Schwarzschild solutions with a nontrivial profile of the
scalar field regular on the horizon in the Einstein gravity coupled to the
scalar field with the k-essence and/or generalized cubic galileon terms, which
is a subclass of the Horndeski theory breaking the shift symmetry, where the
propagation sp... | [
{
"created": "Tue, 18 Sep 2018 09:32:25 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Oct 2018 09:48:58 GMT",
"version": "v2"
}
] | 2019-05-08 | [
[
"Minamitsuji",
"Masato",
""
],
[
"Motohashi",
"Hayato",
""
]
] | We find stealth Schwarzschild solutions with a nontrivial profile of the scalar field regular on the horizon in the Einstein gravity coupled to the scalar field with the k-essence and/or generalized cubic galileon terms, which is a subclass of the Horndeski theory breaking the shift symmetry, where the propagation spee... |
gr-qc/9812072 | Junya Hashida | J. Hashida, S. Mukaigawa, T. Muta, K. Ohkura and K. Yamamoto | A Model of Curvature-Induced Phase Transitions in Inflationary Universe | 12 pages, 3 figures, REVTeX | Phys.Rev.D59:101302,1999 | 10.1103/PhysRevD.59.101302 | HUPD-9832 | gr-qc hep-ph | null | Chiral phase transitions driven by space-time curvature effects are
investigated in de Sitter space in the supersymmetric Nambu-Jona-Lasinio model
with soft supersymmetry breaking. The model is considered to be suitable for
the analysis of possible phase transitions in inflationary universe. It is
found that a restor... | [
{
"created": "Mon, 21 Dec 1998 08:58:18 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Hashida",
"J.",
""
],
[
"Mukaigawa",
"S.",
""
],
[
"Muta",
"T.",
""
],
[
"Ohkura",
"K.",
""
],
[
"Yamamoto",
"K.",
""
]
] | Chiral phase transitions driven by space-time curvature effects are investigated in de Sitter space in the supersymmetric Nambu-Jona-Lasinio model with soft supersymmetry breaking. The model is considered to be suitable for the analysis of possible phase transitions in inflationary universe. It is found that a restorat... |
1301.5460 | Hamid Reza Sepangi | F. Kheyri, M. Khodadi and H. R. Sepangi | Horava-Lifshitz early universe phase transition beyond detailed balance | 14 pages, 11 figures, to appear in Eur. Phys. J. C. arXiv admin note:
text overlap with arXiv:0912.2541, arXiv:0807.3066, arXiv:1005.3508,
arXiv:1011.4230 by other authors | Eur. Phys. J. C. 73 (2013) 2286 | 10.1140/epjc/s10052-013-2286-0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The early universe is believed to have undergone a QCD phase transition to
hadrons at about $10\mu s$ after the big bang. We study such a transition in
the context of the non-detailed balance Horava-Lifshitz theory by investigating
the effects of the dynamical coupling constant $\lambda$ in a flat universe.
The evolu... | [
{
"created": "Wed, 23 Jan 2013 10:25:22 GMT",
"version": "v1"
},
{
"created": "Sun, 27 Jan 2013 15:16:32 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Kheyri",
"F.",
""
],
[
"Khodadi",
"M.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | The early universe is believed to have undergone a QCD phase transition to hadrons at about $10\mu s$ after the big bang. We study such a transition in the context of the non-detailed balance Horava-Lifshitz theory by investigating the effects of the dynamical coupling constant $\lambda$ in a flat universe. The evoluti... |
gr-qc/0509065 | Douglas A. Singleton | V. D. Ivashchuk, V. N. Melnikov, and D. Singleton | On avoiding cosmological oscillating behavior for S-brane solutions with
diagonal metrics | Corrected typos, published in Phys. Rev. D72, 103511 (2005) | Phys.Rev. D72 (2005) 103511 | 10.1103/PhysRevD.72.103511 | null | gr-qc hep-th | null | In certain string inspired higher dimensional cosmological models it has been
conjectured that there is generic, chaotic oscillating behavior near the
initial singularity -- the Kasner parameters which characterize the asymptotic
form of the metric "jump" between different, locally constant values and
exhibit a never... | [
{
"created": "Fri, 16 Sep 2005 04:32:49 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Oct 2005 17:19:37 GMT",
"version": "v2"
},
{
"created": "Fri, 30 Dec 2005 01:22:46 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Ivashchuk",
"V. D.",
""
],
[
"Melnikov",
"V. N.",
""
],
[
"Singleton",
"D.",
""
]
] | In certain string inspired higher dimensional cosmological models it has been conjectured that there is generic, chaotic oscillating behavior near the initial singularity -- the Kasner parameters which characterize the asymptotic form of the metric "jump" between different, locally constant values and exhibit a never-e... |
gr-qc/9409045 | Tatsuhiko Koike | Tatsuhiko Koike and Takashi Mishima | An Analytic Model with Critical Behavior in Black Hole Formation | 21pp., ReVTeX, 7 figures (postscript, compressed and uuencoded),
TIT/HEP-266/COSMO-46 | Phys.Rev. D51 (1995) 4045-4053 | 10.1103/PhysRevD.51.4045 | null | gr-qc hep-th | null | A simple analytic model is presented which exhibits a critical behavior in
black hole formation, namely, collapse of a thin shell coupled with outgoing
null fluid. It is seen that the critical behavior is caused by the
gravitational nonlinearity near the event horizon. We calculate the value of
the critical exponent ... | [
{
"created": "Wed, 21 Sep 1994 08:37:57 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Sep 1994 21:35:25 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Koike",
"Tatsuhiko",
""
],
[
"Mishima",
"Takashi",
""
]
] | A simple analytic model is presented which exhibits a critical behavior in black hole formation, namely, collapse of a thin shell coupled with outgoing null fluid. It is seen that the critical behavior is caused by the gravitational nonlinearity near the event horizon. We calculate the value of the critical exponent an... |
0802.0112 | Olivier Piguet | Clisthenis P. Constantinidis, Jose Andre Lourenco, Ivan Morales,
Olivier Piguet and Alex Rios | Canonical Analysis of the Jackiw-Teitelboim Model in the Temporal Gauge.
I. The Classical Theory | 15 pages, Latex. Misprint corrections | Class.Quant.Grav.25:125003,2008 | 10.1088/0264-9381/25/12/125003 | null | gr-qc | null | As a preparation for its quantization in the loop formalism, the
2-dimensional gravitation model of Jackiw and Teitelboim is analysed in the
classical canonical formalism. The dynamics is of pure constraints as it is
well-known. A partial gauge fixing of the temporal type being performed, the
resulting second class c... | [
{
"created": "Fri, 1 Feb 2008 12:37:18 GMT",
"version": "v1"
},
{
"created": "Sun, 17 Feb 2008 23:51:31 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Constantinidis",
"Clisthenis P.",
""
],
[
"Lourenco",
"Jose Andre",
""
],
[
"Morales",
"Ivan",
""
],
[
"Piguet",
"Olivier",
""
],
[
"Rios",
"Alex",
""
]
] | As a preparation for its quantization in the loop formalism, the 2-dimensional gravitation model of Jackiw and Teitelboim is analysed in the classical canonical formalism. The dynamics is of pure constraints as it is well-known. A partial gauge fixing of the temporal type being performed, the resulting second class con... |
1909.13629 | Ming Zhang | Ming Zhang | Information paradox and corrected thermodynamics for black holes | 7 pages | Phys.Lett. B799 (2019) 135063 | 10.1016/j.physletb.2019.135063 | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | We generally consider that entropy and temperature of a spherically symmetric
black hole are corrected by quantum effect. We calculate interior entropy
variation of massless scalar field and compare it with corrected
Bekenstein-Hawking entropy variation for the evaporating black hole. We find
that the corrected ratio... | [
{
"created": "Mon, 30 Sep 2019 12:35:48 GMT",
"version": "v1"
}
] | 2019-12-10 | [
[
"Zhang",
"Ming",
""
]
] | We generally consider that entropy and temperature of a spherically symmetric black hole are corrected by quantum effect. We calculate interior entropy variation of massless scalar field and compare it with corrected Bekenstein-Hawking entropy variation for the evaporating black hole. We find that the corrected ratio b... |
1504.07204 | Pedro Moraes | J. R. L. Santos and P. H. R. S. Moraes | Fast-roll solutions from two scalar fields inflation | 8 pages, 8 figures, new updates | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One common approach for cosmic inflation consists in couple Einstein's
gravity with a scalar field, often referred to inflaton field. In order to
derive analytic simple scenarios, we usually work in the {\it slow-roll}
regime. In such an approximation one considers the scalar field potentials to
be nearly flat. It is... | [
{
"created": "Mon, 27 Apr 2015 18:49:19 GMT",
"version": "v1"
},
{
"created": "Sat, 5 Dec 2020 19:04:46 GMT",
"version": "v2"
}
] | 2021-01-01 | [
[
"Santos",
"J. R. L.",
""
],
[
"Moraes",
"P. H. R. S.",
""
]
] | One common approach for cosmic inflation consists in couple Einstein's gravity with a scalar field, often referred to inflaton field. In order to derive analytic simple scenarios, we usually work in the {\it slow-roll} regime. In such an approximation one considers the scalar field potentials to be nearly flat. It is p... |
gr-qc/0402075 | I.-chin Wang | I.-Chin Wang | Dust and Radiation Quantum Perfect Fluid Cosmology : Selection of Time
Variable | 5 pages, revtex4 type | Gen.Rel.Grav. 37 (2005) 971-976 | 10.1007/s10714-005-0080-5 | null | gr-qc | null | We studied the expectation value of the scale factor in radiation and dust
quantum perfect fluid cosmology. We used Schutz variational formalism to
describe perfect fluid and selected the conjugate coordinate of perfect fluid
be dynamical variable. After quantization and solving the Wheeler-DeWitt
equation can obtain... | [
{
"created": "Mon, 16 Feb 2004 12:46:28 GMT",
"version": "v1"
},
{
"created": "Thu, 20 May 2004 03:55:52 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Wang",
"I. -Chin",
""
]
] | We studied the expectation value of the scale factor in radiation and dust quantum perfect fluid cosmology. We used Schutz variational formalism to describe perfect fluid and selected the conjugate coordinate of perfect fluid be dynamical variable. After quantization and solving the Wheeler-DeWitt equation can obtain t... |
2111.09495 | Georgios Mavrogiannis | Georgios Mavrogiannis | Quasilinear wave equations on Schwarzschild-de Sitter | 40 pages, 2 figures | null | null | null | gr-qc math-ph math.AP math.MP | http://creativecommons.org/licenses/by/4.0/ | We give an elementary new argument for global existence and exponential decay
of solutions of quasilinear wave equations on Schwarzschild-de Sitter black
hole backgrounds, for appropriately small initial data. The core of the
argument is entirely local, based on time translation invariant energy
estimates in spacetim... | [
{
"created": "Thu, 18 Nov 2021 03:10:50 GMT",
"version": "v1"
}
] | 2021-11-19 | [
[
"Mavrogiannis",
"Georgios",
""
]
] | We give an elementary new argument for global existence and exponential decay of solutions of quasilinear wave equations on Schwarzschild-de Sitter black hole backgrounds, for appropriately small initial data. The core of the argument is entirely local, based on time translation invariant energy estimates in spacetime ... |
1609.05933 | Eliu Huerta | E. A. Huerta, Prayush Kumar, Bhanu Agarwal, Daniel George, Hsi-Yu
Schive, Harald P. Pfeiffer, Roland Haas, Wei Ren, Tony Chu, Michael Boyle,
Daniel A. Hemberger, Lawrence E. Kidder, Mark A. Scheel and Bela Szilagyi | Complete waveform model for compact binaries on eccentric orbits | 31 pages, 19 figures, 3 appendices. Submitted to Phys Rev D. v2:
direct comparison to eccentric numerical relativity simulations, not used for
calibration of the model, included. References added. Accepted to Phys Rev D | Phys. Rev. D 95, 024038 (2017) | 10.1103/PhysRevD.95.024038 | null | gr-qc astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a time domain waveform model that describes the
inspiral-merger-ringdown (IMR) of compact binary systems whose components are
non-spinning, and which evolve on orbits with low to moderate eccentricity. The
inspiral evolution is described using third order post-Newtonian equations both
for the equations of ... | [
{
"created": "Mon, 19 Sep 2016 20:44:41 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Feb 2017 22:48:05 GMT",
"version": "v2"
}
] | 2017-02-03 | [
[
"Huerta",
"E. A.",
""
],
[
"Kumar",
"Prayush",
""
],
[
"Agarwal",
"Bhanu",
""
],
[
"George",
"Daniel",
""
],
[
"Schive",
"Hsi-Yu",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Haas",
"Roland",
""
],
[
... | We present a time domain waveform model that describes the inspiral-merger-ringdown (IMR) of compact binary systems whose components are non-spinning, and which evolve on orbits with low to moderate eccentricity. The inspiral evolution is described using third order post-Newtonian equations both for the equations of mo... |
2010.05126 | John Westernacher-Schneider | John Ryan Westernacher-Schneider | Extremely High-Order Convergence in Simulations of Relativistic Stars | Pdf ~1 Mb. 13 page body, 2 pages of appendices. Video content
available at https://youtu.be/rBpz-aVNSLo . v2: added references and
footnote, minor style change | null | 10.1088/1361-6382/ac0234 | null | gr-qc astro-ph.HE physics.comp-ph physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a road towards obtaining gravitational waveforms from inspiraling
material binaries with an accuracy viable for third-generation gravitational
wave detectors, without necessarily advancing computational hardware or
massively-parallel software infrastructure. We demonstrate a proof-of-principle
1+1-dimensio... | [
{
"created": "Sun, 11 Oct 2020 01:10:36 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jan 2021 03:54:27 GMT",
"version": "v2"
}
] | 2021-07-07 | [
[
"Westernacher-Schneider",
"John Ryan",
""
]
] | We provide a road towards obtaining gravitational waveforms from inspiraling material binaries with an accuracy viable for third-generation gravitational wave detectors, without necessarily advancing computational hardware or massively-parallel software infrastructure. We demonstrate a proof-of-principle 1+1-dimensiona... |
2012.13788 | Serge Repin Mr. | I. D. Novikov, D. I. Novikov, S. V. Repin | Disintegration and expansion of wormholes | null | Phys. Rev. D, vol. 102, issue 12, article id. 124073 (2020) | 10.1103/PhysRevD.102.124073 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider the process of catastrophic expansion of a spacelike wormhole
after a violation of its equilibrium state. The dynamics of deformation of the
comoving reference frame is investigated. We show that the deformation has a
very specific anisotropic feature. The statement made earlier by other authors,
that in ... | [
{
"created": "Sat, 26 Dec 2020 17:47:42 GMT",
"version": "v1"
}
] | 2021-06-08 | [
[
"Novikov",
"I. D.",
""
],
[
"Novikov",
"D. I.",
""
],
[
"Repin",
"S. V.",
""
]
] | We consider the process of catastrophic expansion of a spacelike wormhole after a violation of its equilibrium state. The dynamics of deformation of the comoving reference frame is investigated. We show that the deformation has a very specific anisotropic feature. The statement made earlier by other authors, that in th... |
gr-qc/9411025 | Mark Scheel | Mark A. Scheel, Stuart L. Shapiro, and Saul A. Teukolsky | Collapse to Black Holes in Brans-Dicke Theory: I. Horizon Boundary
Conditions for Dynamical Spacetimes | 46 pages including figures, uuencoded gz-compressed postscript,
Submitted to Phys Rev D | Phys.Rev. D51 (1995) 4208-4235 | 10.1103/PhysRevD.51.4208 | CRSR-1085 | gr-qc | null | We present a new numerical code that evolves a spherically symmetric
configuration of collisionless matter in the Brans-Dicke theory of gravitation.
In this theory the spacetime is dynamical even in spherical symmetry, where it
can contain gravitational radiation. Our code is capable of accurately tracking
collapse t... | [
{
"created": "Thu, 10 Nov 1994 14:22:53 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Scheel",
"Mark A.",
""
],
[
"Shapiro",
"Stuart L.",
""
],
[
"Teukolsky",
"Saul A.",
""
]
] | We present a new numerical code that evolves a spherically symmetric configuration of collisionless matter in the Brans-Dicke theory of gravitation. In this theory the spacetime is dynamical even in spherical symmetry, where it can contain gravitational radiation. Our code is capable of accurately tracking collapse to ... |
gr-qc/9811020 | Garcia | L.C.Garcia de Andrade | Distributional Torsion of Cosmic Walls crossed by Cosmic Strings | 6 pages Latex | null | null | null | gr-qc | null | Distributional sources of cosmic walls crossed by cosmic strings from
Riemann-Cartan (RC) Geometry. The matter density of the planar wall is maximum
at the point where the cosmic string crosses the cosmic wall. Cartan torsion is
has a support on the cosmic string given by the Dirac $ \delta $-function. Off
the source... | [
{
"created": "Fri, 6 Nov 1998 03:58:10 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Andrade",
"L. C. Garcia",
""
]
] | Distributional sources of cosmic walls crossed by cosmic strings from Riemann-Cartan (RC) Geometry. The matter density of the planar wall is maximum at the point where the cosmic string crosses the cosmic wall. Cartan torsion is has a support on the cosmic string given by the Dirac $ \delta $-function. Off the sources ... |
1607.03441 | Rafael Nunes | Rafael C. Nunes | Gravitationally induced particle production and its impact on structure
formation | 14 pages, 12 figures, Published version in General Relativity and
Gravitation. arXiv admin note: text overlap with arXiv:1503.04113; text
overlap with arXiv:1204.3789, arXiv:astro-ph/0308118 by other authors | Gen. Rel. Grav. 48 (2016) 107 | 10.1007/s10714-016-2104-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we investigate the influence of a continuous particles creation
processes on the linear and nonlinear matter clustering, and its consequences
on the weak lensing effect induced by structure formation. We study the line of
sight behavior of the contribution to the bispectrum signal at a given angular
mul... | [
{
"created": "Tue, 12 Jul 2016 17:14:39 GMT",
"version": "v1"
}
] | 2016-07-13 | [
[
"Nunes",
"Rafael C.",
""
]
] | In this paper we investigate the influence of a continuous particles creation processes on the linear and nonlinear matter clustering, and its consequences on the weak lensing effect induced by structure formation. We study the line of sight behavior of the contribution to the bispectrum signal at a given angular multi... |
2109.13544 | Vyacheslav Dokuchaev | Victor A. Berezin and Vyacheslav I. Dokuchaev | Supervisor of the Universe | 7 pages, published version of the invited paper for the Special Issue
"Light on Dark Worlds - A Themed Issue in Honor of Professor Maxim Yu.
Khlopov on the Occasion of His 70th Birthday" | Physics 2021, 3(4), 814-820 | 10.3390/physics3040051 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, conformal invariant gravitation, based on Weyl geometry, is
considered. In addition to the gravitational and matter action integrals, the
interaction between the Weyl vector (entered in Weyl geometry) and the vector,
representing the world line of the independent observer, are introduced. It is
shown t... | [
{
"created": "Tue, 28 Sep 2021 07:56:37 GMT",
"version": "v1"
}
] | 2021-09-29 | [
[
"Berezin",
"Victor A.",
""
],
[
"Dokuchaev",
"Vyacheslav I.",
""
]
] | In this paper, conformal invariant gravitation, based on Weyl geometry, is considered. In addition to the gravitational and matter action integrals, the interaction between the Weyl vector (entered in Weyl geometry) and the vector, representing the world line of the independent observer, are introduced. It is shown tha... |
gr-qc/9901041 | Linux User Rhs | O. Bertolami and D.F. Mota | Seed Magnetic Fields from the Breaking of Lorentz Invariance | 6 pages, plain Latex (requires mprocl.sty file available at
http://www.indiana.edu/~cpt98/proceedings.html). Talk delivered by O.B. at
the Meeting on CPT and Lorentz Symmetry, Bloomington, USA, November 1998 | null | null | null | gr-qc astro-ph hep-ph | null | Spontaneous breaking of Lorentz invariance may take place in string theories,
possibly endowing the photon with a mass. This leads to the breaking of the
conformal symmetry of the electromagnetic action allowing for the generation
within inflationary scenarios of magnetic fields over $Mpc$ scales. We show
that the ge... | [
{
"created": "Thu, 14 Jan 1999 15:06:30 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bertolami",
"O.",
""
],
[
"Mota",
"D. F.",
""
]
] | Spontaneous breaking of Lorentz invariance may take place in string theories, possibly endowing the photon with a mass. This leads to the breaking of the conformal symmetry of the electromagnetic action allowing for the generation within inflationary scenarios of magnetic fields over $Mpc$ scales. We show that the gene... |
1707.07612 | Brien C. Nolan | Brien C. Nolan | Local properties and global structure of McVittie spacetimes with
non-flat FLRW backgrounds | 46 + 4 pages, 7 figures | null | 10.1088/1361-6382/aa903c | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | McVittie spacetimes embed the vacuum Schwarzschild(-(anti) de Sitter)
spacetime in an isotropic FLRW background universe. We study the global
structure of McVittie spacetimes with spatially non-flat FLRW backgrounds. This
requires the extension of the definition of such spacetimes, previously given
only for the flat ... | [
{
"created": "Mon, 24 Jul 2017 15:49:11 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Oct 2017 11:03:15 GMT",
"version": "v2"
}
] | 2017-11-22 | [
[
"Nolan",
"Brien C.",
""
]
] | McVittie spacetimes embed the vacuum Schwarzschild(-(anti) de Sitter) spacetime in an isotropic FLRW background universe. We study the global structure of McVittie spacetimes with spatially non-flat FLRW backgrounds. This requires the extension of the definition of such spacetimes, previously given only for the flat an... |
2106.05812 | Shreyansh Shankar Dave | Shreyansh S. Dave and Sanatan Digal | Field excitation in fuzzy dark matter near a strong gravitational wave
source | 11 pages, 5 figures | Phys. Rev. D 105, 024039 (2022) | 10.1103/PhysRevD.105.024039 | null | gr-qc astro-ph.HE hep-ph hep-th nucl-th | http://creativecommons.org/licenses/by/4.0/ | The axion-like particles with ultralight mass ($\sim10^{-22}$eV) can be a
possible candidate of dark matter, known as the fuzzy dark matter (FDM). These
particles form Bose-Einstein condensate in the early Universe which can explain
the dark matter density distribution in galaxies at the present time. We study
the ti... | [
{
"created": "Thu, 10 Jun 2021 15:29:23 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Nov 2021 12:20:34 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Jan 2022 17:38:47 GMT",
"version": "v3"
}
] | 2022-01-14 | [
[
"Dave",
"Shreyansh S.",
""
],
[
"Digal",
"Sanatan",
""
]
] | The axion-like particles with ultralight mass ($\sim10^{-22}$eV) can be a possible candidate of dark matter, known as the fuzzy dark matter (FDM). These particles form Bose-Einstein condensate in the early Universe which can explain the dark matter density distribution in galaxies at the present time. We study the time... |
2002.05012 | Jorge Delgado B.S. | Jorge F. M. Delgado, Carlos A. R. Herdeiro, Eugen Radu | Spinning black holes in shift-symmetric Horndeski theory | 29 pages, 8 figures | null | 10.1007/JHEP04(2020)180 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct spinning black holes (BHs) in shift-symmetric Horndeski theory.
This is an Einstein-scalar-Gauss-Bonnet model wherein the (real) scalar field
couples linearly to the Gauss-Bonnet curvature squared combination. The BH
solutions constructed are stationary, axially symmetric and asymptotically
flat. They po... | [
{
"created": "Wed, 12 Feb 2020 14:21:04 GMT",
"version": "v1"
}
] | 2020-05-20 | [
[
"Delgado",
"Jorge F. M.",
""
],
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Radu",
"Eugen",
""
]
] | We construct spinning black holes (BHs) in shift-symmetric Horndeski theory. This is an Einstein-scalar-Gauss-Bonnet model wherein the (real) scalar field couples linearly to the Gauss-Bonnet curvature squared combination. The BH solutions constructed are stationary, axially symmetric and asymptotically flat. They poss... |
2103.15040 | Leonardo Balart | Leonardo Balart, Sharmanthie Fernando | Thermodynamics and Heat Engines of Black Holes with Born-Infeld-type
Electrodynamics | 17 pages, 7 figures | Mod.Phys.Lett.A 36 (2021) 15, 2150102 | 10.1142/S0217732321501029 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper we have studied electrically charged black holes in a new model
of nonlinear electrodynamics introduced by Kruglov in Ref. [1]. There are two
parameters for the theory and the black hole could have up to two horizons.
Thermodynamics is studied in the extended phase space where the pressure is
proportion... | [
{
"created": "Sun, 28 Mar 2021 04:04:23 GMT",
"version": "v1"
}
] | 2021-10-19 | [
[
"Balart",
"Leonardo",
""
],
[
"Fernando",
"Sharmanthie",
""
]
] | In this paper we have studied electrically charged black holes in a new model of nonlinear electrodynamics introduced by Kruglov in Ref. [1]. There are two parameters for the theory and the black hole could have up to two horizons. Thermodynamics is studied in the extended phase space where the pressure is proportional... |
1009.1791 | Laura Nuttall | Laura K Nuttall, Patrick J Sutton | Identifying the Host Galaxy of Gravitational Wave Signals | 5 pages, 2 figures | Phys.Rev.D82:102002,2010 | 10.1103/PhysRevD.82.102002 | LIGO-P1000087-v3 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the goals of the current LIGO-GEO-Virgo science run is to identify
transient gravitational wave (GW) signals in near real time to allow follow-up
electromagnetic (EM) observations. An EM counterpart could increase the
confidence of the GW detection and provide insight into the nature of the
source. Current GW-... | [
{
"created": "Thu, 9 Sep 2010 14:21:32 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Oct 2010 13:28:05 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Nov 2011 15:40:41 GMT",
"version": "v3"
}
] | 2011-11-30 | [
[
"Nuttall",
"Laura K",
""
],
[
"Sutton",
"Patrick J",
""
]
] | One of the goals of the current LIGO-GEO-Virgo science run is to identify transient gravitational wave (GW) signals in near real time to allow follow-up electromagnetic (EM) observations. An EM counterpart could increase the confidence of the GW detection and provide insight into the nature of the source. Current GW-EM... |
gr-qc/9908038 | Steven L. Liebling | Dieter Maison and Steven L. Liebling | Some Remarks on Gravitational Global Monopoles | 9 pages, 5 figures | Phys.Rev.Lett. 83 (1999) 5218-5221 | 10.1103/PhysRevLett.83.5218 | MPI-PhT/99-31 | gr-qc | null | Using mainly analytical arguments, we derive the exact relation
$\eta_{max}=\sqrt{3/8\pi}$ for the maximal vacuum value of the Higgs field for
static gravitational global monopoles. For this value, the global monopole
bifurcates with the de Sitter solution obtained for vanishing Higgs field. In
addition, we analyze t... | [
{
"created": "Wed, 11 Aug 1999 20:11:01 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Maison",
"Dieter",
""
],
[
"Liebling",
"Steven L.",
""
]
] | Using mainly analytical arguments, we derive the exact relation $\eta_{max}=\sqrt{3/8\pi}$ for the maximal vacuum value of the Higgs field for static gravitational global monopoles. For this value, the global monopole bifurcates with the de Sitter solution obtained for vanishing Higgs field. In addition, we analyze the... |
gr-qc/0701136 | Wen Zhao | Wen Zhao, Donghui Xu | Evolution of magnetic component in Yang-Mills condensate dark energy
models | 12 pages, 4 figures, minor typos corrected | Int.J.Mod.Phys.D16:1735-1744,2007 | 10.1142/S0218271807011048 | Int.J.Mod.Phys.D 16 (2007) 1735-1744 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The evolution of the electric and magnetic components in an effective
Yang-Mills condensate dark energy model is investigated. If the electric field
is dominant, the magnetic component disappears with the expansion of the
Universe. The total YM condensate tracks the radiation in the earlier Universe,
and later it bec... | [
{
"created": "Thu, 25 Jan 2007 02:27:24 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Jan 2007 01:45:14 GMT",
"version": "v2"
},
{
"created": "Sun, 15 Apr 2007 00:29:35 GMT",
"version": "v3"
},
{
"created": "Fri, 15 Jun 2007 00:45:21 GMT",
"version": "v4"
},
{
"c... | 2009-04-10 | [
[
"Zhao",
"Wen",
""
],
[
"Xu",
"Donghui",
""
]
] | The evolution of the electric and magnetic components in an effective Yang-Mills condensate dark energy model is investigated. If the electric field is dominant, the magnetic component disappears with the expansion of the Universe. The total YM condensate tracks the radiation in the earlier Universe, and later it becom... |
1706.05035 | John W. Moffat | J. W. Moffat | Misaligned Spin Merging Black Holes in Modified Gravity (MOG) | 4 pages, no figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A promising signature of coalescing black holes is their spin angular
distribution. We consider the aLIGO collaboration gravitational wave
measurements of the binary black hole spins and the predicted modified gravity
(MOG) preference for misaligned spins of the coalescing black holes. In MOG,
during the merger of tw... | [
{
"created": "Thu, 15 Jun 2017 18:38:06 GMT",
"version": "v1"
}
] | 2017-06-19 | [
[
"Moffat",
"J. W.",
""
]
] | A promising signature of coalescing black holes is their spin angular distribution. We consider the aLIGO collaboration gravitational wave measurements of the binary black hole spins and the predicted modified gravity (MOG) preference for misaligned spins of the coalescing black holes. In MOG, during the merger of two ... |
1310.6252 | Peter Kazinski | P.O. Kazinski | Comment on "Quantum versus classical instability of scalar fields in
curved backgrounds" | 5 pp | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I show that the claim of the paper [arXiv:1310.2185] on the absence of
instability for a minimally coupled scalar field on a static spherically
symmetric gravitational background is incorrect.
| [
{
"created": "Wed, 23 Oct 2013 15:07:22 GMT",
"version": "v1"
}
] | 2013-10-24 | [
[
"Kazinski",
"P. O.",
""
]
] | I show that the claim of the paper [arXiv:1310.2185] on the absence of instability for a minimally coupled scalar field on a static spherically symmetric gravitational background is incorrect. |
gr-qc/0112005 | Sascha Husa | Sascha Husa | Semiglobal Numerical Calculations of Asymptotically Minkowski Spacetimes | 6 pages, published in "Relativistic Astrophysics: 20th Texas
Symposium", ed. by J. Craig Wheeler and Hugo Martel, AIP Conference
Proceedings 586 (Austin, Texas, 10-15 Dec. 2000) | null | 10.1063/1.1419646 | null | gr-qc | null | This talk reports on recent progress toward the semiglobal study of
asymptotically flat spacetimes within numerical relativity. The development of
a 3D solver for asymptotically Minkowski-like hyperboloidal initial data has
rendered possible the application of Friedrich's conformal field equations to
astrophysically ... | [
{
"created": "Thu, 6 Dec 2001 16:52:42 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Husa",
"Sascha",
""
]
] | This talk reports on recent progress toward the semiglobal study of asymptotically flat spacetimes within numerical relativity. The development of a 3D solver for asymptotically Minkowski-like hyperboloidal initial data has rendered possible the application of Friedrich's conformal field equations to astrophysically in... |
0808.2284 | Shinji Tsujikawa | Takashi Tamaki, Shinji Tsujikawa | Revisiting chameleon gravity - thin-shells and no-shells with
appropriate boundary conditions | 14 pages, no figures | Phys.Rev.D78:084028,2008 | 10.1103/PhysRevD.78.084028 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive analytic solutions of a chameleon scalar field $\phi$ that couples
to a non-relativistic matter in the weak gravitational background of a
spherically symmetric body, paying particular attention to a field mass $m_A$
inside of the body. The standard thin-shell field profile is recovered by
taking the limit $... | [
{
"created": "Sun, 17 Aug 2008 07:25:53 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Tamaki",
"Takashi",
""
],
[
"Tsujikawa",
"Shinji",
""
]
] | We derive analytic solutions of a chameleon scalar field $\phi$ that couples to a non-relativistic matter in the weak gravitational background of a spherically symmetric body, paying particular attention to a field mass $m_A$ inside of the body. The standard thin-shell field profile is recovered by taking the limit $m_... |
2209.07978 | Betti Hartmann | Y. Brihaye (University of Mons, Belgium), F. Console (University of
S\~ao Paulo, Brazil), B. Hartmann (University College London, UK) | Charged and radially excited boson stars (in Anti-de Sitter) | null | null | 10.1103/PhysRevD.106.104058 | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We study charged and radially excited boson stars in both asymptotically flat
as well as asymptotically Anti-de Sitter space-time. We demonstrate that two
different types of radially excited solutions exist~: one that persists in the
linear limit of small scalar fields, in which analytical arguments suggest the
exist... | [
{
"created": "Fri, 16 Sep 2022 14:44:18 GMT",
"version": "v1"
}
] | 2022-12-07 | [
[
"Brihaye",
"Y.",
"",
"University of Mons, Belgium"
],
[
"Console",
"F.",
"",
"University of\n São Paulo, Brazil"
],
[
"Hartmann",
"B.",
"",
"University College London, UK"
]
] | We study charged and radially excited boson stars in both asymptotically flat as well as asymptotically Anti-de Sitter space-time. We demonstrate that two different types of radially excited solutions exist~: one that persists in the linear limit of small scalar fields, in which analytical arguments suggest the existen... |
1401.6662 | Sergey Kozyrev | Sergey M. Kozyrev | Stability of composite vacuum Heckmann wormholes in Brans-Dicke theory | 13 pages. arXiv admin note: substantial text overlap with
arXiv:1109.2273 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper discusses linearized (spherically symmetric) perturbation of
static Heckmann composite thin shell wormholes in Brans-Dicke gravity. The
equation of state $P= \beta^2 \sigma$ at the throat is linearized around the
static solution where $\sigma$ energy density of the shell and $P$ the presume.
We have shown ... | [
{
"created": "Sun, 26 Jan 2014 16:03:50 GMT",
"version": "v1"
}
] | 2014-01-28 | [
[
"Kozyrev",
"Sergey M.",
""
]
] | This paper discusses linearized (spherically symmetric) perturbation of static Heckmann composite thin shell wormholes in Brans-Dicke gravity. The equation of state $P= \beta^2 \sigma$ at the throat is linearized around the static solution where $\sigma$ energy density of the shell and $P$ the presume. We have shown th... |
1412.4801 | Alex Va\~n\'o-Vi\~nuales | Alex Va\~n\'o-Vi\~nuales and Sascha Husa | Unconstrained hyperboloidal evolution of black holes in spherical
symmetry with GBSSN and Z4c | 6 pages, 5 figures | null | 10.1088/1742-6596/600/1/012061 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider unconstrained evolution schemes for the hyperboloidal initial
value problem in numerical relativity as a promising candidate for the
optimally efficient numerical treatment of radiating compact objects. Here,
spherical symmetry already poses nontrivial problems and constitutes an
important first step to r... | [
{
"created": "Mon, 15 Dec 2014 21:07:26 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Vañó-Viñuales",
"Alex",
""
],
[
"Husa",
"Sascha",
""
]
] | We consider unconstrained evolution schemes for the hyperboloidal initial value problem in numerical relativity as a promising candidate for the optimally efficient numerical treatment of radiating compact objects. Here, spherical symmetry already poses nontrivial problems and constitutes an important first step to reg... |
gr-qc/9802016 | null | Vladimir S. Mashkevich (Institute of Physics, Kiev) | Indeterministic Quantum Gravity and Cosmology IX. Nonreality of
Many-Place Gravitational Autolocalization: Why a Ball Is Not Located in
Different Places at Once | 5 pages, LATEX 2.09 | null | null | IP 2/98 | gr-qc quant-ph | null | This paper is a sequel to the series of papers [gr-qc/9409010, gr-qc/9505034,
gr-qc/9603022, gr-qc/9609035, gr-qc/9609046, gr-qc/9704033, gr-qc/9704038,
gr-qc/9708014], being an immediate continuation and supplement to the last of
them, where gravitational autolocalization of a body has been considered. A
resulting s... | [
{
"created": "Sun, 8 Feb 1998 10:19:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mashkevich",
"Vladimir S.",
"",
"Institute of Physics, Kiev"
]
] | This paper is a sequel to the series of papers [gr-qc/9409010, gr-qc/9505034, gr-qc/9603022, gr-qc/9609035, gr-qc/9609046, gr-qc/9704033, gr-qc/9704038, gr-qc/9708014], being an immediate continuation and supplement to the last of them, where gravitational autolocalization of a body has been considered. A resulting sol... |
1111.1879 | Benjamin Bahr | Benjamin Bahr, Rodolfo Gambini, Jorge Pullin | Discretisations, Constraints and Diffeomorphisms in Quantum Gravity | Contribution for a special issue of SIGMA on Loop Quantum Gravity and
Cosmology | SIGMA 8 (2012), 002, 29 pages | 10.3842/SIGMA.2012.002 | null | gr-qc hep-lat hep-th | http://creativecommons.org/licenses/by-nc-sa/3.0/ | In this review we discuss the interplay between discretization, constraint
implementation, and diffeomorphism symmetry in Loop Quantum Gravity and Spin
Foam models. To this end we review the Consistent Discretizations approach,
which is an application of the master constraint program to construct the
physical Hilbert... | [
{
"created": "Tue, 8 Nov 2011 12:05:25 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Jan 2012 08:56:36 GMT",
"version": "v2"
}
] | 2012-01-10 | [
[
"Bahr",
"Benjamin",
""
],
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | In this review we discuss the interplay between discretization, constraint implementation, and diffeomorphism symmetry in Loop Quantum Gravity and Spin Foam models. To this end we review the Consistent Discretizations approach, which is an application of the master constraint program to construct the physical Hilbert s... |
2212.07130 | Vitalii Vertogradov | Vitalii Vertogradov, Dmitriy Kudryavcev | Generalized Vaidya spacetime: horizons, conformal symmetries, surface
gravity and diagonalization | 21 pages, submitted to theoretical and mathematical physics | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper the different properties of generalized Vaidya spacetime are
considered. We located and compared different types of horizons. We show that
the apparent horizon can contain the event horizon. The locations of all types
of horizons are compared with ones in usual Vaidya spacetime. Also, we consider
the co... | [
{
"created": "Wed, 14 Dec 2022 09:36:24 GMT",
"version": "v1"
}
] | 2022-12-15 | [
[
"Vertogradov",
"Vitalii",
""
],
[
"Kudryavcev",
"Dmitriy",
""
]
] | In this paper the different properties of generalized Vaidya spacetime are considered. We located and compared different types of horizons. We show that the apparent horizon can contain the event horizon. The locations of all types of horizons are compared with ones in usual Vaidya spacetime. Also, we consider the conf... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.