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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0106071 | Robert M. Wald | Sijie Gao and Robert M. Wald | The "physical process" version of the first law and the generalized
second law for charged and rotating black holes | 35 pages; 1 eps figure | Phys.Rev. D64 (2001) 084020 | 10.1103/PhysRevD.64.084020 | null | gr-qc | null | We investigate both the ``physical process'' version of the first law and the
second law of black hole thermodynamics for charged and rotating black holes.
We begin by deriving general formulas for the first order variation in ADM mass
and angular momentum for linear perturbations off a stationary, electrovac
backgro... | [
{
"created": "Thu, 21 Jun 2001 17:49:26 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Gao",
"Sijie",
""
],
[
"Wald",
"Robert M.",
""
]
] | We investigate both the ``physical process'' version of the first law and the second law of black hole thermodynamics for charged and rotating black holes. We begin by deriving general formulas for the first order variation in ADM mass and angular momentum for linear perturbations off a stationary, electrovac backgroun... |
gr-qc/0005074 | Scott M. Hitchcock | Scott Hitchcock | Feynman Clocks, Causal Networks, and The Origin of Hierarchical 'Arrows
of Time' in Complex Systems. Part 1: 'Conjectures' | 53 Pages, No Figures, corrected equations and revised content | null | null | MSUCL-1135 | gr-qc | null | A theory of time as 'information' is outlined using new tools such as Feynman
Clocks (FCs), Collective Excitation Networks (CENs), Sequential Excitation
Networks (SENs), and Plateaus of Complexity (POCs). Applications of this
approach range from the Big Bang to the emergence of 'consciousness'.
| [
{
"created": "Tue, 16 May 2000 23:22:16 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Feb 2001 02:12:10 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Hitchcock",
"Scott",
""
]
] | A theory of time as 'information' is outlined using new tools such as Feynman Clocks (FCs), Collective Excitation Networks (CENs), Sequential Excitation Networks (SENs), and Plateaus of Complexity (POCs). Applications of this approach range from the Big Bang to the emergence of 'consciousness'. |
2112.11738 | Luk\'a\v{s} Polcar | Luk\'a\v{s} Polcar and Otakar Sv\'itek | Phantom scalar field counterpart to Curzon-Chazy spacetime | null | Classical and Quantum Gravity 39 (2022) 185002 | 10.1088/1361-6382/ac8267 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive and analyze phantom scalar field counterpart to Curzon-Chazy
spacetime. Such solution contains wormhole throat while the region inside the
throat behaves like a one-directional time machine. We describe its conformal
structure and non-scalar singularity hidden inside the wormhole. We examine the
results pro... | [
{
"created": "Wed, 22 Dec 2021 09:07:03 GMT",
"version": "v1"
},
{
"created": "Mon, 16 May 2022 20:41:35 GMT",
"version": "v2"
},
{
"created": "Mon, 22 Aug 2022 16:18:46 GMT",
"version": "v3"
}
] | 2022-08-23 | [
[
"Polcar",
"Lukáš",
""
],
[
"Svítek",
"Otakar",
""
]
] | We derive and analyze phantom scalar field counterpart to Curzon-Chazy spacetime. Such solution contains wormhole throat while the region inside the throat behaves like a one-directional time machine. We describe its conformal structure and non-scalar singularity hidden inside the wormhole. We examine the results provi... |
1209.5358 | T.G Zlosnik | H. F. Westman, T. G. Zlosnik | Cartan gravity, matter fields, and the gauge principle | Updated to match content of published version | null | 10.1016/j.aop.2013.03.012 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravity is commonly thought of as one of the four force fields in nature.
However, in standard formulations its mathematical structure is rather
different from the Yang-Mills fields of particle physics that govern the
electromagnetic, weak, and strong interactions. This paper explores this
dissonance with particular ... | [
{
"created": "Mon, 24 Sep 2012 18:33:26 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Apr 2013 06:28:39 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Westman",
"H. F.",
""
],
[
"Zlosnik",
"T. G.",
""
]
] | Gravity is commonly thought of as one of the four force fields in nature. However, in standard formulations its mathematical structure is rather different from the Yang-Mills fields of particle physics that govern the electromagnetic, weak, and strong interactions. This paper explores this dissonance with particular fo... |
2305.17171 | Thomas W. Baumgarte | Thomas W. Baumgarte, Bernd Br\"ugmann, Daniela Cors, Carsten Gundlach,
David Hilditch, Anton Khirnov, Tom\'a\v{s} Ledvinka, Sarah Renkhoff, and
Isabel Su\'arez Fern\'andez | Critical phenomena in the collapse of gravitational waves | 6 pages, 3 figures | Phys. Rev. Lett. 131, 181401 (2023) | 10.1103/PhysRevLett.131.181401 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Fine-tuning generic but smooth spherically-symmetric initial data for general
relativity to the threshold of dynamical black hole formation creates
arbitrarily large curvatures, mediated by a universal self-similar solution
that acts as an intermediate attractor. For vacuum gravitational waves,
however, these critica... | [
{
"created": "Fri, 26 May 2023 18:00:09 GMT",
"version": "v1"
}
] | 2024-06-26 | [
[
"Baumgarte",
"Thomas W.",
""
],
[
"Brügmann",
"Bernd",
""
],
[
"Cors",
"Daniela",
""
],
[
"Gundlach",
"Carsten",
""
],
[
"Hilditch",
"David",
""
],
[
"Khirnov",
"Anton",
""
],
[
"Ledvinka",
"Tomáš",
""
],... | Fine-tuning generic but smooth spherically-symmetric initial data for general relativity to the threshold of dynamical black hole formation creates arbitrarily large curvatures, mediated by a universal self-similar solution that acts as an intermediate attractor. For vacuum gravitational waves, however, these critical ... |
1312.7652 | Baocheng Zhang | Biao Tang, Baocheng Zhang, Lin Zhou, Jin Wang, and Mingsheng Zhan | Configurations of a new atomic interferometer for gravitational wave
detection | null | RAA 15,333-347 (2015) | 10.1088/1674-4527/15/3/004 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, the configuration using atomic interferometers (AIs) had been
suggested for the detection of gravitational waves. A new AI with some
additional laser pulses for implementing large momentum transfer was also put
forward, in order to improve the influence of shot noise and laser frequency
noise. In the paper,... | [
{
"created": "Mon, 30 Dec 2013 08:54:23 GMT",
"version": "v1"
}
] | 2015-10-20 | [
[
"Tang",
"Biao",
""
],
[
"Zhang",
"Baocheng",
""
],
[
"Zhou",
"Lin",
""
],
[
"Wang",
"Jin",
""
],
[
"Zhan",
"Mingsheng",
""
]
] | Recently, the configuration using atomic interferometers (AIs) had been suggested for the detection of gravitational waves. A new AI with some additional laser pulses for implementing large momentum transfer was also put forward, in order to improve the influence of shot noise and laser frequency noise. In the paper, w... |
1610.06040 | Ezequiel Boero | Ezequiel F. Boero, Osvaldo M. Moreschi | Practical definition of averages of tensors in general relativity | 10 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a definition of tensor fields which are average of tensors over a
manifold, with a straightforward and natural definition of derivative for the
averaged fields; which in turn makes a suitable and practical construction for
the study of averages of tensor fields that satisfy differential equations.
Although... | [
{
"created": "Wed, 19 Oct 2016 14:42:27 GMT",
"version": "v1"
}
] | 2016-10-20 | [
[
"Boero",
"Ezequiel F.",
""
],
[
"Moreschi",
"Osvaldo M.",
""
]
] | We present a definition of tensor fields which are average of tensors over a manifold, with a straightforward and natural definition of derivative for the averaged fields; which in turn makes a suitable and practical construction for the study of averages of tensor fields that satisfy differential equations. Although w... |
2301.09204 | Philip Beltracchi | Philip Beltracchi | Anisotropic Segre [(11)(1,1)] dark energy following a particular
equation of state | Replaced with published version | JCAP09(2023)010 | 10.1088/1475-7516/2023/09/010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A generally anisotropic equation of state originally derived in the context
of Newman-Janis rotating systems allows for vacuum energy at a specific
density. In this paper we examine the possibility of using that equation of
state for cosmological dark energy. We treat the case of large scale ordering
of the direction... | [
{
"created": "Sun, 22 Jan 2023 21:14:49 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Sep 2023 22:28:38 GMT",
"version": "v2"
}
] | 2023-09-08 | [
[
"Beltracchi",
"Philip",
""
]
] | A generally anisotropic equation of state originally derived in the context of Newman-Janis rotating systems allows for vacuum energy at a specific density. In this paper we examine the possibility of using that equation of state for cosmological dark energy. We treat the case of large scale ordering of the directions ... |
gr-qc/0001014 | Masafumi Seriu | Masafumi Seriu | Spectral Representation and the Averaging Problem in Cosmology | To appear in General Relativity and Gravitation. The development of a
talk given at South African Relativistic Cosmology Conference, February 1-5
1999, Department of Mathematics and Applied Mathematics, University of Cape
Town, South Africa | Gen.Rel.Grav.32:1473-1485,2000 | 10.1023/A:1001977900785 | null | gr-qc | null | We investigate the averaging problem in cosmology as the problem of
introducing a distance between spaces.
We first introduce the spectral distance, which is a measure of closeness
between spaces defined in terms of the spectra of the Laplacian. Then we define
a space S, the space of all spaces equipped with the sp... | [
{
"created": "Fri, 7 Jan 2000 06:44:00 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Seriu",
"Masafumi",
""
]
] | We investigate the averaging problem in cosmology as the problem of introducing a distance between spaces. We first introduce the spectral distance, which is a measure of closeness between spaces defined in terms of the spectra of the Laplacian. Then we define a space S, the space of all spaces equipped with the spectr... |
2011.07875 | Vasileios Letsios | Vasileios A. Letsios | The eigenmodes for spinor quantum field theory in global de Sitter
space-time | 33 pages | null | 10.1063/5.0038651 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The mode solutions of the Dirac equation on $N$-dimensional de Sitter
space-time ($dS_{N}$) with $(N-1)$-sphere spatial sections are obtained by
analytically continuing the spinor eigenfunctions of the Dirac operator on the
$N$-sphere ($S^{N}$). The analogs of flat space-time positive frequency modes
are identified a... | [
{
"created": "Mon, 16 Nov 2020 11:24:44 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Nov 2020 18:15:08 GMT",
"version": "v2"
}
] | 2022-06-22 | [
[
"Letsios",
"Vasileios A.",
""
]
] | The mode solutions of the Dirac equation on $N$-dimensional de Sitter space-time ($dS_{N}$) with $(N-1)$-sphere spatial sections are obtained by analytically continuing the spinor eigenfunctions of the Dirac operator on the $N$-sphere ($S^{N}$). The analogs of flat space-time positive frequency modes are identified and... |
2206.07794 | Kyriakos Destounis Dr. | Kyriakos Destounis, Giacomo Mascher and Kostas D. Kokkotas | Dynamical behavior of the $C$-metric: charged scalar fields, quasinormal
modes and superradiance | 12 pages, 8 figures, accepted for publication in PRD, updated
references | Phys. Rev. D 105, 124058 (2022) | 10.1103/PhysRevD.105.124058 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | The $C$-metric is a boost-symmetric spacetime solution to the vacuum Einstein
field equations which describes black holes that are uniformly accelerated
under the tension of a cosmic string. Only recently the thermodynamics of
accelerating black holes and their modal stability against neutral scalar
perturbations wer... | [
{
"created": "Wed, 15 Jun 2022 20:15:57 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Jun 2022 13:38:57 GMT",
"version": "v2"
}
] | 2022-06-24 | [
[
"Destounis",
"Kyriakos",
""
],
[
"Mascher",
"Giacomo",
""
],
[
"Kokkotas",
"Kostas D.",
""
]
] | The $C$-metric is a boost-symmetric spacetime solution to the vacuum Einstein field equations which describes black holes that are uniformly accelerated under the tension of a cosmic string. Only recently the thermodynamics of accelerating black holes and their modal stability against neutral scalar perturbations were ... |
2106.05750 | Camilo Posada PhD | Zden\v{e}k Stuchl\'ik, Jan Hlad\'ik, Jaroslav Vrba, Camilo Posada | Neutrino trapping in extremely compact Tolman VII spacetimes | 13 pages, 9 figures. To appear in EPJC | Eur. Phys. J. C 81, 529 (2021) | 10.1140/epjc/s10052-021-09309-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extremely compact objects trap gravitational waves or neutrinos, assumed to
move along null geodesics in the trapping regions. The trapping of neutrinos
was extensively studied for spherically symmetric extremely compact objects
constructed under the simplest approximation of the uniform energy density
distribution, ... | [
{
"created": "Thu, 10 Jun 2021 13:58:25 GMT",
"version": "v1"
}
] | 2021-06-23 | [
[
"Stuchlík",
"Zdeněk",
""
],
[
"Hladík",
"Jan",
""
],
[
"Vrba",
"Jaroslav",
""
],
[
"Posada",
"Camilo",
""
]
] | Extremely compact objects trap gravitational waves or neutrinos, assumed to move along null geodesics in the trapping regions. The trapping of neutrinos was extensively studied for spherically symmetric extremely compact objects constructed under the simplest approximation of the uniform energy density distribution, wi... |
2111.15148 | Michael Good | Michael R.R. Good and Eric V. Linder | Quantum power: a Lorentz invariant approach to Hawking radiation | 4 pages, 3 figures | Eur. Phys. J. C 82, 204 (2022) | 10.1140/epjc/s10052-022-10167-6 | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | Particle radiation from black holes has an observed emission power depending
on the surface gravity $\kappa = c^4/(4GM)$ as \begin{equation}\nonumber
P_{\textrm{black hole}} \sim \frac{\hbar \kappa^2}{6\pi c^2} = \frac{\hbar
c^6}{96\pi G^2 M^2}\,,\end{equation} while both the radiation from accelerating
particles and... | [
{
"created": "Tue, 30 Nov 2021 06:13:34 GMT",
"version": "v1"
}
] | 2022-03-09 | [
[
"Good",
"Michael R. R.",
""
],
[
"Linder",
"Eric V.",
""
]
] | Particle radiation from black holes has an observed emission power depending on the surface gravity $\kappa = c^4/(4GM)$ as \begin{equation}\nonumber P_{\textrm{black hole}} \sim \frac{\hbar \kappa^2}{6\pi c^2} = \frac{\hbar c^6}{96\pi G^2 M^2}\,,\end{equation} while both the radiation from accelerating particles and m... |
1803.06946 | Gauranga Samanta | Koijam Manihar Singh, Gauranga C. Samanta | Dark energy and its manifestations | 13 pages, 6 figures, Accepted in New Astronomy. arXiv admin note:
text overlap with arXiv:1701.00748 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a four dimensional manifold formalism we study the evolutionary behavior
as well as the ultimate fate of the universe, in the course of which the
contribution of dark energy in these phases are investigated. At one stage we
get a situation (a condition) where the dark energy contained dominates other
types of ener... | [
{
"created": "Mon, 19 Mar 2018 14:18:27 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Apr 2018 14:08:10 GMT",
"version": "v2"
},
{
"created": "Sat, 10 Nov 2018 13:50:10 GMT",
"version": "v3"
}
] | 2018-11-13 | [
[
"Singh",
"Koijam Manihar",
""
],
[
"Samanta",
"Gauranga C.",
""
]
] | In a four dimensional manifold formalism we study the evolutionary behavior as well as the ultimate fate of the universe, in the course of which the contribution of dark energy in these phases are investigated. At one stage we get a situation (a condition) where the dark energy contained dominates other types of energi... |
2303.18046 | Antoni Ramos-Buades | Antoni Ramos-Buades, Alessandra Buonanno, H\'ector Estell\'es,
Mohammed Khalil, Deyan P. Mihaylov, Serguei Ossokine, Lorenzo Pompili, Mahlet
Shiferaw | SEOBNRv5PHM: Next generation of accurate and efficient multipolar
precessing-spin effective-one-body waveforms for binary black holes | null | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spin precession is one of the key physical effects that could unveil the
origin of the compact binaries detected by ground- and space-based
gravitational-wave (GW) detectors, and shed light on their possible formation
channels. Efficiently and accurately modeling the GW signals emitted by these
systems is crucial to ... | [
{
"created": "Fri, 31 Mar 2023 13:28:57 GMT",
"version": "v1"
}
] | 2023-04-03 | [
[
"Ramos-Buades",
"Antoni",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Estellés",
"Héctor",
""
],
[
"Khalil",
"Mohammed",
""
],
[
"Mihaylov",
"Deyan P.",
""
],
[
"Ossokine",
"Serguei",
""
],
[
"Pompili",
"Lorenzo... | Spin precession is one of the key physical effects that could unveil the origin of the compact binaries detected by ground- and space-based gravitational-wave (GW) detectors, and shed light on their possible formation channels. Efficiently and accurately modeling the GW signals emitted by these systems is crucial to ex... |
gr-qc/0110111 | Lars Andersson | Lars Andersson (University of Miami), Vincent Moncrief (Yale
University) | Elliptic-hyperbolic systems and the Einstein equations | 29 pages, several minor corrections, submitted to Ann. H. Poincare | Annales Henri Poincare 4 (2003) 1-34 | null | null | gr-qc math.AP | null | The Einstein evolution equations are studied in a gauge given by a
combination of the constant mean curvature and spatial harmonic coordinate
conditions. This leads to a coupled quasilinear elliptic--hyperbolic system of
evolution equations. We prove that the Cauchy problem is locally strongly
well--posed and that a ... | [
{
"created": "Thu, 25 Oct 2001 21:25:28 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Dec 2001 19:25:25 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Feb 2002 22:25:23 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Andersson",
"Lars",
"",
"University of Miami"
],
[
"Moncrief",
"Vincent",
"",
"Yale\n University"
]
] | The Einstein evolution equations are studied in a gauge given by a combination of the constant mean curvature and spatial harmonic coordinate conditions. This leads to a coupled quasilinear elliptic--hyperbolic system of evolution equations. We prove that the Cauchy problem is locally strongly well--posed and that a co... |
gr-qc/0201046 | Piotr Bizon | P. Bizo\'n and A. Wasserman | On the existence of self-similar spherically symmetric wave maps coupled
to gravity | 15 pages, LaTex | Class.Quant.Grav.19:3309-3322,2002 | 10.1088/0264-9381/19/12/313 | null | gr-qc math-ph math.MP | null | We present a detailed analytical study of spherically symmetric self-similar
solutions in the SU(2) sigma model coupled to gravity. Using a shooting
argument we prove that there is a countable family of solutions which are
analytic inside the past self-similarity horizon. In addition, we show that for
sufficiently sm... | [
{
"created": "Mon, 14 Jan 2002 20:05:45 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Bizoń",
"P.",
""
],
[
"Wasserman",
"A.",
""
]
] | We present a detailed analytical study of spherically symmetric self-similar solutions in the SU(2) sigma model coupled to gravity. Using a shooting argument we prove that there is a countable family of solutions which are analytic inside the past self-similarity horizon. In addition, we show that for sufficiently smal... |
1103.0891 | Saibal Ray | R. N. Tiwari and Saibal Ray | A class of solutions for Einstein field equations with spatially varying
cosmological constant in spherically symmetric anisotropic source | 5 Latex pages | Indian J. pure appl. Math., 27, 907 - 911 (1996) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work a class of interior solution for Einstein field equations
corresponding to a spherically symmetric anisotropic fluid sphere has been
obtained under the assumption that the cosmological constant is spatially
variable. The solution obtained has the characteristics that the pressure and
the cosmological par... | [
{
"created": "Fri, 4 Mar 2011 13:19:10 GMT",
"version": "v1"
}
] | 2011-03-07 | [
[
"Tiwari",
"R. N.",
""
],
[
"Ray",
"Saibal",
""
]
] | In this work a class of interior solution for Einstein field equations corresponding to a spherically symmetric anisotropic fluid sphere has been obtained under the assumption that the cosmological constant is spatially variable. The solution obtained has the characteristics that the pressure and the cosmological param... |
1712.00901 | Hwa-Tung Nieh | H.T. Nieh | Torsion in Gauge Theory | null | Phys. Rev. D 97, 044027 (2018) | 10.1103/PhysRevD.97.044027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The potential conflict between torsion and gauge symmetry in the
Riemann-Cartan curved space-time was noted by Kibble in his 1961 pioneering
paper, and has since been discussed by many authors. Kibble suggested that, to
preserve gauge symmetry, one should forgo the covariant derivative in favor of
the ordinary deriva... | [
{
"created": "Mon, 4 Dec 2017 04:44:03 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Jan 2018 16:57:46 GMT",
"version": "v2"
}
] | 2018-02-28 | [
[
"Nieh",
"H. T.",
""
]
] | The potential conflict between torsion and gauge symmetry in the Riemann-Cartan curved space-time was noted by Kibble in his 1961 pioneering paper, and has since been discussed by many authors. Kibble suggested that, to preserve gauge symmetry, one should forgo the covariant derivative in favor of the ordinary derivati... |
gr-qc/9606007 | null | A.Y. Shiekh (ICTP) | Can the Equivalence Principle Survive Quantization? | 10 Pages LaTeX, Plenary lecture at the International Workshop on
AntiMatter Gravity and AntiHydrogen Spectroscopy, Molise, Italy May 96 (to be
published in the proceedings). References updated | HyperfineInteract.109:105,1997 | 10.1023/A:1012693030982 | null | gr-qc hep-ph hep-th | null | It is well known that Einstein gravity is non-renormalizable; however a
generalized approach is proposed that leads to Einstein gravity {\it after}
renormalization. This them implies that at least one candidate for quantum
gravity treats all matter on an equal footing with regard to the gravitational
behaviour.
| [
{
"created": "Wed, 5 Jun 1996 11:16:27 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jun 1996 07:22:49 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Shiekh",
"A. Y.",
"",
"ICTP"
]
] | It is well known that Einstein gravity is non-renormalizable; however a generalized approach is proposed that leads to Einstein gravity {\it after} renormalization. This them implies that at least one candidate for quantum gravity treats all matter on an equal footing with regard to the gravitational behaviour. |
2402.02039 | Alberto Escalante | Alberto Escalante (Puebla U., Inst. Fis.), P. Fernando Oca\~na
Garc\'ia (Puebla U., Inst. Fis.) | Hamiltonian analysis for perturbative $\lambda R$ gravity | null | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hamiltonian analysis for the linearized $\lambda R$ gravity around the
Minkowski background is performed. The first-class and second-class constraints
for arbitrary values of $\lambda$ are presented, and two physical degrees of
freedom are reported. In addition, we remove the second-class constraints, and
the gen... | [
{
"created": "Sat, 3 Feb 2024 05:27:52 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Apr 2024 16:00:22 GMT",
"version": "v2"
}
] | 2024-04-09 | [
[
"Escalante",
"Alberto",
"",
"Puebla U., Inst. Fis."
],
[
"García",
"P. Fernando Ocaña",
"",
"Puebla U., Inst. Fis."
]
] | The Hamiltonian analysis for the linearized $\lambda R$ gravity around the Minkowski background is performed. The first-class and second-class constraints for arbitrary values of $\lambda$ are presented, and two physical degrees of freedom are reported. In addition, we remove the second-class constraints, and the gener... |
gr-qc/0607080 | Atsushi Taruya | Atsushi Taruya | Probing anisotropies of gravitational-wave backgrounds with a
space-based interferometer III: Reconstruction of a high-frequency skymap | 15 pages, 10 figures, A version with high-resolution figures is
available at
http://www-utap.phys.s.u-tokyo.ac.jp/~ataruya/paper/ms_skymap3.pdf | Phys.Rev.D74:104022,2006 | 10.1103/PhysRevD.74.104022 | null | gr-qc astro-ph | null | We develop a numerical scheme to make a high-frequency skymap of
gravitational-wave backgrounds (GWBs) observed via space-based interferometer.
Based on the cross-correlation technique, the intensity distribution of
anisotropic GWB can be directly reconstructed from the time-ordered data of
cross-correlation signals,... | [
{
"created": "Thu, 20 Jul 2006 14:41:26 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Taruya",
"Atsushi",
""
]
] | We develop a numerical scheme to make a high-frequency skymap of gravitational-wave backgrounds (GWBs) observed via space-based interferometer. Based on the cross-correlation technique, the intensity distribution of anisotropic GWB can be directly reconstructed from the time-ordered data of cross-correlation signals, w... |
gr-qc/9808032 | Alberto Saa | Alberto Saa | Comment on ``Theorem for nonrotating singularity-free universes'' | 1 page, to appear in Phys.Rev.Lett | Phys.Rev.Lett. 81 (1998) 5031 | 10.1103/PhysRevLett.81.5031 | null | gr-qc | null | We show that Raychaudhuri's recently proposed theorem on nonrotating
universes cannot be used to rule out realistic singularity-free descriptions of
the universe, as suggested by him in PRL 80, 654 (1998).
| [
{
"created": "Tue, 11 Aug 1998 16:45:21 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Saa",
"Alberto",
""
]
] | We show that Raychaudhuri's recently proposed theorem on nonrotating universes cannot be used to rule out realistic singularity-free descriptions of the universe, as suggested by him in PRL 80, 654 (1998). |
1708.07191 | Carsten Gundlach | Carsten Gundlach | The Einstein-Vlasov system in spherical symmetry II: spherical
perturbations of static solutions | null | Phys. Rev. D 96, 084008 (2017) | 10.1103/PhysRevD.96.084008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reduce the equations governing the spherically symmetric perturbations of
static spherically symmetric solutions of the Einstein-Vlasov system (with
either massive or massless particles) to a single stratified wave equation
$-\psi_{,tt}=H\psi$, with $H$ containing second derivatives in radius, and
integrals over e... | [
{
"created": "Wed, 23 Aug 2017 21:19:36 GMT",
"version": "v1"
}
] | 2017-10-11 | [
[
"Gundlach",
"Carsten",
""
]
] | We reduce the equations governing the spherically symmetric perturbations of static spherically symmetric solutions of the Einstein-Vlasov system (with either massive or massless particles) to a single stratified wave equation $-\psi_{,tt}=H\psi$, with $H$ containing second derivatives in radius, and integrals over ene... |
gr-qc/0210089 | Alfredo Sandoval-Villalbazo | A. Sandoval-Villalbazo and L.S. Garcia-Colin | Cosmological bulk viscosity, the Burnett regime, and the BGK equation | 9 pages, submitted to CQG | null | null | null | gr-qc | null | Einstein's field equations in FRW space-times are coupled to the BGK equation
in order to derive the stress energy tensor including dissipative effects up to
second order in the thermodynamical forces. The space-time is assumed to be
matter-dominated, but in a low density regime for which a second order
(Burnett) coe... | [
{
"created": "Fri, 25 Oct 2002 18:44:10 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sandoval-Villalbazo",
"A.",
""
],
[
"Garcia-Colin",
"L. S.",
""
]
] | Einstein's field equations in FRW space-times are coupled to the BGK equation in order to derive the stress energy tensor including dissipative effects up to second order in the thermodynamical forces. The space-time is assumed to be matter-dominated, but in a low density regime for which a second order (Burnett) coeff... |
2106.00843 | Radouane Gannouji | M. Sami and Radouane Gannouji | Spontaneous symmetry breaking in the late Universe and glimpses of early
Universe phase transitions \`a la baryogenesis | Invited review by IJMPD. Extended version of review with new topics:
dynamics of electroweak phase transition, issues related to baryogenesis with
technical details on sphalerons, bubble nucleation and baryon asymmetry
mechanisms beyond standard model; title is modified accordingly | null | 10.1142/S0218271821300056 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spontaneous symmetry breaking is the foundation of electroweak unification
and serves as an integral part of the model building beyond the standard model
of particle physics and it also finds interesting applications in the late
Universe. We review development related to obtaining the late cosmic
acceleration from sp... | [
{
"created": "Tue, 1 Jun 2021 22:47:29 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jul 2021 16:32:53 GMT",
"version": "v2"
}
] | 2021-11-17 | [
[
"Sami",
"M.",
""
],
[
"Gannouji",
"Radouane",
""
]
] | Spontaneous symmetry breaking is the foundation of electroweak unification and serves as an integral part of the model building beyond the standard model of particle physics and it also finds interesting applications in the late Universe. We review development related to obtaining the late cosmic acceleration from spon... |
1609.01868 | Soumya Chakrabarti | Soumya Chakrabarti and Narayan Banerjee | Scalar field collapse in a conformally flat spacetime | 14 pages, 3 figures | null | 10.1140/epjc/s10052-017-4740-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The collapse scenario of a scalar field along with a perfect fluid
distribution is investigated for a conformally flat spacetime. The theorem for
the integrability of an anharmonic oscillator has been utilized. For a pure
power law potential of the form ${\phi}^{n+1}$, it is found that a central
singularity is formed... | [
{
"created": "Wed, 7 Sep 2016 08:11:51 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Feb 2017 07:46:02 GMT",
"version": "v2"
}
] | 2017-04-05 | [
[
"Chakrabarti",
"Soumya",
""
],
[
"Banerjee",
"Narayan",
""
]
] | The collapse scenario of a scalar field along with a perfect fluid distribution is investigated for a conformally flat spacetime. The theorem for the integrability of an anharmonic oscillator has been utilized. For a pure power law potential of the form ${\phi}^{n+1}$, it is found that a central singularity is formed w... |
1906.03630 | Edward Anderson | Edward Anderson | A Local Resolution of the Problem of Time. V. Combining Temporal and
Configurational Relationalism for Finite Theories | 18 pages including 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As we have known comprehensively since the early 1990's works of Isham and
Kucha\v{r}, The Problem of Time mostly concerns interferences between its many
facets. Having introduced the local facets in Articles I to IV, we now show how
Article I's approach to Temporal Relationalism can be combined with Article
II's to ... | [
{
"created": "Sun, 9 Jun 2019 12:54:38 GMT",
"version": "v1"
}
] | 2019-06-11 | [
[
"Anderson",
"Edward",
""
]
] | As we have known comprehensively since the early 1990's works of Isham and Kucha\v{r}, The Problem of Time mostly concerns interferences between its many facets. Having introduced the local facets in Articles I to IV, we now show how Article I's approach to Temporal Relationalism can be combined with Article II's to Co... |
1006.5747 | Marcelo Salgado | Luisa G. Jaime, Leonardo Patino, and Marcelo Salgado | Robust approach to f(R) gravity | 5 pages; 2 figures (4 panels); minor corrections to match the
published version; panel added | Phys.Rev.D83:024039,2011 | 10.1103/PhysRevD.83.024039 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider metric f(R) theories of gravity without mapping them to their
scalar-tensor counterpart, but using the Ricci scalar itself as an "extra"
degree of freedom. This approach avoids then the introduction of a scalar-field
potential that might be ill defined (not single valued). In order to explicitly
show the ... | [
{
"created": "Wed, 30 Jun 2010 00:14:20 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Oct 2010 00:06:11 GMT",
"version": "v2"
},
{
"created": "Mon, 31 Jan 2011 23:27:02 GMT",
"version": "v3"
}
] | 2011-02-15 | [
[
"Jaime",
"Luisa G.",
""
],
[
"Patino",
"Leonardo",
""
],
[
"Salgado",
"Marcelo",
""
]
] | We consider metric f(R) theories of gravity without mapping them to their scalar-tensor counterpart, but using the Ricci scalar itself as an "extra" degree of freedom. This approach avoids then the introduction of a scalar-field potential that might be ill defined (not single valued). In order to explicitly show the us... |
1807.00724 | Emanuel Gallo | Gabriel Crisnejo, Emanuel Gallo and Adam Rogers | Finite distance corrections to the light deflection in a gravitational
field with a plasma medium | 31 pages. Substantial additions. New section added, new theorem
proved and a broader discussion on the deflection of light in the extended
solar corona plasma model | Phys. Rev. D 99, 124001 (2019) | 10.1103/PhysRevD.99.124001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of the present work is twofold: first, we present general remarks
about the application of recent procedures to compute the deflection angle in
spherically symmetric and asymptotically flat spacetimes, taking into account
finite distance corrections based on the Gauss-Bonnet theorem. Second, and as
the main p... | [
{
"created": "Mon, 2 Jul 2018 15:00:12 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jul 2018 23:20:42 GMT",
"version": "v2"
},
{
"created": "Tue, 21 Aug 2018 20:21:58 GMT",
"version": "v3"
},
{
"created": "Thu, 6 Sep 2018 17:28:01 GMT",
"version": "v4"
},
{
"crea... | 2019-06-12 | [
[
"Crisnejo",
"Gabriel",
""
],
[
"Gallo",
"Emanuel",
""
],
[
"Rogers",
"Adam",
""
]
] | The aim of the present work is twofold: first, we present general remarks about the application of recent procedures to compute the deflection angle in spherically symmetric and asymptotically flat spacetimes, taking into account finite distance corrections based on the Gauss-Bonnet theorem. Second, and as the main par... |
2009.06580 | Abhijit Chakraborty | H. E. Camblong, A. Chakraborty, C. R. Ordonez | Near-horizon aspects of acceleration radiation by free fall of an atom
into a black hole | 23 pages, 2 figures, Accepted to be published in PRD | Phys. Rev. D 102, 085010 (2020) | 10.1103/PhysRevD.102.085010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A two-level atom freely falling towards a Schwarzschild black hole was
recently shown to detect radiation in the Boulware vacuum in an insightful
paper [M. O. Scully et al., Proc. Natl. Acad. Sci. U.S.A. 115, 8131 (2018)].
The two-state atom acts as a dipole detector and its interaction with the field
can be modeled ... | [
{
"created": "Mon, 14 Sep 2020 17:11:14 GMT",
"version": "v1"
}
] | 2020-10-28 | [
[
"Camblong",
"H. E.",
""
],
[
"Chakraborty",
"A.",
""
],
[
"Ordonez",
"C. R.",
""
]
] | A two-level atom freely falling towards a Schwarzschild black hole was recently shown to detect radiation in the Boulware vacuum in an insightful paper [M. O. Scully et al., Proc. Natl. Acad. Sci. U.S.A. 115, 8131 (2018)]. The two-state atom acts as a dipole detector and its interaction with the field can be modeled us... |
1512.03010 | Elizabeth Winstanley | Ben L. Shepherd and Elizabeth Winstanley | Dyons and dyonic black holes in ${\mathfrak {su}}(N)$
Einstein-Yang-Mills theory in anti-de Sitter space-time | 18 pages, 16 figures, minor revisions, references added, accepted for
publication in Physical Review D | Phys. Rev. D 93, 064064 (2016) | 10.1103/PhysRevD.93.064064 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present new spherically symmetric, dyonic soliton and black hole solutions
of the ${\mathfrak {su}}(N)$ Einstein-Yang-Mills equations in four-dimensional
asymptotically anti-de Sitter space-time. The gauge field has nontrivial
electric and magnetic components and is described by $N-1$ magnetic gauge field
function... | [
{
"created": "Wed, 9 Dec 2015 19:39:37 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Mar 2016 03:04:27 GMT",
"version": "v2"
}
] | 2016-03-30 | [
[
"Shepherd",
"Ben L.",
""
],
[
"Winstanley",
"Elizabeth",
""
]
] | We present new spherically symmetric, dyonic soliton and black hole solutions of the ${\mathfrak {su}}(N)$ Einstein-Yang-Mills equations in four-dimensional asymptotically anti-de Sitter space-time. The gauge field has nontrivial electric and magnetic components and is described by $N-1$ magnetic gauge field functions ... |
1811.03369 | Alessio Baldazzi | Alessio Baldazzi, Roberto Percacci and Vedran Skrinjar | Wicked metrics | null | null | 10.1088/1361-6382/ab187d | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are various ways of defining the Wick rotation in a gravitational
context. There are good arguments to view it as an analytic continuation of the
metric, instead of the coordinates. We focus on one very general definition and
argue that it is incompatible with the requirement of preserving the field
equations a... | [
{
"created": "Thu, 8 Nov 2018 11:55:05 GMT",
"version": "v1"
}
] | 2019-05-22 | [
[
"Baldazzi",
"Alessio",
""
],
[
"Percacci",
"Roberto",
""
],
[
"Skrinjar",
"Vedran",
""
]
] | There are various ways of defining the Wick rotation in a gravitational context. There are good arguments to view it as an analytic continuation of the metric, instead of the coordinates. We focus on one very general definition and argue that it is incompatible with the requirement of preserving the field equations and... |
2311.07900 | Dmitry Korotkin | Dmitry Korotkin and Henning Samtleben | Integrability and Einstein's Equations | null | null | null | null | gr-qc hep-th math-ph math.MP nlin.SI | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Integrable structures arise in general relativity when the spacetime
possesses a pair of commuting Killing vectors admitting 2-spaces orthogonal to
the group orbits. The physical interpretation of such spacetimes depends on the
norm of the Killing vectors. They include stationary axisymmetric spacetimes,
Einstein-Ros... | [
{
"created": "Tue, 14 Nov 2023 04:19:33 GMT",
"version": "v1"
}
] | 2023-11-17 | [
[
"Korotkin",
"Dmitry",
""
],
[
"Samtleben",
"Henning",
""
]
] | Integrable structures arise in general relativity when the spacetime possesses a pair of commuting Killing vectors admitting 2-spaces orthogonal to the group orbits. The physical interpretation of such spacetimes depends on the norm of the Killing vectors. They include stationary axisymmetric spacetimes, Einstein-Rosen... |
1911.11495 | Salah Nasri | Hemza Azri and Salah Nasri | Entropy Production in Affine Inflation | To appear in PRD | Phys. Rev. D 101, 064073 (2020) | 10.1103/PhysRevD.101.064073 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Multiple scalar fields nonminimally interacting through pure affine gravity
are considered to generate primordial perturbations during an inflationary
phase. The couplings considered give rise to two distinct sources of entropy
perturbations that may not be suppressed in the long wavelength limit. The
first is merely... | [
{
"created": "Tue, 26 Nov 2019 12:31:56 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Mar 2020 08:14:26 GMT",
"version": "v2"
}
] | 2020-04-02 | [
[
"Azri",
"Hemza",
""
],
[
"Nasri",
"Salah",
""
]
] | Multiple scalar fields nonminimally interacting through pure affine gravity are considered to generate primordial perturbations during an inflationary phase. The couplings considered give rise to two distinct sources of entropy perturbations that may not be suppressed in the long wavelength limit. The first is merely i... |
2109.11476 | David Prinz | David Prinz and Alexander Schmeding | Lie Theory for Asymptotic Symmetries in General Relativity: The NU Group | 37 pages, article; minor revisions; version to appear in Classical
and Quantum Gravity | Class. Quantum Grav. 39 (2022) 155005 | 10.1088/1361-6382/ac776c | null | gr-qc math-ph math.GR math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Newman--Unti (NU) group from the viewpoint of
infinite-dimensional geometry. The NU group is a topological group in a natural
coarse topology, but it does not become a manifold and hence a Lie group in
this topology. To obtain a manifold structure we consider a finer Whitney-type
topology. This turns the... | [
{
"created": "Thu, 23 Sep 2021 16:30:00 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Sep 2021 09:33:22 GMT",
"version": "v2"
},
{
"created": "Wed, 29 Jun 2022 16:30:01 GMT",
"version": "v3"
}
] | 2022-07-11 | [
[
"Prinz",
"David",
""
],
[
"Schmeding",
"Alexander",
""
]
] | We study the Newman--Unti (NU) group from the viewpoint of infinite-dimensional geometry. The NU group is a topological group in a natural coarse topology, but it does not become a manifold and hence a Lie group in this topology. To obtain a manifold structure we consider a finer Whitney-type topology. This turns the u... |
1908.08599 | Kamran Derakhshani | Kamran Derakhshani | Black Body Radiation in Moving Frames | arXiv admin note: The authorship for this submission is currently in
dispute | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of black body radiation, when measured by a moving observer, has
a pivotal role in relativistic thermodynamics. Mutually, it depends on the
thermodynamical definition of the thermal equilibrium and temperature of moving
bodies, i.e. under a Lorentz transformation, and also in a gravitational field.
Surpri... | [
{
"created": "Thu, 22 Aug 2019 21:12:18 GMT",
"version": "v1"
}
] | 2019-09-26 | [
[
"Derakhshani",
"Kamran",
""
]
] | The problem of black body radiation, when measured by a moving observer, has a pivotal role in relativistic thermodynamics. Mutually, it depends on the thermodynamical definition of the thermal equilibrium and temperature of moving bodies, i.e. under a Lorentz transformation, and also in a gravitational field. Surprisi... |
1611.07192 | Martin Zofka | Ji\v{r}\'i Ryzner, Martin \v{Z}ofka | Extremally charged line | 16 pages, 7 figures | Class. Quant. Gravity 33 (2016) 245005 | 10.1088/0264-9381/33/24/245005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the properties of a static, cylindrically symmetric
Majumdar-Papapetrou-type solution of Einstein-Maxwell equations. We locate its
singularities, establish its algebraic type, find its asymptotic properties and
weak-field limit, study the structure of electrogeodesics, and determine the
mass and charge... | [
{
"created": "Tue, 22 Nov 2016 08:26:11 GMT",
"version": "v1"
}
] | 2016-12-07 | [
[
"Ryzner",
"Jiří",
""
],
[
"Žofka",
"Martin",
""
]
] | We investigate the properties of a static, cylindrically symmetric Majumdar-Papapetrou-type solution of Einstein-Maxwell equations. We locate its singularities, establish its algebraic type, find its asymptotic properties and weak-field limit, study the structure of electrogeodesics, and determine the mass and charge o... |
1612.05830 | Dan Vollick | Dan N. Vollick | Null Surfaces in Static Space-times | null | European Physics Journal Plus 130, 157 (2015) | 10.1140/epjp/i2015-15157-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper I consider surfaces in a space-time with a Killing vector
$\xi^{\alpha}$ that is time-like and hypersurface orthogonal on one side of the
surface. The Killing vector may be either time-like or space-like on the other
side of the surface. It has been argued that the surface is null if
$\xi_{\alpha}\xi^{\... | [
{
"created": "Sat, 17 Dec 2016 22:18:14 GMT",
"version": "v1"
}
] | 2016-12-20 | [
[
"Vollick",
"Dan N.",
""
]
] | In this paper I consider surfaces in a space-time with a Killing vector $\xi^{\alpha}$ that is time-like and hypersurface orthogonal on one side of the surface. The Killing vector may be either time-like or space-like on the other side of the surface. It has been argued that the surface is null if $\xi_{\alpha}\xi^{\al... |
2004.06605 | Tiberiu Harko | Bruno J. Barros, Bogdan D\v{a}nil\v{a}, Tiberiu Harko, Francisco S. N.
Lobo | Black hole and naked singularity geometries supported by three-form
fields | 19 pages, 22 figures; minor modifications, accepted for publication
in EPJC | Eur. Phys. J. C 80, 617 (2020) | 10.1140/epjc/s10052-020-8178-1 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate static and spherically symmetric solutions in a gravity theory
that extends the standard Hilbert-Einstein action with a Lagrangian constructed
from a three-form field $A_{\alpha \beta \gamma}$, which is related to the
field strength and a potential term. The field equations are derived from a
variation... | [
{
"created": "Tue, 14 Apr 2020 15:40:04 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jun 2020 09:39:32 GMT",
"version": "v2"
}
] | 2020-07-15 | [
[
"Barros",
"Bruno J.",
""
],
[
"Dǎnilǎ",
"Bogdan",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | We investigate static and spherically symmetric solutions in a gravity theory that extends the standard Hilbert-Einstein action with a Lagrangian constructed from a three-form field $A_{\alpha \beta \gamma}$, which is related to the field strength and a potential term. The field equations are derived from a variational... |
1303.1135 | Adam Chudecki Dr | Adam Chudecki and Maciej Przanowski | Killing Symmetries in $\mathcal{H}$-Spaces with $\Lambda$ | null | Jouournal of Mathematical Physics, 54, 102503, (2013) | 10.1063/1.4826346 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | All Killing symmetries in complex $\mathcal{H}$-spaces with $\Lambda$ in
terms of the Pleba\'nski - Robinson - Finley coordinate system are found. All
$\mathcal{H}$-metrics with $\Lambda$ admitting a null Killing vector are
explicitly given. It is shown that the problem of non-null Killing vector
reduces to looking f... | [
{
"created": "Tue, 5 Mar 2013 18:38:49 GMT",
"version": "v1"
}
] | 2013-10-28 | [
[
"Chudecki",
"Adam",
""
],
[
"Przanowski",
"Maciej",
""
]
] | All Killing symmetries in complex $\mathcal{H}$-spaces with $\Lambda$ in terms of the Pleba\'nski - Robinson - Finley coordinate system are found. All $\mathcal{H}$-metrics with $\Lambda$ admitting a null Killing vector are explicitly given. It is shown that the problem of non-null Killing vector reduces to looking for... |
2107.09578 | Parthapratim Pradhan | Parthapratim Pradhan | Energy Formula for Newman-Unti-Tamburino class of Black Holes | Accepted in General Relativity and Gravitation~(Letter) | Gen. Relativ. Gravit. 53, 69 (2021) | 10.1007/s10714-021-02836-w | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We compute the \emph{surface energy~(${\cal E}_{s}^{\pm}$), the rotational
energy~(${\cal E}_{r}^{\pm}$) and the electromagnetic energy~(${\cal
E}_{em}^{\pm}$)} for Newman-Unti-Tamburino~(NUT) class of black hole having the
event horizon~(${\cal H}^{+}$) and the Cauchy horizon~(${\cal H}^{-}$).
Remarkably, we find th... | [
{
"created": "Tue, 20 Jul 2021 15:47:41 GMT",
"version": "v1"
}
] | 2021-07-21 | [
[
"Pradhan",
"Parthapratim",
""
]
] | We compute the \emph{surface energy~(${\cal E}_{s}^{\pm}$), the rotational energy~(${\cal E}_{r}^{\pm}$) and the electromagnetic energy~(${\cal E}_{em}^{\pm}$)} for Newman-Unti-Tamburino~(NUT) class of black hole having the event horizon~(${\cal H}^{+}$) and the Cauchy horizon~(${\cal H}^{-}$). Remarkably, we find that... |
gr-qc/0702030 | Abhay Ashtekar | Abhay Ashtekar | An Introduction to Loop Quantum Gravity Through Cosmology | 20 pages, 4 figures, Introductory Review. Section IV expanded and
references added | Nuovo Cim.B122:135-155,2007 | 10.1393/ncb/i2007-10351-5 | IGPG-07/01-02, NSF-KITP-07-05 | gr-qc | null | This introductory review is addressed to beginning researchers. Some of the
distinguishing features of loop quantum gravity are illustrated through loop
quantum cosmology of FRW models. In particular, these examples illustrate: i)
how `emergent time' can arise; ii) how the technical issue of solving the
Hamiltonian c... | [
{
"created": "Mon, 5 Feb 2007 22:26:44 GMT",
"version": "v1"
},
{
"created": "Tue, 15 May 2007 19:33:18 GMT",
"version": "v2"
}
] | 2010-11-11 | [
[
"Ashtekar",
"Abhay",
""
]
] | This introductory review is addressed to beginning researchers. Some of the distinguishing features of loop quantum gravity are illustrated through loop quantum cosmology of FRW models. In particular, these examples illustrate: i) how `emergent time' can arise; ii) how the technical issue of solving the Hamiltonian con... |
1104.2910 | Daniele Regoli | Daniele Regoli | The relation between Geometry and Matter in classical and quantum
Gravity and Cosmology | PhD thesis, 179 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present thesis is divided into two main research areas: Classical
Cosmology and (Loop) Quantum Gravity. The first part concerns cosmological
models with one phantom and one scalar field, that provide the
`super-accelerated' scenario not excluded by observations, thus exploring
alternatives to the standard LambdaC... | [
{
"created": "Thu, 14 Apr 2011 20:08:44 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Apr 2011 12:47:27 GMT",
"version": "v2"
}
] | 2015-03-19 | [
[
"Regoli",
"Daniele",
""
]
] | The present thesis is divided into two main research areas: Classical Cosmology and (Loop) Quantum Gravity. The first part concerns cosmological models with one phantom and one scalar field, that provide the `super-accelerated' scenario not excluded by observations, thus exploring alternatives to the standard LambdaCDM... |
0706.0115 | Ouali Taoufik | A. Errahmani, T. Ouali | Late time acceleration in 3-brane Brans-Dicke cosmology | null | Mod.Phys.Lett.A23:3095-3111,2008 | 10.1142/S0217732308026881 | null | gr-qc | null | In order to investigate more features of the Brans-Dicke cosmology in the
five-dimensional space-time, we explore the solutions of its dynamiacal
systems. A behavior of the universe in its early and late time by means of the
scale factor is considered. As a results, we show that it is possible to avoid
the big rip si... | [
{
"created": "Fri, 1 Jun 2007 10:17:48 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Jan 2008 08:30:21 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Mar 2008 21:18:11 GMT",
"version": "v3"
}
] | 2008-12-25 | [
[
"Errahmani",
"A.",
""
],
[
"Ouali",
"T.",
""
]
] | In order to investigate more features of the Brans-Dicke cosmology in the five-dimensional space-time, we explore the solutions of its dynamiacal systems. A behavior of the universe in its early and late time by means of the scale factor is considered. As a results, we show that it is possible to avoid the big rip sing... |
1603.04732 | Simon Garruto | Lorenzo Fatibene, Simon Garruto | Principal Symbol of Euler-Lagrange Operators | Some improvements | null | 10.1088/0264-9381/33/14/145012 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We shall introduce the principal symbol for Euler-Lagrange operators and use
them to charac- terise well-posed initial value problems. We shall clarify how
constraints can arise in Lagrangian covariant theories by extending the
standard treatment in GR. Finally, we sketch a quantization procedure based on
what done i... | [
{
"created": "Tue, 15 Mar 2016 15:59:33 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jun 2016 10:43:40 GMT",
"version": "v2"
}
] | 2016-06-29 | [
[
"Fatibene",
"Lorenzo",
""
],
[
"Garruto",
"Simon",
""
]
] | We shall introduce the principal symbol for Euler-Lagrange operators and use them to charac- terise well-posed initial value problems. We shall clarify how constraints can arise in Lagrangian covariant theories by extending the standard treatment in GR. Finally, we sketch a quantization procedure based on what done in ... |
gr-qc/0605099 | Alexey Boyarsky | V.A. Berezin, A. Boyarsky and A.Yu. Neronov | On the Mechanism of Hawking Radiation | This is arXiv submission of the paper published in the Russian
journal Gravitation and Cosmology in 1999 | Gravitation & Cosmology, Vol. 5 (1999), pp. 16-22 | null | null | gr-qc | null | In this paper we derived Hawking radiation as a tuneling of massless
particles through a non-singular horizon in the s-wave approximation. The back
reaction of emitted modes on the background black hole geometry is
self-consistently taken into account. This is arXive copy of the paper
published in the Russian journal... | [
{
"created": "Wed, 17 May 2006 12:49:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Berezin",
"V. A.",
""
],
[
"Boyarsky",
"A.",
""
],
[
"Neronov",
"A. Yu.",
""
]
] | In this paper we derived Hawking radiation as a tuneling of massless particles through a non-singular horizon in the s-wave approximation. The back reaction of emitted modes on the background black hole geometry is self-consistently taken into account. This is arXive copy of the paper published in the Russian journal "... |
2401.10975 | Samarjit Chakraborty | Samarjit Chakraborty | On the thermodynamic aspects of gravity | 190 pages, This Ph.D. thesis has been accepted | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here the Weyl curvature hypothesis is examined using the gravitational
entropy (GE). We have considered the family of C-metric accelerating black
holes and evaluated their corresponding gravitational entropy. Then we studied
the GE in some isotropic and anisotropic cosmologies utilizing the definition
proposed by Cli... | [
{
"created": "Fri, 19 Jan 2024 18:50:07 GMT",
"version": "v1"
}
] | 2024-01-23 | [
[
"Chakraborty",
"Samarjit",
""
]
] | Here the Weyl curvature hypothesis is examined using the gravitational entropy (GE). We have considered the family of C-metric accelerating black holes and evaluated their corresponding gravitational entropy. Then we studied the GE in some isotropic and anisotropic cosmologies utilizing the definition proposed by Clift... |
gr-qc/9704039 | Toshifumi Sakaguchi | Toshifumi Sakaguchi | Against ``Against Many-Worlds Interpretations'' | 6 pages, REVTeX, no figures | null | null | null | gr-qc quant-ph | null | The paper entitled ``Against Many-Worlds Interpretations'' by A. Kent, which
has recently been submitted to the e-Print archive (gr-qc/9703089) contained
some misconceptions. The claims on Everett's many-worlds interpretation are
quoted and answered.
| [
{
"created": "Tue, 15 Apr 1997 14:02:42 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sakaguchi",
"Toshifumi",
""
]
] | The paper entitled ``Against Many-Worlds Interpretations'' by A. Kent, which has recently been submitted to the e-Print archive (gr-qc/9703089) contained some misconceptions. The claims on Everett's many-worlds interpretation are quoted and answered. |
2005.09458 | Rikpratik Sengupta | Prasenjit Paul, Rikpratik Sengupta, Saibal Ray | Modified Power law Inflation: solution to the graceful exit problem and
improvement of dark energy models | 14 pages; Replacement restores version 1 of arXiv:2005.09458 which
was incorrectly replaced | Chinese Physics C 2022 | 10.1088/1674-1137/acaec0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study power law inflation (PLI) with a monomial potential and find a novel
exact solution. It is well known that conventional PLI with exponential
potential is inconsistent with the Planck data. Unlike the standard PLI,
present model does not suffer from graceful exit problem and it agrees fairly
well with recent ... | [
{
"created": "Sun, 17 May 2020 19:26:28 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Feb 2022 16:10:47 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Aug 2022 07:48:22 GMT",
"version": "v3"
},
{
"created": "Tue, 6 Sep 2022 13:22:36 GMT",
"version": "v4"
}
] | 2023-01-02 | [
[
"Paul",
"Prasenjit",
""
],
[
"Sengupta",
"Rikpratik",
""
],
[
"Ray",
"Saibal",
""
]
] | We study power law inflation (PLI) with a monomial potential and find a novel exact solution. It is well known that conventional PLI with exponential potential is inconsistent with the Planck data. Unlike the standard PLI, present model does not suffer from graceful exit problem and it agrees fairly well with recent ob... |
1509.03720 | Sergio Zerbini | Yevgeniya Rabochaya and Sergio Zerbini | A note on a mimetic scalar-tensor cosmological model | 9 pages | null | 10.1140/epjc/s10052-016-3926-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A specific Horndeski scalar-gravity mimetic model is investigated within a
FLWR space-time. The mimetic scalar field is implemented via a Lagrangian
multiplier, and it is shown that the model has equations of motion formally
similar to the original simpler mimetic matter model of
Chamseddine-Mukhanov-Vikman. Several ... | [
{
"created": "Sat, 12 Sep 2015 08:01:29 GMT",
"version": "v1"
}
] | 2016-03-23 | [
[
"Rabochaya",
"Yevgeniya",
""
],
[
"Zerbini",
"Sergio",
""
]
] | A specific Horndeski scalar-gravity mimetic model is investigated within a FLWR space-time. The mimetic scalar field is implemented via a Lagrangian multiplier, and it is shown that the model has equations of motion formally similar to the original simpler mimetic matter model of Chamseddine-Mukhanov-Vikman. Several ex... |
1605.01979 | Joao Paulo Manoel Pitelli | J.P.M. Pitelli | Quantum Cosmology in $(1+1)$-dimensional Ho\v{r}ava-Lifshitz theory of
gravity | 8 pages. To appear in Phys. Rev. D | null | 10.1103/PhysRevD.93.104024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent paper [Phys. Rev. D 92:084012, 2015], the author studied the
classical $(1+1)$-dimensional Friedmann-Robertson-Walker (FRW) universe filled
with a perfect fluid in Ho\v{r}ava-Lifshitz (HL) theory of gravity. This theory
is dynamical due to the anisotropic scaling of space and time. It also
resembles the J... | [
{
"created": "Fri, 6 May 2016 15:51:43 GMT",
"version": "v1"
}
] | 2016-05-25 | [
[
"Pitelli",
"J. P. M.",
""
]
] | In a recent paper [Phys. Rev. D 92:084012, 2015], the author studied the classical $(1+1)$-dimensional Friedmann-Robertson-Walker (FRW) universe filled with a perfect fluid in Ho\v{r}ava-Lifshitz (HL) theory of gravity. This theory is dynamical due to the anisotropic scaling of space and time. It also resembles the Jac... |
2403.10278 | Dongze Sun | Dongze Sun, Michael Boyle, Keefe Mitman, Mark A. Scheel, Leo C. Stein,
Saul A. Teukolsky, Vijay Varma | Optimizing post-Newtonian parameters and fixing the BMS frame for
numerical-relativity waveform hybridizations | 21 pages, 22 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Numerical relativity (NR) simulations of binary black holes provide precise
waveforms, but are typically too computationally expensive to produce waveforms
with enough orbits to cover the whole frequency band of gravitational-wave
observatories. Accordingly, it is important to be able to hybridize NR
waveforms with a... | [
{
"created": "Fri, 15 Mar 2024 13:19:57 GMT",
"version": "v1"
}
] | 2024-03-18 | [
[
"Sun",
"Dongze",
""
],
[
"Boyle",
"Michael",
""
],
[
"Mitman",
"Keefe",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Stein",
"Leo C.",
""
],
[
"Teukolsky",
"Saul A.",
""
],
[
"Varma",
"Vijay",
""
]
] | Numerical relativity (NR) simulations of binary black holes provide precise waveforms, but are typically too computationally expensive to produce waveforms with enough orbits to cover the whole frequency band of gravitational-wave observatories. Accordingly, it is important to be able to hybridize NR waveforms with ana... |
2207.01979 | Mihai Marciu C | Mihai Marciu | A two-field dark energy model with cubic contractions of the Riemann
tensor | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The paper proposes a novel cosmological model based on a two-field scenario,
where the two fields are independently coupled with a specific invariant, based
on cubic contractions of the Riemann tensor. After obtaining the modified
Friedmann equations and the specific Klein-Gordon relations, the investigation
studies ... | [
{
"created": "Tue, 5 Jul 2022 11:46:53 GMT",
"version": "v1"
}
] | 2022-07-06 | [
[
"Marciu",
"Mihai",
""
]
] | The paper proposes a novel cosmological model based on a two-field scenario, where the two fields are independently coupled with a specific invariant, based on cubic contractions of the Riemann tensor. After obtaining the modified Friedmann equations and the specific Klein-Gordon relations, the investigation studies th... |
1703.03696 | Paolo Pani | Elisa Maggio, Paolo Pani, Valeria Ferrari | Exotic Compact Objects and How to Quench their Ergoregion Instability | v3: 14 pages, 9 figures; further clarifications added, new appendix
on the superspinar case, results unchanged. Accepted in Phys. Rev. D | Phys. Rev. D 96, 104047 (2017) | 10.1103/PhysRevD.96.104047 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave astronomy can give us access to the structure of black
holes, potentially probing microscopic or even Planckian corrections at the
horizon scale, as those predicted by some quantum-gravity models of exotic
compact objects. A generic feature of these models is the replacement of the
horizon by a ref... | [
{
"created": "Fri, 10 Mar 2017 14:29:47 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jul 2017 15:28:03 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Nov 2017 01:20:39 GMT",
"version": "v3"
}
] | 2017-12-07 | [
[
"Maggio",
"Elisa",
""
],
[
"Pani",
"Paolo",
""
],
[
"Ferrari",
"Valeria",
""
]
] | Gravitational-wave astronomy can give us access to the structure of black holes, potentially probing microscopic or even Planckian corrections at the horizon scale, as those predicted by some quantum-gravity models of exotic compact objects. A generic feature of these models is the replacement of the horizon by a refle... |
2406.07613 | Jorge Castelo Mourelle | Christoph Adam, Jorge Castelo Mourelle, Etevaldo dos Santos Costa
Filho, Carlos A. R. Herdeiro and Andrzej Wereszczynski | Universal Relations for Rotating Scalar and Vector Boson Stars | 23 pages, 22 figures. We made some corrections | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Bosonic stars represent a hypothetical exotic type of compact stellar objects
that could be observed from the gravitational signal of coalescing binaries in
current and future gravitational wave detectors. There are two main families of
bosonic stars, which depend on the nature that governs the particles that build
t... | [
{
"created": "Tue, 11 Jun 2024 18:00:02 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Aug 2024 14:05:59 GMT",
"version": "v2"
}
] | 2024-08-05 | [
[
"Adam",
"Christoph",
""
],
[
"Mourelle",
"Jorge Castelo",
""
],
[
"Filho",
"Etevaldo dos Santos Costa",
""
],
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Wereszczynski",
"Andrzej",
""
]
] | Bosonic stars represent a hypothetical exotic type of compact stellar objects that could be observed from the gravitational signal of coalescing binaries in current and future gravitational wave detectors. There are two main families of bosonic stars, which depend on the nature that governs the particles that build the... |
0712.3982 | David Wiltshire | David L. Wiltshire | Gravitational energy and cosmic acceleration | 9 pages, 2 figures. An essay which received Honorable Mention in the
2007 GRF Essay Competition. To appear in a special issue of Int. J. Mod.
Phys. D | Int.J.Mod.Phys.D17:641-649,2008 | 10.1142/S0218271808012383 | null | gr-qc astro-ph | null | Cosmic acceleration is explained quantitatively, as an apparent effect due to
gravitational energy differences that arise in the decoupling of bound systems
from the global expansion of the universe. "Dark energy" is a misidentification
of those aspects of gravitational energy which by virtue of the equivalence
princ... | [
{
"created": "Mon, 24 Dec 2007 10:04:12 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Wiltshire",
"David L.",
""
]
] | Cosmic acceleration is explained quantitatively, as an apparent effect due to gravitational energy differences that arise in the decoupling of bound systems from the global expansion of the universe. "Dark energy" is a misidentification of those aspects of gravitational energy which by virtue of the equivalence princip... |
0705.2047 | Yuri Shtanov | Kirill Krasnov, Yuri Shtanov | Non-Metric Gravity II: Spherically Symmetric Solution, Missing Mass and
Redshifts of Quasars | 39 pages, 2 figures, text slightly extended, references added | Class.Quant.Grav.25:025002,2008 | 10.1088/0264-9381/25/2/025002 | null | gr-qc astro-ph hep-th | null | We continue the study of the non-metric theory of gravity introduced in
hep-th/0611182 and gr-qc/0703002 and obtain its general spherically symmetric
vacuum solution. It respects the analog of the Birkhoff theorem, i.e., the
vacuum spherically symmetric solution is necessarily static. As in general
relativity, the sp... | [
{
"created": "Mon, 14 May 2007 22:55:46 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Oct 2007 21:02:03 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Krasnov",
"Kirill",
""
],
[
"Shtanov",
"Yuri",
""
]
] | We continue the study of the non-metric theory of gravity introduced in hep-th/0611182 and gr-qc/0703002 and obtain its general spherically symmetric vacuum solution. It respects the analog of the Birkhoff theorem, i.e., the vacuum spherically symmetric solution is necessarily static. As in general relativity, the sphe... |
gr-qc/9711046 | Ubi Wichoski | R. Opher and U. F. Wichoski | On a Theory for Nonminimal Gravitational-Electromagnetic Coupling
Consistent with Observational Data | 4 pages, no figures, LaTeX (uses mprocl.sty). To appear in the
Proceedings of the Eighth Marcel Grossmann Meeting (Jerusalem, Israel, June
1997) | null | null | BROWN-HET-2001 | gr-qc | null | The idea that the seed primordial magnetic fields can be explained by the
nonminimal coupling between gravitational and electromagnetic fields is
discussed. The predicted values of the magnetic field of the spiral galaxies
are in agreement with the observations.
| [
{
"created": "Fri, 14 Nov 1997 21:09:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Opher",
"R.",
""
],
[
"Wichoski",
"U. F.",
""
]
] | The idea that the seed primordial magnetic fields can be explained by the nonminimal coupling between gravitational and electromagnetic fields is discussed. The predicted values of the magnetic field of the spiral galaxies are in agreement with the observations. |
2012.03431 | Mustapha Azreg-A\"inou | Mustapha Azreg-A\"inou | Rotating cosmological cylindrical wormholes in GR and TEGR sourced by
anisotropic fluids | 8 twocolumn pages, 2 figures, references added. Extended version | Physics of the Dark Universe 32 (2021) 100802 | 10.1016/j.dark.2021.100802 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Given an anisotropic fluid source, we determine in closed forms, upon solving
the field equations of general relativity (GR) and teleparallel gravity (TEGR)
coupled to a cosmological constant, cylindrically symmetric four-dimensional
cosmological rotating wormholes, satisfying all local energy conditions, and
cosmolo... | [
{
"created": "Mon, 7 Dec 2020 03:03:44 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Mar 2021 02:02:13 GMT",
"version": "v2"
}
] | 2021-03-17 | [
[
"Azreg-Aïnou",
"Mustapha",
""
]
] | Given an anisotropic fluid source, we determine in closed forms, upon solving the field equations of general relativity (GR) and teleparallel gravity (TEGR) coupled to a cosmological constant, cylindrically symmetric four-dimensional cosmological rotating wormholes, satisfying all local energy conditions, and cosmologi... |
1402.4557 | Eric Greenwood | Eric Greenwood | Time dependent particle production and particle number in cosmological
de Sitter space | 19 pages | null | 10.1142/S0218271815500315 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider the occupation number of induced quasi-particles
produced during a time-dependent process using three-different methods:
Instantaneous diagonalization, Bogolyubov transformation between two different
vacua, and the Unruh-de Witt detector. Here we consider the Hamiltonian for a
time-dependent... | [
{
"created": "Wed, 19 Feb 2014 04:20:31 GMT",
"version": "v1"
}
] | 2015-06-18 | [
[
"Greenwood",
"Eric",
""
]
] | In this paper we consider the occupation number of induced quasi-particles produced during a time-dependent process using three-different methods: Instantaneous diagonalization, Bogolyubov transformation between two different vacua, and the Unruh-de Witt detector. Here we consider the Hamiltonian for a time-dependent H... |
0805.2665 | Marek Szydlowski | Marek Szydlowski, Pawel Tambor | Dynamical Emergence of FRW Cosmological Models | 8ssmmp.cls, 14 pages, 3 figures; rev. 2: added section on emergence
from bifurcation; rev. 3: reorganized and shortened text; transition from the
LCDM to CDM model was explicitly shown, for this aim it was used the theorem
on smooth dependence of solution on initial conditions and change of
parameters. In: B. D... | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent astronomical observations strongly indicate that the current Universe
is undergoing an accelerated phase of expansion. The discovery of this fact was
unexpected and resulted in the comeback of cosmological constant. The
conception of standard cosmological model has its roots in this context. The
paper relates ... | [
{
"created": "Sat, 17 May 2008 11:49:05 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Jan 2009 11:17:09 GMT",
"version": "v2"
},
{
"created": "Thu, 29 Oct 2015 12:46:54 GMT",
"version": "v3"
}
] | 2015-10-30 | [
[
"Szydlowski",
"Marek",
""
],
[
"Tambor",
"Pawel",
""
]
] | Recent astronomical observations strongly indicate that the current Universe is undergoing an accelerated phase of expansion. The discovery of this fact was unexpected and resulted in the comeback of cosmological constant. The conception of standard cosmological model has its roots in this context. The paper relates to... |
0709.2051 | Eugenio Bianchi | Eugenio Bianchi, Leonardo Modesto | The perturbative Regge-calculus regime of Loop Quantum Gravity | 43 pages, typos corrected, version accepted by Nucl.Phys.B | Nucl.Phys.B796:581-621,2008 | 10.1016/j.nuclphysb.2007.12.011 | null | gr-qc hep-th | null | The relation between Loop Quantum Gravity and Regge calculus has been pointed
out many times in the literature. In particular the large spin asymptotics of
the Barrett-Crane vertex amplitude is known to be related to the Regge action.
In this paper we study a semiclassical regime of Loop Quantum Gravity and show
that... | [
{
"created": "Thu, 13 Sep 2007 12:02:14 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Dec 2007 09:41:32 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bianchi",
"Eugenio",
""
],
[
"Modesto",
"Leonardo",
""
]
] | The relation between Loop Quantum Gravity and Regge calculus has been pointed out many times in the literature. In particular the large spin asymptotics of the Barrett-Crane vertex amplitude is known to be related to the Regge action. In this paper we study a semiclassical regime of Loop Quantum Gravity and show that i... |
2107.03406 | Kinjalk Lochan | Kinjalk Lochan and T. Padmanabhan | A nested sequence of comoving Rindler frames, the corresponding vacuum
states, and the local nature of acceleration temperature | 9 pages of main discussion + 6 pages of Appendix, 2 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Bogoliubov transformation connecting the standard inertial frame mode
functions to the standard mode functions defined in the Rindler frame $R_0$,
leads to the result that the inertial vacuum appears as a thermal state with
temperature $T_0=a_0/2\pi$ where $a_0$ is the acceleration parameter of $R_0$.
We construc... | [
{
"created": "Wed, 7 Jul 2021 18:00:04 GMT",
"version": "v1"
}
] | 2021-07-09 | [
[
"Lochan",
"Kinjalk",
""
],
[
"Padmanabhan",
"T.",
""
]
] | The Bogoliubov transformation connecting the standard inertial frame mode functions to the standard mode functions defined in the Rindler frame $R_0$, leads to the result that the inertial vacuum appears as a thermal state with temperature $T_0=a_0/2\pi$ where $a_0$ is the acceleration parameter of $R_0$. We construct ... |
1503.04186 | Carlos Augusto Romero Filho | J. E. Madriz Aguilar, C. Romero, J. B. Fonseca-Neto, T. S. Almeida, J.
B. Formiga | (2+1)-Dimensional Gravity in Weyl Integrable Spacetime | 9 pages. arXiv admin note: text overlap with arXiv:1201.1469,
arXiv:1101.5333 | null | 10.1088/0264-9381/32/21/215003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate (2+1)-dimensional gravity in a Weyl integrable spacetime
(WIST). We show that, unlike general relativity, this scalar-tensor theory has
a Newtonian limit for any dimension and that in three dimensions the congruence
of world lines of particles of a pressureless fluid has a non-vanishing
geodesic deviat... | [
{
"created": "Fri, 13 Mar 2015 18:51:38 GMT",
"version": "v1"
}
] | 2015-10-21 | [
[
"Aguilar",
"J. E. Madriz",
""
],
[
"Romero",
"C.",
""
],
[
"Fonseca-Neto",
"J. B.",
""
],
[
"Almeida",
"T. S.",
""
],
[
"Formiga",
"J. B.",
""
]
] | We investigate (2+1)-dimensional gravity in a Weyl integrable spacetime (WIST). We show that, unlike general relativity, this scalar-tensor theory has a Newtonian limit for any dimension and that in three dimensions the congruence of world lines of particles of a pressureless fluid has a non-vanishing geodesic deviatio... |
gr-qc/0207111 | Hanno Sahlmann | Hanno Sahlmann | Some results concerning the representation theory of the algebra
underlying loop quantum gravity | LaTeX, 14 pages, no figures. v2: corrected a minor issue with the
mathematical reasoning, updated references; article is now identical to
published version | J. Math. Phys. 52:012502,2011 | 10.1063/1.3525705 | AEI-2002-056 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Important characteristics of the loop approach to quantum gravity are a
specific choice of the algebra A of observables and of a representation of A on
a measure space over the space of generalized connections. This representation
is singled out by its elegance and diffeomorphism covariance.
Recently, in the contex... | [
{
"created": "Mon, 29 Jul 2002 15:32:20 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jan 2011 02:44:20 GMT",
"version": "v2"
}
] | 2011-01-27 | [
[
"Sahlmann",
"Hanno",
""
]
] | Important characteristics of the loop approach to quantum gravity are a specific choice of the algebra A of observables and of a representation of A on a measure space over the space of generalized connections. This representation is singled out by its elegance and diffeomorphism covariance. Recently, in the context of... |
1610.09283 | Saugata Mitra | Saugata Mitra, Subhajit Saha and Subenoy Chakraborty | Universal thermodynamics in different gravity theories: Conditions for
generalized second law of thermodynamics and thermodynamical equilibrium on
the horizons | null | Annals of Physics 355, 1 (2015) | 10.1016/j.aop.2015.01.025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present work deals with a detailed study of universal thermodynamics in
different modified gravity theories. The validity of the generalized second law
of thermodynamics (GSLT) and thermodynamical equilibrium (TE) of the Universe
bounded by a horizon (apparent/event) in f(R)-gravity, Einstein-Gauss-Bonnet
gravity... | [
{
"created": "Thu, 27 Oct 2016 08:12:30 GMT",
"version": "v1"
}
] | 2016-11-02 | [
[
"Mitra",
"Saugata",
""
],
[
"Saha",
"Subhajit",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | The present work deals with a detailed study of universal thermodynamics in different modified gravity theories. The validity of the generalized second law of thermodynamics (GSLT) and thermodynamical equilibrium (TE) of the Universe bounded by a horizon (apparent/event) in f(R)-gravity, Einstein-Gauss-Bonnet gravity, ... |
gr-qc/0310094 | Dumitru Baleanu | D. Baleanu | Hamilton-Jacobi formalism of the massive Yang-Mills theory revisited | LATEX, 8 pages | Nuovo Cim.B118:197-203,2003 | null | null | gr-qc hep-th | null | Using Hamilton-Jacobi formalism we investigated the massive Yang-Mills theory
on both extended and reduced phase-space. The integrability conditions were
discussed and the actions were calculated.
| [
{
"created": "Sun, 19 Oct 2003 10:55:46 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Baleanu",
"D.",
""
]
] | Using Hamilton-Jacobi formalism we investigated the massive Yang-Mills theory on both extended and reduced phase-space. The integrability conditions were discussed and the actions were calculated. |
2402.09435 | Hamed Hadi | H. Hadi, R. Naderi | Gravitational memory effects of black bounces and a traversable wormhole | null | Eur. Phys. J. C (2024) 84:343 | 10.1140/epjc/s10052-024-12718-5 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Black bounces are spacetimes that can be interpreted as either black holes or
wormholes depending on specific parameters. In this study, we examine the
Simpson-Visser and Bardeen-type solutions as black bounces and investigate the
gravitational wave in the background of these solutions. We then explore the
displaceme... | [
{
"created": "Fri, 26 Jan 2024 17:44:11 GMT",
"version": "v1"
},
{
"created": "Tue, 21 May 2024 07:27:04 GMT",
"version": "v2"
}
] | 2024-05-22 | [
[
"Hadi",
"H.",
""
],
[
"Naderi",
"R.",
""
]
] | Black bounces are spacetimes that can be interpreted as either black holes or wormholes depending on specific parameters. In this study, we examine the Simpson-Visser and Bardeen-type solutions as black bounces and investigate the gravitational wave in the background of these solutions. We then explore the displacement... |
gr-qc/0411026 | M. Meyer | S. Deser | How Special Relativity Determines the Signs of the Nonrelativistic,
Coulomb and Newtonian, Forces | 8 pages. Amplified version, to appear in Am. J. Phys | Am J Phys 73 6 (2005) | 10.1119/1.1898503 | BRX TH-549 | gr-qc physics.class-ph | null | We show that the empirical signs of the fundamental {\it static}
Coulomb/Newton forces are dictated by the seemingly unrelated requirement that
the photons/gravitons in the respective underlying Maxwell/Einstein physics be
stable. This linkage, which is imposed by special relativity, is manifested
upon decomposing th... | [
{
"created": "Thu, 4 Nov 2004 16:54:52 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Feb 2005 15:46:50 GMT",
"version": "v2"
}
] | 2009-11-19 | [
[
"Deser",
"S.",
""
]
] | We show that the empirical signs of the fundamental {\it static} Coulomb/Newton forces are dictated by the seemingly unrelated requirement that the photons/gravitons in the respective underlying Maxwell/Einstein physics be stable. This linkage, which is imposed by special relativity, is manifested upon decomposing the ... |
1606.06331 | Alexander B. Balakin | Alexander B. Balakin | Electrodynamics of a Cosmic Dark Fluid | 39 pages, 0 figures, replaced by the version published in MDPI
Journal "Symmetry" (Special Issue: Symmetry: Feature Papers 2016); typos
corrected | Symmetry (2016) 8(7), 56 | 10.3390/sym8070056 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmic Dark Fluid is considered as a non-stationary medium, in which
electromagnetic waves propagate, and magneto-electric field structures emerge
and evolve. A medium - type representation of the Dark Fluid allows us to
involve into analysis the concepts and mathematical formalism elaborated in the
framework of clas... | [
{
"created": "Mon, 20 Jun 2016 21:01:10 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Jun 2016 21:17:27 GMT",
"version": "v2"
}
] | 2016-07-01 | [
[
"Balakin",
"Alexander B.",
""
]
] | Cosmic Dark Fluid is considered as a non-stationary medium, in which electromagnetic waves propagate, and magneto-electric field structures emerge and evolve. A medium - type representation of the Dark Fluid allows us to involve into analysis the concepts and mathematical formalism elaborated in the framework of classi... |
1109.4315 | Edmund Schluessel | Edmund R. Schluessel | Long-wavelength gravitational waves and cosmic acceleration | 80 pages, 2 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Strong long-scale gravitational waves can explain cosmic acceleration within
the context of general relativity without resorting to the assumption of exotic
forms of matter such as quintessence. The existence of these gravitational
waves in sufficient strength to cause observed acceleration can be compatible
with the... | [
{
"created": "Tue, 20 Sep 2011 15:08:09 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Sep 2011 22:24:29 GMT",
"version": "v2"
}
] | 2011-09-23 | [
[
"Schluessel",
"Edmund R.",
""
]
] | Strong long-scale gravitational waves can explain cosmic acceleration within the context of general relativity without resorting to the assumption of exotic forms of matter such as quintessence. The existence of these gravitational waves in sufficient strength to cause observed acceleration can be compatible with the c... |
1911.03695 | Sergey Rubin | J\'ulio C. Fabris, Arkady A. Popov, Sergey G. Rubin | Multidimensional gravity with higher derivatives and inflation | 12 pages | Phys.Lett.B, 806, 135458, 2020 | 10.1016/j.physletb.2020.135458 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We elaborate on the inflationary model starting from multidimensional
Lagrangian and gravity with second-order curvature terms. The effective scalar
field is related to the Ricci scalar of extra dimensions. It is shown that the
Kretschmann and the Ricci tensor square terms dominate during inflation. The
observable va... | [
{
"created": "Sat, 9 Nov 2019 14:15:36 GMT",
"version": "v1"
}
] | 2020-06-05 | [
[
"Fabris",
"Júlio C.",
""
],
[
"Popov",
"Arkady A.",
""
],
[
"Rubin",
"Sergey G.",
""
]
] | We elaborate on the inflationary model starting from multidimensional Lagrangian and gravity with second-order curvature terms. The effective scalar field is related to the Ricci scalar of extra dimensions. It is shown that the Kretschmann and the Ricci tensor square terms dominate during inflation. The observable valu... |
1706.05584 | N\'estor Ortiz | N\'estor Ortiz and Olivier Sarbach | Cauchy horizon stability in a collapsing spherical dust cloud. II:
Energy bounds for test fields and odd-parity gravitational perturbations | 27 pages, 3 figures. Conclusion improved. References added. Matches
published version | Class.Quant.Grav. 35 (2018) no.2, 025010 | 10.1088/1361-6382/aa8e70 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the stability of the Cauchy horizon associated with a globally
naked, shell-focussing singularity arising from the complete gravitational
collapse of a spherical dust cloud. In previous work, we have studied the
dynamics of spherical test scalar fields on such a background. In particular,
we proved that su... | [
{
"created": "Sat, 17 Jun 2017 22:20:15 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Jan 2018 22:00:46 GMT",
"version": "v2"
}
] | 2018-01-09 | [
[
"Ortiz",
"Néstor",
""
],
[
"Sarbach",
"Olivier",
""
]
] | We analyze the stability of the Cauchy horizon associated with a globally naked, shell-focussing singularity arising from the complete gravitational collapse of a spherical dust cloud. In previous work, we have studied the dynamics of spherical test scalar fields on such a background. In particular, we proved that such... |
gr-qc/0412005 | J. Ponce de Leon | J. Ponce de Leon | Transition from decelerated to accelerated cosmic expansion in
braneworld universes | In V2 typos are corrected and one reference is added for section 1.
To appear in General Relativity and Gravitation | Gen.Rel.Grav.38:61-81,2006 | 10.1007/s10714-005-0209-6 | null | gr-qc | null | Braneworld theory provides a natural setting to treat, at a classical level,
the cosmological effects of vacuum energy. Non-static extra dimensions can
generally lead to a variable vacuum energy, which in turn may explain the
present accelerated cosmic expansion. We concentrate our attention in models
where the vacuu... | [
{
"created": "Thu, 2 Dec 2004 04:00:13 GMT",
"version": "v1"
},
{
"created": "Sun, 2 Oct 2005 02:21:32 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"de Leon",
"J. Ponce",
""
]
] | Braneworld theory provides a natural setting to treat, at a classical level, the cosmological effects of vacuum energy. Non-static extra dimensions can generally lead to a variable vacuum energy, which in turn may explain the present accelerated cosmic expansion. We concentrate our attention in models where the vacuum ... |
gr-qc/0410086 | Allan Joseph Michael Medved | A.J.M. Medved | A brief commentary on black hole entropy | 4 pages, Revtex; (v2) some mistaken terminology is corrected | null | null | null | gr-qc | null | It is commonplace, in the literature, to find that the Bekenstein-Hawking
entropy has been endowed with having an explicit statistical interpretation. In
the following essay, we discuss why such a viewpoint warrants a certain degree
of caution.
| [
{
"created": "Mon, 18 Oct 2004 19:53:41 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Oct 2004 00:40:54 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Medved",
"A. J. M.",
""
]
] | It is commonplace, in the literature, to find that the Bekenstein-Hawking entropy has been endowed with having an explicit statistical interpretation. In the following essay, we discuss why such a viewpoint warrants a certain degree of caution. |
2206.14733 | Cosimo Bambi | Jiale Gu, Shafqat Riaz, Askar B. Abdikamalov, Dimitry Ayzenberg,
Cosimo Bambi | Probing bumblebee gravity with black hole X-ray data | 9 pages, 5 figures. v2: refereed version | Eur. Phys. J. C (2022) 82:708 | 10.1140/epjc/s10052-022-10686-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bumblebee gravity is one of the simplest gravity theories with spontaneous
Lorentz symmetry breaking. Since we know a rotating black hole solution in
bumblebee gravity, we can potentially test this model with the available
astrophysical observations of black holes. In this work, we construct a
reflection model in bum... | [
{
"created": "Wed, 29 Jun 2022 15:56:21 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Aug 2022 07:29:42 GMT",
"version": "v2"
}
] | 2022-08-16 | [
[
"Gu",
"Jiale",
""
],
[
"Riaz",
"Shafqat",
""
],
[
"Abdikamalov",
"Askar B.",
""
],
[
"Ayzenberg",
"Dimitry",
""
],
[
"Bambi",
"Cosimo",
""
]
] | Bumblebee gravity is one of the simplest gravity theories with spontaneous Lorentz symmetry breaking. Since we know a rotating black hole solution in bumblebee gravity, we can potentially test this model with the available astrophysical observations of black holes. In this work, we construct a reflection model in bumbl... |
1510.00851 | Karthik Shankar | Karthik H. Shankar | Horizonless, singularity-free, compact shells satisfying NEC | 14 pages, 1 figure | Gen.Rel.Grav. 49 (2017) no.2, 33 | 10.1007/s10714-017-2196-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational collapse singularities are undesirable, yet inevitable to a
large extent in General Relativity. When matter satisfying null energy
condition collapses to the extent a closed trapped surface is formed, a
singularity is inevitable according to Penrose's singularity theorem. Since
positive mass vacuum solu... | [
{
"created": "Sat, 3 Oct 2015 17:45:20 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Feb 2017 18:33:50 GMT",
"version": "v2"
}
] | 2020-03-09 | [
[
"Shankar",
"Karthik H.",
""
]
] | Gravitational collapse singularities are undesirable, yet inevitable to a large extent in General Relativity. When matter satisfying null energy condition collapses to the extent a closed trapped surface is formed, a singularity is inevitable according to Penrose's singularity theorem. Since positive mass vacuum soluti... |
1702.06991 | Subhajit Saha | Subenoy Chakraborty and Subhajit Saha | Quantum Tunnelling for Hawking Radiation from Both Static and Dynamic
Black Holes | 15 pages | Advances in High Energy Physics 2014, 168487 (2014) | 10.1155/2014/168487 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper deals with Hawking radiation from both a general static black hole
and a nonstatic spherically symmetric black hole. In case of static black hole,
tunnelling of nonzero mass particles is considered and due to complicated
calculations, quantum corrections are calculated only up to the first order.
The result... | [
{
"created": "Sat, 18 Feb 2017 16:53:46 GMT",
"version": "v1"
}
] | 2017-02-24 | [
[
"Chakraborty",
"Subenoy",
""
],
[
"Saha",
"Subhajit",
""
]
] | The paper deals with Hawking radiation from both a general static black hole and a nonstatic spherically symmetric black hole. In case of static black hole, tunnelling of nonzero mass particles is considered and due to complicated calculations, quantum corrections are calculated only up to the first order. The results ... |
1612.05480 | Jaume Haro | Llibert Arest\'e Sal\'o, Jaume Amor\'os and Jaume de Haro | Qualitative study in Loop Quantum Cosmology | 12 pages, 7 figures. Version accepted for publication in CQG | Class.Quant.Grav. 34 (2017) no.23, 235001 | 10.1088/1361-6382/aa9311 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work contains a detailed qualitative analysis, in General Relativity and
in Loop Quantum Cosmology, of the dynamics in the associated phase space of a
scalar field minimally coupled with gravity, whose potential mimics the
dynamics of a perfect fluid with a linear Equation of State (EoS). Dealing with
the orbits... | [
{
"created": "Fri, 16 Dec 2016 14:23:47 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Dec 2016 11:45:25 GMT",
"version": "v2"
},
{
"created": "Fri, 13 Oct 2017 07:03:07 GMT",
"version": "v3"
}
] | 2017-11-09 | [
[
"Saló",
"Llibert Aresté",
""
],
[
"Amorós",
"Jaume",
""
],
[
"de Haro",
"Jaume",
""
]
] | This work contains a detailed qualitative analysis, in General Relativity and in Loop Quantum Cosmology, of the dynamics in the associated phase space of a scalar field minimally coupled with gravity, whose potential mimics the dynamics of a perfect fluid with a linear Equation of State (EoS). Dealing with the orbits (... |
gr-qc/0304057 | Bei-Lok Hu | B. L. Hu, Albert Roura, Sukanya Sinha, E. Verdaguer | Quantum Noise and Fluctuations in Gravitation and Cosmology | 16 pages Latex; small changes in a couple of footnotes | null | 10.1117/12.488949 | umdpp 03-045 | gr-qc | null | We give a short update of our research program on nonequilibrium statistical
field theory applied to quantum processes in the early universe and black
holes, as well as the development of stochastic gravity theory as an extension
of semiclassical gravity and an intermediary in the 'bottom-up' approach to
quantum grav... | [
{
"created": "Tue, 15 Apr 2003 13:16:13 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Apr 2003 18:59:02 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Hu",
"B. L.",
""
],
[
"Roura",
"Albert",
""
],
[
"Sinha",
"Sukanya",
""
],
[
"Verdaguer",
"E.",
""
]
] | We give a short update of our research program on nonequilibrium statistical field theory applied to quantum processes in the early universe and black holes, as well as the development of stochastic gravity theory as an extension of semiclassical gravity and an intermediary in the 'bottom-up' approach to quantum gravit... |
gr-qc/0404100 | Jorma Louko | Jorma Louko, Alberto Molgado | Refined algebraic quantisation with the triangular subgroup of SL(2,R) | 30 pages. LaTeX with amsfonts, amsmath, amssymb. (v4: Typos
corrected. Published version.) | Int.J.Mod.Phys. D14 (2005) 1131 | 10.1142/S0218271805006894 | null | gr-qc hep-th math-ph math.MP | null | We investigate refined algebraic quantisation with group averaging in a
constrained Hamiltonian system whose gauge group is the connected component of
the lower triangular subgroup of SL(2,R). The unreduced phase space is
T^*R^{p+q} with p>0 and q>0, and the system has a distinguished classical
o(p,q) observable alge... | [
{
"created": "Fri, 23 Apr 2004 17:33:11 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Dec 2004 13:17:11 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Jun 2005 17:52:50 GMT",
"version": "v3"
},
{
"created": "Mon, 15 Aug 2005 09:52:13 GMT",
"version": "v4"
}
] | 2009-11-10 | [
[
"Louko",
"Jorma",
""
],
[
"Molgado",
"Alberto",
""
]
] | We investigate refined algebraic quantisation with group averaging in a constrained Hamiltonian system whose gauge group is the connected component of the lower triangular subgroup of SL(2,R). The unreduced phase space is T^*R^{p+q} with p>0 and q>0, and the system has a distinguished classical o(p,q) observable algebr... |
1009.1136 | Steven Carlip | Steven Carlip | The Small Scale Structure of Spacetime | 14 pages, two eps figures; to appear in Foundations of Space and
Time, edited by George Ellis, Jeff Murugan, Amanda Weltman (Cambridge
University Press) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Several lines of evidence hint that quantum gravity at very small distances
may be effectively two-dimensional. I summarize the evidence for such
``spontaneous dimensional reduction,'' and suggest an additional argument
coming from the strong-coupling limit of the Wheeler-DeWitt equation. If this
description proves t... | [
{
"created": "Mon, 6 Sep 2010 19:47:59 GMT",
"version": "v1"
}
] | 2010-09-07 | [
[
"Carlip",
"Steven",
""
]
] | Several lines of evidence hint that quantum gravity at very small distances may be effectively two-dimensional. I summarize the evidence for such ``spontaneous dimensional reduction,'' and suggest an additional argument coming from the strong-coupling limit of the Wheeler-DeWitt equation. If this description proves to ... |
gr-qc/0310070 | Joan Josep Ferrando | Joan Josep Ferrando and Juan Antonio S\'aez | Type I vacuum solutions with aligned Papapetrou fields: an intrinsic
characterization | 14 pages; v2: added new section, references and table | J.Math.Phys. 47 (2006) 112501 | 10.1063/1.2363258 | null | gr-qc | null | We show that Petrov type I vacuum solutions admitting a Killing vector whose
Papapetrou field is aligned with a principal bivector of the Weyl tensor are
the Kasner and Taub metrics, their counterpart with timelike orbits and their
associated windmill-like solutions, as well as the Petrov homogeneous vacuum
solution.... | [
{
"created": "Tue, 14 Oct 2003 13:30:08 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Nov 2006 14:34:43 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Ferrando",
"Joan Josep",
""
],
[
"Sáez",
"Juan Antonio",
""
]
] | We show that Petrov type I vacuum solutions admitting a Killing vector whose Papapetrou field is aligned with a principal bivector of the Weyl tensor are the Kasner and Taub metrics, their counterpart with timelike orbits and their associated windmill-like solutions, as well as the Petrov homogeneous vacuum solution. W... |
gr-qc/9811055 | Laszlo A. Gergely | L\'aszl\'o \'A. Gergely, Zolt\'an Perj\'es and M\'aty\'as Vas\'uth | Spin effects in radiating compact binaries | 4 pages, 1 figure, sprocl.sty included, to appear in the Proceedings
of the ERES98 Conference | null | null | null | gr-qc | null | We review and summarize our results concerning the influence of the spins of
a compact binary system on the motion of the binary and on its gravitational
reaction. We describe briefly our method which lead us to compute the secular
changes in the post-Newtonian motion and the averaged radiative losses. Our
descriptio... | [
{
"created": "Tue, 17 Nov 1998 14:54:59 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gergely",
"László Á.",
""
],
[
"Perjés",
"Zoltán",
""
],
[
"Vasúth",
"Mátyás",
""
]
] | We review and summarize our results concerning the influence of the spins of a compact binary system on the motion of the binary and on its gravitational reaction. We describe briefly our method which lead us to compute the secular changes in the post-Newtonian motion and the averaged radiative losses. Our description ... |
1911.09519 | Iver Brevik | I. Brevik and A. V. Timoshkin | Viscous Fluid Holographic Bounce | 10 pages; to appear in International Journal of Geometric Methods in
Modern Physics | Int. J. Geometric Methods in Mod. Phys. 2050023 (2020) | 10.1142/S0219887820500231 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate bounce cosmological models in the presence of a viscous fluid,
making use of generalized holographic cutoffs introduced by Nojiri and Odintsov
(2017). We consider both an exponential, a power-law, and a double exponential
form for the scale factor. By use of these models we calculate expressions for
in... | [
{
"created": "Thu, 21 Nov 2019 15:06:09 GMT",
"version": "v1"
}
] | 2019-12-25 | [
[
"Brevik",
"I.",
""
],
[
"Timoshkin",
"A. V.",
""
]
] | We investigate bounce cosmological models in the presence of a viscous fluid, making use of generalized holographic cutoffs introduced by Nojiri and Odintsov (2017). We consider both an exponential, a power-law, and a double exponential form for the scale factor. By use of these models we calculate expressions for infr... |
2111.01130 | Jean Pierre Gazeau | Gilles Cohen-Tannoudji and Jean-Pierre Gazeau | Cold Dark Matter: A Gluonic Bose--Einstein Condensate in Anti-de Sitter
Space Time | This article belongs to the Special Issue Selected Papers from the
1st International Electronic Conference on Universe (ECU 2021) | Universe 2021 | 10.3390/universe7110402 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | In the same way as the realization of some of the famous gedanken experiments
imagined by the founding fathers of quantum mechanics has recently led to the
current renewal of the interpretation of quantum physics, it seems that the
most recent progresses of observational astrophysics can be interpreted as the
realiza... | [
{
"created": "Sat, 30 Oct 2021 17:55:18 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Nov 2021 10:45:31 GMT",
"version": "v2"
}
] | 2021-11-19 | [
[
"Cohen-Tannoudji",
"Gilles",
""
],
[
"Gazeau",
"Jean-Pierre",
""
]
] | In the same way as the realization of some of the famous gedanken experiments imagined by the founding fathers of quantum mechanics has recently led to the current renewal of the interpretation of quantum physics, it seems that the most recent progresses of observational astrophysics can be interpreted as the realizati... |
0803.3641 | Jiri Kovar | Zdenek Stuchlik and Jiri Kovar | Pseudo-Newtonian gravitational potential for Schwarzschild-de Sitter
spacetimes | 17 pages, 11 figures, accepted by International Journal of Modern
Physics D (2008) | null | 10.1142/S021827180801373X | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Pseudo-Newtonian gravitational potential describing the gravitational field
of static and spherically symmetric black holes in the universe with a
repulsive cosmological constant is introduced. In order to demonstrate the
accuracy of the pseudo-Newtonian approach, the related effective potential for
test-particle mot... | [
{
"created": "Tue, 25 Mar 2008 22:19:59 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Stuchlik",
"Zdenek",
""
],
[
"Kovar",
"Jiri",
""
]
] | Pseudo-Newtonian gravitational potential describing the gravitational field of static and spherically symmetric black holes in the universe with a repulsive cosmological constant is introduced. In order to demonstrate the accuracy of the pseudo-Newtonian approach, the related effective potential for test-particle motio... |
gr-qc/9611032 | Piotr Chrusciel | P.T. Chrusciel and G.J. Galloway | ``Nowhere'' differentiable horizons | 28 pages, Latex with pstricks and graphicx, 4 ps figures | Commun.Math.Phys. 193 (1998) 449-470 | 10.1007/s002200050336 | null | gr-qc | null | It is folklore knowledge amongst general relativists that horizons are well
behaved, continuously differentiable hypersurfaces except perhaps on a
negligible subset one needs not to bother with. We show that this is not the
case, by constructing a Cauchy horizon, as well as a black hole event horizon,
which contain n... | [
{
"created": "Tue, 12 Nov 1996 17:36:57 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Chrusciel",
"P. T.",
""
],
[
"Galloway",
"G. J.",
""
]
] | It is folklore knowledge amongst general relativists that horizons are well behaved, continuously differentiable hypersurfaces except perhaps on a negligible subset one needs not to bother with. We show that this is not the case, by constructing a Cauchy horizon, as well as a black hole event horizon, which contain no ... |
1711.08501 | Emanuel Gallo | Emanuel Gallo and Osvaldo M. Moreschi | Constructing balanced equations of motion for particles in general
relativity: the harmonic gauge case | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based in the framework of article (arXiv:1609.02110), where we have presented
the general problems one encounters in the construction of balanced equations
of motions for particles in relativistic theories of gravity, we present in
this work the explicit balanced equations of motion for a compact object in
general re... | [
{
"created": "Wed, 22 Nov 2017 20:49:52 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Mar 2018 14:14:14 GMT",
"version": "v2"
}
] | 2018-03-15 | [
[
"Gallo",
"Emanuel",
""
],
[
"Moreschi",
"Osvaldo M.",
""
]
] | Based in the framework of article (arXiv:1609.02110), where we have presented the general problems one encounters in the construction of balanced equations of motions for particles in relativistic theories of gravity, we present in this work the explicit balanced equations of motion for a compact object in general rela... |
1110.0041 | Jerzy Matyjasek | Jerzy Matyjasek and Katarzyna Zwierzchowska | Semiclassical lukewarm black holes | null | null | 10.1103/PhysRevD.85.024009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The perturbative solutions to the semiclassical Einstein field equations
describing spherically-symmetric and static lukewarm black hole are
constructed. The source term is composed of the (classical) stress-energy
tensor of the electromagnetic field and the renormalized stress-energy tensor
of the quantized massive ... | [
{
"created": "Fri, 30 Sep 2011 22:03:12 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Matyjasek",
"Jerzy",
""
],
[
"Zwierzchowska",
"Katarzyna",
""
]
] | The perturbative solutions to the semiclassical Einstein field equations describing spherically-symmetric and static lukewarm black hole are constructed. The source term is composed of the (classical) stress-energy tensor of the electromagnetic field and the renormalized stress-energy tensor of the quantized massive sc... |
gr-qc/9911120 | Vladimir Dzhunushaliev | V.Dzhunushaliev and D.Singleton | Experimental test for 5th dimension in Kaluza-Klein gravity | 4 pages, 4 figures, Talk given at the Third Meeting on Constrained
Dynamics and Quantum Gravity, Villasimius (Sardinia), September 13-17, 1999 | Nucl.Phys.Proc.Suppl. 88 (2000) 225-228 | 10.1016/S0920-5632(00)00772-6 | null | gr-qc hep-th | null | Several electric/magnetic charged solutions (dyons) to 5D Kaluza-Klein
gravity on the principal bundle are reviewed. Here we examine the possibility
that these solutions can act as quantum virtual wormholes in spacetime foam
models. By applying a sufficently large, external electric and/or magnetic
field it may be po... | [
{
"created": "Tue, 30 Nov 1999 08:58:50 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Dzhunushaliev",
"V.",
""
],
[
"Singleton",
"D.",
""
]
] | Several electric/magnetic charged solutions (dyons) to 5D Kaluza-Klein gravity on the principal bundle are reviewed. Here we examine the possibility that these solutions can act as quantum virtual wormholes in spacetime foam models. By applying a sufficently large, external electric and/or magnetic field it may be poss... |
0707.0726 | Carsten Gundlach | David Garfinkle, Carsten Gundlach, David Hilditch | Comments on Bona-Masso type slicing conditions in long-term black hole
evolutions | 14 pages, LaTex, psfrag | Class.Quant.Grav.25:075007,2008 | 10.1088/0264-9381/25/7/075007 | null | gr-qc | null | We review in generality why time-independent endstates can be reached in
black hole and collapse simulations, with and without excision. We characterise
the Killing states of the Bona-Masso slicing condition with time derivative
along the normals to the slice ("BMn") as solutions of a mixed
elliptic/hyperbolic differ... | [
{
"created": "Thu, 5 Jul 2007 07:36:32 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Garfinkle",
"David",
""
],
[
"Gundlach",
"Carsten",
""
],
[
"Hilditch",
"David",
""
]
] | We review in generality why time-independent endstates can be reached in black hole and collapse simulations, with and without excision. We characterise the Killing states of the Bona-Masso slicing condition with time derivative along the normals to the slice ("BMn") as solutions of a mixed elliptic/hyperbolic differen... |
1811.02014 | Christian Knoll | Jose Luis Bl\'azquez-Salcedo and Christian Knoll | Quasinormal modes of Dirac spinors in the background of rotating black
holes in four and five dimensions | 16 pages, 7 figures | Class. Quantum Grav. 36 105012 (2019) | 10.1088/1361-6382/ab1882 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the quasinormal modes of massive Dirac spinors in the background of
rotating black holes. In particular, we consider the Kerr geometry as well as
the five dimensional Myers-Perry spacetime with equal angular momenta. We
decouple the equations using the standard methods from the literature. In the
five dimens... | [
{
"created": "Mon, 5 Nov 2018 20:08:16 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Nov 2018 11:38:53 GMT",
"version": "v2"
}
] | 2019-04-30 | [
[
"Blázquez-Salcedo",
"Jose Luis",
""
],
[
"Knoll",
"Christian",
""
]
] | We study the quasinormal modes of massive Dirac spinors in the background of rotating black holes. In particular, we consider the Kerr geometry as well as the five dimensional Myers-Perry spacetime with equal angular momenta. We decouple the equations using the standard methods from the literature. In the five dimensio... |
0812.4993 | Clovis Jacinto de Matos | Clovis Jacinto de Matos | Testing Loop Quantum Gravity and Electromagnetic Dark Energy in
Superconductors | 13 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In 1989 Cabrera and Tate reported an anomalous excess of mass of the Cooper
pairs in rotating thin Niobium rings. So far, this experimental result never
received a proper theoretical explanation in the context of superconductor's
physics. In the present work we argue that what Cabrera and Tate interpreted as
an anoma... | [
{
"created": "Tue, 30 Dec 2008 01:48:58 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Aug 2009 15:05:58 GMT",
"version": "v2"
}
] | 2009-08-06 | [
[
"de Matos",
"Clovis Jacinto",
""
]
] | In 1989 Cabrera and Tate reported an anomalous excess of mass of the Cooper pairs in rotating thin Niobium rings. So far, this experimental result never received a proper theoretical explanation in the context of superconductor's physics. In the present work we argue that what Cabrera and Tate interpreted as an anomalo... |
0807.0347 | Salvatore Capozziello | H. Motavali, S. Capozziello, M. Rowshan Almeh Jog | Scalar-tensor cosmology with R^{-1} curvature correction by Noether
Symmetry | 7 pages | Phys.Lett.B666:10-15,2008 | 10.1016/j.physletb.2008.06.058 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss scalar-tensor cosmology with an extra $R^{-1}$ correction by the
Noether Symmetry Approach. The existence of such a symmetry selects the forms
of the coupling $\omega(\phi)$, of the potential $V(\phi)$ and allows to obtain
physically interesting exact cosmological solutions.
| [
{
"created": "Wed, 2 Jul 2008 13:34:58 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Motavali",
"H.",
""
],
[
"Capozziello",
"S.",
""
],
[
"Jog",
"M. Rowshan Almeh",
""
]
] | We discuss scalar-tensor cosmology with an extra $R^{-1}$ correction by the Noether Symmetry Approach. The existence of such a symmetry selects the forms of the coupling $\omega(\phi)$, of the potential $V(\phi)$ and allows to obtain physically interesting exact cosmological solutions. |
1902.08219 | Prashant Kocherlakota Mr. | Prashant Kocherlakota and Pankaj S. Joshi | An Approach to Stability Analyses in General Relativity via Symplectic
Geometry | 15 pages, 1 figure. Arab. J. Math. (2019) | null | 10.1007/s40065-019-0266-4 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We begin with a review of the statements of non-linear, linear and mode
stability of autonomous dynamical systems in classical mechanics, using
symplectic geometry. We then discuss what the phase space and the Hamiltonian
of general relativity are, what constitutes a dynamical system, and
subsequently draw a formal a... | [
{
"created": "Thu, 21 Feb 2019 19:11:43 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Sep 2019 11:46:58 GMT",
"version": "v2"
}
] | 2020-08-10 | [
[
"Kocherlakota",
"Prashant",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | We begin with a review of the statements of non-linear, linear and mode stability of autonomous dynamical systems in classical mechanics, using symplectic geometry. We then discuss what the phase space and the Hamiltonian of general relativity are, what constitutes a dynamical system, and subsequently draw a formal ana... |
0905.0020 | Peter Shawhan | LIGO Scientific Collaboration: B. P. Abbott, et al | Search for gravitational-wave bursts in the first year of the fifth LIGO
science run | v3: various figure and text edits; submitted to PRD; 26 pages | Phys.Rev.D80:102001,2009 | 10.1103/PhysRevD.80.102001 | LIGO-P080056 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the results obtained from an all-sky search for gravitational-wave
(GW) bursts in the 64-2000 Hz frequency range in data collected by the LIGO
detectors during the first year (November 2005 - November 2006) of their fifth
science run. The total analyzed livetime was 268.6 days. Multiple hierarchical
data a... | [
{
"created": "Fri, 1 May 2009 00:14:26 GMT",
"version": "v1"
},
{
"created": "Tue, 12 May 2009 22:11:21 GMT",
"version": "v2"
},
{
"created": "Wed, 27 May 2009 13:56:57 GMT",
"version": "v3"
},
{
"created": "Tue, 20 Oct 2009 06:23:26 GMT",
"version": "v4"
}
] | 2009-12-04 | [
[
"LIGO Scientific Collaboration",
"",
""
],
[
"Abbott",
"B. P.",
""
]
] | We present the results obtained from an all-sky search for gravitational-wave (GW) bursts in the 64-2000 Hz frequency range in data collected by the LIGO detectors during the first year (November 2005 - November 2006) of their fifth science run. The total analyzed livetime was 268.6 days. Multiple hierarchical data ana... |
1301.1728 | Joel Saavedra | Samuel Lepe and Joel Saavedra | On Ho\v{r}ava-Lifshitz Cosmology | 11 pages, major revision | null | 10.1007/s10509-014-1793-2 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss some aspects of the Horava-Lifshitz cosmology with different
matter components considered as dominants at different stages of the cosmic
evolution (each stage is represented by an equation of state
pressure/density=constant). We compare cosmological solutions from this theory
with their counterparts of Gen... | [
{
"created": "Wed, 9 Jan 2013 00:44:14 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Mar 2013 13:13:05 GMT",
"version": "v2"
},
{
"created": "Tue, 30 Jul 2013 20:14:53 GMT",
"version": "v3"
}
] | 2015-06-12 | [
[
"Lepe",
"Samuel",
""
],
[
"Saavedra",
"Joel",
""
]
] | We discuss some aspects of the Horava-Lifshitz cosmology with different matter components considered as dominants at different stages of the cosmic evolution (each stage is represented by an equation of state pressure/density=constant). We compare cosmological solutions from this theory with their counterparts of Gener... |
2303.12556 | Jo\~ao Lu\'is Rosa | A.S. Lob\~ao, Jo\~ao Lu\'is Rosa, D. Bazeia | Scalar-tensor representation to $f(R,T)-$brane with Gauss-Bonnet gravity | 11 pages, 7 figures | Int.J.Mod.Phys.A (2023) 2350171 | 10.1142/S0217751X23501713 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we generalize the analysis of the $f(R,T)-$brane via the
inclusion of a term proportional to the Gauss-Bonnet invariant. We consider an
action of the form $F(R,G,T)=f(R,T)+\alpha G$, where $T$ is the trace of the
stress-energy tensor, $R$ is the Ricci scalar, and $\alpha$ is a real parameter
that contr... | [
{
"created": "Wed, 22 Mar 2023 13:37:37 GMT",
"version": "v1"
}
] | 2024-01-17 | [
[
"Lobão",
"A. S.",
""
],
[
"Rosa",
"João Luís",
""
],
[
"Bazeia",
"D.",
""
]
] | In this paper, we generalize the analysis of the $f(R,T)-$brane via the inclusion of a term proportional to the Gauss-Bonnet invariant. We consider an action of the form $F(R,G,T)=f(R,T)+\alpha G$, where $T$ is the trace of the stress-energy tensor, $R$ is the Ricci scalar, and $\alpha$ is a real parameter that control... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.