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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0407007 | Luca Lusanna | Luca Lusanna (INFN, Firenze) and Massimo Pauri (Parma University) | The Physical Role of Gravitational and Gauge Degrees of Freedom in
General Relativity - II: Dirac versus Bergmann observables and the
Objectivity of Space-Time | 41 pages, Revtex4 | Gen.Rel.Grav. 38 (2006) 229-267 | 10.1007/s10714-005-0218-5 | null | gr-qc astro-ph hep-th | null | (abridged)The achievements of the present work include: a) A clarification of
the multiple definition given by Bergmann of the concept of {\it (Bergmann)
observable. This clarification leads to the proposal of a {\it main conjecture}
asserting the existence of i) special Dirac's observables which are also
Bergmann's ... | [
{
"created": "Thu, 1 Jul 2004 16:09:22 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Lusanna",
"Luca",
"",
"INFN, Firenze"
],
[
"Pauri",
"Massimo",
"",
"Parma University"
]
] | (abridged)The achievements of the present work include: a) A clarification of the multiple definition given by Bergmann of the concept of {\it (Bergmann) observable. This clarification leads to the proposal of a {\it main conjecture} asserting the existence of i) special Dirac's observables which are also Bergmann's ob... |
2307.03636 | Alvaro Torres-Caballeros | Jer\'onimo Cortez, Beatriz Elizaga Navascu\'es, Guillermo A. Mena
Marug\'an, Alvaro Torres-Caballeros, Jos\'e M. Velhinho | Fock quantization of a Klein-Gordon field in the interior geometry of a
nonrotating black hole | 13 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the canonical quantization of a scalar field in a Kantowski-Sachs
spacetime. For simplicity, we consider compactified spatial sections, since
this does not affect the ultraviolet behavior. A time-dependent canonical
transformation is performed prior to quantization. As in previously studied
cases, the purpos... | [
{
"created": "Fri, 7 Jul 2023 14:50:26 GMT",
"version": "v1"
}
] | 2023-07-10 | [
[
"Cortez",
"Jerónimo",
""
],
[
"Navascués",
"Beatriz Elizaga",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
],
[
"Torres-Caballeros",
"Alvaro",
""
],
[
"Velhinho",
"José M.",
""
]
] | We study the canonical quantization of a scalar field in a Kantowski-Sachs spacetime. For simplicity, we consider compactified spatial sections, since this does not affect the ultraviolet behavior. A time-dependent canonical transformation is performed prior to quantization. As in previously studied cases, the purpose ... |
1012.4180 | Giovanni Salesi | S. Esposito and G. Salesi | Black hole dynamical evolution in a Lorentz-violating spacetime | 8 pages, 8 figures | Phys.Rev.D83:084043,2011 | 10.1103/PhysRevD.83.084043 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the black hole dynamical evolution in the framework of a
Lorentz-violating spacetime endowed with a Schwarzchild-like momentum-dependent
metric. Large deviations from the Hawking-Bekenstein predictions are obtained,
depending on the values of the Lorentz-violating parameter lambda introduced. A
non-trivia... | [
{
"created": "Sun, 19 Dec 2010 16:37:15 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Jun 2011 06:27:01 GMT",
"version": "v2"
}
] | 2011-06-14 | [
[
"Esposito",
"S.",
""
],
[
"Salesi",
"G.",
""
]
] | We consider the black hole dynamical evolution in the framework of a Lorentz-violating spacetime endowed with a Schwarzchild-like momentum-dependent metric. Large deviations from the Hawking-Bekenstein predictions are obtained, depending on the values of the Lorentz-violating parameter lambda introduced. A non-trivial ... |
1809.03906 | Ricardo Monteiro | Ricardo Monteiro, Isobel Nicholson, Donal O'Connell | Spinor-helicity and the algebraic classification of higher-dimensional
spacetimes | 47 pages, 3 figures, 15 tables. v2: minor changes | Class.Quant.Grav. 36 (2019) 065006 | 10.1088/1361-6382/ab03df | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spinor-helicity formalism is an essential technique of the amplitudes
community. We draw on this method to construct a scheme for classifying
higher-dimensional spacetimes in the style of the four-dimensional Petrov
classification and the Newman-Penrose formalism. We focus on the
five-dimensional case for concret... | [
{
"created": "Tue, 11 Sep 2018 14:02:44 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Apr 2019 10:25:28 GMT",
"version": "v2"
}
] | 2019-04-02 | [
[
"Monteiro",
"Ricardo",
""
],
[
"Nicholson",
"Isobel",
""
],
[
"O'Connell",
"Donal",
""
]
] | The spinor-helicity formalism is an essential technique of the amplitudes community. We draw on this method to construct a scheme for classifying higher-dimensional spacetimes in the style of the four-dimensional Petrov classification and the Newman-Penrose formalism. We focus on the five-dimensional case for concreten... |
2311.08437 | Gamal G.L. Nashed | G.G.L. Nashed and Kazuharu Bamba | Solutions of a slowly rotating Kerr flat-horizon black hole in dynamical
Chern-Simons modified gravity | 10 pages | EPL 144 29002 (2023) | 10.1209/0295-5075/ad01d8 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Solutions pertaining to a Kerr black hole with a flat horizon undergoing
gradual rotation are explored in the context of gravitational theories modified
by dynamical Chern-Simons terms with cylindrical metrics, which approach
asymptotically the anti de Sitter spacetime. It is shown that the cross-term of
a metric com... | [
{
"created": "Tue, 14 Nov 2023 12:12:34 GMT",
"version": "v1"
}
] | 2023-11-16 | [
[
"Nashed",
"G. G. L.",
""
],
[
"Bamba",
"Kazuharu",
""
]
] | Solutions pertaining to a Kerr black hole with a flat horizon undergoing gradual rotation are explored in the context of gravitational theories modified by dynamical Chern-Simons terms with cylindrical metrics, which approach asymptotically the anti de Sitter spacetime. It is shown that the cross-term of a metric compo... |
gr-qc/9808042 | Michael E. Peskin | Erast B. Gliner | Scalar Black Holes | 14 pages, latex | null | null | null | gr-qc | null | A class of exact regular spherically symmetric solutions to the Einstein
equation obeying Dymnikova's definition of the vacuumlike state is considered.
These solutions, which may be interpreted as black holes, are not only
singularity free, but also do not set us thinking about the loss of information
under gravitati... | [
{
"created": "Fri, 14 Aug 1998 22:13:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gliner",
"Erast B.",
""
]
] | A class of exact regular spherically symmetric solutions to the Einstein equation obeying Dymnikova's definition of the vacuumlike state is considered. These solutions, which may be interpreted as black holes, are not only singularity free, but also do not set us thinking about the loss of information under gravitation... |
1912.02459 | Jibril Ben Achour | Denis Arruga, Jibril Ben Achour, Karim Noui | Deformed General Relativity and Quantum Black Holes Interior | 29 pages, invited contribution to special Issue: "Probing New Physics
with Black holes", Matched the published version in Universe | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Effective models of black holes interior have led to several proposals for
regular black holes. In the so-called polymer models, based on effective
deformations of the phase space of spherically symmetric general relativity in
vacuum, one considers a deformed Hamiltonian constraint while keeping a
non-deformed vector... | [
{
"created": "Thu, 5 Dec 2019 09:40:55 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Mar 2020 09:54:23 GMT",
"version": "v2"
}
] | 2020-03-11 | [
[
"Arruga",
"Denis",
""
],
[
"Achour",
"Jibril Ben",
""
],
[
"Noui",
"Karim",
""
]
] | Effective models of black holes interior have led to several proposals for regular black holes. In the so-called polymer models, based on effective deformations of the phase space of spherically symmetric general relativity in vacuum, one considers a deformed Hamiltonian constraint while keeping a non-deformed vectoria... |
1801.03353 | Ward Struyve | Nelson Pinto-Neto, Ward Struyve | Bohmian quantum gravity and cosmology | 45 pages, 6 figures, PDFLaTeX; written for "Applied Bohmian
Mechanics: From Nanoscale Systems to Cosmology", edited by Xavier Oriols
Pladevall and Jordi Mompart; v2 typos corrected | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravity aims to describe gravity in quantum mechanical terms. How
exactly this needs to be done remains an open question. Various proposals have
been put on the table, such as canonical quantum gravity, loop quantum gravity,
string theory, etc. These proposals often encounter technical and conceptual
problems... | [
{
"created": "Wed, 10 Jan 2018 12:48:17 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Aug 2019 16:15:16 GMT",
"version": "v2"
}
] | 2019-08-22 | [
[
"Pinto-Neto",
"Nelson",
""
],
[
"Struyve",
"Ward",
""
]
] | Quantum gravity aims to describe gravity in quantum mechanical terms. How exactly this needs to be done remains an open question. Various proposals have been put on the table, such as canonical quantum gravity, loop quantum gravity, string theory, etc. These proposals often encounter technical and conceptual problems. ... |
1811.04647 | Sohyun Park | Yi-Zen Chu, Sohyun Park | Does nonlocal gravity yield divergent gravitational energy-momentum
fluxes? | 21 pages, no figures, comments welcome; v2: references added; v3:
corrected typos and added more references | Phys. Rev. D 99, 044052 (2019) | 10.1103/PhysRevD.99.044052 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Energy-momentum conservation requires the associated gravitational fluxes on
an asymptotically flat spacetime to scale as $1/r^2$, as $r \to \infty$, where
$r$ is the distance between the observer and the source of the gravitational
waves. We expand the equations-of-motion for the Deser-Woodard nonlocal gravity
model... | [
{
"created": "Mon, 12 Nov 2018 10:43:27 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Nov 2018 18:10:48 GMT",
"version": "v2"
},
{
"created": "Sun, 13 Jan 2019 16:25:17 GMT",
"version": "v3"
}
] | 2019-03-06 | [
[
"Chu",
"Yi-Zen",
""
],
[
"Park",
"Sohyun",
""
]
] | Energy-momentum conservation requires the associated gravitational fluxes on an asymptotically flat spacetime to scale as $1/r^2$, as $r \to \infty$, where $r$ is the distance between the observer and the source of the gravitational waves. We expand the equations-of-motion for the Deser-Woodard nonlocal gravity model u... |
1509.03493 | Bogeun Gwak | Bogeun Gwak, Bum-Hoon Lee, Daeho Ro | Instability of Charged Anti-de Sitter Black Holes | 12 pages, 5 figures | Phys. Lett. B761 (2016) 437-443 | 10.1016/j.physletb.2016.08.015 | APCTP Pre2015-024 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the instability of charged anti-de Sitter black holes in four or
higher-dimension under fragmentation. The instability of fragmentation breaks
the black hole into two black holes. We have found that the region near
extremal or massive black holes become unstable under fragmentation. These
regions depend not ... | [
{
"created": "Fri, 11 Sep 2015 13:12:54 GMT",
"version": "v1"
}
] | 2017-12-01 | [
[
"Gwak",
"Bogeun",
""
],
[
"Lee",
"Bum-Hoon",
""
],
[
"Ro",
"Daeho",
""
]
] | We study the instability of charged anti-de Sitter black holes in four or higher-dimension under fragmentation. The instability of fragmentation breaks the black hole into two black holes. We have found that the region near extremal or massive black holes become unstable under fragmentation. These regions depend not on... |
1904.06343 | Pasquale Bosso | Pasquale Bosso, Octavio Obreg\'on | Minimal Length Effects on Quantum Cosmology and Quantum Black Hole
Models | 7 pages, 5 figures | Class.Quant.Grav. 37 (2020) no.4, 045003 | 10.1088/1361-6382/ab6038 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Kantowski-Sachs model with a modified quantization prescription is
considered. Such quantization rules, inspired by the so-called Generalized
Uncertainty Principle (GUP), correspond to a modified commutation relation
between minisuperspace variables and their conjugate momenta. For a wide range
of the modification ... | [
{
"created": "Fri, 12 Apr 2019 17:52:41 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Feb 2020 00:55:14 GMT",
"version": "v2"
}
] | 2020-02-06 | [
[
"Bosso",
"Pasquale",
""
],
[
"Obregón",
"Octavio",
""
]
] | A Kantowski-Sachs model with a modified quantization prescription is considered. Such quantization rules, inspired by the so-called Generalized Uncertainty Principle (GUP), correspond to a modified commutation relation between minisuperspace variables and their conjugate momenta. For a wide range of the modification pa... |
1302.5358 | Benjamin Eltzner | Benjamin Eltzner | Quantization of Perturbations in Inflation | 25 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The derivation of the angular spectrum of temperature perturbations of the
cosmic microwave background relies on the quantization of field and metric
perturbations in the inflationary phase. The quantization procedure thus
deserves a close examination. As the background spacetime on which the degrees
of freedom that ... | [
{
"created": "Thu, 21 Feb 2013 18:08:20 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Feb 2013 13:48:09 GMT",
"version": "v2"
},
{
"created": "Thu, 15 Aug 2013 11:47:04 GMT",
"version": "v3"
}
] | 2013-08-16 | [
[
"Eltzner",
"Benjamin",
""
]
] | The derivation of the angular spectrum of temperature perturbations of the cosmic microwave background relies on the quantization of field and metric perturbations in the inflationary phase. The quantization procedure thus deserves a close examination. As the background spacetime on which the degrees of freedom that ar... |
2304.11492 | Genly Le\'on | Kimet Jusufi (State U., Tetova), Genly Leon (Catolica del Norte U. and
DUT, Durban) and Alfredo D. Millano (Catolica del Norte U.) | Dark Universe Phenomenology from Yukawa Potential? | 13 pages, 4 figures, final version | Phys. Dark Univ. 42 (2023), 101318 | 10.1016/j.dark.2023.101318 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that the effect of cold dark matter in the cosmological setup can be
explained by the coupling between the baryonic matter particles in terms of the
long-range force having a graviton mass $m_g$ via the Yukawa gravitational
potential. Such a quantum-corrected Yukawa-like gravitational potential is
characteri... | [
{
"created": "Sat, 22 Apr 2023 22:55:59 GMT",
"version": "v1"
},
{
"created": "Tue, 14 May 2024 20:14:21 GMT",
"version": "v2"
}
] | 2024-05-16 | [
[
"Jusufi",
"Kimet",
"",
"State U., Tetova"
],
[
"Leon",
"Genly",
"",
"Catolica del Norte U. and\n DUT, Durban"
],
[
"Millano",
"Alfredo D.",
"",
"Catolica del Norte U."
]
] | We argue that the effect of cold dark matter in the cosmological setup can be explained by the coupling between the baryonic matter particles in terms of the long-range force having a graviton mass $m_g$ via the Yukawa gravitational potential. Such a quantum-corrected Yukawa-like gravitational potential is characterize... |
2005.01762 | K. Sravan Kumar | K. Sravan Kumar, Shubham Maheshwari, Anupam Mazumdar and Jun Peng | Stable, non-singular bouncing universe with only a scalar mode | 5 pages, 1 figure | Phys. Rev. D 102, 024080 (2020) | 10.1103/PhysRevD.102.024080 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study a class of higher derivative, non-local gravity which
admits homogeneous and isotropic non-singular, bouncing universes in the
absence of matter. At the linearized level, the theory propagates only a scalar
degree of freedom, and no vector or tensor modes. The scalar can be made free
from pert... | [
{
"created": "Mon, 4 May 2020 18:03:59 GMT",
"version": "v1"
}
] | 2020-07-28 | [
[
"Kumar",
"K. Sravan",
""
],
[
"Maheshwari",
"Shubham",
""
],
[
"Mazumdar",
"Anupam",
""
],
[
"Peng",
"Jun",
""
]
] | In this paper, we study a class of higher derivative, non-local gravity which admits homogeneous and isotropic non-singular, bouncing universes in the absence of matter. At the linearized level, the theory propagates only a scalar degree of freedom, and no vector or tensor modes. The scalar can be made free from pertur... |
1907.03545 | Grigoris Panotopoulos | Grigoris Panotopoulos and \'Angel Rinc\'on | Relativistic strange quark stars in Lovelock gravity | 10 pages, 1 table, 3 figures, accepted for publication in EPJ Plus | null | null | null | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study relativistic non-rotating stars in the framework of Lovelock
gravity. In particular, we consider the Gauss-Bonnet term in a five-dimensional
spacetime, and we investigate the impact of the Gauss-Bonnet parameter on
properties of the stars, both isotropic and anisotropic. For matter inside the
star, we assume... | [
{
"created": "Fri, 5 Jul 2019 10:21:28 GMT",
"version": "v1"
}
] | 2019-07-09 | [
[
"Panotopoulos",
"Grigoris",
""
],
[
"Rincón",
"Ángel",
""
]
] | We study relativistic non-rotating stars in the framework of Lovelock gravity. In particular, we consider the Gauss-Bonnet term in a five-dimensional spacetime, and we investigate the impact of the Gauss-Bonnet parameter on properties of the stars, both isotropic and anisotropic. For matter inside the star, we assume a... |
1309.3605 | Nicholas Taylor | Nicholas W. Taylor, Michael Boyle, Christian Reisswig, Mark A. Scheel,
Tony Chu, Lawrence E. Kidder, Bela Szilagyi | Comparing Gravitational Waveform Extrapolation to Cauchy-Characteristic
Extraction in Binary Black Hole Simulations | 26 pages, 20 figures | Phys. Rev. D 88, 124010 (2013) | 10.1103/PhysRevD.88.124010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extract gravitational waveforms from numerical simulations of black hole
binaries computed using the Spectral Einstein Code. We compare two extraction
methods: direct construction of the Newman-Penrose (NP) scalar $\Psi_4$ at a
finite distance from the source and Cauchy-characteristic extraction (CCE). The
direct ... | [
{
"created": "Fri, 13 Sep 2013 23:14:13 GMT",
"version": "v1"
}
] | 2013-12-16 | [
[
"Taylor",
"Nicholas W.",
""
],
[
"Boyle",
"Michael",
""
],
[
"Reisswig",
"Christian",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Chu",
"Tony",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Szilagyi",
"Bela",
""
]
... | We extract gravitational waveforms from numerical simulations of black hole binaries computed using the Spectral Einstein Code. We compare two extraction methods: direct construction of the Newman-Penrose (NP) scalar $\Psi_4$ at a finite distance from the source and Cauchy-characteristic extraction (CCE). The direct NP... |
1807.01528 | Naoki Tsukamoto | Naoki Tsukamoto and Takafumi Kokubu | Linear stability analysis of a rotating thin-shell wormhole | 8 pages, 3 figures, title changed, minor correction, references
added, accepted for publication in Physical Review D | Phys. Rev. D 98, 044026 (2018) | 10.1103/PhysRevD.98.044026 | RUP-18-21, KEK-TH-2059, KEK-Cosmo-227 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We cut and paste two Banados-Teitelboim-Zanelli (BTZ) spacetimes at a throat
by the Darmois-Israel method to construct a rotating wormhole with a thin shell
filled with a barotropic fluid. The thin shell at the throat and both sides of
the throat corotate. We investigate the linear stability of the thin shell of
the ... | [
{
"created": "Wed, 4 Jul 2018 11:59:55 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Aug 2018 06:40:34 GMT",
"version": "v2"
}
] | 2018-08-16 | [
[
"Tsukamoto",
"Naoki",
""
],
[
"Kokubu",
"Takafumi",
""
]
] | We cut and paste two Banados-Teitelboim-Zanelli (BTZ) spacetimes at a throat by the Darmois-Israel method to construct a rotating wormhole with a thin shell filled with a barotropic fluid. The thin shell at the throat and both sides of the throat corotate. We investigate the linear stability of the thin shell of the ro... |
0802.0157 | Roberto Giambo' | Roberto Giamb\'o, Fabio Giannoni, Giulio Magli | The dynamical behaviour of homogeneous scalar-field spacetimes with
general self-interaction potentials | 9 pages, 2 figures; some typos corrected, final discussion added | Gen.Rel.Grav.41:21-30,2009 | 10.1007/s10714-008-0647-z | null | gr-qc | null | The dynamics of homogeneous Robertson--Walker cosmological models with a
self-interacting scalar field source is examined here in full generality,
requiring only the scalar field potential to be bounded from below and
divergent when the field diverges. In this way we are able to give a unified
treatment of all the al... | [
{
"created": "Fri, 1 Feb 2008 16:27:44 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Apr 2008 06:36:01 GMT",
"version": "v2"
}
] | 2009-01-16 | [
[
"Giambó",
"Roberto",
""
],
[
"Giannoni",
"Fabio",
""
],
[
"Magli",
"Giulio",
""
]
] | The dynamics of homogeneous Robertson--Walker cosmological models with a self-interacting scalar field source is examined here in full generality, requiring only the scalar field potential to be bounded from below and divergent when the field diverges. In this way we are able to give a unified treatment of all the alre... |
0811.0982 | Mohammad Vahid Takook | M. Mohsenzadeh, S. Rouhani and M.V. Takook | Power Spectrum in Krein Space Quantization | 8 pages, appear in Int. J. Theor. Phys | Int J Theor Phys 48(2009)755-762 | 10.1007/s10773-008-9851-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The power spectrum of scalar field and space-time metric perturbations
produced in the process of inflation of universe, have been presented in this
paper by an alternative approach to field quantization namely, Krein space
quantization [1,2]. Auxiliary negative norm states, the modes of which do not
interact with th... | [
{
"created": "Thu, 6 Nov 2008 16:16:41 GMT",
"version": "v1"
}
] | 2009-03-25 | [
[
"Mohsenzadeh",
"M.",
""
],
[
"Rouhani",
"S.",
""
],
[
"Takook",
"M. V.",
""
]
] | The power spectrum of scalar field and space-time metric perturbations produced in the process of inflation of universe, have been presented in this paper by an alternative approach to field quantization namely, Krein space quantization [1,2]. Auxiliary negative norm states, the modes of which do not interact with the ... |
1705.02715 | Hor\'acio Vieira | H. S. Vieira, J. P. Morais Gra\c{c}a and V. B. Bezerra | Scalar resonant frequencies and Hawking effect of an $f(R)$ global
monopole | 12 pages, 8 figures | Chinese Physics C 41 (2017) 095102 | 10.1088/1674-1137/41/9/095102 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Massive scalar fields are considered in the gravitational field produced by a
Schwarzschild black hole with a global monopole in $f(R)$ gravity. The exact
solution of the radial part of the Klein-Gordon equation in this background is
obtained and is given in terms of the general Heun functions. We apply the
propertie... | [
{
"created": "Mon, 8 May 2017 00:48:40 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jun 2017 14:38:01 GMT",
"version": "v2"
}
] | 2017-06-28 | [
[
"Vieira",
"H. S.",
""
],
[
"Graça",
"J. P. Morais",
""
],
[
"Bezerra",
"V. B.",
""
]
] | Massive scalar fields are considered in the gravitational field produced by a Schwarzschild black hole with a global monopole in $f(R)$ gravity. The exact solution of the radial part of the Klein-Gordon equation in this background is obtained and is given in terms of the general Heun functions. We apply the properties ... |
gr-qc/0005022 | Yoshiyuki Morisawa | Yoshiyuki Morisawa, Ryo Yamazaki, Daisuke Ida, Akihiro Ishibashi and
Ken-ichi Nakao | Thick Domain Walls Intersecting a Black Hole | 14 pages, 8 figures | Phys.Rev. D62 (2000) 084022 | 10.1103/PhysRevD.62.084022 | YITP-00-17, KUNS-1657 | gr-qc | null | We discuss the gravitationally interacting system of a thick domain wall and
a black hole. We numerically solve the scalar field equation in the
Schwarzschild spacetime and show that there exist scalar field configurations
representing thick domain walls intersecting the black hole.
| [
{
"created": "Mon, 8 May 2000 13:08:01 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Morisawa",
"Yoshiyuki",
""
],
[
"Yamazaki",
"Ryo",
""
],
[
"Ida",
"Daisuke",
""
],
[
"Ishibashi",
"Akihiro",
""
],
[
"Nakao",
"Ken-ichi",
""
]
] | We discuss the gravitationally interacting system of a thick domain wall and a black hole. We numerically solve the scalar field equation in the Schwarzschild spacetime and show that there exist scalar field configurations representing thick domain walls intersecting the black hole. |
1107.2743 | Zou De Cheng | Rui-Hong Yue, De-Cheng Zou, Tian-Yi Yu and Zhan-Ying Yang | A new metric for rotating black holes in Gauss-Bonnet gravity | 9 pages | Chin.Phys.B20:050401,2011 | 10.1088/1674-1056/20/5/050401 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents a new metric and studies slowly rotating Gauss-Bonnet
black holes with one nonvanishing angular momentum in five dimensional anti-de
Sitter spaces. Taking the angular momentum parameter $a$ up to second order,
the slowly rotating black hole solutions are obtained by working directly in
the action.... | [
{
"created": "Thu, 14 Jul 2011 07:02:06 GMT",
"version": "v1"
}
] | 2011-10-04 | [
[
"Yue",
"Rui-Hong",
""
],
[
"Zou",
"De-Cheng",
""
],
[
"Yu",
"Tian-Yi",
""
],
[
"Yang",
"Zhan-Ying",
""
]
] | This paper presents a new metric and studies slowly rotating Gauss-Bonnet black holes with one nonvanishing angular momentum in five dimensional anti-de Sitter spaces. Taking the angular momentum parameter $a$ up to second order, the slowly rotating black hole solutions are obtained by working directly in the action. I... |
gr-qc/0111110 | Dag Østvang | Dag {\O}stvang | A Non-Metric Approach to Space, Time and Gravitation | Doctoral thesis, 142(+6) pages, 2 figures, LaTeX; v8: ambiguous
predictions eliminated; v10: inconsistent mass integral corrected page 139;
v11: corrections pp. 115-118, v13: must have non-universal gravitational
coupling; v14: rewritten with fully coupled theory; v15: major revision
(fully coupled theory aband... | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this thesis, a non-standard geometric framework, the "quasi-metric"
framework (QMF), is used to define relativistic space-time. The QMF consists of
a 4-dimensional space-time manifold equipped with two one-parameter families of
Lorentzian 4-metrics ${\bf g}_t$ and ${\bf {\bar g}}_t$ parametrized by a
(unique) glob... | [
{
"created": "Fri, 30 Nov 2001 02:42:02 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Feb 2005 07:51:41 GMT",
"version": "v10"
},
{
"created": "Thu, 16 Jun 2005 23:33:18 GMT",
"version": "v11"
},
{
"created": "Tue, 6 Dec 2005 05:11:52 GMT",
"version": "v12"
},
{
... | 2024-03-27 | [
[
"Østvang",
"Dag",
""
]
] | In this thesis, a non-standard geometric framework, the "quasi-metric" framework (QMF), is used to define relativistic space-time. The QMF consists of a 4-dimensional space-time manifold equipped with two one-parameter families of Lorentzian 4-metrics ${\bf g}_t$ and ${\bf {\bar g}}_t$ parametrized by a (unique) global... |
1004.5487 | Parthasarathi Majumdar | Romesh K. Kaul and Parthasarathi Majumdar | Schwarzschild horizon dynamics and SU(2) Chern-Simons theory | 22 pages Latex, no figures, version accepted for publication in
Physical Review D | Phys.Rev.D83:024038,2011 | 10.1103/PhysRevD.83.024038 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the effect of different choices in partial gauge fixing of bulk
local Lorentz invariance, on the description of the horizon degrees of freedom
of a Schwarzschild black hole as an SU(2) Chern-Simons theory with specific
sources. A classically equivalent description in terms of an ISO(2)
Chern-Simons theory ... | [
{
"created": "Fri, 30 Apr 2010 10:04:39 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Dec 2010 06:55:49 GMT",
"version": "v2"
}
] | 2015-03-17 | [
[
"Kaul",
"Romesh K.",
""
],
[
"Majumdar",
"Parthasarathi",
""
]
] | We discuss the effect of different choices in partial gauge fixing of bulk local Lorentz invariance, on the description of the horizon degrees of freedom of a Schwarzschild black hole as an SU(2) Chern-Simons theory with specific sources. A classically equivalent description in terms of an ISO(2) Chern-Simons theory is... |
1804.06717 | Herman Telkamp | Herman Telkamp | Mass in cosmological perspective | 5 pages | Phys. Rev. D 98, 063507 (2018) | 10.1103/PhysRevD.98.063507 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the total nonlocal energy associated with a particle at rest in
the Hubble flow, i.e., the relational energy between this particle and all
connected particles within the causal horizon. The particle, even while at
rest, partakes in relative recessional and peculiar motion of connected
particles in 3 dimen... | [
{
"created": "Sat, 14 Apr 2018 11:16:43 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Sep 2018 20:32:33 GMT",
"version": "v2"
}
] | 2018-09-24 | [
[
"Telkamp",
"Herman",
""
]
] | We consider the total nonlocal energy associated with a particle at rest in the Hubble flow, i.e., the relational energy between this particle and all connected particles within the causal horizon. The particle, even while at rest, partakes in relative recessional and peculiar motion of connected particles in 3 dimensi... |
gr-qc/9808071 | Jonathan Halliwell | J. J. Halliwell | Effective Theories of Coupled Classical and Quantum Variables | 25 pages, plain Tex. To appear in proceedings of the conference Open
Systems and Measurement in Relativistic Quantum Theory, Naples, April 3-4,
1998, edited by H.P.Breuer and F.Petruccione | null | 10.1007/BFb0104402 | Imperial/TP/97-98/70 | gr-qc | null | We address the issue of coupling variables which are essentially classical to
variables that are quantum. Two approaches are discussed. In the first (based
on collaborative work with L.Di\'osi), continuous quantum measurement theory is
used to construct a phenomenological description of the interaction of a
quasiclas... | [
{
"created": "Wed, 26 Aug 1998 14:01:04 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Halliwell",
"J. J.",
""
]
] | We address the issue of coupling variables which are essentially classical to variables that are quantum. Two approaches are discussed. In the first (based on collaborative work with L.Di\'osi), continuous quantum measurement theory is used to construct a phenomenological description of the interaction of a quasiclassi... |
gr-qc/0208092 | Gregory J. Galloway | Gregory J. Galloway | Some global results for asymptotically simple spacetimes | Contribution to the Proceedings of the Workshop "The conformal
structure of space-times: geometry, analysis, numerics", Tuebingen April
2001. To appear in Lecture Notes in Physics, Springer Verlag, edited by J.
Frauendiener and H. Friedrich | Lect.Notes Phys. 604 (2002) 51-60 | null | null | gr-qc math.DG | null | The null splitting theorem (proved in math.DG/9909158) is discussed. As an
application, a uniqueness theorem for Minkowski space and for de Sitter space
associated with the occurrence of null lines (inextendible globally achronal
null geodesics) is presented.
| [
{
"created": "Fri, 30 Aug 2002 15:40:04 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Galloway",
"Gregory J.",
""
]
] | The null splitting theorem (proved in math.DG/9909158) is discussed. As an application, a uniqueness theorem for Minkowski space and for de Sitter space associated with the occurrence of null lines (inextendible globally achronal null geodesics) is presented. |
0903.0324 | Luigi Ferraioli | Luigi Ferraioli, Mauro Hueller and Stefano Vitale | Discrete derivative estimation in LISA Pathfinder data reduction | to be published in Class. Quantum Grav. 7th LISA Symposium special
issue | Class.Quant.Grav.26:094013,2009 | 10.1088/0264-9381/26/9/094013 | null | gr-qc physics.data-an | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Data analysis for the LISA Technology package (LTP) experiment to be flown
aboard the LISA Pathfinder mission requires the solution of the system dynamics
for the calculation of the force acting on the test masses (TMs) starting from
interferometer position data. The need for a solution to this problem has
prompted u... | [
{
"created": "Mon, 2 Mar 2009 16:24:51 GMT",
"version": "v1"
}
] | 2014-11-18 | [
[
"Ferraioli",
"Luigi",
""
],
[
"Hueller",
"Mauro",
""
],
[
"Vitale",
"Stefano",
""
]
] | Data analysis for the LISA Technology package (LTP) experiment to be flown aboard the LISA Pathfinder mission requires the solution of the system dynamics for the calculation of the force acting on the test masses (TMs) starting from interferometer position data. The need for a solution to this problem has prompted us ... |
gr-qc/0512041 | Piotr T. Chru\'sciel | Piotr T. Chrusciel, Harvey S. Reall, Paul Tod | On non-existence of static vacuum black holes with degenerate components
of the event horizon | latex2e, 9 pages in A4 | Class.Quant.Grav. 23 (2006) 549-554 | 10.1088/0264-9381/23/2/018 | Newton Institute preprint NI05066-GMR | gr-qc | null | We present a simple proof of the non-existence of degenerate components of
the event horizon in static, vacuum, regular, four-dimensional black hole
spacetimes. We discuss the generalisation to higher dimensions and the
inclusion of a cosmological constant.
| [
{
"created": "Tue, 6 Dec 2005 19:49:49 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Chrusciel",
"Piotr T.",
""
],
[
"Reall",
"Harvey S.",
""
],
[
"Tod",
"Paul",
""
]
] | We present a simple proof of the non-existence of degenerate components of the event horizon in static, vacuum, regular, four-dimensional black hole spacetimes. We discuss the generalisation to higher dimensions and the inclusion of a cosmological constant. |
gr-qc/9406008 | null | Svend E. Rugh | Chaos in the Einstein Equations - Characterization and Importance? | 68 pages, 9 figures, LaTeX | null | null | Niels Bohr Institute preprint NBI-HE-94-07 (1994) | gr-qc chao-dyn hep-th nlin.CD | null | Is it possible to define what we could mean by chaos in a space-time metric
(even in the simplest toy-model studies)? Is it of importance for phenomena we
may search for in Nature?
| [
{
"created": "Sat, 4 Jun 1994 11:43:23 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Rugh",
"Svend E.",
""
]
] | Is it possible to define what we could mean by chaos in a space-time metric (even in the simplest toy-model studies)? Is it of importance for phenomena we may search for in Nature? |
1307.4598 | Fl\'avio Coelho | Fl\'avio S. Coelho, Carlos Herdeiro, Shinji Hirano and Yuki Sato | PPN expansion and FRW scalar perturbations in n-DBI gravity | 19 pages; v3, matches published version | Phys. Rev. D 90, 064040 (2014) | 10.1103/PhysRevD.90.064040 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | n-DBI gravity explicitly breaks Lorentz invariance by the introduction of a
unit time-like vector field, thereby giving rise to an extra (scalar) degree of
freedom. We look for observational consequences of this mode in two setups.
Firstly, we compute the parametrized post-Newtonian (PPN) expansion of the
metric to f... | [
{
"created": "Wed, 17 Jul 2013 12:37:22 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jan 2014 14:31:41 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Sep 2014 14:30:35 GMT",
"version": "v3"
}
] | 2014-09-30 | [
[
"Coelho",
"Flávio S.",
""
],
[
"Herdeiro",
"Carlos",
""
],
[
"Hirano",
"Shinji",
""
],
[
"Sato",
"Yuki",
""
]
] | n-DBI gravity explicitly breaks Lorentz invariance by the introduction of a unit time-like vector field, thereby giving rise to an extra (scalar) degree of freedom. We look for observational consequences of this mode in two setups. Firstly, we compute the parametrized post-Newtonian (PPN) expansion of the metric to fir... |
gr-qc/9911094 | Omgavr | A.M.Gavrilik (BITP, Kiev) | The Use of Quantum Algebras in Quantum Gravity | 6 pages, LaTeX. Contribution to proceedings of III Int. Conference
"Symmetry in Nonlinear Mathematical Physics" (Kiev, 12-18 July, 1999) | EconfC990712:304-309,1999 | null | null | gr-qc hep-th math-ph math.MP math.QA | null | After a brief survey of the appearance of quantum algebras in diverse
contexts of quantum gravity, we demonstrate that the particular deformed
algebras, which arise within the approach of J.Nelson and T.Regge to 2+1
anti-de Sitter quantum gravity (for space surface of genus g) and which are
basic for generating the a... | [
{
"created": "Wed, 24 Nov 1999 21:00:48 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Gavrilik",
"A. M.",
"",
"BITP, Kiev"
]
] | After a brief survey of the appearance of quantum algebras in diverse contexts of quantum gravity, we demonstrate that the particular deformed algebras, which arise within the approach of J.Nelson and T.Regge to 2+1 anti-de Sitter quantum gravity (for space surface of genus g) and which are basic for generating the alg... |
1004.0922 | Mariafelicia De Laurentis | Mariafelicia De Laurentis | Newtonian and relativistic theory of orbits and emission of
gravitational waves | 44 pages, 22 figures. arXiv admin note: substantial text overlap with
arXiv:gr-qc/0501041 by other authors without attribution | null | 10.2174/18743811010040100108 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This review paper is devoted to the theory of orbits. We start with the
discussion of the Newtonian problem of motion then we consider the relativistic
problem of motion, in particular the PN approximation and the further
gravitomagnetic corrections. Finally by a classification of orbits in
accordance with the condit... | [
{
"created": "Tue, 6 Apr 2010 18:29:37 GMT",
"version": "v1"
}
] | 2017-09-06 | [
[
"De Laurentis",
"Mariafelicia",
""
]
] | This review paper is devoted to the theory of orbits. We start with the discussion of the Newtonian problem of motion then we consider the relativistic problem of motion, in particular the PN approximation and the further gravitomagnetic corrections. Finally by a classification of orbits in accordance with the conditio... |
2007.11990 | Genly Le\'on | Genly Leon (Catolica del Norte U.), Felipe Orlando Franz Silva
(Catolica del Norte U.) | Generalized Scalar Field Cosmologies: A Global Dynamical Systems
Formulation | This manuscript supersedes arXiv:1912.09856v4 [gr-qc]. 50 pages, 8
compound figures | null | 10.1088/1361-6382/abc095 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Local and global phase-space descriptions and averaging methods are used to
find qualitative features of solutions for the FLRW and the Bianchi I metrics
in the context of scalar field cosmologies with arbitrary potentials and
arbitrary couplings to matter. The stability of the equilibrium points in a
phase-space as ... | [
{
"created": "Wed, 22 Jul 2020 00:22:00 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Sep 2020 01:47:46 GMT",
"version": "v2"
}
] | 2021-02-03 | [
[
"Leon",
"Genly",
"",
"Catolica del Norte U."
],
[
"Silva",
"Felipe Orlando Franz",
"",
"Catolica del Norte U."
]
] | Local and global phase-space descriptions and averaging methods are used to find qualitative features of solutions for the FLRW and the Bianchi I metrics in the context of scalar field cosmologies with arbitrary potentials and arbitrary couplings to matter. The stability of the equilibrium points in a phase-space as we... |
gr-qc/0602080 | Stephen Castles | S. H. Castles | Hamilton's equations of motion from the SU(1,1)/U(1) symmetry of
Schwarzschild radial dynamics | 12 pages, 2 figures, revised to improve clarity, add details and add
references | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Particles moving on a radial ray with respect to a Schwarzschild mass are
shown to have SU(1,1)/U(1) dynamical symmetry. This symmetry is used to
identify a global time variable shared by all test particles moving on a radial
ray. With this time variable, Hamilton's equations for particles on a radial
ray have the fo... | [
{
"created": "Tue, 21 Feb 2006 15:55:55 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Feb 2011 04:01:55 GMT",
"version": "v2"
}
] | 2011-02-15 | [
[
"Castles",
"S. H.",
""
]
] | Particles moving on a radial ray with respect to a Schwarzschild mass are shown to have SU(1,1)/U(1) dynamical symmetry. This symmetry is used to identify a global time variable shared by all test particles moving on a radial ray. With this time variable, Hamilton's equations for particles on a radial ray have the form... |
1011.3973 | J. W. van Holten | G. Koekoek and J.W. van Holten | Epicycles and Poincar\'{e} Resonances in General Relativity | 24 pages, 4 figures | Phys.Rev.D83:064041,2011 | 10.1103/PhysRevD.83.064041 | NIKHEF/2010-042 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The method of geodesic deviations provides analytic approximations to
geodesics in arbitrary background space-times. As such the method is a useful
tool in many practical situations. In this note we point out some subtleties in
the application of the method related to secular motions, in first as well as
in higher or... | [
{
"created": "Wed, 17 Nov 2010 15:10:25 GMT",
"version": "v1"
}
] | 2011-05-10 | [
[
"Koekoek",
"G.",
""
],
[
"van Holten",
"J. W.",
""
]
] | The method of geodesic deviations provides analytic approximations to geodesics in arbitrary background space-times. As such the method is a useful tool in many practical situations. In this note we point out some subtleties in the application of the method related to secular motions, in first as well as in higher orde... |
1308.1142 | Takeshi Chiba | Takeshi Chiba, Masahide Yamaguchi | Conformal-Frame (In)dependence of Cosmological Observations in
Scalar-Tensor Theory | 18 pages, v2: minor changes. published version | JCAP 1310:040,2013 | 10.1088/1475-7516/2013/10/040 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide the correspondence between the variables in the Jordan frame and
those in the Einstein frame in scalar-tensor gravity and consider the
frame-(in)dependence of the cosmological observables. In particular, we show
that the cosmological observables/relations (redshift, luminosity distance,
temperature anisotr... | [
{
"created": "Mon, 5 Aug 2013 23:31:02 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Oct 2013 03:30:21 GMT",
"version": "v2"
}
] | 2015-06-16 | [
[
"Chiba",
"Takeshi",
""
],
[
"Yamaguchi",
"Masahide",
""
]
] | We provide the correspondence between the variables in the Jordan frame and those in the Einstein frame in scalar-tensor gravity and consider the frame-(in)dependence of the cosmological observables. In particular, we show that the cosmological observables/relations (redshift, luminosity distance, temperature anisotrop... |
1705.00435 | Vee-Liem Saw | Vee-Liem Saw and Freeman Chee Siong Thun | Peeling property and asymptotic symmetries with a cosmological constant | 28 pages, two recent relevant references are included. Accepted for
publication by International Journal of Modern Physics D | International Journal of Modern Physics D, Vol. 29, No. 3 (2020)
2050020 | 10.1142/S0218271820500200 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper establishes two things in an asymptotically (anti-)de Sitter
spacetime, by direct computations in the physical spacetime (i.e. with no
involvement of spacetime compactification): (1) The peeling property of the
Weyl spinor is guaranteed. In the case where there are Maxwell fields present,
the peeling prope... | [
{
"created": "Mon, 1 May 2017 07:36:52 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Jan 2019 16:39:12 GMT",
"version": "v2"
},
{
"created": "Fri, 20 Dec 2019 16:25:05 GMT",
"version": "v3"
}
] | 2020-04-30 | [
[
"Saw",
"Vee-Liem",
""
],
[
"Thun",
"Freeman Chee Siong",
""
]
] | This paper establishes two things in an asymptotically (anti-)de Sitter spacetime, by direct computations in the physical spacetime (i.e. with no involvement of spacetime compactification): (1) The peeling property of the Weyl spinor is guaranteed. In the case where there are Maxwell fields present, the peeling propert... |
1408.2241 | Tim Taves Dr. | Tim Taves | Black Hole Formation in Lovelock Gravity | PhD thesis, defended August, 2013, 124 pages, 45 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We first derive the Hamiltonian for Lovelock gravity and find that it takes
the same form as in general relativity when written in terms of the
Misner-Sharp mass function. We then minimally couple the action to matter
fields to find Hamilton's equations of motion. These are gauge fixed to be in
the Painlev\'e-Gullstr... | [
{
"created": "Sun, 10 Aug 2014 15:42:07 GMT",
"version": "v1"
}
] | 2014-08-13 | [
[
"Taves",
"Tim",
""
]
] | We first derive the Hamiltonian for Lovelock gravity and find that it takes the same form as in general relativity when written in terms of the Misner-Sharp mass function. We then minimally couple the action to matter fields to find Hamilton's equations of motion. These are gauge fixed to be in the Painlev\'e-Gullstran... |
gr-qc/9506092 | null | Giampiero Esposito and Alexander Yu. Kamenshchik | Mixed Boundary Conditions in Euclidean Quantum Gravity | 17 pages, plain-tex | Class.Quant.Grav. 12 (1995) 2715-2722 | 10.1088/0264-9381/12/11/004 | DSF 95/23 | gr-qc | null | This paper studies a new set of mixed boundary conditions in Euclidean
quantum gravity. These involve, in particular, Robin boundary conditions on the
perturbed 3-metric and hence lead, by gauge invariance, to Robin conditions on
the whole ghost 1-form. The corresponding trace anomaly is evaluated in the
case of flat... | [
{
"created": "Sun, 2 Jul 1995 13:24:51 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Esposito",
"Giampiero",
""
],
[
"Kamenshchik",
"Alexander Yu.",
""
]
] | This paper studies a new set of mixed boundary conditions in Euclidean quantum gravity. These involve, in particular, Robin boundary conditions on the perturbed 3-metric and hence lead, by gauge invariance, to Robin conditions on the whole ghost 1-form. The corresponding trace anomaly is evaluated in the case of flat E... |
1706.10150 | Joseph P Johnson | Joseph P Johnson, Jose Mathew, and S. Shankaranarayanan | Exact inflationary solutions in exponential gravity | 17 pages, 4 figures, 2 tables | null | 10.1007/s10714-019-2531-4 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a modified gravity model of the form $ f(R,\phi)=R e^{h(\phi)R}
$, where the strong gravity corrections are taken to all orders and $\phi$ is a
self-interacting massless scalar field. We show that the conformal
transformation of this model to Einstein frame leads to non-canonical kinetic
term and negates ... | [
{
"created": "Thu, 29 Jun 2017 13:13:25 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Mar 2019 07:46:36 GMT",
"version": "v2"
}
] | 2019-03-18 | [
[
"Johnson",
"Joseph P",
""
],
[
"Mathew",
"Jose",
""
],
[
"Shankaranarayanan",
"S.",
""
]
] | We consider a modified gravity model of the form $ f(R,\phi)=R e^{h(\phi)R} $, where the strong gravity corrections are taken to all orders and $\phi$ is a self-interacting massless scalar field. We show that the conformal transformation of this model to Einstein frame leads to non-canonical kinetic term and negates th... |
1502.02274 | Izzet Sakalli | I. Sakalli and G. Tokgoz | Resonance Spectra of Caged Stringy Black Hole and Its Spectroscopy | New References have been added. Thanks to Prof. Carlos A. R. Herdeiro | Advances in High Energy Physics, Volume 2015, Article ID 739153 | 10.1155/2015/739153 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Maggiore's method (MM), which evaluates the transition frequency that
appears in the adiabatic invariant from the highly damped quasinormal mode
(QNM) frequencies, is used to investigate the entropy/area spectra of the
Garfinkle--Horowitz--Strominger black hole (GHSBH). Instead of the ordinary
QNMs, we compute th... | [
{
"created": "Sun, 8 Feb 2015 17:12:59 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Feb 2015 19:01:30 GMT",
"version": "v2"
}
] | 2015-02-12 | [
[
"Sakalli",
"I.",
""
],
[
"Tokgoz",
"G.",
""
]
] | The Maggiore's method (MM), which evaluates the transition frequency that appears in the adiabatic invariant from the highly damped quasinormal mode (QNM) frequencies, is used to investigate the entropy/area spectra of the Garfinkle--Horowitz--Strominger black hole (GHSBH). Instead of the ordinary QNMs, we compute the ... |
gr-qc/9606052 | Raphael Bousso | Raphael Bousso and Stephen W. Hawking (DAMTP, Cambridge) | Pair Creation of Black Holes During Inflation | 29 pages, LaTeX, 3 figures, submitted to Phys. Rev. D; minor typos
corrected, missing minus sign in Eq. (3.11) inserted | Phys.Rev.D54:6312-6322,1996 | 10.1103/PhysRevD.54.6312 | DAMTP/R-96/33 | gr-qc astro-ph hep-th | null | Black holes came into existence together with the universe through the
quantum process of pair creation in the inflationary era. We present the
instantons responsible for this process and calculate the pair creation rate
from the no boundary proposal for the wave function of the universe. We find
that this proposal l... | [
{
"created": "Tue, 18 Jun 1996 02:00:37 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jun 1996 12:29:20 GMT",
"version": "v2"
}
] | 2009-07-09 | [
[
"Bousso",
"Raphael",
"",
"DAMTP, Cambridge"
],
[
"Hawking",
"Stephen W.",
"",
"DAMTP, Cambridge"
]
] | Black holes came into existence together with the universe through the quantum process of pair creation in the inflationary era. We present the instantons responsible for this process and calculate the pair creation rate from the no boundary proposal for the wave function of the universe. We find that this proposal lea... |
2306.04211 | Emine \c{S}eyma Kutluk | Emine \c{S}eyma Kutluk | Cosmological perturbations out of the box I | v2:Minor changes | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Using the tool of Hodge-Morrey decomposition of forms, we prove a new
decomposition of symmetric rank-2 tensors on Ricci flat manifolds with
boundary. Using this we reconstruct a new cosmological perturbation theory that
allows for the scalar-vector-tensor type separation of the linearized Einstein
equations with gen... | [
{
"created": "Wed, 7 Jun 2023 07:36:52 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Jun 2023 06:57:21 GMT",
"version": "v2"
}
] | 2023-06-16 | [
[
"Kutluk",
"Emine Şeyma",
""
]
] | Using the tool of Hodge-Morrey decomposition of forms, we prove a new decomposition of symmetric rank-2 tensors on Ricci flat manifolds with boundary. Using this we reconstruct a new cosmological perturbation theory that allows for the scalar-vector-tensor type separation of the linearized Einstein equations with gener... |
1009.5111 | Nikolaos Pappas | Nikolaos D. Pappas | A new approach to information loss (no) problem for Black Holes | 6 pages, no figures | Int. J. Theor. Math. Phys. v2 (2012) n2, 5-9 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The discovery that black holes emit thermal type radiation changed radically
our perception of their behavior. Until then, their interior was considered as
causally disconnected from the rest of the universe, so any kind of
information, that went down the black hole, was believed to remain eternally
trapped in it. Th... | [
{
"created": "Sun, 26 Sep 2010 17:50:22 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Oct 2010 18:21:39 GMT",
"version": "v2"
},
{
"created": "Mon, 2 Jan 2012 14:33:48 GMT",
"version": "v3"
}
] | 2012-04-24 | [
[
"Pappas",
"Nikolaos D.",
""
]
] | The discovery that black holes emit thermal type radiation changed radically our perception of their behavior. Until then, their interior was considered as causally disconnected from the rest of the universe, so any kind of information, that went down the black hole, was believed to remain eternally trapped in it. The ... |
2303.14138 | Pardyumn Kumar Sahoo | M. Koussour, Simran Arora, Dhruba Jyoti Gogoi, M. Bennai, P.K. Sahoo | Constant sound speed and its thermodynamical interpretation in $f(Q)$
gravity | Nuclear Physics B published version | Nuclear Physics B, 990 (2023) 116158 | 10.1016/j.nuclphysb.2023.116158 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | On the basis of homogeneous and isotropic Friedmann-Lemaitre-Robertson-Walker
(FLRW) geometry, solutions to the issues of cosmic acceleration and dark energy
are being put forth within the context of $f\left( Q\right)$ gravity. We take
into account a power law $f(Q)$ model using $f\left( Q\right) =\alpha Q^{n}$,
wher... | [
{
"created": "Thu, 23 Mar 2023 11:08:09 GMT",
"version": "v1"
}
] | 2023-03-28 | [
[
"Koussour",
"M.",
""
],
[
"Arora",
"Simran",
""
],
[
"Gogoi",
"Dhruba Jyoti",
""
],
[
"Bennai",
"M.",
""
],
[
"Sahoo",
"P. K.",
""
]
] | On the basis of homogeneous and isotropic Friedmann-Lemaitre-Robertson-Walker (FLRW) geometry, solutions to the issues of cosmic acceleration and dark energy are being put forth within the context of $f\left( Q\right)$ gravity. We take into account a power law $f(Q)$ model using $f\left( Q\right) =\alpha Q^{n}$, where ... |
2007.07109 | Paulo M. S\'a | Paulo M. S\'a | Triple unification of inflation, dark energy, and dark matter in
two-scalar-field cosmology | 14 pages, 13 figures | Phys. Rev. D 102, 103519 (2020) | 10.1103/PhysRevD.102.103519 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A unified description of inflation, dark energy, and dark matter is presented
within a two-scalar-field cosmological model. Inflation, assumed to be of the
warm type, is driven by one of the scalar fields, which, shortly after the end
of the inflationary period, decouples from radiation and begins to oscillate
rapidl... | [
{
"created": "Tue, 14 Jul 2020 15:28:30 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Aug 2020 11:26:00 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Nov 2020 11:42:29 GMT",
"version": "v3"
}
] | 2020-11-24 | [
[
"Sá",
"Paulo M.",
""
]
] | A unified description of inflation, dark energy, and dark matter is presented within a two-scalar-field cosmological model. Inflation, assumed to be of the warm type, is driven by one of the scalar fields, which, shortly after the end of the inflationary period, decouples from radiation and begins to oscillate rapidly ... |
1607.03565 | Jiliang Jing | Zixu Zhao and Jiliang Jing | Generalized thermodynamic identity and new Maxwell's law for charged AdS
black hole | 9+1 pages, 1 figure | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the thermodynamic properties of the RN-AdS black hole in full phase
space and propose a generalized thermodynamic identity. As an example, we use
it to find relations of thermodynamical coefficients between the grand
canonical and canonical ensembles. We also show, for the first order phase
transition, that ... | [
{
"created": "Wed, 13 Jul 2016 01:58:50 GMT",
"version": "v1"
}
] | 2016-07-14 | [
[
"Zhao",
"Zixu",
""
],
[
"Jing",
"Jiliang",
""
]
] | We study the thermodynamic properties of the RN-AdS black hole in full phase space and propose a generalized thermodynamic identity. As an example, we use it to find relations of thermodynamical coefficients between the grand canonical and canonical ensembles. We also show, for the first order phase transition, that th... |
2011.01296 | Pablo Guilleminot M. Sc. | Pablo Guilleminot, F\'elix-Louis Juli\'e, Nelson Merino and Rodrigo
Olea | First-order Lagrangian and Hamiltonian of Lovelock gravity | null | null | 10.1088/1361-6382/abf415 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the insight gained by many authors over the years on the structure
of the Einstein-Hilbert, Gauss-Bonnet and Lovelock gravity Lagrangians, we show
how to derive -- in an elementary fashion -- their first-order, generalized
"ADM" Lagrangian and associated Hamiltonian. To do so, we start from the
Lovelock Lagr... | [
{
"created": "Mon, 2 Nov 2020 20:28:20 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Apr 2021 23:26:19 GMT",
"version": "v2"
}
] | 2021-06-09 | [
[
"Guilleminot",
"Pablo",
""
],
[
"Julié",
"Félix-Louis",
""
],
[
"Merino",
"Nelson",
""
],
[
"Olea",
"Rodrigo",
""
]
] | Based on the insight gained by many authors over the years on the structure of the Einstein-Hilbert, Gauss-Bonnet and Lovelock gravity Lagrangians, we show how to derive -- in an elementary fashion -- their first-order, generalized "ADM" Lagrangian and associated Hamiltonian. To do so, we start from the Lovelock Lagran... |
2307.02214 | Boris Latosh | A. Arbuzov, D. Kuznetsov, B. Latosh, V. Shmidt | Inflation in simple one-loop effective potentials of perturbative
quantum gravity | 19 pages, 30 figures. International Journal of Modern Physics, 2024 | International Journal of Modern Physics D, Volume No. 33, Issue
No. 07n08, Article No. 2450028, Year 2024 | 10.1142/S0218271824500287 | CTPU-PTC-23-30 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study inflation in scalar-tensor perturbative quantum gravity driven by a
one-loop effective potential. We consider effective potentials generated by
three models. The first model describes a single scalar field with a
non-vanishing mass. The second model describes a massless scalar field with
non-minimal coupling... | [
{
"created": "Wed, 5 Jul 2023 11:42:29 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Jul 2023 00:55:33 GMT",
"version": "v2"
},
{
"created": "Mon, 22 Apr 2024 11:10:48 GMT",
"version": "v3"
}
] | 2024-07-18 | [
[
"Arbuzov",
"A.",
""
],
[
"Kuznetsov",
"D.",
""
],
[
"Latosh",
"B.",
""
],
[
"Shmidt",
"V.",
""
]
] | We study inflation in scalar-tensor perturbative quantum gravity driven by a one-loop effective potential. We consider effective potentials generated by three models. The first model describes a single scalar field with a non-vanishing mass. The second model describes a massless scalar field with non-minimal coupling t... |
2403.14834 | Adrien Bourgoin | Adrien Bourgoin (1), Pierre Teyssandier (1), Paolo Tortora (2), Marco
Zannoni (2) ((1) SYRTE, Observatoire de Paris, PSL Research University, CNRS,
Sorbonne Universit\'e, UPMC, Univ. Paris 06, Paris, France, (2) Dipartimento
di Ingegneria Industriale, Alma Mater Studiorum - Universit\`a di Bologna,
Forl\`i, Ita... | Time and frequency transfers in optical spacetime | 11 pages, 5 figures, proceeding des Journ\'ees syst\`emes de
r\'ef\'erences spatio-temporels 2023 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Solving the null geodesic equations for a ray of light is a difficult task
even considering a stationary spacetime. The problem becomes even more
difficult if the electromagnetic signal propagates through a flowing optical
medium. Indeed, because of the interaction between light and matter, the signal
does not follow... | [
{
"created": "Thu, 21 Mar 2024 21:08:22 GMT",
"version": "v1"
}
] | 2024-03-25 | [
[
"Bourgoin",
"Adrien",
""
],
[
"Teyssandier",
"Pierre",
""
],
[
"Tortora",
"Paolo",
""
],
[
"Zannoni",
"Marco",
""
]
] | Solving the null geodesic equations for a ray of light is a difficult task even considering a stationary spacetime. The problem becomes even more difficult if the electromagnetic signal propagates through a flowing optical medium. Indeed, because of the interaction between light and matter, the signal does not follow a... |
1005.4655 | Ruslan Vaulin | the LIGO Scientific Collaboration, the Virgo Collaboration | Search for Gravitational Waves from Compact Binary Coalescence in LIGO
and Virgo Data from S5 and VSR1 | null | Phys.Rev.D82:102001,2010 | 10.1103/PhysRevD.82.102001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report the results of the first search for gravitational waves from
compact binary coalescence using data from the LIGO and Virgo detectors. Five
months of data were collected during the concurrent S5 (LIGO) and VSR1 (Virgo)
science runs. The search focused on signals from binary mergers with a total
mass between ... | [
{
"created": "Tue, 25 May 2010 18:44:22 GMT",
"version": "v1"
}
] | 2012-08-27 | [
[
"the LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
]
] | We report the results of the first search for gravitational waves from compact binary coalescence using data from the LIGO and Virgo detectors. Five months of data were collected during the concurrent S5 (LIGO) and VSR1 (Virgo) science runs. The search focused on signals from binary mergers with a total mass between 2 ... |
1010.3767 | Jorma Louko | Gabor Kunstatter (U. of Winnipeg), Jorma Louko (U. of Nottingham) and
Ari Peltola (U. of Winnipeg) | Quantum dynamics of the Einstein-Rosen wormhole throat | 23 pages, 11 figures. v2: minor corrections and clarifications | Phys.Rev.D83:044022,2011 | 10.1103/PhysRevD.83.044022 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the polymer quantization of the Einstein wormhole throat theory
for an eternal Schwarzschild black hole. We numerically solve the difference
equation describing the quantum evolution of an initially Gaussian,
semi-classical wave packet. As expected from previous work on loop quantum
cosmology, the wave pa... | [
{
"created": "Tue, 19 Oct 2010 01:02:46 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Feb 2011 15:00:38 GMT",
"version": "v2"
}
] | 2011-03-01 | [
[
"Kunstatter",
"Gabor",
"",
"U. of Winnipeg"
],
[
"Louko",
"Jorma",
"",
"U. of Nottingham"
],
[
"Peltola",
"Ari",
"",
"U. of Winnipeg"
]
] | We consider the polymer quantization of the Einstein wormhole throat theory for an eternal Schwarzschild black hole. We numerically solve the difference equation describing the quantum evolution of an initially Gaussian, semi-classical wave packet. As expected from previous work on loop quantum cosmology, the wave pack... |
2306.17774 | Martin Taylor | Martin Taylor | Future stability of expanding spatially homogeneous FLRW solutions of
the spherically symmetric Einstein--massless Vlasov system with spatial
topology $\mathbb{R}^3$ | 22 pages, 1 figure | null | null | null | gr-qc math-ph math.AP math.DG math.MP | http://creativecommons.org/licenses/by/4.0/ | Spatially homogeneous FLRW solutions constitute an infinite dimensional
family of explicit solutions of the Einstein--massless Vlasov system with
vanishing cosmological constant. Each member expands towards the future at a
decelerated rate. These solutions are shown to be nonlinearly future stable to
compactly suppor... | [
{
"created": "Fri, 30 Jun 2023 16:25:55 GMT",
"version": "v1"
}
] | 2023-07-03 | [
[
"Taylor",
"Martin",
""
]
] | Spatially homogeneous FLRW solutions constitute an infinite dimensional family of explicit solutions of the Einstein--massless Vlasov system with vanishing cosmological constant. Each member expands towards the future at a decelerated rate. These solutions are shown to be nonlinearly future stable to compactly supporte... |
2007.00190 | James Bardeen | James M. Bardeen | Black holes to white holes II: quasi-classical scenarios for white hole
evolution | 23 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper considers a wider range of "quasi-classical" models for the
non-singular transition from an evaporating black hole to a white hole and the
evolution of the white hole than were considered in Paper I. The quantum
evolution of the geometry outside a collapsing shell is described by a smoothly
evolving spheri... | [
{
"created": "Wed, 1 Jul 2020 02:35:53 GMT",
"version": "v1"
}
] | 2020-07-02 | [
[
"Bardeen",
"James M.",
""
]
] | This paper considers a wider range of "quasi-classical" models for the non-singular transition from an evaporating black hole to a white hole and the evolution of the white hole than were considered in Paper I. The quantum evolution of the geometry outside a collapsing shell is described by a smoothly evolving spherica... |
gr-qc/0004069 | Martin Goliath | Martin Goliath and Ulf S. Nilsson | Isotropization of two-component fluids | 9 pages, 6 figures | J.Math.Phys. 41 (2000) 6906-6917 | 10.1063/1.1289829 | null | gr-qc | null | We consider the problem of late-time isotropization in spatially homogeneous
but anisotropic cosmological models when the source of the gravitational field
consists of two non-interacting perfect fluids -- one tilted and one
non-tilted. In particular, we study irrotational Bianchi type V models. By
introducing approp... | [
{
"created": "Thu, 20 Apr 2000 15:13:47 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Jun 2000 14:22:44 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Goliath",
"Martin",
""
],
[
"Nilsson",
"Ulf S.",
""
]
] | We consider the problem of late-time isotropization in spatially homogeneous but anisotropic cosmological models when the source of the gravitational field consists of two non-interacting perfect fluids -- one tilted and one non-tilted. In particular, we study irrotational Bianchi type V models. By introducing appropri... |
gr-qc/0103032 | Hisaaki Shinkai | Gen Yoneda and Hisa-aki Shinkai | Constraint propagation in the family of ADM systems | 11 pages, RevTeX, 2 eps figures | Phys.Rev. D63 (2001) 124019 | 10.1103/PhysRevD.63.124019 | CGPG-01/3-2 | gr-qc | null | The current important issue in numerical relativity is to determine which
formulation of the Einstein equations provides us with stable and accurate
simulations. Based on our previous work on "asymptotically constrained"
systems, we here present constraint propagation equations and their eigenvalues
for the Arnowitt-... | [
{
"created": "Fri, 9 Mar 2001 16:45:08 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Mar 2001 18:41:37 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Yoneda",
"Gen",
""
],
[
"Shinkai",
"Hisa-aki",
""
]
] | The current important issue in numerical relativity is to determine which formulation of the Einstein equations provides us with stable and accurate simulations. Based on our previous work on "asymptotically constrained" systems, we here present constraint propagation equations and their eigenvalues for the Arnowitt-De... |
gr-qc/9707005 | null | Francois Goy (University of Bari) | About Synchronisation of Clocks in Free Fall Around a Central Body | Latex, 10 pages, No figure, Talk of the Athen's Conference on
Relativistic Physics, 25-28 june 1997 | null | null | null | gr-qc | null | The conventional nature of synchronisation is discussed in inertial frames,
where it is found that theories using different synchronisations are
experimentally equivalent to special relativity. In contrary, in accelerated
systems only a theory maintaining an absolute simultaneity is consistent with
the natural behavi... | [
{
"created": "Wed, 2 Jul 1997 14:49:35 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Goy",
"Francois",
"",
"University of Bari"
]
] | The conventional nature of synchronisation is discussed in inertial frames, where it is found that theories using different synchronisations are experimentally equivalent to special relativity. In contrary, in accelerated systems only a theory maintaining an absolute simultaneity is consistent with the natural behaviou... |
0706.0469 | David P. Rideout | Johannes Brunnemann and David Rideout | Properties of the Volume Operator in Loop Quantum Gravity I: Results | 36 pages, 7 figures, LaTeX. See also companion paper
arXiv:0706.0382v1. Version as published in CQG in 2008. See arXiv:1003.2348
for important remarks regarding the sigma configurations. Subsequent
computations have revealed some minor errors, which do not change the
qualitative results but modify some of the n... | Class.Quant.Grav.25:065001,2008 | 10.1088/0264-9381/25/6/065001 | Imperial/TP/2007/DR/01 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the spectral properties of the volume operator of Ashtekar and
Lewandowski in Loop Quantum Gravity, which is the quantum analogue of the
classical volume expression for regions in three dimensional Riemannian space.
Our analysis considers for the first time generic graph vertices of valence
greater than fo... | [
{
"created": "Mon, 4 Jun 2007 18:32:12 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Nov 2010 16:56:05 GMT",
"version": "v2"
}
] | 2010-11-22 | [
[
"Brunnemann",
"Johannes",
""
],
[
"Rideout",
"David",
""
]
] | We analyze the spectral properties of the volume operator of Ashtekar and Lewandowski in Loop Quantum Gravity, which is the quantum analogue of the classical volume expression for regions in three dimensional Riemannian space. Our analysis considers for the first time generic graph vertices of valence greater than four... |
2107.12166 | Husin Alatas | Husin Alatas, Siti A. Nuraeni, Ilma L. Saptiani, Bobby E. Gunara | On the Photon Motion Near a Five-Dimensional Schwarzschild Black Hole | null | Eur. J. Phys. 2021 | 10.1088/1361-6404/ac172e | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this report, we discuss the dynamics of photons in a five-dimensional
Schwarzschild black hole. We find that the corresponding
Eddington-Finkelstein-like coordinate admits two time-coordinate singularities
for a particular condition. This condition is due to the existence of a
non-zero angular momentum related to ... | [
{
"created": "Mon, 26 Jul 2021 12:33:08 GMT",
"version": "v1"
}
] | 2021-07-27 | [
[
"Alatas",
"Husin",
""
],
[
"Nuraeni",
"Siti A.",
""
],
[
"Saptiani",
"Ilma L.",
""
],
[
"Gunara",
"Bobby E.",
""
]
] | In this report, we discuss the dynamics of photons in a five-dimensional Schwarzschild black hole. We find that the corresponding Eddington-Finkelstein-like coordinate admits two time-coordinate singularities for a particular condition. This condition is due to the existence of a non-zero angular momentum related to th... |
gr-qc/9805031 | Yuri Levin | Vladimir B. Braginsky, Yuri Levin, Sergey Vyatchanin | How to reduce the suspension thermal noise in LIGO without improving the
Q's of the pendulum and violin modes | a few misprints corrected; submitted to Classical and Quantum Gravity | Measur.Sci.Tech.10:598-606,1999 | 10.1088/0957-0233/10/7/305 | null | gr-qc | null | The suspension noise in interferometric gravitational wave detectors is
caused by losses at the top and the bottom attachments of each suspension
fiber. We use the Fluctuation-Dissipation theorem to argue that by careful
positioning of the laser beam spot on the mirror face it is possible to reduce
the contribution o... | [
{
"created": "Sat, 9 May 1998 22:51:16 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Nov 1998 09:37:14 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Braginsky",
"Vladimir B.",
""
],
[
"Levin",
"Yuri",
""
],
[
"Vyatchanin",
"Sergey",
""
]
] | The suspension noise in interferometric gravitational wave detectors is caused by losses at the top and the bottom attachments of each suspension fiber. We use the Fluctuation-Dissipation theorem to argue that by careful positioning of the laser beam spot on the mirror face it is possible to reduce the contribution of ... |
gr-qc/9703078 | J. D. E. Grant | James D. E. Grant and Ian G. Moss | Hamiltonians for Reduced Gravity | 18 pages, revtex, 3 postscript figures included | Phys.Rev. D56 (1997) 6284-6292 | 10.1103/PhysRevD.56.6284 | null | gr-qc hep-th | null | A generalised canonical formulation of gravity is devised for foliations of
spacetime with codimension $n\ge1$. The new formalism retains n-dimensional
covariance and is especially suited to 2+2 decompositions of spacetime. It is
also possible to use the generalised formalism to obtain boundary contributions
to the 3... | [
{
"created": "Wed, 26 Mar 1997 17:28:23 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Grant",
"James D. E.",
""
],
[
"Moss",
"Ian G.",
""
]
] | A generalised canonical formulation of gravity is devised for foliations of spacetime with codimension $n\ge1$. The new formalism retains n-dimensional covariance and is especially suited to 2+2 decompositions of spacetime. It is also possible to use the generalised formalism to obtain boundary contributions to the 3+1... |
2211.04909 | Francesco Sartini | Francesco Sartini | Hidden Symmetries in Gravity : Black holes and other minisuperspaces | PhD thesis, 2022 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This thesis is dedicated to the study of symmetries in reduced models of
gravity, with some frozen degrees of freedom. We focus on the minisuperspace
reduction whith a finite number of degrees of freedom. Minisuperspaces are
treated as mechanical models, evolving in one spacetime direction. This
evolution parameter r... | [
{
"created": "Wed, 9 Nov 2022 14:22:51 GMT",
"version": "v1"
}
] | 2022-11-10 | [
[
"Sartini",
"Francesco",
""
]
] | This thesis is dedicated to the study of symmetries in reduced models of gravity, with some frozen degrees of freedom. We focus on the minisuperspace reduction whith a finite number of degrees of freedom. Minisuperspaces are treated as mechanical models, evolving in one spacetime direction. This evolution parameter rep... |
gr-qc/9507057 | Rafael D. Sorkin | Rafael D. Sorkin (ICN-UNAM and Syracuse University) | Quantum Measure Theory and its Interpretation | Changes to original version: correction to the description of the
quantum measure in the non relativistic case; some rewording in other places;
a few typos corrected. 23 pages, plaintex with 7 eps figures | in the book, Quantum Classical Correspondence: Proceedings of the
4th Drexel Symposium on Quantum Nonintegrability, held Philadelphia,
September 8-11, 1994, pages 229-251 (International Press, Cambridge Mass.
1997) D.H.~Feng and B-L~Hu, editors. | null | SU-GP-95-7-1 | gr-qc hep-th quant-ph | null | We propose a realistic, spacetime interpretation of quantum theory in which
reality constitutes a *single* history obeying a "law of motion" that makes
definite, but incomplete, predictions about its behavior. We associate a
"quantum measure" |S| to the set S of histories, and point out that |S|
fulfills a sum rule g... | [
{
"created": "Sun, 30 Jul 1995 22:00:53 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Jun 1997 04:38:46 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Sorkin",
"Rafael D.",
"",
"ICN-UNAM and Syracuse University"
]
] | We propose a realistic, spacetime interpretation of quantum theory in which reality constitutes a *single* history obeying a "law of motion" that makes definite, but incomplete, predictions about its behavior. We associate a "quantum measure" |S| to the set S of histories, and point out that |S| fulfills a sum rule gen... |
1305.4209 | Graeme Gossel | G. H. Gossel, J. C. Berengut, V. V. Flambaum, and G. F. Gribakin | Dense spectrum of resonances and spin-1/2 particle capture in a
near-black-hole metric | 6 pages, submitted to PRD | Phys. Rev. D 88, 027501 (2013) | 10.1103/PhysRevD.88.027501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that a spin-1/2 particle in the gravitational field of a massive body
of radius R which slightly exceeds the Schwarzschild radius r_s, possesses a
dense spectrum of narrow resonances. Their lifetimes and density tend to
infinity in the limit R -> r_s. We determine the cross section of the particle
capture int... | [
{
"created": "Sat, 18 May 2013 00:08:58 GMT",
"version": "v1"
},
{
"created": "Tue, 21 May 2013 02:57:33 GMT",
"version": "v2"
}
] | 2013-07-08 | [
[
"Gossel",
"G. H.",
""
],
[
"Berengut",
"J. C.",
""
],
[
"Flambaum",
"V. V.",
""
],
[
"Gribakin",
"G. F.",
""
]
] | We show that a spin-1/2 particle in the gravitational field of a massive body of radius R which slightly exceeds the Schwarzschild radius r_s, possesses a dense spectrum of narrow resonances. Their lifetimes and density tend to infinity in the limit R -> r_s. We determine the cross section of the particle capture into ... |
gr-qc/9804042 | Michael Grebeniuk | M.A. Grebeniuk, V.D. Ivashchuk and V.N. Melnikov | Multidimensional Cosmology for Intersecting p-Branes with Static
Internal Spaces | 10 pages, LaTeX, submitted to Gravitation and Cosmology | Grav.Cosmol. 4 (1998) 145-150 | null | null | gr-qc | null | Multidimensional cosmological model with static internal spaces describing
the evolution of an Einstein space of non-zero curvature and n internal spaces
is considered. The action contains several dilatonic scalar fields and
antisymmetric forms and lambda-term. When forms are chosen to be proportional
to volume forms... | [
{
"created": "Mon, 20 Apr 1998 12:10:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Grebeniuk",
"M. A.",
""
],
[
"Ivashchuk",
"V. D.",
""
],
[
"Melnikov",
"V. N.",
""
]
] | Multidimensional cosmological model with static internal spaces describing the evolution of an Einstein space of non-zero curvature and n internal spaces is considered. The action contains several dilatonic scalar fields and antisymmetric forms and lambda-term. When forms are chosen to be proportional to volume forms o... |
2103.17112 | Johannes M\"unch | Johannes M\"unch | Causal Structure of a recent Loop Quantum Gravity Black Hole Collapse
Model | 28 pages, 6 figures. Version accepted for publication in PRD | Phys. Rev. D 104, 046019 (2021) | 10.1103/PhysRevD.104.046019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The causal structure of the recent loop quantum gravity black hole collapse
model [1] is analysed. As the spacetime is only approximately diffeomorphism
invariant up to powers of $\hbar$, it is not straight forwardly possible to
find global conformally compactified coordinates and to construct the Penrose
diagram. Th... | [
{
"created": "Wed, 31 Mar 2021 14:30:31 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Aug 2021 10:53:12 GMT",
"version": "v2"
}
] | 2021-08-27 | [
[
"Münch",
"Johannes",
""
]
] | The causal structure of the recent loop quantum gravity black hole collapse model [1] is analysed. As the spacetime is only approximately diffeomorphism invariant up to powers of $\hbar$, it is not straight forwardly possible to find global conformally compactified coordinates and to construct the Penrose diagram. Ther... |
2012.00846 | Marie-Anne Bizouard | Marie-Anne Bizouard, Patricio Maturana-Russel, Alejandro
Torres-Forn\'e, Martin Obergaulinger, Pablo Cerd\'a-Dur\'an, Nelson
Christensen, Jos\'e A. Font, Renate Meyer | Inference of proto-neutron star properties from gravitational-wave data
in core-collapse supernovae | null | Phys. Rev. D 103, 063006 (2021) | 10.1103/PhysRevD.103.063006 | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | The eventual detection of gravitational waves from core-collapse supernovae
(CCSN) will help improve our current understanding of the explosion mechanism
of massive stars. The stochastic nature of the late post-bounce gravitational
wave signal due to the non-linear dynamics of the matter involved and the large
number... | [
{
"created": "Tue, 1 Dec 2020 21:34:25 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Nov 2021 15:13:31 GMT",
"version": "v2"
}
] | 2021-11-16 | [
[
"Bizouard",
"Marie-Anne",
""
],
[
"Maturana-Russel",
"Patricio",
""
],
[
"Torres-Forné",
"Alejandro",
""
],
[
"Obergaulinger",
"Martin",
""
],
[
"Cerdá-Durán",
"Pablo",
""
],
[
"Christensen",
"Nelson",
""
],
[
"Fon... | The eventual detection of gravitational waves from core-collapse supernovae (CCSN) will help improve our current understanding of the explosion mechanism of massive stars. The stochastic nature of the late post-bounce gravitational wave signal due to the non-linear dynamics of the matter involved and the large number o... |
gr-qc/0307119 | Lorenzo Iorio | Lorenzo Iorio | New perspectives in testing the general relativistic Lense--Thirring
effect | Latex, 8 pages, 1 table, no figure. Paper presented at the Fourth
International Conference on Physics Beyond the Standard Model "Beyond the
Desert" '03 Fundamental Experimental and Theoretical Developments in Particle
Physics Accelerator-, Non-Accelerator and Space Approaches, Castle Ringberg,
Tegernsee, German... | Proceedings of the Fourth Tegernsee International Conference on
Particle Physics Beyond the Standard Model, BEYOND 2003, Castle Ringberg,
Tegernsee, Germany, 9-14 June 2003, Springer, Berlin, 2004, pp. 513-520. | null | null | gr-qc astro-ph physics.space-ph | null | Testing the effects predicted by the General Theory of Relativity, in its
linearized weak field and slow motion approximation, in the Solar System is
difficult because they are very small. Among them the post-Newtonian
gravitomagnetic Lense-Thirring effect, or dragging of the inertial frames, on
the orbital motion of... | [
{
"created": "Wed, 30 Jul 2003 14:03:39 GMT",
"version": "v1"
}
] | 2007-11-12 | [
[
"Iorio",
"Lorenzo",
""
]
] | Testing the effects predicted by the General Theory of Relativity, in its linearized weak field and slow motion approximation, in the Solar System is difficult because they are very small. Among them the post-Newtonian gravitomagnetic Lense-Thirring effect, or dragging of the inertial frames, on the orbital motion of a... |
1505.01562 | Cosimo Bambi | Yifan Cheng, Dan Liu, Sourabh Nampalliwar, Cosimo Bambi | X-ray spectropolarimetric signature of a warped disk around a
stellar-mass black hole | 10 pages, 9 figures. v2: refereed version | Class.Quant.Grav.33:125015,2016 | 10.1088/0264-9381/33/12/125015 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes in X-ray binaries are often assumed to be rotating perpendicular
to the plane of the accretion disk and parallel to the orbital plane of the
binary. While the Bardeen-Petterson effect forces the inner part of the
accretion disk to be aligned with the equatorial plane of a spinning black
hole, the disk may... | [
{
"created": "Thu, 7 May 2015 02:39:17 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Apr 2016 06:30:26 GMT",
"version": "v2"
}
] | 2016-05-17 | [
[
"Cheng",
"Yifan",
""
],
[
"Liu",
"Dan",
""
],
[
"Nampalliwar",
"Sourabh",
""
],
[
"Bambi",
"Cosimo",
""
]
] | Black holes in X-ray binaries are often assumed to be rotating perpendicular to the plane of the accretion disk and parallel to the orbital plane of the binary. While the Bardeen-Petterson effect forces the inner part of the accretion disk to be aligned with the equatorial plane of a spinning black hole, the disk may b... |
1505.00223 | Jinsong Yang | Jinsong Yang, Yongge Ma | Graphical method in loop quantum gravity: I. Derivation of the closed
formula for the matrix element of the volume operator | 42 pages; a few modifications | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To adopt a practical method to calculate the action of geometrical operators
on quantum states is a crucial task in loop quantum gravity. In the series of
papers, we will introduce a graphical method, developed by Yutsis and Brink, to
loop quantum gravity along the line of previous works. The graphical method
provide... | [
{
"created": "Fri, 1 May 2015 17:16:49 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Jun 2015 14:38:44 GMT",
"version": "v2"
},
{
"created": "Wed, 24 Feb 2016 04:35:01 GMT",
"version": "v3"
}
] | 2016-02-25 | [
[
"Yang",
"Jinsong",
""
],
[
"Ma",
"Yongge",
""
]
] | To adopt a practical method to calculate the action of geometrical operators on quantum states is a crucial task in loop quantum gravity. In the series of papers, we will introduce a graphical method, developed by Yutsis and Brink, to loop quantum gravity along the line of previous works. The graphical method provides ... |
gr-qc/0509057 | Neven Bilic | Hrvoje Abraham (1), Neven Bilic (1) and Tapas K. Das (2) ((1) Rudjer
Boskovic Institute, Zagreb, Croatia, (2) Harish Chandra Research Institute,
Allahabadh, India) | Acoustic horizons in axially symmetric relativistic accretion | 29 pages, 12 figures, significantly revised, sections on phonon
propagation, phonon quantization, non-axisymmetric accretion and acoustic
superradiance added, references added; to appear in Class. Quant. Grav.
without section 2.4 which has been kept here for pedagogical reasons; section
2.4 slightly altered, mi... | Class.Quant.Grav. 23 (2006) 2371-2393 | 10.1088/0264-9381/23/7/010 | null | gr-qc astro-ph hep-th | null | Transonic accretion onto astrophysical objects is a unique example of
analogue black hole realized in nature. In the framework of acoustic geometry
we study axially symmetric accretion and wind of a rotating astrophysical black
hole or of a neutron star assuming isentropic flow of a fluid described by a
polytropic eq... | [
{
"created": "Thu, 15 Sep 2005 07:34:15 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Feb 2006 14:53:44 GMT",
"version": "v2"
},
{
"created": "Wed, 26 Apr 2006 08:37:25 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Abraham",
"Hrvoje",
""
],
[
"Bilic",
"Neven",
""
],
[
"Das",
"Tapas K.",
""
]
] | Transonic accretion onto astrophysical objects is a unique example of analogue black hole realized in nature. In the framework of acoustic geometry we study axially symmetric accretion and wind of a rotating astrophysical black hole or of a neutron star assuming isentropic flow of a fluid described by a polytropic equa... |
1807.06432 | Shuxun Tian | Shuxun Tian | 4G: Pure fourth-order gravity | 9+3 pages, 1 figure, submitted to PRD | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein field equations are second-order differential equations. In this
paper, we propose a new gravity theory with pure fourth-order field equations,
which we call 4G for brevity. We discuss the applications of 4G in cosmology,
gravitational waves, and local gravitational systems. 4G predicts the scale
factor $a\p... | [
{
"created": "Tue, 17 Jul 2018 13:50:54 GMT",
"version": "v1"
}
] | 2018-07-18 | [
[
"Tian",
"Shuxun",
""
]
] | Einstein field equations are second-order differential equations. In this paper, we propose a new gravity theory with pure fourth-order field equations, which we call 4G for brevity. We discuss the applications of 4G in cosmology, gravitational waves, and local gravitational systems. 4G predicts the scale factor $a\pro... |
gr-qc/9612032 | Haret Rosu | J. Socorro, H.C. Rosu | Supersymmetric double Darboux method in quantum cosmology | 4 pages, Proc. of the 2nd Mex. School on Grav. and Math. Phys., Eds.
A. Garcia et al., available also at http://kaluza.physik.uni-konstanz.de/2MS | null | null | null | gr-qc | null | We briefly present the supersymmetric double Darboux method and next apply it
to the continuum of the quantum Taub cosmological model as a toy model in order
to generate a one-parameter family of bosonic Taub potentials and the
corresponding wavefunctions
| [
{
"created": "Thu, 12 Dec 1996 22:22:00 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jan 1997 17:30:00 GMT",
"version": "v2"
},
{
"created": "Sun, 2 Feb 1997 23:55:00 GMT",
"version": "v3"
},
{
"created": "Fri, 20 Feb 1998 00:59:03 GMT",
"version": "v4"
}
] | 2008-02-03 | [
[
"Socorro",
"J.",
""
],
[
"Rosu",
"H. C.",
""
]
] | We briefly present the supersymmetric double Darboux method and next apply it to the continuum of the quantum Taub cosmological model as a toy model in order to generate a one-parameter family of bosonic Taub potentials and the corresponding wavefunctions |
2404.06297 | Victoria Volkova | S. Mironov and V. Volkova | Complete stability for spherically symmetric backgrounds in beyond
Horndeski theory | 16 pages, submitted to IJMPA ICNFP2022 Special Issue | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a general static, spherically symmetric background in the
quadratic beyond Horndeski theory and analyse the behaviour of linear
perturbations in both parity odd and parity even sectors. We derive a full set
of stability conditions for an arbitrary static, spherically symmetric solution
which guarantees ab... | [
{
"created": "Tue, 9 Apr 2024 13:23:12 GMT",
"version": "v1"
}
] | 2024-04-10 | [
[
"Mironov",
"S.",
""
],
[
"Volkova",
"V.",
""
]
] | We consider a general static, spherically symmetric background in the quadratic beyond Horndeski theory and analyse the behaviour of linear perturbations in both parity odd and parity even sectors. We derive a full set of stability conditions for an arbitrary static, spherically symmetric solution which guarantees abse... |
gr-qc/9407037 | null | A. Lukas | Wormhole Effects on Yang-Mills Theory | 15 pages, TUM--TH--165/94 | Nucl.Phys.B442:533-548,1995 | 10.1016/0550-3213(95)00116-A | null | gr-qc | null | In this paper wormhole effects on $SO(3)$ YM theory are examined. The
wormhole wave functions for the scalar, the vector and the tensor expansion
modes are computed assuming a small gauge coupling which leads to an effective
decoupling of gravity and YM theory. These results are used to determine the
wormhole vertice... | [
{
"created": "Mon, 25 Jul 1994 12:55:07 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Lukas",
"A.",
""
]
] | In this paper wormhole effects on $SO(3)$ YM theory are examined. The wormhole wave functions for the scalar, the vector and the tensor expansion modes are computed assuming a small gauge coupling which leads to an effective decoupling of gravity and YM theory. These results are used to determine the wormhole vertices ... |
2101.05295 | Jakub Bilski | Jakub Bilski | Continuously distributed holonomy-flux algebra | 5 pages, 2 figures | null | null | null | gr-qc hep-lat hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The procedure of the holonomy-flux algebra construction along a piecewise
linear path, which consists of a countably infinite number of pieces, is
described in this article. The related construction approximates the continuous
distribution of the holonomy-flux algebra location along a smooth link
arbitrarily well. Th... | [
{
"created": "Wed, 13 Jan 2021 19:00:06 GMT",
"version": "v1"
}
] | 2021-01-15 | [
[
"Bilski",
"Jakub",
""
]
] | The procedure of the holonomy-flux algebra construction along a piecewise linear path, which consists of a countably infinite number of pieces, is described in this article. The related construction approximates the continuous distribution of the holonomy-flux algebra location along a smooth link arbitrarily well. The ... |
1007.4189 | Peter Komorowski | P. G. Komorowski, S. R. Valluri, M. Houde | The Carter Constant for Inclined Orbits About a Massive Kerr Black Hole:
I. circular orbits | 51 pages, 8 figures, accepted by Classical and Quantum Gravity on
September 22nd, 2010 | Class.Quant.Grav.27:225023,2010 | 10.1088/0264-9381/27/22/225023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In an extreme binary black hole system, an orbit will increase its angle of
inclination (i) as it evolves in Kerr spacetime. We focus our attention on the
behaviour of the Carter constant (Q) for near-polar orbits; and develop an
analysis that is independent of and complements radiation reaction models. For
a Schwarz... | [
{
"created": "Fri, 23 Jul 2010 19:20:04 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Sep 2010 18:46:37 GMT",
"version": "v2"
},
{
"created": "Sat, 20 Nov 2010 22:29:29 GMT",
"version": "v3"
},
{
"created": "Wed, 19 Jan 2011 18:50:25 GMT",
"version": "v4"
}
] | 2011-01-20 | [
[
"Komorowski",
"P. G.",
""
],
[
"Valluri",
"S. R.",
""
],
[
"Houde",
"M.",
""
]
] | In an extreme binary black hole system, an orbit will increase its angle of inclination (i) as it evolves in Kerr spacetime. We focus our attention on the behaviour of the Carter constant (Q) for near-polar orbits; and develop an analysis that is independent of and complements radiation reaction models. For a Schwarzsc... |
1611.07898 | Tomislav Prokopec | Anja Marunovic, Tomislav Prokopec | Planck scale operators, inflation and fine tuning | 9 pages, 0 figures | Phys. Rev. D 96, 043512 (2017) | 10.1103/PhysRevD.96.043512 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ultraviolet completion of the standard model plus gravity at and beyond the
Planck scale is a daunting problem to which no generally accepted solution
exists. Principal obstacles include (a) lack of data at the Planck scale (b)
nonrenormalizability of gravity and (c) unitarity problem. Here we make a
simple observati... | [
{
"created": "Wed, 23 Nov 2016 17:32:59 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Marunovic",
"Anja",
""
],
[
"Prokopec",
"Tomislav",
""
]
] | Ultraviolet completion of the standard model plus gravity at and beyond the Planck scale is a daunting problem to which no generally accepted solution exists. Principal obstacles include (a) lack of data at the Planck scale (b) nonrenormalizability of gravity and (c) unitarity problem. Here we make a simple observation... |
1909.07968 | William East | William E. East and Luis Lehner | Fate of a neutron star with an endoparasitic black hole and implications
for dark matter | 13 pages, 9 figures; revised to match PRD version | Phys. Rev. D 100, 124026 (2019) | 10.1103/PhysRevD.100.124026 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the dynamics and observational signatures of a neutron star being
consumed by a much less massive black hole residing inside the star. This
phenomenon could arise in a variety of scenarios, including after the capture
of a primordial black hole, or in some models of asymmetric dark matter where
the dark matt... | [
{
"created": "Tue, 17 Sep 2019 17:58:17 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Dec 2019 15:39:10 GMT",
"version": "v2"
}
] | 2019-12-11 | [
[
"East",
"William E.",
""
],
[
"Lehner",
"Luis",
""
]
] | We study the dynamics and observational signatures of a neutron star being consumed by a much less massive black hole residing inside the star. This phenomenon could arise in a variety of scenarios, including after the capture of a primordial black hole, or in some models of asymmetric dark matter where the dark matter... |
gr-qc/0512049 | Valter Moretti | Valter Moretti (Math. Dept - Trento Univ.) | Uniqueness theorem for BMS-invariant states of scalar QFT on the null
boundary of asymptotically flat spacetimes and bulk-boundary observable
algebra correspondence | Final version, accepted for publication in Commun. Math. Phys | Commun.Math.Phys. 268 (2006) 727-756 | 10.1007/s00220-006-0107-0 | UTM-689 | gr-qc hep-th math-ph math.MP | null | Scalar BMS-invariant QFT defined on the causal boundary $\scri$ of an
asymptotically flat spacetime is discussed. (a)(i) It is noticed that the
natural $BMS$ invariant pure quasifree state $\lambda$ on $\cW(\scri)$,
recently introduced by Dappiaggi, Moretti an Pinamonti, enjoys positivity of
the self-adjoint generato... | [
{
"created": "Wed, 7 Dec 2005 19:42:38 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Apr 2006 17:42:58 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Moretti",
"Valter",
"",
"Math. Dept - Trento Univ."
]
] | Scalar BMS-invariant QFT defined on the causal boundary $\scri$ of an asymptotically flat spacetime is discussed. (a)(i) It is noticed that the natural $BMS$ invariant pure quasifree state $\lambda$ on $\cW(\scri)$, recently introduced by Dappiaggi, Moretti an Pinamonti, enjoys positivity of the self-adjoint generator ... |
2106.03140 | Luis A. Sanchez | Fabi\'an H. Zuluaga and Luis A. S\'anchez | Accretion disk around a Schwarzschild black hole in asymptotic safety | 15 pages, 9 figures, 2 tables, discussion expanded, references added,
conclusions unchanged, accepted for publication in EPJC | null | 10.1140/epjc/s10052-021-09644-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study quantum gravity effects on radiation properties of thin accretion
disks around a renormalization group improved (RGI-) Schwarzschild black hole.
In the infrared (IR) limit of the asymptotically safe theory with higher
derivatives, the running Newton coupling G(r) depends on a free parameter which
encodes the... | [
{
"created": "Sun, 6 Jun 2021 14:42:07 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Sep 2021 16:25:54 GMT",
"version": "v2"
}
] | 2021-10-04 | [
[
"Zuluaga",
"Fabián H.",
""
],
[
"Sánchez",
"Luis A.",
""
]
] | We study quantum gravity effects on radiation properties of thin accretion disks around a renormalization group improved (RGI-) Schwarzschild black hole. In the infrared (IR) limit of the asymptotically safe theory with higher derivatives, the running Newton coupling G(r) depends on a free parameter which encodes the q... |
gr-qc/0106075 | Bernhard Haisch | Bernard Haisch and Alfonso Rueda | Geometrodynamics, Inertia and the Quantum Vacuum | Presented at the AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Salt
Lake City, July 8--11, 2001 | null | null | AIAA 2001-3360 | gr-qc | null | Why does {\bf F} equal m{\bf a} in Newton's equation of motion? How does a
gravitational field produce a force? Why are inertial mass and gravitational
mass the same? It appears that all three of these seemingly axiomatic
foundational questions have an answer involving an identical physical process:
interaction betwe... | [
{
"created": "Mon, 25 Jun 2001 19:51:53 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Haisch",
"Bernard",
""
],
[
"Rueda",
"Alfonso",
""
]
] | Why does {\bf F} equal m{\bf a} in Newton's equation of motion? How does a gravitational field produce a force? Why are inertial mass and gravitational mass the same? It appears that all three of these seemingly axiomatic foundational questions have an answer involving an identical physical process: interaction between... |
0904.4873 | Lee Lindblom | Lee Lindblom and Bela Szilagyi | An Improved Gauge Driver for the Generalized Harmonic Einstein System | v2: final version to be published in PRD; 15 pages, 5 figures | Phys.Rev.D80:084019,2009 | 10.1103/PhysRevD.80.084019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new gauge driver is introduced for the generalized harmonic (GH)
representation of Einstein's equation. This new driver allows a rather general
class of gauge conditions to be implemented in a way that maintains the
hyperbolicity of the combined evolution system. This driver is more stable and
effective, and unlike... | [
{
"created": "Thu, 30 Apr 2009 16:10:02 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Oct 2009 19:06:12 GMT",
"version": "v2"
}
] | 2009-10-29 | [
[
"Lindblom",
"Lee",
""
],
[
"Szilagyi",
"Bela",
""
]
] | A new gauge driver is introduced for the generalized harmonic (GH) representation of Einstein's equation. This new driver allows a rather general class of gauge conditions to be implemented in a way that maintains the hyperbolicity of the combined evolution system. This driver is more stable and effective, and unlike p... |
2007.11029 | Jose Beltran Jimenez | Jose Beltran Jimenez, Dario Bettoni and Philippe Brax | Screening away the $H_0$ tension | 8 pages, 2 Figures. Accepted in IJMPD. Honorable mention in the
Gravity Research Foundation 2020 Awards for Essays on Gravitation | null | 10.1142/S0218271820430105 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This Essay explores consequences of a dark non-linear electromagnetic sector
in a Universe with a net dark charge for matter. The cosmological dynamics can
be described by a Lema\^itre model and understood thanks to a screening
mechanism driven by the electromagnetic non-linearities that suppress the dark
force on sm... | [
{
"created": "Tue, 21 Jul 2020 18:21:31 GMT",
"version": "v1"
}
] | 2020-11-26 | [
[
"Jimenez",
"Jose Beltran",
""
],
[
"Bettoni",
"Dario",
""
],
[
"Brax",
"Philippe",
""
]
] | This Essay explores consequences of a dark non-linear electromagnetic sector in a Universe with a net dark charge for matter. The cosmological dynamics can be described by a Lema\^itre model and understood thanks to a screening mechanism driven by the electromagnetic non-linearities that suppress the dark force on smal... |
2108.00005 | Toby Wiseman | Alexander Adam, Pau Figueras, Ted Jacobson, Toby Wiseman | Rotating black holes in Einstein-aether theory | 61 pages, 26 figures; v2. minor amendments and corrections,
references added; v3. minor additions, journal version | null | 10.1088/1361-6382/ac5053 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce new methods to numerically construct for the first time
stationary axisymmetric black hole solutions in Einstein-aether theory and
study their properties. The key technical challenge is to impose regularity at
the spin-2, 1, and 0 wave mode horizons. Interestingly we find the metric
horizon, and various ... | [
{
"created": "Fri, 30 Jul 2021 18:00:00 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Oct 2021 18:31:34 GMT",
"version": "v2"
},
{
"created": "Mon, 13 Jun 2022 18:17:38 GMT",
"version": "v3"
}
] | 2022-06-22 | [
[
"Adam",
"Alexander",
""
],
[
"Figueras",
"Pau",
""
],
[
"Jacobson",
"Ted",
""
],
[
"Wiseman",
"Toby",
""
]
] | We introduce new methods to numerically construct for the first time stationary axisymmetric black hole solutions in Einstein-aether theory and study their properties. The key technical challenge is to impose regularity at the spin-2, 1, and 0 wave mode horizons. Interestingly we find the metric horizon, and various wa... |
gr-qc/0609079 | Leo Brewin | Leo Brewin | A simple expression for the ADM mass | 9 pages, 1 figure | Gen.Rel.Grav.39:521-528,2007 | 10.1007/s10714-007-0403-9 | null | gr-qc | null | We show by an almost elementary calculation that the ADM mass of an
asymptotically flat space can be computed as a limit involving a rate of change
of area of a closed 2-surface. The result is essentially the same as that given
by Brown and York. We will prove this result in two ways, first by direct
calculation from... | [
{
"created": "Wed, 20 Sep 2006 12:34:57 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Brewin",
"Leo",
""
]
] | We show by an almost elementary calculation that the ADM mass of an asymptotically flat space can be computed as a limit involving a rate of change of area of a closed 2-surface. The result is essentially the same as that given by Brown and York. We will prove this result in two ways, first by direct calculation from t... |
2102.03820 | Wei-Liang Qian | Wei-Liang Qian, Songbai Chen, Cheng-Gang Shao, Bin Wang and Rui-Hong
Yue | Cuspy and fractured black hole shadows in a toy model with axisymmetry | 15 pages, 3 figures | null | 10.1140/epjc/s10052-022-10033-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cuspy shadow was first reported for hairy rotating black holes, whose metrics
deviate significantly from the Kerr one. The non-smooth edge of the shadow is
attributed to a transition between different branches of unstable but bounded
orbits, known as the fundamental photon orbits, which end up at the light
rings. In ... | [
{
"created": "Sun, 7 Feb 2021 15:32:08 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Feb 2021 02:08:31 GMT",
"version": "v2"
},
{
"created": "Sun, 23 May 2021 03:08:10 GMT",
"version": "v3"
},
{
"created": "Mon, 10 Jan 2022 18:23:42 GMT",
"version": "v4"
}
] | 2022-02-16 | [
[
"Qian",
"Wei-Liang",
""
],
[
"Chen",
"Songbai",
""
],
[
"Shao",
"Cheng-Gang",
""
],
[
"Wang",
"Bin",
""
],
[
"Yue",
"Rui-Hong",
""
]
] | Cuspy shadow was first reported for hairy rotating black holes, whose metrics deviate significantly from the Kerr one. The non-smooth edge of the shadow is attributed to a transition between different branches of unstable but bounded orbits, known as the fundamental photon orbits, which end up at the light rings. In se... |
gr-qc/0102003 | A. Miyazaki | A. Miyazaki | Time-Variation of the Gravitational Constant and the Machian Solution in
the Brans-Dicke Theory | 10 pages, LaTeX2e | null | null | null | gr-qc | null | The Machian cosmological solution satisfying $\phi =O(\rho /\omega)$ for the
perfect-fluid with negative pressure is discussed. When the coefficient of the
equation of state $\gamma \to -1/3$, the gravitational constant approaches to
constant. If we assume the present mass density $\rho_{0}\sim \rho_{c}$
(critical de... | [
{
"created": "Thu, 1 Feb 2001 16:57:24 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Mar 2001 15:33:25 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Miyazaki",
"A.",
""
]
] | The Machian cosmological solution satisfying $\phi =O(\rho /\omega)$ for the perfect-fluid with negative pressure is discussed. When the coefficient of the equation of state $\gamma \to -1/3$, the gravitational constant approaches to constant. If we assume the present mass density $\rho_{0}\sim \rho_{c}$ (critical dens... |
2010.14473 | Gerard Clement | G\'erard Cl\'ement | The gravimagnetic dipole | 14 pages, discussion of first maw expanded, and references added | Class. Quantum Grav. 38 (2021) 075003 | null | LAPTH-044/20 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate a previously constructed stationary solution of the vacuum
Einstein equations, which represents a system of two non-extreme black holes
with equal masses and opposite NUT charges, connected by a Misner string with
tension. For large separations, the inverse square law force measured by this
tension is ... | [
{
"created": "Tue, 27 Oct 2020 17:32:41 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Feb 2021 12:49:48 GMT",
"version": "v2"
}
] | 2021-03-01 | [
[
"Clément",
"Gérard",
""
]
] | We investigate a previously constructed stationary solution of the vacuum Einstein equations, which represents a system of two non-extreme black holes with equal masses and opposite NUT charges, connected by a Misner string with tension. For large separations, the inverse square law force measured by this tension is at... |
gr-qc/0602069 | Brihaye Yves | Y. Brihaye, E. Radu | Euclidean solutions in Einstein-Yang-Mills-dilaton theory | 11 pages, 6 figures, discussion extended, figure clarified | Phys.Lett. B636 (2006) 212-220 | 10.1016/j.physletb.2006.04.001 | null | gr-qc hep-th | null | We present arguments for the existence of a new type of solutions of the
Euclidean Einstein-Yang-Mills-dilaton theory in $d=4$ dimensions. Possesing
nonvanishing nonabelian charges, these nonselfdual configurations have no
counterparts on the Lorentzian section. They provide, however, new saddle
points in the Euclide... | [
{
"created": "Fri, 17 Feb 2006 13:25:10 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Mar 2006 15:04:38 GMT",
"version": "v2"
},
{
"created": "Sat, 29 Apr 2006 14:14:57 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Brihaye",
"Y.",
""
],
[
"Radu",
"E.",
""
]
] | We present arguments for the existence of a new type of solutions of the Euclidean Einstein-Yang-Mills-dilaton theory in $d=4$ dimensions. Possesing nonvanishing nonabelian charges, these nonselfdual configurations have no counterparts on the Lorentzian section. They provide, however, new saddle points in the Euclidean... |
1409.6978 | Burkhard Kleihaus | Vladimir Dzhunushaliev, Vladimir Folomeev, Christian Hoffmann,
Burkhard Kleihaus and Jutta Kunz | Boson Stars with Nontrivial Topology | 21 pages, 9 figures | Phys.Rev. D90 (2014) 124038 | 10.1103/PhysRevD.90.124038 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct boson star solutions in the presence of a phantom field,
allowing for a nontrivial topology of the solutions. The wormholes residing at
the core of the configurations lead to a number of qualitative changes of the
boson star solutions. In particular, the typical spiraling dependence of the
mass and the p... | [
{
"created": "Wed, 24 Sep 2014 14:48:13 GMT",
"version": "v1"
}
] | 2014-12-15 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
],
[
"Hoffmann",
"Christian",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
]
] | We construct boson star solutions in the presence of a phantom field, allowing for a nontrivial topology of the solutions. The wormholes residing at the core of the configurations lead to a number of qualitative changes of the boson star solutions. In particular, the typical spiraling dependence of the mass and the par... |
2404.18804 | Grigoris Panotopoulos | Leonardo Balart, Grigoris Panotopoulos, \'Angel Rinc\'on | Thermodynamics of the quantum Schwarzschild black hole | 15 pages, 2 figures, accepted for publication in EPJ Plus | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss some thermodynamic properties as well as the stability of a
quantum Schwarzschild black hole, comparing the results with those obtained
within a bumblebee gravity model. In particular, the Hawking temperature,
$T_H$, the entropy, $S$, the heat capacity, $C$, and the Gibbs free energy,
$G$, are computed for... | [
{
"created": "Mon, 29 Apr 2024 15:42:54 GMT",
"version": "v1"
}
] | 2024-04-30 | [
[
"Balart",
"Leonardo",
""
],
[
"Panotopoulos",
"Grigoris",
""
],
[
"Rincón",
"Ángel",
""
]
] | We discuss some thermodynamic properties as well as the stability of a quantum Schwarzschild black hole, comparing the results with those obtained within a bumblebee gravity model. In particular, the Hawking temperature, $T_H$, the entropy, $S$, the heat capacity, $C$, and the Gibbs free energy, $G$, are computed for b... |
gr-qc/9506069 | Hans-Juergen Matschull | Hans-Juergen Matschull | Three Dimensional Canonical Quantum Gravity | 82 pages, uses LaTeX2e and PiCTeX | Class.Quant.Grav.12:2621-2704,1995 | 10.1088/0264-9381/12/11/002 | KCL-TH-95-5 | gr-qc | null | General aspects of vielbein representation, ADM formulation and canonical
quantization of gravity are reviewed using pure gravity in three dimensions as
a toy model. The classical part focusses on the role of observers in general
relativity, which will later be identified with quantum observers. A precise
definition ... | [
{
"created": "Wed, 28 Jun 1995 17:57:39 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Matschull",
"Hans-Juergen",
""
]
] | General aspects of vielbein representation, ADM formulation and canonical quantization of gravity are reviewed using pure gravity in three dimensions as a toy model. The classical part focusses on the role of observers in general relativity, which will later be identified with quantum observers. A precise definition of... |
1706.00674 | Saibal Ray | Dibyendu Shee, Debabrata Deb, Shounak Ghosh, B.K. Guha and Saibal Ray | On the features of Matese-Whitman mass function | 15 pages, 12 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we exhaustively examine the physical status of the
socalled Matese-Whitman mass function [J.J. Matese and P.G. Whitman, Phys. Rev.
D, 22, 1270 (1980)]. As a first step, we construct the relevant Einstein field
equations with an anisotropic matter distribution under the approach of
Conformal killi... | [
{
"created": "Wed, 31 May 2017 18:20:54 GMT",
"version": "v1"
}
] | 2017-06-05 | [
[
"Shee",
"Dibyendu",
""
],
[
"Deb",
"Debabrata",
""
],
[
"Ghosh",
"Shounak",
""
],
[
"Guha",
"B. K.",
""
],
[
"Ray",
"Saibal",
""
]
] | In the present paper we exhaustively examine the physical status of the socalled Matese-Whitman mass function [J.J. Matese and P.G. Whitman, Phys. Rev. D, 22, 1270 (1980)]. As a first step, we construct the relevant Einstein field equations with an anisotropic matter distribution under the approach of Conformal killing... |
0909.3800 | Marco Pizzi | M. Pizzi | Second comment to "Invariance of the tunneling method" | 4 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I reply to the four points raised by S. A. Hayward, R. Di Criscienzo, M.
Nadalini, L. Vanzo, S. Zerbini (arXiv:0909.2956v1) against my comment
(arXiv:0907.2020v1) to their previous article. I maintain my position on the
wrongness of their paper, reporting also another mistake.
| [
{
"created": "Mon, 21 Sep 2009 15:16:49 GMT",
"version": "v1"
}
] | 2009-09-22 | [
[
"Pizzi",
"M.",
""
]
] | I reply to the four points raised by S. A. Hayward, R. Di Criscienzo, M. Nadalini, L. Vanzo, S. Zerbini (arXiv:0909.2956v1) against my comment (arXiv:0907.2020v1) to their previous article. I maintain my position on the wrongness of their paper, reporting also another mistake. |
1501.02843 | Reinoud Slagter | Reinoud Jan Slagter and Supriya Pan | A New Fate of a Warped 5D FRW Model with a U(1) Scalar Gauge Field | Final version; 10 pages and 14 figures; to appear in Found. of Phys | null | 10.1007/s10701-016-0002-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | If we live on the weak brane with zero effective cosmological constant in a
warped 5D bulk spacetime, gravitational waves and brane fluctuations can be
generated by a part of the 5D Weyl tensor and carries information of the
gravitational field outside the brane. We consider on a cylindrical symmetric
warped FRW back... | [
{
"created": "Mon, 12 Jan 2015 22:39:32 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Jan 2015 13:04:53 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Jan 2015 06:22:26 GMT",
"version": "v3"
},
{
"created": "Mon, 30 Mar 2015 17:01:51 GMT",
"version": "v4"
},
{
"c... | 2016-04-20 | [
[
"Slagter",
"Reinoud Jan",
""
],
[
"Pan",
"Supriya",
""
]
] | If we live on the weak brane with zero effective cosmological constant in a warped 5D bulk spacetime, gravitational waves and brane fluctuations can be generated by a part of the 5D Weyl tensor and carries information of the gravitational field outside the brane. We consider on a cylindrical symmetric warped FRW backgr... |
0907.2205 | Ernesto F. Eiroa | Ernesto F. Eiroa | Thin-shell wormholes with a generalized Chaplygin gas | 14 pages, 6 figures; v2: typos corrected and minor rewording | Phys.Rev.D80:044033,2009 | 10.1103/PhysRevD.80.044033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, spherically symmetric thin-shell wormholes supported by a
generalized Chaplygin gas are constructed and their stability under
perturbations preserving the symmetry is studied. Wormholes with charge and
with a cosmological constant are analyzed and the results are compared with
those obtained for the ... | [
{
"created": "Mon, 13 Jul 2009 16:22:15 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Aug 2009 17:48:59 GMT",
"version": "v2"
}
] | 2009-08-28 | [
[
"Eiroa",
"Ernesto F.",
""
]
] | In this article, spherically symmetric thin-shell wormholes supported by a generalized Chaplygin gas are constructed and their stability under perturbations preserving the symmetry is studied. Wormholes with charge and with a cosmological constant are analyzed and the results are compared with those obtained for the or... |
1302.6717 | Timothy Clifton | Timothy Clifton | Back-Reaction in Relativistic Cosmology | 13 pages, 2 figures. Based on a talk given at the 13th Marcel
Grossmann meeting | IJMPD 22 (2013) 133004 | 10.1142/S0218271813300048 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce the concept of back-reaction in relativistic cosmological
modeling. Roughly speaking, this can be thought of as the difference between
the large-scale behaviour of an inhomogeneous cosmological solution of
Einstein's equations, and a homogeneous and isotropic solution that is a
best-fit to either the ave... | [
{
"created": "Wed, 27 Feb 2013 10:45:46 GMT",
"version": "v1"
}
] | 2015-06-15 | [
[
"Clifton",
"Timothy",
""
]
] | We introduce the concept of back-reaction in relativistic cosmological modeling. Roughly speaking, this can be thought of as the difference between the large-scale behaviour of an inhomogeneous cosmological solution of Einstein's equations, and a homogeneous and isotropic solution that is a best-fit to either the avera... |
1203.0040 | Jose Wadih Maluf Dr. | J. W. Maluf and F. F. Faria | Teleparallel gauge theory of gravity | 10 pages, no figures, 5 references added | Ann. Phys. (Berlin) vol. 524, 366-370 (2012) | 10.1002/andp.201200037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work a tetrad theory of gravity, invariant under conformal
transformations, is investigated. The action of the theory is similar to the
action of Maxwell's electromagnetism. The role of the electromagnetic gauge
potential is played by the trace of the torsion tensor of the Weitzenb\"ock
spacetime. It is shown... | [
{
"created": "Wed, 29 Feb 2012 22:53:53 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Jun 2012 18:13:45 GMT",
"version": "v2"
}
] | 2012-06-28 | [
[
"Maluf",
"J. W.",
""
],
[
"Faria",
"F. F.",
""
]
] | In this work a tetrad theory of gravity, invariant under conformal transformations, is investigated. The action of the theory is similar to the action of Maxwell's electromagnetism. The role of the electromagnetic gauge potential is played by the trace of the torsion tensor of the Weitzenb\"ock spacetime. It is shown t... |
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