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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9506070 | Dr John W. Barrett | John W. Barrett | Quantum Gravity as Topological Quantum Field Theory | 23 pages, amstex, JMP special issue (deadline permitting). (Text not
changed) | J.Math.Phys. 36 (1995) 6161-6179 | 10.1063/1.531239 | null | gr-qc quant-ph | null | The physics of quantum gravity is discussed within the framework of
topological quantum field theory. Some of the principles are illustrated with
examples taken from theories in which space-time is three dimensional.
| [
{
"created": "Wed, 28 Jun 1995 15:43:52 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jul 1995 12:05:09 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Barrett",
"John W.",
""
]
] | The physics of quantum gravity is discussed within the framework of topological quantum field theory. Some of the principles are illustrated with examples taken from theories in which space-time is three dimensional. |
2309.12527 | Rikpratik Sengupta | Rikpratik Sengupta, Shounak Ghosh and Mehedi Kalam | Lorentzian wormhole in the framework of loop quantum cosmology | 10 Pages, 4 Figures | Eur. Phys. J. C (2023) 83:830 | 10.1140/epjc/s10052-023-12002-y | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we construct a traversable static Lorentzian wormhole in the
effective scenario of Loop Quantum Cosmology (LQC), where the field equations
are modified due to the ultraviolet (UV) corrections introduced at large
space-time curvatures. A stable wormhole can be constructed in the effective
scenario witho... | [
{
"created": "Thu, 21 Sep 2023 22:56:14 GMT",
"version": "v1"
}
] | 2023-09-25 | [
[
"Sengupta",
"Rikpratik",
""
],
[
"Ghosh",
"Shounak",
""
],
[
"Kalam",
"Mehedi",
""
]
] | In this paper, we construct a traversable static Lorentzian wormhole in the effective scenario of Loop Quantum Cosmology (LQC), where the field equations are modified due to the ultraviolet (UV) corrections introduced at large space-time curvatures. A stable wormhole can be constructed in the effective scenario without... |
2006.03967 | Haroldo Cilas Duarte Lima Junior | Haroldo C. D. Lima Junior, Carolina L. Benone and Lu\'is C. B.
Crispino | Scalar absorption: Black holes versus wormholes | 10 pages, 13 figures. Accepted for publication in Physical Review D | Phys. Rev. D 101 124009 (2020) | 10.1103/PhysRevD.101.124009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the absorption of massless scalar waves in a geometry that
interpolates between the Schwarzschild solution and a wormhole that belongs to
the Morris-Thorne class of solutions. In the middle of the interpolation
branch, this geometry describes a regular black hole. We use the partial wave
approach to compute ... | [
{
"created": "Sat, 6 Jun 2020 20:38:55 GMT",
"version": "v1"
}
] | 2020-06-09 | [
[
"Junior",
"Haroldo C. D. Lima",
""
],
[
"Benone",
"Carolina L.",
""
],
[
"Crispino",
"Luís C. B.",
""
]
] | We study the absorption of massless scalar waves in a geometry that interpolates between the Schwarzschild solution and a wormhole that belongs to the Morris-Thorne class of solutions. In the middle of the interpolation branch, this geometry describes a regular black hole. We use the partial wave approach to compute th... |
1009.0882 | Fabio Scardigli | Fabio Scardigli, Christine Gruber, and Pisin Chen | Black Hole Remnants in the Early Universe | 31 pages, 24 figures, revtex4. Some references added, some minor
changes | Phys.Rev.D83:063507,2011 | 10.1103/PhysRevD.83.063507 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the production of primordial micro black holes (MBH) remnants in
the early universe. These objects induce the universe to be in a
matter-dominated era before the onset of inflation. Effects of such an epoch on
the CMB power spectrum are discussed and computed both analytically and
numerically. By comparis... | [
{
"created": "Sat, 4 Sep 2010 23:47:02 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Nov 2010 10:33:47 GMT",
"version": "v2"
}
] | 2011-03-22 | [
[
"Scardigli",
"Fabio",
""
],
[
"Gruber",
"Christine",
""
],
[
"Chen",
"Pisin",
""
]
] | We consider the production of primordial micro black holes (MBH) remnants in the early universe. These objects induce the universe to be in a matter-dominated era before the onset of inflation. Effects of such an epoch on the CMB power spectrum are discussed and computed both analytically and numerically. By comparison... |
0907.5008 | Leonardo Gualtieri | V. Cardoso, L. Gualtieri | Perturbations of Schwarzschild black holes in Dynamical Chern-Simons
modified gravity | 9 pages, 1 figure. Minor changes to match version accepted by Phys.
Rev. D | Phys.Rev.D80:064008,2009; Erratum-ibid.D81:089903,2010 | 10.1103/PhysRevD.80.064008 10.1103/PhysRevD.81.089903 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamical Chern-Simons (DCS) modified gravity is an attractive, yet
relatively unexplored, candidate to an alternative theory of gravity. The DCS
correction couples a dynamical scalar field to the gravitational field. In this
framework, we analyze the perturbation formalism and stability properties of
spherically sym... | [
{
"created": "Tue, 28 Jul 2009 21:59:56 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Sep 2009 15:59:23 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Cardoso",
"V.",
""
],
[
"Gualtieri",
"L.",
""
]
] | Dynamical Chern-Simons (DCS) modified gravity is an attractive, yet relatively unexplored, candidate to an alternative theory of gravity. The DCS correction couples a dynamical scalar field to the gravitational field. In this framework, we analyze the perturbation formalism and stability properties of spherically symme... |
gr-qc/0603002 | Vladimir S. Manko | V.S. Manko, J. Martin, E. Ruiz | Singular sources in the Demianski-Newman spacetimes | 22 pages, 5 figures; submitted to Classical and Quantum Gravity | Class.Quant.Grav. 23 (2006) 4473-4484 | 10.1088/0264-9381/23/13/011 | null | gr-qc | null | The analysis of singular regions in the NUT solutions carried out in the
recent paper (Manko and Ruiz, 2005 Class. Quantum Grav. 22, p.3555) is now
extended to the Demianski-Newman vacuum and electrovacuum spacetimes. We show
that the effect which produces the NUT parameter in a more general situation
remains essenti... | [
{
"created": "Wed, 1 Mar 2006 08:01:05 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Manko",
"V. S.",
""
],
[
"Martin",
"J.",
""
],
[
"Ruiz",
"E.",
""
]
] | The analysis of singular regions in the NUT solutions carried out in the recent paper (Manko and Ruiz, 2005 Class. Quantum Grav. 22, p.3555) is now extended to the Demianski-Newman vacuum and electrovacuum spacetimes. We show that the effect which produces the NUT parameter in a more general situation remains essential... |
gr-qc/0301076 | Sascha Husa | Sascha Husa, Christiane Lechner | Computer Algebra Applications for Numerical Relativity | 5 pages, no figures. To appear in the Proceedings of the Spanish
Relativity Meeting (ERE 2002), Mao, Menorca, Spain, 22-24 Sept 2002 | null | null | null | gr-qc | null | We discuss the application of computer algebra to problems commonly arising
in numerical relativity, such as the derivation of 3+1-splits, manipulation of
evolution equations and automatic code generation. Particular emphasis is put
on working with abstract index tensor quantities as much as possible.
| [
{
"created": "Tue, 21 Jan 2003 10:42:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Husa",
"Sascha",
""
],
[
"Lechner",
"Christiane",
""
]
] | We discuss the application of computer algebra to problems commonly arising in numerical relativity, such as the derivation of 3+1-splits, manipulation of evolution equations and automatic code generation. Particular emphasis is put on working with abstract index tensor quantities as much as possible. |
gr-qc/0302076 | Sigbjorn Hervik | John D. Barrow and Sigbjorn Hervik | Indefinite Information Processing in Ever-expanding Universes | 6 pages | Phys.Lett. B566 (2003) 1-7 | 10.1016/S0370-2693(03)00775-5 | null | gr-qc astro-ph | null | We show that generic anisotropic universes arbitrarily close to the open
Friedmann universe allow information processing to continue into the infinite
future if there is no cosmological constant or stable gravitationally repulsive
stress, and the spatial topology is non-compact. An infinite amount of
information can ... | [
{
"created": "Tue, 18 Feb 2003 18:10:04 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Barrow",
"John D.",
""
],
[
"Hervik",
"Sigbjorn",
""
]
] | We show that generic anisotropic universes arbitrarily close to the open Friedmann universe allow information processing to continue into the infinite future if there is no cosmological constant or stable gravitationally repulsive stress, and the spatial topology is non-compact. An infinite amount of information can be... |
1907.01152 | Alberto Molgado | Alberto Molgado and \'Angel Rodr\'iguez-L\'opez | Covariant momentum map for non-Abelian topological BF field theory | 28 pages, no figures | null | 10.1088/1361-6382/ab508f | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the inherent symmetries associated to the non-Abelian topological
BF theory from the geometric and covariant perspectives of the Lagrangian and
the multisymplectic formalisms. At the Lagrangian level, we classify the
symmetries of the theory as natural and Noether symmetries and construct the
associated No... | [
{
"created": "Tue, 2 Jul 2019 04:02:39 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Molgado",
"Alberto",
""
],
[
"Rodríguez-López",
"Ángel",
""
]
] | We analyze the inherent symmetries associated to the non-Abelian topological BF theory from the geometric and covariant perspectives of the Lagrangian and the multisymplectic formalisms. At the Lagrangian level, we classify the symmetries of the theory as natural and Noether symmetries and construct the associated Noet... |
2405.10013 | Wonwoo Lee | Hyeong-Chan Kim, Sung-Won Kim, Bum-Hoon Lee, Wonwoo Lee | Charged rotating wormholes: charge without charge | 24 pages, 3 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We present a family of charged rotating wormhole solutions to the
Einstein-Maxwell equations, supported by anisotropic matter fields. We first
revisit the charged static cases and analyze the conditions for the solution to
represent a wormhole geometry. The rotating geometry is obtained by applying
the Newman-Janis a... | [
{
"created": "Thu, 16 May 2024 11:58:48 GMT",
"version": "v1"
}
] | 2024-05-17 | [
[
"Kim",
"Hyeong-Chan",
""
],
[
"Kim",
"Sung-Won",
""
],
[
"Lee",
"Bum-Hoon",
""
],
[
"Lee",
"Wonwoo",
""
]
] | We present a family of charged rotating wormhole solutions to the Einstein-Maxwell equations, supported by anisotropic matter fields. We first revisit the charged static cases and analyze the conditions for the solution to represent a wormhole geometry. The rotating geometry is obtained by applying the Newman-Janis alg... |
gr-qc/0612077 | Lau Loi So | Lau Loi So | The modification of the Einstein and Landau-Lifshitz pseudotensrs | 10 pages | null | null | null | gr-qc | null | Deser et al. proposed a combination of the Einstein and Landau-Lifshitz
pseudotensors such that the second derivatives in vacuum are proportional to
the Bel-Robinson tensor. Stimulated by their work, the present paper discuss
the gravitational energy-momentum expression which has the same desirable
Bel-Robinson tenso... | [
{
"created": "Wed, 13 Dec 2006 08:35:39 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"So",
"Lau Loi",
""
]
] | Deser et al. proposed a combination of the Einstein and Landau-Lifshitz pseudotensors such that the second derivatives in vacuum are proportional to the Bel-Robinson tensor. Stimulated by their work, the present paper discuss the gravitational energy-momentum expression which has the same desirable Bel-Robinson tensor ... |
gr-qc/9405067 | Melnikov Vitaly Nikolaevich | Vladimir D. Ivashchuk and Vitaly N. Melnikov | Multitemporal generalization of the Tangherlini solution | 14 pages. RGA-CSVR-005/94 | Class.Quant.Grav.11:1793-1806,1994 | 10.1088/0264-9381/11/7/016 | null | gr-qc | null | The n-time generalization of the Tangherlini solution [1] is considered. The
equations of geodesics for the metric are integrated. For $n = 2$ it is shown
that the naked singularity is absent only for two sets of parameters,
corresponding to the trivial extensions of the Tangherlini solution. The motion
of a relativi... | [
{
"created": "Thu, 26 May 1994 21:22:11 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Ivashchuk",
"Vladimir D.",
""
],
[
"Melnikov",
"Vitaly N.",
""
]
] | The n-time generalization of the Tangherlini solution [1] is considered. The equations of geodesics for the metric are integrated. For $n = 2$ it is shown that the naked singularity is absent only for two sets of parameters, corresponding to the trivial extensions of the Tangherlini solution. The motion of a relativist... |
1602.07197 | Yeinzon Rodriguez Garcia Prof. | Carlos M. Nieto (1,2), Yeinzon Rodriguez (2,3,4) ((1) Scuola
Internazionale Superiore di Studi Avanzati, (2) The Abdus Salam International
Centre for Theoretical Physics, (3) Universidad Antonio Narino, (4)
Universidad Industrial de Santander) | Massive Gauge-flation | LaTeX file in ws-mpla style, 15 pages, 18 figures. v2: several
miscellaneous changes. Some numerical problems with the plots were detected
and solved but the conclusions are unchanged. Version accepted for
publication in Modern Physics Letters A | Mod.Phys.Lett.A31:1640005,2016 | 10.1142/S0217732316400058 | PI/UAN-2016-592FT | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gauge-flation model at zeroth order in cosmological perturbation theory
offers an interesting scenario for realizing inflation within a particle
physics context, allowing us to investigate interesting possible connections
between inflation and the subsequent evolution of the Universe. Difficulties,
however, arise at ... | [
{
"created": "Fri, 19 Feb 2016 15:38:03 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jun 2016 14:42:30 GMT",
"version": "v2"
}
] | 2016-07-08 | [
[
"Nieto",
"Carlos M.",
""
],
[
"Rodriguez",
"Yeinzon",
""
]
] | Gauge-flation model at zeroth order in cosmological perturbation theory offers an interesting scenario for realizing inflation within a particle physics context, allowing us to investigate interesting possible connections between inflation and the subsequent evolution of the Universe. Difficulties, however, arise at th... |
1211.2968 | Kazuharu Bamba | Kazuharu Bamba, Jaume de Haro and Sergei D. Odintsov | Future singularities and Teleparallelism in Loop Quantum Cosmology | 23 pages, no figure, version accepted for publication in JCAP | null | 10.1088/1475-7516/2013/02/008 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate how holonomy corrections in loop quantum cosmology (LQC)
prevent the Big Rip singularity by introducing a quadratic modification in
terms of the energy density $\rho$ in the Friedmann equation in the
Friedmann-Lema\^{i}tre-Robertson-Walker (FLRW) space-time in a consistent and
useful way. In addition, ... | [
{
"created": "Tue, 13 Nov 2012 12:32:30 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Jan 2013 03:19:49 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Bamba",
"Kazuharu",
""
],
[
"de Haro",
"Jaume",
""
],
[
"Odintsov",
"Sergei D.",
""
]
] | We demonstrate how holonomy corrections in loop quantum cosmology (LQC) prevent the Big Rip singularity by introducing a quadratic modification in terms of the energy density $\rho$ in the Friedmann equation in the Friedmann-Lema\^{i}tre-Robertson-Walker (FLRW) space-time in a consistent and useful way. In addition, we... |
gr-qc/9811006 | Vladimir Mashkevich | Vladimir S. Mashkevich (Institute of Physics, Kiev) | Classical and Quantum Fields in Curved Spacetime: Canonical Theory
versus Conventional Construction | 17 pages, no figures, LATEX 2.09 | null | null | null | gr-qc | null | We argue that the conventional construction for quantum fields in curved
spacetime has a grave drawback: It involves an uncountable set of physical
field systems which are nonequivalent with respect to the Bogolubov
transformations, and there is, in general, no canonical way for choosing a
single system. Thus the con... | [
{
"created": "Tue, 3 Nov 1998 04:23:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mashkevich",
"Vladimir S.",
"",
"Institute of Physics, Kiev"
]
] | We argue that the conventional construction for quantum fields in curved spacetime has a grave drawback: It involves an uncountable set of physical field systems which are nonequivalent with respect to the Bogolubov transformations, and there is, in general, no canonical way for choosing a single system. Thus the const... |
gr-qc/9712019 | Sean Carroll | Sean M. Carroll | Lecture Notes on General Relativity | 238 pages, numerous figures. Individual chapters, and potentially
updated versions, can be found at http://itp.ucsb.edu/~carroll/notes/ | null | null | NSF-ITP/97-147 | gr-qc astro-ph hep-th | null | These notes represent approximately one semester's worth of lectures on
introductory general relativity for beginning graduate students in physics.
Topics include manifolds, Riemannian geometry, Einstein's equations, and three
applications: gravitational radiation, black holes, and cosmology.
| [
{
"created": "Wed, 3 Dec 1997 02:39:44 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Carroll",
"Sean M.",
""
]
] | These notes represent approximately one semester's worth of lectures on introductory general relativity for beginning graduate students in physics. Topics include manifolds, Riemannian geometry, Einstein's equations, and three applications: gravitational radiation, black holes, and cosmology. |
gr-qc/0312099 | Jian Qi Shen | Jian Qi Shen | Dual curvature tensors and dynamics of gravitomagnetic matter | 20 pages, Latex (There are some minor revisions made to the published
paper) | Annalen Phys. 13 (2004) 532-553 | 10.1002/andp.200410093 | null | gr-qc | null | Gravitomagnetic charge that can also be referred to as the {\it dual mass} or
{\it magnetic mass} is the topological charge in gravity theory. A
gravitomagnetic monopole at rest can produce a stationary gravitomagnetic
field. Due to the topological nature of gravitomagnetic charge, the metric of
spacetime where the g... | [
{
"created": "Mon, 22 Dec 2003 14:01:32 GMT",
"version": "v1"
},
{
"created": "Sun, 22 Feb 2004 07:27:57 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Mar 2004 14:36:47 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Shen",
"Jian Qi",
""
]
] | Gravitomagnetic charge that can also be referred to as the {\it dual mass} or {\it magnetic mass} is the topological charge in gravity theory. A gravitomagnetic monopole at rest can produce a stationary gravitomagnetic field. Due to the topological nature of gravitomagnetic charge, the metric of spacetime where the gra... |
1610.03909 | Mario A. Serna Jr | K. Arms and Mario Serna | Equivalence-principle Analog of the Gravitational Redshift | 11 pages and 4 figures. Presented at 4CS of APS October 2014 | null | null | null | gr-qc physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | What happens when two synchronized clocks on a rigid beam are both given the
exact same acceleration profile? Will they remain synchronized? What if we use
a rigid-rod Rindler acceleration profile? The special relativity prediction
surprises many people. This experimental setup is the special-relativity analog
of the... | [
{
"created": "Thu, 13 Oct 2016 01:55:25 GMT",
"version": "v1"
}
] | 2016-10-14 | [
[
"Arms",
"K.",
""
],
[
"Serna",
"Mario",
""
]
] | What happens when two synchronized clocks on a rigid beam are both given the exact same acceleration profile? Will they remain synchronized? What if we use a rigid-rod Rindler acceleration profile? The special relativity prediction surprises many people. This experimental setup is the special-relativity analog of the g... |
1807.06235 | Sergey Rubin | Yana Lyakhova, Arkady A. Popov, Sergey G. Rubin | Classical evolution of subspaces | 29 pages, 9 figures | Eur.Phys.J. C (2018) 78:764 | 10.1140/epjc/s10052-018-6251-9 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study evolution of manifolds after their creation at high energies.
Several kinds of gravitational Lagrangians with higher derivatives are
considered. It is shown analytically and confirmed numerically that an
asymptotic growth of the maximally symmetric manifolds depends strongly on
their dimensionality. A number... | [
{
"created": "Tue, 17 Jul 2018 06:06:00 GMT",
"version": "v1"
}
] | 2019-12-30 | [
[
"Lyakhova",
"Yana",
""
],
[
"Popov",
"Arkady A.",
""
],
[
"Rubin",
"Sergey G.",
""
]
] | We study evolution of manifolds after their creation at high energies. Several kinds of gravitational Lagrangians with higher derivatives are considered. It is shown analytically and confirmed numerically that an asymptotic growth of the maximally symmetric manifolds depends strongly on their dimensionality. A number o... |
1209.6328 | Melis Ulu | Melis Ulu Do\~gru and Derya Baykal | Homogeneous cosmologies in scalar tensor theory | 22 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, FRW-cosmologies with some matter groups such as
monopole-domain wall, monopole-Chaplygin gas and monopole-strange quark matter
in the scalar theory of gravitation based on Lyra geometry are investigated. We
expand two exact models as static case and time-depended case for each matter
groups in order to... | [
{
"created": "Thu, 27 Sep 2012 18:55:49 GMT",
"version": "v1"
}
] | 2012-09-28 | [
[
"Dogru",
"Melis Ulu",
""
],
[
"Baykal",
"Derya",
""
]
] | In this study, FRW-cosmologies with some matter groups such as monopole-domain wall, monopole-Chaplygin gas and monopole-strange quark matter in the scalar theory of gravitation based on Lyra geometry are investigated. We expand two exact models as static case and time-depended case for each matter groups in order to s... |
2405.20196 | Jan Niklas Reinhardt | Jan Niklas Reinhardt, Philipp Euringer, Olaf Hartwig, Gerald
Hechenblaikner, Gerhard Heinzel, Kohei Yamamoto | Time-delay interferometry with onboard optical delays | null | null | null | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | Time-delay interferometry (TDI) is a data processing technique for
space-based gravitational-wave detectors to create laser-noise-free
equal-optical-path-length interferometers virtually on the ground. It relies on
the interspacecraft signal propagation delays, which are delivered by
intersatellite ranging monitors. ... | [
{
"created": "Thu, 30 May 2024 16:00:01 GMT",
"version": "v1"
},
{
"created": "Fri, 31 May 2024 08:17:33 GMT",
"version": "v2"
}
] | 2024-06-03 | [
[
"Reinhardt",
"Jan Niklas",
""
],
[
"Euringer",
"Philipp",
""
],
[
"Hartwig",
"Olaf",
""
],
[
"Hechenblaikner",
"Gerald",
""
],
[
"Heinzel",
"Gerhard",
""
],
[
"Yamamoto",
"Kohei",
""
]
] | Time-delay interferometry (TDI) is a data processing technique for space-based gravitational-wave detectors to create laser-noise-free equal-optical-path-length interferometers virtually on the ground. It relies on the interspacecraft signal propagation delays, which are delivered by intersatellite ranging monitors. Al... |
0707.2083 | Joshua Faber | Zachariah B. Etienne, Joshua A. Faber, Yuk Tung Liu, Stuart L.
Shapiro, Thomas W. Baumgarte | Filling the holes: Evolving excised binary black hole initial data with
puncture techniques | 5 pages, 5 figures, accepted by PRD Rapid Communications, RevTeX | Phys.Rev.D76:101503,2007 | 10.1103/PhysRevD.76.101503 | null | gr-qc astro-ph | null | We follow the inspiral and merger of equal-mass black holes (BHs) by the
moving puncture technique and demonstrate that both the exterior solution and
the asymptotic gravitational waveforms are unchanged when the initial interior
solution is replaced by constraint-violating ``junk'' initial data. We apply
this result... | [
{
"created": "Mon, 16 Jul 2007 13:45:54 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Sep 2007 19:15:37 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Etienne",
"Zachariah B.",
""
],
[
"Faber",
"Joshua A.",
""
],
[
"Liu",
"Yuk Tung",
""
],
[
"Shapiro",
"Stuart L.",
""
],
[
"Baumgarte",
"Thomas W.",
""
]
] | We follow the inspiral and merger of equal-mass black holes (BHs) by the moving puncture technique and demonstrate that both the exterior solution and the asymptotic gravitational waveforms are unchanged when the initial interior solution is replaced by constraint-violating ``junk'' initial data. We apply this result t... |
2401.03184 | Mirzabek Alloqulov | Mirzabek Alloqulov, Sanjar Shaymatov, Bobomurat Ahmedov and Abdul
Jawad | Radiation properties of the accretion disk around a black hole in
Einstein-Maxwell-scalar theory | null | Chin. Phys. C 48, 025101 (2024) | 10.1088/1674-1137/ad137f | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | In this study, we explore the properties of a non-rotating black hole in the
Einstein-Maxwell-scalar (EMS) theory and investigate the luminosity of the
accretion disk surrounding it. We determine all the orbital parameters of
particles in the accretion disk, including the radius of the innermost stable
circular orbit... | [
{
"created": "Sat, 6 Jan 2024 10:08:47 GMT",
"version": "v1"
}
] | 2024-01-09 | [
[
"Alloqulov",
"Mirzabek",
""
],
[
"Shaymatov",
"Sanjar",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Jawad",
"Abdul",
""
]
] | In this study, we explore the properties of a non-rotating black hole in the Einstein-Maxwell-scalar (EMS) theory and investigate the luminosity of the accretion disk surrounding it. We determine all the orbital parameters of particles in the accretion disk, including the radius of the innermost stable circular orbit (... |
gr-qc/9505002 | Paulo Rodrigues Lima Vargas Moniz | P.V. Moniz | Back to Basics?... or How can supersymmetry be used in simple quantum
cosmological model | 6 pages; Communication presented at the First Mexican School in
Gravitation and Mathematical Physics, Guanajuato, Mexico, December 12-16,
1994; TeX macro for table at the end of file | null | null | DAMTP R95/20 | gr-qc | null | The general theory of N=1 supergravity with supermatter is applied to a
Bianchi type IX diagonal model. The supermatter is constituted by a complex
scalar field and its spin-$1\over 2$ fermionic partners. The Lorentz invariant
Ansatz for the wave function of the universe, $\Psi$, is taken to be as simple
as possible ... | [
{
"created": "Tue, 2 May 1995 10:25:53 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Moniz",
"P. V.",
""
]
] | The general theory of N=1 supergravity with supermatter is applied to a Bianchi type IX diagonal model. The supermatter is constituted by a complex scalar field and its spin-$1\over 2$ fermionic partners. The Lorentz invariant Ansatz for the wave function of the universe, $\Psi$, is taken to be as simple as possible in... |
0909.5391 | Lorenzo Sindoni | Lorenzo Sindoni, Florian Girelli and Stefano Liberati | Emergent gravitational dynamics in Bose-Einstein condensates | 9 pages. To appear in the Proceedings of the XXV Max Born Symposium,
"The Planck Scale", Wroclaw, Poland, July 2009 | AIP Conf. Proc. 1196 (2009) 258-265 | 10.1063/1.3284392 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a toy model for an emergent non-relativistic gravitational theory.
Within a certain class of Bose-Einstein condensates, it is possible to show
that, in a suitable regime, a modified version of non-relativistic Newtonian
gravity does effectively describes the low energy dynamics of the coupled
system conden... | [
{
"created": "Tue, 29 Sep 2009 17:22:07 GMT",
"version": "v1"
}
] | 2010-02-08 | [
[
"Sindoni",
"Lorenzo",
""
],
[
"Girelli",
"Florian",
""
],
[
"Liberati",
"Stefano",
""
]
] | We discuss a toy model for an emergent non-relativistic gravitational theory. Within a certain class of Bose-Einstein condensates, it is possible to show that, in a suitable regime, a modified version of non-relativistic Newtonian gravity does effectively describes the low energy dynamics of the coupled system condensa... |
1703.07396 | Jorge Pullin | Abhay Ashtekar and Jorge Pullin | The Overview Chapter in Loop Quantum Gravity: The First 30 Years | Chapter of a book published by World Scientific. More info at
http://www.lqg30.com | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is the introductory Chapter in the monograph Loop Quantum Gravity: The
First 30 Years, edited by the authors, that was just published in the series
"100 Years of General Relativity. The 8 invited Chapters that follow provide
fresh perspectives on the current status of the field from some of the younger
and most ... | [
{
"created": "Tue, 21 Mar 2017 19:22:15 GMT",
"version": "v1"
}
] | 2017-03-23 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Pullin",
"Jorge",
""
]
] | This is the introductory Chapter in the monograph Loop Quantum Gravity: The First 30 Years, edited by the authors, that was just published in the series "100 Years of General Relativity. The 8 invited Chapters that follow provide fresh perspectives on the current status of the field from some of the younger and most ac... |
1510.05720 | Saulo Pereira H | A. Pinho S. S., S. H. Pereira and E. L. Mendon\c{c}a | New cosmological solutions in massive gravity theory | 17 pages, text revised | Rev. Mex. Astron. Astrofis. 53, 17 (2017) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we present some new cosmological solutions in massive gravity
theory. Some homogeneous and isotropic solutions correctly describe accelerated
evolutions for the universe. The study was realized considering a specific form
to the fiducial metric and found different functions and constant parameters of
th... | [
{
"created": "Mon, 19 Oct 2015 23:33:20 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Jun 2017 13:59:13 GMT",
"version": "v2"
}
] | 2017-07-03 | [
[
"S.",
"A. Pinho S.",
""
],
[
"Pereira",
"S. H.",
""
],
[
"Mendonça",
"E. L.",
""
]
] | In this paper we present some new cosmological solutions in massive gravity theory. Some homogeneous and isotropic solutions correctly describe accelerated evolutions for the universe. The study was realized considering a specific form to the fiducial metric and found different functions and constant parameters of the ... |
1508.05479 | Vahid Kamali | Vahid Kamali, Mohammad Reza Setare | Tachyon-Warm Intermediate and Logamediate Inflation in the Brane-World
Model in the Light of Planck Data | arXiv admin note: substantial text overlap with arXiv:1302.0493,
arXiv:1408.6516, arXiv:1407.2604, arXiv:1312.2832 | null | 10.1155/2016/9682398 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Tachyon inflationary universe model on the brane in the context of warm
inflation is studied. In slow-roll approximation and in longitudinal gauge, we
find the primoradial perturbation spectrums for this scenario. We also present
the general expressions of the tensor-scalar ratio, scalar spectral index and
its runnin... | [
{
"created": "Sat, 22 Aug 2015 08:39:19 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Sep 2016 07:20:19 GMT",
"version": "v2"
}
] | 2016-09-20 | [
[
"Kamali",
"Vahid",
""
],
[
"Setare",
"Mohammad Reza",
""
]
] | Tachyon inflationary universe model on the brane in the context of warm inflation is studied. In slow-roll approximation and in longitudinal gauge, we find the primoradial perturbation spectrums for this scenario. We also present the general expressions of the tensor-scalar ratio, scalar spectral index and its running.... |
1605.02184 | B. S. Ratanpal | B. S. Ratanpal and D. M. Pandya and R. Sharma and S. Das | Charged compact stellar model in Finch-Skea spacetime | 14 pages, 9 figures | null | 10.1007/s10509-017-3059-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper a compact charged stellar model in the Finch and Skea
background spacetime [{\it Class. Quantum Gravity} {\bf6}, 467 (1989)] is
presented. The model has been developed by assuming a particular charge
distribution within the stellar interior. The model is well behaved and can
describe a large class of co... | [
{
"created": "Sat, 7 May 2016 12:33:43 GMT",
"version": "v1"
}
] | 2017-03-29 | [
[
"Ratanpal",
"B. S.",
""
],
[
"Pandya",
"D. M.",
""
],
[
"Sharma",
"R.",
""
],
[
"Das",
"S.",
""
]
] | In this paper a compact charged stellar model in the Finch and Skea background spacetime [{\it Class. Quantum Gravity} {\bf6}, 467 (1989)] is presented. The model has been developed by assuming a particular charge distribution within the stellar interior. The model is well behaved and can describe a large class of comp... |
0811.2474 | Peter Collas | Peter Collas and David Klein | A simple criterion for nonrotating reference frames | null | Gen.Rel.Grav.36:1493,2004 | 10.1023/B:GERG.0000022585.68675.38 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove a theorem that gives an easily verifiable necessary and sufficient
condition for a reference frame with fixed spacelike coordinates to be
nonrotating in the sense of Walker. Applications are discussed.
| [
{
"created": "Sat, 15 Nov 2008 10:01:29 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Collas",
"Peter",
""
],
[
"Klein",
"David",
""
]
] | We prove a theorem that gives an easily verifiable necessary and sufficient condition for a reference frame with fixed spacelike coordinates to be nonrotating in the sense of Walker. Applications are discussed. |
1604.02545 | Gerold Schellstede | Gerold O. Schellstede, Volker Perlick, Claus L\"ammerzahl | On causality in nonlinear vacuum electrodynamics of the Pleba\'nski
class | 21 pages | Ann. Phys. (Berlin) 528, 738 (2016) | 10.1002/andp.201600124 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the Pleba\'nski class of electrodynamical theories, i.e.,
theories of nonlinear vacuum electrodynamics that derive from a
Lorentz-invariant Lagrangian (or Hamiltonian). In any such theory the light
rays are the lightlike geodesics of two optical metrics that depend on the
electromagnetic background fie... | [
{
"created": "Sat, 9 Apr 2016 09:36:55 GMT",
"version": "v1"
}
] | 2016-11-03 | [
[
"Schellstede",
"Gerold O.",
""
],
[
"Perlick",
"Volker",
""
],
[
"Lämmerzahl",
"Claus",
""
]
] | We investigate the Pleba\'nski class of electrodynamical theories, i.e., theories of nonlinear vacuum electrodynamics that derive from a Lorentz-invariant Lagrangian (or Hamiltonian). In any such theory the light rays are the lightlike geodesics of two optical metrics that depend on the electromagnetic background field... |
1109.0902 | Gerard Clement | G\'erard Cl\'ement | Relativit\'e g\'en\'erale: solutions exactes stationnaires | Lectures given at the 3e Ecole de Physique Theorique de Jijel
(Algeria), Sept. 2009. 52 pages, in French | null | null | LAPTH-Conf-030/10 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After a brief summary of the foundations of general relativity, we will
concentrate on the stationary exact solutions of the Einstein and
Einstein-Maxwell equations. A number of these solutions can be interpreted as
black holes, corresponding to a special spacetime geometry. Then, we will show
that the reformulation ... | [
{
"created": "Mon, 5 Sep 2011 14:01:12 GMT",
"version": "v1"
}
] | 2011-09-06 | [
[
"Clément",
"Gérard",
""
]
] | After a brief summary of the foundations of general relativity, we will concentrate on the stationary exact solutions of the Einstein and Einstein-Maxwell equations. A number of these solutions can be interpreted as black holes, corresponding to a special spacetime geometry. Then, we will show that the reformulation of... |
2312.17678 | Lionel London | Lionel London | A radial scalar product for Kerr quasinormal modes | 28 pages, 5 figures | null | null | null | gr-qc math-ph math.MP math.SP | http://creativecommons.org/licenses/by/4.0/ | A scalar product for quasinormal mode solutions to Teukolsky's homogeneous
radial equation is presented. Evaluation of this scalar product can be
performed either by direct integration, or by evaluation of a confluent
hypergeometric functions. For direct integration, it is explicitly shown that
the quasinormal modes'... | [
{
"created": "Fri, 29 Dec 2023 16:48:54 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Jan 2024 18:49:12 GMT",
"version": "v2"
},
{
"created": "Sun, 7 Jan 2024 14:03:13 GMT",
"version": "v3"
}
] | 2024-01-09 | [
[
"London",
"Lionel",
""
]
] | A scalar product for quasinormal mode solutions to Teukolsky's homogeneous radial equation is presented. Evaluation of this scalar product can be performed either by direct integration, or by evaluation of a confluent hypergeometric functions. For direct integration, it is explicitly shown that the quasinormal modes' r... |
2108.03419 | Xiao Zhang | Chuxiao Liu, Xiao Zhang | Spherically symmetric Einstein-scalar-field equations for wave-like
decaying null infinity | 42 pages. The structure of the paper is re-arranged to improve the
presentation of the paper. The estimates for A1, A2, A3 and A4 (page 19) are
improved, which essentially provide the stronger conclusions including r=0 on
the local and global existences | Advances in Mathematics 409 (2022) 108642 | 10.1016/j.aim.2022.108642 | null | gr-qc math.AP math.DG | http://creativecommons.org/publicdomain/zero/1.0/ | We show that the spherically symmetric Einstein-scalar-field equations for
wave-like decaying initial data at null infinity have unique local solutions
and unique global solutions for small initial data. We also generalize
Christodoulou's global generalized solutions to the wave-like decaying initial
data. We emphasi... | [
{
"created": "Sat, 7 Aug 2021 10:38:38 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Sep 2022 13:25:58 GMT",
"version": "v2"
}
] | 2022-09-05 | [
[
"Liu",
"Chuxiao",
""
],
[
"Zhang",
"Xiao",
""
]
] | We show that the spherically symmetric Einstein-scalar-field equations for wave-like decaying initial data at null infinity have unique local solutions and unique global solutions for small initial data. We also generalize Christodoulou's global generalized solutions to the wave-like decaying initial data. We emphasize... |
gr-qc/0702059 | Zhaoyan Wu | Zhaoyan Wu | No-Go Theorem for Energy-Momentum Conservation in Curved Spacetime | 15 pages, 0 figure | null | null | null | gr-qc | null | It is pointed out that in curved spacetime, one cannot define the sum of
energy-momemtum 4-vector over a space-like hypersurface. The difficulty in
finding satisfactory gravitational energy-momentum complex stems from
misunderstanding of this question. The law of conservation of energy-momentum
holds valid only appro... | [
{
"created": "Sat, 10 Feb 2007 04:16:18 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wu",
"Zhaoyan",
""
]
] | It is pointed out that in curved spacetime, one cannot define the sum of energy-momemtum 4-vector over a space-like hypersurface. The difficulty in finding satisfactory gravitational energy-momentum complex stems from misunderstanding of this question. The law of conservation of energy-momentum holds valid only approxi... |
gr-qc/0501104 | Spiros Cotsakis | Spiros Cotsakis and Ifigeneia Klaoudatou | Modern Approaches to Cosmological Singularities | 10 pages, In: Proceedings of the 11th Greek Relativity Meeting | J.Phys.Conf.Ser. 8 (2005) 150 | 10.1088/1742-6596/8/1/019 | null | gr-qc | null | We review recent work and present new examples about the character of
singularities in globally and regularly hyperbolic, isotropic universes. These
include recent singular relativistic models, tachyonic and phantom universes as
well as inflationary cosmologies.
| [
{
"created": "Mon, 31 Jan 2005 14:46:23 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Cotsakis",
"Spiros",
""
],
[
"Klaoudatou",
"Ifigeneia",
""
]
] | We review recent work and present new examples about the character of singularities in globally and regularly hyperbolic, isotropic universes. These include recent singular relativistic models, tachyonic and phantom universes as well as inflationary cosmologies. |
2203.15838 | Dejan Gajic | Dejan Gajic | Late-time asymptotics for geometric wave equations with inverse-square
potentials | 75 pages, 1 figure | null | null | null | gr-qc math-ph math.AP math.DG math.MP | http://creativecommons.org/licenses/by/4.0/ | We introduce a new, physical-space-based method for deriving the precise
leading-order late-time behaviour of solutions to geometric wave equations on
asymptotically flat spacetime backgrounds and apply it to the setting of wave
equations with asymptotically inverse-square potentials on Schwarzschild black
holes. Thi... | [
{
"created": "Tue, 29 Mar 2022 18:12:09 GMT",
"version": "v1"
}
] | 2022-03-31 | [
[
"Gajic",
"Dejan",
""
]
] | We introduce a new, physical-space-based method for deriving the precise leading-order late-time behaviour of solutions to geometric wave equations on asymptotically flat spacetime backgrounds and apply it to the setting of wave equations with asymptotically inverse-square potentials on Schwarzschild black holes. This ... |
1812.08069 | Mahasweta Biswas | Mahasweta Biswas, Shounak Ghosh and Ujjal Debnath | Generalized Ghost Dark Energy in DGP Model | 9 pages, 13 figures | null | 10.1142/S0219887819501780 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In 2000, Giorgi Dvali, Gregory Gabadadze and Massimo Porrati (Dvali et al.
2000) was proposed a new braneworld model named as DGP model, having two
branches with $(\epsilon=+1)$ and $(\epsilon=-1)$. Former one $(~\epsilon=+1)$
known as the accelerating branch, i.e. accelerating phase of the universe can
be explained ... | [
{
"created": "Wed, 19 Dec 2018 16:37:55 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Biswas",
"Mahasweta",
""
],
[
"Ghosh",
"Shounak",
""
],
[
"Debnath",
"Ujjal",
""
]
] | In 2000, Giorgi Dvali, Gregory Gabadadze and Massimo Porrati (Dvali et al. 2000) was proposed a new braneworld model named as DGP model, having two branches with $(\epsilon=+1)$ and $(\epsilon=-1)$. Former one $(~\epsilon=+1)$ known as the accelerating branch, i.e. accelerating phase of the universe can be explained wi... |
gr-qc/9505051 | Alfio Bonanno | Alfio Bonanno | Coarse-Graining and Renormalization Group in the Einstein Universe | 18 pages, REVTex, two uuencoded figures. (to appear in Phys. Rev.
D15, July) Transmission errors have been corrected | Phys.Rev. D52 (1995) 969-980 | 10.1103/PhysRevD.52.969 | Alberta-Thy-10-95 | gr-qc hep-ph | null | The Kadanoff-Wilson renormalization group approach for a scalar
self-interacting field theor generally coupled with gravity is presented. An
average potential that monitors the fluctuations of the blocked field in
different scaling regimes is constructed in a nonflat background and explicitly
computed within the loop... | [
{
"created": "Tue, 30 May 1995 21:10:28 GMT",
"version": "v1"
},
{
"created": "Wed, 31 May 1995 19:26:39 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Bonanno",
"Alfio",
""
]
] | The Kadanoff-Wilson renormalization group approach for a scalar self-interacting field theor generally coupled with gravity is presented. An average potential that monitors the fluctuations of the blocked field in different scaling regimes is constructed in a nonflat background and explicitly computed within the loop-e... |
gr-qc/9610046 | Wolfgang Drechsler | W. Drechsler | Geometro-Stochastically Quantized Fields with Internal Spin Variables | 47 pages, Latex, using revtex | J.Math.Phys.38:5531-5558,1997 | 10.1063/1.532150 | MPI-PhT/96-52 | gr-qc | null | The use of internal variables for the description of relativistic particles
with arbitrary mass and spin in terms of scalar functions is reviewed and
applied to the stochastic phase space formulation of quantum mechanics.
Following Bacry and Kihlberg a four-dimensional internal spin space $\bar S$ is
chosen possessin... | [
{
"created": "Mon, 21 Oct 1996 16:15:12 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Drechsler",
"W.",
""
]
] | The use of internal variables for the description of relativistic particles with arbitrary mass and spin in terms of scalar functions is reviewed and applied to the stochastic phase space formulation of quantum mechanics. Following Bacry and Kihlberg a four-dimensional internal spin space $\bar S$ is chosen possessing ... |
2101.05290 | Shahar Hod | Shahar Hod | Introducing the inverse hoop conjecture for black holes | 7 pages | The European Physical Journal C (Letter) 80, 1148 (2020) | 10.1140/epjc/s10052-020-08732-y | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | It is conjectured that stationary black holes are characterized by the
inverse hoop relation ${\cal A}\leq {\cal C}^2/\pi$, where ${\cal A}$ and
${\cal C}$ are respectively the black-hole surface area and the circumference
length of the smallest ring that can engulf the black-hole horizon in every
direction. We expli... | [
{
"created": "Wed, 13 Jan 2021 19:00:03 GMT",
"version": "v1"
}
] | 2021-01-20 | [
[
"Hod",
"Shahar",
""
]
] | It is conjectured that stationary black holes are characterized by the inverse hoop relation ${\cal A}\leq {\cal C}^2/\pi$, where ${\cal A}$ and ${\cal C}$ are respectively the black-hole surface area and the circumference length of the smallest ring that can engulf the black-hole horizon in every direction. We explici... |
gr-qc/0205124 | Erika D'Ambrosio | R.G.Beausoleil, E. D'Ambrosio, W. Kells, J. Camp, E K.Gustafson,
M.M.Fejer | Model of Thermal Wavefront Distortion in Interferometric
Gravitational-Wave Detectors I: Thermal Focusing | 24 pages, 22 figures. Submitted to JOSA B | null | 10.1364/JOSAB.20.001247 | null | gr-qc | null | We develop a steady-state analytical and numerical model of the optical
response of power-recycled Fabry-Perot Michelson laser gravitational-wave
detectors to thermal focusing in optical substrates. We assume that the thermal
distortions are small enough that we can represent the unperturbed intracavity
field anywher... | [
{
"created": "Wed, 29 May 2002 19:13:31 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Beausoleil",
"R. G.",
""
],
[
"D'Ambrosio",
"E.",
""
],
[
"Kells",
"W.",
""
],
[
"Camp",
"J.",
""
],
[
"Gustafson",
"E K.",
""
],
[
"Fejer",
"M. M.",
""
]
] | We develop a steady-state analytical and numerical model of the optical response of power-recycled Fabry-Perot Michelson laser gravitational-wave detectors to thermal focusing in optical substrates. We assume that the thermal distortions are small enough that we can represent the unperturbed intracavity field anywhere ... |
2102.01105 | Jacopo Mazza | Jacopo Mazza, Edgardo Franzin, Stefano Liberati | A novel family of rotating black hole mimickers | 20+ pages, lots of pictures; minor fixes, references added | JCAP 04 (2021) 082 | 10.1088/1475-7516/2021/04/082 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent opening of gravitational wave astronomy has shifted the debate
about black hole mimickers from a purely theoretical arena to a
phenomenological one. In this respect, missing a definitive quantum gravity
theory, the possibility to have simple, meta-geometries describing in a compact
way alternative phenomen... | [
{
"created": "Mon, 1 Feb 2021 19:03:20 GMT",
"version": "v1"
},
{
"created": "Tue, 4 May 2021 19:56:17 GMT",
"version": "v2"
}
] | 2021-05-06 | [
[
"Mazza",
"Jacopo",
""
],
[
"Franzin",
"Edgardo",
""
],
[
"Liberati",
"Stefano",
""
]
] | The recent opening of gravitational wave astronomy has shifted the debate about black hole mimickers from a purely theoretical arena to a phenomenological one. In this respect, missing a definitive quantum gravity theory, the possibility to have simple, meta-geometries describing in a compact way alternative phenomenol... |
gr-qc/9805050 | Felix Finster | Felix Finster, Joel Smoller, and Shing-Tung Yau | Non-Existence of Time-Periodic Solutions of the Dirac Equation in a
Reissner-Nordstrom Black Hole Background | 24 pages, 2 figures (published version) | J.Math.Phys. 41 (2000) 2173-2194 | 10.1063/1.533234 | null | gr-qc math-ph math.MP | null | It is shown analytically that the Dirac equation has no normalizable,
time-periodic solutions in a Reissner-Nordstrom black hole background; in
particular, there are no static solutions of the Dirac equation in such a
background field. The physical interpretation is that Dirac particles can
either disappear into the ... | [
{
"created": "Wed, 13 May 1998 17:33:56 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Jan 2000 16:46:53 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Finster",
"Felix",
""
],
[
"Smoller",
"Joel",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | It is shown analytically that the Dirac equation has no normalizable, time-periodic solutions in a Reissner-Nordstrom black hole background; in particular, there are no static solutions of the Dirac equation in such a background field. The physical interpretation is that Dirac particles can either disappear into the bl... |
1102.5439 | Eugenio Bianchi | Eugenio Bianchi and Hal M. Haggard | Discreteness of the volume of space from Bohr-Sommerfeld quantization | 4 pages, 4 figures; v2, to appear in PRL | Phys.Rev.Lett.107:011301,2011 | 10.1103/PhysRevLett.107.011301 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A major challenge for any theory of quantum gravity is to quantize general
relativity while retaining some part of its geometrical character. We present
new evidence for the idea that this can be achieved by directly quantizing
space itself. We compute the Bohr-Sommerfeld volume spectrum of a tetrahedron
and show tha... | [
{
"created": "Sat, 26 Feb 2011 19:33:24 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jun 2011 14:37:34 GMT",
"version": "v2"
}
] | 2011-07-28 | [
[
"Bianchi",
"Eugenio",
""
],
[
"Haggard",
"Hal M.",
""
]
] | A major challenge for any theory of quantum gravity is to quantize general relativity while retaining some part of its geometrical character. We present new evidence for the idea that this can be achieved by directly quantizing space itself. We compute the Bohr-Sommerfeld volume spectrum of a tetrahedron and show that ... |
gr-qc/9611007 | Kerstin Kunze | John D. Barrow, Kerstin E. Kunze | Exact Inhomogeneous Cosmological Models | 9 pages, Latex | null | null | null | gr-qc | null | We present new exact inhomogeneous vacuum cosmological solutions of
Einstein's equations. They provide new information about the nature of general
cosmological solutions to Einstein's equations.
| [
{
"created": "Mon, 4 Nov 1996 19:36:55 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Barrow",
"John D.",
""
],
[
"Kunze",
"Kerstin E.",
""
]
] | We present new exact inhomogeneous vacuum cosmological solutions of Einstein's equations. They provide new information about the nature of general cosmological solutions to Einstein's equations. |
gr-qc/0208002 | Takashi Tamaki | Takashi Tamaki, Tomohiro Harada, Umpei Miyamoto, and Takashi Torii
(Wase da University) | Particle velocity in noncommutative space-time | 16 pages, corrected some mistakes | Phys.Rev. D66 (2002) 105003 | 10.1103/PhysRevD.66.105003 | null | gr-qc astro-ph hep-ph hep-th | null | We investigate a particle velocity in the $\kappa$-Minkowski space-time,
which is one of the realization of a noncommutative space-time. We emphasize
that arrival time analyses by high-energy $\gamma$-rays or neutrinos, which
have been considered as powerful tools to restrict the violation of Lorentz
invariance, are ... | [
{
"created": "Thu, 1 Aug 2002 07:49:43 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Sep 2002 09:06:08 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Tamaki",
"Takashi",
"",
"Wase da University"
],
[
"Harada",
"Tomohiro",
"",
"Wase da University"
],
[
"Miyamoto",
"Umpei",
"",
"Wase da University"
],
[
"Torii",
"Takashi",
"",
"Wase da University"
]
] | We investigate a particle velocity in the $\kappa$-Minkowski space-time, which is one of the realization of a noncommutative space-time. We emphasize that arrival time analyses by high-energy $\gamma$-rays or neutrinos, which have been considered as powerful tools to restrict the violation of Lorentz invariance, are no... |
gr-qc/0108010 | Scott M. Hitchcock | Scott M. Hitchcock | Is There a 'Conservation of Information Law' for the Universe? | 7 pages, no figures, minor corrections and reference added | null | null | null | gr-qc | null | What are the implications if the total 'information' in the universe is
conserved? Black holes might be 'logic gates' recomputing the 'lost
information' from incoming 'signals' from outside their event horizons into
outgoing 'signals' representing evaporative or radiative decay 'products' of
the reconfiguration proce... | [
{
"created": "Fri, 3 Aug 2001 04:45:59 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Aug 2001 00:53:55 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Hitchcock",
"Scott M.",
""
]
] | What are the implications if the total 'information' in the universe is conserved? Black holes might be 'logic gates' recomputing the 'lost information' from incoming 'signals' from outside their event horizons into outgoing 'signals' representing evaporative or radiative decay 'products' of the reconfiguration process... |
1910.03123 | Jorge Ananias Neto | Everton M. C. Abreu, Jorge Ananias Neto, Edesio M. Barboza Jr. and
Braulio B. Soares | Black holes quasinormal modes, Loop Quantum Gravity Immirzi parameter
and nonextensive statistics | 8 pages, 2 figures, version accepted for publication in PLB | null | 10.1016/j.physletb.2019.135011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is argued that, using the black hole area entropy law together with the
Boltzmann-Gibbs statistical mechanics and the quasinormal modes of the black
holes, it is possible to determine univocally the lowest possible value for the
spin $j$ in the context of the Loop Quantum Gravity theory which is
$j_{min}=1$. Conse... | [
{
"created": "Mon, 7 Oct 2019 22:58:48 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Abreu",
"Everton M. C.",
""
],
[
"Neto",
"Jorge Ananias",
""
],
[
"Barboza",
"Edesio M.",
"Jr."
],
[
"Soares",
"Braulio B.",
""
]
] | It is argued that, using the black hole area entropy law together with the Boltzmann-Gibbs statistical mechanics and the quasinormal modes of the black holes, it is possible to determine univocally the lowest possible value for the spin $j$ in the context of the Loop Quantum Gravity theory which is $j_{min}=1$. Consequ... |
2405.11576 | Zinnat Hassan | G. Mustafa, Zinnat Hassan, P.K. Sahoo | Deflection of light by wormholes and its shadow due to dark matter
within modified symmetric teleparallel gravity formalism | Comments are welcome | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We explore the possibility of traversable wormhole formation in the dark
matter halos in the context of $f(Q)$ gravity. We obtain the exact wormhole
solutions with anisotropic matter source based on the Bose-Einstein condensate,
Navarro-Frenk-White, and pseudo-isothermal matter density profiles. Notably, we
present a... | [
{
"created": "Sun, 19 May 2024 14:57:01 GMT",
"version": "v1"
}
] | 2024-05-21 | [
[
"Mustafa",
"G.",
""
],
[
"Hassan",
"Zinnat",
""
],
[
"Sahoo",
"P. K.",
""
]
] | We explore the possibility of traversable wormhole formation in the dark matter halos in the context of $f(Q)$ gravity. We obtain the exact wormhole solutions with anisotropic matter source based on the Bose-Einstein condensate, Navarro-Frenk-White, and pseudo-isothermal matter density profiles. Notably, we present a n... |
1309.3956 | Stefano Foffa | Stefano Foffa | Gravitating binaries at 5PN in the post-Minkowskian approximation | 11 pages, 1 figure; in v3: Section II extended and Appendix added,
final version published on PRD | Phys. Rev. D 89, 024019 (2014) | 10.1103/PhysRevD.89.024019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The energy of a compact binary system at the fifth post-Newtonian order is
explicitly computed in the post-Minkowskian approximation by means of the
Effective Field Theory approach. This result allows to determine, for the first
time beyond the test particle limit, one coefficient of the energy expression
for binary ... | [
{
"created": "Mon, 16 Sep 2013 13:45:52 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Sep 2013 12:43:16 GMT",
"version": "v2"
},
{
"created": "Fri, 24 Jan 2014 12:48:30 GMT",
"version": "v3"
}
] | 2014-01-27 | [
[
"Foffa",
"Stefano",
""
]
] | The energy of a compact binary system at the fifth post-Newtonian order is explicitly computed in the post-Minkowskian approximation by means of the Effective Field Theory approach. This result allows to determine, for the first time beyond the test particle limit, one coefficient of the energy expression for binary po... |
2003.01333 | Michael Good | Michael R.R. Good and Eric V. Linder | Schwarzschild Metric with Planck Length | 14 pages, 9 figures | New Journal of Physics 23, 043007 (2021) | 10.1088/1367-2630/abe506 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a modified Schwarzschild solution for a model of evaporation of a
black hole with information preservation. By drawing a direct analogy to the
quantum pure accelerating mirror (dynamical Casimir effect of a 1D horizon), we
derive a Schwarzschild metric with not only the usual Schwarzschild radius but
an ad... | [
{
"created": "Tue, 3 Mar 2020 05:02:45 GMT",
"version": "v1"
}
] | 2021-04-12 | [
[
"Good",
"Michael R. R.",
""
],
[
"Linder",
"Eric V.",
""
]
] | We present a modified Schwarzschild solution for a model of evaporation of a black hole with information preservation. By drawing a direct analogy to the quantum pure accelerating mirror (dynamical Casimir effect of a 1D horizon), we derive a Schwarzschild metric with not only the usual Schwarzschild radius but an addi... |
1410.7151 | Jie-Wen Chen | Jie-Wen Chen, Yang Zhang, Wen Zhao and Ming-Lei Tong | Initial Condition of Relic Gravitational Waves Constrained by LIGO S6
and Multiple Interferometers | 19 pages, 8 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relic gravitational wave (RGW) generated during the inflation depends on
the initial condition via the amplitude, the spectral index $n_t$ and the
running index $\alpha_t$. CMB observations so far have only constrained the
tensor-scalar ratio $r$, but not $n_t$ nor $\alpha_t$. Complementary to this,
the ground-ba... | [
{
"created": "Mon, 27 Oct 2014 08:34:20 GMT",
"version": "v1"
},
{
"created": "Thu, 21 May 2015 07:06:47 GMT",
"version": "v2"
}
] | 2015-05-22 | [
[
"Chen",
"Jie-Wen",
""
],
[
"Zhang",
"Yang",
""
],
[
"Zhao",
"Wen",
""
],
[
"Tong",
"Ming-Lei",
""
]
] | The relic gravitational wave (RGW) generated during the inflation depends on the initial condition via the amplitude, the spectral index $n_t$ and the running index $\alpha_t$. CMB observations so far have only constrained the tensor-scalar ratio $r$, but not $n_t$ nor $\alpha_t$. Complementary to this, the ground-base... |
0901.0480 | Nail Khusnutdinov | V.B. Bezerra and Nail R. Khusnutdinov | Self-force on a scalar particle in a class of wormhole spacetimes | 15 pages, 2 figures | Phys.Rev.D79:064012,2009 | 10.1103/PhysRevD.79.064012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the self-energy and the self-force for scalar massive and
massless particles at rest in the wormhole space-time. We develop a general
approach to obtain the self-force and apply it to the two specific profiles of
the wormhole throat, namely, with singular and with smooth curvature. We found
that the self-... | [
{
"created": "Mon, 5 Jan 2009 13:32:14 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Mar 2009 14:53:00 GMT",
"version": "v2"
},
{
"created": "Wed, 18 Mar 2009 04:41:55 GMT",
"version": "v3"
}
] | 2009-03-24 | [
[
"Bezerra",
"V. B.",
""
],
[
"Khusnutdinov",
"Nail R.",
""
]
] | We consider the self-energy and the self-force for scalar massive and massless particles at rest in the wormhole space-time. We develop a general approach to obtain the self-force and apply it to the two specific profiles of the wormhole throat, namely, with singular and with smooth curvature. We found that the self-fo... |
gr-qc/0008074 | Claus Laemmerzahl | Luc Blanchet, Sergei Kopeikin, and Gerhard Sch\"afer | Gravitational Radiation Theory and Light Propagation | 21 pages, LaTex, to appear in C. L\"ammerzahl, C.W.F. Everitt, F.W.
Hehl (eds.): ``Gyros, Clocks, and Interferometers: Testing Relativistic
Gravity in Space'', Springer-Verlag, Berlin 2000 | Lect.NotesPhys.562:141-166,2001 | 10.1007/3-540-40988-2_8 | null | gr-qc | null | The paper gives an introduction to the gravitational radiation theory of
isolated sources and to the propagation properties of light rays in radiative
gravitational fields. It presents a theoretical study of the generation,
propagation, back-reaction, and detection of gravitational waves from
astrophysical sources. A... | [
{
"created": "Wed, 30 Aug 2000 13:45:47 GMT",
"version": "v1"
}
] | 2016-12-07 | [
[
"Blanchet",
"Luc",
""
],
[
"Kopeikin",
"Sergei",
""
],
[
"Schäfer",
"Gerhard",
""
]
] | The paper gives an introduction to the gravitational radiation theory of isolated sources and to the propagation properties of light rays in radiative gravitational fields. It presents a theoretical study of the generation, propagation, back-reaction, and detection of gravitational waves from astrophysical sources. Aft... |
2010.02218 | Yijun Wang | Yijun Wang, Kris Pardo, Tzu-Ching Chang, Olivier Dor\'e | Gravitational Wave Detection with Photometric Surveys | 15 pages, 5 figures. Figures and some texts were modified without
significant changes to the conclusion. To be published in PRD | Phys. Rev. D 103, 084007 (2021) | 10.1103/PhysRevD.103.084007 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave (GW) detections have enriched our understanding of the
universe. To date, all single-source GW events were found by
interferometer-type detectors. We study a detection method using astrometric
solutions from photometric surveys and demonstrate that it offers a highly
flexible frequency range, uniqu... | [
{
"created": "Mon, 5 Oct 2020 18:00:01 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Mar 2021 08:08:16 GMT",
"version": "v2"
}
] | 2021-04-13 | [
[
"Wang",
"Yijun",
""
],
[
"Pardo",
"Kris",
""
],
[
"Chang",
"Tzu-Ching",
""
],
[
"Doré",
"Olivier",
""
]
] | Gravitational wave (GW) detections have enriched our understanding of the universe. To date, all single-source GW events were found by interferometer-type detectors. We study a detection method using astrometric solutions from photometric surveys and demonstrate that it offers a highly flexible frequency range, uniquel... |
gr-qc/9606069 | Friedrich Schein | F. Schein and P.C. Aichelburg (Institute for Theoretical Physics,
University of Vienna) | Traversable Wormholes in Geometries of Charged Shells | 9 pages, LaTeX, 1 figure | Phys.Rev.Lett. 77 (1996) 4130-4133 | 10.1103/PhysRevLett.77.4130 | UWThPh-1996-41 | gr-qc | null | We construct a static axisymmetric wormhole from the gravitational field of
two charged shells which are kept in equilibrium by their electromagnetic
repulsion. For large separations the exterior tends to the Majumdar-Papapetrou
spacetime of two charged particles. The interior of the wormhole is a
Reissner-Nordstr\"o... | [
{
"created": "Mon, 24 Jun 1996 16:46:03 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Schein",
"F.",
"",
"Institute for Theoretical Physics,\n University of Vienna"
],
[
"Aichelburg",
"P. C.",
"",
"Institute for Theoretical Physics,\n University of Vienna"
]
] | We construct a static axisymmetric wormhole from the gravitational field of two charged shells which are kept in equilibrium by their electromagnetic repulsion. For large separations the exterior tends to the Majumdar-Papapetrou spacetime of two charged particles. The interior of the wormhole is a Reissner-Nordstr\"om ... |
gr-qc/9504043 | Joshua N. Goldberg | J.N. Goldberg and C. Soteriou | Canonical General Relativity on a Null Surface with Coordinate and Gauge
Fixing | magnification set; pagination improved; 20 pages, plain tex | Class.Quant.Grav.12:2779-2798,1995 | 10.1088/0264-9381/12/11/010 | null | gr-qc | null | We use the canonical formalism developed together with David Robinson to st=
udy the Einstein equations on a null surface. Coordinate and gauge conditions =
are introduced to fix the triad and the coordinates on the null surface. Toget=
her with the previously found constraints, these form a sufficient number of
seco... | [
{
"created": "Tue, 25 Apr 1995 21:18:31 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Apr 1995 18:23:40 GMT",
"version": "v2"
}
] | 2010-11-01 | [
[
"Goldberg",
"J. N.",
""
],
[
"Soteriou",
"C.",
""
]
] | We use the canonical formalism developed together with David Robinson to st= udy the Einstein equations on a null surface. Coordinate and gauge conditions = are introduced to fix the triad and the coordinates on the null surface. Toget= her with the previously found constraints, these form a sufficient number of second... |
0812.2508 | Alain Ulacia Rey | D. Manreza Paret, A. Perez Martinez, A. Ulacia Rey, Roberto A. Sussman | Dynamics of a self-gravitating neutron source | 17 pages, 6 figures, JHEP style, published version | JCAP 1003:017,2010 | 10.1088/1475-7516/2010/03/017 | ICIMAF 2009-517 | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the dynamics of a self--gravitating magnetized neutron gas as a
source of a Bianchi I spacetime described by the Kasner metric. The set of
Einstein-Maxwell field equations can be expressed as a dynamical system in a
4-dimensional phase space. Numerical solutions of this system reveal the
emergence of a poi... | [
{
"created": "Sat, 13 Dec 2008 00:35:15 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Dec 2009 20:16:05 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Mar 2010 01:05:20 GMT",
"version": "v3"
}
] | 2010-03-17 | [
[
"Paret",
"D. Manreza",
""
],
[
"Martinez",
"A. Perez",
""
],
[
"Rey",
"A. Ulacia",
""
],
[
"Sussman",
"Roberto A.",
""
]
] | We examine the dynamics of a self--gravitating magnetized neutron gas as a source of a Bianchi I spacetime described by the Kasner metric. The set of Einstein-Maxwell field equations can be expressed as a dynamical system in a 4-dimensional phase space. Numerical solutions of this system reveal the emergence of a point... |
2204.03578 | Philip Semr\'en | Philip Semr\'en | On the Interaction Between Electromagnetic, Gravitational, and Plasma
Related Perturbations on LRS Class II Spacetimes | 30 pages, 4 figures | Universe 2022, 8(8), 406 | 10.3390/universe8080406 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate electromagnetic, gravitational, and plasma related
perturbations to first order on homogeneous and hypersurface orthogonal locally
rotationally symmetric (LRS) class II spacetimes. Due to the anisotropic nature
of the studied backgrounds, we are able to include a non-zero magnetic field to
zeroth order... | [
{
"created": "Thu, 7 Apr 2022 16:55:20 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Apr 2022 13:00:49 GMT",
"version": "v2"
}
] | 2022-08-10 | [
[
"Semrén",
"Philip",
""
]
] | We investigate electromagnetic, gravitational, and plasma related perturbations to first order on homogeneous and hypersurface orthogonal locally rotationally symmetric (LRS) class II spacetimes. Due to the anisotropic nature of the studied backgrounds, we are able to include a non-zero magnetic field to zeroth order. ... |
1311.1747 | Remo Garattini | Remo Garattini and Barun Majumder | Naked Singularities are not Singular in Distorted Gravity | Update to match published version. References added. Minor revision.
LaTeX 13 Pages. arXiv admin note: text overlap with arXiv:1210.7760 | Nucl.Phys. B884 (2014) 125-141 | 10.1016/j.nuclphysb.2014.04.014 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the Zero Point Energy (ZPE) induced by a naked singularity with
the help of a reformulation of the Wheeler-DeWitt equation. A variational
approach is used for the calculation with Gaussian Trial Wave Functionals. The
one loop contribution of the graviton to the ZPE is extracted keeping under
control the Ul... | [
{
"created": "Thu, 7 Nov 2013 17:07:50 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Aug 2014 11:18:04 GMT",
"version": "v2"
}
] | 2014-08-21 | [
[
"Garattini",
"Remo",
""
],
[
"Majumder",
"Barun",
""
]
] | We compute the Zero Point Energy (ZPE) induced by a naked singularity with the help of a reformulation of the Wheeler-DeWitt equation. A variational approach is used for the calculation with Gaussian Trial Wave Functionals. The one loop contribution of the graviton to the ZPE is extracted keeping under control the Ultr... |
1706.08843 | Jose Alberto Mart\'in-Ruiz | A. Mart\'in-Ruiz and L. F. Urrutia | Gravitational waves propagation in nondynamical Chern-Simons gravity | Accepted for publication in the International Journal of Modern
Physics D | null | 10.1142/S0218271817501486 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the propagation of gravitational waves in linearized
Chern-Simons (CS) modified gravity by considering two nondynamical models for
the coupling field $\theta$: (i) a domain wall and (ii) a surface layer of
$\theta$, motivated by their relevance in condensed matter physics. We
demonstrate that the metri... | [
{
"created": "Tue, 27 Jun 2017 16:03:46 GMT",
"version": "v1"
}
] | 2017-11-22 | [
[
"Martín-Ruiz",
"A.",
""
],
[
"Urrutia",
"L. F.",
""
]
] | We investigate the propagation of gravitational waves in linearized Chern-Simons (CS) modified gravity by considering two nondynamical models for the coupling field $\theta$: (i) a domain wall and (ii) a surface layer of $\theta$, motivated by their relevance in condensed matter physics. We demonstrate that the metric ... |
1001.3668 | Lee Smolin | Lee Smolin | Newtonian gravity in loop quantum gravity | 16 pages, small improvements to introduction and conclusion | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply a recent argument of Verlinde to loop quantum gravity, to conclude
that Newton's law of gravity emerges in an appropriate limit and setting. This
is possible because the relationship between area and entropy is realized in
loop quantum gravity when boundaries are imposed on a quantum spacetime.
| [
{
"created": "Wed, 20 Jan 2010 20:38:52 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Feb 2010 21:33:08 GMT",
"version": "v2"
}
] | 2010-02-22 | [
[
"Smolin",
"Lee",
""
]
] | We apply a recent argument of Verlinde to loop quantum gravity, to conclude that Newton's law of gravity emerges in an appropriate limit and setting. This is possible because the relationship between area and entropy is realized in loop quantum gravity when boundaries are imposed on a quantum spacetime. |
gr-qc/9802022 | null | Vladimir S. Mashkevich (Institute of Physics, Kiev) | Indeterministic Quantum Gravity and Cosmology X. Probability-Theoretic
Aspect: A Hidden Selector for Quantum Jumps, or How the Universe Plays the
Game of Chance | 5 pages, LATEX 2.09 | null | null | IP 3/98 | gr-qc quant-ph | null | This paper is a sequel to the series of papers [gr-qc/9409010, gr-qc/9505034,
gr-qc/9603022, gr-qc/9609035, gr-qc/9609046, gr-qc/9704033, gr-qc/9704038,
gr-qc/9708014, gr-qc/9802016]. The problem of the meaning of objective a priori
probability for individual random trials without repetition is considered. A
sequence... | [
{
"created": "Tue, 10 Feb 1998 12:08:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mashkevich",
"Vladimir S.",
"",
"Institute of Physics, Kiev"
]
] | This paper is a sequel to the series of papers [gr-qc/9409010, gr-qc/9505034, gr-qc/9603022, gr-qc/9609035, gr-qc/9609046, gr-qc/9704033, gr-qc/9704038, gr-qc/9708014, gr-qc/9802016]. The problem of the meaning of objective a priori probability for individual random trials without repetition is considered. A sequence o... |
gr-qc/9801029 | Carl H. Brans | Carl H. Brans | Absolute spacetime: the twentieth century ether | Contribution to Proceedings of Mexico Meeting on Gauge Theories of
Gravity in honor of Friedrich Hehl | Gen.Rel.Grav.31:597-607,1999 | 10.1023/A:1026632709502 | null | gr-qc | null | All gauge theories need ``something fixed'' even as ``something changes.''
Underlying the implementation of these ideas all major physical theories make
indispensable use of an elaborately designed spacetime model as the ``something
fixed,'' i.e., absolute. This model must provide at least the following
sequence of s... | [
{
"created": "Fri, 9 Jan 1998 21:23:57 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Brans",
"Carl H.",
""
]
] | All gauge theories need ``something fixed'' even as ``something changes.'' Underlying the implementation of these ideas all major physical theories make indispensable use of an elaborately designed spacetime model as the ``something fixed,'' i.e., absolute. This model must provide at least the following sequence of str... |
1309.3474 | Riccardo Sturani | Stefano Foffa and Riccardo Sturani | Effective field theory methods to model compact binaries | 37 pages, 22 figures | null | 10.1088/0264-9381/31/4/043001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this short review we present a self-contained exposition of the effective
field theory method approach to model the dynamics of gravitationally bound
compact binary systems within the post-Newtonian approximation to General
Relativity. Applications of this approach to the conservative sector, as well
as to the rad... | [
{
"created": "Fri, 13 Sep 2013 14:54:07 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Foffa",
"Stefano",
""
],
[
"Sturani",
"Riccardo",
""
]
] | In this short review we present a self-contained exposition of the effective field theory method approach to model the dynamics of gravitationally bound compact binary systems within the post-Newtonian approximation to General Relativity. Applications of this approach to the conservative sector, as well as to the radia... |
2110.11922 | Eleni-Alexandra Kontou | Eleni-Alexandra Kontou, Ben Freivogel, Dimitrios Krommydas | A singularity theorem for evaporating black holes | Contribution to the Proceedings of the 16th Marcel Grossmann Meeting
(MG16), 9 pages, 2 figures. arXiv admin note: text overlap with
arXiv:2012.11569 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The classical singularity theorems of General Relativity rely on energy
conditions that are easily violated by quantum fields. Here, we provide
motivation for an energy condition obeyed in semiclassical gravity: the smeared
null energy condition (SNEC), a proposed bound on the weighted average of the
null energy alon... | [
{
"created": "Fri, 22 Oct 2021 17:06:43 GMT",
"version": "v1"
}
] | 2021-10-25 | [
[
"Kontou",
"Eleni-Alexandra",
""
],
[
"Freivogel",
"Ben",
""
],
[
"Krommydas",
"Dimitrios",
""
]
] | The classical singularity theorems of General Relativity rely on energy conditions that are easily violated by quantum fields. Here, we provide motivation for an energy condition obeyed in semiclassical gravity: the smeared null energy condition (SNEC), a proposed bound on the weighted average of the null energy along ... |
1611.08468 | Dong-han Yeom | Pisin Chen, Yao-Chieh Hu, Dong-han Yeom | Fuzzy Euclidean wormholes in de Sitter space | 23 pages, 12 figures | JCAP 07 (2017) 001 | 10.1088/1475-7516/2017/07/001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate Euclidean wormholes in Einstein gravity with a massless scalar
field in de Sitter space. Euclidean wormholes are possible due to the analytic
continuation of the time as well as complexification of fields, where we need
to impose the classicality after the Wick-rotation to the Lorentzian
signatures. Fo... | [
{
"created": "Fri, 25 Nov 2016 14:26:57 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jul 2017 00:31:36 GMT",
"version": "v2"
}
] | 2017-07-05 | [
[
"Chen",
"Pisin",
""
],
[
"Hu",
"Yao-Chieh",
""
],
[
"Yeom",
"Dong-han",
""
]
] | We investigate Euclidean wormholes in Einstein gravity with a massless scalar field in de Sitter space. Euclidean wormholes are possible due to the analytic continuation of the time as well as complexification of fields, where we need to impose the classicality after the Wick-rotation to the Lorentzian signatures. For ... |
1110.6204 | Ikjyot Singh Kohli | Ikjyot Singh Kohli | Quantum Wavefunction for a Schwarzschild Black Hole | null | null | null | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A pseudo-Riemannian manifold contains an inherent Hamiltonian structure
within the symplectic manifold in the cotangent bundle corresponding to the
metric. Using this structure, it is possible to define a Hamiltonian, which can
be quantized, and substituted into The Schrodinger Equation. The wave function,
despite ha... | [
{
"created": "Thu, 27 Oct 2011 22:05:12 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Dec 2012 17:07:50 GMT",
"version": "v2"
}
] | 2012-12-07 | [
[
"Kohli",
"Ikjyot Singh",
""
]
] | A pseudo-Riemannian manifold contains an inherent Hamiltonian structure within the symplectic manifold in the cotangent bundle corresponding to the metric. Using this structure, it is possible to define a Hamiltonian, which can be quantized, and substituted into The Schrodinger Equation. The wave function, despite havi... |
0907.2188 | Maria Emilia Guimaraes | W. J. da Rocha (IF/UnB), A. L. Naves de Oliveira (UFV), M. E. X.
Guimaraes (IF/UFF) | Cosmic String Solution in a Born-Infeld Type Theory of Gravity | 6 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we derive an exact solution for the exterior metric of a local
cosmic string in an effective theory of gravity, the so-called NDL theory,
which is inspired in the Born-Infeld theory. The solution is given by a family
of parameters which presents quite different features from that of the General
Relativit... | [
{
"created": "Mon, 13 Jul 2009 15:18:19 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Sep 2012 20:32:48 GMT",
"version": "v2"
},
{
"created": "Thu, 27 Sep 2012 14:32:14 GMT",
"version": "v3"
}
] | 2012-09-28 | [
[
"da Rocha",
"W. J.",
"",
"IF/UnB"
],
[
"de Oliveira",
"A. L. Naves",
"",
"UFV"
],
[
"Guimaraes",
"M. E. X.",
"",
"IF/UFF"
]
] | In this work we derive an exact solution for the exterior metric of a local cosmic string in an effective theory of gravity, the so-called NDL theory, which is inspired in the Born-Infeld theory. The solution is given by a family of parameters which presents quite different features from that of the General Relativity ... |
0712.0817 | Jorge Pullin | Miguel Campiglia, Rodolfo Gambini, Jorge Pullin | Loop quantization of spherically symmetric midi-superspaces : the
interior problem | 12 Pages, to appear in Proceedings of the Third Mexican Meeting on
Mathematical and Experimental Physics, A. Macias, C. Laemmerzahl, A. Camacho,
editors, AIP conference series. Small corrections | AIPConf.Proc.977:52-63,2008 | 10.1063/1.2902798 | LSU-REL-120507 | gr-qc | null | We continue the study of spherically symmetric vacuum space-times in loop
quantum gravity by treating the interior of a black hole. We start from a
midi-superspace approach, but a simple gauge fixing leads to a Kantowski--Sachs
form for the variables. We show that one can solve the quantum theory exactly
in the (peri... | [
{
"created": "Wed, 5 Dec 2007 20:33:28 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Dec 2007 12:40:59 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Campiglia",
"Miguel",
""
],
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We continue the study of spherically symmetric vacuum space-times in loop quantum gravity by treating the interior of a black hole. We start from a midi-superspace approach, but a simple gauge fixing leads to a Kantowski--Sachs form for the variables. We show that one can solve the quantum theory exactly in the (period... |
gr-qc/9708012 | Jorma Louko | Jorma Louko, Bernard F. Whiting, and John L. Friedman | Hamiltonian spacetime dynamics with a spherical null-dust shell | 40 pages, REVTeX v3.1 with amsfonts and epsf, two eps figures. (Minor
typos corrected; references updated.) | Phys. Rev. D 57, 2279 (1998) | 10.1103/PhysRevD.57.2279 | PP98-05, UF-RAP-97-19, WISC-MILW-97-TH-13 | gr-qc | null | We consider the Hamiltonian dynamics of spherically symmetric Einstein
gravity with a thin null-dust shell, under boundary conditions that fix the
evolution of the spatial hypersurfaces at the two asymptotically flat
infinities of a Kruskal-like manifold. The constraints are eliminated via a
Kuchar-type canonical tra... | [
{
"created": "Wed, 6 Aug 1997 17:53:08 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Feb 1998 16:52:02 GMT",
"version": "v2"
}
] | 2016-08-25 | [
[
"Louko",
"Jorma",
""
],
[
"Whiting",
"Bernard F.",
""
],
[
"Friedman",
"John L.",
""
]
] | We consider the Hamiltonian dynamics of spherically symmetric Einstein gravity with a thin null-dust shell, under boundary conditions that fix the evolution of the spatial hypersurfaces at the two asymptotically flat infinities of a Kruskal-like manifold. The constraints are eliminated via a Kuchar-type canonical trans... |
gr-qc/0105116 | Terenzio Soldovieri | Terenzio Soldovieri & Angel G. Mu\~noz S | Obtention of a Gravitational Force from a Relativistic Solution to
Binet's Equation: The Schwarzschild's Case | 5 pages, LaTeX, 3 figures | Rev.Mex.Fis. 49 (2003) 271-275 | null | GIFT-01-0501 | gr-qc physics.ed-ph | null | Making use of the classical Binet's equation a general procedure to obtain
the gravitational force corresponding to an arbitrary 4-dimensional spacetime
is presented. This method provides, for general relativistic scenarios,
classics expressions that may help to visualize certain effects that Newton's
theory can not ... | [
{
"created": "Wed, 30 May 2001 18:15:21 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Dec 2003 03:33:56 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Soldovieri",
"Terenzio",
""
],
[
"S",
"Angel G. Muñoz",
""
]
] | Making use of the classical Binet's equation a general procedure to obtain the gravitational force corresponding to an arbitrary 4-dimensional spacetime is presented. This method provides, for general relativistic scenarios, classics expressions that may help to visualize certain effects that Newton's theory can not ex... |
1204.4786 | Maurice Kleman | Maurice Kleman | Some aspects of defect theory in spacetime | 22 pages, 2 figures. arXiv admin note: substantial text overlap with
arXiv:1108.2904 | null | null | null | gr-qc cond-mat.other | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The topological theory and the Volterra process are key tools for the
classification of defects in Condensed Mater Physics. We employ the same
methods to classify the 2D defects of a 4D maximally symmetric spacetime. These
\textit{cosmic forms}, which are continuous, fall into three classes: i)-
$m$-forms, akin to 3D... | [
{
"created": "Sat, 21 Apr 2012 07:57:37 GMT",
"version": "v1"
}
] | 2012-04-24 | [
[
"Kleman",
"Maurice",
""
]
] | The topological theory and the Volterra process are key tools for the classification of defects in Condensed Mater Physics. We employ the same methods to classify the 2D defects of a 4D maximally symmetric spacetime. These \textit{cosmic forms}, which are continuous, fall into three classes: i)- $m$-forms, akin to 3D s... |
gr-qc/0504066 | David P. Rideout | Madhavan Varadarajan and David Rideout | A general solution for classical sequential growth dynamics of Causal
Sets | 20 pages, 1 figure, LaTeX; response to referee comments | Phys.Rev. D73 (2006) 104021 | 10.1103/PhysRevD.73.104021 | null | gr-qc | null | A classical precursor to a full quantum dynamics for causal sets has been
forumlated in terms of a stochastic sequential growth process in which the
elements of the causal set arise in a sort of accretion process. The transition
probabilities of the Markov growth process satisfy certain physical
requirements of causa... | [
{
"created": "Fri, 15 Apr 2005 14:52:26 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Jun 2005 22:26:14 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Feb 2006 12:18:26 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Varadarajan",
"Madhavan",
""
],
[
"Rideout",
"David",
""
]
] | A classical precursor to a full quantum dynamics for causal sets has been forumlated in terms of a stochastic sequential growth process in which the elements of the causal set arise in a sort of accretion process. The transition probabilities of the Markov growth process satisfy certain physical requirements of causali... |
2005.02173 | Ujjal Debnath | Ujjal Debnath | Constructions of $f(R,G,\mathcal{T})$ Gravity from Some Expansions of
the Universe | 19 pages, 18 figures | null | 10.1142/S0217751X20502036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here we propose the extended modified gravity theory named as
$f(R,G,\mathcal{T})$ gravity where $R$ is the Ricci scalar, $G$ is the
Gauss-Bonnet invariant and $\mathcal{T}$ is the trace of the stress-energy
tensor. We derive the gravitational field equations in $f(R,G,\mathcal{T})$
gravity by taking least action pri... | [
{
"created": "Sat, 2 May 2020 16:26:26 GMT",
"version": "v1"
}
] | 2020-12-02 | [
[
"Debnath",
"Ujjal",
""
]
] | Here we propose the extended modified gravity theory named as $f(R,G,\mathcal{T})$ gravity where $R$ is the Ricci scalar, $G$ is the Gauss-Bonnet invariant and $\mathcal{T}$ is the trace of the stress-energy tensor. We derive the gravitational field equations in $f(R,G,\mathcal{T})$ gravity by taking least action princ... |
gr-qc/0608125 | Nora Breton | Luis A. Lopez, Nora Breton | Asymptotic singular behaviour of inhomogeneous cosmologies in
Einstein-Maxwell-dilaton-axion theory | 14 pages, 1 figure, submitted to General Relativity and Gravitation | Gen.Rel.Grav.39:153-166,2007 | 10.1007/s10714-006-0387-x | null | gr-qc | null | We present the study of exact inhomogeneous cosmological solutions to a
four-dimensional low energy limit of string theory containing non-minimal
interacting electromagnetic, dilaton and axion fields. We analyze
Einstein-Rosen solutions of Einstein-Maxwell-dilaton-axion equations and show,
by explicitly taken the asy... | [
{
"created": "Tue, 29 Aug 2006 14:35:02 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Lopez",
"Luis A.",
""
],
[
"Breton",
"Nora",
""
]
] | We present the study of exact inhomogeneous cosmological solutions to a four-dimensional low energy limit of string theory containing non-minimal interacting electromagnetic, dilaton and axion fields. We analyze Einstein-Rosen solutions of Einstein-Maxwell-dilaton-axion equations and show, by explicitly taken the asymp... |
2008.12135 | Yousef Bisabr | Yousef Bisabr (Farzan-nahad) | On Non-triviality of Units Transformations | To appear in Eur.J. Phys | Eur. J. Phys. 42, 015603 (2020) | 10.1088/1361-6404/ab9cc4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are some theoretical arguments about possible variations of fundamental
constants with cosmic time. We review the fact that all conversion factors
depend on these quantities and consider how their variations may affect
transformations of units. We deal with the relevance of the issue to the
cosmological constan... | [
{
"created": "Wed, 26 Aug 2020 05:31:41 GMT",
"version": "v1"
}
] | 2020-12-29 | [
[
"Bisabr",
"Yousef",
"",
"Farzan-nahad"
]
] | There are some theoretical arguments about possible variations of fundamental constants with cosmic time. We review the fact that all conversion factors depend on these quantities and consider how their variations may affect transformations of units. We deal with the relevance of the issue to the cosmological constant ... |
gr-qc/0612176 | Ying-Qiu Gu | Ying-Qiu Gu | Natural Coordinate System in Curved Space-time | 10 pages, no figures | null | null | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we establish a generally and globally valid coordinate system
in curved space-time with the simultaneous hypersurface orthogonal to the time
coordinate. The time coordinate can be preseted according to practical evolving
process and keep synchronous with the evolution of the realistic world. In this
coo... | [
{
"created": "Thu, 28 Dec 2006 07:00:31 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Sep 2017 13:23:53 GMT",
"version": "v2"
},
{
"created": "Sat, 28 Oct 2017 06:59:22 GMT",
"version": "v3"
}
] | 2017-12-27 | [
[
"Gu",
"Ying-Qiu",
""
]
] | In this paper we establish a generally and globally valid coordinate system in curved space-time with the simultaneous hypersurface orthogonal to the time coordinate. The time coordinate can be preseted according to practical evolving process and keep synchronous with the evolution of the realistic world. In this coord... |
gr-qc/0208057 | W. M. Stuckey | W.M. Stuckey | On a Pregeometric Origin for Spacetime Dimensionality and Metric
Structure | Four references added | null | null | null | gr-qc | null | Motivated by Wheeler's bottom up pregeometry, we introduce a pregeometric
approach that does not assume Wheeler's probability amplitudes for establishing
spacetime neighborhoods. Rather, a non-trivial metric is produced via the
concept of a uniformity base, which is generated with discrete topological
groups over som... | [
{
"created": "Mon, 19 Aug 2002 15:59:14 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Aug 2002 19:16:25 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Stuckey",
"W. M.",
""
]
] | Motivated by Wheeler's bottom up pregeometry, we introduce a pregeometric approach that does not assume Wheeler's probability amplitudes for establishing spacetime neighborhoods. Rather, a non-trivial metric is produced via the concept of a uniformity base, which is generated with discrete topological groups over some ... |
1502.07833 | Morteza Mohseni | Morteza Mohseni | The Raychaudhuri equation for spinning test particles | 9 pages, 3 eps figures | Gen. Relativ. Gravit. (2015) 47:24 | 10.1007/s10714-015-1868-6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain generalized Raychaudhuri equations for spinning test particles
corresponding to congruences of particle's world-lines, momentum, and spin.
These are physical examples of the Raychaudhuri equation for a non-normalized
vector, unit time-like vector, and unit space-like vector. We compute and
compare the evolu... | [
{
"created": "Fri, 27 Feb 2015 09:08:45 GMT",
"version": "v1"
}
] | 2015-03-02 | [
[
"Mohseni",
"Morteza",
""
]
] | We obtain generalized Raychaudhuri equations for spinning test particles corresponding to congruences of particle's world-lines, momentum, and spin. These are physical examples of the Raychaudhuri equation for a non-normalized vector, unit time-like vector, and unit space-like vector. We compute and compare the evoluti... |
2003.06783 | Xiao-Xiong Zeng | Xin-Yun Hu, Ke-Jian He, Xiao-Xiong Zeng, Jian-Pin Wu | Thermodynamics and weak cosmic censorship conjecture of an AdS black
hole with a monopole in the extended phase space | 8 pages, accepted by Chinese Physcis C | null | 10.1088/1674-1137/44/5/055103 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The first law of black hole thermodynamics in the extended phase space is
prevailing recently. However, the second law as well as the weak cosmic
censorship conjecture has not been investigated extensively. In this paper, we
investigate the laws of thermodynamics and the weak cosmic censorship
conjecture of an AdS bl... | [
{
"created": "Sun, 15 Mar 2020 09:54:21 GMT",
"version": "v1"
}
] | 2020-06-24 | [
[
"Hu",
"Xin-Yun",
""
],
[
"He",
"Ke-Jian",
""
],
[
"Zeng",
"Xiao-Xiong",
""
],
[
"Wu",
"Jian-Pin",
""
]
] | The first law of black hole thermodynamics in the extended phase space is prevailing recently. However, the second law as well as the weak cosmic censorship conjecture has not been investigated extensively. In this paper, we investigate the laws of thermodynamics and the weak cosmic censorship conjecture of an AdS blac... |
1204.2125 | Wei-Tou Ni | Gang Wang and Wei-Tou Ni | Numerical simulation of time delay interferometry for eLISA/NGO | 17 pages, 13 figures, 3 tables, minor changes in description to match
the accepted version of Classical and Quantum Gravity. arXiv admin note: text
overlap with arXiv:1102.4965 | Class. Quantum Grav. 30 (2013) 065011 (19pp) | 10.1088/0264-9381/30/6/065011 | null | gr-qc astro-ph.CO astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | eLISA/NGO is a new gravitational wave detection proposal with arm length of
10^6 km and one interferometer down-scaled from LISA. Just like LISA and
ASTROD-GW, in order to attain the requisite sensitivity for eLISA/NGO, laser
frequency noise must be suppressed to below the secondary noises such as the
optical path no... | [
{
"created": "Tue, 10 Apr 2012 12:35:20 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Jan 2013 00:59:37 GMT",
"version": "v2"
}
] | 2016-03-08 | [
[
"Wang",
"Gang",
""
],
[
"Ni",
"Wei-Tou",
""
]
] | eLISA/NGO is a new gravitational wave detection proposal with arm length of 10^6 km and one interferometer down-scaled from LISA. Just like LISA and ASTROD-GW, in order to attain the requisite sensitivity for eLISA/NGO, laser frequency noise must be suppressed to below the secondary noises such as the optical path nois... |
2305.01602 | Lorenzo Valbusa Dall'Armi | Florian Schulze, Lorenzo Valbusa Dall'Armi, Julien Lesgourgues, Angelo
Ricciardone, Nicola Bartolo, Daniele Bertacca, Christian Fidler, Sabino
Matarrese | GW_CLASS: Cosmological Gravitational Wave Background in the Cosmic
Linear Anisotropy Solving System | 64 pages, 16 figures. V2 matches the version published by JCAP.
GW_CLASS is publicly available on the class_public git repository as a branch
GW_CLASS, https://github.com/lesgourg/class_public/tree/GW_CLASS (For details
on installation and usage, follow the instructions in the README.) | null | null | ET-0151A-23, TTK-23-30 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The anisotropies of the Cosmological Gravitational Wave Background (CGWB)
retain information about the primordial mechanisms that source the
gravitational waves and about the geometry and the particle content of the
universe at early times. In this work, we discuss in detail the computation of
the angular power spect... | [
{
"created": "Tue, 2 May 2023 17:03:39 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Sep 2023 16:17:54 GMT",
"version": "v2"
}
] | 2023-09-12 | [
[
"Schulze",
"Florian",
""
],
[
"Dall'Armi",
"Lorenzo Valbusa",
""
],
[
"Lesgourgues",
"Julien",
""
],
[
"Ricciardone",
"Angelo",
""
],
[
"Bartolo",
"Nicola",
""
],
[
"Bertacca",
"Daniele",
""
],
[
"Fidler",
"Chr... | The anisotropies of the Cosmological Gravitational Wave Background (CGWB) retain information about the primordial mechanisms that source the gravitational waves and about the geometry and the particle content of the universe at early times. In this work, we discuss in detail the computation of the angular power spectra... |
gr-qc/9502039 | null | F. Englert | OPERATOR WEAK VALUES AND BLACK HOLE COMPLEMENTARITY | presented at the Oskar Klein Centenary Symposium (September 1994); 29
pages, phyzzx, no figures | null | null | ULB-TH 03/95 | gr-qc hep-th quant-ph | null | In conventional field theories, the emission of Hawking radiation in the
background of a collapsing star requires transplanckian energy fluctuations.
These fluctuations are encoded in the weak values of the energy-momentum
operator constructed from matrix elements between both -in and -out states. It
is argued that t... | [
{
"created": "Thu, 23 Feb 1995 13:43:34 GMT",
"version": "v1"
}
] | 2013-10-08 | [
[
"Englert",
"F.",
""
]
] | In conventional field theories, the emission of Hawking radiation in the background of a collapsing star requires transplanckian energy fluctuations. These fluctuations are encoded in the weak values of the energy-momentum operator constructed from matrix elements between both -in and -out states. It is argued that tam... |
1002.0617 | Leonardo Castaneda | Alejandro Guarnizo, Leonardo Castaneda, Juan M. Tejeiro | Boundary Term in Metric f(R) Gravity: Field Equations in the Metric
Formalism | 12 pages, title changes by referee recommendation. Accepted for
publication in General Relativity and Gravitation. Matches with the accepted
version | Gen. Rel. Grav. 42:2713-2728, 2010 | 10.1007/s10714-010-1012-6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main goal of this paper is to get in a straightforward form the field
equations in metric f(R) gravity, using elementary variational principles and
adding a boundary term in the action, instead of the usual treatment in an
equivalent scalar-tensor approach. We start with a brief review of the
Einstein-Hilbert act... | [
{
"created": "Wed, 3 Feb 2010 00:27:36 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Feb 2010 05:58:35 GMT",
"version": "v2"
},
{
"created": "Tue, 18 May 2010 20:41:08 GMT",
"version": "v3"
},
{
"created": "Wed, 2 Jun 2010 19:25:16 GMT",
"version": "v4"
}
] | 2011-09-30 | [
[
"Guarnizo",
"Alejandro",
""
],
[
"Castaneda",
"Leonardo",
""
],
[
"Tejeiro",
"Juan M.",
""
]
] | The main goal of this paper is to get in a straightforward form the field equations in metric f(R) gravity, using elementary variational principles and adding a boundary term in the action, instead of the usual treatment in an equivalent scalar-tensor approach. We start with a brief review of the Einstein-Hilbert actio... |
2306.17796 | Parthapratim Pradhan | Parthapratim Pradhan | Entropy Product Function and Central charges in NUT Geometry | Accepted in International Journal of Modern Physics A | International Journal of Modern Physics A, 2023 | 10.1142/S0217751X23500902 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We define an \emph{entropy product function}~(EPF) for
Taub-Newman-Unti-Tamburino~(TNUT) black hole~(BH) following the prescription
suggested by Wu et al.~\cite{wu} ~[PRD 100, 101501(R) (2019)]. The prescription
argues that a generic four-dimensional TNUT spacetime might be expressed in
terms of three or four differe... | [
{
"created": "Fri, 30 Jun 2023 16:53:21 GMT",
"version": "v1"
}
] | 2023-07-03 | [
[
"Pradhan",
"Parthapratim",
""
]
] | We define an \emph{entropy product function}~(EPF) for Taub-Newman-Unti-Tamburino~(TNUT) black hole~(BH) following the prescription suggested by Wu et al.~\cite{wu} ~[PRD 100, 101501(R) (2019)]. The prescription argues that a generic four-dimensional TNUT spacetime might be expressed in terms of three or four different... |
2401.04084 | Adam Zenon Kaczmarek | Adam Z. Kaczmarek | Mimetic-$f(Q)$ gravity: cosmic reconstruction and energy conditions | 17 pages, 3 figures, appendix | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this study, we present a novel approach to mimetic gravity incorporating a
non-zero nonmetricity tensor with vanishing torsion and curvature, establishing
a generalized mimetic-$f(Q)$ gravity framework. Using the Lagrange multiplier
method, we have obtained and discussed characteristics of the theory's field
equat... | [
{
"created": "Mon, 8 Jan 2024 18:38:50 GMT",
"version": "v1"
}
] | 2024-01-09 | [
[
"Kaczmarek",
"Adam Z.",
""
]
] | In this study, we present a novel approach to mimetic gravity incorporating a non-zero nonmetricity tensor with vanishing torsion and curvature, establishing a generalized mimetic-$f(Q)$ gravity framework. Using the Lagrange multiplier method, we have obtained and discussed characteristics of the theory's field equatio... |
gr-qc/0605065 | Demian Cho | Demian H.J. Cho and Madhavan Varadarajan | Functional evolution of quantum cylindrical waves | Replaced with published version | Class.Quant.Grav.23:6115-6140,2006 | 10.1088/0264-9381/23/22/003 | null | gr-qc | null | Kucha{\v{r}} showed that the quantum dynamics of (1 polarization) cylindrical
wave solutions to vacuum general relativity is determined by that of a free
axially-symmetric scalar field along arbitrary axially-symmetric foliations of
a fixed flat 2+1 dimensional spacetime. We investigate if such a dynamics can
be defi... | [
{
"created": "Thu, 11 May 2006 08:22:31 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Oct 2006 09:21:50 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Cho",
"Demian H. J.",
""
],
[
"Varadarajan",
"Madhavan",
""
]
] | Kucha{\v{r}} showed that the quantum dynamics of (1 polarization) cylindrical wave solutions to vacuum general relativity is determined by that of a free axially-symmetric scalar field along arbitrary axially-symmetric foliations of a fixed flat 2+1 dimensional spacetime. We investigate if such a dynamics can be define... |
0712.2154 | Katarzyna Ostasiewicz | A. Radosz, A. T. Augousti, K. Ostasiewicz | Doppler effect in Schwarzschild geometry | null | J.Phys.Conf.Ser.104:012008,2008 | 10.1088/1742-6596/104/1/012008 | null | gr-qc | null | The Doppler shift considered in general relativity involves mixed
contributions of distinct, gravitational and kinematical origins and for most
metrics or trajectories it takes a complex form. The expression for the Doppler
shift may simplify due to particular symmetries. In Schwarzschild spacetime it
factorizes in t... | [
{
"created": "Thu, 13 Dec 2007 13:48:09 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Radosz",
"A.",
""
],
[
"Augousti",
"A. T.",
""
],
[
"Ostasiewicz",
"K.",
""
]
] | The Doppler shift considered in general relativity involves mixed contributions of distinct, gravitational and kinematical origins and for most metrics or trajectories it takes a complex form. The expression for the Doppler shift may simplify due to particular symmetries. In Schwarzschild spacetime it factorizes in the... |
2301.05913 | Jose M. M. Senovilla | Jos\'e M M Senovilla | Beyond black holes: Universal properties of 'ultra-massive' spacetimes | 22 pages, 1 figure | null | null | YITP-23-01 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been long known that in spacetimes with a positive cosmological
constant $\Lambda >0$ the area of spatially stable marginally trapped surfaces
(MTSs) has a finite upper bound given by $4\pi/\Lambda$. In this paper I show
that any such spacetime containing spatially stable MTSs with area approaching
indefinitel... | [
{
"created": "Sat, 14 Jan 2023 13:02:38 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Mar 2023 19:56:31 GMT",
"version": "v2"
}
] | 2023-03-14 | [
[
"Senovilla",
"José M M",
""
]
] | It has been long known that in spacetimes with a positive cosmological constant $\Lambda >0$ the area of spatially stable marginally trapped surfaces (MTSs) has a finite upper bound given by $4\pi/\Lambda$. In this paper I show that any such spacetime containing spatially stable MTSs with area approaching indefinitely ... |
2205.13208 | Meng-Sen Ma | Li-Hua Wang, Meng-Sen Ma | Barrow black holes and the minimal length | 10 pages, 5 figures | Physics Letters B, 831(137181)2022 | 10.1016/j.physletb.2022.137181 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | Following Barrow's idea of fractal black hole horizon, we re-derive black
hole entropy of static spherically symmetric black holes. When a black hole
absorbs matter its horizon area will increase. Given the spherically fractal
structure, we conjecture that the minimal increase of the horizon area should
be the area o... | [
{
"created": "Thu, 26 May 2022 07:52:28 GMT",
"version": "v1"
}
] | 2022-05-27 | [
[
"Wang",
"Li-Hua",
""
],
[
"Ma",
"Meng-Sen",
""
]
] | Following Barrow's idea of fractal black hole horizon, we re-derive black hole entropy of static spherically symmetric black holes. When a black hole absorbs matter its horizon area will increase. Given the spherically fractal structure, we conjecture that the minimal increase of the horizon area should be the area of ... |
gr-qc/9705056 | John L. Friedman | Nikolaos Stergioulas and John L. Friedman | Nonaxisymmetric Neutral Modes in Rotating Relativistic Stars | 57 pages, 9 figures | Astrophys.J. 492 (1998) 301 | 10.1086/305030 | WISC-MILW-97-TH-12 | gr-qc astro-ph | null | We study nonaxisymmetric perturbations of rotating relativistic stars.
modeled as perfect-fluid equilibria. Instability to a mode with angular
dependence $\exp(im\phi)$ sets in when the frequency of the mode vanishes. The
locations of these zero-frequency modes along sequences of rotating stars are
computed in the fr... | [
{
"created": "Wed, 21 May 1997 15:01:10 GMT",
"version": "v1"
},
{
"created": "Thu, 22 May 1997 02:04:00 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Stergioulas",
"Nikolaos",
""
],
[
"Friedman",
"John L.",
""
]
] | We study nonaxisymmetric perturbations of rotating relativistic stars. modeled as perfect-fluid equilibria. Instability to a mode with angular dependence $\exp(im\phi)$ sets in when the frequency of the mode vanishes. The locations of these zero-frequency modes along sequences of rotating stars are computed in the fram... |
1509.03469 | James Lucietti | Carmen Li and James Lucietti | Transverse deformations of extreme horizons | 37 pages. v2: typos fixed, reference added, published version | Class.Quant.Grav. 33 (2016) no.7, 075015 | 10.1088/0264-9381/33/7/075015 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the inverse problem of determining all extreme black hole
solutions to the Einstein equations with a prescribed near-horizon geometry. We
investigate this problem by considering infinitesimal deformations of the
near-horizon geometry along transverse null geodesics. We show that, up to a
gauge transformat... | [
{
"created": "Fri, 11 Sep 2015 12:03:08 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Mar 2016 19:32:08 GMT",
"version": "v2"
}
] | 2016-03-22 | [
[
"Li",
"Carmen",
""
],
[
"Lucietti",
"James",
""
]
] | We consider the inverse problem of determining all extreme black hole solutions to the Einstein equations with a prescribed near-horizon geometry. We investigate this problem by considering infinitesimal deformations of the near-horizon geometry along transverse null geodesics. We show that, up to a gauge transformatio... |
gr-qc/0605023 | Dmitriy Palatnik M | Dmitriy M Palatnik | On Quantization of the Electrical Charge--Mass | 9 pages, 0 figures, typo removed | null | null | null | gr-qc | null | Suggested a non-linear, non-gauge invariant model of Maxwell equations, based
on the Kaluza-Klein theory. The spectrum of elementary charges and masses is
obtained.
| [
{
"created": "Wed, 3 May 2006 20:32:59 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Jun 2006 19:09:12 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Palatnik",
"Dmitriy M",
""
]
] | Suggested a non-linear, non-gauge invariant model of Maxwell equations, based on the Kaluza-Klein theory. The spectrum of elementary charges and masses is obtained. |
gr-qc/0607123 | Jose Socorro Garcia | S. R. Berbena, A. V. Berrocal, J. Socorro and Luis O. Pimentel | The Einstein-Hamilton-Jacobi equation: Searching the classical solution
for barotropic FRW | work presented in the IV Mexican workshop, 2004 Morelia Michoacan | null | null | null | gr-qc | null | The dynamical evolution of the scale factor of FRW cosmological model is
presented, when the equation of state of the material content assume the form
$\rm p=\gamma \rho$, $\rm \gamma=constant$, including the cosmological term. We
use the WKB approximation and the relation with the Einstein-Hamilton-Jacobi
equation t... | [
{
"created": "Thu, 27 Jul 2006 01:37:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Berbena",
"S. R.",
""
],
[
"Berrocal",
"A. V.",
""
],
[
"Socorro",
"J.",
""
],
[
"Pimentel",
"Luis O.",
""
]
] | The dynamical evolution of the scale factor of FRW cosmological model is presented, when the equation of state of the material content assume the form $\rm p=\gamma \rho$, $\rm \gamma=constant$, including the cosmological term. We use the WKB approximation and the relation with the Einstein-Hamilton-Jacobi equation to ... |
1208.3454 | Victor Shchigolev Konstantinovich | V. K. Shchigolev | Cosmic Evolution in Fractional Action Cosmology | 8 pages, 5 figures, fixed some typos | Discontinuity, Nonlinearity and Complexity, V. 2, No. 2, 115-123
(2013) | 10.5890/DNC.2013.04.002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For the fractional action cosmological model, derived earlier by the author
from the variational principle for a fractional action functional, the exact
solutions are obtained. The case of a quasi - vacuum state of matter that fills
the universe is considered. Moreover, on the basis of specific ansatz proposed
in thi... | [
{
"created": "Thu, 16 Aug 2012 19:42:09 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Aug 2012 18:39:02 GMT",
"version": "v2"
}
] | 2013-05-29 | [
[
"Shchigolev",
"V. K.",
""
]
] | For the fractional action cosmological model, derived earlier by the author from the variational principle for a fractional action functional, the exact solutions are obtained. The case of a quasi - vacuum state of matter that fills the universe is considered. Moreover, on the basis of specific ansatz proposed in this ... |
gr-qc/0010074 | Ion Cotaescu | Ion I. Cot\u{a}escu and Ion I. Cot\u{a}escu, jr | The radial supersymmetry of the (d+1)-dimensional relativistic rotating
oscillators | 11 pages LaTeX | null | null | null | gr-qc | null | We study the supersymmetry of the radial problems of the models of quantum
relativistic rotating oscillators in arbitrary dimensions, defined as
Klein-Gordon fields in backgrounds with deformed anti-de Sitter metrics. It is
pointed out that the shape invariance of the supersymmetric partner radial
potentials leads to... | [
{
"created": "Fri, 20 Oct 2000 16:47:07 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cotăescu",
"Ion I.",
""
],
[
"Cotăescu",
"Ion I.",
""
],
[
"jr",
"",
""
]
] | We study the supersymmetry of the radial problems of the models of quantum relativistic rotating oscillators in arbitrary dimensions, defined as Klein-Gordon fields in backgrounds with deformed anti-de Sitter metrics. It is pointed out that the shape invariance of the supersymmetric partner radial potentials leads to s... |
gr-qc/9709066 | Jemal Guven | Jemal Guven and Niall O Murchadha | Sufficient Conditions for Apparent Horizons in Spherically Symmetric
Initial Data | 16 pages, revtex, to appear in Phys. Rev. D | Phys.Rev. D56 (1997) 7658-7665 | 10.1103/PhysRevD.56.7658 | null | gr-qc | null | We establish sufficient conditions for the appearance of apparent horizons in
spherically symmetric initial data when spacetime is foliated extrinsically.
Let $M$ and $P$ be respectively the total material energy and the total
material current contained in some ball of radius $\ell$. Suppose that the
dominant energy ... | [
{
"created": "Wed, 24 Sep 1997 22:16:29 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Guven",
"Jemal",
""
],
[
"Murchadha",
"Niall O",
""
]
] | We establish sufficient conditions for the appearance of apparent horizons in spherically symmetric initial data when spacetime is foliated extrinsically. Let $M$ and $P$ be respectively the total material energy and the total material current contained in some ball of radius $\ell$. Suppose that the dominant energy co... |
gr-qc/9410046 | Martin Schoen | Martin Schoen | Pre-Galaxy Formation: A Non-Linear Analysis of the Evolution of
Cosmological Perturbations | 26 pages | Phys.Rev. D51 (1995) 4067-4078 | 10.1103/PhysRevD.51.4067 | null | gr-qc | null | A higher-order analysis of the evolution of cosmological perturbations in a
Friedman universe is given by using the PMF method. The essence of the PMF
approach is to choose a gauge where all fluctuations of the density, the
pressure, and the four-velocity vanish. In that gauge, even in higher orders,
the perturbation... | [
{
"created": "Mon, 31 Oct 1994 18:01:10 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Schoen",
"Martin",
""
]
] | A higher-order analysis of the evolution of cosmological perturbations in a Friedman universe is given by using the PMF method. The essence of the PMF approach is to choose a gauge where all fluctuations of the density, the pressure, and the four-velocity vanish. In that gauge, even in higher orders, the perturbation f... |
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