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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9812014 | Patrick R. Brady | Patrick R Brady and Teviet Creighton | Searching for periodic sources with LIGO. II: Hierarchical searches | 22 Pages, 13 Figures | Phys.Rev. D61 (2000) 082001 | 10.1103/PhysRevD.61.082001 | GRP-508, NSF-ITP-98-120 | gr-qc | null | The detection of quasi-periodic sources of gravitational waves requires the
accumulation of signal-to-noise over long observation times. If not removed,
Earth-motion induced Doppler modulations, and intrinsic variations of the
gravitational-wave frequency make the signals impossible to detect. These
effects can be co... | [
{
"created": "Fri, 4 Dec 1998 03:25:11 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Brady",
"Patrick R",
""
],
[
"Creighton",
"Teviet",
""
]
] | The detection of quasi-periodic sources of gravitational waves requires the accumulation of signal-to-noise over long observation times. If not removed, Earth-motion induced Doppler modulations, and intrinsic variations of the gravitational-wave frequency make the signals impossible to detect. These effects can be corr... |
0802.4274 | Martin Bojowald | Martin Bojowald and Reza Tavakol | Loop Quantum Cosmology: Effective theories and oscillating universes | 24 pages, 3 figures, Chapter contributed to: ``Beyond the Big Bang'',
Ed.: Ruediger Vaas (Springer Verlag, 2008) | null | null | IGPG-08/2-6 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Despite its great successes in accounting for the current observations, the
so called `standard' model of cosmology faces a number of fundamental
unresolved questions. Paramount among these are those relating to the nature of
the origin of the universe and its early evolution. Regarding the question of
origin, the ma... | [
{
"created": "Thu, 28 Feb 2008 20:13:31 GMT",
"version": "v1"
}
] | 2008-02-29 | [
[
"Bojowald",
"Martin",
""
],
[
"Tavakol",
"Reza",
""
]
] | Despite its great successes in accounting for the current observations, the so called `standard' model of cosmology faces a number of fundamental unresolved questions. Paramount among these are those relating to the nature of the origin of the universe and its early evolution. Regarding the question of origin, the main... |
1707.01508 | Mattia Manfredonia | Emmanuele Battista, Elisabetta Di Grezia, Mattia Manfredonia, Gennaro
Miele | Spin, torsion and violation of null energy condition in traversable
wormholes | 13 pages | Eur. Phys. J. Plus (2017) 132: 537 | 10.1140/epjp/i2017-11799-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The static spherically symmetric traversable wormholes are analysed in the
Einstein- Cartan theory of gravitation. In particular, we computed the torsion
tensor for matter fields with different spin S = 0; 1/2; 1; 3/2. Interestingly,
only for certain values of the spin the torsion contribution to Einstein-Cartan
fiel... | [
{
"created": "Wed, 5 Jul 2017 18:01:11 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Jan 2018 12:30:12 GMT",
"version": "v2"
}
] | 2018-01-12 | [
[
"Battista",
"Emmanuele",
""
],
[
"Di Grezia",
"Elisabetta",
""
],
[
"Manfredonia",
"Mattia",
""
],
[
"Miele",
"Gennaro",
""
]
] | The static spherically symmetric traversable wormholes are analysed in the Einstein- Cartan theory of gravitation. In particular, we computed the torsion tensor for matter fields with different spin S = 0; 1/2; 1; 3/2. Interestingly, only for certain values of the spin the torsion contribution to Einstein-Cartan field ... |
2102.05112 | Kun Meng | Kun Meng, Lianzhen Cao, Jiaqiang Zhao, Fuyong Qin, Tao Zhou, Meihua
Deng | Dyonic Born-Infeld black hole in four-dimensional Horndeski gravity | 13 pages, 2 figures. Phys.Lett.B 819 (2021) 136420 | null | 10.1016/j.physletb.2021.136420 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The action of four-dimensional Horndeski gravity coupled to Born-Infeld
electromagnetic fields is given via the Kaluza-Klein process. Dyonic black hole
solution of the theory is constructed. The metric is devoid of singularity at
the origin independent of the parameter selections, this property is different
from the ... | [
{
"created": "Tue, 9 Feb 2021 20:24:53 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Feb 2021 05:42:49 GMT",
"version": "v2"
},
{
"created": "Sat, 17 Apr 2021 17:09:08 GMT",
"version": "v3"
},
{
"created": "Sat, 12 Jun 2021 11:34:44 GMT",
"version": "v4"
}
] | 2021-06-15 | [
[
"Meng",
"Kun",
""
],
[
"Cao",
"Lianzhen",
""
],
[
"Zhao",
"Jiaqiang",
""
],
[
"Qin",
"Fuyong",
""
],
[
"Zhou",
"Tao",
""
],
[
"Deng",
"Meihua",
""
]
] | The action of four-dimensional Horndeski gravity coupled to Born-Infeld electromagnetic fields is given via the Kaluza-Klein process. Dyonic black hole solution of the theory is constructed. The metric is devoid of singularity at the origin independent of the parameter selections, this property is different from the on... |
gr-qc/0612075 | Valerio Faraoni | Valerio Faraoni and Shahn Nadeau (Bishop's University) | The (pseudo)issue of the conformal frame revisited | 29 pages, latex, to appear in Phys. Rev. D | Phys.Rev.D75:023501,2007 | 10.1103/PhysRevD.75.023501 | null | gr-qc astro-ph hep-th | null | The issue of the equivalence between Jordan and Einstein conformal frames in
scalar-tensor gravity is revisited, with emphasis on implementing running units
in the latter. The lack of affine parametrization for timelike worldlines and
the cosmological constant problem in the Einstein frame are clarified, and a
parado... | [
{
"created": "Tue, 12 Dec 2006 21:24:07 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Faraoni",
"Valerio",
"",
"Bishop's University"
],
[
"Nadeau",
"Shahn",
"",
"Bishop's University"
]
] | The issue of the equivalence between Jordan and Einstein conformal frames in scalar-tensor gravity is revisited, with emphasis on implementing running units in the latter. The lack of affine parametrization for timelike worldlines and the cosmological constant problem in the Einstein frame are clarified, and a paradox ... |
gr-qc/0304102 | Claus Kiefer | Claus Kiefer | Is there an information-loss problem for black holes? | 11 pages, to appear in the Proceedings of the conference DICE,
Piombino 2002, ed. by H.-T. Elze (Springer 2003), references and
clarifications added | null | 10.1007/978-3-540-40968-7_6 | null | gr-qc hep-th | null | Black holes emit thermal radiation (Hawking effect). If after black-hole
evaporation nothing else were left, an arbitrary initial state would evolve
into a thermal state (`information-loss problem'). Here it is argued that the
whole evolution is unitary and that the thermal nature of Hawking radiation
emerges solely ... | [
{
"created": "Tue, 29 Apr 2003 13:47:09 GMT",
"version": "v1"
},
{
"created": "Mon, 5 May 2003 08:18:59 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Kiefer",
"Claus",
""
]
] | Black holes emit thermal radiation (Hawking effect). If after black-hole evaporation nothing else were left, an arbitrary initial state would evolve into a thermal state (`information-loss problem'). Here it is argued that the whole evolution is unitary and that the thermal nature of Hawking radiation emerges solely th... |
gr-qc/0608121 | Yi Mao | Yi Mao (MIT), Max Tegmark (MIT), Alan Guth (MIT), Serkan Cabi (MIT) | Constraining Torsion with Gravity Probe B | "Director's cut" edition of accepted PRD version, including
additional explanatory material | Phys.Rev.D76:104029,2007 | 10.1103/PhysRevD.76.104029 | null | gr-qc astro-ph hep-th | null | It is well-entrenched folklore that torsion gravity theories predict
observationally negligible torsion in the solar system, since torsion (if it
exists) couples only to the intrinsic spin of elementary particles, not to
rotational angular momentum. We argue that this assumption has a logical
loophole which can and s... | [
{
"created": "Tue, 29 Aug 2006 19:50:38 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Aug 2006 23:55:18 GMT",
"version": "v2"
},
{
"created": "Tue, 9 Jan 2007 03:48:47 GMT",
"version": "v3"
},
{
"created": "Fri, 5 Oct 2007 14:41:25 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Mao",
"Yi",
"",
"MIT"
],
[
"Tegmark",
"Max",
"",
"MIT"
],
[
"Guth",
"Alan",
"",
"MIT"
],
[
"Cabi",
"Serkan",
"",
"MIT"
]
] | It is well-entrenched folklore that torsion gravity theories predict observationally negligible torsion in the solar system, since torsion (if it exists) couples only to the intrinsic spin of elementary particles, not to rotational angular momentum. We argue that this assumption has a logical loophole which can and sho... |
2402.15540 | Surojit Dalui | Surojit Dalui, Arpan Krishna Mitra, Deeshani Mitra and Subir Ghosh | Spinning Black Hole in a Fluid | Accepted in Physical Review D and this paper has overlap with our
earlier paper arXiv:2306.12201 [gr-qc] | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we propose a new Analogue Gravity example - a spinning (or
Kerr) Black Hole in an extended fluid model. The fluid model receives Berry
curvature contributions and applies to electron dynamics in Condensed Matter
lattice systems in the hydrodynamic limit. We construct the acoustic metric for
sonic fluct... | [
{
"created": "Fri, 23 Feb 2024 10:05:37 GMT",
"version": "v1"
}
] | 2024-02-27 | [
[
"Dalui",
"Surojit",
""
],
[
"Mitra",
"Arpan Krishna",
""
],
[
"Mitra",
"Deeshani",
""
],
[
"Ghosh",
"Subir",
""
]
] | In this paper, we propose a new Analogue Gravity example - a spinning (or Kerr) Black Hole in an extended fluid model. The fluid model receives Berry curvature contributions and applies to electron dynamics in Condensed Matter lattice systems in the hydrodynamic limit. We construct the acoustic metric for sonic fluctua... |
1107.2872 | Fabrizio De Marchi | Fabrizio De Marchi, Giuseppe Pucacco, Massimo Bassan | Optimizing the Earth-LISA "rendez-vous" | 18 pages, 16 figures. Submitted on CQG | Class. Quantum Grav. 29 (2012) 035009 | 10.1088/0264-9381/29/3/035009 | null | gr-qc nlin.CD | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a general survey of heliocentric LISA orbits, hoping it might help
in the exercise of rescoping the mission. We try to semi-analytically optimize
the orbital parameters in order to minimize the disturbances coming from the
Earth-LISA interaction. In a set of numerical simulations we include
nonautonomous p... | [
{
"created": "Thu, 14 Jul 2011 17:14:36 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"De Marchi",
"Fabrizio",
""
],
[
"Pucacco",
"Giuseppe",
""
],
[
"Bassan",
"Massimo",
""
]
] | We present a general survey of heliocentric LISA orbits, hoping it might help in the exercise of rescoping the mission. We try to semi-analytically optimize the orbital parameters in order to minimize the disturbances coming from the Earth-LISA interaction. In a set of numerical simulations we include nonautonomous per... |
2403.12447 | Omar Mustafa | Omar Mustafa | Bosonic KG-oscillators in Eddington-inspired Born-Infeld gravity:
Wu-Yang magnetic monopole and Ricci scalar curvature effects | 15 pages, 3 figures | null | null | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | We investigate the bosonic Klein-Gordon (KG) oscillators in a global monopole
(GM) spacetime in Eddington-inspired Born-Infeld (EiBI) gravity and a Wu-Yang
magnetic monopole (WYMM). We discuss the gravitational effects in the presence
of Ricci scalar curvature $R=R_{\upsilon }^{\upsilon }$. It is observed that
the pr... | [
{
"created": "Tue, 19 Mar 2024 05:16:13 GMT",
"version": "v1"
}
] | 2024-03-20 | [
[
"Mustafa",
"Omar",
""
]
] | We investigate the bosonic Klein-Gordon (KG) oscillators in a global monopole (GM) spacetime in Eddington-inspired Born-Infeld (EiBI) gravity and a Wu-Yang magnetic monopole (WYMM). We discuss the gravitational effects in the presence of Ricci scalar curvature $R=R_{\upsilon }^{\upsilon }$. It is observed that the pres... |
2311.16251 | Florian Atteneder | Florian Atteneder, Hannes R. R\"uter, Daniela Cors, Roxana Rosca-Mead,
David Hilditch, Bernd Br\"ugmann | Boson star head-on collisions with constraint-violating and
constraint-satisfying initial data | null | null | 10.1103/PhysRevD.109.044058 | Phys. Rev. D 109, 044058 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Simulations of binary collisions involving compact objects require initial
data that satisfy the constraint equations of general relativity. For binary
boson star simulations it is common practice to use a superposition of two
isolated star solutions to construct an approximate solution to the constraint
equations. S... | [
{
"created": "Mon, 27 Nov 2023 19:01:42 GMT",
"version": "v1"
}
] | 2024-03-05 | [
[
"Atteneder",
"Florian",
""
],
[
"Rüter",
"Hannes R.",
""
],
[
"Cors",
"Daniela",
""
],
[
"Rosca-Mead",
"Roxana",
""
],
[
"Hilditch",
"David",
""
],
[
"Brügmann",
"Bernd",
""
]
] | Simulations of binary collisions involving compact objects require initial data that satisfy the constraint equations of general relativity. For binary boson star simulations it is common practice to use a superposition of two isolated star solutions to construct an approximate solution to the constraint equations. Suc... |
gr-qc/0306098 | Yosef Zlochower | Yosef Zlochower, Roberto Gomez, Sascha Husa, Luis Lehner, Jeffrey
Winicour | Mode coupling in the nonlinear response of black holes | 17 pages, 20 figures, abstract and introduction re-written | Phys.Rev. D68 (2003) 084014 | 10.1103/PhysRevD.68.084014 | NSF-KITP-03-49, AEI-2003-053 | gr-qc | null | We study the properties of the outgoing gravitational wave produced when a
non-spinning black hole is excited by an ingoing gravitational wave.
Simulations using a numerical code for solving Einstein's equations allow the
study to be extended from the linearized approximation, where the system is
treated as a perturb... | [
{
"created": "Mon, 23 Jun 2003 19:40:02 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Aug 2003 18:42:58 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Zlochower",
"Yosef",
""
],
[
"Gomez",
"Roberto",
""
],
[
"Husa",
"Sascha",
""
],
[
"Lehner",
"Luis",
""
],
[
"Winicour",
"Jeffrey",
""
]
] | We study the properties of the outgoing gravitational wave produced when a non-spinning black hole is excited by an ingoing gravitational wave. Simulations using a numerical code for solving Einstein's equations allow the study to be extended from the linearized approximation, where the system is treated as a perturbed... |
gr-qc/0612061 | Lau Loi So | Lau Loi So and James M. Nester | Gravitational energy-momentum in small regions according to Moller's
tetrad expression | 8 pages | null | null | null | gr-qc | null | Moller's tetrad gravitational energy-momentum "tensor" is evaluated for a
small vacuum region using an orthonormal frame adapted to Riemann normal
coordinates. We find that it does satisfy the highly desired property of being
a positive multiple of the Bel-Robinson tensor.
| [
{
"created": "Mon, 11 Dec 2006 11:47:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"So",
"Lau Loi",
""
],
[
"Nester",
"James M.",
""
]
] | Moller's tetrad gravitational energy-momentum "tensor" is evaluated for a small vacuum region using an orthonormal frame adapted to Riemann normal coordinates. We find that it does satisfy the highly desired property of being a positive multiple of the Bel-Robinson tensor. |
2308.01383 | Rosa-Laura Lechuga R.L. Lechuga | R.L. Lechuga, D. Sudarsky | Eternal inflation and collapse theories | 36 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The eternal inflation problem continues to be considered one of standard's
cosmology most serious shortcomings. This arises when one considers the effects
of "quantum fluctuations" (QF) on the zero mode of inflaton field during a
Hubble time in the inflationary epoch. In the slow-roll regime it is quite
clear that su... | [
{
"created": "Wed, 2 Aug 2023 18:52:28 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Nov 2023 00:38:56 GMT",
"version": "v2"
},
{
"created": "Tue, 21 Nov 2023 08:25:18 GMT",
"version": "v3"
}
] | 2023-11-22 | [
[
"Lechuga",
"R. L.",
""
],
[
"Sudarsky",
"D.",
""
]
] | The eternal inflation problem continues to be considered one of standard's cosmology most serious shortcomings. This arises when one considers the effects of "quantum fluctuations" (QF) on the zero mode of inflaton field during a Hubble time in the inflationary epoch. In the slow-roll regime it is quite clear that such... |
0908.0854 | Romain Gicquaud | Romain Gicquaud | Linearization stability of the Einstein constraint equations on an
asymptotically hyperbolic manifold | 19 pages, no figure | J. Math. Phys. 51 (2010), no. 7, 072501 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the linearization stability of the Einstein constraint equations on
an asymptotically hyperbolic manifold. In particular we prove that these
equations are linearization stable in the neighborhood of vacuum solutions for
a non-positive cosmological constant and of
Friedman--Lema\^itre--Robertson--Walker space... | [
{
"created": "Thu, 6 Aug 2009 12:43:20 GMT",
"version": "v1"
}
] | 2012-01-17 | [
[
"Gicquaud",
"Romain",
""
]
] | We study the linearization stability of the Einstein constraint equations on an asymptotically hyperbolic manifold. In particular we prove that these equations are linearization stable in the neighborhood of vacuum solutions for a non-positive cosmological constant and of Friedman--Lema\^itre--Robertson--Walker spaces ... |
1704.07044 | Soham Bhattacharyya | Soham Bhattacharyya (1), S. Shankaranarayanan (1) ((1) IISER-TVM) | Quasinormal modes as a distinguisher between general relativity and f(R)
gravity | 9 pages, 2 figures, version as accepted in Physical Review D | Phys. Rev. D 96, 064044 (2017) | 10.1103/PhysRevD.96.064044 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasi-Normal Modes (QNM) or ringdown phase of gravitational waves provide
critical information about the structure of compact objects like Black Holes.
Thus, QNMs can be a tool to test General Relativity (GR) and possible
deviations from it. In the case of GR, it is known for a long time that a
relation between two t... | [
{
"created": "Mon, 24 Apr 2017 05:23:42 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Aug 2017 14:31:28 GMT",
"version": "v2"
}
] | 2017-10-04 | [
[
"Bhattacharyya",
"Soham",
"",
"IISER-TVM"
],
[
"Shankaranarayanan",
"S.",
"",
"IISER-TVM"
]
] | Quasi-Normal Modes (QNM) or ringdown phase of gravitational waves provide critical information about the structure of compact objects like Black Holes. Thus, QNMs can be a tool to test General Relativity (GR) and possible deviations from it. In the case of GR, it is known for a long time that a relation between two typ... |
1801.08604 | Remi Geiger | Remi Geiger, Michael Trupke | Proposal for a Quantum Test of the Weak Equivalence Principle with
Entangled Atomic Species | 5 pages, 1 figure + Supplemental Material | Phys. Rev. Lett. 120, 043602 (2018) | 10.1103/PhysRevLett.120.043602 | null | gr-qc physics.atom-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose an experiment to test the Weak Equivalence Principle (WEP) with a
test mass consisting of two entangled atoms of different species. In the
proposed experiment, a coherent measurement of the differential gravity
acceleration between the two atomic species is considered, by entangling two
atom interferometer... | [
{
"created": "Thu, 25 Jan 2018 21:44:54 GMT",
"version": "v1"
}
] | 2018-01-29 | [
[
"Geiger",
"Remi",
""
],
[
"Trupke",
"Michael",
""
]
] | We propose an experiment to test the Weak Equivalence Principle (WEP) with a test mass consisting of two entangled atoms of different species. In the proposed experiment, a coherent measurement of the differential gravity acceleration between the two atomic species is considered, by entangling two atom interferometers ... |
gr-qc/9912005 | Peter Dunsby | G. F. R. Ellis, D. C. Roberts, D. Solomons and P. K. S. Dunsby | A Solution to the Graceful Exit Problem in Pre-Big Bang Cosmology | 16 pages LaTeX, 5 figures. To appear in Physical Review D | null | 10.1103/PhysRevD.62.084004 | uct-cosmology-99/04 | gr-qc | null | We examine the string cosmology equations with a dilaton potential in the
context of the Pre-Big Bang Scenario with the desired scale factor duality, and
give a generic algorithm for obtaining solutions with appropriate evolutionary
properties. This enables us to find pre-big bang type solutions with suitable
dilaton... | [
{
"created": "Wed, 1 Dec 1999 21:34:13 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Mar 2000 12:13:34 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Mar 2000 07:49:49 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Ellis",
"G. F. R.",
""
],
[
"Roberts",
"D. C.",
""
],
[
"Solomons",
"D.",
""
],
[
"Dunsby",
"P. K. S.",
""
]
] | We examine the string cosmology equations with a dilaton potential in the context of the Pre-Big Bang Scenario with the desired scale factor duality, and give a generic algorithm for obtaining solutions with appropriate evolutionary properties. This enables us to find pre-big bang type solutions with suitable dilaton b... |
1805.08229 | Enrico Barausse | Enrico Barausse, Richard Brito, Vitor Cardoso, Irina Dvorkin, Paolo
Pani | The stochastic gravitational-wave background in the absence of horizons | 7 pages, 4 figures. Analysis improved by using spin-2 instability
timescale, conclusions unchanged. Published in CQG Letters | Classical and Quantum Gravity, Volume 35, Number 20, 2018 | 10.1088/1361-6382/aae1de | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave astronomy has the potential to explore one of the deepest
and most puzzling aspects of Einstein's theory: the existence of black holes. A
plethora of ultracompact, horizonless objects have been proposed to arise in
models inspired by quantum gravity. These objects may solve Hawking's
information-lo... | [
{
"created": "Mon, 21 May 2018 18:01:15 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Oct 2018 08:37:29 GMT",
"version": "v2"
}
] | 2018-10-04 | [
[
"Barausse",
"Enrico",
""
],
[
"Brito",
"Richard",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Dvorkin",
"Irina",
""
],
[
"Pani",
"Paolo",
""
]
] | Gravitational-wave astronomy has the potential to explore one of the deepest and most puzzling aspects of Einstein's theory: the existence of black holes. A plethora of ultracompact, horizonless objects have been proposed to arise in models inspired by quantum gravity. These objects may solve Hawking's information-loss... |
1602.02037 | Andres Anabalon | Andres Anabalon and Carlos Batista | A Class of Integrable Metrics | 19 pages, no figures | Phys. Rev. D 93, 064079 (2016) | 10.1103/PhysRevD.93.064079 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In four dimensions, the most general metric admitting two Killing vectors and
a rank-two Killing tensor can be parameterized by ten arbitrary functions of a
single variable. We show that picking a special vierbien, reducing the system
to eight functions, implies the existence of two geodesic and share-free, null
cong... | [
{
"created": "Fri, 5 Feb 2016 14:33:14 GMT",
"version": "v1"
}
] | 2016-04-06 | [
[
"Anabalon",
"Andres",
""
],
[
"Batista",
"Carlos",
""
]
] | In four dimensions, the most general metric admitting two Killing vectors and a rank-two Killing tensor can be parameterized by ten arbitrary functions of a single variable. We show that picking a special vierbien, reducing the system to eight functions, implies the existence of two geodesic and share-free, null congru... |
gr-qc/9703048 | Hugo Villegas Brena | T. Matos (1 and 2) and H. Villegas (2) ((1) IFM-UMSNH, Mexico, (2)
Dept. Fisica, CINVESTAV, Mexico) | Post-post-newtonian limit of a dilatonic gravity model | 4 pages, LaTeX, no figures, to appear in the proceedings of the `2nd.
mexican school on gravitation and mathematical physics' | null | null | FIS-CINVESTAV-97-345 | gr-qc | null | We study a solution of the field equations for dilatonic gravity and obtain
its post-post-newtonian limit. It turns out that terms to this and higher
orders in the expansion may become important in strong gravitational fields,
even though the post-newtonian limit coincides with that of General Relativity.
This sugges... | [
{
"created": "Tue, 18 Mar 1997 22:01:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Matos",
"T.",
"",
"1 and 2"
],
[
"Villegas",
"H.",
""
]
] | We study a solution of the field equations for dilatonic gravity and obtain its post-post-newtonian limit. It turns out that terms to this and higher orders in the expansion may become important in strong gravitational fields, even though the post-newtonian limit coincides with that of General Relativity. This suggests... |
1211.0247 | Paul R. Anderson | Paul R. Anderson, Carmen Molina-Paris, Dillon H. Sanders | Validity of the semiclassical approximation during the preheating phase
of chaotic inflation | 8 pages, 3 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The semiclassical approximation has frequently been used to describe the
initial stage of particle production, often called preheating, which occurs
after the inflationary epoch in chaotic models of inflation. During this phase
backreaction effects from the produced particles on the inflaton field are
significant, an... | [
{
"created": "Thu, 1 Nov 2012 18:33:01 GMT",
"version": "v1"
}
] | 2012-11-02 | [
[
"Anderson",
"Paul R.",
""
],
[
"Molina-Paris",
"Carmen",
""
],
[
"Sanders",
"Dillon H.",
""
]
] | The semiclassical approximation has frequently been used to describe the initial stage of particle production, often called preheating, which occurs after the inflationary epoch in chaotic models of inflation. During this phase backreaction effects from the produced particles on the inflaton field are significant, and ... |
1610.01590 | Michael Kesden | Benjamin Cashen, Adam Aker, Michael Kesden | Gravitomagnetic dynamical friction | 9 pages, 7 figures, PRD published version | Phys. Rev. D 95, 064014 (2017) | 10.1103/PhysRevD.95.064014 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A supermassive black hole moving through a field of stars will
gravitationally scatter the stars, inducing a backreaction force on the black
hole known as dynamical friction. In Newtonian gravity, the axisymmetry of the
system about the black hole's velocity $\mathbf{v}$ implies that the dynamical
friction must be an... | [
{
"created": "Tue, 4 Oct 2016 20:05:13 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Mar 2017 00:57:44 GMT",
"version": "v2"
}
] | 2017-03-16 | [
[
"Cashen",
"Benjamin",
""
],
[
"Aker",
"Adam",
""
],
[
"Kesden",
"Michael",
""
]
] | A supermassive black hole moving through a field of stars will gravitationally scatter the stars, inducing a backreaction force on the black hole known as dynamical friction. In Newtonian gravity, the axisymmetry of the system about the black hole's velocity $\mathbf{v}$ implies that the dynamical friction must be anti... |
1912.10582 | Roman Konoplya | R. A. Konoplya | Quantum corrected black holes: quasinormal modes, scattering, shadows | 6 pages, 3 figures, revtex, some numerical data is corrected, new
material is added | Phys.Lett. B804 (2020) 135363 | 10.1016/j.physletb.2020.135363 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spherically symmetric deformation of the Schwarzschild solution owing to
the quantum corrections to gravity is known as Kazakov-Solodukhin black-hole
metric. Neglecting non-spherical deformations of the background the problem was
solved non-perturbatively. Here we analyze the basic characteristics of this
geometr... | [
{
"created": "Mon, 23 Dec 2019 01:59:18 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Dec 2019 22:16:33 GMT",
"version": "v2"
}
] | 2020-03-20 | [
[
"Konoplya",
"R. A.",
""
]
] | The spherically symmetric deformation of the Schwarzschild solution owing to the quantum corrections to gravity is known as Kazakov-Solodukhin black-hole metric. Neglecting non-spherical deformations of the background the problem was solved non-perturbatively. Here we analyze the basic characteristics of this geometry,... |
2201.12004 | Yaoguang Zheng | Wen-Xiang Chen, Yao-Guang Zheng | Analysis on superradiant stability of BTZ Black Hole | arXiv admin note: text overlap with arXiv:2103.04239; text overlap
with arXiv:2005.10268 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper adds a new variable y($\mu^{\prime}=y(\omega+m N^{\phi})$) to
extend the results of the classic paper. We exploit the properties of curve
integrals. When y is greater than a certain limit, the effective potential of
the equation has no pole, then there is no potential well outside the event
horizon, when $... | [
{
"created": "Fri, 28 Jan 2022 09:31:08 GMT",
"version": "v1"
}
] | 2022-07-26 | [
[
"Chen",
"Wen-Xiang",
""
],
[
"Zheng",
"Yao-Guang",
""
]
] | This paper adds a new variable y($\mu^{\prime}=y(\omega+m N^{\phi})$) to extend the results of the classic paper. We exploit the properties of curve integrals. When y is greater than a certain limit, the effective potential of the equation has no pole, then there is no potential well outside the event horizon, when $\s... |
0901.0851 | Gerhard Zumbusch | Gerhard Zumbusch | Finite Element, Discontinuous Galerkin, and Finite Difference Evolution
Schemes in Spacetime | final version | Class.Quant.Grav.26:175011,2009 | 10.1088/0264-9381/26/17/175011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Numerical schemes for Einstein's vacuum equation are developed. Einstein's
equation in harmonic gauge is second order symmetric hyperbolic. It is
discretized in four-dimensional spacetime by Finite Differences, Finite
Elements, and Interior Penalty Discontinuous Galerkin methods, the latter
related to Regge calculus.... | [
{
"created": "Wed, 7 Jan 2009 18:34:11 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Jul 2009 14:49:17 GMT",
"version": "v2"
}
] | 2009-08-17 | [
[
"Zumbusch",
"Gerhard",
""
]
] | Numerical schemes for Einstein's vacuum equation are developed. Einstein's equation in harmonic gauge is second order symmetric hyperbolic. It is discretized in four-dimensional spacetime by Finite Differences, Finite Elements, and Interior Penalty Discontinuous Galerkin methods, the latter related to Regge calculus. T... |
2101.06600 | Che-Yu Chen | Che-Yu Chen, Sohyun Park | Black hole quasinormal modes and isospectrality in Deser-Woodard
nonlocal gravity | 10 pages | Phys. Rev. D 103, 064029 (2021) | 10.1103/PhysRevD.103.064029 | CERN-TH-2021-011 | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate the gravitational perturbations of the Schwarzschild black
hole in the nonlocal gravity model recently proposed by Deser and Woodard
(DW-II). The analysis is performed in the localized version in which the
nonlocal corrections are represented by some auxiliary scalar fields. We find
that the nonlocal c... | [
{
"created": "Sun, 17 Jan 2021 06:11:02 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Mar 2021 14:37:17 GMT",
"version": "v2"
}
] | 2021-03-19 | [
[
"Chen",
"Che-Yu",
""
],
[
"Park",
"Sohyun",
""
]
] | We investigate the gravitational perturbations of the Schwarzschild black hole in the nonlocal gravity model recently proposed by Deser and Woodard (DW-II). The analysis is performed in the localized version in which the nonlocal corrections are represented by some auxiliary scalar fields. We find that the nonlocal cor... |
1001.4733 | Norbert Wex | N. Wex, M. Kramer | Generic Gravity Tests with the Double Pulsar | 3 pages, no figures, Proceedings of the 12th Marcel Grossmann Meeting
on General Relativity (MG 12), Paris, France, 12-18 Jul 2009 | null | null | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Presently the double pulsar allows for the measurement of six post-Keplerian
parameters. In addition, its double-line nature gives access to the projected
semi-major axes of both orbits. We use this wealth of information to pose some
very general restrictions on a wide class of conservative and semi-conservative
theo... | [
{
"created": "Tue, 26 Jan 2010 16:21:02 GMT",
"version": "v1"
}
] | 2010-01-27 | [
[
"Wex",
"N.",
""
],
[
"Kramer",
"M.",
""
]
] | Presently the double pulsar allows for the measurement of six post-Keplerian parameters. In addition, its double-line nature gives access to the projected semi-major axes of both orbits. We use this wealth of information to pose some very general restrictions on a wide class of conservative and semi-conservative theori... |
0910.0673 | Rafael Sorkin | Rafael D. Sorkin | Light, Links and Causal Sets | plainTeX, 18 pages, no figures. Most current version is available at
http://www.physics.syr.edu/~sorkin/some.papers/ (or wherever my home-page may
be) | J.Phys.Conf.Ser.174:012018,2009 | 10.1088/1742-6596/174/1/012018 | null | gr-qc cond-mat.stat-mech hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After sketching a context in which to seek observable signals of
spatio-temporal discreteness, I briefly review the status of the causal set
program for quantum gravity, concluding with a simple model for the field
produced by a moving charge in a background causal set.
| [
{
"created": "Mon, 5 Oct 2009 04:12:54 GMT",
"version": "v1"
}
] | 2010-11-02 | [
[
"Sorkin",
"Rafael D.",
""
]
] | After sketching a context in which to seek observable signals of spatio-temporal discreteness, I briefly review the status of the causal set program for quantum gravity, concluding with a simple model for the field produced by a moving charge in a background causal set. |
gr-qc/0202085 | Robert T. Jantzen | Donato Bini and Robert T. Jantzen | Circular Holonomy, Clock Effects and Gravitoelectromagnetism: Still
Going Around in Circles After All These Years | 27 pages, latex(2e), ws-p9-75x6-50 class, uses overcite package, 7
pictex figures, 3 eps figures; to appear in the Proceedings of the 9th ICRA
Network Workshop on Fermi and Astrophysics (2001), Eds. R. Ruffini and C.
Sigismondi, World Scientific, 2003. Killing tensor remarks corrected. Figure
7 slightly correct... | Nuovo Cim.B117:983-1008,2003 | null | null | gr-qc | null | The historical origins of Fermi-Walker transport and Fermi coordinates and
the construction of Fermi-Walker transported frames in black hole spacetimes
are reviewed. For geodesics this transport reduces to parallel transport and
these frames can be explicitly constructed using a Killing-Yano tensor as shown
by Marck.... | [
{
"created": "Sun, 24 Feb 2002 23:21:49 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jan 2003 21:39:43 GMT",
"version": "v2"
}
] | 2010-11-11 | [
[
"Bini",
"Donato",
""
],
[
"Jantzen",
"Robert T.",
""
]
] | The historical origins of Fermi-Walker transport and Fermi coordinates and the construction of Fermi-Walker transported frames in black hole spacetimes are reviewed. For geodesics this transport reduces to parallel transport and these frames can be explicitly constructed using a Killing-Yano tensor as shown by Marck. F... |
gr-qc/9610040 | Raphael Bousso | Raphael Bousso (DAMTP, Cambridge) | Pair Creation of Dilaton Black Holes in Extended Inflation | 23 pages, LaTeX, 6 figures; submitted to Phys. Rev. D | Phys. Rev. D 55, 4889 (1997) | 10.1103/PhysRevD.55.4889 | DAMTP/R-96/42 | gr-qc hep-th | null | Dilatonic Charged Nariai instantons mediate the nucleation of black hole
pairs during extended chaotic inflation. Depending on the dilaton and inflaton
fields, the black holes are described by one of two approximations in the
Lorentzian regime. For each case we find Euclidean solutions that satisfy the
no boundary pr... | [
{
"created": "Thu, 17 Oct 1996 18:20:28 GMT",
"version": "v1"
}
] | 2016-08-24 | [
[
"Bousso",
"Raphael",
"",
"DAMTP, Cambridge"
]
] | Dilatonic Charged Nariai instantons mediate the nucleation of black hole pairs during extended chaotic inflation. Depending on the dilaton and inflaton fields, the black holes are described by one of two approximations in the Lorentzian regime. For each case we find Euclidean solutions that satisfy the no boundary prop... |
2311.08465 | Parampreet Singh | Meysam Motaharfar, Parampreet Singh, Eklavya Thareja | On the classicality and uniqueness in loop quantization of Bianchi-I
spacetimes | 20 pages, 15 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In loop quantum cosmology, ambiguities in the Hamiltonian constraint can
result in models with varying phenomenological predictions. In the homogeneous
isotropic models, these ambiguities were settled, and the improved dynamics was
found to be a unique and phenomenologically viable choice. This issue has
remained uns... | [
{
"created": "Tue, 14 Nov 2023 19:00:23 GMT",
"version": "v1"
}
] | 2023-11-16 | [
[
"Motaharfar",
"Meysam",
""
],
[
"Singh",
"Parampreet",
""
],
[
"Thareja",
"Eklavya",
""
]
] | In loop quantum cosmology, ambiguities in the Hamiltonian constraint can result in models with varying phenomenological predictions. In the homogeneous isotropic models, these ambiguities were settled, and the improved dynamics was found to be a unique and phenomenologically viable choice. This issue has remained unset... |
gr-qc/9611068 | Sardanashvily Gennadi | G. Sardanashvily and K. Kirillov | Energy-Momentum in Gauge Gravitation Theory | 24 pages, latex, no figures | null | null | null | gr-qc | null | Building on the first variational formula of the calculus of variations, one
can derive the energy-momentum conservation laws from the condition of the Lie
derivative of gravitation Lagrangians along vector fields corresponding to
generators of general covariant transformations to be equal to zero. The goal
is to con... | [
{
"created": "Thu, 28 Nov 1996 23:40:25 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sardanashvily",
"G.",
""
],
[
"Kirillov",
"K.",
""
]
] | Building on the first variational formula of the calculus of variations, one can derive the energy-momentum conservation laws from the condition of the Lie derivative of gravitation Lagrangians along vector fields corresponding to generators of general covariant transformations to be equal to zero. The goal is to const... |
1807.03864 | Masooma Ali | Masooma Ali, Syed Moeez Hassan, Viqar Husain | The Universe as an Oscillator | 11 pages, 2 figures, references added | Phys. Rev. D 98, 086002 (2018) | 10.1103/PhysRevD.98.086002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the idea of using a matter time gauge in quantum gravity to quantum
cosmology. For the Friedmann-Lemaitre-Robertson-Walker (FLRW) Universe with
dust and cosmological constant $\Lambda$, we show that the dynamics maps
exactly to the simple harmonic oscillator in the dust-time gauge. For $\Lambda
>0$ the oscil... | [
{
"created": "Tue, 10 Jul 2018 21:08:25 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Jul 2018 13:43:41 GMT",
"version": "v2"
}
] | 2018-10-10 | [
[
"Ali",
"Masooma",
""
],
[
"Hassan",
"Syed Moeez",
""
],
[
"Husain",
"Viqar",
""
]
] | We apply the idea of using a matter time gauge in quantum gravity to quantum cosmology. For the Friedmann-Lemaitre-Robertson-Walker (FLRW) Universe with dust and cosmological constant $\Lambda$, we show that the dynamics maps exactly to the simple harmonic oscillator in the dust-time gauge. For $\Lambda >0$ the oscilla... |
1208.4770 | Iver Brevik | I. Brevik, R. Myrzakulov, S. Nojiri and S. D. Odintsov | Turbulence and Little Rip Cosmology | null | Physical Review D 86, N6, 063007 (2012) | 10.1103/PhysRevD.86.063007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A variety of conditions is considered under which the cosmic dark fluid may
be able to develop a future Big Rip or Little Rip singularity. Both
one-component and two-component models are considered. In the last-mentioned
case we present a way in which the fluid can be decomposed into two components,
one non-turbulent... | [
{
"created": "Thu, 23 Aug 2012 14:40:00 GMT",
"version": "v1"
}
] | 2012-09-25 | [
[
"Brevik",
"I.",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Nojiri",
"S.",
""
],
[
"Odintsov",
"S. D.",
""
]
] | A variety of conditions is considered under which the cosmic dark fluid may be able to develop a future Big Rip or Little Rip singularity. Both one-component and two-component models are considered. In the last-mentioned case we present a way in which the fluid can be decomposed into two components, one non-turbulent (... |
gr-qc/9909004 | Jose Geraldo Pereira | V. C. de Andrade, L. C. T. Guillen and J. G. Pereira | Teleparallel Equivalent of the Kaluza-Klein Theory | 5 pages, no figures, RevTeX; title and presentation changes, a new
paragraph and references added, version to appear in Phys. Rev. D | Phys.Rev. D61 (2000) 084031 | 10.1103/PhysRevD.61.084031 | null | gr-qc hep-th | null | Relying upon the equivalence between a gauge theory for the translation group
and general relativity, a teleparallel version of the original Kaluza-Klein
theory is developed. In this model, only the internal space (fiber) turns out
to be five dimensional, spacetime being kept always four dimensional. A
five-dimension... | [
{
"created": "Wed, 1 Sep 1999 17:20:42 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Feb 2000 18:13:26 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"de Andrade",
"V. C.",
""
],
[
"Guillen",
"L. C. T.",
""
],
[
"Pereira",
"J. G.",
""
]
] | Relying upon the equivalence between a gauge theory for the translation group and general relativity, a teleparallel version of the original Kaluza-Klein theory is developed. In this model, only the internal space (fiber) turns out to be five dimensional, spacetime being kept always four dimensional. A five-dimensional... |
gr-qc/0005033 | Poghos F. Kazarian | Poghos F. Kazarian | On the Tensor Field Inflation in the GR Homogeneous Cosmological Model | Accepted for publication in Phys Rev D; referee's comments and
suggestions considered | null | null | YSU preprint 20/03/2000 | gr-qc | null | The homogeneous cosmological model in GR is proposed, where the vacuum
energy, which can cause the inflation, is described by tensor field rather than
by commonly used in inflationary scenarios scalar field. It is shown that if
the initial values of the field are sufficiently big (comparable with the
Planck units), u... | [
{
"created": "Wed, 10 May 2000 16:57:39 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Dec 2000 01:11:25 GMT",
"version": "v2"
},
{
"created": "Sun, 18 Feb 2001 21:30:11 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Kazarian",
"Poghos F.",
""
]
] | The homogeneous cosmological model in GR is proposed, where the vacuum energy, which can cause the inflation, is described by tensor field rather than by commonly used in inflationary scenarios scalar field. It is shown that if the initial values of the field are sufficiently big (comparable with the Planck units), und... |
1212.2432 | Emanuel Gallo | Emanuel Gallo and O. M. Moreschi | Approximation Method for the Relaxed Covariant Form of the Gravitational
Field Equations for Particles | 8 pages | Journal of Modern Physics, Vol. 3 No. 9A, 2012, pp. 1247-1254
(Special Issue on Gravitation, Astrophysics and Cosmology) | 10.4236/jmp.2012.329161 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a study of the so called relaxed field equations of general
relativity in terms of a decomposition of the metric; which is designed to deal
with the notion of particles. Several known results are generalized to a
coordinate free covariant discussion. We apply our techniques to the study of a
particle up to... | [
{
"created": "Tue, 11 Dec 2012 14:19:35 GMT",
"version": "v1"
}
] | 2012-12-12 | [
[
"Gallo",
"Emanuel",
""
],
[
"Moreschi",
"O. M.",
""
]
] | We present a study of the so called relaxed field equations of general relativity in terms of a decomposition of the metric; which is designed to deal with the notion of particles. Several known results are generalized to a coordinate free covariant discussion. We apply our techniques to the study of a particle up to s... |
2004.13276 | Zhi Liu | Micheal S. Berger and Zhi Liu | Observables in quantum field theory on a collapsing black hole
background | 6 pages, 3 figures, the paper is rewritten, additional results on
perceived observables added | Phys. Lett. B 811 (2020) 135934 | 10.1016/j.physletb.2020.135934 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the quantum radiation from a curved background using scalar
observables constructed from the (1+1) dimensional renormalized stress-energy
tensor (RSET). We compute energy density $\cal U$, flux $\cal F$ and pressure
$\cal P$ for an arbitrary collapse scenario and an arbitrary observer. The
results show a cle... | [
{
"created": "Tue, 28 Apr 2020 04:05:03 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Nov 2020 15:49:10 GMT",
"version": "v2"
}
] | 2020-11-13 | [
[
"Berger",
"Micheal S.",
""
],
[
"Liu",
"Zhi",
""
]
] | We study the quantum radiation from a curved background using scalar observables constructed from the (1+1) dimensional renormalized stress-energy tensor (RSET). We compute energy density $\cal U$, flux $\cal F$ and pressure $\cal P$ for an arbitrary collapse scenario and an arbitrary observer. The results show a clear... |
gr-qc/0106066 | Gaetano Lambiase | G. Papini, G. Lambiase | Spin-Rotation Coupling in Muon g-2 Experiments | 3 pages, RevTex file | Phys.Lett.A294:175-178,2002 | 10.1016/S0375-9601(02)00040-3 | null | gr-qc | null | Spin-rotation coupling, or Mashhoon effect, is a phenomenon associated with
rotating observers. We show that the effect exists and plays a fundamental role
in the determination of the anomalous magnetic moment of the muon.
| [
{
"created": "Thu, 21 Jun 2001 10:19:41 GMT",
"version": "v1"
}
] | 2011-09-14 | [
[
"Papini",
"G.",
""
],
[
"Lambiase",
"G.",
""
]
] | Spin-rotation coupling, or Mashhoon effect, is a phenomenon associated with rotating observers. We show that the effect exists and plays a fundamental role in the determination of the anomalous magnetic moment of the muon. |
2101.06378 | Abolhassan Mohammadi | Abolhassan Mohammadi, Tayeb Golanbari, Kazuharu Bamba, Iarley P. Lobo | Tsallis holographic dark energy for inflation | 7 pages, 4 figures | Phys. Rev. D 103, 083505 (2021) | 10.1103/PhysRevD.103.083505 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The application of holographic principle in very early time is studied. The
consideration of the principle in the late-time evolution will be a good
motivation to study its role at the time of inflation. Since the length scale
is expected to be small during inflation, the resulted energy density form the
holographic ... | [
{
"created": "Sat, 16 Jan 2021 05:57:44 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Mar 2021 09:43:34 GMT",
"version": "v2"
}
] | 2021-04-21 | [
[
"Mohammadi",
"Abolhassan",
""
],
[
"Golanbari",
"Tayeb",
""
],
[
"Bamba",
"Kazuharu",
""
],
[
"Lobo",
"Iarley P.",
""
]
] | The application of holographic principle in very early time is studied. The consideration of the principle in the late-time evolution will be a good motivation to study its role at the time of inflation. Since the length scale is expected to be small during inflation, the resulted energy density form the holographic pr... |
gr-qc/0506030 | Masoud Alimohammadi | H. Mohseni Sadjadi and M. Alimohammadi | Electrostatic self-energy and Bekenstein entropy bound in the massive
Schwinger model | 14 pages, accepted for publication in "Gen. Rel. Grav. (2005)" | Gen.Rel.Grav. 37 (2005) 1809-1822 | 10.1007/s10714-005-0160-6 | null | gr-qc hep-th | null | We obtain the electrostatic energy of two opposite charges near the horizon
of stationary black-holes in the massive Schwinger model. Besides the confining
aspects of the model, we discuss the Bekenstein entropy upper bound of a
charged object using the generalized second law. We show that despite the
massless case, ... | [
{
"created": "Mon, 6 Jun 2005 07:39:35 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Sadjadi",
"H. Mohseni",
""
],
[
"Alimohammadi",
"M.",
""
]
] | We obtain the electrostatic energy of two opposite charges near the horizon of stationary black-holes in the massive Schwinger model. Besides the confining aspects of the model, we discuss the Bekenstein entropy upper bound of a charged object using the generalized second law. We show that despite the massless case, in... |
1108.1921 | Ali Nur Nurbaki | Ali Nur Nurbaki | Killing-Yano Tensors of Valence-2 in the Standard Kaluza-Klein Theory | M. Sc. Thesis, 38 pages | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work is constructed on two main concepts: Killing-Yano symmetry and the
Kaluza-Klein theory. Those concepts are reviewed in the first three chapters.
In the fourth chapter firstly Killing-Yano equations of valence-2 are obtained
for a general 5-dimensional metric and then reduced for the Minkowski metric.
It is ... | [
{
"created": "Tue, 9 Aug 2011 13:15:44 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Aug 2011 19:37:30 GMT",
"version": "v2"
}
] | 2011-08-12 | [
[
"Nurbaki",
"Ali Nur",
""
]
] | This work is constructed on two main concepts: Killing-Yano symmetry and the Kaluza-Klein theory. Those concepts are reviewed in the first three chapters. In the fourth chapter firstly Killing-Yano equations of valence-2 are obtained for a general 5-dimensional metric and then reduced for the Minkowski metric. It is se... |
1305.1564 | Amos Ori | Amos Ori | Late-time tails in extremal Reissner-Nordstrom spacetime | 4 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This note discusses the late-time decay of perturbations outside extremal
Reissner-Nordstrom black hole. We consider individual spherical-harmonic modes
$l$ of massless scalar field. The initial data are assumed to be of compact
support, with generic regular behavior across the horizon. The scalar
perturbations are f... | [
{
"created": "Tue, 7 May 2013 15:54:02 GMT",
"version": "v1"
}
] | 2013-05-08 | [
[
"Ori",
"Amos",
""
]
] | This note discusses the late-time decay of perturbations outside extremal Reissner-Nordstrom black hole. We consider individual spherical-harmonic modes $l$ of massless scalar field. The initial data are assumed to be of compact support, with generic regular behavior across the horizon. The scalar perturbations are fou... |
2207.05029 | Philip Klaus Schwartz | Domenico Giulini, Andr\'e Gro{\ss}ardt, Philip K. Schwartz | Coupling Quantum Matter and Gravity | 53+6 pages (main text + references), 1 figure. Invited contribution
to the forthcoming book "Modified and Quantum Gravity - From Theory to
Experimental Searches on All Scales", eds. C. L\"ammerzahl and C. Pfeifer.
v2: Added exercises and concluding remarks; minor reformulations | in: C. Pfeifer, C. L\"ammerzahl (eds.), Modified and Quantum
Gravity, Lecture Notes in Physics 1017 (Springer, Cham, 2023) | 10.1007/978-3-031-31520-6_16 | null | gr-qc physics.atom-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this contribution we deal with several issues one encounters when trying
to couple quantum matter to classical gravitational fields. We start with a
general background discussion and then move on to two more technical sections.
In the first technical part we consider the question how the Hamiltonian of a
composite... | [
{
"created": "Mon, 11 Jul 2022 17:31:30 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Nov 2022 19:06:37 GMT",
"version": "v2"
}
] | 2023-10-13 | [
[
"Giulini",
"Domenico",
""
],
[
"Großardt",
"André",
""
],
[
"Schwartz",
"Philip K.",
""
]
] | In this contribution we deal with several issues one encounters when trying to couple quantum matter to classical gravitational fields. We start with a general background discussion and then move on to two more technical sections. In the first technical part we consider the question how the Hamiltonian of a composite t... |
2306.10498 | Hang Liu | Hang Liu | Quasinormal modes of phantom Reissner-Nordstr\"om-de Sitter black holes | Accepted for publication on EPJC | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate some characteristics of phantom
Reissner-Nordstr\"om-de Sitter (RN-dS) black holes. The peculiar feature of
phantom field renders this kind of black holes quite different from their
counterparts. We can only find at most two horizons in this spacetime, i.e.
event horizon and cosmological... | [
{
"created": "Sun, 18 Jun 2023 08:34:22 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Oct 2023 14:37:25 GMT",
"version": "v2"
}
] | 2023-10-03 | [
[
"Liu",
"Hang",
""
]
] | In this paper, we investigate some characteristics of phantom Reissner-Nordstr\"om-de Sitter (RN-dS) black holes. The peculiar feature of phantom field renders this kind of black holes quite different from their counterparts. We can only find at most two horizons in this spacetime, i.e. event horizon and cosmological h... |
1908.04410 | Amir Jafari | Amir Jafari | Gravitational Radiation from Binaries: A Pedagogical Introduction | null | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This short note serves as an introduction to gravitational radiation through
reviewing the inspiral-plunge transition phase in extreme mass ratio binaries.
We study the relativistic motion of a compact object (CO) of mass $m$ around a
massive black hole of mass $M\gg m$. The Kerr-Newman metric, effective
potential fo... | [
{
"created": "Wed, 7 Aug 2019 04:50:00 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Aug 2019 04:09:11 GMT",
"version": "v2"
}
] | 2019-08-20 | [
[
"Jafari",
"Amir",
""
]
] | This short note serves as an introduction to gravitational radiation through reviewing the inspiral-plunge transition phase in extreme mass ratio binaries. We study the relativistic motion of a compact object (CO) of mass $m$ around a massive black hole of mass $M\gg m$. The Kerr-Newman metric, effective potential for ... |
2302.12849 | Olivier Sarbach | Paola Rioseco and Olivier Sarbach | Phase space mixing of a Vlasov gas in the exterior of a Kerr black hole | 52 pages, 6 figures | null | null | null | gr-qc astro-ph.GA math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the dynamics of a collisionless kinetic gas whose particles follow
future-directed timelike and spatially bound geodesics in the exterior of a
sub-extremal Kerr black hole spacetime. Based on the use of generalized
action-angle variables, we analyze the large time asymptotic behavior of
macroscopic observabl... | [
{
"created": "Fri, 24 Feb 2023 19:00:03 GMT",
"version": "v1"
}
] | 2023-02-28 | [
[
"Rioseco",
"Paola",
""
],
[
"Sarbach",
"Olivier",
""
]
] | We study the dynamics of a collisionless kinetic gas whose particles follow future-directed timelike and spatially bound geodesics in the exterior of a sub-extremal Kerr black hole spacetime. Based on the use of generalized action-angle variables, we analyze the large time asymptotic behavior of macroscopic observables... |
gr-qc/0412103 | Ludovico Carbone | L. Carbone, A. Cavalleri, R. Dolesi, C. D. Hoyle, M. Hueller, S.
Vitale, W. J. Weber | Characterization of disturbance sources for LISA: torsion pendulum
results | 11 pages, 8 figures, accepted for publication Classical and Quantum
Gravity | Class.Quant.Grav. 22 (2005) S509-S520 | 10.1088/0264-9381/22/10/051 | null | gr-qc | null | A torsion pendulum allows ground-based investigation of the purity of
free-fall for the LISA test masses inside their capacitive position sensor.
This paper presents recent improvements in our torsion pendulum facility that
have both increased the pendulum sensitivity and allowed detailed
characterization of several ... | [
{
"created": "Tue, 21 Dec 2004 15:25:50 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Carbone",
"L.",
""
],
[
"Cavalleri",
"A.",
""
],
[
"Dolesi",
"R.",
""
],
[
"Hoyle",
"C. D.",
""
],
[
"Hueller",
"M.",
""
],
[
"Vitale",
"S.",
""
],
[
"Weber",
"W. J.",
""
]
] | A torsion pendulum allows ground-based investigation of the purity of free-fall for the LISA test masses inside their capacitive position sensor. This paper presents recent improvements in our torsion pendulum facility that have both increased the pendulum sensitivity and allowed detailed characterization of several im... |
2301.07160 | Genly Le\'on | Bayron Micolta-Riascos (Catolica del Norte U.), Alfredo D. Millano
(Catolica del Norte U.), Genly Leon (Catolica del Norte U. and DUT, Durban),
Cristi\'an Erices (Central U., Chile and Talca U.), Andronikos Paliathanasis
(Catolica del Norte U. and DUT, Durban) | Revisiting Fractional Cosmology | 58 pages, 8 figures. This article belongs to the Special Issue
Fractional Gravity/Cosmology in Classical and Quantum Regimes
https://www.mdpi.com/journal/fractalfract/special_issues/fractional_cosmology | Fractal Fract. 2023, 7, 149 | 10.3390/fractalfract7020149 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Recently, the research community has been exploring fractional calculus to
address problems related to cosmology; in this approach, the gravitational
action integral is altered, leading to a modified Friedmann equation, then the
resulting theory is compared against observational data. In this context,
dynamical syste... | [
{
"created": "Tue, 17 Jan 2023 20:09:44 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Feb 2023 21:04:10 GMT",
"version": "v2"
}
] | 2023-02-07 | [
[
"Micolta-Riascos",
"Bayron",
"",
"Catolica del Norte U."
],
[
"Millano",
"Alfredo D.",
"",
"Catolica del Norte U."
],
[
"Leon",
"Genly",
"",
"Catolica del Norte U. and DUT, Durban"
],
[
"Erices",
"Cristián",
"",
"Central U., Chile and Tal... | Recently, the research community has been exploring fractional calculus to address problems related to cosmology; in this approach, the gravitational action integral is altered, leading to a modified Friedmann equation, then the resulting theory is compared against observational data. In this context, dynamical systems... |
gr-qc/9309023 | null | Jos\'e P. S. Lemos and Paulo M. S\'a | Non-Singular Constant Curvature Two-Dimensional Black Hole | 6 pages, LaTex, Lisbon preprint DF/IST-8.93 (revised) | Mod.Phys.Lett. A9 (1994) 771-774 | 10.1142/S0217732394000587 | null | gr-qc | null | We show that the two-dimensional theory of Teitelboim and Jackiw has a black
hole solution, with two surprising properties: first, it has constant
curvature, and second, is free of spacetime singularities. The maximally
extended spacetime consists of an infinite chain of universes connected by
timelike wormholes.
| [
{
"created": "Thu, 23 Sep 1993 17:40:51 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Lemos",
"José P. S.",
""
],
[
"Sá",
"Paulo M.",
""
]
] | We show that the two-dimensional theory of Teitelboim and Jackiw has a black hole solution, with two surprising properties: first, it has constant curvature, and second, is free of spacetime singularities. The maximally extended spacetime consists of an infinite chain of universes connected by timelike wormholes. |
1308.1325 | Juan A. Valiente-Kroon | Christian L\"ubbe and Juan A. Valiente Kroon | On the conformal structure of the extremal Reissner-Nordstr\"om
spacetime | 35 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse various conformal properties of the extremal Reissner-Nordstr\"om
spacetime. In particular, we obtain conformal representations of the
neighbourhoods of spatial infinity, timelike infinity and the cylindrical end
---the so-called cylinders at spatial infinity and at the horizon,
respectively--- which are r... | [
{
"created": "Tue, 6 Aug 2013 16:12:23 GMT",
"version": "v1"
}
] | 2013-08-07 | [
[
"Lübbe",
"Christian",
""
],
[
"Kroon",
"Juan A. Valiente",
""
]
] | We analyse various conformal properties of the extremal Reissner-Nordstr\"om spacetime. In particular, we obtain conformal representations of the neighbourhoods of spatial infinity, timelike infinity and the cylindrical end ---the so-called cylinders at spatial infinity and at the horizon, respectively--- which are reg... |
1911.03260 | Slava G. Turyshev | Slava G. Turyshev, Viktor T. Toth | Image formation process with the solar gravitational lens | 13 pages, 6 figures | Phys. Rev. D 101, 044048 (2020) | 10.1103/PhysRevD.101.044048 | null | gr-qc astro-ph.IM physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study image formation with the solar gravitational lens (SGL). We consider
a point source that is positioned at a large but finite distance from the Sun.
We assume that an optical telescope is positioned in the image plane, in the
focal region of the SGL. We model the telescope as a convex lens and evaluate
the in... | [
{
"created": "Fri, 8 Nov 2019 13:47:30 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Feb 2020 17:54:59 GMT",
"version": "v2"
}
] | 2020-02-25 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Toth",
"Viktor T.",
""
]
] | We study image formation with the solar gravitational lens (SGL). We consider a point source that is positioned at a large but finite distance from the Sun. We assume that an optical telescope is positioned in the image plane, in the focal region of the SGL. We model the telescope as a convex lens and evaluate the inte... |
gr-qc/9712064 | Jayashree Balakrishna | Jayashree Balakrishna, Edward Seidel, Wai-Mo Suen | Dynamical Evolution of Boson Stars II: Excited States and
Self-Interacting Fields | 16 pages+ 13 figures . All figures are available at
http://wugrav.wustl.edu/Papers | Phys.Rev. D58 (1998) 104004 | 10.1103/PhysRevD.58.104004 | null | gr-qc | null | The dynamical evolution of self-gravitating scalar field configurations in
numerical relativity is studied. The previous analysis on ground state boson
stars of non-interacting fields is extended to excited states and to fields
with self couplings.
Self couplings can significantly change the physical dimensions of ... | [
{
"created": "Mon, 15 Dec 1997 20:06:33 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Balakrishna",
"Jayashree",
""
],
[
"Seidel",
"Edward",
""
],
[
"Suen",
"Wai-Mo",
""
]
] | The dynamical evolution of self-gravitating scalar field configurations in numerical relativity is studied. The previous analysis on ground state boson stars of non-interacting fields is extended to excited states and to fields with self couplings. Self couplings can significantly change the physical dimensions of boso... |
2107.09172 | David Sloan | David Sloan | Scale Symmetry and Friction | 20 pages | null | null | null | gr-qc physics.class-ph | http://creativecommons.org/licenses/by/4.0/ | Dynamical similarities are non-standard symmetries found in a wide range of
physical systems that identify solutions related by a change of scale. In this
paper we will show through a series of examples how this symmetry extends to
the space of couplings, as measured through observations of a system. This can
be expl... | [
{
"created": "Mon, 19 Jul 2021 21:53:55 GMT",
"version": "v1"
}
] | 2021-07-21 | [
[
"Sloan",
"David",
""
]
] | Dynamical similarities are non-standard symmetries found in a wide range of physical systems that identify solutions related by a change of scale. In this paper we will show through a series of examples how this symmetry extends to the space of couplings, as measured through observations of a system. This can be exploi... |
2406.08094 | Christian Friedrich Schmidt | Christian F. Schmidt, \'Alvaro Parra-L\'opez, Mireia Tolosa-Sime\'on,
Marius Sparn, Elinor Kath, Nikolas Liebster, Jelte Duchene, Helmut Strobel,
Markus K. Oberthaler, Stefan Floerchinger | Cosmological particle production in a quantum field simulator as a
quantum mechanical scattering problem | References and new section added. (22 + 14) pages, (13 + 7) figures,
(1+1) tables | null | null | null | gr-qc cond-mat.quant-gas hep-th | http://creativecommons.org/licenses/by/4.0/ | The production of quantum field excitations or particles in cosmological
spacetimes is a hallmark prediction of curved quantum field theory. The
generation of cosmological perturbations from quantum fluctuations in the early
universe constitutes an important application. The problem can be
quantum-simulated in terms ... | [
{
"created": "Wed, 12 Jun 2024 11:18:30 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jul 2024 09:41:05 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Jul 2024 15:08:29 GMT",
"version": "v3"
}
] | 2024-07-24 | [
[
"Schmidt",
"Christian F.",
""
],
[
"Parra-López",
"Álvaro",
""
],
[
"Tolosa-Simeón",
"Mireia",
""
],
[
"Sparn",
"Marius",
""
],
[
"Kath",
"Elinor",
""
],
[
"Liebster",
"Nikolas",
""
],
[
"Duchene",
"Jelte",
... | The production of quantum field excitations or particles in cosmological spacetimes is a hallmark prediction of curved quantum field theory. The generation of cosmological perturbations from quantum fluctuations in the early universe constitutes an important application. The problem can be quantum-simulated in terms of... |
2406.15604 | Sajad A. Bhat | Sajad A. Bhat, Srijit Bhattacharjee, and Shasvath J. Kapadia | Can the Near-Horizon Black Hole Memory be detected through Binary
Inspirals? | 12 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The memory effect, in the context of gravitational-waves (GWs), manifests
itself in the permanent relative displacement of test masses when they
encounter the GWs. A number of works have explored the possibility of detecting
the memory when the source and detector are separated by large distances. A
special type of m... | [
{
"created": "Fri, 21 Jun 2024 19:14:24 GMT",
"version": "v1"
}
] | 2024-06-25 | [
[
"Bhat",
"Sajad A.",
""
],
[
"Bhattacharjee",
"Srijit",
""
],
[
"Kapadia",
"Shasvath J.",
""
]
] | The memory effect, in the context of gravitational-waves (GWs), manifests itself in the permanent relative displacement of test masses when they encounter the GWs. A number of works have explored the possibility of detecting the memory when the source and detector are separated by large distances. A special type of mem... |
1408.6586 | Scott Fraser | Scott Fraser, Douglas M. Eardley | A Variational Principle for Asymptotically Randall-Sundrum Black Holes | 5 pages, REVTeX 4.1; for published version, see arXiv:1408.4425 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove the following variational principle for asymptotically
Randall-Sundrum (RS) black holes, based on the first law of black hole
mechanics: Instantaneously static initial data that extremizes the mass yields
a static black hole, for variations at fixed apparent horizon area, AdS
curvature length, cosmological c... | [
{
"created": "Wed, 27 Aug 2014 22:44:31 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Sep 2014 20:37:55 GMT",
"version": "v2"
},
{
"created": "Tue, 28 Jul 2015 01:22:27 GMT",
"version": "v3"
}
] | 2015-07-29 | [
[
"Fraser",
"Scott",
""
],
[
"Eardley",
"Douglas M.",
""
]
] | We prove the following variational principle for asymptotically Randall-Sundrum (RS) black holes, based on the first law of black hole mechanics: Instantaneously static initial data that extremizes the mass yields a static black hole, for variations at fixed apparent horizon area, AdS curvature length, cosmological con... |
1511.07051 | W. H. Zurek | Wojciech H. Zurek and Don N. Page | Firewalls, black-hole thermodynamics, and singular solutions of the
Tolman-Oppenheimer-Volkoff equation | We study self-gravitating spherically symmetric fluid with a mass of
a black hole surrounded by Hawking radiation. Solutions cross r=2M without
encountering coordinate singularity to reach a firewall-like "Planck cocoon"
with entropy close to black hole entropy. We reproduce our paper with an
updated title and ... | Physical Review D, Volume 29, Number 4, pp. 628 - 631 (1984) | 10.1103/PhysRevD.29.628 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate thermodynamic equilibrium of a self-gravitating perfect fluid
in a spherically symmetric system containing a black hole of mass M by means of
the Tolman-Oppenheimer-Volkoff (TOV) equation. At r >> 2M its solutions
describe a black-body radiation atmosphere with the Hawking temperature
T_BH~1/(8 \pi M) ... | [
{
"created": "Sun, 22 Nov 2015 18:49:04 GMT",
"version": "v1"
}
] | 2015-11-24 | [
[
"Zurek",
"Wojciech H.",
""
],
[
"Page",
"Don N.",
""
]
] | We investigate thermodynamic equilibrium of a self-gravitating perfect fluid in a spherically symmetric system containing a black hole of mass M by means of the Tolman-Oppenheimer-Volkoff (TOV) equation. At r >> 2M its solutions describe a black-body radiation atmosphere with the Hawking temperature T_BH~1/(8 \pi M) th... |
2401.16036 | Francesco Sartini | Salvatore Ribisi and Francesco Sartini | Phase spaces and symmetries of Vaidya superspace | 17 pages, 1 figure | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the classical symmetries of the dynamics of the null-dust
spherically symmetric Vaidya spacetime. Einstein's equations for this model can
be obtained as equations of motion of a two-dimensional field theory. We
discuss the transformations leaving invariant such equations of motion. These
are given by t... | [
{
"created": "Mon, 29 Jan 2024 10:37:14 GMT",
"version": "v1"
}
] | 2024-01-30 | [
[
"Ribisi",
"Salvatore",
""
],
[
"Sartini",
"Francesco",
""
]
] | We investigate the classical symmetries of the dynamics of the null-dust spherically symmetric Vaidya spacetime. Einstein's equations for this model can be obtained as equations of motion of a two-dimensional field theory. We discuss the transformations leaving invariant such equations of motion. These are given by two... |
gr-qc/0404127 | Llu\'is Bel | Ll. Bel | Light Tides and the Kennedy-Thorndike experiments | 14 pages | null | null | null | gr-qc | null | We model the system Earth-Moon-Sun from the point of view of a frame of
reference co-moving with the Earth and we derive a detailed prediction of the
outcome of future Kennedy-Thorndike's type experiments to be seen as light
tides.
| [
{
"created": "Fri, 30 Apr 2004 10:19:51 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bel",
"Ll.",
""
]
] | We model the system Earth-Moon-Sun from the point of view of a frame of reference co-moving with the Earth and we derive a detailed prediction of the outcome of future Kennedy-Thorndike's type experiments to be seen as light tides. |
1007.0851 | Niccolo' Loret | Giovanni Amelino-Camelia, Niccolo' Loret, Gianluca Mandanici, Flavio
Mercati | Gravity in quantum spacetime | This essay received honorable mention in the Gravity Research
Foundation 2010 Awards for Essays on Gravitation | Int.J.Mod.Phys.D19:2385-2392,2010 | 10.1142/S0218271810018451 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The literature on quantum-gravity-inspired scenarios for the quantization of
spacetime has so far focused on particle-physics-like studies. This is partly
justified by the present limitations of our understanding of quantum-gravity
theories, but we here argue that valuable insight can be gained through
semi-heuristic... | [
{
"created": "Tue, 6 Jul 2010 10:15:15 GMT",
"version": "v1"
}
] | 2011-01-17 | [
[
"Amelino-Camelia",
"Giovanni",
""
],
[
"Loret",
"Niccolo'",
""
],
[
"Mandanici",
"Gianluca",
""
],
[
"Mercati",
"Flavio",
""
]
] | The literature on quantum-gravity-inspired scenarios for the quantization of spacetime has so far focused on particle-physics-like studies. This is partly justified by the present limitations of our understanding of quantum-gravity theories, but we here argue that valuable insight can be gained through semi-heuristic a... |
gr-qc/9904008 | Roh Suan Tung | Roh Suan Tung (Chicago) | Gravitation as a Supersymmetric Gauge Theory | 11 pages, accepted for publication in Physics Letters A | Phys.Lett. A264 (2000) 341-345 | 10.1016/S0375-9601(99)00845-2 | null | gr-qc hep-th | null | We propose a gauge theory of gravitation. The gauge potential is a connection
of the Super SL(2,C) group. A MacDowell-Mansouri type of action is proposed
where the action is quadratic in the Super SL(2,C) curvature and depends purely
on gauge connection. By breaking the symmetry of the Super SL(2,C) topological
gauge... | [
{
"created": "Mon, 5 Apr 1999 16:03:39 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Jun 1999 21:09:26 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Dec 1999 01:47:18 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Tung",
"Roh Suan",
"",
"Chicago"
]
] | We propose a gauge theory of gravitation. The gauge potential is a connection of the Super SL(2,C) group. A MacDowell-Mansouri type of action is proposed where the action is quadratic in the Super SL(2,C) curvature and depends purely on gauge connection. By breaking the symmetry of the Super SL(2,C) topological gauge t... |
1811.07639 | Naqing Xie | Patryk Mach, Yaohua Wang, Naqing Xie | Construction of vacuum initial data by the conformally covariant split
system | null | Class. Quantum Grav. 36(2019)145001(23pp) | 10.1088/1361-6382/ab2781 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the implicit function theorem, we prove existence of solutions of the
so-called conformally covariant split system on compact 3-dimensional
Riemannian manifolds. They give rise to non-Constant Mean Curvature (non-CMC)
vacuum initial data for the Einstein equations. We investigate the conformally
covariant split... | [
{
"created": "Mon, 19 Nov 2018 12:15:58 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jun 2019 13:11:46 GMT",
"version": "v2"
}
] | 2019-06-24 | [
[
"Mach",
"Patryk",
""
],
[
"Wang",
"Yaohua",
""
],
[
"Xie",
"Naqing",
""
]
] | Using the implicit function theorem, we prove existence of solutions of the so-called conformally covariant split system on compact 3-dimensional Riemannian manifolds. They give rise to non-Constant Mean Curvature (non-CMC) vacuum initial data for the Einstein equations. We investigate the conformally covariant split s... |
1401.3275 | Luca Fabbri | Luca Fabbri | Torsion-Gravity for Dirac fields and their effective phenomenology | 6 pages | Mod.Phys.Lett.A29:1450133,2014 | 10.1142/S0217732314501338 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We will consider the torsional completion of gravity for a background filled
with Dirac matter fields, studying the weak-gravitational non-relativistic
approximation, in view of an assessment about their effective phenomenology: we
discuss how the torsionally-induced non-linear interactions among fermion
fields in th... | [
{
"created": "Tue, 14 Jan 2014 18:38:10 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Sep 2014 17:16:48 GMT",
"version": "v2"
}
] | 2014-09-03 | [
[
"Fabbri",
"Luca",
""
]
] | We will consider the torsional completion of gravity for a background filled with Dirac matter fields, studying the weak-gravitational non-relativistic approximation, in view of an assessment about their effective phenomenology: we discuss how the torsionally-induced non-linear interactions among fermion fields in this... |
0803.2651 | Everton Murilo Carvalho Abreu | E. M. C. Abreu and C. M. L. dos Reis | An analytical description for the cosmological constant | 10 pages. RevTex | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | From the principles of quantum cosmologies we can justify the reason for an
inverse-square law for the cosmological constant with no conflict with
observations. Although this general expression for $\Lambda$ is well known in
the literature, in this work we introduce some analytical solutions for the
scale factor diff... | [
{
"created": "Tue, 18 Mar 2008 15:03:46 GMT",
"version": "v1"
}
] | 2008-03-19 | [
[
"Abreu",
"E. M. C.",
""
],
[
"Reis",
"C. M. L. dos",
""
]
] | From the principles of quantum cosmologies we can justify the reason for an inverse-square law for the cosmological constant with no conflict with observations. Although this general expression for $\Lambda$ is well known in the literature, in this work we introduce some analytical solutions for the scale factor differ... |
2206.11013 | Nicolas Lecoeur | Eugeny Babichev, Christos Charmousis, Mokhtar Hassaine, Nicolas
Lecoeur | Conformally coupled theories and their deformed compact objects: from
black holes, radiating spacetimes to eternal wormholes | null | null | 10.1103/PhysRevD.106.064039 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a higher order conformally coupled scalar tensor theory endowed with
a covariant geometric constraint relating the scalar curvature with the
Gauss-Bonnet scalar. It is a particular Horndeski theory including a canonical
kinetic term but without shift or parity symmetry for the scalar. The theory
also stems f... | [
{
"created": "Wed, 22 Jun 2022 12:27:41 GMT",
"version": "v1"
}
] | 2022-10-05 | [
[
"Babichev",
"Eugeny",
""
],
[
"Charmousis",
"Christos",
""
],
[
"Hassaine",
"Mokhtar",
""
],
[
"Lecoeur",
"Nicolas",
""
]
] | We study a higher order conformally coupled scalar tensor theory endowed with a covariant geometric constraint relating the scalar curvature with the Gauss-Bonnet scalar. It is a particular Horndeski theory including a canonical kinetic term but without shift or parity symmetry for the scalar. The theory also stems fro... |
1403.7615 | Mohammad Nouri-Zonoz | M. Nouri-Zonoz and H. Ramezani-Aval | Fermi coordinates and modified Franklin transformation : A comparative
study on rotational phenomena | 21 pages, 2 figures, replaced with the published version | Eur. Phys. J. C (2014) 74:3128 | 10.1140/epjc/s10052-014-3128-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Employing a relativistic rotational transformation to study and analyze
rotational phenomena, instead of the rotational transformations based on
consecutive Lorentz transformations and Fermi coordinates, leads to different
predictions. In this article, after a comparative study between Fermi metric of
a uniformly rot... | [
{
"created": "Sat, 29 Mar 2014 10:36:42 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Dec 2014 14:04:51 GMT",
"version": "v2"
}
] | 2015-01-07 | [
[
"Nouri-Zonoz",
"M.",
""
],
[
"Ramezani-Aval",
"H.",
""
]
] | Employing a relativistic rotational transformation to study and analyze rotational phenomena, instead of the rotational transformations based on consecutive Lorentz transformations and Fermi coordinates, leads to different predictions. In this article, after a comparative study between Fermi metric of a uniformly rotat... |
gr-qc/9807071 | Daniel STAF Tilley | Daniel Tilley and Roy Maartens (University of Portsmouth) | Perturbations in inflationary cosmologies with smooth exit | 11 pages, latex, Accepted for publication in JMP | J.Math.Phys. 39 (1998) 5491-5501 | 10.1063/1.532546 | null | gr-qc | null | We give a comprehensive analysis of how scalar and tensor perturbations
evolve in cosmologies with a smooth transition from power-law-like and de
Sitter-like inflation to a radiation era. Analytic forms for the super-horizon
and sub-horizon perturbations in the inflationary and radiation dominated eras
are found.
| [
{
"created": "Mon, 27 Jul 1998 14:40:16 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Tilley",
"Daniel",
"",
"University of Portsmouth"
],
[
"Maartens",
"Roy",
"",
"University of Portsmouth"
]
] | We give a comprehensive analysis of how scalar and tensor perturbations evolve in cosmologies with a smooth transition from power-law-like and de Sitter-like inflation to a radiation era. Analytic forms for the super-horizon and sub-horizon perturbations in the inflationary and radiation dominated eras are found. |
1611.02647 | Henry Stoltenberg | Shengqiao Luo, Henry Stoltenberg and Andreas Albrecht | Multipartite Entanglement and Firewalls | 12 pages, 2 figures. V2: Final version accepted for publication in
PRD. Changes have been made to improve our discussion. No changes have been
made to the ideas or technical work presented. Section VI (from V1) has been
separated into two (adjacent) sections and the text in each has been improved
for clarity | Phys. Rev. D 95, 064039 (2017) | 10.1103/PhysRevD.95.064039 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes offer an exciting area to explore the nature of quantum gravity.
The classic work on Hawking radiation indicates that black holes should decay
via quantum effects, but our ideas about how this might work at a technical
level are incomplete. Recently Almheiri-Marolf-Polchinski-Sully (AMPS) have
noted an ap... | [
{
"created": "Tue, 8 Nov 2016 18:28:53 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Feb 2017 23:17:19 GMT",
"version": "v2"
}
] | 2017-03-29 | [
[
"Luo",
"Shengqiao",
""
],
[
"Stoltenberg",
"Henry",
""
],
[
"Albrecht",
"Andreas",
""
]
] | Black holes offer an exciting area to explore the nature of quantum gravity. The classic work on Hawking radiation indicates that black holes should decay via quantum effects, but our ideas about how this might work at a technical level are incomplete. Recently Almheiri-Marolf-Polchinski-Sully (AMPS) have noted an appa... |
2111.04954 | Pyotr Tsyba | P. Tsyba, O. Razina, N. Suikimbayeva | Analysis cosmological tachyon and fermion model and observation data
constraints | null | null | 10.1142/S0218271821501145 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we investigate a cosmological model with the tachyon and fermion
fields with barotropic equation of state, where pressure $p$, energy density
$\rho$ and barotropic index $\gamma$ are related by the relation
$p=(\gamma-1)\rho$. We applied the tachyonozation method which allows to
consider cosmological mod... | [
{
"created": "Tue, 9 Nov 2021 04:48:53 GMT",
"version": "v1"
}
] | 2021-11-10 | [
[
"Tsyba",
"P.",
""
],
[
"Razina",
"O.",
""
],
[
"Suikimbayeva",
"N.",
""
]
] | In this work we investigate a cosmological model with the tachyon and fermion fields with barotropic equation of state, where pressure $p$, energy density $\rho$ and barotropic index $\gamma$ are related by the relation $p=(\gamma-1)\rho$. We applied the tachyonozation method which allows to consider cosmological model... |
2407.08396 | Yu-Xiao Liu | Jia-Zhou Liu, Wen-Di Guo, Shao-Wen Wei, Yu-Xiao Liu | Charged spherically symmetric and slowly rotating charged black hole
solutions in bumblebee gravity | 25 pages, 6 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we present charged spherically symmetric black hole solutions
and slowly rotating charged solutions in bumblebee gravity with and without a
cosmological constant. The static spherically symmetric solutions describe the
Reissner-Nordstr\"om-like black hole and ReissnerNordstr\"om-(anti) de
Sitter-like b... | [
{
"created": "Thu, 11 Jul 2024 11:02:18 GMT",
"version": "v1"
}
] | 2024-07-12 | [
[
"Liu",
"Jia-Zhou",
""
],
[
"Guo",
"Wen-Di",
""
],
[
"Wei",
"Shao-Wen",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | In this paper, we present charged spherically symmetric black hole solutions and slowly rotating charged solutions in bumblebee gravity with and without a cosmological constant. The static spherically symmetric solutions describe the Reissner-Nordstr\"om-like black hole and ReissnerNordstr\"om-(anti) de Sitter-like bla... |
gr-qc/0312004 | Dan Brown | Daniel Brown | A Graph method for mapping changes in temporal and spatial phenomena
with relativistic consequences | 26 pages. 4 figures | null | null | null | gr-qc | null | A cellular automata approach using a Directed Cyclic Graph is used to model
interrelationships of fluctuating time, state and space. This model predicts
phenomena including a constant and maximum speed at which any moving entity can
travel, time dilation effects in accordance with special relativity,
calculation for ... | [
{
"created": "Sun, 30 Nov 2003 20:18:26 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Mar 2004 16:26:00 GMT",
"version": "v2"
},
{
"created": "Thu, 12 Aug 2004 11:00:02 GMT",
"version": "v3"
},
{
"created": "Tue, 8 Feb 2005 15:18:27 GMT",
"version": "v4"
},
{
"cre... | 2007-05-23 | [
[
"Brown",
"Daniel",
""
]
] | A cellular automata approach using a Directed Cyclic Graph is used to model interrelationships of fluctuating time, state and space. This model predicts phenomena including a constant and maximum speed at which any moving entity can travel, time dilation effects in accordance with special relativity, calculation for th... |
2010.13157 | Andrew A. Geraci | Nancy Aggarwal, George P. Winstone, Mae Teo, Masha Baryakhtar, Shane
L. Larson, Vicky Kalogera, Andrew A. Geraci | Searching for new physics with a levitated-sensor-based
gravitational-wave detector | 7 pages including references, 3 figures | null | null | null | gr-qc hep-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Levitated Sensor Detector (LSD) is a compact resonant gravitational-wave
(GW) detector based on optically trapped dielectric particles that is under
construction. The LSD sensitivity has more favorable frequency scaling at high
frequencies compared to laser interferometer detectors such as LIGO. We propose
a meth... | [
{
"created": "Sun, 25 Oct 2020 16:33:12 GMT",
"version": "v1"
}
] | 2020-10-27 | [
[
"Aggarwal",
"Nancy",
""
],
[
"Winstone",
"George P.",
""
],
[
"Teo",
"Mae",
""
],
[
"Baryakhtar",
"Masha",
""
],
[
"Larson",
"Shane L.",
""
],
[
"Kalogera",
"Vicky",
""
],
[
"Geraci",
"Andrew A.",
""
]
] | The Levitated Sensor Detector (LSD) is a compact resonant gravitational-wave (GW) detector based on optically trapped dielectric particles that is under construction. The LSD sensitivity has more favorable frequency scaling at high frequencies compared to laser interferometer detectors such as LIGO. We propose a method... |
gr-qc/9508032 | null | Peter D. D'Eath and Giampiero Esposito | The Effect of Boundaries in One-Loop Quantum Cosmology | 6 pages, plain-tex, published in Proceedings of the IX Italian
Conference on General Relativity and Gravitational Physics, editors R. Cianci
et al., 1991, pp 644-647 (Singapore: World Scientific) | null | null | DAMTP R-90/20 | gr-qc | null | The problem of boundary conditions in a supersymmetric theory of quantum
cosmology is studied, with application to the one-loop prefactor in the quantum
amplitude. Our background cosmological model is flat Euclidean space bounded by
a three-sphere, and our calculations are based on the generalized Riemann
zeta-functi... | [
{
"created": "Mon, 14 Aug 1995 17:33:37 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"D'Eath",
"Peter D.",
""
],
[
"Esposito",
"Giampiero",
""
]
] | The problem of boundary conditions in a supersymmetric theory of quantum cosmology is studied, with application to the one-loop prefactor in the quantum amplitude. Our background cosmological model is flat Euclidean space bounded by a three-sphere, and our calculations are based on the generalized Riemann zeta-function... |
1405.2189 | Rahim Alhamzawi | Ahmed Alhamzawi and Rahim Alhamzawi | Generalized GHY term for f(R) Gravity | 3 pages, 0 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A generalization to the Gibbons-Hawking-York boundary term for metric $f(R)$
gravity theories is introduced. A redefinition of the Gibbons-Hawking-York term
is proposed. The proposed new definition is used to derive a consistent set of
field equations and is extended to metric $f(R)$ gravity theories. The surface
ter... | [
{
"created": "Fri, 9 May 2014 09:44:05 GMT",
"version": "v1"
},
{
"created": "Mon, 12 May 2014 17:27:44 GMT",
"version": "v2"
}
] | 2014-05-13 | [
[
"Alhamzawi",
"Ahmed",
""
],
[
"Alhamzawi",
"Rahim",
""
]
] | A generalization to the Gibbons-Hawking-York boundary term for metric $f(R)$ gravity theories is introduced. A redefinition of the Gibbons-Hawking-York term is proposed. The proposed new definition is used to derive a consistent set of field equations and is extended to metric $f(R)$ gravity theories. The surface terms... |
gr-qc/0004042 | Sean A. Hayward | Sean A. Hayward | Gravitational energy as Noether charge | 4 pages, revtex | null | null | null | gr-qc | null | A definition of gravitational energy is proposed for any theory described by
a diffeomorphism-invariant Lagrangian. The mathematical structure is a Noether-
current construction of Wald involving the boundary term in the action, but
here it is argued that the physical interpretation of current conservation is
conserv... | [
{
"created": "Thu, 13 Apr 2000 17:59:12 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Hayward",
"Sean A.",
""
]
] | A definition of gravitational energy is proposed for any theory described by a diffeomorphism-invariant Lagrangian. The mathematical structure is a Noether- current construction of Wald involving the boundary term in the action, but here it is argued that the physical interpretation of current conservation is conservat... |
1608.03164 | Valerio Faraoni | Valerio Faraoni and Marianne Lapierre-Leonard (Bishop's University) | Beyond lensing by the cosmological constant | 4 pages. Added some discussion and a few references, matches version
accepted in Phys. Rev. D | Phys. Rev. D 95, 023509 (2017) | 10.1103/PhysRevD.95.023509 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The long-standing problem of whether the cosmological constant affects
directly the deflection of light caused by a gravitational lens is
reconsidered. We use a new approach based on the Hawking quasilocal mass of a
sphere grazed by light rays and on its splitting into local and cosmological
parts. Previous literatur... | [
{
"created": "Wed, 10 Aug 2016 13:26:06 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Jan 2017 18:37:42 GMT",
"version": "v2"
}
] | 2017-01-25 | [
[
"Faraoni",
"Valerio",
"",
"Bishop's University"
],
[
"Lapierre-Leonard",
"Marianne",
"",
"Bishop's University"
]
] | The long-standing problem of whether the cosmological constant affects directly the deflection of light caused by a gravitational lens is reconsidered. We use a new approach based on the Hawking quasilocal mass of a sphere grazed by light rays and on its splitting into local and cosmological parts. Previous literature ... |
1706.06777 | Chandra Prakash Singh | Milan Srivastava and C.P.Singh | Holographic Dark Energy Model in Brans-Dicke Theory with Future Event
Horizon | 11 Pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the dynamics of non-interacting and interacting
holographic dark energy models in the framework of Brans-Dicke theory. As
system's infra-red cut-off we consider the future event horizon. The motivation
of this work is to use the logarithmic form of the Brans-Dicke scalar field,
$\phi \propto l... | [
{
"created": "Wed, 21 Jun 2017 08:03:59 GMT",
"version": "v1"
}
] | 2017-06-22 | [
[
"Srivastava",
"Milan",
""
],
[
"Singh",
"C. P.",
""
]
] | In this paper, we study the dynamics of non-interacting and interacting holographic dark energy models in the framework of Brans-Dicke theory. As system's infra-red cut-off we consider the future event horizon. The motivation of this work is to use the logarithmic form of the Brans-Dicke scalar field, $\phi \propto ln(... |
gr-qc/0504141 | Pawel O. Mazur | Jun Suzuki | Motion of Classical Impurities in the Homogeneous Bose-Einstein
Condensate | revtex4, 25 pages, 2 figures | null | null | null | gr-qc quant-ph | null | Motion of classical point-like impurities in the homogeneous Einstein
condensate of bosons is studied in the framework of second quantization method.
A toy model is proposed and its general solution within the Bogoliubov
approximation is obtained. The effective Minkowski space-time structure arises
naturally in this ... | [
{
"created": "Thu, 28 Apr 2005 23:35:21 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jun 2005 14:51:55 GMT",
"version": "v2"
}
] | 2010-12-09 | [
[
"Suzuki",
"Jun",
""
]
] | Motion of classical point-like impurities in the homogeneous Einstein condensate of bosons is studied in the framework of second quantization method. A toy model is proposed and its general solution within the Bogoliubov approximation is obtained. The effective Minkowski space-time structure arises naturally in this no... |
2312.11430 | Aaron Held | Astrid Eichhorn, Pedro G. S. Fernandes, Aaron Held, Hector O. Silva | Breaking black-hole uniqueness at supermassive scales | 5 pages, 3 figures + supplemental material | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In general relativity, all vacuum black holes are described by the Kerr
solution. Beyond general relativity, there is a prevailing expectation that
deviations from the Kerr solution increase with the horizon curvature. We
challenge this expectation by showing that, in a scalar-Gauss-Bonnet theory,
black holes scalari... | [
{
"created": "Mon, 18 Dec 2023 18:33:56 GMT",
"version": "v1"
}
] | 2023-12-19 | [
[
"Eichhorn",
"Astrid",
""
],
[
"Fernandes",
"Pedro G. S.",
""
],
[
"Held",
"Aaron",
""
],
[
"Silva",
"Hector O.",
""
]
] | In general relativity, all vacuum black holes are described by the Kerr solution. Beyond general relativity, there is a prevailing expectation that deviations from the Kerr solution increase with the horizon curvature. We challenge this expectation by showing that, in a scalar-Gauss-Bonnet theory, black holes scalarize... |
1205.5251 | Christian Corda cordac | Christian Corda | Effective temperature, Hawking radiation and quasinormal modes | This essay received an honorable mention in the 2012 Essay
Competition of the Gravity Research Foundation. 11 pages, founded on the
research paper JHEP 1108, 101 (2011), arXiv:1107.5334 | Int. Journ. Mod. Phys. D 21, 1242023 (2012) | 10.1142/S0218271812420230 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Parikh and Wilczek have shown that Hawking radiation's spectrum cannot be
strictly thermal. Such a non-strictly thermal character implies that the
spectrum is also not strictly continuous and thus generates a natural
correspondence between Hawking radiation and black hole's quasinormal modes.
This issue endorses the ... | [
{
"created": "Thu, 17 May 2012 08:03:05 GMT",
"version": "v1"
}
] | 2012-10-30 | [
[
"Corda",
"Christian",
""
]
] | Parikh and Wilczek have shown that Hawking radiation's spectrum cannot be strictly thermal. Such a non-strictly thermal character implies that the spectrum is also not strictly continuous and thus generates a natural correspondence between Hawking radiation and black hole's quasinormal modes. This issue endorses the id... |
1412.5665 | Genly Le\'on | Genly Leon | Qualitative analysis and characterization of two cosmologies including
scalar fields | PhD thesis, Universidad Central Marta Abreu de Las Villas, Cuba,
March 2010. 141 pages, 4 figures, in Spanish | null | null | null | gr-qc hep-th math.DS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of dark energy can be roughly stated as the proposition and
validation of a cosmological model that can explain the phenomenon of the
accelerated expansion of the Universe. This problem is an open discussion topic
in modern physics. One of the most common approaches is that of the "Dark
Energy" (DE), a ma... | [
{
"created": "Wed, 17 Dec 2014 22:53:05 GMT",
"version": "v1"
}
] | 2014-12-19 | [
[
"Leon",
"Genly",
""
]
] | The problem of dark energy can be roughly stated as the proposition and validation of a cosmological model that can explain the phenomenon of the accelerated expansion of the Universe. This problem is an open discussion topic in modern physics. One of the most common approaches is that of the "Dark Energy" (DE), a matt... |
2208.12872 | Noah Wolfe | Noah E. Wolfe, Colm Talbot, and Jacob Golomb | Accelerating Tests of General Relativity with Gravitational-Wave Signals
using Hybrid Sampling | 14 pages, 13 figures; modifications in response to referee report,
including comparison to other MCMC initialization methods | null | 10.1103/PhysRevD.107.104056 | null | gr-qc astro-ph.HE astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | The Advanced LIGO/Virgo interferometers have observed $\sim 100$
gravitational-wave transients enabling new questions to be answered about
relativity, astrophysics, and cosmology. However, many of our current
procedures for computing these constraints will not scale well with the
increased size of future transient ca... | [
{
"created": "Fri, 26 Aug 2022 21:34:34 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Mar 2023 13:54:46 GMT",
"version": "v2"
}
] | 2023-06-14 | [
[
"Wolfe",
"Noah E.",
""
],
[
"Talbot",
"Colm",
""
],
[
"Golomb",
"Jacob",
""
]
] | The Advanced LIGO/Virgo interferometers have observed $\sim 100$ gravitational-wave transients enabling new questions to be answered about relativity, astrophysics, and cosmology. However, many of our current procedures for computing these constraints will not scale well with the increased size of future transient cata... |
2012.01317 | Colm Talbot | Colm Talbot and Eric Thrane | Fast, flexible, and accurate evaluation of gravitational-wave Malmquist
bias with machine learning | 11 pages, 6 figures, accompanying code at
https://github.com/ColmTalbot/gmm_sensitivity_estimation | null | null | null | gr-qc astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many astronomical surveys are limited by the brightness of the sources, and
gravitational-wave searches are no exception. The detectability of
gravitational waves from merging binaries is affected by the mass and spin of
the constituent compact objects. To perform unbiased inference on the
distribution of compact bin... | [
{
"created": "Wed, 2 Dec 2020 16:42:44 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jun 2021 21:35:43 GMT",
"version": "v2"
},
{
"created": "Sun, 2 Jan 2022 14:20:39 GMT",
"version": "v3"
}
] | 2022-01-04 | [
[
"Talbot",
"Colm",
""
],
[
"Thrane",
"Eric",
""
]
] | Many astronomical surveys are limited by the brightness of the sources, and gravitational-wave searches are no exception. The detectability of gravitational waves from merging binaries is affected by the mass and spin of the constituent compact objects. To perform unbiased inference on the distribution of compact binar... |
1805.03582 | Jose M. M. Senovilla | Jos\'e M. M. Senovilla | Equations for general shells | 32 pages, no figures. New paragraph and new footnote, plus some added
references. Version to be published | null | 10.1007/JHEP11(2018)134 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The complete set of (field) equations for shells of arbitrary, even changing,
causal character are derived in arbitrary dimension. New equations that seem to
have never been considered in the literature emerge, even in the traditional
cases of everywhere non-null, or everywhere null, shells. In the latter case
there ... | [
{
"created": "Wed, 9 May 2018 15:17:17 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Nov 2018 01:27:25 GMT",
"version": "v2"
}
] | 2018-12-05 | [
[
"Senovilla",
"José M. M.",
""
]
] | The complete set of (field) equations for shells of arbitrary, even changing, causal character are derived in arbitrary dimension. New equations that seem to have never been considered in the literature emerge, even in the traditional cases of everywhere non-null, or everywhere null, shells. In the latter case there ar... |
2207.03591 | Cian Roche | Cian Roche, Amir Babak Aazami, Carla Cederbaum | Exact Parallel Waves in General Relativity | 66 pages; review; updated version with explicit nomenclature summary
and additional references | null | 10.1007/s10714-023-03083-x | null | gr-qc math.DG | http://creativecommons.org/licenses/by/4.0/ | We conduct a review of the basic definitions and the principal results in the
study of wavelike spacetimes, that is spacetimes whose metric models massless
radiation moving at the speed of light, focusing in particular on those
geometries with parallel rays. In particular, we motivate and connect their
various defini... | [
{
"created": "Thu, 7 Jul 2022 21:39:48 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Nov 2022 05:43:55 GMT",
"version": "v2"
}
] | 2023-03-15 | [
[
"Roche",
"Cian",
""
],
[
"Aazami",
"Amir Babak",
""
],
[
"Cederbaum",
"Carla",
""
]
] | We conduct a review of the basic definitions and the principal results in the study of wavelike spacetimes, that is spacetimes whose metric models massless radiation moving at the speed of light, focusing in particular on those geometries with parallel rays. In particular, we motivate and connect their various definiti... |
1905.07968 | Jinsong Yang | Xiaojun Gao, Shupeng Song, Jinsong Yang | Light bending and gravitational lensing in Brans-Dicke theory | 8 pages, 3 figures, version published in PLB | Physics Letters B 795 (2019) 144-151 | 10.1016/j.physletb.2019.06.028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As an important candidate theory of gravity, Brans-Dicke theory has been
widely studied. In this paper, we investigate light bending and gravitational
lensing by compact objects in Brans-Dicke theory in weak gravitational field.
Firstly, we present a general formalism for calculating higher-order
corrections to light... | [
{
"created": "Mon, 20 May 2019 10:03:22 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Jun 2019 09:18:06 GMT",
"version": "v2"
}
] | 2019-06-25 | [
[
"Gao",
"Xiaojun",
""
],
[
"Song",
"Shupeng",
""
],
[
"Yang",
"Jinsong",
""
]
] | As an important candidate theory of gravity, Brans-Dicke theory has been widely studied. In this paper, we investigate light bending and gravitational lensing by compact objects in Brans-Dicke theory in weak gravitational field. Firstly, we present a general formalism for calculating higher-order corrections to light b... |
gr-qc/0203100 | Matthew Frank | Matthew Frank | Einstein's Equation in Pictures | 5 pages. Also available, with associated Mathematica code, at
http://zaphod.uchicago.edu/~mfrank/GR/einpics.html | null | null | null | gr-qc | null | This paper gives a self-contained, elementary, and largely pictorial
statement of Einstein's equation.
| [
{
"created": "Thu, 28 Mar 2002 18:08:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Frank",
"Matthew",
""
]
] | This paper gives a self-contained, elementary, and largely pictorial statement of Einstein's equation. |
1405.7665 | Xu Wei | Wei Xu and Liu Zhao | Critical phenomena of static charged AdS black holes in conformal
gravity | 16 pages, 3 figures; published version | Physics Letters B 736 (2014) 214-220 | 10.1016/j.physletb.2014.07.019 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The extended thermodynamics of static charged AdS black holes in conformal
gravity is analyzed. The $P-V$ criticality of these black holes has some
unusual features. There exists a single critical point with critical
temperature $T_c$ and critical pressure $P_c$. At fixed $T>T_c$ (or at fixed
$P>P_c$), there are two ... | [
{
"created": "Thu, 29 May 2014 19:19:27 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Aug 2014 13:31:14 GMT",
"version": "v2"
}
] | 2014-08-19 | [
[
"Xu",
"Wei",
""
],
[
"Zhao",
"Liu",
""
]
] | The extended thermodynamics of static charged AdS black holes in conformal gravity is analyzed. The $P-V$ criticality of these black holes has some unusual features. There exists a single critical point with critical temperature $T_c$ and critical pressure $P_c$. At fixed $T>T_c$ (or at fixed $P>P_c$), there are two ze... |
1808.06772 | Gauranga Samanta | Koijam Manihar Singh, Gauranga C. Samanta | Dark energy in spherically symmetric universe coupled with Brans-Dicke
scalar field | 15 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The phenomenon of dark energy and its manifestations are studied in a
spherically symmetric universe considering the Brans-Dicke scalar tensor
theory. In the first model the dark energy behaves like a phantom type and in
such a universe the existence of negative time is validated with an indication
that our universe ... | [
{
"created": "Tue, 21 Aug 2018 05:29:40 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Mar 2019 11:18:48 GMT",
"version": "v2"
}
] | 2019-03-29 | [
[
"Singh",
"Koijam Manihar",
""
],
[
"Samanta",
"Gauranga C.",
""
]
] | The phenomenon of dark energy and its manifestations are studied in a spherically symmetric universe considering the Brans-Dicke scalar tensor theory. In the first model the dark energy behaves like a phantom type and in such a universe the existence of negative time is validated with an indication that our universe st... |
2005.07011 | Dong-han Yeom | Pisin Chen, Misao Sasaki, Dong-han Yeom | A path(-integral) toward non-perturbative effects in Hawking radiation | 5 pages, 2 figures | Int.J.Mod.Phys. D29, 2050086 (2020) | 10.1142/S0218271820500868 | YITP-20-36 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hawking's seminal discovery of black hole evaporation was based on the
semi-classical, perturbative method. Whether black hole evaporation may result
in the loss of information remains undetermined. The solution to this paradox
would most likely rely on the knowledge of the end-life of the evaporation,
which evidentl... | [
{
"created": "Thu, 14 May 2020 14:27:33 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Sep 2020 23:13:01 GMT",
"version": "v2"
}
] | 2020-09-30 | [
[
"Chen",
"Pisin",
""
],
[
"Sasaki",
"Misao",
""
],
[
"Yeom",
"Dong-han",
""
]
] | Hawking's seminal discovery of black hole evaporation was based on the semi-classical, perturbative method. Whether black hole evaporation may result in the loss of information remains undetermined. The solution to this paradox would most likely rely on the knowledge of the end-life of the evaporation, which evidently ... |
2304.02482 | Pardyumn Kumar Sahoo | Lakhan V. Jaybhaye, Snehasish Bhattacharjee, P.K. Sahoo | Baryogenesis in $f(R,L_m)$ gravity | Physics of the Dark Universe published version | Physics of the Dark Universe 40 (2023) 101223 | 10.1016/j.dark.2023.101223 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | This paper aims to recreate the gravitational baryogenesis epoch in the
framework of the $f(R,L_m)$ theory of gravity, where $R$ and $L_m$ are the
curvature scalar and the matter Langragian, respectively. In particular, we
examine the model, $f(R,L_m) = \frac{R}{2} + L_m ^{\alpha} + \zeta$, under the
supposition that... | [
{
"created": "Tue, 4 Apr 2023 12:50:08 GMT",
"version": "v1"
}
] | 2023-04-06 | [
[
"Jaybhaye",
"Lakhan V.",
""
],
[
"Bhattacharjee",
"Snehasish",
""
],
[
"Sahoo",
"P. K.",
""
]
] | This paper aims to recreate the gravitational baryogenesis epoch in the framework of the $f(R,L_m)$ theory of gravity, where $R$ and $L_m$ are the curvature scalar and the matter Langragian, respectively. In particular, we examine the model, $f(R,L_m) = \frac{R}{2} + L_m ^{\alpha} + \zeta$, under the supposition that t... |
gr-qc/9808044 | Clive Wells | Clive G. Wells | Extending the Black Hole Uniqueness Theorems, I. Accelerating Black
Holes: The Ernst Solution and C-Metric | 47 pages, LaTeX (REVTeX), 4 postscript diagrams | null | null | DAMTP-1998-105 | gr-qc hep-th | null | We present black hole uniqueness theorems for the C-metric and Ernst
solution. The proof follows a similar strategy as that used to prove the
uniqueness of the Kerr-Newman solution, however the presence of an acceleration
horizon provides some critical differences. We also show how to derive the
Bunting/Mazur result ... | [
{
"created": "Sun, 16 Aug 1998 17:11:18 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wells",
"Clive G.",
""
]
] | We present black hole uniqueness theorems for the C-metric and Ernst solution. The proof follows a similar strategy as that used to prove the uniqueness of the Kerr-Newman solution, however the presence of an acceleration horizon provides some critical differences. We also show how to derive the Bunting/Mazur result (o... |
1604.06319 | Jesper M{\o}ller Grimstrup | Johannes Aastrup and Jesper M. Grimstrup | Quantum Holonomy Theory and Hilbert Space Representations | 13 pages | null | 10.1002/prop.201600101 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new formulation of quantum holonomy theory, which is a candidate
for a non-perturbative and background independent theory of quantum gravity
coupled to matter and gauge degrees of freedom. The new formulation is based on
a Hilbert space representation of the QHD(M) algebra, which is generated by
holonomy... | [
{
"created": "Thu, 21 Apr 2016 14:19:40 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Apr 2016 17:32:52 GMT",
"version": "v2"
},
{
"created": "Mon, 9 May 2016 08:49:51 GMT",
"version": "v3"
}
] | 2016-12-21 | [
[
"Aastrup",
"Johannes",
""
],
[
"Grimstrup",
"Jesper M.",
""
]
] | We present a new formulation of quantum holonomy theory, which is a candidate for a non-perturbative and background independent theory of quantum gravity coupled to matter and gauge degrees of freedom. The new formulation is based on a Hilbert space representation of the QHD(M) algebra, which is generated by holonomy-d... |
1506.09161 | Mahouton J. Stephane Houndjo Dr | S. B. Nassur, M. J. S. Houndjo, A. V. Kpadonou, M. E. Rodrigues and J.
Tossa | From the early to the late time universe within $f(T,\mathcal{T})$
gravity | 23 pages | Astrophys Space Sci (2015) 360:60 | 10.1007/s10509-015-2578-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we perform the reconstruction scheme of the gravitational
action within $f(T,\mathcal{T})$ gravity, where $T$ and $\mathcal{T}$ denote
the torsion scalar and the trace of the energy momentum tensor, respectively.
We particularly focus our attention on the case where the algebraic function
$f(T,\mathcal{... | [
{
"created": "Wed, 17 Jun 2015 11:02:13 GMT",
"version": "v1"
}
] | 2016-01-21 | [
[
"Nassur",
"S. B.",
""
],
[
"Houndjo",
"M. J. S.",
""
],
[
"Kpadonou",
"A. V.",
""
],
[
"Rodrigues",
"M. E.",
""
],
[
"Tossa",
"J.",
""
]
] | In this paper we perform the reconstruction scheme of the gravitational action within $f(T,\mathcal{T})$ gravity, where $T$ and $\mathcal{T}$ denote the torsion scalar and the trace of the energy momentum tensor, respectively. We particularly focus our attention on the case where the algebraic function $f(T,\mathcal{T}... |
1301.7423 | Javier E. Cuch\'i | Javier E. Cuch\'i, Alfred Molina, Eduardo Ruiz | Comparing results for a global metric from analytical perturbation
theory and a numerical code | 4 pages, 2 figures, 1 table. Contribution to the conference
proceedings of "Progress in Mathematical Relativity, Gravitation and
Cosmology", ERE2012, University of Minho, Portugal | null | null | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compare the results obtained from analytical perturbation theory and the
AKM numerical code for an axistationary spacetime built from matching a
rotating perfect fluid interior with the equation of state $\epsilon-3p=4B$ of
the simple MIT bag model and an asymptotically flat exterior. We discuss the
behaviour of t... | [
{
"created": "Wed, 30 Jan 2013 21:00:05 GMT",
"version": "v1"
}
] | 2013-02-01 | [
[
"Cuchí",
"Javier E.",
""
],
[
"Molina",
"Alfred",
""
],
[
"Ruiz",
"Eduardo",
""
]
] | We compare the results obtained from analytical perturbation theory and the AKM numerical code for an axistationary spacetime built from matching a rotating perfect fluid interior with the equation of state $\epsilon-3p=4B$ of the simple MIT bag model and an asymptotically flat exterior. We discuss the behaviour of the... |
1210.3731 | Jose M. M. Senovilla | Jos\'e M.M. Senovilla | On the stability operator for MOTS and the 'core' of Black Holes | 8 pages, no figures, contribution to the Proceedings of the
Conference "Relativity and Gravitation. 100 years after Einstein in Prague",
held in Prague, June 25-29, 2012 | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Small deformations of marginally (outer) trapped surfaces are considered by
using their stability operator. In the case of spherical symmetry, one can use
these deformations on any marginally trapped round sphere to prove several
interesting results. The concept of 'core' of a black hole is introduced: it is
a minima... | [
{
"created": "Sat, 13 Oct 2012 18:17:19 GMT",
"version": "v1"
}
] | 2012-10-16 | [
[
"Senovilla",
"José M. M.",
""
]
] | Small deformations of marginally (outer) trapped surfaces are considered by using their stability operator. In the case of spherical symmetry, one can use these deformations on any marginally trapped round sphere to prove several interesting results. The concept of 'core' of a black hole is introduced: it is a minimal ... |
gr-qc/0101038 | Salvatore Capozziello | S. Capozziello, G. Lambiase, C. Stornaiolo | Geometric classification of the torsion tensor in space-time | LATEX file, 18 pages, accepted for Publication in Annalen der Physik | Annalen Phys.10:713-727,2001 | 10.1002/1521-3889(200108)10:8<713::AID-ANDP713>3.0.CO;2-2 | null | gr-qc | null | Torsion appears in literature in quite different forms. Generally, spin is
considered to be the source of torsion, but there are several other
possibilities in which torsion emerges in different contexts. In some cases a
phenomenological counterpart is absent, in some other cases torsion arises from
sources without s... | [
{
"created": "Wed, 10 Jan 2001 12:27:33 GMT",
"version": "v1"
}
] | 2017-09-27 | [
[
"Capozziello",
"S.",
""
],
[
"Lambiase",
"G.",
""
],
[
"Stornaiolo",
"C.",
""
]
] | Torsion appears in literature in quite different forms. Generally, spin is considered to be the source of torsion, but there are several other possibilities in which torsion emerges in different contexts. In some cases a phenomenological counterpart is absent, in some other cases torsion arises from sources without spi... |
2011.03508 | Jan Steinhoff | Pawan Kumar Gupta, Jan Steinhoff, Tanja Hinderer | Relativistic effective action of dynamical gravitomagnetic tides for
slowly rotating neutron stars | 20 pages; v2: added time domain response/Love operator and discussion
of electric driving, minor typos corrected, submitted to journal; v3:
extended discussion; v4: published | Phys. Rev. Research 3, 013147 (2021) | 10.1103/PhysRevResearch.3.013147 | null | gr-qc astro-ph.HE astro-ph.SR hep-th | http://creativecommons.org/licenses/by/4.0/ | Gravitomagnetic quasi-normal modes of neutron stars are resonantly excited by
tidal effects during a binary inspiral, leading to a potentially measurable
effect in the gravitational-wave signal. We take an important step towards
incorporating these effects in waveform models by developing a relativistic
effective act... | [
{
"created": "Fri, 6 Nov 2020 18:30:57 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Nov 2020 14:51:04 GMT",
"version": "v2"
},
{
"created": "Fri, 5 Feb 2021 18:41:25 GMT",
"version": "v3"
},
{
"created": "Mon, 15 Feb 2021 20:45:28 GMT",
"version": "v4"
}
] | 2021-02-24 | [
[
"Gupta",
"Pawan Kumar",
""
],
[
"Steinhoff",
"Jan",
""
],
[
"Hinderer",
"Tanja",
""
]
] | Gravitomagnetic quasi-normal modes of neutron stars are resonantly excited by tidal effects during a binary inspiral, leading to a potentially measurable effect in the gravitational-wave signal. We take an important step towards incorporating these effects in waveform models by developing a relativistic effective actio... |
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