id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0901.1220 | Alessandro Marini | M. Barucci (6 and 7), M. Bassan (2 and 3), B. Buonomo (1), G.
Cavallari (4), E. Coccia (2 and 3), S. D'Antonio (2), V. Fafone (2 and 3), C.
Ligi (1), L. Lolli (6 and 7), A. Marini (1), G. Mazzitelli (1), G. Modestino
(1), G. Pizzella (3 and 1), L. Quintieri (1), L. Risegari (6 and 7), A.
Rocchi (2), F. Ronga (1... | Experimental study of high energy electron interactions in a
superconducting aluminum alloy resonant bar | null | Phys.Lett.A373:1801-1806,2009 | 10.1016/j.physleta.2009.03.043 | null | gr-qc physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Peak amplitude measurements of the fundamental mode of oscillation of a
suspended aluminum alloy bar hit by an electron beam show that the amplitude is
enhanced by a factor ~3.5 when the material is in the superconducting state.
This result is consistent with the cosmic ray observations made by the resonant
gravitati... | [
{
"created": "Fri, 9 Jan 2009 11:14:43 GMT",
"version": "v1"
}
] | 2014-11-18 | [
[
"Barucci",
"M.",
"",
"6 and 7"
],
[
"Bassan",
"M.",
"",
"2 and 3"
],
[
"Buonomo",
"B.",
"",
"2 and 3"
],
[
"Cavallari",
"G.",
"",
"2 and 3"
],
[
"Coccia",
"E.",
"",
"2 and 3"
],
[
"D'Antonio",
"S.",
"",... | Peak amplitude measurements of the fundamental mode of oscillation of a suspended aluminum alloy bar hit by an electron beam show that the amplitude is enhanced by a factor ~3.5 when the material is in the superconducting state. This result is consistent with the cosmic ray observations made by the resonant gravitation... |
1607.04250 | Jorge L. Cervantes-Cota | Jorge L. Cervantes-Cota, D.-E. Liebscher | On constructing purely affine theories with matter | 13 pages | Gen. Relativ. Gravit. (2016) 48:108 | 10.1007/s10714-016-2103-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore ways to obtain the very existence of a space-time metric from an
action principle that does not refer to it a priori. Although there are reasons
to believe that only a non-local theory can viably achieve this goal, we
investigate here local theories that start with Schroedinger's purely affine
theory [21],... | [
{
"created": "Thu, 14 Jul 2016 19:03:47 GMT",
"version": "v1"
}
] | 2016-07-15 | [
[
"Cervantes-Cota",
"Jorge L.",
""
],
[
"Liebscher",
"D. -E.",
""
]
] | We explore ways to obtain the very existence of a space-time metric from an action principle that does not refer to it a priori. Although there are reasons to believe that only a non-local theory can viably achieve this goal, we investigate here local theories that start with Schroedinger's purely affine theory [21], w... |
1905.01394 | Olivier Dore | Roland de Putter, Olivier Dor\'e | In search of an observational quantum signature of the primordial
perturbations in slow-roll and ultra slow-roll inflation | 27 pages, 7 figures. Comments welcome | Phys. Rev. D 101, 043511 (2020) | 10.1103/PhysRevD.101.043511 | null | gr-qc astro-ph.CO quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the standard inflationary paradigm, cosmological density perturbations are
generated as quantum fluctuations in the early Universe, but then undergo a
quantum-to-classical transition. A key role in this transition is played by
squeezing of the quantum state, which is a result of the strong suppression of
the decay... | [
{
"created": "Sat, 4 May 2019 00:26:18 GMT",
"version": "v1"
}
] | 2020-02-19 | [
[
"de Putter",
"Roland",
""
],
[
"Doré",
"Olivier",
""
]
] | In the standard inflationary paradigm, cosmological density perturbations are generated as quantum fluctuations in the early Universe, but then undergo a quantum-to-classical transition. A key role in this transition is played by squeezing of the quantum state, which is a result of the strong suppression of the decayin... |
1904.05706 | Dennis Hansen | Dennis Hansen, Jelle Hartong and Niels A. Obers | Gravity between Newton and Einstein | Essay written for the Gravity Research Foundation 2019 Awards for
Essays on Gravitation; Honorable Mention | null | 10.1142/S0218271819440103 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Statements about relativistic effects are often subtle. In this essay we will
demonstrate that the three classical tests of general relativity, namely
perihelion precession, deflection of light and gravitational redshift, are
passed perfectly by an extension of Newtonian gravity that includes
gravitational time dilat... | [
{
"created": "Thu, 11 Apr 2019 14:08:07 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Jun 2019 14:17:21 GMT",
"version": "v2"
},
{
"created": "Wed, 29 Jan 2020 10:31:02 GMT",
"version": "v3"
}
] | 2020-01-30 | [
[
"Hansen",
"Dennis",
""
],
[
"Hartong",
"Jelle",
""
],
[
"Obers",
"Niels A.",
""
]
] | Statements about relativistic effects are often subtle. In this essay we will demonstrate that the three classical tests of general relativity, namely perihelion precession, deflection of light and gravitational redshift, are passed perfectly by an extension of Newtonian gravity that includes gravitational time dilatio... |
1808.08975 | Jo\~ao Lu\'is Rosa | Jo\~ao Lu\'is Rosa, Jos\'e P. S. Lemos, Francisco S. N. Lobo | Wormholes in generalized hybrid metric-Palatini gravity obeying the
matter null energy condition everywhere | 12 pages, 2 figures | Phys. Rev. D 98, 064054 (2018) | 10.1103/PhysRevD.98.064054 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Wormhole solutions in a generalized hybrid metric-Palatini matter theory,
given by a gravitational Lagrangian $f\left(R,\cal{R}\right)$, where $R$ is the
metric Ricci scalar, and $\mathcal{R}$ is a Palatini scalar curvature defined
in terms of an independent connection, and a matter Lagrangian, are found. The
solutio... | [
{
"created": "Mon, 27 Aug 2018 18:01:56 GMT",
"version": "v1"
}
] | 2018-10-03 | [
[
"Rosa",
"João Luís",
""
],
[
"Lemos",
"José P. S.",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | Wormhole solutions in a generalized hybrid metric-Palatini matter theory, given by a gravitational Lagrangian $f\left(R,\cal{R}\right)$, where $R$ is the metric Ricci scalar, and $\mathcal{R}$ is a Palatini scalar curvature defined in terms of an independent connection, and a matter Lagrangian, are found. The solutions... |
2309.03065 | Orlando Luongo | Orlando Luongo, Tommaso Mengoni | Quasi-quintessence inflation with non-minimal coupling to curvature in
the Jordan and Einstein frames | 28 pages, 11 figures, 4 tables | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We here explore a specific class of scalar field, dubbed quasi-quintessence
which exhibits characteristics akin to ordinary matter. Specifically, we
investigate under which conditions this fluid can mitigate the classical
cosmological constant problem. We remark that, assuming a phase transition, it
is possible to pr... | [
{
"created": "Wed, 6 Sep 2023 15:07:54 GMT",
"version": "v1"
}
] | 2023-09-07 | [
[
"Luongo",
"Orlando",
""
],
[
"Mengoni",
"Tommaso",
""
]
] | We here explore a specific class of scalar field, dubbed quasi-quintessence which exhibits characteristics akin to ordinary matter. Specifically, we investigate under which conditions this fluid can mitigate the classical cosmological constant problem. We remark that, assuming a phase transition, it is possible to pred... |
0908.4029 | Wlodzimierz Piechocki | Przemyslaw Malkiewicz and Wlodzimierz Piechocki | Turning big bang into big bounce: II. Quantum dynamics | 14 pages, no figures, version accepted for publication in Class.
Quant. Grav | Class.Quant.Grav.27:225018,2010 | 10.1088/0264-9381/27/22/225018 | null | gr-qc astro-ph.CO hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the big bounce transition of the quantum FRW model in the setting
of the nonstandard loop quantum cosmology (LQC). Elementary observables are
used to quantize composite observables. The spectrum of the energy density
operator is bounded and continuous. The spectrum of the volume operator is
bounded from be... | [
{
"created": "Thu, 27 Aug 2009 15:05:37 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Oct 2009 09:57:41 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Feb 2010 17:40:11 GMT",
"version": "v3"
},
{
"created": "Sat, 20 Mar 2010 07:35:30 GMT",
"version": "v4"
},
{
"c... | 2011-03-28 | [
[
"Malkiewicz",
"Przemyslaw",
""
],
[
"Piechocki",
"Wlodzimierz",
""
]
] | We analyze the big bounce transition of the quantum FRW model in the setting of the nonstandard loop quantum cosmology (LQC). Elementary observables are used to quantize composite observables. The spectrum of the energy density operator is bounded and continuous. The spectrum of the volume operator is bounded from belo... |
1208.0580 | Claudia de Rham | Claudia de Rham, Andrew J. Tolley and Daniel H. Wesley | Vainshtein Mechanism in Binary Pulsars | minor revisions to match published version in prd | Phys. Rev. D 87, 044025 (2013) | 10.1103/PhysRevD.87.044025 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the scalar gravitational radiation from a binary pulsar system in
the simplest model that exhibits the Vainshtein mechanism. The mechanism is
successful in screening the effect from scalar fields conformally coupled to
matter, although gravitational radiation is less suppressed relative to its
general rela... | [
{
"created": "Thu, 2 Aug 2012 19:33:57 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Aug 2012 08:48:04 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Mar 2013 19:58:19 GMT",
"version": "v3"
}
] | 2013-03-14 | [
[
"de Rham",
"Claudia",
""
],
[
"Tolley",
"Andrew J.",
""
],
[
"Wesley",
"Daniel H.",
""
]
] | We compute the scalar gravitational radiation from a binary pulsar system in the simplest model that exhibits the Vainshtein mechanism. The mechanism is successful in screening the effect from scalar fields conformally coupled to matter, although gravitational radiation is less suppressed relative to its general relati... |
gr-qc/9411027 | null | J. W. Moffat | Consistency of the Nonsymmetric Gravitational Theory | 20 pages, plain TeX. Corrections of typographical errors | null | null | UTPT-94-30 | gr-qc | null | A nonsymmetric gravitational theory (NGT) is presented which is free of ghost
poles, tachyons and higher-order poles and there are no problems with
asymptotic boundary conditions. An extended Birkhoff theorem is shown to hold
for the spherically symmetric solution of the field equations. A static
spherically symmetri... | [
{
"created": "Thu, 10 Nov 1994 18:16:33 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Dec 1994 22:11:21 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Moffat",
"J. W.",
""
]
] | A nonsymmetric gravitational theory (NGT) is presented which is free of ghost poles, tachyons and higher-order poles and there are no problems with asymptotic boundary conditions. An extended Birkhoff theorem is shown to hold for the spherically symmetric solution of the field equations. A static spherically symmetric ... |
0811.3823 | Hamid Reza Sepangi | K. Atazadeh and H. R. Sepangi | Brans-Dicke DGP Brane Cosmology | 12 pages, 1 figure, to appear in JCAP | JCAP 0901:006,2009 | 10.1088/1475-7516/2009/01/006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a five dimensional DGP-brane scenario endowed with a
non-minimally coupled scalar field within the context of Brans-Dicke theory.
This theory predicts that the mass appearing in the gravitational potential is
modified by the addition of the mass of the effective intrinsic curvature on
the brane. We also d... | [
{
"created": "Mon, 24 Nov 2008 09:04:58 GMT",
"version": "v1"
}
] | 2009-11-19 | [
[
"Atazadeh",
"K.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | We consider a five dimensional DGP-brane scenario endowed with a non-minimally coupled scalar field within the context of Brans-Dicke theory. This theory predicts that the mass appearing in the gravitational potential is modified by the addition of the mass of the effective intrinsic curvature on the brane. We also der... |
gr-qc/0310104 | Makoto Narita | Makoto Narita | Global existence problem in $T^3$-Gowdy symmetric IIB superstring
cosmology | null | Class.Quant.Grav. 20 (2003) 4983-4994 | 10.1088/0264-9381/20/23/003 | AEI-2003-083 | gr-qc hep-th math.AP math.DG | null | We show global existence theorems for Gowdy symmetric spacetimes with type
IIB stringy matter. The areal and constant mean curvature time coordinates are
used. Before coming to that, it is shown that a wave map describes the
evolution of this system.
| [
{
"created": "Wed, 22 Oct 2003 10:17:07 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Narita",
"Makoto",
""
]
] | We show global existence theorems for Gowdy symmetric spacetimes with type IIB stringy matter. The areal and constant mean curvature time coordinates are used. Before coming to that, it is shown that a wave map describes the evolution of this system. |
gr-qc/0507098 | Guillermo A. Mena Marugan | Pablo Galan and Guillermo A. Mena Marugan | Length Uncertainty in a Gravity's Rainbow Formalism | 12 pages, accepted for publication in Physical Review D | Phys.Rev. D72 (2005) 044019 | 10.1103/PhysRevD.72.044019 | null | gr-qc | null | It is commonly accepted that the combination of quantum mechanics and general
relativity gives rise to the emergence of a minimum uncertainty both in space
and time. The arguments that support this conclusion are mainly based on
perturbative approaches to the quantization, in which the gravitational
interactions of t... | [
{
"created": "Sat, 23 Jul 2005 11:49:44 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Galan",
"Pablo",
""
],
[
"Marugan",
"Guillermo A. Mena",
""
]
] | It is commonly accepted that the combination of quantum mechanics and general relativity gives rise to the emergence of a minimum uncertainty both in space and time. The arguments that support this conclusion are mainly based on perturbative approaches to the quantization, in which the gravitational interactions of the... |
1109.1941 | Daniela Pugliese Dr | D. Pugliese, G. Montani, V. Lacquaniti | On the electromagnetic emission from charged test particles in a five
dimensional spacetime | 13 pages, 10 figure, to be published in European Physical Journal C.
Keywords:Kaluza Klein theory--Generalized Schwarzschild solution (GSS)--Test
particle orbits--Emission spectra | The European Physical Journal C - Particles And Fields. Volume 71,
Number 9, 1747-6 (2011) | 10.1140/epjc/s10052-011-1747-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the motion of charged particles radially falling in a class of
static and electromagnetic-free, five-dimensional Kaluza-Klein backgrounds.
Particle dynamics in such spacetimes is explored by an approach \emph{a
l$\acute{a}$} Papapetrou. The electromagnetic radiation emitted by these
particles is studied, out... | [
{
"created": "Fri, 9 Sep 2011 08:37:07 GMT",
"version": "v1"
}
] | 2012-02-07 | [
[
"Pugliese",
"D.",
""
],
[
"Montani",
"G.",
""
],
[
"Lacquaniti",
"V.",
""
]
] | We study the motion of charged particles radially falling in a class of static and electromagnetic-free, five-dimensional Kaluza-Klein backgrounds. Particle dynamics in such spacetimes is explored by an approach \emph{a l$\acute{a}$} Papapetrou. The electromagnetic radiation emitted by these particles is studied, outli... |
gr-qc/0001036 | John E. Heighway | John E. Heighway | Towards a Deeper Understanding of General Relativity | 15 pages, pdf. Two figures. Comments and questions welcome | null | null | null | gr-qc | null | Standard treatments of general relativity accept the gravitational slowing of
clocks as a primary phenomenon, requiring no further analysis as to cause.
Rejecting this attitude, I argue that one or more of the fundamental
"constants" governing the quantum mechanics of atoms must depend upon position
in a gravitationa... | [
{
"created": "Wed, 12 Jan 2000 14:58:51 GMT",
"version": "v1"
},
{
"created": "Fri, 5 May 2000 21:31:21 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Sep 2001 15:14:20 GMT",
"version": "v3"
},
{
"created": "Sun, 16 Sep 2001 20:12:09 GMT",
"version": "v4"
},
{
"cre... | 2007-05-23 | [
[
"Heighway",
"John E.",
""
]
] | Standard treatments of general relativity accept the gravitational slowing of clocks as a primary phenomenon, requiring no further analysis as to cause. Rejecting this attitude, I argue that one or more of the fundamental "constants" governing the quantum mechanics of atoms must depend upon position in a gravitational ... |
1005.5401 | Catherine Williams | Catherine Williams | A black hole with no marginally trapped tube asymptotic to its event
horizon | 12 pages; to appear in the Proceedings of the Complex Analysis &
Dynamical Systems IV Conference (Nahariya, Israel, May 2009) | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct an example of a spherically symmetric black hole interior in
which there is NO (spherically symmetric) marginally trapped tube asymptotic to
the event horizon. The construction uses a self-gravitating massive scalar
field matter model, and the key condition we impose is that the scalar field
$\phi$ be bo... | [
{
"created": "Fri, 28 May 2010 21:17:25 GMT",
"version": "v1"
}
] | 2010-06-01 | [
[
"Williams",
"Catherine",
""
]
] | We construct an example of a spherically symmetric black hole interior in which there is NO (spherically symmetric) marginally trapped tube asymptotic to the event horizon. The construction uses a self-gravitating massive scalar field matter model, and the key condition we impose is that the scalar field $\phi$ be boun... |
0809.0617 | Song Li | Song Li, Yongge Ma and Yun Chen | Dynamical Evolution of Interacting Modified Chaplygin Gas | 10 pages, 6 figures, accepted for publication in Int. J. Mod. Phys. D | Int.J.Mod.Phys.D18:1785-1800,2009 | 10.1142/S0218271809015321 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmological model of the modified Chaplygin gas interacting with cold
dark matter is studied. Our attention is focused on the final state of universe
in the model. It turns out that there exists a stable scaling solution, which
provides the possibility to alleviate the coincidence problem. In addition, we
invest... | [
{
"created": "Wed, 3 Sep 2008 02:37:22 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Jul 2009 13:19:45 GMT",
"version": "v2"
}
] | 2009-12-04 | [
[
"Li",
"Song",
""
],
[
"Ma",
"Yongge",
""
],
[
"Chen",
"Yun",
""
]
] | The cosmological model of the modified Chaplygin gas interacting with cold dark matter is studied. Our attention is focused on the final state of universe in the model. It turns out that there exists a stable scaling solution, which provides the possibility to alleviate the coincidence problem. In addition, we investig... |
gr-qc/9711006 | Jeong Won Ho | Jeongwon Ho, Won Tae Kim, and Young-Jai Park | Duality of Quasilocal Black Hole Thermodynamics | 19 pages, Latex, no figures, to be published in Class. Quantum Grav.
Some minor changes, references added | Class.Quant.Grav. 15 (1998) 1437-1448 | 10.1088/0264-9381/15/6/003 | SOGANG-HEP-224/97 | gr-qc hep-th | null | We consider T-duality of the quasilocal black hole thermodynamics for the
three-dimensional low energy effective string theory. Quasilocal thermodynamic
variables in the first law are explicitly calculated on a general axisymmetric
three-dimensional black hole solution and corresponding dual one. Physical
meaning of ... | [
{
"created": "Tue, 4 Nov 1997 07:21:38 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Apr 1998 13:44:43 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Ho",
"Jeongwon",
""
],
[
"Kim",
"Won Tae",
""
],
[
"Park",
"Young-Jai",
""
]
] | We consider T-duality of the quasilocal black hole thermodynamics for the three-dimensional low energy effective string theory. Quasilocal thermodynamic variables in the first law are explicitly calculated on a general axisymmetric three-dimensional black hole solution and corresponding dual one. Physical meaning of th... |
2001.03440 | Saulo Carneiro | C\'assio Pigozzo, Flora S. Bacelar and Saulo Carneiro | On the value of the Immirzi parameter and the horizon entropy | 11 pages, 9 figures. Final version, matching that published in
Classical and Quantum Gravity | Class. Quant. Grav. 38 (2021) 045001 | 10.1088/1361-6382/abce6a | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Loop Quantum Gravity (LQG) the quantisation of General Relativity leads to
precise predictions for the eigenvalues of geometrical observables like volume
and area, up to the value of the only free parameter of the theory, the
Barbero-Immirzi (BI) parameter. With the help of the eigenvalues equation for
the area op... | [
{
"created": "Fri, 10 Jan 2020 13:45:29 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Mar 2020 15:06:57 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Jul 2020 14:37:26 GMT",
"version": "v3"
},
{
"created": "Sun, 29 Nov 2020 15:00:49 GMT",
"version": "v4"
}
] | 2021-01-01 | [
[
"Pigozzo",
"Cássio",
""
],
[
"Bacelar",
"Flora S.",
""
],
[
"Carneiro",
"Saulo",
""
]
] | In Loop Quantum Gravity (LQG) the quantisation of General Relativity leads to precise predictions for the eigenvalues of geometrical observables like volume and area, up to the value of the only free parameter of the theory, the Barbero-Immirzi (BI) parameter. With the help of the eigenvalues equation for the area oper... |
2201.01495 | Tanmaya Mishra | T. Mishra, B. O'Brien, M. Szczepanczyk, G. Vedovato, S. Bhaumik, V.
Gayathri, G. Prodi, F. Salemi, E. Milotti, I. Bartos, S. Klimenko | Search for binary black hole mergers in the third observing run of
Advanced LIGO-Virgo using coherent WaveBurst enhanced with machine learning | 11 pages, 8 figures. arXiv admin note: text overlap with
arXiv:2105.04739 | null | 10.1103/PhysRevD.105.083018 | LIGO-P2100421 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we use the coherent WaveBurst (cWB) pipeline enhanced with
machine learning (ML) to search for binary black hole (BBH) mergers in the
Advanced LIGO-Virgo strain data from the third observing run (O3). We detect,
with equivalent or higher significance, all gravitational-wave (GW) events
previously report... | [
{
"created": "Wed, 5 Jan 2022 08:20:02 GMT",
"version": "v1"
}
] | 2022-05-11 | [
[
"Mishra",
"T.",
""
],
[
"O'Brien",
"B.",
""
],
[
"Szczepanczyk",
"M.",
""
],
[
"Vedovato",
"G.",
""
],
[
"Bhaumik",
"S.",
""
],
[
"Gayathri",
"V.",
""
],
[
"Prodi",
"G.",
""
],
[
"Salemi",
"F.",... | In this work, we use the coherent WaveBurst (cWB) pipeline enhanced with machine learning (ML) to search for binary black hole (BBH) mergers in the Advanced LIGO-Virgo strain data from the third observing run (O3). We detect, with equivalent or higher significance, all gravitational-wave (GW) events previously reported... |
1105.6269 | Brahim Lamine | B. Lamine, J.-M. Courty, S. Reynaud, M.-T. Jaekel | Testing gravity law in the solar system | Proceedings of Journ\'ees 2010 "Syst\`emes de r\'ef\'erence
spatio-temporels", New challenges for reference systems and numerical
standards in astronomy | New challenges for reference systems and numerical standards in
astronomy (Observatoire de Paris, 2011) p.270-273 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The predictions of General relativity (GR) are in good agreement with
observations in the solar system. Nevertheless, unexpected anomalies appeared
during the last decades, along with the increasing precision of measurements.
Those anomalies are present in spacecraft tracking data (Pioneer and flyby
anomalies) as wel... | [
{
"created": "Tue, 31 May 2011 13:22:52 GMT",
"version": "v1"
}
] | 2014-09-16 | [
[
"Lamine",
"B.",
""
],
[
"Courty",
"J. -M.",
""
],
[
"Reynaud",
"S.",
""
],
[
"Jaekel",
"M. -T.",
""
]
] | The predictions of General relativity (GR) are in good agreement with observations in the solar system. Nevertheless, unexpected anomalies appeared during the last decades, along with the increasing precision of measurements. Those anomalies are present in spacecraft tracking data (Pioneer and flyby anomalies) as well ... |
2001.02368 | Vipin Dubey | Umesh Kumar Sharma and Vipin Chandra Dubey | Interacting R\'enyi holographic dark energy with parametrization on the
interaction term | 23 pages, 12 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work, we study the R$\acute{e}$nyi holographic dark energy
model (RHDE) in a flat FRW Universe where the infrared cut-off is taken care by
the Hubble horizon and also by taking three different parametrizations of the
interaction term between the dark matter and the dark energy. Analyzing
graphically, t... | [
{
"created": "Tue, 7 Jan 2020 12:51:29 GMT",
"version": "v1"
},
{
"created": "Sat, 28 Nov 2020 11:12:12 GMT",
"version": "v2"
}
] | 2020-12-01 | [
[
"Sharma",
"Umesh Kumar",
""
],
[
"Dubey",
"Vipin Chandra",
""
]
] | In the present work, we study the R$\acute{e}$nyi holographic dark energy model (RHDE) in a flat FRW Universe where the infrared cut-off is taken care by the Hubble horizon and also by taking three different parametrizations of the interaction term between the dark matter and the dark energy. Analyzing graphically, the... |
2312.08508 | Aurora Ireland | Aurora Ireland, Stefano Profumo, Jordan Scharnhorst | Gravitational Waves from Primordial Black Hole Evaporation with Large
Extra Dimensions | 27 pages, 6 figures | null | null | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | The spectra of gravitational waves from black hole evaporation generically
peak at frequencies of order the Hawking temperature, making this signal
ultra-high frequency for primordial black holes evaporating in the early
universe. This motivates us to consider small black holes in theories with
large extra dimensions... | [
{
"created": "Wed, 13 Dec 2023 20:45:43 GMT",
"version": "v1"
}
] | 2023-12-15 | [
[
"Ireland",
"Aurora",
""
],
[
"Profumo",
"Stefano",
""
],
[
"Scharnhorst",
"Jordan",
""
]
] | The spectra of gravitational waves from black hole evaporation generically peak at frequencies of order the Hawking temperature, making this signal ultra-high frequency for primordial black holes evaporating in the early universe. This motivates us to consider small black holes in theories with large extra dimensions, ... |
1105.3810 | Takashi Tamaki | Takashi Tamaki, Nobuyuki Sakai | Gravitating Q-balls in the Affleck-Dine mechanism | 5 pages, 7 figures | Phys.Rev.D83:084046,2011 | 10.1103/PhysRevD.83.084046 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate how gravity affects "Q-balls" with the Affleck-Dine potential
$V_{AD}(\phi):=\frac{m^2}{2}\phi^2[ 1+K\ln (\frac{\phi}{M})^2]$. Contrary to
the flat case, in which equilibrium solutions exist only if $K<0$, we find
three types of gravitating solutions as follows. In the case that $K<0$,
ordinary Q-ball ... | [
{
"created": "Thu, 19 May 2011 08:28:18 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Tamaki",
"Takashi",
""
],
[
"Sakai",
"Nobuyuki",
""
]
] | We investigate how gravity affects "Q-balls" with the Affleck-Dine potential $V_{AD}(\phi):=\frac{m^2}{2}\phi^2[ 1+K\ln (\frac{\phi}{M})^2]$. Contrary to the flat case, in which equilibrium solutions exist only if $K<0$, we find three types of gravitating solutions as follows. In the case that $K<0$, ordinary Q-ball so... |
2408.07711 | Iv\'an De Jes\'us Cortes | Ricardo Rosas-Rodr\'iguez and Iv\'an Cortes-Cruz | Cosmological functions and their relation | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the non-metric gravity proposed by K. Krasnov, this is a theory in which
the scalar constraint of the Ashtekar's formalism is modified in such way that
the cosmological constant is replaced by a cosmological function that depends
of the canonical variables $A_{a}{}^{i}$ and $E_{i}{}^{a}$, the General
Relativity (G... | [
{
"created": "Tue, 13 Aug 2024 19:53:26 GMT",
"version": "v1"
}
] | 2024-08-16 | [
[
"Rosas-Rodríguez",
"Ricardo",
""
],
[
"Cortes-Cruz",
"Iván",
""
]
] | In the non-metric gravity proposed by K. Krasnov, this is a theory in which the scalar constraint of the Ashtekar's formalism is modified in such way that the cosmological constant is replaced by a cosmological function that depends of the canonical variables $A_{a}{}^{i}$ and $E_{i}{}^{a}$, the General Relativity (GR)... |
1712.08762 | Marko Sossich | Sumarna Haroon, Mubasher Jamil, Kai Lin, Petar Pavlovic, Marko Sossich
and Anzhong Wang | The Effects of Running Gravitational Coupling On Rotating Black Holes | 32 pages, 16 figures, to be published in EPJC | Eur. Phys. J. C (2018) 78:519 | 10.1140/epjc/s10052-018-5986-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we investigate the consequences of running gravitational
coupling on the properties of rotating black holes. Apart from the changes
induced in the space-time structure of such black holes, we also study the
implications to Penrose process and geodetic precession. We are motivated by
the functional form o... | [
{
"created": "Sat, 23 Dec 2017 12:10:45 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jan 2018 08:45:26 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Jun 2018 11:20:31 GMT",
"version": "v3"
}
] | 2018-06-29 | [
[
"Haroon",
"Sumarna",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Lin",
"Kai",
""
],
[
"Pavlovic",
"Petar",
""
],
[
"Sossich",
"Marko",
""
],
[
"Wang",
"Anzhong",
""
]
] | In this work we investigate the consequences of running gravitational coupling on the properties of rotating black holes. Apart from the changes induced in the space-time structure of such black holes, we also study the implications to Penrose process and geodetic precession. We are motivated by the functional form of ... |
gr-qc/0403078 | David Garfinkle | David Garfinkle | Numerical simulation of a possible counterexample to cosmic censorship | discussion clarified | Phys.Rev. D69 (2004) 124017 | 10.1103/PhysRevD.69.124017 | null | gr-qc hep-th | null | A numerical simulation is presented here of the evolution of initial data of
the kind that was conjectured by Hertog, Horowitz and Maeda to be a violation
of cosmic censorship. That initial data is essentially a thick domain wall
connecting two regions of anti-deSitter space. The initial data has a free
parameter tha... | [
{
"created": "Wed, 17 Mar 2004 23:36:42 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Mar 2004 00:59:01 GMT",
"version": "v2"
},
{
"created": "Fri, 6 Aug 2004 18:59:54 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Garfinkle",
"David",
""
]
] | A numerical simulation is presented here of the evolution of initial data of the kind that was conjectured by Hertog, Horowitz and Maeda to be a violation of cosmic censorship. That initial data is essentially a thick domain wall connecting two regions of anti-deSitter space. The initial data has a free parameter that ... |
0903.5311 | Emanuele Berti | Emanuele Berti, Vitor Cardoso, Paolo Pani | Breit-Wigner resonances and the quasinormal modes of anti-de Sitter
black holes | 5 pages, 2 tables, 3 figures | Phys.Rev.D79:101501,2009 | 10.1103/PhysRevD.79.101501 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this short communication is to show that the theory of
Breit-Wigner resonances can be used as an efficient numerical tool to compute
black hole quasinormal modes. For illustration we focus on the Schwarzschild
anti-de Sitter (SAdS) spacetime. The resonance method is better suited to small
SAdS black ho... | [
{
"created": "Mon, 30 Mar 2009 20:21:24 GMT",
"version": "v1"
}
] | 2009-07-30 | [
[
"Berti",
"Emanuele",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Pani",
"Paolo",
""
]
] | The purpose of this short communication is to show that the theory of Breit-Wigner resonances can be used as an efficient numerical tool to compute black hole quasinormal modes. For illustration we focus on the Schwarzschild anti-de Sitter (SAdS) spacetime. The resonance method is better suited to small SAdS black hole... |
2109.10615 | Tsutomu Kobayashi | Aya Iyonaga, Tsutomu Kobayashi | Distinguishing modified gravity with just two tensorial degrees of
freedom from general relativity: Black holes, cosmology, and matter coupling | 14 pages, 2 figures | null | 10.1103/PhysRevD.104.124020 | RUP-21-16 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider spatially covariant modified gravity in which the would-be scalar
degree of freedom is made non-dynamical and hence there are just two tensorial
degrees of freedom, i.e., the same number of dynamical degrees of freedom as in
general relativity. Focusing on a class of such modified gravity theories
charact... | [
{
"created": "Wed, 22 Sep 2021 09:28:22 GMT",
"version": "v1"
}
] | 2021-12-15 | [
[
"Iyonaga",
"Aya",
""
],
[
"Kobayashi",
"Tsutomu",
""
]
] | We consider spatially covariant modified gravity in which the would-be scalar degree of freedom is made non-dynamical and hence there are just two tensorial degrees of freedom, i.e., the same number of dynamical degrees of freedom as in general relativity. Focusing on a class of such modified gravity theories character... |
0905.4182 | Masato Minamitsuji | Bum-Hoon Lee, Wonwoo Lee, Masato Minamitsuji | Domain wall universe in the Einstein-Born-Infeld theory | 8 pages, the version to be published in PLB | Phys.Lett.B679:160-166,2009 | 10.1016/j.physletb.2009.07.026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this Letter, we discuss the dynamics of a domain wall universe embedded
into the charged black hole spacetime of the Einstein-Born-Infeld (EBI) theory.
There are four kinds of possible spacetime structures, i.e., those with no
horizon, the extremal one, those with two horizons (as the
Reissner-Nordstr$\rm{\ddot o}... | [
{
"created": "Tue, 26 May 2009 12:17:13 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Jun 2009 05:00:35 GMT",
"version": "v2"
},
{
"created": "Sat, 25 Jul 2009 11:57:52 GMT",
"version": "v3"
}
] | 2010-04-30 | [
[
"Lee",
"Bum-Hoon",
""
],
[
"Lee",
"Wonwoo",
""
],
[
"Minamitsuji",
"Masato",
""
]
] | In this Letter, we discuss the dynamics of a domain wall universe embedded into the charged black hole spacetime of the Einstein-Born-Infeld (EBI) theory. There are four kinds of possible spacetime structures, i.e., those with no horizon, the extremal one, those with two horizons (as the Reissner-Nordstr$\rm{\ddot o}$m... |
1009.5059 | Hossein Farajollahi | H.Farajollahi, M.Farhoudi, A.Salehi, H.Shojaie | Chameleonic Generalized Brans--Dicke model and late-time acceleration | 20 pages, 15 figures, to be published in Astrophys. Space Sci. (2011) | Astrophys.Space Sci.337:415-423, 2012 | 10.1007/s10509-011-0837-0 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider Chameleonic Generalized Brans--Dicke Cosmology in
the framework of FRW universes. The bouncing solution and phantom crossing is
investigated for the model. Two independent cosmological tests: Cosmological
Redshift Drift (CRD) and distance modulus are applied to test the model with
the observ... | [
{
"created": "Sun, 26 Sep 2010 04:38:19 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Aug 2011 11:30:52 GMT",
"version": "v2"
}
] | 2012-01-20 | [
[
"Farajollahi",
"H.",
""
],
[
"Farhoudi",
"M.",
""
],
[
"Salehi",
"A.",
""
],
[
"Shojaie",
"H.",
""
]
] | In this paper we consider Chameleonic Generalized Brans--Dicke Cosmology in the framework of FRW universes. The bouncing solution and phantom crossing is investigated for the model. Two independent cosmological tests: Cosmological Redshift Drift (CRD) and distance modulus are applied to test the model with the observat... |
2011.02440 | Philip D. Mannheim | Asanka Amarasinghe and Philip D. Mannheim | Cosmological Fluctuations on the Light Cone | 21 pages. Final version, to appear in Phys. Rev. D | Phys. Rev. D 103, 103517 (2021) | 10.1103/PhysRevD.103.103517 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In studying temperature fluctuations in the cosmic microwave background
Weinberg has noted that some ease of calculation and insight can be achieved by
looking at the structure of the perturbed light cone on which the perturbed
photons propagate. In his approach Weinberg worked in a specific gauge and
specialized to ... | [
{
"created": "Wed, 4 Nov 2020 17:45:36 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Apr 2021 11:45:15 GMT",
"version": "v2"
}
] | 2021-05-19 | [
[
"Amarasinghe",
"Asanka",
""
],
[
"Mannheim",
"Philip D.",
""
]
] | In studying temperature fluctuations in the cosmic microwave background Weinberg has noted that some ease of calculation and insight can be achieved by looking at the structure of the perturbed light cone on which the perturbed photons propagate. In his approach Weinberg worked in a specific gauge and specialized to fl... |
gr-qc/9801027 | Stephen M. Merkowitz | Stephen M. Merkowitz and Warren W. Johnson | Deconvolving the information from an imperfect spherical gravitational
wave antenna | 5 pages, 2 figures, to be published in Europhysics Letters | Europhys.Lett. 41 (1998) 355 | 10.1209/epl/i1998-00156-5 | null | gr-qc | null | We have studied the effects of imperfections in spherical gravitational wave
antenna on our ability to properly interpret the data it will produce. The
results of a numerical simulation are reported that quantitatively describe the
systematic errors resulting from imperfections in various components of the
antenna. I... | [
{
"created": "Fri, 9 Jan 1998 16:15:58 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Merkowitz",
"Stephen M.",
""
],
[
"Johnson",
"Warren W.",
""
]
] | We have studied the effects of imperfections in spherical gravitational wave antenna on our ability to properly interpret the data it will produce. The results of a numerical simulation are reported that quantitatively describe the systematic errors resulting from imperfections in various components of the antenna. In ... |
1501.00435 | Giorgio Torrieri | Giorgio Torrieri | Holography in a background-independent effective theory | Matches published version | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the meaning of the strong equivalence principle when applied to a
quantum field theory. We show that, because of unitary inequivalence of
accelerated frames, the only way for the equivalence principle to apply exactly
is to add a boundary term representing the decoherence of degrees of freedom
leaving the ... | [
{
"created": "Fri, 2 Jan 2015 16:38:56 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Mar 2015 19:50:50 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Jul 2015 11:09:15 GMT",
"version": "v3"
}
] | 2015-07-28 | [
[
"Torrieri",
"Giorgio",
""
]
] | We discuss the meaning of the strong equivalence principle when applied to a quantum field theory. We show that, because of unitary inequivalence of accelerated frames, the only way for the equivalence principle to apply exactly is to add a boundary term representing the decoherence of degrees of freedom leaving the ob... |
2010.07660 | Sinya Aoki | Sinya Aoki, Tetsuya Onogi, Shuichi Yokoyama | Charge Conservation, Entropy Current, and Gravitation | 14 pages, 2 figures, published version | International Journal of Modern Physics A Volume 36 (2021) 2150201 | 10.1142/S0217751X21502018 | YITP-20-135, OU-HET-1076 | gr-qc cond-mat.stat-mech hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new class of vector fields to construct a conserved charge in a
general field theory whose energy momentum tensor is covariantly conserved. We
show that there always exists such a vector field in a given field theory even
without global symmetry. We also argue that the conserved current constructed
from ... | [
{
"created": "Thu, 15 Oct 2020 11:00:32 GMT",
"version": "v1"
},
{
"created": "Thu, 20 May 2021 12:55:22 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Dec 2021 01:20:37 GMT",
"version": "v3"
}
] | 2021-12-03 | [
[
"Aoki",
"Sinya",
""
],
[
"Onogi",
"Tetsuya",
""
],
[
"Yokoyama",
"Shuichi",
""
]
] | We propose a new class of vector fields to construct a conserved charge in a general field theory whose energy momentum tensor is covariantly conserved. We show that there always exists such a vector field in a given field theory even without global symmetry. We also argue that the conserved current constructed from th... |
1506.03690 | Farruh Atamurotov | Farruh Atamurotov, Sushant G. Ghosh, Bobomurat Ahmedov | Horizon structure of rotating Einstein-Born-Infeld black holes and
shadow | 13 pages, 12 figures | null | 10.1140/epjc/s10052-016-4122-9 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the horizon structure of the rotating Einstein-Born-Infeld
solution which goes over to the Einstein-Maxwell's Kerr-Newman solution as the
Born-Infeld parameter goes to infinity ($\beta \rightarrow \infty$). We find
that for a given $\beta$, mass $M$ and charge $Q$, there exist critical
spinning paramet... | [
{
"created": "Thu, 11 Jun 2015 14:36:49 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Jun 2015 11:29:45 GMT",
"version": "v2"
}
] | 2016-06-22 | [
[
"Atamurotov",
"Farruh",
""
],
[
"Ghosh",
"Sushant G.",
""
],
[
"Ahmedov",
"Bobomurat",
""
]
] | We investigate the horizon structure of the rotating Einstein-Born-Infeld solution which goes over to the Einstein-Maxwell's Kerr-Newman solution as the Born-Infeld parameter goes to infinity ($\beta \rightarrow \infty$). We find that for a given $\beta$, mass $M$ and charge $Q$, there exist critical spinning parameter... |
2406.07703 | Fabiano Feleppa | Fabiano Feleppa, Valerio Bozza, Oleg Yu. Tsupko | Strong deflection limit analysis of black hole lensing in inhomogeneous
plasma | 18 pages, 13 figures, 2 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper investigates gravitational lensing effects in the presence of
plasma in the strong deflection limit, which corresponds to light rays circling
around a compact object and forming higher-order images. While previous studies
of this case have predominantly focused on the deflection of light in a vacuum
or in ... | [
{
"created": "Tue, 11 Jun 2024 20:30:14 GMT",
"version": "v1"
}
] | 2024-06-13 | [
[
"Feleppa",
"Fabiano",
""
],
[
"Bozza",
"Valerio",
""
],
[
"Tsupko",
"Oleg Yu.",
""
]
] | This paper investigates gravitational lensing effects in the presence of plasma in the strong deflection limit, which corresponds to light rays circling around a compact object and forming higher-order images. While previous studies of this case have predominantly focused on the deflection of light in a vacuum or in th... |
2006.06891 | Euclides Silva | A. R. P. Moreira, J. E. G. Silva, D. F. S. Veras, and C. A. S. Almeida | Thick string-like braneworlds in f(T) gravity | 25 pages, 11 figures | Int. Journ. Mod. Phys. D, 30, 2150047 (2021) | 10.1142/S0218271821500474 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a codimension two warped braneworld model within the teleparallel
$f(T)$ gravity. By assuming a global vortex as the source, we found a $l=0$
vortex solution that yields to a thick string-like brane. Asymptotically, the
bulk geometry converges to an $AdS_6$ spacetime whose cosmological constant is
produced... | [
{
"created": "Fri, 12 Jun 2020 00:39:11 GMT",
"version": "v1"
}
] | 2021-04-29 | [
[
"Moreira",
"A. R. P.",
""
],
[
"Silva",
"J. E. G.",
""
],
[
"Veras",
"D. F. S.",
""
],
[
"Almeida",
"C. A. S.",
""
]
] | We propose a codimension two warped braneworld model within the teleparallel $f(T)$ gravity. By assuming a global vortex as the source, we found a $l=0$ vortex solution that yields to a thick string-like brane. Asymptotically, the bulk geometry converges to an $AdS_6$ spacetime whose cosmological constant is produced b... |
gr-qc/0701027 | Nelson Christensen | F. Beauville, M.-A. Bizouard, L. Blackburn, L. Bosi, L. Brocco, D.
Brown, D. Buskulic, F. Cavalier, S. Chatterji, N. Christensen, A.-C. Clapson,
S. Fairhurst, D. Grosjean, G. Guidi, P. Hello, S. Heng, M. Hewitson, E.
Katsavounidis, S. Klimenko, M. Knight, A. Lazzarini, N. Leroy, F. Marion, J.
Markowitz, C. Mela... | Detailed comparison of LIGO and Virgo Inspiral Pipelines in Preparation
for a Joint Search | LIGO-Virgo Working Group. Submitted to Physical Review D | Class.Quant.Grav.25:045001,2008 | 10.1088/0264-9381/25/4/045001 | null | gr-qc | null | Presented in this paper is a detailed and direct comparison of the LIGO and
Virgo binary neutron star detection pipelines. In order to test the search
programs, numerous inspiral signals were added to 24 hours of simulated
detector data. The efficiencies of the different pipelines were tested, and
found to be compara... | [
{
"created": "Wed, 3 Jan 2007 16:26:22 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Beauville",
"F.",
""
],
[
"Bizouard",
"M. -A.",
""
],
[
"Blackburn",
"L.",
""
],
[
"Bosi",
"L.",
""
],
[
"Brocco",
"L.",
""
],
[
"Brown",
"D.",
""
],
[
"Buskulic",
"D.",
""
],
[
"Cavalier",
"F.... | Presented in this paper is a detailed and direct comparison of the LIGO and Virgo binary neutron star detection pipelines. In order to test the search programs, numerous inspiral signals were added to 24 hours of simulated detector data. The efficiencies of the different pipelines were tested, and found to be comparabl... |
2305.09391 | Parthasarathi Majumdar | Parthasarathi Majumdar | A Possible Quantum Gravity Hint in Binary Black Hole Merger | 5 Pages Revtex 4-1, 2 jpg figures, reference added. No changes in
main body of paper | Physics Letters B 849, 138467 (2024) | 10.1016/j.physletb.2024.138467 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present a semi-rigorous justification of Bekenstein's Generalized Second
Law of Thermodynamics applicable to a universe with black holes present, based
on a generic quantum gravity formulation of a black hole spacetime, where the
bulk Hamiltonian constraint plays a central role. Specializing to Loop Quantum
Gravit... | [
{
"created": "Tue, 16 May 2023 12:25:41 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Sep 2023 14:35:42 GMT",
"version": "v2"
},
{
"created": "Fri, 27 Oct 2023 06:28:12 GMT",
"version": "v3"
},
{
"created": "Thu, 4 Jan 2024 06:43:08 GMT",
"version": "v4"
},
{
"cr... | 2024-04-03 | [
[
"Majumdar",
"Parthasarathi",
""
]
] | We present a semi-rigorous justification of Bekenstein's Generalized Second Law of Thermodynamics applicable to a universe with black holes present, based on a generic quantum gravity formulation of a black hole spacetime, where the bulk Hamiltonian constraint plays a central role. Specializing to Loop Quantum Gravity,... |
1301.0106 | Alan D. Rendall | Ho Lee and Alan D. Rendall | The spatially homogeneous relativistic Boltzmann equation with a hard
potential | 21 pages | null | null | AEI-2013-000 | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study spatially homogeneous solutions of the Boltzmann
equation in special relativity and in Robertson-Walker spacetimes. We obtain an
analogue of the Povzner inequality in the relativistic case and use it to prove
global existence theorems. We show that global solutions exist for a certain
class of... | [
{
"created": "Tue, 1 Jan 2013 16:42:06 GMT",
"version": "v1"
}
] | 2013-01-03 | [
[
"Lee",
"Ho",
""
],
[
"Rendall",
"Alan D.",
""
]
] | In this paper, we study spatially homogeneous solutions of the Boltzmann equation in special relativity and in Robertson-Walker spacetimes. We obtain an analogue of the Povzner inequality in the relativistic case and use it to prove global existence theorems. We show that global solutions exist for a certain class of c... |
1006.5353 | Jian-Yang Zhu | Li-Fang Li and Jian-Yang Zhu | Quantum effect on luminosity-redshift relation | 11 pages, 3 figures; revised version | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are many different proposals for a theory of quantum gravity. Even
leaving aside the fundamental difference among theories such as the string
theory and the non-perturbative quantum gravity, we are still left with many
ambiguities (and/or parameters to be determined) with regard to the choice of
variables, the ... | [
{
"created": "Mon, 28 Jun 2010 14:00:31 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jul 2010 16:22:52 GMT",
"version": "v2"
}
] | 2010-07-12 | [
[
"Li",
"Li-Fang",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | There are many different proposals for a theory of quantum gravity. Even leaving aside the fundamental difference among theories such as the string theory and the non-perturbative quantum gravity, we are still left with many ambiguities (and/or parameters to be determined) with regard to the choice of variables, the ch... |
2009.08116 | Shaoqi Hou | Shaoqi Hou, Pengbo Li, Hai Yu, Marek Biesiada, Xi-Long Fan, Seiji
Kawamura, Zong-Hong Zhu | Lensing rates of gravitational wave signals displaying beat patterns
detectable by DECIGO and B-DECIGO | 15 pages, 7 figures. Revised based on Referee's comments | Phys. Rev. D 103, 044005 (2021) | 10.1103/PhysRevD.103.044005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The coherent nature of gravitational wave emanating from a compact binary
system makes it possible to detect some interference patterns in two (or more)
signals registered simultaneously by the detector. Gravitational lensing effect
can be used to bend trajectories of gravitational waves, which might reach the
detect... | [
{
"created": "Thu, 17 Sep 2020 07:31:53 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Dec 2020 09:37:47 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Feb 2021 01:52:12 GMT",
"version": "v3"
}
] | 2021-02-03 | [
[
"Hou",
"Shaoqi",
""
],
[
"Li",
"Pengbo",
""
],
[
"Yu",
"Hai",
""
],
[
"Biesiada",
"Marek",
""
],
[
"Fan",
"Xi-Long",
""
],
[
"Kawamura",
"Seiji",
""
],
[
"Zhu",
"Zong-Hong",
""
]
] | The coherent nature of gravitational wave emanating from a compact binary system makes it possible to detect some interference patterns in two (or more) signals registered simultaneously by the detector. Gravitational lensing effect can be used to bend trajectories of gravitational waves, which might reach the detector... |
1111.7185 | Kentaro Somiya | Kentaro Somiya (for the KAGRA Collaboration) | Detector configuration of KAGRA - the Japanese cryogenic
gravitational-wave detector | Proceeding for the Amaldi conference, 2011. To be published in
Classical Quantum Gravity | Class.Quantum Grav. 29, 124007 (2012) | 10.1088/0264-9381/29/12/124007 | null | gr-qc physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Construction of the Japanese second-generation gravitational-wave detector
KAGRA has been started. In the next 6 \sim 7 years, we will be able to observe
the space-time ripple from faraway galaxies. KAGRA is equipped with the latest
advanced technologies. The entire 3-km long detector is located in the
underground to... | [
{
"created": "Wed, 30 Nov 2011 14:35:31 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Mar 2012 19:17:06 GMT",
"version": "v2"
}
] | 2020-07-06 | [
[
"Somiya",
"Kentaro",
"",
"for the KAGRA Collaboration"
]
] | Construction of the Japanese second-generation gravitational-wave detector KAGRA has been started. In the next 6 \sim 7 years, we will be able to observe the space-time ripple from faraway galaxies. KAGRA is equipped with the latest advanced technologies. The entire 3-km long detector is located in the underground to b... |
1205.2680 | Bruno Hartmann | Bruno Hartmann | Operationalization of Relativistic Motion | 26 pages, 7 figures, introduction, technical details simplified | null | null | null | gr-qc physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate the definition of basic observables from physical operations,
the key to overcome hidden stumbling blocks and apparent paradoxes from
unscrutinized (classical) formalisms. We develop Helmholtz program of basic
measurements for relativistic motion. We define the basic observables by direct
comparison: "... | [
{
"created": "Fri, 11 May 2012 19:47:12 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Jan 2015 17:51:07 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Dec 2015 13:21:14 GMT",
"version": "v3"
}
] | 2015-12-04 | [
[
"Hartmann",
"Bruno",
""
]
] | We demonstrate the definition of basic observables from physical operations, the key to overcome hidden stumbling blocks and apparent paradoxes from unscrutinized (classical) formalisms. We develop Helmholtz program of basic measurements for relativistic motion. We define the basic observables by direct comparison: "lo... |
1307.7117 | Mohammad Reza Setare | M. R. Setare, M. J. S. Houndjo, V. Kamali | Warm-polytropic inflationary universe model | 13 pages, 1 figure | International Journal of Modern Physics D Vol. 22, No. 8 (2013)
1350041 | 10.1142/S0218271813500417 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we study warm inflationary universe models in the
context of a polytropic gas. We derive the characteristics of this model in
slow-roll approximation and develop our model in two cases, 1- For a constant
dissipative parameter $\Gamma$. 2- $\Gamma$ as a function of scalar field
$\phi$. In these ca... | [
{
"created": "Tue, 2 Jul 2013 11:13:49 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Setare",
"M. R.",
""
],
[
"Houndjo",
"M. J. S.",
""
],
[
"Kamali",
"V.",
""
]
] | In the present paper we study warm inflationary universe models in the context of a polytropic gas. We derive the characteristics of this model in slow-roll approximation and develop our model in two cases, 1- For a constant dissipative parameter $\Gamma$. 2- $\Gamma$ as a function of scalar field $\phi$. In these case... |
2305.06325 | Quentin G. Bailey | Quentin G. Bailey | Testing Gravity in the Laboratory | 25 pages, 6 figures, invited chapter for the book "Recent Progress on
Gravity Tests: Challenges and Future Perspectives", editors C. Bambi & A.
Cardenas-Avendano | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this chapter, we discuss recent work on precision Earth laboratory tests
of different aspects of gravity. In particular the discussion is focused on
those tests that can be used to probe hypothesis for physics beyond Newtonian
gravity and General Relativity. The latter includes tests of foundations like
local Lore... | [
{
"created": "Wed, 10 May 2023 17:24:14 GMT",
"version": "v1"
}
] | 2023-05-11 | [
[
"Bailey",
"Quentin G.",
""
]
] | In this chapter, we discuss recent work on precision Earth laboratory tests of different aspects of gravity. In particular the discussion is focused on those tests that can be used to probe hypothesis for physics beyond Newtonian gravity and General Relativity. The latter includes tests of foundations like local Lorent... |
1506.08344 | Allan Alinea | Allan L. Alinea, Takahiro Kubota, and Wade Naylor | Logarithmic divergences in the $k$-inflationary power spectra computed
through the uniform approximation | version 4 : extended Section 6 on remarks on logarithmic divergences | JCAP 02 (2016) 028 | 10.1088/1475-7516/2016/02/028 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a calculation method for solving the Mukhanov-Sasaki equation
in slow-roll $k$-inflation based on the uniform approximation (UA) in
conjunction with an expansion scheme for slow-roll parameters with respect to
the number of $e$-folds about the so-called \textit{turning point}. Earlier
works on this met... | [
{
"created": "Sun, 28 Jun 2015 02:02:33 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Jul 2015 01:29:54 GMT",
"version": "v2"
},
{
"created": "Sat, 7 Nov 2015 02:02:25 GMT",
"version": "v3"
},
{
"created": "Sun, 20 Dec 2015 12:51:24 GMT",
"version": "v4"
}
] | 2016-07-18 | [
[
"Alinea",
"Allan L.",
""
],
[
"Kubota",
"Takahiro",
""
],
[
"Naylor",
"Wade",
""
]
] | We investigate a calculation method for solving the Mukhanov-Sasaki equation in slow-roll $k$-inflation based on the uniform approximation (UA) in conjunction with an expansion scheme for slow-roll parameters with respect to the number of $e$-folds about the so-called \textit{turning point}. Earlier works on this metho... |
2007.15029 | Marko Toros | Marko Toro\v{s}, Thomas W. van de Kamp, Ryan J. Marshman, M. S. Kim,
Anupam Mazumdar, Sougato Bose | Relative Acceleration Noise Mitigation for Nanocrystal Matter-wave
Interferometry: Application to Entangling Masses via Quantum Gravity | 16 pages, 5 figures; accepted for publication in Physical Review
Research | Phys. Rev. Research 3, 023178 (2021) | 10.1103/PhysRevResearch.3.023178 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Matter wave interferometers with large momentum transfers, irrespective of
specific implementations, will face a universal dephasing due to relative
accelerations between the interferometric mass and the associated apparatus.
Here we propose a solution that works even without actively tracking the
relative accelerati... | [
{
"created": "Wed, 29 Jul 2020 18:01:13 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Apr 2021 13:22:38 GMT",
"version": "v2"
}
] | 2021-06-08 | [
[
"Toroš",
"Marko",
""
],
[
"van de Kamp",
"Thomas W.",
""
],
[
"Marshman",
"Ryan J.",
""
],
[
"Kim",
"M. S.",
""
],
[
"Mazumdar",
"Anupam",
""
],
[
"Bose",
"Sougato",
""
]
] | Matter wave interferometers with large momentum transfers, irrespective of specific implementations, will face a universal dephasing due to relative accelerations between the interferometric mass and the associated apparatus. Here we propose a solution that works even without actively tracking the relative acceleration... |
gr-qc/9705004 | Vanzo Luciano | L. Vanzo | Black holes with unusual topology | 14 pages, standard latex, enlarged version, major conceptual changes,
more detailed calculations, new references added | Phys.Rev. D56 (1997) 6475-6483 | 10.1103/PhysRevD.56.6475 | UTF 400 | gr-qc | null | The Einstein's equations with a negative cosmological constant admit
solutions which are asymptotically anti-de Sitter space. Matter fields in
anti-de Sitter space can be in stable equilibrium even if the potential energy
is unbounded from below, violating the weak energy condition. Hence there is no
fundamental reas... | [
{
"created": "Mon, 5 May 1997 12:47:33 GMT",
"version": "v1"
},
{
"created": "Tue, 6 May 1997 15:23:02 GMT",
"version": "v2"
},
{
"created": "Wed, 21 May 1997 11:23:17 GMT",
"version": "v3"
}
] | 2009-10-30 | [
[
"Vanzo",
"L.",
""
]
] | The Einstein's equations with a negative cosmological constant admit solutions which are asymptotically anti-de Sitter space. Matter fields in anti-de Sitter space can be in stable equilibrium even if the potential energy is unbounded from below, violating the weak energy condition. Hence there is no fundamental reason... |
gr-qc/0406036 | Plamen Fiziev | P.P. Fiziev, T.L. Bojadjiev, D.A. Georgieva | Novel Properties of Bound States of Klein-Gordon Equation in
Gravitational Field of Massive Point | 10 pages, latex file, 10 figures, typos in the text and in the
figures corrected | null | null | SU-TH-04-06-01 | gr-qc | null | We consider for the first time the solutions of Klein-Gordon equation in
gravitational field of {\em a massive} point source in GR. We examine
numerically the basic bounded quantum state and the next few states in the
discrete spectrum for different values of the orbital momentum. A novel feature
of the solutions und... | [
{
"created": "Wed, 9 Jun 2004 17:22:33 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Jun 2004 10:01:30 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Jun 2004 14:02:30 GMT",
"version": "v3"
},
{
"created": "Thu, 30 Dec 2004 13:05:13 GMT",
"version": "v4"
},
{
"cr... | 2007-05-23 | [
[
"Fiziev",
"P. P.",
""
],
[
"Bojadjiev",
"T. L.",
""
],
[
"Georgieva",
"D. A.",
""
]
] | We consider for the first time the solutions of Klein-Gordon equation in gravitational field of {\em a massive} point source in GR. We examine numerically the basic bounded quantum state and the next few states in the discrete spectrum for different values of the orbital momentum. A novel feature of the solutions under... |
gr-qc/0306091 | Lluis Bel | Ll. Bel | Local Cosmology | 13 pages, Latex. Corrected typos | null | null | null | gr-qc | null | We define the concept of a Maximally symmetric osculating space-time at any
event of any given Robertson-Walker model. We use this definition in two
circumstances: i) to approximate any given cosmological model by a simpler one
sharing the same observational parameters, i.e, the speed of light, the Hubble
constant an... | [
{
"created": "Fri, 20 Jun 2003 07:06:46 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Nov 2006 09:59:33 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Bel",
"Ll.",
""
]
] | We define the concept of a Maximally symmetric osculating space-time at any event of any given Robertson-Walker model. We use this definition in two circumstances: i) to approximate any given cosmological model by a simpler one sharing the same observational parameters, i.e, the speed of light, the Hubble constant and ... |
1704.01899 | Yungui Gong | Shaoqi Hou, Yungui Gong, Yunqi Liu | Polarizations of Gravitational Waves in Horndeski Theory | 15 two column pages, 6 captioned figures, EPJC in press | Eur. Phys. J. C 78 (2018) 378 | 10.1140/epjc/s10052-018-5869-y | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the polarization content of gravitational waves in Horndeski
theory. Besides the familiar plus and cross polarizations in Einstein's General
Relativity, there is one more polarization state which is the mixture of the
transverse breathing and longitudinal polarizations.The additional mode is
excited by the... | [
{
"created": "Thu, 6 Apr 2017 15:53:29 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Apr 2017 12:40:37 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Oct 2017 10:42:57 GMT",
"version": "v3"
},
{
"created": "Sun, 13 May 2018 02:41:02 GMT",
"version": "v4"
}
] | 2018-05-15 | [
[
"Hou",
"Shaoqi",
""
],
[
"Gong",
"Yungui",
""
],
[
"Liu",
"Yunqi",
""
]
] | We analyze the polarization content of gravitational waves in Horndeski theory. Besides the familiar plus and cross polarizations in Einstein's General Relativity, there is one more polarization state which is the mixture of the transverse breathing and longitudinal polarizations.The additional mode is excited by the m... |
1302.2057 | Jose Manuel Velhinho | Jeronimo Cortez, Daniel Martin-de Blas, Guillermo A. Mena Marugan,
Jose M. Velhinho | Quantization of the massless scalar field in de Sitter spacetime with
unitary dynamics | 3 pages, contribution for the Proceedings of MG13, Stockholm, 2012 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a Fock quantization with unitary dynamics for the massless scalar
field in de Sitter spacetime.
| [
{
"created": "Fri, 8 Feb 2013 15:02:43 GMT",
"version": "v1"
}
] | 2013-02-11 | [
[
"Cortez",
"Jeronimo",
""
],
[
"Blas",
"Daniel Martin-de",
""
],
[
"Marugan",
"Guillermo A. Mena",
""
],
[
"Velhinho",
"Jose M.",
""
]
] | We present a Fock quantization with unitary dynamics for the massless scalar field in de Sitter spacetime. |
2305.08725 | Sebastian Schuster | Sebastian Schuster (Charles University of Prague) | Frenemies with Physicality: Manufacturing Manifold Metrics | 9 pages; Essay written for the Gravity Research Foundation 2023
Awards for Essays on Gravitation; only layout changes compared to submitted
version; comments welcome! | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Physicality has the bad habit of sneaking up on unsuspecting physicists.
Unfortunately, it comes in multitudinous incarnations, which will not always
make sense in a given situation. Breaching a warp drive metric with physical
arguments is all good, but often what counts as physicality here is but a mere
mask for som... | [
{
"created": "Mon, 15 May 2023 15:39:10 GMT",
"version": "v1"
}
] | 2023-05-16 | [
[
"Schuster",
"Sebastian",
"",
"Charles University of Prague"
]
] | Physicality has the bad habit of sneaking up on unsuspecting physicists. Unfortunately, it comes in multitudinous incarnations, which will not always make sense in a given situation. Breaching a warp drive metric with physical arguments is all good, but often what counts as physicality here is but a mere mask for somet... |
gr-qc/0206046 | Hiroshi Watabe | Hiroshi Watabe and Takashi Torii (Waseda University) | Polar Perturbations of Self-gravitating Supermassive Global Monopoles | 10 pages, 6 figures, corrected some type mistakes (already corrected
in PRD version) | Phys.Rev. D66 (2002) 085019 | 10.1103/PhysRevD.66.085019 | WU-AP/149/02 | gr-qc hep-th | null | Spontaneous global symmetry breaking of O(3) scalar field gives rise to
point-like topological defects, global monopoles. By taking into account
self-gravity,the qualitative feature of the global monopole solutions depends
on the vacuum expectation value v of the scalar field. When v < sqrt{1 / 8 pi},
there are globa... | [
{
"created": "Mon, 17 Jun 2002 14:07:35 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Aug 2002 07:55:01 GMT",
"version": "v2"
},
{
"created": "Fri, 20 Sep 2002 08:37:38 GMT",
"version": "v3"
},
{
"created": "Mon, 2 Dec 2002 03:11:27 GMT",
"version": "v4"
}
] | 2009-11-07 | [
[
"Watabe",
"Hiroshi",
"",
"Waseda University"
],
[
"Torii",
"Takashi",
"",
"Waseda University"
]
] | Spontaneous global symmetry breaking of O(3) scalar field gives rise to point-like topological defects, global monopoles. By taking into account self-gravity,the qualitative feature of the global monopole solutions depends on the vacuum expectation value v of the scalar field. When v < sqrt{1 / 8 pi}, there are global ... |
gr-qc/0109055 | null | Dhurjati Prasad Datta (North Eastern Regional Institute of Science and
Technology) | Time inversion, Self-similar evolution, and Issue of time | Latex 2e, 17 pages, no figure | null | null | null | gr-qc | null | We investigate the question, "how does time flow?" and show that time may
change by inversions as well. We discuss its implications to a simple class of
linear systems. Instead of introducing any unphysical behaviour, inversions can
lead to a new multi- time scale evolutionary path for the linear system
exhibiting la... | [
{
"created": "Mon, 17 Sep 2001 12:34:52 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Datta",
"Dhurjati Prasad",
"",
"North Eastern Regional Institute of Science and\n Technology"
]
] | We investigate the question, "how does time flow?" and show that time may change by inversions as well. We discuss its implications to a simple class of linear systems. Instead of introducing any unphysical behaviour, inversions can lead to a new multi- time scale evolutionary path for the linear system exhibiting late... |
1406.0577 | Xin-Zhou Li | Hongsheng Zhang, Yapeng Hu, Xin-Zhou Li | Misner-Sharp Mass in $N$-dimensional $f(R)$ Gravity | 8 pages | Phys. Rev. D 90, 024062, 2014 | 10.1103/PhysRevD.90.024062 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Misner-Sharp mass for the $f(R)$ gravity in an $n$-dimensional
(n$\geq$3) spacetime which permits three-type $(n-2)$-dimensional maximally
symmetric subspace. We obtain the Misner-Sharp mass via two approaches. One is
the inverse unified first law method, and the other is the conserved charge
method by u... | [
{
"created": "Tue, 3 Jun 2014 05:15:37 GMT",
"version": "v1"
}
] | 2014-11-27 | [
[
"Zhang",
"Hongsheng",
""
],
[
"Hu",
"Yapeng",
""
],
[
"Li",
"Xin-Zhou",
""
]
] | We study the Misner-Sharp mass for the $f(R)$ gravity in an $n$-dimensional (n$\geq$3) spacetime which permits three-type $(n-2)$-dimensional maximally symmetric subspace. We obtain the Misner-Sharp mass via two approaches. One is the inverse unified first law method, and the other is the conserved charge method by usi... |
1101.2991 | Peter Hogan | P. A. Hogan and S. O'Farrell | Modeling Background Radiation in Isotropic Cosmologies | 15 pages, Latex file, accepted for publication in General Relativity
and Gravitation | Gen.Rel.Grav.43:1625-1638,2011 | 10.1007/s10714-011-1144-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using explicit perturbations of isotropic cosmological models which describe
simple gravitational waves, an isotropic tensor having the algebraic symmetries
of the Bel-Robinson tensor is derived as a model of cosmic background
gravitational radiation and this is used to provide an answer to the question:
in what sens... | [
{
"created": "Sat, 15 Jan 2011 14:43:20 GMT",
"version": "v1"
}
] | 2011-05-09 | [
[
"Hogan",
"P. A.",
""
],
[
"O'Farrell",
"S.",
""
]
] | Using explicit perturbations of isotropic cosmological models which describe simple gravitational waves, an isotropic tensor having the algebraic symmetries of the Bel-Robinson tensor is derived as a model of cosmic background gravitational radiation and this is used to provide an answer to the question: in what sense ... |
0902.1583 | Kentarou Tanabe | Kentaro Tanabe, Norihiro Tanahashi, Tetsuya Shiromizu | Asymptotic flatness at spatial infinity in higher dimensions | 10 pages | J.Math.Phys.50:072502,2009 | 10.1063/1.3166141 | null | gr-qc hep-th | http://creativecommons.org/licenses/publicdomain/ | A definition of asymptotic flatness at spatial infinity in $d$ dimensions
($d\geq 4$) is given using the conformal completion approach. Then we discuss
asymptotic symmetry and conserved quantities. As in four dimensions, in $d$
dimensions we should impose a condition at spatial infinity that the "magnetic"
part of th... | [
{
"created": "Tue, 10 Feb 2009 05:46:25 GMT",
"version": "v1"
}
] | 2009-11-19 | [
[
"Tanabe",
"Kentaro",
""
],
[
"Tanahashi",
"Norihiro",
""
],
[
"Shiromizu",
"Tetsuya",
""
]
] | A definition of asymptotic flatness at spatial infinity in $d$ dimensions ($d\geq 4$) is given using the conformal completion approach. Then we discuss asymptotic symmetry and conserved quantities. As in four dimensions, in $d$ dimensions we should impose a condition at spatial infinity that the "magnetic" part of the ... |
gr-qc/0512033 | Carsten Schneemann | Sascha Husa, Carsten Schneemann, Tilman Vogel, Anil Zenginoglu | Hyperboloidal data and evolution | 11 pages, 9 figures. To appear in the Proceedings of the Spanish
Relativity Meeting (ERE 2005), Oviedo, Spain, 6-10 Sept 2005 | null | 10.1063/1.2218186 | AEI-2005-183 | gr-qc | null | We discuss the hyperboloidal evolution problem in general relativity from a
numerical perspective, and present some new results. Families of initial data
which are the hyperboloidal analogue of Brill waves are constructed
numerically, and a systematic search for apparent horizons is performed.
Schwarzschild-Kruskal s... | [
{
"created": "Tue, 6 Dec 2005 15:46:28 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Husa",
"Sascha",
""
],
[
"Schneemann",
"Carsten",
""
],
[
"Vogel",
"Tilman",
""
],
[
"Zenginoglu",
"Anil",
""
]
] | We discuss the hyperboloidal evolution problem in general relativity from a numerical perspective, and present some new results. Families of initial data which are the hyperboloidal analogue of Brill waves are constructed numerically, and a systematic search for apparent horizons is performed. Schwarzschild-Kruskal spa... |
0901.1472 | Valeri Frolov | Valeri P. Frolov | Hidden Symmetries and Black Holes | 13 pages, 3 figures. To appear in the proceedings of the NEB-13
conference | J.Phys.Conf.Ser.189:012015,2009 | 10.1088/1742-6596/189/1/012015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper contains a brief review of recent results on hidden symmetries in
higher dimensional black hole spacetimes. We show how the existence of a
principal CKY tensor (that is a closed conformal Killing-Yano 2-form) allows
one to generate a `tower' of Killing-Yano and Killing tensors responsible for
hidden symmetr... | [
{
"created": "Sun, 11 Jan 2009 21:46:11 GMT",
"version": "v1"
}
] | 2009-11-05 | [
[
"Frolov",
"Valeri P.",
""
]
] | The paper contains a brief review of recent results on hidden symmetries in higher dimensional black hole spacetimes. We show how the existence of a principal CKY tensor (that is a closed conformal Killing-Yano 2-form) allows one to generate a `tower' of Killing-Yano and Killing tensors responsible for hidden symmetrie... |
gr-qc/9911097 | Alejandro Jakubi | Luis P. Chimento, Alejandro S. Jakubi and Diego Pavon | Stable Inflationary Dissipative Cosmologies | 13 pages, LaTeX 2.09, 1 figure. To be published in International
Journal of Modern Physics D | Int.J.Mod.Phys.D9:43-55,2000 | 10.1142/S0218271800000050 | null | gr-qc | null | The stability of the de Sitter era of cosmic expansion in spatially curved
homogeneous isotropic universes is studied. The source of the gravitational
field is an imperfect fluid such that the parameters that characterize it may
change with time. In this way we extend our previous analysis for
spatially-flat spaces a... | [
{
"created": "Thu, 25 Nov 1999 00:54:13 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Chimento",
"Luis P.",
""
],
[
"Jakubi",
"Alejandro S.",
""
],
[
"Pavon",
"Diego",
""
]
] | The stability of the de Sitter era of cosmic expansion in spatially curved homogeneous isotropic universes is studied. The source of the gravitational field is an imperfect fluid such that the parameters that characterize it may change with time. In this way we extend our previous analysis for spatially-flat spaces as ... |
2012.14443 | Parampreet Singh | Kristina Giesel, Bao-Fei Li, Parampreet Singh | Relating dust reference models to conventional systems in manifestly
gauge invariant perturbation theory | Revised version with expanded discussion, new appendix and title
change. To appear in PRD | Phys. Rev. D 104, 023501 (2021) | 10.1103/PhysRevD.104.023501 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Models with dust reference fields in relational formalism have proved useful
in understanding the construction of gauge-invariant perturbation theory to
arbitrary orders in the canonical framework. These reference fields modify the
dynamical equations for perturbation equations. However, important questions
remain op... | [
{
"created": "Mon, 28 Dec 2020 19:00:20 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Jun 2021 11:41:47 GMT",
"version": "v2"
}
] | 2021-07-07 | [
[
"Giesel",
"Kristina",
""
],
[
"Li",
"Bao-Fei",
""
],
[
"Singh",
"Parampreet",
""
]
] | Models with dust reference fields in relational formalism have proved useful in understanding the construction of gauge-invariant perturbation theory to arbitrary orders in the canonical framework. These reference fields modify the dynamical equations for perturbation equations. However, important questions remain open... |
1506.06152 | Abhay Ashtekar | Abhay Ashtekar, B\'eatrice Bonga and Aruna Kesavan | Asymptotics with a positive cosmological constant: II. Linear fields on
de Sitter space-time | 22 pages, 4 figures. Added two clarifications in section V (on the
use of the Poincar\'e patch and on the relation with Friedrich's result [19]
in full GR). We thank the referee for bringing to our attention Ref [19].
Version to appear in PRD | Phys. Rev. D 92, 044011 (2015) | 10.1103/PhysRevD.92.044011 | IGC/2015/6-5 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Linearized gravitational waves in de Sitter space-time are analyzed in detail
to obtain guidance for constructing the theory of gravitational radiation in
presence of a positive cosmological constant in full, nonlinear general
relativity. Specifically: i) In the exact theory, the intrinsic geometry of
$\scri$ is ofte... | [
{
"created": "Fri, 19 Jun 2015 20:33:05 GMT",
"version": "v1"
},
{
"created": "Sun, 19 Jul 2015 13:26:10 GMT",
"version": "v2"
}
] | 2015-09-02 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Bonga",
"Béatrice",
""
],
[
"Kesavan",
"Aruna",
""
]
] | Linearized gravitational waves in de Sitter space-time are analyzed in detail to obtain guidance for constructing the theory of gravitational radiation in presence of a positive cosmological constant in full, nonlinear general relativity. Specifically: i) In the exact theory, the intrinsic geometry of $\scri$ is often ... |
1109.4014 | Kumar S. Gupta | S. Digal, T. R. Govindarajan, Kumar S. Gupta and X. Martin | Phase structure of fuzzy black holes | 18 pages, 4 figures, minor changes in the text | null | 10.1007/JHEP01(2012)027 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Noncommutative deformations of the BTZ blackholes are described by
noncommutative cylinders. We study the scalar fields in this background. The
spectrum is studied analytically and through numerical simulations we establish
the existence of novel `stripe phases'. These are different from stripes on
Moyal spaces and s... | [
{
"created": "Mon, 19 Sep 2011 12:54:35 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Jan 2012 12:54:12 GMT",
"version": "v2"
}
] | 2015-05-30 | [
[
"Digal",
"S.",
""
],
[
"Govindarajan",
"T. R.",
""
],
[
"Gupta",
"Kumar S.",
""
],
[
"Martin",
"X.",
""
]
] | Noncommutative deformations of the BTZ blackholes are described by noncommutative cylinders. We study the scalar fields in this background. The spectrum is studied analytically and through numerical simulations we establish the existence of novel `stripe phases'. These are different from stripes on Moyal spaces and sta... |
1105.0147 | Christian Corda cordac | Christian Corda, Herman J. Mosquera Cuesta, Roberto Lorduy G\`omez | High-energy scalarons in R^{2} gravity as a model for Dark Matter in
galaxies | 25 pages. Definitive version accepted for publication in
Astroparticle Physics | Astropart. Phys. 35, 362-370 (2012) | 10.1016/j.astropartphys.2011.08.009 | null | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that in the framework of R^{2} gravity and in the linearized approach
it is possible to obtain spherically symmetric stationary states that can be
used as a model for galaxies. The model can also help to have a better
understanding on the theoretical basis of Einstein-Vlasov systems.
Specifically, we discuss,... | [
{
"created": "Sun, 1 May 2011 07:09:56 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Aug 2011 14:55:36 GMT",
"version": "v2"
}
] | 2011-12-13 | [
[
"Corda",
"Christian",
""
],
[
"Cuesta",
"Herman J. Mosquera",
""
],
[
"Gòmez",
"Roberto Lorduy",
""
]
] | We show that in the framework of R^{2} gravity and in the linearized approach it is possible to obtain spherically symmetric stationary states that can be used as a model for galaxies. The model can also help to have a better understanding on the theoretical basis of Einstein-Vlasov systems. Specifically, we discuss, i... |
gr-qc/0404059 | Jonathan Thornburg | Jonathan Thornburg | Black Hole Excision with Multiple Grid Patches | 31 pages, revtex4, includes color postscript figures, mpeg movies
available at http://www.aei.mpg.de/~jthorn/research/mpe/movies/, v4 = final
version as published = v3 + correct acknowledgments + correct grid pars in
table 1 | Class.Quant.Grav. 21 (2004) 3665-3692 | 10.1088/0264-9381/21/15/004 | AEI-2004-032 | gr-qc | null | When using black hole excision to numerically evolve a black hole spacetime
with no continuous symmetries, most 3+1 finite differencing codes use a
Cartesian grid. It's difficult to do excision on such a grid, because the
natural $r = \text{constant}$ excision surface must be approximated either by a
very different s... | [
{
"created": "Tue, 13 Apr 2004 15:59:42 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Apr 2004 15:21:40 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Jun 2004 18:38:17 GMT",
"version": "v3"
},
{
"created": "Fri, 16 Jul 2004 13:58:58 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Thornburg",
"Jonathan",
""
]
] | When using black hole excision to numerically evolve a black hole spacetime with no continuous symmetries, most 3+1 finite differencing codes use a Cartesian grid. It's difficult to do excision on such a grid, because the natural $r = \text{constant}$ excision surface must be approximated either by a very different sha... |
2001.11837 | YongJun Cao | Qian Moxian, Li Xi-Bin, Cao Yongjun | Gravitation induced shrinkage of Mercury's orbit | 6 pages, 0 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In general relativity, the Mercury's orbit becomes approximately elliptical
and the its perihelion has thus an additional advance. We demonstrate,
meanwhile, that in comparison of those given by the Newton's theory of
gravitation for the orbit of the Mercury, the circumference and the area are
reduced by $40.39$ km a... | [
{
"created": "Fri, 31 Jan 2020 13:55:52 GMT",
"version": "v1"
}
] | 2020-02-03 | [
[
"Moxian",
"Qian",
""
],
[
"Xi-Bin",
"Li",
""
],
[
"Yongjun",
"Cao",
""
]
] | In general relativity, the Mercury's orbit becomes approximately elliptical and the its perihelion has thus an additional advance. We demonstrate, meanwhile, that in comparison of those given by the Newton's theory of gravitation for the orbit of the Mercury, the circumference and the area are reduced by $40.39$ km and... |
1707.03666 | M. Farasat Shamir | M. Farasat Shamir, M. Atif Fayyaz | Dissipative Cylindrical Collapse of a Charged Anisotropic Fluid in
$f(R)$ Gravity | 20 pages, accepted for publication in Canadian Journal of Physics | Can. J. Phys. 95(2017)1278 | 10.1139/cjp-2017-0104 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to investigate the cylindrical collapse of an
anisotropic fluid in $f(R)$ gravity. For this purpose, the viscous charged
anisotropic fluid dissipating energy with heat flow and shear is assumed. We
use the perturbation scheme to develop the dynamical equations for the
variables that ultimately l... | [
{
"created": "Tue, 11 Jul 2017 15:13:24 GMT",
"version": "v1"
}
] | 2017-12-07 | [
[
"Shamir",
"M. Farasat",
""
],
[
"Fayyaz",
"M. Atif",
""
]
] | This paper is devoted to investigate the cylindrical collapse of an anisotropic fluid in $f(R)$ gravity. For this purpose, the viscous charged anisotropic fluid dissipating energy with heat flow and shear is assumed. We use the perturbation scheme to develop the dynamical equations for the variables that ultimately lea... |
1507.05216 | Iver Brevik | I. Brevik, V. V. Obukhov and A. V. Timoshkin | Cosmological Models Coupled with Dark Matter in a Dissipative Universe | 6 pages, no figures; to appear in Astrophysics and Space Science | null | 10.1007/s10509-015-2451-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the cosmological system with two interacting fluids: dark energy
and dark matter, in a homogeneous and isotropic universe with dissipation. The
modified gravitational equation for dark matter is solved. The analytic
representations for the Little Rip, the Pseudo Rip, and the bounce cosmology
models with d... | [
{
"created": "Sat, 18 Jul 2015 18:55:44 GMT",
"version": "v1"
}
] | 2015-08-19 | [
[
"Brevik",
"I.",
""
],
[
"Obukhov",
"V. V.",
""
],
[
"Timoshkin",
"A. V.",
""
]
] | We consider the cosmological system with two interacting fluids: dark energy and dark matter, in a homogeneous and isotropic universe with dissipation. The modified gravitational equation for dark matter is solved. The analytic representations for the Little Rip, the Pseudo Rip, and the bounce cosmology models with dis... |
1205.2287 | Evan Ochsner | Evan Ochsner and Richard O'Shaughnessy (UWM) | Asymptotic frame selection for binary black hole spacetimes II:
Post-Newtonian limit | 12 pages, 4 figures | null | 10.1103/PhysRevD.86.104037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One way to select a preferred frame from gravitational radiation is via the
principal axes of < L L>, an average of the action of rotation group generators
on the Weyl tensor at asymptotic infinity. In this paper we evaluate this
time-domain average for a quasicircular binary using approximate
(post-Newtonian) wavefo... | [
{
"created": "Thu, 10 May 2012 15:01:54 GMT",
"version": "v1"
}
] | 2013-05-30 | [
[
"Ochsner",
"Evan",
"",
"UWM"
],
[
"O'Shaughnessy",
"Richard",
"",
"UWM"
]
] | One way to select a preferred frame from gravitational radiation is via the principal axes of < L L>, an average of the action of rotation group generators on the Weyl tensor at asymptotic infinity. In this paper we evaluate this time-domain average for a quasicircular binary using approximate (post-Newtonian) waveform... |
1812.11025 | Davood Mahdavian Yekta | Majid Karimabadi, S. Aliasghar Alavi, Davood Mahdavian Yekta | Non-commutative effects on gravitational measurements | 21 pages, 9 figures and one table. arXiv admin note: text overlap
with arXiv:1412.6036 by other authors | Class.Quant.Grav. 37 (2020) 8, 085009 | 10.1088/1361-6382/ab7693 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The general theory of relativity is currently the accepted theory of gravity
and as such, a large repository of test results has been obtained since its
inception in 1915. However, in this paper we only focus on what are considered
as the main tests but in non-commutative (NC) geometries. Using the coordinate
coheren... | [
{
"created": "Wed, 26 Dec 2018 09:53:24 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Apr 2020 10:09:49 GMT",
"version": "v2"
}
] | 2020-04-20 | [
[
"Karimabadi",
"Majid",
""
],
[
"Alavi",
"S. Aliasghar",
""
],
[
"Yekta",
"Davood Mahdavian",
""
]
] | The general theory of relativity is currently the accepted theory of gravity and as such, a large repository of test results has been obtained since its inception in 1915. However, in this paper we only focus on what are considered as the main tests but in non-commutative (NC) geometries. Using the coordinate coherent ... |
1509.08771 | Victor Ars\`ene Kpadonou | A. V. Kpadonou, M. J. S. Houndjo, M. E. Rodrigues | Tolman-Oppenheimer-Volkoff Equations and their implications or the
structures of relativistic Stars in f(T) gravity | null | Astrophys. Space Sci. (2016) 361:244 | 10.1007/s10509-016-2805-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate in this paper the structures of neutron and quark stars in
f(T) theory of gravity where T denotes the torsion scalar. Attention is
attached to the TOV type equations of this theory and numerical integrations of
these equations are performed with suitable EoS. We search for the deviation of
the mass-rad... | [
{
"created": "Sun, 27 Sep 2015 17:45:29 GMT",
"version": "v1"
}
] | 2016-11-29 | [
[
"Kpadonou",
"A. V.",
""
],
[
"Houndjo",
"M. J. S.",
""
],
[
"Rodrigues",
"M. E.",
""
]
] | We investigate in this paper the structures of neutron and quark stars in f(T) theory of gravity where T denotes the torsion scalar. Attention is attached to the TOV type equations of this theory and numerical integrations of these equations are performed with suitable EoS. We search for the deviation of the mass-radiu... |
1507.01689 | Ragavachariar Parthasarathy | R. Parthasarathy | Five dimensional Gravity and Big Bang Singularity | A more complete version appeared in arXiv:1702.05231 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A 5-dimensional gravity theory, motivated by the brane world picture, with
factorisable metric and with Kaluza scalar $G_{55}(r)$, is shown to give rise
to a positive contribution to the Raychaudhuri equation. This inhibits the
focusing of geodesics and possibly cause non-focusing of the geodesics. This
feature is tr... | [
{
"created": "Tue, 7 Jul 2015 07:18:09 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Feb 2018 08:43:53 GMT",
"version": "v2"
}
] | 2018-08-29 | [
[
"Parthasarathy",
"R.",
""
]
] | A 5-dimensional gravity theory, motivated by the brane world picture, with factorisable metric and with Kaluza scalar $G_{55}(r)$, is shown to give rise to a positive contribution to the Raychaudhuri equation. This inhibits the focusing of geodesics and possibly cause non-focusing of the geodesics. This feature is tran... |
0809.2911 | Jose Geraldo Pereira | R. Aldrovandi, J. G. Pereira, Roldao da Rocha, K. H. Vu | Nonlinear Gravitational Waves: Their Form and Effects | 15 pages, no figures. v2: presentation changes aiming at clarifying
the text; matches published version | Int.J.Theor.Phys.49:549-563,2010 | 10.1007/s10773-009-0236-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A gravitational wave must be nonlinear to be able to transport its own
source, that is, energy and momentum. A physical gravitational wave, therefore,
cannot be represented by a solution to a linear wave equation. Relying on this
property, the second-order solution describing such physical waves is obtained.
The effe... | [
{
"created": "Wed, 17 Sep 2008 11:31:48 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Feb 2010 17:13:07 GMT",
"version": "v2"
}
] | 2010-03-02 | [
[
"Aldrovandi",
"R.",
""
],
[
"Pereira",
"J. G.",
""
],
[
"da Rocha",
"Roldao",
""
],
[
"Vu",
"K. H.",
""
]
] | A gravitational wave must be nonlinear to be able to transport its own source, that is, energy and momentum. A physical gravitational wave, therefore, cannot be represented by a solution to a linear wave equation. Relying on this property, the second-order solution describing such physical waves is obtained. The effect... |
0902.3978 | Emmanuil Saridakis | Emmanuel N. Saridakis | Phantom evolution in power-law potentials | 7 pages, 3 figures, version published in Nucl. Phys. B | null | 10.1016/j.nuclphysb.2009.04.011 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate phantom models with power-law potentials and we extract the
early-time, "tracker", solutions under the assumption of matter domination.
Contrary to quintessence case, we find that energy positivity requires normal
power-law potentials instead of inverse power-law ones, with the potential
exponent being... | [
{
"created": "Mon, 23 Feb 2009 19:32:32 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Apr 2009 23:54:16 GMT",
"version": "v2"
}
] | 2015-05-13 | [
[
"Saridakis",
"Emmanuel N.",
""
]
] | We investigate phantom models with power-law potentials and we extract the early-time, "tracker", solutions under the assumption of matter domination. Contrary to quintessence case, we find that energy positivity requires normal power-law potentials instead of inverse power-law ones, with the potential exponent being b... |
1810.07607 | Flavio Bombacigno | Flavio Bombacigno and Giovanni Montani | Implications of the Holst term in a $f(R)$ theory with torsion | 8 pages, 4 figures, accepted for publication in Physical Review D | Phys. Rev. D 99, 064016 (2019) | 10.1103/PhysRevD.99.064016 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We analyze a modified $f(R)$ theory of gravity in the Palatini formulation,
when an Holst term endowed with a dynamical Immirzi field is included. We study
the basic features of the model, especially in view of liminating the torsion
field via the Immirzi field and the scalar-tensor degrees of freedom of the
$f(R)$ m... | [
{
"created": "Wed, 17 Oct 2018 15:19:02 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Mar 2019 09:39:23 GMT",
"version": "v2"
}
] | 2019-03-27 | [
[
"Bombacigno",
"Flavio",
""
],
[
"Montani",
"Giovanni",
""
]
] | We analyze a modified $f(R)$ theory of gravity in the Palatini formulation, when an Holst term endowed with a dynamical Immirzi field is included. We study the basic features of the model, especially in view of liminating the torsion field via the Immirzi field and the scalar-tensor degrees of freedom of the $f(R)$ mod... |
gr-qc/9711044 | Aros Olmedo Rodrigo | Rodrigo M Aros and Nelson Zamorano | A Wormhole at the core of an infinite cosmic string | 1 tex file and 5 eps files. To be Published in Nov. in Phys.Rev. D | Phys.Rev.D56:6607-6614,1997 | 10.1103/PhysRevD.56.6607 | null | gr-qc | null | We study a solution of Einstein's equations that describes a straight cosmic
string with a variable angular deficit, starting with a $2 \pi$ deficit at the
core. We show that the coordinate singularity associated to this defect can be
interpreted as a traversible wormhole lodging at the the core of the string. A
nega... | [
{
"created": "Thu, 13 Nov 1997 13:53:07 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Aros",
"Rodrigo M",
""
],
[
"Zamorano",
"Nelson",
""
]
] | We study a solution of Einstein's equations that describes a straight cosmic string with a variable angular deficit, starting with a $2 \pi$ deficit at the core. We show that the coordinate singularity associated to this defect can be interpreted as a traversible wormhole lodging at the the core of the string. A negati... |
2305.17453 | N\'ickolas De Aguiar Alves | N\'ickolas de Aguiar Alves | Nonperturbative Aspects of Quantum Field Theory in Curved Spacetime | MSc thesis defended at the Federal University of ABC (Brazil) on 28
April 2023. xxiv + 152 pages, 22 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Quantum field theory in curved spacetime is perhaps the most reliable
framework in which one can investigate quantum effects in the presence of
strong gravitational fields. Nevertheless, it is often studied by means of
perturbative treatments. In this thesis, we aim at using the functional
renormalization group -- a ... | [
{
"created": "Tue, 23 May 2023 22:34:24 GMT",
"version": "v1"
}
] | 2023-05-30 | [
[
"Alves",
"Níckolas de Aguiar",
""
]
] | Quantum field theory in curved spacetime is perhaps the most reliable framework in which one can investigate quantum effects in the presence of strong gravitational fields. Nevertheless, it is often studied by means of perturbative treatments. In this thesis, we aim at using the functional renormalization group -- a no... |
0802.0637 | Plyatsko Roman | Roman Plyatsko | Highly Relativistic Motions of Spinning Particles According to Mathisson
Equations | 6 pages, invited paper presented at the Mathisson Conference (17-20
October2007, Warsaw), to appear in Acta Phys. Pol. B | Acta Phys.Polon.Supp.1:173-178,2008 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The physical effects following from the Mathisson equations at the highly
relativistic motions of a spinning test particle relative to a Schwarzschild
mass are discussed. The corresponding numerical estimates are presented.
| [
{
"created": "Tue, 5 Feb 2008 15:21:55 GMT",
"version": "v1"
}
] | 2009-02-10 | [
[
"Plyatsko",
"Roman",
""
]
] | The physical effects following from the Mathisson equations at the highly relativistic motions of a spinning test particle relative to a Schwarzschild mass are discussed. The corresponding numerical estimates are presented. |
gr-qc/0209115 | Mark A. Scheel | Mark A. Scheel, Lawrence E. Kidder, Lee Lindblom, Harald P. Pfeiffer,
and Saul A. Teukolsky | Toward stable 3D numerical evolutions of black-hole spacetimes | 4 pages, 5 figures. To appear in Phys. Rev. D. Minor additions to
text for clarification. Added short paragraph about inner boundary dependence | Phys.Rev. D66 (2002) 124005 | 10.1103/PhysRevD.66.124005 | null | gr-qc | null | Three dimensional (3D) numerical evolutions of static black holes with
excision are presented. These evolutions extend to about 8000M, where M is the
mass of the black hole. This degree of stability is achieved by using
growth-rate estimates to guide the fine tuning of the parameters in a
multi-parameter family of sy... | [
{
"created": "Mon, 30 Sep 2002 17:28:06 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Oct 2002 15:24:18 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Scheel",
"Mark A.",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Lindblom",
"Lee",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Teukolsky",
"Saul A.",
""
]
] | Three dimensional (3D) numerical evolutions of static black holes with excision are presented. These evolutions extend to about 8000M, where M is the mass of the black hole. This degree of stability is achieved by using growth-rate estimates to guide the fine tuning of the parameters in a multi-parameter family of symm... |
gr-qc/9403059 | Melnikov Vitaly Nikolaevich | A.D.Alexeev, K.A.Bronnikov, N.I.Kolosnitsyn, M.Yu.Konstantinov,
V.N.Melnikov and A.G.Radynov | On Possible Measurement of Gravitational Interaction Parameters on Board
a Satellite | (only two misprints on title page) 7 pages | null | null | RGA-CSVR-001/94 | gr-qc | null | The recently suggested SEE (Satellite Energy Exchange) method of measuring
the gravitational constant $G$, possible equivalence principle violation
(measured by the E\"{o}tv\"{o}s parameter $\eta$) and the hypothetic 5th force
parameters $\alpha$ and $\lambda$ on board a drag-free Earth's satellite is
discussed and f... | [
{
"created": "Tue, 29 Mar 1994 15:24:54 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Mar 1994 15:48:17 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Alexeev",
"A. D.",
""
],
[
"Bronnikov",
"K. A.",
""
],
[
"Kolosnitsyn",
"N. I.",
""
],
[
"Konstantinov",
"M. Yu.",
""
],
[
"Melnikov",
"V. N.",
""
],
[
"Radynov",
"A. G.",
""
]
] | The recently suggested SEE (Satellite Energy Exchange) method of measuring the gravitational constant $G$, possible equivalence principle violation (measured by the E\"{o}tv\"{o}s parameter $\eta$) and the hypothetic 5th force parameters $\alpha$ and $\lambda$ on board a drag-free Earth's satellite is discussed and fur... |
gr-qc/0410054 | Abhay Ashtekar | Abhay Ashtekar | Gravity and the Quantum | A general review of quantum gravity addresed non-experts. To appear
in the special issue `Space-time Hundred Years Later' of NJP; J.Pullin and R.
Price (editors). Typos and an attribution corrected; a clarification added in
section 2.C | New J.Phys. 7 (2005) 198 | 10.1088/1367-2630/7/1/198 | IGPG/04/10-3 | gr-qc | null | The goal of this article is to present a broad perspective on quantum gravity
for \emph{non-experts}. After a historical introduction, key physical problems
of quantum gravity are illustrated. While there are a number of interesting and
insightful approaches to address these issues, over the past two decades
sustaine... | [
{
"created": "Wed, 13 Oct 2004 18:12:52 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Oct 2004 15:40:35 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Ashtekar",
"Abhay",
""
]
] | The goal of this article is to present a broad perspective on quantum gravity for \emph{non-experts}. After a historical introduction, key physical problems of quantum gravity are illustrated. While there are a number of interesting and insightful approaches to address these issues, over the past two decades sustained ... |
gr-qc/9410003 | S. Husa | Robert Beig and Sascha Husa | Initial Data for General Relativity with Toroidal Conformal Symmetry | REVTEX, 9 pages, ESI Preprint 126 | Phys.Rev.D50:7116-7118,1994 | 10.1103/PhysRevD.50.R7116 | null | gr-qc | null | A new class of time-symmetric solutions to the initial value constraints of
vacuum General Relativity is introduced. These data are globally regular,
asymptotically flat (with possibly several asymptotic ends) and in general have
no isometries, but a $U(1)\times U(1)$ group of conformal isometries. After
decomposing ... | [
{
"created": "Tue, 4 Oct 1994 16:10:51 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Beig",
"Robert",
""
],
[
"Husa",
"Sascha",
""
]
] | A new class of time-symmetric solutions to the initial value constraints of vacuum General Relativity is introduced. These data are globally regular, asymptotically flat (with possibly several asymptotic ends) and in general have no isometries, but a $U(1)\times U(1)$ group of conformal isometries. After decomposing th... |
gr-qc/0412139 | Tsutomu Kobayashi | Tsutomu Kobayashi, Takahiro Tanaka | Five-dimensional black strings in Einstein-Gauss-Bonnet gravity | 11 pages, 8 figures. v2: typos corrected. Comments, references added.
v3: references added | Phys.Rev. D71 (2005) 084005 | 10.1103/PhysRevD.71.084005 | KUNS-1954 | gr-qc hep-th | null | We consider black-string-type solutions in five-dimensional
Einstein-Gauss-Bonnet gravity. Numerically constructed solutions under static,
axially symmetric and translationally invariant metric ansatz are presented.
The solutions are specified by two asymptotic charges: mass of a black string
and a scalar charge asso... | [
{
"created": "Thu, 30 Dec 2004 21:47:03 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Mar 2005 02:39:28 GMT",
"version": "v2"
},
{
"created": "Sat, 16 Apr 2005 14:28:57 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Kobayashi",
"Tsutomu",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | We consider black-string-type solutions in five-dimensional Einstein-Gauss-Bonnet gravity. Numerically constructed solutions under static, axially symmetric and translationally invariant metric ansatz are presented. The solutions are specified by two asymptotic charges: mass of a black string and a scalar charge associ... |
1507.02262 | Julio Fernando Abalos | Fernando Abalos, Federico Carrasco, \'Erico Goulart, Oscar Reula | Nonlinear electrodynamics as a symmetric hyperbolic system | null | Phys. Rev. D 92, 084024 (2015) | 10.1103/PhysRevD.92.084024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nonlinear theories generalizing Maxwell's electromagnetism and arising from a
Lagrangian formalism have dispersion relations in which propagation planes
factor into null planes corresponding to two effective metrics which depend on
the point-wise values of the electromagnetic field. These effective Lorentzian
metrics... | [
{
"created": "Wed, 8 Jul 2015 19:15:09 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Jul 2015 16:47:23 GMT",
"version": "v2"
}
] | 2015-10-14 | [
[
"Abalos",
"Fernando",
""
],
[
"Carrasco",
"Federico",
""
],
[
"Goulart",
"Érico",
""
],
[
"Reula",
"Oscar",
""
]
] | Nonlinear theories generalizing Maxwell's electromagnetism and arising from a Lagrangian formalism have dispersion relations in which propagation planes factor into null planes corresponding to two effective metrics which depend on the point-wise values of the electromagnetic field. These effective Lorentzian metrics s... |
1612.01269 | Somenath Chakrabarty | Soma Mitra, Sanchita Das and Somenath Chakrabarty | Time Dependent Rindler Hamiltonian Eigen States in Momentum Space | nine pages REVTEX file with six .eps figures (included) new
conclusion is added | null | null | null | gr-qc astro-ph.HE quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have developed a formalism to get the time evolution of the eigen states
of Rindler Hamiltonian in momentum space. We have shown the difficulties with
characteristic curves, and re-cast the time evolution equations in the form of
two-dimensional Laplace equation. The solutions are obtain both in polar
coordinates ... | [
{
"created": "Mon, 5 Dec 2016 08:08:30 GMT",
"version": "v1"
},
{
"created": "Sat, 31 Dec 2016 05:30:05 GMT",
"version": "v2"
},
{
"created": "Mon, 16 Jan 2017 09:57:29 GMT",
"version": "v3"
},
{
"created": "Thu, 22 Aug 2019 10:50:12 GMT",
"version": "v4"
}
] | 2019-08-23 | [
[
"Mitra",
"Soma",
""
],
[
"Das",
"Sanchita",
""
],
[
"Chakrabarty",
"Somenath",
""
]
] | We have developed a formalism to get the time evolution of the eigen states of Rindler Hamiltonian in momentum space. We have shown the difficulties with characteristic curves, and re-cast the time evolution equations in the form of two-dimensional Laplace equation. The solutions are obtain both in polar coordinates as... |
1512.00221 | Norbert Bodendorfer | Norbert Bodendorfer, Antonia Zipfel | On the relation between reduced quantisation and quantum reduction for
spherical symmetry in loop quantum gravity | 35 pages; v2: journal version, minor clarifications | Class. Quantum Grav. 33 (2016) 155014 | 10.1088/0264-9381/33/15/155014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Building on a recent proposal for a quantum reduction to spherical symmetry
from full loop quantum gravity, we investigate the relation between a
quantisation of spherically symmetric general relativity and a reduction at the
quantum level. To this end, we generalise the previously proposed quantum
reduction by dropp... | [
{
"created": "Tue, 1 Dec 2015 10:58:08 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2016 14:24:10 GMT",
"version": "v2"
}
] | 2016-07-29 | [
[
"Bodendorfer",
"Norbert",
""
],
[
"Zipfel",
"Antonia",
""
]
] | Building on a recent proposal for a quantum reduction to spherical symmetry from full loop quantum gravity, we investigate the relation between a quantisation of spherically symmetric general relativity and a reduction at the quantum level. To this end, we generalise the previously proposed quantum reduction by droppin... |
2211.07418 | Hemily Gomes Marciano Fortes | Jos\'e Carlos Neves de Araujo, Hemily Gomes Marciano Fortes | Mass of compact stars in f(T) gravity | null | Eur. Phys. J. C 83, 376 (2023) | 10.1140/epjc/s10052-023-11525-8 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The mass of compact objects in General Relativity (GR), which as is well
known, is obtained via the Tolman - Oppenheimer - Volkov (TOV) equations, is a
well defined quantity. However, in alternative gravity, this is not in general
the case. In the particular case of $f(T)$ gravity, where $T$ is the scalar
torsion, so... | [
{
"created": "Mon, 14 Nov 2022 14:48:09 GMT",
"version": "v1"
},
{
"created": "Mon, 8 May 2023 14:15:45 GMT",
"version": "v2"
}
] | 2023-05-09 | [
[
"de Araujo",
"José Carlos Neves",
""
],
[
"Fortes",
"Hemily Gomes Marciano",
""
]
] | The mass of compact objects in General Relativity (GR), which as is well known, is obtained via the Tolman - Oppenheimer - Volkov (TOV) equations, is a well defined quantity. However, in alternative gravity, this is not in general the case. In the particular case of $f(T)$ gravity, where $T$ is the scalar torsion, some... |
2109.03270 | Christopher Kauffman | Christopher Kauffman and Hans Lindblad | Global stability of Minkowski space for the
Einstein-Maxwell-Klein-Gordon system in generalized wave coordinates | Version 2, 63 pages. Added exposition and corrected minor errors | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove global existence for Einstein's equations with a charged scalar
field for initial conditions sufficiently close to the Minkowski spacetime
without matter. The proof relies on generalized wave coordinates adapted to the
outgoing Schwarzschild light cones and the estimates for the massless
Maxwell-Klein-Gordon... | [
{
"created": "Tue, 7 Sep 2021 18:17:38 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Jan 2023 20:03:26 GMT",
"version": "v2"
}
] | 2023-01-18 | [
[
"Kauffman",
"Christopher",
""
],
[
"Lindblad",
"Hans",
""
]
] | We prove global existence for Einstein's equations with a charged scalar field for initial conditions sufficiently close to the Minkowski spacetime without matter. The proof relies on generalized wave coordinates adapted to the outgoing Schwarzschild light cones and the estimates for the massless Maxwell-Klein-Gordon s... |
1307.4406 | Shohreh Abdolrahimi | Shohreh Abdolrahimi and Andrey A. Shoom | Distorted Five-dimensional Electrically Charged Black Holes | 39 pages, 10 figures | Phys. Rev. D 89, 024040 (2014) | 10.1103/PhysRevD.89.024040 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive and study distorted, five-dimensional, electrically charged,
non-extremal black holes on the example of a static and "axisymmetric" black
hole distorted by external, electrically neutral matter.The solution satisfies
Einstein-Maxwell equations which admits an $\mathbb{R}^1\times U(1)\times U(1)$
isometry gr... | [
{
"created": "Tue, 16 Jul 2013 20:00:20 GMT",
"version": "v1"
}
] | 2014-02-05 | [
[
"Abdolrahimi",
"Shohreh",
""
],
[
"Shoom",
"Andrey A.",
""
]
] | We derive and study distorted, five-dimensional, electrically charged, non-extremal black holes on the example of a static and "axisymmetric" black hole distorted by external, electrically neutral matter.The solution satisfies Einstein-Maxwell equations which admits an $\mathbb{R}^1\times U(1)\times U(1)$ isometry grou... |
1112.3303 | Abel Camacho Mr. | J. I. Rivas, A. Camacho, and E. Goeklue | Bogoliubov space of a Bose--Einstein condensate and quantum spacetime
fluctuations | null | null | 10.1088/0264-9381/29/16/165005 | null | gr-qc cond-mat.quant-gas | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work we consider the role that metric fluctuations could have
upon the properties of a Bose--Einstein condensate. In particular we consider
the Bogoliubov space associated to it and show that there are, at least, two
independent ways in which the average size of these metric fluctuations could
be, expe... | [
{
"created": "Wed, 14 Dec 2011 18:56:51 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Rivas",
"J. I.",
""
],
[
"Camacho",
"A.",
""
],
[
"Goeklue",
"E.",
""
]
] | In the present work we consider the role that metric fluctuations could have upon the properties of a Bose--Einstein condensate. In particular we consider the Bogoliubov space associated to it and show that there are, at least, two independent ways in which the average size of these metric fluctuations could be, experi... |
1703.05649 | Jose Edgar Madriz Aguilar Dr. | Jose Edgar Madriz Aguilar, M. Montes | Interacting quintessence from new formalism of gravitoelectromagnetism
formulated on a geometrical scalar-tensor gauge theory of gravity | 6 pages, no-figures. Improved version. We have included a
quintessence model | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive an interacting quintessence model on the framework of a recently
introduced new class of geometrical scalar-tensor theories of gravity
formulated on a Weyl-Integrable geometry, where the gravitational sector is
described by both a scalar and a tensor metric field. By using a Palatini
variational principle w... | [
{
"created": "Thu, 16 Mar 2017 14:45:31 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Jul 2017 22:57:36 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Dec 2017 22:03:12 GMT",
"version": "v3"
}
] | 2017-12-19 | [
[
"Aguilar",
"Jose Edgar Madriz",
""
],
[
"Montes",
"M.",
""
]
] | We derive an interacting quintessence model on the framework of a recently introduced new class of geometrical scalar-tensor theories of gravity formulated on a Weyl-Integrable geometry, where the gravitational sector is described by both a scalar and a tensor metric field. By using a Palatini variational principle we ... |
gr-qc/9304034 | R. Beig, Univ. Wien. | R. Beig (Institut f\"ur Theoretische Physik Universit\"at Wien), N.
\'O Murchadha (Physics Department, University College Cork, Ireland) | Trapped Surfaces in Vacuum Spacetimes | 14 pages | Class.Quant.Grav.11:419-430,1994 | 10.1088/0264-9381/11/2/013 | UWThPh-1992-33 | gr-qc | null | An earlier construction by the authors of sequences of globally regular,
asymptotically flat initial data for the Einstein vacuum equations containing
trapped surfaces for large values of the parameter is extended, from the time
symmetric case considered previously, to the case of maximal slices. The
resulting theore... | [
{
"created": "Thu, 22 Apr 1993 09:24:00 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Beig",
"R.",
"",
"Institut für Theoretische Physik Universität Wien"
],
[
"Murchadha",
"N. Ó",
"",
"Physics Department, University College Cork, Ireland"
]
] | An earlier construction by the authors of sequences of globally regular, asymptotically flat initial data for the Einstein vacuum equations containing trapped surfaces for large values of the parameter is extended, from the time symmetric case considered previously, to the case of maximal slices. The resulting theorem ... |
1508.07872 | Jacek Jezierski | Hans-Peter Gittel, Jacek Jezierski, Jerzy Kijowski | On the existence of rigid spheres in four-dimensional spacetime
manifolds | 26 pages | Vietnam Journal of Mathematics, 44(1), (2016) 231-249 | 10.1007/s10013-016-0185-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper deals with the generalization of usual round spheres in the flat
Minkowski spacetime to the case of a generic four-dimensional spacetime
manifold $M$. We consider geometric properties of sphere-like submanifolds in
$M$ and introduce conditions on external curvature and torsion, which lead to a
definition o... | [
{
"created": "Mon, 31 Aug 2015 15:29:36 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Oct 2016 09:31:38 GMT",
"version": "v2"
}
] | 2016-10-26 | [
[
"Gittel",
"Hans-Peter",
""
],
[
"Jezierski",
"Jacek",
""
],
[
"Kijowski",
"Jerzy",
""
]
] | This paper deals with the generalization of usual round spheres in the flat Minkowski spacetime to the case of a generic four-dimensional spacetime manifold $M$. We consider geometric properties of sphere-like submanifolds in $M$ and introduce conditions on external curvature and torsion, which lead to a definition of ... |
2304.03160 | Gabriele Franciolini | G. Franciolini, F. Iacovelli, M. Mancarella, M. Maggiore, P. Pani, and
A. Riotto | Searching for Primordial Black Holes with the Einstein Telescope: impact
of design and systematics | 24 pages, 13 figures | null | 10.1103/PhysRevD.108.043506 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Primordial Black Holes (PBHs) have recently attracted much attention as they
may explain some of the LIGO/Virgo/KAGRA observations and significantly
contribute to the dark matter in our universe. The next generation of
Gravitational Wave (GW) detectors will have the unique opportunity to set
stringent bounds on this ... | [
{
"created": "Thu, 6 Apr 2023 15:43:47 GMT",
"version": "v1"
}
] | 2023-08-16 | [
[
"Franciolini",
"G.",
""
],
[
"Iacovelli",
"F.",
""
],
[
"Mancarella",
"M.",
""
],
[
"Maggiore",
"M.",
""
],
[
"Pani",
"P.",
""
],
[
"Riotto",
"A.",
""
]
] | Primordial Black Holes (PBHs) have recently attracted much attention as they may explain some of the LIGO/Virgo/KAGRA observations and significantly contribute to the dark matter in our universe. The next generation of Gravitational Wave (GW) detectors will have the unique opportunity to set stringent bounds on this pu... |
2206.08469 | Franciele Manoel Da Silva | F. M. da Silva, L. C. N. Santos, C. E. Mota, T. O. F. da Costa and J.
C. Fabris | Rapidly rotating neutron stars in $f(R,T)$ gravity | null | null | 10.1140/epjc/s10052-023-11466-2 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | In this work, we study the influence of $f(R,T)$ gravity on rapidly rotating
neutron stars. First we discuss the main aspects of this modified theory of
gravity where the gravitational Lagrangian is an arbitrary function of the
Ricci scalar $R$ and of the trace of the energy-momentum tensor $T$. Then we
present the b... | [
{
"created": "Thu, 16 Jun 2022 22:37:30 GMT",
"version": "v1"
}
] | 2023-05-03 | [
[
"da Silva",
"F. M.",
""
],
[
"Santos",
"L. C. N.",
""
],
[
"Mota",
"C. E.",
""
],
[
"da Costa",
"T. O. F.",
""
],
[
"Fabris",
"J. C.",
""
]
] | In this work, we study the influence of $f(R,T)$ gravity on rapidly rotating neutron stars. First we discuss the main aspects of this modified theory of gravity where the gravitational Lagrangian is an arbitrary function of the Ricci scalar $R$ and of the trace of the energy-momentum tensor $T$. Then we present the bas... |
0907.5403 | Claus Gerhardt | Claus Gerhardt | Quantum cosmological Friedman models with a Yang-Mills field and
positive energy levels | 9 pages, v3: minor corrections to bring it in line with the published
version | Class.Quant.Grav.27:035007,2010 | 10.1088/0264-9381/27/3/035007 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove the existence of a spectral resolution of the Wheeler-DeWitt
equation when the matter field is provided by a Yang-Mills field, with or
without mass term, if the spatial geometry of the underlying spacetime is
homothetic to $\R[3]$. The energy levels of the resulting quantum model, i.e.,
the eigenvalues of th... | [
{
"created": "Thu, 30 Jul 2009 19:40:58 GMT",
"version": "v1"
},
{
"created": "Sun, 2 Aug 2009 17:37:44 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Jan 2010 17:12:43 GMT",
"version": "v3"
}
] | 2010-04-30 | [
[
"Gerhardt",
"Claus",
""
]
] | We prove the existence of a spectral resolution of the Wheeler-DeWitt equation when the matter field is provided by a Yang-Mills field, with or without mass term, if the spatial geometry of the underlying spacetime is homothetic to $\R[3]$. The energy levels of the resulting quantum model, i.e., the eigenvalues of the ... |
1602.04067 | E. Kyriakopoulos | E. Kyriakopoulos | Rotating Anisotropic Fluid Solutions | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An exact rotating anisotropic fluid solution and a family of exact rotating
anisotropic fluid solutions are presented which satisfy all energy conditions
for certain values of their parameters. The components of the Ricci tensor the
eigenvalues of this tensor and the energy-momentum tensor of the solutions are
given ... | [
{
"created": "Fri, 12 Feb 2016 14:35:20 GMT",
"version": "v1"
}
] | 2016-02-15 | [
[
"Kyriakopoulos",
"E.",
""
]
] | An exact rotating anisotropic fluid solution and a family of exact rotating anisotropic fluid solutions are presented which satisfy all energy conditions for certain values of their parameters. The components of the Ricci tensor the eigenvalues of this tensor and the energy-momentum tensor of the solutions are given ex... |
0711.0669 | Deirdre Shoemaker | Tanja Bode, Deirdre Shoemaker, Frank Herrmann and Ian Hinder | Robustness of Binary Black Hole Mergers in the Presence of Spurious
Radiation | 12 pages, 12 figures | Phys.Rev.D77:044027,2008 | 10.1103/PhysRevD.77.044027 | null | gr-qc | null | We present an investigation into how sensitive the last orbits and merger of
binary black hole systems are to the presence of spurious radiation in the
initial data. Our numerical experiments consist of a binary black hole system
starting the last couple of orbits before merger with additional spurious
radiation cent... | [
{
"created": "Mon, 5 Nov 2007 20:41:21 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Feb 2008 20:46:15 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bode",
"Tanja",
""
],
[
"Shoemaker",
"Deirdre",
""
],
[
"Herrmann",
"Frank",
""
],
[
"Hinder",
"Ian",
""
]
] | We present an investigation into how sensitive the last orbits and merger of binary black hole systems are to the presence of spurious radiation in the initial data. Our numerical experiments consist of a binary black hole system starting the last couple of orbits before merger with additional spurious radiation center... |
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