id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1201.4321 | Reinhard Prix | Reinhard Prix, Miroslav Shaltev | Search for Continuous Gravitational Waves: Optimal StackSlide method at
fixed computing cost | 18 pages, 3 figures, RevTeX4. Final version, equivalent to that
published in PRD | PRD 85, 084010 (2012) | 10.1103/PhysRevD.85.084010 | LIGO-P1100156-v5 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Coherent wide parameter-space searches for continuous gravitational waves are
typically limited in sensitivity by their prohibitive computing cost. Therefore
semi-coherent methods (such as StackSlide) can often achieve a better
sensitivity. We develop an analytical method for finding optimal StackSlide
parameters at ... | [
{
"created": "Fri, 20 Jan 2012 15:35:45 GMT",
"version": "v1"
},
{
"created": "Thu, 3 May 2012 15:28:55 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Prix",
"Reinhard",
""
],
[
"Shaltev",
"Miroslav",
""
]
] | Coherent wide parameter-space searches for continuous gravitational waves are typically limited in sensitivity by their prohibitive computing cost. Therefore semi-coherent methods (such as StackSlide) can often achieve a better sensitivity. We develop an analytical method for finding optimal StackSlide parameters at fi... |
gr-qc/9706006 | Eanna Flanagan | Eanna E. Flanagan (Cornell) | Quantum inequalities in two dimensional Minkowski spacetime | 6 pages, no figures, uses revtex 3.1 macros, to appear in Phys Rev D.
Minor revisions and generalizations added 7/16/97 | Phys.Rev. D56 (1997) 4922-4926 | 10.1103/PhysRevD.56.4922 | null | gr-qc hep-th | null | We generalize some results of Ford and Roman constraining the possible
behaviors of renormalized expected stress-energy tensors of a free massless
scalar field in two dimensional Minkowski spacetime. Ford and Roman showed that
the energy density measured by an inertial observer, when averaged with respect
to that obs... | [
{
"created": "Mon, 2 Jun 1997 23:35:39 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Jul 1997 18:14:39 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Flanagan",
"Eanna E.",
"",
"Cornell"
]
] | We generalize some results of Ford and Roman constraining the possible behaviors of renormalized expected stress-energy tensors of a free massless scalar field in two dimensional Minkowski spacetime. Ford and Roman showed that the energy density measured by an inertial observer, when averaged with respect to that obser... |
gr-qc/9812009 | Ion Vancea | N. Pauna, I. V. Vancea | On Local Constraints of D=4 Supergravity in Terms of Dirac Eigenvalues | 7 pages, REVTeX file, to be published in Mod. Phys. Lett. A | Mod.Phys.Lett. A13 (1998) 3091-3098 | 10.1142/S0217732398003296 | null | gr-qc | null | It has been recently shown that in order to have Dirac eigenvalues as
observables of Euclidean supergravity, certain constraints should be imposed on
the covariant phase space as well as on Dirac eigenspinors. We investigate the
relationships among the constraints in the first set and argue that these
relationships a... | [
{
"created": "Wed, 2 Dec 1998 15:59:28 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Pauna",
"N.",
""
],
[
"Vancea",
"I. V.",
""
]
] | It has been recently shown that in order to have Dirac eigenvalues as observables of Euclidean supergravity, certain constraints should be imposed on the covariant phase space as well as on Dirac eigenspinors. We investigate the relationships among the constraints in the first set and argue that these relationships are... |
1107.3387 | Alexander Zhuk | Alexey Chopovsky, Maxim Eingorn and Alexander Zhuk | Weak-field limit of Kaluza-Klein models with spherical compactification:
problematic aspects | 15 pages, no figures, extended version | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate classical gravitational tests for the Kaluza-Klein model with
spherical compactification of the internal two-dimensional space. In the case
of the absence of a multidimensional bare cosmological constant, the only
matter which corresponds to the proposed metric ansatz is a perfect fluid with
the vacuum... | [
{
"created": "Mon, 18 Jul 2011 09:43:47 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Nov 2011 20:59:23 GMT",
"version": "v2"
},
{
"created": "Thu, 9 Feb 2012 17:00:17 GMT",
"version": "v3"
}
] | 2016-02-18 | [
[
"Chopovsky",
"Alexey",
""
],
[
"Eingorn",
"Maxim",
""
],
[
"Zhuk",
"Alexander",
""
]
] | We investigate classical gravitational tests for the Kaluza-Klein model with spherical compactification of the internal two-dimensional space. In the case of the absence of a multidimensional bare cosmological constant, the only matter which corresponds to the proposed metric ansatz is a perfect fluid with the vacuum e... |
2203.15341 | Basundhara Ghosh | Basundhara Ghosh, J\'er\'emie Francfort and Rajeev Kumar Jain | Invariance of cosmological number counts under disformal transformations | 16 pages, 1 table | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate whether true physical observables associated with the
measurements of large scale structure in the universe are frame-independent. In
particular, we study if cosmological observables such as the galaxy number
counts are invariant under the disformal transformations. In a previous work,
it was shown tha... | [
{
"created": "Tue, 29 Mar 2022 08:32:36 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Jul 2023 05:29:53 GMT",
"version": "v2"
}
] | 2023-08-01 | [
[
"Ghosh",
"Basundhara",
""
],
[
"Francfort",
"Jérémie",
""
],
[
"Jain",
"Rajeev Kumar",
""
]
] | We investigate whether true physical observables associated with the measurements of large scale structure in the universe are frame-independent. In particular, we study if cosmological observables such as the galaxy number counts are invariant under the disformal transformations. In a previous work, it was shown that ... |
1201.0525 | Louis Crane | Louis Crane | String Field Theory from Quantum Gravity | 15 pages, latex document proposal for unified field theory | null | 10.1142/S0129055X13430058 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent work on neutrino oscillations suggests that the three generations of
fermions in the standard model are related by representations of the finite
group A(4), the group of symmetries of the tetrahedron. Motivated by this, we
explore models which extend the EPRL model for quantum gravity by coupling it
to a boson... | [
{
"created": "Mon, 2 Jan 2012 19:50:06 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Crane",
"Louis",
""
]
] | Recent work on neutrino oscillations suggests that the three generations of fermions in the standard model are related by representations of the finite group A(4), the group of symmetries of the tetrahedron. Motivated by this, we explore models which extend the EPRL model for quantum gravity by coupling it to a bosonic... |
1806.02406 | Javier Olmedo | Abhay Ashtekar, Javier Olmedo and Parampreet Singh | Quantum Extension of the Kruskal Space-time | 47 pages, 5 figures, A short addendum is added after the last section
to address misleading remarks in a recent pre-print [50] that may confuse the
reader | Phys. Rev. D 98, 126003 (2018) | 10.1103/PhysRevD.98.126003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new description of macroscopic Kruskal black holes that incorporates the
quantum geometry corrections of loop quantum gravity is presented. It
encompasses both the `interior' region that contains classical singularities
and the `exterior' asymptotic region. Singularities are naturally resolved by
the quantum geomet... | [
{
"created": "Wed, 6 Jun 2018 19:57:27 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Nov 2018 20:35:50 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Feb 2019 18:52:53 GMT",
"version": "v3"
}
] | 2019-02-15 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Olmedo",
"Javier",
""
],
[
"Singh",
"Parampreet",
""
]
] | A new description of macroscopic Kruskal black holes that incorporates the quantum geometry corrections of loop quantum gravity is presented. It encompasses both the `interior' region that contains classical singularities and the `exterior' asymptotic region. Singularities are naturally resolved by the quantum geometry... |
1712.08399 | Jaume Haro | Jaume de Haro and Jaume Amor\'os | Bouncing cosmologies via modified gravity in the ADM formalism:
Application to Loop Quantum Cosmology | Version accepted for publication in PRD | Phys. Rev. D 97, 064014 (2018) | 10.1103/PhysRevD.97.064014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the ADM formalism as a tool to build bouncing cosmologies. In
this approach, the foliation of the spacetime has to be fixed in order to go
beyond General Relativity modifying the gravitational sector. Once a preferred
slicing, which we choose based on the matter content of the universe following
the spiri... | [
{
"created": "Fri, 22 Dec 2017 11:33:47 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Dec 2017 11:08:37 GMT",
"version": "v2"
},
{
"created": "Thu, 22 Feb 2018 13:20:58 GMT",
"version": "v3"
}
] | 2018-03-21 | [
[
"de Haro",
"Jaume",
""
],
[
"Amorós",
"Jaume",
""
]
] | We consider the ADM formalism as a tool to build bouncing cosmologies. In this approach, the foliation of the spacetime has to be fixed in order to go beyond General Relativity modifying the gravitational sector. Once a preferred slicing, which we choose based on the matter content of the universe following the spirit ... |
1111.6523 | Michael Jasiulek | Michael Jasiulek, Mikolaj Korzynski | Isometric embeddings of 2-spheres by embedding flow for applications in
numerical relativity | 18 pages, 14 figures | null | 10.1088/0264-9381/29/15/155010 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a numerical method for solving Weyl's embedding problem which
consists of finding a global isometric embedding of a positively curved and
positive-definite spherical 2-metric into the Euclidean three space. The method
is based on a construction introduced by Weingarten and was used in Nirenberg's
proof of ... | [
{
"created": "Mon, 28 Nov 2011 17:18:05 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Jasiulek",
"Michael",
""
],
[
"Korzynski",
"Mikolaj",
""
]
] | We present a numerical method for solving Weyl's embedding problem which consists of finding a global isometric embedding of a positively curved and positive-definite spherical 2-metric into the Euclidean three space. The method is based on a construction introduced by Weingarten and was used in Nirenberg's proof of We... |
1304.4780 | Hui Li | Hui Li and Yi Zhang | Thermodynamics of the apparent horizon in massive cosmology | 18 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Applying Clausius relation with energy-supply defined by the unified first
law of thermodynamics formalism to the apparent horizon of a massive
cosmological model proposed lately, the corrected entropic formula of the
apparent horizon is obtained with the help of the modified Friedmann equations.
This entropy-area re... | [
{
"created": "Wed, 17 Apr 2013 11:57:28 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Apr 2013 11:41:40 GMT",
"version": "v2"
}
] | 2013-04-19 | [
[
"Li",
"Hui",
""
],
[
"Zhang",
"Yi",
""
]
] | Applying Clausius relation with energy-supply defined by the unified first law of thermodynamics formalism to the apparent horizon of a massive cosmological model proposed lately, the corrected entropic formula of the apparent horizon is obtained with the help of the modified Friedmann equations. This entropy-area rela... |
gr-qc/0204025 | Oldrich Semerak | O. Semerak (Charles University Prague) | Towards gravitating discs around stationary black holes | 50 pages, to appear in: Gravitation: Following the Prague Inspiration
(To celebrate the 60th birthday of Jiri Bicak), eds. O. Semerak, J. Podolsky
and M. Zofka (World Scientific, Singapore 2002), p. 111 | null | 10.1142/9789812776938_0004 | null | gr-qc | null | This article outlines the search for an exact general relativistic
description of the exterior (vacuum) gravitational field of a rotating
spheroidal black hole surrounded by a realistic axially symmetric disc of
matter. The problem of multi-body stationary spacetimes is first exposed from
the perspective of the relat... | [
{
"created": "Fri, 5 Apr 2002 12:25:42 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Semerak",
"O.",
"",
"Charles University Prague"
]
] | This article outlines the search for an exact general relativistic description of the exterior (vacuum) gravitational field of a rotating spheroidal black hole surrounded by a realistic axially symmetric disc of matter. The problem of multi-body stationary spacetimes is first exposed from the perspective of the relativ... |
1104.4790 | Jose' P. S. Lemos | Jos\'e P. S. Lemos, Vilson T. Zanchin | Regular black holes: Electrically charged solutions,
Reissner-Nordstr\"om outside a de Sitter core | 10 pages, 3 figures | Phys.Rev.D83:124005,2011 | 10.1103/PhysRevD.83.124005 | null | gr-qc astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To have the correct picture of a black hole as a whole it is of crucial
importance to understand its interior. The singularities that lurk inside the
horizon of the usual Kerr-Newman family of black hole solutions signal an
endpoint to the physical laws and as such should be substituted in one way or
another. A propo... | [
{
"created": "Mon, 25 Apr 2011 20:00:09 GMT",
"version": "v1"
}
] | 2011-06-13 | [
[
"Lemos",
"José P. S.",
""
],
[
"Zanchin",
"Vilson T.",
""
]
] | To have the correct picture of a black hole as a whole it is of crucial importance to understand its interior. The singularities that lurk inside the horizon of the usual Kerr-Newman family of black hole solutions signal an endpoint to the physical laws and as such should be substituted in one way or another. A proposa... |
1201.1797 | Mihalis Dafermos | Mihalis Dafermos | Black holes without spacelike singularities | 30 pages, 9 figures, v2 discussion of the cosmological case expanded,
minor corrections, references updated | Comm. Math. Phys. 332 (2004), 729--757 | 10.1007/s00220-014-2063-4 | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that for small, spherically symmetric perturbations of
asymptotically flat two-ended Reissner-Nordstr\"om data for the
Einstein-Maxwell-real scalar field system, the boundary of the dynamic
spacetime which evolves is globally represented by a bifurcate null
hypersurface across which the metric extends con... | [
{
"created": "Mon, 9 Jan 2012 15:21:42 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Aug 2013 08:58:00 GMT",
"version": "v2"
}
] | 2014-12-30 | [
[
"Dafermos",
"Mihalis",
""
]
] | It is shown that for small, spherically symmetric perturbations of asymptotically flat two-ended Reissner-Nordstr\"om data for the Einstein-Maxwell-real scalar field system, the boundary of the dynamic spacetime which evolves is globally represented by a bifurcate null hypersurface across which the metric extends conti... |
gr-qc/9708063 | Ronggen Cai | Rong-Gen Cai, Jeong-Young Ji and Kwang-Sup Soh (SNU) | Topological dilaton black holes | 8 pages, Revtex, no figures | Phys.Rev.D57:6547-6550,1998 | 10.1103/PhysRevD.57.6547 | SNUTP 97-121 | gr-qc | null | In four-dimensional spacetime, when the two-sphere of black hole event
horizons is replaced by a two-dimensional hypersurface with zero or negative
constant curvature, the black hole is referred to as a topological black hole.
In this paper we present some exact topological black hole solutions in the
Einstein-Maxwel... | [
{
"created": "Tue, 26 Aug 1997 10:38:37 GMT",
"version": "v1"
},
{
"created": "Sun, 24 May 1998 12:37:23 GMT",
"version": "v2"
}
] | 2011-05-05 | [
[
"Cai",
"Rong-Gen",
"",
"SNU"
],
[
"Ji",
"Jeong-Young",
"",
"SNU"
],
[
"Soh",
"Kwang-Sup",
"",
"SNU"
]
] | In four-dimensional spacetime, when the two-sphere of black hole event horizons is replaced by a two-dimensional hypersurface with zero or negative constant curvature, the black hole is referred to as a topological black hole. In this paper we present some exact topological black hole solutions in the Einstein-Maxwell-... |
gr-qc/9408025 | null | E. Bruning, D. Coule and C. Xu | Inflationary cosmology with a non-analytic Lagrangian | 12 pages Latex. to be published in GRG | Gen.Rel.Grav. 26 (1994) 1197-1211 | 10.1007/BF02106712 | null | gr-qc | null | We consider an alternative higher order gravity theory which is non-analytic
in the Ricci curvature. It has power-law inflationary behaviour. This is
further evidence that inflation is a general property of higher derivative
gravity theories.
| [
{
"created": "Fri, 19 Aug 1994 15:58:23 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Bruning",
"E.",
""
],
[
"Coule",
"D.",
""
],
[
"Xu",
"C.",
""
]
] | We consider an alternative higher order gravity theory which is non-analytic in the Ricci curvature. It has power-law inflationary behaviour. This is further evidence that inflation is a general property of higher derivative gravity theories. |
2306.00992 | Alexandre Deur | A. Deur | Comment on "Does gravitational confinement sustain flat galactic
rotation curves without dark matter?'' | 5 Pages | null | null | null | gr-qc astro-ph.CO astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | We comment on the methods and the conclusion of Ref. [1], "Does gravitational
confinement sustain flat galactic rotation curves without dark matter?" The
article employs two methods to investigate whether non-perturbative corrections
from General Relativity are important for galactic rotation curves, and
concludes th... | [
{
"created": "Sat, 13 May 2023 15:11:29 GMT",
"version": "v1"
}
] | 2023-06-05 | [
[
"Deur",
"A.",
""
]
] | We comment on the methods and the conclusion of Ref. [1], "Does gravitational confinement sustain flat galactic rotation curves without dark matter?" The article employs two methods to investigate whether non-perturbative corrections from General Relativity are important for galactic rotation curves, and concludes that... |
0905.3914 | Pablo Laguna | James Healy, Pablo Laguna, Richard A. Matzner, Deirdre M. Shoemaker | Final Mass and Spin of Merged Black Holes and the Golden Black Hole | Version accepted for publication in Phys. Rev. D Rapid Comm. | Phys.Rev.D81:081501,2010 | 10.1103/PhysRevD.81.081501 | null | gr-qc astro-ph.SR hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present results on the mass and spin of the final black hole from mergers
of equal mass, spinning black holes. The study extends over a broad range of
initial orbital configurations, from direct plunges to quasi-circular inspirals
to more energetic orbits (generalizations of Newtonian elliptical orbits). It
provid... | [
{
"created": "Sun, 24 May 2009 19:23:07 GMT",
"version": "v1"
},
{
"created": "Thu, 28 May 2009 19:07:00 GMT",
"version": "v2"
},
{
"created": "Fri, 12 Mar 2010 15:52:06 GMT",
"version": "v3"
}
] | 2015-03-13 | [
[
"Healy",
"James",
""
],
[
"Laguna",
"Pablo",
""
],
[
"Matzner",
"Richard A.",
""
],
[
"Shoemaker",
"Deirdre M.",
""
]
] | We present results on the mass and spin of the final black hole from mergers of equal mass, spinning black holes. The study extends over a broad range of initial orbital configurations, from direct plunges to quasi-circular inspirals to more energetic orbits (generalizations of Newtonian elliptical orbits). It provides... |
gr-qc/0108049 | Juan A. Valiente-Kroon | Juan A. Valiente-Kroon | Can one detect a non-smooth null infinity? | 6 pages, to appear in Class. Quantum Grav | Class.Quant.Grav. 18 (2001) 4311-4316 | 10.1088/0264-9381/18/20/310 | null | gr-qc | null | It is shown that the precession of a gyroscope can be used to elucidate the
nature of the smoothness of the null infinity of an asymptotically flat
spacetime (describing an isolated body). A model for which the effects of
precession in the non-smooth null infinity case are of order $r^{-2}\ln r$ is
proposed. By contr... | [
{
"created": "Mon, 20 Aug 2001 07:20:04 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Valiente-Kroon",
"Juan A.",
""
]
] | It is shown that the precession of a gyroscope can be used to elucidate the nature of the smoothness of the null infinity of an asymptotically flat spacetime (describing an isolated body). A model for which the effects of precession in the non-smooth null infinity case are of order $r^{-2}\ln r$ is proposed. By contras... |
2407.04146 | Pedro Meert | R. Casadio, R. da Rocha, A. Giusti, P. Meert | Quantum dust core of black holes with central charge | 13 pages, 6 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a dust ball with an electrically charged central core and study
its quantum spectrum by quantising the geodesic equation for individual dust
particles in the corresponding Reissner-Nordstr\"om spacetime. As in the
neutral case investigated previously, we find a ground state of the dust ball
with the size ... | [
{
"created": "Thu, 4 Jul 2024 20:30:36 GMT",
"version": "v1"
}
] | 2024-07-08 | [
[
"Casadio",
"R.",
""
],
[
"da Rocha",
"R.",
""
],
[
"Giusti",
"A.",
""
],
[
"Meert",
"P.",
""
]
] | We consider a dust ball with an electrically charged central core and study its quantum spectrum by quantising the geodesic equation for individual dust particles in the corresponding Reissner-Nordstr\"om spacetime. As in the neutral case investigated previously, we find a ground state of the dust ball with the size of... |
gr-qc/0309099 | Gil de Oliveira-Neto | G. Oliveira-Neto and F. I. Takakura | Wyman's solution, self-similarity and critical behaviour | Revtex version, 15pages, 6 figures | J.Math.Phys. 46 (2005) 062503 | 10.1063/1.1920308 | null | gr-qc | null | We show that the Wyman's solution may be obtained from the four-dimensional
Einstein's equations for a spherically symmetric, minimally coupled, massless
scalar field by using the continuous self-similarity of those equations. The
Wyman's solution depends on two parameters, the mass $M$ and the scalar charge
$\Sigma$... | [
{
"created": "Fri, 19 Sep 2003 14:48:59 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Oliveira-Neto",
"G.",
""
],
[
"Takakura",
"F. I.",
""
]
] | We show that the Wyman's solution may be obtained from the four-dimensional Einstein's equations for a spherically symmetric, minimally coupled, massless scalar field by using the continuous self-similarity of those equations. The Wyman's solution depends on two parameters, the mass $M$ and the scalar charge $\Sigma$. ... |
0909.2427 | Kayoomars Karami | K. Karami, A. Abdolmaleki | The generalized second law for the interacting new agegraphic dark
energy in a non-flat FRW universe enclosed by the apparent horizon | 9 pages, accepted for publication in Int. J. Theor. Phys | Int. J. Theor. Phys. 50 (2011) 1656 | 10.1007/s10773-011-0674-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the validity of the generalized second law of gravitational
thermodynamics in a non-flat FRW universe containing the interacting new
agegraphic dark energy with cold dark matter. The boundary of the universe is
assumed to be enclosed by the dynamical apparent horizon. We show that for this
model, the e... | [
{
"created": "Mon, 14 Sep 2009 16:19:13 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Nov 2009 17:44:02 GMT",
"version": "v2"
},
{
"created": "Mon, 31 Jan 2011 10:25:06 GMT",
"version": "v3"
}
] | 2011-04-20 | [
[
"Karami",
"K.",
""
],
[
"Abdolmaleki",
"A.",
""
]
] | We investigate the validity of the generalized second law of gravitational thermodynamics in a non-flat FRW universe containing the interacting new agegraphic dark energy with cold dark matter. The boundary of the universe is assumed to be enclosed by the dynamical apparent horizon. We show that for this model, the equ... |
gr-qc/9812005 | Toporenskij A. V. | A.V.Toporensky | Chaos in closed isotropic cosmological models with steep scalar field
potential | 20 pages with 3 eps figures. Minor changes, final version to appear
in Int. J. Mod. Phys. D | Turk.J.Phys. 24 (2000) 453-462; Int.J.Mod.Phys. D8 (1999) 739-750 | null | null | gr-qc chao-dyn nlin.CD | null | The dynamics of closed scalar field FRW cosmological models is studied for
several types of exponentially and more than exponentially steep potentials.
The parameters of scalar field potentials which allow a chaotic behaviour are
found from numerical investigations. It is argued that analytical studies of
equation of... | [
{
"created": "Tue, 1 Dec 1998 16:23:59 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Sep 1999 15:09:57 GMT",
"version": "v2"
},
{
"created": "Wed, 29 Dec 1999 13:59:01 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Toporensky",
"A. V.",
""
]
] | The dynamics of closed scalar field FRW cosmological models is studied for several types of exponentially and more than exponentially steep potentials. The parameters of scalar field potentials which allow a chaotic behaviour are found from numerical investigations. It is argued that analytical studies of equation of m... |
2001.08411 | P. B. Covas | P. B. Covas, Alicia M. Sintes | First all-sky search for continuous gravitational-wave signals from
unknown neutron stars in binary systems using Advanced LIGO data | null | Phys. Rev. Lett. 124, 191102 (2020) | 10.1103/PhysRevLett.124.191102 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Rotating neutron stars can emit continuous gravitational waves, which have
not yet been detected. We present a search for continuous gravitational waves
from unknown neutron stars in binary systems with orbital period between 15 and
45 days. This is the first time that Advanced LIGO data and the recently
developed Bi... | [
{
"created": "Thu, 23 Jan 2020 08:57:49 GMT",
"version": "v1"
}
] | 2020-05-20 | [
[
"Covas",
"P. B.",
""
],
[
"Sintes",
"Alicia M.",
""
]
] | Rotating neutron stars can emit continuous gravitational waves, which have not yet been detected. We present a search for continuous gravitational waves from unknown neutron stars in binary systems with orbital period between 15 and 45 days. This is the first time that Advanced LIGO data and the recently developed Bina... |
1105.4863 | Lorenzo Iorio | Lorenzo Iorio | On the anomalous increase of the lunar eccentricity | LaTex2e, 4 pages, no figures, no tables, 17 references. Submitted to
the Proceedings of the 46th Rencontres de Moriond. Gravitational Waves and
Experimental Gravity. 20-27 March 2011, La Thuile, Val d'Aosta, Italy | 2011 Gravitational Waves and Experimental Gravity, The Gioi
Publishers, Vietnam, pp., 255-258, 2011 | null | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Possible explanations of the recently reported anomalous increase of the
eccentricity of the lunar orbit are sought in terms of classical Newtonian
mechanics, general relativity, and long-range modifications of gravity.
| [
{
"created": "Tue, 24 May 2011 19:33:14 GMT",
"version": "v1"
}
] | 2012-05-28 | [
[
"Iorio",
"Lorenzo",
""
]
] | Possible explanations of the recently reported anomalous increase of the eccentricity of the lunar orbit are sought in terms of classical Newtonian mechanics, general relativity, and long-range modifications of gravity. |
0710.5310 | Pawel Nurowski | Pawel Nurowski | Twisting type N vacuums with cosmological constant | null | J.Geom.Phys.58:615-618,2008 | 10.1016/j.geomphys.2007.12.010 | null | gr-qc | null | We provide the first examples of vacuum metrics with cosmological constant
which have a twisting quadruple principal null direction.
| [
{
"created": "Sun, 28 Oct 2007 20:07:45 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Nurowski",
"Pawel",
""
]
] | We provide the first examples of vacuum metrics with cosmological constant which have a twisting quadruple principal null direction. |
2207.13074 | Justin Ripley | Justin L. Ripley | Numerical relativity for Horndeski gravity | 58 pages, 2 figures, revised for publication in IJMPD | IJMPD 31(13):2230017, 2022 | 10.1142/S0218271822300178 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an overview of recent developments in the numerical solution of
Horndeski gravity theories, which are the class of all scalar-tensor theories
of gravity that have second order equations of motion. We review several
methods that have been used to establish well-posed initial value problems for
these theorie... | [
{
"created": "Tue, 26 Jul 2022 17:45:15 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Sep 2022 16:08:50 GMT",
"version": "v2"
}
] | 2022-11-18 | [
[
"Ripley",
"Justin L.",
""
]
] | We present an overview of recent developments in the numerical solution of Horndeski gravity theories, which are the class of all scalar-tensor theories of gravity that have second order equations of motion. We review several methods that have been used to establish well-posed initial value problems for these theories,... |
gr-qc/0312094 | Viqar Husain | V. Husain and O. Winkler | On Singularity Resolution in Quantum Gravity | 12 pages | Phys.Rev. D69 (2004) 084016 | 10.1103/PhysRevD.69.084016 | null | gr-qc hep-th | null | We examine the singularity resolution issue in quantum gravity by studying a
new quantization of standard Friedmann-Robertson-Walker geometrodynamics. The
quantization procedure is inspired by the loop quantum gravity programme, and
is based on an alternative to the Schr\"odinger representation normally used in
metri... | [
{
"created": "Sat, 20 Dec 2003 16:26:02 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Husain",
"V.",
""
],
[
"Winkler",
"O.",
""
]
] | We examine the singularity resolution issue in quantum gravity by studying a new quantization of standard Friedmann-Robertson-Walker geometrodynamics. The quantization procedure is inspired by the loop quantum gravity programme, and is based on an alternative to the Schr\"odinger representation normally used in metric ... |
1801.03587 | Emanuele Berti | Emanuele Berti, Kent Yagi, Huan Yang, Nicol\'as Yunes | Extreme Gravity Tests with Gravitational Waves from Compact Binary
Coalescences: (II) Ringdown | 40 pages, 10 figures, 1 table. Matches version published in the
General Relativity and Gravitation (GRG) Topical Collection "Testing the Kerr
spacetime with gravitational-wave and electromagnetic observations" (Guest
Editor: Emanuele Berti) | null | 10.1007/s10714-018-2372-6 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The LIGO/Virgo detections of binary black hole mergers marked a watershed
moment in astronomy, ushering in the era of precision tests of Kerr dynamics.
We review theoretical and experimental challenges that must be overcome to
carry out black hole spectroscopy with present and future gravitational wave
detectors. Amo... | [
{
"created": "Wed, 10 Jan 2018 23:44:26 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Apr 2018 23:05:00 GMT",
"version": "v2"
}
] | 2018-04-12 | [
[
"Berti",
"Emanuele",
""
],
[
"Yagi",
"Kent",
""
],
[
"Yang",
"Huan",
""
],
[
"Yunes",
"Nicolás",
""
]
] | The LIGO/Virgo detections of binary black hole mergers marked a watershed moment in astronomy, ushering in the era of precision tests of Kerr dynamics. We review theoretical and experimental challenges that must be overcome to carry out black hole spectroscopy with present and future gravitational wave detectors. Among... |
0801.4766 | Lode Wylleman | Lode Wylleman | A Petrov type I and generically asymmetric rotating dust family | 7 pages, irrotational limit case added, several minor errors
corrected | Class.Quant.Grav.25:172001,2008 | 10.1088/0264-9381/25/17/172001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The general line element corresponding to the family of algebraically
general, gravito-electric, expanding, rotating dust models with one
functionally independent zero-order Riemann invariant is constructed. The
isometry group is at most one-dimensional but generically trivial. It is shown
that the asymmetric solutio... | [
{
"created": "Wed, 30 Jan 2008 21:13:40 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Jun 2008 21:11:50 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Wylleman",
"Lode",
""
]
] | The general line element corresponding to the family of algebraically general, gravito-electric, expanding, rotating dust models with one functionally independent zero-order Riemann invariant is constructed. The isometry group is at most one-dimensional but generically trivial. It is shown that the asymmetric solutions... |
0710.5046 | Philip Fellman | Philip V. Fellman, Jonathan Vos Post, Christine M. Carmichael, Andrew
Carmichael Post | Comparative Quantum Cosmology: Causality, Singularity, and Boundary
Conditions | 17 pages, 2 figures. 7th International Conference on Complex Systems | null | null | null | gr-qc | null | In this review article we compare the recent work of Peter Lynds, "On a
finite universe with no beginning or end", with that of Stephen Hawking,
primarily "Quantum Cosmology, M-Theory, and the Anthropic Principle", and two
foundational works by Sean M. Carroll and Jennifer Chen, "Does Inflation
Provide Natural Condit... | [
{
"created": "Fri, 26 Oct 2007 10:03:10 GMT",
"version": "v1"
}
] | 2007-10-29 | [
[
"Fellman",
"Philip V.",
""
],
[
"Post",
"Jonathan Vos",
""
],
[
"Carmichael",
"Christine M.",
""
],
[
"Post",
"Andrew Carmichael",
""
]
] | In this review article we compare the recent work of Peter Lynds, "On a finite universe with no beginning or end", with that of Stephen Hawking, primarily "Quantum Cosmology, M-Theory, and the Anthropic Principle", and two foundational works by Sean M. Carroll and Jennifer Chen, "Does Inflation Provide Natural Conditio... |
gr-qc/9502020 | Carlos Kozameh | Savitri V. Iyer, Carlos N. Kozameh, Ezra T. Newman | The Vacuum Einstein Equations via Holonomy around Closed Loops on
Characteristic Surfaces | 28 pages, RevTeX, 3 PostScript figures | null | 10.1016/0393-0440(95)00031-3 | null | gr-qc | null | We reformulate the standard local equations of general relativity for
asymptotically flat spacetimes in terms of two non-local quantities, the
holonomy $H$ around certain closed null loops on characteristic surfaces and
the light cone cut function $Z$, which describes the intersection of the future
null cones from ar... | [
{
"created": "Wed, 8 Feb 1995 07:20:41 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Feb 1995 05:28:43 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Iyer",
"Savitri V.",
""
],
[
"Kozameh",
"Carlos N.",
""
],
[
"Newman",
"Ezra T.",
""
]
] | We reformulate the standard local equations of general relativity for asymptotically flat spacetimes in terms of two non-local quantities, the holonomy $H$ around certain closed null loops on characteristic surfaces and the light cone cut function $Z$, which describes the intersection of the future null cones from arbi... |
1107.2610 | H. Kleinert | Hagen Kleinert | The Purely Geometric Part of "Dark Matter" -- A Fresh Playground for
"String Theory" | 4 pages | EJTP 8, 27 (2012) | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that part of "dark matter" is not made of matter, but of the
singular world-surfaces in the solutions of Einstein's vacuum field equation
G_{\mu\nu}=0. Their Einstein-Hilbert action governs also their quantum
fluctuation. It coincides with the action of closed bosonic "strings" in four
spacetime dimensions, ... | [
{
"created": "Wed, 13 Jul 2011 17:34:07 GMT",
"version": "v1"
}
] | 2012-02-14 | [
[
"Kleinert",
"Hagen",
""
]
] | We argue that part of "dark matter" is not made of matter, but of the singular world-surfaces in the solutions of Einstein's vacuum field equation G_{\mu\nu}=0. Their Einstein-Hilbert action governs also their quantum fluctuation. It coincides with the action of closed bosonic "strings" in four spacetime dimensions, wh... |
1006.1624 | Qin Sheng | M. R. Martins, M. F. A. da Silva and Andrew D. Sheng | Gravitational Collapse of Phantom Fluid in (2+1)-Dimensions | 10 pages | Gen.Rel.Grav.42:281-292,2010 | 10.1007/s10714-009-0838-2 | Y-2009-08-01 | gr-qc astro-ph.CO math-ph math.MP math.NA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This investigation is devoted to the solutions of Einstein's field equations
for a circularly symmetric anisotropic fluid, with kinematic self-similarity of
the first kind, in $(2+1)$-dimensional spacetimes. In the case where the radial
pressure vanishes, we show that there exists a solution of the equations that
rep... | [
{
"created": "Tue, 8 Jun 2010 17:53:26 GMT",
"version": "v1"
}
] | 2010-11-04 | [
[
"Martins",
"M. R.",
""
],
[
"da Silva",
"M. F. A.",
""
],
[
"Sheng",
"Andrew D.",
""
]
] | This investigation is devoted to the solutions of Einstein's field equations for a circularly symmetric anisotropic fluid, with kinematic self-similarity of the first kind, in $(2+1)$-dimensional spacetimes. In the case where the radial pressure vanishes, we show that there exists a solution of the equations that repre... |
gr-qc/9803085 | Masaru Shibata | Masaru Shibata | A relativistic formalism for computation of irrotational binary stars in
quasi equilibrium states | 5 pages, corrected eqs.(2.10), (2.11) and (3.1) | Phys.Rev. D58 (1998) 024012 | 10.1103/PhysRevD.58.024012 | OU-TAP 73 | gr-qc | null | We present relativistic hydrostatic equations for obtaining irrotational
binary neutron stars in quasi equilibrium states in 3+1 formalism. Equations
derived here are different from those previously given by Bonazzola,
Gourgoulhon, and Marck, and have a simpler and more tractable form for
computation in numerical rel... | [
{
"created": "Thu, 26 Mar 1998 10:26:27 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Apr 1998 02:31:41 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Apr 1998 07:02:43 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Shibata",
"Masaru",
""
]
] | We present relativistic hydrostatic equations for obtaining irrotational binary neutron stars in quasi equilibrium states in 3+1 formalism. Equations derived here are different from those previously given by Bonazzola, Gourgoulhon, and Marck, and have a simpler and more tractable form for computation in numerical relat... |
1111.4837 | Ovidiu Cristinel Stoica | Ovidiu-Cristinel Stoica | Schwarzschild Singularity is Semi-Regularizable | 11 pages, 3 figures | Eur. Phys. J. Plus (2012) 127: 83 | 10.1140/epjp/i2012-12083-1 | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the Schwarzschild spacetime can be extended so that the
metric becomes analytic at the singularity. The singularity continues to exist,
but it is made degenerate and smooth, and the infinities are removed by an
appropriate choice of coordinates. A family of analytic extensions is found,
and one of th... | [
{
"created": "Mon, 21 Nov 2011 11:38:49 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Feb 2012 13:53:53 GMT",
"version": "v2"
}
] | 2012-07-25 | [
[
"Stoica",
"Ovidiu-Cristinel",
""
]
] | It is shown that the Schwarzschild spacetime can be extended so that the metric becomes analytic at the singularity. The singularity continues to exist, but it is made degenerate and smooth, and the infinities are removed by an appropriate choice of coordinates. A family of analytic extensions is found, and one of thes... |
0801.1711 | Robert Bluhm | Robert Bluhm | Nambu-Goldstone and Massive Modes in Gravitational Theories with
Spontaneous Lorentz Breaking | Talk presented at the Fourth Meeting on CPT and Lorentz Symmetry,
Bloomington, IN, August, 2007; 7 pages. Typos corrected | null | 10.1142/9789812779519_0020 | null | gr-qc | null | Spontaneous breaking of local Lorentz symmetry is of interest as a possible
mechanism originating from physics at the Planck scale. If such breaking
occurs, however, it raises the questions of what the fate of the
Nambu-Goldstone modes is, whether a Higgs mechanism can occur, and whether
additional massive modes (ana... | [
{
"created": "Fri, 11 Jan 2008 02:40:18 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Apr 2008 18:05:20 GMT",
"version": "v2"
}
] | 2016-11-09 | [
[
"Bluhm",
"Robert",
""
]
] | Spontaneous breaking of local Lorentz symmetry is of interest as a possible mechanism originating from physics at the Planck scale. If such breaking occurs, however, it raises the questions of what the fate of the Nambu-Goldstone modes is, whether a Higgs mechanism can occur, and whether additional massive modes (analo... |
gr-qc/0203074 | Antonio J. Segui | L.J. Boya, M.A. Per, A.J. Segui | Graphical and Kinematical Approach to Cosmological Horizons | Latex2e, 27 pages, 4 figures, submitted to Class. Quantum Grav | Phys.Rev. D66 (2002) 064009 | 10.1103/PhysRevD.66.064009 | DFTUZ/02/02 | gr-qc astro-ph hep-th | null | We study the apparition of event horizons in accelerated expanding
cosmologies. We give a graphical and analytical representation of the horizons
using proper distances to coordinate the events. Our analysis is mainly
kinematical. We show that, independently of the dynamical equations, all the
event horizons tend in ... | [
{
"created": "Fri, 22 Mar 2002 18:31:02 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Boya",
"L. J.",
""
],
[
"Per",
"M. A.",
""
],
[
"Segui",
"A. J.",
""
]
] | We study the apparition of event horizons in accelerated expanding cosmologies. We give a graphical and analytical representation of the horizons using proper distances to coordinate the events. Our analysis is mainly kinematical. We show that, independently of the dynamical equations, all the event horizons tend in th... |
1906.01970 | Ritabrata Biswas | Amritendu Haldar and Ritabrata Biswas | Geometrothermodynamic Analysis and $P$-$V$ criticality of Higher
Dimensional Charged Gauss-Bonnet Black Holes With First Order Entropy
Correction | arXiv admin note: text overlap with arXiv:1903.07455 | General Relativity and Gravitation 51(2019) 35 | 10.1007/s10714-019-2520-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a charged Gauss-Bonnet black hole in $d$-dimensional spacetime
and examine the effect of thermal fluctuations on the thermodynamics of the
concerned black hole. At first we take the first order logarithmic correction
term in entropy and compute the thermodynamic potentials like Helmholtz free
energy $F$, ... | [
{
"created": "Thu, 30 May 2019 05:50:13 GMT",
"version": "v1"
}
] | 2019-06-06 | [
[
"Haldar",
"Amritendu",
""
],
[
"Biswas",
"Ritabrata",
""
]
] | We consider a charged Gauss-Bonnet black hole in $d$-dimensional spacetime and examine the effect of thermal fluctuations on the thermodynamics of the concerned black hole. At first we take the first order logarithmic correction term in entropy and compute the thermodynamic potentials like Helmholtz free energy $F$, en... |
2204.01255 | Masahiko Taniguchi | Tomohiro Inagaki, Masahiko Taniguchi | Cartan $F(R)$ Gravity and Equivalent Scalar-Tensor Theory | 8 pages | Symmetry 2022, 14(9), 1830 | 10.3390/sym14091830 | HUPD2205 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the Cartan formalism in $F(R)$ gravity. $F(R)$ gravity has
been introduced as a theory to explain cosmological accelerated expansion by
replacing the Ricci scalar $R$ in the Einstein-Hilbert action with a function
of $R$. As is well-known, $F(R)$ gravity is rewritten as a scalar-tensor theory
by using ... | [
{
"created": "Mon, 4 Apr 2022 05:53:46 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Sep 2022 00:38:05 GMT",
"version": "v2"
}
] | 2022-10-13 | [
[
"Inagaki",
"Tomohiro",
""
],
[
"Taniguchi",
"Masahiko",
""
]
] | We investigate the Cartan formalism in $F(R)$ gravity. $F(R)$ gravity has been introduced as a theory to explain cosmological accelerated expansion by replacing the Ricci scalar $R$ in the Einstein-Hilbert action with a function of $R$. As is well-known, $F(R)$ gravity is rewritten as a scalar-tensor theory by using th... |
gr-qc/0102025 | Gerard Clement | Gerard Clement and Dmitri Gal'tsov | Bertotti-Robinson type solutions to Dilaton-Axion Gravity | 21 pages | Phys.Rev. D63 (2001) 124011 | 10.1103/PhysRevD.63.124011 | LAPTH-833/01, DTP-MSU/01-03 | gr-qc hep-th | null | We present a new solution to dilaton-axion gravity which looks like a
rotating Bertotti-Robinson (BR) Universe. It is supported by an homogeneous
Maxwell field and a linear axion and can be obtained as a near-horizon limit of
extremal rotating dilaton-axion black holes. It has the isometry $SL(2,R)\times
U(1)$ where ... | [
{
"created": "Tue, 6 Feb 2001 15:31:09 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Clement",
"Gerard",
""
],
[
"Gal'tsov",
"Dmitri",
""
]
] | We present a new solution to dilaton-axion gravity which looks like a rotating Bertotti-Robinson (BR) Universe. It is supported by an homogeneous Maxwell field and a linear axion and can be obtained as a near-horizon limit of extremal rotating dilaton-axion black holes. It has the isometry $SL(2,R)\times U(1)$ where U(... |
gr-qc/0205134 | Noah Graham | Ken D. Olum and Noah Graham | Static Negative Energies Near a Domain Wall | 6 pages, 1 figure, uses RevTeX4; v2: added acknowledgements; v3:
minor correction and clarifications | Phys.Lett. B554 (2003) 175-179 | 10.1016/S0370-2693(03)00011-X | UCLA/02/TEP/10 | gr-qc hep-th | null | We show that a system of a domain wall coupled to a scalar field has static
negative energy density at certain distances from the domain wall. This system
provides a simple, explicit example of violation of the averaged weak energy
condition and the quantum inequalities by interacting quantum fields. Unlike
idealized... | [
{
"created": "Fri, 31 May 2002 01:18:02 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Jun 2002 20:53:55 GMT",
"version": "v2"
},
{
"created": "Sat, 7 Dec 2002 17:25:31 GMT",
"version": "v3"
}
] | 2010-04-05 | [
[
"Olum",
"Ken D.",
""
],
[
"Graham",
"Noah",
""
]
] | We show that a system of a domain wall coupled to a scalar field has static negative energy density at certain distances from the domain wall. This system provides a simple, explicit example of violation of the averaged weak energy condition and the quantum inequalities by interacting quantum fields. Unlike idealized s... |
2306.12490 | Fabrizio Corelli | Enrico Cannizzaro, Fabrizio Corelli, Paolo Pani | Nonlinear photon-plasma interaction and the black hole superradiant
instability | 17 pages, 10 figures, animations of the simulations available at
https://web.uniroma1.it/gmunu . v2: Minor corrections and extended
discussion. v3: Typographical corrections. To appear in PRD | null | null | null | gr-qc astro-ph.HE hep-ph physics.plasm-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Electromagnetic field confinement due to plasma near accreting black holes
can trigger superradiant instabilities at the linear level, limiting the spin
of black holes and providing novel astrophysical sources of electromagnetic
bursts. However, nonlinear effects might jeopardize the efficiency of the
confinement, re... | [
{
"created": "Wed, 21 Jun 2023 18:03:31 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Dec 2023 11:18:05 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Dec 2023 18:40:47 GMT",
"version": "v3"
}
] | 2023-12-29 | [
[
"Cannizzaro",
"Enrico",
""
],
[
"Corelli",
"Fabrizio",
""
],
[
"Pani",
"Paolo",
""
]
] | Electromagnetic field confinement due to plasma near accreting black holes can trigger superradiant instabilities at the linear level, limiting the spin of black holes and providing novel astrophysical sources of electromagnetic bursts. However, nonlinear effects might jeopardize the efficiency of the confinement, rend... |
1710.02725 | David Wallace | David Wallace | The case for black hole thermodynamics, Part II: statistical mechanics | 34 pages; minor revisions only | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I present in detail the case for regarding black hole thermodynamics as
having a statistical-mechanical explanation in exact parallel with the
statistical-mechanical explanation believed to underly the thermodynamics of
other systems. (Here I presume that black holes are indeed thermodynamic
systems in the fullest se... | [
{
"created": "Sat, 7 Oct 2017 19:17:38 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jun 2018 00:17:09 GMT",
"version": "v2"
}
] | 2018-06-18 | [
[
"Wallace",
"David",
""
]
] | I present in detail the case for regarding black hole thermodynamics as having a statistical-mechanical explanation in exact parallel with the statistical-mechanical explanation believed to underly the thermodynamics of other systems. (Here I presume that black holes are indeed thermodynamic systems in the fullest sens... |
1107.5157 | Yongge Ma | Xiangdong Zhang and Yongge Ma | Nonperturbative Loop Quantization of Scalar-Tensor Theories of Gravity | 18 pages, the sector of $\omega(\phi)=-3/2$ included, to be published
in PRD | Phys. Rev. D 84, 104045 (2011) | 10.1103/PhysRevD.84.104045 | null | gr-qc hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hamiltonian formulation of scalar-tensor theories of gravity is derived
from their Lagrangian formulation by Hamiltonian analysis. The Hamiltonian
formalism marks off two sectors of the theories by the coupling parameter
$\omega(\phi)$. In the sector of $\omega(\phi)=-3/2$, the feasible theories are
restricted an... | [
{
"created": "Tue, 26 Jul 2011 10:20:11 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Nov 2011 12:58:27 GMT",
"version": "v2"
}
] | 2015-05-28 | [
[
"Zhang",
"Xiangdong",
""
],
[
"Ma",
"Yongge",
""
]
] | The Hamiltonian formulation of scalar-tensor theories of gravity is derived from their Lagrangian formulation by Hamiltonian analysis. The Hamiltonian formalism marks off two sectors of the theories by the coupling parameter $\omega(\phi)$. In the sector of $\omega(\phi)=-3/2$, the feasible theories are restricted and ... |
0901.4463 | Michael Maziashvili | Michael Maziashvili | Black hole remnants in RG modified gravity? | 2 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The idea of black hole remnants for RG modified Schwarzschild solution
constructed in papers [hep-th/0002196; hep-th/0602159] depends essentially on
the positiveness of a parameter that enters the running Newton constant. The
positiveness of this parameter was established by comparing the large distance
expansion of ... | [
{
"created": "Wed, 28 Jan 2009 14:06:47 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jun 2009 04:20:48 GMT",
"version": "v2"
}
] | 2009-06-23 | [
[
"Maziashvili",
"Michael",
""
]
] | The idea of black hole remnants for RG modified Schwarzschild solution constructed in papers [hep-th/0002196; hep-th/0602159] depends essentially on the positiveness of a parameter that enters the running Newton constant. The positiveness of this parameter was established by comparing the large distance expansion of RG... |
2004.04646 | Asuka Ito | Asuka Ito, Jiro Soda | A formalism for magnon gravitational wave detectors | 33 pages, 2 figures, minor changes | Eur. Phys. J. C 80, 545 (2020) | 10.1140/epjc/s10052-020-8092-6 | KOBE-COSMO-20-07 | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to detect high frequency gravitational waves, we need a new
detection method. In this paper, we develop a formalism for a gravitational
wave detector using magnons in a cavity. Using Fermi normal coordinates and
taking the non-relativistic limit, we obtain a Hamiltonian for magnons in
gravitational wave back... | [
{
"created": "Wed, 8 Apr 2020 12:51:59 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Jun 2020 06:04:26 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Sep 2021 03:09:29 GMT",
"version": "v3"
}
] | 2021-09-06 | [
[
"Ito",
"Asuka",
""
],
[
"Soda",
"Jiro",
""
]
] | In order to detect high frequency gravitational waves, we need a new detection method. In this paper, we develop a formalism for a gravitational wave detector using magnons in a cavity. Using Fermi normal coordinates and taking the non-relativistic limit, we obtain a Hamiltonian for magnons in gravitational wave backgr... |
2405.17400 | Digvijay Wadekar | Digvijay Wadekar, Tejaswi Venumadhav, Javier Roulet, Ajit Kumar Mehta,
Barak Zackay, Jonathan Mushkin, Matias Zaldarriaga | A new search pipeline for gravitational waves with higher-order modes
using mode-by-mode filtering | 10+4 pages, 5 figures | null | null | null | gr-qc astro-ph.CO astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nearly all template-based gravitational wave (GW) searches only include the
quasi-circular quadrupolar modes of the signals in their templates. Including
additional degrees of freedom in the GW templates corresponding to higher-order
harmonics, orbital precession, or eccentricity is challenging because: ($i$)
the siz... | [
{
"created": "Mon, 27 May 2024 17:49:25 GMT",
"version": "v1"
}
] | 2024-05-28 | [
[
"Wadekar",
"Digvijay",
""
],
[
"Venumadhav",
"Tejaswi",
""
],
[
"Roulet",
"Javier",
""
],
[
"Mehta",
"Ajit Kumar",
""
],
[
"Zackay",
"Barak",
""
],
[
"Mushkin",
"Jonathan",
""
],
[
"Zaldarriaga",
"Matias",
... | Nearly all template-based gravitational wave (GW) searches only include the quasi-circular quadrupolar modes of the signals in their templates. Including additional degrees of freedom in the GW templates corresponding to higher-order harmonics, orbital precession, or eccentricity is challenging because: ($i$) the size ... |
2108.12424 | Z. Yousaf | Z. Tariq, M. Z. Bhatti, Z. Yousaf | On the Stability of Pressure Isotropy Condition in Palatini $f(R)$
Gravity | 23 pages, no figure | Int. J. Mod. Phys. D 30, 2150058 (2021) | 10.1142/S0218271821500589 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This manuscript copes with the issue of analyzing the conditions to check the
stability of the pressure isotropy condition by taking into account a
spherically symmetric dissipative astrophysical configuration with the Palatini
$f(R)$ gravity theory. We work out a differential equation in terms of the Weyl
scalar tha... | [
{
"created": "Fri, 27 Aug 2021 05:06:22 GMT",
"version": "v1"
}
] | 2021-08-31 | [
[
"Tariq",
"Z.",
""
],
[
"Bhatti",
"M. Z.",
""
],
[
"Yousaf",
"Z.",
""
]
] | This manuscript copes with the issue of analyzing the conditions to check the stability of the pressure isotropy condition by taking into account a spherically symmetric dissipative astrophysical configuration with the Palatini $f(R)$ gravity theory. We work out a differential equation in terms of the Weyl scalar that ... |
2307.08953 | Xi-Long Fan | Kun Meng, Xi-Long Fan, Song Li, Wen-Biao Han and Hongsheng Zhang | Dynamics of null particles and shadow for general rotating black hole | 21 pages, 9 figures | J. High Energ. Phys. 2023, 141 (2023) | 10.1007/JHEP11(2023)141 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Johannsen black hole (BH) is a generic rotating BH admitting three
constants of motions (energy, angular momentum, and Carter constant) and is
characterized by four deviation parameters besides mass and spin, which could
be a model-independent probe of the no-hair theorem. We systematically study
the dynamics of ... | [
{
"created": "Tue, 18 Jul 2023 03:46:50 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Sep 2023 06:55:23 GMT",
"version": "v2"
},
{
"created": "Wed, 29 Nov 2023 01:08:54 GMT",
"version": "v3"
}
] | 2023-11-30 | [
[
"Meng",
"Kun",
""
],
[
"Fan",
"Xi-Long",
""
],
[
"Li",
"Song",
""
],
[
"Han",
"Wen-Biao",
""
],
[
"Zhang",
"Hongsheng",
""
]
] | The Johannsen black hole (BH) is a generic rotating BH admitting three constants of motions (energy, angular momentum, and Carter constant) and is characterized by four deviation parameters besides mass and spin, which could be a model-independent probe of the no-hair theorem. We systematically study the dynamics of nu... |
1512.08807 | David Kubiznak | David Kubiznak | Rotating black holes pierced by a cosmic string | 7 pages, 4 figures, Prepared for the MG14 Proceedings v2: small
changes | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A rotating black hole threaded by an infinitely long cosmic string is studied
in the framework of the Abelian Higgs model. We show that contrary to a common
belief, in the presence of rotation the backreaction of the string does not
induce a simple conical deficit. This leads to new distinct features of the
Kerr--str... | [
{
"created": "Tue, 29 Dec 2015 22:06:28 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Aug 2016 18:37:16 GMT",
"version": "v2"
}
] | 2016-08-09 | [
[
"Kubiznak",
"David",
""
]
] | A rotating black hole threaded by an infinitely long cosmic string is studied in the framework of the Abelian Higgs model. We show that contrary to a common belief, in the presence of rotation the backreaction of the string does not induce a simple conical deficit. This leads to new distinct features of the Kerr--strin... |
2210.04056 | Bibhas Majhi Ranjan | Gaurang Ramakant Kane, Bibhas Ranjan Majhi | Thermality of horizon through near horizon instability: a path integral
approach | Few clarifications added, to appear in Gen. Rel. Grav | null | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent investigations revealed that the near horizon Hamiltonian of a
massless, chargeless outgoing particle, for its particular motion in static as
well as stationary black holes, is effectively $\sim xp$ kind. This is unstable
by nature and has the potential to explain a few interesting physical
phenomena. From the... | [
{
"created": "Sat, 8 Oct 2022 15:52:49 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Oct 2023 05:16:37 GMT",
"version": "v2"
}
] | 2023-10-17 | [
[
"Kane",
"Gaurang Ramakant",
""
],
[
"Majhi",
"Bibhas Ranjan",
""
]
] | Recent investigations revealed that the near horizon Hamiltonian of a massless, chargeless outgoing particle, for its particular motion in static as well as stationary black holes, is effectively $\sim xp$ kind. This is unstable by nature and has the potential to explain a few interesting physical phenomena. From the p... |
1002.2962 | Charles Wang | Charles H.-T. Wang, Robert Bingham, J. Tito Mendonca | Probing spacetime fluctuations using cold atom traps | 8 pages; published version | AIP Conference Proceedings 1421, 203-211 (2012) | 10.1063/1.3679598 | null | gr-qc cond-mat.quant-gas quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the position oscillation of a particle that models the center
of mass quantum state of a trapped Bose-Einstein condensate coupled to the
zero-point fluctuations of the gravitational field. A semiclassical analysis is
performed that allows to calculate the mean square amplitude of the
oscillation. In an... | [
{
"created": "Tue, 16 Feb 2010 10:39:55 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Mar 2010 09:16:38 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Jan 2013 21:59:49 GMT",
"version": "v3"
}
] | 2013-01-07 | [
[
"Wang",
"Charles H. -T.",
""
],
[
"Bingham",
"Robert",
""
],
[
"Mendonca",
"J. Tito",
""
]
] | We investigate the position oscillation of a particle that models the center of mass quantum state of a trapped Bose-Einstein condensate coupled to the zero-point fluctuations of the gravitational field. A semiclassical analysis is performed that allows to calculate the mean square amplitude of the oscillation. In anal... |
2111.15197 | Yasuyuki Hatsuda | Yasuyuki Hatsuda, Masashi Kimura | Spectral Problems for Quasinormal Modes of Black Holes | This is a contribution to the special issue "Black Hole Physics and
Beyond: From the Ringdown Analysis with Gravitational Waves" (Editors:
Hiroyuki Nakano and Nami Uchikata) in Universe. V2: Published version | null | 10.3390/universe7120476 | RUP-21-22 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | This is an unconventional review article on spectral problems in black hole
perturbation theory. Our purpose is to explain how to apply various known
techniques in quantum mechanics to such spectral problems. The article includes
analytical/numerical treatments, semiclassical perturbation theory, the
(uniform) WKB me... | [
{
"created": "Tue, 30 Nov 2021 08:12:41 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Dec 2021 00:03:33 GMT",
"version": "v2"
}
] | 2021-12-23 | [
[
"Hatsuda",
"Yasuyuki",
""
],
[
"Kimura",
"Masashi",
""
]
] | This is an unconventional review article on spectral problems in black hole perturbation theory. Our purpose is to explain how to apply various known techniques in quantum mechanics to such spectral problems. The article includes analytical/numerical treatments, semiclassical perturbation theory, the (uniform) WKB meth... |
1809.10113 | Sebastian Khan | Sebastian Khan, Katerina Chatziioannou, Mark Hannam, Frank Ohme | Phenomenological model for the gravitational-wave signal from precessing
binary black holes with two-spin effects | 15 pages, 5 figures | Phys. Rev. D 100, 024059 (2019) | 10.1103/PhysRevD.100.024059 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The properties of compact binaries, such as masses and spins, are imprinted
in the gravitational-waves they emit and can be measured using parameterised
waveform models. Accurately and efficiently describing the complicated
precessional dynamics of the various angular momenta of the system in these
waveform models is... | [
{
"created": "Wed, 26 Sep 2018 16:47:03 GMT",
"version": "v1"
}
] | 2019-08-07 | [
[
"Khan",
"Sebastian",
""
],
[
"Chatziioannou",
"Katerina",
""
],
[
"Hannam",
"Mark",
""
],
[
"Ohme",
"Frank",
""
]
] | The properties of compact binaries, such as masses and spins, are imprinted in the gravitational-waves they emit and can be measured using parameterised waveform models. Accurately and efficiently describing the complicated precessional dynamics of the various angular momenta of the system in these waveform models is t... |
2009.02914 | Zurab Silagadze | Abhijit Sen, Shailesh Dhasmana, Zurab K. Silagadze | Free fall in KvN mechanics and Einstein's principle of equivalence | 46 pages, no figures, to be published in Annals of Physics | Annals Phys. 422 (2020), 168302 | 10.1016/j.aop.2020.168302 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The implementation of Einstein's principle of equivalence in Koopman-von
Neumann (KvN) mechanics is discussed. The implementation is very similar to the
implementation of this principle in quantum mechanics. This is not surprising,
because KvN mechanics provides a Hilbert space formulation of classical
mechanics that... | [
{
"created": "Mon, 7 Sep 2020 07:23:17 GMT",
"version": "v1"
}
] | 2020-09-28 | [
[
"Sen",
"Abhijit",
""
],
[
"Dhasmana",
"Shailesh",
""
],
[
"Silagadze",
"Zurab K.",
""
]
] | The implementation of Einstein's principle of equivalence in Koopman-von Neumann (KvN) mechanics is discussed. The implementation is very similar to the implementation of this principle in quantum mechanics. This is not surprising, because KvN mechanics provides a Hilbert space formulation of classical mechanics that i... |
1711.04270 | Plyatsko Roman | Roman Plyatsko, Mykola Fenyk, Volodymyr Panat | Highly relativistic spin-gravity-$\Lambda$ coupling | 10 pages | Physical Review D, v.96, 064038 (2017) | 10.1103/PhysRevD.96.064038 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effects of highly relativistic spin-gravity coupling in the
Schwarzschild-de Sitter background which follow from the Mathisson-Papapetrou
equations are investigated. The dependence of gravitoelectric and
gravitomagnetic components of gravitational field on the velocity of an
observer which is moving in Schwarzsch... | [
{
"created": "Sun, 12 Nov 2017 10:48:59 GMT",
"version": "v1"
},
{
"created": "Sat, 1 Dec 2018 18:06:23 GMT",
"version": "v2"
}
] | 2018-12-04 | [
[
"Plyatsko",
"Roman",
""
],
[
"Fenyk",
"Mykola",
""
],
[
"Panat",
"Volodymyr",
""
]
] | The effects of highly relativistic spin-gravity coupling in the Schwarzschild-de Sitter background which follow from the Mathisson-Papapetrou equations are investigated. The dependence of gravitoelectric and gravitomagnetic components of gravitational field on the velocity of an observer which is moving in Schwarzschil... |
2009.12504 | Mieszko Rutkowski | Mieszko Rutkowski and Andrzej Rostworowski | The problem of ultracompact rotating gravastars | 11 pages, revised version | Phys. Rev. D 104, 084041 (2021) | 10.1103/PhysRevD.104.084041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A number of authors provided arguments that a rotating gravastar is a good
candidate for a source of the Kerr metric. These arguments were based on the
second order perturbation analysis. In the following paper, we construct a
perturbative solution of the rotating gravastar up to the third perturbation
order and show... | [
{
"created": "Sat, 26 Sep 2020 02:20:59 GMT",
"version": "v1"
},
{
"created": "Wed, 26 May 2021 10:22:14 GMT",
"version": "v2"
}
] | 2021-11-05 | [
[
"Rutkowski",
"Mieszko",
""
],
[
"Rostworowski",
"Andrzej",
""
]
] | A number of authors provided arguments that a rotating gravastar is a good candidate for a source of the Kerr metric. These arguments were based on the second order perturbation analysis. In the following paper, we construct a perturbative solution of the rotating gravastar up to the third perturbation order and show t... |
gr-qc/9511009 | Herbert Liebl | M.O. Katanaev (Vienna, ESI), W. Kummer and H. Liebl (Vienna, Tech. U.) | Geometric Interpretation and Classification of Global Solutions in
Generalized Dilaton Gravity | 21 pages, 6 Postscript figures | Phys.Rev.D53:5609-5618,1996 | 10.1103/PhysRevD.53.5609 | TUW-95-09 | gr-qc hep-th | null | Two dimensional gravity with torsion is proved to be equivalent to special
types of generalized 2d dilaton gravity. E.g. in one version, the dilaton field
is shown to be expressible by the extra scalar curvature, constructed for an
independent Lorentz connection corresponding to a nontrivial torsion.
Elimination of t... | [
{
"created": "Thu, 2 Nov 1995 12:12:15 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Katanaev",
"M. O.",
"",
"Vienna, ESI"
],
[
"Kummer",
"W.",
"",
"Vienna, Tech. U."
],
[
"Liebl",
"H.",
"",
"Vienna, Tech. U."
]
] | Two dimensional gravity with torsion is proved to be equivalent to special types of generalized 2d dilaton gravity. E.g. in one version, the dilaton field is shown to be expressible by the extra scalar curvature, constructed for an independent Lorentz connection corresponding to a nontrivial torsion. Elimination of tha... |
1201.4112 | Alexander Shatskiy Dr. | Igor Novikov and Alexander Shatskiy | On stability of a new model of wormhole | 9 pages, 1 figure | Journal of Experimental and Theoretical Physics, 2012, Vol.141, No
5 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the stability of the wormhole of the
Mors-Thorne-Ellis-Bronnikov type. In our model the matter inside it consists of
a radial magnetic field and an ideal phantom-fluid. Properties of the matter
are described in section 1, 2 and 3 of this paper. We consider spherical
perturbations only and find examples... | [
{
"created": "Thu, 19 Jan 2012 17:13:24 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Apr 2012 13:19:53 GMT",
"version": "v2"
}
] | 2012-04-10 | [
[
"Novikov",
"Igor",
""
],
[
"Shatskiy",
"Alexander",
""
]
] | We investigate the stability of the wormhole of the Mors-Thorne-Ellis-Bronnikov type. In our model the matter inside it consists of a radial magnetic field and an ideal phantom-fluid. Properties of the matter are described in section 1, 2 and 3 of this paper. We consider spherical perturbations only and find examples o... |
gr-qc/0512127 | Silke Weinfurtner | Silke Weinfurtner, Stefano Liberati, and Matt Visser | Modelling Planck-scale Lorentz violation via analogue models | Talk given at the Fourth Meeting on Constrained Dynamics and Quantum
Gravity (QG05), Cala Gonone (Sardinia, Italy) September 12-16, 2005 | J.Phys.Conf.Ser. 33 (2006) 373-385 | 10.1088/1742-6596/33/1/046 | null | gr-qc | null | Astrophysical tests of Planck-suppressed Lorentz violations had been
extensively studied in recent years and very stringent constraints have been
obtained within the framework of effective field theory. There are however
still some unresolved theoretical issues, in particular regarding the so called
"naturalness prob... | [
{
"created": "Thu, 22 Dec 2005 04:13:32 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Weinfurtner",
"Silke",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Visser",
"Matt",
""
]
] | Astrophysical tests of Planck-suppressed Lorentz violations had been extensively studied in recent years and very stringent constraints have been obtained within the framework of effective field theory. There are however still some unresolved theoretical issues, in particular regarding the so called "naturalness proble... |
2108.10334 | Sayantan Choudhury | Kiran Adhikari, Sayantan Choudhury, Hardey N. Pandya, Rohan Srivastava | Primordial Gravitational Wave Circuit Complexity | 113 pages, 18 figures, 1 appendix, Revised version, Accepted for
publication in Symmetry (section: Physics and Symmetry/Asymmetry, Special
issue: "Role of Black Holes in Testing Modified Theories of Gravity") | Symmetry 2023, 15(3), 664 | 10.3390/sym15030664 | null | gr-qc cond-mat.stat-mech hep-ph hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we investigate various physical implications of quantum
circuit complexity using squeezed state formalism of Primordial Gravitational
Waves (PGW). Recently quantum information theoretic concepts, such as
entanglement entropy, and complexity are playing a pivotal role to understand
the dynamics of qua... | [
{
"created": "Mon, 23 Aug 2021 18:00:12 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Sep 2021 09:00:33 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Mar 2023 15:11:18 GMT",
"version": "v3"
}
] | 2023-03-07 | [
[
"Adhikari",
"Kiran",
""
],
[
"Choudhury",
"Sayantan",
""
],
[
"Pandya",
"Hardey N.",
""
],
[
"Srivastava",
"Rohan",
""
]
] | In this article, we investigate various physical implications of quantum circuit complexity using squeezed state formalism of Primordial Gravitational Waves (PGW). Recently quantum information theoretic concepts, such as entanglement entropy, and complexity are playing a pivotal role to understand the dynamics of quant... |
gr-qc/9909049 | Roberto Scipioni | Roberto Scipioni | On the extension of the Obukhov theorem in non-Riemannian gravity I | 12 pages, no figures, final version for J. Math. Phys | J.Math.Phys. 41 (2000) 3028-3034 | 10.1063/1.533289 | null | gr-qc | null | This is a first paper of a series in which we give some generalizations of
the Obukhov theorem in the Tucker-Wang approach to Metric- Affine gravity in
which we consider more general actions containing scalar and in general fields
which do not depend on the metric or connection.
| [
{
"created": "Wed, 15 Sep 1999 17:25:23 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Scipioni",
"Roberto",
""
]
] | This is a first paper of a series in which we give some generalizations of the Obukhov theorem in the Tucker-Wang approach to Metric- Affine gravity in which we consider more general actions containing scalar and in general fields which do not depend on the metric or connection. |
2406.12576 | Teodor Borislavov Vasilev | Teodor Borislavov Vasilev, Mariam Bouhmadi-L\'opez, Prado
Mart\'in-Moruno | Dark energy with a shift-symmetric scalar field: obstacles, loophole
hunting and dead ends | 21 pages, 6 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We discuss the possibility of a scalar field being the fundamental
description of dark energy without the need of self-tuning any parameter.
Thereby, we focus on shift-symmetric scalar-tensor theories satisfying also
that the propagation speed of gravitational waves is equal to the speed of
light. Analysing the stabi... | [
{
"created": "Tue, 18 Jun 2024 13:03:18 GMT",
"version": "v1"
}
] | 2024-06-19 | [
[
"Vasilev",
"Teodor Borislavov",
""
],
[
"Bouhmadi-López",
"Mariam",
""
],
[
"Martín-Moruno",
"Prado",
""
]
] | We discuss the possibility of a scalar field being the fundamental description of dark energy without the need of self-tuning any parameter. Thereby, we focus on shift-symmetric scalar-tensor theories satisfying also that the propagation speed of gravitational waves is equal to the speed of light. Analysing the stabili... |
2308.01363 | Abraham Espinoza-Garc\'ia | Luis Rey D\'iaz-Barr\'on, Abraham Espinoza-Garc\'ia, S.
P\'erez-Pay\'an, and J. Socorro | Noncommutative effective LQC: A (pre-)inflationary dynamics
investigation | 22 pages, 18 figures, 1 table | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We conduct a (pre-)inflationary dynamics study within the framework of a
simple noncommutative extension of effective loop quantum cosmology -- put
forward recently by the authors -- which preserves its key features (in
particular, the quantum bounce is maintained). A thorough investigation shows
that the (pre-)infla... | [
{
"created": "Wed, 2 Aug 2023 18:08:32 GMT",
"version": "v1"
}
] | 2023-08-04 | [
[
"Díaz-Barrón",
"Luis Rey",
""
],
[
"Espinoza-García",
"Abraham",
""
],
[
"Pérez-Payán",
"S.",
""
],
[
"Socorro",
"J.",
""
]
] | We conduct a (pre-)inflationary dynamics study within the framework of a simple noncommutative extension of effective loop quantum cosmology -- put forward recently by the authors -- which preserves its key features (in particular, the quantum bounce is maintained). A thorough investigation shows that the (pre-)inflati... |
1607.07113 | Quentin G. Bailey | Quentin G. Bailey | Gravity Sector of the SME | 4 pages, Presented at the Seventh Meeting on CPT and Lorentz
Symmetry, Bloomington, Indiana, June 20-24, 2016 | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this talk, the gravity sector of the effective field theory description of
local Lorentz violation is discussed, including minimal and nonminimal
curvature couplings. Also, recent experimental and observational analyses
including solar-system ephemeris and short-range gravity tests are reviewed.
| [
{
"created": "Mon, 25 Jul 2016 00:23:04 GMT",
"version": "v1"
}
] | 2016-07-26 | [
[
"Bailey",
"Quentin G.",
""
]
] | In this talk, the gravity sector of the effective field theory description of local Lorentz violation is discussed, including minimal and nonminimal curvature couplings. Also, recent experimental and observational analyses including solar-system ephemeris and short-range gravity tests are reviewed. |
1708.08667 | Sergio Zerbini | Stefano Chinaglia, Aimeric Colleaux and Sergio Zerbini | A non-polynomial gravity formulation for Loop Quantum Cosmology bounce | 7 pages, minor modifications, references added, accepted version | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently the so-called mimetic gravity approach has been used to obtain
corrections to Friedmann equation of General Relativity similar to the ones
present in loop quantum cosmology. In this paper, we propose an alternative way
to derive this modified Friedmann equation via the so-called non-polynomial
gravity approa... | [
{
"created": "Tue, 29 Aug 2017 09:50:59 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Sep 2017 07:43:18 GMT",
"version": "v2"
}
] | 2017-09-06 | [
[
"Chinaglia",
"Stefano",
""
],
[
"Colleaux",
"Aimeric",
""
],
[
"Zerbini",
"Sergio",
""
]
] | Recently the so-called mimetic gravity approach has been used to obtain corrections to Friedmann equation of General Relativity similar to the ones present in loop quantum cosmology. In this paper, we propose an alternative way to derive this modified Friedmann equation via the so-called non-polynomial gravity approach... |
gr-qc/9804014 | Andrzej Krolak | Piotr Jaranowski, Andrzej Kr\'olak and Bernard F. Schutz | Data analysis of gravitational-wave signals from spinning neutron stars.
I. The signal and its detection | LaTeX, 38 pages, 13 figures submitted to Phys. Rev. D | Phys.Rev.D58:063001,1998 | 10.1103/PhysRevD.58.063001 | null | gr-qc | null | We present a theoretical background for the data analysis of the
gravitational-wave signals from spinning neutron stars for Earth-based laser
interferometric detectors. We introduce a detailed model of the signal
including both the frequency and the amplitude modulations. We include the
effects of the intrinsic frequ... | [
{
"created": "Sun, 5 Apr 1998 19:01:10 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Jaranowski",
"Piotr",
""
],
[
"Królak",
"Andrzej",
""
],
[
"Schutz",
"Bernard F.",
""
]
] | We present a theoretical background for the data analysis of the gravitational-wave signals from spinning neutron stars for Earth-based laser interferometric detectors. We introduce a detailed model of the signal including both the frequency and the amplitude modulations. We include the effects of the intrinsic frequen... |
2011.11886 | Tanmoy Paul | Indrani Banerjee, Tanmoy Paul, Soumitra SenGupta | Bouncing cosmology in a curved braneworld | JCAP accepted | null | 10.1088/1475-7516/2021/02/041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the possibility of a non-singular bounce in our universe from a
warped braneworld scenario with dynamical branes and a non-zero brane
cosmological constant. Such models naturally incorporate a scalar sector known
as the radion originating from the modulus of the theory. The presence of brane
cosmological c... | [
{
"created": "Tue, 24 Nov 2020 04:15:31 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Jan 2021 15:12:07 GMT",
"version": "v2"
}
] | 2021-03-03 | [
[
"Banerjee",
"Indrani",
""
],
[
"Paul",
"Tanmoy",
""
],
[
"SenGupta",
"Soumitra",
""
]
] | We explore the possibility of a non-singular bounce in our universe from a warped braneworld scenario with dynamical branes and a non-zero brane cosmological constant. Such models naturally incorporate a scalar sector known as the radion originating from the modulus of the theory. The presence of brane cosmological con... |
1002.0809 | Adrian Melissinos | Adrian Melissinos and Ashok Das | The response of laser interferometers to a gravitational wave | null | null | 10.1119/1.3443566 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Laser interferometer detectors are now widely used in an attempt to detect
gravitational waves (gw). The interaction of the gw with the light circulating
in the interferometer is usually explained in terms of the motion of the "free"
mirrors that form the interferometer arms. It is however instructive to show
that th... | [
{
"created": "Wed, 3 Feb 2010 17:57:41 GMT",
"version": "v1"
}
] | 2015-05-18 | [
[
"Melissinos",
"Adrian",
""
],
[
"Das",
"Ashok",
""
]
] | Laser interferometer detectors are now widely used in an attempt to detect gravitational waves (gw). The interaction of the gw with the light circulating in the interferometer is usually explained in terms of the motion of the "free" mirrors that form the interferometer arms. It is however instructive to show that the ... |
2305.01767 | Masaya Amo | Masaya Amo, Keisuke Izumi, Yoshimune Tomikawa, Tetsuya Shiromizu and
Hirotaka Yoshino | Asymptotic behavior of null geodesics near future null infinity IV:
Null-access theorem for generic asymptotically flat spacetime | 16 pages, no figures | null | 10.1103/PhysRevD.107.124050 | YITP-23-49 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In our previous papers [arXiv:2106.03150, arXiv:2110.10917,
arXiv:2208.00822], we analyzed the asymptotic behavior of future directed null
geodesics near future null infinity and then we showed a proposition on the
accessibility of the null geodesics to future null infinity in a specific class
of asymptotically flat ... | [
{
"created": "Tue, 2 May 2023 20:17:54 GMT",
"version": "v1"
}
] | 2023-07-12 | [
[
"Amo",
"Masaya",
""
],
[
"Izumi",
"Keisuke",
""
],
[
"Tomikawa",
"Yoshimune",
""
],
[
"Shiromizu",
"Tetsuya",
""
],
[
"Yoshino",
"Hirotaka",
""
]
] | In our previous papers [arXiv:2106.03150, arXiv:2110.10917, arXiv:2208.00822], we analyzed the asymptotic behavior of future directed null geodesics near future null infinity and then we showed a proposition on the accessibility of the null geodesics to future null infinity in a specific class of asymptotically flat sp... |
gr-qc/0605092 | Marcelo S. Berman | Marcelo Samuel Berman | Cosmological Model for the Very Early Universe in B.D. Theory | 5 pages including front page. To be submitted to Astrophysics and
Space Science | null | null | null | gr-qc | null | Following a paper by Berman and Marinho Jr (2001), where it was established
an equation of state (p=-(1/3)rho), for the very early Universe, under which,
Einstein's equations with lambda=0, render a scale-factor proportional to the
time coordinate, and under which, Berman(2006, 2006a) showed that in the
non-null lamb... | [
{
"created": "Wed, 17 May 2006 10:44:59 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Berman",
"Marcelo Samuel",
""
]
] | Following a paper by Berman and Marinho Jr (2001), where it was established an equation of state (p=-(1/3)rho), for the very early Universe, under which, Einstein's equations with lambda=0, render a scale-factor proportional to the time coordinate, and under which, Berman(2006, 2006a) showed that in the non-null lambda... |
gr-qc/0411138 | Thomas Thiemann | Bianca Dittrich and Thomas Thiemann | Testing the Master Constraint Programme for Loop Quantum Gravity I.
General Framework | 42 pages, no figures | Class.Quant.Grav. 23 (2006) 1025-1066 | 10.1088/0264-9381/23/4/001 | AEI-2004-116 | gr-qc hep-th math-ph math.MP | null | Recently the Master Constraint Programme for Loop Quantum Gravity (LQG) was
proposed as a classically equivalent way to impose the infinite number of
Wheeler -- DeWitt constraint equations in terms of a single Master Equation.
While the proposal has some promising abstract features, it was until now
barely tested in ... | [
{
"created": "Mon, 29 Nov 2004 19:01:19 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Dittrich",
"Bianca",
""
],
[
"Thiemann",
"Thomas",
""
]
] | Recently the Master Constraint Programme for Loop Quantum Gravity (LQG) was proposed as a classically equivalent way to impose the infinite number of Wheeler -- DeWitt constraint equations in terms of a single Master Equation. While the proposal has some promising abstract features, it was until now barely tested in kn... |
2308.12037 | Tiago Fran\c{c}a | Tiago Fran\c{c}a | Binary Black Holes in Modified Gravity | Ph.D. thesis; Supervisor: Pau Figueras; 252 pages, 69 figures, 6
tables; 2 Youtube videos https://www.youtube.com/watch?v=cfXF1wIcIJc and
https://www.youtube.com/watch?v=uOed4AG1ulg | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this thesis, we use numerical relativity to investigate gravitational
waves from binary black holes in extensions of GR. We first study spherically
symmetric gravitational collapse in cubic Horndeski theories of gravity. By
varying the coupling constants and the initial amplitude of the scalar field,
we determine ... | [
{
"created": "Wed, 23 Aug 2023 09:54:43 GMT",
"version": "v1"
}
] | 2023-08-24 | [
[
"França",
"Tiago",
""
]
] | In this thesis, we use numerical relativity to investigate gravitational waves from binary black holes in extensions of GR. We first study spherically symmetric gravitational collapse in cubic Horndeski theories of gravity. By varying the coupling constants and the initial amplitude of the scalar field, we determine th... |
0807.0477 | Jiliang Jing | Chikun Ding and Jiliang Jing | What kinds of coordinate can keep the Hawking temperature invariant for
the static spherically symmetric black hole? | 10 pages | Class.Quant.Grav.25:145015,2008 | 10.1088/0264-9381/25/14/145015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By studying the Hawking radiation of the most general static spherically
symmetric black hole arising from scalar and Dirac particles tunnelling, we
find the Hawking temperature is invariant in the general coordinate
representation (\ref{arbitrary1}), which satisfies two conditions: a) its
radial coordinate transform... | [
{
"created": "Thu, 3 Jul 2008 02:43:33 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ding",
"Chikun",
""
],
[
"Jing",
"Jiliang",
""
]
] | By studying the Hawking radiation of the most general static spherically symmetric black hole arising from scalar and Dirac particles tunnelling, we find the Hawking temperature is invariant in the general coordinate representation (\ref{arbitrary1}), which satisfies two conditions: a) its radial coordinate transformat... |
1301.3555 | Kenta Hotokezaka | Kenta Hotokezaka, Koutarou Kyutoku, and Masaru Shibata | Exploring tidal effects of coalescing binary neutron stars in numerical
relativity | 17 pages, 12 figures, accepted for publication in Physical Review D | null | 10.1103/PhysRevD.87.044001 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study gravitational waves emitted in the late inspiral stage of binary
neutron stars by analyzing the waveform obtained in numerical-relativity
simulations. For deriving the physical gravitational waveforms from the
numerical results, the resolution extrapolation plays an essential role for our
simulations. The ex... | [
{
"created": "Wed, 16 Jan 2013 02:00:22 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Mar 2013 14:14:43 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Hotokezaka",
"Kenta",
""
],
[
"Kyutoku",
"Koutarou",
""
],
[
"Shibata",
"Masaru",
""
]
] | We study gravitational waves emitted in the late inspiral stage of binary neutron stars by analyzing the waveform obtained in numerical-relativity simulations. For deriving the physical gravitational waveforms from the numerical results, the resolution extrapolation plays an essential role for our simulations. The extr... |
2309.09105 | Serhii Kryhin | Serhii Kryhin and Vivishek Sudhir | Distinguishable consequence of classical gravity on quantum matter | null | null | null | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | What if gravity is classical? If true, a consistent co-existence of classical
gravity and quantum matter requires that gravity exhibit irreducible classical
fluctuations. These fluctuations can mediate classical correlations between the
quantized motion of the gravitationally interacting matter. We use a consistent
t... | [
{
"created": "Sat, 16 Sep 2023 22:32:04 GMT",
"version": "v1"
}
] | 2023-09-19 | [
[
"Kryhin",
"Serhii",
""
],
[
"Sudhir",
"Vivishek",
""
]
] | What if gravity is classical? If true, a consistent co-existence of classical gravity and quantum matter requires that gravity exhibit irreducible classical fluctuations. These fluctuations can mediate classical correlations between the quantized motion of the gravitationally interacting matter. We use a consistent the... |
1701.06929 | Mahamat Saleh | Mahamat Saleh, Bouetou Bouetou Thomas and Kofane Timoleon Crepin | Energy distribution and thermodynamics of the quantum-corrected
Schwarzschild black hole | 4 pages, 3 figures | null | 10.1088/0256-307X/34/8/080401 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, energy distribution and thermodynamics are investigated in the
Schwarzschild black hole spacetime when considering corrections due to quantum
vacuum fluctuations. The Einstein and M{\o}ller prescriptions were used to
derive the expressions of the energy in the background. The temperature and
heat capaci... | [
{
"created": "Mon, 23 Jan 2017 11:34:24 GMT",
"version": "v1"
}
] | 2017-09-13 | [
[
"Saleh",
"Mahamat",
""
],
[
"Thomas",
"Bouetou Bouetou",
""
],
[
"Crepin",
"Kofane Timoleon",
""
]
] | In this work, energy distribution and thermodynamics are investigated in the Schwarzschild black hole spacetime when considering corrections due to quantum vacuum fluctuations. The Einstein and M{\o}ller prescriptions were used to derive the expressions of the energy in the background. The temperature and heat capacity... |
gr-qc/0512053 | Rainer Verch | Rainer Verch | Vacuum Fluctuations, Geometric Modular Action and Relativistic Quantum
Information Theory | 26 pages. Contribution for the Proceedings of a Conference on Special
Relativity held at Potsdam, 2005 | Lect.NotesPhys.702:133-162,2006 | 10.1007/3-540-34523-X_6 | null | gr-qc hep-th quant-ph | null | A summary of some lines of ideas leading to model-independent frameworks of
relativistic quantum field theory is given. It is followed by a discussion of
the Reeh-Schlieder theorem and geometric modular action of Tomita-Takesaki
modular objects associated with the quantum field vacuum state and certain
algebras of ob... | [
{
"created": "Thu, 8 Dec 2005 18:16:47 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Verch",
"Rainer",
""
]
] | A summary of some lines of ideas leading to model-independent frameworks of relativistic quantum field theory is given. It is followed by a discussion of the Reeh-Schlieder theorem and geometric modular action of Tomita-Takesaki modular objects associated with the quantum field vacuum state and certain algebras of obse... |
1308.2651 | Mart\'in G. Richarte MR | Mart\'in G. Richarte | Cylindrical wormholes with positive cosmological constant | 5 pages, no figures. Accepted for publication in PRD.
(http://link.aps.org/doi/10.1103/PhysRevD.88.027507) | Physical Review D 88, 027507 (2013) | 10.1103/PhysRevD.88.027507 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct cylindrical, traversable wormholes with finite radii by taking
into account the cut-and-paste procedure for the case of cosmic string
manifolds with a positive cosmological constant. Under reasonable assumptions
about the equation of state of the matter located at the shell, we find that
the wormhole thr... | [
{
"created": "Mon, 12 Aug 2013 19:13:22 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Aug 2013 17:34:21 GMT",
"version": "v2"
}
] | 2013-08-14 | [
[
"Richarte",
"Martín G.",
""
]
] | We construct cylindrical, traversable wormholes with finite radii by taking into account the cut-and-paste procedure for the case of cosmic string manifolds with a positive cosmological constant. Under reasonable assumptions about the equation of state of the matter located at the shell, we find that the wormhole throa... |
0712.0600 | Miguel S\'anchez | Miguel Sanchez | Some remarks on Causality Theory and Variational Methods in Lorentzian
manifolds | 12 pages, no figures, latex; published conference | Conf.Semin.Mat.Univ.BariNo.265(1997) | null | null | gr-qc | null | In this conference published in 1997 some problems on the geodesics of a
Lorentzian manifold concerning causality and infinite-dimensional variational
methods, are pointed out. Even though a big progress on many of these questions
have been carried out since then, some computations in this paper may be useful
and hav... | [
{
"created": "Tue, 4 Dec 2007 20:04:49 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Feb 2008 18:23:06 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Sanchez",
"Miguel",
""
]
] | In this conference published in 1997 some problems on the geodesics of a Lorentzian manifold concerning causality and infinite-dimensional variational methods, are pointed out. Even though a big progress on many of these questions have been carried out since then, some computations in this paper may be useful and have ... |
1010.3216 | Gustav Holzegel | Gustav Holzegel | Ultimately Schwarzschildean Spacetimes and the Black Hole Stability
Problem | 118 pages | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we introduce a class of spacetimes
$\left(\mathcal{M},g\right)$ which satisfy the vacuum Einstein equations and
dynamically approach a Schwarzschild solution of mass $M$, a class we shall
call \emph{ultimately Schwarzschildean spacetimes}. The approach is captured in
terms of boundedness and decay assu... | [
{
"created": "Fri, 15 Oct 2010 16:45:12 GMT",
"version": "v1"
}
] | 2010-10-18 | [
[
"Holzegel",
"Gustav",
""
]
] | In this paper, we introduce a class of spacetimes $\left(\mathcal{M},g\right)$ which satisfy the vacuum Einstein equations and dynamically approach a Schwarzschild solution of mass $M$, a class we shall call \emph{ultimately Schwarzschildean spacetimes}. The approach is captured in terms of boundedness and decay assump... |
2402.19310 | Bowen Zhao | Bowen Zhao, Lars Andersson and Shing-Tung Yau | Some Remarks on Wang-Yau Quasi-Local Mass | null | null | null | null | gr-qc math-ph math.DG math.MP | http://creativecommons.org/publicdomain/zero/1.0/ | We review Wang-Yau quasi-local definitions along the line of gravitational
Hamiltonian. This makes clear the connection and difference between Wang-Yau
definition and Brown-York or even global ADM definition. We make a brief
comment on admissibility condition in Wang-Yau quasi-lcoal mass. We extend the
positivity pro... | [
{
"created": "Thu, 29 Feb 2024 16:15:41 GMT",
"version": "v1"
}
] | 2024-07-16 | [
[
"Zhao",
"Bowen",
""
],
[
"Andersson",
"Lars",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | We review Wang-Yau quasi-local definitions along the line of gravitational Hamiltonian. This makes clear the connection and difference between Wang-Yau definition and Brown-York or even global ADM definition. We make a brief comment on admissibility condition in Wang-Yau quasi-lcoal mass. We extend the positivity proof... |
2408.02699 | Ali \"Ovg\"un Dr. | Vitalii Vertogradov and Ali \"Ovg\"un | Exact Regular Black Hole Solutions with de Sitter Cores and Hagedorn
Fluid | 9 pages. two-columns,2 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we present three exact solutions to the Einstein field
equations, each showing different black hole models. The first solution
introduces a black hole with a variable equation of state, \( P=k(r)\rho \),
that can represent both singular and regular black holes based on parameters \(
M_0 \) and \( w_0 \... | [
{
"created": "Sun, 4 Aug 2024 15:28:02 GMT",
"version": "v1"
}
] | 2024-08-07 | [
[
"Vertogradov",
"Vitalii",
""
],
[
"Övgün",
"Ali",
""
]
] | In this paper, we present three exact solutions to the Einstein field equations, each showing different black hole models. The first solution introduces a black hole with a variable equation of state, \( P=k(r)\rho \), that can represent both singular and regular black holes based on parameters \( M_0 \) and \( w_0 \).... |
2204.12944 | Jo\~ao Lu\'is Rosa | Jo\~ao Lu\'is Rosa, Diego Rubiera-Garcia | Junction conditions of Palatini $f\left(\mathcal R,T\right)$ gravity | 11 pages | Phys. Rev. D 106, 064007 (2022) | 10.1103/PhysRevD.106.064007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We work out the junction conditions for the Palatini $f(\mathcal{R},T)$
extension of General Relativity, where $f$ is an arbitrary function of the
curvature scalar $\mathcal{R}$ of an independent connection, and of the trace
$T$ of the stress-energy tensor of the matter fields. We find such conditions
on the allowed ... | [
{
"created": "Wed, 27 Apr 2022 13:50:24 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Sep 2022 15:09:37 GMT",
"version": "v2"
}
] | 2022-09-07 | [
[
"Rosa",
"João Luís",
""
],
[
"Rubiera-Garcia",
"Diego",
""
]
] | We work out the junction conditions for the Palatini $f(\mathcal{R},T)$ extension of General Relativity, where $f$ is an arbitrary function of the curvature scalar $\mathcal{R}$ of an independent connection, and of the trace $T$ of the stress-energy tensor of the matter fields. We find such conditions on the allowed di... |
gr-qc/9705065 | Robert C. Myers | Robert C. Myers | Pure states don't wear black | 6 pages, harvmac.tex, awarded First Prize in the Gravity Research
Foundation Essay Competition, to appear in General Relativity and Gravitation | Gen.Rel.Grav.29:1217-1222,1997 | 10.1023/A:1018855611972 | McGill/97-09 | gr-qc hep-th | null | Recently, string theory has provided some remarkable new insights into the
microphysics of black holes. I argue that a simple and important lesson is also
provided with regards to the information loss paradox, namely, pure quantum
states do not form black holes! Thus it seems black hole formation, as well as
evaporat... | [
{
"created": "Fri, 23 May 1997 23:19:34 GMT",
"version": "v1"
}
] | 2011-08-04 | [
[
"Myers",
"Robert C.",
""
]
] | Recently, string theory has provided some remarkable new insights into the microphysics of black holes. I argue that a simple and important lesson is also provided with regards to the information loss paradox, namely, pure quantum states do not form black holes! Thus it seems black hole formation, as well as evaporatio... |
1301.7089 | Junpu Wang | Junpu Wang | Construction of the Conserved Non-linear Zeta via the Effective Action
for Perfect Fluids | 16 Pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the problem of how to construct the curvature perturbation
$\zeta$ to nonlinear levels, which is expected to evolve time independently on
super-horizon scales; in particular we concentrate on the situation where the
universe is dominated by a perfect fluid. We have used a low energy/long
wavelength effect... | [
{
"created": "Tue, 29 Jan 2013 22:31:53 GMT",
"version": "v1"
}
] | 2013-01-31 | [
[
"Wang",
"Junpu",
""
]
] | We consider the problem of how to construct the curvature perturbation $\zeta$ to nonlinear levels, which is expected to evolve time independently on super-horizon scales; in particular we concentrate on the situation where the universe is dominated by a perfect fluid. We have used a low energy/long wavelength effectiv... |
gr-qc/0208034 | Lior M. Burko | Lior M. Burko | Orbital evolution of a test particle around a black hole: higher-order
corrections | 4 pages, 3 Encapsulated PostScript figures | Phys.Rev. D67 (2003) 084001 | 10.1103/PhysRevD.67.084001 | null | gr-qc | null | We study the orbital evolution of a radiation-damped binary in the extreme
mass ratio limit, and the resulting waveforms, to one order beyond what can be
obtained using the conservation laws approach. The equations of motion are
solved perturbatively in the mass ratio (or the corresponding parameter in the
scalar fie... | [
{
"created": "Tue, 13 Aug 2002 21:52:41 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Burko",
"Lior M.",
""
]
] | We study the orbital evolution of a radiation-damped binary in the extreme mass ratio limit, and the resulting waveforms, to one order beyond what can be obtained using the conservation laws approach. The equations of motion are solved perturbatively in the mass ratio (or the corresponding parameter in the scalar field... |
gr-qc/0204053 | Alejandro Corichi | Alejandro Corichi, Jeronimo Cortez and Hernando Quevedo | On Unitary Time Evolution in Gowdy $T^3$ Cosmologies | 16 pages, no figures, latex file; references added, a proof included.
Final version to appear in IJMPD | Int.J.Mod.Phys. D11 (2002) 1451-1468 | 10.1142/S0218271802002281 | ICN-UNAM-02-02 | gr-qc | null | A non-perturbative canonical quantization of Gowdy $T^3$ polarized models
carried out recently is considered. This approach profits from the equivalence
between the symmetry reduced model and 2+1 gravity coupled to a massless real
scalar field. The system is partially gauge fixed and a choice of internal time
is perf... | [
{
"created": "Tue, 16 Apr 2002 16:11:42 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jun 2002 16:20:52 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Corichi",
"Alejandro",
""
],
[
"Cortez",
"Jeronimo",
""
],
[
"Quevedo",
"Hernando",
""
]
] | A non-perturbative canonical quantization of Gowdy $T^3$ polarized models carried out recently is considered. This approach profits from the equivalence between the symmetry reduced model and 2+1 gravity coupled to a massless real scalar field. The system is partially gauge fixed and a choice of internal time is perfor... |
2202.12743 | Grigory Volovik | G.E. Volovik | Negative Newton constant may destroy some conjectures | 4 pages, no figures, accepted for publication in Mod. Phys. Lett. A | null | 10.1142/S0217732322500341 | null | gr-qc cond-mat.other hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The magnitude and sign of the gravitational coupling $1/G$ depend on the
relations between different contributions from scalar, fermionic and vector
fields. In principle, this may give the zero and negative values of $1/G$ in
some hypothetical Universes with the proper relations between the fermionic and
bosonic spec... | [
{
"created": "Wed, 23 Feb 2022 06:24:25 GMT",
"version": "v1"
}
] | 2022-04-13 | [
[
"Volovik",
"G. E.",
""
]
] | The magnitude and sign of the gravitational coupling $1/G$ depend on the relations between different contributions from scalar, fermionic and vector fields. In principle, this may give the zero and negative values of $1/G$ in some hypothetical Universes with the proper relations between the fermionic and bosonic specie... |
gr-qc/0701141 | Giampiero Sindoni | Giampiero Sindoni, Claudio Paris and Paolo Ialongo | On the Systematic Errors in the Detection of the Lense-Thirring Effect
with a Mars Orbiter | null | null | null | null | gr-qc | null | We show here that the recent claim of a test of the Lense-Thirring effect
with an error of 0.5% using the Mars Global Surveyor is misleading and the
quoted error is incorrect by a factor of at least ten thousand. Indeed, the
simple error analysis of [1] neglects the role of some important systematic
errors affecting ... | [
{
"created": "Fri, 26 Jan 2007 17:37:14 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sindoni",
"Giampiero",
""
],
[
"Paris",
"Claudio",
""
],
[
"Ialongo",
"Paolo",
""
]
] | We show here that the recent claim of a test of the Lense-Thirring effect with an error of 0.5% using the Mars Global Surveyor is misleading and the quoted error is incorrect by a factor of at least ten thousand. Indeed, the simple error analysis of [1] neglects the role of some important systematic errors affecting th... |
gr-qc/9904007 | Mark D. Roberts | Mark D. Roberts | Exact Nonnull Wavelike Solutions to Gravity with Quadratic Lagrangians | 16 pages, no tables or diagrams, LaTex2e | Int.J.Mod.Phys.A9:167-179,1994 | 10.1142/S0217751X9400008X | null | gr-qc | null | Solutions to gravity with quadratic Lagrangians are found for the simple case
where the only nonconstant metric component is the lapse $N$ and the Riemann
tensor takes the form $R^{t}_{.itj}=-k_{i}k_{j}, i,j=1,2,3$; thus these
solutions depend on cross terms in the Riemann tensor and therefore complement
the lineariz... | [
{
"created": "Sun, 4 Apr 1999 15:52:34 GMT",
"version": "v1"
}
] | 2011-04-04 | [
[
"Roberts",
"Mark D.",
""
]
] | Solutions to gravity with quadratic Lagrangians are found for the simple case where the only nonconstant metric component is the lapse $N$ and the Riemann tensor takes the form $R^{t}_{.itj}=-k_{i}k_{j}, i,j=1,2,3$; thus these solutions depend on cross terms in the Riemann tensor and therefore complement the linearized... |
2310.11842 | B. S. Ratanpal | B. S. Ratanpal and Rinkal Patel | Anisotropic Approach: Compact star as generalized Model | 20 pages and 14 figures | Astrophys Space Sci 368, 21 (2023) | 10.1007/s10509-023-04171-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We studied a new class of interior solutions that are singular-free and
useful for describing anisotropic compact star objects with spherically
symmetric matter distribution. We have considered metric potential selecting
B_0^2 (r)=1/(1-r^2/R^2 )^n ,where n>2 . The various physical characteristics of
the model are spe... | [
{
"created": "Wed, 18 Oct 2023 09:48:35 GMT",
"version": "v1"
}
] | 2023-10-19 | [
[
"Ratanpal",
"B. S.",
""
],
[
"Patel",
"Rinkal",
""
]
] | We studied a new class of interior solutions that are singular-free and useful for describing anisotropic compact star objects with spherically symmetric matter distribution. We have considered metric potential selecting B_0^2 (r)=1/(1-r^2/R^2 )^n ,where n>2 . The various physical characteristics of the model are speci... |
1001.4077 | Yuk Tung Liu | Yuk Tung Liu, Zachariah B. Etienne, Stuart L. Shapiro | Evolution of near-extremal-spin black holes using the moving puncture
technique | 6 pages, 5 figs | Phys.Rev.D80:121503,2009 | 10.1103/PhysRevD.80.121503 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new radial coordinate to write the Kerr metric in puncture form.
Unlike the quasi-radial coordinate introduced previously, the horizon radius
remains finite in our radial coordinate in the extreme Kerr limit a/M -> 1.
This significantly improves the accuracy of the evolution of black holes with
spins clo... | [
{
"created": "Fri, 22 Jan 2010 21:00:08 GMT",
"version": "v1"
}
] | 2010-04-22 | [
[
"Liu",
"Yuk Tung",
""
],
[
"Etienne",
"Zachariah B.",
""
],
[
"Shapiro",
"Stuart L.",
""
]
] | We propose a new radial coordinate to write the Kerr metric in puncture form. Unlike the quasi-radial coordinate introduced previously, the horizon radius remains finite in our radial coordinate in the extreme Kerr limit a/M -> 1. This significantly improves the accuracy of the evolution of black holes with spins close... |
2402.11486 | Lixiang Chen | Haorong Wu, Xilong Fan, and Lixiang Chen | Orbital angular momentum spectrum and entanglement in a rotating
accelerated reference frame | null | Phys. Rev. D, 2024, 109:085020 | 10.1103/PhysRevD.109.085020 | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | The particle definition varies across different theories. The quantum field
theory in curved spacetime shows that from the perspective of a linearly
accelerated observer, an inertial empty space may be full of thermal particles.
This effect is known as the Unruh effect. When the degrees of freedom of
orbital angular ... | [
{
"created": "Sun, 18 Feb 2024 07:26:03 GMT",
"version": "v1"
},
{
"created": "Tue, 7 May 2024 00:24:46 GMT",
"version": "v2"
}
] | 2024-05-08 | [
[
"Wu",
"Haorong",
""
],
[
"Fan",
"Xilong",
""
],
[
"Chen",
"Lixiang",
""
]
] | The particle definition varies across different theories. The quantum field theory in curved spacetime shows that from the perspective of a linearly accelerated observer, an inertial empty space may be full of thermal particles. This effect is known as the Unruh effect. When the degrees of freedom of orbital angular mo... |
gr-qc/0408094 | Parampreet Singh | Martin Bojowald, Parampreet Singh, Aureliano Skirzewski | Coordinate time dependence in Quantum Gravity | 35 pages, 17 figure. Revised version. To appear in Phys. Rev. D | Phys.Rev. D70 (2004) 124022 | 10.1103/PhysRevD.70.124022 | null | gr-qc hep-th | null | The intuitive classical space-time picture breaks down in quantum gravity,
which makes a comparison and the development of semiclassical techniques quite
complicated. Using ingredients of the group averaging method to solve
constraints one can nevertheless introduce a classical coordinate time into the
quantum theory... | [
{
"created": "Mon, 30 Aug 2004 13:07:26 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Dec 2004 10:27:04 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Bojowald",
"Martin",
""
],
[
"Singh",
"Parampreet",
""
],
[
"Skirzewski",
"Aureliano",
""
]
] | The intuitive classical space-time picture breaks down in quantum gravity, which makes a comparison and the development of semiclassical techniques quite complicated. Using ingredients of the group averaging method to solve constraints one can nevertheless introduce a classical coordinate time into the quantum theory, ... |
gr-qc/0505136 | Gonzalo Olmo | Gonzalo J. Olmo | Post-Newtonian constraints on f(R) cosmologies in Palatini formalism | 8 pages, no figures | Phys.Rev.D 72, 083505 (2005) [combined with gr-qc/0505135] | 10.1103/PhysRevD.72.083505 | null | gr-qc astro-ph hep-th | null | We compute the complete post-Newtonian limit of the Palatini form of f(R)
gravities using a scalar-tensor representation. By comparing the predictions of
these theories with laboratory and solar system experiments, we find a set of
inequalities that any lagrangian f(R) must satisfy. The constraints imposed by
those i... | [
{
"created": "Thu, 26 May 2005 22:55:29 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Olmo",
"Gonzalo J.",
""
]
] | We compute the complete post-Newtonian limit of the Palatini form of f(R) gravities using a scalar-tensor representation. By comparing the predictions of these theories with laboratory and solar system experiments, we find a set of inequalities that any lagrangian f(R) must satisfy. The constraints imposed by those ine... |
2108.04746 | Lorenzo Aiello | Lorenzo Aiello, Jonathan W. Richardson, Sander M. Vermeulen, Hartmut
Grote, Craig Hogan, Ohkyung Kwon, Chris Stoughton | Constraints on scalar field dark matter from co-located Michelson
interferometers | null | Phys. Rev. Lett. 128, 121101 (2022) | 10.1103/PhysRevLett.128.121101 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Low-mass (sub-eV) scalar field dark matter may induce apparent oscillations
of fundamental constants, resulting in corresponding oscillations of the size
and the index of refraction of solids. Laser interferometers are highly
sensitive to changes in the size and index of refraction of the main
beamsplitter. Using cro... | [
{
"created": "Tue, 10 Aug 2021 15:18:33 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Oct 2021 14:47:29 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Mar 2022 12:26:06 GMT",
"version": "v3"
}
] | 2022-03-30 | [
[
"Aiello",
"Lorenzo",
""
],
[
"Richardson",
"Jonathan W.",
""
],
[
"Vermeulen",
"Sander M.",
""
],
[
"Grote",
"Hartmut",
""
],
[
"Hogan",
"Craig",
""
],
[
"Kwon",
"Ohkyung",
""
],
[
"Stoughton",
"Chris",
""
... | Low-mass (sub-eV) scalar field dark matter may induce apparent oscillations of fundamental constants, resulting in corresponding oscillations of the size and the index of refraction of solids. Laser interferometers are highly sensitive to changes in the size and index of refraction of the main beamsplitter. Using cross... |
1703.05857 | Prastik Mohanraj | Prastik Mohanraj | Parametric equations of the expansion of a closed universe with torsion | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the Friedmann equations for a closed universe with spin and torsion,
parametric equations for the scale factor and time are derived for the early
universe.
| [
{
"created": "Fri, 17 Mar 2017 00:51:02 GMT",
"version": "v1"
}
] | 2017-03-20 | [
[
"Mohanraj",
"Prastik",
""
]
] | Using the Friedmann equations for a closed universe with spin and torsion, parametric equations for the scale factor and time are derived for the early universe. |
2405.10559 | Tao Zhu | Jian-Ming Yan, Tao Zhu, Mustapha Azreg-A\"inou, Mubasher Jamil, and
Hoang Ky Nguyen | Observational test of ${\cal R}^{2}$ spacetimes with the S2 star in the
Milky Way galactic center | 11 pages, 5 figures, 1 table; v2: published in JCAP | JCAP 07 (2024) 071 | 10.1088/1475-7516/2024/07/071 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | A novel class of vacuum metrics expressible in analytical form was recently
found for pure $\mathcal R^2$ gravity, based on a groundwork put forth by
Buchdahl in 1962. These Buchdahl-inspired solutions offer a practical framework
for testing ${\cal R}^2$ gravity through empirical observations. Within a
subclass of as... | [
{
"created": "Fri, 17 May 2024 05:57:46 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Aug 2024 13:29:56 GMT",
"version": "v2"
}
] | 2024-08-08 | [
[
"Yan",
"Jian-Ming",
""
],
[
"Zhu",
"Tao",
""
],
[
"Azreg-Aïnou",
"Mustapha",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Nguyen",
"Hoang Ky",
""
]
] | A novel class of vacuum metrics expressible in analytical form was recently found for pure $\mathcal R^2$ gravity, based on a groundwork put forth by Buchdahl in 1962. These Buchdahl-inspired solutions offer a practical framework for testing ${\cal R}^2$ gravity through empirical observations. Within a subclass of asym... |
gr-qc/9906034 | Benjamin C. Harms | R. Casadio and B. Harms | Energy Absorption by the Dilaton Field around a Rotating Black Hole in a
Binary System | REVTeX, 13 pages, 3 figures | Phys.Rev.D60:104017,1999 | 10.1103/PhysRevD.60.104017 | UAHEP 9810 | gr-qc astro-ph hep-th | null | In this paper we analyze a binary system consisting of a star and a rotating
black hole. The electromagnetic radiation emitted by the star interacts with
the background of the black hole and stimulates the production of dilaton
waves. We then estimate the energy transferred from the electromagnetic
radiation of the s... | [
{
"created": "Thu, 10 Jun 1999 16:06:24 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Casadio",
"R.",
""
],
[
"Harms",
"B.",
""
]
] | In this paper we analyze a binary system consisting of a star and a rotating black hole. The electromagnetic radiation emitted by the star interacts with the background of the black hole and stimulates the production of dilaton waves. We then estimate the energy transferred from the electromagnetic radiation of the sta... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.