id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0108009 | K. R. P. Sjodin | K R P Sjodin and J A Vickers | The thin string limit of Cosmic Strings coupled to gravity | 29 pages, 2 figures | null | null | null | gr-qc | null | The thin string limit of Cosmic Strings is investigated using a description
in terms of Colombeau's theory of nonlinear generalised functions. It is shown
that in this description the energy-momentum tensor has a well defined thin
string limit. Furthermore the deficit angle of the conical spacetime that one
obtains i... | [
{
"created": "Thu, 2 Aug 2001 19:49:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sjodin",
"K R P",
""
],
[
"Vickers",
"J A",
""
]
] | The thin string limit of Cosmic Strings is investigated using a description in terms of Colombeau's theory of nonlinear generalised functions. It is shown that in this description the energy-momentum tensor has a well defined thin string limit. Furthermore the deficit angle of the conical spacetime that one obtains in ... |
2301.05413 | Liang-Bi Wu | Li-Ming Cao, Liang-Bi Wu, Yu-Sen Zhou | Constraint preserving boundary conditions in Bondi-Sachs gauge: a
numerical study of stability of pure AdS spacetime | revtex4, 15 pages, 7 figures, 2 tables | null | null | ICTS-USTC/PCFT-23-02 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the Bondi-Sachs gauge, the Einstein equations with a cosmological constant
coupled to a scalar field in spherical symmetry are cast into a first order
strongly hyperbolic formulation in which the lapse and shift are the
fundamental variables. For this system of equations, the lapse and shift are
ingoing characteri... | [
{
"created": "Fri, 13 Jan 2023 07:07:34 GMT",
"version": "v1"
}
] | 2023-01-16 | [
[
"Cao",
"Li-Ming",
""
],
[
"Wu",
"Liang-Bi",
""
],
[
"Zhou",
"Yu-Sen",
""
]
] | In the Bondi-Sachs gauge, the Einstein equations with a cosmological constant coupled to a scalar field in spherical symmetry are cast into a first order strongly hyperbolic formulation in which the lapse and shift are the fundamental variables. For this system of equations, the lapse and shift are ingoing characterist... |
gr-qc/0608104 | Tsunehiro Kobayashi | Tsunehiro Kobayashi | Tachyons described by infinitely degenereate massless-fields and dark
matters in the universe | 9 pages | null | null | null | gr-qc | null | A tachyon field having a negative squared-mass $-m_t^2$ can be described in
terms of massless fields degenerating infinitely with respect to helicities.
This picture for tachyons does not contradict causality. It is seen that the
tachyon vector field can be quenched from the interactions with matter fields,
and the e... | [
{
"created": "Wed, 23 Aug 2006 00:46:53 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Aug 2006 04:42:05 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Aug 2006 07:10:46 GMT",
"version": "v3"
},
{
"created": "Mon, 25 Dec 2006 00:56:06 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Kobayashi",
"Tsunehiro",
""
]
] | A tachyon field having a negative squared-mass $-m_t^2$ can be described in terms of massless fields degenerating infinitely with respect to helicities. This picture for tachyons does not contradict causality. It is seen that the tachyon vector field can be quenched from the interactions with matter fields, and the eff... |
1205.4857 | Hongbo Cheng | Jingyun Man, Hongbo Cheng | The analytical discussion on strong gravitaional lensing for a
gravitational source with a $f(R)$ global monopole | 11 pages, 5 figures. arXiv admin note: text overlap with
arXiv:1004.3423 | Physical Review D92(2015)024004 | 10.1103/PhysRevD.92.024004 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here the gravitational lensing in strong field limit of a Schwarzschild black
hole with a solid deficit angle owing to global monopole within the context of
the $f(R)$ gravity theory is investigated. We obtain the expressions of
deflection angle and time delay in the forms of elliptic integrals and discuss
the asympt... | [
{
"created": "Tue, 22 May 2012 09:50:08 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Jun 2015 12:19:56 GMT",
"version": "v2"
},
{
"created": "Sat, 27 Jun 2015 06:43:52 GMT",
"version": "v3"
}
] | 2015-09-23 | [
[
"Man",
"Jingyun",
""
],
[
"Cheng",
"Hongbo",
""
]
] | Here the gravitational lensing in strong field limit of a Schwarzschild black hole with a solid deficit angle owing to global monopole within the context of the $f(R)$ gravity theory is investigated. We obtain the expressions of deflection angle and time delay in the forms of elliptic integrals and discuss the asymptot... |
gr-qc/0406108 | Gregory V. Vereshchagin | G.V. Vereshchagin | Qualitative Approach to Semi-Classical Loop Quantum Cosmology | Online at http://www.iop.org/EJ/abstract/1475-7516/2004/07/013 | JCAP 0407 (2004) 013 | 10.1088/1475-7516/2004/07/013 | null | gr-qc | null | Recently the mechanism was found which allows avoidance of the cosmological
singularity within the semi-classical formulation of Loop Quantum Gravity.
Numerical studies show that the presence of self-interaction potential of the
scalar field allows generation of initial conditions for successful slow-roll
inflation. ... | [
{
"created": "Sat, 26 Jun 2004 11:44:40 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Jul 2004 06:49:40 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Vereshchagin",
"G. V.",
""
]
] | Recently the mechanism was found which allows avoidance of the cosmological singularity within the semi-classical formulation of Loop Quantum Gravity. Numerical studies show that the presence of self-interaction potential of the scalar field allows generation of initial conditions for successful slow-roll inflation. In... |
0709.1965 | Cosimo Bambi | C. Bambi, F. R. Urban | Natural extension of the Generalised Uncertainty Principle | 4 pages, 1 figure, v2 with added references, revised and extended as
published in CQG | Class.Quant.Grav.25:095006,2008 | 10.1088/0264-9381/25/9/095006 | WSU-HEP-0703 | gr-qc hep-th quant-ph | null | We discuss a gedanken experiment for the simultaneous measurement of the
position and momentum of a particle in de Sitter spacetime. We propose an
extension of the so-called generalized uncertainty principle (GUP) which
implies the existence of a minimum observable momentum. The new GUP is directly
connected to the n... | [
{
"created": "Thu, 13 Sep 2007 19:57:24 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Apr 2008 12:30:51 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bambi",
"C.",
""
],
[
"Urban",
"F. R.",
""
]
] | We discuss a gedanken experiment for the simultaneous measurement of the position and momentum of a particle in de Sitter spacetime. We propose an extension of the so-called generalized uncertainty principle (GUP) which implies the existence of a minimum observable momentum. The new GUP is directly connected to the non... |
0809.4927 | Nikolay Koshelev Anatolievich | N. A. Koshelev | Comments on scalar-tensor representation of nonlocally corrected gravity | 6 pages, refs added | Grav.Cosmol.15:220-223,2009 | 10.1134/S0202289309030049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The scalar-tensor representation of nonlocally corrected gravity is
considered. Some special solutions of the vacuum background equations were
obtained that indicate to the nonequivalence of the initial theory and its
scalar-tensor representation.
| [
{
"created": "Mon, 29 Sep 2008 10:39:32 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Oct 2008 12:45:04 GMT",
"version": "v2"
}
] | 2015-05-13 | [
[
"Koshelev",
"N. A.",
""
]
] | The scalar-tensor representation of nonlocally corrected gravity is considered. Some special solutions of the vacuum background equations were obtained that indicate to the nonequivalence of the initial theory and its scalar-tensor representation. |
1712.08339 | Alexander Zakharov | Alexander F. Zakharov, Predrag Jovanovic, Dusko Borka and Vesna Borka
Jovanovic | Different ways to estimate graviton mass | 6 pages, presented as an invited talk at the XXXI International
Workshop on High Energy Physics (IHEP, Protvino, Russia) | International Journal of Modern Physics: Conference Series, v 47
(2018) | 10.1142/S2010194518600960 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An experimental detection of graviton is extremely hard problem, however,
there are different ways to evaluate a graviton mass if it is non-vanishing.
Theories of massive gravity or theories with non-vanishing graviton mass
initially have a number of pathologies such as discontinuities, ghosts etc. In
last years theo... | [
{
"created": "Fri, 22 Dec 2017 08:33:09 GMT",
"version": "v1"
}
] | 2018-06-26 | [
[
"Zakharov",
"Alexander F.",
""
],
[
"Jovanovic",
"Predrag",
""
],
[
"Borka",
"Dusko",
""
],
[
"Jovanovic",
"Vesna Borka",
""
]
] | An experimental detection of graviton is extremely hard problem, however, there are different ways to evaluate a graviton mass if it is non-vanishing. Theories of massive gravity or theories with non-vanishing graviton mass initially have a number of pathologies such as discontinuities, ghosts etc. In last years theori... |
0711.2651 | Sebastiano Sonego | Hans Westman, Sebastiano Sonego | Coordinates, observables and symmetry in relativity | 37 pages | Annals of Physics 324 (2009) 1585-1611 | 10.1016/j.aop.2009.03.014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the interplay and connections between symmetry properties of
equations, the interpretation of coordinates, the construction of observables,
and the existence of physical relativity principles in spacetime theories.
Using the refined notion of an event as a ``point-coincidence'' between scalar
fields th... | [
{
"created": "Fri, 16 Nov 2007 16:54:06 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Jun 2009 08:49:32 GMT",
"version": "v2"
}
] | 2009-06-30 | [
[
"Westman",
"Hans",
""
],
[
"Sonego",
"Sebastiano",
""
]
] | We investigate the interplay and connections between symmetry properties of equations, the interpretation of coordinates, the construction of observables, and the existence of physical relativity principles in spacetime theories. Using the refined notion of an event as a ``point-coincidence'' between scalar fields that... |
1608.03231 | S. Kalyana Rama | S. Kalyana Rama | A Class of LQC--inspired Models for Homogeneous, Anisotropic Cosmology
in Higher Dimensional Early Universe | Version 1: 29 pages. Version 2: 33 pages. Subsection (3.1) added to
improve the presentation. A few minor changes made. A reference added.
Version 3: 34 pages, contains minor modifications and a few more references.
To appear in General Relativity and Gravitation | General Relativity and Gravitation (2016) 48:155 | 10.1007/s10714-016-2150-2 | IMSc/2016/08/03 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of a (3 + 1) dimensional homogeneous anisotropic universe is
modified by Loop Quantum Cosmology and, consequently, it has generically a big
bounce in the past instead of a big-bang singularity. This modified dynamics
can be well described by effective equations of motion. We generalise these
effective eq... | [
{
"created": "Wed, 10 Aug 2016 16:24:24 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Sep 2016 07:13:14 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Oct 2016 03:59:34 GMT",
"version": "v3"
}
] | 2016-11-11 | [
[
"Rama",
"S. Kalyana",
""
]
] | The dynamics of a (3 + 1) dimensional homogeneous anisotropic universe is modified by Loop Quantum Cosmology and, consequently, it has generically a big bounce in the past instead of a big-bang singularity. This modified dynamics can be well described by effective equations of motion. We generalise these effective equa... |
1401.3416 | John Baez | John C. Baez and Jamie Vicary | Wormholes and Entanglement | 12 pages | Classical and Quantum Gravity, Vol. 31 No. 21 (2014), 214007 | 10.1088/0264-9381/31/21/214007 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Maldacena and Susskind have proposed a correspondence between wormholes and
entanglement, dubbed ER=EPR. We study this in the context of 3d topological
quantum field theory, where we show that the formation of a wormhole is the
same process as creating a particle-antiparticle pair. A key feature of the
ER=EPR proposa... | [
{
"created": "Wed, 15 Jan 2014 02:57:05 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Feb 2014 18:54:03 GMT",
"version": "v2"
}
] | 2017-08-22 | [
[
"Baez",
"John C.",
""
],
[
"Vicary",
"Jamie",
""
]
] | Maldacena and Susskind have proposed a correspondence between wormholes and entanglement, dubbed ER=EPR. We study this in the context of 3d topological quantum field theory, where we show that the formation of a wormhole is the same process as creating a particle-antiparticle pair. A key feature of the ER=EPR proposal ... |
1505.05975 | Quentin G. Bailey | Quentin G. Bailey | What do we know about Lorentz Symmetry? | 8 pages, presented at the 50th Rencontres de Moriond, "Gravitation:
100 years after GR" | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Precision tests of Lorentz symmetry have become increasingly of interest to
the broader gravitational and high-energy physics communities. In this talk,
recent work on violations of local Lorentz invariance in gravity is discussed,
including recent analysis constraining Lorentz violation in a variety of
gravitational... | [
{
"created": "Fri, 22 May 2015 07:53:45 GMT",
"version": "v1"
}
] | 2015-05-25 | [
[
"Bailey",
"Quentin G.",
""
]
] | Precision tests of Lorentz symmetry have become increasingly of interest to the broader gravitational and high-energy physics communities. In this talk, recent work on violations of local Lorentz invariance in gravity is discussed, including recent analysis constraining Lorentz violation in a variety of gravitational t... |
1207.0993 | Jiliang Jing | Changqing Liu, Songbai Chen, and Jiliang Jing | Rotating non-Kerr black hole and energy extraction | 16 pages, 5 figures, and 2 tables | The Astrophysical Journal 751, (2012) 148 | 10.1088/0004-637X/751/2/148 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The properties of the ergosphere and energy extraction by Penrose process in
a rotating non-Kerr black hole are investigated. It is shown that the
ergosphere is sensitive to the deformation parameter $\epsilon$ and the shape
of the ergosphere becomes thick with increase of the parameter $\epsilon$. It
is of interest ... | [
{
"created": "Wed, 4 Jul 2012 14:23:42 GMT",
"version": "v1"
}
] | 2012-07-05 | [
[
"Liu",
"Changqing",
""
],
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | The properties of the ergosphere and energy extraction by Penrose process in a rotating non-Kerr black hole are investigated. It is shown that the ergosphere is sensitive to the deformation parameter $\epsilon$ and the shape of the ergosphere becomes thick with increase of the parameter $\epsilon$. It is of interest to... |
2207.14002 | Alessandro Nagar | Alessandro Nagar, and Simone Albanesi | Towards a gravitational self force-informed effective-one-body waveform
model for nonprecessing, eccentric, large-mass-ratio inspirals | 11 pages, 8 figures. Submitted to Phys. Rev. D | null | 10.1103/PhysRevD.106.064049 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Building upon several recent advances in the development of
effective-one-body models for spin-aligned eccentric binaries with individual
masses $(m_1,m_2)$ we introduce a new EOB waveform model that aims at
describing inspiralling binaries in the large mass-ratio regime, $m_1\gg m_2$.
The model exploits the current ... | [
{
"created": "Thu, 28 Jul 2022 10:50:07 GMT",
"version": "v1"
}
] | 2022-10-12 | [
[
"Nagar",
"Alessandro",
""
],
[
"Albanesi",
"Simone",
""
]
] | Building upon several recent advances in the development of effective-one-body models for spin-aligned eccentric binaries with individual masses $(m_1,m_2)$ we introduce a new EOB waveform model that aims at describing inspiralling binaries in the large mass-ratio regime, $m_1\gg m_2$. The model exploits the current st... |
2109.11968 | Daniele Gregoris | Daniele Gregoris, Yen Chin Ong | Understanding Gravitational Entropy of Black Holes: A New Proposal via
Curvature Invariants | Matches published version | Phys. Rev. D 105, 104017 (2022) | 10.1103/PhysRevD.105.104017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Partly motivated by the arrow of time problem in cosmology and the Weyl
curvature hypothesis formulated by Roger Penrose, previous works in the
literature have proposed - among other possibilities - the square of the Weyl
curvature, as being the underlying entropy density function of black hole
entropy, but the propo... | [
{
"created": "Fri, 24 Sep 2021 13:55:24 GMT",
"version": "v1"
},
{
"created": "Wed, 11 May 2022 16:44:44 GMT",
"version": "v2"
}
] | 2022-05-12 | [
[
"Gregoris",
"Daniele",
""
],
[
"Ong",
"Yen Chin",
""
]
] | Partly motivated by the arrow of time problem in cosmology and the Weyl curvature hypothesis formulated by Roger Penrose, previous works in the literature have proposed - among other possibilities - the square of the Weyl curvature, as being the underlying entropy density function of black hole entropy, but the proposa... |
1301.5754 | Pierre-Henry Lambert | Glenn Barnich and Pierre-Henry Lambert | Asymptotic symmetries at null infinity and local conformal properties of
spin coefficients | 6 pages latex file, conference proceedings | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the symmetry algebra of asymptotically flat four dimensional
spacetimes at null infinity in the sense of Newman and Unti is isomorphic to
the direct sum of the abelian algebra of infinitesimal conformal rescalings
with bms4. We then work out the local conformal properties of the relevant
Newman-Penrose c... | [
{
"created": "Thu, 24 Jan 2013 11:16:44 GMT",
"version": "v1"
}
] | 2013-01-30 | [
[
"Barnich",
"Glenn",
""
],
[
"Lambert",
"Pierre-Henry",
""
]
] | We show that the symmetry algebra of asymptotically flat four dimensional spacetimes at null infinity in the sense of Newman and Unti is isomorphic to the direct sum of the abelian algebra of infinitesimal conformal rescalings with bms4. We then work out the local conformal properties of the relevant Newman-Penrose coe... |
gr-qc/0009014 | Shinji Mukohyama | Shinji Mukohyama and Werner Israel | Moving-mirror entropy | Latex, 7 pages | Phys.Rev.D62:121501,2000 | 10.1103/PhysRevD.62.121501 | null | gr-qc hep-th | null | We consider a quantized scalar field in a two-dimensional Minkowski spacetime
with a moving mirror and propose a definition of moving-mirror entropy
associated with temporarily inaccessible information about the future.
| [
{
"created": "Tue, 5 Sep 2000 21:35:16 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Mukohyama",
"Shinji",
""
],
[
"Israel",
"Werner",
""
]
] | We consider a quantized scalar field in a two-dimensional Minkowski spacetime with a moving mirror and propose a definition of moving-mirror entropy associated with temporarily inaccessible information about the future. |
2105.07295 | Slava G. Turyshev | Slava G. Turyshev, Viktor T. Toth | Wave-optical study of the Einstein cross formed by a quadrupole
gravitational lens | 23 pages, 10 figures | Phys. Rev. D 104, 124033 (2021) | 10.1103/PhysRevD.104.124033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study imaging of point sources with a quadrupole gravitational lens while
focusing on the formation and evolution of the Einstein cross formed on the
image sensor of an imaging telescope. We use a new type of a diffraction
integral that we developed to study generic, opaque, weakly aspherical
gravitational lenses.... | [
{
"created": "Sat, 15 May 2021 21:03:00 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Nov 2021 03:48:45 GMT",
"version": "v2"
}
] | 2021-12-14 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Toth",
"Viktor T.",
""
]
] | We study imaging of point sources with a quadrupole gravitational lens while focusing on the formation and evolution of the Einstein cross formed on the image sensor of an imaging telescope. We use a new type of a diffraction integral that we developed to study generic, opaque, weakly aspherical gravitational lenses. T... |
0804.0213 | Tomislav Prokopec | Christiaan Mantz and Tomislav Prokopec (Utrecht University) | Hermitian Gravity and Cosmology | 23 pages, 7 eps figures | null | null | ITP-UU-07/66, SPIN-07/52 | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In an attempt to generalize general relativity, we propose a new Hermitian
theory of gravity. Space-time is generalized to space-time-momentum-energy and
both the principles of general covariance and equivalence are extended. The
theory is endowed with a Hermitian metric on a complex manifold. The Hermitian
metric co... | [
{
"created": "Tue, 1 Apr 2008 19:59:53 GMT",
"version": "v1"
}
] | 2008-05-30 | [
[
"Mantz",
"Christiaan",
"",
"Utrecht University"
],
[
"Prokopec",
"Tomislav",
"",
"Utrecht University"
]
] | In an attempt to generalize general relativity, we propose a new Hermitian theory of gravity. Space-time is generalized to space-time-momentum-energy and both the principles of general covariance and equivalence are extended. The theory is endowed with a Hermitian metric on a complex manifold. The Hermitian metric cont... |
gr-qc/9309011 | Centro De Estudios Cientificos De Santia | Maximo Banados | Black Holes in Einstein-Lovelock Gravity | 7 pages, RevTex (3.0) | null | null | null | gr-qc hep-th | null | Static, spherically symmetric solutions of the field equations for a
particular dimensional continuation of general relativity with negative
cosmological constant are found. In even dimensions the solution has many
similarities with the \Sch\ metric. In odd dimensions, the equations of motion
are explicitly anti de-S... | [
{
"created": "Mon, 13 Sep 1993 23:18:52 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Sep 1993 02:53:31 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Banados",
"Maximo",
""
]
] | Static, spherically symmetric solutions of the field equations for a particular dimensional continuation of general relativity with negative cosmological constant are found. In even dimensions the solution has many similarities with the \Sch\ metric. In odd dimensions, the equations of motion are explicitly anti de-Sit... |
gr-qc/9905021 | M. Meyer | S. Deser, J.S. Franklin and D. Seminara | Graviton-Graviton Scattering, Bel-Robinson and Energy (Pseudo)-Tensors | 7 pages | Class.Quant.Grav.16:2815-2821,1999 | 10.1088/0264-9381/16/9/301 | BRX TH-450; LPTENS-99/14 | gr-qc hep-th | null | Motivated by recent work involving the graviton-graviton tree scattering
amplitude, and its twin descriptions as the square of the Bel-Robinson tensor,
$B_{\m\n\a\b}$, and as the "current-current interaction" square of
gravitational energy pseudo-tensors $t_{\a\b}$,we find an exact tensor-square
root equality $B_{\mn... | [
{
"created": "Thu, 6 May 1999 17:55:43 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Deser",
"S.",
""
],
[
"Franklin",
"J. S.",
""
],
[
"Seminara",
"D.",
""
]
] | Motivated by recent work involving the graviton-graviton tree scattering amplitude, and its twin descriptions as the square of the Bel-Robinson tensor, $B_{\m\n\a\b}$, and as the "current-current interaction" square of gravitational energy pseudo-tensors $t_{\a\b}$,we find an exact tensor-square root equality $B_{\mn\a... |
gr-qc/9907068 | Christopher Beetle | Abhay Ashtekar, Christopher Beetle, Stephen Fairhurst | Mechanics of Isolated Horizons | 56 pages, LaTeX2e, 7 eps figures Revised version with an improved
treatment of the phase space | Class.Quant.Grav. 17 (2000) 253-298 | 10.1088/0264-9381/17/2/301 | null | gr-qc | null | A set of boundary conditions defining an undistorted, non-rotating isolated
horizon are specified in general relativity. A space-time representing a black
hole which is itself in equilibrium but whose exterior contains radiation
admits such a horizon. However, the definition is applicable in a more general
context, s... | [
{
"created": "Thu, 22 Jul 1999 02:15:09 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Nov 1999 20:22:26 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Beetle",
"Christopher",
""
],
[
"Fairhurst",
"Stephen",
""
]
] | A set of boundary conditions defining an undistorted, non-rotating isolated horizon are specified in general relativity. A space-time representing a black hole which is itself in equilibrium but whose exterior contains radiation admits such a horizon. However, the definition is applicable in a more general context, suc... |
1909.07280 | Milko Estrada | Milko Estrada and Rodrigo Aros | Thermodynamic extended phase space and $P-V$ criticality of black holes
at Pure Lovelock gravity | null | Eur. Phys. J. C 80, 395 (2020) | 10.1140/epjc/s10052-020-7954-2 | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | In this work the \textit{chemistry} of asymptotically AdS black hole, charged
and uncharged, solutions of Pure Lovelock gravity is discussed. For this the
mass parameter of black holes is identified with the enthalpy of the system
together with the promotion of the cosmological constant to a thermodynamics
variable p... | [
{
"created": "Mon, 16 Sep 2019 15:35:27 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Oct 2019 15:18:07 GMT",
"version": "v2"
},
{
"created": "Thu, 31 Oct 2019 01:30:46 GMT",
"version": "v3"
}
] | 2020-05-12 | [
[
"Estrada",
"Milko",
""
],
[
"Aros",
"Rodrigo",
""
]
] | In this work the \textit{chemistry} of asymptotically AdS black hole, charged and uncharged, solutions of Pure Lovelock gravity is discussed. For this the mass parameter of black holes is identified with the enthalpy of the system together with the promotion of the cosmological constant to a thermodynamics variable pro... |
1411.7302 | Kazem Rezazadeh | K. Rezazadeh, K. Karami and P. Karimi | Intermediate inflation from a non-canonical scalar field | 23 pages, 6 figures | JCAP 09 (2015) 053 | 10.1088/1475-7516/2015/09/053 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the intermediate inflation in a non-canonical scalar field framework
with a power-like Lagrangian. We show that in contrast with the standard
canonical intermediate inflation, our non-canonical model is compatible with
the observational results of Planck 2015. Also, we estimate the equilateral
non-Gaussianit... | [
{
"created": "Mon, 24 Nov 2014 18:10:47 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Dec 2014 06:37:52 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Mar 2015 06:58:41 GMT",
"version": "v3"
},
{
"created": "Wed, 23 Sep 2015 13:37:14 GMT",
"version": "v4"
}
] | 2015-09-24 | [
[
"Rezazadeh",
"K.",
""
],
[
"Karami",
"K.",
""
],
[
"Karimi",
"P.",
""
]
] | We study the intermediate inflation in a non-canonical scalar field framework with a power-like Lagrangian. We show that in contrast with the standard canonical intermediate inflation, our non-canonical model is compatible with the observational results of Planck 2015. Also, we estimate the equilateral non-Gaussianity ... |
gr-qc/9903095 | Andrew P. Billyard | Andrew P. Billyard (Dalhousie University), Alan A. Coley (Dalhousie
University), James E. Lidsey (University of Sussex) | Qualitative Analysis of String Cosmologies | 13 pages, 4 postscript figures, accepted to Physical Review D | Phys.Rev. D59 (1999) 123505 | 10.1103/PhysRevD.59.123505 | DH-99-03 | gr-qc astro-ph hep-th | null | A qualitative analysis is presented for spatially flat, isotropic and
homogeneous cosmologies derived from the string effective action when the
combined effects of a dilaton, modulus, two-form potential and central charge
deficit are included. The latter has significant effects on the qualitative
dynamics. The analys... | [
{
"created": "Fri, 26 Mar 1999 00:43:46 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Billyard",
"Andrew P.",
"",
"Dalhousie University"
],
[
"Coley",
"Alan A.",
"",
"Dalhousie\n University"
],
[
"Lidsey",
"James E.",
"",
"University of Sussex"
]
] | A qualitative analysis is presented for spatially flat, isotropic and homogeneous cosmologies derived from the string effective action when the combined effects of a dilaton, modulus, two-form potential and central charge deficit are included. The latter has significant effects on the qualitative dynamics. The analysis... |
1012.3084 | Thomas Buchert | Thomas Buchert | Towards physical cosmology: geometrical interpretation of Dark Energy,
Dark Matter and Inflation without fundamental sources | 14 pages, 6 figures; presented at the International Conference on Two
Cosmological Models, Universidad Iberoamericana Ciudad de M\'exico -
Department of Physics and Mathematics, November 19 (2010) | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We outline the key-steps towards the construction of a physical, fully
relativistic cosmology, in which we aim to trace Dark Energy and Dark Matter
back to physical properties of space. The influence of inhomogeneities on the
effective evolution history of the Universe is encoded in backreaction terms
and expressed t... | [
{
"created": "Tue, 14 Dec 2010 16:38:56 GMT",
"version": "v1"
}
] | 2010-12-15 | [
[
"Buchert",
"Thomas",
""
]
] | We outline the key-steps towards the construction of a physical, fully relativistic cosmology, in which we aim to trace Dark Energy and Dark Matter back to physical properties of space. The influence of inhomogeneities on the effective evolution history of the Universe is encoded in backreaction terms and expressed thr... |
1809.03346 | Bernard Jancewicz | Bernard Jancewicz | "Plane" electromagnetic wave in spatially flat Friedman universe | 19 pages, comments welcome | null | 10.1063/1.5058731 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The electromagnetic theory is, to a large extend, metric independent. Before
the metric is introduced, it is called premetric electrodynamics. Metric enters
the constitutive relation. We consider this relation for the Friedman model of
an expanding Universe and find that the magnitudes of the field quantities
depend ... | [
{
"created": "Fri, 7 Sep 2018 12:02:29 GMT",
"version": "v1"
}
] | 2019-06-26 | [
[
"Jancewicz",
"Bernard",
""
]
] | The electromagnetic theory is, to a large extend, metric independent. Before the metric is introduced, it is called premetric electrodynamics. Metric enters the constitutive relation. We consider this relation for the Friedman model of an expanding Universe and find that the magnitudes of the field quantities depend on... |
2004.09339 | Fu-Wen Shu | Fu-Wen Shu | Vacua in novel 4D Einstein-Gauss-Bonnet Gravity: pathology and
instability? | 6 pages, 1 figure | null | 10.1016/j.physletb.2020.135907 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show an inconsistence of the novel 4D Einstein-Gauss-Bonnet gravity by
considering a quantum tunneling process of vacua. Using standard semi-classical
techniques, we analytically study the vacuum decay rate for all allowed cases
in the parameter space. It turns out, without exception, that the theory either
encoun... | [
{
"created": "Mon, 20 Apr 2020 14:37:51 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Apr 2020 02:49:58 GMT",
"version": "v2"
},
{
"created": "Wed, 22 Apr 2020 06:27:35 GMT",
"version": "v3"
}
] | 2020-11-11 | [
[
"Shu",
"Fu-Wen",
""
]
] | We show an inconsistence of the novel 4D Einstein-Gauss-Bonnet gravity by considering a quantum tunneling process of vacua. Using standard semi-classical techniques, we analytically study the vacuum decay rate for all allowed cases in the parameter space. It turns out, without exception, that the theory either encounte... |
1904.04831 | Leo Stein | Michael Boyle, Daniel Hemberger, Dante A.B. Iozzo, Geoffrey Lovelace,
Serguei Ossokine, Harald P. Pfeiffer, Mark A. Scheel, Leo C. Stein, Charles
J. Woodford, Aaron B. Zimmerman, Nousha Afshari, Kevin Barkett, Jonathan
Blackman, Katerina Chatziioannou, Tony Chu, Nicholas Demos, Nils Deppe, Scott
E. Field, Nils ... | The SXS Collaboration catalog of binary black hole simulations | 33+18 pages, 13 figures, 4 tables, 2,018 binaries. Catalog metadata
in ancillary JSON file. v2: Matches version accepted by CQG. Catalog
available at https://www.black-holes.org/waveforms | Class. Quantum Grav. 36, 195006 (2019) | 10.1088/1361-6382/ab34e2 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Accurate models of gravitational waves from merging black holes are necessary
for detectors to observe as many events as possible while extracting the
maximum science. Near the time of merger, the gravitational waves from merging
black holes can be computed only using numerical relativity. In this paper, we
present a... | [
{
"created": "Tue, 9 Apr 2019 18:00:00 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Sep 2019 16:17:33 GMT",
"version": "v2"
}
] | 2019-09-13 | [
[
"Boyle",
"Michael",
""
],
[
"Hemberger",
"Daniel",
""
],
[
"Iozzo",
"Dante A. B.",
""
],
[
"Lovelace",
"Geoffrey",
""
],
[
"Ossokine",
"Serguei",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Scheel",
"Mark A.",
... | Accurate models of gravitational waves from merging black holes are necessary for detectors to observe as many events as possible while extracting the maximum science. Near the time of merger, the gravitational waves from merging black holes can be computed only using numerical relativity. In this paper, we present a m... |
gr-qc/0608062 | Scott A. Hughes | Ryan N. Lang and Scott A. Hughes | Measuring coalescing massive binary black holes with gravitational
waves: The impact of spin-induced precession | 22 pages, 10 figures. Corrects small typo in equations; results
unaffected | Phys.Rev.D74:122001,2006; Erratum-ibid.D75:089902,2007;
Erratum-ibid.D77:109901,2008 | 10.1103/PhysRevD.74.122001 10.1103/PhysRevD.75.089902
10.1103/PhysRevD.77.109901 | null | gr-qc astro-ph | null | The coalescence of massive black holes generates gravitational waves (GWs)
that will be measurable by space-based detectors such as LISA to large
redshifts. The spins of a binary's black holes have an important impact on its
waveform. Specifically, geodetic and gravitomagnetic effects cause the spins to
precess; this... | [
{
"created": "Fri, 11 Aug 2006 17:11:14 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Oct 2006 21:45:38 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Mar 2007 22:49:48 GMT",
"version": "v3"
},
{
"created": "Wed, 2 May 2007 21:16:15 GMT",
"version": "v4"
},
{
"cre... | 2014-11-17 | [
[
"Lang",
"Ryan N.",
""
],
[
"Hughes",
"Scott A.",
""
]
] | The coalescence of massive black holes generates gravitational waves (GWs) that will be measurable by space-based detectors such as LISA to large redshifts. The spins of a binary's black holes have an important impact on its waveform. Specifically, geodetic and gravitomagnetic effects cause the spins to precess; this p... |
2311.10930 | Taotao Sui | Tao-Tao Sui, Qi-Ming Fu, Wen-Di Guo | The shadows of accelerating Kerr-Newman black hole and constraints from
M87* | 9 pages, 16figures | null | 10.1016/j.physletb.2023.138135 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we study the influence of the parameters for the accelerating
Kerr-Newman black hole on the shadows and the constraints, extensively. We find
that the rotating parameter $a$, the charge parameter $e$, and the inclination
angle $\theta_0$ affect the shadow qualitatively similar to that of Kerr-Newman
bl... | [
{
"created": "Sat, 18 Nov 2023 01:55:18 GMT",
"version": "v1"
}
] | 2023-11-21 | [
[
"Sui",
"Tao-Tao",
""
],
[
"Fu",
"Qi-Ming",
""
],
[
"Guo",
"Wen-Di",
""
]
] | In this paper, we study the influence of the parameters for the accelerating Kerr-Newman black hole on the shadows and the constraints, extensively. We find that the rotating parameter $a$, the charge parameter $e$, and the inclination angle $\theta_0$ affect the shadow qualitatively similar to that of Kerr-Newman blac... |
1711.11384 | Gonzalo Quiroga | G. D. Quiroga | Sources of gravitational waves in asymptotically flat Einstein-Maxwell
spacetime | null | null | 10.1007/s10714-016-2181-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, the dynamic of isolated systems in general relativity is
described when gravitational radiation and electromagnetic fields are present.
In this construction, the asymptotic fields received at null infinity together
with the regularized null cone cuts equation, and the center of mass of an
asymptotically... | [
{
"created": "Thu, 30 Nov 2017 13:33:51 GMT",
"version": "v1"
}
] | 2017-12-01 | [
[
"Quiroga",
"G. D.",
""
]
] | In this work, the dynamic of isolated systems in general relativity is described when gravitational radiation and electromagnetic fields are present. In this construction, the asymptotic fields received at null infinity together with the regularized null cone cuts equation, and the center of mass of an asymptotically f... |
2309.15958 | Lavinia Heisenberg | Lavinia Heisenberg | Review on $f(Q)$ Gravity | 106 pages, 13 figures, 2 tables. Comments are welcome! Please write
us if we forgot to cite your important works. Apologies! | null | null | null | gr-qc astro-ph.CO astro-ph.GA hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Recent years have witnessed a rise in interest in the geometrical trinity of
General Relativity and its extensions. This interest has been fuelled by novel
insights into the nature of gravity, the possibility to address computational
and conceptual questions -- such as the determination of black hole entropy or
the d... | [
{
"created": "Wed, 27 Sep 2023 19:16:19 GMT",
"version": "v1"
}
] | 2023-09-29 | [
[
"Heisenberg",
"Lavinia",
""
]
] | Recent years have witnessed a rise in interest in the geometrical trinity of General Relativity and its extensions. This interest has been fuelled by novel insights into the nature of gravity, the possibility to address computational and conceptual questions -- such as the determination of black hole entropy or the def... |
2007.00193 | Gabriel Abell\'an | G. Abellan, E. Fuenmayor, E. Contreras, L. Herrera | The general relativistic double polytrope for anisotropic matter | 8 pages, 7 figures | Physics of the Dark Universe. Volume 30, 100632 (2020) | 10.1016/j.dark.2020.100632 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general formalism recently proposed to study Newtonian polytropes for
anisotropic fluids is here extended to the relativistic regime. Thus, it is
assumed that a polytropic equation of state is satisfied by, both, the radial
and the tangential pressures of the fluid. Doing so the generalized Lane--Emden
equations ar... | [
{
"created": "Wed, 1 Jul 2020 02:57:41 GMT",
"version": "v1"
}
] | 2020-07-02 | [
[
"Abellan",
"G.",
""
],
[
"Fuenmayor",
"E.",
""
],
[
"Contreras",
"E.",
""
],
[
"Herrera",
"L.",
""
]
] | A general formalism recently proposed to study Newtonian polytropes for anisotropic fluids is here extended to the relativistic regime. Thus, it is assumed that a polytropic equation of state is satisfied by, both, the radial and the tangential pressures of the fluid. Doing so the generalized Lane--Emden equations are ... |
1505.04133 | Robert Bock | Robert D. Bock | Gauge Theory of the Gravitational-Electromagnetic Field | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a gauge theory of the combined gravitational-electromagnetic field
by expanding the Poincar\'e group to include clock synchronization
transformations. We show that the electromagnetic field can be interpreted as a
local gauge theory of the synchrony group. According to this interpretation,
the electromagne... | [
{
"created": "Fri, 15 May 2015 17:29:45 GMT",
"version": "v1"
},
{
"created": "Tue, 26 May 2015 17:33:26 GMT",
"version": "v2"
}
] | 2015-05-27 | [
[
"Bock",
"Robert D.",
""
]
] | We develop a gauge theory of the combined gravitational-electromagnetic field by expanding the Poincar\'e group to include clock synchronization transformations. We show that the electromagnetic field can be interpreted as a local gauge theory of the synchrony group. According to this interpretation, the electromagneti... |
0805.2754 | Sergio Dain | Gast\'on A. Avila and Sergio Dain | The Yamabe invariant for axially symmetric two Kerr black holes initial
data | 14 pages, 2 figures | Class.Quant.Grav.25:225002,2008 | 10.1088/0264-9381/25/22/225002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An explicit 3-dimensional Riemannian metric is constructed which can be
interpreted as the (conformal) sum of two Kerr black holes with aligned angular
momentum. When the separation distance between them is large we prove that this
metric has positive Ricci scalar and hence positive Yamabe invariant. This
metric can ... | [
{
"created": "Sun, 18 May 2008 20:28:04 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Avila",
"Gastón A.",
""
],
[
"Dain",
"Sergio",
""
]
] | An explicit 3-dimensional Riemannian metric is constructed which can be interpreted as the (conformal) sum of two Kerr black holes with aligned angular momentum. When the separation distance between them is large we prove that this metric has positive Ricci scalar and hence positive Yamabe invariant. This metric can be... |
gr-qc/0006072 | Sharon Jensen | Erast B. Gliner | Relativistic Quantum Non-Locality | LaTex, 8 pages | null | null | null | gr-qc | null | The controversy between relativistic causality and quantum non-locality can
be resolved by establishing the general relativistic background of quantum
non-locality.
| [
{
"created": "Tue, 20 Jun 2000 20:53:10 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gliner",
"Erast B.",
""
]
] | The controversy between relativistic causality and quantum non-locality can be resolved by establishing the general relativistic background of quantum non-locality. |
gr-qc/9607070 | null | B. L. Hu | General Relativity as Geometro-Hydrodynamics | Latex 18 pages. Expanded version of an invited talk given at the
Second Sakharov International Symposium, Lebedev Physical Institute, Moscow,
May 20-24, 1996 | null | null | University of Maryland preprint 96-114 | gr-qc | null | In the spirit of Sakharov's `metric elasticity' proposal, we draw a loose
analogy between general relativity and the hydrodynamic state of a quantum gas.
In the `top-down' approach, we examine the various conditions which underlie
the transition from some candidate theory of quantum gravity to general
relativity. Our... | [
{
"created": "Mon, 29 Jul 1996 00:51:53 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Hu",
"B. L.",
""
]
] | In the spirit of Sakharov's `metric elasticity' proposal, we draw a loose analogy between general relativity and the hydrodynamic state of a quantum gas. In the `top-down' approach, we examine the various conditions which underlie the transition from some candidate theory of quantum gravity to general relativity. Our e... |
1406.6913 | Alessandro Nagar | Thibault Damour and Alessandro Nagar | A new effective-one-body description of coalescing nonprecessing
spinning black-hole binaries | 13 pages, 2 figures. Submitted to Phys. Rev. D | null | 10.1103/PhysRevD.90.044018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new, tunable effective-one-body (EOB) model of the motion and
radiation of coalescing black hole binaries with arbitrary mass ratio and
aligned spins. The most novel feature of our formalism is the introduction, and
systematic use, of the (gauge-invariant) concept of {\it centrifugal radius}
$r_{c}$. In ... | [
{
"created": "Thu, 26 Jun 2014 15:16:01 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Damour",
"Thibault",
""
],
[
"Nagar",
"Alessandro",
""
]
] | We present a new, tunable effective-one-body (EOB) model of the motion and radiation of coalescing black hole binaries with arbitrary mass ratio and aligned spins. The most novel feature of our formalism is the introduction, and systematic use, of the (gauge-invariant) concept of {\it centrifugal radius} $r_{c}$. In th... |
1205.5656 | Parthapratim Pradhan | Parthapratim Pradhan | Stability analysis and quasinormal modes of Reissner Nordstr{\o}m
Space-time via Lyapunov exponent | Accepted in Pramana, 07/09/2015 | Pramana, June 2016, 87:5 | 10.1007/s12043-016-1214-x | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explicitly derive the proper time $(\tau)$ principal Lyapunov exponent
($\lambda_{p}$) and coordinate time ($t$) principal Lyapunov exponent
($\lambda_{c}$) for Reissner Nordstr{\o}m (RN) black hole (BH) . We also
compute their ratio. For RN space-time, it is shown that the ratio is
$\frac{\lambda_{p}}{\lambda_{c}... | [
{
"created": "Fri, 25 May 2012 10:41:52 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Aug 2014 07:57:47 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Jun 2016 06:54:51 GMT",
"version": "v3"
}
] | 2016-06-16 | [
[
"Pradhan",
"Parthapratim",
""
]
] | We explicitly derive the proper time $(\tau)$ principal Lyapunov exponent ($\lambda_{p}$) and coordinate time ($t$) principal Lyapunov exponent ($\lambda_{c}$) for Reissner Nordstr{\o}m (RN) black hole (BH) . We also compute their ratio. For RN space-time, it is shown that the ratio is $\frac{\lambda_{p}}{\lambda_{c}}=... |
2008.08613 | Bobur Turimov | Bobur Turimov, Javlon Rayimbayev, Ahmadjon Abdujabbarov, Bobomurat
Ahmedov and Zden\v{e}k Stuchl\'ik | Test particle motion around black hole in Einstein-Maxwell-scalar theory | 14 pages, 8 figures, Published in Physical Review D | null | 10.1103/PhysRevD.102.064052 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we explore the test particle motion around a black hole in
Einstein-Maxwell-scalar (EMS) theory using three different black hole solutions
within this theory. We have first analyzed the spacetime curvature structure of
these solutions and shown the existence of two singularities and the first one
is at... | [
{
"created": "Wed, 19 Aug 2020 18:15:24 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Sep 2020 16:04:51 GMT",
"version": "v2"
}
] | 2020-10-07 | [
[
"Turimov",
"Bobur",
""
],
[
"Rayimbayev",
"Javlon",
""
],
[
"Abdujabbarov",
"Ahmadjon",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Stuchlík",
"Zdeněk",
""
]
] | In this paper, we explore the test particle motion around a black hole in Einstein-Maxwell-scalar (EMS) theory using three different black hole solutions within this theory. We have first analyzed the spacetime curvature structure of these solutions and shown the existence of two singularities and the first one is at t... |
1811.06683 | James Bardeen | James M. Bardeen | Models for the nonsingular transition of an evaporating black hole into
a white hole | 23 pages, 4 figures. V2 completes the mode metricl, explicitly
including the Hawking radiation. Discussions of quantum energy conditions,
the emission of negative energy, and the stability of the white hole horizon
have been significantly expanded | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There have been a number of suggestions that the r = 0 singularity of a
spherically symmetric (uncharged) evaporating black hole can be circumvented by
a quantum transition to a white hole, which eventually releases all trapped
quantum information, consistent with overall unitary evolution of the quantum
fields. Some... | [
{
"created": "Fri, 16 Nov 2018 05:46:13 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Apr 2019 22:05:50 GMT",
"version": "v2"
}
] | 2019-04-08 | [
[
"Bardeen",
"James M.",
""
]
] | There have been a number of suggestions that the r = 0 singularity of a spherically symmetric (uncharged) evaporating black hole can be circumvented by a quantum transition to a white hole, which eventually releases all trapped quantum information, consistent with overall unitary evolution of the quantum fields. Some o... |
2312.14241 | Shahar Hod | Shahar Hod | Compact stars: To cross or go around? That is the question | 10 pages | Physics Letters B 848, 138347 (2024) | null | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | The travel times of light signals between two antipodal points on the surface
of a compact star are calculated for two different trajectories: a straight
line that passes through the center of the star and a semi-circular trajectory
that connects the antipodal points along the surface of the star.
Interestingly, it i... | [
{
"created": "Thu, 21 Dec 2023 19:00:01 GMT",
"version": "v1"
}
] | 2023-12-25 | [
[
"Hod",
"Shahar",
""
]
] | The travel times of light signals between two antipodal points on the surface of a compact star are calculated for two different trajectories: a straight line that passes through the center of the star and a semi-circular trajectory that connects the antipodal points along the surface of the star. Interestingly, it is ... |
0712.2190 | Douglas Shaw | John D. Barrow and Douglas J. Shaw | Some Late-time Asymptotics of General Scalar-Tensor Cosmologies | 14 pages | Class.Quant.Grav.25:085012,2008 | 10.1088/0264-9381/25/8/085012 | null | gr-qc astro-ph | null | We study the asymptotic behaviour of isotropic and homogeneous universes in
general scalar-tensor gravity theories containing a p=-rho vacuum fluid stress
and other sub-dominant matter stresses. It is shown that in order for there to
be approach to a de Sitter spacetime at large 4-volumes the coupling function,
omega... | [
{
"created": "Thu, 13 Dec 2007 16:59:05 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Barrow",
"John D.",
""
],
[
"Shaw",
"Douglas J.",
""
]
] | We study the asymptotic behaviour of isotropic and homogeneous universes in general scalar-tensor gravity theories containing a p=-rho vacuum fluid stress and other sub-dominant matter stresses. It is shown that in order for there to be approach to a de Sitter spacetime at large 4-volumes the coupling function, omega(p... |
1601.04821 | Annalisa Marzuoli | Annalisa Marzuoli and Dario Merzi | Conformal variations and quantum fluctuations in discrete gravity | 11 pages, 3 figures | Int. J. Geom. Meth. Mod. Phys. vol 13 (2016) 1650084 | 10.1142/S0219887816500845 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After an overview of variational principles for discrete gravity, and on the
basis of the approach to conformal transformations in a simplicial PL setting
proposed by Luo and Glickenstein, we present at a heuristic level an improved
scheme for addressing the gravitational (Euclidean) path integral and
geometrodynamic... | [
{
"created": "Tue, 19 Jan 2016 08:50:42 GMT",
"version": "v1"
}
] | 2016-06-17 | [
[
"Marzuoli",
"Annalisa",
""
],
[
"Merzi",
"Dario",
""
]
] | After an overview of variational principles for discrete gravity, and on the basis of the approach to conformal transformations in a simplicial PL setting proposed by Luo and Glickenstein, we present at a heuristic level an improved scheme for addressing the gravitational (Euclidean) path integral and geometrodynamics. |
gr-qc/0602066 | Eran Rosenthal | Eran Rosenthal | Construction of the second-order gravitational perturbations produced by
a compact object | 30 pages | Phys.Rev. D73 (2006) 044034 | 10.1103/PhysRevD.73.044034 | null | gr-qc | null | Accurate calculation of the gradual inspiral motion in an extreme mass-ratio
binary system, in which a compact-object inspirals towards a supermassive
black-hole requires calculation of the interaction between the compact-object
and the gravitational perturbations that it induces. These metric perturbations
satisfy l... | [
{
"created": "Fri, 17 Feb 2006 20:10:24 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Rosenthal",
"Eran",
""
]
] | Accurate calculation of the gradual inspiral motion in an extreme mass-ratio binary system, in which a compact-object inspirals towards a supermassive black-hole requires calculation of the interaction between the compact-object and the gravitational perturbations that it induces. These metric perturbations satisfy lin... |
gr-qc/0011072 | Pia Astone | P. Astone, et al | Search for Periodic Gravitational Wave Sources with the Explorer
Detector | One zipped file (Latex+eps figures). 33 pages, 14 figures. This and
related material also at http://grwav3.roma1.infn.it/ | Phys.Rev.D65:022001,2002 | 10.1103/PhysRevD.65.022001 | null | gr-qc astro-ph | null | We have developped a procedure for the search of periodic signals in the data
of gravitational wave detectors. We report here the analysis of one year of
data from the resonant detector Explorer, searching for pulsars located in the
Galactic Center (GC). No signals with amplitude greater than $\bar{h}=
2.9~10^{-24}$,... | [
{
"created": "Tue, 21 Nov 2000 15:20:52 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Astone",
"P.",
""
]
] | We have developped a procedure for the search of periodic signals in the data of gravitational wave detectors. We report here the analysis of one year of data from the resonant detector Explorer, searching for pulsars located in the Galactic Center (GC). No signals with amplitude greater than $\bar{h}= 2.9~10^{-24}$, i... |
0909.3713 | Xin Li | Xin Li and Zhe Chang | A possible scenario of the Pioneer anomaly in the framework of Finsler
geometry | 10 pages | Phys.Lett.B692:1-3,2010 | 10.1016/j.physletb.2010.07.017 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | The weak field approximation of geodesics in Randers-Finsler space is
investigated. We show that a Finsler structure of Randers space corresponds to
the constant and sunward anomalous acceleration demonstrated by the Pioneer 10
and 11 data. The additional term in the geodesic equation acts as "electric
force", which ... | [
{
"created": "Mon, 21 Sep 2009 08:54:59 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Oct 2010 07:32:36 GMT",
"version": "v2"
}
] | 2010-10-12 | [
[
"Li",
"Xin",
""
],
[
"Chang",
"Zhe",
""
]
] | The weak field approximation of geodesics in Randers-Finsler space is investigated. We show that a Finsler structure of Randers space corresponds to the constant and sunward anomalous acceleration demonstrated by the Pioneer 10 and 11 data. The additional term in the geodesic equation acts as "electric force", which pr... |
2202.07395 | Metin Gurses | Metin Gurses | Integrability of Three Dimensional Gravity Field Equations | A contribution to Tekin Dereli's 70th birthday Fetstschrift
(DERELI-FS-2021) | Journal of Physics. Conference Series, 2191, 012013 (2022) | 10.1088/1742-6596/2191/1/012013 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We show that the tree dimensional Einstein vacuum field equations with
cosmological constant are integrable. Using the $sl(2,R)$ valued soliton
connections we obtain the metric of the spacetime in terms of the dynamical
variables of the integrable nonlinear partial differential equations.
| [
{
"created": "Tue, 15 Feb 2022 13:40:41 GMT",
"version": "v1"
}
] | 2022-02-23 | [
[
"Gurses",
"Metin",
""
]
] | We show that the tree dimensional Einstein vacuum field equations with cosmological constant are integrable. Using the $sl(2,R)$ valued soliton connections we obtain the metric of the spacetime in terms of the dynamical variables of the integrable nonlinear partial differential equations. |
gr-qc/0510015 | T. Padmanabhan | T. Padmanabhan | A new perspective on Gravity and the dynamics of Spacetime | Based on the Essay selected for Honorable Mention in the Gravity
Research Foundation Essay Contest, 2005; to appear in the special issue of
IJMPD | Int.J.Mod.Phys. D14 (2005) 2263-2270 | 10.1142/S0218271805007863 | null | gr-qc astro-ph hep-th | null | The Einstein-Hilbert action has a bulk term and a surface term (which arises
from integrating a four divergence). I show that one can obtain Einstein's
equations from the surface term alone. This leads to: (i) a novel, completely
self contained, perspective on gravity and (ii) a concrete mathematical
framework in whi... | [
{
"created": "Tue, 4 Oct 2005 17:00:02 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jun 2006 17:56:20 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Padmanabhan",
"T.",
""
]
] | The Einstein-Hilbert action has a bulk term and a surface term (which arises from integrating a four divergence). I show that one can obtain Einstein's equations from the surface term alone. This leads to: (i) a novel, completely self contained, perspective on gravity and (ii) a concrete mathematical framework in which... |
gr-qc/0605112 | Daniel M\"uller | Mariana P. Lima and Daniel Muller | Casimir Effect in $E^3$ closed spaces | Version accepted for publication. The most general coupling with
curvature is chosen | Class.Quant.Grav. 24 (2007) 897-914 | 10.1088/0264-9381/24/4/010 | null | gr-qc astro-ph hep-th | null | As it is well known the topology of space is not totally determined by
Einstein's equations. It is considered a massless scalar quantum field in a
static Euclidean space of dimension 3. The expectation value for the energy
density in all compact orientable Euclidean 3-spaces are obtained in this work
as a finite summ... | [
{
"created": "Fri, 19 May 2006 18:16:32 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Aug 2006 15:05:59 GMT",
"version": "v2"
},
{
"created": "Wed, 16 Aug 2006 14:37:05 GMT",
"version": "v3"
},
{
"created": "Sun, 28 Jan 2007 16:12:49 GMT",
"version": "v4"
}
] | 2009-11-11 | [
[
"Lima",
"Mariana P.",
""
],
[
"Muller",
"Daniel",
""
]
] | As it is well known the topology of space is not totally determined by Einstein's equations. It is considered a massless scalar quantum field in a static Euclidean space of dimension 3. The expectation value for the energy density in all compact orientable Euclidean 3-spaces are obtained in this work as a finite summat... |
gr-qc/0312027 | Christian Boehmer | Christian G. Boehmer | Eleven spherically symmetric constant density solutions with
cosmological constant | 19 pages, 5 figures, 1 table, revised bibliography, corrected eqn.
(3.11), typos corrected, two new references | Gen.Rel.Grav. 36 (2004) 1039-1054 | 10.1023/B:GERG.0000018088.69051.3b | null | gr-qc | null | Einstein's field equations with cosmological constant are analysed for a
static, spherically symmetric perfect fluid having constant density. Five new
global solutions are described.
One of these solutions has the Nariai solution joined on as an exterior
field. Another solution describes a decreasing pressure model... | [
{
"created": "Thu, 4 Dec 2003 11:04:59 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Mar 2004 08:22:05 GMT",
"version": "v2"
},
{
"created": "Sat, 4 Feb 2006 18:11:35 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Boehmer",
"Christian G.",
""
]
] | Einstein's field equations with cosmological constant are analysed for a static, spherically symmetric perfect fluid having constant density. Five new global solutions are described. One of these solutions has the Nariai solution joined on as an exterior field. Another solution describes a decreasing pressure model wit... |
gr-qc/0402012 | Ruth Lazkoz | Ruth Lazkoz | Symmetries and assisted inflation in the DGP braneworld model | 13 pages, 1 figure | Phys.Rev. D70 (2004) 064033 | 10.1103/PhysRevD.70.064033 | null | gr-qc hep-th | null | We present here the general transformation that leaves unchanged the form of
the field equations for perfect fluid cosmologies in the DGP braneworld model.
Specifically, a prescription for relating exact solutions with different
equations of state is provided, and the symmetries found can be used as
algorithms for ge... | [
{
"created": "Tue, 3 Feb 2004 10:29:07 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Oct 2004 06:43:03 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Lazkoz",
"Ruth",
""
]
] | We present here the general transformation that leaves unchanged the form of the field equations for perfect fluid cosmologies in the DGP braneworld model. Specifically, a prescription for relating exact solutions with different equations of state is provided, and the symmetries found can be used as algorithms for gene... |
1301.2921 | Diego Rubiera-Garcia | Jesus Martinez-Asencio, Gonzalo J. Olmo and D. Rubiera-Garcia | Black holes in extended gravity theories in Palatini formalism | 4 pages, contribution to the "Spanish Relativity Meeting in Portugal
2012 (Progress in Mathematical Relativity, Gravitation and Cosmology)",
Springer Proceedings in Mathematics (to appear) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider several physical scenarios where black holes within classical
gravity theories including $R^2$ and Ricci-squared corrections and formulated
\`a la Palatini can be analytically studied.
| [
{
"created": "Mon, 14 Jan 2013 10:56:12 GMT",
"version": "v1"
}
] | 2013-01-15 | [
[
"Martinez-Asencio",
"Jesus",
""
],
[
"Olmo",
"Gonzalo J.",
""
],
[
"Rubiera-Garcia",
"D.",
""
]
] | We consider several physical scenarios where black holes within classical gravity theories including $R^2$ and Ricci-squared corrections and formulated \`a la Palatini can be analytically studied. |
1912.04790 | Mauricio Bellini | Jaime Mendoza Hern\'andez, Mauricio Bellini, Claudia Moreno | Space-time waves from a collapse with a time dependent cosmological
parameter | 11 pages, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the emission of space-time waves produced by back-reaction effects
during a collapse of a spherically symmetric universe with a time dependent
cosmological parameter, which is driven by a scalar field. As in a previous
work the final state avoids the final singularity due to the fact the co-moving
relativist... | [
{
"created": "Tue, 10 Dec 2019 16:02:00 GMT",
"version": "v1"
}
] | 2019-12-11 | [
[
"Hernández",
"Jaime Mendoza",
""
],
[
"Bellini",
"Mauricio",
""
],
[
"Moreno",
"Claudia",
""
]
] | We study the emission of space-time waves produced by back-reaction effects during a collapse of a spherically symmetric universe with a time dependent cosmological parameter, which is driven by a scalar field. As in a previous work the final state avoids the final singularity due to the fact the co-moving relativistic... |
1606.02443 | Koji Yamaguchi | Masahiro Hotta, Jose Trevison and Koji Yamaguchi | Gravitational Memory Charges of Supertranslation and Superrotation on
Rindler Horizons | 36 pages, 9 figures, including minor corrections; published in PRD | Phys. Rev. D 94, 083001 (2016) | 10.1103/PhysRevD.94.083001 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a Rindler-type coordinate system spanned in a region outside of a black
hole horizon, we have nonvanishing classical holographic charges as soft hairs
on the horizon for stationary black holes. Taking a large black hole mass
limit, the spacetimes with the charges are described by asymptotic Rindler
metrics. We con... | [
{
"created": "Wed, 8 Jun 2016 08:13:52 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Sep 2016 04:44:44 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Oct 2016 08:49:18 GMT",
"version": "v3"
}
] | 2016-10-12 | [
[
"Hotta",
"Masahiro",
""
],
[
"Trevison",
"Jose",
""
],
[
"Yamaguchi",
"Koji",
""
]
] | In a Rindler-type coordinate system spanned in a region outside of a black hole horizon, we have nonvanishing classical holographic charges as soft hairs on the horizon for stationary black holes. Taking a large black hole mass limit, the spacetimes with the charges are described by asymptotic Rindler metrics. We const... |
0903.0878 | B. L. Hu | B. L. Hu | Emergent/Quantum Gravity: Macro/Micro Structures of Spacetime | 15 pages. Essay for invited talks at the Symposium on "Foundations of
Physics", University of Maryland, April 24-27, 2008, Workshop on "Emergent
Gravity", MIT, August 25-29, 2008. In Proceedings of DICE 08 Conference, J.
Phys. Conf. Ser. (2009) | J.Phys.Conf.Ser.174:012015,2009 | 10.1088/1742-6596/174/1/012015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Emergent gravity views spacetime as an entity emergent from a more complete
theory of interacting fundamental constituents valid at much finer resolution
or higher energies, usually assumed to be above the Planck energy. In this view
general relativity is an effective theory valid only at long wavelengths and
low ene... | [
{
"created": "Wed, 4 Mar 2009 22:54:58 GMT",
"version": "v1"
}
] | 2010-03-12 | [
[
"Hu",
"B. L.",
""
]
] | Emergent gravity views spacetime as an entity emergent from a more complete theory of interacting fundamental constituents valid at much finer resolution or higher energies, usually assumed to be above the Planck energy. In this view general relativity is an effective theory valid only at long wavelengths and low energ... |
1606.02152 | Hamish Clark | Kenneth K. H. Fung, Hamish A. Clark, Geraint F. Lewis, Xiaofeng Wu | A computational approach to the twin paradox in curved spacetime | 14 pages, 5 figues, Accepted for publication in EJP | null | 10.1088/0143-0807/37/5/055602 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Despite being a major component in the teaching of special relativity, the
twin `paradox' is generally not examined in courses on general relativity. Due
to the complexity of analytical solutions to the problem, the paradox is often
neglected entirely, and students are left with an incomplete understanding of
the rel... | [
{
"created": "Tue, 7 Jun 2016 14:24:57 GMT",
"version": "v1"
}
] | 2016-08-03 | [
[
"Fung",
"Kenneth K. H.",
""
],
[
"Clark",
"Hamish A.",
""
],
[
"Lewis",
"Geraint F.",
""
],
[
"Wu",
"Xiaofeng",
""
]
] | Despite being a major component in the teaching of special relativity, the twin `paradox' is generally not examined in courses on general relativity. Due to the complexity of analytical solutions to the problem, the paradox is often neglected entirely, and students are left with an incomplete understanding of the relat... |
2103.17218 | Pau Beltr\'an Palau | Pau Beltr\'an-Palau, Adri\'an del R\'io, Sergi Nadal-Gisbert, Jos\'e
Navarro-Salas | Note on the pragmatic mode-sum regularization method:
translational-splitting in a cosmological background | 10 pages | Phys. Rev. D 103, 105002 (2021) | 10.1103/PhysRevD.103.105002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The point-splitting renormalization method offers a prescription to calculate
finite expectation values of quadratic operators constructed from quantum
fields in a general curved spacetime. It has been recently shown by Levi and
Ori that when the background metric possesses an isometry, like stationary or
spherically... | [
{
"created": "Wed, 31 Mar 2021 17:06:54 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Jun 2021 16:36:40 GMT",
"version": "v2"
}
] | 2021-06-18 | [
[
"Beltrán-Palau",
"Pau",
""
],
[
"del Río",
"Adrián",
""
],
[
"Nadal-Gisbert",
"Sergi",
""
],
[
"Navarro-Salas",
"José",
""
]
] | The point-splitting renormalization method offers a prescription to calculate finite expectation values of quadratic operators constructed from quantum fields in a general curved spacetime. It has been recently shown by Levi and Ori that when the background metric possesses an isometry, like stationary or spherically s... |
2405.18604 | Stefan Hollands | Stefan Hollands and Vahid Toomani | Metric Reconstruction in Kerr Spacetime | 83pp, CQG format | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Metric reconstruction is the general problem of parameterizing GR in terms of
its two ``true degrees of freedom'', e.g., by a complex scalar ``potential'' --
in practice mostly with the aim of simplifying the Einstein equation (EE)
within perturbative approaches. In this paper, we re-analyze the metric
reconstruction... | [
{
"created": "Tue, 28 May 2024 21:33:57 GMT",
"version": "v1"
}
] | 2024-05-30 | [
[
"Hollands",
"Stefan",
""
],
[
"Toomani",
"Vahid",
""
]
] | Metric reconstruction is the general problem of parameterizing GR in terms of its two ``true degrees of freedom'', e.g., by a complex scalar ``potential'' -- in practice mostly with the aim of simplifying the Einstein equation (EE) within perturbative approaches. In this paper, we re-analyze the metric reconstruction p... |
2407.04002 | Bayram Tekin | Aydin Tavlayan and Bayram Tekin | Refined Thermodynamics of Black Holes with Proper Conserved Charges | 6 pages + 7 pages of supplementary material | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Field equations of a classical, geometric, theory of gravity, augmented with
some semiclassical considerations strongly suggest that the gravitational field
representing a stationary black hole can be simply described with a few
thermodynamical coordinates and their conjugates that obey the four laws of
thermodynamic... | [
{
"created": "Thu, 4 Jul 2024 15:22:18 GMT",
"version": "v1"
}
] | 2024-07-08 | [
[
"Tavlayan",
"Aydin",
""
],
[
"Tekin",
"Bayram",
""
]
] | Field equations of a classical, geometric, theory of gravity, augmented with some semiclassical considerations strongly suggest that the gravitational field representing a stationary black hole can be simply described with a few thermodynamical coordinates and their conjugates that obey the four laws of thermodynamics ... |
1603.08076 | Saeed Rastgoo | Hugo A. Morales-T\'ecotl, Daniel H. Orozco-Borunda, Saeed Rastgoo | Polymerization, the Problem of Access to the Saddle Point Approximation,
and Thermodynamics | 6 pages, Contribution to the proceedings of The Fourteenth Marcel
Grossmann Meeting - MG14, to appear in a related book published by World
Scientific, Singapore, 2016, text overlap with arXiv:1507.08651 [gr-qc] | null | 10.1142/9789813226609_0541 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The saddle point approximation to the partition functions is an important way
of deriving the thermodynamical properties of black holes. However, there are
certain black hole models and some mathematically analog mechanical models for
which this method can not be applied directly. This is due to the fact that
their a... | [
{
"created": "Sat, 26 Mar 2016 05:27:42 GMT",
"version": "v1"
}
] | 2017-11-21 | [
[
"Morales-Técotl",
"Hugo A.",
""
],
[
"Orozco-Borunda",
"Daniel H.",
""
],
[
"Rastgoo",
"Saeed",
""
]
] | The saddle point approximation to the partition functions is an important way of deriving the thermodynamical properties of black holes. However, there are certain black hole models and some mathematically analog mechanical models for which this method can not be applied directly. This is due to the fact that their act... |
2304.08510 | \'Angel Murcia | Javier Moreno, \'Angel J. Murcia | On the classification of Generalized Quasitopological Gravities | 42 pages, 2 appendices, no figures | null | 10.1103/PhysRevD.108.044016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Generalized Quasitopological Gravities (GQTGs) are higher-order extensions of
Einstein gravity in $D$ dimensions satisfying a number of interesting
properties, such as possessing second-order linearized equations of motion on
top of maximally symmetric backgrounds, admitting non-hairy generalizations of
the Schwarzsc... | [
{
"created": "Mon, 17 Apr 2023 18:00:00 GMT",
"version": "v1"
}
] | 2023-08-16 | [
[
"Moreno",
"Javier",
""
],
[
"Murcia",
"Ángel J.",
""
]
] | Generalized Quasitopological Gravities (GQTGs) are higher-order extensions of Einstein gravity in $D$ dimensions satisfying a number of interesting properties, such as possessing second-order linearized equations of motion on top of maximally symmetric backgrounds, admitting non-hairy generalizations of the Schwarzschi... |
gr-qc/9811070 | Rosario Martin | Rosario Martin and Enric Verdaguer | On the semiclassical Einstein-Langevin equation | 4 pages, RevTeX, no figures | Phys.Lett.B465:113-118,1999 | 10.1016/S0370-2693(99)01068-0 | null | gr-qc hep-th | null | We introduce a semiclassical Einstein-Langevin equation as a consistent
dynamical equation for a first order perturbative correction to semiclassical
gravity. This equation includes the lowest order quantum stress-energy
fluctuations of matter fields as a source of classical stochastic fluctuations
of the gravitation... | [
{
"created": "Thu, 19 Nov 1998 21:25:50 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Nov 1998 12:30:29 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Martin",
"Rosario",
""
],
[
"Verdaguer",
"Enric",
""
]
] | We introduce a semiclassical Einstein-Langevin equation as a consistent dynamical equation for a first order perturbative correction to semiclassical gravity. This equation includes the lowest order quantum stress-energy fluctuations of matter fields as a source of classical stochastic fluctuations of the gravitational... |
1402.6521 | Farhad Darabi | F. Darabi, S. Asgharinya | f(R) scalar-tensor cosmology by Noether symmetry | 7 pages | Chin. J. Phys. 53, 040101 (2015) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of f(R) scalar-tensor cosmology, we use the Noether symmetry
approach to find the cosmological models consistent with the Noether symmetry.
We obtain the functions f(R) and H(a), or the corresponding differential
equations, according to specific choices for the scalar field potential
V(\phi), the Bra... | [
{
"created": "Wed, 26 Feb 2014 12:55:34 GMT",
"version": "v1"
}
] | 2015-05-21 | [
[
"Darabi",
"F.",
""
],
[
"Asgharinya",
"S.",
""
]
] | In the framework of f(R) scalar-tensor cosmology, we use the Noether symmetry approach to find the cosmological models consistent with the Noether symmetry. We obtain the functions f(R) and H(a), or the corresponding differential equations, according to specific choices for the scalar field potential V(\phi), the Brans... |
1611.08090 | Alfred Molina | Xavier Ja\'en and Alfred Molina | Rigid covariance as a natural extension of Painlev\'e--Gullstrand
space-times: gravitational waves | 14 pages | null | 10.1007/s10714-017-2272-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The group of rigid motions is considered to guide the search for a natural
system of space-time coordinates in General Relativity. This search leads us to
a natural extension of the space-times that support Painlev\'{e}--Gullstrand
synchronization. As an interesting example, here we describe a system of rigid
coordin... | [
{
"created": "Thu, 24 Nov 2016 08:09:33 GMT",
"version": "v1"
}
] | 2017-08-02 | [
[
"Jaén",
"Xavier",
""
],
[
"Molina",
"Alfred",
""
]
] | The group of rigid motions is considered to guide the search for a natural system of space-time coordinates in General Relativity. This search leads us to a natural extension of the space-times that support Painlev\'{e}--Gullstrand synchronization. As an interesting example, here we describe a system of rigid coordinat... |
2012.05706 | Ermis Mitsou | Kirill Krasnov and Ermis Mitsou | Deformations of GR, Geometrodynamics and Reality Conditions | 31 pages | Class.Quant.Grav. 38 (2021) no. 8, 085009 | 10.1088/1361-6382/abe756 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In four dimensions complexified General Relativity (GR) can be non-trivially
deformed: There exists an (infinite-parameter) set of modifications all having
the same count of degrees of freedom. It is trivial to impose reality
conditions that give versions of the deformed theories corresponding to
Riemannian and split... | [
{
"created": "Thu, 10 Dec 2020 14:39:10 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Mar 2021 13:55:13 GMT",
"version": "v2"
}
] | 2021-03-22 | [
[
"Krasnov",
"Kirill",
""
],
[
"Mitsou",
"Ermis",
""
]
] | In four dimensions complexified General Relativity (GR) can be non-trivially deformed: There exists an (infinite-parameter) set of modifications all having the same count of degrees of freedom. It is trivial to impose reality conditions that give versions of the deformed theories corresponding to Riemannian and split m... |
1609.00155 | Banashree Sen | Farook Rahaman, G.C. Shit, Banashree Sen, Saibal Ray | Could wormholes form in dark matter galactic halos? | 6 pages, 2 figures | null | 10.1007/s10509-015-2626-7 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | We estimate expression for velocity as a function of the radial coordinate
$r$ by using polynomial interpolation based on the experimental data of
rotational velocities at distant outer regions of galaxies. The interpolation
technique has been used to estimate fifth degree polynomial followed by cubic
spline interpol... | [
{
"created": "Thu, 1 Sep 2016 09:21:01 GMT",
"version": "v1"
}
] | 2016-09-02 | [
[
"Rahaman",
"Farook",
""
],
[
"Shit",
"G. C.",
""
],
[
"Sen",
"Banashree",
""
],
[
"Ray",
"Saibal",
""
]
] | We estimate expression for velocity as a function of the radial coordinate $r$ by using polynomial interpolation based on the experimental data of rotational velocities at distant outer regions of galaxies. The interpolation technique has been used to estimate fifth degree polynomial followed by cubic spline interpolat... |
1805.02675 | Francesco Di Filippo | Ra\'ul Carballo-Rubio, Francesco Di Filippo, Stefano Liberati,
Costantino Pacilio and Matt Visser | On the viability of regular black holes | 14 pages + refs. 3 figures | JHEP 2018 (2018) 23 | 10.1007/JHEP07(2018)023 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The evaporation of black holes raises a number of conceptual issues, most of
them related to the final stages of evaporation, where the interplay between
the central singularity and Hawking radiation cannot be ignored. Regular models
of black holes replace the central singularity with a nonsingular spacetime
region, ... | [
{
"created": "Mon, 7 May 2018 18:02:15 GMT",
"version": "v1"
}
] | 2018-08-16 | [
[
"Carballo-Rubio",
"Raúl",
""
],
[
"Di Filippo",
"Francesco",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Pacilio",
"Costantino",
""
],
[
"Visser",
"Matt",
""
]
] | The evaporation of black holes raises a number of conceptual issues, most of them related to the final stages of evaporation, where the interplay between the central singularity and Hawking radiation cannot be ignored. Regular models of black holes replace the central singularity with a nonsingular spacetime region, in... |
gr-qc/0001044 | Warren G. Anderson | Warren G. Anderson, Patrick R. Brady, Jolien D. E. Creighton and Eanna
E. Flanagan | A power filter for the detection of burst sources of gravitational
radiation in interferometric detectors | 3 pages, RevTeX, GWDAW '99 proceedings contribution, submitted to
Int. J. Modern Phys. D | Int.J.Mod.Phys.D9:303-307,2000 | 10.1142/S0218271800000323 | WISC-MILW-00-TH-2 | gr-qc | null | We present a filter for detecting gravitational wave signals from burst
sources. This filter requires only minimal advance knowledge of the expected
signal: i.e. the signal's frequency band and time duration. It consists of a
threshold on the total power in the data stream in the specified signal band
during the spec... | [
{
"created": "Mon, 17 Jan 2000 17:36:08 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Anderson",
"Warren G.",
""
],
[
"Brady",
"Patrick R.",
""
],
[
"Creighton",
"Jolien D. E.",
""
],
[
"Flanagan",
"Eanna E.",
""
]
] | We present a filter for detecting gravitational wave signals from burst sources. This filter requires only minimal advance knowledge of the expected signal: i.e. the signal's frequency band and time duration. It consists of a threshold on the total power in the data stream in the specified signal band during the specif... |
1308.6677 | Daniel Heinert | Daniel Heinert, Stefanie Kroker, Daniel Friedrich, Stefan Hild,
Ernst-Bernhard Kley, Sean Leavey, Iain W. Martin, Ronny Nawrodt, Andreas
T\"unnermann, Sergey P. Vyatchanin, Kazuhiro Yamamoto | Calculation of thermal noise in grating reflectors | 17 pages, 11 figures | Phys. Rev. D 88, 042001, 2013 | 10.1103/PhysRevD.88.042001 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Grating reflectors have been repeatedly discussed to improve the noise
performance of metrological applications due to the reduction or absence of any
coating material. So far, however, no quantitative estimate on the thermal
noise of these reflective structures exists. In this work we present a
theoretical calculati... | [
{
"created": "Fri, 30 Aug 2013 08:31:06 GMT",
"version": "v1"
}
] | 2013-09-02 | [
[
"Heinert",
"Daniel",
""
],
[
"Kroker",
"Stefanie",
""
],
[
"Friedrich",
"Daniel",
""
],
[
"Hild",
"Stefan",
""
],
[
"Kley",
"Ernst-Bernhard",
""
],
[
"Leavey",
"Sean",
""
],
[
"Martin",
"Iain W.",
""
],
... | Grating reflectors have been repeatedly discussed to improve the noise performance of metrological applications due to the reduction or absence of any coating material. So far, however, no quantitative estimate on the thermal noise of these reflective structures exists. In this work we present a theoretical calculation... |
0902.1520 | Eyo Ita III | Eyo Ita | Dirac consistency of the algebra of Hamiltonian constraints in reduced
4-D general relativity | 17 Pages. Accepted by the Hadronic journal | Hadronic Journal. Vol 33, No. 6 (2010) p.637 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we provide an action related to a certain sector of general
relativity where the algebra of Hamiltonian constraints forms a first class
system. This action is a Dirac-consistent stand-alone action with two physical
degrees of freedom per point. In this paper we provide the steps necessary to
transform t... | [
{
"created": "Mon, 9 Feb 2009 20:53:59 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Jul 2010 10:19:19 GMT",
"version": "v2"
},
{
"created": "Thu, 30 Dec 2010 00:52:15 GMT",
"version": "v3"
},
{
"created": "Fri, 8 Apr 2011 20:05:26 GMT",
"version": "v4"
}
] | 2012-02-20 | [
[
"Ita",
"Eyo",
""
]
] | In this paper we provide an action related to a certain sector of general relativity where the algebra of Hamiltonian constraints forms a first class system. This action is a Dirac-consistent stand-alone action with two physical degrees of freedom per point. In this paper we provide the steps necessary to transform thi... |
1507.08457 | Frederico Francisco | O. Bertolami, F. Francisco, P.J.S. Gil | Hyperbolic orbits of Earth flybys and effects of ungravity-inspired
conservative potentials | 12 pages, 5 figures | Class. Quantum Grav. 33 (2016) 125021 | 10.1088/0264-9381/33/12/125021 | null | gr-qc physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we take a critical look at the available data on the flyby
anomaly and on the current limitations of attempts to develop an explanation.
We aim to verify how conservative corrections to gravity could affect the
hyperbolic trajectories of Earth flybys. We use ungravity-inspired potentials
as illustrative ... | [
{
"created": "Thu, 30 Jul 2015 11:16:48 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Aug 2015 12:46:02 GMT",
"version": "v2"
},
{
"created": "Thu, 19 May 2016 13:23:41 GMT",
"version": "v3"
}
] | 2016-05-20 | [
[
"Bertolami",
"O.",
""
],
[
"Francisco",
"F.",
""
],
[
"Gil",
"P. J. S.",
""
]
] | In this work we take a critical look at the available data on the flyby anomaly and on the current limitations of attempts to develop an explanation. We aim to verify how conservative corrections to gravity could affect the hyperbolic trajectories of Earth flybys. We use ungravity-inspired potentials as illustrative ex... |
1406.3069 | Carlos A. Batista da S. Filho | Carlos Batista | Integrability Conditions for Killing-Yano Tensors and Conformal
Killing-Yano Tensors | 20 pages. Some references and a conclusion section have been added in
order to match the published version | Physical Review D 91 (2015), 024013 | 10.1103/PhysRevD.91.024013 | null | gr-qc hep-th math.DG | http://creativecommons.org/licenses/by/3.0/ | The integrability conditions for the existence of a conformal Killing-Yano
tensor of arbitrary order are worked out in all dimensions and expressed in
terms of the Weyl tensor. As a consequence, the integrability conditions for
the existence of a Killing-Yano tensor are also obtained. By means of such
conditions, it ... | [
{
"created": "Wed, 11 Jun 2014 21:23:47 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Oct 2014 17:31:49 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Jan 2015 00:35:17 GMT",
"version": "v3"
}
] | 2015-01-15 | [
[
"Batista",
"Carlos",
""
]
] | The integrability conditions for the existence of a conformal Killing-Yano tensor of arbitrary order are worked out in all dimensions and expressed in terms of the Weyl tensor. As a consequence, the integrability conditions for the existence of a Killing-Yano tensor are also obtained. By means of such conditions, it is... |
gr-qc/0410127 | Eric Poisson | Eric Poisson | The gravitational self-force | 10 pages,2 postscript figures, revtex4. This article is based on a
plenary lecture presented at GR17 | null | 10.1142/9789812701688_0012 | null | gr-qc | null | The self-force describes the effect of a particle's own gravitational field
on its motion. While the motion is geodesic in the test-mass limit, it is
accelerated to first order in the particle's mass. In this contribution I
review the foundations of the self-force, and show how the motion of a small
black hole can be... | [
{
"created": "Tue, 26 Oct 2004 22:26:34 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Poisson",
"Eric",
""
]
] | The self-force describes the effect of a particle's own gravitational field on its motion. While the motion is geodesic in the test-mass limit, it is accelerated to first order in the particle's mass. In this contribution I review the foundations of the self-force, and show how the motion of a small black hole can be d... |
0907.4397 | George Chapline F | George Chapline | Dark Energy Stars and AdS/CFT | Talk at the 12th Marcel Grossman Meeting | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The theory of dark energy stars illustrates how the behavior of matter near
to certain kinds of quantum critical phase transitions can be given a
geometrical interpretation by regarding the criticality tuning parameter as an
extra dimension. In the case of a superfluid with vanishing speed of sound, the
implied geome... | [
{
"created": "Sat, 25 Jul 2009 01:59:12 GMT",
"version": "v1"
}
] | 2009-07-28 | [
[
"Chapline",
"George",
""
]
] | The theory of dark energy stars illustrates how the behavior of matter near to certain kinds of quantum critical phase transitions can be given a geometrical interpretation by regarding the criticality tuning parameter as an extra dimension. In the case of a superfluid with vanishing speed of sound, the implied geometr... |
1205.3876 | Marcus Werner | M. C. Werner | Gravitational lensing in the Kerr-Randers optical geometry | 7 pages, 1 figure. Accepted by Gen. Rel. Grav. Version 2: change of
notation in sec. 3 | Gen. Rel. Grav. 44, 3047-3057 (2012) | 10.1007/s10714-012-1458-9 | null | gr-qc astro-ph.GA math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new geometric method to determine the deflection of light in the equatorial
plane of the Kerr solution is presented, whose optical geometry is a surface
with a Finsler metric of Randers type. Applying the Gauss-Bonnet theorem to a
suitable osculating Riemannian manifold, adapted from a construction by Naz\i
m, it i... | [
{
"created": "Thu, 17 May 2012 08:10:36 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Nov 2012 01:26:07 GMT",
"version": "v2"
}
] | 2015-06-05 | [
[
"Werner",
"M. C.",
""
]
] | A new geometric method to determine the deflection of light in the equatorial plane of the Kerr solution is presented, whose optical geometry is a surface with a Finsler metric of Randers type. Applying the Gauss-Bonnet theorem to a suitable osculating Riemannian manifold, adapted from a construction by Naz\i m, it is ... |
1204.0702 | Daniele Pranzetti | Daniele Pranzetti | Radiation from quantum weakly dynamical horizons in LQG | 9 pages, 2 figures | Phys. Rev. Lett. 109, 011301 (2012) | 10.1103/PhysRevLett.109.011301 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the recent thermodynamical study of isolated horizons by Ghosh and
Perez, we provide a statistical mechanical analysis of isolated horizons near
equilibrium in the grand canonical ensemble. By matching the description of the
dynamical phase in terms of weakly dynamical horizons with this local
statistical frame... | [
{
"created": "Tue, 3 Apr 2012 14:43:48 GMT",
"version": "v1"
}
] | 2012-08-15 | [
[
"Pranzetti",
"Daniele",
""
]
] | Using the recent thermodynamical study of isolated horizons by Ghosh and Perez, we provide a statistical mechanical analysis of isolated horizons near equilibrium in the grand canonical ensemble. By matching the description of the dynamical phase in terms of weakly dynamical horizons with this local statistical framewo... |
2105.03349 | Gabriele Franciolini | Gabriele Franciolini, Vishal Baibhav, Valerio De Luca, Ken K. Y. Ng,
Kaze W. K. Wong, Emanuele Berti, Paolo Pani, Antonio Riotto, Salvatore Vitale | Searching for a subpopulation of primordial black holes in LIGO/Virgo
gravitational-wave data | 13 pages, 7 figures. v3: matching published version | null | 10.1103/PhysRevD.105.083526 | null | gr-qc astro-ph.CO astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With several dozen binary black hole events detected by LIGO/Virgo to date
and many more expected in the next few years, gravitational-wave astronomy is
shifting from individual-event analyses to population studies. Using the GWTC-2
catalog, we perform a hierarchical Bayesian analysis that for the first time
combines... | [
{
"created": "Fri, 7 May 2021 16:02:02 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Jun 2021 14:58:43 GMT",
"version": "v2"
},
{
"created": "Wed, 4 May 2022 15:26:50 GMT",
"version": "v3"
}
] | 2022-05-11 | [
[
"Franciolini",
"Gabriele",
""
],
[
"Baibhav",
"Vishal",
""
],
[
"De Luca",
"Valerio",
""
],
[
"Ng",
"Ken K. Y.",
""
],
[
"Wong",
"Kaze W. K.",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Pani",
"Paolo",
""
],
... | With several dozen binary black hole events detected by LIGO/Virgo to date and many more expected in the next few years, gravitational-wave astronomy is shifting from individual-event analyses to population studies. Using the GWTC-2 catalog, we perform a hierarchical Bayesian analysis that for the first time combines s... |
2109.08373 | Sergey Rubin | Sergey G. Rubin, Julio C. Fabris | Distortion of extra dimensions in the inflationary Multiverse | 13 pages, 1 figure | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We discuss the effect of the quantum fluctuations at high energies on the
final shape of compact extra dimensions. The quantum fluctuations produce a
wide range of the initial extra metrics in causally disconnected regions
(pocket universes) of the Multiverse during the inflationary stage. This set of
initial extra m... | [
{
"created": "Fri, 17 Sep 2021 07:00:57 GMT",
"version": "v1"
}
] | 2021-09-20 | [
[
"Rubin",
"Sergey G.",
""
],
[
"Fabris",
"Julio C.",
""
]
] | We discuss the effect of the quantum fluctuations at high energies on the final shape of compact extra dimensions. The quantum fluctuations produce a wide range of the initial extra metrics in causally disconnected regions (pocket universes) of the Multiverse during the inflationary stage. This set of initial extra met... |
1803.03933 | Giovanni Tricella | Stefano Liberati (SISSA, INFN), Giovanni Tricella (SISSA, INFN), Matt
Visser (Victoria University of Wellington) | Towards a Gordon form of the Kerr spacetime | 20 pages | Classical and Quantum Gravity 35 (2018) 155004 | 10.1088/1361-6382/aacb75 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is not currently known how to put the Kerr spacetime metric into the
so-called Gordon form, although the closely related Kerr-Schild form of the
Kerr metric is well known. A Gordon form for the Kerr geometry, if it could be
found, would be particularly useful in developing analogue models for the Kerr
spacetime, s... | [
{
"created": "Sun, 11 Mar 2018 10:23:45 GMT",
"version": "v1"
}
] | 2018-08-16 | [
[
"Liberati",
"Stefano",
"",
"SISSA, INFN"
],
[
"Tricella",
"Giovanni",
"",
"SISSA, INFN"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | It is not currently known how to put the Kerr spacetime metric into the so-called Gordon form, although the closely related Kerr-Schild form of the Kerr metric is well known. A Gordon form for the Kerr geometry, if it could be found, would be particularly useful in developing analogue models for the Kerr spacetime, sin... |
0711.1995 | Liao Liu | Liao Liu | Quantum de Sitter Space-Time and the Dark Energy | 4 pages | null | null | null | gr-qc | null | Three years ago, we introduced a new way to quantize the static Schwarzschild
black hole(SSBH), there the SSBH was first treated as a single periodic
Euclidean system and then the Bohr-Sommerfeld quantum condition of action was
used to obtain a quantum theory of Schwarzschild black hole.[1] Now in this
short report, ... | [
{
"created": "Tue, 13 Nov 2007 14:45:54 GMT",
"version": "v1"
}
] | 2007-11-14 | [
[
"Liu",
"Liao",
""
]
] | Three years ago, we introduced a new way to quantize the static Schwarzschild black hole(SSBH), there the SSBH was first treated as a single periodic Euclidean system and then the Bohr-Sommerfeld quantum condition of action was used to obtain a quantum theory of Schwarzschild black hole.[1] Now in this short report, we... |
1108.1371 | Ramon Herrera | Ramon Herrera and Eugenio San Martin | Warm-Intermediate inflationary universe model in braneworld cosmologies | 19 pages, 2 figures. Published in Eur. Phys. J. C. arXiv admin note:
substantial overlap with arXiv:0903.4214 and arXiv:1003.5645 | Eur.Phys.J.C71:1701,2011 | 10.1140/epjc/s10052-011-1701-7 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Warm-intermediate inflationary universe models in the context of braneworld
cosmologies, are studied. This study is done in the weak and strong dissipative
regimes. We find that, the scalar potentials and dissipation coefficients in
terms of the scalar field, evolves as type-power-law and powers of logarithms,
respec... | [
{
"created": "Fri, 5 Aug 2011 17:02:13 GMT",
"version": "v1"
}
] | 2011-12-25 | [
[
"Herrera",
"Ramon",
""
],
[
"Martin",
"Eugenio San",
""
]
] | Warm-intermediate inflationary universe models in the context of braneworld cosmologies, are studied. This study is done in the weak and strong dissipative regimes. We find that, the scalar potentials and dissipation coefficients in terms of the scalar field, evolves as type-power-law and powers of logarithms, respecti... |
0901.0791 | Sigbjorn Hervik | Alan Coley, Sigbjorn Hervik, Nicos Pelavas | Spacetimes characterized by their scalar curvature invariants | 38pages; v2: some corrections + refs | Class.Quant.Grav.26:025013,2009 | 10.1088/0264-9381/26/2/025013 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we determine the class of four-dimensional Lorentzian manifolds
that can be completely characterized by the scalar polynomial curvature
invariants constructed from the Riemann tensor and its covariant derivatives.
We introduce the notion of an $\mathcal{I}$-non-degenerate spacetime metric,
which implies... | [
{
"created": "Wed, 7 Jan 2009 09:37:51 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Aug 2009 06:42:26 GMT",
"version": "v2"
}
] | 2009-08-17 | [
[
"Coley",
"Alan",
""
],
[
"Hervik",
"Sigbjorn",
""
],
[
"Pelavas",
"Nicos",
""
]
] | In this paper we determine the class of four-dimensional Lorentzian manifolds that can be completely characterized by the scalar polynomial curvature invariants constructed from the Riemann tensor and its covariant derivatives. We introduce the notion of an $\mathcal{I}$-non-degenerate spacetime metric, which implies t... |
2212.00198 | Hideki Asada | Yuya Nakamura, Hideki Asada | Collinear and triangular solutions to the coplanar and circular
three-body problem in the parametrized post-Newtonian formalism | 8 pages, 2 figures, typos corrected, version matched with publication
in PRD | Phys. Rev. D 107, 044005 (2023) | 10.1103/PhysRevD.107.044005 | null | gr-qc astro-ph.EP hep-th nlin.SI | http://creativecommons.org/licenses/by/4.0/ | This paper investigates the coplanar and circular three-body problem in the
parametrized post-Newtonian (PPN) formalism, for which we focus on a class of
fully conservative theories characterized by the Eddington-Robertson parameters
$\beta$ and $\gamma$. It is shown that there can still exist a collinear
equilibrium... | [
{
"created": "Thu, 1 Dec 2022 00:55:39 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Jan 2023 06:08:22 GMT",
"version": "v2"
},
{
"created": "Sat, 4 Feb 2023 05:52:37 GMT",
"version": "v3"
}
] | 2023-02-15 | [
[
"Nakamura",
"Yuya",
""
],
[
"Asada",
"Hideki",
""
]
] | This paper investigates the coplanar and circular three-body problem in the parametrized post-Newtonian (PPN) formalism, for which we focus on a class of fully conservative theories characterized by the Eddington-Robertson parameters $\beta$ and $\gamma$. It is shown that there can still exist a collinear equilibrium c... |
1801.02495 | Yan Peng | Yan Peng | Scalar field configurations supported by charged compact reflecting
stars in a curved spacetime | 10 pages, 4 figures. Accepted for publication in PLB. arXiv admin
note: text overlap with arXiv:1711.06978 | Physics Letters B 780(2018)144-148 | 10.1016/j.physletb.2018.02.068 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the system of static scalar fields coupled to charged compact
reflecting stars through both analytical and numerical methods. We enclose the
star in a box and our solutions are related to cases without box boundaries
when putting the box far away from the star. We provide bottom and upper bounds
for the radi... | [
{
"created": "Fri, 5 Jan 2018 08:10:24 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Jan 2018 17:21:35 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Feb 2018 08:08:10 GMT",
"version": "v3"
}
] | 2018-03-28 | [
[
"Peng",
"Yan",
""
]
] | We study the system of static scalar fields coupled to charged compact reflecting stars through both analytical and numerical methods. We enclose the star in a box and our solutions are related to cases without box boundaries when putting the box far away from the star. We provide bottom and upper bounds for the radius... |
1704.00593 | Joseph Sullivan | Joseph Sullivan | The Superradiant Instability in AdS | Essay from Part III of the Mathematical Tripos at the University of
Cambridge | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the intermediate and end state behavior of the superradiantly
perturbed Kerr black hole. Superradiant scattering in an asymptotically flat
background is considered first. The case of a Kerr black hole in an Anti
de-Sitter background is then discussed. Specifically we review what is known
about the superra... | [
{
"created": "Mon, 27 Mar 2017 01:36:11 GMT",
"version": "v1"
}
] | 2017-04-05 | [
[
"Sullivan",
"Joseph",
""
]
] | We consider the intermediate and end state behavior of the superradiantly perturbed Kerr black hole. Superradiant scattering in an asymptotically flat background is considered first. The case of a Kerr black hole in an Anti de-Sitter background is then discussed. Specifically we review what is known about the superradi... |
2005.09677 | T. Padmanabhan | T. Padmanabhan | Principle of Equivalence at Planck scales, QG in locally inertial frames
and the zero-point-length of spacetime | 16 pages; no figures | Gen Relativ Gravit 52, 90 (2020) | 10.1007/s10714-020-02745-4 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Principle of Equivalence makes effects of classical gravity vanish in local
inertial frames. What role does the Principle of Equivalence play as regards
quantum gravitational effects in the local inertial frames? I address this
question here from a specific perspective. At mesoscopic scales close to, but
somewhat lar... | [
{
"created": "Tue, 19 May 2020 18:03:16 GMT",
"version": "v1"
}
] | 2020-10-01 | [
[
"Padmanabhan",
"T.",
""
]
] | Principle of Equivalence makes effects of classical gravity vanish in local inertial frames. What role does the Principle of Equivalence play as regards quantum gravitational effects in the local inertial frames? I address this question here from a specific perspective. At mesoscopic scales close to, but somewhat large... |
2403.13095 | Clara Rojas | Abbad Moussa, Houcine Aounallah, Sebasti\'an Valladares and Clara
Rojas | A relativistic position--dependent mass system of bosonic field in
cosmic string space--time background | 10 pages, 2 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | In this work, we investigate the relativistic quantum motions of spin--zero
scalar bosons via the Duffin--Kemmer--Petiau (DKP) equation with a
position--dependent mass (PDM) system in the background of the topological
defect space--time produced by a cosmic string. We determine the radial wave
equation and obtain the... | [
{
"created": "Tue, 19 Mar 2024 18:54:05 GMT",
"version": "v1"
}
] | 2024-03-21 | [
[
"Moussa",
"Abbad",
""
],
[
"Aounallah",
"Houcine",
""
],
[
"Valladares",
"Sebastián",
""
],
[
"Rojas",
"Clara",
""
]
] | In this work, we investigate the relativistic quantum motions of spin--zero scalar bosons via the Duffin--Kemmer--Petiau (DKP) equation with a position--dependent mass (PDM) system in the background of the topological defect space--time produced by a cosmic string. We determine the radial wave equation and obtain the e... |
1312.4823 | Andr\'e Costa | V. B. Bezerra, H. S. Vieira and Andr\'e A. Costa | The Klein-Gordon equation in the spacetime of a charged and rotating
black hole | 13 pages | Class. Quantum Grav. 31 (2014) 045003 | 10.1088/0264-9381/31/4/045003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work deals with the influence of the gravitational field produced by a
charged and rotating black hole (Kerr-Newman spacetime) on massive scalar
fields. We obtain an exact solution of the Klein-Gordon equation in this
spacetime, which is given in terms of the confluent Heun functions. In the
particular case corr... | [
{
"created": "Tue, 17 Dec 2013 15:27:40 GMT",
"version": "v1"
}
] | 2014-01-24 | [
[
"Bezerra",
"V. B.",
""
],
[
"Vieira",
"H. S.",
""
],
[
"Costa",
"André A.",
""
]
] | This work deals with the influence of the gravitational field produced by a charged and rotating black hole (Kerr-Newman spacetime) on massive scalar fields. We obtain an exact solution of the Klein-Gordon equation in this spacetime, which is given in terms of the confluent Heun functions. In the particular case corres... |
1001.2990 | Gagik Ter-Kazarian | Gagik Ter-Kazarian | Gravitation and inertia; a rearrangement of vacuum in gravity | 17 pages, no figures, revtex4, Accepted for publication in Astrophys.
Space Sci | Astrophys.Space Sci.327:91-109,2010 | 10.1007/s10509-010-0282-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We address the gravitation and inertia in the framework of 'general gauge
principle', which accounts for 'gravitation gauge group' generated by hidden
local internal symmetry implemented on the flat space. We connect this group to
nonlinear realization of the Lie group of 'distortion' of local internal
properties of ... | [
{
"created": "Mon, 18 Jan 2010 09:45:12 GMT",
"version": "v1"
}
] | 2010-04-30 | [
[
"Ter-Kazarian",
"Gagik",
""
]
] | We address the gravitation and inertia in the framework of 'general gauge principle', which accounts for 'gravitation gauge group' generated by hidden local internal symmetry implemented on the flat space. We connect this group to nonlinear realization of the Lie group of 'distortion' of local internal properties of si... |
1807.04649 | Antonio Lopez Maroto | Miguel Aparicio Resco, Antonio L. Maroto | Parametrizing modified gravities with vector degrees of freedom:
anisotropic growth and lensing | 13 pages. Matches version published in JCAP | null | 10.1088/1475-7516/2018/10/014 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the problem of parametrizing modified gravity theories that
include an additional vector field in the sub-Hubble regime within the
quasi-static approximation. We start from the most general set of second order
equations for metric and vector field perturbations and allow for both temporal
and spatial comp... | [
{
"created": "Wed, 11 Jul 2018 10:02:56 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Oct 2018 10:42:51 GMT",
"version": "v2"
}
] | 2018-10-17 | [
[
"Resco",
"Miguel Aparicio",
""
],
[
"Maroto",
"Antonio L.",
""
]
] | We consider the problem of parametrizing modified gravity theories that include an additional vector field in the sub-Hubble regime within the quasi-static approximation. We start from the most general set of second order equations for metric and vector field perturbations and allow for both temporal and spatial compon... |
gr-qc/0106022 | Jmorris | J.R. Morris | Generalized Slow Roll Conditions and the Possibility of Intermediate
Scale Inflation in Scalar-Tensor Theory | 14 pages, no figs. Accepted to Classical and Quantum Gravity | Class.Quant.Grav. 18 (2001) 2977-2988 | 10.1088/0264-9381/18/15/311 | null | gr-qc astro-ph hep-th | null | Generalized slow roll conditions and parameters are obtained for a general
form of scalar-tensor theory (with no external sources), having arbitrary
functions describing a nonminimal gravitational coupling F(\phi), a Kahler-like
kinetic function k(\phi), and a scalar potential V(\phi). These results are
then used to ... | [
{
"created": "Wed, 6 Jun 2001 16:05:13 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Morris",
"J. R.",
""
]
] | Generalized slow roll conditions and parameters are obtained for a general form of scalar-tensor theory (with no external sources), having arbitrary functions describing a nonminimal gravitational coupling F(\phi), a Kahler-like kinetic function k(\phi), and a scalar potential V(\phi). These results are then used to an... |
1307.5818 | Nivaldo Agostinho Lemos | Nivaldo A. Lemos | On what does not expand in an expanding universe: a very simple model | 8 pages | null | 10.1007/s13538-013-0152-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As the separation between galaxies increases owing to the expansion of the
universe, galaxies themselves and smaller bound structures do not grow. An
accurate description of the dynamics of cosmic structures requires the full
apparatus of general relativity. In order to gain a fairly satisfactory
understanding of wha... | [
{
"created": "Mon, 22 Jul 2013 18:57:17 GMT",
"version": "v1"
}
] | 2013-07-23 | [
[
"Lemos",
"Nivaldo A.",
""
]
] | As the separation between galaxies increases owing to the expansion of the universe, galaxies themselves and smaller bound structures do not grow. An accurate description of the dynamics of cosmic structures requires the full apparatus of general relativity. In order to gain a fairly satisfactory understanding of what ... |
1311.4481 | T.G Zlosnik | Joao Magueijo, Matias Rodriguez-Vazquez, Hans Westman, T.G. Zlosnik | Cosmological signature change in Cartan Gravity with dynamical symmetry
breaking | Matches published version | Phys. Rev. D 89, 063542 (2014) | 10.1103/PhysRevD.89.063542 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the possibility for classical metric signature change in a
straightforward generalization of the first order formulation of gravity,
dubbed "Cartan gravity". The mathematical structure of this theory mimics the
electroweak theory in that the basic ingredients are an $SO(1,4)$ Yang-Mills
gauge field $A^... | [
{
"created": "Mon, 18 Nov 2013 18:29:28 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Mar 2014 15:17:42 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Apr 2014 13:33:42 GMT",
"version": "v3"
}
] | 2014-04-30 | [
[
"Magueijo",
"Joao",
""
],
[
"Rodriguez-Vazquez",
"Matias",
""
],
[
"Westman",
"Hans",
""
],
[
"Zlosnik",
"T. G.",
""
]
] | We investigate the possibility for classical metric signature change in a straightforward generalization of the first order formulation of gravity, dubbed "Cartan gravity". The mathematical structure of this theory mimics the electroweak theory in that the basic ingredients are an $SO(1,4)$ Yang-Mills gauge field $A^{a... |
2201.00510 | Susobhan Mandal | Susobhan Mandal | Solitons in curved spacetime | 10 pages | EPL, 136 (2021) 11001 | 10.1209/0295-5075/ac31dc | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Derrick's theorem is an important result that decides the existence of
soliton configurations in field theories in different dimensions. It is proved
using the extremization of finite energy of configurations under the scaling
transformation. According to this theorem, the $2+1$ dimension is the critical
dimension fo... | [
{
"created": "Mon, 3 Jan 2022 07:46:12 GMT",
"version": "v1"
}
] | 2022-01-04 | [
[
"Mandal",
"Susobhan",
""
]
] | Derrick's theorem is an important result that decides the existence of soliton configurations in field theories in different dimensions. It is proved using the extremization of finite energy of configurations under the scaling transformation. According to this theorem, the $2+1$ dimension is the critical dimension for ... |
gr-qc/0402065 | Seoktae Koh | Seoktae Koh, Sang Pyo Kim, and Doo Jong Song | Gravitational Wave Spectrum in Inflation with Nonclassical States | 21 pages | JHEP 0412 (2004) 060 | 10.1088/1126-6708/2004/12/060 | null | gr-qc astro-ph hep-th | null | The initial quantum state during inflation may evolve to a highly squeezed
quantum state due to the amplification of the time-dependent parameter,
$\omega_{phys}(k/a)$, which may be the modified dispersion relation in
trans-Planckian physics. This squeezed quantum state is a nonclassical state
that has no counterpart... | [
{
"created": "Fri, 13 Feb 2004 19:02:25 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Koh",
"Seoktae",
""
],
[
"Kim",
"Sang Pyo",
""
],
[
"Song",
"Doo Jong",
""
]
] | The initial quantum state during inflation may evolve to a highly squeezed quantum state due to the amplification of the time-dependent parameter, $\omega_{phys}(k/a)$, which may be the modified dispersion relation in trans-Planckian physics. This squeezed quantum state is a nonclassical state that has no counterpart i... |
2404.06584 | Constantinos Skordis | Luc Blanchet and Constantinos Skordis | Relativistic Khronon Theory in agreement with Modified Newtonian
Dynamics and Large-Scale Cosmology | 32 pages, 1 figure | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose an extension of General Relativity (GR) based on a space-time
foliation by three-dimensional space-like hypersurfaces labeled by the Khronon
scalar field $\tau$. We show that this theory (i) leads to modified Newtonian
dynamics (MOND) at galactic scales for stationary systems; (ii) recovers GR
plus a cosmo... | [
{
"created": "Tue, 9 Apr 2024 19:26:19 GMT",
"version": "v1"
}
] | 2024-04-11 | [
[
"Blanchet",
"Luc",
""
],
[
"Skordis",
"Constantinos",
""
]
] | We propose an extension of General Relativity (GR) based on a space-time foliation by three-dimensional space-like hypersurfaces labeled by the Khronon scalar field $\tau$. We show that this theory (i) leads to modified Newtonian dynamics (MOND) at galactic scales for stationary systems; (ii) recovers GR plus a cosmolo... |
1904.07510 | Junji Jia | Nan Yang, Junji Jia, Xionghui Liu and Hongbao Zhang | Constraining Chaplygin models using diffuse supernova neutrino
background | 12 pages, 2 figure and 4 tables; discussion part extended | Physics of the Dark Universe 26, 100397(2019) | 10.1016/j.dark.2019.100397 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we examine the possibility of using the diffuse supernova
neutrino background (DSNB) to test the Chaplygin gas (CG) models of the
Universe. With a typical supernova rate $R_{\mathrm{SN}}(z)$ and supernova
neutrino spectrum $\mathrm{d} N(E_\nu)/\mathrm{d} E_\nu$, the DSNB flux
spectrum $n(E_\nu)$ in thre... | [
{
"created": "Tue, 16 Apr 2019 07:45:47 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Apr 2019 03:23:25 GMT",
"version": "v2"
},
{
"created": "Wed, 20 Nov 2019 14:00:54 GMT",
"version": "v3"
}
] | 2019-11-21 | [
[
"Yang",
"Nan",
""
],
[
"Jia",
"Junji",
""
],
[
"Liu",
"Xionghui",
""
],
[
"Zhang",
"Hongbao",
""
]
] | In this work, we examine the possibility of using the diffuse supernova neutrino background (DSNB) to test the Chaplygin gas (CG) models of the Universe. With a typical supernova rate $R_{\mathrm{SN}}(z)$ and supernova neutrino spectrum $\mathrm{d} N(E_\nu)/\mathrm{d} E_\nu$, the DSNB flux spectrum $n(E_\nu)$ in three ... |
1802.08711 | Herondy Mota | K. Bakke and H. Mota | Dirac ocillator in the cosmic string spacetime in the context of
gravity's rainbow | 17 pages, 3 figues | null | 10.1140/epjp/i2018-12268-6 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider the Dirac oscillator in the context of Doubly
General Relativity or Gravity's Rainbow. In order to obtain the energy levels
of the Dirac oscillator, we solve the Dirac equation in the cosmic string
spacetime modified by gravity's rainbow scenarios described by two rainbow
functions. We then ... | [
{
"created": "Fri, 23 Feb 2018 19:32:34 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Mar 2018 13:07:46 GMT",
"version": "v2"
}
] | 2019-02-28 | [
[
"Bakke",
"K.",
""
],
[
"Mota",
"H.",
""
]
] | In this paper we consider the Dirac oscillator in the context of Doubly General Relativity or Gravity's Rainbow. In order to obtain the energy levels of the Dirac oscillator, we solve the Dirac equation in the cosmic string spacetime modified by gravity's rainbow scenarios described by two rainbow functions. We then ob... |
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