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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1805.00906 | Nora Breton | Ivan Perez-Roman and Nora Bret\'on | The region interior to the event horizon of the Regular Hayward Black
Hole | 13 pages, 7 figures, Accepted to be published in General Relativity
and Gravitation | Gen. Relativ. Gravit. (2018) 50:64 | 10.1007/s10714-018-2385-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Painlev\'e-Gullstrand coordinates allow us to explore the interior of the
regular Hayward black hole. The behavior of an infalling particle in traversing
the Hayward black hole is compared with the one inside the Schwarzschild and
Reissner-Nordstrom singular black holes. When approaching the origin the test
parti... | [
{
"created": "Wed, 2 May 2018 17:02:05 GMT",
"version": "v1"
}
] | 2018-05-30 | [
[
"Perez-Roman",
"Ivan",
""
],
[
"Bretón",
"Nora",
""
]
] | The Painlev\'e-Gullstrand coordinates allow us to explore the interior of the regular Hayward black hole. The behavior of an infalling particle in traversing the Hayward black hole is compared with the one inside the Schwarzschild and Reissner-Nordstrom singular black holes. When approaching the origin the test particl... |
2210.06531 | Manuel Rodrigues | Manuel E. Rodrigues and Henrique A. Vieira | Bardeen solution with a cloud of strings | 16 pages, 12 figures | Phys. Rev. D 106, 084015 (2022) | 10.1103/PhysRevD.106.084015 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we present a Bardeen solution surrounded by a cloud of strings
fluid. We show how this model has the same event horizon characteristic as the
Bardeen solution, however, the parameter of the strings make the solution
singular at the origin. We also analyze the solution from a thermodynamic point
of view.... | [
{
"created": "Wed, 12 Oct 2022 18:56:07 GMT",
"version": "v1"
}
] | 2022-10-14 | [
[
"Rodrigues",
"Manuel E.",
""
],
[
"Vieira",
"Henrique A.",
""
]
] | In this paper we present a Bardeen solution surrounded by a cloud of strings fluid. We show how this model has the same event horizon characteristic as the Bardeen solution, however, the parameter of the strings make the solution singular at the origin. We also analyze the solution from a thermodynamic point of view. W... |
gr-qc/9911016 | Ulrich H. Gerlach | Ulrich H. Gerlach | Paired accelerated arames: The perfect interferometer with everywhere
smooth wave amplitudes | 38 pages, RevTex, 10 figures, 4 mathematical tutorials. Html version
of the figures and of related papers available at
http://www.math.ohio-state.edu/~gerlach | Phys.Rev.D59:104009,1999 | 10.1103/PhysRevD.59.104009 | null | gr-qc | null | Rindler's acceleration-induced partitioning of spacetime leads to a
nature-given interferometer. It accomodates quantum mechanical and wave
mechanical processes in spacetime which in (Euclidean) optics correspond to
wave processes in a ``Mach-Zehnder'' interferometer: amplitude splitting,
reflection, and interference... | [
{
"created": "Thu, 4 Nov 1999 20:25:13 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Gerlach",
"Ulrich H.",
""
]
] | Rindler's acceleration-induced partitioning of spacetime leads to a nature-given interferometer. It accomodates quantum mechanical and wave mechanical processes in spacetime which in (Euclidean) optics correspond to wave processes in a ``Mach-Zehnder'' interferometer: amplitude splitting, reflection, and interference. ... |
1509.00833 | Flavio Mercati | Flavio Mercati, Henrique Gomes, Tim Koslowski and Andrea Napoletano | Gravitational collapse of thin shells of dust in asymptotically flat
Shape Dynamics | 14 pages, 1 figure. Significantly improved and condensed version over
v1 | Phys. Rev. D 95, 044013 (2017) | 10.1103/PhysRevD.95.044013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent paper, one of us studied spherically symmetric, asymptotically
flat solutions of Shape Dynamics, finding that the spatial metric has
characteristics of a wormhole - two asymptotically flat ends and a minimal-area
sphere, or `throat', in between. In this paper we investigate whether that
solution can emerg... | [
{
"created": "Wed, 2 Sep 2015 19:46:40 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Sep 2016 03:18:04 GMT",
"version": "v2"
}
] | 2017-02-22 | [
[
"Mercati",
"Flavio",
""
],
[
"Gomes",
"Henrique",
""
],
[
"Koslowski",
"Tim",
""
],
[
"Napoletano",
"Andrea",
""
]
] | In a recent paper, one of us studied spherically symmetric, asymptotically flat solutions of Shape Dynamics, finding that the spatial metric has characteristics of a wormhole - two asymptotically flat ends and a minimal-area sphere, or `throat', in between. In this paper we investigate whether that solution can emerge ... |
1902.08075 | Richard Woodard | S. Deser and R. P. Woodard | Nonlocal Cosmology II --- Cosmic acceleration without fine tuning or
dark energy | 18 pages, 4 figures, uses LaTeX2e version 2 revised for publication | JCAP 06 (2019) 034 | 10.1088/1475-7516/2019/06/034 | BRX-TH 6648, CALT-TH 2019-008, UFIFT-QG-19-02 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an improved version of our original cosmological model to explain
the current phase of cosmological acceleration without resorting to a
cosmological constant or any other mass scale. Like the original, this
phenomenological approach is based on an effective quantum gravitational
action, but now depends on ... | [
{
"created": "Thu, 21 Feb 2019 14:44:22 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Jun 2019 23:55:19 GMT",
"version": "v2"
}
] | 2019-06-19 | [
[
"Deser",
"S.",
""
],
[
"Woodard",
"R. P.",
""
]
] | We present an improved version of our original cosmological model to explain the current phase of cosmological acceleration without resorting to a cosmological constant or any other mass scale. Like the original, this phenomenological approach is based on an effective quantum gravitational action, but now depends on th... |
gr-qc/0307026 | V. Minkevich Albert | A. V. Minkevich | Regular inflationary cosmology and gauge theories of gravitation | 12 pages, LaTeX2e; some corrections and additions are made without
changing obtained results | Nonlin.Phenom.Complex Syst.6:824-832,2003 | null | null | gr-qc astro-ph hep-th | null | Cosmological equations for homogeneous isotropic models filled by scalar
fields and ultrarelativistic matter are investigated in the framework of gauge
theories of gravity. Regular inflationary cosmological models of flat, closed
and open type with dominating ultrarelativistic matter at a bounce are
discussed. It is ... | [
{
"created": "Mon, 7 Jul 2003 09:07:38 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jul 2003 16:59:30 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Jul 2003 08:35:13 GMT",
"version": "v3"
},
{
"created": "Tue, 30 Sep 2003 08:53:52 GMT",
"version": "v4"
},
{
"cr... | 2014-11-17 | [
[
"Minkevich",
"A. V.",
""
]
] | Cosmological equations for homogeneous isotropic models filled by scalar fields and ultrarelativistic matter are investigated in the framework of gauge theories of gravity. Regular inflationary cosmological models of flat, closed and open type with dominating ultrarelativistic matter at a bounce are discussed. It is sh... |
gr-qc/0105048 | Marcelo J. Reboucas | G.I. Gomero, M.J. Reboucas, A.F.F. Teixeira | Signature for the Shape of the Universe | 11 pages, 3 figures, LaTeX2e. This paper is a direct ancestor of
gr-qc/9911049, put in gr-qc archive to make it more accessible | Int.J.Mod.Phys. D9 (2000) 687-696 | 10.1142/S021827180000075X | null | gr-qc astro-ph math-ph math.MP | null | If the universe has a nontrivial shape (topology) the sky may show multiple
correlated images of cosmic objects. These correlations can be couched in terms
of distance correlations. We propose a statistical quantity which can be used
to reveal the topological signature of any Robertson-Walker (RW) spacetime with
nont... | [
{
"created": "Tue, 15 May 2001 00:22:53 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Gomero",
"G. I.",
""
],
[
"Reboucas",
"M. J.",
""
],
[
"Teixeira",
"A. F. F.",
""
]
] | If the universe has a nontrivial shape (topology) the sky may show multiple correlated images of cosmic objects. These correlations can be couched in terms of distance correlations. We propose a statistical quantity which can be used to reveal the topological signature of any Robertson-Walker (RW) spacetime with nontri... |
1406.6334 | Otakar Svitek | O. Svitek and T. Tahamtan | Ultrarelativistic boost with scalar field | null | Gen. Rel. Grav. 48 (2016) 22 | 10.1007/s10714-016-2021-x | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We present the ultrarelativistic boost of the general global monopole
solution which is parametrized by mass and deficit solid angle. The problem is
addressed from two different perspectives. In the first one the primary object
for performing the boost is the metric tensor while in the second one the
energy momentum ... | [
{
"created": "Tue, 24 Jun 2014 18:53:16 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Feb 2016 10:05:49 GMT",
"version": "v2"
}
] | 2016-02-03 | [
[
"Svitek",
"O.",
""
],
[
"Tahamtan",
"T.",
""
]
] | We present the ultrarelativistic boost of the general global monopole solution which is parametrized by mass and deficit solid angle. The problem is addressed from two different perspectives. In the first one the primary object for performing the boost is the metric tensor while in the second one the energy momentum te... |
2310.01460 | Mikko Partanen | Mikko Partanen, Jukka Tulkki | Gravity based on internal symmetry of quantum fields | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The Standard Model of particle physics describes electromagnetic, weak, and
strong interactions, which are three of the four known fundamental forces of
nature. The unification of the fourth interaction, gravity, with the Standard
Model has been challenging due to incompatibilities of the underlying theories
- genera... | [
{
"created": "Mon, 2 Oct 2023 13:46:05 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Oct 2023 11:51:56 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Oct 2023 15:08:11 GMT",
"version": "v3"
},
{
"created": "Mon, 30 Oct 2023 15:39:58 GMT",
"version": "v4"
},
{
"cre... | 2024-03-29 | [
[
"Partanen",
"Mikko",
""
],
[
"Tulkki",
"Jukka",
""
]
] | The Standard Model of particle physics describes electromagnetic, weak, and strong interactions, which are three of the four known fundamental forces of nature. The unification of the fourth interaction, gravity, with the Standard Model has been challenging due to incompatibilities of the underlying theories - general ... |
gr-qc/0604125 | Nikodem Poplawski | Nikodem J. Poplawski | Gauge invariance and massive torsionic scalar field | 5 pages; minor changes and 1 reference added | null | null | null | gr-qc | null | The Hojman-Rosenbaum-Ryan-Shepley dynamical theory of torsion preserves local
gauge invariance of electrodynamics and makes minimal coupling compatible with
torsion. It also allows propagation of torsion in vacuum. It is known that
implications of this model disagree with the Eotvos-Dicke-Braginsky solar tests
of the... | [
{
"created": "Fri, 28 Apr 2006 09:50:35 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Aug 2006 15:44:19 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Poplawski",
"Nikodem J.",
""
]
] | The Hojman-Rosenbaum-Ryan-Shepley dynamical theory of torsion preserves local gauge invariance of electrodynamics and makes minimal coupling compatible with torsion. It also allows propagation of torsion in vacuum. It is known that implications of this model disagree with the Eotvos-Dicke-Braginsky solar tests of the p... |
1909.09355 | Manuel Hohmann | Elena D. Emtsova, Manuel Hohmann | Post-Newtonian limit of scalar-torsion theories of gravity as analogue
to scalar-curvature theories | LaTeX, 17 pages, no figures; published version, references updated | Phys. Rev. D 101, 024017 (2020) | 10.1103/PhysRevD.101.024017 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a recently proposed class of extended teleparallel theories of
gravity, which entail a scalar field which is non-minimally coupled to the
torsion of a flat, metric-compatible connection. This class of scalar-torsion
theories of gravity is constructed in analogy to and as a direct extension of
the well-stu... | [
{
"created": "Fri, 20 Sep 2019 07:31:44 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Jan 2020 20:49:57 GMT",
"version": "v2"
}
] | 2020-01-24 | [
[
"Emtsova",
"Elena D.",
""
],
[
"Hohmann",
"Manuel",
""
]
] | We consider a recently proposed class of extended teleparallel theories of gravity, which entail a scalar field which is non-minimally coupled to the torsion of a flat, metric-compatible connection. This class of scalar-torsion theories of gravity is constructed in analogy to and as a direct extension of the well-studi... |
1902.09801 | Luc Blanchet | Luc Blanchet | Analyzing Gravitational Waves with General Relativity | 14 pages, 5 figures, Invited review article to appear in Comptes
Rendus de l'Acad\'emie des Sciences (Physique) | null | 10.1016/j.crhy.2019.02.004 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After a short review of prominent properties of gravitational waves and the
newly born gravitational astronomy, we focus on theoretical aspects. Analytic
approximation methods in general relativity have played a crucial role in the
recent discoveries of gravitational waves. They are used to build theoretical
template... | [
{
"created": "Tue, 26 Feb 2019 08:44:35 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Blanchet",
"Luc",
""
]
] | After a short review of prominent properties of gravitational waves and the newly born gravitational astronomy, we focus on theoretical aspects. Analytic approximation methods in general relativity have played a crucial role in the recent discoveries of gravitational waves. They are used to build theoretical template b... |
2404.02867 | Efra\'in Rojas Marcial | Efra\'in Rojas, G. Cruz and J.C. Natividad | Dark energy as a geometrical effect in geodetic brane gravity | 12 pages, 6 figures. The version that matches the published version
with some references added | Int. J. Mod. Phys. A 39, (2024) 2450069 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the framework of the modified geodetic brane gravity, conformed by the
Regge-Teitelboim model and enhanced with a linear term in the extrinsic
curvature of the brane, the possibility that under an FRW geometry this theory
emulates the so-called dark energy is discussed. The cosmological behavior of
this model ... | [
{
"created": "Wed, 3 Apr 2024 17:01:21 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Aug 2024 03:14:12 GMT",
"version": "v2"
}
] | 2024-08-02 | [
[
"Rojas",
"Efraín",
""
],
[
"Cruz",
"G.",
""
],
[
"Natividad",
"J. C.",
""
]
] | Within the framework of the modified geodetic brane gravity, conformed by the Regge-Teitelboim model and enhanced with a linear term in the extrinsic curvature of the brane, the possibility that under an FRW geometry this theory emulates the so-called dark energy is discussed. The cosmological behavior of this model di... |
1308.6106 | Ozgur Delice | Ahmet Baykal and \"Ozg\"ur Delice | Multi-Scalar-Tensor Equivalents for Modified Gravitational Actions | V1:17 pages in two column format, revtex; V2: 19 pages, an appendix
and references added, published version | Phys. Rev. D 88, 084041 (2013) | 10.1103/PhysRevD.88.084041 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general scheme of constructing scalar-tensor equivalents to modified
gravitational actions are studied using the algebra of exterior differential
forms and the first order formalism that allows an independent connection and
coframe. By introducing appropriate constraints on the connection,
pseudo-Riemannian cases a... | [
{
"created": "Wed, 28 Aug 2013 09:27:35 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Oct 2013 15:28:54 GMT",
"version": "v2"
}
] | 2013-10-31 | [
[
"Baykal",
"Ahmet",
""
],
[
"Delice",
"Özgür",
""
]
] | A general scheme of constructing scalar-tensor equivalents to modified gravitational actions are studied using the algebra of exterior differential forms and the first order formalism that allows an independent connection and coframe. By introducing appropriate constraints on the connection, pseudo-Riemannian cases as ... |
1507.07687 | Diego Blas | Diego Blas | Lorentz violation in gravity | 4 pages. To appear in the proceedings of the 2015 Rencontres de
Moriond, "Gravitation: 100 years after GR" | null | null | CERN-PH-TH-2015-143 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The study of gravitational theories without Lorentz invariance plays an
important role to understand different aspects of gravitation. In this short
contribution we will describe the construction, main advantages and some
phenomenological considerations associated with the presence of a preferred
time direction.
| [
{
"created": "Tue, 28 Jul 2015 08:48:06 GMT",
"version": "v1"
}
] | 2015-07-29 | [
[
"Blas",
"Diego",
""
]
] | The study of gravitational theories without Lorentz invariance plays an important role to understand different aspects of gravitation. In this short contribution we will describe the construction, main advantages and some phenomenological considerations associated with the presence of a preferred time direction. |
1705.09490 | Xiang-Hua Zhai | Xiang-hua Zhai, Rui-hui Lin, Chao-jun Feng, and Xin-zhou Li | Action functional of the Cardassian universe | 7 pages, 3 figures | Physical Review D 95, 104030 (2017) | 10.1103/PhysRevD.95.104030 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that the Cardassian universe is successful in describing the
accelerated expansion of the universe, but its dynamical equations are hard to
get from the action principle. In this paper, we establish the connection
between the Cardassian universe and $f(T, \mathcal{T})$ gravity, where $T$ is
the torsion sc... | [
{
"created": "Fri, 26 May 2017 09:13:54 GMT",
"version": "v1"
}
] | 2017-05-31 | [
[
"Zhai",
"Xiang-hua",
""
],
[
"Lin",
"Rui-hui",
""
],
[
"Feng",
"Chao-jun",
""
],
[
"Li",
"Xin-zhou",
""
]
] | It is known that the Cardassian universe is successful in describing the accelerated expansion of the universe, but its dynamical equations are hard to get from the action principle. In this paper, we establish the connection between the Cardassian universe and $f(T, \mathcal{T})$ gravity, where $T$ is the torsion scal... |
gr-qc/0111101 | Marcelo S. Berman | Marcelo S. Berman and Luis A. Trevisan | Estimate on the deceleration parameter in a Universe with variable fine
structure constant | Rejected by Physical Review D15. Date of receipt (about) 25 August
2001.New version send to Physics Letters A | null | null | null | gr-qc | null | We determine a cosmological model that include a positive acceleration of the
Universe and a time decreasing fine structure constant. The present day
deceleration parameter is estimated by us, according to our model and the
available experimental data .
| [
{
"created": "Wed, 28 Nov 2001 17:29:48 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Dec 2001 21:34:31 GMT",
"version": "v2"
},
{
"created": "Thu, 31 Jan 2002 00:08:58 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Berman",
"Marcelo S.",
""
],
[
"Trevisan",
"Luis A.",
""
]
] | We determine a cosmological model that include a positive acceleration of the Universe and a time decreasing fine structure constant. The present day deceleration parameter is estimated by us, according to our model and the available experimental data . |
gr-qc/0011015 | Bertfried Fauser | Bertfried Fauser | Projective Relativity: Present Status and Outlook | 12 pages | Gen.Rel.Grav. 33 (2001) 875-887 | 10.1023/A:1010259908844 | null | gr-qc | null | We give a critical analysis of projective relativity theory. Examining
Kaluza's own intention and the following development by Klein, Jordan, Pauli,
Thiry, Ludwig and others, we conclude that projective relativity was abused in
its own terms. Much more in the case of newer higher dimensional Kaluza--Klein
theories wi... | [
{
"created": "Sat, 4 Nov 2000 21:17:14 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Fauser",
"Bertfried",
""
]
] | We give a critical analysis of projective relativity theory. Examining Kaluza's own intention and the following development by Klein, Jordan, Pauli, Thiry, Ludwig and others, we conclude that projective relativity was abused in its own terms. Much more in the case of newer higher dimensional Kaluza--Klein theories with... |
gr-qc/9707042 | Sebastiaan de Haro Olle | S. de Haro (University of Utrecht) | Non-Commutative Black Hole Algebra and String Theory from Gravity | 19 pages, LaTeX. Journal reference corrected | Class.Quant.Grav. 15 (1998) 519-535 | 10.1088/0264-9381/15/3/006 | null | gr-qc hep-th | null | We generalize the action found by 't Hooft, which describes the gravitational
interaction between ingoing and outgoing particles in the neighbourhood of a
black hole. The effect of this back-reaction is that of a shock wave, and it
provides a mechanism for recovering information about the momentum of the
incoming par... | [
{
"created": "Fri, 18 Jul 1997 15:57:14 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Jan 1998 11:13:10 GMT",
"version": "v2"
},
{
"created": "Mon, 16 Mar 1998 10:37:11 GMT",
"version": "v3"
}
] | 2009-10-30 | [
[
"de Haro",
"S.",
"",
"University of Utrecht"
]
] | We generalize the action found by 't Hooft, which describes the gravitational interaction between ingoing and outgoing particles in the neighbourhood of a black hole. The effect of this back-reaction is that of a shock wave, and it provides a mechanism for recovering information about the momentum of the incoming parti... |
gr-qc/0611093 | Pankaj Jain | Deshdeep Sahdev, Ravishankar Sundararaman, Moninder Singh Modgil | The G\"odel Universe: A Practical Travel Guide | 25 pages, 12 figures | null | null | null | gr-qc | null | We study the G\"odel universe through worldlines associated with motion at
constant speed and constant acceleration orthogonal to the instantaneous
velocity (WSAs). We show that these worldlines can be used to access every
region -- both spatial and temporal -- of the space-time. We capture the
insights they accord i... | [
{
"created": "Fri, 17 Nov 2006 05:52:52 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sahdev",
"Deshdeep",
""
],
[
"Sundararaman",
"Ravishankar",
""
],
[
"Modgil",
"Moninder Singh",
""
]
] | We study the G\"odel universe through worldlines associated with motion at constant speed and constant acceleration orthogonal to the instantaneous velocity (WSAs). We show that these worldlines can be used to access every region -- both spatial and temporal -- of the space-time. We capture the insights they accord in ... |
0807.4670 | Y. Ben-Aryeh | Yacob Ben-Aryeh | Harmonic oscillator with time-dependent effective-mass and frequency
with a possible application to 'chirped tidal' gravitational waves forces
affecting interferometric detectors | 18 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The general theory of time-dependent frequency and time-dependent mass
('effective mass') is described.The general theory for time-dependent harmonic-
oscillator is applied in the present research for studying certain quantum
effects in the interferometers for detecting gravitational waves.When an
astronomical binary... | [
{
"created": "Tue, 29 Jul 2008 14:05:13 GMT",
"version": "v1"
}
] | 2008-07-30 | [
[
"Ben-Aryeh",
"Yacob",
""
]
] | The general theory of time-dependent frequency and time-dependent mass ('effective mass') is described.The general theory for time-dependent harmonic- oscillator is applied in the present research for studying certain quantum effects in the interferometers for detecting gravitational waves.When an astronomical binary s... |
gr-qc/0208029 | Kentaro Somiya | K. Somiya | New Photodetection Method Using Unbalanced Sidebands for Squeezed
Quantum Noise in Gravitational Wave Interferometer | 9 pages, 5 figures | Phys.Rev. D67 (2003) 122001 | 10.1103/PhysRevD.67.122001 | null | gr-qc | null | Homodyne detection is one of the ways to circumvent the standard quantum
limit for a gravitational wave detector. In this paper it will be shown that
the same quantum-non-demolition effect using homodyne detection can be realized
by heterodyne detection with unbalanced RF sidebands. Furthermore, a broadband
quantum-n... | [
{
"created": "Tue, 13 Aug 2002 09:41:12 GMT",
"version": "v1"
}
] | 2020-07-06 | [
[
"Somiya",
"K.",
""
]
] | Homodyne detection is one of the ways to circumvent the standard quantum limit for a gravitational wave detector. In this paper it will be shown that the same quantum-non-demolition effect using homodyne detection can be realized by heterodyne detection with unbalanced RF sidebands. Furthermore, a broadband quantum-non... |
0706.0928 | Dinesh Singh | Dinesh Singh | An Analytic Perturbation Approach for Classical Spinning Particle
Dynamics | 14 pages, no figures; typo corrected in v3; accepted for publication
in General Relativity and Gravitation as part of Bahram Mashhoon's 60th
birthday festschrift | Gen.Rel.Grav.40:1179-1192,2008 | 10.1007/s10714-007-0597-x | null | gr-qc astro-ph | null | A perturbation method to analytically describe the dynamics of a classical
spinning particle, based on the Mathisson-Papapetrou-Dixon (MPD) equations of
motion, is presented. By a power series expansion with respect to the
particle's spin magnitude, it is shown how to obtain in general form an
analytic representation... | [
{
"created": "Thu, 7 Jun 2007 16:01:01 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Jul 2007 17:09:47 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Apr 2008 15:13:10 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Singh",
"Dinesh",
""
]
] | A perturbation method to analytically describe the dynamics of a classical spinning particle, based on the Mathisson-Papapetrou-Dixon (MPD) equations of motion, is presented. By a power series expansion with respect to the particle's spin magnitude, it is shown how to obtain in general form an analytic representation o... |
1808.07521 | Leonardo Ort\'iz | Leonardo Ort\'iz and Nora Bret\'on | Aspects of the BTZ black hole interacting with fields | 17 pages | null | 10.1142/S0217732319502511 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that there is no superradiance for the Dirac field in the rotating
BTZ black hole if the field vanishes at infinity. Then we outline the
calculation of the expression for the renormalized energy-momentum tensor, the
effective action as well as the heat kernel for the Dirac field for the BTZ
black hole. Finall... | [
{
"created": "Wed, 22 Aug 2018 18:50:11 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Sep 2018 17:27:12 GMT",
"version": "v2"
}
] | 2019-10-23 | [
[
"Ortíz",
"Leonardo",
""
],
[
"Bretón",
"Nora",
""
]
] | We show that there is no superradiance for the Dirac field in the rotating BTZ black hole if the field vanishes at infinity. Then we outline the calculation of the expression for the renormalized energy-momentum tensor, the effective action as well as the heat kernel for the Dirac field for the BTZ black hole. Finally ... |
2003.06756 | Christos Tzounis Dr. | Shohreh Abdolrahimi, Robert B. Mann, and Christos Tzounis | A Distorted Black Ring | 16 pages and 7 figures. arXiv admin note: text overlap with
arXiv:hep-th/0110258 by other authors | Phys. Rev. D 101, 104002 (2020) | 10.1103/PhysRevD.101.104002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate how a static and neutral distribution of external matter
distorts a 5-dimensional static black ring. We obtain a general expression for
the distorted metric in terms of the background metric functions and the
distortion fields, and find a multipole expansion for the latter. We
demonstrate that the grav... | [
{
"created": "Sun, 15 Mar 2020 05:08:33 GMT",
"version": "v1"
},
{
"created": "Thu, 7 May 2020 23:32:23 GMT",
"version": "v2"
}
] | 2020-05-13 | [
[
"Abdolrahimi",
"Shohreh",
""
],
[
"Mann",
"Robert B.",
""
],
[
"Tzounis",
"Christos",
""
]
] | We investigate how a static and neutral distribution of external matter distorts a 5-dimensional static black ring. We obtain a general expression for the distorted metric in terms of the background metric functions and the distortion fields, and find a multipole expansion for the latter. We demonstrate that the gravit... |
gr-qc/9506027 | Markus Heusler | O. Brodbeck, M. Heusler and N. Straumann | Pulsation of Spherically Symmetric Systems in General Relativity | 21 pages, latex, no figures | Phys.Rev. D53 (1996) 754-761 | 10.1103/PhysRevD.53.754 | ZU-TH-95-9 | gr-qc | null | The pulsation equations for spherically symmetric black hole and soliton
solutions are brought into a standard form. The formulae apply to a large class
of field theoretical matter models and can easily be worked out for specific
examples. The close relation to the energy principle in terms of the second
variation of... | [
{
"created": "Thu, 15 Jun 1995 16:28:04 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Brodbeck",
"O.",
""
],
[
"Heusler",
"M.",
""
],
[
"Straumann",
"N.",
""
]
] | The pulsation equations for spherically symmetric black hole and soliton solutions are brought into a standard form. The formulae apply to a large class of field theoretical matter models and can easily be worked out for specific examples. The close relation to the energy principle in terms of the second variation of t... |
gr-qc/0509026 | Roman Konoplya | R. A. Konoplya | Massive vector field perturbations in the Schwarzschild background:
stability and quasinormal spectrum | 10 pages, 6 figures. Misprints in Eq. 13 are corrected | Phys.Rev. D73 (2006) 024009 | 10.1103/PhysRevD.73.024009 | null | gr-qc | null | We consider the perturbations of the massive vector field around
Schwarzschild black hole, (generally, with non-vanishing $\Lambda$ - term). The
monopole massive vector perturbation equations can be reduced to a single
wave-like equation. We have proved the stability against these perturbations
and investigated the q... | [
{
"created": "Wed, 7 Sep 2005 21:56:23 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Nov 2005 18:03:41 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Jan 2006 12:03:31 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Konoplya",
"R. A.",
""
]
] | We consider the perturbations of the massive vector field around Schwarzschild black hole, (generally, with non-vanishing $\Lambda$ - term). The monopole massive vector perturbation equations can be reduced to a single wave-like equation. We have proved the stability against these perturbations and investigated the qua... |
1909.07129 | Cosimo Bambi | Hrishikesh Chakrabarty, Ahmadjon Abdujabbarov, Daniele Malafarina,
Cosimo Bambi | A toy model for a baby universe inside a black hole | 9 pages, 6 figures. v2: refereed version | Eur. Phys. J. C (2020) 80:373 | 10.1140/epjc/s10052-020-7964-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a dynamical toy model for an expanding universe inside a black
hole. The model is built by matching a spherically symmetric collapsing matter
cloud to an expanding Friedmann-Robertson-Walker universe through a phase
transition that occurs in the quantum-gravity dominated region, here modeled
with semi-clas... | [
{
"created": "Mon, 16 Sep 2019 11:27:46 GMT",
"version": "v1"
},
{
"created": "Sun, 10 May 2020 03:38:30 GMT",
"version": "v2"
}
] | 2020-05-12 | [
[
"Chakrabarty",
"Hrishikesh",
""
],
[
"Abdujabbarov",
"Ahmadjon",
""
],
[
"Malafarina",
"Daniele",
""
],
[
"Bambi",
"Cosimo",
""
]
] | We present a dynamical toy model for an expanding universe inside a black hole. The model is built by matching a spherically symmetric collapsing matter cloud to an expanding Friedmann-Robertson-Walker universe through a phase transition that occurs in the quantum-gravity dominated region, here modeled with semi-classi... |
1106.5027 | Liu Zhao | Liu Zhao | Note on a class of anisotropic Einstein metrics | 6 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A class of anisotropic Einstein metrics is presented. These metrics are axial
symmetric and contains an anisotropy parameter $\alpha$, which is identified as
the amplitude of the proper acceleration of the origin, thus explaining the
ellipsoid shape of the horizon.
| [
{
"created": "Fri, 24 Jun 2011 17:52:48 GMT",
"version": "v1"
}
] | 2011-06-27 | [
[
"Zhao",
"Liu",
""
]
] | A class of anisotropic Einstein metrics is presented. These metrics are axial symmetric and contains an anisotropy parameter $\alpha$, which is identified as the amplitude of the proper acceleration of the origin, thus explaining the ellipsoid shape of the horizon. |
gr-qc/9407011 | Tevian Dray | Stuart Boersma and Tevian Dray | Parametric Manifolds I: Extrinsic Approach | Plain TeX, 21 pages, no figures | J.Math.Phys. 36 (1995) 1378-1393 | 10.1063/1.531127 | null | gr-qc dg-ga math.DG | null | A parametric manifold can be viewed as the manifold of orbits of a (regular)
foliation of a manifold by means of a family of curves. If the foliation is
hypersurface orthogonal, the parametric manifold is equivalent to the
1-parameter family of hypersurfaces orthogonal to the curves, each of which
inherits a metric a... | [
{
"created": "Tue, 12 Jul 1994 21:36:59 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Boersma",
"Stuart",
""
],
[
"Dray",
"Tevian",
""
]
] | A parametric manifold can be viewed as the manifold of orbits of a (regular) foliation of a manifold by means of a family of curves. If the foliation is hypersurface orthogonal, the parametric manifold is equivalent to the 1-parameter family of hypersurfaces orthogonal to the curves, each of which inherits a metric and... |
0706.0804 | Abiy Tekola A | Abiy G. Tekola (Physics department, University of Cape Town) | Spherically symmeteric dark energy structure in the context of Chaplygin
gas model | null | null | null | null | gr-qc | null | Spherically symmetric dark energy structures are investigated in the
framework of a generalized Chaplygin gas (GCG), which has an equation of state
of the form $P = - A/\rho^{\alpha}} $. We also study these in a modified GCG
equation of state, which includes a matter term, i.e. $P = \sigma^{2} \rho -
A/\rho^{\alpha}$... | [
{
"created": "Wed, 6 Jun 2007 11:10:13 GMT",
"version": "v1"
}
] | 2007-06-07 | [
[
"Tekola",
"Abiy G.",
"",
"Physics department, University of Cape Town"
]
] | Spherically symmetric dark energy structures are investigated in the framework of a generalized Chaplygin gas (GCG), which has an equation of state of the form $P = - A/\rho^{\alpha}} $. We also study these in a modified GCG equation of state, which includes a matter term, i.e. $P = \sigma^{2} \rho - A/\rho^{\alpha}$. ... |
1111.4943 | Llu\'is Bel | Ll. Bel | Global SSS space-time models | 9 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss Global Static Spherically Symmetric space-time models of mass $m$
with regular sources at the origin and asymptotically Minkowskian behavior at
infinity; the interior model and the exterior one being matched at the radius
$R$ of the source in the sense of Lichnerowicz. The global models depend in
general o... | [
{
"created": "Mon, 21 Nov 2011 17:24:29 GMT",
"version": "v1"
}
] | 2011-11-22 | [
[
"Bel",
"Ll.",
""
]
] | We discuss Global Static Spherically Symmetric space-time models of mass $m$ with regular sources at the origin and asymptotically Minkowskian behavior at infinity; the interior model and the exterior one being matched at the radius $R$ of the source in the sense of Lichnerowicz. The global models depend in general on ... |
gr-qc/9806052 | David Garfinkle | David Garfinkle and Ken Meyer | Scale invariance and critical gravitational collapse | 7 pages, 3 figures, Revtex, discussion modified to clarify
presentation | Phys. Rev. D 59, 064003 (1999) | 10.1103/PhysRevD.59.064003 | null | gr-qc | null | We examine ways to write the Choptuik critical solution as the evolution of
scale invariant variables. It is shown that a system of scale invariant
variables proposed by one of the authors does not evolve periodically in the
Choptuik critical solution. We find a different system, based on maximal
slicing. This system... | [
{
"created": "Wed, 10 Jun 1998 22:54:40 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Aug 1998 20:42:35 GMT",
"version": "v2"
}
] | 2016-08-25 | [
[
"Garfinkle",
"David",
""
],
[
"Meyer",
"Ken",
""
]
] | We examine ways to write the Choptuik critical solution as the evolution of scale invariant variables. It is shown that a system of scale invariant variables proposed by one of the authors does not evolve periodically in the Choptuik critical solution. We find a different system, based on maximal slicing. This system d... |
1405.7670 | Cecilia Bejarano | Cecilia Bejarano, Ernesto F. Eiroa, Claudio Simeone | General formalism for the stability of thin-shell wormholes in 2+1
dimensions | 14 pages, 7 figures; v2: improved version, new references added | Eur. Phys. J. C (2014) 74:3015 | 10.1140/epjc/s10052-014-3015-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we theoretically construct circular thin-shell wormholes in a
2+1 dimensional spacetime. The construction is symmetric with respect to the
throat. We present a general formalism for the study of the mechanical
stability under perturbations preserving the circular symmetry of the
configurations, adopti... | [
{
"created": "Thu, 29 May 2014 19:35:33 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Sep 2014 23:00:10 GMT",
"version": "v2"
}
] | 2014-09-11 | [
[
"Bejarano",
"Cecilia",
""
],
[
"Eiroa",
"Ernesto F.",
""
],
[
"Simeone",
"Claudio",
""
]
] | In this article we theoretically construct circular thin-shell wormholes in a 2+1 dimensional spacetime. The construction is symmetric with respect to the throat. We present a general formalism for the study of the mechanical stability under perturbations preserving the circular symmetry of the configurations, adopting... |
0905.0614 | Pedro Labra\~na | Sergio del Campo, Ramon Herrera, Pedro Labrana | On the Stability of Jordan-Brans-Dicke Static Universe | 24 pages, 2 figures, typos corrected, some improvements in section 4
and comments added in conclusions. References added. Accepted for publication
in JCAP | JCAP 0907:006,2009 | 10.1088/1475-7516/2009/07/006 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study the stability of the Jordan-Brans-Dicke (JBD) static
universe. This is motivated by the possibility that the universe might have
started out in an asymptotically JBD static state, in the context of the so
called emergent universe scenario. We extent our previous results on stability
of JBD stati... | [
{
"created": "Tue, 5 May 2009 14:27:40 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Jun 2009 22:38:19 GMT",
"version": "v2"
}
] | 2009-07-22 | [
[
"del Campo",
"Sergio",
""
],
[
"Herrera",
"Ramon",
""
],
[
"Labrana",
"Pedro",
""
]
] | In this work we study the stability of the Jordan-Brans-Dicke (JBD) static universe. This is motivated by the possibility that the universe might have started out in an asymptotically JBD static state, in the context of the so called emergent universe scenario. We extent our previous results on stability of JBD static ... |
gr-qc/0507017 | Petr Hajicek | M. Ambrus and P. Hajicek | Quantum superposition principle and gravitational collapse: Scattering
times for spherical shells | 30 pages and 5 figures; the post-referee version: shortened and some
formulations improved; to be published in Physical Review | Phys.Rev. D72 (2005) 064025 | 10.1103/PhysRevD.72.064025 | null | gr-qc hep-th | null | A quantum theory of spherically symmetric thin shells of null dust and their
gravitational field is studied. In Nucl. Phys. 603 (2001) 515 (hep-th/0007005),
it has been shown how superpositions of quantum states with different
geometries can lead to a solution of the singularity problem and black hole
information par... | [
{
"created": "Tue, 5 Jul 2005 13:08:04 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Aug 2005 13:21:27 GMT",
"version": "v2"
}
] | 2013-05-29 | [
[
"Ambrus",
"M.",
""
],
[
"Hajicek",
"P.",
""
]
] | A quantum theory of spherically symmetric thin shells of null dust and their gravitational field is studied. In Nucl. Phys. 603 (2001) 515 (hep-th/0007005), it has been shown how superpositions of quantum states with different geometries can lead to a solution of the singularity problem and black hole information parad... |
2001.01137 | Shuang Yu | Shuang Yu, Changjun Gao | An exact black hole spacetime with scalar field and its shadow together
with quasinormal modes | 9 pages, 4 figures | Modern Physics Letters A 35, 2050256 (2020) | 10.1142/S0217732320502569 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find an exact black hole solution with a minimally coupled scalar field.
The corresponding spacetime has two horizons and one of the them is the black
hole event horizon and the other is the cosmic horizon. In this sense, the
solution is analogous to the Schwarzschild-de Sitter (or anti-de Sitter)
spacetime. We in... | [
{
"created": "Sat, 4 Jan 2020 22:55:51 GMT",
"version": "v1"
}
] | 2020-10-13 | [
[
"Yu",
"Shuang",
""
],
[
"Gao",
"Changjun",
""
]
] | We find an exact black hole solution with a minimally coupled scalar field. The corresponding spacetime has two horizons and one of the them is the black hole event horizon and the other is the cosmic horizon. In this sense, the solution is analogous to the Schwarzschild-de Sitter (or anti-de Sitter) spacetime. We inve... |
2401.14833 | Sohan Kumar Jha | Himangshu Barman, Ahmad Al-Badawi, Sohan Kumar Jha, and Anisur Rahaman | Accretion, greybody factor, quasinormal modes, power spectrum, sparsity
of Hawking radiation, and weak gravitational lensing of a minimum measurable
length inspired Schwarzchild black hole | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this manuscript, we delve into an analytic and numerical probe of shadow
with different accretion models, quasinormal modes, Hawking radiation, and
gravitational lensing to study observational impacts of quantum effect
introduced throughh linear-quadratic GUP(LQG). Our investigation reveals that
the shadows of LQG... | [
{
"created": "Fri, 26 Jan 2024 13:01:55 GMT",
"version": "v1"
}
] | 2024-01-29 | [
[
"Barman",
"Himangshu",
""
],
[
"Al-Badawi",
"Ahmad",
""
],
[
"Jha",
"Sohan Kumar",
""
],
[
"Rahaman",
"Anisur",
""
]
] | In this manuscript, we delve into an analytic and numerical probe of shadow with different accretion models, quasinormal modes, Hawking radiation, and gravitational lensing to study observational impacts of quantum effect introduced throughh linear-quadratic GUP(LQG). Our investigation reveals that the shadows of LQG m... |
1309.7011 | Frans Klinkhamer | F.R. Klinkhamer | A new type of nonsingular black-hole solution in general relativity | 20 pages; v6: published version. arXiv admin note: text overlap with
arXiv:1305.2875 | Mod. Phys. Lett. A 29, 1430018 (2014) | 10.1142/S0217732314300183 | KA-TP-25-2013 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Certain exact solutions of the Einstein field equations over
nonsimply-connected manifolds are reviewed. These solutions are spherically
symmetric and have no curvature singularity. They provide a regularization of
the standard Schwarzschild solution with a curvature singularity at the center.
Spherically symmetric c... | [
{
"created": "Thu, 26 Sep 2013 18:48:19 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Oct 2013 18:27:47 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Nov 2013 19:52:25 GMT",
"version": "v3"
},
{
"created": "Wed, 12 Feb 2014 10:13:12 GMT",
"version": "v4"
},
{
"cr... | 2015-06-17 | [
[
"Klinkhamer",
"F. R.",
""
]
] | Certain exact solutions of the Einstein field equations over nonsimply-connected manifolds are reviewed. These solutions are spherically symmetric and have no curvature singularity. They provide a regularization of the standard Schwarzschild solution with a curvature singularity at the center. Spherically symmetric col... |
2402.08883 | Nicholas Loutrel | Nicholas Loutrel, Sajal Mukherjee, Andrea Maselli, and Paolo Pani | Analytical model of precessing binaries using post-Newtonian theory in
the extreme mass-ratio limit I: General Formalism | 27 pages, 10 figures, some clarification and new plot of the
dephasing due to primary spin-orbit precession | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a fully analytical waveform model for precessing binaries with
arbitrary spin vectors using post-Newtonian theory in the extreme mass-ratio
limit and a hierarchical multi-scale analysis. Although the post-Newtonian
series poorly converges in this limit, our results can be used to estimate how
precession af... | [
{
"created": "Wed, 14 Feb 2024 01:15:40 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Feb 2024 12:48:29 GMT",
"version": "v2"
}
] | 2024-02-29 | [
[
"Loutrel",
"Nicholas",
""
],
[
"Mukherjee",
"Sajal",
""
],
[
"Maselli",
"Andrea",
""
],
[
"Pani",
"Paolo",
""
]
] | We develop a fully analytical waveform model for precessing binaries with arbitrary spin vectors using post-Newtonian theory in the extreme mass-ratio limit and a hierarchical multi-scale analysis. Although the post-Newtonian series poorly converges in this limit, our results can be used to estimate how precession affe... |
gr-qc/9706051 | Jorma Louko | John L. Friedman, Jorma Louko, and Stephen N. Winters-Hilt | Reduced phase space formalism for spherically symmetric geometry with a
massive dust shell | 36 pages, REVTeX v3.1 with amsfonts. (References updated; minor typos
corrected.) | Phys.Rev.D56:7674-7691,1997 | 10.1103/PhysRevD.56.7674 | PP97-120, WISC-MILW-97-TH-11 | gr-qc | null | We perform a Hamiltonian reduction of spherically symmetric Einstein gravity
with a thin dust shell of positive rest mass. Three spatial topologies are
considered: Euclidean (R^3), Kruskal (S^2 x R), and the spatial topology of a
diametrically identified Kruskal (RP^3 - {a point at infinity}). For the
Kruskal and RP^... | [
{
"created": "Mon, 16 Jun 1997 22:06:56 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Jul 1997 01:50:37 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Dec 1997 10:22:14 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Friedman",
"John L.",
""
],
[
"Louko",
"Jorma",
""
],
[
"Winters-Hilt",
"Stephen N.",
""
]
] | We perform a Hamiltonian reduction of spherically symmetric Einstein gravity with a thin dust shell of positive rest mass. Three spatial topologies are considered: Euclidean (R^3), Kruskal (S^2 x R), and the spatial topology of a diametrically identified Kruskal (RP^3 - {a point at infinity}). For the Kruskal and RP^3 ... |
2210.01133 | Vitor Cardoso | Vitor Cardoso, Kyriakos Destounis, Francisco Duque, Rodrigo Panosso
Macedo, Andrea Maselli | Gravitational waves from extreme-mass-ratio systems in astrophysical
environments | v2. Supplemental Material added, minor improvements. Accepted for
publication in Physical Review Letters | null | 10.1103/PhysRevLett.129.241103 | null | gr-qc astro-ph.HE physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish a generic, fully-relativistic formalism to study
gravitational-wave emission by extreme-mass-ratio systems in
spherically-symmetric, non-vacuum black-hole spacetimes. The potential
applications to astrophysical setups range from black holes accreting baryonic
matter to those within axionic clouds and dar... | [
{
"created": "Mon, 3 Oct 2022 18:00:01 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Nov 2022 14:31:26 GMT",
"version": "v2"
}
] | 2022-12-21 | [
[
"Cardoso",
"Vitor",
""
],
[
"Destounis",
"Kyriakos",
""
],
[
"Duque",
"Francisco",
""
],
[
"Macedo",
"Rodrigo Panosso",
""
],
[
"Maselli",
"Andrea",
""
]
] | We establish a generic, fully-relativistic formalism to study gravitational-wave emission by extreme-mass-ratio systems in spherically-symmetric, non-vacuum black-hole spacetimes. The potential applications to astrophysical setups range from black holes accreting baryonic matter to those within axionic clouds and dark ... |
gr-qc/9710087 | Marcelo Costa de Lima | M. C. Lima and I. Dami\~ao Soares | Gravitational Wave Emission and Mass Extraction from a Perturbed
Schwarzschild Black Hole (continue) | 26 pages, LaTex, no figures | null | null | CBPF-NF-046/97 | gr-qc | null | A relativistic model for the emission of gravitational waves from an
initially unperturbed Schwarzschild black hole, or spherical collapsing
configuration, is completely integrated. The model consists basically of
gravitational perturbations of the Robinson-Trautman type on the Schwarzschild
spacetime. In our scheme ... | [
{
"created": "Fri, 17 Oct 1997 19:39:37 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lima",
"M. C.",
""
],
[
"Soares",
"I. Damião",
""
]
] | A relativistic model for the emission of gravitational waves from an initially unperturbed Schwarzschild black hole, or spherical collapsing configuration, is completely integrated. The model consists basically of gravitational perturbations of the Robinson-Trautman type on the Schwarzschild spacetime. In our scheme of... |
2308.03943 | Gray Reid | Gray D. Reid, Matthew W. Choptuik | Universality in the Critical Collapse of the Einstein-Maxwell System | 16 pages, 14 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report on critical phenomena in the gravitational collapse of the
electromagnetic field in axisymmetry using cylindrical coordinates. We perform
detailed numerical simulations of four families of dipole and quadrupole
initial data fine-tuned to the onset of black hole formation. It has been
previously observed tha... | [
{
"created": "Mon, 7 Aug 2023 23:16:36 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Aug 2023 01:54:11 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Sep 2023 19:33:12 GMT",
"version": "v3"
}
] | 2023-09-28 | [
[
"Reid",
"Gray D.",
""
],
[
"Choptuik",
"Matthew W.",
""
]
] | We report on critical phenomena in the gravitational collapse of the electromagnetic field in axisymmetry using cylindrical coordinates. We perform detailed numerical simulations of four families of dipole and quadrupole initial data fine-tuned to the onset of black hole formation. It has been previously observed that ... |
2006.09202 | De-Chang Dai | De-Chang Dai, Djordje Minic, Dejan Stojkovic | On black holes as macroscopic quantum objects | 11 pages, 7 figures, accepted by Frontiers in Physics | Front. Phys. 10 (2022) 891977 | 10.3389/fphy.2022.891977 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relative flow of the Schwarzschild vs. the proper time during the
classical evolution of a collapsing shell in the Schwarzschild coordinates
practically forces us to interpret black hole formation as a highly non-local
quantum process in which a shell/anti-shell pair is created within the
incipient horizon, thus ... | [
{
"created": "Mon, 15 Jun 2020 11:34:12 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Oct 2020 07:28:21 GMT",
"version": "v2"
},
{
"created": "Fri, 1 Jul 2022 00:00:23 GMT",
"version": "v3"
}
] | 2022-07-15 | [
[
"Dai",
"De-Chang",
""
],
[
"Minic",
"Djordje",
""
],
[
"Stojkovic",
"Dejan",
""
]
] | The relative flow of the Schwarzschild vs. the proper time during the classical evolution of a collapsing shell in the Schwarzschild coordinates practically forces us to interpret black hole formation as a highly non-local quantum process in which a shell/anti-shell pair is created within the incipient horizon, thus ca... |
2010.07966 | Ramit Dey | Ramit Dey, Shauvik Biswas, Sumanta Chakraborty | Ergoregion instability and echoes for braneworld black holes: Scalar,
electromagnetic and gravitational perturbations | published version | Phys. Rev. D 103, 084019 (2021) | 10.1103/PhysRevD.103.084019 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of higher dimensional braneworld scenario, we have argued that
the occurrence of horizonless exotic compact objects, as an alternative to
classical black holes, are more natural. These exotic compact objects carry a
distinctive signature of the higher dimension, namely a tidal charge parameter,
inherit... | [
{
"created": "Thu, 15 Oct 2020 18:19:10 GMT",
"version": "v1"
},
{
"created": "Mon, 3 May 2021 21:05:41 GMT",
"version": "v2"
}
] | 2021-05-05 | [
[
"Dey",
"Ramit",
""
],
[
"Biswas",
"Shauvik",
""
],
[
"Chakraborty",
"Sumanta",
""
]
] | In the context of higher dimensional braneworld scenario, we have argued that the occurrence of horizonless exotic compact objects, as an alternative to classical black holes, are more natural. These exotic compact objects carry a distinctive signature of the higher dimension, namely a tidal charge parameter, inherited... |
1803.05911 | Dalia Eisa | N. A. Hussein, D.A.Eisa, T. A. S. Ibrahim | The solution of the Einstein equation in the interior of the black holes
by using arbitrary distribution functions | 20 pages and 10 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of this paper is to obtain the solution of the Einstein equation in
the interior of the black holes by using arbitrary distribution functions;
corresponding to Gaussian, Rayleigh, Maxwell-Boltzmann and non-Gaussian
distributions. Also we calculate the Hawking temperature, the mass and heat
capacity for cosmol... | [
{
"created": "Thu, 15 Mar 2018 17:54:29 GMT",
"version": "v1"
}
] | 2018-03-19 | [
[
"Hussein",
"N. A.",
""
],
[
"Eisa",
"D. A.",
""
],
[
"Ibrahim",
"T. A. S.",
""
]
] | The aim of this paper is to obtain the solution of the Einstein equation in the interior of the black holes by using arbitrary distribution functions; corresponding to Gaussian, Rayleigh, Maxwell-Boltzmann and non-Gaussian distributions. Also we calculate the Hawking temperature, the mass and heat capacity for cosmolog... |
2010.16359 | Sepideh Bakhoda | Sepideh Bakhoda, Hossein Shojaie and Thomas Thiemann | Asymptotically flat boundary conditions for the $U(1)^3$ model for
Euclidean Quantum Gravity | 11 pages | Universe 7 (2021) 3, 68 | 10.3390/universe7030068 | null | gr-qc hep-lat hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A generally covariant $U(1)^3$ gauge theory describing the $G_N \to 0$ limit
of Euclidean general relativity is an interesting test laboratory for general
relativity, specially because the algebra of the Hamiltonian and diffeomorphism
constraints of this limit is isomorphic to the algebra of the corresponding
constra... | [
{
"created": "Fri, 30 Oct 2020 16:31:49 GMT",
"version": "v1"
}
] | 2021-12-21 | [
[
"Bakhoda",
"Sepideh",
""
],
[
"Shojaie",
"Hossein",
""
],
[
"Thiemann",
"Thomas",
""
]
] | A generally covariant $U(1)^3$ gauge theory describing the $G_N \to 0$ limit of Euclidean general relativity is an interesting test laboratory for general relativity, specially because the algebra of the Hamiltonian and diffeomorphism constraints of this limit is isomorphic to the algebra of the corresponding constrain... |
0806.4007 | Masaru Shibata | Tetsuro Yamamoto, Masaru Shibata, Keisuke Taniguchi | Simulating coalescing compact binaries by a new code SACRA | PRD in press. Typos are corrected, and references are added | Phys.Rev.D78:064054,2008 | 10.1103/PhysRevD.78.064054 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report our new code (named SACRA) for numerical relativity simulations in
which an adaptive mesh refinement algorithm is implemented. In this code, the
Einstein equations are solved in the BSSN formalism with a fourth-order finite
differencing, and the hydrodynamic equations are solved by a third-order
high-resolu... | [
{
"created": "Wed, 25 Jun 2008 01:24:14 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Aug 2008 06:31:54 GMT",
"version": "v2"
}
] | 2009-02-23 | [
[
"Yamamoto",
"Tetsuro",
""
],
[
"Shibata",
"Masaru",
""
],
[
"Taniguchi",
"Keisuke",
""
]
] | We report our new code (named SACRA) for numerical relativity simulations in which an adaptive mesh refinement algorithm is implemented. In this code, the Einstein equations are solved in the BSSN formalism with a fourth-order finite differencing, and the hydrodynamic equations are solved by a third-order high-resoluti... |
1904.04434 | Theodore A. Jacobson | Ted Jacobson and Phuc Nguyen | Diffeomorphism invariance and the black hole information paradox | v2: 10 pages; modified comments on perturbative analysis, arguing
that nonperturbative effects appear to be essential | Phys. Rev. D 100, 046002 (2019) | 10.1103/PhysRevD.100.046002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that the resolution to the black hole information paradox lies in a
proper accounting of the implications of diffeomorphism invariance for the
Hilbert space and observables of quantum gravity. The setting of asymptotically
Anti-de Sitter spacetime is adopted for most of the paper, but in the framework
of can... | [
{
"created": "Tue, 9 Apr 2019 02:54:35 GMT",
"version": "v1"
},
{
"created": "Tue, 7 May 2019 16:49:52 GMT",
"version": "v2"
}
] | 2019-08-07 | [
[
"Jacobson",
"Ted",
""
],
[
"Nguyen",
"Phuc",
""
]
] | We argue that the resolution to the black hole information paradox lies in a proper accounting of the implications of diffeomorphism invariance for the Hilbert space and observables of quantum gravity. The setting of asymptotically Anti-de Sitter spacetime is adopted for most of the paper, but in the framework of canon... |
0709.4337 | Albert V. Minkevich | A. V. Minkevich | Gravitation, Cosmology and Space-Time Torsion | 10 pages | Annales de la Fondation Louis de Broglie, 32, no. 2-3, 253-266
(2007) | null | null | gr-qc | null | Poincar\'e gauge theory of gravity offers opportunities to solve some
principal problems of general relativity theory and modern cosmology. In the
frame of this theory the gravitational interaction can have the repulsion
character in the case of usual gravitating matter with positive values of
energy density and pres... | [
{
"created": "Thu, 27 Sep 2007 09:25:23 GMT",
"version": "v1"
}
] | 2009-08-22 | [
[
"Minkevich",
"A. V.",
""
]
] | Poincar\'e gauge theory of gravity offers opportunities to solve some principal problems of general relativity theory and modern cosmology. In the frame of this theory the gravitational interaction can have the repulsion character in the case of usual gravitating matter with positive values of energy density and pressu... |
0708.4196 | Marcus Ansorg | Marcus Ansorg, Herbert Pfister | A universal constraint between charge and rotation rate for degenerate
black holes surrounded by matter | 19 pages, 2 figures, replaced with published version | Class.Quant.Grav.25:035009,2008 | 10.1088/0264-9381/25/3/035009 | null | gr-qc | null | We consider stationary, axially and equatorially symmetric systems consisting
of a central rotating and charged degenerate black hole and surrounding matter.
We show that $a^2+Q^2=M^2$ always holds provided that a continuous sequence of
spacetimes can be identified, leading from the Kerr-Newman solution in
electrovac... | [
{
"created": "Thu, 30 Aug 2007 16:25:00 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Aug 2007 09:58:20 GMT",
"version": "v2"
},
{
"created": "Fri, 21 Sep 2007 07:58:45 GMT",
"version": "v3"
},
{
"created": "Thu, 24 Jan 2008 12:32:46 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Ansorg",
"Marcus",
""
],
[
"Pfister",
"Herbert",
""
]
] | We consider stationary, axially and equatorially symmetric systems consisting of a central rotating and charged degenerate black hole and surrounding matter. We show that $a^2+Q^2=M^2$ always holds provided that a continuous sequence of spacetimes can be identified, leading from the Kerr-Newman solution in electrovacuu... |
0708.0045 | Enrico Rodrigo | Enrico Rodrigo | Persistence of Induced Wormholes in Brane Worlds | 6 pages, 0 figures | null | null | null | gr-qc | null | Higher-dimensional black holes have long been considered within the context
of brane worlds. Recently, it was shown that the brane-world ethos also permits
the consideration of higher-dimensional wormholes. When such a wormhole,
preexisting in the bulk, impinges upon our universe, taken to be a
positive-tension 3-bra... | [
{
"created": "Tue, 31 Jul 2007 22:37:12 GMT",
"version": "v1"
}
] | 2007-08-02 | [
[
"Rodrigo",
"Enrico",
""
]
] | Higher-dimensional black holes have long been considered within the context of brane worlds. Recently, it was shown that the brane-world ethos also permits the consideration of higher-dimensional wormholes. When such a wormhole, preexisting in the bulk, impinges upon our universe, taken to be a positive-tension 3-brane... |
0710.3913 | Mark Israelit | Mark Israelit (University of Haifa - Oranim) | Charged fundamental particles in Wesson's IMT | 24 pages. Submitted to the Found. of Physics | null | null | null | gr-qc | null | In the framework of the Weyl-Dirac version of Wesson's Induced Matter Theory,
spherically symmetric entities filled with an electrically charged substance
are obtained in the empty 4D space-time, the brane. The substance,
characterized by mass and charge density as well by pressure, is induced by the
5D bulk. The ent... | [
{
"created": "Sun, 21 Oct 2007 09:07:43 GMT",
"version": "v1"
}
] | 2007-10-23 | [
[
"Israelit",
"Mark",
"",
"University of Haifa - Oranim"
]
] | In the framework of the Weyl-Dirac version of Wesson's Induced Matter Theory, spherically symmetric entities filled with an electrically charged substance are obtained in the empty 4D space-time, the brane. The substance, characterized by mass and charge density as well by pressure, is induced by the 5D bulk. The entit... |
2303.15661 | Baocheng Zhang | Ling Chen, Hongbin Zhang and Baocheng Zhang | An optical analogue for rotating BTZ black holes | null | Commun. Theor. Phys. 75, 035302 (2023) | 10.1088/1572-9494/acb6ed | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate an optical realization for the rotating BTZ black hole using
the recent popular photon fluid model in an optical vortex but with a new
proposed expression for the optical phase. We also give the numerical
realization for the optical vortex to ensure that it can be generated
experimentally. Different fr... | [
{
"created": "Tue, 28 Mar 2023 01:03:11 GMT",
"version": "v1"
}
] | 2023-03-29 | [
[
"Chen",
"Ling",
""
],
[
"Zhang",
"Hongbin",
""
],
[
"Zhang",
"Baocheng",
""
]
] | We demonstrate an optical realization for the rotating BTZ black hole using the recent popular photon fluid model in an optical vortex but with a new proposed expression for the optical phase. We also give the numerical realization for the optical vortex to ensure that it can be generated experimentally. Different from... |
gr-qc/0401075 | Muhammad Sharif | M. Sharif | Matter Collineations of Some Static Spherically Symmetric Spacetimes | null | Astrophys.Space Sci. 278 (2001) 447-455 | null | null | gr-qc | null | We derive matter collineations for some static spherically symmetric
spacetimes and compare the results with Killing, Ricci and Curvature
symmetries. We conclude that matter and Ricci collineations are not, in
general, the same.
| [
{
"created": "Fri, 16 Jan 2004 12:57:58 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sharif",
"M.",
""
]
] | We derive matter collineations for some static spherically symmetric spacetimes and compare the results with Killing, Ricci and Curvature symmetries. We conclude that matter and Ricci collineations are not, in general, the same. |
1607.03299 | Daniela Doneva | Daniela D. Doneva, Stoytcho S. Yazadjiev | Rapidly rotating neutron stars with a massive scalar field - structure
and universal relations | 10 pages, 2 figures | null | 10.1088/1475-7516/2016/11/019 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct rapidly rotating neutron star models in scalar-tensor theories
with a massive scalar field. The fact that the scalar field has nonzero mass
leads to very interesting results since the allowed range of values of the
coupling parameters is significantly broadened. These deviations from pure
general relativ... | [
{
"created": "Tue, 12 Jul 2016 10:30:52 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Doneva",
"Daniela D.",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | We construct rapidly rotating neutron star models in scalar-tensor theories with a massive scalar field. The fact that the scalar field has nonzero mass leads to very interesting results since the allowed range of values of the coupling parameters is significantly broadened. These deviations from pure general relativit... |
gr-qc/0512097 | Robert Bartnik | Robert Bartnik and Paul Tod | A note on static metrics | latex, 4 pages, no figures | Class.Quant.Grav. 23 (2006) 569-572 | 10.1088/0264-9381/23/2/N01 | NI05080 | gr-qc | null | Conditions are given which, subject to a genericity condition on the Ricci
tensor, are both necessary and sufficient for a 3-metric to arise from a static
spacetime metric.
| [
{
"created": "Fri, 16 Dec 2005 09:58:28 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Bartnik",
"Robert",
""
],
[
"Tod",
"Paul",
""
]
] | Conditions are given which, subject to a genericity condition on the Ricci tensor, are both necessary and sufficient for a 3-metric to arise from a static spacetime metric. |
2306.11166 | Aaron Zimmerman | Aaron Zimmerman, Richard N. George, Yanbei Chen | Rogue echoes from exotic compact objects | 5+6 pages, 5 figures | null | null | UTWI-22-2023 | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Binary systems containing exotic compact objects may emit repeated bursts of
gravitational waves (GWs) following coalescence. Such GW echoes would provide a
clear signature of new physics, but searches for them have not yielded a
convincing detection. Here we argue that the typical time delay between a GW
event and i... | [
{
"created": "Mon, 19 Jun 2023 21:13:11 GMT",
"version": "v1"
}
] | 2023-06-21 | [
[
"Zimmerman",
"Aaron",
""
],
[
"George",
"Richard N.",
""
],
[
"Chen",
"Yanbei",
""
]
] | Binary systems containing exotic compact objects may emit repeated bursts of gravitational waves (GWs) following coalescence. Such GW echoes would provide a clear signature of new physics, but searches for them have not yielded a convincing detection. Here we argue that the typical time delay between a GW event and its... |
2201.06461 | Tim Whittaker | Tim Whittaker, William E. East, Stephen R. Green, Luis Lehner, Huan
Yang | Using machine learning to parametrize postmerger signals from binary
neutron stars | null | Phys. Rev. D 105, 124021 (2022) | 10.1103/PhysRevD.105.124021 | null | gr-qc astro-ph.HE cs.LG stat.ML | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is growing interest in the detection and characterization of
gravitational waves from postmerger oscillations of binary neutron stars. These
signals contain information about the nature of the remnant and the
high-density and out-of-equilibrium physics of the postmerger processes, which
would complement any ele... | [
{
"created": "Mon, 17 Jan 2022 15:14:35 GMT",
"version": "v1"
}
] | 2022-07-20 | [
[
"Whittaker",
"Tim",
""
],
[
"East",
"William E.",
""
],
[
"Green",
"Stephen R.",
""
],
[
"Lehner",
"Luis",
""
],
[
"Yang",
"Huan",
""
]
] | There is growing interest in the detection and characterization of gravitational waves from postmerger oscillations of binary neutron stars. These signals contain information about the nature of the remnant and the high-density and out-of-equilibrium physics of the postmerger processes, which would complement any elect... |
2005.02228 | Yun-Cherng Lin | Yun-Cherng Lin, Michael P. Hobson, Anthony N. Lasenby | Ghost and tachyon free Weyl gauge theories: a systematic approach | 19 pages, 2 figures, accepted for publication in Physical Review D | Phys. Rev. D 104, 024034 (2021) | 10.1103/PhysRevD.104.024034 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the particle content of parity-preserving Weyl gauge theories
of gravity (WGT$^+$) about a Minkowski background. Within a subset of the full
theory, we use a systematic method previously presented in [arXiv:1812.02675]
to determine 862 critical cases for which the parameter values in the action
lead to... | [
{
"created": "Tue, 5 May 2020 14:29:41 GMT",
"version": "v1"
},
{
"created": "Tue, 25 May 2021 13:54:45 GMT",
"version": "v2"
}
] | 2021-07-21 | [
[
"Lin",
"Yun-Cherng",
""
],
[
"Hobson",
"Michael P.",
""
],
[
"Lasenby",
"Anthony N.",
""
]
] | We investigate the particle content of parity-preserving Weyl gauge theories of gravity (WGT$^+$) about a Minkowski background. Within a subset of the full theory, we use a systematic method previously presented in [arXiv:1812.02675] to determine 862 critical cases for which the parameter values in the action lead to a... |
gr-qc/0506024 | Gaurav Khanna | Daniel Cartin, Gaurav Khanna | Separable sequences in Bianchi I loop quantum cosmology | 5 pages, 3 figures, published version | Phys.Rev. D72 (2005) 084008 | 10.1103/PhysRevD.72.084008 | null | gr-qc hep-th | null | In this paper, we discuss the properties of one-parameter sequences that
arise when solving the Hamiltonian constraint in Bianchi I loop quantum
cosmology using a separation of variables method. In particular, we focus on
finding an expression for the sequence for all real values of the parameter,
and discuss the pre... | [
{
"created": "Sun, 5 Jun 2005 11:33:21 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Oct 2005 16:10:09 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Cartin",
"Daniel",
""
],
[
"Khanna",
"Gaurav",
""
]
] | In this paper, we discuss the properties of one-parameter sequences that arise when solving the Hamiltonian constraint in Bianchi I loop quantum cosmology using a separation of variables method. In particular, we focus on finding an expression for the sequence for all real values of the parameter, and discuss the pre-c... |
1605.00231 | Christian Duval | C. Duval (CPT), G.W. Gibbons (DAMTP/CMS), P.A. Horv\'athy (LMPT) | Conformal and projective symmetries in Newtonian cosmology | LaTeX, 26 pages. Published version | null | 10.1016/j.geomphys.2016.11.012 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Definitions of non-relativistic conformal transformations are considered both
in the Newton-Cartan and in the Kaluza-Klein-type Eisenhart/Bargmann
geometrical frameworks. The symmetry groups that come into play are exemplified
by the cosmological, and also the Newton-Hooke solutions of Newton's
gravitational field eq... | [
{
"created": "Sun, 1 May 2016 10:18:22 GMT",
"version": "v1"
},
{
"created": "Mon, 9 May 2016 10:49:27 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Jan 2017 14:10:56 GMT",
"version": "v3"
}
] | 2017-01-06 | [
[
"Duval",
"C.",
"",
"CPT"
],
[
"Gibbons",
"G. W.",
"",
"DAMTP/CMS"
],
[
"Horváthy",
"P. A.",
"",
"LMPT"
]
] | Definitions of non-relativistic conformal transformations are considered both in the Newton-Cartan and in the Kaluza-Klein-type Eisenhart/Bargmann geometrical frameworks. The symmetry groups that come into play are exemplified by the cosmological, and also the Newton-Hooke solutions of Newton's gravitational field equa... |
gr-qc/9907022 | Jerry B. Griffiths | J. Podolsky and J. B. Griffiths | Expanding impulsive gravitational waves | 11 pages, LaTeX, To appear in Class. Quantum Grav | Class.Quant.Grav. 16 (1999) 2937-2946 | 10.1088/0264-9381/16/9/311 | null | gr-qc | null | We explicitly demonstrate that the known solutions for expanding impulsive
spherical gravitational waves that have been obtained by a "cut and paste"
method may be considered to be impulsive limits of the Robinson-Trautman vacuum
type N solutions. We extend these results to all the generically distinct
subclasses of ... | [
{
"created": "Tue, 6 Jul 1999 12:49:08 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Podolsky",
"J.",
""
],
[
"Griffiths",
"J. B.",
""
]
] | We explicitly demonstrate that the known solutions for expanding impulsive spherical gravitational waves that have been obtained by a "cut and paste" method may be considered to be impulsive limits of the Robinson-Trautman vacuum type N solutions. We extend these results to all the generically distinct subclasses of th... |
gr-qc/0108016 | Maurizio Gasperini | M. Gasperini, F. Piazza and G. Veneziano | Quintessence as a run-away dilaton | 31 pages, latex, 5 figures included using epsfig. New references
added and misprints corrected. To appear in Phys. Rev. D | Phys.Rev. D65 (2002) 023508 | 10.1103/PhysRevD.65.023508 | BA-TH/01-419 | gr-qc astro-ph hep-th | null | We consider a late-time cosmological model based on a recent proposal that
the infinite-bare-coupling limit of superstring/M-theory exists and has good
phenomenological properties, including a vanishing cosmological constant, and a
massless, decoupled dilaton. As it runs away to $+ \infty$, the dilaton can
play the r... | [
{
"created": "Sat, 4 Aug 2001 16:45:30 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Oct 2001 10:46:37 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Gasperini",
"M.",
""
],
[
"Piazza",
"F.",
""
],
[
"Veneziano",
"G.",
""
]
] | We consider a late-time cosmological model based on a recent proposal that the infinite-bare-coupling limit of superstring/M-theory exists and has good phenomenological properties, including a vanishing cosmological constant, and a massless, decoupled dilaton. As it runs away to $+ \infty$, the dilaton can play the rol... |
1312.3548 | Jos\'e Tom\'as G\'alvez Ghersi | Jose Tomas Galvez Ghersi | Bimetric Models of Gravity and Cosmology in the Early Universe | 46 pages, 5 figures, Submitted as an MSc. thesis at Imperial College
London | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this dissertation, we explore models based on the idea that there are two
metrics in spacetime: One describes the standard gravity, and the other
provides a geometry in which matter fields propagate. In order to do that, we
provide the essentials of Finsler geometry and the rules to induce a metric for
the propaga... | [
{
"created": "Thu, 12 Dec 2013 17:13:52 GMT",
"version": "v1"
}
] | 2013-12-13 | [
[
"Ghersi",
"Jose Tomas Galvez",
""
]
] | In this dissertation, we explore models based on the idea that there are two metrics in spacetime: One describes the standard gravity, and the other provides a geometry in which matter fields propagate. In order to do that, we provide the essentials of Finsler geometry and the rules to induce a metric for the propagati... |
gr-qc/9803022 | Victor Berezin | Victor Berezin | Quantum black holes:unexpected results | LaTex file. 11 pages. Talk given at the Birthday Conference dedicated
to A.Arvilski, 17th of February, 1998 | null | null | null | gr-qc | null | The quantum black hole model with a self-gravitating spherically symmetric
thin dust shell as a source is considered. The shell Hamiltonian constraint is
written and the corresponding Schroedinger equation is obtained. This equation
appeared to be a finite differences equation. Its solutions are required to be
analyt... | [
{
"created": "Thu, 5 Mar 1998 13:23:35 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Berezin",
"Victor",
""
]
] | The quantum black hole model with a self-gravitating spherically symmetric thin dust shell as a source is considered. The shell Hamiltonian constraint is written and the corresponding Schroedinger equation is obtained. This equation appeared to be a finite differences equation. Its solutions are required to be analytic... |
2009.05514 | Shasvath Kapadia | Shasvath J. Kapadia, Kanhaiya Lal Pandey, Teruaki Suyama, Shivaraj
Kandhasamy, Parameswaran Ajith | Search for the stochastic gravitational-wave background induced by
primordial curvature perturbations in LIGO's second observing run | 5 pages, 3 figures | ApJL 910 L4 (2021) | 10.3847/2041-8213/abe86e | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Primordial density perturbations in the radiation-dominated era of the early
Universe are expected to generate stochastic gravitational waves (GWs) due to
nonlinear mode coupling. In this \emph{Letter}, we report on a search for such
a stochastic GW background in the data of the two LIGO detectors during their
second... | [
{
"created": "Fri, 11 Sep 2020 16:32:37 GMT",
"version": "v1"
},
{
"created": "Sat, 27 Mar 2021 16:58:50 GMT",
"version": "v2"
}
] | 2021-03-30 | [
[
"Kapadia",
"Shasvath J.",
""
],
[
"Pandey",
"Kanhaiya Lal",
""
],
[
"Suyama",
"Teruaki",
""
],
[
"Kandhasamy",
"Shivaraj",
""
],
[
"Ajith",
"Parameswaran",
""
]
] | Primordial density perturbations in the radiation-dominated era of the early Universe are expected to generate stochastic gravitational waves (GWs) due to nonlinear mode coupling. In this \emph{Letter}, we report on a search for such a stochastic GW background in the data of the two LIGO detectors during their second o... |
gr-qc/9804064 | Kirill A. Bronnikov | K.A. Bronnikov (VNIIMS, Moscow, Russia), G. Clement (Universite Pierre
et Marie Curie, Paris, France), C.P. Constantinidis and J.C. Fabris (UFES,
Vitoria, ES, Brazil) | Cold Scalar-Tensor Black Holes: Causal Structure, Geodesics, Stability | LaTeX, 11 pages, 4 figures, uses bezier.sty; to appear in Grav. and
Cosmol | Grav.Cosmol. 4 (1998) 128-138 | null | null | gr-qc | null | We study the structure and stability of spherically symmetric Brans-Dicke
black-hole type solutions with an infinite horizon area and zero Hawking
temperature, existing for negative values of the coupling constant $\omega$.
These solutions split into two classes, depending on finite (B1) or infinite
(B2) proper time ... | [
{
"created": "Fri, 24 Apr 1998 11:27:11 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bronnikov",
"K. A.",
"",
"VNIIMS, Moscow, Russia"
],
[
"Clement",
"G.",
"",
"Universite Pierre\n et Marie Curie, Paris, France"
],
[
"Constantinidis",
"C. P.",
"",
"UFES,\n Vitoria, ES, Brazil"
],
[
"Fabris",
"J. C.",
"",
"UFES,\n Vit... | We study the structure and stability of spherically symmetric Brans-Dicke black-hole type solutions with an infinite horizon area and zero Hawking temperature, existing for negative values of the coupling constant $\omega$. These solutions split into two classes, depending on finite (B1) or infinite (B2) proper time ne... |
2304.06494 | Hooman Moradpour | H. Moradpour, S. Jalalzadeh, Umesh Kumar Sharma | On the thermodynamics of reconciling quantum and gravity | null | Eur. Phys. J. Plus (2024) 139:170 | 10.1140/epjp/s13360-024-04943-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Is thermodynamics consistent with the quantum gravity reconciliation
hypothesis [A. G. Cohen et al. Phys. Rev. Lett. 82, 4971 (1999)], which
establishes holographic dark energy models? Here, we have attempted to address
this issue in the affirmative by concentrating on the first law of
thermodynamics.
| [
{
"created": "Tue, 11 Apr 2023 08:49:29 GMT",
"version": "v1"
}
] | 2024-02-20 | [
[
"Moradpour",
"H.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Sharma",
"Umesh Kumar",
""
]
] | Is thermodynamics consistent with the quantum gravity reconciliation hypothesis [A. G. Cohen et al. Phys. Rev. Lett. 82, 4971 (1999)], which establishes holographic dark energy models? Here, we have attempted to address this issue in the affirmative by concentrating on the first law of thermodynamics. |
1801.07489 | Alexander Kamenshchik | R. Casadio, A.Yu. Kamenshchik and O.V. Teryaev | Hawking radiation and the Bloom-Gilman duality | 7 pages, 3 figures | Classical and Quantum Gravity 35, 155001 (2018) | 10.1088/1361-6382/aacc55 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The decay widths of the quantum black hole precursors, determined from the
poles of the resummed graviton propagator, are matched to the expected lifetime
given by the Hawking decay. In this way, we impose a sort of duality between a
perturbative description and an essentially non-perturbative description,
bearing so... | [
{
"created": "Tue, 23 Jan 2018 11:36:09 GMT",
"version": "v1"
}
] | 2018-07-02 | [
[
"Casadio",
"R.",
""
],
[
"Kamenshchik",
"A. Yu.",
""
],
[
"Teryaev",
"O. V.",
""
]
] | The decay widths of the quantum black hole precursors, determined from the poles of the resummed graviton propagator, are matched to the expected lifetime given by the Hawking decay. In this way, we impose a sort of duality between a perturbative description and an essentially non-perturbative description, bearing some... |
gr-qc/0305070 | Gennady L. Krasnikov | S. Krasnikov | Time machine (1988--2001) | Talk given at 11th UK Conference on the Philosophy of Physics (Oxford
2002) | null | null | null | gr-qc | null | A very brief and popular account of the time machine problem.
| [
{
"created": "Mon, 19 May 2003 14:40:16 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Krasnikov",
"S.",
""
]
] | A very brief and popular account of the time machine problem. |
2005.05988 | Olivier Sarbach | Paola Rioseco and Olivier Sarbach | Phase space mixing in an external gravitational central potential | 33 pages, 9 figures. Additional references, conclusions expanded, and
typos corrected. To appear in Classical and Quantum Gravity | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article is devoted to the study of the dynamical behavior of a
collisionless kinetic gas in d=1,2,3 space dimensions which is trapped in a
rotationally symmetric potential well. Although at the microscopic level the
trajectories of individual gas particles are quasi-periodic and characterized
by their d fundamen... | [
{
"created": "Tue, 12 May 2020 18:00:12 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Aug 2020 23:39:58 GMT",
"version": "v2"
}
] | 2020-08-19 | [
[
"Rioseco",
"Paola",
""
],
[
"Sarbach",
"Olivier",
""
]
] | This article is devoted to the study of the dynamical behavior of a collisionless kinetic gas in d=1,2,3 space dimensions which is trapped in a rotationally symmetric potential well. Although at the microscopic level the trajectories of individual gas particles are quasi-periodic and characterized by their d fundamenta... |
gr-qc/0507070 | Grigori Kirilin | G. G. Kirilin | Quantum corrections to spin effects in general relativity | 14 pages, 6 figures | Nucl.Phys.B728:179-191,2005 | 10.1016/j.nuclphysb.2005.08.043 | null | gr-qc | null | Quantum power corrections to the gravitational spin-orbit and spin-spin
interactions, as well as to the Lense-Thirring effect, were found for particles
of spin 1/2. These corrections arise from diagrams of second order in Newton
gravitational constant G with two massless particles in the unitary cut in the
t-channel.... | [
{
"created": "Sat, 16 Jul 2005 04:57:22 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Kirilin",
"G. G.",
""
]
] | Quantum power corrections to the gravitational spin-orbit and spin-spin interactions, as well as to the Lense-Thirring effect, were found for particles of spin 1/2. These corrections arise from diagrams of second order in Newton gravitational constant G with two massless particles in the unitary cut in the t-channel. T... |
gr-qc/9608057 | Doctorandos Relatividad | Esteban A. Calzetta and Sonia Gonorazky | Primordial fluctuations from nonlinear couplings | 12 pages, Revtex, we added an appendix clarifying our assumptions
about the initial conditions at the beggining of inflation | Phys.Rev.D55:1812-1821,1997 | 10.1103/PhysRevD.55.1812 | null | gr-qc | null | We study the spectrum of primordial fluctuations in theories where the
inflaton field is coupled to massless fields and/or to itself. Conformally
invariant theories generically predict a scale invariant spectrum. Scales
entering the theory through infrared divergences cause logarithmic corrections
to the spectrum, ti... | [
{
"created": "Fri, 23 Aug 1996 18:29:00 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Nov 1996 15:15:14 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Calzetta",
"Esteban A.",
""
],
[
"Gonorazky",
"Sonia",
""
]
] | We study the spectrum of primordial fluctuations in theories where the inflaton field is coupled to massless fields and/or to itself. Conformally invariant theories generically predict a scale invariant spectrum. Scales entering the theory through infrared divergences cause logarithmic corrections to the spectrum, tilt... |
0806.4574 | Maria Principe | Maria Principe and Innocenzo M Pinto | Modeling the Impulsive Noise Component and its Effect on the Operation
of a Simple Coherent Network Algorithm for Unmodeled Gravitational Wave
Bursts Detection | 15 pages, 8 figures | Class.Quant.Grav.25:075013,2008 | 10.1088/0264-9381/25/7/075013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An analytic model a la Middleton of the impulsive noise component in the data
of interferometric gravitational wave detectors is proposed, based on an atomic
representation of glitches. A fully analytic characterization of the coherent
network data analysis algorithm proposed by Rakhmanov and Klimenko is obtained,
fo... | [
{
"created": "Fri, 27 Jun 2008 17:16:32 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Principe",
"Maria",
""
],
[
"Pinto",
"Innocenzo M",
""
]
] | An analytic model a la Middleton of the impulsive noise component in the data of interferometric gravitational wave detectors is proposed, based on an atomic representation of glitches. A fully analytic characterization of the coherent network data analysis algorithm proposed by Rakhmanov and Klimenko is obtained, for ... |
gr-qc/9901054 | T. P. Singh | Sukratu Barve, T. P. Singh, Cenalo Vaz and Louis Witten | A simple derivation of the naked singularity in spherical dust collapse | Latex, 9 pages | Class.Quant.Grav. 16 (1999) 1727-1732 | 10.1088/0264-9381/16/6/306 | null | gr-qc | null | We describe a simple method of determining whether the singularity that forms
in the spherically symmetric collapse of inhomogeneous dust is naked or
covered. This derivation considerably simplifies the analysis given in the
earlier literature, while giving the same results as have been obtained before.
| [
{
"created": "Wed, 20 Jan 1999 10:32:40 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Barve",
"Sukratu",
""
],
[
"Singh",
"T. P.",
""
],
[
"Vaz",
"Cenalo",
""
],
[
"Witten",
"Louis",
""
]
] | We describe a simple method of determining whether the singularity that forms in the spherically symmetric collapse of inhomogeneous dust is naked or covered. This derivation considerably simplifies the analysis given in the earlier literature, while giving the same results as have been obtained before. |
1603.08665 | Qing-Yu Cai | Zhiqiang Huang, Dongfeng Gao and Qing-yu Cai | Scalar and tensor perturbation in vacuum inflation | null | Class. Quantum Grav. 34 105013 (2017) | 10.1088/1361-6382/aa6b9c | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, it was proposed that a small true vacuum universe can inflate
spontaneously, in principle. Furthermore, there should be matter creation in
vacuum inflation due to quantum fluctuations, and the matter created will
influence the inflation simultaneously. In this paper, scalar and tensor
perturbations in this ... | [
{
"created": "Tue, 29 Mar 2016 07:35:11 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Mar 2016 03:04:07 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Apr 2017 13:31:38 GMT",
"version": "v3"
}
] | 2017-05-01 | [
[
"Huang",
"Zhiqiang",
""
],
[
"Gao",
"Dongfeng",
""
],
[
"Cai",
"Qing-yu",
""
]
] | Recently, it was proposed that a small true vacuum universe can inflate spontaneously, in principle. Furthermore, there should be matter creation in vacuum inflation due to quantum fluctuations, and the matter created will influence the inflation simultaneously. In this paper, scalar and tensor perturbations in this mo... |
1001.2226 | Marek Nowakowski | I. Arraut, D. Batic, M. Nowakowski | Maximal extension of the Schwarzschild spacetime inspired by
noncommutative geometry | 17 pages LaTex, 2 figures | null | 10.1063/1.3317913 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a transformation of the noncommutative geometry inspired
Schwarzschild solution into new coordinates such that the apparent unphysical
singularities of the metric are removed. Moreover, we give the maximal
singularity-free atlas for the manifold with the metric under consideration.
This atlas reveals many n... | [
{
"created": "Wed, 13 Jan 2010 16:37:13 GMT",
"version": "v1"
}
] | 2015-05-18 | [
[
"Arraut",
"I.",
""
],
[
"Batic",
"D.",
""
],
[
"Nowakowski",
"M.",
""
]
] | We derive a transformation of the noncommutative geometry inspired Schwarzschild solution into new coordinates such that the apparent unphysical singularities of the metric are removed. Moreover, we give the maximal singularity-free atlas for the manifold with the metric under consideration. This atlas reveals many new... |
1810.06783 | Tadashi Sasaki | Tadashi Sasaki and Hisao Suzuki | Tracking Pre-inflation Era from density perturbation spectra | 9 pages, 2 figures | Phys. Rev. D 99, 063502 (2019) | 10.1103/PhysRevD.99.063502 | EPHOU-18-012 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the great triumphs of the inflationary model is the prediction of the
flat power spectrum of the CMB fluctuation. The prediction is based on the
assumption of the de-Sitter vacuum in the past infinity. However, the true past
infinity of the inflation is expected to be dominated by radiation and
curvature of th... | [
{
"created": "Tue, 16 Oct 2018 01:40:17 GMT",
"version": "v1"
}
] | 2019-03-27 | [
[
"Sasaki",
"Tadashi",
""
],
[
"Suzuki",
"Hisao",
""
]
] | One of the great triumphs of the inflationary model is the prediction of the flat power spectrum of the CMB fluctuation. The prediction is based on the assumption of the de-Sitter vacuum in the past infinity. However, the true past infinity of the inflation is expected to be dominated by radiation and curvature of the ... |
2203.08099 | Anisur Rahaman | Sohan Kumar Jha and Anisur Rahaman | Kerr-Sen-like Lorentz violating black holes and Superradiance phenomena | 22 pages latex with figures. arXiv admin note: substantial text
overlap with arXiv:2111.02817 | null | 10.1140/epjc/s10052-022-10307-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Kerr-Sen-like black hole solution results from Einstein-bumblebee gravity.
It contains a Lorentz violating (LV) parameter that enters when the bumblebee
field receives vacuum expectation value through a spontaneously breaking of the
symmetry of the classical action. The geometrical structure concerning the
singular... | [
{
"created": "Tue, 15 Mar 2022 17:26:22 GMT",
"version": "v1"
}
] | 2022-05-25 | [
[
"Jha",
"Sohan Kumar",
""
],
[
"Rahaman",
"Anisur",
""
]
] | A Kerr-Sen-like black hole solution results from Einstein-bumblebee gravity. It contains a Lorentz violating (LV) parameter that enters when the bumblebee field receives vacuum expectation value through a spontaneously breaking of the symmetry of the classical action. The geometrical structure concerning the singularit... |
gr-qc/0401013 | Vojt\v{e}ch Pravda | V. Pravda, A. Pravdova, A. Coley, R. Milson | Bianchi identities in higher dimensions | 25 pages, v3: Corrections to Appendix B as given in
Erratum-ibid.24:1691,2007 are now incorporated (A factor of 2 was missing in
certain Bianchi equations.) | Class.Quant.Grav.21:2873-2898,2004; Erratum-ibid.24:1691,2007 | 10.1088/0264-9381/21/12/007 10.1088/0264-9381/24/6/C01 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A higher dimensional frame formalism is developed in order to study
implications of the Bianchi identities for the Weyl tensor in vacuum spacetimes
of the algebraic types III and N in arbitrary dimension $n$. It follows that
the principal null congruence is geodesic and expands isotropically in two
dimensions and doe... | [
{
"created": "Sun, 4 Jan 2004 14:19:47 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Apr 2004 21:15:42 GMT",
"version": "v2"
},
{
"created": "Sat, 29 Aug 2009 08:14:51 GMT",
"version": "v3"
}
] | 2009-08-29 | [
[
"Pravda",
"V.",
""
],
[
"Pravdova",
"A.",
""
],
[
"Coley",
"A.",
""
],
[
"Milson",
"R.",
""
]
] | A higher dimensional frame formalism is developed in order to study implications of the Bianchi identities for the Weyl tensor in vacuum spacetimes of the algebraic types III and N in arbitrary dimension $n$. It follows that the principal null congruence is geodesic and expands isotropically in two dimensions and does ... |
2105.08521 | Guo-Ping Li | Guo-Ping Li and Ke-Jian He | Shadows and rings of the Kehagias-Sfetsos black hole surrounded by thin
disk accretion | 17 pages, 28 figures, minor revisions, references added | null | 10.1088/1475-7516/2021/06/037 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, under the illumination of thin disk accretion, we have
employed the ray-tracing method to carefully investigate shadows and rings of
the Kehagias-Sfetsos(KS) black hole in deformed Ho\v{r}ava-Lifshitz(HL)
gravity. The results show that the event horizon $r_+$, the radius $r_p$ and
impact parameter $b_{... | [
{
"created": "Mon, 17 May 2021 08:49:16 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Jun 2021 14:11:15 GMT",
"version": "v2"
}
] | 2021-06-30 | [
[
"Li",
"Guo-Ping",
""
],
[
"He",
"Ke-Jian",
""
]
] | In this paper, under the illumination of thin disk accretion, we have employed the ray-tracing method to carefully investigate shadows and rings of the Kehagias-Sfetsos(KS) black hole in deformed Ho\v{r}ava-Lifshitz(HL) gravity. The results show that the event horizon $r_+$, the radius $r_p$ and impact parameter $b_{p}... |
1502.00278 | Francesca Vidotto | Carlo Rovelli and Francesca Vidotto | Compact phase space, cosmological constant, discrete time | 6 pages | Phys. Rev. D 91, 084037 (2015) | 10.1103/PhysRevD.91.084037 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the quantization of geometry in the presence of a cosmological
constant, using a discretiza- tion with constant-curvature simplices. Phase
space turns out to be compact and the Hilbert space finite dimensional for each
link. Not only the intrinsic, but also the extrinsic geometry turns out to be
discrete, po... | [
{
"created": "Sun, 1 Feb 2015 16:16:40 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Feb 2015 10:51:37 GMT",
"version": "v2"
}
] | 2015-04-22 | [
[
"Rovelli",
"Carlo",
""
],
[
"Vidotto",
"Francesca",
""
]
] | We study the quantization of geometry in the presence of a cosmological constant, using a discretiza- tion with constant-curvature simplices. Phase space turns out to be compact and the Hilbert space finite dimensional for each link. Not only the intrinsic, but also the extrinsic geometry turns out to be discrete, poin... |
1503.07920 | Freddy Cueva Solano | Freddy Cueva Solano | Exploring the effects of a double reconstruction on the geometrical
parameters of coupled models, using observational data | 14 pages, 7 figures, 8 Tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study the effects of the non-gravitational exchange energy
(Q) between dark matter (DM) fluid and dark energy (DE) fluid on the background
evolution of the cosmological parameters. A varying equation of state (EOS)
parameter, {\omega}, for DE is proposed. Considering an universe spatially
flat, two di... | [
{
"created": "Thu, 26 Mar 2015 22:20:19 GMT",
"version": "v1"
},
{
"created": "Sun, 19 Apr 2015 22:50:33 GMT",
"version": "v2"
}
] | 2015-04-21 | [
[
"Solano",
"Freddy Cueva",
""
]
] | In this work we study the effects of the non-gravitational exchange energy (Q) between dark matter (DM) fluid and dark energy (DE) fluid on the background evolution of the cosmological parameters. A varying equation of state (EOS) parameter, {\omega}, for DE is proposed. Considering an universe spatially flat, two dist... |
gr-qc/0306027 | Leonardo Gualtieri | Carlos F. Sopuerta, Marco Bruni, Leonardo Gualtieri | Non-Linear N-Parameter Spacetime Perturbations: Gauge Transformations | 7 pages, no figures, RevTeX 4.0. Revised version to match version
published in PRD | Phys.Rev. D70 (2004) 064002 | 10.1103/PhysRevD.70.064002 | null | gr-qc astro-ph hep-th | null | We introduce N-parameter perturbation theory as a new tool for the study of
non-linear relativistic phenomena. The main ingredient in this formulation is
the use of the Baker-Campbell-Hausdorff formula. The associated machinery
allows us to prove the main results concerning the consistency of the scheme to
any pertur... | [
{
"created": "Fri, 6 Jun 2003 18:26:34 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Oct 2003 21:07:13 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Sep 2004 21:20:11 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Sopuerta",
"Carlos F.",
""
],
[
"Bruni",
"Marco",
""
],
[
"Gualtieri",
"Leonardo",
""
]
] | We introduce N-parameter perturbation theory as a new tool for the study of non-linear relativistic phenomena. The main ingredient in this formulation is the use of the Baker-Campbell-Hausdorff formula. The associated machinery allows us to prove the main results concerning the consistency of the scheme to any perturba... |
1603.06377 | Eugen Radu | Eugen Radu, D. H. Tchrakian and Yisong Yang | Non-Abelian clouds around Reissner-Nordstr\"om black holes: the
existence line | 19 pages, 5 figures | Phys. Rev. D 93, 124069 (2016) | 10.1103/PhysRevD.93.124069 | DIAS-STP-16-01 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A known feature of electrically charged Reissner-Nordstr\"om-anti-de Sitter
planar black holes is that they can become unstable when considered as
solutions of Einstein--Yang-Mills theory. The mechanism for this is that the
linearized Yang-Mills equations in the background of the Reissner-Nordstr\"om
(RN) black holes... | [
{
"created": "Mon, 21 Mar 2016 10:30:38 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Apr 2016 08:34:21 GMT",
"version": "v2"
}
] | 2016-07-06 | [
[
"Radu",
"Eugen",
""
],
[
"Tchrakian",
"D. H.",
""
],
[
"Yang",
"Yisong",
""
]
] | A known feature of electrically charged Reissner-Nordstr\"om-anti-de Sitter planar black holes is that they can become unstable when considered as solutions of Einstein--Yang-Mills theory. The mechanism for this is that the linearized Yang-Mills equations in the background of the Reissner-Nordstr\"om (RN) black holes p... |
2005.13809 | Ryotaro Kase | Ryotaro Kase and Shinji Tsujikawa | General formulation of cosmological perturbations in scalar-tensor dark
energy coupled to dark matter | 26 pages, 1 figure, published version | JCAP11(2020)032 | 10.1088/1475-7516/2020/11/032 | WUCG-20-03 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For a scalar field $\phi$ coupled to cold dark matter (CDM), we provide a
general framework for studying the background and perturbation dynamics on the
isotropic cosmological background. The dark energy sector is described by a
Horndeski Lagrangian with the speed of gravitational waves equivalent to that
of light, w... | [
{
"created": "Thu, 28 May 2020 07:07:13 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Nov 2020 02:52:34 GMT",
"version": "v2"
}
] | 2020-11-18 | [
[
"Kase",
"Ryotaro",
""
],
[
"Tsujikawa",
"Shinji",
""
]
] | For a scalar field $\phi$ coupled to cold dark matter (CDM), we provide a general framework for studying the background and perturbation dynamics on the isotropic cosmological background. The dark energy sector is described by a Horndeski Lagrangian with the speed of gravitational waves equivalent to that of light, whe... |
2306.13687 | Gabriel Herczeg | Damien A. Easson, Gabriel Herczeg, Tucker Manton, and Max Pezzelle | Isometries and the double copy | Typographical errors corrected, results unchanged | J. High Energ. Phys. 2023, 162 (2023) | 10.1007/JHEP09(2023)162 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In the standard derivation of the Kerr-Schild double copy, the geodicity of
the Kerr-Schild vector and the stationarity of the spacetime are presented as
assumptions that are necessary for the single copy to satisfy Maxwell's
equations. However, it is well known that the vacuum Einstein equations imply
that the Kerr-... | [
{
"created": "Thu, 22 Jun 2023 18:49:07 GMT",
"version": "v1"
},
{
"created": "Sat, 9 Sep 2023 17:48:51 GMT",
"version": "v2"
},
{
"created": "Mon, 22 Apr 2024 16:19:30 GMT",
"version": "v3"
},
{
"created": "Tue, 28 May 2024 16:00:10 GMT",
"version": "v4"
}
] | 2024-05-29 | [
[
"Easson",
"Damien A.",
""
],
[
"Herczeg",
"Gabriel",
""
],
[
"Manton",
"Tucker",
""
],
[
"Pezzelle",
"Max",
""
]
] | In the standard derivation of the Kerr-Schild double copy, the geodicity of the Kerr-Schild vector and the stationarity of the spacetime are presented as assumptions that are necessary for the single copy to satisfy Maxwell's equations. However, it is well known that the vacuum Einstein equations imply that the Kerr-Sc... |
2208.14016 | Kirill Bronnikov | S.V. Bolokhov, K.A. Bronnikov, M.V. Skvortsova | Gravity assist as a test of relativistic gravity | 9 pages, 2 figures | Grav. Cosmol. 28 (4), 402-410 (2022) | 10.1134/S0202289322040053 | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the gravity assist maneuver, that is, a correction of spacecraft
motion at its passing near a planet, as a tool for evaluating the Eddington
post-Newtonian parameters $\beta$ and $\gamma$, characterizing vacuum
spherically symmetric gravitation fields in metric theories of gravity. We
estimate the effect ... | [
{
"created": "Tue, 30 Aug 2022 06:42:42 GMT",
"version": "v1"
}
] | 2023-11-14 | [
[
"Bolokhov",
"S. V.",
""
],
[
"Bronnikov",
"K. A.",
""
],
[
"Skvortsova",
"M. V.",
""
]
] | We consider the gravity assist maneuver, that is, a correction of spacecraft motion at its passing near a planet, as a tool for evaluating the Eddington post-Newtonian parameters $\beta$ and $\gamma$, characterizing vacuum spherically symmetric gravitation fields in metric theories of gravity. We estimate the effect of... |
2310.09067 | Tiberiu Harko | Rattanasak Hama, Tiberiu Harko, Sorin V. Sabau | Conformal gravitational theories in the Barthel-Kropina type Finslerian
geometry, and their cosmological implications | 19 pages, 6 figures, accepted for publication in EPJC | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider dark energy models obtained from the general conformal
transformation of the Kropina metric, representing an $(\alpha, \beta)$ type
Finslerian geometry, constructed as the ratio of the square of a Riemannian
metric $\alpha$, and of the one-form $\beta$. Conformal symmetries do appear in
many fields of phy... | [
{
"created": "Fri, 13 Oct 2023 12:41:58 GMT",
"version": "v1"
}
] | 2023-10-16 | [
[
"Hama",
"Rattanasak",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Sabau",
"Sorin V.",
""
]
] | We consider dark energy models obtained from the general conformal transformation of the Kropina metric, representing an $(\alpha, \beta)$ type Finslerian geometry, constructed as the ratio of the square of a Riemannian metric $\alpha$, and of the one-form $\beta$. Conformal symmetries do appear in many fields of physi... |
0812.4515 | Victor Berezin | Victor Berezin (Institute for Nuclear Research, Russian Academy of
Sciences) | Quantum Black Holes. Black Hole Temperature without a Black Hole | revtex4, 7 pages, Talk given at Workshop "Black Holes in General
Relativity and String Theory", August, 24-30, 2008, Veli Losinj, Croatia | PoS BHs,GRandStrings 2008:019,2008 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The model is constructed, some features of which comes from quantum thin dust
shells and is, in fact, an extension of the "no hair" property of classical
black hole on a quantum level. It appears that the proposed classical analog of
quantum black hole is heated, the temperature being exactly the Hawking's
temperatur... | [
{
"created": "Wed, 24 Dec 2008 10:18:27 GMT",
"version": "v1"
}
] | 2010-02-16 | [
[
"Berezin",
"Victor",
"",
"Institute for Nuclear Research, Russian Academy of\n Sciences"
]
] | The model is constructed, some features of which comes from quantum thin dust shells and is, in fact, an extension of the "no hair" property of classical black hole on a quantum level. It appears that the proposed classical analog of quantum black hole is heated, the temperature being exactly the Hawking's temperature. |
1801.05014 | Ghulam Abbas | S.M. Shah and G. Abbas | Dynamics of Charged Viscous Dissipative Cylindrical Collapse With Full
Causal Approach | 16 Pages, no figures, accepted for publication in EPJA | Eur. Phys. J. A (2017)53:228 | 10.1140/epja/i2017-12423-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of this paper is to investigate the dynamical aspects of charged
viscous cylindrical source by using Misner approach. To this end, we have
considered the more general charged dissipative fluid enclosed by the
cylindrical symmetric spacetime. The dissipative nature of the source is due to
the presence of dissi... | [
{
"created": "Thu, 11 Jan 2018 09:36:44 GMT",
"version": "v1"
}
] | 2018-01-24 | [
[
"Shah",
"S. M.",
""
],
[
"Abbas",
"G.",
""
]
] | The aim of this paper is to investigate the dynamical aspects of charged viscous cylindrical source by using Misner approach. To this end, we have considered the more general charged dissipative fluid enclosed by the cylindrical symmetric spacetime. The dissipative nature of the source is due to the presence of dissipa... |
gr-qc/9804040 | Gerhard Rein | Gerhard Rein, Alan D. Rendall, Jack Schaeffer | Critical collapse of collisionless matter - a numerical investigation | 22 pages, LaTeX, 7 figures (ps-files, automatically included using
psfig) | Phys. Rev. D 58, 044007 (1998) | 10.1103/PhysRevD.58.044007 | rrs98 | gr-qc | null | In recent years the threshold of black hole formation in spherically
symmetric gravitational collapse has been studied for a variety of matter
models. In this paper the corresponding issue is investigated for a matter
model significantly different from those considered so far in this context. We
study the transition ... | [
{
"created": "Fri, 17 Apr 1998 21:15:20 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Rein",
"Gerhard",
""
],
[
"Rendall",
"Alan D.",
""
],
[
"Schaeffer",
"Jack",
""
]
] | In recent years the threshold of black hole formation in spherically symmetric gravitational collapse has been studied for a variety of matter models. In this paper the corresponding issue is investigated for a matter model significantly different from those considered so far in this context. We study the transition fr... |
1903.10763 | Atsushi Naruko | Atsushi Naruko, Chul-Moon Yoo, Misao Sasaki | Possible resolution of a spacetime singularity with field
transformations | 5 pages, accepted version for publication in PTEP | null | null | TU1083,YITP-19-03 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is widely believed that classical gravity breaks down and quantum gravity
is needed to deal with a singularity. We show that there is a class of
spacetime curvature singularities which can be resolved with metric and matter
field transformations. As an example, we consider an anisotropic power-law
inflation model ... | [
{
"created": "Tue, 26 Mar 2019 09:55:44 GMT",
"version": "v1"
},
{
"created": "Tue, 25 May 2021 08:55:45 GMT",
"version": "v2"
}
] | 2021-05-26 | [
[
"Naruko",
"Atsushi",
""
],
[
"Yoo",
"Chul-Moon",
""
],
[
"Sasaki",
"Misao",
""
]
] | It is widely believed that classical gravity breaks down and quantum gravity is needed to deal with a singularity. We show that there is a class of spacetime curvature singularities which can be resolved with metric and matter field transformations. As an example, we consider an anisotropic power-law inflation model wi... |
0805.4309 | Mihalis Dafermos | Mihalis Dafermos and Igor Rodnianski | A proof of the uniform boundedness of solutions to the wave equation on
slowly rotating Kerr backgrounds | 71 pages, 3 figures | Invent. Math. 185 (2011), 467-559 | 10.1007/s00222-010-0309-0 | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider Kerr spacetimes with parameters a and M such that |a|<< M,
Kerr-Newman spacetimes with parameters |Q|<< M, |a|<< M, and more generally,
stationary axisymmetric black hole exterior spacetimes which are sufficiently
close to a Schwarzschild metric with parameter M>0, with appropriate geometric
assumptions o... | [
{
"created": "Wed, 28 May 2008 11:02:00 GMT",
"version": "v1"
}
] | 2015-05-13 | [
[
"Dafermos",
"Mihalis",
""
],
[
"Rodnianski",
"Igor",
""
]
] | We consider Kerr spacetimes with parameters a and M such that |a|<< M, Kerr-Newman spacetimes with parameters |Q|<< M, |a|<< M, and more generally, stationary axisymmetric black hole exterior spacetimes which are sufficiently close to a Schwarzschild metric with parameter M>0, with appropriate geometric assumptions on ... |
1012.0595 | Christian Reisswig | Christian Reisswig, Christian D. Ott, Ulrich Sperhake, Erik Schnetter | Gravitational Wave Extraction in Simulations of Rotating Stellar Core
Collapse | 26 pages, 10 figures, 5 tables, matches published version | Phys.Rev.D83:064008,2011 | 10.1103/PhysRevD.83.064008 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform simulations of general relativistic rotating stellar core collapse
and compute the gravitational waves (GWs) emitted in the core bounce phase of
three representative models via multiple techniques. The simplest technique,
the quadrupole formula (QF), estimates the GW content in the spacetime from the
mass ... | [
{
"created": "Thu, 2 Dec 2010 22:30:38 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Mar 2011 20:30:36 GMT",
"version": "v2"
}
] | 2011-03-22 | [
[
"Reisswig",
"Christian",
""
],
[
"Ott",
"Christian D.",
""
],
[
"Sperhake",
"Ulrich",
""
],
[
"Schnetter",
"Erik",
""
]
] | We perform simulations of general relativistic rotating stellar core collapse and compute the gravitational waves (GWs) emitted in the core bounce phase of three representative models via multiple techniques. The simplest technique, the quadrupole formula (QF), estimates the GW content in the spacetime from the mass qu... |
gr-qc/0406077 | Piotr T. Chru\'sciel | Piotr T. Chrusciel | A poor man's positive energy theorem: II. Null geodesics | Latex2e, 24 A4 pages, minor changes | Class.Quant.Grav. 21 (2004) 4399-4416 | 10.1088/0264-9381/21/18/008 | null | gr-qc | null | We show that positivity of energy for stationary, or strongly uniformly
Schwarzschildian, asymptotically flat, non-singular domains of outer
communications can be proved using Galloway's null rigidity theorem.
| [
{
"created": "Sat, 19 Jun 2004 09:27:07 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Sep 2004 17:16:24 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Chrusciel",
"Piotr T.",
""
]
] | We show that positivity of energy for stationary, or strongly uniformly Schwarzschildian, asymptotically flat, non-singular domains of outer communications can be proved using Galloway's null rigidity theorem. |
gr-qc/0409096 | J\"org Hennig | J. Hennig, G. Neugebauer | An analytic cylindrically symmetric solution for collapsing dust | 8 pages, 1 figure | null | null | null | gr-qc | null | Dust configurations are the simplest models for astrophysical objects. Here
we examine the gravitational collapse of an infinite cylinder of dust and give
an analytic interior solution. Surprisingly, starting with a cylindrically
symmetric ansatz one arrives at a 3-space with constant curvature, i.e. the
resulting me... | [
{
"created": "Mon, 27 Sep 2004 14:24:36 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Hennig",
"J.",
""
],
[
"Neugebauer",
"G.",
""
]
] | Dust configurations are the simplest models for astrophysical objects. Here we examine the gravitational collapse of an infinite cylinder of dust and give an analytic interior solution. Surprisingly, starting with a cylindrically symmetric ansatz one arrives at a 3-space with constant curvature, i.e. the resulting metr... |
gr-qc/0610023 | Jorge Pullin | Miguel Campiglia, Cayetano Di Bartolo, Rodolfo Gambini, Jorge Pullin | Uniform discretizations: a new approach for the quantization of totally
constrained systems | 17 pages, Revtex, no figures, published version | Phys.Rev.D74:124012,2006 | 10.1103/PhysRevD.74.124012 | LSU-REL-100606 | gr-qc | null | We discuss in detail the uniform discretization approach to the quantization
of totally constrained theories. This approach allows to construct the
continuum theory of interest as a well defined, controlled, limit of well
behaved discrete theories. We work out several finite dimensional examples that
exhibit behavior... | [
{
"created": "Fri, 6 Oct 2006 17:09:40 GMT",
"version": "v1"
},
{
"created": "Sat, 8 Sep 2007 15:58:55 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Campiglia",
"Miguel",
""
],
[
"Di Bartolo",
"Cayetano",
""
],
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We discuss in detail the uniform discretization approach to the quantization of totally constrained theories. This approach allows to construct the continuum theory of interest as a well defined, controlled, limit of well behaved discrete theories. We work out several finite dimensional examples that exhibit behaviors ... |
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