id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1301.2570 | Genly Le\'on | Dagoberto Escobar (Camaguey U.), Carlos R. Fadragas (Havana, Central
de Las Villas U.), Genly Leon (Valparaiso U., Catolica) and Yoelsy Leyva
(Valparaiso U., Catolica & Guanajuato U.) | Asymptotic behavior of a scalar field with an arbitrary potential
trapped on a Randall-Sundrum's braneworld: the effect of a negative dark
radiation term on a Bianchi I brane | 32 pages, 14 figures. Title has been changed, sections have been
reordered, discussion has been improved, several references added. The final
publication is available at link.springer.com | Astrophysics and Space Science, Springer Netherlands, 2013, 1-28 | 10.1007/s10509-013-1650-8 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we present a phase space analysis of a quintessence field and a
perfect fluid trapped in a Randall-Sundrum's Braneworld of type 2. We consider
a homogeneous but anisotropic Bianchi I brane geometry. Moreover, we consider
the effect of the projection of the five dimensional Weyl tensor onto the
three-bran... | [
{
"created": "Fri, 11 Jan 2013 18:33:20 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Oct 2013 19:07:17 GMT",
"version": "v2"
}
] | 2013-10-31 | [
[
"Escobar",
"Dagoberto",
"",
"Camaguey U."
],
[
"Fadragas",
"Carlos R.",
"",
"Havana, Central\n de Las Villas U."
],
[
"Leon",
"Genly",
"",
"Valparaiso U., Catolica"
],
[
"Leyva",
"Yoelsy",
"",
"Valparaiso U., Catolica & Guanajuato U."
... | In this work we present a phase space analysis of a quintessence field and a perfect fluid trapped in a Randall-Sundrum's Braneworld of type 2. We consider a homogeneous but anisotropic Bianchi I brane geometry. Moreover, we consider the effect of the projection of the five dimensional Weyl tensor onto the three-brane ... |
2105.09304 | Junpei Harada | Junpei Harada | Emergence of the Cotton tensor for describing gravity | 5 pages, 1 figure, accepted for publication as a Letter in PRD, v2:
typos corrected | Phys. Rev. D 103, L121502 (2021) | 10.1103/PhysRevD.103.L121502 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | It is shown that the Cotton tensor can describe the effects of gravity beyond
general relativity. Any solution of the Einstein equations with or without the
cosmological constant satisfies the field equations described by the Cotton
tensor. It implies that the cosmological constant is an integration constant. A
vacuu... | [
{
"created": "Tue, 18 May 2021 00:00:59 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Jun 2021 03:30:09 GMT",
"version": "v2"
}
] | 2021-06-23 | [
[
"Harada",
"Junpei",
""
]
] | It is shown that the Cotton tensor can describe the effects of gravity beyond general relativity. Any solution of the Einstein equations with or without the cosmological constant satisfies the field equations described by the Cotton tensor. It implies that the cosmological constant is an integration constant. A vacuum ... |
1209.6191 | Chandra Prakash Singh | C.P. Singh, Vijay Singh | Some Exact Solutions of Magnetized viscous model in String Cosmology | 18 pages, 4 figures, paper has been revised | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study anisotropic Bianchi-V universe with magnetic field
and bulk viscous fluid in string cosmology. Exact solutions of the field
equations are obtained by using the equation of state for a cloud of strings,
and a relationship between bulk viscous coefficient and scalar expansion. The
bulk viscous c... | [
{
"created": "Thu, 27 Sep 2012 11:33:50 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Nov 2012 09:25:17 GMT",
"version": "v2"
}
] | 2012-11-28 | [
[
"Singh",
"C. P.",
""
],
[
"Singh",
"Vijay",
""
]
] | In this paper, we study anisotropic Bianchi-V universe with magnetic field and bulk viscous fluid in string cosmology. Exact solutions of the field equations are obtained by using the equation of state for a cloud of strings, and a relationship between bulk viscous coefficient and scalar expansion. The bulk viscous coe... |
gr-qc/0504146 | Bahram Mashhoon | C. Chicone, B. Mashhoon and B. Punsly | Relativistic Motion of Spinning Particles in a Gravitational Field | 12 pages, 2 figures, v2: a few minor typos corrected, accepted for
publication in Phys. Lett. A | Phys.Lett.A343:1-7,2005 | 10.1016/j.physleta.2005.05.072 | null | gr-qc astro-ph | null | The relative motion of a classical relativistic spinning test particle is
studied with respect to a nearby free test particle in the gravitational field
of a rotating source. The effects of the spin-curvature coupling force are
elucidated and the implications of the results for the motion of rotating
plasma clumps in... | [
{
"created": "Fri, 29 Apr 2005 18:29:21 GMT",
"version": "v1"
},
{
"created": "Tue, 24 May 2005 20:22:49 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Chicone",
"C.",
""
],
[
"Mashhoon",
"B.",
""
],
[
"Punsly",
"B.",
""
]
] | The relative motion of a classical relativistic spinning test particle is studied with respect to a nearby free test particle in the gravitational field of a rotating source. The effects of the spin-curvature coupling force are elucidated and the implications of the results for the motion of rotating plasma clumps in a... |
gr-qc/0201002 | Dr Simon Brian Davis | Simon Davis and Hugh Luckock | The quantum theory of a quadratic gravity action for heterotic strings | 12 pages. Renormalizability properties of the action are clarified
and a third-order differential equation for the wave function $\Psi$ with a
dependence on the potential $V(\Phi)$ is included | Gen.Rel.Grav. 34 (2002) 1751-1765 | null | University of Sydney Report 2001-17 | gr-qc | null | The wave function for the quadratic gravity theory derived from the heterotic
string effective action is deduced to first order in ${{e^{-\Phi}}\over
{g_4^2}}$ by solving a perturbed second-order Wheeler-DeWitt equation, assuming
that the potential is slowly varying with respect to $\Phi$. Predictions for
inflation b... | [
{
"created": "Mon, 31 Dec 2001 21:57:05 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Feb 2002 17:41:21 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Davis",
"Simon",
""
],
[
"Luckock",
"Hugh",
""
]
] | The wave function for the quadratic gravity theory derived from the heterotic string effective action is deduced to first order in ${{e^{-\Phi}}\over {g_4^2}}$ by solving a perturbed second-order Wheeler-DeWitt equation, assuming that the potential is slowly varying with respect to $\Phi$. Predictions for inflation bas... |
1409.3146 | Angnis Schmidt-May | Angnis Schmidt-May | Mass eigenstates in bimetric theory with matter coupling | Latex, 22 pages, new section 4.2.1 included, v3 matches published
version | JCAP 01 (2015) 039 | 10.1088/1475-7516/2015/01/039 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the ghost-free bimetric action extended by a recently
proposed coupling to matter through a composite metric. The equations of motion
for this theory are derived using a method which avoids varying the square-root
matrix that appears in the matter coupling. We make an ansatz for which the
metri... | [
{
"created": "Tue, 9 Sep 2014 16:14:25 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Sep 2014 08:23:56 GMT",
"version": "v2"
},
{
"created": "Fri, 30 Jan 2015 10:23:49 GMT",
"version": "v3"
}
] | 2015-02-17 | [
[
"Schmidt-May",
"Angnis",
""
]
] | In this paper we study the ghost-free bimetric action extended by a recently proposed coupling to matter through a composite metric. The equations of motion for this theory are derived using a method which avoids varying the square-root matrix that appears in the matter coupling. We make an ansatz for which the metrics... |
1707.00273 | Anupam Mazumdar | Alexey S. Koshelev and Anupam Mazumdar | Do massive compact objects without event horizon exist in infinite
derivative gravity? | 5 pages, Accepted version for the journal | null | 10.1103/PhysRevD.96.084069 | null | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein's General theory of relativity is plagued by cosmological and
blackhole type singularities Recently, it has been shown that infinite
derivative, ghost free, gravity can yield non-singular cosmological and
mini-blackhole solutions. In particular, the theory possesses a {\it mass-gap}
determined by the scale o... | [
{
"created": "Sun, 2 Jul 2017 10:14:14 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Oct 2017 13:55:05 GMT",
"version": "v2"
}
] | 2017-11-22 | [
[
"Koshelev",
"Alexey S.",
""
],
[
"Mazumdar",
"Anupam",
""
]
] | Einstein's General theory of relativity is plagued by cosmological and blackhole type singularities Recently, it has been shown that infinite derivative, ghost free, gravity can yield non-singular cosmological and mini-blackhole solutions. In particular, the theory possesses a {\it mass-gap} determined by the scale of ... |
gr-qc/0010002 | Katsuhito Yasuno | Katsuhito Yasuno, Tatsuhiko Koike and Masaru Siino | Thurston's Geometrization Conjecture and cosmological models | 18 pages, no figures, LaTex 2e, IOP style, Submitted to Class.
Quantum Grav | Class.Quant.Grav. 18 (2001) 1405-1420 | 10.1088/0264-9381/18/8/301 | null | gr-qc | null | We investigate a class of spatially compact inhomogeneous spacetimes.
Motivated by Thurston's Geometrization Conjecture, we give a formulation for
constructing spatially compact composite spacetimes as solutions for the
Einstein equations. Such composite spacetimes are built from the spatially
compact locally homogen... | [
{
"created": "Sun, 1 Oct 2000 16:47:35 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Yasuno",
"Katsuhito",
""
],
[
"Koike",
"Tatsuhiko",
""
],
[
"Siino",
"Masaru",
""
]
] | We investigate a class of spatially compact inhomogeneous spacetimes. Motivated by Thurston's Geometrization Conjecture, we give a formulation for constructing spatially compact composite spacetimes as solutions for the Einstein equations. Such composite spacetimes are built from the spatially compact locally homogeneo... |
2010.13480 | Johannes M\"unch | Johannes M\"unch | Effective Quantum Dust Collapse via Surface Matching | 40 pages, 23 figures. Version accepted for publication in CQG. Minor
changes, clarifications added | null | 10.1088/1361-6382/ac103e | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The fate of matter forming a black hole is still an open problem, although
models of quantum gravity corrected black holes are available. In loop quantum
gravity (LQG) models were presented, which resolve the classical singularity in
the centre of the black hole by means of a black-to-white hole transition, but
negle... | [
{
"created": "Mon, 26 Oct 2020 10:57:18 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Aug 2021 11:35:32 GMT",
"version": "v2"
}
] | 2021-08-17 | [
[
"Münch",
"Johannes",
""
]
] | The fate of matter forming a black hole is still an open problem, although models of quantum gravity corrected black holes are available. In loop quantum gravity (LQG) models were presented, which resolve the classical singularity in the centre of the black hole by means of a black-to-white hole transition, but neglect... |
1308.0687 | Julian Rennert | Julian Rennert, David Sloan | Anisotropic Spinfoam Cosmology | 31 pages, 1 figure, v2: substantial improvements. references added.
journal version | Class. Quantum Grav. 31 (2014) 015017 | 10.1088/0264-9381/31/1/015017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of a homogeneous, anisotropic universe are investigated within
the context of spinfoam cosmology. Transition amplitudes are calculated for a
graph consisting of a single node and three links - the `Daisy graph' - probing
the behaviour a classical Bianchi I spacetime. It is shown further how the use
of su... | [
{
"created": "Sat, 3 Aug 2013 11:59:36 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Nov 2013 18:40:01 GMT",
"version": "v2"
}
] | 2013-11-21 | [
[
"Rennert",
"Julian",
""
],
[
"Sloan",
"David",
""
]
] | The dynamics of a homogeneous, anisotropic universe are investigated within the context of spinfoam cosmology. Transition amplitudes are calculated for a graph consisting of a single node and three links - the `Daisy graph' - probing the behaviour a classical Bianchi I spacetime. It is shown further how the use of such... |
1504.05789 | Lorenzo Iorio | Lorenzo Iorio | Editorial for the Special Issue 100 Years of Chronogeometrodynamics: The
Status of the Einstein's Theory of Gravitation in Its Centennial Year | LaTex2e, 41 pages, no figures, no tables, 314 references,
peer-reviewed. Accepted for publication in Universe | Universe 1:38 2015 | 10.3390/universe1010038 | null | gr-qc astro-ph.CO physics.hist-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present Editorial introduces the Special Issue dedicated by the journal
Universe to the General Theory of Relativity, the beautiful theory of
gravitation of Einstein, a century after its birth. It reviews some of its key
features in a historical perspective, and, in welcoming distinguished
researchers from all ov... | [
{
"created": "Tue, 21 Apr 2015 12:24:32 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Apr 2015 19:28:32 GMT",
"version": "v2"
}
] | 2015-04-24 | [
[
"Iorio",
"Lorenzo",
""
]
] | The present Editorial introduces the Special Issue dedicated by the journal Universe to the General Theory of Relativity, the beautiful theory of gravitation of Einstein, a century after its birth. It reviews some of its key features in a historical perspective, and, in welcoming distinguished researchers from all over... |
gr-qc/0210012 | Thomas W. Baumgarte | Nicholas D. Lyford, Thomas W. Baumgarte and Stuart L. Shapiro | Effects of Differential Rotation on the Maximum Mass of Neutron Stars | 6 pages, to appear in ApJ | Astrophys.J.583:410-415,2003 | 10.1086/345350 | null | gr-qc astro-ph | null | The merger of binary neutron stars is likely to lead to differentially
rotating remnants. In this paper we numerically construct models of
differentially rotating neutron stars in general relativity and determine their
maximum allowed mass. We model the stars adopting a polytropic equation of
state and tabulate maxim... | [
{
"created": "Thu, 3 Oct 2002 20:06:31 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Lyford",
"Nicholas D.",
""
],
[
"Baumgarte",
"Thomas W.",
""
],
[
"Shapiro",
"Stuart L.",
""
]
] | The merger of binary neutron stars is likely to lead to differentially rotating remnants. In this paper we numerically construct models of differentially rotating neutron stars in general relativity and determine their maximum allowed mass. We model the stars adopting a polytropic equation of state and tabulate maximum... |
2008.13308 | Matt Visser | Thomas Berry (Victoria University of Wellington), Alex Simpson
(Victoria University of Wellington), and Matt Visser (Victoria University of
Wellington) | Photon spheres, ISCOs, and OSCOs: Astrophysical observables for regular
black holes with asymptotically Minkowski cores | V1: 24 pages. 6 figures. V2: Two references added; one reference
updated; no physics changes | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Classical black holes contain a singularity at their core. This has prompted
various researchers to propose a multitude of modified spacetimes that mimic
the physically observable characteristics of classical black holes as best as
possible, but that crucially do not contain singularities at their cores. Due
to recen... | [
{
"created": "Mon, 31 Aug 2020 01:03:36 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Sep 2020 07:33:07 GMT",
"version": "v2"
}
] | 2020-09-08 | [
[
"Berry",
"Thomas",
"",
"Victoria University of Wellington"
],
[
"Simpson",
"Alex",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of\n Wellington"
]
] | Classical black holes contain a singularity at their core. This has prompted various researchers to propose a multitude of modified spacetimes that mimic the physically observable characteristics of classical black holes as best as possible, but that crucially do not contain singularities at their cores. Due to recent ... |
2309.06232 | Jo\~ao Lu\'is Rosa | Jo\~ao Lu\'is Rosa, Tom Zlosnik | Dynamical system analysis of cosmological evolution in the Aether scalar
tensor theory | 18 pages, 8 figures | Phys. Rev. D 109, 024018 (2024) | 10.1103/PhysRevD.109.024018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Aether Scalar Tensor (AeST) theory is an extension of General Relativity
(GR), proposed for addressing galactic and cosmological observations without
dark matter.The action for the theory includes a function that can currently
only be constrained by phenomenological considerations. In antecedent work,
forms of th... | [
{
"created": "Tue, 12 Sep 2023 13:50:04 GMT",
"version": "v1"
}
] | 2024-01-18 | [
[
"Rosa",
"João Luís",
""
],
[
"Zlosnik",
"Tom",
""
]
] | The Aether Scalar Tensor (AeST) theory is an extension of General Relativity (GR), proposed for addressing galactic and cosmological observations without dark matter.The action for the theory includes a function that can currently only be constrained by phenomenological considerations. In antecedent work, forms of this... |
1002.4246 | Dong-han Yeom | Dong-il Hwang, Dong-han Yeom | Responses of the Brans-Dicke field due to gravitational collapses | 28 pages, 14 figures | Class.Quant.Grav.27:205002,2010 | 10.1088/0264-9381/27/20/205002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study responses of the Brans-Dicke field due to gravitational collapses of
scalar field pulses using numerical simulations. Double-null formalism is
employed to implement the numerical simulations. If we supply a scalar field
pulse, it will asymptotically form a black hole via dynamical interactions of
the Brans-D... | [
{
"created": "Tue, 23 Feb 2010 05:37:41 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Aug 2010 07:19:16 GMT",
"version": "v2"
}
] | 2015-05-18 | [
[
"Hwang",
"Dong-il",
""
],
[
"Yeom",
"Dong-han",
""
]
] | We study responses of the Brans-Dicke field due to gravitational collapses of scalar field pulses using numerical simulations. Double-null formalism is employed to implement the numerical simulations. If we supply a scalar field pulse, it will asymptotically form a black hole via dynamical interactions of the Brans-Dic... |
2207.00226 | Indranil Chakraborty | Indranil Chakraborty, Soumya Bhattacharya, Sumanta Chakraborty | Gravitational wave memory in wormhole spacetimes | Some additions and clarifications, matches with the published version
in Phys. Rev. D | Phys. Rev. D 106, 104057, 2022 | 10.1103/PhysRevD.106.104057 | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | Gravitational wave memory is studied in the context of a certain class of
braneworld wormholes. Unlike other wormhole geometries, this novel class of
wormholes do not require any exotic matter fields for its traversability.
First, we study geodesics in this wormhole spacetime, in the presence of a
gravitational wave ... | [
{
"created": "Fri, 1 Jul 2022 06:39:42 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Nov 2022 15:26:40 GMT",
"version": "v2"
}
] | 2022-12-02 | [
[
"Chakraborty",
"Indranil",
""
],
[
"Bhattacharya",
"Soumya",
""
],
[
"Chakraborty",
"Sumanta",
""
]
] | Gravitational wave memory is studied in the context of a certain class of braneworld wormholes. Unlike other wormhole geometries, this novel class of wormholes do not require any exotic matter fields for its traversability. First, we study geodesics in this wormhole spacetime, in the presence of a gravitational wave pu... |
1601.05386 | Istvan Racz | Istv\'an R\'acz and Jeffrey Winicour | On solving the constraints by integrating a strongly hyperbolic system | 16 pages, no figures, typos corrected | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was shown recently that the constraints on the initial data for Einstein's
equations may be posed as an evolutionary problem [9]. In one of the proposed
two methods the constraints can be replaced by a first order symmetrizable
hyperbolic system and a subsidiary algebraic relation. Here, by assuming that
the initi... | [
{
"created": "Wed, 20 Jan 2016 19:46:10 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Feb 2016 22:49:16 GMT",
"version": "v2"
}
] | 2016-02-09 | [
[
"Rácz",
"István",
""
],
[
"Winicour",
"Jeffrey",
""
]
] | It was shown recently that the constraints on the initial data for Einstein's equations may be posed as an evolutionary problem [9]. In one of the proposed two methods the constraints can be replaced by a first order symmetrizable hyperbolic system and a subsidiary algebraic relation. Here, by assuming that the initial... |
1206.3807 | Kristina Giesel | Kristina Giesel, Thomas Thiemann | Scalar Material Reference Systems and Loop Quantum Gravity | 28 pages, some references were corrected | 2015 Class. Quantum Grav. 32 135015 | 10.1088/0264-9381/32/13/135015 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the past, the possibility to employ (scalar) material reference systems in
order to describe classical and quantum gravity directly in terms of gauge
invariant (Dirac) observables has been emphasised frequently. This idea has
been picked up more recently in Loop Quantum Gravity (LQG) with the aim to
perform a redu... | [
{
"created": "Sun, 17 Jun 2012 23:32:50 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Jun 2012 22:04:07 GMT",
"version": "v2"
}
] | 2022-12-05 | [
[
"Giesel",
"Kristina",
""
],
[
"Thiemann",
"Thomas",
""
]
] | In the past, the possibility to employ (scalar) material reference systems in order to describe classical and quantum gravity directly in terms of gauge invariant (Dirac) observables has been emphasised frequently. This idea has been picked up more recently in Loop Quantum Gravity (LQG) with the aim to perform a reduce... |
gr-qc/0309093 | Stephane Fay | Stephane Fay | Exact solutions of the Hyperextended Scalar Tensor theory with potential
in the Bianchi type I model | 13 pages, 1 figure | Class. Quant Grav., Vol 18, 1, 2001 | null | null | gr-qc | null | The Hyperextended Scalar Tensor theory with a potential is defined by three
free functions: the gravitational function, the Brans-Dicke coupling function
and the potential. Starting from the expression of the 3-volume and the
potential as function of the proper time, we determine the exact solutions of
this theory. W... | [
{
"created": "Fri, 19 Sep 2003 12:06:07 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Fay",
"Stephane",
""
]
] | The Hyperextended Scalar Tensor theory with a potential is defined by three free functions: the gravitational function, the Brans-Dicke coupling function and the potential. Starting from the expression of the 3-volume and the potential as function of the proper time, we determine the exact solutions of this theory. We ... |
1811.03209 | Sreenath Kizhakkumpurath Manikandan | Sreenath K. Manikandan and Andrew N. Jordan | Bosons falling into a black hole: A superfluid analogue | 11 pages, 4 figures | Phys. Rev. D 98, 124043 (2018) | 10.1103/PhysRevD.98.124043 | null | gr-qc cond-mat.quant-gas quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose an analogy between the quantum physics of a black hole in its late
stages of the evaporation process and a superfluid Bose Einstein Condensate
(BEC), based on the Horowitz and Maldacena quantum final state projection model
[JHEP 2004(02), 008]. The superfluid region is considered to be analogous to
the int... | [
{
"created": "Thu, 8 Nov 2018 01:25:27 GMT",
"version": "v1"
}
] | 2019-01-02 | [
[
"Manikandan",
"Sreenath K.",
""
],
[
"Jordan",
"Andrew N.",
""
]
] | We propose an analogy between the quantum physics of a black hole in its late stages of the evaporation process and a superfluid Bose Einstein Condensate (BEC), based on the Horowitz and Maldacena quantum final state projection model [JHEP 2004(02), 008]. The superfluid region is considered to be analogous to the inter... |
gr-qc/9906057 | Motomu Tsuda | Motomu Tsuda | Generalized Lagrangian of N = 1 supergravity and its canonical
constraints with the real Ashtekar variable | 17 pages, LATEX | Phys.Rev. D61 (2000) 024025 | 10.1103/PhysRevD.61.024025 | STUPP-99-157 | gr-qc | null | We generalize the Lagrangian of N = 1 supergravity (SUGRA) by using an
arbitrary parameter $\xi$, which corresponds to the inverse of Barbero's
parameter $\beta$. This generalized Lagrangian involves the chiral one as a
special case of the value $\xi = \pm i$. We show that the generalized
Lagrangian gives the canonic... | [
{
"created": "Wed, 16 Jun 1999 06:21:30 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Tsuda",
"Motomu",
""
]
] | We generalize the Lagrangian of N = 1 supergravity (SUGRA) by using an arbitrary parameter $\xi$, which corresponds to the inverse of Barbero's parameter $\beta$. This generalized Lagrangian involves the chiral one as a special case of the value $\xi = \pm i$. We show that the generalized Lagrangian gives the canonical... |
1911.13031 | Adrien Bourgoin | Adrien Bourgoin | General expansion of time transfer functions in optical spacetime | null | Phys. Rev. D 101, 064035 (2020) | 10.1103/PhysRevD.101.064035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When dealing with highly accurate modeling of time and frequency transfers
into arbitrarily moving dielectrics medium, it may be convenient to work with
Gordon's optical spacetime metric rather than the usual physical spacetime
metric. Additionally, an accurate modeling of the geodesic evolution of
observable quantit... | [
{
"created": "Fri, 29 Nov 2019 10:09:17 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Feb 2020 11:18:44 GMT",
"version": "v2"
}
] | 2020-03-25 | [
[
"Bourgoin",
"Adrien",
""
]
] | When dealing with highly accurate modeling of time and frequency transfers into arbitrarily moving dielectrics medium, it may be convenient to work with Gordon's optical spacetime metric rather than the usual physical spacetime metric. Additionally, an accurate modeling of the geodesic evolution of observable quantitie... |
2201.09902 | Sebastian Steinhaus | Courtney Allen and Florian Girelli and Sebastian Steinhaus | Numerical evaluation of spin foam amplitudes beyond simplices | 23 pages, 17 figures, v2: added references to code and dataset | Phys.Rev.D 105 (2022) 6, 066003 | 10.1103/PhysRevD.105.066003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first numerical calculation of the 4D Euclidean spin foam
vertex amplitude for vertices with hypercubic combinatorics. Concretely, we
compute the amplitude for coherent boundary data peaked on cuboid and frustum
shapes. We present the numerical algorithms to explicitly compute the vertex
amplitude and ... | [
{
"created": "Mon, 24 Jan 2022 19:00:11 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Feb 2022 13:45:40 GMT",
"version": "v2"
}
] | 2022-03-16 | [
[
"Allen",
"Courtney",
""
],
[
"Girelli",
"Florian",
""
],
[
"Steinhaus",
"Sebastian",
""
]
] | We present the first numerical calculation of the 4D Euclidean spin foam vertex amplitude for vertices with hypercubic combinatorics. Concretely, we compute the amplitude for coherent boundary data peaked on cuboid and frustum shapes. We present the numerical algorithms to explicitly compute the vertex amplitude and co... |
1310.7454 | Katherine Grover | K. Grover, S. Fairhurst, B. F. Farr, I. Mandel, C. Rodriguez, T.
Sidery, and A. Vecchio | Comparison of Gravitational Wave Detector Network Sky Localization
Approximations | 11 pages, 7 Figures | null | 10.1103/PhysRevD.89.042004 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves emitted during compact binary coalescences are a
promising source for gravitational-wave detector networks. The accuracy with
which the location of the source on the sky can be inferred from gravitational
wave data is a limiting factor for several potential scientific goals of
gravitational-wave a... | [
{
"created": "Mon, 28 Oct 2013 15:16:42 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Grover",
"K.",
""
],
[
"Fairhurst",
"S.",
""
],
[
"Farr",
"B. F.",
""
],
[
"Mandel",
"I.",
""
],
[
"Rodriguez",
"C.",
""
],
[
"Sidery",
"T.",
""
],
[
"Vecchio",
"A.",
""
]
] | Gravitational waves emitted during compact binary coalescences are a promising source for gravitational-wave detector networks. The accuracy with which the location of the source on the sky can be inferred from gravitational wave data is a limiting factor for several potential scientific goals of gravitational-wave ast... |
gr-qc/9409018 | Lau Yun-kau | Y.K.Lau | How Objective is Black Hole Entropy? | Latex file, 10 pages | null | null | null | gr-qc | null | The objectivity of black hole entropy is discussed in the particular case of
a Schwarzchild black hole. Using Jaynes' maximum entropy formalism and
Euclidean path integral evaluation of partition function, it is argued that in
the semiclassical limit when the fluctutation of metric is neglected, the black
hole entrop... | [
{
"created": "Sat, 10 Sep 1994 16:26:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lau",
"Y. K.",
""
]
] | The objectivity of black hole entropy is discussed in the particular case of a Schwarzchild black hole. Using Jaynes' maximum entropy formalism and Euclidean path integral evaluation of partition function, it is argued that in the semiclassical limit when the fluctutation of metric is neglected, the black hole entropy ... |
1206.1408 | Mustapha Azreg-A\"inou | Mustapha Azreg-A\"inou | Rotation and twist regular modes for trapped ghosts | 11 pages, 3 figures; General Relativity and Gravitation - 2012 | null | 10.1007/s10714-012-1390-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A parameter-independent notion of stationary slow motion is formulated then
applied to the case of stationary rotation of massless trapped ghosts. The
excitations correspond to a rotation mode with angular momentum $J\neq 0$ and
twist modes. It is found that the rotation mode, which has no parity, causes
excess in th... | [
{
"created": "Thu, 7 Jun 2012 07:05:35 GMT",
"version": "v1"
}
] | 2012-06-08 | [
[
"Azreg-Aïnou",
"Mustapha",
""
]
] | A parameter-independent notion of stationary slow motion is formulated then applied to the case of stationary rotation of massless trapped ghosts. The excitations correspond to a rotation mode with angular momentum $J\neq 0$ and twist modes. It is found that the rotation mode, which has no parity, causes excess in the ... |
2007.13206 | Fay Dowker | Fay Dowker | Boundary contributions in the causal set action | 21 pages, 4 figures. Second version with arXiv reference added and
typos corrected | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Evidence is provided for a conjecture that, in the continuum limit, the mean
of the causal set action of a causal set sprinkled into a globally hyperbolic
Lorentzian spacetime, M, of finite volume equals the Einstein Hilbert action of
M plus the volume of the co-dimension 2 intersection of the future boundary
with th... | [
{
"created": "Sun, 26 Jul 2020 20:05:41 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jul 2020 08:31:48 GMT",
"version": "v2"
}
] | 2020-07-29 | [
[
"Dowker",
"Fay",
""
]
] | Evidence is provided for a conjecture that, in the continuum limit, the mean of the causal set action of a causal set sprinkled into a globally hyperbolic Lorentzian spacetime, M, of finite volume equals the Einstein Hilbert action of M plus the volume of the co-dimension 2 intersection of the future boundary with the ... |
gr-qc/9907035 | Zhang Yuan-zhong | Ke-Jian Jin, Yuan-Zhong Zhang, and Zong-Hong Zhu | Gravitational Lensing Effects of Fermion-Fermion Stars: I. Strong Field
Case | 7 pages, LaTex and PostScript; 4 figures, PostScript | Phys.Lett. A264 (2000) 335-340 | 10.1016/S0375-9601(99)00830-0 | null | gr-qc | null | We investigate a two-component model for gravitational lenses, i.e., the
fermion-fermion star as a dark matter self-gravitating system made from two
kinds of fermions with different masses. We calculate the deflection angles
varying from arcseconds to even degrees. There is one Einstein ring. In
particular, we find t... | [
{
"created": "Thu, 8 Jul 1999 11:30:29 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Jin",
"Ke-Jian",
""
],
[
"Zhang",
"Yuan-Zhong",
""
],
[
"Zhu",
"Zong-Hong",
""
]
] | We investigate a two-component model for gravitational lenses, i.e., the fermion-fermion star as a dark matter self-gravitating system made from two kinds of fermions with different masses. We calculate the deflection angles varying from arcseconds to even degrees. There is one Einstein ring. In particular, we find thr... |
2302.05704 | Prosenjit Paul | Prosenjit Paul, S. I. Kruglov | Thermodynamics of BTZ Black Holes in Nonlinear Electrodynamics | 12 pages, 14 figures, Published in Indian Journal of Physics | Indian Journal of Physics 98, (2024) | 10.1007/s12648-023-02946-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate electrically charged black holes in $(2+1)$ dimensional
gravity coupled to nonlinear electrodynamics (NED). The metric function $f(r)$
is depicted, showing that there can be one or two horizons. We study black hole
thermodynamics in extended phase space. The cosmological constant played the
role of the... | [
{
"created": "Sat, 11 Feb 2023 14:36:32 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Sep 2023 06:54:30 GMT",
"version": "v2"
}
] | 2024-07-02 | [
[
"Paul",
"Prosenjit",
""
],
[
"Kruglov",
"S. I.",
""
]
] | We investigate electrically charged black holes in $(2+1)$ dimensional gravity coupled to nonlinear electrodynamics (NED). The metric function $f(r)$ is depicted, showing that there can be one or two horizons. We study black hole thermodynamics in extended phase space. The cosmological constant played the role of therm... |
2305.01676 | Jerome Quintin | Ghazal Geshnizjani, Eric Ling, Jerome Quintin | On the initial singularity and extendibility of flat quasi-de Sitter
spacetimes | 62 pages, 6 figures; v2: minor corrections and references added,
matches published version | J. High Energ. Phys. 2023, 182 (2023) | 10.1007/JHEP10(2023)182 | CPH-GEOTOP-DNRF151; CF21-0680 | gr-qc hep-th math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inflationary spacetimes have been argued to be past geodesically incomplete
in many situations. However, whether the geodesic incompleteness implies the
existence of an initial spacetime curvature singularity or whether the
spacetime may be extended (potentially into another phase of the universe) is
generally unknow... | [
{
"created": "Tue, 2 May 2023 18:00:00 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Nov 2023 14:20:55 GMT",
"version": "v2"
}
] | 2023-11-02 | [
[
"Geshnizjani",
"Ghazal",
""
],
[
"Ling",
"Eric",
""
],
[
"Quintin",
"Jerome",
""
]
] | Inflationary spacetimes have been argued to be past geodesically incomplete in many situations. However, whether the geodesic incompleteness implies the existence of an initial spacetime curvature singularity or whether the spacetime may be extended (potentially into another phase of the universe) is generally unknown.... |
2402.08937 | Jorge Gigante Valcarcel | Sebastian Bahamonde, Jorge Gigante Valcarcel | Stability of Poincar\'e gauge theory with cubic order invariants | 16 pages, minor changes, references added. It matches the version
published in PRD | Phys. Rev. D 109 (2024) 10, 104075 | 10.1103/PhysRevD.109.104075 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the stability of the vector and axial sectors of Poincar\'e gauge
theory around general backgrounds in the presence of cubic order invariants
defined from the curvature and torsion tensors, showing how the latter can in
fact cancel out well-known instabilities arising from the quadratic curvature
invariant... | [
{
"created": "Wed, 14 Feb 2024 04:42:19 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Jun 2024 20:03:28 GMT",
"version": "v2"
}
] | 2024-06-05 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Valcarcel",
"Jorge Gigante",
""
]
] | We analyse the stability of the vector and axial sectors of Poincar\'e gauge theory around general backgrounds in the presence of cubic order invariants defined from the curvature and torsion tensors, showing how the latter can in fact cancel out well-known instabilities arising from the quadratic curvature invariants ... |
1505.01285 | Dirk Puetzfeld | Dirk Puetzfeld, Yuri N. Obukhov | Equivalence principle in scalar-tensor gravity | 5 pages, RevTex format | Phys. Rev. D 92, 081502 (2015) | 10.1103/PhysRevD.92.081502 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a direct confirmation of the validity of the equivalence principle
for unstructured test bodies in scalar tensor gravity. Our analysis is
complementary to previous approaches and valid for a large class of
scalar-tensor theories of gravitation. A covariant approach is used to derive
the equations of motion... | [
{
"created": "Wed, 6 May 2015 08:51:13 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Oct 2015 18:38:45 GMT",
"version": "v2"
}
] | 2015-10-21 | [
[
"Puetzfeld",
"Dirk",
""
],
[
"Obukhov",
"Yuri N.",
""
]
] | We present a direct confirmation of the validity of the equivalence principle for unstructured test bodies in scalar tensor gravity. Our analysis is complementary to previous approaches and valid for a large class of scalar-tensor theories of gravitation. A covariant approach is used to derive the equations of motion i... |
gr-qc/0701175 | Jian-Yang Zhu | Jian-Zhen Chen and Jian-Yang Zhu | Self-organized critical behavior: the evolution of frozen spin networks
model in quantum gravity | 5 pages, 5 figures | Int.J.Mod.Phys.A23:3891-3899,2008 | 10.1142/S0217751X0804041X | null | gr-qc | null | In quantum gravity, we study the evolution of a two-dimensional planar open
frozen spin network, in which the color (i.e. the twice spin of an edge)
labeling edge changes but the underlying graph remains fixed. The mainly
considered evolution rule, the random edge model, is depending on choosing an
edge randomly and ... | [
{
"created": "Wed, 31 Jan 2007 17:00:02 GMT",
"version": "v1"
}
] | 2009-01-06 | [
[
"Chen",
"Jian-Zhen",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | In quantum gravity, we study the evolution of a two-dimensional planar open frozen spin network, in which the color (i.e. the twice spin of an edge) labeling edge changes but the underlying graph remains fixed. The mainly considered evolution rule, the random edge model, is depending on choosing an edge randomly and ch... |
1503.04659 | Mariafelicia De Laurentis Professor | Mariafelicia De Laurentis, Mariacristina Paolella, Salvatore
Capozziello | Cosmological inflation in $F(R,\mathcal{G})$ gravity | 9 pages, 5 figures, to be published in Phys. Rev. D | null | 10.1103/PhysRevD.91.083531 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmological inflation is discussed in the framework of $F(R,{\cal G})$
gravity where $F$ is a generic function of the curvature scalar $R$ and the
Gauss-Bonnet topological invariant $\cal G$. The main feature that emerges in
this analysis is the fact that this kind of theory can exhaust all the
curvature budget rela... | [
{
"created": "Thu, 12 Mar 2015 10:03:09 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Apr 2015 09:13:08 GMT",
"version": "v2"
}
] | 2015-06-24 | [
[
"De Laurentis",
"Mariafelicia",
""
],
[
"Paolella",
"Mariacristina",
""
],
[
"Capozziello",
"Salvatore",
""
]
] | Cosmological inflation is discussed in the framework of $F(R,{\cal G})$ gravity where $F$ is a generic function of the curvature scalar $R$ and the Gauss-Bonnet topological invariant $\cal G$. The main feature that emerges in this analysis is the fact that this kind of theory can exhaust all the curvature budget relate... |
1109.6649 | Mayeul Arminjon | Mayeul Arminjon and Frank Reifler | Classical-quantum correspondence and wave packet solutions of the Dirac
equation in a curved spacetime | 13 pages (standard 12pt). Text of a talk given at the "Geometry,
Integrability & Quantization" Conference, Varna (Bulgaria), June 2011 | J. of Geometry & Symmetry in Physics 24 (2011) pp. 77-88 | null | null | gr-qc math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The idea of wave mechanics leads naturally to assume the well-known relation
$E=\hbar \omega $ in the specific form $H=\hbar W$, where $H$ is the classical
Hamiltonian of a particle and $W$ is the dispersion relation of the sought-for
wave equation. We derive the expression of $H$ in a curved spacetime with an
electr... | [
{
"created": "Thu, 29 Sep 2011 13:20:19 GMT",
"version": "v1"
}
] | 2012-07-19 | [
[
"Arminjon",
"Mayeul",
""
],
[
"Reifler",
"Frank",
""
]
] | The idea of wave mechanics leads naturally to assume the well-known relation $E=\hbar \omega $ in the specific form $H=\hbar W$, where $H$ is the classical Hamiltonian of a particle and $W$ is the dispersion relation of the sought-for wave equation. We derive the expression of $H$ in a curved spacetime with an electrom... |
2006.04892 | Piero Nicolini | Bernard Carr, Heather Mentzer, Jonas Mureika, Piero Nicolini | Self-complete and GUP-Modified Charged and Spinning Black Holes | 18 pages, 10 figures: v2: minor corrections | Eur. Phys. J. C (2020) 80:1166 | 10.1140/epjc/s10052-020-08706-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore some implications of our previous proposal, motivated in part by
the Generalised Uncertainty Principle (GUP) and the possibility that black
holes have quantum mechanical hair that the ADM mass of a system has the form
$M + \beta M_\mathrm{Pl}^2/(2M)$, where $M$ is the bare mass, $M_\mathrm{Pl}$
is the Plan... | [
{
"created": "Mon, 8 Jun 2020 19:24:31 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Dec 2020 14:17:36 GMT",
"version": "v2"
}
] | 2020-12-22 | [
[
"Carr",
"Bernard",
""
],
[
"Mentzer",
"Heather",
""
],
[
"Mureika",
"Jonas",
""
],
[
"Nicolini",
"Piero",
""
]
] | We explore some implications of our previous proposal, motivated in part by the Generalised Uncertainty Principle (GUP) and the possibility that black holes have quantum mechanical hair that the ADM mass of a system has the form $M + \beta M_\mathrm{Pl}^2/(2M)$, where $M$ is the bare mass, $M_\mathrm{Pl}$ is the Planck... |
gr-qc/0103049 | Ettore Minguzzi | E. Minguzzi | On the Conventionality of Simultaneity | 17 pages, 3 figures, LaTeX. v3: Final version, accepted for
publication in the April issue of Found. Phys. Lett | Found.Phys.Lett. 15 (2002) 153-169 | 10.1023/A:1020900108093 | null | gr-qc | null | Starting from the experimental fact that light propagates over a closed path
at speed c (L/c law), we show to what extent the isotropy of the speed of light
can be considered a matter of convention. We prove the consistence of
anisotropic and inhomogenous conventions, limiting the allowed possibilities.
All conventio... | [
{
"created": "Wed, 14 Mar 2001 20:58:54 GMT",
"version": "v1"
},
{
"created": "Sat, 5 May 2001 22:34:12 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Feb 2002 17:56:16 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Minguzzi",
"E.",
""
]
] | Starting from the experimental fact that light propagates over a closed path at speed c (L/c law), we show to what extent the isotropy of the speed of light can be considered a matter of convention. We prove the consistence of anisotropic and inhomogenous conventions, limiting the allowed possibilities. All conventions... |
gr-qc/9809080 | Renato Klippert Barcellos | R. Klippert, V.A. De Lorenci (EFEI/Itajuba) M. Novello, J.M. Salim
(CBPF) | On the self-consistence of electrodynamics in the early universe | 10 pages, LaTeX2e with ws-p9-75x6-50.cls (included), improved version
presented in the IX Marcel Grossmann Meeting on General Relativity (Italy,
July 2000) Journal-refby: proceedings of IX Marcel Grossmann Meeting, part C,
1987 V.G. Gurzadyan, R.T. Jantzen and R. Ruffini editors, World Scientific,
Singapore, 20... | null | null | null | gr-qc | null | The issue of a self-consistent solution of Maxwell-Einstein equations
achieves a very simple form when all quantum effects are neglected but a weak
vacuum polarization due to an external magnetic field is taken into account.
From a semi-classical point of view this means to deal with an appropriate
limit of the one... | [
{
"created": "Mon, 28 Sep 1998 22:32:48 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Mar 2002 19:02:27 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Klippert",
"R.",
"",
"EFEI/Itajuba"
],
[
"De Lorenci",
"V. A.",
"",
"EFEI/Itajuba"
],
[
"Novello",
"M.",
"",
"CBPF"
],
[
"Salim",
"J. M.",
"",
"CBPF"
]
] | The issue of a self-consistent solution of Maxwell-Einstein equations achieves a very simple form when all quantum effects are neglected but a weak vacuum polarization due to an external magnetic field is taken into account. From a semi-classical point of view this means to deal with an appropriate limit of the one-loo... |
1410.3852 | Tyson Littenberg | Tyson B. Littenberg and Neil J. Cornish | BayesLine: Bayesian Inference for Spectral Estimation of Gravitational
Wave Detector Noise | 17 pages, 10 figures | Phys. Rev. D 91, 084034 (2015) | 10.1103/PhysRevD.91.084034 | null | gr-qc astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave data from ground-based detectors is dominated by
instrument noise. Signals will be comparatively weak, and our understanding of
the noise will influence detection confidence and signal characterization.
Mis-modeled noise can produce large systematic biases in both model selection
and parameter esti... | [
{
"created": "Tue, 14 Oct 2014 20:22:22 GMT",
"version": "v1"
}
] | 2015-04-22 | [
[
"Littenberg",
"Tyson B.",
""
],
[
"Cornish",
"Neil J.",
""
]
] | Gravitational wave data from ground-based detectors is dominated by instrument noise. Signals will be comparatively weak, and our understanding of the noise will influence detection confidence and signal characterization. Mis-modeled noise can produce large systematic biases in both model selection and parameter estima... |
gr-qc/0307066 | J. Fernando Barbero G. | J. Fernando Barbero G. and Eduardo J. S. Villase\~nor | Lorentz Violations and Euclidean Signature Metrics | 4 pages. Minor changes. Added references. Accepted for publication in
Physical Review D | Phys.Rev. D68 (2003) 087501 | 10.1103/PhysRevD.68.087501 | null | gr-qc | null | We show that the families of effective actions considered by Jacobson et al.
to study Lorentz invariance violations contain a class of models that represent
pure General Relativity with Euclidean signature. We also point out that some
members of this family of actions preserve Lorentz invariance in a generalized
sens... | [
{
"created": "Tue, 15 Jul 2003 06:38:01 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Aug 2003 11:08:32 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"G.",
"J. Fernando Barbero",
""
],
[
"Villaseñor",
"Eduardo J. S.",
""
]
] | We show that the families of effective actions considered by Jacobson et al. to study Lorentz invariance violations contain a class of models that represent pure General Relativity with Euclidean signature. We also point out that some members of this family of actions preserve Lorentz invariance in a generalized sense. |
1803.08630 | Ronaldo Vieira Lobato | Ronaldo V. Lobato, G. A. Carvalho, A. G. Martins, P. H. R. S. Moraes | Energy nonconservation as a link between $f(R,T)$ gravity and
noncommutative quantum theory | Accepted version | null | 10.1140/epjp/i2019-12638-6 | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by-nc-sa/4.0/ | $f(R,T)$ gravity was proposed as an extension of the $f(R)$ theories,
containing not just geometrical correction terms to the General Relativity
equations, but also material correction terms, dependent on the trace of the
energy-momentum tensor $T$. These material extra terms prevent the
energy-momentum tensor of the... | [
{
"created": "Fri, 23 Mar 2018 01:28:28 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Dec 2018 14:22:35 GMT",
"version": "v2"
}
] | 2019-05-17 | [
[
"Lobato",
"Ronaldo V.",
""
],
[
"Carvalho",
"G. A.",
""
],
[
"Martins",
"A. G.",
""
],
[
"Moraes",
"P. H. R. S.",
""
]
] | $f(R,T)$ gravity was proposed as an extension of the $f(R)$ theories, containing not just geometrical correction terms to the General Relativity equations, but also material correction terms, dependent on the trace of the energy-momentum tensor $T$. These material extra terms prevent the energy-momentum tensor of the t... |
1708.06245 | Muhammad Sharif | M. Sharif and Rubab Manzoor | Stability of Oscillating Gaseous Masses in Massive Brans-Dicke Gravity | 31 pages, 11 figures, to appear in IJMPD | Int. J. Mod. Phys. D 27(2018)1750172 | 10.1142/S0218271817501723 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper explores the instability of gaseous masses for the radial
oscillations in post-Newtonian correction of massive Brans-Dicke gravity. For
this purpose, we derive linearized perturbed equation of motion through
Lagrangian radial perturbation which leads to the condition of marginal
stability. We discuss radiu... | [
{
"created": "Fri, 18 Aug 2017 05:06:58 GMT",
"version": "v1"
}
] | 2018-01-10 | [
[
"Sharif",
"M.",
""
],
[
"Manzoor",
"Rubab",
""
]
] | This paper explores the instability of gaseous masses for the radial oscillations in post-Newtonian correction of massive Brans-Dicke gravity. For this purpose, we derive linearized perturbed equation of motion through Lagrangian radial perturbation which leads to the condition of marginal stability. We discuss radius ... |
gr-qc/0312045 | David Coule | D.H. Coule | Contrasting Quantum Cosmologies | 21 pages, dispute with astro-ph/0311015 addressed | null | null | null | gr-qc | null | We compare the recent loop quantum cosmology approach of Bojowald and
co-workers with earlier quantum cosmological schemes. Because the weak-energy
condition can now be violated at short distances, and not necessarily with a
high energy density, a number of possible instabilities are suggested: flat
space unstable to... | [
{
"created": "Mon, 8 Dec 2003 18:23:47 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Dec 2003 16:25:30 GMT",
"version": "v2"
},
{
"created": "Fri, 6 Feb 2004 15:38:21 GMT",
"version": "v3"
}
] | 2016-08-31 | [
[
"Coule",
"D. H.",
""
]
] | We compare the recent loop quantum cosmology approach of Bojowald and co-workers with earlier quantum cosmological schemes. Because the weak-energy condition can now be violated at short distances, and not necessarily with a high energy density, a number of possible instabilities are suggested: flat space unstable to e... |
1007.1162 | Fabio Duvan Lora Clavijo Mr. | F. D. Lora-Clavijo, A. Cruz-Osorio and F. S. Guzm\'an | Evolution of a mass-less test scalar field on Boson Stars space-times | 9 pages, 15 eps figures, revtex4 | Phys.Rev.D82:023005,2010 | 10.1103/PhysRevD.82.023005 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We numerically solve the mass-less test scalar field equation on the
space-time background of boson stars and black holes. In order to do so, we use
a numerical domain that contains future null infinity. We achieve this
construction using a scri-fixing conformal compactification technique based on
hyperboloidal const... | [
{
"created": "Wed, 7 Jul 2010 15:14:22 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Jul 2010 21:49:51 GMT",
"version": "v2"
}
] | 2010-08-12 | [
[
"Lora-Clavijo",
"F. D.",
""
],
[
"Cruz-Osorio",
"A.",
""
],
[
"Guzmán",
"F. S.",
""
]
] | We numerically solve the mass-less test scalar field equation on the space-time background of boson stars and black holes. In order to do so, we use a numerical domain that contains future null infinity. We achieve this construction using a scri-fixing conformal compactification technique based on hyperboloidal constan... |
1309.7427 | Michael Maziashvili | Alain R. P. Dirkes, Michael Maziashvili and Zurab K. Silagadze | Black hole remnants due to Planck-length deformed QFT | 18 pages, published version | Int. J. Mod. Phys. D25, 1650015 (2016) | 10.1142/S0218271816500152 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was argued in a number of papers that the gravitational potential
calculated by using the modified QFT that follows from the Planck-length
deformed uncertainty relation implies the existence of black-hole remnants of
the order of the Planck-mass. Usually this sort of QFTs are endowed with two
specific features, th... | [
{
"created": "Sat, 28 Sep 2013 05:07:00 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Nov 2015 12:14:54 GMT",
"version": "v2"
}
] | 2015-11-25 | [
[
"Dirkes",
"Alain R. P.",
""
],
[
"Maziashvili",
"Michael",
""
],
[
"Silagadze",
"Zurab K.",
""
]
] | It was argued in a number of papers that the gravitational potential calculated by using the modified QFT that follows from the Planck-length deformed uncertainty relation implies the existence of black-hole remnants of the order of the Planck-mass. Usually this sort of QFTs are endowed with two specific features, the ... |
gr-qc/9210017 | Wai Suen | Ian H. Redmount and Wai-Mo Suen | Is Quantum Spacetime Foam Unstable? | 15 pages | Phys.Rev.D47:2163-2167,1993 | 10.1103/PhysRevD.47.R2163 | WUGRAV-92-10 | gr-qc | null | A very simple wormhole geometry is considered as a model of a mode of
topological fluctutation in Planck-scale spacetime foam. Quantum dynamics of
the hole reduces to quantum mechanics of one variable, throat radius, and
admits a WKB analysis. The hole is quantum-mechanically unstable: It has no
bound states. Wormhol... | [
{
"created": "Wed, 28 Oct 1992 23:12:54 GMT",
"version": "v1"
}
] | 2010-01-06 | [
[
"Redmount",
"Ian H.",
""
],
[
"Suen",
"Wai-Mo",
""
]
] | A very simple wormhole geometry is considered as a model of a mode of topological fluctutation in Planck-scale spacetime foam. Quantum dynamics of the hole reduces to quantum mechanics of one variable, throat radius, and admits a WKB analysis. The hole is quantum-mechanically unstable: It has no bound states. Wormhole ... |
2202.08999 | Naoki Sato | Naoki Sato | Hydrodynamic derivation of the Schr\"odinger equation and spacetime
curvature of a quantum particle | 16 pages | null | null | null | gr-qc math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report a hydrodynamic derivation of the Schr\"odinger equation. The
derivation only assumes that spin represents the angular momentum associated
with the rotation of a charged fluid within a massive particle. The rotation
velocity can be evaluated through the current density of the fourth Maxwell
equation, leading... | [
{
"created": "Fri, 18 Feb 2022 03:08:49 GMT",
"version": "v1"
}
] | 2022-02-21 | [
[
"Sato",
"Naoki",
""
]
] | We report a hydrodynamic derivation of the Schr\"odinger equation. The derivation only assumes that spin represents the angular momentum associated with the rotation of a charged fluid within a massive particle. The rotation velocity can be evaluated through the current density of the fourth Maxwell equation, leading t... |
2111.15448 | Fay\c{c}al Hammad | Fay\c{c}al Hammad, Alexandre Landry, Parvaneh Sadeghi | Spin-1/2 particles under the influence of a uniform magnetic field in
the interior Schwarzschild solution | 18+5 pages, no figures. This paper is published in the Special Issue
of the Journal Universe: Feature Papers - Compact Objects | Universe 7(12), 467 (2021) | 10.3390/universe7120467 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relativistic wave equation for spin-1/2 particles in the interior
Schwarzschild solution in the presence of a uniform magnetic field is obtained.
The fully relativistic regime is considered, and the energy levels occupied by
the particles are derived as functions of the magnetic field, the radius of the
massive s... | [
{
"created": "Tue, 30 Nov 2021 14:46:00 GMT",
"version": "v1"
}
] | 2021-12-01 | [
[
"Hammad",
"Fayçal",
""
],
[
"Landry",
"Alexandre",
""
],
[
"Sadeghi",
"Parvaneh",
""
]
] | The relativistic wave equation for spin-1/2 particles in the interior Schwarzschild solution in the presence of a uniform magnetic field is obtained. The fully relativistic regime is considered, and the energy levels occupied by the particles are derived as functions of the magnetic field, the radius of the massive sph... |
gr-qc/0608123 | Zhao Ren | Zhao Ren, Li Huai-Fan, Zhang Sheng-Li | Canonical Entropy of charged black hole | 9 pages | null | null | null | gr-qc | null | Recently, Hawking radiation of the black hole has been studied by using the
tunnel effect method. It is found that the radiation spectrum of the black hole
is not a strictly pure thermal spectrum. How does the departure from pure
thermal spectrum affect the entropy? This is a very interesting problem. In
this paper, ... | [
{
"created": "Tue, 29 Aug 2006 02:26:10 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ren",
"Zhao",
""
],
[
"Huai-Fan",
"Li",
""
],
[
"Sheng-Li",
"Zhang",
""
]
] | Recently, Hawking radiation of the black hole has been studied by using the tunnel effect method. It is found that the radiation spectrum of the black hole is not a strictly pure thermal spectrum. How does the departure from pure thermal spectrum affect the entropy? This is a very interesting problem. In this paper, we... |
gr-qc/0111005 | Roland Oechslin | Roland Oechslin, Stephan Rosswog, Friederich-Karl Thielemann | Conformally Flat Smoothed Particle Hydrodynamics: Application to Neutron
Star Mergers | 23 pages, 12 figures. Accepted for publication in Phys. Rev. D. v3:
Final Version | Phys.Rev. D65 (2002) 103005 | 10.1103/PhysRevD.65.103005 | null | gr-qc astro-ph | null | We present a new 3D SPH code which solves the general relativistic field +
hydrodynamics equations in the conformally flat approximation. Several test
cases are considered to test different aspects of the code. We finally apply
then the code to the coalescence of a neutron star binary system. The neutron
stars are mo... | [
{
"created": "Fri, 2 Nov 2001 17:48:18 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Nov 2001 18:25:16 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Feb 2002 09:26:59 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Oechslin",
"Roland",
""
],
[
"Rosswog",
"Stephan",
""
],
[
"Thielemann",
"Friederich-Karl",
""
]
] | We present a new 3D SPH code which solves the general relativistic field + hydrodynamics equations in the conformally flat approximation. Several test cases are considered to test different aspects of the code. We finally apply then the code to the coalescence of a neutron star binary system. The neutron stars are mode... |
1810.07443 | Edward Porter | Yann Bouffanais and Edward K. Porter | Bayesian inference for binary neutron star inspirals using a Hamiltonian
Monte Carlo Algorithm | 16 pages, 8 figures. Submitted to PRD | Phys. Rev. D 100, 104023 (2019) | 10.1103/PhysRevD.100.104023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The coalescence of binary neutron stars are one of the main sources of
gravitational waves for ground-based gravitational wave detectors. As Bayesian
inference for binary neutron stars is computationally expensive, more efficient
and faster converging algorithms are always needed. In this work, we conduct a
feasibili... | [
{
"created": "Wed, 17 Oct 2018 09:20:50 GMT",
"version": "v1"
}
] | 2019-11-20 | [
[
"Bouffanais",
"Yann",
""
],
[
"Porter",
"Edward K.",
""
]
] | The coalescence of binary neutron stars are one of the main sources of gravitational waves for ground-based gravitational wave detectors. As Bayesian inference for binary neutron stars is computationally expensive, more efficient and faster converging algorithms are always needed. In this work, we conduct a feasibility... |
gr-qc/9503058 | Rainer Mueller | Juergen Audretsch and Rainer Mueller | Radiative energy shifts of accelerated atoms | 12 pages, Latex, 1 figure as uuencoded eps file, shorter version will
appear in Phys. Rev. A | null | 10.1103/PhysRevA.52.629 | null | gr-qc hep-th quant-ph | null | We consider the influence of acceleration on the radiative energy shifts of
atoms in Minkowski space. We study a two-level atom coupled to a scalar quantum
field. Using a Heisenberg picture approach, we are able to separate the
contributions of vacuum fluctuations and radiation reaction to the Lamb shift
of the two-l... | [
{
"created": "Wed, 29 Mar 1995 15:59:10 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Mar 1995 07:22:28 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Audretsch",
"Juergen",
""
],
[
"Mueller",
"Rainer",
""
]
] | We consider the influence of acceleration on the radiative energy shifts of atoms in Minkowski space. We study a two-level atom coupled to a scalar quantum field. Using a Heisenberg picture approach, we are able to separate the contributions of vacuum fluctuations and radiation reaction to the Lamb shift of the two-lev... |
1401.7639 | Mohamad Atazadeh | K. Atazadeh | Stability of the Einstein static universe in Einstein-Cartan theory | 5 pages, 1 figure, to appear in JCAP | JCAP06(2014)020 | 10.1088/1475-7516/2014/06/020 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/3.0/ | The existence and stability of the Einstein static solution have been built
in the Einstein-Cartan gravity. We show that this solution in the presence of
perfect fluid with spin density satisfying the Weyssenhoff restriction is
cyclically stable around a center equilibrium point. Thus, study of this
solution is inter... | [
{
"created": "Wed, 29 Jan 2014 19:54:19 GMT",
"version": "v1"
},
{
"created": "Tue, 27 May 2014 06:56:45 GMT",
"version": "v2"
}
] | 2014-06-11 | [
[
"Atazadeh",
"K.",
""
]
] | The existence and stability of the Einstein static solution have been built in the Einstein-Cartan gravity. We show that this solution in the presence of perfect fluid with spin density satisfying the Weyssenhoff restriction is cyclically stable around a center equilibrium point. Thus, study of this solution is interes... |
1503.03755 | Ignacio F. Ranea-Sandoval | Ignacio F. Ranea-Sandoval and H\'ector Vucetich | Scalar Resonances in Axially Symmetric Spacetimes | International Journal of Modern Physics D, in press | null | 10.1142/S0218271815500376 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study properties of resonant solutions to the scalar wave equation in
several axially symmetric spacetimes. We prove that non-axial resonant modes do
not exist neither in the Lanczos dust cylinder, the $(2+1)$ extreme BTZ
spacetime nor in a class of simple rotating wormhole solutions. Moreover, we
find unstable so... | [
{
"created": "Thu, 12 Mar 2015 14:54:42 GMT",
"version": "v1"
}
] | 2015-03-13 | [
[
"Ranea-Sandoval",
"Ignacio F.",
""
],
[
"Vucetich",
"Héctor",
""
]
] | We study properties of resonant solutions to the scalar wave equation in several axially symmetric spacetimes. We prove that non-axial resonant modes do not exist neither in the Lanczos dust cylinder, the $(2+1)$ extreme BTZ spacetime nor in a class of simple rotating wormhole solutions. Moreover, we find unstable solu... |
2404.13981 | Leandros Perivolaropoulos | Eleonora Di Valentino, Leandros Perivolaropoulos and Jackson Levi Said | Special Issue on Modified Gravity Approaches to the Tensions of
$\Lambda$CDM: Goals and Highlights | 6 pages no figures Published in Universe in the Special Issue
"Modified Gravity Approaches to the Tensions of $\Lambda$CDM" (
https://www.mdpi.com/journal/universe/special_issues/Gravit ) | null | 10.3390/universe10040184 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Special Issue on "Modified Gravity Approaches to the Tensions of
$\Lambda$CDM"} in the Universe journal tackles significant challenges faced by
the $\Lambda$CDM model, including discrepancies in the Hubble constant, growth
rate of structures, and cosmological anisotropies. These issues suggest
foundational cracks... | [
{
"created": "Mon, 22 Apr 2024 08:43:39 GMT",
"version": "v1"
}
] | 2024-04-23 | [
[
"Di Valentino",
"Eleonora",
""
],
[
"Perivolaropoulos",
"Leandros",
""
],
[
"Said",
"Jackson Levi",
""
]
] | The Special Issue on "Modified Gravity Approaches to the Tensions of $\Lambda$CDM"} in the Universe journal tackles significant challenges faced by the $\Lambda$CDM model, including discrepancies in the Hubble constant, growth rate of structures, and cosmological anisotropies. These issues suggest foundational cracks i... |
2406.11095 | Nicolas Lecoeur | Nicolas Lecoeur | Exact black hole solutions in scalar-tensor theories | PhD thesis. Chaps. 1-3: previously known results, organized to
introduce the subject of closed-form black hole solutions in scalar-tensor
theories. Chaps. 4-6: results obtained during the thesis. Results of Sec. 5.3
(diagonal Kaluza-Klein reduction of arbitrary Lovelock theory) are completely
new (i.e. unpublis... | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General Relativity allows for a unique black hole solution, characterized by
its mass M, angular momentum J, and electric charge Q. Black holes in General
Relativity are thus said to have no hair, that is, no other independent
physical quantity (no-hair theorem). Despite the numerous successes of General
Relativity, ... | [
{
"created": "Sun, 16 Jun 2024 22:52:16 GMT",
"version": "v1"
}
] | 2024-06-18 | [
[
"Lecoeur",
"Nicolas",
""
]
] | General Relativity allows for a unique black hole solution, characterized by its mass M, angular momentum J, and electric charge Q. Black holes in General Relativity are thus said to have no hair, that is, no other independent physical quantity (no-hair theorem). Despite the numerous successes of General Relativity, so... |
1803.09958 | Daniela Pugliese Dr | D. Pugliese and Z. Stuchlik | Proto-jets configurations in RADs orbiting a Kerr SMBH: symmetries and
limiting surfaces | 13 pages, double column, 4 figures multi-panels To appear in Class.
Quantum Grav. https://doi.org/10.1088/1361-6382/aab99d | null | 10.1088/1361-6382/aab99d | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ringed accretion disks (RADs) are agglomerations of perfect-fluid tori
orbiting around a single central attractor that could arise during complex
matter inflows in active galactic nuclei. We focus our analysis to
axi-symmetric accretion tori orbiting in the equatorial plane of a supermassive
Kerr black hole; equilibr... | [
{
"created": "Tue, 27 Mar 2018 08:43:34 GMT",
"version": "v1"
}
] | 2018-05-02 | [
[
"Pugliese",
"D.",
""
],
[
"Stuchlik",
"Z.",
""
]
] | Ringed accretion disks (RADs) are agglomerations of perfect-fluid tori orbiting around a single central attractor that could arise during complex matter inflows in active galactic nuclei. We focus our analysis to axi-symmetric accretion tori orbiting in the equatorial plane of a supermassive Kerr black hole; equilibriu... |
1505.05113 | Pedro Moraes | D. Momeni, P.H.R.S. Moraes, H. Gholizade and R. Myrzakulov | Mimetic Compact Stars | 14 pages, 8 figures, Accepted for publication in International
Journal of Geometrical Methods in Modern Physics | null | 10.1142/S0219887818500913 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified gravity models have been constantly proposed with the purpose of
evading some standard gravity shortcomings. Recently proposed by A.H.
Chamseddine and V. Mukhanov, the Mimetic Gravity arises as an optimistic
alternative. Our purpose in this work is to derive Tolman-Oppenheimer-Volkoff
equations and solutions... | [
{
"created": "Tue, 19 May 2015 18:35:38 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Jan 2018 16:59:38 GMT",
"version": "v2"
}
] | 2018-02-07 | [
[
"Momeni",
"D.",
""
],
[
"Moraes",
"P. H. R. S.",
""
],
[
"Gholizade",
"H.",
""
],
[
"Myrzakulov",
"R.",
""
]
] | Modified gravity models have been constantly proposed with the purpose of evading some standard gravity shortcomings. Recently proposed by A.H. Chamseddine and V. Mukhanov, the Mimetic Gravity arises as an optimistic alternative. Our purpose in this work is to derive Tolman-Oppenheimer-Volkoff equations and solutions f... |
1708.03592 | Alexander Myagky | Andrey N. Makarenko and Alexander N. Myagky | The Asymptotic Behavior of Bouncing Cosmological Models in
$F(\mathcal{G})$ Gravity Theory | 11 pages. arXiv admin note: substantial text overlap with
arXiv:1403.3242 | Int.J.Geom.Meth.Mod.Phys. 14 (2017) 1750148 | 10.1142/S0219887817501481 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reconstruct $F(\mathcal{G})$ gravity theory with an exponential scale
factor to realize the bouncing behavior in the early universe and examine the
asymptotic behaviour of late-time solutions in this model. We propose an
approach to the construction of asymptotic expansions of solutions of the
Friedmann equations ... | [
{
"created": "Thu, 10 Aug 2017 15:20:24 GMT",
"version": "v1"
}
] | 2017-11-15 | [
[
"Makarenko",
"Andrey N.",
""
],
[
"Myagky",
"Alexander N.",
""
]
] | We reconstruct $F(\mathcal{G})$ gravity theory with an exponential scale factor to realize the bouncing behavior in the early universe and examine the asymptotic behaviour of late-time solutions in this model. We propose an approach to the construction of asymptotic expansions of solutions of the Friedmann equations on... |
1209.3371 | Gonzalo Olmo | J. Martinez-Asencio, Gonzalo J. Olmo, D. Rubiera-Garcia | Black hole formation from a null fluid in extended Palatini gravity | 8 pages, double column (revtex4-1), 4 figures | null | 10.1103/PhysRevD.86.104010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the formation and perturbation of black holes by null fluxes of
neutral matter in a quadratic extension of General Relativity formulated a la
Palatini. Working in a spherically symmetric space-time, we obtain an exact
analytical solution for the metric that extends the usual Vaidya-type solution
to this type... | [
{
"created": "Sat, 15 Sep 2012 08:23:14 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Martinez-Asencio",
"J.",
""
],
[
"Olmo",
"Gonzalo J.",
""
],
[
"Rubiera-Garcia",
"D.",
""
]
] | We study the formation and perturbation of black holes by null fluxes of neutral matter in a quadratic extension of General Relativity formulated a la Palatini. Working in a spherically symmetric space-time, we obtain an exact analytical solution for the metric that extends the usual Vaidya-type solution to this type o... |
2304.05870 | Luis Herrera | L. Herrera | Complexity and simplicity of self-gravitating fluids | 30 pages Latex (Revtex-4). Invited chapter for the edited book New
Frontiers in Gravitational Collapse and Spacetime Singularities (Eds. P.
Joshi and D. Malafarina, Springer Singapore), expected in 2023 | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We review a recently proposed definition of complexity of the structure of
self--gravitating fluids \cite{ch1}, and the criterium to define the simplest
mode of their evolution. We analyze the origin of these concepts and their
possible applications in the study of gravitation collapse. We start by
considering the st... | [
{
"created": "Wed, 12 Apr 2023 13:59:39 GMT",
"version": "v1"
}
] | 2023-04-13 | [
[
"Herrera",
"L.",
""
]
] | We review a recently proposed definition of complexity of the structure of self--gravitating fluids \cite{ch1}, and the criterium to define the simplest mode of their evolution. We analyze the origin of these concepts and their possible applications in the study of gravitation collapse. We start by considering the stat... |
gr-qc/0611007 | Edward Anderson | Edward Anderson | Emergent Semiclassical Time in Quantum Gravity. I. Mechanical Models | References Updated | Class.Quant.Grav.24:2935-2978,2007 | 10.1088/0264-9381/24/11/011 | null | gr-qc | null | Strategies intended to resolve the problem of time in quantum gravity by
means of emergent or hidden timefunctions are considered in the arena of
relational particle toy models. In situations with `heavy' and `light' degrees
of freedom, two notions of emergent semiclassical WKB time emerge; these are
furthermore equi... | [
{
"created": "Wed, 1 Nov 2006 23:57:01 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Nov 2007 03:45:26 GMT",
"version": "v2"
}
] | 2010-10-27 | [
[
"Anderson",
"Edward",
""
]
] | Strategies intended to resolve the problem of time in quantum gravity by means of emergent or hidden timefunctions are considered in the arena of relational particle toy models. In situations with `heavy' and `light' degrees of freedom, two notions of emergent semiclassical WKB time emerge; these are furthermore equiva... |
1903.10907 | Amir Hadi Ziaie | Mohammad Reza Mehdizadeh and Amir Hadi Ziaie | Traversable wormholes in Einsteinian cubic gravity | 20 pages and 7 figures | Mod. Phys. Lett. A, 35, No. 6, 2050017 (2020) | 10.1142/S0217732320500170 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work we investigate wormhole configurations described by a
constant redshift function in Einstein-Cubic gravity ({{\sf ECG}}). We derive
analytical wormhole geometries by assuming a particular equation of state
({{\sf EoS}}) and investigate the possibility that these solutions satisfy the
standard ener... | [
{
"created": "Sun, 24 Mar 2019 10:15:59 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Oct 2019 04:43:07 GMT",
"version": "v2"
}
] | 2020-03-05 | [
[
"Mehdizadeh",
"Mohammad Reza",
""
],
[
"Ziaie",
"Amir Hadi",
""
]
] | In the present work we investigate wormhole configurations described by a constant redshift function in Einstein-Cubic gravity ({{\sf ECG}}). We derive analytical wormhole geometries by assuming a particular equation of state ({{\sf EoS}}) and investigate the possibility that these solutions satisfy the standard energy... |
gr-qc/9805094 | J. A. Valiente Kroon | J.A. Valiente Kroon | Conserved Quantities for Polyhomogeneous Space-Times | 21 pages, LaTex, to be published in CQG | Class.Quant.Grav. 15 (1998) 2479-2491 | 10.1088/0264-9381/15/8/023 | null | gr-qc | null | The existence of conserved quantities with a structure similar to the
Newman-Penrose quantities in a polyhomogeneous space-time is addressed. The
most general form for the initial data formally consistent with the
polyhomogeneous setting is found. The subsequent study is done for those
polyhomogeneous space-times whe... | [
{
"created": "Wed, 27 May 1998 10:24:48 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Kroon",
"J. A. Valiente",
""
]
] | The existence of conserved quantities with a structure similar to the Newman-Penrose quantities in a polyhomogeneous space-time is addressed. The most general form for the initial data formally consistent with the polyhomogeneous setting is found. The subsequent study is done for those polyhomogeneous space-times where... |
gr-qc/0408058 | Peng Wang | Peng Wang, Gilberto M. Kremer, Daniele S. M. Alves, Xin-He Meng | A Note on Energy-Momentum Conservation in Palatini Formulation of L(R)
Gravity | 7 pages | Gen.Rel.Grav. 38 (2006) 517-521 | 10.1007/s10714-006-0238-9 | null | gr-qc | null | By establishing that Palatini formulation of $L(R)$ gravity is equivalent to
$\omega=-3/2$ Brans-Dicke theory, we show that energy-momentum tensor is
covariantly conserved in this type of modified gravity theory.
| [
{
"created": "Wed, 18 Aug 2004 10:41:03 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Wang",
"Peng",
""
],
[
"Kremer",
"Gilberto M.",
""
],
[
"Alves",
"Daniele S. M.",
""
],
[
"Meng",
"Xin-He",
""
]
] | By establishing that Palatini formulation of $L(R)$ gravity is equivalent to $\omega=-3/2$ Brans-Dicke theory, we show that energy-momentum tensor is covariantly conserved in this type of modified gravity theory. |
1903.00391 | A. Emrah Y\"ukselci | A. Sava\c{s} Arapo\u{g}lu and K. Yavuz Ek\c{s}i and A. Emrah
Y\"ukselci | Neutron Star Structure in the Presence of Nonminimally Coupled Scalar
Fields | 17 pages, 4 figures; PRD printed | Phys. Rev. D 99, 064055 (2019) | 10.1103/PhysRevD.99.064055 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the structure of neutron stars in scalar-tensor theories for the
nonminimal coupling of the form $(1+\kappa \xi \phi^{2})\cal R$. We solve the
hydrostatic equilibrium equations for two different types of scalar field
potentials and three different equations of state representative of different
degrees of sti... | [
{
"created": "Fri, 1 Mar 2019 16:25:46 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Apr 2019 15:12:43 GMT",
"version": "v2"
}
] | 2019-04-02 | [
[
"Arapoğlu",
"A. Savaş",
""
],
[
"Ekşi",
"K. Yavuz",
""
],
[
"Yükselci",
"A. Emrah",
""
]
] | We study the structure of neutron stars in scalar-tensor theories for the nonminimal coupling of the form $(1+\kappa \xi \phi^{2})\cal R$. We solve the hydrostatic equilibrium equations for two different types of scalar field potentials and three different equations of state representative of different degrees of stiff... |
2108.02331 | Yitian Chen | Yitian Chen, Nils Deppe, Lawrence E. Kidder, Saul A. Teukolsky | Efficient simulations of high-spin black holes with a new gauge | 17 pages, 11 figures, 3 tables | Phys. Rev. D 104, 084046 (2021) | 10.1103/PhysRevD.104.084046 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new choice of initial data for binary black hole simulations
that significantly improves the efficiency of high-spin simulations. We use
spherical Kerr-Schild coordinates, where the horizon of a rotating black hole
is spherical, for each black hole. The superposed spherical Kerr-Schild initial
data reduc... | [
{
"created": "Thu, 5 Aug 2021 01:23:17 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Oct 2021 15:30:18 GMT",
"version": "v2"
}
] | 2021-10-15 | [
[
"Chen",
"Yitian",
""
],
[
"Deppe",
"Nils",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Teukolsky",
"Saul A.",
""
]
] | We present a new choice of initial data for binary black hole simulations that significantly improves the efficiency of high-spin simulations. We use spherical Kerr-Schild coordinates, where the horizon of a rotating black hole is spherical, for each black hole. The superposed spherical Kerr-Schild initial data reduce ... |
1406.3040 | Ioannis Gkigkitzis Dr. | Ioannis Haranas, Ioannis Gkigkitzis | Bekenstein Bound of Information Number N and its Relation to
Cosmological Parameters in a Universe with and without Cosmological Constant | Bekenstein bound, cosmological constant, information, nats, entropy,
mass of the universe, self-gravitating systems, Calogero's conjecture | Modern Physics Letters A, 28, 1350077 (2013) | 10.1142/S0217732313500776 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bekenstein has obtained is an upper limit on the entropy S, and from that, an
information number bound N is deduced. In other words, this is the information
contained within a given finite region of space that includes a finite amount
of energy. Similarly, this can be thought as the maximum amount of information
requ... | [
{
"created": "Mon, 9 Jun 2014 15:34:12 GMT",
"version": "v1"
}
] | 2014-06-13 | [
[
"Haranas",
"Ioannis",
""
],
[
"Gkigkitzis",
"Ioannis",
""
]
] | Bekenstein has obtained is an upper limit on the entropy S, and from that, an information number bound N is deduced. In other words, this is the information contained within a given finite region of space that includes a finite amount of energy. Similarly, this can be thought as the maximum amount of information requir... |
1504.03544 | Asrin Abdolmaleki | A. Abdolmaleki, T. Najafi | Generalized second law of thermodynamics on the apparent horizon in
modified Gauss-Bonnet gravity | 21 pages, 18 figures | IJMPD 25, 3 (2016) | 10.1142/S0218271816500401 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified gravity and generalized second law (GSL) of thermodynamics are
interesting topics in the modern cosmology. In this regard, we investigate the
GSL of gravitational thermodynamics in the framework of modified Gauss-Bonnet
gravity or f(G)-gravity. We consider a spatially FRW universe filled with the
matter and ... | [
{
"created": "Sat, 11 Apr 2015 09:10:47 GMT",
"version": "v1"
}
] | 2016-11-22 | [
[
"Abdolmaleki",
"A.",
""
],
[
"Najafi",
"T.",
""
]
] | Modified gravity and generalized second law (GSL) of thermodynamics are interesting topics in the modern cosmology. In this regard, we investigate the GSL of gravitational thermodynamics in the framework of modified Gauss-Bonnet gravity or f(G)-gravity. We consider a spatially FRW universe filled with the matter and ra... |
0711.4767 | Ulf Leonhardt | Germain Rousseaux, Christian Mathis, Philippe Maissa, Thomas G.
Philbin, and Ulf Leonhardt | Observation of negative-frequency waves in a water tank: A classical
analogue to the Hawking effect? | null | NewJ.Phys.10:053015,2008 | 10.1088/1367-2630/10/5/053015 | null | gr-qc | null | The conversion of positive-frequency waves into negative-frequency waves at
the event horizon is the mechanism at the heart of the Hawking radiation of
black holes. In black-hole analogues, horizons are formed for waves propagating
in a medium against the current when and where the flow exceeds the wave
velocity. We ... | [
{
"created": "Thu, 29 Nov 2007 16:33:08 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jan 2008 15:36:58 GMT",
"version": "v2"
},
{
"created": "Sat, 1 Mar 2008 11:52:39 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Rousseaux",
"Germain",
""
],
[
"Mathis",
"Christian",
""
],
[
"Maissa",
"Philippe",
""
],
[
"Philbin",
"Thomas G.",
""
],
[
"Leonhardt",
"Ulf",
""
]
] | The conversion of positive-frequency waves into negative-frequency waves at the event horizon is the mechanism at the heart of the Hawking radiation of black holes. In black-hole analogues, horizons are formed for waves propagating in a medium against the current when and where the flow exceeds the wave velocity. We re... |
1506.06400 | Spyros Alexakis | Spyros Alexakis | The Penrose inequality on perturbations of the Schwarzschild exterior | 50 pages, 2 figures | null | null | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove a version the Penrose inequality for black hole space-times which
are perturbations of the Schwarzschild exterior in a slab around a null
hypersurface $\underline{\mathcal{N}}_0$. $\underline{\mathcal{N}}_0$
terminates at past null infinity $\mathcal{I}^-$ and
$\mathcal{S}_0:=\partial\underline{\mathcal{N}}_... | [
{
"created": "Sun, 21 Jun 2015 18:52:47 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Alexakis",
"Spyros",
""
]
] | We prove a version the Penrose inequality for black hole space-times which are perturbations of the Schwarzschild exterior in a slab around a null hypersurface $\underline{\mathcal{N}}_0$. $\underline{\mathcal{N}}_0$ terminates at past null infinity $\mathcal{I}^-$ and $\mathcal{S}_0:=\partial\underline{\mathcal{N}}_0$... |
gr-qc/0604018 | Moh'd Qusailah Mr | K.G. Arun, B.R. Iyer, M.S.S. Qusailah, B.S. Sathyaprakash | Testing post-Newtonian theory with gravitational wave observations | 9 pages, 2 figures | Class.Quant.Grav.23:L37-L43,2006 | 10.1088/0264-9381/23/9/L01 | null | gr-qc astro-ph | null | The Laser Interferometric Space Antenna (LISA) will observe supermassive
black hole binary mergers with amplitude signal-to-noise ratio of several
thousands. We investigate the extent to which such observations afford
high-precision tests of Einstein's gravity. We show that LISA provides a unique
opportunity to probe... | [
{
"created": "Wed, 5 Apr 2006 12:23:02 GMT",
"version": "v1"
}
] | 2010-11-05 | [
[
"Arun",
"K. G.",
""
],
[
"Iyer",
"B. R.",
""
],
[
"Qusailah",
"M. S. S.",
""
],
[
"Sathyaprakash",
"B. S.",
""
]
] | The Laser Interferometric Space Antenna (LISA) will observe supermassive black hole binary mergers with amplitude signal-to-noise ratio of several thousands. We investigate the extent to which such observations afford high-precision tests of Einstein's gravity. We show that LISA provides a unique opportunity to probe t... |
1407.5662 | Davood Momeni Dr | Davood Momeni, Aziza Altaibayeva, Ratbay Myrzakulov | New Modified Mimetic Gravity | Revised version, Accepted in "International Journal of Geometric
Methods in Modern Physics" | Int. J. Geom. Methods Mod. Phys. 11, 1450091 (2014) | 10.1142/S0219887814500911 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A modified Mimetic gravity (MMG) is proposed as a generalization of general
relativity. The model contain a physical metric which is function of an
auxiliary (unphysical) metric and a Lyra's metric. We construct different kinds
of conformally invariant models in different levels of the expansion parameter
$\lambda$. ... | [
{
"created": "Mon, 21 Jul 2014 20:41:03 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Aug 2014 13:00:39 GMT",
"version": "v2"
}
] | 2015-04-07 | [
[
"Momeni",
"Davood",
""
],
[
"Altaibayeva",
"Aziza",
""
],
[
"Myrzakulov",
"Ratbay",
""
]
] | A modified Mimetic gravity (MMG) is proposed as a generalization of general relativity. The model contain a physical metric which is function of an auxiliary (unphysical) metric and a Lyra's metric. We construct different kinds of conformally invariant models in different levels of the expansion parameter $\lambda$. Th... |
1012.2861 | Dmitri Gal'tsov | Dmitry V. Gal'tsov and Evgeny A. Davydov | Cosmological models with gauge fields | Talk at the Int. Conf. "Gauge Fields. Yesterday, Today, Tomorrow"
dedicated the 70-th anniversary of A. A. Slavnov, MIAN, Moscow, January
19-24, 2010, to be published in the Proceedings | Proceedings of the Steklov Institute of Mathematics, 2011, Vol.
272, pp. 119-140 | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss cosmological models involving homogeneous and isotropic Yang-Mills
(YM) fields. Such models were proposed recently as an alternative to scalar
models of cosmic acceleration. There exists a unique SU(2) YM configuration
(generalizable to larger gauge groups) whose energy-momentum tensor is
homogeneous and i... | [
{
"created": "Mon, 13 Dec 2010 20:59:47 GMT",
"version": "v1"
}
] | 2011-03-22 | [
[
"Gal'tsov",
"Dmitry V.",
""
],
[
"Davydov",
"Evgeny A.",
""
]
] | We discuss cosmological models involving homogeneous and isotropic Yang-Mills (YM) fields. Such models were proposed recently as an alternative to scalar models of cosmic acceleration. There exists a unique SU(2) YM configuration (generalizable to larger gauge groups) whose energy-momentum tensor is homogeneous and iso... |
2208.02761 | Piyabut Burikham | Supakchai Ponglertsakul, Piyabut Burikham, Sitthichai Pinkanjanarod | Normal and Quasinormal Modes of Holographic Multiquark Star | 9 pages, 8 figures | null | 10.1103/PhysRevD.107.023020 | null | gr-qc astro-ph.SR hep-ph | http://creativecommons.org/licenses/by/4.0/ | The quadrupole normal-mode oscillation frequency $f_{n}$ of multiquark star
are computed for $n=1-5$. At the transition from low to high density multiquark
in the core region, the first 2 modes jump to larger values, a distinctive
signature of the presence of the high-density core. When the star oscillation
couples w... | [
{
"created": "Thu, 4 Aug 2022 16:39:12 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Jan 2023 15:28:47 GMT",
"version": "v2"
}
] | 2023-02-08 | [
[
"Ponglertsakul",
"Supakchai",
""
],
[
"Burikham",
"Piyabut",
""
],
[
"Pinkanjanarod",
"Sitthichai",
""
]
] | The quadrupole normal-mode oscillation frequency $f_{n}$ of multiquark star are computed for $n=1-5$. At the transition from low to high density multiquark in the core region, the first 2 modes jump to larger values, a distinctive signature of the presence of the high-density core. When the star oscillation couples wit... |
gr-qc/0202068 | Shatskiy Alexandr | A. A. Shatskiy | Axial Magnetostatics of a Ring Current in a Kerr Field | 10 pages, 1 figures | Journal of Experimental and Theoretical Physics, Vol. 93, No. 5,
2001, Received March 28, 2001 | null | null | gr-qc | null | The electromagnetic fields generated by a ring current around a Kerr black
hole have been found. The acceleration of a charged particle by a force
electric field along the rotation axis is investigated in the constructed
model, as applied to the astrophysics of quasars.
| [
{
"created": "Tue, 19 Feb 2002 10:38:25 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Feb 2002 14:54:33 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Shatskiy",
"A. A.",
""
]
] | The electromagnetic fields generated by a ring current around a Kerr black hole have been found. The acceleration of a charged particle by a force electric field along the rotation axis is investigated in the constructed model, as applied to the astrophysics of quasars. |
1702.05889 | Junji Jia | Junji Jia, Jiawei Liu, Xionghui Liu, Zhongyou Mo, Xiankai Pang,
Yaoguang Wang, Nan Yang | Existence and stability of circular orbits in general static and
spherically symmetric spacetimes | 17 pages, no figure; references adjusted; error corrected | null | 10.1007/s10714-017-2337-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence and stability of circular orbits (CO) in static and spherically
symmetric (SSS) spacetime are important because of their practical and
potential usefulness. In this paper, using the fixed point method, we first
prove a necessary and sufficient condition on the metric function for the
existence of timeli... | [
{
"created": "Mon, 20 Feb 2017 08:12:19 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Mar 2017 05:33:54 GMT",
"version": "v2"
},
{
"created": "Sat, 15 Apr 2017 11:30:26 GMT",
"version": "v3"
}
] | 2018-02-14 | [
[
"Jia",
"Junji",
""
],
[
"Liu",
"Jiawei",
""
],
[
"Liu",
"Xionghui",
""
],
[
"Mo",
"Zhongyou",
""
],
[
"Pang",
"Xiankai",
""
],
[
"Wang",
"Yaoguang",
""
],
[
"Yang",
"Nan",
""
]
] | The existence and stability of circular orbits (CO) in static and spherically symmetric (SSS) spacetime are important because of their practical and potential usefulness. In this paper, using the fixed point method, we first prove a necessary and sufficient condition on the metric function for the existence of timelike... |
0709.4538 | Ujjal Debnath | Ujjal Debnath, Narayan Chandra Chakraborty and Subenoy Chakraborty | Gravitational Collapse in Higher Dimensional Husain Space-Time | 12 latex pages, No figure, RevTex style | Gen.Rel.Grav.40:749-763,2008 | 10.1007/s10714-007-0525-0 | null | gr-qc | null | We investigate exact solution in higher dimensional Husain model for a null
fluid source with pressure $p$ and density $\rho$ are related by the following
relations (i) $p=k\rho$, (ii) $p=k\rho-\frac{B(v)}{\rho^{\alpha}}$ (variable
modified Chaplygin) and (iii) $p=k\rho^{\alpha}$ (polytropic). We have studied
the nat... | [
{
"created": "Fri, 28 Sep 2007 06:03:31 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Debnath",
"Ujjal",
""
],
[
"Chakraborty",
"Narayan Chandra",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | We investigate exact solution in higher dimensional Husain model for a null fluid source with pressure $p$ and density $\rho$ are related by the following relations (i) $p=k\rho$, (ii) $p=k\rho-\frac{B(v)}{\rho^{\alpha}}$ (variable modified Chaplygin) and (iii) $p=k\rho^{\alpha}$ (polytropic). We have studied the natur... |
gr-qc/9703009 | Henning Wissowski | H. Wissowski and H.A. Kastrup | Back Reaction and Semiclassical Approximation of cosmological models
coupled to matter | 4 pages, Latex, to appear in: Proceedings of the Second Meeting on
constrained Dynamics and Quantum Gravity (Santa Margherita Ligure 1996) | Nucl.Phys.Proc.Suppl.57:299-302,1997 | 10.1016/S0920-5632(97)00394-0 | PITHA 97/14 | gr-qc | null | Bianchi -I, -III, and FRW type models minimally coupled to a massive
spatially homogeneous scalar field (i.e. a particle) are studied in the
framework of semiclassical quantum gravity. In a first step we discuss the
solutions of the corresponding equation for a Schr\"odinger particle
propagating on a classical backgr... | [
{
"created": "Tue, 4 Mar 1997 15:03:56 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Wissowski",
"H.",
""
],
[
"Kastrup",
"H. A.",
""
]
] | Bianchi -I, -III, and FRW type models minimally coupled to a massive spatially homogeneous scalar field (i.e. a particle) are studied in the framework of semiclassical quantum gravity. In a first step we discuss the solutions of the corresponding equation for a Schr\"odinger particle propagating on a classical backgrou... |
1606.01011 | Michael Coughlin | Michael W. Coughlin, Nelson L. Christensen, Rosario De Rosa, Irene
Fiori, Mark Go{\l}kowski, Melissa Guidry, Jan Harms, Jerzy Kubisz, Andrzej
Kulak, Janusz Mlynarczyk, Federico Paoletti, Eric Thrane | Subtraction of correlated noise in global networks of gravitational-wave
interferometers | null | null | 10.1088/0264-9381/33/22/224003 | null | gr-qc astro-ph.IM physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent discovery of merging black holes suggests that a stochastic
gravitational-wave background is within reach of the advanced detector network
operating at design sensitivity. However, correlated magnetic noise from
Schumann resonances threatens to contaminate observation of a stochastic
background. In this pa... | [
{
"created": "Fri, 3 Jun 2016 09:07:45 GMT",
"version": "v1"
}
] | 2016-11-23 | [
[
"Coughlin",
"Michael W.",
""
],
[
"Christensen",
"Nelson L.",
""
],
[
"De Rosa",
"Rosario",
""
],
[
"Fiori",
"Irene",
""
],
[
"Gołkowski",
"Mark",
""
],
[
"Guidry",
"Melissa",
""
],
[
"Harms",
"Jan",
""
]... | The recent discovery of merging black holes suggests that a stochastic gravitational-wave background is within reach of the advanced detector network operating at design sensitivity. However, correlated magnetic noise from Schumann resonances threatens to contaminate observation of a stochastic background. In this pape... |
gr-qc/0401054 | Giovanni Montani | G. Aprea, G. Montani, R. Ruffini | Test particles behavior in the framework of a lagrangian geometric
theory with propagating torsion | 12 pages, no figures, to appear on Int. Journ. Mod. Phys.D | Int.J.Mod.Phys. D12 (2003) 1875-1888 | 10.1142/S0218271803003888 | null | gr-qc astro-ph | null | Working in the lagrangian framework, we develop a geometric theory in vacuum
with propagating torsion; the antisymmetric and trace parts of the torsion
tensor, considered as derived from local potential fields, are taken and, using
the minimal action principle, their field equations are calculated. Actually
these wil... | [
{
"created": "Tue, 13 Jan 2004 11:42:51 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Aprea",
"G.",
""
],
[
"Montani",
"G.",
""
],
[
"Ruffini",
"R.",
""
]
] | Working in the lagrangian framework, we develop a geometric theory in vacuum with propagating torsion; the antisymmetric and trace parts of the torsion tensor, considered as derived from local potential fields, are taken and, using the minimal action principle, their field equations are calculated. Actually these will ... |
gr-qc/0307077 | Giovanni Montani | Giovanni Montani, Remo Ruffini and Roustam Zalaletdinov | The Gravitational Polarization in General Relativity: Solution to
Szekeres' Model of Quadrupole Polarization | 22 pages, no figures, to appear on Class. Quantum Grav | Class.Quant.Grav. 20 (2003) 4195-4212 | 10.1088/0264-9381/20/19/305 | null | gr-qc | null | A model for the static weak-field macroscopic medium is analyzed and the
equation for the macroscopic gravitational potential is derived. This is a
biharmonic equation which is a non-trivial generalization of the Poisson
equation of Newtonian gravity. In case of the strong gravitational quadrupole
polarization it ess... | [
{
"created": "Wed, 16 Jul 2003 10:02:15 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Montani",
"Giovanni",
""
],
[
"Ruffini",
"Remo",
""
],
[
"Zalaletdinov",
"Roustam",
""
]
] | A model for the static weak-field macroscopic medium is analyzed and the equation for the macroscopic gravitational potential is derived. This is a biharmonic equation which is a non-trivial generalization of the Poisson equation of Newtonian gravity. In case of the strong gravitational quadrupole polarization it essen... |
gr-qc/0301099 | Robert Mann | F.J. Burnell, J.J. Malecki, R.B. Mann and T. Ohta | Chaos in an Exact Relativistic 3-body Self-Gravitating System | latex, 65 pages, 36 figures, high-resolution figures available upon
request | Phys.Rev. E69 (2004) 016214 | 10.1103/PhysRevE.69.016214 | WATPHYS-TH03/01 | gr-qc | null | We consider the problem of three body motion for a relativistic
one-dimensional self-gravitating system. After describing the canonical
decomposition of the action, we find an exact expression for the 3-body
Hamiltonian, implicitly determined in terms of the four coordinate and momentum
degrees of freedom in the syst... | [
{
"created": "Thu, 23 Jan 2003 23:45:04 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Burnell",
"F. J.",
""
],
[
"Malecki",
"J. J.",
""
],
[
"Mann",
"R. B.",
""
],
[
"Ohta",
"T.",
""
]
] | We consider the problem of three body motion for a relativistic one-dimensional self-gravitating system. After describing the canonical decomposition of the action, we find an exact expression for the 3-body Hamiltonian, implicitly determined in terms of the four coordinate and momentum degrees of freedom in the system... |
gr-qc/0512051 | Bijan Saha | Bijan Saha, Victor Rikhvitsky and Mihai Visinescu | Bel-Robinson tensor and dominant energy property in the Bianchi type I
Universe | 15 pages, revised version, no figures | Mod.Phys.Lett. A21 (2006) 847-862 | 10.1142/S0217732306020196 | null | gr-qc | null | Within the framework of Bianchi type-I space-time we study the Bel-Robinson
tensor and its impact on the evolution of the Universe. We use different
definitions of the Bel-Robinson tensor existing in the literature and compare
the results. Finally we investigate the so called "dominant super-energy
property" for the ... | [
{
"created": "Thu, 8 Dec 2005 13:23:54 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Dec 2005 12:22:01 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Feb 2006 11:29:02 GMT",
"version": "v3"
}
] | 2015-05-01 | [
[
"Saha",
"Bijan",
""
],
[
"Rikhvitsky",
"Victor",
""
],
[
"Visinescu",
"Mihai",
""
]
] | Within the framework of Bianchi type-I space-time we study the Bel-Robinson tensor and its impact on the evolution of the Universe. We use different definitions of the Bel-Robinson tensor existing in the literature and compare the results. Finally we investigate the so called "dominant super-energy property" for the Be... |
1409.6406 | Ivan Agullo | Ivan Agullo, Aitor Landete, Jose Navarro-Salas | Electric-magnetic duality and renormalization in curved spacetimes | 7 pages, 0 figures, Published version | Phys.Rev. D90 (2014) 12, 124067 | 10.1103/PhysRevD.90.124067 | LSU-REL-092314 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We point out that the duality symmetry of free electromagnetism does not hold
in the quantum theory if an arbitrary classical gravitational background is
present. The symmetry breaks in the process of renormalization, as also happens
with conformal invariance. We show that a similar duality-anomaly appears for a
mass... | [
{
"created": "Tue, 23 Sep 2014 04:14:59 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Dec 2014 03:18:33 GMT",
"version": "v2"
}
] | 2015-06-22 | [
[
"Agullo",
"Ivan",
""
],
[
"Landete",
"Aitor",
""
],
[
"Navarro-Salas",
"Jose",
""
]
] | We point out that the duality symmetry of free electromagnetism does not hold in the quantum theory if an arbitrary classical gravitational background is present. The symmetry breaks in the process of renormalization, as also happens with conformal invariance. We show that a similar duality-anomaly appears for a massle... |
2202.02303 | Pedro Mario Ca\~nate Casseres | Pedro Ca\~nate | Black bounces as magnetically charged phantom regular black holes in
Einstein-nonlinear electrodynamics gravity coupled to a self-interacting
scalar field | 21 pages, 0 figures | null | 10.1103/PhysRevD.106.024031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The "black-bounce" spacetime geometries, were recently proposed in [A.
Simpson, M. Visser, JCAP 02 (2019) 042] as regular black holes that bouncing
into a future incarnation of the universe. In this work we will present several
black-bounce exact solutions of General Relativity. Among them is a novel type
of black-bo... | [
{
"created": "Fri, 4 Feb 2022 18:40:41 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Feb 2022 19:54:41 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Jul 2022 01:32:21 GMT",
"version": "v3"
}
] | 2022-07-29 | [
[
"Cañate",
"Pedro",
""
]
] | The "black-bounce" spacetime geometries, were recently proposed in [A. Simpson, M. Visser, JCAP 02 (2019) 042] as regular black holes that bouncing into a future incarnation of the universe. In this work we will present several black-bounce exact solutions of General Relativity. Among them is a novel type of black-boun... |
1204.5948 | Craig J. Hogan | Craig J. Hogan | A Model of Macroscopic Geometrical Uncertainty | 14 pages, 3 figures | null | null | FERMILAB-PUB-12-044-A | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A model quantum system is proposed to describe position states of a massive
body in flat space on large scales, excluding all standard quantum and
gravitational degrees of freedom. The model is based on standard quantum spin
commutators, with operators interpreted as positions instead of spin, and a
Planck-scale leng... | [
{
"created": "Wed, 25 Apr 2012 16:45:26 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Mar 2013 17:07:34 GMT",
"version": "v10"
},
{
"created": "Sun, 24 Mar 2013 20:06:22 GMT",
"version": "v11"
},
{
"created": "Tue, 9 Apr 2013 20:20:42 GMT",
"version": "v12"
},
{
... | 2014-12-05 | [
[
"Hogan",
"Craig J.",
""
]
] | A model quantum system is proposed to describe position states of a massive body in flat space on large scales, excluding all standard quantum and gravitational degrees of freedom. The model is based on standard quantum spin commutators, with operators interpreted as positions instead of spin, and a Planck-scale length... |
1201.2054 | Jose Luis Jaramillo | Jos\'e Luis Jaramillo | Area inequalities for stable marginally trapped surfaces | 22 pages, no figures; Contribution to the proceedings volume of the
VI International Meeting on Lorentzian Geometry, GELOGRA'11, Granada, Spain,
6-9 September 2011 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a family of inequalities involving the area, angular momentum and
charges of stably outermost marginally trapped surfaces in generic non-vacuum
dynamical spacetimes, with non-negative cosmological constant and matter
sources satisfying the dominant energy condition. These inequalities provide
lower bounds ... | [
{
"created": "Tue, 10 Jan 2012 13:51:18 GMT",
"version": "v1"
}
] | 2012-01-11 | [
[
"Jaramillo",
"José Luis",
""
]
] | We discuss a family of inequalities involving the area, angular momentum and charges of stably outermost marginally trapped surfaces in generic non-vacuum dynamical spacetimes, with non-negative cosmological constant and matter sources satisfying the dominant energy condition. These inequalities provide lower bounds fo... |
2307.01919 | Bobur Turimov | Bobur Turimov and Shuhrat Hayitov | Black Holes as a Collider of High Energy Particles | 3 pages, 3 figures | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | According to the Banados-Silk-West (BSW) process, rotating black holes can
act as particle colliders capable of achieving arbitrarily high center-of-mass
energy (CME), provided that a specific angular momentum of one of the particles
is present. In this discussion, we demonstrate that both Kerr black holes and
Schwar... | [
{
"created": "Tue, 4 Jul 2023 21:04:56 GMT",
"version": "v1"
}
] | 2023-07-06 | [
[
"Turimov",
"Bobur",
""
],
[
"Hayitov",
"Shuhrat",
""
]
] | According to the Banados-Silk-West (BSW) process, rotating black holes can act as particle colliders capable of achieving arbitrarily high center-of-mass energy (CME), provided that a specific angular momentum of one of the particles is present. In this discussion, we demonstrate that both Kerr black holes and Schwarzs... |
1509.08804 | Roberto De Pietri | Roberto De Pietri, Alessandra Feo, Francesco Maione, Frank L\"offler | Modeling Equal and Unequal Mass Binary Neutron Star Mergers Using Public
Codes | References and figures updated | Phys. Rev. D 93, 064047 (2016) | 10.1103/PhysRevD.93.064047 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present three-dimensional simulations of the dynamics of binary neutron
star (BNS) mergers from the late stage of the inspiral process up to $\sim 20$
ms after the system has merged, either to form a hyper-massive neutron star
(NS) or a rotating black hole (BH). We investigate five equal-mass models of
total gravi... | [
{
"created": "Tue, 29 Sep 2015 15:31:01 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Oct 2015 15:32:00 GMT",
"version": "v2"
},
{
"created": "Sat, 13 Feb 2016 09:05:39 GMT",
"version": "v3"
}
] | 2016-03-30 | [
[
"De Pietri",
"Roberto",
""
],
[
"Feo",
"Alessandra",
""
],
[
"Maione",
"Francesco",
""
],
[
"Löffler",
"Frank",
""
]
] | We present three-dimensional simulations of the dynamics of binary neutron star (BNS) mergers from the late stage of the inspiral process up to $\sim 20$ ms after the system has merged, either to form a hyper-massive neutron star (NS) or a rotating black hole (BH). We investigate five equal-mass models of total gravita... |
1910.08368 | Kangujam Priyokumar Singh | Kangujam Priyokumar Singh, Mahbubur Rahman Mollah, Rajshekhar Roy
Baruah and Meher Daimary | Interaction of Bianchi Type-I Anisotropic Cloud String Cosmological
Model Universe with Electromagnetic Field | This manuscript contains 15 pages and 4 figures. arXiv admin note:
text overlap with arXiv:1909.11444 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here, we have investigated the interaction of Bianchi type I anisotropic
cloud string cosmological model universe with electromagnetic field in the
context of general relativity. In this paper, the energy momentum tensor is
assumed to be the sum of the rest energy density and string tension density
with an electromag... | [
{
"created": "Tue, 15 Oct 2019 10:53:54 GMT",
"version": "v1"
}
] | 2019-10-21 | [
[
"Singh",
"Kangujam Priyokumar",
""
],
[
"Mollah",
"Mahbubur Rahman",
""
],
[
"Baruah",
"Rajshekhar Roy",
""
],
[
"Daimary",
"Meher",
""
]
] | Here, we have investigated the interaction of Bianchi type I anisotropic cloud string cosmological model universe with electromagnetic field in the context of general relativity. In this paper, the energy momentum tensor is assumed to be the sum of the rest energy density and string tension density with an electromagne... |
2105.05059 | Fulvio Melia | Fulvio Melia | Classicalization of Quantum Fluctuations at the Planck Scale in the
R_h=ct Universe | 14 pages, 2 figures. Accepted for publication in PLB | PLB 818 (2021) 136362, 11pp | 10.1016/j.physletb.2021.136362 | null | gr-qc astro-ph.CO hep-ph quant-ph | http://creativecommons.org/licenses/by/4.0/ | The quantum to classical transition of fluctuations in the early universe is
still not completely understood. Some headway has been made incorporating the
effects of decoherence and the squeezing of states, though the methods and
procedures continue to be challenged. But new developments in the analysis of
the most r... | [
{
"created": "Mon, 10 May 2021 15:13:50 GMT",
"version": "v1"
}
] | 2021-05-24 | [
[
"Melia",
"Fulvio",
""
]
] | The quantum to classical transition of fluctuations in the early universe is still not completely understood. Some headway has been made incorporating the effects of decoherence and the squeezing of states, though the methods and procedures continue to be challenged. But new developments in the analysis of the most rec... |
1404.6443 | Ahmadjon Abdujabbarov | Bobir Toshmatov, Bobomurat Ahmedov, Ahmadjon Abdujabbarov, Zdenek
Stuchlik | Rotating Regular Black Hole Solution | 7 pages, 6 figures, accepted for publication in Physical Review D | null | 10.1103/PhysRevD.89.104017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the Newman-Janis algorithm the Ayon-Beato-Garcia spacetime metric of
the regular spherically symmetric, static and charged black hole has been
converted into rotational form. It is shown that the derived solution for
rotating regular black hole is regular and the critical value of the electric
charge $Q$ for... | [
{
"created": "Thu, 24 Apr 2014 06:33:51 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Toshmatov",
"Bobir",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Abdujabbarov",
"Ahmadjon",
""
],
[
"Stuchlik",
"Zdenek",
""
]
] | Based on the Newman-Janis algorithm the Ayon-Beato-Garcia spacetime metric of the regular spherically symmetric, static and charged black hole has been converted into rotational form. It is shown that the derived solution for rotating regular black hole is regular and the critical value of the electric charge $Q$ for w... |
2006.01172 | Anna Ijjas | William G. Cook, Iryna A. Glushchenko, Anna Ijjas, Frans Pretorius and
Paul J. Steinhardt | Supersmoothing through Slow Contraction | 6 pages, 3 figures | Phys. Lett. B 808 (2020) 135690 | 10.1016/j.physletb.2020.135690 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Performing a fully non-perturbative analysis using the tools of numerical
general relativity, we demonstrate that a period of slow contraction is a
`supersmoothing' cosmological phase that homogenizes, isotropizes and flattens
the universe both classically and quantum mechanically and can do so far more
robustly and ... | [
{
"created": "Mon, 1 Jun 2020 18:04:28 GMT",
"version": "v1"
}
] | 2020-08-19 | [
[
"Cook",
"William G.",
""
],
[
"Glushchenko",
"Iryna A.",
""
],
[
"Ijjas",
"Anna",
""
],
[
"Pretorius",
"Frans",
""
],
[
"Steinhardt",
"Paul J.",
""
]
] | Performing a fully non-perturbative analysis using the tools of numerical general relativity, we demonstrate that a period of slow contraction is a `supersmoothing' cosmological phase that homogenizes, isotropizes and flattens the universe both classically and quantum mechanically and can do so far more robustly and ra... |
1905.06856 | Mohd Shahalam | M. Shahalam, R. Myrzakulov, Maxim Yu. Khlopov | Late time evolution of a nonminimally coupled scalar field system | 9 pages, 3 caption figures | Gen. Relativ. Gravit. (2019) 51:125 | 10.1007/s10714-019-2610-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the dynamics of a nonminimally coupled scalar field model in case
of $F(\phi)R$ coupling with $F(\phi)= 1-\xi\phi^2 $, and the potentials
$V(\phi) = V_0 (1+ \phi^p)^2$, $V(\phi)= V_0 e^{\lambda \phi^2}$. We use an
autonomous system to bring out new asymptotic regimes, and find stable
de-Sitter solution. Un... | [
{
"created": "Wed, 15 May 2019 06:38:48 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Sep 2019 04:25:23 GMT",
"version": "v2"
}
] | 2019-10-02 | [
[
"Shahalam",
"M.",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Khlopov",
"Maxim Yu.",
""
]
] | We revisit the dynamics of a nonminimally coupled scalar field model in case of $F(\phi)R$ coupling with $F(\phi)= 1-\xi\phi^2 $, and the potentials $V(\phi) = V_0 (1+ \phi^p)^2$, $V(\phi)= V_0 e^{\lambda \phi^2}$. We use an autonomous system to bring out new asymptotic regimes, and find stable de-Sitter solution. Unde... |
1907.06880 | Luis Granda | L. N. Granda | Finite scale factor and future singularities | 24 pages, 3 figures | Astrophys.Space Sci. 364 (2019) no.4, 61 | 10.1007/s10509-019-3549-5 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main characteristic of the dark energy is its negative pressure. In a
homogeneous and isotropic FRW background, we consider several models for the
dark energy fluid, which lead to finite time future singularities of the type
I-IV, by introducing the pressure density as a function of the scale factor.
This approac... | [
{
"created": "Tue, 16 Jul 2019 07:59:49 GMT",
"version": "v1"
}
] | 2019-07-17 | [
[
"Granda",
"L. N.",
""
]
] | The main characteristic of the dark energy is its negative pressure. In a homogeneous and isotropic FRW background, we consider several models for the dark energy fluid, which lead to finite time future singularities of the type I-IV, by introducing the pressure density as a function of the scale factor. This approach ... |
2301.05679 | Antonio Enea Romano | Antonio Enea Romano | Effective speed of cosmological perturbations | The first version of this paper was submitted to JCAP on February 7th
2023, and the first report was received on January 14th 2024. This is a
revised version based on the first referee report | Phys.Dark Univ. 45 (2024) 101549 | 10.1016/j.dark.2024.101549 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We derive an effective equation and action for comoving curvature
perturbations and gravitational waves (GWs) in terms of a time, momentum and
polarization dependent effective speed, encoding the effects of the interaction
among metric perturbations or with other fields, such as dark energy and dark
matter. The struc... | [
{
"created": "Fri, 13 Jan 2023 17:56:52 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Feb 2024 18:51:33 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Jun 2024 14:37:09 GMT",
"version": "v3"
}
] | 2024-06-21 | [
[
"Romano",
"Antonio Enea",
""
]
] | We derive an effective equation and action for comoving curvature perturbations and gravitational waves (GWs) in terms of a time, momentum and polarization dependent effective speed, encoding the effects of the interaction among metric perturbations or with other fields, such as dark energy and dark matter. The structu... |
1802.02574 | Piotr Bargiela | Piotr Bargiela | Transport of the light polarization in the weak gravitational wave
background | 3 pages, REVTeX | null | null | null | gr-qc physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The influence of the weak gravitational wave on the light polarization is
considered. Oscillations in the direction of the polarization vector is found.
| [
{
"created": "Wed, 7 Feb 2018 15:40:08 GMT",
"version": "v1"
}
] | 2018-02-09 | [
[
"Bargiela",
"Piotr",
""
]
] | The influence of the weak gravitational wave on the light polarization is considered. Oscillations in the direction of the polarization vector is found. |
1909.12846 | Ollie Burke | Ollie Burke, Jonathan R. Gair and Joan Sim\'on | Transition from Inspiral to Plunge: A Complete Near-Extremal Trajectory
and Associated Waveform | 25 pages, 7 figures, 1 Table. Accepted for publication in Phys. Rev.
D | Phys. Rev. D 101, 064026 (2020) | 10.1103/PhysRevD.101.064026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the Ori and Thorne (OT) procedure to compute the transition from an
adiabatic inspiral into a geodesic plunge for any spin, with emphasis on
near-extremal ones. Our analysis revisits the validity of the approximations
made in OT. In particular, we discuss possible effects coming from eccentricity
and non-ge... | [
{
"created": "Fri, 27 Sep 2019 18:00:03 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Feb 2020 10:25:18 GMT",
"version": "v2"
}
] | 2020-03-18 | [
[
"Burke",
"Ollie",
""
],
[
"Gair",
"Jonathan R.",
""
],
[
"Simón",
"Joan",
""
]
] | We extend the Ori and Thorne (OT) procedure to compute the transition from an adiabatic inspiral into a geodesic plunge for any spin, with emphasis on near-extremal ones. Our analysis revisits the validity of the approximations made in OT. In particular, we discuss possible effects coming from eccentricity and non-geod... |
2107.13436 | Sanjar Shaymatov | Javlon Rayimbaev, Sanjar Shaymatov, Mubasher Jamil | Dynamics of particles and epicyclic motions around
Schwarzschild-de-Sitter black hole in perfect fluid dark matter | 12 pages, 11 figures. Accepted for publication in Eur. Phys. J. C | Eur. Phys. J. C (2021) 81: 699 | 10.1140/epjc/s10052-021-09488-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we investigate circular orbits for test particles around
Schwarzschild-de Sitter (dS) black hole surrounded by perfect fluid dark
matter. We determine the region of circular orbits bounded by innermost and
outermost stable circular orbits. We show that the impact of the perfect fluid
dark matter shrinks... | [
{
"created": "Wed, 28 Jul 2021 15:30:37 GMT",
"version": "v1"
}
] | 2021-08-09 | [
[
"Rayimbaev",
"Javlon",
""
],
[
"Shaymatov",
"Sanjar",
""
],
[
"Jamil",
"Mubasher",
""
]
] | In this paper we investigate circular orbits for test particles around Schwarzschild-de Sitter (dS) black hole surrounded by perfect fluid dark matter. We determine the region of circular orbits bounded by innermost and outermost stable circular orbits. We show that the impact of the perfect fluid dark matter shrinks t... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.