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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0711.1817 | Clovis Jacinto de Matos | Clovis Jacinto de Matos | Gravitational force between two electrons in superconductors | null | null | null | null | gr-qc | null | The attractive gravitational force between two electrons in superconductors
is deduced from the Eddington-Dirac large number relation, together with Beck
and Mackey electromagnetic model of vacuum energy in superconductors. This
force is estimated to be weaker than the gravitational attraction between two
electrons i... | [
{
"created": "Mon, 12 Nov 2007 17:13:50 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Nov 2007 13:16:39 GMT",
"version": "v2"
}
] | 2007-11-19 | [
[
"de Matos",
"Clovis Jacinto",
""
]
] | The attractive gravitational force between two electrons in superconductors is deduced from the Eddington-Dirac large number relation, together with Beck and Mackey electromagnetic model of vacuum energy in superconductors. This force is estimated to be weaker than the gravitational attraction between two electrons in ... |
1701.03890 | Tahereh Azizi | Tahereh Azizi and Najibeh Borhani | Thermodynamics in f(T) gravity with nonminimal coupling to matter | Accepted for publication in Advances in High Energy Physics | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper, we study the thermodynamics behavior of the field
equations for the generalized f(T) gravity with an arbitrary coupling between
matter and the torsion scalar. In this regard, we explore the verification of
the first law of thermodynamics at the ap- parent horizon of the
Friedmann-Robertson-Walke... | [
{
"created": "Sat, 14 Jan 2017 08:40:18 GMT",
"version": "v1"
}
] | 2017-01-17 | [
[
"Azizi",
"Tahereh",
""
],
[
"Borhani",
"Najibeh",
""
]
] | In the present paper, we study the thermodynamics behavior of the field equations for the generalized f(T) gravity with an arbitrary coupling between matter and the torsion scalar. In this regard, we explore the verification of the first law of thermodynamics at the ap- parent horizon of the Friedmann-Robertson-Walker ... |
1307.6534 | Isaac Ram\'irez-Baca | Eloy Ay\'on-Beato, Alberto A. Garc\'ia, Pedro Isaac Ram\'irez-Baca,
Cesar A. Terrero-Escalante | The Conformal Stealth of any Standard Cosmology | 6 pages, accepted for publication on Physical Review D | Phys.Rev.D88:063523,2013 | 10.1103/PhysRevD.88.063523 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that any homogeneous and isotropic universe, independently of its
spatial topology and matter content, allows for the presence of a conformal
stealth, i.e. a nontrivial conformally invariant scalar field with vanishing
energy-momentum tensor, which evolves along with the universe without causing
even the ... | [
{
"created": "Wed, 24 Jul 2013 19:12:05 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Sep 2013 04:37:19 GMT",
"version": "v2"
}
] | 2014-06-11 | [
[
"Ayón-Beato",
"Eloy",
""
],
[
"García",
"Alberto A.",
""
],
[
"Ramírez-Baca",
"Pedro Isaac",
""
],
[
"Terrero-Escalante",
"Cesar A.",
""
]
] | It is shown that any homogeneous and isotropic universe, independently of its spatial topology and matter content, allows for the presence of a conformal stealth, i.e. a nontrivial conformally invariant scalar field with vanishing energy-momentum tensor, which evolves along with the universe without causing even the sm... |
1404.3929 | Angus Prain | Valerio Faraoni, Andres F. Zambrano Moreno and Angus Prain | The charged McVittie spacetime | null | Phys. Rev. D 89, 103514 (2014) | 10.1103/PhysRevD.89.103514 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The two-parameter charged McVittie solution of the Einstein equations is
revisited and its apparent horizons are discussed and located numerically (for
the extremal case, analytically). According to the parameter values, this
spacetime can be interpreted as a black hole, or a spacelike naked singularity,
in a spatial... | [
{
"created": "Tue, 15 Apr 2014 14:35:42 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Faraoni",
"Valerio",
""
],
[
"Moreno",
"Andres F. Zambrano",
""
],
[
"Prain",
"Angus",
""
]
] | The two-parameter charged McVittie solution of the Einstein equations is revisited and its apparent horizons are discussed and located numerically (for the extremal case, analytically). According to the parameter values, this spacetime can be interpreted as a black hole, or a spacelike naked singularity, in a spatially... |
2312.13297 | Kangujam Priyokumar Singh | Syed Sabanam and Kangujam Priyokumar Singh | Two fluids higher dimensional FRW cosmological model rejuvenating the
cosmological tests of parametrization of Hubble Parameter in Lyra geometry | 21 pages, 10 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | This paper has studied five-dimensional FRW cosmological models for
k=-1,0,1in the presence of two perfect fluids namely ordinary baryonic fluid
and a bizarre creating dark energy within the framework of Lyra's manifold
(Lyra 1951). We have obtained the exact solution of the equation assuming the
parametrization of t... | [
{
"created": "Mon, 18 Dec 2023 06:22:07 GMT",
"version": "v1"
}
] | 2023-12-22 | [
[
"Sabanam",
"Syed",
""
],
[
"Singh",
"Kangujam Priyokumar",
""
]
] | This paper has studied five-dimensional FRW cosmological models for k=-1,0,1in the presence of two perfect fluids namely ordinary baryonic fluid and a bizarre creating dark energy within the framework of Lyra's manifold (Lyra 1951). We have obtained the exact solution of the equation assuming the parametrization of the... |
1808.05254 | Oleg Zaslavskii | A. V. Toporensky and O. B. Zaslavskii | Zero-momentum trajectories inside a black hole and high energy particle
collisions | 24 pages. Matches published version | JCAP 12 (2019) 063 | 10.1088/1475-7516/2019/12/063 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider properties of the trajectory with the zero momentum inside a
spherically symmetric black hole. We work mostly in the Painlev\'{e}%
-Gullstrand frame and use the concept of the "river model of black hole". This
consept allows us to decompose (in a "cosmological manner") the geodesic motion
of a test partic... | [
{
"created": "Wed, 15 Aug 2018 18:59:54 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jul 2019 15:59:38 GMT",
"version": "v2"
},
{
"created": "Thu, 19 Sep 2019 17:50:36 GMT",
"version": "v3"
},
{
"created": "Wed, 25 Dec 2019 17:26:04 GMT",
"version": "v4"
}
] | 2019-12-30 | [
[
"Toporensky",
"A. V.",
""
],
[
"Zaslavskii",
"O. B.",
""
]
] | We consider properties of the trajectory with the zero momentum inside a spherically symmetric black hole. We work mostly in the Painlev\'{e}% -Gullstrand frame and use the concept of the "river model of black hole". This consept allows us to decompose (in a "cosmological manner") the geodesic motion of a test particle... |
gr-qc/0306059 | Daniele Colosi | Daniele Colosi, Carlo Rovelli | A simple background-independent hamiltonian quantum model | null | Phys.Rev. D68 (2003) 104008 | 10.1103/PhysRevD.68.104008 | null | gr-qc | null | We study formulation and probabilistic interpretation of a simple
general-relativistic hamiltonian quantum system. The system has no unitary
evolution in background time. The quantum theory yields transition
probabilities between measurable quantities (partial observables). These
converge to the classical predictions... | [
{
"created": "Fri, 13 Jun 2003 16:56:57 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Colosi",
"Daniele",
""
],
[
"Rovelli",
"Carlo",
""
]
] | We study formulation and probabilistic interpretation of a simple general-relativistic hamiltonian quantum system. The system has no unitary evolution in background time. The quantum theory yields transition probabilities between measurable quantities (partial observables). These converge to the classical predictions i... |
1609.09373 | Daisuke Ida | Daisuke Ida | Upper Bound for Diameter of Cosmological Black Holes and Nonexistence of
Black Strings | 10 pages, 1 figure | J.Math.Phys.58:102501,2017 | 10.1063/1.5008259 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The diameter of the apparent horizon, defined by the distance between
furthest points on the horizon, in spacetimes with a positive cosmological
constant $\varLambda$ has been investigated. It is established that the
diameter of the apparent horizon on the totally umbilic partial Cauchy surface
cannot exceed $2\pi/\s... | [
{
"created": "Thu, 29 Sep 2016 14:58:11 GMT",
"version": "v1"
},
{
"created": "Sun, 22 Oct 2017 14:19:11 GMT",
"version": "v2"
}
] | 2017-11-22 | [
[
"Ida",
"Daisuke",
""
]
] | The diameter of the apparent horizon, defined by the distance between furthest points on the horizon, in spacetimes with a positive cosmological constant $\varLambda$ has been investigated. It is established that the diameter of the apparent horizon on the totally umbilic partial Cauchy surface cannot exceed $2\pi/\sqr... |
1811.04495 | Sebastian Murk | Valentina Baccetti, Robert B. Mann, Sebastian Murk, and Daniel R.
Terno | Energy-momentum tensor and metric near the Schwarzschild sphere | 10 pages. Published version | Phys. Rev. D 99, 124014 (2019) | 10.1103/PhysRevD.99.124014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Regularity of the horizon radius $r_g$ of a collapsing body constrains a
limiting form of a spherically-symmetric energy-momentum tensor near it. Its
non-zero limit belongs to one of four classes that are distinguished only by
two signs. As a result, close to $r_g$ the geometry can always be described by
either an in... | [
{
"created": "Sun, 11 Nov 2018 22:18:17 GMT",
"version": "v1"
},
{
"created": "Tue, 14 May 2019 22:41:29 GMT",
"version": "v2"
},
{
"created": "Thu, 13 Jun 2019 06:01:30 GMT",
"version": "v3"
}
] | 2019-06-14 | [
[
"Baccetti",
"Valentina",
""
],
[
"Mann",
"Robert B.",
""
],
[
"Murk",
"Sebastian",
""
],
[
"Terno",
"Daniel R.",
""
]
] | Regularity of the horizon radius $r_g$ of a collapsing body constrains a limiting form of a spherically-symmetric energy-momentum tensor near it. Its non-zero limit belongs to one of four classes that are distinguished only by two signs. As a result, close to $r_g$ the geometry can always be described by either an ingo... |
1907.08987 | Ronaldo S. S. Vieira | Ronaldo S. S. Vieira | Self-gravitating razor-thin disks around black holes via multi-hole
seeds | 24 pages, 9 figures. Published in Classical and Quantum Gravity | Class. Qnatum Grav. 37, 205013 (2020) | 10.1088/1361-6382/aba99b | null | gr-qc astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct self-gravitating razor-thin disks of counterrotating dust around
Schwarzschild black holes (BHs) by applying the "displace, cut, and reflect"
method to known seed solutions representing multi-holes. All but one of the
sources of the seed solution generate the surrounding annular disk, whereas the
remaini... | [
{
"created": "Sun, 21 Jul 2019 15:22:27 GMT",
"version": "v1"
},
{
"created": "Wed, 8 May 2024 12:17:38 GMT",
"version": "v2"
}
] | 2024-05-09 | [
[
"Vieira",
"Ronaldo S. S.",
""
]
] | We construct self-gravitating razor-thin disks of counterrotating dust around Schwarzschild black holes (BHs) by applying the "displace, cut, and reflect" method to known seed solutions representing multi-holes. All but one of the sources of the seed solution generate the surrounding annular disk, whereas the remaining... |
2207.04461 | Shinji Tsujikawa | Masato Minamitsuji, Shinji Tsujikawa | Stability of neutron stars in Horndeski theories with Gauss-Bonnet
couplings | 27 pages, 5 figures | Phys. Rev. D 106, 064008 (2022) | 10.1103/PhysRevD.106.064008 | WUCG-22-05 | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | In Horndeski theories containing a scalar coupling with the Gauss-Bonnet (GB)
curvature invariant $R_{\rm GB}^2$, we study the existence and linear stability
of neutron star (NS) solutions on a static and spherically symmetric
background. For a scalar-GB coupling of the form $\alpha \xi(\phi) R_{\rm
GB}^2$, where $\x... | [
{
"created": "Sun, 10 Jul 2022 13:26:22 GMT",
"version": "v1"
}
] | 2022-09-08 | [
[
"Minamitsuji",
"Masato",
""
],
[
"Tsujikawa",
"Shinji",
""
]
] | In Horndeski theories containing a scalar coupling with the Gauss-Bonnet (GB) curvature invariant $R_{\rm GB}^2$, we study the existence and linear stability of neutron star (NS) solutions on a static and spherically symmetric background. For a scalar-GB coupling of the form $\alpha \xi(\phi) R_{\rm GB}^2$, where $\xi$... |
1001.1697 | Lorenzo Iorio | Lorenzo Iorio | Effect of Sun and Planet-Bound Dark Matter on Planet and Satellite
Dynamics in the Solar System | LaTex2e, 17 pages, no figures, 7 tables, 61 references. Small problem
with a reference fixed. To appear in Journal of Cosmology and Astroparticle
Physics (JCAP) | JCAP 1005:018, 2010 | 10.1088/1475-7516/2010/05/018 | null | gr-qc astro-ph.EP hep-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply our recent results on orbital dynamics around a mass-varying central
body to the phenomenon of accretion of Dark Matter-assumed not
self-annihilating-on the Sun and the major bodies of the solar system due to
its motion throughout the Milky Way halo. We inspect its consequences on the
orbits of the planets a... | [
{
"created": "Mon, 11 Jan 2010 16:57:01 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jan 2010 17:36:42 GMT",
"version": "v2"
},
{
"created": "Sun, 17 Jan 2010 14:44:25 GMT",
"version": "v3"
},
{
"created": "Sat, 23 Jan 2010 06:17:40 GMT",
"version": "v4"
},
{
"c... | 2012-07-31 | [
[
"Iorio",
"Lorenzo",
""
]
] | We apply our recent results on orbital dynamics around a mass-varying central body to the phenomenon of accretion of Dark Matter-assumed not self-annihilating-on the Sun and the major bodies of the solar system due to its motion throughout the Milky Way halo. We inspect its consequences on the orbits of the planets and... |
1909.08414 | Branislav Cvetkovi\'c | Branislav Cvetkovi\'c and Dejan Simi\'c | Velocity memory effect without soft particles | LaTeX, 10 pages, 10 figures; v2, revised version, presentation
improved, 11 pages, 10 figures | Phys. Rev. D 101, 024006 (2020) | 10.1103/PhysRevD.101.024006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the behavior of geodesics in the plane-fronted wave background of
the three-dimensional (3D) gravity with propagating torsion, which possesses
only massive degrees of freedom. We discover the velocity memory effect, in
contrast to the current belief that its existence is due to the presence of
soft particles... | [
{
"created": "Wed, 18 Sep 2019 12:54:33 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Mar 2020 22:15:57 GMT",
"version": "v2"
}
] | 2020-03-19 | [
[
"Cvetković",
"Branislav",
""
],
[
"Simić",
"Dejan",
""
]
] | We study the behavior of geodesics in the plane-fronted wave background of the three-dimensional (3D) gravity with propagating torsion, which possesses only massive degrees of freedom. We discover the velocity memory effect, in contrast to the current belief that its existence is due to the presence of soft particles. |
gr-qc/0501071 | D\"orte Hansen | D\"orte Hansen | Motion and gravitational radiation of a binary system consisting of an
oscillating and rotating coplanar dusty disk and a point-like object | 26 pages, 8 figures | Gen.Rel.Grav. 37 (2005) 1781-1807 | 10.1007/s10714-005-0159-z | null | gr-qc | null | A binary system composed of an oscillating and rotating coplanar dusty disk
and a point mass is considered. The conservative dynamics is treated on the
Newtonian level. The effects of gravitational radiation reaction and wave
emission are studied to leading quadrupole order. The related waveforms are
given. The dynam... | [
{
"created": "Tue, 25 Jan 2005 12:52:48 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Hansen",
"Dörte",
""
]
] | A binary system composed of an oscillating and rotating coplanar dusty disk and a point mass is considered. The conservative dynamics is treated on the Newtonian level. The effects of gravitational radiation reaction and wave emission are studied to leading quadrupole order. The related waveforms are given. The dynamic... |
gr-qc/9902025 | T. R. Mongan | T. R. Mongan | N + 1 dimensional quantum mechanical model for a closed universe | To be published in International Journal of Theoretical Physics, May
1999 | Int.J.Theor.Phys. 38 (1999) 1521-1529 | null | null | gr-qc | null | A quantum mechanical model for an N + 1 dimensional universe arising from a
quantum fluctuation is outlined. (3 + 1) dimensions are a closed
infinitely-expanding universe and the remaining N - 3 dimensions are compact.
The (3 + 1) non-compact dimensions are modeled by quantizing a canonical
Hamiltonian description of... | [
{
"created": "Wed, 10 Feb 1999 04:55:44 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mongan",
"T. R.",
""
]
] | A quantum mechanical model for an N + 1 dimensional universe arising from a quantum fluctuation is outlined. (3 + 1) dimensions are a closed infinitely-expanding universe and the remaining N - 3 dimensions are compact. The (3 + 1) non-compact dimensions are modeled by quantizing a canonical Hamiltonian description of a... |
1211.6369 | Salvador Robles-Perez | S. J. Robles-P\'erez | Third quantization: modeling the universe as a 'particle' in a quantum
field theory of the minisuperspace | 4 pages. Proceedings of the International Conference on Mathematical
Modeling in Physical Sciences, September 3-7, 2012, Budapest, Hungary | Journal of Physics: Conference Series, 410 (2013) 012133 | 10.1088/1742-6596/410/1/012133 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The third quantization formalism of quantum cosmology adds simplicity and
conceptual insight into the quantum description of the multiverse. Within such
a formalism, the existence of squeezed and entangled states raises the question
of whether the complementary principle of quantum mechanics has to be extended
to the... | [
{
"created": "Tue, 27 Nov 2012 17:37:43 GMT",
"version": "v1"
}
] | 2017-08-04 | [
[
"Robles-Pérez",
"S. J.",
""
]
] | The third quantization formalism of quantum cosmology adds simplicity and conceptual insight into the quantum description of the multiverse. Within such a formalism, the existence of squeezed and entangled states raises the question of whether the complementary principle of quantum mechanics has to be extended to the q... |
2101.07064 | Eric Huguet | E. Huguet, M. Le Delliou and M. Fontanini | Cartan approach to Teleparallel Equivalent to General Relativity: a
review | From the (web)Teleparallel Gravity Workshop COSMOGRAV 2020 Tartu june
15-19. Revtex 9 pages | Int. Jou. Geom. Meth. Mod. Phys, 18 supp01, 21400041 (2021) | 10.1142/S0219887821400041 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In previous works, questioning the mathematical nature of the connection in
the translations gauge theory formulation of Teleparallel Equivalent to General
Relativity (TEGR) Theory led us to propose a new formulation using a Cartan
connection. In this review, we summarize the presentation of that proposal and
discuss... | [
{
"created": "Mon, 18 Jan 2021 13:22:53 GMT",
"version": "v1"
}
] | 2021-10-06 | [
[
"Huguet",
"E.",
""
],
[
"Delliou",
"M. Le",
""
],
[
"Fontanini",
"M.",
""
]
] | In previous works, questioning the mathematical nature of the connection in the translations gauge theory formulation of Teleparallel Equivalent to General Relativity (TEGR) Theory led us to propose a new formulation using a Cartan connection. In this review, we summarize the presentation of that proposal and discuss i... |
1310.1528 | Luc Blanchet | Luc Blanchet | Post-Newtonian Theory for Gravitational Waves | 285 pages, 13 figures, 600 references; Matches version published in
Living Review in Relativity 27, 4 (2024) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To be observed and analyzed by the network of current gravitational wave
detectors (LIGO, Virgo, KAGRA), and in anticipation of future third generation
ground based (Einstein Telescope, Cosmic Explorer) and space borne (LISA)
detectors, inspiralling compact binaries -- binary star systems composed of
neutron stars an... | [
{
"created": "Sun, 6 Oct 2013 02:23:37 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Feb 2014 17:58:20 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Jan 2016 17:14:00 GMT",
"version": "v3"
},
{
"created": "Wed, 17 Feb 2016 10:43:36 GMT",
"version": "v4"
},
{
"cr... | 2024-07-16 | [
[
"Blanchet",
"Luc",
""
]
] | To be observed and analyzed by the network of current gravitational wave detectors (LIGO, Virgo, KAGRA), and in anticipation of future third generation ground based (Einstein Telescope, Cosmic Explorer) and space borne (LISA) detectors, inspiralling compact binaries -- binary star systems composed of neutron stars and/... |
2112.15050 | Nicolai Rothe | Hanno Gottschalk and Nicolai Rothe and Daniel Siemssen | Special cosmological models derived from the semiclassical Einstein
equation on flat FLRW space-times | 29 pages, 12 figures | Classical and Quantum Gravity, Volume 39, Issue 12, Page 125004,
Year 2022 | 10.1088/1361-6382/ac6e22 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article presents numerical work on a special case of the cosmological
semiclassical Einstein equation (SCE). The SCE describes the interaction of
relativistic quantum matter by the expected value of the renormalized
stress-energy tensor of a quantum field with classical gravity. Here we
consider a free massless ... | [
{
"created": "Thu, 30 Dec 2021 13:22:09 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jun 2022 20:48:19 GMT",
"version": "v2"
}
] | 2022-06-17 | [
[
"Gottschalk",
"Hanno",
""
],
[
"Rothe",
"Nicolai",
""
],
[
"Siemssen",
"Daniel",
""
]
] | This article presents numerical work on a special case of the cosmological semiclassical Einstein equation (SCE). The SCE describes the interaction of relativistic quantum matter by the expected value of the renormalized stress-energy tensor of a quantum field with classical gravity. Here we consider a free massless sc... |
gr-qc/0008024 | Gaston Giribet | Gaston Giribet, Claudio Simeone | Global phase time and path integral for string cosmological models | 12 pages, added references | Mod.Phys.Lett. A16 (2001) 19 | 10.1142/S0217732301003061 | null | gr-qc hep-th math-ph math.MP | null | A global phase time is identified for homogeneous and isotropic cosmological
models yielding from the low energy effective action of closed bosonic string
theory. When the Hamiltonian constraint allows for the existence of an
intrinsic time, the quantum transition amplitude is obtained by means of the
usual path inte... | [
{
"created": "Thu, 10 Aug 2000 19:35:41 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jan 2001 21:09:41 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Giribet",
"Gaston",
""
],
[
"Simeone",
"Claudio",
""
]
] | A global phase time is identified for homogeneous and isotropic cosmological models yielding from the low energy effective action of closed bosonic string theory. When the Hamiltonian constraint allows for the existence of an intrinsic time, the quantum transition amplitude is obtained by means of the usual path integr... |
1111.6277 | Stefan Hild | Stefan Hild | Beyond the Second Generation of Laser-Interferometric Gravitational Wave
Observatories | Amaldi 9 proceedings | null | 10.1088/0264-9381/29/12/124006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article gives an overview of potential upgrades of second generation
gravitational wave detectors and the required key technologies to improve the
limiting noise sources. In addition the baseline design of the Einstein
Telescope, a European third generation gravitational wave observatory, is
briefly discussed.
| [
{
"created": "Sun, 27 Nov 2011 17:17:43 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Hild",
"Stefan",
""
]
] | This article gives an overview of potential upgrades of second generation gravitational wave detectors and the required key technologies to improve the limiting noise sources. In addition the baseline design of the Einstein Telescope, a European third generation gravitational wave observatory, is briefly discussed. |
2112.12159 | Mark Hertzberg | Mark P. Hertzberg, Jacob A. Litterer | Bound on Quantum Fluctuations in Gravitational Waves from LIGO-Virgo | 11 pages, 3 figures, in double column format. V2: Updated
introduction and referencing. V3: Updated towards version published in JCAP | JCAP 03 (2023) 009 | 10.1088/1475-7516/2023/03/009 | null | gr-qc astro-ph.CO hep-ph hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive some of the central equations governing quantum fluctuations in
gravitational waves, making use of general relativity as a sensible effective
quantum theory at large distances. We begin with a review of classical
gravitational waves in general relativity, including the energy in each mode.
We then form the ... | [
{
"created": "Wed, 22 Dec 2021 19:00:03 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Feb 2022 18:01:37 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Mar 2023 16:58:32 GMT",
"version": "v3"
}
] | 2023-03-06 | [
[
"Hertzberg",
"Mark P.",
""
],
[
"Litterer",
"Jacob A.",
""
]
] | We derive some of the central equations governing quantum fluctuations in gravitational waves, making use of general relativity as a sensible effective quantum theory at large distances. We begin with a review of classical gravitational waves in general relativity, including the energy in each mode. We then form the qu... |
gr-qc/0003005 | Sawa Manoff | S. Manoff | Kinematics of vector fields | 44 pages, LaTeX 2e, Published in Complex structures and vector
fields. (World Scientific, Singapore 1995), pp. 61-113 | null | null | null | gr-qc | null | Different (not only by sign) affine connections are introduced for
contravariant and covariant tensor fields over a differentiable manifold by
means of a non-canonical contraction operator, defining the notion dual bases
and commuting with the covariant and with the Lie-differential operator.
Classification of the li... | [
{
"created": "Thu, 2 Mar 2000 09:08:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Manoff",
"S.",
""
]
] | Different (not only by sign) affine connections are introduced for contravariant and covariant tensor fields over a differentiable manifold by means of a non-canonical contraction operator, defining the notion dual bases and commuting with the covariant and with the Lie-differential operator. Classification of the line... |
1610.00519 | Joan Josep Ferrando | Bartolom\'e Coll, Joan Josep Ferrando and Juan Antonio S\'aez | Relativistic perfect fluids in local thermal equilibrium | 22 pages; minor changes | Gen Relativ Gravit (2017) 49:66 | 10.1007/s10714-017-2225-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Every evolution of a fluid is uniquely described by an energy tensor. But the
converse is not true: an energy tensor may describe the evolution of different
fluids. The problem of determining them is called here the {\em inverse
problem}. This problem may admit unphysical or non-deterministic solutions.
This paper is... | [
{
"created": "Mon, 3 Oct 2016 12:49:16 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Apr 2017 14:43:21 GMT",
"version": "v2"
}
] | 2017-04-13 | [
[
"Coll",
"Bartolomé",
""
],
[
"Ferrando",
"Joan Josep",
""
],
[
"Sáez",
"Juan Antonio",
""
]
] | Every evolution of a fluid is uniquely described by an energy tensor. But the converse is not true: an energy tensor may describe the evolution of different fluids. The problem of determining them is called here the {\em inverse problem}. This problem may admit unphysical or non-deterministic solutions. This paper is d... |
1411.6294 | Yaghoub Heydarzade | Y. Heydarzade, N. Riazi, H. Moradpour | Phantom Wormhole Solutions in a Generic Cosmological Constant Background | 13 pages, 1 figure in Canadian Journal of Physics | Can. J. Phys. 2015, 93(12): 1523-1531 | 10.1139/cjp-2015-0359 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are a number of reasons to study wormholes with generic cosmological
constant $\Lambda$. Recent observations indicate that present accelerating
expansion of the universe demands $\Lambda>0$. On the other hand, some extended
theories of gravitation such as supergravity and superstring theories posses
vacuum stat... | [
{
"created": "Sun, 23 Nov 2014 20:16:10 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jan 2015 21:21:02 GMT",
"version": "v2"
},
{
"created": "Thu, 30 Jul 2015 12:53:05 GMT",
"version": "v3"
}
] | 2015-11-24 | [
[
"Heydarzade",
"Y.",
""
],
[
"Riazi",
"N.",
""
],
[
"Moradpour",
"H.",
""
]
] | There are a number of reasons to study wormholes with generic cosmological constant $\Lambda$. Recent observations indicate that present accelerating expansion of the universe demands $\Lambda>0$. On the other hand, some extended theories of gravitation such as supergravity and superstring theories posses vacuum states... |
1602.08738 | Asya Aminova | Asya V. Aminova, Dieter R. Brill, Pavel I. Chumarov and Aleksandr Yu.
Shemakhin | On the cylindrically symmetric wormholes WhCR^e: The motion of test
particles | 16 pages, 6 figures | Phys. Rev. D 94, 024027 (2016) | 10.1103/PhysRevD.94.024027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we partially implement the program outlined in the previous
paper of the authors [A. V. Aminova and P. I. Chumarov, Phys. Rev. D 88, 044005
(2013)]. The program owes its origins to the following comment in paper [M.
Cveti\v{c} and D. Youm, Nucl. Phys. B, 438, 182 (1995), Addendum-ibid. 449,146
(1995)]... | [
{
"created": "Sun, 28 Feb 2016 16:30:25 GMT",
"version": "v1"
}
] | 2016-07-27 | [
[
"Aminova",
"Asya V.",
""
],
[
"Brill",
"Dieter R.",
""
],
[
"Chumarov",
"Pavel I.",
""
],
[
"Shemakhin",
"Aleksandr Yu.",
""
]
] | In this article we partially implement the program outlined in the previous paper of the authors [A. V. Aminova and P. I. Chumarov, Phys. Rev. D 88, 044005 (2013)]. The program owes its origins to the following comment in paper [M. Cveti\v{c} and D. Youm, Nucl. Phys. B, 438, 182 (1995), Addendum-ibid. 449,146 (1995)], ... |
1408.1779 | Caio Macedo | Caio F. B. Macedo and Lu\'is C. B. Crispino | Absorption of planar massless scalar waves by Bardeen regular black
holes | 8 pages, 10 figures. v2: minor modifications, final version | Phys. Rev. D 90, 064001 (2014) | 10.1103/PhysRevD.90.064001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Accretion of fields by black holes is a subject of great interest in physics.
It is known that accretion plays a fundamental role in active galactic nuclei
and in the evolution of black holes. Accretion of fundamental fields is often
related to the study of absorption cross section. Basically all black holes for
whic... | [
{
"created": "Fri, 8 Aug 2014 08:05:02 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Sep 2014 13:48:47 GMT",
"version": "v2"
}
] | 2014-09-10 | [
[
"Macedo",
"Caio F. B.",
""
],
[
"Crispino",
"Luís C. B.",
""
]
] | Accretion of fields by black holes is a subject of great interest in physics. It is known that accretion plays a fundamental role in active galactic nuclei and in the evolution of black holes. Accretion of fundamental fields is often related to the study of absorption cross section. Basically all black holes for which ... |
2111.05090 | Guo-Ping Li | Xiao-Xiong Zeng, Ke-Jian He and Guo-Ping Li | Effect of dark matter on shadows and rings of a brane-world black hole
illuminated by various accretions | 66figures, 4tables, 26pages,accepted by SCIENCE CHINA Physics,
Mechanics & Astronomy,2022 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, by taking the accretions into account, the observational
shadows and rings casted by the Brane-world black hole are numerically
investigated when the observer located at the cosmological horizon. The results
here show that the radius $r_p$ of photon sphere increased with cosmological
parameter $\alpha$... | [
{
"created": "Tue, 9 Nov 2021 12:47:32 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jun 2022 03:21:12 GMT",
"version": "v2"
}
] | 2022-06-10 | [
[
"Zeng",
"Xiao-Xiong",
""
],
[
"He",
"Ke-Jian",
""
],
[
"Li",
"Guo-Ping",
""
]
] | In this paper, by taking the accretions into account, the observational shadows and rings casted by the Brane-world black hole are numerically investigated when the observer located at the cosmological horizon. The results here show that the radius $r_p$ of photon sphere increased with cosmological parameter $\alpha$ a... |
1508.00534 | Gerald Cleaver | Jeff S. Lee and Gerald B. Cleaver | Relativistic Drag and Emission Radiation Pressures in an Isotropic
Photonic Gas | 18 pages, 10 figures | Mod. Phys. Lett. A, Vol. 31, No. 19 (2016) 1650118 | 10.1142/S0217732316501182 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By invoking the relativistic spectral radiance, as derived by Lee and Cleaver
[1], the drag radiation pressure of a relativistic planar surface moving
through an isotropic radiation field, with which it is in thermal equilibrium,
is determined in inertial and non-inertial frames. The forward- and
rearward-directed em... | [
{
"created": "Thu, 30 Jul 2015 04:53:43 GMT",
"version": "v1"
}
] | 2016-06-23 | [
[
"Lee",
"Jeff S.",
""
],
[
"Cleaver",
"Gerald B.",
""
]
] | By invoking the relativistic spectral radiance, as derived by Lee and Cleaver [1], the drag radiation pressure of a relativistic planar surface moving through an isotropic radiation field, with which it is in thermal equilibrium, is determined in inertial and non-inertial frames. The forward- and rearward-directed emis... |
2109.08252 | Helder A. S. Costa | O. P. de S\'a Neto, I. G. da Paz, P. R. S. Carvalho, H. A. S. Costa | Parameter estimation in an anisotropic expanding spacetime | 20 pages, 4 figures | null | null | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | In this work, we investigate how the anisotropy affects the cosmological
parameters estimation. Here the anisotropy is incorporated as a small
gravitational disturbance. We calculate the Fisher information for both
cosmological parameters $\epsilon$ (expansion volume) and $\rho$ (expansion
rate), and we show that the... | [
{
"created": "Thu, 16 Sep 2021 23:38:53 GMT",
"version": "v1"
}
] | 2021-09-20 | [
[
"Neto",
"O. P. de Sá",
""
],
[
"da Paz",
"I. G.",
""
],
[
"Carvalho",
"P. R. S.",
""
],
[
"Costa",
"H. A. S.",
""
]
] | In this work, we investigate how the anisotropy affects the cosmological parameters estimation. Here the anisotropy is incorporated as a small gravitational disturbance. We calculate the Fisher information for both cosmological parameters $\epsilon$ (expansion volume) and $\rho$ (expansion rate), and we show that the a... |
2208.11664 | S. M. M. Rasouli | S. M. M. Rasouli, S. Jalalzadeh and P. V. Moniz | Noncompactified Kaluza--Klein Gravity | 23 pages | Universe 2022, 8, 431 | 10.3390/universe8080431 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a brief description of noncompactified higher-dimensional theories
from the perspective of general relativity. More concretely, the
Space-Time-Matter theory, or Induced Matter theory, and the reduction procedure
used to construct the modified Brans-Dicke theory and the modified
S\'{a}ez-Ballester theory ar... | [
{
"created": "Wed, 24 Aug 2022 16:58:04 GMT",
"version": "v1"
}
] | 2022-08-25 | [
[
"Rasouli",
"S. M. M.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Moniz",
"P. V.",
""
]
] | We present a brief description of noncompactified higher-dimensional theories from the perspective of general relativity. More concretely, the Space-Time-Matter theory, or Induced Matter theory, and the reduction procedure used to construct the modified Brans-Dicke theory and the modified S\'{a}ez-Ballester theory are ... |
1902.09131 | Oscar Castillo Felisola Dr. | Oscar Castillo-Felisola | Beyond Einstein: A Polynomial Affine Model of Gravity | null | Gravity: Geoscience Applications, Industrial Technology and
Quantum Aspect (2018). Chapter 9. Pag. 183--201 | 10.5772/intechopen.70951 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the effective field equations for a recently formulated
polynomial affine model of gravity, in the sector of a torsion-free connection,
accept general Einstein manifolds---with or without cosmological constant---as
solutions. Moreover, the effective field equations are partially those obtained
from a gra... | [
{
"created": "Mon, 25 Feb 2019 08:11:36 GMT",
"version": "v1"
}
] | 2019-02-26 | [
[
"Castillo-Felisola",
"Oscar",
""
]
] | We show that the effective field equations for a recently formulated polynomial affine model of gravity, in the sector of a torsion-free connection, accept general Einstein manifolds---with or without cosmological constant---as solutions. Moreover, the effective field equations are partially those obtained from a gravi... |
1711.06628 | Sunny Vagnozzi | Luca Visinelli, Nadia Bolis, and Sunny Vagnozzi | Brane-world extra dimensions in light of GW170817 | 9 pages, 3 figures, version accepted by PRD. The MCMC code, chains,
and scripts to reproduce our results and plots can be found at
http://github.com/sunnyvagnozzi/Braneworld-extra-dimensions | Phys. Rev. D 97 (2018) 064039 | 10.1103/PhysRevD.97.064039 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The search for extra dimensions is a challenging endeavor to probe physics
beyond the Standard Model. The joint detection of gravitational waves (GW) and
electromagnetic (EM) signals from the merging of a binary system of compact
objects like neutron stars (NS), can help constrain the geometry of extra
dimensions bey... | [
{
"created": "Thu, 16 Nov 2017 14:26:50 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Nov 2017 11:49:19 GMT",
"version": "v2"
},
{
"created": "Thu, 15 Mar 2018 12:42:50 GMT",
"version": "v3"
}
] | 2019-09-11 | [
[
"Visinelli",
"Luca",
""
],
[
"Bolis",
"Nadia",
""
],
[
"Vagnozzi",
"Sunny",
""
]
] | The search for extra dimensions is a challenging endeavor to probe physics beyond the Standard Model. The joint detection of gravitational waves (GW) and electromagnetic (EM) signals from the merging of a binary system of compact objects like neutron stars (NS), can help constrain the geometry of extra dimensions beyon... |
1201.1227 | Emilio Elizalde | Jaume de Haro, Emilio Elizalde | Gravitational particle production in massive chaotic inflation and the
moduli problem | 4 pages, no figures; to be published in Phys Rev Lett | null | 10.1103/PhysRevLett.108.061303 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Particle production from vacuum fluctuations during inflation is briefly
revisited. The moduli problem occurring with light particles produced at the
end of inflation is addressed, namely the fact that some results are in
disagreement with nucleosynthesis constrains. A universal solution to this
problem is found whic... | [
{
"created": "Thu, 5 Jan 2012 17:38:06 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"de Haro",
"Jaume",
""
],
[
"Elizalde",
"Emilio",
""
]
] | Particle production from vacuum fluctuations during inflation is briefly revisited. The moduli problem occurring with light particles produced at the end of inflation is addressed, namely the fact that some results are in disagreement with nucleosynthesis constrains. A universal solution to this problem is found which ... |
2310.07012 | Akram Hassein | Akram Hasseine | Effective Hamiltonian of the k=+1 FRW model from the K-Quantization
method in LQC | 23 pages, 3 figures in preparation for submitting in a journal | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the effective theory of loop quantum cosmology LQC, the influence of the
holonomy correction (with $\overline{\mu}$-scheme) on the homogeneous and the
inhomogeneous cosmological models have been extensively studied in the case of
flat space. In this paper,using the K-Quantization method and the
$\overline{\mu}$-sc... | [
{
"created": "Tue, 10 Oct 2023 20:53:13 GMT",
"version": "v1"
}
] | 2023-10-12 | [
[
"Hasseine",
"Akram",
""
]
] | In the effective theory of loop quantum cosmology LQC, the influence of the holonomy correction (with $\overline{\mu}$-scheme) on the homogeneous and the inhomogeneous cosmological models have been extensively studied in the case of flat space. In this paper,using the K-Quantization method and the $\overline{\mu}$-sche... |
0902.1532 | Ishwaree Neupane | Ishwaree P. Neupane and Holly Trowland | Constraining the runaway dilaton and quintessential dark energy | 32 pages, several eps figures; refs added, matches published version | Int.J.Mod.Phys.D19:367-394,2010 | 10.1142/S0218271810016415 | UOC-TP 012/09 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dark Energy is some of the weirdest and most mysterious stuff in the universe
that tends to increase the rate of expansion of the universe. Two commonly
known forms of dark energy are the cosmological constant, a constant energy
density filling space homogeneously, and scalar fields such as quintessence or
moduli who... | [
{
"created": "Tue, 10 Feb 2009 20:52:44 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Aug 2009 02:18:14 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Mar 2010 04:08:56 GMT",
"version": "v3"
}
] | 2010-04-28 | [
[
"Neupane",
"Ishwaree P.",
""
],
[
"Trowland",
"Holly",
""
]
] | Dark Energy is some of the weirdest and most mysterious stuff in the universe that tends to increase the rate of expansion of the universe. Two commonly known forms of dark energy are the cosmological constant, a constant energy density filling space homogeneously, and scalar fields such as quintessence or moduli whose... |
gr-qc/9607068 | Bruce Allen | Bruce Allen and Adrian C. Ottewill | Detection of Anisotropies in the Gravitational-Wave Stochastic
Background | 25 pages, Latex with RevTeX and epsfig, now includes S/N ratio
calculations, expected response from anisotropy due to local motion & sources
in galaxy | Phys.Rev.D56:545-563,1997 | 10.1103/PhysRevD.56.545 | WISC-MILW-96-TH-15 | gr-qc | null | By correlating the signals from a pair of gravitational-wave detectors, one
can undertake sensitive searches for a stochastic background of gravitational
radiation. If the stochastic background is anisotropic, then this correlated
signal varies harmonically with the earth's rotation. We calculate how the
harmonics of... | [
{
"created": "Fri, 26 Jul 1996 17:19:19 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Dec 1996 19:10:30 GMT",
"version": "v2"
}
] | 2009-12-30 | [
[
"Allen",
"Bruce",
""
],
[
"Ottewill",
"Adrian C.",
""
]
] | By correlating the signals from a pair of gravitational-wave detectors, one can undertake sensitive searches for a stochastic background of gravitational radiation. If the stochastic background is anisotropic, then this correlated signal varies harmonically with the earth's rotation. We calculate how the harmonics of t... |
gr-qc/0009002 | Bijan Saha | Bijan Saha (LIT, JINR, Dubna, Russia) | Dirac Spinor in Bianchi-I Universe with Time Dependent Gravitational and
Cosmological Constants | 7 pages, RevTex | Mod.Phys.Lett. A16 (2001) 1287-1296 | 10.1142/S0217732301004546 | null | gr-qc | null | Self-consistent system of nonlinear spinor field and Bianchi I (BI)
gravitational one with time dependent gravitational constant ($G$) and
cosmological constant ($\Lambda$) has been studied. The initial and the
asymptotic behaviors of the field functions and the metric one have been
thoroughly investigated. Given $\L... | [
{
"created": "Fri, 1 Sep 2000 14:24:11 GMT",
"version": "v1"
}
] | 2015-05-01 | [
[
"Saha",
"Bijan",
"",
"LIT, JINR, Dubna, Russia"
]
] | Self-consistent system of nonlinear spinor field and Bianchi I (BI) gravitational one with time dependent gravitational constant ($G$) and cosmological constant ($\Lambda$) has been studied. The initial and the asymptotic behaviors of the field functions and the metric one have been thoroughly investigated. Given $\Lam... |
gr-qc/9803066 | 3 | Donald E. Neville | Long range correlations in quantum gravity | 29 pages; LaTex; 9 figures in .eps files | Phys. Rev. D 59, 044032 (1999) | 10.1103/PhysRevD.59.044032 | TU-317-98 | gr-qc | null | Smolin has pointed out that the spin network formulation of quantum gravity
will not necessarily possess the long range correlations needed for a proper
classical limit; typically, the action of the scalar constraint is too local.
Thiemann's length operator is used to argue for a further restriction on the
action of ... | [
{
"created": "Wed, 18 Mar 1998 16:59:39 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Neville",
"Donald E.",
""
]
] | Smolin has pointed out that the spin network formulation of quantum gravity will not necessarily possess the long range correlations needed for a proper classical limit; typically, the action of the scalar constraint is too local. Thiemann's length operator is used to argue for a further restriction on the action of th... |
gr-qc/0105046 | Andri M. Gretarsson | N. Nakagawa, A. M. Gretarsson, E.K. Gustafson, and M.M. Fejer | Thermal noise in half infinite mirrors with non-uniform loss: a slab of
excess loss in a half infinite mirror | Passed LSC (internal) review. Submitted to Phys. Rev. D. (5/2001)
Replacement: Minor typo in Eq. 17 corrected | Phys.Rev.D65:102001,2002 | 10.1103/PhysRevD.65.102001 | null | gr-qc | null | We calculate the thermal noise in half-infinite mirrors containing a layer of
arbitrary thickness and depth made of excessively lossy material but with the
same elastic material properties as the substrate. For the special case of a
thin lossy layer on the surface of the mirror, the excess noise scales as the
ratio o... | [
{
"created": "Sun, 13 May 2001 22:42:46 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jun 2001 18:08:15 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Nakagawa",
"N.",
""
],
[
"Gretarsson",
"A. M.",
""
],
[
"Gustafson",
"E. K.",
""
],
[
"Fejer",
"M. M.",
""
]
] | We calculate the thermal noise in half-infinite mirrors containing a layer of arbitrary thickness and depth made of excessively lossy material but with the same elastic material properties as the substrate. For the special case of a thin lossy layer on the surface of the mirror, the excess noise scales as the ratio of ... |
2408.07459 | Sofie Marie Koksbang | Asha B. Modan and S. M. Koksbang | On the convergence of cosmographic expansions in Lemaitre-Tolman-Bondi
models | 26 pages incl. 4 tables and 10 captioned figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study cosmographic expansions of the luminosity distance for a variety of
Lemaitre-Tolman-Bondi models which we specify inspired by local large-scale
structures of the universe. We consider cosmographic expansions valid for
general spacetimes and compare to the Friedmann-Lemaitre-Robertson-Walker
(FLRW) limit of t... | [
{
"created": "Wed, 14 Aug 2024 11:04:21 GMT",
"version": "v1"
}
] | 2024-08-15 | [
[
"Modan",
"Asha B.",
""
],
[
"Koksbang",
"S. M.",
""
]
] | We study cosmographic expansions of the luminosity distance for a variety of Lemaitre-Tolman-Bondi models which we specify inspired by local large-scale structures of the universe. We consider cosmographic expansions valid for general spacetimes and compare to the Friedmann-Lemaitre-Robertson-Walker (FLRW) limit of the... |
1511.01279 | Roberto Casadio | Roberto Casadio, Andrea Giugno, Octavian Micu, Alessio Orlandi | Thermal BEC black holes | 30 pages, pdflatex with 6 figures. Review paper prepared for Entropy
special issue "Entropy in Quantum Gravity and Quantum Cosmology" | Entropy 2015, 17, 6893-6924 | 10.3390/e17106893 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review some features of BEC models of black holes obtained by means of the
HWF formalism. We consider the KG equation for a toy graviton field coupled to
a static matter current in spherical symmetry. The classical field reproduces
the Newtonian potential generated by the matter source, while the corresponding
qua... | [
{
"created": "Wed, 4 Nov 2015 10:46:00 GMT",
"version": "v1"
}
] | 2015-11-05 | [
[
"Casadio",
"Roberto",
""
],
[
"Giugno",
"Andrea",
""
],
[
"Micu",
"Octavian",
""
],
[
"Orlandi",
"Alessio",
""
]
] | We review some features of BEC models of black holes obtained by means of the HWF formalism. We consider the KG equation for a toy graviton field coupled to a static matter current in spherical symmetry. The classical field reproduces the Newtonian potential generated by the matter source, while the corresponding quant... |
1807.02216 | Sumanta Chakraborty | Sajal Mukherjee, Sumanta Chakraborty and Naresh Dadhich | On some novel features of the Kerr-Newman-NUT Spacetime | Revised version, 37 pages, 10 figures, 1 table | Eur. Phys. J. C 79, 161 (2019) | 10.1140/epjc/s10052-019-6662-2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we have presented a special class of Kerr-Newman-NUT black hole,
having its horizon located precisely at $r=2M$, for $Q^{2}=l^{2}-a^{2}$, where
$M$, $l$, $a$ and $Q$ are respectively mass, NUT, rotation and electric charge
parameters of the black hole. Clearly this choice radically alters the causal
stru... | [
{
"created": "Fri, 6 Jul 2018 01:34:08 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Mar 2019 06:21:00 GMT",
"version": "v2"
}
] | 2019-03-05 | [
[
"Mukherjee",
"Sajal",
""
],
[
"Chakraborty",
"Sumanta",
""
],
[
"Dadhich",
"Naresh",
""
]
] | In this work we have presented a special class of Kerr-Newman-NUT black hole, having its horizon located precisely at $r=2M$, for $Q^{2}=l^{2}-a^{2}$, where $M$, $l$, $a$ and $Q$ are respectively mass, NUT, rotation and electric charge parameters of the black hole. Clearly this choice radically alters the causal struct... |
1402.5880 | Antonino Marciano | Stephon Alexander, Cosimo Bambi, Antonino Marciano and Leonardo
Modesto | Fermi-bounce Cosmology and scale invariant power-spectrum | 8 pages, 1 figure. v2: refereed version | Phys. Rev. D 90, 123510 (2014) | 10.1103/PhysRevD.90.123510 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a non-singular bouncing cosmology using a non-trivial coupling of
general relativity to fermionic fields. The usual Big Bang singularity is
avoided thanks to a negative energy density contribution from the fermions. Our
theory is ghost-free since the fermionic operator that generates the bounce is
equivale... | [
{
"created": "Mon, 24 Feb 2014 16:35:56 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Nov 2014 07:29:52 GMT",
"version": "v2"
}
] | 2014-12-10 | [
[
"Alexander",
"Stephon",
""
],
[
"Bambi",
"Cosimo",
""
],
[
"Marciano",
"Antonino",
""
],
[
"Modesto",
"Leonardo",
""
]
] | We develop a non-singular bouncing cosmology using a non-trivial coupling of general relativity to fermionic fields. The usual Big Bang singularity is avoided thanks to a negative energy density contribution from the fermions. Our theory is ghost-free since the fermionic operator that generates the bounce is equivalent... |
2204.03049 | R. R. Cuzinatto | R. R. Cuzinatto, M. de Montigny, P. J. Pompeia | Non-commutativity and non-inertial effects on a scalar field in a cosmic
string space-time. Part 2: Spin-zero Duffin-Kemmer-Petiau-like oscillator | 20 pages, 4 figures, 2 tables | Class. Quantum Grav. 39 (2022) 075007 | 10.1088/1361-6382/ac51bc | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the non-inertial effects of a rotating frame on a spin-zero,
Duffin-Kemmer-Petiau (DKP)-like oscillator in a cosmic string space-time with
non-commutative geometry in the momentum space. The spin-zero DKP-like
oscillator is obtained from the Klein-Gordon Lagrangian with a non-standard
prescription for the os... | [
{
"created": "Wed, 6 Apr 2022 19:20:48 GMT",
"version": "v1"
}
] | 2022-04-08 | [
[
"Cuzinatto",
"R. R.",
""
],
[
"de Montigny",
"M.",
""
],
[
"Pompeia",
"P. J.",
""
]
] | We study the non-inertial effects of a rotating frame on a spin-zero, Duffin-Kemmer-Petiau (DKP)-like oscillator in a cosmic string space-time with non-commutative geometry in the momentum space. The spin-zero DKP-like oscillator is obtained from the Klein-Gordon Lagrangian with a non-standard prescription for the osci... |
2108.05108 | Isaac Chun Fung Wong | Isaac C. F. Wong, Tjonnie G. F. Li | Signal Space in the Triangular Network of Einstein Telescope | 9 pages | null | 10.1103/PhysRevD.105.084002 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The proposed third-generation gravitational-wave detectors Einstein Telescope
will have a triangular design that consists of three colocated interferometers.
Summing the strain outputs from the three interferometers will cancel any
gravitational-wave signal and the resultant signal-free stream is known as null
stream... | [
{
"created": "Wed, 11 Aug 2021 09:18:39 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Aug 2021 03:21:02 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Aug 2021 09:02:02 GMT",
"version": "v3"
}
] | 2022-04-20 | [
[
"Wong",
"Isaac C. F.",
""
],
[
"Li",
"Tjonnie G. F.",
""
]
] | The proposed third-generation gravitational-wave detectors Einstein Telescope will have a triangular design that consists of three colocated interferometers. Summing the strain outputs from the three interferometers will cancel any gravitational-wave signal and the resultant signal-free stream is known as null stream. ... |
2402.08040 | Amir Hadi Ziaie | A. H. Ziaie, H. Shabani, H. Moradpour | Gravitational Collapse without Singularity Formation in Brans-Dicke
Theory | 20 pages, 7 figures | Eur. Phys. J. Plus 139, 148 (2024) | 10.1140/epjp/s13360-024-04904-x | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the present work we study collapse process of a homogeneous and isotropic
fluid in Brans-Dicke ({BD}) theory with non-vanishing spacetime torsion. In
this theory, torsion can be generated by the {BD} scalar field as well as the
intrinsic angular momentum (spin) of matter. Assuming the matter content of the
collaps... | [
{
"created": "Mon, 12 Feb 2024 20:14:18 GMT",
"version": "v1"
}
] | 2024-02-14 | [
[
"Ziaie",
"A. H.",
""
],
[
"Shabani",
"H.",
""
],
[
"Moradpour",
"H.",
""
]
] | In the present work we study collapse process of a homogeneous and isotropic fluid in Brans-Dicke ({BD}) theory with non-vanishing spacetime torsion. In this theory, torsion can be generated by the {BD} scalar field as well as the intrinsic angular momentum (spin) of matter. Assuming the matter content of the collapsin... |
1405.6788 | Narayan Banerjee | Ankan Mukherjee and Narayan Banerjee | Acceleration of the Universe in f(R) Gravity Models | 6 pages; 5 figures. To appear in Astrophysics and Space Science | null | 10.1007/s10509-014-1949-0 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general formalism for the investigation of the late time dynamics of the
universe for any analytic f(R) gravity model, along with a cold dark matter,
has been discussed in the present work. The formalism is then elucidated with
two examples. The values of the parameters of the models are chosen in such a
way that t... | [
{
"created": "Tue, 27 May 2014 05:14:51 GMT",
"version": "v1"
}
] | 2020-08-19 | [
[
"Mukherjee",
"Ankan",
""
],
[
"Banerjee",
"Narayan",
""
]
] | A general formalism for the investigation of the late time dynamics of the universe for any analytic f(R) gravity model, along with a cold dark matter, has been discussed in the present work. The formalism is then elucidated with two examples. The values of the parameters of the models are chosen in such a way that the... |
1306.3450 | Muhammad Zubair | M. Sharif, M. Zubair | Energy Conditions in $f(R,T,R_{\mu\nu}T^{\mu\nu})$ Gravity | 24 pages, no figure. typos corrected, three references added | JHEP 12(2013)079 | 10.1007/JHEP12(2013)079 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the validity of the energy conditions in a newly modified theory
named as $f(R,T,R_{\mu\nu}T^{\mu\nu})$ gravity, where $R$ and $T$ represent the
scalar curvature and trace of the energy-momentum tensor. The corresponding
energy conditions are derived which appear to be more general and can reduce to
the fa... | [
{
"created": "Thu, 13 Jun 2013 05:52:45 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jun 2013 11:19:04 GMT",
"version": "v2"
}
] | 2014-02-20 | [
[
"Sharif",
"M.",
""
],
[
"Zubair",
"M.",
""
]
] | We discuss the validity of the energy conditions in a newly modified theory named as $f(R,T,R_{\mu\nu}T^{\mu\nu})$ gravity, where $R$ and $T$ represent the scalar curvature and trace of the energy-momentum tensor. The corresponding energy conditions are derived which appear to be more general and can reduce to the fami... |
gr-qc/0212008 | Gianluca Cruciani | Donato Bini, Gianluca Cruciani and Andrea Lunari | Test particle motion in a gravitational plane wave collision background | 11 pages, 6 Postscript figures | Class.Quant.Grav. 20 (2003) 341-350 | 10.1088/0264-9381/20/2/307 | null | gr-qc | null | Test particle geodesic motion is analysed in detail for the background
spacetimes of the degenerate Ferrari-Ibanez colliding gravitational wave
solutions. Killing vectors have been used to reduce the equations of motion to
a first order system of differential equations which have been integrated
numerically. The asso... | [
{
"created": "Mon, 2 Dec 2002 10:25:41 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Dec 2002 11:48:51 GMT",
"version": "v2"
},
{
"created": "Thu, 19 Dec 2002 22:14:56 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Bini",
"Donato",
""
],
[
"Cruciani",
"Gianluca",
""
],
[
"Lunari",
"Andrea",
""
]
] | Test particle geodesic motion is analysed in detail for the background spacetimes of the degenerate Ferrari-Ibanez colliding gravitational wave solutions. Killing vectors have been used to reduce the equations of motion to a first order system of differential equations which have been integrated numerically. The associ... |
1204.2585 | Nicolas Yunes | Katerina Chatziioannou, Nicolas Yunes and Neil Cornish | Model-Independent Test of General Relativity: An Extended
post-Einsteinian Framework with Complete Polarization Content | 20 pages, 1 figure, added erratum correcting some intermediate
equations | null | 10.1103/PhysRevD.86.022004 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a model-independent test of General Relativity that allows for the
constraint of the gravitational wave (GW) polarization content with GW
detections of binary compact object inspirals. We first consider three modified
gravity theories (Brans-Dicke theory, Rosen's theory and Lightman-Lee theory)
and calcula... | [
{
"created": "Wed, 11 Apr 2012 22:21:59 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Aug 2012 00:51:46 GMT",
"version": "v2"
},
{
"created": "Fri, 12 May 2017 19:50:24 GMT",
"version": "v3"
}
] | 2017-05-16 | [
[
"Chatziioannou",
"Katerina",
""
],
[
"Yunes",
"Nicolas",
""
],
[
"Cornish",
"Neil",
""
]
] | We develop a model-independent test of General Relativity that allows for the constraint of the gravitational wave (GW) polarization content with GW detections of binary compact object inspirals. We first consider three modified gravity theories (Brans-Dicke theory, Rosen's theory and Lightman-Lee theory) and calculate... |
1106.2292 | Bibhas Majhi Ranjan | Bibhas Ranjan Majhi, Elias C. Vagenas | Black hole spectroscopy via adiabatic invariance | v1: 6 pages, LaTeX, no figures, to appear in Phys. Lett. B; v2: minor
changes to match published version | Phys.Lett.B701: 623-625, 2011 | 10.1016/j.physletb.2011.06.025 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | During the last years, one had to combine the proposal about how quasinormal
frequencies are related with black holes and the proposal about the adiabatic
invariance of black holes in order to derive the quantized entropy spectrum and
its minimum change for several black holes. In this letter we exclusively
utilize t... | [
{
"created": "Sun, 12 Jun 2011 08:52:37 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Jul 2011 05:10:54 GMT",
"version": "v2"
}
] | 2011-07-13 | [
[
"Majhi",
"Bibhas Ranjan",
""
],
[
"Vagenas",
"Elias C.",
""
]
] | During the last years, one had to combine the proposal about how quasinormal frequencies are related with black holes and the proposal about the adiabatic invariance of black holes in order to derive the quantized entropy spectrum and its minimum change for several black holes. In this letter we exclusively utilize the... |
1012.1982 | Francesco Cianfrani dr | Francesco Cianfrani | The kinematical Hilbert space of Loop Quantum Gravity from BF theories | 13 pages | Class. Quantum Grav. 28 (2011) 175014 | 10.1088/0264-9381/28/17/175014 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, it is demonstrated how the kinematical Hilbert space of Loop
Quantum Gravity (LQG) can be inferred from the configuration space of BF
theories via the imposition of the Hamiltonian constraints. In particular, it
is outlined how the projection to the representations associated with
Ashtekar-Barbero conne... | [
{
"created": "Thu, 9 Dec 2010 11:48:44 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Jul 2011 15:53:31 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Aug 2011 14:55:05 GMT",
"version": "v3"
}
] | 2015-05-20 | [
[
"Cianfrani",
"Francesco",
""
]
] | In this work, it is demonstrated how the kinematical Hilbert space of Loop Quantum Gravity (LQG) can be inferred from the configuration space of BF theories via the imposition of the Hamiltonian constraints. In particular, it is outlined how the projection to the representations associated with Ashtekar-Barbero connect... |
1602.08282 | Andrea Geralico | Donato Bini, Thibault Damour, Andrea Geralico | High post-Newtonian order gravitational self-force analytical results
for eccentric orbits around a Kerr black hole | 11 pages, revtex macros | Phys. Rev. D 93, 124058 (2016) | 10.1103/PhysRevD.93.124058 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first analytic computation of the Detweiler-Barack-Sago
gauge-invariant redshift function for a small mass in {\it eccentric} orbit
around a {\it spinning} black hole. Our results give the redshift contributions
that mix eccentricity and spin effects, through second order in eccentricity,
second order ... | [
{
"created": "Fri, 26 Feb 2016 11:34:58 GMT",
"version": "v1"
}
] | 2016-06-29 | [
[
"Bini",
"Donato",
""
],
[
"Damour",
"Thibault",
""
],
[
"Geralico",
"Andrea",
""
]
] | We present the first analytic computation of the Detweiler-Barack-Sago gauge-invariant redshift function for a small mass in {\it eccentric} orbit around a {\it spinning} black hole. Our results give the redshift contributions that mix eccentricity and spin effects, through second order in eccentricity, second order in... |
1904.07730 | Angelo E. S. Hartmann | M. Novello and A. E. S. Hartmann | The cosmological constant and a scalar field coupled non minimally to
gravity | 9 pages | null | 10.1007/s10773-019-04240-2 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | We show that the combined minimal and non minimal interaction with the
gravitational field may produce the generation of a cosmological constant
without self-interaction of the scalar field. In the same vein we analyze the
existence of states of a scalar field that by a combined interaction of minimal
and non minimal... | [
{
"created": "Mon, 15 Apr 2019 13:03:19 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Aug 2019 17:46:32 GMT",
"version": "v2"
}
] | 2020-01-29 | [
[
"Novello",
"M.",
""
],
[
"Hartmann",
"A. E. S.",
""
]
] | We show that the combined minimal and non minimal interaction with the gravitational field may produce the generation of a cosmological constant without self-interaction of the scalar field. In the same vein we analyze the existence of states of a scalar field that by a combined interaction of minimal and non minimal c... |
2309.07203 | Tom Banks | T. Banks (NHETC and Dept. of Physics and Astronomy, Rutgers
University) | On the Impossibility of Precise Verification of Models of Quantum
Gravity | LaTeX, 9 pages, 1 Figure | null | null | RUNHETC-2023-39 | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | We argue that no theoretical model of quantum gravity in a causal diamond
whose boundary has finite maximal area, can be verified with arbitrary
precision by experiments done in that diamond. This shows in particular that if
our own universe remains in an asymptotically future de Sitter state for a time
long enough f... | [
{
"created": "Wed, 13 Sep 2023 17:29:03 GMT",
"version": "v1"
}
] | 2023-09-15 | [
[
"Banks",
"T.",
"",
"NHETC and Dept. of Physics and Astronomy, Rutgers\n University"
]
] | We argue that no theoretical model of quantum gravity in a causal diamond whose boundary has finite maximal area, can be verified with arbitrary precision by experiments done in that diamond. This shows in particular that if our own universe remains in an asymptotically future de Sitter state for a time long enough for... |
2107.00141 | Michael Ross P | Michael P. Ross, Timesh Mistry, Laurence Datrier, Jeff Kissel, Krishna
Venkateswara, Colin Weller, Kavic Kumar, Charlie Hagedorn, Eric Adelberger,
John Lee, Erik Shaw, Patrick Thomas, David Barker, Filiberto Clara, Bubba
Gateley, Tyler M. Guidry, Ed Daw, Martin Hendry, Jens Gundlach | Initial Results from the LIGO Newtonian Calibrator | null | null | null | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The precise calibration of the strain readout of the LIGO gravitational wave
observatories is paramount to the accurate interpretation of gravitational wave
events. This calibration is traditionally done by imparting a known force on
the test masses of the observatory via radiation pressure. Here we describe the
impl... | [
{
"created": "Wed, 30 Jun 2021 22:55:56 GMT",
"version": "v1"
}
] | 2021-07-02 | [
[
"Ross",
"Michael P.",
""
],
[
"Mistry",
"Timesh",
""
],
[
"Datrier",
"Laurence",
""
],
[
"Kissel",
"Jeff",
""
],
[
"Venkateswara",
"Krishna",
""
],
[
"Weller",
"Colin",
""
],
[
"Kumar",
"Kavic",
""
],
[... | The precise calibration of the strain readout of the LIGO gravitational wave observatories is paramount to the accurate interpretation of gravitational wave events. This calibration is traditionally done by imparting a known force on the test masses of the observatory via radiation pressure. Here we describe the implem... |
1804.10979 | Krzysztof Andrzejewski | K. Andrzejewski, S. Prencel | Memory effect, conformal symmetry and gravitational plane waves | editorial corrections, references added, 19 pages | Phys. Lett. B 782 (2018) 421 | 10.1016/j.physletb.2018.05.072 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss in some detail the interaction of classical particles, including
the scattering and memory effect, with a pulse of gravitational plane wave. The
key point is the conformal symmetry of gravitational plane waves. In
particular, we obtain, in the limit of short pulse, some results for impulsive
gravitational ... | [
{
"created": "Sun, 29 Apr 2018 19:25:53 GMT",
"version": "v1"
},
{
"created": "Wed, 16 May 2018 21:26:45 GMT",
"version": "v2"
}
] | 2018-06-26 | [
[
"Andrzejewski",
"K.",
""
],
[
"Prencel",
"S.",
""
]
] | We discuss in some detail the interaction of classical particles, including the scattering and memory effect, with a pulse of gravitational plane wave. The key point is the conformal symmetry of gravitational plane waves. In particular, we obtain, in the limit of short pulse, some results for impulsive gravitational wa... |
1601.05500 | Jie-Xiong Mo | Jie-Xiong Mo, Gu-Qiang Li, Xiao-Bao Xu | Effects of power-law Maxwell field on the Van der Waals like phase
transition of higher dimensional dilaton black holes | revised version | Phys. Rev. D 93, 084041 (2016) | 10.1103/PhysRevD.93.084041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effects of power-law Maxwell field on the Van der Waals like phase
transition of higher-dimensional dilaton black holes are probed in detail. It
is shown that the Smarr relation gains corrections due to the effects of both
the power-law Maxwell field and the dilaton field while thermodynamic volume is
exactly the... | [
{
"created": "Thu, 21 Jan 2016 03:25:14 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Jan 2016 09:24:02 GMT",
"version": "v2"
},
{
"created": "Fri, 22 Apr 2016 01:07:56 GMT",
"version": "v3"
}
] | 2016-04-27 | [
[
"Mo",
"Jie-Xiong",
""
],
[
"Li",
"Gu-Qiang",
""
],
[
"Xu",
"Xiao-Bao",
""
]
] | The effects of power-law Maxwell field on the Van der Waals like phase transition of higher-dimensional dilaton black holes are probed in detail. It is shown that the Smarr relation gains corrections due to the effects of both the power-law Maxwell field and the dilaton field while thermodynamic volume is exactly the s... |
gr-qc/0303021 | Shrirang S. Deshingkar | Nigel T. Bishop and Shrirang S. Deshingkar | New approach to calculating the News | Some additions and minor changes in presentation. Accepted for
publication in PRD | Phys.Rev.D68:024031,2003 | 10.1103/PhysRevD.68.024031 | null | gr-qc | null | We consider the problem of finding the gravitational radiation output, or
news, within the context of a numerical simulation of a spacetime by means of
the null-cone, or characteristic, approach to numerical relativity. We develop
a method for computing the news that uses an explicit coordinate transformation
to a co... | [
{
"created": "Wed, 5 Mar 2003 12:21:23 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Jun 2003 16:05:57 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Bishop",
"Nigel T.",
""
],
[
"Deshingkar",
"Shrirang S.",
""
]
] | We consider the problem of finding the gravitational radiation output, or news, within the context of a numerical simulation of a spacetime by means of the null-cone, or characteristic, approach to numerical relativity. We develop a method for computing the news that uses an explicit coordinate transformation to a coor... |
2009.00115 | Willians Barreto | M. A. Alcoforado, W. O. Barreto, H. P. de Oliveira | Multidomain Galerkin-Collocation method: characteristic spherical
collapse of scalar fields | 22 pages, 8 figures; updated version to appear in Gen. Rel. Grav | GRG 53, 42 (2021) | 10.1007/s10714-021-02815-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We initiate a systematic implementation of the spectral domain decomposition
technique with the Galerkin-Collocation (GC) method in situations of interest
such as the spherical collapse of a scalar field in the characteristic
formulation. We discuss the transmission conditions at the interface of
contiguous subdomain... | [
{
"created": "Mon, 31 Aug 2020 21:32:43 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Apr 2021 19:00:12 GMT",
"version": "v2"
}
] | 2021-04-28 | [
[
"Alcoforado",
"M. A.",
""
],
[
"Barreto",
"W. O.",
""
],
[
"de Oliveira",
"H. P.",
""
]
] | We initiate a systematic implementation of the spectral domain decomposition technique with the Galerkin-Collocation (GC) method in situations of interest such as the spherical collapse of a scalar field in the characteristic formulation. We discuss the transmission conditions at the interface of contiguous subdomains ... |
2406.02026 | Phongpichit Channuie | Gaurav N. Gadbail, Simran Arora, Phongpichit Channuie, P.K. Sahoo | Cosmological dynamics of interacting dark energy and dark matter in
$f(Q)$ gravity | v1: 14 pages, many figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work, we explore the behavior of interacting dark energy and dark
matter within a model of $f(Q)$ gravity, employing a standard framework of
dynamical system analysis. We consider the power-law $f(Q)$ model incorporating
with two different forms of interacting dark energy and dark matter: $3\alpha
H\rho_m$ an... | [
{
"created": "Tue, 4 Jun 2024 07:05:28 GMT",
"version": "v1"
}
] | 2024-06-05 | [
[
"Gadbail",
"Gaurav N.",
""
],
[
"Arora",
"Simran",
""
],
[
"Channuie",
"Phongpichit",
""
],
[
"Sahoo",
"P. K.",
""
]
] | In this work, we explore the behavior of interacting dark energy and dark matter within a model of $f(Q)$ gravity, employing a standard framework of dynamical system analysis. We consider the power-law $f(Q)$ model incorporating with two different forms of interacting dark energy and dark matter: $3\alpha H\rho_m$ and ... |
gr-qc/0502010 | Jiliang Jing | Jiliang Jing | Quasinormal modes of Dirac field perturbation in Schwarzschild-anti-de
Sitter black hole | 16 pages, 6 figures | null | null | null | gr-qc astro-ph hep-th | null | The quasinormal modes (QNMs) associated with the decay of Dirac field
perturbation around a Schwarzschild-anti-de Sitter (SAdS) black hole is
investigated by using Horowitz-Hubeny approach. We find that both the real and
the imaginary parts of the fundamental quasinormal frequencies for large black
holes are linear f... | [
{
"created": "Thu, 3 Feb 2005 03:24:01 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Jing",
"Jiliang",
""
]
] | The quasinormal modes (QNMs) associated with the decay of Dirac field perturbation around a Schwarzschild-anti-de Sitter (SAdS) black hole is investigated by using Horowitz-Hubeny approach. We find that both the real and the imaginary parts of the fundamental quasinormal frequencies for large black holes are linear fun... |
1111.5474 | Alexey Krugly | Alexey L. Krugly and Ivan V. Stepanian | An example of the stochastic dynamics of a causal set | 7 pages, 5 figures, work presented at the conference "Foundations of
Probability and Physics-6" (FPP6) held on 12-15 June 2011 at the Linnaeus
University, V\"axj\"o, Sweden | null | 10.1063/1.3688972 | AIP Conference Proceedings, V. 1424, edited by Mauro D'Ariano,
Shao-Ming Fei, Emmanuel Haven, Beatrix Hiesmayr, Gregg Jaeger, Andrei
Khrennikov, and Jan-{\AA}ke Larsson, (2012), pp. 206 -210 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An example of a discrete pregeometry on a microscopic scale is introduced.
The model is a directed dyadic acyclic graph. This is the particular case of a
causal set. The particles in this model must be self-organized repetitive
structures. The dynamics of this model is a stochastic sequential growth
dynamics. New ver... | [
{
"created": "Wed, 23 Nov 2011 12:22:35 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Krugly",
"Alexey L.",
""
],
[
"Stepanian",
"Ivan V.",
""
]
] | An example of a discrete pregeometry on a microscopic scale is introduced. The model is a directed dyadic acyclic graph. This is the particular case of a causal set. The particles in this model must be self-organized repetitive structures. The dynamics of this model is a stochastic sequential growth dynamics. New verte... |
0810.5727 | K G Arun | K G Arun, Chandra Kant Mishra, Chris Van Den Broeck, B R Iyer, B S
Sathyaprakash, Siddhartha Sinha | LISA as a dark energy probe | 11pages, 1 Table, minor changes in text, accepted for publication in
Classical and Quantum Gravity (special issue for proceedings of 7th LISA
symposium) | Class.Quant.Grav.26:094021,2009 | 10.1088/0264-9381/26/9/094021 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently it was shown that the inclusion of higher signal harmonics in the
inspiral signals of binary supermassive black holes (SMBH) leads to dramatic
improvements in parameter estimation with the Laser Interferometer Space
Antenna (LISA). In particular, the angular resolution becomes good enough to
identify the hos... | [
{
"created": "Fri, 31 Oct 2008 16:17:43 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Apr 2009 22:21:07 GMT",
"version": "v2"
}
] | 2010-04-15 | [
[
"Arun",
"K G",
""
],
[
"Mishra",
"Chandra Kant",
""
],
[
"Broeck",
"Chris Van Den",
""
],
[
"Iyer",
"B R",
""
],
[
"Sathyaprakash",
"B S",
""
],
[
"Sinha",
"Siddhartha",
""
]
] | Recently it was shown that the inclusion of higher signal harmonics in the inspiral signals of binary supermassive black holes (SMBH) leads to dramatic improvements in parameter estimation with the Laser Interferometer Space Antenna (LISA). In particular, the angular resolution becomes good enough to identify the host ... |
1112.5397 | Ramin G. Daghigh | Ramin G. Daghigh and Michael D. Green | Validity of the WKB Approximation in Calculating the Asymptotic
Quasinormal Modes of Black Holes | 10 pages | null | 10.1103/PhysRevD.85.127501 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we categorize non-rotating black hole spacetimes based on
their pole structure and in each of these categories we determine whether the
WKB approximation is a valid approximation for calculating the asymptotic
quasinormal modes. We show that Schwarzschild black holes with the Gauss-Bonnet
correction be... | [
{
"created": "Thu, 22 Dec 2011 17:45:19 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Daghigh",
"Ramin G.",
""
],
[
"Green",
"Michael D.",
""
]
] | In this paper, we categorize non-rotating black hole spacetimes based on their pole structure and in each of these categories we determine whether the WKB approximation is a valid approximation for calculating the asymptotic quasinormal modes. We show that Schwarzschild black holes with the Gauss-Bonnet correction belo... |
1512.01566 | Cole Walsh | Andrey A. Shoom, Cole Walsh, Ivan Booth | Geodesic motion around a distorted static black hole | 12 pages and 12 figures | Phys. Rev. D 93, 064019 (2016) | 10.1103/PhysRevD.93.064019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study geodesic motion around a distorted Schwarzschild black
hole. We consider both timelike and null geodesics which are confined to the
black hole's equatorial plane. Such geodesics generically exist if the
distortion field has only even interior multipole moments and so the field is
symmetric with... | [
{
"created": "Fri, 4 Dec 2015 21:15:04 GMT",
"version": "v1"
}
] | 2016-03-23 | [
[
"Shoom",
"Andrey A.",
""
],
[
"Walsh",
"Cole",
""
],
[
"Booth",
"Ivan",
""
]
] | In this paper we study geodesic motion around a distorted Schwarzschild black hole. We consider both timelike and null geodesics which are confined to the black hole's equatorial plane. Such geodesics generically exist if the distortion field has only even interior multipole moments and so the field is symmetric with r... |
1705.10381 | Hristu Culetu | Hristu Culetu | Thin shell embedded in de Sitter space | 6 pages, no figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The behaviour of a static thin shell embedded in dS space is investigated. To
satisfy the junction conditions at the boundary, one rescales the time
variable. The surface energy $\sigma$ on the shell is positive but its surface
tension $\tau$ is negative when $r << a$, where $a$ is the horizon radius. The
repulsive c... | [
{
"created": "Mon, 29 May 2017 20:21:42 GMT",
"version": "v1"
}
] | 2017-05-31 | [
[
"Culetu",
"Hristu",
""
]
] | The behaviour of a static thin shell embedded in dS space is investigated. To satisfy the junction conditions at the boundary, one rescales the time variable. The surface energy $\sigma$ on the shell is positive but its surface tension $\tau$ is negative when $r << a$, where $a$ is the horizon radius. The repulsive cha... |
gr-qc/9812028 | K. Srinivasan | K. Srinivasan and T. Padmanabhan | Particle production and complex path analysis | 26 pages, Latex file, one eps figure | Phys.Rev.D60:024007,1999 | 10.1103/PhysRevD.60.024007 | IUCAA-44/98 | gr-qc hep-th | null | This paper discusses particle production in Schwarzchild-like spacetimes and
in an uniform electric field. Both problems are approached using the method of
complex path analysis. Particle production in Schwarzchild-like spacetimes with
a horizon is obtained here by a new and simple semi-classical method based on
the ... | [
{
"created": "Tue, 8 Dec 1998 13:11:38 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Srinivasan",
"K.",
""
],
[
"Padmanabhan",
"T.",
""
]
] | This paper discusses particle production in Schwarzchild-like spacetimes and in an uniform electric field. Both problems are approached using the method of complex path analysis. Particle production in Schwarzchild-like spacetimes with a horizon is obtained here by a new and simple semi-classical method based on the me... |
2210.09726 | Amarkumar Agrawal | A.S. Agrawal, S. Mishra, S.K. Tripathy, and B. Mishra | Bouncing cosmological models in a functional form of F(R) gravity | accepted in Grav. Cosm | Gravitation and Cosmology, 29, 294-304, (2023) | 10.1134/S0202289323030027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have investigated some bouncing cosmological models in an isotropic and
homogeneous space time with the F(R) theory of gravity. Two functional forms of
F(R) have been investigated with a bouncing scale factor. The dynamical
parameters are derived and analysed along with the cosmographic parameters. The
analysis in... | [
{
"created": "Tue, 18 Oct 2022 10:12:43 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Apr 2023 05:42:00 GMT",
"version": "v2"
}
] | 2024-03-21 | [
[
"Agrawal",
"A. S.",
""
],
[
"Mishra",
"S.",
""
],
[
"Tripathy",
"S. K.",
""
],
[
"Mishra",
"B.",
""
]
] | We have investigated some bouncing cosmological models in an isotropic and homogeneous space time with the F(R) theory of gravity. Two functional forms of F(R) have been investigated with a bouncing scale factor. The dynamical parameters are derived and analysed along with the cosmographic parameters. The analysis in b... |
1101.2566 | Luca Fabbri | Luca Fabbri | Conformal Gravity with the most general ELKO Matter | 5 pages | Phys.Rev.D85:047502,2012 | 10.1103/PhysRevD.85.047502 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently we have constructed the conformal gravity with metric and torsion,
finding the gravitational field equations that give the conservation laws and
trace condition; in the present paper we apply this theory to the case of ELKO
matter field, proving that their spin and energy densities once the matter
field equa... | [
{
"created": "Thu, 13 Jan 2011 14:00:10 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Apr 2011 19:31:01 GMT",
"version": "v2"
},
{
"created": "Tue, 21 Feb 2012 20:14:40 GMT",
"version": "v3"
},
{
"created": "Thu, 10 Apr 2014 12:33:02 GMT",
"version": "v4"
}
] | 2014-04-11 | [
[
"Fabbri",
"Luca",
""
]
] | Recently we have constructed the conformal gravity with metric and torsion, finding the gravitational field equations that give the conservation laws and trace condition; in the present paper we apply this theory to the case of ELKO matter field, proving that their spin and energy densities once the matter field equati... |
2407.15123 | Vicharit Yingcharoenrat | Shinji Mukohyama, Emeric Seraille, Kazufumi Takahashi, Vicharit
Yingcharoenrat | Bridging Dark Energy and Black Holes with EFT: Frame Transformation and
Gravitational Wave Speed | 27 pages | null | null | YITP-24-86, IPMU24-0030 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Typically, constraints on parameters of the effective field theory (EFT) of
dark energy have been obtained in the Jordan frame, where matter fields are
minimally coupled to gravity. To connect these constraints with those of the
EFT of black hole perturbations with a timelike scalar profile, it is necessary
to perfor... | [
{
"created": "Sun, 21 Jul 2024 11:23:03 GMT",
"version": "v1"
}
] | 2024-07-23 | [
[
"Mukohyama",
"Shinji",
""
],
[
"Seraille",
"Emeric",
""
],
[
"Takahashi",
"Kazufumi",
""
],
[
"Yingcharoenrat",
"Vicharit",
""
]
] | Typically, constraints on parameters of the effective field theory (EFT) of dark energy have been obtained in the Jordan frame, where matter fields are minimally coupled to gravity. To connect these constraints with those of the EFT of black hole perturbations with a timelike scalar profile, it is necessary to perform ... |
gr-qc/9905004 | Carey Carpenter Briggs | C. C. Briggs | General Expressions for Chern Forms Up to the 13th Order in Curvature | 4 pages | null | null | null | gr-qc | null | General expressions are given for Chern forms up to the 13th order in
curvature in terms of simple polynomial concomitants of the curvature 2-form
for n-dimensional differentiable manifolds having a general linear connection.
| [
{
"created": "Sat, 1 May 1999 23:32:09 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Briggs",
"C. C.",
""
]
] | General expressions are given for Chern forms up to the 13th order in curvature in terms of simple polynomial concomitants of the curvature 2-form for n-dimensional differentiable manifolds having a general linear connection. |
gr-qc/9905075 | Maria da Conceicao Bento | M.C. Bento and O. Bertolami | Compactification, Vacuum Energy and Quintessence | 15 pages, Latex, Third Award in 1999 Essay Competition of the Gravity
Research Foundation | Gen.Rel.Grav. 31 (1999) 1461-1472 | 10.1023/A:1026774102600 | null | gr-qc astro-ph hep-ph hep-th | null | We study the possibility that the vacuum energy density of scalar and
internal-space gauge fields arising from the process of dimensional reduction
of higher dimensional gravity theories plays the role of quintessence. We show
that, for the multidimensional Einstein-Yang-Mills system compactified on a $R
\times S^3 \... | [
{
"created": "Thu, 20 May 1999 11:40:48 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Bento",
"M. C.",
""
],
[
"Bertolami",
"O.",
""
]
] | We study the possibility that the vacuum energy density of scalar and internal-space gauge fields arising from the process of dimensional reduction of higher dimensional gravity theories plays the role of quintessence. We show that, for the multidimensional Einstein-Yang-Mills system compactified on a $R \times S^3 \ti... |
gr-qc/0508068 | Sergey G. Klimenko | S. Klimenko (1), S. Mohanty (2), M. Rakhmanov (1), G. Mitselmakher
(1). ((1) University of Florida, Gainesville, FL. (2) University of Texas at
Brownsville, TX.) | Constraint Likelihood analysis for a network of gravitational wave
detectors | 13 pages, 6 figures | Phys.Rev.D72:122002,2005 | 10.1103/PhysRevD.72.122002 | null | gr-qc | null | We propose a coherent method for the detection and reconstruction of
gravitational wave signals for a network of interferometric detectors. The
method is derived using the likelihood functional for unknown signal waveforms.
In the standard approach, the global maximum of the likelihood over the space
of waveforms is ... | [
{
"created": "Wed, 17 Aug 2005 03:27:03 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Aug 2005 00:18:55 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Klimenko",
"S.",
""
],
[
"Mohanty",
"S.",
""
],
[
"Rakhmanov",
"M.",
""
],
[
"Mitselmakher",
"G.",
""
],
[
".",
"",
""
]
] | We propose a coherent method for the detection and reconstruction of gravitational wave signals for a network of interferometric detectors. The method is derived using the likelihood functional for unknown signal waveforms. In the standard approach, the global maximum of the likelihood over the space of waveforms is us... |
gr-qc/9905083 | Mariusz Dabrowski | Mariusz P. Dabrowski | Is Supernovae Data in Favour of Isotropic Cosmologies? | 7 pages, no figures | Grav.Cosmol. 8 (2002) 190-192 | null | null | gr-qc astro-ph | null | Most of the observational claims in cosmology are based on the assumption
that the universe is isotropic and homogeneous so they essentially test
different types of Friedmann models. This also refers to recent observations of
supernovae Ia, which, within the framework of Friedmann cosmologies give strong
support to n... | [
{
"created": "Fri, 21 May 1999 07:17:37 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dabrowski",
"Mariusz P.",
""
]
] | Most of the observational claims in cosmology are based on the assumption that the universe is isotropic and homogeneous so they essentially test different types of Friedmann models. This also refers to recent observations of supernovae Ia, which, within the framework of Friedmann cosmologies give strong support to neg... |
0805.3475 | Farhad Darabi | K. Atazadeh, F. Darabi and H. R. Sepangi | Correspondence between modified gravity and 5D Ricci-flat cosmologies | 9 pages, 2 figures, Revised and accepted for publication in IJMPD | Int.J.Mod.Phys.D18:1049-1058,2009 | 10.1142/S0218271809014923 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the correspondence between two theoretical frameworks for describing
dark energy, $f(R)$ gravity and higher-dimensional Space-Time-Matter (STM) or
induced-matter theory. We show that the Hubble expansion parameter in $f(R)$
gravity can be associated with a combination of metric functions in STM theory,
and c... | [
{
"created": "Thu, 22 May 2008 14:51:30 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Dec 2008 09:00:41 GMT",
"version": "v2"
}
] | 2010-05-12 | [
[
"Atazadeh",
"K.",
""
],
[
"Darabi",
"F.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | We study the correspondence between two theoretical frameworks for describing dark energy, $f(R)$ gravity and higher-dimensional Space-Time-Matter (STM) or induced-matter theory. We show that the Hubble expansion parameter in $f(R)$ gravity can be associated with a combination of metric functions in STM theory, and con... |
gr-qc/9403049 | null | Arvind Borde | Open and Closed Universes, Initial Singularities and Inflation | 27 pages, Plain TeX (figures are embedded in the file itself and they
will emerge if it is processed according to the instructions at the top of
the file) | Phys.Rev. D50 (1994) 3692-3702 | 10.1103/PhysRevD.50.3692 | null | gr-qc | null | The existence of initial singularities in expanding universes is proved
without assuming the timelike convergence condition. The assumptions made in
the proof are ones likely to hold both in open universes and in many closed
ones. (It is further argued that at least some of the expanding closed
universes that do not ... | [
{
"created": "Mon, 28 Mar 1994 07:11:00 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Borde",
"Arvind",
""
]
] | The existence of initial singularities in expanding universes is proved without assuming the timelike convergence condition. The assumptions made in the proof are ones likely to hold both in open universes and in many closed ones. (It is further argued that at least some of the expanding closed universes that do not ob... |
1407.1666 | Sudipta Das | Sudipta Das, Abdulla Al Mamon | Cosmic acceleration in non-canonical scalar field model - An interacting
scenario | 18 pages, 10 figures; typos corrected, added more figures, matches
published version | Astrophys Space Sci (2014) 355 : 2168 | 10.1007/s10509-014-2168-4 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we have studied the dynamics of accelerating scenario within
the framework of scalar field models possessing a non-canonical kinetic term.
In this toy model, the scalar field is allowed to interact with the dark matter
component through a source term. We have assumed a specific form for the
coupling ter... | [
{
"created": "Mon, 7 Jul 2014 11:09:20 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Jul 2014 08:15:55 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Feb 2015 11:35:23 GMT",
"version": "v3"
}
] | 2015-06-22 | [
[
"Das",
"Sudipta",
""
],
[
"Mamon",
"Abdulla Al",
""
]
] | In this paper we have studied the dynamics of accelerating scenario within the framework of scalar field models possessing a non-canonical kinetic term. In this toy model, the scalar field is allowed to interact with the dark matter component through a source term. We have assumed a specific form for the coupling term ... |
1005.1410 | Jennie D'Ambroise | Jennie D'Ambroise | Generalized EMP and nonlinear Schrodinger-type reformulations of some
scalar field cosmological models | author's PhD thesis | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that Einstein's gravitational field equations for the
Friedmann-Robertson-Lema\^itre-Walker (FRLW) and for two conformal versions of
the Bianchi I and Bianchi V perfect fluid scalar field cosmological models, can
be equivalently reformulated in terms of a single equation of either
generalized Ermakov-Milne-Pi... | [
{
"created": "Sun, 9 May 2010 17:11:14 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"D'Ambroise",
"Jennie",
""
]
] | We show that Einstein's gravitational field equations for the Friedmann-Robertson-Lema\^itre-Walker (FRLW) and for two conformal versions of the Bianchi I and Bianchi V perfect fluid scalar field cosmological models, can be equivalently reformulated in terms of a single equation of either generalized Ermakov-Milne-Pinn... |
0812.1502 | Trevor Lipscombe | T.C. Lipscombe | Self-gravitating clouds of generalized Chaplygin and modified
anti-Chaplygin Gases | 16 pages | Phys.Scripta 03:035901,2011 | 10.1088/0031-8949/83/03/035901 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Chaplygin gas has been proposed as a possible dark energy, dark matter
candidate. As a working fluid in a Friedmann-Robertson-Walker universe, it
exhibits early behavior reminiscent of dark matter, but at later times is more
akin to a cosmological constant. In any such universe, however, one can expect
local pert... | [
{
"created": "Mon, 8 Dec 2008 15:10:58 GMT",
"version": "v1"
}
] | 2011-03-07 | [
[
"Lipscombe",
"T. C.",
""
]
] | The Chaplygin gas has been proposed as a possible dark energy, dark matter candidate. As a working fluid in a Friedmann-Robertson-Walker universe, it exhibits early behavior reminiscent of dark matter, but at later times is more akin to a cosmological constant. In any such universe, however, one can expect local pertur... |
1702.01028 | Shibesh Kumar Jas Pacif | S. K. J. Pacif, K. Myrzakulov and R. Myrzakulov | Cosmological parametrizations and their scalar field descendents | 11 pages, 0 fig | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reconstruct the field potentials in case of (non)phantom fields for
different models resulting from parametrization of q(t), a(t) or H(t). In
addition we carry out similar procedure for tachyonic field. We also discuss
specific form of parametrization for reconstruction of scalar field potential.
| [
{
"created": "Thu, 2 Feb 2017 09:50:21 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Feb 2017 07:52:13 GMT",
"version": "v2"
},
{
"created": "Thu, 16 Feb 2017 07:21:12 GMT",
"version": "v3"
}
] | 2017-02-17 | [
[
"Pacif",
"S. K. J.",
""
],
[
"Myrzakulov",
"K.",
""
],
[
"Myrzakulov",
"R.",
""
]
] | We reconstruct the field potentials in case of (non)phantom fields for different models resulting from parametrization of q(t), a(t) or H(t). In addition we carry out similar procedure for tachyonic field. We also discuss specific form of parametrization for reconstruction of scalar field potential. |
1301.1396 | Amitai Bin-Nun | Amitai Y. Bin-Nun | Method for detecting a boson star at Sgr A* through gravitational
lensing | 5 pages, 5 figures | null | null | null | gr-qc astro-ph.CO astro-ph.GA hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observations of the Sgr A* region in the galactic center confirm the presence
of a large amount of matter in a small volume, leading to the consensus that a
black hole exists there. However, dynamical observations cannot rule out the
presence of a boson star, a compact object made up of scalar particles, as both
obje... | [
{
"created": "Tue, 8 Jan 2013 02:33:01 GMT",
"version": "v1"
}
] | 2013-01-09 | [
[
"Bin-Nun",
"Amitai Y.",
""
]
] | Observations of the Sgr A* region in the galactic center confirm the presence of a large amount of matter in a small volume, leading to the consensus that a black hole exists there. However, dynamical observations cannot rule out the presence of a boson star, a compact object made up of scalar particles, as both object... |
gr-qc/0505151 | Janusz Garecki Dr. | Janusz Garecki | The averaged tensors of the relative energy-momentum and angular
momentum in general relativity | 15 pages, no figures, minor changes | null | null | null | gr-qc | null | There exist at least a few different kind of averaging of the differences of
the energy-momentum and angular momentum in normal coordinates {\bf NC(P)}
which give tensorial quantities. The obtained averaged quantities are
equivalent mathematically because they differ only by constant scalar
dimensional factors. One o... | [
{
"created": "Mon, 30 May 2005 13:03:42 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jul 2005 11:33:44 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Garecki",
"Janusz",
""
]
] | There exist at least a few different kind of averaging of the differences of the energy-momentum and angular momentum in normal coordinates {\bf NC(P)} which give tensorial quantities. The obtained averaged quantities are equivalent mathematically because they differ only by constant scalar dimensional factors. One of ... |
gr-qc/0612063 | Diego Cirilo-Lombardo | Diego Cirilo-Lombardo (BLTP) | The Newman-Janis Algorithm, Rotating Solutions and Einstein-Born-Infeld
Black Holes | null | Class.Quant.Grav.21:1407-1417,2004 | 10.1088/0264-9381/21/6/009 | null | gr-qc math-ph math.MP | null | A new metric is obtained by applying a complex coordinate trans- formation to
the static metric of the self-gravitating Born-Infeld monopole. The behaviour
of the new metric is typical of a rotating charged source, but this source is
not a spherically symmetric Born-Infeld monopole with rotation. We show that
the str... | [
{
"created": "Mon, 11 Dec 2006 12:44:29 GMT",
"version": "v1"
}
] | 2010-12-06 | [
[
"Cirilo-Lombardo",
"Diego",
"",
"BLTP"
]
] | A new metric is obtained by applying a complex coordinate trans- formation to the static metric of the self-gravitating Born-Infeld monopole. The behaviour of the new metric is typical of a rotating charged source, but this source is not a spherically symmetric Born-Infeld monopole with rotation. We show that the struc... |
2207.04677 | Alejandro Garc\'ia-Quismondo | Beatriz Elizaga Navascu\'es, Alejandro Garc\'ia-Quismondo, and
Guillermo A. Mena Marug\'an | Space of solutions of the Ashtekar-Olmedo-Singh effective black hole
model | 11 pages, accepted for publication in Physical Review D | Phys. Rev. D 106, 063516 (2022) | 10.1103/PhysRevD.106.063516 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a general choice of integration constants in the resolution of
the dynamical equations derived from a recently proposed effective model that
describes black hole spacetimes in the context of loop quantum cosmology. The
interest of our analysis is twofold. On the one hand, it allows for a study of
the enti... | [
{
"created": "Mon, 11 Jul 2022 07:44:17 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Sep 2022 13:32:52 GMT",
"version": "v2"
}
] | 2022-09-19 | [
[
"Navascués",
"Beatriz Elizaga",
""
],
[
"García-Quismondo",
"Alejandro",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
]
] | We consider a general choice of integration constants in the resolution of the dynamical equations derived from a recently proposed effective model that describes black hole spacetimes in the context of loop quantum cosmology. The interest of our analysis is twofold. On the one hand, it allows for a study of the entire... |
0905.1323 | M. V. van der Sluys | Marc van der Sluys, Ilya Mandel, Vivien Raymond, Vicky Kalogera,
Christian Roever, Nelson Christensen | Parameter estimation for signals from compact binary inspirals injected
into LIGO data | 11 pages, 3 figures, 3 tables. Conference proceedings for GWDAW-13,
submitted for publication in CQG | Class.Quant.Grav.26:204010,2009 | 10.1088/0264-9381/26/20/204010 | null | gr-qc astro-ph.CO physics.data-an | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | During the fifth science run of the Laser Interferometer Gravitational-wave
Observatory (LIGO), signals modelling the gravitational waves emitted by
coalescing non-spinning compact-object binaries were injected into the LIGO
data stream. We analysed the data segments into which such injections were made
using a Bayes... | [
{
"created": "Fri, 8 May 2009 19:53:52 GMT",
"version": "v1"
}
] | 2009-11-05 | [
[
"van der Sluys",
"Marc",
""
],
[
"Mandel",
"Ilya",
""
],
[
"Raymond",
"Vivien",
""
],
[
"Kalogera",
"Vicky",
""
],
[
"Roever",
"Christian",
""
],
[
"Christensen",
"Nelson",
""
]
] | During the fifth science run of the Laser Interferometer Gravitational-wave Observatory (LIGO), signals modelling the gravitational waves emitted by coalescing non-spinning compact-object binaries were injected into the LIGO data stream. We analysed the data segments into which such injections were made using a Bayesia... |
2203.12401 | Adam Cie\'slik | Adam Cie\'slik and Patryk Mach | Revisiting timelike and null geodesics in the Schwarzschild spacetime:
general expressions in terms of Weierstrass elliptic functions | Matches the version accepted by Classical and Quantum Gravity | null | 10.1088/1361-6382/ac95f2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The theory of Schwarzschild geodesics is revisited. Basing on a result by
Weierstrass and Biermann, we derive a formula describing all non radial,
timelike and null trajectories in terms of Weierstrass elliptic functions.
Quite remarkably, a single formula works for an entire geodesic trajectory,
even if it passes th... | [
{
"created": "Wed, 23 Mar 2022 13:23:31 GMT",
"version": "v1"
},
{
"created": "Sun, 27 Mar 2022 14:44:47 GMT",
"version": "v2"
},
{
"created": "Fri, 30 Sep 2022 17:10:51 GMT",
"version": "v3"
},
{
"created": "Mon, 3 Oct 2022 17:10:36 GMT",
"version": "v4"
}
] | 2022-10-04 | [
[
"Cieślik",
"Adam",
""
],
[
"Mach",
"Patryk",
""
]
] | The theory of Schwarzschild geodesics is revisited. Basing on a result by Weierstrass and Biermann, we derive a formula describing all non radial, timelike and null trajectories in terms of Weierstrass elliptic functions. Quite remarkably, a single formula works for an entire geodesic trajectory, even if it passes thro... |
gr-qc/0509109 | John T. Whelan | John T Whelan | Stochastic Gravitational Wave Measurements with Bar Detectors:
Dependence of Response on Detector Orientation | 17 pages, REVTeX (uses rcs, amsmath, hyperref, and graphicx style
files), 4 figures (8 eps image files) | Class.Quant.Grav. 23 (2006) 1181-1192 | 10.1088/0264-9381/23/4/007 | LIGO-P050041-01-Z | gr-qc | null | The response of a cross-correlation measurement to an isotropic stochastic
gravitational-wave background depends on the observing geometry via the overlap
reduction function. If one of the detectors being correlated is a resonant bar
whose orientation can be changed, the response to stochastic gravitational
waves can... | [
{
"created": "Tue, 27 Sep 2005 22:47:16 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Whelan",
"John T",
""
]
] | The response of a cross-correlation measurement to an isotropic stochastic gravitational-wave background depends on the observing geometry via the overlap reduction function. If one of the detectors being correlated is a resonant bar whose orientation can be changed, the response to stochastic gravitational waves can b... |
1408.4023 | Brian Dolan | Brian P. Dolan | Black holes and Boyle's law -- the thermodynamics of the cosmological
constant | Review article; 31 pages, 3 figures | null | 10.1142/S0217732315400027 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When the cosmological constant, $\Lambda$, is interpreted as a thermodynamic
variable in the study of black hole thermodynamics a very rich structure
emerges. It is natural to interpret $\Lambda$ as a pressure and define the
thermodynamically conjugate variable to be the thermodynamic volume of the
black hole (which ... | [
{
"created": "Mon, 18 Aug 2014 14:40:53 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Dolan",
"Brian P.",
""
]
] | When the cosmological constant, $\Lambda$, is interpreted as a thermodynamic variable in the study of black hole thermodynamics a very rich structure emerges. It is natural to interpret $\Lambda$ as a pressure and define the thermodynamically conjugate variable to be the thermodynamic volume of the black hole (which ne... |
gr-qc/0512075 | Farook Rahaman | F.Rahaman, M. Kalam, M. Sarker and K. Gayen | A theoretical construction of wormhole supported by Phantom Energy | 6 pages, One reference has been corrected | Phys.Lett. B633 (2006) 161-163 | 10.1016/j.physletb.2005.11.080 | null | gr-qc | null | A new solution has been presented for the spherically symmetric space time
describing wormholes with Phantom Energy. The model suggests that the existence
of wormhole is supported by arbitrarily small quantity of Phantom Energy.
| [
{
"created": "Tue, 13 Dec 2005 07:07:08 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Dec 2006 09:59:16 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Rahaman",
"F.",
""
],
[
"Kalam",
"M.",
""
],
[
"Sarker",
"M.",
""
],
[
"Gayen",
"K.",
""
]
] | A new solution has been presented for the spherically symmetric space time describing wormholes with Phantom Energy. The model suggests that the existence of wormhole is supported by arbitrarily small quantity of Phantom Energy. |
0709.3714 | Xin-Zhou Li | Ping Xi and Xin-Zhou Li | Quasinormal Modes and Late-Time Tails of Canonical Acoustic Black Holes | 5 pages, 6 figures | Int.J.Mod.Phys.D16:1211-1218,2007 | 10.1142/S0218271807010687 | null | gr-qc | null | In this paper, we investigate the evolution of classical wave propagation in
the canonical acoustic black hole by numerical method and discuss the details
of tail phenomenon. The oscillating frequency and damping time scale both
increase with the angular momentum $l$. For the lower $l$, numerical results
show the low... | [
{
"created": "Mon, 24 Sep 2007 09:03:18 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Xi",
"Ping",
""
],
[
"Li",
"Xin-Zhou",
""
]
] | In this paper, we investigate the evolution of classical wave propagation in the canonical acoustic black hole by numerical method and discuss the details of tail phenomenon. The oscillating frequency and damping time scale both increase with the angular momentum $l$. For the lower $l$, numerical results show the lowes... |
1904.09548 | Cong Li | Cong Li, Pengzhang He, Ping Li, Jian-Bo Deng | Joule-Thomson expansion of the Bardeen-AdS black holes | 14pages,3figures | null | 10.1007/s10714-020-02704-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Joule-Thomson expansion process is studied for Bardeen-AdS black holes in
the extended phase space. Firstly, we get Joule-Thomson coefficient and find
that the divergent point of Joule-Thomson coefficient coincides with the zero
point of temperature. The inversion curves are also obtained from the zero
point of J... | [
{
"created": "Sun, 21 Apr 2019 06:42:15 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jun 2019 07:14:04 GMT",
"version": "v2"
}
] | 2020-06-03 | [
[
"Li",
"Cong",
""
],
[
"He",
"Pengzhang",
""
],
[
"Li",
"Ping",
""
],
[
"Deng",
"Jian-Bo",
""
]
] | The Joule-Thomson expansion process is studied for Bardeen-AdS black holes in the extended phase space. Firstly, we get Joule-Thomson coefficient and find that the divergent point of Joule-Thomson coefficient coincides with the zero point of temperature. The inversion curves are also obtained from the zero point of Jou... |
gr-qc/9607073 | Adrian Kent | Adrian Kent (DAMTP, University of Cambridge) | Quantum Histories and Their Implications | To appear in ``Relativistic Quantum Measurement and Decoherence'', F.
Petruccione (ed.), Springer-Verlag | Lect.Notes Phys. 559 (2000) 93-115 | null | DAMTP/96-74 (revised) | gr-qc quant-ph | null | Classical mechanics and standard Copenhagen quantum mechanics respect
subspace implications. For example, if a particle is confined in a particular
region $R$ of space, then in these theories we can deduce that it is confined
in regions containing $R$. However, subspace implications are generally
violated by versions... | [
{
"created": "Tue, 30 Jul 1996 00:30:41 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Jul 1996 10:58:32 GMT",
"version": "v2"
},
{
"created": "Fri, 21 Mar 1997 18:15:44 GMT",
"version": "v3"
},
{
"created": "Tue, 23 May 2000 16:47:06 GMT",
"version": "v4"
}
] | 2008-02-03 | [
[
"Kent",
"Adrian",
"",
"DAMTP, University of Cambridge"
]
] | Classical mechanics and standard Copenhagen quantum mechanics respect subspace implications. For example, if a particle is confined in a particular region $R$ of space, then in these theories we can deduce that it is confined in regions containing $R$. However, subspace implications are generally violated by versions o... |
1104.1569 | Luciano Vanzo | Luciano Vanzo | On tunneling across horizons | Latex Document, 5 pages, 2 figures, title changed, abstract changed,
added references, results unchanged | Europhys.Lett.95:20001,2011 | 10.1209/0295-5075/95/20001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The tunneling method for stationary black holes in the Hamilton-Jacobi
variant is reconsidered in the light of various critiques that have been moved
against. It is shown that once the tunneling trajectories have been correctly
identified the method isfree from internal inconsistencies, it is manifestly
covariant, it... | [
{
"created": "Fri, 8 Apr 2011 13:19:00 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Apr 2011 09:47:20 GMT",
"version": "v2"
}
] | 2011-06-24 | [
[
"Vanzo",
"Luciano",
""
]
] | The tunneling method for stationary black holes in the Hamilton-Jacobi variant is reconsidered in the light of various critiques that have been moved against. It is shown that once the tunneling trajectories have been correctly identified the method isfree from internal inconsistencies, it is manifestly covariant, it a... |
gr-qc/9811077 | Nikolai V. Mitskievich | Nikolai V. Mitskievich (Universidad de Guadalajara, Mexico) | Modelling general relativistic perfect fluids in field theoretic
language | 23 pages, 0 figures (LaTeX) | Int.J.Theor.Phys. 38 (1999) 997-1016 | null | null | gr-qc | null | Skew-symmetric massless fields, their potentials being $r$-forms, are close
analogues of Maxwell's field (though the non-linear cases also should be
considered). We observe that only two of them ($r=$2 and 3) automatically yield
stress-energy tensors characteristic to normal perfect fluids. It is shown that
they natu... | [
{
"created": "Mon, 23 Nov 1998 04:27:08 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Mitskievich",
"Nikolai V.",
"",
"Universidad de Guadalajara, Mexico"
]
] | Skew-symmetric massless fields, their potentials being $r$-forms, are close analogues of Maxwell's field (though the non-linear cases also should be considered). We observe that only two of them ($r=$2 and 3) automatically yield stress-energy tensors characteristic to normal perfect fluids. It is shown that they natura... |
gr-qc/0208040 | Fernando P. Devecchi | G.M. Kremer and F.P. Devecchi | Irreversible Processes in Inflationary Cosmological Models | 13 pages, 2 figures, to appear in PRD | Phys.Rev. D66 (2002) 063503 | 10.1103/PhysRevD.66.063503 | null | gr-qc | null | By using the thermodynamic theory of irreversible processes and Einstein
general relativity, a cosmological model is proposed where the early universe
is considered as a mixture of a scalar field with a matter field. The scalar
field refers to the inflaton while the matter field to the classical particles.
The irreve... | [
{
"created": "Thu, 15 Aug 2002 21:11:31 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Kremer",
"G. M.",
""
],
[
"Devecchi",
"F. P.",
""
]
] | By using the thermodynamic theory of irreversible processes and Einstein general relativity, a cosmological model is proposed where the early universe is considered as a mixture of a scalar field with a matter field. The scalar field refers to the inflaton while the matter field to the classical particles. The irrevers... |
1512.05454 | Jiliang Jing | Xiongjun Fang, Minyong Guo, Jiliang Jing | General proof of the entropy principle for self-gravitating fluid in
f(R) Gravity | 18 pages. arXiv admin note: text overlap with arXiv:1404.6601 by
other authors | JHEP 08 (2016) 163 | 10.1007/JHEP08(2016)163 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The discussions on the connection between gravity and thermodynamics attract
much attention recently. We consider a static self-gravitating perfect fluid
system in $f(R)$ gravity, which is an important theory could explain the
accelerated expansion of the universe. We first show that the
Tolman-Oppenheimer-Volkoff eq... | [
{
"created": "Thu, 17 Dec 2015 03:26:18 GMT",
"version": "v1"
},
{
"created": "Fri, 27 May 2016 01:31:11 GMT",
"version": "v2"
}
] | 2016-10-03 | [
[
"Fang",
"Xiongjun",
""
],
[
"Guo",
"Minyong",
""
],
[
"Jing",
"Jiliang",
""
]
] | The discussions on the connection between gravity and thermodynamics attract much attention recently. We consider a static self-gravitating perfect fluid system in $f(R)$ gravity, which is an important theory could explain the accelerated expansion of the universe. We first show that the Tolman-Oppenheimer-Volkoff equa... |
gr-qc/0003031 | John Baker | J. Baker and M. Campanelli (AEI-Golm) | Making use of geometrical invariants in black hole collisions | 4 pages, 3 eps figures, Revtex | Phys.Rev. D62 (2000) 127501 | 10.1103/PhysRevD.62.127501 | AEI-2000-016 | gr-qc | null | We consider curvature invariants in the context of black hole collision
simulations. In particular, we propose a simple and elegant combination of the
Weyl invariants I and J, the {\sl speciality index} ${\cal S}$. In the context
of black hole perturbations $\cal S$ provides a measure of the size of the
distortions f... | [
{
"created": "Wed, 8 Mar 2000 16:15:15 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Baker",
"J.",
"",
"AEI-Golm"
],
[
"Campanelli",
"M.",
"",
"AEI-Golm"
]
] | We consider curvature invariants in the context of black hole collision simulations. In particular, we propose a simple and elegant combination of the Weyl invariants I and J, the {\sl speciality index} ${\cal S}$. In the context of black hole perturbations $\cal S$ provides a measure of the size of the distortions fro... |
gr-qc/9905027 | Luciano Rezzolla | L. Rezzolla, M. Shibata, H. Asada, T. W. Baumgarte, and S. L. Shapiro | Constructing a Mass-Current Radiation-Reaction Force For Numerical
Simulations | 17 pages, Latex2e, emulateapj.sty. To appear in ApJ | ApJ, 525:935-949, 1999 | 10.1086/307942 | null | gr-qc astro-ph | null | We present a new set of 3.5 Post-Newtonian equations in which Newtonian
hydrodynamics is coupled to the nonconservative effects of gravitational
radiation emission. Our formalism differs in two significant ways from a
similar 3.5 Post-Newtonian approach proposed by Blanchet (1993, 1997). Firstly
we concentrate only o... | [
{
"created": "Sat, 8 May 1999 21:59:06 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Rezzolla",
"L.",
""
],
[
"Shibata",
"M.",
""
],
[
"Asada",
"H.",
""
],
[
"Baumgarte",
"T. W.",
""
],
[
"Shapiro",
"S. L.",
""
]
] | We present a new set of 3.5 Post-Newtonian equations in which Newtonian hydrodynamics is coupled to the nonconservative effects of gravitational radiation emission. Our formalism differs in two significant ways from a similar 3.5 Post-Newtonian approach proposed by Blanchet (1993, 1997). Firstly we concentrate only on ... |
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