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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2003.05693 | Pradip Mukherjee | Rabin Banerjee and Pradip Mukherjee | Canonical Formulation for a Non-relativistic Spinning Particle Coupled
to Gravity | 27 pages, latex; Considerably expanded, A new section added, abstract
modified; No change in the main results; Published version | Classical and Quantum gravity, 37 (2020)235004 | 10.1088/1361-6382/abbb62 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We systematically derive an action for a nonrelativistic spinning partile in
flat background and discuss its canonical formulation in both Lagrangian and
Hamiltonian approaches. This action is taken as the starting point for deriving
the corresponding action in a curved background. It is achieved by following
our rec... | [
{
"created": "Thu, 12 Mar 2020 10:29:22 GMT",
"version": "v1"
},
{
"created": "Sat, 31 Oct 2020 16:17:18 GMT",
"version": "v2"
}
] | 2020-12-02 | [
[
"Banerjee",
"Rabin",
""
],
[
"Mukherjee",
"Pradip",
""
]
] | We systematically derive an action for a nonrelativistic spinning partile in flat background and discuss its canonical formulation in both Lagrangian and Hamiltonian approaches. This action is taken as the starting point for deriving the corresponding action in a curved background. It is achieved by following our recen... |
gr-qc/0006047 | Pawel Nurowski | Pawe{\l} Nurowski, David C. Robinson | Intrinsic Geometry of a Null Hypersurface | null | Class.Quant.Grav. 17 (2000) 4065-4084 | 10.1088/0264-9381/17/19/308 | null | gr-qc | null | We apply Cartan's method of equivalence to construct invariants of a given
null hypersurface in a Lorentzian space-time. This enables us to fully classify
the internal geometry of such surfaces and hence solve the local equivalence
problem for null hypersurface structures in 4-dimensional Lorentzian
space-times.
| [
{
"created": "Tue, 13 Jun 2000 19:19:48 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Nurowski",
"Paweł",
""
],
[
"Robinson",
"David C.",
""
]
] | We apply Cartan's method of equivalence to construct invariants of a given null hypersurface in a Lorentzian space-time. This enables us to fully classify the internal geometry of such surfaces and hence solve the local equivalence problem for null hypersurface structures in 4-dimensional Lorentzian space-times. |
1706.06023 | Salvador Robles-Perez | Salvador J. Robles-Perez | Quantum cosmology of a conformal multiverse | 21 pages, 15 figures | Phys. Rev. D 96, 063511 (2017) | 10.1103/PhysRevD.96.063511 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper it is studied the cosmology of a homogeneous and isotropic
spacetime endorsed with a conformally coupled massless scalar field. We find
six different solutions of the Friedmann equation that represent six different
types of universes, all of them are periodically distributed along the complex
time axis.... | [
{
"created": "Mon, 19 Jun 2017 15:45:26 GMT",
"version": "v1"
}
] | 2017-09-20 | [
[
"Robles-Perez",
"Salvador J.",
""
]
] | In this paper it is studied the cosmology of a homogeneous and isotropic spacetime endorsed with a conformally coupled massless scalar field. We find six different solutions of the Friedmann equation that represent six different types of universes, all of them are periodically distributed along the complex time axis. F... |
1605.01499 | Gaurav Yadav | Gaurav Yadav, Baby Komal, Bibhas Ranjan Majhi | Rainbow Rindler metric and Unruh effect | Modified version, to appear in Int.J.Mod.Phys. A | Int.J.Mod.Phys. A 32 (2017) 1750196 | 10.1142/S0217751X17501962 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The energy of a particle moving on a spacetime, in principle, can affect the
background metric. The modifications to it depend on the ratio of energy of the
particle and the Planck energy, known as rainbow gravity. Here we find the
explicit expressions for the coordinate transformations from rainbow Minkowski
spaceti... | [
{
"created": "Thu, 5 May 2016 06:09:03 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Jun 2016 12:46:45 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Dec 2017 06:21:38 GMT",
"version": "v3"
}
] | 2017-12-06 | [
[
"Yadav",
"Gaurav",
""
],
[
"Komal",
"Baby",
""
],
[
"Majhi",
"Bibhas Ranjan",
""
]
] | The energy of a particle moving on a spacetime, in principle, can affect the background metric. The modifications to it depend on the ratio of energy of the particle and the Planck energy, known as rainbow gravity. Here we find the explicit expressions for the coordinate transformations from rainbow Minkowski spacetime... |
1006.3903 | Adam Pound | Adam Pound | Motion of small bodies in general relativity: foundations and
implementations of the self-force | 246 pages, 15 figures, PhD thesis, abstract truncated to meet arXiv
requirements | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extreme mass-ratio inspirals, in which solar-mass compact bodies spiral into
supermassive black holes, are an important potential source for gravitational
wave detectors. Because of the extreme mass-ratio, one can model these systems
using perturbation theory. However, in order to relate the motion of the small
body ... | [
{
"created": "Sun, 20 Jun 2010 02:20:15 GMT",
"version": "v1"
}
] | 2010-06-22 | [
[
"Pound",
"Adam",
""
]
] | Extreme mass-ratio inspirals, in which solar-mass compact bodies spiral into supermassive black holes, are an important potential source for gravitational wave detectors. Because of the extreme mass-ratio, one can model these systems using perturbation theory. However, in order to relate the motion of the small body to... |
gr-qc/0304078 | Julio Cesar Fabris | F.G. Alvarenga, A.B. Batista, J.C. Fabris and S.V.B. Gon\c{c}alves | Troubles with quantum anistropic cosmological models: Loss of unitarity | Latex file, 18 pages. To appear in General Relativity and Gravitation | Gen.Rel.Grav. 35 (2003) 1659-1677 | 10.1023/A:1025735202959 | null | gr-qc hep-th quant-ph | null | The anisotropic Bianchi I cosmological model coupled with perfect fluid is
quantized in the minisuperspace. The perfect fluid is described by using the
Schutz formalism which allows to attribute dynamical degrees of freedom to
matter. A Schr\"odinger-type equation is obtained where the matter variables
play the role ... | [
{
"created": "Tue, 22 Apr 2003 13:26:50 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Alvarenga",
"F. G.",
""
],
[
"Batista",
"A. B.",
""
],
[
"Fabris",
"J. C.",
""
],
[
"Gonçalves",
"S. V. B.",
""
]
] | The anisotropic Bianchi I cosmological model coupled with perfect fluid is quantized in the minisuperspace. The perfect fluid is described by using the Schutz formalism which allows to attribute dynamical degrees of freedom to matter. A Schr\"odinger-type equation is obtained where the matter variables play the role of... |
1806.09993 | Chen-Yu Liu | Chen-Yu Liu | Chaotic Motion of Charged Particles around a Weakly Magnetized
Kerr-Newman Black Hole | 24 pages, 22 figures. arXiv admin note: text overlap with
arXiv:1407.7069 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider a charged particle moves around a Weakly
Magnetized Kerr-Newman black hole. We first study its circular motion with a
detailed analysis in the innermost stable circular orbits(ISCO). Then the
dynamics of a particle, kicked out from the circular orbit, is also explored.
The final states can ... | [
{
"created": "Sun, 24 Jun 2018 14:35:27 GMT",
"version": "v1"
}
] | 2018-06-27 | [
[
"Liu",
"Chen-Yu",
""
]
] | In this paper, we consider a charged particle moves around a Weakly Magnetized Kerr-Newman black hole. We first study its circular motion with a detailed analysis in the innermost stable circular orbits(ISCO). Then the dynamics of a particle, kicked out from the circular orbit, is also explored. The final states can be... |
1912.09709 | Wonwoo Lee | Hyeong-Chan Kim, Bum-Hoon Lee, Wonwoo Lee, and Youngone Lee | Rotating black holes with an anisotropic matter field | 20 pages, 4 figures, reference added | Phys. Rev. D 101, 064067 (2020) | 10.1103/PhysRevD.101.064067 | null | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a family of new rotating black hole solutions to Einstein's
equations that generalizes the Kerr-Newman spacetime to include an anisotropic
matter. The geometry is obtained by employing the Newman-Janis algorithm. In
addition to the mass, the charge and the angular momentum, an additional hair
exists thanks... | [
{
"created": "Fri, 20 Dec 2019 09:13:34 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Mar 2020 11:16:01 GMT",
"version": "v2"
}
] | 2020-04-08 | [
[
"Kim",
"Hyeong-Chan",
""
],
[
"Lee",
"Bum-Hoon",
""
],
[
"Lee",
"Wonwoo",
""
],
[
"Lee",
"Youngone",
""
]
] | We present a family of new rotating black hole solutions to Einstein's equations that generalizes the Kerr-Newman spacetime to include an anisotropic matter. The geometry is obtained by employing the Newman-Janis algorithm. In addition to the mass, the charge and the angular momentum, an additional hair exists thanks t... |
1411.7258 | Linda Linsefors | Linda Linsefors and Aurelien Barrau | Restrictions on curved cosmologies in modified gravity from metric
considerations | 7 pages, 2 figures | Phys.Lett. B748 (2015) 295-300 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This study uses very simple symmetry and consistency considerations to put
constraints on possible Friedmann equations for modified gravity models in
curved spaces. As an example, it is applied to loop quantum cosmology.
| [
{
"created": "Wed, 26 Nov 2014 14:54:31 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Nov 2014 12:23:09 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Jan 2015 12:59:45 GMT",
"version": "v3"
}
] | 2016-06-21 | [
[
"Linsefors",
"Linda",
""
],
[
"Barrau",
"Aurelien",
""
]
] | This study uses very simple symmetry and consistency considerations to put constraints on possible Friedmann equations for modified gravity models in curved spaces. As an example, it is applied to loop quantum cosmology. |
gr-qc/0112075 | Hiroko Koyama | Hiroko Koyama and Akira Tomimatsu | Slowly decaying tails of massive scalar fields in spherically symmetric
spacetimes | 21 pages, 3 figures. some comments and references are added. accepted
for publication in PRD | Phys.Rev.D65:084031,2002 | 10.1103/PhysRevD.65.084031 | null | gr-qc | null | We study the dominant late-time behaviors of massive scalar fields in static
and spherically symmetric spacetimes. Considering the field evolution in the
far zone where the gravitational field is weak, we show under which conditions
the massive field oscillates with an amplitude that decays slowly as $t^{-5/6}$
at ve... | [
{
"created": "Thu, 27 Dec 2001 09:02:29 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Jan 2002 09:18:34 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Koyama",
"Hiroko",
""
],
[
"Tomimatsu",
"Akira",
""
]
] | We study the dominant late-time behaviors of massive scalar fields in static and spherically symmetric spacetimes. Considering the field evolution in the far zone where the gravitational field is weak, we show under which conditions the massive field oscillates with an amplitude that decays slowly as $t^{-5/6}$ at very... |
gr-qc/0212020 | Antonio Alfonso-Faus | Antonio Alfonso-Faus (E.U.I.T. Aeronautica, Spain) | Implications of a Time-Varying Fine Structure Constant | Submitted to the European Journal of Physics | null | null | null | gr-qc | null | Much work has been done after the possibility of a fine structure constant
being time-varying. It has been taken as an indication of a time-varying speed
of light. Here we prove that this is not the case. We prove that the speed of
light may or may not vary with time, independently of the fine structure
constant bein... | [
{
"created": "Wed, 4 Dec 2002 11:50:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Alfonso-Faus",
"Antonio",
"",
"E.U.I.T. Aeronautica, Spain"
]
] | Much work has been done after the possibility of a fine structure constant being time-varying. It has been taken as an indication of a time-varying speed of light. Here we prove that this is not the case. We prove that the speed of light may or may not vary with time, independently of the fine structure constant being ... |
1103.5731 | Abril Su\'arez | Abril Su\'arez and Tonatiuh Matos | Bose-Einstein condensate dark matter phase transition from finite
temperature symmetry breaking of Klein-Gordon fields | Substantial changes have been made to the paper, following the
referees recommendations. 16 pages. Published in Classical and Quantum
Gravity | Abril Su\'arez and Tonatiuh Matos 2014 Class. Quantum Grav. 31
045015 | 10.1088/0264-9381/31/4/045015 | null | gr-qc astro-ph.CO cond-mat.other hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper the thermal evolution of scalar field dark matter particles at
finite cosmological temperatures is studied. Starting with a real scalar field
in a thermal bath and using the one loop quantum corrections potential, we
rewrite Klein-Gordon's (KG) equation in its hydrodynamical representation and
study the... | [
{
"created": "Tue, 29 Mar 2011 19:10:22 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Mar 2011 01:42:31 GMT",
"version": "v2"
},
{
"created": "Mon, 30 May 2011 15:40:42 GMT",
"version": "v3"
},
{
"created": "Thu, 9 Jun 2011 00:51:41 GMT",
"version": "v4"
},
{
"cr... | 2014-02-04 | [
[
"Suárez",
"Abril",
""
],
[
"Matos",
"Tonatiuh",
""
]
] | In this paper the thermal evolution of scalar field dark matter particles at finite cosmological temperatures is studied. Starting with a real scalar field in a thermal bath and using the one loop quantum corrections potential, we rewrite Klein-Gordon's (KG) equation in its hydrodynamical representation and study the p... |
gr-qc/0509036 | Puxun Wu | Puxun Wu and Hongwei Yu | Statefinder parameters for quintom dark energy model | 11 pages, including 8 figures, added references | Int.J.Mod.Phys.D14:1873-1882,2005 | 10.1142/S0218271805007486 | null | gr-qc astro-ph | null | We perform in this paper a statefinder diagnostic to a dark energy model with
two scalar fields, called "quintom", where one of the scalar fields has a
canonical kinetic energy term and the other has a negative one. Several kinds
of potentials are discussed. Our results show that the statefinder diagnostic
can differ... | [
{
"created": "Sat, 10 Sep 2005 08:38:04 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Jan 2006 02:48:31 GMT",
"version": "v2"
}
] | 2009-09-01 | [
[
"Wu",
"Puxun",
""
],
[
"Yu",
"Hongwei",
""
]
] | We perform in this paper a statefinder diagnostic to a dark energy model with two scalar fields, called "quintom", where one of the scalar fields has a canonical kinetic energy term and the other has a negative one. Several kinds of potentials are discussed. Our results show that the statefinder diagnostic can differen... |
2109.09514 | Adam Pound | Riccardo Bonetto, Adam Pound, and Zeyd Sam | Deformed Schwarzschild horizons in second-order perturbation theory:
mass, geometry, and teleology | 39 pages, 4 figures. v2 modifies the title, abstract, and Conclusion
to better highlight the content. v3 corrects minor typos | Phys. Rev. D 105, 024048 (2022) | 10.1103/PhysRevD.105.024048 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent years, gravitational-wave astronomy has motivated increasingly
accurate perturbative studies of gravitational dynamics in compact binaries.
This in turn has enabled more detailed analyses of the dynamical black holes in
these systems. For example, Pound et al. [Phys. Rev. Lett. 124, 021101 (2020)]
recently ... | [
{
"created": "Mon, 20 Sep 2021 12:59:17 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Dec 2021 01:16:16 GMT",
"version": "v2"
},
{
"created": "Sat, 8 Jan 2022 22:22:27 GMT",
"version": "v3"
}
] | 2022-01-24 | [
[
"Bonetto",
"Riccardo",
""
],
[
"Pound",
"Adam",
""
],
[
"Sam",
"Zeyd",
""
]
] | In recent years, gravitational-wave astronomy has motivated increasingly accurate perturbative studies of gravitational dynamics in compact binaries. This in turn has enabled more detailed analyses of the dynamical black holes in these systems. For example, Pound et al. [Phys. Rev. Lett. 124, 021101 (2020)] recently co... |
1804.03897 | Flavio Bombacigno | Flavio Bombacigno and Giovanni Montani | $f(R)$ gravity with Torsion and the Immirzi field: signature for GW
detection | 8 pages, 4 figures; v2 comments added, references update | Phys. Rev. D 97, 124066 (2018) | 10.1103/PhysRevD.97.124066 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a Nieh-Yan extension of f (R) models in the presence of Immirzi
field and the resulting theory is studied in the context of first order
formalism. We claim as in our model the ambiguities related to the Palatini
vacuum case are solved, allowing us to extend the range of applicability of the
method proposed... | [
{
"created": "Wed, 11 Apr 2018 09:37:05 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Jun 2018 12:32:54 GMT",
"version": "v2"
}
] | 2018-07-04 | [
[
"Bombacigno",
"Flavio",
""
],
[
"Montani",
"Giovanni",
""
]
] | We propose a Nieh-Yan extension of f (R) models in the presence of Immirzi field and the resulting theory is studied in the context of first order formalism. We claim as in our model the ambiguities related to the Palatini vacuum case are solved, allowing us to extend the range of applicability of the method proposed i... |
1502.06613 | Dario Bettoni | Dario Bettoni, Stefano Liberati | Dynamics of non-minimally coupled perfect fluids | 26 pages, 2 appendix, no figures. Revised version: new sections
discussing the absence of extra degrees of freedom and the cosmological
linear perturbations. Published in JCAP | null | 10.1088/1475-7516/2015/08/023 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a general formulation of the theory for a non-minimally coupled
perfect fluid in which both conformal and disformal couplings are present. We
discuss how such non-minimal coupling is compatible with the assumptions of a
perfect fluid and derive both the Einstein and the fluid equations for such
model. We f... | [
{
"created": "Mon, 23 Feb 2015 21:00:14 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Oct 2015 11:55:31 GMT",
"version": "v2"
}
] | 2015-10-20 | [
[
"Bettoni",
"Dario",
""
],
[
"Liberati",
"Stefano",
""
]
] | We present a general formulation of the theory for a non-minimally coupled perfect fluid in which both conformal and disformal couplings are present. We discuss how such non-minimal coupling is compatible with the assumptions of a perfect fluid and derive both the Einstein and the fluid equations for such model. We fou... |
1508.06580 | Matthew Wright | Sebastian Bahamonde and Matthew Wright | Teleparallel quintessence with a nonminimal coupling to a boundary term | Equation (27) corrected. Subsequent equations correspondingly
corrected. Results and conclusions are unchanged | Phys. Rev. D 92, 084034 (2015) | 10.1103/PhysRevD.92.084034 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new model in the teleparallel framework where we consider a
scalar field nonminimally coupled to both the torsion $T$ and a boundary term
given by the divergence of the torsion vector $B=\frac{2}{e}\partial_\mu
(eT^\mu)$. This is inspired by the relation $R=-T+B$ between the Ricci scalar
of general relat... | [
{
"created": "Wed, 26 Aug 2015 17:32:40 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Sep 2015 08:17:30 GMT",
"version": "v2"
},
{
"created": "Mon, 19 Oct 2015 15:18:47 GMT",
"version": "v3"
},
{
"created": "Mon, 25 Apr 2016 12:01:34 GMT",
"version": "v4"
}
] | 2016-04-26 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Wright",
"Matthew",
""
]
] | We propose a new model in the teleparallel framework where we consider a scalar field nonminimally coupled to both the torsion $T$ and a boundary term given by the divergence of the torsion vector $B=\frac{2}{e}\partial_\mu (eT^\mu)$. This is inspired by the relation $R=-T+B$ between the Ricci scalar of general relativ... |
1707.01017 | Yong Cai | Yong Cai, Yun-Song Piao | Higher order derivative coupling to gravity and its cosmological
implications | 16 pages, 6 figures, published in PRD, two figures added | Phys. Rev. D 96, 124028 (2017) | 10.1103/PhysRevD.96.124028 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the $R^{(3)}\delta K$ operator in effective field theory is
significant for avoiding the instability of nonsingular bounce, where $R^{(3)}$
and $K_{\mu\nu}$ are the three-dimensional Ricci scalar and the extrinsic
curvature on the spacelike hypersurface, respectively. We point out that the
covariant Lagr... | [
{
"created": "Tue, 4 Jul 2017 14:38:41 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jul 2017 15:08:14 GMT",
"version": "v2"
},
{
"created": "Sun, 31 Dec 2017 16:07:17 GMT",
"version": "v3"
}
] | 2018-01-03 | [
[
"Cai",
"Yong",
""
],
[
"Piao",
"Yun-Song",
""
]
] | We show that the $R^{(3)}\delta K$ operator in effective field theory is significant for avoiding the instability of nonsingular bounce, where $R^{(3)}$ and $K_{\mu\nu}$ are the three-dimensional Ricci scalar and the extrinsic curvature on the spacelike hypersurface, respectively. We point out that the covariant Lagran... |
gr-qc/0005061 | Alicia M. Sintes | A.M. Sintes, B.F. Schutz | Removal of interference from gravitational wave spectrum | Latex, 6 pages, 2 figures. Published in "Proceedings of the 2nd
workshop on Gravitational Wave Data Analysis". Edts. M. Davier and P. Hello;
Editions Fronti\`eres, pp. 255-260 (1998) | null | null | null | gr-qc | null | We develop a procedure to remove interference from gravitational wave
spectrum.
The method is applied to the data produced by the Glasgow laser
interferometer in 1996 and all the lines corresponding to the interference with
the main supply are removed.
| [
{
"created": "Tue, 16 May 2000 12:55:59 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Sintes",
"A. M.",
""
],
[
"Schutz",
"B. F.",
""
]
] | We develop a procedure to remove interference from gravitational wave spectrum. The method is applied to the data produced by the Glasgow laser interferometer in 1996 and all the lines corresponding to the interference with the main supply are removed. |
1305.4664 | Felipe Falciano | F. T. Falciano, Nelson Pinto-Neto and Sandro Dias Pinto Vitenti | Scalar Field Perturbations with Arbitrary Potentials in Quantum
Backgrounds | 9 pages, no figures | Phys. Rev. D 87, 103514 (2013) | 10.1103/PhysRevD.87.103514 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper it is shown how to obtain, without ever using the background
classical equations of motion, a simple second order Hamiltonian involving the
Mukhanov-Sasaki variable describing quantum linear scalar perturbations for the
case of scalar fields with arbitrary potentials and arbitrary spacelike
hyper-surfac... | [
{
"created": "Mon, 20 May 2013 21:29:31 GMT",
"version": "v1"
}
] | 2013-05-22 | [
[
"Falciano",
"F. T.",
""
],
[
"Pinto-Neto",
"Nelson",
""
],
[
"Vitenti",
"Sandro Dias Pinto",
""
]
] | In this paper it is shown how to obtain, without ever using the background classical equations of motion, a simple second order Hamiltonian involving the Mukhanov-Sasaki variable describing quantum linear scalar perturbations for the case of scalar fields with arbitrary potentials and arbitrary spacelike hyper-surfaces... |
1211.2779 | Alcides Garat | Alcides Garat | Covariant diagonalization of the perfect fluid stress-energy tensor | null | Int.J.Geom.Meth.Mod.Phys. 12 (2015) no.03, 1550031 | 10.1142/S0219887815500310 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce new tetrads that manifestly and covariantly diagonalize the
stress-energy tensor for a perfect fluid with vorticity at every spacetime
point. We discuss the origin of inertia in this special case from the
standpoint of our new local tetrads. We believe that this new tetrad might
bring about simplificatio... | [
{
"created": "Mon, 12 Nov 2012 20:42:16 GMT",
"version": "v1"
}
] | 2019-08-22 | [
[
"Garat",
"Alcides",
""
]
] | We introduce new tetrads that manifestly and covariantly diagonalize the stress-energy tensor for a perfect fluid with vorticity at every spacetime point. We discuss the origin of inertia in this special case from the standpoint of our new local tetrads. We believe that this new tetrad might bring about simplification ... |
gr-qc/0008015 | Yuri N. Obukhov | Yuri N. Obukhov | Spin-driven inflation | plain Tex, 6 pages, no figures | Phys.Lett.A182:214-216,1993 | 10.1016/0375-9601(93)91059-E | null | gr-qc | null | Following recent studies of Ford, we suggest -- in the framework of general
relativity -- an inflationary cosmological model with the self-interacting
spinning matter. A generalization of the standard fluid model is discussed and
estimates of the physical parameters of the evolution are given.
| [
{
"created": "Mon, 7 Aug 2000 14:15:05 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Obukhov",
"Yuri N.",
""
]
] | Following recent studies of Ford, we suggest -- in the framework of general relativity -- an inflationary cosmological model with the self-interacting spinning matter. A generalization of the standard fluid model is discussed and estimates of the physical parameters of the evolution are given. |
gr-qc/9905003 | Carey Carpenter Briggs | C. C. Briggs | A General Expression for the 14th Chern Form | 2 pages | null | null | null | gr-qc | null | A general expression is given for the 14th Chern form 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 23:30:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Briggs",
"C. C.",
""
]
] | A general expression is given for the 14th Chern form in terms of simple polynomial concomitants of the curvature 2-form for n-dimensional differentiable manifolds having a general linear connection. |
2011.09494 | Neil J. Cornish | Neil J. Cornish, Tyson B. Littenberg, Bence B\'ecsy, Katerina
Chatziioannou, James A. Clark, Sudarshan Ghonge, Margaret Millhouse | The BayesWave analysis pipeline in the era of gravitational wave
observations | 19 pages, 16 figures | Phys. Rev. D 103, 044006 (2021) | 10.1103/PhysRevD.103.044006 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe updates and improvements to the BayesWave gravitational wave
transient analysis pipeline, and provide examples of how the algorithm is used
to analyze data from ground-based gravitational wave detectors. BayesWave
models gravitational wave signals in a morphology-independent manner through a
sum of frame ... | [
{
"created": "Wed, 18 Nov 2020 19:03:30 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jan 2021 15:19:43 GMT",
"version": "v2"
}
] | 2021-02-10 | [
[
"Cornish",
"Neil J.",
""
],
[
"Littenberg",
"Tyson B.",
""
],
[
"Bécsy",
"Bence",
""
],
[
"Chatziioannou",
"Katerina",
""
],
[
"Clark",
"James A.",
""
],
[
"Ghonge",
"Sudarshan",
""
],
[
"Millhouse",
"Margaret"... | We describe updates and improvements to the BayesWave gravitational wave transient analysis pipeline, and provide examples of how the algorithm is used to analyze data from ground-based gravitational wave detectors. BayesWave models gravitational wave signals in a morphology-independent manner through a sum of frame fu... |
2203.13586 | Massimo Giovannini | Massimo Giovannini | Relic gravitons at intermediate frequencies and the expansion history of
the Universe | 37 pages, 16 figures | null | 10.1103/PhysRevD.105.103524 | null | gr-qc astro-ph.CO hep-ex hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | The early expansion history of the Universe is constrained by combining the
most recent limits on the cosmic gravitons in the audio band and the claimed
evidences of the nHz domain. The simplest scenario stipulates that between the
end of inflation and the formation of light nuclei the evolution consists of a
single ... | [
{
"created": "Fri, 25 Mar 2022 11:29:34 GMT",
"version": "v1"
}
] | 2022-06-01 | [
[
"Giovannini",
"Massimo",
""
]
] | The early expansion history of the Universe is constrained by combining the most recent limits on the cosmic gravitons in the audio band and the claimed evidences of the nHz domain. The simplest scenario stipulates that between the end of inflation and the formation of light nuclei the evolution consists of a single ph... |
1609.00350 | Joan Sola | Joan Sola, Elahe Karimkhani, A. Khodam-Mohammadi | Higgs potential from extended Brans-Dicke theory and the time-evolution
of the fundamental constants | Version accepted in Class.Quant.Grav. Extended discussion, references
added | Class.Quant.Grav. 34 (2017) no.2, 025006 | 10.1088/1361-6382/34/2/025006 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Despite the enormous significance of the Higgs potential in the context of
the Standard Model of electroweak interactions and in Grand Unified Theories,
its ultimate origin is fundamentally unknown and must be introduced by hand in
accordance with the underlying gauge symmetry and the requirement of
renormalizability... | [
{
"created": "Thu, 1 Sep 2016 19:08:57 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Nov 2016 21:05:26 GMT",
"version": "v2"
}
] | 2018-03-01 | [
[
"Sola",
"Joan",
""
],
[
"Karimkhani",
"Elahe",
""
],
[
"Khodam-Mohammadi",
"A.",
""
]
] | Despite the enormous significance of the Higgs potential in the context of the Standard Model of electroweak interactions and in Grand Unified Theories, its ultimate origin is fundamentally unknown and must be introduced by hand in accordance with the underlying gauge symmetry and the requirement of renormalizability. ... |
1802.05958 | Alain Dirkes | Alain Dirkes | - Gravitational Waves - A Review on the Conceptual Foundations of
Gravitational Radiation | 28 pages, 7 figures | Int. J. Mod. Phys. A Vol. 33 (2018) 1830013 | 10.1142/S0217751X18300132 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this manuscript we review the theoretical foundations of gravitational
waves in the framework of Albert Einstein's theory of general relativity.
Following Einstein's early efforts we first derive the linearised Einstein
field equations and work out the corresponding gravitational wave equation.
Moreover we present... | [
{
"created": "Wed, 14 Feb 2018 16:59:11 GMT",
"version": "v1"
}
] | 2018-05-22 | [
[
"Dirkes",
"Alain",
""
]
] | In this manuscript we review the theoretical foundations of gravitational waves in the framework of Albert Einstein's theory of general relativity. Following Einstein's early efforts we first derive the linearised Einstein field equations and work out the corresponding gravitational wave equation. Moreover we present t... |
1812.09054 | Joan Josep Ferrando | Bartolom\'e Coll, Joan Josep Ferrando and Juan Antonio S\'aez | Thermodynamic class II Szekeres-Szafron solutions. Singular models | 22 pages, 1 figure | Class. Quantum Grav. 36 (2019) 175004 | 10.1088/1361-6382/ab3488 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A family of parabolic Szekeres-Szafron class II solutions in local thermal
equilibrium is studied and their associated thermodynamics are obtained. The
subfamily with the hydrodynamic behavior of a generic ideal gas (defined by the
equation of state $p = k n \Theta$) results to be an inhomogeneous
generalization of f... | [
{
"created": "Fri, 21 Dec 2018 11:17:51 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Oct 2019 14:27:50 GMT",
"version": "v2"
}
] | 2019-10-16 | [
[
"Coll",
"Bartolomé",
""
],
[
"Ferrando",
"Joan Josep",
""
],
[
"Sáez",
"Juan Antonio",
""
]
] | A family of parabolic Szekeres-Szafron class II solutions in local thermal equilibrium is studied and their associated thermodynamics are obtained. The subfamily with the hydrodynamic behavior of a generic ideal gas (defined by the equation of state $p = k n \Theta$) results to be an inhomogeneous generalization of fla... |
2209.07054 | Megandhren Govender | Andronikos Paliathanasis, Robert S. Bogadi and Megandhren Govender | Lie symmetry approach to the time-dependent Karmarkar condition | 11 pages | null | 10.1140/epjc/s10052-022-10929-2 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We obtain solutions of the time-dependent Einstein Field Equations which
satisfy the Karmarkar condition via the method of Lie symmetries. Spherically
symmetric spacetime metrics are used with metric functions set to impose
conformal flatness, Weyl-free collapse and shear-free collapse. In particular,
a solution was ... | [
{
"created": "Thu, 15 Sep 2022 05:20:50 GMT",
"version": "v1"
}
] | 2022-11-23 | [
[
"Paliathanasis",
"Andronikos",
""
],
[
"Bogadi",
"Robert S.",
""
],
[
"Govender",
"Megandhren",
""
]
] | We obtain solutions of the time-dependent Einstein Field Equations which satisfy the Karmarkar condition via the method of Lie symmetries. Spherically symmetric spacetime metrics are used with metric functions set to impose conformal flatness, Weyl-free collapse and shear-free collapse. In particular, a solution was fo... |
1712.04090 | Edward Anderson | Edward Anderson | Shape (In)dependent Inequalities for Triangleland's Jacobi and
Democratic-Linear Ellipticity Quantitities | 22 pages including 8 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Sides and medians are both Jacobi coordinate magnitudes, moreover then
equably entering the spherical coordinates on Kendall's shape sphere and the
Hopf coordinates. This motivates treating medians on the same footing as sides
in triangle geometry and the resulting Shape Theory. In this paper, we
consequently reformu... | [
{
"created": "Tue, 12 Dec 2017 01:24:59 GMT",
"version": "v1"
}
] | 2017-12-13 | [
[
"Anderson",
"Edward",
""
]
] | Sides and medians are both Jacobi coordinate magnitudes, moreover then equably entering the spherical coordinates on Kendall's shape sphere and the Hopf coordinates. This motivates treating medians on the same footing as sides in triangle geometry and the resulting Shape Theory. In this paper, we consequently reformula... |
0811.4231 | Lau Loi So | Lau Loi So and James M. Nester | Gravitational energy-momentum in small regions according to the
tetrad-teleparallel expressions | 11 pages, a major revision of gr-qc/0612061 and will be published in
the Chin. J. Phys | Chin. J. Phys. 47 (2009) 10-19 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational energy-momentum within a small region as determined by two
tetrad-teleparallel expressions is evaluated with the aid of an orthonormal
frame adapted to Riemann normal coordinates. We find that the gauge current
"tensor" does enjoy the highly desired and rare property of being a positive
multiple of ... | [
{
"created": "Wed, 26 Nov 2008 06:29:28 GMT",
"version": "v1"
}
] | 2012-07-31 | [
[
"So",
"Lau Loi",
""
],
[
"Nester",
"James M.",
""
]
] | The gravitational energy-momentum within a small region as determined by two tetrad-teleparallel expressions is evaluated with the aid of an orthonormal frame adapted to Riemann normal coordinates. We find that the gauge current "tensor" does enjoy the highly desired and rare property of being a positive multiple of th... |
1607.04192 | Pena Francisco | Norman Cruz and Samuel Lepe | Crossing the phantom divide with dissipative normal matter in the
Israel-Stewart-Hiscock formalism | 9 pages, 2 figures | null | 10.1016/j.physletb.2017.01.035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A phantom solution in the framework of the causal Israel-Stewart (IS)
formalism is discussed. We assume a late time behavior of the cosmic evolution
by considering only one dominant matter fluid with viscosity. In the model it
is assumed a bulk viscosity of the form $\xi= \xi_{0}\rho^{1/2}$, where $\rho$
is the energ... | [
{
"created": "Thu, 14 Jul 2016 16:26:44 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Nov 2016 14:56:05 GMT",
"version": "v2"
}
] | 2017-02-01 | [
[
"Cruz",
"Norman",
""
],
[
"Lepe",
"Samuel",
""
]
] | A phantom solution in the framework of the causal Israel-Stewart (IS) formalism is discussed. We assume a late time behavior of the cosmic evolution by considering only one dominant matter fluid with viscosity. In the model it is assumed a bulk viscosity of the form $\xi= \xi_{0}\rho^{1/2}$, where $\rho$ is the energy ... |
1510.00855 | Jorge Ovalle | J. Ovalle | Extending the geometric deformation: New black hole solutions | Based on the contributed lecture given at the 9th Alexander Friedmann
International Seminar, June 21-27, 2015, St. Petersburg, Russia | Int. J. Mod. Phys. Conf. Ser., 41, 1660132 (2016) | 10.1142/S2010194516601320 | null | gr-qc astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the extension of the Minimal Geometric Deformation approach, recently
developed to investigate the exterior of a self-gravitating system in the
Braneworld, to identified a master solution for the deformation undergone by
the radial metric component when time deformations are produced by bulk
gravitons. A speci... | [
{
"created": "Sat, 3 Oct 2015 18:38:58 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Jan 2016 19:02:11 GMT",
"version": "v2"
}
] | 2016-03-22 | [
[
"Ovalle",
"J.",
""
]
] | We use the extension of the Minimal Geometric Deformation approach, recently developed to investigate the exterior of a self-gravitating system in the Braneworld, to identified a master solution for the deformation undergone by the radial metric component when time deformations are produced by bulk gravitons. A specifi... |
1107.4112 | Swastik Bhattacharya | Swastik Bhattacharya | Singular and non-singular endstates in massless scalar field collapse | 4 pages, Published in Proceedings of JGRG19 (Japan, 2009) | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the collapse of a massless scalar field coupled to gravity. A class
of blackhole solutions are identified. We also report on a class of solutions
where collapse starts from a regular spacelike surface but then the collapsing
scalar field freezes. As a result, in these solutions, a black hole does not
form, n... | [
{
"created": "Wed, 20 Jul 2011 20:25:59 GMT",
"version": "v1"
}
] | 2011-07-22 | [
[
"Bhattacharya",
"Swastik",
""
]
] | We study the collapse of a massless scalar field coupled to gravity. A class of blackhole solutions are identified. We also report on a class of solutions where collapse starts from a regular spacelike surface but then the collapsing scalar field freezes. As a result, in these solutions, a black hole does not form, nei... |
2203.10109 | Jooheon Yoo | Jooheon Yoo, Vijay Varma, Matthew Giesler, Mark A. Scheel, Carl-Johan
Haster, Harald P. Pfeiffer, Lawrence E. Kidder, and Michael Boyle | Targeted large mass ratio numerical relativity surrogate waveform model
for GW190814 | 14 pages, 9 figures; Accepted for publication in PRD | null | 10.1103/PhysRevD.106.044001 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Gravitational wave observations of large mass ratio compact binary mergers
like GW190814 highlight the need for reliable, high-accuracy waveform templates
for such systems. We present NRHybSur2dq15, a new surrogate model trained on
hybridized numerical relativity (NR) waveforms with mass ratios $q\leq15$, and
aligned... | [
{
"created": "Fri, 18 Mar 2022 18:08:05 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Jul 2022 14:28:42 GMT",
"version": "v2"
}
] | 2022-08-17 | [
[
"Yoo",
"Jooheon",
""
],
[
"Varma",
"Vijay",
""
],
[
"Giesler",
"Matthew",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Haster",
"Carl-Johan",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Kidder",
"Lawrence E.",
""
... | Gravitational wave observations of large mass ratio compact binary mergers like GW190814 highlight the need for reliable, high-accuracy waveform templates for such systems. We present NRHybSur2dq15, a new surrogate model trained on hybridized numerical relativity (NR) waveforms with mass ratios $q\leq15$, and aligned s... |
gr-qc/9805004 | Claudia Pe\ga | Claudia Pe\c{c}a, Jose' P. S. Lemos | Thermodynamics of Reissner-Nordstrom-anti-de Sitter black holes in the
grand canonical ensemble | 15 pages, 9 figures, Revtex. Published version. Changes: figures
added to text | Phys.Rev. D59 (1999) 124007 | 10.1103/PhysRevD.59.124007 | null | gr-qc | null | The thermodynamical properties of the Reissner-Nordstr\"om-anti-de Sitter
black hole in the grand canonical ensemble are investigated using York's
formalism. The black hole is enclosed in a cavity with finite radius where the
temperature and electrostatic potential are fixed. The boundary conditions
allow us to compu... | [
{
"created": "Sat, 2 May 1998 17:36:39 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Mar 2000 02:51:48 GMT",
"version": "v2"
},
{
"created": "Wed, 12 Apr 2000 02:51:12 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Peça",
"Claudia",
""
],
[
"Lemos",
"Jose' P. S.",
""
]
] | The thermodynamical properties of the Reissner-Nordstr\"om-anti-de Sitter black hole in the grand canonical ensemble are investigated using York's formalism. The black hole is enclosed in a cavity with finite radius where the temperature and electrostatic potential are fixed. The boundary conditions allow us to compute... |
1911.01361 | Miriam Cabero | Miriam Cabero, Julian Westerweck, Collin D. Capano, Sumit Kumar, Alex
B. Nielsen, Badri Krishnan | The next decade of black hole spectroscopy | null | Phys. Rev. D 101, 064044 (2020) | 10.1103/PhysRevD.101.064044 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave observations of the ringdown of the remnant black hole in
a binary black hole coalescence provide a unique opportunity of confronting the
black hole no-hair theorem in general relativity with observational data. The
most robust tests are possible if multiple ringdown modes can be observed. In
this ... | [
{
"created": "Mon, 4 Nov 2019 17:43:57 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Dec 2019 01:21:18 GMT",
"version": "v2"
}
] | 2020-03-25 | [
[
"Cabero",
"Miriam",
""
],
[
"Westerweck",
"Julian",
""
],
[
"Capano",
"Collin D.",
""
],
[
"Kumar",
"Sumit",
""
],
[
"Nielsen",
"Alex B.",
""
],
[
"Krishnan",
"Badri",
""
]
] | Gravitational wave observations of the ringdown of the remnant black hole in a binary black hole coalescence provide a unique opportunity of confronting the black hole no-hair theorem in general relativity with observational data. The most robust tests are possible if multiple ringdown modes can be observed. In this pa... |
2001.04122 | Matteo Luca Ruggiero | Matteo Luca Ruggiero, Lorenzo Iorio | Probing a $r^{-n}$ modification of the Newtonian potential with
Exoplanets | 6 pages, references added; revised to match the version accepted for
publication in JCAP | JCAP06(2020)042 | 10.1088/1475-7516/2020/06/042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The growing availability of increasingly accurate data on transiting
exoplanets suggests the possibility of using these systems as possible testbeds
for modified models of gravity. In particular, we suggest that the
post-Keplerian (pK) dynamical effects from the perturbations of the Newtonian
potential falling off as... | [
{
"created": "Mon, 13 Jan 2020 09:44:59 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jan 2020 20:58:50 GMT",
"version": "v2"
},
{
"created": "Tue, 26 May 2020 18:30:53 GMT",
"version": "v3"
}
] | 2020-06-26 | [
[
"Ruggiero",
"Matteo Luca",
""
],
[
"Iorio",
"Lorenzo",
""
]
] | The growing availability of increasingly accurate data on transiting exoplanets suggests the possibility of using these systems as possible testbeds for modified models of gravity. In particular, we suggest that the post-Keplerian (pK) dynamical effects from the perturbations of the Newtonian potential falling off as t... |
0904.3566 | Peter K.F. Kuhfittig | Peter K.F. Kuhfittig | A single model of traversable wormholes supported by generalized phantom
energy or Chaplygin gas | 6 pages, no figures | Gen.Rel.Grav.41:1485-1496,2009 | 10.1007/s10714-008-0716-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper discusses a new variable equation of state parameter leading to
exact solutions of the Einstein field equations describing traversable
wormholes. In addition to generalizing the notion of phantom energy, the
equation of state generates a mathematical model that combines the generalized
phantom energy and t... | [
{
"created": "Wed, 22 Apr 2009 22:35:54 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Jul 2009 17:49:48 GMT",
"version": "v2"
}
] | 2010-04-28 | [
[
"Kuhfittig",
"Peter K. F.",
""
]
] | This paper discusses a new variable equation of state parameter leading to exact solutions of the Einstein field equations describing traversable wormholes. In addition to generalizing the notion of phantom energy, the equation of state generates a mathematical model that combines the generalized phantom energy and the... |
2305.13830 | Daiki Saito | Daiki Saito, Tomohiro Harada, Yasutaka Koga and Chul-Moon Yoo | Spins of primordial black holes formed with a soft equation of state | 21 pages, 6 figures, references added: version accepted for
publication in JCAP | null | 10.1088/1475-7516/2023/07/030 | RUP-23-11 | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We investigate the probability distribution of the spins of primordial black
holes (PBHs) formed in the universe dominated by a perfect fluid with the
linear equation of state $p=w\rho$, where $p$ and $\rho$ are the pressure and
energy density of the fluid, respectively. We particularly focus on the
parameter region ... | [
{
"created": "Tue, 23 May 2023 08:51:14 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Jun 2023 03:18:30 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Jun 2023 00:46:40 GMT",
"version": "v3"
}
] | 2023-07-19 | [
[
"Saito",
"Daiki",
""
],
[
"Harada",
"Tomohiro",
""
],
[
"Koga",
"Yasutaka",
""
],
[
"Yoo",
"Chul-Moon",
""
]
] | We investigate the probability distribution of the spins of primordial black holes (PBHs) formed in the universe dominated by a perfect fluid with the linear equation of state $p=w\rho$, where $p$ and $\rho$ are the pressure and energy density of the fluid, respectively. We particularly focus on the parameter region $0... |
1203.2674 | Stephen Privitera | The LIGO Scientific Collaboration, The Virgo Collaboration | Sensitivity Achieved by the LIGO and Virgo Gravitational Wave Detectors
during LIGO's Sixth and Virgo's Second and Third Science Runs | Associated data products are publicly accessible here
https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=63432 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We summarize the sensitivity achieved by the LIGO and Virgo gravitational
wave detectors for low-mass compact binary coalescence (CBC) searches during
LIGO's sixth science run and Virgo's second and third science runs. We present
strain noise power spectral densities (PSDs) which are representative of the
typical per... | [
{
"created": "Mon, 12 Mar 2012 23:30:01 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Mar 2012 18:23:34 GMT",
"version": "v2"
}
] | 2012-08-27 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"The Virgo Collaboration",
"",
""
]
] | We summarize the sensitivity achieved by the LIGO and Virgo gravitational wave detectors for low-mass compact binary coalescence (CBC) searches during LIGO's sixth science run and Virgo's second and third science runs. We present strain noise power spectral densities (PSDs) which are representative of the typical perfo... |
2207.07529 | Wei Zeng | Wei Zeng, Yi Ling, and Qing-Quan Jiang | Astrophysical observables for regular black holes with sub-Planckian
curvature | V1:23pages,8figures,V2:Changed the annotation format of figure 3, two
clerical errors were corrected on pages 18,19, no physics changes | null | 10.1088/1674-1137/acd530 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the photon sphere and the extremal stable circular orbit
(ESCO) for massive particles over a recently proposed regular black holes with
sub-Planckian curvature and Minkowskian core. We derive the effective potential
for geodesic orbits and determine the radius of circular photon orbits, with an
analysi... | [
{
"created": "Fri, 15 Jul 2022 15:23:50 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jul 2022 08:50:00 GMT",
"version": "v2"
}
] | 2023-07-19 | [
[
"Zeng",
"Wei",
""
],
[
"Ling",
"Yi",
""
],
[
"Jiang",
"Qing-Quan",
""
]
] | We investigate the photon sphere and the extremal stable circular orbit (ESCO) for massive particles over a recently proposed regular black holes with sub-Planckian curvature and Minkowskian core. We derive the effective potential for geodesic orbits and determine the radius of circular photon orbits, with an analysis ... |
1504.06606 | Eric Poisson | Philippe Landry and Eric Poisson | Gravitomagnetic response of an irrotational body to an applied tidal
field | 14 pages, 4 figures | null | 10.1103/PhysRevD.91.104026 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The deformation of a nonrotating body resulting from the application of a
tidal field is measured by two sets of Love numbers associated with the
gravitoelectric and gravitomagnetic pieces of the tidal field, respectively.
The gravitomagnetic Love numbers were previously computed for fluid bodies,
under the assumptio... | [
{
"created": "Fri, 24 Apr 2015 19:29:02 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Landry",
"Philippe",
""
],
[
"Poisson",
"Eric",
""
]
] | The deformation of a nonrotating body resulting from the application of a tidal field is measured by two sets of Love numbers associated with the gravitoelectric and gravitomagnetic pieces of the tidal field, respectively. The gravitomagnetic Love numbers were previously computed for fluid bodies, under the assumption ... |
1710.04367 | Yun Soo Myung | Leonardo Modesto, Yun Soo Myung, Sang-Heon Yi | Universality of the Unruh effect | 1+12 pages, no figures | Phys. Rev. D 97, 044016 (2018) | 10.1103/PhysRevD.97.044016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we prove the universal nature of the Unruh effect in a general
class of weakly non-local field theories.
At the same time we solve the tension between two conflicting claims
published in literature.
Our universality statement is based on two independent computations based on
the canonical formulatio... | [
{
"created": "Thu, 12 Oct 2017 04:55:55 GMT",
"version": "v1"
}
] | 2018-02-21 | [
[
"Modesto",
"Leonardo",
""
],
[
"Myung",
"Yun Soo",
""
],
[
"Yi",
"Sang-Heon",
""
]
] | In this paper we prove the universal nature of the Unruh effect in a general class of weakly non-local field theories. At the same time we solve the tension between two conflicting claims published in literature. Our universality statement is based on two independent computations based on the canonical formulation as w... |
gr-qc/0207124 | Orfeu Bertolami | O. Bertolami and L. Guisado | Noncommutative Scalar Field Coupled to Gravity | Revtex4, 6 pages. Final version to appear at Phys. Rev. D | Phys.Rev. D67 (2003) 025001 | 10.1103/PhysRevD.67.025001 | DF/IST-7.02 | gr-qc astro-ph hep-ph hep-th | null | A model for a noncommutative scalar field coupled to gravity is proposed via
an extension of the Moyal product. It is shown that there are solutions
compatible with homogeneity and isotropy to first non-trivial order in the
perturbation of the star-product, with the gravity sector described by a flat
Robertson-Walker... | [
{
"created": "Wed, 31 Jul 2002 16:22:16 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Sep 2002 13:52:15 GMT",
"version": "v2"
},
{
"created": "Thu, 19 Dec 2002 16:13:10 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Bertolami",
"O.",
""
],
[
"Guisado",
"L.",
""
]
] | A model for a noncommutative scalar field coupled to gravity is proposed via an extension of the Moyal product. It is shown that there are solutions compatible with homogeneity and isotropy to first non-trivial order in the perturbation of the star-product, with the gravity sector described by a flat Robertson-Walker m... |
1503.07070 | Seyed Hossein Hendi Dr. | S. H. Hendi and Z. Armanfard | Extended phase space thermodynamics and $P-V$ criticality of charged
black holes in Brans-Dicke theory | 9 pages and 18 figures | Gen. Relativ. Gravit. 47 (2015) 125 | 10.1007/s10714-015-1965-6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, taking in to account Brans-Dick theory, we investigate
thermodynamic behavior of charged black hole solutions. We study the analogy of
the black hole solution with the Van der Waals liquid-gas system in the
extended phase space by considering the cosmological constant as dynamical
pressure. We obtain c... | [
{
"created": "Mon, 23 Mar 2015 17:03:03 GMT",
"version": "v1"
}
] | 2015-11-25 | [
[
"Hendi",
"S. H.",
""
],
[
"Armanfard",
"Z.",
""
]
] | In this paper, taking in to account Brans-Dick theory, we investigate thermodynamic behavior of charged black hole solutions. We study the analogy of the black hole solution with the Van der Waals liquid-gas system in the extended phase space by considering the cosmological constant as dynamical pressure. We obtain cri... |
2309.03236 | Ghulam Abbas | G. Abbas and H. Rehman | Analysis of accretion disk around the Euler-Heisenberg Anti-de Sitter
Black Hole | 19 Pages, 24 Eps figures, Accepted for publication in Fortschritte
der Physik - Progress of Physics | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We demonstrate the investigation of thin accretion disc surrounding the
Einstein- Euler-Heisenberg-Anti-de Sitter black hole. Additionally, we analyze
the black hole event horizons and compute their effective potential and
equations of motion. The specific energy, specific angular momentum, and
specific angular veloc... | [
{
"created": "Wed, 6 Sep 2023 02:08:22 GMT",
"version": "v1"
}
] | 2023-09-08 | [
[
"Abbas",
"G.",
""
],
[
"Rehman",
"H.",
""
]
] | We demonstrate the investigation of thin accretion disc surrounding the Einstein- Euler-Heisenberg-Anti-de Sitter black hole. Additionally, we analyze the black hole event horizons and compute their effective potential and equations of motion. The specific energy, specific angular momentum, and specific angular velocit... |
1106.1367 | Hakan Andreasson | H{\aa}kan Andr\'easson | The Einstein-Vlasov System/Kinetic Theory | Published version http://www.livingreviews.org/lrr-2011-4 | Living Rev.Rel.14:4,2011 | 10.12942/lrr-2011-4 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main purpose of this article is to provide a guide to theorems on global
properties of solutions to the Einstein--Vlasov system. This system couples
Einstein's equations to a kinetic matter model. Kinetic theory has been an
important field of research during several decades in which the main focus has
been on non... | [
{
"created": "Tue, 7 Jun 2011 14:53:36 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Andréasson",
"Håkan",
""
]
] | The main purpose of this article is to provide a guide to theorems on global properties of solutions to the Einstein--Vlasov system. This system couples Einstein's equations to a kinetic matter model. Kinetic theory has been an important field of research during several decades in which the main focus has been on non-r... |
gr-qc/9807072 | Claus Laemmerzahl | Claus L\"ammerzahl | Minimal Coupling and the Equivalence Principle in Quantum Mechanics | 14 pages, LaTex, appeared in Acta Physica Polonica 29, 1057 (1998);
Presented at the workshop on Gauge Theories of Gravitation, Jadwisin, Poland,
September 4 -- 10, 1997 | Acta Phys.Polon. 29 (1998) 1057 | null | null | gr-qc | null | The role of the Equivalence Principle (EP) in classical and quantum mechanics
is reviewed. It is shown that the weak EP has a counterpart in quantum theory,
a Quantum Equivalence Principle (QEP). This implies that also in the quantum
domain the geometrisation of the gravitational interaction is an operational
procedu... | [
{
"created": "Tue, 28 Jul 1998 08:41:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lämmerzahl",
"Claus",
""
]
] | The role of the Equivalence Principle (EP) in classical and quantum mechanics is reviewed. It is shown that the weak EP has a counterpart in quantum theory, a Quantum Equivalence Principle (QEP). This implies that also in the quantum domain the geometrisation of the gravitational interaction is an operational procedure... |
1504.04008 | Ahmad Sheykhi | S. Ghaffari, A. Sheykhi, M. H. Dehghani | Statefinder diagnosis for holographic dark energy in the DGP braneworld | 14 pages | Phys Rev D 91 (2015) 023007 | 10.1103/PhysRevD.91.023007 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many dark energy (DE) models have been proposed, in recent years, to explain
acceleration of the Universe expansion. It seems necessary to discriminate the
various DE models in order to check the viability of each model. Statefinder
diagnostic is a useful method which can differentiate various DE models. In
this pape... | [
{
"created": "Wed, 15 Apr 2015 17:35:24 GMT",
"version": "v1"
}
] | 2015-04-17 | [
[
"Ghaffari",
"S.",
""
],
[
"Sheykhi",
"A.",
""
],
[
"Dehghani",
"M. H.",
""
]
] | Many dark energy (DE) models have been proposed, in recent years, to explain acceleration of the Universe expansion. It seems necessary to discriminate the various DE models in order to check the viability of each model. Statefinder diagnostic is a useful method which can differentiate various DE models. In this paper,... |
2106.12594 | Maximilian Dax | Maximilian Dax, Stephen R. Green, Jonathan Gair, Jakob H. Macke,
Alessandra Buonanno, Bernhard Sch\"olkopf | Real-time gravitational-wave science with neural posterior estimation | 7+12 pages, 4+11 figures. [v2]: Minor updates to match published
version, code available at https://github.com/dingo-gw/dingo | Phys.Rev.Lett. 127, 241103 (2021) | 10.1103/PhysRevLett.127.241103 | LIGO-P2100223 | gr-qc astro-ph.IM cs.LG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate unprecedented accuracy for rapid gravitational-wave parameter
estimation with deep learning. Using neural networks as surrogates for Bayesian
posterior distributions, we analyze eight gravitational-wave events from the
first LIGO-Virgo Gravitational-Wave Transient Catalog and find very close
quantitati... | [
{
"created": "Wed, 23 Jun 2021 18:00:05 GMT",
"version": "v1"
},
{
"created": "Tue, 30 May 2023 15:05:17 GMT",
"version": "v2"
}
] | 2023-05-31 | [
[
"Dax",
"Maximilian",
""
],
[
"Green",
"Stephen R.",
""
],
[
"Gair",
"Jonathan",
""
],
[
"Macke",
"Jakob H.",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Schölkopf",
"Bernhard",
""
]
] | We demonstrate unprecedented accuracy for rapid gravitational-wave parameter estimation with deep learning. Using neural networks as surrogates for Bayesian posterior distributions, we analyze eight gravitational-wave events from the first LIGO-Virgo Gravitational-Wave Transient Catalog and find very close quantitative... |
0806.1399 | Iver Brevik | I. Brevik and O. Gorbunova | Viscous Dark Cosmology with Account of Quantum Effects | 10 pages, no figures; to appear in Eur. Phys. J. C | Eur.Phys.J.C56:425-428,2008 | 10.1140/epjc/s10052-008-0664-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The analytic properties of the energy density rho(t) of the cosmic fluid, and
the Hubble parameter H(t), are investigated near to the future singularity
t=t_s assuming different forms for the equation of state. First, it is shown
that the inclusion of quantum effects coming from the conformal anomaly
modifies the sin... | [
{
"created": "Mon, 9 Jun 2008 08:34:25 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Brevik",
"I.",
""
],
[
"Gorbunova",
"O.",
""
]
] | The analytic properties of the energy density rho(t) of the cosmic fluid, and the Hubble parameter H(t), are investigated near to the future singularity t=t_s assuming different forms for the equation of state. First, it is shown that the inclusion of quantum effects coming from the conformal anomaly modifies the singu... |
1403.7036 | Simon Garruto | L. Fatibene, S. Garruto | Extended Gravity | null | null | 10.1142/S0219887814600184 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We shall show equivalence between Palatini-$f(\calR)$ theories and
Brans-Dicke (BD) theories at the level of action principles in generic
dimension with generic matter coupling. We do that by introducing the Helmholtz
Lagrangian associated to Palatini-$f(\calR)$ theory and then performing frame
transformations in ord... | [
{
"created": "Thu, 27 Mar 2014 14:05:15 GMT",
"version": "v1"
}
] | 2014-09-29 | [
[
"Fatibene",
"L.",
""
],
[
"Garruto",
"S.",
""
]
] | We shall show equivalence between Palatini-$f(\calR)$ theories and Brans-Dicke (BD) theories at the level of action principles in generic dimension with generic matter coupling. We do that by introducing the Helmholtz Lagrangian associated to Palatini-$f(\calR)$ theory and then performing frame transformations in order... |
2305.01803 | Wolfgang Wieland | Wolfgang Wieland | Simplicial Graviton from Selfdual Ashtekar Variables | 21 pages, three figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In perturbative gravity, it is straight-forward to characterize the two local
degrees of freedom of the gravitational field in terms of a mode expansion of
the linearized perturbation. In the non-perturbative regime, we are in a more
difficult position. It is not at all obvious how to construct Dirac observables
that... | [
{
"created": "Tue, 2 May 2023 22:06:09 GMT",
"version": "v1"
}
] | 2023-05-04 | [
[
"Wieland",
"Wolfgang",
""
]
] | In perturbative gravity, it is straight-forward to characterize the two local degrees of freedom of the gravitational field in terms of a mode expansion of the linearized perturbation. In the non-perturbative regime, we are in a more difficult position. It is not at all obvious how to construct Dirac observables that c... |
1909.13390 | Jibril Ben Achour | Jibril Ben Achour and Etera R. Livine | Cosmology as a CFT$_1$ | 44 pages, minor modifications in the introduction and discussion, as
well as additional references. This version matches the one accepted in JHEP | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the simplest FLRW cosmological system consisting in the
homogeneous and isotropic massless Einstein-Scalar system enjoys a hidden
conformal symmetry under the 1D conformal group $SL(2,\mathbb{R})$ acting as
Mobius transformations in proper time. This invariance is made explicit through
the mapping of FLR... | [
{
"created": "Sun, 29 Sep 2019 22:34:54 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Nov 2019 19:00:25 GMT",
"version": "v2"
}
] | 2019-11-20 | [
[
"Achour",
"Jibril Ben",
""
],
[
"Livine",
"Etera R.",
""
]
] | We show that the simplest FLRW cosmological system consisting in the homogeneous and isotropic massless Einstein-Scalar system enjoys a hidden conformal symmetry under the 1D conformal group $SL(2,\mathbb{R})$ acting as Mobius transformations in proper time. This invariance is made explicit through the mapping of FLRW ... |
1403.0337 | Vee-Liem Saw | Vee-Liem Saw | A rotating universe outside a Schwarzschild black hole where spacetime
itself non-uniformly rotates | 17 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a non-uniformly rotating universe outside a Schwarzschild black hole
by generating a time-dependent manifold of revolution around a straight line.
In this simple model where layers of spherical shells of the universe
non-uniformly rotate, the Einstein field equations require this phenomenon to
be caused by a... | [
{
"created": "Mon, 3 Mar 2014 08:33:47 GMT",
"version": "v1"
}
] | 2014-03-04 | [
[
"Saw",
"Vee-Liem",
""
]
] | We study a non-uniformly rotating universe outside a Schwarzschild black hole by generating a time-dependent manifold of revolution around a straight line. In this simple model where layers of spherical shells of the universe non-uniformly rotate, the Einstein field equations require this phenomenon to be caused by a s... |
1107.3388 | Alexander Zhuk | Alexey Chopovsky, Maxim Eingorn and Alexander Zhuk | Weak-field limit of Kaluza-Klein models with spherical compactification:
experimental constraints | 8 pages, no figures, revised version, equations and references added,
accepted for publication in Phys. Rev. D. arXiv admin note: significant text
overlap with arXiv:1107.3387 | Phys.Rev.D85:064028,2012 | 10.1103/PhysRevD.85.064028 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the classical gravitational tests for the six-dimensional
Kaluza-Klein model with spherical (of a radius $a$) compactification of the
internal space. The model contains also a bare multidimensional cosmological
constant $\Lambda_6$. The matter, which corresponds to this ansatz, can be
simulated by a pe... | [
{
"created": "Mon, 18 Jul 2011 09:50:44 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Nov 2011 21:02:48 GMT",
"version": "v2"
},
{
"created": "Thu, 9 Feb 2012 17:25:57 GMT",
"version": "v3"
}
] | 2013-10-22 | [
[
"Chopovsky",
"Alexey",
""
],
[
"Eingorn",
"Maxim",
""
],
[
"Zhuk",
"Alexander",
""
]
] | We investigate the classical gravitational tests for the six-dimensional Kaluza-Klein model with spherical (of a radius $a$) compactification of the internal space. The model contains also a bare multidimensional cosmological constant $\Lambda_6$. The matter, which corresponds to this ansatz, can be simulated by a perf... |
2003.10498 | Nan Jiang | Nan Jiang and Kent Yagi | Analytic I-Love-C relations for realistic neutron stars | Corrections on Fig.1 and Fig.2, in which the correct curve
corresponding to constant density case(Love-C panel) replaced the wrong one | Phys. Rev. D 101, 124006 (2020) | 10.1103/PhysRevD.101.124006 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent observations of neutron stars (NS) with radio, X-rays and
gravitational waves have begun to constrain the equation of state (EoS) for
nuclear matter beyond the nuclear saturation density. To one's surprise, there
exist approximate universal relations connecting certain bulk properties of NSs
that are insensiti... | [
{
"created": "Mon, 23 Mar 2020 19:13:53 GMT",
"version": "v1"
},
{
"created": "Sat, 23 May 2020 00:48:23 GMT",
"version": "v2"
},
{
"created": "Tue, 26 May 2020 03:55:40 GMT",
"version": "v3"
},
{
"created": "Thu, 24 Sep 2020 23:39:26 GMT",
"version": "v4"
}
] | 2020-09-28 | [
[
"Jiang",
"Nan",
""
],
[
"Yagi",
"Kent",
""
]
] | Recent observations of neutron stars (NS) with radio, X-rays and gravitational waves have begun to constrain the equation of state (EoS) for nuclear matter beyond the nuclear saturation density. To one's surprise, there exist approximate universal relations connecting certain bulk properties of NSs that are insensitive... |
1902.04776 | Mehdi Rezaei | Mehdi Rezaei | Observational constraints on the oscillating dark energy cosmologies | 10 pages, 4 figures, Accepted in MNRAS | Monthly Notices of the Royal Astronomical Society, 485-1, 550,
2019 | 10.1093/mnras/stz394 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study we combine the background and the growth rate data in order to
study the ability of the two oscillating dark energy parameterizations, to fit
the observational data. Using the likelihood and MCMC method we try to explore
the posterior space and put constraints on the free parameters of the models.
Based... | [
{
"created": "Wed, 13 Feb 2019 07:51:08 GMT",
"version": "v1"
}
] | 2019-05-07 | [
[
"Rezaei",
"Mehdi",
""
]
] | In this study we combine the background and the growth rate data in order to study the ability of the two oscillating dark energy parameterizations, to fit the observational data. Using the likelihood and MCMC method we try to explore the posterior space and put constraints on the free parameters of the models. Based o... |
1801.10412 | Nafiseh Rahmanpour | Nafiseh Rahmanpour, Nima Khosravi and Babak Vakili | SO(4; 2) and derivatively coupled dRGT massive gravity | 12 pages | Journal of Geometry and Physics 135 (2019) 106-115 | 10.1016/j.geomphys.2018.09.012 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the possibility of assigning a geometric structure to
the Lie groups. It is shown the Poincar\'{e} and Weyl groups have geometrical
structure of the Riemann-Cartan and Weyl space-time respectively. The geometric
approach to these groups can be carried out by considering the most general
(non)me... | [
{
"created": "Wed, 31 Jan 2018 11:46:27 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Oct 2018 14:22:14 GMT",
"version": "v2"
}
] | 2018-11-14 | [
[
"Rahmanpour",
"Nafiseh",
""
],
[
"Khosravi",
"Nima",
""
],
[
"Vakili",
"Babak",
""
]
] | In this paper we study the possibility of assigning a geometric structure to the Lie groups. It is shown the Poincar\'{e} and Weyl groups have geometrical structure of the Riemann-Cartan and Weyl space-time respectively. The geometric approach to these groups can be carried out by considering the most general (non)metr... |
2305.12965 | Francesco Sannino | A. D'Alise, G. Fabiano, D. Frattulillo, S. Hohenegger, D. Iacobacci,
F. Pezzella, F. Sannino | Positivity Conditions for Generalised Schwarzschild Space-Times | LaTeX, 40 pages, 9 figures | null | null | LYCEN 2023-01 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We analyse the impact of positivity conditions on static spherically
symmetric deformations of the Schwarzschild space-time. The metric is taken to
satisfy, at least asymptotically, the Einstein equation in the presence of a
non-trivial stress-energy tensor, on which we impose various physicality
conditions. We syste... | [
{
"created": "Mon, 22 May 2023 12:14:32 GMT",
"version": "v1"
}
] | 2023-05-23 | [
[
"D'Alise",
"A.",
""
],
[
"Fabiano",
"G.",
""
],
[
"Frattulillo",
"D.",
""
],
[
"Hohenegger",
"S.",
""
],
[
"Iacobacci",
"D.",
""
],
[
"Pezzella",
"F.",
""
],
[
"Sannino",
"F.",
""
]
] | We analyse the impact of positivity conditions on static spherically symmetric deformations of the Schwarzschild space-time. The metric is taken to satisfy, at least asymptotically, the Einstein equation in the presence of a non-trivial stress-energy tensor, on which we impose various physicality conditions. We systema... |
gr-qc/9306024 | Viqar Husain | Viqar Husain | Faraday lines and observables for the Einstein-Maxwell theory | 8 pages, Alberta-Thy-30-93 (RevTeX) | Class.Quant.Grav.10:L233-L238,1993 | 10.1088/0264-9381/10/12/004 | null | gr-qc hep-th | null | In recent work on Einstein gravity in four dimensions using the Ashtekar
variables, non-local loop variables have played an important role in attempts
to formulate a quantum theory. The introduction of such variables is guided by
gauge invariance, and here an infinite set of loop variables is introduced for
the Hamil... | [
{
"created": "Fri, 18 Jun 1993 16:55:54 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Husain",
"Viqar",
""
]
] | In recent work on Einstein gravity in four dimensions using the Ashtekar variables, non-local loop variables have played an important role in attempts to formulate a quantum theory. The introduction of such variables is guided by gauge invariance, and here an infinite set of loop variables is introduced for the Hamilto... |
gr-qc/9803043 | J. Fernando Barbero G. | J. Fernando Barbero G., Alfredo Tiemblo, and Romualdo Treseguerres | The Husain-Kuchar Model: Time Variables and Non-degenerate Metrics | LaTeX, 22 pages, accepted for publication in Phys. Rev. D | Phys.Rev.D57:6104-6112,1998 | 10.1103/PhysRevD.57.6104 | IMAFF98/03 | gr-qc | null | We study the Husain-Kuchar model by introducing a new action principle
similar to the self-dual action used in the Ashtekar variables approach to
Quantum Gravity. This new action has several interesting features; among them,
the presence of a scalar time variable that allows the definition of geometric
observables wi... | [
{
"created": "Thu, 12 Mar 1998 15:41:03 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"G.",
"J. Fernando Barbero",
""
],
[
"Tiemblo",
"Alfredo",
""
],
[
"Treseguerres",
"Romualdo",
""
]
] | We study the Husain-Kuchar model by introducing a new action principle similar to the self-dual action used in the Ashtekar variables approach to Quantum Gravity. This new action has several interesting features; among them, the presence of a scalar time variable that allows the definition of geometric observables with... |
gr-qc/9506041 | Gary Horowitz | Douglas Eardley, Gary Horowitz, David Kastor, Jennie Traschen | Breaking Cosmic Strings without Monopoles | 9 pages, no figures; one statement corrected and references added | Phys.Rev.Lett.75:3390-3393,1995 | 10.1103/PhysRevLett.75.3390 | NSF-ITP-95-48, UCSBTH-95-13, UMHEP-420 | gr-qc astro-ph hep-th | null | It is shown that topologically stable cosmic strings can, in fact, appear to
end or to break, even in theories without monopoles. This can occur whenever
the spatial topology of the universe is nontrivial. For the case of
Abelian-Higgs strings, we describe the gauge and scalar field configurations
necessary for a str... | [
{
"created": "Tue, 20 Jun 1995 22:23:44 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jun 1995 21:31:44 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Eardley",
"Douglas",
""
],
[
"Horowitz",
"Gary",
""
],
[
"Kastor",
"David",
""
],
[
"Traschen",
"Jennie",
""
]
] | It is shown that topologically stable cosmic strings can, in fact, appear to end or to break, even in theories without monopoles. This can occur whenever the spatial topology of the universe is nontrivial. For the case of Abelian-Higgs strings, we describe the gauge and scalar field configurations necessary for a strin... |
2305.03028 | Xiang-Qian Li | Xiang-Qian Li, Hao-Peng Yan, Li-Li Xing, Shi-Wei Zhou | Critical behavior of AdS black holes surrounded by dark fluid with
Chaplygin-like equation of state | 19 pages, 12 figures. PRD accepted version. arXiv admin note: text
overlap with arXiv:2012.13271, arXiv:1407.0011 by other authors | null | 10.1103/PhysRevD.107.104055 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Supposing the existence of Dark Fluid with a Chaplygin-like equation of state
$p=-B/\rho$ (CDF) as a cosmic background, we obtain a static
spherically-symmetric black hole (BH) solution to the Einstein gravitational
equations. We study the $P-V$ critical behavior of AdS BH surrounded by the CDF
in the extended phase ... | [
{
"created": "Thu, 4 May 2023 17:53:11 GMT",
"version": "v1"
}
] | 2023-06-07 | [
[
"Li",
"Xiang-Qian",
""
],
[
"Yan",
"Hao-Peng",
""
],
[
"Xing",
"Li-Li",
""
],
[
"Zhou",
"Shi-Wei",
""
]
] | Supposing the existence of Dark Fluid with a Chaplygin-like equation of state $p=-B/\rho$ (CDF) as a cosmic background, we obtain a static spherically-symmetric black hole (BH) solution to the Einstein gravitational equations. We study the $P-V$ critical behavior of AdS BH surrounded by the CDF in the extended phase sp... |
gr-qc/9906047 | Takeshi Shimomura | Takeshi Shimomura and Shinji Mukohyama | Does the generalized second law require entropy bounds for a charged
system? | 18pages, RevTex, no figures | Phys.Rev. D61 (2000) 064020 | 10.1103/PhysRevD.61.064020 | null | gr-qc | null | We calculate the net change in generalized entropy occurring when one carries
out the gedanken experiment in which a box initially containing energy $E$,
entropy $S$ and charge $Q$ is lowered adiabatically toward a
Reissner-Nordstr\"{o}m black hole and then dropped in. This is an extension of
the work of Unruh-Wald t... | [
{
"created": "Tue, 15 Jun 1999 06:35:19 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Shimomura",
"Takeshi",
""
],
[
"Mukohyama",
"Shinji",
""
]
] | We calculate the net change in generalized entropy occurring when one carries out the gedanken experiment in which a box initially containing energy $E$, entropy $S$ and charge $Q$ is lowered adiabatically toward a Reissner-Nordstr\"{o}m black hole and then dropped in. This is an extension of the work of Unruh-Wald to ... |
1011.4705 | Francesca Vidotto | Francesca Vidotto | Spinfoam Cosmology: quantum cosmology from the full theory | 4 pages, jpconf.cls, to appear in the Proceedings of Spanish
Relativity Meeting 2010 (ERE2010), Granada, Spain | null | 10.1088/1742-6596/314/1/012049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum cosmology is usually studied quantizing symmetry-reduced variables.
Is it possible, instead, to define quantum cosmology starting from the full
quantum gravity theory? In Loop Quantum Gravity (LQG), it is possible to cut
the degrees of freedom in a suitable way, in order to define a cosmological
model. Such a... | [
{
"created": "Sun, 21 Nov 2010 22:20:18 GMT",
"version": "v1"
}
] | 2011-10-18 | [
[
"Vidotto",
"Francesca",
""
]
] | Quantum cosmology is usually studied quantizing symmetry-reduced variables. Is it possible, instead, to define quantum cosmology starting from the full quantum gravity theory? In Loop Quantum Gravity (LQG), it is possible to cut the degrees of freedom in a suitable way, in order to define a cosmological model. Such a m... |
2211.15695 | Meng-Zhi Wu | Meng-Zhi Wu, Marko Toro\v{s}, Sougato Bose, Anupam Mazumdar | Quantum Gravitational Sensor for Space Debris | 13 pages, 8 figures | Phys. Rev. D 107, 104053 (2023) | 10.1103/PhysRevD.107.104053 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Matter-wave interferometers have fundamental applications for gravity
experiments such as testing the equivalence principle and the quantum nature of
gravity. In addition, matter-wave interferometers can be used as quantum
sensors to measure the local gravitational acceleration caused by external
massive moving objec... | [
{
"created": "Mon, 28 Nov 2022 19:00:03 GMT",
"version": "v1"
},
{
"created": "Sun, 28 May 2023 14:58:35 GMT",
"version": "v2"
}
] | 2023-05-30 | [
[
"Wu",
"Meng-Zhi",
""
],
[
"Toroš",
"Marko",
""
],
[
"Bose",
"Sougato",
""
],
[
"Mazumdar",
"Anupam",
""
]
] | Matter-wave interferometers have fundamental applications for gravity experiments such as testing the equivalence principle and the quantum nature of gravity. In addition, matter-wave interferometers can be used as quantum sensors to measure the local gravitational acceleration caused by external massive moving objects... |
2012.11844 | Xiao-Mei Kuang | Hong Guo, Xiao-Mei Kuang, Eleftherios Papantonopoulos, Bin Wang | Horizon curvature and spacetime structure influences on black hole
scalarization | 20 pages; references added; version accepted in EPJC | null | 10.1140/epjc/s10052-021-09630-7 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Black hole spontaneous scalarization has been attracting more and more
attention as it circumvents the well-known no-hair theorems. In this work, we
study the scalarization in Einstein-scalar-Gauss-Bonnet theory with a probe
scalar field in a black hole background with different curvatures. We first
probe the signal ... | [
{
"created": "Tue, 22 Dec 2020 05:59:40 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jan 2021 05:58:26 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Sep 2021 13:42:23 GMT",
"version": "v3"
}
] | 2021-10-04 | [
[
"Guo",
"Hong",
""
],
[
"Kuang",
"Xiao-Mei",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Wang",
"Bin",
""
]
] | Black hole spontaneous scalarization has been attracting more and more attention as it circumvents the well-known no-hair theorems. In this work, we study the scalarization in Einstein-scalar-Gauss-Bonnet theory with a probe scalar field in a black hole background with different curvatures. We first probe the signal of... |
1508.02357 | Samantha Usman | Samantha A. Usman, Alexander H. Nitz, Ian W. Harry, Christopher M.
Biwer, Duncan A. Brown, Miriam Cabero, Collin D. Capano, Tito Dal Canton,
Thomas Dent, Stephen Fairhurst, Marcel S. Kehl, Drew Keppel, Badri Krishnan,
Amber Lenon, Andrew Lundgren, Alex B. Nielsen, Larne P. Pekowsky, Harald P.
Pfeiffer, Peter R.... | The PyCBC search for gravitational waves from compact binary coalescence | 29 pages, 7 figures, accepted by Classical and Quantum Gravity | null | 10.1088/0264-9381/33/21/215004 | LIGO-P1500086 | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe the PyCBC search for gravitational waves from compact-object
binary coalescences in advanced gravitational-wave detector data. The search
was used in the first Advanced LIGO observing run and unambiguously identified
two black hole binary mergers, GW150914 and GW151226. At its core, the PyCBC
search perfo... | [
{
"created": "Mon, 10 Aug 2015 19:07:10 GMT",
"version": "v1"
},
{
"created": "Sat, 14 May 2016 17:31:30 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Sep 2016 13:54:17 GMT",
"version": "v3"
}
] | 2016-10-19 | [
[
"Usman",
"Samantha A.",
""
],
[
"Nitz",
"Alexander H.",
""
],
[
"Harry",
"Ian W.",
""
],
[
"Biwer",
"Christopher M.",
""
],
[
"Brown",
"Duncan A.",
""
],
[
"Cabero",
"Miriam",
""
],
[
"Capano",
"Collin D.",
... | We describe the PyCBC search for gravitational waves from compact-object binary coalescences in advanced gravitational-wave detector data. The search was used in the first Advanced LIGO observing run and unambiguously identified two black hole binary mergers, GW150914 and GW151226. At its core, the PyCBC search perform... |
2206.01390 | Yun Soo Myung | Yun Soo Myung | Superradiant instability of dyonic Reissner-Nordstrom black holes | 22 pages, 8 figures, version to appear in EPJC | null | 10.1140/epjc/s10052-022-10911-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the superradiant instability of dyonic Reissner-Nordstr\"{o}m
(dRN) black holes with two charges under a charged massive scalar perturbation.
Two conditions for possessing a trapping well are obtained from analyzing
asymptotic scalar potential and far-region wave functions. It is clear that the
superra... | [
{
"created": "Fri, 3 Jun 2022 04:38:10 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Oct 2022 22:20:23 GMT",
"version": "v2"
}
] | 2022-11-09 | [
[
"Myung",
"Yun Soo",
""
]
] | We investigate the superradiant instability of dyonic Reissner-Nordstr\"{o}m (dRN) black holes with two charges under a charged massive scalar perturbation. Two conditions for possessing a trapping well are obtained from analyzing asymptotic scalar potential and far-region wave functions. It is clear that the superradi... |
1511.08566 | Pui Tang Leung | T. K. Chan, AtMa P. O. Chan and P. T. Leung | Universality and stationarity of the I-Love relation for self-bound
stars | 23 pages, 7 figures, submitted to Physical Review D | Phys. Rev. D 93, 024033 (2016) | 10.1103/PhysRevD.93.024033 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The emergence of the I-Love-Q relations, revealing that the moment of
inertia, the tidal Love number (deformability) and the spin-induced quadrupole
moment of compact stars are, to high accuracy, interconnected in a universal
way disregarding the wide variety of equations of state (EOSs) of dense matter,
has attracte... | [
{
"created": "Fri, 27 Nov 2015 06:18:21 GMT",
"version": "v1"
}
] | 2016-01-27 | [
[
"Chan",
"T. K.",
""
],
[
"Chan",
"AtMa P. O.",
""
],
[
"Leung",
"P. T.",
""
]
] | The emergence of the I-Love-Q relations, revealing that the moment of inertia, the tidal Love number (deformability) and the spin-induced quadrupole moment of compact stars are, to high accuracy, interconnected in a universal way disregarding the wide variety of equations of state (EOSs) of dense matter, has attracted ... |
1308.4044 | Jean-Philippe Bruneton | Jean-Philippe Bruneton | Notes on several phenomenological laws of quantum gravity | 15 pages, 4 figures. Comments welcome | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Phenomenological approaches to quantum gravity try to infer model-independent
laws by analyzing thought experiments and combining both quantum, relativistic,
and gravitational ingredients. We first review these ingredients -three basic
inequalities- and discuss their relationships with the nature of fundamental
const... | [
{
"created": "Mon, 19 Aug 2013 14:52:38 GMT",
"version": "v1"
}
] | 2013-08-21 | [
[
"Bruneton",
"Jean-Philippe",
""
]
] | Phenomenological approaches to quantum gravity try to infer model-independent laws by analyzing thought experiments and combining both quantum, relativistic, and gravitational ingredients. We first review these ingredients -three basic inequalities- and discuss their relationships with the nature of fundamental constan... |
1601.06407 | Sharmanthie Fernando | Sharmanthie Fernando | Quasinormal modes of dilaton-de Sitter black holes: scalar perturbations | 21 pages, 8 figures, Accepted to be published in General Relativity
and Gravitation | Gen.Rel.Grav. 48 (2016) no.3, 24 | 10.1007/s10714-016-2020-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dilaton black hole solutions in low energy string theory (well known as GMGHS
black holes) have analogue black holes with a cosmological constant derived by
Gao and Zhang. Here, we study quasi normal modes of this dilaton-de Sitter
black hole under neutral scalar field perturbations. We have employed the sixth
order ... | [
{
"created": "Sun, 24 Jan 2016 17:17:20 GMT",
"version": "v1"
}
] | 2016-05-20 | [
[
"Fernando",
"Sharmanthie",
""
]
] | Dilaton black hole solutions in low energy string theory (well known as GMGHS black holes) have analogue black holes with a cosmological constant derived by Gao and Zhang. Here, we study quasi normal modes of this dilaton-de Sitter black hole under neutral scalar field perturbations. We have employed the sixth order WK... |
1311.6483 | Miguel Zilhao | Miguel Zilh\~ao, Vitor Cardoso, Carlos Herdeiro, Luis Lehner, Ulrich
Sperhake | Collisions of oppositely charged black holes | 11 pages, 4 figures. Matches version to appear in PRD | Phys. Rev. D 89, 044008 (2014) | 10.1103/PhysRevD.89.044008 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The first fully non-linear numerical simulations of colliding charged black
holes in D=4 Einstein-Maxwell theory were recently reported arXiv:1205.1063.
These collisions were performed for black holes with equal charge-to-mass
ratio, for which initial data can be found in closed analytic form. Here we
generalize the ... | [
{
"created": "Mon, 25 Nov 2013 21:16:41 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Feb 2014 20:28:39 GMT",
"version": "v2"
}
] | 2014-02-19 | [
[
"Zilhão",
"Miguel",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Herdeiro",
"Carlos",
""
],
[
"Lehner",
"Luis",
""
],
[
"Sperhake",
"Ulrich",
""
]
] | The first fully non-linear numerical simulations of colliding charged black holes in D=4 Einstein-Maxwell theory were recently reported arXiv:1205.1063. These collisions were performed for black holes with equal charge-to-mass ratio, for which initial data can be found in closed analytic form. Here we generalize the st... |
2206.02301 | Kangjae Lee | Kangjae Lee, Tetsuya Shiromizu, Keisuke Izumi, Hirotaka Yoshino,
Yoshimune Tomikawa | Four types of attractive gravity probe surfaces | 25 pages, 2 figures | null | 10.1103/PhysRevD.106.064028 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reexamine the concept of the attractive gravity probe surface recently
proposed as an indicator for strength of gravity. Then, we propose three new
variant concepts and show refined inequalities for the four types of the AGPSs
by taking account of the angular momentum, gravitational waves and matters.
| [
{
"created": "Mon, 6 Jun 2022 01:00:12 GMT",
"version": "v1"
}
] | 2022-10-05 | [
[
"Lee",
"Kangjae",
""
],
[
"Shiromizu",
"Tetsuya",
""
],
[
"Izumi",
"Keisuke",
""
],
[
"Yoshino",
"Hirotaka",
""
],
[
"Tomikawa",
"Yoshimune",
""
]
] | We reexamine the concept of the attractive gravity probe surface recently proposed as an indicator for strength of gravity. Then, we propose three new variant concepts and show refined inequalities for the four types of the AGPSs by taking account of the angular momentum, gravitational waves and matters. |
2210.14288 | Maria De F\'atima Alves da Silva PhD | A. C. Mesquita and M. F. A. da Silva | Radiant gravitational collapse with anisotropy in pressures and bulk
viscosity | 35 pages, 19 figures | null | 10.1007/s10714-023-03098-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We model a compact radiant star that undergoes gravitational collapse from a
certain initial static configuration until it becomes a black hole. The star
consists of a fluid with anisotropy in pressures, bulk viscosity, in addition
to the radial heat flow. A solution of Einstein's field equations with temporal
depend... | [
{
"created": "Tue, 25 Oct 2022 19:20:00 GMT",
"version": "v1"
}
] | 2023-04-26 | [
[
"Mesquita",
"A. C.",
""
],
[
"da Silva",
"M. F. A.",
""
]
] | We model a compact radiant star that undergoes gravitational collapse from a certain initial static configuration until it becomes a black hole. The star consists of a fluid with anisotropy in pressures, bulk viscosity, in addition to the radial heat flow. A solution of Einstein's field equations with temporal dependen... |
1301.7068 | Oscar J. C. Dias | Oscar J.C. Dias, Harvey S. Reall | Algebraically special perturbations of the Schwarzschild solution in
higher dimensions | 23 pages, no figures. v2: references added; discussion improved;
matches published version | null | 10.1088/0264-9381/30/9/095003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study algebraically special perturbations of a generalized Schwarzschild
solution in any number of dimensions. There are two motivations. First, to
learn whether there exist interesting higher-dimensional algebraically special
solutions beyond the known ones. Second, algebraically special perturbations
present an ... | [
{
"created": "Tue, 29 Jan 2013 21:00:04 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Mar 2013 16:20:56 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Dias",
"Oscar J. C.",
""
],
[
"Reall",
"Harvey S.",
""
]
] | We study algebraically special perturbations of a generalized Schwarzschild solution in any number of dimensions. There are two motivations. First, to learn whether there exist interesting higher-dimensional algebraically special solutions beyond the known ones. Second, algebraically special perturbations present an ob... |
2102.09601 | Giovanni Manfredi | Giovanni Manfredi | Is the cosmological constant an eigenvalue? | null | Gen Relativ Gravit 53, 31 (2021) | 10.1007/s10714-021-02800-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose to reinterpret Einstein's field equations as a nonlinear
eigenvalue problem, where the cosmological constant $\Lambda$ plays the role of
the (smallest) eigenvalue. This interpretation is fully worked out for a simple
model of scalar gravity. The essential ingredient for the feasibility of this
approach is ... | [
{
"created": "Wed, 17 Feb 2021 16:15:05 GMT",
"version": "v1"
}
] | 2021-03-12 | [
[
"Manfredi",
"Giovanni",
""
]
] | We propose to reinterpret Einstein's field equations as a nonlinear eigenvalue problem, where the cosmological constant $\Lambda$ plays the role of the (smallest) eigenvalue. This interpretation is fully worked out for a simple model of scalar gravity. The essential ingredient for the feasibility of this approach is th... |
1512.03033 | Jaume Haro | Jaume Haro and Supriya Pan | Bulk viscous quintessential inflation | Version accepted for publication in IJMPD | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The incorporation of bulk viscosity process to General Relativity leads to
the appearance of nonsingular backgrounds that, at early and late times, depict
an accelerated universe. These backgrounds could be analytically calculated and
mimicked, in the context of General Relativity, by a single scalar field whose
pote... | [
{
"created": "Wed, 9 Dec 2015 20:37:06 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Dec 2017 08:54:22 GMT",
"version": "v2"
}
] | 2017-12-20 | [
[
"Haro",
"Jaume",
""
],
[
"Pan",
"Supriya",
""
]
] | The incorporation of bulk viscosity process to General Relativity leads to the appearance of nonsingular backgrounds that, at early and late times, depict an accelerated universe. These backgrounds could be analytically calculated and mimicked, in the context of General Relativity, by a single scalar field whose potent... |
2401.00047 | Alexander Grant | Alexander M. Grant | Persistent gravitational wave observables: Nonlinearities in
(non-)geodesic deviation | 16+1 pages; v2: corrected typos and added references; v3: matches
published version | Class. Quant. Grav. 41 175004 (2024) | 10.1088/1361-6382/ad48f5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The usual gravitational wave memory effect can be understood as a change in
the separation of two initially comoving observers due to a burst of
gravitational waves. Over the past few decades, a wide variety of other,
"persistent" observables which measure permanent effects on idealized detectors
have been introduced... | [
{
"created": "Fri, 29 Dec 2023 19:00:06 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Mar 2024 21:15:08 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Jul 2024 17:30:14 GMT",
"version": "v3"
}
] | 2024-07-30 | [
[
"Grant",
"Alexander M.",
""
]
] | The usual gravitational wave memory effect can be understood as a change in the separation of two initially comoving observers due to a burst of gravitational waves. Over the past few decades, a wide variety of other, "persistent" observables which measure permanent effects on idealized detectors have been introduced, ... |
gr-qc/0005029 | Yoshiyuki Morisawa | Yoshiyuki Morisawa, Kunihito Uzawa, Shinji Mukohyama | Excitation of Kaluza-Klein modes of U(1) field by parametric resonance | 6 pages | Phys.Rev. D62 (2000) 104019 | 10.1103/PhysRevD.62.104019 | YITP-00-25, KUCP0152 | gr-qc | null | In this paper, based on the theory of parametric resonance, we propose a
cosmological criterion on ways of compactification: we rule out such a model of
compactification that there exists a Kaluza-Klein mode satisfying
$2m_{KK}=\omega_b$, where $m_{KK}$ is mass of the Kaluza-Klein mode and
$\omega_b$ is the frequency... | [
{
"created": "Wed, 10 May 2000 13:32:48 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Morisawa",
"Yoshiyuki",
""
],
[
"Uzawa",
"Kunihito",
""
],
[
"Mukohyama",
"Shinji",
""
]
] | In this paper, based on the theory of parametric resonance, we propose a cosmological criterion on ways of compactification: we rule out such a model of compactification that there exists a Kaluza-Klein mode satisfying $2m_{KK}=\omega_b$, where $m_{KK}$ is mass of the Kaluza-Klein mode and $\omega_b$ is the frequency o... |
2108.09409 | Ya-Peng Hu | Xiao-Jun Gao, Ji-Ming Chen, Hongsheng Zhang, Yihao Yin and Ya-Peng Hu | Investigating strong gravitational lensing with black hole metrics
modified with an additional term | 13 pages, 6 figures, version accepted by PLB | null | 10.1016/j.physletb.2021.136683 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational lensing is one of the most impressive celestial phenomena,
which has interesting behaviors in its strong field limit. Near such limit,
Bozza finds that the deflection angle of light is well-approximated by a
logarithmic term and a constant term. In this way he explicitly derived the
analytic expressions... | [
{
"created": "Sat, 21 Aug 2021 00:59:00 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Sep 2021 15:27:09 GMT",
"version": "v2"
}
] | 2021-09-29 | [
[
"Gao",
"Xiao-Jun",
""
],
[
"Chen",
"Ji-Ming",
""
],
[
"Zhang",
"Hongsheng",
""
],
[
"Yin",
"Yihao",
""
],
[
"Hu",
"Ya-Peng",
""
]
] | Gravitational lensing is one of the most impressive celestial phenomena, which has interesting behaviors in its strong field limit. Near such limit, Bozza finds that the deflection angle of light is well-approximated by a logarithmic term and a constant term. In this way he explicitly derived the analytic expressions o... |
gr-qc/0304071 | Miguel Gustavo de Campos Batista | M. de Campos | Tensorial Perturbations in an Accelerating Universe | 10 pages, 2 figures | Gen.Rel.Grav.34:1393-1401,2002 | 10.1023/A:1020026818125 | null | gr-qc | null | We study tensorial perturbations (gravitational waves) in a universe with
particle production (OSC). The background of gravitational waves produces a
perturbation in the redshift observed from distant sources. The modes for the
perturbation in the redshift (induced redshift) are calculated in a universe
with particle... | [
{
"created": "Sun, 20 Apr 2003 23:52:34 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"de Campos",
"M.",
""
]
] | We study tensorial perturbations (gravitational waves) in a universe with particle production (OSC). The background of gravitational waves produces a perturbation in the redshift observed from distant sources. The modes for the perturbation in the redshift (induced redshift) are calculated in a universe with particle p... |
gr-qc/0601109 | Joan Josep Ferrando | Bartolom\'e Coll, Joan Josep Ferrando, Juan Antonio S\'aez | On the geometry of Killing and conformal tensors | 18 pages; v-3: minor changes | J.Math.Phys. 47 (2006) 062503 | 10.1063/1.2207717 | null | gr-qc | null | The second order Killing and conformal tensors are analyzed in terms of their
spectral decomposition, and some properties of the eigenvalues and the
eigenspaces are shown. When the tensor is of type I with only two different
eigenvalues, the condition to be a Killing or a conformal tensor is
characterized in terms of... | [
{
"created": "Thu, 26 Jan 2006 09:35:17 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Feb 2006 09:29:41 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Jul 2006 13:52:49 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Coll",
"Bartolomé",
""
],
[
"Ferrando",
"Joan Josep",
""
],
[
"Sáez",
"Juan Antonio",
""
]
] | The second order Killing and conformal tensors are analyzed in terms of their spectral decomposition, and some properties of the eigenvalues and the eigenspaces are shown. When the tensor is of type I with only two different eigenvalues, the condition to be a Killing or a conformal tensor is characterized in terms of i... |
0802.0688 | Marco Valerio Battisti | Marco Valerio Battisti, Giovanni Montani | Quantum cosmology with a minimal length | 8 pages, 3 figures; to appear in the proceedings of the II
Stueckelberg Workshop, Int.J.Mod.Phys.A, references added | Int.J.Mod.Phys.A23:1257-1265,2008 | 10.1142/S0217751X08040184 | null | gr-qc hep-th | null | Quantum cosmology in the presence of a fundamental minimal length is analyzed
in the context of the flat isotropic and the Taub cosmological models. Such
minimal scale comes out from a generalized uncertainty principle and the
quantization is performed in the minisuperspace representation. Both the
quantum Universes ... | [
{
"created": "Tue, 5 Feb 2008 18:08:29 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Feb 2008 13:46:25 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Battisti",
"Marco Valerio",
""
],
[
"Montani",
"Giovanni",
""
]
] | Quantum cosmology in the presence of a fundamental minimal length is analyzed in the context of the flat isotropic and the Taub cosmological models. Such minimal scale comes out from a generalized uncertainty principle and the quantization is performed in the minisuperspace representation. Both the quantum Universes ar... |
1502.03002 | Muhammad Zubair | M. Zubair, Saira Waheed | Energy conditions in $f(T)$ gravity with non-minimal torsion-matter
coupling | 20 pages, 10 figures, to appear in Astrophys. Space Sci | null | 10.1007/s10509-014-2181-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present paper examines the validity of energy bounds in a modified theory
of gravity involving non-minimal coupling of torsion scalar and perfect fluid
matter. In this respect, we formulate the general inequalities of energy
conditions by assuming the flat FRW universe. For the application of these
bounds, we par... | [
{
"created": "Mon, 9 Feb 2015 17:35:33 GMT",
"version": "v1"
}
] | 2015-02-11 | [
[
"Zubair",
"M.",
""
],
[
"Waheed",
"Saira",
""
]
] | The present paper examines the validity of energy bounds in a modified theory of gravity involving non-minimal coupling of torsion scalar and perfect fluid matter. In this respect, we formulate the general inequalities of energy conditions by assuming the flat FRW universe. For the application of these bounds, we parti... |
1012.2249 | Xiangyun Fu fu | Xiangyun Fu, Puxun Wu and Hongwei Yu | The growth factor of matter perturbations in an f(R) gravity | 15 pages, 5 figures | Eur.Phys.J.C68:271-276,2010 | 10.1140/epjc/s10052-010-1324-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The growth of matter perturbations in the $f(R)$ model proposed by
Starobinsky is studied in this paper. Three different parametric forms of the
growth index are considered respectively and constraints on the model are
obtained at both the $1\sigma$ and $2\sigma$ confidence levels, by using the
current observational ... | [
{
"created": "Fri, 10 Dec 2010 12:30:33 GMT",
"version": "v1"
}
] | 2011-01-05 | [
[
"Fu",
"Xiangyun",
""
],
[
"Wu",
"Puxun",
""
],
[
"Yu",
"Hongwei",
""
]
] | The growth of matter perturbations in the $f(R)$ model proposed by Starobinsky is studied in this paper. Three different parametric forms of the growth index are considered respectively and constraints on the model are obtained at both the $1\sigma$ and $2\sigma$ confidence levels, by using the current observational da... |
1012.3122 | Dag {\O}stvang | Dag {\O}stvang | Dark Matter Explanation from Quasi-Metric Gravity | 33 pages, v2: typos corrected, references added; v3: must have
non-universal gravitational coupling; v4: rewritten with extended theory
(results unchanged); v6: inconsistent equation replaced (results unaffected) | Eur. Phys. J. Plus 128, 75 (2013) | 10.1140/epjp/i2013-13075-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational field of an isolated, axisymmetric flat disk of spinning
dust is calculated approximately in the weak-field limit of quasi-metric
gravity. Boundary conditions single out the exponential disk as a "preferred"
physical surface density profile. Besides, collective properties of the disk,
in the form of... | [
{
"created": "Tue, 14 Dec 2010 18:30:51 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Dec 2011 08:18:03 GMT",
"version": "v2"
},
{
"created": "Fri, 16 May 2014 02:41:22 GMT",
"version": "v3"
},
{
"created": "Mon, 27 Dec 2021 16:35:24 GMT",
"version": "v4"
},
{
"c... | 2024-03-26 | [
[
"Østvang",
"Dag",
""
]
] | The gravitational field of an isolated, axisymmetric flat disk of spinning dust is calculated approximately in the weak-field limit of quasi-metric gravity. Boundary conditions single out the exponential disk as a "preferred" physical surface density profile. Besides, collective properties of the disk, in the form of a... |
2209.09380 | Carlos M. Reyes | Carlos M. Reyes | The ADM Formulation of the SME Gravity | Presented at the Ninth Meeting on CPT and Lorentz Symmetry,
Bloomington, Indiana, May 17-26, 2022 | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hamiltonian formulation of the gravitational sector of the Standard-Model
Extension (SME) with nondynamical fields $u$ and $s^{\mu \nu}$ is studied. We
provide the relevant Hamiltonians that describe the constrained phase space and
the dynamics of the induced metric on the ADM hypersurface. The generalization
of ... | [
{
"created": "Mon, 19 Sep 2022 23:27:43 GMT",
"version": "v1"
}
] | 2022-09-21 | [
[
"Reyes",
"Carlos M.",
""
]
] | The Hamiltonian formulation of the gravitational sector of the Standard-Model Extension (SME) with nondynamical fields $u$ and $s^{\mu \nu}$ is studied. We provide the relevant Hamiltonians that describe the constrained phase space and the dynamics of the induced metric on the ADM hypersurface. The generalization of th... |
gr-qc/0501089 | Adrian Melissinos | Adrian C. Melissinos and William E.Butler (Department of Physics and
Astronomy University of Rochester, Rochester NY) | Measurement of a Stochastic Gravitational Wave Background with a Single
Laser Interferometer | null | null | null | null | gr-qc | null | Laser interferometer gravitational wave detectors can be operated at their
free spectral range frequency. We show that in this case and when the
interferometer is well understood one could detect a stochastic background
using a single detector.
| [
{
"created": "Thu, 27 Jan 2005 22:18:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Melissinos",
"Adrian C.",
"",
"Department of Physics and\n Astronomy University of Rochester, Rochester NY"
],
[
"Butler",
"William E.",
"",
"Department of Physics and\n Astronomy University of Rochester, Rochester NY"
]
] | Laser interferometer gravitational wave detectors can be operated at their free spectral range frequency. We show that in this case and when the interferometer is well understood one could detect a stochastic background using a single detector. |
1411.3008 | Philippe G. LeFloch | Annegret Y. Burtscher and Philippe G. LeFloch | The formation of trapped surfaces in spherically-symmetric
Einstein-Euler spacetimes with bounded variation | 46 pages | Journal de Math\'ematiques Pures et Appliqu\'ees, Volume 102
(2014), Issue 6, 1164-1217 | 10.1016/j.matpur.2014.10.003 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evolution of a self-gravitating compressible fluid in spherical
symmetry and we prove the existence of weak solutions with bounded variation
for the Einstein-Euler equations of general relativity. We formulate the
initial value problem in Eddington-Finkelstein coordinates and prescribe
spherically symmet... | [
{
"created": "Tue, 11 Nov 2014 22:45:57 GMT",
"version": "v1"
}
] | 2021-06-17 | [
[
"Burtscher",
"Annegret Y.",
""
],
[
"LeFloch",
"Philippe G.",
""
]
] | We study the evolution of a self-gravitating compressible fluid in spherical symmetry and we prove the existence of weak solutions with bounded variation for the Einstein-Euler equations of general relativity. We formulate the initial value problem in Eddington-Finkelstein coordinates and prescribe spherically symmetri... |
1901.11312 | Ermis Mitsou | Ermis Mitsou | Spin connection formulations of real Lorentzian General Relativity | 20 pages | Class.Quant.Grav. 36 (2019) no.4, 045008 | 10.1088/1361-6382/ab00b1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the pure spin connection and constraint-free BF formulations of
real four-dimensional Lorentzian vacuum General Relativity. In contrast to the
existing complex formulations, an important advantage is that they do not
require the reality constraints that complicate quantization. We also consider
the correspo... | [
{
"created": "Thu, 31 Jan 2019 11:38:21 GMT",
"version": "v1"
}
] | 2019-02-01 | [
[
"Mitsou",
"Ermis",
""
]
] | We derive the pure spin connection and constraint-free BF formulations of real four-dimensional Lorentzian vacuum General Relativity. In contrast to the existing complex formulations, an important advantage is that they do not require the reality constraints that complicate quantization. We also consider the correspond... |
0910.2857 | Gerhard Schaefer | Gerhard Sch\"afer | Post-Newtonian methods: Analytic results on the binary problem | 44 pages, to appear in the book "Mass and Motion in General
Relativity", proceedings of the CNRS School in Orleans/France, eds. L.
Blanchet, A. Spallicci, and B. Whiting | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A detailed account is given on approximation schemes to the Einstein theory
of general relativity where the iteration starts from the Newton theory of
gravity. Two different coordinate conditions are used to represent the Einstein
field equations, the generalized isotropic ones of the canonical formalism of
Arnowitt,... | [
{
"created": "Thu, 15 Oct 2009 12:42:29 GMT",
"version": "v1"
}
] | 2024-05-19 | [
[
"Schäfer",
"Gerhard",
""
]
] | A detailed account is given on approximation schemes to the Einstein theory of general relativity where the iteration starts from the Newton theory of gravity. Two different coordinate conditions are used to represent the Einstein field equations, the generalized isotropic ones of the canonical formalism of Arnowitt, D... |
gr-qc/0301106 | Kirill Bronnikov | K.A. Bronnikov, S.B. Fadeev and A.V. Michtchenko | Scalar field in a minimally coupled brane world: no-hair and other no-go
theorems | 8 pages, Latex2e. Numerical estimates and a few references added | Int.J.Mod.Phys. D13 (2004) 593-606 | 10.1142/S0218271804003561 | null | gr-qc | null | In the brane-world framework, we consider static, spherically symmetric
configurations of a scalar field with the Lagrangian $(\d\phi)^2/2 - V(\phi)$,
confined on the brane. We use the 4D Einstein equations on the brane obtained
by Shiromizu et al., containing the usual stress tensor $T\mN$, the tensor
$\Pi\mN$, quad... | [
{
"created": "Sat, 25 Jan 2003 22:00:52 GMT",
"version": "v1"
},
{
"created": "Wed, 14 May 2003 19:30:14 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Fadeev",
"S. B.",
""
],
[
"Michtchenko",
"A. V.",
""
]
] | In the brane-world framework, we consider static, spherically symmetric configurations of a scalar field with the Lagrangian $(\d\phi)^2/2 - V(\phi)$, confined on the brane. We use the 4D Einstein equations on the brane obtained by Shiromizu et al., containing the usual stress tensor $T\mN$, the tensor $\Pi\mN$, quadra... |
1011.3656 | Leonardo Fernandez-Jambrina | L. Fern\'andez-Jambrina | $w$-cosmological singularities | 5 pp, revtex4.cls, to appear in Physical Review D | Phys.Rev.D82:124004,2010 | 10.1103/PhysRevD.82.124004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we characterize barotropic index singularities of homogeneous
isotropic cosmological models. They are shown to appear in cosmologies for
which the scale factor is analytical with a Taylor series in which the linear
and quadratic terms are absent. Though the barotropic index of the perfect
fluid is singu... | [
{
"created": "Tue, 16 Nov 2010 11:30:18 GMT",
"version": "v1"
}
] | 2010-12-23 | [
[
"Fernández-Jambrina",
"L.",
""
]
] | In this paper we characterize barotropic index singularities of homogeneous isotropic cosmological models. They are shown to appear in cosmologies for which the scale factor is analytical with a Taylor series in which the linear and quadratic terms are absent. Though the barotropic index of the perfect fluid is singula... |
1501.01540 | Maciej Wielgus | Maciek Wielgus, Marek A. Abramowicz | Stress-energy tensor of a radiating sphere inclosing black hole | To appear in the Proceedings of RAGtime | Proceedings of RAGtime 14-16, 293-298, Opava, Prague, Czech
Republic (2014) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a uniformly luminous radiating sphere and a static black hole
located in the center of that sphere. We give analytic formulas for radiation
stress-energy tensor components in such a configuration, for the observer
located at an arbitrary distance from the static black hole horizon.
| [
{
"created": "Wed, 7 Jan 2015 16:19:54 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Wielgus",
"Maciek",
""
],
[
"Abramowicz",
"Marek A.",
""
]
] | We consider a uniformly luminous radiating sphere and a static black hole located in the center of that sphere. We give analytic formulas for radiation stress-energy tensor components in such a configuration, for the observer located at an arbitrary distance from the static black hole horizon. |
gr-qc/0105028 | Luca Baiotti | D. Babusci, L. Baiotti, F. Fucito, A. Nagar | On the Detection of a Scalar Stochastic Background of Gravitational
Waves | 25 pages, 3 figures | Phys.Rev.D64:062001,2001 | 10.1103/PhysRevD.64.062001 | UPRF-2001-10 | gr-qc astro-ph hep-th | null | In the near future we will witness the coming to a full operational regime of
laser interferometers and resonant mass detectors of spherical shape. In this
work we study the sensitivity of pairs of such gravitational wave detectors to
a scalar stochastic background of gravitational waves. Our computations are
carried... | [
{
"created": "Tue, 8 May 2001 16:53:35 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jun 2001 11:37:51 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Babusci",
"D.",
""
],
[
"Baiotti",
"L.",
""
],
[
"Fucito",
"F.",
""
],
[
"Nagar",
"A.",
""
]
] | In the near future we will witness the coming to a full operational regime of laser interferometers and resonant mass detectors of spherical shape. In this work we study the sensitivity of pairs of such gravitational wave detectors to a scalar stochastic background of gravitational waves. Our computations are carried o... |
1008.4968 | Hao Wei | Hao Wei | Cosmological Evolution of Quintessence and Phantom with a New Type of
Interaction in Dark Sector | 11 pages, 6 tables, revtex4; v2: Nucl. Phys. B in press; v3:
published version | Nucl.Phys.B845:381-392,2011 | 10.1016/j.nuclphysb.2010.12.010 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work, motivated by the work of Cai and Su [Phys. Rev. D {\bf
81}, 103514 (2010)], we propose a new type of interaction in dark sector, which
can change its sign when our universe changes from deceleration to
acceleration. We consider the cosmological evolution of quintessence and
phantom with this type... | [
{
"created": "Sun, 29 Aug 2010 22:36:00 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Dec 2010 08:17:00 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Jan 2011 09:24:00 GMT",
"version": "v3"
}
] | 2011-01-21 | [
[
"Wei",
"Hao",
""
]
] | In the present work, motivated by the work of Cai and Su [Phys. Rev. D {\bf 81}, 103514 (2010)], we propose a new type of interaction in dark sector, which can change its sign when our universe changes from deceleration to acceleration. We consider the cosmological evolution of quintessence and phantom with this type o... |
gr-qc/0004054 | Holger Lyre | Holger Lyre | A Generalized Equivalence Principle | null | Int.J.Mod.Phys. D9 (2000) 633-648 | 10.1142/S0218271800000694 | null | gr-qc hep-th quant-ph | null | Gauge field theories may quite generally be defined as describing the
coupling of a matter-field to an interaction-field, and they are suitably
represented in the mathematical framework of fiber bundles. Their underlying
principle is the so-called gauge principle, which is based on the idea of
deriving the coupling s... | [
{
"created": "Mon, 17 Apr 2000 13:42:59 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Mar 2001 10:32:29 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Lyre",
"Holger",
""
]
] | Gauge field theories may quite generally be defined as describing the coupling of a matter-field to an interaction-field, and they are suitably represented in the mathematical framework of fiber bundles. Their underlying principle is the so-called gauge principle, which is based on the idea of deriving the coupling str... |
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