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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9904034 | Alessandro Fabbri | R. Balbinot and A. Fabbri | 4D quantum black hole physics from 2D models? | latex, 13 pages; misprints corrected, references added | Phys.Lett. B459 (1999) 112-118 | 10.1016/S0370-2693(99)00687-5 | SU-ITP/99-18 | gr-qc hep-th | null | Minimally coupled 4D scalar fields in Schwarzschild space-time are
considered. Dimensional reduction to 2D leads to a well known anomaly induced
effective action, which we consider here in a local form with the introduction
of auxiliary fields. Boundary conditions are imposed on them in order to select
the appropriat... | [
{
"created": "Wed, 14 Apr 1999 23:54:25 GMT",
"version": "v1"
},
{
"created": "Mon, 17 May 1999 23:12:36 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Balbinot",
"R.",
""
],
[
"Fabbri",
"A.",
""
]
] | Minimally coupled 4D scalar fields in Schwarzschild space-time are considered. Dimensional reduction to 2D leads to a well known anomaly induced effective action, which we consider here in a local form with the introduction of auxiliary fields. Boundary conditions are imposed on them in order to select the appropriate ... |
1402.1756 | Foek Hioe | F.T Hioe | Characterizing planetary orbits and trajectories of light in the
Reissner-Nordstrom metric | 32 pages including 9 figures, misprints in eq.(96) and in Fig.4
corrected, 9 references added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Exact analytic expressions for planetary orbits and light trajectories in the
Reissner-Nordstrom geometry are presented. They are characterized in a map
specified by three dimensionless parameters for the planetary orbits, while two
dimensionless parameters are required to map the trajectories of light. Notable
diffe... | [
{
"created": "Fri, 7 Feb 2014 20:49:43 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Mar 2014 18:51:57 GMT",
"version": "v2"
}
] | 2014-03-07 | [
[
"Hioe",
"F. T",
""
]
] | Exact analytic expressions for planetary orbits and light trajectories in the Reissner-Nordstrom geometry are presented. They are characterized in a map specified by three dimensionless parameters for the planetary orbits, while two dimensionless parameters are required to map the trajectories of light. Notable differe... |
1605.04467 | Hristu Culetu | Hristu Culetu | On a nonlinear gravitational wave. Geodesics | 11 pages, no figures, version published in Prog. Theor. Exp. Phys.
(2016) 123E02 | null | 10.1093/ptep/ptw181 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An exact, plane wave solution of the gravitational field equations is
investigated. The source stress tensor is represented by an anisotropic null
fluid with energy flux to which the energy density $\rho$ and all pressures are
finite throughout the spacetime. They depend on a constant length (taken of the
order of th... | [
{
"created": "Sat, 14 May 2016 21:14:32 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Aug 2016 15:26:02 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Sep 2016 11:24:53 GMT",
"version": "v3"
},
{
"created": "Sun, 1 Jan 2017 12:45:21 GMT",
"version": "v4"
}
] | 2017-01-03 | [
[
"Culetu",
"Hristu",
""
]
] | An exact, plane wave solution of the gravitational field equations is investigated. The source stress tensor is represented by an anisotropic null fluid with energy flux to which the energy density $\rho$ and all pressures are finite throughout the spacetime. They depend on a constant length (taken of the order of the ... |
gr-qc/0609054 | Hunter Monroe | Hunter Monroe | Are Causality Violations Undesirable? | Accepted in October 2008 by Foundations of Physics. Latex2e, 6 pages,
no figures. Presented at a seminar at the Universidad Nacional Autonoma de
Mexico. Version 2 was co-winner of the QMUL CTC Essay Prize | Found.Phys.38:1065-1069,2008 | 10.1007/s10701-008-9254-9 | null | gr-qc math.AT math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Causality violations are typically seen as unrealistic and undesirable
features of a physical model. The following points out three reasons why
causality violations, which Bonnor and Steadman identified even in solutions to
the Einstein equation referring to ordinary laboratory situations, are not
necessarily undesir... | [
{
"created": "Fri, 15 Sep 2006 16:09:30 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Sep 2006 15:11:32 GMT",
"version": "v2"
},
{
"created": "Sat, 13 Jan 2007 04:18:12 GMT",
"version": "v3"
},
{
"created": "Tue, 4 Nov 2008 22:14:09 GMT",
"version": "v4"
},
{
"cr... | 2010-03-23 | [
[
"Monroe",
"Hunter",
""
]
] | Causality violations are typically seen as unrealistic and undesirable features of a physical model. The following points out three reasons why causality violations, which Bonnor and Steadman identified even in solutions to the Einstein equation referring to ordinary laboratory situations, are not necessarily undesirab... |
0901.2307 | Mark D. Roberts | Mark D. Roberts | New Five Dimensional Spherical Vacuum Solutions | 16 pages of astrophysicists nightmare, relativists delight | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new five dimensional spherical vacuum solution is both dervied and its
signature, curvature and truncation discussed. Its truncation leads to a four
dimensional spacetime with similiar stress to those found by charge-free
Kaluza-Klein compactification. Various other restrictions to four dimensions
are looked at to ... | [
{
"created": "Thu, 15 Jan 2009 16:38:49 GMT",
"version": "v1"
}
] | 2009-01-16 | [
[
"Roberts",
"Mark D.",
""
]
] | A new five dimensional spherical vacuum solution is both dervied and its signature, curvature and truncation discussed. Its truncation leads to a four dimensional spacetime with similiar stress to those found by charge-free Kaluza-Klein compactification. Various other restrictions to four dimensions are looked at to se... |
2312.12988 | Abdallah Al Zahrani M. | Abdallah M. Al Zahrani | Tilted Circular Orbits around a Kerr Black Hole | This paper had been accepted for publication in PRD | null | 10.1103/PhysRevD.109.024029 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study circular orbits that are tilted with respect to the equatorial plane
around a Kerr black hole. We write the equations for the parameters of a tilted
circular orbit in terms of the orbit's radius and the Carter constant, or
equivalently, the tilt angle. The tilted innermost stable circular orbits
(TISCO)s are... | [
{
"created": "Wed, 20 Dec 2023 12:44:59 GMT",
"version": "v1"
}
] | 2024-01-23 | [
[
"Zahrani",
"Abdallah M. Al",
""
]
] | We study circular orbits that are tilted with respect to the equatorial plane around a Kerr black hole. We write the equations for the parameters of a tilted circular orbit in terms of the orbit's radius and the Carter constant, or equivalently, the tilt angle. The tilted innermost stable circular orbits (TISCO)s are d... |
2404.10364 | Jarmo M\"akel\"a Dr. | Jarmo M\"akel\"a | Quantum Gravity in Flat Spacetime | 16 pages, no figures. Accepted for publication in the International
Journal of Modern Physics D. Comments welcome! | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Inspired by Einstein's Strong Principle of Equivalence we consider the
effects of quantum mechanics to the gravity-like phenomena experienced by an
observer in a uniformly accelerating motion in flat spacetime. Among other
things, our model of quantum gravity, derived from the first principles,
predicts the Unruh eff... | [
{
"created": "Tue, 16 Apr 2024 07:55:33 GMT",
"version": "v1"
}
] | 2024-04-17 | [
[
"Mäkelä",
"Jarmo",
""
]
] | Inspired by Einstein's Strong Principle of Equivalence we consider the effects of quantum mechanics to the gravity-like phenomena experienced by an observer in a uniformly accelerating motion in flat spacetime. Among other things, our model of quantum gravity, derived from the first principles, predicts the Unruh effec... |
2202.10231 | Z. Yousaf | Z. Yousaf | Spatially Hyperbolic Gravitating Sources in $\Lambda$-Dominated Era | 14 pages, 4 figures, version accepted for publications in Universe | Universe 2022, 8(2), 131 | 10.3390/universe8020131 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This study focuses on the impact of the cosmological constant on
hyperbolically symmetric matter configurations in static background. We extend
the work of Herrera \cite{herrera2021hyperbolically} and describe the
influences of such repulsive character on a few realistic features of
hyperbolical anisotropic fluids. A... | [
{
"created": "Tue, 15 Feb 2022 11:43:58 GMT",
"version": "v1"
}
] | 2022-02-22 | [
[
"Yousaf",
"Z.",
""
]
] | This study focuses on the impact of the cosmological constant on hyperbolically symmetric matter configurations in static background. We extend the work of Herrera \cite{herrera2021hyperbolically} and describe the influences of such repulsive character on a few realistic features of hyperbolical anisotropic fluids. Aft... |
gr-qc/0201010 | Jiri Bicak | Jiri Bicak | Radiative spacetimes | 13 pages, 3 figures. To be published in: Recent Developments in
General Relativity, Genoa 2000, Cianci, R., Collina, R., Francaviglia, M.,
Fre, P. (Eds.), Springer 2002 | null | null | null | gr-qc | null | The question of existence of general, asymptotically flat radiative
spacetimes and examples of explicit classes of radiative solutions of
Einstein's field equations are discussed in the light of some new developments.
The examples are cylindrical waves, Robinson-Trautman and type N spacetimes and
especially boost-rot... | [
{
"created": "Thu, 3 Jan 2002 22:06:04 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bicak",
"Jiri",
""
]
] | The question of existence of general, asymptotically flat radiative spacetimes and examples of explicit classes of radiative solutions of Einstein's field equations are discussed in the light of some new developments. The examples are cylindrical waves, Robinson-Trautman and type N spacetimes and especially boost-rotat... |
0809.3358 | Matteo Luca Ruggiero | Matteo Luca Ruggiero | Gravito-magnetic gyroscope precession in Palatini f(R) gravity | 6 pages, revised to match the version accepted for publication in
Physical Review D | Phys. Rev. D 79, 084001 (2009) | 10.1103/PhysRevD.79.084001 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study gravito-magnetic effects in the Palatini formalism of f(R) gravity.
On using the Kerr-de Sitter metric, which is a solution of f(R) field
equations, we calculate the impact of f(R) gravity on the gravito-magnetic
precession of an orbiting gyroscope. We show that, even though an $f(R)$
contribution is present... | [
{
"created": "Fri, 19 Sep 2008 12:16:21 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Mar 2009 09:30:01 GMT",
"version": "v2"
}
] | 2009-04-01 | [
[
"Ruggiero",
"Matteo Luca",
""
]
] | We study gravito-magnetic effects in the Palatini formalism of f(R) gravity. On using the Kerr-de Sitter metric, which is a solution of f(R) field equations, we calculate the impact of f(R) gravity on the gravito-magnetic precession of an orbiting gyroscope. We show that, even though an $f(R)$ contribution is present i... |
1512.03608 | Sudipta Das | Abdulla Al Mamon, Sudipta Das | Study of parametrized dark energy models with a general non-canonical
scalar field | 22 pages, 13 figures | The European Physical Journal C, {\bf76}, 1 (2016) | 10.1140/epjc/s10052-016-3982-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have considered various dark energy models in the framework
of a non-canonical scalar field with a Lagrangian density of the form ${\cal
L}(\phi, X)=f(\phi)X{\left(\frac{X}{M^{4}_{Pl}}\right)}^{\alpha -1} - V(\phi)$,
which provides the standard canonical scalar field model for $\alpha=1$ and
$f(\phi... | [
{
"created": "Fri, 11 Dec 2015 11:54:04 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Apr 2016 10:55:07 GMT",
"version": "v2"
}
] | 2016-04-20 | [
[
"Mamon",
"Abdulla Al",
""
],
[
"Das",
"Sudipta",
""
]
] | In this paper, we have considered various dark energy models in the framework of a non-canonical scalar field with a Lagrangian density of the form ${\cal L}(\phi, X)=f(\phi)X{\left(\frac{X}{M^{4}_{Pl}}\right)}^{\alpha -1} - V(\phi)$, which provides the standard canonical scalar field model for $\alpha=1$ and $f(\phi)=... |
gr-qc/0207006 | Michael A. Ivanov | Michael A. Ivanov | Screening the graviton background, graviton pairing, and Newtonian
gravity | Preprint, 16 pages. A small correction is made in this version at the
very beginning of section 4 | null | null | null | gr-qc | null | It is shown that screening the background of super-strong interacting
gravitons creates for any pair of bodies as an attraction force as well an
repulsion force due to pressure of gravitons. For single gravitons, these
forces are approximately balanced, but each of them is much bigger than a force
of Newtonian attrac... | [
{
"created": "Sun, 30 Jun 2002 19:11:44 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Dec 2005 16:01:41 GMT",
"version": "v2"
},
{
"created": "Sat, 28 Jan 2006 08:04:08 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Ivanov",
"Michael A.",
""
]
] | It is shown that screening the background of super-strong interacting gravitons creates for any pair of bodies as an attraction force as well an repulsion force due to pressure of gravitons. For single gravitons, these forces are approximately balanced, but each of them is much bigger than a force of Newtonian attracti... |
2308.12150 | Lai Zhao | Lai Zhao, Zhaoyi Xu | Destroying the Event Horizon of a Rotating Black-Bounce Black Hole | null | Eur. Phys. J. C 83, 938 (2023) | 10.1140/epjc/s10052-023-12117-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For a rotating black hole to be nonsingular, it means that there are no
spacetime singularities at its center. The destruction of the event horizon of
such a rotating black hole is not constrained by the weak cosmic censorship
conjecture, which may provide possibilities to understand the internal
structure of black h... | [
{
"created": "Wed, 23 Aug 2023 14:08:32 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Oct 2023 04:28:07 GMT",
"version": "v2"
}
] | 2023-10-26 | [
[
"Zhao",
"Lai",
""
],
[
"Xu",
"Zhaoyi",
""
]
] | For a rotating black hole to be nonsingular, it means that there are no spacetime singularities at its center. The destruction of the event horizon of such a rotating black hole is not constrained by the weak cosmic censorship conjecture, which may provide possibilities to understand the internal structure of black hol... |
1806.02827 | Brahim Lamine | Jos\'e-Philippe P\'erez, Brahim Lamine | Phase velocity and light bending in a gravitational potential | 21 pages, 3 figures | null | 10.1088/1361-6404/aacaac | null | gr-qc physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we review the derivation of light bending obtained before the
discovery of General Relativity (GR). It is intended for students learning GR
or specialist that will find new lights and connexions on these historic
derivations. Since 1915, it is well known that the observed light bending stems
from two co... | [
{
"created": "Thu, 7 Jun 2018 11:38:26 GMT",
"version": "v1"
}
] | 2018-06-11 | [
[
"Pérez",
"José-Philippe",
""
],
[
"Lamine",
"Brahim",
""
]
] | In this paper we review the derivation of light bending obtained before the discovery of General Relativity (GR). It is intended for students learning GR or specialist that will find new lights and connexions on these historic derivations. Since 1915, it is well known that the observed light bending stems from two cont... |
1504.04243 | Julio Marny Hoff da Silva | M. Dias, J. M. Hoff da Silva, and Roldao da Rocha | Thick Braneworlds and the Gibbons-Kallosh-Linde No-go Theorem in the
Gauss-Bonnet Framework | 6 pages, to appear in the EPL. arXiv admin note: text overlap with
arXiv:1406.6324 | null | 10.1209/0295-5075/110/20004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The sum rules related to thick braneworlds are constructed, in order to
encompass Gauss-Bonnet terms. The generation of thick branes is hence proposed
in a periodic extra dimension scenario, what circumvents the
Gibbons-Kallosh-Linde no-go theorem in this context.
| [
{
"created": "Thu, 16 Apr 2015 14:11:19 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Dias",
"M.",
""
],
[
"da Silva",
"J. M. Hoff",
""
],
[
"da Rocha",
"Roldao",
""
]
] | The sum rules related to thick braneworlds are constructed, in order to encompass Gauss-Bonnet terms. The generation of thick branes is hence proposed in a periodic extra dimension scenario, what circumvents the Gibbons-Kallosh-Linde no-go theorem in this context. |
gr-qc/0010064 | Kholodenko Arkady L. | Arkady L.Kholodenko | Statistical Mechanics of 2+1 Gravity From Riemann Zeta Function and
Alexander Polynomial:Exact Results | 69 pages,11 figures. Journal of Geometry and Physics (in press) | J.Geom.Phys. 38 (2001) 81-139 | 10.1016/S0393-0440(00)00049-8 | null | gr-qc | null | In the recent publication (Journal of Geometry and Physics,33(2000)23-102) we
demonstrated that dynamics of 2+1 gravity can be described in terms of train
tracks. Train tracks were introduced by Thurston in connection with description
of dynamics of surface automorphisms. In this work we provide an example of
utiliza... | [
{
"created": "Wed, 18 Oct 2000 19:09:01 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Kholodenko",
"Arkady L.",
""
]
] | In the recent publication (Journal of Geometry and Physics,33(2000)23-102) we demonstrated that dynamics of 2+1 gravity can be described in terms of train tracks. Train tracks were introduced by Thurston in connection with description of dynamics of surface automorphisms. In this work we provide an example of utilizati... |
2211.05099 | Georgios Antoniou | Farid Thaalba, Georgios Antoniou, Thomas P. Sotiriou | Black hole minimum size and scalar charge in shift-symmetric theories | 23 pages, 9 figures | null | 10.1088/1361-6382/acdd42 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that, for shift-symmetric scalars, only a linear coupling with
the Gauss-Bonnet invariant can introduce black hole hair. Such hairy black
holes have a minimum mass, determined by the coupling of this interaction, and
a scalar charge that is uniquely determined by their mass and spin for a fixed
value of t... | [
{
"created": "Wed, 9 Nov 2022 18:45:28 GMT",
"version": "v1"
},
{
"created": "Sat, 5 Aug 2023 16:11:22 GMT",
"version": "v2"
}
] | 2023-08-08 | [
[
"Thaalba",
"Farid",
""
],
[
"Antoniou",
"Georgios",
""
],
[
"Sotiriou",
"Thomas P.",
""
]
] | It is known that, for shift-symmetric scalars, only a linear coupling with the Gauss-Bonnet invariant can introduce black hole hair. Such hairy black holes have a minimum mass, determined by the coupling of this interaction, and a scalar charge that is uniquely determined by their mass and spin for a fixed value of tha... |
1501.00936 | Daniele Pranzetti | Daniele Oriti, Daniele Pranzetti, James P. Ryan and Lorenzo Sindoni | Generalized quantum gravity condensates for homogeneous geometries and
cosmology | 32 pages, 6 figures; presentation improved and some typos corrected.
Published version | Class.Quant.Grav. 32 (2015) 23, 235016 | 10.1088/0264-9381/32/23/235016 | AEI-2015-003 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a generalized class of quantum gravity condensate states, that
allows the description of continuum homogeneous quantum geometries within the
full theory. They are based on similar ideas already applied to extract
effective cosmological dynamics from the group field theory formalism, and thus
also from lo... | [
{
"created": "Mon, 5 Jan 2015 17:59:28 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Nov 2015 14:26:54 GMT",
"version": "v2"
}
] | 2015-11-24 | [
[
"Oriti",
"Daniele",
""
],
[
"Pranzetti",
"Daniele",
""
],
[
"Ryan",
"James P.",
""
],
[
"Sindoni",
"Lorenzo",
""
]
] | We construct a generalized class of quantum gravity condensate states, that allows the description of continuum homogeneous quantum geometries within the full theory. They are based on similar ideas already applied to extract effective cosmological dynamics from the group field theory formalism, and thus also from loop... |
1910.02279 | Grigoris Panotopoulos | Grigoris Panotopoulos | How compact stars challenge our view about dark matter | References added, to appear in the Proceedings of the 22nd Bled
Workshop "What Comes Beyond the Standard Models?", presentation based on
works arXiv:1706.07272, arXiv:1709.06643, arXiv:1904.07191 and
arXiv:1904.07195 in a collaboration with Il\'idio Lopes | null | null | null | gr-qc astro-ph.CO astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is by now well established that non-relativistic matter in the Universe is
dominated by dark matter, the origin and nature of which still remains a
mystery. Although the collisionless dark matter paradigm works very well at
large distances, a few puzzles at galactic scales arise. These problems may be
tackled assu... | [
{
"created": "Sat, 5 Oct 2019 14:46:33 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Oct 2019 11:02:37 GMT",
"version": "v2"
}
] | 2019-10-28 | [
[
"Panotopoulos",
"Grigoris",
""
]
] | It is by now well established that non-relativistic matter in the Universe is dominated by dark matter, the origin and nature of which still remains a mystery. Although the collisionless dark matter paradigm works very well at large distances, a few puzzles at galactic scales arise. These problems may be tackled assumi... |
0712.1998 | Cenalo Vaz | Cenalo Vaz, Sashideep Gutti, Claus Kiefer, T. P. Singh, L.C.R.
Wijewardhana | Mass Spectrum and Statistical Entropy of the BTZ black hole from
Canonical Quantum Gravity | 15 pages, no figures. Two explanatory paragraphs have been added.
This version will appear in Physical Review D | Phys.Rev.D77:064021,2008 | 10.1103/PhysRevD.77.064021 | null | gr-qc astro-ph hep-th | null | In a recent publication we developed a canonical quantization program
describing the gravitational collapse of a spherical dust cloud in 2+1
dimensions with a negative cosmological constant $-\Lambda\equiv -l^{-2}<0$. In
this paper we address the quantization of the Banados--Teitelboim--Zanelli
(BTZ) black hole. We s... | [
{
"created": "Wed, 12 Dec 2007 18:09:26 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Feb 2008 03:06:19 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Vaz",
"Cenalo",
""
],
[
"Gutti",
"Sashideep",
""
],
[
"Kiefer",
"Claus",
""
],
[
"Singh",
"T. P.",
""
],
[
"Wijewardhana",
"L. C. R.",
""
]
] | In a recent publication we developed a canonical quantization program describing the gravitational collapse of a spherical dust cloud in 2+1 dimensions with a negative cosmological constant $-\Lambda\equiv -l^{-2}<0$. In this paper we address the quantization of the Banados--Teitelboim--Zanelli (BTZ) black hole. We sho... |
gr-qc/9712051 | Dr N. Mavromatos | G.A. Diamandis, John Ellis, B.C. Georgalas, N.E. Mavromatos, D.V.
Nanopoulos, and E. Papantonopoulos | Irreversible Time Flow in a Two-Dimensional Dilaton Black Hole with
Matter | 20 pages LATEX, three figures incorporated | Int.J.Mod.Phys.A13:4265-4280,1998 | 10.1142/S0217751X98002055 | OUTP-97-69P, CTP-TAMU-50/97 UA-NPPS-9-97 NTUA-68/97 | gr-qc hep-th | null | We show that an exact solution of two-dimensional dilaton gravity with matter
discovered previously exhibits an irreversible temporal flow towards flat space
with a vanishing cosmological constant. This time flow is induced by the back
reaction of matter on the space-time geometry. We demonstrate that the system
is n... | [
{
"created": "Thu, 11 Dec 1997 15:49:56 GMT",
"version": "v1"
}
] | 2009-09-11 | [
[
"Diamandis",
"G. A.",
""
],
[
"Ellis",
"John",
""
],
[
"Georgalas",
"B. C.",
""
],
[
"Mavromatos",
"N. E.",
""
],
[
"Nanopoulos",
"D. V.",
""
],
[
"Papantonopoulos",
"E.",
""
]
] | We show that an exact solution of two-dimensional dilaton gravity with matter discovered previously exhibits an irreversible temporal flow towards flat space with a vanishing cosmological constant. This time flow is induced by the back reaction of matter on the space-time geometry. We demonstrate that the system is not... |
1212.2557 | Keiju Murata Dr | James Lucietti, Keiju Murata, Harvey S. Reall, Norihiro Tanahashi | On the horizon instability of an extreme Reissner-Nordstr\"om black hole | 44 pages, 19 figures | null | 10.1007/JHEP03(2013)035 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Aretakis has proved that a massless scalar field has an instability at the
horizon of an extreme Reissner-Nordstr\"om black hole. We show that a similar
instability occurs also for a massive scalar field and for coupled linearized
gravitational and electromagnetic perturbations. We present numerical results
for the l... | [
{
"created": "Tue, 11 Dec 2012 17:49:02 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Apr 2013 02:59:41 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Lucietti",
"James",
""
],
[
"Murata",
"Keiju",
""
],
[
"Reall",
"Harvey S.",
""
],
[
"Tanahashi",
"Norihiro",
""
]
] | Aretakis has proved that a massless scalar field has an instability at the horizon of an extreme Reissner-Nordstr\"om black hole. We show that a similar instability occurs also for a massive scalar field and for coupled linearized gravitational and electromagnetic perturbations. We present numerical results for the lat... |
1904.00153 | Debottam Nandi | Debottam Nandi | Note on stability in conformally connected frames | 25 pages, 6 figures, 1 table. The title and the format have been
changed | Phys. Rev. D 99, 103532 (2019) | 10.1103/PhysRevD.99.103532 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamics in conformally connected frames are often referred to as
'equivalent'. In the context of cosmology, while the perturbations remain
invariant for a single scalar field model, the background equations differ and
therefore the dynamics. However, since the background dynamics are not the
same, it is not clear wh... | [
{
"created": "Sat, 30 Mar 2019 05:36:08 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Apr 2019 05:37:32 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Jun 2019 11:15:55 GMT",
"version": "v3"
}
] | 2019-06-05 | [
[
"Nandi",
"Debottam",
""
]
] | Dynamics in conformally connected frames are often referred to as 'equivalent'. In the context of cosmology, while the perturbations remain invariant for a single scalar field model, the background equations differ and therefore the dynamics. However, since the background dynamics are not the same, it is not clear whet... |
gr-qc/9503041 | Thibault Damour | Thibault Damour, David Vokrouhlicky | Conservation laws for systems of extended bodies in the first
post-Newtonian approximation. | 18 pages, Revtex | Phys.Rev. D52 (1995) 4455-4461 | 10.1103/PhysRevD.52.4455 | IHES/P/95/25 | gr-qc | null | The general form of the global conservation laws for $N$-body systems in the
first post-Newtonian approximation of general relativity is considered. Our
approach applies to the motion of an isolated system of $N$ arbitrarily
composed and shaped, weakly self-gravitating, rotating, deformable bodies and
uses a framewor... | [
{
"created": "Wed, 22 Mar 1995 19:22:52 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Damour",
"Thibault",
""
],
[
"Vokrouhlicky",
"David",
""
]
] | The general form of the global conservation laws for $N$-body systems in the first post-Newtonian approximation of general relativity is considered. Our approach applies to the motion of an isolated system of $N$ arbitrarily composed and shaped, weakly self-gravitating, rotating, deformable bodies and uses a framework ... |
gr-qc/9806002 | Peter Breitenlohner | Peter Breitenlohner and Dieter Maison | On Nonlinear $\sigma$-Models arizing in (Super-)Gravity | 33 pages, 1 table | Commun.Math.Phys. 209 (2000) 785-810 | 10.1007/s002200050038 | MPI-PhT 98-42 | gr-qc | null | In a previous paper with Gibbons [CMP 120 (1987) 295] we derived a list of
three dimensional symmetric space $\sigma$-model obtained by dimensional
reduction of a class of four dimensional gravity theories with abelian gauge
fields and scalars. Here we give a detailed analysis of their group theoretical
structure lea... | [
{
"created": "Sat, 30 May 1998 13:33:12 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Breitenlohner",
"Peter",
""
],
[
"Maison",
"Dieter",
""
]
] | In a previous paper with Gibbons [CMP 120 (1987) 295] we derived a list of three dimensional symmetric space $\sigma$-model obtained by dimensional reduction of a class of four dimensional gravity theories with abelian gauge fields and scalars. Here we give a detailed analysis of their group theoretical structure leadi... |
2408.06023 | Piyabut Burikham | Teephatai Bunyaratavej, Piyabut Burikham, David Senjaya | Revisiting Chronology Protection Conjecture in The Dyonic Kerr-Sen Black
Hole Spacetime | 24 pages, 11 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The Chronology Protection Conjecture (CPC) was first introduced by Hawking
after his semi-classical investigation to the behaviour of a spacetime with
closed timelike curves (CTCs) in response to scalar perturbation. It is argued
that there would be instabilities leading to amplification of the perturbation
and final... | [
{
"created": "Mon, 12 Aug 2024 09:22:57 GMT",
"version": "v1"
}
] | 2024-08-13 | [
[
"Bunyaratavej",
"Teephatai",
""
],
[
"Burikham",
"Piyabut",
""
],
[
"Senjaya",
"David",
""
]
] | The Chronology Protection Conjecture (CPC) was first introduced by Hawking after his semi-classical investigation to the behaviour of a spacetime with closed timelike curves (CTCs) in response to scalar perturbation. It is argued that there would be instabilities leading to amplification of the perturbation and finally... |
1203.5736 | Carlos Coimbra-Araujo | C. H. Coimbra-Araujo and Roldao da Rocha | Gravity with extra dimensions and dark matter interpretation: A
straightforward approach | 13 pages, 6 figures | ISRN High Energy Physics Volume 2013 (2013), Article ID 713508, 9
pages | 10.1155/2013/713508 | null | gr-qc astro-ph.CO astro-ph.GA hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Any connection between dark matter and extra dimensions can be cognizably
evinced from the associated effective energy-momentum tensor. In order to
investigate and test such relationship, a higher dimensional spacetime endowed
with a factorizable general metric is regarded to derive a general expression
for the stres... | [
{
"created": "Mon, 26 Mar 2012 17:27:03 GMT",
"version": "v1"
}
] | 2013-07-17 | [
[
"Coimbra-Araujo",
"C. H.",
""
],
[
"da Rocha",
"Roldao",
""
]
] | Any connection between dark matter and extra dimensions can be cognizably evinced from the associated effective energy-momentum tensor. In order to investigate and test such relationship, a higher dimensional spacetime endowed with a factorizable general metric is regarded to derive a general expression for the stress ... |
1610.00020 | Eduardo Bittencourt | Eduardo Bittencourt, Leandro G. Gomes, Renato Klippert | Bianchi-I cosmology from causal thermodynamics | 19 pages, 1 figure. An appendix concerning the diagonalizability of
Bianchi type-I spacetimes was included. This matches the published version | Class. Quantum Grav. 34 (2017) 045010 | 10.1088/1361-6382/aa5994 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate diagonal Bianchi-I spacetimes in the presence of viscous
fluids by using the shear and the anisotropic pressure components as the basic
variables, where the viscosity is driven by the (second-order) causal
thermodynamics. A few exact solutions are presented, among which we mention the
anisotropic versi... | [
{
"created": "Fri, 30 Sep 2016 20:11:23 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Feb 2017 15:06:55 GMT",
"version": "v2"
}
] | 2017-02-13 | [
[
"Bittencourt",
"Eduardo",
""
],
[
"Gomes",
"Leandro G.",
""
],
[
"Klippert",
"Renato",
""
]
] | We investigate diagonal Bianchi-I spacetimes in the presence of viscous fluids by using the shear and the anisotropic pressure components as the basic variables, where the viscosity is driven by the (second-order) causal thermodynamics. A few exact solutions are presented, among which we mention the anisotropic version... |
1502.00276 | Bal\'azs Mik\'oczi | Bal\'azs Mik\'oczi, P\'eter Forg\'acs, M\'aty\'as Vas\'uth | Eccentric first post-Newtonian waveforms for compact binaries in
frequency domain with Hansen coefficients | 19 pages, 3 figures | Phys. Rev. D 92, 044038 (2015) | 10.1103/PhysRevD.92.044038 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inspiral and merger of supermassive black hole binary systems with high
orbital eccentricity are among the promising sources of the advanced
gravitational wave observatories. In this paper we derive analytic ready-to-use
first post-Newtonian eccentric waveform in Fourier domain with the use of
Hansen coefficients... | [
{
"created": "Sun, 1 Feb 2015 15:57:36 GMT",
"version": "v1"
}
] | 2015-08-26 | [
[
"Mikóczi",
"Balázs",
""
],
[
"Forgács",
"Péter",
""
],
[
"Vasúth",
"Mátyás",
""
]
] | The inspiral and merger of supermassive black hole binary systems with high orbital eccentricity are among the promising sources of the advanced gravitational wave observatories. In this paper we derive analytic ready-to-use first post-Newtonian eccentric waveform in Fourier domain with the use of Hansen coefficients. ... |
1701.03029 | Astrid Eichhorn | Astrid Eichhorn and Tim Koslowski | Flowing to the continuum in discrete tensor models for quantum gravity | 16 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Tensor models provide a way to access the path-integral for discretized
quantum gravity in d dimensions. As in the case of matrix models for
two-dimensional quantum gravity, the continuum limit can be related to a
Renormalization Group fixed point in a setup where the tensor size N serves as
the Renormalization Group... | [
{
"created": "Wed, 11 Jan 2017 15:54:10 GMT",
"version": "v1"
}
] | 2017-01-12 | [
[
"Eichhorn",
"Astrid",
""
],
[
"Koslowski",
"Tim",
""
]
] | Tensor models provide a way to access the path-integral for discretized quantum gravity in d dimensions. As in the case of matrix models for two-dimensional quantum gravity, the continuum limit can be related to a Renormalization Group fixed point in a setup where the tensor size N serves as the Renormalization Group s... |
2009.14819 | Qin Fei | Qin Fei, Zhu Yi, Yingjie Yang | The Reconstruction of Non-Minimal Derivative Coupling Inflationary
Potentials | 12 pages, 3 figures | Universe 2020, 6(11), 213 | 10.3390/universe6110213 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the reconstruction formulae for the inflation model with the
non-minimal derivative coupling term. If reconstructing the potential from the
tensor-to-scalar ratio, we could obtain the potential without using the high
friction limit. As an example, we reconstruct the potential from the
parametrization $r=8\a... | [
{
"created": "Wed, 30 Sep 2020 17:48:55 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Nov 2020 07:22:59 GMT",
"version": "v2"
}
] | 2020-11-23 | [
[
"Fei",
"Qin",
""
],
[
"Yi",
"Zhu",
""
],
[
"Yang",
"Yingjie",
""
]
] | We derive the reconstruction formulae for the inflation model with the non-minimal derivative coupling term. If reconstructing the potential from the tensor-to-scalar ratio, we could obtain the potential without using the high friction limit. As an example, we reconstruct the potential from the parametrization $r=8\alp... |
gr-qc/0103105 | Sergey Alexandrov | S. Alexandrov and D. Vassilevich | Area spectrum in Lorentz covariant loop gravity | 12 pages, RevTEX; improved layout, typos corrected, references added;
changes in the discussion in sec. IIIB and V | Phys.Rev. D64 (2001) 044023 | 10.1103/PhysRevD.64.044023 | SPhT/01/035, LPTENS-01/15, LU-ITP 2001/009 | gr-qc | null | We use the manifestly Lorentz covariant canonical formalism to evaluate
eigenvalues of the area operator acting on Wilson lines. To this end we modify
the standard definition of the loop states to make it applicable to the present
case of non-commutative connections. The area operator is diagonalized by using
the usu... | [
{
"created": "Wed, 28 Mar 2001 16:46:05 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Mar 2001 12:16:07 GMT",
"version": "v2"
},
{
"created": "Thu, 3 May 2001 14:02:03 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Alexandrov",
"S.",
""
],
[
"Vassilevich",
"D.",
""
]
] | We use the manifestly Lorentz covariant canonical formalism to evaluate eigenvalues of the area operator acting on Wilson lines. To this end we modify the standard definition of the loop states to make it applicable to the present case of non-commutative connections. The area operator is diagonalized by using the usual... |
2011.12186 | Sebastian Szybka | Sebastian J. Szybka | Black Hole Flyby | 7 pages, 3 figures; changes to match published version | Am. J. Phys. 89, 783 (2021) | 10.1119/10.0004305 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the minimum distance at which one may approach a black hole in a
free flyby. It corresponds to r=4m for the Schwarzschild black hole and a probe
which was non-relativistic at infinity. The problem is formulated in a way that
is useful for teaching introductory general relativity.
| [
{
"created": "Tue, 24 Nov 2020 16:15:18 GMT",
"version": "v1"
},
{
"created": "Sun, 31 Oct 2021 16:46:46 GMT",
"version": "v2"
}
] | 2021-11-02 | [
[
"Szybka",
"Sebastian J.",
""
]
] | We calculate the minimum distance at which one may approach a black hole in a free flyby. It corresponds to r=4m for the Schwarzschild black hole and a probe which was non-relativistic at infinity. The problem is formulated in a way that is useful for teaching introductory general relativity. |
2105.12223 | Remigiusz Durka | R. Durka, J. Kowalski-Glikman | Corners of gravity: the case of gravity as a constrained BF theory | 24 pages | null | 10.1007/JHEP07(2021)181 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Following recent works on corner charges we investigate the boundary
structure in the case of the theory of gravity formulated as a constrained BF
theory. This allows us not only to introduce the cosmological constant, but
also explore the influence of the topological terms present in the action of
this theory. Estab... | [
{
"created": "Tue, 25 May 2021 21:33:58 GMT",
"version": "v1"
}
] | 2021-08-18 | [
[
"Durka",
"R.",
""
],
[
"Kowalski-Glikman",
"J.",
""
]
] | Following recent works on corner charges we investigate the boundary structure in the case of the theory of gravity formulated as a constrained BF theory. This allows us not only to introduce the cosmological constant, but also explore the influence of the topological terms present in the action of this theory. Establi... |
1101.4939 | Drew Keppel | Kipp Cannon and Chad Hanna and Drew Keppel | Efficiently enclosing the compact binary parameter space by
singular-value decomposition | 5 pages, 6 figures | Phys. Rev. D 84, 084003 (2011) | 10.1103/PhysRevD.84.084003 | LIGO-P1000039-v2 | gr-qc physics.data-an | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave searches for the merger of compact binaries use
matched-filtering as the method of detecting signals and estimating parameters.
Such searches construct a fine mesh of filters covering a signal parameter
space at high density. Previously it has been shown that singular value
decomposition can reduce... | [
{
"created": "Tue, 25 Jan 2011 21:00:05 GMT",
"version": "v1"
}
] | 2012-08-06 | [
[
"Cannon",
"Kipp",
""
],
[
"Hanna",
"Chad",
""
],
[
"Keppel",
"Drew",
""
]
] | Gravitational-wave searches for the merger of compact binaries use matched-filtering as the method of detecting signals and estimating parameters. Such searches construct a fine mesh of filters covering a signal parameter space at high density. Previously it has been shown that singular value decomposition can reduce t... |
2210.04481 | Le\"ila Haegel | Le\"ila Haegel, Kellie O'Neal-Ault, Quentin G. Bailey, Jay D. Tasson,
Malachy Bloom, Lijing Shao | Search for anisotropic, birefringent spacetime-symmetry breaking in
gravitational wave propagation from GWTC-3 | null | Phys.Rev.D 107 (2023) 6, 064031 | 10.1103/PhysRevD.107.064031 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | An effective field theory framework, the Standard-Model Extension, is used to
investigate the existence of Lorentz and CPT-violating effects during
gravitational wave propagation. We implement a modified equation for the
dispersion of gravitational waves, that includes isotropic, anisotropic and
birefringent dispersi... | [
{
"created": "Mon, 10 Oct 2022 08:13:46 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Sep 2023 13:41:25 GMT",
"version": "v2"
}
] | 2023-09-08 | [
[
"Haegel",
"Leïla",
""
],
[
"O'Neal-Ault",
"Kellie",
""
],
[
"Bailey",
"Quentin G.",
""
],
[
"Tasson",
"Jay D.",
""
],
[
"Bloom",
"Malachy",
""
],
[
"Shao",
"Lijing",
""
]
] | An effective field theory framework, the Standard-Model Extension, is used to investigate the existence of Lorentz and CPT-violating effects during gravitational wave propagation. We implement a modified equation for the dispersion of gravitational waves, that includes isotropic, anisotropic and birefringent dispersion... |
2107.05316 | Po-Ning Chen | Po-Ning Chen, Mu-Tao Wang, Ye-Kai Wang, and Shing-Tung Yau | BMS charges without supertranslation ambiguity | 41 pages | null | 10.1007/s00220-022-04390-1 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The asymptotic symmetry of an isolated gravitating system, or the
Bondi-Metzner-Sachs (BMS) group, contains an infinite-dimensional subgroup of
supertranslations. Despite decades of study, the difficulties with the
"supertranslation ambiguity" persisted in making sense of fundamental notions
such as the angular momen... | [
{
"created": "Mon, 12 Jul 2021 11:05:12 GMT",
"version": "v1"
}
] | 2023-08-02 | [
[
"Chen",
"Po-Ning",
""
],
[
"Wang",
"Mu-Tao",
""
],
[
"Wang",
"Ye-Kai",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | The asymptotic symmetry of an isolated gravitating system, or the Bondi-Metzner-Sachs (BMS) group, contains an infinite-dimensional subgroup of supertranslations. Despite decades of study, the difficulties with the "supertranslation ambiguity" persisted in making sense of fundamental notions such as the angular momentu... |
0712.1600 | Miguel Lorente | Miguel Lorente | Causal spin foams and the ontology of spacetime | Communication presented to the Second International Conference on the
Ontology of Spacetime, 9-11, June 2006, Concordia University, Montreal.
Latex. 22 pages | null | null | null | gr-qc | null | We present some modern theories on the structure of spacetime that can be
classified as relational theories in the direction of Leibniz's ontology. In
order to analyze the nature of spacetime we consider three levels of knowledge
-observational, theoretical and ontological- to which the different models can
be adscri... | [
{
"created": "Mon, 10 Dec 2007 21:09:17 GMT",
"version": "v1"
}
] | 2007-12-12 | [
[
"Lorente",
"Miguel",
""
]
] | We present some modern theories on the structure of spacetime that can be classified as relational theories in the direction of Leibniz's ontology. In order to analyze the nature of spacetime we consider three levels of knowledge -observational, theoretical and ontological- to which the different models can be adscribe... |
1305.1484 | Jose Geraldo Pereira | C. S. O. Mayor, G. Otalora and J. G. Pereira | Conformal and gauge invariant spin-2 field equations | 12 pages, no figures; accepted for publication in Gravitation &
Cosmology | Grav. & Cosm. 19 (2013) 163 - 170 | 10.1134/S0202289313030079 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using an approach based on the Casimir operators of the de Sitter group, the
conformal invariant equations for a fundamental spin-2 field are obtained, and
their consistency discussed. It is shown that, only when the spin-2 field is
interpreted as a 1-form assuming values in the Lie algebra of the translation
group, ... | [
{
"created": "Tue, 7 May 2013 12:16:41 GMT",
"version": "v1"
}
] | 2013-08-29 | [
[
"Mayor",
"C. S. O.",
""
],
[
"Otalora",
"G.",
""
],
[
"Pereira",
"J. G.",
""
]
] | Using an approach based on the Casimir operators of the de Sitter group, the conformal invariant equations for a fundamental spin-2 field are obtained, and their consistency discussed. It is shown that, only when the spin-2 field is interpreted as a 1-form assuming values in the Lie algebra of the translation group, ra... |
2210.05259 | Tao Zhu | Tao Zhu, Wen Zhao, and Anzhong Wang | Polarized primordial gravitational waves in spatial covariant gravities | 11 pages. arXiv admin note: text overlap with arXiv:1911.01580; v2:
version to appear in PRD | null | 10.1103/PhysRevD.107.024031 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | The spatial covariant gravities provide a natural way to including odd-order
spatial derivative terms into the gravitational action, which breaks the parity
symmetry at gravitational sector. A lot of parity-violating scalar-tensor
theories can be mapped to the spatial covariant framework by imposing the
unitary gauge... | [
{
"created": "Tue, 11 Oct 2022 08:42:01 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jan 2023 06:46:36 GMT",
"version": "v2"
}
] | 2023-02-08 | [
[
"Zhu",
"Tao",
""
],
[
"Zhao",
"Wen",
""
],
[
"Wang",
"Anzhong",
""
]
] | The spatial covariant gravities provide a natural way to including odd-order spatial derivative terms into the gravitational action, which breaks the parity symmetry at gravitational sector. A lot of parity-violating scalar-tensor theories can be mapped to the spatial covariant framework by imposing the unitary gauge. ... |
1004.5057 | Yi Xie | Xin Wu (Nanchang University) and Yi Xie (Nanjing University) | Revisit on "Ruling out chaos in compact binary systems" | 5 pages, 3 figures | Phys. Rev. D 76, 124004 (2007) | 10.1103/PhysRevD.76.124004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Full general relativity requires that chaos indicators should be invariant in
various spacetime coordinate systems for a given relativistic dynamical
problem. On the basis of this point, we calculate the invariant Lyapunov
exponents (LEs) for one of the spinning compact binaries in the conservative
second post-Newton... | [
{
"created": "Wed, 28 Apr 2010 15:11:14 GMT",
"version": "v1"
}
] | 2010-04-29 | [
[
"Wu",
"Xin",
"",
"Nanchang University"
],
[
"Xie",
"Yi",
"",
"Nanjing University"
]
] | Full general relativity requires that chaos indicators should be invariant in various spacetime coordinate systems for a given relativistic dynamical problem. On the basis of this point, we calculate the invariant Lyapunov exponents (LEs) for one of the spinning compact binaries in the conservative second post-Newtonia... |
gr-qc/0512023 | Charles Wang | Charles H.-T. Wang | Towards conformal loop quantum gravity | 6 pages, 1 figure, LaTeX with jpconf.cls and jpconf11.clo, Talk given
at Constrained Dynamics and Quantum Gravity 05, Cala Gonone, Sardinia, Italy,
12-16 September 2005 | J.Phys.Conf.Ser.33:285-290,2006 | 10.1088/1742-6596/33/1/032 | null | gr-qc hep-th | null | A discussion is given of recent developments in canonical gravity that
assimilates the conformal analysis of gravitational degrees of freedom. The
work is motivated by the problem of time in quantum gravity and is carried out
at the metric and the triad levels. At the metric level, it is shown that by
extending the A... | [
{
"created": "Mon, 5 Dec 2005 15:22:59 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Wang",
"Charles H. -T.",
""
]
] | A discussion is given of recent developments in canonical gravity that assimilates the conformal analysis of gravitational degrees of freedom. The work is motivated by the problem of time in quantum gravity and is carried out at the metric and the triad levels. At the metric level, it is shown that by extending the Arn... |
gr-qc/0604048 | Michele Maggiore | Florian Dubath and Michele Maggiore | Upper limits on the gravitational mass loss of the Galaxy and the LIGO
burst searches | 3pages, 2 figures, numerical factor corrected in eqs (12), (13) | Phys.Rev. D74 (2006) 063008 | 10.1103/PhysRevD.74.063008 | null | gr-qc | null | We discuss the relevance, for the search of gravitational-wave bursts, of
upper limits on the total mass loss of the Galaxy which come from various
astronomical observations. For sub-millisecond bursts we obtain limits on the
event rate, as a function of the GW amplitude, which are stronger than the
corresponding upp... | [
{
"created": "Mon, 10 Apr 2006 15:39:56 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Aug 2006 13:59:37 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Dubath",
"Florian",
""
],
[
"Maggiore",
"Michele",
""
]
] | We discuss the relevance, for the search of gravitational-wave bursts, of upper limits on the total mass loss of the Galaxy which come from various astronomical observations. For sub-millisecond bursts we obtain limits on the event rate, as a function of the GW amplitude, which are stronger than the corresponding upper... |
1511.04489 | Sergio Dain | Pablo Anglada, Sergio Dain, Omar E. Ortiz | The inequality between size and charge in spherical symmetry | 34 pages, 10 figures. Added references. New example in section 3.3 | Phys. Rev. D 93, 044055 (2016) | 10.1103/PhysRevD.93.044055 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that for a spherically symmetric charged body two times the radius
is always strictly greater than the charge of the body. We also prove that this
inequality is sharp. Finally, we discuss the physical implications of this
geometrical inequality and present numerical examples that illustrate this
theorem.
| [
{
"created": "Sat, 14 Nov 2015 01:19:46 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Dec 2015 12:47:08 GMT",
"version": "v2"
}
] | 2016-03-02 | [
[
"Anglada",
"Pablo",
""
],
[
"Dain",
"Sergio",
""
],
[
"Ortiz",
"Omar E.",
""
]
] | We prove that for a spherically symmetric charged body two times the radius is always strictly greater than the charge of the body. We also prove that this inequality is sharp. Finally, we discuss the physical implications of this geometrical inequality and present numerical examples that illustrate this theorem. |
gr-qc/0209037 | Philippe Droz-Vincent | Philippe Droz-Vincent (LUTH, Meudon, France) | Invariant quantization in warped spacetimes | LaTeX, 26 pages, no figure | null | null | null | gr-qc math-ph math.MP | null | We argue that quantum theory in curved spacetime should be invariant under
the continuous spacetime symmetries thaat are connected with the identity. For
typical warped-product spacetimes, we prove that such invariance can be
actually implemented, at least at the level of first quantization. Our approach
rests on a m... | [
{
"created": "Wed, 11 Sep 2002 15:07:53 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Droz-Vincent",
"Philippe",
"",
"LUTH, Meudon, France"
]
] | We argue that quantum theory in curved spacetime should be invariant under the continuous spacetime symmetries thaat are connected with the identity. For typical warped-product spacetimes, we prove that such invariance can be actually implemented, at least at the level of first quantization. Our approach rests on a mod... |
1008.1618 | Tomohiro Takahashi | Tomohiro Takahashi, Jiro Soda | Catastrophic Instability of Small Lovelock Black Holes | 23 pages, 3 figures; v2: references added | Prog.Theor.Phys.124:711-729,2010 | 10.1143/PTP.124.711 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the stability of static black holes in Lovelock theory which is a
natural higher dimensional generalization of Einstein theory. We show that
Lovelock black holes are stable under vector perturbations in all dimensions.
However, we prove that small Lovelock black holes are unstable under tensor
perturbations ... | [
{
"created": "Tue, 10 Aug 2010 01:54:43 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Aug 2010 00:03:50 GMT",
"version": "v2"
}
] | 2011-02-03 | [
[
"Takahashi",
"Tomohiro",
""
],
[
"Soda",
"Jiro",
""
]
] | We study the stability of static black holes in Lovelock theory which is a natural higher dimensional generalization of Einstein theory. We show that Lovelock black holes are stable under vector perturbations in all dimensions. However, we prove that small Lovelock black holes are unstable under tensor perturbations in... |
1512.05760 | Leonardo Pati\~no | Leonardo Pati\~no and Jessica S\"ohle | About the tensorial nature of the Christoffel symbols, or lack thereof | Body of the paper in Spanish | Rev. Mex. Fis. E 62(1) (2016) 31 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | From the first approach to General Relativity we learn about the Christoffel
symbols, and it is easy to notice that their coordinated components do not
transform as a tensor. It is then confusing to find renowned books on the
subject that refer to these symbols as if they were indeed a tensor. A
prominent example of ... | [
{
"created": "Mon, 14 Dec 2015 20:56:58 GMT",
"version": "v1"
}
] | 2015-12-18 | [
[
"Patiño",
"Leonardo",
""
],
[
"Söhle",
"Jessica",
""
]
] | From the first approach to General Relativity we learn about the Christoffel symbols, and it is easy to notice that their coordinated components do not transform as a tensor. It is then confusing to find renowned books on the subject that refer to these symbols as if they were indeed a tensor. A prominent example of su... |
1804.08577 | Takahiro Terada | Kazunori Kohri and Takahiro Terada | Semianalytic Calculation of Gravitational Wave Spectrum Nonlinearly
Induced from Primordial Curvature Perturbations | 28 pages, 4 figures; published version | Phys. Rev. D 97, 123532 (2018) | 10.1103/PhysRevD.97.123532 | KEK-TH-2046, KEK-Cosmo-223 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Whether or not the primordial gravitational wave (GW) produced during
inflation is sufficiently strong to be observable, GWs are necessarily produced
from the primordial curvature perturbations in the second order of
perturbation. The induced GWs can be enhanced by curvature perturbations
enhanced at small scales or ... | [
{
"created": "Mon, 23 Apr 2018 17:16:37 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Jun 2018 02:30:22 GMT",
"version": "v2"
}
] | 2018-07-02 | [
[
"Kohri",
"Kazunori",
""
],
[
"Terada",
"Takahiro",
""
]
] | Whether or not the primordial gravitational wave (GW) produced during inflation is sufficiently strong to be observable, GWs are necessarily produced from the primordial curvature perturbations in the second order of perturbation. The induced GWs can be enhanced by curvature perturbations enhanced at small scales or by... |
1509.03095 | Martin Schaden | Martin Schaden | Causal Space-Times on a Null Lattice | Greatly improved version, new numerics, appendices, etc.. 42 pages,
14 figures; This paper by Dr. Martin Schaden, the Author, remains unpublished
as he passed away suddenly on July 14, 2016 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I investigate a discrete model of quantum gravity on a causal null-lattice
with \SLC structure group. The description is geometric and foliates in a
causal and physically transparent manner. The general observables of this model
are constructed from local Lorentz symmetry considerations only. For smooth
configuration... | [
{
"created": "Thu, 10 Sep 2015 11:06:10 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Mar 2016 01:58:47 GMT",
"version": "v2"
}
] | 2023-04-04 | [
[
"Schaden",
"Martin",
""
]
] | I investigate a discrete model of quantum gravity on a causal null-lattice with \SLC structure group. The description is geometric and foliates in a causal and physically transparent manner. The general observables of this model are constructed from local Lorentz symmetry considerations only. For smooth configurations,... |
1505.04621 | Chris Van Den Broeck | C. Van Den Broeck (for the LIGO Scientific Collaboration, the Virgo
Collaboration) | Gravitational wave searches with Advanced LIGO and Advanced Virgo | 8 pages. To appear in Proceedings of the 50th Rencontres de Moriond,
"Gravitation: 100 years after GR" | null | null | LIGO document number P1500064, Virgo document number VIR-0222A-15 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Advanced LIGO and Advanced Virgo are expected to make the first direct
detections of gravitational waves (GW) in the next several years. Possible
types of GW emission include short-duration bursts, signals from the
coalescence of compact binaries consisting of neutron stars or black holes,
continuous radiation from f... | [
{
"created": "Mon, 18 May 2015 13:09:41 GMT",
"version": "v1"
}
] | 2019-08-15 | [
[
"Broeck",
"C. Van Den",
"",
"for the LIGO Scientific Collaboration, the Virgo\n Collaboration"
]
] | Advanced LIGO and Advanced Virgo are expected to make the first direct detections of gravitational waves (GW) in the next several years. Possible types of GW emission include short-duration bursts, signals from the coalescence of compact binaries consisting of neutron stars or black holes, continuous radiation from fas... |
1411.4167 | Emrah Birsin | E. Birsin, W. Hasse | Some optical and dynamical phenomena in the Rindler model | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Rindler's model of a uniformly accelerated reference frame we analyze the
apparent shape of rods and marked light rays for the case that the observers as
well as the rods and the sources of light are at rest with respect to the
Rindler observers. Contrary to the expectation suggested by the strong
principle of equ... | [
{
"created": "Sat, 15 Nov 2014 17:35:13 GMT",
"version": "v1"
}
] | 2014-11-18 | [
[
"Birsin",
"E.",
""
],
[
"Hasse",
"W.",
""
]
] | In Rindler's model of a uniformly accelerated reference frame we analyze the apparent shape of rods and marked light rays for the case that the observers as well as the rods and the sources of light are at rest with respect to the Rindler observers. Contrary to the expectation suggested by the strong principle of equiv... |
1903.07374 | Ozgur Acik | \"Ozg\"ur A\c{c}{\i}k, Aytolun \c{C}atalkaya, \"Umit Ertem, \"Ozg\"un
S\"utemen | Motion of membranes in space-times with torsion | 20 pages | Class. Quantum Grav. 36 (2019) 195010 | 10.1088/1361-6382/ab3a12 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The motion of membranes interacting with external fields in space-times with
curvature and torsion is considered. The intrinsic and extrinsic properties of
the immersion are fused together to form a stress tensor for the corresponding
material hypersurface. This geometro-elastic stress tensor is part of the total
str... | [
{
"created": "Mon, 18 Mar 2019 11:46:43 GMT",
"version": "v1"
}
] | 2019-10-15 | [
[
"Açık",
"Özgür",
""
],
[
"Çatalkaya",
"Aytolun",
""
],
[
"Ertem",
"Ümit",
""
],
[
"Sütemen",
"Özgün",
""
]
] | The motion of membranes interacting with external fields in space-times with curvature and torsion is considered. The intrinsic and extrinsic properties of the immersion are fused together to form a stress tensor for the corresponding material hypersurface. This geometro-elastic stress tensor is part of the total stres... |
1905.08524 | Aur\'elien Hees | A. Hees and O. Minazzoli and E. Savalle and Y. V. Stadnik and P. Wolf
and B. Roberts | Violation of the equivalence principle from light scalar fields: from
Dark Matter candidates to scalarized black holes | 8 pages, 1 figure, contribution to the 2019 Gravitation session of
the 54th Rencontres de Moriond | null | null | null | gr-qc astro-ph.GA hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Tensor-scalar theory is a wide class of alternative theory of gravitation
that can be motivated by higher dimensional theories, by models of dark matter
or dark ernergy. In the general case, the scalar field will couple
non-universally to matter producing a violation of the equivalence principle.
In this communicatio... | [
{
"created": "Tue, 21 May 2019 09:57:13 GMT",
"version": "v1"
}
] | 2019-05-22 | [
[
"Hees",
"A.",
""
],
[
"Minazzoli",
"O.",
""
],
[
"Savalle",
"E.",
""
],
[
"Stadnik",
"Y. V.",
""
],
[
"Wolf",
"P.",
""
],
[
"Roberts",
"B.",
""
]
] | Tensor-scalar theory is a wide class of alternative theory of gravitation that can be motivated by higher dimensional theories, by models of dark matter or dark ernergy. In the general case, the scalar field will couple non-universally to matter producing a violation of the equivalence principle. In this communication,... |
2010.05092 | Shao-Jun Zhang | Shao-Jun Zhang, Bin Wang, Anzhong Wang and Joel F. Saavedra | Object picture of scalar field perturbation on Kerr black hole in
scalar-Einstein-Gauss-Bonnet theory | v1:22 pages, 8 figures; v2: minor modifications, refs added,
published version | Phys. Rev. D 102, 124056 (2020) | 10.1103/PhysRevD.102.124056 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar perturbations around the Kerr black hole in
scalar-Einstein-Gauss-Bonnet (sEGB) theory are studied in the time domain. To
overcome the "outer boundary problem" that usually encountered in traditional
numerical calculations, we apply the hyperboloidal compactification technique
to perform a $(2+1)$-dimensional ... | [
{
"created": "Sat, 10 Oct 2020 21:09:51 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Dec 2020 22:54:18 GMT",
"version": "v2"
}
] | 2021-01-04 | [
[
"Zhang",
"Shao-Jun",
""
],
[
"Wang",
"Bin",
""
],
[
"Wang",
"Anzhong",
""
],
[
"Saavedra",
"Joel F.",
""
]
] | Scalar perturbations around the Kerr black hole in scalar-Einstein-Gauss-Bonnet (sEGB) theory are studied in the time domain. To overcome the "outer boundary problem" that usually encountered in traditional numerical calculations, we apply the hyperboloidal compactification technique to perform a $(2+1)$-dimensional si... |
gr-qc/0207043 | Carlo Rovelli | Carlo Rovelli | Covariant hamiltonian formalism for field theory: Hamilton-Jacobi
equation on the space G | 19 pages, no figures | Lect.Notes Phys.633:36-62,2003 | 10.1007/978-3-540-40968-7_4 | null | gr-qc | null | Hamiltonian mechanics of field theory can be formulated in a generally
covariant and background independent manner over a finite dimensional extended
configuration space. The physical symplectic structure of the theory can then
be defined over a space G of three-dimensional surfaces without boundary, in
the extended ... | [
{
"created": "Wed, 10 Jul 2002 11:12:36 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Jul 2002 15:30:35 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Rovelli",
"Carlo",
""
]
] | Hamiltonian mechanics of field theory can be formulated in a generally covariant and background independent manner over a finite dimensional extended configuration space. The physical symplectic structure of the theory can then be defined over a space G of three-dimensional surfaces without boundary, in the extended co... |
0712.1674 | Lukasz Andrzej Glinka | L.A. Glinka | On quantum cosmology as field theory of bosonic string mass groundstate | 5 pages, twocolumn revtex format;
http://www.serialspublications.com/contentnormal.asp?jid=501&jtype=1;
Published as Int.J.Phys.2:79-88,2009 with no author's approval. Paper
rejected from the journal after author's intervention email | Oriental Journal of Physics 3(1), 1-10 (2011) | null | null | gr-qc cond-mat.stat-mech hep-th math-ph math.MP | null | The Quantum Cosmology can be understand as the theory of an one object that
is the Universe described in terms of fundamental mass groundstate of the free
boson string, that is a tachyon - a hypothetical particle with negative mass
square, which has linear velocity more than the velocity of light c. From this
fact it... | [
{
"created": "Tue, 11 Dec 2007 17:09:08 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Dec 2007 15:51:55 GMT",
"version": "v2"
}
] | 2012-03-05 | [
[
"Glinka",
"L. A.",
""
]
] | The Quantum Cosmology can be understand as the theory of an one object that is the Universe described in terms of fundamental mass groundstate of the free boson string, that is a tachyon - a hypothetical particle with negative mass square, which has linear velocity more than the velocity of light c. From this fact it i... |
2109.03852 | Anna Nakonieczna | Anna Nakonieczna, {\L}ukasz Nakonieczny | Gravitational collapse involving electric charge in the decoupling limit
of the dilatonic Gauss--Bonnet gravity | 24 pages, 18 figures. arXiv admin note: text overlap with
arXiv:2009.01600 | Eur. Phys. J. C (2022) 82:294 | 10.1140/epjc/s10052-022-10257-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper discusses a collapse of a self-interacting electrically charged
scalar field in the decoupling limit of the dilatonic Gauss-Bonnet gravity. The
emerging spacetimes were either non-singular or singular and containing black
holes of a Schwarzschild type. A size of the region, in which the gravitational
dynami... | [
{
"created": "Wed, 8 Sep 2021 18:08:10 GMT",
"version": "v1"
}
] | 2022-10-18 | [
[
"Nakonieczna",
"Anna",
""
],
[
"Nakonieczny",
"Łukasz",
""
]
] | The paper discusses a collapse of a self-interacting electrically charged scalar field in the decoupling limit of the dilatonic Gauss-Bonnet gravity. The emerging spacetimes were either non-singular or singular and containing black holes of a Schwarzschild type. A size of the region, in which the gravitational dynamics... |
1609.08306 | Li-Ming Cao | Rong-Gen Cai and Li-Ming Cao | Mechanics of Apparent Horizon in Two Dimensional Dilaton Gravity | 11 pages, no figure, to celebrate the 60 birthday of Prof. T.
Padmanabhan | null | null | USTC-ICTS-16-16 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we give a definition of apparent horizon in a two
dimensional general dilaton gravity theory. With this definition, we construct
the mechanics of the apparent horizon by introducing a quasi-local energy of
the theory. Our discussion generalizes the apparent horizons mechanics in
general spherically s... | [
{
"created": "Tue, 27 Sep 2016 08:17:49 GMT",
"version": "v1"
}
] | 2016-09-28 | [
[
"Cai",
"Rong-Gen",
""
],
[
"Cao",
"Li-Ming",
""
]
] | In this article, we give a definition of apparent horizon in a two dimensional general dilaton gravity theory. With this definition, we construct the mechanics of the apparent horizon by introducing a quasi-local energy of the theory. Our discussion generalizes the apparent horizons mechanics in general spherically sym... |
gr-qc/0205064 | Jorge Pullin | Olivier Sarbach, Gioel Calabrese, Jorge Pullin, Manuel Tiglio | Hyperbolicity of the BSSN system of Einstein evolution equations | 7 Pages, RevTex, no figures | Phys.Rev. D66 (2002) 064002 | 10.1103/PhysRevD.66.064002 | LSU-REL-051502 | gr-qc | null | We discuss an equivalence between the Baumgarte-Shapiro-Shibata-Nakamura
(BSSN) formulation of the Einstein evolution equations, a subfamiliy of the
Kidder--Scheel--Teukolsky formulation, and other strongly or symmetric
hyperbolic first order systems with fixed shift and densitized lapse. This
allows us to show under... | [
{
"created": "Wed, 15 May 2002 22:46:14 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Sarbach",
"Olivier",
""
],
[
"Calabrese",
"Gioel",
""
],
[
"Pullin",
"Jorge",
""
],
[
"Tiglio",
"Manuel",
""
]
] | We discuss an equivalence between the Baumgarte-Shapiro-Shibata-Nakamura (BSSN) formulation of the Einstein evolution equations, a subfamiliy of the Kidder--Scheel--Teukolsky formulation, and other strongly or symmetric hyperbolic first order systems with fixed shift and densitized lapse. This allows us to show under w... |
2207.05215 | Marco Paula | Marco A. A. de Paula, Luiz C. S. Leite, Lu\'is C. B. Crispino | Scattering properties of charged black holes in nonlinear and Maxwell's
electrodynamics | 11 pages, 14 figures, published in European Physical Journal Plus | Eur. Phys. J. Plus 137, 785 (2022) | 10.1140/epjp/s13360-022-02916-z | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the scattering properties of a massless scalar field in the
background of a charged Ay\'on-Beato-Garc\'ia regular black hole solution.
Using a numerical approach, we compute the differential scattering cross
section for arbitrary values of the scattering angle and of the incident wave
frequency. We com... | [
{
"created": "Mon, 11 Jul 2022 22:33:32 GMT",
"version": "v1"
}
] | 2022-07-13 | [
[
"de Paula",
"Marco A. A.",
""
],
[
"Leite",
"Luiz C. S.",
""
],
[
"Crispino",
"Luís C. B.",
""
]
] | We investigate the scattering properties of a massless scalar field in the background of a charged Ay\'on-Beato-Garc\'ia regular black hole solution. Using a numerical approach, we compute the differential scattering cross section for arbitrary values of the scattering angle and of the incident wave frequency. We compa... |
2405.12050 | Damiano Anselmi | Damiano Anselmi | Cosmological inhomogeneities, primordial black holes, and a hypothesis
on the death of the universe | 41 pages | null | null | null | gr-qc astro-ph.CO astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the impact of the expansion of the universe on a broad class of
objects, including black holes, neutron stars, white dwarfs, and others. Using
metrics that incorporate primordial inhomogeneities, the effects of a
hypothetical "center of the universe" on inflation are calculated. Dynamic
coordinates for black... | [
{
"created": "Mon, 20 May 2024 14:15:40 GMT",
"version": "v1"
}
] | 2024-05-21 | [
[
"Anselmi",
"Damiano",
""
]
] | We study the impact of the expansion of the universe on a broad class of objects, including black holes, neutron stars, white dwarfs, and others. Using metrics that incorporate primordial inhomogeneities, the effects of a hypothetical "center of the universe" on inflation are calculated. Dynamic coordinates for black h... |
1107.4627 | Carlos Molina Mendes | C. Molina, Prado Mart\'in-Moruno, Pedro F. Gonz\'alez-D\'iaz | Isotropic extensions of the vacuum solutions in general relativity | 12 pages, 6 figures. Version to be published in Physical Review D | Phys. Rev. D 84, 104013 (2011) | 10.1103/PhysRevD.84.104013 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we obtain isotropic extensions of the usual spherically
symmetric vacuum geometries in general relativity. Exact and perturbative
solutions are derived. The classes of geometries obtained include black holes
in compact and noncompact universes, wormholes in the interior region of
cosmological horizons, ... | [
{
"created": "Fri, 22 Jul 2011 20:51:09 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Oct 2011 14:16:56 GMT",
"version": "v2"
}
] | 2012-06-04 | [
[
"Molina",
"C.",
""
],
[
"Martín-Moruno",
"Prado",
""
],
[
"González-Díaz",
"Pedro F.",
""
]
] | In this work, we obtain isotropic extensions of the usual spherically symmetric vacuum geometries in general relativity. Exact and perturbative solutions are derived. The classes of geometries obtained include black holes in compact and noncompact universes, wormholes in the interior region of cosmological horizons, an... |
1402.3121 | Grasiele Batista Dos Santos | Eduardo Bittencourt, Jos\'e Salim and Grasiele B. dos Santos | Magnetic fields and the Weyl tensor in the early universe | 10 pages, 2 figures, new conceptual treatment of the early
phenomenological work arXiv:1301.3079. Matches published version | Gen Relativ Gravit (2014) 46: 1790 | 10.1007/s10714-014-1790-3 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have solved the Einstein-Maxwell equations for a class of isotropic
metrics with constant spatial curvature in the presence of magnetic fields. We
consider a slight modification of the Tolman averaging relations so that the
energy-momentum tensor of the electromagnetic field possesses an anisotropic
pressure compo... | [
{
"created": "Thu, 13 Feb 2014 13:22:58 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Sep 2014 07:55:32 GMT",
"version": "v2"
}
] | 2014-09-11 | [
[
"Bittencourt",
"Eduardo",
""
],
[
"Salim",
"José",
""
],
[
"Santos",
"Grasiele B. dos",
""
]
] | We have solved the Einstein-Maxwell equations for a class of isotropic metrics with constant spatial curvature in the presence of magnetic fields. We consider a slight modification of the Tolman averaging relations so that the energy-momentum tensor of the electromagnetic field possesses an anisotropic pressure compone... |
1210.1496 | Gunter Scharf | G\"unter Scharf | Nonstandard general relativity II | 10 pages, no figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study Einstein's equations with matter in hydrostatic equilibrium in the
nonstandard gauge which was recently investigated in the vacuum case. We obtain
spherically symmetric solutions for any given rotation curve. These solutions
can be used to describe the bulge of a galaxy without assuming dark matter.
| [
{
"created": "Thu, 4 Oct 2012 15:46:48 GMT",
"version": "v1"
},
{
"created": "Sat, 1 Dec 2012 12:49:14 GMT",
"version": "v2"
}
] | 2012-12-04 | [
[
"Scharf",
"Günter",
""
]
] | We study Einstein's equations with matter in hydrostatic equilibrium in the nonstandard gauge which was recently investigated in the vacuum case. We obtain spherically symmetric solutions for any given rotation curve. These solutions can be used to describe the bulge of a galaxy without assuming dark matter. |
1409.2349 | P Ajith | Vijay Varma, Parameswaran Ajith, Sascha Husa, Juan Calderon Bustillo,
Mark Hannam, Michael Puerrer | Gravitational-wave observations of binary black holes: Effect of
non-quadrupole modes | 11 pages, 9 figures, submitted to Phys. Rev. D | Phys. Rev. D 90, 124004 (2014) | 10.1103/PhysRevD.90.124004 | LIGO-P1400095-v3 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effect of non-quadrupolar modes in the detection and parameter
estimation of gravitational waves (GWs) from non-spinning black-hole binaries.
We evaluate the loss of signal-to-noise ratio and the systematic errors in the
estimated parameters when one uses a quadrupole-mode template family to detect
GW si... | [
{
"created": "Mon, 8 Sep 2014 14:04:25 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Sep 2014 07:23:01 GMT",
"version": "v2"
}
] | 2014-12-10 | [
[
"Varma",
"Vijay",
""
],
[
"Ajith",
"Parameswaran",
""
],
[
"Husa",
"Sascha",
""
],
[
"Bustillo",
"Juan Calderon",
""
],
[
"Hannam",
"Mark",
""
],
[
"Puerrer",
"Michael",
""
]
] | We study the effect of non-quadrupolar modes in the detection and parameter estimation of gravitational waves (GWs) from non-spinning black-hole binaries. We evaluate the loss of signal-to-noise ratio and the systematic errors in the estimated parameters when one uses a quadrupole-mode template family to detect GW sign... |
2006.11816 | Dnyaneshwar Pawar Dr | D. D. Pawar, D. K. Raut and W. D. Patil | Fractal FRW Model within Domain Wall | 17 pages 18 figures, International journal of Modern Physics A | Vol. 35, No.17 (2020), 2050072 | 10.1142/S0217751X20500724 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper an attempt has been made to study the flat fractal
Friedmann - Robertson - Walker model filled with domain walls. We have obtained
the fractal equation of deceleration parameter and tension of the domain wall.
It is observed that, while domain walls exist at early times, they disappear at
late ti... | [
{
"created": "Sun, 21 Jun 2020 14:50:10 GMT",
"version": "v1"
}
] | 2020-06-23 | [
[
"Pawar",
"D. D.",
""
],
[
"Raut",
"D. K.",
""
],
[
"Patil",
"W. D.",
""
]
] | In the present paper an attempt has been made to study the flat fractal Friedmann - Robertson - Walker model filled with domain walls. We have obtained the fractal equation of deceleration parameter and tension of the domain wall. It is observed that, while domain walls exist at early times, they disappear at late time... |
1211.6366 | Salvador Robles-Perez | Salvador J. Robles-P\'erez | Inter-universal entanglement | 36 pages, 7 figures. Chapter written for the book "Open Questions in
Cosmology", Edited by: Gonzalo J. Olmo, InTech Publishing, Rijeka, Croatia,
(2012), ISBN 978-953-51-0880-1. The properly formatted version can be freely
downloaded from the publisher's website | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum information theory and the multiverse are two of the greatest
outcomes of the XX century physics. The consideration of entanglement between
the quantum states of two or more universes in a multiverse scenario provides
us with a completely new paradigm that opens the door to novel approaches for
traditionally ... | [
{
"created": "Tue, 27 Nov 2012 17:28:35 GMT",
"version": "v1"
}
] | 2012-11-28 | [
[
"Robles-Pérez",
"Salvador J.",
""
]
] | Quantum information theory and the multiverse are two of the greatest outcomes of the XX century physics. The consideration of entanglement between the quantum states of two or more universes in a multiverse scenario provides us with a completely new paradigm that opens the door to novel approaches for traditionally un... |
1012.1784 | Surajit Chattopadhyay | Surajit Chattopadhyay (Pailan College of Management and Technology)
and Ujjal Debnath (Bengal Engineering and Science University, Shibpur) | Generalized second law of thermodynamics in presence of interacting
tachyonic field and scalar(phantom)field | 8 pages | Can.J.Phys.88:933-938,2010 | 10.1139/P10-094 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work, we have considered tachyonic field, phantom field and
scalar field in both interacting and non-interacting situations and
investigated the validity of the generalized second law of thermodynamics in a
flat FRW universe. We found that in all cases, excepting the phantom field
dominated universe, t... | [
{
"created": "Wed, 8 Dec 2010 15:23:28 GMT",
"version": "v1"
}
] | 2011-10-06 | [
[
"Chattopadhyay",
"Surajit",
"",
"Pailan College of Management and Technology"
],
[
"Debnath",
"Ujjal",
"",
"Bengal Engineering and Science University, Shibpur"
]
] | In the present work, we have considered tachyonic field, phantom field and scalar field in both interacting and non-interacting situations and investigated the validity of the generalized second law of thermodynamics in a flat FRW universe. We found that in all cases, excepting the phantom field dominated universe, the... |
1902.07721 | Jo\~ao M. Oliveira | Carlos A. R. Herdeiro, Jo\~ao M. S. Oliveira | On the inexistence of solitons in Einstein-Maxwell-scalar models | 23 pages, 1 figure; v3. Corrected minor typos and updated references.
Matches published version in CQG | null | 10.1088/1361-6382/ab1859 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Three non-existence results are established for self-gravitating solitons in
Einstein-Maxwell-scalar models, wherein the scalar field is, generically,
non-minimally coupled to the Maxwell field via a scalar function $f(\Phi)$.
Firstly, a trivial Maxwell field is considered, which yields a consistent
truncation of the... | [
{
"created": "Wed, 20 Feb 2019 19:00:03 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Mar 2019 17:41:01 GMT",
"version": "v2"
},
{
"created": "Thu, 25 Apr 2019 11:19:38 GMT",
"version": "v3"
}
] | 2019-04-26 | [
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Oliveira",
"João M. S.",
""
]
] | Three non-existence results are established for self-gravitating solitons in Einstein-Maxwell-scalar models, wherein the scalar field is, generically, non-minimally coupled to the Maxwell field via a scalar function $f(\Phi)$. Firstly, a trivial Maxwell field is considered, which yields a consistent truncation of the f... |
gr-qc/9405058 | Arlen Anderson | Arlen Anderson | Unitarity Restoration in the Presence of Closed Timelike Curves | LaTeX, 17pp, Revisions: Title change, expanded and clarified
presentation of original proposal, esp. with regard to Heisenberg picture and
remaining in original Hilbert space | Phys.Rev.D51:5707-5715,1995 | 10.1103/PhysRevD.51.5707 | Imperial/TP/93-94/41 | gr-qc | null | A proposal is made for a mathematically unambiguous treatment of evolution in
the presence of closed timelike curves. In constrast to other proposals for
handling the naively nonunitary evolution that is often present in such
situations, this proposal is causal, linear in the initial density matrix and
preserves prob... | [
{
"created": "Wed, 25 May 1994 15:54:00 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Nov 1994 18:17:08 GMT",
"version": "v2"
}
] | 2010-11-01 | [
[
"Anderson",
"Arlen",
""
]
] | A proposal is made for a mathematically unambiguous treatment of evolution in the presence of closed timelike curves. In constrast to other proposals for handling the naively nonunitary evolution that is often present in such situations, this proposal is causal, linear in the initial density matrix and preserves probab... |
2303.12815 | Behzad Eslam Panah | B. Eslam Panah, and M. E. Rodrigues | Topological phantom AdS black holes in $F(R)$ gravity | 10 pages, 5 figures, 1 table | Eur. Phys. J. C 83 (2023) 237 | 10.1140/epjc/s10052-023-11402-4 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we obtain exact phantom (A)dS black hole solutions in the
context of $F(R)$ gravity with topological spacetime in four dimensions. Then,
we study the effects of different parameters on the event horizon. In the
following, we calculate the conserved and thermodynamic quantities of the
system and check t... | [
{
"created": "Wed, 22 Mar 2023 05:38:43 GMT",
"version": "v1"
}
] | 2023-03-24 | [
[
"Panah",
"B. Eslam",
""
],
[
"Rodrigues",
"M. E.",
""
]
] | In this paper, we obtain exact phantom (A)dS black hole solutions in the context of $F(R)$ gravity with topological spacetime in four dimensions. Then, we study the effects of different parameters on the event horizon. In the following, we calculate the conserved and thermodynamic quantities of the system and check the... |
2403.01044 | Alex Koek | Valeri P. Frolov, Alex Koek | Motion of Rotating Black Holes in Homogeneous Scalar Fields: A General
Case | 11 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider the motion of a rotating black hole through a
static, homogeneous, massless scalar field. In the general case, a constant
vector of the field gradient can be timelike, spacelike or null. We consider
and compare all of these cases. We demonstrate that as a result of the
interaction of the bla... | [
{
"created": "Sat, 2 Mar 2024 00:28:08 GMT",
"version": "v1"
}
] | 2024-03-05 | [
[
"Frolov",
"Valeri P.",
""
],
[
"Koek",
"Alex",
""
]
] | In this paper we consider the motion of a rotating black hole through a static, homogeneous, massless scalar field. In the general case, a constant vector of the field gradient can be timelike, spacelike or null. We consider and compare all of these cases. We demonstrate that as a result of the interaction of the black... |
1812.08502 | Vyacheslav Dokuchaev | Victor Berezin, Vyacheslav Dokuchaev and Yury Eroshenko | Spherically symmetric double layers in Weyl+Einstein gravity | 18 pages, submitted to IJMPD | IJMPD 28 (2019) 1941007 | 10.1142/S0218271819410074 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main results are the following. We derived the matching conditions for
the spherically symmetric singular hypersurface (in our case it is equivalent
to the world line) in the Weyl$+$Einstein gravity. It was found, that the
residual extrinsic curvature tensor of this surface must be continuous on the
singular hype... | [
{
"created": "Thu, 20 Dec 2018 11:49:32 GMT",
"version": "v1"
}
] | 2019-12-02 | [
[
"Berezin",
"Victor",
""
],
[
"Dokuchaev",
"Vyacheslav",
""
],
[
"Eroshenko",
"Yury",
""
]
] | The main results are the following. We derived the matching conditions for the spherically symmetric singular hypersurface (in our case it is equivalent to the world line) in the Weyl$+$Einstein gravity. It was found, that the residual extrinsic curvature tensor of this surface must be continuous on the singular hypers... |
1712.00562 | Sumanta Chakraborty | Sajal Mukherjee and Sumanta Chakraborty | Horndeski theories confront the Gravity Probe B experiment | v2, Revised, 34 pages, 11 figures | Phys. Rev. D 97, 124007 (2018) | 10.1103/PhysRevD.97.124007 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we have investigated various properties of a spinning gyroscope
in the context of Horndeski theories. In particular, we have focused on two
specific situations --- (a) when the gyroscope follows a geodesic trajectory
and (b) when it is endowed with an acceleration. In both these cases, besides
developing... | [
{
"created": "Sat, 2 Dec 2017 07:25:13 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jun 2018 01:32:21 GMT",
"version": "v2"
}
] | 2018-06-08 | [
[
"Mukherjee",
"Sajal",
""
],
[
"Chakraborty",
"Sumanta",
""
]
] | In this work we have investigated various properties of a spinning gyroscope in the context of Horndeski theories. In particular, we have focused on two specific situations --- (a) when the gyroscope follows a geodesic trajectory and (b) when it is endowed with an acceleration. In both these cases, besides developing t... |
1506.05454 | Jose' P. S. Lemos | Jos\'e P. S. Lemos, Francisco J. Lopes, Masato Minamitsuji | Rotating thin shells in (2+1)-dimensional asymptotically AdS spacetimes:
Mechanical properties, Machian effects, and energy conditions | 13 pages | International Journal of Modern Physics D 24, 1550054 (2015) | 10.1142/S0218271815420225 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A rotating thin shell in a (2+1)-dimensional asymptotically AdS spacetime is
studied. The spacetime exterior to the shell is the rotating BTZ spacetime and
the interior is the empty spacetime with a cosmological constant. Through the
Einstein equation in (2+1)-dimensions and the corresponding junction conditions
we c... | [
{
"created": "Wed, 17 Jun 2015 20:00:28 GMT",
"version": "v1"
}
] | 2016-03-22 | [
[
"Lemos",
"José P. S.",
""
],
[
"Lopes",
"Francisco J.",
""
],
[
"Minamitsuji",
"Masato",
""
]
] | A rotating thin shell in a (2+1)-dimensional asymptotically AdS spacetime is studied. The spacetime exterior to the shell is the rotating BTZ spacetime and the interior is the empty spacetime with a cosmological constant. Through the Einstein equation in (2+1)-dimensions and the corresponding junction conditions we cal... |
2305.10382 | Pedro Fernandes | Pedro G. S. Fernandes | Rotating black holes in semiclassical gravity | 5 pages, 2 figures. v2: references added, expanded discussion | Phys.Rev.D 108 (2023) 6, L061502 | 10.1103/PhysRevD.108.L061502 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present analytic stationary and axially-symmetric black hole solutions to
the semiclassical Einstein equations that are sourced by the trace anomaly. We
also find that the same spacetime geometry satisfies the field equations of a
subset of Horndeski theories featuring a conformally coupled scalar field. We
explor... | [
{
"created": "Wed, 17 May 2023 17:15:55 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jul 2023 23:31:42 GMT",
"version": "v2"
}
] | 2024-02-14 | [
[
"Fernandes",
"Pedro G. S.",
""
]
] | We present analytic stationary and axially-symmetric black hole solutions to the semiclassical Einstein equations that are sourced by the trace anomaly. We also find that the same spacetime geometry satisfies the field equations of a subset of Horndeski theories featuring a conformally coupled scalar field. We explore ... |
1003.1429 | Chen Songbai | Yue Liu, Songbai Chen, Jiliang Jing | Strong gravitational lensing in a squashed Kaluza-Klein black hole
spacetime | 13pages, 5 figures, Final version appeared in PRD | Phys.Rev.D81:124017,2010 | 10.1103/PhysRevD.81.124017 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the strong gravitational lensing in a Kaluza-Klein black hole
with squashed horizons. We find the size of the extra dimension imprints in the
radius of the photon sphere, the deflection angle, the angular position and
magnification of the relativistic images. Supposing that the gravitational
field of t... | [
{
"created": "Sun, 7 Mar 2010 03:07:43 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Jun 2010 03:36:42 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Liu",
"Yue",
""
],
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | We investigate the strong gravitational lensing in a Kaluza-Klein black hole with squashed horizons. We find the size of the extra dimension imprints in the radius of the photon sphere, the deflection angle, the angular position and magnification of the relativistic images. Supposing that the gravitational field of the... |
1204.1269 | Pavel Ivanov | Pavel Ivanov | On relativistic motion of a pair of particles having opposite signs of
masses | to be published in Physics-Uspekhi, a few misprints are corrected,
discussion is extended and one figure is added | null | 10.3367/UFNe.0182.201212d.1319 | null | gr-qc physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | (abbreviated) In this note we consider, in a weak-field limit, a relativistic
linear motion of two particles with opposite signs of masses having a small
difference between their absolute values $m_{1,2}=\pm (\mu\pm \Delta \mu) $,
$\mu > 0$, $|\Delta \mu | \ll \mu$ and a small difference between their
velocities. Ass... | [
{
"created": "Thu, 5 Apr 2012 16:34:28 GMT",
"version": "v1"
},
{
"created": "Sun, 3 Jun 2012 12:30:54 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Ivanov",
"Pavel",
""
]
] | (abbreviated) In this note we consider, in a weak-field limit, a relativistic linear motion of two particles with opposite signs of masses having a small difference between their absolute values $m_{1,2}=\pm (\mu\pm \Delta \mu) $, $\mu > 0$, $|\Delta \mu | \ll \mu$ and a small difference between their velocities. Assum... |
gr-qc/0607007 | Stanislav Babak | Stanislav Babak, Hua Fang, Jonathan R. Gair, Kostas Glampedakis, Scott
A. Hughes | "Kludge" gravitational waveforms for a test-body orbiting a Kerr black
hole | 29 pages, 11 figures, requires subeqnarray; v2 contains minor changes
for consistency with published version | Phys.Rev.D75:024005,2007; Erratum-ibid.D77:04990,2008 | 10.1103/PhysRevD.75.024005 10.1103/PhysRevD.77.04990 | null | gr-qc astro-ph | null | One of the most exciting potential sources of gravitational waves for
low-frequency, space-based gravitational wave (GW) detectors such as the
proposed Laser Interferometer Space Antenna (LISA) is the inspiral of compact
objects into massive black holes in the centers of galaxies. The detection of
waves from such "ex... | [
{
"created": "Mon, 3 Jul 2006 11:58:31 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Jan 2008 15:02:22 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Babak",
"Stanislav",
""
],
[
"Fang",
"Hua",
""
],
[
"Gair",
"Jonathan R.",
""
],
[
"Glampedakis",
"Kostas",
""
],
[
"Hughes",
"Scott A.",
""
]
] | One of the most exciting potential sources of gravitational waves for low-frequency, space-based gravitational wave (GW) detectors such as the proposed Laser Interferometer Space Antenna (LISA) is the inspiral of compact objects into massive black holes in the centers of galaxies. The detection of waves from such "extr... |
gr-qc/0003061 | Banibrata Mukhopadhyay | Banibrata Mukhopadhyay | Behaviour of spin-1/2 particle around a charged black hole | 8 Latex pages and 4 Figures; RevTex.style; Accepted for Publication
in Classical and Quantum Gravity | Class.Quant.Grav. 17 (2000) 2017-2026 | 10.1088/0264-9381/17/9/311 | null | gr-qc astro-ph hep-th | null | Dirac equation is separable in curved space-time and its solution was found
for both spherically and axially symmetric geometry. But most of the works were
done without considering the charge of the black hole. Here we consider the
spherically symmetric charged black hole background namely Reissner-Nordstrom
black ho... | [
{
"created": "Wed, 15 Mar 2000 13:52:20 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Mukhopadhyay",
"Banibrata",
""
]
] | Dirac equation is separable in curved space-time and its solution was found for both spherically and axially symmetric geometry. But most of the works were done without considering the charge of the black hole. Here we consider the spherically symmetric charged black hole background namely Reissner-Nordstrom black hole... |
gr-qc/9408017 | Datta Dhurjati Prasad | Dhurjati Prasad Datta | Relevance of Induced Gauge Interactions in Decoherence | 10 pages, LATEX, IC/94/168 | Phys.Rev.D52:3375-3381,1995 | 10.1103/PhysRevD.52.3375 | null | gr-qc | null | Decoherence in quantum cosmology is shown to occur naturally in the presence
of induced geometric gauge interactions associated with particle production.A
new 'gauge '-variant form of the semiclassical Einstein equations is also
presented which makes the non-gravitating character of the vacuum polarisation
energy exp... | [
{
"created": "Mon, 15 Aug 1994 12:19:06 GMT",
"version": "v1"
}
] | 2011-08-04 | [
[
"Datta",
"Dhurjati Prasad",
""
]
] | Decoherence in quantum cosmology is shown to occur naturally in the presence of induced geometric gauge interactions associated with particle production.A new 'gauge '-variant form of the semiclassical Einstein equations is also presented which makes the non-gravitating character of the vacuum polarisation energy expli... |
gr-qc/9710053 | Alan Rendall | James Isenberg, Alan D. Rendall | Cosmological spacetimes not covered by a constant mean curvature slicing | 11 pages | Class.Quant.Grav. 15 (1998) 3679-3688 | 10.1088/0264-9381/15/11/025 | null | gr-qc | null | We show that there exist maximal globally hyperbolic solutions of the
Einstein-dust equations which admit a constant mean curvature Cauchy surface,
but are not covered by a constant mean curvature foliation.
| [
{
"created": "Thu, 9 Oct 1997 11:30:41 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Isenberg",
"James",
""
],
[
"Rendall",
"Alan D.",
""
]
] | We show that there exist maximal globally hyperbolic solutions of the Einstein-dust equations which admit a constant mean curvature Cauchy surface, but are not covered by a constant mean curvature foliation. |
2005.02826 | Phongpichit Channuie | Daris Samart (Khon Kaen U.), Phongpichit Channuie (Walailak U.) | Generalized gravitational phase transition in novel 4D
Einstein-Gauss-Bonnet gravity | v2: 1+15 pages, 4 figures, typos corrected, references updated | Ann. Phys. (Berlin) 2022, 2100308 | 10.1002/andp.202100308 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we present the possible existence of thermal phase transition
between AdS to dS asymptotic geometries in vacuum in the context of novel 4D
Einstein-Gauss-Bonnet (EGB) gravity. The phase transition proceeds through the
thermalon (the Euclidean sector of the bubble thin-shell) formation having a
black hol... | [
{
"created": "Tue, 5 May 2020 17:03:11 GMT",
"version": "v1"
},
{
"created": "Mon, 11 May 2020 00:43:30 GMT",
"version": "v2"
}
] | 2022-01-31 | [
[
"Samart",
"Daris",
"",
"Khon Kaen U."
],
[
"Channuie",
"Phongpichit",
"",
"Walailak U."
]
] | In this work, we present the possible existence of thermal phase transition between AdS to dS asymptotic geometries in vacuum in the context of novel 4D Einstein-Gauss-Bonnet (EGB) gravity. The phase transition proceeds through the thermalon (the Euclidean sector of the bubble thin-shell) formation having a black hole ... |
2205.08516 | Luk\'a\v{s} Polcar | Luk\'a\v{s} Polcar, Georgios Lukes-Gerakopoulos, Vojt\v{e}ch Witzany | Extreme mass ratio inspirals into black holes surrounded by matter | null | null | 10.1103/PhysRevD.106.044069 | null | gr-qc astro-ph.GA nlin.SI | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inspirals of stellar-mass compact objects into massive black holes, known as
extreme mass ratio inspirals (EMRIs), are one of the key targets for upcoming
space-based gravitational-wave detectors. In this paper we take the first steps
needed to systematically incorporate the effect of external gravitating matter
on E... | [
{
"created": "Tue, 17 May 2022 17:39:27 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Jul 2023 16:28:30 GMT",
"version": "v2"
}
] | 2023-08-01 | [
[
"Polcar",
"Lukáš",
""
],
[
"Lukes-Gerakopoulos",
"Georgios",
""
],
[
"Witzany",
"Vojtěch",
""
]
] | Inspirals of stellar-mass compact objects into massive black holes, known as extreme mass ratio inspirals (EMRIs), are one of the key targets for upcoming space-based gravitational-wave detectors. In this paper we take the first steps needed to systematically incorporate the effect of external gravitating matter on EMR... |
2303.17866 | Yasha Neiman | Yasha Neiman | Self-dual gravity in de Sitter space: lightcone ansatz and static-patch
scattering | 35 pages; v2: PRD version - expanded discussion and derivations,
minor mistakes corrected, appendix added; v3: corrected the kinematics of
reading off the final right-handed data | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using Krasnov's formulation of General Relativity (GR), we develop a
lightcone ansatz for self-dual gravity (along with linearized anti-self-dual
perturbations) in the Poincare patch of de Sitter space. This amounts to a
generalization of Plebanski's "second heavenly equation" to non-zero
cosmological constant. The o... | [
{
"created": "Fri, 31 Mar 2023 08:00:52 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Jan 2024 22:22:02 GMT",
"version": "v2"
},
{
"created": "Sun, 10 Mar 2024 12:05:40 GMT",
"version": "v3"
}
] | 2024-03-12 | [
[
"Neiman",
"Yasha",
""
]
] | Using Krasnov's formulation of General Relativity (GR), we develop a lightcone ansatz for self-dual gravity (along with linearized anti-self-dual perturbations) in the Poincare patch of de Sitter space. This amounts to a generalization of Plebanski's "second heavenly equation" to non-zero cosmological constant. The onl... |
2404.10808 | Pham Van Ky | Pham Van Ky, Nguyen Thi Hong Van and Nguyen Anh Ky | Gravitational radiation of a spherically symmetric source in
$f(R)$-gravitation | LaTeX 10 pages, 5 figures | Eur. Phys. J. C (2024) 84: 298 | 10.1140/epjc/s10052-024-12606-y | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | It is shown that Birkhoff's theorem for the general theory of relativity is
overcome in the $f(R)$-theory of gravitation. That means, the $f(R)$-theory of
gravitation, unlike Einstein's general theory of relativity, does not forbid
gravitational radiation from a spherically symmetric source (whether stationary
or non... | [
{
"created": "Tue, 16 Apr 2024 15:08:14 GMT",
"version": "v1"
}
] | 2024-04-18 | [
[
"Van Ky",
"Pham",
""
],
[
"Van",
"Nguyen Thi Hong",
""
],
[
"Ky",
"Nguyen Anh",
""
]
] | It is shown that Birkhoff's theorem for the general theory of relativity is overcome in the $f(R)$-theory of gravitation. That means, the $f(R)$-theory of gravitation, unlike Einstein's general theory of relativity, does not forbid gravitational radiation from a spherically symmetric source (whether stationary or non-s... |
2004.07047 | B. V. Ivanov | B.V. Ivanov | Generating solutions for charged stellar models in general relativity | 16 pages, no figures. arXiv admin note: substantial text overlap with
arXiv:2004.00907 | null | 10.1140/epjc/s10052-021-09025-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the expressions for the tangential pressure, the anisotropy
factor and the radial pressure in the Einstein - Maxwell equations may serve as
generating functions for charged stellar models. The latter can incorporate an
equation of state when the expression for the energy density is also used.
Other g... | [
{
"created": "Sat, 4 Apr 2020 12:20:36 GMT",
"version": "v1"
}
] | 2021-03-31 | [
[
"Ivanov",
"B. V.",
""
]
] | It is shown that the expressions for the tangential pressure, the anisotropy factor and the radial pressure in the Einstein - Maxwell equations may serve as generating functions for charged stellar models. The latter can incorporate an equation of state when the expression for the energy density is also used. Other gen... |
1202.6045 | Yuri Obukhov | Yuri N. Obukhov and Friedrich W. Hehl | Extended Einstein-Cartan theory a la Diakonov: the field equations | 13 pages, no figures | null | 10.1016/j.physletb.2012.06.005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Diakonov formulated a model of a primordial Dirac spinor field interacting
gravitationally within the geometric framework of the Poincar\'e gauge theory
(PGT). Thus, the gravitational field variables are the orthonormal coframe
(tetrad) and the Lorentz connection. A simple gravitational gauge Lagrangian is
the Einste... | [
{
"created": "Mon, 27 Feb 2012 20:32:50 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Obukhov",
"Yuri N.",
""
],
[
"Hehl",
"Friedrich W.",
""
]
] | Diakonov formulated a model of a primordial Dirac spinor field interacting gravitationally within the geometric framework of the Poincar\'e gauge theory (PGT). Thus, the gravitational field variables are the orthonormal coframe (tetrad) and the Lorentz connection. A simple gravitational gauge Lagrangian is the Einstein... |
2403.14245 | Tomasz Smo{\l}ka | Adam Grzela, Jacek Jezierski, Tomasz Smo{\l}ka | Hopfion-like solutions in de Sitter spacetime | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We construct electromagnetic field with non-trivial topological properties on
de Sitter background. The field is closely related with Hopf fibration. We
analyze energy, angular momentum and topological charges for this solution. The
paper is a generalization of CQG \textbf{35} (2018), no. 24, 245010 to de
Sitter spac... | [
{
"created": "Thu, 21 Mar 2024 09:04:16 GMT",
"version": "v1"
}
] | 2024-03-22 | [
[
"Grzela",
"Adam",
""
],
[
"Jezierski",
"Jacek",
""
],
[
"Smołka",
"Tomasz",
""
]
] | We construct electromagnetic field with non-trivial topological properties on de Sitter background. The field is closely related with Hopf fibration. We analyze energy, angular momentum and topological charges for this solution. The paper is a generalization of CQG \textbf{35} (2018), no. 24, 245010 to de Sitter spacet... |
gr-qc/0609109 | Amber Stuver | Amber L. Stuver and Lee Samuel Finn | GravEn: Software for the simulation of gravitational wave detector
network response | 10 Pages, 3 Figures, Presented at the 10th Gravitational Wave Data
Analysis Workshop (GWDAW-10), 14-17 December 2005 at the University of Texas,
Brownsville | Class.Quant.Grav. 23 (2006) S799-S807 | 10.1088/0264-9381/23/19/S18 | LIGO-P060038-00-Z | gr-qc | null | Physically motivated gravitational wave signals are needed in order to study
the behaviour and efficacy of different data analysis methods seeking their
detection. GravEn, short for Gravitational-wave Engine, is a MATLAB software
package that simulates the sampled response of a gravitational wave detector to
incident... | [
{
"created": "Sun, 24 Sep 2006 03:06:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Stuver",
"Amber L.",
""
],
[
"Finn",
"Lee Samuel",
""
]
] | Physically motivated gravitational wave signals are needed in order to study the behaviour and efficacy of different data analysis methods seeking their detection. GravEn, short for Gravitational-wave Engine, is a MATLAB software package that simulates the sampled response of a gravitational wave detector to incident g... |
1309.6304 | Francesco Cianfrani dr | Emanuele Alesci, Francesco Cianfrani and Carlo Rovelli | Quantum-Reduced Loop-Gravity: Relation with the Full Theory | 5 pages | Phys. Rev. D 88, 104001 (2013) | 10.1103/PhysRevD.88.104001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quantum-reduced loop-gravity technique has been introduced for dealing
with cosmological models. We show that it can be applied rather generically:
anytime the spatial metric can be gauge-fixed to a diagonal form. The technique
selects states based on reduced graphs with Livine-Speziale coherent
intertwiners and ... | [
{
"created": "Tue, 24 Sep 2013 19:55:48 GMT",
"version": "v1"
}
] | 2013-11-13 | [
[
"Alesci",
"Emanuele",
""
],
[
"Cianfrani",
"Francesco",
""
],
[
"Rovelli",
"Carlo",
""
]
] | The quantum-reduced loop-gravity technique has been introduced for dealing with cosmological models. We show that it can be applied rather generically: anytime the spatial metric can be gauge-fixed to a diagonal form. The technique selects states based on reduced graphs with Livine-Speziale coherent intertwiners and co... |
1609.03584 | Georgios Doulis | Georgios Doulis and J\"org Frauendiener | Global simulations of Minkowski space-time including space-like infinity | 25 pages, 8 figures | Phys. Rev. D 95, 024035 (2017) | 10.1103/PhysRevD.95.024035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we study linearised gravitational fields on the entire
Minkowski space-time including space-like infinity. The generalised conformal
field equations linearised about a Minkowski background are utilised for this
purpose. In principle, this conformal representation of Einstein's equations
can be used to c... | [
{
"created": "Mon, 12 Sep 2016 20:04:20 GMT",
"version": "v1"
}
] | 2017-02-08 | [
[
"Doulis",
"Georgios",
""
],
[
"Frauendiener",
"Jörg",
""
]
] | In this work, we study linearised gravitational fields on the entire Minkowski space-time including space-like infinity. The generalised conformal field equations linearised about a Minkowski background are utilised for this purpose. In principle, this conformal representation of Einstein's equations can be used to car... |
gr-qc/0311058 | Luca Lusanna | D. Alba (Univ. Firenze), L. Lusanna (INFN Firenze) | Simultaneity, radar 4-coordinates and the 3+1 point of view about
accelerated observers in special relativity | 139 pages, RevTeX, final revised paper with a clarification of the
interpretation of the time transfer in the ACES mission and new references | null | null | null | gr-qc astro-ph hep-th | null | After a review of the 1+3 point of view on non-inertial observers and of the
problems of rotating reference frames, we underline that was is lacking in
their treatment is a good global notion of simultaneity due to the restricted
validity of the existing 4-coordinates associated to an accelerated observer
(like the F... | [
{
"created": "Tue, 18 Nov 2003 15:51:04 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Feb 2004 15:40:53 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Mar 2004 09:20:37 GMT",
"version": "v3"
},
{
"created": "Thu, 29 Apr 2004 09:32:51 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Alba",
"D.",
"",
"Univ. Firenze"
],
[
"Lusanna",
"L.",
"",
"INFN Firenze"
]
] | After a review of the 1+3 point of view on non-inertial observers and of the problems of rotating reference frames, we underline that was is lacking in their treatment is a good global notion of simultaneity due to the restricted validity of the existing 4-coordinates associated to an accelerated observer (like the Fer... |
2001.07865 | Jieci Wang | Jieci Wang, Li Zhang, Songbai Chen, and Jiliang Jing | Estimating the Unruh effect via entangled many-body probes | 13 pages, 3 figures, to appear in Phys. Lett. B | Phys. Lett. B 802,135239 (2020) | 10.1016/j.physletb.2020.135239 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the estimation of parameters in a quantum metrology scheme based on
entangled many-body Unruh-DeWitt detectors. It is found that the precision for
the estimation of Unruh effect can be enhanced via initial state preparations
and parameter selections. It is shown that the precision in the estimation of
the Un... | [
{
"created": "Wed, 22 Jan 2020 03:30:11 GMT",
"version": "v1"
}
] | 2020-02-04 | [
[
"Wang",
"Jieci",
""
],
[
"Zhang",
"Li",
""
],
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | We study the estimation of parameters in a quantum metrology scheme based on entangled many-body Unruh-DeWitt detectors. It is found that the precision for the estimation of Unruh effect can be enhanced via initial state preparations and parameter selections. It is shown that the precision in the estimation of the Unru... |
1212.0341 | Alex Bernardini Dr. | Alex E. Bernardini and O. Bertolami | The Hamiltonian formalism for scalar fields coupled to gravity in a
cosmological background | 27 pages, 4 figures, extended version includes the results for
Hamiltonian formalism applied to the study of the generalized Chaplygin gas
(to match the version that will appear at Annals of Physics) | Annals of Physics 338, 1-20 (2013) | 10.1016/j.aop.2013.07.003 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A novel routine to investigate the scalar fields in a cosmological context is
discussed in the framework of the Hamiltonian formalism. Starting from the
Einstein-Hilbert action coupled to a Lagrangian density that contains two
components - one corresponding to a scalar field Lagrangian,
${\mathcal{L}}_{\phi}$, and an... | [
{
"created": "Mon, 3 Dec 2012 10:17:35 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Jul 2013 10:45:54 GMT",
"version": "v2"
}
] | 2013-09-16 | [
[
"Bernardini",
"Alex E.",
""
],
[
"Bertolami",
"O.",
""
]
] | A novel routine to investigate the scalar fields in a cosmological context is discussed in the framework of the Hamiltonian formalism. Starting from the Einstein-Hilbert action coupled to a Lagrangian density that contains two components - one corresponding to a scalar field Lagrangian, ${\mathcal{L}}_{\phi}$, and anot... |
gr-qc/9806044 | Matteo Buzzacchi | G. Preparata, R. Rovelli and S.-S. Xue | Gas of wormholes: a possible ground state of Quantum Gravity | 56 pages, revised version to appear in General Relativity and
Gravitation (2000) | Gen.Rel.Grav. 32 (2000) 1859-1931 | 10.1023/A:1001992900070 | null | gr-qc hep-lat hep-ph hep-th | null | In order to gain insight into the possible Ground State of Quantized
Einstein's Gravity, we have derived a variational calculation of the energy of
the quantum gravitational field in an open space, as measured by an asymptotic
observer living in an asymptotically flat space-time. We find that for Quantum
Gravity (QG)... | [
{
"created": "Tue, 9 Jun 1998 12:29:04 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Mar 2000 10:38:27 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Preparata",
"G.",
""
],
[
"Rovelli",
"R.",
""
],
[
"Xue",
"S. -S.",
""
]
] | In order to gain insight into the possible Ground State of Quantized Einstein's Gravity, we have derived a variational calculation of the energy of the quantum gravitational field in an open space, as measured by an asymptotic observer living in an asymptotically flat space-time. We find that for Quantum Gravity (QG) i... |
gr-qc/9406011 | Yongsung Yoon | Jewan Kim, C. J. Park and Yongsung Yoon | The Constraint of a General Effective Potential in Vector Torsion
Coupled Conformally Induced Gravity | 3pages Revtex 3.0, no figure | null | 10.1103/PhysRevD.51.4595 | null | gr-qc hep-th | null | It is found that the deviation of an effective potential from the quartic
form is related to the metric and vector torsion dependencies of the effective
potential in the vector torsion coupled conformally induced gravity.
| [
{
"created": "Tue, 7 Jun 1994 02:29:55 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Nov 1994 23:30:14 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Kim",
"Jewan",
""
],
[
"Park",
"C. J.",
""
],
[
"Yoon",
"Yongsung",
""
]
] | It is found that the deviation of an effective potential from the quartic form is related to the metric and vector torsion dependencies of the effective potential in the vector torsion coupled conformally induced gravity. |
2402.07977 | Zipeng Wang | Zipeng Wang, Thomas Helfer, Dina Traykova, Katy Clough, Emanuele Berti | Gravitational Magnus effect from scalar dark matter | 10 pages, 6 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In fluid dynamics, the Magnus effect is the force perpendicular to the motion
of a spinning object as it moves through a medium. In general relativity, an
analogous effect exists for a spinning compact object moving through matter,
purely as a result of gravitational interactions. In this work we consider a
Kerr blac... | [
{
"created": "Mon, 12 Feb 2024 19:00:00 GMT",
"version": "v1"
}
] | 2024-02-14 | [
[
"Wang",
"Zipeng",
""
],
[
"Helfer",
"Thomas",
""
],
[
"Traykova",
"Dina",
""
],
[
"Clough",
"Katy",
""
],
[
"Berti",
"Emanuele",
""
]
] | In fluid dynamics, the Magnus effect is the force perpendicular to the motion of a spinning object as it moves through a medium. In general relativity, an analogous effect exists for a spinning compact object moving through matter, purely as a result of gravitational interactions. In this work we consider a Kerr black ... |
2101.08642 | Peter Hess O | Peter Otto Hess and Enrique Lopez-Moreno | Axial and polar modes for the ring down of a Schwarzschild black hole
with an r dependent mass-function | 25 pages, 6 figures | null | 10.1002/asna.20210027 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | The axial and polar modes for the ring down of a Schwarzschild black hole are
calculated, by first deriving the Regge-Wheeler and Zerilli equations,
respectively, and finally applying the Asymptotic Iteration Method (AIM). We
were able to reach up to 500 iterations, obtaining for the first time
convergence for a wide... | [
{
"created": "Thu, 21 Jan 2021 14:44:17 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Jan 2021 15:46:24 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Jun 2021 21:08:41 GMT",
"version": "v3"
}
] | 2021-12-08 | [
[
"Hess",
"Peter Otto",
""
],
[
"Lopez-Moreno",
"Enrique",
""
]
] | The axial and polar modes for the ring down of a Schwarzschild black hole are calculated, by first deriving the Regge-Wheeler and Zerilli equations, respectively, and finally applying the Asymptotic Iteration Method (AIM). We were able to reach up to 500 iterations, obtaining for the first time convergence for a wide r... |
1004.1608 | Alexis Larranaga PhD | Alexis Larranaga, Juan Manuel Tejeiro | Three Dimensional Charged Black Hole Inspired by Noncommutative Geometry | 7 pages | The Abraham Zelmanov Journal 4, 28-35 (2011) | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find a new charged black hole in three-dimensional anti-de Sitter space
using an anisotropic perfect fluid inspired by the noncommutative black hole as
the source of matter and a gaussian distribution of electric charge. We deduce
the thermodynamical quantities of this black hole and compare them with those
of a c... | [
{
"created": "Fri, 9 Apr 2010 17:06:27 GMT",
"version": "v1"
}
] | 2011-09-02 | [
[
"Larranaga",
"Alexis",
""
],
[
"Tejeiro",
"Juan Manuel",
""
]
] | We find a new charged black hole in three-dimensional anti-de Sitter space using an anisotropic perfect fluid inspired by the noncommutative black hole as the source of matter and a gaussian distribution of electric charge. We deduce the thermodynamical quantities of this black hole and compare them with those of a cha... |
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