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1710.10155 | Giuseppe Papallo | Giuseppe Papallo | On the hyperbolicity of the most general Horndeski theory | v2: corrected typos, added funding reference; version accepted for
publication on Phys. Rev. D; added journal reference. 11 pages + appendices | Phys. Rev. D 96, 124036 (2017) | 10.1103/PhysRevD.96.124036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the hyperbolicity of the equations of motion for the
most general Horndeski theory of gravity in a generic "weak field" background.
We first show that a special case of this theory, namely
Einstein-dilaton-Gauss-Bonnet gravity, fails to be strongly hyperbolic in any
generalised harmonic gauge. ... | [
{
"created": "Fri, 27 Oct 2017 14:24:42 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Dec 2017 10:28:40 GMT",
"version": "v2"
}
] | 2017-12-29 | [
[
"Papallo",
"Giuseppe",
""
]
] | In this paper we study the hyperbolicity of the equations of motion for the most general Horndeski theory of gravity in a generic "weak field" background. We first show that a special case of this theory, namely Einstein-dilaton-Gauss-Bonnet gravity, fails to be strongly hyperbolic in any generalised harmonic gauge. We... |
gr-qc/9912070 | Dr Mayeul Arminjon | Mayeul Arminjon | Weak-field approximation of a scalar theory of gravitation and some
remarks on the propagation effects of gravity | 15 pages, HTML. In the previous version, the author believed to have
found a post-Minskowskian approximation which was consistent with both the
usual method of asymptotic expansions and the Newtonian limit. It is now
shown that only the post-Newtonian approximation with instantaneous
propagation meets these two... | null | null | null | gr-qc | null | A simple example is given of the implementation of the usual method of
asymptotic expansions for weak gravitational fields. A scalar, preferred-frame
theory of gravitation is considered, but the method is general. Two kinds of
asymptotic expansion are a priori possible: "post-Newtonian" (PN) or
"post-Minkowskian", th... | [
{
"created": "Thu, 16 Dec 1999 17:35:37 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Dec 1999 09:10:08 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Jan 2000 15:16:32 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Arminjon",
"Mayeul",
""
]
] | A simple example is given of the implementation of the usual method of asymptotic expansions for weak gravitational fields. A scalar, preferred-frame theory of gravitation is considered, but the method is general. Two kinds of asymptotic expansion are a priori possible: "post-Newtonian" (PN) or "post-Minkowskian", the ... |
gr-qc/9702030 | Lee Smolin | Lee Smolin | The future of spin networks | LaTeX 34 pages, no figures | null | null | CGPG-97/2-2 | gr-qc hep-th | null | The roles that spin networks play in gauge theories, quantum gravity and
topological quantum field theory are briefly described, with an emphasis on the
question of the relationships among them. It is argued that spin networks and
their generalizations provide a language which may lead to a unification of the
differe... | [
{
"created": "Mon, 17 Feb 1997 02:03:44 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Smolin",
"Lee",
""
]
] | The roles that spin networks play in gauge theories, quantum gravity and topological quantum field theory are briefly described, with an emphasis on the question of the relationships among them. It is argued that spin networks and their generalizations provide a language which may lead to a unification of the different... |
2407.17307 | David Brizuela | David Brizuela, Sara F. Uria | Asymptotics of Bianchi IX under the presence of matter: approximate
Kasner map | For a better readability, the preprint arXiv:2406.20070v1 has been
divided into two independent and self-consistent papers. The present one
contains all the results corresponding to the Bianchi IX model, while
arXiv:2406.20070v2 contains all the analysis of the Bianchi I model | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The goal of this paper is to analyze the effects of the matter fields in the
evolution of the Bianchi IX cosmology close to the singularity. Although the
dynamics of this model is very involved, asymptotically, as the singularity is
approached, it can be well approximated as a succession of Bianchi I periods
connecte... | [
{
"created": "Tue, 23 Jul 2024 16:18:36 GMT",
"version": "v1"
}
] | 2024-07-25 | [
[
"Brizuela",
"David",
""
],
[
"Uria",
"Sara F.",
""
]
] | The goal of this paper is to analyze the effects of the matter fields in the evolution of the Bianchi IX cosmology close to the singularity. Although the dynamics of this model is very involved, asymptotically, as the singularity is approached, it can be well approximated as a succession of Bianchi I periods connected ... |
gr-qc/0210022 | Thomas Jurke | Thomas Jurke | On future asymptotics of polarized Gowdy T^3-models | null | Class.Quant.Grav. 20 (2003) 173-192 | 10.1088/0264-9381/20/1/313 | null | gr-qc | null | Gowdy's model of cosmological spacetimes is a much investigated subject in
classical and quantum gravity. Depending on spatial topology recollapsing as
well as expanding models are known. Several analytic tools were used in order
to clarify singular behaviour in this class of spacetimes. Here we investigate
the struc... | [
{
"created": "Mon, 7 Oct 2002 16:52:08 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Jurke",
"Thomas",
""
]
] | Gowdy's model of cosmological spacetimes is a much investigated subject in classical and quantum gravity. Depending on spatial topology recollapsing as well as expanding models are known. Several analytic tools were used in order to clarify singular behaviour in this class of spacetimes. Here we investigate the structu... |
gr-qc/9704032 | Ho JeongWon | Jeongwon Ho, Won Tae Kim, Young-Jai Park, and Hyeonjoon Shin | Entropy in the Kerr-Newman Black Hole | 16 pages, Latex, no figures, References are included, Subsection A
and B are reduced to subsection A, Abstract is rewritten, Minor corrections
are included | Class.Quant.Grav. 14 (1997) 2617-2625 | 10.1088/0264-9381/14/9/016 | SOGANG-HEP-216/96 | gr-qc hep-th | null | Entropy of the Kerr-Newman black hole is calculated via the brick wall method
with maintaining careful attention to the contribution of superradiant scalar
modes. It turns out that the nonsuperradinat and superradiant modes
simultaneously contribute to the entropy with the same order in terms of the
brick wall cutoff... | [
{
"created": "Sat, 12 Apr 1997 09:57:07 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Jun 1997 13:22:20 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Ho",
"Jeongwon",
""
],
[
"Kim",
"Won Tae",
""
],
[
"Park",
"Young-Jai",
""
],
[
"Shin",
"Hyeonjoon",
""
]
] | Entropy of the Kerr-Newman black hole is calculated via the brick wall method with maintaining careful attention to the contribution of superradiant scalar modes. It turns out that the nonsuperradinat and superradiant modes simultaneously contribute to the entropy with the same order in terms of the brick wall cutoff $... |
1010.2020 | Xin Li | Xin Li and Zhe Chang | Symmetry and special relativity in Finsler spacetime with constant
curvature | 12pages, minor corrections | null | null | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | Within the framework of projective geometry, we investigate kinematics and
symmetry in $(\alpha,\beta)$ spacetime-one special types of Finsler spacetime.
The projectively flat $(\alpha,\beta)$ spacetime with constant flag curvature
is divided into four types. The symmetry in type A-Riemann spacetime with
constant sec... | [
{
"created": "Mon, 11 Oct 2010 07:37:11 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Oct 2010 08:17:54 GMT",
"version": "v2"
}
] | 2010-10-22 | [
[
"Li",
"Xin",
""
],
[
"Chang",
"Zhe",
""
]
] | Within the framework of projective geometry, we investigate kinematics and symmetry in $(\alpha,\beta)$ spacetime-one special types of Finsler spacetime. The projectively flat $(\alpha,\beta)$ spacetime with constant flag curvature is divided into four types. The symmetry in type A-Riemann spacetime with constant secti... |
0711.3174 | Edward Anderson | Edward Anderson | Seminar on Records Theory | References updated and publication details given | Proceedings of the Second Conference on Time and Matter Ed. M O'
Loughlin, S Stanic and D Veberic (Nova Gorica: University 2008) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In quantum gravity, one seeks to combine quantum mechanics and general
relativity. In attempting to do so, one comes across the `problem of time'
impasse: the notion of time is conceptually different in each of these
theories. In this seminar, I consider the timeless records approach toward
resolving this. Records ar... | [
{
"created": "Tue, 20 Nov 2007 16:57:50 GMT",
"version": "v1"
},
{
"created": "Sat, 30 May 2009 13:41:43 GMT",
"version": "v2"
}
] | 2009-05-30 | [
[
"Anderson",
"Edward",
""
]
] | In quantum gravity, one seeks to combine quantum mechanics and general relativity. In attempting to do so, one comes across the `problem of time' impasse: the notion of time is conceptually different in each of these theories. In this seminar, I consider the timeless records approach toward resolving this. Records are ... |
gr-qc/9910002 | Mauricio Bellini | Mauricio Bellini (Depto. de Fisica, Facultad de Ciencias Exactas y
Nat., Universidad Nacional de Mar del Plata) | Perturbations of the metric induced by back - reaction in the warm
inflation scenario | 13 pages, no figures, version with some corrections | null | null | null | gr-qc | null | A second-order expansion for the quantum fluctuations of the matter field was
considered in the framemork of the warm inflation scenario. The friction and
Hubble parameters were expanded by means of a semiclassical approach. The
fluctuations of the Hubble parameter generates fluctuations of the metric.
These metric f... | [
{
"created": "Fri, 1 Oct 1999 13:01:41 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Oct 1999 20:45:42 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Dec 1999 19:48:27 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Bellini",
"Mauricio",
"",
"Depto. de Fisica, Facultad de Ciencias Exactas y\n Nat., Universidad Nacional de Mar del Plata"
]
] | A second-order expansion for the quantum fluctuations of the matter field was considered in the framemork of the warm inflation scenario. The friction and Hubble parameters were expanded by means of a semiclassical approach. The fluctuations of the Hubble parameter generates fluctuations of the metric. These metric flu... |
1805.09422 | Valerio Faraoni | Fay\c{c}al Hammad, Dilek K. \c{C}iftci, and Valerio Faraoni | Conformal cosmological black holes: restoring determinism to Einstein
theory | Explanation and bibliography expanded. Matches version accepted in
EPJ Plus | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A widespread solution-generating technique of general relativity consists of
conformally transforming known `seed' solutions. It is shown that these new
solutions always solve the field equations of a pathological Brans-Dicke
theory. Furthermore, when interpreted as effective Einstein equations,those
field equations ... | [
{
"created": "Wed, 23 May 2018 20:57:35 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Sep 2019 00:13:33 GMT",
"version": "v2"
}
] | 2019-09-10 | [
[
"Hammad",
"Fayçal",
""
],
[
"Çiftci",
"Dilek K.",
""
],
[
"Faraoni",
"Valerio",
""
]
] | A widespread solution-generating technique of general relativity consists of conformally transforming known `seed' solutions. It is shown that these new solutions always solve the field equations of a pathological Brans-Dicke theory. Furthermore, when interpreted as effective Einstein equations,those field equations ex... |
gr-qc/0703109 | Jorge Rocha | Florian Dubath, Jorge V. Rocha | Periodic Gravitational Waves From Small Cosmic String Loops | 1+15 pages, 7 figures | Phys.Rev.D76:024001,2007 | 10.1103/PhysRevD.76.024001 | null | gr-qc astro-ph | null | We consider a population of small, high-velocity cosmic string loops. We
assume the typical length of these loops is determined by the gravitational
radiation scale and use the results of \cite{Polchinski:2007rg} which pointed
out their highly relativistic nature. A study of the gravitational wave
emission from such ... | [
{
"created": "Wed, 21 Mar 2007 18:42:58 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Dubath",
"Florian",
""
],
[
"Rocha",
"Jorge V.",
""
]
] | We consider a population of small, high-velocity cosmic string loops. We assume the typical length of these loops is determined by the gravitational radiation scale and use the results of \cite{Polchinski:2007rg} which pointed out their highly relativistic nature. A study of the gravitational wave emission from such a ... |
1807.04041 | Titus K Mathew | Jerin Mohan N D, Krishna P B, Athira Sasidharan and Titus K Mathew | Dynamical system analysis and thermal evolution of the causal
dissipative model | 26 pages and four figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamical system behaviour and thermal evolution of a homogeneous and
isotropic dissipative universe are analyzed.
The dissipation is driven by the bulk viscosity $\xi = \alpha \rho^s $ and
the evolution of bulk viscous pressure is described using the full causal
Israel-Stewart theory. We find that for $s=1/2$ ... | [
{
"created": "Wed, 11 Jul 2018 09:49:38 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Jul 2018 14:15:09 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Mar 2020 06:13:14 GMT",
"version": "v3"
}
] | 2020-03-11 | [
[
"D",
"Jerin Mohan N",
""
],
[
"B",
"Krishna P",
""
],
[
"Sasidharan",
"Athira",
""
],
[
"Mathew",
"Titus K",
""
]
] | The dynamical system behaviour and thermal evolution of a homogeneous and isotropic dissipative universe are analyzed. The dissipation is driven by the bulk viscosity $\xi = \alpha \rho^s $ and the evolution of bulk viscous pressure is described using the full causal Israel-Stewart theory. We find that for $s=1/2$ the ... |
1005.1657 | Toby Wiseman | Toby Wiseman and Benjamin Withers | Late time solutions for inhomogeneous Lambda-CDM cosmology, their
characterization and observation | 15 pages, 2 figures; v2: minor corrections and improvements,
references added | Phys.Rev.D83:023511,2011 | 10.1103/PhysRevD.83.023511 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Assuming homogeneous isotropic Lambda-CDM cosmology allows Lambda, spatial
curvature and dark matter density to be inferred from large scale structure
observations such as supernovae. The purpose of this paper is to extend this to
allow observations to measure or constrain inhomogeneity and anisotropy. We
obtain the ... | [
{
"created": "Mon, 10 May 2010 20:12:25 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Jun 2010 21:10:25 GMT",
"version": "v2"
}
] | 2011-02-02 | [
[
"Wiseman",
"Toby",
""
],
[
"Withers",
"Benjamin",
""
]
] | Assuming homogeneous isotropic Lambda-CDM cosmology allows Lambda, spatial curvature and dark matter density to be inferred from large scale structure observations such as supernovae. The purpose of this paper is to extend this to allow observations to measure or constrain inhomogeneity and anisotropy. We obtain the ge... |
gr-qc/9606006 | Tetsuro Kitazoe | Yoshiaki Ohkuwa and Tetsuro Kitazoe | Wave Packet in Quantum Cosmology and Definition of Semiclassical Time | 20 pages, latex, no figures | Int.J.Mod.Phys. A12 (1997) 859-872 | 10.1142/S0217751X97000657 | MMC-M-9 | gr-qc | null | We consider a quantum cosmology with a massless background scalar field $\pb$
and adopt a wave packet as the wave function. This wave packet is a
superposition of the WKB form wave functions, each of which has a definite
momentum of the scalar field $\pb$. In this model it is shown that to trace the
formalism of the ... | [
{
"created": "Wed, 5 Jun 1996 07:49:16 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Ohkuwa",
"Yoshiaki",
""
],
[
"Kitazoe",
"Tetsuro",
""
]
] | We consider a quantum cosmology with a massless background scalar field $\pb$ and adopt a wave packet as the wave function. This wave packet is a superposition of the WKB form wave functions, each of which has a definite momentum of the scalar field $\pb$. In this model it is shown that to trace the formalism of the WK... |
2302.06659 | Gustavo Enrique Garc\'ia De Jes\'us | Gustavo Garc\'ia, Eric Gourgoulhon, Philippe Grandcl\'ement and
Marcelo Salgado | High precision numerical sequences of rotating hairy black holes | 28 pages, 36 figures | null | 10.1103/PhysRevD.107.084047 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze numerically the existence of regular stationary rotating hairy
black holes within the framework of general relativity, which are the result of
solving the Einstein-Klein-Gordon system for a complex-valued scalar field
under suitable boundary (regularity and asymptotically flat) conditions. To
that aim we s... | [
{
"created": "Mon, 13 Feb 2023 19:46:10 GMT",
"version": "v1"
}
] | 2023-05-10 | [
[
"García",
"Gustavo",
""
],
[
"Gourgoulhon",
"Eric",
""
],
[
"Grandclément",
"Philippe",
""
],
[
"Salgado",
"Marcelo",
""
]
] | We analyze numerically the existence of regular stationary rotating hairy black holes within the framework of general relativity, which are the result of solving the Einstein-Klein-Gordon system for a complex-valued scalar field under suitable boundary (regularity and asymptotically flat) conditions. To that aim we sol... |
1806.05795 | Saeed Rastgoo | Hugo A. Morales-T\'ecotl, Saeed Rastgoo, Juan C. Ruelas | Effective dynamics of the Schwarzschild black hole interior with inverse
triad corrections | 24 pages, 7 figures; v2: title, abstract and conclusion modified and
some comments added for more clarity, v3: more detailed comments and
computations added, matches the published version | Annals of Physics 426 (2021) 168401 | 10.1016/j.aop.2021.168401 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reconsider the study of the interior of the Schwarzschild black hole now
including inverse triad quantum corrections within loop quantization. We derive
these corrections and show that they are are related to two parameters
$\delta_b, \delta_c$ associated to the minimum length in the radial and angular
directions,... | [
{
"created": "Fri, 15 Jun 2018 03:12:25 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Mar 2019 01:45:14 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Jan 2021 16:12:08 GMT",
"version": "v3"
}
] | 2021-01-26 | [
[
"Morales-Técotl",
"Hugo A.",
""
],
[
"Rastgoo",
"Saeed",
""
],
[
"Ruelas",
"Juan C.",
""
]
] | We reconsider the study of the interior of the Schwarzschild black hole now including inverse triad quantum corrections within loop quantization. We derive these corrections and show that they are are related to two parameters $\delta_b, \delta_c$ associated to the minimum length in the radial and angular directions, t... |
gr-qc/0309046 | Farhad Ghaboussi | F. Ghaboussi | Dimensional Structure of Space-Time | 24 pages | null | null | null | gr-qc | null | The dimensional structure of space-time is investigated according to physical
and mathematical methods. We show that ther are various empirical and
theoretical restrictions on the number of independent dimensions of space-time,
consequently there is no physical and mathematical evidence for a space-time
with four ind... | [
{
"created": "Mon, 8 Sep 2003 15:20:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ghaboussi",
"F.",
""
]
] | The dimensional structure of space-time is investigated according to physical and mathematical methods. We show that ther are various empirical and theoretical restrictions on the number of independent dimensions of space-time, consequently there is no physical and mathematical evidence for a space-time with four indep... |
1403.0913 | Waleed El Hanafy S. | G.G.L. Nashed and W. El Hanafy | A Built-in Inflation in the $f(T)$-Cosmology | LaTeX2e: 19 pages, 9 figures, 1 table. Version 4 Published version | Eur. Phys. J. C (2014) 74:3099 | 10.1140/epjc/s10052-014-3099-5 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work we derive an exact solution of an isotropic and
homogeneous Universe governed by $f(T)$ gravity. We show how the torsion
contribution to the FRW cosmology can provide a \textit{unique} origin for both
early and late acceleration phases of the Universe. The three models ($k=0, \pm
1$) show a \texti... | [
{
"created": "Sun, 2 Mar 2014 11:41:07 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Apr 2014 14:03:46 GMT",
"version": "v2"
},
{
"created": "Thu, 25 Sep 2014 09:20:38 GMT",
"version": "v3"
},
{
"created": "Fri, 24 Oct 2014 06:00:25 GMT",
"version": "v4"
}
] | 2016-10-19 | [
[
"Nashed",
"G. G. L.",
""
],
[
"Hanafy",
"W. El",
""
]
] | In the present work we derive an exact solution of an isotropic and homogeneous Universe governed by $f(T)$ gravity. We show how the torsion contribution to the FRW cosmology can provide a \textit{unique} origin for both early and late acceleration phases of the Universe. The three models ($k=0, \pm 1$) show a \textit{... |
0809.1008 | Simone Calogero | Simone Calogero, J. Mark Heinzle | Dynamics of Bianchi type I solutions of the Einstein equations with
anisotropic matter | 38 pages, 7 figures Statement about diagonal solutions corrected. New
example | Annales Henri Poincare 10:225-274,2009 | 10.1007/s00023-009-0407-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the global dynamics of Bianchi type I solutions of the Einstein
equations with anisotropic matter. The matter model is not specified explicitly
but only through a set of mild and physically motivated assumptions; thereby
our analysis covers matter models as different from each other as, e.g.,
collisionless... | [
{
"created": "Fri, 5 Sep 2008 11:28:19 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Jan 2009 13:59:20 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Calogero",
"Simone",
""
],
[
"Heinzle",
"J. Mark",
""
]
] | We analyze the global dynamics of Bianchi type I solutions of the Einstein equations with anisotropic matter. The matter model is not specified explicitly but only through a set of mild and physically motivated assumptions; thereby our analysis covers matter models as different from each other as, e.g., collisionless m... |
1411.7257 | Emmanuil Saridakis | Remo Garattini (Bergamo U., Ingengneria Dept. & INFN, Milan), Emmanuel
N. Saridakis (Paris, Inst. Astrophys. & Valparaiso U., Catolica) | Gravity's Rainbow: a bridge towards Horava-Lifshitz gravity | 20 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the connection between Gravity's Rainbow and Horava-Lifshitz
gravity, since both theories incorporate a modification in the UltraViolet
regime which improves their quantum behavior at the cost of the Lorentz
invariance loss. In particular, extracting the Wheeler-De Witt equations of the
two theories in... | [
{
"created": "Tue, 25 Nov 2014 16:47:23 GMT",
"version": "v1"
}
] | 2014-11-27 | [
[
"Garattini",
"Remo",
"",
"Bergamo U., Ingengneria Dept. & INFN, Milan"
],
[
"Saridakis",
"Emmanuel N.",
"",
"Paris, Inst. Astrophys. & Valparaiso U., Catolica"
]
] | We investigate the connection between Gravity's Rainbow and Horava-Lifshitz gravity, since both theories incorporate a modification in the UltraViolet regime which improves their quantum behavior at the cost of the Lorentz invariance loss. In particular, extracting the Wheeler-De Witt equations of the two theories in t... |
gr-qc/0702028 | Thomas Murphy Jr. | T. W. Murphy Jr., K. Nordtvedt, S. G. Turyshev | The Gravitomagnetic Influence on Gyroscopes and on the Lunar Orbit | 4 pages; accepted for publication in Physical Review Letters | Phys.Rev.Lett.98:071102,2007 | 10.1103/PhysRevLett.98.071102 | null | gr-qc astro-ph | null | Gravitomagnetism--a motional coupling of matter analogous to the Lorentz
force in electromagnetism--has observable consequences for any scenario
involving differing mass currents. Examples include gyroscopes located near a
rotating massive body, and the interaction of two orbiting bodies. In the
former case, the resu... | [
{
"created": "Mon, 5 Feb 2007 18:39:29 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Murphy",
"T. W.",
"Jr."
],
[
"Nordtvedt",
"K.",
""
],
[
"Turyshev",
"S. G.",
""
]
] | Gravitomagnetism--a motional coupling of matter analogous to the Lorentz force in electromagnetism--has observable consequences for any scenario involving differing mass currents. Examples include gyroscopes located near a rotating massive body, and the interaction of two orbiting bodies. In the former case, the result... |
2003.05387 | Mikhail Ivanov | M. G. Ivanov | Domain wall nonlinear quantization | 10 pages, Expanded bibliography. The work is put in a broader context | null | 10.1134/S0202289321040083 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The nonlinear quantization of the domain wall (relativistic membrane of
codimension 1) is considered. The membrane dust equation is considered as an
analogue of the Hamilton-Jacobi equation, which allows us to construct its
quantum analogue. The resulting equation has the form of a nonlinear
Klein-Fock-Gordon equatio... | [
{
"created": "Wed, 11 Mar 2020 16:14:51 GMT",
"version": "v1"
},
{
"created": "Thu, 14 May 2020 15:56:45 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Jul 2020 10:39:47 GMT",
"version": "v3"
}
] | 2021-12-22 | [
[
"Ivanov",
"M. G.",
""
]
] | The nonlinear quantization of the domain wall (relativistic membrane of codimension 1) is considered. The membrane dust equation is considered as an analogue of the Hamilton-Jacobi equation, which allows us to construct its quantum analogue. The resulting equation has the form of a nonlinear Klein-Fock-Gordon equation.... |
gr-qc/9602018 | Gregg Harry | Gregory M. Harry, Thomas R. Stevenson, Ho Jung Paik | Detectability of gravitational wave events by spherical resonant-mass
antennas | 39 pages, 4 EPS Figures, some additional SNRs for secular
instabilities, some changes to LIGO SNRs, Appendix added on the asymptotic
expansion of energy sensitivity, corrected supernova rates. Results available
at http://www.physics.umd.edu/rgroups/gen_rel_exp/snr.html Submitted to Phys.
Rev. D | Phys.Rev.D54:2409-2420,1996 | 10.1103/PhysRevD.54.2409 | null | gr-qc | null | We have calculated signal-to-noise ratios for eight spherical resonant-mass
antennas interacting with gravitational radiation from inspiralling and
coalescing binary neutron stars and from the dynamical and secular bar-mode
instability of a rapidly rotating star. We find that by using technology that
could be availab... | [
{
"created": "Fri, 9 Feb 1996 23:15:31 GMT",
"version": "v1"
},
{
"created": "Mon, 13 May 1996 20:21:46 GMT",
"version": "v2"
}
] | 2010-01-06 | [
[
"Harry",
"Gregory M.",
""
],
[
"Stevenson",
"Thomas R.",
""
],
[
"Paik",
"Ho Jung",
""
]
] | We have calculated signal-to-noise ratios for eight spherical resonant-mass antennas interacting with gravitational radiation from inspiralling and coalescing binary neutron stars and from the dynamical and secular bar-mode instability of a rapidly rotating star. We find that by using technology that could be available... |
gr-qc/9508011 | R. Balasubramanian | R. Balasubramanian, B.S. Sathyaprakash and S.V. Dhurandhar | Gravitational waves from coalescing binaries: detection strategies and
Monte Carlo estimation of parameters | 28 pages, REVTEX, 12 figures (bundled via uufiles command along with
this paper) submitted to Phys. Rev. D | Phys.Rev.D53:3033-3055,1996; Erratum-ibid.D54:1860,1996 | 10.1103/PhysRevD.53.3033 10.1103/PhysRevD.54.1860 | null | gr-qc | null | The paper deals with issues pertaining the detection of gravitational waves
from coalescing binaries. We introduce the application of differential geometry
to the problem of optimal detection of the `chirp signal'. We have also carried
out extensive Monte Carlo simulations to understand the errors in the
estimation o... | [
{
"created": "Sat, 5 Aug 1995 00:57:01 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Balasubramanian",
"R.",
""
],
[
"Sathyaprakash",
"B. S.",
""
],
[
"Dhurandhar",
"S. V.",
""
]
] | The paper deals with issues pertaining the detection of gravitational waves from coalescing binaries. We introduce the application of differential geometry to the problem of optimal detection of the `chirp signal'. We have also carried out extensive Monte Carlo simulations to understand the errors in the estimation of ... |
1609.01126 | Andronikos Paliathanasis | John D. Barrow and Andronikos Paliathanasis | Observational Constraints on New Exact Inflationary Scalar-field
Solutions | 23 pages; 7 figures; accepted for publication by Physical Review D | null | 10.1103/PhysRevD.94.083518 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An algorithm is used to generate new solutions of the scalar field equations
in homogeneous and isotropic universes. Solutions can be found for pure scalar
fields with various potentials in the absence and presence of spatial curvature
and other perfect fluids. A series of generalisations of the Chaplygin gas and
bul... | [
{
"created": "Mon, 5 Sep 2016 12:21:49 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Oct 2016 23:20:32 GMT",
"version": "v2"
}
] | 2016-11-23 | [
[
"Barrow",
"John D.",
""
],
[
"Paliathanasis",
"Andronikos",
""
]
] | An algorithm is used to generate new solutions of the scalar field equations in homogeneous and isotropic universes. Solutions can be found for pure scalar fields with various potentials in the absence and presence of spatial curvature and other perfect fluids. A series of generalisations of the Chaplygin gas and bulk ... |
gr-qc/0207113 | Kahil | M.I. Wanas, M. Melek and M.E. Kahil | New Path Equations in Absolute Parallelism Geometry | 4 pages Latex file Journal Reference: Astrophysics and space science
228, 273, (1995) | Astrophys.Space Sci. 228 (1995) 273 | 10.1007/BF00984980 | null | gr-qc | null | The Bazanski approach, for deriving the geodesic equations in Riemannian
geometry, is generalized in the absolute parallelism geometry. As a consequence
of this generalization three path equations are obtained. A striking feature in
the derived equations is the appearance of a torsion term with a numerical
coefficien... | [
{
"created": "Sun, 28 Jul 2002 09:22:26 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Wanas",
"M. I.",
""
],
[
"Melek",
"M.",
""
],
[
"Kahil",
"M. E.",
""
]
] | The Bazanski approach, for deriving the geodesic equations in Riemannian geometry, is generalized in the absolute parallelism geometry. As a consequence of this generalization three path equations are obtained. A striking feature in the derived equations is the appearance of a torsion term with a numerical coefficients... |
gr-qc/9704021 | null | Ichiro Oda | Cosmic Censorship in Quantum Gravity | 17 pages, phyzzx | null | null | EDO-EP-11 | gr-qc | null | We study cosmic censorship in the Reissner-Nordstrom charged black hole by
means of quantum gravity holding near the apparent horizons. We consider a
gedanken experiment whether or not a black hole with the electric charge $Q$
less than the mass $M$ ($Q < M$) could increase its charge to go beyond the
extremal limit ... | [
{
"created": "Tue, 8 Apr 1997 07:48:09 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Oda",
"Ichiro",
""
]
] | We study cosmic censorship in the Reissner-Nordstrom charged black hole by means of quantum gravity holding near the apparent horizons. We consider a gedanken experiment whether or not a black hole with the electric charge $Q$ less than the mass $M$ ($Q < M$) could increase its charge to go beyond the extremal limit $Q... |
gr-qc/0609106 | Alberto Vecchio | K. A. Arnaud, S. Babak, J. G. Baker, M. J. Benacquista, N. J. Cornish,
C. Cutler, S. L. Larson, B. S. Sathyaprakash, M. Vallisneri, A. Vecchio and
J-Y. Vinet (The Mock LISA Data Challenge Task Force) | A How-To for the Mock LISA Data Challenges | 10 pages, 1 figure, in Proceedings of the Sixth International LISA
Symposium (AIP, 2006) | AIPConf.Proc.873:625-632,2006 | 10.1063/1.2405109 | null | gr-qc | null | The LISA International Science Team Working Group on Data Analysis
(LIST-WG1B) is sponsoring several rounds of mock data challenges, with the
purpose of fostering development of LISA data-analysis capabilities, and of
demonstrating technical readiness for the maximum science exploitation of the
LISA data. The first r... | [
{
"created": "Mon, 25 Sep 2006 17:37:20 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Arnaud",
"K. A.",
"",
"The Mock LISA Data Challenge Task Force"
],
[
"Babak",
"S.",
"",
"The Mock LISA Data Challenge Task Force"
],
[
"Baker",
"J. G.",
"",
"The Mock LISA Data Challenge Task Force"
],
[
"Benacquista",
"M. J.",
"",
"The ... | The LISA International Science Team Working Group on Data Analysis (LIST-WG1B) is sponsoring several rounds of mock data challenges, with the purpose of fostering development of LISA data-analysis capabilities, and of demonstrating technical readiness for the maximum science exploitation of the LISA data. The first rou... |
1410.3881 | Nikodem Poplawski | Nikodem J. Poplawski | Universe in a black hole with spin and torsion | 10 pages | Astrophys. J. 832, 96 (2016) | 10.3847/0004-637X/832/2/96 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The conservation law for the angular momentum in curved spacetime requires
that the antisymmetric part of the affine connection (the torsion tensor) is a
variable in the principle of least action. The coupling between spin and
torsion generates gravitational repulsion in fermionic matter at extremely high
densities a... | [
{
"created": "Tue, 14 Oct 2014 22:27:54 GMT",
"version": "v1"
}
] | 2016-12-21 | [
[
"Poplawski",
"Nikodem J.",
""
]
] | The conservation law for the angular momentum in curved spacetime requires that the antisymmetric part of the affine connection (the torsion tensor) is a variable in the principle of least action. The coupling between spin and torsion generates gravitational repulsion in fermionic matter at extremely high densities and... |
2106.15862 | Yi-Fan Wang | Chen Lan and Yi-Fan Wang | Semi-classical predictions of cosmological wave-packets from ridge-lines | 44 pages, 14 figures, 3 tables | null | 10.1103/PhysRevD.105.026002 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We introduce a concept of ridge-lines to investigate the semi-classical
prediction from wave-packets with arbitrary width in conventional quantum
mechanics and the Wheeler--DeWitt quantum cosmology. Two primary approaches are
applied to the exact calculation of the ridge-lines, namely the contour and the
stream appro... | [
{
"created": "Wed, 30 Jun 2021 07:43:12 GMT",
"version": "v1"
}
] | 2022-01-20 | [
[
"Lan",
"Chen",
""
],
[
"Wang",
"Yi-Fan",
""
]
] | We introduce a concept of ridge-lines to investigate the semi-classical prediction from wave-packets with arbitrary width in conventional quantum mechanics and the Wheeler--DeWitt quantum cosmology. Two primary approaches are applied to the exact calculation of the ridge-lines, namely the contour and the stream approac... |
1712.08471 | Tommi Tenkanen | Laur J\"arv, Antonio Racioppi, Tommi Tenkanen | The Palatini side of inflationary attractors | 5 pages, 1 figure. v2: Notation clarified, references and discussion
added | Phys. Rev. D 97, 083513 (2018) | 10.1103/PhysRevD.97.083513 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform an analysis of models of chaotic inflation where the inflaton
field $\phi$ is coupled non-minimally to gravity via $\xi \phi^n
g^{\mu\nu}R_{\mu\nu}(\Gamma), n>0$. We focus on the Palatini theory of gravity,
i.e. the case where the assumptions of the General Relativity are relaxed (that
of the connection be... | [
{
"created": "Thu, 21 Dec 2017 12:35:47 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Apr 2018 17:17:27 GMT",
"version": "v2"
}
] | 2018-04-20 | [
[
"Järv",
"Laur",
""
],
[
"Racioppi",
"Antonio",
""
],
[
"Tenkanen",
"Tommi",
""
]
] | We perform an analysis of models of chaotic inflation where the inflaton field $\phi$ is coupled non-minimally to gravity via $\xi \phi^n g^{\mu\nu}R_{\mu\nu}(\Gamma), n>0$. We focus on the Palatini theory of gravity, i.e. the case where the assumptions of the General Relativity are relaxed (that of the connection bein... |
1607.06535 | Hyun Chul Lee | Yong-Jin Han and Hyun-Chul Lee | Embedded Diagrams of Kerr and Non-Kerr black Holes | 4 pages, 6 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Embedded diagrams are drawn for investigating the black hole of Kerr and
non-Kerr metric. Kerr black holes are characterized by masses $M$ and spin
parameters $a$. Non-Kerr black holes also are characterized by the deformation
parameters $\epsilon$, which is related to shape of the black hole, in addition
to their ma... | [
{
"created": "Fri, 22 Jul 2016 01:42:59 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jul 2016 05:30:16 GMT",
"version": "v2"
}
] | 2016-07-26 | [
[
"Han",
"Yong-Jin",
""
],
[
"Lee",
"Hyun-Chul",
""
]
] | Embedded diagrams are drawn for investigating the black hole of Kerr and non-Kerr metric. Kerr black holes are characterized by masses $M$ and spin parameters $a$. Non-Kerr black holes also are characterized by the deformation parameters $\epsilon$, which is related to shape of the black hole, in addition to their mass... |
1908.04735 | Anil Yadav dr | Hassan Amirhashchi and Anil Kumar Yadav | Constraining An Exact Brans-Dicke gravity theory with Recent
Observations | 10 pages, 8 Figures, Unlike the previous version, this one uses
Observational Hubble data, the baryon acoustic oscillation distance ratio
data as well as cosmic microwave background data from Planck to constrain
parameters of the obtained Brans-Dicke model | Physics of the Dark Universe 30 (2020) 100711 | 10.1016/j.dark.2020.100711 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper first we study Brans-Dicke equations with the cosmological
constant to find an exact solution in the spatially flat Robertson-Walker
metric. Then we use Observational Hubble data, the baryon acoustic oscillation
distance ratio data as well as cosmic microwave background data from Planck to
constrain par... | [
{
"created": "Mon, 12 Aug 2019 16:37:54 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Sep 2019 15:05:21 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Oct 2019 20:07:40 GMT",
"version": "v3"
}
] | 2020-08-26 | [
[
"Amirhashchi",
"Hassan",
""
],
[
"Yadav",
"Anil Kumar",
""
]
] | In this paper first we study Brans-Dicke equations with the cosmological constant to find an exact solution in the spatially flat Robertson-Walker metric. Then we use Observational Hubble data, the baryon acoustic oscillation distance ratio data as well as cosmic microwave background data from Planck to constrain param... |
gr-qc/0312101 | Ken D. Olum | Christian Stephan-Otto, Ken D. Olum and Xavier Siemens | Cosmological stretching of perturbations on a cosmic string | 11 pages, 5 postscript figures | JCAP 0405 (2004) 003 | 10.1088/1475-7516/2004/05/003 | null | gr-qc hep-ph hep-th | null | We investigate the effects of cosmological expansion on the spectrum of
small-scale structure on a cosmic string. We simulate the evolution of a string
with two modes that differ in wavelength by one order of magnitude. Once the
short mode is inside the horizon, we find that its physical amplitude remains
unchanged, ... | [
{
"created": "Mon, 22 Dec 2003 18:34:38 GMT",
"version": "v1"
},
{
"created": "Wed, 12 May 2004 19:42:07 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Stephan-Otto",
"Christian",
""
],
[
"Olum",
"Ken D.",
""
],
[
"Siemens",
"Xavier",
""
]
] | We investigate the effects of cosmological expansion on the spectrum of small-scale structure on a cosmic string. We simulate the evolution of a string with two modes that differ in wavelength by one order of magnitude. Once the short mode is inside the horizon, we find that its physical amplitude remains unchanged, in... |
2404.10799 | Manasse R. Mbonye | Manasse R. Mbonye | The Big Bang: Origins and initial conditions from Self-Regulating
Cosmology (SRC) model | 26 pages, 2 diagrams. To appear in Eur. Phys. J. C | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Generating appropriate initial conditions for the Universe is key to
discussing cosmic evolution constructively. In standard cosmology the
traditional approach assumes an early Universe that emerges from an infinite
density, spacetime singularity. It then undergoes inflationary expansion,
followed by a matter-creatin... | [
{
"created": "Mon, 15 Apr 2024 22:59:27 GMT",
"version": "v1"
}
] | 2024-04-18 | [
[
"Mbonye",
"Manasse R.",
""
]
] | Generating appropriate initial conditions for the Universe is key to discussing cosmic evolution constructively. In standard cosmology the traditional approach assumes an early Universe that emerges from an infinite density, spacetime singularity. It then undergoes inflationary expansion, followed by a matter-creating ... |
2210.01729 | Alejandro Jim\'enez-Cano | Jose Beltr\'an Jim\'enez, Alejandro Jim\'enez-Cano and Yuri N. Obukhov | On parity-odd sector in metric-affine theories | 12 pages, no figures, no tables. Added: small changes and some
references. Version to be published in EPJC | null | 10.1140/epjc/s10052-023-11250-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We undertake the construction of quadratic parity-violating terms involving
the curvature in the four-dimensional metric-affine gravity. We demonstrate
that there are only 12 linearly independent scalars, plus an additional one
that can be removed by using the Pontryagin invariant. Several convenient bases
for this s... | [
{
"created": "Tue, 4 Oct 2022 16:38:55 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Feb 2023 09:12:30 GMT",
"version": "v2"
}
] | 2023-02-22 | [
[
"Jiménez",
"Jose Beltrán",
""
],
[
"Jiménez-Cano",
"Alejandro",
""
],
[
"Obukhov",
"Yuri N.",
""
]
] | We undertake the construction of quadratic parity-violating terms involving the curvature in the four-dimensional metric-affine gravity. We demonstrate that there are only 12 linearly independent scalars, plus an additional one that can be removed by using the Pontryagin invariant. Several convenient bases for this sec... |
2207.08575 | Andronikos Paliathanasis | Andronikos Paliathanasis | Anisotropic spacetimes in $f(T,B)$ theory IV: Noether symmetry analysis | 14 pages, no figures | null | null | null | gr-qc astro-ph.CO math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | The Noether symmetry analysis is applied for the analysis of the field
equations in an anisotropic background in $f(T,B)$-theory. We consider the
$f\left( T,B\right) =T+F\left( B\right) $ which describes a small deviation
from TEGR introduced by the boundary scalar $B$. For the Bianchi\ I, Bianchi
III and Kantowski-S... | [
{
"created": "Mon, 18 Jul 2022 12:58:40 GMT",
"version": "v1"
}
] | 2022-07-19 | [
[
"Paliathanasis",
"Andronikos",
""
]
] | The Noether symmetry analysis is applied for the analysis of the field equations in an anisotropic background in $f(T,B)$-theory. We consider the $f\left( T,B\right) =T+F\left( B\right) $ which describes a small deviation from TEGR introduced by the boundary scalar $B$. For the Bianchi\ I, Bianchi III and Kantowski-Sac... |
1607.00910 | Francesco Cianfrani dr | Flavio Bombacigno, Francesco Cianfrani, Giovanni Montani | Big-Bounce cosmology in the presence of Immirzi field | 5 pages, 2 figures | Phys. Rev. D 94, 064021 (2016) | 10.1103/PhysRevD.94.064021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Immirzi parameter is promoted to be a scalar field and the Hamiltonian
analysis of the corresponding dynamical system is performed in the presence of
gravity. We identified some SU(2) connections, generalizing Ashtekar-Barbero
variables, and we rewrite the constraints in terms of them, setting the
classical formu... | [
{
"created": "Mon, 4 Jul 2016 14:40:35 GMT",
"version": "v1"
}
] | 2016-09-14 | [
[
"Bombacigno",
"Flavio",
""
],
[
"Cianfrani",
"Francesco",
""
],
[
"Montani",
"Giovanni",
""
]
] | The Immirzi parameter is promoted to be a scalar field and the Hamiltonian analysis of the corresponding dynamical system is performed in the presence of gravity. We identified some SU(2) connections, generalizing Ashtekar-Barbero variables, and we rewrite the constraints in terms of them, setting the classical formula... |
1012.0405 | Yousef Bisabr | Yousef Bisabr | Coincidence Problem in $f(R)$ Gravity Models | 10 pages, 2 figures. To appear in Physical Review D | Phys.Rev.D82:124041,2010 | 10.1103/PhysRevD.82.124041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The $f(R)$ gravity models formulated in Einstein conformal frame are
equivalent to Einstein gravity together with a minimally coupled scalar field.
The scalar field couples with the matter sector and the coupling term is given
by the conformal factor. We use this interacting model to derive a necessary
condition for ... | [
{
"created": "Thu, 2 Dec 2010 13:16:41 GMT",
"version": "v1"
}
] | 2011-03-07 | [
[
"Bisabr",
"Yousef",
""
]
] | The $f(R)$ gravity models formulated in Einstein conformal frame are equivalent to Einstein gravity together with a minimally coupled scalar field. The scalar field couples with the matter sector and the coupling term is given by the conformal factor. We use this interacting model to derive a necessary condition for al... |
1512.05208 | Mikhail Kagan | Mikhail Kagan | On anomaly freedom in spherically symmetric lattice loop quantization | 17 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Anomaly freedom has been one of the most important issues in canonical
quantization of gravity. In a physically meaningful (anomaly free) theory, the
constraint operators must be first class, and their commutator algebra is
expected to resemble the corresponding classical Poisson-bracket algebra. In
this paper, we re... | [
{
"created": "Sun, 13 Dec 2015 22:48:40 GMT",
"version": "v1"
}
] | 2015-12-17 | [
[
"Kagan",
"Mikhail",
""
]
] | Anomaly freedom has been one of the most important issues in canonical quantization of gravity. In a physically meaningful (anomaly free) theory, the constraint operators must be first class, and their commutator algebra is expected to resemble the corresponding classical Poisson-bracket algebra. In this paper, we revi... |
gr-qc/0303085 | Buonanno | Alessandra Buonanno | TASI Lectures on Gravitational Waves from the Early Universe | 37 pages, 8 figures; typos corrected | null | null | null | gr-qc hep-th | null | These lectures discuss how the direct detection of gravitational waves can be
used to probe the very early Universe. We review the main cosmological
mechanisms which could have produced relic gravitational waves, and compare
theoretical predictions with capabilities and time scales of current and
upcoming experiments... | [
{
"created": "Fri, 21 Mar 2003 16:01:43 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Aug 2004 16:13:55 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Buonanno",
"Alessandra",
""
]
] | These lectures discuss how the direct detection of gravitational waves can be used to probe the very early Universe. We review the main cosmological mechanisms which could have produced relic gravitational waves, and compare theoretical predictions with capabilities and time scales of current and upcoming experiments. |
0709.4636 | Benjamin Bahr | Benjamin Bahr, Thomas Thiemann | Gauge-invariant coherent states for Loop Quantum Gravity II: Non-abelian
gauge groups | 60 pages, 8 figures | Class.Quant.Grav.26:045012,2009 | 10.1088/0264-9381/26/4/045012 | null | gr-qc | null | This is the second paper concerning gauge-invariant coherent states for Loop
Quantum Gravity. Here, we deal with the gauge group SU(2), this being a
significant complication compared to the abelian U(1) case encountered in the
previous article. We study gauge-invariant coherent states on certain special
graphs by ana... | [
{
"created": "Fri, 28 Sep 2007 15:36:10 GMT",
"version": "v1"
}
] | 2009-02-12 | [
[
"Bahr",
"Benjamin",
""
],
[
"Thiemann",
"Thomas",
""
]
] | This is the second paper concerning gauge-invariant coherent states for Loop Quantum Gravity. Here, we deal with the gauge group SU(2), this being a significant complication compared to the abelian U(1) case encountered in the previous article. We study gauge-invariant coherent states on certain special graphs by analy... |
1210.3617 | Tiberiu Harko | Tiberiu Harko, Francisco S. N. Lobo | Irreversible thermodynamic description of interacting dark energy - dark
matter cosmological models | 10 pages, 4 figures; major modifications, accepted for publication in
PRD | Phys.Rev.D87:044018,2013 | 10.1103/PhysRevD.87.044018 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the interaction between dark energy and dark matter in the
framework of irreversible thermodynamics of open systems with matter
creation/annihilation. We consider dark energy and dark matter as an
interacting two component (scalar field and "ordinary" dark matter)
cosmological fluid in a homogeneous sp... | [
{
"created": "Fri, 12 Oct 2012 12:04:47 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Jan 2013 17:00:26 GMT",
"version": "v2"
}
] | 2013-02-08 | [
[
"Harko",
"Tiberiu",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | We investigate the interaction between dark energy and dark matter in the framework of irreversible thermodynamics of open systems with matter creation/annihilation. We consider dark energy and dark matter as an interacting two component (scalar field and "ordinary" dark matter) cosmological fluid in a homogeneous spat... |
1206.6508 | Aidan Keane | Brian O. J. Tupper, Aidan J. Keane and Jaume Carot | A classification of spherically symmetric spacetimes | null | Class. Quantum Grav. 29 (2012) 145016 | 10.1088/0264-9381/29/14/145016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A complete classification of locally spherically symmetric four-dimensional
Lorentzian spacetimes is given in terms of their local conformal symmetries.
The general solution is given in terms of canonical metric types and the
associated conformal Lie algebras. The analysis is based upon the local
conformal decomposit... | [
{
"created": "Wed, 27 Jun 2012 20:05:58 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Tupper",
"Brian O. J.",
""
],
[
"Keane",
"Aidan J.",
""
],
[
"Carot",
"Jaume",
""
]
] | A complete classification of locally spherically symmetric four-dimensional Lorentzian spacetimes is given in terms of their local conformal symmetries. The general solution is given in terms of canonical metric types and the associated conformal Lie algebras. The analysis is based upon the local conformal decompositio... |
1802.03394 | Filippo Vernizzi | David Langlois, Michele Mancarella, Karim Noui and Filippo Vernizzi | Mimetic gravity as DHOST theories | 22 pages, 1 figure, references added and discussion on the
instability modified. Matches the version published on JCAP | null | 10.1088/1475-7516/2019/02/036 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that theories of mimetic gravity can be viewed as degenerate
higher-order scalar-tensor (DHOST) theories that admit an extra local (gauge)
symmetry in addition to the usual diffeomorphism invariance. We reformulate and
classify mimetic theories in this perspective. Using the effective theory of
dark energy, r... | [
{
"created": "Fri, 9 Feb 2018 15:17:45 GMT",
"version": "v1"
},
{
"created": "Sun, 17 Mar 2019 11:43:22 GMT",
"version": "v2"
}
] | 2019-03-19 | [
[
"Langlois",
"David",
""
],
[
"Mancarella",
"Michele",
""
],
[
"Noui",
"Karim",
""
],
[
"Vernizzi",
"Filippo",
""
]
] | We show that theories of mimetic gravity can be viewed as degenerate higher-order scalar-tensor (DHOST) theories that admit an extra local (gauge) symmetry in addition to the usual diffeomorphism invariance. We reformulate and classify mimetic theories in this perspective. Using the effective theory of dark energy, rec... |
1412.4854 | Antonio C. Guti\'errez-Pi\~neres | Antonio C. Guti\'errez-Pi\~neres and Abra\~ao Capistrano | Conformastationary disk-haloes in Einstein-Maxwell gravity II. The
physical interpretation of the halo | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relativistic treatment of galaxies modelled as a rotating disk surrounded
by a magnetised material halo is considered. The galactic halo is modelled by a
magnetised mass-energy distribution described by the energy-momentum tensor of
a general fluid in canonical form. All the dynamics quantities characterising
the... | [
{
"created": "Tue, 16 Dec 2014 01:32:41 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Dec 2014 18:49:54 GMT",
"version": "v2"
}
] | 2014-12-19 | [
[
"Gutiérrez-Piñeres",
"Antonio C.",
""
],
[
"Capistrano",
"Abraão",
""
]
] | The relativistic treatment of galaxies modelled as a rotating disk surrounded by a magnetised material halo is considered. The galactic halo is modelled by a magnetised mass-energy distribution described by the energy-momentum tensor of a general fluid in canonical form. All the dynamics quantities characterising the p... |
2403.10694 | Mir Faizal | Mir Faizal | The end of spacetime | Essay received an honorable mention in the Gravity Research
Foundation Essay Competition 2023, 10 pages | Int. J. Mod. Phys. A 38, 2350188 (2023) | 10.1142/S0217751X23501889 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We will highlight that despite there being various approaches to quantum
gravity, there are universal approach-independent features of quantum gravity.
The geometry of spacetime becomes an emergent structure, which emerges from
some purely quantum gravitational degrees of freedom. We argue that these
quantum gravitat... | [
{
"created": "Fri, 15 Mar 2024 21:27:33 GMT",
"version": "v1"
}
] | 2024-04-04 | [
[
"Faizal",
"Mir",
""
]
] | We will highlight that despite there being various approaches to quantum gravity, there are universal approach-independent features of quantum gravity. The geometry of spacetime becomes an emergent structure, which emerges from some purely quantum gravitational degrees of freedom. We argue that these quantum gravitatio... |
gr-qc/0603081 | Leonardo Augusto Pach\'on Contreras | Leonardo A. Pachon and Jos\'e D. Sanabria-G\'omez | Note on reflection symmetry in stationary axisymmetric electrovacuum
spacetimes | 6 pages, LaTex. Some minor changes in the text | Class.Quant.Grav.23:3251-3254,2006 | 10.1088/0264-9381/23/9/N01 | null | gr-qc | null | Recently Kordas (1995, Class. Quantum Grav. 12 2037) and Meinel and
Neugebauer (1995, Class. Quantum Grav. 12 2045) studied the conditions for
reflection symmetry in stationary axisymmetric space--times in vacuum. They
found that a solution to the Einstein field equations is reflectionally
symmetric if their Ernst's ... | [
{
"created": "Mon, 20 Mar 2006 19:27:58 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Mar 2006 12:59:43 GMT",
"version": "v2"
},
{
"created": "Sat, 18 Nov 2006 19:00:23 GMT",
"version": "v3"
}
] | 2016-08-16 | [
[
"Pachon",
"Leonardo A.",
""
],
[
"Sanabria-Gómez",
"José D.",
""
]
] | Recently Kordas (1995, Class. Quantum Grav. 12 2037) and Meinel and Neugebauer (1995, Class. Quantum Grav. 12 2045) studied the conditions for reflection symmetry in stationary axisymmetric space--times in vacuum. They found that a solution to the Einstein field equations is reflectionally symmetric if their Ernst's po... |
1904.03554 | Kazufumi Takahashi | Kazufumi Takahashi, Hayato Motohashi, Masato Minamitsuji | Linear stability analysis of hairy black holes in quadratic degenerate
higher-order scalar-tensor theories: Odd-parity perturbations | 18 pages; matches published version | Phys. Rev. D 100, 024041 (2019) | 10.1103/PhysRevD.100.024041 | RUP-19-9, KOBE-COSMO-19-06, YITP-19-25 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study static spherically symmetric black hole solutions with a linearly
time-dependent scalar field and discuss their linear stability in the shift-
and reflection-symmetric subclass of quadratic degenerate higher-order
scalar-tensor (DHOST) theories. We present the explicit forms of the reduced
system of backgrou... | [
{
"created": "Sun, 7 Apr 2019 00:28:47 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jul 2019 07:45:58 GMT",
"version": "v2"
}
] | 2019-07-24 | [
[
"Takahashi",
"Kazufumi",
""
],
[
"Motohashi",
"Hayato",
""
],
[
"Minamitsuji",
"Masato",
""
]
] | We study static spherically symmetric black hole solutions with a linearly time-dependent scalar field and discuss their linear stability in the shift- and reflection-symmetric subclass of quadratic degenerate higher-order scalar-tensor (DHOST) theories. We present the explicit forms of the reduced system of background... |
1505.01774 | Stephan Schlamminger | S. Schlamminger, J.H. Gundlach, R.D. Newman | Recent measurements of the gravitational constant as a function of time | 7 pages, 3 figures, 2 tables; fixed a few typos; accepted for
publication in PRD | Phys. Rev. D 91, 121101 (2015) | 10.1103/PhysRevD.91.121101 | null | gr-qc physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A recent publication (J.D. Anderson et. al., EPL 110, 1002) presented a
strong correlation between the measured values of the gravitational constant
$G$ and the 5.9-year oscillation of the length of day. Here, we provide a
compilation of all published measurements of $G$ taken over the last 35 years.
A least squares ... | [
{
"created": "Thu, 7 May 2015 16:52:54 GMT",
"version": "v1"
},
{
"created": "Thu, 21 May 2015 12:40:02 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Schlamminger",
"S.",
""
],
[
"Gundlach",
"J. H.",
""
],
[
"Newman",
"R. D.",
""
]
] | A recent publication (J.D. Anderson et. al., EPL 110, 1002) presented a strong correlation between the measured values of the gravitational constant $G$ and the 5.9-year oscillation of the length of day. Here, we provide a compilation of all published measurements of $G$ taken over the last 35 years. A least squares re... |
2106.04057 | Truong Xuan Pham | Pham Truong Xuan | Cauchy and Goursat problems for the generalized spin zero rest-mass
fields on Minkowski spacetime | 42 pages, 3 figures | Classical and Quantum Gravity, 2022 | 10.1088/1361-6382/ac43d3 | null | gr-qc math-ph math.AP math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the Cauchy and Goursat problems of the spin-$n/2$
zero rest-mass equations on Minkowski spacetime by using the conformal
geometric method. In our strategy, we prove the wellposedness of the Cauchy
problem in Einstein's cylinder. Then we establish pointwise decays of the
fields and prove the en... | [
{
"created": "Tue, 8 Jun 2021 02:20:48 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Nov 2021 23:36:45 GMT",
"version": "v2"
}
] | 2023-07-26 | [
[
"Xuan",
"Pham Truong",
""
]
] | In this paper, we study the Cauchy and Goursat problems of the spin-$n/2$ zero rest-mass equations on Minkowski spacetime by using the conformal geometric method. In our strategy, we prove the wellposedness of the Cauchy problem in Einstein's cylinder. Then we establish pointwise decays of the fields and prove the ener... |
gr-qc/9706040 | Jean-Pierre De Villiers | Jean-Pierre De Villiers | Dynamics of Cosmic Strings in Schwarzschild Spacetime | 12 pages, latex, 3 figures. To appear in Proceedings of Seventh
Canadian Conference on General Relativity and Relativistic Astrophysics | null | null | Alberta Thy 12-97 | gr-qc | null | Cosmic strings are topological defects thought to have formed early in the
life of the universe. If such objects exist, a study of their interaction with
black holes is of interest. The equations of motion of a cosmic string have the
form of highly non-linear wave equations. General analytic solutions, except
for mot... | [
{
"created": "Fri, 13 Jun 1997 16:32:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"De Villiers",
"Jean-Pierre",
""
]
] | Cosmic strings are topological defects thought to have formed early in the life of the universe. If such objects exist, a study of their interaction with black holes is of interest. The equations of motion of a cosmic string have the form of highly non-linear wave equations. General analytic solutions, except for motio... |
0804.2900 | Sean Gryb B | Sean B. Gryb | Jacobi's Principle and the Disappearance of Time | Published version. Significant amendments to presentation. 27 pages | Phys.Rev.D81:044035,2010 | 10.1103/PhysRevD.81.044035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Jacobi's action principle is known to lead to a problem of time. For example,
the timelessness of the Wheeler-DeWitt equation can be seen as resulting from
using Jacobi's principle to define the dynamics of 3-geometries through
superspace. In addition, using Jacobi's principle for non-relativistic
particles is equiva... | [
{
"created": "Fri, 18 Apr 2008 18:18:48 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Jan 2009 21:08:54 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Feb 2010 16:15:16 GMT",
"version": "v3"
}
] | 2010-04-06 | [
[
"Gryb",
"Sean B.",
""
]
] | Jacobi's action principle is known to lead to a problem of time. For example, the timelessness of the Wheeler-DeWitt equation can be seen as resulting from using Jacobi's principle to define the dynamics of 3-geometries through superspace. In addition, using Jacobi's principle for non-relativistic particles is equivale... |
gr-qc/0602042 | Farook Rahaman | F. Rahaman, B.C.Bhui and M. Kalam | Non static local string in higher dimensional gravity | 6 pages | Int.J.Theor.Phys. 44 (2005) 1413-1418 | null | null | gr-qc | null | We analyze the space-time structure of local gauge string with a
phenomenological energy momentum tensor, as prescribed by Vilenkin in an
arbitrary number of space-time dimensions with a non-zero cosmological constant
>. A set of solutions of full non-linear Einstein's equations for the interior
region of such a stri... | [
{
"created": "Mon, 13 Feb 2006 07:56:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rahaman",
"F.",
""
],
[
"Bhui",
"B. C.",
""
],
[
"Kalam",
"M.",
""
]
] | We analyze the space-time structure of local gauge string with a phenomenological energy momentum tensor, as prescribed by Vilenkin in an arbitrary number of space-time dimensions with a non-zero cosmological constant >. A set of solutions of full non-linear Einstein's equations for the interior region of such a string... |
gr-qc/0405010 | Michael Petri | Michael Petri | On the origin of the matter-antimatter asymmetry in self-gravitating
systems at ultra-high temperatures | 51 pages, 2 figures, appendix "thermodynamics of an ideal gas" (14
pages) | null | null | null | gr-qc hep-th | null | It is shown, that self-gravitating systems can be classified by a
dimensionless constant positive number $\kappa = S T / E$, which can be
determined from the (global) values for the entropy, temperature and (total)
energy. The Kerr-Newman black hole family is characterized by $\kappa$ in the
range $0-1/2$, depending ... | [
{
"created": "Sun, 2 May 2004 19:08:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Petri",
"Michael",
""
]
] | It is shown, that self-gravitating systems can be classified by a dimensionless constant positive number $\kappa = S T / E$, which can be determined from the (global) values for the entropy, temperature and (total) energy. The Kerr-Newman black hole family is characterized by $\kappa$ in the range $0-1/2$, depending on... |
2111.00502 | Matteo Luca Ruggiero | Matteo Luca Ruggiero, Antonello Ortolan | Gravitomagnetic resonance and gravitational waves | Submitted to the proceedings of the Sixteenth Marcel Grossmann
Meeting; largely based on arXiv:2011.01663 | The Sixteenth Marcel Grossmann Meeting. February 2023, 4019-4025 | 10.1142/9789811269776_0335 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that using Fermi coordinates it is possible to describe the
gravitational field of a wave using a gravitoelectromagnetic analogy. In
particular, we show that using this approach, a new phenomenon, called
gravitomagnetic resonance, may appear. We describe it both from classical and
quantum viewpoints, and sugg... | [
{
"created": "Sun, 31 Oct 2021 13:52:28 GMT",
"version": "v1"
}
] | 2023-01-31 | [
[
"Ruggiero",
"Matteo Luca",
""
],
[
"Ortolan",
"Antonello",
""
]
] | We show that using Fermi coordinates it is possible to describe the gravitational field of a wave using a gravitoelectromagnetic analogy. In particular, we show that using this approach, a new phenomenon, called gravitomagnetic resonance, may appear. We describe it both from classical and quantum viewpoints, and sugges... |
1610.07338 | Ekrem Aydiner Dr | Ekrem Aydiner | Chaotic universe model: Lotka-Volterra dynamics of the universe
evolution | 9 pages. Figures have been added into the tex | null | 10.1038/s41598-017-18681-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, we consider nonlinear interactions between components such as
dark energy, dark, matter and radiation in the Friedman-Robertson-Walker
space-time framework and propose a simple interaction model based on time
evolution of the densities of these components. By using this model we show
that these interac... | [
{
"created": "Mon, 24 Oct 2016 09:33:51 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Sep 2017 16:09:41 GMT",
"version": "v2"
},
{
"created": "Sat, 14 Oct 2017 11:58:39 GMT",
"version": "v3"
}
] | 2021-12-28 | [
[
"Aydiner",
"Ekrem",
""
]
] | In this study, we consider nonlinear interactions between components such as dark energy, dark, matter and radiation in the Friedman-Robertson-Walker space-time framework and propose a simple interaction model based on time evolution of the densities of these components. By using this model we show that these interacti... |
2008.00943 | Orest Hrycyna | Orest Hrycyna | The non-minimal coupling constant and the primordial de Sitter state | 22 pages; 6 multiple figures; (v2) published version | Eur. Phys. J. C 80, 817 (2020) | 10.1140/epjc/s10052-020-8397-5 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamical systems methods are used to investigate dynamics of a flat
Friedmann-Robertson-Walker cosmological model with the non-minimally coupled
scalar field and a potential function. Performed analysis distinguishes the
value of non-minimal coupling constant parameter $\xi=\frac{3}{16}$, which is
the conformal coup... | [
{
"created": "Mon, 3 Aug 2020 15:24:11 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Sep 2020 09:04:42 GMT",
"version": "v2"
}
] | 2020-09-07 | [
[
"Hrycyna",
"Orest",
""
]
] | Dynamical systems methods are used to investigate dynamics of a flat Friedmann-Robertson-Walker cosmological model with the non-minimally coupled scalar field and a potential function. Performed analysis distinguishes the value of non-minimal coupling constant parameter $\xi=\frac{3}{16}$, which is the conformal coupli... |
0705.2131 | Winfried Zimdahl | Winfried Zimdahl | Dark Energy: A Unifying View | 9 pages, selected for "Honorable Mention" by the Gravity Research
Foundation | Int.J.Mod.Phys.D17:651-658,2008 | 10.1142/S0218271808012395 | null | gr-qc astro-ph hep-th | null | Different models of the cosmic substratum which pretend to describe the
present stage of accelerated expansion of the Universe like the $\Lambda$CDM
model or a Chaplygin gas, can be seen as special realizations of a holographic
dark energy cosmology if the option of an interaction between pressurless dark
matter and ... | [
{
"created": "Tue, 15 May 2007 12:18:10 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Zimdahl",
"Winfried",
""
]
] | Different models of the cosmic substratum which pretend to describe the present stage of accelerated expansion of the Universe like the $\Lambda$CDM model or a Chaplygin gas, can be seen as special realizations of a holographic dark energy cosmology if the option of an interaction between pressurless dark matter and da... |
1810.05182 | Sina Bahrami | Sina Bahrami | Constraining Violations of the Weak Equivalence Principle in the Dark
Sector | 47 pages, 8 figures | JCAP 05 (2019) 050 | 10.1088/1475-7516/2019/05/050 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effective field theory of dark energy is generalized to incorporate dark
matter, which is modelled using a complex scalar field with a global $U(1)$
symmetry. The dark matter model used here has similarities to models of
ultralight axion. Generic interaction terms in the dark matter sector violate
the weak equiva... | [
{
"created": "Thu, 11 Oct 2018 18:03:11 GMT",
"version": "v1"
},
{
"created": "Fri, 31 May 2019 17:45:40 GMT",
"version": "v2"
}
] | 2019-06-05 | [
[
"Bahrami",
"Sina",
""
]
] | The effective field theory of dark energy is generalized to incorporate dark matter, which is modelled using a complex scalar field with a global $U(1)$ symmetry. The dark matter model used here has similarities to models of ultralight axion. Generic interaction terms in the dark matter sector violate the weak equivale... |
2112.09967 | Michael Hobson | Michael Hobson, Anthony Lasenby | Note on the absence of the second clock effect in Weyl gauge theories of
gravity | 5 pages, no figures, accepted for publication as a Letter in PRD.
Minor edits to match published version. arXiv admin note: text overlap with
arXiv:2009.06407 | null | 10.1103/PhysRevD.105.L021501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reconsider the status of the so-called second clock effect in Weyl gauge
theories of gravity, which are invariant both under local Poincar\'e
transformations and local changes of scale. In particular, we revisit and
extend our previous demonstration that the second clock effect does not occur
in such theories, in ... | [
{
"created": "Sat, 18 Dec 2021 16:59:15 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jan 2022 09:55:42 GMT",
"version": "v2"
}
] | 2022-02-09 | [
[
"Hobson",
"Michael",
""
],
[
"Lasenby",
"Anthony",
""
]
] | We reconsider the status of the so-called second clock effect in Weyl gauge theories of gravity, which are invariant both under local Poincar\'e transformations and local changes of scale. In particular, we revisit and extend our previous demonstration that the second clock effect does not occur in such theories, in or... |
1304.5206 | S Habib Mazharimousavi | S. Habib Mazharimousavi, M. Halilsoy and Ozay Gurtug | A new Einstein-nonlinear electrodynamics solution in 2+1-dimensions | 9 pages one figure. With major revision and singularity analysis is
added | Eur. Phys. J. C (2014) 74:2735 | 10.1140/epjc/s10052-014-2735-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a class of solutions in $2+1-$dimensional Einstein-Power-Maxwell
theory for circularly symmetric electric field. The electromagnetic field is
considered with an angular component given by $% F_{\mu \nu }=E_{0}\delta_{\mu
}^{t}\delta_{\nu }^{\theta }$ for $E_{0}=$ constant. First, we show that the
metric ... | [
{
"created": "Wed, 17 Apr 2013 10:36:32 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Dec 2013 17:42:34 GMT",
"version": "v2"
}
] | 2014-01-31 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
],
[
"Gurtug",
"Ozay",
""
]
] | We introduce a class of solutions in $2+1-$dimensional Einstein-Power-Maxwell theory for circularly symmetric electric field. The electromagnetic field is considered with an angular component given by $% F_{\mu \nu }=E_{0}\delta_{\mu }^{t}\delta_{\nu }^{\theta }$ for $E_{0}=$ constant. First, we show that the metric fo... |
2305.05515 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | Inflationary Attractors Predictions for Static Neutron Stars in the
Mass-Gap Region | PRD Accepted, abstract reduced due to arXiv restrictions | null | 10.1103/PhysRevD.107.104039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study static neutron stars in the context of several
inflationary models which are popular in cosmology. These inflationary models
are non-minimally coupled scalar theories which yield a viable inflationary
phenomenology in both Jordan and Einstein frames. By considering the
constraints from inflation... | [
{
"created": "Tue, 9 May 2023 15:09:26 GMT",
"version": "v1"
}
] | 2023-05-31 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | In this work we study static neutron stars in the context of several inflationary models which are popular in cosmology. These inflationary models are non-minimally coupled scalar theories which yield a viable inflationary phenomenology in both Jordan and Einstein frames. By considering the constraints from inflationar... |
1509.06691 | Bogeun Gwak | Bogeun Gwak, Bum-Hoon Lee | Cosmic Censorship of Rotating Anti-de Sitter Black Hole | 8 pages, published version in JCAP | JCAP 1602, no. 02, 015 (2016) | 10.1088/1475-7516/2016/02/015 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We test the validity of cosmic censorship in the rotating anti-de Sitter
black hole. For this purpose, we investigate whether the extremal black hole
can be overspun by the particle absorption. The particle absorption will change
the mass and angular momentum of the black hole, which is analyzed using the
Hamilton-Ja... | [
{
"created": "Tue, 22 Sep 2015 17:20:48 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Feb 2016 12:29:09 GMT",
"version": "v2"
}
] | 2016-02-11 | [
[
"Gwak",
"Bogeun",
""
],
[
"Lee",
"Bum-Hoon",
""
]
] | We test the validity of cosmic censorship in the rotating anti-de Sitter black hole. For this purpose, we investigate whether the extremal black hole can be overspun by the particle absorption. The particle absorption will change the mass and angular momentum of the black hole, which is analyzed using the Hamilton-Jaco... |
2304.02753 | Mykhailo Tataryn | Mykhailo Tataryn and Mykola Stetsko | Thermodynamics of a static electric-magnetic black hole in
Einstein-Born-Infeld-AdS theory with different horizon geometries | null | General Relativity and Gravitation. Vol. 53, 72 (2021) | 10.1007/s10714-021-02842-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider black hole solutions with electric and magnetic sources in the
four-dimensional Einstein-Born-Infeld-AdS theory with spherical, planar and
hyperbolic horizon geometries. Exact analytical solutions for the metric
function, electric and magnetic fields were obtained and they recover the
RN-AdS black hole in... | [
{
"created": "Wed, 5 Apr 2023 21:12:41 GMT",
"version": "v1"
}
] | 2023-04-07 | [
[
"Tataryn",
"Mykhailo",
""
],
[
"Stetsko",
"Mykola",
""
]
] | We consider black hole solutions with electric and magnetic sources in the four-dimensional Einstein-Born-Infeld-AdS theory with spherical, planar and hyperbolic horizon geometries. Exact analytical solutions for the metric function, electric and magnetic fields were obtained and they recover the RN-AdS black hole in t... |
0801.1882 | Muhammad Sharif | M. Sharif and Kanwal Nazir | Energy-Momentum Problem of Bell-Szekeres Metric in General Relativity
and Teleparallel Gravity | 21 pages, accepted for publication in Braz. J. Phys | Braz.J.Phys.38:156-166,2008 | 10.1590/S0103-97332008000100028 | null | gr-qc | null | This paper is devoted to the investigation of the energy-momentum problem in
two theories, i.e., General Relativity and teleparallel gravity. We use
Einstein, Landau-Lifshitz, Bergmann-Thomson and M\"{o}ller's prescriptions to
evaluate energy-momentum distribution of Bell-Szekeres metric in both the
theories. It is s... | [
{
"created": "Sat, 12 Jan 2008 07:45:57 GMT",
"version": "v1"
}
] | 2011-08-31 | [
[
"Sharif",
"M.",
""
],
[
"Nazir",
"Kanwal",
""
]
] | This paper is devoted to the investigation of the energy-momentum problem in two theories, i.e., General Relativity and teleparallel gravity. We use Einstein, Landau-Lifshitz, Bergmann-Thomson and M\"{o}ller's prescriptions to evaluate energy-momentum distribution of Bell-Szekeres metric in both the theories. It is sho... |
1507.00329 | Martin Bojowald | Martin Bojowald, Suddhasattwa Brahma and Juan D. Reyes | Covariance in models of loop quantum gravity: Spherical symmetry | 29 pages | Phys. Rev. D 92, 045043 (2015) | 10.1103/PhysRevD.92.045043 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spherically symmetric models of loop quantum gravity have been studied
recently by different methods that aim to deal with structure functions in the
usual constraint algebra of gravitational systems. As noticed by Gambini and
Pullin, a linear redefinition of the constraints (with phase-space dependent
coefficients) ... | [
{
"created": "Wed, 1 Jul 2015 19:49:56 GMT",
"version": "v1"
}
] | 2015-09-09 | [
[
"Bojowald",
"Martin",
""
],
[
"Brahma",
"Suddhasattwa",
""
],
[
"Reyes",
"Juan D.",
""
]
] | Spherically symmetric models of loop quantum gravity have been studied recently by different methods that aim to deal with structure functions in the usual constraint algebra of gravitational systems. As noticed by Gambini and Pullin, a linear redefinition of the constraints (with phase-space dependent coefficients) ca... |
2212.07458 | Ra\'ul Carballo-Rubio | Ra\'ul Carballo-Rubio, Francesco Di Filippo, Stefano Liberati,
Costantino Pacilio and Matt Visser | Comment on "Regular evaporating black holes with stable cores" | v2: 8 pages, as published in Physical Review D | Phys.Rev.D 108 (2023) 12, 128501 | 10.1103/PhysRevD.108.128501 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Regular black holes are generically unstable because of the classical
phenomenon that goes by the name of "mass inflation" which destabilizes the
inner horizon. In a recent article, [Phys.Rev.D~107~(2023)~2,~024005], it is
argued that semiclassical effects due to Hawking radiation can cure this
instability, and some ... | [
{
"created": "Wed, 14 Dec 2022 19:08:23 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Jun 2024 09:48:17 GMT",
"version": "v2"
}
] | 2024-06-04 | [
[
"Carballo-Rubio",
"Raúl",
""
],
[
"Di Filippo",
"Francesco",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Pacilio",
"Costantino",
""
],
[
"Visser",
"Matt",
""
]
] | Regular black holes are generically unstable because of the classical phenomenon that goes by the name of "mass inflation" which destabilizes the inner horizon. In a recent article, [Phys.Rev.D~107~(2023)~2,~024005], it is argued that semiclassical effects due to Hawking radiation can cure this instability, and some co... |
2404.16729 | Souradeep Pal | Souradeep Pal and K Rajesh Nayak | Tidal reconstruction of neutron star mergers from their late inspiral | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the measurement correlation between the effective spin and the
effective tidal deformability in gravitational wave signals from binary neutron
star mergers. To efficiently measure the effective tidal deformability
parameter, we exploit the fact that the tidal effects in a binary system are
prominent wh... | [
{
"created": "Thu, 25 Apr 2024 16:40:31 GMT",
"version": "v1"
},
{
"created": "Thu, 30 May 2024 10:24:06 GMT",
"version": "v2"
},
{
"created": "Sat, 27 Jul 2024 01:01:38 GMT",
"version": "v3"
}
] | 2024-07-30 | [
[
"Pal",
"Souradeep",
""
],
[
"Nayak",
"K Rajesh",
""
]
] | We investigate the measurement correlation between the effective spin and the effective tidal deformability in gravitational wave signals from binary neutron star mergers. To efficiently measure the effective tidal deformability parameter, we exploit the fact that the tidal effects in a binary system are prominent when... |
1109.0300 | T. P. Singh | Kinjalk Lochan and T. P. Singh | Trace dynamics and a noncommutative special relativity | 9 pages. To appear in Physics Letters A | null | 10.1016/j.physleta.2011.09.003 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Trace Dynamics is a classical dynamical theory of noncommuting matrices in
which cyclic permutation inside a trace is used to define the derivative with
respect to an operator. We use the methods of Trace Dynamics to construct a
noncommutative special relativity. We define a line-element using the Trace
over spacetim... | [
{
"created": "Thu, 1 Sep 2011 20:41:35 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Lochan",
"Kinjalk",
""
],
[
"Singh",
"T. P.",
""
]
] | Trace Dynamics is a classical dynamical theory of noncommuting matrices in which cyclic permutation inside a trace is used to define the derivative with respect to an operator. We use the methods of Trace Dynamics to construct a noncommutative special relativity. We define a line-element using the Trace over spacetime ... |
1512.02932 | Despoina Pazouli | Despoina Pazouli and Christos G. Tsagas | Gravitational-wave implications for structure formation: A second-order
approach | typos corrected. published version | Phys. Rev. D 93, 063520 (2016) | 10.1103/PhysRevD.93.063520 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves are propagating undulations in the spacetime fabric,
which interact very weakly with their environment. In cosmology,
gravitational-wave distortions are produced by most of the inflationary
scenarios and their anticipated detection should open a new window to the early
universe. Motivated by the r... | [
{
"created": "Wed, 9 Dec 2015 16:33:49 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Feb 2016 20:13:40 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Mar 2016 19:42:34 GMT",
"version": "v3"
}
] | 2016-03-30 | [
[
"Pazouli",
"Despoina",
""
],
[
"Tsagas",
"Christos G.",
""
]
] | Gravitational waves are propagating undulations in the spacetime fabric, which interact very weakly with their environment. In cosmology, gravitational-wave distortions are produced by most of the inflationary scenarios and their anticipated detection should open a new window to the early universe. Motivated by the rel... |
1909.00473 | Daniela Doneva | Daniela D. Doneva and Stoytcho S. Yazadjiev | Mixed configurations of tensor-multi-scalar solitons and neutron stars | 13 pages, 6 figures. arXiv admin note: text overlap with
arXiv:1901.06379 | Phys. Rev. D 101, 024009 (2020) | 10.1103/PhysRevD.101.024009 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we consider special classes of massive
tensor-multi-scalar theories of gravity whose target space metric admits
Killing field(s) with a periodic flow. For such tensor-multi-scalar theories we
show that there exist mixed configurations of tenor-multi-scalar solitons and
relativistic (neutron) star... | [
{
"created": "Sun, 1 Sep 2019 20:58:40 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Doneva",
"Daniela D.",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | In the present paper we consider special classes of massive tensor-multi-scalar theories of gravity whose target space metric admits Killing field(s) with a periodic flow. For such tensor-multi-scalar theories we show that there exist mixed configurations of tenor-multi-scalar solitons and relativistic (neutron) stars.... |
2407.21426 | Ahmad Sheykhi | Ahmad Sheykhi, Leila Liravi, Kimet Jusufi | Nonsingular universe through zero-point length cosmology | 12 pages, 10 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Taking into account the zero-point length correction to the gravitational
potential and using the entropic force scenario, we derive a modified
expression for entropy that includes zero-point length correction terms. We
then apply the thermodynamics-gravity conjecture and the emergent gravity
scenario to derive the m... | [
{
"created": "Wed, 31 Jul 2024 08:20:52 GMT",
"version": "v1"
}
] | 2024-08-01 | [
[
"Sheykhi",
"Ahmad",
""
],
[
"Liravi",
"Leila",
""
],
[
"Jusufi",
"Kimet",
""
]
] | Taking into account the zero-point length correction to the gravitational potential and using the entropic force scenario, we derive a modified expression for entropy that includes zero-point length correction terms. We then apply the thermodynamics-gravity conjecture and the emergent gravity scenario to derive the mod... |
2406.11936 | Jaume Haro | Jaume de Haro | Relations between Newtonian and relativistic cosmology | 13 pages. Version published in Universe | Universe 10, no. 6: 263. (2024) | 10.3390/universe10060263 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We start with the cosmic Friedmann equations, where we adopt a novel
perspective rooted in a Lagrangian formulation grounded in Newtonian mechanics
and the first law of thermodynamics. Our investigation operates under the
assumption that the universe is populated by either a perfect fluid or a scalar
field. By elucid... | [
{
"created": "Mon, 17 Jun 2024 16:11:41 GMT",
"version": "v1"
}
] | 2024-06-19 | [
[
"de Haro",
"Jaume",
""
]
] | We start with the cosmic Friedmann equations, where we adopt a novel perspective rooted in a Lagrangian formulation grounded in Newtonian mechanics and the first law of thermodynamics. Our investigation operates under the assumption that the universe is populated by either a perfect fluid or a scalar field. By elucidat... |
1908.04313 | Aindri\'u Conroy | Aindri\'u Conroy and Tomi Koivisto | Parity-Violating Gravity and GW170817 in Non-Riemannian Cosmology | 25 pages including references | null | 10.1088/1475-7516/2019/12/016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmological propagation of tensor perturbations is studied in the
context of parity-violating extensions of the symmetric teleparallel equivalent
of General Relativity theory. This non-Riemannian formulation allows for a
wider variety of consistent extensions than the metric formulation of gravity
theory. It is ... | [
{
"created": "Mon, 12 Aug 2019 18:03:40 GMT",
"version": "v1"
}
] | 2019-12-11 | [
[
"Conroy",
"Aindriú",
""
],
[
"Koivisto",
"Tomi",
""
]
] | The cosmological propagation of tensor perturbations is studied in the context of parity-violating extensions of the symmetric teleparallel equivalent of General Relativity theory. This non-Riemannian formulation allows for a wider variety of consistent extensions than the metric formulation of gravity theory. It is fo... |
1501.07699 | Guillem Dom\`enech | Guillem Dom\`enech and Misao Sasaki | Conformal Frame Dependence of Inflation | 17 pages, 5 figures | JCAP 1504 (2015) 022 | 10.1088/1475-7516/2015/04/022 | YITP-15-6 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Physical equivalence between different conformal frames in scalar-tensor
theory of gravity is a known fact. However, assuming that matter minimally
couples to the metric of a particular frame, which we call the matter Jordan
frame, the matter point of view of the universe may vary from frame to frame.
Thus, there is ... | [
{
"created": "Fri, 30 Jan 2015 08:40:41 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Oct 2015 05:05:06 GMT",
"version": "v2"
}
] | 2015-10-16 | [
[
"Domènech",
"Guillem",
""
],
[
"Sasaki",
"Misao",
""
]
] | Physical equivalence between different conformal frames in scalar-tensor theory of gravity is a known fact. However, assuming that matter minimally couples to the metric of a particular frame, which we call the matter Jordan frame, the matter point of view of the universe may vary from frame to frame. Thus, there is a ... |
2101.12094 | Maitraya Kanta Bhattacharyya | Maitraya K Bhattacharyya, David Hilditch, K Rajesh Nayak, Sarah
Renkhoff, Hannes R. R\"uter and Bernd Bruegmann | An Implementation of DF-GHG with Application to Spherical Black Hole
Excision | 18 pages, 7 figures | Phys. Rev. D 103, 064072 (2021) | 10.1103/PhysRevD.103.064072 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an implementation of the dual foliation generalized harmonic gauge
(DF-GHG) formulation within the pseudospectral code bamps. The formalism
promises to give greater freedom in the choice of coordinates that can be used
in numerical relativity. As a specific application we focus here on the
treatment of bla... | [
{
"created": "Thu, 28 Jan 2021 16:30:32 GMT",
"version": "v1"
}
] | 2021-04-07 | [
[
"Bhattacharyya",
"Maitraya K",
""
],
[
"Hilditch",
"David",
""
],
[
"Nayak",
"K Rajesh",
""
],
[
"Renkhoff",
"Sarah",
""
],
[
"Rüter",
"Hannes R.",
""
],
[
"Bruegmann",
"Bernd",
""
]
] | We present an implementation of the dual foliation generalized harmonic gauge (DF-GHG) formulation within the pseudospectral code bamps. The formalism promises to give greater freedom in the choice of coordinates that can be used in numerical relativity. As a specific application we focus here on the treatment of black... |
1102.2948 | Hanno Sahlmann | Hanno Sahlmann | Energy equipartition and minimal radius in entropic gravity | 5 pages, 3 figures, uses RevTeX 4.1. v2: Some references, and note on
size of corrections added, some cosmetic changes. Now identical with
published version | Phys. Rev. D 84, 104010 (2011) | 10.1103/PhysRevD.84.104010 | APCTP Pre2011-003 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we investigate the assumption of equipartition of energy in
arguments for the entropic nature of gravity. It has already been pointed out
by other authors that equipartition is not valid for low temperatures. Here we
additionally point out that it is similarly not valid for systems with bounded
energ... | [
{
"created": "Tue, 15 Feb 2011 02:33:12 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Nov 2011 00:54:50 GMT",
"version": "v2"
}
] | 2011-11-08 | [
[
"Sahlmann",
"Hanno",
""
]
] | In this article, we investigate the assumption of equipartition of energy in arguments for the entropic nature of gravity. It has already been pointed out by other authors that equipartition is not valid for low temperatures. Here we additionally point out that it is similarly not valid for systems with bounded energy.... |
0808.3445 | Sergey Vyatchanin | Sergey P. Vyatchanin | Displacement-noise-free resonant speed meter for gravitational-wave
detection | 7 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate that speedmeter, based on double pumped resonant Sagnac
interferometer, can be used as a displacement noise free gravitational-wave
(GW) detector. The displacement noise of cavity mirrors can be completely
excluded through a proper linear combination of the output signals. We show
that in low-frequency... | [
{
"created": "Tue, 26 Aug 2008 06:10:45 GMT",
"version": "v1"
}
] | 2008-08-27 | [
[
"Vyatchanin",
"Sergey P.",
""
]
] | We demonstrate that speedmeter, based on double pumped resonant Sagnac interferometer, can be used as a displacement noise free gravitational-wave (GW) detector. The displacement noise of cavity mirrors can be completely excluded through a proper linear combination of the output signals. We show that in low-frequency r... |
2402.11503 | Rajesh Nayak K | Naresh Dadhich and K Rajesh Nayak | C. V. Vishveshwara (Vishu) On The Black Hole Trek | null | Resonance, Vol 29, P 11(2024) | null | null | gr-qc hep-th physics.hist-ph | http://creativecommons.org/licenses/by/4.0/ | With his seminal and pioneering work on the stability of the Schwarzschild
black hole and its interaction with gravitational radiation, Vishu had opened a
new window on black hole astrophysics. One of the interesting results that soon
followed was that "a black hole has no hair", it is entirely specified by the
three... | [
{
"created": "Sun, 18 Feb 2024 08:25:56 GMT",
"version": "v1"
}
] | 2024-02-20 | [
[
"Dadhich",
"Naresh",
""
],
[
"Nayak",
"K Rajesh",
""
]
] | With his seminal and pioneering work on the stability of the Schwarzschild black hole and its interaction with gravitational radiation, Vishu had opened a new window on black hole astrophysics. One of the interesting results that soon followed was that "a black hole has no hair", it is entirely specified by the three p... |
gr-qc/9701020 | null | Cosimo Stornaiolo and Giampiero Esposito | Multimomentum Maps in General Relativity | 9 pages, Latex, to appear in Proceedings of the Second Conference on
Constrained Dynamics and Quantum Gravity, Santa Margherita Ligure, Italy,
17-21 September 1996. Edited by V. de Alfaro et al | Nucl.Phys.Proc.Suppl. 57 (1997) 241-244 | 10.1016/S0920-5632(97)00390-3 | DSF preprint 97/3 | gr-qc | null | The properties of multimomentum maps on null hypersurfaces, and their
relation with the constraint analysis of General Relativity, are described.
Unlike the case of spacelike hypersurfaces, some constraints which are second
class in the Hamiltonian formalism turn out to contribute to the multimomentum
map.
| [
{
"created": "Fri, 10 Jan 1997 18:06:57 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Stornaiolo",
"Cosimo",
""
],
[
"Esposito",
"Giampiero",
""
]
] | The properties of multimomentum maps on null hypersurfaces, and their relation with the constraint analysis of General Relativity, are described. Unlike the case of spacelike hypersurfaces, some constraints which are second class in the Hamiltonian formalism turn out to contribute to the multimomentum map. |
2203.01811 | Gokhan Alkac | Gokhan Alkac, Gokcen Deniz Ozen, Gun Suer | Lower-dimensional Limits of Cubic Lovelock Gravity | 11 pages + appendix; v2: minor corrections, references added; v3:
introduction and section 2 improved, more references and a link to
Mathematica files added; v4: Title changed, introduction and last section
revised, version to appear in Nuclear Physics B; v5: 2 references about
Lovelock black holes added, minor... | null | 10.1016/j.nuclphysb.2022.116027 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we obtain the lower-dimensional limits $(p=2,3,4,5,6)$ of
cubic Lovelock gravity through a regularized Kaluza-Klein reduction. By taking
a flat internal space for simplicity, we also study the static black hole
solutions in the resulting theories. We show that the solutions match with the
ones obtained... | [
{
"created": "Wed, 2 Mar 2022 17:04:29 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Mar 2022 15:37:48 GMT",
"version": "v2"
},
{
"created": "Wed, 27 Jul 2022 14:31:42 GMT",
"version": "v3"
},
{
"created": "Fri, 25 Nov 2022 08:36:05 GMT",
"version": "v4"
},
{
"cre... | 2023-01-18 | [
[
"Alkac",
"Gokhan",
""
],
[
"Ozen",
"Gokcen Deniz",
""
],
[
"Suer",
"Gun",
""
]
] | In this paper, we obtain the lower-dimensional limits $(p=2,3,4,5,6)$ of cubic Lovelock gravity through a regularized Kaluza-Klein reduction. By taking a flat internal space for simplicity, we also study the static black hole solutions in the resulting theories. We show that the solutions match with the ones obtained f... |
1004.4073 | Robert Beig | Robert Beig | The stationary n-body problem in general relativity | Talk at 'Complex Analysis & Dynamical Systems IV' held on May 18-22,
2009, in Nahariya, Israel. Accepted for publication in Contemporary
Mathematics | Complex Analysis and Dynamical Systems IV, Part 2, 47-53, Contemp.
Math., 554 (2011) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this talk I describe recent joint works with R.Schoen and with G.Gibbons
and R.Schoen which prove the non-existence of certain asymptotically flat,
stationary solutions of the Einstein equations with more than one body. The
basic restriction is for example satisfied when spacetime has an isometry
reversing the sig... | [
{
"created": "Fri, 23 Apr 2010 08:52:07 GMT",
"version": "v1"
}
] | 2012-09-17 | [
[
"Beig",
"Robert",
""
]
] | In this talk I describe recent joint works with R.Schoen and with G.Gibbons and R.Schoen which prove the non-existence of certain asymptotically flat, stationary solutions of the Einstein equations with more than one body. The basic restriction is for example satisfied when spacetime has an isometry reversing the sign ... |
gr-qc/9211012 | Roman/Physics | Thomas A. Roman | Inflating Lorentzian Wormholes | 24 pgs | Phys.Rev. D47 (1993) 1370-1379 | 10.1103/PhysRevD.47.1370 | CCSU-92-001 | gr-qc | null | It has been speculated that Lorentzian wormholes of the Morris- Thorne type
might be allowed by the laws of physics at submicroscopic, e.g. Planck, scales
and that a sufficiently advanced civilization might be able to enlarge them to
classical size. The purpose of this paper is to explore the possibility that
inflati... | [
{
"created": "Mon, 9 Nov 1992 21:36:25 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Roman",
"Thomas A.",
""
]
] | It has been speculated that Lorentzian wormholes of the Morris- Thorne type might be allowed by the laws of physics at submicroscopic, e.g. Planck, scales and that a sufficiently advanced civilization might be able to enlarge them to classical size. The purpose of this paper is to explore the possibility that inflation... |
2211.04711 | Tao Zhu | Tao Zhu, Wen Zhao, and Anzhong Wang | Gravitational wave constraints on spatial covariant gravities | 14 pages, 2 figures, and 4 tables. arXiv admin note: text overlap
with arXiv:2210.05259; v2: version to appear in PRD | Phys. Rev. D 107, 044051 (2023) | 10.1103/PhysRevD.107.044051 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | The direct discovery of gravitational waves (GWs) from the coalescence of
compact binary components by the LIGO/Virgo/KAGRA Collaboration provides an
unprecedented opportunity for exploring the underlying theory of gravity that
drives the coalescence process in the strong and highly dynamical field regime
of gravity.... | [
{
"created": "Wed, 9 Nov 2022 07:05:52 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Feb 2023 16:29:21 GMT",
"version": "v2"
}
] | 2023-02-22 | [
[
"Zhu",
"Tao",
""
],
[
"Zhao",
"Wen",
""
],
[
"Wang",
"Anzhong",
""
]
] | The direct discovery of gravitational waves (GWs) from the coalescence of compact binary components by the LIGO/Virgo/KAGRA Collaboration provides an unprecedented opportunity for exploring the underlying theory of gravity that drives the coalescence process in the strong and highly dynamical field regime of gravity. I... |
1104.2814 | Lorenzo Sebastiani | Guido Cognola, Olesya Gorbunova, Lorenzo Sebastiani and Sergio Zerbini | On the Energy Issue for a Class of Modified Higher Order Gravity Black
Hole Solutions | 15 pages, published version | Phys.Rev.D84:023515,2011 | 10.1103/PhysRevD.84.023515 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the case of a large class of static spherically symmetric black hole
solutions in higher order modified gravity models, an expression for the
associated energy is proposed and identified as a quantity proportional to the
constant of integration, which appears in the explicit solution. The
identification is achieve... | [
{
"created": "Thu, 14 Apr 2011 16:06:40 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Jun 2011 12:53:02 GMT",
"version": "v2"
}
] | 2011-08-08 | [
[
"Cognola",
"Guido",
""
],
[
"Gorbunova",
"Olesya",
""
],
[
"Sebastiani",
"Lorenzo",
""
],
[
"Zerbini",
"Sergio",
""
]
] | In the case of a large class of static spherically symmetric black hole solutions in higher order modified gravity models, an expression for the associated energy is proposed and identified as a quantity proportional to the constant of integration, which appears in the explicit solution. The identification is achieved ... |
0808.0179 | Saeed Mirshekari | Saeed Mirshekari, Amir M. Abbassi | Energy-momentum Prescriptions in General Spherically Symmetric
Space-times | LaTeX, 7 pages: added references | Mod. Phys. Lett. A24: 747-758, 2009 | 10.1142/S0217732309028679 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein, Landau-Lifshitz, Papapetrou, Weinberg, and M{\o}ller
energy-momentum prescriptions in general spherically symmetric space-times are
investigated. It is shown that for two special but not unusual classes of
general spherically symmetric space-times several energy-momentum prescriptions
in Schwarzschild Carte... | [
{
"created": "Fri, 1 Aug 2008 19:30:52 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Nov 2014 14:11:49 GMT",
"version": "v2"
}
] | 2014-12-02 | [
[
"Mirshekari",
"Saeed",
""
],
[
"Abbassi",
"Amir M.",
""
]
] | Einstein, Landau-Lifshitz, Papapetrou, Weinberg, and M{\o}ller energy-momentum prescriptions in general spherically symmetric space-times are investigated. It is shown that for two special but not unusual classes of general spherically symmetric space-times several energy-momentum prescriptions in Schwarzschild Cartesi... |
1504.01660 | Mohammad Reza Setare | M. R. Setare, H. Adami | Black hole conserved charges in Generalized Minimal Massive Gravity | 11 pages, accepted for publication in PLB. arXiv admin note: text
overlap with arXiv:1412.2151 | null | 10.1016/j.physletb.2015.04.004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we construct mass, angular momentum and entropy of black hole
solution of Generalized Minimal Massive Gravity (GMMG) in asymptotically
Anti-de Sitter (AdS) spacetimes. The generalized minimal massive gravity theory
is realized by adding the CS deformation term, the higher derivative
deformation term, an... | [
{
"created": "Mon, 6 Apr 2015 05:04:40 GMT",
"version": "v1"
}
] | 2015-06-24 | [
[
"Setare",
"M. R.",
""
],
[
"Adami",
"H.",
""
]
] | In this paper we construct mass, angular momentum and entropy of black hole solution of Generalized Minimal Massive Gravity (GMMG) in asymptotically Anti-de Sitter (AdS) spacetimes. The generalized minimal massive gravity theory is realized by adding the CS deformation term, the higher derivative deformation term, and ... |
1501.04319 | Carlos A. R. Herdeiro | Carlos Herdeiro, Eugen Radu | Construction and physical properties of Kerr black holes with scalar
hair | 45 pages, 20 Figures; Invited contribution to the Focus Issue on
"Black holes and fundamental fields" to appear in Classical and Quantum
Gravity; Data files for some reference solutions described in the paper can
be found at this URL: http://gravitation.web.ua.pt/index.php?q=node/416; v2.
typos corrected, minor... | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Kerr black holes with scalar hair are solutions of the Einstein-Klein-Gordon
field equations describing regular (on and outside an event horizon),
asymptotically flat black holes with scalar hair (arXiv:1403.2757). These black
holes interpolate continuously between the Kerr solution and rotating boson
stars in D=4 sp... | [
{
"created": "Sun, 18 Jan 2015 15:36:13 GMT",
"version": "v1"
},
{
"created": "Mon, 4 May 2015 12:59:09 GMT",
"version": "v2"
}
] | 2015-05-05 | [
[
"Herdeiro",
"Carlos",
""
],
[
"Radu",
"Eugen",
""
]
] | Kerr black holes with scalar hair are solutions of the Einstein-Klein-Gordon field equations describing regular (on and outside an event horizon), asymptotically flat black holes with scalar hair (arXiv:1403.2757). These black holes interpolate continuously between the Kerr solution and rotating boson stars in D=4 spac... |
gr-qc/0512150 | Emanuel Gallo | Alfredo E. Dominguez, Emanuel Gallo | Radiating black hole solutions in Einstein-Gauss-Bonnet gravity | null | Phys.Rev. D73 (2006) 064018 | 10.1103/PhysRevD.73.064018 | null | gr-qc | null | In this paper, we find some new exact solutions to the Einstein-Gauss-Bonnet
equations. First, we prove a theorem which allows us to find a large family of
solutions to the Einstein-Gauss-Bonnet gravity in $n$-dimensions. This family
of solutions represents dynamic black holes and contains, as particular cases,
not o... | [
{
"created": "Sat, 24 Dec 2005 23:41:12 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jan 2006 20:34:27 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Apr 2006 19:42:35 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Dominguez",
"Alfredo E.",
""
],
[
"Gallo",
"Emanuel",
""
]
] | In this paper, we find some new exact solutions to the Einstein-Gauss-Bonnet equations. First, we prove a theorem which allows us to find a large family of solutions to the Einstein-Gauss-Bonnet gravity in $n$-dimensions. This family of solutions represents dynamic black holes and contains, as particular cases, not onl... |
2403.08864 | Nikolas Wittek | Nikolas A. Wittek, Adam Pound, Harald P. Pfeiffer, Leor Barack | Worldtube excision method for intermediate-mass-ratio inspirals:
self-consistent evolution in a scalar-charge model | 20 pages, 15 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is a third installment in a program to develop a method for alleviating
the scale disparity in binary black hole simulations with mass ratios in the
intermediate astrophysical range, where simulation cost is prohibitive while
purely perturbative methods may not be adequate. The method is based on
excising a "wor... | [
{
"created": "Wed, 13 Mar 2024 18:00:02 GMT",
"version": "v1"
}
] | 2024-03-15 | [
[
"Wittek",
"Nikolas A.",
""
],
[
"Pound",
"Adam",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Barack",
"Leor",
""
]
] | This is a third installment in a program to develop a method for alleviating the scale disparity in binary black hole simulations with mass ratios in the intermediate astrophysical range, where simulation cost is prohibitive while purely perturbative methods may not be adequate. The method is based on excising a "world... |
1607.04396 | Taeyoon Moon | Taeyoon Moon and Phillial Oh | Spontaneous symmetry breaking in 5D conformally invariant gravity | 1+12 pages, 1 figure, accepted for publication in Adv.High Energy
physics | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the possibility of the spontaneous symmetry breaking in 5D
conformally invariant gravity, whose action consists of a scalar field
nonminimally coupled to the curvature with its potential. Performing
dimensional reduction via ADM decomposition, we find that the model allows an
exact solution giving rise to ... | [
{
"created": "Fri, 15 Jul 2016 07:18:53 GMT",
"version": "v1"
}
] | 2016-07-18 | [
[
"Moon",
"Taeyoon",
""
],
[
"Oh",
"Phillial",
""
]
] | We explore the possibility of the spontaneous symmetry breaking in 5D conformally invariant gravity, whose action consists of a scalar field nonminimally coupled to the curvature with its potential. Performing dimensional reduction via ADM decomposition, we find that the model allows an exact solution giving rise to th... |
1609.07659 | Farhad Darabi | F. Gholami, F. Darabi, A. Haji-Badali | Multiply-warped product metrics and reduction of Einstein equations | 12 pages, Reference updated | International Journal of Geometric Methods in Modern Physics, Vol.
14, 1750021 (2017) | 10.1142/S0219887817500219 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that for every multidimensional metric in the multiply warped
product form $\bar{M} = K\times_{f_1} M_1\times_{f_2}M_2$ with warp functions
$f_1$, $f_2$, associated to the submanifolds $M_1$, $M_2$ of dimensions $n_1$,
$n_2$ respectively, one can find the corresponding Einstein equations
$\bar{G}_{AB}=-\b... | [
{
"created": "Sat, 24 Sep 2016 19:15:15 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Oct 2016 06:46:26 GMT",
"version": "v2"
}
] | 2016-10-20 | [
[
"Gholami",
"F.",
""
],
[
"Darabi",
"F.",
""
],
[
"Haji-Badali",
"A.",
""
]
] | It is shown that for every multidimensional metric in the multiply warped product form $\bar{M} = K\times_{f_1} M_1\times_{f_2}M_2$ with warp functions $f_1$, $f_2$, associated to the submanifolds $M_1$, $M_2$ of dimensions $n_1$, $n_2$ respectively, one can find the corresponding Einstein equations $\bar{G}_{AB}=-\bar... |
gr-qc/9803001 | G. Haager | Gernot Haager (Institute of Theoretical Physics,
Friedrich-Schiller-University, Jena, Germany), Marc Mars (School of
Mathematical Sciences, Queen Mary and Westfield College, London, U.K.) | A self-similar inhomogeneous dust cosmology | 17 pages, 3 postscript figures, uses psfig,sty, accepted for
publication in Class. Quantum Grav | Class.Quant.Grav. 15 (1998) 1567-1580 | 10.1088/0264-9381/15/6/013 | null | gr-qc | null | A detailed study of an inhomogeneous dust cosmology contained in a
$\gamma$-law family of perfect-fluid metrics recently presented by Mars and
Senovilla is performed. The metric is shown to be the most general orthogonally
transitive, Abelian, $G_2$ on $S_2$ solution admitting an additional homothety
such that the se... | [
{
"created": "Sat, 28 Feb 1998 16:00:18 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Haager",
"Gernot",
"",
"Institute of Theoretical Physics,\n Friedrich-Schiller-University, Jena, Germany"
],
[
"Mars",
"Marc",
"",
"School of\n Mathematical Sciences, Queen Mary and Westfield College, London, U.K."
]
] | A detailed study of an inhomogeneous dust cosmology contained in a $\gamma$-law family of perfect-fluid metrics recently presented by Mars and Senovilla is performed. The metric is shown to be the most general orthogonally transitive, Abelian, $G_2$ on $S_2$ solution admitting an additional homothety such that the self... |
2101.11933 | Gerardo Garc\'ia-Moreno | Julio Arrechea, Carlos Barcel\'o, Luis J. Garay, Gerardo
Garc\'ia-Moreno | Inversion of statistics and thermalization in the Unruh effect | 9 pages, no figures; v2: Minor changes introduced in the text to
match the published version | Phys. Rev. D 104, 065004 (2021) | 10.1103/PhysRevD.104.065004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a master equation for the reduced density matrix of a uniformly
accelerating quantum detector in arbitrary dimensions, generically coupled to a
field initially in its vacuum state, and analyze its late time regime. We find
that such density matrix asymptotically reaches a Gibbs state. The
particularities of... | [
{
"created": "Thu, 28 Jan 2021 11:13:21 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Sep 2021 14:25:14 GMT",
"version": "v2"
}
] | 2021-09-06 | [
[
"Arrechea",
"Julio",
""
],
[
"Barceló",
"Carlos",
""
],
[
"Garay",
"Luis J.",
""
],
[
"García-Moreno",
"Gerardo",
""
]
] | We derive a master equation for the reduced density matrix of a uniformly accelerating quantum detector in arbitrary dimensions, generically coupled to a field initially in its vacuum state, and analyze its late time regime. We find that such density matrix asymptotically reaches a Gibbs state. The particularities of i... |
gr-qc/0411118 | B. V. Ivanov | Boyko V. Ivanov | No news for Kerr-Schild fields | 4 pages, Revtex4 | Phys.Rev. D71 (2005) 044012 | 10.1103/PhysRevD.71.044012 | null | gr-qc astro-ph | null | Algebraically special fields with no gravitational radiation are described.
Kerr-Schild fields, which include as a concrete case the Kinnersley photon
rocket, form an important subclass of them.
| [
{
"created": "Thu, 25 Nov 2004 07:53:58 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Ivanov",
"Boyko V.",
""
]
] | Algebraically special fields with no gravitational radiation are described. Kerr-Schild fields, which include as a concrete case the Kinnersley photon rocket, form an important subclass of them. |
1608.00296 | Alexander Kegeles | Alexander Kegeles, Daniele Oriti | Continuous point symmetries in Group Field Theories | null | null | 10.1088/1751-8121/aa5c14 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the notion of symmetries in non-local field theories characterized
by integro-differential equations of motion, from a geometric perspective. We
then focus on Group Field Theory (GFT) models of quantum gravity and provide a
general analysis of their continuous point symmetry transformations, including
the ... | [
{
"created": "Mon, 1 Aug 2016 02:05:57 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Aug 2016 10:00:27 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Feb 2017 14:45:56 GMT",
"version": "v3"
}
] | 2017-04-05 | [
[
"Kegeles",
"Alexander",
""
],
[
"Oriti",
"Daniele",
""
]
] | We discuss the notion of symmetries in non-local field theories characterized by integro-differential equations of motion, from a geometric perspective. We then focus on Group Field Theory (GFT) models of quantum gravity and provide a general analysis of their continuous point symmetry transformations, including the ge... |
1410.5071 | Houwen Wu | Deyou Chen, Houwen Wu, Haitang Yang, Shuzheng Yang | Effects of quantum gravity on black holes | Invited review for Int. J. Mod. Phys. A, 48 pages | Int. J. Mod. Phys. A 29, 1430054 (2014) | 10.1142/S0217751X14300543 | CTP-SCU/2014006, CAS-KITPC/ITP-444 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this review, we discuss effects of quantum gravity on black hole physics.
After a brief review of the origin of the minimal observable length from
various quantum gravity theories, we present the tunneling method. To
incorporate quantum gravity effects, we modify the Klein-Gordon equation and
Dirac equation by the... | [
{
"created": "Sun, 19 Oct 2014 13:26:03 GMT",
"version": "v1"
}
] | 2014-10-21 | [
[
"Chen",
"Deyou",
""
],
[
"Wu",
"Houwen",
""
],
[
"Yang",
"Haitang",
""
],
[
"Yang",
"Shuzheng",
""
]
] | In this review, we discuss effects of quantum gravity on black hole physics. After a brief review of the origin of the minimal observable length from various quantum gravity theories, we present the tunneling method. To incorporate quantum gravity effects, we modify the Klein-Gordon equation and Dirac equation by the m... |
gr-qc/0510091 | Christian Pierre | Christian Pierre | A new track for unifying general relativity with quantum field theories | null | null | null | null | gr-qc | null | In the perspective of unifying quantum field theories with general
relativity,the equations of the internal dynamics of the vacuum and mass
structures of a set of interacting particles are proved to be in one-to-one
correspondence with the equations of general relativity. This leads us to
envisage a high value for th... | [
{
"created": "Wed, 19 Oct 2005 21:03:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pierre",
"Christian",
""
]
] | In the perspective of unifying quantum field theories with general relativity,the equations of the internal dynamics of the vacuum and mass structures of a set of interacting particles are proved to be in one-to-one correspondence with the equations of general relativity. This leads us to envisage a high value for the ... |
gr-qc/0005040 | Martin Tajmar | C.J. de Matos, M. Tajmar | Advance of Mercury Perihelion Explained by Cogravity | 13 pages | null | 10.1142/9789812810021_0036 | null | gr-qc | null | The theory of General Relativity explaines the advance of Mercury perihelion
using space curvature and the Schwartzschild metric. We demonstrate that this
phenomena can also be interpreted due to the cogravitational field produced by
the apparent motion of the Sun around Mercury giving exactly the same estimate
as de... | [
{
"created": "Thu, 11 May 2000 15:34:49 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"de Matos",
"C. J.",
""
],
[
"Tajmar",
"M.",
""
]
] | The theory of General Relativity explaines the advance of Mercury perihelion using space curvature and the Schwartzschild metric. We demonstrate that this phenomena can also be interpreted due to the cogravitational field produced by the apparent motion of the Sun around Mercury giving exactly the same estimate as deri... |
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