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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9904050 | Siming Liu | Yunqiang Yu and Siming Liu | Relativistic Charged Balls | revtex, 11 pages | null | 10.1088/0253-6102/33/4/571 | null | gr-qc | null | It is proven that the relativistic charged ball with its charge less than its
mass (in natural units) cannot have a non-singular static configuration while
its radius approaches its external horizon size. This conclusion does not
depend on the details of charge distribution and the equation of state. The
involved ass... | [
{
"created": "Tue, 20 Apr 1999 14:07:55 GMT",
"version": "v1"
}
] | 2018-01-17 | [
[
"Yu",
"Yunqiang",
""
],
[
"Liu",
"Siming",
""
]
] | It is proven that the relativistic charged ball with its charge less than its mass (in natural units) cannot have a non-singular static configuration while its radius approaches its external horizon size. This conclusion does not depend on the details of charge distribution and the equation of state. The involved assum... |
1211.3612 | Cl\'audio Nassif Cruz | Cl\'audio Nassif | Doubly Special Relativity with a minimum speed and the search for a
quantum gravity at low energies | 11 pages and 4 figures. Accepted for publication in Int. Journal of
Modern Physics D. arXiv admin note: substantial text overlap with
arXiv:0805.1201, arXiv:0711.4897 | International Journal of Modern Physics D Vol.19, No.5, p.539
(2010) | 10.1142/S021827181001652X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This research aims to consider a new principle of symmetry in the space-time
by means of the elimination of the classical idea of rest including a universal
minimum limit of speed in the subatomic world. Such a limit, unattainable by
the particles, represents a preferred inertial reference frame associated with
a cos... | [
{
"created": "Thu, 15 Nov 2012 14:15:21 GMT",
"version": "v1"
}
] | 2012-11-28 | [
[
"Nassif",
"Cláudio",
""
]
] | This research aims to consider a new principle of symmetry in the space-time by means of the elimination of the classical idea of rest including a universal minimum limit of speed in the subatomic world. Such a limit, unattainable by the particles, represents a preferred inertial reference frame associated with a cosmo... |
gr-qc/0203014 | Michele Vallisneri | Massimo Pauri and Michele Vallisneri | Ephemeral point-events: is there a last remnant of physical objectivity? | LaTeX, natbib, 34 pages. Final journal version | Dialogos 79, 263-303 (2002) | null | null | gr-qc | null | For the past two decades, Einstein's Hole Argument (which deals with the
apparent indeterminateness of general relativity due to the general covariance
of the field equations) and its resolution in terms of Leibniz equivalence (the
statement that Riemannian geometries related by active diffeomorphisms
represent the s... | [
{
"created": "Mon, 4 Mar 2002 23:42:18 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Apr 2002 17:47:52 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Apr 2002 15:59:50 GMT",
"version": "v3"
},
{
"created": "Wed, 16 Oct 2002 18:52:59 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Pauri",
"Massimo",
""
],
[
"Vallisneri",
"Michele",
""
]
] | For the past two decades, Einstein's Hole Argument (which deals with the apparent indeterminateness of general relativity due to the general covariance of the field equations) and its resolution in terms of Leibniz equivalence (the statement that Riemannian geometries related by active diffeomorphisms represent the sam... |
1701.06271 | Alexey Golovnev | Alexey Golovnev, Tomi Koivisto, Marit Sandstad | On the covariance of teleparallel gravity theories | 14 pages; final version accepted by CQG | Classical and Quantum Gravity 34 (2017) 145013 | 10.1088/1361-6382/aa7830 | NORDITA-2017-11 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The basics of teleparallel gravity and its extensions are reviewed with
particular emphasis on the problem of Lorentz-breaking choice of connection in
pure-tetrad versions of the theories. Various possible ways to covariantise
such models are discussed. A by-product is a new form of $f(T)$ field
equations.
| [
{
"created": "Mon, 23 Jan 2017 06:08:43 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Jan 2017 10:52:07 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Feb 2017 13:58:49 GMT",
"version": "v3"
},
{
"created": "Fri, 23 Jun 2017 10:36:08 GMT",
"version": "v4"
}
] | 2017-06-30 | [
[
"Golovnev",
"Alexey",
""
],
[
"Koivisto",
"Tomi",
""
],
[
"Sandstad",
"Marit",
""
]
] | The basics of teleparallel gravity and its extensions are reviewed with particular emphasis on the problem of Lorentz-breaking choice of connection in pure-tetrad versions of the theories. Various possible ways to covariantise such models are discussed. A by-product is a new form of $f(T)$ field equations. |
gr-qc/9409039 | Ahmed Hindawi | F. I. Mikhail, M. I. Wanas, E. I. Lashin, and Ahmed Hindawi | Spherically Symmetric Solutions in M\o ller's Tetrad Theory of
Gravitation | LaTeX2e with AMS-LaTeX 1.2, 8 pages | Gen.Rel.Grav.26:869-876,1994 | 10.1007/BF02107145 | null | gr-qc | null | The general solution of M\o ller's field equations in case of spherical
symmetry is derived. The previously obtained solutions are verified as special
cases of the general solution.
| [
{
"created": "Mon, 19 Sep 1994 15:58:03 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Feb 1995 18:50:09 GMT",
"version": "v2"
},
{
"created": "Tue, 14 Feb 1995 23:02:12 GMT",
"version": "v3"
},
{
"created": "Tue, 7 Nov 1995 21:12:14 GMT",
"version": "v4"
},
{
"cr... | 2008-11-26 | [
[
"Mikhail",
"F. I.",
""
],
[
"Wanas",
"M. I.",
""
],
[
"Lashin",
"E. I.",
""
],
[
"Hindawi",
"Ahmed",
""
]
] | The general solution of M\o ller's field equations in case of spherical symmetry is derived. The previously obtained solutions are verified as special cases of the general solution. |
2111.11995 | Roldao da Rocha | Roldao da Rocha | Gravitational decoupling of generalized Horndeski hybrid stars | 35 pages, 10 figures | Eur. Phys. J. C 82 (2022) 34 | 10.1140/epjc/s10052-021-09971-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational decoupled compact polytropic hybrid stars are here addressed in
generalized Horndeski scalar-tensor gravity. Additional physical properties of
hybrid stars are scrutinized and discussed in the gravitational decoupling
setup. The asymptotic value of the mass function, the compactness, and the
effective r... | [
{
"created": "Tue, 23 Nov 2021 16:51:30 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jan 2022 13:16:19 GMT",
"version": "v2"
}
] | 2022-01-14 | [
[
"da Rocha",
"Roldao",
""
]
] | Gravitational decoupled compact polytropic hybrid stars are here addressed in generalized Horndeski scalar-tensor gravity. Additional physical properties of hybrid stars are scrutinized and discussed in the gravitational decoupling setup. The asymptotic value of the mass function, the compactness, and the effective rad... |
gr-qc/9601031 | Andrew M. Abrahams | A.M. Abrahams and J.W. York, Jr | 3+1 General Relativity in Hyperbolic Form | 15 pages, latex, 2 figures | null | null | null | gr-qc | null | This paper focuses on the imposition of boundary conditions for numerical
relativity simulations of black holes. This issue is used to motivate the
discussion of a new hyperbolic formulation of 3+1 general relativity. The paper
will appear in the Proceedings of the Les Houches School on Astrophysical
Sources of Gravi... | [
{
"created": "Sat, 20 Jan 1996 22:15:56 GMT",
"version": "v1"
}
] | 2012-08-27 | [
[
"Abrahams",
"A. M.",
""
],
[
"York,",
"J. W.",
"Jr"
]
] | This paper focuses on the imposition of boundary conditions for numerical relativity simulations of black holes. This issue is used to motivate the discussion of a new hyperbolic formulation of 3+1 general relativity. The paper will appear in the Proceedings of the Les Houches School on Astrophysical Sources of Gravita... |
1611.04044 | Sina Bahrami | Sina Bahrami | Saturating The Bekenstein-Hawking Entropy Bound With Initial Data Sets
For Gravitational Collapse | null | Phys. Rev. D 95, 026006 (2017) | 10.1103/PhysRevD.95.026006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is possible to find initial states for gravitational collapse whose
entropy approximately saturates the Bekenstein-Hawking entropy of the final
black hole. The prototypical example of such a state is that envisaged by Zurek
and Thorne, and also by Susskind: for a black hole of mass $\sim M$ , a number
$\sim M^2$ o... | [
{
"created": "Sat, 12 Nov 2016 21:25:31 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Dec 2016 03:03:50 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Feb 2017 02:30:57 GMT",
"version": "v3"
}
] | 2017-02-08 | [
[
"Bahrami",
"Sina",
""
]
] | It is possible to find initial states for gravitational collapse whose entropy approximately saturates the Bekenstein-Hawking entropy of the final black hole. The prototypical example of such a state is that envisaged by Zurek and Thorne, and also by Susskind: for a black hole of mass $\sim M$ , a number $\sim M^2$ of ... |
2112.00311 | Hideki Asada | Keita Takizawa, Hideki Asada | Gravitational lens on de-Sitter background | 12 pages, 8 figures, typos corrected, 2 references added, accepted
for PRD | Phys. Rev. D 105, 084022 (2022) | 10.1103/PhysRevD.105.084022 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | Gravitational lenses are examined in de-Sitter (dS) background, for which the
existence of the dS horizon is taken into account and hyperbolic trigonometry
is used together with the hyperbolic angular diameter distance. Spherical
trigonometry is used to discuss a gravitational lens in anti-de Sitter (AdS)
background.... | [
{
"created": "Wed, 1 Dec 2021 07:08:34 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Mar 2022 00:14:02 GMT",
"version": "v2"
}
] | 2022-06-08 | [
[
"Takizawa",
"Keita",
""
],
[
"Asada",
"Hideki",
""
]
] | Gravitational lenses are examined in de-Sitter (dS) background, for which the existence of the dS horizon is taken into account and hyperbolic trigonometry is used together with the hyperbolic angular diameter distance. Spherical trigonometry is used to discuss a gravitational lens in anti-de Sitter (AdS) background. T... |
2203.01919 | David Kubiznak | David Kubiznak, Tayebeh Tahamtan, Otakar Svitek | Slowly rotating black holes in nonlinear electrodynamics | 11 pages, no figures v3: slightly extended version, added references | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show how (at least in principle) one can construct electrically and
magnetically charged slowly rotating black hole solutions coupled to non-linear
electrodynamics (NLE). Our generalized Lense-Thirring ansatz is, apart from the
static metric function $f$ and the electrostatic potential $\phi$ inherited
from the co... | [
{
"created": "Thu, 3 Mar 2022 18:52:27 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Mar 2022 09:53:07 GMT",
"version": "v2"
},
{
"created": "Thu, 12 May 2022 10:05:34 GMT",
"version": "v3"
}
] | 2022-05-13 | [
[
"Kubiznak",
"David",
""
],
[
"Tahamtan",
"Tayebeh",
""
],
[
"Svitek",
"Otakar",
""
]
] | We show how (at least in principle) one can construct electrically and magnetically charged slowly rotating black hole solutions coupled to non-linear electrodynamics (NLE). Our generalized Lense-Thirring ansatz is, apart from the static metric function $f$ and the electrostatic potential $\phi$ inherited from the corr... |
2312.11433 | David McNutt | C. Brown, M. Gorban, W. Julius, R. Radhakrishnan, G. Cleaver, and D.
McNutt | Killing Invariants: An approach to the sub-classification of geometries
with symmetry | 11 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In principle, the local classification of spacetimes is always possible using
the Cartan-Karlhede algorithm. However, in practice, the process of determining
equivalence of two spacetimes is potentially computationally difficult or not
at all possible. This difficulty will arise whenever the classifying invariants
ar... | [
{
"created": "Mon, 18 Dec 2023 18:34:58 GMT",
"version": "v1"
}
] | 2023-12-19 | [
[
"Brown",
"C.",
""
],
[
"Gorban",
"M.",
""
],
[
"Julius",
"W.",
""
],
[
"Radhakrishnan",
"R.",
""
],
[
"Cleaver",
"G.",
""
],
[
"McNutt",
"D.",
""
]
] | In principle, the local classification of spacetimes is always possible using the Cartan-Karlhede algorithm. However, in practice, the process of determining equivalence of two spacetimes is potentially computationally difficult or not at all possible. This difficulty will arise whenever the classifying invariants are ... |
1904.12803 | Daniel Kabat | Lam Hui, Daniel Kabat, Xinyu Li, Luca Santoni, Sam S. C. Wong | Black Hole Hair from Scalar Dark Matter | 34 pages. v2: references added, link to animation fixed. v3: minor
changes, more references, version to appear in JCAP | null | 10.1088/1475-7516/2019/06/038 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that a black hole surrounded by scalar dark matter develops scalar
hair. This is the generalization of a phenomenon pointed out by Jacobson, that
a minimally coupled scalar with a non-trivial time dependence far away from the
black hole would endow the black hole with hair. In our case, the time
dependence ar... | [
{
"created": "Mon, 29 Apr 2019 16:33:34 GMT",
"version": "v1"
},
{
"created": "Wed, 8 May 2019 19:42:17 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Jun 2019 16:39:58 GMT",
"version": "v3"
}
] | 2019-06-26 | [
[
"Hui",
"Lam",
""
],
[
"Kabat",
"Daniel",
""
],
[
"Li",
"Xinyu",
""
],
[
"Santoni",
"Luca",
""
],
[
"Wong",
"Sam S. C.",
""
]
] | We show that a black hole surrounded by scalar dark matter develops scalar hair. This is the generalization of a phenomenon pointed out by Jacobson, that a minimally coupled scalar with a non-trivial time dependence far away from the black hole would endow the black hole with hair. In our case, the time dependence aris... |
1807.01995 | Alessandro Casalino | Alessandro Casalino and Massimiliano Rinaldi | Testing Horndeski gravity as dark matter with $\texttt{hi_class}$ | 23 pages, 18 figures. References added, minor corrections, version
accepted for publication in Physics of The Dark Universe | Physics of the Dark Universe 23 (2019) 100243 | 10.1016/j.dark.2018.11.004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a model of dark matter fluid based on a sector of Horndeski
gravity. The model is very successful, at the background level, in reproducing
the evolution of the Universe from early times to today. However, at the
perturbative level the model fails. To show this, we use the code
$\texttt{hi_class}$ and we c... | [
{
"created": "Wed, 4 Jul 2018 09:16:21 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Jul 2018 11:09:31 GMT",
"version": "v2"
},
{
"created": "Sun, 11 Nov 2018 18:41:31 GMT",
"version": "v3"
}
] | 2019-01-10 | [
[
"Casalino",
"Alessandro",
""
],
[
"Rinaldi",
"Massimiliano",
""
]
] | We consider a model of dark matter fluid based on a sector of Horndeski gravity. The model is very successful, at the background level, in reproducing the evolution of the Universe from early times to today. However, at the perturbative level the model fails. To show this, we use the code $\texttt{hi_class}$ and we com... |
1710.04660 | Ivica Smoli\'c | Luka Gulin, Ivica Smoli\'c | Generalizations of the Smarr formula for black holes with nonlinear
electromagnetic fields | 20 pages, v3: slightly revised, published version | Class. Quantum Grav. 35 (2018) 025015 | 10.1088/1361-6382/aa9dfd | ZTF-EP-17-09 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a direct, geometric derivation of the generalized Smarr formula
for the stationary axially symmetric black holes with nonlinear electromagnetic
fields. The additional term is proven to be proportional to the integral of the
trace of the electromagnetic energy-momentum tensor and can be written as a
product... | [
{
"created": "Thu, 12 Oct 2017 18:00:00 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Oct 2017 18:00:06 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Jan 2018 19:22:44 GMT",
"version": "v3"
}
] | 2018-01-08 | [
[
"Gulin",
"Luka",
""
],
[
"Smolić",
"Ivica",
""
]
] | We present a direct, geometric derivation of the generalized Smarr formula for the stationary axially symmetric black holes with nonlinear electromagnetic fields. The additional term is proven to be proportional to the integral of the trace of the electromagnetic energy-momentum tensor and can be written as a product o... |
0809.4113 | Eduardo D\'iaz-Miguel | Eduardo D\'iaz-Miguel | The local deflection of light | 4 latex pages, 1 eps figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have derived the relationship between the radial proper distance, h, and
the polar angle, phi, for a light ray that is emitted and travels in the
neighborhood of the Earth's surface. General relativity predicts that, even
locally, the equation which relates these two physical magnitudes differs from
the one stated... | [
{
"created": "Wed, 24 Sep 2008 07:44:23 GMT",
"version": "v1"
}
] | 2008-09-25 | [
[
"Díaz-Miguel",
"Eduardo",
""
]
] | We have derived the relationship between the radial proper distance, h, and the polar angle, phi, for a light ray that is emitted and travels in the neighborhood of the Earth's surface. General relativity predicts that, even locally, the equation which relates these two physical magnitudes differs from the one stated b... |
1311.3912 | Stanley P. Gudder | Stan Gudder | A covariant causal set approach to discrete quantum gravity | 23 pages, 6 tables; new version corrects some typos in the proof of
Theorem 6.1 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A covariant causal set (c-causet) is a causal set that is invariant under
labeling. Such causets are well-behaved and have a rigid geometry that is
determined by a sequence of positive integers called the shell sequence. We
first consider the microscopic picture. In this picture, the vertices of a
c-causet have integ... | [
{
"created": "Fri, 15 Nov 2013 16:34:24 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Nov 2013 00:49:00 GMT",
"version": "v2"
}
] | 2013-11-26 | [
[
"Gudder",
"Stan",
""
]
] | A covariant causal set (c-causet) is a causal set that is invariant under labeling. Such causets are well-behaved and have a rigid geometry that is determined by a sequence of positive integers called the shell sequence. We first consider the microscopic picture. In this picture, the vertices of a c-causet have integer... |
2007.10601 | Rodrigo Lipparelli Fernandez | Rodrigo L. Fernandez | Cosmic Censorship Conjecture violation: A semiclassical approach | 80 pages, 25 figures, accepted PhD Thesis (Instituto de F\'isica,
UFRJ). Chapter 4 originated article published in arXiv:2007.06766 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Cosmic Censorship Conjecture (CCC) states that every singularity (except
the cosmological one) must appear "dressed" in the universe. This statement was
introduced by Roger Penrose (Penrose, 1969), meaning that every singularity
(except the Big Bang) in the universe must be hidden inside an Event Horizon.
Mathema... | [
{
"created": "Tue, 21 Jul 2020 05:07:41 GMT",
"version": "v1"
}
] | 2020-07-22 | [
[
"Fernandez",
"Rodrigo L.",
""
]
] | The Cosmic Censorship Conjecture (CCC) states that every singularity (except the cosmological one) must appear "dressed" in the universe. This statement was introduced by Roger Penrose (Penrose, 1969), meaning that every singularity (except the Big Bang) in the universe must be hidden inside an Event Horizon. Mathemati... |
gr-qc/9504019 | Bill Hiscock | Paul R. Anderson (Wake Forest University), William A. Hiscock and
Daniel J. Loranz (Montana State University) | Semiclassical Stability of the Extreme Reissner-Nordstrom Black Hole | 10 pages, REVTeX, 4 figures in separate uuencoded compressed file | Phys.Rev.Lett.74:4365-4368,1995 | 10.1103/PhysRevLett.74.4365 | null | gr-qc hep-th | null | The stress-energy tensor of a free quantized scalar field is calculated in
the extreme Reissner-Nordstr\"{o}m black hole spacetime in the zero temperature
vacuum state. The stress-energy appears to be regular on the event horizon,
contrary to the suggestion provided by two-dimensional calculations. An
analytic calcul... | [
{
"created": "Thu, 13 Apr 1995 19:43:49 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Anderson",
"Paul R.",
"",
"Wake Forest University"
],
[
"Hiscock",
"William A.",
"",
"Montana State University"
],
[
"Loranz",
"Daniel J.",
"",
"Montana State University"
]
] | The stress-energy tensor of a free quantized scalar field is calculated in the extreme Reissner-Nordstr\"{o}m black hole spacetime in the zero temperature vacuum state. The stress-energy appears to be regular on the event horizon, contrary to the suggestion provided by two-dimensional calculations. An analytic calculat... |
gr-qc/9507028 | Don N. Page | Don N. Page (University of Alberta, Edmonton, Canada) | Quantum Cosmology Lectures | LaTeX, 18 pages, lectures at the First Mexican School on Gravitation
and Mathematical Physics, December 12-16, 1994 | null | null | Alberta-Thy-15-95 | gr-qc | null | Quantum cosmology is the quantum theory of the entire universe. Although
strange at first sight, it is appropriate because (1) our world appears to be
fundamentally quantum, (2) the classical description of gravity breaks down at
singularities it would give at the beginning of the universe, and (3) our
universe has m... | [
{
"created": "Fri, 14 Jul 1995 00:26:36 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Page",
"Don N.",
"",
"University of Alberta, Edmonton, Canada"
]
] | Quantum cosmology is the quantum theory of the entire universe. Although strange at first sight, it is appropriate because (1) our world appears to be fundamentally quantum, (2) the classical description of gravity breaks down at singularities it would give at the beginning of the universe, and (3) our universe has man... |
0707.1122 | Rituparno Goswami | Rituparno Goswami | Gravitational collapse of dustlike matter with heat flux | 5 pages, Revtex4, 2 figures | null | null | null | gr-qc astro-ph hep-th | null | We present a new class of solutions to Einstein equations for the spherical
collapse of dustlike matter coupled with heat flux. In this family of solutions
spacetime shear is necessarily non-zero. Also these solutions have an
interesting property that there is always a bounce before the singularity,
which is caused e... | [
{
"created": "Mon, 9 Jul 2007 19:37:52 GMT",
"version": "v1"
}
] | 2007-07-11 | [
[
"Goswami",
"Rituparno",
""
]
] | We present a new class of solutions to Einstein equations for the spherical collapse of dustlike matter coupled with heat flux. In this family of solutions spacetime shear is necessarily non-zero. Also these solutions have an interesting property that there is always a bounce before the singularity, which is caused ent... |
1610.05299 | Alessia Platania | Alfio Bonanno, Benjamin Koch, Alessia Platania | Cosmic Censorship in Quantum Einstein Gravity | 10 pages, 6 figures; v3: version accepted for publication in CQG | null | 10.1088/1361-6382/aa6788 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the quantum gravity modification of the Kuroda-Papapetrou model
induced by the running of the Newton's constant at high energy in Quantum
Einstein Gravity. We argue that although the antiscreening character of the
gravitational interaction favours the formation of a naked singularity, quantum
gravity effects... | [
{
"created": "Mon, 17 Oct 2016 20:00:00 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Mar 2017 19:00:00 GMT",
"version": "v2"
},
{
"created": "Fri, 7 Apr 2017 18:00:00 GMT",
"version": "v3"
}
] | 2017-04-11 | [
[
"Bonanno",
"Alfio",
""
],
[
"Koch",
"Benjamin",
""
],
[
"Platania",
"Alessia",
""
]
] | We study the quantum gravity modification of the Kuroda-Papapetrou model induced by the running of the Newton's constant at high energy in Quantum Einstein Gravity. We argue that although the antiscreening character of the gravitational interaction favours the formation of a naked singularity, quantum gravity effects t... |
1312.5843 | Masahiro Shimano | Masahiro Shimano and Umpei Miyamoto | Naked singularity explosion in higher-dimensional dust collapse | 21 pages, 4 figures, accepted for publication in CQG | null | 10.1088/0264-9381/31/4/045002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of the large extra dimensions or TeV-scale gravity, it has
been argued that an effective naked singularity, called the visible border of
spacetime, would be generated by high-energy particle collisions. Motivated by
this interesting possibility, we investigate a particle creation by a naked
singularity... | [
{
"created": "Fri, 20 Dec 2013 08:14:35 GMT",
"version": "v1"
}
] | 2015-06-18 | [
[
"Shimano",
"Masahiro",
""
],
[
"Miyamoto",
"Umpei",
""
]
] | In the context of the large extra dimensions or TeV-scale gravity, it has been argued that an effective naked singularity, called the visible border of spacetime, would be generated by high-energy particle collisions. Motivated by this interesting possibility, we investigate a particle creation by a naked singularity i... |
2405.07313 | Wenbin Lin | Yiknag Xiao, Wenbin Lin | Scattering cross section of the long gravitino wave in Schwarzschild
spacetime | 10 pages | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The scattering problem of the gravitino wave in Schwarzschild spacetime is
explored. We employ the perturbative method to calculate the differential
scattering cross section in the long wavelength limit, and demonstrate that it
satisfies the same rule of the spin dependance as those of the scalar,
neutrino, electroma... | [
{
"created": "Sun, 12 May 2024 15:48:12 GMT",
"version": "v1"
}
] | 2024-05-14 | [
[
"Xiao",
"Yiknag",
""
],
[
"Lin",
"Wenbin",
""
]
] | The scattering problem of the gravitino wave in Schwarzschild spacetime is explored. We employ the perturbative method to calculate the differential scattering cross section in the long wavelength limit, and demonstrate that it satisfies the same rule of the spin dependance as those of the scalar, neutrino, electromagn... |
gr-qc/9807070 | Nikolaos Mavromatos | Nick E. Mavromatos and Richard J. Szabo | Spacetime Quantization from Non-abelian D-particle Dynamics | 8 pages LATEX, one eps figure incorporated | Phys.Rev. D59 (1999) 064016 | 10.1103/PhysRevD.59.064016 | OUTP-98-56P | gr-qc hep-th | null | We describe the short-distance properties of the spacetime of a system of
D-particles by viewing their matrix-valued coordinates as coupling constants of
a deformed worldsheet $\sigma$-model. We show that the Zamolodchikov metric on
the associated moduli space naturally encodes properties of the non-abelian
dynamics,... | [
{
"created": "Sat, 25 Jul 1998 15:39:59 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Mavromatos",
"Nick E.",
""
],
[
"Szabo",
"Richard J.",
""
]
] | We describe the short-distance properties of the spacetime of a system of D-particles by viewing their matrix-valued coordinates as coupling constants of a deformed worldsheet $\sigma$-model. We show that the Zamolodchikov metric on the associated moduli space naturally encodes properties of the non-abelian dynamics, a... |
1706.07658 | George Pappas Dr | Kostas Glampedakis, George Pappas, Hector O. Silva, Emanuele Berti | Post-Kerr black hole spectroscopy | null | Phys. Rev. D 96, 064054 (2017) | 10.1103/PhysRevD.96.064054 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the central goals of the newborn field of gravitational wave astronomy
is to test gravity in the highly nonlinear, strong field regime characterizing
the spacetime of black holes. In particular, "black hole spectroscopy" (the
observation and identification of black hole quasinormal mode frequencies in
the grav... | [
{
"created": "Fri, 23 Jun 2017 12:17:31 GMT",
"version": "v1"
}
] | 2017-10-04 | [
[
"Glampedakis",
"Kostas",
""
],
[
"Pappas",
"George",
""
],
[
"Silva",
"Hector O.",
""
],
[
"Berti",
"Emanuele",
""
]
] | One of the central goals of the newborn field of gravitational wave astronomy is to test gravity in the highly nonlinear, strong field regime characterizing the spacetime of black holes. In particular, "black hole spectroscopy" (the observation and identification of black hole quasinormal mode frequencies in the gravit... |
1907.08714 | Fulvio Sbis\`a | Fulvio Sbis\`a, Pedro O. Baqui, Tays Miranda, Sergio E. Jor\'as and
Oliver F. Piattella | Neutron star masses in $R^{2}$-gravity | 26 pages, 15 figures, pdfLatex, one subsection added and other minor
changes, version accepted for publication | Physics of the Dark Universe 27C (2020) 100411 | 10.1016/j.dark.2019.100411 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We address the issue of the existence of inequivalent definitions of
gravitational mass in $R^{2}$-gravity. We present several definitions of
gravitational mass, and discuss the formal relations between them. We then
consider the concrete case of a static and spherically symmetric neutron star,
and solve numerically ... | [
{
"created": "Fri, 19 Jul 2019 22:31:46 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Nov 2019 17:57:26 GMT",
"version": "v2"
}
] | 2019-11-15 | [
[
"Sbisà",
"Fulvio",
""
],
[
"Baqui",
"Pedro O.",
""
],
[
"Miranda",
"Tays",
""
],
[
"Jorás",
"Sergio E.",
""
],
[
"Piattella",
"Oliver F.",
""
]
] | We address the issue of the existence of inequivalent definitions of gravitational mass in $R^{2}$-gravity. We present several definitions of gravitational mass, and discuss the formal relations between them. We then consider the concrete case of a static and spherically symmetric neutron star, and solve numerically th... |
0901.3191 | Mahmood Roshan | Mahmood Roshan, Maryam Nouri, Fatimah Shojai | Cosmological solutions of time varying speed of light theories | 16 pages, final version accepted for publication in Physics Letters B | Phys.Lett.B672:197-202,2009 | 10.1016/j.physletb.2009.01.042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider scalar-tensor theory for describing varying speed of light in a
spatially flat FRW space-time. We find some exact solutions in the metric and
Palatini formalisms. Also we examine the dynamics of this theory by dynamical
system method assuming a $\Lambda$CDM background and we find some exact
solutions by c... | [
{
"created": "Wed, 21 Jan 2009 06:01:00 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Feb 2009 19:09:50 GMT",
"version": "v2"
}
] | 2010-04-23 | [
[
"Roshan",
"Mahmood",
""
],
[
"Nouri",
"Maryam",
""
],
[
"Shojai",
"Fatimah",
""
]
] | We consider scalar-tensor theory for describing varying speed of light in a spatially flat FRW space-time. We find some exact solutions in the metric and Palatini formalisms. Also we examine the dynamics of this theory by dynamical system method assuming a $\Lambda$CDM background and we find some exact solutions by con... |
1805.04729 | Jerzy Matyjasek | Jerzy Matyjasek and Dariusz Tryniecki | Vacuum polarization of massive fields in the spacetime of the
higher-dimensional black holes | null | null | 10.5506/APhysPolB.49.1737 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct and study the vacuum polarization, $\langle
\phi^{2}\rangle_{D},$ of the quantized massive scalar field with a general
curvature coupling parameter in higher-dimensional static and
spherically-symmetric black hole spacetimes, with a special emphasis put on the
electrically charged Tangherlini solutions a... | [
{
"created": "Sat, 12 May 2018 14:57:11 GMT",
"version": "v1"
}
] | 2018-11-14 | [
[
"Matyjasek",
"Jerzy",
""
],
[
"Tryniecki",
"Dariusz",
""
]
] | We construct and study the vacuum polarization, $\langle \phi^{2}\rangle_{D},$ of the quantized massive scalar field with a general curvature coupling parameter in higher-dimensional static and spherically-symmetric black hole spacetimes, with a special emphasis put on the electrically charged Tangherlini solutions and... |
1311.0592 | Yong-Wan Kim | Yong-Wan Kim, Jaedong Choi, Young-Jai Park | Local free-fall Temperature of GMGHS Black Holes | 18 pages, 2 figures, version to appear in PRD | Phys. Rev. D 89, 044004 (2014) | 10.1103/PhysRevD.89.044004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain a (5+1)-dimensional global flat embedding of the
Gibbons-Maeda-Garfinkle-Horowitz-Strominger spacetime in Einstein frame, and a
(5+2)-dimensional global flat embedding in string frame. We show that the local
free-fall temperatures for freely falling observers in each frames are finite
at the event horizons,... | [
{
"created": "Mon, 4 Nov 2013 06:40:48 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jan 2014 01:20:23 GMT",
"version": "v2"
}
] | 2014-02-12 | [
[
"Kim",
"Yong-Wan",
""
],
[
"Choi",
"Jaedong",
""
],
[
"Park",
"Young-Jai",
""
]
] | We obtain a (5+1)-dimensional global flat embedding of the Gibbons-Maeda-Garfinkle-Horowitz-Strominger spacetime in Einstein frame, and a (5+2)-dimensional global flat embedding in string frame. We show that the local free-fall temperatures for freely falling observers in each frames are finite at the event horizons, w... |
2306.00062 | S. Q. Wu | Shuang-Qing Wu, Di Wu | Consistent mass formulas for higher even-dimensional
Reissner-Nordstr\"om-NUT-AdS spacetimes | 20 pages, revtex4-1.cls, match with the published version in PRD;
companion to 2209.01757 | Phys. Rev. D 108, 064035 (2023) | 10.1103/PhysRevD.108.064035 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In our previous work [D. Wu and S.-Q. Wu, Phys. Rev. D 108, 064034 (2023)],
we have formulated consistent thermodynamic first law and Bekenstein-Smarr mass
formulae for all higher even-dimensional uncharged Taub-NUT (AdS) spacetimes
through the inclusion of a secondary hair $J_n = Mn$ as did in the
four-dimensional N... | [
{
"created": "Wed, 31 May 2023 18:00:02 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Aug 2023 15:08:58 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Sep 2023 15:34:39 GMT",
"version": "v3"
}
] | 2023-09-19 | [
[
"Wu",
"Shuang-Qing",
""
],
[
"Wu",
"Di",
""
]
] | In our previous work [D. Wu and S.-Q. Wu, Phys. Rev. D 108, 064034 (2023)], we have formulated consistent thermodynamic first law and Bekenstein-Smarr mass formulae for all higher even-dimensional uncharged Taub-NUT (AdS) spacetimes through the inclusion of a secondary hair $J_n = Mn$ as did in the four-dimensional NUT... |
gr-qc/0609018 | Jos\'e Wadih Maluf | J. W. Maluf, S. C. Ulhoa, F. F. Faria and J. F. da Rocha-Neto | The angular momentum of the gravitational field and the Poincare group | 20 pages, no figures, accepted by Class. Quantum Gravity | Class.Quant.Grav. 23 (2006) 6245-6256 | 10.1088/0264-9381/23/22/011 | null | gr-qc | null | We redefine the gravitational angular momentum in the framework of the
teleparallel equivalent of general relativity. In similarity to the
gravitational energy-momentum, the new definition for the gravitational angular
momentum is coordinate independent. By considering the Poisson brackets in the
phase space of the t... | [
{
"created": "Wed, 6 Sep 2006 00:16:02 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Maluf",
"J. W.",
""
],
[
"Ulhoa",
"S. C.",
""
],
[
"Faria",
"F. F.",
""
],
[
"da Rocha-Neto",
"J. F.",
""
]
] | We redefine the gravitational angular momentum in the framework of the teleparallel equivalent of general relativity. In similarity to the gravitational energy-momentum, the new definition for the gravitational angular momentum is coordinate independent. By considering the Poisson brackets in the phase space of the the... |
2404.12811 | Felipe Agurto Sep\'ulveda Agurto-Sepulveda F | F. Agurto-Sep\'ulveda, J. Oliva, M. Oyarzo and D.R.G Schleicher | Black Hole shadows of $\alpha'$-corrected black holes | 14 pages, 8 figures. V2: small changes, references added, accepted in
PRD | null | null | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper we study the qualitative features induces by corrections to GR
coming from String Theory, on the shadows of rotating black holes. We deal with
the slowly rotating black hole solutions up to order $\mathcal{O}(a^3)$, to
first order in $\alpha'$, including also the dilaton. We provide a detailed
character... | [
{
"created": "Fri, 19 Apr 2024 11:48:29 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jun 2024 21:12:36 GMT",
"version": "v2"
}
] | 2024-06-26 | [
[
"Agurto-Sepúlveda",
"F.",
""
],
[
"Oliva",
"J.",
""
],
[
"Oyarzo",
"M.",
""
],
[
"Schleicher",
"D. R. G",
""
]
] | In this paper we study the qualitative features induces by corrections to GR coming from String Theory, on the shadows of rotating black holes. We deal with the slowly rotating black hole solutions up to order $\mathcal{O}(a^3)$, to first order in $\alpha'$, including also the dilaton. We provide a detailed characteriz... |
gr-qc/0409057 | Jorge Pullin | Rodolfo Gambini and Jorge Pullin | Consistent discretization and loop quantum geometry | 4 pages, Revtex, no figures | Phys.Rev.Lett. 94 (2005) 101302 | 10.1103/PhysRevLett.94.101302 | LSU-REL-091404 | gr-qc | null | We apply the ``consistent discretization'' approach to general relativity
leaving the spatial slices continuous. The resulting theory is free of the
diffeomorphism and Hamiltonian constraints, but one can impose the
diffeomorphism constraint to reduce its space of solutions and the constraint
is preserved exactly und... | [
{
"created": "Tue, 14 Sep 2004 19:03:00 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We apply the ``consistent discretization'' approach to general relativity leaving the spatial slices continuous. The resulting theory is free of the diffeomorphism and Hamiltonian constraints, but one can impose the diffeomorphism constraint to reduce its space of solutions and the constraint is preserved exactly under... |
gr-qc/0010058 | Frederick J. Ernst | I. Hauser and F. J. Ernst | The monodromy matrix method of solving an exterior boundary value
problem for a given stationary axisymmetric perfect fluid solution | 29 pages LaTeX | Gen.Rel.Grav.33:1985-2014,2001 | 10.1023/A:1013003110831 | null | gr-qc | null | A procedure is described for matching a given stationary axisymmetric perfect
fluid solution to a not necessarily asymptotically flat vacuum exterior. Using
data on the zero pressure surface, the procedure yields the Ernst potential of
the matching vacuum metric on the symmetry axis. From this the full metric can
be ... | [
{
"created": "Sun, 15 Oct 2000 16:02:20 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Hauser",
"I.",
""
],
[
"Ernst",
"F. J.",
""
]
] | A procedure is described for matching a given stationary axisymmetric perfect fluid solution to a not necessarily asymptotically flat vacuum exterior. Using data on the zero pressure surface, the procedure yields the Ernst potential of the matching vacuum metric on the symmetry axis. From this the full metric can be co... |
2110.05982 | Theodoros Papanikolaou | Ilia Musco, Theodoros Papanikolaou | Primordial black hole formation for an anisotropic perfect fluid:
Initial conditions and estimation of the threshold | Published in Physical Review D, Version 4: 16 pages, 7 figures, minor
changes in Sec. III | Phys.Rev.D 106 (2022) 8, 083017 | 10.1103/PhysRevD.106.083017 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work investigates the formation of primordial black holes within a
radiation fluid with an anisotropic pressure. We focus our attention on the
initial conditions describing cosmological perturbations in the super horizon
regime, using a covariant form of the equation of state in terms of pressure
and energy dens... | [
{
"created": "Tue, 12 Oct 2021 13:19:06 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Oct 2021 16:12:12 GMT",
"version": "v2"
},
{
"created": "Fri, 21 Jan 2022 17:32:21 GMT",
"version": "v3"
},
{
"created": "Mon, 24 Oct 2022 08:39:16 GMT",
"version": "v4"
}
] | 2022-10-25 | [
[
"Musco",
"Ilia",
""
],
[
"Papanikolaou",
"Theodoros",
""
]
] | This work investigates the formation of primordial black holes within a radiation fluid with an anisotropic pressure. We focus our attention on the initial conditions describing cosmological perturbations in the super horizon regime, using a covariant form of the equation of state in terms of pressure and energy densit... |
2008.04906 | Jie Jiang | Jie Jiang and Ming Zhang | Testing the Weak Cosmic Censorship Conjecture in Lanczos-Lovelock
gravity | 9 pages,1 figures | Phys. Rev. D 102, 084033 (2020) | 10.1103/PhysRevD.102.084033 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we test the weak cosmic censorship conjecture (WCCC) in the
nearly extremal static charged black holes of Lanczos-Lovelock-Maxwell gravity
based on the new version of gedanken experiments proposed by Sorce and Wald.
After introducing the null energy condition of the matter fields, we show that
the (nea... | [
{
"created": "Tue, 11 Aug 2020 04:19:04 GMT",
"version": "v1"
}
] | 2020-10-16 | [
[
"Jiang",
"Jie",
""
],
[
"Zhang",
"Ming",
""
]
] | In this paper, we test the weak cosmic censorship conjecture (WCCC) in the nearly extremal static charged black holes of Lanczos-Lovelock-Maxwell gravity based on the new version of gedanken experiments proposed by Sorce and Wald. After introducing the null energy condition of the matter fields, we show that the (nearl... |
2205.15724 | Bijan Bagchi | Bijan Bagchi and Sauvik Sen | MOND and asymptotic safe gravity | Inconsistencies noticed in some of the equations | null | null | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | The modified Newtonian dynamics (MOND) paradigm is discussed in the context
of asymptotic safe gravity. We estimate quantum correction to the logarithmic
potential which is well known to account for the constancy of the circular
velocity $v$ of the spiral galaxies. We determine plausible bounds on $v$.
| [
{
"created": "Tue, 31 May 2022 12:14:24 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Aug 2022 06:59:12 GMT",
"version": "v2"
}
] | 2022-08-23 | [
[
"Bagchi",
"Bijan",
""
],
[
"Sen",
"Sauvik",
""
]
] | The modified Newtonian dynamics (MOND) paradigm is discussed in the context of asymptotic safe gravity. We estimate quantum correction to the logarithmic potential which is well known to account for the constancy of the circular velocity $v$ of the spiral galaxies. We determine plausible bounds on $v$. |
1801.03718 | Cedric Troessaert | Marc Henneaux and C\'edric Troessaert | BMS Group at Spatial Infinity: the Hamiltonian (ADM) approach | 26 pages | null | 10.1007/JHEP03(2018)147 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | New boundary conditions for asymptotically flat spacetimes are given at
spatial infinity. These boundary conditions are invariant under the BMS group,
which acts non trivially. The boundary conditions fulfill all standard
consistency requirements: (i) they make the symplectic form finite; (ii) they
contain the Schwar... | [
{
"created": "Thu, 11 Jan 2018 11:29:05 GMT",
"version": "v1"
}
] | 2018-04-18 | [
[
"Henneaux",
"Marc",
""
],
[
"Troessaert",
"Cédric",
""
]
] | New boundary conditions for asymptotically flat spacetimes are given at spatial infinity. These boundary conditions are invariant under the BMS group, which acts non trivially. The boundary conditions fulfill all standard consistency requirements: (i) they make the symplectic form finite; (ii) they contain the Schwarzc... |
1001.0297 | Asoke Sen Dr. | A. K. Sen | Towards a more exact value of deflection of light due to static
gravitational mass | submitted to GRG, Springer | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The deflection of a ray of light passing close to a gravitational mass, is
generally calculated from the null geodesic which the light ray (photon)
follows. However, there is an alternate approach, where the effect of
gravitation on the ray of light is estimated by considering the ray to be
passing through a material... | [
{
"created": "Sat, 2 Jan 2010 11:38:40 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Feb 2010 07:23:52 GMT",
"version": "v2"
}
] | 2010-02-08 | [
[
"Sen",
"A. K.",
""
]
] | The deflection of a ray of light passing close to a gravitational mass, is generally calculated from the null geodesic which the light ray (photon) follows. However, there is an alternate approach, where the effect of gravitation on the ray of light is estimated by considering the ray to be passing through a material m... |
1805.11569 | Adam D. Helfer | Adam D. Helfer | Black hole uniqueness and magnetic shear | 7 pages, 1 figure GRF 2018 submission | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A series of tantalizing results led to the black hole uniqueness conjecture:
isolated, realistic black holes should settle down to states characterized by
their spin, mass and charge. I argue that generically real black holes will
also possess a `magnetic' shear; equivalently, that the dominant contribution
to their ... | [
{
"created": "Tue, 29 May 2018 16:27:18 GMT",
"version": "v1"
}
] | 2018-05-30 | [
[
"Helfer",
"Adam D.",
""
]
] | A series of tantalizing results led to the black hole uniqueness conjecture: isolated, realistic black holes should settle down to states characterized by their spin, mass and charge. I argue that generically real black holes will also possess a `magnetic' shear; equivalently, that the dominant contribution to their lo... |
2105.08586 | Alexey Golovnev | Alexey Golovnev | Issues of Lorentz-invariance in f(T) gravity and calculations for
spherically symmetric solutions | 13 pages; some more explanations added | Classical and Quantum Gravity 38 (2021) 197001 | 10.1088/1361-6382/ac2136 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The f(T) gravity is nowadays being widely used for cosmological model
building, as well as for constructing spherically symmetric solutions. In its
classical pure tetrad formulation it violates the local Lorentz symmetry in the
space of tetrads. By using an appropriate spin connection it can be brought to
a formally ... | [
{
"created": "Tue, 18 May 2021 15:14:15 GMT",
"version": "v1"
},
{
"created": "Fri, 21 May 2021 14:55:45 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Jul 2021 21:51:57 GMT",
"version": "v3"
}
] | 2021-09-24 | [
[
"Golovnev",
"Alexey",
""
]
] | The f(T) gravity is nowadays being widely used for cosmological model building, as well as for constructing spherically symmetric solutions. In its classical pure tetrad formulation it violates the local Lorentz symmetry in the space of tetrads. By using an appropriate spin connection it can be brought to a formally Lo... |
2109.02660 | Luc\'ia Men\'endez-Pidal | Steffen Gielen and Luc\'ia Men\'endez-Pidal | Unitarity, clock dependence and quantum recollapse in quantum cosmology | 53 pages, 12 figures, matches version accepted for publication | Class. Quantum Grav. 39 (2022), 075011 | 10.1088/1361-6382/ac504f | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We continue our analysis of a quantum cosmology model describing a flat
Friedmann--Lema\^itre--Robertson--Walker universe filled with a (free) massless
scalar field and an arbitrary perfect fluid. For positive energy density in the
scalar and fluid, each classical solution has a singularity and expands to
infinite vo... | [
{
"created": "Mon, 6 Sep 2021 18:00:02 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Jan 2022 14:19:46 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Apr 2022 16:18:00 GMT",
"version": "v3"
}
] | 2022-04-08 | [
[
"Gielen",
"Steffen",
""
],
[
"Menéndez-Pidal",
"Lucía",
""
]
] | We continue our analysis of a quantum cosmology model describing a flat Friedmann--Lema\^itre--Robertson--Walker universe filled with a (free) massless scalar field and an arbitrary perfect fluid. For positive energy density in the scalar and fluid, each classical solution has a singularity and expands to infinite volu... |
1311.2530 | Astrid Eichhorn | Astrid Eichhorn, Sebastian Mizera | Spectral dimension in causal set quantum gravity | 16 pages, 11 figures | null | 10.1088/0264-9381/31/12/125007 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We evaluate the spectral dimension in causal set quantum gravity by
simulating random walks on causal sets. In contrast to other approaches to
quantum gravity, we find an increasing spectral dimension at small scales. This
observation can be connected to the non-locality of causal set theory that is
deeply rooted in ... | [
{
"created": "Mon, 11 Nov 2013 18:54:20 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Eichhorn",
"Astrid",
""
],
[
"Mizera",
"Sebastian",
""
]
] | We evaluate the spectral dimension in causal set quantum gravity by simulating random walks on causal sets. In contrast to other approaches to quantum gravity, we find an increasing spectral dimension at small scales. This observation can be connected to the non-locality of causal set theory that is deeply rooted in it... |
1404.0476 | Luciano Vanzo | Luciano Vanzo | {\Lambda} may not be vacuum energy, after all | 5 pages, Essay written for the Gravity Research Foundation 2014
Awards for Essays on Gravitation | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We suggest the possibility that the mysterious dark energy component driving
the acceleration of the Universe is the leading term, in the de Sitter
temperature, of the free energy density of space-time seen as a quantum gravity
coherent state of the gravitational field. The corresponding field theory
classically has ... | [
{
"created": "Wed, 2 Apr 2014 08:04:11 GMT",
"version": "v1"
}
] | 2014-04-03 | [
[
"Vanzo",
"Luciano",
""
]
] | We suggest the possibility that the mysterious dark energy component driving the acceleration of the Universe is the leading term, in the de Sitter temperature, of the free energy density of space-time seen as a quantum gravity coherent state of the gravitational field. The corresponding field theory classically has po... |
2403.00253 | Tayyab Naseer | M. Sharif, T. Naseer | Effects of
$f(\mathcal{R},\mathcal{T},\mathcal{R}_{\gamma\upsilon}\mathcal{T}^{\gamma\upsilon})$
Gravity on Anisotropic Charged Compact Structures | 30 pages, 8 figures | Chin. J. Phys. 73(2021)179-194 | 10.1016/j.cjph.2021.06.009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper focuses on the analysis of static spherically symmetric
anisotropic solutions in the presence of electromagnetic field through the
gravitational decoupling approach in
$f(\mathcal{R},\mathcal{T},\mathcal{R}_{\gamma\upsilon}\mathcal{T}^{\gamma\upsilon})$
gravity. We use geometric deformation only on radial ... | [
{
"created": "Fri, 1 Mar 2024 03:36:35 GMT",
"version": "v1"
}
] | 2024-03-04 | [
[
"Sharif",
"M.",
""
],
[
"Naseer",
"T.",
""
]
] | This paper focuses on the analysis of static spherically symmetric anisotropic solutions in the presence of electromagnetic field through the gravitational decoupling approach in $f(\mathcal{R},\mathcal{T},\mathcal{R}_{\gamma\upsilon}\mathcal{T}^{\gamma\upsilon})$ gravity. We use geometric deformation only on radial me... |
1707.08568 | Hyerim Noh | Hyerim Noh, Jai-chan Hwang, Chan-Gyung Park | Axion as a cold dark matter candidate: Proof to fully nonlinear order | 6 pages, no figure | null | 10.3847/1538-4357/aa8366 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a proof of the axion as a cold dark matter candidate to the fully
nonlinear order perturbations based on Einstein's gravity. We consider the
axion as a coherently oscillating massive classical scalar field without
interaction. We present the fully nonlinear and exact, except for {\it
ignoring} the transver... | [
{
"created": "Wed, 26 Jul 2017 07:36:04 GMT",
"version": "v1"
}
] | 2017-08-30 | [
[
"Noh",
"Hyerim",
""
],
[
"Hwang",
"Jai-chan",
""
],
[
"Park",
"Chan-Gyung",
""
]
] | We present a proof of the axion as a cold dark matter candidate to the fully nonlinear order perturbations based on Einstein's gravity. We consider the axion as a coherently oscillating massive classical scalar field without interaction. We present the fully nonlinear and exact, except for {\it ignoring} the transverse... |
2304.03449 | Jin Jia | Jin Jia and Pin Yu | Remark on the nonlinear stability of Minkowski spacetime: a rigidity
theorem | references added, typos corrected | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of the nonlinear stability of Minkowski spacetime, we show
that if the radiation field of the curvature tensor vanishes, the spacetime
must be flat.
| [
{
"created": "Fri, 7 Apr 2023 02:43:12 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Apr 2023 06:31:43 GMT",
"version": "v2"
}
] | 2023-04-11 | [
[
"Jia",
"Jin",
""
],
[
"Yu",
"Pin",
""
]
] | In the framework of the nonlinear stability of Minkowski spacetime, we show that if the radiation field of the curvature tensor vanishes, the spacetime must be flat. |
2106.08464 | Md Sabir Ali | Md Sabir Ali, and Shagun Kaushal | Gravitational lensing for stationary axisymmetric black holes in
Eddington-inspired Born-Infeld gravity | 29 pages, 7 figures, Accepted for publication in Physical Review D | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent years witnessed a surge of interest of the lensing of the black
holes arising from general as well as other modified theories of gravity due to
the experimental data available from the EHT results. The EHT may open a new
door indicating the possible existence of the rotating black hole solutions in
modifie... | [
{
"created": "Tue, 15 Jun 2021 22:16:25 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Jan 2022 16:56:03 GMT",
"version": "v2"
}
] | 2022-01-19 | [
[
"Ali",
"Md Sabir",
""
],
[
"Kaushal",
"Shagun",
""
]
] | The recent years witnessed a surge of interest of the lensing of the black holes arising from general as well as other modified theories of gravity due to the experimental data available from the EHT results. The EHT may open a new door indicating the possible existence of the rotating black hole solutions in modified ... |
1412.0478 | Yosef Verbin | Y. Brihaye and Y. Verbin | Self-Gravitating Spherical Solutions of the non-minimally coupled
non-Abelian Higgs Model | null | Phys. Rev. D 91, 064021 (2015) | 10.1103/PhysRevD.91.064021 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the Higgs Inflation scenario, we study static
spherically-symmetric solutions of the non-Abelian Higgs model coupled
non-minimally to Gravity. We find solutions for the self-gravitating sphaleron
as well as monopole-like solutions and study the impact of the non-minimal
coupling on their properties. Fina... | [
{
"created": "Mon, 1 Dec 2014 13:49:41 GMT",
"version": "v1"
}
] | 2015-03-18 | [
[
"Brihaye",
"Y.",
""
],
[
"Verbin",
"Y.",
""
]
] | Motivated by the Higgs Inflation scenario, we study static spherically-symmetric solutions of the non-Abelian Higgs model coupled non-minimally to Gravity. We find solutions for the self-gravitating sphaleron as well as monopole-like solutions and study the impact of the non-minimal coupling on their properties. Finall... |
1907.05265 | Carlos A. Mar\'in V. | Carlos A. Mar\'in and Jorge Poveda | Light deflection around a spherical charged black hole to second order.
Multivariate Pad\'e approximants | 32 pages, 8 figures. arXiv admin note: text overlap with
arXiv:1701.04434 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | From the Reissner-Nordstrom metric we obtain the higher-order terms for the
deflection of light around a massive-charged black hole using the
Lindstedt-Poincar\'e method to solve the equation of motion of a photon around
the compact object. The corrections are performed developing the expansion in
terms of $\epsilon=... | [
{
"created": "Wed, 10 Jul 2019 17:35:44 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Jul 2019 17:33:49 GMT",
"version": "v2"
}
] | 2019-08-01 | [
[
"Marín",
"Carlos A.",
""
],
[
"Poveda",
"Jorge",
""
]
] | From the Reissner-Nordstrom metric we obtain the higher-order terms for the deflection of light around a massive-charged black hole using the Lindstedt-Poincar\'e method to solve the equation of motion of a photon around the compact object. The corrections are performed developing the expansion in terms of $\epsilon=\f... |
1912.13035 | Michael Crescimanno | Martin D. Strong, Michael Crescimanno | Lagrange point stability for a rotating host mass binary | Version accepted for publication in PRD | Phys. Rev. D 102, 024052 (2020) | 10.1103/PhysRevD.102.024052 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this new era of gravitational wave astrophysics, observations have
indicated the likely existence of black holes with significant spin. In order
to better understand the potential imprint orbital dynamics have on the
multi-messenger data, we include rotation of the primary mass to leading order
in the analysis of ... | [
{
"created": "Mon, 30 Dec 2019 18:06:47 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Jun 2020 18:45:40 GMT",
"version": "v2"
}
] | 2020-07-22 | [
[
"Strong",
"Martin D.",
""
],
[
"Crescimanno",
"Michael",
""
]
] | In this new era of gravitational wave astrophysics, observations have indicated the likely existence of black holes with significant spin. In order to better understand the potential imprint orbital dynamics have on the multi-messenger data, we include rotation of the primary mass to leading order in the analysis of th... |
1803.00348 | D\'aniel Barta | D\'aniel Barta, M\'aty\'as Vas\'uth | Fast prediction and evaluation of eccentric inspirals using
reduced-order models | null | Phys. Rev. D 97, 124011 (2018) | 10.1103/PhysRevD.97.124011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A large number of theoretically predicted waveforms are required by
matched-filtering searches for the gravitational-wave signals produced by
compact binary coalescence. In order to substantially alleviate the
computational burden in gravitational-wave searches and parameter estimation
without degrading the signal de... | [
{
"created": "Thu, 1 Mar 2018 12:51:26 GMT",
"version": "v1"
}
] | 2018-06-11 | [
[
"Barta",
"Dániel",
""
],
[
"Vasúth",
"Mátyás",
""
]
] | A large number of theoretically predicted waveforms are required by matched-filtering searches for the gravitational-wave signals produced by compact binary coalescence. In order to substantially alleviate the computational burden in gravitational-wave searches and parameter estimation without degrading the signal dete... |
1406.0822 | Xian Gao | Xian Gao | Unifying framework for scalar-tensor theories of gravity | 5 pages; v2 comments added; v3 published version | Phys. Rev. D 90, 081501 (2014) | 10.1103/PhysRevD.90.081501 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general framework for effective theories propagating two tensor and one
scalar degrees of freedom is investigated. Geometrically, it describes
dynamical foliation of spacelike hypersurfaces coupled to a general background,
in which the scalar mode encodes the fluctuation of the hypersurfaces. Within
this framework,... | [
{
"created": "Tue, 3 Jun 2014 19:28:38 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Aug 2014 15:34:49 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Oct 2014 13:32:37 GMT",
"version": "v3"
}
] | 2014-10-29 | [
[
"Gao",
"Xian",
""
]
] | A general framework for effective theories propagating two tensor and one scalar degrees of freedom is investigated. Geometrically, it describes dynamical foliation of spacelike hypersurfaces coupled to a general background, in which the scalar mode encodes the fluctuation of the hypersurfaces. Within this framework, v... |
1108.3962 | John Barrow | John D. Barrow and Kei Yamamoto | The Instabilities of Bianchi Type IX Einstein Static Universes | 11 pages, no figures + revisions | Phys. Rev. D 85, 083505 (2012) | 10.1103/PhysRevD.85.083505 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the stability of the Einstein static universe as a non-LRS
Bianchi type IX solution of the Einstein equations in the presence of both
non-tilted and tilted fluids. We find that the static universe is unstable to
homogeneous perturbations of Bianchi type IX to the future and the past.
| [
{
"created": "Fri, 19 Aug 2011 13:24:46 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Feb 2012 11:47:44 GMT",
"version": "v2"
}
] | 2015-05-30 | [
[
"Barrow",
"John D.",
""
],
[
"Yamamoto",
"Kei",
""
]
] | We investigate the stability of the Einstein static universe as a non-LRS Bianchi type IX solution of the Einstein equations in the presence of both non-tilted and tilted fluids. We find that the static universe is unstable to homogeneous perturbations of Bianchi type IX to the future and the past. |
1701.06343 | John Barrow | John D. Barrow and G.W. Gibbons | A maximum magnetic moment to angular momentum conjecture | 24 pages, no figures; to appear in Phys Rev D, refs added and typos
corrected | Phys. Rev. D 95, 064040 (2017) | 10.1103/PhysRevD.95.064040 | null | gr-qc astro-ph.CO hep-th physics.hist-ph | http://creativecommons.org/licenses/by/4.0/ | Conjectures play a central role in theoretical physics, especially those that
assert an upper bound to some dimensionless ratio of physical quantities. In
this paper we introduce a new such conjecture bounding the ratio of the
magnetic moment to angular momentum in nature. We also discuss the current
status of some o... | [
{
"created": "Mon, 23 Jan 2017 11:43:50 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Feb 2017 14:05:50 GMT",
"version": "v2"
}
] | 2017-03-29 | [
[
"Barrow",
"John D.",
""
],
[
"Gibbons",
"G. W.",
""
]
] | Conjectures play a central role in theoretical physics, especially those that assert an upper bound to some dimensionless ratio of physical quantities. In this paper we introduce a new such conjecture bounding the ratio of the magnetic moment to angular momentum in nature. We also discuss the current status of some old... |
gr-qc/0205012 | Jacques L. Rubin | Jacques L. Rubin | Navigation of Spacetime Ships in Unified Gravitational and
Electromagnetic Waves | 28 pages. Relative to the second version some changes in the
mathematical results have been corrected without consequences in the physical
model. The conformally flatness of the substratum spacetime which is an
assumption used throughout in the mathematical developements from chapter 2,
has been well precised i... | null | null | Preprint INLN #2002/13 | gr-qc | null | On the basis of a "local" principle of equivalence of general relativity, we
consider a navigation in a kind of "4D-ocean" involving measurements of
conformally invariant physical properties only. Then, applying the Pfaff theory
for PDE to a particular conformally equivariant system of differential
equations, we show... | [
{
"created": "Thu, 2 May 2002 22:39:00 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Jun 2002 10:54:52 GMT",
"version": "v2"
},
{
"created": "Wed, 6 Oct 2004 13:22:47 GMT",
"version": "v3"
},
{
"created": "Thu, 7 Oct 2004 23:04:57 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Rubin",
"Jacques L.",
""
]
] | On the basis of a "local" principle of equivalence of general relativity, we consider a navigation in a kind of "4D-ocean" involving measurements of conformally invariant physical properties only. Then, applying the Pfaff theory for PDE to a particular conformally equivariant system of differential equations, we show t... |
1207.5496 | Kayll Lake | Majd Abdelqader and Kayll Lake | Visualizing Spacetime Curvature via Gradient Flows II: An Example of the
Construction of a Newtonian analogue | 12 pages twocolumn revtex 4-1 9 figures. Expanded and corrected | Phys. Rev. D 86, 124037 (2012) | 10.1103/PhysRevD.86.124037 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is the first in a series of papers in which the gradient flows of
fundamental curvature invariants are used to formulate a visualization of
curvature. We start with the construction of strict Newtonian analogues (not
limits) of solutions to Einstein's equations based on the topology of the
associated gradient fl... | [
{
"created": "Mon, 23 Jul 2012 19:38:46 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Nov 2012 21:11:08 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Abdelqader",
"Majd",
""
],
[
"Lake",
"Kayll",
""
]
] | This is the first in a series of papers in which the gradient flows of fundamental curvature invariants are used to formulate a visualization of curvature. We start with the construction of strict Newtonian analogues (not limits) of solutions to Einstein's equations based on the topology of the associated gradient flow... |
1904.11600 | Ehsan Sadri | Ehsan Sadri, Martiros Khurshudyan, Ding-fang Zeng | Scrutinizing Various Phenomenological Interactions In The Context Of
Holographic Ricci Dark Energy Models | 27 pages, 60 figures | null | 10.1140/epjc/s10052-020-7983-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we examine two types of interacting holographic dark energy
model using Pantheon supernova data, BAO BOSS DR12, CMB Planck 2015, fgas (gas
mass fraction) and SZ/Xray (Sunyaev-Zeldovich effect and X-ray emission) data
from galaxy clusters (GC). In particular, we considered the Holographic Ricci
dark ene... | [
{
"created": "Thu, 25 Apr 2019 21:44:25 GMT",
"version": "v1"
},
{
"created": "Mon, 13 May 2019 22:39:58 GMT",
"version": "v2"
},
{
"created": "Sat, 11 Jul 2020 11:38:33 GMT",
"version": "v3"
}
] | 2020-07-14 | [
[
"Sadri",
"Ehsan",
""
],
[
"Khurshudyan",
"Martiros",
""
],
[
"Zeng",
"Ding-fang",
""
]
] | In this paper, we examine two types of interacting holographic dark energy model using Pantheon supernova data, BAO BOSS DR12, CMB Planck 2015, fgas (gas mass fraction) and SZ/Xray (Sunyaev-Zeldovich effect and X-ray emission) data from galaxy clusters (GC). In particular, we considered the Holographic Ricci dark energ... |
1308.1315 | Anuradha Gupta | Anuradha Gupta and Achamveedu Gopakumar | Time-domain inspiral templates for spinning compact binaries in
quasi-circular orbits described by their orbital angular momenta | 23 pages, 6 figures, Several improvements in the text, one new figure
and new references added, version accepted for publication in CQG | Class. Quantum Grav. 31 (2014) 065014 | 10.1088/0264-9381/31/6/065014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a prescription to compute the time-domain gravitational wave (GW)
polarization states associated with spinning compact binaries inspiraling along
quasi-circular orbits. We invoke the orbital angular momentum $\vek L$ rather
than its Newtonian counterpart $\vek L_{\rm N}$ to describe the binary orbits
while... | [
{
"created": "Tue, 6 Aug 2013 15:39:42 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Feb 2014 16:45:41 GMT",
"version": "v2"
}
] | 2014-03-03 | [
[
"Gupta",
"Anuradha",
""
],
[
"Gopakumar",
"Achamveedu",
""
]
] | We present a prescription to compute the time-domain gravitational wave (GW) polarization states associated with spinning compact binaries inspiraling along quasi-circular orbits. We invoke the orbital angular momentum $\vek L$ rather than its Newtonian counterpart $\vek L_{\rm N}$ to describe the binary orbits while t... |
0911.3697 | Ali Mozaffari | Joao Magueijo, Ali Mozaffari | Simple generalizations of Anti-de Sitter space-time | 6 Pages, 5 Figures, Corrections and additions made for publication in
Journal of Classical and Quantum Gravity | Class.Quant.Grav.27:135004,2010 | 10.1088/0264-9381/27/13/135004 | Imperial/TP/2009/JM&AM/0911.3697 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider new cosmological solutions which generalize the cosmological
patch of the Anti-de Sitter (AdS) space-time, allowing for fluids with
equations of state such that $w\neq -1$. We use them to derive the associated
full manifolds. We find that these solutions can all be embedded in flat
five-dimensional space-... | [
{
"created": "Thu, 19 Nov 2009 13:18:05 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Jan 2010 22:02:29 GMT",
"version": "v2"
},
{
"created": "Thu, 25 Mar 2010 18:43:48 GMT",
"version": "v3"
}
] | 2010-05-25 | [
[
"Magueijo",
"Joao",
""
],
[
"Mozaffari",
"Ali",
""
]
] | We consider new cosmological solutions which generalize the cosmological patch of the Anti-de Sitter (AdS) space-time, allowing for fluids with equations of state such that $w\neq -1$. We use them to derive the associated full manifolds. We find that these solutions can all be embedded in flat five-dimensional space-ti... |
1407.5021 | Lorenzo Iorio | Lorenzo Iorio | Post-Keplerian corrections to the orbital periods of a two-body system
and their measurability | LaTex2e, 8 pages, no figures, no tables. Version matching the one at
press in Monthly Notices of the Royal Astronomical Society (MNRAS). Typos
corrected in equations (65)-(67) | Mon.Not.Roy.Astron.Soc. 460 : 2445-2452, 2016 | 10.1093/mnras/stw1155 | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The orbital motion of a binary system is characterized by various
characteristic temporal intervals which, by definition, are different from each
other: the draconitic, anomalistic and sidereal periods. They all coincide in
the Keplerian case. Such a degeneracy is removed, in general, when a
post-Keplerian accelerati... | [
{
"created": "Thu, 17 Jul 2014 15:04:46 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Apr 2016 18:10:53 GMT",
"version": "v2"
},
{
"created": "Mon, 9 May 2016 14:31:43 GMT",
"version": "v3"
},
{
"created": "Wed, 25 May 2016 19:31:20 GMT",
"version": "v4"
}
] | 2016-06-15 | [
[
"Iorio",
"Lorenzo",
""
]
] | The orbital motion of a binary system is characterized by various characteristic temporal intervals which, by definition, are different from each other: the draconitic, anomalistic and sidereal periods. They all coincide in the Keplerian case. Such a degeneracy is removed, in general, when a post-Keplerian acceleration... |
2202.03114 | Takahisa Igata | Takahisa Igata, Yohsuke Takamori | Periapsis shifts in dark matter distribution with a dense core | 14 pages, 3 figures; v2: published version | Phys. Rev. D 105, 124029 (2022) | 10.1103/PhysRevD.105.124029 | KEK-TH-2395, KEK-Cosmo-0285 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the periapsis shifts in dark matter distribution with a dense
core. We model the dark matter distribution as an isotropic gas sphere, the
Emden polytropic sphere of index 5 in general relativity. This model has a
parameter range where all the energy conditions are satisfied in the entire
region. Within th... | [
{
"created": "Mon, 7 Feb 2022 12:47:48 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Jul 2022 04:23:18 GMT",
"version": "v2"
}
] | 2022-07-18 | [
[
"Igata",
"Takahisa",
""
],
[
"Takamori",
"Yohsuke",
""
]
] | We consider the periapsis shifts in dark matter distribution with a dense core. We model the dark matter distribution as an isotropic gas sphere, the Emden polytropic sphere of index 5 in general relativity. This model has a parameter range where all the energy conditions are satisfied in the entire region. Within the ... |
gr-qc/9504018 | Donald Marolf | Abhay Ashtekar, Jerzy Lewandowski, Donald Marolf, Jose Mourao, Thomas
Thiemann | Quantization of diffeomorphism invariant theories of connections with
local degrees of freedom | 30 pages Revtex, Section 6 corrected, references added, format
changed | J.Math.Phys.36:6456-6493,1995 | 10.1063/1.531252 | UCSBTH-95-7 | gr-qc | null | Quantization of diffeomorphism invariant theories of connections is studied.
A solutions of the diffeomorphism constraints is found. The space of solutions
is equipped with an inner product that is shown to satisfy the physical reality
conditions. This provides, in particular, a quantization of the
Husain-Kucha\v{r} ... | [
{
"created": "Wed, 12 Apr 1995 21:06:50 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Jun 1995 16:35:53 GMT",
"version": "v2"
}
] | 2010-11-01 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Lewandowski",
"Jerzy",
""
],
[
"Marolf",
"Donald",
""
],
[
"Mourao",
"Jose",
""
],
[
"Thiemann",
"Thomas",
""
]
] | Quantization of diffeomorphism invariant theories of connections is studied. A solutions of the diffeomorphism constraints is found. The space of solutions is equipped with an inner product that is shown to satisfy the physical reality conditions. This provides, in particular, a quantization of the Husain-Kucha\v{r} mo... |
1111.1766 | Chun-Yen Lin | Chun-Yen Lin | Emergence of Loop Quantum Cosmology from Loop Quantum Gravity: Lowest
Order in h | 31 pages MikteX file with 1 pdf figure | Chin. J. Phys. 53 (2015) 110104 | 10.6122/CJP.20150911 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To derive loop quantum cosmology from loop quantum gravity, I apply the model
given in \cite{lin1} to a system with coupled gravitational and matter fields.
The matter sector consists of a scalar field $phi$ serving as a cosmological
clock, and other fields ${psi}$ providing physical spatial coordinates and
frames. T... | [
{
"created": "Mon, 7 Nov 2011 23:34:47 GMT",
"version": "v1"
}
] | 2018-07-23 | [
[
"Lin",
"Chun-Yen",
""
]
] | To derive loop quantum cosmology from loop quantum gravity, I apply the model given in \cite{lin1} to a system with coupled gravitational and matter fields. The matter sector consists of a scalar field $phi$ serving as a cosmological clock, and other fields ${psi}$ providing physical spatial coordinates and frames. The... |
gr-qc/0310056 | Tomislav Prokopec | Tomislav Prokopec (U. Heidelberg) and Richard P. Woodard (U. Florida) | Dynamics of super-horizon photons during inflation with vacuum
polarization | 16 pages, 2 figures | Annals Phys. 312 (2004) 1-16 | 10.1016/j.aop.2004.01.012 | CERN-TH/2003-172, HD-THEP-03-38, UFIFT-HEP-03-20 | gr-qc astro-ph hep-ph | null | We study asymptotic dynamics of photons propagating in the polarized vacuum
of a locally de Sitter Universe. The origin of the vacuum polarization is
fluctuations of a massless, minimally coupled, scalar, which we model by the
one-loop vacuum polarization tensor of scalar electrodynamics. We show that
late time dynam... | [
{
"created": "Fri, 10 Oct 2003 16:52:27 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Oct 2003 23:57:55 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Prokopec",
"Tomislav",
"",
"U. Heidelberg"
],
[
"Woodard",
"Richard P.",
"",
"U. Florida"
]
] | We study asymptotic dynamics of photons propagating in the polarized vacuum of a locally de Sitter Universe. The origin of the vacuum polarization is fluctuations of a massless, minimally coupled, scalar, which we model by the one-loop vacuum polarization tensor of scalar electrodynamics. We show that late time dynamic... |
1104.2765 | Maite Dupuis | Mait\'e Dupuis | Spin Foam Models for Quantum Gravity and semi-classical limit | PhD Thesis; Ecole Normale Sup\'erieure de Lyon. (192pages, many
figures) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spinfoam framework is a proposal for a regularized path integral for
quantum gravity. Spinfoams define quantum space-time structures describing the
evolution in time of the spin network states for quantum geometry derived from
Loop Quantum Gravity (LQG). The construction of this covariant approach is
based on the... | [
{
"created": "Thu, 14 Apr 2011 13:56:31 GMT",
"version": "v1"
}
] | 2015-03-19 | [
[
"Dupuis",
"Maité",
""
]
] | The spinfoam framework is a proposal for a regularized path integral for quantum gravity. Spinfoams define quantum space-time structures describing the evolution in time of the spin network states for quantum geometry derived from Loop Quantum Gravity (LQG). The construction of this covariant approach is based on the f... |
gr-qc/0606093 | Eric Poisson | Brent Preston and Eric Poisson | Light-cone coordinates based at a geodesic world line | 11 pages, 1 figure | Phys.Rev. D74 (2006) 064009 | 10.1103/PhysRevD.74.064009 | null | gr-qc | null | Continuing work initiated in an earlier publication [Phys. Rev. D 69, 084007
(2004)], we construct a system of light-cone coordinates based at a geodesic
world line of an arbitrary curved spacetime. The construction involves (i) an
advanced-time or a retarded-time coordinate that labels past or future light
cones cen... | [
{
"created": "Wed, 21 Jun 2006 20:34:24 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Preston",
"Brent",
""
],
[
"Poisson",
"Eric",
""
]
] | Continuing work initiated in an earlier publication [Phys. Rev. D 69, 084007 (2004)], we construct a system of light-cone coordinates based at a geodesic world line of an arbitrary curved spacetime. The construction involves (i) an advanced-time or a retarded-time coordinate that labels past or future light cones cente... |
1407.3027 | Leonid Perlov | Leonid Perlov | Convergent $\tilde{Y}$-Map for a new covariant Loop Quantum Gravity
formulation | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The most important part of the new spin-foam loop quantum gravity formulation
is the map $Y$: $H^{SU(2)} \rightarrow H^{SL(2,C)}$. It was only recently shown
that the Y-Map is convergent in spite of the fact that the classical Peter-Weyl
theorem is not applicable to it, as Lorentz group is not compact. In this paper
... | [
{
"created": "Fri, 11 Jul 2014 05:04:31 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Feb 2015 06:27:57 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Oct 2015 02:49:07 GMT",
"version": "v3"
}
] | 2015-10-08 | [
[
"Perlov",
"Leonid",
""
]
] | The most important part of the new spin-foam loop quantum gravity formulation is the map $Y$: $H^{SU(2)} \rightarrow H^{SL(2,C)}$. It was only recently shown that the Y-Map is convergent in spite of the fact that the classical Peter-Weyl theorem is not applicable to it, as Lorentz group is not compact. In this paper we... |
2307.12190 | Nikodem Poplawski | Nikodem Pop{\l}awski | Gravitational Collapse with Torsion and Universe in a Black Hole | 10 pages. In: Regular Black Holes: Towards a New Paradigm of
Gravitational Collapse, C. Bambi (ed.), p. 485 (Springer, 2023). arXiv admin
note: substantial text overlap with arXiv:2008.02136 | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider gravitational collapse of a sphere of a fluid with torsion
generated by spin, which forms a black hole. We use the Tolman metric and the
Einstein$-$Cartan field equations with a relativistic spin fluid as a source.
We show that gravitational repulsion of torsion prevents a singularity,
replacing it with a... | [
{
"created": "Sun, 23 Jul 2023 00:31:33 GMT",
"version": "v1"
}
] | 2023-09-22 | [
[
"Popławski",
"Nikodem",
""
]
] | We consider gravitational collapse of a sphere of a fluid with torsion generated by spin, which forms a black hole. We use the Tolman metric and the Einstein$-$Cartan field equations with a relativistic spin fluid as a source. We show that gravitational repulsion of torsion prevents a singularity, replacing it with a n... |
1009.3667 | Anastasia Golubtsova | A. A. Golubtsova and V. D. Ivashchuk | On multidimensional analogs of Melvin's solution for classical series of
Lie algebras | 6 pages, based on a report at RUSGRAV-13 (23-28 June, 2008, PFUR,
Moscow) | Grav.Cosmol.15:144-147,2009 | 10.1134/S0202289309020078 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A multidimensional generalization of Melvin's solution for an arbitrary
simple Lie algebra $\cal G$ is presented. The gravitational model contains n
2-forms and $l \geq n$ scalar fields, wheren is the rank of $\cal G$. The
solution is governed by a set of n functions obeying n ordinary differential
equations with cer... | [
{
"created": "Sun, 19 Sep 2010 23:06:27 GMT",
"version": "v1"
}
] | 2010-11-26 | [
[
"Golubtsova",
"A. A.",
""
],
[
"Ivashchuk",
"V. D.",
""
]
] | A multidimensional generalization of Melvin's solution for an arbitrary simple Lie algebra $\cal G$ is presented. The gravitational model contains n 2-forms and $l \geq n$ scalar fields, wheren is the rank of $\cal G$. The solution is governed by a set of n functions obeying n ordinary differential equations with certa... |
gr-qc/9311020 | Guillermo Mena | Guillermo A. Mena Marugan | Reality Conditions for Lorentzian and Euclidean Gravity in the Ashtekar
Formulation | 24 pages (Latex), Preprint CGPG-93/11-2 | Int. J. Mod. Phys. D3 (1994) 513-528 | 10.1142/S0218271894000678 | null | gr-qc | null | Using Ashtekar variables, we analyze Lorentzian and Euclidean gravity in
vacuum up to a constant conformal transformation. We prove that the reality
conditions are invariant under a Wick rotation of the time, and show that the
compatibility of the algebra of commutators and constraints with the involution
defined by ... | [
{
"created": "Thu, 11 Nov 1993 20:16:11 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Marugan",
"Guillermo A. Mena",
""
]
] | Using Ashtekar variables, we analyze Lorentzian and Euclidean gravity in vacuum up to a constant conformal transformation. We prove that the reality conditions are invariant under a Wick rotation of the time, and show that the compatibility of the algebra of commutators and constraints with the involution defined by th... |
2205.11260 | Soham Sen | Soham Sen, Rituparna Mandal and Sunandan Gangopadhyay | Near horizon aspects (and beyond) of acceleration radiation of an atom
falling into a large class of static spherically symmetric black hole
geometries | This revised version of the manuscript has been accepted for
publication in Physical Review D | Phys. Rev. D 106 (2022) 025004 | 10.1103/PhysRevD.106.025004 | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | The near horizon aspects (and beyond) of a black hole metric, which belongs
to a large class of static spherically symmetric black holes, are considered
here. It has been realized recently that an atom falling into a black hole
leads to the generation of acceleration radiation through virtual transitions.
In recent s... | [
{
"created": "Fri, 20 May 2022 11:41:04 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jul 2022 02:51:40 GMT",
"version": "v2"
}
] | 2022-07-11 | [
[
"Sen",
"Soham",
""
],
[
"Mandal",
"Rituparna",
""
],
[
"Gangopadhyay",
"Sunandan",
""
]
] | The near horizon aspects (and beyond) of a black hole metric, which belongs to a large class of static spherically symmetric black holes, are considered here. It has been realized recently that an atom falling into a black hole leads to the generation of acceleration radiation through virtual transitions. In recent stu... |
1012.2431 | Balakin Alexander | Alexander B. Balakin and Vladimir V. Bochkarev | Archimedean-type force in a cosmic dark fluid: I. Exact solutions for
the late-time accelerated expansion | 13 pages, 1 figure, Part I, typos corrected, references corrected | Phys.Rev.D83:024035,2011 | 10.1103/PhysRevD.83.024035 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish a new self-consistent model in order to explain from a unified
viewpoint two key features of the cosmological evolution: the inflation in the
early Universe and the late-time accelerated expansion. The key element of this
new model is the Archimedean-type coupling of the dark matter with dark energy,
whi... | [
{
"created": "Sat, 11 Dec 2010 07:36:15 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Feb 2011 17:56:33 GMT",
"version": "v2"
}
] | 2011-02-28 | [
[
"Balakin",
"Alexander B.",
""
],
[
"Bochkarev",
"Vladimir V.",
""
]
] | We establish a new self-consistent model in order to explain from a unified viewpoint two key features of the cosmological evolution: the inflation in the early Universe and the late-time accelerated expansion. The key element of this new model is the Archimedean-type coupling of the dark matter with dark energy, which... |
1001.3074 | Luciano Rezzolla | Luciano Rezzolla, Luca Baiotti, Bruno Giacomazzo, David Link, Jose A.
Font | Accurate evolutions of unequal-mass neutron-star binaries: properties of
the torus and short GRB engines | 35 pages; small changes to match the published version | Class. Quantum Grav. 27 114105 (2010) | 10.1088/0264-9381/27/11/114105 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present new results from accurate and fully general-relativistic
simulations of the coalescence of unmagnetized binary neutron stars with
various mass ratios. The evolution of the stars is followed through the
inspiral phase, the merger and prompt collapse to a black hole, up until the
appearance of a thick accret... | [
{
"created": "Fri, 15 Jan 2010 19:12:28 GMT",
"version": "v1"
},
{
"created": "Thu, 13 May 2010 21:03:09 GMT",
"version": "v2"
}
] | 2015-05-18 | [
[
"Rezzolla",
"Luciano",
""
],
[
"Baiotti",
"Luca",
""
],
[
"Giacomazzo",
"Bruno",
""
],
[
"Link",
"David",
""
],
[
"Font",
"Jose A.",
""
]
] | We present new results from accurate and fully general-relativistic simulations of the coalescence of unmagnetized binary neutron stars with various mass ratios. The evolution of the stars is followed through the inspiral phase, the merger and prompt collapse to a black hole, up until the appearance of a thick accretio... |
2404.17849 | Mohammad Ali S. Afshar | Jafar Sadeghi, Mohammad Ali S. Afshar, Saeed Noori Gashti, Mohammad
Reza Alipour | Kramer's Escape Rate and Phase Transition Dynamics in AdS Black Holes
with Dark Structures | 32 pages, 11 figures. The updated version of manuscript includes new
calculations, discussions, and optimization of the results | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Traditional static methods in phase transition studies, such as the
swallowtail bifurcation diagram, provide good insights into the thermodynamics
of black holes. However, they practically lose sight of the dynamic aspects and
temporal sequence of events. The Kramers escape rate, central to our research,
offers a som... | [
{
"created": "Sat, 27 Apr 2024 09:56:41 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Jul 2024 11:44:25 GMT",
"version": "v2"
}
] | 2024-07-30 | [
[
"Sadeghi",
"Jafar",
""
],
[
"Afshar",
"Mohammad Ali S.",
""
],
[
"Gashti",
"Saeed Noori",
""
],
[
"Alipour",
"Mohammad Reza",
""
]
] | Traditional static methods in phase transition studies, such as the swallowtail bifurcation diagram, provide good insights into the thermodynamics of black holes. However, they practically lose sight of the dynamic aspects and temporal sequence of events. The Kramers escape rate, central to our research, offers a somew... |
gr-qc/0003062 | Kazuyasu Shigemoto | M. Kenmoku, M. Ohto, K. Shigemoto and K. Uehara | The Scenario for the Astrophysics with Scalar Field and the Cosmological
Constant | 16 pages, Latex | Nuovo Cim.B115:1203-1216,2000 | null | NWU-11/00 | gr-qc | null | In order to give the standard scenario of the astrophysics, we study the
Einstein theory with minimally coupled scalar field and the cosmological term
by considering the scalar field as a candidate of the dark matter. We obtained
the exact solution in the cosmological scale and the approximate gravitational
potential... | [
{
"created": "Wed, 15 Mar 2000 14:47:48 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Kenmoku",
"M.",
""
],
[
"Ohto",
"M.",
""
],
[
"Shigemoto",
"K.",
""
],
[
"Uehara",
"K.",
""
]
] | In order to give the standard scenario of the astrophysics, we study the Einstein theory with minimally coupled scalar field and the cosmological term by considering the scalar field as a candidate of the dark matter. We obtained the exact solution in the cosmological scale and the approximate gravitational potential i... |
0806.3350 | Wladimir Belayev | W. B. Belayev | Variation of the light-like particle energy and its critical curve
equations | 5 pages, Eq. (1.2) is corrected. arXiv admin note: substantial text
overlap with arXiv:0911.0614 | null | null | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider variation of energy of the light-like particle in Riemann
space-time, find lagrangian, canonical momenta and forces. Equations of the
critical curve are obtained by the nonzero energy integral variation in
accordance with principles of the calculus of variations in mechanics. This
method is shown to not l... | [
{
"created": "Fri, 20 Jun 2008 12:32:13 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Sep 2011 13:16:13 GMT",
"version": "v10"
},
{
"created": "Fri, 6 Jan 2012 12:26:35 GMT",
"version": "v11"
},
{
"created": "Sun, 22 Jun 2008 07:37:00 GMT",
"version": "v2"
},
{
"... | 2012-01-09 | [
[
"Belayev",
"W. B.",
""
]
] | We consider variation of energy of the light-like particle in Riemann space-time, find lagrangian, canonical momenta and forces. Equations of the critical curve are obtained by the nonzero energy integral variation in accordance with principles of the calculus of variations in mechanics. This method is shown to not lea... |
gr-qc/0202049 | Amir H. Abbassi | Amir H. Abbassi & Amir M. Abbassi | Relational Relativity | 12 pages, no figure,published version | Apeiron,Vol.9,No.2,(April 2002)44-61 pp | null | null | gr-qc | null | According to a simple model of inertia a Machianized theory of special and
general relativity named as relational relativity is presented.
| [
{
"created": "Thu, 14 Feb 2002 14:12:27 GMT",
"version": "v1"
},
{
"created": "Thu, 16 May 2002 09:34:26 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Abbassi",
"Amir H.",
""
],
[
"Abbassi",
"Amir M.",
""
]
] | According to a simple model of inertia a Machianized theory of special and general relativity named as relational relativity is presented. |
2105.10779 | Mert Mangut | Mert Mangut, Huriye G\"ursel and \.Izzet Sakall{\i} | Gravitational Lensing in Kerr-Newman Anti de Sitter Spacetime | null | Astroparticle Physics 30 July 2022 | 10.1016/j.astropartphys.2022.102763 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The method of Rindler and Ishak enables one to study how light is bent in the
vicinity of a non-rotating and spherically symmetric gravitational lens. This
method mainly aims to investigate the role of cosmological constant in the
consequent path. In this paper, we use the extension of Rindler-Ishak method
(RIM) in o... | [
{
"created": "Sat, 22 May 2021 18:00:59 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Aug 2022 09:12:42 GMT",
"version": "v2"
}
] | 2022-08-08 | [
[
"Mangut",
"Mert",
""
],
[
"Gürsel",
"Huriye",
""
],
[
"Sakallı",
"İzzet",
""
]
] | The method of Rindler and Ishak enables one to study how light is bent in the vicinity of a non-rotating and spherically symmetric gravitational lens. This method mainly aims to investigate the role of cosmological constant in the consequent path. In this paper, we use the extension of Rindler-Ishak method (RIM) in ord... |
2009.03992 | J\"org Hennig | J\"org Hennig | Axis potentials for stationary $n$-black-hole configurations | 9 pages, 1 figure, accepted for publication in Class. Quantum Grav | Class. Quantum Grav. 37, 19LT01 (2020) | 10.1088/1361-6382/abb116 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend earlier discussions of the balance problem for two black holes and
study stationary spacetimes containing an arbitrary number of $n$ aligned
rotating and (possibly) charged black holes. For these hypothetical equilibrium
configurations, we obtain the most general form of the boundary data on the
symmetry ax... | [
{
"created": "Tue, 8 Sep 2020 20:53:43 GMT",
"version": "v1"
}
] | 2020-09-21 | [
[
"Hennig",
"Jörg",
""
]
] | We extend earlier discussions of the balance problem for two black holes and study stationary spacetimes containing an arbitrary number of $n$ aligned rotating and (possibly) charged black holes. For these hypothetical equilibrium configurations, we obtain the most general form of the boundary data on the symmetry axis... |
2102.05039 | Claudio Nassif Cruz | Cl\'audio Nassif (retired professor) and A. C. Amaro de Faria Jr | Variation of the fundamental constants over the cosmological time:
veracity of Dirac's intriguing hypothesis | 6 pages, 2 figures. arXiv admin note: substantial text overlap with
arXiv:1211.1936, arXiv:2009.05397, arXiv:1205.2298 | Canadian Journal of Physics, Vol.94, n.1 (2016) | 10.1139/cjp-2015-0515 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate how the universal constants, including the fine structure
constant, have varied since the early universe close to the Planck energy scale
($E_P\sim 10^{19}$GeV) and, thus, how they have evoluted over the cosmological
time related to the temperature of the expanding universe. We have already
shown that ... | [
{
"created": "Tue, 9 Feb 2021 01:30:36 GMT",
"version": "v1"
}
] | 2021-02-11 | [
[
"Nassif",
"Cláudio",
"",
"retired professor"
],
[
"Faria",
"A. C. Amaro de",
"Jr"
]
] | We investigate how the universal constants, including the fine structure constant, have varied since the early universe close to the Planck energy scale ($E_P\sim 10^{19}$GeV) and, thus, how they have evoluted over the cosmological time related to the temperature of the expanding universe. We have already shown that th... |
1211.0380 | Naoki Tsukamoto | Naoki Tsukamoto and Tomohiro Harada | Signed magnification sums for general spherical lenses | 14 pages, 4 figures, minor changes from v1 | Phys. Rev. D 87:024024, 2013 | 10.1103/PhysRevD.87.024024 | RUP-12-11 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that the sum of signed magnifications is invariant for mass
lens systems. In this paper, we discuss the signed magnification sums of
general spherical lens models including the singular isothermal sphere, the
Schwarzschild lens and the Ellis wormhole, the last of which is an example of
the traversabl... | [
{
"created": "Fri, 2 Nov 2012 07:06:22 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Dec 2012 07:04:59 GMT",
"version": "v2"
}
] | 2013-01-15 | [
[
"Tsukamoto",
"Naoki",
""
],
[
"Harada",
"Tomohiro",
""
]
] | It is well known that the sum of signed magnifications is invariant for mass lens systems. In this paper, we discuss the signed magnification sums of general spherical lens models including the singular isothermal sphere, the Schwarzschild lens and the Ellis wormhole, the last of which is an example of the traversable ... |
gr-qc/0209012 | Scott A. Hughes | Scott A. Hughes | Tuning gravitational-wave detector networks to measure compact binary
mergers | 15 pages, 6 figures, submitted to PRD | Phys.Rev. D66 (2002) 102001 | 10.1103/PhysRevD.66.102001 | null | gr-qc astro-ph | null | Gravitational waves generated by the final merger of compact binary systems
depend on the structure of the binary's members. If the binary contains neutron
stars, measuring such waves can teach us about the properties of matter at
extreme densities. Unfortunately, these waves are typically at high frequency
where the... | [
{
"created": "Wed, 4 Sep 2002 01:24:56 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Hughes",
"Scott A.",
""
]
] | Gravitational waves generated by the final merger of compact binary systems depend on the structure of the binary's members. If the binary contains neutron stars, measuring such waves can teach us about the properties of matter at extreme densities. Unfortunately, these waves are typically at high frequency where the s... |
gr-qc/0702119 | Nivaldo Agostinho Lemos | N. A. Lemos, G. A. Monerat, E. V. Corr\^ea Silva, G. Oliveira-Neto and
L. G. Ferreira Filho | Reply to "Comment on 'Quantization of FRW spacetimes in the presence of
a cosmological constant and radiation'" | 4 pages, accepted by Physical Review D | Phys.Rev.D75:068504,2007 | 10.1103/PhysRevD.75.068504 | null | gr-qc astro-ph hep-th | null | The Comment by Amore {\it et al.} [gr-qc/0611029] contains a valid criticism
of the numerical precision of the results reported in a recent paper of ours
[Phys. Rev. D {\bf 73}, 044022 (2006)], as well as fresh ideas on how to
characterize a quantum cosmological singularity. However, we argue that,
contrary to what i... | [
{
"created": "Thu, 22 Feb 2007 11:29:11 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Lemos",
"N. A.",
""
],
[
"Monerat",
"G. A.",
""
],
[
"Silva",
"E. V. Corrêa",
""
],
[
"Oliveira-Neto",
"G.",
""
],
[
"Filho",
"L. G. Ferreira",
""
]
] | The Comment by Amore {\it et al.} [gr-qc/0611029] contains a valid criticism of the numerical precision of the results reported in a recent paper of ours [Phys. Rev. D {\bf 73}, 044022 (2006)], as well as fresh ideas on how to characterize a quantum cosmological singularity. However, we argue that, contrary to what is ... |
1101.1012 | Gamal G.L. Nashed | G.G.L. Nashed | Gravitational radiation fields in teleparallel equivalent of general
relativity and their energies | Latex 12 pages | Chin.Phys.B19:110402,2010 | 10.1088/1674-1056/19/11/110402 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive two new retarded solutions in the teleparallel theory equivalent to
general relativity (TEGR). One of these solutions gives a divergent energy.
Therefore, we used the regularized expression of the gravitational
energy-momentum tensor, which is a coordinate dependent. A detailed analysis of
the loss of the m... | [
{
"created": "Wed, 5 Jan 2011 15:51:01 GMT",
"version": "v1"
}
] | 2011-04-21 | [
[
"Nashed",
"G. G. L.",
""
]
] | We derive two new retarded solutions in the teleparallel theory equivalent to general relativity (TEGR). One of these solutions gives a divergent energy. Therefore, we used the regularized expression of the gravitational energy-momentum tensor, which is a coordinate dependent. A detailed analysis of the loss of the mas... |
1307.1520 | Narayan Banerjee | Narayan Banerjee and Somasri Sen | Towards a characterization of fields leading to black hole hair | 7 pages, no figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work, it is shown that an asymptotically flat spherical black
hole can have a nontrivial signature of any field for an exterior observer if
the energy momentum tensor of the corresponding field is either tracefree or if
the trace falls off at least as rapidly as inverse cube of the radial distance.
In ... | [
{
"created": "Fri, 5 Jul 2013 04:54:45 GMT",
"version": "v1"
}
] | 2013-07-08 | [
[
"Banerjee",
"Narayan",
""
],
[
"Sen",
"Somasri",
""
]
] | In the present work, it is shown that an asymptotically flat spherical black hole can have a nontrivial signature of any field for an exterior observer if the energy momentum tensor of the corresponding field is either tracefree or if the trace falls off at least as rapidly as inverse cube of the radial distance. In th... |
1812.02278 | Elena Giorgi | Elena Giorgi | Boundedness and decay for the Teukolsky equation of spin $\pm1$ on
Reissner-Nordstr\"om spacetime: the $\ell=1$ spherical mode | Version accepted for publication in Classical and Quantum Gravity | Class. Quantum Grav. 36 (2019) 205001 | 10.1088/1361-6382/ab3c03 | null | gr-qc math-ph math.AP math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove boundedness and polynomial decay statements for solutions to the
spin $\pm1$ Teukolsky-type equation projected to the $\ell=1$ spherical
harmonic on Reissner-Nordstr\"om spacetime. The equation is verified by a
gauge-invariant quantity which we identify and which involves the
electromagnetic and curvature te... | [
{
"created": "Thu, 6 Dec 2018 00:36:51 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Sep 2019 15:34:39 GMT",
"version": "v2"
}
] | 2019-09-19 | [
[
"Giorgi",
"Elena",
""
]
] | We prove boundedness and polynomial decay statements for solutions to the spin $\pm1$ Teukolsky-type equation projected to the $\ell=1$ spherical harmonic on Reissner-Nordstr\"om spacetime. The equation is verified by a gauge-invariant quantity which we identify and which involves the electromagnetic and curvature tens... |
1605.09586 | Hai-Guang Li | Hai-Guang Li, Yong Cai, and Yun-Song Piao | Towards the bounce inflationary gravitational wave | 19 pages, 12 figures | null | 10.1140/epjc/s10052-016-4554-2 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In bounce inflation scenario, the inflation is singularity-free, while the
advantages of inflation are reserved. We analytically calculate the power
spectrum of its primordial gravitational waves (GWs), and show a universal
result including the physics of the bounce phase. The spectrum acquires a
cutoff at large scal... | [
{
"created": "Tue, 31 May 2016 11:44:36 GMT",
"version": "v1"
}
] | 2017-02-01 | [
[
"Li",
"Hai-Guang",
""
],
[
"Cai",
"Yong",
""
],
[
"Piao",
"Yun-Song",
""
]
] | In bounce inflation scenario, the inflation is singularity-free, while the advantages of inflation are reserved. We analytically calculate the power spectrum of its primordial gravitational waves (GWs), and show a universal result including the physics of the bounce phase. The spectrum acquires a cutoff at large scale,... |
gr-qc/0006100 | Luc Blanchet | Luc Blanchet and Guillaume Faye | Lorentzian regularization and the problem of point-like particles in
general relativity | 34 pages, to appear in J. Math. Phys | J.Math.Phys. 42 (2001) 4391-4418 | 10.1063/1.1384864 | null | gr-qc math-ph math.MP | null | The two purposes of the paper are (1) to present a regularization of the
self-field of point-like particles, based on Hadamard's concept of ``partie
finie'', that permits in principle to maintain the Lorentz covariance of a
relativistic field theory, (2) to use this regularization for defining a model
of stress-energ... | [
{
"created": "Wed, 28 Jun 2000 17:26:44 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Apr 2001 15:50:10 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Blanchet",
"Luc",
""
],
[
"Faye",
"Guillaume",
""
]
] | The two purposes of the paper are (1) to present a regularization of the self-field of point-like particles, based on Hadamard's concept of ``partie finie'', that permits in principle to maintain the Lorentz covariance of a relativistic field theory, (2) to use this regularization for defining a model of stress-energy ... |
gr-qc/0207031 | Hanno Sahlmann | Hanno Sahlmann, Thomas Thiemann | Towards the QFT on Curved Spacetime Limit of QGR. II: A Concrete
Implementation | LaTeX, 49 p., one figure | Class.Quant.Grav.23:909-954,2006 | 10.1088/0264-9381/23/3/020 | AEI-2002-050 | gr-qc hep-th math-ph math.MP quant-ph | null | The present paper is the companion of [1] in which we proposed a scheme that
tries to derive the Quantum Field Theory (QFT) on Curved Spacetimes (CST) limit
from background independent Quantum General Relativity (QGR). The constructions
of [1] make heavy use of the notion of semiclassical states for QGR. In the
prese... | [
{
"created": "Fri, 5 Jul 2002 13:59:50 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Sahlmann",
"Hanno",
""
],
[
"Thiemann",
"Thomas",
""
]
] | The present paper is the companion of [1] in which we proposed a scheme that tries to derive the Quantum Field Theory (QFT) on Curved Spacetimes (CST) limit from background independent Quantum General Relativity (QGR). The constructions of [1] make heavy use of the notion of semiclassical states for QGR. In the present... |
gr-qc/9806001 | Dmitri Vassilevich | S.Yu. Alexandrov, D.V. Vassilevich | Path integral for the Hilbert-Palatini and Ashtekar gravity | Revtex, 16 pages | Phys.Rev. D58 (1998) 124029 | 10.1103/PhysRevD.58.124029 | SPb-IP-98 | gr-qc | null | To write down a path integral for the Ashtekar gravity one must solve three
fundamental problems. First, one must understand rules of complex contour
functional integration with holomorphic action. Second, one should find which
gauges are compatible with reality conditions. Third, one should evaluate the
Faddeev-Popo... | [
{
"created": "Sat, 30 May 1998 11:28:56 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Alexandrov",
"S. Yu.",
""
],
[
"Vassilevich",
"D. V.",
""
]
] | To write down a path integral for the Ashtekar gravity one must solve three fundamental problems. First, one must understand rules of complex contour functional integration with holomorphic action. Second, one should find which gauges are compatible with reality conditions. Third, one should evaluate the Faddeev-Popov ... |
2304.04444 | Moritz Reintjes | Moritz Reintjes | Strong Cosmic Censorship with Bounded Curvature | null | null | null | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we propose a weaker version of Penrose's much heeded Strong
Cosmic Censorship (SCC) conjecture, asserting inextentability of maximal Cauchy
developments by manifolds with Lipschitz continuous Lorentzian metrics and
Riemann curvature bounded in $L^p$. Lipschitz continuity is the threshold
regularity for ... | [
{
"created": "Mon, 10 Apr 2023 08:12:46 GMT",
"version": "v1"
}
] | 2023-04-11 | [
[
"Reintjes",
"Moritz",
""
]
] | In this paper we propose a weaker version of Penrose's much heeded Strong Cosmic Censorship (SCC) conjecture, asserting inextentability of maximal Cauchy developments by manifolds with Lipschitz continuous Lorentzian metrics and Riemann curvature bounded in $L^p$. Lipschitz continuity is the threshold regularity for ca... |
gr-qc/0410038 | Jian-Yang Zhu | Jian-Yang Zhu | A dynamical evolution model on the black hole horizon | Accepted for publication in Classical and Quantum Gravity | Class.Quant.Grav. 22 (2005) 2671-2678 | 10.1088/0264-9381/22/13/010 | null | gr-qc | null | This paper demonstrates a dynamical evolution model of the black hole (BH)
horizon. The result indicates that a kinetic area-cells model of the BH's
horizon can model the evolution of BH due to the Hawking radiation, and this
area-cell system can be considered as an interacting geometrical particle
system. Thus the e... | [
{
"created": "Fri, 8 Oct 2004 11:54:59 GMT",
"version": "v1"
},
{
"created": "Fri, 13 May 2005 09:36:44 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Zhu",
"Jian-Yang",
""
]
] | This paper demonstrates a dynamical evolution model of the black hole (BH) horizon. The result indicates that a kinetic area-cells model of the BH's horizon can model the evolution of BH due to the Hawking radiation, and this area-cell system can be considered as an interacting geometrical particle system. Thus the evo... |
gr-qc/0108078 | Claudio Simeone | Claudio Simeone | Global phase time and path integral for the Kantowski--Sachs anisotropic
univers | 11 pages | Gen.Rel.Grav. 32 (2000) 1835-1844 | 10.1023/A:1001936815092 | null | gr-qc | null | The action functional of the anisotropic Kantowski--Sachs cosmological model
is turned into that of an ordinary gauge system. Then a global phase time is
identified for the model by imposing canonical gauge conditions, and the
quantum transition amplitude is obtained by means of the usual path integral
procedure of F... | [
{
"created": "Thu, 30 Aug 2001 20:56:35 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Simeone",
"Claudio",
""
]
] | The action functional of the anisotropic Kantowski--Sachs cosmological model is turned into that of an ordinary gauge system. Then a global phase time is identified for the model by imposing canonical gauge conditions, and the quantum transition amplitude is obtained by means of the usual path integral procedure of Fad... |
1507.00028 | Mariam Bouhmadi-Lopez | Che-Yu Chen, Mariam Bouhmadi-Lopez, Pisin Chen | Modified Eddington-inspired-Born-Infeld Gravity with a Trace Term | 10 pages, 6 figures, RevTex4-1. References added and discussion
extended. Version accepted in EPJC | null | 10.1140/epjc/s10052-016-3879-1 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, a modified Eddington-inspired-Born-Infeld (EiBI) theory with a
pure trace term $g_{\mu\nu}R$ being added to the determinantal action is
analysed from a cosmological point of view. It corresponds to the most general
action constructed from a rank two tensor that contains up to first order terms
in curva... | [
{
"created": "Tue, 30 Jun 2015 20:29:06 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Jul 2015 19:28:17 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Dec 2015 13:02:47 GMT",
"version": "v3"
}
] | 2016-02-17 | [
[
"Chen",
"Che-Yu",
""
],
[
"Bouhmadi-Lopez",
"Mariam",
""
],
[
"Chen",
"Pisin",
""
]
] | In this paper, a modified Eddington-inspired-Born-Infeld (EiBI) theory with a pure trace term $g_{\mu\nu}R$ being added to the determinantal action is analysed from a cosmological point of view. It corresponds to the most general action constructed from a rank two tensor that contains up to first order terms in curvatu... |
1808.08228 | Vijay Varma | Vijay Varma, Mark A. Scheel, and Harald P. Pfeiffer | Comparison of binary black hole initial data sets | Matches PRD version. 17 pages, 10 figures | Phys. Rev. D 98, 104011 (2018) | 10.1103/PhysRevD.98.104011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present improvements to construction of binary black hole initial data
used in SpEC (the Spectral Einstein Code). We introduce new boundary conditions
for the extended conformal thin sandwich elliptic equations that enforce the
excision surfaces to be slightly inside rather than on the apparent horizons,
thus avoi... | [
{
"created": "Fri, 24 Aug 2018 17:59:49 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Nov 2018 22:54:10 GMT",
"version": "v2"
}
] | 2018-11-15 | [
[
"Varma",
"Vijay",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Pfeiffer",
"Harald P.",
""
]
] | We present improvements to construction of binary black hole initial data used in SpEC (the Spectral Einstein Code). We introduce new boundary conditions for the extended conformal thin sandwich elliptic equations that enforce the excision surfaces to be slightly inside rather than on the apparent horizons, thus avoidi... |
1302.3298 | Michael Devin | Michael Devin | Thermodynamics of Time Machines | null | null | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note, a brief review of the consistent state approach to systems
containing closed timelike curves or similar devices is given, and applied to
the well known thermodynamic problem of Maxwell's demon. The 'third party
paradox' for acausal systems is defined and applied to CTC censorship and black
hole evaporat... | [
{
"created": "Fri, 8 Feb 2013 16:58:12 GMT",
"version": "v1"
}
] | 2013-02-15 | [
[
"Devin",
"Michael",
""
]
] | In this note, a brief review of the consistent state approach to systems containing closed timelike curves or similar devices is given, and applied to the well known thermodynamic problem of Maxwell's demon. The 'third party paradox' for acausal systems is defined and applied to CTC censorship and black hole evaporatio... |
1101.1051 | Giovanni Marozzi Dr. | F. Finelli, G. Marozzi, G. P. Vacca, G. Venturi | Backreaction during inflation: a physical gauge invariant formulation | 4 pages. Typos corrected, comment added, version accepted for
publication in Phys. Rev. Lett | Phys.Rev.Lett.106:121304,2011 | 10.1103/PhysRevLett.106.121304 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within a genuinely gauge invariant approach recently developed for the
computation of the cosmological backreaction, we study, in a cosmological
inflationary context and with respect to various observers, the impact of
scalar fluctuations on the space-time dynamics in the long wavelength limit. We
stress that such a ... | [
{
"created": "Wed, 5 Jan 2011 19:17:22 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Feb 2011 19:03:35 GMT",
"version": "v2"
}
] | 2011-04-05 | [
[
"Finelli",
"F.",
""
],
[
"Marozzi",
"G.",
""
],
[
"Vacca",
"G. P.",
""
],
[
"Venturi",
"G.",
""
]
] | Within a genuinely gauge invariant approach recently developed for the computation of the cosmological backreaction, we study, in a cosmological inflationary context and with respect to various observers, the impact of scalar fluctuations on the space-time dynamics in the long wavelength limit. We stress that such a qu... |
gr-qc/0011044 | Hongsu Kim | Hongsu Kim, Chul Hoon Lee, Hyun Kyu Lee (Hanyang Univ., KOREA) | Non-vanishing Magnetic Flux through the Slightly-charged Kerr Black Hole | 33pages, 1 figure, Revtex, some comments added, typos corrected | Phys.Rev. D63 (2001) 064037 | 10.1103/PhysRevD.63.064037 | null | gr-qc astro-ph hep-th | null | In association with the Blanford-Znajek mechanism for rotational energy
extraction from Kerr black holes, it is of some interest to explore how much of
magnetic flux can actually penetrate the horizon at least in idealized
situations. For completely uncharged Kerr hole case, it has been known for some
time that the m... | [
{
"created": "Mon, 13 Nov 2000 07:30:18 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Nov 2000 07:29:47 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Kim",
"Hongsu",
"",
"Hanyang Univ., KOREA"
],
[
"Lee",
"Chul Hoon",
"",
"Hanyang Univ., KOREA"
],
[
"Lee",
"Hyun Kyu",
"",
"Hanyang Univ., KOREA"
]
] | In association with the Blanford-Znajek mechanism for rotational energy extraction from Kerr black holes, it is of some interest to explore how much of magnetic flux can actually penetrate the horizon at least in idealized situations. For completely uncharged Kerr hole case, it has been known for some time that the mag... |
gr-qc/0507007 | Bernd Reimann | Miguel Alcubierre, Alejandro Corichi, Jos\'e A. Gonz\'alez, Dar\'io
N\'u\~nez, Bernd Reimann, Marcelo Salgado | Generalized harmonic spatial coordinates and hyperbolic shift conditions | 18 pages and 12 figures, extensively revised version explaining in
the new Section IV how the shift condition can be made 3-covariant | Phys.Rev.D72:124018,2005 | 10.1103/PhysRevD.72.124018 | AEI-2005-108 | gr-qc | null | We propose a generalization of the condition for harmonic spatial coordinates
analogous to the generalization of the harmonic time slices introduced by Bona
et al., and closely related to dynamic shift conditions recently proposed by
Lindblom and Scheel, and Bona and Palenzuela. These generalized harmonic
spatial coo... | [
{
"created": "Fri, 1 Jul 2005 21:12:34 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Oct 2005 17:53:02 GMT",
"version": "v2"
}
] | 2011-04-21 | [
[
"Alcubierre",
"Miguel",
""
],
[
"Corichi",
"Alejandro",
""
],
[
"González",
"José A.",
""
],
[
"Núñez",
"Darío",
""
],
[
"Reimann",
"Bernd",
""
],
[
"Salgado",
"Marcelo",
""
]
] | We propose a generalization of the condition for harmonic spatial coordinates analogous to the generalization of the harmonic time slices introduced by Bona et al., and closely related to dynamic shift conditions recently proposed by Lindblom and Scheel, and Bona and Palenzuela. These generalized harmonic spatial coord... |
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