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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2107.07036 | N\'estor Ortiz | Raissa F. P. Mendes, N\'estor Ortiz, Nikolaos Stergioulas | Nonlinear dynamics of oscillating neutron stars in scalar-tensor gravity | 22 pages, 21 figures, 1 table. Updated references, four references
added, typos corrected, thicker lines in some plots. Matches published
version | Phys. Rev. D 104, 104036 (2021) | 10.1103/PhysRevD.104.104036 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spectrum of oscillating compact objects can be considerably altered in
alternative theories of gravity. In particular, it may be enriched by modes
with no counterpart in general relativity, tied to the dynamics of additional
degrees of freedom generically present in these theories. Detection of these
modes, e.g. ... | [
{
"created": "Wed, 14 Jul 2021 23:16:44 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Jan 2022 03:15:48 GMT",
"version": "v2"
}
] | 2022-01-21 | [
[
"Mendes",
"Raissa F. P.",
""
],
[
"Ortiz",
"Néstor",
""
],
[
"Stergioulas",
"Nikolaos",
""
]
] | The spectrum of oscillating compact objects can be considerably altered in alternative theories of gravity. In particular, it may be enriched by modes with no counterpart in general relativity, tied to the dynamics of additional degrees of freedom generically present in these theories. Detection of these modes, e.g. in... |
1801.02366 | Alessandro Nagar | Francesco Messina, Alberto Maldarella, and Alessandro Nagar | Factorization and resummation: A new paradigm to improve gravitational
wave amplitudes. II: the higher multipolar modes | 22 pages, 5 figures, submitted to Phys. Rev. D | Phys. Rev. D 97, 084016 (2018) | 10.1103/PhysRevD.97.084016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The factorization and resummation approach of Nagar and Shah~[Phys.~Rev.~D~94
(2016), 104017], designed to improve the strong-field behavior of the
post-Newtonian (PN) residual waveform amplitudes $f_{\ell m}$'s entering the
effective-one-body, circularized, gravitational waveform for spinning
coalescing binaries, is... | [
{
"created": "Mon, 8 Jan 2018 10:14:10 GMT",
"version": "v1"
}
] | 2018-04-18 | [
[
"Messina",
"Francesco",
""
],
[
"Maldarella",
"Alberto",
""
],
[
"Nagar",
"Alessandro",
""
]
] | The factorization and resummation approach of Nagar and Shah~[Phys.~Rev.~D~94 (2016), 104017], designed to improve the strong-field behavior of the post-Newtonian (PN) residual waveform amplitudes $f_{\ell m}$'s entering the effective-one-body, circularized, gravitational waveform for spinning coalescing binaries, is h... |
2202.04665 | Matteo Piani | Matteo Piani and Javier Rubio | Higgs-Dilaton Inflation in Einstein-Cartan gravity | 25 pages, 9 figures v2: this version matches the on in JCAP | null | 10.1088/1475-7516/2022/05/009 | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | We study the phenomenology of the Higgs-Dilaton model in the context of
Einstein-Cartan gravity, focusing on the separate impact of the Holst and
Nieh-Yan terms on the inflationary observables. Using analytical and numerical
techniques, we show the predictions of these scenarios to display an
attractor-like behaviour... | [
{
"created": "Wed, 9 Feb 2022 19:00:02 GMT",
"version": "v1"
},
{
"created": "Tue, 17 May 2022 17:10:43 GMT",
"version": "v2"
}
] | 2022-05-18 | [
[
"Piani",
"Matteo",
""
],
[
"Rubio",
"Javier",
""
]
] | We study the phenomenology of the Higgs-Dilaton model in the context of Einstein-Cartan gravity, focusing on the separate impact of the Holst and Nieh-Yan terms on the inflationary observables. Using analytical and numerical techniques, we show the predictions of these scenarios to display an attractor-like behaviour i... |
2012.05850 | Spiros Cotsakis | Spiros Cotsakis, Dimitrios Trachilis | The radiation instability in modified gravity | v2: 34 pages, references added, version to match the published one | Int. J. Mod. Phys. A36 (2021) 2150060 | 10.1142/S0217751X21500603 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the problem of the instability of inhomogeneous radiation universes
in quadratic lagrangian theories of gravity written as a system of evolution
equations with constraints. We construct formal series expansions and show that
the resulting solutions have a smaller number of arbitrary functions than that
requi... | [
{
"created": "Thu, 10 Dec 2020 17:44:25 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Mar 2021 08:52:01 GMT",
"version": "v2"
}
] | 2021-04-21 | [
[
"Cotsakis",
"Spiros",
""
],
[
"Trachilis",
"Dimitrios",
""
]
] | We study the problem of the instability of inhomogeneous radiation universes in quadratic lagrangian theories of gravity written as a system of evolution equations with constraints. We construct formal series expansions and show that the resulting solutions have a smaller number of arbitrary functions than that require... |
1907.13565 | Michael Zantedeschi | Michael Zantedeschi | On the viability of Locked Inflation | 4 pages, 1 figure, v.2 references updated | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review locked inflation and we critically address phenomenological and
consistency issues thathave appeared in the literature. A natural window of
opportunity is found for the original scenario.Moreover, a simple way to
enlarge the parameter space is proposed by considering an equivalentlynatural
structure for the... | [
{
"created": "Wed, 31 Jul 2019 15:46:54 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Jan 2020 17:08:57 GMT",
"version": "v2"
}
] | 2020-01-30 | [
[
"Zantedeschi",
"Michael",
""
]
] | We review locked inflation and we critically address phenomenological and consistency issues thathave appeared in the literature. A natural window of opportunity is found for the original scenario.Moreover, a simple way to enlarge the parameter space is proposed by considering an equivalentlynatural structure for the l... |
0809.3838 | Janna Levin | Janna Levin and Becky Grossman | Dynamics of Black Hole Pairs I: Periodic Tables | 19 pages, lots of figures | Phys.Rev.D79:043016,2009 | 10.1103/PhysRevD.79.043016 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Although the orbits of comparable mass, spinning black holes seem to defy
simple decoding, we find a means to decipher all such orbits. The dynamics is
complicated by extreme perihelion precession compounded by spin-induced
precession. We are able to quantitatively define and describe the fully three
dimensional moti... | [
{
"created": "Tue, 23 Sep 2008 01:56:05 GMT",
"version": "v1"
}
] | 2009-03-12 | [
[
"Levin",
"Janna",
""
],
[
"Grossman",
"Becky",
""
]
] | Although the orbits of comparable mass, spinning black holes seem to defy simple decoding, we find a means to decipher all such orbits. The dynamics is complicated by extreme perihelion precession compounded by spin-induced precession. We are able to quantitatively define and describe the fully three dimensional motion... |
1512.05922 | Nistor Nicolaevici | Nistor Nicolaevici | Gauge dependence in QED amplitudes in expanding de Sitter space | 19 pages, 1 figure | null | 10.1142/S0217751X16500500 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider first order transition amplitudes in external fields in QED in
the expanding de Sitter space and point out that they are gauge dependent
quantities. We examine the gauge variations of the amplitudes assuming a
decoupling of the interaction at large times, which allows to conclude that the
source of the pr... | [
{
"created": "Fri, 18 Dec 2015 12:21:15 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Feb 2016 13:06:25 GMT",
"version": "v2"
}
] | 2016-04-20 | [
[
"Nicolaevici",
"Nistor",
""
]
] | We consider first order transition amplitudes in external fields in QED in the expanding de Sitter space and point out that they are gauge dependent quantities. We examine the gauge variations of the amplitudes assuming a decoupling of the interaction at large times, which allows to conclude that the source of the prob... |
2202.00086 | Fabio Duvan Lora Clavijo Mr. | Vel\'asquez-Cadavid J.M., Arrieta-Villamizar J.A., F.D. Lora-Clavijo,
O.M. Pimentel, Osorio-Vargas J.E | OSIRIS: A New Code for Ray Tracing Around Compact Objects | 13 pages, 13 figures, accepted for publication in The European
Physical Journal C | null | null | null | gr-qc astro-ph.HE physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The radiation observed in quasars and active galactic nuclei is mainly
produced by a relativistic plasma orbiting close to the black hole event
horizon, where strong gravitational effects are relevant. The observational
data of such systems can be compared with theoretical models to infer the black
hole and plasma pr... | [
{
"created": "Mon, 31 Jan 2022 20:53:23 GMT",
"version": "v1"
}
] | 2022-02-02 | [
[
"M.",
"Velásquez-Cadavid J.",
""
],
[
"A.",
"Arrieta-Villamizar J.",
""
],
[
"Lora-Clavijo",
"F. D.",
""
],
[
"Pimentel",
"O. M.",
""
],
[
"E",
"Osorio-Vargas J.",
""
]
] | The radiation observed in quasars and active galactic nuclei is mainly produced by a relativistic plasma orbiting close to the black hole event horizon, where strong gravitational effects are relevant. The observational data of such systems can be compared with theoretical models to infer the black hole and plasma prop... |
1610.09864 | Daniel R Terno | Valentina Baccetti, Viqar Husain, Daniel R. Terno | The information recovery problem | 7 pages +1 fig Published version | Entropy 19, 17 (2017) | 10.3390/e19010017 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The issue of unitary evolution during creation and evaporation of a black
hole remains controversial. We~argue that some prominent cures are more
troubling than the disease, demonstrate that their central element---forming of
the event horizon before the evaporation begins---is not necessarily true, and
describe a fu... | [
{
"created": "Mon, 31 Oct 2016 11:03:25 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Jan 2017 15:03:24 GMT",
"version": "v2"
}
] | 2017-01-19 | [
[
"Baccetti",
"Valentina",
""
],
[
"Husain",
"Viqar",
""
],
[
"Terno",
"Daniel R.",
""
]
] | The issue of unitary evolution during creation and evaporation of a black hole remains controversial. We~argue that some prominent cures are more troubling than the disease, demonstrate that their central element---forming of the event horizon before the evaporation begins---is not necessarily true, and describe a full... |
1806.08199 | Denitsa Staicova | Denitsa Staicova and Michail Stoilov | Cosmological Solutions from a Multi-Measure Model with Inflaton Field | 11 pages, 4 figures, new figures and comments added. Final version
published in Symmetry | Symmetry 2019, 11(11), 1387 | 10.3390/sym11111387 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent work, we demonstrated that a modified gravity model in which a
scalar "darkon" field is coupled to both the standard Riemannian metric and to
another non-Riemannian volume form is compatible with observational data from
Supernovae Type Ia. Here, we investigate a more complicated model with an
additional "... | [
{
"created": "Thu, 21 Jun 2018 12:28:56 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Nov 2019 13:33:46 GMT",
"version": "v2"
}
] | 2019-11-12 | [
[
"Staicova",
"Denitsa",
""
],
[
"Stoilov",
"Michail",
""
]
] | In a recent work, we demonstrated that a modified gravity model in which a scalar "darkon" field is coupled to both the standard Riemannian metric and to another non-Riemannian volume form is compatible with observational data from Supernovae Type Ia. Here, we investigate a more complicated model with an additional "in... |
1701.02029 | Vladimir Ivashchuk | M.E. Abishev, K.A. Boshkayev and V.D. Ivashchuk | Dilatonic dyon-like black hole solutions in the model with two Abelian
gauge fields | 23 pages, Latex, 2 figures, corrected revised version: several
paragraphs, remarks, equations and 5 references are added, ref. [13] is
replaced. To appear in EPJC. arXiv admin note: substantial text overlap with
arXiv:1504.07657 | null | 10.1140/epjc/s10052-017-4749-1 | IGC-RUDN-2017-01/01-cor2 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dilatonic black hole dyon-like solutions in the gravitational $4d$ model with
a scalar field, two 2-forms, two dilatonic coupling constants $\lambda_i \neq
0$, $i =1,2$, obeying $\lambda_1 \neq - \lambda_2$ and the sign parameter
$\varepsilon = \pm 1$ for scalar field kinetic term are considered. Here
$\varepsilon = ... | [
{
"created": "Sun, 8 Jan 2017 22:32:31 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Feb 2017 10:04:57 GMT",
"version": "v2"
},
{
"created": "Fri, 24 Mar 2017 15:13:22 GMT",
"version": "v3"
}
] | 2017-04-26 | [
[
"Abishev",
"M. E.",
""
],
[
"Boshkayev",
"K. A.",
""
],
[
"Ivashchuk",
"V. D.",
""
]
] | Dilatonic black hole dyon-like solutions in the gravitational $4d$ model with a scalar field, two 2-forms, two dilatonic coupling constants $\lambda_i \neq 0$, $i =1,2$, obeying $\lambda_1 \neq - \lambda_2$ and the sign parameter $\varepsilon = \pm 1$ for scalar field kinetic term are considered. Here $\varepsilon = - ... |
0704.2731 | Hideki Maeda | Hideki Maeda | Global structure and physical interpretation of the Fonarev solution for
a scalar field with exponential potential | 4 pages, 1 figure, revised version with title changed. The solution
was obtained by Fonarev in 1995 | null | null | CECS-PHY-07/06 | gr-qc hep-th | null | We discuss the physical interpretation of a dynamical and inhomogeneous
spherically symmetric solution obtained by Fonarev for a scalar field with an
exponential potential. There is a single parameter $w$ in the solution which
can be set to $\pm1$ if it is non-zero, in addition to the steepness parameter
$\lambda$ in... | [
{
"created": "Fri, 20 Apr 2007 15:46:28 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Apr 2007 15:38:46 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Maeda",
"Hideki",
""
]
] | We discuss the physical interpretation of a dynamical and inhomogeneous spherically symmetric solution obtained by Fonarev for a scalar field with an exponential potential. There is a single parameter $w$ in the solution which can be set to $\pm1$ if it is non-zero, in addition to the steepness parameter $\lambda$ in t... |
gr-qc/9512029 | null | Thomas G. Philbin | Perfect-fluid cylinders and walls - sources for the Levi-Civita
space-time | 22 pages, LaTeX, one included figure. Revised version: three
(non-perfect-fluid) interior solutions are added, one of which falsifies the
original conjecture in Sec. 4, and the circular geodesics of the Levi-Civita
space-time are discussed in a footnote | Class.Quant.Grav. 13 (1996) 1217-1232 | 10.1088/0264-9381/13/5/032 | null | gr-qc | null | The diagonal metric tensor whose components are functions of one spatial
coordinate is considered. Einstein's field equations for a perfect-fluid source
are reduced to quadratures once a generating function, equal to the product of
two of the metric components, is chosen. The solutions are either static fluid
cylinde... | [
{
"created": "Thu, 14 Dec 1995 18:30:43 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Feb 1996 15:09:08 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Philbin",
"Thomas G.",
""
]
] | The diagonal metric tensor whose components are functions of one spatial coordinate is considered. Einstein's field equations for a perfect-fluid source are reduced to quadratures once a generating function, equal to the product of two of the metric components, is chosen. The solutions are either static fluid cylinders... |
gr-qc/9909021 | Jorge Pullin | Jorge Pullin | The close limit of colliding black holes: an update | LaTeX with PTP macros, 8 figures, 14 pages | Prog.Theor.Phys.Suppl.136:107-120,1999 | 10.1143/PTPS.136.107 | CGPG-99-9-1 | gr-qc | null | This is the writeup of the talk I gave at the Yukawa International Symposium
at Kyoto, Japan on June 29, 1999. The talk summarizes the present status of the
close limit approximation for colliding black holes.
| [
{
"created": "Tue, 7 Sep 1999 02:28:46 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Pullin",
"Jorge",
""
]
] | This is the writeup of the talk I gave at the Yukawa International Symposium at Kyoto, Japan on June 29, 1999. The talk summarizes the present status of the close limit approximation for colliding black holes. |
2407.03683 | Ruslan Muharlyamov | Ruslan K. Muharlyamov, Tatiana N. Pankratyeva, Shehabaldeen O.A.
Bashir | Exact cosmological solutions with magnetic field in the theory of
gravity with non-minimal kinetic coupling | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | We investigate anisotropic and homogeneous cosmological models in the
scalar-tensor theory of gravity with non-minimal kinetic coupling of a scalar
field to the curvature given by the function $\eta\cdot(\phi/2)\cdot
G_{\mu\nu}\,\nabla^\mu \nabla^\nu \phi$ in the Lagrangian. We assume that the
space-times are filled ... | [
{
"created": "Thu, 4 Jul 2024 07:10:33 GMT",
"version": "v1"
}
] | 2024-07-08 | [
[
"Muharlyamov",
"Ruslan K.",
""
],
[
"Pankratyeva",
"Tatiana N.",
""
],
[
"Bashir",
"Shehabaldeen O. A.",
""
]
] | We investigate anisotropic and homogeneous cosmological models in the scalar-tensor theory of gravity with non-minimal kinetic coupling of a scalar field to the curvature given by the function $\eta\cdot(\phi/2)\cdot G_{\mu\nu}\,\nabla^\mu \nabla^\nu \phi$ in the Lagrangian. We assume that the space-times are filled a ... |
gr-qc/9912106 | R. G. Viswakarma | R. G. Vishwakarma | A dark energy model resulting from a Ricci symmetry revisited | Replaced with published version (title changed) | NuovoCim.B122:113-121,2007 | 10.1393/ncb/i2007-10053-0 | null | gr-qc | null | Observations of supernovae of type Ia require dark energy (some unknown
exotic \emph{`matter'} of negative pressure) to explain their unexpected
faintness. Whereas the simplest and most favoured candidate of dark energy, the
Einsteinian cosmological constant, is about 120 orders of magnitude smaller
than the theoreti... | [
{
"created": "Sat, 25 Dec 1999 06:41:46 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Jan 2008 21:42:59 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Vishwakarma",
"R. G.",
""
]
] | Observations of supernovae of type Ia require dark energy (some unknown exotic \emph{`matter'} of negative pressure) to explain their unexpected faintness. Whereas the simplest and most favoured candidate of dark energy, the Einsteinian cosmological constant, is about 120 orders of magnitude smaller than the theoretica... |
1409.3231 | Jose' P. S. Lemos | Jos\'e P. S. Lemos, Paulo Luz | Newtonian wormholes | 28 pages, 5 figures. Accepted for publication in General Relativity
and Gravitation | Gen. Relativ. Gravit. 46, 1803 (2014) | 10.1007/s10714-014-1803-2 | null | gr-qc astro-ph.SR hep-th physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A wormhole solution in Newtonian gravitation, enhanced through an equation
relating the Ricci scalar to the mass density, is presented. The wormhole
inhabits a spherically symmetric curved space, with one throat and two
asymptotically flat regions. Particle dynamics in this geometry is studied, and
the three distinct... | [
{
"created": "Wed, 10 Sep 2014 20:00:17 GMT",
"version": "v1"
}
] | 2016-03-24 | [
[
"Lemos",
"José P. S.",
""
],
[
"Luz",
"Paulo",
""
]
] | A wormhole solution in Newtonian gravitation, enhanced through an equation relating the Ricci scalar to the mass density, is presented. The wormhole inhabits a spherically symmetric curved space, with one throat and two asymptotically flat regions. Particle dynamics in this geometry is studied, and the three distinct d... |
gr-qc/0209028 | Rafael Ferraro | Rafael Ferraro | The equivalence principle and the bending of light | 7 pages, 1 figure, to be published in American Journal of Physics | Am.J.Phys. 71 (2003) 168-170 | 10.1119/1.1517597 | null | gr-qc astro-ph | null | The apparent discrepancy between the bending of light predicted by the
equivalence principle and its corresponding value in general relativity is
resolved by evaluating the deflection of light with respect to a direction that
is parallel transported along the ray trajectory in 3-space. In this way the
bending predict... | [
{
"created": "Mon, 9 Sep 2002 12:51:41 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Ferraro",
"Rafael",
""
]
] | The apparent discrepancy between the bending of light predicted by the equivalence principle and its corresponding value in general relativity is resolved by evaluating the deflection of light with respect to a direction that is parallel transported along the ray trajectory in 3-space. In this way the bending predicted... |
gr-qc/0501040 | Vitaly Vanchurin | Vitaly Vanchurin, Ken Olum and Alexander Vilenkin | Cosmic string scaling in flat space | 13 pages,7 figures | Phys.Rev. D72 (2005) 063514 | 10.1103/PhysRevD.72.063514 | null | gr-qc hep-ph hep-th | null | We investigate the evolution of infinite strings as a part of a complete
cosmic string network in flat space. We perform a simulation of the network
which uses functional forms for the string position and thus is exact to the
limits of computer arithmetic. Our results confirm that the wiggles on the
strings obey a sc... | [
{
"created": "Wed, 12 Jan 2005 18:01:36 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Feb 2005 22:51:56 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Aug 2005 21:22:27 GMT",
"version": "v3"
}
] | 2013-05-29 | [
[
"Vanchurin",
"Vitaly",
""
],
[
"Olum",
"Ken",
""
],
[
"Vilenkin",
"Alexander",
""
]
] | We investigate the evolution of infinite strings as a part of a complete cosmic string network in flat space. We perform a simulation of the network which uses functional forms for the string position and thus is exact to the limits of computer arithmetic. Our results confirm that the wiggles on the strings obey a scal... |
1607.03797 | Llu\'is Bel | Llu\'is Bel | Bi-connected Gravity Fields | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I describe a bi-connection formalism of General relativity based on the dual
role of the Weitzenb\"{o}ck connection defining the parallelism at a distance
and the concomitant Levi-Civita connection derived from the Riemannian metric.
A more explicit tensor writing of the geodesic and loxodromic equations
clarifies th... | [
{
"created": "Mon, 11 Jul 2016 06:55:18 GMT",
"version": "v1"
}
] | 2016-07-14 | [
[
"Bel",
"Lluís",
""
]
] | I describe a bi-connection formalism of General relativity based on the dual role of the Weitzenb\"{o}ck connection defining the parallelism at a distance and the concomitant Levi-Civita connection derived from the Riemannian metric. A more explicit tensor writing of the geodesic and loxodromic equations clarifies thei... |
0903.5438 | Sean A. Hayward | Sean A. Hayward | Wormhole dynamics in spherical symmetry | 5 REVTeX4 pages | Phys.Rev.D79:124001,2009 | 10.1103/PhysRevD.79.124001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A dynamical theory of traversable wormholes is detailed in spherical
symmetry. Generically a wormhole consists of a tunnel of trapped surfaces
between two mouths, defined as temporal outer trapping horizons with opposite
senses, in mutual causal contact. In static cases, the mouths coincide as the
throat of a Morris-... | [
{
"created": "Tue, 31 Mar 2009 11:51:49 GMT",
"version": "v1"
}
] | 2009-06-30 | [
[
"Hayward",
"Sean A.",
""
]
] | A dynamical theory of traversable wormholes is detailed in spherical symmetry. Generically a wormhole consists of a tunnel of trapped surfaces between two mouths, defined as temporal outer trapping horizons with opposite senses, in mutual causal contact. In static cases, the mouths coincide as the throat of a Morris-Th... |
gr-qc/0611099 | Eduardo Ruiz | J. A. Cabezas and E. Ruiz | An approximate global solution to the gravitational field of a perfect
fluid in slow rotation | 11 pages, english version | Actas de los ERE 1987, Publicaciones del IAC, Serie C, No. 6,
1988, 215-230 | null | null | gr-qc | null | Using the Post-Minkowskian formalism and considering rotation as a
perturbation, we compute an approximate interior solution for a stationary
perfect fluid with constant density and axial symmetry. A suitable change of
coordinates allows this metric to be matched to the exterior metric to a
particle with a pole-dipol... | [
{
"created": "Mon, 20 Nov 2006 16:49:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cabezas",
"J. A.",
""
],
[
"Ruiz",
"E.",
""
]
] | Using the Post-Minkowskian formalism and considering rotation as a perturbation, we compute an approximate interior solution for a stationary perfect fluid with constant density and axial symmetry. A suitable change of coordinates allows this metric to be matched to the exterior metric to a particle with a pole-dipole-... |
1910.14305 | Mengjie Wang | Mengjie Wang, Carlos Herdeiro, Jiliang Jing | Charged Dirac perturbations on Reissner-Nordstr\"om-Anti-de Sitter
spacetimes: quasinormal modes with Robin boundary conditions | 15 pages, 6 figures | Phys. Rev. D 100, 124062 (2019) | 10.1103/PhysRevD.100.124062 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study charged Dirac quasinormal modes (QNMs) on
Reissner-Nordstr\"om-Anti-de Sitter (RN-AdS) black holes with generic Robin
boundary conditions, by extending our earlier work of neutral Dirac QNMs on
Schwarzschild-AdS black holes. We first derive the equations of motion for
charged Dirac fields on a RN-AdS backgro... | [
{
"created": "Thu, 31 Oct 2019 08:38:14 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Wang",
"Mengjie",
""
],
[
"Herdeiro",
"Carlos",
""
],
[
"Jing",
"Jiliang",
""
]
] | We study charged Dirac quasinormal modes (QNMs) on Reissner-Nordstr\"om-Anti-de Sitter (RN-AdS) black holes with generic Robin boundary conditions, by extending our earlier work of neutral Dirac QNMs on Schwarzschild-AdS black holes. We first derive the equations of motion for charged Dirac fields on a RN-AdS backgroun... |
2110.06188 | Andrew L. Miller | Andrew L. Miller, Nancy Aggarwal, S\'ebastien Clesse, and Federico De
Lillo | Constraints on planetary and asteroid-mass primordial black holes from
continuous gravitational-wave searches | 8 pages, 4 figures | null | 10.1103/PhysRevD.105.062008 | null | gr-qc astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present new constraints on the merging rates of planetary-mass and
asteroid-mass primordial black hole binaries using limits on continuous
waves(quasi-monochromatic, quasi-infinite duration signals) derived from an
all-sky search for isolated compact objects in the first six months of the
third observing run (O3a)... | [
{
"created": "Tue, 12 Oct 2021 17:37:44 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Mar 2022 02:14:35 GMT",
"version": "v2"
}
] | 2022-04-06 | [
[
"Miller",
"Andrew L.",
""
],
[
"Aggarwal",
"Nancy",
""
],
[
"Clesse",
"Sébastien",
""
],
[
"De Lillo",
"Federico",
""
]
] | We present new constraints on the merging rates of planetary-mass and asteroid-mass primordial black hole binaries using limits on continuous waves(quasi-monochromatic, quasi-infinite duration signals) derived from an all-sky search for isolated compact objects in the first six months of the third observing run (O3a) o... |
1801.06531 | Manuel Hohmann | Manuel Hohmann | Scalar-torsion theories of gravity III: analogue of scalar-tensor
gravity and conformal invariants | 18 pages, no figures | Phys. Rev. D 98, 064004 (2018) | 10.1103/PhysRevD.98.064004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a class of teleparallel scalar-torsion theories of gravity, which
is parametrized by five free functions of the scalar field. The theories are
formulated covariantly using a flat, but non-vanishing spin connection. We show
how the actions of different theories within this class are related via
conformal tr... | [
{
"created": "Fri, 19 Jan 2018 18:49:56 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Feb 2018 18:33:03 GMT",
"version": "v2"
}
] | 2018-09-12 | [
[
"Hohmann",
"Manuel",
""
]
] | We discuss a class of teleparallel scalar-torsion theories of gravity, which is parametrized by five free functions of the scalar field. The theories are formulated covariantly using a flat, but non-vanishing spin connection. We show how the actions of different theories within this class are related via conformal tran... |
1712.04458 | Maciej Maliborski | Maciej Maliborski and Oliver Rinne | Critical phenomena in the general spherically symmetric
Einstein-Yang-Mills system | 15 pages, 15 figures; v2: matches published version | Phys. Rev. D 97, 044053 (2018) | 10.1103/PhysRevD.97.044053 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study critical behavior in gravitational collapse of a general spherically
symmetric Yang-Mills field coupled to the Einstein equations. Unlike the
magnetic ansatz used in previous numerical work, the general Yang-Mills
connection has two degrees of freedom in spherical symmetry. This fact changes
the phenomenolog... | [
{
"created": "Tue, 12 Dec 2017 19:00:06 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Mar 2018 15:10:31 GMT",
"version": "v2"
}
] | 2018-03-21 | [
[
"Maliborski",
"Maciej",
""
],
[
"Rinne",
"Oliver",
""
]
] | We study critical behavior in gravitational collapse of a general spherically symmetric Yang-Mills field coupled to the Einstein equations. Unlike the magnetic ansatz used in previous numerical work, the general Yang-Mills connection has two degrees of freedom in spherical symmetry. This fact changes the phenomenology ... |
2104.10552 | Khalil El Bourakadi | Khalil El Bourakadi | Preheating and Reheating after Standard Inflation | null | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We study the two-phase scenario following inflation, where the initial step
is preheating, accompanied by a step of perturbative reheating at which
inflaton field decays transferring all of its energy to create relativistic
particles, the interaction of these particles will evolve towards a state of
thermal equilibri... | [
{
"created": "Wed, 21 Apr 2021 14:19:07 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Apr 2021 22:29:09 GMT",
"version": "v2"
}
] | 2021-05-03 | [
[
"Bourakadi",
"Khalil El",
""
]
] | We study the two-phase scenario following inflation, where the initial step is preheating, accompanied by a step of perturbative reheating at which inflaton field decays transferring all of its energy to create relativistic particles, the interaction of these particles will evolve towards a state of thermal equilibrium... |
2112.10260 | Torben Frost | Torben C. Frost | Gravitational Lensing in the Charged NUT-de Sitter Spacetime | v2: 41 pages and 16 figures; all figures in very high resolution;
adapted to match publish version (except format and minor details); minor
postprint changes to fix nonessential typos; part of this work is extended to
massive particles in arXiv:2304.12563 | Phys. Rev. D 105, 064064 (2022) | 10.1103/PhysRevD.105.064064 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is a long-standing open question if a gravitomagnetic charge, the
gravitational analogon to a hypothetical magnetic charge in electrodynamics,
exists in nature. It naturally occurs in certain exact solutions to Einstein's
electrovacuum-field equations with cosmological constant. The charged NUT-de
Sitter metric is... | [
{
"created": "Sun, 19 Dec 2021 21:02:50 GMT",
"version": "v1"
},
{
"created": "Sun, 31 Dec 2023 18:41:44 GMT",
"version": "v2"
}
] | 2024-01-02 | [
[
"Frost",
"Torben C.",
""
]
] | It is a long-standing open question if a gravitomagnetic charge, the gravitational analogon to a hypothetical magnetic charge in electrodynamics, exists in nature. It naturally occurs in certain exact solutions to Einstein's electrovacuum-field equations with cosmological constant. The charged NUT-de Sitter metric is s... |
1007.0479 | Saibal Ray | R. K. Tiwari, Farook Rahaman and Saibal Ray | Five Dimensional Cosmological Models in General Relativity | 13 pages, 4 figures, accepted in Int. J. Theor. Phys | Int.J.Theor.Phys.49:2348-2357,2010 | 10.1007/s10773-010-0421-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Five dimensional Kaluza-Klein space-time is considered in the presence of a
perfect fluid source with variable G and $\Lambda$. An expanding universe is
found by using a relation between the metric potential and an equation of
state. The gravitational constant is found to decrease with time as $G \sim
t^{-(1-\omega... | [
{
"created": "Sat, 3 Jul 2010 07:44:44 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Jul 2010 10:26:06 GMT",
"version": "v2"
}
] | 2011-03-07 | [
[
"Tiwari",
"R. K.",
""
],
[
"Rahaman",
"Farook",
""
],
[
"Ray",
"Saibal",
""
]
] | A Five dimensional Kaluza-Klein space-time is considered in the presence of a perfect fluid source with variable G and $\Lambda$. An expanding universe is found by using a relation between the metric potential and an equation of state. The gravitational constant is found to decrease with time as $G \sim t^{-(1-\omega)}... |
2106.05628 | Beatriz Elizaga Navascu\'es | Beatriz Elizaga Navascu\'es, Rafael Jim\'enez-Llamas, and Guillermo A.
Mena Marug\'an | Primordial perturbations in kinetically dominated regimes of general
relativity and hybrid quantum cosmology | 17 pages | Phys. Rev. D 104, 103520 (2021) | 10.1103/PhysRevD.104.103520 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar fields with an energy density dominated by its kinetic part may have
played a relevant role in the very early stages of the Universe. Compared to
the standard inflationary paradigm, they may lead to modifications in
observable quantities, e.g. the anisotropies found in the cosmic microwave
background. Kinetica... | [
{
"created": "Thu, 10 Jun 2021 10:11:54 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Nov 2021 03:57:21 GMT",
"version": "v2"
}
] | 2021-11-23 | [
[
"Navascués",
"Beatriz Elizaga",
""
],
[
"Jiménez-Llamas",
"Rafael",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
]
] | Scalar fields with an energy density dominated by its kinetic part may have played a relevant role in the very early stages of the Universe. Compared to the standard inflationary paradigm, they may lead to modifications in observable quantities, e.g. the anisotropies found in the cosmic microwave background. Kineticall... |
gr-qc/0605073 | Shintaro Sawayama | Shintaro Sawayama | One Local Solution of the Wheeler-DeWitt equation | 6 pages, 1 figure | null | null | null | gr-qc | null | We can obtain one solution of the Hamiltonian constraint equation in the
local sense. The form of the state is suggested from the up-to-down method in
our previous work. The up-to-down method works for different way in treating
the general metrics. In the mini-superspace approach there appears additional
constraint i... | [
{
"created": "Fri, 12 May 2006 04:01:26 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Jul 2006 01:09:35 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Sawayama",
"Shintaro",
""
]
] | We can obtain one solution of the Hamiltonian constraint equation in the local sense. The form of the state is suggested from the up-to-down method in our previous work. The up-to-down method works for different way in treating the general metrics. In the mini-superspace approach there appears additional constraint in ... |
2008.10463 | Arman Stepanian | A. Amekhyan, S. Sargsyan, A. Stepanian | Galactic sparsity and $\Lambda$-gravity | 6 pages, Mod. Phys. Lett. A (in press) | Mod.Phys.Lett, 35, 2050295 (2020) | 10.1142/S0217732320502995 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The sparsity parameter for clusters of galaxies is obtained in the context of
$\Lambda$-gravity. It is shown that, the theoretical estimated values are
within the reported error limits of the measured data. Thus, in the future the
sparsity parameter can serve as an informative new test to detect the
discrepancy betwe... | [
{
"created": "Mon, 24 Aug 2020 14:12:01 GMT",
"version": "v1"
}
] | 2020-12-01 | [
[
"Amekhyan",
"A.",
""
],
[
"Sargsyan",
"S.",
""
],
[
"Stepanian",
"A.",
""
]
] | The sparsity parameter for clusters of galaxies is obtained in the context of $\Lambda$-gravity. It is shown that, the theoretical estimated values are within the reported error limits of the measured data. Thus, in the future the sparsity parameter can serve as an informative new test to detect the discrepancy between... |
1511.07655 | Andronikos Paliathanasis | A. Paliathanasis, K. Krishnakumar and P.G.L. Leach | Comment on "Classification of Cosmic Scale Factor via Noether Gauge
Symmetries" [Int. J. Theor. Phys. 54, 2343 (2015)] | 4 pages, published Int. J. Theor. Phys | null | 10.1007/s10773-015-2866-x | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the relationship between the Noether point symmetries of the
geodesic Lagrangian, in a (pseudo)Riemannian manifold, with the elements of the
Homothetic algebra of the space. We observe that the classification problem of
the Noether symmetries for the geodesic Lagrangian is equivalent with the
classificatio... | [
{
"created": "Tue, 24 Nov 2015 11:23:00 GMT",
"version": "v1"
}
] | 2015-11-25 | [
[
"Paliathanasis",
"A.",
""
],
[
"Krishnakumar",
"K.",
""
],
[
"Leach",
"P. G. L.",
""
]
] | We discuss the relationship between the Noether point symmetries of the geodesic Lagrangian, in a (pseudo)Riemannian manifold, with the elements of the Homothetic algebra of the space. We observe that the classification problem of the Noether symmetries for the geodesic Lagrangian is equivalent with the classification ... |
1807.09397 | Anzhong Wang | Tongzheng Wang, Jared Fier, Bowen Li, Guoliang Lv, Zhaojun Wang, Yumei
Wu, and Anzhong Wang | Singularities of plane gravitational waves and their memory effects | revtex4-1, one figure. Corrected some typos. Gen. Relativ. Grav. 52
(2020) 21 | Gen. Relativ. Grav. 52 (2020) 21 | 10.1007/s10714-020-02667-1 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Similar to the Schwarzschild coordinates for spherical black holes, the
Baldwin, Jeffery and Rosen (BJR) coordinates for plane gravitational waves are
often singular, and extensions beyond such singularities are necessary, before
studying asymptotic properties of such spacetimes at the null infinity of the
plane, on ... | [
{
"created": "Tue, 24 Jul 2018 23:50:17 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Mar 2019 14:02:49 GMT",
"version": "v2"
},
{
"created": "Fri, 7 Feb 2020 16:46:14 GMT",
"version": "v3"
},
{
"created": "Fri, 13 Mar 2020 20:13:48 GMT",
"version": "v4"
}
] | 2020-03-17 | [
[
"Wang",
"Tongzheng",
""
],
[
"Fier",
"Jared",
""
],
[
"Li",
"Bowen",
""
],
[
"Lv",
"Guoliang",
""
],
[
"Wang",
"Zhaojun",
""
],
[
"Wu",
"Yumei",
""
],
[
"Wang",
"Anzhong",
""
]
] | Similar to the Schwarzschild coordinates for spherical black holes, the Baldwin, Jeffery and Rosen (BJR) coordinates for plane gravitational waves are often singular, and extensions beyond such singularities are necessary, before studying asymptotic properties of such spacetimes at the null infinity of the plane, on wh... |
2110.03116 | Xiang Li | Xiang Li, Ling Sun, Rico Ka Lok Lo, Ethan Payne, Yanbei Chen | Angular emission patterns of remnant black holes | 35 pages (17 in the main text), 25 figures (13 in the main text) | journal = {Phys. Rev. D}, volume = {105}, issue = {2}, pages =
{024016}, numpages = {36}, year = {2022}, month = {Jan} | 10.1103/PhysRevD.105.024016 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational radiation from the ringdown of a binary black hole merger
is described by the solution of the Teukolsky equation, which predicts both the
temporal dependence and the angular distribution of the emission. Many studies
have explored the temporal feature of the ringdown wave through black hole
spectros... | [
{
"created": "Thu, 7 Oct 2021 00:13:38 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jan 2022 23:47:13 GMT",
"version": "v2"
}
] | 2022-01-07 | [
[
"Li",
"Xiang",
""
],
[
"Sun",
"Ling",
""
],
[
"Lo",
"Rico Ka Lok",
""
],
[
"Payne",
"Ethan",
""
],
[
"Chen",
"Yanbei",
""
]
] | The gravitational radiation from the ringdown of a binary black hole merger is described by the solution of the Teukolsky equation, which predicts both the temporal dependence and the angular distribution of the emission. Many studies have explored the temporal feature of the ringdown wave through black hole spectrosco... |
2307.08552 | Guillem Dom\`enech | Shyam Balaji, Guillem Dom\`enech and Gabriele Franciolini | Scalar-induced gravitational wave interpretation of PTA data: the role
of scalar fluctuation propagation speed | 19 pages, 15 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Pulsar timing arrays gathered evidence of the presence of a gravitational
wave background around nHz frequencies. If the gravitational wave background
was induced by large and Gaussian primordial fluctuations, they would then
produce too many sub-solar mass primordial black holes. We show that if at the
time of gravi... | [
{
"created": "Mon, 17 Jul 2023 15:14:47 GMT",
"version": "v1"
}
] | 2023-07-18 | [
[
"Balaji",
"Shyam",
""
],
[
"Domènech",
"Guillem",
""
],
[
"Franciolini",
"Gabriele",
""
]
] | Pulsar timing arrays gathered evidence of the presence of a gravitational wave background around nHz frequencies. If the gravitational wave background was induced by large and Gaussian primordial fluctuations, they would then produce too many sub-solar mass primordial black holes. We show that if at the time of gravita... |
gr-qc/0701124 | Y. Jack Ng | Y. Jack Ng | Hubble Meets Planck: A Cosmic Peek at Quantum Foam | 5 pages, LaTeX; talk given at the 11th Marcel Grossman Meeting
(Berlin, 2006 summer) | null | 10.1142/9789812834300_0477 | null | gr-qc astro-ph hep-th quant-ph | null | If spacetime undergoes quantum fluctuations, an electromagnetic wavefront
will acquire uncertainties in direction as well as phase as it propagates
through spacetime. These uncertainties can show up in interferometric
observations of distant quasars as a decreased fringe visibility. The Very
Large Telescope and Keck ... | [
{
"created": "Mon, 22 Jan 2007 19:36:33 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Ng",
"Y. Jack",
""
]
] | If spacetime undergoes quantum fluctuations, an electromagnetic wavefront will acquire uncertainties in direction as well as phase as it propagates through spacetime. These uncertainties can show up in interferometric observations of distant quasars as a decreased fringe visibility. The Very Large Telescope and Keck in... |
2407.07978 | Marc Geiller | Marc Geiller, Alok Laddha, C\'eline Zwikel | Symmetries of the gravitational scattering in the absence of peeling | 40 pages | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The symmetries of the gravitational scattering are intimately tied to the
symmetries which preserve asymptotic flatness at null infinity. In Penrose's
definition of asymptotic flatness, a central role is played by the notion of
asymptotic simplicity and the ensuing peeling behavior which dictates the decay
rate of th... | [
{
"created": "Wed, 10 Jul 2024 18:18:42 GMT",
"version": "v1"
}
] | 2024-07-12 | [
[
"Geiller",
"Marc",
""
],
[
"Laddha",
"Alok",
""
],
[
"Zwikel",
"Céline",
""
]
] | The symmetries of the gravitational scattering are intimately tied to the symmetries which preserve asymptotic flatness at null infinity. In Penrose's definition of asymptotic flatness, a central role is played by the notion of asymptotic simplicity and the ensuing peeling behavior which dictates the decay rate of the ... |
1408.4376 | Nora Breton | Nora Bret\'on and C. E. Ram\'irez-Codiz | On the NUT-Born-Infeld-$\Lambda$ spacetime | 16 pages, 10 figures | Annals of Physics, vol. 353, 252-270 (2015) | 10.1016/j.aop.2014.11.016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The stationary axisymmetric spacetime coupled to nonlinear Born-Infeld
electrodynamics is studied. The solution was derived by Plebanski et al (1984)
and it is characterized by six free parameters: mass, NUT charge, electric and
magnetic charge, Born-Infeld parameter and cosmological constant. The geodesic
and Lorent... | [
{
"created": "Tue, 19 Aug 2014 16:04:56 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Bretón",
"Nora",
""
],
[
"Ramírez-Codiz",
"C. E.",
""
]
] | The stationary axisymmetric spacetime coupled to nonlinear Born-Infeld electrodynamics is studied. The solution was derived by Plebanski et al (1984) and it is characterized by six free parameters: mass, NUT charge, electric and magnetic charge, Born-Infeld parameter and cosmological constant. The geodesic and Lorentz ... |
1601.00331 | Robert Bluhm | Robert Bluhm | Gravity with background fields and diffeomorphism breaking | Presented at the 14th Marcel Grossmann Meeting, Rome, Italy, July
2015 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Effective gravitational field theories with background fields break local
Lorentz symmetry and diffeomorphism invariance. Examples include Chern-Simons
gravity, massive gravity, and the Standard-Model Extension (SME). The physical
properties and behavior of these theories depend greatly on whether the
spacetime symme... | [
{
"created": "Sun, 3 Jan 2016 19:40:29 GMT",
"version": "v1"
}
] | 2016-01-05 | [
[
"Bluhm",
"Robert",
""
]
] | Effective gravitational field theories with background fields break local Lorentz symmetry and diffeomorphism invariance. Examples include Chern-Simons gravity, massive gravity, and the Standard-Model Extension (SME). The physical properties and behavior of these theories depend greatly on whether the spacetime symmetr... |
1202.2767 | Hamid Reza Sepangi | Nima Khosravi, Hamid Reza Sepangi and Shahab Shahidi | Massive cosmological scalar perturbations | 9 pages, no figures, super horizon solution added and discussed | Phys. Rev. D 86 (2012) 043517 | 10.1103/PhysRevD.86.043517 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the cosmological perturbations of the new bi-metric gravity proposed
by Hassan and Rosen \cite{hasan} as a representation of massive gravity. The
mass term in the model, in addition of ensuring ghost freedom for both metrics,
causes the two scale factors to mix at the cosmological level and this affects
the ... | [
{
"created": "Mon, 13 Feb 2012 15:43:48 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Mar 2012 14:48:29 GMT",
"version": "v2"
},
{
"created": "Wed, 22 Aug 2012 03:06:16 GMT",
"version": "v3"
}
] | 2013-05-30 | [
[
"Khosravi",
"Nima",
""
],
[
"Sepangi",
"Hamid Reza",
""
],
[
"Shahidi",
"Shahab",
""
]
] | We study the cosmological perturbations of the new bi-metric gravity proposed by Hassan and Rosen \cite{hasan} as a representation of massive gravity. The mass term in the model, in addition of ensuring ghost freedom for both metrics, causes the two scale factors to mix at the cosmological level and this affects the co... |
1901.07540 | W.J. Handley | Will Handley, Anthony Lasenby and Mike Hobson | Logolinear series expansions with applications to primordial cosmology | 12 pages, 4 figures | Phys. Rev. D 99, 123512 (2019) | 10.1103/PhysRevD.99.123512 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a method for computing series expansions for solutions to ordinary
differential equations when the asymptotic form contains both linear and
logarithmic terms. Such situations are common in primordial cosmology when
considering series expansions out of a singularity in the equations arising
from a pre-infla... | [
{
"created": "Mon, 21 Jan 2019 20:24:07 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jun 2019 11:11:54 GMT",
"version": "v2"
}
] | 2019-06-19 | [
[
"Handley",
"Will",
""
],
[
"Lasenby",
"Anthony",
""
],
[
"Hobson",
"Mike",
""
]
] | We develop a method for computing series expansions for solutions to ordinary differential equations when the asymptotic form contains both linear and logarithmic terms. Such situations are common in primordial cosmology when considering series expansions out of a singularity in the equations arising from a pre-inflati... |
gr-qc/9307003 | Donald Marolf | Donald Marolf | Models of Particle Detection in Regions of Spacetime | 21 preprint or 10 journal pages REVTEX, SU-GP-93/5-4 | Phys. Rev. A 50 (1994) 939 | 10.1103/PhysRevA.50.939 | null | gr-qc hep-th | null | We investigate two models of measuring devices designed to detect a
non-relativistic free particle in a given region of spacetime. These models
predict different probabilities for a free quantum particle to enter a
spacetime region $R$ so that this notion is device dependent. The first model
is of a von Neumann coupl... | [
{
"created": "Tue, 6 Jul 1993 20:04:00 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Marolf",
"Donald",
""
]
] | We investigate two models of measuring devices designed to detect a non-relativistic free particle in a given region of spacetime. These models predict different probabilities for a free quantum particle to enter a spacetime region $R$ so that this notion is device dependent. The first model is of a von Neumann couplin... |
1811.00843 | Ercan Kilicarslan | Ercan Kilicarslan | On memory effect in modified gravity theories | 14 pages, references added, published in Turkish Journal of Physics | Turk J Phys, 43, (2019), 126-134 | 10.3906/fiz-1811-2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note, we discuss the gravitational memory effect in higher derivative
and infinite derivative gravity theories and give the detailed relevant
calculations whose results were given in our recent works. We show that the
memory effect in higher derivative gravity takes the same form as in pure GR at
large distan... | [
{
"created": "Fri, 2 Nov 2018 13:08:04 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Mar 2019 21:43:51 GMT",
"version": "v2"
}
] | 2019-03-05 | [
[
"Kilicarslan",
"Ercan",
""
]
] | In this note, we discuss the gravitational memory effect in higher derivative and infinite derivative gravity theories and give the detailed relevant calculations whose results were given in our recent works. We show that the memory effect in higher derivative gravity takes the same form as in pure GR at large distance... |
2310.19964 | Benjamin J. Owen | Benjamin J. Owen, Lee Lindblom, Luciano Soares Pinheiro and Binod
Rajbhandari | Improved Upper Limits on Gravitational Wave Emission from NS 1987A in
SNR 1987A | 7 pages, 1 figure | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We report on a new search for continuous gravitational waves from NS 1987A,
the neutron star born in SN 1987A, using open data from Advanced LIGO and
Virgo's third observing run (O3). The search covered frequencies from 35-1050
Hz, more than five times the band of the only previous gravitational wave
search to constr... | [
{
"created": "Mon, 30 Oct 2023 19:27:29 GMT",
"version": "v1"
}
] | 2023-11-01 | [
[
"Owen",
"Benjamin J.",
""
],
[
"Lindblom",
"Lee",
""
],
[
"Pinheiro",
"Luciano Soares",
""
],
[
"Rajbhandari",
"Binod",
""
]
] | We report on a new search for continuous gravitational waves from NS 1987A, the neutron star born in SN 1987A, using open data from Advanced LIGO and Virgo's third observing run (O3). The search covered frequencies from 35-1050 Hz, more than five times the band of the only previous gravitational wave search to constrai... |
1703.01492 | Jon Chkareuli | J.L. Chkareuli | Poincar\'e gauge gravity: an emergent scenario | 33 pages, published version, to appear in Physical Review D (2017).
arXiv admin note: text overlap with arXiv:1305.6898 | Phys. Rev. D 95, 084051 (2017) | 10.1103/PhysRevD.95.084051 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Poincar\'e gauge gravity (PGG) with the underlying vector fields of
tetrads and spin-connections is perhaps the best theory candidate for
gravitation to be unified with the other three elementary forces of nature.
There is a clear analogy between local frame in PGG and local internal symmetry
space in the Standar... | [
{
"created": "Sat, 4 Mar 2017 17:09:08 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Apr 2017 08:22:08 GMT",
"version": "v2"
},
{
"created": "Sat, 22 Apr 2017 15:18:16 GMT",
"version": "v3"
}
] | 2017-05-03 | [
[
"Chkareuli",
"J. L.",
""
]
] | The Poincar\'e gauge gravity (PGG) with the underlying vector fields of tetrads and spin-connections is perhaps the best theory candidate for gravitation to be unified with the other three elementary forces of nature. There is a clear analogy between local frame in PGG and local internal symmetry space in the Standard ... |
0901.3063 | Lorenzo Iorio | Lorenzo Iorio | Solar System planetary tests of \dot c/c | Latex, 12 pages, 1 figure, 3 tables, 23 references. Minor changes. To
appear in General Relativity and Gravitation (GRG) | Gen.Rel.Grav.42:199-208,2010 | 10.1007/s10714-009-0830-x | null | gr-qc astro-ph.CO astro-ph.EP hep-ex physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Analytical and numerical calculations show that a putative temporal variation
of the speed of light c, with the meaning of space-time structure constant
c_ST, assumed to be linear over timescales of about one century, would induce a
secular precession of the longitude of the pericenter \varpi of a test particle
orbit... | [
{
"created": "Tue, 20 Jan 2009 14:26:55 GMT",
"version": "v1"
},
{
"created": "Fri, 15 May 2009 20:40:45 GMT",
"version": "v2"
}
] | 2009-12-10 | [
[
"Iorio",
"Lorenzo",
""
]
] | Analytical and numerical calculations show that a putative temporal variation of the speed of light c, with the meaning of space-time structure constant c_ST, assumed to be linear over timescales of about one century, would induce a secular precession of the longitude of the pericenter \varpi of a test particle orbitin... |
1404.7689 | Shahab Shahidi | Zahra Haghani, Tiberiu Harko, Hamid Reza Sepangi and Shahab Shahidi | The scalar Einstein-aether theory | 11 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider an Einstein-aether type Lorentz-violating theory of gravity in
which the aether vector field $V_{\mu }$ is represented as the gradient of a
scalar field $\phi $, $V_{\mu }=\nabla _{\mu }\phi $. A self interacting
potential for the scalar aether field is considered, as well as the possibility
of a coupling... | [
{
"created": "Wed, 30 Apr 2014 11:42:27 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Jul 2014 11:15:12 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Oct 2014 11:47:15 GMT",
"version": "v3"
}
] | 2014-10-08 | [
[
"Haghani",
"Zahra",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Sepangi",
"Hamid Reza",
""
],
[
"Shahidi",
"Shahab",
""
]
] | We consider an Einstein-aether type Lorentz-violating theory of gravity in which the aether vector field $V_{\mu }$ is represented as the gradient of a scalar field $\phi $, $V_{\mu }=\nabla _{\mu }\phi $. A self interacting potential for the scalar aether field is considered, as well as the possibility of a coupling b... |
2201.02287 | Mariana Lira Peralta | Mariana Lira, Juan Carlos Degollado, Claudia Moreno, Dar\'io N\'u\~nez | On the role of magnetic fields into the dynamics and gravitational wave
emission of binary neutron stars | 19 pages, 10 figures | null | 10.1007/s10714-022-03035-x | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Modelling as a dipole the magnetic interaction of a binary system of neutron
stars, we are able to include the magnetic effects in the Newtonian and in the
inspiral dynamics of the system using an equivalent one-body description.
Furthermore, in the inspiral stage we determine the role of the magnetic
interaction in ... | [
{
"created": "Fri, 7 Jan 2022 01:52:03 GMT",
"version": "v1"
}
] | 2022-11-30 | [
[
"Lira",
"Mariana",
""
],
[
"Degollado",
"Juan Carlos",
""
],
[
"Moreno",
"Claudia",
""
],
[
"Núñez",
"Darío",
""
]
] | Modelling as a dipole the magnetic interaction of a binary system of neutron stars, we are able to include the magnetic effects in the Newtonian and in the inspiral dynamics of the system using an equivalent one-body description. Furthermore, in the inspiral stage we determine the role of the magnetic interaction in th... |
gr-qc/9610024 | Othmar Brodbeck | Othmar Brodbeck | On Symmetric Gauge Fields for arbitrary Gauge and Symmetry Groups | 4 pages, Latex, talk given at Les Journees Relativistes 96, Ascona,
Switzerland, May 26-30, to appear in Helv. Phys. Acta | Helv.Phys.Acta 69:321-324,1996 | null | ZU-TH-29/96 | gr-qc | null | A classification of the possible symmetric principal bundles with a compact
gauge group, a compact symmetry group and a base manifold which is regularly
foliated by the orbits of the symmetry group is derived. A generalization of
Wang's theorem (classifying the invariant connections) is proven and local
expressions f... | [
{
"created": "Tue, 15 Oct 1996 00:19:42 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Brodbeck",
"Othmar",
""
]
] | A classification of the possible symmetric principal bundles with a compact gauge group, a compact symmetry group and a base manifold which is regularly foliated by the orbits of the symmetry group is derived. A generalization of Wang's theorem (classifying the invariant connections) is proven and local expressions for... |
2209.11590 | Pardyumn Kumar Sahoo | Oleksii Sokoliuk, Sneha Pradhan, P.K. Sahoo, Alexander Baransky | Buchdahl quark stars within $f(Q)$ theory | EPJ Plus published version | Eur. Phys. J. Plus, 137 (2022) 1077 | 10.1140/epjp/s13360-022-03273-7 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In the present paper, authors study the strange stars with the MIT Bag EoS
admitting Buchdahl symmetry (non-singular and physically viable metric
potential) in the both linear $f(Q)=aQ+b$ and non-linear $f(Q)=Q+aQ^b$ forms of
modified symmetric teleparallel gravitation. In order to obtain the correct
form of Buchdahl... | [
{
"created": "Fri, 23 Sep 2022 13:49:38 GMT",
"version": "v1"
}
] | 2022-09-26 | [
[
"Sokoliuk",
"Oleksii",
""
],
[
"Pradhan",
"Sneha",
""
],
[
"Sahoo",
"P. K.",
""
],
[
"Baransky",
"Alexander",
""
]
] | In the present paper, authors study the strange stars with the MIT Bag EoS admitting Buchdahl symmetry (non-singular and physically viable metric potential) in the both linear $f(Q)=aQ+b$ and non-linear $f(Q)=Q+aQ^b$ forms of modified symmetric teleparallel gravitation. In order to obtain the correct form of Buchdahl m... |
gr-qc/0612073 | Cosimo Stornaiolo | V. I. Man'ko, G. Marmoand C. Stornaiolo | Tomographic entropy and cosmology | 19 pages | Gen.Rel.Grav.40:1449-1465,2008 | 10.1007/s10714-007-0571-7 | null | gr-qc | null | The probability representation of quantum mechanics including propagators and
tomograms of quantum states of the universe and its application to quantum
gravity and cosmology are reviewed. The minisuperspaces modeled by oscillator,
free pointlike particle and repulsive oscillator are considered. The notion of
tomogra... | [
{
"created": "Tue, 12 Dec 2006 16:04:50 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Man'ko",
"V. I.",
""
],
[
"Stornaiolo",
"G. Marmoand C.",
""
]
] | The probability representation of quantum mechanics including propagators and tomograms of quantum states of the universe and its application to quantum gravity and cosmology are reviewed. The minisuperspaces modeled by oscillator, free pointlike particle and repulsive oscillator are considered. The notion of tomograph... |
2204.06007 | Halston Lim | Halston Lim, Gaurav Khanna, and Scott A. Hughes | Measuring quasi-normal mode amplitudes with misaligned binary black hole
ringdowns | 19 pages, 14 figures, submitted to PRD | null | 10.1103/PhysRevD.105.124030 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent work, we examined how different modes in the ringdown phase of a
binary coalescence are excited as a function of the final plunge geometry. At
least in the large mass ratio limit, we found a clean mapping between angles
describing the plunge and the amplitude of different quasi-normal modes (QNMs)
which con... | [
{
"created": "Tue, 12 Apr 2022 18:00:02 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Apr 2022 14:51:24 GMT",
"version": "v2"
},
{
"created": "Tue, 24 May 2022 17:02:46 GMT",
"version": "v3"
}
] | 2022-06-29 | [
[
"Lim",
"Halston",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Hughes",
"Scott A.",
""
]
] | In recent work, we examined how different modes in the ringdown phase of a binary coalescence are excited as a function of the final plunge geometry. At least in the large mass ratio limit, we found a clean mapping between angles describing the plunge and the amplitude of different quasi-normal modes (QNMs) which const... |
gr-qc/0503037 | Saulo Carneiro | H. A. Borges and S. Carneiro | Friedmann cosmology with decaying vacuum density | Accepted for publication in General Relativity and Gravitation | Gen.Rel.Grav.37:1385-1394,2005 | 10.1007/s10714-005-0122-z | null | gr-qc astro-ph | null | Among the several proposals to solve the incompatibility between the observed
small value of the cosmological constant and the huge value obtained by quantum
field theories, we can find the idea of a decaying vacuum energy density,
leading from high values at early times of universe evolution to the small
value obser... | [
{
"created": "Wed, 9 Mar 2005 18:11:32 GMT",
"version": "v1"
}
] | 2010-03-19 | [
[
"Borges",
"H. A.",
""
],
[
"Carneiro",
"S.",
""
]
] | Among the several proposals to solve the incompatibility between the observed small value of the cosmological constant and the huge value obtained by quantum field theories, we can find the idea of a decaying vacuum energy density, leading from high values at early times of universe evolution to the small value observe... |
gr-qc/9805036 | Justino Martinez | L. Herrera, J. Martinez | Dissipative Collapse Through the Critical Point | 14 pages, 12 Postscript figures. Emtex 2.09 To appear in Astrophysics
and Space Science | Astrophys.Space Sci. 259 (1998) 235-253 | 10.1023/A:1001548205684 | null | gr-qc astro-ph | null | A relativistic model of a heat conducting collapsing star, which includes
thermal pre-relaxation processes, is presented. Particular attention is paid to
the influence of a given parameter defined in terms of thermodynamic variables,
on the outcome of evolution. Evaluation of the system when passing through a
critica... | [
{
"created": "Mon, 11 May 1998 18:56:01 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Herrera",
"L.",
""
],
[
"Martinez",
"J.",
""
]
] | A relativistic model of a heat conducting collapsing star, which includes thermal pre-relaxation processes, is presented. Particular attention is paid to the influence of a given parameter defined in terms of thermodynamic variables, on the outcome of evolution. Evaluation of the system when passing through a critical ... |
2205.04266 | Ming Zhang | Chaoxi Fang, Libo Xie, Jie Jiang and Ming Zhang | Scalar-hairy Lovelock gravity respects zeroth law | 7 pages | null | 10.1016/j.physletb.2022.137149 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We study the zeroth law for Killing horizon in scalar-hairy Lovelock gravity,
and show that the surface gravity of a general Killing horizon in the
scalar-hairy Lovelock gravity is constant, provided that the dominant energy
condition is obeyed by the matter field.
| [
{
"created": "Mon, 9 May 2022 13:35:33 GMT",
"version": "v1"
}
] | 2022-06-08 | [
[
"Fang",
"Chaoxi",
""
],
[
"Xie",
"Libo",
""
],
[
"Jiang",
"Jie",
""
],
[
"Zhang",
"Ming",
""
]
] | We study the zeroth law for Killing horizon in scalar-hairy Lovelock gravity, and show that the surface gravity of a general Killing horizon in the scalar-hairy Lovelock gravity is constant, provided that the dominant energy condition is obeyed by the matter field. |
2303.11907 | Jonatas Arizilanio Silva | Jonatas A. Silva, F\'abio C. Carvalho and Antonio R. G. Garcia | An Approach to the Primordial Universe Using Colombeau's Simplified
Algebra | null | null | null | null | gr-qc math-ph math.FA math.MP | http://creativecommons.org/licenses/by/4.0/ | The proposal "no boundary" of physicists Hartle and Hawking seeks to build a
satisfactory model of the early Universe, in a way that avoids the singularity
"Big Bang" of the beginning of the Universe. As a consequence of this proposal,
the concept of metric signature change arises, which is approached in different
wa... | [
{
"created": "Tue, 21 Mar 2023 14:56:43 GMT",
"version": "v1"
}
] | 2023-03-22 | [
[
"Silva",
"Jonatas A.",
""
],
[
"Carvalho",
"Fábio C.",
""
],
[
"Garcia",
"Antonio R. G.",
""
]
] | The proposal "no boundary" of physicists Hartle and Hawking seeks to build a satisfactory model of the early Universe, in a way that avoids the singularity "Big Bang" of the beginning of the Universe. As a consequence of this proposal, the concept of metric signature change arises, which is approached in different ways... |
2001.02304 | Ali Nur Nurbaki | Ali Nur Nurbaki, Salvatore Capozziello, Cemsinan Deliduman | Spherical and cylindrical solutions in f (T) gravity by Noether Symmetry
Approach | 9 pages, accepted for publication in EPJ C | null | 10.1140/epjc/s10052-020-7666-7 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find exact solutions for f (T) teleparallel gravity for the cases of
spherically and cylindrically symmetric tetrads. The adopted method is based on
the search for Noether symmetries of point-like Lagrangians defined in Jordan
and Einstein frames. Constants of motion are used to reduce the dynamical
system.We firs... | [
{
"created": "Tue, 7 Jan 2020 22:23:41 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Jan 2020 18:38:30 GMT",
"version": "v2"
}
] | 2020-03-18 | [
[
"Nurbaki",
"Ali Nur",
""
],
[
"Capozziello",
"Salvatore",
""
],
[
"Deliduman",
"Cemsinan",
""
]
] | We find exact solutions for f (T) teleparallel gravity for the cases of spherically and cylindrically symmetric tetrads. The adopted method is based on the search for Noether symmetries of point-like Lagrangians defined in Jordan and Einstein frames. Constants of motion are used to reduce the dynamical system.We first ... |
1805.10581 | Slava G. Turyshev | Slava G. Turyshev, Viktor T. Toth | Wave-optical treatment of the shadow cast by a large gravitating sphere | 16 pages, 3 figures | Phys. Rev. D 98, 104015 (2018) | 10.1103/PhysRevD.98.104015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the shadow cast by a large gravitating sphere, similar to our Sun.
For this, we consider the gravitational field produced by a static mass
monopole within the first post-Newtonian approximation of the general theory of
relativity. We study the propagation of a monochromatic electromagnetic wave in
the vicini... | [
{
"created": "Sun, 27 May 2018 05:02:23 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Aug 2018 18:12:01 GMT",
"version": "v2"
}
] | 2018-11-15 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Toth",
"Viktor T.",
""
]
] | We study the shadow cast by a large gravitating sphere, similar to our Sun. For this, we consider the gravitational field produced by a static mass monopole within the first post-Newtonian approximation of the general theory of relativity. We study the propagation of a monochromatic electromagnetic wave in the vicinity... |
1002.2618 | Martin Bojowald | Martin Bojowald | Quantum gravity effects on space-time | 24 pages, 4 figures, plenary talk at The Nineteenth Workshop on
General Relativity and Gravitation in Japan (JGRG19) at Rikkyo University,
Dec 2009 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativity promotes space-time to a physical, dynamical object
subject to equations of motion. Quantum gravity, accordingly, must provide a
quantum framework for space-time, applicable on the smallest distance scales.
Just like generic states in quantum mechanics, quantum space-time structures
may be highly c... | [
{
"created": "Fri, 12 Feb 2010 18:59:11 GMT",
"version": "v1"
}
] | 2010-02-15 | [
[
"Bojowald",
"Martin",
""
]
] | General relativity promotes space-time to a physical, dynamical object subject to equations of motion. Quantum gravity, accordingly, must provide a quantum framework for space-time, applicable on the smallest distance scales. Just like generic states in quantum mechanics, quantum space-time structures may be highly cou... |
1306.1022 | Matti Raasakka | Matti Raasakka and Adrian Tanasa | Combinatorial Hopf algebra for the Ben Geloun-Rivasseau tensor field
theory | accepted for publication in Seminaire Lotharingien de Combinatoire;
32 pages (plus 6 scrap pages due to arXiv compiler), 17 figures, 2 tables;
reduced review on Hopf algebra basics and several minor clarifying
modifications w/r to the previous version | Seminaire Lotharingien de Combinatoire 70 (2014), B70d | null | null | gr-qc hep-th math-ph math.CO math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Ben Geloun-Rivasseau quantum field theoretical model is the first tensor
model shown to be perturbatively renormalizable. We define here an appropriate
Hopf algebra describing the combinatorics of this new tensorial
renormalization. The structure we propose is significantly different from the
previously defined C... | [
{
"created": "Wed, 5 Jun 2013 08:35:19 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Nov 2013 17:11:10 GMT",
"version": "v2"
}
] | 2014-08-15 | [
[
"Raasakka",
"Matti",
""
],
[
"Tanasa",
"Adrian",
""
]
] | The Ben Geloun-Rivasseau quantum field theoretical model is the first tensor model shown to be perturbatively renormalizable. We define here an appropriate Hopf algebra describing the combinatorics of this new tensorial renormalization. The structure we propose is significantly different from the previously defined Con... |
gr-qc/0612059 | Dumitru Baleanu | Dumitru Baleanu | Cosmological perturbations in FRW model with scalar field within
Hamilton-Jacobi formalism and symplectic projector method | 11 pages | CentralEur.J.Phys.4:503-510,2006 | 10.2478/s11534-006-0030-1 | null | gr-qc | null | The Hamilton-Jacobi analysis is applied to the dynamics of the scalar
fluctuations about the Friedmann-Robertson-Walker (FRW). The gauge conditions
are found from the consistency conditions. The physical degrees of freedom of
the model are obtain by symplectic projector method. The role of the linearly
dependent Hami... | [
{
"created": "Mon, 11 Dec 2006 10:02:40 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Baleanu",
"Dumitru",
""
]
] | The Hamilton-Jacobi analysis is applied to the dynamics of the scalar fluctuations about the Friedmann-Robertson-Walker (FRW). The gauge conditions are found from the consistency conditions. The physical degrees of freedom of the model are obtain by symplectic projector method. The role of the linearly dependent Hamilt... |
gr-qc/0302112 | Eduardo Sergio Santini | N. Pinto-Neto (CBPF-Rio de Janeiro) and E. Sergio Santini
(UFES-Vitoria, CNEN and CBPF-Rio de Janeiro) | The accelerated expansion of the Universe as a quantum cosmological
effect | null | Phys.Lett. A315 (2003) 36-50 | 10.1016/S0375-9601(03)01000-4 | null | gr-qc astro-ph hep-th | null | We study the quantized Friedmann-Lema\^{\i}tre-Robertson-Walker (FLRW) model
minimally coupled to a free massless scalar field. In a previous paper,
\cite{fab2}, solutions of this model were constructed as gaussian
superpositions of negative and positive modes solutions of the Wheeler-DeWitt
equation, and quantum boh... | [
{
"created": "Thu, 27 Feb 2003 15:24:09 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Pinto-Neto",
"N.",
"",
"CBPF-Rio de Janeiro"
],
[
"Santini",
"E. Sergio",
"",
"UFES-Vitoria, CNEN and CBPF-Rio de Janeiro"
]
] | We study the quantized Friedmann-Lema\^{\i}tre-Robertson-Walker (FLRW) model minimally coupled to a free massless scalar field. In a previous paper, \cite{fab2}, solutions of this model were constructed as gaussian superpositions of negative and positive modes solutions of the Wheeler-DeWitt equation, and quantum bohmi... |
gr-qc/0612069 | Jiro Soda | Jiro Soda, Sugumi Kanno | Impact of Lorentz Violation on Cosmology | 4 pages, prepared for the proceedings of the 16th workshop on general
relativity and gravitation, Niigata, Japan, Nov.27 - Dec.1, 2006 | null | null | null | gr-qc astro-ph hep-th | null | We discuss the impact of Lorentz violation on the cosmology. Firstly, we show
that the Lorentz violation affects the dynamics of the chaotic inflationary
model and gives rise to an interesting feature. Secondly, we propose the
Lorentz violating DGP brane models where the Lorentz violating terms on the
brane accelerat... | [
{
"created": "Tue, 12 Dec 2006 06:38:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Soda",
"Jiro",
""
],
[
"Kanno",
"Sugumi",
""
]
] | We discuss the impact of Lorentz violation on the cosmology. Firstly, we show that the Lorentz violation affects the dynamics of the chaotic inflationary model and gives rise to an interesting feature. Secondly, we propose the Lorentz violating DGP brane models where the Lorentz violating terms on the brane accelerate ... |
0903.0120 | Chen Songbai | Songbai Chen, Jiliang Jing | Dark energy interacting with dark matter and unparticle | 16 pages, 7 figures | Class.Quant.Grav.26:155006,2009 | 10.1088/0264-9381/26/15/155006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study dynamical behaviors of the dark energy models interacting with dark
matter and unparticle in the standard flat FRW cosmology. We considered four
different interacting models and examined the stability of the critical points.
We find that there exist late-time scaling attractors corresponding to an
accelerati... | [
{
"created": "Sun, 1 Mar 2009 03:02:16 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Jul 2009 03:50:09 GMT",
"version": "v2"
}
] | 2010-04-15 | [
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | We study dynamical behaviors of the dark energy models interacting with dark matter and unparticle in the standard flat FRW cosmology. We considered four different interacting models and examined the stability of the critical points. We find that there exist late-time scaling attractors corresponding to an accelerating... |
0905.1493 | Swapnil Tripathi | Swapnil Tripathi | Examining the Field of Static Point Scalar Charge in Schwarzschild
Spacetime | 15 pages, 2 figures, modified title, corrected typos, added
references | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we examine some aspects of the field of a scalar point charge
in curved spacetimes. First we find the closed form solution for the scalar
field due to a point charge in Schwarzschild spacetime. Then we expand it
locally in powers of r (coordinate distance from the charge) and compare it to
Quinn's local... | [
{
"created": "Sun, 10 May 2009 18:40:28 GMT",
"version": "v1"
},
{
"created": "Sun, 17 May 2009 23:25:20 GMT",
"version": "v2"
}
] | 2009-05-18 | [
[
"Tripathi",
"Swapnil",
""
]
] | In this paper we examine some aspects of the field of a scalar point charge in curved spacetimes. First we find the closed form solution for the scalar field due to a point charge in Schwarzschild spacetime. Then we expand it locally in powers of r (coordinate distance from the charge) and compare it to Quinn's local e... |
1702.08908 | Valeri Vardanyan | Valeri Vardanyan, Yashar Akrami, Luca Amendola, Alessandra Silvestri | On nonlocally interacting metrics, and a simple proposal for cosmic
acceleration | 47 pages in JCAP style, 7 figures. Some discussions extended in
response to referee's comments. Version accepted for publication in JCAP | JCAP 1803 (2018) 048 | 10.1088/1475-7516/2018/03/048 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a simple, nonlocal modification to general relativity (GR) on
large scales, which provides a model of late-time cosmic acceleration in the
absence of the cosmological constant and with the same number of free
parameters as in standard cosmology. The model is motivated by adding to the
gravity sector an ext... | [
{
"created": "Tue, 28 Feb 2017 18:59:04 GMT",
"version": "v1"
},
{
"created": "Mon, 29 May 2017 16:31:26 GMT",
"version": "v2"
},
{
"created": "Tue, 20 Mar 2018 16:40:09 GMT",
"version": "v3"
}
] | 2018-03-30 | [
[
"Vardanyan",
"Valeri",
""
],
[
"Akrami",
"Yashar",
""
],
[
"Amendola",
"Luca",
""
],
[
"Silvestri",
"Alessandra",
""
]
] | We propose a simple, nonlocal modification to general relativity (GR) on large scales, which provides a model of late-time cosmic acceleration in the absence of the cosmological constant and with the same number of free parameters as in standard cosmology. The model is motivated by adding to the gravity sector an extra... |
1309.2448 | Burkhard Kleihaus | Vladimir Dzhunushaliev, Vladimir Folomeev, Burkhard Kleihaus, Jutta
Kunz, and Eugen Radu | Rotating Wormholes in Five Dimensions | 20 pages, 9 figures | Phys. Rev. D 88, 124028 (2013) | 10.1103/PhysRevD.88.124028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider rotating Lorentzian wormholes with a phantom field in five
dimensions. These wormhole solutions possess equal angular momenta and thus
represent cohomogeneity-1 configurations. For a given size of the throat, the
angular momenta are bounded by the value of the corresponding extremal
Myers-Perry black hole... | [
{
"created": "Tue, 10 Sep 2013 10:33:30 GMT",
"version": "v1"
}
] | 2013-12-16 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Radu",
"Eugen",
""
]
] | We consider rotating Lorentzian wormholes with a phantom field in five dimensions. These wormhole solutions possess equal angular momenta and thus represent cohomogeneity-1 configurations. For a given size of the throat, the angular momenta are bounded by the value of the corresponding extremal Myers-Perry black hole, ... |
2205.14554 | Qing-Guo Huang | Qing-Hua Zhu, Yu-Xuan Han, and Qing-Guo Huang | The Shadow of Supertranslated Schwarzschild Black Hole | 7 pages, 5 figures | null | 10.1140/epjc/s10052-023-11232-4 | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | The supertranslated black hole proposed by Hawking, Perry, and Strominger
might provide a resolution to the information paradox, which is usually defined
by a complicated space-time metric with even less space-time symmetries
compared to Kerr black hole. In this paper, we figure out the shadow for the
supertranslated... | [
{
"created": "Sun, 29 May 2022 02:17:47 GMT",
"version": "v1"
}
] | 2023-02-15 | [
[
"Zhu",
"Qing-Hua",
""
],
[
"Han",
"Yu-Xuan",
""
],
[
"Huang",
"Qing-Guo",
""
]
] | The supertranslated black hole proposed by Hawking, Perry, and Strominger might provide a resolution to the information paradox, which is usually defined by a complicated space-time metric with even less space-time symmetries compared to Kerr black hole. In this paper, we figure out the shadow for the supertranslated S... |
gr-qc/0106078 | Jozef Sima | Miroslav Sukenik and Jozef Sima | Thermodynamics of Expansive Nondecelerative Universe | 8 pages, LaTeX | null | null | SS-01-07 | gr-qc | null | The present contribution deals with thermodynamic aspects of the model of
Expansive Nondecelerative Universe. In this model, in the matter era a
dependence T^CBR ~ E^CBR ~ a(exp -3/4) holds for the energy of cosmic
background radiation, E^CBR and its temperature T^CBR, while the
proportionality of the energy density ... | [
{
"created": "Mon, 25 Jun 2001 12:33:30 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sukenik",
"Miroslav",
""
],
[
"Sima",
"Jozef",
""
]
] | The present contribution deals with thermodynamic aspects of the model of Expansive Nondecelerative Universe. In this model, in the matter era a dependence T^CBR ~ E^CBR ~ a(exp -3/4) holds for the energy of cosmic background radiation, E^CBR and its temperature T^CBR, while the proportionality of the energy density ep... |
gr-qc/9806033 | Tom Martin | Tom Martin | Testing the Boundary Conditions of General Relativity Near the Earth-Sun
Saddle Point | 10 pages, URL included | null | null | GRI-980605 | gr-qc | null | We suggest that a satellite with a stable atomic clock on board be sent
through the Earth-Sun gravitational saddle point to experimentally determine
whether Nature prefers static solutions of the field equations of General
Relativity, such as the standard Schwarzschild solution, or whether Nature
prefers equivalent n... | [
{
"created": "Sun, 7 Jun 1998 14:33:00 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Jun 1999 22:03:57 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Martin",
"Tom",
""
]
] | We suggest that a satellite with a stable atomic clock on board be sent through the Earth-Sun gravitational saddle point to experimentally determine whether Nature prefers static solutions of the field equations of General Relativity, such as the standard Schwarzschild solution, or whether Nature prefers equivalent non... |
2211.14174 | Milko Estrada | Milko Estrada and Francisco Tello-Ortiz and Ksh. Newton Singh and S.
K. Maurya | Representation of compact stars using the black string set--up | null | Chin.J.Phys. (2022) | 10.1016/j.cjph.2022.11.015 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | This work is devoted to provide a way of representing $4D$ spherically
symmetric and static compact stellar configurations into a $5D$ space time,
using the black string framework.
We write the four and five dimensional line elements and the four and five
dimensional energy momentum tensor such that the four and fi... | [
{
"created": "Fri, 25 Nov 2022 15:23:48 GMT",
"version": "v1"
}
] | 2022-11-28 | [
[
"Estrada",
"Milko",
""
],
[
"Tello-Ortiz",
"Francisco",
""
],
[
"Singh",
"Ksh. Newton",
""
],
[
"Maurya",
"S. K.",
""
]
] | This work is devoted to provide a way of representing $4D$ spherically symmetric and static compact stellar configurations into a $5D$ space time, using the black string framework. We write the four and five dimensional line elements and the four and five dimensional energy momentum tensor such that the four and five d... |
1412.0526 | Sumit Som | S. Som and A. Sil | Interacting holographic dark energy models: A general approach | 20 pages, 5 figures | Astrophys. Space Sci., 352, 867, (2014) | 10.1007/s10509-014-1926-7 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dark energy models inspired by the cosmological holographic principle are
studied in homogeneous isotropic spacetime with a general choice for the dark
energy density $\rho_d=3(\alpha H^2+\beta\dot{H})$. Special choices of the
parameters enable us to obtain three different holographic models, including
the holographi... | [
{
"created": "Mon, 1 Dec 2014 16:12:56 GMT",
"version": "v1"
}
] | 2014-12-02 | [
[
"Som",
"S.",
""
],
[
"Sil",
"A.",
""
]
] | Dark energy models inspired by the cosmological holographic principle are studied in homogeneous isotropic spacetime with a general choice for the dark energy density $\rho_d=3(\alpha H^2+\beta\dot{H})$. Special choices of the parameters enable us to obtain three different holographic models, including the holographic ... |
1511.02238 | Gabriel Bernardi de Freitas | Gabriel Bernardi de Freitas, Mahdi Godazgar and Harvey S. Reall | Twisting algebraically special solutions in five dimensions | 39 pages plus appendix | null | 10.1088/0264-9381/33/9/095002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We determine the general form of the solutions of the five-dimensional vacuum
Einstein equations with cosmological constant for which (i) the Weyl tensor is
everywhere type II or more special in the null alignment classification of
Coley et al., and (ii) the $3 \times 3$ matrix encoding the expansion, shear
and twist... | [
{
"created": "Fri, 6 Nov 2015 21:11:29 GMT",
"version": "v1"
}
] | 2016-04-27 | [
[
"de Freitas",
"Gabriel Bernardi",
""
],
[
"Godazgar",
"Mahdi",
""
],
[
"Reall",
"Harvey S.",
""
]
] | We determine the general form of the solutions of the five-dimensional vacuum Einstein equations with cosmological constant for which (i) the Weyl tensor is everywhere type II or more special in the null alignment classification of Coley et al., and (ii) the $3 \times 3$ matrix encoding the expansion, shear and twist o... |
1809.04955 | Jackson Levi Said | Soumya Chakrabarti, Kazuharu Bamba and Jackson Levi Said | Reconstruction of $f(R)$ lagrangian from a massive scalar field | 13 pages, 10 figures, references added | General Relativity and Gravitation volume 52, Article number: 7
(2020) | 10.1007/s10714-019-2655-6 | FU-PCG-46 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a reconstruction of the Lagrangian for $f(R)$ gravity by using a
massive scalar field. The scalar field is minimally coupled to the action of
$f(R)$ gravity. We demonstrate the use of a theorem based on invertible point
transformation of anharmonic oscillator equation that has only recently been
applied to... | [
{
"created": "Wed, 12 Sep 2018 09:46:18 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Sep 2018 21:36:06 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Feb 2020 07:31:44 GMT",
"version": "v3"
}
] | 2020-02-06 | [
[
"Chakrabarti",
"Soumya",
""
],
[
"Bamba",
"Kazuharu",
""
],
[
"Said",
"Jackson Levi",
""
]
] | We present a reconstruction of the Lagrangian for $f(R)$ gravity by using a massive scalar field. The scalar field is minimally coupled to the action of $f(R)$ gravity. We demonstrate the use of a theorem based on invertible point transformation of anharmonic oscillator equation that has only recently been applied to g... |
0809.1888 | Jean-Paul Mbelek | Jean Paul Mbelek | Special relativity may account for the spacecraft flyby anomalies | 3 pages, no figure, error corrected and approximation improved in
section 2 | null | null | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The empirical formula proposed by J. D. Anderson et al. [1] to reproduce the
data on the Earth flyby anomalies is derived from special relativity (SR). The
transverse Doppler shift together with the addition of velocities account for
the Doppler data. Time dilation together with the addition of velocities
account for... | [
{
"created": "Thu, 11 Sep 2008 12:51:53 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Sep 2008 13:41:55 GMT",
"version": "v2"
},
{
"created": "Sun, 15 Mar 2009 23:00:38 GMT",
"version": "v3"
}
] | 2009-03-16 | [
[
"Mbelek",
"Jean Paul",
""
]
] | The empirical formula proposed by J. D. Anderson et al. [1] to reproduce the data on the Earth flyby anomalies is derived from special relativity (SR). The transverse Doppler shift together with the addition of velocities account for the Doppler data. Time dilation together with the addition of velocities account for t... |
gr-qc/9711050 | Silvia Zane | S. L. Shapiro (1,2) and S. Zane (1,3,4) ((1) Department of Physics,
Loomis Laboratory for Physics, University of Illinois at Urbana--Champaign,
Urbana, Illinois, (2) Department of Astronomy and NCSA, University of
Illinois at Urbana--Champaign, Urbana, Illinois, (3) SISSA/ISAS, Trieste,
Italy, (4) Dept of Astro... | Bar mode instability in relativistic rotating stars: a post Newtonian
treatment | 45 pages Latex, 6 ps figures. To be formatted with the AASTeX
package. Submitted to ApJ | null | 10.1086/313124 | null | gr-qc astro-ph | null | We construct analytic models of incompressible, rigidly rotating stars in PN
gravity and study their stability against nonaxisymmetric Jacobi-like bar
modes. PN configurations are modeled by homogeneous triaxial ellipsoids and the
metric is obtained as a solution of Einstein's equations in 3+1 ADM form. We
use an app... | [
{
"created": "Mon, 17 Nov 1997 10:25:58 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Shapiro",
"S. L.",
""
],
[
"Zane",
"S.",
""
]
] | We construct analytic models of incompressible, rigidly rotating stars in PN gravity and study their stability against nonaxisymmetric Jacobi-like bar modes. PN configurations are modeled by homogeneous triaxial ellipsoids and the metric is obtained as a solution of Einstein's equations in 3+1 ADM form. We use an appro... |
1403.5672 | Kentaro Takami | Kentaro Takami, Luciano Rezzolla and Luca Baiotti | Constraining the Equation of State of Neutron Stars from Binary Mergers | 5 pages, 4 figures; matches version on PRL | Phys. Rev. Lett. 113, 091104 (2014) | 10.1103/PhysRevLett.113.091104 | null | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Determining the equation of state of matter at nuclear density and hence the
structure of neutron stars has been a riddle for decades. We show how the
imminent detection of gravitational waves from merging neutron star binaries
can be used to solve this riddle. Using a large number of accurate
numerical-relativity si... | [
{
"created": "Sat, 22 Mar 2014 15:13:32 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Aug 2014 11:59:24 GMT",
"version": "v2"
}
] | 2014-09-05 | [
[
"Takami",
"Kentaro",
""
],
[
"Rezzolla",
"Luciano",
""
],
[
"Baiotti",
"Luca",
""
]
] | Determining the equation of state of matter at nuclear density and hence the structure of neutron stars has been a riddle for decades. We show how the imminent detection of gravitational waves from merging neutron star binaries can be used to solve this riddle. Using a large number of accurate numerical-relativity simu... |
2407.21074 | Esmaeil Ebrahimi | M. Motaghi, A. Sheykhi, E. Ebrahimi | Holographic dark energy in Barrow cosmology with Granda-Oliveros IR
cutoff | 20 pages, 11 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Applying the modified Barrow entropy, inspired by the quantum fluctuation
effects, to the cosmological background, and using thermodynamics-gravity
conjuncture, the Friedmann equations get modified as well. In this paper, we
explore the holographic dark energy with Granda-Oliveros (GO) IR cutoff, in the
context of th... | [
{
"created": "Mon, 29 Jul 2024 13:27:04 GMT",
"version": "v1"
}
] | 2024-08-01 | [
[
"Motaghi",
"M.",
""
],
[
"Sheykhi",
"A.",
""
],
[
"Ebrahimi",
"E.",
""
]
] | Applying the modified Barrow entropy, inspired by the quantum fluctuation effects, to the cosmological background, and using thermodynamics-gravity conjuncture, the Friedmann equations get modified as well. In this paper, we explore the holographic dark energy with Granda-Oliveros (GO) IR cutoff, in the context of the ... |
1504.01772 | Vasilis Oikonomou | S.D. Odintsov, V. K. Oikonomou | Singular deformations of nearly $R^2$ inflation potentials | Revised Version, to appear in CQG | null | 10.1088/0264-9381/32/23/235011 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate in which cases a singular evolution with a singularity of Type
IV, can be consistently incorporated in deformations of the $R^2$ inflationary
potential. After demonstrating the difficulties that the single scalar field
description is confronted with, we use a general two scalar fields model
without oth... | [
{
"created": "Tue, 7 Apr 2015 22:46:38 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Sep 2015 20:51:51 GMT",
"version": "v2"
}
] | 2015-11-18 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | We investigate in which cases a singular evolution with a singularity of Type IV, can be consistently incorporated in deformations of the $R^2$ inflationary potential. After demonstrating the difficulties that the single scalar field description is confronted with, we use a general two scalar fields model without other... |
0805.0356 | Aurelien Barrau | A. Barrau, J. Grain | Holonomy corrections to the cosmological primordial tensor power
spectrum | 5 pages, Proc. of the 43rd Rencontres de Moriond "Cosmology 2008" | null | null | null | gr-qc astro-ph hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Loop quantum gravity is one of the leading candidate theory to
non-perturbatively quantize gravity. In this framework, holonomy corrections to
the equation of propagation of gravitons in a FLRW background have been
derived. We investigate the consequences of those corrections on the tensor
power spectrum in de-Sitter... | [
{
"created": "Sat, 3 May 2008 11:52:05 GMT",
"version": "v1"
}
] | 2008-05-06 | [
[
"Barrau",
"A.",
""
],
[
"Grain",
"J.",
""
]
] | Loop quantum gravity is one of the leading candidate theory to non-perturbatively quantize gravity. In this framework, holonomy corrections to the equation of propagation of gravitons in a FLRW background have been derived. We investigate the consequences of those corrections on the tensor power spectrum in de-Sitter a... |
1603.06338 | \"Umit Ertem | \"Umit Ertem | Lie algebra of conformal Killing-Yano forms | 8 pages, published version | Class. Quantum Grav. 33 (2016) 125033 | 10.1088/0264-9381/33/12/125033 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a generalization of the Lie algebra of conformal Killing vector
fields to conformal Killing-Yano forms. A new Lie bracket for conformal
Killing-Yano forms that corresponds to slightly modified Schouten-Nijenhuis
bracket of differential forms is proposed. We show that conformal Killing-Yano
forms satisfy a ... | [
{
"created": "Mon, 21 Mar 2016 06:47:58 GMT",
"version": "v1"
},
{
"created": "Mon, 30 May 2016 10:58:56 GMT",
"version": "v2"
}
] | 2016-05-31 | [
[
"Ertem",
"Ümit",
""
]
] | We provide a generalization of the Lie algebra of conformal Killing vector fields to conformal Killing-Yano forms. A new Lie bracket for conformal Killing-Yano forms that corresponds to slightly modified Schouten-Nijenhuis bracket of differential forms is proposed. We show that conformal Killing-Yano forms satisfy a gr... |
2402.01992 | Roberto A. Sussman | R.A. Sussman, C.A. Mantica, L.G. Molinari and S. N\'ajera | Second Response to the critique of "Cotton Gravity'' | 2 pages, 6 references | null | null | null | gr-qc astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | Clement and Noiucer submitted a note {\tt arXiv:2401.16008 [gr-qc]} replying
to our criticism {\tt arXiv:2401.10479 [gr-qc]} of their previous submission.
We reply to the contents of this note and remark that these authors have not
addressed our arguments. This will be our last response to them. Readers are
advised t... | [
{
"created": "Sat, 3 Feb 2024 02:28:04 GMT",
"version": "v1"
}
] | 2024-02-06 | [
[
"Sussman",
"R. A.",
""
],
[
"Mantica",
"C. A.",
""
],
[
"Molinari",
"L. G.",
""
],
[
"Nájera",
"S.",
""
]
] | Clement and Noiucer submitted a note {\tt arXiv:2401.16008 [gr-qc]} replying to our criticism {\tt arXiv:2401.10479 [gr-qc]} of their previous submission. We reply to the contents of this note and remark that these authors have not addressed our arguments. This will be our last response to them. Readers are advised to ... |
2006.15169 | Luis L\'opez | L. A. L\'opez and J. C. Olvera | Frequency Shifts of photons emitted from geodesics of nonlinear
electromagnetic black holes | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyzed the frequency shifts of photons emitted from massive particles
that move in stable geodesics around black holes with non-linear
electrodynamics. The motion of the photon is modified by an effective metric
when the Einstein gravity is coupled with non-linear electrodynamics. The
kinematic shifts for photon... | [
{
"created": "Fri, 26 Jun 2020 18:47:52 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Jul 2020 18:13:36 GMT",
"version": "v2"
}
] | 2020-07-07 | [
[
"López",
"L. A.",
""
],
[
"Olvera",
"J. C.",
""
]
] | We analyzed the frequency shifts of photons emitted from massive particles that move in stable geodesics around black holes with non-linear electrodynamics. The motion of the photon is modified by an effective metric when the Einstein gravity is coupled with non-linear electrodynamics. The kinematic shifts for photons ... |
1010.2049 | Pankaj S. Joshi | Pankaj S. Joshi | Spacetime Singularities and Cosmic Censorship | 12 pages, 3 figures | null | null | null | gr-qc physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present here a brief review and discussion on recent developments in the
theory of spacetime singularities. After mentioning some key motivations on the
main ideas and concepts involved, we take the approach that the singularities
will be eventually resolved by the quantum gravity effects. Some consequences
are in... | [
{
"created": "Mon, 11 Oct 2010 09:50:13 GMT",
"version": "v1"
}
] | 2010-10-13 | [
[
"Joshi",
"Pankaj S.",
""
]
] | We present here a brief review and discussion on recent developments in the theory of spacetime singularities. After mentioning some key motivations on the main ideas and concepts involved, we take the approach that the singularities will be eventually resolved by the quantum gravity effects. Some consequences are indi... |
1005.3128 | J\"org Hennig | Marcus Ansorg, J\"org Hennig and Carla Cederbaum | Universal properties of distorted Kerr-Newman black holes | 7 pages | Gen.Rel.Grav.43:1205-1210,2011 | 10.1007/s10714-010-1136-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss universal properties of axisymmetric and stationary configurations
consisting of a central black hole and surrounding matter in Einstein-Maxwell
theory. In particular, we find that certain physical equations and inequalities
(involving angular momentum, electric charge and horizon area) are not
restricted ... | [
{
"created": "Tue, 18 May 2010 09:43:39 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Apr 2011 01:25:15 GMT",
"version": "v2"
}
] | 2011-04-28 | [
[
"Ansorg",
"Marcus",
""
],
[
"Hennig",
"Jörg",
""
],
[
"Cederbaum",
"Carla",
""
]
] | We discuss universal properties of axisymmetric and stationary configurations consisting of a central black hole and surrounding matter in Einstein-Maxwell theory. In particular, we find that certain physical equations and inequalities (involving angular momentum, electric charge and horizon area) are not restricted to... |
1102.2587 | Joseph Samuel | Supurna Sinha and Joseph Samuel | Atom Interferometers and the Gravitational Redshift | 18 pages, one figure, improved discussion, corrected typos | null | 10.1088/0264-9381/28/14/145018 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | From the principle of equivalence, Einstein predicted that clocks slow down
in a gravitational field. Since the general theory of relativity is based on
the principle of equivalence, it is essential to test this prediction
accurately. Muller, Peters and Chu claim that a reinterpretation of decade old
experiments with... | [
{
"created": "Sun, 13 Feb 2011 12:41:00 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Mar 2011 13:23:48 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Mar 2011 11:23:09 GMT",
"version": "v3"
},
{
"created": "Mon, 16 May 2011 07:12:51 GMT",
"version": "v4"
}
] | 2015-05-27 | [
[
"Sinha",
"Supurna",
""
],
[
"Samuel",
"Joseph",
""
]
] | From the principle of equivalence, Einstein predicted that clocks slow down in a gravitational field. Since the general theory of relativity is based on the principle of equivalence, it is essential to test this prediction accurately. Muller, Peters and Chu claim that a reinterpretation of decade old experiments with a... |
1205.5125 | Ozay Gurtug | T. Tahamtan and O.Gurtug | Quantum singularities in a model of f(R) Gravity | 12 pages, final version. Accepted for publication in EPJC | The European Physical Journal C 72 (7), 2091 (2012) | 10.1140/epjc/s10052-012-2091-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The formation of a naked singularity in a model of f(R) gravity having as
source a linear electromagnetic field is considered in view of quantum
mechanics. Quantum test fields obeying the Klein-Gordon, Dirac and Maxwell
equations are used to probe the classical timelike naked singularity developed
at r=0. We prove th... | [
{
"created": "Wed, 23 May 2012 08:22:26 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Jul 2012 08:27:37 GMT",
"version": "v2"
}
] | 2012-08-28 | [
[
"Tahamtan",
"T.",
""
],
[
"Gurtug",
"O.",
""
]
] | The formation of a naked singularity in a model of f(R) gravity having as source a linear electromagnetic field is considered in view of quantum mechanics. Quantum test fields obeying the Klein-Gordon, Dirac and Maxwell equations are used to probe the classical timelike naked singularity developed at r=0. We prove that... |
1511.05454 | J. W. van Holten | G. d'Ambrosi, S. Satish Kumar, J. van de Vis, J.W. van Holten | Spinning bodies in curved space-time | 26 pages, 5 figures; v2: version accepted for publication; small
changes in text and references added | Phys. Rev. D 93, 044051 (2016) | 10.1103/PhysRevD.93.044051 | Nikhef/2015-041 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the motion of neutral and charged spinning bodies in curved
space-time in the test-particle limit. We construct equations of motion using a
closed covariant Poisson-Dirac bracket formulation which allows for different
choices of the hamiltonian. We derive conditions for the existence of constants
of motion a... | [
{
"created": "Tue, 17 Nov 2015 16:11:57 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Feb 2016 13:47:51 GMT",
"version": "v2"
}
] | 2016-11-07 | [
[
"d'Ambrosi",
"G.",
""
],
[
"Kumar",
"S. Satish",
""
],
[
"van de Vis",
"J.",
""
],
[
"van Holten",
"J. W.",
""
]
] | We study the motion of neutral and charged spinning bodies in curved space-time in the test-particle limit. We construct equations of motion using a closed covariant Poisson-Dirac bracket formulation which allows for different choices of the hamiltonian. We derive conditions for the existence of constants of motion and... |
2403.15830 | Koray D\"uzta\c{s} | Koray D\"uzta\c{s} | Spin-2 fields and cosmic censorship | 12 pages; no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We evaluate the possibility of the formation of naked singularities in the
interaction of Kerr black holes with test massless spin-2 fields. We analyse
the scattering problem for both extremal and nearly extremal black holes by
incorporating the explicit form of the absorption probabilities. We show that
extremal bla... | [
{
"created": "Sat, 23 Mar 2024 13:13:41 GMT",
"version": "v1"
}
] | 2024-03-26 | [
[
"Düztaş",
"Koray",
""
]
] | We evaluate the possibility of the formation of naked singularities in the interaction of Kerr black holes with test massless spin-2 fields. We analyse the scattering problem for both extremal and nearly extremal black holes by incorporating the explicit form of the absorption probabilities. We show that extremal black... |
1711.01610 | Zahra Mirzaiyan Dehkordi | Elham Sharifian, Behrouz Mirza, Zahra Mirzaiyan | Black holes with toroidal horizons in (d +1)-dimensional space-time | 13 pages, 2 figures | Gen Relativ Gravit (2017) 49:146 | 10.1007/s10714-017-2313-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate black holes with toroidal horizons in (d +1)-dimensional
space-time. Using the solution phase space method, we calculated conserved
charges for these black holes before exploring some features of this metric
including its entropy and thermodynamic quantities. Another aspect of the study
involves obtain... | [
{
"created": "Sun, 5 Nov 2017 16:15:13 GMT",
"version": "v1"
}
] | 2017-11-09 | [
[
"Sharifian",
"Elham",
""
],
[
"Mirza",
"Behrouz",
""
],
[
"Mirzaiyan",
"Zahra",
""
]
] | We investigate black holes with toroidal horizons in (d +1)-dimensional space-time. Using the solution phase space method, we calculated conserved charges for these black holes before exploring some features of this metric including its entropy and thermodynamic quantities. Another aspect of the study involves obtainin... |
gr-qc/0204071 | Toporenskij A. V. | N. Yu. Savchenko, S.V. Savchenko and A. V. Toporensky | Asymptotic states in brane cosmology with a nonlocal anisotropic stress | 13 pages with 2 eps figures | Class.Quant.Grav. 19 (2002) 4923-4932 | 10.1088/0264-9381/19/19/310 | null | gr-qc hep-th | null | We investigate the dynamics of a Bianchi I brane Universe in the presence of
a nonlocal anisotropic stress ${\cal P}_{\mu\nu}$ proportional to a "dark
energy" ${\cal U}$. Using this ansatz for the case ${\cal U} > 0$ we prove that
if a matter on a brane satisfies the equation of state $p=(\gamma-1)\rho$ with
$\gamma ... | [
{
"created": "Mon, 22 Apr 2002 14:30:07 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Savchenko",
"N. Yu.",
""
],
[
"Savchenko",
"S. V.",
""
],
[
"Toporensky",
"A. V.",
""
]
] | We investigate the dynamics of a Bianchi I brane Universe in the presence of a nonlocal anisotropic stress ${\cal P}_{\mu\nu}$ proportional to a "dark energy" ${\cal U}$. Using this ansatz for the case ${\cal U} > 0$ we prove that if a matter on a brane satisfies the equation of state $p=(\gamma-1)\rho$ with $\gamma \l... |
2303.13554 | Hassan Hassanabadi prof. | S. Capozziello, S. Zare, D. F. Mota, H. Hassanabadi | Dark matter spike around Bumblebee black holes | accepted for publication in JCAP | null | 10.1088/1475-7516/2023/05/027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effects of dark matter spike in the vicinity of the supermassive black
hole, located at the center of M87 (the Virgo A galaxy), are investigated
within the framework of the so-called Bumblebee Gravity. Our primary aim is to
determine whether the background of spontaneous Lorentz symmetry breaking has a
significan... | [
{
"created": "Wed, 22 Mar 2023 18:45:56 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Apr 2023 11:29:03 GMT",
"version": "v2"
},
{
"created": "Sun, 23 Apr 2023 22:56:07 GMT",
"version": "v3"
},
{
"created": "Sun, 28 May 2023 13:41:52 GMT",
"version": "v4"
}
] | 2023-05-30 | [
[
"Capozziello",
"S.",
""
],
[
"Zare",
"S.",
""
],
[
"Mota",
"D. F.",
""
],
[
"Hassanabadi",
"H.",
""
]
] | The effects of dark matter spike in the vicinity of the supermassive black hole, located at the center of M87 (the Virgo A galaxy), are investigated within the framework of the so-called Bumblebee Gravity. Our primary aim is to determine whether the background of spontaneous Lorentz symmetry breaking has a significant ... |
1311.0220 | Maxim Eingorn | Alexey Chopovsky, Maxim Eingorn, Alexander Zhuk | Kaluza-Klein multidimensional models with Ricci-flat internal spaces:
the absence of the KK particles | 10 pages, no figures | Advances in High Energy Physics, 106135 (2013) | 10.1155/2013/106135 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider a multidimensional Kaluza-Klein (KK) model with a
Ricci-flat internal space, e.g., a Calabi-Yau manifold. We perturb this
background metrics by a system of gravitating masses, e.g., astrophysical
objects such as our Sun. We suppose that these masses are pressureless in the
external space but... | [
{
"created": "Thu, 31 Oct 2013 14:36:42 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jan 2014 15:47:51 GMT",
"version": "v2"
}
] | 2014-01-10 | [
[
"Chopovsky",
"Alexey",
""
],
[
"Eingorn",
"Maxim",
""
],
[
"Zhuk",
"Alexander",
""
]
] | In this paper we consider a multidimensional Kaluza-Klein (KK) model with a Ricci-flat internal space, e.g., a Calabi-Yau manifold. We perturb this background metrics by a system of gravitating masses, e.g., astrophysical objects such as our Sun. We suppose that these masses are pressureless in the external space but t... |
1403.3560 | Tim-Torben Paetz | Tim-Torben Paetz | Characteristic initial data and smoothness of Scri. II. Asymptotic
expansions and construction of conformally smooth data sets | 53 pages | null | 10.1063/1.4897209 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive necessary-and-sufficient conditions on characteristic initial data
for Friedrich's conformal field equations in $3+1$ dimensions to have no
logarithmic terms in an asymptotic expansion at null infinity.
| [
{
"created": "Fri, 14 Mar 2014 13:01:32 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Paetz",
"Tim-Torben",
""
]
] | We derive necessary-and-sufficient conditions on characteristic initial data for Friedrich's conformal field equations in $3+1$ dimensions to have no logarithmic terms in an asymptotic expansion at null infinity. |
1401.5491 | Vladimir Ivashchuk | V. D. Ivashchuk and V. N. Melnikov | On Time Variations of Gravitational and Yang-Mills Constants in a
Cosmological Model of Superstring Origin | 8 pages, no figures, Latex, to be published in Gravitation and
Cosmology, 2014, Vol. 20, No 1 | Grav. Cosmol. 20, No 1, 26-29 (2014) | 10.1134/S0202289314010046 | IGC-PFUR-2014-01/02 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of 10-dimensional "Friedmann-Calabi-Yau" cosmology of
superstring origin we show that the time variation of either Newton's
gravitational constant or Yang-Mills one is unavoidable in the present epoch.
| [
{
"created": "Tue, 21 Jan 2014 21:17:37 GMT",
"version": "v1"
}
] | 2015-06-18 | [
[
"Ivashchuk",
"V. D.",
""
],
[
"Melnikov",
"V. N.",
""
]
] | In the framework of 10-dimensional "Friedmann-Calabi-Yau" cosmology of superstring origin we show that the time variation of either Newton's gravitational constant or Yang-Mills one is unavoidable in the present epoch. |
1709.08675 | Gabriele Vittorio Stagno | Emanuele Alesci, Gioele Botta and Gabriele V. Stagno | Quantum reduced loop gravity effective Hamiltonians from a statistical
regularization scheme | 22 pages, 4 figures. Two small typos fixed. Conclusions unchanged | Phys. Rev. D 97, 046011 (2018) | 10.1103/PhysRevD.97.046011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a new regularization scheme for Quantum Cosmology in Loop
Quantum Gravity (LQG) using the tools of Quantum Reduced Loop Gravity (QRLG).
It is obtained considering density matrices for superposition of graphs based
on statistical countings of microstates compatible with macroscopic
configurations. We call... | [
{
"created": "Mon, 25 Sep 2017 18:58:47 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Feb 2018 14:15:14 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Feb 2018 13:12:55 GMT",
"version": "v3"
},
{
"created": "Tue, 22 Jan 2019 01:47:40 GMT",
"version": "v4"
}
] | 2019-01-23 | [
[
"Alesci",
"Emanuele",
""
],
[
"Botta",
"Gioele",
""
],
[
"Stagno",
"Gabriele V.",
""
]
] | We introduce a new regularization scheme for Quantum Cosmology in Loop Quantum Gravity (LQG) using the tools of Quantum Reduced Loop Gravity (QRLG). It is obtained considering density matrices for superposition of graphs based on statistical countings of microstates compatible with macroscopic configurations. We call t... |
gr-qc/0611027 | Sean A. Hayward | Sean A. Hayward | Angular momentum conservation for uniformly expanding flows | 5 revtex4 pages, 3 eps figures | Class.Quant.Grav.24:923-930,2007 | 10.1088/0264-9381/24/4/012 | null | gr-qc | null | Angular momentum has recently been defined as a surface integral involving an
axial vector and a twist 1-form, which measures the twisting around of
space-time due to a rotating mass. The axial vector is chosen to be a
transverse, divergence-free, coordinate vector, which is compatible with any
initial choice of axis... | [
{
"created": "Sat, 4 Nov 2006 05:13:38 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Hayward",
"Sean A.",
""
]
] | Angular momentum has recently been defined as a surface integral involving an axial vector and a twist 1-form, which measures the twisting around of space-time due to a rotating mass. The axial vector is chosen to be a transverse, divergence-free, coordinate vector, which is compatible with any initial choice of axis a... |
gr-qc/9402003 | Diego Mazzitelli | D.A.R. Dalvit and F.D. Mazzitelli | Running Coupling Constants, Newtonian Potential and non localities in
the Effective Action | 22 pages, Revtex, preprint GTCRG-94-01 | Phys.Rev. D50 (1994) 1001-1009 | 10.1103/PhysRevD.50.1001 | null | gr-qc hep-th | null | We consider a quantum scalar field on an arbitrary gravitational background.
We obtain the effective {\it in-in} equations for the gravitational fields
using a covariant and non-local approximation for the effective action proposed
by Vilkovisky and collaborators. {}From these equations, we compute the quantum
correc... | [
{
"created": "Mon, 31 Jan 1994 18:59:06 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Dalvit",
"D. A. R.",
""
],
[
"Mazzitelli",
"F. D.",
""
]
] | We consider a quantum scalar field on an arbitrary gravitational background. We obtain the effective {\it in-in} equations for the gravitational fields using a covariant and non-local approximation for the effective action proposed by Vilkovisky and collaborators. {}From these equations, we compute the quantum correcti... |
gr-qc/9805023 | Mijan Huq | Richard A. Matzner, Mijan F. Huq and Deirdre Shoemaker | Initial Data and Coordinates for Multiple Black Hole Systems | null | Phys.Rev. D59 (1999) 024015 | 10.1103/PhysRevD.59.024015 | null | gr-qc | null | We present here an alternative approach to data setting for spacetimes with
multiple moving black holes generalizing the Kerr-Schild form for rotating or
non-rotating single black holes to multiple moving holes. Because this scheme
preserves the Kerr-Schild form near the holes, it selects out the behaviour of
null ra... | [
{
"created": "Thu, 7 May 1998 16:07:06 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Matzner",
"Richard A.",
""
],
[
"Huq",
"Mijan F.",
""
],
[
"Shoemaker",
"Deirdre",
""
]
] | We present here an alternative approach to data setting for spacetimes with multiple moving black holes generalizing the Kerr-Schild form for rotating or non-rotating single black holes to multiple moving holes. Because this scheme preserves the Kerr-Schild form near the holes, it selects out the behaviour of null rays... |
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