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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1310.1318 | Willie Wai-Yeung Wong | Willie Wai-Yeung Wong | A comment on the construction of the maximal globally hyperbolic Cauchy
development | Version 2: 9 (+epsilon; depending on compiler) pages; updated
references. Version 3: switched to revtex, 6 pages, version accepted for
publication | J. Math. Phys. 54, 113511 (2013) | 10.1063/1.4833375 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Under mild assumptions, we remove all traces of the axiom of choice from the
construction of the maximal globally hyperbolic Cauchy development in general
relativity. The construction relies on the notion of direct union manifolds,
which we review. The construction given is very general: any physical theory
with a su... | [
{
"created": "Fri, 4 Oct 2013 15:26:48 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Oct 2013 14:03:18 GMT",
"version": "v2"
},
{
"created": "Wed, 20 Nov 2013 14:57:55 GMT",
"version": "v3"
}
] | 2013-11-28 | [
[
"Wong",
"Willie Wai-Yeung",
""
]
] | Under mild assumptions, we remove all traces of the axiom of choice from the construction of the maximal globally hyperbolic Cauchy development in general relativity. The construction relies on the notion of direct union manifolds, which we review. The construction given is very general: any physical theory with a suit... |
1202.0790 | Andrea Taracchini | Andrea Taracchini, Yi Pan, Alessandra Buonanno, Enrico Barausse,
Michael Boyle, Tony Chu, Geoffrey Lovelace, Harald P. Pfeiffer, Mark A.
Scheel | Prototype effective-one-body model for nonprecessing spinning
inspiral-merger-ringdown waveforms | 20 pages, 8 figures. Minor changes to match version accepted for
publication in PRD | Phys. Rev. D86, 024011 (2012) | 10.1103/PhysRevD.86.024011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We first use five non-spinning and two mildly spinning (chi_i \simeq -0.44,
+0.44) numerical-relativity waveforms of black-hole binaries and calibrate an
effective-one-body (EOB) model for non-precessing spinning binaries, notably
its dynamics and the dominant (2,2) gravitational-wave mode. Then, we combine
the above... | [
{
"created": "Fri, 3 Feb 2012 18:06:36 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Aug 2012 17:39:43 GMT",
"version": "v2"
}
] | 2012-08-22 | [
[
"Taracchini",
"Andrea",
""
],
[
"Pan",
"Yi",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Barausse",
"Enrico",
""
],
[
"Boyle",
"Michael",
""
],
[
"Chu",
"Tony",
""
],
[
"Lovelace",
"Geoffrey",
""
],
[
... | We first use five non-spinning and two mildly spinning (chi_i \simeq -0.44, +0.44) numerical-relativity waveforms of black-hole binaries and calibrate an effective-one-body (EOB) model for non-precessing spinning binaries, notably its dynamics and the dominant (2,2) gravitational-wave mode. Then, we combine the above r... |
1501.07541 | Elizabeth Winstanley | J. Erik Baxter and Elizabeth Winstanley | On the stability of soliton and hairy black hole solutions of
${\mathfrak {su}}(N)$ Einstein-Yang-Mills theory with a negative cosmological
constant | 43 pages, 4 figures, minor changes, discussion expanded and
references updated. Matches version accepted for publication in J. Math. Phys | null | 10.1063/1.4940694 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the stability of spherically symmetric, purely magnetic,
soliton and black hole solutions of four-dimensional ${\mathfrak {su}}(N)$
Einstein-Yang-Mills theory with a negative cosmological constant $\Lambda $.
These solutions are described by $N-1$ magnetic gauge field functions $\omega
_{j}$. We consid... | [
{
"created": "Thu, 29 Jan 2015 18:48:42 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jan 2016 17:25:47 GMT",
"version": "v2"
}
] | 2016-02-17 | [
[
"Baxter",
"J. Erik",
""
],
[
"Winstanley",
"Elizabeth",
""
]
] | We investigate the stability of spherically symmetric, purely magnetic, soliton and black hole solutions of four-dimensional ${\mathfrak {su}}(N)$ Einstein-Yang-Mills theory with a negative cosmological constant $\Lambda $. These solutions are described by $N-1$ magnetic gauge field functions $\omega _{j}$. We consider... |
gr-qc/0006092 | Jerry B. Griffiths | J. Podolsky and J. B. Griffiths | Null limits of generalised Bonnor-Swaminarayan solutions | 13 pages LaTeX 2e. To appear in Gen. Rel. Grav | Gen.Rel.Grav.33:37-57,2001 | 10.1023/A:1002071802044 | null | gr-qc | null | The Bonnor-Swaminarayan solutions are boost-rotation symmetric space-times
which describe the motion of pairs of accelerating particles which are possibly
connected to strings (struts). In an explicit and unified form we present a
generalised class of such solutions with a few new observations. We then
investigate th... | [
{
"created": "Tue, 27 Jun 2000 08:27:54 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Podolsky",
"J.",
""
],
[
"Griffiths",
"J. B.",
""
]
] | The Bonnor-Swaminarayan solutions are boost-rotation symmetric space-times which describe the motion of pairs of accelerating particles which are possibly connected to strings (struts). In an explicit and unified form we present a generalised class of such solutions with a few new observations. We then investigate the ... |
2407.19048 | Deep Chatterjee | Deep Chatterjee and Ethan Marx and William Benoit and Ravi Kumar and
Malina Desai and Ekaterina Govorkova and Alec Gunny and Eric Moreno and Rafia
Omer and Ryan Raikman and Muhammed Saleem and Shrey Aggarwal and Michael W.
Coughlin and Philip Harris and Erik Katsavounidis | Rapid Likelihood Free Inference of Compact Binary Coalescences using
Accelerated Hardware | Submitted to MLST | null | null | null | gr-qc astro-ph.IM cs.LG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report a gravitational-wave parameter estimation algorithm, AMPLFI, based
on likelihood-free inference using normalizing flows. The focus of AMPLFI is to
perform real-time parameter estimation for candidates detected by
machine-learning based compact binary coalescence search, Aframe. We present
details of our alg... | [
{
"created": "Fri, 26 Jul 2024 19:07:18 GMT",
"version": "v1"
}
] | 2024-07-30 | [
[
"Chatterjee",
"Deep",
""
],
[
"Marx",
"Ethan",
""
],
[
"Benoit",
"William",
""
],
[
"Kumar",
"Ravi",
""
],
[
"Desai",
"Malina",
""
],
[
"Govorkova",
"Ekaterina",
""
],
[
"Gunny",
"Alec",
""
],
[
"Mo... | We report a gravitational-wave parameter estimation algorithm, AMPLFI, based on likelihood-free inference using normalizing flows. The focus of AMPLFI is to perform real-time parameter estimation for candidates detected by machine-learning based compact binary coalescence search, Aframe. We present details of our algor... |
1804.09614 | Adam Szereszewski | Denis Dobkowski-Ry{\l}ko, Wojciech Kami\'nski, Jerzy Lewandowski, Adam
Szereszewski | The Petrov type D equation on genus $>0$ sections of isolated horizons | null | null | 10.1016/j.physletb.2018.07.024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Petrov type D equation imposed on the 2-metric tensor and the rotation
scalar of a cross-section of an isolated horizon can be used to uniquely
distinguish the Kerr - (anti) de Sitter spacetime in the case the topology of
the cross-section is that of a sphere. In the current paper we study that
equation on closed... | [
{
"created": "Wed, 25 Apr 2018 15:10:25 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jun 2018 02:57:36 GMT",
"version": "v2"
},
{
"created": "Fri, 13 Jul 2018 01:36:52 GMT",
"version": "v3"
}
] | 2018-08-15 | [
[
"Dobkowski-Ryłko",
"Denis",
""
],
[
"Kamiński",
"Wojciech",
""
],
[
"Lewandowski",
"Jerzy",
""
],
[
"Szereszewski",
"Adam",
""
]
] | The Petrov type D equation imposed on the 2-metric tensor and the rotation scalar of a cross-section of an isolated horizon can be used to uniquely distinguish the Kerr - (anti) de Sitter spacetime in the case the topology of the cross-section is that of a sphere. In the current paper we study that equation on closed 2... |
1107.5878 | Molin Liu | Molin Liu and Junwang Lu | Logarithmic Entropy of Kehagias-Sfetsos black hole with Self-gravitation
in Asymptotically Flat IR Modified Horava Gravity | 9 pages, revtex4 | Phys.Lett.B699:296-300,2011 | 10.1016/j.physletb.2011.04.006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by recent logarithmic entropy of Ho$\check{r}$ava-Lifshitz gravity,
we investigate Hawking radiation for Kehagias-Sfetsos black hole from tunneling
perspective. After considering the effect of self-gravitation, we calculate the
emission rate and entropy of quantum tunneling by using Kraus-Parikh-Wilczek
met... | [
{
"created": "Fri, 29 Jul 2011 06:35:32 GMT",
"version": "v1"
}
] | 2011-09-15 | [
[
"Liu",
"Molin",
""
],
[
"Lu",
"Junwang",
""
]
] | Motivated by recent logarithmic entropy of Ho$\check{r}$ava-Lifshitz gravity, we investigate Hawking radiation for Kehagias-Sfetsos black hole from tunneling perspective. After considering the effect of self-gravitation, we calculate the emission rate and entropy of quantum tunneling by using Kraus-Parikh-Wilczek metho... |
1007.0388 | Gyula Fodor | Gyula Fodor, P\'eter Forg\'acs, M\'ark Mezei | Boson stars and oscillatons in an inflationary universe | 19 pages, 5 figures | Phys.Rev.D82:044043,2010 | 10.1103/PhysRevD.82.044043 | MIT-CTP 6-4161 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spherically symmetric gravitationally bound, oscillating scalar lumps (boson
stars and oscillatons) are considered in Einstein's gravity coupled to massive
scalar fields in 1+D dimensional de Sitter-type inflationary space-times. We
show that due to inflation bosons stars and oscillatons lose mass through
scalar radi... | [
{
"created": "Fri, 2 Jul 2010 15:31:57 GMT",
"version": "v1"
}
] | 2010-09-06 | [
[
"Fodor",
"Gyula",
""
],
[
"Forgács",
"Péter",
""
],
[
"Mezei",
"Márk",
""
]
] | Spherically symmetric gravitationally bound, oscillating scalar lumps (boson stars and oscillatons) are considered in Einstein's gravity coupled to massive scalar fields in 1+D dimensional de Sitter-type inflationary space-times. We show that due to inflation bosons stars and oscillatons lose mass through scalar radiat... |
gr-qc/0702142 | Dragan Hajdukovic | Dragan Slavkov Hajdukovic | Vacuum fluctuations, the size of extra spatial dimensions and
microscopic black holes at CERN | Updated version including a short discussion of the recent results of
the CMS collaboration at CERN | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have suggested, that the size of extra spatial dimensions (if they exist)
should be related to the quantum vacuum fluctuations; an extra dimension must
be sufficiently large to allow appearance of virtual quark-antiquark pairs,
which are an inherent part of the physical vacuum in quantum chromodynamics. We
argue t... | [
{
"created": "Tue, 27 Feb 2007 12:55:59 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Dec 2007 00:08:04 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Sep 2010 11:31:31 GMT",
"version": "v3"
},
{
"created": "Tue, 15 Feb 2011 09:30:54 GMT",
"version": "v4"
}
] | 2011-02-16 | [
[
"Hajdukovic",
"Dragan Slavkov",
""
]
] | We have suggested, that the size of extra spatial dimensions (if they exist) should be related to the quantum vacuum fluctuations; an extra dimension must be sufficiently large to allow appearance of virtual quark-antiquark pairs, which are an inherent part of the physical vacuum in quantum chromodynamics. We argue tha... |
gr-qc/0502078 | Paul O'Hara . D. | Paul O'Hara | Quantum Mechanics and the Metrics of General Relativity | 24 pages, to be published in Foundation of Physics (IARD proc.) | Found.Phys. 35 (2005) 1563-1584 | 10.1007/s10701-005-6483-z | null | gr-qc quant-ph | null | A one-to-one correspondence is established between linearized space-time
metrics of general relativity and the wave equations of quantum mechanics.
Also, the key role of boundary conditions in distinguishing quantum mechanics
from classical mechanics will emerge naturally from the procedure. Finally, we
will find tha... | [
{
"created": "Thu, 17 Feb 2005 18:32:40 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"O'Hara",
"Paul",
""
]
] | A one-to-one correspondence is established between linearized space-time metrics of general relativity and the wave equations of quantum mechanics. Also, the key role of boundary conditions in distinguishing quantum mechanics from classical mechanics will emerge naturally from the procedure. Finally, we will find that ... |
gr-qc/0407049 | Raoul-Martin Memmesheimer | Raoul-Martin Memmesheimer, Achamveedu Gopakumar, Gerhard Sch\"afer | Third post-Newtonian accurate generalized quasi-Keplerian
parametrization for compact binaries in eccentric orbits | 33 pages, 1 figure | Phys.Rev.D70:104011,2004 | 10.1103/PhysRevD.70.104011 | null | gr-qc | null | We present Keplerian-type parametrization for the solution of third
post-Newtonian (3PN) accurate equations of motion for two non-spinning compact
objects moving in an eccentric orbit. The orbital elements of the
parametrization are explicitly given in terms of the 3PN accurate conserved
orbital energy and angular mo... | [
{
"created": "Tue, 13 Jul 2004 16:15:39 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Memmesheimer",
"Raoul-Martin",
""
],
[
"Gopakumar",
"Achamveedu",
""
],
[
"Schäfer",
"Gerhard",
""
]
] | We present Keplerian-type parametrization for the solution of third post-Newtonian (3PN) accurate equations of motion for two non-spinning compact objects moving in an eccentric orbit. The orbital elements of the parametrization are explicitly given in terms of the 3PN accurate conserved orbital energy and angular mome... |
2305.00230 | Arunoday Sarkar | Arunoday Sarkar and Buddhadeb Ghosh | Constraining the quintessential $\alpha$-attractor inflation through
dynamical horizon exit method | 46 pages, 20 figures, 2 tables | Physics of the Dark Universe 41C (2023) 101239 | 10.1016/j.dark.2023.101239 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | In the present paper, we perform a sub-Planckian quantum mode analysis of
linear cosmological perturbation in the inflaton field over a classical quasi
de-Siter metric background by dynamical horizon exit (DHE) method. In this way,
we probe the inflationary regime of a quintessential $\alpha$-attractor model
by analy... | [
{
"created": "Sat, 29 Apr 2023 10:55:24 GMT",
"version": "v1"
}
] | 2023-05-05 | [
[
"Sarkar",
"Arunoday",
""
],
[
"Ghosh",
"Buddhadeb",
""
]
] | In the present paper, we perform a sub-Planckian quantum mode analysis of linear cosmological perturbation in the inflaton field over a classical quasi de-Siter metric background by dynamical horizon exit (DHE) method. In this way, we probe the inflationary regime of a quintessential $\alpha$-attractor model by analysi... |
0803.3430 | Francisco Jose Herranz | Angel Ballesteros, Alberto Enciso, Francisco J. Herranz and Orlando
Ragnisco | Bertrand spacetimes as Kepler/oscillator potentials | 17 pages. Comments on the differences between our results/approach
and those given by Perlick have been added together with three new
references. To appear in Class. Quantum Grav | Class. Quantum Grav. 25 (2008) 165005(13) | 10.1088/0264-9381/25/16/165005 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Perlick's classification of (3+1)-dimensional spherically symmetric and
static spacetimes (\cal M,\eta=-1/V dt^2+g) for which the classical Bertrand
theorem holds [Perlick V Class. Quantum Grav. 9 (1992) 1009] is revisited. For
any Bertrand spacetime (\cal M,\eta) the term V(r) is proven to be either the
intrinsic Ke... | [
{
"created": "Mon, 24 Mar 2008 16:56:03 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Jun 2008 13:50:51 GMT",
"version": "v2"
}
] | 2009-11-13 | [
[
"Ballesteros",
"Angel",
""
],
[
"Enciso",
"Alberto",
""
],
[
"Herranz",
"Francisco J.",
""
],
[
"Ragnisco",
"Orlando",
""
]
] | Perlick's classification of (3+1)-dimensional spherically symmetric and static spacetimes (\cal M,\eta=-1/V dt^2+g) for which the classical Bertrand theorem holds [Perlick V Class. Quantum Grav. 9 (1992) 1009] is revisited. For any Bertrand spacetime (\cal M,\eta) the term V(r) is proven to be either the intrinsic Kepl... |
gr-qc/9910016 | Capozziello salvatore | S. Capozziello, G. Lambiase | Inertial Effects on Neutrino Oscillations | LaTex file, 12 pages, to appear on European Journal of Physics C | Eur.Phys.J.C12:343-347,2000 | 10.1007/s100529900212 | null | gr-qc | null | The inertial effects on neutrino oscillations induced by the acceleration and
angular velocity of a reference frame are calculated. Such effects have been
analyzed in the framework of the solar and atmospheric neutrino problem.
| [
{
"created": "Tue, 5 Oct 1999 17:01:49 GMT",
"version": "v1"
}
] | 2011-09-13 | [
[
"Capozziello",
"S.",
""
],
[
"Lambiase",
"G.",
""
]
] | The inertial effects on neutrino oscillations induced by the acceleration and angular velocity of a reference frame are calculated. Such effects have been analyzed in the framework of the solar and atmospheric neutrino problem. |
1205.5529 | Lee Smolin | Lee Smolin | General relativity as the equation of state of spin foam | 9 pages, Latex, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Building on recent significant results of Frodden, Ghosh and Perez (FGP) and
Bianchi, I present a quantum version of Jacobson's argument that the Einstein
equations emerge as the equation of state of a quantum gravitational system. I
give three criteria a quantum theory of gravity must satisfy if it is to allow
Jacob... | [
{
"created": "Thu, 24 May 2012 19:08:20 GMT",
"version": "v1"
}
] | 2012-05-25 | [
[
"Smolin",
"Lee",
""
]
] | Building on recent significant results of Frodden, Ghosh and Perez (FGP) and Bianchi, I present a quantum version of Jacobson's argument that the Einstein equations emerge as the equation of state of a quantum gravitational system. I give three criteria a quantum theory of gravity must satisfy if it is to allow Jacobso... |
gr-qc/0309070 | Michael Ashley | Michael J. S. L. Ashley (Centre for Gravitational Wave Physics - The
Pennsylvania State University) and Susan M. Scott (The Australian National
University) | Curvature singularities and abstract boundary singularity theorems for
space-time | 11 pages, accepted for publication in Contemporary Mathematics | null | null | null | gr-qc | null | The abstract boundary construction of Scott and Szekeres is a general and
flexible way to define singularities in General Relativity. The abstract
boundary construction also proves of great utility when applied to questions
about more general boundary features of space-time. Within this construction an
essential sing... | [
{
"created": "Mon, 15 Sep 2003 20:52:38 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ashley",
"Michael J. S. L.",
"",
"Centre for Gravitational Wave Physics - The\n Pennsylvania State University"
],
[
"Scott",
"Susan M.",
"",
"The Australian National\n University"
]
] | The abstract boundary construction of Scott and Szekeres is a general and flexible way to define singularities in General Relativity. The abstract boundary construction also proves of great utility when applied to questions about more general boundary features of space-time. Within this construction an essential singul... |
gr-qc/9304046 | null | Lajos Diosi | Unique Quantum Paths by Continuous Diagonalization of the Density
Operator | 8 pages REVTeX | Phys.Lett. 185A (1994) 5-8 | 10.1016/0375-9601(94)90978-4 | null | gr-qc | null | In this short note we show that for a Markovian open quantum system it is
always possible to construct a unique set of perfectly consistent Schmidt
paths, supporting quasi-classicality. Our Schmidt process, elaborated several
years ago, is the $\Delta t\to 0$ limit of the Schmidt chain constructed very
recently by Pa... | [
{
"created": "Sat, 1 May 1993 00:46:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Diosi",
"Lajos",
""
]
] | In this short note we show that for a Markovian open quantum system it is always possible to construct a unique set of perfectly consistent Schmidt paths, supporting quasi-classicality. Our Schmidt process, elaborated several years ago, is the $\Delta t\to 0$ limit of the Schmidt chain constructed very recently by Paz ... |
2310.06023 | Elisa Maggio | Sumanta Chakraborty, Elisa Maggio, Michela Silvestrini, Paolo Pani | Dynamical tidal Love numbers of Kerr-like compact objects | 15+ 11 pages, 7 figures | null | null | null | gr-qc astro-ph.HE hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | We develop a framework to compute the tidal response of a Kerr-like compact
object in terms of its reflectivity, compactness, and spin, both in the static
and the frequency-dependent case. Here we focus on the low-frequency regime,
which can be solved fully analytically. We highlight some remarkable novel
features, i... | [
{
"created": "Mon, 9 Oct 2023 18:00:01 GMT",
"version": "v1"
}
] | 2023-10-11 | [
[
"Chakraborty",
"Sumanta",
""
],
[
"Maggio",
"Elisa",
""
],
[
"Silvestrini",
"Michela",
""
],
[
"Pani",
"Paolo",
""
]
] | We develop a framework to compute the tidal response of a Kerr-like compact object in terms of its reflectivity, compactness, and spin, both in the static and the frequency-dependent case. Here we focus on the low-frequency regime, which can be solved fully analytically. We highlight some remarkable novel features, in ... |
gr-qc/0211101 | H. Vucetich | Daniel Sudarsky, Luis Urrutia and H\'ector Vucetich | Bounds on Stringy Quantum Gravity from Low Energy Existing Data | 12 pages, RevTeX. Revised version | Phys.Rev. D68 (2003) 024010 | 10.1103/PhysRevD.68.024010 | null | gr-qc astro-ph hep-ph | null | We show that existing low energy experiments, searching for the breaking of
local Lorentz invariance, set bounds upon string theory inspired quantum
gravity models that induce corrections to the propagation of fields. In the
D-particle recoil model we find M > 1.2 x 10^5 M_P and v < 2 x 10^{-27}c for
the mass and rec... | [
{
"created": "Thu, 28 Nov 2002 23:02:22 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Mar 2003 16:18:52 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Sudarsky",
"Daniel",
""
],
[
"Urrutia",
"Luis",
""
],
[
"Vucetich",
"Héctor",
""
]
] | We show that existing low energy experiments, searching for the breaking of local Lorentz invariance, set bounds upon string theory inspired quantum gravity models that induce corrections to the propagation of fields. In the D-particle recoil model we find M > 1.2 x 10^5 M_P and v < 2 x 10^{-27}c for the mass and recoi... |
1707.01042 | Christopher Gallagher | Sophia R. Goldberg, Christopher Gallagher, Timothy Clifton | Perturbation theory for cosmologies with non-linear structure | "21 pages, 2 appendices. Equations (29) and (80) have been corrected
from the published version." | Phys. Rev. D 96, 103508 (2017) | 10.1103/PhysRevD.96.103508 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The next generation of cosmological surveys will operate over unprecedented
scales, and will therefore provide exciting new opportunities for testing
general relativity. The standard method for modelling the structures that these
surveys will observe is to use cosmological perturbation theory for linear
structures on... | [
{
"created": "Tue, 4 Jul 2017 15:41:43 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Jul 2017 11:25:26 GMT",
"version": "v2"
},
{
"created": "Fri, 4 Aug 2017 13:01:09 GMT",
"version": "v3"
},
{
"created": "Mon, 14 Aug 2017 13:07:02 GMT",
"version": "v4"
},
{
"cre... | 2018-03-28 | [
[
"Goldberg",
"Sophia R.",
""
],
[
"Gallagher",
"Christopher",
""
],
[
"Clifton",
"Timothy",
""
]
] | The next generation of cosmological surveys will operate over unprecedented scales, and will therefore provide exciting new opportunities for testing general relativity. The standard method for modelling the structures that these surveys will observe is to use cosmological perturbation theory for linear structures on h... |
1908.02152 | Sunil Kumar Tripathy Dr. | B. Mishra, S. K. Tripathy and Sankarsan Tarai | Accelerating models with a hybrid scale factor in extended gravity | 14 pages, 8 figures | J. Astrophys. Astr. (2021) 42:2 | 10.1007/s12036-020-09655-6 | null | gr-qc cs.NA hep-th math.NA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamical aspects of cosmological model in an extended gravity theory have
been investigated in the present work. We have adopted a simplified approach to
obtain cosmic features, which in fact requires more involved calculations. A
cosmological model is constructed using a hybrid scale factor that simulates a
cosmic ... | [
{
"created": "Mon, 5 Aug 2019 16:35:38 GMT",
"version": "v1"
}
] | 2021-06-10 | [
[
"Mishra",
"B.",
""
],
[
"Tripathy",
"S. K.",
""
],
[
"Tarai",
"Sankarsan",
""
]
] | Dynamical aspects of cosmological model in an extended gravity theory have been investigated in the present work. We have adopted a simplified approach to obtain cosmic features, which in fact requires more involved calculations. A cosmological model is constructed using a hybrid scale factor that simulates a cosmic tr... |
1503.03036 | Arne Grenzebach | Arne Grenzebach, Volker Perlick, Claus L\"ammerzahl | Photon Regions and Shadows of Accelerated Black Holes | 21 pages, 7 figures; section 5 added | Int. J. Mod. Phys. D 24, 154024 (2015) | 10.1142/S0218271815420249 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In an earlier paper we have analytically determined the photon regions and
the shadows of black holes of the Pleba\'nski class of metrics which are also
known as the Kerr--Newman--NUT--(anti-)deSitter metrics. These metrics are
characterized by six parameters: mass, spin, electric and magnetic charge,
gravitomagnetic... | [
{
"created": "Tue, 10 Mar 2015 19:05:55 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Mar 2015 12:57:58 GMT",
"version": "v2"
}
] | 2015-10-27 | [
[
"Grenzebach",
"Arne",
""
],
[
"Perlick",
"Volker",
""
],
[
"Lämmerzahl",
"Claus",
""
]
] | In an earlier paper we have analytically determined the photon regions and the shadows of black holes of the Pleba\'nski class of metrics which are also known as the Kerr--Newman--NUT--(anti-)deSitter metrics. These metrics are characterized by six parameters: mass, spin, electric and magnetic charge, gravitomagnetic N... |
1911.05436 | Morteza Kerachian | Morteza Kerachian | Uniformly accelerated traveler in an FLRW universe | 11 pages, 6 figures | Phys. Rev. D 101, 083536 (2020) | 10.1103/PhysRevD.101.083536 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper provides an analytical treatment of accelerated and geodesic
motion within the framework of the Friedmann -Lemaitre-Robertson-Walker (FLRW)
spacetime. By employing conformal time transformations we manage to convert
second order differential equations of motion in FLRW spacetime to first order
equations in... | [
{
"created": "Wed, 13 Nov 2019 13:05:08 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Apr 2020 22:27:57 GMT",
"version": "v2"
}
] | 2020-04-28 | [
[
"Kerachian",
"Morteza",
""
]
] | This paper provides an analytical treatment of accelerated and geodesic motion within the framework of the Friedmann -Lemaitre-Robertson-Walker (FLRW) spacetime. By employing conformal time transformations we manage to convert second order differential equations of motion in FLRW spacetime to first order equations in t... |
gr-qc/0403012 | Martin Zofka | J. Bicak, T. Ledvinka, B. G. Schmidt, M. Zofka | Static fluid cylinders and their fields: global solutions | null | Class.Quant.Grav. 21 (2004) 1583-1608 | 10.1088/0264-9381/21/6/019 | null | gr-qc | null | The global properties of static perfect-fluid cylinders and their external
Levi-Civita fields are studied both analytically and numerically. The existence
and uniqueness of global solutions is demonstrated for a fairly general
equation of state of the fluid. In the case of a fluid admitting a
non-vanishing density fo... | [
{
"created": "Tue, 2 Mar 2004 15:50:29 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Bicak",
"J.",
""
],
[
"Ledvinka",
"T.",
""
],
[
"Schmidt",
"B. G.",
""
],
[
"Zofka",
"M.",
""
]
] | The global properties of static perfect-fluid cylinders and their external Levi-Civita fields are studied both analytically and numerically. The existence and uniqueness of global solutions is demonstrated for a fairly general equation of state of the fluid. In the case of a fluid admitting a non-vanishing density for ... |
2407.11693 | Reed Essick | Reed Essick, Daniel E. Holz | When to Sweat the Small Stuff: identifying the most informative events
from ground-based gravitational-wave detectors | 10 pages, 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore scaling relations for the information carried by individual
events, and how that information accumulates in catalogs like those from
ground-based gravitational-wave detectors. For a variety of situations, the
larger number of quiet/distant signals dominates the overall information over
the fewer loud/close... | [
{
"created": "Tue, 16 Jul 2024 13:07:20 GMT",
"version": "v1"
}
] | 2024-07-17 | [
[
"Essick",
"Reed",
""
],
[
"Holz",
"Daniel E.",
""
]
] | We explore scaling relations for the information carried by individual events, and how that information accumulates in catalogs like those from ground-based gravitational-wave detectors. For a variety of situations, the larger number of quiet/distant signals dominates the overall information over the fewer loud/close s... |
2205.11639 | James Wheeler | James Wheeler | Generic Naked Singularities in Vaidya Spacetimes | 10 pages, 1 figure | Class. Quantum Grav. 39 197001 (2022) | 10.1088/1361-6382/ac89c7 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the occurrence of naked singularities, local and global, in
the incoming Vaidya spacetimes with zero initial mass. While it is well-known
that these spacetimes admit locally and globally naked singularities, we
demonstrate that globally naked singularities are significantly more common
than is stressed... | [
{
"created": "Mon, 23 May 2022 21:26:33 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Sep 2022 15:33:41 GMT",
"version": "v2"
}
] | 2022-09-20 | [
[
"Wheeler",
"James",
""
]
] | We investigate the occurrence of naked singularities, local and global, in the incoming Vaidya spacetimes with zero initial mass. While it is well-known that these spacetimes admit locally and globally naked singularities, we demonstrate that globally naked singularities are significantly more common than is stressed i... |
gr-qc/9412006 | Monica Pierri | A. Corichi and M. Pierri | Gravity and Geometric Phases | 11 pages, latex file | Phys.Rev. D51 (1995) 5870-5875 | 10.1103/PhysRevD.51.5870 | CGPG-94/12-1 | gr-qc hep-th quant-ph | null | The behavior of a quantum test particle satisfying the Klein-Gordon equation
in a certain class of 4 dimensional stationary space-times is examined. In a
space-time of a spinning cosmic string, the wave function of a particle in a
box is shown to acquire a geometric phase when the box is transported around a
closed p... | [
{
"created": "Thu, 1 Dec 1994 20:03:50 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Corichi",
"A.",
""
],
[
"Pierri",
"M.",
""
]
] | The behavior of a quantum test particle satisfying the Klein-Gordon equation in a certain class of 4 dimensional stationary space-times is examined. In a space-time of a spinning cosmic string, the wave function of a particle in a box is shown to acquire a geometric phase when the box is transported around a closed pat... |
2310.07228 | Ioannis Soranidis | Ioannis Soranidis | Euclidean methods and phase transitions for the strongest deformations
compatible with Schwarzschild asymptotics | 23 pages, 11 figures, 1 table. Published version. Comments welcome! | Phys. Rev. D 109, 044041 (2024) | 10.1103/PhysRevD.109.044041 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the thermodynamic properties of a regular black
hole model which exhibits the most significant subleading corrections to the
Schwarzchild asymptotic behavior, in the context of general relativity, using
the Euclidean path integral approach. We review the derivation of the
Lagrangian for ... | [
{
"created": "Wed, 11 Oct 2023 06:32:44 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Feb 2024 22:16:32 GMT",
"version": "v2"
}
] | 2024-02-23 | [
[
"Soranidis",
"Ioannis",
""
]
] | In this paper, we investigate the thermodynamic properties of a regular black hole model which exhibits the most significant subleading corrections to the Schwarzchild asymptotic behavior, in the context of general relativity, using the Euclidean path integral approach. We review the derivation of the Lagrangian for th... |
1105.1992 | Santiago Torres | Enrique Garc\'ia-Berro, Pablo Lor\'en-Aguilar, Santiago Torres,
Leandro G. Althaus and Jordi Isern | An upper limit to the secular variation of the gravitational constant
from white dwarf stars | 15 pages, 4 figures, accepted for publication in JCAP | null | 10.1088/1475-7516/2011/05/021 | null | gr-qc astro-ph.CO astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A variation of the gravitational constant over cosmological ages modifies the
main sequence lifetimes and white dwarf cooling ages. Using an state-of-the-art
stellar evolutionary code we compute the effects of a secularly varying G on
the main sequence ages and, employing white dwarf cooling ages computed taking
into... | [
{
"created": "Tue, 10 May 2011 16:29:39 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"García-Berro",
"Enrique",
""
],
[
"Lorén-Aguilar",
"Pablo",
""
],
[
"Torres",
"Santiago",
""
],
[
"Althaus",
"Leandro G.",
""
],
[
"Isern",
"Jordi",
""
]
] | A variation of the gravitational constant over cosmological ages modifies the main sequence lifetimes and white dwarf cooling ages. Using an state-of-the-art stellar evolutionary code we compute the effects of a secularly varying G on the main sequence ages and, employing white dwarf cooling ages computed taking into a... |
2301.01070 | Tamanna Jain | Tamanna Jain | Nonlocal-in-time effective one body Hamiltonian in scalar-tensor gravity
at third post-Newtonian order | 8 Pages | null | 10.1103/PhysRevD.107.084018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We complete the nonlocal-in-time effective-one-body (EOB) formalism of
conservative dynamics for massless Scalar-Tensor (ST) theories at third
post-Newtonian (PN) order. The nonlocal-in-time EOB Hamiltonian is obtained by
mapping the order-reduced Hamiltonian corresponding to the nonlocal-in-time
Lagrangian derived i... | [
{
"created": "Tue, 3 Jan 2023 12:51:21 GMT",
"version": "v1"
}
] | 2023-04-26 | [
[
"Jain",
"Tamanna",
""
]
] | We complete the nonlocal-in-time effective-one-body (EOB) formalism of conservative dynamics for massless Scalar-Tensor (ST) theories at third post-Newtonian (PN) order. The nonlocal-in-time EOB Hamiltonian is obtained by mapping the order-reduced Hamiltonian corresponding to the nonlocal-in-time Lagrangian derived in ... |
1612.01945 | Marcelo Schiffer | Marcelo Schiffer | Black Hole Area Quantization rule from Black Hole Mass Fluctuations | We just submitted a manuscript which contains the previous one as
particular case | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the black hole mass distribution function that follows from the
random emission of quanta by Hawking radiation and with this function we
calculate the black hole mass fluctuation. From a complete different
perspective we regard the black hole as quantum mechanical system with a
quantized event horizon ar... | [
{
"created": "Tue, 6 Dec 2016 18:44:29 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Mar 2020 13:06:17 GMT",
"version": "v2"
}
] | 2020-03-10 | [
[
"Schiffer",
"Marcelo",
""
]
] | We calculate the black hole mass distribution function that follows from the random emission of quanta by Hawking radiation and with this function we calculate the black hole mass fluctuation. From a complete different perspective we regard the black hole as quantum mechanical system with a quantized event horizon area... |
gr-qc/9608025 | Simon Brian Davis | Simon Davis | Symmetric Variations of the Metric and Extrema of the Action for Pure
Gravity | 34 pages, TeX. Additional remarks concerning the gravitational action
are included in section 4 | Gen.Rel.Grav. 30 (1998) 345-377 | 10.1023/A:1018898407507 | DAMTP-R/96/7 | gr-qc | null | Symmetries of generalized gravitational actions, yielding field equations
which typically involve at most second-order derivatives of the metric, are
considered. The field equations for several different higher-derivative
theories in the first-order formalism are derived, and variations of a generic
set of higher-ord... | [
{
"created": "Sat, 10 Aug 1996 08:35:54 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Sep 1996 11:05:00 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Sep 1996 16:44:00 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Davis",
"Simon",
""
]
] | Symmetries of generalized gravitational actions, yielding field equations which typically involve at most second-order derivatives of the metric, are considered. The field equations for several different higher-derivative theories in the first-order formalism are derived, and variations of a generic set of higher-order... |
1610.09525 | Olga Babourova Valer'evna | O.V. Babourova, B.N. Frolov, P.E. Kudlaev, E.V. Romanova | Spherically symmetric solution of the Weyl-Dirac theory of gravitation
and possible influence of dark matter on the interplanetary spacecraft motion | 9 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Poincare and Poincare-Weyl gauge theories of gravitation with Lagrangians
quadratic on curvature and torsion in post-Riemannian spaces with the Dirac
scalar field is discussed in a historical aspect. The various hypothesizes
concerning the models of a dark matter with the help of a scalar field are
considered. Th... | [
{
"created": "Sat, 29 Oct 2016 15:18:49 GMT",
"version": "v1"
}
] | 2016-11-01 | [
[
"Babourova",
"O. V.",
""
],
[
"Frolov",
"B. N.",
""
],
[
"Kudlaev",
"P. E.",
""
],
[
"Romanova",
"E. V.",
""
]
] | The Poincare and Poincare-Weyl gauge theories of gravitation with Lagrangians quadratic on curvature and torsion in post-Riemannian spaces with the Dirac scalar field is discussed in a historical aspect. The various hypothesizes concerning the models of a dark matter with the help of a scalar field are considered. The ... |
gr-qc/0305026 | Stephen C. Anco | Stephen C. Anco | Parity violating spin-two gauge theories | 17 pages | Phys.Rev. D67 (2003) 124007 | 10.1103/PhysRevD.67.124007 | null | gr-qc | null | Nonlinear covariant parity-violating deformations of free spin-two gauge
theory are studied in n>2 spacetime dimensions, using a linearized frame and
spin-connection formalism, for a set of massless spin-two fields. It is shown
that the only such deformations yielding field equations with a second order
quasilinear f... | [
{
"created": "Tue, 6 May 2003 15:40:23 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Anco",
"Stephen C.",
""
]
] | Nonlinear covariant parity-violating deformations of free spin-two gauge theory are studied in n>2 spacetime dimensions, using a linearized frame and spin-connection formalism, for a set of massless spin-two fields. It is shown that the only such deformations yielding field equations with a second order quasilinear for... |
1209.5471 | Muhammad Sharif | M. Sharif and Neelum Bashir | Effects of Electromagnetic Field on Energy Density Inhomogeneity in
Self-Gravitating Fluids | 16 pages, no figure | Gen. Relativ. Gravit. 44(2012)1725-1737 | 10.1007/s10714-012-1362-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to study the effects of electromagnetic field on the
energy density inhomogeneity in the relativistic self-gravitating fluids for
spherically symmetric spacetime. Two important equations of the Weyl tensor are
formulated which help to analyze the energy density inhomogeneity in this
scenario. We... | [
{
"created": "Tue, 25 Sep 2012 02:23:58 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Sharif",
"M.",
""
],
[
"Bashir",
"Neelum",
""
]
] | This paper is devoted to study the effects of electromagnetic field on the energy density inhomogeneity in the relativistic self-gravitating fluids for spherically symmetric spacetime. Two important equations of the Weyl tensor are formulated which help to analyze the energy density inhomogeneity in this scenario. We i... |
2101.07817 | Costantino Pacilio | Swetha Bhagwat, Costantino Pacilio | Merger-Ringdown Consistency: A New Test of Strong Gravity using Deep
Learning | 10 pages, 8 figures; v4: matches published version | Phys. Rev. D 104, 024030 (2021) | 10.1103/PhysRevD.104.024030 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The gravitational waves emitted during the coalescence of binary black holes
are an excellent probe to test the behaviour of strong gravity. In this paper,
we propose a new test called the `merger-ringdown consistency test` that
focuses on probing the imprints of the dynamics in strong-gravity around the
black-holes ... | [
{
"created": "Tue, 19 Jan 2021 19:02:06 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Feb 2021 17:14:19 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Feb 2021 17:21:44 GMT",
"version": "v3"
},
{
"created": "Mon, 12 Jul 2021 12:32:41 GMT",
"version": "v4"
}
] | 2021-07-13 | [
[
"Bhagwat",
"Swetha",
""
],
[
"Pacilio",
"Costantino",
""
]
] | The gravitational waves emitted during the coalescence of binary black holes are an excellent probe to test the behaviour of strong gravity. In this paper, we propose a new test called the `merger-ringdown consistency test` that focuses on probing the imprints of the dynamics in strong-gravity around the black-holes du... |
1010.1861 | Marko Vojinovic | Milovan Vasilic, Marko Vojinovic | Spinning branes in Riemann-Cartan spacetime | null | Phys.Rev.D78:104002,2008 | 10.1103/PhysRevD.78.104002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the conservation law of the stress-energy and spin tensors to study
the motion of massive brane-like objects in Riemann-Cartan geometry. The
world-sheet equations and boundary conditions are obtained in a manifestly
covariant form. In the particle case, the resultant world-line equations turn
out to exhibit a ... | [
{
"created": "Sat, 9 Oct 2010 18:01:44 GMT",
"version": "v1"
}
] | 2010-10-12 | [
[
"Vasilic",
"Milovan",
""
],
[
"Vojinovic",
"Marko",
""
]
] | We use the conservation law of the stress-energy and spin tensors to study the motion of massive brane-like objects in Riemann-Cartan geometry. The world-sheet equations and boundary conditions are obtained in a manifestly covariant form. In the particle case, the resultant world-line equations turn out to exhibit a no... |
1903.04444 | Christian Pfeifer | Christian Pfeifer | Observers' measurements of time and length in premetric electrodynamics | Contribution to the Proceedings, 15th Marcel Grossmann Meeting on
Recent Developments in Theoretical and Experimental General Relativity,
Astrophysics, and Relativistic Field Theories (MG15) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The notion of observers' and their measurements is closely tied to the
Lorentzian metric geometry of spacetime, which in turn has its roots in the
symmetries of Maxwell's theory of electrodynamics. Modifying either the one,
the other, or both ingredients to our modern understanding of physics, requires
also a reformu... | [
{
"created": "Mon, 11 Mar 2019 17:07:53 GMT",
"version": "v1"
}
] | 2019-03-12 | [
[
"Pfeifer",
"Christian",
""
]
] | The notion of observers' and their measurements is closely tied to the Lorentzian metric geometry of spacetime, which in turn has its roots in the symmetries of Maxwell's theory of electrodynamics. Modifying either the one, the other, or both ingredients to our modern understanding of physics, requires also a reformula... |
2405.01024 | Richard Woodard | S. P. Miao (NCKU), N. C. Tsamis (U. of Crete) and R. P. Woodard (U. of
Florida) | Summing Gravitational Effects from Loops of Inflationary Scalars | 26 pages, 1 Table, uses LaTeX2e | null | null | CCTP-2024-7, UFIFT-QG-24-04 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We develop a procedure for re-summing the large logarithms induced in gravity
by loops of inflationary scalars. We first show how the scalar can be
integrated out of the field equations in the presence of constant graviton
field. We then extend this result to a fully conserved form which explains the
need for a finit... | [
{
"created": "Thu, 2 May 2024 05:47:44 GMT",
"version": "v1"
}
] | 2024-05-03 | [
[
"Miao",
"S. P.",
"",
"NCKU"
],
[
"Tsamis",
"N. C.",
"",
"U. of Crete"
],
[
"Woodard",
"R. P.",
"",
"U. of\n Florida"
]
] | We develop a procedure for re-summing the large logarithms induced in gravity by loops of inflationary scalars. We first show how the scalar can be integrated out of the field equations in the presence of constant graviton field. We then extend this result to a fully conserved form which explains the need for a finite ... |
2206.00658 | William Barker Mr | W. E. V. Barker | Supercomputers against strong coupling in gravity with curvature and
torsion | 28 pages, 1 figure | null | 10.1140/epjc/s10052-023-11179-6 | null | gr-qc physics.comp-ph | http://creativecommons.org/licenses/by/4.0/ | Many theories of gravity are spoiled by strongly coupled modes: the high
computational cost of Hamiltonian analysis can obstruct the identification of
these modes. A computer algebra implementation of the Hamiltonian constraint
algorithm for curvature and torsion theories is presented. These non-Riemannian
or Poincar... | [
{
"created": "Wed, 1 Jun 2022 17:51:54 GMT",
"version": "v1"
}
] | 2023-04-05 | [
[
"Barker",
"W. E. V.",
""
]
] | Many theories of gravity are spoiled by strongly coupled modes: the high computational cost of Hamiltonian analysis can obstruct the identification of these modes. A computer algebra implementation of the Hamiltonian constraint algorithm for curvature and torsion theories is presented. These non-Riemannian or Poincar\'... |
0902.3153 | Luca Izzo | M. De Laurentis, S. Capozziello, L. Izzo | Stochastic background of gravitational waves "tuned" by $f(R)$ gravity | 5 pages, to appear in the Proceedings of the 3rd Stueckelberg
Workshop, July 2008, Pescara - Italy | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmological background of gravitational waves can be tuned by Extended
Theories of Gravity. In particular, it can be shown that assuming a generic
function $f(R)$ of the Ricci scalar $R$ gives a parametric approach to control
the evolution and the production mechanism of gravitational waves in the early
Universe... | [
{
"created": "Wed, 18 Feb 2009 14:27:34 GMT",
"version": "v1"
}
] | 2009-02-19 | [
[
"De Laurentis",
"M.",
""
],
[
"Capozziello",
"S.",
""
],
[
"Izzo",
"L.",
""
]
] | The cosmological background of gravitational waves can be tuned by Extended Theories of Gravity. In particular, it can be shown that assuming a generic function $f(R)$ of the Ricci scalar $R$ gives a parametric approach to control the evolution and the production mechanism of gravitational waves in the early Universe. |
1910.12644 | Steven L. Liebling | Steven L. Liebling | Maxwell-dilaton dynamics | 6 pages, 6 figures | Phys. Rev. D 100, 104040 (2019) | 10.1103/PhysRevD.100.104040 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of Maxwell-dilaton theory in Minkowski spacetime are studied
using fully nonlinear, numerical evolutions. This model represents the
flat-space sector of Einstein-Maxwell-Dilaton theory which has attracted
interest recently because it is a well-posed alternative to general relativity,
and it also represen... | [
{
"created": "Mon, 28 Oct 2019 13:08:30 GMT",
"version": "v1"
}
] | 2019-11-27 | [
[
"Liebling",
"Steven L.",
""
]
] | The dynamics of Maxwell-dilaton theory in Minkowski spacetime are studied using fully nonlinear, numerical evolutions. This model represents the flat-space sector of Einstein-Maxwell-Dilaton theory which has attracted interest recently because it is a well-posed alternative to general relativity, and it also represents... |
gr-qc/0407053 | Schmidt H.-J. | H.-J. Schmidt | Gravitoelectromagnetism and other decompositions of the Riemann tensor | 6 pages, no figure, LaTeX, submitted for publication | Phys.Rev.D83:083513,2011 | 10.1103/PhysRevD.83.083513 | null | gr-qc | null | We present gravitoelectromagnetism and other decompositions of the Riemann
tensor from the differential-geometrical point of view.
| [
{
"created": "Wed, 14 Jul 2004 12:58:52 GMT",
"version": "v1"
}
] | 2011-07-26 | [
[
"Schmidt",
"H. -J.",
""
]
] | We present gravitoelectromagnetism and other decompositions of the Riemann tensor from the differential-geometrical point of view. |
1905.03045 | Sam Patrick | Sam Patrick, Harry Goodhew, Cisco Gooding, Silke Weinfurtner | Backreaction in an analogue black hole experiment | 10 pages, 2 figures | Phys. Rev. Lett. 126, 041105 (2021) | 10.1103/PhysRevLett.126.041105 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In general relativity, the interaction between a black hole and the fields
around it (a process known as backreaction) proceeds via the evolution of the
black holes mass and angular momentum. Analogue models of gravity, particularly
fluid mechanical analogues, have been very successful in mimicking the
propagation of... | [
{
"created": "Wed, 8 May 2019 12:45:43 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jul 2020 19:36:14 GMT",
"version": "v2"
}
] | 2021-02-03 | [
[
"Patrick",
"Sam",
""
],
[
"Goodhew",
"Harry",
""
],
[
"Gooding",
"Cisco",
""
],
[
"Weinfurtner",
"Silke",
""
]
] | In general relativity, the interaction between a black hole and the fields around it (a process known as backreaction) proceeds via the evolution of the black holes mass and angular momentum. Analogue models of gravity, particularly fluid mechanical analogues, have been very successful in mimicking the propagation of f... |
2112.06894 | Oleg Novikov | Oleg O. Novikov, Arina M. Shtennikova | Quantum decoherence of the homogeneous modes during inflation | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this short note we consider the decoherence of the minisuperspace
background degrees of freedom due to the long wavelength scalar and tensor
perturbations becoming unobservable within the Born-Oppenheimer approach to the
quantum gravity. We apply this to the power law inflation model.
| [
{
"created": "Mon, 13 Dec 2021 18:51:46 GMT",
"version": "v1"
}
] | 2021-12-14 | [
[
"Novikov",
"Oleg O.",
""
],
[
"Shtennikova",
"Arina M.",
""
]
] | In this short note we consider the decoherence of the minisuperspace background degrees of freedom due to the long wavelength scalar and tensor perturbations becoming unobservable within the Born-Oppenheimer approach to the quantum gravity. We apply this to the power law inflation model. |
1509.01296 | David Garfinkle | Lydia Bieri, David Garfinkle and Shing-Tung Yau | Gravitational wave memory in de Sitter spacetime | null | Phys. Rev. D 94, 064040 (2016) | 10.1103/PhysRevD.94.064040 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine gravitational wave memory in the case where sources and detector
are in an expanding cosmology. For simplicity, we treat the case where the
cosmology is de Sitter spacetime, and discuss the possibility of generalizing
our results to the case of a more realistic cosmology. We find results very
similar to th... | [
{
"created": "Thu, 3 Sep 2015 22:35:47 GMT",
"version": "v1"
}
] | 2016-09-21 | [
[
"Bieri",
"Lydia",
""
],
[
"Garfinkle",
"David",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | We examine gravitational wave memory in the case where sources and detector are in an expanding cosmology. For simplicity, we treat the case where the cosmology is de Sitter spacetime, and discuss the possibility of generalizing our results to the case of a more realistic cosmology. We find results very similar to thos... |
0906.2433 | Laura Cadonati | Laura Cadonati, Shourov Chatterji, Sebastian Fischetti, Gianluca
Guidi, Satyanarayan R. P. Mohapatra, Riccardo Sturani, Andrea Vicer\'e | Un-modeled search for black hole binary systems in the NINJA project | 12 pages, 9 figures Proceedings of the 13th Gravitational Wave Data
Analysis Workshop San Juan, Puerto Rico, January 19-22, 2009 | Class.Quant.Grav.26:204005,2009 | 10.1088/0264-9381/26/20/204005 | LIGO Document Control Center Number P0900068 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational wave signature from binary black hole coalescences is an
important target for LIGO and VIRGO. The Numerical INJection Analysis (NINJA)
project brought together the numerical relativity and gravitational wave data
analysis communities, with the goal to optimize the detectability of these
events. In i... | [
{
"created": "Fri, 12 Jun 2009 23:27:17 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Oct 2010 19:00:31 GMT",
"version": "v2"
}
] | 2010-10-27 | [
[
"Cadonati",
"Laura",
""
],
[
"Chatterji",
"Shourov",
""
],
[
"Fischetti",
"Sebastian",
""
],
[
"Guidi",
"Gianluca",
""
],
[
"Mohapatra",
"Satyanarayan R. P.",
""
],
[
"Sturani",
"Riccardo",
""
],
[
"Viceré",
"A... | The gravitational wave signature from binary black hole coalescences is an important target for LIGO and VIRGO. The Numerical INJection Analysis (NINJA) project brought together the numerical relativity and gravitational wave data analysis communities, with the goal to optimize the detectability of these events. In its... |
gr-qc/0505027 | Giovanni Montani | R. Benini, A.A. Kirillov, G. Montani | Oscillatory regime in the Multidimensional Homogeneous Cosmological
Models Induced by a Vector Field | 9 pages, published on Classical and Quantum Gravity | Class.Quant.Grav. 22 (2005) 1483-1491 | 10.1088/0264-9381/22/7/018 | null | gr-qc | null | We show that in multidimensional gravity vector fields completely determine
the structure and properties of singularity. It turns out that in the presence
of a vector field the oscillatory regime exists in all spatial dimensions and
for all homogeneous models. By analyzing the Hamiltonian equations we derive
the Poin... | [
{
"created": "Fri, 6 May 2005 10:40:29 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Benini",
"R.",
""
],
[
"Kirillov",
"A. A.",
""
],
[
"Montani",
"G.",
""
]
] | We show that in multidimensional gravity vector fields completely determine the structure and properties of singularity. It turns out that in the presence of a vector field the oscillatory regime exists in all spatial dimensions and for all homogeneous models. By analyzing the Hamiltonian equations we derive the Poinca... |
gr-qc/0012102 | Yuri N. Obukhov | Yuri N. Obukhov | Spin, gravity, and inertia | Revtex, 12 pages, no figures, accepted in Phys. Rev. Lett | Phys.Rev.Lett.86:192-195,2001 | 10.1103/PhysRevLett.86.192 | null | gr-qc hep-th | null | The gravitational effects in the relativistic quantum mechanics are
investigated. The exact Foldy-Wouthuysen transformation is constructed for the
Dirac particle coupled to the static spacetime metric. As a direct application,
we analyze the non-relativistic limit of the theory. The new term describing
the specific s... | [
{
"created": "Thu, 28 Dec 2000 01:07:07 GMT",
"version": "v1"
}
] | 2011-08-17 | [
[
"Obukhov",
"Yuri N.",
""
]
] | The gravitational effects in the relativistic quantum mechanics are investigated. The exact Foldy-Wouthuysen transformation is constructed for the Dirac particle coupled to the static spacetime metric. As a direct application, we analyze the non-relativistic limit of the theory. The new term describing the specific spi... |
gr-qc/0411124 | James E. Lidsey | James E. Lidsey | Early Universe Dynamics in Semi-Classical Loop Quantum Cosmology | 14 pages, In Press, JCAP | JCAP 0412 (2004) 007 | 10.1088/1475-7516/2004/12/007 | null | gr-qc astro-ph hep-th | null | Within the framework of loop quantum cosmology, there exists a semi-classical
regime where spacetime may be approximated in terms of a continuous manifold,
but where the standard Friedmann equations of classical Einstein gravity
receive non-perturbative quantum corrections. An approximate, analytical
approach to stud... | [
{
"created": "Fri, 26 Nov 2004 12:51:22 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Lidsey",
"James E.",
""
]
] | Within the framework of loop quantum cosmology, there exists a semi-classical regime where spacetime may be approximated in terms of a continuous manifold, but where the standard Friedmann equations of classical Einstein gravity receive non-perturbative quantum corrections. An approximate, analytical approach to studyi... |
2209.07152 | Yong-Wan Kim | Soon-Tae Hong, Yong-Wan Kim, Young-Jai Park | GEMS embeddings of Hayward regular black holes in massless and massive
gravities | 22 pages, 7 figures | Universe 2023, 9(11), 486 | 10.3390/universe9110486 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After finding a solution for the Hayward regular black hole (HRBH) in massive
gravity, we embed the (3+1)-dimensional HRBHs both in massless and in massive
gravities into (5+2)- and (6+3)-dimensional Minkowski spacetimes, respectively.
Here, massive gravity denotes that a graviton acquires a mass holographically
by b... | [
{
"created": "Thu, 15 Sep 2022 09:08:49 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Nov 2023 15:04:58 GMT",
"version": "v2"
}
] | 2023-11-22 | [
[
"Hong",
"Soon-Tae",
""
],
[
"Kim",
"Yong-Wan",
""
],
[
"Park",
"Young-Jai",
""
]
] | After finding a solution for the Hayward regular black hole (HRBH) in massive gravity, we embed the (3+1)-dimensional HRBHs both in massless and in massive gravities into (5+2)- and (6+3)-dimensional Minkowski spacetimes, respectively. Here, massive gravity denotes that a graviton acquires a mass holographically by bro... |
1307.5360 | Sergei Kopeikin | Sergei Kopeikin (University of Missouri, USA) | Equivalence Principle in Cosmology | 4 pages, no figures. Presented at the Sixth Meeting on CPT and
Lorentz Symmetry, Bloomington, Indiana, June 17-21, 2013 | null | 10.1142/9789814566438_0056 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the Einstein equivalence principle (EEP) for a Hubble observer in
Friedmann-Lemaitre-Robertson-Walker spacetime. We show that the affine
structure of light cone in the FLRW spacetime should be treated locally in
terms of the optical metric which is not reduced to the Minkowski metric due to
the non-uniform... | [
{
"created": "Sat, 20 Jul 2013 01:34:33 GMT",
"version": "v1"
}
] | 2014-02-05 | [
[
"Kopeikin",
"Sergei",
"",
"University of Missouri, USA"
]
] | We analyse the Einstein equivalence principle (EEP) for a Hubble observer in Friedmann-Lemaitre-Robertson-Walker spacetime. We show that the affine structure of light cone in the FLRW spacetime should be treated locally in terms of the optical metric which is not reduced to the Minkowski metric due to the non-uniform p... |
1007.3563 | Misao Sasaki | Nathalie Deruelle and Misao Sasaki | Conformal equivalence in classical gravity: the example of "veiled"
General Relativity | 10 pages, no figure, to appear in the Proceedings: Cosmology, Quantum
Vacuum and Zeta Functions, 8-10 March, 2010 | null | 10.1007/978-3-642-19760-4_23 | YITP-10-61 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the theory of General Relativity, gravity is described by a metric which
couples minimally to the fields representing matter. We consider here its
"veiled" versions where the metric is conformally related to the original one
and hence is no longer minimally coupled to the matter variables. We show on
simple exampl... | [
{
"created": "Wed, 21 Jul 2010 05:36:15 GMT",
"version": "v1"
}
] | 2015-05-19 | [
[
"Deruelle",
"Nathalie",
""
],
[
"Sasaki",
"Misao",
""
]
] | In the theory of General Relativity, gravity is described by a metric which couples minimally to the fields representing matter. We consider here its "veiled" versions where the metric is conformally related to the original one and hence is no longer minimally coupled to the matter variables. We show on simple examples... |
gr-qc/9912039 | Michael O. Katanaev | M.O.Katanaev (Steklov Math. Inst.) | Global solutions in gravity | 4 pages, 2 figures, minor changes | Nucl.Phys.Proc.Suppl. 88 (2000) 233-236 | 10.1016/S0920-5632(00)00774-X | null | gr-qc | null | The method of conformal blocks for construction of global solutions in
gravity for a two-dimensional metric having one Killing vector field is
described.
| [
{
"created": "Fri, 10 Dec 1999 12:11:50 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jan 2000 19:16:54 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Katanaev",
"M. O.",
"",
"Steklov Math. Inst."
]
] | The method of conformal blocks for construction of global solutions in gravity for a two-dimensional metric having one Killing vector field is described. |
1103.0343 | Yun Soo Myung | Yun Soo Myung, Taeyoon Moon, Edwin J. Son | Stability of f(R) black holes | 16 pages, no figures, version to appear in Physical Review D | Phys.Rev.D83:124009,2011 | 10.1103/PhysRevD.83.124009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the stability of $f(R)$ (Schwarzschild) black hole obtained
from the $f(R)$ gravity. It is difficult to carry out the perturbation analysis
around the black hole because the linearized Einstein equation is fourth order
in $f(R)$ gravity. In order to resolve this difficulty, we transform $f(R)$
gravity ... | [
{
"created": "Wed, 2 Mar 2011 03:57:02 GMT",
"version": "v1"
},
{
"created": "Wed, 18 May 2011 23:06:15 GMT",
"version": "v2"
}
] | 2011-06-13 | [
[
"Myung",
"Yun Soo",
""
],
[
"Moon",
"Taeyoon",
""
],
[
"Son",
"Edwin J.",
""
]
] | We investigate the stability of $f(R)$ (Schwarzschild) black hole obtained from the $f(R)$ gravity. It is difficult to carry out the perturbation analysis around the black hole because the linearized Einstein equation is fourth order in $f(R)$ gravity. In order to resolve this difficulty, we transform $f(R)$ gravity in... |
1805.07814 | Yvonne Cal\`o | Yvonne Cal\`o | Relation between Symmetry Groups for Asymptotically Flat Spacetimes | null | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this dissertation is to examine the BMS symmetry group, which
arises as the asymptotic symmetry group of four-dimensional asymptotically flat
spacetimes at null infinity, and to uncover its relation to the Carroll group.
Firstly, we illustrate how the BMS group emerges from the analysis of the
asymptot... | [
{
"created": "Sun, 20 May 2018 19:31:08 GMT",
"version": "v1"
},
{
"created": "Fri, 25 May 2018 10:03:18 GMT",
"version": "v2"
}
] | 2018-05-28 | [
[
"Calò",
"Yvonne",
""
]
] | The purpose of this dissertation is to examine the BMS symmetry group, which arises as the asymptotic symmetry group of four-dimensional asymptotically flat spacetimes at null infinity, and to uncover its relation to the Carroll group. Firstly, we illustrate how the BMS group emerges from the analysis of the asymptotic... |
1607.04226 | Richard Price | Richard H Price and Gaurav Khanna | Arrival Times of Gravitational Radiation Peaks for Binary Inspiral | 12 pages, 10 figures; revised version: figures clarified, typos
corrected | Phys. Rev. D 94, 104026 (2016) | 10.1103/PhysRevD.94.104026 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modeling of gravitational waves (GWs) from binary black hole inspiral brings
together early post-Newtonian waveforms and late quasinormal ringing waveforms.
Attempts to bridge the two limits without recourse to numerical relativity
involve predicting the time of the peak GW amplitude. This prediction will
require sol... | [
{
"created": "Thu, 14 Jul 2016 17:52:53 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Sep 2016 02:41:46 GMT",
"version": "v2"
}
] | 2016-11-15 | [
[
"Price",
"Richard H",
""
],
[
"Khanna",
"Gaurav",
""
]
] | Modeling of gravitational waves (GWs) from binary black hole inspiral brings together early post-Newtonian waveforms and late quasinormal ringing waveforms. Attempts to bridge the two limits without recourse to numerical relativity involve predicting the time of the peak GW amplitude. This prediction will require solvi... |
gr-qc/0305011 | Alberto Saa | L. Brenig, A. Figueiredo, E. Gunzig, T.M. Rocha Filho, and Alberto Saa | Stability properties and asymptotics for N non-minimally coupled scalar
fields cosmology | 10 pages | Int.J.Theor.Phys. 42 (2003) 1153-1161 | null | null | gr-qc | null | We consider here the dynamics of some homogeneous and isotropic cosmological
models with $N$ interacting classical scalar fields non-minimally coupled to
the spacetime curvature, as an attempt to generalize some recent results
obtained for one and two scalar fields. We show that a Lyapunov function can be
constructed... | [
{
"created": "Fri, 2 May 2003 17:11:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Brenig",
"L.",
""
],
[
"Figueiredo",
"A.",
""
],
[
"Gunzig",
"E.",
""
],
[
"Filho",
"T. M. Rocha",
""
],
[
"Saa",
"Alberto",
""
]
] | We consider here the dynamics of some homogeneous and isotropic cosmological models with $N$ interacting classical scalar fields non-minimally coupled to the spacetime curvature, as an attempt to generalize some recent results obtained for one and two scalar fields. We show that a Lyapunov function can be constructed u... |
1210.1155 | \"Ozg\"ur Akarsu | Ozgur Akarsu, Tekin Dereli | The Dynamical Evolution of 3-Space in a Higher Dimensional Steady State
Universe | 21 pages, 12 figures, 1 table; the version accepted for publication
in General Relativity and Gravitation | null | 10.1007/s10714-013-1505-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a class of cosmological solutions of Einstein's field
equations in higher dimensions with a cosmological constant and an ideal fluid
matter distribution as a source. We discuss the dynamical evolution of the
universe subject to two constraints that (i) the total volume scale factor of
the universe is c... | [
{
"created": "Wed, 3 Oct 2012 15:50:11 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Feb 2013 10:10:19 GMT",
"version": "v2"
}
] | 2013-02-15 | [
[
"Akarsu",
"Ozgur",
""
],
[
"Dereli",
"Tekin",
""
]
] | We investigate a class of cosmological solutions of Einstein's field equations in higher dimensions with a cosmological constant and an ideal fluid matter distribution as a source. We discuss the dynamical evolution of the universe subject to two constraints that (i) the total volume scale factor of the universe is con... |
gr-qc/9703073 | Milan Mijic | Milan Mijic | Vacuum Fluctuations as a Source of Adiabatic Perturbations in Power Law
Inflationary Cosmology | 6 pages, Latex. Accepted for Mod Phys Lett A | Mod.Phys.Lett. A12 (1997) 647-652 | 10.1142/S0217732397000674 | null | gr-qc | null | An analysis of the decoherence of quantum fluctuations shows that production
of classical adiabatic density perturbations may not take place in models of
power-law inflation with power 1< p < 3. Some consequences for models of
extended inflation are pointed out. In general, the condition for decoherence
places new co... | [
{
"created": "Tue, 25 Mar 1997 19:33:00 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Mijic",
"Milan",
""
]
] | An analysis of the decoherence of quantum fluctuations shows that production of classical adiabatic density perturbations may not take place in models of power-law inflation with power 1< p < 3. Some consequences for models of extended inflation are pointed out. In general, the condition for decoherence places new cons... |
2008.12701 | German Izquierdo | German Izquierdo, Gildardo Alonzo, and Jaime Besprosvany | Primordial gravitational waves spectrum in the interacting Bose-Einstein
gas model | 16 pages, 4 figures | null | 10.1007/s10714-021-02891-3 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evolution and power spectrum of primordial gravitational waves
in the interactive Bose-Einstein gas model for dark energy, relevant, as it
addresses the coincidence problem. The model is applied in the radiation,
matter and dark-energy domination stages. The model introduces a scale factor
associated to ... | [
{
"created": "Fri, 28 Aug 2020 15:19:04 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Feb 2022 18:39:22 GMT",
"version": "v2"
}
] | 2022-02-16 | [
[
"Izquierdo",
"German",
""
],
[
"Alonzo",
"Gildardo",
""
],
[
"Besprosvany",
"Jaime",
""
]
] | We study the evolution and power spectrum of primordial gravitational waves in the interactive Bose-Einstein gas model for dark energy, relevant, as it addresses the coincidence problem. The model is applied in the radiation, matter and dark-energy domination stages. The model introduces a scale factor associated to th... |
1310.4494 | Ahmadjon Abdujabbarov | Ahmadjon Abdujabbarov, Naresh Dadhich, Bobomurat Ahmedov, Husan
Eshkuvatov | Particle Acceleration Around 5-dimensional Kerr Black Hole | 7 pages, 7 figures | Phys. Rev. D 88, 084036 (2013) | 10.1103/PhysRevD.88.084036 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | On the lines of the 4-dimensional Kerr black hole we consider the particle
acceleration near a 5-dimensional Kerr black hole which has the two rotation
parameters. It turns out that the center of mass energy of the two equal mass
colliding particles as expected diverges for the extremal black hole and there
is a symm... | [
{
"created": "Wed, 16 Oct 2013 10:18:46 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Oct 2013 16:50:35 GMT",
"version": "v2"
},
{
"created": "Wed, 11 Dec 2013 14:39:09 GMT",
"version": "v3"
}
] | 2013-12-12 | [
[
"Abdujabbarov",
"Ahmadjon",
""
],
[
"Dadhich",
"Naresh",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Eshkuvatov",
"Husan",
""
]
] | On the lines of the 4-dimensional Kerr black hole we consider the particle acceleration near a 5-dimensional Kerr black hole which has the two rotation parameters. It turns out that the center of mass energy of the two equal mass colliding particles as expected diverges for the extremal black hole and there is a symmet... |
gr-qc/0611011 | Alexander Alekseenko | Alexander M. Alekseenko | Well-Posed Initial-Boundary Value Problem for a Constrained Evolution
System and Radiation-Controlling Constraint-Preserving Boundary Conditions | To appear in the Journal of Hyperbolic Differential Equations. In
response to the reviewers request, a theorem on well-posedness of the free
evolution problem has been added, definitions clarified in Sections 4 and 5,
as well as a typo was removed from Section 6 | null | null | null | gr-qc | null | A well-posed initial-boundary value problem is formulated for the model
problem of the vector wave equation subject to the divergence-free constraint.
Existence, uniqueness and stability of the solution is proved by reduction to a
system evolving the constraint quantity statically, i.e., the second time
derivative of... | [
{
"created": "Thu, 2 Nov 2006 20:35:40 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Nov 2006 21:08:08 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Aug 2007 00:33:48 GMT",
"version": "v3"
}
] | 2007-08-23 | [
[
"Alekseenko",
"Alexander M.",
""
]
] | A well-posed initial-boundary value problem is formulated for the model problem of the vector wave equation subject to the divergence-free constraint. Existence, uniqueness and stability of the solution is proved by reduction to a system evolving the constraint quantity statically, i.e., the second time derivative of t... |
1804.06408 | Xiao-Kan Guo | Xiao-Kan Guo, Qing-yu Cai | Hidden Messenger from Quantum Geometry: Towards Information Conservation
in Quantum Gravity | 13 pages | Modern Physics Letters A, Vol. 33, No. 18 (2018) 1850103 | 10.1142/S0217732318501031 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The back reactions of Hawking radiation allow nontrivial correlations between
consecutive Hawking quanta, which gives a possible way of resolving the paradox
of black hole information loss known as the hidden messenger method. In a
recent work of Ma {\it et al} [arXiv:1711.10704], this method is enhanced by a
general... | [
{
"created": "Tue, 17 Apr 2018 15:50:56 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Jun 2018 13:54:32 GMT",
"version": "v2"
}
] | 2018-06-11 | [
[
"Guo",
"Xiao-Kan",
""
],
[
"Cai",
"Qing-yu",
""
]
] | The back reactions of Hawking radiation allow nontrivial correlations between consecutive Hawking quanta, which gives a possible way of resolving the paradox of black hole information loss known as the hidden messenger method. In a recent work of Ma {\it et al} [arXiv:1711.10704], this method is enhanced by a general d... |
gr-qc/0001059 | null | Miroslav Sukenik, Jozef Sima and Julius Vanko | Unification of Weak and Gravitational Interactions Stemming from
Expansive Nondecelerative Universe Model | 5 pages, AmsTex | null | null | SSV-00-01 | gr-qc | null | There is a deep interrelationship of the General Theory of Relativity and
weak interactions in the model of Expansive Nondecelerative Universe. This fact
allows an independent determination of the mass of vector bosons Z and W, as
well as the time of separation of electromagnetic and weak interactions.
| [
{
"created": "Thu, 20 Jan 2000 12:16:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sukenik",
"Miroslav",
""
],
[
"Sima",
"Jozef",
""
],
[
"Vanko",
"Julius",
""
]
] | There is a deep interrelationship of the General Theory of Relativity and weak interactions in the model of Expansive Nondecelerative Universe. This fact allows an independent determination of the mass of vector bosons Z and W, as well as the time of separation of electromagnetic and weak interactions. |
2209.14873 | Bayram Tekin | Aydin Tavlayan and Bayram Tekin | Light Rings around Five Dimensional Stationary Black Holes and Naked
Singularities | 11 pages, 7 figures, v2 matches the published version | Phys. Rev. D 107, 024016 (2023) | 10.1103/PhysRevD.107.024016 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of light rings in a spacetime is closely related to the
existence of black hole horizons and observables such as the ringdown and the
shadow. Black holes, compared to nonvacuum ultracompact objects, have rather
unique environments. To this aim, recently [P.V.P. Cunha and C.A.R. Herdeiro,
Phys. Rev. Lett... | [
{
"created": "Thu, 29 Sep 2022 15:39:26 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Jan 2023 09:41:51 GMT",
"version": "v2"
}
] | 2023-01-20 | [
[
"Tavlayan",
"Aydin",
""
],
[
"Tekin",
"Bayram",
""
]
] | The existence of light rings in a spacetime is closely related to the existence of black hole horizons and observables such as the ringdown and the shadow. Black holes, compared to nonvacuum ultracompact objects, have rather unique environments. To this aim, recently [P.V.P. Cunha and C.A.R. Herdeiro, Phys. Rev. Lett. ... |
gr-qc/0112058 | null | Bahram Mashhoon | Gravitation and Nonlocality | LaTeX file, no figures, 12 pages. To be published in: Proc. 25th
Johns Hopkins Workshop "2001: A Relativistic Spacetime Odyssey" (World
Scientific, Singapore) | null | null | null | gr-qc | null | The physical basis of the standard theory of general relativity is examined
and a nonlocal theory of accelerated observers is described that involves a
natural generalization of the hypothesis of locality. The nonlocal theory is
confronted with experiment via an indirect approach. The implications of the
results for ... | [
{
"created": "Fri, 21 Dec 2001 22:41:03 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mashhoon",
"Bahram",
""
]
] | The physical basis of the standard theory of general relativity is examined and a nonlocal theory of accelerated observers is described that involves a natural generalization of the hypothesis of locality. The nonlocal theory is confronted with experiment via an indirect approach. The implications of the results for gr... |
1512.08259 | Jonathan Luk | Jonathan Luk and Jan Sbierski | Instability results for the wave equation in the interior of Kerr black
holes | null | null | null | null | gr-qc math-ph math.AP math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that a large class of smooth solutions $\psi$ to the linear wave
equation $\Box_g\psi=0$ on subextremal rotating Kerr spacetimes which are
regular and decaying along the event horizon become singular at the Cauchy
horizon. More precisely, we show that assuming appropriate upper and lower
bounds on the energy... | [
{
"created": "Sun, 27 Dec 2015 18:29:08 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Jun 2016 13:31:39 GMT",
"version": "v2"
}
] | 2016-07-01 | [
[
"Luk",
"Jonathan",
""
],
[
"Sbierski",
"Jan",
""
]
] | We prove that a large class of smooth solutions $\psi$ to the linear wave equation $\Box_g\psi=0$ on subextremal rotating Kerr spacetimes which are regular and decaying along the event horizon become singular at the Cauchy horizon. More precisely, we show that assuming appropriate upper and lower bounds on the energy a... |
1908.06034 | Tomas Ledvinka | Anton Khirnov, Tomas Ledvinka | Slicing conditions for axisymmetric gravitational collapse of Brill
waves | null | Class. Quantum Grav. 35 (2018) 215003 | 10.1088/1361-6382/aae1bc | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In numerical relativity, spacetimes involving compact strongly gravitating
objects are constructed as numerical solutions of Einstein's equations. Success
of such a process strongly depends on the availability of appropriate
coordinates, which are typically constructed dynamically. A very robust
coordinate choice is ... | [
{
"created": "Fri, 16 Aug 2019 15:41:00 GMT",
"version": "v1"
}
] | 2019-08-19 | [
[
"Khirnov",
"Anton",
""
],
[
"Ledvinka",
"Tomas",
""
]
] | In numerical relativity, spacetimes involving compact strongly gravitating objects are constructed as numerical solutions of Einstein's equations. Success of such a process strongly depends on the availability of appropriate coordinates, which are typically constructed dynamically. A very robust coordinate choice is a ... |
1104.1811 | Johan Noldus | Johan Noldus | A new topology on the space of Lorentzian metrics on a fixed manifold | 33 pages | Class. Quantum Grav. 19 (2002) 6075-6107 | 10.1088/0264-9381/19/23/313 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a covariant definition of closeness between (time oriented)
Lorentzian metrics on a manifold M, using a family of functions which measure
the difference in volume form on one hand and the difference in causal
structure relative to a volume scale on the other hand. These functions will
distinguish two geometri... | [
{
"created": "Sun, 10 Apr 2011 22:51:19 GMT",
"version": "v1"
}
] | 2011-04-12 | [
[
"Noldus",
"Johan",
""
]
] | We give a covariant definition of closeness between (time oriented) Lorentzian metrics on a manifold M, using a family of functions which measure the difference in volume form on one hand and the difference in causal structure relative to a volume scale on the other hand. These functions will distinguish two geometric ... |
1106.5795 | Pablo A. Rosado | Pablo A. Rosado | Gravitational wave background from binary systems | 30 pages, 16 figures | Physical Review D 84, 084004 (2011) | 10.1103/PhysRevD.84.084004 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Basic aspects of the background of gravitational waves and its mathematical
characterization are reviewed. The spectral energy density parameter
$\Omega(f)$, commonly used as a quantifier of the background, is derived for an
ensemble of many identical sources emitting at different times and locations.
For such an ens... | [
{
"created": "Tue, 28 Jun 2011 20:12:39 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Oct 2011 10:00:01 GMT",
"version": "v2"
}
] | 2011-10-05 | [
[
"Rosado",
"Pablo A.",
""
]
] | Basic aspects of the background of gravitational waves and its mathematical characterization are reviewed. The spectral energy density parameter $\Omega(f)$, commonly used as a quantifier of the background, is derived for an ensemble of many identical sources emitting at different times and locations. For such an ensem... |
2304.05807 | Mouhssine Koussour | Dan Wang, M. Koussour, Adnan Malik, N. Myrzakulov, and G. Mustafa | Observational constraints on a logarithmic scalar field dark energy
model and black hole mass evolution in the Universe | The European Physical Journal C published version | Eur. Phys. J. C 83, 670 (2023) | 10.1140/epjc/s10052-023-11744-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a logarithmic parametrization form of energy density for the
scalar field dark energy in the framework of the standard theory of gravity,
which supports the necessary transition from the decelerated to the accelerated
behavior of the Universe. The model under consideration is constrained by
available obser... | [
{
"created": "Wed, 12 Apr 2023 12:36:13 GMT",
"version": "v1"
},
{
"created": "Thu, 11 May 2023 22:52:31 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Jul 2023 08:57:22 GMT",
"version": "v3"
},
{
"created": "Fri, 28 Jul 2023 14:59:05 GMT",
"version": "v4"
}
] | 2023-07-31 | [
[
"Wang",
"Dan",
""
],
[
"Koussour",
"M.",
""
],
[
"Malik",
"Adnan",
""
],
[
"Myrzakulov",
"N.",
""
],
[
"Mustafa",
"G.",
""
]
] | We propose a logarithmic parametrization form of energy density for the scalar field dark energy in the framework of the standard theory of gravity, which supports the necessary transition from the decelerated to the accelerated behavior of the Universe. The model under consideration is constrained by available observa... |
gr-qc/9405022 | U. Bleyer | U. Bleyer, A. Zhuk | On Spontaneous Compactification in Multidimensional Cosmology | 21 pages, LaTeX, Potsdam University, preprint AIP 94-04 | null | null | null | gr-qc | null | Mutidimensional cosmological models with $n\left( n\geq 2\right) $ Einstein
spaces $M_i\left( i=1,\ldots ,n\right) $ are investigated. The cosmological
constant and homogeneous minimally coupled scalar field as a matter sources are
considered. The scalar field has a potential of general form depending on the
scalar f... | [
{
"created": "Mon, 9 May 1994 14:07:48 GMT",
"version": "v1"
},
{
"created": "Fri, 13 May 1994 09:42:47 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Bleyer",
"U.",
""
],
[
"Zhuk",
"A.",
""
]
] | Mutidimensional cosmological models with $n\left( n\geq 2\right) $ Einstein spaces $M_i\left( i=1,\ldots ,n\right) $ are investigated. The cosmological constant and homogeneous minimally coupled scalar field as a matter sources are considered. The scalar field has a potential of general form depending on the scalar fie... |
2304.10692 | Matt Visser | Rudeep Gaur (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | Black holes, white holes, and near-horizon physics | V1: 22 pages; V2: now 23 pages, 5 references added, no change in
physics conclusions. V3: now 24 pages; some clarifications and discussion
added; typos fixed; no physics changes. Published version | JHEP 2024 # 05 (2024) 172 | 10.1007/JHEP05(2024)172 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black and white holes play remarkably contrasting roles in general relativity
versus observational astrophysics. While there is overwhelming observational
evidence for the existence of compact objects that are "cold, dark, and heavy",
which thereby are natural candidates for black holes, the theoretically viable
time... | [
{
"created": "Fri, 21 Apr 2023 01:25:46 GMT",
"version": "v1"
},
{
"created": "Mon, 1 May 2023 07:53:55 GMT",
"version": "v2"
},
{
"created": "Thu, 16 May 2024 20:28:30 GMT",
"version": "v3"
}
] | 2024-05-20 | [
[
"Gaur",
"Rudeep",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | Black and white holes play remarkably contrasting roles in general relativity versus observational astrophysics. While there is overwhelming observational evidence for the existence of compact objects that are "cold, dark, and heavy", which thereby are natural candidates for black holes, the theoretically viable time-r... |
1306.6747 | Yoichi Aso | Yoichi Aso, Yuta Michimura, Kentaro Somiya, Masaki Ando, Osamu
Miyakawa, Takanori Sekiguchi, Daisuke Tatsumi and Hiroaki Yamamoto | Interferometer design of the KAGRA gravitational wave detector | 16 pages, 18 figures, 8 tables | null | 10.1103/PhysRevD.88.043007 | null | gr-qc physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | KAGRA is a cryogenic interferometric gravitational wave detector being
constructed at the underground site of Kamioka mine in Gifu prefecture, Japan.
We performed an optimization of the interferomter design, to achieve the best
sensitivity and a stable operation, with boundary conditions of classical
noises and under... | [
{
"created": "Fri, 28 Jun 2013 08:13:16 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Aso",
"Yoichi",
""
],
[
"Michimura",
"Yuta",
""
],
[
"Somiya",
"Kentaro",
""
],
[
"Ando",
"Masaki",
""
],
[
"Miyakawa",
"Osamu",
""
],
[
"Sekiguchi",
"Takanori",
""
],
[
"Tatsumi",
"Daisuke",
""
],
[
... | KAGRA is a cryogenic interferometric gravitational wave detector being constructed at the underground site of Kamioka mine in Gifu prefecture, Japan. We performed an optimization of the interferomter design, to achieve the best sensitivity and a stable operation, with boundary conditions of classical noises and under v... |
gr-qc/0110123 | Mauricio Bellini | Mauricio Bellini (IFM, Michoacana University) | Thermodynamical properties of metric fluctuations during inflation | 7 pages, no figures (accepted to publication in General Relativity
and Gravitation) | Gen.Rel.Grav. 34 (2002) 1483-1489 | 10.1023/A:1020728004921 | null | gr-qc | null | I study a thermodynamical approach to scalar metric perturbations during the
inflationary stage. In the power-law expanding universe here studied, I find a
negative heat capacity as a manifestation of superexponential growing for the
number of states in super Hubble scales. The power spectrum depends on the
Gibbons-H... | [
{
"created": "Tue, 30 Oct 2001 23:21:43 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Feb 2002 23:51:52 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Bellini",
"Mauricio",
"",
"IFM, Michoacana University"
]
] | I study a thermodynamical approach to scalar metric perturbations during the inflationary stage. In the power-law expanding universe here studied, I find a negative heat capacity as a manifestation of superexponential growing for the number of states in super Hubble scales. The power spectrum depends on the Gibbons-Haw... |
2102.00915 | Pardyumn Kumar Sahoo | Zinnat Hassan, Sanjay Mandal, P.K. Sahoo | Traversable wormhole geometries in $f(Q)$ gravity | Revised version submitted to Progress of Physics | Fortschritte der Physik, 69(6), 2100023 (2021) | 10.1002/prop.202100023 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The current interests in the universe motivate us to go beyond Einstein's
General theory of relativity. One of the interesting proposals comes from a new
class of teleparallel gravity named symmetric teleparallel gravity, i.e.,
$f(Q)$ gravity, where the non-metricity term $Q$ is accountable for fundamental
interactio... | [
{
"created": "Fri, 29 Jan 2021 05:04:56 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Mar 2021 10:03:24 GMT",
"version": "v2"
},
{
"created": "Thu, 22 Apr 2021 12:06:22 GMT",
"version": "v3"
}
] | 2021-06-09 | [
[
"Hassan",
"Zinnat",
""
],
[
"Mandal",
"Sanjay",
""
],
[
"Sahoo",
"P. K.",
""
]
] | The current interests in the universe motivate us to go beyond Einstein's General theory of relativity. One of the interesting proposals comes from a new class of teleparallel gravity named symmetric teleparallel gravity, i.e., $f(Q)$ gravity, where the non-metricity term $Q$ is accountable for fundamental interaction.... |
gr-qc/0002072 | George Emanuel Avraam Matsas | J. Castineiras and George E.A. Matsas | Low-energy sector quantization of a massless scalar field outside a
Reissner-Nordstrom black hole and static sources | 12 pages (REVTEX), no figures | Phys.Rev. D62 (2000) 064001 | 10.1103/PhysRevD.62.064001 | IFT-P020/2000 | gr-qc | null | We quantize the low-energy sector of a massless scalar field in the
Reissner-Nordstrom spacetime. This allows the analysis of processes involving
soft scalar particles occurring outside charged black holes. In particular, we
compute the response of a static scalar source interacting with Hawking
radiation using the U... | [
{
"created": "Tue, 22 Feb 2000 12:08:52 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Castineiras",
"J.",
""
],
[
"Matsas",
"George E. A.",
""
]
] | We quantize the low-energy sector of a massless scalar field in the Reissner-Nordstrom spacetime. This allows the analysis of processes involving soft scalar particles occurring outside charged black holes. In particular, we compute the response of a static scalar source interacting with Hawking radiation using the Unr... |
1805.00186 | Hiroaki Tahara | Hiroaki W. H. Tahara, Sakine Nishi, Tsutomu Kobayashi, and Jun'ichi
Yokoyama | Self-anisotropizing inflationary universe in Horndeski theory and beyond | 13 pages, 2 figures | JCAP07(2018)058 | 10.1088/1475-7516/2018/07/058 | RESCEU-6/18, RUP-18-14 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As opposed to Wald's cosmic no-hair theorem in general relativity, it is
shown that the Horndeski theory (and its generalization) admits anisotropic
inflationary attractors if the Lagrangian depends cubically on the second
derivatives of the scalar field. We dub such a solution as a
self-anisotropizing inflationary u... | [
{
"created": "Tue, 1 May 2018 04:56:13 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Jul 2018 12:37:32 GMT",
"version": "v2"
}
] | 2018-08-01 | [
[
"Tahara",
"Hiroaki W. H.",
""
],
[
"Nishi",
"Sakine",
""
],
[
"Kobayashi",
"Tsutomu",
""
],
[
"Yokoyama",
"Jun'ichi",
""
]
] | As opposed to Wald's cosmic no-hair theorem in general relativity, it is shown that the Horndeski theory (and its generalization) admits anisotropic inflationary attractors if the Lagrangian depends cubically on the second derivatives of the scalar field. We dub such a solution as a self-anisotropizing inflationary uni... |
gr-qc/9609021 | Cadoni Mariano | S. Monni and M. Cadoni | The 2D analogue of the Reissner-Nordstrom solution | 5 pages, Plain-Tex, no figures | Class.Quant.Grav. 14 (1997) 517-521 | 10.1088/0264-9381/14/2/024 | INFNCA-TH9618 | gr-qc hep-th | null | A two-dimensional (2D) dilaton gravity model, whose static solutions have the
same features of the Reissner-Nordstrom solutions, is obtained from the
dimensional reduction of a four-dimensional (4D) string effective action
invariant under S-duality transformations. The black hole solutions of the 2D
model and their r... | [
{
"created": "Mon, 9 Sep 1996 10:13:46 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Monni",
"S.",
""
],
[
"Cadoni",
"M.",
""
]
] | A two-dimensional (2D) dilaton gravity model, whose static solutions have the same features of the Reissner-Nordstrom solutions, is obtained from the dimensional reduction of a four-dimensional (4D) string effective action invariant under S-duality transformations. The black hole solutions of the 2D model and their rel... |
1603.07480 | Mikhail Iofa | Mikhail Z. Iofa | Density matrix of radiation of black hole with fluctuating horizon | 12 pages, 1 fig, Sect.2 changed, misprints corrected | Phys. Rev. D 94, 064044 (2016) | 10.1103/PhysRevD.94.064044 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The density matrix of Hawking radiation is calculated in the model of black
hole with fluctuating horizon. Quantum fluctuations smear the classical horizon
of black hole and modify the density matrix of radiation producing the
off-diagonal elements. The off-diagonal elements may store information of
correlations betw... | [
{
"created": "Thu, 24 Mar 2016 08:54:56 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Mar 2016 08:59:19 GMT",
"version": "v2"
},
{
"created": "Fri, 29 Apr 2016 11:54:01 GMT",
"version": "v3"
}
] | 2019-04-02 | [
[
"Iofa",
"Mikhail Z.",
""
]
] | The density matrix of Hawking radiation is calculated in the model of black hole with fluctuating horizon. Quantum fluctuations smear the classical horizon of black hole and modify the density matrix of radiation producing the off-diagonal elements. The off-diagonal elements may store information of correlations betwee... |
gr-qc/0004019 | Alan Barnes | Alan Barnes (Aston University) | A comment on a paper by Carot et al | 6 pages, TeX | Class.Quant.Grav. 17 (2000) 2605 | 10.1088/0264-9381/17/13/401 | null | gr-qc | null | In a recent paper Carot et al. considered carefully the definition of
cylindrical symmetry as a specialisation of the case of axial symmetry. One of
their propositions states that if there is a second Killing vector, which
together with the one generating the axial symmetry, forms the basis of a
two-dimensional Lie a... | [
{
"created": "Thu, 6 Apr 2000 15:06:57 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Barnes",
"Alan",
"",
"Aston University"
]
] | In a recent paper Carot et al. considered carefully the definition of cylindrical symmetry as a specialisation of the case of axial symmetry. One of their propositions states that if there is a second Killing vector, which together with the one generating the axial symmetry, forms the basis of a two-dimensional Lie alg... |
gr-qc/9510022 | Domenico Giulini | Domenico Giulini | The Group of Large Diffeomorphisms in General Relativity | 13 Pages, Plain-TeX, no figures | Banach Center Publ. 39 (1997) 303-315 | null | Freiburg THEP-95/19 | gr-qc | null | We investigate the group of large diffeomorphisms fixing a frame at a point
for general closed 3-manifolds. We derive some general structural properties of
these groups which relate to the picture of the manifold as being composed of
extended `objects' (geons).
| [
{
"created": "Wed, 11 Oct 1995 20:20:58 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Giulini",
"Domenico",
""
]
] | We investigate the group of large diffeomorphisms fixing a frame at a point for general closed 3-manifolds. We derive some general structural properties of these groups which relate to the picture of the manifold as being composed of extended `objects' (geons). |
gr-qc/0507103 | Boris Frolov Nikolaevich | Boris N. Frolov | On foundations of Poincar\'{e}-gauged theory of gravity | LaTex, 5 pages, no figures, gc.sty is used | Grav.Cosmol. 10 (2004) 116-120 | null | null | gr-qc hep-th | null | Foundations of the Poincar\'{e}-gauge theory of gravity are developed. It is
shown that the Poincar\'{e}-gauge field consists of two components: the
translational gauge field ($t$-field), which is generated by the
energy-momentum current of external fields, and the rotational gauge field
($r$-field), which is generat... | [
{
"created": "Mon, 25 Jul 2005 10:06:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Frolov",
"Boris N.",
""
]
] | Foundations of the Poincar\'{e}-gauge theory of gravity are developed. It is shown that the Poincar\'{e}-gauge field consists of two components: the translational gauge field ($t$-field), which is generated by the energy-momentum current of external fields, and the rotational gauge field ($r$-field), which is generated... |
1509.05116 | Olivier Sarbach | Eliana Chaverra and Olivier Sarbach | Quasi-normal acoustic oscillations in the transonic Bondi flow | 18 pages, 3 figures | null | 10.1007/s10714-015-2007-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent work, we analyzed the dynamics of spherical and nonspherical
acoustic perturbations of the Michel flow, describing the steady radial
accretion of a relativistic perfect fluid into a nonrotating black hole. We
showed that such perturbations undergo quasi-normal oscillations and computed
the corresponding com... | [
{
"created": "Thu, 17 Sep 2015 03:47:51 GMT",
"version": "v1"
}
] | 2016-01-20 | [
[
"Chaverra",
"Eliana",
""
],
[
"Sarbach",
"Olivier",
""
]
] | In recent work, we analyzed the dynamics of spherical and nonspherical acoustic perturbations of the Michel flow, describing the steady radial accretion of a relativistic perfect fluid into a nonrotating black hole. We showed that such perturbations undergo quasi-normal oscillations and computed the corresponding compl... |
0911.0131 | Lap-Ming Lin | H. K. Lau, P. T. Leung, L. M. Lin | Inferring physical parameters of compact stars from their f-mode
gravitational wave signals | Version accepted for publication in ApJ | Astrophys.J.714:1234-1238,2010 | 10.1088/0004-637X/714/2/1234 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose here a robust scheme to infer the physical parameters of compact
stars from their f-mode gravitational wave signals. We first show that the
frequency and the damping rate of f-mode oscillation of compact stars can be
expressed in terms of universal functions of stellar mass and moment of
inertia. By employ... | [
{
"created": "Sun, 1 Nov 2009 05:55:41 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Apr 2010 09:51:07 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Lau",
"H. K.",
""
],
[
"Leung",
"P. T.",
""
],
[
"Lin",
"L. M.",
""
]
] | We propose here a robust scheme to infer the physical parameters of compact stars from their f-mode gravitational wave signals. We first show that the frequency and the damping rate of f-mode oscillation of compact stars can be expressed in terms of universal functions of stellar mass and moment of inertia. By employin... |
gr-qc/9310015 | K. Maeda | K.Maeda, T.Tachizawa, T.Torii and T.Maki | Stability of Non-Abelian Black Holes | 4 Figures to be sent on request,8 pages, WU-AP/33/93 | Phys.Rev.Lett. 72 (1994) 450-453 | 10.1103/PhysRevLett.72.450 | null | gr-qc hep-th | null | Two types of self-gravitating particle solutions found in several theories
with non-Abelian fields are smoothly connected by a family of non-trivial black
holes. There exists a maximum point of the black hole entropy, where the
stability of solutions changes. This criterion is universal, and the changes in
stability ... | [
{
"created": "Fri, 8 Oct 1993 03:15:10 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Maeda",
"K.",
""
],
[
"Tachizawa",
"T.",
""
],
[
"Torii",
"T.",
""
],
[
"Maki",
"T.",
""
]
] | Two types of self-gravitating particle solutions found in several theories with non-Abelian fields are smoothly connected by a family of non-trivial black holes. There exists a maximum point of the black hole entropy, where the stability of solutions changes. This criterion is universal, and the changes in stability fo... |
1904.00506 | Daniel R Terno | Valentina Baccetti, Robert B. Mann, Daniel R. Terno | Trapped surfaces, energy conditions, and horizon avoidance in
spherically-symmetric collapse | Submitted to the Proceedings of Fifteenth Marcel Grossmann Meeting -
MG15. Superceeds arXiv/1703.09369. Updated version | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider spherically-symmetric black holes in semiclassical gravity. For a
collapsing radiating thin shell we derive a sufficient condition on the
exterior geometry that ensures that a black hole is not formed. This is also a
sufficient condition for an infalling test particle to avoid the apparent
horizon of an e... | [
{
"created": "Sun, 31 Mar 2019 23:13:31 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Jun 2019 07:25:18 GMT",
"version": "v2"
}
] | 2019-06-04 | [
[
"Baccetti",
"Valentina",
""
],
[
"Mann",
"Robert B.",
""
],
[
"Terno",
"Daniel R.",
""
]
] | We consider spherically-symmetric black holes in semiclassical gravity. For a collapsing radiating thin shell we derive a sufficient condition on the exterior geometry that ensures that a black hole is not formed. This is also a sufficient condition for an infalling test particle to avoid the apparent horizon of an exi... |
0712.3949 | Ettore Minguzzi | E. Minguzzi | Non-imprisonment conditions on spacetime | 12 pages, 2 figures. v2: improved results on totally imprisoned
curves, a figure changed, some misprints fixed | J.Math.Phys.49:062503,2008 | 10.1063/1.2937907 | null | gr-qc | null | The non-imprisonment conditions on spacetimes are studied. It is proved that
the non-partial imprisonment property implies the distinction property.
Moreover, it is proved that feeble distinction, a property which stays between
weak distinction and causality, implies non-total imprisonment. As a result the
non-impris... | [
{
"created": "Sun, 23 Dec 2007 20:29:56 GMT",
"version": "v1"
},
{
"created": "Mon, 12 May 2008 10:59:32 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Minguzzi",
"E.",
""
]
] | The non-imprisonment conditions on spacetimes are studied. It is proved that the non-partial imprisonment property implies the distinction property. Moreover, it is proved that feeble distinction, a property which stays between weak distinction and causality, implies non-total imprisonment. As a result the non-imprison... |
gr-qc/9811081 | F. Darabi | M. A. Jafarizadeh, F. Darabi, A. Rezaei-Aghdam, A. R. Rastegar | Tunneling in a Cosmological Model with Violation of Strong Energy
Condition | 11 pages, LaTeX | Mod.Phys.Lett. A13 (1998) 3213-3224 | 10.1142/S0217732398003429 | null | gr-qc hep-th | null | The tunneling rate, with exact prefactor, is calculated to first order in
\hbar for a closed FRW universe filled with perfect fluid violating the strong
energy condition. The calculations are performed by applying the
dilute-instanton approximation on the corresponding Duru-Kleinert path
integral. It is shown that a ... | [
{
"created": "Tue, 24 Nov 1998 07:40:57 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Jafarizadeh",
"M. A.",
""
],
[
"Darabi",
"F.",
""
],
[
"Rezaei-Aghdam",
"A.",
""
],
[
"Rastegar",
"A. R.",
""
]
] | The tunneling rate, with exact prefactor, is calculated to first order in \hbar for a closed FRW universe filled with perfect fluid violating the strong energy condition. The calculations are performed by applying the dilute-instanton approximation on the corresponding Duru-Kleinert path integral. It is shown that a cl... |
1010.1362 | Hongsheng Zhang | Hongsheng Zhang, Xin-Zhou Li, Hyerim Noh | Semi-Holographic Universe | 10 pages, 3 figs, comments are welcome | Phys.Lett.B694:177-180,2010 | 10.1016/j.physletb.2010.09.039 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By assuming that a dark component (dark energy) in the universe strictly
obeys the holographic principle, that is, its entropy is one fourth of the
apparent horizon, we find that the existence of the other dark component (dark
matter) is compulsory, as a compensation of dark energy, based on the first law
of thermody... | [
{
"created": "Thu, 7 Oct 2010 08:03:59 GMT",
"version": "v1"
}
] | 2010-12-09 | [
[
"Zhang",
"Hongsheng",
""
],
[
"Li",
"Xin-Zhou",
""
],
[
"Noh",
"Hyerim",
""
]
] | By assuming that a dark component (dark energy) in the universe strictly obeys the holographic principle, that is, its entropy is one fourth of the apparent horizon, we find that the existence of the other dark component (dark matter) is compulsory, as a compensation of dark energy, based on the first law of thermodyna... |
gr-qc/0412105 | T. Damour | Thibault Damour | Cosmological Singularities, Billiards and Lorentzian Kac-Moody Algebras | 23 pages, 3 figures, contribution to the Deserfest proceedings | null | null | null | gr-qc astro-ph hep-th | null | The structure of the general, inhomogeneous solution of (bosonic)
Einstein-matter systems in the vicinity of a cosmological singularity is
considered. We review the proof (based on ideas of
Belinskii-Khalatnikov-Lifshitz and technically simplified by the use of the
Arnowitt-Deser-Misner Hamiltonian formalism) that th... | [
{
"created": "Tue, 21 Dec 2004 15:44:11 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Damour",
"Thibault",
""
]
] | The structure of the general, inhomogeneous solution of (bosonic) Einstein-matter systems in the vicinity of a cosmological singularity is considered. We review the proof (based on ideas of Belinskii-Khalatnikov-Lifshitz and technically simplified by the use of the Arnowitt-Deser-Misner Hamiltonian formalism) that the ... |
2105.00441 | Mushtaq Ahmad Sial | M. Farasat Shamir, G. Mustafa, Mushtaq Ahmad | Charged Anisotropic Finch-Skea-Bardeen Spheres | Accepted for publication in Nuclear Physics B | Nuclear Physics B 967 (2021) 115418 | 10.1016/j.nuclphysb.2021.115418 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This manuscript explores the compact geometries by employing Karmarkar
condition with the charged anisotropic source of matter distribution. For this
purpose, we consider an explicit model by indulging $\mathrm{g}_{rr}$ metric
potential obeying the Karmarkar condition. Moreover, we ansatz the time metric
co-efficient... | [
{
"created": "Sun, 2 May 2021 11:06:46 GMT",
"version": "v1"
}
] | 2021-05-05 | [
[
"Shamir",
"M. Farasat",
""
],
[
"Mustafa",
"G.",
""
],
[
"Ahmad",
"Mushtaq",
""
]
] | This manuscript explores the compact geometries by employing Karmarkar condition with the charged anisotropic source of matter distribution. For this purpose, we consider an explicit model by indulging $\mathrm{g}_{rr}$ metric potential obeying the Karmarkar condition. Moreover, we ansatz the time metric co-efficient f... |
0811.0877 | M. Hossein Dehghani | M. H. Dehghani and Sh. Assyyaee | Dark Energy and Matter in 4 Dimensions From an Empty Kaluza-Klein
Spacetime | 11 pages, two figures | Phys.Lett.B676:16-20,2009 | 10.1016/j.physletb.2009.04.056 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the third order Lovelock equations without the cosmological
constant term in an empty $n(\geq 8)$-dimensional Kaluza-Klein spacetime
$\mathcal{M}^{4}\times \mathcal{K}^{n-4}$, where $\mathcal{K}^{n-4}$ is a
constant curvature space. We show that the emptiness of the higher-dimensional
spacetime imposes a ... | [
{
"created": "Thu, 6 Nov 2008 06:31:51 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Apr 2009 12:01:39 GMT",
"version": "v2"
}
] | 2010-12-09 | [
[
"Dehghani",
"M. H.",
""
],
[
"Assyyaee",
"Sh.",
""
]
] | We consider the third order Lovelock equations without the cosmological constant term in an empty $n(\geq 8)$-dimensional Kaluza-Klein spacetime $\mathcal{M}^{4}\times \mathcal{K}^{n-4}$, where $\mathcal{K}^{n-4}$ is a constant curvature space. We show that the emptiness of the higher-dimensional spacetime imposes a co... |
1811.08827 | Graham Shore | Graham M Shore | Memory, Penrose Limits and the Geometry of Gravitational Shockwaves and
Gyratons | 64 pages, 14 figures. JHEP version plus new appendix on gravitational
spin memory | null | 10.1007/JHEP12(2018)133 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The geometric description of gravitational memory for strong gravitational
waves is developed, with particular focus on shockwaves and their spinning
analogues, gyratons. Memory, which may be of position or velocity-encoded type,
characterises the residual separation of neighbouring `detector' geodesics
following the... | [
{
"created": "Wed, 21 Nov 2018 17:02:21 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Dec 2018 14:57:12 GMT",
"version": "v2"
}
] | 2019-01-30 | [
[
"Shore",
"Graham M",
""
]
] | The geometric description of gravitational memory for strong gravitational waves is developed, with particular focus on shockwaves and their spinning analogues, gyratons. Memory, which may be of position or velocity-encoded type, characterises the residual separation of neighbouring `detector' geodesics following the p... |
1804.10075 | Alessandro Tronconi | A. Y. Kamenshchik, A. Tronconi, T. Vardanyan, G. Venturi | Quantum Gravity, Time, Bounces and Matter | 14 pages, 1 figure | Phys. Rev. D 97, 123517 (2018) | 10.1103/PhysRevD.97.123517 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of Quantum Cosmology and the Wheeler-DeWitt equation we
investigate the possible effects of a non semiclassical wave-function of the
universe on the evolution of the inflationary perturbations. These are
associated with the quantum behaviour of the homogenous degrees of freedom (in
particular the radiu... | [
{
"created": "Thu, 26 Apr 2018 14:16:51 GMT",
"version": "v1"
}
] | 2018-06-20 | [
[
"Kamenshchik",
"A. Y.",
""
],
[
"Tronconi",
"A.",
""
],
[
"Vardanyan",
"T.",
""
],
[
"Venturi",
"G.",
""
]
] | In the context of Quantum Cosmology and the Wheeler-DeWitt equation we investigate the possible effects of a non semiclassical wave-function of the universe on the evolution of the inflationary perturbations. These are associated with the quantum behaviour of the homogenous degrees of freedom (in particular the radius ... |
1601.01668 | Joan Sola | Joan Sola | Running Vacuum in the Universe: current phenomenological status | 9 pages, 3 Figures, references added | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I review the excellent phenomenological status of a class of dynamical vacuum
models in which the vacuum energy density, $\rho_{\Lambda}=\rho_{\Lambda}(H)$,
as a function of the Hubble rate, evolves through its interaction with dark
matter and/or through the accompanying running of the gravitational coupling
$G$, inc... | [
{
"created": "Thu, 7 Jan 2016 20:58:08 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jan 2016 23:30:55 GMT",
"version": "v2"
}
] | 2016-01-15 | [
[
"Sola",
"Joan",
""
]
] | I review the excellent phenomenological status of a class of dynamical vacuum models in which the vacuum energy density, $\rho_{\Lambda}=\rho_{\Lambda}(H)$, as a function of the Hubble rate, evolves through its interaction with dark matter and/or through the accompanying running of the gravitational coupling $G$, inclu... |
gr-qc/9808041 | Richard Easther | Richard Easther | Chaos after Two-Field Inflation | 3 pages, 1 figure | null | null | Brown-HET-1135 | gr-qc | null | We show that two-field inflation can be followed by an era in which the field
dynamics become chaotic, and discuss the possible consequences of this for
two-field inflationary models. [PASCOS conference proceedings - a short version
of gr-qc/9711035]
| [
{
"created": "Fri, 14 Aug 1998 20:56:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Easther",
"Richard",
""
]
] | We show that two-field inflation can be followed by an era in which the field dynamics become chaotic, and discuss the possible consequences of this for two-field inflationary models. [PASCOS conference proceedings - a short version of gr-qc/9711035] |
gr-qc/9812050 | James D. E. Grant | James D.E. Grant | A Spinorial Hamiltonian Approach to Gravity | 20 pages, Latex 2e. Published version | Classical and Quantum Gravity 16, 3419--3437 (1999) | 10.1088/0264-9381/16/11/301 | null | gr-qc hep-th | null | We give a spinorial set of Hamiltonian variables for General Relativity in
any dimension greater than 2. This approach involves a study of the algebraic
properties of spinors in higher dimension, and of the elimination of
second-class constraints from the Hamiltonian theory. In four dimensions, when
restricted to the... | [
{
"created": "Tue, 15 Dec 1998 12:49:07 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jul 2000 10:38:28 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Grant",
"James D. E.",
""
]
] | We give a spinorial set of Hamiltonian variables for General Relativity in any dimension greater than 2. This approach involves a study of the algebraic properties of spinors in higher dimension, and of the elimination of second-class constraints from the Hamiltonian theory. In four dimensions, when restricted to the p... |
2308.01017 | Jing Ren | Di Wu, Pengyuan Gao, Jing Ren, Niayesh Afshordi | Model-independent search for the quasinormal modes of gravitational wave
echoes | 46 pages, 19 figures, 4 tables. Python code to reproduce figures is
available at the link http://github.com/hermione-evans/echomase; v2: typos
fixed, matches published version in PRD | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Postmerger gravitational wave echoes provide a unique opportunity to probe
the near-horizon structure of astrophysical black holes, which may be modified
due to nonperturbative quantum gravity phenomena. However, since the waveform
is subject to large theoretical uncertainties, it is necessary to develop
search metho... | [
{
"created": "Wed, 2 Aug 2023 08:57:08 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Dec 2023 04:55:49 GMT",
"version": "v2"
}
] | 2023-12-22 | [
[
"Wu",
"Di",
""
],
[
"Gao",
"Pengyuan",
""
],
[
"Ren",
"Jing",
""
],
[
"Afshordi",
"Niayesh",
""
]
] | Postmerger gravitational wave echoes provide a unique opportunity to probe the near-horizon structure of astrophysical black holes, which may be modified due to nonperturbative quantum gravity phenomena. However, since the waveform is subject to large theoretical uncertainties, it is necessary to develop search methods... |
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