id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2005.01310 | Shaoqi Hou | Shaoqi Hou, Zong-Hong Zhu | Gravitational memory effects and Bondi-Metzner-Sachs symmetries in
scalar-tensor theories | 29 pages, 2 figures. Add discussions on KK reduction, and soft
theorems. Feynman diagrams were fixed. Correct typos | JHEP 01 (2021) 083 | 10.1007/JHEP01(2021)083 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relation between gravitational memory effects and Bondi-Metzner-Sachs
symmetry of the asymptotically flat spacetimes is studied in the scalar-tensor
theory. For this purpose, the solutions to the equations of motion near the
future null infinity are obtained in the generalized Bondi-Sachs coordinates
with a suita... | [
{
"created": "Mon, 4 May 2020 08:12:28 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Aug 2020 06:54:27 GMT",
"version": "v2"
},
{
"created": "Fri, 14 Aug 2020 01:34:23 GMT",
"version": "v3"
},
{
"created": "Sun, 23 Aug 2020 07:29:54 GMT",
"version": "v4"
}
] | 2021-01-19 | [
[
"Hou",
"Shaoqi",
""
],
[
"Zhu",
"Zong-Hong",
""
]
] | The relation between gravitational memory effects and Bondi-Metzner-Sachs symmetry of the asymptotically flat spacetimes is studied in the scalar-tensor theory. For this purpose, the solutions to the equations of motion near the future null infinity are obtained in the generalized Bondi-Sachs coordinates with a suitabl... |
1803.04904 | Kirill Bronnikov | S.V. Bolokhov and K.A. Bronnikov | On cosmology in nonlinear multidimensional gravity with multiple factor
spaces | 8 pages, 2 figures | Grav. Cosmol. 24, 154-160 (2018) | 10.1134/S0202289318020044 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the scope of multidimensional Kaluza--Klein gravity with nonlinear
curvature terms and two spherical extra spaces of dimensions $m$ and $n$, we
study the properties of an effective action for the scale factors of the extra
dimensions. Dimensional reduction leads to an effective 4D multiscalar-tensor
theory. Ba... | [
{
"created": "Tue, 13 Mar 2018 15:57:11 GMT",
"version": "v1"
}
] | 2020-10-20 | [
[
"Bolokhov",
"S. V.",
""
],
[
"Bronnikov",
"K. A.",
""
]
] | Within the scope of multidimensional Kaluza--Klein gravity with nonlinear curvature terms and two spherical extra spaces of dimensions $m$ and $n$, we study the properties of an effective action for the scale factors of the extra dimensions. Dimensional reduction leads to an effective 4D multiscalar-tensor theory. Base... |
1404.6284 | Rory Smith | Priscilla Canizares, Scott E. Field, Jonathan Gair, Vivien Raymond,
Rory Smith and Manuel Tiglio | Accelerated gravitational-wave parameter estimation with reduced order
modeling | To appear in Physical Review Letters | Phys. Rev. Lett. 114, 071104 (2015) | 10.1103/PhysRevLett.114.071104 | LIGO-P1400038 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inferring the astrophysical parameters of coalescing compact binaries is a
key science goal of the upcoming advanced LIGO-Virgo gravitational-wave
detector network and, more generally, gravitational-wave astronomy. However,
current parameter estimation approaches for such scenarios can lead to
computationally intract... | [
{
"created": "Thu, 24 Apr 2014 22:37:01 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jan 2015 23:59:16 GMT",
"version": "v2"
}
] | 2015-03-05 | [
[
"Canizares",
"Priscilla",
""
],
[
"Field",
"Scott E.",
""
],
[
"Gair",
"Jonathan",
""
],
[
"Raymond",
"Vivien",
""
],
[
"Smith",
"Rory",
""
],
[
"Tiglio",
"Manuel",
""
]
] | Inferring the astrophysical parameters of coalescing compact binaries is a key science goal of the upcoming advanced LIGO-Virgo gravitational-wave detector network and, more generally, gravitational-wave astronomy. However, current parameter estimation approaches for such scenarios can lead to computationally intractab... |
0910.1627 | Guillermo A. Gonzalez | Camilo Akimushkin, Javier Ramos-Caro and Guillermo A. Gonz\'alez | Axially Symmetric Post-Newtonian Stellar Systems | 13 pages, 4 figures, to be published at Rev.Integr.Temas Mat | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a method to obtain self-consistent, axially symmetric, thin
disklike stellar models in the first post-Newtonian (1PN) approximation. The
models obtained are fully analytical and corresponds to the post-Newtonian
generalizations of classical ones. By introducing in the field equations
provided by the 1PN ... | [
{
"created": "Thu, 8 Oct 2009 22:32:39 GMT",
"version": "v1"
}
] | 2009-10-12 | [
[
"Akimushkin",
"Camilo",
""
],
[
"Ramos-Caro",
"Javier",
""
],
[
"González",
"Guillermo A.",
""
]
] | We introduce a method to obtain self-consistent, axially symmetric, thin disklike stellar models in the first post-Newtonian (1PN) approximation. The models obtained are fully analytical and corresponds to the post-Newtonian generalizations of classical ones. By introducing in the field equations provided by the 1PN ap... |
2103.02382 | Gamal G.L. Nashed | G.G.L. Nashed and Shin'ichi Nojiri | Specific neutral and charged black holes in $f(R)$ gravitational theory | LaTeX 18 pages, 16 figures, several revisions | Phys. Rev. D 104, 124054 (2021) | 10.1103/PhysRevD.104.124054 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | With the successes of $f(R)$ theory as a neutral modification of Einstein's
general relativity (GR), we continue our study in this field and attempt to
find general %natural { neutral} and charged black hole (BH) solutions. In the
previous papers \cite{Nashed:2020mnp,Nashed:2020tbp}, we applied the field
equation of ... | [
{
"created": "Wed, 3 Mar 2021 13:12:22 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Apr 2021 11:55:56 GMT",
"version": "v2"
},
{
"created": "Tue, 25 May 2021 14:32:55 GMT",
"version": "v3"
},
{
"created": "Tue, 29 Jun 2021 12:07:25 GMT",
"version": "v4"
},
{
"cr... | 2021-12-21 | [
[
"Nashed",
"G. G. L.",
""
],
[
"Nojiri",
"Shin'ichi",
""
]
] | With the successes of $f(R)$ theory as a neutral modification of Einstein's general relativity (GR), we continue our study in this field and attempt to find general %natural { neutral} and charged black hole (BH) solutions. In the previous papers \cite{Nashed:2020mnp,Nashed:2020tbp}, we applied the field equation of th... |
2305.10533 | Philip Lynch PhD | Philip Lynch, Maarten van de Meent, Niels Warburton | Self-forced inspirals with spin-orbit precession | 25 pages, 9 figures, published in Physical Review D | Phys. Rev. D 109, 084072 (2024) | 10.1103/PhysRevD.109.084072 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We develop the first model for extreme mass-ratio inspirals (EMRIs) with
misaligned angular momentum and primary spin, and zero eccentricity -- also
known as quasi-spherical inspirals -- evolving under the influence of the
first-order in mass ratio gravitational self-force. The forcing terms are
provided by an effici... | [
{
"created": "Wed, 17 May 2023 19:37:07 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jun 2024 08:43:29 GMT",
"version": "v2"
}
] | 2024-06-05 | [
[
"Lynch",
"Philip",
""
],
[
"van de Meent",
"Maarten",
""
],
[
"Warburton",
"Niels",
""
]
] | We develop the first model for extreme mass-ratio inspirals (EMRIs) with misaligned angular momentum and primary spin, and zero eccentricity -- also known as quasi-spherical inspirals -- evolving under the influence of the first-order in mass ratio gravitational self-force. The forcing terms are provided by an efficien... |
2203.03639 | Mouhssine Koussour | M. Koussour, S. H. Shekh, M. Govender and M. Bennai | Thermodynamical aspects of Bianchi type-I Universe in quadratic form of
$f\left( Q\right) $ gravity and observational constraints | Journal of High Energy Astrophysics accepted version | Journal of High Energy Astrophysics 37 (2023): 15-24 | 10.1016/j.jheap.2022.11.002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we discuss the Bianchi type-I cosmological model in the
framework of symmetric teleparallel gravity say $f(Q)$ gravity in which the
non-metricity term $Q$ is responsible for the gravitational interaction. We
consider a special form of the $f\left( Q\right) $ function which can be cast
as $f\left( Q\rig... | [
{
"created": "Mon, 7 Mar 2022 13:49:21 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Aug 2022 07:06:09 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Nov 2022 18:04:08 GMT",
"version": "v3"
}
] | 2023-04-05 | [
[
"Koussour",
"M.",
""
],
[
"Shekh",
"S. H.",
""
],
[
"Govender",
"M.",
""
],
[
"Bennai",
"M.",
""
]
] | In this paper, we discuss the Bianchi type-I cosmological model in the framework of symmetric teleparallel gravity say $f(Q)$ gravity in which the non-metricity term $Q$ is responsible for the gravitational interaction. We consider a special form of the $f\left( Q\right) $ function which can be cast as $f\left( Q\right... |
1211.6184 | Prayush Kumar | Duncan A. Brown, Prayush Kumar, Alexander H. Nitz | Template banks to search for low-mass binary black holes in advanced
gravitational-wave detectors | 12 pages, 10 figures | Phys. Rev. D 87, 082004 (2013) | 10.1103/PhysRevD.87.082004 | LIGO Document P1200099 | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Coalescing binary black holes (BBHs) are among the most likely sources for
the Laser Interferometer Gravitational-wave Observatory (LIGO) and its
international partners Virgo and KAGRA. Optimal searches for BBHs require
accurate waveforms for the signal model and effectual template banks that cover
the mass space of ... | [
{
"created": "Tue, 27 Nov 2012 02:34:48 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Mar 2013 21:51:19 GMT",
"version": "v2"
}
] | 2013-12-10 | [
[
"Brown",
"Duncan A.",
""
],
[
"Kumar",
"Prayush",
""
],
[
"Nitz",
"Alexander H.",
""
]
] | Coalescing binary black holes (BBHs) are among the most likely sources for the Laser Interferometer Gravitational-wave Observatory (LIGO) and its international partners Virgo and KAGRA. Optimal searches for BBHs require accurate waveforms for the signal model and effectual template banks that cover the mass space of in... |
gr-qc/0512091 | Robert Bartnik | Robert Bartnik and Jim Isenberg | Spherically symmetric dynamical horizons | latex, 19 pages, no figures | Class.Quant.Grav.23:2559-2570,2006 | 10.1088/0264-9381/23/7/020 | NI05079 | gr-qc | null | We determine sufficient and necessary conditions for a spherically symmetric
initial data set to satisfy the dynamical horizon conditions in the spacetime
development. The constraint equations reduce to a single second order linear
master equation, which leads to a systematic construction of all spherically
symmetric... | [
{
"created": "Thu, 15 Dec 2005 14:04:27 GMT",
"version": "v1"
}
] | 2011-04-21 | [
[
"Bartnik",
"Robert",
""
],
[
"Isenberg",
"Jim",
""
]
] | We determine sufficient and necessary conditions for a spherically symmetric initial data set to satisfy the dynamical horizon conditions in the spacetime development. The constraint equations reduce to a single second order linear master equation, which leads to a systematic construction of all spherically symmetric d... |
2005.09182 | Mohammad Walid AlMasri | M. W. AlMasri | Restoring Classical Energy Conditions At Microscopic Level | Revised version, 19 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | We propose a mechanism for restoring classical energy conditions at quantized
level based on quantum inequalities and quantum interest conjecture. More
concretely, we assume for each quantum state in our visible universe to have
anti-state trapped at quantum gravity scale (or true vacuum in inflation
terminology). Th... | [
{
"created": "Mon, 18 May 2020 15:23:23 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jun 2020 18:24:02 GMT",
"version": "v2"
},
{
"created": "Mon, 14 Sep 2020 16:51:22 GMT",
"version": "v3"
},
{
"created": "Sun, 6 Dec 2020 03:32:02 GMT",
"version": "v4"
},
{
"cr... | 2021-12-30 | [
[
"AlMasri",
"M. W.",
""
]
] | We propose a mechanism for restoring classical energy conditions at quantized level based on quantum inequalities and quantum interest conjecture. More concretely, we assume for each quantum state in our visible universe to have anti-state trapped at quantum gravity scale (or true vacuum in inflation terminology). The ... |
0803.3953 | Ragab Gad | M. Abdel-Megied and Ragab M. Gad | M{\o}ller's Energy in the Kantowski-Sachs Space-time | 7 pages and no figures | Adv.High Energy Phys.2010:379473,2010 | 10.1155/2010/379473 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a counter example to paper \cite{P71} and show that the result
obtained is correct for a class of metric but not general. We calculate the
total energy of the Kantowski-Sachs space-time by using the energy-momentum
definitions of M{\o}ller in the theory of general relativity and the tetrad
theory of gravit... | [
{
"created": "Thu, 27 Mar 2008 15:17:11 GMT",
"version": "v1"
}
] | 2015-02-06 | [
[
"Abdel-Megied",
"M.",
""
],
[
"Gad",
"Ragab M.",
""
]
] | We present a counter example to paper \cite{P71} and show that the result obtained is correct for a class of metric but not general. We calculate the total energy of the Kantowski-Sachs space-time by using the energy-momentum definitions of M{\o}ller in the theory of general relativity and the tetrad theory of gravity. |
1111.1125 | Maite Dupuis | Mait\'e Dupuis, Etera R. Livine | Holomorphic Simplicity Constraints for 4d Riemannian Spinfoam Models | 4 pages. Proceedings of Loops'11, Madrid. To appear in Journal of
Physics: Conference Series (JPCS) | null | 10.1088/1742-6596/360/1/012046 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from the reformulation of the classical phase space of Loop Quantum
Gravity in terms of spinor variables and spinor networks, we build coherent
spin network states and show how to use them to write the spinfoam path
integral for topological BF theory in terms of Gaussian integrals in the
spinors. Finally, we... | [
{
"created": "Fri, 4 Nov 2011 13:33:37 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Dupuis",
"Maité",
""
],
[
"Livine",
"Etera R.",
""
]
] | Starting from the reformulation of the classical phase space of Loop Quantum Gravity in terms of spinor variables and spinor networks, we build coherent spin network states and show how to use them to write the spinfoam path integral for topological BF theory in terms of Gaussian integrals in the spinors. Finally, we u... |
gr-qc/0610063 | Zsolt Horv\'ath | Zsolt Horv\'ath, Zolt\'an Kov\'acs | Canonical theory of the Kantowski-Sachs cosmological models | 6 pages, in Proceedings of the FIKUT4 Conference | Publ.Astron.Dep.Eotvos Univ., PADEU 17, 229-234 (2006) | null | null | gr-qc | null | We briefly discuss the Hamiltonian formalism of Kantowski-Sachs space-times
with vacuum, anisotropic fluid and two cross-streaming radiation field sources.
For these models a cosmological time is introduced. New constraints are found
in which the fluid momenta are separated from the rest of the variables. In
conseque... | [
{
"created": "Thu, 12 Oct 2006 11:39:55 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Horváth",
"Zsolt",
""
],
[
"Kovács",
"Zoltán",
""
]
] | We briefly discuss the Hamiltonian formalism of Kantowski-Sachs space-times with vacuum, anisotropic fluid and two cross-streaming radiation field sources. For these models a cosmological time is introduced. New constraints are found in which the fluid momenta are separated from the rest of the variables. In consequenc... |
gr-qc/9905060 | Brendan S. Guilfoyle | Brendan S. Guilfoyle | Weyl-type Fields with Geodesic Lines of Force | 13 pages, RevTex | J.Math.Phys. 40 (1999) 2032-2045 | 10.1063/1.532849 | null | gr-qc | null | The static electrogravitational equations are studied and it is shown that an
aligned type D metric which has a Weyl-type relationship between the
gravitational and electric potential has shearfree geodesic lines of force. All
such fields are then found and turn out to be the fields of a charged sphere,
charged infin... | [
{
"created": "Tue, 18 May 1999 09:55:16 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Guilfoyle",
"Brendan S.",
""
]
] | The static electrogravitational equations are studied and it is shown that an aligned type D metric which has a Weyl-type relationship between the gravitational and electric potential has shearfree geodesic lines of force. All such fields are then found and turn out to be the fields of a charged sphere, charged infinit... |
gr-qc/9904016 | Warren G. Anderson | Warren G. Anderson (University of Wisconsin - Milwaukee), Werner
Israel (University of Victoria) | Quantum Flux from a Moving Spherical Mirror | 13 pages, 2 figures, RevTex, submitted to Phys. Rev. D | Phys. Rev. D 60, 084003 (1999) | 10.1103/PhysRevD.60.084003 | WISC-MILW-99-TH-02 | gr-qc | null | We calculate the flux from a spherical mirror which is expanding or
contracting with nearly uniform acceleration. We find that the flux at an
exterior point (which could in principle be a functional of the mirror's past
history) is actually found to be a local function, depending on the first and
second time derivati... | [
{
"created": "Tue, 6 Apr 1999 16:47:22 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Apr 1999 20:10:05 GMT",
"version": "v2"
}
] | 2016-08-25 | [
[
"Anderson",
"Warren G.",
"",
"University of Wisconsin - Milwaukee"
],
[
"Israel",
"Werner",
"",
"University of Victoria"
]
] | We calculate the flux from a spherical mirror which is expanding or contracting with nearly uniform acceleration. We find that the flux at an exterior point (which could in principle be a functional of the mirror's past history) is actually found to be a local function, depending on the first and second time derivative... |
gr-qc/0012112 | David Blaschke | Danilo Behnke, David Blaschke, Victor Pervushin, Denis Proskurin | Conformal Cosmology and Supernova Data | 9 pages revtex, 1 figure, Contribution to the Proceedings of the
workshop "Quark Matter in Astro- and Particle Physics", Rostock, Nov 27 - 29,
2000, Eds: D. Blaschke, G. Burau, S.M. Schmidt | null | null | MPG-VT-UR 211/00 | gr-qc | null | We define the cosmological parameters $H_{c,0}$, $\Omega_{m,c}$ and
$\Omega_{\Lambda, c}$ within the Conformal Cosmology as obtained by the
homogeneous approximation to the conformal-invariant generalization of
Einstein's General Relativity theory. We present the definitions of the age of
the universe and of the lumi... | [
{
"created": "Fri, 29 Dec 2000 22:17:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Behnke",
"Danilo",
""
],
[
"Blaschke",
"David",
""
],
[
"Pervushin",
"Victor",
""
],
[
"Proskurin",
"Denis",
""
]
] | We define the cosmological parameters $H_{c,0}$, $\Omega_{m,c}$ and $\Omega_{\Lambda, c}$ within the Conformal Cosmology as obtained by the homogeneous approximation to the conformal-invariant generalization of Einstein's General Relativity theory. We present the definitions of the age of the universe and of the lumino... |
1103.1703 | Arianto | Arianto, F.P. Zen, S. Feranie, I P. Widyatmika, and B.E. Gunara | Kaluza-Klein brane cosmology with a bulk scalar field | 11 pages, one section added, accepted for publication in PRD | Phys.Rev.D84:044008,2011 | 10.1103/PhysRevD.84.044008 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The brane-world cosmological model in higher-dimensional spacetime with a
bulk scalar field is investigated. We derive the $(4+n)$-dimensional
gravitational field equations for the scalar field on the $(3+n)$-brane in a
$(5+n)$-dimensional bulk with Einstein gravity plus a self-interacting scalar
field. The $(4+n)$-d... | [
{
"created": "Wed, 9 Mar 2011 05:23:18 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jun 2011 03:54:42 GMT",
"version": "v2"
}
] | 2011-08-12 | [
[
"Arianto",
"",
""
],
[
"Zen",
"F. P.",
""
],
[
"Feranie",
"S.",
""
],
[
"Widyatmika",
"I P.",
""
],
[
"Gunara",
"B. E.",
""
]
] | The brane-world cosmological model in higher-dimensional spacetime with a bulk scalar field is investigated. We derive the $(4+n)$-dimensional gravitational field equations for the scalar field on the $(3+n)$-brane in a $(5+n)$-dimensional bulk with Einstein gravity plus a self-interacting scalar field. The $(4+n)$-dim... |
2302.04923 | Wei-Chen Lin | Wei-Chen Lin, Dejan Stojkovic and Dong-han Yeom | Trouble with the Penrose diagram in spacetimes connected via a spacelike
thin shell | Revised version. An Appendix has been added. 31 pages, 11 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we point out the issue of the first junction condition in
the Penrose diagram constructed by cutting and pasting analytically known
metrics with spherical symmetry by a static spacelike thin shell. We
demonstrate this issue by using two examples -- the generalized black-to-white
hole bounce with mass... | [
{
"created": "Thu, 9 Feb 2023 20:38:12 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jun 2023 08:17:46 GMT",
"version": "v2"
}
] | 2023-06-30 | [
[
"Lin",
"Wei-Chen",
""
],
[
"Stojkovic",
"Dejan",
""
],
[
"Yeom",
"Dong-han",
""
]
] | In this article, we point out the issue of the first junction condition in the Penrose diagram constructed by cutting and pasting analytically known metrics with spherical symmetry by a static spacelike thin shell. We demonstrate this issue by using two examples -- the generalized black-to-white hole bounce with mass d... |
1511.01162 | Matt Visser | Ana Alonso-Serrano (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | On burning a lump of coal | 11 pages | Physics Letters B757 (2016) 383-386 | 10.1016/j.physletb.2016.04.023 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Burning something, (e.g. the proverbial lump of coal, or an encyclopaedia for
that matter), in a blackbody furnace leads to an approximately Planck emission
spectrum with an average entropy/information transfer of approximately $3.9 \pm
2.5$ bits per emitted photon. This quantitative and qualitative result depends
on... | [
{
"created": "Tue, 3 Nov 2015 23:50:14 GMT",
"version": "v1"
}
] | 2017-11-28 | [
[
"Alonso-Serrano",
"Ana",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | Burning something, (e.g. the proverbial lump of coal, or an encyclopaedia for that matter), in a blackbody furnace leads to an approximately Planck emission spectrum with an average entropy/information transfer of approximately $3.9 \pm 2.5$ bits per emitted photon. This quantitative and qualitative result depends only... |
2312.02292 | Grigory Volovik | G.E. Volovik | Thermodynamics and decay of de Sitter vacuum | 33 pages, published in Symmetry. The short version
arXiv:2312.02292v8, "de Sitter local thermodynamics in f(R) gravity", was
published in JETP Letters DOI: 10.1134/S0021364024600526 | Symmetry 16, 763 (2024) | 10.3390/sym16060763 | null | gr-qc cond-mat.other | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the consequences of unique symmetry of de Sitter spacetime, which
is invariant under the modified translations, ${\bf r}\rightarrow {\bf r}
-e^{Ht}{\bf a}$, where $H$ is the Hubble parameter. Due to this symmetry, all
the comoving observers at any point of the de Sitter space perceive the de
Sitter environ... | [
{
"created": "Mon, 4 Dec 2023 19:13:35 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Apr 2024 14:14:36 GMT",
"version": "v10"
},
{
"created": "Mon, 15 Apr 2024 09:16:48 GMT",
"version": "v11"
},
{
"created": "Mon, 22 Apr 2024 14:14:00 GMT",
"version": "v12"
},
{
"... | 2024-06-25 | [
[
"Volovik",
"G. E.",
""
]
] | We discuss the consequences of unique symmetry of de Sitter spacetime, which is invariant under the modified translations, ${\bf r}\rightarrow {\bf r} -e^{Ht}{\bf a}$, where $H$ is the Hubble parameter. Due to this symmetry, all the comoving observers at any point of the de Sitter space perceive the de Sitter environme... |
2401.10871 | Sergey Chernov | S.V. Chernov | Shadows and photon rings of binary black holes | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper we present the images of binary black holes using the
Majumdar-Papapetrou multiblack hole solution, depending on the parameters of
the problem: the mass of black holes, the distance between them, and the
inclination of the observer. The images consists of a shadows and photon rings.
We find that a photo... | [
{
"created": "Fri, 19 Jan 2024 18:28:18 GMT",
"version": "v1"
}
] | 2024-01-22 | [
[
"Chernov",
"S. V.",
""
]
] | In this paper we present the images of binary black holes using the Majumdar-Papapetrou multiblack hole solution, depending on the parameters of the problem: the mass of black holes, the distance between them, and the inclination of the observer. The images consists of a shadows and photon rings. We find that a photon ... |
1704.01400 | Christian Nwachioma | Christian Nwachioma and Farida Tahir | Path Equations In Absolute Parallelism Space | 16 pages, 3 figures. Version 2: argument improved, typos corrected, a
diagram removed | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Riemannian and Absolute Parallelism (AP) geometries are discussed. A lavish
treatment of path equations in the AP-space using the Bazanski-type Lagrangian
is presented; We write down an expression that is absolutely conserved along a
curve in the AP-space and show that it gives the same path equations as
obtained usi... | [
{
"created": "Wed, 5 Apr 2017 13:18:57 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Apr 2017 16:44:33 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Apr 2017 03:38:21 GMT",
"version": "v3"
}
] | 2017-04-19 | [
[
"Nwachioma",
"Christian",
""
],
[
"Tahir",
"Farida",
""
]
] | Riemannian and Absolute Parallelism (AP) geometries are discussed. A lavish treatment of path equations in the AP-space using the Bazanski-type Lagrangian is presented; We write down an expression that is absolutely conserved along a curve in the AP-space and show that it gives the same path equations as obtained using... |
gr-qc/0610017 | Tim Koslowski A | Tim Koslowski | Physical Diffeomorphisms in Loop Quantum Gravity | 25 pages, 2 figures, LaTeX | null | null | null | gr-qc | null | We investigate the action of diffeomorphisms in the context of Hamiltonian
Gravity. By considering how the diffeomorphism-invariant Hilbert space of Loop
Quantum Gravity should be constructed, we formulate a physical principle by
demanding, that the gauge-invariant Hilbert space is a completion of gauge-
(i.e. diffeo... | [
{
"created": "Thu, 5 Oct 2006 10:04:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Koslowski",
"Tim",
""
]
] | We investigate the action of diffeomorphisms in the context of Hamiltonian Gravity. By considering how the diffeomorphism-invariant Hilbert space of Loop Quantum Gravity should be constructed, we formulate a physical principle by demanding, that the gauge-invariant Hilbert space is a completion of gauge- (i.e. diffeomo... |
1808.04832 | Oscar J. C. Dias | Oscar J.C. Dias, Harvey S. Reall and Jorge E. Santos | Strong cosmic censorship for charged de Sitter black holes with a
charged scalar field | 27 pages, 12 figures. v2: i) minor improvements of a few discussions;
ii) checked that, when overlap occurs, our numerical results agree with those
of arXiv:1808.03635 | null | 10.1088/1361-6382/aafcf2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown recently that the strong cosmic censorship conjecture is
violated by near-extremal Reissner-Nordstr\"om-de Sitter black holes. We
investigate whether the introduction of a charged scalar field can rescue
strong cosmic censorship. We find that such a field improves the situation but
there is always a... | [
{
"created": "Tue, 14 Aug 2018 18:02:07 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Aug 2018 18:00:34 GMT",
"version": "v2"
}
] | 2019-02-13 | [
[
"Dias",
"Oscar J. C.",
""
],
[
"Reall",
"Harvey S.",
""
],
[
"Santos",
"Jorge E.",
""
]
] | It has been shown recently that the strong cosmic censorship conjecture is violated by near-extremal Reissner-Nordstr\"om-de Sitter black holes. We investigate whether the introduction of a charged scalar field can rescue strong cosmic censorship. We find that such a field improves the situation but there is always a n... |
1201.4151 | Gianluca Calcagni | Gianluca Calcagni, Steffen Gielen, Daniele Oriti | Group field cosmology: a cosmological field theory of quantum geometry | 14 pages, 2 figures. v2: minor typos corrected, references added | Class. Quantum Grav. 29 (2012) 105005 | 10.1088/0264-9381/29/10/105005 | AEI-2011-099; pi-qg-255 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following the idea of a field quantization of gravity as realized in group
field theory, we construct a minisuperspace model where the wavefunction of
canonical quantum cosmology (either Wheeler-DeWitt or loop quantum cosmology)
is promoted to a field, the coordinates are minisuperspace variables, the
kinetic operato... | [
{
"created": "Thu, 19 Jan 2012 19:25:20 GMT",
"version": "v1"
},
{
"created": "Tue, 1 May 2012 09:55:30 GMT",
"version": "v2"
}
] | 2012-05-02 | [
[
"Calcagni",
"Gianluca",
""
],
[
"Gielen",
"Steffen",
""
],
[
"Oriti",
"Daniele",
""
]
] | Following the idea of a field quantization of gravity as realized in group field theory, we construct a minisuperspace model where the wavefunction of canonical quantum cosmology (either Wheeler-DeWitt or loop quantum cosmology) is promoted to a field, the coordinates are minisuperspace variables, the kinetic operator ... |
1404.0946 | Jorge L. Cervantes-Cota | Josue De-Santiago and Jorge L. Cervantes-Cota | Phase space analysis of the F (X) - V (\phi) scalar field Lagrangian and
scaling solutions in flat cosmology | 7 pages, 1 figure | J.Phys.Conf.Ser. 485 (2014) 012017 | 10.1088/1742-6596/485/1/012017 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review a system of autonomous differential equations developed in our
previous work [1] describing a flat cosmology filled with a barotropic fluid
and a scalar field with a modified kinetic term of the form L=F(X)-V(phi). We
analyze the critical points and summarize the conditions to obtain scaling
solutions. We c... | [
{
"created": "Wed, 2 Apr 2014 17:32:51 GMT",
"version": "v1"
}
] | 2014-04-04 | [
[
"De-Santiago",
"Josue",
""
],
[
"Cervantes-Cota",
"Jorge L.",
""
]
] | We review a system of autonomous differential equations developed in our previous work [1] describing a flat cosmology filled with a barotropic fluid and a scalar field with a modified kinetic term of the form L=F(X)-V(phi). We analyze the critical points and summarize the conditions to obtain scaling solutions. We con... |
gr-qc/0411092 | Robert Beig | Robert Beig | Concepts of Hyperbolicity and Relativistic Continuum Mechanics | 12 pages, uses svmult.cls style file, expanded version of lecture
given at 319th WE-Heraeus Seminar on "Mathematical Relativity: New Ideas and
Developments" | Lect.Notes Phys. 692 (2006) 101-116 | 10.1007/11550259_5 | null | gr-qc | null | After a short introduction to the characteristic geometry underlying weakly
hyperbolic systems of partial differential equations we review the notion of
symmetric hyperbolicity of first-order systems and that of regular
hyperbolicity of second-order systems. Numerous examples are provided, mainly
taken from nonrelati... | [
{
"created": "Thu, 18 Nov 2004 11:07:23 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Apr 2005 07:07:36 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Beig",
"Robert",
""
]
] | After a short introduction to the characteristic geometry underlying weakly hyperbolic systems of partial differential equations we review the notion of symmetric hyperbolicity of first-order systems and that of regular hyperbolicity of second-order systems. Numerous examples are provided, mainly taken from nonrelativi... |
2009.08655 | Maxim Makukov | Maxim Makukov and Eduard Mychelkin | Triple path to the exponential metric | Accepted in Foundations of Physics | null | 10.1007/s10701-020-00384-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The exponential Papapetrou metric induced by scalar field conforms to
observational data not worse than the vacuum Schwarzschild solution. Here, we
analyze the origin of this metric as a peculiar space-time within a wide class
of scalar and antiscalar solutions of the Einstein equations parameterized by
scalar charge... | [
{
"created": "Fri, 18 Sep 2020 06:57:07 GMT",
"version": "v1"
}
] | 2020-09-21 | [
[
"Makukov",
"Maxim",
""
],
[
"Mychelkin",
"Eduard",
""
]
] | The exponential Papapetrou metric induced by scalar field conforms to observational data not worse than the vacuum Schwarzschild solution. Here, we analyze the origin of this metric as a peculiar space-time within a wide class of scalar and antiscalar solutions of the Einstein equations parameterized by scalar charge. ... |
gr-qc/0311072 | Fangyu Li | Fang-Yu Li, Zhang-Han Wu, Yi Zhang | The Coupling of a Linearized Gravitational Wave to Electromagnetic
Fields and Relevant Noise Issues | 8 pages, 1 figure | Chin.Phys.Lett. 20 (2003) 1917 | 10.1088/0256-307X/20/11/004 | null | gr-qc | null | According to electrodynamical equations in curved spacetime we consider the
coupling of a linearized weak gravitational wave (GW) to a Gaussian beam
passing through a static magnetic field. It is found that unlike the properties
of the "left-circular" and "right-circular" waves of the tangential
perturbative photon f... | [
{
"created": "Fri, 21 Nov 2003 08:51:02 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Li",
"Fang-Yu",
""
],
[
"Wu",
"Zhang-Han",
""
],
[
"Zhang",
"Yi",
""
]
] | According to electrodynamical equations in curved spacetime we consider the coupling of a linearized weak gravitational wave (GW) to a Gaussian beam passing through a static magnetic field. It is found that unlike the properties of the "left-circular" and "right-circular" waves of the tangential perturbative photon flu... |
0709.4604 | Olivier Minazzoli | Olivier Minazzoli, Bertrand Chauvineau | Relativistic analysis of an earth-satellite time transfer | 4 pages, conference | SF2A-2007: Proceedings of the Annual meeting of the French Society
of Astronomy and Astrophysics held in Grenoble, France, July 2-6, 2007, Eds.:
J. Bouvier, A. Chalabaev, and C. Charbonnel, p.106 | null | null | gr-qc | null | Analytical treatment of time transfer problem for Earth-Satellite system is
presented. The development was made in a complete relativistic framework. In
accordance with modern clock precision and for low altitude orbits, we neglect
the other bodies and consider only the 1/c^2 Earth potential developed up to
the J_2 t... | [
{
"created": "Fri, 28 Sep 2007 12:49:51 GMT",
"version": "v1"
}
] | 2010-02-03 | [
[
"Minazzoli",
"Olivier",
""
],
[
"Chauvineau",
"Bertrand",
""
]
] | Analytical treatment of time transfer problem for Earth-Satellite system is presented. The development was made in a complete relativistic framework. In accordance with modern clock precision and for low altitude orbits, we neglect the other bodies and consider only the 1/c^2 Earth potential developed up to the J_2 ter... |
2103.10920 | Vladimir Ivashchuk | A.N. Malybayev, K.A. Boshkayev, V.D. Ivashchuk | Quasinormal modes in the field of a dyon-like dilatonic black hole | 13 pages, 5 (double) figures, LaTex. Subsection 3.3 is extended; two
typos in formulas (22) and (30) are eliminated; 2 figures and 3 references
are added; a paragraph in Sec. 1 and Remark on page 10 are added; several
phrases are modified. To be published in EPJC | null | 10.1140/epjc/s10052-021-09252-z | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasinormal modes of massless test scalar field in the background of
gravitational field for a non-extremal dilatonic dyonic black hole are
explored. The dyon-like black hole solution is considered in the gravitational
$4d$ model involving two scalar fields and two 2-forms. It is governed by two
2-dimensional dilaton... | [
{
"created": "Fri, 19 Mar 2021 17:28:28 GMT",
"version": "v1"
},
{
"created": "Mon, 17 May 2021 13:58:28 GMT",
"version": "v2"
}
] | 2021-06-16 | [
[
"Malybayev",
"A. N.",
""
],
[
"Boshkayev",
"K. A.",
""
],
[
"Ivashchuk",
"V. D.",
""
]
] | Quasinormal modes of massless test scalar field in the background of gravitational field for a non-extremal dilatonic dyonic black hole are explored. The dyon-like black hole solution is considered in the gravitational $4d$ model involving two scalar fields and two 2-forms. It is governed by two 2-dimensional dilatonic... |
0704.0145 | Ghanashyam Date | Ghanashyam Date | Singularity Resolution in Isotropic Loop Quantum Cosmology: Recent
Developments | 24 pages, no figures. | null | null | IMSc/2007/03/2 | gr-qc | null | Since the past Iagrg meeting in December 2004, new developments in loop
quantum cosmology have taken place, especially with regards to the resolution
of the Big Bang singularity in the isotropic models. The singularity resolution
issue has been discussed in terms of physical quantities (expectation values of
Dirac ob... | [
{
"created": "Mon, 2 Apr 2007 08:56:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Date",
"Ghanashyam",
""
]
] | Since the past Iagrg meeting in December 2004, new developments in loop quantum cosmology have taken place, especially with regards to the resolution of the Big Bang singularity in the isotropic models. The singularity resolution issue has been discussed in terms of physical quantities (expectation values of Dirac obse... |
gr-qc/9801100 | Jose Geraldo Pereira | R. Aldrovandi, A.L. Barbosa, L.C.B. Crispino and J.G. Pereira (IFT -
UNESP / Sao Paulo) | Non-Relativistic Spacetimes with Cosmological Constant | 15 pages, RevTeX, no figures, major changes in the presentation which
includes a new title and a whole new emphasis, version to appear in Clas.
Quant. Grav | Class.Quant.Grav. 16 (1999) 495-506 | 10.1088/0264-9381/16/2/013 | IFT-P.001/99 | gr-qc | null | Recent data on supernovae favor high values of the cosmological constant.
Spacetimes with a cosmological constant have non-relativistic kinematics quite
different from Galilean kinematics. De Sitter spacetimes, vacuum solutions of
Einstein's equations with a cosmological constant, reduce in the
non-relativistic limit... | [
{
"created": "Thu, 29 Jan 1998 15:53:08 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Jan 1999 15:19:05 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Aldrovandi",
"R.",
"",
"IFT -\n UNESP / Sao Paulo"
],
[
"Barbosa",
"A. L.",
"",
"IFT -\n UNESP / Sao Paulo"
],
[
"Crispino",
"L. C. B.",
"",
"IFT -\n UNESP / Sao Paulo"
],
[
"Pereira",
"J. G.",
"",
"IFT -\n UNESP / Sao Paulo"
]
] | Recent data on supernovae favor high values of the cosmological constant. Spacetimes with a cosmological constant have non-relativistic kinematics quite different from Galilean kinematics. De Sitter spacetimes, vacuum solutions of Einstein's equations with a cosmological constant, reduce in the non-relativistic limit t... |
2210.07516 | Tomohiro Harada | Tomohiro Harada, Takahisa Igata, Hiromi Saida and Yohsuke Takamori | General formulae for the periapsis shift of a quasi-circular orbit in
static spherically symmetric spacetimes and the active gravitational mass
density | 25 pages, minor revision, discussion expanded, accepted for
publication in the International Journal of Modern Physics D | International Journal of Modern Physics D Vol. 32, No. 15 (2023)
2350098 (20 pages) | 10.1142/S0218271823500980 | RUP-22-21 | gr-qc astro-ph.GA astro-ph.HE astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the periapsis shift of a quasi-circular orbit in general static
spherically symmetric spacetimes. We derive two formulae in full order with
respect to the gravitational field, one in terms of the gravitational mass $m$
and the Einstein tensor and the other in terms of the orbital angular velocity
and the Ein... | [
{
"created": "Fri, 14 Oct 2022 04:55:40 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Feb 2023 13:17:02 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Jun 2023 01:12:46 GMT",
"version": "v3"
},
{
"created": "Thu, 19 Oct 2023 14:12:00 GMT",
"version": "v4"
},
{
"c... | 2024-01-09 | [
[
"Harada",
"Tomohiro",
""
],
[
"Igata",
"Takahisa",
""
],
[
"Saida",
"Hiromi",
""
],
[
"Takamori",
"Yohsuke",
""
]
] | We study the periapsis shift of a quasi-circular orbit in general static spherically symmetric spacetimes. We derive two formulae in full order with respect to the gravitational field, one in terms of the gravitational mass $m$ and the Einstein tensor and the other in terms of the orbital angular velocity and the Einst... |
gr-qc/0407056 | Mariana Kirchbach | G. D. Acosta, M. Kirchbach | Massive Gauge Fields and the Planck Scale | Affiliation of first author updated; Reference [13] updated; Typos in
Refs. [15], [19] corrected | Found.Phys.Lett. 18 (2005) 157-170 | 10.1007/s10702-005-3959-1 | null | gr-qc | null | The present work is devoted to massive gauge fields in special relativity
with two fundamental constants-the velocity of light, and the Planck length, so
called doubly special relativity (DSR). The two invariant scales are accounted
for by properly modified boost parameters. Within above framework we construct
the ve... | [
{
"created": "Wed, 14 Jul 2004 20:10:01 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Nov 2004 17:40:08 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Acosta",
"G. D.",
""
],
[
"Kirchbach",
"M.",
""
]
] | The present work is devoted to massive gauge fields in special relativity with two fundamental constants-the velocity of light, and the Planck length, so called doubly special relativity (DSR). The two invariant scales are accounted for by properly modified boost parameters. Within above framework we construct the vect... |
1912.13449 | Alexander Grant | \'Eanna \'E. Flanagan, Alexander M. Grant, Abraham I. Harte, David A.
Nichols | Persistent gravitational wave observables: Nonlinear plane wave
spacetimes | 24 pages, 1 figure, 1 table; v2: fixed typos, matches published
version | Phys. Rev. D 101, 104033 (2020) | 10.1103/PhysRevD.101.104033 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the first paper in this series, we introduced "persistent gravitational
wave observables" as a framework for generalizing the gravitational wave memory
effect. These observables are nonlocal in time and nonzero in the presence of
gravitational radiation. We defined three specific examples of persistent
observables... | [
{
"created": "Tue, 31 Dec 2019 17:43:23 GMT",
"version": "v1"
},
{
"created": "Tue, 19 May 2020 12:07:10 GMT",
"version": "v2"
}
] | 2020-05-20 | [
[
"Flanagan",
"Éanna É.",
""
],
[
"Grant",
"Alexander M.",
""
],
[
"Harte",
"Abraham I.",
""
],
[
"Nichols",
"David A.",
""
]
] | In the first paper in this series, we introduced "persistent gravitational wave observables" as a framework for generalizing the gravitational wave memory effect. These observables are nonlocal in time and nonzero in the presence of gravitational radiation. We defined three specific examples of persistent observables: ... |
1806.03684 | S. M. M. Rasouli | S. M. M. Rasouli and Paulo Vargas Moniz | Extended anisotropic models in noncompact Kaluza-Klein theory | 19 pages, 4 figures | Class. Quantum Grav. 36 (2019) 075010 | 10.1088/1361-6382/ab0987 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, new exact solutions for locally rotational symmetric (LRS)
space-times are obtained within the modified Brans-Dicke theory (MBDT) (Rasouli
et al 2014 Class. Quantum Grav. 31 115002). Specifically, extended
five-dimensional (5D) versions of Kantowski-Sachs, LRS Bianchi type I and
Bianchi type III are in... | [
{
"created": "Sun, 10 Jun 2018 16:42:56 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Aug 2018 02:04:30 GMT",
"version": "v2"
},
{
"created": "Sat, 16 Mar 2019 13:43:32 GMT",
"version": "v3"
}
] | 2019-05-22 | [
[
"Rasouli",
"S. M. M.",
""
],
[
"Moniz",
"Paulo Vargas",
""
]
] | In this paper, new exact solutions for locally rotational symmetric (LRS) space-times are obtained within the modified Brans-Dicke theory (MBDT) (Rasouli et al 2014 Class. Quantum Grav. 31 115002). Specifically, extended five-dimensional (5D) versions of Kantowski-Sachs, LRS Bianchi type I and Bianchi type III are inve... |
1603.07750 | Parthapratim Pradhan | Parthapratim Pradhan | $P-V$ Criticality of Conformal Gravity Holography in Four Dimensions | Accepted in MPLA, Modern Physics Letters A, 2018 | null | 10.1142/S021773231850030X | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | {We examine the critical behaviour i. e. $P-V$ criticality of conformal
gravity~(CG) in an extended phase space in which the cosmological constant
should be interpreted as a thermodynamic pressure and the corresponding
conjugate quantity as a thermodynamic volume.} The main potential point of
interest in CG is that t... | [
{
"created": "Thu, 24 Mar 2016 20:49:55 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jun 2016 07:44:33 GMT",
"version": "v2"
},
{
"created": "Sat, 17 Feb 2018 10:50:54 GMT",
"version": "v3"
}
] | 2018-02-20 | [
[
"Pradhan",
"Parthapratim",
""
]
] | {We examine the critical behaviour i. e. $P-V$ criticality of conformal gravity~(CG) in an extended phase space in which the cosmological constant should be interpreted as a thermodynamic pressure and the corresponding conjugate quantity as a thermodynamic volume.} The main potential point of interest in CG is that the... |
2206.10387 | Hamed Hadi | H. Hadi, F. Darabi, K.Atazadeh | Quantum time in near-horizon region of a black hole | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The understanding of time and dynamics can be elucidated by examining the
concept of entanglement in quantum theory. This particular perspective on time
is referred to as the timeless approach, which posits that the universe exists
in a fixed state where two separate subsystems, namely the "clock" and the
"rest," are... | [
{
"created": "Fri, 17 Jun 2022 13:37:45 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Dec 2023 12:12:13 GMT",
"version": "v2"
}
] | 2023-12-07 | [
[
"Hadi",
"H.",
""
],
[
"Darabi",
"F.",
""
],
[
"Atazadeh",
"K.",
""
]
] | The understanding of time and dynamics can be elucidated by examining the concept of entanglement in quantum theory. This particular perspective on time is referred to as the timeless approach, which posits that the universe exists in a fixed state where two separate subsystems, namely the "clock" and the "rest," are e... |
1807.03270 | Guilherme de Berredo-Peixoto | G. de Berredo-Peixoto | Non-metricities, torsion and fermions | 13 pages, LaTeX, no figures. Second version: I added some new
references for completeness | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I investigate the general extension of Einstein's gravity by considering the
third rank non-metricity tensor and the torsion tensor. The minimal coupling to
Dirac fields faces an ambiguity coming from a severe arbitrariness of the
Fock-Ivanenko coefficients. This arbitrariness is fed in part by the covariant
derivati... | [
{
"created": "Mon, 9 Jul 2018 16:53:29 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Aug 2018 14:38:36 GMT",
"version": "v2"
}
] | 2018-08-07 | [
[
"de Berredo-Peixoto",
"G.",
""
]
] | I investigate the general extension of Einstein's gravity by considering the third rank non-metricity tensor and the torsion tensor. The minimal coupling to Dirac fields faces an ambiguity coming from a severe arbitrariness of the Fock-Ivanenko coefficients. This arbitrariness is fed in part by the covariant derivative... |
gr-qc/0203046 | W. B. Bonnor | W.B.Bonnor | Interaction between a stationary electric charge and a stationary
magnetic dipole | 11 pages, LaTeX | Class.Quant.Grav. 18 (2001) 2853 | 10.1088/0264-9381/18/15/301 | null | gr-qc | null | Using Einstein-Maxwell theory I investigate the gravitational field generated
by an electric charge and a magnetic dipole, both held in fixed positions, but
spinning with prescribed angular momenta. There is a conical singularity
between them representing a strut balancing the gravitational attraction of
their masses... | [
{
"created": "Wed, 13 Mar 2002 13:49:56 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Bonnor",
"W. B.",
""
]
] | Using Einstein-Maxwell theory I investigate the gravitational field generated by an electric charge and a magnetic dipole, both held in fixed positions, but spinning with prescribed angular momenta. There is a conical singularity between them representing a strut balancing the gravitational attraction of their masses. ... |
2010.02237 | Pierre Christian | Pierre Christian and Chi-kwan Chan | FANTASY: User-Friendly Symplectic Geodesic Integrator for Arbitrary
Metrics with Automatic Differentiation | Minor typos corrected, matches accepted version | null | 10.3847/1538-4357/abdc28 | null | gr-qc astro-ph.HE physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present FANTASY (Finally A Numerical Trajectory Algorithm both
Straightforward and sYmplectic), a user-friendly, open-source symplectic
geodesic integrator written in Python. FANTASY is designed to work
"out-of-the-box" and does not require anything from the user aside from the
metric and the initial conditions fo... | [
{
"created": "Mon, 5 Oct 2020 18:00:12 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jan 2021 02:57:30 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Jan 2021 00:13:17 GMT",
"version": "v3"
},
{
"created": "Tue, 9 Feb 2021 23:05:23 GMT",
"version": "v4"
}
] | 2021-03-17 | [
[
"Christian",
"Pierre",
""
],
[
"Chan",
"Chi-kwan",
""
]
] | We present FANTASY (Finally A Numerical Trajectory Algorithm both Straightforward and sYmplectic), a user-friendly, open-source symplectic geodesic integrator written in Python. FANTASY is designed to work "out-of-the-box" and does not require anything from the user aside from the metric and the initial conditions for ... |
1908.03416 | Emil Zeuthen | Emil Zeuthen and Eugene S. Polzik and Farid Ya. Khalili | Gravitational wave detection beyond the standard quantum limit using a
negative-mass spin system and virtual rigidity | Minor typos fixed, minor editing; 12 pages, 5 figures | Phys. Rev. D 100, 062004 (2019) | 10.1103/PhysRevD.100.062004 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave detectors (GWDs), which have brought about a new era in
astronomy, have reached such a level of maturity that further improvement
necessitates quantum-noise-evading techniques. Numerous proposals to this end
have been discussed in the literature, e.g., invoking frequency-dependent
squeezing or repl... | [
{
"created": "Fri, 9 Aug 2019 11:24:15 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Sep 2019 19:38:00 GMT",
"version": "v2"
}
] | 2019-09-26 | [
[
"Zeuthen",
"Emil",
""
],
[
"Polzik",
"Eugene S.",
""
],
[
"Khalili",
"Farid Ya.",
""
]
] | Gravitational wave detectors (GWDs), which have brought about a new era in astronomy, have reached such a level of maturity that further improvement necessitates quantum-noise-evading techniques. Numerous proposals to this end have been discussed in the literature, e.g., invoking frequency-dependent squeezing or replac... |
2008.12069 | Nils Andersson | N. Andersson and G.L.C. Comer | Relativistic fluid dynamics: physics for many different scales | Update of invited review for Living Reviews in Relativity, original
version from 2007. Substantial revision just under 250 pages with about 450
references. Comments welcome | null | 10.1007/s41114-021-00031-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relativistic fluid is a highly successful model used to describe the
dynamics of many-particle systems moving at high velocities and/or in strong
gravity. It takes as input physics from microscopic scales and yields as output
predictions of bulk, macroscopic motion. By inverting the process-e.g., drawing
on astro... | [
{
"created": "Thu, 27 Aug 2020 11:56:23 GMT",
"version": "v1"
}
] | 2021-07-07 | [
[
"Andersson",
"N.",
""
],
[
"Comer",
"G. L. C.",
""
]
] | The relativistic fluid is a highly successful model used to describe the dynamics of many-particle systems moving at high velocities and/or in strong gravity. It takes as input physics from microscopic scales and yields as output predictions of bulk, macroscopic motion. By inverting the process-e.g., drawing on astroph... |
1901.07310 | Zi-Yu Tang | Zi-Yu Tang, Yen Chin Ong, Bin Wang, Eleftherios Papantonopoulos | General Black Hole Solutions in (2+1)-dimensions with a Scalar Field
Non-Minimally Coupled to Gravity | To be published in PRD | Phys. Rev. D 100, 024003 (2019) | 10.1103/PhysRevD.100.024003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss black hole solutions in (2+1)-dimensions with a scalar field
non-minimally coupled to Einstein's gravity in the presence of a cosmological
constant and a self-interacting scalar potential. Without specifying the form
of the potential, we find a general solution of the field equations, which
includes all th... | [
{
"created": "Tue, 22 Jan 2019 14:10:46 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jun 2019 04:40:52 GMT",
"version": "v2"
}
] | 2019-07-17 | [
[
"Tang",
"Zi-Yu",
""
],
[
"Ong",
"Yen Chin",
""
],
[
"Wang",
"Bin",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
]
] | We discuss black hole solutions in (2+1)-dimensions with a scalar field non-minimally coupled to Einstein's gravity in the presence of a cosmological constant and a self-interacting scalar potential. Without specifying the form of the potential, we find a general solution of the field equations, which includes all the ... |
1905.08113 | Wytler Cordeiro dos Santos | Wytler Cordeiro dos Santos | Introduction to Gauge Theory of Gravitation | 23 pages | e-Boletim da F\'isica - SSN:2318-8901 eBFIS77244(2019) | 10.26512/e-bfis.v8i1.23241 | v. 8 n. 1 (2019): VII EFRAS | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The fundamental interactions of nature, the electroweak and the quantum
chromodynamics, are described in the Standard Model by the Gauge Theory under
internal symmetries that maintain the invariance of the functional action. The
fundamental interaction of gravitation is very well described by Einstein's
General Relat... | [
{
"created": "Mon, 20 May 2019 13:49:21 GMT",
"version": "v1"
}
] | 2019-05-21 | [
[
"Santos",
"Wytler Cordeiro dos",
""
]
] | The fundamental interactions of nature, the electroweak and the quantum chromodynamics, are described in the Standard Model by the Gauge Theory under internal symmetries that maintain the invariance of the functional action. The fundamental interaction of gravitation is very well described by Einstein's General Relativ... |
2301.02267 | Costantino Pacilio | Costantino Pacilio, Swetha Bhagwat | Identifying modified theories of gravity using binary black-hole
ringdowns | v1: 14 pages, 4 figures. v2: matches published version | null | 10.1103/PhysRevD.107.083021 | null | gr-qc astro-ph.HE hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Black-hole spectroscopy, that is, measuring the characteristic frequencies
and damping times of different modes in a black-hole ringdown, is a powerful
probe for testing deviations from the general theory of relativity (GR). In
this work, we present a comprehensive study on its ability to identify
deviations from the... | [
{
"created": "Thu, 5 Jan 2023 19:01:09 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Apr 2023 17:09:56 GMT",
"version": "v2"
}
] | 2023-04-14 | [
[
"Pacilio",
"Costantino",
""
],
[
"Bhagwat",
"Swetha",
""
]
] | Black-hole spectroscopy, that is, measuring the characteristic frequencies and damping times of different modes in a black-hole ringdown, is a powerful probe for testing deviations from the general theory of relativity (GR). In this work, we present a comprehensive study on its ability to identify deviations from the s... |
2006.07913 | Yu-Xiao Liu | Zi-Chao Lin, Ke Yang, Shao-Wen Wei, Yong-Qiang Wang, Yu-Xiao Liu | Equivalence of solutions between the four-dimensional novel and
regularized EGB theories in a cylindrically symmetric spacetime | 20 pages, 9 figures, published version | Eur. Phys. J. C 80, 1033 (2020) | 10.1140/epjc/s10052-020-08612-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, a novel four-dimensional Einstein-Gauss-Bonnet (EGB) theory was
presented to bypass the Lovelock's theorem and to give nontrivial effects on
the four-dimensional local gravity. The main mechanism is to introduce a
redefinition $\alpha\rightarrow\alpha/(D-4)$ and to take the limit
$D\rightarrow4$. However, t... | [
{
"created": "Sun, 14 Jun 2020 14:24:23 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Nov 2020 08:35:04 GMT",
"version": "v2"
}
] | 2020-11-19 | [
[
"Lin",
"Zi-Chao",
""
],
[
"Yang",
"Ke",
""
],
[
"Wei",
"Shao-Wen",
""
],
[
"Wang",
"Yong-Qiang",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | Recently, a novel four-dimensional Einstein-Gauss-Bonnet (EGB) theory was presented to bypass the Lovelock's theorem and to give nontrivial effects on the four-dimensional local gravity. The main mechanism is to introduce a redefinition $\alpha\rightarrow\alpha/(D-4)$ and to take the limit $D\rightarrow4$. However, thi... |
1307.0172 | Houwen Wu | Deyou Chen, Houwen Wu, Haitang Yang | Observing remnants by fermions' tunneling | V2, 14 pages, typos corrected, version to appear in JCAP | JCAP 1403 (2014) 036 | 10.1088/1475-7516/2014/03/036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The standard Hawking formula predicts the complete evaporation of black
holes. In this paper, we introduce effects of quantum gravity into fermions'
tunneling from Reissner-Nordstrom and Kerr black holes. The quantum gravity
effects slow down the increase of Hawking temperatures. This property naturally
leads to a re... | [
{
"created": "Sun, 30 Jun 2013 02:39:18 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Mar 2014 16:05:25 GMT",
"version": "v2"
}
] | 2014-10-27 | [
[
"Chen",
"Deyou",
""
],
[
"Wu",
"Houwen",
""
],
[
"Yang",
"Haitang",
""
]
] | The standard Hawking formula predicts the complete evaporation of black holes. In this paper, we introduce effects of quantum gravity into fermions' tunneling from Reissner-Nordstrom and Kerr black holes. The quantum gravity effects slow down the increase of Hawking temperatures. This property naturally leads to a resi... |
1310.2384 | Florent Robinet | J. Aasi, J. Abadie, B. P. Abbott, R. Abbott, T. Abbott, M. R.
Abernathy, T. Accadia, F. Acernese, C. Adams, T. Adams, R. X. Adhikari, C.
Affeldt, M. Agathos, N. Aggarwal, O. D. Aguiar, P. Ajith, B. Allen, A.
Allocca, E. Amador Ceron, D. Amariutei, R. A. Anderson, S. B. Anderson, W. G.
Anderson, K. Arai, M. C. A... | Constraints on cosmic strings from the LIGO-Virgo gravitational-wave
detectors | null | Phys. Rev. Lett. 112, 131101 (2014) | 10.1103/PhysRevLett.112.131101 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmic strings can give rise to a large variety of interesting astrophysical
phenomena. Among them, powerful bursts of gravitational waves (GWs) produced by
cusps are a promising observational signature. In this Letter we present a
search for GWs from cosmic string cusps in data collected by the LIGO and Virgo
gravit... | [
{
"created": "Wed, 9 Oct 2013 07:41:30 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Apr 2014 06:37:24 GMT",
"version": "v2"
}
] | 2014-04-08 | [
[
"Aasi",
"J.",
""
],
[
"Abadie",
"J.",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T.",
""
],
[
"Abernathy",
"M. R.",
""
],
[
"Accadia",
"T.",
""
],
[
"Acernese",
"F.",
... | Cosmic strings can give rise to a large variety of interesting astrophysical phenomena. Among them, powerful bursts of gravitational waves (GWs) produced by cusps are a promising observational signature. In this Letter we present a search for GWs from cosmic string cusps in data collected by the LIGO and Virgo gravitat... |
1111.5434 | Kiyoshi Shiraishi | Nahomi Kan (Yamaguchi Junior College), Koichro Kobayashi and Kiyoshi
Shiraishi (Yamaguchi University) | Einstein Universe under Deconstruction: the case with degenerate
fermions | 4 pages, 1 eps figure. To appear in the Proceedings of 21st Workshop
in General Relativity and Gravitation in Japan (JGRG21), held in Sakura Hall,
Katahira Campus, Tohoku University, Sendai, Japan (26 - 29 September 2011) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study self-consistent static solutions for an Einstein universe in a
graph-based induced gravity. In the generalization of the deconstruction model
based on the graph, the eigenvalues of the graph Laplacian and the adjacent
matrix gives the mass spectrum the particles. Thus we can easily control UV
divergences at ... | [
{
"created": "Wed, 23 Nov 2011 09:04:26 GMT",
"version": "v1"
}
] | 2011-11-24 | [
[
"Kan",
"Nahomi",
"",
"Yamaguchi Junior College"
],
[
"Kobayashi",
"Koichro",
"",
"Yamaguchi University"
],
[
"Shiraishi",
"Kiyoshi",
"",
"Yamaguchi University"
]
] | We study self-consistent static solutions for an Einstein universe in a graph-based induced gravity. In the generalization of the deconstruction model based on the graph, the eigenvalues of the graph Laplacian and the adjacent matrix gives the mass spectrum the particles. Thus we can easily control UV divergences at on... |
1104.0152 | Anjan Ananda Sen | N. Chandrachani Devi, Sudhakar Panda, Anjan A Sen | Solar System Constraints on Scalar Tensor Theories with Non-Standard
Action | 7 pages, Revtex style, two eps figures, revised version, accepted for
publication in Physical Review D | null | 10.1103/PhysRevD.84.063521 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the Post-Newtonian parameter (PPN),$\gamma$, for scalar-tensor
gravity theory when the action functional for the scalar field is a
non-standard one, namely the Dirac-Born-Infeld (DBI) type action, used in the
literature for a tachyon field. We investigate two different cases (Linear and
conformal couplings... | [
{
"created": "Fri, 1 Apr 2011 12:15:47 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Apr 2011 12:24:41 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Aug 2011 04:42:05 GMT",
"version": "v3"
}
] | 2015-05-27 | [
[
"Devi",
"N. Chandrachani",
""
],
[
"Panda",
"Sudhakar",
""
],
[
"Sen",
"Anjan A",
""
]
] | We compute the Post-Newtonian parameter (PPN),$\gamma$, for scalar-tensor gravity theory when the action functional for the scalar field is a non-standard one, namely the Dirac-Born-Infeld (DBI) type action, used in the literature for a tachyon field. We investigate two different cases (Linear and conformal couplings) ... |
1203.5407 | Luis Cort\'es Barbado | Luis C. Barbado, Carlos Barcel\'o, Luis J. Garay | Hawking radiation as perceived by different observers (ERE2011
proceedings) | Proccedings of the Spanish Relativity Meeting 2011. 4 pages, 4
figures | AIP Conf. Proc. 1458 (2012), pp. 363-366 | 10.1063/1.4734435 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the perception of Hawking radiation by different observers outside a
black hole. The analysis is done in terms of an effective-temperature function
that varies along the trajectory of each observer. The vacuum state of the
radiation field is chosen to be non-stationary, so as to mimic the switching-on
of Haw... | [
{
"created": "Sat, 24 Mar 2012 11:48:04 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Oct 2012 08:51:55 GMT",
"version": "v2"
}
] | 2012-10-02 | [
[
"Barbado",
"Luis C.",
""
],
[
"Barceló",
"Carlos",
""
],
[
"Garay",
"Luis J.",
""
]
] | We study the perception of Hawking radiation by different observers outside a black hole. The analysis is done in terms of an effective-temperature function that varies along the trajectory of each observer. The vacuum state of the radiation field is chosen to be non-stationary, so as to mimic the switching-on of Hawki... |
1509.03725 | Diego Pavon | Pedro C. Ferreira and Diego Pavon | Thermodynamics of nonsingular bouncing universes | 12 pages, 3 figures. Version published in the European Physical
Journal C | Eur. Phys. J. C (2016) 76:37 | 10.1140/epjc/s10052-016-3886-2 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Homogeneous and isotropic, nonsingular, bouncing world models are designed to
evade the initial singularity at the beginning of the cosmic expansion. Here,
we study the thermodynamics of the subset of these models governed by general
relativity. Considering the entropy of matter, radiation and that the entropy
of the... | [
{
"created": "Sat, 12 Sep 2015 09:32:12 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Nov 2015 14:23:01 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Dec 2015 10:28:46 GMT",
"version": "v3"
},
{
"created": "Fri, 5 Feb 2016 11:45:13 GMT",
"version": "v4"
}
] | 2016-03-09 | [
[
"Ferreira",
"Pedro C.",
""
],
[
"Pavon",
"Diego",
""
]
] | Homogeneous and isotropic, nonsingular, bouncing world models are designed to evade the initial singularity at the beginning of the cosmic expansion. Here, we study the thermodynamics of the subset of these models governed by general relativity. Considering the entropy of matter, radiation and that the entropy of the a... |
1909.12251 | Maria Okounkova | Maria Okounkova | Stability of rotating black holes in Einstein dilaton Gauss-Bonnet
gravity | 4 pages, 5 figures | Phys. Rev. D 100, 124054 (2019) | 10.1103/PhysRevD.100.124054 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to perform model-dependent tests of general relativity with
gravitational wave observations, we must have access to numerical relativity
binary black hole waveforms in theories beyond general relativity (GR). In this
study, we focus on order-reduced Einstein dilaton Gauss-Bonnet gravity (EDGB),
a higher curv... | [
{
"created": "Thu, 26 Sep 2019 16:57:32 GMT",
"version": "v1"
}
] | 2020-01-01 | [
[
"Okounkova",
"Maria",
""
]
] | In order to perform model-dependent tests of general relativity with gravitational wave observations, we must have access to numerical relativity binary black hole waveforms in theories beyond general relativity (GR). In this study, we focus on order-reduced Einstein dilaton Gauss-Bonnet gravity (EDGB), a higher curvat... |
1512.05331 | Andrzej Banburski | Andrzej Banburski and Lin-Qing Chen | A simpler way of imposing simplicity constraints | 16 pages | Phys. Rev. D 94, 104003 (2016) | 10.1103/PhysRevD.94.104003 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a way of imposing simplicity constraints in a holomorphic Spin
Foam model that we recently introduced. Rather than imposing the constraints on
the boundary spin network, as is usually done, one can impose the constraints
directly on the Spin Foam propagator. We find that the two approaches have the
sam... | [
{
"created": "Wed, 16 Dec 2015 20:53:50 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Banburski",
"Andrzej",
""
],
[
"Chen",
"Lin-Qing",
""
]
] | We investigate a way of imposing simplicity constraints in a holomorphic Spin Foam model that we recently introduced. Rather than imposing the constraints on the boundary spin network, as is usually done, one can impose the constraints directly on the Spin Foam propagator. We find that the two approaches have the same ... |
gr-qc/9511049 | Thomas Thiemann | Thomas Thiemann | An account of transforms on \bar {{\cal A}/{\cal G}} | 19 pages, Latex, Contribution to the Workshop ``Recent mathematical
developments in classical and quantum gravity, Sintra, Portugal 1995 | Acta Cosmologica 21:145-167,1996 | null | CGPG-95/11-3, HUTMP-95/B-347 | gr-qc hep-th | null | In this article we summarize and describe the recently found transforms for
theories of connections modulo gauge transformations associated with compact
gauge groups. Specifically, we put into a coherent picture the so-called loop
transform, the inverse loop transform, the coherent state transform and finally
the Wic... | [
{
"created": "Thu, 16 Nov 1995 23:56:19 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Thiemann",
"Thomas",
""
]
] | In this article we summarize and describe the recently found transforms for theories of connections modulo gauge transformations associated with compact gauge groups. Specifically, we put into a coherent picture the so-called loop transform, the inverse loop transform, the coherent state transform and finally the Wick ... |
1912.05674 | Rohan Raha | Rohan Raha | Euclidean quantum gravity for Kerr-Newman Spacetimes | arXiv admin note: text overlap with arXiv:gr-qc/9903089 by other
authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is very important to calculate the amount of radiation from a black hole
as the radiation from a black hole contributes to its entropy. In this paper I
have calculated the Entropy of a black hole from the action. I have used path
integral formalism to calculate the second order perturbation of the metric in
the ac... | [
{
"created": "Wed, 11 Dec 2019 22:31:04 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Jan 2020 19:24:28 GMT",
"version": "v2"
}
] | 2020-01-07 | [
[
"Raha",
"Rohan",
""
]
] | It is very important to calculate the amount of radiation from a black hole as the radiation from a black hole contributes to its entropy. In this paper I have calculated the Entropy of a black hole from the action. I have used path integral formalism to calculate the second order perturbation of the metric in the acti... |
gr-qc/0405066 | Nikolaos Mavromatos | John Ellis, Nikolaos E. Mavromatos and Michael Westmuckett | A supersymmetric D-brane Model of Space-Time Foam | 33 pages, latex, five figures | Phys.Rev.D70:044036,2004 | 10.1103/PhysRevD.70.044036 | CERN-PH-TH/2004-074 | gr-qc hep-ph hep-th | null | We present a supersymmetric model of space-time foam with two stacks of eight
D8-branes with equal string tensions, separated by a single bulk dimension
containing D0-brane particles that represent quantum fluctuations in the
space-time foam. The ground state configuration with static D-branes has zero
vacuum energy.... | [
{
"created": "Wed, 12 May 2004 19:19:37 GMT",
"version": "v1"
}
] | 2009-09-11 | [
[
"Ellis",
"John",
""
],
[
"Mavromatos",
"Nikolaos E.",
""
],
[
"Westmuckett",
"Michael",
""
]
] | We present a supersymmetric model of space-time foam with two stacks of eight D8-branes with equal string tensions, separated by a single bulk dimension containing D0-brane particles that represent quantum fluctuations in the space-time foam. The ground state configuration with static D-branes has zero vacuum energy. H... |
2103.03245 | V. G. Gurzadyan | M.Samsonyan, A.A.Kocharyan, A.Stepanian, V.G.Gurzadyan | Cosmic voids and induced hyperbolicity. II. Sensitivity to void/wall
scales | 6 pages, 3 figs; Eur. Phys. J. Plus (in press); published version | Eur. Phys. J. Plus 136, 350 (2021) | 10.1140/epjp/s13360-021-01310-5 | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | Cosmic voids as typical under-density regions in the large scale Universe are
known for their hyperbolic properties as an ability to deviate the photon
beams. The under-density then is acting as the negative curvature in the
hyperbolic spaces. The hyperbolicity of voids has to lead to distortion in the
statistical an... | [
{
"created": "Thu, 4 Mar 2021 03:07:05 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Mar 2021 03:37:06 GMT",
"version": "v2"
}
] | 2021-04-07 | [
[
"Samsonyan",
"M.",
""
],
[
"Kocharyan",
"A. A.",
""
],
[
"Stepanian",
"A.",
""
],
[
"Gurzadyan",
"V. G.",
""
]
] | Cosmic voids as typical under-density regions in the large scale Universe are known for their hyperbolic properties as an ability to deviate the photon beams. The under-density then is acting as the negative curvature in the hyperbolic spaces. The hyperbolicity of voids has to lead to distortion in the statistical anal... |
0905.2572 | Pia Astone | Sergio Frasca, Pia Astone | Robust estimation of the parameters of a disturbed non-stationary
Gaussian process | 10 pages; Presented to the GWDAW13 workshop, Jan 2009 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A typical problem in the detection of the gravitational waves in the data of
gravitational antennas is the non-stationarity of the Gaussian noise (and so
the varying sensitivity) and the presence of big impulsive disturbances. In
such conditions the estimation of the standard deviation of the Gaussian
process done wi... | [
{
"created": "Fri, 15 May 2009 15:49:36 GMT",
"version": "v1"
}
] | 2009-05-18 | [
[
"Frasca",
"Sergio",
""
],
[
"Astone",
"Pia",
""
]
] | A typical problem in the detection of the gravitational waves in the data of gravitational antennas is the non-stationarity of the Gaussian noise (and so the varying sensitivity) and the presence of big impulsive disturbances. In such conditions the estimation of the standard deviation of the Gaussian process done with... |
1807.10360 | Nadiezha Montelongo Garcia | Gabino Estevez Delgado, Joaquin Estevez Delgado, Nadiezhda Montelongo
Garcia, Modesto Pineda Duran | A perfect fluid model for compact stars | 7 pages, 4 figures | null | 10.1139/cjp-2018-0497 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of Einstein's the theory of general relativity we present a
new interior solution with a perfect fluid, this is constructed from the
proposal of a gravitational redshift factor. The geometry is regular and its
density and pressure are monotonic decrescent functions, furthermore the sound
speed is sma... | [
{
"created": "Thu, 26 Jul 2018 20:49:29 GMT",
"version": "v1"
}
] | 2019-10-02 | [
[
"Delgado",
"Gabino Estevez",
""
],
[
"Delgado",
"Joaquin Estevez",
""
],
[
"Garcia",
"Nadiezhda Montelongo",
""
],
[
"Duran",
"Modesto Pineda",
""
]
] | In the framework of Einstein's the theory of general relativity we present a new interior solution with a perfect fluid, this is constructed from the proposal of a gravitational redshift factor. The geometry is regular and its density and pressure are monotonic decrescent functions, furthermore the sound speed is small... |
gr-qc/9911118 | Marco Zagermann | Othmar Brodbeck and Marco Zagermann | Dimensionally Reduced Gravity, Hermitian Symmetric Spaces and the
Ashtekar Variables | 20 pages, no figures, Latex2e | Class.Quant.Grav. 17 (2000) 2749-2764 | 10.1088/0264-9381/17/14/310 | PSU-TH-223 | gr-qc hep-th | null | Dimensional reductions of various higher dimensional (super)gravity theories
lead to effectively two-dimensional field theories described by gravity coupled
G/H nonlinear sigma-models. We show that a new set of complexified variables
can be introduced when G/H is a Hermitian symmetric space. This generalizes an
earli... | [
{
"created": "Mon, 29 Nov 1999 20:24:12 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Brodbeck",
"Othmar",
""
],
[
"Zagermann",
"Marco",
""
]
] | Dimensional reductions of various higher dimensional (super)gravity theories lead to effectively two-dimensional field theories described by gravity coupled G/H nonlinear sigma-models. We show that a new set of complexified variables can be introduced when G/H is a Hermitian symmetric space. This generalizes an earlier... |
2101.00415 | A. C. Khunt | A. C. Khunt, V. O. Thomas, P. C. Vinodkumar | Distinct Classes of Compact Stars Based On Geometrically Deduced
Equations of State | 19 pages, 8 figures | null | 10.1142/S0218271821500292 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We have computed the properties of compact objects like neutron stars based
on equation of state (EOS) deduced from a core-envelope model of superdense
stars. Such superdense stars have been studied by solving the Einstein's
equation based on pseudo-spheroidal and spherically symmetric space-time
geometry. The comput... | [
{
"created": "Sat, 2 Jan 2021 10:27:01 GMT",
"version": "v1"
}
] | 2021-04-21 | [
[
"Khunt",
"A. C.",
""
],
[
"Thomas",
"V. O.",
""
],
[
"Vinodkumar",
"P. C.",
""
]
] | We have computed the properties of compact objects like neutron stars based on equation of state (EOS) deduced from a core-envelope model of superdense stars. Such superdense stars have been studied by solving the Einstein's equation based on pseudo-spheroidal and spherically symmetric space-time geometry. The computed... |
gr-qc/0611044 | Stefan Hollands | Stefan Hollands and Donald Marolf | Asymptotic generators of fermionic charges and boundary conditions
preserving supersymmetry | 45 pages, Latex, no figures, v2: extended discussion of positive
energy theorem and explicit form of fermionic generators, references added | Class.Quant.Grav.24:2301-2332,2007 | 10.1088/0264-9381/24/9/010 | null | gr-qc hep-th | null | We use a covariant phase space formalism to give a general prescription for
defining Hamiltonian generators of bosonic and fermionic symmetries in
diffeomorphism invariant theories, such as supergravities. A simple and general
criterion is derived for a choice of boundary condition to lead to conserved
generators of ... | [
{
"created": "Tue, 7 Nov 2006 08:04:42 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Dec 2006 14:27:01 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Hollands",
"Stefan",
""
],
[
"Marolf",
"Donald",
""
]
] | We use a covariant phase space formalism to give a general prescription for defining Hamiltonian generators of bosonic and fermionic symmetries in diffeomorphism invariant theories, such as supergravities. A simple and general criterion is derived for a choice of boundary condition to lead to conserved generators of th... |
2405.01003 | Maur\'icio Richartz | Maur\'icio Richartz, Jo\~ao Lu\'is Rosa, Emanuele Berti | Bounds on the mass of superradiantly unstable scalar fields around Kerr
black holes | 8 pages, 7 figures. v2: typos corrected, reference added | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we compute numerical bounds on the mass $\mu$ of superradiantly
unstable scalar fields in a Kerr black hole background using the continued
fraction method. We show that the normalized upper bound on the mass $\mu$
increases with the angular momentum number $\ell$ and the azimuthal number $m$,
approaching... | [
{
"created": "Thu, 2 May 2024 05:02:13 GMT",
"version": "v1"
},
{
"created": "Mon, 6 May 2024 14:47:47 GMT",
"version": "v2"
}
] | 2024-05-07 | [
[
"Richartz",
"Maurício",
""
],
[
"Rosa",
"João Luís",
""
],
[
"Berti",
"Emanuele",
""
]
] | In this work we compute numerical bounds on the mass $\mu$ of superradiantly unstable scalar fields in a Kerr black hole background using the continued fraction method. We show that the normalized upper bound on the mass $\mu$ increases with the angular momentum number $\ell$ and the azimuthal number $m$, approaching t... |
gr-qc/0607068 | Madhavan Varadarajan | Madhavan Varadarajan | Dirac Quantization of Parametrized Field Theory | 33 pages | Phys.Rev.D75:044018,2007 | 10.1103/PhysRevD.75.044018 | null | gr-qc | null | Parametrized field theory (PFT) is free field theory on flat spacetime in a
diffeomorphism invariant disguise. It describes field evolution on arbitrary
foliations of the flat spacetime instead of only the usual flat ones, by
treating the `embedding variables' which describe the foliation as dynamical
variables to be... | [
{
"created": "Tue, 18 Jul 2006 08:45:28 GMT",
"version": "v1"
}
] | 2015-01-30 | [
[
"Varadarajan",
"Madhavan",
""
]
] | Parametrized field theory (PFT) is free field theory on flat spacetime in a diffeomorphism invariant disguise. It describes field evolution on arbitrary foliations of the flat spacetime instead of only the usual flat ones, by treating the `embedding variables' which describe the foliation as dynamical variables to be v... |
gr-qc/9610020 | Alberto Carlini | A. Carlini and J. Greensite | The mass shell of the universe | plain latex file, 25 pags | Phys.Rev. D55 (1997) 3514-3524 | 10.1103/PhysRevD.55.3514 | TIT/HEP-346/COSMO-79 | gr-qc hep-th | null | The classical field equations of general relativity can be expressed as a
single geodesic equation, describing the free fall of a point particle in
superspace. Based on this formulation, a ``worldline'' quantization of gravity,
analogous to the Feynman-Schwinger treatment of particle propagation, is
proposed, and a h... | [
{
"created": "Sat, 12 Oct 1996 07:48:29 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Carlini",
"A.",
""
],
[
"Greensite",
"J.",
""
]
] | The classical field equations of general relativity can be expressed as a single geodesic equation, describing the free fall of a point particle in superspace. Based on this formulation, a ``worldline'' quantization of gravity, analogous to the Feynman-Schwinger treatment of particle propagation, is proposed, and a hid... |
gr-qc/9603004 | Lee Samuel Finn | Lee Samuel Finn (Physics and Astronomy Department, Northwestern
University) | A numerical approach to binary black hole coalescence | 20 pages (including two figures) LaTeX w/amssymb, amsbsy, epsf and
sprocl (available from http://www.wspc.co.uk/wspc/index.html) macro packages.
A written version of the plenary lecture by the same name delivered at GR14.
To appear in proceedings of the GR14 conference | null | null | null | gr-qc | null | The nature of binary black hole coalescence is the final, uncharted frontier
of the relativistic Kepler problem. In the United States, binary black hole
coalescence has been identified as a computational ``Grand Challenge'' whose
solution is the object of a coordinated effort, just reaching its half-way
point, by mor... | [
{
"created": "Tue, 5 Mar 1996 19:33:04 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Finn",
"Lee Samuel",
"",
"Physics and Astronomy Department, Northwestern\n University"
]
] | The nature of binary black hole coalescence is the final, uncharted frontier of the relativistic Kepler problem. In the United States, binary black hole coalescence has been identified as a computational ``Grand Challenge'' whose solution is the object of a coordinated effort, just reaching its half-way point, by more ... |
1102.4919 | Rakesh Tibrewala | T.R. Govindarajan and Rakesh Tibrewala | Novel black hole bound states and entropy | 13 pages, 3 figures, approximate formula for energy spectrum added at
the end of section 2.1 along with additional minor changes to comply with the
version accepted in PRD | Phys. Rev. D 83, 124045 (2011) | 10.1103/PhysRevD.83.124045 | IMSC/2011/2/3 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We solve for the spectrum of the Laplacian as a Hamiltonian on
$\mathbb{R}^{2}-\mathbb{D}$ and in $\mathbb{R}^{3}-\mathbb{B}$. A
self-adjointness analysis with $\partial\mathbb{D}$ and $\partial\mathbb{B}$ as
the boundary for the two cases shows that a general class of boundary
conditions for which the Hamiltonian op... | [
{
"created": "Thu, 24 Feb 2011 07:38:19 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Apr 2011 17:40:10 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Jun 2011 05:21:24 GMT",
"version": "v3"
}
] | 2013-05-29 | [
[
"Govindarajan",
"T. R.",
""
],
[
"Tibrewala",
"Rakesh",
""
]
] | We solve for the spectrum of the Laplacian as a Hamiltonian on $\mathbb{R}^{2}-\mathbb{D}$ and in $\mathbb{R}^{3}-\mathbb{B}$. A self-adjointness analysis with $\partial\mathbb{D}$ and $\partial\mathbb{B}$ as the boundary for the two cases shows that a general class of boundary conditions for which the Hamiltonian oper... |
gr-qc/9410044 | Wai Suen | E.S.C. Ching, P.T. Leung, W.M. Suen and K. Young | Late Time Tail of Wave Propagation on Curved Spacetime | 11 pages, WUGRAV-94-12 | Phys.Rev.Lett. 74 (1995) 2414-2417 | 10.1103/PhysRevLett.74.2414 | null | gr-qc | null | The late time behavior of waves propagating on a general curved spacetime is
studied. The late time tail is not necessarily an inverse power of time. Our
work extends, places in context, and provides understanding for the known
results for the Schwarzschild spacetime. Analytic and numerical results are in
excellent a... | [
{
"created": "Sun, 30 Oct 1994 00:44:59 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Ching",
"E. S. C.",
""
],
[
"Leung",
"P. T.",
""
],
[
"Suen",
"W. M.",
""
],
[
"Young",
"K.",
""
]
] | The late time behavior of waves propagating on a general curved spacetime is studied. The late time tail is not necessarily an inverse power of time. Our work extends, places in context, and provides understanding for the known results for the Schwarzschild spacetime. Analytic and numerical results are in excellent agr... |
gr-qc/9904047 | Marco Cavagli\`a | Marco Cavaglia (AEI Potsdam) | The Birkhoff theorem for topologically massive gravity | 7 pages, no figures, LaTeX | Grav.Cosmol. 5 (1999) 101-103 | null | null | gr-qc | null | We derive the general $\Sigma_2\times S$ solution of topologically massive
gravity in vacuum and in presence of a cosmological constant. The field
equations reduce to three-dimensional Einstein equations and the solution has
constant Ricci tensor. We briefly discuss the emergence of non-Ricci flat
solutions when spin... | [
{
"created": "Mon, 19 Apr 1999 15:58:10 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cavaglia",
"Marco",
"",
"AEI Potsdam"
]
] | We derive the general $\Sigma_2\times S$ solution of topologically massive gravity in vacuum and in presence of a cosmological constant. The field equations reduce to three-dimensional Einstein equations and the solution has constant Ricci tensor. We briefly discuss the emergence of non-Ricci flat solutions when spin i... |
1506.07809 | Sourav Bhattacharya | Sourav Bhattacharya | A note on entropy of de Sitter black holes | v2, 16pp; added references and discussions, results unchanged | Eur. Phys. J. C (2016) 76:112 | 10.1140/epjc/s10052-016-3955-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A de Sitter black hole or a black hole spacetime endowed with a positive
cosmological constant has two Killing horizons -- a black hole and a
cosmological event horizon surrounding it. It is natural to expect that the
total Bekenstein-Hawking entropy of such spacetimes should be the sum of the
two horizons' areas. In... | [
{
"created": "Thu, 25 Jun 2015 16:33:55 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Mar 2016 04:47:27 GMT",
"version": "v2"
}
] | 2016-03-08 | [
[
"Bhattacharya",
"Sourav",
""
]
] | A de Sitter black hole or a black hole spacetime endowed with a positive cosmological constant has two Killing horizons -- a black hole and a cosmological event horizon surrounding it. It is natural to expect that the total Bekenstein-Hawking entropy of such spacetimes should be the sum of the two horizons' areas. In t... |
1007.1561 | Christodoulakis Theodosios | Petros A. Terzis, T. Christodoulakis | Lie algebra automorphisms as Lie point symmetries and the solution space
for Bianchi Type I, II, IV, V vacuum geometries | LaTeX source file, 37 pages, no figures. Accepted to CQG. arXiv admin
note: substantial text overlap with arXiv:0803.3710, arXiv:gr-qc/0410123 | Class. Quantum Grav. (2012) 29 235007 | 10.1088/0264-9381/29/23/235007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Lie group symmetry analysis for systems of coupled, nonlinear ordinary
differential equations is performed in order to obtain the entire solution
space to Einstein's field equations for vacuum Bianchi spacetime geometries.
The symmetries used are the automorphisms of the Lie algebra of the
corresponding three-dimensi... | [
{
"created": "Fri, 9 Jul 2010 11:21:31 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Oct 2012 10:37:12 GMT",
"version": "v2"
}
] | 2013-11-20 | [
[
"Terzis",
"Petros A.",
""
],
[
"Christodoulakis",
"T.",
""
]
] | Lie group symmetry analysis for systems of coupled, nonlinear ordinary differential equations is performed in order to obtain the entire solution space to Einstein's field equations for vacuum Bianchi spacetime geometries. The symmetries used are the automorphisms of the Lie algebra of the corresponding three-dimension... |
1911.09745 | Chiara Mingarelli | Chiara M. F. Mingarelli, Stephen R. Taylor, B. S. Sathyaprakash, Will
M. Farr | Understanding $\Omega_\mathrm{gw}(f)$ in Gravitational Wave Experiments | 9 pages, 1 figure | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we provide a comprehensive derivation of the energy density in
the stochastic gravitational-wave background $\Omega_\mathrm{gw}(f)$, and show
how this quantity is measured in ground-based detectors such as Laser
Interferometer Gravitational-Wave Observatory (LIGO), space-based Laser
Interferometer Space... | [
{
"created": "Thu, 21 Nov 2019 20:58:08 GMT",
"version": "v1"
}
] | 2019-11-25 | [
[
"Mingarelli",
"Chiara M. F.",
""
],
[
"Taylor",
"Stephen R.",
""
],
[
"Sathyaprakash",
"B. S.",
""
],
[
"Farr",
"Will M.",
""
]
] | In this paper we provide a comprehensive derivation of the energy density in the stochastic gravitational-wave background $\Omega_\mathrm{gw}(f)$, and show how this quantity is measured in ground-based detectors such as Laser Interferometer Gravitational-Wave Observatory (LIGO), space-based Laser Interferometer Space A... |
2107.12822 | Andrew Melatos | A. Melatos, P. Clearwater, S. Suvorova, L. Sun, W. Moran, R. J. Evans | Hidden Markov model tracking of continuous gravitational waves from a
neutron star with wandering spin. III. Rotational phase tracking | 33 pages, 16 figures, accepted for publication in Physical Review D | null | 10.1103/PhysRevD.104.042003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A hidden Markov model (HMM) solved recursively by the Viterbi algorithm can
be configured to search for persistent, quasimonochromatic gravitational
radiation from an isolated or accreting neutron star, whose rotational
frequency is unknown and wanders stochastically. Here an existing HMM analysis
pipeline is general... | [
{
"created": "Tue, 27 Jul 2021 13:42:41 GMT",
"version": "v1"
}
] | 2021-09-01 | [
[
"Melatos",
"A.",
""
],
[
"Clearwater",
"P.",
""
],
[
"Suvorova",
"S.",
""
],
[
"Sun",
"L.",
""
],
[
"Moran",
"W.",
""
],
[
"Evans",
"R. J.",
""
]
] | A hidden Markov model (HMM) solved recursively by the Viterbi algorithm can be configured to search for persistent, quasimonochromatic gravitational radiation from an isolated or accreting neutron star, whose rotational frequency is unknown and wanders stochastically. Here an existing HMM analysis pipeline is generaliz... |
2309.05106 | Adriano Rocha Soares | A. R. Soares, C. F. S. Pereira, R. L. L. Vit\'oria | Holonomy corrected Schwarzschild black hole lensing | null | null | 10.1103/PhysRevD.108.124024 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the present work, we theoretically investigate gravitational lensing in
the spacetime of a holonomy corrected Schwarzschild black hole. Analytical
expressions for the light deflection angle are obtained in both the weak field
limit and the strong field limit. Furthermore, we analyze observables, such as
relativist... | [
{
"created": "Sun, 10 Sep 2023 18:28:12 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Nov 2023 23:12:55 GMT",
"version": "v2"
}
] | 2024-08-07 | [
[
"Soares",
"A. R.",
""
],
[
"Pereira",
"C. F. S.",
""
],
[
"Vitória",
"R. L. L.",
""
]
] | In the present work, we theoretically investigate gravitational lensing in the spacetime of a holonomy corrected Schwarzschild black hole. Analytical expressions for the light deflection angle are obtained in both the weak field limit and the strong field limit. Furthermore, we analyze observables, such as relativistic... |
gr-qc/0612183 | Elcio Abdalla | Elcio Abdalla and Davi Giugno | Shedding Some New Lights upon the Stellar Quasi-Normal Modes | 30 pages, figures included | null | null | null | gr-qc | null | In the current paper we present some new data on the issue of quasi-normal
modes (QNMs) of uniform, neutron and quark stars. These questions have already
been addressed in the literature before, but we have found some interesting
features that have not been discussed so far. We have increased the range of
frequency v... | [
{
"created": "Fri, 29 Dec 2006 13:38:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Abdalla",
"Elcio",
""
],
[
"Giugno",
"Davi",
""
]
] | In the current paper we present some new data on the issue of quasi-normal modes (QNMs) of uniform, neutron and quark stars. These questions have already been addressed in the literature before, but we have found some interesting features that have not been discussed so far. We have increased the range of frequency val... |
1801.03272 | Md. Wali Hossain | Md. Wali Hossain | Quintessential inflation: A unified scenario of inflation and dark
energy | 5 pages, 5 figures, Based on the talk given at the Joint
International Conference of ICGAC-XIII and IK-15 on Gravitation, Astrophysics
and Cosmology held at Ewha Womans University, Seoul, Korea (July 3-7, 2017),
Published in EPJ Web of Conferences | EPJ Web of Conferences 168, 04007 (2018) | 10.1051/epjconf/201816804007 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quintessential inflation unifies inflation and late time acceleration by a
single scalar field. Such a scenario, with canonical and non-canonical scalar
fields, has been discussed . The scalar field behaves as an inflaton field
during inflation and as a quintessence field during late time. Also the
predictions of the... | [
{
"created": "Wed, 10 Jan 2018 08:46:21 GMT",
"version": "v1"
}
] | 2018-01-11 | [
[
"Hossain",
"Md. Wali",
""
]
] | Quintessential inflation unifies inflation and late time acceleration by a single scalar field. Such a scenario, with canonical and non-canonical scalar fields, has been discussed . The scalar field behaves as an inflaton field during inflation and as a quintessence field during late time. Also the predictions of the m... |
1212.5772 | Kourosh Nozari | Kourosh Nozari, A. Behboodi and S. Akhshabi | Braneworld Teleparallel Gravity | 7 pages, no figure | Phys. Lett. B, 723, 201 (2013) | 10.1016/j.physletb.2013.04.058 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the gravity in the context of a braneworld teleparallel scenario.
The geometrical setup is assumed to be Randall-Sundrum II model where a single
positive tension brane is embedded in an infinite AdS bulk. We derive the
equivalent of Gauss-Codacci equations in teleparallel gravity and junction
conditions in t... | [
{
"created": "Sun, 23 Dec 2012 08:54:47 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Nozari",
"Kourosh",
""
],
[
"Behboodi",
"A.",
""
],
[
"Akhshabi",
"S.",
""
]
] | We study the gravity in the context of a braneworld teleparallel scenario. The geometrical setup is assumed to be Randall-Sundrum II model where a single positive tension brane is embedded in an infinite AdS bulk. We derive the equivalent of Gauss-Codacci equations in teleparallel gravity and junction conditions in thi... |
2108.13026 | Yohsuke Takamori | Yohsuke Takamori, Atsushi Naruko, Yusuke Sakurai, Keitaro Takahashi,
Daisuke Yamauchi, Chul-Moon Yoo | Testing the Non-circularity of the Spacetime around Sagittarius A* with
Orbiting Pulsars | 14 pages, 9 figures, 2 tables, accepted for publication in PASJ,
replaced with the accepted manuscript | null | 10.1093/pasj/psac003 | YITP-21-48 | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A disformal Kerr black hole solution is a rotating black hole solution in a
modified gravity theory which breaks the circular condition of spacetime
differently from the case of the Kerr spacetime. In this paper, assuming that
Sagittarius A* (Sgr A*) is a disformal Kerr black hole, we examine the
potential to test th... | [
{
"created": "Mon, 30 Aug 2021 07:28:32 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jan 2022 02:04:11 GMT",
"version": "v2"
}
] | 2022-03-14 | [
[
"Takamori",
"Yohsuke",
""
],
[
"Naruko",
"Atsushi",
""
],
[
"Sakurai",
"Yusuke",
""
],
[
"Takahashi",
"Keitaro",
""
],
[
"Yamauchi",
"Daisuke",
""
],
[
"Yoo",
"Chul-Moon",
""
]
] | A disformal Kerr black hole solution is a rotating black hole solution in a modified gravity theory which breaks the circular condition of spacetime differently from the case of the Kerr spacetime. In this paper, assuming that Sagittarius A* (Sgr A*) is a disformal Kerr black hole, we examine the potential to test the ... |
gr-qc/0505016 | Robin Zegers | Robin Zegers | Birkhoff's theorem in Lovelock gravity | 5 pages | J.Math.Phys.46:072502,2005 | 10.1063/1.1960798 | LPT 05-30 | gr-qc hep-th | null | We show that the generic solutions of the Lovelock equations with spherical,
planar or hyperbolic symmetry are locally isometric to the corresponding static
Lovelock black hole. As a consequence, these solutions are locally static: they
admit an additional Killing vector that can either be space-like or time-like,
de... | [
{
"created": "Tue, 3 May 2005 08:59:14 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Zegers",
"Robin",
""
]
] | We show that the generic solutions of the Lovelock equations with spherical, planar or hyperbolic symmetry are locally isometric to the corresponding static Lovelock black hole. As a consequence, these solutions are locally static: they admit an additional Killing vector that can either be space-like or time-like, depe... |
0908.3113 | S Habib Mazharimousavi | S. Habib Mazharimousavi, M. Halilsoy, I. Sakalli and O. Gurtug | Dilatonic interpolation between Reissner-Nordstrom and Bertotti-Robinson
spacetimes with physical consequences | 27 pages, 4 figures, to appear in CQG. | Class.Quant.Grav.27:105005,2010 | 10.1088/0264-9381/27/10/105005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a general class of static, spherically symmetric, non-asymptotically
flat and asymptotically non-(anti) de Sitter black hole solutions in
Einstein-Maxwell-Dilaton (EMD) theory of gravity in 4-dimensions. In this
general study we couple a magnetic Maxwell field with a general dilaton
potential, while double Li... | [
{
"created": "Fri, 21 Aug 2009 12:47:15 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Mar 2010 12:00:55 GMT",
"version": "v2"
}
] | 2010-04-22 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
],
[
"Sakalli",
"I.",
""
],
[
"Gurtug",
"O.",
""
]
] | We give a general class of static, spherically symmetric, non-asymptotically flat and asymptotically non-(anti) de Sitter black hole solutions in Einstein-Maxwell-Dilaton (EMD) theory of gravity in 4-dimensions. In this general study we couple a magnetic Maxwell field with a general dilaton potential, while double Liou... |
1803.00585 | Kentaro Komori | Kentaro Komori, Yutaro Enomoto, Hiroki Takeda, Yuta Michimura, Kentaro
Somiya, Masaki Ando, Stefan W. Ballmer | A Direct Approach for the Fluctuation-Dissipation Theorem under
Non-Equilibrium Steady-State Conditions | 8 pages, 6 figures | Phys. Rev. D 97, 102001 (2018) | 10.1103/PhysRevD.97.102001 | null | gr-qc physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The test mass suspensions of cryogenic gravitational-wave detectors such as
the KAGRA project are tasked with extracting the heat deposited on the optics.
Thus these suspensions have a non-uniform temperature, requiring the
calculation of thermal noise in non-equilibrium conditions. While it is not
possible to descri... | [
{
"created": "Thu, 1 Mar 2018 19:03:05 GMT",
"version": "v1"
}
] | 2018-05-09 | [
[
"Komori",
"Kentaro",
""
],
[
"Enomoto",
"Yutaro",
""
],
[
"Takeda",
"Hiroki",
""
],
[
"Michimura",
"Yuta",
""
],
[
"Somiya",
"Kentaro",
""
],
[
"Ando",
"Masaki",
""
],
[
"Ballmer",
"Stefan W.",
""
]
] | The test mass suspensions of cryogenic gravitational-wave detectors such as the KAGRA project are tasked with extracting the heat deposited on the optics. Thus these suspensions have a non-uniform temperature, requiring the calculation of thermal noise in non-equilibrium conditions. While it is not possible to describe... |
1709.08942 | Georgios Lukes Gerakopoulos | Georgios Lukes-Gerakopoulos | Time parameterizations and spin supplementary conditions of the
Mathisson-Papapetrou-Dixon equations | 7 pages, 3 figures | Phys. Rev. D 96, 104023 (2017) | 10.1103/PhysRevD.96.104023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The implications of two different time constraints on the
Mathisson-Papapetrou-Dixon (MPD) equations are discussed under three spin
supplementary conditions (SSC). For this reason the MPD equations are revisited
without specifying the affine parameter and several relations are reintroduced
in their general form. The ... | [
{
"created": "Tue, 26 Sep 2017 11:12:29 GMT",
"version": "v1"
}
] | 2017-11-17 | [
[
"Lukes-Gerakopoulos",
"Georgios",
""
]
] | The implications of two different time constraints on the Mathisson-Papapetrou-Dixon (MPD) equations are discussed under three spin supplementary conditions (SSC). For this reason the MPD equations are revisited without specifying the affine parameter and several relations are reintroduced in their general form. The la... |
1411.4689 | Roland Steinbauer | Michael Kunzinger, Roland Steinbauer, Milena Stojkovic, James A.
Vickers | Hawking's singularity theorem for $C^{1,1}$-metrics | 19 pages, LaTeX; v2: corrected Lemma 4.2; v3: typos corrected, final
version | Classical Quantum Gravity 32 (2015), no. 7, 075012, 19 pp | 10.1088/0264-9381/32/7/075012 | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a detailed proof of Hawking's singularity theorem in the
regularity class $C^{1,1}$, i.e., for spacetime metrics possessing locally
Lipschitz continuous first derivatives. The proof uses recent results in
$C^{1,1}$-causality theory and is based on regularisation techniques adapted to
the causal structure.
| [
{
"created": "Mon, 17 Nov 2014 22:46:42 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Jan 2015 12:38:27 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Mar 2015 11:39:14 GMT",
"version": "v3"
}
] | 2016-09-15 | [
[
"Kunzinger",
"Michael",
""
],
[
"Steinbauer",
"Roland",
""
],
[
"Stojkovic",
"Milena",
""
],
[
"Vickers",
"James A.",
""
]
] | We provide a detailed proof of Hawking's singularity theorem in the regularity class $C^{1,1}$, i.e., for spacetime metrics possessing locally Lipschitz continuous first derivatives. The proof uses recent results in $C^{1,1}$-causality theory and is based on regularisation techniques adapted to the causal structure. |
2002.01745 | Anton Sheykin | A. A. Sheykin, D. P. Solovyev, V. V. Sukhanov, S. A. Paston | Modifications of gravity via differential transformations of field
variables | 18 pages | Symmetry 2020, 12(2), 240 | 10.3390/sym12020240 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss field theories appearing as a result of applying field
transformations with derivatives (differential field transformations, DFT) to a
known theory. We begin with some simple examples of DFTs to see the basic
properties of the procedure. In this process the dynamics of the theory might
either change or con... | [
{
"created": "Wed, 5 Feb 2020 12:09:58 GMT",
"version": "v1"
}
] | 2020-02-06 | [
[
"Sheykin",
"A. A.",
""
],
[
"Solovyev",
"D. P.",
""
],
[
"Sukhanov",
"V. V.",
""
],
[
"Paston",
"S. A.",
""
]
] | We discuss field theories appearing as a result of applying field transformations with derivatives (differential field transformations, DFT) to a known theory. We begin with some simple examples of DFTs to see the basic properties of the procedure. In this process the dynamics of the theory might either change or conse... |
0909.1267 | Francisco Lobo | Tiberiu Harko, Zolt\'an Kov\'acs, Francisco S. N. Lobo | Thin accretion disk signatures in dynamical Chern-Simons modified
gravity | 12 pages, 24 figures. V2: 10 pages, 13 figures, significant changes,
matches published version | Class.Quant.Grav.27:105010,2010 | 10.1088/0264-9381/27/10/105010 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A promising extension of general relativity is Chern-Simons (CS) modified
gravity, in which the Einstein-Hilbert action is modified by adding a
parity-violating CS term, which couples to gravity via a scalar field. In this
work, we consider the interesting, yet relatively unexplored, dynamical
formulation of CS modif... | [
{
"created": "Mon, 7 Sep 2009 15:00:32 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Apr 2010 21:58:37 GMT",
"version": "v2"
}
] | 2010-04-23 | [
[
"Harko",
"Tiberiu",
""
],
[
"Kovács",
"Zoltán",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | A promising extension of general relativity is Chern-Simons (CS) modified gravity, in which the Einstein-Hilbert action is modified by adding a parity-violating CS term, which couples to gravity via a scalar field. In this work, we consider the interesting, yet relatively unexplored, dynamical formulation of CS modifie... |
gr-qc/0301117 | Dr G. A. Jaroszkiewicz | Jon Eakins and George Jaroszkiewicz | The origin of causal set structure in the quantum universe | Updated version with four new figures | null | null | null | gr-qc quant-ph | null | We discuss the origin of causal set structure and the emergence of classical
space and time in the universe. Given that the universe is a closed
self-referential quantum automaton with a quantum register consisting of a vast
number of elementary quantum subregisters, we find two distinct but intimately
related causal... | [
{
"created": "Tue, 28 Jan 2003 17:22:05 GMT",
"version": "v1"
},
{
"created": "Sat, 13 Dec 2003 17:27:58 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Eakins",
"Jon",
""
],
[
"Jaroszkiewicz",
"George",
""
]
] | We discuss the origin of causal set structure and the emergence of classical space and time in the universe. Given that the universe is a closed self-referential quantum automaton with a quantum register consisting of a vast number of elementary quantum subregisters, we find two distinct but intimately related causal s... |
1312.6929 | Kirill Bronnikov | K.A. Bronnikov, L.N. Lipatova, I.D. Novikov, A.A. Shatskiy | Example of a stable wormhole in general relativity | 6 pages, no figures | Grav. Cosmol. 19 (4), 269-274 (2013) | 10.1134/S0202289313040038 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a static, spherically symmetric wormhole model whose metric
coincides with that of the so-called Ellis wormhole but the material source of
gravity consists of a perfect fluid with negative density and a source-free
radial electric or magnetic field. For a certain class of fluid equations of
state, it has bee... | [
{
"created": "Wed, 25 Dec 2013 06:16:24 GMT",
"version": "v1"
}
] | 2013-12-30 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Lipatova",
"L. N.",
""
],
[
"Novikov",
"I. D.",
""
],
[
"Shatskiy",
"A. A.",
""
]
] | We study a static, spherically symmetric wormhole model whose metric coincides with that of the so-called Ellis wormhole but the material source of gravity consists of a perfect fluid with negative density and a source-free radial electric or magnetic field. For a certain class of fluid equations of state, it has been ... |
1303.4752 | Norbert Bodendorfer | Norbert Bodendorfer, Yasha Neiman | Imaginary action, spinfoam asymptotics and the 'transplanckian' regime
of loop quantum gravity | 23 pages, 5 figures; v2: journal version, section 3 rewritten, minor
clarifications | Class. Quantum Grav. 30 (2013) 195018 | 10.1088/0264-9381/30/19/195018 | IGC-13/3-2 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was recently noted that the on-shell Einstein-Hilbert action with
York-Gibbons-Hawking boundary term has an imaginary part, proportional to the
area of the codimension-2 surfaces on which the boundary normal becomes null.
We discuss the extension of this result to first-order formulations of gravity.
As a side eff... | [
{
"created": "Tue, 19 Mar 2013 20:16:26 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Sep 2013 12:40:12 GMT",
"version": "v2"
}
] | 2013-09-13 | [
[
"Bodendorfer",
"Norbert",
""
],
[
"Neiman",
"Yasha",
""
]
] | It was recently noted that the on-shell Einstein-Hilbert action with York-Gibbons-Hawking boundary term has an imaginary part, proportional to the area of the codimension-2 surfaces on which the boundary normal becomes null. We discuss the extension of this result to first-order formulations of gravity. As a side effec... |
1101.4382 | Luis Cort\'es Barbado | Luis C. Barbado, Carlos Barcel\'o and Luis J. Garay | Hawking radiation as perceived by different observers | 33 pages, 18 figures | Class.Quant.Grav.28:125021,2011 | 10.1088/0264-9381/28/12/125021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use a method recently introduced in Barcel\'o et al (2011 Phys. Rev. D 83
41501), to analyse Hawking radiation in a Schwarzschild black hole as perceived
by different observers in the system. The method is based on the introduction
of an 'effective temperature' function that varies with time. First we
introduce a ... | [
{
"created": "Sun, 23 Jan 2011 16:22:53 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jul 2011 07:54:52 GMT",
"version": "v2"
}
] | 2015-03-17 | [
[
"Barbado",
"Luis C.",
""
],
[
"Barceló",
"Carlos",
""
],
[
"Garay",
"Luis J.",
""
]
] | We use a method recently introduced in Barcel\'o et al (2011 Phys. Rev. D 83 41501), to analyse Hawking radiation in a Schwarzschild black hole as perceived by different observers in the system. The method is based on the introduction of an 'effective temperature' function that varies with time. First we introduce a no... |
1106.3278 | Alexandre Le Tiec | Alexandre Le Tiec, Abdul H. Mrou\'e, Leor Barack, Alessandra Buonanno,
Harald P. Pfeiffer, Norichika Sago, Andrea Taracchini | Periastron Advance in Black-Hole Binaries | 5 pages, 3 figures; v2: new abstract, updated figures correcting
minor error, added references, minor changes to match published version; to
appear in Phys. Rev. Lett | Phys.Rev.Lett.107:141101,2011 | 10.1103/PhysRevLett.107.141101 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The general relativistic (Mercury-type) periastron advance is calculated here
for the first time with exquisite precision in full general relativity. We use
accurate numerical relativity simulations of spinless black hole binaries with
mass ratios 1/8 < m1/m2 < 1 and compare with the predictions of several
analytic a... | [
{
"created": "Thu, 16 Jun 2011 17:04:14 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Sep 2011 19:30:14 GMT",
"version": "v2"
}
] | 2013-08-26 | [
[
"Tiec",
"Alexandre Le",
""
],
[
"Mroué",
"Abdul H.",
""
],
[
"Barack",
"Leor",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Sago",
"Norichika",
""
],
[
"Taracchini",
"Andrea",
... | The general relativistic (Mercury-type) periastron advance is calculated here for the first time with exquisite precision in full general relativity. We use accurate numerical relativity simulations of spinless black hole binaries with mass ratios 1/8 < m1/m2 < 1 and compare with the predictions of several analytic app... |
gr-qc/9705034 | Serge Droz | Serge Droz and Eric Poisson | Gravitational waves from inspiraling compact binaries: Second
post-Newtonian waveforms as search templates | LaTeX, one eps figure. Hires and color versions are available from
http://jovian.physics.uoguelph.ca/~droz/uni/papers/search.html | Phys.Rev.D56:4449-4454,1997 | 10.1103/PhysRevD.56.4449 | null | gr-qc | null | We ascertain the effectiveness of the second post-Newtonian approximation to
the gravitational waves emitted during the adiabatic inspiral of a compact
binary system as templates for signal searches with kilometer-scale
interferometric detectors. The reference signal is obtained by solving the
Teukolsky equation for ... | [
{
"created": "Tue, 13 May 1997 21:05:45 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Droz",
"Serge",
""
],
[
"Poisson",
"Eric",
""
]
] | We ascertain the effectiveness of the second post-Newtonian approximation to the gravitational waves emitted during the adiabatic inspiral of a compact binary system as templates for signal searches with kilometer-scale interferometric detectors. The reference signal is obtained by solving the Teukolsky equation for a ... |
2111.14794 | Thanasis Giannakopoulos | Thanasis Giannakopoulos, Nigel T. Bishop, David Hilditch, Denis
Pollney, Miguel Zilhao | Gauge structure of the Einstein field equations in Bondi-like
coordinates | 23 pages, 3 figures, ancillary files, data and more supplemental
material at 10.5281/zenodo.5618007, updated to match published version | Phys. Rev. D 105, 084055 (2022) | 10.1103/PhysRevD.105.084055 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The characteristic initial (boundary) value problem has numerous applications
in general relativity (GR) involving numerical studies, and is often formulated
using Bondi-like coordinates. Recently it was shown that several prototype
formulations of this type are only weakly hyperbolic. Presently we examine the
root c... | [
{
"created": "Mon, 29 Nov 2021 18:48:01 GMT",
"version": "v1"
},
{
"created": "Mon, 2 May 2022 10:16:12 GMT",
"version": "v2"
}
] | 2022-05-03 | [
[
"Giannakopoulos",
"Thanasis",
""
],
[
"Bishop",
"Nigel T.",
""
],
[
"Hilditch",
"David",
""
],
[
"Pollney",
"Denis",
""
],
[
"Zilhao",
"Miguel",
""
]
] | The characteristic initial (boundary) value problem has numerous applications in general relativity (GR) involving numerical studies, and is often formulated using Bondi-like coordinates. Recently it was shown that several prototype formulations of this type are only weakly hyperbolic. Presently we examine the root cau... |
gr-qc/9809075 | Rainer Kuehne | R. W. Kuhne | Remark on ``Indication, from Pioneer 10/11, Galileo, and Ulysses Data,
of an Apparent Anomalous, Weak, Long-Range Acceleration'' | 1 page, no figures, Revtex | null | null | null | gr-qc | null | Recently, Anderson et al. presented possible evidence for an anomalous
acceleration acting on spacecrafts. Furthermore, the motions of several planets
and comets are known to experience unexplained disturbances. A transneptunian
comet or asteroid belt might be the common origin of these anomalies.
| [
{
"created": "Mon, 28 Sep 1998 07:20:01 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kuhne",
"R. W.",
""
]
] | Recently, Anderson et al. presented possible evidence for an anomalous acceleration acting on spacecrafts. Furthermore, the motions of several planets and comets are known to experience unexplained disturbances. A transneptunian comet or asteroid belt might be the common origin of these anomalies. |
0811.1178 | Petros Wallden Dr | David Rideout and Petros Wallden | Emergent Continuum Spacetime from a Random, Discrete, Partial Order | 8 pages, 2 figures, based on talk by P. Wallden at the NEB XIII
conference | J.Phys.Conf.Ser.189:012045,2009 | 10.1088/1742-6596/189/1/012045 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are several indications (from different approaches) that Spacetime at
the Plank Scale could be discrete. One approach to Quantum Gravity that takes
this most seriously is the Causal Sets Approach. In this approach spacetime is
fundamentally a discrete, random, partially ordered set (where the partial
order is t... | [
{
"created": "Fri, 7 Nov 2008 17:04:53 GMT",
"version": "v1"
}
] | 2009-11-05 | [
[
"Rideout",
"David",
""
],
[
"Wallden",
"Petros",
""
]
] | There are several indications (from different approaches) that Spacetime at the Plank Scale could be discrete. One approach to Quantum Gravity that takes this most seriously is the Causal Sets Approach. In this approach spacetime is fundamentally a discrete, random, partially ordered set (where the partial order is the... |
gr-qc/0311054 | Tomas Liko | Tomas Liko, James M. Overduin, Paul S. Wesson | Astrophysical Implications of Higher-Dimensional Gravity | 23 pages, 2 figures; to appear in Space Science Reviews; v3: typos
corrected and minor changes to text, expanded derivation of fundamental mode
added | Space Sci.Rev.110:337-357,2004 | 10.1023/B:SPAC.0000023441.20373.6d | null | gr-qc | null | We review the implications of modern higher-dimensional theories of gravity
for astrophysics and cosmology. In particular, we discuss the latest
developments of space-time-matter theory in connection with dark matter,
particle dynamics and the cosmological constant, as well as related aspects of
quantum theory. There... | [
{
"created": "Mon, 17 Nov 2003 19:32:30 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Nov 2003 21:39:08 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Apr 2005 02:20:55 GMT",
"version": "v3"
}
] | 2011-07-19 | [
[
"Liko",
"Tomas",
""
],
[
"Overduin",
"James M.",
""
],
[
"Wesson",
"Paul S.",
""
]
] | We review the implications of modern higher-dimensional theories of gravity for astrophysics and cosmology. In particular, we discuss the latest developments of space-time-matter theory in connection with dark matter, particle dynamics and the cosmological constant, as well as related aspects of quantum theory. There a... |
2010.00986 | Emmanuil Saridakis | John D. Barrow, Spyros Basilakos, Emmanuel N. Saridakis | Big Bang Nucleosynthesis constraints on Barrow entropy | 6 pages, 1 figure | Phys.Lett.B 815 (2021) 136134 | 10.1016/j.physletb.2021.136134 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use Big Bang Nucleosynthesis (BBN) data in order to impose constraints on
the exponent of Barrow entropy. The latter is an extended entropy relation
arising from the incorporation of quantum-gravitational effects on the
black-hole structure, parameterized effectively by the new parameter $\Delta$.
When considered ... | [
{
"created": "Fri, 2 Oct 2020 13:31:20 GMT",
"version": "v1"
}
] | 2021-02-19 | [
[
"Barrow",
"John D.",
""
],
[
"Basilakos",
"Spyros",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | We use Big Bang Nucleosynthesis (BBN) data in order to impose constraints on the exponent of Barrow entropy. The latter is an extended entropy relation arising from the incorporation of quantum-gravitational effects on the black-hole structure, parameterized effectively by the new parameter $\Delta$. When considered in... |
1411.1935 | Golam Mortuza Hossain | Golam Mortuza Hossain and Gopal Sardar | Absence of Unruh effect in polymer quantization | 6 pages, 1 figure; v2 with improved discussions and notation; several
new references added; published in CQG with a slightly different title but
the same results | Class.Quant.Grav.33:245016,2016 | 10.1088/0264-9381/33/24/245016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Unruh effect is a landmark prediction of standard quantum field theory in
which Fock vacuum state appears as a thermal state with respect to an uniformly
accelerating observer. Given its dependence on trans-Planckian modes, Unruh
effect is often considered as an arena for exploring a candidate theory of
quantum gravi... | [
{
"created": "Fri, 7 Nov 2014 14:38:47 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Dec 2016 05:39:21 GMT",
"version": "v2"
}
] | 2016-12-07 | [
[
"Hossain",
"Golam Mortuza",
""
],
[
"Sardar",
"Gopal",
""
]
] | Unruh effect is a landmark prediction of standard quantum field theory in which Fock vacuum state appears as a thermal state with respect to an uniformly accelerating observer. Given its dependence on trans-Planckian modes, Unruh effect is often considered as an arena for exploring a candidate theory of quantum gravity... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.