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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2109.00986 | Pierre Martin-Dussaud | Eugenio Bianchi and Pierre Martin-Dussaud | Causal structure in spin-foams | null | null | null | null | gr-qc math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The metric field of general relativity is almost fully determined by its
causal structure. Yet, in spin-foam models for quantum gravity, the role played
by the causal structure is still largely unexplored. The goal of this paper is
to clarify how causality is encoded in such models. The quest unveils the
physical mea... | [
{
"created": "Thu, 2 Sep 2021 14:37:42 GMT",
"version": "v1"
}
] | 2021-09-03 | [
[
"Bianchi",
"Eugenio",
""
],
[
"Martin-Dussaud",
"Pierre",
""
]
] | The metric field of general relativity is almost fully determined by its causal structure. Yet, in spin-foam models for quantum gravity, the role played by the causal structure is still largely unexplored. The goal of this paper is to clarify how causality is encoded in such models. The quest unveils the physical meani... |
2312.13587 | Tanmoy Paul | Sergei D. Odintsov, Simone D'Onofrio, Tanmoy Paul | Entropic Inflation in Presence of Scalar Field | Invited article in the Special Issue "The Friedmann Cosmology: A
Century Later". (Accepted by "Universe") | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In spirit of the recently proposed four-parameter generalized entropy of
apparent horizon, we investigate inflationary cosmology where the matter field
inside of the horizon is dominated by a scalar field with a power law potential
(i.e., the form of $\phi^n$ where $\phi$ is the scalar field under
consideration). Act... | [
{
"created": "Thu, 21 Dec 2023 05:34:58 GMT",
"version": "v1"
}
] | 2023-12-22 | [
[
"Odintsov",
"Sergei D.",
""
],
[
"D'Onofrio",
"Simone",
""
],
[
"Paul",
"Tanmoy",
""
]
] | In spirit of the recently proposed four-parameter generalized entropy of apparent horizon, we investigate inflationary cosmology where the matter field inside of the horizon is dominated by a scalar field with a power law potential (i.e., the form of $\phi^n$ where $\phi$ is the scalar field under consideration). Actua... |
1007.0319 | Xin Li | Xin Li and Zhe Chang | Possible quantum gravity effects on the gravitational deflection of
light | null | Phys.Rev.D82:124009,2010 | 10.1103/PhysRevD.82.124009 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | We investigate possible quantum gravity (QG) effects on the gravitational
deflection of light. Two forms of deformation of the Schwarzschild spacetime
are proposed. The first ansatz is a given Finslerian line element, it could be
regarded as a weak QG effect on the Schwarzschild spacetime. Starting from this
ansatz, ... | [
{
"created": "Fri, 2 Jul 2010 09:01:53 GMT",
"version": "v1"
}
] | 2010-12-24 | [
[
"Li",
"Xin",
""
],
[
"Chang",
"Zhe",
""
]
] | We investigate possible quantum gravity (QG) effects on the gravitational deflection of light. Two forms of deformation of the Schwarzschild spacetime are proposed. The first ansatz is a given Finslerian line element, it could be regarded as a weak QG effect on the Schwarzschild spacetime. Starting from this ansatz, we... |
gr-qc/0212088 | Massimo Giovannini | Massimo Giovannini (CERN, Theory Division) | Primordial Magnetic Fields and Stochastic GW Backgrounds | 15 pages; Lecture delivered at the ``15 th SIGRAV Conference on
General Relativity and Gravitational Physics", Villa Mondragone (Rome)
September 2002; to appear in the Proccedings IOP Conference Series | null | null | CERN-TH/2002-374 | gr-qc hep-ph | null | Operating resonant mass detectors set interesting bounds on diffused
backgrounds of gravitational radiation and in the next five years the wide-band
interferometers will also look for stochastic sources. In this lecture the
interplay among relic GW backgrounds and large scale magnetic fields will be
discussed. Magnet... | [
{
"created": "Fri, 20 Dec 2002 20:59:54 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Dec 2002 13:00:34 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Giovannini",
"Massimo",
"",
"CERN, Theory Division"
]
] | Operating resonant mass detectors set interesting bounds on diffused backgrounds of gravitational radiation and in the next five years the wide-band interferometers will also look for stochastic sources. In this lecture the interplay among relic GW backgrounds and large scale magnetic fields will be discussed. Magnetic... |
2304.14258 | Yu Zhang | Qi-Quan Li, Yu Zhang, Qian Li, Qi Sun | Rotating Bardeen black hole surrounded by perfect fluid dark matter as a
particle accelerator | 10 pages, 7 figures, 2 Tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the event horizon of a rotating Bardeen black hole surrounded by
perfect fluid dark matter and the black hole as a particle accelerator. The
black hole is represented by four parameters: mass $M$, rotation parameter $a$,
dark matter parameter $\alpha$ and magnetic charge $g$. It is interesting that
when we d... | [
{
"created": "Wed, 26 Apr 2023 15:17:01 GMT",
"version": "v1"
},
{
"created": "Sat, 6 May 2023 01:52:37 GMT",
"version": "v2"
}
] | 2023-05-09 | [
[
"Li",
"Qi-Quan",
""
],
[
"Zhang",
"Yu",
""
],
[
"Li",
"Qian",
""
],
[
"Sun",
"Qi",
""
]
] | We study the event horizon of a rotating Bardeen black hole surrounded by perfect fluid dark matter and the black hole as a particle accelerator. The black hole is represented by four parameters: mass $M$, rotation parameter $a$, dark matter parameter $\alpha$ and magnetic charge $g$. It is interesting that when we det... |
0805.4485 | Izzet Sakalli | A.Al-Badawi, I.Sakalli | Solution of the Dirac equation in the rotating Bertotti-Robinson
spacetime | 17 pages, no figure. Appeared in JMP (May, 2008) | J.Math.Phys.49:052501,2008 | 10.1063/1.2912725 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Dirac equation is solved in the rotating Bertotti-Robinson spacetime. The
set of equations representing the Dirac equation in the Newman-Penrose
formalism is decoupled into an axial and angular part. The axial equation,
which is independent of mass, is solved exactly in terms of hypergeometric
functions. The angu... | [
{
"created": "Thu, 29 May 2008 08:59:11 GMT",
"version": "v1"
},
{
"created": "Fri, 30 May 2008 07:17:26 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Al-Badawi",
"A.",
""
],
[
"Sakalli",
"I.",
""
]
] | The Dirac equation is solved in the rotating Bertotti-Robinson spacetime. The set of equations representing the Dirac equation in the Newman-Penrose formalism is decoupled into an axial and angular part. The axial equation, which is independent of mass, is solved exactly in terms of hypergeometric functions. The angula... |
2401.06812 | Muhammad Sharif | Iqra Nawazish and M. Sharif | Isotropic Exact Solutions via Noether Symmetries in
$f(R,T,R_{\mu\nu}T^{\mu\nu})$ Gravity | 30 pages, 9 figures | Physica Scripta 98(2023)125008 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study cosmic evolutionary stages in the background of
modified theory admitting non-minimal coupling between Ricci scalar, trace of
the energy-momentum tensor, contracted Ricci and energy-momentum tensors. For
dust distribution, we consider isotropic, homogeneous and flat cosmic model to
determine s... | [
{
"created": "Thu, 11 Jan 2024 09:56:00 GMT",
"version": "v1"
}
] | 2024-01-17 | [
[
"Nawazish",
"Iqra",
""
],
[
"Sharif",
"M.",
""
]
] | In this paper, we study cosmic evolutionary stages in the background of modified theory admitting non-minimal coupling between Ricci scalar, trace of the energy-momentum tensor, contracted Ricci and energy-momentum tensors. For dust distribution, we consider isotropic, homogeneous and flat cosmic model to determine sym... |
gr-qc/0303115 | Sanjeev S. Seahra | Sanjeev S. Seahra, H. R. Sepangi, and J. Ponce de Leon | Brane classical and quantum cosmology from an effective action | Shortened to match version accepted by Phys. Rev. D (unabridged text
found in version 2), 42 pages, 9 figures, Rextex4 | Phys.Rev. D68 (2003) 066009 | 10.1103/PhysRevD.68.066009 | null | gr-qc hep-th | null | Motivated by the Randall-Sundrum brane-world scenario, we discuss the
classical and quantum dynamics of a (d+1)-dimensional boundary wall between a
pair of (d+2)-dimensional topological Schwarzschild-AdS black holes. We assume
there are quite general -- but not completely arbitrary -- matter fields living
on the boun... | [
{
"created": "Mon, 31 Mar 2003 16:11:37 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Apr 2003 18:29:24 GMT",
"version": "v2"
},
{
"created": "Fri, 18 Jul 2003 18:01:21 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Seahra",
"Sanjeev S.",
""
],
[
"Sepangi",
"H. R.",
""
],
[
"de Leon",
"J. Ponce",
""
]
] | Motivated by the Randall-Sundrum brane-world scenario, we discuss the classical and quantum dynamics of a (d+1)-dimensional boundary wall between a pair of (d+2)-dimensional topological Schwarzschild-AdS black holes. We assume there are quite general -- but not completely arbitrary -- matter fields living on the bounda... |
1006.1552 | Naresh Dadhich | Naresh Dadhich | On the enigmatic $\Lambda$ - a true constant of spacetime | 4 pages, a comprehensive revision with much refinement and new
insights, more references added | Pramana 77:433-437,2011 | 10.1007/s12043-011-0163-7 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Had Einstein followed the Bianchi differential identity for the derivation of
his equation of motion for gravitation, $\Lambda$ would have emerged as a true
new constant of spacetime on the same footing as the velocity of light? It is
then conceivable that he could have perhaps made the most profound prediction
that ... | [
{
"created": "Mon, 7 Jun 2010 11:47:47 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Feb 2011 08:47:25 GMT",
"version": "v2"
}
] | 2015-05-19 | [
[
"Dadhich",
"Naresh",
""
]
] | Had Einstein followed the Bianchi differential identity for the derivation of his equation of motion for gravitation, $\Lambda$ would have emerged as a true new constant of spacetime on the same footing as the velocity of light? It is then conceivable that he could have perhaps made the most profound prediction that th... |
2207.00078 | Rahul Kumar | Rahul Kumar Walia, Sushant G Ghosh, and Sunil D Maharaj | Testing Rotating Regular Metrics with EHT Results of Sgr A* | 21 pages, 16 figures and 1 table. Published in the Astrophysical
Journal | The Astrophysical Journal, 939, 77 (2022) | 10.3847/1538-4357/ac9623 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | The Event Horizon Telescope (EHT) observation unveiled the first image of
supermassive black hole Sgr A* showing a shadow of diameter $\theta_{sh}= 48.7
\pm 7\,\mu$as with fractional deviation from the Schwarzschild black hole
shadow diameter $\delta =
-0.08^{+0.09}_{-0.09}~\text{(VLTI)},-0.04^{+0.09}_{-0.10}~\text{(... | [
{
"created": "Thu, 30 Jun 2022 19:41:20 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Sep 2022 12:06:31 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Nov 2022 07:12:02 GMT",
"version": "v3"
}
] | 2022-11-10 | [
[
"Walia",
"Rahul Kumar",
""
],
[
"Ghosh",
"Sushant G",
""
],
[
"Maharaj",
"Sunil D",
""
]
] | The Event Horizon Telescope (EHT) observation unveiled the first image of supermassive black hole Sgr A* showing a shadow of diameter $\theta_{sh}= 48.7 \pm 7\,\mu$as with fractional deviation from the Schwarzschild black hole shadow diameter $\delta = -0.08^{+0.09}_{-0.09}~\text{(VLTI)},-0.04^{+0.09}_{-0.10}~\text{(Ke... |
1507.04911 | Chen Wu | Chen Wu and Renli Xu | Decay of massive scalar field in a black hole background immersed in
magnetic field | 11 pages, 2 Figs, 2 Tables | null | 10.1140/epjc/s10052-015-3632-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We evaluate quasinormal modes of massive scalar field of the Ernst spacetime,
an exact solution of the Einstein-Maxwell equations describing a black hole
immersed in uniform magnetic field $B$. It is known that the quasinormal
spectrum for massive scalar field in the vicinity of the magnetized black holes
acquires an... | [
{
"created": "Thu, 16 Jul 2015 11:49:42 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Aug 2015 08:55:41 GMT",
"version": "v2"
},
{
"created": "Tue, 25 Aug 2015 10:23:15 GMT",
"version": "v3"
}
] | 2015-09-30 | [
[
"Wu",
"Chen",
""
],
[
"Xu",
"Renli",
""
]
] | We evaluate quasinormal modes of massive scalar field of the Ernst spacetime, an exact solution of the Einstein-Maxwell equations describing a black hole immersed in uniform magnetic field $B$. It is known that the quasinormal spectrum for massive scalar field in the vicinity of the magnetized black holes acquires an e... |
2101.01186 | Francisco Duque | Vitor Cardoso, Francisco Duque and Gaurav Khanna | Gravitational tuning forks and hierarchical triple systems | 6 pages, 4 figures, v2: version to appear in Physical Review D
Letters | Phys. Rev. D 103, 081501 (2021) | 10.1103/PhysRevD.103.L081501 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We study gravitational wave (GW) emission in the strong-field regime by a
hierarchical triple system composed of a binary system placed in the vicinity
of a supermassive black hole (SMBH). The LIGO-Virgo collaboration recently
reported evidence for coalescences with this dynamical origin. These systems
are common in ... | [
{
"created": "Mon, 4 Jan 2021 19:00:02 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Apr 2021 14:10:51 GMT",
"version": "v2"
}
] | 2021-04-28 | [
[
"Cardoso",
"Vitor",
""
],
[
"Duque",
"Francisco",
""
],
[
"Khanna",
"Gaurav",
""
]
] | We study gravitational wave (GW) emission in the strong-field regime by a hierarchical triple system composed of a binary system placed in the vicinity of a supermassive black hole (SMBH). The LIGO-Virgo collaboration recently reported evidence for coalescences with this dynamical origin. These systems are common in ga... |
1305.3709 | Barun Majumder | Barun Majumder | Singularity Free Rainbow Universe | This essay received an honorable mention in the 2013 Essay
Competition of the Gravity Research Foundation | IJMPD 22 (2013) 1342021 | 10.1142/S0218271813420212 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Isotropic quantum cosmological perfect fluid model is studied in the
formalism of Rainbow gravity. It is found that the only surviving matter degree
of freedom played the role of cosmic time. It is possible to find the wave
packet naturally with a suitable choice of the Rainbow functions which resulted
from the super... | [
{
"created": "Thu, 16 May 2013 08:29:55 GMT",
"version": "v1"
}
] | 2013-09-26 | [
[
"Majumder",
"Barun",
""
]
] | Isotropic quantum cosmological perfect fluid model is studied in the formalism of Rainbow gravity. It is found that the only surviving matter degree of freedom played the role of cosmic time. It is possible to find the wave packet naturally with a suitable choice of the Rainbow functions which resulted from the superpo... |
1808.00207 | Aurelien Barrau | Flora Moulin, Killian Martineau, Julien Grain, Aur\'elien Barrau | Quantum fields in the background spacetime of a loop quantum gravity
black hole | null | null | 10.1088/1361-6382/ab207c | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The description of black holes in loop quantum gravity is a hard and tricky
task. In this article, we focus on a minisuperspace approach based on a
polymerization procedure. We consider the resulting effective metric and study
the propagation of quantum fields in this background. The cross sections for
scalar particl... | [
{
"created": "Wed, 1 Aug 2018 07:43:43 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Mar 2019 21:10:57 GMT",
"version": "v2"
},
{
"created": "Wed, 15 May 2019 08:46:01 GMT",
"version": "v3"
}
] | 2019-09-04 | [
[
"Moulin",
"Flora",
""
],
[
"Martineau",
"Killian",
""
],
[
"Grain",
"Julien",
""
],
[
"Barrau",
"Aurélien",
""
]
] | The description of black holes in loop quantum gravity is a hard and tricky task. In this article, we focus on a minisuperspace approach based on a polymerization procedure. We consider the resulting effective metric and study the propagation of quantum fields in this background. The cross sections for scalar particles... |
1712.03831 | Marcelo Vargas dos Santos | Marcelo Vargas dos Santos, Jailson S. Alcaniz, David F. Mota,
Salvatore Capozziello | Screening mechanisms in hybrid metric-Palatini gravity | 7 pages, 2 figures. Accepted for publication in Phys. Rev. D | Phys. Rev. D 97, 104010 (2018) | 10.1103/PhysRevD.97.104010 | null | gr-qc astro-ph.CO astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the efficiency of screening mechanisms in the hybrid
metric-Palatini gravity. The value of the field is computed around spherical
bodies embedded in a background of constant density. We find a thin shell
condition for the field depending on the background field value. In order to
quantify how the thin ... | [
{
"created": "Fri, 8 Dec 2017 11:56:14 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Apr 2018 15:58:49 GMT",
"version": "v2"
}
] | 2018-05-16 | [
[
"Santos",
"Marcelo Vargas dos",
""
],
[
"Alcaniz",
"Jailson S.",
""
],
[
"Mota",
"David F.",
""
],
[
"Capozziello",
"Salvatore",
""
]
] | We investigate the efficiency of screening mechanisms in the hybrid metric-Palatini gravity. The value of the field is computed around spherical bodies embedded in a background of constant density. We find a thin shell condition for the field depending on the background field value. In order to quantify how the thin sh... |
2006.08507 | Maria-Jose Guzman | Alexey Golovnev, Maria-Jose Guzman | Bianchi identities in f(T) gravity: paving the way to confrontation with
astrophysics | 7 pages, no figures, comments welcome; minor changes, references
added, matches the published version | Phys. Lett. B810, 135806 (2020) | 10.1016/j.physletb.2020.135806 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | Theories of $f(T)$ gravity are being actively confronted with cosmological
observations, and are being studied for their potential to solve famous
problems of cosmology. A necessary step is to extend these studies to
astrophysical settings. However, to this end one must understand the structure
of spherically symmetr... | [
{
"created": "Mon, 15 Jun 2020 16:04:33 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Oct 2020 01:20:15 GMT",
"version": "v2"
}
] | 2020-10-06 | [
[
"Golovnev",
"Alexey",
""
],
[
"Guzman",
"Maria-Jose",
""
]
] | Theories of $f(T)$ gravity are being actively confronted with cosmological observations, and are being studied for their potential to solve famous problems of cosmology. A necessary step is to extend these studies to astrophysical settings. However, to this end one must understand the structure of spherically symmetric... |
gr-qc/9802042 | Zloshchastiev Konstantin | Konstantin G. Zloshchastiev (Dnepropetrovsk University, Ukraine) | Mass of perfect fluid black shells | 1 figure, LaTeX; final version + FAQ | Mod.Phys.Lett. A13 (1998) 1419 | 10.1142/S0217732398001492 | null | gr-qc | null | The spherically symmetric singular perfect fluid shells are considered for
the case of their radii being equal to the event horizon (the black shells). We
study their observable masses, depending at least on the three parameters,
viz., the square speed of sound in the shell, instantaneous radial velocity of
the shell... | [
{
"created": "Tue, 17 Feb 1998 11:37:32 GMT",
"version": "v1"
},
{
"created": "Thu, 14 May 1998 14:56:42 GMT",
"version": "v2"
},
{
"created": "Fri, 26 Jun 1998 12:14:52 GMT",
"version": "v3"
},
{
"created": "Tue, 23 Feb 1999 16:08:19 GMT",
"version": "v4"
}
] | 2009-10-31 | [
[
"Zloshchastiev",
"Konstantin G.",
"",
"Dnepropetrovsk University, Ukraine"
]
] | The spherically symmetric singular perfect fluid shells are considered for the case of their radii being equal to the event horizon (the black shells). We study their observable masses, depending at least on the three parameters, viz., the square speed of sound in the shell, instantaneous radial velocity of the shell a... |
1401.6562 | Carlo Rovelli | Carlo Rovelli and Francesca Vidotto | Planck stars | 6 pages, 3 figures. Nice paper | null | 10.1142/S0218271814420267 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A star that collapses gravitationally can reach a further stage of its life,
where quantum-gravitational pressure counteracts weight. The duration of this
stage is very short in the star proper time, yielding a bounce, but extremely
long seen from the outside, because of the huge gravitational time dilation.
Since th... | [
{
"created": "Sat, 25 Jan 2014 18:09:39 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jan 2014 09:39:27 GMT",
"version": "v2"
},
{
"created": "Fri, 31 Jan 2014 13:57:15 GMT",
"version": "v3"
},
{
"created": "Sat, 8 Feb 2014 23:28:03 GMT",
"version": "v4"
}
] | 2015-02-10 | [
[
"Rovelli",
"Carlo",
""
],
[
"Vidotto",
"Francesca",
""
]
] | A star that collapses gravitationally can reach a further stage of its life, where quantum-gravitational pressure counteracts weight. The duration of this stage is very short in the star proper time, yielding a bounce, but extremely long seen from the outside, because of the huge gravitational time dilation. Since the ... |
1803.02350 | Hao Liu | James Creswell, Hao Liu, Andrew D. Jackson, Sebastian von Hausegger,
Pavel Naselsky | Degeneracy of gravitational waveforms in the context of GW150914 | Accepted for publication in JCAP | JCAP03(2018)007 | 10.1088/1475-7516/2018/03/007 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the degeneracy of theoretical gravitational waveforms for binary
black hole mergers using an aligned-spin effective-one-body model. After
appropriate truncation, bandpassing, and matching, we identify regions in the
mass--spin parameter space containing waveforms similar to the template
proposed for GW150914... | [
{
"created": "Tue, 6 Mar 2018 08:05:49 GMT",
"version": "v1"
}
] | 2018-03-21 | [
[
"Creswell",
"James",
""
],
[
"Liu",
"Hao",
""
],
[
"Jackson",
"Andrew D.",
""
],
[
"von Hausegger",
"Sebastian",
""
],
[
"Naselsky",
"Pavel",
""
]
] | We study the degeneracy of theoretical gravitational waveforms for binary black hole mergers using an aligned-spin effective-one-body model. After appropriate truncation, bandpassing, and matching, we identify regions in the mass--spin parameter space containing waveforms similar to the template proposed for GW150914, ... |
1808.02459 | Christoph Dreissigacker | Christoph Dreissigacker, Reinhard Prix and Karl Wette | Fast and Accurate Sensitivity Estimation for
Continuous-Gravitational-Wave Searches | (31 pages, 11 figures, 5 tables) | Phys. Rev. D 98, 084058 (2018) | 10.1103/PhysRevD.98.084058 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents an efficient numerical sensitivity-estimation method and
implementation for continuous-gravitational-wave searches, extending and
generalizing an earlier analytic approach by Wette [1]. This estimation
framework applies to a broad class of F-statistic-based search meth- ods,
namely (i) semi-cohere... | [
{
"created": "Tue, 7 Aug 2018 17:01:41 GMT",
"version": "v1"
}
] | 2018-11-07 | [
[
"Dreissigacker",
"Christoph",
""
],
[
"Prix",
"Reinhard",
""
],
[
"Wette",
"Karl",
""
]
] | This paper presents an efficient numerical sensitivity-estimation method and implementation for continuous-gravitational-wave searches, extending and generalizing an earlier analytic approach by Wette [1]. This estimation framework applies to a broad class of F-statistic-based search meth- ods, namely (i) semi-coherent... |
1909.09045 | Jose Beltran Jimenez | Jose Beltr\'an Jim\'enez, Lavinia Heisenberg, Damianos Iosifidis,
Alejandro Jim\'enez-Cano and Tomi S. Koivisto | General Teleparallel Quadratic Gravity | 12 pages, no figures | null | 10.1016/j.physletb.2020.135422 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this Letter we consider a general quadratic parity-preserving theory for a
general flat connection. Imposing a local symmetry under the general linear
group singles out the general teleparallel equivalent of General Relativity
carrying both torsion and non-metricity. We provide a detailed discussion on
the telepar... | [
{
"created": "Thu, 19 Sep 2019 15:23:25 GMT",
"version": "v1"
}
] | 2020-04-22 | [
[
"Jiménez",
"Jose Beltrán",
""
],
[
"Heisenberg",
"Lavinia",
""
],
[
"Iosifidis",
"Damianos",
""
],
[
"Jiménez-Cano",
"Alejandro",
""
],
[
"Koivisto",
"Tomi S.",
""
]
] | In this Letter we consider a general quadratic parity-preserving theory for a general flat connection. Imposing a local symmetry under the general linear group singles out the general teleparallel equivalent of General Relativity carrying both torsion and non-metricity. We provide a detailed discussion on the teleparal... |
2011.00019 | Silvia Trabucco | Massimo Mannarelli, Dario Grasso, Silvia Trabucco, Maria Luisa
Chiofalo | Hawking temperature and phonon emission in acoustic holes | 8 pages, 2 figure. Improved discussion, added two appendices.
Accepted for publication on Physical Review D | Phys. Rev. D 103, 076001(2021) | 10.1103/PhysRevD.103.076001 | null | gr-qc cond-mat.other hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Acoustic holes are the hydrodynamic analogue of standard black holes.
Featuring an acoustic horizon, these systems spontaneously emit phonons at the
Hawking temperature. We derive the Hawking temperature of the acoustic horizon
by fully exploiting the analogy between black and acoustic holes within a
covariant kineti... | [
{
"created": "Fri, 30 Oct 2020 18:00:36 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Mar 2021 10:02:42 GMT",
"version": "v2"
},
{
"created": "Wed, 19 May 2021 12:07:09 GMT",
"version": "v3"
},
{
"created": "Thu, 20 May 2021 06:02:21 GMT",
"version": "v4"
}
] | 2021-05-21 | [
[
"Mannarelli",
"Massimo",
""
],
[
"Grasso",
"Dario",
""
],
[
"Trabucco",
"Silvia",
""
],
[
"Chiofalo",
"Maria Luisa",
""
]
] | Acoustic holes are the hydrodynamic analogue of standard black holes. Featuring an acoustic horizon, these systems spontaneously emit phonons at the Hawking temperature. We derive the Hawking temperature of the acoustic horizon by fully exploiting the analogy between black and acoustic holes within a covariant kinetic ... |
1501.04863 | Seyed Hossein Hendi Dr. | S. H. Hendi and M. Momennia | Thermodynamic instability of topological black holes with nonlinear
source | 17 pages with 14 figures, accepted in EPJC | Eur. Phys. J. C 75 (2015) 54 | 10.1140/epjc/s10052-015-3283-2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we obtain higher dimensional topological black hole solutions
of Einstein-$\Lambda$ gravity in the presence of a class of nonlinear
electrodynamics. First, we calculate the conserved and thermodynamic quantities
of ($n+1$)-dimensional asymptotically flat solutions and show that they satisfy
the first l... | [
{
"created": "Fri, 16 Jan 2015 14:55:25 GMT",
"version": "v1"
}
] | 2015-07-13 | [
[
"Hendi",
"S. H.",
""
],
[
"Momennia",
"M.",
""
]
] | In this paper, we obtain higher dimensional topological black hole solutions of Einstein-$\Lambda$ gravity in the presence of a class of nonlinear electrodynamics. First, we calculate the conserved and thermodynamic quantities of ($n+1$)-dimensional asymptotically flat solutions and show that they satisfy the first law... |
2306.13153 | Lidia J. Gomes Da Silva Miss | Lidia J. Gomes Da Silva, Rodrigo Panosso Macedo and Jonathan E.
Thompson, Juan A. Valiente Kroon, Leanne Durkan, Oliver Long | Hyperboloidal discontinuous time-symmetric numerical algorithm with
higher order jumps for gravitational self-force computations in the time
domain | 37 pages; Corrected to accommodate for valuable feedback from the
referee; Minor typos corrected in Appendix B | null | null | null | gr-qc cs.NA math.NA physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the next decade the Laser Interferometer Space Antenna (LISA) is due
to be launched, providing the opportunity to extract physics from stellar
objects and systems, such as \textit{Extreme Mass Ratio Inspirals}, (EMRIs)
otherwise undetectable to ground based interferometers and Pulsar Timing Arrays
(PTA). Unlik... | [
{
"created": "Thu, 22 Jun 2023 18:22:19 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Nov 2023 11:38:47 GMT",
"version": "v2"
}
] | 2023-11-07 | [
[
"Da Silva",
"Lidia J. Gomes",
""
],
[
"Macedo",
"Rodrigo Panosso",
""
],
[
"Thompson",
"Jonathan E.",
""
],
[
"Kroon",
"Juan A. Valiente",
""
],
[
"Durkan",
"Leanne",
""
],
[
"Long",
"Oliver",
""
]
] | Within the next decade the Laser Interferometer Space Antenna (LISA) is due to be launched, providing the opportunity to extract physics from stellar objects and systems, such as \textit{Extreme Mass Ratio Inspirals}, (EMRIs) otherwise undetectable to ground based interferometers and Pulsar Timing Arrays (PTA). Unlike ... |
1512.08746 | Sergey Paston | S.A. Paston | Relation between quantum effects in General Relativity and embedding
theory | LaTeX, 18 pages | Theor. Math. Phys. 185:1 (2015), 1502-1515 | 10.1007/s11232-015-0359-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present results relevant to the relation between quantum effects in a
Riemannian space and on the surface appearing as a result of its isometric
embedding in a flat space of a higher dimension. We discuss the mapping between
the Hawking effect fixed by an observer in the Riemannian space with a horizon
and the Unr... | [
{
"created": "Tue, 29 Dec 2015 18:31:07 GMT",
"version": "v1"
}
] | 2015-12-31 | [
[
"Paston",
"S. A.",
""
]
] | We present results relevant to the relation between quantum effects in a Riemannian space and on the surface appearing as a result of its isometric embedding in a flat space of a higher dimension. We discuss the mapping between the Hawking effect fixed by an observer in the Riemannian space with a horizon and the Unruh... |
1101.3951 | M. D. Maia | M. D. Maia, A. J. S. Capistrano, J. S. Alcaniz and Edmundo M. Monte | The Deformable Universe | 20 pages, LaTeX, 3 figures | Gen.Rel.Grav.43:2685-2700,2011 | 10.1007/s10714-011-1192-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The concept of smooth deformations of a Riemannian manifolds, recently
evidenced by the solution of the Poincar\'e conjecture, is applied to
Einstein's gravitational theory and in particular to the standard FLRW
cosmology. We present a brief review of the deformation of Riemannian geometry,
showing how such deformati... | [
{
"created": "Thu, 20 Jan 2011 16:37:07 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Maia",
"M. D.",
""
],
[
"Capistrano",
"A. J. S.",
""
],
[
"Alcaniz",
"J. S.",
""
],
[
"Monte",
"Edmundo M.",
""
]
] | The concept of smooth deformations of a Riemannian manifolds, recently evidenced by the solution of the Poincar\'e conjecture, is applied to Einstein's gravitational theory and in particular to the standard FLRW cosmology. We present a brief review of the deformation of Riemannian geometry, showing how such deformation... |
2209.03740 | Oliver Long | Leor Barack and Oliver Long | Self-force correction to the deflection angle in black-hole scattering:
a scalar charge toy model | 25 pages, 10 figures; v2 additional sentence below Eq. (125) and
updated references; v3 minor edits to match published version | Phys. Rev. D 106, 104031 (2022) | 10.1103/PhysRevD.106.104031 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using self-force methods, we consider the hyperbolic-type scattering of a
pointlike particle carrying a scalar charge $Q$ off a Schwarzschild black hole.
For given initial velocity and impact parameter, back-reaction from the scalar
field modifies the scattering angle by an amount $\propto\! Q^2$, which we
calculate ... | [
{
"created": "Thu, 8 Sep 2022 12:02:11 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Oct 2022 13:19:50 GMT",
"version": "v2"
},
{
"created": "Tue, 15 Nov 2022 13:15:33 GMT",
"version": "v3"
}
] | 2022-11-16 | [
[
"Barack",
"Leor",
""
],
[
"Long",
"Oliver",
""
]
] | Using self-force methods, we consider the hyperbolic-type scattering of a pointlike particle carrying a scalar charge $Q$ off a Schwarzschild black hole. For given initial velocity and impact parameter, back-reaction from the scalar field modifies the scattering angle by an amount $\propto\! Q^2$, which we calculate nu... |
1109.6737 | Nami Uchikata | Nami Uchikata and Shijun Yoshida | Quasinormal modes of a massless charged scalar field on a small
Reissner-Nordstr\"om-anti-de Sitter black hole | 13 pages, 11 figures | Phys. Rev. D83, 064020 (2011) | 10.1103/PhysRevD.83.064020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate quasinormal modes of a massless charged scalar field on a
small Reissner-Nordstr\"om-anti-de Sitter (RN-AdS) black hole both with
analytical and numerical approaches. In the analytical approach, by using the
small black hole approximation (r_+ << L), we obtain the quasinormal mode
frequencies in the li... | [
{
"created": "Fri, 30 Sep 2011 07:51:12 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Uchikata",
"Nami",
""
],
[
"Yoshida",
"Shijun",
""
]
] | We investigate quasinormal modes of a massless charged scalar field on a small Reissner-Nordstr\"om-anti-de Sitter (RN-AdS) black hole both with analytical and numerical approaches. In the analytical approach, by using the small black hole approximation (r_+ << L), we obtain the quasinormal mode frequencies in the limi... |
2203.12027 | Shounak Ghosh | Saibal Ray, Shounak Ghosh and Rikpratik Sengupta | Gravastar under the framework of braneworld gravity II: effect of the
Kuchowicz metric function | 14 pages, 10 figures | Mod. Phys. Lett. A 2022.37 | 10.1142/S0217732322501954 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent years, a class of compact objects called gravastars have drawn
immense interest as regular solutions to end state stellar collapse. Since the
energy density involved in collapse process is expected to be high, it is a
natural choice to study such compact objects in context of modified gravity
theories which... | [
{
"created": "Sun, 20 Mar 2022 02:40:58 GMT",
"version": "v1"
}
] | 2023-01-03 | [
[
"Ray",
"Saibal",
""
],
[
"Ghosh",
"Shounak",
""
],
[
"Sengupta",
"Rikpratik",
""
]
] | In recent years, a class of compact objects called gravastars have drawn immense interest as regular solutions to end state stellar collapse. Since the energy density involved in collapse process is expected to be high, it is a natural choice to study such compact objects in context of modified gravity theories which r... |
gr-qc/0602084 | Nobuyuki Sakai | Nobuyuki Sakai, Ken-ichi Nakao, Hideki Ishihara, Makoto Kobayashi | The universe out of a monopole in the laboratory? | to appear in Phys. Rev. D with changing title into "Is it possible to
create a universe out of a monopole in the laboratory?", text and figures
revised, 21 pages, 6 figures | Phys.Rev. D74 (2006) 024026 | 10.1103/PhysRevD.74.024026 | OCU-PHYS-241, AP-GR-31 | gr-qc astro-ph hep-ph | null | To explore the possibility that an inflationary universe can be created out
of a stable particle in the laboratory, we consider the classical and quantum
dynamics of a magnetic monopole in the thin-shell approximation. Classically
there are three types of solutions: stable, collapsing and inflating monopoles.
We argu... | [
{
"created": "Tue, 21 Feb 2006 15:03:29 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Mar 2006 11:28:47 GMT",
"version": "v2"
},
{
"created": "Sun, 9 Jul 2006 10:21:58 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Sakai",
"Nobuyuki",
""
],
[
"Nakao",
"Ken-ichi",
""
],
[
"Ishihara",
"Hideki",
""
],
[
"Kobayashi",
"Makoto",
""
]
] | To explore the possibility that an inflationary universe can be created out of a stable particle in the laboratory, we consider the classical and quantum dynamics of a magnetic monopole in the thin-shell approximation. Classically there are three types of solutions: stable, collapsing and inflating monopoles. We argue ... |
2108.09320 | Mohsen Khodadi | Mohsen Khodadi, Ujjal Kumar Dey, Gaetano Lambiase | Strongly Magnetized Hot QCD Matter and Stochastic Gravitational Wave
Background | 17 pages, 4 figures, to appear in PRD | Phys. Rev. D 104, 063039 (2021) | 10.1103/PhysRevD.104.063039 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The first-order phase transitions in the early Universe are one of the
well-known sources which release the stochastic background of gravitational
waves. In this paper, we study the contribution of an external static and
strong magnetic field on the stochastic background of gravitational waves (GWs)
expected during Q... | [
{
"created": "Fri, 20 Aug 2021 18:03:00 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Sep 2021 19:03:55 GMT",
"version": "v2"
}
] | 2021-09-24 | [
[
"Khodadi",
"Mohsen",
""
],
[
"Dey",
"Ujjal Kumar",
""
],
[
"Lambiase",
"Gaetano",
""
]
] | The first-order phase transitions in the early Universe are one of the well-known sources which release the stochastic background of gravitational waves. In this paper, we study the contribution of an external static and strong magnetic field on the stochastic background of gravitational waves (GWs) expected during QCD... |
1305.4529 | Christian Corda | Christian Corda | Non-strictly black body spectrum from the tunnelling mechanism | 8 pages, important typos have been corrected with respect to previous
versions. Cite as arXiv:1305.4529v3 | Ann. Phys. 337, 49 (2013) | 10.1016/j.aop.2013.05.006 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A modern and largely used approach to obtain Hawking radiation is the
tunnelling mechanism. However, in various papers in the literature, the
analysis concerned almost only to obtain the Hawking temperature through a
comparison of the probability of emission of an outgoing particle with the
Boltzmann factor. In a int... | [
{
"created": "Fri, 17 May 2013 15:40:08 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Jul 2014 09:10:42 GMT",
"version": "v2"
},
{
"created": "Fri, 11 Jul 2014 07:34:39 GMT",
"version": "v3"
}
] | 2014-07-14 | [
[
"Corda",
"Christian",
""
]
] | A modern and largely used approach to obtain Hawking radiation is the tunnelling mechanism. However, in various papers in the literature, the analysis concerned almost only to obtain the Hawking temperature through a comparison of the probability of emission of an outgoing particle with the Boltzmann factor. In a inter... |
gr-qc/0703123 | Mohammad Nouri-Zonoz | N. Ahmadi and M. Nouri-Zonoz | Quantum gravitational optics: the induced phase | 10 pages, REVTex format | Class.Quant.Grav.25:135008,2008 | 10.1088/0264-9381/25/13/135008 | IPM/P-2007/015 | gr-qc | null | The geometrical approximation of the extended Maxwell equation in curved
spacetime incorporating interactions induced by the vacuum polarization effects
is considered. Taking into account these QED interactions and employing the
analogy between eikonal equation in geometrical optics and Hamilton-Jacobi
equation for t... | [
{
"created": "Mon, 26 Mar 2007 10:24:27 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ahmadi",
"N.",
""
],
[
"Nouri-Zonoz",
"M.",
""
]
] | The geometrical approximation of the extended Maxwell equation in curved spacetime incorporating interactions induced by the vacuum polarization effects is considered. Taking into account these QED interactions and employing the analogy between eikonal equation in geometrical optics and Hamilton-Jacobi equation for the... |
0906.2343 | Alnadhief H. A. Alfedeel | Alnadhief A. H. Alfedeel, Charles Hellaby | The Lemaitre Model and the Generalisation of the Cosmic Mass | latex, 16 pages, Revision has minor changes due to referee's
comments. | Gen.Rel.Grav.42:1935-1952,2010 | 10.1007/s10714-010-0971-y | UCT-Cosmology-2009-06-12 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the spherically symmetric metric with a comoving perfect fluid
and non-zero pressure -- the Lemaitre metric -- and present it in the form of a
calculational algorithm. We use it to review the definition of mass, and to
look at the apparent horizon relations on the observer's past null cone. We
show that t... | [
{
"created": "Fri, 12 Jun 2009 14:32:03 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Mar 2010 11:57:04 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Mar 2010 13:23:57 GMT",
"version": "v3"
},
{
"created": "Fri, 12 Mar 2010 09:23:06 GMT",
"version": "v4"
}
] | 2014-11-20 | [
[
"Alfedeel",
"Alnadhief A. H.",
""
],
[
"Hellaby",
"Charles",
""
]
] | We consider the spherically symmetric metric with a comoving perfect fluid and non-zero pressure -- the Lemaitre metric -- and present it in the form of a calculational algorithm. We use it to review the definition of mass, and to look at the apparent horizon relations on the observer's past null cone. We show that the... |
gr-qc/0504136 | Tiberiu Harko | M. K. Mak, T. Harko | Relativistic Compact Objects in Isotropic Coordinates | 9 pages, no figures, accepted for publication in Pramana-Journal of
Physics | Pramana 65 (2005) 185-192 | 10.1007/BF02898610 | null | gr-qc | null | We present a matrix method for obtaining new classes of exact solutions for
Einstein's equations representing static perfect fluid spheres. By means of a
matrix transformation, we reduce Einstein's equations to two independent
Riccati type differential equations for which three classes of solutions are
obtained. One ... | [
{
"created": "Thu, 28 Apr 2005 03:08:35 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Mak",
"M. K.",
""
],
[
"Harko",
"T.",
""
]
] | We present a matrix method for obtaining new classes of exact solutions for Einstein's equations representing static perfect fluid spheres. By means of a matrix transformation, we reduce Einstein's equations to two independent Riccati type differential equations for which three classes of solutions are obtained. One cl... |
1703.02062 | Serena Vinciguerra | Serena Vinciguerra, John Veitch and Ilya Mandel | Accelerating gravitational wave parameter estimation with multi-band
template interpolation | null | Classical and Quantum Gravity, Volume 34, Number 11, 2017 | 10.1088/1361-6382/aa6d44 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Parameter estimation on gravitational wave signals from compact binary
coalescence (CBC) requires the evaluation of computationally intensive waveform
models, typically the bottleneck in the analysis. This cost will increase
further as low frequency sensitivity in later second and third generation
detectors motivates... | [
{
"created": "Mon, 6 Mar 2017 19:04:12 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Apr 2017 13:05:34 GMT",
"version": "v2"
},
{
"created": "Fri, 19 May 2017 10:12:35 GMT",
"version": "v3"
}
] | 2017-05-22 | [
[
"Vinciguerra",
"Serena",
""
],
[
"Veitch",
"John",
""
],
[
"Mandel",
"Ilya",
""
]
] | Parameter estimation on gravitational wave signals from compact binary coalescence (CBC) requires the evaluation of computationally intensive waveform models, typically the bottleneck in the analysis. This cost will increase further as low frequency sensitivity in later second and third generation detectors motivates t... |
2406.18943 | Junjie Lu | Junjie Lu and Xin Wu | Effects of Two Quantum Correction Parameters on Chaotic Dynamics of
Particles Near Renormalized Group Improved Schwarzschild Black Holes | 13pages,37figures | null | 10.3390/universe10070277 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A renormalized group improved Schwarzschild black hole spacetime contains two
quantum correction parameters. One parameter $\gamma$ represents the
identification of cutoff of the distance scale, and another parameter $\Omega$
stems from nonperturbative renormalization group theory. The two parameters are
constrained ... | [
{
"created": "Thu, 27 Jun 2024 07:14:00 GMT",
"version": "v1"
}
] | 2024-06-28 | [
[
"Lu",
"Junjie",
""
],
[
"Wu",
"Xin",
""
]
] | A renormalized group improved Schwarzschild black hole spacetime contains two quantum correction parameters. One parameter $\gamma$ represents the identification of cutoff of the distance scale, and another parameter $\Omega$ stems from nonperturbative renormalization group theory. The two parameters are constrained by... |
1202.4995 | Jose Wadih Maluf Dr. | J. W. Maluf, S. C. Ulhoa and J. F. da Rocha-Neto | Gravitational pressure on event horizons and thermodynamics in the
teleparallel framework | 17 pages, 6 figures | Phys. Rev. D 85, 044050 (2012) | 10.1103/PhysRevD.85.044050 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The concept of gravitational pressure is naturally defined in the context of
the teleparallel equivalent of general relativity. Together with the definition
of gravitational energy, we investigate the thermodynamics of rotating black
holes in the teleparallel framework. We obtain the value of the gravitational
pressu... | [
{
"created": "Wed, 22 Feb 2012 18:05:20 GMT",
"version": "v1"
}
] | 2012-02-23 | [
[
"Maluf",
"J. W.",
""
],
[
"Ulhoa",
"S. C.",
""
],
[
"da Rocha-Neto",
"J. F.",
""
]
] | The concept of gravitational pressure is naturally defined in the context of the teleparallel equivalent of general relativity. Together with the definition of gravitational energy, we investigate the thermodynamics of rotating black holes in the teleparallel framework. We obtain the value of the gravitational pressure... |
gr-qc/0409117 | Slava G. Turyshev | Slava G. Turyshev, Michael Martin Nieto, John D. Anderson | Lessons Learned from the Pioneers 10/11 for a Mission to Test the
Pioneer Anomaly | 11 pages, invited talk given at ``35th COSPAR Scientific Assebly,''
July 18-24, 2004, Paris, France | Adv.SpaceRes.39:291-296,2007 | 10.1016/j.asr.2005.07.006 | null | gr-qc astro-ph | null | Analysis of the radio-metric tracking data from the Pioneer 10/11 spacecraft
at distances between 20--70 astronomical units (AU) from the Sun has
consistently indicated the presence of an anomalous, small, constant Doppler
frequency drift. The drift is a blue-shift, uniformly changing with rate a_t =
(2.92 +/- 0.44) ... | [
{
"created": "Thu, 30 Sep 2004 01:24:49 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Nieto",
"Michael Martin",
""
],
[
"Anderson",
"John D.",
""
]
] | Analysis of the radio-metric tracking data from the Pioneer 10/11 spacecraft at distances between 20--70 astronomical units (AU) from the Sun has consistently indicated the presence of an anomalous, small, constant Doppler frequency drift. The drift is a blue-shift, uniformly changing with rate a_t = (2.92 +/- 0.44) x ... |
1402.0118 | Hoda Farahani | M. Khurshudyan, A. Pasqua, J. Sadeghi, and H. Farahani | Quintessence Cosmology with an Effective $\Lambda$-Term in Lyra Manifold | 10 pages | null | 10.1088/0256-307X/32/10/109501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study quintessence cosmology with an effective
$\Lambda$-term in Lyra manifold. We consider three different models by choosing
variable $\Lambda$ depend on time, the Hubble parameter and the energy density
of dark matter and dark energy. Dark energy assumed as quintessence which
interacts with the d... | [
{
"created": "Sat, 1 Feb 2014 19:47:45 GMT",
"version": "v1"
}
] | 2015-10-28 | [
[
"Khurshudyan",
"M.",
""
],
[
"Pasqua",
"A.",
""
],
[
"Sadeghi",
"J.",
""
],
[
"Farahani",
"H.",
""
]
] | In this paper, we study quintessence cosmology with an effective $\Lambda$-term in Lyra manifold. We consider three different models by choosing variable $\Lambda$ depend on time, the Hubble parameter and the energy density of dark matter and dark energy. Dark energy assumed as quintessence which interacts with the dar... |
1810.00809 | Gerhard Rein | Mahir Hadzic, Zhiwu Lin, Gerhard Rein | Stability and instability of self-gravitating relativistic matter
distributions | 93 pages; several proofs are revised and some previous errors
corrected. In particular, Lemma 4.4, which is an important tool in the proof
of Theorem 4.3 but was in part incorrect, also in the published version, has
been corrected | Archive for Rational Mechanics and Analysis, 241, pages 1 - 89
(2021) | 10.1007/s00205-021-01647-2 | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider steady state solutions of the massive, asymptotically flat,
spherically symmetric Einstein-Vlasov system, i.e., relativistic models of
galaxies or globular clusters, and steady state solutions of the Einstein-Euler
system, i.e., relativistic models of stars. Such steady states are embedded
into one-parame... | [
{
"created": "Mon, 1 Oct 2018 16:47:35 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jun 2020 13:07:50 GMT",
"version": "v2"
},
{
"created": "Wed, 30 Jun 2021 09:47:34 GMT",
"version": "v3"
}
] | 2021-07-01 | [
[
"Hadzic",
"Mahir",
""
],
[
"Lin",
"Zhiwu",
""
],
[
"Rein",
"Gerhard",
""
]
] | We consider steady state solutions of the massive, asymptotically flat, spherically symmetric Einstein-Vlasov system, i.e., relativistic models of galaxies or globular clusters, and steady state solutions of the Einstein-Euler system, i.e., relativistic models of stars. Such steady states are embedded into one-paramete... |
1407.6941 | Daniela P\'erez | Daniela P\'erez and Gustavo E. Romero | Gravitational entropy of Kerr black holes | 12 pages, 7 figures, accepted for publication in General Relativity
and Gravitation | null | 10.1007/s10714-014-1774-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Classical invariants of General Relativity can be used to approximate the
entropy of the gravitational field. In this work, we study two proposed
estimators based on scalars constructed out from the Weyl tensor, in Kerr
spacetime. In order to evaluate Clifton, Ellis and Tavakol's proposal, we
calculate the gravitatio... | [
{
"created": "Fri, 25 Jul 2014 15:31:50 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Pérez",
"Daniela",
""
],
[
"Romero",
"Gustavo E.",
""
]
] | Classical invariants of General Relativity can be used to approximate the entropy of the gravitational field. In this work, we study two proposed estimators based on scalars constructed out from the Weyl tensor, in Kerr spacetime. In order to evaluate Clifton, Ellis and Tavakol's proposal, we calculate the gravitationa... |
2206.12673 | Chetan Verma | Chetan Verma, Amit Reza, Gurudatt Gaur, Dilip Krishnaswamy, Sarah
Caudill | Detection of Gravitational Wave Signals from Precessing Binary Black
Hole Systems using Convolutional Neural Network | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Current searches for gravitational waves (GWs) from black hole binaries using
the LIGO and Virgo observatories are limited to analytical models for systems
with black hole spins aligned (or anti-aligned) with the orbital angular
momentum of the binary. Detecting black hole binaries with precessing spinsis
crucial for... | [
{
"created": "Sat, 25 Jun 2022 15:31:04 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Jul 2024 18:28:04 GMT",
"version": "v2"
},
{
"created": "Thu, 25 Jul 2024 09:48:53 GMT",
"version": "v3"
}
] | 2024-07-26 | [
[
"Verma",
"Chetan",
""
],
[
"Reza",
"Amit",
""
],
[
"Gaur",
"Gurudatt",
""
],
[
"Krishnaswamy",
"Dilip",
""
],
[
"Caudill",
"Sarah",
""
]
] | Current searches for gravitational waves (GWs) from black hole binaries using the LIGO and Virgo observatories are limited to analytical models for systems with black hole spins aligned (or anti-aligned) with the orbital angular momentum of the binary. Detecting black hole binaries with precessing spinsis crucial for g... |
gr-qc/0608035 | Sushant Ghosh | S. G. Ghosh and D.W. Deshkar | Exact non-spherical relativistic star | RevTeX, 5 pages, no figure | null | null | null | gr-qc | null | We obtain Vaidya-like solutions to include both a null fluid and a string
fluid in non-spherical (plane symmetric and cylindrical symmetric) anti-de
Sitter space-times. Assuming that string fluid diffuse, we find exact solutions
of Einstein's field equations. Thus we extend a recent work of Glass and Krisch
\cite {gk... | [
{
"created": "Mon, 7 Aug 2006 17:09:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ghosh",
"S. G.",
""
],
[
"Deshkar",
"D. W.",
""
]
] | We obtain Vaidya-like solutions to include both a null fluid and a string fluid in non-spherical (plane symmetric and cylindrical symmetric) anti-de Sitter space-times. Assuming that string fluid diffuse, we find exact solutions of Einstein's field equations. Thus we extend a recent work of Glass and Krisch \cite {gk} ... |
1405.3771 | Shahab Shahidi | Zahra Haghani, Tiberiu Harko, Hamid Reza Sepangi and Shahab Shahidi | Matter may matter | Received an "Honorable Mention" in the Gravity Research Foundation
Essay Contest 2014 | Int. J. Mod. Phys. D 23 (2014) 1442016 | 10.1142/S0218271814420164 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a gravitational theory in which the effective Lagrangian of the
gravitational field is given by an arbitrary function of the Ricci scalar, the
trace of the matter energy-momentum tensor, and the contraction of the Ricci
tensor with the matter energy-momentum tensor. The matter energy-momentum
tensor is gen... | [
{
"created": "Thu, 15 May 2014 08:51:36 GMT",
"version": "v1"
}
] | 2014-12-30 | [
[
"Haghani",
"Zahra",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Sepangi",
"Hamid Reza",
""
],
[
"Shahidi",
"Shahab",
""
]
] | We propose a gravitational theory in which the effective Lagrangian of the gravitational field is given by an arbitrary function of the Ricci scalar, the trace of the matter energy-momentum tensor, and the contraction of the Ricci tensor with the matter energy-momentum tensor. The matter energy-momentum tensor is gener... |
1901.01987 | Somenath Chakrabarty | Sanchita Das and Somenath Chakrabarty | On the Eigen Value Problem in Rindler Space | 6 pages, REVTEX. arXiv admin note: substantial text overlap with
arXiv:1801.06774, arXiv:1602.08878 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article in a very general manner we have investigated the eigen value
problem in Rindler space. We have developed the formalism in an exact form. It
has been noticed that although the Hamiltonian is non-hermitian, because of the
PT-symmetric nature, the eigen values are real, where P and T are the parity
oper... | [
{
"created": "Sun, 6 Jan 2019 09:29:29 GMT",
"version": "v1"
}
] | 2019-01-09 | [
[
"Das",
"Sanchita",
""
],
[
"Chakrabarty",
"Somenath",
""
]
] | In this article in a very general manner we have investigated the eigen value problem in Rindler space. We have developed the formalism in an exact form. It has been noticed that although the Hamiltonian is non-hermitian, because of the PT-symmetric nature, the eigen values are real, where P and T are the parity operat... |
0705.3916 | Geusa Marques AMarques | Geusa de A. Marques | Analogue of superradiance effect in acoustic black hole in the presence
of disclination | No figures | null | null | null | gr-qc | null | In this paper we invstigate the possibility of the acoustic analogue of a
phenomenon like superradiance, that is, the amplification of a sound wave by
reflection from the ergo-region of a rotating acoustic black hole in the fluid
"draining bathtub" model in the presence of a desclination be amplified or
reduced in ag... | [
{
"created": "Sun, 27 May 2007 00:12:33 GMT",
"version": "v1"
}
] | 2007-05-29 | [
[
"Marques",
"Geusa de A.",
""
]
] | In this paper we invstigate the possibility of the acoustic analogue of a phenomenon like superradiance, that is, the amplification of a sound wave by reflection from the ergo-region of a rotating acoustic black hole in the fluid "draining bathtub" model in the presence of a desclination be amplified or reduced in agre... |
1505.05727 | Parampreet Singh | Naresh Dadhich, Anton Joe, Parampreet Singh | Emergence of product of constant curvature spaces in loop quantum
cosmology | References added. Published in CQG | Class. Quantum. Grav. 32, 185006 (2015) | 10.1088/0264-9381/32/18/185006 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The loop quantum dynamics of Kantowski-Sachs spacetime and the interior of
higher genus black hole spacetimes with a cosmological constant has some
peculiar features not shared by various other spacetimes in loop quantum
cosmology. As in the other cases, though the quantum geometric effects resolve
the physical singu... | [
{
"created": "Thu, 21 May 2015 13:26:00 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Sep 2015 21:51:30 GMT",
"version": "v2"
}
] | 2015-09-29 | [
[
"Dadhich",
"Naresh",
""
],
[
"Joe",
"Anton",
""
],
[
"Singh",
"Parampreet",
""
]
] | The loop quantum dynamics of Kantowski-Sachs spacetime and the interior of higher genus black hole spacetimes with a cosmological constant has some peculiar features not shared by various other spacetimes in loop quantum cosmology. As in the other cases, though the quantum geometric effects resolve the physical singula... |
1111.5508 | Mauricio Bellini | Mauricio Bellini (IFIMAR - Mar del Plata University and CONICET) | Quantum origin of pre-big bang collapse from Induced Matter theory of
gravity | final version to be published in Physics Letters B. arXiv admin note:
substantial text overlap with arXiv:1107.2107 | null | 10.1016/j.physletb.2012.02.025 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit a collapsing pre-big-bang model of the universe to study with
detail the non-perturbative quantum dynamics of the dispersal scalar field
whose dynamics becomes from the dynamical foliation of test massless scalar
field $\phi$ on a 5D Riemann-flat metric, such that the extra space-like
coordinate is noncomp... | [
{
"created": "Wed, 23 Nov 2011 14:45:10 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Dec 2011 12:04:56 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Feb 2012 20:07:24 GMT",
"version": "v3"
},
{
"created": "Tue, 14 Feb 2012 20:01:34 GMT",
"version": "v4"
}
] | 2015-06-03 | [
[
"Bellini",
"Mauricio",
"",
"IFIMAR - Mar del Plata University and CONICET"
]
] | We revisit a collapsing pre-big-bang model of the universe to study with detail the non-perturbative quantum dynamics of the dispersal scalar field whose dynamics becomes from the dynamical foliation of test massless scalar field $\phi$ on a 5D Riemann-flat metric, such that the extra space-like coordinate is noncompac... |
0802.2527 | Abhay Ashtekar | Abhay Ashtekar, Jonathan Engle and David Sloan | Asymptotics and Hamiltonians in a First order formalism | 18 pages, No figures. Added a footnote 2 and two references | Class.Quant.Grav.25:095020,2008 | 10.1088/0264-9381/25/9/095020 | IGC-08/02-4 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider 4-dimensional space-times which are asymptotically flat at
spatial infinity and show that, in the first order framework, action principle
for general relativity is well-defined \emph{without the need of infinite
counter terms.} It naturally leads to a covariant phase space in which the
Hamiltonians genera... | [
{
"created": "Mon, 18 Feb 2008 20:00:06 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Mar 2008 21:11:31 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Engle",
"Jonathan",
""
],
[
"Sloan",
"David",
""
]
] | We consider 4-dimensional space-times which are asymptotically flat at spatial infinity and show that, in the first order framework, action principle for general relativity is well-defined \emph{without the need of infinite counter terms.} It naturally leads to a covariant phase space in which the Hamiltonians generati... |
2003.08428 | V. Sreenath | Ivan Agullo, Javier Olmedo and V. Sreenath | Hamiltonian theory of classical and quantum gauge invariant
perturbations in Bianchi I spacetimes | v1: 41 pages, 3 figures; v2 : 42 pages, 4 figures, minor changes, one
figure and references added, version published in Phys. Rev. D | Phys. Rev. D 101, 123531 (2020) | 10.1103/PhysRevD.101.123531 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a Hamiltonian formulation of the theory of gauge invariant, linear
perturbations in anisotropic Bianchi I spacetimes, and describe how to quantize
this system. The matter content is assumed to be a minimally coupled scalar
field with potential $V(\phi)$. We show that a Bianchi I spacetime generically
induce... | [
{
"created": "Wed, 18 Mar 2020 18:40:52 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Jul 2020 17:35:21 GMT",
"version": "v2"
}
] | 2020-07-07 | [
[
"Agullo",
"Ivan",
""
],
[
"Olmedo",
"Javier",
""
],
[
"Sreenath",
"V.",
""
]
] | We derive a Hamiltonian formulation of the theory of gauge invariant, linear perturbations in anisotropic Bianchi I spacetimes, and describe how to quantize this system. The matter content is assumed to be a minimally coupled scalar field with potential $V(\phi)$. We show that a Bianchi I spacetime generically induces ... |
1609.00636 | Yi Liao | Yi Liao, Xiao-Bo Gong, and Jian-Sheng Wu | Phase-Transition Theory of Kerr Black Holes in Electromagnetic Field | 11 pages, 2 figures | null | 10.3847/1538-4357/835/2/247 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For a Kerr black hole (KBH) with spin $J$ and mass $M$ in a steady
electromagnetic field, a special Wald vacuum solution (WVS) has been found in
the case of no-source uniform field. For WVS, the Meissner effect (ME) occurs
only in the the extreme KBH where $M^2/J=1$, in this case, the magnetic field
is totally exclud... | [
{
"created": "Fri, 2 Sep 2016 15:01:46 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Sep 2016 16:15:54 GMT",
"version": "v2"
}
] | 2017-02-08 | [
[
"Liao",
"Yi",
""
],
[
"Gong",
"Xiao-Bo",
""
],
[
"Wu",
"Jian-Sheng",
""
]
] | For a Kerr black hole (KBH) with spin $J$ and mass $M$ in a steady electromagnetic field, a special Wald vacuum solution (WVS) has been found in the case of no-source uniform field. For WVS, the Meissner effect (ME) occurs only in the the extreme KBH where $M^2/J=1$, in this case, the magnetic field is totally excluded... |
gr-qc/0410084 | Antonio F. Ranada | Antonio F. Ranada (Departamento de Fisica Aplicada III, Universidad
Complutense, Madrid, Spain) | The Pioneer anomaly as acceleration of the clocks | 18 pages, no figures. The notation for $a_{\tm t}$ has been changed
in order to use the same as Anderson et al. This amounts to the insertion of
factors 2 or 1/2 in some equations | Found.Phys. 34 (2005) 1955-1971 | 10.1007/s10701-004-1629-y | null | gr-qc | null | This work proposes an explanation of the Pioneer anomaly, the unmodelled and
as yet unexplained blueshift detected in the microwave signal of the Pioneer 10
and other spaceships by Anderson {\it et al} in 1998. What they observed is
similar to the effect that would have either (i) an anomalous acceleration
$a_{\rm P}... | [
{
"created": "Mon, 18 Oct 2004 15:25:09 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jan 2005 10:12:08 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Ranada",
"Antonio F.",
"",
"Departamento de Fisica Aplicada III, Universidad\n Complutense, Madrid, Spain"
]
] | This work proposes an explanation of the Pioneer anomaly, the unmodelled and as yet unexplained blueshift detected in the microwave signal of the Pioneer 10 and other spaceships by Anderson {\it et al} in 1998. What they observed is similar to the effect that would have either (i) an anomalous acceleration $a_{\rm P}$ ... |
2206.05073 | Christiane Klein | Christiane Klein | Construction of the Unruh State for a Real Scalar Field on the Kerr-de
Sitter Spacetime | 42 pages, 4 figures, 2 appendices, version as accepted for
publication in Ann. Henri Poincar\'e | Annales Henri Poincar\'e 78 (2023) | 10.1007/s00023-023-01273-6 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | The study of physical effects of quatum fields in black hole spacetimes,
which is related to questions such as the validity of the strong cosmic
censorship conjecture, requires a Hadamard state describing the physical
situation. Here, we consider the theory of a free scalar field on a Kerr-de
Sitter spacetime, focuss... | [
{
"created": "Fri, 10 Jun 2022 13:08:16 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Feb 2023 09:54:45 GMT",
"version": "v2"
}
] | 2023-02-28 | [
[
"Klein",
"Christiane",
""
]
] | The study of physical effects of quatum fields in black hole spacetimes, which is related to questions such as the validity of the strong cosmic censorship conjecture, requires a Hadamard state describing the physical situation. Here, we consider the theory of a free scalar field on a Kerr-de Sitter spacetime, focussin... |
2407.00287 | Shinji Tsujikawa | Antonio De Felice, Shinji Mukohyama, Shinji Tsujikawa, Anzhong Wang,
Chao Zhang | Even- and odd-parity stabilities of black holes in Einstein-Aether
gravity | 12 pages, no figures | null | null | YITP-24-74, IPMU24-0028, WUCG-24-06 | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | In Einstein-Aether theories with a timelike unit vector field, we study the
linear stability of static and spherically symmetric black holes against both
even- and odd-parity perturbations. For this purpose, we formulate a
gauge-invariant black hole perturbation theory in the background
Aether-orthogonal frame where ... | [
{
"created": "Sat, 29 Jun 2024 02:45:47 GMT",
"version": "v1"
}
] | 2024-07-02 | [
[
"De Felice",
"Antonio",
""
],
[
"Mukohyama",
"Shinji",
""
],
[
"Tsujikawa",
"Shinji",
""
],
[
"Wang",
"Anzhong",
""
],
[
"Zhang",
"Chao",
""
]
] | In Einstein-Aether theories with a timelike unit vector field, we study the linear stability of static and spherically symmetric black holes against both even- and odd-parity perturbations. For this purpose, we formulate a gauge-invariant black hole perturbation theory in the background Aether-orthogonal frame where th... |
1512.06048 | Orlando Luongo | Orlando Luongo, Giovanni Battista Pisani, Hernando Quevedo | Cardy-Verlinde entropy in Ho\v{r}ava-Lifshitz gravity | 9 pages, 1 figure | Phys. Rev. D 93, 064057 (2016) | 10.1103/PhysRevD.93.064057 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate homogeneous cosmological models with perfect-fluid sources in
the framework of the Ho\v rava-Lifshitz model for quantum gravity. We show that
the Hamiltonian constraint of such spacetimes can be rewritten as the Cardy
formula for the entropy in conformal field theory. The Cardy entropy is shown
to depe... | [
{
"created": "Fri, 18 Dec 2015 17:32:44 GMT",
"version": "v1"
}
] | 2016-03-30 | [
[
"Luongo",
"Orlando",
""
],
[
"Pisani",
"Giovanni Battista",
""
],
[
"Quevedo",
"Hernando",
""
]
] | We investigate homogeneous cosmological models with perfect-fluid sources in the framework of the Ho\v rava-Lifshitz model for quantum gravity. We show that the Hamiltonian constraint of such spacetimes can be rewritten as the Cardy formula for the entropy in conformal field theory. The Cardy entropy is shown to depend... |
1709.05933 | Sven Meyer | Sven Meyer, Matthias Bartelmann | Light propagation in linearly perturbed $\Lambda$LTB models | 18 pages, 1 figure, prepared for submission to JCAP | null | 10.1088/1475-7516/2017/11/037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply a generic formalism of light propagation to linearly perturbed
spherically symmetric dust models including a cosmological constant. For a
comoving observer on the central worldline, we derive the equation of geodesic
deviation and perform a suitable spherical harmonic decomposition. This allows
to map the ab... | [
{
"created": "Thu, 14 Sep 2017 15:24:47 GMT",
"version": "v1"
}
] | 2017-12-06 | [
[
"Meyer",
"Sven",
""
],
[
"Bartelmann",
"Matthias",
""
]
] | We apply a generic formalism of light propagation to linearly perturbed spherically symmetric dust models including a cosmological constant. For a comoving observer on the central worldline, we derive the equation of geodesic deviation and perform a suitable spherical harmonic decomposition. This allows to map the abst... |
0802.2520 | Pablo Laguna | M. C. Washik, J. Healy, F. Herrmann, I. Hinder, D. M. Shoemaker, P.
Laguna, R. A. Matzner | Binary Black Hole Encounters, Gravitational Bursts and Maximum Final
Spin | Replaced with version to appear in PRL | Phys.Rev.Lett.101:061102,2008 | 10.1103/PhysRevLett.101.061102 | null | gr-qc astro-ph | http://creativecommons.org/licenses/by/3.0/ | The spin of the final black hole in the coalescence of nonspinning black
holes is determined by the ``residual'' orbital angular momentum of the binary.
This residual momentum consists of the orbital angular momentum that the binary
is not able to shed in the process of merging. We study the angular momentum
radiated... | [
{
"created": "Mon, 18 Feb 2008 17:24:58 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Jul 2008 14:38:59 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Washik",
"M. C.",
""
],
[
"Healy",
"J.",
""
],
[
"Herrmann",
"F.",
""
],
[
"Hinder",
"I.",
""
],
[
"Shoemaker",
"D. M.",
""
],
[
"Laguna",
"P.",
""
],
[
"Matzner",
"R. A.",
""
]
] | The spin of the final black hole in the coalescence of nonspinning black holes is determined by the ``residual'' orbital angular momentum of the binary. This residual momentum consists of the orbital angular momentum that the binary is not able to shed in the process of merging. We study the angular momentum radiated, ... |
1910.09835 | Saskia Grunau | Saskia Grunau and Matthias Kruse | Motion of charged particles around a scalarized black hole in
Kaluza-Klein theory | 19 pages, 6 figures | Phys. Rev. D 101, 024051 (2020) | 10.1103/PhysRevD.101.024051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we study the geodesic motion of charged particles in the
spacetime of an extremal rotating dyonic black hole in Kaluza-Klein theory. We
derive the equations of motion and present their analytical solutions in terns
of elliptic and hyperelliptic functions. Furthermore, we analyze the geodesic
motions w... | [
{
"created": "Tue, 22 Oct 2019 08:50:21 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Jan 2020 09:24:43 GMT",
"version": "v2"
}
] | 2020-01-31 | [
[
"Grunau",
"Saskia",
""
],
[
"Kruse",
"Matthias",
""
]
] | In this article we study the geodesic motion of charged particles in the spacetime of an extremal rotating dyonic black hole in Kaluza-Klein theory. We derive the equations of motion and present their analytical solutions in terns of elliptic and hyperelliptic functions. Furthermore, we analyze the geodesic motions wit... |
gr-qc/0410029 | Kholodenko Arkady L. | Arkady L.Kholodenko and Ethan E.Ballard | From Ginzburg-Landau to Hilbert-Einstein via Yamabe | 69 pages, 5 figures | PhysicaA380:115-162,2007 | 10.1016/j.physa.2007.02.053 | null | gr-qc | null | In this work, based on some mathematical results obtained by Yamabe, Osgood,
Phillips and Sarnak, we demonstrate that in dimensions three and higher the
famous Ginzburg-Landau equations used in theory of phase transitions can be
obtained (without any approximations) by minimization of the Riemannian-type
Hilbert-Eins... | [
{
"created": "Wed, 6 Oct 2004 22:23:44 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Oct 2004 01:26:16 GMT",
"version": "v2"
},
{
"created": "Tue, 12 Oct 2004 20:42:56 GMT",
"version": "v3"
},
{
"created": "Fri, 15 Oct 2004 21:23:43 GMT",
"version": "v4"
},
{
"cre... | 2009-09-29 | [
[
"Kholodenko",
"Arkady L.",
""
],
[
"Ballard",
"Ethan E.",
""
]
] | In this work, based on some mathematical results obtained by Yamabe, Osgood, Phillips and Sarnak, we demonstrate that in dimensions three and higher the famous Ginzburg-Landau equations used in theory of phase transitions can be obtained (without any approximations) by minimization of the Riemannian-type Hilbert-Einste... |
gr-qc/0311076 | Ali Shojai | Ali Shojai & Fatimah Shojai | Constraints Algebra and Equations of Motion in Bohmian Interpretation of
Quantum Gravity | 9 journal pages | Class.Quant.Grav. 21 (2004) 1-10 | 10.1088/0264-9381/21/1/001 | null | gr-qc | null | It is shown that introducing the quantum effects using deBroglie--Bohm theory
in the canonical formulation of gravity would change the constraints algebra.
The new algebra is derived and shown that it is the clear projection of general
coordinate transformations to the spatial and temporal diffeomorphisms. The
quantu... | [
{
"created": "Sat, 22 Nov 2003 07:15:35 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Shojai",
"Ali",
""
],
[
"Shojai",
"Fatimah",
""
]
] | It is shown that introducing the quantum effects using deBroglie--Bohm theory in the canonical formulation of gravity would change the constraints algebra. The new algebra is derived and shown that it is the clear projection of general coordinate transformations to the spatial and temporal diffeomorphisms. The quantum ... |
1911.00945 | Alberto Molgado | Jasel Berra-Montiel and Alberto Molgado | Deformation quantization of constrained systems: a group averaging
approach | 16 pages, no figures | null | 10.1088/1361-6382/ab6861 | null | gr-qc hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by certain concepts introduced by the Refined Algebraic
Quantization formalism for constrained systems which has been successfully
applied within the context of Loop Quantum Gravity, in this paper we propose a
phase space implementation of the Dirac quantization formalism to appropriately
include systems wi... | [
{
"created": "Sun, 3 Nov 2019 18:58:54 GMT",
"version": "v1"
}
] | 2020-04-08 | [
[
"Berra-Montiel",
"Jasel",
""
],
[
"Molgado",
"Alberto",
""
]
] | Motivated by certain concepts introduced by the Refined Algebraic Quantization formalism for constrained systems which has been successfully applied within the context of Loop Quantum Gravity, in this paper we propose a phase space implementation of the Dirac quantization formalism to appropriately include systems with... |
gr-qc/9308017 | David Valls Gabaud | David Valls-Gabaud and Thomas Zannias | On the mechanism of trapped surface formation | PostScript, 9 pages with 3 figures (included) | null | 10.1103/PhysRevD.48.2943 | null | gr-qc astro-ph | null | By a combination of analytical and numerical methods, the density profile of
a momentarily at rest spherical star is varied, and the corresponding response
in the area of the spherical shells is monitored. It is shown that the inner
apparent horizon (if it exists) must lie within or at most on the star's
surface, whi... | [
{
"created": "Thu, 19 Aug 1993 04:51:03 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Valls-Gabaud",
"David",
""
],
[
"Zannias",
"Thomas",
""
]
] | By a combination of analytical and numerical methods, the density profile of a momentarily at rest spherical star is varied, and the corresponding response in the area of the spherical shells is monitored. It is shown that the inner apparent horizon (if it exists) must lie within or at most on the star's surface, while... |
gr-qc/0612056 | Lorenzo Iorio | Lorenzo Iorio | A model-independent test of spatial variations of the Newtonian
gravitational constant in some extrasolar planetary systems | LaTex, 9 pages, no figures, 5 tables, 37 references. Thanks to Paolo
Salucci for his important remarks on MOND. To appear in Monthly Notices of
the Royal Astronomical Society | Mon.Not.Roy.Astron.Soc.376:1727-1730,2007 | 10.1111/j.1365-2966.2007.11542.x | null | gr-qc astro-ph hep-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we directly constrain possible spatial variations of the
Newtonian gravitational constant G over ranges 0.01-5 AU in various extrasolar
multi-planet systems. By means of the third Kepler's law we determine the
quantity \Gamma_ XY=G_X/G_Y for each couple of planets X and Y located at
different distances ... | [
{
"created": "Sun, 10 Dec 2006 11:40:39 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Jan 2007 08:51:25 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Mar 2007 22:04:31 GMT",
"version": "v3"
},
{
"created": "Thu, 8 Mar 2007 19:00:34 GMT",
"version": "v4"
},
{
"cre... | 2013-10-09 | [
[
"Iorio",
"Lorenzo",
""
]
] | In this paper we directly constrain possible spatial variations of the Newtonian gravitational constant G over ranges 0.01-5 AU in various extrasolar multi-planet systems. By means of the third Kepler's law we determine the quantity \Gamma_ XY=G_X/G_Y for each couple of planets X and Y located at different distances fr... |
1806.03815 | Sergei Filyukov | Sergei Filyukov | Remark on near-horizon geometry of extreme regular black holes | 7 pages v2: presentation improved, references added. The version to
appear in MPLA | null | 10.1142/S0217732318501973 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the near horizon geometry of a generic extreme regular black
hole solution of Einstein gravity coupled to nonlinear electrodynamics is
described by the $AdS_2 \times S^2$ spacetime.
| [
{
"created": "Mon, 11 Jun 2018 05:32:36 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Sep 2018 04:54:38 GMT",
"version": "v2"
}
] | 2018-11-14 | [
[
"Filyukov",
"Sergei",
""
]
] | It is shown that the near horizon geometry of a generic extreme regular black hole solution of Einstein gravity coupled to nonlinear electrodynamics is described by the $AdS_2 \times S^2$ spacetime. |
1901.07038 | Eliu Huerta | E. A. Huerta, Roland Haas, Sarah Habib, Anushri Gupta, Adam Rebei,
Vishnu Chavva, Daniel Johnson, Shawn Rosofsky, Erik Wessel, Bhanu Agarwal,
Diyu Luo and Wei Ren | Physics of eccentric binary black hole mergers: A numerical relativity
perspective | 11 pages, 5 figures, 2 appendices. A visualization of this numerical
relativity waveform catalog is available at
https://gravity.ncsa.illinois.edu/products/outreach/; v2: 13 pages, 5
figures, calculations for angular momentum emission and recoil velocities are
now included, references added. Accepted to Phys. R... | Phys. Rev. D 100, 064003 (2019) | 10.1103/PhysRevD.100.064003 | null | gr-qc astro-ph.CO astro-ph.HE cs.DC | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave observations of eccentric binary black hole mergers will
provide unequivocal evidence for the formation of these systems through
dynamical assembly in dense stellar environments. The study of these
astrophysically motivated sources is timely in view of electromagnetic
observations, consistent with ... | [
{
"created": "Mon, 21 Jan 2019 19:00:03 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Sep 2019 16:56:25 GMT",
"version": "v2"
}
] | 2019-09-06 | [
[
"Huerta",
"E. A.",
""
],
[
"Haas",
"Roland",
""
],
[
"Habib",
"Sarah",
""
],
[
"Gupta",
"Anushri",
""
],
[
"Rebei",
"Adam",
""
],
[
"Chavva",
"Vishnu",
""
],
[
"Johnson",
"Daniel",
""
],
[
"Rosofsky... | Gravitational wave observations of eccentric binary black hole mergers will provide unequivocal evidence for the formation of these systems through dynamical assembly in dense stellar environments. The study of these astrophysically motivated sources is timely in view of electromagnetic observations, consistent with th... |
gr-qc/0210096 | Larry Ford | L.H. Ford | What does Quantum Field Theory in Curved Spacetime Have to Say about the
Dark Energy? | 9 pages, IAP Colloquium "On the Nature of the Dark Energy", Paris
July 2002 | null | null | null | gr-qc astro-ph hep-th | null | The issue of the vacuum energy of quantum fields is briefly reviewed. It is
argued that this energy is normally either much too large or much too small to
account for the dark energy, However, there are a few proposals in which it
would be of the order needed to effect the dynamics of the present day
universe. Backre... | [
{
"created": "Mon, 28 Oct 2002 17:09:04 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ford",
"L. H.",
""
]
] | The issue of the vacuum energy of quantum fields is briefly reviewed. It is argued that this energy is normally either much too large or much too small to account for the dark energy, However, there are a few proposals in which it would be of the order needed to effect the dynamics of the present day universe. Backreac... |
1309.3279 | Radouane Gannouji | Apratim Ganguly, Radouane Gannouji, Rituparno Goswami and Subharthi
Ray | Neutron stars in Starobinsky model | 10 pages, 6 figures. Expanded discussion and references added,
results and conclusions unchanged. This version to appear in PRD | null | 10.1103/PhysRevD.89.064019 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the structure of neutron stars in $f(R)=R+\alpha R^{2}$ theory of
gravity (Starobinsky model), in an exact and non-perturbative approach. In this
model, apart from the standard General Relativistic junction conditions, two
extra conditions, namely the continuity of the curvature scalar and its first
derivati... | [
{
"created": "Thu, 12 Sep 2013 20:00:06 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Feb 2014 08:25:44 GMT",
"version": "v2"
}
] | 2014-05-01 | [
[
"Ganguly",
"Apratim",
""
],
[
"Gannouji",
"Radouane",
""
],
[
"Goswami",
"Rituparno",
""
],
[
"Ray",
"Subharthi",
""
]
] | We study the structure of neutron stars in $f(R)=R+\alpha R^{2}$ theory of gravity (Starobinsky model), in an exact and non-perturbative approach. In this model, apart from the standard General Relativistic junction conditions, two extra conditions, namely the continuity of the curvature scalar and its first derivative... |
1708.08346 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou, L. Sebastiani | Unification of Constant-roll Inflation and Dark Energy with Logarithmic
$R^2$-corrected and Exponential $F(R)$ Gravity | Nuclear Physics B accepted | null | 10.1016/j.nuclphysb.2017.08.018 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we investigate how to describe in a unified way a constant-roll
inflationary era with a dark energy era, by using the theoretical framework of
$F(R)$ gravity. To this end, we introduce some classes of appropriately chosen
$F(R)$ gravity models, and we examine in detail how the unification of early
and l... | [
{
"created": "Mon, 28 Aug 2017 14:39:34 GMT",
"version": "v1"
}
] | 2018-03-14 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
],
[
"Sebastiani",
"L.",
""
]
] | In this paper we investigate how to describe in a unified way a constant-roll inflationary era with a dark energy era, by using the theoretical framework of $F(R)$ gravity. To this end, we introduce some classes of appropriately chosen $F(R)$ gravity models, and we examine in detail how the unification of early and lat... |
1703.05831 | Andr\'e G. C. Guerra | Andr\'e G. C. Guerra, Frederico Francisco, Paulo J. S. Gil, Orfeu
Bertolami | Estimating the thermally induced acceleration of the New Horizons
spacecraft | 10 pages, 7 figures | Phys. Rev. D 95, 124027 (2017) | 10.1103/PhysRevD.95.124027 | null | gr-qc astro-ph.IM physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Residual accelerations due to thermal effects are estimated through a model
of the New Horizons spacecraft and a Monte Carlo simulation. We also discuss
and estimate the thermal effects on the attitude of the spacecraft. The work is
based on a method previously used for the Pioneer and Cassini probes, which
solve the... | [
{
"created": "Thu, 16 Mar 2017 21:36:45 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Nov 2017 15:49:36 GMT",
"version": "v2"
}
] | 2017-11-03 | [
[
"Guerra",
"André G. C.",
""
],
[
"Francisco",
"Frederico",
""
],
[
"Gil",
"Paulo J. S.",
""
],
[
"Bertolami",
"Orfeu",
""
]
] | Residual accelerations due to thermal effects are estimated through a model of the New Horizons spacecraft and a Monte Carlo simulation. We also discuss and estimate the thermal effects on the attitude of the spacecraft. The work is based on a method previously used for the Pioneer and Cassini probes, which solve the P... |
0711.0349 | Riccardo Sturani | Riccardo Sturani, Roberto Terenzi | Adaptive multiresolution for wavelet analysis | 8 pages, 4 figures. Proceeding of the 7th Edoardo Amaldi Conference
on Gravitational Waves, 8-14 July 2007, Sydney (Australia) | J.Phys.Conf.Ser.122:012036,2008 | 10.1088/1742-6596/122/1/012036 | null | gr-qc | null | We present a new method of wavelet packet decomposition to be used in
gravitational wave detection. An issue in wavelet analysis is what is the
time-frequency resolution which is best suited to analyze data when in quest of
a signal of unknown shape, like a burst. In the other wavelet methods currently
employed, like... | [
{
"created": "Fri, 2 Nov 2007 16:51:01 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Sturani",
"Riccardo",
""
],
[
"Terenzi",
"Roberto",
""
]
] | We present a new method of wavelet packet decomposition to be used in gravitational wave detection. An issue in wavelet analysis is what is the time-frequency resolution which is best suited to analyze data when in quest of a signal of unknown shape, like a burst. In the other wavelet methods currently employed, like L... |
2202.10864 | Paul Tod | Paul Tod | Some questions about Conformal Cyclic Cosmology | 8 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article is an extended version of a talk given in Oxford in June 2021 as
part of an online meeting `Ninety minutes of CCC' to mark the 90th birthday of
Sir Roger Penrose. I assemble some questions that I have been asked or have
asked myself about CCC.
| [
{
"created": "Tue, 22 Feb 2022 12:50:15 GMT",
"version": "v1"
}
] | 2022-02-23 | [
[
"Tod",
"Paul",
""
]
] | This article is an extended version of a talk given in Oxford in June 2021 as part of an online meeting `Ninety minutes of CCC' to mark the 90th birthday of Sir Roger Penrose. I assemble some questions that I have been asked or have asked myself about CCC. |
1012.5052 | Francisco Navarro-Lerida | Masoud Allahverdizadeh, Jutta Kunz, and Francisco Navarro-Lerida | Charged Rotating Black Holes in Higher Dimensions | 4 pages, 2 figures, to appear in Proceedings of Spanish Relativity
Meeting 2010 (ERE 2010) held in Granada, Spain | null | 10.1088/1742-6596/314/1/012109 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent years higher-dimensional black holes have attracted much interest
because of various developments in gravity and high energy physics. But whereas
higher-dimensional charged static (Tangherlini) and uncharged rotating
(Myers-Perry) black holes were found long ago, black hole solutions of
Einstein-Maxwell the... | [
{
"created": "Wed, 22 Dec 2010 17:43:41 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Allahverdizadeh",
"Masoud",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Navarro-Lerida",
"Francisco",
""
]
] | In recent years higher-dimensional black holes have attracted much interest because of various developments in gravity and high energy physics. But whereas higher-dimensional charged static (Tangherlini) and uncharged rotating (Myers-Perry) black holes were found long ago, black hole solutions of Einstein-Maxwell theor... |
0910.1715 | Tom Shiokawa | K. Shiokawa | Quantum Teleportation with an Accelerated Observer and Black Hole
Information | 35 pages, 12 figures | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nonperturbative analysis of quantum entanglement and quantum teleportation
protocol using oscillator variables carried by observers in relativistic motion
under the continuous influence of the environment is given. The full time
evolution of quantum entanglement among static and accelerated observers is
studied. The ... | [
{
"created": "Fri, 9 Oct 2009 13:12:59 GMT",
"version": "v1"
}
] | 2009-10-14 | [
[
"Shiokawa",
"K.",
""
]
] | Nonperturbative analysis of quantum entanglement and quantum teleportation protocol using oscillator variables carried by observers in relativistic motion under the continuous influence of the environment is given. The full time evolution of quantum entanglement among static and accelerated observers is studied. The en... |
gr-qc/9611067 | null | A. Borowiec, M. Ferraris, M. Francaviglia and I. Volovich | Universality of Einstein Equations for the Ricci Squared Lagrangians | 21 pages, Latex | Class.Quant.Grav.15:43-55,1998 | 10.1088/0264-9381/15/1/005 | TO-JLL-P 6/96 | gr-qc hep-th | null | It has been recently shown that, in the first order (Palatini) formalism,
there is universality of Einstein equations and Komar energy-momentum complex,
in the sense that for a generic nonlinear Lagrangian depending only on the
scalar curvature of a metric and a torsionless connection one always gets
Einstein equatio... | [
{
"created": "Thu, 28 Nov 1996 12:09:32 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Borowiec",
"A.",
""
],
[
"Ferraris",
"M.",
""
],
[
"Francaviglia",
"M.",
""
],
[
"Volovich",
"I.",
""
]
] | It has been recently shown that, in the first order (Palatini) formalism, there is universality of Einstein equations and Komar energy-momentum complex, in the sense that for a generic nonlinear Lagrangian depending only on the scalar curvature of a metric and a torsionless connection one always gets Einstein equations... |
gr-qc/9508065 | Carmen Chicone | C. Chicone, B. Mashhoon and D. Retzloff | Gravitational Ionization: Periodic Orbits of Binary Systems Perturbed by
Gravitational Radiation | ps file, 35 pages | Annales Poincare Phys.Theor. 64 (1996) 87-125 | null | null | gr-qc chao-dyn nlin.CD | null | The long term perturbation of a Newtonian binary system by an incident
gravitational wave is discussed in connection with the issue of gravitational
ionization. The periodic orbits of the planar tidal equation are investigated
and the conditions for their existence are presented. The possibility of
ionization of a Ke... | [
{
"created": "Thu, 31 Aug 1995 21:49:38 GMT",
"version": "v1"
}
] | 2008-02-03 | [
[
"Chicone",
"C.",
""
],
[
"Mashhoon",
"B.",
""
],
[
"Retzloff",
"D.",
""
]
] | The long term perturbation of a Newtonian binary system by an incident gravitational wave is discussed in connection with the issue of gravitational ionization. The periodic orbits of the planar tidal equation are investigated and the conditions for their existence are presented. The possibility of ionization of a Kepl... |
1102.0999 | Ivan Booth | Terry Pilkington, Alexandre Melanson, Joseph Fitzgerald, Ivan Booth | Trapped and marginally trapped surfaces in Weyl-distorted Schwarzschild
solutions | The results are unchanged but this version supersedes that published
in CQG. The major change is a rewriting of Section 3.1 to improve clarity and
correct an error in the general expression for V(r,\theta). Several minor
errors are also fixed - most significantly an incorrect statement made in the
introduction ... | Class.Quant.Grav.28:125018,2011 | 10.1088/0264-9381/28/12/125018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To better understand the allowed range of black hole geometries, we study
Weyl-distorted Schwarzschild solutions. They always contain trapped surfaces, a
singularity and an isolated horizon and so should be understood to be
(geometric) black holes. However we show that for large distortions the
isolated horizon is ne... | [
{
"created": "Fri, 4 Feb 2011 19:33:33 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jul 2011 11:52:35 GMT",
"version": "v2"
}
] | 2015-03-18 | [
[
"Pilkington",
"Terry",
""
],
[
"Melanson",
"Alexandre",
""
],
[
"Fitzgerald",
"Joseph",
""
],
[
"Booth",
"Ivan",
""
]
] | To better understand the allowed range of black hole geometries, we study Weyl-distorted Schwarzschild solutions. They always contain trapped surfaces, a singularity and an isolated horizon and so should be understood to be (geometric) black holes. However we show that for large distortions the isolated horizon is neit... |
1705.05928 | Roman Konoplya | R. A. Konoplya and Z. Stuchl\'ik | Are eikonal quasinormal modes linked to the unstable circular null
geodesics? | 8 pages, revtex, refereed version, accepted for publication in
Physics Letters B | null | 10.1016/j.physletb.2017.06.015 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Phys. Rev. D 79, 064016 (2009) it was claimed that quasinormal modes which
any stationary, spherically symmetric and asymptotically flat black hole emits
in the eikonal regime are determined by the parameters of the circular null
geodesic: the real and imaginary parts of the quasinormal mode are multiples of
the f... | [
{
"created": "Tue, 16 May 2017 21:35:48 GMT",
"version": "v1"
},
{
"created": "Fri, 19 May 2017 21:09:47 GMT",
"version": "v2"
},
{
"created": "Thu, 1 Jun 2017 22:35:22 GMT",
"version": "v3"
}
] | 2017-06-23 | [
[
"Konoplya",
"R. A.",
""
],
[
"Stuchlík",
"Z.",
""
]
] | In Phys. Rev. D 79, 064016 (2009) it was claimed that quasinormal modes which any stationary, spherically symmetric and asymptotically flat black hole emits in the eikonal regime are determined by the parameters of the circular null geodesic: the real and imaginary parts of the quasinormal mode are multiples of the fre... |
1605.04189 | Oleg Tsupko | O.Yu. Tsupko, G.S. Bisnovatyi-Kogan and P.I. Jefremov | Parameters of Innermost Stable Circular Orbits of Spinning Test
Particles: Numerical and Analytical Calculations | Paper is written for special issue of the journal dedicated to the
centenary of Prof. K.P. Staniukovich. Some results of our previous paper
arXiv:1503.07060 are used | Gravitation and Cosmology, 22, 138-147 (2016) | 10.1134/S0202289316020158 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The motion of classical spinning test particles in the equatorial plane of a
Kerr black hole is considered for the case where the particle spin is
perpendicular to the equatorial plane. We review some results of our recent
research of the innermost stable circular orbits (ISCO) [P.I. Jefremov, O.Yu.
Tsupko and G.S. B... | [
{
"created": "Fri, 13 May 2016 14:23:59 GMT",
"version": "v1"
}
] | 2016-05-16 | [
[
"Tsupko",
"O. Yu.",
""
],
[
"Bisnovatyi-Kogan",
"G. S.",
""
],
[
"Jefremov",
"P. I.",
""
]
] | The motion of classical spinning test particles in the equatorial plane of a Kerr black hole is considered for the case where the particle spin is perpendicular to the equatorial plane. We review some results of our recent research of the innermost stable circular orbits (ISCO) [P.I. Jefremov, O.Yu. Tsupko and G.S. Bis... |
0710.0752 | Christian Boehmer | Christian G. Boehmer, Luca Fabbri | The Einstein-Yang-Mills equations from Bianchi identities | 5 pages; typos corrected in Eq. (30) and Eq. (34) | Mod.Phys.Lett.A22:2727-2735,2007 | 10.1142/S0217732307025807 | null | gr-qc hep-th | null | We suggest a novel extension to the Kaluza-Klein scheme that allows us to
obtain consistently all SU(n) Einstein-Yang-Mills theories. This construction
is based on allowing the five-dimensional spacetime to carry some non-vanishing
torsion; however, the four-dimensional spacetime remains intrinsically
torsion-free.
| [
{
"created": "Wed, 3 Oct 2007 09:56:55 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Oct 2007 18:35:47 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Boehmer",
"Christian G.",
""
],
[
"Fabbri",
"Luca",
""
]
] | We suggest a novel extension to the Kaluza-Klein scheme that allows us to obtain consistently all SU(n) Einstein-Yang-Mills theories. This construction is based on allowing the five-dimensional spacetime to carry some non-vanishing torsion; however, the four-dimensional spacetime remains intrinsically torsion-free. |
1903.04356 | Alejandro Cardenas Avendano | Alejandro Cardenas-Avendano, Jaxen Godfrey, Nicolas Yunes, Anne
Lohfink | Experimental Relativity with Accretion Disk Observations | 10+1 pages, 6 figures, Published in PRD | Phys. Rev. D 100, 024039 (2019) | 10.1103/PhysRevD.100.024039 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Electromagnetic observations have been used over the past decades to
understand the nature of black holes and the material around them. Our ability
to learn about the fundamental physics relies on our understanding of two key
ingredients in the modeling of these electromagnetic observations: the gravity
theory that d... | [
{
"created": "Thu, 7 Mar 2019 22:12:32 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jul 2019 08:02:44 GMT",
"version": "v2"
}
] | 2019-07-24 | [
[
"Cardenas-Avendano",
"Alejandro",
""
],
[
"Godfrey",
"Jaxen",
""
],
[
"Yunes",
"Nicolas",
""
],
[
"Lohfink",
"Anne",
""
]
] | Electromagnetic observations have been used over the past decades to understand the nature of black holes and the material around them. Our ability to learn about the fundamental physics relies on our understanding of two key ingredients in the modeling of these electromagnetic observations: the gravity theory that des... |
1206.4388 | Michael Maziashvili | Michael Maziashvili | Field propagation in a stochastic background space: The rate of light
incoherence in stellar interferometry | 6 pages, Version to appear in Phys. Rev. D | Phys. Rev. D 86 (2012) 104066 | 10.1103/PhysRevD.86.104066 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present Hilbert space representation for a relatively broad class of
minimum-length deformed quantum mechanical models obtained by incorporating a
space-time uncertainty relation into quantum mechanics. The correspondingly
modified field theory is used for estimating the deviation of the light
incoherence rate fro... | [
{
"created": "Wed, 20 Jun 2012 05:42:38 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Nov 2012 13:13:28 GMT",
"version": "v2"
}
] | 2012-11-30 | [
[
"Maziashvili",
"Michael",
""
]
] | We present Hilbert space representation for a relatively broad class of minimum-length deformed quantum mechanical models obtained by incorporating a space-time uncertainty relation into quantum mechanics. The correspondingly modified field theory is used for estimating the deviation of the light incoherence rate from ... |
gr-qc/0703008 | Claus Kiefer | C. Kiefer, J. Mueller-Hill, T. P. Singh, C. Vaz | Hawking radiation from the quantum Lemaitre-Tolman-Bondi model | 14 pages | Phys.Rev.D75:124010,2007 | 10.1103/PhysRevD.75.124010 | null | gr-qc astro-ph hep-th | null | In an earlier paper, we obtained exact solutions of the Wheeler-DeWitt
equation for the Lemaitre-Tolman-Bondi (LTB) model of gravitational collapse,
employing a lattice regularization. In this paper, we derive Hawking radiation
in non-marginally bound models from our exact solutions. We show that a
non-vanishing ener... | [
{
"created": "Thu, 1 Mar 2007 14:45:37 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Kiefer",
"C.",
""
],
[
"Mueller-Hill",
"J.",
""
],
[
"Singh",
"T. P.",
""
],
[
"Vaz",
"C.",
""
]
] | In an earlier paper, we obtained exact solutions of the Wheeler-DeWitt equation for the Lemaitre-Tolman-Bondi (LTB) model of gravitational collapse, employing a lattice regularization. In this paper, we derive Hawking radiation in non-marginally bound models from our exact solutions. We show that a non-vanishing energy... |
2211.12957 | Zhong-Ying Fan | Zhong-Ying Fan | Topological interpretation for phase transitions of black holes | 5pages, 4figures | null | 10.1103/PhysRevD.107.044026 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work, we develop a universal picture from topology in the
thermodynamic parameters space to describe first order phase transitions of
black holes. By employing an off-shell internal energy, we find two types of
topological defects. The first is normal, describing black holes which move
with a nonzero velocity... | [
{
"created": "Wed, 23 Nov 2022 14:00:41 GMT",
"version": "v1"
},
{
"created": "Sun, 27 Nov 2022 07:47:38 GMT",
"version": "v2"
}
] | 2023-02-22 | [
[
"Fan",
"Zhong-Ying",
""
]
] | In this work, we develop a universal picture from topology in the thermodynamic parameters space to describe first order phase transitions of black holes. By employing an off-shell internal energy, we find two types of topological defects. The first is normal, describing black holes which move with a nonzero velocity a... |
gr-qc/9510044 | Henk van Elst | Henk van Elst and George F R Ellis | The Covariant Approach to LRS Perfect Fluid Spacetime Geometries | 25 pages, uuencoded/compressed postscript file | Class.Quant.Grav. 13 (1996) 1099-1128 | 10.1088/0264-9381/13/5/023 | UCT/QMW preprint, 1995 | gr-qc astro-ph | null | The dynamics of perfect fluid spacetime geometries which exhibit {\em Local
Rotational Symmetry} (LRS) are reformulated in the language of a $1+\,3$
"threading" decomposition of the spacetime manifold, where covariant fluid and
curvature variables are used. This approach presents a neat alternative to the
orthonormal... | [
{
"created": "Mon, 23 Oct 1995 10:53:14 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"van Elst",
"Henk",
""
],
[
"Ellis",
"George F R",
""
]
] | The dynamics of perfect fluid spacetime geometries which exhibit {\em Local Rotational Symmetry} (LRS) are reformulated in the language of a $1+\,3$ "threading" decomposition of the spacetime manifold, where covariant fluid and curvature variables are used. This approach presents a neat alternative to the orthonormal f... |
gr-qc/0207102 | Ronald W. Hellings | Ronald W. Hellings (Montana State University) and Thomas A. Moore
(Pomona College) | The information content of gravitational wave harmonics in compact
binary inspiral | 13 pages, 5 figures | Class.Quant.Grav. 20 (2003) S181-S192 | 10.1088/0264-9381/20/10/321 | null | gr-qc | null | The nonlinear aspect of gravitational wave generation that produces power at
harmonics of the orbital frequency, above the fundamental quadrupole frequency,
is examined to see what information about the source is contained in these
higher harmonics. We use an order (4/2) post-Newtonian expansion of the
gravitational ... | [
{
"created": "Thu, 25 Jul 2002 22:23:44 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Hellings",
"Ronald W.",
"",
"Montana State University"
],
[
"Moore",
"Thomas A.",
"",
"Pomona College"
]
] | The nonlinear aspect of gravitational wave generation that produces power at harmonics of the orbital frequency, above the fundamental quadrupole frequency, is examined to see what information about the source is contained in these higher harmonics. We use an order (4/2) post-Newtonian expansion of the gravitational wa... |
0903.3555 | Alexander Zhidenko | Alexander Zhidenko | Linear perturbations of black holes: stability, quasi-normal modes and
tails | PhD thesis, IFUSP, Sao Paulo, May 12, 2009, 100 pages, PDFLaTex,
English and Portuguese versions | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes have their proper oscillations, which are called the quasi-normal
modes. The proper oscillations of astrophysical black holes can be observed in
the nearest future with the help of gravitational wave detectors. Quasi-normal
modes are also very important in the context of testing of the stability of
black ... | [
{
"created": "Fri, 20 Mar 2009 15:02:35 GMT",
"version": "v1"
},
{
"created": "Tue, 26 May 2009 17:27:28 GMT",
"version": "v2"
}
] | 2009-05-26 | [
[
"Zhidenko",
"Alexander",
""
]
] | Black holes have their proper oscillations, which are called the quasi-normal modes. The proper oscillations of astrophysical black holes can be observed in the nearest future with the help of gravitational wave detectors. Quasi-normal modes are also very important in the context of testing of the stability of black ob... |
gr-qc/0008067 | Bernd Bruegmann | Miguel Alcubierre and Bernd Bruegmann | Simple excision of a black hole in 3+1 numerical relativity | 7 pages, 7 figures, revtex. Incorporates comments made by referee | Phys.Rev.D63:104006,2001 | 10.1103/PhysRevD.63.104006 | AEI-2000-034 | gr-qc | null | We describe a simple implementation of black hole excision in 3+1 numerical
relativity. We apply this technique to a Schwarzschild black hole with octant
symmetry in Eddington-Finkelstein coordinates and show how one can obtain
accurate, long-term stable numerical evolutions.
| [
{
"created": "Mon, 28 Aug 2000 07:44:24 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Mar 2001 09:01:40 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Alcubierre",
"Miguel",
""
],
[
"Bruegmann",
"Bernd",
""
]
] | We describe a simple implementation of black hole excision in 3+1 numerical relativity. We apply this technique to a Schwarzschild black hole with octant symmetry in Eddington-Finkelstein coordinates and show how one can obtain accurate, long-term stable numerical evolutions. |
1605.03834 | Jurgen Mifsud | Carsten van de Bruck, Jurgen Mifsud, Jos\'e P. Mimoso, Nelson J. Nunes | Generalized dark energy interactions with multiple fluids | 45 pages, 11 figures | null | 10.1088/1475-7516/2016/11/031 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the search for an explanation for the current acceleration of the
Universe, scalar fields are the most simple and useful tools to build models of
dark energy. This field, however, must in principle couple with the rest of the
world and not necessarily in the same way to different particles or fluids. We
provide th... | [
{
"created": "Thu, 12 May 2016 14:39:28 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Nov 2016 10:59:40 GMT",
"version": "v2"
}
] | 2016-11-18 | [
[
"van de Bruck",
"Carsten",
""
],
[
"Mifsud",
"Jurgen",
""
],
[
"Mimoso",
"José P.",
""
],
[
"Nunes",
"Nelson J.",
""
]
] | In the search for an explanation for the current acceleration of the Universe, scalar fields are the most simple and useful tools to build models of dark energy. This field, however, must in principle couple with the rest of the world and not necessarily in the same way to different particles or fluids. We provide the ... |
1704.04196 | Flavio Mercati | Flavio Mercati | Thin shells of dust in a compact universe | 23 pages + 8 pages of appendices | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I present the first analytical study of gravitational collapse in a compact
CMC foliation with $S^3$ spatial topology. The solutions I find, in this
context, will be both solutions of Shape Dynamics and General Relativity. The
aim is to describe a system undergoing gravitational collapse in Shape
Dynamics, so a well-... | [
{
"created": "Thu, 13 Apr 2017 16:18:08 GMT",
"version": "v1"
}
] | 2017-04-14 | [
[
"Mercati",
"Flavio",
""
]
] | I present the first analytical study of gravitational collapse in a compact CMC foliation with $S^3$ spatial topology. The solutions I find, in this context, will be both solutions of Shape Dynamics and General Relativity. The aim is to describe a system undergoing gravitational collapse in Shape Dynamics, so a well-ju... |
1203.2962 | Rafael Porto | Rafael A. Porto, Andreas Ross, Ira Z. Rothstein | Spin induced multipole moments for the gravitational wave amplitude from
binary inspirals to 2.5 Post-Newtonian order | 17 pages, 4 figures. v2 Minor changes, to appear in JCAP | null | 10.1088/1475-7516/2012/09/028 | null | gr-qc astro-ph.CO astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the NRGR effective field theory formalism we calculate the remaining
source multipole moments necessary to obtain the spin contributions to the
gravitational wave amplitude to 2.5 Post-Newtonian (PN) order. We also
reproduce the tail contribution to the waveform linear in spin at 2.5PN arising
from the nonlinea... | [
{
"created": "Tue, 13 Mar 2012 21:55:10 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Aug 2012 11:51:36 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Porto",
"Rafael A.",
""
],
[
"Ross",
"Andreas",
""
],
[
"Rothstein",
"Ira Z.",
""
]
] | Using the NRGR effective field theory formalism we calculate the remaining source multipole moments necessary to obtain the spin contributions to the gravitational wave amplitude to 2.5 Post-Newtonian (PN) order. We also reproduce the tail contribution to the waveform linear in spin at 2.5PN arising from the nonlinear ... |
1311.6456 | Juan Pablo Cruz P\'erez | Cruz P\'erez Juan Pablo, Gonz\'alez Cervera Jos\'e Antonio | Initial data for general relativistic SPH with Centroidal Voronoi
Tessellations | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we present an alternative method to obtain a distribution of
particles over an hyper surface, such that they obey a rest-mass density
distribution $\rho(x^i)$. We use density profiles that can be written as
$\rho(x^1,x^2,x^3)=\rho(x^1) \rho(x^2) \rho(x^3)$ in order to be able to use
them as a probability... | [
{
"created": "Mon, 25 Nov 2013 20:48:52 GMT",
"version": "v1"
}
] | 2013-11-26 | [
[
"Pablo",
"Cruz Pérez Juan",
""
],
[
"Antonio",
"González Cervera José",
""
]
] | In this work we present an alternative method to obtain a distribution of particles over an hyper surface, such that they obey a rest-mass density distribution $\rho(x^i)$. We use density profiles that can be written as $\rho(x^1,x^2,x^3)=\rho(x^1) \rho(x^2) \rho(x^3)$ in order to be able to use them as a probability d... |
1811.10838 | C L Ahmed Rizwan | C.L. Ahmed Rizwan, A. Naveena Kumara, K.V. Rajani, Deepak Vaid. and
K.M. Ajith | Effect of Dark Energy in Geometrothermodynamics and Phase Transitions of
Regular Bardeen AdS Black Hole | 20 pages,12 figures | General Relativity and Gravitation 2019 51,161 (2019) | 10.1007/s10714-019-2649-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate thermodynamics and geometrothermodynamics of regular Bardeen
AdS black hole with quintessence. The thermodynamics of the black hole is
studied using temperature-entropy ($T-S$) , Pressure-Volume ($P-v$), and Gibbs
energy plots, which indicate a critical behaviour.This is also confirmed from
the diverge... | [
{
"created": "Tue, 27 Nov 2018 06:40:08 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Feb 2019 20:07:01 GMT",
"version": "v2"
},
{
"created": "Tue, 24 Aug 2021 08:24:34 GMT",
"version": "v3"
}
] | 2021-08-25 | [
[
"Rizwan",
"C. L. Ahmed",
""
],
[
"Kumara",
"A. Naveena",
""
],
[
"Rajani",
"K. V.",
""
],
[
"Vaid.",
"Deepak",
""
],
[
"Ajith",
"K. M.",
""
]
] | We investigate thermodynamics and geometrothermodynamics of regular Bardeen AdS black hole with quintessence. The thermodynamics of the black hole is studied using temperature-entropy ($T-S$) , Pressure-Volume ($P-v$), and Gibbs energy plots, which indicate a critical behaviour.This is also confirmed from the divergenc... |
2301.00956 | Balendra Pratap Singh | Balendra Pratap Singh | Shadows of quintessential dark energy black holes in the domain of outer
communication | 22 pages, 10 figures, 4 Tables. Welcome for comments | null | null | null | gr-qc astro-ph.CO astro-ph.HE | http://creativecommons.org/licenses/by-sa/4.0/ | The rotating black holes in the quintessential dark energy correspond to
three horizons: inner, outer, and quintessential horizon. The domain of outer
communication is the region between outer and quintessential horizon. Here, in
this work we study the photon region and shadows of the quintessential dark
energy black... | [
{
"created": "Tue, 3 Jan 2023 05:42:32 GMT",
"version": "v1"
}
] | 2023-01-04 | [
[
"Singh",
"Balendra Pratap",
""
]
] | The rotating black holes in the quintessential dark energy correspond to three horizons: inner, outer, and quintessential horizon. The domain of outer communication is the region between outer and quintessential horizon. Here, in this work we study the photon region and shadows of the quintessential dark energy black h... |
1701.04775 | Giuseppe Congedo | Giuseppe Congedo | Detection principle of gravitational wave detectors | 12 pages, proceedings of the "Fifth Joint Italian-Pakistani Workshop
on Relativistic Astrophysics", 21-23 July 2016, Lecce, Italy | Int. J. Mod. Phys. D, 26, 1741022 (2017) | 10.1142/S021827181741022X | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the first two detections in late 2015, astrophysics has officially
entered into the new era of gravitational wave observations. Since then, much
has been going on in the field with a lot of work focussing on the observations
and implications for astrophysics and tests of general relativity in the strong
regime. ... | [
{
"created": "Tue, 17 Jan 2017 17:22:55 GMT",
"version": "v1"
}
] | 2017-04-27 | [
[
"Congedo",
"Giuseppe",
""
]
] | With the first two detections in late 2015, astrophysics has officially entered into the new era of gravitational wave observations. Since then, much has been going on in the field with a lot of work focussing on the observations and implications for astrophysics and tests of general relativity in the strong regime. Ho... |
1612.08640 | Gerard Hooft 't | Gerard t Hooft | The firewall transformation for black holes and some of its implications | 45 pages (inc. title page), 5 figures. Version 3: some further
corrections made and clarifications added. Final version to be published | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A promising strategy for better understanding space and time at the Planck
scale, is outlined and further pursued. It is explained in detail, how black
hole unitarity demands the existence of transformations that can remove
firewalls. This must then be combined with a continuity condition on the
horizon, with antipod... | [
{
"created": "Tue, 27 Dec 2016 14:14:31 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Apr 2017 11:56:47 GMT",
"version": "v2"
},
{
"created": "Fri, 8 Sep 2017 22:26:59 GMT",
"version": "v3"
}
] | 2017-09-12 | [
[
"Hooft",
"Gerard t",
""
]
] | A promising strategy for better understanding space and time at the Planck scale, is outlined and further pursued. It is explained in detail, how black hole unitarity demands the existence of transformations that can remove firewalls. This must then be combined with a continuity condition on the horizon, with antipodal... |
1107.2981 | Natalia Kiriushcheva | N. Kiriushcheva, P.G. Komorowski and S.V. Kuzmin | Comment on `Hamiltonian formulation for the theory of gravity and
canonical transformations in extended phase space' by T P Shestakova | 7 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that the conclusion, `we cannot consider the Dirac approach as
fundamental and undoubted', made in the paper by Shestakova (Class. Quantum
Grav. 28 055009, 2011), is based upon an incomplete and flawed analysis of the
simple model presented in section 3 of the article. We re-examine the analysis
of this mode... | [
{
"created": "Fri, 15 Jul 2011 02:02:48 GMT",
"version": "v1"
}
] | 2011-07-18 | [
[
"Kiriushcheva",
"N.",
""
],
[
"Komorowski",
"P. G.",
""
],
[
"Kuzmin",
"S. V.",
""
]
] | We argue that the conclusion, `we cannot consider the Dirac approach as fundamental and undoubted', made in the paper by Shestakova (Class. Quantum Grav. 28 055009, 2011), is based upon an incomplete and flawed analysis of the simple model presented in section 3 of the article. We re-examine the analysis of this model ... |
2106.15551 | Mahnaz Asghari | Mahnaz Asghari and Ahmad Sheykhi | Observational constraints on Tsallis modified gravity | 8 pages, 4 figures, Accepted for publication in MNRAS | Monthly Notices of the Royal Astronomical Society 508,
2855-2861(2021) | 10.1093/mnras/stab2671 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The thermodynamics-gravity conjecture reveals that one can derive the
gravitational field equations by using the first law of thermodynamics and vice
versa. Considering the entropy associated with the horizon in the form of
non-extensive Tsallis entropy, $S\sim A^{\beta}$ here we first derive the
corresponding gravit... | [
{
"created": "Tue, 29 Jun 2021 16:38:41 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Jul 2021 14:48:32 GMT",
"version": "v2"
},
{
"created": "Tue, 14 Sep 2021 15:31:03 GMT",
"version": "v3"
}
] | 2021-11-04 | [
[
"Asghari",
"Mahnaz",
""
],
[
"Sheykhi",
"Ahmad",
""
]
] | The thermodynamics-gravity conjecture reveals that one can derive the gravitational field equations by using the first law of thermodynamics and vice versa. Considering the entropy associated with the horizon in the form of non-extensive Tsallis entropy, $S\sim A^{\beta}$ here we first derive the corresponding gravitat... |
gr-qc/0410060 | Fangyu Li | Fang-Yu Li, Nan Yang | Resonant Interaction Between a Weak Gravitational Wave and a Microwave
Beam in the Double Polarized States Through a Static Magnetic Field | 10pages | Chin.Phys.Lett.21:2113-2116,2004 | 10.1088/0256-307X/21/11/011 | null | gr-qc | null | We investigate the resonant interaction to the weak gravitational waves in a
coupling electromagnetic system, which consists of a Gaussian beam with the
double polarized transverse electric modes, a static magnetic field and the
fractal membranes. We find that under the syncroresonance condition a
high-frequency GW (... | [
{
"created": "Thu, 14 Oct 2004 03:10:11 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Li",
"Fang-Yu",
""
],
[
"Yang",
"Nan",
""
]
] | We investigate the resonant interaction to the weak gravitational waves in a coupling electromagnetic system, which consists of a Gaussian beam with the double polarized transverse electric modes, a static magnetic field and the fractal membranes. We find that under the syncroresonance condition a high-frequency GW (HF... |
2002.01770 | Patryk Mach | Piotr Bizo\'n, Tadeusz Chmaj, Patryk Mach | A toy model of hyperboloidal approach to quasinormal modes | 7 pages, 1 figure | null | 10.5506/APhysPolB.51.1007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a scalar field propagating in the static region of the two
dimensional de Sitter space. This simple system is used to illustrate the
advantages of hyperboloidal foliations in the analysis of quasinormal modes.
| [
{
"created": "Wed, 5 Feb 2020 13:09:21 GMT",
"version": "v1"
}
] | 2020-06-24 | [
[
"Bizoń",
"Piotr",
""
],
[
"Chmaj",
"Tadeusz",
""
],
[
"Mach",
"Patryk",
""
]
] | We consider a scalar field propagating in the static region of the two dimensional de Sitter space. This simple system is used to illustrate the advantages of hyperboloidal foliations in the analysis of quasinormal modes. |
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