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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1707.06405 | Yoshiaki Ohkuwa | Yoshiaki Ohkuwa, Mir Faizal, Yasuo Ezawa | Virtual Black Holes in a Third Quantized Formalism | 15pages, no figures, Accepted in Annals of Physics | Annals Phys. 384, 105 (2017) | 10.1016/j.aop.2017.06.020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we will analyse virtual black holes using the third
quantization formalism. As the virtual black hole model depends critically on
the assumption that the quantum fluctuations dominate the geometry of spacetime
at Planck scale, we will analyse the quantum fluctuations for a black hole
using third quanti... | [
{
"created": "Thu, 20 Jul 2017 07:52:24 GMT",
"version": "v1"
}
] | 2017-07-27 | [
[
"Ohkuwa",
"Yoshiaki",
""
],
[
"Faizal",
"Mir",
""
],
[
"Ezawa",
"Yasuo",
""
]
] | In this paper, we will analyse virtual black holes using the third quantization formalism. As the virtual black hole model depends critically on the assumption that the quantum fluctuations dominate the geometry of spacetime at Planck scale, we will analyse the quantum fluctuations for a black hole using third quantiza... |
1809.05047 | Eleni-Alexandra Kontou | Christopher J. Fewster and Eleni-Alexandra Kontou | Quantum strong energy inequalities | 27 pages | Phys. Rev. D 99, 045001 (2019) | 10.1103/PhysRevD.99.045001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum energy inequalities (QEIs) express restrictions on the extent to
which weighted averages of the renormalized energy density can take negative
expectation values within a quantum field theory. Here we derive, for the first
time, QEIs for the effective energy density (EED) for the quantized
non-minimally couple... | [
{
"created": "Thu, 13 Sep 2018 16:26:50 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Feb 2019 13:21:30 GMT",
"version": "v2"
}
] | 2019-02-13 | [
[
"Fewster",
"Christopher J.",
""
],
[
"Kontou",
"Eleni-Alexandra",
""
]
] | Quantum energy inequalities (QEIs) express restrictions on the extent to which weighted averages of the renormalized energy density can take negative expectation values within a quantum field theory. Here we derive, for the first time, QEIs for the effective energy density (EED) for the quantized non-minimally coupled ... |
2305.08257 | Siddharth Soni | Siddharth Soni, Ethan Marx, Erik Katsavounidis, Reed Essick, G. S.
Cabourn Davies, Patrick Brockill, Michael W. Coughlin, Shaon Ghosh, Patrick
Godwin | QoQ: a Q-transform based test for Gravitational Wave transient events | 39 Figures, 5 Tables | null | null | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | The observation of transient gravitational waves is hindered by the presence
of transient noise, colloquially referred to as glitches. These glitches can
often be misidentified as gravitational waves by searches for unmodeled
transients using the excess-power type of methods and sometimes even excite
template wavefor... | [
{
"created": "Sun, 14 May 2023 21:37:53 GMT",
"version": "v1"
}
] | 2023-05-16 | [
[
"Soni",
"Siddharth",
""
],
[
"Marx",
"Ethan",
""
],
[
"Katsavounidis",
"Erik",
""
],
[
"Essick",
"Reed",
""
],
[
"Davies",
"G. S. Cabourn",
""
],
[
"Brockill",
"Patrick",
""
],
[
"Coughlin",
"Michael W.",
"... | The observation of transient gravitational waves is hindered by the presence of transient noise, colloquially referred to as glitches. These glitches can often be misidentified as gravitational waves by searches for unmodeled transients using the excess-power type of methods and sometimes even excite template waveforms... |
2010.10312 | Callum Hunter | Callum L Hunter and Douglas J Smith | Novel Hairy Black Hole Solutions in Einstein-Maxwell-Gauss-Bonnet-Scalar
Theory | 30 pages, 11 figures | International Journal of Modern Physics A - Vol. 37, No. 09,
2250045 (2022) | 10.1142/S0217751X22500452 | DCPT-20/17 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been previously shown that a Gauss-Bonnet term non-minimally coupled
to a scalar field produces a scalarised black hole solution, which can be
considered as having secondary scalar hair, parametrised in terms of the black
hole's mass and charge. In this paper we extend a previously investigated
linear coupling... | [
{
"created": "Tue, 20 Oct 2020 14:22:18 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Jun 2021 19:53:44 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Mar 2022 16:45:24 GMT",
"version": "v3"
}
] | 2022-05-18 | [
[
"Hunter",
"Callum L",
""
],
[
"Smith",
"Douglas J",
""
]
] | It has been previously shown that a Gauss-Bonnet term non-minimally coupled to a scalar field produces a scalarised black hole solution, which can be considered as having secondary scalar hair, parametrised in terms of the black hole's mass and charge. In this paper we extend a previously investigated linear coupling o... |
1611.09275 | Eloisa Bentivegna | Eloisa Bentivegna, Miko{\l}aj Korzy\'nski, Ian Hinder, Daniel
Gerlicher | Light propagation through black-hole lattices | 32 pages, 10 figures, matches published version | Journal of Cosmology and Astroparticle Physics, 1703, 014 (2017) | 10.1088/1475-7516/2017/03/014 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The apparent properties of distant objects encode information about the way
the light they emit propagates to an observer, and therefore about the
curvature of the underlying spacetime. Measuring the relationship between the
redshift $z$ and the luminosity distance $D_{\rm L}$ of a standard candle, for
example, yield... | [
{
"created": "Mon, 28 Nov 2016 18:32:31 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Oct 2017 20:59:22 GMT",
"version": "v2"
}
] | 2017-10-19 | [
[
"Bentivegna",
"Eloisa",
""
],
[
"Korzyński",
"Mikołaj",
""
],
[
"Hinder",
"Ian",
""
],
[
"Gerlicher",
"Daniel",
""
]
] | The apparent properties of distant objects encode information about the way the light they emit propagates to an observer, and therefore about the curvature of the underlying spacetime. Measuring the relationship between the redshift $z$ and the luminosity distance $D_{\rm L}$ of a standard candle, for example, yields ... |
1905.08263 | T. Padmanabhan | T. Padmanabhan | Thermality of the Rindler horizon: A simple derivation from the
structure of the inertial propagator | ver 2: pedagogical comments and references added; 14 pages;
publication in Phys. Rev. D | Phys. Rev. D 100, 045024 (2019) | 10.1103/PhysRevD.100.045024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Feynman propagator encodes all the physics contained in a free field and
transforms as a covariant bi-scalar. Therefore, we should be able to discover
the thermality of the Rindler horizon, just by probing the structure of the
propagator, expressed in the Rindler coordinates. I show that the thermal
nature of the... | [
{
"created": "Mon, 20 May 2019 18:00:03 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Aug 2019 06:17:12 GMT",
"version": "v2"
}
] | 2019-09-04 | [
[
"Padmanabhan",
"T.",
""
]
] | The Feynman propagator encodes all the physics contained in a free field and transforms as a covariant bi-scalar. Therefore, we should be able to discover the thermality of the Rindler horizon, just by probing the structure of the propagator, expressed in the Rindler coordinates. I show that the thermal nature of the R... |
1102.5252 | Christian Teichm\"uller | C. Teichm\"uller, M. B. Fr\"ob, F. Maucher | Analytical approximation of the exterior gravitational field of rotating
neutron stars | 9 pages, 10 figures, 3 tables | Class. Quantum Grav. 28 155015, 2011 | 10.1088/0264-9381/28/15/155015 | null | gr-qc math-ph math.MP nlin.PS nlin.SI | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that B\"acklund transformations can be used to generate
stationary axisymmetric solutions of Einstein's vacuum field equations with any
number of constants. We will use this class of exact solutions to describe the
exterior vacuum region of numerically calculated neutron stars. Therefore we
study how an E... | [
{
"created": "Fri, 25 Feb 2011 14:15:16 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Mar 2011 15:19:34 GMT",
"version": "v2"
}
] | 2011-09-12 | [
[
"Teichmüller",
"C.",
""
],
[
"Fröb",
"M. B.",
""
],
[
"Maucher",
"F.",
""
]
] | It is known that B\"acklund transformations can be used to generate stationary axisymmetric solutions of Einstein's vacuum field equations with any number of constants. We will use this class of exact solutions to describe the exterior vacuum region of numerically calculated neutron stars. Therefore we study how an Ern... |
0806.1396 | Eugen Radu | Yves Brihaye and Eugen Radu | Black objects in the Einstein-Gauss-Bonnet theory with negative
cosmological constant and the boundary counterterm method | 27 pages, 6 figures, references added, discussion extended | JHEP0809:006,2008 | 10.1088/1126-6708/2008/09/006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose to compute the action and global charges of the asymptotically
anti-de Sitter solutions in Einstein-Gauss-Bonnet theory by adding boundary
counterterms to the gravitational action. The general expression of the
counterterms and the boundary stress tensor is presented for spacetimes of
dimension $d\leq 9$. ... | [
{
"created": "Mon, 9 Jun 2008 08:36:02 GMT",
"version": "v1"
},
{
"created": "Sun, 31 Aug 2008 13:39:45 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Brihaye",
"Yves",
""
],
[
"Radu",
"Eugen",
""
]
] | We propose to compute the action and global charges of the asymptotically anti-de Sitter solutions in Einstein-Gauss-Bonnet theory by adding boundary counterterms to the gravitational action. The general expression of the counterterms and the boundary stress tensor is presented for spacetimes of dimension $d\leq 9$. We... |
1904.10806 | Joao Paulo Manoel Pitelli | Jo\~ao Paulo M. Pitelli, Vitor S. Barroso and Ricardo A. Mosna | Boundary conditions and renormalized stress-energy tensor on a
Poincar\'e patch of $\textrm{AdS}_2$ | 7 pages. Minor Correction. Matches published version | Phys. Rev. D 99, 125008 (2019) | 10.1103/PhysRevD.99.125008 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum field theory on anti-de Sitter spacetime requires the introduction of
boundary conditions at its conformal boundary, due essentially to the absence
of global hyperbolicity. Here we calculate the renormalized stress-energy
tensor $T_{\mu\nu}$ for a scalar field $\phi$ on the Poincar\'e patch of
$\text{AdS}_2$ ... | [
{
"created": "Wed, 24 Apr 2019 13:30:32 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jul 2019 12:24:48 GMT",
"version": "v2"
}
] | 2019-07-25 | [
[
"Pitelli",
"João Paulo M.",
""
],
[
"Barroso",
"Vitor S.",
""
],
[
"Mosna",
"Ricardo A.",
""
]
] | Quantum field theory on anti-de Sitter spacetime requires the introduction of boundary conditions at its conformal boundary, due essentially to the absence of global hyperbolicity. Here we calculate the renormalized stress-energy tensor $T_{\mu\nu}$ for a scalar field $\phi$ on the Poincar\'e patch of $\text{AdS}_2$ an... |
1807.03629 | Abhineet Agarwal | Abhineet Agarwal, Sabit Bekov, Kairat Myrzakulov | Quintessential Inflation and curvaton reheating | 8 pages, 2 figures Minor corrections removing text overlap with
arXiv:astro-ph/0302054 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider a model of quintessential inflation based upon
inverse hyperbolic potential. We employ curvaton mechanism for reheating which
is more efficient than gravitational particle production; the mechanism
complies with nucleosynthesis constraint due to relic gravity waves. We obtain
a lower bound ... | [
{
"created": "Fri, 6 Jul 2018 13:12:46 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jul 2018 12:44:20 GMT",
"version": "v2"
}
] | 2018-07-25 | [
[
"Agarwal",
"Abhineet",
""
],
[
"Bekov",
"Sabit",
""
],
[
"Myrzakulov",
"Kairat",
""
]
] | In this paper, we consider a model of quintessential inflation based upon inverse hyperbolic potential. We employ curvaton mechanism for reheating which is more efficient than gravitational particle production; the mechanism complies with nucleosynthesis constraint due to relic gravity waves. We obtain a lower bound on... |
gr-qc/0312026 | Joan Josep Ferrando | Bartolom\'e Coll and Joan Josep Ferrando | Ideal Gas Stephani Universes | 6 pages | Reference frames and Gravitomagnetism. Proceedings of Spanish
Relativity Meeting-2000 (Singapore: World Scientific, 2001) | null | null | gr-qc | null | The Stephani Universes that can be interpreted as an ideal gas evolving in
local thermal equilibrium are determined, and the method to obtain the
associated thermodynamic schemes is given
| [
{
"created": "Thu, 4 Dec 2003 10:36:07 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Coll",
"Bartolomé",
""
],
[
"Ferrando",
"Joan Josep",
""
]
] | The Stephani Universes that can be interpreted as an ideal gas evolving in local thermal equilibrium are determined, and the method to obtain the associated thermodynamic schemes is given |
1810.10586 | David Mattingly | David Mattingly, Matthew Roberson, Sayandeb Basu | Algebra of Universal Horizon Preserving Diffeomorphisms | 11 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In relativistic gravity, requiring a spacetime hypersurface be a Killing
horizon breaks the general covariance of general relativity. The residual
algebra of horizon preserving diffeomorphisms can be extended to a Virasoro
algebra near the horizon, the central charge of which yields the
Bekenstein-Hawking entropy via... | [
{
"created": "Wed, 24 Oct 2018 19:39:14 GMT",
"version": "v1"
}
] | 2018-10-26 | [
[
"Mattingly",
"David",
""
],
[
"Roberson",
"Matthew",
""
],
[
"Basu",
"Sayandeb",
""
]
] | In relativistic gravity, requiring a spacetime hypersurface be a Killing horizon breaks the general covariance of general relativity. The residual algebra of horizon preserving diffeomorphisms can be extended to a Virasoro algebra near the horizon, the central charge of which yields the Bekenstein-Hawking entropy via t... |
2012.08603 | Gabriel Herczeg | Stephon Alexander, Gabriel Herczeg, and Joao Magueijo | A generalized Hartle-Hawking wavefunction | 15 pages, 2 figures, journal version | Classical and Quantum Gravity, 2021, Volume 38, Number 9 | 10.1088/1361-6382/abf2f6 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | The Hartle-Hawking wave function is known to be the Fourier dual of the
Chern-Simons or Kodama state reduced to mini-superspace, using an integration
contour covering the whole real line. But since the Chern-Simons state is a
general solution of the Hamiltonian constraint (with a given ordering), its
Fourier dual sho... | [
{
"created": "Tue, 15 Dec 2020 20:39:31 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Apr 2021 15:45:05 GMT",
"version": "v2"
}
] | 2021-04-21 | [
[
"Alexander",
"Stephon",
""
],
[
"Herczeg",
"Gabriel",
""
],
[
"Magueijo",
"Joao",
""
]
] | The Hartle-Hawking wave function is known to be the Fourier dual of the Chern-Simons or Kodama state reduced to mini-superspace, using an integration contour covering the whole real line. But since the Chern-Simons state is a general solution of the Hamiltonian constraint (with a given ordering), its Fourier dual shoul... |
1504.07559 | Aurelien Barrau | Abhay Ashtekar, Aurelien Barrau | Loop quantum cosmology: From pre-inflationary dynamics to observations | Invited review article for the "focus issue" of Classical and Quantum
Gravity : "Planck and the fundamentals of cosmology" | null | 10.1088/0264-9381/32/23/234001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Planck collaboration has provided us rich information about the early
universe, and a host of new observational missions will soon shed further light
on the `anomalies' that appear to exist on the largest angular scales. From a
quantum gravity perspective, it is natural to inquire if one can trace back the
origin... | [
{
"created": "Tue, 28 Apr 2015 16:31:19 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Sep 2015 14:47:02 GMT",
"version": "v2"
}
] | 2015-11-18 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Barrau",
"Aurelien",
""
]
] | The Planck collaboration has provided us rich information about the early universe, and a host of new observational missions will soon shed further light on the `anomalies' that appear to exist on the largest angular scales. From a quantum gravity perspective, it is natural to inquire if one can trace back the origin o... |
1301.2140 | Gunter Scharf | G\"unter Scharf | Nonstandard general relativity III: The Kerr class | 10 pages, no figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the Kerr metric in Boyer-Lindquist coordinates and construct the
corresponding class of nonstandard solutions of Einstein's equations. These
solutions can be used to describe the outer part of spiral galaxies without
assuming dark matter.
| [
{
"created": "Thu, 10 Jan 2013 14:51:05 GMT",
"version": "v1"
}
] | 2013-01-11 | [
[
"Scharf",
"Günter",
""
]
] | We revisit the Kerr metric in Boyer-Lindquist coordinates and construct the corresponding class of nonstandard solutions of Einstein's equations. These solutions can be used to describe the outer part of spiral galaxies without assuming dark matter. |
2301.00449 | Kristian Gjorgjieski | Kristian Gjorgjieski, Jutta Kunz, Matheus C. Teodoro, Lucas G.
Collodel, Petya Nedkova | Magnetized Thick Disks around Boson Stars | null | null | 10.1103/PhysRevD.107.103043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effects of magnetic fields on accretion disks around compact objects are
of high importance in the study of their general properties and dynamics. Here
we analyze the influence of magnetic fields on thick accretion disks around
rotating boson stars. We assume a uniform constant specific angular momentum
distribut... | [
{
"created": "Sun, 1 Jan 2023 17:57:53 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Apr 2023 19:24:45 GMT",
"version": "v2"
}
] | 2023-06-07 | [
[
"Gjorgjieski",
"Kristian",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Teodoro",
"Matheus C.",
""
],
[
"Collodel",
"Lucas G.",
""
],
[
"Nedkova",
"Petya",
""
]
] | The effects of magnetic fields on accretion disks around compact objects are of high importance in the study of their general properties and dynamics. Here we analyze the influence of magnetic fields on thick accretion disks around rotating boson stars. We assume a uniform constant specific angular momentum distributio... |
1311.2015 | Elias C. Vagenas | Douglas Singleton, Elias C. Vagenas, Tao Zhu | Self-similarity, conservation of entropy/bits and the black hole
information puzzle | v1: 11 pages, LaTeX, awarded a Fourth Prize in the 2013 FQXi's Essay
Contest "It From Bit, or Bit From It"; v2: a new paragraph added at the end
of the manuscript, no change in physics, to appear in JHEP | null | 10.1007/JHEP05(2014)074 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | John Wheeler coined the phrase "it from bit" or "bit from it" in the 1980s.
However, much of the interest in the connection between information, i.e.
"bits", and physical objects, i.e. "its", stems from the discovery that black
holes have characteristics of thermodynamic systems having entropies and
temperatures. Thi... | [
{
"created": "Fri, 8 Nov 2013 16:34:45 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Apr 2014 22:24:41 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Singleton",
"Douglas",
""
],
[
"Vagenas",
"Elias C.",
""
],
[
"Zhu",
"Tao",
""
]
] | John Wheeler coined the phrase "it from bit" or "bit from it" in the 1980s. However, much of the interest in the connection between information, i.e. "bits", and physical objects, i.e. "its", stems from the discovery that black holes have characteristics of thermodynamic systems having entropies and temperatures. This ... |
1404.7315 | Yusuf Kucukakca | Yusuf Kucukakca | Scalar Tensor Teleparallel Dark Gravity via Noether Symmetry | 10 pages, 3 figures, Published in The European Physical Journal C,
Feb. 2013 | null | 10.1140/epjc/s10052-013-2327-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, in the framework of teleparallel gravity we consider scalar
tensor theories of gravity in which scalar fields are nonminimal coupled to
torsion scalar. Noether symmetry of the Lagrangian of such a theory for the
Friedman-Robertson-Walker spacetime is used to determine the explicit forms for
the couplin... | [
{
"created": "Tue, 29 Apr 2014 11:30:46 GMT",
"version": "v1"
}
] | 2014-04-30 | [
[
"Kucukakca",
"Yusuf",
""
]
] | In this paper, in the framework of teleparallel gravity we consider scalar tensor theories of gravity in which scalar fields are nonminimal coupled to torsion scalar. Noether symmetry of the Lagrangian of such a theory for the Friedman-Robertson-Walker spacetime is used to determine the explicit forms for the coupling ... |
1611.02215 | Ale\v{s} Flandera | Ale\v{s} Flandera | Geometry of isolated horizons | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While the formalism of isolated horizons is known for some time, only quite
recently the near horizon solution of Einstein's equations has been found in
the Bondi-like coordinates by Krishnan in 2012. In this framework, the
space-time is regarded as the characteristic initial value problem with the
initial data given... | [
{
"created": "Mon, 7 Nov 2016 19:06:28 GMT",
"version": "v1"
}
] | 2016-11-08 | [
[
"Flandera",
"Aleš",
""
]
] | While the formalism of isolated horizons is known for some time, only quite recently the near horizon solution of Einstein's equations has been found in the Bondi-like coordinates by Krishnan in 2012. In this framework, the space-time is regarded as the characteristic initial value problem with the initial data given o... |
1303.5033 | Mehedi Kalam | Mehedi Kalam, Farook Rahaman, Sk. Monowar Hossein and Jayanta Naskar | Galactic rotation curves and strange quark matter with observational
constraints | 12 pages,4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain the space time of the galactic core in the framework of general
relativity by taking the flat rotational curve as input and considering the
matter content in the galactic core region as strange quark matter. We also
obtain the energy density, radial and tangential pressures of the core strange
quark matter.... | [
{
"created": "Wed, 20 Mar 2013 19:14:13 GMT",
"version": "v1"
}
] | 2013-03-21 | [
[
"Kalam",
"Mehedi",
""
],
[
"Rahaman",
"Farook",
""
],
[
"Hossein",
"Sk. Monowar",
""
],
[
"Naskar",
"Jayanta",
""
]
] | We obtain the space time of the galactic core in the framework of general relativity by taking the flat rotational curve as input and considering the matter content in the galactic core region as strange quark matter. We also obtain the energy density, radial and tangential pressures of the core strange quark matter. S... |
1408.2356 | Walter Del Pozzo | Walter Del Pozzo, Katherine Grover, Ilya Mandel, Alberto Vecchio | Testing general relativity with compact coalescing binaries: comparing
exact and predictive methods to compute the Bayes factor | 13 pages, 4 figures, accepted for publication in Classical and
Quantum Gravity | null | 10.1088/0264-9381/31/20/205006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The second generation of gravitational-wave detectors is scheduled to start
operations in 2015. Gravitational-wave signatures of compact binary
coalescences could be used to accurately test the strong-field dynamical
predictions of general relativity. Computationally expensive data analysis
pipelines, including TIGER... | [
{
"created": "Mon, 11 Aug 2014 09:30:14 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Del Pozzo",
"Walter",
""
],
[
"Grover",
"Katherine",
""
],
[
"Mandel",
"Ilya",
""
],
[
"Vecchio",
"Alberto",
""
]
] | The second generation of gravitational-wave detectors is scheduled to start operations in 2015. Gravitational-wave signatures of compact binary coalescences could be used to accurately test the strong-field dynamical predictions of general relativity. Computationally expensive data analysis pipelines, including TIGER, ... |
1307.4446 | Antonio C. Guti\'errez-Pi\~neres | Antonio C. Guti\'errez-Pi\~neres | Relativistic disks with two charged perfect fluids components | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A method to describe exact solutions of the Einstein-Maxwell field equations
in terms of relativistic thin disks constituted by two perfect charged fluids
is presented. Describing the surface of the disk as a single charged fluid we
find explicit expressions for the rest energies, the pressures and the electric
charg... | [
{
"created": "Tue, 16 Jul 2013 23:07:38 GMT",
"version": "v1"
}
] | 2013-07-18 | [
[
"Gutiérrez-Piñeres",
"Antonio C.",
""
]
] | A method to describe exact solutions of the Einstein-Maxwell field equations in terms of relativistic thin disks constituted by two perfect charged fluids is presented. Describing the surface of the disk as a single charged fluid we find explicit expressions for the rest energies, the pressures and the electric charge ... |
gr-qc/0701168 | Dragan Hajdukovic | Dragan Slavkov Hajdukovic | Dark energy, antimatter gravity and geometry of the Universe | null | Astrophys. Space Sci.330:1-5,2010 | 10.1007/s10509-010-0387-x | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article is based on two hypotheses. The first one is the existence of
the gravitational repulsion between particles and antiparticles. Consequently,
virtual particle-antiparticle pairs in the quantum vacuum may be considered as
gravitational dipoles. The second hypothesis is that the Universe has geometry
of a f... | [
{
"created": "Tue, 30 Jan 2007 15:16:13 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Dec 2007 23:59:08 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Mar 2010 20:48:48 GMT",
"version": "v3"
}
] | 2011-02-10 | [
[
"Hajdukovic",
"Dragan Slavkov",
""
]
] | This article is based on two hypotheses. The first one is the existence of the gravitational repulsion between particles and antiparticles. Consequently, virtual particle-antiparticle pairs in the quantum vacuum may be considered as gravitational dipoles. The second hypothesis is that the Universe has geometry of a fou... |
2101.08199 | Jun Tao | Yihe Cao, Hanwen Feng, Wei Hong and Jun Tao | Joule-Thomson Expansion of RN-AdS Black Hole Immersed in Perfect Fluid
Dark Matter | null | null | 10.1088/1572-9494/ac1066 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the Joule-Thomson expansion for RN-AdS black holes
immersed in perfect fluid dark matter. Firstly, the negative cosmological
constant could be interpreted as thermodynamic pressure and its conjugate
quantity with the volume gave us more physical insights into the black hole. We
derive the ther... | [
{
"created": "Wed, 20 Jan 2021 16:17:43 GMT",
"version": "v1"
}
] | 2021-09-01 | [
[
"Cao",
"Yihe",
""
],
[
"Feng",
"Hanwen",
""
],
[
"Hong",
"Wei",
""
],
[
"Tao",
"Jun",
""
]
] | In this paper, we study the Joule-Thomson expansion for RN-AdS black holes immersed in perfect fluid dark matter. Firstly, the negative cosmological constant could be interpreted as thermodynamic pressure and its conjugate quantity with the volume gave us more physical insights into the black hole. We derive the thermo... |
2012.01306 | Jun Zhang | Jun Zhang and Yuan Sun | Hawking radiation from nonrotating singularity-free black holes in
conformal gravity | 10 pages, 3 figures, 6 tables, accepted version in Int. J. Mod. Phys.
D | null | 10.1142/S0218271822500298 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the sparsity of Hawking radiation from nonrotating singularity-free
black holes in conformal gravity. We give a rigorous bound on the greybody
factor for massless scalar field and calculate the sparsity of Hawking
radiation from the black hole. Besides, we investigate the dependence of the
greybody factor an... | [
{
"created": "Wed, 2 Dec 2020 16:20:16 GMT",
"version": "v1"
},
{
"created": "Sat, 5 Dec 2020 12:28:21 GMT",
"version": "v2"
},
{
"created": "Sat, 18 Dec 2021 12:19:11 GMT",
"version": "v3"
}
] | 2022-02-22 | [
[
"Zhang",
"Jun",
""
],
[
"Sun",
"Yuan",
""
]
] | We study the sparsity of Hawking radiation from nonrotating singularity-free black holes in conformal gravity. We give a rigorous bound on the greybody factor for massless scalar field and calculate the sparsity of Hawking radiation from the black hole. Besides, we investigate the dependence of the greybody factor and ... |
gr-qc/0508033 | Eugen Radu | Eugen Radu and D. H. Tchrakian | No hair conjecture, nonabelian hierarchies and anti-de Sitter spacetime | 21 pages, 15 figures; v2: calculations clarified, references added | Phys.Rev.D73:024006,2006 | 10.1103/PhysRevD.73.024006 | null | gr-qc hep-th | null | We consider globally regular and black holes solutions for the
Einstein-Yang-Mills system with negative cosmological constant in $d-$spacetime
dimensions. We find that the ADM mass of the spherically symmetric solutions
generically diverges for $d>4$. Solutions with finite mass are found by
considering corrections to... | [
{
"created": "Tue, 9 Aug 2005 13:13:27 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Dec 2005 10:26:53 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Radu",
"Eugen",
""
],
[
"Tchrakian",
"D. H.",
""
]
] | We consider globally regular and black holes solutions for the Einstein-Yang-Mills system with negative cosmological constant in $d-$spacetime dimensions. We find that the ADM mass of the spherically symmetric solutions generically diverges for $d>4$. Solutions with finite mass are found by considering corrections to t... |
gr-qc/9702056 | Orfeu Bertolami | Orfeu Bertolami | Dualities, CPT Symmetry and Dimensional Reduction in String Theory | Latex file plus macro espcrc2.sty and two figures. Invited talk
presented at the Second Conference on Constrained Dynamics and Quantum
Gravity, Santa Margherita Ligure, Italy, September 1996. To appear in Nucl.
Phys. B. Suppl | Nucl.Phys.Proc.Suppl. 57 (1997) 91-103 | 10.1016/S0920-5632(97)00357-5 | DF/IST-2-97 | gr-qc | null | In this lecture we address the following issues in the context of string
theories: i) The role played by S and T dualities in obtaining topological
inflation in N=1 supergravity models, ii) A mechanism to generate the baryon
asymmetry of the Universe based on the string interactions that violate CPT
symmetry and iii)... | [
{
"created": "Wed, 26 Feb 1997 11:58:44 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Bertolami",
"Orfeu",
""
]
] | In this lecture we address the following issues in the context of string theories: i) The role played by S and T dualities in obtaining topological inflation in N=1 supergravity models, ii) A mechanism to generate the baryon asymmetry of the Universe based on the string interactions that violate CPT symmetry and iii) T... |
1905.08484 | Giulia Gubitosi | Giulia Gubitosi, Joao Magueijo | Life of cosmological perturbations in MDR models, and the prospect of
travelling primordial gravitational waves | 9 pages, 1 figure. v2 matches version accepted for publication | Phys. Rev. D 100, 123501 (2019) | 10.1103/PhysRevD.100.123501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We follow the life of a generic primordial perturbation mode (scalar or
tensor) subject to modified dispersion relations (MDR), as its proper
wavelength is stretched by expansion. A necessary condition ensuring that
travelling waves can be converted into standing waves is that the mode starts
its life deep inside the... | [
{
"created": "Tue, 21 May 2019 08:22:22 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Nov 2019 16:27:54 GMT",
"version": "v2"
}
] | 2019-12-11 | [
[
"Gubitosi",
"Giulia",
""
],
[
"Magueijo",
"Joao",
""
]
] | We follow the life of a generic primordial perturbation mode (scalar or tensor) subject to modified dispersion relations (MDR), as its proper wavelength is stretched by expansion. A necessary condition ensuring that travelling waves can be converted into standing waves is that the mode starts its life deep inside the h... |
1510.05771 | Rex Liu | Rex G. Liu, Ruth M. Williams | Cosmological modelling with Regge calculus | 8 pages, 5 figures, to appear in the conference proceedings of
HTGRG-2 2015, Quy Nhon, Vietnam | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The late universe's matter distribution obeys the Copernican principle at
only the coarsest of scales. The relative importance of such inhomogeneity is
still not well understood. Because of the Einstein field equations' non-linear
nature, some argue a non-perturbative approach is necessary to correctly model
inhomoge... | [
{
"created": "Wed, 14 Oct 2015 15:09:01 GMT",
"version": "v1"
}
] | 2015-10-21 | [
[
"Liu",
"Rex G.",
""
],
[
"Williams",
"Ruth M.",
""
]
] | The late universe's matter distribution obeys the Copernican principle at only the coarsest of scales. The relative importance of such inhomogeneity is still not well understood. Because of the Einstein field equations' non-linear nature, some argue a non-perturbative approach is necessary to correctly model inhomogene... |
2001.06581 | Yu-Xiao Liu | Zi-Chao Lin, Hao Yu, Yu-Xiao Liu | Constraint on the radius of five-dimensional dS spacetime with GW170817
and GRB 170817A | 13 pages, 3 figures, published version | Phys.Rev.D 101 (2020) 10, 104058 | 10.1103/PhysRevD.101.104058 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent detections of the gravitational wave (GW) event GW170817 and its
electromagnetic counterpart GRB 170817A produced by a binary neutron star (NS)
merger is a new milestone of multimessenger astronomy. The time interval
between these two signals has attracted widespread attention from physicists.
In the brane... | [
{
"created": "Sat, 18 Jan 2020 02:46:27 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Jun 2020 09:29:28 GMT",
"version": "v2"
}
] | 2020-06-05 | [
[
"Lin",
"Zi-Chao",
""
],
[
"Yu",
"Hao",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | The recent detections of the gravitational wave (GW) event GW170817 and its electromagnetic counterpart GRB 170817A produced by a binary neutron star (NS) merger is a new milestone of multimessenger astronomy. The time interval between these two signals has attracted widespread attention from physicists. In the branewo... |
1903.03514 | Saibal Ray | Sourav Roy Chowdhury, Debabrata Deb, Farook Rahaman, Saibal Ray and
B.K. Guha | Anisotropic strange star in Finsler geometry | 15 pages, 17 figures | null | 10.1142/S0218271820500017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper, we report on a study of the anisotropic strange stars
under Finsler geometry. Keeping in mind that Finsler spacetime is not merely a
generalization of Riemannian geometry rather the main idea is the projectivized
tangent bundle of the manifold $\mathpzc{M}$, we have developed the respective
fiel... | [
{
"created": "Fri, 1 Mar 2019 07:03:30 GMT",
"version": "v1"
}
] | 2020-03-18 | [
[
"Chowdhury",
"Sourav Roy",
""
],
[
"Deb",
"Debabrata",
""
],
[
"Rahaman",
"Farook",
""
],
[
"Ray",
"Saibal",
""
],
[
"Guha",
"B. K.",
""
]
] | In the present paper, we report on a study of the anisotropic strange stars under Finsler geometry. Keeping in mind that Finsler spacetime is not merely a generalization of Riemannian geometry rather the main idea is the projectivized tangent bundle of the manifold $\mathpzc{M}$, we have developed the respective field ... |
2003.04266 | Tuan Do | Tuan Q. Do, W. F. Kao, and Ing-Chen Lin | CMB imprints of non-canonical anisotropic inflation | 22 pages, 7 figures, minor revision with additional discussions on
some important results investigated by other people. Some relevant references
are added. All results and conclusions are not changed. Accepted for
publication in EPJC. Comments are welcome | Eur. Phys. J. C 81, 390 (2021) | 10.1140/epjc/s10052-021-09181-x | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Effect of non-canonical scalar fields on the CMB imprints of the anisotropic
inflation will be discussed in details in this paper. In particular, we are
able to obtain the general formalism of the angular power spectra in the scalar
perturbations, tensor perturbations, cross-correlations, and linear
polarization in t... | [
{
"created": "Mon, 9 Mar 2020 17:17:02 GMT",
"version": "v1"
},
{
"created": "Thu, 6 May 2021 16:00:36 GMT",
"version": "v2"
}
] | 2021-05-07 | [
[
"Do",
"Tuan Q.",
""
],
[
"Kao",
"W. F.",
""
],
[
"Lin",
"Ing-Chen",
""
]
] | Effect of non-canonical scalar fields on the CMB imprints of the anisotropic inflation will be discussed in details in this paper. In particular, we are able to obtain the general formalism of the angular power spectra in the scalar perturbations, tensor perturbations, cross-correlations, and linear polarization in the... |
0801.1366 | Masoud Alimohammadi | M. Alimohammadi and A. A. Baghjary | Klein-Gordon and Dirac particles in non-constant scalar-curvature
background | 14 pages, LaTeX, to be published in Int. Jour. Mod. Phys. A | Int.J.Mod.Phys.A23:1613-1626,2008 | 10.1142/S0217751X08039463 | null | gr-qc | null | The Klein-Gordon and Dirac equations are considered in a semi-infinite lab
($x > 0$) in the presence of background metrics $ds^2 =u^2(x) \eta_{\mu\nu}
dx^\mu dx^\nu$ and $ds^2=-dt^2+u^2(x)\eta_{ij}dx^i dx^j$ with $u(x)=e^{\pm
gx}$. These metrics have non-constant scalar-curvatures. Various aspects of the
solutions ar... | [
{
"created": "Wed, 9 Jan 2008 07:11:48 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Jan 2008 10:01:18 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Alimohammadi",
"M.",
""
],
[
"Baghjary",
"A. A.",
""
]
] | The Klein-Gordon and Dirac equations are considered in a semi-infinite lab ($x > 0$) in the presence of background metrics $ds^2 =u^2(x) \eta_{\mu\nu} dx^\mu dx^\nu$ and $ds^2=-dt^2+u^2(x)\eta_{ij}dx^i dx^j$ with $u(x)=e^{\pm gx}$. These metrics have non-constant scalar-curvatures. Various aspects of the solutions are ... |
1809.03483 | Abhishek Majhi | Abhishek Majhi | Note on $SU(2)$ isolated horizon | 12 pages, version accepted for publication | Class.Quant.Grav. 37 (2020) 9, 095009 | 10.1088/1361-6382/ab7dd7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We point out that the symplectic structure, written in terms of the
Sen-Ashtekar-Immirzi-Barbero variables, of a spacetime admitting an isolated
horizon as the inner boundary, involves a positive constant parameter, say
$\sigma$, if $\gamma\neq\pm i$, where $\gamma$ is the Barbero-Immirzi
parameter. The parameter $\s... | [
{
"created": "Mon, 10 Sep 2018 17:56:42 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Sep 2018 05:04:04 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Apr 2020 09:41:18 GMT",
"version": "v3"
}
] | 2020-04-28 | [
[
"Majhi",
"Abhishek",
""
]
] | We point out that the symplectic structure, written in terms of the Sen-Ashtekar-Immirzi-Barbero variables, of a spacetime admitting an isolated horizon as the inner boundary, involves a positive constant parameter, say $\sigma$, if $\gamma\neq\pm i$, where $\gamma$ is the Barbero-Immirzi parameter. The parameter $\sig... |
gr-qc/9805101 | Jorma Louko | Alan Daughton, Jorma Louko, and Rafael D Sorkin | Instantons and unitarity in quantum cosmology with fixed four-volume | 32 pages, REVTeX v3.1 with amsfonts. (v2: minor typos etc corrected.) | Phys. Rev. D 58, 084008 (1998) | 10.1103/PhysRevD.58.084008 | PPG98-123, SU-GP-98/5-3 | gr-qc | null | We find a number of complex solutions of the Einstein equations in the
so-called unimodular version of general relativity, and we interpret them as
saddle points yielding estimates of a gravitational path integral over a space
of almost everywhere Lorentzian metrics on a spacetime manifold with topology
of the "no-bo... | [
{
"created": "Fri, 29 May 1998 11:22:58 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Sep 1998 11:30:35 GMT",
"version": "v2"
}
] | 2016-08-25 | [
[
"Daughton",
"Alan",
""
],
[
"Louko",
"Jorma",
""
],
[
"Sorkin",
"Rafael D",
""
]
] | We find a number of complex solutions of the Einstein equations in the so-called unimodular version of general relativity, and we interpret them as saddle points yielding estimates of a gravitational path integral over a space of almost everywhere Lorentzian metrics on a spacetime manifold with topology of the "no-boun... |
gr-qc/0208014 | Carlos Palenzuela | C. Bona, C. Palenzuela | The Gravitational Radiaton degrees of freedom in Hyperbolic Systems for
Numerical Relativity | 4 pages, no figures, accepted in PRD | Phys.Rev.D66:064020,2002 | 10.1103/PhysRevD.66.064020 | null | gr-qc | null | The gravitational radiation degrees of freedom of freedom are described in
the framework of the 3+1 decomposition of spacetime. The relationship with
eigenfields of the Kidder-Scheel-Teukolsky (KST) equations is established. This
relationship is used to fix a parameter in the KST equations which is related
to the ord... | [
{
"created": "Tue, 6 Aug 2002 09:07:46 GMT",
"version": "v1"
}
] | 2011-04-21 | [
[
"Bona",
"C.",
""
],
[
"Palenzuela",
"C.",
""
]
] | The gravitational radiation degrees of freedom of freedom are described in the framework of the 3+1 decomposition of spacetime. The relationship with eigenfields of the Kidder-Scheel-Teukolsky (KST) equations is established. This relationship is used to fix a parameter in the KST equations which is related to the order... |
1212.3439 | Marie-No\"elle C\'el\'erier | Marie-No\"elle C\'el\'erier, Priti Mishra and Tejinder P. Singh | Fully Characterizing Axially Symmetric Szekeres Models With Three Data
Sets | 4 pages, no figure, to be published in the proceedings of the 13th
Marcel Grossmann Meeting held in Stockholm, 1-7 July 2012 | null | 10.1142/9789814623995_0492 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inhomogeneous exact solutions of General Relativity with zero cosmological
constant have been used in the literature to challenge the \Lambda CDM model.
From one patch Lema\^itre-Tolman-Bondi (LTB) models to axially symmetric
quasi-spherical Szekeres (QSS) Swiss-cheese models, some of them are able to
reproduce to a ... | [
{
"created": "Fri, 14 Dec 2012 10:56:27 GMT",
"version": "v1"
}
] | 2017-03-29 | [
[
"Célérier",
"Marie-Noëlle",
""
],
[
"Mishra",
"Priti",
""
],
[
"Singh",
"Tejinder P.",
""
]
] | Inhomogeneous exact solutions of General Relativity with zero cosmological constant have been used in the literature to challenge the \Lambda CDM model. From one patch Lema\^itre-Tolman-Bondi (LTB) models to axially symmetric quasi-spherical Szekeres (QSS) Swiss-cheese models, some of them are able to reproduce to a go... |
0705.1254 | Hujeirat | A. Hujeirat | An implicit numerical algorithm general relativistic hydrodynamics | 23 pages, 11 figures. This article has been replaced by
arXiv:0801.1017 | null | null | null | gr-qc | null | An implicit numerical algorithm general relativistic hydrodynamics This
article has been replaced by arXiv:0801.1017
| [
{
"created": "Wed, 9 May 2007 10:43:34 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Jan 2008 13:35:12 GMT",
"version": "v2"
}
] | 2016-09-08 | [
[
"Hujeirat",
"A.",
""
]
] | An implicit numerical algorithm general relativistic hydrodynamics This article has been replaced by arXiv:0801.1017 |
0803.3684 | Massimiliano Rinaldi | Massimiliano Rinaldi | A momentum-space representation of Green's functions with modified
dispersion relations on general backgrounds | Typos corrected, details and comments added. To appear on Physical
Review D | Phys.Rev.D78:024025,2008 | 10.1103/PhysRevD.78.024025 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the problem of calculating the Green's functions associated to a
massive scalar field with modified dispersion relations. We analyze the case
when dispersion is modified by higher derivative spatial operators acting on
the field orthogonally to a preferred direction, determined by a unit time-like
vector ... | [
{
"created": "Wed, 26 Mar 2008 09:53:24 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Apr 2008 09:48:41 GMT",
"version": "v2"
},
{
"created": "Wed, 4 Jun 2008 08:40:54 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Rinaldi",
"Massimiliano",
""
]
] | We consider the problem of calculating the Green's functions associated to a massive scalar field with modified dispersion relations. We analyze the case when dispersion is modified by higher derivative spatial operators acting on the field orthogonally to a preferred direction, determined by a unit time-like vector fi... |
gr-qc/9809073 | Lior M. Burko | Lior M. Burko | Singularity deep inside the spherical charged black hole core | 6 pages, to be published in Phys. Rev. D | Phys.Rev. D59 (1999) 024011 | 10.1103/PhysRevD.59.024011 | null | gr-qc | null | We study analytically the spacelike singularity inside a
spherically-symmetric, charged black hole coupled to a self-gravitating
spherical massless scalar field. We assume spatial homogeneity, and find a
generic solution in terms of a formal series expansion. This solution is tested
against fully-nonlinear and inhomo... | [
{
"created": "Sun, 27 Sep 1998 08:16:45 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Burko",
"Lior M.",
""
]
] | We study analytically the spacelike singularity inside a spherically-symmetric, charged black hole coupled to a self-gravitating spherical massless scalar field. We assume spatial homogeneity, and find a generic solution in terms of a formal series expansion. This solution is tested against fully-nonlinear and inhomoge... |
1603.07359 | Vilson T. Zanchin | Jos\'e P. S. Lemos and Vilson T. Zanchin | Regular black holes: Guilfoyle's electrically charged solutions with a
perfect fluid phantom core | null | Phys. Rev. D 93, 124012 (2016) | 10.1103/PhysRevD.93.124012 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Regular black hole solutions are found among the Guilfoyle exact solutions.
These are spherically symmetric solutions of general relativity coupled to
Maxwell's electromagnetism and charged matter where the metric potentials and
electromagnetic fields are related in some particularly simple form. We show
that, for ce... | [
{
"created": "Wed, 23 Mar 2016 21:00:38 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jun 2016 21:10:12 GMT",
"version": "v2"
}
] | 2016-06-30 | [
[
"Lemos",
"José P. S.",
""
],
[
"Zanchin",
"Vilson T.",
""
]
] | Regular black hole solutions are found among the Guilfoyle exact solutions. These are spherically symmetric solutions of general relativity coupled to Maxwell's electromagnetism and charged matter where the metric potentials and electromagnetic fields are related in some particularly simple form. We show that, for cert... |
gr-qc/0406088 | Roman Werpachowski | Jerzy Kijowski and Roman Werpachowski | Universality of affine formulation in General Relativity theory | 38 pages, no figures, LaTeX+BibTex, corrected (restructured contents,
one example removed, no additional results, typos fixed) version | Rept.Math.Phys.59:1,2007 | 10.1016/S0034-4877(07)80001-2 | null | gr-qc | null | Affine variational principle for General Relativity, proposed in 1978 by one
of us (J.K.), is a good remedy for the non-universal properties of the
standard, metric formulation, arising when the matter Lagrangian depends upon
the metric derivatives. Affine version of the theory cures the standard
drawback of the metr... | [
{
"created": "Tue, 22 Jun 2004 09:56:30 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Apr 2005 12:38:58 GMT",
"version": "v2"
},
{
"created": "Fri, 5 Jan 2007 19:37:00 GMT",
"version": "v3"
},
{
"created": "Mon, 29 Jan 2007 11:15:41 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Kijowski",
"Jerzy",
""
],
[
"Werpachowski",
"Roman",
""
]
] | Affine variational principle for General Relativity, proposed in 1978 by one of us (J.K.), is a good remedy for the non-universal properties of the standard, metric formulation, arising when the matter Lagrangian depends upon the metric derivatives. Affine version of the theory cures the standard drawback of the metric... |
1510.08526 | Kimet Jusufi | Kimet Jusufi | Gravitational lensing by Reissner-Nordstr\"om black holes with
topological defects | 8 pages, revised version, accepted for publication in Astrophysics
and Space Science | Astrophys. Space Sci. 361, 24, 2016 | 10.1007/s10509-015-2609-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using a new geometrical approach introduced by Gibbons and Werner we study
the deflection angle by Reissner-Nordstr\"{o}m black holes in the background
spacetimes with a global monopole and a cosmic string. By calculating the
corresponding optical Gaussian curvature and applying the Gauss-Bonnet theorem
to the optica... | [
{
"created": "Thu, 29 Oct 2015 00:12:46 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Dec 2015 13:21:39 GMT",
"version": "v2"
}
] | 2015-12-18 | [
[
"Jusufi",
"Kimet",
""
]
] | Using a new geometrical approach introduced by Gibbons and Werner we study the deflection angle by Reissner-Nordstr\"{o}m black holes in the background spacetimes with a global monopole and a cosmic string. By calculating the corresponding optical Gaussian curvature and applying the Gauss-Bonnet theorem to the optical ... |
1705.06654 | Vladimir Khatsymovsky | V.M. Khatsymovsky | Simplicial Palatini action | 19 pages, discussion of the finite diagram technique is added | Mod. Phys. Lett. A, Vol. 33, No. 1 (2018) 1850004 | 10.1142/S0217732318500049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the piecewise flat spacetime and a simplicial analog of the
Palatini form of the general relativity (GR) action where the discrete
Christoffel symbols are given on the tetrahedra as variables that are
independent of the metric. Excluding these variables classically gives exactly
the Regge action.
This p... | [
{
"created": "Thu, 18 May 2017 15:34:10 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Jun 2017 08:16:30 GMT",
"version": "v2"
},
{
"created": "Tue, 31 Oct 2017 16:17:10 GMT",
"version": "v3"
}
] | 2018-01-03 | [
[
"Khatsymovsky",
"V. M.",
""
]
] | We consider the piecewise flat spacetime and a simplicial analog of the Palatini form of the general relativity (GR) action where the discrete Christoffel symbols are given on the tetrahedra as variables that are independent of the metric. Excluding these variables classically gives exactly the Regge action. This paper... |
2105.05918 | Giuseppe Ficarra | Giuseppe Ficarra | Scalar field dynamics around black holes: superradiant instabilities and
binary evolution | 4 pages, 3 figures, contribution to the 2021 Gravitation session of
the 55th Rencontres de Moriond | null | null | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | In classical general relativity astrophysical black holes can be affected by
the superradiant instability when gravity is minimally coupled to a light
bosonic field. The majority of phenomenological studies have focused on the
idealized case in which the black hole is initially surrounded by a single mode
superradian... | [
{
"created": "Wed, 12 May 2021 19:28:02 GMT",
"version": "v1"
}
] | 2021-05-14 | [
[
"Ficarra",
"Giuseppe",
""
]
] | In classical general relativity astrophysical black holes can be affected by the superradiant instability when gravity is minimally coupled to a light bosonic field. The majority of phenomenological studies have focused on the idealized case in which the black hole is initially surrounded by a single mode superradiant ... |
gr-qc/0111011 | J. Ponce de Leon | J. Ponce de Leon | Equivalence Between Space-Time-Matter and Brane-World Theories | Typos corrected, three references added. To appear in Mod. Phys. Lett | Mod.Phys.Lett.A16:2291-2304,2001 | 10.1142/S0217732301005709 | null | gr-qc | null | We study the relationship between space-time-matter (STM) and brane theories.
These two theories look very different at first sight, and have different
motivation for the introduction of a large extra dimension. However, we show
that they are equivalent to each other. First we demonstrate that STM predicts
local and ... | [
{
"created": "Mon, 5 Nov 2001 11:05:52 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Nov 2001 17:31:20 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Nov 2001 06:47:25 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"de Leon",
"J. Ponce",
""
]
] | We study the relationship between space-time-matter (STM) and brane theories. These two theories look very different at first sight, and have different motivation for the introduction of a large extra dimension. However, we show that they are equivalent to each other. First we demonstrate that STM predicts local and no... |
gr-qc/0510028 | Peter D'Eath | A.N.St.J.Farley and P.D.D'Eath | Quantum Amplitudes in Black-Hole Evaporation I. Complex Approach | null | null | null | null | gr-qc | null | Here we examine the quantum-mechanical decay of a Schwarzschild-like black
hole, formed by gravitational collapse, into almost-flat space-time and weak
radiation at a very late time, in order to evaluate quantum amplitudes (not
just probabilities) for final states. No information is lost in collapse to a
black hole. ... | [
{
"created": "Fri, 7 Oct 2005 16:02:44 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Farley",
"A. N. St. J.",
""
],
[
"D'Eath",
"P. D.",
""
]
] | Here we examine the quantum-mechanical decay of a Schwarzschild-like black hole, formed by gravitational collapse, into almost-flat space-time and weak radiation at a very late time, in order to evaluate quantum amplitudes (not just probabilities) for final states. No information is lost in collapse to a black hole. Bo... |
2111.07996 | Susana Valdez Alvarado | Walberto Guzm\'an-Ram\'irez, Ricardo Becerril, Susana Valdez-Alvarado
and Alexei A. Deriglazov | Spinning gravimagnetic particles in Schwarzschild-like black holes | 19 pages, 14 figure | null | 10.1103/PhysRevD.105.124036 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the motion of a spinning particle with gravimagnetic moment in
Schwarzschild-like spacetimes with a metric $ds^2=-f(r) dt^2 + f^{-1}(r) dr^2 +
r^2 d\Omega^2$, specifically we deal with Schwarzschild, Reissner-Nordstrom
black holes as well as Ayon-Beato-Garcia and Bardeen regular spacetimes. First,
we introdu... | [
{
"created": "Mon, 15 Nov 2021 18:57:47 GMT",
"version": "v1"
}
] | 2022-06-29 | [
[
"Guzmán-Ramírez",
"Walberto",
""
],
[
"Becerril",
"Ricardo",
""
],
[
"Valdez-Alvarado",
"Susana",
""
],
[
"Deriglazov",
"Alexei A.",
""
]
] | We study the motion of a spinning particle with gravimagnetic moment in Schwarzschild-like spacetimes with a metric $ds^2=-f(r) dt^2 + f^{-1}(r) dr^2 + r^2 d\Omega^2$, specifically we deal with Schwarzschild, Reissner-Nordstrom black holes as well as Ayon-Beato-Garcia and Bardeen regular spacetimes. First, we introduce... |
1509.04306 | Carlos A. S. Almeida | Victor Santos, R. V. Maluf, C. A. S. Almeida | Quasinormal frequencies of self-dual black holes | 17 pages, 5 figures. Some improvements with respect to the previous
version. Final version to appear in Phys. Rev. D | Phys. Rev. D 93, 084047 (2016) | 10.1103/PhysRevD.93.084047 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One simplified black hole model constructed from a semiclassical analysis of
loop quantum gravity (LQG) is called self-dual black hole. This black hole
solution depends on a free dimensionless parameter P known as the polymeric
parameter and also on the $a_{0}$ area related to the minimum area gap of LQG.
In the limi... | [
{
"created": "Mon, 14 Sep 2015 20:30:10 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Apr 2016 22:59:50 GMT",
"version": "v2"
}
] | 2016-05-04 | [
[
"Santos",
"Victor",
""
],
[
"Maluf",
"R. V.",
""
],
[
"Almeida",
"C. A. S.",
""
]
] | One simplified black hole model constructed from a semiclassical analysis of loop quantum gravity (LQG) is called self-dual black hole. This black hole solution depends on a free dimensionless parameter P known as the polymeric parameter and also on the $a_{0}$ area related to the minimum area gap of LQG. In the limit ... |
0801.2821 | Azad Akhter Siddiqui | Asghar Qadir and Azad A. Siddiqui | On Quantum Effects Near a Black Hole Singularity | Perprint of the AS-ICTP | Class.Quant.Grav.7:511-513,1990 | 10.1088/0264-9381/7/3/025 | null | gr-qc | null | It is pointed out that the claim made by Joshi and Joshi [1], has not been
rigorously demonstrated by them. A simpler and more correct proof is provided.
| [
{
"created": "Fri, 18 Jan 2008 06:48:23 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Qadir",
"Asghar",
""
],
[
"Siddiqui",
"Azad A.",
""
]
] | It is pointed out that the claim made by Joshi and Joshi [1], has not been rigorously demonstrated by them. A simpler and more correct proof is provided. |
2302.05873 | Robert Brandenberger | Vincent Comeau and Robert Brandenberger | Back-Reaction of Long-Wavelength Cosmological Fluctuations as Measured
by a Clock Field | 6 pages | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the back-reaction of cosmological fluctuations on the local
expansion rate averaged over a space-like hypersurface of constant value of a
clock field. We show that in the infrared limit, the fluctuations lead to a
decrease in the average expansion rate, measured at a fixed value of the clock
field, compar... | [
{
"created": "Sun, 12 Feb 2023 08:39:25 GMT",
"version": "v1"
}
] | 2023-02-14 | [
[
"Comeau",
"Vincent",
""
],
[
"Brandenberger",
"Robert",
""
]
] | We consider the back-reaction of cosmological fluctuations on the local expansion rate averaged over a space-like hypersurface of constant value of a clock field. We show that in the infrared limit, the fluctuations lead to a decrease in the average expansion rate, measured at a fixed value of the clock field, compared... |
gr-qc/0511022 | Nergis Mavalvala | Thomas Corbitt, David Ottaway, Edith Innerhofer, Jason Pelc, and
Nergis Mavalvala | Measurement of radiation-pressure-induced optomechanical dynamics in a
suspended Fabry-Perot cavity | 4 pages, 3 figures | null | 10.1103/PhysRevA.74.021802 | null | gr-qc | null | We report on experimental observation of radiation-pressure induced effects
in a high-power optical cavity. These effects play an important role in next
generation gravitational wave (GW) detectors, as well as in quantum
non-demolition (QND) interferometers. We measure the properties of an optical
spring, created by ... | [
{
"created": "Fri, 4 Nov 2005 19:43:41 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Corbitt",
"Thomas",
""
],
[
"Ottaway",
"David",
""
],
[
"Innerhofer",
"Edith",
""
],
[
"Pelc",
"Jason",
""
],
[
"Mavalvala",
"Nergis",
""
]
] | We report on experimental observation of radiation-pressure induced effects in a high-power optical cavity. These effects play an important role in next generation gravitational wave (GW) detectors, as well as in quantum non-demolition (QND) interferometers. We measure the properties of an optical spring, created by co... |
1406.4102 | Morteza Yavari - | Morteza Yavari | Energy-momentum distribution of a general plane symmetric spacetime in
metric f(R) gravity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the exact vacuum solution of a general plane symmetric
spacetime is investigated in metric f(R) gravity with the assumption of
constant Ricci scalar. For this solution, we have studied the generalized
Landau-Lifshitz energy-momentum complex in this theory to determine the energy
distribution expression... | [
{
"created": "Fri, 13 Jun 2014 07:18:27 GMT",
"version": "v1"
}
] | 2014-06-17 | [
[
"Yavari",
"Morteza",
""
]
] | In this paper, the exact vacuum solution of a general plane symmetric spacetime is investigated in metric f(R) gravity with the assumption of constant Ricci scalar. For this solution, we have studied the generalized Landau-Lifshitz energy-momentum complex in this theory to determine the energy distribution expressions ... |
gr-qc/9701050 | Hideyuki Tagoshi | T.Tanaka, H.Tagoshi and M.Sasaki | Gravitational Waves by a Particle in Circular Orbits around a
Schwarzschild black hole -5.5 Post-Newtonian Formula- | 15 pages, ptptex, 2 figures | Prog.Theor.Phys.96:1087-1101,1996 | 10.1143/PTP.96.1087 | OU-TAP 44, NAOJ-Th-Ap-1996-3 | gr-qc | null | Using the post-Newtonian (PN) expansion technique of the gravitational wave
perturbation around a Schwarzschild black hole, we calculate analytically the
energy flux of gravitational waves induced by a particle in circular orbits up
to the 5.5PN order, i.e. $O(v^{11})$ beyond Newtonian. By comparing the formula
with ... | [
{
"created": "Thu, 23 Jan 1997 11:43:37 GMT",
"version": "v1"
}
] | 2009-10-09 | [
[
"Tanaka",
"T.",
""
],
[
"Tagoshi",
"H.",
""
],
[
"Sasaki",
"M.",
""
]
] | Using the post-Newtonian (PN) expansion technique of the gravitational wave perturbation around a Schwarzschild black hole, we calculate analytically the energy flux of gravitational waves induced by a particle in circular orbits up to the 5.5PN order, i.e. $O(v^{11})$ beyond Newtonian. By comparing the formula with nu... |
gr-qc/0505144 | Ranjan Sharma | R Sharma, S Karmakar and S Mukherjee | Maximum mass of a cold compact star | 18 pages including 4 *.eps figures. Submitted for publication | Int.J.Mod.Phys. D15 (2006) 405-418 | 10.1142/S0218271806008012 | null | gr-qc | null | We calculate the maximum mass of the class of compact stars described by
Vaidya-Tikekar \cite{VT01} model. The model permits a simple method of
systematically fixing bounds on the maximum possible mass of cold compact stars
with a given value of radius or central density or surface density. The
relevant equations of ... | [
{
"created": "Sun, 29 May 2005 13:56:22 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Sharma",
"R",
""
],
[
"Karmakar",
"S",
""
],
[
"Mukherjee",
"S",
""
]
] | We calculate the maximum mass of the class of compact stars described by Vaidya-Tikekar \cite{VT01} model. The model permits a simple method of systematically fixing bounds on the maximum possible mass of cold compact stars with a given value of radius or central density or surface density. The relevant equations of st... |
gr-qc/9905067 | Jorge Pullin | Reinaldo Gleiser, Gaurav Khanna, Jorge Pullin | Perturbative evolution of conformally flat initial data for a single
boosted black hole | 11 pages, RevTex, 4 figures included with psfig, to appear in PRD | Phys.Rev. D66 (2002) 024035 | 10.1103/PhysRevD.66.024035 | CGPG-99/5-2 | gr-qc | null | The conformally flat families of initial data typically used in numerical
relativity to represent boosted black holes are not those of a boosted slice of
the Schwarzschild spacetime. If such data are used for each black hole in a
collision, the emitted radiation will be partially due to the ``relaxation'' of
the indi... | [
{
"created": "Wed, 19 May 1999 03:30:50 GMT",
"version": "v1"
},
{
"created": "Sat, 27 Nov 1999 15:45:51 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Jul 2002 18:50:42 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Gleiser",
"Reinaldo",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Pullin",
"Jorge",
""
]
] | The conformally flat families of initial data typically used in numerical relativity to represent boosted black holes are not those of a boosted slice of the Schwarzschild spacetime. If such data are used for each black hole in a collision, the emitted radiation will be partially due to the ``relaxation'' of the indivi... |
gr-qc/0208044 | Robert Mann | F.J. Burnell, R.B. Mann, T. Ohta | Chaos in a Relativistic 3-body Self-Gravitating System | 9 pages, LaTex, 3 figures, final version to appear in Phys. Rev. Lett | Phys.Rev.Lett. 90 (2003) 134101 | 10.1103/PhysRevLett.90.134101 | WATPHYS-TH02/07 | gr-qc astro-ph physics.atom-ph | null | We consider the 3-body problem in relativistic lineal gravity and obtain an
exact expression for its Hamiltonian and equations of motion. While
general-relativistic effects yield more tightly-bound orbits of higher
frequency compared to their non-relativistic counterparts, as energy increases
we find in the equal-mas... | [
{
"created": "Fri, 16 Aug 2002 18:28:51 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Aug 2002 20:14:41 GMT",
"version": "v2"
},
{
"created": "Mon, 3 Mar 2003 20:14:55 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Burnell",
"F. J.",
""
],
[
"Mann",
"R. B.",
""
],
[
"Ohta",
"T.",
""
]
] | We consider the 3-body problem in relativistic lineal gravity and obtain an exact expression for its Hamiltonian and equations of motion. While general-relativistic effects yield more tightly-bound orbits of higher frequency compared to their non-relativistic counterparts, as energy increases we find in the equal-mass ... |
gr-qc/0110113 | Ignatov Alexander | A.M. Ignatov | The Gravitational Cherenkov Radiation | 9 pages, 1 figure, LaTeX2e | null | null | null | gr-qc | null | An example of discontinuity of the energy-momentum tensor moving at
superluminal velocity is discussed. It is shown that the gravitational Mach
cone is formed. The power spectrum of the corresponding Cherenkov radiation is
evaluated.
| [
{
"created": "Fri, 26 Oct 2001 09:09:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ignatov",
"A. M.",
""
]
] | An example of discontinuity of the energy-momentum tensor moving at superluminal velocity is discussed. It is shown that the gravitational Mach cone is formed. The power spectrum of the corresponding Cherenkov radiation is evaluated. |
1801.04506 | Anand S. Sengupta | Sumeet Kulkarni, Khun Sang Phukon, Amit Reza, Sukanta Bose, Anirban
Dasgupta, Dilip Krishnaswamy, Anand S. Sengupta | Random projections in gravitational wave searches of compact binaries | Matches the published version in Physical Review D (Rapid
Communication) Phys. Rev. D 99, 101503(R) (2019) | Phys. Rev. D 99, 101503 (2019) | 10.1103/PhysRevD.99.101503 | LIGO-P1700443-v2 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Random projection (RP) is a powerful dimension reduction technique widely
used in the analysis of high dimensional data. We demonstrate how this
technique can be used to improve the computational efficiency of gravitational
wave searches from compact binaries of neutron stars or black holes.
Improvements in low-frequ... | [
{
"created": "Sun, 14 Jan 2018 03:30:45 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Jan 2018 15:20:01 GMT",
"version": "v2"
},
{
"created": "Fri, 21 Dec 2018 05:53:37 GMT",
"version": "v3"
},
{
"created": "Mon, 10 Jun 2019 06:01:34 GMT",
"version": "v4"
}
] | 2019-06-11 | [
[
"Kulkarni",
"Sumeet",
""
],
[
"Phukon",
"Khun Sang",
""
],
[
"Reza",
"Amit",
""
],
[
"Bose",
"Sukanta",
""
],
[
"Dasgupta",
"Anirban",
""
],
[
"Krishnaswamy",
"Dilip",
""
],
[
"Sengupta",
"Anand S.",
""
]... | Random projection (RP) is a powerful dimension reduction technique widely used in the analysis of high dimensional data. We demonstrate how this technique can be used to improve the computational efficiency of gravitational wave searches from compact binaries of neutron stars or black holes. Improvements in low-frequen... |
gr-qc/0501004 | Steven Detweiler | Steven Detweiler | Perspective on gravitational self-force analyses | 40 pages, to appear in a special issue of CQG on radiation reaction,
contains additional references, improved notation for tensor harmonics | Class.Quant.Grav.22:S681-S716,2005 | 10.1088/0264-9381/22/15/006 | null | gr-qc | null | A point particle of mass $\mu$ moving on a geodesic creates a perturbation
$h_{ab}$, of the spacetime metric $g_{ab}$, that diverges at the particle.
Simple expressions are given for the singular $\mu/r$ part of $h_{ab}$ and its
distortion caused by the spacetime. This singular part $h^\SS_{ab}$ is
described in diffe... | [
{
"created": "Mon, 3 Jan 2005 19:00:13 GMT",
"version": "v1"
},
{
"created": "Tue, 24 May 2005 20:11:43 GMT",
"version": "v2"
}
] | 2010-05-12 | [
[
"Detweiler",
"Steven",
""
]
] | A point particle of mass $\mu$ moving on a geodesic creates a perturbation $h_{ab}$, of the spacetime metric $g_{ab}$, that diverges at the particle. Simple expressions are given for the singular $\mu/r$ part of $h_{ab}$ and its distortion caused by the spacetime. This singular part $h^\SS_{ab}$ is described in differe... |
gr-qc/9810040 | Uchida Gen | Uchida Gen and Tetsuya Shiromizu | Asymptotic Schwarzschild Spacetimes | 10 pages, no figures, submitted to J. Math. Phys | J.Math.Phys. 40 (1999) 2021-2031 | 10.1063/1.532848 | OUTAP-85, DAMTP-1998-138, UTAP-304, RESEU-52/98 | gr-qc | null | It is shown that if an asymptotically flat spacetime is asymptotically
stationary, in the sense that $\Lie_{\xi} g_{ab}$ vanishes at the rate $\sim
t^{-3}$ for asymptotically timelike vector field $\xi^a$, and the
energy-momentum tensor vanishes at the rate $\sim t^{-4}$, then the spacetime
is an asymptotically Schwa... | [
{
"created": "Sun, 11 Oct 1998 13:14:58 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Gen",
"Uchida",
""
],
[
"Shiromizu",
"Tetsuya",
""
]
] | It is shown that if an asymptotically flat spacetime is asymptotically stationary, in the sense that $\Lie_{\xi} g_{ab}$ vanishes at the rate $\sim t^{-3}$ for asymptotically timelike vector field $\xi^a$, and the energy-momentum tensor vanishes at the rate $\sim t^{-4}$, then the spacetime is an asymptotically Schwarz... |
2209.11011 | Md Sabir Ali | Md Sabir Ali, Sourav Bhattacharya and Shagun Kaushal | Stationary black holes and stars in the Brans-Dicke theory with $\Lambda
>0$ revisited | v3; 10pp, 4 figs; Accepted for publication in Physical Review D
(Letter) | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was shown a few years back that for a stationary regular black hole or
star solution in the Brans-Dicke theory with a positive cosmological constant
$\Lambda$, endowed with a de Sitter or cosmological event horizon in the
asymptotic region, not only there exists no non-trivial field configurations,
but also the in... | [
{
"created": "Thu, 22 Sep 2022 13:49:00 GMT",
"version": "v1"
},
{
"created": "Sat, 1 Oct 2022 07:38:48 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Nov 2022 09:52:15 GMT",
"version": "v3"
}
] | 2022-11-10 | [
[
"Ali",
"Md Sabir",
""
],
[
"Bhattacharya",
"Sourav",
""
],
[
"Kaushal",
"Shagun",
""
]
] | It was shown a few years back that for a stationary regular black hole or star solution in the Brans-Dicke theory with a positive cosmological constant $\Lambda$, endowed with a de Sitter or cosmological event horizon in the asymptotic region, not only there exists no non-trivial field configurations, but also the inve... |
gr-qc/9303004 | null | C.O.Lousto and N.Sanchez | The Quantization of the Spacetime Geometry Generated by Planckian Energy
Particles | 11 pages, Plain TEX | in Cosmology and Particle Physics, V.de Sabbata and Tso-Hsiu Eds,
Kluwer Ac. Publ., Dordrecht (1994), Vol. C427, pp 193-199 | null | null | gr-qc astro-ph hep-th | null | We study the quantization of the curved spacetime created by
ultrarelativistic particles at Planckian energies. We consider a minisuperspace
model based on the classical shock wave metric generated by these particles,
and for which the Wheeler - De Witt equation is solved exactly. The wave
function of the geometry is... | [
{
"created": "Tue, 2 Mar 1993 17:56:37 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Mar 1993 12:15:48 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Lousto",
"C. O.",
""
],
[
"Sanchez",
"N.",
""
]
] | We study the quantization of the curved spacetime created by ultrarelativistic particles at Planckian energies. We consider a minisuperspace model based on the classical shock wave metric generated by these particles, and for which the Wheeler - De Witt equation is solved exactly. The wave function of the geometry is a... |
1408.4258 | Norbert Van den Bergh | Norbert Van den Bergh | Hypersurface homogeneous Killing spinor space-times | 16 pages | null | 10.1088/0264-9381/32/2/025012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I present a complete list of hypersurface homogeneous space-times admitting a
non-null valence two Killing spinor, including a new class admitting only
exceptional Killing tensors. A connection is established with the
classification of locally rotationally symmetric or boost symmetric
space-times.
| [
{
"created": "Tue, 19 Aug 2014 09:07:20 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Bergh",
"Norbert Van den",
""
]
] | I present a complete list of hypersurface homogeneous space-times admitting a non-null valence two Killing spinor, including a new class admitting only exceptional Killing tensors. A connection is established with the classification of locally rotationally symmetric or boost symmetric space-times. |
gr-qc/0606079 | Ulrich Sperhake | Ulrich Sperhake | Binary black-hole evolutions of excision and puncture data | 21 pages, 13 figures, final version accepted for publication in PRD | Phys.Rev.D76:104015,2007 | 10.1103/PhysRevD.76.104015 | null | gr-qc | null | We present a new numerical code developed for the evolution of binary
black-hole spacetimes using different initial data and evolution techniques.
The code is demonstrated to produce state-of-the-art simulations of orbiting
and inspiralling black-hole binaries with convergent waveforms. We also present
the first deta... | [
{
"created": "Mon, 19 Jun 2006 00:34:50 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Oct 2007 01:28:36 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Sperhake",
"Ulrich",
""
]
] | We present a new numerical code developed for the evolution of binary black-hole spacetimes using different initial data and evolution techniques. The code is demonstrated to produce state-of-the-art simulations of orbiting and inspiralling black-hole binaries with convergent waveforms. We also present the first detail... |
gr-qc/0104080 | T. Damour | Thibault Damour | Quantum strings and black holes | 11 pages, plenary talk given at the 9th Marcel Grossmann Meeting on
Recent Developments in Theoretical and Experimental General Relativity,
Gravitation and Relativistic Field Theories, Rome, Italy, 2-9 July 2000 | null | 10.1142/9789812777386_0009 | null | gr-qc | null | The transition between (non supersymmetric) quantum string states and
Schwarzschild black holes is discussed. This transition occurs when the string
coupling $g^2$ (which determines Newton's constant) increases beyond a certain
critical value $g_c^2$. We review a calculation showing that self-gravity
causes a typical... | [
{
"created": "Wed, 25 Apr 2001 13:53:26 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Damour",
"Thibault",
""
]
] | The transition between (non supersymmetric) quantum string states and Schwarzschild black holes is discussed. This transition occurs when the string coupling $g^2$ (which determines Newton's constant) increases beyond a certain critical value $g_c^2$. We review a calculation showing that self-gravity causes a typical s... |
0805.1203 | Giampiero Esposito Dr. | Vincenzo F. Cardone, Giampiero Esposito | Averaging procedure in variable-G cosmologies | 20 pages. In the new version, all original calculations have been
improved, and the presentation has been further improved as well | Gen.Rel.Grav.42:241-259,2010 | 10.1007/s10714-009-0834-6 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Previous work in the literature had built a formalism for spatially averaged
equations for the scale factor, giving rise to an averaged Raychaudhuri
equation and averaged Hamiltonian constraint, which involve a backreaction
source term. The present paper extends these equations to include models with
variable Newton ... | [
{
"created": "Thu, 8 May 2008 17:23:56 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Jul 2008 13:54:38 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Oct 2008 07:34:58 GMT",
"version": "v3"
}
] | 2010-05-12 | [
[
"Cardone",
"Vincenzo F.",
""
],
[
"Esposito",
"Giampiero",
""
]
] | Previous work in the literature had built a formalism for spatially averaged equations for the scale factor, giving rise to an averaged Raychaudhuri equation and averaged Hamiltonian constraint, which involve a backreaction source term. The present paper extends these equations to include models with variable Newton pa... |
1502.04369 | Yvette Welling | Ana Ach\'ucarro and Yvette Welling | Multiple Field Inflation and Signatures of Heavy Physics in the CMB | 88 pages, 26 figures, master thesis | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this master thesis we study multi-field inflation and the UV sensitivity
of certain models of inflation in supergravity. We first introduce inflation
and its current observational status. Then we provide an overview of studies of
multiple field inflation in the literature. We translate between the different
notati... | [
{
"created": "Sun, 15 Feb 2015 21:45:46 GMT",
"version": "v1"
}
] | 2015-02-18 | [
[
"Achúcarro",
"Ana",
""
],
[
"Welling",
"Yvette",
""
]
] | In this master thesis we study multi-field inflation and the UV sensitivity of certain models of inflation in supergravity. We first introduce inflation and its current observational status. Then we provide an overview of studies of multiple field inflation in the literature. We translate between the different notation... |
2210.07331 | Luis Almeida Professor | R. F. Santos, A. C. Amaro Faria Jr, L. G. Almeida | Relativistic Hydrodynamics a brief review of classical and quantum
fluids in relativistic astrophysics | null | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | The objective of this work is to revisit fundamental aspects of relativistic
hydrodynamics, aiming at the construction of a first course in relativistic
hydrodynamics and its applications to astrophysics at the level of end of
undergraduate course and beginning of graduate course. We aim to introduce more
basic conce... | [
{
"created": "Thu, 13 Oct 2022 20:07:52 GMT",
"version": "v1"
}
] | 2022-10-17 | [
[
"Santos",
"R. F.",
""
],
[
"Faria",
"A. C. Amaro",
"Jr"
],
[
"Almeida",
"L. G.",
""
]
] | The objective of this work is to revisit fundamental aspects of relativistic hydrodynamics, aiming at the construction of a first course in relativistic hydrodynamics and its applications to astrophysics at the level of end of undergraduate course and beginning of graduate course. We aim to introduce more basic concept... |
2112.01345 | Renan Magalh\~aes | Renan B. Magalh\~aes, Luiz C. S. Leite, Lu\'is C. B. Crispino | Scattering by deformed black holes | 10 pages, 10 figures | Phys. Rev. D 104, 124006 (2021) | 10.1103/PhysRevD.104.124006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Obtaining black hole solutions in alternative theories of gravity can be a
difficult task due to cumbersome field equations that arise in many of such
theories. In order to study the strong field regime in a model-free approach,
one can consider deformed black hole solutions with additional parameters
beyond mass, ch... | [
{
"created": "Thu, 2 Dec 2021 15:44:44 GMT",
"version": "v1"
}
] | 2021-12-03 | [
[
"Magalhães",
"Renan B.",
""
],
[
"Leite",
"Luiz C. S.",
""
],
[
"Crispino",
"Luís C. B.",
""
]
] | Obtaining black hole solutions in alternative theories of gravity can be a difficult task due to cumbersome field equations that arise in many of such theories. In order to study the strong field regime in a model-free approach, one can consider deformed black hole solutions with additional parameters beyond mass, char... |
1108.4897 | James Lindesay | James Lindesay | Self-consistent solutions of canonical proper self-gravitating quantum
systems | 13 pages, 7 figures | null | 10.1007/s10701-012-9684-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Generic self-gravitating quantum solutions that are not critically dependent
on the specifics of microscopic interactions are presented. The solutions
incorporate curvature effects, are consistent with the universality of gravity,
and have appropriate correspondence with Newtonian gravitation. The results are
consist... | [
{
"created": "Wed, 24 Aug 2011 17:43:26 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Lindesay",
"James",
""
]
] | Generic self-gravitating quantum solutions that are not critically dependent on the specifics of microscopic interactions are presented. The solutions incorporate curvature effects, are consistent with the universality of gravity, and have appropriate correspondence with Newtonian gravitation. The results are consisten... |
0807.4405 | Henrique de Andrade Gomes | Henrique Gomes | Gauge Theory in Riem(M) | Version virtually identical to the one published in J. Math. Phys.
Contains corrections to a crucial proof, and new figures | J.Math.Phys. 52: 082501, 2011 | 10.1063/1.3603990 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the geometrodynamical setting of general relativity in Lagrangian form,
the objects of study are the {\it Riemannian} metrics (and their time
derivatives) over a given 3-manifold $M$. It is our aim in this paper to study
the gauge properties that the space Riem(M) of all metrics over $M$ possesses,
specially as th... | [
{
"created": "Mon, 28 Jul 2008 11:03:13 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jul 2008 21:44:31 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Sep 2008 13:47:06 GMT",
"version": "v3"
},
{
"created": "Tue, 15 Dec 2009 21:59:50 GMT",
"version": "v4"
},
{
"cr... | 2011-09-15 | [
[
"Gomes",
"Henrique",
""
]
] | In the geometrodynamical setting of general relativity in Lagrangian form, the objects of study are the {\it Riemannian} metrics (and their time derivatives) over a given 3-manifold $M$. It is our aim in this paper to study the gauge properties that the space Riem(M) of all metrics over $M$ possesses, specially as they... |
0908.1214 | Ahmad Sheykhi | Ahmad Sheykhi | Brane-Bulk energy exchange and agegraphic dark energy | 13 pages, to appear in IJMPD | Int.J.Mod.Phys.D19:305-316,2010 | 10.1142/S0218271810016427 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | We consider the agegraphic models of dark energy in a braneworld scenario
with brane-bulk energy exchange. We assume that the adiabatic equation for the
dark matter is satisfied while it is violated for the agegraphic dark energy
due to the energy exchange between the brane and the bulk. Our study shows that
with the... | [
{
"created": "Sun, 9 Aug 2009 04:55:03 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Feb 2010 11:31:09 GMT",
"version": "v2"
}
] | 2010-04-29 | [
[
"Sheykhi",
"Ahmad",
""
]
] | We consider the agegraphic models of dark energy in a braneworld scenario with brane-bulk energy exchange. We assume that the adiabatic equation for the dark matter is satisfied while it is violated for the agegraphic dark energy due to the energy exchange between the brane and the bulk. Our study shows that with the b... |
2004.02005 | Khalid Saifullah | Askar Ali and Khalid Saifullah | Lorentz symmetry violating BTZ black holes in massive gravity | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | BTZ black holes provide excellent frameworks for studying theories that are
at the interface of classical and quantum gravity. In this paper we couple the
Riemannian spacetime with the bumblebee field, in the background of massive
gravity, which produces the violation of spontaneous Lorentz symmetry. In this
setup we... | [
{
"created": "Sat, 4 Apr 2020 19:45:33 GMT",
"version": "v1"
}
] | 2020-04-07 | [
[
"Ali",
"Askar",
""
],
[
"Saifullah",
"Khalid",
""
]
] | BTZ black holes provide excellent frameworks for studying theories that are at the interface of classical and quantum gravity. In this paper we couple the Riemannian spacetime with the bumblebee field, in the background of massive gravity, which produces the violation of spontaneous Lorentz symmetry. In this setup we c... |
1308.3401 | Nicola Tamanini | Nicola Tamanini and Tomi S. Koivisto | On the consistency of non-minimally coupled f(R) gravity | 13 pages | null | 10.1103/PhysRevD.88.064052 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Theories with a non-minimal coupling between the space-time curvature and
matter fields introduce an extra force due to the non-conservation of the
matter energy momentum. In the present work the theoretical consistency of such
couplings is studied using a scalar field Lagrangian to model the matter
content. The cond... | [
{
"created": "Thu, 15 Aug 2013 14:11:23 GMT",
"version": "v1"
}
] | 2013-10-02 | [
[
"Tamanini",
"Nicola",
""
],
[
"Koivisto",
"Tomi S.",
""
]
] | Theories with a non-minimal coupling between the space-time curvature and matter fields introduce an extra force due to the non-conservation of the matter energy momentum. In the present work the theoretical consistency of such couplings is studied using a scalar field Lagrangian to model the matter content. The condit... |
2209.14560 | Josef Kluson | J. Kluson and B. Matous | Einstein and Jordan-Frame Covariant Hamiltonians for F(R) Gravity and
Their Canonical Relationships | 17 pages, reference added | null | 10.1088/1361-6382/acbdde | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | This paper is devoted to the analysis of the covariant canonical formalism of
$F(R)$ gravity in Einstein frame. We also find canonical transformation between
covariant canonical formulation of F(R) gravity in Jordan frame and Einstein
frames and we also determine corresponding generating function.
| [
{
"created": "Thu, 29 Sep 2022 05:51:39 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Oct 2022 13:11:58 GMT",
"version": "v2"
}
] | 2023-03-22 | [
[
"Kluson",
"J.",
""
],
[
"Matous",
"B.",
""
]
] | This paper is devoted to the analysis of the covariant canonical formalism of $F(R)$ gravity in Einstein frame. We also find canonical transformation between covariant canonical formulation of F(R) gravity in Jordan frame and Einstein frames and we also determine corresponding generating function. |
2304.10197 | Chevarra Hansraj | Naresh Dadhich, Rituparno Goswami and Chevarra Hansraj | The Buchdahl Bound Denotes The Geometrical Virial Theorem | 15 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we geometrically establish yet another correspondence between
Newtonian mechanics and general relativity by connecting the Buchdahl bound and
the Virial theorem. Buchdahl stars are defined by the saturation of the
Buchdahl bound, $\Phi(R) \leq 4/9$ where $\Phi(R)$ is the gravitational
potential felt by... | [
{
"created": "Thu, 20 Apr 2023 10:29:05 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Jun 2024 14:05:20 GMT",
"version": "v2"
}
] | 2024-06-18 | [
[
"Dadhich",
"Naresh",
""
],
[
"Goswami",
"Rituparno",
""
],
[
"Hansraj",
"Chevarra",
""
]
] | In this paper, we geometrically establish yet another correspondence between Newtonian mechanics and general relativity by connecting the Buchdahl bound and the Virial theorem. Buchdahl stars are defined by the saturation of the Buchdahl bound, $\Phi(R) \leq 4/9$ where $\Phi(R)$ is the gravitational potential felt by a... |
1804.10380 | Cosimo Bambi | Ashutosh Tripathi, Sourabh Nampalliwar, Askar B. Abdikamalov, Dimitry
Ayzenberg, Jiachen Jiang, Cosimo Bambi | Testing the Kerr nature of the supermassive black hole in Ark 564 | 7 pages, 2 figures. v2: refereed version | Phys. Rev. D 98, 023018 (2018) | 10.1103/PhysRevD.98.023018 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein's theory of general relativity has been extensively tested in weak
gravitational fields, mainly with experiments in the Solar System and
observations of radio pulsars, and current data agree well with the theoretical
predictions. Nevertheless, there are a number of scenarios beyond Einstein's
gravity that ha... | [
{
"created": "Fri, 27 Apr 2018 08:15:36 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Jul 2018 18:53:56 GMT",
"version": "v2"
}
] | 2018-07-30 | [
[
"Tripathi",
"Ashutosh",
""
],
[
"Nampalliwar",
"Sourabh",
""
],
[
"Abdikamalov",
"Askar B.",
""
],
[
"Ayzenberg",
"Dimitry",
""
],
[
"Jiang",
"Jiachen",
""
],
[
"Bambi",
"Cosimo",
""
]
] | Einstein's theory of general relativity has been extensively tested in weak gravitational fields, mainly with experiments in the Solar System and observations of radio pulsars, and current data agree well with the theoretical predictions. Nevertheless, there are a number of scenarios beyond Einstein's gravity that have... |
0809.2369 | Theodore A. Jacobson | Ted Jacobson and Yee-Ann Soong | Slices of the Kerr ergosurface | 13 pages, 6 figures; v.2: minor editing for clarification, references
added, typos fixed, version published in Classical and Quantum Gravity | Class.Quant.Grav.26:055014,2009 | 10.1088/0264-9381/26/5/055014 | null | gr-qc astro-ph hep-th math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The intrinsic geometry of the Kerr ergosurface on constant Boyer-Lindquist
(BL), Kerr, and Doran time slices is characterized. Unlike the BL slice, which
had been previously studied, the other slices (i) do not have conical
singularities at the poles (except the Doran slice in the extremal limit), (ii)
have finite po... | [
{
"created": "Sat, 13 Sep 2008 21:09:40 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Feb 2009 02:32:49 GMT",
"version": "v2"
}
] | 2009-02-20 | [
[
"Jacobson",
"Ted",
""
],
[
"Soong",
"Yee-Ann",
""
]
] | The intrinsic geometry of the Kerr ergosurface on constant Boyer-Lindquist (BL), Kerr, and Doran time slices is characterized. Unlike the BL slice, which had been previously studied, the other slices (i) do not have conical singularities at the poles (except the Doran slice in the extremal limit), (ii) have finite pola... |
2203.04014 | Virgo Publications | F. Acernese, M. Agathos, A. Ain, S. Albanesi, A. Allocca, A. Amato, T.
Andrade, N. Andres, M. Andr\'es-Carcasona, T. Andri\'c, S. Ansoldi, S.
Antier, T. Apostolatos, E. Z. Appavuravther, M. Ar\`ene, N. Arnaud, M.
Assiduo, S. Assis de Souza Melo, P. Astone, F. Aubin, T. Avgitas, S. Babak,
F. Badaracco, M. K. M. ... | The Virgo O3 run and the impact of the environment | 49 pages, 27 figures. Published in Classical and Quantum Grav | null | 10.1088/1361-6382/ac776a | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | Sources of geophysical noise (such as wind, sea waves and earthquakes) or of
anthropogenic noise impact ground-based gravitational-wave interferometric
detectors, causing transient sensitivity worsening and gaps in data taking.
During the one year-long third Observing Run (O3: from April 01, 2019 to March
27, 2020), ... | [
{
"created": "Tue, 8 Mar 2022 11:12:25 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jan 2023 23:18:21 GMT",
"version": "v2"
}
] | 2023-01-05 | [
[
"Acernese",
"F.",
""
],
[
"Agathos",
"M.",
""
],
[
"Ain",
"A.",
""
],
[
"Albanesi",
"S.",
""
],
[
"Allocca",
"A.",
""
],
[
"Amato",
"A.",
""
],
[
"Andrade",
"T.",
""
],
[
"Andres",
"N.",
""
... | Sources of geophysical noise (such as wind, sea waves and earthquakes) or of anthropogenic noise impact ground-based gravitational-wave interferometric detectors, causing transient sensitivity worsening and gaps in data taking. During the one year-long third Observing Run (O3: from April 01, 2019 to March 27, 2020), th... |
1907.04506 | Chee Leong Ching | Chee Leong Ching and Wei Khim Ng | Deformed Gazeau-Klauder Schr\"odinger-Cat States with Modified
Commutation Relations | 24 pages, 29 figures; version to be appeared in Phy.Rev.D | Phys. Rev. D 100, 085018 (2019) | 10.1103/PhysRevD.100.085018 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Generalized coherent states (GCs) under deformed quantum mechanics which
exhibits intrinsic minimum length and maximum momentum have been well studied
following Gazeau-Klauder approach. In this paper, as an extension to the study
of quantum deformation, we investigate the famous Schrodinger cat states (SCs)
under the... | [
{
"created": "Wed, 10 Jul 2019 04:53:00 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Oct 2019 03:19:43 GMT",
"version": "v2"
}
] | 2019-10-30 | [
[
"Ching",
"Chee Leong",
""
],
[
"Ng",
"Wei Khim",
""
]
] | Generalized coherent states (GCs) under deformed quantum mechanics which exhibits intrinsic minimum length and maximum momentum have been well studied following Gazeau-Klauder approach. In this paper, as an extension to the study of quantum deformation, we investigate the famous Schrodinger cat states (SCs) under these... |
2004.07867 | Bruno Barros | Bruno J. Barros, Tiago Barreiro, Tomi Koivisto, Nelson J. Nunes | Testing $F(Q)$ gravity with redshift space distortions | 6 pages, 5 figures | Physics of the Dark Universe 30 (2020) 100616 | 10.1016/j.dark.2020.100616 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Bayesian statistical analysis using redshift space distortions data is
performed to test a model of Symmetric Teleparallel Gravity where gravity is
non-metrical. The cosmological background mimics a $\Lambda$CDM evolution but
differences arise in the perturbations. The linear matter fluctuations are
numerically evo... | [
{
"created": "Thu, 16 Apr 2020 18:24:12 GMT",
"version": "v1"
}
] | 2020-06-15 | [
[
"Barros",
"Bruno J.",
""
],
[
"Barreiro",
"Tiago",
""
],
[
"Koivisto",
"Tomi",
""
],
[
"Nunes",
"Nelson J.",
""
]
] | A Bayesian statistical analysis using redshift space distortions data is performed to test a model of Symmetric Teleparallel Gravity where gravity is non-metrical. The cosmological background mimics a $\Lambda$CDM evolution but differences arise in the perturbations. The linear matter fluctuations are numerically evolv... |
gr-qc/0505005 | Gregory L. Comer | G. L. Comer | Superfluid Analog of the Davies-Unruh Effect | The work presented here is unpublished, and not otherwise available.
The original preprint is of some historic interest: it was one of the
earliest articles in the modern, post-1990 revival of ``analog models'' for
curved spacetime | null | null | null | gr-qc cond-mat.other | null | We produce an analog of the Davies-Unruh effect for superfluid helium four.
There are two temperatures which result--one is associated with ordinary, or
first, sound and the other with second sound.
| [
{
"created": "Sun, 1 May 2005 13:45:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Comer",
"G. L.",
""
]
] | We produce an analog of the Davies-Unruh effect for superfluid helium four. There are two temperatures which result--one is associated with ordinary, or first, sound and the other with second sound. |
1812.08910 | Zack Carson | Zack Carson, Andrew W. Steiner, Kent Yagi | Constraining nuclear matter parameters with GW170817 | 15 pages, 14 figures; Updated the section on computing the EoS
scattering uncertainty to include a more comprehensive error analysis; Fixed
issue with incorrect EoSs plotted in Fig. 3; Fixed a small mistake on nuclear
matter bounds; Used conditional probability distributions rather than 2D ones
to compute nucle... | Phys. Rev. D 99, 043010 (2019) | 10.1103/PhysRevD.99.043010 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The tidal measurement of gravitational waves from the binary neutron star
merger event GW170817 allows us to probe nuclear physics that suffers less from
astrophysical systematics compared to neutron star radius measurements with
electromagnetic wave observations. A recent work found strong correlation among
neutron-... | [
{
"created": "Fri, 21 Dec 2018 01:57:48 GMT",
"version": "v1"
},
{
"created": "Sun, 3 Feb 2019 15:16:19 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Feb 2019 14:16:00 GMT",
"version": "v3"
},
{
"created": "Mon, 3 Feb 2020 01:25:53 GMT",
"version": "v4"
},
{
"crea... | 2021-01-19 | [
[
"Carson",
"Zack",
""
],
[
"Steiner",
"Andrew W.",
""
],
[
"Yagi",
"Kent",
""
]
] | The tidal measurement of gravitational waves from the binary neutron star merger event GW170817 allows us to probe nuclear physics that suffers less from astrophysical systematics compared to neutron star radius measurements with electromagnetic wave observations. A recent work found strong correlation among neutron-st... |
0810.0604 | Stefan Hild | Stefan Hild, Simon Chelkowski and Andreas Freise | Pushing towards the ET sensitivity using 'conventional' technology | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, the design study `Einstein gravitational wave Telescope' (ET) has
been funded within the European FP7 framework. The ambitious goal of this
project is to provide a conceptual design of a detector with a hundred times
better sensitivity than currently operating instruments. It is expected that
this will requ... | [
{
"created": "Fri, 3 Oct 2008 10:02:40 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Nov 2008 09:40:48 GMT",
"version": "v2"
}
] | 2008-11-24 | [
[
"Hild",
"Stefan",
""
],
[
"Chelkowski",
"Simon",
""
],
[
"Freise",
"Andreas",
""
]
] | Recently, the design study `Einstein gravitational wave Telescope' (ET) has been funded within the European FP7 framework. The ambitious goal of this project is to provide a conceptual design of a detector with a hundred times better sensitivity than currently operating instruments. It is expected that this will requir... |
gr-qc/9609001 | Jarmo M. Makela | Jarmo Makela (DAMTP, Cambridge) | Black Hole Spectrum: Continuous or Discrete? | 7 pages, no figures | Phys.Lett. B390 (1997) 115-118 | 10.1016/S0370-2693(96)01376-7 | null | gr-qc | null | We formulate a qualitative argument, based on Heisenberg's uncertainty
principle, to support the claim that when the effects of matter fields are
assumed to overshadow the effects of quantum mechanics of spacetime, the
discrete spectrum of black hole radiation, as such as predicted by Bekenstein's
proposal for a disc... | [
{
"created": "Fri, 30 Aug 1996 09:33:10 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Makela",
"Jarmo",
"",
"DAMTP, Cambridge"
]
] | We formulate a qualitative argument, based on Heisenberg's uncertainty principle, to support the claim that when the effects of matter fields are assumed to overshadow the effects of quantum mechanics of spacetime, the discrete spectrum of black hole radiation, as such as predicted by Bekenstein's proposal for a discre... |
1512.07057 | Joan Josep Ferrando | Joan Josep Ferrando and Juan Antonio S\'aez | Null conformal Killing-Yano tensors and Birkhoff theorem | 10 pages | Gen Relativ Gravit (2016) 48:40 | 10.1007/s10714-016-2036-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the space-times admitting a null conformal Killing-Yano tensor whose
divergence defines a Killing vector. We analyze the similitudes and differences
with the recently studied non null case (Gen. Relativ. Grav. (2015) {\bf 47}
1911). The results by Barnes concerning the Birkhoff theorem for the case of
null o... | [
{
"created": "Tue, 22 Dec 2015 12:37:18 GMT",
"version": "v1"
}
] | 2017-01-19 | [
[
"Ferrando",
"Joan Josep",
""
],
[
"Sáez",
"Juan Antonio",
""
]
] | We study the space-times admitting a null conformal Killing-Yano tensor whose divergence defines a Killing vector. We analyze the similitudes and differences with the recently studied non null case (Gen. Relativ. Grav. (2015) {\bf 47} 1911). The results by Barnes concerning the Birkhoff theorem for the case of null orb... |
1403.2565 | Simone Calogero | H{\aa}kan Andr\'easson, Simone Calogero | Spherically symmetric steady states of John elastic bodies in general
relativity | 25 pages, 11 figures. The title has been changed to match the
published version. References added | null | 10.1088/0264-9381/31/16/165008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study some properties of static spherically symmetric elastic bodies in
general relativity using both analytical and numerical tools. The materials
considered belong to the class of John elastic materials and reduce to perfect
fluids when the rigidity parameter is set to zero. We find numerical support
that such e... | [
{
"created": "Tue, 11 Mar 2014 13:12:32 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Jun 2014 10:06:03 GMT",
"version": "v2"
}
] | 2015-06-19 | [
[
"Andréasson",
"Håkan",
""
],
[
"Calogero",
"Simone",
""
]
] | We study some properties of static spherically symmetric elastic bodies in general relativity using both analytical and numerical tools. The materials considered belong to the class of John elastic materials and reduce to perfect fluids when the rigidity parameter is set to zero. We find numerical support that such ela... |
2308.13131 | Songbai Chen | Yunzhu Wei, Songbai Chen, Jiliang Jing | Thick accretion disk configurations around a compact object in the
brane-world scenario | 13 pages, 7 figures, Accepted by Commun. Theor. Phys | Commun. Theor. Phys. 75,115401(2023) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have studied equipotential surfaces of a thick accretion disk around a
Casadio-Fabbri-Mazzacurati (CFM) compact object in the brane-world scenario,
which owns a mass parameter together with a parameterized post-newtonian (PPN)
parameter. With the increase of the PPN parameter, the size of the thick
accretion disk ... | [
{
"created": "Fri, 25 Aug 2023 01:26:31 GMT",
"version": "v1"
}
] | 2023-10-04 | [
[
"Wei",
"Yunzhu",
""
],
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | We have studied equipotential surfaces of a thick accretion disk around a Casadio-Fabbri-Mazzacurati (CFM) compact object in the brane-world scenario, which owns a mass parameter together with a parameterized post-newtonian (PPN) parameter. With the increase of the PPN parameter, the size of the thick accretion disk de... |
2205.01619 | E. R. Bezerra de Mello | A. A. Saharian, R. M. Avagyan, E. R. Bezerra de Mello, V. Kh.
Kotanjyan, T. A. Petrosyan, H. G. Babujyan | Cosmological evolution with negative energy densities | 12 pages, 3 figures. Discussion and references added, accepted for
publication in Astrophysics | null | 10.1007/s10511-022-09751-1 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For general number of spatial dimensions we investigate the cosmological
dynamics driven by a cosmological constant and by a source with barotropic
equation of state. It is assumed that for both those sources the energy density
can be either positive or negative. Exact solutions of the cosmological
equations are prov... | [
{
"created": "Tue, 3 May 2022 16:55:11 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jul 2022 12:13:58 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Aug 2022 18:01:05 GMT",
"version": "v3"
}
] | 2022-11-09 | [
[
"Saharian",
"A. A.",
""
],
[
"Avagyan",
"R. M.",
""
],
[
"de Mello",
"E. R. Bezerra",
""
],
[
"Kotanjyan",
"V. Kh.",
""
],
[
"Petrosyan",
"T. A.",
""
],
[
"Babujyan",
"H. G.",
""
]
] | For general number of spatial dimensions we investigate the cosmological dynamics driven by a cosmological constant and by a source with barotropic equation of state. It is assumed that for both those sources the energy density can be either positive or negative. Exact solutions of the cosmological equations are provid... |
gr-qc/0203002 | Farid Ya. Khalili | F.Ya.Khalili | The "optical lever" intracavity readout scheme for gravitational-wave
antennae | 10 pages, 3 figures | Phys.Lett. A298 (2002) 308-314 | 10.1016/S0375-9601(02)00578-9 | null | gr-qc | null | An improved version of the ``optical bar'' intracavity readout scheme for
gravitational-wave antennae is considered. We propose to call this scheme
``optical lever'' because it can provide significant gain in the signal
displacement of the local mirror similar to the gain which can be obtained
using ordinary mechanic... | [
{
"created": "Fri, 1 Mar 2002 11:31:41 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Khalili",
"F. Ya.",
""
]
] | An improved version of the ``optical bar'' intracavity readout scheme for gravitational-wave antennae is considered. We propose to call this scheme ``optical lever'' because it can provide significant gain in the signal displacement of the local mirror similar to the gain which can be obtained using ordinary mechanical... |
0705.0221 | Farook Rahaman | F. Rahaman and R. Mondal | Non static Global monopole in Lyra geometry | 7 pages | FizikaB16:223-230,2007 | null | null | gr-qc | null | A class of non static solutions around a global monopole resulting from the
breaking of a global S0(3) symmetry based on Lyra geometry are obtained. The
solutions are obtained using the functional separability of the metric
coefficients. We have shown that the monopole exerts attractive gravitational
effects on test ... | [
{
"created": "Wed, 2 May 2007 08:19:02 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Rahaman",
"F.",
""
],
[
"Mondal",
"R.",
""
]
] | A class of non static solutions around a global monopole resulting from the breaking of a global S0(3) symmetry based on Lyra geometry are obtained. The solutions are obtained using the functional separability of the metric coefficients. We have shown that the monopole exerts attractive gravitational effects on test pa... |
2404.11904 | Leo Medeiros Gouvea | R. R. Cuzinatto, L. G. Medeiros | Inflationary dynamics in modified gravity models | 11 pages, 4 figures. Chapter in: "Tribute to Ruben Aldrovandi", F.
Caruso, J.G. Pereira, A. Santoro (eds.) (Editora Livraria da F\'isica, S\~ao
Paulo, 2024), pages 135-151 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Higher-order theories of gravity are a branch of modified gravity wherein the
geometrodynamics of the four-dimensional Riemannian manifold is determined by
field equations involving derivatives of the metric tensor of order higher than
two. This paper considers a general action built with the Einstein-Hilbert term
pl... | [
{
"created": "Thu, 18 Apr 2024 05:08:31 GMT",
"version": "v1"
}
] | 2024-04-19 | [
[
"Cuzinatto",
"R. R.",
""
],
[
"Medeiros",
"L. G.",
""
]
] | Higher-order theories of gravity are a branch of modified gravity wherein the geometrodynamics of the four-dimensional Riemannian manifold is determined by field equations involving derivatives of the metric tensor of order higher than two. This paper considers a general action built with the Einstein-Hilbert term plus... |
2301.03921 | Job Furtado Neto | R. D\'arlla, F.A. Brito, J. Furtado | Black String solutions in Rainbow Gravity | 6 pages, 5 figures, two columns | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper we study black string solutions under the consideration of
rainbow gravity. We have analytically obtained the solution for
four-dimensional black strings in terms of the functions $f(E/E_p)$ and
$g(E/E_p)$ that sets the energy scale where the rainbow gravity becomes
relevant. We have also obtained the H... | [
{
"created": "Tue, 10 Jan 2023 11:52:15 GMT",
"version": "v1"
}
] | 2023-01-11 | [
[
"Dárlla",
"R.",
""
],
[
"Brito",
"F. A.",
""
],
[
"Furtado",
"J.",
""
]
] | In this paper we study black string solutions under the consideration of rainbow gravity. We have analytically obtained the solution for four-dimensional black strings in terms of the functions $f(E/E_p)$ and $g(E/E_p)$ that sets the energy scale where the rainbow gravity becomes relevant. We have also obtained the Haw... |
1804.00660 | Deyan Mihaylov | Deyan P. Mihaylov and Christopher J. Moore and Jonathan R. Gair and
Anthony Lasenby and Gerard Gilmore | Astrometric Effects of Gravitational Wave Backgrounds with
non-Einsteinian Polarizations | 14 pages, 12 figures | Phys. Rev. D 97, 124058 (2018) | 10.1103/PhysRevD.97.124058 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Gaia mission offers a new opportunity to search for the low frequency
gravitational wave background using astrometric measurements. In this paper,
the astrometric effect of gravitational waves is reviewed, with a particular
focus on the effect of non-Einsteinian gravitational wave polarizations. A
stochastic grav... | [
{
"created": "Mon, 2 Apr 2018 18:00:00 GMT",
"version": "v1"
}
] | 2018-06-27 | [
[
"Mihaylov",
"Deyan P.",
""
],
[
"Moore",
"Christopher J.",
""
],
[
"Gair",
"Jonathan R.",
""
],
[
"Lasenby",
"Anthony",
""
],
[
"Gilmore",
"Gerard",
""
]
] | The Gaia mission offers a new opportunity to search for the low frequency gravitational wave background using astrometric measurements. In this paper, the astrometric effect of gravitational waves is reviewed, with a particular focus on the effect of non-Einsteinian gravitational wave polarizations. A stochastic gravit... |
1401.6888 | Daniel Siegel | Daniel M. Siegel and Markus Roth | An upper bound from helioseismology on the stochastic background of
gravitational waves | 6 pages, 2 figures. Updated to match published version | ApJ, 784, 88 (2014) | 10.1088/0004-637X/784/2/88 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The universe is expected to be permeated by a stochastic background of
gravitational radiation of astrophysical and cosmological origin. This
background is capable of exciting oscillations in solar-like stars. Here we
show that solar-like oscillators can be employed as giant hydrodynamical
detectors for such a backgr... | [
{
"created": "Mon, 27 Jan 2014 15:16:56 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Mar 2014 23:20:03 GMT",
"version": "v2"
}
] | 2014-04-01 | [
[
"Siegel",
"Daniel M.",
""
],
[
"Roth",
"Markus",
""
]
] | The universe is expected to be permeated by a stochastic background of gravitational radiation of astrophysical and cosmological origin. This background is capable of exciting oscillations in solar-like stars. Here we show that solar-like oscillators can be employed as giant hydrodynamical detectors for such a backgrou... |
1610.08118 | Ali \"Ovg\"un | Ali \"Ovg\"un | Studies on Thin-shells and Thin-shell Wormholes | 77 pages, 12 figures, Ph.D Supervisor: Prof. Dr. Mustafa Halilsoy,
Ph.D Thesis in Physics defended at Eastern Mediterranean University,
Famagusta T.R. North Cyprus (June 2016) | null | 10.13140/RG.2.1.2655.8966/1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The study of traversable wormholes is very hot topic for the past 30 years.
One of the best possible way to make traversable wormhole is using the
thin-shells to cut and paste two spacetime which has tunnel from one region of
space-time to another, through which a traveler might freely pass in wormhole
throat. These ... | [
{
"created": "Tue, 25 Oct 2016 23:32:35 GMT",
"version": "v1"
}
] | 2016-10-27 | [
[
"Övgün",
"Ali",
""
]
] | The study of traversable wormholes is very hot topic for the past 30 years. One of the best possible way to make traversable wormhole is using the thin-shells to cut and paste two spacetime which has tunnel from one region of space-time to another, through which a traveler might freely pass in wormhole throat. These ge... |
1405.5033 | Hamid Reza Sepangi | M. Khodadi and H. R. Sepangi | Cosmological QCD phase transition in steady non-equilibrium dissipative
Ho\v{r}ava-Lifshitz early universe | 21 pages, 16 figures | Annals of Physics, 346 (2014) 129 | 10.1016/j.aop.2014.04.012 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the phase transition from quark-gluon plasma to hadrons in the early
universe in the context of non-equilibrium thermodynamics. According to the
standard model of cosmology, a phase transition associated with chiral symmetry
breaking after the electro-weak transition has occurred when the universe was
about ... | [
{
"created": "Tue, 20 May 2014 11:05:02 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Khodadi",
"M.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | We study the phase transition from quark-gluon plasma to hadrons in the early universe in the context of non-equilibrium thermodynamics. According to the standard model of cosmology, a phase transition associated with chiral symmetry breaking after the electro-weak transition has occurred when the universe was about $1... |
0906.1998 | Peter Dunsby | S Carloni, P K S Dunsby and A Troisi | Cosmological dynamics of fourth order gravity | Review submitted to a volume in honour of S D Odintsov on the
occasion of his 50th birthday | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the dynamical system approach applied to Higher Order Theories of
Gravity. We show that once the theory of gravity has been specified, the
cosmological equations can be written as a first-order autonomous system and we
give several examples which illustrate the utility of our method. We also
discuss a numb... | [
{
"created": "Wed, 10 Jun 2009 19:28:20 GMT",
"version": "v1"
}
] | 2009-06-11 | [
[
"Carloni",
"S",
""
],
[
"Dunsby",
"P K S",
""
],
[
"Troisi",
"A",
""
]
] | We discuss the dynamical system approach applied to Higher Order Theories of Gravity. We show that once the theory of gravity has been specified, the cosmological equations can be written as a first-order autonomous system and we give several examples which illustrate the utility of our method. We also discuss a number... |
1505.00093 | Daoyan Wang | Daoyan Wang | Gravitational Collapse and Black Hole Formation in a Braneworld | PhD thesis, 180 pages. Supervisor: Matthew W. Choptuik,
Co-Supervisor: William G. Unruh | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this thesis we present the first numerical study of gravitational collapse
in braneworlds within the framework of the single brane model proposed by
Randall and Sundrum (RSII). We directly show that the evolutions of
sufficiently strong initial data configurations result in black holes (BHs)
with finite extension ... | [
{
"created": "Fri, 1 May 2015 05:34:31 GMT",
"version": "v1"
}
] | 2015-05-04 | [
[
"Wang",
"Daoyan",
""
]
] | In this thesis we present the first numerical study of gravitational collapse in braneworlds within the framework of the single brane model proposed by Randall and Sundrum (RSII). We directly show that the evolutions of sufficiently strong initial data configurations result in black holes (BHs) with finite extension in... |
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