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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2306.15225 | Tanmoy Paul | Sergei D. Odintsov, Simone D'Onofrio, Tanmoy Paul | Holographic realization from inflation to reheating in generalized
entropic cosmology | "Physics of the Dark Universe" Accepted | null | 10.1016/j.dark.2023.101277 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The growing cosmological interest of different entropy functions (like the
Tsallis entropy, the R\'{e}nyi entropy, the Barrow entropy, the Sharma-Mittal
entropy, the Kaniadakis entropy and the Loop Quantum gravity entropy) naturally
raises an important question: "Does there exist a generalized entropy that can
bring ... | [
{
"created": "Tue, 27 Jun 2023 05:58:04 GMT",
"version": "v1"
}
] | 2023-09-18 | [
[
"Odintsov",
"Sergei D.",
""
],
[
"D'Onofrio",
"Simone",
""
],
[
"Paul",
"Tanmoy",
""
]
] | The growing cosmological interest of different entropy functions (like the Tsallis entropy, the R\'{e}nyi entropy, the Barrow entropy, the Sharma-Mittal entropy, the Kaniadakis entropy and the Loop Quantum gravity entropy) naturally raises an important question: "Does there exist a generalized entropy that can bring al... |
gr-qc/9804046 | David Wands | Karim A. Malik and David Wands | Gauge-Invariant Variables on Cosmological Hypersurfaces | 4 pages, Revtex, no figures | null | null | PU-RCG/98-5 | gr-qc astro-ph | null | We show how gauge-invariant cosmological perturbations may be constructed by
an unambiguous choice of hypersurface-orthogonal time-like vector field (i.e.,
time-slicing). This may be defined either in terms of the metric quantities
such as curvature or shear, or using some matter field. As an example, we show
how lin... | [
{
"created": "Tue, 21 Apr 1998 10:35:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Malik",
"Karim A.",
""
],
[
"Wands",
"David",
""
]
] | We show how gauge-invariant cosmological perturbations may be constructed by an unambiguous choice of hypersurface-orthogonal time-like vector field (i.e., time-slicing). This may be defined either in terms of the metric quantities such as curvature or shear, or using some matter field. As an example, we show how linea... |
gr-qc/0201033 | Salvatore Capozziello | Salvatore Capozziello | Curvature Quintessence | 10 pages, LATEX files, to appear on IJMPD | Int.J.Mod.Phys.D11:483-492,2002 | 10.1142/S0218271802002025 | null | gr-qc | null | The issues of quintessence and cosmic acceleration can be discussed in the
framework of higher order theories of gravity. We can define effective pressure
and energy density directly connected to the Ricci scalar of curvature of a
generic fourth order theory and then ask for the conditions to get an
accelerated expan... | [
{
"created": "Thu, 10 Jan 2002 17:42:19 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Capozziello",
"Salvatore",
""
]
] | The issues of quintessence and cosmic acceleration can be discussed in the framework of higher order theories of gravity. We can define effective pressure and energy density directly connected to the Ricci scalar of curvature of a generic fourth order theory and then ask for the conditions to get an accelerated expansi... |
gr-qc/0602003 | Antonio F. Ranada | Antonio F. Ranada and Alfredo Tiemblo | Time, clocks, parametric invariance and the Pioneer Anomaly | 19 pages, one figure | null | null | null | gr-qc | null | In the context of a parametric theory (with the time being a dynamical
variable) we consider the coupling between the quantum vacuum and the
background gravitation that pervades the universe (unavoidable because of the
universality of gravity). In our model the fourth Heisenberg relation
introduces a possible source ... | [
{
"created": "Wed, 1 Feb 2006 15:30:16 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Nov 2006 15:05:40 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Ranada",
"Antonio F.",
""
],
[
"Tiemblo",
"Alfredo",
""
]
] | In the context of a parametric theory (with the time being a dynamical variable) we consider the coupling between the quantum vacuum and the background gravitation that pervades the universe (unavoidable because of the universality of gravity). In our model the fourth Heisenberg relation introduces a possible source of... |
gr-qc/0112015 | A. R. Prasanna | A.R.Prasanna | Inertial forces - a la Newton in General Relativity | Lecture notes 18 pages including five figs | null | null | null | gr-qc | null | In this we briefly cover the covariant approach to describe inertial forces
in general relativity and in particular look at the behaviour of the cumulative
drag index for stationary Kerr geometry.
| [
{
"created": "Mon, 10 Dec 2001 09:28:28 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Prasanna",
"A. R.",
""
]
] | In this we briefly cover the covariant approach to describe inertial forces in general relativity and in particular look at the behaviour of the cumulative drag index for stationary Kerr geometry. |
2105.00744 | Albert Huber | Albert Huber | A remark on the quasilocal calculation of tidal heating: energy transfer
through the quasilocal surface | extended version; accepted for publication in PRD | Physical Review D 105(2) 2022 | 10.1103/PhysRevD.105.024011 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | In this note, using the quasilocal formalism of Brown and York, the flow of
energy through a closed surface containing a gravitating physical system is
calculated in a way that augments earlier results on the subject by Booth and
Creighton. To this end, by performing a variation of the total gravitational
Hamiltonian... | [
{
"created": "Mon, 3 May 2021 10:41:09 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Dec 2021 07:00:39 GMT",
"version": "v2"
}
] | 2022-01-05 | [
[
"Huber",
"Albert",
""
]
] | In this note, using the quasilocal formalism of Brown and York, the flow of energy through a closed surface containing a gravitating physical system is calculated in a way that augments earlier results on the subject by Booth and Creighton. To this end, by performing a variation of the total gravitational Hamiltonian (... |
2109.04238 | Shaoqi Hou | Shaoqi Hou, Tao Zhu, Zong-Hong Zhu | Gravitational memory effects in Chern-Simons modified gravity | 13 pages, 0 figure. To be published in PRD | Phys. Rev. D 105, 024025 (2022) | 10.1103/PhysRevD.105.024025 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational memory effects of Chern-Simons modified gravity are
considered in the asymptotically flat spacetime. If the Chern-Simons scalar
does not directly couple with the ordinary matter fields, there are also
displacement, spin and center-of-mass memory effects as in general relativity.
This is because the ... | [
{
"created": "Thu, 9 Sep 2021 12:58:25 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Sep 2021 03:18:32 GMT",
"version": "v2"
},
{
"created": "Sun, 2 Jan 2022 13:02:58 GMT",
"version": "v3"
}
] | 2022-01-10 | [
[
"Hou",
"Shaoqi",
""
],
[
"Zhu",
"Tao",
""
],
[
"Zhu",
"Zong-Hong",
""
]
] | The gravitational memory effects of Chern-Simons modified gravity are considered in the asymptotically flat spacetime. If the Chern-Simons scalar does not directly couple with the ordinary matter fields, there are also displacement, spin and center-of-mass memory effects as in general relativity. This is because the te... |
0907.2186 | Michele Maggiore | Umberto Cannella, Stefano Foffa, Michele Maggiore, Hillary Sanctuary
and Riccardo Sturani | Extracting the three- and four-graviton vertices from binary pulsars and
coalescing binaries | 10 pages, 5 figures; v2: an error corrected; references added | null | 10.1103/PhysRevD.80.124035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using a formulation of the post-Newtonian expansion in terms of Feynman
graphs, we discuss how various tests of General Relativity (GR) can be
translated into measurement of the three- and four-graviton vertices. In
problems involving only the conservative dynamics of a system, a deviation of
the three-graviton verte... | [
{
"created": "Mon, 13 Jul 2009 15:14:13 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Nov 2009 19:51:15 GMT",
"version": "v2"
}
] | 2015-05-13 | [
[
"Cannella",
"Umberto",
""
],
[
"Foffa",
"Stefano",
""
],
[
"Maggiore",
"Michele",
""
],
[
"Sanctuary",
"Hillary",
""
],
[
"Sturani",
"Riccardo",
""
]
] | Using a formulation of the post-Newtonian expansion in terms of Feynman graphs, we discuss how various tests of General Relativity (GR) can be translated into measurement of the three- and four-graviton vertices. In problems involving only the conservative dynamics of a system, a deviation of the three-graviton vertex ... |
2003.08448 | Gabriel Andres Piovano | Gabriel Andres Piovano, Andrea Maselli, Paolo Pani | Model independent tests of the Kerr bound with extreme mass ratio
inspirals | Improvements in response to referee reports. Typos corrected. Data
and code available at https://web.uniroma1.it/gmunu | PLB 811 135860 (2020) | 10.1016/j.physletb.2020.135860 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An outstanding prediction of general relativity is the fact that the angular
momentum $S$ of an isolated black hole with mass $\mu$ is limited by the Kerr
bound, $S\leq G\mu^2/c$. Testing this cornerstone is challenging due to the
difficulty in modelling spinning compact objects that violate this bound. We
argue that... | [
{
"created": "Wed, 18 Mar 2020 19:25:48 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Jun 2020 21:55:42 GMT",
"version": "v2"
}
] | 2020-10-22 | [
[
"Piovano",
"Gabriel Andres",
""
],
[
"Maselli",
"Andrea",
""
],
[
"Pani",
"Paolo",
""
]
] | An outstanding prediction of general relativity is the fact that the angular momentum $S$ of an isolated black hole with mass $\mu$ is limited by the Kerr bound, $S\leq G\mu^2/c$. Testing this cornerstone is challenging due to the difficulty in modelling spinning compact objects that violate this bound. We argue that p... |
2201.02754 | Pardyumn Kumar Sahoo | Riasat Ali, Rimsha Babar, P.K. Sahoo | Quantum Gravity Evolution in the Hawking Radiation of a Rotating Regular
Hayward Black Hole | Physics of the Dark Universe accepted version | Physics of the Dark Universe, vol 35 (2022) 100948 | 10.1016/j.dark.2022.100948 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we study two different phenomena (the Newman-Janis algorithm
and the semiclassical Hamilton-Jacobi method) to analyze the Hawking
temperature ($T_H$) for massive $4$-dimensional regular Hayward BH with spin
parameter. First of all, we compute the rotating regular Hayward black hole
solution by taking t... | [
{
"created": "Sat, 8 Jan 2022 04:03:04 GMT",
"version": "v1"
}
] | 2022-01-25 | [
[
"Ali",
"Riasat",
""
],
[
"Babar",
"Rimsha",
""
],
[
"Sahoo",
"P. K.",
""
]
] | In this paper, we study two different phenomena (the Newman-Janis algorithm and the semiclassical Hamilton-Jacobi method) to analyze the Hawking temperature ($T_H$) for massive $4$-dimensional regular Hayward BH with spin parameter. First of all, we compute the rotating regular Hayward black hole solution by taking the... |
1308.2863 | Yu-Xiao Liu | Xiang-Nan Zhou, Xiao-Long Du, Ke Yang, Yu-Xiao Liu | Dirac dynamical resonance states around Schwarzschild black holes | v2: 23 pages, 8 figures, 3 tables, improved version to be published
in Phys. Rev. D | Phys. Rev. D 89, 043006 (2014) | 10.1103/PhysRevD.89.043006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, a novel kind of scalar wigs around Schwarzschild black
holes---scalar dynamical resonance states were introduced in [Phys. Rev. D 84,
083008 (2011)] and [Phys. Rev. Lett. 109, 081102 (2012)]. In this paper, we
investigate the existence and evolution of Dirac dynamical resonance states.
First we look for sta... | [
{
"created": "Tue, 13 Aug 2013 13:30:57 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Aug 2013 10:19:09 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Jan 2014 08:22:12 GMT",
"version": "v3"
}
] | 2014-02-26 | [
[
"Zhou",
"Xiang-Nan",
""
],
[
"Du",
"Xiao-Long",
""
],
[
"Yang",
"Ke",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | Recently, a novel kind of scalar wigs around Schwarzschild black holes---scalar dynamical resonance states were introduced in [Phys. Rev. D 84, 083008 (2011)] and [Phys. Rev. Lett. 109, 081102 (2012)]. In this paper, we investigate the existence and evolution of Dirac dynamical resonance states. First we look for stati... |
1812.10076 | Leron Borsten | L. Borsten, M. J. Duff and A. Marrani | Freudenthal duality and conformal isometries of extremal black holes | null | null | null | DFPD/2018/TH/04, DIAS-STP-18-18, Imperial-TP-2018-MJD-02 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a conformal isometry for static extremal black hole solutions in
all four-dimensional Einstein-Maxwell-scalar theories with electromagnetic
duality groups `of type $E_7$'. This includes, but is not limited to, all
supergravity theories with $\mathcal{N}>2$ supersymmetry and all
$\mathcal{N}=2$ supergravity... | [
{
"created": "Tue, 25 Dec 2018 09:25:37 GMT",
"version": "v1"
}
] | 2018-12-27 | [
[
"Borsten",
"L.",
""
],
[
"Duff",
"M. J.",
""
],
[
"Marrani",
"A.",
""
]
] | We present a conformal isometry for static extremal black hole solutions in all four-dimensional Einstein-Maxwell-scalar theories with electromagnetic duality groups `of type $E_7$'. This includes, but is not limited to, all supergravity theories with $\mathcal{N}>2$ supersymmetry and all $\mathcal{N}=2$ supergravity t... |
0907.4322 | Tomasz Pawlowski | Wojciech Kaminski, Jerzy Lewandowski, Tomasz Pawlowski | Quantum constraints, Dirac observables and evolution: group averaging
versus Schroedinger picture in LQC | RevTex4, 32 pages | Class.Quant.Grav.26:245016,2009 | 10.1088/0264-9381/26/24/245016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general quantum constraint of the form $C= - \partial_T^2 \otimes B -
I\otimes H$ (realized in particular in Loop Quantum Cosmology models) is
studied. Group Averaging is applied to define the Hilbert space of solutions
and the relational Dirac observables. Two cases are considered. In the first
case, the spectrum ... | [
{
"created": "Fri, 24 Jul 2009 16:03:50 GMT",
"version": "v1"
}
] | 2010-04-14 | [
[
"Kaminski",
"Wojciech",
""
],
[
"Lewandowski",
"Jerzy",
""
],
[
"Pawlowski",
"Tomasz",
""
]
] | A general quantum constraint of the form $C= - \partial_T^2 \otimes B - I\otimes H$ (realized in particular in Loop Quantum Cosmology models) is studied. Group Averaging is applied to define the Hilbert space of solutions and the relational Dirac observables. Two cases are considered. In the first case, the spectrum of... |
1603.01406 | Narayan Banerjee | Sachin Pandey and Narayan Banerjee | Unitary evolution for anisotropic quantum cosmologies: models with
variable spatial curvature | 10 pages, no figure | null | 10.1088/0031-8949/91/11/115001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Contrary to the general belief, there has recently been quite a few examples
of unitary evolution of quantum cosmological models. The present work gives
more examples, namely Bianchi type VI and type II. These examples are important
as they involve varying spatial curvature unlike the most talked about
homogeneous bu... | [
{
"created": "Fri, 4 Mar 2016 10:09:16 GMT",
"version": "v1"
}
] | 2016-11-03 | [
[
"Pandey",
"Sachin",
""
],
[
"Banerjee",
"Narayan",
""
]
] | Contrary to the general belief, there has recently been quite a few examples of unitary evolution of quantum cosmological models. The present work gives more examples, namely Bianchi type VI and type II. These examples are important as they involve varying spatial curvature unlike the most talked about homogeneous but ... |
1712.07281 | Lu\'is Filipe Costa | L. Filipe O. Costa, Georgios Lukes-Gerakopoulos, Old\v{r}ich Semer\'ak | Spinning particles in general relativity: Momentum-velocity relation for
the Mathisson-Pirani spin condition | 18 pages, 7 Figures. Slightly improved version, references added,
Figure 4 rescaled. Supplemental material is provided in the ancillary files
"CircularOrbits.nb" and "AdditionalPlots.pdf". Matches the final published
version | Phys. Rev. D 97, 084023 (2018) | 10.1103/PhysRevD.97.084023 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Mathisson-Papapetrou-Dixon (MPD) equations, providing the "pole-dipole"
description of spinning test particles in general relativity, have to be
supplemented by a condition specifying the worldline that will represent the
history of the studied body. It has long been thought that the Mathisson-Pirani
(MP) spin co... | [
{
"created": "Wed, 20 Dec 2017 00:57:20 GMT",
"version": "v1"
},
{
"created": "Wed, 30 May 2018 21:12:29 GMT",
"version": "v2"
}
] | 2018-06-01 | [
[
"Costa",
"L. Filipe O.",
""
],
[
"Lukes-Gerakopoulos",
"Georgios",
""
],
[
"Semerák",
"Oldřich",
""
]
] | The Mathisson-Papapetrou-Dixon (MPD) equations, providing the "pole-dipole" description of spinning test particles in general relativity, have to be supplemented by a condition specifying the worldline that will represent the history of the studied body. It has long been thought that the Mathisson-Pirani (MP) spin cond... |
1211.6326 | Mauricio Bellini | Jes\'us Mart\'in Romero, Mauricio Bellini (IFIMAR - UNMdP & CONICET) | Induced Matter Theory of gravity from a Weitzenb\"ock 5D vacuum and
pre-big bang collapse of the universe | version accepted in European Physical Journal C (16 pages, no
figures) | null | 10.1140/epjc/s10052-013-2317-x | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the Induced Matter Theory of gravity (IMT) to 5D curved spacetimes
by using the Weitzenb\"ock representation of connections on a 5D curved
spacetime. In this representation the 5D curvature tensor becomes null, so that
we can make a static foliation on the extra noncompact coordinate to induce in
the Weitze... | [
{
"created": "Tue, 27 Nov 2012 15:31:54 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Dec 2012 22:53:51 GMT",
"version": "v2"
},
{
"created": "Sat, 12 Jan 2013 14:13:47 GMT",
"version": "v3"
},
{
"created": "Thu, 14 Feb 2013 16:19:29 GMT",
"version": "v4"
}
] | 2022-06-29 | [
[
"Romero",
"Jesús Martín",
"",
"IFIMAR - UNMdP & CONICET"
],
[
"Bellini",
"Mauricio",
"",
"IFIMAR - UNMdP & CONICET"
]
] | We extend the Induced Matter Theory of gravity (IMT) to 5D curved spacetimes by using the Weitzenb\"ock representation of connections on a 5D curved spacetime. In this representation the 5D curvature tensor becomes null, so that we can make a static foliation on the extra noncompact coordinate to induce in the Weitzenb... |
1611.06075 | Nabil Youssef L | M. I. Wanas, Nabil L. Youssef, W. El Hanafy and S. N. Osman | Einstein Geometrization Philosophy and Differential Identities in
PAP-Geometry | LaTeX file, 17 pages, comments and criticism are welcome | Advances in Mathematical Physics, vol. 2016, Article ID 1037849, 8
pages, 2016 | 10.1155/2016/1037849 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The importance of Einstein's geometrization philosophy, as an alternative to
the least action principle, in constructing general relativity (GR), is
illuminated. The role of differential identities in this philosophy is
clarified. The use of Bianchi identity to write the field equations of GR is
shown. Another simila... | [
{
"created": "Fri, 18 Nov 2016 13:53:43 GMT",
"version": "v1"
}
] | 2016-12-05 | [
[
"Wanas",
"M. I.",
""
],
[
"Youssef",
"Nabil L.",
""
],
[
"Hanafy",
"W. El",
""
],
[
"Osman",
"S. N.",
""
]
] | The importance of Einstein's geometrization philosophy, as an alternative to the least action principle, in constructing general relativity (GR), is illuminated. The role of differential identities in this philosophy is clarified. The use of Bianchi identity to write the field equations of GR is shown. Another similar ... |
1905.04299 | Nan Zhang | Nan Zhang, Ya-Bo Wu, Jia-Nan Chi, Zhe Yu, Dong-Fang Xu | Diagnosing Tsallis Holographic Dark Energy models with interactions | 10 pages,6 figures | Modern Physics Letters A Vol. 33, No. 1 (2020) 2050044 | 10.1142/S0217732320500443 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been found that the geometrical diagnostic methods can break the
degeneracy for dark energy models. In this paper, we investigate the $Om$
diagnostic, the statefinder hierarchy $S_{n}$ and the composite null diagnostic
$\{S_{n},\epsilon\}$ for the Tsallis holographic dark energy models with
interactions. We fi... | [
{
"created": "Fri, 10 May 2019 07:45:17 GMT",
"version": "v1"
},
{
"created": "Fri, 24 May 2019 10:11:14 GMT",
"version": "v2"
},
{
"created": "Sun, 24 Nov 2019 14:30:53 GMT",
"version": "v3"
}
] | 2019-11-26 | [
[
"Zhang",
"Nan",
""
],
[
"Wu",
"Ya-Bo",
""
],
[
"Chi",
"Jia-Nan",
""
],
[
"Yu",
"Zhe",
""
],
[
"Xu",
"Dong-Fang",
""
]
] | It has been found that the geometrical diagnostic methods can break the degeneracy for dark energy models. In this paper, we investigate the $Om$ diagnostic, the statefinder hierarchy $S_{n}$ and the composite null diagnostic $\{S_{n},\epsilon\}$ for the Tsallis holographic dark energy models with interactions. We find... |
gr-qc/9805029 | Sanjay Jhingan | I. H. Dwivedi | Photon redshift and the appearance of a naked singularity | Latex file, 14 pages, no figures, one change in the reference.
Accepted for publication in Phys. Rev. D | Phys.Rev. D58 (1998) 064004 | 10.1103/PhysRevD.58.064004 | null | gr-qc | null | In this paper we analyze the redshift as observed by an external observer
receiving photons which terminate in the past at the naked singularity formed
in a Tolman-Bondi dust collapse. Within the context of models considered here
it is shown that photons emitted from a weak curvature naked singularity are
always fini... | [
{
"created": "Sat, 9 May 1998 15:12:49 GMT",
"version": "v1"
},
{
"created": "Wed, 27 May 1998 06:12:52 GMT",
"version": "v2"
},
{
"created": "Thu, 28 May 1998 04:24:37 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Dwivedi",
"I. H.",
""
]
] | In this paper we analyze the redshift as observed by an external observer receiving photons which terminate in the past at the naked singularity formed in a Tolman-Bondi dust collapse. Within the context of models considered here it is shown that photons emitted from a weak curvature naked singularity are always finite... |
1208.5399 | Christopher J. Fewster | Christopher J. Fewster | Lectures on quantum energy inequalities | 50pp, Lectures given at the Albert Einstein Institute, Golm | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum field theory violates all the classical energy conditions of general
relativity. Nonetheless, it turns out that quantum field theories satisfy
remnants of the classical energy conditions, known as Quantum Energy
Inequalities (QEIs), that have been developed by various authors since the
original pioneering wor... | [
{
"created": "Mon, 27 Aug 2012 13:53:07 GMT",
"version": "v1"
}
] | 2012-08-28 | [
[
"Fewster",
"Christopher J.",
""
]
] | Quantum field theory violates all the classical energy conditions of general relativity. Nonetheless, it turns out that quantum field theories satisfy remnants of the classical energy conditions, known as Quantum Energy Inequalities (QEIs), that have been developed by various authors since the original pioneering work ... |
1306.3231 | Michel Buck | Siavash Aslanbeigi, Michel Buck | A preferred ground state for the scalar field in de Sitter space | 35 pages, 9 figures | null | 10.1007/JHEP08(2013)039 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a recent proposal for a distinguished vacuum state of a free
scalar quantum field in an arbitrarily curved spacetime, known as the
Sorkin-Johnston (SJ) vacuum, by applying it to de Sitter space. We derive the
associated two-point functions on both the global and Poincar\'e (cosmological)
patches in gen... | [
{
"created": "Thu, 13 Jun 2013 20:00:06 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Aslanbeigi",
"Siavash",
""
],
[
"Buck",
"Michel",
""
]
] | We investigate a recent proposal for a distinguished vacuum state of a free scalar quantum field in an arbitrarily curved spacetime, known as the Sorkin-Johnston (SJ) vacuum, by applying it to de Sitter space. We derive the associated two-point functions on both the global and Poincar\'e (cosmological) patches in gener... |
gr-qc/0412021 | Mamdouh Wanas | M.I.Wanas | Quantum Properties of a General Path Deviation Equation in the
Pap-Geometry | LaTex File, 8 pages | null | null | null | gr-qc | null | A path deviation equation in the Parameterized Absolute Parallelism (PAP)
geometry is derived. This equation includes curvature and torsion terms. These
terms are found to be naturally quantized. The equation represents the
deviation from a general path equation, in the PAP-geometry, derived by the
author in a previo... | [
{
"created": "Sat, 4 Dec 2004 10:34:38 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wanas",
"M. I.",
""
]
] | A path deviation equation in the Parameterized Absolute Parallelism (PAP) geometry is derived. This equation includes curvature and torsion terms. These terms are found to be naturally quantized. The equation represents the deviation from a general path equation, in the PAP-geometry, derived by the author in a previous... |
1204.0794 | Barry Wardell | Anna Heffernan, Adrian Ottewill, Barry Wardell | High-order expansions of the Detweiler-Whiting singular field in
Schwarzschild spacetime | 38 pages, typos fixed, final published version | Phys. Rev. D 82, 104023 (2012) | 10.1103/PhysRevD.86.104023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The self field of a charged particle has a component that diverges at the
particle. We use both coordinate and covariant approaches to compute an
expansion of this singular field for generic geodesic orbits in Schwarzschild
spacetime for scalar, electromagnetic and graviational cases. We check
agreement of both appro... | [
{
"created": "Tue, 3 Apr 2012 20:02:24 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jun 2012 19:25:28 GMT",
"version": "v2"
},
{
"created": "Sun, 1 Jul 2012 10:52:12 GMT",
"version": "v3"
},
{
"created": "Tue, 5 Nov 2013 16:02:40 GMT",
"version": "v4"
}
] | 2013-11-06 | [
[
"Heffernan",
"Anna",
""
],
[
"Ottewill",
"Adrian",
""
],
[
"Wardell",
"Barry",
""
]
] | The self field of a charged particle has a component that diverges at the particle. We use both coordinate and covariant approaches to compute an expansion of this singular field for generic geodesic orbits in Schwarzschild spacetime for scalar, electromagnetic and graviational cases. We check agreement of both approac... |
1706.03209 | Soumya Jana | Soumya Jana, Sayan Kar (IIT Kharagpur, India) | Born-Infeld gravity with a Brans-Dicke scalar | 25 pages, 7 figures. Published version | Phys. Rev. D 96, 024050 (2017) | 10.1103/PhysRevD.96.024050 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently proposed Born-Infeld (BI) theories of gravity assume a constant BI
parameter ($\kappa$). However, no clear consensus exists on the sign and value
of $\kappa$. Recalling the Brans-Dicke (BD) approach, where a scalar field was
used to generate the gravitational constant $G$, we suggest an extension of
Born-Inf... | [
{
"created": "Sat, 10 Jun 2017 09:32:24 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Jul 2017 14:18:07 GMT",
"version": "v2"
}
] | 2017-07-28 | [
[
"Jana",
"Soumya",
"",
"IIT Kharagpur, India"
],
[
"Kar",
"Sayan",
"",
"IIT Kharagpur, India"
]
] | Recently proposed Born-Infeld (BI) theories of gravity assume a constant BI parameter ($\kappa$). However, no clear consensus exists on the sign and value of $\kappa$. Recalling the Brans-Dicke (BD) approach, where a scalar field was used to generate the gravitational constant $G$, we suggest an extension of Born-Infel... |
1105.6197 | Jose Natario | Jose Natario | Optimal time travel in the Godel universe | 16 pages, 2 figures; v2: lower bound in the velocity and reference
added | Gen. Rel. Grav. 44 (2012) 855-874 | 10.1007/s10714-011-1308-1 | null | gr-qc math.OC | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the theory of optimal rocket trajectories in general relativity,
recently developed in arXiv:1105.5235, we present a candidate for the minimum
total integrated acceleration closed timelike curve in the Godel universe, and
give evidence for its minimality. The total integrated acceleration of this
curve is lower... | [
{
"created": "Tue, 31 May 2011 08:11:24 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Oct 2011 13:45:18 GMT",
"version": "v2"
}
] | 2015-05-28 | [
[
"Natario",
"Jose",
""
]
] | Using the theory of optimal rocket trajectories in general relativity, recently developed in arXiv:1105.5235, we present a candidate for the minimum total integrated acceleration closed timelike curve in the Godel universe, and give evidence for its minimality. The total integrated acceleration of this curve is lower t... |
2303.14945 | Octavian Micu | Roberto Casadio and Octavian Micu | Quantum matter core of black holes (and quantum hair) | Invited chapter for the edited book New Frontiers in Gravitational
Collapse and Spacetime Singularities (Eds. P. Joshi and D. Malafarina,
Springer Singapore, expected in 2023) | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The idea that gravity can act as a regulator of ultraviolet divergences is
almost a century old and has inspired several approaches to quantum gravity. In
fact, a minimum Planckian length can be shown to emerge from the nonlinear
dynamics of gravity in the effective field theory approach to gravitational
scatterings ... | [
{
"created": "Mon, 27 Mar 2023 07:06:36 GMT",
"version": "v1"
}
] | 2023-03-28 | [
[
"Casadio",
"Roberto",
""
],
[
"Micu",
"Octavian",
""
]
] | The idea that gravity can act as a regulator of ultraviolet divergences is almost a century old and has inspired several approaches to quantum gravity. In fact, a minimum Planckian length can be shown to emerge from the nonlinear dynamics of gravity in the effective field theory approach to gravitational scatterings at... |
2304.12733 | Spiros Cotsakis | Spiros Cotsakis, Jose P. Mimoso, John Miritzis | The cosmological frame principle and cosmic acceleration | v2: 12 pages, 3 figures, some more discussion and references added,
matches published version | Eur. Phys. J. C 83, 735 (2023) | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss implications of the cosmological frame principle which states that
cosmological effects of modified gravity must be stable as solutions of each of
the corresponding sets of dynamical equations holding in the two
conformally-related frames. We show that there are such globally stable,
`frame-independent' so... | [
{
"created": "Tue, 25 Apr 2023 11:25:01 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Aug 2023 16:58:48 GMT",
"version": "v2"
}
] | 2023-08-23 | [
[
"Cotsakis",
"Spiros",
""
],
[
"Mimoso",
"Jose P.",
""
],
[
"Miritzis",
"John",
""
]
] | We discuss implications of the cosmological frame principle which states that cosmological effects of modified gravity must be stable as solutions of each of the corresponding sets of dynamical equations holding in the two conformally-related frames. We show that there are such globally stable, `frame-independent' solu... |
1510.04784 | Prasobh C.B | Prasobh C.B., Jishnu Suresh, V.C. Kuriakose | Thermodynamics of Charged Lovelock - AdS Black Holes | 17 pages, 13 figures. arXiv admin note: text overlap with
arXiv:1312.0679 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the thermodynamic behavior of maximally symmetric charged,
asymptotically AdS black hole solutions of Lovelock gravity. We explore the
thermodynamic stability of such solutions by the ordinary method of calculating
the specific heat of the black holes and investigating its divergences which
signal seco... | [
{
"created": "Fri, 16 Oct 2015 05:40:15 GMT",
"version": "v1"
}
] | 2015-10-19 | [
[
"B.",
"Prasobh C.",
""
],
[
"Suresh",
"Jishnu",
""
],
[
"Kuriakose",
"V. C.",
""
]
] | We investigate the thermodynamic behavior of maximally symmetric charged, asymptotically AdS black hole solutions of Lovelock gravity. We explore the thermodynamic stability of such solutions by the ordinary method of calculating the specific heat of the black holes and investigating its divergences which signal second... |
1807.10729 | Diego S\'aez-Chill\'on G\'omez | Norman Cruz, Esteban Gonzalez, Samuel Lepe and Diego Saez-Chillon
Gomez | Analysing dissipative effects in the $\Lambda$CDM model | 11 pages, 4 figures, analysis extended | JCAP 12 (2018) 017 | 10.1088/1475-7516/2018/12/017 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper, the effects of viscous dark matter are analysed within
the $\Lambda$CDM model. Here we consider bulk viscosity through the
Israel-Stewart theory approach, leading to an effective pressure term in the
continuity equation that accomplishes for the dissipative effects of the dark
matter fluid. Then... | [
{
"created": "Fri, 27 Jul 2018 16:56:26 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Oct 2018 12:14:35 GMT",
"version": "v2"
}
] | 2018-12-13 | [
[
"Cruz",
"Norman",
""
],
[
"Gonzalez",
"Esteban",
""
],
[
"Lepe",
"Samuel",
""
],
[
"Gomez",
"Diego Saez-Chillon",
""
]
] | In the present paper, the effects of viscous dark matter are analysed within the $\Lambda$CDM model. Here we consider bulk viscosity through the Israel-Stewart theory approach, leading to an effective pressure term in the continuity equation that accomplishes for the dissipative effects of the dark matter fluid. Then, ... |
1507.07100 | Tim Dietrich | Tim Dietrich, Niclas Moldenhauer, Nathan K. Johnson-McDaniel,
Sebastiano Bernuzzi, Charalampos M. Markakis, Bernd Bruegmann, Wolfgang Tichy | Binary Neutron Stars with Generic Spin, Eccentricity, Mass ratio, and
Compactness - Quasi-equilibrium Sequences and First Evolutions | (37pages, 26 figures) | Phys. Rev. D 92, 124007 (2015) | 10.1103/PhysRevD.92.124007 | ICTS/2015/5 | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Information about the last stages of a binary neutron star inspiral and the
final merger can be extracted from quasi-equilibrium configurations and
dynamical evolutions. In this article, we construct quasi-equilibrium
configurations for different spins, eccentricities, mass ratios, compactnesses,
and equations of sta... | [
{
"created": "Sat, 25 Jul 2015 13:24:10 GMT",
"version": "v1"
}
] | 2015-12-09 | [
[
"Dietrich",
"Tim",
""
],
[
"Moldenhauer",
"Niclas",
""
],
[
"Johnson-McDaniel",
"Nathan K.",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Markakis",
"Charalampos M.",
""
],
[
"Bruegmann",
"Bernd",
""
],
[
"Tichy",
... | Information about the last stages of a binary neutron star inspiral and the final merger can be extracted from quasi-equilibrium configurations and dynamical evolutions. In this article, we construct quasi-equilibrium configurations for different spins, eccentricities, mass ratios, compactnesses, and equations of state... |
1901.02202 | Gen Ye | Gen Ye, Yun-Song Piao | Implication of GW170817 for cosmological bounces | 17 pages, 4 figures; refs added, typos fixed | Commun. Theor. Phys. 71 no.4 (2019), 427 | 10.1088/0253-6102/71/4/427 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of GW170817 and its electromagnetic counterpart has revealed
the speed of gravitational waves coincides with the speed of light, $c_T=1$.
Inspired by the possibility that the physics implied by GW170817 might be
related with that for the primordial universe, we construct the spatially flat
stable (throu... | [
{
"created": "Tue, 8 Jan 2019 08:24:08 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Mar 2019 09:37:24 GMT",
"version": "v2"
}
] | 2019-05-22 | [
[
"Ye",
"Gen",
""
],
[
"Piao",
"Yun-Song",
""
]
] | The detection of GW170817 and its electromagnetic counterpart has revealed the speed of gravitational waves coincides with the speed of light, $c_T=1$. Inspired by the possibility that the physics implied by GW170817 might be related with that for the primordial universe, we construct the spatially flat stable (through... |
2106.10644 | Tiberiu Harko | Zahra Haghani, Tiberiu Harko | Generalizing the coupling between geometry and matter: $f(R,L_m,T)$
gravity | 21 pages, 3 figures, accepted for publication in EPJC; references
added | null | 10.1140/epjc/s10052-021-09359-3 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize and unify the $f(R,T)$ and $f(R,L_m)$ type gravity models by
assuming that the gravitational Lagrangian is given by an arbitrary function of
the Ricci scalar $R$, of the trace of the energy-momentum tensor $T$, and of
the matter Lagrangian $L_m$, so that $L_{grav}=f(R,L_m,T)$. We obtain the
gravitationa... | [
{
"created": "Sun, 20 Jun 2021 07:41:30 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Jun 2021 09:58:23 GMT",
"version": "v2"
}
] | 2021-07-28 | [
[
"Haghani",
"Zahra",
""
],
[
"Harko",
"Tiberiu",
""
]
] | We generalize and unify the $f(R,T)$ and $f(R,L_m)$ type gravity models by assuming that the gravitational Lagrangian is given by an arbitrary function of the Ricci scalar $R$, of the trace of the energy-momentum tensor $T$, and of the matter Lagrangian $L_m$, so that $L_{grav}=f(R,L_m,T)$. We obtain the gravitational ... |
1410.7296 | Xuefei Gong | Xuefei Gong, Yun-Kau Lau, Shengnian Xu, Pau Amaro-Seoane, Shan Bai,
Xing Bian, Zhoujian Cao, Gerui Chen, Xian Chen, Yanwei Ding, Peng Dong, Wei
Gao, Gerhard Heinzel, Ming Li, Shuo Li, Fukun Liu, Ziren Luo, Mingxue Shao,
Rainer Spurzem, Baosan Sun, Wenlin Tang, Yan Wang, Peng Xu, Pin Yu, Yefei
Yuan, Xiaomin Zhan... | Descope of the ALIA mission | null | null | 10.1088/1742-6596/610/1/012011 | null | gr-qc astro-ph.CO astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present work reports on a feasibility study commissioned by the Chinese
Academy of Sciences of China to explore various possible mission options to
detect gravitational waves in space alternative to that of the eLISA/LISA
mission concept. Based on the relative merits assigned to science and
technological viabilit... | [
{
"created": "Wed, 22 Oct 2014 08:48:08 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Nov 2014 14:41:08 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Gong",
"Xuefei",
""
],
[
"Lau",
"Yun-Kau",
""
],
[
"Xu",
"Shengnian",
""
],
[
"Amaro-Seoane",
"Pau",
""
],
[
"Bai",
"Shan",
""
],
[
"Bian",
"Xing",
""
],
[
"Cao",
"Zhoujian",
""
],
[
"Chen",
"G... | The present work reports on a feasibility study commissioned by the Chinese Academy of Sciences of China to explore various possible mission options to detect gravitational waves in space alternative to that of the eLISA/LISA mission concept. Based on the relative merits assigned to science and technological viability,... |
1302.5079 | Masoud Allahverdizadeh | Masoud Allahverdizadeh, Jose P. S. Lemos and Ahmad Sheykhi | Extremal Myers-Perry black holes coupled to Born-Infeld electrodynamics
in five dimensions | null | Phys. Rev. D 87, 084002 (2013) | 10.1103/PhysRevD.87.084002 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/3.0/ | We construct a new class of perturbative extremal charged rotating black hole
solutions in five dimensions in the Einstein--Born-Infeld theory. We start with
an extremal five-dimensional Myers-Perry black hole seed in which the two
possible angular momenta have equal magnitude, and add Born-Infeld electrical
charge k... | [
{
"created": "Tue, 19 Feb 2013 15:06:46 GMT",
"version": "v1"
}
] | 2014-08-18 | [
[
"Allahverdizadeh",
"Masoud",
""
],
[
"Lemos",
"Jose P. S.",
""
],
[
"Sheykhi",
"Ahmad",
""
]
] | We construct a new class of perturbative extremal charged rotating black hole solutions in five dimensions in the Einstein--Born-Infeld theory. We start with an extremal five-dimensional Myers-Perry black hole seed in which the two possible angular momenta have equal magnitude, and add Born-Infeld electrical charge kee... |
1705.08585 | Jennie D'Ambroise | Jennie D'Ambroise, Floyd L. Williams | Elliptic function solutions in Jackiw-Teitelboim dilaton gravity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new family of solutions for the Jackiw-Teitelboim model of
two-dimensional gravity with a negative cosmological constant. Here, a metric
of constant Ricci scalar curvature is constructed, and explicit linearly
independent solutions of the corresponding dilaton field equations are
determined. The metric i... | [
{
"created": "Wed, 24 May 2017 02:30:23 GMT",
"version": "v1"
}
] | 2017-05-25 | [
[
"D'Ambroise",
"Jennie",
""
],
[
"Williams",
"Floyd L.",
""
]
] | We present a new family of solutions for the Jackiw-Teitelboim model of two-dimensional gravity with a negative cosmological constant. Here, a metric of constant Ricci scalar curvature is constructed, and explicit linearly independent solutions of the corresponding dilaton field equations are determined. The metric is ... |
2112.10530 | Ezgi Canay | Maxim Eingorn, Andrew McLaughlin II, Ezgi Canay, Maksym Brilenkov,
Alexander Zhuk | Gravitational Interaction in the Chimney Lattice Universe | null | Universe 7, 101 (2021) | 10.3390/universe7040101 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We investigate the influence of the chimney topology $T\times T\times R$ of
the Universe on the gravitational potential and force that are generated by
point-like massive bodies. We obtain three distinct expressions for the
solutions. One follows from Fourier expansion of delta functions into series
using periodicity... | [
{
"created": "Mon, 20 Dec 2021 13:47:04 GMT",
"version": "v1"
}
] | 2021-12-21 | [
[
"Eingorn",
"Maxim",
""
],
[
"McLaughlin",
"Andrew",
"II"
],
[
"Canay",
"Ezgi",
""
],
[
"Brilenkov",
"Maksym",
""
],
[
"Zhuk",
"Alexander",
""
]
] | We investigate the influence of the chimney topology $T\times T\times R$ of the Universe on the gravitational potential and force that are generated by point-like massive bodies. We obtain three distinct expressions for the solutions. One follows from Fourier expansion of delta functions into series using periodicity i... |
1107.2882 | Miguel Oliveira | Miguel A. Oliveira | Velocity measurements in General Relativity revisited | 15 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we generalize an earlier treatment of the measurements of
velocities at the event horizon of a black hole. This is intended as a
pedagogical exercise as well as one more contribution to the resolution of some
unphysical interpretations related to velocity measurements by generalized
observers. We now use... | [
{
"created": "Thu, 14 Jul 2011 18:16:52 GMT",
"version": "v1"
}
] | 2011-07-15 | [
[
"Oliveira",
"Miguel A.",
""
]
] | In this work we generalize an earlier treatment of the measurements of velocities at the event horizon of a black hole. This is intended as a pedagogical exercise as well as one more contribution to the resolution of some unphysical interpretations related to velocity measurements by generalized observers. We now use a... |
gr-qc/0611078 | Christophe Le Poncin-Lafitte | Pierre Teyssandier (1), Christophe Le Poncin-Lafitte (2) ((1) SYRTE
Observatoire de Paris, (2) Lohrmann Observatory, Dresden Technical
University) | Angular distances in metric theories | 11 pages, no figure. Submitted to Physical Review D | null | null | null | gr-qc | null | The general expression of the angular distance between two point sources as
measured by an arbitrary observer is given. The modelling presented here is
rigorous, covariant and valid in any space-time. The sources of light may be
located at a finite distance from the observer. The aberration and the
gravitational defl... | [
{
"created": "Tue, 14 Nov 2006 18:31:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Teyssandier",
"Pierre",
""
],
[
"Poncin-Lafitte",
"Christophe Le",
""
]
] | The general expression of the angular distance between two point sources as measured by an arbitrary observer is given. The modelling presented here is rigorous, covariant and valid in any space-time. The sources of light may be located at a finite distance from the observer. The aberration and the gravitational deflec... |
2306.02023 | Majid Mohsenzadeh Ganji | Majid Mohsenzadeh | Quasi-de Sitter Solution, Negative Norm State and Krein Space in
Cosmology | 12 Pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent observational data have shown two important results about cosmic
inflation: First, the primordial power spectrum is approximately scale
invariant. Secondly, the space-time geometry during inflation is quasi-de
Sitter. In this paper, we study the background field method and the concept of
negative norm states i... | [
{
"created": "Sat, 3 Jun 2023 06:48:18 GMT",
"version": "v1"
}
] | 2023-06-06 | [
[
"Mohsenzadeh",
"Majid",
""
]
] | Recent observational data have shown two important results about cosmic inflation: First, the primordial power spectrum is approximately scale invariant. Secondly, the space-time geometry during inflation is quasi-de Sitter. In this paper, we study the background field method and the concept of negative norm states in ... |
2103.15549 | Abbas Sherif | Abbas M. Sherif, Peter K. S. Dunsby, Rituparno Goswami and Sunil D.
Maharaj | On homothetic Killing vectors in stationary axisymmetric vacuum
spacetimes | 24 pages | null | 10.1142/S0219887821501218 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper we consider homothetic Killing vectors in the class of
stationary axisymmetric vacuum (SAV) spacetimes, where the components of the
vectors are functions of the time and radial coordinates. In this case the
component of any homothetic Killing vector along the $z$ direction must be
constant. Firstly, it ... | [
{
"created": "Mon, 29 Mar 2021 12:25:29 GMT",
"version": "v1"
},
{
"created": "Thu, 6 May 2021 18:30:03 GMT",
"version": "v2"
}
] | 2021-05-10 | [
[
"Sherif",
"Abbas M.",
""
],
[
"Dunsby",
"Peter K. S.",
""
],
[
"Goswami",
"Rituparno",
""
],
[
"Maharaj",
"Sunil D.",
""
]
] | In this paper we consider homothetic Killing vectors in the class of stationary axisymmetric vacuum (SAV) spacetimes, where the components of the vectors are functions of the time and radial coordinates. In this case the component of any homothetic Killing vector along the $z$ direction must be constant. Firstly, it is... |
2008.10130 | Maciek Wielgus | Maciek Wielgus, Jiri Horak, Frederic Vincent, Marek Abramowicz | Reflection-asymmetric wormholes and their double shadows | 9 pages, accepted in Phys. Rev. D | Phys. Rev. D 102, 084044 (2020) | 10.1103/PhysRevD.102.084044 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss construction and observational properties of wormholes obtained by
connecting two Reissner-Nordstrom spacetimes with distinct mass and charge
parameters. These objects are spherically symmetric, but not
reflection-symmetric, as the connected spacetimes differ. The
reflection-asymmetric wormholes may reflec... | [
{
"created": "Sun, 23 Aug 2020 23:19:25 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Sep 2020 22:09:52 GMT",
"version": "v2"
}
] | 2020-10-28 | [
[
"Wielgus",
"Maciek",
""
],
[
"Horak",
"Jiri",
""
],
[
"Vincent",
"Frederic",
""
],
[
"Abramowicz",
"Marek",
""
]
] | We discuss construction and observational properties of wormholes obtained by connecting two Reissner-Nordstrom spacetimes with distinct mass and charge parameters. These objects are spherically symmetric, but not reflection-symmetric, as the connected spacetimes differ. The reflection-asymmetric wormholes may reflect ... |
2302.14553 | Marcelo Schiffer | Marcelo Schiffer | Angular Momentum Fluctuations | 6 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider angular momentum fluctuations of a Schwartzschild
black hole in thermal equilibrium with radiation which, for the sake of
simplicity is here modeled by a scalar field. Important, we do not set the
black hole angular momentum $J$ identically to zero at the outset; we allow it
to have a small... | [
{
"created": "Tue, 28 Feb 2023 13:18:36 GMT",
"version": "v1"
}
] | 2023-03-01 | [
[
"Schiffer",
"Marcelo",
""
]
] | In this paper, we consider angular momentum fluctuations of a Schwartzschild black hole in thermal equilibrium with radiation which, for the sake of simplicity is here modeled by a scalar field. Important, we do not set the black hole angular momentum $J$ identically to zero at the outset; we allow it to have a small v... |
gr-qc/9507020 | Philip Carinhas | Philip A. Carinhas | Cauchy Problem for Gott Spacetime | 44 pages, 7 postscript figures. Latex version uses revtex.sty and
aps.sty. Complete downloadable postscript version with embeded figures
available from http://vlbi.matapl.uv.es/~carinhas/resume.html or
http://www.ph.utexas.edu/~carinhas/resume.html | null | null | WISC-MIL-94-TH-17 | gr-qc | null | Gott recently has constructed a spacetime modeled by two infinitely long,
parallel cosmic strings which pass and gravitationally interact with each
other. For large enough velocity, the spacetime will contain closed timelike
curves. An explicit construction of the solution for a scalar field is
presented in detail an... | [
{
"created": "Mon, 10 Jul 1995 19:33:56 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Carinhas",
"Philip A.",
""
]
] | Gott recently has constructed a spacetime modeled by two infinitely long, parallel cosmic strings which pass and gravitationally interact with each other. For large enough velocity, the spacetime will contain closed timelike curves. An explicit construction of the solution for a scalar field is presented in detail and ... |
2302.03710 | Molly Burkmar | Molly Burkmar and Marco Bruni | Bouncing cosmology from nonlinear dark energy with two cosmological
constants | 26 pages, 21 figures. Updated version to reflect changes made for
publication | null | 10.1103/PhysRevD.107.083533 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We explore the dynamics of FLRW cosmologies which consist of dark matter,
radiation and dark energy with a quadratic equation of state. Standard
cosmological singularities arise due to energy conditions which are violated by
dark energy, therefore we focus our analysis on non-singular bouncing and
cyclic cosmologies,... | [
{
"created": "Tue, 7 Feb 2023 19:01:00 GMT",
"version": "v1"
},
{
"created": "Thu, 18 May 2023 10:31:43 GMT",
"version": "v2"
}
] | 2023-05-19 | [
[
"Burkmar",
"Molly",
""
],
[
"Bruni",
"Marco",
""
]
] | We explore the dynamics of FLRW cosmologies which consist of dark matter, radiation and dark energy with a quadratic equation of state. Standard cosmological singularities arise due to energy conditions which are violated by dark energy, therefore we focus our analysis on non-singular bouncing and cyclic cosmologies, i... |
2303.17640 | Ulrich Beckering Vinckers | Ulrich K. Beckering Vinckers, \'Alvaro de la Cruz-Dombriz and Anupam
Mazumdar | Quantum entanglement of masses with non-local gravitational interaction | 12 pages, 3 figures, version published in PRD | Phys. Rev. D 107, 124036 (2023) | 10.1103/PhysRevD.107.124036 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the quantum gravitational entanglement of two test masses in the
context of linearized General Relativity with specific non-local interaction
with matter. To accomplish this, we consider an energy-momentum tensor
describing two test particles of equal mass with each possessing some non-zero
momentum. After... | [
{
"created": "Thu, 30 Mar 2023 18:14:28 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Jun 2023 15:16:13 GMT",
"version": "v2"
}
] | 2023-06-19 | [
[
"Vinckers",
"Ulrich K. Beckering",
""
],
[
"de la Cruz-Dombriz",
"Álvaro",
""
],
[
"Mazumdar",
"Anupam",
""
]
] | We examine the quantum gravitational entanglement of two test masses in the context of linearized General Relativity with specific non-local interaction with matter. To accomplish this, we consider an energy-momentum tensor describing two test particles of equal mass with each possessing some non-zero momentum. After d... |
2312.15666 | Xinliang An | Xinliang An, Taoran He | Dynamics of Apparent Horizon and a Null Comparison Principle | 42 pages | null | null | null | gr-qc math-ph math.AP math.DG math.MP | http://creativecommons.org/licenses/by/4.0/ | This paper investigates the global dynamics of the apparent horizon. We
present an approach to establish its existence and its long-term behaviors. Our
apparent horizon is constructed by solving the marginally outer trapped surface
(MOTS) along each incoming null hypersurface. Based on the nonlinear hyperbolic
estima... | [
{
"created": "Mon, 25 Dec 2023 09:22:58 GMT",
"version": "v1"
}
] | 2023-12-27 | [
[
"An",
"Xinliang",
""
],
[
"He",
"Taoran",
""
]
] | This paper investigates the global dynamics of the apparent horizon. We present an approach to establish its existence and its long-term behaviors. Our apparent horizon is constructed by solving the marginally outer trapped surface (MOTS) along each incoming null hypersurface. Based on the nonlinear hyperbolic estimate... |
gr-qc/0405072 | T. Padmanabhan | T. Padmanabhan | Entropy of Horizons, Complex Paths and Quantum Tunneling | published version | Mod.Phys.Lett. A19 (2004) 2637-2643 | 10.1142/S0217732304015257 | null | gr-qc astro-ph hep-th | null | In any spacetime, it is possible to have a family of observers following a
congruence of timelike curves such that they do not have access to part of the
spacetime. This lack of information suggests associating a (congruence
dependent) notion of entropy with the horizon that blocks the information from
these observer... | [
{
"created": "Fri, 14 May 2004 05:56:37 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jan 2005 13:56:42 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Padmanabhan",
"T.",
""
]
] | In any spacetime, it is possible to have a family of observers following a congruence of timelike curves such that they do not have access to part of the spacetime. This lack of information suggests associating a (congruence dependent) notion of entropy with the horizon that blocks the information from these observers.... |
gr-qc/9512008 | Kenneth Dalton | Kenneth Dalton | Einstein's Energy-Free Gravitational Field | 5 pages, LaTeX. Note: Divergence formula (13) is clarified | null | null | null | gr-qc | null | We show that Einstein's gravitational field has zero energy, momentum, and
stress. This conclusion follows directly from the gravitational field
equations, in conjunction with the differential law of energy-momentum
conservation $ T^{\mu\nu}_{;\nu} = 0 $. Einstein rejected this conservation law
despite the fact that ... | [
{
"created": "Mon, 4 Dec 1995 15:14:00 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Mar 1997 18:17:03 GMT",
"version": "v2"
},
{
"created": "Fri, 13 Mar 1998 21:29:34 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Dalton",
"Kenneth",
""
]
] | We show that Einstein's gravitational field has zero energy, momentum, and stress. This conclusion follows directly from the gravitational field equations, in conjunction with the differential law of energy-momentum conservation $ T^{\mu\nu}_{;\nu} = 0 $. Einstein rejected this conservation law despite the fact that it... |
gr-qc/9905055 | Kleidis Kostas | K. Kleidis and N. K. Spyrou | Geodesic motions versus hydrodynamic flows in a gravitating perfect
fluid: Dynamical equivalence and consequences | LaTeX file, 22 pages | Class.Quant.Grav. 17 (2000) 2965-2982 | 10.1088/0264-9381/17/15/308 | null | gr-qc | null | Stimulated by the methods applied for the observational determination of
masses in the central regions of the AGNs, we examine the conditions under
which, in the interior of a gravitating perfect fluid source, the geodesic
motions and the general relativistic hydrodynamic flows are dynamically
equivalent to each othe... | [
{
"created": "Mon, 17 May 1999 08:20:50 GMT",
"version": "v1"
},
{
"created": "Tue, 18 May 1999 09:25:51 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Kleidis",
"K.",
""
],
[
"Spyrou",
"N. K.",
""
]
] | Stimulated by the methods applied for the observational determination of masses in the central regions of the AGNs, we examine the conditions under which, in the interior of a gravitating perfect fluid source, the geodesic motions and the general relativistic hydrodynamic flows are dynamically equivalent to each other.... |
1804.04753 | Peter Zimmerman | Samuel E. Gralla and Peter Zimmerman | Scaling and Universality in Extremal Black Hole Perturbations | 31 pages. v3 matches published version | null | 10.1007/JHEP06(2018)061 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the emergent near-horizon conformal symmetry of extremal black
holes gives rise to universal behavior in perturbing fields, both near and far
from the black hole horizon. The scale-invariance of the near-horizon region
entails power law time-dependence with three universal features: (1) the decay
off the... | [
{
"created": "Fri, 13 Apr 2018 00:32:20 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Apr 2018 23:56:14 GMT",
"version": "v2"
},
{
"created": "Wed, 11 Jul 2018 15:52:47 GMT",
"version": "v3"
}
] | 2018-07-12 | [
[
"Gralla",
"Samuel E.",
""
],
[
"Zimmerman",
"Peter",
""
]
] | We show that the emergent near-horizon conformal symmetry of extremal black holes gives rise to universal behavior in perturbing fields, both near and far from the black hole horizon. The scale-invariance of the near-horizon region entails power law time-dependence with three universal features: (1) the decay off the h... |
gr-qc/0509041 | Stephen Fairhurst | F.Beauville, M.-A.Bizouard, L.Blackburn, L.Bosi, P.Brady, L.Brocco,
D.Brown, D.Buskulic, F.Cavalier, S.Chatterji, N.Christensen, A.-C.Clapson,
S.Fairhurst, D.Grosjean, G.Guidi, P.Hello, E.Katsavounidis, M.Knight,
A.Lazzarini, N.Leroy, F.Marion, B.Mours, F.Ricci, A.Vicere, M.Zanolin | Benefits of joint LIGO -- Virgo coincidence searches for burst and
inspiral signals | 11 pages 8 figures, Amaldi 6 proceedings | J.Phys.Conf.Ser. 32 (2006) 212 | 10.1088/1742-6596/32/1/032 | null | gr-qc | null | We examine the benefits of performing a joint LIGO--Virgo search for
transient signals. We do this by adding burst and inspiral signals to 24 hours
of simulated detector data. We find significant advantages to performing a
joint coincidence analysis, above either a LIGO only or Virgo only search.
These include an inc... | [
{
"created": "Mon, 12 Sep 2005 18:18:58 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Beauville",
"F.",
""
],
[
"Bizouard",
"M. -A.",
""
],
[
"Blackburn",
"L.",
""
],
[
"Bosi",
"L.",
""
],
[
"Brady",
"P.",
""
],
[
"Brocco",
"L.",
""
],
[
"Brown",
"D.",
""
],
[
"Buskulic",
"D.",
... | We examine the benefits of performing a joint LIGO--Virgo search for transient signals. We do this by adding burst and inspiral signals to 24 hours of simulated detector data. We find significant advantages to performing a joint coincidence analysis, above either a LIGO only or Virgo only search. These include an incre... |
2002.02119 | Todd Oliynyk | David Fajman, Todd A. Oliynyk and Zoe Wyatt | Stabilizing relativistic fluids on spacetimes with non-accelerated
expansion | null | Commun. Math. Phys. 383, 401-426 (2021) | 10.1007/s00220-020-03924-9 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish global regularity and stability for the irrotational
relativistic Euler equations with equation of state
$\overline{p}=K\overline{\rho}$, where $0<K<1/3$, for small initial data in the
expanding direction of FLRW spacetimes of the form $(\mathbb R\times\mathbb
T^3,-d\tb^2+\tb^2\delta_{ij} dx^i dx^j)$. Th... | [
{
"created": "Thu, 6 Feb 2020 06:40:06 GMT",
"version": "v1"
}
] | 2021-03-30 | [
[
"Fajman",
"David",
""
],
[
"Oliynyk",
"Todd A.",
""
],
[
"Wyatt",
"Zoe",
""
]
] | We establish global regularity and stability for the irrotational relativistic Euler equations with equation of state $\overline{p}=K\overline{\rho}$, where $0<K<1/3$, for small initial data in the expanding direction of FLRW spacetimes of the form $(\mathbb R\times\mathbb T^3,-d\tb^2+\tb^2\delta_{ij} dx^i dx^j)$. This... |
2208.08877 | Mouhssine Koussour | M. Koussour, K. El Bourakadi, S. H. Shekh, S. K. J. Pacif and M.
Bennai | Late-time acceleration in $f\left( Q\right) $ gravity: Analysis and
constraints in an anisotropic background | Annals of Physics accepted version | null | 10.1016/j.aop.2022.169092 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to investigate the anisotropic locally rotationally
symmetric (LRS) Bianchi type-I space-time in the context of the recently
proposed $f(Q)$ gravity in which $Q$ is the non-metricity scalar. For this
purpose, we consider a linear form of $f\left( Q\right) $ gravity model,
specifically, $f\left( ... | [
{
"created": "Tue, 16 Aug 2022 19:17:00 GMT",
"version": "v1"
}
] | 2022-08-26 | [
[
"Koussour",
"M.",
""
],
[
"Bourakadi",
"K. El",
""
],
[
"Shekh",
"S. H.",
""
],
[
"Pacif",
"S. K. J.",
""
],
[
"Bennai",
"M.",
""
]
] | This paper is devoted to investigate the anisotropic locally rotationally symmetric (LRS) Bianchi type-I space-time in the context of the recently proposed $f(Q)$ gravity in which $Q$ is the non-metricity scalar. For this purpose, we consider a linear form of $f\left( Q\right) $ gravity model, specifically, $f\left( Q\... |
1912.08295 | Kayll Lake | Kayll Lake | Spacetimes with a vanishing second Ricci invariant | 3 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spacetimes with a vanishing second Ricci invariant, but which are not
necessarily Ricci - flat, though common in general relativity, are seldom
studied in a coordinate and symmetry independent way by actually using their
Ricci invariants. Yet, and as an example, it can be shown by use of Ricci
invariants that no such... | [
{
"created": "Tue, 17 Dec 2019 22:30:42 GMT",
"version": "v1"
}
] | 2019-12-19 | [
[
"Lake",
"Kayll",
""
]
] | Spacetimes with a vanishing second Ricci invariant, but which are not necessarily Ricci - flat, though common in general relativity, are seldom studied in a coordinate and symmetry independent way by actually using their Ricci invariants. Yet, and as an example, it can be shown by use of Ricci invariants that no such s... |
gr-qc/0508052 | Richard Price | Richard H. Price and Joseph D. Romano | In an expanding universe, what doesn't expand? | 8 pages, 9 eps figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The expansion of the universe is often viewed as a uniform stretching of
space that would affect compact objects, atoms and stars, as well as the
separation of galaxies. One usually hears that bound systems do not take part
in the general expansion, but a much more subtle question is whether bound
systems expand part... | [
{
"created": "Fri, 12 Aug 2005 14:46:30 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Jan 2012 14:37:47 GMT",
"version": "v2"
}
] | 2012-01-10 | [
[
"Price",
"Richard H.",
""
],
[
"Romano",
"Joseph D.",
""
]
] | The expansion of the universe is often viewed as a uniform stretching of space that would affect compact objects, atoms and stars, as well as the separation of galaxies. One usually hears that bound systems do not take part in the general expansion, but a much more subtle question is whether bound systems expand partia... |
1008.2125 | Massimiliano Rinaldi | Carlos Mayoral, Alessandro Fabbri and Massimiliano Rinaldi | Step-like discontinuities in Bose-Einstein condensates and Hawking
radiation: dispersion effects | One figure and few comments added. Version accepted for publication
in PRD | Phys.Rev.D83:124047,2011 | 10.1103/PhysRevD.83.124047 | null | gr-qc cond-mat.quant-gas hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we extend the hydrodynamic results of [1] and study,
analytically, the propagation of Bogoliubov phonons on top of Bose-Einstein
condensates with step-like discontinuities by taking into account dispersion
effects. We focus on the Hawking signal in the density-density correlations in
the formation of ac... | [
{
"created": "Thu, 12 Aug 2010 15:02:24 GMT",
"version": "v1"
},
{
"created": "Fri, 27 May 2011 13:42:41 GMT",
"version": "v2"
}
] | 2011-07-28 | [
[
"Mayoral",
"Carlos",
""
],
[
"Fabbri",
"Alessandro",
""
],
[
"Rinaldi",
"Massimiliano",
""
]
] | In this paper we extend the hydrodynamic results of [1] and study, analytically, the propagation of Bogoliubov phonons on top of Bose-Einstein condensates with step-like discontinuities by taking into account dispersion effects. We focus on the Hawking signal in the density-density correlations in the formation of acou... |
2010.14518 | Francois Foucart | Francois Foucart, Alexander Chernoglazov, Michael Boyle, Tanja
Hinderer, Max Miller, Jordan Moxon, Mark A. Scheel, Nils Deppe, Matthew D.
Duez, Francois Hebert, Lawrence E. Kidder, William Throwe, Harald P. Pfeiffer | High-accuracy waveforms for black hole-neutron star systems with
spinning black holes | 16p, 14 figs, 2 tables; To be submitted to PRD | Phys. Rev. D 103, 064007 (2021) | 10.1103/PhysRevD.103.064007 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The availability of accurate numerical waveforms is an important requirement
for the creation and calibration of reliable waveform models for gravitational
wave astrophysics. For black hole-neutron star binaries, very few accurate
waveforms are however publicly available. Most recent models are calibrated to
a large ... | [
{
"created": "Tue, 27 Oct 2020 18:00:01 GMT",
"version": "v1"
}
] | 2021-03-10 | [
[
"Foucart",
"Francois",
""
],
[
"Chernoglazov",
"Alexander",
""
],
[
"Boyle",
"Michael",
""
],
[
"Hinderer",
"Tanja",
""
],
[
"Miller",
"Max",
""
],
[
"Moxon",
"Jordan",
""
],
[
"Scheel",
"Mark A.",
""
],
... | The availability of accurate numerical waveforms is an important requirement for the creation and calibration of reliable waveform models for gravitational wave astrophysics. For black hole-neutron star binaries, very few accurate waveforms are however publicly available. Most recent models are calibrated to a large nu... |
gr-qc/0107073 | Giovanni Modanese | G. Modanese (Univ. of Bolzano and CIPA - Palo Alto) | Local contribution of a quantum condensate to the vacuum energy density | LaTeX, 8 pages. Final journal version | Mod.Phys.Lett. A18 (2003) 683-690 | 10.1142/S0217732303009812 | null | gr-qc | null | We evaluate the local contribution g_[mu nu]L of coherent matter with
lagrangian density L to the vacuum energy density. Focusing on the case of
superconductors obeying the Ginzburg-Landau equation, we express the
relativistic invariant density L in terms of low-energy quantities containing
the pairs density. We disc... | [
{
"created": "Mon, 23 Jul 2001 14:43:59 GMT",
"version": "v1"
},
{
"created": "Sun, 14 Oct 2001 14:53:43 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Feb 2002 17:07:40 GMT",
"version": "v3"
},
{
"created": "Sat, 6 Jul 2002 13:09:55 GMT",
"version": "v4"
},
{
"cr... | 2009-11-07 | [
[
"Modanese",
"G.",
"",
"Univ. of Bolzano and CIPA - Palo Alto"
]
] | We evaluate the local contribution g_[mu nu]L of coherent matter with lagrangian density L to the vacuum energy density. Focusing on the case of superconductors obeying the Ginzburg-Landau equation, we express the relativistic invariant density L in terms of low-energy quantities containing the pairs density. We discus... |
1709.01512 | Soumya Chakrabarti | Soumya Chakrabarti | Aspects of Gravitational Collapse and the formation of Spacetime
Singularities | 146 pages, PhD thesis, IISER Kolkata, Sep 2017. arXiv admin note:
text overlap with arXiv:1409.2371, arXiv:1305.1005, arXiv:0810.2602,
arXiv:1310.7167 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Possibilities emerging out of the dynamical evolutions of collapsing systems
are addressed in this thesis through analytical investigations of the highly
non-linear Einstein Field Equations. Studies of exact solutions and their
properties, play a non-trivial role in general relativity, even in the current
context. Fi... | [
{
"created": "Tue, 5 Sep 2017 07:10:14 GMT",
"version": "v1"
}
] | 2017-09-07 | [
[
"Chakrabarti",
"Soumya",
""
]
] | Possibilities emerging out of the dynamical evolutions of collapsing systems are addressed in this thesis through analytical investigations of the highly non-linear Einstein Field Equations. Studies of exact solutions and their properties, play a non-trivial role in general relativity, even in the current context. Find... |
2001.08690 | Hor\'acio Vieira | H. S. Vieira | Scalar fields in a five-dimensional Lovelock black hole spacetime | 19 pages, 4 figures, 4 tables | Annals of Physics 418 (2020) 168197 | 10.1016/j.aop.2020.168197 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the interaction between massive scalar fields and the gravitational
field produced by a higher dimensional Schwarzschild solution in a string cloud
model. Exact analytical solutions of both angular and radial parts of the
Klein--Gordon equation are obtained in terms of the three-dimensional spherical
harmoni... | [
{
"created": "Thu, 23 Jan 2020 17:34:40 GMT",
"version": "v1"
},
{
"created": "Sat, 16 May 2020 17:24:17 GMT",
"version": "v2"
}
] | 2020-05-19 | [
[
"Vieira",
"H. S.",
""
]
] | We study the interaction between massive scalar fields and the gravitational field produced by a higher dimensional Schwarzschild solution in a string cloud model. Exact analytical solutions of both angular and radial parts of the Klein--Gordon equation are obtained in terms of the three-dimensional spherical harmonics... |
gr-qc/9506081 | Arkadiusz Blaut | Arkadiusz Blaut and Jerzy Kowalski-Glikman | Quantum Potential Approach to Quantum Cosmology | 17 pages,LaTeX. A newer version of this paper appears as
gr-qc/9509040 since the author didn't use the replace command. | null | null | null | gr-qc | null | In this paper we discuss the quantum potential approach of Bohm in the
context of quantum cosmological model. This approach makes it possible to
convert the wavefunction of the universe to a set of equations describing the
time evolution of the universe. Following Ashtekar et.\ al., we make use of
quantum canonical t... | [
{
"created": "Fri, 30 Jun 1995 12:25:06 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jul 1995 13:41:01 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Jul 1995 11:26:45 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Blaut",
"Arkadiusz",
""
],
[
"Kowalski-Glikman",
"Jerzy",
""
]
] | In this paper we discuss the quantum potential approach of Bohm in the context of quantum cosmological model. This approach makes it possible to convert the wavefunction of the universe to a set of equations describing the time evolution of the universe. Following Ashtekar et.\ al., we make use of quantum canonical tra... |
gr-qc/9905012 | Larry Ford | C.-H. Wu and L.H. Ford | Fluctuations of the Hawking Flux | 25 pages, LaTeX, with 3 figures, uses epsf | Phys. Rev. D 60, 104013 (1999) | 10.1103/PhysRevD.60.104013 | null | gr-qc hep-th quant-ph | null | The fluctuations of the flux radiated by an evaporating black hole will be
discussed. Two approaches to this problem will be adopted. In the first, the
squared flux operator is defined by normal ordering. In this case, both the
mean flux and the mean squared flux are well defined local quantites. It is
shown that the... | [
{
"created": "Tue, 4 May 1999 19:25:14 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Wu",
"C. -H.",
""
],
[
"Ford",
"L. H.",
""
]
] | The fluctuations of the flux radiated by an evaporating black hole will be discussed. Two approaches to this problem will be adopted. In the first, the squared flux operator is defined by normal ordering. In this case, both the mean flux and the mean squared flux are well defined local quantites. It is shown that the f... |
gr-qc/0607005 | S. Mignemi | S. Mignemi | Black hole solutions of dimensionally reduced Einstein-Gauss-Bonnet
gravity | 11 pages, plain TeX. The paper has been completely rewritten using
new coordinates that give a more transparent picture of the phase space | Phys.Rev.D74:124008,2006 | 10.1103/PhysRevD.74.124008 | null | gr-qc | null | We study the phase space of the spherically symmetric solutions of the system
obtained from the dimensional reduction of the six-dimensional Einstein-Gauss-
Bonnet action. We show the existence of solutions with nonflat asymptotic
behavior.
| [
{
"created": "Mon, 3 Jul 2006 10:37:20 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Aug 2006 10:18:23 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Mignemi",
"S.",
""
]
] | We study the phase space of the spherically symmetric solutions of the system obtained from the dimensional reduction of the six-dimensional Einstein-Gauss- Bonnet action. We show the existence of solutions with nonflat asymptotic behavior. |
2206.08694 | Chen Lan | Chen Lan, Yan-Gang Miao and Yi-Xiong Zang | Regular black holes with improved energy conditions and their analogues
in fluids | 38 pages, 30 figures, published version in Chinese Physics C | Chin. Phys. C 47, no.5,052001 (2023) | 10.1088/1674-1137/acc1cd | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | On the premise of the importance of energy conditions for regular black
holes, we propose a method to remedy those models that break the dominant
energy condition, e.g., the Bardeen and Hayward black holes. We modify the
metrics but ensure their regularity at the same time, so that the weak, null,
and dominant energy... | [
{
"created": "Fri, 17 Jun 2022 11:26:24 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Apr 2023 10:54:35 GMT",
"version": "v2"
}
] | 2023-04-14 | [
[
"Lan",
"Chen",
""
],
[
"Miao",
"Yan-Gang",
""
],
[
"Zang",
"Yi-Xiong",
""
]
] | On the premise of the importance of energy conditions for regular black holes, we propose a method to remedy those models that break the dominant energy condition, e.g., the Bardeen and Hayward black holes. We modify the metrics but ensure their regularity at the same time, so that the weak, null, and dominant energy c... |
1712.04267 | Francesco Zappa | Francesco Zappa, Sebastiano Bernuzzi, David Radice, Albino Perego, and
Tim Dietrich | Gravitational-wave luminosity of binary neutron stars mergers | 5 pages, 4 figures | Phys. Rev. Lett. 120, 111101 (2018) | 10.1103/PhysRevLett.120.111101 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the gravitational-wave peak luminosity and radiated energy of
quasicircular neutron star mergers using a large sample of numerical relativity
simulations with different binary parameters and input physics. The peak
luminosity for all the binaries can be described in terms of the mass ratio and
of the leading... | [
{
"created": "Tue, 12 Dec 2017 12:41:25 GMT",
"version": "v1"
}
] | 2018-03-21 | [
[
"Zappa",
"Francesco",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Radice",
"David",
""
],
[
"Perego",
"Albino",
""
],
[
"Dietrich",
"Tim",
""
]
] | We study the gravitational-wave peak luminosity and radiated energy of quasicircular neutron star mergers using a large sample of numerical relativity simulations with different binary parameters and input physics. The peak luminosity for all the binaries can be described in terms of the mass ratio and of the leading-o... |
2104.13009 | Hernando Quevedo | Luis Aragon-Munoz and Hernando Quevedo | Symplectic structure of equilibrium thermodynamics | New sections, comments and references added. Final version to appear
in IJGMMP | null | 10.1142/S021988782250178X | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The contact geometric structure of the thermodynamic phase space is used to
introduce a novel symplectic structure on the tangent bundle of the equilibrium
space. Moreover, it turns out that the equilibrium space can be interpreted as
a Lagrange submanifold of the corresponding tangent bundle, if the fundamental
equa... | [
{
"created": "Tue, 27 Apr 2021 07:11:43 GMT",
"version": "v1"
},
{
"created": "Wed, 5 May 2021 07:38:29 GMT",
"version": "v2"
},
{
"created": "Wed, 29 Jun 2022 21:06:27 GMT",
"version": "v3"
}
] | 2022-10-05 | [
[
"Aragon-Munoz",
"Luis",
""
],
[
"Quevedo",
"Hernando",
""
]
] | The contact geometric structure of the thermodynamic phase space is used to introduce a novel symplectic structure on the tangent bundle of the equilibrium space. Moreover, it turns out that the equilibrium space can be interpreted as a Lagrange submanifold of the corresponding tangent bundle, if the fundamental equati... |
gr-qc/9801003 | Hagen Kleinert | Hagen Kleinert | Nonholonomic Mapping Principle for Classical Mechanics in Spaces with
Curvature and Torsion. New Covariant Conservation Law for Energy-Momentum
Tensor | Corrected typos. Author Information under
http://www.physik.fu-berlin.de/~kleinert/institution.html . Paper also at
http://www.physik.fu-berlin.de/~kleinert/kleiner_re261/preprint.html | Gen.Rel.Grav. D32 (2000) 769 | 10.1023/A:1001962922592 | null | gr-qc | null | The lecture explains the geometric basis for the recently-discovered
nonholonomic mapping principle which specifies certain laws of nature in
spacetimes with curvature and torsion from those in flat spacetime, thus
replacing and extending Einstein's equivalence principle. An important
consequence is a new action prin... | [
{
"created": "Sat, 3 Jan 1998 07:41:44 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jan 1998 10:04:36 GMT",
"version": "v2"
},
{
"created": "Thu, 15 Jan 1998 06:48:12 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Kleinert",
"Hagen",
""
]
] | The lecture explains the geometric basis for the recently-discovered nonholonomic mapping principle which specifies certain laws of nature in spacetimes with curvature and torsion from those in flat spacetime, thus replacing and extending Einstein's equivalence principle. An important consequence is a new action princi... |
gr-qc/9902020 | Brien C. Nolan | Brien C. Nolan | A regular C^0 singularity is not necessarily weak | null | null | null | null | gr-qc | null | Examples of space-times are given which contain scalar curvature
singularities whereat the metric tensor is regular and continuous, but which
are gravitationally strong. Thus the argument that such singularities are
necessarily weak is incomplete; in particular the question of the gravitational
strength of the null C... | [
{
"created": "Tue, 9 Feb 1999 14:51:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Nolan",
"Brien C.",
""
]
] | Examples of space-times are given which contain scalar curvature singularities whereat the metric tensor is regular and continuous, but which are gravitationally strong. Thus the argument that such singularities are necessarily weak is incomplete; in particular the question of the gravitational strength of the null Cau... |
gr-qc/9809065 | Jiri Podolsky | J. Podolsky, K. Vesely | Chaotic motion in pp-wave spacetimes | 15 pages (latex),12 figures (gif), to appear in Class. Quantum Grav | Class.Quant.Grav. 15 (1998) 3505-3521 | 10.1088/0264-9381/15/11/015 | KTF MFF UK JP7 | gr-qc | null | We investigate geodesics in non-homogeneous vacuum pp-wave solutions and
demonstrate their chaotic behavior by rigorous analytic and numerical methods.
For the particular class of solutions considered, distinct "outcomes" (channels
to infinity) are identified, and it is shown that the boundary between
different outco... | [
{
"created": "Wed, 23 Sep 1998 15:06:22 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Podolsky",
"J.",
""
],
[
"Vesely",
"K.",
""
]
] | We investigate geodesics in non-homogeneous vacuum pp-wave solutions and demonstrate their chaotic behavior by rigorous analytic and numerical methods. For the particular class of solutions considered, distinct "outcomes" (channels to infinity) are identified, and it is shown that the boundary between different outcome... |
gr-qc/9902083 | Valerio Faraoni | Valerio Faraoni (Universite' Libre de Bruxelles) | Illusions of general relativity in Brans-Dicke gravity | 16 pages, LaTeX, to appear in Physical Review D | Phys.Rev.D59:084021,1999 | 10.1103/PhysRevD.59.084021 | null | gr-qc astro-ph | null | Contrary to common belief, the standard tenet of Brans-Dicke theory reducing
to general relativity when omega tends to infinity is false if the trace of the
matter energy-momentum tensor vanishes. The issue is clarified in a new
approach using conformal transformations. The otherwise unaccountable limiting
behavior o... | [
{
"created": "Fri, 26 Feb 1999 10:48:04 GMT",
"version": "v1"
}
] | 2011-08-17 | [
[
"Faraoni",
"Valerio",
"",
"Universite' Libre de Bruxelles"
]
] | Contrary to common belief, the standard tenet of Brans-Dicke theory reducing to general relativity when omega tends to infinity is false if the trace of the matter energy-momentum tensor vanishes. The issue is clarified in a new approach using conformal transformations. The otherwise unaccountable limiting behavior of ... |
1401.1366 | Stefano Bertone | Stefano Bertone, Alberto Vecchiato, Christophe Le Poncin-Lafitte,
Mariateresa Crosta and Luca Bianchi | Latest advances in an astrometric model based on the Time Transfer
Functions formalism | 4 pages, 2 figures, submitted to the Proceedings of the "Journ\'ees
Syst\`emes de R\'ef\'erence Spatio-Temporels 2013" | null | null | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Given the extreme accuracy of modern space astrometry, a precise relativistic
modeling of observations is required. Moreover, the availability of several
models formulated in different and independent ways is a security against the
presence of systematic errors in the analysis of future experimental results,
like in ... | [
{
"created": "Tue, 7 Jan 2014 13:27:24 GMT",
"version": "v1"
}
] | 2014-01-08 | [
[
"Bertone",
"Stefano",
""
],
[
"Vecchiato",
"Alberto",
""
],
[
"Poncin-Lafitte",
"Christophe Le",
""
],
[
"Crosta",
"Mariateresa",
""
],
[
"Bianchi",
"Luca",
""
]
] | Given the extreme accuracy of modern space astrometry, a precise relativistic modeling of observations is required. Moreover, the availability of several models formulated in different and independent ways is a security against the presence of systematic errors in the analysis of future experimental results, like in th... |
2205.15329 | Lorenzo Rossi | Lorenzo Rossi | Numerical Cauchy evolution of asymptotically AdS spacetimes with no
symmetries | Ph.D. thesis - few typos removed and bibliography improved | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this thesis, I present the first numerical scheme able to perform Cauchy
evolutions of asymptotically AdS spacetimes with reflective boundary conditions
under no symmetry requirements on the solution. The scheme is based on the
generalised harmonic formulation of the Einstein equations. The main difficulty
in remo... | [
{
"created": "Mon, 30 May 2022 18:00:01 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Aug 2022 11:29:54 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Nov 2023 23:23:55 GMT",
"version": "v3"
}
] | 2023-11-27 | [
[
"Rossi",
"Lorenzo",
""
]
] | In this thesis, I present the first numerical scheme able to perform Cauchy evolutions of asymptotically AdS spacetimes with reflective boundary conditions under no symmetry requirements on the solution. The scheme is based on the generalised harmonic formulation of the Einstein equations. The main difficulty in removi... |
gr-qc/0106035 | Hans-Juergen Schmidt | H.-J. Schmidt | Comparing selfinteracting scalar fields and R + R^3 cosmological models | 16 pages, LaTeX | Astron.Nachr.308:183,1987 | 10.1002/asna.2113080309 | Report UNIPO-MATH-01-Jun-04 | gr-qc | null | We generalize the well-known analogies between m^2 \phi^2 and R + R^2
theories to include the selfinteraction \lambda \phi^4-term for the scalar
field. It turns out to be the R + R^3 Lagrangian which gives an appropriate
model for it. Considering a spatially flat Friedman cosmological model, common
and different prop... | [
{
"created": "Mon, 11 Jun 2001 14:23:56 GMT",
"version": "v1"
}
] | 2011-04-22 | [
[
"Schmidt",
"H. -J.",
""
]
] | We generalize the well-known analogies between m^2 \phi^2 and R + R^2 theories to include the selfinteraction \lambda \phi^4-term for the scalar field. It turns out to be the R + R^3 Lagrangian which gives an appropriate model for it. Considering a spatially flat Friedman cosmological model, common and different proper... |
0805.3017 | Shahram Jalalzadeh | S. Jalalzadeh and A. M. Yazdani | Variation of mass in primordial nucleosynthesis as a test of Induced
Matter Brane Gravity | 11 pages, to appear in PLB | Phys.Lett.B664:229-234,2008 | 10.1016/j.physletb.2008.05.041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The variation of mass in induced matter theory using Ceroch-Stewart-Walter
perturbations of submanifolds [1] is redefined. It is shown that the deviation
of primordial Helium production due to a variation on the difference between
the rest mass of the nucleus is in agrement with induced matter brane gravity.
| [
{
"created": "Tue, 20 May 2008 07:35:11 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Jalalzadeh",
"S.",
""
],
[
"Yazdani",
"A. M.",
""
]
] | The variation of mass in induced matter theory using Ceroch-Stewart-Walter perturbations of submanifolds [1] is redefined. It is shown that the deviation of primordial Helium production due to a variation on the difference between the rest mass of the nucleus is in agrement with induced matter brane gravity. |
gr-qc/0304004 | Guido Pizzella | P. Astone, D. Babusci, M. Bassan, P. Bonifazi, P. Carelli, G.
Cavallari, E. Coccia, C. Cosmelli, S. D'Antonio, V. Fafone, S. Frasca, G.
Giordano, A. Marini, Y. Minenkov, I. Modena, G. Modestino, A. Moleti, G. V.
Pallottino, G. Pizzella, L. Quintieri, A. Rocchi, F. Ronga, R. Terenzi, G.
Torrioli, M. Visco | Comments on the 2001 run of the EXPLORER/NAUTILUS gravitational wave
experiment | To appear in Classical and Quantum Gravity | null | 10.1088/0264-9381/20/17/321 | null | gr-qc | null | The recently published analysis of the coincidences between the EXPLORER and
NAUTILUS gravitational wave detectors in the year 2001 (Astone et al. 2002) has
drawn some criticism (Finn 2003). We do not hold with these objections, even if
we agree that no claim can be made with our data. The paper we published
reports ... | [
{
"created": "Tue, 1 Apr 2003 09:43:29 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Apr 2003 07:08:34 GMT",
"version": "v2"
},
{
"created": "Fri, 1 Aug 2003 07:35:33 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Astone",
"P.",
""
],
[
"Babusci",
"D.",
""
],
[
"Bassan",
"M.",
""
],
[
"Bonifazi",
"P.",
""
],
[
"Carelli",
"P.",
""
],
[
"Cavallari",
"G.",
""
],
[
"Coccia",
"E.",
""
],
[
"Cosmelli",
"C.",
... | The recently published analysis of the coincidences between the EXPLORER and NAUTILUS gravitational wave detectors in the year 2001 (Astone et al. 2002) has drawn some criticism (Finn 2003). We do not hold with these objections, even if we agree that no claim can be made with our data. The paper we published reports da... |
1807.07323 | German Sharov | G. S. Sharov and V. O. Vasiliev | How predictions of cosmological models depend on Hubble parameter data
sets | 15 pages, 5 figures, published in Mathematical Modelling and
Geometry, http://mmg.tversu.ru | Mathematical Modelling and Geometry, V. 6, No 1, pp. 1 - 20 (2018) | 10.26456/mmg/2018-611 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore recent estimations of the Hubble parameter $H$ depending on
redshift $z$, which include 31 $H(z)$ data points measured from differential
ages of galaxies and 26 data points, obtained with other methods. We describe
these data together with Union 2.1 observations of Type Ia supernovae and
observed parameter... | [
{
"created": "Thu, 19 Jul 2018 10:00:27 GMT",
"version": "v1"
}
] | 2018-07-20 | [
[
"Sharov",
"G. S.",
""
],
[
"Vasiliev",
"V. O.",
""
]
] | We explore recent estimations of the Hubble parameter $H$ depending on redshift $z$, which include 31 $H(z)$ data points measured from differential ages of galaxies and 26 data points, obtained with other methods. We describe these data together with Union 2.1 observations of Type Ia supernovae and observed parameters ... |
gr-qc/0505003 | Alikram Aliev | A. N. Aliev | A Slowly Rotating Charged Black Hole in Five Dimensions | Talk given at GR17: 17th International Conference on General
Relativity and Gravitation, Dublin, 18-24 Jule,2004 ; Corrected typos, minor
changes, new formula added | Mod.Phys.Lett. A21 (2006) 751-758 | 10.1142/S0217732306019281 | null | gr-qc hep-th | null | Black hole solutions in higher dimensional Einstein and Einstein-Maxwell
gravity have been discussed by Tangherlini as well as Myers and Perry a long
time ago. These solutions are the generalizations of the familiar
Schwarzschild, Reissner-Nordstrom and Kerr solutions of four-dimensional
general relativity. However, ... | [
{
"created": "Sat, 30 Apr 2005 19:51:40 GMT",
"version": "v1"
},
{
"created": "Tue, 3 May 2005 06:17:03 GMT",
"version": "v2"
},
{
"created": "Tue, 31 May 2005 16:20:30 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Aliev",
"A. N.",
""
]
] | Black hole solutions in higher dimensional Einstein and Einstein-Maxwell gravity have been discussed by Tangherlini as well as Myers and Perry a long time ago. These solutions are the generalizations of the familiar Schwarzschild, Reissner-Nordstrom and Kerr solutions of four-dimensional general relativity. However, hi... |
2307.04459 | Yu Zhang | Qian Li, Yu Zhang, Qi-Quan Li, Qi Sun | Thermal fluctuation, deflection angle and greybody factor of a
high-dimensional Schwarzschild black hole in STVG | 13 pages, 11 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we study the thermal fluctuation, deflection angle and greybody
factor of the high-dimensional Schwarzschild black hole in scalar-tensor-vector
gravity (STVG). Based on the correction of black hole entropy due to thermal
fluctuation, we calculate some thermodynamic quantities associated with the
correct... | [
{
"created": "Mon, 10 Jul 2023 10:12:28 GMT",
"version": "v1"
}
] | 2023-07-11 | [
[
"Li",
"Qian",
""
],
[
"Zhang",
"Yu",
""
],
[
"Li",
"Qi-Quan",
""
],
[
"Sun",
"Qi",
""
]
] | In this work, we study the thermal fluctuation, deflection angle and greybody factor of the high-dimensional Schwarzschild black hole in scalar-tensor-vector gravity (STVG). Based on the correction of black hole entropy due to thermal fluctuation, we calculate some thermodynamic quantities associated with the correctio... |
1011.3166 | Antonio C. Guti\'errez-Pi\~neres | Antonio C. Guti\'errez-Pi\~neres and Guillermo A. Gonz\'alez | An infinite family of magnetized Morgan-Morgan relativistic thin disks | Submitted to IJTP. This paper is a revised and extended version of a
paper that was presented at arXiv:1006.2032 | null | 10.1007/s10773-011-1051-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Applying the Horsk\'y-Mitskievitch conjecture to the empty space solutions of
Morgan and Morgan due to the gravitational field of a finite disk, we have
obtained the corresponding solutions of the Einstein-Maxwell equations. The
resulting expressions are simply written in terms of oblate spheroidal
coordinates and th... | [
{
"created": "Sat, 13 Nov 2010 23:41:58 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Dec 2011 16:34:02 GMT",
"version": "v2"
}
] | 2015-05-20 | [
[
"Gutiérrez-Piñeres",
"Antonio C.",
""
],
[
"González",
"Guillermo A.",
""
]
] | Applying the Horsk\'y-Mitskievitch conjecture to the empty space solutions of Morgan and Morgan due to the gravitational field of a finite disk, we have obtained the corresponding solutions of the Einstein-Maxwell equations. The resulting expressions are simply written in terms of oblate spheroidal coordinates and the ... |
1612.06292 | Nikodem Poplawski | Nikodem Pop{\l}awski | Primordial fluctuations of scale factor in closed Universe in
Einstein$-$Cartan gravity | 9 pages; published version | Mod. Phys. Lett. A 33, 1850236 (2018) | 10.1142/S021773231850236X | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a homogeneous and isotropic Universe, described by the
minisuperspace Lagrangian with the scale factor as a generalized coordinate. We
show that the energy of a closed Universe is zero. We apply the uncertainty
principle to this Lagrangian and propose that the quantum uncertainty of the
scale factor cause... | [
{
"created": "Mon, 19 Dec 2016 17:56:28 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Feb 2019 17:32:26 GMT",
"version": "v2"
}
] | 2019-02-26 | [
[
"Popławski",
"Nikodem",
""
]
] | We consider a homogeneous and isotropic Universe, described by the minisuperspace Lagrangian with the scale factor as a generalized coordinate. We show that the energy of a closed Universe is zero. We apply the uncertainty principle to this Lagrangian and propose that the quantum uncertainty of the scale factor causes ... |
1810.07957 | Shinji Tsujikawa | Noemi Frusciante, Ryotaro Kase, Nelson J. Nunes, Shinji Tsujikawa | Most general cubic-order Horndeski Lagrangian allowing for scaling
solutions and the application to dark energy | 17 pages, 3 figures, version to appear in Physical Review D | Phys. Rev. D 98, 123517 (2018) | 10.1103/PhysRevD.98.123517 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In cubic-order Horndeski theories where a scalar field $\phi$ is coupled to
nonrelativistic matter with a field-dependent coupling $Q(\phi)$, we derive the
most general Lagrangian having scaling solutions on the isotropic and
homogenous cosmological background. For constant $Q$ including the case of
vanishing couplin... | [
{
"created": "Thu, 18 Oct 2018 09:19:09 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Dec 2018 00:04:53 GMT",
"version": "v2"
}
] | 2018-12-27 | [
[
"Frusciante",
"Noemi",
""
],
[
"Kase",
"Ryotaro",
""
],
[
"Nunes",
"Nelson J.",
""
],
[
"Tsujikawa",
"Shinji",
""
]
] | In cubic-order Horndeski theories where a scalar field $\phi$ is coupled to nonrelativistic matter with a field-dependent coupling $Q(\phi)$, we derive the most general Lagrangian having scaling solutions on the isotropic and homogenous cosmological background. For constant $Q$ including the case of vanishing coupling,... |
gr-qc/0202044 | Jorge Pullin | Jorge Pullin | Matters of Gravity, the newsletter of the APS Topical Group on
Gravitation, Spring 2002 | 19 pages, LaTeX with html.sty. PDF and html versions in
http://www.phys.psu.edu/mog | null | null | MOG-19 | gr-qc | null | Community News:
- Center for Gravitational Wave Physics, by Sam Finn
- Perimeter Institute for Theoretical Physics, by Lee Smolin
Research Briefs:
- Detector and Data Developments within GEO 600, by Alicia Sintes
- The Virtual Data Grid and LIGO, by Pat Brady and Manuela Campanelli
- 1000 hours of data an... | [
{
"created": "Wed, 13 Feb 2002 02:54:44 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pullin",
"Jorge",
""
]
] | Community News: - Center for Gravitational Wave Physics, by Sam Finn - Perimeter Institute for Theoretical Physics, by Lee Smolin Research Briefs: - Detector and Data Developments within GEO 600, by Alicia Sintes - The Virtual Data Grid and LIGO, by Pat Brady and Manuela Campanelli - 1000 hours of data and first lock o... |
gr-qc/0407036 | Masaru Shibata | Masaru Shibata, Koji Uryu, and John L. Friedman | Deriving formulations for numerical computation of binary neutron stars
in quasicircular orbits | to be published in Phys. Rev. D | Phys.Rev.D70:044044,2004; Erratum-ibid.D70:129901,2004 | 10.1103/PhysRevD.70.044044 10.1103/PhysRevD.70.129901 | null | gr-qc | null | Two relations, the virial relation $M_{\rm ADM}=M_{\rm K}$ and the first law
in the form $\delta M_{\rm ADM}=\Omega \delta J$, should be satisfied by a
solution and a sequence of solutions describing binary compact objects in
quasiequilibrium circular orbits. Here, $M_{\rm ADM}$, $M_{\rm K}$, $J$, and
$\Omega$ are th... | [
{
"created": "Fri, 9 Jul 2004 02:21:38 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Shibata",
"Masaru",
""
],
[
"Uryu",
"Koji",
""
],
[
"Friedman",
"John L.",
""
]
] | Two relations, the virial relation $M_{\rm ADM}=M_{\rm K}$ and the first law in the form $\delta M_{\rm ADM}=\Omega \delta J$, should be satisfied by a solution and a sequence of solutions describing binary compact objects in quasiequilibrium circular orbits. Here, $M_{\rm ADM}$, $M_{\rm K}$, $J$, and $\Omega$ are the ... |
gr-qc/9810012 | WU Zhong Chao | Wu Zhong Chao (Beijing Normal University) | Pair Creation of Black Hole in Anti-de Sitter Space Background | null | Phys.Lett.B445:274,1999 | 10.1016/S0370-2693(98)01509-3 | Beijing Preprint 98-108 | gr-qc astro-ph hep-th | null | In the absence of a general no-boundary proposal for open creation, the
complex constrained instanton is used as the seed for the open pair creations
of black holes in the Kerr-Newman-anti-de Sitter family. The relative
probability of the chargeless and nonrotating black hole pair is the
exponential of the negative o... | [
{
"created": "Mon, 5 Oct 1998 22:08:02 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Oct 1998 16:00:49 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Oct 1998 19:44:35 GMT",
"version": "v3"
},
{
"created": "Thu, 28 Jan 1999 15:58:08 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Chao",
"Wu Zhong",
"",
"Beijing Normal University"
]
] | In the absence of a general no-boundary proposal for open creation, the complex constrained instanton is used as the seed for the open pair creations of black holes in the Kerr-Newman-anti-de Sitter family. The relative probability of the chargeless and nonrotating black hole pair is the exponential of the negative of ... |
1808.06485 | Sunandan Gangopadhyay | Sukanta Bhattacharyya, Sunandan Gangopadhyay, Anirban Saha | Footprint of spatial noncommutativity in resonant detectors of
gravitational wave | 11 pages Latex, comments are welcome | Class. Quantum Grav. 36 (2019) 055006 | 10.1088/1361-6382/ab008a | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present day gravitational wave (GW) detectors strive to detect the length
variation $\delta L = h L$, which, owing to the smallness of the metric
perturbation $\sim h$, is an extremely small length $\mathcal{O} \sim 10^{-18}
- 10^{-21}$ meter. The recently proposed noncommutative structure of space has
a characte... | [
{
"created": "Thu, 16 Aug 2018 13:23:49 GMT",
"version": "v1"
}
] | 2019-02-12 | [
[
"Bhattacharyya",
"Sukanta",
""
],
[
"Gangopadhyay",
"Sunandan",
""
],
[
"Saha",
"Anirban",
""
]
] | The present day gravitational wave (GW) detectors strive to detect the length variation $\delta L = h L$, which, owing to the smallness of the metric perturbation $\sim h$, is an extremely small length $\mathcal{O} \sim 10^{-18} - 10^{-21}$ meter. The recently proposed noncommutative structure of space has a characteri... |
gr-qc/0210032 | Steve Drasco | Steve Drasco and Eanna E. Flanagan | Detection methods for non-Gaussian gravitational wave stochastic
backgrounds | 25 pages, 12 figures, submitted to physical review D, added revisions
in response to reviewers comments | Phys.Rev. D67 (2003) 082003 | 10.1103/PhysRevD.67.082003 | null | gr-qc astro-ph | null | We address the issue of finding an optimal detection method for a
discontinuous or intermittent gravitational wave stochastic background. Such a
signal might sound something like popcorn popping. We derive an appropriate
version of the maximum likelihood detection statistic, and compare its
performance to that of the... | [
{
"created": "Thu, 10 Oct 2002 17:44:44 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Feb 2003 20:55:23 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Drasco",
"Steve",
""
],
[
"Flanagan",
"Eanna E.",
""
]
] | We address the issue of finding an optimal detection method for a discontinuous or intermittent gravitational wave stochastic background. Such a signal might sound something like popcorn popping. We derive an appropriate version of the maximum likelihood detection statistic, and compare its performance to that of the s... |
gr-qc/9803039 | Wang Anzhong | Jos\'e A.C. Nogales and Anzhong Wang | Instability of cosmological event horizons of nonstatic global cosmic
strings II: perturbations of gravitational waves and massless scalar field | No figures, Revtex | Phys.Rev.D57:6089-6093,1998 | 10.1103/PhysRevD.57.6089 | null | gr-qc | null | The stability of the cosmological event horizons (CEHs) of a class of
non-static global cosmic strings is studied against perturbations of
gravitational waves and massless scalar field. It is found that the
perturbations of gravitational waves always turn the CEHs into non-scalar weak
spacetime curvature singularitie... | [
{
"created": "Wed, 11 Mar 1998 15:53:48 GMT",
"version": "v1"
}
] | 2009-07-07 | [
[
"Nogales",
"José A. C.",
""
],
[
"Wang",
"Anzhong",
""
]
] | The stability of the cosmological event horizons (CEHs) of a class of non-static global cosmic strings is studied against perturbations of gravitational waves and massless scalar field. It is found that the perturbations of gravitational waves always turn the CEHs into non-scalar weak spacetime curvature singularities,... |
2205.00270 | Sanjar Shaymatov | Sanjar Shaymatov, Mubasher Jamil, Kimet Jusufi, Kazuharu Bamba | Constraints on the magnetized Ernst black hole spacetime through
quasiperiodic oscillations | 11 pages, 10 captioned figures. Updated to match with the published
version | Eur. Phys. J. C (2022) 82:636 | 10.1140/epjc/s10052-022-10560-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the dynamics of test particles around a magnetized Ernst black hole
considering its magnetic field in the environment surrounding the black hole.
We show how its magnetic field can influence the dynamics of particles and
epicyclic motion around the black hole. Based on the analysis, we find that the
radius o... | [
{
"created": "Sat, 30 Apr 2022 13:42:31 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jun 2022 10:06:30 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Aug 2022 19:18:25 GMT",
"version": "v3"
}
] | 2022-08-10 | [
[
"Shaymatov",
"Sanjar",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Jusufi",
"Kimet",
""
],
[
"Bamba",
"Kazuharu",
""
]
] | We study the dynamics of test particles around a magnetized Ernst black hole considering its magnetic field in the environment surrounding the black hole. We show how its magnetic field can influence the dynamics of particles and epicyclic motion around the black hole. Based on the analysis, we find that the radius of ... |
2211.11708 | Manasse R. Mbonye | Manasse R. Mbonye | Is cosmic dynamics self-regulating? | Updated version submitted for review, 5 figures | Int. J. Mod. Phys. D 32 12 2350076-786 (2023) | 10.1142/S0218271823500761 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | In this paper we discuss a cosmological model for a universe with
self-regulating features. We set up the theoretical framework for the model and
determine the time evolution of the scale-factor $a(t)$. It is shown that such
a universe repeatedly goes through alternate periods of matter and dark energy
domination. Th... | [
{
"created": "Mon, 14 Nov 2022 17:11:01 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Nov 2022 13:50:32 GMT",
"version": "v2"
}
] | 2024-01-15 | [
[
"Mbonye",
"Manasse R.",
""
]
] | In this paper we discuss a cosmological model for a universe with self-regulating features. We set up the theoretical framework for the model and determine the time evolution of the scale-factor $a(t)$. It is shown that such a universe repeatedly goes through alternate periods of matter and dark energy domination. The ... |
1904.06572 | Masato Minamitsuji | Masato Minamitsuji and Taishi Ikeda | Spontaneous scalarization of black holes in the Horndeski theory | 24 pages, 7 figures, references added, typos corrected, published
version | Phys. Rev. D 99, 104069 (2019) | 10.1103/PhysRevD.99.104069 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the possibility of spontaneous scalarization of static,
spherically symmetric, and asymptotically flat black holes (BHs) in the
Horndeski theory. Spontaneous scalarization of BHs is a phenomenon that the
scalar field spontaneously obtains a nontrivial profile in the vicinity of the
event horizon via th... | [
{
"created": "Sat, 13 Apr 2019 17:13:14 GMT",
"version": "v1"
},
{
"created": "Thu, 30 May 2019 15:14:18 GMT",
"version": "v2"
}
] | 2019-05-31 | [
[
"Minamitsuji",
"Masato",
""
],
[
"Ikeda",
"Taishi",
""
]
] | We investigate the possibility of spontaneous scalarization of static, spherically symmetric, and asymptotically flat black holes (BHs) in the Horndeski theory. Spontaneous scalarization of BHs is a phenomenon that the scalar field spontaneously obtains a nontrivial profile in the vicinity of the event horizon via the ... |
2004.09208 | Naqing Xie | Xiaokai He and Naqing Xie | Hayward Quasilocal Energy of Tori | 11 pages, 6 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is dedicated to the investigation of the positivity of the Hayward
quasilocal energy of tori. Marginally trapped tori have nonnegative Hayward
energy. We consider a scenario of a spherically symmetric constant density star
matched to an exterior Schwarzschild solution. We show that any generic tori
within ... | [
{
"created": "Mon, 20 Apr 2020 11:20:03 GMT",
"version": "v1"
}
] | 2020-04-21 | [
[
"He",
"Xiaokai",
""
],
[
"Xie",
"Naqing",
""
]
] | This paper is dedicated to the investigation of the positivity of the Hayward quasilocal energy of tori. Marginally trapped tori have nonnegative Hayward energy. We consider a scenario of a spherically symmetric constant density star matched to an exterior Schwarzschild solution. We show that any generic tori within th... |
gr-qc/9803002 | Max Banados | Maximo Banados | Higher Dimensional Chern-Simons Theories and Topological Black Holes | 13 pages, Latex. Talk given at the Conference "Quantum Mechanics of
Fundamental Systems VI", Santiago, Chile, Aug 1997 | null | null | null | gr-qc | null | It has been recently pointed out that black holes of constant curvature with
a "chronological singularity" can be constructed in any spacetime dimension.
These black holes share many common properties with the 2+1 black hole. In this
contribution we give a brief summary of these new black holes and consider them
as s... | [
{
"created": "Sat, 28 Feb 1998 23:30:09 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Banados",
"Maximo",
""
]
] | It has been recently pointed out that black holes of constant curvature with a "chronological singularity" can be constructed in any spacetime dimension. These black holes share many common properties with the 2+1 black hole. In this contribution we give a brief summary of these new black holes and consider them as sol... |
gr-qc/0004049 | Grigori Volovik | G.E. Volovik | Links between gravity and dynamics of quantum liquids | RevTex file, 16 pages, no figures, prepared for Proceedings of IV
International Conference "Cosmology. Relativistic Astropohysics.
Cosmoparticle Physics" (COSMION-99) in the Honor of 80-th Birthday of Isaak
M. Khalatnikov | Grav.Cosmol.Suppl.6:187-203,2000 | null | null | gr-qc cond-mat hep-ph | null | We consider the Landau-Khalatnikov two-fluid hydrodynamics of superfluid
liquid as an effective theory, which provides a self-consistent analog of
Einstein equations for gravity and matter.
| [
{
"created": "Sun, 16 Apr 2000 11:55:03 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Volovik",
"G. E.",
""
]
] | We consider the Landau-Khalatnikov two-fluid hydrodynamics of superfluid liquid as an effective theory, which provides a self-consistent analog of Einstein equations for gravity and matter. |
2112.14166 | Adam Balcerzak | Adam Balcerzak and Mateusz Lisaj | Decaying universes and the emergence of Bell-type interuniversal
entanglement in varying fundamental constants cosmological model | 8 pages, 4 figures, revised, matches published version | Eur. Phys. J. C 82, 732 (2022) | 10.1140/epjc/s10052-022-10704-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider a high-curvature limit of the varying fundamental
constants toy model in which both the value of the speed of light and the value
of the gravitational constant are related to the values of the two
non-minimally coupled scalar fields. The high-curvature limit motivates the
application of the... | [
{
"created": "Tue, 28 Dec 2021 14:51:23 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Dec 2021 12:51:34 GMT",
"version": "v2"
},
{
"created": "Fri, 26 Aug 2022 10:48:06 GMT",
"version": "v3"
}
] | 2022-08-29 | [
[
"Balcerzak",
"Adam",
""
],
[
"Lisaj",
"Mateusz",
""
]
] | In this paper, we consider a high-curvature limit of the varying fundamental constants toy model in which both the value of the speed of light and the value of the gravitational constant are related to the values of the two non-minimally coupled scalar fields. The high-curvature limit motivates the application of the t... |
0902.4097 | Hakan Andreasson | Hakan Andreasson, Gerhard Rein | The asymptotic behaviour in Schwarzschild time of Vlasov matter in
spherically symmetric gravitational collapse | 22 pages | Math.Proc.Cambridge Phil.Soc.149:173-188,2010 | 10.1017/S0305004109990454 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Given a static Schwarzschild spacetime of ADM mass M, it is well-known that
no ingoing causal geodesic starting in the outer domain r>2M will cross the
event horizon r=2M in finite Schwarzschild time. In the present paper we show
that in gravitational collapse of Vlasov matter this behaviour can be very
different. We... | [
{
"created": "Tue, 24 Feb 2009 16:21:33 GMT",
"version": "v1"
}
] | 2011-02-01 | [
[
"Andreasson",
"Hakan",
""
],
[
"Rein",
"Gerhard",
""
]
] | Given a static Schwarzschild spacetime of ADM mass M, it is well-known that no ingoing causal geodesic starting in the outer domain r>2M will cross the event horizon r=2M in finite Schwarzschild time. In the present paper we show that in gravitational collapse of Vlasov matter this behaviour can be very different. We c... |
0909.4998 | Xinlian Luo | Luo Xin-Lian | Neutrino Lensing | 8 pages, 2 figures, uses iopart | Chin.Phys.Lett.26:10980,2009 | 10.1088/0256-307X/26/10/109801 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Due to the intrinsic properties of neutrinos, the gravitational lens effect
for neutrino should be more colorful and meaningful than the normal lens effect
of photon. Other than the oscillation experiments operated at terrestrial
laboratory, in principle, we can propose a completely new astrophysical method
to determ... | [
{
"created": "Mon, 28 Sep 2009 03:44:14 GMT",
"version": "v1"
}
] | 2010-04-30 | [
[
"Xin-Lian",
"Luo",
""
]
] | Due to the intrinsic properties of neutrinos, the gravitational lens effect for neutrino should be more colorful and meaningful than the normal lens effect of photon. Other than the oscillation experiments operated at terrestrial laboratory, in principle, we can propose a completely new astrophysical method to determin... |
2206.10055 | Yuchen Huang | Yuchen Huang, Jun Tao, Peng Wang and Shuxuan Ying | Phase transitions and thermodynamic geometry of a Kerr-Newman black hole
in a cavity | 25 pages, 8 figures | Eur.Phys.J.Plus 138 (2023) 3, 265 | 10.1140/epjp/s13360-023-03858-w | CTP-SCU/2022011 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Being placed in a cavity is an effective way of reaching thermodynamic
equilibrium for black holes. We investigate a Kerr-Newman black hole in a
cavity as well as compare it with two reduced cases, i.e., a RN black hole in a
cavity and a Kerr black hole in a cavity. We derive the quasi-local energy from
the Hamiltoni... | [
{
"created": "Tue, 21 Jun 2022 00:38:37 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Jun 2022 07:46:06 GMT",
"version": "v2"
},
{
"created": "Wed, 31 Aug 2022 13:34:51 GMT",
"version": "v3"
},
{
"created": "Mon, 5 Sep 2022 15:40:02 GMT",
"version": "v4"
}
] | 2023-06-06 | [
[
"Huang",
"Yuchen",
""
],
[
"Tao",
"Jun",
""
],
[
"Wang",
"Peng",
""
],
[
"Ying",
"Shuxuan",
""
]
] | Being placed in a cavity is an effective way of reaching thermodynamic equilibrium for black holes. We investigate a Kerr-Newman black hole in a cavity as well as compare it with two reduced cases, i.e., a RN black hole in a cavity and a Kerr black hole in a cavity. We derive the quasi-local energy from the Hamiltonian... |
0809.2474 | Farook Rahaman | M.Kalam, F.Rahaman, A.Ghosh and B. Raychaudhuri | Discussion on some characteristics of the Charged Brane-world Black
holes | 23 pages, 9 figures. To be appeared in Int.J.Mod.Phys.A | Int.J.Mod.Phys.A24:719-739,2009 | 10.1142/S0217751X09042542 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Several physical natures of charged brane-world black holes have been
investigated. At first, time-like and null geodesics of the charged brane-world
black holes are presented. We also analyze all the possible motions by plotting
the effective potentials for various parameters for circular and radial
geodesics. Secon... | [
{
"created": "Mon, 15 Sep 2008 10:09:52 GMT",
"version": "v1"
}
] | 2009-03-12 | [
[
"Kalam",
"M.",
""
],
[
"Rahaman",
"F.",
""
],
[
"Ghosh",
"A.",
""
],
[
"Raychaudhuri",
"B.",
""
]
] | Several physical natures of charged brane-world black holes have been investigated. At first, time-like and null geodesics of the charged brane-world black holes are presented. We also analyze all the possible motions by plotting the effective potentials for various parameters for circular and radial geodesics. Secondl... |
1207.5863 | Dennis Bessada | Dennis Bessada, Nelson Pinto-Neto, Beatriz B. Siffert, Oswaldo D.
Miranda | Stochastic background of relic gravitons in a bouncing quantum
cosmological model | 10 pages, 3 figures, to appear in JCAP | null | 10.1088/1475-7516/2012/11/054 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spectrum and amplitude of the stochastic background of relic gravitons
produced in a bouncing universe is calculated. The matter content of the model
consists of dust and radiation fluids, and the bounce occurs due to quantum
cosmological effects when the universe approaches the classical singularity in
the contr... | [
{
"created": "Wed, 25 Jul 2012 01:17:05 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Nov 2012 12:28:43 GMT",
"version": "v2"
}
] | 2015-06-05 | [
[
"Bessada",
"Dennis",
""
],
[
"Pinto-Neto",
"Nelson",
""
],
[
"Siffert",
"Beatriz B.",
""
],
[
"Miranda",
"Oswaldo D.",
""
]
] | The spectrum and amplitude of the stochastic background of relic gravitons produced in a bouncing universe is calculated. The matter content of the model consists of dust and radiation fluids, and the bounce occurs due to quantum cosmological effects when the universe approaches the classical singularity in the contrac... |
1605.05928 | Ahmed Farag Ali | Ahmed Farag Ali, Saurya Das | Stringent theoretical and experimental bounds on graviton mass | 3 pages, revtex4, no figures. This essay received an Honorable
mention in the 2016 Essay Competition of the Gravity Research Foundation | Int.J.Mod.Phys. D25 (2016) 1644001 | 10.1142/S0218271816440016 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show from theoretical considerations, that if the graviton is massive, its
mass is constrained to be about $10^{-32}~eV/c^2$. This estimate is consistent
with those obtained from experiments, including the recent gravitational wave
detection in advanced LIGO.
| [
{
"created": "Sat, 14 May 2016 02:14:44 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Jul 2016 15:01:48 GMT",
"version": "v2"
}
] | 2016-10-10 | [
[
"Ali",
"Ahmed Farag",
""
],
[
"Das",
"Saurya",
""
]
] | We show from theoretical considerations, that if the graviton is massive, its mass is constrained to be about $10^{-32}~eV/c^2$. This estimate is consistent with those obtained from experiments, including the recent gravitational wave detection in advanced LIGO. |
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