id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0510066 | Vilson T. Zanchin | Alex S. Miranda and Vilson T. Zanchin | Quasinormal modes of plane-symmetric anti-de Sitter black holes: a
complete analysis of the gravitational perturbations | Added new material on the asymptotic behavior of QNMs | Phys.Rev. D73 (2006) 064034 | 10.1103/PhysRevD.73.064034 | null | gr-qc hep-th | null | We study in detail the quasinormal modes of linear gravitational
perturbations of plane-symmetric anti-de Sitter black holes. The wave equations
are obtained by means of the Newman-Penrose formalism and the Chandrasekhar
transformation theory. We show that oscillatory modes decay exponentially with
time such that the... | [
{
"created": "Thu, 13 Oct 2005 23:21:19 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Oct 2005 09:39:18 GMT",
"version": "v2"
},
{
"created": "Thu, 30 Mar 2006 19:54:31 GMT",
"version": "v3"
}
] | 2016-03-25 | [
[
"Miranda",
"Alex S.",
""
],
[
"Zanchin",
"Vilson T.",
""
]
] | We study in detail the quasinormal modes of linear gravitational perturbations of plane-symmetric anti-de Sitter black holes. The wave equations are obtained by means of the Newman-Penrose formalism and the Chandrasekhar transformation theory. We show that oscillatory modes decay exponentially with time such that these... |
1907.13354 | Vittorio De Falco Dr | Vittorio De Falco, Emmanuele Battista | Analytical Rayleigh potential for the general relativistic
Poynting-Robertson effect | 4,6 pages, 0 figures, 0 tables. Accepted in Europhysics Letters in
date 31 July 2019 | null | 10.1209/0295-5075/127/30006 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We determine the analytic expression of the Rayleigh potential associated to
the general relativistic Poynting-Robertson effect. This constitutes the first
example of a physical dissipative system treated analytically in General
Relativity. The employed approach and further implications are discussed.
| [
{
"created": "Wed, 31 Jul 2019 07:49:45 GMT",
"version": "v1"
}
] | 2019-09-12 | [
[
"De Falco",
"Vittorio",
""
],
[
"Battista",
"Emmanuele",
""
]
] | We determine the analytic expression of the Rayleigh potential associated to the general relativistic Poynting-Robertson effect. This constitutes the first example of a physical dissipative system treated analytically in General Relativity. The employed approach and further implications are discussed. |
gr-qc/0211030 | Miguel S\'anchez | Antonio N. Bernal, Miguel S\'anchez (Univ. Granada) | Leibnizian, Galilean and Newtonian structures of spacetime | Minor errata corrected, to appear in J. Math. Phys.; 22 pages
including a table, Latex | J.Math.Phys. 44 (2003) 1129-1149 | 10.1063/1.1541120 | null | gr-qc math.DG | null | The following three geometrical structures on a manifold are studied in
detail: (1) Leibnizian: a non-vanishing 1-form $\Omega$ plus a Riemannian
metric $\h$ on its annhilator vector bundle. In particular, the possible
dimensions of the automorphism group of a Leibnizian G-structure are
characterized. (2) Galilean: L... | [
{
"created": "Fri, 8 Nov 2002 23:14:59 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Dec 2002 18:53:39 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Bernal",
"Antonio N.",
"",
"Univ. Granada"
],
[
"Sánchez",
"Miguel",
"",
"Univ. Granada"
]
] | The following three geometrical structures on a manifold are studied in detail: (1) Leibnizian: a non-vanishing 1-form $\Omega$ plus a Riemannian metric $\h$ on its annhilator vector bundle. In particular, the possible dimensions of the automorphism group of a Leibnizian G-structure are characterized. (2) Galilean: Lei... |
1502.02861 | Arne Grenzebach | Arne Grenzebach | Aberrational Effects for Shadows of Black Holes | 12 pages, 3 figures; Proceedings of the 524. WE-Heraeus-Seminar held
at the Physikzentrum, Bad Honnef, Germany, 17.--23.2.2013 | null | 10.1007/978-3-319-18335-0_25 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we discuss how the shadow of a Kerr black hole depends on the
motion of the observer. In particular, we derive an analytical formula for the
boundary curve of the shadow for an observer moving with given four-velocity at
given Boyer--Lindquist coordinates. We visualize the shadow for various values
of ... | [
{
"created": "Tue, 10 Feb 2015 11:09:49 GMT",
"version": "v1"
}
] | 2021-04-07 | [
[
"Grenzebach",
"Arne",
""
]
] | In this paper, we discuss how the shadow of a Kerr black hole depends on the motion of the observer. In particular, we derive an analytical formula for the boundary curve of the shadow for an observer moving with given four-velocity at given Boyer--Lindquist coordinates. We visualize the shadow for various values of pa... |
gr-qc/0702040 | Leonardo Gualtieri | L. Gualtieri, J.A. Pons, J.A. Miralles and V. Ferrari | Relativistic r-modes and shear viscosity | 8 pages, 7 figures, to appear in the Proceedings of the Albert
Einstein Century International Conference, Paris, France, July 2005 | AIP Conf.Proc.861:638-645,2006 | 10.1063/1.2399636 | null | gr-qc astro-ph | null | We derive the relativistic equations for stellar perturbations, including in
a consistent way shear viscosity in the stress-energy tensor, and we
numerically integrate our equations in the case of large viscosity. We consider
the slow rotation approximation, and we neglect the coupling between polar and
axial perturb... | [
{
"created": "Wed, 7 Feb 2007 11:07:10 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Gualtieri",
"L.",
""
],
[
"Pons",
"J. A.",
""
],
[
"Miralles",
"J. A.",
""
],
[
"Ferrari",
"V.",
""
]
] | We derive the relativistic equations for stellar perturbations, including in a consistent way shear viscosity in the stress-energy tensor, and we numerically integrate our equations in the case of large viscosity. We consider the slow rotation approximation, and we neglect the coupling between polar and axial perturbat... |
2208.03623 | Hirotaka Takahashi | Yusuke Sakai, Yousuke Itoh, Piljong Jung, Keiko Kokeyama, Chihiro
Kozakai, Katsuko T. Nakahira, Shoichi Oshino, Yutaka Shikano, Hirotaka
Takahashi, Takashi Uchiyama, Gen Ueshima, Tatsuki Washimi, Takahiro Yamamoto,
Takaaki Yokozawa | Training Process of Unsupervised Learning Architecture for Gravity Spy
Dataset | 17 pages, 10 figures, Matches version published in Annalen der Physik | Annalen der Physik, issue 2200140 (2022) | 10.1002/andp.202200140 | JGW-P2213998 | gr-qc stat.ML | http://creativecommons.org/licenses/by/4.0/ | Transient noise appearing in the data from gravitational-wave detectors
frequently causes problems, such as instability of the detectors and
overlapping or mimicking gravitational-wave signals. Because transient noise is
considered to be associated with the environment and instrument, its
classification would help to... | [
{
"created": "Sun, 7 Aug 2022 02:51:36 GMT",
"version": "v1"
}
] | 2022-08-11 | [
[
"Sakai",
"Yusuke",
""
],
[
"Itoh",
"Yousuke",
""
],
[
"Jung",
"Piljong",
""
],
[
"Kokeyama",
"Keiko",
""
],
[
"Kozakai",
"Chihiro",
""
],
[
"Nakahira",
"Katsuko T.",
""
],
[
"Oshino",
"Shoichi",
""
],
[... | Transient noise appearing in the data from gravitational-wave detectors frequently causes problems, such as instability of the detectors and overlapping or mimicking gravitational-wave signals. Because transient noise is considered to be associated with the environment and instrument, its classification would help to u... |
0907.1967 | Jan Steinhoff | Jan Steinhoff and Gerhard Sch\"afer | Canonical formulation of self-gravitating spinning-object systems | 6 pages. v2: extended version; identical to the published one. v3:
corrected misprints in (24) and (39); improved notation; added note regarding
a further reference. | Europhys.Lett.87:50004,2009 | 10.1209/0295-5075/87/50004 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the Arnowitt-Deser-Misner (ADM) canonical formulation of general
relativity, a canonical formulation of gravitationally interacting classical
spinning-object systems is given to linear order in spin. The constructed
position, linear momentum and spin variables fulfill standard Poisson bracket
relations. A sp... | [
{
"created": "Sat, 11 Jul 2009 23:33:37 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Oct 2009 14:41:19 GMT",
"version": "v2"
},
{
"created": "Mon, 19 Apr 2010 12:41:47 GMT",
"version": "v3"
}
] | 2010-04-21 | [
[
"Steinhoff",
"Jan",
""
],
[
"Schäfer",
"Gerhard",
""
]
] | Based on the Arnowitt-Deser-Misner (ADM) canonical formulation of general relativity, a canonical formulation of gravitationally interacting classical spinning-object systems is given to linear order in spin. The constructed position, linear momentum and spin variables fulfill standard Poisson bracket relations. A spat... |
0708.4139 | Sushil Srivastava | S. K. Srivastava and J. Dutta | Non-linear Equation of State, COSMIC Acceleration and Deceleration
During Phantom-Dominance | 23 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here, RS-II model of brane-gravity is considerd for phantom universe using
non-linear equation of stste. Phantom fluid is known to violate the weak energy
condition. In this paper, it is found that this characteristic of phantom
energy is affected drastically by the negative brane-tension $\lambda$ of the
RS-II model... | [
{
"created": "Thu, 30 Aug 2007 12:22:45 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jul 2008 12:08:40 GMT",
"version": "v2"
}
] | 2008-07-14 | [
[
"Srivastava",
"S. K.",
""
],
[
"Dutta",
"J.",
""
]
] | Here, RS-II model of brane-gravity is considerd for phantom universe using non-linear equation of stste. Phantom fluid is known to violate the weak energy condition. In this paper, it is found that this characteristic of phantom energy is affected drastically by the negative brane-tension $\lambda$ of the RS-II model. ... |
0711.2573 | David Burton | D.A. Burton, R.W. Tucker, C.H. Wang | Spinning particles in scalar-tensor gravity | 8 pages Corrected typo in address footnote | Phys.Lett.A372:3141-3144,2008 | 10.1016/j.physleta.2008.01.048 | null | gr-qc | null | We develop a new model of a spinning particle in Brans-Dicke spacetime using
a metric-compatible connection with torsion. The particle's spin vector is
shown to be Fermi-parallel (by the Levi-Civita connection) along its worldline
(an autoparallel of the metric-compatible connection) when neglecting
spin-curvature co... | [
{
"created": "Fri, 16 Nov 2007 09:58:59 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Nov 2007 15:40:53 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Burton",
"D. A.",
""
],
[
"Tucker",
"R. W.",
""
],
[
"Wang",
"C. H.",
""
]
] | We develop a new model of a spinning particle in Brans-Dicke spacetime using a metric-compatible connection with torsion. The particle's spin vector is shown to be Fermi-parallel (by the Levi-Civita connection) along its worldline (an autoparallel of the metric-compatible connection) when neglecting spin-curvature coup... |
1601.07037 | Keith Andrew | Keith Andrew, Eric Steinfelds, Nick Zolman | The Mattig Expression for a d-dimensional Gauss Bonnet FRWL Cosmology | 15 pages | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here we study the form of the Mattig equation applied in a cosmological
setting for spacetime metric gravity models described by the Gauss-Bonnet
action. We start with expressing the Mattig relation for cosmological
magnitudes in terms of standard metric functions and redshift values. Then we
present the Gauss-Bonnet... | [
{
"created": "Sat, 23 Jan 2016 02:04:24 GMT",
"version": "v1"
}
] | 2016-01-27 | [
[
"Andrew",
"Keith",
""
],
[
"Steinfelds",
"Eric",
""
],
[
"Zolman",
"Nick",
""
]
] | Here we study the form of the Mattig equation applied in a cosmological setting for spacetime metric gravity models described by the Gauss-Bonnet action. We start with expressing the Mattig relation for cosmological magnitudes in terms of standard metric functions and redshift values. Then we present the Gauss-Bonnet f... |
gr-qc/0609026 | Tarun Souradeep | Tarun Souradeep (IUCAA) | Spectroscopy of Cosmic topology | 8 pages, 3 figures; Invited contribution to a special issue of IJP in
memory of Prof. A.K. Raychaudhuri | Indian J.Phys. 80 (2006) 1063-1069 | null | IUCAA-43/06 | gr-qc astro-ph hep-th | null | Einstein's theory of gravitation that governs the geometry of space-time,
coupled with spectacular advance in cosmological observations, promises to
deliver a `standard model' of cosmology in the near future. However, local
geometry of space constrains, but does not dictate the topology of the cosmos.
hence, Cosmic t... | [
{
"created": "Thu, 7 Sep 2006 12:23:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Souradeep",
"Tarun",
"",
"IUCAA"
]
] | Einstein's theory of gravitation that governs the geometry of space-time, coupled with spectacular advance in cosmological observations, promises to deliver a `standard model' of cosmology in the near future. However, local geometry of space constrains, but does not dictate the topology of the cosmos. hence, Cosmic top... |
gr-qc/0606086 | M Blagojevic | M. Blagojevic and B. Cvetkovic | Black hole entropy from the boundary conformal structure in 3D gravity
with torsion | LaTeX, 12 pages; v2: one appendix added, typos corrected, minor
changes of the text | JHEP 0610 (2006) 005 | 10.1088/1126-6708/2006/10/005 | null | gr-qc hep-th | null | Asymptotic symmetry of the Euclidean 3D gravity with torsion is described by
two independent Virasoro algebras with different central charges. Elements of
this boundary conformal structure are combined with Cardy's formula to
calculate the black hole entropy.
| [
{
"created": "Tue, 20 Jun 2006 15:39:14 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Sep 2006 09:25:57 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Blagojevic",
"M.",
""
],
[
"Cvetkovic",
"B.",
""
]
] | Asymptotic symmetry of the Euclidean 3D gravity with torsion is described by two independent Virasoro algebras with different central charges. Elements of this boundary conformal structure are combined with Cardy's formula to calculate the black hole entropy. |
2112.04647 | Alexander Simpson | Alex Simpson and Matt Visser | Astrophysically viable Kerr-like spacetime -- into the eye of the storm | V1: 5 pages, 18 references | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse a rotating regular black hole with asymptotically Minkowski core.
This Kerr-like geometry possesses the full "Killing tower" of nontrivial
Killing tensor, Killing-Yano tensor, and principal tensor. The Hamilton-Jacobi
equation, the Klein-Gordon equation, and Maxwell's equations are separable.
Energy-condit... | [
{
"created": "Thu, 9 Dec 2021 01:31:45 GMT",
"version": "v1"
}
] | 2021-12-10 | [
[
"Simpson",
"Alex",
""
],
[
"Visser",
"Matt",
""
]
] | We analyse a rotating regular black hole with asymptotically Minkowski core. This Kerr-like geometry possesses the full "Killing tower" of nontrivial Killing tensor, Killing-Yano tensor, and principal tensor. The Hamilton-Jacobi equation, the Klein-Gordon equation, and Maxwell's equations are separable. Energy-conditio... |
1805.04447 | Julia Tchemarina | P V Kratovitch, I M Potashov, Ju V Tchemarina and A N Tsirulev | Topological geons with self-gravitating phantom scalar field | 5 pages, presented at the 3rd International Conference on Particle
Physics and Astrophysics (ICPPA 2017) | IOP Conf. Series: Journal of Physics: Conf. Series 934 (2017)
012047 | 10.1088/1742-6596/934/1/012047 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A topological geon is the quotient manifold $M/Z_2$ where $M$ is a static
spherically symmetric wormhole having the reflection symmetry with respect to
its throat. We distinguish such asymptotically flat solutions of the Einstein
equations according to the form of the time-time metric function by using the
quadrature... | [
{
"created": "Fri, 11 May 2018 15:27:16 GMT",
"version": "v1"
}
] | 2018-05-14 | [
[
"Kratovitch",
"P V",
""
],
[
"Potashov",
"I M",
""
],
[
"Tchemarina",
"Ju V",
""
],
[
"Tsirulev",
"A N",
""
]
] | A topological geon is the quotient manifold $M/Z_2$ where $M$ is a static spherically symmetric wormhole having the reflection symmetry with respect to its throat. We distinguish such asymptotically flat solutions of the Einstein equations according to the form of the time-time metric function by using the quadrature f... |
1002.3588 | Mubasher Jamil | H. Mohseni Sadjadi and Mubasher Jamil | Generalized second law of thermodynamics for FRW cosmology with
logarithmic correction | 14 pages, accepted for publication in Europhysics Letters | EPL, 92 (2010) 69001 | 10.1209/0295-5075/92/69001 | arXiv:1002.3588v2 [gr-qc] | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the previous analyses in the literature about the generalized second law
(GSL) in an accelerated expanding universe the usual area relation for the
entropy, i.e. $S={A\over 4G}$, was used for the cosmological horizon entropy.
But this entropy relation may be modified due to thermal and quantum
fluctuations or corr... | [
{
"created": "Thu, 18 Feb 2010 18:12:26 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Dec 2010 04:18:34 GMT",
"version": "v2"
}
] | 2011-01-14 | [
[
"Sadjadi",
"H. Mohseni",
""
],
[
"Jamil",
"Mubasher",
""
]
] | In the previous analyses in the literature about the generalized second law (GSL) in an accelerated expanding universe the usual area relation for the entropy, i.e. $S={A\over 4G}$, was used for the cosmological horizon entropy. But this entropy relation may be modified due to thermal and quantum fluctuations or correc... |
gr-qc/0312028 | Monica Varvella | M. Arnaud-Varvella, M.-C. Angonin, Ph. Tourrenc | Increase of the Number of Detectable Gravitational Waves Signals due to
Gravitational Lensing | Accepted for publication in General Relativity and Gravitation | Gen.Rel.Grav. 36 (2004) 983-999 | 10.1023/B:GERG.0000018085.46454.ff | null | gr-qc astro-ph | null | This article deals with the gravitational lensing (GL) of gravitational waves
(GW). We compute the increase in the number of detected GW events due to GL.
First, we check that geometrical optics is valid for the GW frequency range on
which Earth-based detectors are sensitive, and that this is also partially true
for ... | [
{
"created": "Thu, 4 Dec 2003 12:38:15 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Arnaud-Varvella",
"M.",
""
],
[
"Angonin",
"M. -C.",
""
],
[
"Tourrenc",
"Ph.",
""
]
] | This article deals with the gravitational lensing (GL) of gravitational waves (GW). We compute the increase in the number of detected GW events due to GL. First, we check that geometrical optics is valid for the GW frequency range on which Earth-based detectors are sensitive, and that this is also partially true for wh... |
1112.2785 | Li-Fang Li | Li-Fang Li, Rong-Gen Cai, Zong-Kuan Guo, and Bin Hu | Non-Gaussian features from the inverse volume corrections in loop
quantum cosmology | matched to the published version. 30 pages, 4 figures | Phys. Rev. D 86, 044020 (2012) | 10.1103/PhysRevD.86.044020 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the non-Gaussian features of the primordial
fluctuations in loop quantum cosmology with the inverse volume corrections. The
detailed analysis is performed in the single field slow-roll inflationary
models. However, our results reflect the universal characteristics of
bispectrum in loop quantum ... | [
{
"created": "Tue, 13 Dec 2011 03:36:15 GMT",
"version": "v1"
},
{
"created": "Sun, 23 Sep 2012 11:08:45 GMT",
"version": "v2"
}
] | 2012-09-25 | [
[
"Li",
"Li-Fang",
""
],
[
"Cai",
"Rong-Gen",
""
],
[
"Guo",
"Zong-Kuan",
""
],
[
"Hu",
"Bin",
""
]
] | In this paper we study the non-Gaussian features of the primordial fluctuations in loop quantum cosmology with the inverse volume corrections. The detailed analysis is performed in the single field slow-roll inflationary models. However, our results reflect the universal characteristics of bispectrum in loop quantum co... |
0901.0978 | T. P. Singh | T. P. Singh | Quantum theory, noncommutative gravity, and the cosmological constant
problem | 10 pages. One paragraph each added at the end of Section 4 and
Section 7. Version matches published version | Advances in Astronomy 2009 (2009) 632064 | 10.1155/2009/632064 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmological constant problem is principally concerned with trying to
understand how the zero-point energy of quantum fields contributes to gravity.
Here we take the approach that by addressing a fundamental unresolved issue in
quantum theory we can gain a better understanding of the problem. Our starting
point i... | [
{
"created": "Thu, 8 Jan 2009 06:28:52 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Nov 2009 16:30:18 GMT",
"version": "v2"
}
] | 2009-11-30 | [
[
"Singh",
"T. P.",
""
]
] | The cosmological constant problem is principally concerned with trying to understand how the zero-point energy of quantum fields contributes to gravity. Here we take the approach that by addressing a fundamental unresolved issue in quantum theory we can gain a better understanding of the problem. Our starting point is ... |
1708.04003 | Ken-Ichi Nakao | Ken-ichi Nakao, Hirotada Okawa and Kei-ichi Maeda | Non-linear collisional Penrose process: How large energy can a black
hole release? | 24 pages, 3 figures | null | null | OCU-PHYS-469, AP-GR-141 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Energy extraction from a rotating or charged black hole is one of fascinating
issues in general relativity. The collisional Penrose process is one of such
extraction mechanisms and has been reconsidered intensively since Banados, Silk
and West pointed out the physical importance of very high energy collisions
around ... | [
{
"created": "Mon, 14 Aug 2017 04:13:44 GMT",
"version": "v1"
}
] | 2017-08-15 | [
[
"Nakao",
"Ken-ichi",
""
],
[
"Okawa",
"Hirotada",
""
],
[
"Maeda",
"Kei-ichi",
""
]
] | Energy extraction from a rotating or charged black hole is one of fascinating issues in general relativity. The collisional Penrose process is one of such extraction mechanisms and has been reconsidered intensively since Banados, Silk and West pointed out the physical importance of very high energy collisions around a ... |
2110.01814 | Matt Visser | Joshua Baines, Thomas Berry, Alex Simpson, and Matt Visser | Killing tensor and Carter constant for Painleve-Gullstrand form of
Lense-Thirring spacetime | V1: 17 pages, no figures; V2: some added comments/clarifications, 1
added reference, no physics changes | Universe 7 (2021) 473 | 10.3390/universe7120473 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, the authors have formulated and explored a novel
Painleve-Gullstrand variant of the Lense-Thirring spacetime, which has some
particularly elegant features -- including unit-lapse, intrinsically flat
spatial 3-slices, and some particularly simple geodesics, the "rain" geodesics.
At linear level in the rotati... | [
{
"created": "Tue, 5 Oct 2021 04:23:14 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Oct 2021 05:41:36 GMT",
"version": "v2"
}
] | 2022-01-05 | [
[
"Baines",
"Joshua",
""
],
[
"Berry",
"Thomas",
""
],
[
"Simpson",
"Alex",
""
],
[
"Visser",
"Matt",
""
]
] | Recently, the authors have formulated and explored a novel Painleve-Gullstrand variant of the Lense-Thirring spacetime, which has some particularly elegant features -- including unit-lapse, intrinsically flat spatial 3-slices, and some particularly simple geodesics, the "rain" geodesics. At linear level in the rotation... |
gr-qc/9909041 | Janna Levin | Janna Levin and John D. Barrow | Fractals and Scars on a Compact Octagon | 6 pages, 3 figs, LaTeX file | Class.Quant.Grav.17:L61-L68,2000 | 10.1088/0264-9381/17/6/101 | null | gr-qc astro-ph chao-dyn nlin.CD | null | A finite universe naturally supports chaotic classical motion. An ordered
fractal emerges from the chaotic dynamics which we characterize in full for a
compact 2-dimensional octagon. In the classical to quantum transition, the
underlying fractal can persist in the form of scars, ridges of enhanced
amplitude in the se... | [
{
"created": "Tue, 14 Sep 1999 12:30:57 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Levin",
"Janna",
""
],
[
"Barrow",
"John D.",
""
]
] | A finite universe naturally supports chaotic classical motion. An ordered fractal emerges from the chaotic dynamics which we characterize in full for a compact 2-dimensional octagon. In the classical to quantum transition, the underlying fractal can persist in the form of scars, ridges of enhanced amplitude in the semi... |
0908.0444 | Mubasher Jamil | Mubasher Jamil and Asghar Qadir | Primordial Black Holes in Phantom Cosmology | 17 pages, 10 figures, accepted for publication in Gen. Relativ.
Gravit | Gen.Rel.Grav.43:1069-1082,2011 | 10.1007/s10714-010-0928-1 | arXiv:0908.0444v3 [gr-qc] | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the effects of accretion of phantom energy onto primordial
black holes. Since Hawking radiation and phantom energy accretion contribute to
a {\it decrease} of the mass of the black hole, the primordial black hole that
would be expected to decay now due to the Hawking process would decay {\it
earlier} d... | [
{
"created": "Tue, 4 Aug 2009 13:39:21 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Aug 2009 18:09:09 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Dec 2009 05:03:21 GMT",
"version": "v3"
}
] | 2011-03-28 | [
[
"Jamil",
"Mubasher",
""
],
[
"Qadir",
"Asghar",
""
]
] | We investigate the effects of accretion of phantom energy onto primordial black holes. Since Hawking radiation and phantom energy accretion contribute to a {\it decrease} of the mass of the black hole, the primordial black hole that would be expected to decay now due to the Hawking process would decay {\it earlier} due... |
2401.13374 | Vittorio De Falco Dr | Vittorio De Falco, Emmanuele Battista, Davide Usseglio, Salvatore
Capozziello | Radiative losses and radiation-reaction effects at the first
post-Newtonian order in Einstein-Cartan theory | 19 pages, 3 figures, 1 table; accepted for publication on EPJ C | null | 10.1140/epjc/s10052-024-12476-4 | null | gr-qc astro-ph.HE hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | Gravitational radiation-reaction phenomena occurring in the dynamics of
inspiralling compact binary systems are investigated at the first
post-Newtonian order beyond the quadrupole approximation in the context of
Einstein-Cartan theory, where quantum spin effects are modeled via the
Weyssenhoff fluid. We exploit bala... | [
{
"created": "Wed, 24 Jan 2024 11:08:01 GMT",
"version": "v1"
}
] | 2024-02-09 | [
[
"De Falco",
"Vittorio",
""
],
[
"Battista",
"Emmanuele",
""
],
[
"Usseglio",
"Davide",
""
],
[
"Capozziello",
"Salvatore",
""
]
] | Gravitational radiation-reaction phenomena occurring in the dynamics of inspiralling compact binary systems are investigated at the first post-Newtonian order beyond the quadrupole approximation in the context of Einstein-Cartan theory, where quantum spin effects are modeled via the Weyssenhoff fluid. We exploit balanc... |
2004.07613 | Ivan Kolar | Ivan Kolar, Anupam Mazumdar | NUT charge in linearized infinite derivative gravity | 10 pages, 4 figures | Phys. Rev. D 101, 124005 (2020) | 10.1103/PhysRevD.101.124005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the gravitational field of the NUT-like source in the linearized
(ghost-free) infinite derivative gravity. Such a source is equivalent to the
spinning semi-infinite cosmic string with no tension. In general relativity,
the linearized (massless) Taub-NUT solution has a curvature singularity as well
as a topol... | [
{
"created": "Thu, 16 Apr 2020 11:50:02 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Apr 2020 15:35:37 GMT",
"version": "v2"
},
{
"created": "Fri, 29 May 2020 08:37:53 GMT",
"version": "v3"
}
] | 2020-06-04 | [
[
"Kolar",
"Ivan",
""
],
[
"Mazumdar",
"Anupam",
""
]
] | We study the gravitational field of the NUT-like source in the linearized (ghost-free) infinite derivative gravity. Such a source is equivalent to the spinning semi-infinite cosmic string with no tension. In general relativity, the linearized (massless) Taub-NUT solution has a curvature singularity as well as a topolog... |
1509.07021 | Lorenzo Sebastiani | Shynaray Myrzakul, Ratbay Myrzakulov and Lorenzo Sebastiani | $f(\phi) R$-models for inflation | 9 pages, revised version, accepted in IJMPD | null | 10.1142/S0218271816500413 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate models where a scalar field driving inflation
is minimally coupled with gravity and it is subjected to a scalar potential. We
present several examples of coupling between the field and gravity, and we
furnish realistic models for inflation in agreement with the last Planck
results.
| [
{
"created": "Tue, 22 Sep 2015 12:02:25 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Dec 2015 12:16:46 GMT",
"version": "v2"
}
] | 2016-03-01 | [
[
"Myrzakul",
"Shynaray",
""
],
[
"Myrzakulov",
"Ratbay",
""
],
[
"Sebastiani",
"Lorenzo",
""
]
] | In this paper, we investigate models where a scalar field driving inflation is minimally coupled with gravity and it is subjected to a scalar potential. We present several examples of coupling between the field and gravity, and we furnish realistic models for inflation in agreement with the last Planck results. |
2310.03811 | Costantino Pacilio | Costantino Pacilio, Davide Gerosa, Swetha Bhagwat | Catalog variance of testing general relativity with gravitational-wave
data | 6 pages, 2 figures; v2: matches published version | Physical Review D 109.8, L081302 (2024) | 10.1103/PhysRevD.109.L081302 | null | gr-qc astro-ph.HE hep-ph physics.data-an | http://creativecommons.org/licenses/by/4.0/ | Combining multiple gravitational-wave observations allows for stringent tests
of general relativity, targeting effects that would otherwise be undetectable
using single-event analyses. We highlight how the finite size of the observed
catalog induces a significant source of variance. If not appropriately
accounted for... | [
{
"created": "Thu, 5 Oct 2023 18:01:01 GMT",
"version": "v1"
},
{
"created": "Tue, 7 May 2024 10:48:52 GMT",
"version": "v2"
}
] | 2024-05-08 | [
[
"Pacilio",
"Costantino",
""
],
[
"Gerosa",
"Davide",
""
],
[
"Bhagwat",
"Swetha",
""
]
] | Combining multiple gravitational-wave observations allows for stringent tests of general relativity, targeting effects that would otherwise be undetectable using single-event analyses. We highlight how the finite size of the observed catalog induces a significant source of variance. If not appropriately accounted for, ... |
gr-qc/9710100 | Frank Antonsen | Frank Antonsen | The Heat-Kernel in a Schwarzschild Geometry and the Casimir Energy | LaTeX2e (minor errors corrected, discussion extended and a few new
results added) | null | null | null | gr-qc hep-th quant-ph | null | We obtain an hybrid expression for the heat-kernel, and from that the density
of the free energy, for a minimally coupled scalar field in a Schwarzschild
geometry at finite temperature. This gives us the zero-point energy density as
a function of the distance from the massive object generating the gravitational
field... | [
{
"created": "Tue, 21 Oct 1997 14:00:39 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Jan 1998 11:45:23 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Antonsen",
"Frank",
""
]
] | We obtain an hybrid expression for the heat-kernel, and from that the density of the free energy, for a minimally coupled scalar field in a Schwarzschild geometry at finite temperature. This gives us the zero-point energy density as a function of the distance from the massive object generating the gravitational field. ... |
1612.00760 | Suddhasattwa Brahma | Pietro Dona and Antonino Marciano | Non Bunch Davies group coherent states, and their quantum signatures in
CMB observables | 17 pages | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We approach the problem of finding generalized states for matter fields in a
de Sitter universe, moving from a group theoretical point of view. This has
profound consequences for cosmological perturbations during inflation, and for
other CMB observables. In a systematic derivation, we find all the allowed
generalitie... | [
{
"created": "Fri, 2 Dec 2016 17:21:36 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Apr 2017 10:16:29 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Jul 2020 01:08:56 GMT",
"version": "v3"
}
] | 2020-07-06 | [
[
"Dona",
"Pietro",
""
],
[
"Marciano",
"Antonino",
""
]
] | We approach the problem of finding generalized states for matter fields in a de Sitter universe, moving from a group theoretical point of view. This has profound consequences for cosmological perturbations during inflation, and for other CMB observables. In a systematic derivation, we find all the allowed generalities ... |
0710.1411 | Nosrat-ollah Jafari Sonbolabadi | Ahmad Shariati, Nosratollah Jafari | MOND, dark matter, and conservation of energy | 4 pages, LaTeX | null | null | null | gr-qc astro-ph hep-th | null | The MOND equation $m \vec a \mu(a) = \vec F$ could be transformed to the
equivalent form $m \vec a = \vec{F'}$, where $\Vec{F'}$ is a transformed force.
Using this transformation we argue that MOND could not avoid introducing dark
matter, and introduces nonconservative terms to the equations of motion.
| [
{
"created": "Sun, 7 Oct 2007 11:12:31 GMT",
"version": "v1"
}
] | 2007-10-14 | [
[
"Shariati",
"Ahmad",
""
],
[
"Jafari",
"Nosratollah",
""
]
] | The MOND equation $m \vec a \mu(a) = \vec F$ could be transformed to the equivalent form $m \vec a = \vec{F'}$, where $\Vec{F'}$ is a transformed force. Using this transformation we argue that MOND could not avoid introducing dark matter, and introduces nonconservative terms to the equations of motion. |
2205.07538 | Chao Niu | Wei Xiong, Peng Liu, Chao Niu, Cheng-Yong Zhang, and Bin Wang | Dynamical spontaneous scalarization in Einstein-Maxwell-scalar theory | 17 pages, 17 figures, the version accepted by CPC | null | 10.1088/1674-1137/ac70ad | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the linear instability and the nonlinear dynamical evolution of the
Reissner-Nordstr\"om (RN) black hole in the Einstein-Maxwell-scalar theory in
asymptotic flat spacetime. We focus on the coupling function
$f(\phi)=e^{-b\phi^2}$ which allows both the scalar-free RN solution and
scalarized black hole solutio... | [
{
"created": "Mon, 16 May 2022 09:34:28 GMT",
"version": "v1"
}
] | 2022-09-14 | [
[
"Xiong",
"Wei",
""
],
[
"Liu",
"Peng",
""
],
[
"Niu",
"Chao",
""
],
[
"Zhang",
"Cheng-Yong",
""
],
[
"Wang",
"Bin",
""
]
] | We study the linear instability and the nonlinear dynamical evolution of the Reissner-Nordstr\"om (RN) black hole in the Einstein-Maxwell-scalar theory in asymptotic flat spacetime. We focus on the coupling function $f(\phi)=e^{-b\phi^2}$ which allows both the scalar-free RN solution and scalarized black hole solution.... |
gr-qc/0504134 | Stuart Reid Mr | S. Reid, G. Cagnoli, D.R.M. Crooks, J. Hough, P. Murray, S. Rowan,
M.M. Fejer, R. Route, S. Zappe | Mechanical Dissipation in Silicon Flexures | 7 pages. Accepted by Phys Lett A, submitted for publication on 28
October 2005 | eConf C041213 (2004) 1222; Phys.Lett. A351 (2006) 205-211 | 10.1016/j.physleta.2005.10.103 | null | gr-qc | null | The thermo-mechanical properties of silicon make it of significant interest
as a possible material for mirror substrates and suspension elements for future
long-baseline gravitational wave detectors. The mechanical dissipation in 92um
thick <110> single-crystal silicon cantilevers has been observed over the
temperatu... | [
{
"created": "Wed, 27 Apr 2005 09:09:58 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Oct 2005 12:16:42 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Reid",
"S.",
""
],
[
"Cagnoli",
"G.",
""
],
[
"Crooks",
"D. R. M.",
""
],
[
"Hough",
"J.",
""
],
[
"Murray",
"P.",
""
],
[
"Rowan",
"S.",
""
],
[
"Fejer",
"M. M.",
""
],
[
"Route",
"R.",
""... | The thermo-mechanical properties of silicon make it of significant interest as a possible material for mirror substrates and suspension elements for future long-baseline gravitational wave detectors. The mechanical dissipation in 92um thick <110> single-crystal silicon cantilevers has been observed over the temperature... |
2312.01136 | P. Vaishak | Vaishak Prasad | The Shear at the Common Dynamical Horizon in Binary Black Hole Mergers
and its Imprint in their Gravitational Radiation | 8 pages, 3 Figures and 4 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the correlation between a part of the gravitational field at the
common dynamical horizon in the strong field regime and the news of the
gravitational radiation received from the system in the weak field regime, in
the post-merger phase of quasi-circular, non-spinning binary black hole mergers
using numerica... | [
{
"created": "Sat, 2 Dec 2023 13:35:10 GMT",
"version": "v1"
}
] | 2023-12-05 | [
[
"Prasad",
"Vaishak",
""
]
] | We study the correlation between a part of the gravitational field at the common dynamical horizon in the strong field regime and the news of the gravitational radiation received from the system in the weak field regime, in the post-merger phase of quasi-circular, non-spinning binary black hole mergers using numerical ... |
gr-qc/0002062 | Filipe Mena | Filipe C. Mena (QMW, London), Reza Tavakol (QMW, London) and Pankaj S.
Joshi (Tata Institute, Bombay) | Initial data and spherical dust collapse | 10 pages, 1 figure, accepted for publication in Physical Review D | Phys.Rev. D62 (2000) 044001 | 10.1103/PhysRevD.62.044001 | null | gr-qc | null | By considering families of radial null geodesics, we study the subsets of
initial data that lead to naked singularities and black holes in inhomogeneous
spherical dust collapse. We introduce the notion of central homogeneity for
spherical dust collapse and prove that for the occurrence of naked
singularities, the ini... | [
{
"created": "Thu, 17 Feb 2000 15:13:11 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Mena",
"Filipe C.",
"",
"QMW, London"
],
[
"Tavakol",
"Reza",
"",
"QMW, London"
],
[
"Joshi",
"Pankaj S.",
"",
"Tata Institute, Bombay"
]
] | By considering families of radial null geodesics, we study the subsets of initial data that lead to naked singularities and black holes in inhomogeneous spherical dust collapse. We introduce the notion of central homogeneity for spherical dust collapse and prove that for the occurrence of naked singularities, the initi... |
2205.02603 | Bijan Saha Dr. | Bijan Saha | Time-dependent Spinor field in a static cylindrically-symmetric
space-time | 9 pages, 8 figures | Eur. Phys. J. Plus (2022) 137:1063 | 10.1140/epjp/s13360-022-03275-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the scope of a static cylindrically symmetric space-time we study the
behavior of a nonlinear spinor field that depends on time and radial
coordinates. It is found that the presence of nontrivial non-diagonal
components of the energy-momentum tensor (EMT) imposes some restriction on both
the metric functions a... | [
{
"created": "Thu, 5 May 2022 12:33:00 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Sep 2022 12:01:45 GMT",
"version": "v2"
}
] | 2022-09-21 | [
[
"Saha",
"Bijan",
""
]
] | Within the scope of a static cylindrically symmetric space-time we study the behavior of a nonlinear spinor field that depends on time and radial coordinates. It is found that the presence of nontrivial non-diagonal components of the energy-momentum tensor (EMT) imposes some restriction on both the metric functions and... |
gr-qc/9506062 | null | Giampiero Esposito and Alexander Yu. Kamenshchik | Coulomb Gauge in One-Loop Quantum Cosmology | 13 pages, plain-tex, recently appearing in Physics Letters B, volume
336, pages 324-329, September 1994. The authors apologize for the delay in
circulating the paper, due to technical problems now fixed | Phys.Lett. B336 (1994) 324-329 | 10.1016/0370-2693(94)90540-1 | null | gr-qc | null | The well-known discrepancies between covariant and non-covariant formalisms
in quantum field theory and quantum cosmology are analyzed by focusing on the
Coulomb gauge for vacuum Maxwell theory. On studying a flat Euclidean
background with boundaries, the corresponding mode-by-mode analysis of one-loop
quantum amplit... | [
{
"created": "Tue, 27 Jun 1995 17:59:14 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Esposito",
"Giampiero",
""
],
[
"Kamenshchik",
"Alexander Yu.",
""
]
] | The well-known discrepancies between covariant and non-covariant formalisms in quantum field theory and quantum cosmology are analyzed by focusing on the Coulomb gauge for vacuum Maxwell theory. On studying a flat Euclidean background with boundaries, the corresponding mode-by-mode analysis of one-loop quantum amplitud... |
2308.14823 | Hector O. Silva | Hector O. Silva, Giovanni Tambalo, Kostas Glampedakis, Kent Yagi | Gravitational radiation from a particle plunging into a Schwarzschild
black hole: frequency-domain and semirelativistic analyses | 16 pages, 10 figures. v2. Matches published version | null | 10.1103/PhysRevD.109.024036 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We revisit the classic problem of gravitational wave emission by a test
particle plunging into a Schwarzschild black hole both in the frequency-domain
Regge-Wheeler-Zerilli formalism and in the semirelativistic approximation. We
use, and generalize, a transformation due to Nakamura, Sasaki, and Shibata to
improve the... | [
{
"created": "Mon, 28 Aug 2023 18:20:50 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jan 2024 13:00:46 GMT",
"version": "v2"
}
] | 2024-01-26 | [
[
"Silva",
"Hector O.",
""
],
[
"Tambalo",
"Giovanni",
""
],
[
"Glampedakis",
"Kostas",
""
],
[
"Yagi",
"Kent",
""
]
] | We revisit the classic problem of gravitational wave emission by a test particle plunging into a Schwarzschild black hole both in the frequency-domain Regge-Wheeler-Zerilli formalism and in the semirelativistic approximation. We use, and generalize, a transformation due to Nakamura, Sasaki, and Shibata to improve the f... |
2107.01421 | Burkhard Kleihaus | Efthimia Deligianni, Burkhard Kleihaus, Jutta Kunz, Petya Nedkova,
Stoytcho Yazadjiev | Quasi-periodic Oscillations in Rotating Ellis Wormhole Spacetimes | 21 pages, 16 figures | Phys. Rev. D 104, 064043 (2021) | 10.1103/PhysRevD.104.064043 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the properties of the circular orbits for massive particles in the
equatorial plane of symmetric rotating Ellis wormholes. In particular, we
obtain the orbital frequencies and the radial and vertical epicyclic
frequencies, and consider their lowest parametric, forced and Keplerian
resonances. These show th... | [
{
"created": "Sat, 3 Jul 2021 12:30:47 GMT",
"version": "v1"
}
] | 2021-09-22 | [
[
"Deligianni",
"Efthimia",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Nedkova",
"Petya",
""
],
[
"Yazadjiev",
"Stoytcho",
""
]
] | We analyze the properties of the circular orbits for massive particles in the equatorial plane of symmetric rotating Ellis wormholes. In particular, we obtain the orbital frequencies and the radial and vertical epicyclic frequencies, and consider their lowest parametric, forced and Keplerian resonances. These show that... |
gr-qc/0104057 | Carlo Rovelli | Louis Crane, Alejandro Perez, Carlo Rovelli | A finiteness proof for the Lorentzian state sum spinfoam model for
quantum general relativity | 11 pages, 3 pictures | null | null | null | gr-qc | null | We show that the normalized Lorentzian state sum is finite on any
triangulation. It thus provides a candidate for a perturbatively finite quantum
theory of general relativity in four dimensions with Lorentzian signature.
| [
{
"created": "Wed, 18 Apr 2001 10:19:30 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Crane",
"Louis",
""
],
[
"Perez",
"Alejandro",
""
],
[
"Rovelli",
"Carlo",
""
]
] | We show that the normalized Lorentzian state sum is finite on any triangulation. It thus provides a candidate for a perturbatively finite quantum theory of general relativity in four dimensions with Lorentzian signature. |
1603.04469 | Sam Dolan Dr | Jake O Shipley and Sam R Dolan | Binary black hole shadows, chaotic scattering and the Cantor set | 38 pages, 21 figures. Minor improvements. Added Fig. 8 and Appendix B | Class.Quant.Grav. 33 (2016) no.17, 175001 | 10.1088/0264-9381/33/17/175001 | null | gr-qc astro-ph.GA nlin.CD | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the qualitative features of binary black hole shadows using
the model of two extremally charged black holes in static equilibrium (a
Majumdar--Papapetrou solution). Our perspective is that binary spacetimes are
natural exemplars of chaotic scattering, because they admit more than one
fundamental null o... | [
{
"created": "Mon, 14 Mar 2016 21:00:04 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Mar 2016 14:19:43 GMT",
"version": "v2"
},
{
"created": "Thu, 9 Jun 2016 15:17:12 GMT",
"version": "v3"
}
] | 2016-08-09 | [
[
"Shipley",
"Jake O",
""
],
[
"Dolan",
"Sam R",
""
]
] | We investigate the qualitative features of binary black hole shadows using the model of two extremally charged black holes in static equilibrium (a Majumdar--Papapetrou solution). Our perspective is that binary spacetimes are natural exemplars of chaotic scattering, because they admit more than one fundamental null orb... |
1111.4702 | Bahram Mashhoon | C. Chicone and B. Mashhoon | Nonlocal Gravity: Modified Poisson's Equation | 27 pages, 4 figures; v2: minor improvements, accepted for publication
in J. Math. Phys | J.Math.Phys.53:042501,2012 | 10.1063/1.3702449 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent nonlocal generalization of Einstein's theory of gravitation
reduces in the Newtonian regime to a nonlocal and nonlinear modification of
Poisson's equation of Newtonian gravity. The nonlocally modified Poisson
equation implies that nonlocality can simulate dark matter. Observational data
regarding dark matt... | [
{
"created": "Sun, 20 Nov 2011 23:36:44 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Apr 2012 17:29:11 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Chicone",
"C.",
""
],
[
"Mashhoon",
"B.",
""
]
] | The recent nonlocal generalization of Einstein's theory of gravitation reduces in the Newtonian regime to a nonlocal and nonlinear modification of Poisson's equation of Newtonian gravity. The nonlocally modified Poisson equation implies that nonlocality can simulate dark matter. Observational data regarding dark matter... |
gr-qc/9908001 | Clovis Jacinto de Matos | Clovis J. de Matos and Robert E. Becker | Gravitomagnetic Flux Quantization in superconductors and a Method for
the Experimental Detection of Gravitomagnetism in the Terrestrial Laboratory | 36 pages, 3 figures. This article does not reflect the position of
any official instituion. The ideas exposed still evolving | null | null | null | gr-qc | null | It is extraordinarely difficult to detect the extremely weak gravitomagnetic
(GM) field of even as large a body as the earth. To detect the GM field, the
gravitational analog of an ordinary magnetic field, in a modest terrestrial
laboratory should be that much more difficult. Here we show, however, that for
certain s... | [
{
"created": "Sat, 31 Jul 1999 00:25:01 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Matos",
"Clovis J.",
""
],
[
"Becker",
"Robert E.",
""
]
] | It is extraordinarely difficult to detect the extremely weak gravitomagnetic (GM) field of even as large a body as the earth. To detect the GM field, the gravitational analog of an ordinary magnetic field, in a modest terrestrial laboratory should be that much more difficult. Here we show, however, that for certain sup... |
0710.2014 | Francesco Belgiorno | F. Belgiorno and S. L. Cacciatori | Quantum Effects for the Dirac Field in Reissner-Nordstrom-AdS Black Hole
Background | 18 pages, 5 figures, Iop style | Class.Quant.Grav.25:105013,2008 | 10.1088/0264-9381/25/10/105013 | null | gr-qc | null | The behavior of a charged massive Dirac field on a Reissner-Nordstrom-AdS
black hole background is investigated. The essential self-adjointness of the
Dirac Hamiltonian is studied. Then, an analysis of the discharge problem is
carried out in analogy with the standard Reissner-Nordstrom black hole case.
| [
{
"created": "Wed, 10 Oct 2007 13:59:44 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Belgiorno",
"F.",
""
],
[
"Cacciatori",
"S. L.",
""
]
] | The behavior of a charged massive Dirac field on a Reissner-Nordstrom-AdS black hole background is investigated. The essential self-adjointness of the Dirac Hamiltonian is studied. Then, an analysis of the discharge problem is carried out in analogy with the standard Reissner-Nordstrom black hole case. |
gr-qc/0504010 | Andrew Randono | Andrew Randono | A Generalization of the Kodama State for Arbitrary Values of the Immirzi
Parameter | 16 pages | null | null | null | gr-qc | null | The Kodama State for Lorentzian gravity presupposes a particular value for
the Immirzi-parameter, namely $\beta=-i$. However, the derivation of black hole
entropy in Loop Quantum Gravity suggests that the Immirzi parameter is a fixed
value whose magnitude is on the order of unity but larger than one. Since the
Kodama... | [
{
"created": "Sat, 2 Apr 2005 23:48:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Randono",
"Andrew",
""
]
] | The Kodama State for Lorentzian gravity presupposes a particular value for the Immirzi-parameter, namely $\beta=-i$. However, the derivation of black hole entropy in Loop Quantum Gravity suggests that the Immirzi parameter is a fixed value whose magnitude is on the order of unity but larger than one. Since the Kodama s... |
1408.2415 | Abraao Capistrano | A.J.S Capistrano | Smooth deformations and cosmic statefinders | 12 pages, 6 figures | MNRAS (April 1, 2015) 448 (2): 1232-1239 | 10.1093/mnras/stv052 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the possibility that the universe is subjected to a deformation,
besides its expansion described by Friedmann's equations. The concept of smooth
deformation of a riemannian manifolds associated with the extrinsic curvature
is applied the standard FLRW cosmology. Starting from the resulting modified
Friedman'... | [
{
"created": "Fri, 8 Aug 2014 00:06:38 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Nov 2014 22:53:15 GMT",
"version": "v2"
}
] | 2016-06-01 | [
[
"Capistrano",
"A. J. S",
""
]
] | We study the possibility that the universe is subjected to a deformation, besides its expansion described by Friedmann's equations. The concept of smooth deformation of a riemannian manifolds associated with the extrinsic curvature is applied the standard FLRW cosmology. Starting from the resulting modified Friedman's ... |
2301.11821 | Stephen Adler | Stephen L. Adler | Dynamical gravastars may evade no-go results for exotic compact objects,
together with further analytical and numerical results for the dynamical
gravastar model | 23 pages; introduction expanded, and Sec. 8 on time delays added | Physical Review D 109, 024020 (2024) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using graphs plotted from the Mathematica notebooks posted with our paper
``Dynamical Gravastars'', we show that a dynamical gravastar has no hard
surface, and that a second light sphere resides in the deep interior where
there is maximum time dilation. These facts may permit dynamical gravastars to
evade no-go resul... | [
{
"created": "Fri, 27 Jan 2023 16:22:07 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Jan 2023 17:05:45 GMT",
"version": "v2"
},
{
"created": "Mon, 13 Feb 2023 21:03:23 GMT",
"version": "v3"
},
{
"created": "Tue, 14 Mar 2023 15:21:17 GMT",
"version": "v4"
},
{
"c... | 2024-02-13 | [
[
"Adler",
"Stephen L.",
""
]
] | Using graphs plotted from the Mathematica notebooks posted with our paper ``Dynamical Gravastars'', we show that a dynamical gravastar has no hard surface, and that a second light sphere resides in the deep interior where there is maximum time dilation. These facts may permit dynamical gravastars to evade no-go results... |
1204.3667 | Hideyoshi Arakida | Hideyoshi Arakida | Effect of inhomogeneity of the Universe on a gravitationally bound local
system: A no-go result for explaining the secular increase in the
astronomical unit | 12 pages, no figure, accepted for publication in Journal of
Astrophysics and Astronomy | null | 10.1007/s12036-012-9142-8 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We will investigate the influence of the inhomogeneity of the universe,
especially that of the Lema{\^i}tre-Tolman-Bondi (LTB) model, on a
gravitationally bound local system such as the solar system. We concentrate on
the dynamical perturbation to the planetary motion and derive the leading order
effect generated fro... | [
{
"created": "Mon, 16 Apr 2012 23:30:58 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Arakida",
"Hideyoshi",
""
]
] | We will investigate the influence of the inhomogeneity of the universe, especially that of the Lema{\^i}tre-Tolman-Bondi (LTB) model, on a gravitationally bound local system such as the solar system. We concentrate on the dynamical perturbation to the planetary motion and derive the leading order effect generated from ... |
2209.02268 | Shao-Jun Zhang | Shao-Jun Zhang, Bin Wang, Eleftherios Papantonopoulos, Anzhong Wang | Magnetic-induced Spontaneous Scalarization in Dynamcial Chern-Simons
Gravity | 23 pages, 4 figures, a few more data and comments added to match the
published version | Eur.Phys.J.C (2023) 83:97 | 10.1140/epjc/s10052-023-11254-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of the dynamical Chern-Simons gravity, we study the scalar
field perturbations of the Reissner-Nordstr\"{o}m-Melvin spacetime, which
describes a charged black hole permeated by a uniform magnetic field. In the
presence of the magnetic field, the scalar field acquires an effective mass
whose square ta... | [
{
"created": "Tue, 6 Sep 2022 07:35:12 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Jan 2023 21:49:01 GMT",
"version": "v2"
}
] | 2023-02-02 | [
[
"Zhang",
"Shao-Jun",
""
],
[
"Wang",
"Bin",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Wang",
"Anzhong",
""
]
] | In the framework of the dynamical Chern-Simons gravity, we study the scalar field perturbations of the Reissner-Nordstr\"{o}m-Melvin spacetime, which describes a charged black hole permeated by a uniform magnetic field. In the presence of the magnetic field, the scalar field acquires an effective mass whose square take... |
gr-qc/9806072 | Chris J. Fama | C. J. Fama and C. J. S. Clarke | A rigidity result on the ideal boundary structure of smooth space-times | 14 pages, 2 figures; to appear in Clas. Quant. Grav | Class.Quant.Grav. 15 (1998) 2829-2840 | 10.1088/0264-9381/15/9/027 | null | gr-qc math.DG | null | Following a survey of the abstract boundary definition of Scott and Szekeres,
a rigidity result is proved for the smooth case, showing that the topological
structure of the regular part of this boundary in invariantly defined.
| [
{
"created": "Wed, 17 Jun 1998 13:45:05 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Fama",
"C. J.",
""
],
[
"Clarke",
"C. J. S.",
""
]
] | Following a survey of the abstract boundary definition of Scott and Szekeres, a rigidity result is proved for the smooth case, showing that the topological structure of the regular part of this boundary in invariantly defined. |
gr-qc/9506061 | null | Giampiero Esposito, Alexander Yu. Kamenshchik, Igor V. Mishakov,
Giuseppe Pollifrone | Euclidean Maxwell Theory in the Presence of Boundaries. II | 24 pages, plain-tex, recently appearing in Classical and Quantum
Gravity, volume 11, pages 2939-2950, December 1994. The authors apologize for
the delay in circulating the file, due to technical problems now fixed | Class.Quant.Grav.11:2939-2950,1994 | 10.1088/0264-9381/11/12/009 | null | gr-qc | null | Zeta-function regularization is applied to complete a recent analysis of the
quantized electromagnetic field in the presence of boundaries. The quantum
theory is studied by setting to zero on the boundary the magnetic field, the
gauge-averaging functional and hence the Faddeev-Popov ghost field. Electric
boundary con... | [
{
"created": "Tue, 27 Jun 1995 17:44:45 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Esposito",
"Giampiero",
""
],
[
"Kamenshchik",
"Alexander Yu.",
""
],
[
"Mishakov",
"Igor V.",
""
],
[
"Pollifrone",
"Giuseppe",
""
]
] | Zeta-function regularization is applied to complete a recent analysis of the quantized electromagnetic field in the presence of boundaries. The quantum theory is studied by setting to zero on the boundary the magnetic field, the gauge-averaging functional and hence the Faddeev-Popov ghost field. Electric boundary condi... |
2012.12875 | Kai Flathmann | Kai Flathmann, Manuel Hohmann | Post-Newtonian limit of generalized symmetric teleparallel gravity | 13 pages | Phys. Rev. D 103, 044030 (2021) | 10.1103/PhysRevD.103.044030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we analyze the post-Newtonian approximation of a
generalization of the symmetric teleparallel gravity with the help of the
parameterized post-Newtonian (PPN) formalism. This class of theories is based
on a free function of the five independent quadratic contractions of the
non-metricity tensor. By cal... | [
{
"created": "Wed, 23 Dec 2020 18:40:05 GMT",
"version": "v1"
}
] | 2021-02-24 | [
[
"Flathmann",
"Kai",
""
],
[
"Hohmann",
"Manuel",
""
]
] | In this article we analyze the post-Newtonian approximation of a generalization of the symmetric teleparallel gravity with the help of the parameterized post-Newtonian (PPN) formalism. This class of theories is based on a free function of the five independent quadratic contractions of the non-metricity tensor. By calcu... |
gr-qc/0509119 | Gioel Calabrese | Gioel Calabrese and Carsten Gundlach | Discrete boundary treatment for the shifted wave equation | 27 pages, 2 figures. Revised version | Class.Quant.Grav. 23 (2006) S343-S368 | 10.1088/0264-9381/23/16/S04 | null | gr-qc | null | We present strongly stable semi-discrete finite difference approximations to
the quarter space problem (x>0, t>0) for the first order in time, second order
in space wave equation with a shift term. We consider space-like (pure outflow)
and time-like boundaries, with either second or fourth order accuracy. These
discr... | [
{
"created": "Thu, 29 Sep 2005 15:55:47 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Jul 2006 10:31:33 GMT",
"version": "v2"
}
] | 2024-07-11 | [
[
"Calabrese",
"Gioel",
""
],
[
"Gundlach",
"Carsten",
""
]
] | We present strongly stable semi-discrete finite difference approximations to the quarter space problem (x>0, t>0) for the first order in time, second order in space wave equation with a shift term. We consider space-like (pure outflow) and time-like boundaries, with either second or fourth order accuracy. These discret... |
2112.11162 | Hrvoje Nikolic | Hrvoje Nikolic | Submarine paradox softened | 8 pages, 1 figure, significantly revised and extended, accepted for
publication in Am. J. Phys | Am. J. Phys. 90, 841 (2022) | 10.1119/5.0084185 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Supplee's submarine paradox, a naive argument based on Lorentz contraction
leads to a contradiction that a fast submarine should sink in the water's
reference frame but float in the submarine's reference frame. Due to the
submarine's rigidity constraints, it is not easy to resolve the paradox in a
manifestly covar... | [
{
"created": "Tue, 21 Dec 2021 12:57:39 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Dec 2021 10:02:00 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Aug 2022 05:56:45 GMT",
"version": "v3"
}
] | 2024-06-19 | [
[
"Nikolic",
"Hrvoje",
""
]
] | In Supplee's submarine paradox, a naive argument based on Lorentz contraction leads to a contradiction that a fast submarine should sink in the water's reference frame but float in the submarine's reference frame. Due to the submarine's rigidity constraints, it is not easy to resolve the paradox in a manifestly covaria... |
1909.02434 | T. P. Singh | Palemkota Maithresh and Tejinder P. Singh | Black hole entropy from trace dynamics and non-commutative geometry | v2: 29 pages, one figure. Significantly revised, including change of
title. Background material included [from arXiv:1903.05402 [gr-qc],
arXiv:1905.08248 [gr-qc], arXiv:1908.04309 [gr-qc]] so as to make this paper
self-contained and more easily readable. Derivation of Bekenstein-Hawking
entropy remains unchange... | null | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spontaneous localisation is a falsifiable, phenomenological, mechanism for
explaining the absence of macroscopic position superpositions, currently being
tested for in the laboratory. The theory of trace dynamics provides a possible
theoretical origin for spontaneous localisation. We have recently proposed how
to emp... | [
{
"created": "Thu, 5 Sep 2019 14:16:54 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jan 2020 17:25:43 GMT",
"version": "v2"
}
] | 2020-01-08 | [
[
"Maithresh",
"Palemkota",
""
],
[
"Singh",
"Tejinder P.",
""
]
] | Spontaneous localisation is a falsifiable, phenomenological, mechanism for explaining the absence of macroscopic position superpositions, currently being tested for in the laboratory. The theory of trace dynamics provides a possible theoretical origin for spontaneous localisation. We have recently proposed how to emplo... |
1805.10683 | H{\aa}kan Andr\'easson | H{\aa}kan Andr\'easson, Markus Kunze | Comments on the paper 'Static solutions of the Vlasov-Einstein system'
by G. Wolansky | 9 pages | Arch. Ration. Mech. Anal. 235, 783-791 (2020) | 10.1007/s00205-019-01432-2 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note we address the attempted proof of the existence of static
solutions to the Einstein-Vlasov system as given in \cite{Wol}. We focus on a
specific and central part of the proof which concerns a variational problem
with an obstacle. We show that two important claims in \cite{Wol} are incorrect
and we questi... | [
{
"created": "Sun, 27 May 2018 20:43:37 GMT",
"version": "v1"
}
] | 2024-02-19 | [
[
"Andréasson",
"Håkan",
""
],
[
"Kunze",
"Markus",
""
]
] | In this note we address the attempted proof of the existence of static solutions to the Einstein-Vlasov system as given in \cite{Wol}. We focus on a specific and central part of the proof which concerns a variational problem with an obstacle. We show that two important claims in \cite{Wol} are incorrect and we question... |
gr-qc/0701151 | Matyas Vasuth | L\'aszl\'o \'A. Gergely, Zolt\'an I. Perj\'es and M\'aty\'as Vas\'uth | Generalized true- and eccentric-anomaly parametrizations for the
perturbed Kepler motion | null | Proceedings of the Ninth Marcel Grossmann Meeting 2000 on Recent
Developments in Theoretical and Experimental General Relativity, Gravitation
and Relativistic Field Theories. Eds. VG Gurzadyan, RT Jantzen and R Ruffini,
World Scientific, Singapore, p.1751-1752 (2002) | null | null | gr-qc | null | The true- and eccentric-anomaly parametrizations of the Kepler motion are
generalized to quasiperiodic orbits by considering perturbations of the radial
part of kinetic energy as a series in the negative powers of the orbital
radius. A toolbox of methods for averaging observables in terms of the energy
$E$ and angula... | [
{
"created": "Sat, 27 Jan 2007 21:47:39 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gergely",
"László Á.",
""
],
[
"Perjés",
"Zoltán I.",
""
],
[
"Vasúth",
"Mátyás",
""
]
] | The true- and eccentric-anomaly parametrizations of the Kepler motion are generalized to quasiperiodic orbits by considering perturbations of the radial part of kinetic energy as a series in the negative powers of the orbital radius. A toolbox of methods for averaging observables in terms of the energy $E$ and angular ... |
gr-qc/0106010 | Louis Scheffer | Louis K. Scheffer | Support for a prosaic explanation for the anomalous acceleration of
Pioneer 10 and 11 | 3 pages, revtex4 | null | null | null | gr-qc | null | Anderson, et al., find the measured trajectories of Pioneer 10 and 11
spacecraft deviate from the trajectories computed from known forces acting on
them. This unmodelled acceleration can be accounted for by non-isotropic
radiation of spacecraft heat. This explanation was first proposed by Murphy,
but Anderson, et al.... | [
{
"created": "Mon, 4 Jun 2001 19:43:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Scheffer",
"Louis K.",
""
]
] | Anderson, et al., find the measured trajectories of Pioneer 10 and 11 spacecraft deviate from the trajectories computed from known forces acting on them. This unmodelled acceleration can be accounted for by non-isotropic radiation of spacecraft heat. This explanation was first proposed by Murphy, but Anderson, et al. f... |
gr-qc/9708033 | Alberto Vecchio | A. Vecchio, B. Bertotti and L. Iess | Coalescing binaries and Doppler experiments | 5 pages, LaTeX, one postscript figure included. Talk given at the
"Second Amaldi Conference on Gravitational Waves" (CERN, 1-4 July 1997). To
be published in the Proceedings (World Scientific, Singapore), eds. E. Coccia
et al | null | null | null | gr-qc | null | We discuss the sensitivity of the CASSINI experiments to gravitational waves
emitted by the in-spiral of compact binaries. We show that the maximum distance
reachable by the instrument is $\sim 100$ Mpc. In particular, CASSINI can
detect massive black hole binaries with chirp mass $\simgt 10^6 \Ms$ in the
Virgo Clust... | [
{
"created": "Sat, 16 Aug 1997 09:17:10 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Vecchio",
"A.",
""
],
[
"Bertotti",
"B.",
""
],
[
"Iess",
"L.",
""
]
] | We discuss the sensitivity of the CASSINI experiments to gravitational waves emitted by the in-spiral of compact binaries. We show that the maximum distance reachable by the instrument is $\sim 100$ Mpc. In particular, CASSINI can detect massive black hole binaries with chirp mass $\simgt 10^6 \Ms$ in the Virgo Cluster... |
2203.07708 | Chiranjeeb Singha | Chiranjeeb Singha, Sumanta Chakraborty, Naresh Dadhich | Strong cosmic censorship conjecture for a charged BTZ black hole | 20 pages, 6 figures | JHEP06(2022)028 | 10.1007/JHEP06(2022)028 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The strong cosmic censorship conjecture, whose validation asserts the
deterministic nature of general relativity, has been studied for charged BTZ
black holes in three dimensional general relativity, as well as for Nth order
pure Lovelock gravity in d=2N+1 spacetime dimensions. Through both analytical
and numerical r... | [
{
"created": "Tue, 15 Mar 2022 07:56:24 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Mar 2022 10:24:52 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Jun 2022 06:06:58 GMT",
"version": "v3"
}
] | 2022-06-08 | [
[
"Singha",
"Chiranjeeb",
""
],
[
"Chakraborty",
"Sumanta",
""
],
[
"Dadhich",
"Naresh",
""
]
] | The strong cosmic censorship conjecture, whose validation asserts the deterministic nature of general relativity, has been studied for charged BTZ black holes in three dimensional general relativity, as well as for Nth order pure Lovelock gravity in d=2N+1 spacetime dimensions. Through both analytical and numerical rou... |
0712.0464 | Valentin Kuzmichev | V. E. Kuzmichev, V. V. Kuzmichev (Bogolyubov Institute for Theoretical
Physics) | The Big Bang quantum cosmology: The matter-energy production epoch | 16 pages, v.2 a few misprints are corrected and small additional
explanations are provided | Acta Phys.Polon.B39:979,2008 | null | null | gr-qc astro-ph | null | The exactly solvable quantum model of the homogeneous, isotropic and closed
universe in the matter-energy production epoch is considered. It is assumed
that the universe is originally filled with a uniform scalar field and a
perfect fluid which defines a reference frame. The stationary state spectrum
and the wave fun... | [
{
"created": "Tue, 4 Dec 2007 09:36:50 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Apr 2008 08:59:57 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Kuzmichev",
"V. E.",
"",
"Bogolyubov Institute for Theoretical\n Physics"
],
[
"Kuzmichev",
"V. V.",
"",
"Bogolyubov Institute for Theoretical\n Physics"
]
] | The exactly solvable quantum model of the homogeneous, isotropic and closed universe in the matter-energy production epoch is considered. It is assumed that the universe is originally filled with a uniform scalar field and a perfect fluid which defines a reference frame. The stationary state spectrum and the wave funct... |
gr-qc/0604074 | Rajeev Bhalerao | B. Ram and J. Shirley | The quantum black hole in 2+1 dimensions | 5 pages, no figs | null | null | null | gr-qc astro-ph quant-ph | null | In this paper we investigate the quantum nature of a 2+1 dimensional black
hole using the method [arXiv: gr-qc/0504030] which earlier revealed the quantum
nature of a black hole in 3+1 dimensions.
| [
{
"created": "Tue, 18 Apr 2006 05:19:39 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ram",
"B.",
""
],
[
"Shirley",
"J.",
""
]
] | In this paper we investigate the quantum nature of a 2+1 dimensional black hole using the method [arXiv: gr-qc/0504030] which earlier revealed the quantum nature of a black hole in 3+1 dimensions. |
1604.07639 | Yoo Geun Song | Yoogeun Song and Seok Jae Park | The Influence of the Shear on the Gravitational Waves in the Early
Anisotropic Universe | arXiv admin note: text overlap with arXiv:1103.0300 by other authors | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the singularity of the congruences for both timelike and null
geodesic curves using the expansion of the early anisotropic Bianchi type I
Universe. In this paper, we concentrate on the influence of the shear of the
timelike and null geodesic congruences in the early Universe. Under some
natural conditions, w... | [
{
"created": "Mon, 25 Apr 2016 07:28:24 GMT",
"version": "v1"
}
] | 2016-04-27 | [
[
"Song",
"Yoogeun",
""
],
[
"Park",
"Seok Jae",
""
]
] | We study the singularity of the congruences for both timelike and null geodesic curves using the expansion of the early anisotropic Bianchi type I Universe. In this paper, we concentrate on the influence of the shear of the timelike and null geodesic congruences in the early Universe. Under some natural conditions, we ... |
1308.4976 | Suprit Singh | Suprit Singh, Sujoy Kumar Modak and T. Padmanabhan | Evolution of quantum field, particle content and classicality in the
three stage universe | Version 2. Added section IV C. Published in Physical Review D | Phys. Rev. D 88, 125020 (2013) | 10.1103/PhysRevD.88.125020 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evolution of a quantum scalar field in a toy universe which has
three stages of evolution, viz., (i) an early (inflationary) de Sitter phase
(ii) radiation dominated phase and (iii) late-time (cosmological constant
dominated) de Sitter phase. Using Schr\"odinger picture, the scalar field
equations are so... | [
{
"created": "Thu, 22 Aug 2013 20:00:06 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Dec 2013 09:05:47 GMT",
"version": "v2"
}
] | 2013-12-12 | [
[
"Singh",
"Suprit",
""
],
[
"Modak",
"Sujoy Kumar",
""
],
[
"Padmanabhan",
"T.",
""
]
] | We study the evolution of a quantum scalar field in a toy universe which has three stages of evolution, viz., (i) an early (inflationary) de Sitter phase (ii) radiation dominated phase and (iii) late-time (cosmological constant dominated) de Sitter phase. Using Schr\"odinger picture, the scalar field equations are solv... |
gr-qc/0701063 | Salvatore Antoci | S. Antoci, D.-E. Liebscher, L. Mihich | Electrostatics and confinement in Einstein's unified field theory | 4 pages, talk given at MG11, Berlin, July 2006 | null | 10.1142/9789812834300_0122 | null | gr-qc hep-th | null | A way for appending sources at the right-hand sides of the field equations of
Einstein's unified field theory is recalled. Two exact solutions endowed with
point sources in equilibrium are shown, and their physical meaning is
discussed.
| [
{
"created": "Thu, 11 Jan 2007 15:37:59 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Antoci",
"S.",
""
],
[
"Liebscher",
"D. -E.",
""
],
[
"Mihich",
"L.",
""
]
] | A way for appending sources at the right-hand sides of the field equations of Einstein's unified field theory is recalled. Two exact solutions endowed with point sources in equilibrium are shown, and their physical meaning is discussed. |
1502.00073 | Christos Tzounis | Shohreh Abdolrahimi, Robert B. Mann and Christos Tzounis | Distorted Local Shadows | 17 pages 18 figures | Phys. Rev. D 91, 084052 (2015) | 10.1103/PhysRevD.91.084052 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce the notion of a local shadow for a black hole and determine its
shape for the particular case of a distorted Schwarzschild black hole.
Considering the lowest-order even and odd multiple moments, we compute the
relation between the deformations of the shadow of a Schwarzschild black hole
and the distortio... | [
{
"created": "Sat, 31 Jan 2015 06:05:00 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Feb 2015 17:36:22 GMT",
"version": "v2"
},
{
"created": "Wed, 11 Feb 2015 01:51:24 GMT",
"version": "v3"
},
{
"created": "Wed, 22 Apr 2015 00:57:24 GMT",
"version": "v4"
}
] | 2015-05-11 | [
[
"Abdolrahimi",
"Shohreh",
""
],
[
"Mann",
"Robert B.",
""
],
[
"Tzounis",
"Christos",
""
]
] | We introduce the notion of a local shadow for a black hole and determine its shape for the particular case of a distorted Schwarzschild black hole. Considering the lowest-order even and odd multiple moments, we compute the relation between the deformations of the shadow of a Schwarzschild black hole and the distortion ... |
gr-qc/9804043 | Walentin D. Gladush | V.D. Gladush and R.A. Konoplya | Split structures in general relativity and the Kaluza-Klein theories | 30 pages, RevTeX, aps.sty, some additions and corrections, new
references added | J.Math.Phys.40:955-979,1999 | 10.1063/1.532697 | null | gr-qc math.DG | null | We construct a general approach to decomposition of the tangent bundle of
pseudo-Riemannian manifolds into direct sums of subbundles, and the associated
decomposition of geometric objects. An invariant structure {\cal H}^r defined
as a set of r projection operators is used to induce decomposition of the
geometric obj... | [
{
"created": "Mon, 20 Apr 1998 12:29:56 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Nov 1998 15:32:29 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Gladush",
"V. D.",
""
],
[
"Konoplya",
"R. A.",
""
]
] | We construct a general approach to decomposition of the tangent bundle of pseudo-Riemannian manifolds into direct sums of subbundles, and the associated decomposition of geometric objects. An invariant structure {\cal H}^r defined as a set of r projection operators is used to induce decomposition of the geometric objec... |
1905.06206 | Edward Anderson | Edward Anderson | A Local Resolution of the Problem of Time. II. Configurational
Relationalism via a generalization of Group Averaging | 28 pages, including 8 figures. v4 has minor presentational upgrades | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we consider a second Problem of Time Facet. This started
life as Wheeler's Thin Sandwich Problem, within the narrow context of 1)
GR-as-Geometrodynamics, in particular its momentum constraint. 2) A Lagrangian
variables level treatment. Conceiving in terms of Barbour's Best Matching is a
freeing from ... | [
{
"created": "Wed, 15 May 2019 14:23:33 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Jun 2019 14:18:18 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Jul 2019 16:55:05 GMT",
"version": "v3"
},
{
"created": "Thu, 24 Oct 2019 15:38:30 GMT",
"version": "v4"
}
] | 2019-10-25 | [
[
"Anderson",
"Edward",
""
]
] | In this article, we consider a second Problem of Time Facet. This started life as Wheeler's Thin Sandwich Problem, within the narrow context of 1) GR-as-Geometrodynamics, in particular its momentum constraint. 2) A Lagrangian variables level treatment. Conceiving in terms of Barbour's Best Matching is a freeing from 1)... |
1811.04061 | Kuantay Boshkayev | Kuantay Boshkayev and Daniele Malafarina | A model for a dark matter core at the galactic center | 9 pages, 9 figures | null | 10.1093/mnras/stz219 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a toy model for the supermassive compact object at the galactic
center that does not require the presence of a black hole. We assume a matter
distribution of weakly interacting particles with a density profile inferred
from dark matter profiles in the outer regions. We show that rotation curves
close to t... | [
{
"created": "Fri, 9 Nov 2018 18:43:35 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Dec 2018 14:16:13 GMT",
"version": "v2"
}
] | 2019-05-20 | [
[
"Boshkayev",
"Kuantay",
""
],
[
"Malafarina",
"Daniele",
""
]
] | We consider a toy model for the supermassive compact object at the galactic center that does not require the presence of a black hole. We assume a matter distribution of weakly interacting particles with a density profile inferred from dark matter profiles in the outer regions. We show that rotation curves close to the... |
gr-qc/0407098 | Etera R. Livine | Florian Girelli, Etera R. Livine | Special Relativity as a non commutative geometry: Lessons for Deformed
Special Relativity | 24 pages, RevTeX4 | null | null | null | gr-qc hep-th | null | Deformed Special Relativity (DSR) is obtained by imposing a maximal energy to
Special Relativity and deforming the Lorentz symmetry (more exactly the
Poincar\'e symmetry) to accommodate this requirement. One can apply the same
procedure deforming the Galilean symmetry in order to impose a maximal speed
(the speed of ... | [
{
"created": "Mon, 26 Jul 2004 18:58:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Girelli",
"Florian",
""
],
[
"Livine",
"Etera R.",
""
]
] | Deformed Special Relativity (DSR) is obtained by imposing a maximal energy to Special Relativity and deforming the Lorentz symmetry (more exactly the Poincar\'e symmetry) to accommodate this requirement. One can apply the same procedure deforming the Galilean symmetry in order to impose a maximal speed (the speed of li... |
1509.02854 | Peter Wolf | Peter Wolf and Luc Blanchet | Analysis of Sun/Moon Gravitational Redshift tests with the STE-QUEST
Space Mission | 17 pages, 3 figures | Classical and Quantum Gravity, 2016, 33, 035012 | 10.1088/0264-9381/33/3/035012 | null | gr-qc physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The STE-QUEST space mission will perform tests of the gravitational redshift
in the field of the Sun and the Moon to high precision by frequency comparisons
of clocks attached to the ground and separated by intercontinental distances.
In the absence of Einstein equivalence principle (EP) violation, the redshift
is ze... | [
{
"created": "Wed, 9 Sep 2015 17:14:20 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Nov 2015 09:13:10 GMT",
"version": "v2"
}
] | 2016-01-27 | [
[
"Wolf",
"Peter",
""
],
[
"Blanchet",
"Luc",
""
]
] | The STE-QUEST space mission will perform tests of the gravitational redshift in the field of the Sun and the Moon to high precision by frequency comparisons of clocks attached to the ground and separated by intercontinental distances. In the absence of Einstein equivalence principle (EP) violation, the redshift is zero... |
gr-qc/0004055 | Mauricio Cataldo Monsalves | M. Cataldo and S. del Campo | Comment on "Viscous cosmology in the Kasner metric" | 2 pages, Latex, accepted in Phys. Rev. D | Phys.Rev. D61 (2000) 128301 | 10.1103/PhysRevD.61.128301 | null | gr-qc | null | We show in this comment that in an anisotropic Bianchi type I model of the
Kasner form, it is not possible to describe the growth of entropy, if we want
to keep the thermodynamics together with the dominant energy conditions. This
consequence disagrees with the results obtained by Brevik and Pettersen [Phys.
Rev. D 5... | [
{
"created": "Mon, 17 Apr 2000 16:03:43 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Cataldo",
"M.",
""
],
[
"del Campo",
"S.",
""
]
] | We show in this comment that in an anisotropic Bianchi type I model of the Kasner form, it is not possible to describe the growth of entropy, if we want to keep the thermodynamics together with the dominant energy conditions. This consequence disagrees with the results obtained by Brevik and Pettersen [Phys. Rev. D 56,... |
1506.02012 | Hendrik Jennen | H. Jennen, J. G. Pereira | Dark energy as a kinematic effect | 6 pages, conclusions updated, references added | Phys. Dark Univ. 11 (2016) 49-53 | 10.1016/j.dark.2015.11.002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a generalization of teleparallel gravity that is consistent with
local spacetime kinematics regulated by the de Sitter group $SO(1,4)$. The
mathematical structure of teleparallel gravity is shown to be given by a
nonlinear Riemann-Cartan geometry without curvature, which inspires us to build
the generaliza... | [
{
"created": "Fri, 5 Jun 2015 19:17:06 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Dec 2015 11:41:59 GMT",
"version": "v2"
}
] | 2015-12-04 | [
[
"Jennen",
"H.",
""
],
[
"Pereira",
"J. G.",
""
]
] | We present a generalization of teleparallel gravity that is consistent with local spacetime kinematics regulated by the de Sitter group $SO(1,4)$. The mathematical structure of teleparallel gravity is shown to be given by a nonlinear Riemann-Cartan geometry without curvature, which inspires us to build the generalizati... |
gr-qc/9402012 | Friedrich Wilhelm Hehl | F.W. Hehl, J.D. McCrea, E.W. Mielke, Y. Ne'eman | Metric-Affine Gauge Theory of Gravity: Field Equations, Noether
Identities, World Spinors, and Breaking of Dilation Invariance | 197 pages | Phys.Rept.258:1-171,1995 | 10.1016/0370-1573(94)00111-F | Tel-Aviv University preprint N192 (1994) | gr-qc hep-th | null | In Einstein's gravitational theory, the spacetime is Riemannian, that is, it
has vanishing torsion and vanishing nonmetricity (covariant derivative of the
metric). In the gauging of the general affine group ${A}(4,R)$ and of its
subgroup ${GL}(4,R)$ in four dimensions, energy--momentum and hypermomentum
currents of m... | [
{
"created": "Fri, 4 Feb 1994 16:03:04 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Hehl",
"F. W.",
""
],
[
"McCrea",
"J. D.",
""
],
[
"Mielke",
"E. W.",
""
],
[
"Ne'eman",
"Y.",
""
]
] | In Einstein's gravitational theory, the spacetime is Riemannian, that is, it has vanishing torsion and vanishing nonmetricity (covariant derivative of the metric). In the gauging of the general affine group ${A}(4,R)$ and of its subgroup ${GL}(4,R)$ in four dimensions, energy--momentum and hypermomentum currents of mat... |
1411.0833 | Meng-Sen Ma | Meng-Sen Ma, Ren Zhao | Corrected form of the first law of thermodynamics for regular black
holes | 11 pages, no figures, to be published in Classical and Quantum
Gravity | null | 10.1088/0264-9381/31/24/245014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show by explicit computations that there is a superficial inconsistency
between the conventional first law of black hole thermodynamics and
Bekenstein-Hawking area law for three types of regular black holes. The
corrected form of the first law for these regular black holes is given. The
derivation relies on the ge... | [
{
"created": "Tue, 4 Nov 2014 09:31:21 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Ma",
"Meng-Sen",
""
],
[
"Zhao",
"Ren",
""
]
] | We show by explicit computations that there is a superficial inconsistency between the conventional first law of black hole thermodynamics and Bekenstein-Hawking area law for three types of regular black holes. The corrected form of the first law for these regular black holes is given. The derivation relies on the gene... |
1805.05664 | Rituparno Goswami | Sayuri Singh, Rituparno Goswami, Sunil D. Maharaj | Conformal Symmetries of Locally Rotationally Symmetric Spacetimes | 6 pages, Revtex4 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we investigate conformal symmetries in Locally Rotationally
Symmetric (LRS) spacetimes using a semitetrad covariant formalism. We
demonstrate that a general LRS spacetime which rotates and spatially twists
simultaneously has an inherent homothetic symmetry in the plane spanned by the
fluid flow lines an... | [
{
"created": "Tue, 15 May 2018 09:35:09 GMT",
"version": "v1"
}
] | 2018-05-16 | [
[
"Singh",
"Sayuri",
""
],
[
"Goswami",
"Rituparno",
""
],
[
"Maharaj",
"Sunil D.",
""
]
] | In this paper we investigate conformal symmetries in Locally Rotationally Symmetric (LRS) spacetimes using a semitetrad covariant formalism. We demonstrate that a general LRS spacetime which rotates and spatially twists simultaneously has an inherent homothetic symmetry in the plane spanned by the fluid flow lines and ... |
gr-qc/0111058 | Carlos Augusto Romero Filho | F. Dahia and C. Romero | The embedding of the spacetime in five-dimensional spaces with arbitrary
non-degenerate Ricci tensor | null | J.Math.Phys. 43 (2002) 3097-3106 | 10.1063/1.1473680 | null | gr-qc | null | We discuss and prove a theorem which asserts that any n-dimensional
semi-Riemannian manifold can be locally embedded in a (n+1)-dimensional space
with a non-degenerate Ricci tensor which is equal, up to a local analytic
diffeomorphism, to the Ricci tensor of an arbitrary specified space. This may
be regarded as a fur... | [
{
"created": "Mon, 19 Nov 2001 01:50:02 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Dahia",
"F.",
""
],
[
"Romero",
"C.",
""
]
] | We discuss and prove a theorem which asserts that any n-dimensional semi-Riemannian manifold can be locally embedded in a (n+1)-dimensional space with a non-degenerate Ricci tensor which is equal, up to a local analytic diffeomorphism, to the Ricci tensor of an arbitrary specified space. This may be regarded as a furth... |
gr-qc/9903013 | Alicia M. Sintes | Alicia M. Sintes and Bernard F. Schutz | Removing non-stationary, non-harmonic external interference from
gravitational wave interferometer data | 14 pages, 5 figures, Revtex, psfig | Phys.Rev.D60:062001,1999 | 10.1103/PhysRevD.60.062001 | null | gr-qc | null | We describe a procedure to identify and remove a class of non-stationary and
non-harmonic interference lines from gravitational wave interferometer data.
These lines appear to be associated with the external electricity main
supply, but their amplitudes are non-stationary and they do not appear at
harmonics of the ... | [
{
"created": "Wed, 3 Mar 1999 08:39:34 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Sintes",
"Alicia M.",
""
],
[
"Schutz",
"Bernard F.",
""
]
] | We describe a procedure to identify and remove a class of non-stationary and non-harmonic interference lines from gravitational wave interferometer data. These lines appear to be associated with the external electricity main supply, but their amplitudes are non-stationary and they do not appear at harmonics of the fund... |
gr-qc/0108045 | S. Antoci | S. Antoci | A Rule for the Equilibrium of Forces in the Hermitian Theory of
Relativity | 7 pages; for the method of solution see e.g. gr-qc/0108042 | Annalen Phys. 44 (1987) 127 | null | null | gr-qc | null | When the behaviour of the singularities, which are used to represent masses,
charges or currents in exact solutions to the field equations of the Hermitian
theory of relativity, is restricted by a no-jump rule, conditions are obtained,
which determine the relative positions of masses, charges and currents. Due to
the... | [
{
"created": "Fri, 17 Aug 2001 17:25:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Antoci",
"S.",
""
]
] | When the behaviour of the singularities, which are used to represent masses, charges or currents in exact solutions to the field equations of the Hermitian theory of relativity, is restricted by a no-jump rule, conditions are obtained, which determine the relative positions of masses, charges and currents. Due to these... |
gr-qc/0511059 | Laszlo B. Szabados | Laszlo B Szabados | On a class of 2-surface observables in general relativity | 11 pages, a discussion of the observables in stationary spacetimes is
included, new references are added, typos corrected | Class.Quant.Grav. 23 (2006) 2291-2302 | 10.1088/0264-9381/23/7/006 | NI06005-GMR | gr-qc | null | The boundary conditions for canonical vacuum general relativity is
investigated at the quasi-local level. It is shown that fixing the area element
on the 2- surface S (rather than the induced 2-metric) is enough to have a well
defined constraint algebra, and a well defined Poisson algebra of basic
Hamiltonians parame... | [
{
"created": "Fri, 11 Nov 2005 15:18:07 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Feb 2006 16:30:51 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Szabados",
"Laszlo B",
""
]
] | The boundary conditions for canonical vacuum general relativity is investigated at the quasi-local level. It is shown that fixing the area element on the 2- surface S (rather than the induced 2-metric) is enough to have a well defined constraint algebra, and a well defined Poisson algebra of basic Hamiltonians paramete... |
2007.11009 | Wenzer Qin | Wenzer Qin, Kimberly K. Boddy, and Marc Kamionkowski | Subluminal stochastic gravitational waves in pulsar-timing arrays and
astrometry | 12 pages, 5 figures, 1 table; v2: matches published version | Phys. Rev. D 103, 024045 (2021) | 10.1103/PhysRevD.103.024045 | MIT-CTP/5222 | gr-qc astro-ph.GA hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of a stochastic background of low-frequency gravitational waves
by pulsar-timing and astrometric surveys will enable tests of gravitational
theories beyond general relativity. These theories generally permit
gravitational waves with non-Einsteinian polarization modes, which may
propagate slower than the... | [
{
"created": "Tue, 21 Jul 2020 18:00:05 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jan 2021 18:48:16 GMT",
"version": "v2"
}
] | 2021-01-26 | [
[
"Qin",
"Wenzer",
""
],
[
"Boddy",
"Kimberly K.",
""
],
[
"Kamionkowski",
"Marc",
""
]
] | The detection of a stochastic background of low-frequency gravitational waves by pulsar-timing and astrometric surveys will enable tests of gravitational theories beyond general relativity. These theories generally permit gravitational waves with non-Einsteinian polarization modes, which may propagate slower than the s... |
1309.5596 | Victor Shchigolev Konstantinovich | V.K. Shchigolev | Homotopy Perturbation Method for Solving a Spatially Flat FRW
Cosmological Model | 5 pages, 3 figures | Universal Journal of Applied Mathematics 2(2): 99-103, 2014 | 10.13189/ujam.2014.020204 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper, we study a homogeneous cosmological model in
Friedmann-Robertson-Walker (FRW) space-time by means of the so-called Homotopy
Perturbation Method (HPM). First, we briefly recall the main equations of the
cosmological model and the basic idea of HPM. Next we consider the test example
when the exact... | [
{
"created": "Sun, 22 Sep 2013 13:09:14 GMT",
"version": "v1"
}
] | 2014-01-03 | [
[
"Shchigolev",
"V. K.",
""
]
] | In the present paper, we study a homogeneous cosmological model in Friedmann-Robertson-Walker (FRW) space-time by means of the so-called Homotopy Perturbation Method (HPM). First, we briefly recall the main equations of the cosmological model and the basic idea of HPM. Next we consider the test example when the exact s... |
1504.01547 | Mariusz Dabrowski P. | Mariusz P. Dabrowski and H. Gohar | Abolishing the maximum tension principle | 5 pages, no figures, REVTEX4-1, a typo in abstract corrected | Physics Letters B 748, Volume 748, pp 428-431 (2015) | 10.1016/j.physletb.2015.07.047 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find the series of example theories for which the relativistic limit of
maximum tension $F_{max} = c^4/4G$ represented by the entropic force can be
abolished. Among them the varying constants theories, some generalized entropy
models applied both for cosmological and black hole horizons as well as some
generalized... | [
{
"created": "Tue, 7 Apr 2015 11:01:12 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Apr 2015 21:30:29 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Apr 2015 19:55:52 GMT",
"version": "v3"
}
] | 2015-09-15 | [
[
"Dabrowski",
"Mariusz P.",
""
],
[
"Gohar",
"H.",
""
]
] | We find the series of example theories for which the relativistic limit of maximum tension $F_{max} = c^4/4G$ represented by the entropic force can be abolished. Among them the varying constants theories, some generalized entropy models applied both for cosmological and black hole horizons as well as some generalized u... |
2104.07336 | Jose M. Carmona | Jos\'e Manuel Carmona, Jos\'e Luis Cort\'es and Jos\'e Javier Relancio | Curved momentum space, locality, and generalized space-time | 18 pages | Universe 7, 4 (2021) | 10.3390/universe7040099 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish the correspondence between two apparently unrelated but in fact
complementary approaches of a relativistic deformed kinematics: the geometric
properties of momentum space and the loss of absolute locality in canonical
spacetime, which can be restored with the introduction of a generalized
spacetime. This... | [
{
"created": "Thu, 15 Apr 2021 09:50:34 GMT",
"version": "v1"
}
] | 2021-04-16 | [
[
"Carmona",
"José Manuel",
""
],
[
"Cortés",
"José Luis",
""
],
[
"Relancio",
"José Javier",
""
]
] | We establish the correspondence between two apparently unrelated but in fact complementary approaches of a relativistic deformed kinematics: the geometric properties of momentum space and the loss of absolute locality in canonical spacetime, which can be restored with the introduction of a generalized spacetime. This c... |
2309.03121 | Jahed Abedi | Jahed Abedi, Collin D. Capano, Shilpa Kastha, Alexander H. Nitz,
Yi-Fan Wang, Julian Westerweck, Alex B. Nielsen, Badri Krishnan | Spectroscopy for asymmetric binary black hole mergers | 11 pages, 6 figures, 2 tables, accepted for publication in Phys. Rev.
D | null | 10.1103/PhysRevD.108.104009 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study Bayesian inference of black hole ringdown modes for simulated binary
black hole signals. We consider to what extent different fundamental ringdown
modes can be identified in the context of black hole spectroscopy. Our
simulated signals are inspired by the high mass event GW190521. We find strong
correlation ... | [
{
"created": "Wed, 6 Sep 2023 15:56:47 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Oct 2023 01:30:29 GMT",
"version": "v2"
}
] | 2023-11-10 | [
[
"Abedi",
"Jahed",
""
],
[
"Capano",
"Collin D.",
""
],
[
"Kastha",
"Shilpa",
""
],
[
"Nitz",
"Alexander H.",
""
],
[
"Wang",
"Yi-Fan",
""
],
[
"Westerweck",
"Julian",
""
],
[
"Nielsen",
"Alex B.",
""
],
... | We study Bayesian inference of black hole ringdown modes for simulated binary black hole signals. We consider to what extent different fundamental ringdown modes can be identified in the context of black hole spectroscopy. Our simulated signals are inspired by the high mass event GW190521. We find strong correlation be... |
1402.2077 | Jacek Tafel | Ji\v{r}\'i Bi\v{c}\'ak and Jacek Tafel | Exact solutions and their interpretation - session A1 | 15 pages | Gen. Rel. Grav. (2014) 46:1685 | 10.1007/s10714-014-1685-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report on the oral contributions and give a list of posters presented in
the session A1 "Exact solutions and their interpretation" at the 20th
International Conference on General Relativity and Gravitation (GR 20) in
Warsaw, July 7-13, 2013.
| [
{
"created": "Mon, 10 Feb 2014 09:33:10 GMT",
"version": "v1"
}
] | 2015-07-31 | [
[
"Bičák",
"Jiří",
""
],
[
"Tafel",
"Jacek",
""
]
] | We report on the oral contributions and give a list of posters presented in the session A1 "Exact solutions and their interpretation" at the 20th International Conference on General Relativity and Gravitation (GR 20) in Warsaw, July 7-13, 2013. |
1006.2229 | Wen-Biao Han | Wen-Biao Han | Chaos and dynamics of spinning particles in Kerr spacetime | 17 pages, 12 figures | Gen.Rel.Grav.40:1831-1847,2008 | 10.1007/s10714-007-0598-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study chaos dynamics of spinning particles in Kerr spacetime of rotating
black holes use the Papapetrou equations by numerical integration. Because of
spin, this system exists many chaos solutions, and exhibits some exceptional
dynamic character. We investigate the relations between the orbits chaos and
the spin m... | [
{
"created": "Fri, 11 Jun 2010 08:28:17 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Han",
"Wen-Biao",
""
]
] | We study chaos dynamics of spinning particles in Kerr spacetime of rotating black holes use the Papapetrou equations by numerical integration. Because of spin, this system exists many chaos solutions, and exhibits some exceptional dynamic character. We investigate the relations between the orbits chaos and the spin mag... |
1111.4046 | Alexander Zhuk | Maxim Eingorn, Alexandra Kudinova and Alexander Zhuk | Non-relativistic limit of Randall-Sundrum model: solutions, applications
and constraints | LaTex 11 pages, 3 figures | General Relativity and Gravitation, 44 (2012) 2257-2270 | 10.1007/s10714-012-1387-7 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the Randall-Sundrum model with one brane, we found the approximate and
exact solutions for gravitational potentials and accelerations of test bodies
in these potentials for different geometrical configurations. We applied these
formulas for calculation of the gravitational interaction between two spheres
and found... | [
{
"created": "Thu, 17 Nov 2011 10:09:01 GMT",
"version": "v1"
}
] | 2012-08-08 | [
[
"Eingorn",
"Maxim",
""
],
[
"Kudinova",
"Alexandra",
""
],
[
"Zhuk",
"Alexander",
""
]
] | In the Randall-Sundrum model with one brane, we found the approximate and exact solutions for gravitational potentials and accelerations of test bodies in these potentials for different geometrical configurations. We applied these formulas for calculation of the gravitational interaction between two spheres and found t... |
2112.11863 | Steffen Aksteiner | Steffen Aksteiner and Lars Andersson | Gravitational Instantons and special geometry | Revised version, corrected typos and added references | null | null | null | gr-qc math.DG | http://creativecommons.org/licenses/by/4.0/ | The Chen-Teo gravitational instanton is an asymptotically flat, toric, Ricci
flat family of metrics on $\mathbb{C}\mathbb{P}^2\setminus S^1$, that provides
a counterexample to the classical Euclidean Black Hole Uniqueness conjecture.
In this paper we show that the Chen-Teo instanton is Hermitian and
non-K\"ahler. It ... | [
{
"created": "Wed, 22 Dec 2021 13:18:52 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Jan 2022 12:29:37 GMT",
"version": "v2"
}
] | 2022-01-20 | [
[
"Aksteiner",
"Steffen",
""
],
[
"Andersson",
"Lars",
""
]
] | The Chen-Teo gravitational instanton is an asymptotically flat, toric, Ricci flat family of metrics on $\mathbb{C}\mathbb{P}^2\setminus S^1$, that provides a counterexample to the classical Euclidean Black Hole Uniqueness conjecture. In this paper we show that the Chen-Teo instanton is Hermitian and non-K\"ahler. It fo... |
1907.05714 | Muhammad Sharif | M. Sharif and Aisha Siddiqa | Propagation of Polar Gravitational Waves in f(R,T) Scenario | 18 pages, 1 figures | Gen. Relativ. Gravit. 51(2019)74 | 10.1007/s10714-019-2558-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper investigates the propagation of polar gravitational waves in the
spatially flat FRW universe consisting of a perfect fluid in the scenario of
$R+2\lambda T$ model of $f(R,T)$ gravity ($\lambda$ being the model parameter).
The spatially flat universe model is perturbed via Regge-Wheeler perturbations
induci... | [
{
"created": "Thu, 11 Jul 2019 11:42:51 GMT",
"version": "v1"
}
] | 2019-07-17 | [
[
"Sharif",
"M.",
""
],
[
"Siddiqa",
"Aisha",
""
]
] | This paper investigates the propagation of polar gravitational waves in the spatially flat FRW universe consisting of a perfect fluid in the scenario of $R+2\lambda T$ model of $f(R,T)$ gravity ($\lambda$ being the model parameter). The spatially flat universe model is perturbed via Regge-Wheeler perturbations inducing... |
gr-qc/0609025 | Jonn Miritzis | John Miritzis | The recollapse problem of closed isotropic models in second order
gravity theory | 9 pages, 1 figure. Talk given at the Eleventh Marcel Grossmann
Meeting on General Relativity, Berlin 2006 | null | null | null | gr-qc | null | We study the closed universe recollapse conjecture for positively curved
Friedmann-Robertson-Walker (FRW) models in the Jordan frame of the second order
gravity theory. We analyse the late time evolution of the model with the
methods of the dynamical systems. We find that an initially expanding closed
FRW universe, s... | [
{
"created": "Thu, 7 Sep 2006 15:25:51 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Miritzis",
"John",
""
]
] | We study the closed universe recollapse conjecture for positively curved Friedmann-Robertson-Walker (FRW) models in the Jordan frame of the second order gravity theory. We analyse the late time evolution of the model with the methods of the dynamical systems. We find that an initially expanding closed FRW universe, sta... |
gr-qc/9801105 | Alessandra Buonanno | Alessandra Buonanno, Thibault Damour | On the gravitational, dilatonic and axionic radiative damping of cosmic
strings | 48 pages, RevTex, epsfig, 1 figure; clarification of the domain of
validity of the perturbative derivation of the string equations of motion,
and of their renormalizability | Phys.Rev. D60 (1999) 023517 | 10.1103/PhysRevD.60.023517 | IHES/P/98/6 | gr-qc astro-ph hep-th | null | We study the radiation reaction on cosmic strings due to the emission of
dilatonic, gravitational and axionic waves. After verifying the (on average)
conservative nature of the time-symmetric self-interactions, we concentrate on
the finite radiation damping force associated with the half-retarded minus
half-advanced ... | [
{
"created": "Thu, 29 Jan 1998 18:29:15 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Mar 1998 18:06:18 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Jun 1999 19:11:43 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Buonanno",
"Alessandra",
""
],
[
"Damour",
"Thibault",
""
]
] | We study the radiation reaction on cosmic strings due to the emission of dilatonic, gravitational and axionic waves. After verifying the (on average) conservative nature of the time-symmetric self-interactions, we concentrate on the finite radiation damping force associated with the half-retarded minus half-advanced ``... |
1712.01159 | Pedro Bargueno | A. F. Vargas, E. Contreras and P. Bargue\~no | SAdS black holes and spacetime atoms: a heuristic approach | Accepted for publication in Gen. Rel. Grav | General Relativity and Gravitation (2018) 50:117 | 10.1007/s10714-018-2442-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, both extended phase space and holographic equipartition
approaches are employed to develop an exact Van der Waals description of
non--rotating $D=4$ SAdS black holes as an ensemble of spacetime atoms. After a
possible microscopical interaction model is introduced, statistical mechanics
techniques, with ... | [
{
"created": "Mon, 4 Dec 2017 15:51:57 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Aug 2018 18:11:29 GMT",
"version": "v2"
},
{
"created": "Fri, 24 Aug 2018 16:41:06 GMT",
"version": "v3"
}
] | 2018-08-27 | [
[
"Vargas",
"A. F.",
""
],
[
"Contreras",
"E.",
""
],
[
"Bargueño",
"P.",
""
]
] | In this work, both extended phase space and holographic equipartition approaches are employed to develop an exact Van der Waals description of non--rotating $D=4$ SAdS black holes as an ensemble of spacetime atoms. After a possible microscopical interaction model is introduced, statistical mechanics techniques, with ce... |
gr-qc/0611119 | Narit Pidokrajt | Jan E Aman, James Bedford, Daniel Grumiller, Narit Pidokrajt and John
Ward | Ruppeiner theory of black hole thermodynamics | 10 pages, 1 figure. Talk given by N Pidokrajt at ERE2006 in Palma de
Mallorca, Spain | J.Phys.Conf.Ser.66:012007,2007 | 10.1088/1742-6596/66/1/012007 | MIT-CTP 3787, QMUL-PH-06-09, USITP 06-04 | gr-qc hep-th | null | The Ruppeiner metric as determined by the Hessian of the Gibbs surface
provides a geometric description of thermodynamic systems in equilibrium. An
interesting example is a black hole in equilibrium with its own Hawking
radiation. In this article, we present results from the Ruppeiner study of
various black hole fami... | [
{
"created": "Wed, 22 Nov 2006 21:53:51 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Aman",
"Jan E",
""
],
[
"Bedford",
"James",
""
],
[
"Grumiller",
"Daniel",
""
],
[
"Pidokrajt",
"Narit",
""
],
[
"Ward",
"John",
""
]
] | The Ruppeiner metric as determined by the Hessian of the Gibbs surface provides a geometric description of thermodynamic systems in equilibrium. An interesting example is a black hole in equilibrium with its own Hawking radiation. In this article, we present results from the Ruppeiner study of various black hole famili... |
gr-qc/0502011 | Jiliang Jing | Jiliang Jing and Qiyuan Pan | Dirac quasinormal frequencies of Reissner-Nordstr\"om black hole in
Anti-de Sitter spacetime | 16 pages, 4 figures | Phys.Rev. D71 (2005) 124011 | 10.1103/PhysRevD.71.124011 | null | gr-qc astro-ph hep-th | null | The quasinormal modes (QNMs) of Dirac field perturbations of a
Reissner-Nordstr\"om black hole in an asymptotically Anti-de Sitter spacetime
are investigated. We find that both the real and imaginary parts of the
fundamental quasinormal frequencies for large black holes are the linear
functions of the Hawking tempera... | [
{
"created": "Thu, 3 Feb 2005 03:32:50 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Jing",
"Jiliang",
""
],
[
"Pan",
"Qiyuan",
""
]
] | The quasinormal modes (QNMs) of Dirac field perturbations of a Reissner-Nordstr\"om black hole in an asymptotically Anti-de Sitter spacetime are investigated. We find that both the real and imaginary parts of the fundamental quasinormal frequencies for large black holes are the linear functions of the Hawking temperatu... |
1407.2604 | Mohammad Reza Setare | M. R. Setare and V. Kamali | Cosmological perturbations in warm-tachyon inflationary universe model
with viscous pressure | 19 pages, 3 figures, accepted for publication in PLB (2014). arXiv
admin note: substantial text overlap with arXiv:1302.0493, arXiv:1312.2832 | null | 10.1016/j.physletb.2014.07.008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the warm-tachyon inflationary universe model with viscous pressure
in high-dissipation regime. General conditions which are required for this
model to be realizable are derived in the slow-roll approximation. We present
analytic expressions for density perturbation and amplitude of tensor
perturbation in lon... | [
{
"created": "Wed, 9 Jul 2014 10:58:15 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Setare",
"M. R.",
""
],
[
"Kamali",
"V.",
""
]
] | We study the warm-tachyon inflationary universe model with viscous pressure in high-dissipation regime. General conditions which are required for this model to be realizable are derived in the slow-roll approximation. We present analytic expressions for density perturbation and amplitude of tensor perturbation in longi... |
2203.00661 | Ernesto Contreras | Pio J. Arias, Pedro Bargue\~no, Ernesto Contreras, Ernesto Fuenmayor | $2+1$ Einstein-Klein-Gordon black holes by gravitational decoupling | null | Astronomy 1, 2 (2022) | 10.3390/astronomy1010002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study the 2+1 Einstein-Klein-Gordon system in the framework
of Gravitational Decoupling. We associate the generic matter decoupling sector
with a real scalar field so we can obtain a constraint which allows to close
the system of differential equations. The constraint corresponds to a
differential equ... | [
{
"created": "Tue, 1 Mar 2022 18:14:29 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Mar 2022 00:09:44 GMT",
"version": "v2"
}
] | 2022-03-07 | [
[
"Arias",
"Pio J.",
""
],
[
"Bargueño",
"Pedro",
""
],
[
"Contreras",
"Ernesto",
""
],
[
"Fuenmayor",
"Ernesto",
""
]
] | In this work we study the 2+1 Einstein-Klein-Gordon system in the framework of Gravitational Decoupling. We associate the generic matter decoupling sector with a real scalar field so we can obtain a constraint which allows to close the system of differential equations. The constraint corresponds to a differential equat... |
1905.00010 | Nils Andersson | N. Andersson and P. Pnigouras | The g-mode spectrum of reactive neutron star cores | 7 pages, 2 figures | null | 10.1093/mnras/stz2449 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the impact of nuclear reactions on the spectrum of gravity g-modes
of a mature neutron star, demonstrating the anticipated disappearance of these
modes when the timescale associated with the oscillations is longer than that
of nuclear reactions. This is the expected result, but different aspects of the
dem... | [
{
"created": "Tue, 30 Apr 2019 16:57:25 GMT",
"version": "v1"
}
] | 2019-09-25 | [
[
"Andersson",
"N.",
""
],
[
"Pnigouras",
"P.",
""
]
] | We discuss the impact of nuclear reactions on the spectrum of gravity g-modes of a mature neutron star, demonstrating the anticipated disappearance of these modes when the timescale associated with the oscillations is longer than that of nuclear reactions. This is the expected result, but different aspects of the demon... |
gr-qc/0402062 | Jorge Pullin | Rodolfo Gambini and Jorge Pullin | Canonical quantum gravity and consistent discretizations | 8 pages, to appear in Pramana | Pramana63:755-764,2004 | 10.1007/BF02705197 | LSU-REL-021304 | gr-qc | null | This is a summary of the talk presented by JP at ICGC2004. It covered some
developments in canonical quantum gravity occurred since ICGC2000, emphasizing
the recently introduced consistent discretizations of general relativity.
| [
{
"created": "Fri, 13 Feb 2004 16:49:30 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | This is a summary of the talk presented by JP at ICGC2004. It covered some developments in canonical quantum gravity occurred since ICGC2000, emphasizing the recently introduced consistent discretizations of general relativity. |
2112.01706 | Shao-Wen Wei | Shao-Wen Wei, Yu-Xiao Liu | Topology of black hole thermodynamics | 6 pages and 6 figures | Phys.Rev.D 105, 104003 (2022) | 10.1103/PhysRevD.105.104003 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | A critical point is an important structure in the phase diagram of a
thermodynamic system. In this work, we introduce topology to the study of the
black hole thermodynamics for the first time by following Duan's topological
current $\phi$-mapping theory. Each critical point is endowed with a
topological charge. We fi... | [
{
"created": "Fri, 3 Dec 2021 04:30:42 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Jan 2022 03:04:29 GMT",
"version": "v2"
},
{
"created": "Tue, 10 May 2022 08:27:12 GMT",
"version": "v3"
}
] | 2022-05-11 | [
[
"Wei",
"Shao-Wen",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | A critical point is an important structure in the phase diagram of a thermodynamic system. In this work, we introduce topology to the study of the black hole thermodynamics for the first time by following Duan's topological current $\phi$-mapping theory. Each critical point is endowed with a topological charge. We find... |
2206.08179 | Leanne Durkan | Leanne Durkan and Niels Warburton | Slow evolution of the metric perturbation due to a quasicircular
inspiral into a Schwarzschild black hole | 23 pages, (15 pages with appendices and references), 7 figures, 1
table | null | 10.1103/PhysRevD.106.084023 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | Extreme mass-ratio inspirals (EMRIs) are one of the most highly anticipated
sources of gravitational radiation novel to detection by millihertz space-based
detectors. To accurately estimate the parameters of EMRIs and perform precision
tests of general relativity, their models should incorporate self-force theory
thr... | [
{
"created": "Thu, 16 Jun 2022 13:45:39 GMT",
"version": "v1"
},
{
"created": "Thu, 18 May 2023 21:22:45 GMT",
"version": "v2"
}
] | 2023-05-22 | [
[
"Durkan",
"Leanne",
""
],
[
"Warburton",
"Niels",
""
]
] | Extreme mass-ratio inspirals (EMRIs) are one of the most highly anticipated sources of gravitational radiation novel to detection by millihertz space-based detectors. To accurately estimate the parameters of EMRIs and perform precision tests of general relativity, their models should incorporate self-force theory throu... |
2101.04060 | Souvik Ghose | Arindam Saha, Souvik Ghose, Anirban Chanda, Bikash Chandra Paul | R\' enyi Holographic Dark Energy in Higher Dimension Cosmology | 17 pages, 11 figures, Accepted for publication in Annals of Physics | null | 10.1016/j.aop.2021.168403 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | R\'enyi holographic dark energy (RHDE) correspondence is discussed in higher
dimensional cosmology, namely Kaluza-Klein (KK) cosmology. Both interacting and
non-interacting cosmological scenario are considered here. It is found that the
non-interacting model naturally leads to the late accelerated universe, unlike
th... | [
{
"created": "Mon, 11 Jan 2021 17:52:23 GMT",
"version": "v1"
}
] | 2021-01-22 | [
[
"Saha",
"Arindam",
""
],
[
"Ghose",
"Souvik",
""
],
[
"Chanda",
"Anirban",
""
],
[
"Paul",
"Bikash Chandra",
""
]
] | R\'enyi holographic dark energy (RHDE) correspondence is discussed in higher dimensional cosmology, namely Kaluza-Klein (KK) cosmology. Both interacting and non-interacting cosmological scenario are considered here. It is found that the non-interacting model naturally leads to the late accelerated universe, unlike the ... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.