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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0806.0402 | Sourav Sur | Saurya Das (Lethbridge U.), S. Shankaranarayanan (Portsmouth U., ICG),
Sourav Sur (Lethbridge U.) | Black hole entropy from entanglement: A review | Invited Review. To appear in the edited book: Classical and Quantum
Gravity Research Progress, Nova Publishers (2008).
https://www.novapublishers.com/catalog/product_info.php?products_id=9063 | Horizons in World Physics, Volume 268 (2009) Editors: Michael
Everett and Louis Pedroza | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review aspects of the thermodynamics of black holes and in particular take
into account the fact that the quantum entanglement between the degrees of
freedom of a scalar field, traced inside the event horizon, can be the origin
of black hole entropy. The main reason behind such a plausibility is that the
well-know... | [
{
"created": "Mon, 2 Jun 2008 22:48:05 GMT",
"version": "v1"
}
] | 2016-07-28 | [
[
"Das",
"Saurya",
"",
"Lethbridge U."
],
[
"Shankaranarayanan",
"S.",
"",
"Portsmouth U., ICG"
],
[
"Sur",
"Sourav",
"",
"Lethbridge U."
]
] | We review aspects of the thermodynamics of black holes and in particular take into account the fact that the quantum entanglement between the degrees of freedom of a scalar field, traced inside the event horizon, can be the origin of black hole entropy. The main reason behind such a plausibility is that the well-known ... |
2110.04867 | Giulia Gubitosi | Angel Ballesteros, Giulia Gubitosi, Flavio Mercati | Interplay between spacetime curvature, speed of light and quantum
deformations of relativistic symmetries | v2 matches the version accepted for publication. We added a few
references and comments, plus fixed some typos. v3 includes a few additional
references | Symmetry 2021, 13, 2099 | 10.3390/sym13112099 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent work showed that $\kappa$-deformations can describe the quantum
deformation of several relativistic models that have been proposed in the
context of quantum gravity phenomenology. Starting from the Poincar\'e algebra
of special-relativistic symmetries, one can toggle the curvature parameter
$\Lambda$, the Plan... | [
{
"created": "Sun, 10 Oct 2021 17:57:57 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Nov 2021 19:10:54 GMT",
"version": "v2"
},
{
"created": "Sun, 23 Jan 2022 19:12:12 GMT",
"version": "v3"
}
] | 2022-02-01 | [
[
"Ballesteros",
"Angel",
""
],
[
"Gubitosi",
"Giulia",
""
],
[
"Mercati",
"Flavio",
""
]
] | Recent work showed that $\kappa$-deformations can describe the quantum deformation of several relativistic models that have been proposed in the context of quantum gravity phenomenology. Starting from the Poincar\'e algebra of special-relativistic symmetries, one can toggle the curvature parameter $\Lambda$, the Planck... |
1203.5212 | Alexander Gorbatsievich | Alexander Gorbatsievich and Ernst Schmutzer | Field Equations and Equations of Motion in Post-Newtonian Approximation
of the Projective Unified Field Theory | 17 pages | International Journal of Modern Physics E (IJMPE), Volume: 21,
Issue: 2(2012) 1250012 | 10.1142/S0218301312500127 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The equations of motion of $N$ gravitationally bound bodies are derived from
the field equations of Projective Unified Field Theory. The Newtonian and the
post-Newtonian approximations of the field equations and of the equations of
motion of this system of bodies are studied in detail. In analyzing some
experimental ... | [
{
"created": "Fri, 23 Mar 2012 11:08:32 GMT",
"version": "v1"
},
{
"created": "Thu, 17 May 2012 10:29:55 GMT",
"version": "v2"
}
] | 2012-05-18 | [
[
"Gorbatsievich",
"Alexander",
""
],
[
"Schmutzer",
"Ernst",
""
]
] | The equations of motion of $N$ gravitationally bound bodies are derived from the field equations of Projective Unified Field Theory. The Newtonian and the post-Newtonian approximations of the field equations and of the equations of motion of this system of bodies are studied in detail. In analyzing some experimental da... |
2105.13658 | Nikolaos Dimakis | Theodoros Pailas, N. Dimakis, Petros A. Terzis and Theodosios
Christodoulakis | Time-covariant Schr\"{o}dinger equation and invariant decay probability:
The $\Lambda$-Kantowski-Sachs universe | Latex2e source file, 21 pages, no figures, minor changes to match
published version | null | 10.1140/epjc/s10052-021-09866-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The system under study is the $\Lambda$-Kantowski-Sachs universe. Its
canonical quantization is provided based on a recently developed method: the
singular minisuperspace Lagrangian describing the system, is reduced to a
regular (by inserting into the dynamical equations the lapse dictated by the
quadratic constraint... | [
{
"created": "Fri, 28 May 2021 08:09:35 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Nov 2021 02:51:02 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Dec 2021 08:43:00 GMT",
"version": "v3"
}
] | 2021-12-22 | [
[
"Pailas",
"Theodoros",
""
],
[
"Dimakis",
"N.",
""
],
[
"Terzis",
"Petros A.",
""
],
[
"Christodoulakis",
"Theodosios",
""
]
] | The system under study is the $\Lambda$-Kantowski-Sachs universe. Its canonical quantization is provided based on a recently developed method: the singular minisuperspace Lagrangian describing the system, is reduced to a regular (by inserting into the dynamical equations the lapse dictated by the quadratic constraint) ... |
1704.08794 | Jiliang Jing | Jiliang Jing, Songbai Chen, Qiyuan Pan, Jieci Wang | Detect black holes using photons for coupling model of electromagnetic
and gravitational fields | 15 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For a model of the electromagnetic field coupled to Weyl tensor, Maxwell
equations are modified and photons at low frequencies no longer propagate along
light cone. If we detect a black hole using these photons, some difficulties
appear because we can not determine the position of event horizon which is
defined by nu... | [
{
"created": "Fri, 28 Apr 2017 02:57:44 GMT",
"version": "v1"
}
] | 2017-05-01 | [
[
"Jing",
"Jiliang",
""
],
[
"Chen",
"Songbai",
""
],
[
"Pan",
"Qiyuan",
""
],
[
"Wang",
"Jieci",
""
]
] | For a model of the electromagnetic field coupled to Weyl tensor, Maxwell equations are modified and photons at low frequencies no longer propagate along light cone. If we detect a black hole using these photons, some difficulties appear because we can not determine the position of event horizon which is defined by null... |
1205.3929 | Ran Li | Ran Li | Superradiant instability of charged massive scalar field in
Kerr-Newman-anti-de Sitter black hole | 13 pages, no figure, comments are welcome! Revised version accepted
by PLB | Phys. Lett. B 714 (2012) 337-341 | 10.1016/j.physletb.2012.07.015 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the superradiance instability of charged massive scalar field in the
background of Kerr-Newman-anti-de Sitter black hole. By employing the
asymptotic matching technique to solve Klein-Gordon equation analytically, the
complex parts of quasinormal frequencies are shown to be positive in the regime
of superrad... | [
{
"created": "Thu, 17 May 2012 13:42:53 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Jul 2012 01:00:26 GMT",
"version": "v2"
}
] | 2012-07-31 | [
[
"Li",
"Ran",
""
]
] | We study the superradiance instability of charged massive scalar field in the background of Kerr-Newman-anti-de Sitter black hole. By employing the asymptotic matching technique to solve Klein-Gordon equation analytically, the complex parts of quasinormal frequencies are shown to be positive in the regime of superradia... |
2012.03416 | Daniel Flores | Daniel Flores-Alfonso, Rom\'an Linares, Marco Maceda | Nonlinear extensions of gravitating dyons: from NUT wormholes to
Taub-Bolt instantons | null | JHEP 09 (2021) 104 | 10.1007/JHEP09(2021)104 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Recent work has shown the existence of a unique nonlinear extension of
electromagnetism which preserves conformal symmetry and allows for the freedom
of duality rotations. Moreover, black holes and gravitational waves have been
found to exist in this nonlinearly extended electrovacuum. We generalise these
dyonic blac... | [
{
"created": "Mon, 7 Dec 2020 02:10:49 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Jul 2021 00:35:00 GMT",
"version": "v2"
},
{
"created": "Sat, 18 Sep 2021 04:10:02 GMT",
"version": "v3"
}
] | 2021-09-21 | [
[
"Flores-Alfonso",
"Daniel",
""
],
[
"Linares",
"Román",
""
],
[
"Maceda",
"Marco",
""
]
] | Recent work has shown the existence of a unique nonlinear extension of electromagnetism which preserves conformal symmetry and allows for the freedom of duality rotations. Moreover, black holes and gravitational waves have been found to exist in this nonlinearly extended electrovacuum. We generalise these dyonic black ... |
1911.05459 | Masoud Ghezelbash | M. F. A. R. Sakti, A. M. Ghezelbash, A. Suroso, F. P. Zen | Deformed conformal symmetry of Kerr-Newman-NUT-AdS black holes | 19 pages | Gen. Relativ. Gravit. (2019) 51:151 | 10.1007/s10714-019-2641-z | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find generators of the conformal symmetry for the class of
Kerr-Newman-NUT-AdS black holes from the deformed scalar probe equation. We
find two classes of solutions for the generators (also known as conformal J and
Q pictures). The two classes of deformed generators are the extension of
similar generators for the ... | [
{
"created": "Wed, 13 Nov 2019 13:48:54 GMT",
"version": "v1"
}
] | 2020-01-06 | [
[
"Sakti",
"M. F. A. R.",
""
],
[
"Ghezelbash",
"A. M.",
""
],
[
"Suroso",
"A.",
""
],
[
"Zen",
"F. P.",
""
]
] | We find generators of the conformal symmetry for the class of Kerr-Newman-NUT-AdS black holes from the deformed scalar probe equation. We find two classes of solutions for the generators (also known as conformal J and Q pictures). The two classes of deformed generators are the extension of similar generators for the re... |
2401.04467 | Chao Zhang | Chao Zhang, Guoyang Fu and Ning Dai | Detecting dark matter with extreme mass-ratio inspirals | 17 pages, 5 figures, 2 tables; comments are welcome | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extreme mass ratio inspirals (EMRIs), where a small compact object inspiralls
onto a supermassive black hole, are excellent sources for the space-based laser
interferometer gravitational wave (GW) detectors. The presence of dark matter
surrounding the supermassive black hole will influence the binary orbital
evolutio... | [
{
"created": "Tue, 9 Jan 2024 10:08:38 GMT",
"version": "v1"
}
] | 2024-01-10 | [
[
"Zhang",
"Chao",
""
],
[
"Fu",
"Guoyang",
""
],
[
"Dai",
"Ning",
""
]
] | Extreme mass ratio inspirals (EMRIs), where a small compact object inspiralls onto a supermassive black hole, are excellent sources for the space-based laser interferometer gravitational wave (GW) detectors. The presence of dark matter surrounding the supermassive black hole will influence the binary orbital evolution ... |
2010.01399 | David Garfinkle | David Garfinkle and Frans Pretorius | Spike behavior in the approach to spacetime singularities | null | Phys. Rev. D 102, 124067 (2020) | 10.1103/PhysRevD.102.124067 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform numerical simulations of the approach to spacetime singularities.
The simulations are done with sufficient resolution to resolve the small scale
features (known as spikes) that form in this process. We find an analytical
formula for the shape of the spikes and show that the spikes in the simulations
are we... | [
{
"created": "Sat, 3 Oct 2020 17:48:13 GMT",
"version": "v1"
}
] | 2021-01-04 | [
[
"Garfinkle",
"David",
""
],
[
"Pretorius",
"Frans",
""
]
] | We perform numerical simulations of the approach to spacetime singularities. The simulations are done with sufficient resolution to resolve the small scale features (known as spikes) that form in this process. We find an analytical formula for the shape of the spikes and show that the spikes in the simulations are well... |
gr-qc/9505046 | Paula Bozzay | E. Calzetta and B. L. Hu | Quantum Fluctuations, Decoherence of the Mean Field, and Structure
Formation in the Early Universe | 35 pages, latex, 0 figures | Phys.Rev.D52:6770-6788,1995 | 10.1103/PhysRevD.52.6770 | IASSNS-HEP-95/38 | gr-qc | null | We examine from first principles one of the basic assumptions of modern
quantum theories of structure formation in the early universe, i.e., the
conditions upon which fluctuations of a quantum field may transmute into
classical stochastic perturbations, which grew into galaxies. Our earlier works
have discussed the q... | [
{
"created": "Wed, 24 May 1995 18:05:00 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Calzetta",
"E.",
""
],
[
"Hu",
"B. L.",
""
]
] | We examine from first principles one of the basic assumptions of modern quantum theories of structure formation in the early universe, i.e., the conditions upon which fluctuations of a quantum field may transmute into classical stochastic perturbations, which grew into galaxies. Our earlier works have discussed the qua... |
0903.3256 | Ricardo Monteiro | Ricardo Monteiro, Malcolm J. Perry, Jorge E. Santos | Thermodynamic instability of rotating black holes | 36 pages, 11 figures; v2: corrections to match published version | Phys.Rev.D80:024041,2009 | 10.1103/PhysRevD.80.024041 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the quasi-Euclidean sections of various rotating black holes in
different dimensions possess at least one non-conformal negative mode when
thermodynamic instabilities are expected. The boundary conditions of fixed
induced metric correspond to the partition function of the grand-canonical
ensemble. Indeed... | [
{
"created": "Wed, 18 Mar 2009 23:39:53 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Jul 2009 17:52:52 GMT",
"version": "v2"
}
] | 2010-04-14 | [
[
"Monteiro",
"Ricardo",
""
],
[
"Perry",
"Malcolm J.",
""
],
[
"Santos",
"Jorge E.",
""
]
] | We show that the quasi-Euclidean sections of various rotating black holes in different dimensions possess at least one non-conformal negative mode when thermodynamic instabilities are expected. The boundary conditions of fixed induced metric correspond to the partition function of the grand-canonical ensemble. Indeed, ... |
1901.07545 | Vladimir Dzhunushaliev | Vladimir Dzhunushaliev, Vladimir Folomeev, Burkhard Kleihaus and Jutta
Kunz | Thin-shell toroidal wormhole | 7 pages, 1 figure | Phys. Rev. D 99, 044031 (2019) | 10.1103/PhysRevD.99.044031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a topologically nontrivial thin-shell wormhole with a throat in
the form of a $T^2$ torus. It is shown that: (i)~such a wormhole is stable with
respect to excitations of the throat; (ii)~not all energy conditions are
violated for such wormholes; (iii)~if any of the energy conditions is violated,
this viol... | [
{
"created": "Tue, 22 Jan 2019 05:58:28 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Jan 2019 11:02:21 GMT",
"version": "v2"
}
] | 2019-02-27 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
]
] | We consider a topologically nontrivial thin-shell wormhole with a throat in the form of a $T^2$ torus. It is shown that: (i)~such a wormhole is stable with respect to excitations of the throat; (ii)~not all energy conditions are violated for such wormholes; (iii)~if any of the energy conditions is violated, this violat... |
0906.3315 | Fernando P. Devecchi | L. L. Samojeden, G. M. Kremer and F. P. Devecchi | Accelerated expansion in bosonic and fermionic 2D cosmologies with
quantum effects | 6 pages, 5 figures, to appear in EPL | Europhys.Lett.87:10001,2009 | 10.1209/0295-5075/87/10001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we analyze the effects produced by bosonic and fermionic
constituents, including quantum corrections, in two-dimensional (2D)
cosmological models. We focus on a gravitational theory related to the
Callan-Giddings-Harvey-Strominger model, to simulate the dynamics of a young,
spatially-lineal, universe. Th... | [
{
"created": "Wed, 17 Jun 2009 21:40:47 GMT",
"version": "v1"
}
] | 2009-08-07 | [
[
"Samojeden",
"L. L.",
""
],
[
"Kremer",
"G. M.",
""
],
[
"Devecchi",
"F. P.",
""
]
] | In this work we analyze the effects produced by bosonic and fermionic constituents, including quantum corrections, in two-dimensional (2D) cosmological models. We focus on a gravitational theory related to the Callan-Giddings-Harvey-Strominger model, to simulate the dynamics of a young, spatially-lineal, universe. The ... |
1711.06255 | Sergey Yu. Vernov | E.O. Pozdeeva and S.Yu. Vernov | Induced gravity models with exact bounce solutions | 6 pages | Phys. Part. Nuclei 49 (2018) 914 | 10.1134/S1063779618050337 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study dynamics of induced gravity cosmological models with the sixth
degree polynomial potentials, that have been constructed using the
superpotential method. We find conditions on the potential under which exact
bounce solutions exist and study the stability of these solutions.
| [
{
"created": "Thu, 16 Nov 2017 18:57:23 GMT",
"version": "v1"
}
] | 2018-10-22 | [
[
"Pozdeeva",
"E. O.",
""
],
[
"Vernov",
"S. Yu.",
""
]
] | We study dynamics of induced gravity cosmological models with the sixth degree polynomial potentials, that have been constructed using the superpotential method. We find conditions on the potential under which exact bounce solutions exist and study the stability of these solutions. |
1411.5486 | Christian Boehmer | Christian G. Boehmer, Matthew Wright | Slowly rotating perfect fluids with a cosmological constant | 19 pages, 2 figures | General Relativity and Gravitation 47 (2015) 143 | 10.1007/s10714-015-1982-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hartle's slow rotation formalism is developed in the presence of a
cosmological constant. We find the generalisation of the Hartle-Thorne vacuum
metric, the Hartle-Thorne-(anti)-de Sitter metric, and find that it is always
asymptotically (anti)-de Sitter. Next we consider Wahlquist's rotating perfect
fluid interior s... | [
{
"created": "Thu, 20 Nov 2014 10:07:55 GMT",
"version": "v1"
}
] | 2015-11-12 | [
[
"Boehmer",
"Christian G.",
""
],
[
"Wright",
"Matthew",
""
]
] | Hartle's slow rotation formalism is developed in the presence of a cosmological constant. We find the generalisation of the Hartle-Thorne vacuum metric, the Hartle-Thorne-(anti)-de Sitter metric, and find that it is always asymptotically (anti)-de Sitter. Next we consider Wahlquist's rotating perfect fluid interior sol... |
1805.06673 | Kaushik Bhattacharya | Pritha Bari, Kaushik Bhattacharya, Saikat Chakraborty | Early universe cosmological solutions in exponential gravity | 22 pages, 20 figures. Some new material on cosmological perturbation
is added and the introduction section has slightly been modified. Some new
figures are included. Accepted for publication in the special issue on
"Bounce Cosmology" in Universe-Open Access Journal of Theoretical Physics.
arXiv admin note: text... | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we present some cosmologically relevant solutions using the
spatially flat Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime in metric
$f(R)$ gravity where the form of the gravitational Lagrangian is given by
$\frac{1}{\alpha}e^{\alpha R}$. In the low curvature limit this theory reduces
to ordinary Ei... | [
{
"created": "Thu, 17 May 2018 09:49:48 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Oct 2018 13:23:02 GMT",
"version": "v2"
}
] | 2018-10-17 | [
[
"Bari",
"Pritha",
""
],
[
"Bhattacharya",
"Kaushik",
""
],
[
"Chakraborty",
"Saikat",
""
]
] | In this work we present some cosmologically relevant solutions using the spatially flat Friedmann-Lemaitre-Robertson-Walker (FLRW) spacetime in metric $f(R)$ gravity where the form of the gravitational Lagrangian is given by $\frac{1}{\alpha}e^{\alpha R}$. In the low curvature limit this theory reduces to ordinary Eins... |
2107.06934 | Surajit Kalita | Surajit Kalita | Timescales for Detecting Magnetized White Dwarfs in Gravitational Wave
Astronomy | 6 pages with 4 figures; published in the proceedings of 1st
Electronic Conference on Universe, 22-28 February 2021 | Physical Sciences Forum (2021) 2(1), 12 | 10.3390/ECU2021-09310 | null | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Over the past couple of decades, researchers have predicted more than a dozen
super-Chandrasekhar white dwarfs from the detections of over-luminous type Ia
supernovae. It turns out that magnetic fields and rotation can explain such
massive white dwarfs. If these rotating magnetized white dwarfs follow specific
condit... | [
{
"created": "Wed, 14 Jul 2021 18:37:45 GMT",
"version": "v1"
}
] | 2021-07-19 | [
[
"Kalita",
"Surajit",
""
]
] | Over the past couple of decades, researchers have predicted more than a dozen super-Chandrasekhar white dwarfs from the detections of over-luminous type Ia supernovae. It turns out that magnetic fields and rotation can explain such massive white dwarfs. If these rotating magnetized white dwarfs follow specific conditio... |
0809.0304 | Juan Manuel Garcia-Islas | J.Manuel Garcia-Islas | Towards a spin foam model description of black hole entropy | 5 pages, 1 figure | Class.Quant.Grav.25:238001,2008 | 10.1088/0264-9381/25/23/238001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a way to describe the origin of black hole entropy in the spin
foam models of quantum gravity. This stimulates a new way to study the relation
of spin foam models and loop quantum gravity.
| [
{
"created": "Mon, 1 Sep 2008 19:36:18 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Garcia-Islas",
"J. Manuel",
""
]
] | We propose a way to describe the origin of black hole entropy in the spin foam models of quantum gravity. This stimulates a new way to study the relation of spin foam models and loop quantum gravity. |
1901.04128 | Ming Zhang | Ming Zhang | Interior Volume of Banados-Teitelboim-Zanelli Black Hole | 6 pages | null | 10.1016/j.physletb.2019.01.032 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We calculate the interior volume for the three-dimensional
Banados-Teitelboim-Zanelli black hole in this paper. To that end, we obtain the
volume functional and numerically find a path to extremize it, before choosing
a spacelike hypersurface to get an asymptotic analytical expression for the
interior volume based on... | [
{
"created": "Mon, 14 Jan 2019 04:55:42 GMT",
"version": "v1"
}
] | 2019-01-23 | [
[
"Zhang",
"Ming",
""
]
] | We calculate the interior volume for the three-dimensional Banados-Teitelboim-Zanelli black hole in this paper. To that end, we obtain the volume functional and numerically find a path to extremize it, before choosing a spacelike hypersurface to get an asymptotic analytical expression for the interior volume based on t... |
2305.05793 | Daniel Oliver | Daniel J Oliver, Aaron D Johnson, Joel Berrier, Kostas Glampedakis,
Daniel Kennefick | Gravitational Wave Peeps from EMRIs and their Implication for LISA
Signal Confusion Noise | 18 pages, 13 figures | null | null | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scattering events around a supermassive black hole will occasionally toss a
stellar-mass compact object into an orbit around the supermassive black hole,
beginning an extreme mass ratio inspiral. The early stages of such a highly
eccentric orbit will not produce detectable gravitational waves as the source
will only ... | [
{
"created": "Tue, 9 May 2023 22:56:16 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Aug 2023 18:29:55 GMT",
"version": "v2"
}
] | 2023-08-31 | [
[
"Oliver",
"Daniel J",
""
],
[
"Johnson",
"Aaron D",
""
],
[
"Berrier",
"Joel",
""
],
[
"Glampedakis",
"Kostas",
""
],
[
"Kennefick",
"Daniel",
""
]
] | Scattering events around a supermassive black hole will occasionally toss a stellar-mass compact object into an orbit around the supermassive black hole, beginning an extreme mass ratio inspiral. The early stages of such a highly eccentric orbit will not produce detectable gravitational waves as the source will only be... |
gr-qc/9803057 | Kristen Menou | Kristen Menou, Eliot Quataert, Ramesh Narayan (Harvard-Smithsonian
Center for Astrophysics) | Astrophysical Evidence for Black Hole Event Horizons | LateX, 23 pages, 7 figures, uses crckapb.sty. To appear in the
Proceedings of the GR15 meeting, eds. N K Dadhich & J V Narlikar | null | null | EFI-94-11 | gr-qc | null | Astronomers have discovered many potential black holes in X-ray binaries and
galactic nuclei. These black holes are usually identified by the fact that they
are too massive to be neutron stars. Until recently, however, there was no
convincing evidence that the objects identified as black hole candidates
actually have... | [
{
"created": "Mon, 16 Mar 1998 16:27:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Menou",
"Kristen",
"",
"Harvard-Smithsonian\n Center for Astrophysics"
],
[
"Quataert",
"Eliot",
"",
"Harvard-Smithsonian\n Center for Astrophysics"
],
[
"Narayan",
"Ramesh",
"",
"Harvard-Smithsonian\n Center for Astrophysics"
]
] | Astronomers have discovered many potential black holes in X-ray binaries and galactic nuclei. These black holes are usually identified by the fact that they are too massive to be neutron stars. Until recently, however, there was no convincing evidence that the objects identified as black hole candidates actually have e... |
1905.12129 | Milko Estrada | Milko Estrada | A way of decoupling gravitational sources in pure Lovelock gravity | Accepted for publication in Eur.Phys.J.C | Eur. Phys. J. C (2019) 79: 918 | 10.1140/epjc/s10052-019-7444-6 | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | We provide an algorithm that shows how to decouple gravitational sources in
Pure Lovelock gravity. This method allows to obtain several new and known
analytic solutions of physical interest in scenarios with extra dimensions and
with presence of higher curvature terms. Furthermore, using our method, it is
shown that ... | [
{
"created": "Tue, 28 May 2019 23:13:04 GMT",
"version": "v1"
},
{
"created": "Fri, 31 May 2019 01:19:25 GMT",
"version": "v2"
},
{
"created": "Wed, 24 Jul 2019 17:58:24 GMT",
"version": "v3"
},
{
"created": "Wed, 30 Oct 2019 14:26:18 GMT",
"version": "v4"
}
] | 2019-11-13 | [
[
"Estrada",
"Milko",
""
]
] | We provide an algorithm that shows how to decouple gravitational sources in Pure Lovelock gravity. This method allows to obtain several new and known analytic solutions of physical interest in scenarios with extra dimensions and with presence of higher curvature terms. Furthermore, using our method, it is shown that ap... |
gr-qc/0112034 | Sanjay M. Wagh | S. M. Wagh, R. V. Saraykar, P. S. Muktibodh and K. S. Govinder | Spherical Gravitational Collapse with Heat Flux and Cosmic Censorship | Submitted to General Relativity and Gravitation | null | null | null | gr-qc | null | In this paper, we investigate the nature of the singularity in the
spherically symmetrical, shear-free, gravitational collapse of a star with heat
flux using a separable metric [cqg1]. For any non-singular, regular, radial
density profile for a star described by this metric, eq. (2.1), the singularity
of the gravitat... | [
{
"created": "Sun, 16 Dec 2001 03:47:18 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wagh",
"S. M.",
""
],
[
"Saraykar",
"R. V.",
""
],
[
"Muktibodh",
"P. S.",
""
],
[
"Govinder",
"K. S.",
""
]
] | In this paper, we investigate the nature of the singularity in the spherically symmetrical, shear-free, gravitational collapse of a star with heat flux using a separable metric [cqg1]. For any non-singular, regular, radial density profile for a star described by this metric, eq. (2.1), the singularity of the gravitatio... |
1201.4598 | Abhay Ashtekar | Abhay Ashtekar | Introduction to Loop Quantum Gravity | 30 pages, 2 figures. arXiv admin note: substantial text overlap with
arXiv:gr-qc/0410054 | null | 10.1007/978-3-642-33036-0_2 | IGC/12/1-5 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article is based on the opening lecture at the third quantum geometry
and quantum gravity school sponsored by the European Science Foundation and
held at Zakopane, Poland in March 2011. The goal of the lecture was to present
a broad perspective on loop quantum gravity for young researchers. The first
part is add... | [
{
"created": "Sun, 22 Jan 2012 20:46:13 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Ashtekar",
"Abhay",
""
]
] | This article is based on the opening lecture at the third quantum geometry and quantum gravity school sponsored by the European Science Foundation and held at Zakopane, Poland in March 2011. The goal of the lecture was to present a broad perspective on loop quantum gravity for young researchers. The first part is addre... |
2009.01999 | Marcus Khuri | Marcus Khuri, Gilbert Weinstein, Sumio Yamada | 5-Dimensional Space-Periodic Solutions of the Static Vacuum Einstein
Equations | 16 pages | J. High Energy Phys. (2020), no. 12, Art. 2 | 10.1007/JHEP12(2020)002 | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An affirmative answer is given to a conjecture of Myers concerning the
existence of 5-dimensional regular static vacuum solutions that balance an
infinite number of black holes, which have Kasner asymptotics. A variety of
examples are constructed, having different combinations of ring $S^1\times S^2$
and sphere $S^3$... | [
{
"created": "Fri, 4 Sep 2020 03:58:52 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Jan 2022 19:23:51 GMT",
"version": "v2"
}
] | 2022-02-01 | [
[
"Khuri",
"Marcus",
""
],
[
"Weinstein",
"Gilbert",
""
],
[
"Yamada",
"Sumio",
""
]
] | An affirmative answer is given to a conjecture of Myers concerning the existence of 5-dimensional regular static vacuum solutions that balance an infinite number of black holes, which have Kasner asymptotics. A variety of examples are constructed, having different combinations of ring $S^1\times S^2$ and sphere $S^3$ c... |
gr-qc/0004073 | Gennadii Varzugin | G. G. Varzugin | Equilibrium Configuration of Black Holes and the Inverse Scattering
Method | LaTeX, 14 pages, no figures | Theor.Math.Phys.111:667,1997; Teor.Mat.Fiz.111:345-355,1997 | 10.1007/BF02634055 | null | gr-qc | null | The inverse scattering method is applied to the investigation of the
equilibrium configuration of black holes. A study of the boundary problem
corresponding to this configuration shows that any axially symmetric,
stationary solution of the Einstein equations with disconnected event horizon
must belong to the class of... | [
{
"created": "Mon, 24 Apr 2000 21:58:21 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Varzugin",
"G. G.",
""
]
] | The inverse scattering method is applied to the investigation of the equilibrium configuration of black holes. A study of the boundary problem corresponding to this configuration shows that any axially symmetric, stationary solution of the Einstein equations with disconnected event horizon must belong to the class of B... |
0708.1595 | Laurent Freidel | Laurent Freidel and Kirill Krasnov | A New Spin Foam Model for 4d Gravity | 40 pages; (v2) published version | Class.Quant.Grav.25:125018,2008 | 10.1088/0264-9381/25/12/125018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from Plebanski formulation of gravity as a constrained BF theory we
propose a new spin foam model for 4d Riemannian quantum gravity that
generalises the well-known Barrett-Crane model and resolves the inherent to it
ultra-locality problem. The BF formulation of 4d gravity possesses two sectors:
gravitational... | [
{
"created": "Mon, 13 Aug 2007 14:05:22 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Jun 2008 11:25:43 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Freidel",
"Laurent",
""
],
[
"Krasnov",
"Kirill",
""
]
] | Starting from Plebanski formulation of gravity as a constrained BF theory we propose a new spin foam model for 4d Riemannian quantum gravity that generalises the well-known Barrett-Crane model and resolves the inherent to it ultra-locality problem. The BF formulation of 4d gravity possesses two sectors: gravitational a... |
gr-qc/0402049 | Johan Noldus | Luca Bombelli, Johan Noldus | The moduli space of isometry classes of globally hyperbolic spacetimes | 29 pages, 9 figures, submitted to Class. Quant. Grav | Class.Quant.Grav. 21 (2004) 4429-4454 | 10.1088/0264-9381/21/18/010 | null | gr-qc | null | This is the last article in a series of three initiated by the second author.
We elaborate on the concepts and theorems constructed in the previous articles.
In particular, we prove that the GH and the GGH uniformities previously
introduced on the moduli space of isometry classes of globally hyperbolic
spacetimes are... | [
{
"created": "Wed, 11 Feb 2004 10:06:40 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Bombelli",
"Luca",
""
],
[
"Noldus",
"Johan",
""
]
] | This is the last article in a series of three initiated by the second author. We elaborate on the concepts and theorems constructed in the previous articles. In particular, we prove that the GH and the GGH uniformities previously introduced on the moduli space of isometry classes of globally hyperbolic spacetimes are d... |
2003.08908 | Christof Wetterich | C. Wetterich | Primordial flat frame -- a new view on inflation | additional discussion of inhomogeneous cosmological solutions and big
bang singularity , 31 pages | null | 10.1103/PhysRevD.104.083525 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Models of inflationary cosmology admit a choice of the metric for which the
geometry of homogeneous isotropic solutions becomes flat Minkowski space in the
infinite past. In this primordial flat frame all mass scales vanish in the
infinite past and quantum scale symmetry is realized. The cosmological
evolution is dom... | [
{
"created": "Thu, 19 Mar 2020 17:15:41 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Jul 2020 12:24:28 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Jan 2021 13:49:38 GMT",
"version": "v3"
},
{
"created": "Sun, 19 Sep 2021 17:17:32 GMT",
"version": "v4"
}
] | 2021-10-27 | [
[
"Wetterich",
"C.",
""
]
] | Models of inflationary cosmology admit a choice of the metric for which the geometry of homogeneous isotropic solutions becomes flat Minkowski space in the infinite past. In this primordial flat frame all mass scales vanish in the infinite past and quantum scale symmetry is realized. The cosmological evolution is domin... |
gr-qc/9303020 | Don N. Page | Don N. Page | Clock Time and Entropy | 14 pages, plain TeX, report Alberta-Thy-12-93, To be published in
{\it Physical Origins of Time Asymmetry,} Eds. J. J. Halliwell, J.
Perez-Mercader, and W. H. \.Zurek, Cambridge University Press, Cambridge
(1993) | null | null | null | gr-qc | null | Testable conditional probabilities appear to be restricted to single
hypersurfaces (marvelous moments) and depend only on stationary observables.
Observable evolution, such as a change of entropy, should be expressed as a
dependence upon clock time, not upon inaccessible coordinate time.
| [
{
"created": "Fri, 12 Mar 1993 22:09:05 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Mar 1993 22:33:24 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Page",
"Don N.",
""
]
] | Testable conditional probabilities appear to be restricted to single hypersurfaces (marvelous moments) and depend only on stationary observables. Observable evolution, such as a change of entropy, should be expressed as a dependence upon clock time, not upon inaccessible coordinate time. |
1305.4193 | Yasusada Nambu | Yasusada Nambu | Entanglement Structure in Expanding Universes | 29 pages. arXiv admin note: text overlap with arXiv:1105.5212 | Entropy 2013, 15(3) 1847-1874 | 10.3390/e15051847 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate entanglement of a quantum field in de Sitter spacetime using a
particle detector model. By considering the entanglement between two comoving
detectors interacting with a scalar field, it is possible to detect the
entanglement of the scalar field by swapping it to detectors. For the massless
minimal sca... | [
{
"created": "Fri, 17 May 2013 21:15:02 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Nambu",
"Yasusada",
""
]
] | We investigate entanglement of a quantum field in de Sitter spacetime using a particle detector model. By considering the entanglement between two comoving detectors interacting with a scalar field, it is possible to detect the entanglement of the scalar field by swapping it to detectors. For the massless minimal scala... |
gr-qc/0506010 | Anzhong Wang | Anzhong Wang and Yumei Wu | Kink Stability of Self-Similar Solutions of Scalar Field in 2+1 Gravity | latex, one figure | Gen.Rel.Grav.39:663-676,2007; Gen.Rel.Grav.39:677-684,2007 | 10.1007/s10714-007-0413-7 | null | gr-qc | null | The kink stability of self-similar solutions of a massless scalar field with
circular symmetry in 2+1 gravity is studied, and found that such solutions are
unstable against the kink perturbations along the sonic line (self-similar
horizon). However, when perturbations outside the sonic line are considered,
and taking... | [
{
"created": "Wed, 1 Jun 2005 20:05:18 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Wang",
"Anzhong",
""
],
[
"Wu",
"Yumei",
""
]
] | The kink stability of self-similar solutions of a massless scalar field with circular symmetry in 2+1 gravity is studied, and found that such solutions are unstable against the kink perturbations along the sonic line (self-similar horizon). However, when perturbations outside the sonic line are considered, and taking t... |
gr-qc/9409051 | Dr. Scott C. Smith | Scott C. Smith, Joan M. Centrella, and Sean P. Clancy | A Three-Dimensional Hydrodynamics Code for Modeling Sources of
Gravitational Radiation | 51 pages, LaTeX with AASTEX macros, 12 figures available - send fax
number or surface address to scott@eagle.drexel.edu. ApJ Supp. (in press) | ApJS 94 (1994) 789 | 10.1086/192090 | null | gr-qc astro-ph | null | We have developed a 3-D Eulerian hydrodynamics code to model sources of
gravitational radiation. The code is written in cylindrical coordinates
$(\varpi,z,\varphi)$ and has moving grids in the $\varpi$ and $z$-directions.
We use Newtonian gravity and calculate the gravitational radiation in the
quadrupole approximati... | [
{
"created": "Fri, 23 Sep 1994 16:51:45 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Sep 1994 14:53:17 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Smith",
"Scott C.",
""
],
[
"Centrella",
"Joan M.",
""
],
[
"Clancy",
"Sean P.",
""
]
] | We have developed a 3-D Eulerian hydrodynamics code to model sources of gravitational radiation. The code is written in cylindrical coordinates $(\varpi,z,\varphi)$ and has moving grids in the $\varpi$ and $z$-directions. We use Newtonian gravity and calculate the gravitational radiation in the quadrupole approximation... |
1207.1488 | Steven Carlip | S. Carlip | Effective Conformal Descriptions of Black Hole Entropy: A Review | To appear in Proc. of the Sixth International School on Field Theory
and Gravity, Petropolis, Brazil, 2012 | null | 10.1063/1.4756962 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes behave as thermodynamic objects, and it is natural to ask for an
underlying "statistical mechanical" explanation in terms of microscopic degrees
of freedom. I summarize attempts to describe these degrees of freedom in terms
of a dual two-dimensional conformal field theory, emphasizing the generality of
th... | [
{
"created": "Thu, 5 Jul 2012 23:54:20 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Carlip",
"S.",
""
]
] | Black holes behave as thermodynamic objects, and it is natural to ask for an underlying "statistical mechanical" explanation in terms of microscopic degrees of freedom. I summarize attempts to describe these degrees of freedom in terms of a dual two-dimensional conformal field theory, emphasizing the generality of the ... |
1806.05674 | Tan Liu | Tan Liu, Xing Zhang, Wen Zhao, Kai Lin, Chao Zhang, Shaojun Zhang,
Xiang Zhao, Tao Zhu and Anzhong Wang | Waveforms of compact binary inspiral gravitational radiation in screened
modified gravity | 21 pages, to appear in PRD | Phys. Rev. D 98, 083023 (2018) | 10.1103/PhysRevD.98.083023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar-tensor gravity, with the screening mechanisms to avoid the severe
constraints of the fifth force in the Solar System, can be described with a
unified theoretical framework, the so-called screened modified gravity (SMG).
Within this framework, in this paper we calculate the waveforms of
gravitational-waves (GWs... | [
{
"created": "Thu, 14 Jun 2018 03:40:03 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Oct 2018 11:53:29 GMT",
"version": "v2"
}
] | 2018-10-31 | [
[
"Liu",
"Tan",
""
],
[
"Zhang",
"Xing",
""
],
[
"Zhao",
"Wen",
""
],
[
"Lin",
"Kai",
""
],
[
"Zhang",
"Chao",
""
],
[
"Zhang",
"Shaojun",
""
],
[
"Zhao",
"Xiang",
""
],
[
"Zhu",
"Tao",
""
]... | Scalar-tensor gravity, with the screening mechanisms to avoid the severe constraints of the fifth force in the Solar System, can be described with a unified theoretical framework, the so-called screened modified gravity (SMG). Within this framework, in this paper we calculate the waveforms of gravitational-waves (GWs) ... |
gr-qc/0611136 | Hideaki Kudoh | Hideaki Kudoh | Doubly Spinning Black Rings | 20 pages, 6 figures | Phys.Rev.D75:064006,2007 | 10.1103/PhysRevD.75.064006 | UTAP-571 | gr-qc hep-th | null | We study a method to solve stationary axisymmetric vacuum Einstein equations
numerically. As an illustration, the five-dimensional doubly spinning black
rings that have two independent angular momenta are formulated in a way
suitable for fully nonlinear numerical method. Expanding for small second
angular velocity, t... | [
{
"created": "Mon, 27 Nov 2006 12:19:55 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Kudoh",
"Hideaki",
""
]
] | We study a method to solve stationary axisymmetric vacuum Einstein equations numerically. As an illustration, the five-dimensional doubly spinning black rings that have two independent angular momenta are formulated in a way suitable for fully nonlinear numerical method. Expanding for small second angular velocity, the... |
2012.13429 | Muhammad Zahid Mughal | Muhammad Zahid Mughal, Iftikhar Ahmad | A multifield tachyon quintom model of dark energy and fate of the
universe | 10 pages, 3 figures, 10 sub figures, 2 tables | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate a multi-field model of dark energy in this paper. We develop a
model of dark energy with two multiple scalar fields, one we consider, is a
multifield tachyon and the other is multi-field phantom tachyon scalars. We
make an analysis of the system in phase space by considering inverse square
potentials s... | [
{
"created": "Thu, 24 Dec 2020 19:24:25 GMT",
"version": "v1"
}
] | 2020-12-29 | [
[
"Mughal",
"Muhammad Zahid",
""
],
[
"Ahmad",
"Iftikhar",
""
]
] | We investigate a multi-field model of dark energy in this paper. We develop a model of dark energy with two multiple scalar fields, one we consider, is a multifield tachyon and the other is multi-field phantom tachyon scalars. We make an analysis of the system in phase space by considering inverse square potentials sui... |
1704.03040 | Farhad Darabi | F. Darabi, K. Atazadeh | Einstein static universe, GUP, and natural IR and UV cut-offs | 10 pages, Minor revision, Title change; To be published in "Int. J.
Geom. Methods Mod. Phys" | Int. J. Geometric Methods in Modern Physics 15, 5 (2018) 1850083 | 10.1142/S0219887818500834 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Einstein static universe in the framework of Generalized
Uncertainty Principle constructed by the Snyder non-commutative space. It is
shown that the deformation parameter can induce an effective energy density
subject to GUP which obeys the holographic principle (HP) and plays the role of
a cosmological ... | [
{
"created": "Mon, 10 Apr 2017 20:12:59 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Feb 2018 15:02:04 GMT",
"version": "v2"
}
] | 2019-05-01 | [
[
"Darabi",
"F.",
""
],
[
"Atazadeh",
"K.",
""
]
] | We study the Einstein static universe in the framework of Generalized Uncertainty Principle constructed by the Snyder non-commutative space. It is shown that the deformation parameter can induce an effective energy density subject to GUP which obeys the holographic principle (HP) and plays the role of a cosmological co... |
1503.04354 | Rainer Collier | Rainer Collier | Ideal Quantum Gases with Planck Scale Limitations | 48 pages, 13 figures | null | null | null | gr-qc cond-mat.quant-gas quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A thermodynamic system of non-interacting quantum particles changes its
statistical distribution formulas if there is a universal limitation for the
size of energetic quantum leaps (magnitude of quantum leaps smaller than Planck
energy). By means of a restriction of the a priori equiprobability postulate
one can reac... | [
{
"created": "Sat, 14 Mar 2015 22:00:25 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Collier",
"Rainer",
""
]
] | A thermodynamic system of non-interacting quantum particles changes its statistical distribution formulas if there is a universal limitation for the size of energetic quantum leaps (magnitude of quantum leaps smaller than Planck energy). By means of a restriction of the a priori equiprobability postulate one can reach ... |
1306.4979 | Galina L. Klimchitskaya | G. L. Klimchitskaya, U. Mohideen, and V. M. Mostepanenko | Constraints on corrections to Newtonian gravity from two recent
measurements of the Casimir interaction between metallic surfaces | 18 pages, 5 figures; to appear in Phys. Rev. D | Phys. Rev. D, v.87, 125031 (2013) | 10.1103/PhysRevD.87.125031 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain constraints on parameters of the Yukawa-type corrections to
Newton's gravitational law from measurements of the gradient of the Casimir
force between surfaces coated with ferromagnetic metal Ni and from measurements
of the Casimir force between Au-coated sinusoidally corrugated surfaces at
various angles be... | [
{
"created": "Thu, 20 Jun 2013 11:17:33 GMT",
"version": "v1"
}
] | 2013-07-17 | [
[
"Klimchitskaya",
"G. L.",
""
],
[
"Mohideen",
"U.",
""
],
[
"Mostepanenko",
"V. M.",
""
]
] | We obtain constraints on parameters of the Yukawa-type corrections to Newton's gravitational law from measurements of the gradient of the Casimir force between surfaces coated with ferromagnetic metal Ni and from measurements of the Casimir force between Au-coated sinusoidally corrugated surfaces at various angles betw... |
gr-qc/0405089 | Sigbjorn Hervik | Alan A. Coley and Sigbjorn Hervik | Brane Waves | 9 pages v3:revised version, to appear in CQG | Class.Quant.Grav. 21 (2004) 5759-5766 | 10.1088/0264-9381/21/24/005 | null | gr-qc astro-ph hep-th | null | In brane-world cosmology gravitational waves can propagate in the higher
dimensions (i.e., in the `bulk'). In some appropriate regimes the bulk
gravitational waves may be approximated by plane waves. We systematically study
five-dimensional gravitational waves that are algebraically special and of type
N. In the most... | [
{
"created": "Mon, 17 May 2004 16:57:24 GMT",
"version": "v1"
},
{
"created": "Sun, 23 May 2004 16:00:47 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Oct 2004 19:08:19 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Coley",
"Alan A.",
""
],
[
"Hervik",
"Sigbjorn",
""
]
] | In brane-world cosmology gravitational waves can propagate in the higher dimensions (i.e., in the `bulk'). In some appropriate regimes the bulk gravitational waves may be approximated by plane waves. We systematically study five-dimensional gravitational waves that are algebraically special and of type N. In the most p... |
2104.03766 | Yotam Sherf | Yotam Sherf | Tidal-heating/viscous dissipation correspondence in black holes and
viscous compact objects | Replaced to agree with the published version. Typo in Eq.10 was
corrected | null | 10.1103/PhysRevD.103.104003 | null | gr-qc astro-ph.HE hep-ph hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | The effect of energy absorption during the binary evolution of
Exotic-compact-objects (ECOs) is extensively studied. We review the underlying
mechanism that provides the energy dissipation in material objects - tidal
friction. We show that unlike typical astrophysical objects, where absorption
due to viscosity is neg... | [
{
"created": "Thu, 8 Apr 2021 13:39:38 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Jul 2021 13:17:34 GMT",
"version": "v2"
}
] | 2021-07-05 | [
[
"Sherf",
"Yotam",
""
]
] | The effect of energy absorption during the binary evolution of Exotic-compact-objects (ECOs) is extensively studied. We review the underlying mechanism that provides the energy dissipation in material objects - tidal friction. We show that unlike typical astrophysical objects, where absorption due to viscosity is negli... |
gr-qc/0701155 | Jun-Hong An | Shun-Jin Wang | On the super-fluid property of the relativistic physical vacuum medium
and the inertial motion of particles | 4 pages | null | null | null | gr-qc | null | The similarity between the energy spectra of relativistic particles and that
of quasi-particles in super-conductivity BCS theory makes us conjecture that
the relativistic physical vacuum medium as the ground state of the background
field is a super fluid medium, and the rest mass of a relativistic particle is
like th... | [
{
"created": "Mon, 29 Jan 2007 03:45:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wang",
"Shun-Jin",
""
]
] | The similarity between the energy spectra of relativistic particles and that of quasi-particles in super-conductivity BCS theory makes us conjecture that the relativistic physical vacuum medium as the ground state of the background field is a super fluid medium, and the rest mass of a relativistic particle is like the ... |
2312.10754 | Jose Luis Bl\'azquez-Salcedo | Jose Luis Bl\'azquez-Salcedo, Fech Scen Khoo, Jutta Kunz, Luis Manuel
Gonz\'alez-Romero | Quasinormal modes of Kerr black holes using a spectral decomposition of
the metric perturbations | 18 pages, 5 figures. v2: Minor changes to match published version | Phys. Rev. D 109, 064028 (2024) | 10.1103/PhysRevD.109.064028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report a new method to calculate the quasinormal modes of rotating black
holes, using a spectral decomposition to solve the partial differential
equations that result from introducing linear metric perturbations to a
rotating background. Our approach allows us to calculate a large sector of the
quasinormal mode sp... | [
{
"created": "Sun, 17 Dec 2023 16:04:02 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Mar 2024 09:56:48 GMT",
"version": "v2"
}
] | 2024-03-18 | [
[
"Blázquez-Salcedo",
"Jose Luis",
""
],
[
"Khoo",
"Fech Scen",
""
],
[
"Kunz",
"Jutta",
""
],
[
"González-Romero",
"Luis Manuel",
""
]
] | We report a new method to calculate the quasinormal modes of rotating black holes, using a spectral decomposition to solve the partial differential equations that result from introducing linear metric perturbations to a rotating background. Our approach allows us to calculate a large sector of the quasinormal mode spec... |
gr-qc/0411044 | Giovanni Montani | Giovanni Montani and Riccardo Benini | Frame-independence of the Inhomogeneous Mixmaster Chaos via
Misner-Chitre'-like variables | 8 pages,2 figures, to appear on Phys Rev D | Phys.Rev. D70 (2004) 103527 | 10.1103/PhysRevD.70.103527 | null | gr-qc | null | We outline the covariant nature,with respect to the choice of a reference
frame, of the chaos characterizing the generic cosmological solution near the
initial singularity, i.e. the so-called inhomogeneous Mixmaster model. Our
analysis is based on a "gauge" independent ADM-reduction of the dynamics to the
physical de... | [
{
"created": "Tue, 9 Nov 2004 11:46:45 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Montani",
"Giovanni",
""
],
[
"Benini",
"Riccardo",
""
]
] | We outline the covariant nature,with respect to the choice of a reference frame, of the chaos characterizing the generic cosmological solution near the initial singularity, i.e. the so-called inhomogeneous Mixmaster model. Our analysis is based on a "gauge" independent ADM-reduction of the dynamics to the physical degr... |
gr-qc/9811071 | V. Suneeta | V.Suneeta, R.K.Kaul and T.R.Govindarajan | BTZ Black Hole Entropy from Ponzano-Regge Gravity | 11 pages LaTeX, 3 eps figures, some minor clarifications added,
result unchanged | Mod.Phys.Lett. A14 (1999) 349-358 | 10.1142/S0217732399000407 | IMSc-98/11/52, SU 4240-689 | gr-qc hep-th | null | The entropy of the BTZ black hole is computed in the Ponzano-Regge
formulation of three-dimensional lattice gravity. It is seen that the correct
semi-classical behaviour of entropy is reproduced by states that correspond to
all possible triangulations of the Euclidean black hole.
| [
{
"created": "Fri, 20 Nov 1998 05:53:21 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Jan 1999 10:01:43 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Suneeta",
"V.",
""
],
[
"Kaul",
"R. K.",
""
],
[
"Govindarajan",
"T. R.",
""
]
] | The entropy of the BTZ black hole is computed in the Ponzano-Regge formulation of three-dimensional lattice gravity. It is seen that the correct semi-classical behaviour of entropy is reproduced by states that correspond to all possible triangulations of the Euclidean black hole. |
1301.7074 | Luis Lehner | Carlos Palenzuela, Luis Lehner, Marcelo Ponce, Steven L. Liebling,
Matthew Anderson, David Neilsen, Patrick Motl | Gravitational and electromagnetic outputs from binary neutron star
mergers | 6 pages, 3 figures. Updated version to appear in Phys.Rev.Letters | PhysRevLett 111.061105 (2013) | 10.1103/PhysRevLett.111.061105 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The late stage of an inspiraling neutron star binary gives rise to strong
gravitational wave emission due to its highly dynamic, strong gravity.
Moreover, interactions between the stellar magnetospheres can produce
considerable electromagnetic radiation. We study this scenario using fully
general relativistic, resist... | [
{
"created": "Tue, 29 Jan 2013 21:03:27 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jul 2013 16:04:22 GMT",
"version": "v2"
}
] | 2013-08-27 | [
[
"Palenzuela",
"Carlos",
""
],
[
"Lehner",
"Luis",
""
],
[
"Ponce",
"Marcelo",
""
],
[
"Liebling",
"Steven L.",
""
],
[
"Anderson",
"Matthew",
""
],
[
"Neilsen",
"David",
""
],
[
"Motl",
"Patrick",
""
]
] | The late stage of an inspiraling neutron star binary gives rise to strong gravitational wave emission due to its highly dynamic, strong gravity. Moreover, interactions between the stellar magnetospheres can produce considerable electromagnetic radiation. We study this scenario using fully general relativistic, resistiv... |
2306.06677 | Siddheshwar Kadam | S. A. Kadam, Ninaad P. Thakkar, B. Mishra | Dynamical system analysis in teleparallel gravity with boundary term | 15 pages, 10 figures, 8 tables | Eur. Phys. J. C (2023) 83:809 | 10.1140/epjc/s10052-023-11937-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we perform the dynamical system analysis of the cosmological
models framed in the extended teleparallel gravity, the $f (T, B)$ gravity. We
use the mapping, $f(T, B)$ $\rightarrow$-$T$+$\tilde{f}(T, B)$, and define the
dynamical variables to form the autonomous dynamical system. The critical
points are... | [
{
"created": "Sun, 11 Jun 2023 13:27:57 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Sep 2023 04:18:42 GMT",
"version": "v2"
}
] | 2023-09-13 | [
[
"Kadam",
"S. A.",
""
],
[
"Thakkar",
"Ninaad P.",
""
],
[
"Mishra",
"B.",
""
]
] | In this paper, we perform the dynamical system analysis of the cosmological models framed in the extended teleparallel gravity, the $f (T, B)$ gravity. We use the mapping, $f(T, B)$ $\rightarrow$-$T$+$\tilde{f}(T, B)$, and define the dynamical variables to form the autonomous dynamical system. The critical points are o... |
1510.04423 | Mir Faizal | Remo Garattini, Mir Faizal | Cosmological Constant from a Deformation of the Wheeler-DeWitt Equation | 11 pages, 0 figures, Accepted in Nucl. Phys. B | Nucl. Phys. B905, 313 (2016) | 10.1016/j.nuclphysb.2016.02.023 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider the Wheeler-DeWitt equation modified by a
deformation of the second quantized canonical commutation relations. Such
modified commutation relations are induced by a Generalized Uncertainty
Principle. Since the Wheeler-DeWitt equation can be related to a
Sturm-Liouville problem where the asso... | [
{
"created": "Thu, 15 Oct 2015 07:15:39 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Feb 2016 06:28:06 GMT",
"version": "v2"
}
] | 2016-03-14 | [
[
"Garattini",
"Remo",
""
],
[
"Faizal",
"Mir",
""
]
] | In this paper, we consider the Wheeler-DeWitt equation modified by a deformation of the second quantized canonical commutation relations. Such modified commutation relations are induced by a Generalized Uncertainty Principle. Since the Wheeler-DeWitt equation can be related to a Sturm-Liouville problem where the associ... |
2404.09887 | David Kofro\v{n} | David Kofro\v{n} | Kerr black hole in the formalism of isolated horizons | null | Phys. Rev. D 109, 084029 (2024) | 10.1103/PhysRevD.109.084029 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We revise the work of Scholtz, Flandera and G\"urlebeck [Kerr-Newman black
hole in the formalism of isolated horizons, Phys. Rev. D 96, 064024 (2017)]. We
cast the Kerr metric explicitly in the form suitable for the framework of
isolated horizons. We proceed in a geometrical fashion and are capable to
provide the res... | [
{
"created": "Mon, 15 Apr 2024 15:54:34 GMT",
"version": "v1"
}
] | 2024-04-16 | [
[
"Kofroň",
"David",
""
]
] | We revise the work of Scholtz, Flandera and G\"urlebeck [Kerr-Newman black hole in the formalism of isolated horizons, Phys. Rev. D 96, 064024 (2017)]. We cast the Kerr metric explicitly in the form suitable for the framework of isolated horizons. We proceed in a geometrical fashion and are capable to provide the resul... |
2202.08655 | Sebastian V\"olkel | Sebastian H. V\"olkel, Nicola Franchini, Enrico Barausse | Theory-agnostic Reconstruction of Potential and Couplings from
Quasi-Normal Modes | 13 pages, 8 figures | Phys. Rev. D 105, 084046, 2022 | 10.1103/PhysRevD.105.084046 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we use a parametrized theory-agnostic approach that connects
the observation of black hole quasi-normal modes with the underlying
perturbation equations, with the goal of reconstructing the potential and the
coupling functions appearing in the latter. The fundamental quasi-normal mode
frequency and its ... | [
{
"created": "Thu, 17 Feb 2022 13:37:30 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Apr 2022 13:35:32 GMT",
"version": "v2"
}
] | 2022-04-27 | [
[
"Völkel",
"Sebastian H.",
""
],
[
"Franchini",
"Nicola",
""
],
[
"Barausse",
"Enrico",
""
]
] | In this work, we use a parametrized theory-agnostic approach that connects the observation of black hole quasi-normal modes with the underlying perturbation equations, with the goal of reconstructing the potential and the coupling functions appearing in the latter. The fundamental quasi-normal mode frequency and its fi... |
2010.12578 | Chandra Prakash | Chandra Prakash | Mathematical problems in the Theory of ECO | Shortened the paper by summarizing important results | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A critical overview of the concepts that govern the principles of the
Eternally Collapsing Object (ECO) is entailed in this article. The mathematical
analysis will be dealt to conclude the proof required for the ECO paradigm is
ad-hoc in nature at best. The first section details in rejecting black holes
always consid... | [
{
"created": "Thu, 22 Oct 2020 19:56:16 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Dec 2020 15:39:31 GMT",
"version": "v2"
},
{
"created": "Sun, 10 Jul 2022 07:32:00 GMT",
"version": "v3"
}
] | 2022-07-12 | [
[
"Prakash",
"Chandra",
""
]
] | A critical overview of the concepts that govern the principles of the Eternally Collapsing Object (ECO) is entailed in this article. The mathematical analysis will be dealt to conclude the proof required for the ECO paradigm is ad-hoc in nature at best. The first section details in rejecting black holes always consider... |
1806.03691 | Yen Chin Ong | Yen Chin Ong | Zero Mass Remnant as an Asymptotic State of Hawking Evaporation | 5 pages, 4 figures | JHEP 10 (2018) 195 | 10.1007/JHEP10(2018)195 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that although generalized uncertainty principle with negative
parameter allows black holes to evaporate completely, this process takes an
infinite amount time to achieve, resulting in a metastable remnant.
| [
{
"created": "Sun, 10 Jun 2018 17:00:07 GMT",
"version": "v1"
}
] | 2018-11-06 | [
[
"Ong",
"Yen Chin",
""
]
] | We show that although generalized uncertainty principle with negative parameter allows black holes to evaporate completely, this process takes an infinite amount time to achieve, resulting in a metastable remnant. |
0812.4121 | Emilio Santos Corchero | Emilio Santos | Quantum vacuum fluctuations and dark energy | Changed content | Astrophysics and Space Science (2010) 363,7-10 | 10.1007/s10509-009-0204-6 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the curvature of space-time induced by vacuum fluctuations
of quantum fields should be proportional to the square of Newton's constant
$G$. This offers a possible explanation for the success of the approximation $G
m^6 c^2 h^{-4}$ for the dark energy density, with $m$ being a typical mass of
elementa... | [
{
"created": "Mon, 22 Dec 2008 08:43:04 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Dec 2009 09:09:00 GMT",
"version": "v2"
}
] | 2021-06-16 | [
[
"Santos",
"Emilio",
""
]
] | It is shown that the curvature of space-time induced by vacuum fluctuations of quantum fields should be proportional to the square of Newton's constant $G$. This offers a possible explanation for the success of the approximation $G m^6 c^2 h^{-4}$ for the dark energy density, with $m$ being a typical mass of elementary... |
2008.01213 | Vladimir S. Manko | H. Garc\'ia-Compe\'an, V. S. Manko, C. J. Ram\'irez-Valdez | Thermodynamics of two aligned Kerr-Newman black holes | 13 pages, 2 figures | Phys. Rev. D 103, 104001 (2021) | 10.1103/PhysRevD.103.104001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the notion of thermodynamic length, the first law of thermodynamics is
consistently derived for two binary configurations of equal Kerr-Newman black
holes separated by a massless strut. Like in the electrostatic systems of two
Reissner-Nordstr\"om black holes and stationary vacuum systems of two Kerr
black hole... | [
{
"created": "Mon, 3 Aug 2020 21:47:25 GMT",
"version": "v1"
}
] | 2021-06-24 | [
[
"García-Compeán",
"H.",
""
],
[
"Manko",
"V. S.",
""
],
[
"Ramírez-Valdez",
"C. J.",
""
]
] | Using the notion of thermodynamic length, the first law of thermodynamics is consistently derived for two binary configurations of equal Kerr-Newman black holes separated by a massless strut. Like in the electrostatic systems of two Reissner-Nordstr\"om black holes and stationary vacuum systems of two Kerr black holes ... |
1905.04588 | Alan Coley | A. A. Coley | Spatial Curvature in Cosmology Revisited | This short manuscript summarizes a recent talk and is based on
previously published work | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is necessary to make assumptions in order to derive models to be used for
cosmological predictions and comparison with observational data. In particular,
in standard cosmology the spatial curvature is assumed to be constant and zero
(or at least very small). But there is, as yet, no fully independent constraint
wi... | [
{
"created": "Sat, 11 May 2019 20:34:00 GMT",
"version": "v1"
}
] | 2019-05-14 | [
[
"Coley",
"A. A.",
""
]
] | It is necessary to make assumptions in order to derive models to be used for cosmological predictions and comparison with observational data. In particular, in standard cosmology the spatial curvature is assumed to be constant and zero (or at least very small). But there is, as yet, no fully independent constraint with... |
gr-qc/0104017 | Cenalo Vaz | Cenalo Vaz (U. Algarve) and Louis Witten (U. Cincinnati) | Quantum Black Holes from Quantum Collapse | LaTeX file, 6 pages, 1 figure, Paper re-written into sections, some
references added, some elaborations, conclusions unchanged, to appear in
Physical Review D | Phys.Rev.D64:084005,2001 | 10.1103/PhysRevD.64.084005 | null | gr-qc hep-th | null | The Schwarzschild black hole can be viewed as the special case of the
marginally bound Lema\^\i tre-Tolman-Bondi models of dust collapse which
corresponds to a constant mass function. We have presented a midi-superspace
quantization of this model for an arbitrary mass-function in a separate
publication. In this commu... | [
{
"created": "Wed, 4 Apr 2001 18:26:08 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Jul 2001 11:40:38 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Vaz",
"Cenalo",
"",
"U. Algarve"
],
[
"Witten",
"Louis",
"",
"U. Cincinnati"
]
] | The Schwarzschild black hole can be viewed as the special case of the marginally bound Lema\^\i tre-Tolman-Bondi models of dust collapse which corresponds to a constant mass function. We have presented a midi-superspace quantization of this model for an arbitrary mass-function in a separate publication. In this communi... |
1609.00354 | T. Damour | Thibault Damour | Gravitational scattering, post-Minkowskian approximation and Effective
One-Body theory | 12 pages, 1 figure | Phys. Rev. D 94, 104015 (2016) | 10.1103/PhysRevD.94.104015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A novel approach to the Effective One-Body description of gravitationally
interacting two-body systems is introduced. This approach is based on the
post-Minkowskian approximation scheme (perturbation theory in G, without
assuming small velocities), and employs a new dictionary focussing on the
functional dependence o... | [
{
"created": "Thu, 1 Sep 2016 19:25:22 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Damour",
"Thibault",
""
]
] | A novel approach to the Effective One-Body description of gravitationally interacting two-body systems is introduced. This approach is based on the post-Minkowskian approximation scheme (perturbation theory in G, without assuming small velocities), and employs a new dictionary focussing on the functional dependence of ... |
1511.05183 | Merav Hadad | Merav Hadad, Levy Rosenblum | The two canonical conjugate pairs at the horizon of a D1D5 black hole | null | Phys. Rev. D 92, 124025 (2015) | 10.1103/PhysRevD.92.124025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Euclidian opening angle at the $r-t_E$ surface, $\Theta_{r-t_E}$ at the
horizon of a black hole is canonically conjugate to the black hole entropy. We
prove that for a $D1D5$ black hole there exists in addition to this pair,
another canonical pair: the opening angle at the $r-y$ surface, $\Theta_{r-y}$
and a Wald... | [
{
"created": "Mon, 16 Nov 2015 21:20:10 GMT",
"version": "v1"
}
] | 2015-12-16 | [
[
"Hadad",
"Merav",
""
],
[
"Rosenblum",
"Levy",
""
]
] | The Euclidian opening angle at the $r-t_E$ surface, $\Theta_{r-t_E}$ at the horizon of a black hole is canonically conjugate to the black hole entropy. We prove that for a $D1D5$ black hole there exists in addition to this pair, another canonical pair: the opening angle at the $r-y$ surface, $\Theta_{r-y}$ and a Wald l... |
2006.12137 | Sayantani Datta | Sayantani Datta, Anuradha Gupta, Shilpa Kastha, K. G. Arun, B. S.
Sathyaprakash | Tests of general relativity using multiband observations of intermediate
mass binary black hole mergers | 12 pages, 6 figures | Phys. Rev. D 103, 024036 (2021) | 10.1103/PhysRevD.103.024036 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observation of gravitational waves (GWs) in two different frequency bands is
referred to as multiband GW astronomy. With the planned Laser Interferometric
Space Antenna (LISA) operating in the $10^{-4}-0.1$ Hz range, and third
generation (3G) ground-based detectors such as the Cosmic Explorer (CE) and
Einstein Telesc... | [
{
"created": "Mon, 22 Jun 2020 10:55:12 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Mar 2021 07:10:50 GMT",
"version": "v2"
}
] | 2021-03-17 | [
[
"Datta",
"Sayantani",
""
],
[
"Gupta",
"Anuradha",
""
],
[
"Kastha",
"Shilpa",
""
],
[
"Arun",
"K. G.",
""
],
[
"Sathyaprakash",
"B. S.",
""
]
] | Observation of gravitational waves (GWs) in two different frequency bands is referred to as multiband GW astronomy. With the planned Laser Interferometric Space Antenna (LISA) operating in the $10^{-4}-0.1$ Hz range, and third generation (3G) ground-based detectors such as the Cosmic Explorer (CE) and Einstein Telescop... |
1102.3781 | Evan Ochsner | The LIGO Scientific Collaboration, the Virgo Collaboration: J. Abadie,
B. P. Abbott, R. Abbott, M. Abernathy, T. Accadia, F. Acernese, C. Adams, R.
Adhikari, P. Ajith, B. Allen, G. S. Allen, E. Amador Ceron, R. S. Amin, S. B.
Anderson, W. G. Anderson, F. Antonucci, M. A. Arain, M. C. Araya, M.
Aronsson, Y. Aso,... | Search for gravitational waves from binary black hole inspiral, merger
and ringdown | 19 pages, 3 figures | Phys.Rev.D83:122005,2011 | 10.1103/PhysRevD.83.122005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first modeled search for gravitational waves using the
complete binary black hole gravitational waveform from inspiral through the
merger and ringdown for binaries with negligible component spin. We searched
approximately 2 years of LIGO data taken between November 2005 and September
2007 for systems w... | [
{
"created": "Fri, 18 Feb 2011 08:39:48 GMT",
"version": "v1"
}
] | 2012-08-27 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Abadie",
"J.",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abernathy",
"M.",
""
],
[
"Accadia",
"T.",
... | We present the first modeled search for gravitational waves using the complete binary black hole gravitational waveform from inspiral through the merger and ringdown for binaries with negligible component spin. We searched approximately 2 years of LIGO data taken between November 2005 and September 2007 for systems wit... |
gr-qc/0203068 | Randall Guedes Teixeira | R. Casana, B. M. Pimentel (Sao Paulo, IFT), J. T. Lunardi (Ponta
Grossa State U.) and R. G. Teixeira (Sao Judas Tadeu U.) | Spin 1 fields in Riemann-Cartan space-times "via" Duffin-Kemmer-Petiau
theory | 8 pages, no figures, revtex. Dedicated to Professor Gerhard Wilhelm
Bund on the occasion of his 70th birthday. To appear in Gen. Rel. Grav.
Equations numbering corrected. References updated | Gen.Rel.Grav. 34 (2002) 1941-1951 | 10.1023/A:1020732611995 | null | gr-qc | null | We consider massive spin 1 fields, in Riemann-Cartan space-times, described
by Duffin-Kemmer-Petiau theory. We show that this approach induces a coupling
between the spin 1 field and the space-time torsion which breaks the usual
equivalence with the Proca theory, but that such equivalence is preserved in
the context ... | [
{
"created": "Wed, 20 Mar 2002 20:48:49 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Sep 2002 16:05:00 GMT",
"version": "v2"
}
] | 2020-05-19 | [
[
"Casana",
"R.",
"",
"Sao Paulo, IFT"
],
[
"Pimentel",
"B. M.",
"",
"Sao Paulo, IFT"
],
[
"Lunardi",
"J. T.",
"",
"Ponta\n Grossa State U."
],
[
"Teixeira",
"R. G.",
"",
"Sao Judas Tadeu U."
]
] | We consider massive spin 1 fields, in Riemann-Cartan space-times, described by Duffin-Kemmer-Petiau theory. We show that this approach induces a coupling between the spin 1 field and the space-time torsion which breaks the usual equivalence with the Proca theory, but that such equivalence is preserved in the context of... |
gr-qc/0410082 | Donato Bini | Donato Bini, Fernando de Felice, Andrea Geralico | Spinning test particles and clock effect in Schwarzschild spacetime | IOP macros, eps figures n. 2, to appear on Classical and Quantum
gravity, 2004 | Class.Quant.Grav.21:5427-5440,2004 | 10.1088/0264-9381/21/23/009 | null | gr-qc | null | We study the behaviour of spinning test particles in the Schwarzschild
spacetime. Using Mathisson-Papapetrou equations of motion we confine our
attention to spatially circular orbits and search for observable effects which
could eventually discriminate among the standard supplementary conditions
namely the Corinaldes... | [
{
"created": "Mon, 18 Oct 2004 13:44:42 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Bini",
"Donato",
""
],
[
"de Felice",
"Fernando",
""
],
[
"Geralico",
"Andrea",
""
]
] | We study the behaviour of spinning test particles in the Schwarzschild spacetime. Using Mathisson-Papapetrou equations of motion we confine our attention to spatially circular orbits and search for observable effects which could eventually discriminate among the standard supplementary conditions namely the Corinaldesi-... |
2110.04846 | Mehdi Shokri | J. Sadeghi, M. Shokri, S. Noori Gashti, B. Pourhassan and P. Rudra | Traversable wormhole in logarithmic $f(R)$ gravity by various shape and
redshift functions | 16 pages, 4 figures, accepted version of paper | International Journal of Modern Physics D, 2022 | 10.1142/S0218271822500195 | Vol. 31, No. 03, 2250019 | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | We study the traversable wormhole solutions for a logarithmic corrected
$f(R)$ model by considering two different statements of shape $b(r)$ and
redshift $\Phi(r)$ functions. We calculate the parameters of the model
including energy density $\rho$, tangential pressure $P_{t}$ and radial
pressure $P_{r}$ for the corre... | [
{
"created": "Sun, 10 Oct 2021 16:26:45 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Nov 2021 16:12:35 GMT",
"version": "v2"
},
{
"created": "Sat, 26 Mar 2022 08:29:22 GMT",
"version": "v3"
}
] | 2022-03-29 | [
[
"Sadeghi",
"J.",
""
],
[
"Shokri",
"M.",
""
],
[
"Gashti",
"S. Noori",
""
],
[
"Pourhassan",
"B.",
""
],
[
"Rudra",
"P.",
""
]
] | We study the traversable wormhole solutions for a logarithmic corrected $f(R)$ model by considering two different statements of shape $b(r)$ and redshift $\Phi(r)$ functions. We calculate the parameters of the model including energy density $\rho$, tangential pressure $P_{t}$ and radial pressure $P_{r}$ for the corresp... |
gr-qc/0003047 | Sang Pyo Kim | Donsu Bak, Sang Pyo Kim, Sung Ku Kim, Kwang-Sup Soh, Jae Hyung Yee | Black Hole Decay and Quantum Instantons | RevTex, 7 pages, no figure; The wave functions of gr-qc/9912115 are
newly interpreted as quantum instantons describing a black hole decay.
Replaced by the version to be published in Phys. Rev. D, in which the
boundary condition on the apparent horizon is clarified | Phys.Rev.D62:047504,2000 | 10.1103/PhysRevD.62.047504 | null | gr-qc | null | We study the analytic structure of the S-matrix which is obtained from the
reduced Wheeler-DeWitt wave function describing spherically symmetric
gravitational collapse of massless scalar fields. The complex simple poles in
the S-matrix lead to the wave functions that satisfy the same boundary
condition as quasi-norma... | [
{
"created": "Mon, 13 Mar 2000 09:27:29 GMT",
"version": "v1"
},
{
"created": "Sat, 6 May 2000 01:10:16 GMT",
"version": "v2"
}
] | 2010-03-02 | [
[
"Bak",
"Donsu",
""
],
[
"Kim",
"Sang Pyo",
""
],
[
"Kim",
"Sung Ku",
""
],
[
"Soh",
"Kwang-Sup",
""
],
[
"Yee",
"Jae Hyung",
""
]
] | We study the analytic structure of the S-matrix which is obtained from the reduced Wheeler-DeWitt wave function describing spherically symmetric gravitational collapse of massless scalar fields. The complex simple poles in the S-matrix lead to the wave functions that satisfy the same boundary condition as quasi-normal ... |
1205.3542 | Khaled Saaidi | Khaled Saaidi | (Non-) geodesic motion in chameleon Brans Dicke model | 7 pages, no figures | Astrophys. Space Sci. 345 (2013) 431 | 10.1007/s10509-013-1407-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on \cite{16}, we assume there is a non-minimal coupling between the
scalar field and matter in Brans-Dicke model. We analyzes the motion of
different matter such as, massless scalar field, photon, massless perfect fluid
(dust), massive perfect fluid and point particle matter in this theory. We show
that the mot... | [
{
"created": "Wed, 16 May 2012 02:21:00 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Jan 2014 12:29:24 GMT",
"version": "v2"
}
] | 2014-01-17 | [
[
"Saaidi",
"Khaled",
""
]
] | Based on \cite{16}, we assume there is a non-minimal coupling between the scalar field and matter in Brans-Dicke model. We analyzes the motion of different matter such as, massless scalar field, photon, massless perfect fluid (dust), massive perfect fluid and point particle matter in this theory. We show that the motio... |
1708.09670 | Herve Bergeron | Herv\'e Bergeron, Ewa Czuchry, Przemys{\l}aw Ma{\l}kiewicz | Coherent states quantization and affine symmetry in quantum models of
gravitational singularities | 27 pages, 10 figures, Contribution to the Proceedings of the
conference "Coherent States and their Applications: A Contemporary Panorama",
November 14-18th, 2016, Centre International de Rencontres Scientifiques,
Luminy, Marseille, France | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We employ the framework of affine covariant quantization and associated
semiclassical portrait to address two main issues in the domain of quantum
gravitational systems: (i) the fate of singularities and (ii) the lack of
external time. Our discussion is based on finite-dimensional, symmetry-reduced
cosmological model... | [
{
"created": "Thu, 31 Aug 2017 11:21:39 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Sep 2017 14:17:41 GMT",
"version": "v2"
}
] | 2017-09-19 | [
[
"Bergeron",
"Hervé",
""
],
[
"Czuchry",
"Ewa",
""
],
[
"Małkiewicz",
"Przemysław",
""
]
] | We employ the framework of affine covariant quantization and associated semiclassical portrait to address two main issues in the domain of quantum gravitational systems: (i) the fate of singularities and (ii) the lack of external time. Our discussion is based on finite-dimensional, symmetry-reduced cosmological models.... |
2303.07380 | Matt Visser | Joshua Baines (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | Killing horizons and surface gravities for a well-behaved three-function
generalisation of the Kerr spacetime | V1: 24 pages, no figures. V2: Two references added, minor changes in
presentation. No changes in the physics. V3: Now 28 pages. Extra discussion
and references; no changes in the physics. This version closely resembles the
published version | Universe 9 # 5 (2023) 223 | 10.3390/universe9050223 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Thanks to the recent advent of the event horizon telescope (EHT), we now have
the opportunity to test the physical ramifications of the strong-field
near-horizon regime for astrophysical black holes. Herein, emphasizing the
trade-off between tractability and generality, the authors discuss a
particularly powerful thr... | [
{
"created": "Mon, 13 Mar 2023 18:01:09 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Mar 2023 06:39:04 GMT",
"version": "v2"
},
{
"created": "Mon, 15 May 2023 06:12:51 GMT",
"version": "v3"
}
] | 2023-05-16 | [
[
"Baines",
"Joshua",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | Thanks to the recent advent of the event horizon telescope (EHT), we now have the opportunity to test the physical ramifications of the strong-field near-horizon regime for astrophysical black holes. Herein, emphasizing the trade-off between tractability and generality, the authors discuss a particularly powerful three... |
gr-qc/9402042 | Misao Sasaki | Misao Sasaki | Post-Newtonian Expansion of the Ingoing-Wave Regge-Wheeler Function | 31 pages, KUNS 1246 | Prog.Theor.Phys.92:17-36,1994 | 10.1143/PTP.92.17 | null | gr-qc | null | We present a method of post-Newtonian expansion to solve the homogeneous
Regge-Wheeler equation which describes gravitational waves on the Schwarzschild
spacetime. The advantage of our method is that it allows a systematic iterative
analysis of the solution. Then we obtain the Regge-Wheeler function which is
purely i... | [
{
"created": "Thu, 24 Feb 1994 08:00:48 GMT",
"version": "v1"
}
] | 2009-10-09 | [
[
"Sasaki",
"Misao",
""
]
] | We present a method of post-Newtonian expansion to solve the homogeneous Regge-Wheeler equation which describes gravitational waves on the Schwarzschild spacetime. The advantage of our method is that it allows a systematic iterative analysis of the solution. Then we obtain the Regge-Wheeler function which is purely ing... |
1005.4477 | Muhammad Sharif | M. Sharif and Umber Sheikh | Cold Plasma Wave Analysis in Magneto-Rotational Fluids | 22 pages, 18 figures, accepted for publication in Astrophys. Space
Sci | Astrophys.Space Sci.330:317-328,2010 | 10.1007/s10509-010-0407-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to investigate the cold plasma wave properties. The
analysis has been restricted to the neighborhood of the pair production region
of the Kerr magnetosphere. The Fourier analyzed general relativistic
magnetohydrodynamical equations are dealt under special circumstances and
dispersion relations a... | [
{
"created": "Tue, 25 May 2010 04:12:12 GMT",
"version": "v1"
}
] | 2010-11-03 | [
[
"Sharif",
"M.",
""
],
[
"Sheikh",
"Umber",
""
]
] | This paper is devoted to investigate the cold plasma wave properties. The analysis has been restricted to the neighborhood of the pair production region of the Kerr magnetosphere. The Fourier analyzed general relativistic magnetohydrodynamical equations are dealt under special circumstances and dispersion relations are... |
1903.10530 | Shahar Hod | Shahar Hod | Upper bound on the gravitational masses of stable spatially regular
charged compact objects | 5 pages | Physical Review D 98, 064014 (2018) | 10.1103/PhysRevD.98.064014 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a very interesting paper, Andr\'easson has recently proved that the
gravitational mass of a spherically symmetric compact object of radius $R$ and
electric charge $Q$ is bounded from above by the relation
$\sqrt{M}\leq{{\sqrt{R}}\over{3}}+\sqrt{{{R}\over{9}}+{{Q^2}\over{3R}}}$. In
the present paper we prove that, ... | [
{
"created": "Mon, 25 Mar 2019 18:01:40 GMT",
"version": "v1"
}
] | 2019-04-03 | [
[
"Hod",
"Shahar",
""
]
] | In a very interesting paper, Andr\'easson has recently proved that the gravitational mass of a spherically symmetric compact object of radius $R$ and electric charge $Q$ is bounded from above by the relation $\sqrt{M}\leq{{\sqrt{R}}\over{3}}+\sqrt{{{R}\over{9}}+{{Q^2}\over{3R}}}$. In the present paper we prove that, in... |
1709.07261 | Vincenzo Vitagliano | Paulo Luz (Minho U. and Lisbon, CENTRA) and Vincenzo Vitagliano
(Lisbon, CENTRA) | Raychaudhuri equation in spacetimes with torsion | 8 pages | Phys.Rev. D96 (2017) no.2, 024021 | 10.1103/PhysRevD.96.024021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Given a spacetime with nonvanishing torsion, we discuss the equation for the
evolution of the separation vector between infinitesimally close curves in a
congruence. We show that the presence of a torsion field leads, in general, to
tangent and orthogonal effects on the congruence; in particular, the presence
of a co... | [
{
"created": "Thu, 21 Sep 2017 11:08:41 GMT",
"version": "v1"
}
] | 2017-09-22 | [
[
"Luz",
"Paulo",
"",
"Minho U. and Lisbon, CENTRA"
],
[
"Vitagliano",
"Vincenzo",
"",
"Lisbon, CENTRA"
]
] | Given a spacetime with nonvanishing torsion, we discuss the equation for the evolution of the separation vector between infinitesimally close curves in a congruence. We show that the presence of a torsion field leads, in general, to tangent and orthogonal effects on the congruence; in particular, the presence of a comp... |
1609.01735 | Richard Brito | Miguel Duarte, Richard Brito | Asymptotically anti-de Sitter Proca Stars | 8 pages, 6 figures. v2: references added, matches published version | Phys.Rev.D94, 064055 (2016) | 10.1103/PhysRevD.94.064055 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that complex, massive spin-1 fields minimally coupled to Einstein's
gravity with a negative cosmological constant, admit asymptotically anti-de
Sitter self-gravitating solutions. Focusing on 4-dimensional spacetimes, we
start by obtaining analytical solutions in the test-field limit, where the
Proca field equ... | [
{
"created": "Tue, 6 Sep 2016 20:03:27 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Sep 2016 17:02:48 GMT",
"version": "v2"
}
] | 2016-09-26 | [
[
"Duarte",
"Miguel",
""
],
[
"Brito",
"Richard",
""
]
] | We show that complex, massive spin-1 fields minimally coupled to Einstein's gravity with a negative cosmological constant, admit asymptotically anti-de Sitter self-gravitating solutions. Focusing on 4-dimensional spacetimes, we start by obtaining analytical solutions in the test-field limit, where the Proca field equat... |
gr-qc/0606059 | Leonardo Gualtieri | Valeria Ferrari, Leonardo Gualtieri, Luciano Rezzolla | A hybrid approach to black hole perturbations from extended matter
sources | 12 pages, 4 figures. Phys. Rev. D, in press | Phys.Rev. D73 (2006) 124028 | 10.1103/PhysRevD.73.124028 | null | gr-qc astro-ph | null | We present a new method for the calculation of black hole perturbations
induced by extended sources in which the solution of the nonlinear
hydrodynamics equations is coupled to a perturbative method based on
Regge-Wheeler/Zerilli and Bardeen-Press-Teukolsky equations when these are
solved in the frequency domain. In ... | [
{
"created": "Tue, 13 Jun 2006 18:40:29 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Ferrari",
"Valeria",
""
],
[
"Gualtieri",
"Leonardo",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | We present a new method for the calculation of black hole perturbations induced by extended sources in which the solution of the nonlinear hydrodynamics equations is coupled to a perturbative method based on Regge-Wheeler/Zerilli and Bardeen-Press-Teukolsky equations when these are solved in the frequency domain. In co... |
2008.12300 | Keisuke Inomata | Keisuke Inomata | Analytic solutions of scalar perturbations induced by scalar
perturbations | 37 pages, 7 figures, v2: version published in JCAP, paragraph
structure changed | null | 10.1088/1475-7516/2021/03/013 | RESCEU-19/20 | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study scalar perturbations induced by scalar perturbations through the
non-linear interaction appearing at second order in perturbations. We derive
analytic solutions of the induced scalar perturbations in a perfect fluid. In
particular, we consider the perturbations in a radiation-dominated era and a
matter-domin... | [
{
"created": "Thu, 27 Aug 2020 15:01:02 GMT",
"version": "v1"
},
{
"created": "Sun, 14 Mar 2021 14:42:07 GMT",
"version": "v2"
}
] | 2021-03-17 | [
[
"Inomata",
"Keisuke",
""
]
] | We study scalar perturbations induced by scalar perturbations through the non-linear interaction appearing at second order in perturbations. We derive analytic solutions of the induced scalar perturbations in a perfect fluid. In particular, we consider the perturbations in a radiation-dominated era and a matter-dominat... |
gr-qc/0301001 | Seiberg | Hong Liu, Gregory Moore and Nathan Seiberg | The Challenging Cosmic Singularity | 11 pages | null | null | null | gr-qc | null | In this talk we discuss the cosmic singularity. We motivate the need to
correct general relativity in the study of singularities, and mention the kind
of corrections provided by string theory. We review how string theory resolves
time-like singularities with two examples. Then, a simple toy model with
lightlike singu... | [
{
"created": "Tue, 31 Dec 2002 21:23:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Liu",
"Hong",
""
],
[
"Moore",
"Gregory",
""
],
[
"Seiberg",
"Nathan",
""
]
] | In this talk we discuss the cosmic singularity. We motivate the need to correct general relativity in the study of singularities, and mention the kind of corrections provided by string theory. We review how string theory resolves time-like singularities with two examples. Then, a simple toy model with lightlike singula... |
gr-qc/0106018 | Roberto Casadio | R. Casadio and B. Harms | Black Hole Decay Rates in Large Extra Dimensions | LaTeX2e with Rinton style, 4 pages, 2 figure EPS files, to appear in
the Proceedings of PASCOS 2001 | null | null | null | gr-qc astro-ph hep-th | null | We study the evaporation of black holes in space-times with extra dimensions
of size L. We show that the luminosity is greatly damped when the horizon
becomes smaller than L and black holes born with an initial size smaller than L
are almost stable. This effect is due to the dependence of both the occupation
number d... | [
{
"created": "Wed, 6 Jun 2001 08:01:29 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Casadio",
"R.",
""
],
[
"Harms",
"B.",
""
]
] | We study the evaporation of black holes in space-times with extra dimensions of size L. We show that the luminosity is greatly damped when the horizon becomes smaller than L and black holes born with an initial size smaller than L are almost stable. This effect is due to the dependence of both the occupation number den... |
1812.07923 | Alessandro Nagar | Alessandro Nagar, Francesco Messina, Piero Rettegno, Donato Bini,
Thibault Damour, Andrea Geralico, Sarp Akcay, and Sebastiano Bernuzzi | Nonlinear-in-spin effects in effective-one-body waveform models of
spin-aligned, inspiralling, neutron star binaries | 22 pages, 4 figures, submitted to Phys. Rev. D | Phys. Rev. D 99, 044007 (2019) | 10.1103/PhysRevD.99.044007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spinning neutron stars acquire a quadrupole moment due to their own rotation.
This quadratic-in-spin, self-spin effect depends on the equation of state (EOS)
and affects the orbital motion and rate of inspiral of neutron star binaries.
We incorporate the EOS-dependent self-spin (or monopole-quadrupole) terms in
the s... | [
{
"created": "Wed, 19 Dec 2018 13:05:38 GMT",
"version": "v1"
}
] | 2019-02-13 | [
[
"Nagar",
"Alessandro",
""
],
[
"Messina",
"Francesco",
""
],
[
"Rettegno",
"Piero",
""
],
[
"Bini",
"Donato",
""
],
[
"Damour",
"Thibault",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Akcay",
"Sarp",
""
],
[... | Spinning neutron stars acquire a quadrupole moment due to their own rotation. This quadratic-in-spin, self-spin effect depends on the equation of state (EOS) and affects the orbital motion and rate of inspiral of neutron star binaries. We incorporate the EOS-dependent self-spin (or monopole-quadrupole) terms in the spi... |
2010.00281 | Simran Arora | Simran Arora and P.K. Sahoo | Energy conditions in $f(Q,T)$ gravity | Published version in Physica Scripta | Physica Scripta, 95(9) (2020) 095003 | 10.1088/1402-4896/abaddc | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recently proposed $f(Q, T)$ gravity (Xu et al. Eur. Phys. J. C
\textbf{79} (2019) 708) is an extension of the symmetric teleparallel gravity.
The gravitational action $L$ is given by an arbitrary function $f$ of the
non-metricity $Q$ and the trace of the matter-energy momentum tensor $T$. In
this paper, we examin... | [
{
"created": "Thu, 1 Oct 2020 10:10:21 GMT",
"version": "v1"
}
] | 2020-10-02 | [
[
"Arora",
"Simran",
""
],
[
"Sahoo",
"P. K.",
""
]
] | The recently proposed $f(Q, T)$ gravity (Xu et al. Eur. Phys. J. C \textbf{79} (2019) 708) is an extension of the symmetric teleparallel gravity. The gravitational action $L$ is given by an arbitrary function $f$ of the non-metricity $Q$ and the trace of the matter-energy momentum tensor $T$. In this paper, we examined... |
gr-qc/0611152 | Jiri Kovar | Jiri Kovar, Zdenek Stuchlik | Forces in Kerr spacetimes with a repulsive cosmological constant | null | Int.J.Mod.Phys.A21:4869-4897,2006 | 10.1142/S0217751X06032435 | null | gr-qc | null | Forces defined in the framework of optical reference geometry are introduced
in the case of stationary and axially symmetric Kerr black-hole and
naked-singularity spacetimes with a repulsive cosmological constant. Properties
of the forces acting on test particles moving along circular orbits in the
equatorial plane a... | [
{
"created": "Thu, 30 Nov 2006 01:07:43 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Nov 2006 23:10:45 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Kovar",
"Jiri",
""
],
[
"Stuchlik",
"Zdenek",
""
]
] | Forces defined in the framework of optical reference geometry are introduced in the case of stationary and axially symmetric Kerr black-hole and naked-singularity spacetimes with a repulsive cosmological constant. Properties of the forces acting on test particles moving along circular orbits in the equatorial plane are... |
1106.5296 | Subenoy Chakraborty | Ritabrata Biswas, Nairwita Mazumder, Subenoy Chakraborty | Quantum Tunnelling of non-zero mass particle and evolution of the
horizon for a static black hole | modifications needed | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we study Hawking radiation from a general static black hole due
to tunnelling of particle having nonzero mass. Hawking temperature has been
calculated using both the tunnelling method and the Hamilton-Jacobi method and
the results do no depend on the mass of the particle. Due to complicated form
of the ... | [
{
"created": "Mon, 27 Jun 2011 05:34:34 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Sep 2012 17:21:55 GMT",
"version": "v2"
}
] | 2012-10-01 | [
[
"Biswas",
"Ritabrata",
""
],
[
"Mazumder",
"Nairwita",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | In this work, we study Hawking radiation from a general static black hole due to tunnelling of particle having nonzero mass. Hawking temperature has been calculated using both the tunnelling method and the Hamilton-Jacobi method and the results do no depend on the mass of the particle. Due to complicated form of the eq... |
1006.0921 | Jeanette E. Nelson | J. E. Nelson and R. F. Picken | Quantum geometry from 2+1 AdS quantum gravity on the torus | 19 pages, 11 figures, revised with more explanations, improved
figures and extra figures. To appear GERG | Gen.Rel.Grav.43:777-795,2011 | 10.1007/s10714-010-1095-0 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Wilson observables for 2+1 quantum gravity with negative cosmological
constant, when the spatial manifold is a torus, exhibit several novel features:
signed area phases relate the observables assigned to homotopic loops, and
their commutators describe loop intersections, with properties that are not yet
fully underst... | [
{
"created": "Fri, 4 Jun 2010 15:33:49 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Sep 2010 16:04:55 GMT",
"version": "v2"
}
] | 2011-02-23 | [
[
"Nelson",
"J. E.",
""
],
[
"Picken",
"R. F.",
""
]
] | Wilson observables for 2+1 quantum gravity with negative cosmological constant, when the spatial manifold is a torus, exhibit several novel features: signed area phases relate the observables assigned to homotopic loops, and their commutators describe loop intersections, with properties that are not yet fully understoo... |
gr-qc/0007050 | Teviet Creighton | Teviet Creighton | Tumbleweeds and airborne gravitational noise sources for LIGO | 15 pages, 10 PostScript figures, uses REVTeX4.cls and epsfig.sty | Class.Quant.Grav.25:125011,2008 | 10.1088/0264-9381/25/12/125011 | null | gr-qc | null | Gravitational-wave detectors are sensitive not only to astrophysical
gravitational waves, but also to the fluctuating Newtonian gravitational forces
of moving masses in the ground and air around the detector. This paper studies
the gravitational effects of density perturbations in the atmosphere, and from
massive air... | [
{
"created": "Wed, 19 Jul 2000 22:22:41 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Jul 2000 23:54:16 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Creighton",
"Teviet",
""
]
] | Gravitational-wave detectors are sensitive not only to astrophysical gravitational waves, but also to the fluctuating Newtonian gravitational forces of moving masses in the ground and air around the detector. This paper studies the gravitational effects of density perturbations in the atmosphere, and from massive airbo... |
gr-qc/9901024 | Chris Isham | C.J.Isham and J. Butterfield | On the Emergence of Time in Quantum Gravity | To appear in ``The Arguments of Time'', ed. J. Butterfield, Oxford
University Press, 1999 | null | null | Imperial/TP/98--99/23 | gr-qc | null | We discuss from a philosophical perspective the way in which the normal
concept of time might be said to `emerge' in a quantum theory of gravity. After
an introduction, we briefly discuss the notion of emergence, without regard to
time (Section 2). We then introduce the search for a quantum theory of gravity
(Section... | [
{
"created": "Fri, 8 Jan 1999 14:02:35 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Isham",
"C. J.",
""
],
[
"Butterfield",
"J.",
""
]
] | We discuss from a philosophical perspective the way in which the normal concept of time might be said to `emerge' in a quantum theory of gravity. After an introduction, we briefly discuss the notion of emergence, without regard to time (Section 2). We then introduce the search for a quantum theory of gravity (Section 3... |
1311.1235 | Hirotada Okawa | Hirotada Okawa, Vitor Cardoso, Paolo Pani | Collapse of self-interacting fields in asymptotically flat spacetimes:
do self-interactions render Minkowski spacetime unstable? | 6 pages, 4 figures. v2: Convergence results added and overall
improvements to the manuscript. Accepted for publication in Phys.Rev.D [Rapid
Communications] | Phys. Rev. D 89, 041502 (2014) | 10.1103/PhysRevD.89.041502 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The nonlinear instability of anti-de Sitter spacetime has recently been
established with the striking result that generic initial data collapses to
form black holes. This outcome suggests that confined matter generically
collapses, and that collapse can only be halted -- at most -- by nonlinear
bound states. Here we ... | [
{
"created": "Tue, 5 Nov 2013 22:06:32 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Jan 2014 11:59:29 GMT",
"version": "v2"
}
] | 2014-03-05 | [
[
"Okawa",
"Hirotada",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Pani",
"Paolo",
""
]
] | The nonlinear instability of anti-de Sitter spacetime has recently been established with the striking result that generic initial data collapses to form black holes. This outcome suggests that confined matter generically collapses, and that collapse can only be halted -- at most -- by nonlinear bound states. Here we pr... |
1704.02888 | Jorge Alfaro | Jorge Alfaro and Pablo Gonz\'alez | $\tilde{\delta}$ Gravity, $\tilde{\delta}$ matter and the accelerated
expansion of the Universe | 24 pages,1 figure, latex. arXiv admin note: text overlap with
arXiv:1210.6107 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A gravitational field model based on two symmetric tensors, $g_{\mu \nu}$ and
$\tilde{g}_{\mu \nu}$, is presented. In this model, new matter fields are added
to the original matter fields, motivated by an additional symmetry
($\tilde{\delta}$ symmetry). We call them $\tilde{\delta}$ matter fields. We
find that massiv... | [
{
"created": "Fri, 7 Apr 2017 17:25:29 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Nov 2017 16:16:22 GMT",
"version": "v2"
}
] | 2017-11-06 | [
[
"Alfaro",
"Jorge",
""
],
[
"González",
"Pablo",
""
]
] | A gravitational field model based on two symmetric tensors, $g_{\mu \nu}$ and $\tilde{g}_{\mu \nu}$, is presented. In this model, new matter fields are added to the original matter fields, motivated by an additional symmetry ($\tilde{\delta}$ symmetry). We call them $\tilde{\delta}$ matter fields. We find that massive ... |
2406.18979 | Joao Magueijo | Raymond Isichei and Joao Magueijo | Attractive voids | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We explore the well know mass deficit/surplus phenomenon in General
Relativity to suggest that it could play a part in the dark matter conundrum.
Specifically in collapses and condensations of matter associated with negative
intrinsic curvature of the foliation associated with the asymptotic boundary
conditions, the ... | [
{
"created": "Thu, 27 Jun 2024 08:19:15 GMT",
"version": "v1"
}
] | 2024-06-28 | [
[
"Isichei",
"Raymond",
""
],
[
"Magueijo",
"Joao",
""
]
] | We explore the well know mass deficit/surplus phenomenon in General Relativity to suggest that it could play a part in the dark matter conundrum. Specifically in collapses and condensations of matter associated with negative intrinsic curvature of the foliation associated with the asymptotic boundary conditions, the ex... |
gr-qc/0612102 | Walter Christensen Jr. | Walter J. Christensen Jr | Normal Coordinates Describing Coupled Oscillations in the Gravitational
Field | General Relativity and Gravitation Ref.: Ms. No. GERG-D-06-00077R1
accepted for publication October 06, 2006 | Gen.Rel.Grav.39:105-110,2007 | 10.1007/s10714-006-0360-8 | null | gr-qc | null | The motion of a local source inducing small oscillations in the gravitational
field is investigated and shown to exhibit pure rotational kinetic energy.
Should the net affect of these slow, revolving oscillations cause large-scale
rotations in spacetime it would certainly result in anomalous celestial
accelerations. ... | [
{
"created": "Sat, 16 Dec 2006 22:51:45 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Jul 2007 00:54:15 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Christensen",
"Walter J.",
"Jr"
]
] | The motion of a local source inducing small oscillations in the gravitational field is investigated and shown to exhibit pure rotational kinetic energy. Should the net affect of these slow, revolving oscillations cause large-scale rotations in spacetime it would certainly result in anomalous celestial accelerations. Wh... |
gr-qc/0505139 | Jonn Miritzis | John Miritzis | The recollapse problem of closed FRW models in higher-order gravity
theories | 15 pages, 3 figures, submitted to JMP | J.Math.Phys. 46 (2005) 082502 | 10.1063/1.2009648 | null | gr-qc | null | We study the closed universe recollapse conjecture for positively curved FRW
models with a perfect fluid matter source and a scalar field which arises in
the conformal frame of the $R+\alpha R^{2}$ theory. By including ordinary
matter, we extend the analysis of a previous work. We analyze the structure of
the resulte... | [
{
"created": "Fri, 27 May 2005 08:21:41 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Miritzis",
"John",
""
]
] | We study the closed universe recollapse conjecture for positively curved FRW models with a perfect fluid matter source and a scalar field which arises in the conformal frame of the $R+\alpha R^{2}$ theory. By including ordinary matter, we extend the analysis of a previous work. We analyze the structure of the resulted ... |
gr-qc/0505131 | Sebastian Ng | S. Ng | Production of scalar particles in expanding spacetime | 8 pages, 3 figures. (Corrected topographic errors.) | null | null | null | gr-qc | null | In this paper, we investigate cosmological particle production using quantum
field theory (QFT). We will consider how production of scalar particles can
occur in an expanding universe. By introducing a time-dependent energy
parameter representing the time evolution of the universe, the initial vacuum
state will be ex... | [
{
"created": "Thu, 26 May 2005 17:59:18 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jun 2005 16:47:06 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Ng",
"S.",
""
]
] | In this paper, we investigate cosmological particle production using quantum field theory (QFT). We will consider how production of scalar particles can occur in an expanding universe. By introducing a time-dependent energy parameter representing the time evolution of the universe, the initial vacuum state will be exci... |
0811.3794 | Xiaoning Wu | Xiaoning Wu and Shan Bai | On Uniqueness of Kerr Space-time near null infinity | 15pages | Phys.Rev.D78:124009,2008 | 10.1103/PhysRevD.78.124009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We re-express the Kerr metric in standard Bondi-Saches' coordinate near null
infinity ${\cal I}^+$. Using the uniqueness result of characteristic initial
value problem, we prove the Kerr metric is the only asymptotic flat,
stationary, axial symmetric, Type-D solution of vacuum Einstein equation. The
Taylor series of ... | [
{
"created": "Mon, 24 Nov 2008 02:44:21 GMT",
"version": "v1"
}
] | 2008-12-30 | [
[
"Wu",
"Xiaoning",
""
],
[
"Bai",
"Shan",
""
]
] | We re-express the Kerr metric in standard Bondi-Saches' coordinate near null infinity ${\cal I}^+$. Using the uniqueness result of characteristic initial value problem, we prove the Kerr metric is the only asymptotic flat, stationary, axial symmetric, Type-D solution of vacuum Einstein equation. The Taylor series of Ke... |
1409.5119 | Hossein Mohseni Sadjadi | H. Mohseni Sadjadi and Parviz Goodarzi | Temperature in warm inflation in non minimal kinetic coupling model | 18 pages, major revision, accepted by the European Physical Journal C | Eur. Phys. J. C (2015) 75: 513 | 10.1140/epjc/s10052-015-3745-6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Warm inflation in the non minimal derivative coupling model with a general
dissipation coefficient is considered. We investigate conditions for the
existence of the slow roll approximation and study cosmological perturbations.
The spectral index, and the power spectrum are calculated and the temperature
of the univer... | [
{
"created": "Wed, 17 Sep 2014 17:34:30 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Oct 2015 15:47:03 GMT",
"version": "v2"
}
] | 2017-03-08 | [
[
"Sadjadi",
"H. Mohseni",
""
],
[
"Goodarzi",
"Parviz",
""
]
] | Warm inflation in the non minimal derivative coupling model with a general dissipation coefficient is considered. We investigate conditions for the existence of the slow roll approximation and study cosmological perturbations. The spectral index, and the power spectrum are calculated and the temperature of the universe... |
gr-qc/0209029 | Stefan Hollands | Stefan Hollands and Robert M. Wald | On the Renormalization Group in Curved Spacetime | Latex, 44pp, no figures | Commun.Math.Phys. 237 (2003) 123-160 | 10.1007/s00220-003-0837-1 | null | gr-qc hep-th math-ph math.MP | null | We define the renormalization group flow for a renormalizable interacting
quantum field in curved spacetime via its behavior under scaling of the
spacetime metric, $\g \to \lambda^2 \g$. We consider explicitly the case of a
scalar field, $\phi$, with a self-interaction of the form $\kappa \phi^4$,
although our result... | [
{
"created": "Mon, 9 Sep 2002 15:53:57 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Hollands",
"Stefan",
""
],
[
"Wald",
"Robert M.",
""
]
] | We define the renormalization group flow for a renormalizable interacting quantum field in curved spacetime via its behavior under scaling of the spacetime metric, $\g \to \lambda^2 \g$. We consider explicitly the case of a scalar field, $\phi$, with a self-interaction of the form $\kappa \phi^4$, although our results ... |
1802.09628 | Massimo Tinto | Massimo Tinto | Gravitational Wave Searches with Pulsar Timing Arrays. I: Cancellation
of Clock and Ephemeris Noises | Article submitted to Physical Review D. It is 26 pages long and
includes 2 figures | Phys. Rev. D 97, 084047 (2018) | 10.1103/PhysRevD.97.084047 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a data processing technique to cancel monopole and dipole noise
sources (such as clock and ephemeris noises respectively) in pulsar timing
array searches for gravitational radiation. These noises are the dominant
sources of correlated timing fluctuations in the lower-part ($ \approx 10^{-9}
- 10^{-8}$ Hz) ... | [
{
"created": "Mon, 26 Feb 2018 22:11:33 GMT",
"version": "v1"
}
] | 2018-05-02 | [
[
"Tinto",
"Massimo",
""
]
] | We propose a data processing technique to cancel monopole and dipole noise sources (such as clock and ephemeris noises respectively) in pulsar timing array searches for gravitational radiation. These noises are the dominant sources of correlated timing fluctuations in the lower-part ($ \approx 10^{-9} - 10^{-8}$ Hz) of... |
gr-qc/9605060 | Jonathan Wilson | C J S Clarke, J A Vickers and J P Wilson (Department of Mathematics,
University of Southampton, Southampton, UK.) | Generalised Functions and Distributional Curvature of Cosmic Strings | 11 pages, plain TeX | Class.Quant.Grav. 13 (1996) 2485-2498 | 10.1088/0264-9381/13/9/013 | null | gr-qc | null | A new method is presented for assigning distributional curvature, in an
invariant manner, to a space-time of low differentiability, using the
techniques of Colombeau's `new generalised functions'. The method is applied to
show that curvature of a cone is equivalent to a delta function. The same is
true under small en... | [
{
"created": "Tue, 28 May 1996 12:58:46 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Clarke",
"C J S",
"",
"Department of Mathematics,\n University of Southampton, Southampton, UK."
],
[
"Vickers",
"J A",
"",
"Department of Mathematics,\n University of Southampton, Southampton, UK."
],
[
"Wilson",
"J P",
"",
"Department of Mathematics,\n ... | A new method is presented for assigning distributional curvature, in an invariant manner, to a space-time of low differentiability, using the techniques of Colombeau's `new generalised functions'. The method is applied to show that curvature of a cone is equivalent to a delta function. The same is true under small enou... |
1607.06389 | Diego S\'aez-G\'omez | Jose Beltran Jimenez, Diego Rubiera-Garcia, Diego Saez-Gomez and
Vincenzo Salzano | Cosmological future singularities in interacting dark energy models | 12 pages, 3 figures, title changed, analysis extended, to be
published in PRD | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of interactions between dark matter and dark energy has been
widely studied, since they can fit well the observational data and may provide
new physics through such an interaction. In this work we analyze these models
and investigate their potential relation with future cosmological
singularities. We fi... | [
{
"created": "Thu, 21 Jul 2016 16:53:18 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Dec 2016 10:18:42 GMT",
"version": "v2"
}
] | 2016-12-06 | [
[
"Jimenez",
"Jose Beltran",
""
],
[
"Rubiera-Garcia",
"Diego",
""
],
[
"Saez-Gomez",
"Diego",
""
],
[
"Salzano",
"Vincenzo",
""
]
] | The existence of interactions between dark matter and dark energy has been widely studied, since they can fit well the observational data and may provide new physics through such an interaction. In this work we analyze these models and investigate their potential relation with future cosmological singularities. We find... |
gr-qc/0111025 | J. Alberto Lobo | J. Alberto Lobo | Hollow sphere, a flexible multimode Gravitational Wave antenna | 6 pages, 2 figures, LaTeX2e, requires CQG style files. To appear in
the Proceedings of the Amaldi-4 Conference, held at Perth (Australia) in july
2001 | Class.Quant.Grav. 19 (2002) 2029-2034 | 10.1088/0264-9381/19/7/409 | null | gr-qc | null | Hollow spheres have the same theoretical capabilities as the usual solid
ones, since they share identical symmetries. The hollow sphere is however more
flexible, as thickness is an additional parameter one can vary to approach
given specifications. I will briefly discuss the more relevant properties of
the hollow sph... | [
{
"created": "Thu, 8 Nov 2001 15:33:50 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Lobo",
"J. Alberto",
""
]
] | Hollow spheres have the same theoretical capabilities as the usual solid ones, since they share identical symmetries. The hollow sphere is however more flexible, as thickness is an additional parameter one can vary to approach given specifications. I will briefly discuss the more relevant properties of the hollow spher... |
1108.4367 | Richard Woodard | P. J. Mora (University of Florida), N. C. Tsamis (University of Crete)
and R. P. Woodard (University of Florida) | Generalizing the ADM Computation to Quantum Field Theory | 42 pages, 8 figures, 1 table, uses LaTeX2e | null | 10.1088/0264-9381/29/2/025001 | UFIFT-QG-11-07 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The absence of recognizable, low energy quantum gravitational effects
requires that some asymptotic series expansion be wonderfully accurate, but the
correct expansion might involve logarithms or fractional powers of Newton's
constant. That would explain why conventional perturbation theory shows
uncontrollable ultra... | [
{
"created": "Mon, 22 Aug 2011 16:14:54 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Mora",
"P. J.",
"",
"University of Florida"
],
[
"Tsamis",
"N. C.",
"",
"University of Crete"
],
[
"Woodard",
"R. P.",
"",
"University of Florida"
]
] | The absence of recognizable, low energy quantum gravitational effects requires that some asymptotic series expansion be wonderfully accurate, but the correct expansion might involve logarithms or fractional powers of Newton's constant. That would explain why conventional perturbation theory shows uncontrollable ultravi... |
2110.13070 | Bayram Tekin | Aydin Tavlayan and Bayram Tekin | Spherical timelike orbits around Kerr black holes | 13 pages, 21 figures | null | 10.1103/PhysRevD.104.124059 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the order ten polynomial equation satisfied by the radius of the
spherical timelike orbits for a massive particle with a generic energy around a
Kerr black hole. Even though the radii of the prograde and retrograde orbits at
the equatorial or polar plane for particles with zero or unit energy have a
monotoni... | [
{
"created": "Mon, 25 Oct 2021 16:07:25 GMT",
"version": "v1"
}
] | 2022-01-05 | [
[
"Tavlayan",
"Aydin",
""
],
[
"Tekin",
"Bayram",
""
]
] | We study the order ten polynomial equation satisfied by the radius of the spherical timelike orbits for a massive particle with a generic energy around a Kerr black hole. Even though the radii of the prograde and retrograde orbits at the equatorial or polar plane for particles with zero or unit energy have a monotonic ... |
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