id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1903.07735 | Andreas G. A. Pithis | Andreas G. A. Pithis | Aspects of quantum gravity | Ph.D. Thesis, University of London, King's College (Supervisor: Prof.
Mairi Sakellariadou), 357 pages, 51 figures; originally submitted in
September 2018; detailed abstract in the file; largely based on the
publications: arXiv:1402.2274, 1606.00352, 1607.06662, 1612.02456,
1709.00994, 1806.09961 and 1808.09765 | null | null | null | gr-qc hep-ph hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For more than 80 years theoretical physicists have been trying to develop a
theory of quantum gravity which would successfully combine the tenets of
Einstein's theory of general relativity (GR) together with those of quantum
field theory. At the current stage, there are various competing responses to
this challenge u... | [
{
"created": "Mon, 18 Mar 2019 21:38:29 GMT",
"version": "v1"
}
] | 2019-03-20 | [
[
"Pithis",
"Andreas G. A.",
""
]
] | For more than 80 years theoretical physicists have been trying to develop a theory of quantum gravity which would successfully combine the tenets of Einstein's theory of general relativity (GR) together with those of quantum field theory. At the current stage, there are various competing responses to this challenge und... |
1409.6708 | Xian Gao | Xian Gao | Hamiltonian analysis of spatially covariant gravity | v1: 17 pages; v2: 15 pages, double column, Sec.II extended, comments
added, typos corrected | Phys. Rev. D 90, 104033 (2014) | 10.1103/PhysRevD.90.104033 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform the Hamiltonian constraint analysis for a wide class of gravity
theories that are invariant under spatial diffeomorphism. With very general
setup, we show that different from the general relativity, the primary and
secondary constraints associated with the lapse function $N$ become second
class, as long as... | [
{
"created": "Tue, 23 Sep 2014 19:28:08 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Oct 2014 19:00:24 GMT",
"version": "v2"
}
] | 2014-11-26 | [
[
"Gao",
"Xian",
""
]
] | We perform the Hamiltonian constraint analysis for a wide class of gravity theories that are invariant under spatial diffeomorphism. With very general setup, we show that different from the general relativity, the primary and secondary constraints associated with the lapse function $N$ become second class, as long as t... |
gr-qc/9607065 | Madore | J. Madore | Fuzzy Space-Time | 17 pages LaTex | null | 10.1139/cjp-75-6-385 | LPTHE Orsay 96/64 | gr-qc | null | A review is made of recent efforts to define linear connections and their
corresponding curvature within the context of noncommutative geometry. As an
application it is suggested that it is possible to identify the gravitational
field as a phenomenological manifestation of space-time commutation relations
and to ther... | [
{
"created": "Fri, 26 Jul 1996 09:08:06 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Madore",
"J.",
""
]
] | A review is made of recent efforts to define linear connections and their corresponding curvature within the context of noncommutative geometry. As an application it is suggested that it is possible to identify the gravitational field as a phenomenological manifestation of space-time commutation relations and to thereb... |
gr-qc/0503046 | Abel Camacho Mr. | Abel Camacho (Dept. Physics, Universidad Autonoma
Metropolitana--Iztapalapa) and A. Camacho-Galvan (DEP--Facultad de
Ingenieria, Universidad Nacional Autonoma de Mexico) | Quantum Measurements and the kappa--Poincare Group | Accepted in General Relativity and Gravitation. Dedicated to Alberto
Garcia on the occasion of his 60th. birthday | Gen.Rel.Grav. 37 (2005) 651-657 | 10.1007/s10714-005-0052-9 | null | gr-qc quant-ph | null | The possible description of the vacuum of quantum gravity through the so
called kappa--Poincare group is analyzed considering some of the consequences
of this symmetry in the path integral formulation of nonrelativistic quantum
theory. This study is carried out with two cases, firstly, a free particle, and
finally, t... | [
{
"created": "Thu, 10 Mar 2005 19:57:18 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Camacho",
"Abel",
"",
"Dept. Physics, Universidad Autonoma\n Metropolitana--Iztapalapa"
],
[
"Camacho-Galvan",
"A.",
"",
"DEP--Facultad de\n Ingenieria, Universidad Nacional Autonoma de Mexico"
]
] | The possible description of the vacuum of quantum gravity through the so called kappa--Poincare group is analyzed considering some of the consequences of this symmetry in the path integral formulation of nonrelativistic quantum theory. This study is carried out with two cases, firstly, a free particle, and finally, the... |
0812.3936 | Marc-Thierry Jaekel | Marc-Thierry Jaekel and Serge Reynaud | Mass, inertia and gravitation | 24 pages, Proc. School on Mass, Orleans (2008) | Mass and Motion in General Relativity, L. Blanchet, A. Spallicci
and B. Whiting Eds. (Springer,2011) 491 | 10.1007/978-90-481-3015-3 | LPTENS 08/67 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss some effects induced by quantum field fluctuations on mass,
inertia and gravitation. Recalling the problem raised by vacuum field
fluctuations with respect to inertia and gravitation, we show that vacuum
energy differences, such as Casimir energy, do contribute to inertia. Mass
behaves as a quantum observa... | [
{
"created": "Mon, 22 Dec 2008 15:46:59 GMT",
"version": "v1"
}
] | 2011-01-27 | [
[
"Jaekel",
"Marc-Thierry",
""
],
[
"Reynaud",
"Serge",
""
]
] | We discuss some effects induced by quantum field fluctuations on mass, inertia and gravitation. Recalling the problem raised by vacuum field fluctuations with respect to inertia and gravitation, we show that vacuum energy differences, such as Casimir energy, do contribute to inertia. Mass behaves as a quantum observabl... |
1806.10408 | Vladimir S. Manko | V. S. Manko and E. Ruiz | Metric for two arbitrary Kerr sources | 12 pages, 1 figure | null | 10.1016/j.physletb.2019.05.027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The full metric describing a stationary axisymmetric system of two arbitrary
Kerr sources, black holes or hyperextreme objects, located on the symmetry axis
and kept apart in equilibrium by a massless strut is presented in a concise
explicit form involving five physical parameters. The binary system composed of
a Sch... | [
{
"created": "Wed, 27 Jun 2018 10:54:09 GMT",
"version": "v1"
}
] | 2019-06-26 | [
[
"Manko",
"V. S.",
""
],
[
"Ruiz",
"E.",
""
]
] | The full metric describing a stationary axisymmetric system of two arbitrary Kerr sources, black holes or hyperextreme objects, located on the symmetry axis and kept apart in equilibrium by a massless strut is presented in a concise explicit form involving five physical parameters. The binary system composed of a Schwa... |
gr-qc/9905063 | Pascual-Sanchez J.-F. | J.-F. Pascual-S\'anchez | Cosmic acceleration: Inhomogeneity versus vacuum energy | LATEX, 7 pags, no figs, Honorable Mention in the 1999 Essay
Competition of the Gravity Research Foundation | Mod.Phys.Lett. A14 (1999) 1539-1544 | 10.1142/S0217732399001632 | null | gr-qc astro-ph | null | In this essay, I present an alternative explanation for the cosmic
acceleration which appears as a consequence of recent high redshift Supernova
data. In the usual interpretation, this cosmic acceleration is explained by the
presence of a positive cosmological constant or vacuum energy, in the
background of Friedmann... | [
{
"created": "Tue, 18 May 1999 19:39:30 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Pascual-Sánchez",
"J. -F.",
""
]
] | In this essay, I present an alternative explanation for the cosmic acceleration which appears as a consequence of recent high redshift Supernova data. In the usual interpretation, this cosmic acceleration is explained by the presence of a positive cosmological constant or vacuum energy, in the background of Friedmann m... |
gr-qc/0509015 | Carles Bona | C. Bona, J. Carot and C. Palenzuela-Luque | Almost-stationary motions and gauge conditions in General Relativity | Talk presented at the Spanish Relativity Meeting, September 6-10 2005
Revised version | Phys.Rev. D72 (2005) 124010 | 10.1103/PhysRevD.72.124010 | null | gr-qc | null | An almost-stationary gauge condition is proposed with a view to Numerical
Relativity applications. The time lines are defined as the integral curves of
the timelike solutions of the harmonic almost-Killing equation. This vector
equation is derived by a variational principle, by minimizing the deviations
from isometry... | [
{
"created": "Mon, 5 Sep 2005 08:20:59 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Dec 2005 12:16:39 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Bona",
"C.",
""
],
[
"Carot",
"J.",
""
],
[
"Palenzuela-Luque",
"C.",
""
]
] | An almost-stationary gauge condition is proposed with a view to Numerical Relativity applications. The time lines are defined as the integral curves of the timelike solutions of the harmonic almost-Killing equation. This vector equation is derived by a variational principle, by minimizing the deviations from isometry. ... |
2404.00090 | Veome Kapil | Veome Kapil, Luca Reali, Roberto Cotesta and Emanuele Berti | Systematic bias from waveform modeling for binary black hole populations
in next-generation gravitational wave detectors | 15 pages, 11 figures, 1 table. Matches the version published in Phys.
Rev. D 109, 104043 | Phys. Rev. D 109, 104043 (2024) | 10.1103/PhysRevD.109.104043 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Next-generation gravitational wave detectors such as the Einstein Telescope
and Cosmic Explorer will have increased sensitivity and observing volumes,
enabling unprecedented precision in parameter estimation. However, this
enhanced precision could also reveal systematic biases arising from waveform
modeling, which ma... | [
{
"created": "Fri, 29 Mar 2024 18:00:01 GMT",
"version": "v1"
},
{
"created": "Wed, 15 May 2024 17:16:59 GMT",
"version": "v2"
}
] | 2024-05-16 | [
[
"Kapil",
"Veome",
""
],
[
"Reali",
"Luca",
""
],
[
"Cotesta",
"Roberto",
""
],
[
"Berti",
"Emanuele",
""
]
] | Next-generation gravitational wave detectors such as the Einstein Telescope and Cosmic Explorer will have increased sensitivity and observing volumes, enabling unprecedented precision in parameter estimation. However, this enhanced precision could also reveal systematic biases arising from waveform modeling, which may ... |
1109.2693 | Abdollah Refaei | A. Refaei, M V. Takook | Scalar effective action in Krein space quantization | 11 pages | Mod.Phys.Lett. A Vol. 26, No. 1 (2011) 31--41 | 10.1142/S0217732311034505 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the \lambda\phi^4 scalar feld effective action, in the
one-loop approximation, is calculated by using the Krein space quantization. We
show that the effective action is naturally fnite and the singularity does not
appear in the theory. The physical interaction mass, the running coupling
constant and \b... | [
{
"created": "Tue, 13 Sep 2011 07:37:57 GMT",
"version": "v1"
}
] | 2011-09-14 | [
[
"Refaei",
"A.",
""
],
[
"Takook",
"M V.",
""
]
] | In this paper, the \lambda\phi^4 scalar feld effective action, in the one-loop approximation, is calculated by using the Krein space quantization. We show that the effective action is naturally fnite and the singularity does not appear in the theory. The physical interaction mass, the running coupling constant and \bet... |
1608.01598 | Parthapratim Pradhan | Parthapratim Pradhan | Logarithmic Corrections to the Black Hole Entropy Product of ${\cal
H}^{\pm}$ via Cardy Formula | EPL Style, 4 pages | EPL, 116 (2016) 50002 | 10.1209/0295-5075/116/50002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the logarithmic corrections to black hole (BH) entropy product of
${\cal H}^{\pm}$ \footnote{ ${\cal H}^{+}$ and ${\cal H}^{-}$ denote outer
(event) horizon and inner (Cauchy) horizons} by using \emph{Cardy
prescription}. We particularly apply this formula for \emph{BTZ BH}. We
speculate that the logarithm... | [
{
"created": "Thu, 4 Aug 2016 16:21:10 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Jan 2017 15:34:11 GMT",
"version": "v2"
}
] | 2017-01-13 | [
[
"Pradhan",
"Parthapratim",
""
]
] | We compute the logarithmic corrections to black hole (BH) entropy product of ${\cal H}^{\pm}$ \footnote{ ${\cal H}^{+}$ and ${\cal H}^{-}$ denote outer (event) horizon and inner (Cauchy) horizons} by using \emph{Cardy prescription}. We particularly apply this formula for \emph{BTZ BH}. We speculate that the logarithmic... |
1110.0687 | Cosimo Bambi | Cosimo Bambi | Can we constrain the maximum value for the spin parameter of the
super-massive objects in galactic nuclei without knowing their actual nature? | 5 pages, 2 figures. v2: some typos corrected | Phys.Lett.B705:5-8,2011 | 10.1016/j.physletb.2011.10.005 | IPMU11-0170; LMU-ASC-26-12 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In 4-dimensional General Relativity, black holes are described by the Kerr
solution and are subject to the bound $|a_*| \le 1$, where $a_*$ is the black
hole spin parameter. If current black hole candidates are not the black holes
predicted in General Relativity, this bound does not hold and $a_*$ might
exceed 1. In ... | [
{
"created": "Tue, 4 Oct 2011 13:55:58 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Oct 2011 14:52:18 GMT",
"version": "v2"
}
] | 2012-04-09 | [
[
"Bambi",
"Cosimo",
""
]
] | In 4-dimensional General Relativity, black holes are described by the Kerr solution and are subject to the bound $|a_*| \le 1$, where $a_*$ is the black hole spin parameter. If current black hole candidates are not the black holes predicted in General Relativity, this bound does not hold and $a_*$ might exceed 1. In th... |
gr-qc/0612121 | Michael Seifert | Michael D. Seifert and Robert M. Wald | A general variational principle for spherically symmetric perturbations
in diffeomorphism covariant theories | 13 pages; submitted to Phys. Rev. D. v2: changed formatting, added
conclusion, corrected sign conventions | Phys.Rev.D75:084029,2007 | 10.1103/PhysRevD.75.084029 | null | gr-qc | null | We present a general method for the analysis of the stability of static,
spherically symmetric solutions to spherically symmetric perturbations in an
arbitrary diffeomorphism covariant Lagrangian field theory. Our method involves
fixing the gauge and solving the linearized gravitational field equations to
eliminate t... | [
{
"created": "Tue, 19 Dec 2006 20:57:57 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Mar 2007 22:51:58 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Seifert",
"Michael D.",
""
],
[
"Wald",
"Robert M.",
""
]
] | We present a general method for the analysis of the stability of static, spherically symmetric solutions to spherically symmetric perturbations in an arbitrary diffeomorphism covariant Lagrangian field theory. Our method involves fixing the gauge and solving the linearized gravitational field equations to eliminate the... |
2012.10814 | Adamantia Zampeli | Adamantia Zampeli, Andronikos Paliathanasis | Quantization of inhomogeneous spacetimes with cosmological constant term | 11 pages, 2 figures | null | 10.1088/1361-6382/ac1209 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the Szekeres system with cosmological constant admits a
sufficient number of conservation laws, which allow to claim the integrability
of the system. The main novelty in this investigation is that we find that the
unique attractor of the Szekeres system is the isotropic inhomogeneous de
Sitter (-like) un... | [
{
"created": "Sat, 19 Dec 2020 23:30:58 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jun 2021 06:59:59 GMT",
"version": "v2"
}
] | 2021-08-11 | [
[
"Zampeli",
"Adamantia",
""
],
[
"Paliathanasis",
"Andronikos",
""
]
] | We show that the Szekeres system with cosmological constant admits a sufficient number of conservation laws, which allow to claim the integrability of the system. The main novelty in this investigation is that we find that the unique attractor of the Szekeres system is the isotropic inhomogeneous de Sitter (-like) univ... |
1004.0525 | Gabor Kunstatter | Jonathan Ziprick and Gabor Kunstatter | Quantum Corrected Spherical Collapse: A Phenomenological Framework | null | Phys.Rev.D82:044031,2010 | 10.1103/PhysRevD.82.044031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A phenomenological framework is presented for incorporating quantum gravity
motivated corrections into the dynamics of spherically symmetric collapse. The
effective equations are derived from a variational principle that guarantees
energy conservation and the existence of a Birkhoff theorem. The gravitational
potenti... | [
{
"created": "Sun, 4 Apr 2010 18:25:26 GMT",
"version": "v1"
}
] | 2015-03-14 | [
[
"Ziprick",
"Jonathan",
""
],
[
"Kunstatter",
"Gabor",
""
]
] | A phenomenological framework is presented for incorporating quantum gravity motivated corrections into the dynamics of spherically symmetric collapse. The effective equations are derived from a variational principle that guarantees energy conservation and the existence of a Birkhoff theorem. The gravitational potential... |
2207.08809 | Nader Inan | Nader A. Inan | A new approach to detecting gravitational waves via the coupling of
gravity to the zero-point energy of the phonon modes of a superconductor | arXiv admin note: substantial text overlap with arXiv:2207.08062 | International Journal of Modern Physics D, Vol. 26, No. 12 (2017) | 10.1142/S0218271817430313 | null | gr-qc cond-mat.supr-con | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The response of a superconductor to a gravitational wave is shown to obey a
London-like constituent equation. The Cooper pairs are described by the
Ginzburg-Landau free energy density embedded in curved spacetime. The lattice
ions are modeled by quantum harmonic oscillators characterized by quasi-energy
eigenvalues. ... | [
{
"created": "Sun, 17 Jul 2022 03:15:32 GMT",
"version": "v1"
}
] | 2022-07-20 | [
[
"Inan",
"Nader A.",
""
]
] | The response of a superconductor to a gravitational wave is shown to obey a London-like constituent equation. The Cooper pairs are described by the Ginzburg-Landau free energy density embedded in curved spacetime. The lattice ions are modeled by quantum harmonic oscillators characterized by quasi-energy eigenvalues. Th... |
1312.6731 | Bruno Coutinho Mundim | Bruno C. Mundim, Hiroyuki Nakano, Nicol\'as Yunes, Manuela Campanelli,
Scott C. Noble, Yosef Zlochower | Approximate black hole binary spacetime via asymptotic matching | 17 pages, 8 figures, 1 table. Appendix added to match published
version | Phys. Rev. D 89, 084008 - Published 9 April 2014 | 10.1103/PhysRevD.89.084008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a fully analytic, general relativistic, nonspinning black hole
binary spacetime that approximately solves the vacuum Einstein equations
everywhere in space and time for black holes sufficiently well separated. The
metric is constructed by asymptotically matching perturbed Schwarzschild
metrics near each ... | [
{
"created": "Tue, 24 Dec 2013 00:55:30 GMT",
"version": "v1"
},
{
"created": "Sat, 10 May 2014 13:23:21 GMT",
"version": "v2"
}
] | 2014-05-13 | [
[
"Mundim",
"Bruno C.",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Yunes",
"Nicolás",
""
],
[
"Campanelli",
"Manuela",
""
],
[
"Noble",
"Scott C.",
""
],
[
"Zlochower",
"Yosef",
""
]
] | We construct a fully analytic, general relativistic, nonspinning black hole binary spacetime that approximately solves the vacuum Einstein equations everywhere in space and time for black holes sufficiently well separated. The metric is constructed by asymptotically matching perturbed Schwarzschild metrics near each bl... |
2404.09698 | Dinesh Chandra Maurya | Dinesh Chandra Maurya, K. Yesmakhanova, R. Myrzakulov, G. Nugmanova | Myrzakulov $F(T,Q)$ gravity: cosmological implications and constraints | 33 pages, 11 figures. arXiv admin note: text overlap with
arXiv:2403.11604 | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | In this paper, we investigate some exact cosmological models in Myrzakulov
$F(T,Q)$ gravity or the Myrzakulov gravity-III (MG-III) proposed in
[arXiv:1205.5266], with observational constraints. The MG-III gravity is some
kind of unification of two known gravity theories, namely, the $F(T)$ gravity
and the $F(Q)$ grav... | [
{
"created": "Mon, 15 Apr 2024 11:59:36 GMT",
"version": "v1"
}
] | 2024-04-16 | [
[
"Maurya",
"Dinesh Chandra",
""
],
[
"Yesmakhanova",
"K.",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Nugmanova",
"G.",
""
]
] | In this paper, we investigate some exact cosmological models in Myrzakulov $F(T,Q)$ gravity or the Myrzakulov gravity-III (MG-III) proposed in [arXiv:1205.5266], with observational constraints. The MG-III gravity is some kind of unification of two known gravity theories, namely, the $F(T)$ gravity and the $F(Q)$ gravit... |
gr-qc/9509006 | Jun'ichi Yokoyama | Jun'ichi Yokoyama (YITP Uji Research Center, Kyoto U.) | Density Fluctuations in Inflationary Models with Multiple Scalar Fields | 17 pages, To be published in Proc. Sixth Quantum Gravity Seminar
(Moscow) | null | null | YITP/U-95-25 | gr-qc | null | Making use of the primordially isocurvature fluctuations, which are generated
in inflationary models with multiple scalar fields, we make a phenomenological
model that predicts formation of primordial black holes which can account for
the massive compact halo objects recently observed.
| [
{
"created": "Wed, 6 Sep 1995 01:39:14 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Yokoyama",
"Jun'ichi",
"",
"YITP Uji Research Center, Kyoto U."
]
] | Making use of the primordially isocurvature fluctuations, which are generated in inflationary models with multiple scalar fields, we make a phenomenological model that predicts formation of primordial black holes which can account for the massive compact halo objects recently observed. |
1002.3581 | Khalid Saifullah | M. Akbar and K. Saifullah | Quantum corrections to the entropy of charged rotating black holes | null | Eur. Phys. J. C Vol 67 (2010) 205 | 10.1140/epjc/s10052-010-1279-5 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hawking radiation from a black hole can be viewed as quantum tunneling of
particles through the event horizon. Using this approach we provide a general
framework for studying corrections to the entropy of black holes beyond
semiclassical approximations. Applying the properties of exact differentials
for three variabl... | [
{
"created": "Thu, 18 Feb 2010 17:29:25 GMT",
"version": "v1"
}
] | 2015-05-18 | [
[
"Akbar",
"M.",
""
],
[
"Saifullah",
"K.",
""
]
] | Hawking radiation from a black hole can be viewed as quantum tunneling of particles through the event horizon. Using this approach we provide a general framework for studying corrections to the entropy of black holes beyond semiclassical approximations. Applying the properties of exact differentials for three variables... |
gr-qc/0111100 | Marcelo S. Berman | Marcelo S. Berman and Luis A. Trevisan | Amplification of Gravitational Waves During Inflation in Brans-Dicke
Theory | Submtted to Physical Review D15. Date of receipt 31 August 2001 | null | null | null | gr-qc | null | We show that Gravitational Waves are exponetially amplified in the
inflationary phase in Brans-Dicke theory, so that it would be possible to
detect them and in this way verify several features of physical reality.
| [
{
"created": "Wed, 28 Nov 2001 17:07:29 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Dec 2001 14:35:47 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Berman",
"Marcelo S.",
""
],
[
"Trevisan",
"Luis A.",
""
]
] | We show that Gravitational Waves are exponetially amplified in the inflationary phase in Brans-Dicke theory, so that it would be possible to detect them and in this way verify several features of physical reality. |
gr-qc/0105094 | Christian Heinicke | Christian Heinicke, Friedrich W. Hehl (University of Cologne) | Computer algebra in gravity | 10 pages, LaTeX2e, hyperref, updated version of an article to appear
in: Computer Algebra Handbook. J. Grabmeier, E. Kaltofen, V. Weispfennig,
editors (Springer, Berlin 2001/2002) | null | null | null | gr-qc | null | We survey the application of computer algebra in the context of gravitational
theories. After some general remarks, we show of how to check the second
Bianchi-identity by means of the Reduce package Excalc. Subsequently we list
some computer algebra systems and packages relevant to applications in
gravitational physi... | [
{
"created": "Fri, 25 May 2001 12:34:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Heinicke",
"Christian",
"",
"University of Cologne"
],
[
"Hehl",
"Friedrich W.",
"",
"University of Cologne"
]
] | We survey the application of computer algebra in the context of gravitational theories. After some general remarks, we show of how to check the second Bianchi-identity by means of the Reduce package Excalc. Subsequently we list some computer algebra systems and packages relevant to applications in gravitational physics... |
1607.02115 | Alex H. Blin | Rafael Pav\~ao, Ricardo Faleiro, Alex H. Blin, Brigitte Hiller | Entanglement of Vacuum States With the de Sitter Horizon: Consequences
on Holographic Dark Energy | changed layout style, minor typos corrected; 15 pages, 3 figures | null | null | null | gr-qc hep-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of this article is to study the effect of an Event Horizon on the
entanglement of the Quantum Vacuum and how entanglement, together with the
Holographic Principle, may explain the current value of the Cosmological
Constant, in light of recent theories. Entanglement is tested for vacuum states
very near and ve... | [
{
"created": "Thu, 7 Jul 2016 18:36:41 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jul 2016 10:24:41 GMT",
"version": "v2"
}
] | 2016-07-22 | [
[
"Pavão",
"Rafael",
""
],
[
"Faleiro",
"Ricardo",
""
],
[
"Blin",
"Alex H.",
""
],
[
"Hiller",
"Brigitte",
""
]
] | The aim of this article is to study the effect of an Event Horizon on the entanglement of the Quantum Vacuum and how entanglement, together with the Holographic Principle, may explain the current value of the Cosmological Constant, in light of recent theories. Entanglement is tested for vacuum states very near and very... |
gr-qc/9809064 | null | S.Sen and N.Banerjee | On the absence of scalar hair for charged rotating blackholes in non
minimally coupled theories | Revtex style, 11 pages, major rivisions done, appendix added, title
changed | Pramana, vol.56, 487 (2001) | 10.1007/s12043-001-0098-5 | null | gr-qc | null | In this work we check the validity of the no scalar hair theorem in charged
axisymmetric stationary black holes for a wide class of scalar tensor theories.
| [
{
"created": "Wed, 23 Sep 1998 12:04:08 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Sep 1998 11:39:47 GMT",
"version": "v2"
},
{
"created": "Sat, 20 Mar 1999 13:41:39 GMT",
"version": "v3"
},
{
"created": "Thu, 31 May 2001 09:58:28 GMT",
"version": "v4"
}
] | 2015-06-25 | [
[
"Sen",
"S.",
""
],
[
"Banerjee",
"N.",
""
]
] | In this work we check the validity of the no scalar hair theorem in charged axisymmetric stationary black holes for a wide class of scalar tensor theories. |
1312.3760 | Masato Minamitsuji | Masato Minamitsuji | Braneworlds with field derivative coupling to the Einstein tensor | 18 pages, 1 figure, comments and references added, the version to
appear in Physical Review D | null | 10.1103/PhysRevD.89.064025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the Randall-Sundrum type braneworld models in
the scalar-tensor theory with field derivative coupling to the Einstein tensor.
We first formulate the generalized junction conditions of the metric and the
scalar field on the timelike codimension-one hypersurface (=brane). With the
use of t... | [
{
"created": "Fri, 13 Dec 2013 10:29:21 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Feb 2014 18:07:23 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Minamitsuji",
"Masato",
""
]
] | In this paper, we investigate the Randall-Sundrum type braneworld models in the scalar-tensor theory with field derivative coupling to the Einstein tensor. We first formulate the generalized junction conditions of the metric and the scalar field on the timelike codimension-one hypersurface (=brane). With the use of the... |
1502.04036 | Debottam Nandi | Debottam Nandi, S. Shankaranarayanan (IISER-TVM) | 'Constraint consistency' at all orders in Cosmological perturbation
theory | 25 pages | JCAP 1508 (2015) no.08, 050 | 10.1088/1475-7516/2015/08/050 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the equivalence of two - order-by-order Einstein's equation and
Reduced action - approaches to cosmological perturbation theory at all orders
for different models of inflation. We point out a crucial consistency check
which we refer to as 'Constraint consistency' that needs to be satisfied. We
propose a quic... | [
{
"created": "Thu, 12 Feb 2015 16:02:23 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Oct 2015 16:45:20 GMT",
"version": "v2"
},
{
"created": "Sat, 18 Jun 2016 13:23:08 GMT",
"version": "v3"
}
] | 2016-06-21 | [
[
"Nandi",
"Debottam",
"",
"IISER-TVM"
],
[
"Shankaranarayanan",
"S.",
"",
"IISER-TVM"
]
] | We study the equivalence of two - order-by-order Einstein's equation and Reduced action - approaches to cosmological perturbation theory at all orders for different models of inflation. We point out a crucial consistency check which we refer to as 'Constraint consistency' that needs to be satisfied. We propose a quick ... |
1404.5729 | Aharon Davidson | Aharon Davidson and Ben Yellin | Quantum Black Hole Wave Packet: Average Area Entropy and Temperature
Dependent Width | 5 PRD pages, 1 figure; v.2 minor typo corrections | Phys. Lett. B 736, 267 (2014) | 10.1016/j.physletb.2014.07.032 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A quantum Schwarzschild black hole is described, at the mini super spacetime
level, by a non-singular wave packet composed of plane wave eigenstates of the
momentum Dirac-conjugate to the mass operator. The entropy of the mass spectrum
acquires then independent contributions from the average mass and the width.
Hence... | [
{
"created": "Wed, 23 Apr 2014 07:50:05 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Jun 2014 08:45:14 GMT",
"version": "v2"
}
] | 2014-08-11 | [
[
"Davidson",
"Aharon",
""
],
[
"Yellin",
"Ben",
""
]
] | A quantum Schwarzschild black hole is described, at the mini super spacetime level, by a non-singular wave packet composed of plane wave eigenstates of the momentum Dirac-conjugate to the mass operator. The entropy of the mass spectrum acquires then independent contributions from the average mass and the width. Hence, ... |
gr-qc/0105003 | Nematollah Riazi | N. Riazi | Spherical Structures in the Inflationary Cosmology | one figure | null | null | null | gr-qc | null | It has been suggested that wormholes and other non-trivial geometrical
structures might have been formed during the quantum cosmological era ($t\sim
10^{-43}$s). Subsequent inflation of the universe might have enlarged these
structures to macroscopic sizes. In this paper, spherical geometrical
structures in an inflat... | [
{
"created": "Wed, 2 May 2001 06:35:36 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Riazi",
"N.",
""
]
] | It has been suggested that wormholes and other non-trivial geometrical structures might have been formed during the quantum cosmological era ($t\sim 10^{-43}$s). Subsequent inflation of the universe might have enlarged these structures to macroscopic sizes. In this paper, spherical geometrical structures in an inflatio... |
2402.07657 | Riasat Ali | Riasat Ali, Xia Tiecheng, Rimsha Babar and Ali Ovgun | Evaluation of plasma on deflection angle and shadow by a black hole
solution immersed in perfect fluid in Rastall theory | 28 pages, 30 figures, submitted for publication | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The present study examines the gravitational deflection of particles in
curved space-times immersed in perfect fluid in the context of Rastall theory,
applying the Gibbons-Werner useful technique. In its application to integral
areas inside a four-dimensional space-time, the Gauss-Bonnet theorem studies
the computati... | [
{
"created": "Mon, 12 Feb 2024 13:59:19 GMT",
"version": "v1"
}
] | 2024-02-13 | [
[
"Ali",
"Riasat",
""
],
[
"Tiecheng",
"Xia",
""
],
[
"Babar",
"Rimsha",
""
],
[
"Ovgun",
"Ali",
""
]
] | The present study examines the gravitational deflection of particles in curved space-times immersed in perfect fluid in the context of Rastall theory, applying the Gibbons-Werner useful technique. In its application to integral areas inside a four-dimensional space-time, the Gauss-Bonnet theorem studies the computation... |
gr-qc/0207017 | Michael A. Ivanov | Michael A.Ivanov | A model of gravitation with global U(1)-symmetry | 7 pages | Gen.Rel.Grav. 31 (1999) 1431-1437 | 10.1023/A:1026749529917 | null | gr-qc | null | It is shown that an embedding of the general relativity $4-$space into a flat
$12-$space gives a model of gravitation with the global $U(1)-$symmetry and the
discrete $D_{1}-$one. The last one may be transformed into the $SU(2)-$symmetry
of the unified model, and the demand of independence of $U(1)-$ and
$SU(2)-$tran... | [
{
"created": "Tue, 2 Jul 2002 15:44:10 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Ivanov",
"Michael A.",
""
]
] | It is shown that an embedding of the general relativity $4-$space into a flat $12-$space gives a model of gravitation with the global $U(1)-$symmetry and the discrete $D_{1}-$one. The last one may be transformed into the $SU(2)-$symmetry of the unified model, and the demand of independence of $U(1)-$ and $SU(2)-$transf... |
gr-qc/9405071 | null | Sean A. Hayward | Quasi-Localisation of Bondi-Sachs Energy Loss | 13 pages | Class.Quant.Grav.11:3037-3048,1994 | 10.1088/0264-9381/11/12/017 | null | gr-qc | null | A formula is given for the variation of the Hawking energy along any
one-parameter foliation of compact spatial 2-surfaces. A surface for which one
null expansion is positive and the other negative has a preferred orientation,
with a spatial or null normal direction being called outgoing or ingoing as the
area increa... | [
{
"created": "Mon, 30 May 1994 08:17:43 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Hayward",
"Sean A.",
""
]
] | A formula is given for the variation of the Hawking energy along any one-parameter foliation of compact spatial 2-surfaces. A surface for which one null expansion is positive and the other negative has a preferred orientation, with a spatial or null normal direction being called outgoing or ingoing as the area increase... |
1202.3550 | Karl Landsteiner | Karl Landsteiner | The Sound of Strongly Coupled Field Theories: Quasinormal Modes In AdS | 16 pages, 8 figures, 1 cow, Contribution to Proceedings of ERE2011,
v2: minor changes, refs added | null | 10.1063/1.4734412 | IFT-UAM/CSIC-12-17 | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The AdS/CFT correspondence has developed over the last years into a very
useful and powerful tool for studying strongly coupled field theories at finite
temperature and density. Of particular interest is the regime of near
equilibrium real time evolution that can be captured via linear response
theory. The AdS/CFT co... | [
{
"created": "Thu, 16 Feb 2012 10:00:15 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Feb 2012 11:42:57 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Landsteiner",
"Karl",
""
]
] | The AdS/CFT correspondence has developed over the last years into a very useful and powerful tool for studying strongly coupled field theories at finite temperature and density. Of particular interest is the regime of near equilibrium real time evolution that can be captured via linear response theory. The AdS/CFT corr... |
1712.08680 | Nader Inan | R.Y. Chiao, J.S. Sharping, L.A. Martinez, B.S. Kang, A. Castelli, N.A.
Inan, and J.J. Thompson | Dynamical Casimir effect and the possibility of laser-like generation of
gravitational radiation | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we address the question as to whether or not measurable
sources for gravitational waves could possibly be made in the laboratory. Based
on an analogy of the dynamical Casimir effect with the stimulated emission of
radiation in the laser, our answer to this question is in the affirmative,
provided that ... | [
{
"created": "Fri, 22 Dec 2017 22:58:34 GMT",
"version": "v1"
}
] | 2017-12-27 | [
[
"Chiao",
"R. Y.",
""
],
[
"Sharping",
"J. S.",
""
],
[
"Martinez",
"L. A.",
""
],
[
"Kang",
"B. S.",
""
],
[
"Castelli",
"A.",
""
],
[
"Inan",
"N. A.",
""
],
[
"Thompson",
"J. J.",
""
]
] | In this paper, we address the question as to whether or not measurable sources for gravitational waves could possibly be made in the laboratory. Based on an analogy of the dynamical Casimir effect with the stimulated emission of radiation in the laser, our answer to this question is in the affirmative, provided that su... |
2308.01056 | Martina Muratore | Martina Muratore, Jonathan Gair, Lorenzo Speri | Impact of the noise knowledge uncertainty for the science exploitation
of cosmological and astrophysical stochastic gravitational wave background
with LISA | null | null | null | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | This paper investigates the impact of a lack of knowledge of the instrumental
noise on the characterisation of stochastic gravitational wave backgrounds with
the Laser Interferometer Space Antenna (LISA). We focus on constraints on
modelled backgrounds that represent the possible backgrounds from the mergers
of binar... | [
{
"created": "Wed, 2 Aug 2023 10:07:16 GMT",
"version": "v1"
}
] | 2023-08-03 | [
[
"Muratore",
"Martina",
""
],
[
"Gair",
"Jonathan",
""
],
[
"Speri",
"Lorenzo",
""
]
] | This paper investigates the impact of a lack of knowledge of the instrumental noise on the characterisation of stochastic gravitational wave backgrounds with the Laser Interferometer Space Antenna (LISA). We focus on constraints on modelled backgrounds that represent the possible backgrounds from the mergers of binary ... |
gr-qc/0508028 | Ezra Newman | Ezra T. Newman and Gilberto Silva-Ortigoza | Tensorial Spin-s Harmonics | null | Class.Quant.Grav. 23 (2006) 497-510 | 10.1088/0264-9381/23/2/014 | null | gr-qc | null | We show how to define and go from the spin-s spherical harmonics to the
tensorial spin-s harmonics. These quantities, which are functions on the sphere
taking values as Euclidean tensors, turn out to be extremely useful for many
calculations in General Relativity. In the calculations, products of these
functions, wit... | [
{
"created": "Mon, 8 Aug 2005 18:19:22 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Newman",
"Ezra T.",
""
],
[
"Silva-Ortigoza",
"Gilberto",
""
]
] | We show how to define and go from the spin-s spherical harmonics to the tensorial spin-s harmonics. These quantities, which are functions on the sphere taking values as Euclidean tensors, turn out to be extremely useful for many calculations in General Relativity. In the calculations, products of these functions, with ... |
2309.08071 | Arthur Suvorov Dr. | Arthur G. Suvorov and Kostas Glampedakis | Magnetic equilibria of relativistic axisymmetric stars: The impact of
flow constants | 20 pages, 6 figures. Minor changes to match published version | Phys. Rev. D 108, 084006 (2023) | 10.1103/PhysRevD.108.084006 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Symmetries and conservation laws associated with the ideal Einstein-Euler
system, for stationary and axisymmetric stars, can be utilized to define a set
of flow constants. These quantities are conserved along flow lines in the sense
that their gradients are orthogonal to the four-velocity. They are also
conserved alo... | [
{
"created": "Fri, 15 Sep 2023 00:02:36 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Oct 2023 22:53:29 GMT",
"version": "v2"
}
] | 2023-10-05 | [
[
"Suvorov",
"Arthur G.",
""
],
[
"Glampedakis",
"Kostas",
""
]
] | Symmetries and conservation laws associated with the ideal Einstein-Euler system, for stationary and axisymmetric stars, can be utilized to define a set of flow constants. These quantities are conserved along flow lines in the sense that their gradients are orthogonal to the four-velocity. They are also conserved along... |
1304.7730 | Francesco Caravelli | Francesco Caravelli | GEMs and amplitude bounds in the colored Boulatov model | 20 pages; 20 Figures; Style changed, discussion improved and typos
corrected, citations added; These GEMs are not related to "Global Embedding
Minkowskian spacetimes" | Journal of Theoretical and Applied Physics. 2013, 7:63 | 10.1186/2251-7235-7-63 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we construct a methodology for separating the divergencies due
to different topological manifolds dual to Feynman graphs in colored group
field theory. After having introduced the amplitude bounds using propagator
cuts, we show how Graph-Encoded-Manifolds (GEM) techniques can be used in order
to factori... | [
{
"created": "Mon, 29 Apr 2013 18:11:27 GMT",
"version": "v1"
},
{
"created": "Sat, 11 May 2013 23:48:21 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Oct 2013 14:01:02 GMT",
"version": "v3"
},
{
"created": "Fri, 4 Oct 2013 16:39:27 GMT",
"version": "v4"
},
{
"cre... | 2013-11-27 | [
[
"Caravelli",
"Francesco",
""
]
] | In this paper we construct a methodology for separating the divergencies due to different topological manifolds dual to Feynman graphs in colored group field theory. After having introduced the amplitude bounds using propagator cuts, we show how Graph-Encoded-Manifolds (GEM) techniques can be used in order to factorize... |
0708.2738 | Amitabh Virmani | Aaron J. Amsel, Donald Marolf, Amitabh Virmani | The Physical Process First Law for Bifurcate Killing Horizons | 19 pages; v2: ref added, minor changes | Phys.Rev.D77:024011,2008 | 10.1103/PhysRevD.77.024011 | null | gr-qc hep-th | null | The physical process version of the first law for black holes states that the
passage of energy and angular momentum through the horizon results in a change
in area $\frac{\kappa}{8 \pi} \Delta A = \Delta E - \Omega \Delta J$, so long
as this passage is quasi-stationary. A similar physical process first law can
be de... | [
{
"created": "Mon, 20 Aug 2007 21:50:07 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Oct 2007 21:00:39 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Amsel",
"Aaron J.",
""
],
[
"Marolf",
"Donald",
""
],
[
"Virmani",
"Amitabh",
""
]
] | The physical process version of the first law for black holes states that the passage of energy and angular momentum through the horizon results in a change in area $\frac{\kappa}{8 \pi} \Delta A = \Delta E - \Omega \Delta J$, so long as this passage is quasi-stationary. A similar physical process first law can be deri... |
2310.03769 | Hugo L\'evy | Hugo L\'evy, Jo\"el Berg\'e, Jean-Philippe Uzan | What to expect from scalar-tensor space geodesy | 36 pages, 20 figures. Accepted for publication in PRD | null | 10.1103/PhysRevD.109.084009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar-tensor theories with screening mechanisms come with non-linearities
that make it difficult to study setups of complex geometry without resorting to
numerical simulations. In this article, we use the $\textit{femtoscope}$ code
that we introduced in a previous work in order to compute the fifth force
arising in ... | [
{
"created": "Wed, 4 Oct 2023 18:03:09 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Apr 2024 07:28:29 GMT",
"version": "v2"
}
] | 2024-04-12 | [
[
"Lévy",
"Hugo",
""
],
[
"Bergé",
"Joël",
""
],
[
"Uzan",
"Jean-Philippe",
""
]
] | Scalar-tensor theories with screening mechanisms come with non-linearities that make it difficult to study setups of complex geometry without resorting to numerical simulations. In this article, we use the $\textit{femtoscope}$ code that we introduced in a previous work in order to compute the fifth force arising in th... |
1705.05304 | Mauricio Bellini | Juan Ignacio Musmarra, Mariano Anabitarte, Mauricio Bellini (IFIMAR -
CONICET & UNMdP) | Large scale solitonic back-reaction effects in pre-inflation | 9 pages, 1 figure. arXiv admin note: text overlap with
arXiv:1610.07979 | null | null | null | gr-qc hep-th physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using Relativistic Quantum Geometry (RQG), we study the emergence of
back-reaction modes with solitonic properties, on astrophysical and
cosmological scales, in a model of pre-inflation where the universe emerge from
a topological phase transition. We found that, modes of the geometrical field
that describes back-rea... | [
{
"created": "Mon, 15 May 2017 15:47:40 GMT",
"version": "v1"
}
] | 2017-05-18 | [
[
"Musmarra",
"Juan Ignacio",
"",
"IFIMAR -\n CONICET & UNMdP"
],
[
"Anabitarte",
"Mariano",
"",
"IFIMAR -\n CONICET & UNMdP"
],
[
"Bellini",
"Mauricio",
"",
"IFIMAR -\n CONICET & UNMdP"
]
] | Using Relativistic Quantum Geometry (RQG), we study the emergence of back-reaction modes with solitonic properties, on astrophysical and cosmological scales, in a model of pre-inflation where the universe emerge from a topological phase transition. We found that, modes of the geometrical field that describes back-react... |
1712.06504 | Eric Ling | Melanie Graf, Eric Ling | Maximizers in Lipschitz spacetimes are either timelike or null | 7 pages, 1 figure. Version 2 accepted to CQ&G | null | 10.1088/1361-6382/aab259 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that causal maximizers in $C^{0,1}$ spacetimes are either timelike
or null. This question was posed in [17] since bubbling regions in
$C^{0,\alpha}$ spacetimes ($\alpha <1$) can produce causal maximizers that
contain a segment which is timelike and a segment which is null, cf. [3]. While
$C^{0,1}$ spacetimes... | [
{
"created": "Mon, 18 Dec 2017 16:35:24 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Feb 2018 17:37:53 GMT",
"version": "v2"
}
] | 2018-03-28 | [
[
"Graf",
"Melanie",
""
],
[
"Ling",
"Eric",
""
]
] | We prove that causal maximizers in $C^{0,1}$ spacetimes are either timelike or null. This question was posed in [17] since bubbling regions in $C^{0,\alpha}$ spacetimes ($\alpha <1$) can produce causal maximizers that contain a segment which is timelike and a segment which is null, cf. [3]. While $C^{0,1}$ spacetimes d... |
1312.2022 | Alvaro de la Cruz-Dombriz | Alvaro de la Cruz-Dombriz, Peter K. S. Dunsby, Vinicius C. Busti and
Sulona Kandhai | On tidal forces in f(R) theories of gravity | 9 pages, 2 figures | null | 10.1103/PhysRevD.89.064029 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Despite the extraordinary attention that modified gravity theories have
attracted over the past decade, the geodesic deviation equation in this context
has not received proper formulation thus far. This equation provides an elegant
way to investigate the timelike, null and spacelike structure of spacetime
geometries.... | [
{
"created": "Fri, 6 Dec 2013 21:43:32 GMT",
"version": "v1"
}
] | 2015-06-18 | [
[
"de la Cruz-Dombriz",
"Alvaro",
""
],
[
"Dunsby",
"Peter K. S.",
""
],
[
"Busti",
"Vinicius C.",
""
],
[
"Kandhai",
"Sulona",
""
]
] | Despite the extraordinary attention that modified gravity theories have attracted over the past decade, the geodesic deviation equation in this context has not received proper formulation thus far. This equation provides an elegant way to investigate the timelike, null and spacelike structure of spacetime geometries. I... |
gr-qc/0304005 | Jose Wadih Maluf | J. W. Maluf | Dirac spinor fields in the teleparallel gravity: comment on
"Metric-affine approach to teleparallel gravity" | 8 pages, Latex file, no figures, to appear in the Phys. Rev. D as a
Comment | Phys.Rev. D67 (2003) 108501 | 10.1103/PhysRevD.67.108501 | null | gr-qc | null | We show that the coupling of a Dirac spinor field with the gravitational
field in the teleparallel equivalent of general relativity is consistent. For
an arbitrary SO(3,1) connection there are two possibilities for the coupling of
the spinor field with the gravitational field. The problems of consistency
raised by Y.... | [
{
"created": "Tue, 1 Apr 2003 13:01:46 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Maluf",
"J. W.",
""
]
] | We show that the coupling of a Dirac spinor field with the gravitational field in the teleparallel equivalent of general relativity is consistent. For an arbitrary SO(3,1) connection there are two possibilities for the coupling of the spinor field with the gravitational field. The problems of consistency raised by Y. N... |
gr-qc/0703145 | Robert Owen | Robert Owen | Constraint Damping in First-Order Evolution Systems for Numerical
Relativity | 11 pages, 5 figures | Phys.Rev.D76:044019,2007 | 10.1103/PhysRevD.76.044019 | null | gr-qc | null | A new constraint suppressing formulation of the Einstein evolution equations
is presented, generalizing the five-parameter first-order system due to Kidder,
Scheel and Teukolsky (KST). The auxiliary fields, introduced to make the KST
system first-order, are given modified evolution equations designed to drive
constra... | [
{
"created": "Thu, 29 Mar 2007 09:49:53 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Owen",
"Robert",
""
]
] | A new constraint suppressing formulation of the Einstein evolution equations is presented, generalizing the five-parameter first-order system due to Kidder, Scheel and Teukolsky (KST). The auxiliary fields, introduced to make the KST system first-order, are given modified evolution equations designed to drive constrain... |
2112.06302 | Alberto Garcia-Diaz | Alberto A. Garcia-Diaz | Stationary Rotating Black Hole Exact Solution within Einstein--Nonlinear
Electrodynamics | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The first exact rotating charged black hole solution to the
Einstein{nonlinear electrodynamics theory is reported. It is equipped with
mass, rotation parameter, electric and magnetic charges, and three parameters
due to the electrodynamics: beta is associated to the potential vectors A{mu}
and starP{nu}, and two cons... | [
{
"created": "Sun, 12 Dec 2021 19:15:06 GMT",
"version": "v1"
}
] | 2021-12-14 | [
[
"Garcia-Diaz",
"Alberto A.",
""
]
] | The first exact rotating charged black hole solution to the Einstein{nonlinear electrodynamics theory is reported. It is equipped with mass, rotation parameter, electric and magnetic charges, and three parameters due to the electrodynamics: beta is associated to the potential vectors A{mu} and starP{nu}, and two consta... |
1104.2669 | Francisco Lobo | Tiberiu Harko, Francisco S.N. Lobo, Shin'ichi Nojiri, Sergei D.
Odintsov | f(R,T) gravity | 14 pages. V2: minor corrections, to appear in PRD | Phys.Rev.D84:024020,2011 | 10.1103/PhysRevD.84.024020 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider f(R,T) modified theories of gravity, where the gravitational
Lagrangian is given by an arbitrary function of the Ricci scalar R and of the
trace of the stress-energy tensor T. We obtain the gravitational field
equations in the metric formalism, as well as the equations of motion for test
particles, which ... | [
{
"created": "Thu, 14 Apr 2011 05:47:38 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jun 2011 21:34:31 GMT",
"version": "v2"
}
] | 2011-07-14 | [
[
"Harko",
"Tiberiu",
""
],
[
"Lobo",
"Francisco S. N.",
""
],
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
]
] | We consider f(R,T) modified theories of gravity, where the gravitational Lagrangian is given by an arbitrary function of the Ricci scalar R and of the trace of the stress-energy tensor T. We obtain the gravitational field equations in the metric formalism, as well as the equations of motion for test particles, which fo... |
1907.01209 | Jing-Bo Wang | Jingbo Wang | Fractional charge of quasi-particles on the horizon of black holes | 6 pages, comments are welcome; There are some mistakes in section 2
and is replaced by arXiv:2011.05498 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the previous works, it was claimed that black holes can be considered as
topological insulators. In this paper, we will show that they are actually
fractional topological insulators. That is, the quasi-particles and quasi-holes
can have fractional charges and statistics (spins). For BTZ black hole, the
filling fra... | [
{
"created": "Tue, 2 Jul 2019 07:33:54 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Nov 2020 08:05:25 GMT",
"version": "v2"
}
] | 2020-11-13 | [
[
"Wang",
"Jingbo",
""
]
] | In the previous works, it was claimed that black holes can be considered as topological insulators. In this paper, we will show that they are actually fractional topological insulators. That is, the quasi-particles and quasi-holes can have fractional charges and statistics (spins). For BTZ black hole, the filling fract... |
1604.07604 | Waleed El Hanafy | Kazuharu Bamba, G.G.L. Nashed, W. El Hanafy and Sh.K. Ibraheem | Bounce inflation in $f(T)$ Cosmology: A unified inflaton-quintessence
field | 21 pages, 9 figures. An updated version to match the published
version. arXiv admin note: text overlap with arXiv:1509.08769 by other
authors | Phys. Rev. D 94, 083513 (2016) | 10.1103/PhysRevD.94.083513 | FU-PCG-14 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a bounce inflation model with a graceful exit into the
Friedmann-Robertson-Walker (FRW) decelerated Universe within $f(T)$ gravity
framework, where $T$ is the torsion scalar in the teleparallelism. We study the
cosmic thermal evolution, the model predicts a supercold Universe during the
precontraction ... | [
{
"created": "Tue, 26 Apr 2016 10:16:41 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Oct 2016 08:18:26 GMT",
"version": "v2"
}
] | 2016-10-13 | [
[
"Bamba",
"Kazuharu",
""
],
[
"Nashed",
"G. G. L.",
""
],
[
"Hanafy",
"W. El",
""
],
[
"Ibraheem",
"Sh. K.",
""
]
] | We investigate a bounce inflation model with a graceful exit into the Friedmann-Robertson-Walker (FRW) decelerated Universe within $f(T)$ gravity framework, where $T$ is the torsion scalar in the teleparallelism. We study the cosmic thermal evolution, the model predicts a supercold Universe during the precontraction ph... |
2405.03157 | Mauricio Gamonal | Eugenio Bianchi and Mauricio Gamonal | Primordial power spectrum at N3LO in effective theories of inflation | 25 pages, 4 figures, 7 tables; References added | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We develop a systematic framework to compute the primordial power spectrum up
to next-to-next-to-next to leading order (N3LO) in the Hubble-flow parameters
for a large class of effective theories of inflation. We assume that the
quadratic action for perturbations is characterized by two functions of time,
the kinetic... | [
{
"created": "Mon, 6 May 2024 04:25:55 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Aug 2024 21:05:32 GMT",
"version": "v2"
}
] | 2024-08-13 | [
[
"Bianchi",
"Eugenio",
""
],
[
"Gamonal",
"Mauricio",
""
]
] | We develop a systematic framework to compute the primordial power spectrum up to next-to-next-to-next to leading order (N3LO) in the Hubble-flow parameters for a large class of effective theories of inflation. We assume that the quadratic action for perturbations is characterized by two functions of time, the kinetic a... |
gr-qc/9511039 | Zoltan Perjes | Z. Perj\'es (KFKI Research Institute for Particle and Nuclear Physics,
Hungary), A. Kom\'arik (E\"otv\"os University, Hungary) | Perturbations of a Universe Filled with Dust and Radiation | 9 pp, typeset in latex | Int.J.Theor.Phys. 34 (1995) 2275-2284 | 10.1007/BF00673842 | null | gr-qc | null | A first-order perturbation approach to $k=0$ Friedmann cosmologies filled
with dust and radiation is developed. Adopting the coordinate gauge comoving
with the perturbed matter, and neglecting the vorticity of the radiation, a
pair of coupled equations is obtained for the trace $h$ of the metric
perturbations and for... | [
{
"created": "Mon, 13 Nov 1995 16:20:00 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Perjés",
"Z.",
"",
"KFKI Research Institute for Particle and Nuclear Physics,\n Hungary"
],
[
"Komárik",
"A.",
"",
"Eötvös University, Hungary"
]
] | A first-order perturbation approach to $k=0$ Friedmann cosmologies filled with dust and radiation is developed. Adopting the coordinate gauge comoving with the perturbed matter, and neglecting the vorticity of the radiation, a pair of coupled equations is obtained for the trace $h$ of the metric perturbations and for t... |
gr-qc/9803053 | Lee Lindblom | Lee Lindblom, Benjamin J. Owen, Sharon M. Morsink | Gravitational Radiation Instability in Hot Young Neutron Stars | 4 Pages, 2 Figures | Phys.Rev.Lett.80:4843-4846,1998 | 10.1103/PhysRevLett.80.4843 | GRP-495 | gr-qc | null | We show that gravitational radiation drives an instability in hot young
rapidly rotating neutron stars. This instability occurs primarily in the l=2
r-mode and will carry away most of the angular momentum of a rapidly rotating
star by gravitational radiation. On the timescale needed to cool a young
neutron star to ab... | [
{
"created": "Fri, 13 Mar 1998 22:09:33 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Lindblom",
"Lee",
""
],
[
"Owen",
"Benjamin J.",
""
],
[
"Morsink",
"Sharon M.",
""
]
] | We show that gravitational radiation drives an instability in hot young rapidly rotating neutron stars. This instability occurs primarily in the l=2 r-mode and will carry away most of the angular momentum of a rapidly rotating star by gravitational radiation. On the timescale needed to cool a young neutron star to abou... |
gr-qc/9703021 | Donald Marolf | James B. Hartle (Institute for Theoretical Physics, University of
California, Santa Barbara) and Donald Marolf (Department of Physics, Syracuse
University) | Comparing Formulations of Generalized Quantum Mechanics for
Reparametrization-Invariant Systems | 21 pages ReVTeX | Phys. Rev. D 56, 6247 (1997) | 10.1103/PhysRevD.56.6247 | UCSBTH-96-15, NSF-ITP-96-59 | gr-qc quant-ph | null | A class of decoherence schemes is described for implementing the principles
of generalized quantum theory in reparametrization-invariant `hyperbolic'
models such as minisuperspace quantum cosmology. The connection with
sum-over-histories constructions is exhibited and the physical equivalence or
inequivalence of diff... | [
{
"created": "Fri, 7 Mar 1997 17:39:27 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Hartle",
"James B.",
"",
"Institute for Theoretical Physics, University of\n California, Santa Barbara"
],
[
"Marolf",
"Donald",
"",
"Department of Physics, Syracuse\n University"
]
] | A class of decoherence schemes is described for implementing the principles of generalized quantum theory in reparametrization-invariant `hyperbolic' models such as minisuperspace quantum cosmology. The connection with sum-over-histories constructions is exhibited and the physical equivalence or inequivalence of differ... |
2208.00171 | Omar Mustafa | Omar Mustafa | Klein-Gordon particles in G\"odel-type Som-Raychaudhuri cosmic string
spacetime and the phenomenon of spacetime associated degeneracies | 13 pages, no figures | Phys. Scr. 98 (2023) 015302 | 10.1088/1402-4896/aca72b | null | gr-qc math-ph math.MP quant-ph | http://creativecommons.org/licenses/by/4.0/ | We argue that only exact, comprehensive, and explicit solutions for the
fundamental models, the Klein-Gordon (KG) oscillators and the KG-Coulomb, would
help to understand the effects of gravitational fields on the dynamics of such
quantum mechanical systems. In the current methodical proposal, the effects of
the grav... | [
{
"created": "Sat, 30 Jul 2022 09:06:51 GMT",
"version": "v1"
}
] | 2023-04-17 | [
[
"Mustafa",
"Omar",
""
]
] | We argue that only exact, comprehensive, and explicit solutions for the fundamental models, the Klein-Gordon (KG) oscillators and the KG-Coulomb, would help to understand the effects of gravitational fields on the dynamics of such quantum mechanical systems. In the current methodical proposal, the effects of the gravit... |
gr-qc/9803034 | Horst R. Beyer | Horst R. Beyer | On the Completeness of the Quasinormal Modes of the Poeschl-Teller
Potential | 22 pages, 2 figures, submitted to Comm. Math. Phys | Commun.Math.Phys. 204 (1999) 397-423 | 10.1007/s002200050651 | null | gr-qc | null | The completeness of the quasinormal modes of the wave equation with
Poeschl-Teller potential is investigated. A main result is that after a large
enough time $t_0$, the solutions of this equation corresponding to
$C^{\infty}$-data with compact support can be expanded uniformly in time with
respect to the quasinormal ... | [
{
"created": "Tue, 10 Mar 1998 14:11:42 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Beyer",
"Horst R.",
""
]
] | The completeness of the quasinormal modes of the wave equation with Poeschl-Teller potential is investigated. A main result is that after a large enough time $t_0$, the solutions of this equation corresponding to $C^{\infty}$-data with compact support can be expanded uniformly in time with respect to the quasinormal mo... |
2010.07560 | Masato Nozawa | Masato Nozawa | Static spacetimes haunted by a phantom scalar field II: dilatonic
charged solutions | 2 figures, 1 table, 33 pages; v2: refs added, to appear in PRD | Phys. Rev. D 103, 024004 (2021) | 10.1103/PhysRevD.103.024004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a method to generate static solutions in the Einstein-Maxwell
system with a (phantom) dilaton field in $n(\ge 4)$-dimensions, based upon the
symmetry of the target space for the nonlinear sigma model. Unlike the
conventional Einstein-Maxwell-dilaton system, there appears a critical value of
the coupling co... | [
{
"created": "Thu, 15 Oct 2020 07:18:00 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jan 2021 03:12:01 GMT",
"version": "v2"
}
] | 2021-01-13 | [
[
"Nozawa",
"Masato",
""
]
] | We present a method to generate static solutions in the Einstein-Maxwell system with a (phantom) dilaton field in $n(\ge 4)$-dimensions, based upon the symmetry of the target space for the nonlinear sigma model. Unlike the conventional Einstein-Maxwell-dilaton system, there appears a critical value of the coupling cons... |
gr-qc/9904043 | Wai-Mo Suen | Wai-Mo Suen | Impact of a Multi-TeraFlop Machine to Gravitational Physics | Prepared for presentation at the National Computational Science
Alliance User Advisory Council Meeting at NSF, June 1998, in support of the
funding of a NSF TeraFlop computer | null | null | null | gr-qc | null | A multi-TeraFlop/TeraByte machine will enable the application of the Einstein
theory of gravity to realistic astrophysical processes. Without the
computational power, the complexity of the Einstein theory restricts most
studies based on it to the quasi static/linear near-Newtonian regime of the
theory.
The applicat... | [
{
"created": "Mon, 19 Apr 1999 01:24:07 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Suen",
"Wai-Mo",
""
]
] | A multi-TeraFlop/TeraByte machine will enable the application of the Einstein theory of gravity to realistic astrophysical processes. Without the computational power, the complexity of the Einstein theory restricts most studies based on it to the quasi static/linear near-Newtonian regime of the theory. The application ... |
0803.0376 | Alessandra Corsi | The Virgo collaboration | Search for gravitational waves associated with GRB 050915a using the
Virgo detector | 26 pages, 10 figures | Class.Quant.Grav.25:225001,2008 | 10.1088/0264-9381/25/22/225001 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of the expected association between gamma-ray bursts and
gravitational waves, we present results of an analysis aimed to search for a
burst of gravitational waves in coincidence with gamma-ray burst 050915a. This
was a long duration gamma-ray burst detected by Swift during September 2005,
when the Vi... | [
{
"created": "Tue, 4 Mar 2008 07:04:57 GMT",
"version": "v1"
}
] | 2012-08-27 | [
[
"The Virgo collaboration",
"",
""
]
] | In the framework of the expected association between gamma-ray bursts and gravitational waves, we present results of an analysis aimed to search for a burst of gravitational waves in coincidence with gamma-ray burst 050915a. This was a long duration gamma-ray burst detected by Swift during September 2005, when the Virg... |
gr-qc/0202059 | Sean A. Hayward | Sean A. Hayward | Wormholes supported by pure ghost radiation | 3 revtex pages | Phys.Rev. D65 (2002) 124016 | 10.1103/PhysRevD.65.124016 | null | gr-qc | null | Traversible wormhole space-times are found as static, spherically symmetric
solutions to the Einstein equations with ingoing and outgoing pure ghost
radiation, i.e. pure radiation with negative energy density. Switching off the
radiation causes the wormhole to collapse to a Schwarzschild black hole.
| [
{
"created": "Sun, 17 Feb 2002 05:13:50 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Hayward",
"Sean A.",
""
]
] | Traversible wormhole space-times are found as static, spherically symmetric solutions to the Einstein equations with ingoing and outgoing pure ghost radiation, i.e. pure radiation with negative energy density. Switching off the radiation causes the wormhole to collapse to a Schwarzschild black hole. |
2311.10946 | Taotao Sui | Tao-Tao Sui, Zi-Liang Wang, and Wen-Di Guo | The effect of scalar hair on the charged black hole with the images from
accretions disk | 13 pages, 13figures | Eur. Phys. J. C 84, 441 (2024) | 10.1140/epjc/s10052-024-12807-5 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | In this paper, we investigate the optical properties of a charged black hole
with scalar hair (CSH) within the context of four-dimensional
Einstein-Maxwell-Dilaton gravity. To achieve this, we consider three distinct
toy models of thin accretion disks. The presence of dilaton coupling allows us
to express both the so... | [
{
"created": "Sat, 18 Nov 2023 02:51:12 GMT",
"version": "v1"
},
{
"created": "Mon, 6 May 2024 06:16:02 GMT",
"version": "v2"
}
] | 2024-05-07 | [
[
"Sui",
"Tao-Tao",
""
],
[
"Wang",
"Zi-Liang",
""
],
[
"Guo",
"Wen-Di",
""
]
] | In this paper, we investigate the optical properties of a charged black hole with scalar hair (CSH) within the context of four-dimensional Einstein-Maxwell-Dilaton gravity. To achieve this, we consider three distinct toy models of thin accretion disks. The presence of dilaton coupling allows us to express both the solu... |
1107.1464 | Tai-Zhuo Huang | Tai-Zhuo Huang, Yi Ling, Wen-Jian Pan, Yu Tian, and Xiao-Ning Wu | From Petrov-Einstein to Navier-Stokes in Spatially Curved Spacetime | 17 pages, references added, generalizing the metric form in part 3,
version published in JHEP | JHEP 1110:079,2011 | 10.1007/JHEP10(2011)079 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize the framework in arXiv:1104.5502 to the case that an embedding
may have a nonvanishing intrinsic curvature. Directly employing the Brown-York
stress tensor as the fundamental variables, we study the effect of finite
perturbations of the extrinsic curvature while keeping the intrinsic metric
fixed. We sh... | [
{
"created": "Thu, 7 Jul 2011 17:42:35 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jul 2011 16:28:00 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Oct 2011 16:05:08 GMT",
"version": "v3"
}
] | 2011-10-20 | [
[
"Huang",
"Tai-Zhuo",
""
],
[
"Ling",
"Yi",
""
],
[
"Pan",
"Wen-Jian",
""
],
[
"Tian",
"Yu",
""
],
[
"Wu",
"Xiao-Ning",
""
]
] | We generalize the framework in arXiv:1104.5502 to the case that an embedding may have a nonvanishing intrinsic curvature. Directly employing the Brown-York stress tensor as the fundamental variables, we study the effect of finite perturbations of the extrinsic curvature while keeping the intrinsic metric fixed. We show... |
1806.09616 | Utkarsh Kumar | Utkarsh Kumar and Sukanta Panda | Non-local cosmological models | null | null | 10.1088/1361-6382/ab4eb6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nonlocal cosmological models are studied extensively in recent times because
of their interesting cosmological consequences. In this paper, we have analyzed
background cosmology on a class of non-local models which are motivated by the
perturbative nature of gravity at infrared scale. We show that inflationary
soluti... | [
{
"created": "Mon, 25 Jun 2018 13:27:16 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Kumar",
"Utkarsh",
""
],
[
"Panda",
"Sukanta",
""
]
] | Nonlocal cosmological models are studied extensively in recent times because of their interesting cosmological consequences. In this paper, we have analyzed background cosmology on a class of non-local models which are motivated by the perturbative nature of gravity at infrared scale. We show that inflationary solution... |
gr-qc/0110054 | Jorge Pullin | Rodolfo Gambini and Jorge Pullin | Lorentz violations in canonical quantum gravity | 4 pages, Revtex. Talk given at CP01. To appear in proceedings | null | 10.1142/9789812778123_0005 | LSU-REL-101001 | gr-qc | null | This is a summary of a talk given at the CP01 meeting on possible Lorentz
anomalies in canonical quantum gravity. It briefly reviews some initial
explorations on the subject that have taken place recently, and should be only
be seen as a short pointer to the literature on the subject, mostly for
outsiders.
| [
{
"created": "Wed, 10 Oct 2001 18:06:18 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | This is a summary of a talk given at the CP01 meeting on possible Lorentz anomalies in canonical quantum gravity. It briefly reviews some initial explorations on the subject that have taken place recently, and should be only be seen as a short pointer to the literature on the subject, mostly for outsiders. |
2104.06258 | Yaser Ahmadi | Y. Ahmadi | De Sitter scalar-spinor interaction in Minkowski limit | 5 pages | International Journal of Modern Physics D, Vol. 29, No. 13,
2050092 (2020) | 10.1142/S0218271820500923 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The scalar-spinor interaction Lagrangian is presented by the Yukawa
potential. In dS ambient space formalism, the interaction Lagrangian of
scalar-spinor fields was obtained from a new transformation which is very
similar to the guage theory. The interaction of massless minimally coupled
scalar and spinor fields was ... | [
{
"created": "Sun, 4 Apr 2021 15:17:34 GMT",
"version": "v1"
}
] | 2021-04-14 | [
[
"Ahmadi",
"Y.",
""
]
] | The scalar-spinor interaction Lagrangian is presented by the Yukawa potential. In dS ambient space formalism, the interaction Lagrangian of scalar-spinor fields was obtained from a new transformation which is very similar to the guage theory. The interaction of massless minimally coupled scalar and spinor fields was in... |
1306.0903 | Marco Sampaio | Marco O. P. Sampaio | Radiation from a D-dimensional collision of shock waves: numerical
methods | Lecture notes from the NRHEP spring school held at IST-Lisbon, March
2013. Extra material and notebooks available online at
http://blackholes.ist.utl.pt/nrhep2/ To be published by IJMPA (V. Cardoso, L.
Gualtieri, C. Herdeiro and U. Sperhake, Eds., 2013) | null | 10.1142/S0217751X13400198 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a pedagogical introduction to the problem of evolving a head on
collision of two Aichelburg-Sexl gravitational shock waves in D-dimensions,
using perturbative techniques. We follow a constructive approach with examples,
going in some detail through: the set up of the exact initial conditions and
their prop... | [
{
"created": "Tue, 4 Jun 2013 20:00:03 GMT",
"version": "v1"
}
] | 2013-09-18 | [
[
"Sampaio",
"Marco O. P.",
""
]
] | We present a pedagogical introduction to the problem of evolving a head on collision of two Aichelburg-Sexl gravitational shock waves in D-dimensions, using perturbative techniques. We follow a constructive approach with examples, going in some detail through: the set up of the exact initial conditions and their proper... |
2003.14136 | Sushant Ghosh Prof | Dharm Veer Singh, Sushant G. Ghosh and Sunil D. Maharaj | Clouds of strings in $4D$ Einstein-Gauss-Bonnet black holes | 12 pages, 4 figures, 2 tables, Phys.Dark Univ. 30 (2020) 100730 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently it has been shown that the Einstein-Gauss-Bonnet (EGB) gravity, by
rescaling the coupling constant as $\alpha/(D-4)$ and taking the limit $D
\rightarrow 4$ at the level of the equations of motion, becomes nontrivially
ghost-free in $4D$ - namely the novel $4D$ EGB gravity. We present an exact
charged black h... | [
{
"created": "Tue, 31 Mar 2020 12:17:03 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Apr 2020 12:11:58 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Sep 2020 06:41:08 GMT",
"version": "v3"
},
{
"created": "Mon, 14 Sep 2020 11:19:17 GMT",
"version": "v4"
},
{
"cr... | 2020-10-13 | [
[
"Singh",
"Dharm Veer",
""
],
[
"Ghosh",
"Sushant G.",
""
],
[
"Maharaj",
"Sunil D.",
""
]
] | Recently it has been shown that the Einstein-Gauss-Bonnet (EGB) gravity, by rescaling the coupling constant as $\alpha/(D-4)$ and taking the limit $D \rightarrow 4$ at the level of the equations of motion, becomes nontrivially ghost-free in $4D$ - namely the novel $4D$ EGB gravity. We present an exact charged black hol... |
2405.12640 | Han Yan | Han Yan, Xian Chen, Jinhai Zhang, Fan Zhang, Lijing Shao, Mengyao Wang | Constraining the stochastic gravitational wave background using the
future lunar seismometers | Accepted for publication in Physical Review D | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the old idea of using the moon as a resonant gravitational-wave
(GW) detector, as well as the recent updates in modeling the lunar response to
GWs, we re-evaluate the feasibility of using a network of lunar seismometers to
constrain the stochastic GW background (SGWB). In particular, using the updated
mo... | [
{
"created": "Tue, 21 May 2024 09:44:34 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jul 2024 07:41:03 GMT",
"version": "v2"
}
] | 2024-07-10 | [
[
"Yan",
"Han",
""
],
[
"Chen",
"Xian",
""
],
[
"Zhang",
"Jinhai",
""
],
[
"Zhang",
"Fan",
""
],
[
"Shao",
"Lijing",
""
],
[
"Wang",
"Mengyao",
""
]
] | Motivated by the old idea of using the moon as a resonant gravitational-wave (GW) detector, as well as the recent updates in modeling the lunar response to GWs, we re-evaluate the feasibility of using a network of lunar seismometers to constrain the stochastic GW background (SGWB). In particular, using the updated mode... |
2105.02683 | Vipin Dubey | Shikha Srivastava, Umesh Kumar Sharma, Vipin Chandra Dubey | Exploring the new Tsallis agegraphic dark energy with interaction
through statefinder | 19 pages, 14 figures | null | 10.1007/s10714-021-02818-y | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work, we explore the recently proposed new Tsallis agegraphic dark
energy model in a flat FLRW Universe by taking the conformal time as IR cutoff
with interaction. The deceleration parameter of the interacting new Tsallis
agegraphic dark energy model provides the phase transition of the Universe from
decelera... | [
{
"created": "Wed, 5 May 2021 14:47:18 GMT",
"version": "v1"
}
] | 2021-05-07 | [
[
"Srivastava",
"Shikha",
""
],
[
"Sharma",
"Umesh Kumar",
""
],
[
"Dubey",
"Vipin Chandra",
""
]
] | In this work, we explore the recently proposed new Tsallis agegraphic dark energy model in a flat FLRW Universe by taking the conformal time as IR cutoff with interaction. The deceleration parameter of the interacting new Tsallis agegraphic dark energy model provides the phase transition of the Universe from decelerate... |
2112.12659 | Jam Sadiq | Jam Sadiq, Thomas Dent, and Daniel Wysocki | Flexible and Fast Estimation of Binary Merger Population Distributions
with Adaptive KDE | 12 pages, 12 figures, update the paper using publically available
data for GWTC-3 BBH events to include some new results and update the peak
detection method | null | 10.1103/PhysRevD.105.123014 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The LIGO Scientific, Virgo and KAGRA Collaborations recently released the
third gravitational wave transient catalog or GWTC-3, significantly expanding
the number of gravitational wave (GW) signals. To address the -- still
uncertain -- formation channels of the source compact binaries, their
population properties mus... | [
{
"created": "Thu, 23 Dec 2021 15:51:24 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Feb 2022 10:12:45 GMT",
"version": "v2"
},
{
"created": "Wed, 25 May 2022 13:54:53 GMT",
"version": "v3"
}
] | 2022-06-29 | [
[
"Sadiq",
"Jam",
""
],
[
"Dent",
"Thomas",
""
],
[
"Wysocki",
"Daniel",
""
]
] | The LIGO Scientific, Virgo and KAGRA Collaborations recently released the third gravitational wave transient catalog or GWTC-3, significantly expanding the number of gravitational wave (GW) signals. To address the -- still uncertain -- formation channels of the source compact binaries, their population properties must ... |
1004.5050 | Francisco Navarro-Lerida | Masoud Allahverdizadeh, Jutta Kunz, and Francisco Navarro-Lerida | Extremal Charged Rotating Black Holes in Odd Dimensions | 24 pages, 3 figures | Phys.Rev.D82:024030,2010 | 10.1103/PhysRevD.82.024030 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Employing higher order perturbation theory, we obtain charged rotating black
holes in odd dimensions, where the Einstein-Maxwell Lagrangian may be
supplemented with a Chern-Simons term. Starting from the Myers-Perry solutions,
we use the electric charge as the perturbative parameter, and focus on extremal
black holes... | [
{
"created": "Wed, 28 Apr 2010 14:55:26 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Allahverdizadeh",
"Masoud",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Navarro-Lerida",
"Francisco",
""
]
] | Employing higher order perturbation theory, we obtain charged rotating black holes in odd dimensions, where the Einstein-Maxwell Lagrangian may be supplemented with a Chern-Simons term. Starting from the Myers-Perry solutions, we use the electric charge as the perturbative parameter, and focus on extremal black holes w... |
1904.12423 | Chen Songbai | Mingzhi Wang, Songbai Chen, Jieci Wang, and Jiliang Jing | Shadow of a Schwarzschild black hole surrounded by a Bach-Weyl ring | 16 pages,8 figures, the version published in EPJC | Eur. Phys. J. C (2020) 80:110 | 10.1140/epjc/s10052-020-7641-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have studied the shadows of a Schwarzschild black hole surrounded by a
Bach-Weyl ring through the backward ray-tracing method. The presence of
Bach-Weyl ring leads to that the photon dynamical system is non-integrable and
then chaos would appear in the photon motion, which affects sharply the black
hole shadow. Th... | [
{
"created": "Mon, 29 Apr 2019 02:19:13 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Mar 2020 13:35:20 GMT",
"version": "v2"
}
] | 2020-03-19 | [
[
"Wang",
"Mingzhi",
""
],
[
"Chen",
"Songbai",
""
],
[
"Wang",
"Jieci",
""
],
[
"Jing",
"Jiliang",
""
]
] | We have studied the shadows of a Schwarzschild black hole surrounded by a Bach-Weyl ring through the backward ray-tracing method. The presence of Bach-Weyl ring leads to that the photon dynamical system is non-integrable and then chaos would appear in the photon motion, which affects sharply the black hole shadow. The ... |
2303.10356 | Klaus Morawetz | K. Morawetz | Time behaviour of Hubble parameter by torsion | null | Modern Physics Letters A (2024) | 10.1142/S0217732323501924 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Consequences of the consistent exact solution of Einstein-Cartan equation on
the time dependence of Hubble parameter are discussed. The torsion leads to a
space and time dependent expansion parameter which results into nontrivial
windows of Hubble parameter between diverging behaviour. Only one window shows
a period ... | [
{
"created": "Sat, 18 Mar 2023 07:47:53 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jun 2023 10:00:16 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Feb 2024 07:48:33 GMT",
"version": "v3"
}
] | 2024-02-08 | [
[
"Morawetz",
"K.",
""
]
] | Consequences of the consistent exact solution of Einstein-Cartan equation on the time dependence of Hubble parameter are discussed. The torsion leads to a space and time dependent expansion parameter which results into nontrivial windows of Hubble parameter between diverging behaviour. Only one window shows a period of... |
gr-qc/0605016 | Satheesh Kumar V H | V H Satheesh Kumar and P K Suresh | Gravitons in Kaluza-Klein Theory | 12 pages | null | null | null | gr-qc | null | This is a pedagogical introduction to original Kaluza-Klein theory and its
salient features. Most of the technical calculations are given in detail and
the nature of gravitons is discussed.
| [
{
"created": "Tue, 2 May 2006 14:39:16 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kumar",
"V H Satheesh",
""
],
[
"Suresh",
"P K",
""
]
] | This is a pedagogical introduction to original Kaluza-Klein theory and its salient features. Most of the technical calculations are given in detail and the nature of gravitons is discussed. |
1909.11749 | Edgar Gasperin | Edgar Gasperin, Shalabh Gautam, David Hilditch, Alex
Va\~n\'o-Vi\~nuales | The Hyperboloidal Numerical Evolution of a Good-Bad-Ugly Wave Equation | 11 pages, 5 figures | null | 10.1088/1361-6382/ab5f21 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One method for the numerical treatment of future null-infinity is to decouple
coordinates from the tensor basis and choose each in a careful manner. This
dual-frame approach is hampered by logarithmically divergent terms that appear
in a naive choice of evolved variables. Here we consider a system of wave
equations t... | [
{
"created": "Wed, 25 Sep 2019 20:23:51 GMT",
"version": "v1"
}
] | 2020-01-29 | [
[
"Gasperin",
"Edgar",
""
],
[
"Gautam",
"Shalabh",
""
],
[
"Hilditch",
"David",
""
],
[
"Vañó-Viñuales",
"Alex",
""
]
] | One method for the numerical treatment of future null-infinity is to decouple coordinates from the tensor basis and choose each in a careful manner. This dual-frame approach is hampered by logarithmically divergent terms that appear in a naive choice of evolved variables. Here we consider a system of wave equations tha... |
1012.4467 | Matt Visser | Jozef Skakala (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | The causal structure of spacetime is a parameterized Randers geometry | 8 pages | Class.Quant.Grav.28:065007,2011 | 10.1088/0264-9381/28/6/065007 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is a by now well-established isomorphism between stationary
4-dimensional spacetimes and 3-dimensional purely spatial Randers geometries -
these Randers geometries being a particular case of the more general class of
3-dimensional Finsler geometries. We point out that in stably causal
spacetimes, by using the (... | [
{
"created": "Mon, 20 Dec 2010 21:00:06 GMT",
"version": "v1"
}
] | 2011-03-18 | [
[
"Skakala",
"Jozef",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | There is a by now well-established isomorphism between stationary 4-dimensional spacetimes and 3-dimensional purely spatial Randers geometries - these Randers geometries being a particular case of the more general class of 3-dimensional Finsler geometries. We point out that in stably causal spacetimes, by using the (ti... |
2306.05394 | Todd Fugleberg | Jesse Elder, Todd Fugleberg | Series Solution for Interaction of Scalar Plane Wave with Spatially
Decaying Gravitational Wave | 25 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we present the power series solution of the Klein-Gordon
equation in the spacetime background of a gravitational wave with amplitude
that decays with distance from the source. The resulting solution describes the
interaction of a scalar plane wave travelling in an arbitrary direction
relative to the dir... | [
{
"created": "Thu, 8 Jun 2023 17:45:55 GMT",
"version": "v1"
}
] | 2023-06-09 | [
[
"Elder",
"Jesse",
""
],
[
"Fugleberg",
"Todd",
""
]
] | In this paper we present the power series solution of the Klein-Gordon equation in the spacetime background of a gravitational wave with amplitude that decays with distance from the source. The resulting solution describes the interaction of a scalar plane wave travelling in an arbitrary direction relative to the direc... |
gr-qc/0005075 | Yungui Gong | Yungui Gong | Brane Universe and Standard Cosmology | 5 pages, no figure | null | null | utexas-hep-00-7 | gr-qc hep-th | null | Brane cosmology takes the unconventional form $H\sim \sqrt{\rho}$. To recover
the standard cosmology, we have to assume that the matter density is much less
than the brane tension. We show that the assumption can be justified even near
the end of inflation if we fine-tune the coupling constant of the inflaton
potenti... | [
{
"created": "Wed, 17 May 2000 17:14:22 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gong",
"Yungui",
""
]
] | Brane cosmology takes the unconventional form $H\sim \sqrt{\rho}$. To recover the standard cosmology, we have to assume that the matter density is much less than the brane tension. We show that the assumption can be justified even near the end of inflation if we fine-tune the coupling constant of the inflaton potential... |
gr-qc/0602102 | James M. Overduin | R.J. Adler, J.D. Bjorken and J.M. Overduin | Finite cosmology and a CMB cold spot | 20 pages, 12 figures | null | null | null | gr-qc astro-ph | null | The standard cosmological model posits a spatially flat universe of infinite
extent. However, no observation, even in principle, could verify that the
matter extends to infinity. In this work we model the universe as a finite
spherical ball of dust and dark energy, and obtain a lower limit estimate of
its mass and pr... | [
{
"created": "Fri, 24 Feb 2006 19:56:16 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Feb 2006 00:03:49 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Adler",
"R. J.",
""
],
[
"Bjorken",
"J. D.",
""
],
[
"Overduin",
"J. M.",
""
]
] | The standard cosmological model posits a spatially flat universe of infinite extent. However, no observation, even in principle, could verify that the matter extends to infinity. In this work we model the universe as a finite spherical ball of dust and dark energy, and obtain a lower limit estimate of its mass and pres... |
1212.4357 | Alessandro Nagar | Thibault Damour, Alessandro Nagar, Sebastiano Bernuzzi | Improved effective-one-body description of coalescing nonspinning
black-hole binaries and its numerical-relativity completion | 42 pages, 22 figures. Improved version, to appear in Phys. Rev. D.
The EOB code will be freely available at eob.ihes.fr | null | 10.1103/PhysRevD.87.084035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We improve the effective-one-body (EOB) description of nonspinning coalescing
black hole binaries by incorporating several recent analytical advances,
notably: (i) logarithmic contributions to the conservative dynamics; (ii)
resummed horizon-absorption contribution to the orbital angular momentum loss;
and (iii) a sp... | [
{
"created": "Tue, 18 Dec 2012 14:19:28 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Apr 2013 10:35:39 GMT",
"version": "v2"
}
] | 2013-04-17 | [
[
"Damour",
"Thibault",
""
],
[
"Nagar",
"Alessandro",
""
],
[
"Bernuzzi",
"Sebastiano",
""
]
] | We improve the effective-one-body (EOB) description of nonspinning coalescing black hole binaries by incorporating several recent analytical advances, notably: (i) logarithmic contributions to the conservative dynamics; (ii) resummed horizon-absorption contribution to the orbital angular momentum loss; and (iii) a spec... |
1207.1942 | Shijun Yoshida | Shijun Yoshida, Kenta Kiuchi, Masaru Shibata | Stably stratified magnetized stars in general relativity | 18 pages, 5 figures, accepted for publication in Physical Review D | null | 10.1103/PhysRevD.86.044012 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct magnetized stars composed of a fluid stably stratified by
entropy gradients in the framework of general relativity, assuming ideal
magnetohydrodynamics and employing a barotropic equation of state. We first
revisit basic equations for describing stably-stratified stationary
axisymmetric stars containing ... | [
{
"created": "Mon, 9 Jul 2012 04:17:25 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Yoshida",
"Shijun",
""
],
[
"Kiuchi",
"Kenta",
""
],
[
"Shibata",
"Masaru",
""
]
] | We construct magnetized stars composed of a fluid stably stratified by entropy gradients in the framework of general relativity, assuming ideal magnetohydrodynamics and employing a barotropic equation of state. We first revisit basic equations for describing stably-stratified stationary axisymmetric stars containing bo... |
2406.04611 | YuSen An | Quan-Xu Liu, Ya-Peng Hu, Tao-Tao Sui, Yu-Sen An | Superradiance of rotating black holes surrounded by dark matter | 14 pages, 5 figures,1 table | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In rotating black hole background surrounded by dark matter, we investigated
the super-radiant phenomenon of massive scalar field and its associated
instability.Using the method of asymptotic matching, we computed the
amplification factor of scalar wave scattering to assess the strength of
super-radiance. We discusse... | [
{
"created": "Fri, 7 Jun 2024 03:38:29 GMT",
"version": "v1"
}
] | 2024-06-10 | [
[
"Liu",
"Quan-Xu",
""
],
[
"Hu",
"Ya-Peng",
""
],
[
"Sui",
"Tao-Tao",
""
],
[
"An",
"Yu-Sen",
""
]
] | In rotating black hole background surrounded by dark matter, we investigated the super-radiant phenomenon of massive scalar field and its associated instability.Using the method of asymptotic matching, we computed the amplification factor of scalar wave scattering to assess the strength of super-radiance. We discussed ... |
1411.5411 | Bahram Mashhoon | B. Mashhoon | Nonlocal General Relativity | 23 pages; v:2 slightly expanded version. Dedicated to the memory of
M. Hossein Partovi (1941-2014) | Galaxies 3 (2015) 1-17 | null | null | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A brief account of the present status of the recent nonlocal generalization
of Einstein's theory of gravitation is presented. The main physical assumptions
that underlie this theory are described. We clarify the physical meaning and
significance of Weitzenb\"ock's torsion, and emphasize its intimate
relationship with... | [
{
"created": "Thu, 20 Nov 2014 01:04:25 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Dec 2014 19:56:46 GMT",
"version": "v2"
}
] | 2015-01-20 | [
[
"Mashhoon",
"B.",
""
]
] | A brief account of the present status of the recent nonlocal generalization of Einstein's theory of gravitation is presented. The main physical assumptions that underlie this theory are described. We clarify the physical meaning and significance of Weitzenb\"ock's torsion, and emphasize its intimate relationship with t... |
0909.1503 | Ragab Gad | Ragab M. Gad | Axially Symmetric Cosmological Mesonic Stiff Fluid Models in Lyra's
Geometry | 13 pages, no figures, typos corrected | Canadian Journal of Physics 89:(7) 773-778 (2011) | 10.1139/p11-055 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | In this paper, we obtained a new class of axially symmetric cosmological
mesonic stiff fluid models in the context of Lyra's geometry. Expressions for
the energy, pressure and the massless scalar field are derived by considering
the time dependent displacement field. We found that the mesonic scalar field
depends on ... | [
{
"created": "Tue, 8 Sep 2009 14:44:47 GMT",
"version": "v1"
},
{
"created": "Wed, 12 May 2010 12:11:16 GMT",
"version": "v2"
}
] | 2015-05-14 | [
[
"Gad",
"Ragab M.",
""
]
] | In this paper, we obtained a new class of axially symmetric cosmological mesonic stiff fluid models in the context of Lyra's geometry. Expressions for the energy, pressure and the massless scalar field are derived by considering the time dependent displacement field. We found that the mesonic scalar field depends on on... |
1612.04320 | Shahen Hacyan | S. Hacyan | Some remarks on the Bel-Robinson tensor and gravitational radiation | new version | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The asymptotic form of the Bel-Robinson tensor in the gravitational
radiation-zone is obtained in terms of the mass quadrupole of the source. A
comparison is made with the standard formula for the gravitational power
emission. The problem of a fully covariant description of gravitational
radiation in terms of this te... | [
{
"created": "Tue, 13 Dec 2016 19:05:57 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Jan 2017 18:48:32 GMT",
"version": "v2"
},
{
"created": "Thu, 16 Mar 2017 16:51:44 GMT",
"version": "v3"
}
] | 2017-03-17 | [
[
"Hacyan",
"S.",
""
]
] | The asymptotic form of the Bel-Robinson tensor in the gravitational radiation-zone is obtained in terms of the mass quadrupole of the source. A comparison is made with the standard formula for the gravitational power emission. The problem of a fully covariant description of gravitational radiation in terms of this tens... |
2008.08450 | Kimet Jusufi | Kimet Jusufi, Mustapha Azreg-A\"inou, Mubasher Jamil, Shao-Wen Wei,
Qiang Wu, Anzhong Wang | Quasinormal modes, quasiperiodic oscillations and shadow of rotating
regular black holes in non-minimally coupled Einstein-Yang-Mills theory | 25 pages, 17 figures, 7 tables | Phys. Rev. D 103, 024013 (2021) | 10.1103/PhysRevD.103.024013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we obtain an effective metric describing a regular and rotating
magnetic black hole (BH) solution with a Yang-Mills electromagnetic source in
Einstein-Yang-Mills (EYM) theory using the Newman--Janis algorithm via the
non-complexification radial coordinate procedure. We then study the BH shadow
and the q... | [
{
"created": "Tue, 18 Aug 2020 09:32:41 GMT",
"version": "v1"
}
] | 2021-01-08 | [
[
"Jusufi",
"Kimet",
""
],
[
"Azreg-Aïnou",
"Mustapha",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Wei",
"Shao-Wen",
""
],
[
"Wu",
"Qiang",
""
],
[
"Wang",
"Anzhong",
""
]
] | In this paper we obtain an effective metric describing a regular and rotating magnetic black hole (BH) solution with a Yang-Mills electromagnetic source in Einstein-Yang-Mills (EYM) theory using the Newman--Janis algorithm via the non-complexification radial coordinate procedure. We then study the BH shadow and the qua... |
0803.3447 | Charis Anastopoulos | C. Anastopoulos and B. L. Hu | Intrinsic and Fundamental Decoherence: Issues and Problems | 16 pages | Class.Quant.Grav.25:154003,2008 | 10.1088/0264-9381/25/15/154003 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the meaning of gravity-induced decoherence in quantum theory,
known as `intrinsic' or `fundamental' decoherence in the literature. We explore
a range of issues relevant to this problem, including the meaning of modified
uncertainty relations, the interpretations of the Planck scale, the distinction
bet... | [
{
"created": "Mon, 24 Mar 2008 19:36:43 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Anastopoulos",
"C.",
""
],
[
"Hu",
"B. L.",
""
]
] | We investigate the meaning of gravity-induced decoherence in quantum theory, known as `intrinsic' or `fundamental' decoherence in the literature. We explore a range of issues relevant to this problem, including the meaning of modified uncertainty relations, the interpretations of the Planck scale, the distinction betwe... |
gr-qc/9408011 | Marco | Marco Cavaglia` | Can the Interaction between Baby Universes Generate a Big Universe? | 4 pages, PLAIN-TEX, Ref: SISSA 104/94/A, to be published in Int. Jou.
Mod. Phys. D | Int.J.Mod.Phys. D3 (1994) 623-626 | 10.1142/S0218271894000757 | null | gr-qc | null | We explore a simple toy model of interacting universes to establish that a
small baby universe could become large ($\gg$ Planck length) if a third
quantization mechanism is taken into account.
| [
{
"created": "Tue, 9 Aug 1994 08:42:14 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Cavaglia`",
"Marco",
""
]
] | We explore a simple toy model of interacting universes to establish that a small baby universe could become large ($\gg$ Planck length) if a third quantization mechanism is taken into account. |
2005.12875 | Bo Wang | Bo Wang, Zhenyu Zhu, Ang Li, Wen Zhao | Comprehensive analysis of the tidal effect in gravitational waves and
implication for cosmology | 28 pages, 23 figures. Accepted for publication in ApJS | Astrophys. J. Suppl. S. 250, 6 (2020) | 10.3847/1538-4365/aba2f3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Detection of gravitational waves (GWs) produced by coalescence of compact
binaries provides a novel way to measure the luminosity distance of GW events.
Combining their redshift, they can act as standard sirens to constrain
cosmological parameters. For various GW detector networks in 2nd-generation
(2G), 2.5G and 3G,... | [
{
"created": "Tue, 26 May 2020 17:09:21 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Jun 2020 08:00:19 GMT",
"version": "v2"
},
{
"created": "Sun, 7 Jun 2020 10:28:30 GMT",
"version": "v3"
},
{
"created": "Wed, 8 Jul 2020 23:56:13 GMT",
"version": "v4"
}
] | 2020-08-28 | [
[
"Wang",
"Bo",
""
],
[
"Zhu",
"Zhenyu",
""
],
[
"Li",
"Ang",
""
],
[
"Zhao",
"Wen",
""
]
] | Detection of gravitational waves (GWs) produced by coalescence of compact binaries provides a novel way to measure the luminosity distance of GW events. Combining their redshift, they can act as standard sirens to constrain cosmological parameters. For various GW detector networks in 2nd-generation (2G), 2.5G and 3G, w... |
1812.07438 | Ludovic Ducobu | Y. Brihaye and L. Ducobu | Hairy black holes, boson stars and non-minimal coupling to curvature
invariants | 16 pages, 9 figures, Published version : Paper reorganized, Results
extended to discuss stability of the boson stars, Title modified | Physics Letters B, Volume 795, 10 August 2019, Pages 135-143 | 10.1016/j.physletb.2019.06.006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein-Klein-Gordon Lagrangian is supplemented by a non-minimal
coupling of the scalar field to specific geometric invariants : the
Gauss-Bonnet term and the Chern-Simons term. The non-minimal coupling is chosen
as a general quadratic polynomial in the scalar field and allows - depending on
the parameters - for... | [
{
"created": "Tue, 18 Dec 2018 15:40:37 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Aug 2019 08:53:02 GMT",
"version": "v2"
}
] | 2019-08-21 | [
[
"Brihaye",
"Y.",
""
],
[
"Ducobu",
"L.",
""
]
] | The Einstein-Klein-Gordon Lagrangian is supplemented by a non-minimal coupling of the scalar field to specific geometric invariants : the Gauss-Bonnet term and the Chern-Simons term. The non-minimal coupling is chosen as a general quadratic polynomial in the scalar field and allows - depending on the parameters - for l... |
1806.10986 | Prasanta Char | Prasanta Char, Sayak Datta | Relativistic tidal properties of superfluid neutron stars | Accepted for publication in Physical Review D | Phys. Rev. D 98, 084010 (2018) | 10.1103/PhysRevD.98.084010 | null | gr-qc astro-ph.HE nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the tidal deformability of a superfluid neutron star. We
calculate the equilibrium structure in the general relativistic two-fluid
formalism with entrainment effect where we take neutron superfluid as one fluid
and the other fluid is comprised of protons and electrons, making it a charge
neutral fluid.... | [
{
"created": "Thu, 28 Jun 2018 14:12:12 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Oct 2018 12:35:50 GMT",
"version": "v2"
}
] | 2018-10-10 | [
[
"Char",
"Prasanta",
""
],
[
"Datta",
"Sayak",
""
]
] | We investigate the tidal deformability of a superfluid neutron star. We calculate the equilibrium structure in the general relativistic two-fluid formalism with entrainment effect where we take neutron superfluid as one fluid and the other fluid is comprised of protons and electrons, making it a charge neutral fluid. W... |
1509.07357 | Amalya Khurshudyan | M. Khurshudyan, R. Myrzakulov | Late time attractors of some varying Chaplygin gas cosmological models | New section has been added. Old results have been updated. 19 pages,
4 figures | Symmetry 2021, 13(5), 769 | 10.3390/sym13050769 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The goal of this paper is to study new cosmological models where the dark
energy is a varying Chaplygin gas. This specific dark energy model with
non-linear EoS had been often discussed in modern cosmology. Contrary to
previous studies, we consider new forms of non-linear non-gravitational
interaction between dark ma... | [
{
"created": "Sun, 20 Sep 2015 14:01:45 GMT",
"version": "v1"
},
{
"created": "Sat, 1 May 2021 11:22:22 GMT",
"version": "v2"
}
] | 2021-05-04 | [
[
"Khurshudyan",
"M.",
""
],
[
"Myrzakulov",
"R.",
""
]
] | The goal of this paper is to study new cosmological models where the dark energy is a varying Chaplygin gas. This specific dark energy model with non-linear EoS had been often discussed in modern cosmology. Contrary to previous studies, we consider new forms of non-linear non-gravitational interaction between dark matt... |
2011.09930 | Ulf Leonhardt | Ulf Leonhardt | Cosmological horizons radiate | null | Europhys. Lett. 135, 10002 (2021) | 10.1209/0295-5075/ac0ecf | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | Gibbons and Hawking [Phys. Rev. D 15, 2738 (1977)] have shown that the
horizon of de Sitter space emits radiation in the same way as the event horizon
of the black hole. But actual cosmological horizons are not event horizons,
except in de Sitter space. Nevertheless, this paper proves Gibbons' and
Hawking's radiation... | [
{
"created": "Thu, 19 Nov 2020 16:12:45 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Nov 2020 14:56:59 GMT",
"version": "v2"
}
] | 2021-09-10 | [
[
"Leonhardt",
"Ulf",
""
]
] | Gibbons and Hawking [Phys. Rev. D 15, 2738 (1977)] have shown that the horizon of de Sitter space emits radiation in the same way as the event horizon of the black hole. But actual cosmological horizons are not event horizons, except in de Sitter space. Nevertheless, this paper proves Gibbons' and Hawking's radiation f... |
gr-qc/0211003 | Djordje Minic | Vijay Balasubramanian, Jan de Boer and Djordje Minic | Holography, Time and Quantum Mechanics | Talk presented at the 3rd Sakharov International Conference on
Physics, Moscow, June 2002; to appear in the proceedings of the conference | null | null | null | gr-qc hep-th | null | In this talk we entertain the possibility that the synthesis of general
covariance and quantum mechanics requires an extension of the basic kinematical
setup of quantum mechanics. According to the holographic principle, regions of
spacetime bounded by a finite area carry finite entropy. When we in addition
assume tha... | [
{
"created": "Fri, 1 Nov 2002 16:27:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Balasubramanian",
"Vijay",
""
],
[
"de Boer",
"Jan",
""
],
[
"Minic",
"Djordje",
""
]
] | In this talk we entertain the possibility that the synthesis of general covariance and quantum mechanics requires an extension of the basic kinematical setup of quantum mechanics. According to the holographic principle, regions of spacetime bounded by a finite area carry finite entropy. When we in addition assume that ... |
2004.05178 | Helvi Witek | Gast\'on Creci and Stefan Vandoren and Helvi Witek | Evolution of black hole shadows from superradiance | 22 pages, 16 figures. Updated to match published version | Phys. Rev. D 101, 124051 (2020) | 10.1103/PhysRevD.101.124051 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes have turned into cosmic laboratories to search for ultra-light
scalars by virtue of the superradiant instability. In this paper we present a
detailed study of the impact of the superradiant evolution on the black hole
shadow and investigate the exciting possibility to explore it with future
observations o... | [
{
"created": "Fri, 10 Apr 2020 18:00:12 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Jul 2020 02:19:38 GMT",
"version": "v2"
}
] | 2020-07-03 | [
[
"Creci",
"Gastón",
""
],
[
"Vandoren",
"Stefan",
""
],
[
"Witek",
"Helvi",
""
]
] | Black holes have turned into cosmic laboratories to search for ultra-light scalars by virtue of the superradiant instability. In this paper we present a detailed study of the impact of the superradiant evolution on the black hole shadow and investigate the exciting possibility to explore it with future observations of ... |
1910.05738 | Christian K\"ading | Christian K\"ading | Astro- and Quantum Physical Tests of Screened Scalar Fields | PhD thesis; 140 pages | null | null | null | gr-qc astro-ph.CO hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In general, modified gravity theories are modifications or extensions of
Einstein's general relativity. Some of them give rise to additional scalar
degrees of freedom in Nature. If these scalar fields exist and are light
enough, they should cause a gravity-like fifth force that could, in principle,
exceed gravity in ... | [
{
"created": "Sun, 13 Oct 2019 12:20:49 GMT",
"version": "v1"
}
] | 2019-12-12 | [
[
"Käding",
"Christian",
""
]
] | In general, modified gravity theories are modifications or extensions of Einstein's general relativity. Some of them give rise to additional scalar degrees of freedom in Nature. If these scalar fields exist and are light enough, they should cause a gravity-like fifth force that could, in principle, exceed gravity in it... |
gr-qc/0605126 | Delia Ionescu | Delia Ionescu | Comparative analysis of the electrogravitational Kepler problem in GRT
and RTG | null | International Journal of Non-Linear Mechanics, 38(2003), 1251-1268 | 10.1016/S0020-7462(02)00071-9 | null | gr-qc | null | In the framework of Einstein's General Relativity Theory and of the
Relativistic Theory of Gravitation, the equations governing the trajectories of
charged particles in the field created by a charged mass point are given. An
analysis of the shape of the trajectories in both theories is presented. The
first and the se... | [
{
"created": "Wed, 24 May 2006 10:45:44 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Ionescu",
"Delia",
""
]
] | In the framework of Einstein's General Relativity Theory and of the Relativistic Theory of Gravitation, the equations governing the trajectories of charged particles in the field created by a charged mass point are given. An analysis of the shape of the trajectories in both theories is presented. The first and the seco... |
gr-qc/9211003 | Kay-Thomas Pirk | Kay-Thomas Pirk | Hadamard States and Adiabatic Vacua | 10pages, LaTeX (RevTeX-preprint style) | Phys.Rev. D48 (1993) 3779-3783 | 10.1103/PhysRevD.48.3779 | UMD preprint 92-239 | gr-qc hep-th | null | Reversing a slight detrimental effect of the mailer related to TeXability
| [
{
"created": "Wed, 4 Nov 1992 20:55:28 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Nov 1992 15:43:39 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Pirk",
"Kay-Thomas",
""
]
] | Reversing a slight detrimental effect of the mailer related to TeXability |
gr-qc/9710006 | Kirill Krasnov | Kirill Krasnov (PennState) | Quantum Geometry and Thermal Radiation from Black Holes | 19 pages, 4 figures, modified version to appear in Class. Quant. Grav | Class.Quant.Grav. 16 (1999) 563-578 | 10.1088/0264-9381/16/2/018 | CGPG-97/9-4 | gr-qc hep-th | null | A quantum mechanical description of black hole states proposed recently
within non-perturbative quantum gravity is used to study the emission and
absorption spectra of quantum black holes. We assume that the probability
distribution of states of the quantum black hole is given by the ``area''
canonical ensemble, in w... | [
{
"created": "Wed, 1 Oct 1997 20:43:18 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Feb 1999 06:03:37 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Krasnov",
"Kirill",
"",
"PennState"
]
] | A quantum mechanical description of black hole states proposed recently within non-perturbative quantum gravity is used to study the emission and absorption spectra of quantum black holes. We assume that the probability distribution of states of the quantum black hole is given by the ``area'' canonical ensemble, in whi... |
0903.4610 | Shuang-Yong Zhou | Shuang-Yong Zhou, Edmund J. Copeland, Paul M. Saffin | Cosmological Constraints on $f(G)$ Dark Energy Models | 17 pages, 3 figures; typos corrected | JCAP 0907:009,2009 | 10.1088/1475-7516/2009/07/009 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified gravity theories with the Gauss-Bonnet term
$G=R^2-4R^{\mu\nu}R_{\mu\nu}+R^{\mu\nu\rho\sigma}R_{\mu\nu\rho\sigma}$ have
recently gained a lot of attention as a possible explanation of dark energy. We
perform a thorough phase space analysis on the so-called $f(G)$ models, where
$f(G)$ is some general function... | [
{
"created": "Thu, 26 Mar 2009 19:28:47 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Apr 2009 15:53:42 GMT",
"version": "v2"
},
{
"created": "Thu, 30 Sep 2010 13:09:25 GMT",
"version": "v3"
}
] | 2010-10-01 | [
[
"Zhou",
"Shuang-Yong",
""
],
[
"Copeland",
"Edmund J.",
""
],
[
"Saffin",
"Paul M.",
""
]
] | Modified gravity theories with the Gauss-Bonnet term $G=R^2-4R^{\mu\nu}R_{\mu\nu}+R^{\mu\nu\rho\sigma}R_{\mu\nu\rho\sigma}$ have recently gained a lot of attention as a possible explanation of dark energy. We perform a thorough phase space analysis on the so-called $f(G)$ models, where $f(G)$ is some general function o... |
1404.4307 | Luc Blanchet | Brett Altschul, Quentin G. Bailey, Luc Blanchet, Kai Bongs, Philippe
Bouyer, Luigi Cacciapuoti, Salvatore Capozziello, Naceur Gaaloul, Domenico
Giulini, Jonas Hartwig, Luciano Iess, Philippe Jetzer, Arnaud Landragin,
Ernst Rasel, Serge Reynaud, Stephan Schiller, Christian Schubert, Fiodor
Sorrentino, Uwe Sterr,... | Quantum Tests of the Einstein Equivalence Principle with the STE-QUEST
Space Mission | 27 pages, 6 figures, to appear in Advances in Space Research | Advances in Space Research, 55 (2015) 501-524 | 10.1016/j.asr.2014.07.014 | null | gr-qc astro-ph.CO quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present in detail the scientific objectives in fundamental physics of the
Space-Time Explorer and QUantum Equivalence Space Test (STE-QUEST) space
mission. STE-QUEST was pre-selected by the European Space Agency together with
four other missions for the cosmic vision M3 launch opportunity planned around
2024. It c... | [
{
"created": "Wed, 16 Apr 2014 16:42:31 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Sep 2014 17:11:24 GMT",
"version": "v2"
}
] | 2015-03-19 | [
[
"Altschul",
"Brett",
""
],
[
"Bailey",
"Quentin G.",
""
],
[
"Blanchet",
"Luc",
""
],
[
"Bongs",
"Kai",
""
],
[
"Bouyer",
"Philippe",
""
],
[
"Cacciapuoti",
"Luigi",
""
],
[
"Capozziello",
"Salvatore",
""
... | We present in detail the scientific objectives in fundamental physics of the Space-Time Explorer and QUantum Equivalence Space Test (STE-QUEST) space mission. STE-QUEST was pre-selected by the European Space Agency together with four other missions for the cosmic vision M3 launch opportunity planned around 2024. It car... |
2207.11370 | Fech Scen Khoo | Jose Luis Bl\'azquez-Salcedo, Luis Manuel Gonz\'alez-Romero, Fech Scen
Khoo, Jutta Kunz, Vincent Preut | $\phi$-modes of neutron stars in a massless scalar-tensor theory | 23 pages, 16 figures, Invited contribution to the volume
"Perturbations in Modified Gravitation and Cosmology", to appear in Frontiers
in Astronomy And Space Sciences | Front.Astron.Space Sci. 9 (2022) 1005108 | 10.3389/fspas.2022.1005108 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar-tensor theories allow for a rich spectrum of quasinormal modes of
neutron stars. The presence of the scalar field allows for polar monopole and
dipole radiation, as well as for additional higher multipole modes led by the
scalar field. Here we present these scalar-led $\phi$-modes for the lowest
multipoles, $l... | [
{
"created": "Fri, 22 Jul 2022 22:54:34 GMT",
"version": "v1"
}
] | 2024-05-13 | [
[
"Blázquez-Salcedo",
"Jose Luis",
""
],
[
"González-Romero",
"Luis Manuel",
""
],
[
"Khoo",
"Fech Scen",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Preut",
"Vincent",
""
]
] | Scalar-tensor theories allow for a rich spectrum of quasinormal modes of neutron stars. The presence of the scalar field allows for polar monopole and dipole radiation, as well as for additional higher multipole modes led by the scalar field. Here we present these scalar-led $\phi$-modes for the lowest multipoles, $l=0... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.