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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1701.03657 | Marko Sossich | Petar Pavlovic and Marko Sossich | Cyclic cosmology in modified gravity | 33 pages, 11 figures | Phys. Rev. D 95, 103519 (2017) | 10.1103/PhysRevD.95.103519 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we propose a new general model of eternal cyclic Universe. We
start from the assumption that quantum gravity corrections can be effectively
accounted by the addition of higher order curvature terms in the Lagrangian
density for gravity. It is also taken into account that coefficients associated
with thes... | [
{
"created": "Fri, 13 Jan 2017 13:15:44 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Jan 2017 16:39:16 GMT",
"version": "v2"
},
{
"created": "Sat, 3 Jun 2017 13:14:09 GMT",
"version": "v3"
}
] | 2017-06-06 | [
[
"Pavlovic",
"Petar",
""
],
[
"Sossich",
"Marko",
""
]
] | In this work we propose a new general model of eternal cyclic Universe. We start from the assumption that quantum gravity corrections can be effectively accounted by the addition of higher order curvature terms in the Lagrangian density for gravity. It is also taken into account that coefficients associated with these ... |
gr-qc/0602014 | Mauricio Bellini | Mauricio Bellini (Mar del Plata University & CONICET) | Cosmological expansion governed by a scalar field from a 5D vacuum | version accepted in Phys. Lett. B | Phys.Lett. B637 (2006) 16-20 | 10.1016/j.physletb.2006.04.033 | null | gr-qc astro-ph hep-ph hep-th | null | We consider a single field governed expansion of the universe from a five
dimensional (5D) vacuum state. Under an appropiate change of variables the
universe can be viewed in a effective manner as expanding in 4D with an
effective equation of state which describes different epochs of its evolution.
In the example her... | [
{
"created": "Thu, 2 Feb 2006 22:24:32 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Apr 2006 14:01:29 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Apr 2006 19:42:10 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Bellini",
"Mauricio",
"",
"Mar del Plata University & CONICET"
]
] | We consider a single field governed expansion of the universe from a five dimensional (5D) vacuum state. Under an appropiate change of variables the universe can be viewed in a effective manner as expanding in 4D with an effective equation of state which describes different epochs of its evolution. In the example here ... |
1603.05537 | Diego S\'aez-G\'omez | Alvaro de la Cruz-Dombriz (ACGC, U. of Cape Town), Emilio Elizalde
(ICE-CSIC/IEEC), Sergei D. Odintsov (ICE-CSIC/IEEC and ICREA) and Diego
Saez-Gomez (IA, U. of Lisbon) | Spotting deviations from R^2 inflation | 24 pages, 1 figure, minor changes, version matching published
version, conclusions unchanged. arXiv admin note: text overlap with
arXiv:1411.1636 by other authors | JCAP 05 (2016) 060 | 10.1088/1475-7516/2016/05/060 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the soundness of inflationary scenarios in theories beyond the
Starobinsky model, namely a class of theories described by arbitrary functions
of the Ricci scalar and the K-essence field. We discuss the pathologies
associated with higher-order equations of motion which will be shown to
constrain the stabili... | [
{
"created": "Thu, 17 Mar 2016 15:22:03 GMT",
"version": "v1"
},
{
"created": "Wed, 25 May 2016 16:13:47 GMT",
"version": "v2"
}
] | 2016-06-09 | [
[
"de la Cruz-Dombriz",
"Alvaro",
"",
"ACGC, U. of Cape Town"
],
[
"Elizalde",
"Emilio",
"",
"ICE-CSIC/IEEC"
],
[
"Odintsov",
"Sergei D.",
"",
"ICE-CSIC/IEEC and ICREA"
],
[
"Saez-Gomez",
"Diego",
"",
"IA, U. of Lisbon"
]
] | We discuss the soundness of inflationary scenarios in theories beyond the Starobinsky model, namely a class of theories described by arbitrary functions of the Ricci scalar and the K-essence field. We discuss the pathologies associated with higher-order equations of motion which will be shown to constrain the stability... |
0811.1712 | Abdullah Vercin | \"O. A\c{c}{\i}k, \"U. Ertem, M. \"Onder and A. Ver\c{c}in | Basic Gravitational Currents and Killing-Yano Forms | 11 pages | Gen. Relativ. Gravit., 42, 2543 (2010) | 10.1007/s10714-010-1075-4 | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown that for each Killing-Yano (KY)-form accepted by an
$n$-dimensional (pseudo)Riemannian manifold of arbitrary signature, two basic
gravitational currents can be defined. Conservation of the currents are
explicitly proved by showing co-exactness of the one and co-closedness of the
other. Some general ... | [
{
"created": "Tue, 11 Nov 2008 14:24:49 GMT",
"version": "v1"
}
] | 2016-02-10 | [
[
"Açık",
"Ö.",
""
],
[
"Ertem",
"Ü.",
""
],
[
"Önder",
"M.",
""
],
[
"Verçin",
"A.",
""
]
] | It has been shown that for each Killing-Yano (KY)-form accepted by an $n$-dimensional (pseudo)Riemannian manifold of arbitrary signature, two basic gravitational currents can be defined. Conservation of the currents are explicitly proved by showing co-exactness of the one and co-closedness of the other. Some general ge... |
2302.06401 | Andrea Pierfrancesco Sanna | Mariano Cadoni, Andrea Pierfrancesco Sanna | Nonsingular black holes from conformal symmetries | 6 pages, no figures, some discussions improved, matches the version
accepted for pubblication in CQG | Classical & Quantum Gravity, 40 (2023), no. 14, 145012 | 10.1088/1361-6382/acde3c | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We derive the form of the metric for static, nonsingular black holes with a
de Sitter core, representing a deformation of the Schwarzschild solution, by
assuming that the gravitational sources describe a flow between two conformal
points, at small and great distances. The resulting black-hole metric turns out
to be a... | [
{
"created": "Mon, 13 Feb 2023 14:40:11 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jun 2023 07:26:07 GMT",
"version": "v2"
}
] | 2023-06-30 | [
[
"Cadoni",
"Mariano",
""
],
[
"Sanna",
"Andrea Pierfrancesco",
""
]
] | We derive the form of the metric for static, nonsingular black holes with a de Sitter core, representing a deformation of the Schwarzschild solution, by assuming that the gravitational sources describe a flow between two conformal points, at small and great distances. The resulting black-hole metric turns out to be a p... |
2101.08409 | Qiming Fu | Qi-Ming Fu, Li Zhao, and Yu-Xiao Liu | Weak deflection angle by electrically and magnetically charged black
holes from nonlinear electrodynamics | null | Phys. Rev. D 104, 024033 (2021) | 10.1103/PhysRevD.104.024033 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Nonlinear electrodynamic (NLED) theories are well-motivated for their
extensions to classical electrodynamics in the strong field regime, and have
been extensively investigated in seeking for regular black hole solutions. In
this paper, we focus on two spherically symmetric and static black hole
solutions based on tw... | [
{
"created": "Thu, 21 Jan 2021 02:39:42 GMT",
"version": "v1"
}
] | 2021-07-21 | [
[
"Fu",
"Qi-Ming",
""
],
[
"Zhao",
"Li",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | Nonlinear electrodynamic (NLED) theories are well-motivated for their extensions to classical electrodynamics in the strong field regime, and have been extensively investigated in seeking for regular black hole solutions. In this paper, we focus on two spherically symmetric and static black hole solutions based on two ... |
1406.0152 | Roberto Chan | G. Pinheiro and R. Chan | Radiating Gravitational Collapse with an Initial Inhomogeneous Energy
Density Distribution | 22 pages, 12 figures. This paper has already been published in GRG
(2011). arXiv admin note: substantial text overlap with arXiv:1301.2540 | General Relativity and Gravitation 43, 145 (2011) | 10.1007/s10714-010-1132-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new model is proposed to a collapsing star consisting of an initial
inhomogeneous energy density and anisotropic pressure fluid with shear, radial
heat flow and outgoing radiation. In previous papers one of us has always
assumed an initial star with homogeneous energy density. The aim of this work
is to generalize ... | [
{
"created": "Sun, 1 Jun 2014 09:37:47 GMT",
"version": "v1"
}
] | 2014-06-03 | [
[
"Pinheiro",
"G.",
""
],
[
"Chan",
"R.",
""
]
] | A new model is proposed to a collapsing star consisting of an initial inhomogeneous energy density and anisotropic pressure fluid with shear, radial heat flow and outgoing radiation. In previous papers one of us has always assumed an initial star with homogeneous energy density. The aim of this work is to generalize th... |
2309.15488 | She-Sheng Xue | She-Sheng Xue | Holographic massive plasma state in Friedman Universe: cosmological
fine-tuning and coincidence problems | 27 pages and 7 captioned figures. Final version to appear in JCAP
(2024) | JCAP (2024) | null | null | gr-qc astro-ph.CO astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Massive particle and antiparticle pair production and oscillation on the
horizon form a holographic and massive pair plasma state in the Friedman
Universe. Via this state, the Einstein cosmology term (dark energy) interacts
with matter and radiation and is time-varying $\tilde\Lambda$ in the Universe's
evolution. It ... | [
{
"created": "Wed, 27 Sep 2023 08:35:48 GMT",
"version": "v1"
},
{
"created": "Fri, 17 May 2024 15:17:18 GMT",
"version": "v2"
}
] | 2024-05-21 | [
[
"Xue",
"She-Sheng",
""
]
] | Massive particle and antiparticle pair production and oscillation on the horizon form a holographic and massive pair plasma state in the Friedman Universe. Via this state, the Einstein cosmology term (dark energy) interacts with matter and radiation and is time-varying $\tilde\Lambda$ in the Universe's evolution. It is... |
gr-qc/0103086 | Hiroko Koyama | Hiroko Koyama and Akira Tomimatsu | Asymptotic tails of massive scalar fields in Schwarzschild background | 21 pages, 2 figures, accepted for publication in Phys.Rev.D | Phys.Rev. D64 (2001) 044014 | 10.1103/PhysRevD.64.044014 | DPNU-01-04 | gr-qc | null | We investigate the asymptotic tail behavior of massive scalar fields in
Schwarzschild background. It is shown that the oscillatory tail of the scalar
field has the decay rate of $t^{-5/6}$ at asymptotically late times, and the
oscillation with the period $2\pi/m$ for the field mass $m$ is modulated by the
long-term p... | [
{
"created": "Fri, 23 Mar 2001 07:19:51 GMT",
"version": "v1"
},
{
"created": "Fri, 4 May 2001 06:04:40 GMT",
"version": "v2"
}
] | 2007-10-02 | [
[
"Koyama",
"Hiroko",
""
],
[
"Tomimatsu",
"Akira",
""
]
] | We investigate the asymptotic tail behavior of massive scalar fields in Schwarzschild background. It is shown that the oscillatory tail of the scalar field has the decay rate of $t^{-5/6}$ at asymptotically late times, and the oscillation with the period $2\pi/m$ for the field mass $m$ is modulated by the long-term pha... |
gr-qc/0312115 | John W. Moffat | J. W. Moffat | Cosmological Constant Problem | 8 pages. No figures. Latex file. Talk given at QFEXT03, University of
Oklahoma, Norman, Oklahoma, September 15-19, 2003. To be published in the
proceedings by Rinton Press | null | null | null | gr-qc astro-ph hep-ph hep-th | null | The cosmological constant problem is reviewed and a possible quantum gravity
resolution is proposed. A space satellite E\"otv\"os experiment for zero-point
vacuum energy is proposed to see whether Casimir vacuum energy falls in a
gravitational field at the same rate as ordinary matter.
| [
{
"created": "Sun, 28 Dec 2003 21:18:51 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Moffat",
"J. W.",
""
]
] | The cosmological constant problem is reviewed and a possible quantum gravity resolution is proposed. A space satellite E\"otv\"os experiment for zero-point vacuum energy is proposed to see whether Casimir vacuum energy falls in a gravitational field at the same rate as ordinary matter. |
gr-qc/0607064 | {\O}ystein Rudjord | Oystein Rudjord, Oyvind Gron | The Weyl curvature conjecture and black hole entropy | 10 pages, 2 figures, typesetting revtex4 | Phys.Scripta77:055901,2008 | 10.1088/0031-8949/77/05/055901 | null | gr-qc | null | The universe today, with structure such as stars, galaxies and black holes,
seems to have evolved from a very homogeneous initial state. From this it
appears as if the entropy of the universe is decreasing, in violation of the
second law of thermodynamics. It has been suggested by Roger Penrose
\cite{grossmann:penros... | [
{
"created": "Mon, 17 Jul 2006 14:49:44 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Rudjord",
"Oystein",
""
],
[
"Gron",
"Oyvind",
""
]
] | The universe today, with structure such as stars, galaxies and black holes, seems to have evolved from a very homogeneous initial state. From this it appears as if the entropy of the universe is decreasing, in violation of the second law of thermodynamics. It has been suggested by Roger Penrose \cite{grossmann:penrose:... |
gr-qc/0608036 | Farrukh Fattoyev Jabborovich | B. J. Ahmedov, N. I. Rakhmatov | Concerning Measurement of Gravitomagnetism in Electromagnetic Systems | 12 pages, 1 figure | Found.Phys. 33 (2003) 625-639 | null | null | gr-qc astro-ph | null | Measurement of gravitomagnetic field is of fundamental importance as a test
of general relativity. Here we present a new theoretical project for performing
such a measurement based on detection of the electric field arising from the
interplay between the gravitomagnetic and magnetic fields in the stationary
axial-sym... | [
{
"created": "Mon, 7 Aug 2006 19:21:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ahmedov",
"B. J.",
""
],
[
"Rakhmatov",
"N. I.",
""
]
] | Measurement of gravitomagnetic field is of fundamental importance as a test of general relativity. Here we present a new theoretical project for performing such a measurement based on detection of the electric field arising from the interplay between the gravitomagnetic and magnetic fields in the stationary axial-symme... |
1910.08538 | Grigoris Panotopoulos | Grigoris Panotopoulos and \'Angel Rinc\'on | Quasinormal modes of five-dimensional black holes in non-commutative
geometry | References added, to appear soon in EPJ Plus. Analysis similar to
arXiv:1904.10847, albeit in a different context | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the spectrum of quasinormal frequencies of five-dimensional black
holes obtained in noncommutative geometry. In particular, we study scalar
perturbations of a massive scalar field adopting the 6th order WKB
approximation. We investigate in detail the impact of the mass of the scalar
field, the angular degr... | [
{
"created": "Fri, 18 Oct 2019 01:26:20 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Dec 2019 15:24:51 GMT",
"version": "v2"
}
] | 2019-12-24 | [
[
"Panotopoulos",
"Grigoris",
""
],
[
"Rincón",
"Ángel",
""
]
] | We compute the spectrum of quasinormal frequencies of five-dimensional black holes obtained in noncommutative geometry. In particular, we study scalar perturbations of a massive scalar field adopting the 6th order WKB approximation. We investigate in detail the impact of the mass of the scalar field, the angular degree... |
2207.03508 | Javier Roulet | Javier Roulet, Seth Olsen, Jonathan Mushkin, Tousif Islam, Tejaswi
Venumadhav, Barak Zackay and Matias Zaldarriaga | Removing degeneracy and multimodality in gravitational wave source
parameters | 17 pages, 13 figures, 1 table. Matches version accepted for
publication in Phys. Rev. D | null | 10.1103/PhysRevD.106.123015 | null | gr-qc astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasicircular binary black hole mergers are described by 15 parameters, of
which gravitational wave observations can typically constrain only $\sim 10$
independent combinations to varying degree. In this work, we devise coordinates
that remove correlations, and disentangle well- and poorly-measured quantities.
Additi... | [
{
"created": "Thu, 7 Jul 2022 18:00:15 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Nov 2022 23:16:18 GMT",
"version": "v2"
}
] | 2022-12-28 | [
[
"Roulet",
"Javier",
""
],
[
"Olsen",
"Seth",
""
],
[
"Mushkin",
"Jonathan",
""
],
[
"Islam",
"Tousif",
""
],
[
"Venumadhav",
"Tejaswi",
""
],
[
"Zackay",
"Barak",
""
],
[
"Zaldarriaga",
"Matias",
""
]
] | Quasicircular binary black hole mergers are described by 15 parameters, of which gravitational wave observations can typically constrain only $\sim 10$ independent combinations to varying degree. In this work, we devise coordinates that remove correlations, and disentangle well- and poorly-measured quantities. Addition... |
gr-qc/0407094 | Keye Martin | Keye Martin and Prakash Panangaden | A domain of spacetime intervals in general relativity | 25 pages | Commun.Math.Phys. 267 (2006) 563-586 | 10.1007/s00220-006-0066-5 | null | gr-qc | null | Beginning from only a countable dense set of events and the causality
relation, it is possible to reconstruct a globally hyperbolic spacetime in a
purely order theoretic manner. The ultimate reason for this is that globally
hyperbolic spacetimes belong to a category that is equivalent to a special
category of domains... | [
{
"created": "Mon, 26 Jul 2004 03:12:55 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Martin",
"Keye",
""
],
[
"Panangaden",
"Prakash",
""
]
] | Beginning from only a countable dense set of events and the causality relation, it is possible to reconstruct a globally hyperbolic spacetime in a purely order theoretic manner. The ultimate reason for this is that globally hyperbolic spacetimes belong to a category that is equivalent to a special category of domains c... |
1003.0112 | David Campo | David Campo, Nathaniel Obadia | Why does the Unruh effect rely on Lorentz invariance, while Hawking
radiation does not ? | null | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that without Lorentz invariance, the Unruh effect does not exist. We
use modified dispersion relations and describe in turn: the non-thermal nature
of the vacuum (defined in the preferred frame) restricted to the Rindler wedge,
the loss of the KMS property of the Wigthman function, the transition
amplitudes a... | [
{
"created": "Sat, 27 Feb 2010 16:43:54 GMT",
"version": "v1"
}
] | 2010-03-02 | [
[
"Campo",
"David",
""
],
[
"Obadia",
"Nathaniel",
""
]
] | We show that without Lorentz invariance, the Unruh effect does not exist. We use modified dispersion relations and describe in turn: the non-thermal nature of the vacuum (defined in the preferred frame) restricted to the Rindler wedge, the loss of the KMS property of the Wigthman function, the transition amplitudes and... |
gr-qc/9507023 | Pavel Krtous | Pavel Krtou\v{s} | Particle Interpretations and Green Functions for a Free Scalar Field | 28 pages; LaTeX2e document; it uses amsmath.sty, amsfonts.sty,
amssymb.sty, cite.sty and ifthen.sty packages; There exists a broader version
of this paper with additional review material available from
http://fermi.phys.ualberta.ca/~krtous/Physics/pigf/pigf.html or by e-mail
from the Author | null | null | null | gr-qc | null | The formalism of Ashtekar and Magnon \cite{AshtekarMagnon:1975} for the
definition of particles in quantum field theory in curved spacetime is further
developed. The relation between basic objects of this formalism (e.g., the
complex structure) and different Green functions is found. It allows one to
derive compositi... | [
{
"created": "Tue, 11 Jul 1995 23:48:04 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Nov 1995 17:20:08 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Krtouš",
"Pavel",
""
]
] | The formalism of Ashtekar and Magnon \cite{AshtekarMagnon:1975} for the definition of particles in quantum field theory in curved spacetime is further developed. The relation between basic objects of this formalism (e.g., the complex structure) and different Green functions is found. It allows one to derive composition... |
1807.06959 | Tim Dietrich | Tim Dietrich and Serguei Ossokine and Katy Clough | Full 3D Numerical Relativity Simulations of Neutron Star -- Boson Star
Collisions with BAM | null | null | 10.1088/1361-6382/aaf43e | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the first direct detections of gravitational waves (GWs) from the
coalescence of compact binaries observed by the advanced LIGO and VIRGO
interferometers, the era of GW astronomy has begun. Whilst there is strong
evidence that the observed GWs are connected to the merger of two black holes
(BH) or two neutron st... | [
{
"created": "Wed, 18 Jul 2018 14:22:20 GMT",
"version": "v1"
}
] | 2019-01-09 | [
[
"Dietrich",
"Tim",
""
],
[
"Ossokine",
"Serguei",
""
],
[
"Clough",
"Katy",
""
]
] | With the first direct detections of gravitational waves (GWs) from the coalescence of compact binaries observed by the advanced LIGO and VIRGO interferometers, the era of GW astronomy has begun. Whilst there is strong evidence that the observed GWs are connected to the merger of two black holes (BH) or two neutron star... |
2405.11395 | Kamel Ourabah | Kamel Ourabah | Jeans analysis in fractional gravity | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | It has recently been demonstrated [A. Giusti, Phys. Rev. D 101, 124029
(2020)] that characteristic traits of Milgrom's modified Newtonian dynamics
(MOND) can be replicated from an entirely distinct framework: a fractional
variant of Newtonian mechanics. To further assess its validity, this proposal
needs to be tested... | [
{
"created": "Sat, 18 May 2024 21:23:23 GMT",
"version": "v1"
}
] | 2024-05-21 | [
[
"Ourabah",
"Kamel",
""
]
] | It has recently been demonstrated [A. Giusti, Phys. Rev. D 101, 124029 (2020)] that characteristic traits of Milgrom's modified Newtonian dynamics (MOND) can be replicated from an entirely distinct framework: a fractional variant of Newtonian mechanics. To further assess its validity, this proposal needs to be tested i... |
2304.00183 | Reggie Pantig | Gaetano Lambiase, Reggie C. Pantig, Dhruba Jyoti Gogoi, Ali \"Ovg\"un | Investigating the Connection between Generalized Uncertainty Principle
and Asymptotically Safe Gravity in Black Hole Signatures through Shadow and
Quasinormal Modes | 19 pages, 8 figures | Eur. Phys. J. C (2023) 83:679 | 10.1140/epjc/s10052-023-11848-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The links between the deformation parameter $\beta$ of the generalized
uncertainty principle (GUP) to the two free parameters $\hat{\omega}$ and
$\gamma$ of the running Newtonian coupling constant of the Asymptotic Safe
gravity (ASG) program, has been conducted recently in [Phys.Rev.D 105 (2022)
12, 124054]. In this ... | [
{
"created": "Sat, 1 Apr 2023 00:18:35 GMT",
"version": "v1"
}
] | 2023-09-12 | [
[
"Lambiase",
"Gaetano",
""
],
[
"Pantig",
"Reggie C.",
""
],
[
"Gogoi",
"Dhruba Jyoti",
""
],
[
"Övgün",
"Ali",
""
]
] | The links between the deformation parameter $\beta$ of the generalized uncertainty principle (GUP) to the two free parameters $\hat{\omega}$ and $\gamma$ of the running Newtonian coupling constant of the Asymptotic Safe gravity (ASG) program, has been conducted recently in [Phys.Rev.D 105 (2022) 12, 124054]. In this pa... |
1208.5266 | Mauricio Bellini | Luz Marina Reyes, Claudia Moreno, Jos\'e Edgar Madriz Aguilar
(Departamento de Matem\'aticas, CUCEI, Universidad de Guadalajara), Mauricio
Bellini (IFIMAR, Universidad Nacional de Mar del Plata and CONICET) | Gravitational waves during inflation from a 5D large-scale repulsive
gravity model | Improved version, accepted in Physics Letters B | null | 10.1016/j.physletb.2012.09.024 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate, in the transverse traceless (TT) gauge, the generation of the
relic background of gravitational waves, generated during an early inflationary
stage, on the framework of a large-scale repulsive gravity model. We calculate
the spectrum of the tensor metric fluctuations of an effective 4D
Schwarzschild-d... | [
{
"created": "Sun, 26 Aug 2012 23:33:42 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Sep 2012 16:41:17 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Reyes",
"Luz Marina",
"",
"Departamento de Matemáticas, CUCEI, Universidad de Guadalajara"
],
[
"Moreno",
"Claudia",
"",
"Departamento de Matemáticas, CUCEI, Universidad de Guadalajara"
],
[
"Aguilar",
"José Edgar Madriz",
"",
"Departamento de Matemáticas, ... | We investigate, in the transverse traceless (TT) gauge, the generation of the relic background of gravitational waves, generated during an early inflationary stage, on the framework of a large-scale repulsive gravity model. We calculate the spectrum of the tensor metric fluctuations of an effective 4D Schwarzschild-de-... |
1412.5482 | Yu Zhang | En-Kun Li, Yu Zhang, and Jin-Ling Geng | Modified holographic Ricci dark energy coupled to interacting
relativistic and non-relativistic dark matter in the nonflat universe | 14 pages, 8 figures | Phys. Rev. D 90, 083534 (2014) | 10.1103/PhysRevD.90.083534 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The modified holographic Ricci dark energy coupled to interacting
relativistic and non-relativistic dark matter is considered in the nonflat
Friedmann-Robertson-Walker universe. Through examining the deceleration
parameter, one can find that the transition time of the Universe from
decelerating to accelerating phase ... | [
{
"created": "Tue, 16 Dec 2014 13:45:48 GMT",
"version": "v1"
}
] | 2014-12-18 | [
[
"Li",
"En-Kun",
""
],
[
"Zhang",
"Yu",
""
],
[
"Geng",
"Jin-Ling",
""
]
] | The modified holographic Ricci dark energy coupled to interacting relativistic and non-relativistic dark matter is considered in the nonflat Friedmann-Robertson-Walker universe. Through examining the deceleration parameter, one can find that the transition time of the Universe from decelerating to accelerating phase in... |
2110.01879 | Koustav Chandra | Koustav Chandra, Archana Pai, V. Villa-Ortega, T. Dent, C. McIsaac, I.
W. Harry, G. S. Cabourn Davies and K. Soni | Salient features of the optimised PyCBC IMBH search | 9 pages, Conference proceedings of Sixteenth Marcel Grossmann Meeting
- MG16 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Matched-filter based PyCBC searches have successfully detected $\sim
\mathcal{O}(50)$ compact binary merger signals in the LIGO-Virgo data. While
most PyCBC searches have been designed to detect stellar-mass binaries, we
present here a new search that is optimised to detect short-duration \ac{GW}
signals emitted by i... | [
{
"created": "Tue, 5 Oct 2021 08:47:21 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Oct 2021 05:19:24 GMT",
"version": "v2"
}
] | 2021-10-07 | [
[
"Chandra",
"Koustav",
""
],
[
"Pai",
"Archana",
""
],
[
"Villa-Ortega",
"V.",
""
],
[
"Dent",
"T.",
""
],
[
"McIsaac",
"C.",
""
],
[
"Harry",
"I. W.",
""
],
[
"Davies",
"G. S. Cabourn",
""
],
[
"Son... | Matched-filter based PyCBC searches have successfully detected $\sim \mathcal{O}(50)$ compact binary merger signals in the LIGO-Virgo data. While most PyCBC searches have been designed to detect stellar-mass binaries, we present here a new search that is optimised to detect short-duration \ac{GW} signals emitted by int... |
1510.08828 | Simone Speziale | Tommaso De Lorenzo, Andrea Giusti, Simone Speziale | Non-singular rotating black hole with a time delay in the center | 15 pages, many figures; v2: updated references | General Relativity and Gravitation 48 (March 2016) | 10.1007/s10714-016-2026-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As proposed by Bambi and Modesto, rotating non-singular black holes can be
constructed via the Newman-Janis algorithm. Here we show that if one starts
with a modified Hayward black hole with a time delay in the centre, the
algorithm succeeds in producing a rotating metric, but curvature divergences
reappear. To prese... | [
{
"created": "Thu, 29 Oct 2015 19:23:38 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Feb 2016 09:07:36 GMT",
"version": "v2"
}
] | 2017-09-06 | [
[
"De Lorenzo",
"Tommaso",
""
],
[
"Giusti",
"Andrea",
""
],
[
"Speziale",
"Simone",
""
]
] | As proposed by Bambi and Modesto, rotating non-singular black holes can be constructed via the Newman-Janis algorithm. Here we show that if one starts with a modified Hayward black hole with a time delay in the centre, the algorithm succeeds in producing a rotating metric, but curvature divergences reappear. To preserv... |
1401.0714 | Sharmanthie Fernando | Sharmanthie Fernando | Cold, ultracold and Nariai black holes with quintessence | 22 pages and 18 figures | General Relativity and Gravitation (45) 2053 (2013) | 10.1007/s10714-013-1578-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the properties of the charged black hole surrounded
by the quintessence. The solution space for the horizons for various values of
the mass $M$, charge $Q$, and the quintessence parameter $\alpha$ are studied
in detail. Special focus in given to the degenerate horizons: we obtain cold,
ultraco... | [
{
"created": "Fri, 3 Jan 2014 20:46:46 GMT",
"version": "v1"
}
] | 2015-06-18 | [
[
"Fernando",
"Sharmanthie",
""
]
] | In this paper, we study the properties of the charged black hole surrounded by the quintessence. The solution space for the horizons for various values of the mass $M$, charge $Q$, and the quintessence parameter $\alpha$ are studied in detail. Special focus in given to the degenerate horizons: we obtain cold, ultracold... |
1204.3455 | Hubert F M Goenner | Hubert Goenner | Some remarks on the genesis of scalar-tensor theories | 24 pages | null | 10.1007/s10714-012-1378-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Between 1941 and 1962, scalar-tensor theories of gravitation were suggested
four times by different scientists in four different countries. The earliest
originator, the Swiss mathematician W. Scherrer, was virtually unknown until
now whereas the chronologically latest pair gave their names to a multitude of
publicati... | [
{
"created": "Mon, 16 Apr 2012 11:47:19 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Goenner",
"Hubert",
""
]
] | Between 1941 and 1962, scalar-tensor theories of gravitation were suggested four times by different scientists in four different countries. The earliest originator, the Swiss mathematician W. Scherrer, was virtually unknown until now whereas the chronologically latest pair gave their names to a multitude of publication... |
gr-qc/0507003 | Bahtiyar Ozgur Sarioglu | Serkay Olmez, Ozgur Sarioglu, Bayram Tekin | Mass and angular momentum of asymptotically AdS or flat solutions in the
topologically massive gravity | REVTEX4, 8 pages, no figures, added 2 references and a few clarifying
remarks | Class.Quant.Grav. 22 (2005) 4355-4362 | 10.1088/0264-9381/22/20/014 | null | gr-qc hep-th | null | We study the conserved charges of supersymmetric solutions in the
topologically massive gravity theory for both asymptotically flat and constant
curvature geometries.
| [
{
"created": "Fri, 1 Jul 2005 12:06:53 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Jul 2005 07:24:49 GMT",
"version": "v2"
},
{
"created": "Fri, 2 Sep 2005 14:19:37 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Olmez",
"Serkay",
""
],
[
"Sarioglu",
"Ozgur",
""
],
[
"Tekin",
"Bayram",
""
]
] | We study the conserved charges of supersymmetric solutions in the topologically massive gravity theory for both asymptotically flat and constant curvature geometries. |
gr-qc/9507036 | Hideo Kodama | Hideo Kodama | Dynamics of Totally Constrained Systems I. Classical Theory | 31 pages, LaTeX file | Prog.Theor.Phys. 94 (1995) 475-502 | 10.1143/PTP.94.475 | YITP/U-95-18 | gr-qc | null | This is the first of a series of papers in which a new formulation of quantum
theory is developed for totally constrained systems, that is, canonical systems
in which the hamiltonian is written as a linear combination of constraints
$h_\alpha$ with arbitrary coefficients. The main purpose of the present paper
is to m... | [
{
"created": "Mon, 17 Jul 1995 11:05:27 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Kodama",
"Hideo",
""
]
] | This is the first of a series of papers in which a new formulation of quantum theory is developed for totally constrained systems, that is, canonical systems in which the hamiltonian is written as a linear combination of constraints $h_\alpha$ with arbitrary coefficients. The main purpose of the present paper is to mak... |
1706.01244 | Kimet Jusufi | Kimet Jusufi | Deflection Angle of Light by Wormholes using the Gauss-Bonnet Theorem | Accepted for publication in International Journal of Geometric
Methods in Modern Physics | Int. J. Geom. Methods Mod. Phys. Vol. 14 (2017) 1750179 | 10.1142/S0219887817501791 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter, we have investigated the deflection angle of light by
wormholes using a new geometrical method known as Gibbons-Werner method (GW).
In particular we have calculated the deflection angle of light in the weak
limit approximation in two wormhole spacetime geometries: Ellis wormhole and
Janis-Newman-Winni... | [
{
"created": "Mon, 5 Jun 2017 09:08:41 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Aug 2017 15:45:41 GMT",
"version": "v2"
}
] | 2017-08-22 | [
[
"Jusufi",
"Kimet",
""
]
] | In this letter, we have investigated the deflection angle of light by wormholes using a new geometrical method known as Gibbons-Werner method (GW). In particular we have calculated the deflection angle of light in the weak limit approximation in two wormhole spacetime geometries: Ellis wormhole and Janis-Newman-Winnico... |
0911.4583 | Brett McInnes | Brett McInnes | Decoupling Inflation From the String Scale | 24 pages, 5 eps figures, references added, stylistic changes, version
to appear in Classical and Quantum Gravity | Class.Quant.Grav.27:165001,2010 | 10.1088/0264-9381/27/16/165001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When Inflation is embedded in a fundamental theory, such as string theory, it
typically begins when the Universe is already substantially larger than the
fundamental scale [such as the one defined by the string length scale]. This is
naturally explained by postulating a pre-inflationary era, during which the
size of ... | [
{
"created": "Tue, 24 Nov 2009 09:39:51 GMT",
"version": "v1"
},
{
"created": "Wed, 26 May 2010 04:27:07 GMT",
"version": "v2"
}
] | 2010-09-03 | [
[
"McInnes",
"Brett",
""
]
] | When Inflation is embedded in a fundamental theory, such as string theory, it typically begins when the Universe is already substantially larger than the fundamental scale [such as the one defined by the string length scale]. This is naturally explained by postulating a pre-inflationary era, during which the size of th... |
1703.10391 | Mercedes Martin-Benito | Beatriz Elizaga Navascu\'es, Mercedes Mart\'in-Benito and Guillermo A.
Mena Marug\'an | Fermions in Hybrid Loop Quantum Cosmology | 29 pages. It matches published version | Phys. Rev. D 96, 044023 (2017) | 10.1103/PhysRevD.96.044023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work pioneers the quantization of primordial fermion perturbations in
hybrid Loop Quantum Cosmology (LQC). We consider a Dirac field coupled to a
spatially flat, homogeneous, and isotropic cosmology, sourced by a scalar
inflaton, and treat the Dirac field as a perturbation. We describe the
inhomogeneities of thi... | [
{
"created": "Thu, 30 Mar 2017 10:31:21 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Sep 2017 11:44:01 GMT",
"version": "v2"
}
] | 2017-09-08 | [
[
"Navascués",
"Beatriz Elizaga",
""
],
[
"Martín-Benito",
"Mercedes",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
]
] | This work pioneers the quantization of primordial fermion perturbations in hybrid Loop Quantum Cosmology (LQC). We consider a Dirac field coupled to a spatially flat, homogeneous, and isotropic cosmology, sourced by a scalar inflaton, and treat the Dirac field as a perturbation. We describe the inhomogeneities of this ... |
1911.04723 | Guang-Zhen Kang | Guang-Zhen Kang, De-Sheng Zhang, Long Du, Dan Shan and Hong-Shi Zong | Cosmic Acceleration Caused by the Extra-Dimensional Evolution in a
Generalized Randall-Sundrum Model | 7 pages, 3 figures | null | 10.1088/1674-1137/abadec | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a $(n+1)$-dimensional generalized Randall-Sundrum model with
an anisotropic metric which has three different scale factors. One obtain a
positive effective cosmological constant $\Omega_{eff}\sim10^{-124}$ (in Planck
unit) which only need a solution $kr\simeq50-80$ without fine tuning, and both
the vis... | [
{
"created": "Tue, 12 Nov 2019 07:58:31 GMT",
"version": "v1"
}
] | 2020-12-02 | [
[
"Kang",
"Guang-Zhen",
""
],
[
"Zhang",
"De-Sheng",
""
],
[
"Du",
"Long",
""
],
[
"Shan",
"Dan",
""
],
[
"Zong",
"Hong-Shi",
""
]
] | We investigate a $(n+1)$-dimensional generalized Randall-Sundrum model with an anisotropic metric which has three different scale factors. One obtain a positive effective cosmological constant $\Omega_{eff}\sim10^{-124}$ (in Planck unit) which only need a solution $kr\simeq50-80$ without fine tuning, and both the visib... |
1710.03827 | Gil de Oliveira-Neto | G. Oliveira-Neto, L. G. Martins, G. A. Monerat and E. V. Corr\^ea
Silva | DeBroglie-Bohm interpretation of a Ho\v{r}ava-Lifshitz quantum cosmology
model | 12 pages and 2 figures | Mod. Phys. Lett. A, Vol. 33, No. 2 (2018) 1850014 | 10.1142/S0217732318500141 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present letter, we consider the DeBroglie-Bohm interpretation of a
Ho\v{r}ava-Lifshitz quantum cosmology model in the presence of a radiation
perfect fluid. We compute the Bohm's trajectories for the scale factor and show
that it never goes to zero. That result gives a strong indication that this
model is free... | [
{
"created": "Tue, 10 Oct 2017 21:23:07 GMT",
"version": "v1"
}
] | 2018-01-17 | [
[
"Oliveira-Neto",
"G.",
""
],
[
"Martins",
"L. G.",
""
],
[
"Monerat",
"G. A.",
""
],
[
"Silva",
"E. V. Corrêa",
""
]
] | In the present letter, we consider the DeBroglie-Bohm interpretation of a Ho\v{r}ava-Lifshitz quantum cosmology model in the presence of a radiation perfect fluid. We compute the Bohm's trajectories for the scale factor and show that it never goes to zero. That result gives a strong indication that this model is free f... |
gr-qc/0512030 | Joan Sola | Joan Sola | Cosmology with running parameters | Talk given at TAUP 2005, Zaragoza, Spain, 10-14 Sep 2005 | J.Phys.Conf.Ser. 39 (2006) 179 | 10.1088/1742-6596/39/1/044 | null | gr-qc astro-ph hep-ph hep-th | null | The experimental evidence that the equation of state (EOS) of the dark energy
(DE) could be evolving with time/redshift (including the possibility that it
might behave phantom-like near our time) suggests that there might be dynamical
DE fields that could explain this behavior. We propose, instead, that a
variable co... | [
{
"created": "Mon, 5 Dec 2005 20:32:56 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Sola",
"Joan",
""
]
] | The experimental evidence that the equation of state (EOS) of the dark energy (DE) could be evolving with time/redshift (including the possibility that it might behave phantom-like near our time) suggests that there might be dynamical DE fields that could explain this behavior. We propose, instead, that a variable cosm... |
2012.11536 | Daniele Oriti | Marco Finocchiaro, Yoobin Jeong, Daniele Oriti | Quantum geometric maps and their properties | 26 pages | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum geometric maps, which relate SU(2) spin networks and Lorentz
covariant projected spin networks, are an important ingredient of spin foam
models (and tensorial group field theories) for 4-dimensional quantum gravity.
We give a general definition of such maps, that encompasses all current spin
foam models, and ... | [
{
"created": "Mon, 21 Dec 2020 17:56:33 GMT",
"version": "v1"
}
] | 2020-12-22 | [
[
"Finocchiaro",
"Marco",
""
],
[
"Jeong",
"Yoobin",
""
],
[
"Oriti",
"Daniele",
""
]
] | Quantum geometric maps, which relate SU(2) spin networks and Lorentz covariant projected spin networks, are an important ingredient of spin foam models (and tensorial group field theories) for 4-dimensional quantum gravity. We give a general definition of such maps, that encompasses all current spin foam models, and we... |
gr-qc/9410023 | Ted Jacobson | Ted Jacobson and Shankar Venkataramani | Topology of Event Horizons and Topological Censorship | 11 pages, plain latex (minor revision: $\Sigma$ replaced by its
closure in various places.) | Class.Quant.Grav.12:1055-1062,1995 | 10.1088/0264-9381/12/4/012 | UMDGR-95-019 | gr-qc hep-th | null | We prove that, under certain conditions, the topology of the event horizon of
a four dimensional asymptotically flat black hole spacetime must be a 2-sphere.
No stationarity assumption is made. However, in order for the theorem to apply,
the horizon topology must be unchanging for long enough to admit a certain kind
... | [
{
"created": "Tue, 18 Oct 1994 04:26:56 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Oct 1994 20:23:53 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Jacobson",
"Ted",
""
],
[
"Venkataramani",
"Shankar",
""
]
] | We prove that, under certain conditions, the topology of the event horizon of a four dimensional asymptotically flat black hole spacetime must be a 2-sphere. No stationarity assumption is made. However, in order for the theorem to apply, the horizon topology must be unchanging for long enough to admit a certain kind of... |
1310.6858 | Giovanni Acquaviva | Giovanni Acquaviva | Tunnelling methods and Unruh-DeWitt detectors in curved spacetimes | Contribution for the Proceedings of the Karl Schwarzschild Meeting
2013 (Frankfurt, July 22-26 2013) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this contribution we describe some interesting interplay between quantum
theory, general relativity and thermodynamics. In order to highlight the
connection between these theories, we describe two approaches that allow to
calculate thermal features as perceived by different observers in curved
spacetimes: the tunn... | [
{
"created": "Fri, 25 Oct 2013 09:23:43 GMT",
"version": "v1"
}
] | 2013-10-28 | [
[
"Acquaviva",
"Giovanni",
""
]
] | In this contribution we describe some interesting interplay between quantum theory, general relativity and thermodynamics. In order to highlight the connection between these theories, we describe two approaches that allow to calculate thermal features as perceived by different observers in curved spacetimes: the tunnel... |
1408.4945 | Andrea Geralico | Donato Bini, Andrea Geralico, Robert T. Jantzen, Oldrich Semer\'ak,
Luigi Stella | The general relativistic Poynting-Robertson effect. II: A photon flux
with nonzero angular momentum | 22 pages, 4 figures; published version | Class. Quantum Grav. 28, 035008 (2011) | 10.1088/0264-9381/28/3/035008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the motion of a test particle in a stationary, axially and
reflection symmetric spacetime of a central compact object, as affected by
interaction with a test radiation field of the same symmetries. Considering the
radiation flux with fixed but arbitrary (non-zero) angular momentum, we extend
previous results... | [
{
"created": "Thu, 21 Aug 2014 10:44:51 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Jantzen",
"Robert T.",
""
],
[
"Semerák",
"Oldrich",
""
],
[
"Stella",
"Luigi",
""
]
] | We study the motion of a test particle in a stationary, axially and reflection symmetric spacetime of a central compact object, as affected by interaction with a test radiation field of the same symmetries. Considering the radiation flux with fixed but arbitrary (non-zero) angular momentum, we extend previous results l... |
gr-qc/0502067 | Mark Hannam | Mark D. Hannam, Gregory B. Cook | Conformal thin-sandwich puncture initial data for boosted black holes | 12 pages, 11 figures | Phys.Rev. D71 (2005) 084023 | 10.1103/PhysRevD.71.084023 | null | gr-qc | null | We apply the puncture approach to conformal thin-sandwich black-hole initial
data. We solve numerically the conformal thin-sandwich puncture (CTSP)
equations for a single black hole with non-zero linear momentum. We show that
conformally flat solutions for a boosted black hole have the same maximum
gravitational radi... | [
{
"created": "Mon, 14 Feb 2005 18:38:31 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Feb 2005 22:11:57 GMT",
"version": "v2"
},
{
"created": "Mon, 23 May 2005 20:11:19 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Hannam",
"Mark D.",
""
],
[
"Cook",
"Gregory B.",
""
]
] | We apply the puncture approach to conformal thin-sandwich black-hole initial data. We solve numerically the conformal thin-sandwich puncture (CTSP) equations for a single black hole with non-zero linear momentum. We show that conformally flat solutions for a boosted black hole have the same maximum gravitational radiat... |
2302.05413 | Antonio Enea Romano | Antonio Enea Romano, Mairi Sakellariadou | The mirage of luminal modified gravitational-wave propagation | Version accepted in Phys. Rev. Lett | Phys. Rev. Lett. 130, 231401, 2023 | 10.1103/PhysRevLett.130.231401 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | Using conformal invariance of gravitational waves, we show that for a luminal
modified gravity theory, the gravitational-wave propagation and luminosity
distance are the same as in general relativity. The relation between the
gravitational-wave and electromagnetic-wave luminosity distance gets however
modified for el... | [
{
"created": "Fri, 10 Feb 2023 18:29:06 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Feb 2023 17:15:18 GMT",
"version": "v2"
},
{
"created": "Sat, 10 Jun 2023 15:22:33 GMT",
"version": "v3"
}
] | 2023-12-08 | [
[
"Romano",
"Antonio Enea",
""
],
[
"Sakellariadou",
"Mairi",
""
]
] | Using conformal invariance of gravitational waves, we show that for a luminal modified gravity theory, the gravitational-wave propagation and luminosity distance are the same as in general relativity. The relation between the gravitational-wave and electromagnetic-wave luminosity distance gets however modified for elec... |
1610.02636 | Zhong-Ying Fan | Zhong-Ying Fan and Xiaobao Wang | Construction of Regular Black Holes in General Relativity | 18 pages,1 figure;minor corrections, references added,published
version | Phys. Rev. D 94, 124027 (2016) | 10.1103/PhysRevD.94.124027 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a general procedure for constructing exact black hole solutions
with electric or magnetic charges in General Relativity coupled to a nonlinear
electrodynamics. We obtain a variety of two-parameter family spherically
symmetric black hole solutions. In particular, the singularity at the central
of the space-... | [
{
"created": "Sun, 9 Oct 2016 07:15:39 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Oct 2016 02:27:37 GMT",
"version": "v2"
},
{
"created": "Sun, 25 Dec 2016 15:12:24 GMT",
"version": "v3"
}
] | 2016-12-28 | [
[
"Fan",
"Zhong-Ying",
""
],
[
"Wang",
"Xiaobao",
""
]
] | We present a general procedure for constructing exact black hole solutions with electric or magnetic charges in General Relativity coupled to a nonlinear electrodynamics. We obtain a variety of two-parameter family spherically symmetric black hole solutions. In particular, the singularity at the central of the space-ti... |
0706.2621 | George Bogoslovsky | George Bogoslovsky | Some physical displays of the space anisotropy relevant to the
feasibility of its being detected at a laboratory | 11 pages, to appear in Proc. Int. Conf. "Physical Interpretations of
Relativity Theory" | null | null | null | gr-qc | null | The impact of local space anisotropy on the transverse Doppler effect is
examined. Two types of laboratory experiments aimed at seeking and measuring
the local space anisotropy are proposed. In terms of the conventional special
relativity theory, which treats 3D space to be locally isotropic, the
experiments are of t... | [
{
"created": "Mon, 18 Jun 2007 15:21:13 GMT",
"version": "v1"
}
] | 2007-06-19 | [
[
"Bogoslovsky",
"George",
""
]
] | The impact of local space anisotropy on the transverse Doppler effect is examined. Two types of laboratory experiments aimed at seeking and measuring the local space anisotropy are proposed. In terms of the conventional special relativity theory, which treats 3D space to be locally isotropic, the experiments are of the... |
1810.08550 | Daniel Litim | Kevin G. Falls, Daniel F. Litim, Jan Schr\"oder | Aspects of asymptotic safety for quantum gravity | 29 pages, 7 figures, v2: explanations added, to appear with PRD | Phys. Rev. D 99, 126015 (2019) | 10.1103/PhysRevD.99.126015 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study fixed points of quantum gravity with renormalisation group methods,
and a procedure to remove convergence-limiting poles from the flow. The setup
is tested within the $f(R)$ approximation for gravity by solving exact
recursive relations up to order $R^{70}$ in the Ricci scalar, combined with
resummations and... | [
{
"created": "Fri, 19 Oct 2018 15:28:29 GMT",
"version": "v1"
},
{
"created": "Wed, 29 May 2019 17:13:54 GMT",
"version": "v2"
}
] | 2019-07-03 | [
[
"Falls",
"Kevin G.",
""
],
[
"Litim",
"Daniel F.",
""
],
[
"Schröder",
"Jan",
""
]
] | We study fixed points of quantum gravity with renormalisation group methods, and a procedure to remove convergence-limiting poles from the flow. The setup is tested within the $f(R)$ approximation for gravity by solving exact recursive relations up to order $R^{70}$ in the Ricci scalar, combined with resummations and n... |
gr-qc/0502044 | Sergey Cherkas L. | S.L. Cherkas and V.L. Kalashnikov | Quantum evolution of the Universe from $\tau=0$ in the constrained
quasi-Heisenberg picture | Lecture at the VIIIth International School-seminar "The Actual
Problems of Microworld Physics", Gomel, Belarus, July 25-August 5, 2005. 20
pages | Proc. VIIIth International School-seminar "The Actual Problems of
Microworld Physics" (Gomel), Dubna 2007, v. I, p. 208-222. | null | null | gr-qc | null | The Heisenberg picture of the minisuperspace model is considered. The
suggested quantization scheme interprets all the observables including the
Universe scale factor as the (quasi)Heisenberg operators. The operators arise
as a result of the re-quantization of the Heisenberg operators that is required
to obtain the h... | [
{
"created": "Thu, 10 Feb 2005 14:47:29 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Feb 2005 07:23:55 GMT",
"version": "v2"
},
{
"created": "Mon, 19 Sep 2005 15:16:16 GMT",
"version": "v3"
},
{
"created": "Tue, 20 Sep 2005 09:55:46 GMT",
"version": "v4"
},
{
"c... | 2011-11-09 | [
[
"Cherkas",
"S. L.",
""
],
[
"Kalashnikov",
"V. L.",
""
]
] | The Heisenberg picture of the minisuperspace model is considered. The suggested quantization scheme interprets all the observables including the Universe scale factor as the (quasi)Heisenberg operators. The operators arise as a result of the re-quantization of the Heisenberg operators that is required to obtain the her... |
gr-qc/9604053 | Vladimir M. Khatsymovsky | V.M.Khatsymovsky | Ashtekar Constraint Surface as Projection of Hilbert-Palatini One | 9 pages of LaTeX file | Phys.Lett. B394 (1997) 57-61 | 10.1016/S0370-2693(96)01691-7 | null | gr-qc | null | The Hilbert-Palatini (HP) Lagrangian of general relativity being written in
terms of selfdual and antiselfdual variables contains Ashtekar Lagrangian
(which governs the dynamics of the selfdual sector of the theory on condition
that the dynamics of antiselfdual sector is not fixed). We show that
nonequivalence of the... | [
{
"created": "Mon, 29 Apr 1996 10:46:38 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Khatsymovsky",
"V. M.",
""
]
] | The Hilbert-Palatini (HP) Lagrangian of general relativity being written in terms of selfdual and antiselfdual variables contains Ashtekar Lagrangian (which governs the dynamics of the selfdual sector of the theory on condition that the dynamics of antiselfdual sector is not fixed). We show that nonequivalence of the A... |
1910.00428 | Mehrab Momennia | Mehrab Momennia, Seyed Hossein Hendi | Quasinormal modes of black holes in Weyl gravity: Electromagnetic and
gravitational perturbations | 15 pages with 3 captioned figures. Published version | Eur. Phys. J. C 80 (2020) 505 | 10.1140/epjc/s10052-020-8051-2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent reported gravitational wave detection motivates one to investigate
the properties of different black hole models, especially their behavior under
(axial) gravitational perturbation. Here, we study the quasinormal modes of
black holes in Weyl gravity. We derive the master equation describing the
quasinormal... | [
{
"created": "Mon, 30 Sep 2019 06:45:55 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Jul 2020 12:11:40 GMT",
"version": "v2"
}
] | 2022-08-09 | [
[
"Momennia",
"Mehrab",
""
],
[
"Hendi",
"Seyed Hossein",
""
]
] | The recent reported gravitational wave detection motivates one to investigate the properties of different black hole models, especially their behavior under (axial) gravitational perturbation. Here, we study the quasinormal modes of black holes in Weyl gravity. We derive the master equation describing the quasinormal r... |
2404.12223 | Songbai Chen | Zelin Zhang, Songbai Chen, Jiliang Jing | Images of Kerr-MOG black holes surrounded by geometrically thick
magnetized equilibrium tori | 13 pages,7 figures | null | null | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We adopt general relativistic ray-tracing (GRRT) schemes to study images of
Kerr-MOG black holes surrounded by geometrically thick magnetized equilibrium
tori, which belong to steady-state solutions of thick accretion disks within
the framework of general relativistic magnetohydrodynamics (GRMHD). The black
hole poss... | [
{
"created": "Thu, 18 Apr 2024 14:38:05 GMT",
"version": "v1"
}
] | 2024-04-19 | [
[
"Zhang",
"Zelin",
""
],
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | We adopt general relativistic ray-tracing (GRRT) schemes to study images of Kerr-MOG black holes surrounded by geometrically thick magnetized equilibrium tori, which belong to steady-state solutions of thick accretion disks within the framework of general relativistic magnetohydrodynamics (GRMHD). The black hole posses... |
2110.10002 | Diego Rubiera-Garcia | Gonzalo J. Olmo, Diego Rubiera-Garcia, Diego S\'aez-Chill\'on G\'omez | New light rings from multiple critical curves as observational
signatures of black hole mimickers | 6 pages, 5 figures | null | 10.1016/j.physletb.2022.137045 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We argue that the appearance of additional light rings in a shadow
observation - beyond the infinite sequence of exponentially demagnified
self-similar rings foreseen in the Kerr solution - would make a compelling case
for the existence of black hole mimickers having multiple critical curves. We
support this claim by... | [
{
"created": "Tue, 19 Oct 2021 14:12:50 GMT",
"version": "v1"
}
] | 2022-04-20 | [
[
"Olmo",
"Gonzalo J.",
""
],
[
"Rubiera-Garcia",
"Diego",
""
],
[
"Gómez",
"Diego Sáez-Chillón",
""
]
] | We argue that the appearance of additional light rings in a shadow observation - beyond the infinite sequence of exponentially demagnified self-similar rings foreseen in the Kerr solution - would make a compelling case for the existence of black hole mimickers having multiple critical curves. We support this claim by d... |
0709.1011 | Takashi Tamaki | Takashi Tamaki, Umpei Miyamoto | Generic features of Einstein-Aether black holes | 9 pages, 9 figures, basic equations and their analytic arguments are
added | Phys.Rev.D77:024026,2008 | 10.1103/PhysRevD.77.024026 | null | gr-qc hep-ph hep-th | null | We reconsider spherically symmetric black hole solutions in Einstein-Aether
theory with the condition that this theory has identical PPN parameters as
those for general relativity, which is the main difference from the previous
research. In contrast with previous study, we allow superluminal propagation of
a spin-0 A... | [
{
"created": "Fri, 7 Sep 2007 07:33:44 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Sep 2007 05:30:16 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Nov 2007 02:27:15 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Tamaki",
"Takashi",
""
],
[
"Miyamoto",
"Umpei",
""
]
] | We reconsider spherically symmetric black hole solutions in Einstein-Aether theory with the condition that this theory has identical PPN parameters as those for general relativity, which is the main difference from the previous research. In contrast with previous study, we allow superluminal propagation of a spin-0 Aet... |
1811.10713 | Maria Okounkova | Maria Okounkova, Mark A. Scheel, Saul A. Teukolsky | Evolving Metric Perturbations in dynamical Chern-Simons Gravity | 15 pages, 11 figures Updated to match version accepted to Phys Rev D | Phys. Rev. D 99, 044019 (2019) | 10.1103/PhysRevD.99.044019 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a well-posed constraint-preserving scheme for evolving first-order
metric perturbations on an arbitrary background with arbitrary source. We use
this scheme to evolve the leading-order metric perturbation in order-reduced
dynamical Chern-Simons gravity (dCS) on a Kerr background. In particular we
test the ... | [
{
"created": "Mon, 26 Nov 2018 22:07:20 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Jan 2019 21:32:04 GMT",
"version": "v2"
}
] | 2019-02-20 | [
[
"Okounkova",
"Maria",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Teukolsky",
"Saul A.",
""
]
] | We present a well-posed constraint-preserving scheme for evolving first-order metric perturbations on an arbitrary background with arbitrary source. We use this scheme to evolve the leading-order metric perturbation in order-reduced dynamical Chern-Simons gravity (dCS) on a Kerr background. In particular we test the st... |
2001.02755 | Kristina Giesel | Kristina Giesel and David Winnekens | Coherent States on the Circle: Semiclassical Matrix Elements in the
Context of Kummer Functions and the Zak transformation | 28 pages, extended section Vi, updated references | null | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend former results for coherent states on the circle in the literature
in two ways. On the one hand, we show that expectation values of fractional
powers of momentum operators can be computed exactly analytically by means of
Kummer's confluent hypergeometric functions. Earlier, these expectation values
have onl... | [
{
"created": "Wed, 8 Jan 2020 21:54:59 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Sep 2021 08:17:42 GMT",
"version": "v2"
}
] | 2021-09-27 | [
[
"Giesel",
"Kristina",
""
],
[
"Winnekens",
"David",
""
]
] | We extend former results for coherent states on the circle in the literature in two ways. On the one hand, we show that expectation values of fractional powers of momentum operators can be computed exactly analytically by means of Kummer's confluent hypergeometric functions. Earlier, these expectation values have only ... |
1303.5376 | Carl Kent | Carl Kent, Elizabeth Winstanley | Scalar field Hadamard renormalisation in $AdS_{n}$ | 3 pages, proceedings of the 13th Marcel Grossmann Meeting, Stockholm,
Sweden, July 1-7, 2012 | Proceedings of the Thirteenth Marcel Grossman Meeting on General
Relativity, pp. 1959-1961 | 10.1142/9789814623995_0328 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We outline an analytic method for computing the renormalised vacuum
expectation value of the quadratic fluctuations and stress-energy tensor
associated with a quantised scalar field propagating on $AdS_{n}$. Explicit
results have been obtained using Hadamard renormalisation in the case of a
massive neutral scalar fie... | [
{
"created": "Thu, 21 Mar 2013 19:30:15 GMT",
"version": "v1"
}
] | 2015-03-16 | [
[
"Kent",
"Carl",
""
],
[
"Winstanley",
"Elizabeth",
""
]
] | We outline an analytic method for computing the renormalised vacuum expectation value of the quadratic fluctuations and stress-energy tensor associated with a quantised scalar field propagating on $AdS_{n}$. Explicit results have been obtained using Hadamard renormalisation in the case of a massive neutral scalar field... |
1312.0846 | D. C. Robinson | D.C.Robinson | Generalized forms and gravitation | 23 pages | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The algebra and calculus of generalized differential forms are reviewed and
employed to construct a class of generalized connections and to investigate
their properties. The class includes generalized connections which are flat
when Einstein's vacuum field equations are satisfied. Generalized Chern-Simons
action prin... | [
{
"created": "Tue, 3 Dec 2013 15:09:07 GMT",
"version": "v1"
}
] | 2013-12-04 | [
[
"Robinson",
"D. C.",
""
]
] | The algebra and calculus of generalized differential forms are reviewed and employed to construct a class of generalized connections and to investigate their properties. The class includes generalized connections which are flat when Einstein's vacuum field equations are satisfied. Generalized Chern-Simons action princi... |
1806.06572 | Benoit Mours | D. Estevez, B. Lieunard, F. Marion, B. Mours, L. Rolland, D. Verkindt | First Tests of a Newtonian Calibrator on an Interferometric
Gravitational Wave Detector | null | Class.Quant.Grav. 35 (2018) no.23, 235009 | 10.1088/1361-6382/aae95f | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The ongoing improvements of the advanced gravitational wave (GW) detectors
are setting challenging requirements on instrument calibration. We report tests
of a calibration technique, based on the well-known gravitation force, which
has been applied for the first time on a large interferometer. The results
obtained wi... | [
{
"created": "Mon, 18 Jun 2018 09:34:05 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Aug 2018 17:02:52 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Dec 2018 06:59:59 GMT",
"version": "v3"
}
] | 2018-12-21 | [
[
"Estevez",
"D.",
""
],
[
"Lieunard",
"B.",
""
],
[
"Marion",
"F.",
""
],
[
"Mours",
"B.",
""
],
[
"Rolland",
"L.",
""
],
[
"Verkindt",
"D.",
""
]
] | The ongoing improvements of the advanced gravitational wave (GW) detectors are setting challenging requirements on instrument calibration. We report tests of a calibration technique, based on the well-known gravitation force, which has been applied for the first time on a large interferometer. The results obtained with... |
2407.15191 | Hayato Motohashi | Hayato Motohashi | Resonant excitation of quasinormal modes of black holes | 9 pages, 4 figures, dataset available at
https://doi.org/10.5281/zenodo.12696857 | null | null | null | gr-qc astro-ph.HE cond-mat.mes-hall hep-th physics.optics | http://creativecommons.org/licenses/by/4.0/ | We elucidate that a distinctive resonant excitation between quasinormal modes
(QNMs) of black holes emerges as a universal phenomenon at avoided crossing
near exceptional point through high-precision numerical analysis and theory of
QNMs based on the framework of non-Hermitian physics. This resonant phenomenon
not on... | [
{
"created": "Sun, 21 Jul 2024 15:11:34 GMT",
"version": "v1"
}
] | 2024-07-24 | [
[
"Motohashi",
"Hayato",
""
]
] | We elucidate that a distinctive resonant excitation between quasinormal modes (QNMs) of black holes emerges as a universal phenomenon at avoided crossing near exceptional point through high-precision numerical analysis and theory of QNMs based on the framework of non-Hermitian physics. This resonant phenomenon not only... |
1604.07568 | Tuan Do | Tuan Q. Do | Higher dimensional massive bigravity | Minor revision with 20 two-column pages, no figure. Some statements
have been revised/added appropriately after receiving some comments.
Calculations are unchanged. Comments are welcome | Phys. Rev. D 94, 044022 (2016) | 10.1103/PhysRevD.94.044022 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study higher dimensional scenarios of massive bigravity, which is a very
interesting extension of nonlinear massive gravity since its reference metric
is assumed to be full dynamical. In particular, the Einstein field equations
along with the following constraint equations for both physical and reference
metrics o... | [
{
"created": "Tue, 26 Apr 2016 08:38:53 GMT",
"version": "v1"
},
{
"created": "Thu, 5 May 2016 08:30:46 GMT",
"version": "v2"
},
{
"created": "Mon, 16 May 2016 18:11:36 GMT",
"version": "v3"
},
{
"created": "Wed, 8 Jun 2016 15:18:18 GMT",
"version": "v4"
}
] | 2016-08-15 | [
[
"Do",
"Tuan Q.",
""
]
] | We study higher dimensional scenarios of massive bigravity, which is a very interesting extension of nonlinear massive gravity since its reference metric is assumed to be full dynamical. In particular, the Einstein field equations along with the following constraint equations for both physical and reference metrics of ... |
1907.07967 | Stephen McCormick | Stephen McCormick | On the charged Riemannian Penrose inequality with charged matter | V2: Updated to agree with published version (various small
clarifications added). 18 pages, comments very welcome :) | Class. Quantum Grav. 37 015007 (2020) | 10.1088/1361-6382/ab50a8 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Throughout the literature on the charged Riemannian Penrose inequality, it is
generally assumed that there is no charged matter present; that is, the
electric field is divergence-free. The aim of this article is to clarify when
the charged Riemannian Penrose inequality holds in the presence of charged
matter, and whe... | [
{
"created": "Thu, 18 Jul 2019 10:23:20 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jun 2021 14:06:21 GMT",
"version": "v2"
}
] | 2021-06-30 | [
[
"McCormick",
"Stephen",
""
]
] | Throughout the literature on the charged Riemannian Penrose inequality, it is generally assumed that there is no charged matter present; that is, the electric field is divergence-free. The aim of this article is to clarify when the charged Riemannian Penrose inequality holds in the presence of charged matter, and when ... |
2301.08709 | Loris Del Grosso | L. Del Grosso, G. Franciolini, P. Pani, A. Urbano | Fermion soliton stars | 16 pages, 5 figures. v2: matches version accepted in PRD. v3: final
plots, matches PRD version | Phys. Rev. D 108, 044024 (2023) | 10.1103/PhysRevD.108.044024 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A real scalar field coupled to a fermion via a Yukawa term can evade no-go
theorems preventing solitonic solutions. For the first time, we study this
model within General Relativity without approximations, finding static and
spherically symmetric solutions that describe fermion soliton stars. The Yukawa
coupling prov... | [
{
"created": "Fri, 20 Jan 2023 18:10:26 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Jul 2023 15:11:45 GMT",
"version": "v2"
},
{
"created": "Wed, 30 Aug 2023 10:22:14 GMT",
"version": "v3"
}
] | 2023-08-31 | [
[
"Del Grosso",
"L.",
""
],
[
"Franciolini",
"G.",
""
],
[
"Pani",
"P.",
""
],
[
"Urbano",
"A.",
""
]
] | A real scalar field coupled to a fermion via a Yukawa term can evade no-go theorems preventing solitonic solutions. For the first time, we study this model within General Relativity without approximations, finding static and spherically symmetric solutions that describe fermion soliton stars. The Yukawa coupling provid... |
1207.0876 | Amir H. Abbassi | Amir H. Abbassi, J. Khodagholizadeh, Amir M. Abbassi | Gravitational Waves in a Spatially Closed deSitter Spacetime | 16 pages,no figures | Eur.Phys.J.C(2013)73:2592 | 10.1140/epjc/s10052-013-2592-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Perturbation of gravitational fields may be decomposed into scalar,vector and
tensor components.In this paper we concern with the evolution of tensor mode
perturbations in a spatially closed deSitter background of RW form. It may be
thought as gravitional waves in a classical description. The chosen background
has th... | [
{
"created": "Wed, 4 Jul 2012 01:55:48 GMT",
"version": "v1"
},
{
"created": "Sun, 18 May 2014 05:51:26 GMT",
"version": "v2"
}
] | 2015-06-05 | [
[
"Abbassi",
"Amir H.",
""
],
[
"Khodagholizadeh",
"J.",
""
],
[
"Abbassi",
"Amir M.",
""
]
] | Perturbation of gravitational fields may be decomposed into scalar,vector and tensor components.In this paper we concern with the evolution of tensor mode perturbations in a spatially closed deSitter background of RW form. It may be thought as gravitional waves in a classical description. The chosen background has the ... |
gr-qc/9801043 | Renaud Parentani | S. Massar and R. Parentani | On the Gravitational Back Reaction to Hawking Radiation | 12 pages, latex | null | null | THU-98/03 | gr-qc | null | We show that a surface term should be added to the Einstein-Hilbert action in
order to properly describe quantum transitions occurring around a black hole.
The introduction of this boundary term has been advocated by Teitelboim and
collaborators and it has been used in the computation of the black hole
entropy. Here,... | [
{
"created": "Tue, 13 Jan 1998 13:03:23 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Massar",
"S.",
""
],
[
"Parentani",
"R.",
""
]
] | We show that a surface term should be added to the Einstein-Hilbert action in order to properly describe quantum transitions occurring around a black hole. The introduction of this boundary term has been advocated by Teitelboim and collaborators and it has been used in the computation of the black hole entropy. Here, w... |
1404.1024 | Minas Tsoukalas | Christos Charmousis, Theodoros Kolyvaris, Eleftherios Papantonopoulos
and Minas Tsoukalas | Black Holes in Bi-scalar Extensions of Horndeski Theories | v2, 16 pages, minor corrections, version accepted to JHEP | null | 10.1007/JHEP07(2014)085 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study certain bi-scalar-tensor theories emanating from conformal symmetry
requirements of Horndeski's four-dimensional action. The former scalar is a
Galileon with shift symmetry whereas the latter scalar is adjusted to have a
higher order conformal coupling. Employing technics from local Weyl geometry
certain Gal... | [
{
"created": "Thu, 3 Apr 2014 17:58:33 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Jul 2014 15:51:50 GMT",
"version": "v2"
}
] | 2015-06-19 | [
[
"Charmousis",
"Christos",
""
],
[
"Kolyvaris",
"Theodoros",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Tsoukalas",
"Minas",
""
]
] | We study certain bi-scalar-tensor theories emanating from conformal symmetry requirements of Horndeski's four-dimensional action. The former scalar is a Galileon with shift symmetry whereas the latter scalar is adjusted to have a higher order conformal coupling. Employing technics from local Weyl geometry certain Galil... |
gr-qc/9403064 | Melnikov Vitaly Nikolaevich | V. D. Ivashchuk and V. N. Melnikov | Multidimensional Cosmology with $m$-Component Perfect Fluid | 16 pages. RGA-CSVR-002/94 | Int.J.Mod.Phys.D3:795-812,1994 | 10.1142/S0218271894000897 | null | gr-qc | null | A cosmological model describing the evolution of $n$ Einstein spaces $(n>1)$
with $m$-component perfect-fluid matter is considered. When all spaces are
Ricci-flat and for any $\alpha$-th component the pressures in all spaces are
proportional to the density: $p_{i}^{(\alpha)} = (1- h_{i}^{(\alpha)})
\rho^{(\alpha)}$, ... | [
{
"created": "Thu, 31 Mar 1994 15:28:05 GMT",
"version": "v1"
}
] | 2011-04-20 | [
[
"Ivashchuk",
"V. D.",
""
],
[
"Melnikov",
"V. N.",
""
]
] | A cosmological model describing the evolution of $n$ Einstein spaces $(n>1)$ with $m$-component perfect-fluid matter is considered. When all spaces are Ricci-flat and for any $\alpha$-th component the pressures in all spaces are proportional to the density: $p_{i}^{(\alpha)} = (1- h_{i}^{(\alpha)}) \rho^{(\alpha)}$, $h... |
gr-qc/0103106 | David Kastor | Jennie Traschen and Daniel Fox | Tension Perturbations of Black Brane Spacetimes | 21 pages, o figures, harvmac | Class.Quant.Grav. 21 (2004) 289-306 | 10.1088/0264-9381/21/1/021 | null | gr-qc hep-th | null | We consider black-brane spacetimes that have at least one spatial translation
Killing field that is tangent to the brane. A new parameter, the tension of a
spacetime, is defined. The tension parameter is associated with spatial
translations in much the same way that the ADM mass is associated with the time
translatio... | [
{
"created": "Wed, 28 Mar 2001 17:19:51 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Sep 2003 15:04:52 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Traschen",
"Jennie",
""
],
[
"Fox",
"Daniel",
""
]
] | We consider black-brane spacetimes that have at least one spatial translation Killing field that is tangent to the brane. A new parameter, the tension of a spacetime, is defined. The tension parameter is associated with spatial translations in much the same way that the ADM mass is associated with the time translation ... |
2004.05636 | Rikpratik Sengupta | Rikpratik Sengupta, B C Paul, Prasenjit Pal | Skyrme Fluid in Anisotropic Universe | 24 pages, 10 figures | Pramana J. Phys. (2022) 96 | 10.1007/s12043-022-02368-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmological solutions are obtained in an anisotropic Kantowski-Sachs (KS)
and Bianchi Type-I universes considering a cosmological constant with Skyrme
fluid. Interestingly, the solutions obtained here in both the KS and Bianchi-I
anisotropic universes are found isotropize at late time due to the presence of
the Skyr... | [
{
"created": "Sun, 12 Apr 2020 15:45:11 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Jul 2021 07:44:15 GMT",
"version": "v2"
},
{
"created": "Sun, 13 Feb 2022 15:51:55 GMT",
"version": "v3"
}
] | 2022-06-09 | [
[
"Sengupta",
"Rikpratik",
""
],
[
"Paul",
"B C",
""
],
[
"Pal",
"Prasenjit",
""
]
] | Cosmological solutions are obtained in an anisotropic Kantowski-Sachs (KS) and Bianchi Type-I universes considering a cosmological constant with Skyrme fluid. Interestingly, the solutions obtained here in both the KS and Bianchi-I anisotropic universes are found isotropize at late time due to the presence of the Skyrme... |
1307.3542 | Jeremy D. Schnittman | Jeremy D. Schnittman (GSFC) | Astrophysics of Super-massive Black Hole Mergers | Invited article for the focus issue on astrophysical black holes in
Classical and Quantum Gravity, guest editors: D. Merritt and L. Rezzolla | null | 10.1088/0264-9381/30/24/244007 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present here an overview of recent work in the subject of astrophysical
manifestations of super-massive black hole (SMBH) mergers. This is a field that
has been traditionally driven by theoretical work, but in recent years has also
generated a great deal of interest and excitement in the observational
astronomy co... | [
{
"created": "Fri, 12 Jul 2013 19:06:27 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Schnittman",
"Jeremy D.",
"",
"GSFC"
]
] | We present here an overview of recent work in the subject of astrophysical manifestations of super-massive black hole (SMBH) mergers. This is a field that has been traditionally driven by theoretical work, but in recent years has also generated a great deal of interest and excitement in the observational astronomy comm... |
1509.06746 | Gabor Kunstatter | Gabor Kunstatter, Hideki Maeda, and Tim Taves | New 2D dilaton gravity for nonsingular black holes | Fully revised version, including covariant field equations, 38 pages,
extended version of arXiv:1509.04243 with details of derivations and proofs | Class. Quant. Grav. 33 (2016) 105005 | 10.1088/0264-9381/33/10/105005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a two-dimensional action that is an extension of spherically
symmetric Einstein-Lanczos-Lovelock gravity. The action contains arbitrary
functions of the areal radius and the norm squared of its gradient, but the
field equations are second order and obey Birkhoff's theorem. In complete
analogy with spheri... | [
{
"created": "Tue, 22 Sep 2015 20:12:56 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Dec 2015 02:07:43 GMT",
"version": "v2"
}
] | 2017-06-13 | [
[
"Kunstatter",
"Gabor",
""
],
[
"Maeda",
"Hideki",
""
],
[
"Taves",
"Tim",
""
]
] | We construct a two-dimensional action that is an extension of spherically symmetric Einstein-Lanczos-Lovelock gravity. The action contains arbitrary functions of the areal radius and the norm squared of its gradient, but the field equations are second order and obey Birkhoff's theorem. In complete analogy with spherica... |
0801.4829 | Francois Limousin | Dorota Gondek-Rosinska (LUTH), Francois Limousin (LUTH) | The final phase of inspiral of strange quark star binaries | null | null | null | null | gr-qc | null | We present calculations of the final phase of inspiral of irrotational
strange star binaries. Two types of equation of state at zero temperature are
used - the MIT bag model and the Dey et al. 1998 model of strange quark matter.
We study the precoalescence stage within the Isenberg-Wilson-Mathews
approximation of Gen... | [
{
"created": "Thu, 31 Jan 2008 07:12:14 GMT",
"version": "v1"
}
] | 2008-02-01 | [
[
"Gondek-Rosinska",
"Dorota",
"",
"LUTH"
],
[
"Limousin",
"Francois",
"",
"LUTH"
]
] | We present calculations of the final phase of inspiral of irrotational strange star binaries. Two types of equation of state at zero temperature are used - the MIT bag model and the Dey et al. 1998 model of strange quark matter. We study the precoalescence stage within the Isenberg-Wilson-Mathews approximation of Gener... |
1301.2214 | Jonathan Engle | Jonathan Engle | Corrigendum: The Plebanski sectors of the EPRL vertex | Corrigendum to arXiv:1107.0709, 4 pages | null | 10.1088/0264-9381/30/4/049501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We correct what amounts to a sign error in the proof of part (i.) of theorem
3 in Class.Quant.Grav.28 225003 (arXiv:1107.0709). The Plebanski sectors
isolated by the linear simplicity constraints do not change --- they are still
the three sectors (deg), (II+), and (II-). What changes is the characterization
of the co... | [
{
"created": "Thu, 10 Jan 2013 18:46:27 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Engle",
"Jonathan",
""
]
] | We correct what amounts to a sign error in the proof of part (i.) of theorem 3 in Class.Quant.Grav.28 225003 (arXiv:1107.0709). The Plebanski sectors isolated by the linear simplicity constraints do not change --- they are still the three sectors (deg), (II+), and (II-). What changes is the characterization of the cont... |
gr-qc/9810050 | Vladimir Dzhunushaliev | V. Dzhunushaliev and D. Singleton | Einstein-Cartan-Heisenberg Theory of Gravity with Dynamical Torsion | 15 pp., LATEX, references added, and discussion of several points
changed/expanded | Phys.Lett. A257 (1999) 7-13 | 10.1016/S0375-9601(99)00282-0 | null | gr-qc hep-th | null | On the basis of an algebraic relation between torsion and a classical spinor
field a new interpretation of Einstein-Cartan gravity interacting with
classical spinor field is proposed. In this approach the spinor field becomes
an auxiliary field and the dynamical equation for this field (the Heisenberg
equation) is a ... | [
{
"created": "Thu, 15 Oct 1998 09:21:19 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Jun 1999 17:53:47 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Dzhunushaliev",
"V.",
""
],
[
"Singleton",
"D.",
""
]
] | On the basis of an algebraic relation between torsion and a classical spinor field a new interpretation of Einstein-Cartan gravity interacting with classical spinor field is proposed. In this approach the spinor field becomes an auxiliary field and the dynamical equation for this field (the Heisenberg equation) is a dy... |
gr-qc/9904023 | Jacques Renaud | J-P. Gazeau, J. Renaud, M. V. Takook | Gupta-Bleuler quantization for minimally coupled scalar fields in de
Sitter space | 20 pages, appear in class. quantum grav | Class.Quant.Grav. 17 (2000) 1415-1434 | 10.1088/0264-9381/17/6/307 | null | gr-qc | null | We present in this paper a fully covariant quantization of the
minimally-coupled massless field on de Sitter space. We thus obtain a formalism
free of any infrared (e.g logarithmic) divergence. Our method is based on a
rigorous group theoretical approach combined with a suitable adaptation (Krein
spaces) of the Wight... | [
{
"created": "Thu, 8 Apr 1999 18:55:54 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Jan 2000 12:54:32 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Gazeau",
"J-P.",
""
],
[
"Renaud",
"J.",
""
],
[
"Takook",
"M. V.",
""
]
] | We present in this paper a fully covariant quantization of the minimally-coupled massless field on de Sitter space. We thus obtain a formalism free of any infrared (e.g logarithmic) divergence. Our method is based on a rigorous group theoretical approach combined with a suitable adaptation (Krein spaces) of the Wightma... |
gr-qc/9709068 | Max Banados | Maximo Banados and Mauricio Contreras | Darboux coordinates for (first order) tetrad gravity | 12 pages, Latex. Minor presentation changes and some references
added. Version to appear in Classical and Quantum Gravity | Class.Quant.Grav. 15 (1998) 1527-1534 | 10.1088/0264-9381/15/6/009 | null | gr-qc hep-th | null | The Hamiltonian form of the Hilbert action in the first order tetrad
formalism is examined. We perform a non-linear field redefinition of the
canonical variables isolating the part of the spin connection which is
canonically conjugate to the tetrad. The geometrical meaning of the constraints
written in these new vari... | [
{
"created": "Thu, 25 Sep 1997 23:18:44 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Sep 1997 16:39:29 GMT",
"version": "v2"
},
{
"created": "Sat, 28 Feb 1998 23:57:09 GMT",
"version": "v3"
}
] | 2009-10-30 | [
[
"Banados",
"Maximo",
""
],
[
"Contreras",
"Mauricio",
""
]
] | The Hamiltonian form of the Hilbert action in the first order tetrad formalism is examined. We perform a non-linear field redefinition of the canonical variables isolating the part of the spin connection which is canonically conjugate to the tetrad. The geometrical meaning of the constraints written in these new variab... |
1009.3293 | Valerio Ferroni | Valerio Ferroni and Alexander Silbergleit | Electrostatic Patch Effect in Cylindrical Geometry. II. Forces | 32 pages, 10 Figures. Submitted to Classical and Quantum Gravity | Class.Quant.Grav.28:145002,2011 | 10.1088/0264-9381/28/14/145002 | null | gr-qc physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We continue our study of patch effect (PE) for two close cylindrical
conductors with parallel axes, slightly shifted against each other in the
radial and by any length in the axial direction, started in [1], where the
potential and energy in the gap were calculated to the second order in the
small transverse shift, a... | [
{
"created": "Thu, 16 Sep 2010 22:09:35 GMT",
"version": "v1"
}
] | 2011-06-07 | [
[
"Ferroni",
"Valerio",
""
],
[
"Silbergleit",
"Alexander",
""
]
] | We continue our study of patch effect (PE) for two close cylindrical conductors with parallel axes, slightly shifted against each other in the radial and by any length in the axial direction, started in [1], where the potential and energy in the gap were calculated to the second order in the small transverse shift, and... |
2310.12185 | Kyriakos Papadopoulos | Markus Fr\"ob, Albert Much and Kyriakos Papadopoulos | Relative Entropy in de Sitter is a Noether Charge | null | Phys. Rev. D 108 (2023) 105004 | 10.1103/PhysRevD.108.105004 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the relative entropy between the vacuum and a coherent state for a
massive scalar field in de Sitter spacetime, using Tomita-Takesaki modular
theory and the Araki-Uhlmann formula for the relative entropy. Embedding de
Sitter spacetime as a hyperboloid in the ambient Minkowski space, we can
restrict the Min... | [
{
"created": "Wed, 18 Oct 2023 04:51:52 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Nov 2023 13:03:59 GMT",
"version": "v2"
}
] | 2023-11-22 | [
[
"Fröb",
"Markus",
""
],
[
"Much",
"Albert",
""
],
[
"Papadopoulos",
"Kyriakos",
""
]
] | We compute the relative entropy between the vacuum and a coherent state for a massive scalar field in de Sitter spacetime, using Tomita-Takesaki modular theory and the Araki-Uhlmann formula for the relative entropy. Embedding de Sitter spacetime as a hyperboloid in the ambient Minkowski space, we can restrict the Minko... |
1811.10873 | M. Umair Shahzad | M. Umair Shahzad, Abdul Jawad | Thermodynamics of Black holes With Higher Order Corrected Entropy | 23 pages, 10 figures, accepted for publication by Canadian Journal of
Physics. arXiv admin note: text overlap with arXiv:1701.08650 by other
authors | null | 10.1139/cjp-2018-0091 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For analyzing the thermodynamical behavior of two well-known black holes such
as RN-AdS black hole with global monopole and $f(R)$ black hole, we consider
the higher order logarithmic corrected entropy. We develop various
thermodynamical properties such as, entropy, specific heats, pressure, Gibb's
and Helmhotz free ... | [
{
"created": "Tue, 27 Nov 2018 08:46:01 GMT",
"version": "v1"
}
] | 2018-11-28 | [
[
"Shahzad",
"M. Umair",
""
],
[
"Jawad",
"Abdul",
""
]
] | For analyzing the thermodynamical behavior of two well-known black holes such as RN-AdS black hole with global monopole and $f(R)$ black hole, we consider the higher order logarithmic corrected entropy. We develop various thermodynamical properties such as, entropy, specific heats, pressure, Gibb's and Helmhotz free en... |
1111.3676 | Sergey Manida | Sergey N. Manida | Generalized Relativistic Kinematics | null | Theor.Math.Phys., 169(2): 1643-1655 (2011) | 10.1007/s11232-011-0141-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a method for deforming an extended Galilei algebra that leads to a
nonstandard realization of the Poincar\'e group with the Fock-Lorentz linear
fractional transformations. The invariant parameter in these transformations
has the dimension of length. Combining this deformation with the standard one
(with an... | [
{
"created": "Tue, 15 Nov 2011 22:07:18 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Manida",
"Sergey N.",
""
]
] | We propose a method for deforming an extended Galilei algebra that leads to a nonstandard realization of the Poincar\'e group with the Fock-Lorentz linear fractional transformations. The invariant parameter in these transformations has the dimension of length. Combining this deformation with the standard one (with an i... |
1212.5150 | Martin Bojowald | Martin Bojowald | A loop quantum multiverse? | 10 pages, 9 figures, based on a plenary talk given at Multicosmofun
'12, Szeczin, Poland | AIP Conf. Proc. 1514 (2013) 21-30 | 10.1063/1.4791718 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inhomogeneous space-times in loop quantum cosmology have come under better
control with recent advances in effective methods. Even highly inhomogeneous
situations, for which multiverse scenarios provide extreme examples, can now be
considered at least qualitatively.
| [
{
"created": "Thu, 20 Dec 2012 17:19:02 GMT",
"version": "v1"
}
] | 2013-11-13 | [
[
"Bojowald",
"Martin",
""
]
] | Inhomogeneous space-times in loop quantum cosmology have come under better control with recent advances in effective methods. Even highly inhomogeneous situations, for which multiverse scenarios provide extreme examples, can now be considered at least qualitatively. |
2207.04279 | Giorgio Immirzi | Yogendra Srivastava, Giorgio Immirzi, John Swain, Orland Panella,
Simone Pacetti | General Relativity versus Dark Matter for rotating galaxies | 22 pages, 4 figures; v2, minor corrections, e-mails added | null | 10.1140/epjc/s10052-022-11031-3 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | A very general class of axially-symmetric metrics in general relativity (GR)
that includes rotations is used to discuss the dynamics of
rotationally-supported galaxies. The exact vacuum solutions of the Einstein
equations for this extended Weyl class of metrics allow us to deduce rigorously
the following: (i) GR rota... | [
{
"created": "Sat, 9 Jul 2022 14:40:34 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jul 2022 16:36:21 GMT",
"version": "v2"
}
] | 2023-02-15 | [
[
"Srivastava",
"Yogendra",
""
],
[
"Immirzi",
"Giorgio",
""
],
[
"Swain",
"John",
""
],
[
"Panella",
"Orland",
""
],
[
"Pacetti",
"Simone",
""
]
] | A very general class of axially-symmetric metrics in general relativity (GR) that includes rotations is used to discuss the dynamics of rotationally-supported galaxies. The exact vacuum solutions of the Einstein equations for this extended Weyl class of metrics allow us to deduce rigorously the following: (i) GR rotati... |
1504.08156 | Antonin Coutant | Antonin Coutant | Semiclassical momentum representation in quantum cosmology | 21 pages, 3 figures. Several clarifications, Sec.IV.C added. Typo
corrected, matches published version | Phys. Rev. D 93, 043520 (2016) | 10.1103/PhysRevD.93.043520 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well-known that the standard WKB approximation fails to provide
semiclassical solutions in the vicinity of turning points. However, turning
points arise in many cosmological scenarios. In a previous work, we obtained a
new class of semiclassical solutions of the Wheeler-deWitt equation using the
conjugate momen... | [
{
"created": "Thu, 30 Apr 2015 10:30:24 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Nov 2015 11:56:40 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Feb 2016 12:31:33 GMT",
"version": "v3"
}
] | 2016-02-12 | [
[
"Coutant",
"Antonin",
""
]
] | It is well-known that the standard WKB approximation fails to provide semiclassical solutions in the vicinity of turning points. However, turning points arise in many cosmological scenarios. In a previous work, we obtained a new class of semiclassical solutions of the Wheeler-deWitt equation using the conjugate momentu... |
1903.06471 | Suman Ghosh | Suman Ghosh | Renormalized stress tensor of a quantized massless scalar field in
warped cosmological braneworld background | 17+1 preprint pages. To appear in EPJC | null | 10.1140/epjc/s10052-019-6760-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Energy momentum tensor of a conformally coupled quantum scalar field in five
dimensional warped cosmological spacetimes is studied. We look at situations
where the four dimensional part represents a cosmological thick brane and the
scale of the extra dimension is time dependent. Renormalization of the
components of t... | [
{
"created": "Fri, 15 Mar 2019 11:33:46 GMT",
"version": "v1"
}
] | 2019-03-27 | [
[
"Ghosh",
"Suman",
""
]
] | Energy momentum tensor of a conformally coupled quantum scalar field in five dimensional warped cosmological spacetimes is studied. We look at situations where the four dimensional part represents a cosmological thick brane and the scale of the extra dimension is time dependent. Renormalization of the components of the... |
0711.4644 | Steve Drasco | Steve Drasco | Verifying black hole orbits with gravitational spectroscopy | 18 pages, expanded section on detection algorithms and made minor
edits. Final published version | Phys.Rev.D79:104016,2009 | 10.1103/PhysRevD.79.104016 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves from test masses bound to geodesic orbits of rotating
black holes are simulated, using Teukolsky's black hole perturbation formalism,
for about ten thousand generic orbital configurations. Each binary radiates
power exclusively in modes with frequencies that are
integer-linear-combinations of the ... | [
{
"created": "Thu, 29 Nov 2007 02:48:55 GMT",
"version": "v1"
},
{
"created": "Fri, 8 May 2009 04:51:14 GMT",
"version": "v2"
}
] | 2009-07-30 | [
[
"Drasco",
"Steve",
""
]
] | Gravitational waves from test masses bound to geodesic orbits of rotating black holes are simulated, using Teukolsky's black hole perturbation formalism, for about ten thousand generic orbital configurations. Each binary radiates power exclusively in modes with frequencies that are integer-linear-combinations of the or... |
1511.05107 | Paolo Glorioso | Paolo Glorioso | Classification of certain asymptotically AdS space-times with Ricci-flat
boundary | 30 pages; v2: two references added, typos corrected, some
explanations improved; v.3: title changed, minor modifications of the
abstract, improved introduction of secs. II and V, three references added,
two typos corrected (published version) | JHEP 1612 (2016) 126 | 10.1007/JHEP12(2016)126 | MIT-CTP/4736 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We classify solutions to Einstein's equations in AdS with Ricci-flat boundary
metric and with covariantly constant boundary stress tensor, which in general
is not diagonalizable, i.e. it does not admit a reference frame. New solutions
are found, and in the context of the AdS/CFT duality they should describe a
boundar... | [
{
"created": "Mon, 16 Nov 2015 19:59:41 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Dec 2015 20:33:47 GMT",
"version": "v2"
},
{
"created": "Fri, 27 Jan 2017 18:37:24 GMT",
"version": "v3"
}
] | 2017-01-30 | [
[
"Glorioso",
"Paolo",
""
]
] | We classify solutions to Einstein's equations in AdS with Ricci-flat boundary metric and with covariantly constant boundary stress tensor, which in general is not diagonalizable, i.e. it does not admit a reference frame. New solutions are found, and in the context of the AdS/CFT duality they should describe a boundary ... |
gr-qc/9608041 | Karen Brewster | Abhay Ashtekar, Jiri Bicak, Bernd G. Schmidt | Behavior of Einstein-Rosen Waves at Null Infinity | 16 pages, REVETEX, CGPG-96/5-2 | Phys.Rev. D55 (1997) 687-694 | 10.1103/PhysRevD.55.687 | null | gr-qc | null | The asymptotic behavior of Einstein-Rosen waves at null infinity in 4
dimensions is investigated in {\it all} directions by exploiting the relation
between the 4-dimensional space-time and the 3-dimensional symmetry reduction
thereof. Somewhat surprisingly, the behavior in a generic direction is {\it
better} than tha... | [
{
"created": "Fri, 16 Aug 1996 17:49:29 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Bicak",
"Jiri",
""
],
[
"Schmidt",
"Bernd G.",
""
]
] | The asymptotic behavior of Einstein-Rosen waves at null infinity in 4 dimensions is investigated in {\it all} directions by exploiting the relation between the 4-dimensional space-time and the 3-dimensional symmetry reduction thereof. Somewhat surprisingly, the behavior in a generic direction is {\it better} than that ... |
1904.04883 | Oswaldo Duarte Miranda odm | Eunice Bezerra and Oswaldo D. Miranda | Mimetic gravity: mimicking the dynamics of the primeval universe in the
context of loop quantum cosmology | 13 pages, 2 figures | Eur. Phys. J. C, 79 4 (2019) 310 [published online April 6] | 10.1140/epjc/s10052-019-6823-3 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Mimetic gravity can be described as a formulation capable of mimicking
different evolutionary scenarios regarding the universe dynamics.
Notwithstanding its initial aim of producing a similar evolution to the one
expected from the dark components of the standard cosmology, a recent
association with loop quantum cosmo... | [
{
"created": "Tue, 9 Apr 2019 19:50:58 GMT",
"version": "v1"
}
] | 2019-05-01 | [
[
"Bezerra",
"Eunice",
""
],
[
"Miranda",
"Oswaldo D.",
""
]
] | Mimetic gravity can be described as a formulation capable of mimicking different evolutionary scenarios regarding the universe dynamics. Notwithstanding its initial aim of producing a similar evolution to the one expected from the dark components of the standard cosmology, a recent association with loop quantum cosmolo... |
gr-qc/0008038 | Matthias Arnsdorf | Matthias Arnsdorf | Loop Quantum Gravity and Asymptotically Flat Spaces | 15 pages, based on talk presented at the MG IX meeting in Rome, July
2000 | null | null | null | gr-qc | null | After motivating why the study of asymptotically flat spaces is important in
loop quantum gravity, we review the extension of the standard framework of this
theory to the asymptotically flat sector based on the GNS construction. In
particular, we provide a general procedure for constructing new Hilbert spaces
for loo... | [
{
"created": "Tue, 15 Aug 2000 15:24:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Arnsdorf",
"Matthias",
""
]
] | After motivating why the study of asymptotically flat spaces is important in loop quantum gravity, we review the extension of the standard framework of this theory to the asymptotically flat sector based on the GNS construction. In particular, we provide a general procedure for constructing new Hilbert spaces for loop ... |
1804.05846 | Troels Harmark | Gianluca Grignani, Troels Harmark, Marta Orselli | On the existence of the Blandford-Znajek monopole for a slowly rotating
Kerr black hole | 8 pages, pdflatex. v2: minor typos corrected, conclusion improved,
acknowledgments added. v3: published version, references added, MAE
explanation and conclusions slightly expanded | Phys. Rev. D 98, 084056 (2018) | 10.1103/PhysRevD.98.084056 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Blandford-Znajek monopole is a conjectured solution of force-free
electrodynamics in the vicinity of a slowly rotating Kerr black hole,
supposedly defined as a perturbation in small angular momentum. It is used to
argue for the extraction of energy from rotating black holes by the
Blandford-Znajek process. We set... | [
{
"created": "Mon, 16 Apr 2018 18:00:01 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Jun 2018 12:32:39 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Oct 2018 13:17:45 GMT",
"version": "v3"
}
] | 2018-11-07 | [
[
"Grignani",
"Gianluca",
""
],
[
"Harmark",
"Troels",
""
],
[
"Orselli",
"Marta",
""
]
] | The Blandford-Znajek monopole is a conjectured solution of force-free electrodynamics in the vicinity of a slowly rotating Kerr black hole, supposedly defined as a perturbation in small angular momentum. It is used to argue for the extraction of energy from rotating black holes by the Blandford-Znajek process. We set u... |
gr-qc/0302054 | Yoshiaki Himemoto | Yoshiaki Himemoto and Misao Sasaki | Braneworld inflation driven by dynamics of a bulk scalar field | 10 pages, 1 figure, 1 reference added, typos corrected, to be
published in Progress of Theoretical Physics Supplement No. 148 "Brane World:
New Perspective in Cosmology" | Prog.Theor.Phys.Suppl.148:235-244,2003 | 10.1143/PTPS.148.235 | null | gr-qc astro-ph hep-ph hep-th | null | We review a viable alternative scenario of the inflationary universe in the
context of the Randall-Sundrum (RS) braneworld. In this scenario, the dynamics
of a 5-dimensional scalar field, which we call a bulk scalar field, plays the
central role. Focusing on the second (single-brane) RS model, we discuss
braneworld i... | [
{
"created": "Thu, 13 Feb 2003 13:51:45 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Feb 2003 08:54:38 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Himemoto",
"Yoshiaki",
""
],
[
"Sasaki",
"Misao",
""
]
] | We review a viable alternative scenario of the inflationary universe in the context of the Randall-Sundrum (RS) braneworld. In this scenario, the dynamics of a 5-dimensional scalar field, which we call a bulk scalar field, plays the central role. Focusing on the second (single-brane) RS model, we discuss braneworld inf... |
0803.4459 | Lars Andersson | Lars Andersson | Report on GRG18, Session A3, Mathematical Studies of the Field Equations | 12 pages | Class.Quant.Grav.25:114016,2008 | 10.1088/0264-9381/25/11/114016 | AEI-2008-020 | gr-qc | http://creativecommons.org/licenses/by/3.0/ | In this report I will give a summary of some of the main topics covered in
Session A3, mathematical studies of the field equations, at GRG18, Sydney.
Unfortunately, due to length constraints, some of the topics covered at the
session will be very briefly mentioned or left out altogether. The summary is
mainly based o... | [
{
"created": "Mon, 31 Mar 2008 13:40:27 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Apr 2008 08:13:29 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Andersson",
"Lars",
""
]
] | In this report I will give a summary of some of the main topics covered in Session A3, mathematical studies of the field equations, at GRG18, Sydney. Unfortunately, due to length constraints, some of the topics covered at the session will be very briefly mentioned or left out altogether. The summary is mainly based on ... |
1006.3743 | Deborah A. Konkowski | D.A. Konkowski, T.M. Helliwell | Quantum particle behavior in classically singular spacetimes | 3 pages, no figures, submitted to Proceedings of the 12th Marcel
Grossmann Meeting on General Relativity and Gravitation, Paris, July 13-18,
2009 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the classical and quantum singularity structure of a broad class of
spacetimes with asymptotically power-law behavior near the origin. Quantum
considerations "heal" a large class of scalar curvature singularities.
| [
{
"created": "Fri, 18 Jun 2010 16:23:00 GMT",
"version": "v1"
}
] | 2010-06-21 | [
[
"Konkowski",
"D. A.",
""
],
[
"Helliwell",
"T. M.",
""
]
] | We review the classical and quantum singularity structure of a broad class of spacetimes with asymptotically power-law behavior near the origin. Quantum considerations "heal" a large class of scalar curvature singularities. |
1112.6318 | Ziyang Hu | Ziyang Hu | The implications of Galilean invariance for classical point particle
lagrangians | 9 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the implications of the requirement of Galilean invariance for
classical point particle lagrangians, in which the space is not assumed to be
flat to begin with. We show that for the free, time-independent lagrangian,
this requirement is equivalent to the existence of gradient Killing vectors on
space, whic... | [
{
"created": "Thu, 29 Dec 2011 14:28:49 GMT",
"version": "v1"
}
] | 2011-12-30 | [
[
"Hu",
"Ziyang",
""
]
] | We explore the implications of the requirement of Galilean invariance for classical point particle lagrangians, in which the space is not assumed to be flat to begin with. We show that for the free, time-independent lagrangian, this requirement is equivalent to the existence of gradient Killing vectors on space, which ... |
2107.07146 | Naoki Tsukamoto | Naoki Tsukamoto | Gravitational lensing by a photon sphere in a Reissner-Nordstr\"{o}m
naked singularity spacetime in strong deflection limits | 11 pages, 7 figures, calculations are fixed, accepted to be published
in Physical Review D | Phys. Rev. D. 104, 124016 (2021) | 10.1103/PhysRevD.104.124016 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate gravitational lensing by a photon sphere in a
Reissner-Nordstr\"{o}m naked singularity spacetime in strong deflection limits.
Because of the nonexistence of an event horizon and the existence of a
potential barrier near an antiphoton sphere, infinite numbers of images
slightly inside and outside of a p... | [
{
"created": "Thu, 15 Jul 2021 06:21:48 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Jul 2021 15:33:30 GMT",
"version": "v2"
},
{
"created": "Tue, 20 Jul 2021 09:54:34 GMT",
"version": "v3"
},
{
"created": "Wed, 21 Jul 2021 09:48:31 GMT",
"version": "v4"
},
{
"c... | 2021-12-06 | [
[
"Tsukamoto",
"Naoki",
""
]
] | We investigate gravitational lensing by a photon sphere in a Reissner-Nordstr\"{o}m naked singularity spacetime in strong deflection limits. Because of the nonexistence of an event horizon and the existence of a potential barrier near an antiphoton sphere, infinite numbers of images slightly inside and outside of a pho... |
gr-qc/0306078 | Yonatan Oren | Yonatan Oren and Tsvi Piran | On the Collapse of Charged Scalar Fields | Accepted for publication in Phys. Rev. D | Phys.Rev. D68 (2003) 044013 | 10.1103/PhysRevD.68.044013 | null | gr-qc | null | We explore numerically the evolution of a collapsing spherical shell of
charged, massless scalar field. We obtain an external \RN space-time, and an
inner space-time that is bounded by a singularity on the Cauchy Horizon. We
compare these results with previous analysis and discuss some of the numerical
problems encou... | [
{
"created": "Tue, 17 Jun 2003 10:18:27 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Oren",
"Yonatan",
""
],
[
"Piran",
"Tsvi",
""
]
] | We explore numerically the evolution of a collapsing spherical shell of charged, massless scalar field. We obtain an external \RN space-time, and an inner space-time that is bounded by a singularity on the Cauchy Horizon. We compare these results with previous analysis and discuss some of the numerical problems encount... |
2002.03551 | Puskar Mondal | Puskar Mondal | Big-bang limit of $2+1$ gravity and Thurston boundary of Teichm\"uller
space | 46 pages | null | null | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the asymptotic behavior of the solution curves of the dynamics of
spacetimes of the topological type $\Sigma_{p}\times \mathbb{R}$, $p>1$, where
$\Sigma_{p}$ is a closed Riemann surface of genus $p$, in the regime of $2+1$
dimensional classical general relativity. The configuration space of the gauge
fixed d... | [
{
"created": "Mon, 10 Feb 2020 05:20:21 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Feb 2020 21:51:26 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Feb 2020 16:10:17 GMT",
"version": "v3"
},
{
"created": "Fri, 17 Jul 2020 21:47:55 GMT",
"version": "v4"
},
{
"c... | 2024-01-17 | [
[
"Mondal",
"Puskar",
""
]
] | We study the asymptotic behavior of the solution curves of the dynamics of spacetimes of the topological type $\Sigma_{p}\times \mathbb{R}$, $p>1$, where $\Sigma_{p}$ is a closed Riemann surface of genus $p$, in the regime of $2+1$ dimensional classical general relativity. The configuration space of the gauge fixed dyn... |
gr-qc/0501098 | Fu-Wen Shu | Fu-Wen Shu, You-Gen Shen | Quasinormal modes in Schwarschild black holes due to arbitrary spin
fields | 11 pages, 3 figures | Phys.Lett.B619:340-346,2005 | 10.1016/j.physletb.2005.05.077 | null | gr-qc | null | The Newman-Penrose formalism is used to deal with the massless scalar,
neutrino, electromagnetic, gravitino and gravitational quasinormal modes (QNMs)
in Schwarzschild black holes in a united form. The quasinormal mode frequencies
evaluated by using the 3rd-order WKB potential approximation show that the
boson pertur... | [
{
"created": "Sun, 30 Jan 2005 18:23:17 GMT",
"version": "v1"
},
{
"created": "Tue, 31 May 2005 14:27:20 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Shu",
"Fu-Wen",
""
],
[
"Shen",
"You-Gen",
""
]
] | The Newman-Penrose formalism is used to deal with the massless scalar, neutrino, electromagnetic, gravitino and gravitational quasinormal modes (QNMs) in Schwarzschild black holes in a united form. The quasinormal mode frequencies evaluated by using the 3rd-order WKB potential approximation show that the boson perturba... |
2205.06094 | Theodoros Papanikolaou | Theodoros Papanikolaou, Charalampos Tzerefos, Spyros Basilakos,
Emmanuel N. Saridakis | No constraints for $f(T)$ gravity from gravitational waves induced from
primordial black hole fluctuations | Published in Eur. Phys. J. C. arXiv admin note: text overlap with
arXiv:2112.15059 | Eur.Phys.J.C 83 (2023) | 10.1140/epjc/s10052-022-11157-4 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Primordial black hole (PBH) fluctuations can induce a stochastic
gravitational wave background at second order, and since this procedure is
sensitive to the underlying gravitational theory it can be used as a novel tool
to test general relativity and extract constraints on possible modified gravity
deviations. We app... | [
{
"created": "Thu, 12 May 2022 14:00:16 GMT",
"version": "v1"
},
{
"created": "Tue, 16 May 2023 14:22:04 GMT",
"version": "v2"
}
] | 2023-05-17 | [
[
"Papanikolaou",
"Theodoros",
""
],
[
"Tzerefos",
"Charalampos",
""
],
[
"Basilakos",
"Spyros",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | Primordial black hole (PBH) fluctuations can induce a stochastic gravitational wave background at second order, and since this procedure is sensitive to the underlying gravitational theory it can be used as a novel tool to test general relativity and extract constraints on possible modified gravity deviations. We apply... |
gr-qc/0612028 | Lukasz Andrzej Glinka | B.M. Barbashov, L.A. Glinka, V.N. Pervushin, A.F. Zakharov | Hamiltonian General Relativity in CMB frame | 16 pages, 4 figures | null | null | null | gr-qc | null | A collection of requirements to the General Relativity that follow from the
WMAP observations of the Cosmic Microwave Background radiation anisotropy as an
inertial frame are discussed. These obligations include the separation of both
the CMB frame from the diffeomorphisms and the diffeo-invariant cosmic
evolution fr... | [
{
"created": "Tue, 5 Dec 2006 10:11:40 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Dec 2006 13:28:43 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Barbashov",
"B. M.",
""
],
[
"Glinka",
"L. A.",
""
],
[
"Pervushin",
"V. N.",
""
],
[
"Zakharov",
"A. F.",
""
]
] | A collection of requirements to the General Relativity that follow from the WMAP observations of the Cosmic Microwave Background radiation anisotropy as an inertial frame are discussed. These obligations include the separation of both the CMB frame from the diffeomorphisms and the diffeo-invariant cosmic evolution from... |
1909.04205 | Ben Kain | Ben Kain | Are gravitating magnetic monopoles stable? | 12 pages, 5 figures | Phys. Rev. D 100, 063003 (2019) | 10.1103/PhysRevD.100.063003 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitating Julia-Zee dyon is a particle-like solution with both electric
and magnetic charge. It is found in the Einstein-Yang-Mills-Higgs system of
SU(2) with a scalar field in the adjoint representation coupled to gravity.
Within the magnetic ansatz this system is reduced from describing dyons to
describing th... | [
{
"created": "Tue, 10 Sep 2019 00:30:51 GMT",
"version": "v1"
}
] | 2019-09-25 | [
[
"Kain",
"Ben",
""
]
] | The gravitating Julia-Zee dyon is a particle-like solution with both electric and magnetic charge. It is found in the Einstein-Yang-Mills-Higgs system of SU(2) with a scalar field in the adjoint representation coupled to gravity. Within the magnetic ansatz this system is reduced from describing dyons to describing the ... |
gr-qc/0007029 | Salvatore Capozziello | S.Capozziello, A. Feoli, G. Lambiase, G. Papini | Thin shell quantization in Weyl spacetime | 9 pages, Latex, to appear in Phys. Lett. A | Phys.Lett. A273 (2000) 25-30 | 10.1016/S0375-9601(00)00478-3 | null | gr-qc | null | We study the problem of quantization of thin shells in a Weyl-Dirac theory by
deriving a Wheeler-DeWitt equation from the dynamics. Solutions are found which
have interpretations in both cosmology and particle physics.
| [
{
"created": "Fri, 14 Jul 2000 09:42:41 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Capozziello",
"S.",
""
],
[
"Feoli",
"A.",
""
],
[
"Lambiase",
"G.",
""
],
[
"Papini",
"G.",
""
]
] | We study the problem of quantization of thin shells in a Weyl-Dirac theory by deriving a Wheeler-DeWitt equation from the dynamics. Solutions are found which have interpretations in both cosmology and particle physics. |
gr-qc/9712021 | N. K. Dadhich | Naresh Dadhich | A duality relation : global monopole and texture | 10 pages, LaTeX version | null | null | IUCAA-60/97 | gr-qc | null | We resolve the entire gravitational field;i.e. the Riemann curvature into its
electric and magnetic parts. In general, the vacuum Einstein equation is
symmetric in active and passive electric parts. However it turns out that the
Schwarzschild solution, which is the unique spherically symmetric vacuum
solutions can be... | [
{
"created": "Wed, 3 Dec 1997 05:10:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dadhich",
"Naresh",
""
]
] | We resolve the entire gravitational field;i.e. the Riemann curvature into its electric and magnetic parts. In general, the vacuum Einstein equation is symmetric in active and passive electric parts. However it turns out that the Schwarzschild solution, which is the unique spherically symmetric vacuum solutions can be c... |
1802.01801 | Vladimir Folomeev | Vladimir Folomeev | Anisotropic neutron stars in $R^2$ gravity | 14 pages, 4 figures, minor corrections to content, new references
added, version published in PRD | Phys. Rev. D 97, 124009 (2018) | 10.1103/PhysRevD.97.124009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider static neutron stars within the framework of $R^2$ gravity. The
neutron fluid is described by three different types of realistic equations of
state (soft, moderately stiff, and stiff). Using the observational data on the
neutron star mass-radius relation, it is demonstrated that the characteristics
of the... | [
{
"created": "Tue, 6 Feb 2018 05:13:45 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jun 2018 10:49:34 GMT",
"version": "v2"
}
] | 2018-06-08 | [
[
"Folomeev",
"Vladimir",
""
]
] | We consider static neutron stars within the framework of $R^2$ gravity. The neutron fluid is described by three different types of realistic equations of state (soft, moderately stiff, and stiff). Using the observational data on the neutron star mass-radius relation, it is demonstrated that the characteristics of the o... |
2204.10734 | Sumanta Chakraborty | Sumanta Chakraborty and Naresh Dadhich | Universality of the Buchdahl sphere | Published version, 20 pages, 2 figures | Eur. Phys. J. C 83, 677 (2023) | 10.1140/epjc/s10052-023-11793-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Buchdahl sphere, the limiting stable isotropic stellar structure without
exotic matter, plays a very important role in our understanding of how compact
an astrophysical object can be. Here, we show certain universal properties
associated with the Buchdahl sphere, in the sense that these properties will
not change wit... | [
{
"created": "Fri, 22 Apr 2022 14:45:13 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Aug 2023 02:38:51 GMT",
"version": "v2"
}
] | 2023-08-22 | [
[
"Chakraborty",
"Sumanta",
""
],
[
"Dadhich",
"Naresh",
""
]
] | Buchdahl sphere, the limiting stable isotropic stellar structure without exotic matter, plays a very important role in our understanding of how compact an astrophysical object can be. Here, we show certain universal properties associated with the Buchdahl sphere, in the sense that these properties will not change with ... |
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