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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1202.0565 | Oleg Zaslavskii | O. B. Zaslavskii | Acceleration of particles by black holes as a result of deceleration:
ultimate manifestation of kinematic nature of BSW effect | 11 pages. Misprints corrected | Phys. Lett. B 712 (2012) 161 | 10.1016/j.physletb.2012.05.009 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recently discovered so-called BSW effect consists in the unbound growth
of the energy E_{c.m.} in the centre of mass frame of two colliding particles
near the black hole horizon. We consider a new type of the corresponding
scenario when one of two particles ("critical") remains at rest near the
horizon of the cha... | [
{
"created": "Thu, 2 Feb 2012 21:36:24 GMT",
"version": "v1"
},
{
"created": "Thu, 3 May 2012 08:11:31 GMT",
"version": "v2"
},
{
"created": "Sat, 19 May 2012 08:16:56 GMT",
"version": "v3"
}
] | 2015-06-04 | [
[
"Zaslavskii",
"O. B.",
""
]
] | The recently discovered so-called BSW effect consists in the unbound growth of the energy E_{c.m.} in the centre of mass frame of two colliding particles near the black hole horizon. We consider a new type of the corresponding scenario when one of two particles ("critical") remains at rest near the horizon of the charg... |
2401.00455 | Adam Pound | Jeremy Miller, Benjamin Leather, Adam Pound, and Niels Warburton | Worldtube puncture scheme for first- and second-order self-force
calculations in the Fourier domain | 40 pages, 10 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Second-order gravitational self-force theory has recently led to the
breakthrough calculation of "first post-adiabatic" (1PA) compact-binary
waveforms~[Phys. Rev. Lett. 130, 241402 (2023)]. The computations underlying
those waveforms depend on a method of solving the perturbative second-order
Einstein equation in the... | [
{
"created": "Sun, 31 Dec 2023 11:15:41 GMT",
"version": "v1"
}
] | 2024-01-02 | [
[
"Miller",
"Jeremy",
""
],
[
"Leather",
"Benjamin",
""
],
[
"Pound",
"Adam",
""
],
[
"Warburton",
"Niels",
""
]
] | Second-order gravitational self-force theory has recently led to the breakthrough calculation of "first post-adiabatic" (1PA) compact-binary waveforms~[Phys. Rev. Lett. 130, 241402 (2023)]. The computations underlying those waveforms depend on a method of solving the perturbative second-order Einstein equation in the F... |
0711.3822 | Theodore A. Jacobson | Ted Jacobson | Einstein-aether gravity: theory and observational constraints | 8 pages, for proceedings of 4th Meeting on CPT and Lorentz Symmetry
(CPT 07), Bloomington, Indiana, 8-11 Aug 2007 | null | 10.1142/9789812779519_0014 | null | gr-qc astro-ph hep-ph hep-th | null | Einstein-aether theory is general relativity coupled to a dynamical unit
timelike vector field. A brief review of current theoretical understanding and
observational constraints on the four coupling parameters of the theory is
given.
| [
{
"created": "Sat, 24 Nov 2007 06:49:09 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Jacobson",
"Ted",
""
]
] | Einstein-aether theory is general relativity coupled to a dynamical unit timelike vector field. A brief review of current theoretical understanding and observational constraints on the four coupling parameters of the theory is given. |
2104.01982 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | Neutron Stars in Scalar-tensor Gravity with Quartic Order Scalar
Potential | Revised version, references added, AoP accepted | null | 10.1016/j.aop.2022.168839 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we investigate the effects of a non-minimally coupled quartic
order scalar model on static neutron stars, with the non-minimal coupling in
the Jordan frame being of the form $f(\phi ) = 1 + \xi\phi^2$. Particularly we
derive the Einstein frame Tolman-Oppenheimer-Volkoff equations, and by
numerically inte... | [
{
"created": "Mon, 5 Apr 2021 16:16:49 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Mar 2022 00:34:10 GMT",
"version": "v2"
}
] | 2022-04-13 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | In this work we investigate the effects of a non-minimally coupled quartic order scalar model on static neutron stars, with the non-minimal coupling in the Jordan frame being of the form $f(\phi ) = 1 + \xi\phi^2$. Particularly we derive the Einstein frame Tolman-Oppenheimer-Volkoff equations, and by numerically integr... |
2202.14024 | F Shojai | F. Shojai, A. Sadeghi and R. Hassannejad | Generalized Oppenheimer-Snyder Gravitational Collapse into Regular Black
holes | To appear in Class. Quant. Grav | null | 10.1088/1361-6382/ac5924 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We shall study the formation of a particular class of regular black holes
from the gravitational collapse of a massive star. The inside geometry is
described by spatially flat Friedmann-Robertson-Walker metric and the stellar
matter is distributed uniformly without any pre-assumption about its equation
of state. Our ... | [
{
"created": "Mon, 28 Feb 2022 18:46:53 GMT",
"version": "v1"
}
] | 2022-04-13 | [
[
"Shojai",
"F.",
""
],
[
"Sadeghi",
"A.",
""
],
[
"Hassannejad",
"R.",
""
]
] | We shall study the formation of a particular class of regular black holes from the gravitational collapse of a massive star. The inside geometry is described by spatially flat Friedmann-Robertson-Walker metric and the stellar matter is distributed uniformly without any pre-assumption about its equation of state. Our mo... |
1608.05941 | Mercedes Martin-Benito | Jer\'onimo Cortez, Beatriz Elizaga Navascu\'es, Mercedes
Mart\'in-Benito, Guillermo A. Mena Marug\'an and Jos\'e M. Velhinho | Uniqueness of the Fock quantization of Dirac fields in 2+1 dimensions | 24 pages. Document replaced to match published version | Phys. Rev. D 96, 025024 (2017) | 10.1103/PhysRevD.96.025024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Fock quantization of a free Dirac field in 2+1-dimensional
backgrounds which are conformally ultrastatic, with a time-dependent conformal
factor. As it is typical for field theories, there is an infinite ambiguity in
the Fock representation of the canonical anticommutation relations. Different
choices ma... | [
{
"created": "Sun, 21 Aug 2016 14:06:18 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Sep 2017 11:08:35 GMT",
"version": "v2"
}
] | 2017-09-06 | [
[
"Cortez",
"Jerónimo",
""
],
[
"Navascués",
"Beatriz Elizaga",
""
],
[
"Martín-Benito",
"Mercedes",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
],
[
"Velhinho",
"José M.",
""
]
] | We study the Fock quantization of a free Dirac field in 2+1-dimensional backgrounds which are conformally ultrastatic, with a time-dependent conformal factor. As it is typical for field theories, there is an infinite ambiguity in the Fock representation of the canonical anticommutation relations. Different choices may ... |
2201.10104 | LSC P&P Committee | The LIGO Scientific Collaboration, the Virgo Collaboration, and the
KAGRA Collaboration: R. Abbott, H. Abe, F. Acernese, K. Ackley, N. Adhikari,
R. X. Adhikari, V. K. Adkins, V. B. Adya, C. Affeldt, D. Agarwal, M. Agathos,
K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, T.
Akutsu, S. Albane... | Search for gravitational waves from Scorpius X-1 with a hidden Markov
model in O3 LIGO data | 23 pages, 5 figures | null | 10.1103/PhysRevD.106.062002 | LIGO-P2100405 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Results are presented for a semi-coherent search for continuous gravitational
waves from the low-mass X-ray binary Scorpius X-1, using a hidden Markov model
(HMM) to allow for spin wandering. This search improves on previous HMM-based
searches of Laser Interferometer Gravitational-wave Observatory (LIGO) data by
incl... | [
{
"created": "Tue, 25 Jan 2022 05:45:43 GMT",
"version": "v1"
}
] | 2023-02-01 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"the KAGRA Collaboration",
"",
""
],
[
"Abbott",
"R.",
""
],
[
"Abe",
"H.",
""
],
[
"Acernese",
"F.",
""
],
[
"Ackley",
"K... | Results are presented for a semi-coherent search for continuous gravitational waves from the low-mass X-ray binary Scorpius X-1, using a hidden Markov model (HMM) to allow for spin wandering. This search improves on previous HMM-based searches of Laser Interferometer Gravitational-wave Observatory (LIGO) data by includ... |
gr-qc/0101061 | Martin Bojowald | M. Bojowald and H. A. Kastrup | Symmetric States in Quantum Geometry | 9 pages, talk at the Ninth Marcel Grossmann Meeting, Rome, July 2-8,
2000 | null | 10.1142/9789812777386_0216 | null | gr-qc | null | Symmetric states are defined in the kinematical sector of loop quantum
gravity and applied to spherical symmetry and homogeneity. Consequences for the
physics of black holes and cosmology are discussed.
| [
{
"created": "Tue, 16 Jan 2001 16:45:39 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Bojowald",
"M.",
""
],
[
"Kastrup",
"H. A.",
""
]
] | Symmetric states are defined in the kinematical sector of loop quantum gravity and applied to spherical symmetry and homogeneity. Consequences for the physics of black holes and cosmology are discussed. |
2404.01970 | Ayan Banerjee | Takol Tangphati, Izzet Sakalli, Ayan Banerjee and Anirudh Pradhan | Anisotropic quark stars in $f(R,L_m,T)$ gravity | 11 pages, 7 figures, References updated | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the impact of $f(R,L_m,T)$ gravity on the internal structure
of compact stars, expecting this theory to manifest prominently in the
high-density cores of such stars. In this study, we begin by considering the
algebraic function $f(R,L_m,T) = R + \alpha T L_m$, where $\alpha$ represents
the matter-geome... | [
{
"created": "Tue, 2 Apr 2024 14:14:04 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Apr 2024 14:06:23 GMT",
"version": "v2"
}
] | 2024-04-11 | [
[
"Tangphati",
"Takol",
""
],
[
"Sakalli",
"Izzet",
""
],
[
"Banerjee",
"Ayan",
""
],
[
"Pradhan",
"Anirudh",
""
]
] | We investigate the impact of $f(R,L_m,T)$ gravity on the internal structure of compact stars, expecting this theory to manifest prominently in the high-density cores of such stars. In this study, we begin by considering the algebraic function $f(R,L_m,T) = R + \alpha T L_m$, where $\alpha$ represents the matter-geometr... |
1708.00441 | Omar Roldan | Omar Roldan | CMB in the river frame and gauge invariance at second order | 29 pages, 2 figures, references added, sec. 2.1 enhanced, appendix B
added, published in JCAP | JCAP 1803 (2018) no.03, 014 | 10.1088/1475-7516/2018/03/014 | null | gr-qc astro-ph.CO astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | GAUGE INVARIANCE: The Sachs-Wolfe formula describing the Cosmic Microwave
Background (CMB) temperature anisotropies is one of the most important
relations in cosmology. Despite its importance, the gauge invariance of this
formula has only been discussed at first order. Here we discuss the subtle
issue of second-order... | [
{
"created": "Tue, 1 Aug 2017 15:36:37 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Aug 2017 12:40:02 GMT",
"version": "v2"
},
{
"created": "Sun, 22 Apr 2018 02:06:16 GMT",
"version": "v3"
}
] | 2018-04-24 | [
[
"Roldan",
"Omar",
""
]
] | GAUGE INVARIANCE: The Sachs-Wolfe formula describing the Cosmic Microwave Background (CMB) temperature anisotropies is one of the most important relations in cosmology. Despite its importance, the gauge invariance of this formula has only been discussed at first order. Here we discuss the subtle issue of second-order g... |
2204.03259 | Mehrab Momennia | Mehrab Momennia | Quasinormal modes of self-dual black holes in loop quantum gravity | 15 pages, 6 captioned figures, and 16 tables. Comments are welcome;
V2: Minor changes to match published version, references added | Phys. Rev. D 106, 024052 (2022) | 10.1103/PhysRevD.106.024052 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the evolution of a test scalar field on the background geometry of a
regular loop quantum black hole (LQBH) characterized by two loop quantum
gravity (LQG) correction parameters, namely, the polymeric function and the
minimum area gap. The calculations of quasinormal frequencies in asymptotically
flat spacet... | [
{
"created": "Thu, 7 Apr 2022 07:12:06 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Aug 2022 23:23:12 GMT",
"version": "v2"
}
] | 2022-08-09 | [
[
"Momennia",
"Mehrab",
""
]
] | We study the evolution of a test scalar field on the background geometry of a regular loop quantum black hole (LQBH) characterized by two loop quantum gravity (LQG) correction parameters, namely, the polymeric function and the minimum area gap. The calculations of quasinormal frequencies in asymptotically flat spacetim... |
gr-qc/0512072 | Daniel R. Terno | Daniel R. Terno | Quantum information in loop quantum gravity | RevTex, 5 pages. Proceedings of QG'05, Cala Gonone, 2005 Relations of
the coarse-graining and partial tracing are clarified, and the references are
updated | J.Phys.Conf.Ser. 33 (2006) 469-474 | 10.1088/1742-6596/33/1/061 | null | gr-qc quant-ph | null | A coarse-graining of spin networks is expressed in terms of partial tracing,
thus allowing to use tools of quantum information theory. This is illustrated
by the analysis of a simple black hole model, where the logarithmic correction
of the Bekenstein-Hawking entropy is shown to be equal to the total amount of
correl... | [
{
"created": "Mon, 12 Dec 2005 22:35:37 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Mar 2006 15:32:25 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Terno",
"Daniel R.",
""
]
] | A coarse-graining of spin networks is expressed in terms of partial tracing, thus allowing to use tools of quantum information theory. This is illustrated by the analysis of a simple black hole model, where the logarithmic correction of the Bekenstein-Hawking entropy is shown to be equal to the total amount of correlat... |
1304.5411 | Diego S\'aez-G\'omez | Sergei D. Odintsov, Diego S\'aez-G\'omez | f(R, T, R_\mu\nu T^\mu\nu) gravity phenomenology and \Lambda CDM
universe | 12 pages. Analysis extended and minor corrections. Version published
in PLB | Phys. Lett. B 725 (2013) 437-444 | 10.1016/j.physletb.2013.07.026 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose general f(R,T,R_{\mu\nu}T^{\mu\nu}) theory as generalization of
covariant Horava-like gravity with dynamical Lorentz symmetry breaking. FRLW
cosmological dynamics for several versions of such theory is considered. The
reconstruction of the above action is explicitly done, including the numerical
reconstruc... | [
{
"created": "Fri, 19 Apr 2013 13:26:40 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jul 2013 14:58:07 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Sep 2013 14:46:08 GMT",
"version": "v3"
}
] | 2015-06-15 | [
[
"Odintsov",
"Sergei D.",
""
],
[
"Sáez-Gómez",
"Diego",
""
]
] | We propose general f(R,T,R_{\mu\nu}T^{\mu\nu}) theory as generalization of covariant Horava-like gravity with dynamical Lorentz symmetry breaking. FRLW cosmological dynamics for several versions of such theory is considered. The reconstruction of the above action is explicitly done, including the numerical reconstructi... |
gr-qc/9810032 | Ilya Shapiro | J.C. Fabris, A.M. Pelinson, I.L. Shapiro | Anomaly-induced effective action for gravity and inflation | LaTeX, 12 pages, 4 figures, Some mistakes and misprints in formulas
and Figures corrected | Grav.Cosmol. 6 (2000) 59-65 | null | DF/UFJF-5 | gr-qc hep-th | null | In the very early Universe the matter may be described by the free radiation,
that is by the set of massless fields with negligible interactions between
them. Then the dominating quantum effect is the trace anomaly which comes from
the renormalization of the conformal invariant part of the vacuum action. The
anomaly-... | [
{
"created": "Thu, 8 Oct 1998 21:26:15 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Oct 1998 14:19:30 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Fabris",
"J. C.",
""
],
[
"Pelinson",
"A. M.",
""
],
[
"Shapiro",
"I. L.",
""
]
] | In the very early Universe the matter may be described by the free radiation, that is by the set of massless fields with negligible interactions between them. Then the dominating quantum effect is the trace anomaly which comes from the renormalization of the conformal invariant part of the vacuum action. The anomaly-in... |
1302.1644 | Ali Reza Amani | Ali R. Amani, Celia Escamilla-Rivera and H. R. Faghani | Interacting closed string tachyon with modified Chaplygin gas and its
stability | 14 pages, 9 figures, Accepted by Phys.Rev.D | Phys. Rev. D 88, 124008 (2013) | 10.1103/PhysRevD.88.124008 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have considered closed string tachyon model with a constant
dilaton field and interacted it with Chaplygin gas for evaluating cosmology
parameters. The model has been studied in $26$-dimensional that its
$22$-dimensional is related to compactification on an internal non-flat space
and its other $4$-... | [
{
"created": "Thu, 7 Feb 2013 05:17:13 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Nov 2013 16:41:55 GMT",
"version": "v2"
}
] | 2013-12-16 | [
[
"Amani",
"Ali R.",
""
],
[
"Escamilla-Rivera",
"Celia",
""
],
[
"Faghani",
"H. R.",
""
]
] | In this paper, we have considered closed string tachyon model with a constant dilaton field and interacted it with Chaplygin gas for evaluating cosmology parameters. The model has been studied in $26$-dimensional that its $22$-dimensional is related to compactification on an internal non-flat space and its other $4$-di... |
0807.3077 | Joseph Katz | Donald Lynden-Bell, Jiri Bicak and Joseph Katz | Inertial frame rotation induced by rotating gravitational waves | Scheduled to appear in Class. and Quantum Grav. July 2008, "inertial"
added in title | Class. Quantum Grav. 25 (2008) 165018 | 10.1088/0264-9381/25/16/165018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the rotation of the inertial frames within an almost flat
cylindrical region surrounded by a pulse of non-axially-symmetric gravitational
waves that rotate about the axis of our cylindrical polar coordinates. Our
spacetime has only one Killing vector. It is along the z-axis and hypersurface
orthogonal. W... | [
{
"created": "Sat, 19 Jul 2008 10:11:35 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Aug 2008 06:41:01 GMT",
"version": "v2"
}
] | 2009-11-13 | [
[
"Lynden-Bell",
"Donald",
""
],
[
"Bicak",
"Jiri",
""
],
[
"Katz",
"Joseph",
""
]
] | We calculate the rotation of the inertial frames within an almost flat cylindrical region surrounded by a pulse of non-axially-symmetric gravitational waves that rotate about the axis of our cylindrical polar coordinates. Our spacetime has only one Killing vector. It is along the z-axis and hypersurface orthogonal. We ... |
gr-qc/9307027 | null | Antonio Campos and Enric Verdaguer | Semiclassical Equations for Weakly Inhomogeneous Cosmologies | 35 pages, UAB-FT 316, Latex (uses a4wide.sty, a4.sty included in the
file)(replaced due to tex problems) | Phys.Rev.D49:1861-1880,1994 | 10.1103/PhysRevD.49.1861 | null | gr-qc | null | The in-in effective action formalism is used to derive the semiclassical
correction to Einstein's equations due to a massless scalar quantum field
conformally coupled to small gravitational perturbations in spatially flat
cosmological models. The vacuum expectation value of the stress tensor of the
quantum field is d... | [
{
"created": "Wed, 21 Jul 1993 16:40:23 GMT",
"version": "v1"
}
] | 2009-07-10 | [
[
"Campos",
"Antonio",
""
],
[
"Verdaguer",
"Enric",
""
]
] | The in-in effective action formalism is used to derive the semiclassical correction to Einstein's equations due to a massless scalar quantum field conformally coupled to small gravitational perturbations in spatially flat cosmological models. The vacuum expectation value of the stress tensor of the quantum field is dir... |
gr-qc/9604046 | Sanjay Jhingan | Sanjay Jhingan, P. S. Joshi and T. P. Singh | The final fate of spherical inhomogeneous dust collapse II: Initial data
and causal structure of singularity | Latex file, uses epsf.sty, 15 pages and 3 eps figures. Paragraph on
role of smooth functions rewritten. Four references added. To appear in
Classical & Quantum Gravity | Class.Quant.Grav.13:3057-3068,1996 | 10.1088/0264-9381/13/11/019 | TIFR-TAP Preprint | gr-qc | null | Further to results in [9], pointing out the role of initial density and
velocity distributions towards determining the final outcome of spherical dust
collapse, the causal structure of singularity is examined here in terms of
evolution of the apparent horizon. We also bring out several related features
which throw so... | [
{
"created": "Wed, 24 Apr 1996 09:21:39 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Aug 1996 13:38:38 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Jhingan",
"Sanjay",
""
],
[
"Joshi",
"P. S.",
""
],
[
"Singh",
"T. P.",
""
]
] | Further to results in [9], pointing out the role of initial density and velocity distributions towards determining the final outcome of spherical dust collapse, the causal structure of singularity is examined here in terms of evolution of the apparent horizon. We also bring out several related features which throw some... |
2307.14616 | Jiliang Jing | Changkai Chen and Jiliang Jing | Radiation fluxes of gravitational, electromagnetic, and scalar
perturbations in type-D black holes: an exact approach | 23 pages, 5 figures, and 6 tables | JCAP 11 (2023) 070 | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present a novel method that solves Teukolsky equations with the source to
calculate radiation fluxes at infinity and event horizon for any perturbation
fields of type-D black holes. For the first time, we use the confluent Heun
function to obtain the exact solutions of ingoing and outgoing waves for the
Teukolsky ... | [
{
"created": "Thu, 27 Jul 2023 04:06:10 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Sep 2023 00:35:22 GMT",
"version": "v2"
}
] | 2024-03-13 | [
[
"Chen",
"Changkai",
""
],
[
"Jing",
"Jiliang",
""
]
] | We present a novel method that solves Teukolsky equations with the source to calculate radiation fluxes at infinity and event horizon for any perturbation fields of type-D black holes. For the first time, we use the confluent Heun function to obtain the exact solutions of ingoing and outgoing waves for the Teukolsky eq... |
2302.02920 | Nicolas Lecoeur | Eugeny Babichev, Christos Charmousis, Mokhtar Hassaine, Nicolas
Lecoeur | Conformally coupled scalar in Lovelock theory | null | null | 10.1103/PhysRevD.107.084050 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In arbitrary higher dimension, we consider the combination of Lovelock
gravity alongside a scalar-tensor action built out of higher order operators
and Euler densities. The latter action is constructed in such a way as to
ensure conformal invariance for the scalar field. For the combined version of
these theories, we... | [
{
"created": "Mon, 6 Feb 2023 16:50:57 GMT",
"version": "v1"
}
] | 2023-05-10 | [
[
"Babichev",
"Eugeny",
""
],
[
"Charmousis",
"Christos",
""
],
[
"Hassaine",
"Mokhtar",
""
],
[
"Lecoeur",
"Nicolas",
""
]
] | In arbitrary higher dimension, we consider the combination of Lovelock gravity alongside a scalar-tensor action built out of higher order operators and Euler densities. The latter action is constructed in such a way as to ensure conformal invariance for the scalar field. For the combined version of these theories, we s... |
1111.3327 | Arif Mohd | Luca Bombelli, Arif Mohd | Asymptotically anti de Sitter spacetimes in three dimensions | To be published in the proceedings of the XII Marcel Grossmann
meeting held in Paris in July 2009 | null | 10.1142/9789814374552_0151 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the asymptotically Anti de Sitter spacetimes in three dimensions.
Using the conformal-completion technique, we formulate the boundary conditions
in a covariant fashion and construct the global charges associated with the
asymptotic symmetries. The charges so constructed are conserved for the
asymptotic Kil... | [
{
"created": "Mon, 14 Nov 2011 19:09:49 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Bombelli",
"Luca",
""
],
[
"Mohd",
"Arif",
""
]
] | We revisit the asymptotically Anti de Sitter spacetimes in three dimensions. Using the conformal-completion technique, we formulate the boundary conditions in a covariant fashion and construct the global charges associated with the asymptotic symmetries. The charges so constructed are conserved for the asymptotic Killi... |
gr-qc/9711009 | Hideki Asada | Hideki Asada and Toshifumi Futamase | Propagation of gravitational waves from slow motion sources in a Coulomb
type potential | 13 pages, no figures, to be published in Phys. Rev. D | Phys.Rev.D56:6062-6066,1997 | 10.1103/PhysRevD.56.R6062 | YITP-97-43 | gr-qc | null | We consider the propagation of gravitational waves generated by slow motion
sources in Coulomb type potential due to the mass of the source. Then, the
formula for gravitational waveform including tail is obtained in a
straightforward manner by using the spherical Coulomb function. We discuss its
relation with the for... | [
{
"created": "Wed, 5 Nov 1997 02:27:50 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Asada",
"Hideki",
""
],
[
"Futamase",
"Toshifumi",
""
]
] | We consider the propagation of gravitational waves generated by slow motion sources in Coulomb type potential due to the mass of the source. Then, the formula for gravitational waveform including tail is obtained in a straightforward manner by using the spherical Coulomb function. We discuss its relation with the formu... |
2103.07179 | Karim Mosani | Karim Mosani, Dipanjan Dey, and Pankaj S. Joshi | Globally visible singularity in an astrophysical setup | 12 pages, 4 figures, 1 table | Monthly Notices of Royal Astronomical Society Volume 504 Issue 4
July 2021 Pages 4743 to 4750 | 10.1093/mnras/stab1186 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The global visibility of a singularity as an end state of the gravitational
collapse of a spherically symmetric pressureless cloud is investigated. We show
the existence of a non-zero measured set of parameters: the total mass and the
initial mean density of the collapsing cloud, giving rise to a physically
strong gl... | [
{
"created": "Fri, 12 Mar 2021 09:57:14 GMT",
"version": "v1"
}
] | 2022-11-15 | [
[
"Mosani",
"Karim",
""
],
[
"Dey",
"Dipanjan",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | The global visibility of a singularity as an end state of the gravitational collapse of a spherically symmetric pressureless cloud is investigated. We show the existence of a non-zero measured set of parameters: the total mass and the initial mean density of the collapsing cloud, giving rise to a physically strong glob... |
1703.03459 | Dieter Van den Bleeken | Dieter Van den Bleeken | Torsional Newton-Cartan gravity from the large $c$ expansion of General
Relativity | 25 pages, v3 footnote on Kerr corrected, ref added | null | 10.1088/1361-6382/aa83d4 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the manifestly covariant large $c$ expansion of General
Relativity, $c$ being the speed of light. Assuming the relativistic connection
has no pole in $c^{-2}$, this expansion is known to reproduce Newton-Cartan
gravity and a covariant version of Post-Newtonian corrections to it. We show
that relaxing this ... | [
{
"created": "Thu, 9 Mar 2017 20:56:04 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Sep 2017 10:15:59 GMT",
"version": "v2"
},
{
"created": "Wed, 27 Mar 2019 05:33:42 GMT",
"version": "v3"
}
] | 2019-03-28 | [
[
"Bleeken",
"Dieter Van den",
""
]
] | We revisit the manifestly covariant large $c$ expansion of General Relativity, $c$ being the speed of light. Assuming the relativistic connection has no pole in $c^{-2}$, this expansion is known to reproduce Newton-Cartan gravity and a covariant version of Post-Newtonian corrections to it. We show that relaxing this as... |
gr-qc/0511149 | Franz Hinterleitner | Roman Steigl, Franz Hinterleitner | Factor ordering in standard quantum cosmology | 15 pages, 3 figures | Class.Quant.Grav. 23 (2006) 3879-3894 | 10.1088/0264-9381/23/11/013 | null | gr-qc | null | The Wheeler-DeWitt equation of Friedmann models with a massless quantum field
is formulated with arbitrary factor ordering of the Hamiltonian constraint
operator. A scalar product of wave functions is constructed, giving rise to a
probability interpretation and making comparison with the classical solution
possible. ... | [
{
"created": "Tue, 29 Nov 2005 16:45:05 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Steigl",
"Roman",
""
],
[
"Hinterleitner",
"Franz",
""
]
] | The Wheeler-DeWitt equation of Friedmann models with a massless quantum field is formulated with arbitrary factor ordering of the Hamiltonian constraint operator. A scalar product of wave functions is constructed, giving rise to a probability interpretation and making comparison with the classical solution possible. In... |
1509.04878 | Andrea Geralico | Donato Bini, Eduardo Bittencourt, Andrea Geralico | Massless Dirac particles in the vacuum C-metric | 18 pages, 2 figures; accepted for publication in Classical and
Quantum Gravity | null | 10.1088/0264-9381/32/21/215010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the behavior of massless Dirac particles in the vacuum C-metric
spacetime, representing the nonlinear superposition of the Schwarzschild black
hole solution and the Rindler flat spacetime associated with uniformly
accelerated observers. Under certain conditions, the C-metric can be considered
as a unique lab... | [
{
"created": "Wed, 16 Sep 2015 10:46:26 GMT",
"version": "v1"
}
] | 2015-10-21 | [
[
"Bini",
"Donato",
""
],
[
"Bittencourt",
"Eduardo",
""
],
[
"Geralico",
"Andrea",
""
]
] | We study the behavior of massless Dirac particles in the vacuum C-metric spacetime, representing the nonlinear superposition of the Schwarzschild black hole solution and the Rindler flat spacetime associated with uniformly accelerated observers. Under certain conditions, the C-metric can be considered as a unique labor... |
2103.04865 | Masoud Ghezelbash | Masoud Ghezelbash, Haryanto M. Siahaan | Magnetized Kerr-Newman-Taub-NUT spacetimes | 38 pages, 17 figures, typos corrected, one appendix added | The European Physical Journal C 81, 621 (2021) | 10.1140/epjc/s10052-021-09430-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find a new class of exact solutions in the Einstein-Maxwell theory by
employing the Ernst magnetization process to the Kerr-Newman-Taub-NUT
spacetimes. We study the solutions and find that they are regular everywhere.
We also find the quasilocal conserved quantities for the spacetimes, the
corresponding Smarr form... | [
{
"created": "Mon, 8 Mar 2021 16:15:27 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Apr 2021 17:21:36 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Jul 2021 20:22:43 GMT",
"version": "v3"
}
] | 2021-08-10 | [
[
"Ghezelbash",
"Masoud",
""
],
[
"Siahaan",
"Haryanto M.",
""
]
] | We find a new class of exact solutions in the Einstein-Maxwell theory by employing the Ernst magnetization process to the Kerr-Newman-Taub-NUT spacetimes. We study the solutions and find that they are regular everywhere. We also find the quasilocal conserved quantities for the spacetimes, the corresponding Smarr formul... |
2306.11491 | Kostas Kleidis | Kostas Kleidis | Semiclassical Quadratic Gravity Revisited | 7 pages, Updated version of the presentation at the International
Workshop on Cosmology & Gravitational Physics, December 15 - 16, 2005,
Thessaloniki, Greece, N. K. Spyrou, N. Stergioulas and C. Tsagas (eds.).
arXiv admin note: text overlap with arXiv:hep-th/0209093 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The semiclassical interaction of the gravitational with a quantum scalar
field is considered, in view of the renormalizability of the associated
energy-momentum tensor in a n-dimensional curved spacetime resulting from a
quadratic gravitational lagrangian. It is shown that, in this case, a novel
coupling between the ... | [
{
"created": "Tue, 20 Jun 2023 12:23:08 GMT",
"version": "v1"
}
] | 2023-06-21 | [
[
"Kleidis",
"Kostas",
""
]
] | The semiclassical interaction of the gravitational with a quantum scalar field is considered, in view of the renormalizability of the associated energy-momentum tensor in a n-dimensional curved spacetime resulting from a quadratic gravitational lagrangian. It is shown that, in this case, a novel coupling between the sq... |
1812.11425 | Yasser Elmahalawy Mr | Alexander Andrianov, Yasser Elmahalawy and Artem Starodubtsev | 2+1-dimensional gravity coupled to a dust shell: quantization in terms
of global phase space variables | 19 pages, 3 figures, conference | null | 10.1134/S0040577919090022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform canonical analysis of a model in which gravity is coupled to a
spherically symmetric dust shell in 2+1 spacetime dimensions. The result is a
reduced action depending on a finite number of degrees of freedom. The emphasis
is made on finding canonical variables providing the global chart for the
entire phase... | [
{
"created": "Sat, 29 Dec 2018 19:06:50 GMT",
"version": "v1"
}
] | 2019-10-23 | [
[
"Andrianov",
"Alexander",
""
],
[
"Elmahalawy",
"Yasser",
""
],
[
"Starodubtsev",
"Artem",
""
]
] | We perform canonical analysis of a model in which gravity is coupled to a spherically symmetric dust shell in 2+1 spacetime dimensions. The result is a reduced action depending on a finite number of degrees of freedom. The emphasis is made on finding canonical variables providing the global chart for the entire phase s... |
2108.05861 | Marc Favata | Marc Favata, Chunglee Kim, K. G. Arun, JeongCho Kim, Hyung Won Lee | Constraining the orbital eccentricity of inspiralling compact binary
systems with Advanced LIGO | 31 pages, 11 figures, 4 tables; published in Phys. Rev. D. V2: minor
changes to match published version; some material moved to an appendix, minor
equation renumbering | Phys. Rev. D, 105, 023003 (2022) | 10.1103/PhysRevD.105.023003 | LIGO DCC P2100284 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of ~50 coalescing compact binaries with the Advanced LIGO and
Virgo detectors has allowed us to test general relativity, constrain merger
rates, and look for evidence of tidal effects, compact object spins, higher
waveform modes, and black hole ringdowns. An effect that has not yet been
confidently dete... | [
{
"created": "Thu, 12 Aug 2021 17:13:05 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Mar 2022 04:36:45 GMT",
"version": "v2"
}
] | 2022-03-15 | [
[
"Favata",
"Marc",
""
],
[
"Kim",
"Chunglee",
""
],
[
"Arun",
"K. G.",
""
],
[
"Kim",
"JeongCho",
""
],
[
"Lee",
"Hyung Won",
""
]
] | The detection of ~50 coalescing compact binaries with the Advanced LIGO and Virgo detectors has allowed us to test general relativity, constrain merger rates, and look for evidence of tidal effects, compact object spins, higher waveform modes, and black hole ringdowns. An effect that has not yet been confidently detect... |
gr-qc/9902076 | Alfredo Macias | Friedrich W. Hehl, Alfredo Macias (UAM-Iztapalapa) | Metric-affine gauge theory of gravity II. Exact solutions | Revtex file, 25 pages, final version to appear in IJMPD | Int.J.Mod.Phys. D8 (1999) 399-416 | 10.1142/S0218271899000316 | UAM-I: 9902026 | gr-qc | null | In continuing our series on metric-affine gravity (see Gronwald IJMP D6
(1997) 263 for Part I), we review the exact solutions in this theory.
| [
{
"created": "Tue, 23 Feb 1999 18:13:45 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Apr 1999 17:31:01 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Hehl",
"Friedrich W.",
"",
"UAM-Iztapalapa"
],
[
"Macias",
"Alfredo",
"",
"UAM-Iztapalapa"
]
] | In continuing our series on metric-affine gravity (see Gronwald IJMP D6 (1997) 263 for Part I), we review the exact solutions in this theory. |
2108.07607 | Edward Wilson-Ewing | Edward Wilson-Ewing | Potential consequences of wormhole-mediated entanglement | 8 pages. v2: References added | Found. Phys. 51, 87 (2021) | 10.1007/s10701-021-00489-y | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are hints that the connectivity of space-time in quantum gravity could
emerge from entanglement, and it has further been proposed that any two
entangled particles may be connected by a quantum wormhole. One way to test
this proposal is by probing the electric field of an entangled charged particle
to determine ... | [
{
"created": "Tue, 17 Aug 2021 13:10:50 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Aug 2021 16:17:26 GMT",
"version": "v2"
}
] | 2021-08-27 | [
[
"Wilson-Ewing",
"Edward",
""
]
] | There are hints that the connectivity of space-time in quantum gravity could emerge from entanglement, and it has further been proposed that any two entangled particles may be connected by a quantum wormhole. One way to test this proposal is by probing the electric field of an entangled charged particle to determine wh... |
1710.10463 | Ayan Banerjee | S. K. Maurya, Ayan Banerjee, Sudan Hansraj | Role of pressure anisotropy on relativistic compact stars | 11 pages, 4 figures; v2:, texts are improved and updated to match
journal version | Phys. Rev. D 97, 044022 (2018) | 10.1103/PhysRevD.97.044022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a compact spherically symmetric relativistic body with
anisotropic particle pressure profiles. The distribution possesses
characteristics relevant to modeling compact stars within the framework of
general relativity. For this purpose, we consider a spatial metric potential of
Korkina and Orlyanskii [Uk... | [
{
"created": "Sat, 28 Oct 2017 13:27:44 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Feb 2018 20:56:11 GMT",
"version": "v2"
}
] | 2018-02-28 | [
[
"Maurya",
"S. K.",
""
],
[
"Banerjee",
"Ayan",
""
],
[
"Hansraj",
"Sudan",
""
]
] | We investigate a compact spherically symmetric relativistic body with anisotropic particle pressure profiles. The distribution possesses characteristics relevant to modeling compact stars within the framework of general relativity. For this purpose, we consider a spatial metric potential of Korkina and Orlyanskii [Ukr.... |
1812.05704 | Kirill Bronnikov | K.A. Bronnikov, K.A. Baleevskikh | On gravitational lensing by symmetric and asymmetric wormholes | 6 pages, 5 figures | Grav. Cosmol. 25, 44-49 (2019) | 10.1134/S020228931901002X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the peculiarities of gravitational lensing by spherically
symmetric wormholes if they are not symmetric with respect to their throats. It
is noticed, in particular, that wormholes always contain the so-called photon
spheres, near which the photon deflection angles can be arbitrarily large, but,
in general,... | [
{
"created": "Thu, 13 Dec 2018 21:44:14 GMT",
"version": "v1"
}
] | 2020-10-20 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Baleevskikh",
"K. A.",
""
]
] | We discuss the peculiarities of gravitational lensing by spherically symmetric wormholes if they are not symmetric with respect to their throats. It is noticed, in particular, that wormholes always contain the so-called photon spheres, near which the photon deflection angles can be arbitrarily large, but, in general, t... |
1711.03824 | A. Emrah Y\"ukselci | A. Sava\c{s} Arapo\u{g}lu, A. Emrah Y\"ukselci | Dynamical System Analysis of Quintessence Models with Exponential
Potential -- Revisited | 15 pages, 3 figures; matches the published version | Modern Physics Letters A, Vol. 34, No. 09, 1950069 (2019) | 10.1142/S021773231950069X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamical system analysis of a universe model which contains matter,
radiation, and quintessence with exponential potential, $V \!(\phi)=V_{\!o} \,
exp(-\alpha \kappa \phi) \,$, is studied in the light of recent observations
and the tensions between different datasets. The three-dimensional phase space
is constructed... | [
{
"created": "Fri, 10 Nov 2017 14:04:25 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Feb 2020 13:44:02 GMT",
"version": "v2"
}
] | 2020-02-18 | [
[
"Arapoğlu",
"A. Savaş",
""
],
[
"Yükselci",
"A. Emrah",
""
]
] | Dynamical system analysis of a universe model which contains matter, radiation, and quintessence with exponential potential, $V \!(\phi)=V_{\!o} \, exp(-\alpha \kappa \phi) \,$, is studied in the light of recent observations and the tensions between different datasets. The three-dimensional phase space is constructed b... |
gr-qc/0208075 | Valerio Bozza | V. Bozza | Gravitational lensing in the strong field limit | 10 pages, 5 figures, in press on Physical Review D | Phys.Rev. D66 (2002) 103001 | 10.1103/PhysRevD.66.103001 | null | gr-qc astro-ph | null | We provide an analytic method to discriminate among different types of black
holes on the ground of their strong field gravitational lensing properties. We
expand the deflection angle of the photon in the neighbourhood of complete
capture, defining a strong field limit, in opposition to the standard weak
field limit.... | [
{
"created": "Mon, 26 Aug 2002 11:41:11 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Sep 2002 11:49:05 GMT",
"version": "v2"
},
{
"created": "Mon, 21 Oct 2002 09:14:57 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Bozza",
"V.",
""
]
] | We provide an analytic method to discriminate among different types of black holes on the ground of their strong field gravitational lensing properties. We expand the deflection angle of the photon in the neighbourhood of complete capture, defining a strong field limit, in opposition to the standard weak field limit. T... |
1611.03153 | Chikun Ding | Chikun Ding and Changqing Liu | Dispersion relation and surface gravity of universal horizons | 12 pages, accepted for publication in Sci China-Phys Mech Astron | Sci China-PMA 60 050411 (2017) | 10.1007/s11433-017-9012-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Einstein-aether theory, violating Lorentz invariance permits some
super-luminal communications, and the universal horizon can trap excitations
traveling at arbitrarily high velocities. To better understand the nature of
these universal horizons, we first modify the ray tracing method, and then use
it to study thei... | [
{
"created": "Thu, 10 Nov 2016 01:34:01 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Feb 2017 02:46:02 GMT",
"version": "v2"
}
] | 2017-03-28 | [
[
"Ding",
"Chikun",
""
],
[
"Liu",
"Changqing",
""
]
] | In Einstein-aether theory, violating Lorentz invariance permits some super-luminal communications, and the universal horizon can trap excitations traveling at arbitrarily high velocities. To better understand the nature of these universal horizons, we first modify the ray tracing method, and then use it to study their ... |
2207.10933 | Song Li | Song Li, Temurbek Mirzaev, Ahmadjon A. Abdujabbarov, Daniele
Malafarina, Bobomurat Ahmedov and Wen-Biao Han | Constraining the deformation of a black hole mimicker from the shadow | 15 pages, 7 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a black hole mimicker given by an exact solution of the
stationary and axially symmetric field equations in vacuum known as the
$\delta$-Kerr metric. We study its optical properties based on a ray-tracing
code for photon motion and characterize the apparent shape of the shadow of the
compact object and co... | [
{
"created": "Fri, 22 Jul 2022 08:15:10 GMT",
"version": "v1"
}
] | 2022-07-25 | [
[
"Li",
"Song",
""
],
[
"Mirzaev",
"Temurbek",
""
],
[
"Abdujabbarov",
"Ahmadjon A.",
""
],
[
"Malafarina",
"Daniele",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Han",
"Wen-Biao",
""
]
] | We consider a black hole mimicker given by an exact solution of the stationary and axially symmetric field equations in vacuum known as the $\delta$-Kerr metric. We study its optical properties based on a ray-tracing code for photon motion and characterize the apparent shape of the shadow of the compact object and comp... |
2301.02793 | Sung-Won Kim | Sung-Won Kim | Gravitational Waves by Perturbation of a Slowly Rotating Thin-Shell
Wormhole | 5 pages, 3 figures | Journal of the Korean Physical Society (2023) | 10.1007/s40042-022-00699-1 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | In this paper, the gravitational wave generation by a slowly rotating
thin-shell wormhole is considered. Since the rotating thin-shell wormhole is
assumed to be an axisymmetric rigid body, the rotation axis coincides with the
largest principal axis which means there is no precession motion. However, if
there is a per... | [
{
"created": "Sat, 7 Jan 2023 07:08:26 GMT",
"version": "v1"
}
] | 2023-01-10 | [
[
"Kim",
"Sung-Won",
""
]
] | In this paper, the gravitational wave generation by a slowly rotating thin-shell wormhole is considered. Since the rotating thin-shell wormhole is assumed to be an axisymmetric rigid body, the rotation axis coincides with the largest principal axis which means there is no precession motion. However, if there is a pertu... |
2005.13260 | Che-Yu Chen | Mariam Bouhmadi-L\'opez, Che-Yu Chen, Xiao Yan Chew, Yen Chin Ong,
Dong-han Yeom | Regular Black Hole Interior Spacetime Supported by Three-Form Field | 13 pages, 6 figures. Updated to match the published version | Eur. Phys. J. C (2021) 81:278 | 10.1140/epjc/s10052-021-09080-1 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we show that a minimally coupled 3-form endowed with a proper
potential can support a regular black hole interior. By choosing an appropriate
form for the metric function representing the radius of the 2-sphere, we solve
for the 3-form field and its potential. Using the obtained solution, we
construct ... | [
{
"created": "Wed, 27 May 2020 09:54:57 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Apr 2021 13:36:54 GMT",
"version": "v2"
}
] | 2021-04-06 | [
[
"Bouhmadi-López",
"Mariam",
""
],
[
"Chen",
"Che-Yu",
""
],
[
"Chew",
"Xiao Yan",
""
],
[
"Ong",
"Yen Chin",
""
],
[
"Yeom",
"Dong-han",
""
]
] | In this paper, we show that a minimally coupled 3-form endowed with a proper potential can support a regular black hole interior. By choosing an appropriate form for the metric function representing the radius of the 2-sphere, we solve for the 3-form field and its potential. Using the obtained solution, we construct an... |
1601.03946 | Mohsen Dehghani | Mohsen Dehghani | Group theoretical interpretation of the modified gravity in de Sitter
space | 20 pages | J. High Energy Phys. 03(2016)203 | 10.1007/JHEP03(2016)203 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A frame work has been presented for theoretical interpretation of various
modified gravitational models which is based on the group theoretical approach
and unitary irreducible representations (UIR's) of de Sitter (dS) group. In
order to illustrate the application of the proposed method, a model of modified
gravity h... | [
{
"created": "Thu, 14 Jan 2016 16:18:12 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Mar 2016 06:35:03 GMT",
"version": "v2"
}
] | 2016-05-30 | [
[
"Dehghani",
"Mohsen",
""
]
] | A frame work has been presented for theoretical interpretation of various modified gravitational models which is based on the group theoretical approach and unitary irreducible representations (UIR's) of de Sitter (dS) group. In order to illustrate the application of the proposed method, a model of modified gravity has... |
gr-qc/9711035 | Richard Easther | Richard Easther and Kei-ichi Maeda | Chaotic Dynamics and Two-Field Inflation | Latex2e, psfrag (3.03) and Level 2 postscript [Comments about
reheating expanded (v2), glitches in references fixed (v3)] | Class.Quant.Grav. 16 (1999) 1637-1652 | 10.1088/0264-9381/16/5/313 | BROWN-HET-1099, WU-AP/67/97 | gr-qc astro-ph hep-ph | null | We demonstrate the existence of chaos in realistic models of two-field
inflation. The chaotic motion takes place after the end of inflation, when the
fields are free to oscillate and their motion is only lightly damped by the
expansion of the universe. We then investigate whether the presence of chaos
affects the pre... | [
{
"created": "Tue, 11 Nov 1997 02:13:18 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Nov 1997 19:10:19 GMT",
"version": "v2"
},
{
"created": "Thu, 18 Dec 1997 23:43:48 GMT",
"version": "v3"
}
] | 2009-10-30 | [
[
"Easther",
"Richard",
""
],
[
"Maeda",
"Kei-ichi",
""
]
] | We demonstrate the existence of chaos in realistic models of two-field inflation. The chaotic motion takes place after the end of inflation, when the fields are free to oscillate and their motion is only lightly damped by the expansion of the universe. We then investigate whether the presence of chaos affects the predi... |
1810.04743 | Thomas M\"adler | Thomas M\"adler | Affine-null metric formulation of General Relativity at two intersecting
null hypersurfaces | 28 pages, matches (up to reference listing) published version | Phys. Rev. D 99, 104048 (2019) | 10.1103/PhysRevD.99.104048 | null | gr-qc astro-ph.HE astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit Winicour's affine-null metric initial value formulation of General
Relativity, where the characteristic initial value formulation is set up with a
null metric having two affine parameters. In comparison to past work, where the
application of the formulation was aimed for the timelike-null initial value
pro... | [
{
"created": "Wed, 10 Oct 2018 20:41:09 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Apr 2019 21:06:05 GMT",
"version": "v2"
},
{
"created": "Wed, 22 May 2019 18:29:38 GMT",
"version": "v3"
}
] | 2019-05-24 | [
[
"Mädler",
"Thomas",
""
]
] | We revisit Winicour's affine-null metric initial value formulation of General Relativity, where the characteristic initial value formulation is set up with a null metric having two affine parameters. In comparison to past work, where the application of the formulation was aimed for the timelike-null initial value probl... |
gr-qc/9903073 | R. Michael Jones | R. Michael Jones (CIRES, University of Colorado, Boulder, Colorado,
U.S.A.) | The classical action for a Bianchi VI_h model | Latex, 31 pages | null | null | null | gr-qc | null | An estimate for the classical action for a Bianchi VI_h homogeneous spatially
closed cosmology is presented as a function of b, a parameter of the model that
is proportional to the relative rotation of the average inertial frame and the
bulk of matter in the universe. It is assumed (through the equation of state)
tha... | [
{
"created": "Thu, 18 Mar 1999 22:37:50 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Jones",
"R. Michael",
"",
"CIRES, University of Colorado, Boulder, Colorado,\n U.S.A."
]
] | An estimate for the classical action for a Bianchi VI_h homogeneous spatially closed cosmology is presented as a function of b, a parameter of the model that is proportional to the relative rotation of the average inertial frame and the bulk of matter in the universe. It is assumed (through the equation of state) that ... |
gr-qc/9504032 | Thierry F. Kauffmann | Mark P. Haugan and Thierry F. Kauffmann | A New Test of the Einstein Equivalence Principle and the Isotropy of
Space | 21 pages, Latex, 3 Postscript figures | Phys.Rev.D52:3168-3175,1995 | 10.1103/PhysRevD.52.3168 | null | gr-qc | null | Recent research has established that nonsymmetric gravitation theories like
Moffat's NGT predict that a gravitational field singles out an orthogonal pair
of polarization states of light that propagate with different phase velocities.
We show that a much wider class of nonmetric theories encompassed by the $\chi
g$ f... | [
{
"created": "Thu, 20 Apr 1995 21:28:35 GMT",
"version": "v1"
}
] | 2010-11-30 | [
[
"Haugan",
"Mark P.",
""
],
[
"Kauffmann",
"Thierry F.",
""
]
] | Recent research has established that nonsymmetric gravitation theories like Moffat's NGT predict that a gravitational field singles out an orthogonal pair of polarization states of light that propagate with different phase velocities. We show that a much wider class of nonmetric theories encompassed by the $\chi g$ for... |
gr-qc/0610112 | Tao Mei | T. Mei | On isotropic metric of Schwarzschild solution of Einstein equation | 8 pages, no figure | null | null | null | gr-qc | null | The known static isotropic metric of Schwarzschild solution of Einstein
equation cannot cover with the range of r<2MG, a new isotropic metric of
Schwarzschild solution is obtained. The new isotropic metric has the
characters: (1) It is dynamic and periodic. (2) It has infinite singularities
of the spacetime. (3) It c... | [
{
"created": "Tue, 24 Oct 2006 07:53:03 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mei",
"T.",
""
]
] | The known static isotropic metric of Schwarzschild solution of Einstein equation cannot cover with the range of r<2MG, a new isotropic metric of Schwarzschild solution is obtained. The new isotropic metric has the characters: (1) It is dynamic and periodic. (2) It has infinite singularities of the spacetime. (3) It can... |
gr-qc/0205028 | Jose Francisco da Rocha Neto | J. F. da Rocha-Neto and K. H. Castello-Branco | Gravitational Energy of Kerr and Kerr Anti-de Sitter Space-times in the
Teleparallel Geometry | 11 pages, 1 figure, to appear in JHEP11(2003)002 | JHEP0311:002,2003 | 10.1088/1126-6708/2003/11/002 | null | gr-qc hep-th | null | In the context of the Hamiltonian formulation of the teleparallel equivalent
of general relativity we compute the gravitational energy of Kerr and Kerr
Anti-de Sitter (Kerr-AdS) space-times. The present calculation is carried out
by means of an expression for the energy of the gravitational field that
naturally arise... | [
{
"created": "Tue, 7 May 2002 22:46:02 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jun 2002 21:57:45 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Nov 2003 15:59:58 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"da Rocha-Neto",
"J. F.",
""
],
[
"Castello-Branco",
"K. H.",
""
]
] | In the context of the Hamiltonian formulation of the teleparallel equivalent of general relativity we compute the gravitational energy of Kerr and Kerr Anti-de Sitter (Kerr-AdS) space-times. The present calculation is carried out by means of an expression for the energy of the gravitational field that naturally arises ... |
1606.04654 | Cosimo Bambi | Yueying Ni, Menglei Zhou, Alejandro Cardenas-Avendano, Cosimo Bambi,
Carlos A.R. Herdeiro, Eugen Radu | Iron K$\alpha$ line of Kerr black holes with scalar hair | 1+18 pages, 9 figures. v2: refereed version | JCAP 1607:049,2016 | 10.1088/1475-7516/2016/07/049 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, a family of hairy black holes in 4-dimensional Einstein gravity
minimally coupled to a complex, massive scalar field was discovered~\cite{hbh}.
Besides the mass $M$ and spin angular momentum $J$, these objects are
characterized by a Noether charge $Q$, measuring the amount of scalar hair,
which is not assoc... | [
{
"created": "Wed, 15 Jun 2016 06:34:57 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jul 2016 15:18:52 GMT",
"version": "v2"
}
] | 2016-07-29 | [
[
"Ni",
"Yueying",
""
],
[
"Zhou",
"Menglei",
""
],
[
"Cardenas-Avendano",
"Alejandro",
""
],
[
"Bambi",
"Cosimo",
""
],
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Radu",
"Eugen",
""
]
] | Recently, a family of hairy black holes in 4-dimensional Einstein gravity minimally coupled to a complex, massive scalar field was discovered~\cite{hbh}. Besides the mass $M$ and spin angular momentum $J$, these objects are characterized by a Noether charge $Q$, measuring the amount of scalar hair, which is not associa... |
gr-qc/0610078 | Gamal Nashed G.L. | Gamal G.L. Nashed and Mohamed M. Mourad | Energy and Momentum of a Stationary Beam of Light in the New General
Relativity | 10 pages Latex | Nuovo Cim.B120:1307-1312,2005 | 10.1393/ncb/i2005-10169-1 | null | gr-qc | null | We give an exact solution to the gravitational field in the new general
relativity. The solution creates Bonnor spacetime. This spacetime describes the
gravitational field of a stationary beam of light. The energy and momentum of
this solution is calculated using the energy-momentum complex given by
M{\o}ller in (197... | [
{
"created": "Mon, 16 Oct 2006 09:54:54 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Nashed",
"Gamal G. L.",
""
],
[
"Mourad",
"Mohamed M.",
""
]
] | We give an exact solution to the gravitational field in the new general relativity. The solution creates Bonnor spacetime. This spacetime describes the gravitational field of a stationary beam of light. The energy and momentum of this solution is calculated using the energy-momentum complex given by M{\o}ller in (1978)... |
0903.3449 | Jose Ademir Sales Lima | M. A. S. Nobre, M. R. de Garcia Maia, J. C. Carvalho, J. A. S. Lima | Inhomogeneus Inflation and Cosmic no-Hair Conjecture | 8 pages, no figue | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmic no hair conjecture is tested for a large class of inhomogeneous
cosmologies with a positive cosmological constant. Firstly, we derive a new
class of exact inhomogeneous cosmological solutions whose matter content of the
models is formed by a mixture of two interacting simple fluids plus a
cosmological Lamb... | [
{
"created": "Fri, 20 Mar 2009 04:16:36 GMT",
"version": "v1"
}
] | 2009-03-23 | [
[
"Nobre",
"M. A. S.",
""
],
[
"Maia",
"M. R. de Garcia",
""
],
[
"Carvalho",
"J. C.",
""
],
[
"Lima",
"J. A. S.",
""
]
] | The cosmic no hair conjecture is tested for a large class of inhomogeneous cosmologies with a positive cosmological constant. Firstly, we derive a new class of exact inhomogeneous cosmological solutions whose matter content of the models is formed by a mixture of two interacting simple fluids plus a cosmological Lambda... |
1202.1818 | Joshua S. Schiffrin | Joshua S. Schiffrin and Robert M. Wald | Measure and Probability in Cosmology | 43 pages, 2 figures | Phys.Rev.D.86.023521,2012 | 10.1103/PhysRevD.86.023521 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativity has a Hamiltonian formulation, which formally provides a
canonical (Liouville) measure on the space of solutions. In ordinary
statistical physics, the Liouville measure is used to compute probabilities of
macrostates, and it would seem natural to use the similar measure arising in
general relativit... | [
{
"created": "Wed, 8 Feb 2012 20:56:57 GMT",
"version": "v1"
}
] | 2012-08-16 | [
[
"Schiffrin",
"Joshua S.",
""
],
[
"Wald",
"Robert M.",
""
]
] | General relativity has a Hamiltonian formulation, which formally provides a canonical (Liouville) measure on the space of solutions. In ordinary statistical physics, the Liouville measure is used to compute probabilities of macrostates, and it would seem natural to use the similar measure arising in general relativity ... |
gr-qc/0511080 | Aleksandar Mikovic | A. Mikovic | Spin Foam Models from the Tetrad Integration | 6 pages, based on the talk presented at the ERE05 meeting, September
6-10, 2005, Oviedo | AIP Conf.Proc.841:523-527,2006 | 10.1063/1.2218228 | null | gr-qc | null | We describe a class of spin foam models of four-dimensional quantum gravity
which is based on the integration of the tetrad one-forms in the path integral
for the Palatini action of General Relativity. In the Euclidian gravity case
this class of models can be understood as a modification of the Barrett-Crane
spin foa... | [
{
"created": "Tue, 15 Nov 2005 14:35:52 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Mikovic",
"A.",
""
]
] | We describe a class of spin foam models of four-dimensional quantum gravity which is based on the integration of the tetrad one-forms in the path integral for the Palatini action of General Relativity. In the Euclidian gravity case this class of models can be understood as a modification of the Barrett-Crane spin foam ... |
2012.10465 | Jakub Bilski | Jakub Bilski | Lie algebra of Ashtekar-Barbero connection operators | 4 pages | null | null | null | gr-qc hep-lat hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Holonomies of the Ashtekar-Barbero connection can be considered as abstract
elements of a Lie group exponentially mapped from their connections
representation. This idea provides a possibility to compare the geometric and
algebraic properties of these objects. The result allows to identify the
next-to-the-leading-ord... | [
{
"created": "Fri, 18 Dec 2020 19:00:41 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Feb 2021 18:07:05 GMT",
"version": "v2"
}
] | 2021-02-19 | [
[
"Bilski",
"Jakub",
""
]
] | Holonomies of the Ashtekar-Barbero connection can be considered as abstract elements of a Lie group exponentially mapped from their connections representation. This idea provides a possibility to compare the geometric and algebraic properties of these objects. The result allows to identify the next-to-the-leading-order... |
gr-qc/0607081 | Sean A. Hayward | Sean A. Hayward | Conservation laws for dynamical black holes | 4 revtex4 pages, 3 eps figures, various improvements in line with
longer article | null | null | null | gr-qc | null | An essentially complete new paradigm for dynamical black holes in terms of
trapping horizons is presented, including dynamical versions of the physical
quantities and laws which were considered important in the classical paradigm
for black holes in terms of Killing or event horizons. Three state functions
are identif... | [
{
"created": "Thu, 20 Jul 2006 17:39:14 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Sep 2006 11:16:45 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Hayward",
"Sean A.",
""
]
] | An essentially complete new paradigm for dynamical black holes in terms of trapping horizons is presented, including dynamical versions of the physical quantities and laws which were considered important in the classical paradigm for black holes in terms of Killing or event horizons. Three state functions are identifie... |
1911.04539 | Miguel Cruz | Miguel Cruz, Norman Cruz and Samuel Lepe | Unified dissipative dark matter model in a non linear Israel-Stewart
theory | New results were found and the core of the paper changed completely.
Now we contrast the fitting of the exact solution in the non linear approach
against LCDM model using supernovae type Ia data | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the Statefinder and $Om(x)$ diagnoses of an exact
solution of a unified dissipative dark matter model in the framework the
Israel-Stewart theory and its non linear extension, considering the condition
of positive entropy production. The implementation of two diagnoses in the pair
of solutions r... | [
{
"created": "Mon, 11 Nov 2019 19:47:20 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Sep 2021 03:34:11 GMT",
"version": "v2"
}
] | 2021-09-21 | [
[
"Cruz",
"Miguel",
""
],
[
"Cruz",
"Norman",
""
],
[
"Lepe",
"Samuel",
""
]
] | In this paper we study the Statefinder and $Om(x)$ diagnoses of an exact solution of a unified dissipative dark matter model in the framework the Israel-Stewart theory and its non linear extension, considering the condition of positive entropy production. The implementation of two diagnoses in the pair of solutions rev... |
1209.2917 | Farook Rahaman | Farook Rahaman, P. K. F. Kuhfittig, Saibal Ray and Safiqul Islam | Searching for higher dimensional wormholes with noncommutative geometry | 13 pages and 10 figures. A typos in the title has been corrected.
Published in Phys.Rev.D | Phys. Rev. D 86, 106010 (2012) | 10.1103/PhysRevD.86.106010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Noncommutative geometry, an offshoot of string theory, replaces point-like
structures with smeared objects and has recently been extended to higher
dimensions. The purpose of this letter is to obtain wormhole solutions with
this extended noncommutative geometry as a background. It is found through this
investigation ... | [
{
"created": "Wed, 12 Sep 2012 14:27:30 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Nov 2012 16:24:05 GMT",
"version": "v2"
},
{
"created": "Thu, 29 Nov 2012 13:10:02 GMT",
"version": "v3"
}
] | 2012-11-30 | [
[
"Rahaman",
"Farook",
""
],
[
"Kuhfittig",
"P. K. F.",
""
],
[
"Ray",
"Saibal",
""
],
[
"Islam",
"Safiqul",
""
]
] | Noncommutative geometry, an offshoot of string theory, replaces point-like structures with smeared objects and has recently been extended to higher dimensions. The purpose of this letter is to obtain wormhole solutions with this extended noncommutative geometry as a background. It is found through this investigation th... |
2209.15426 | Grigory Volovik | G.E. Volovik | Dimensionless physics: Planck constant as an element of Minkowski metric | 11 pages, no figures, version accepted in JETP Letters, arXiv admin
note: text overlap with arXiv:2207.05754 | null | 10.1134/S0021364022603013 | null | gr-qc cond-mat.other hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Diakonov theory of quantum gravity, in which tetrads emerge as the bilinear
combinations of the fermionis fields,\cite{Diakonov2011} suggests that in
general relativity the metric may have dimension 2, i.e.
$[g_{\mu\nu}]=1/[L]^2$. Several other approaches to quantum gravity, including
the model of superplastic vacuum... | [
{
"created": "Fri, 30 Sep 2022 17:40:56 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Oct 2022 17:42:20 GMT",
"version": "v2"
},
{
"created": "Sun, 27 Nov 2022 15:48:38 GMT",
"version": "v3"
},
{
"created": "Sun, 4 Dec 2022 15:01:09 GMT",
"version": "v4"
},
{
"cre... | 2023-02-15 | [
[
"Volovik",
"G. E.",
""
]
] | Diakonov theory of quantum gravity, in which tetrads emerge as the bilinear combinations of the fermionis fields,\cite{Diakonov2011} suggests that in general relativity the metric may have dimension 2, i.e. $[g_{\mu\nu}]=1/[L]^2$. Several other approaches to quantum gravity, including the model of superplastic vacuum a... |
2302.03367 | Andrea Geralico | D. Bini, A. Geralico, R. T. Jantzen | Wedging spacetime principal null directions | 24 pages, no figures | null | 10.1142/S0219887823501499 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Taking wedge products of the $p$ distinct principal null directions
associated with the eigen-bivectors of the Weyl tensor associated with the
Petrov classification, when linearly independent, one is able to express them
in terms of the eigenvalues governing this decomposition. We study here
algebraic and differentia... | [
{
"created": "Tue, 7 Feb 2023 10:20:13 GMT",
"version": "v1"
}
] | 2023-07-26 | [
[
"Bini",
"D.",
""
],
[
"Geralico",
"A.",
""
],
[
"Jantzen",
"R. T.",
""
]
] | Taking wedge products of the $p$ distinct principal null directions associated with the eigen-bivectors of the Weyl tensor associated with the Petrov classification, when linearly independent, one is able to express them in terms of the eigenvalues governing this decomposition. We study here algebraic and differential ... |
gr-qc/0009093 | E. Fabri | A. De Felice, E. Fabri | The Friedmann universe of dust by Regge Calculus: study of its ending
point | 5 figures (EPS) | null | null | null | gr-qc | null | We develop an evolution scheme, based on Sorkin algorithm, to evolve the most
complex regular tridimensional polytope, the 600-cell. This application has
been already studied before and all authors found a stop point for the
evolution of the spatial section. In our opinion a clear and satisfactory
meaning to this beh... | [
{
"created": "Wed, 27 Sep 2000 07:47:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"De Felice",
"A.",
""
],
[
"Fabri",
"E.",
""
]
] | We develop an evolution scheme, based on Sorkin algorithm, to evolve the most complex regular tridimensional polytope, the 600-cell. This application has been already studied before and all authors found a stop point for the evolution of the spatial section. In our opinion a clear and satisfactory meaning to this behav... |
0907.2339 | Trevor W. Marshall | Trevor W. Marshall | The gravitational collapse of a dust ball | 13 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the description of collapse given by the classic model of
Oppenheimer and Snyder fails to satisfy a crucial matching condition at the
surface of the ball. After correcting the model so that the interior and
exterior metrics match correctly, it is established that the contraction
process stops at the ... | [
{
"created": "Tue, 14 Jul 2009 12:36:57 GMT",
"version": "v1"
}
] | 2009-07-15 | [
[
"Marshall",
"Trevor W.",
""
]
] | It is shown that the description of collapse given by the classic model of Oppenheimer and Snyder fails to satisfy a crucial matching condition at the surface of the ball. After correcting the model so that the interior and exterior metrics match correctly, it is established that the contraction process stops at the Sc... |
gr-qc/9908078 | Masafumi Seriu | Masafumi Seriu | Space of spaces as a metric space | To appear in Communications in Mathematical Physics. 20 pages | Commun.Math.Phys. 209 (2000) 393-405 | 10.1007/s002200050025 | null | gr-qc | null | In spacetime physics, we frequently need to consider a set of all spaces
(`universes') as a whole. In particular, the concept of `closeness' between
spaces is essential. However, there has been no established mathematical theory
so far which deals with a space of spaces in a suitable manner for spacetime
physics.
B... | [
{
"created": "Tue, 31 Aug 1999 13:20:47 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Seriu",
"Masafumi",
""
]
] | In spacetime physics, we frequently need to consider a set of all spaces (`universes') as a whole. In particular, the concept of `closeness' between spaces is essential. However, there has been no established mathematical theory so far which deals with a space of spaces in a suitable manner for spacetime physics. Based... |
1310.3104 | Valentin Rudenko | A.V. Gusev, V.N. Rudenko, I.S Yudin | Low frequency signals of large scale GW-interferometers | 29 pages, 1 figure, submitted to Classical and Quantum Gravity | null | 10.1134/S1063776114100033 | null | gr-qc physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Application of the large scale gravitational wave interferometers for
measurement of geophysical signals at very low frequencies is considered.
Analysis is concentrated on the mechanism of penetration of quasistatic
geophysical perturbation through the main interferometer output. It is shown
that it has a parametrica... | [
{
"created": "Fri, 11 Oct 2013 12:30:07 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Gusev",
"A. V.",
""
],
[
"Rudenko",
"V. N.",
""
],
[
"Yudin",
"I. S",
""
]
] | Application of the large scale gravitational wave interferometers for measurement of geophysical signals at very low frequencies is considered. Analysis is concentrated on the mechanism of penetration of quasistatic geophysical perturbation through the main interferometer output. It is shown that it has a parametrical ... |
1401.2026 | Stefan Hollands | Stefan Hollands and Robert M. Wald | Quantum fields in curved spacetime | 77 pages, 5 figures, extended version of invited contribution to "100
Years of General Relativity" monograph series | null | 10.1016/j.physrep.2015.02.001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the theory of quantum fields propagating in an arbitrary,
classical, globally hyperbolic spacetime. Our review emphasizes the conceptual
issues arising in the formulation of the theory and presents known results in a
mathematically precise way. Particular attention is paid to the distributional
nature of qu... | [
{
"created": "Thu, 9 Jan 2014 15:15:29 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Jun 2014 07:56:57 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Hollands",
"Stefan",
""
],
[
"Wald",
"Robert M.",
""
]
] | We review the theory of quantum fields propagating in an arbitrary, classical, globally hyperbolic spacetime. Our review emphasizes the conceptual issues arising in the formulation of the theory and presents known results in a mathematically precise way. Particular attention is paid to the distributional nature of quan... |
0909.2436 | Edward Anderson | Edward Anderson and Anne Franzen | Quantum Cosmological Metroland Model | null | Class.Quant.Grav.27:045009,2010 | 10.1088/0264-9381/27/4/045009 | ITP-UU_09/36, SPIN-09/33 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Relational particle mechanics is useful for modelling whole-universe issues
such as quantum cosmology or the problem of time in quantum gravity, including
some aspects outside the reach of comparably complex minisuperspace models. In
this article, we consider the mechanics of pure shape and not scale of 4
particles o... | [
{
"created": "Mon, 14 Sep 2009 10:06:22 GMT",
"version": "v1"
}
] | 2010-03-25 | [
[
"Anderson",
"Edward",
""
],
[
"Franzen",
"Anne",
""
]
] | Relational particle mechanics is useful for modelling whole-universe issues such as quantum cosmology or the problem of time in quantum gravity, including some aspects outside the reach of comparably complex minisuperspace models. In this article, we consider the mechanics of pure shape and not scale of 4 particles on ... |
2307.06813 | Antonio Vicente-Becerril | Ana Alonso-Serrano, Guillermo A. Mena Marugan and Antonio
Vicente-Becerril | Analytic Primordial Power Spectrum in the Dressed Metric Approach to
Loop Quantum Cosmology and Thermodynamics of Spacetime | 19 pages, 8 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the primordial power spectrum of cosmological tensor
perturbations in the dressed metric approach to Loop Quantum Cosmology. We
compute the background-dependent effective mass that affects their propagation
using the effective description of Loop Quantum Cosmology and show that this
mass can be approxi... | [
{
"created": "Thu, 13 Jul 2023 15:27:01 GMT",
"version": "v1"
},
{
"created": "Sat, 27 Jul 2024 14:29:58 GMT",
"version": "v2"
}
] | 2024-07-30 | [
[
"Alonso-Serrano",
"Ana",
""
],
[
"Marugan",
"Guillermo A. Mena",
""
],
[
"Vicente-Becerril",
"Antonio",
""
]
] | We investigate the primordial power spectrum of cosmological tensor perturbations in the dressed metric approach to Loop Quantum Cosmology. We compute the background-dependent effective mass that affects their propagation using the effective description of Loop Quantum Cosmology and show that this mass can be approxima... |
gr-qc/0612132 | Giovanni Venturi | G. Venturi | Broken Scale Invariance and Quintessence (a quarter of a century ago) | 3 pages, contribution to the proceedings of MG11, Berlin, 23-29 July,
2006 | null | null | null | gr-qc astro-ph hep-th | null | The cosmological consequences of a simple scalar field model for the
generation of Newton's constant through the spontaneous breaking of scale
invariance in a curved space-time are again presented and discussed. Such a
model leads to a consistent description wherein the introduction of matter
introduces a small pertu... | [
{
"created": "Thu, 21 Dec 2006 11:06:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Venturi",
"G.",
""
]
] | The cosmological consequences of a simple scalar field model for the generation of Newton's constant through the spontaneous breaking of scale invariance in a curved space-time are again presented and discussed. Such a model leads to a consistent description wherein the introduction of matter introduces a small perturb... |
1703.05574 | Yoshimasa Kurihara | Yoshimasa Kurihara | Nakanishi-Kugo-Ojima quantization of general relativity in Heisenberg
picture | 28 pages, 0 figure | The European Physical Journal Plus volume 136, Article number: 462
(2021) | 10.1140/epjp/s13360-021-01463-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Chern-Weil topological theory is applied to a classical formulation of
general relativity in four-dimensional spacetime. Einstein--Hilbert
gravitational action is shown to be invariant with respect to a novel
translation (co-translation) operator up to the total derivative; thus, a
topological invariant of a seco... | [
{
"created": "Mon, 6 Mar 2017 20:38:03 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Mar 2021 06:40:12 GMT",
"version": "v10"
},
{
"created": "Sun, 16 Apr 2017 06:31:17 GMT",
"version": "v2"
},
{
"created": "Mon, 1 May 2017 01:51:33 GMT",
"version": "v3"
},
{
"cr... | 2021-05-26 | [
[
"Kurihara",
"Yoshimasa",
""
]
] | The Chern-Weil topological theory is applied to a classical formulation of general relativity in four-dimensional spacetime. Einstein--Hilbert gravitational action is shown to be invariant with respect to a novel translation (co-translation) operator up to the total derivative; thus, a topological invariant of a second... |
gr-qc/0305067 | John Klauder | John R. Klauder | Affine Quantum Gravity | latex, 6 pages, no figures | Int.J.Mod.Phys. D12 (2003) 1769-1774 | 10.1142/S0218271803003967 | null | gr-qc | null | A sketch of the affine quantum gravity program illustrates a different
perspective on several difficult issues of principle: metric positivity;
quantum anomalies; and nonrenormalizability.
| [
{
"created": "Sat, 17 May 2003 23:05:00 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Klauder",
"John R.",
""
]
] | A sketch of the affine quantum gravity program illustrates a different perspective on several difficult issues of principle: metric positivity; quantum anomalies; and nonrenormalizability. |
1903.04023 | Dirk Puetzfeld | Dirk Puetzfeld, Yuri N. Obukhov, Friedrich W. Hehl | Constitutive law of nonlocal gravity | 7 pages | Phys. Rev. D 99, 104013 (2019) | 10.1103/PhysRevD.99.104013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the structure of a recent nonlocal generalization of Einstein's
theory of gravitation by Mashhoon et al. By means of a covariant technique, we
derive an expanded version of the nonlocality tensor which constitutes the
theory. At the lowest orders of approximation, this leads to a simplification
which sheds... | [
{
"created": "Sun, 10 Mar 2019 17:03:28 GMT",
"version": "v1"
},
{
"created": "Thu, 9 May 2019 12:57:21 GMT",
"version": "v2"
}
] | 2019-05-10 | [
[
"Puetzfeld",
"Dirk",
""
],
[
"Obukhov",
"Yuri N.",
""
],
[
"Hehl",
"Friedrich W.",
""
]
] | We analyze the structure of a recent nonlocal generalization of Einstein's theory of gravitation by Mashhoon et al. By means of a covariant technique, we derive an expanded version of the nonlocality tensor which constitutes the theory. At the lowest orders of approximation, this leads to a simplification which sheds l... |
1002.4651 | Gil Jannes | C. Barcelo, L.J. Garay, G. Jannes | Quantum Non-Gravity and Stellar Collapse | 6 pages, 2 figures. v2: Partially restructured; potentially
observable consequence added. Several clarifications + 3 new references. To
appear in Found. of Phys | Found.Phys.41:1532-1541,2011 | 10.1007/s10701-011-9577-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observational indications combined with analyses of analogue and emergent
gravity in condensed matter systems support the possibility that there might be
two distinct energy scales related to quantum gravity: the scale that sets the
onset of quantum gravitational effects $E_B$ (related to the Planck scale) and
the mu... | [
{
"created": "Wed, 24 Feb 2010 23:24:50 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jun 2011 08:27:45 GMT",
"version": "v2"
}
] | 2011-08-01 | [
[
"Barcelo",
"C.",
""
],
[
"Garay",
"L. J.",
""
],
[
"Jannes",
"G.",
""
]
] | Observational indications combined with analyses of analogue and emergent gravity in condensed matter systems support the possibility that there might be two distinct energy scales related to quantum gravity: the scale that sets the onset of quantum gravitational effects $E_B$ (related to the Planck scale) and the much... |
gr-qc/0503119 | Keisuke Taniguchi | Masaru Shibata, Keisuke Taniguchi, and Koji Uryu | Merger of binary neutron stars with realistic equations of state in full
general relativity | Typos corrected, 2 references and comments on them added, 26 pages,
54 Postscript figures, Phys.Rev.D in press | Phys.Rev. D71 (2005) 084021 | 10.1103/PhysRevD.71.084021 | null | gr-qc astro-ph | null | We present numerical results of three-dimensional simulations for the merger
of binary neutron stars (BNSs) in full general relativity. Hybrid equations of
state (EOSs) are adopted to mimic realistic nuclear EOSs. In this approach, we
divide the EOSs into two parts, i.e., the thermal part and the cold part. For
the c... | [
{
"created": "Wed, 30 Mar 2005 16:54:13 GMT",
"version": "v1"
},
{
"created": "Sat, 9 Apr 2005 18:47:48 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Shibata",
"Masaru",
""
],
[
"Taniguchi",
"Keisuke",
""
],
[
"Uryu",
"Koji",
""
]
] | We present numerical results of three-dimensional simulations for the merger of binary neutron stars (BNSs) in full general relativity. Hybrid equations of state (EOSs) are adopted to mimic realistic nuclear EOSs. In this approach, we divide the EOSs into two parts, i.e., the thermal part and the cold part. For the col... |
1606.01262 | LVC Publications | The LIGO Scientific Collaboration and the Virgo Collaboration: B. P.
Abbott, R. Abbott, T. D. Abbott, M. R. Abernathy, F. Acernese, K. Ackley, C.
Adams, T. Adams, P. Addesso, R. X. Adhikari, V. B. Adya, C. Affeldt, M.
Agathos, K. Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith,
B. Allen, A. All... | Directly comparing GW150914 with numerical solutions of Einstein's
equations for binary black hole coalescence | 29 pages. Full version of tables available electronically with this
submission | Phys. Rev. D 94, 064035 (2016) | 10.1103/PhysRevD.94.064035 | LIGO P1500263 | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compare GW150914 directly to simulations of coalescing binary black holes
in full general relativity, accounting for all the spin-weighted quadrupolar
modes, and separately accounting for all the quadrupolar and octopolar modes.
Consistent with the posterior distributions reported in LVC_PE[1] (at 90%
confidence),... | [
{
"created": "Fri, 3 Jun 2016 20:13:19 GMT",
"version": "v1"
}
] | 2016-09-21 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""
],
[
"Abernathy",
"M. R.",
""
],
[
"Acernese",
"F... | We compare GW150914 directly to simulations of coalescing binary black holes in full general relativity, accounting for all the spin-weighted quadrupolar modes, and separately accounting for all the quadrupolar and octopolar modes. Consistent with the posterior distributions reported in LVC_PE[1] (at 90% confidence), w... |
gr-qc/0611139 | Ramin G. Daghigh | R. G. Daghigh, G. Kunstatter, and J. Ziprick | The Mystery of the Asymptotic Quasinormal Modes of Gauss-Bonnet Black
Holes | 12 pages and 5 figures | Class.Quant.Grav.24:1981-1992,2007 | 10.1088/0264-9381/24/8/005 | null | gr-qc | null | We analyze the quasinormal modes of $D$-dimensional Schwarzschild black holes
with the Gauss-Bonnet correction in the large damping limit and show that
standard analytic techniques cannot be applied in a straightforward manner to
the case of infinite damping. However, by using a combination of analytic and
numeric te... | [
{
"created": "Mon, 27 Nov 2006 00:04:51 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Daghigh",
"R. G.",
""
],
[
"Kunstatter",
"G.",
""
],
[
"Ziprick",
"J.",
""
]
] | We analyze the quasinormal modes of $D$-dimensional Schwarzschild black holes with the Gauss-Bonnet correction in the large damping limit and show that standard analytic techniques cannot be applied in a straightforward manner to the case of infinite damping. However, by using a combination of analytic and numeric tech... |
2002.08835 | Juan Rincon | Juan David Rincon-Estrada and David Bermudez | Instabilities in an optical black-hole laser | 14 pages, 12 figures, 42 references | null | 10.1002/andp.202000239 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hamiltonian of optical fields in a nonlinear dispersive fiber is studied.
Quantum field fluctuations are spontaneously created close to an optical event
horizon through the analog Hawking effect. The simplest model is considered for
an optical black-hole laser, where the Hawking radiation is produced and
amplifie... | [
{
"created": "Thu, 20 Feb 2020 16:19:16 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Nov 2020 13:43:18 GMT",
"version": "v2"
}
] | 2021-02-03 | [
[
"Rincon-Estrada",
"Juan David",
""
],
[
"Bermudez",
"David",
""
]
] | The Hamiltonian of optical fields in a nonlinear dispersive fiber is studied. Quantum field fluctuations are spontaneously created close to an optical event horizon through the analog Hawking effect. The simplest model is considered for an optical black-hole laser, where the Hawking radiation is produced and amplified ... |
2408.02717 | Piyali Bhar | Piyali Bhar | Properties of wormhole model in de Rham-Gabadadze-Tolley like massive
gravity with specific matter density | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the conventional method of studying wormhole (WH) geometry, traversability
requires the presence of exotic matter, which also provides negative gravity
effects to keep the wormhole throat open. In dRGT massive gravity theory, we
produce two types of WH solutions in our present paper. Selecting a static and
spheric... | [
{
"created": "Mon, 5 Aug 2024 16:40:41 GMT",
"version": "v1"
}
] | 2024-08-07 | [
[
"Bhar",
"Piyali",
""
]
] | In the conventional method of studying wormhole (WH) geometry, traversability requires the presence of exotic matter, which also provides negative gravity effects to keep the wormhole throat open. In dRGT massive gravity theory, we produce two types of WH solutions in our present paper. Selecting a static and spherical... |
gr-qc/9803073 | Joanne D. Cohn | J.D. Cohn and D.I. Kaiser | Where do all the supercurvature modes go? | 23 pages, 3 .eps figures included, uses prd,aps, epsfig style files
final version to appear in Phys Rev D, expanded concluding section | Phys.Rev. D58 (1998) 083515 | 10.1103/PhysRevD.58.083515 | UIUC-THC/98-2, HUTP-98/A010 | gr-qc astro-ph | null | In the hyperbolic slicing of de Sitter space appropriate for open universe
models, a curvature scale is present and supercurvature fluctuations are
possible. In some cases, the expansion of a scalar field in the Bunch-Davies
vacuum includes supercurvature modes, as shown by Sasaki, Tanaka and Yamamoto.
We express the... | [
{
"created": "Sat, 21 Mar 1998 21:05:17 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Jul 1998 19:29:21 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Cohn",
"J. D.",
""
],
[
"Kaiser",
"D. I.",
""
]
] | In the hyperbolic slicing of de Sitter space appropriate for open universe models, a curvature scale is present and supercurvature fluctuations are possible. In some cases, the expansion of a scalar field in the Bunch-Davies vacuum includes supercurvature modes, as shown by Sasaki, Tanaka and Yamamoto. We express the n... |
2312.11586 | Ioannis Contopoulos | Ioannis Contopoulos, Demosthenes Kazanas, Demetrios B. Papadopoulos | Gravitational Waves from the Pulsar Magnetosphere | 9 pages, 1 figure, accepted for publication in Monthly Notices | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/publicdomain/zero/1.0/ | We investigate the generation of gravitational waves from the rotation of an
orthogonal pulsar magnetosphere in flat space time. We calculate the first
order metric perturbation due to the rotation of the non-axisymmetric
distribution of electromagnetic energy density around the central star. We show
that gravitation... | [
{
"created": "Mon, 18 Dec 2023 14:29:33 GMT",
"version": "v1"
}
] | 2023-12-20 | [
[
"Contopoulos",
"Ioannis",
""
],
[
"Kazanas",
"Demosthenes",
""
],
[
"Papadopoulos",
"Demetrios B.",
""
]
] | We investigate the generation of gravitational waves from the rotation of an orthogonal pulsar magnetosphere in flat space time. We calculate the first order metric perturbation due to the rotation of the non-axisymmetric distribution of electromagnetic energy density around the central star. We show that gravitational... |
1002.2217 | Steven L. Liebling | Steven L. Liebling | Dynamics of Rotating, Magnetized Neutron Stars | 3 pages, 2 figures; Proceedings of the 12th Marcel Grossman Meeting,
Paris, July 12-18, 2009 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using a fully general relativistic implementation of ideal
magnetohydrodynamics with no assumed symmetries in three spatial dimensions,
the dynamics of magnetized, rigidly rotating neutron stars are studied.
Beginning with fully consistent initial data constructed with Magstar, part of
the Lorene project, we study th... | [
{
"created": "Wed, 10 Feb 2010 21:01:09 GMT",
"version": "v1"
}
] | 2010-02-12 | [
[
"Liebling",
"Steven L.",
""
]
] | Using a fully general relativistic implementation of ideal magnetohydrodynamics with no assumed symmetries in three spatial dimensions, the dynamics of magnetized, rigidly rotating neutron stars are studied. Beginning with fully consistent initial data constructed with Magstar, part of the Lorene project, we study the ... |
0706.2541 | Pablo Laguna | Frank Herrmann, Ian Hinder, Deirdre M. Shoemaker, Pablo Laguna and
Richard A. Matzner | Binary Black Holes: Spin Dynamics and Gravitational Recoil | 15 pages, 10 figures, replaced with version accepted for publication
in PRD | Phys.Rev.D76:084032,2007 | 10.1103/PhysRevD.76.084032 | null | gr-qc astro-ph | null | We present a study of spinning black hole binaries focusing on the spin
dynamics of the individual black holes as well as on the gravitational recoil
acquired by the black hole produced by the merger. We consider two series of
initial spin orientations away from the binary orbital plane. In one of the
series, the spi... | [
{
"created": "Mon, 18 Jun 2007 17:47:38 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Sep 2007 17:27:37 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Herrmann",
"Frank",
""
],
[
"Hinder",
"Ian",
""
],
[
"Shoemaker",
"Deirdre M.",
""
],
[
"Laguna",
"Pablo",
""
],
[
"Matzner",
"Richard A.",
""
]
] | We present a study of spinning black hole binaries focusing on the spin dynamics of the individual black holes as well as on the gravitational recoil acquired by the black hole produced by the merger. We consider two series of initial spin orientations away from the binary orbital plane. In one of the series, the spins... |
2002.01302 | Seyed Hossein Hendi Dr. | S. H. Hendi, A. M. Tavakkoli, S. Panahiyan, B. Eslam Panah, E.
Hackmann | Simulation of geodesic trajectory of charged BTZ black holes in massive
gravity | 26 pages with 15 captioned figures | null | 10.1140/epjc/s10052-020-8065-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to classify and understand the spacetime structure, investigation of
the geodesic motion of massive and massless particles is a key tool. So the
geodesic equation is a central equation of gravitating systems and the subject
of geodesics in the black hole dictionary attracted much attention. In this
paper, we... | [
{
"created": "Sat, 1 Feb 2020 20:44:00 GMT",
"version": "v1"
}
] | 2020-07-15 | [
[
"Hendi",
"S. H.",
""
],
[
"Tavakkoli",
"A. M.",
""
],
[
"Panahiyan",
"S.",
""
],
[
"Panah",
"B. Eslam",
""
],
[
"Hackmann",
"E.",
""
]
] | In order to classify and understand the spacetime structure, investigation of the geodesic motion of massive and massless particles is a key tool. So the geodesic equation is a central equation of gravitating systems and the subject of geodesics in the black hole dictionary attracted much attention. In this paper, we g... |
1708.09576 | Sijie Gao | Jincheng An and Sijie Gao | Five-dimensional Myers-Perry Black Holes as Particle Accelerators | 17 pages, no figure | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown that black holes could be used as particle accelerators to
create arbitrarily high center-of-mass (CM) energy if certain critical
conditions are satisfied. Most studies so far are confined in four-dimensional
spacetimes. In this paper, we present a systematic analysis on five-dimensional
Myers-Perry... | [
{
"created": "Thu, 31 Aug 2017 06:15:17 GMT",
"version": "v1"
}
] | 2017-09-01 | [
[
"An",
"Jincheng",
""
],
[
"Gao",
"Sijie",
""
]
] | It has been shown that black holes could be used as particle accelerators to create arbitrarily high center-of-mass (CM) energy if certain critical conditions are satisfied. Most studies so far are confined in four-dimensional spacetimes. In this paper, we present a systematic analysis on five-dimensional Myers-Perry b... |
1009.3572 | Farook Rahaman | F. Rahaman, K. K. Nandi, A. Bhadra, M. Kalam and K. Chakraborty | Perfect Fluid Dark Matter | 7 pages, 5 figures, To appear in Phys. Lett. B (2010) | Phys.Lett.B694:10-15,2010 | 10.1016/j.physletb.2010.09.038 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Taking the flat rotation curve as input and treating the matter content in
the galactic halo region as perfect fluid, we obtain space time metric at the
galactic halo region in the framework of general relativity. We find that the
resultant metric is a non-relativistic-dark-matter-induced space-time embedded
in a sta... | [
{
"created": "Sat, 18 Sep 2010 17:34:44 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Sep 2010 10:42:01 GMT",
"version": "v2"
}
] | 2010-11-26 | [
[
"Rahaman",
"F.",
""
],
[
"Nandi",
"K. K.",
""
],
[
"Bhadra",
"A.",
""
],
[
"Kalam",
"M.",
""
],
[
"Chakraborty",
"K.",
""
]
] | Taking the flat rotation curve as input and treating the matter content in the galactic halo region as perfect fluid, we obtain space time metric at the galactic halo region in the framework of general relativity. We find that the resultant metric is a non-relativistic-dark-matter-induced space-time embedded in a stati... |
1510.04457 | Uro\v{s} Kosti\'c | Uro\v{s} Kosti\'c, Martin Horvat, Andreja Gomboc | Relativistic Positioning System in Perturbed Space-time | 25 pages | Class. Quantum Grav. 32 (2015) 215004 | 10.1088/0264-9381/32/21/215004 | null | gr-qc physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a variant of a Global Navigation Satellite System called a
Relativistic Positioning System (RPS), which is based on emission coordinates.
We modelled the RPS dynamics in a space-time around Earth, described by a
perturbed Schwarzschild metric, where we included the perturbations due to
Earth multipoles (up... | [
{
"created": "Thu, 15 Oct 2015 09:35:25 GMT",
"version": "v1"
}
] | 2015-10-21 | [
[
"Kostić",
"Uroš",
""
],
[
"Horvat",
"Martin",
""
],
[
"Gomboc",
"Andreja",
""
]
] | We present a variant of a Global Navigation Satellite System called a Relativistic Positioning System (RPS), which is based on emission coordinates. We modelled the RPS dynamics in a space-time around Earth, described by a perturbed Schwarzschild metric, where we included the perturbations due to Earth multipoles (up t... |
gr-qc/0411135 | Nathalie Deruelle | Nathalie Deruelle and Yoshiyuki Morisawa | Mass and angular momenta of Kerr anti-de Sitter spacetimes in
Einstein-Gauss-Bonnet theory | null | Class.Quant.Grav. 22 (2005) 933-938 | 10.1088/0264-9381/22/6/002 | null | gr-qc hep-th | null | We compute the mass and angular momenta of rotating anti-de Sitter spacetimes
in Einstein-Gauss-Bonnet theory of gravity using a superpotential derived from
standard Noether identities. The calculation relies on the fact that the
Einstein and Einstein-Gauss-Bonnet vacuum equations are the same when
linearized on maxi... | [
{
"created": "Mon, 29 Nov 2004 07:19:24 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Deruelle",
"Nathalie",
""
],
[
"Morisawa",
"Yoshiyuki",
""
]
] | We compute the mass and angular momenta of rotating anti-de Sitter spacetimes in Einstein-Gauss-Bonnet theory of gravity using a superpotential derived from standard Noether identities. The calculation relies on the fact that the Einstein and Einstein-Gauss-Bonnet vacuum equations are the same when linearized on maxima... |
gr-qc/9512017 | Kiyoshi Ezawa | Kiyoshi Ezawa | A semiclassical interpretation of the topological solutions for
canonical quantum gravity | 30 pages Latex (one figure available as a postscript file) | Phys.Rev.D53:5651-5663,1996 | 10.1103/PhysRevD.53.5651 | OU-HET/231 | gr-qc | null | Ashtekar's formulation for canonical quantum gravity is known to possess the
topological solutions which have their supports only on the moduli space $\CN$
of flat $SL(2,C)$ connections. We show that each point on the moduli space
$\CN$ corresponds to a geometric structure, or more precisely the Lorentz group
part of... | [
{
"created": "Fri, 8 Dec 1995 11:04:23 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Ezawa",
"Kiyoshi",
""
]
] | Ashtekar's formulation for canonical quantum gravity is known to possess the topological solutions which have their supports only on the moduli space $\CN$ of flat $SL(2,C)$ connections. We show that each point on the moduli space $\CN$ corresponds to a geometric structure, or more precisely the Lorentz group part of a... |
1005.4169 | Soon-Tae Hong | Soon-Tae Hong, Sung-Won Kim | Hydrodynamics and global embeddings of Taub-NUT spacetime | 6 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | On Taub-NUT spacetime, we investigate hydrodynamic properties of perfect
fluid spiraling inward toward the spacetime along a conical surface. On the
equatorial plane of the Taub-NUT spacetime, we derive radial equations of
motion with effective potentials and the Euler equation for steady state
axisymmetric fluid. Hi... | [
{
"created": "Sun, 23 May 2010 04:42:32 GMT",
"version": "v1"
}
] | 2010-05-25 | [
[
"Hong",
"Soon-Tae",
""
],
[
"Kim",
"Sung-Won",
""
]
] | On Taub-NUT spacetime, we investigate hydrodynamic properties of perfect fluid spiraling inward toward the spacetime along a conical surface. On the equatorial plane of the Taub-NUT spacetime, we derive radial equations of motion with effective potentials and the Euler equation for steady state axisymmetric fluid. High... |
1306.0394 | Sourav Sur | Sourav Sur and Arshdeep Singh Bhatia | Constraining Torsion in Maximally symmetric (sub)spaces | 20 pages, No figures, 2 Tables | Class. Quant. Grav. 31 (2014) 025020 | 10.1088/0264-9381/31/2/025020 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We look into the general aspects of space-time symmetries in presence of
torsion, and how the latter is affected by such symmetries. Focusing in
particular to space-times which either exhibit maximal symmetry on their own,
or could be decomposed to maximally symmetric subspaces, we work out the
constraints on torsion... | [
{
"created": "Mon, 3 Jun 2013 13:14:21 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Aug 2017 09:04:08 GMT",
"version": "v2"
}
] | 2017-08-18 | [
[
"Sur",
"Sourav",
""
],
[
"Bhatia",
"Arshdeep Singh",
""
]
] | We look into the general aspects of space-time symmetries in presence of torsion, and how the latter is affected by such symmetries. Focusing in particular to space-times which either exhibit maximal symmetry on their own, or could be decomposed to maximally symmetric subspaces, we work out the constraints on torsion i... |
1807.07649 | Leandro A. Oliveira | Leandro A. Oliveira, Luis J. Garay, Lu\'is C. B. Crispino | Ergoregion instability of a rotating quantum system | 9 pages, 3 figures, 1 table | Physical Review D 97, 124063 (2018) | 10.1103/PhysRevD.97.124063 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the analogy between acoustic perturbations in an ideal fluid and the
description of a Klein-Gordon scalar field in a curved spacetime, we study the
quasinormal modes of a quantum system: the rotating Bose-Einstein condensate.
To compute quasinormal frequencies, we use two different numerical techniques,
namely ... | [
{
"created": "Thu, 19 Jul 2018 21:46:58 GMT",
"version": "v1"
}
] | 2018-07-23 | [
[
"Oliveira",
"Leandro A.",
""
],
[
"Garay",
"Luis J.",
""
],
[
"Crispino",
"Luís C. B.",
""
]
] | Using the analogy between acoustic perturbations in an ideal fluid and the description of a Klein-Gordon scalar field in a curved spacetime, we study the quasinormal modes of a quantum system: the rotating Bose-Einstein condensate. To compute quasinormal frequencies, we use two different numerical techniques, namely th... |
2204.00981 | Manuel D. Malaver | Manuel Malaver de la Fuente, Rajan Iyer, Alokananda Kar, Shouvik
Sadhukhan, Sudhaker Upadhyay and Ertan Gudekli | Buchdahl Spacetime with Compact Body Solution of Charged Fluid and
Scalar Field Theory | 21 pages, 22 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The present work contains a discussion on compact stellar body that is
influenced by the effects electromagnetic fields. We have tried to discuss a
solution of Einstein-Maxwell field equation with the interpretation of Buchdahl
spacetime type function. The interior fluid density and anisotropic pressures
have been de... | [
{
"created": "Sun, 3 Apr 2022 03:51:08 GMT",
"version": "v1"
}
] | 2022-04-05 | [
[
"de la Fuente",
"Manuel Malaver",
""
],
[
"Iyer",
"Rajan",
""
],
[
"Kar",
"Alokananda",
""
],
[
"Sadhukhan",
"Shouvik",
""
],
[
"Upadhyay",
"Sudhaker",
""
],
[
"Gudekli",
"Ertan",
""
]
] | The present work contains a discussion on compact stellar body that is influenced by the effects electromagnetic fields. We have tried to discuss a solution of Einstein-Maxwell field equation with the interpretation of Buchdahl spacetime type function. The interior fluid density and anisotropic pressures have been deri... |
1812.00728 | Sven Zschocke | Sven Zschocke | Light propagation in 2PN approximation in the field of one moving
monopole II. Boundary value problem | 68 pages, 4 figures | Classical and Quantum Gravity 36 (2019) 015007 | 10.1088/1361-6382/aaeb4c | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this investigation the boundary value problem of light propagation in the
gravitational field of one arbitrarily moving body with monopole structure is
considered in the second post-Newtonian approximation. The solution of the
boundary value problem comprises a set of altogether three transformations: k
-> sigma a... | [
{
"created": "Mon, 3 Dec 2018 13:36:45 GMT",
"version": "v1"
}
] | 2018-12-26 | [
[
"Zschocke",
"Sven",
""
]
] | In this investigation the boundary value problem of light propagation in the gravitational field of one arbitrarily moving body with monopole structure is considered in the second post-Newtonian approximation. The solution of the boundary value problem comprises a set of altogether three transformations: k -> sigma and... |
gr-qc/0303090 | Kouji Nakamura | Kouji Nakamura | Gauge Invariant Variables in Two-Parameter Nonlinear Perturbations | 33 pages, 1 figure, PTPTeX ver.0.8 (LateX2e), Accepted for
Publication to Progress of Theoretical Physics. Typos and trivial mistakes in
equations are corrected | Prog.Theor.Phys. 110 (2003) 723-755 | 10.1143/PTP.110.723 | NAOJ-TH-Ap 2003, No.19 | gr-qc astro-ph hep-ph hep-th math-ph math.MP | null | The procedure to find gauge invariant variables for two-parameter nonlinear
perturbations in general relativity is considered. For each order metric
perturbation, we define the variable which is defined by the appropriate
combination with lower order metric perturbations. Under the gauge
transformation, this variable... | [
{
"created": "Mon, 24 Mar 2003 07:51:46 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Jun 2003 14:34:00 GMT",
"version": "v2"
},
{
"created": "Mon, 28 Jul 2003 21:09:49 GMT",
"version": "v3"
},
{
"created": "Mon, 29 Sep 2003 08:12:47 GMT",
"version": "v4"
}
] | 2009-11-10 | [
[
"Nakamura",
"Kouji",
""
]
] | The procedure to find gauge invariant variables for two-parameter nonlinear perturbations in general relativity is considered. For each order metric perturbation, we define the variable which is defined by the appropriate combination with lower order metric perturbations. Under the gauge transformation, this variable i... |
1908.11058 | Matt Visser | Matt Visser (Victoria University of Wellington) | The Kiselev black hole is neither perfect fluid, nor is it quintessence | 12 pages | null | 10.1088/1361-6382/ab60b8 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Kiselev black hole spacetime, \[ ds^2 = - \left(1-{2m\over r} - {K\over
r^{1+3w}} \right) dt^2 + {dr^2\over1-{2m\over r} - {K\over r^{1+3w}}} + r^2
\,d\Omega_2^2, \] is an extremely popular toy model, with over 200 direct and
indirect citations as of 2019. Unfortunately, despite repeated assertions to
the contrar... | [
{
"created": "Thu, 29 Aug 2019 05:24:04 GMT",
"version": "v1"
}
] | 2020-01-29 | [
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | The Kiselev black hole spacetime, \[ ds^2 = - \left(1-{2m\over r} - {K\over r^{1+3w}} \right) dt^2 + {dr^2\over1-{2m\over r} - {K\over r^{1+3w}}} + r^2 \,d\Omega_2^2, \] is an extremely popular toy model, with over 200 direct and indirect citations as of 2019. Unfortunately, despite repeated assertions to the contrary,... |
gr-qc/0703087 | D. Bar | D. Bar | A possible quantum probability increase of the cylindrical gravitational
field | 58 pages, 3 composite PS Figures (composed of 8 panels). Some
corrections were added to the former version. Also clarifying sentences were
added and some equations were derived and explained | null | null | gr-qc/0703087 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As known, the cylindrical gravitational field (wave) have been canonically
quantized and its wave function, as the quantum one, interpreted in probability
terms. We show in this work, using quantum Zeno methods, that this probability
may be substantially increased and even approach unity. For that we first show,
in d... | [
{
"created": "Fri, 16 Mar 2007 17:39:18 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Mar 2007 14:46:50 GMT",
"version": "v2"
},
{
"created": "Fri, 7 Jan 2011 23:15:39 GMT",
"version": "v3"
}
] | 2011-01-11 | [
[
"Bar",
"D.",
""
]
] | As known, the cylindrical gravitational field (wave) have been canonically quantized and its wave function, as the quantum one, interpreted in probability terms. We show in this work, using quantum Zeno methods, that this probability may be substantially increased and even approach unity. For that we first show, in det... |
1204.6372 | Sergey Sushkov | Sergey Sushkov | Realistic cosmological scenario with non-minimal kinetic coupling | 11 pages, 10 figures, submitted to PRD | Phys.Rev. D85, 123520 (2012) | 10.1103/PhysRevD.85.123520 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate cosmological scenarios in the theory of gravity with the
scalar field possessing a non-minimal kinetic coupling to the curvature. It is
shown that the kinetic coupling provides an essentially new inflationary
mechanism. Namely, at early cosmological times the domination of coupling terms
in the field e... | [
{
"created": "Sat, 28 Apr 2012 06:38:52 GMT",
"version": "v1"
}
] | 2012-10-09 | [
[
"Sushkov",
"Sergey",
""
]
] | We investigate cosmological scenarios in the theory of gravity with the scalar field possessing a non-minimal kinetic coupling to the curvature. It is shown that the kinetic coupling provides an essentially new inflationary mechanism. Namely, at early cosmological times the domination of coupling terms in the field equ... |
2005.04130 | Daniela Pugliese Dr | D. Pugliese and H. Quevedo | Kerr metric bundles. Killing horizons confinement, light-surfaces and
horizons replicas | 44 pages; 29 figures; 1 table | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a complete characterization of the metric Killing bundles (or
metric bundles) of the Kerr geometry. Metric bundles, first introduced in [21]
can be generally defined for axially symmetric spacetimes with Killing horizons
and, for the case of Kerr geometries, are sets of black holes (BHs) or black
holes and... | [
{
"created": "Fri, 8 May 2020 16:15:17 GMT",
"version": "v1"
}
] | 2020-05-11 | [
[
"Pugliese",
"D.",
""
],
[
"Quevedo",
"H.",
""
]
] | We provide a complete characterization of the metric Killing bundles (or metric bundles) of the Kerr geometry. Metric bundles, first introduced in [21] can be generally defined for axially symmetric spacetimes with Killing horizons and, for the case of Kerr geometries, are sets of black holes (BHs) or black holes and n... |
gr-qc/0504111 | Jorge L. Cervantes-Cota | M. A. Rodriguez-Meza, Jorge L. Cervantes-Cota, M. I. Pedraza, J. F.
Tlapanco, and E. M. De la Calleja | Potential-density pairs for axisymmetric galaxies: the influence of
scalar fields | 8 pages, no figures, corrected version to the one that will appear in
Gen. Relativ. Gravit., where a small typo in eq. (13) is present | Gen.Rel.Grav.37:823-829,2005 | 10.1007/s10714-005-0067-2 | null | gr-qc astro-ph | null | We present a formulation for potential-density pairs to describe axisymmetric
galaxies in the Newtonian limit of scalar-tensor theories of gravity. The
scalar field is described by a modified Helmholtz equation with a source that
is coupled to the standard Poisson equation of Newtonian gravity. The net
gravitational ... | [
{
"created": "Fri, 22 Apr 2005 15:19:39 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Rodriguez-Meza",
"M. A.",
""
],
[
"Cervantes-Cota",
"Jorge L.",
""
],
[
"Pedraza",
"M. I.",
""
],
[
"Tlapanco",
"J. F.",
""
],
[
"De la Calleja",
"E. M.",
""
]
] | We present a formulation for potential-density pairs to describe axisymmetric galaxies in the Newtonian limit of scalar-tensor theories of gravity. The scalar field is described by a modified Helmholtz equation with a source that is coupled to the standard Poisson equation of Newtonian gravity. The net gravitational fo... |
gr-qc/0607008 | Carlos Barcelo | Carlos Barcelo, Stefano Liberati, Sebastiano Sonego, Matt Visser | Hawking-like radiation does not require a trapped region | revtex4, 4 pages, 1 figure | Phys.Rev.Lett. 97 (2006) 171301 | 10.1103/PhysRevLett.97.171301 | null | gr-qc | null | We discuss the issue of quasi-particle production by ``analogue black holes''
with particular attention to the possibility of reproducing Hawking radiation
in a laboratory. By constructing simple geometric acoustic models, we obtain a
somewhat unexpected result: We show that in order to obtain a stationary and
Planck... | [
{
"created": "Mon, 3 Jul 2006 12:00:50 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Barcelo",
"Carlos",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Sonego",
"Sebastiano",
""
],
[
"Visser",
"Matt",
""
]
] | We discuss the issue of quasi-particle production by ``analogue black holes'' with particular attention to the possibility of reproducing Hawking radiation in a laboratory. By constructing simple geometric acoustic models, we obtain a somewhat unexpected result: We show that in order to obtain a stationary and Planckia... |
gr-qc/9611017 | Shin'ji Mukouyama | Shinji Mukohyama | New Proof of the Generalized Second Law | 13 pages, Latex | Phys.Rev. D56 (1997) 2192-2201 | 10.1103/PhysRevD.56.2192 | YITP-96-38 | gr-qc | null | The generalized second law of black hole thermodynamics was proved by Frolov
and Page for a quasi-stationary eternal black hole. However, realistic black
holes arise from a gravitational collapse, and in this case their proof does
not hold. In this paper we prove the generalized second law for a
quasi-stationary blac... | [
{
"created": "Thu, 7 Nov 1996 08:45:39 GMT",
"version": "v1"
},
{
"created": "Sat, 28 Dec 1996 05:58:32 GMT",
"version": "v2"
},
{
"created": "Tue, 6 May 1997 10:03:46 GMT",
"version": "v3"
}
] | 2009-10-28 | [
[
"Mukohyama",
"Shinji",
""
]
] | The generalized second law of black hole thermodynamics was proved by Frolov and Page for a quasi-stationary eternal black hole. However, realistic black holes arise from a gravitational collapse, and in this case their proof does not hold. In this paper we prove the generalized second law for a quasi-stationary black ... |
2008.10600 | Sunil Maurya DR. | S. K. Maurya, Ksh. Newton Singh, M. Govender, Abdelghani Errehymy | Charged anisotropic strange stars in Brans-Dicke gravity with a massive
scalar field through embedding approach | 9 figures and 6 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this exposition, we seek solutions of the Einstein-Maxwell field equations
in the presence of a massive scalar field cast in the Brans-Dicke (BD)
formalism which describes charged anisotropic strange stars. The interior
spacetime is described by a spherically symmetric static metric of embedding
class I. This redu... | [
{
"created": "Sun, 23 Aug 2020 19:18:52 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Dec 2020 14:16:45 GMT",
"version": "v2"
}
] | 2020-12-08 | [
[
"Maurya",
"S. K.",
""
],
[
"Singh",
"Ksh. Newton",
""
],
[
"Govender",
"M.",
""
],
[
"Errehymy",
"Abdelghani",
""
]
] | In this exposition, we seek solutions of the Einstein-Maxwell field equations in the presence of a massive scalar field cast in the Brans-Dicke (BD) formalism which describes charged anisotropic strange stars. The interior spacetime is described by a spherically symmetric static metric of embedding class I. This reduce... |
2403.10606 | Swagat Saurav Mishra | Swagat S. Mishra | Cosmic Inflation: Background dynamics, Quantum fluctuations and
Reheating | 117 pages, 26 figures, preliminary version (based on a set of
supplementary lectures delivered for the PhD coursework at IUCAA), comments
and suggestions are welcome | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | These lecture notes provide a pedagogical introduction to some aspects of the
inflationary cosmology, including the background scalar field dynamics,
generation of primordial seed perturbations via quantum fluctuations during
inflation, and the process of reheating after inflation in the single-field
inflationary par... | [
{
"created": "Fri, 15 Mar 2024 18:00:59 GMT",
"version": "v1"
}
] | 2024-03-19 | [
[
"Mishra",
"Swagat S.",
""
]
] | These lecture notes provide a pedagogical introduction to some aspects of the inflationary cosmology, including the background scalar field dynamics, generation of primordial seed perturbations via quantum fluctuations during inflation, and the process of reheating after inflation in the single-field inflationary parad... |
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