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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9404044 | Henk van Elst | Henk van Elst, James E Lidsey & Reza Tavakol | Quantum Cosmology and Higher-Order Lagrangian Theories | 13 pages, LaTeX, preprint FERMILAB-Pub-94/XXX-A, March 1994 | Class.Quant.Grav.11:2483-2498,1994 | 10.1088/0264-9381/11/10/008 | null | gr-qc | null | In this paper the quantum cosmological consequences of introducing a term
cubic in the Ricci curvature scalar $R$ into the Einstein--Hilbert action are
investigated. It is argued that this term represents a more generic
perturbation to the action than the quadratic correction usually considered. A
qualitative argumen... | [
{
"created": "Mon, 25 Apr 1994 22:18:00 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"van Elst",
"Henk",
""
],
[
"Lidsey",
"James E",
""
],
[
"Tavakol",
"Reza",
""
]
] | In this paper the quantum cosmological consequences of introducing a term cubic in the Ricci curvature scalar $R$ into the Einstein--Hilbert action are investigated. It is argued that this term represents a more generic perturbation to the action than the quadratic correction usually considered. A qualitative argument ... |
1410.3148 | Antonio C. Guti\'errez-Pi\~neres | Antonio C. Guti\'errez-Pi\~neres | Conformastationary disk-haloes in Einstein-Maxwell gravity | null | General Relativity and Gravitation, April 2015, 47:54 | 10.1007/s10714-015-1898-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An exact solution of the Einstein-Maxwell field equations for a
conformastationary metric with magnetized disk-haloes sources is worked out in
full. The characterization of the nature of the energy momentum tensor of the
source is discussed. All the expressions are presented in terms of a solution
of the Laplace's eq... | [
{
"created": "Sun, 12 Oct 2014 20:55:49 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Oct 2014 14:24:18 GMT",
"version": "v2"
},
{
"created": "Fri, 31 Oct 2014 00:07:23 GMT",
"version": "v3"
},
{
"created": "Tue, 14 Apr 2015 20:05:20 GMT",
"version": "v4"
}
] | 2015-04-16 | [
[
"Gutiérrez-Piñeres",
"Antonio C.",
""
]
] | An exact solution of the Einstein-Maxwell field equations for a conformastationary metric with magnetized disk-haloes sources is worked out in full. The characterization of the nature of the energy momentum tensor of the source is discussed. All the expressions are presented in terms of a solution of the Laplace's equa... |
gr-qc/0508102 | Eugeniy Mikhailov | Eugeniy E. Mikhailov, Keisuke Goda, Thomas Corbitt, Nergis Mavalvala | Frequency-Dependent Squeeze Amplitude Attenuation and Squeeze Angle
Rotation by Electromagnetically Induced Transparency for Gravitational Wave
Interferometers | 4 pages | Phys.Rev. A73 (2006) 053810 | 10.1103/PhysRevA.73.053810 | null | gr-qc quant-ph | null | We study the effects of frequency-dependent squeeze amplitude attenuation and
squeeze angle rotation by electromagnetically induced transparency (EIT) on
gravitational wave (GW) interferometers. We propose the use of low-pass,
band-pass, and high-pass EIT filters, an S-shaped EIT filter, and an
intra-cavity EIT filte... | [
{
"created": "Thu, 25 Aug 2005 18:59:26 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Nov 2005 15:52:53 GMT",
"version": "v2"
},
{
"created": "Fri, 7 Apr 2006 02:00:45 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Mikhailov",
"Eugeniy E.",
""
],
[
"Goda",
"Keisuke",
""
],
[
"Corbitt",
"Thomas",
""
],
[
"Mavalvala",
"Nergis",
""
]
] | We study the effects of frequency-dependent squeeze amplitude attenuation and squeeze angle rotation by electromagnetically induced transparency (EIT) on gravitational wave (GW) interferometers. We propose the use of low-pass, band-pass, and high-pass EIT filters, an S-shaped EIT filter, and an intra-cavity EIT filter ... |
1705.11108 | Robert T Thompson | Robert T. Thompson and Mohsen Fathi | Covariant kinematics of light in media and a generalized Raychaudhuri
equation | 22 pages, 1 figure. This version has changes to conform with version
published in Phys Rev D | Phys. Rev. D 96, 105006 (2017) | 10.1103/PhysRevD.96.105006 | null | gr-qc physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is ongoing interest in adopting various tools and ideas from general
relativity for optical applications and the study of light propagation through
natural or engineered media. Here, the covariant kinematics of light
propagating through arbitrary dielectric media in curved space-times are
derived, allowing for ... | [
{
"created": "Wed, 31 May 2017 14:21:27 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Nov 2017 12:20:27 GMT",
"version": "v2"
}
] | 2017-11-15 | [
[
"Thompson",
"Robert T.",
""
],
[
"Fathi",
"Mohsen",
""
]
] | There is ongoing interest in adopting various tools and ideas from general relativity for optical applications and the study of light propagation through natural or engineered media. Here, the covariant kinematics of light propagating through arbitrary dielectric media in curved space-times are derived, allowing for an... |
1906.01352 | Bruce Allen | Bruce Allen | Spherical ansatz for parameter-space metrics | 8 pages, 2 figures, will be submitted to PRD | Phys. Rev. D 100, 124004 (2019) | 10.1103/PhysRevD.100.124004 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A fundamental quantity in signal analysis is the metric $g_{ab}$ on parameter
space, which quantifies the fractional "mismatch" $m$ between two (time- or
frequency-domain) waveforms. When searching for weak gravitational-wave or
electromagnetic signals from sources with unknown parameters $\lambda$ (masses,
sky locat... | [
{
"created": "Tue, 4 Jun 2019 11:34:18 GMT",
"version": "v1"
}
] | 2019-12-04 | [
[
"Allen",
"Bruce",
""
]
] | A fundamental quantity in signal analysis is the metric $g_{ab}$ on parameter space, which quantifies the fractional "mismatch" $m$ between two (time- or frequency-domain) waveforms. When searching for weak gravitational-wave or electromagnetic signals from sources with unknown parameters $\lambda$ (masses, sky locatio... |
gr-qc/0603058 | Christopher Eling | Christopher Eling and Ted Jacobson | Spherical Solutions in Einstein-Aether Theory: Static Aether and Stars | 27 pages, 6 figures; v2: minor editing, 1 new figure, references
added; v3: minor modification to abstract; v4: corrected overall sign in
twist formula and an error in equation for the aether stress tensor. Results
unchanged since correct form was used in calculations | Class.Quant.Grav.23:5625-5642,2006; Erratum-ibid.27:049801,2010 | 10.1088/0264-9381/23/18/008 10.1088/0264-9381/27/4/049801 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The time independent spherically symmetric solutions of General Relativity
(GR) coupled to a dynamical unit timelike vector are studied. We find there is
a three-parameter family of solutions with this symmetry. Imposing asymptotic
flatness restricts to two parameters, and requiring that the aether be aligned
with th... | [
{
"created": "Wed, 15 Mar 2006 01:31:15 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Aug 2006 19:26:01 GMT",
"version": "v2"
},
{
"created": "Mon, 14 Aug 2006 20:44:52 GMT",
"version": "v3"
},
{
"created": "Sun, 6 Dec 2009 14:44:26 GMT",
"version": "v4"
}
] | 2010-02-05 | [
[
"Eling",
"Christopher",
""
],
[
"Jacobson",
"Ted",
""
]
] | The time independent spherically symmetric solutions of General Relativity (GR) coupled to a dynamical unit timelike vector are studied. We find there is a three-parameter family of solutions with this symmetry. Imposing asymptotic flatness restricts to two parameters, and requiring that the aether be aligned with the ... |
1304.2916 | Sergiu I. Vacaru | Sergiu I. Vacaru | Cosmological Solutions in Biconnection and Bimetric Gravity Theories | latex ws-procs975x65 proceeding style, 3 pages, summary of a talk at
MG13 (Stockholm, 2012), section AT4 Modified Gravity | Proceedings MG13 Meeting on General Relativity (World Scientific,
2015), p 1276-1278 | 10.1142/9789814623995_0146 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show how generic off--diagonal cosmological solutions depending, in
general, on all spacetime coordinates can be constructed in massive gravity
using the anholonomic frame deformation method. Such metrics describe the late
time acceleration due to effective cosmological terms induced by nonlinear
off--diagonal int... | [
{
"created": "Tue, 2 Apr 2013 05:24:49 GMT",
"version": "v1"
}
] | 2015-02-23 | [
[
"Vacaru",
"Sergiu I.",
""
]
] | We show how generic off--diagonal cosmological solutions depending, in general, on all spacetime coordinates can be constructed in massive gravity using the anholonomic frame deformation method. Such metrics describe the late time acceleration due to effective cosmological terms induced by nonlinear off--diagonal inter... |
gr-qc/0110106 | Laszlo B. Szabados | Laszlo B Szabados | On the role of conformal three-geometries in the dynamics of General
Relativity | 15 pages, plain Tex | Class.Quant.Grav. 19 (2002) 2375-2392 | 10.1088/0264-9381/19/9/304 | null | gr-qc | null | It is shown that the Chern-Simons functional, built in the spinor
representation from the initial data on spacelike hypersurfaces, is invariant
with respect to infinitesimal conformal rescalings if and only if the vacuum
Einstein equations are satisfied. As a consequence, we show that in the phase
space the Hamiltoni... | [
{
"created": "Wed, 24 Oct 2001 15:10:49 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Szabados",
"Laszlo B",
""
]
] | It is shown that the Chern-Simons functional, built in the spinor representation from the initial data on spacelike hypersurfaces, is invariant with respect to infinitesimal conformal rescalings if and only if the vacuum Einstein equations are satisfied. As a consequence, we show that in the phase space the Hamiltonian... |
2006.09514 | Ben David Normann Mr. | Iver Brevik and Ben David Normann | Remarks on cosmological bulk viscosity in different epochs | (To appear in Symmetry), 17 pages | Symmetry 2020, 12(7), 1085 | 10.3390/sym12071085 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The intention of this paper is mainly two-fold. \textit{First}, we point out
a striking numerical agreement between the bulk viscosity in the lepton era
calculated by Husdal (2016) and our own calculations of the present-day bulk
viscosity when the functional form is $\zeta\,\sim\sqrt{\rho}$. From a
phenomenological ... | [
{
"created": "Tue, 16 Jun 2020 20:50:04 GMT",
"version": "v1"
}
] | 2020-07-08 | [
[
"Brevik",
"Iver",
""
],
[
"Normann",
"Ben David",
""
]
] | The intention of this paper is mainly two-fold. \textit{First}, we point out a striking numerical agreement between the bulk viscosity in the lepton era calculated by Husdal (2016) and our own calculations of the present-day bulk viscosity when the functional form is $\zeta\,\sim\sqrt{\rho}$. From a phenomenological po... |
0810.0634 | \.Ibrahim Semiz | Ibrahim Semiz | All "static" spherically symmetric perfect fluid solutions of Einstein's
equations with constant equation of state parameter and finite-polynomial
"mass function" | 24 standard LaTeX pages, 4 tables, no figures. -Title changed to
avoid equation in title. -The set of solutions and their interpretation
remains unchanged, but new classification of solutions (solution labels also
changed), consolidation of appendix into a table (omitting calculation
details) resulted in shorte... | Rev.Math.Phys.23:865-882,2011 | 10.1142/S0129055X1100445X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We look for "static" spherically symmetric solutions of Einstein's Equations
for perfect fluid source with equation of state $p=w\rho$. In order to include
the possibilities of recently popularized dark energy and phantom energy
possibly pervading the spacetime, we put no constraints on the constant $w$. We
consider ... | [
{
"created": "Fri, 3 Oct 2008 13:35:51 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Feb 2011 13:53:01 GMT",
"version": "v2"
}
] | 2011-10-03 | [
[
"Semiz",
"Ibrahim",
""
]
] | We look for "static" spherically symmetric solutions of Einstein's Equations for perfect fluid source with equation of state $p=w\rho$. In order to include the possibilities of recently popularized dark energy and phantom energy possibly pervading the spacetime, we put no constraints on the constant $w$. We consider al... |
2301.02263 | Fethi M. Ramazanoglu | Andrew Coates, Fethi M. Ramazano\u{g}lu | Pervasiveness of the breakdown of self-interacting vector field theories | 5 pages, 1 figure. Published version in PRD | Phys. Rev. D 107, 104036 (2023) | 10.1103/PhysRevD.107.104036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Various groups recently argued that self-interacting vector field theories
lack a well-defined time evolution when the field grows to large amplitudes,
which has drastic consequences for models in gravity and high energy theory.
Such field amplitudes can be a result of an external driving mechanism, or
occur intrinsi... | [
{
"created": "Thu, 5 Jan 2023 19:00:13 GMT",
"version": "v1"
},
{
"created": "Tue, 16 May 2023 05:09:21 GMT",
"version": "v2"
}
] | 2023-05-17 | [
[
"Coates",
"Andrew",
""
],
[
"Ramazanoğlu",
"Fethi M.",
""
]
] | Various groups recently argued that self-interacting vector field theories lack a well-defined time evolution when the field grows to large amplitudes, which has drastic consequences for models in gravity and high energy theory. Such field amplitudes can be a result of an external driving mechanism, or occur intrinsica... |
0706.0726 | Lawrence E. Kidder | Lawrence E. Kidder, Luc Blanchet, Bala R. Iyer | Radiation reaction in the 2.5PN waveform from inspiralling binaries in
circular orbits | 7 pages, no figures, submitted to CQG | Class.Quant.Grav.24:5307-5312,2007 | 10.1088/0264-9381/24/20/N01 | null | gr-qc | null | In this Comment we compute the contributions of the radiation reaction force
in the 2.5 post-Newtonian (PN) gravitational wave polarizations for compact
binaries in circular orbits. (i) We point out and correct an inconsistency in
the derivation of Arun, Blanchet, Iyer, and Qusailah. (ii) We prove that all
contributi... | [
{
"created": "Tue, 5 Jun 2007 19:48:53 GMT",
"version": "v1"
}
] | 2010-10-27 | [
[
"Kidder",
"Lawrence E.",
""
],
[
"Blanchet",
"Luc",
""
],
[
"Iyer",
"Bala R.",
""
]
] | In this Comment we compute the contributions of the radiation reaction force in the 2.5 post-Newtonian (PN) gravitational wave polarizations for compact binaries in circular orbits. (i) We point out and correct an inconsistency in the derivation of Arun, Blanchet, Iyer, and Qusailah. (ii) We prove that all contribution... |
2209.14959 | Tomi Koivisto | Tomi S. Koivisto | Integrable gravity with boundaries | 7 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Symmetric teleparallel gravity is shown to be integrable in the presence of
boundaries, given the consistent implementation of constraints in the covariant
phase space formalism.
| [
{
"created": "Thu, 29 Sep 2022 17:27:36 GMT",
"version": "v1"
}
] | 2022-09-30 | [
[
"Koivisto",
"Tomi S.",
""
]
] | Symmetric teleparallel gravity is shown to be integrable in the presence of boundaries, given the consistent implementation of constraints in the covariant phase space formalism. |
0712.2787 | Alberto Saa | Douglas Fregolente and Alberto Saa | Lifetime and decay of unstable particles in strong gravitational fields | 6 pages, 4 figures. Final version to appear in PRD | Phys.Rev.D77:103010,2008 | 10.1103/PhysRevD.77.103010 | null | gr-qc | null | We consider here the decay of unstable particles in geodesic circular motion
around compact objects. For the neutron, in particular, strong and weak decay
are calculated by means of a semiclassical approach. Noticeable effects are
expected to occur as one approaches the photonic circular orbit of realistic
black-hole... | [
{
"created": "Mon, 17 Dec 2007 17:58:32 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Apr 2008 01:14:21 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Fregolente",
"Douglas",
""
],
[
"Saa",
"Alberto",
""
]
] | We consider here the decay of unstable particles in geodesic circular motion around compact objects. For the neutron, in particular, strong and weak decay are calculated by means of a semiclassical approach. Noticeable effects are expected to occur as one approaches the photonic circular orbit of realistic black-holes.... |
2112.14978 | Roberto Chan | R. Chan, M. F. A. da Silva and V. H. Satheeshkumar | Thermodynamics of Einstein-Aether Black Holes | 35 pages, 5 figures and 4 tables. We have improved the manuscript
with a new solution and a comparison with others authors who have used
Eddington-Finkelstein coordinates | null | 10.1140/epjc/s10052-022-10912-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze several spherically symmetric exterior vacuum solutions allowed by
the Einstein-Aether (EA) theory with a non static aether and study the
thermodynamics of their Killing and universal horizons. We show that there are
five classes of solutions corresponding to different values of a combination of
the free p... | [
{
"created": "Thu, 30 Dec 2021 09:28:42 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Mar 2022 15:48:55 GMT",
"version": "v2"
},
{
"created": "Wed, 22 Jun 2022 08:12:05 GMT",
"version": "v3"
}
] | 2022-11-09 | [
[
"Chan",
"R.",
""
],
[
"da Silva",
"M. F. A.",
""
],
[
"Satheeshkumar",
"V. H.",
""
]
] | We analyze several spherically symmetric exterior vacuum solutions allowed by the Einstein-Aether (EA) theory with a non static aether and study the thermodynamics of their Killing and universal horizons. We show that there are five classes of solutions corresponding to different values of a combination of the free par... |
1612.08519 | Sunil Maharaj | D. Kileba Matondo, S. D. Maharaj | New charged anisotropic compact models | 21 pages, submitted for publication | Astrophys. Space Sci. 361, 221 (2016) | 10.1007/s10509-016-2812-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find new exact solutions to the Einstein-Maxwell field equations which are
relevant in the description of highly compact stellar objects. The relativistic
star is charged and anisotropic with a quark equation of state. Exact solutions
of the field equations are found in terms of elementary functions. It is
interes... | [
{
"created": "Tue, 27 Dec 2016 07:25:28 GMT",
"version": "v1"
}
] | 2017-01-04 | [
[
"Matondo",
"D. Kileba",
""
],
[
"Maharaj",
"S. D.",
""
]
] | We find new exact solutions to the Einstein-Maxwell field equations which are relevant in the description of highly compact stellar objects. The relativistic star is charged and anisotropic with a quark equation of state. Exact solutions of the field equations are found in terms of elementary functions. It is interesti... |
gr-qc/9506084 | Kip Thorne | Kip S. Thorne (Caltech) | Gravitational Waves from Compact Bodies | Latex; 31 pages, 8 figures. Figures are in eps files that are bundled
together in a tarred, compressed, and uuencoded form; figures are inserted
into text via a "special" command rather than psfig or epsf. Uses a style
file "crckapbk.sty" that is bundled with the figures | null | null | GRP-410 | gr-qc astro-ph | null | A review is given of recent research on gravitational waves from compact
bodies and its relevance to the LIGO/VIRGO international network of
high-frequency (10 to 10,000 Hz) gravitational-wave detectors, and to the
proposed LISA system of low-frequency (0.1 to 0.0001 Hz) detectors. The sources
that are reviewed are o... | [
{
"created": "Fri, 30 Jun 1995 20:04:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Thorne",
"Kip S.",
"",
"Caltech"
]
] | A review is given of recent research on gravitational waves from compact bodies and its relevance to the LIGO/VIRGO international network of high-frequency (10 to 10,000 Hz) gravitational-wave detectors, and to the proposed LISA system of low-frequency (0.1 to 0.0001 Hz) detectors. The sources that are reviewed are ord... |
1207.5714 | Farook Rahaman | I. Radinschi, F. Rahaman and U. F. Mondal | Energy Distribution for Non-commutative Radiating Schwarzschild Black
Holes | 5 pages and 6 figures. Revised version submitted in Int.J.Theor.Phys.
after minor revision | null | 10.1007/s10773-012-1304-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of this article is the calculation of the energy-momentum for a
non-commutative radiating Schwarzschild black hole in order to obtain the
expressions for energy. We make the calculations with the Einstein and M\oller
prescriptions. We show that the expressions for energy in both the
prescriptions depend on th... | [
{
"created": "Sun, 22 Jul 2012 14:14:43 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Radinschi",
"I.",
""
],
[
"Rahaman",
"F.",
""
],
[
"Mondal",
"U. F.",
""
]
] | The aim of this article is the calculation of the energy-momentum for a non-commutative radiating Schwarzschild black hole in order to obtain the expressions for energy. We make the calculations with the Einstein and M\oller prescriptions. We show that the expressions for energy in both the prescriptions depend on the ... |
1208.3237 | Luis P. Chimento | Luis P. Chimento and Diego Pav\'on | Inhomogeneous Exact Solutions with Varying Cosmological Term | 2 pages | Proceedings of the Spanish Relativity Meeting in Honour of the
65th Birthday of Lluis Bel, Salamanca, Spain, 22-25 September, 1998 (World
Scientific Publishers, 1999), p.301 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evolution of LTB Universe models possessing a varying
cosmological term and a material fluid.
| [
{
"created": "Wed, 15 Aug 2012 22:19:54 GMT",
"version": "v1"
}
] | 2012-08-17 | [
[
"Chimento",
"Luis P.",
""
],
[
"Pavón",
"Diego",
""
]
] | We study the evolution of LTB Universe models possessing a varying cosmological term and a material fluid. |
gr-qc/0607127 | Edwin J. Son | Wontae Kim, Edwin J. Son, Myung Seok Yoon | Remarks on the Wave Function of the Universe in the Dilaton Cosmology | 7 pages, to appear in J. Kor. Phys. Soc | J.Korean Phys.Soc. 49 (2006) 679-682 | null | null | gr-qc | null | Motivated by previous works, we study semi-classical cosmological solutions
and the wave function of the Wheeler-DeWitt equation in the Bose-Parker-Peleg
model. We obtain the wave function of the universe satisfying the suitable
boundary condition of the redefined fields, which has not been considered in
previous wor... | [
{
"created": "Thu, 27 Jul 2006 18:37:52 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kim",
"Wontae",
""
],
[
"Son",
"Edwin J.",
""
],
[
"Yoon",
"Myung Seok",
""
]
] | Motivated by previous works, we study semi-classical cosmological solutions and the wave function of the Wheeler-DeWitt equation in the Bose-Parker-Peleg model. We obtain the wave function of the universe satisfying the suitable boundary condition of the redefined fields, which has not been considered in previous works... |
2308.07909 | Shao-Jiang Wang | Shao-Jiang Wang | The doomsday of black hole evaporation | v1, 7 pages, 1 figure; v2, 9 pages, 1 figure, extended discussions
with more details, accepted for publication as a Letter in Europhysics
Letters; v3, to match the published version, selected as Editor's Choice | EPL 146 (2024) 39002 | 10.1209/0295-5075/ad3b36 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By assuming simultaneously the unitarity of the Hawking evaporation and the
universality of Bekenstein entropy bound as well as the validity of cosmic
censorship conjecture, we find that the black hole evaporation rate could
evolve from the usual inverse square law in black hole mass into a constant
evaporation rate ... | [
{
"created": "Tue, 15 Aug 2023 17:51:42 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Apr 2024 15:44:09 GMT",
"version": "v2"
},
{
"created": "Wed, 15 May 2024 01:30:02 GMT",
"version": "v3"
}
] | 2024-05-16 | [
[
"Wang",
"Shao-Jiang",
""
]
] | By assuming simultaneously the unitarity of the Hawking evaporation and the universality of Bekenstein entropy bound as well as the validity of cosmic censorship conjecture, we find that the black hole evaporation rate could evolve from the usual inverse square law in black hole mass into a constant evaporation rate ne... |
1411.6193 | Andrew Makarenko | Andrey N. Makarenko, Sergei D. Odintsov, Gonzalo J. Olmo and Diego
Rubiera-Garcia | Early-time cosmic dynamics in $f(R)$ and $f(|\hat\Omega|)$ extensions of
Born-Infeld gravity | based on the talk by S.D. Odintsov at QFTG2014, to appear in TSPU
Bulletin 12 (2014) 157 | TSPU Bulletin 12 (2014) 158 | null | IFIC/14-83 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider two types of modifications of Born-Infeld gravity in the Palatini
formulation and explore their dynamics in the early universe. One of these
families considers $f(R)$ corrections to the Born-Infeld Lagrangian, which can
be seen as modifications of the dynamics produced by the quantum effects of
matter, wh... | [
{
"created": "Sun, 23 Nov 2014 05:45:23 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Makarenko",
"Andrey N.",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Olmo",
"Gonzalo J.",
""
],
[
"Rubiera-Garcia",
"Diego",
""
]
] | We consider two types of modifications of Born-Infeld gravity in the Palatini formulation and explore their dynamics in the early universe. One of these families considers $f(R)$ corrections to the Born-Infeld Lagrangian, which can be seen as modifications of the dynamics produced by the quantum effects of matter, whil... |
gr-qc/0610090 | Jacek Jezierski | Jacek Jezierski, Maciej {\L}ukasik | Conformal Yano-Killing tensors for the Taub-NUT metric | 12 pages | Class.Quant.Grav.24:1331-1340,2007 | 10.1088/0264-9381/24/5/015 | null | gr-qc | null | Symmetric conformal Killing tensors and (skew-symmetric) conformal
Yano-Killing tensors for Euclidean Taub-NUT metric are given in explicit form.
Relations between Yano and CYK tensors in terms of conformal rescaling are
discussed.
| [
{
"created": "Wed, 18 Oct 2006 14:17:36 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Jezierski",
"Jacek",
""
],
[
"Łukasik",
"Maciej",
""
]
] | Symmetric conformal Killing tensors and (skew-symmetric) conformal Yano-Killing tensors for Euclidean Taub-NUT metric are given in explicit form. Relations between Yano and CYK tensors in terms of conformal rescaling are discussed. |
gr-qc/0410010 | Michael Heller | Leszek Pysiak, Michael Heller, Zdzislaw Odrzygozdz, Wieslaw Sasin | Observables in a Noncommutative Unification of Quanta and Gravity. A
Final Model | 20 pages. LaTex format | Gen.Rel.Grav. 37 (2005) 541-555 | 10.1007/s10714-005-0041-z | null | gr-qc | null | We further develop a noncommutative model unifying quantum mechanics and
general relativity proposed in {\it Gen. Rel. Grav.} (2004) {\bf 36}, 111-126.
Generalized symmetries of the model are defined by a groupoid $\Gamma $ given
by the action of a finite group on a space $E$. The geometry of the model is
constructed... | [
{
"created": "Sat, 2 Oct 2004 10:32:43 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Pysiak",
"Leszek",
""
],
[
"Heller",
"Michael",
""
],
[
"Odrzygozdz",
"Zdzislaw",
""
],
[
"Sasin",
"Wieslaw",
""
]
] | We further develop a noncommutative model unifying quantum mechanics and general relativity proposed in {\it Gen. Rel. Grav.} (2004) {\bf 36}, 111-126. Generalized symmetries of the model are defined by a groupoid $\Gamma $ given by the action of a finite group on a space $E$. The geometry of the model is constructed i... |
gr-qc/0301101 | Hans Ringstrom | Hans Ringstrom | Future asymptotic expansions of Bianchi VIII vacuum metrics | 50 pages, no figures. Erronous definition of Seifert fibred spaces
corrected | Class.Quant.Grav. 20 (2003) 1943-1990 | 10.1088/0264-9381/20/11/302 | AEI-2003-023 | gr-qc | null | Bianchi VIII vacuum solutions to Einstein's equations are causally
geodesically complete to the future, given an appropriate time orientation, and
the objective of this article is to analyze the asymptotic behaviour of
solutions in this time direction. For the Bianchi class A spacetimes, there is
a formulation of the... | [
{
"created": "Fri, 24 Jan 2003 14:06:16 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Mar 2003 13:42:08 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Ringstrom",
"Hans",
""
]
] | Bianchi VIII vacuum solutions to Einstein's equations are causally geodesically complete to the future, given an appropriate time orientation, and the objective of this article is to analyze the asymptotic behaviour of solutions in this time direction. For the Bianchi class A spacetimes, there is a formulation of the f... |
2106.07123 | Norichika Sago | Norichika Sago, Takahiro Tanaka | Oscillations in the EMRI gravitational wave phase correction as a probe
of reflective boundary of the central black hole | 5 pages, 3 figures; v2: 8 pages, 3 figures, revised Fig.3, accepted
version | Phys. Rev. D 104, 064009 (2021) | 10.1103/PhysRevD.104.064009 | KUNS-2879, YITP-21-62, OCU-PHYS-542, AP-GR-170 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the energy loss due to gravitational radiation of binaries
composed of exotic objects whose horizon boundary conditions are replaced with
reflective ones. Our focus is on the extreme mass-ratio inspirals, in which the
central heavier black hole is replaced with an exotic compact object. We show,
in this ca... | [
{
"created": "Mon, 14 Jun 2021 01:11:21 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Sep 2021 23:55:39 GMT",
"version": "v2"
}
] | 2021-09-06 | [
[
"Sago",
"Norichika",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | We discuss the energy loss due to gravitational radiation of binaries composed of exotic objects whose horizon boundary conditions are replaced with reflective ones. Our focus is on the extreme mass-ratio inspirals, in which the central heavier black hole is replaced with an exotic compact object. We show, in this case... |
gr-qc/9511065 | Miguel Angel Perez Sebastian | A. Feinstein, M. A. P\'erez Sebasti\'an (Dpto. F\'isica Te\'orica,
Univ. Pa\'is Vasco, Spain) | Particle Creation in the Bell-Szekeres Spacetime | 18 pages. To appear in Class. Quantum Grav. 12, November (1995) | Class.Quant.Grav. 12 (1995) 2723-2734 | 10.1088/0264-9381/12/11/005 | null | gr-qc | null | The quantization of a real massless scalar field in a spacetime produced in a
collision of two electromagnetic plane waves with constant wave fronts is
considered. The background geometry in the interaction region, the
Bell-Szekeres solution, is locally isometric to the conformally flat
Bertotti-Robinson universe fil... | [
{
"created": "Fri, 24 Nov 1995 11:16:10 GMT",
"version": "v1"
}
] | 2016-08-15 | [
[
"Feinstein",
"A.",
"",
"Dpto. Física Teórica,\n Univ. País Vasco, Spain"
],
[
"Sebastián",
"M. A. Pérez",
"",
"Dpto. Física Teórica,\n Univ. País Vasco, Spain"
]
] | The quantization of a real massless scalar field in a spacetime produced in a collision of two electromagnetic plane waves with constant wave fronts is considered. The background geometry in the interaction region, the Bell-Szekeres solution, is locally isometric to the conformally flat Bertotti-Robinson universe fille... |
1612.05364 | Karim Noui KN | Pierre Heidmann, Hongguang Liu and Karim Noui | Semi-classical analysis of black holes in Loop Quantum Gravity:
Modelling Hawking radiation with volume fluctuations | 18 pages, 3 figures | Phys. Rev. D 95, 044015 (2017) | 10.1103/PhysRevD.95.044015 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce the notion of fluid approximation of a quantum spherical black
hole in the context of Loop Quantum Gravity. In this limit, the microstates of
the black hole are intertwiners between "large" representations $s_i$ which
typically scale as $s_i \sim \sqrt{a_H}$ where $a_H$ denotes the area of the
horizon in... | [
{
"created": "Fri, 16 Dec 2016 04:29:58 GMT",
"version": "v1"
}
] | 2017-02-22 | [
[
"Heidmann",
"Pierre",
""
],
[
"Liu",
"Hongguang",
""
],
[
"Noui",
"Karim",
""
]
] | We introduce the notion of fluid approximation of a quantum spherical black hole in the context of Loop Quantum Gravity. In this limit, the microstates of the black hole are intertwiners between "large" representations $s_i$ which typically scale as $s_i \sim \sqrt{a_H}$ where $a_H$ denotes the area of the horizon in P... |
2406.11299 | Shaun Fell | Shaun David Brocus Fell, Lavinia Heisenberg | Proca in an Expanding Universe | null | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | The superradiant growth of massive vector fields in rotating black hole
spacetimes has garnered significant attention in recent literature. However,
the majority of these studies overlook the influence of a cosmological
constant, which likely constitutes the primary energy content of our universe.
In this paper, we e... | [
{
"created": "Mon, 17 Jun 2024 08:06:19 GMT",
"version": "v1"
}
] | 2024-06-18 | [
[
"Fell",
"Shaun David Brocus",
""
],
[
"Heisenberg",
"Lavinia",
""
]
] | The superradiant growth of massive vector fields in rotating black hole spacetimes has garnered significant attention in recent literature. However, the majority of these studies overlook the influence of a cosmological constant, which likely constitutes the primary energy content of our universe. In this paper, we ext... |
2306.07782 | Kai Lin | Kai Lin | Quasinormal Modes by Improved Matrix Method and Weighted Residual Method | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | This work discusses the Improved Matrix Method and Weighted Residual Method
for studying the quasinormal modes (QNMs) of black holes. In the first method,
by utilizing Jordan decomposition, the improved matrix method avoids the
calculation of inverse matrices in the original matrix method. This
significantly saves co... | [
{
"created": "Tue, 13 Jun 2023 14:04:28 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Aug 2023 03:15:22 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Jan 2024 14:49:10 GMT",
"version": "v3"
}
] | 2024-01-17 | [
[
"Lin",
"Kai",
""
]
] | This work discusses the Improved Matrix Method and Weighted Residual Method for studying the quasinormal modes (QNMs) of black holes. In the first method, by utilizing Jordan decomposition, the improved matrix method avoids the calculation of inverse matrices in the original matrix method. This significantly saves comp... |
2403.17114 | Ariadna Ribes Metidieri | A. Ribes Metidieri (1), B. Bonga (1), and B. Krishnan (1, 2 and 3)
((1) Institute for Mathematics, Astrophysics and Particle Physics, Radboud
University, (2) Albert-Einstein-Institut, Max-Planck-Institut f\"ur
Gravitationsphysik, and (3) Leibniz Universit\"at Hannover) | Tidal deformations of slowly spinning isolated horizons | 36 pages, 3 pages of supplementary material, 3 figures. Typos
corrected, references added, update of Fig.2 (content unchanged), the
discussion in section VIIC has been extended (results unchanged), and a small
summary of the main results has been added in section I | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is generally believed that tidal deformations of a black hole in an
external field, as measured using its gravitational field multipoles, vanish.
However, this does not mean that the black hole horizon is not deformed. Here
we shall discuss the deformations of a black hole horizon in the presence of an
external fi... | [
{
"created": "Mon, 25 Mar 2024 18:54:34 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jun 2024 12:42:16 GMT",
"version": "v2"
}
] | 2024-06-17 | [
[
"Metidieri",
"A. Ribes",
"",
"1, 2 and 3"
],
[
"Bonga",
"B.",
"",
"1, 2 and 3"
],
[
"Krishnan",
"B.",
"",
"1, 2 and 3"
]
] | It is generally believed that tidal deformations of a black hole in an external field, as measured using its gravitational field multipoles, vanish. However, this does not mean that the black hole horizon is not deformed. Here we shall discuss the deformations of a black hole horizon in the presence of an external fiel... |
1101.2616 | Marco Astorino | Marco Astorino | Accelerating black hole in 2+1 dimensions and 3+1 black (st)ring | 12 pages, 2 figures, JHEP 1101:114,2011 | JHEP 1101:114,2011 | 10.1007/JHEP01(2011)114 | CECS-PHY-10/15 | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/3.0/ | A C-metric type solution for general relativity with cosmological constant is
presented in 2+1 dimensions. It is interpreted as a three-dimensional black
hole accelerated by a strut. Positive values of the cosmological constant are
admissible too. Some embeddings of this metric in the 3+1 space-time are
considered: a... | [
{
"created": "Thu, 13 Jan 2011 17:36:22 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Feb 2011 15:26:34 GMT",
"version": "v2"
}
] | 2011-02-22 | [
[
"Astorino",
"Marco",
""
]
] | A C-metric type solution for general relativity with cosmological constant is presented in 2+1 dimensions. It is interpreted as a three-dimensional black hole accelerated by a strut. Positive values of the cosmological constant are admissible too. Some embeddings of this metric in the 3+1 space-time are considered: acc... |
1405.1202 | Jacek Tafel | Jacek Tafel | Decoupling the momentum constraints in general relativity | 14 pages | Gen. Rel. Grav. 47 (2015) 108 | 10.1007/s10714-015-1953-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a 2+1 decomposition of the vacuum initial conditions in general
relativity. For a constant mean curvature one of the momentum constraints
decouples in quasi isotropic coordinates and it can be solved by quadrature.
The remaining momentum constraints are written in the form of the tangential
Cauchy-Riemann ... | [
{
"created": "Tue, 6 May 2014 09:28:30 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Dec 2014 21:02:05 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Feb 2016 15:17:29 GMT",
"version": "v3"
}
] | 2016-02-12 | [
[
"Tafel",
"Jacek",
""
]
] | We present a 2+1 decomposition of the vacuum initial conditions in general relativity. For a constant mean curvature one of the momentum constraints decouples in quasi isotropic coordinates and it can be solved by quadrature. The remaining momentum constraints are written in the form of the tangential Cauchy-Riemann eq... |
1002.2766 | Vitorio A. De Lorenci | V. A. De Lorenci, M. Faundez-Abans, and J. P. Pereira | Testing the Newton second law in the regime of small accelerations | 5 pages | A&A 503, L1 (2009) | 10.1051/0004-6361/200811520 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been pointed out that the Newtonian second law can be tested in the
very small acceleration regime by using the combined movement of the Earth and
Sun around the Galactic center of mass. It has been shown that there are only
two brief intervals during the year in which the experiment can be completed,
which co... | [
{
"created": "Mon, 15 Feb 2010 14:06:20 GMT",
"version": "v1"
}
] | 2010-02-17 | [
[
"De Lorenci",
"V. A.",
""
],
[
"Faundez-Abans",
"M.",
""
],
[
"Pereira",
"J. P.",
""
]
] | It has been pointed out that the Newtonian second law can be tested in the very small acceleration regime by using the combined movement of the Earth and Sun around the Galactic center of mass. It has been shown that there are only two brief intervals during the year in which the experiment can be completed, which corr... |
2303.04583 | Oleksandr Sobol Dr. | R. Durrer, O. Sobol, S. Vilchinskii | Backreaction from gauge fields produced during inflation | 25 pages, 9 figures | Physical Review D 108, 043540 (2023) | 10.1103/PhysRevD.108.043540 | MS-TP-23-06 | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we study general features of a regime where gauge fields
produced during inflation cause a strong backreaction on the background
evolution and its impact on the spectrum and the correlation length of gauge
fields. With this aim, the gradient-expansion formalism previously proposed for
the description of... | [
{
"created": "Wed, 8 Mar 2023 13:57:17 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Mar 2023 15:22:11 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Nov 2023 00:03:48 GMT",
"version": "v3"
}
] | 2023-11-08 | [
[
"Durrer",
"R.",
""
],
[
"Sobol",
"O.",
""
],
[
"Vilchinskii",
"S.",
""
]
] | In this work, we study general features of a regime where gauge fields produced during inflation cause a strong backreaction on the background evolution and its impact on the spectrum and the correlation length of gauge fields. With this aim, the gradient-expansion formalism previously proposed for the description of i... |
1501.02174 | Przemyslaw Malkiewicz | Herv\'e Bergeron, Ewa Czuchry, Jean Pierre Gazeau, Przemys{\l}aw
Ma{\l}kiewicz, W{\l}odzimierz Piechocki | Smooth Quantum Dynamics of Mixmaster Universe | 2 figures | Phys. Rev. D 92, 061302 (2015) | 10.1103/PhysRevD.92.061302 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a quantum version of the vacuum Bianchi IX model by implementing
affine coherent state quantization combined with a Born-Oppenheimer-like
adiabatic approximation. The analytical treatment is carried out on both
quantum and semiclassical levels. The resolution of the classical singularity
occurs by means of... | [
{
"created": "Fri, 9 Jan 2015 15:30:50 GMT",
"version": "v1"
}
] | 2015-09-16 | [
[
"Bergeron",
"Hervé",
""
],
[
"Czuchry",
"Ewa",
""
],
[
"Gazeau",
"Jean Pierre",
""
],
[
"Małkiewicz",
"Przemysław",
""
],
[
"Piechocki",
"Włodzimierz",
""
]
] | We present a quantum version of the vacuum Bianchi IX model by implementing affine coherent state quantization combined with a Born-Oppenheimer-like adiabatic approximation. The analytical treatment is carried out on both quantum and semiclassical levels. The resolution of the classical singularity occurs by means of a... |
1310.8579 | Dr. Sudhaker Upadhyay | Sudhaker Upadhyay | Finite field-dependent symmetries in perturbative quantum gravity | 9 pages, No figure, Revtex, to appear in Annals of Physics | Annals of Physics 340 (2014) 110 | 10.1016/j.aop.2013.10.012 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we discuss the absolutely anticommuting nilpotent symmetries
for perturbative quantum gravity in general curved spacetime in linear and
non-linear gauges. Further, we analyze the finite field-dependent BRST (FFBRST)
transformation for perturbative quantum gravity in general curved spacetime.
The FFBRST ... | [
{
"created": "Thu, 31 Oct 2013 16:33:01 GMT",
"version": "v1"
}
] | 2013-11-25 | [
[
"Upadhyay",
"Sudhaker",
""
]
] | In this paper we discuss the absolutely anticommuting nilpotent symmetries for perturbative quantum gravity in general curved spacetime in linear and non-linear gauges. Further, we analyze the finite field-dependent BRST (FFBRST) transformation for perturbative quantum gravity in general curved spacetime. The FFBRST tr... |
1808.02995 | Bo Wang | Bo Wang, Yang Zhang | Estimation of spectrum and parameters of relic gravitational waves using
space-borne interferometers | Fix some typos in this updated version. 55 pages, 16 figures | Research in Astronomy and Astrophysics Vol.19 No.2, 24 (2019) | 10.1088/1674-4527/19/2/24 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a study of spectrum estimation of relic gravitational waves (RGWs)
as a Gaussian stochastic background from output signals of future space-borne
interferometers, like LISA and ASTROD. As the target of detection, the
analytical spectrum of RGWs generated during inflation is described by three
parameters: th... | [
{
"created": "Thu, 9 Aug 2018 01:59:35 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Jan 2019 11:23:30 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Feb 2019 11:20:01 GMT",
"version": "v3"
},
{
"created": "Thu, 21 Feb 2019 14:49:51 GMT",
"version": "v4"
},
{
"cr... | 2019-03-05 | [
[
"Wang",
"Bo",
""
],
[
"Zhang",
"Yang",
""
]
] | We present a study of spectrum estimation of relic gravitational waves (RGWs) as a Gaussian stochastic background from output signals of future space-borne interferometers, like LISA and ASTROD. As the target of detection, the analytical spectrum of RGWs generated during inflation is described by three parameters: the ... |
gr-qc/0409067 | Yury F. Pirogov | Yu. F. Pirogov | Space-time revisited | 8 pages. Report presented at the 13th Intern. Seminar on High Energy
Physics "Quarks-2004", Pushkinskie Gory, Russia, May 24-30, 2004 | null | null | null | gr-qc astro-ph hep-ph | null | The metric space-time is revised as a priori existing. It is substituted by
the world continuum endowed only with the affine connection. The metric,
accompanied by the tensor Goldstone boson, is to emerge during the spontaneous
breaking of the global affine symmetry. Implications for gravity and the
Universe are indi... | [
{
"created": "Fri, 17 Sep 2004 18:25:23 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pirogov",
"Yu. F.",
""
]
] | The metric space-time is revised as a priori existing. It is substituted by the world continuum endowed only with the affine connection. The metric, accompanied by the tensor Goldstone boson, is to emerge during the spontaneous breaking of the global affine symmetry. Implications for gravity and the Universe are indica... |
1703.07644 | Guo-Ping Li | Guo-Ping Li, Zhong-Wen Feng, Hui-Ling Li, Xiao-Tao Zu | Dirac equation of spin particles and tunneling radiation from a
Kinnersly black | 7 pages | null | 10.1140/epjc/s10052-017-4806-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In curved space-time, Hamilton-Jacobi equation is a semi-classical particle's
motion equation, which plays an important role in the research of black hole
physics. In this paper, starting from Dirac equation describing the spin 1/2
fermion and Rarita-Schwinger equation describing the spin 3/2 fermion
respectively, we... | [
{
"created": "Sat, 18 Mar 2017 11:22:18 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Mar 2017 10:00:53 GMT",
"version": "v2"
}
] | 2017-05-24 | [
[
"Li",
"Guo-Ping",
""
],
[
"Feng",
"Zhong-Wen",
""
],
[
"Li",
"Hui-Ling",
""
],
[
"Zu",
"Xiao-Tao",
""
]
] | In curved space-time, Hamilton-Jacobi equation is a semi-classical particle's motion equation, which plays an important role in the research of black hole physics. In this paper, starting from Dirac equation describing the spin 1/2 fermion and Rarita-Schwinger equation describing the spin 3/2 fermion respectively, we d... |
gr-qc/9705029 | Boyko | B. V. Ivanov | Colliding plane waves with W=M=0 | 6 pages, LaTeX | null | null | null | gr-qc | null | It is shown that there are three vacuum and one electrovacuum solutions of
diagonal plane waves with M=0 and constant Maxwell scalars. Namely, these are
the single wave, Stoyanov, Babala and Bell-Szekeres solutions. A comparison is
made with the planar solutions of Taub.
| [
{
"created": "Tue, 13 May 1997 12:47:53 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ivanov",
"B. V.",
""
]
] | It is shown that there are three vacuum and one electrovacuum solutions of diagonal plane waves with M=0 and constant Maxwell scalars. Namely, these are the single wave, Stoyanov, Babala and Bell-Szekeres solutions. A comparison is made with the planar solutions of Taub. |
2308.03506 | Ming Zhang | Ming Zhang, Sheng-Yuan Li, De-Cheng Zou, Chao-Ming Zhang | Analytical approximate solutions of AdS black holes in
Einstein-Weyl-scalar gravity | null | Chinese Physics C, Vol. 47, No. 12 (2023) 125102 | 10.1088/1674-1137/acfcb0 | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | We consider Einstein-Weyl gravity with a minimally coupled scalar field in
four dimensional spacetime. By using the Minimal Geometric Deformation (MGD)
approach, we split the highly nonlinear coupled field equations into two
subsystems that describing the background geometry and scalar field source,
respectively. Reg... | [
{
"created": "Mon, 7 Aug 2023 12:01:35 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Nov 2023 14:05:43 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Nov 2023 10:05:30 GMT",
"version": "v3"
}
] | 2023-11-09 | [
[
"Zhang",
"Ming",
""
],
[
"Li",
"Sheng-Yuan",
""
],
[
"Zou",
"De-Cheng",
""
],
[
"Zhang",
"Chao-Ming",
""
]
] | We consider Einstein-Weyl gravity with a minimally coupled scalar field in four dimensional spacetime. By using the Minimal Geometric Deformation (MGD) approach, we split the highly nonlinear coupled field equations into two subsystems that describing the background geometry and scalar field source, respectively. Regar... |
1508.02118 | Handhika Ramadhan | Ilham Prasetyo and Handhika S. Ramadhan | Gravity of a noncanonical global monopole: conical topology and
compactification | Erratum added | Gen.Rel.Grav. 48 (2016) no.1, 10 | 10.1007/s10714-015-1998-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain solutions of Einstein's equations describing gravitational field
outside a noncanonical global monopole with cosmological constant. In
particular, we consider two models of k-monopoles: the Dirac-Born-Infeld (DBI)
and the power-law types, and study their corresponding exterior gravitational
fields. For each... | [
{
"created": "Mon, 10 Aug 2015 03:48:42 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Nov 2015 16:17:42 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Oct 2016 05:36:33 GMT",
"version": "v3"
},
{
"created": "Thu, 13 Oct 2016 11:29:59 GMT",
"version": "v4"
}
] | 2016-10-14 | [
[
"Prasetyo",
"Ilham",
""
],
[
"Ramadhan",
"Handhika S.",
""
]
] | We obtain solutions of Einstein's equations describing gravitational field outside a noncanonical global monopole with cosmological constant. In particular, we consider two models of k-monopoles: the Dirac-Born-Infeld (DBI) and the power-law types, and study their corresponding exterior gravitational fields. For each m... |
2202.08632 | Krsna Dev | Krsna Dev | Exact solutions for charged spheres and their stability. II. Anisotropic
Fluids | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study exact solutions of the Einstein-Maxwell equations for the interior
gravitational field of static spherically symmetric charged compact spheres.
The spheres consist of an anisotropic fluid with a charge distribution that
gives rise to a static radial electric field. The density of the fluid has the
form $\rho... | [
{
"created": "Thu, 17 Feb 2022 12:37:55 GMT",
"version": "v1"
}
] | 2022-02-18 | [
[
"Dev",
"Krsna",
""
]
] | We study exact solutions of the Einstein-Maxwell equations for the interior gravitational field of static spherically symmetric charged compact spheres. The spheres consist of an anisotropic fluid with a charge distribution that gives rise to a static radial electric field. The density of the fluid has the form $\rho (... |
gr-qc/9804015 | Hideo Iguchi | Hideo Iguchi, Ken-ichi Nakao and Tomohiro Harada | Gravitational Waves around a Naked Singularity -- Odd-Parity
Perturbation of Lemaitre-Tolman-Bondi Space-Time -- | 19 pages, 12 figures, to be published in Physical Review D | Phys.Rev. D57 (1998) 7262-7273 | 10.1103/PhysRevD.57.7262 | KUNS 1475 | gr-qc | null | The motion of a spherical dust cloud is described by the
Lemaitre-Tolman-Bondi solution and is completely specified by initial values of
distributions of the rest mass density and specific energy of the dust fluid.
From generic initial conditions of this spherically symmetric collapse, there
appears a naked singula... | [
{
"created": "Mon, 6 Apr 1998 05:37:40 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Iguchi",
"Hideo",
""
],
[
"Nakao",
"Ken-ichi",
""
],
[
"Harada",
"Tomohiro",
""
]
] | The motion of a spherical dust cloud is described by the Lemaitre-Tolman-Bondi solution and is completely specified by initial values of distributions of the rest mass density and specific energy of the dust fluid. From generic initial conditions of this spherically symmetric collapse, there appears a naked singularity... |
1006.4295 | James Ryan | Bianca Dittrich and James P. Ryan | Simplicity in simplicial phase space | Typos and references corrected | Phys.Rev.D82:064026,2010 | 10.1103/PhysRevD.82.064026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A key point in the spin foam approach to quantum gravity is the
implementation of simplicity constraints in the partition functions of the
models. Here, we discuss the imposition of these constraints in a phase space
setting corresponding to simplicial geometries. On the one hand, this could
serve as a starting point... | [
{
"created": "Tue, 22 Jun 2010 13:57:15 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Sep 2010 16:29:52 GMT",
"version": "v2"
}
] | 2014-11-21 | [
[
"Dittrich",
"Bianca",
""
],
[
"Ryan",
"James P.",
""
]
] | A key point in the spin foam approach to quantum gravity is the implementation of simplicity constraints in the partition functions of the models. Here, we discuss the imposition of these constraints in a phase space setting corresponding to simplicial geometries. On the one hand, this could serve as a starting point f... |
1709.06800 | Diego S\'aez-Chill\'on G\'omez | Sergei D. Odintsov, Diego Saez-Chillon Gomez and German S. Sharov | Is exponential gravity a viable description for the whole cosmological
history? | 20 pages, 6 figures, analysis extended, version published in EPJC | Eur.Phys.J. C77 862 (2017) | 10.1140/epjc/s10052-017-5419-z | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here we analysed a particular type of $F(R)$ gravity, the so-called
exponential gravity which includes an exponential function of the Ricci scalar
in the action. Such term represents a correction to the usual Hilbert-Einstein
action. By using Supernovae Ia, Barionic Acoustic Oscillations, Cosmic
Microwave Background ... | [
{
"created": "Wed, 20 Sep 2017 10:35:05 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Dec 2017 18:34:48 GMT",
"version": "v2"
}
] | 2018-01-17 | [
[
"Odintsov",
"Sergei D.",
""
],
[
"Gomez",
"Diego Saez-Chillon",
""
],
[
"Sharov",
"German S.",
""
]
] | Here we analysed a particular type of $F(R)$ gravity, the so-called exponential gravity which includes an exponential function of the Ricci scalar in the action. Such term represents a correction to the usual Hilbert-Einstein action. By using Supernovae Ia, Barionic Acoustic Oscillations, Cosmic Microwave Background an... |
1401.6912 | J. Navarro-Salas | Adrian del Rio and Jose Navarro-Salas | Spacetime correlators of perturbations in slow-roll de Sitter inflation | Clarifying comments and new references added. Misprints corrected | Phys. Rev. D89 (2014) 084037 | 10.1103/PhysRevD.89.084037 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two-point correlators and self-correlators of primordial perturbations in
quasi-de Sitter spacetime backgrounds are considered. For large separations
two-point correlators exhibit nearly scale invariance, while for short
distances self-correlators need standard renormalization. We study the
deformation of two-point c... | [
{
"created": "Mon, 27 Jan 2014 16:28:57 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Apr 2014 04:32:19 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"del Rio",
"Adrian",
""
],
[
"Navarro-Salas",
"Jose",
""
]
] | Two-point correlators and self-correlators of primordial perturbations in quasi-de Sitter spacetime backgrounds are considered. For large separations two-point correlators exhibit nearly scale invariance, while for short distances self-correlators need standard renormalization. We study the deformation of two-point cor... |
gr-qc/9901013 | Piotr Jaranowski | Piotr Jaranowski (Institute of Physics, Bialystok University,
Bialystok, Poland), Andrzej Krolak (Institute of Mathematics, Polish Academy
of Sciences, Warsaw, Poland) | Data analysis of gravitational-wave signals from spinning neutron stars.
III. Detection statistics and computational requirements | LaTeX, 45 pages, 13 figures, submitted to Phys. Rev. D | Phys.Rev.D61:062001,2000 | 10.1103/PhysRevD.61.062001 | null | gr-qc | null | We develop the analytic and numerical tools for data analysis of the
gravitational-wave signals from spinning neutron stars for ground-based laser
interferometric detectors. We study in detail the statistical properties of the
optimum functional that need to be calculated in order to detect the
gravitational-wave sig... | [
{
"created": "Wed, 6 Jan 1999 20:49:12 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Jaranowski",
"Piotr",
"",
"Institute of Physics, Bialystok University,\n Bialystok, Poland"
],
[
"Krolak",
"Andrzej",
"",
"Institute of Mathematics, Polish Academy\n of Sciences, Warsaw, Poland"
]
] | We develop the analytic and numerical tools for data analysis of the gravitational-wave signals from spinning neutron stars for ground-based laser interferometric detectors. We study in detail the statistical properties of the optimum functional that need to be calculated in order to detect the gravitational-wave signa... |
1710.06185 | Arunava Mukherjee | Arunava Mukherjee (1, 2), Chris Messenger (3), Keith Riles (4) ((1)
AEI-MPI Hannover, (2) ICTS-TIFR, (3) Univ. of Glasgow, (4) Univ. of Michigan
Ann Arbor) | Accretion-induced spin-wandering effects on the neutron star in Scorpius
X-1: Implications for continuous gravitational wave searches | 13 pages, 12 figures | Phys. Rev. D 97, 043016 (2018) | 10.1103/PhysRevD.97.043016 | null | gr-qc astro-ph.HE physics.data-an | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The LIGO's discovery of binary black hole mergers has opened up a new era of
transient gravitational wave astronomy. The potential detection of
gravitational radiation from another class of astronomical objects, rapidly
spinning non-axisymmetric neutron stars, would constitute a new area of
gravitational wave astrono... | [
{
"created": "Tue, 17 Oct 2017 09:37:33 GMT",
"version": "v1"
}
] | 2018-03-07 | [
[
"Mukherjee",
"Arunava",
""
],
[
"Messenger",
"Chris",
""
],
[
"Riles",
"Keith",
""
]
] | The LIGO's discovery of binary black hole mergers has opened up a new era of transient gravitational wave astronomy. The potential detection of gravitational radiation from another class of astronomical objects, rapidly spinning non-axisymmetric neutron stars, would constitute a new area of gravitational wave astronomy... |
2406.12511 | Luca Guido Molinari | Carlo Alberto Mantica and Luca Guido Molinari | Conformal Killing gravity in static spherically-symmetric spacetimes | 8 pages, references updated, accepted for publication in PRD | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We identify an anisotropic divergence-free conformal Killing tensor $K_{jl}$
for static spherically symmetric spacetimes, and write the conformal Killing
gravity equations as Einstein equations augmented by this tensor. The field
equations are of second order: this fact allows for analytic solutions and
considerably ... | [
{
"created": "Tue, 18 Jun 2024 11:27:55 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jul 2024 11:55:38 GMT",
"version": "v2"
}
] | 2024-07-24 | [
[
"Mantica",
"Carlo Alberto",
""
],
[
"Molinari",
"Luca Guido",
""
]
] | We identify an anisotropic divergence-free conformal Killing tensor $K_{jl}$ for static spherically symmetric spacetimes, and write the conformal Killing gravity equations as Einstein equations augmented by this tensor. The field equations are of second order: this fact allows for analytic solutions and considerably si... |
1606.07008 | Amir Masoud Ghezelbash | A. M. Ghezelbash, V. Kumar | Exact Solutions to Einstein-Maxwell theory on Eguchi-Hanson Space | 13 pages, 2 figures, typos corrected | Int. J. Mod. Phys. A, 32, 1750098 (2017) | 10.1142/S0217751X17500981 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we construct explicit analytical exact solutions to the six
and higher dimensional Einstein-Maxwell theory. In all solutions, a subspace of
the metric is the Eguchi-Hanson space where the metric functions are completely
determined in terms of known analytical functions. Moreover, we find the
solution... | [
{
"created": "Wed, 22 Jun 2016 16:44:14 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Nov 2016 02:16:52 GMT",
"version": "v2"
},
{
"created": "Sun, 26 Mar 2017 17:38:49 GMT",
"version": "v3"
}
] | 2017-09-28 | [
[
"Ghezelbash",
"A. M.",
""
],
[
"Kumar",
"V.",
""
]
] | In this article, we construct explicit analytical exact solutions to the six and higher dimensional Einstein-Maxwell theory. In all solutions, a subspace of the metric is the Eguchi-Hanson space where the metric functions are completely determined in terms of known analytical functions. Moreover, we find the solutions ... |
gr-qc/0206082 | Uwe Muench | Bahram Mashhoon and Uwe Muench (Univ. of Missouri-Columbia) | Length measurement in accelerated systems | LaTeX file (annalen.cls), 4 figures, 17 pages, accepted for
publication in Annalen der Physik | Annalen Phys. 11 (2002) 532-547 | 10.1002/1521-3889(200208)11:7<532::AID-ANDP532>3.0.CO;2-3 | null | gr-qc | null | We investigate the limitations of length measurements by accelerated
observers in Minkowski spacetime brought about via the hypothesis of locality,
namely, the assumption that an accelerated observer at each instant is
equivalent to an otherwise identical momentarily comoving inertial observer. We
find that consisten... | [
{
"created": "Thu, 27 Jun 2002 00:20:24 GMT",
"version": "v1"
}
] | 2017-09-27 | [
[
"Mashhoon",
"Bahram",
"",
"Univ. of Missouri-Columbia"
],
[
"Muench",
"Uwe",
"",
"Univ. of Missouri-Columbia"
]
] | We investigate the limitations of length measurements by accelerated observers in Minkowski spacetime brought about via the hypothesis of locality, namely, the assumption that an accelerated observer at each instant is equivalent to an otherwise identical momentarily comoving inertial observer. We find that consistency... |
gr-qc/9709024 | Joan Masso | Miguel Alcubierre and Joan Masso | Pathologies of hyperbolic gauges in general relativity and other field
theories | 5 pages, includes 2 figs. To appear in Phys.Rev.D Rapid Comm | Phys.Rev.D57:4511-4515,1998 | 10.1103/PhysRevD.57.4511 | null | gr-qc | null | We present a mathematical characterization of hyperbolic gauge pathologies in
general relativity and electrodynamics. We show how non-linear gauge terms can
produce a blow-up along characteristics and how this can be identified
numerically by performing convergence analysis. Finally, we show some numerical
examples a... | [
{
"created": "Thu, 11 Sep 1997 11:20:29 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jan 1998 14:25:27 GMT",
"version": "v2"
}
] | 2010-01-06 | [
[
"Alcubierre",
"Miguel",
""
],
[
"Masso",
"Joan",
""
]
] | We present a mathematical characterization of hyperbolic gauge pathologies in general relativity and electrodynamics. We show how non-linear gauge terms can produce a blow-up along characteristics and how this can be identified numerically by performing convergence analysis. Finally, we show some numerical examples and... |
2203.16286 | Simone Albanesi | Simone Albanesi, Andrea Placidi, Alessandro Nagar, Marta Orselli, and
Sebastiano Bernuzzi | New Avenue for Accurate Analytical Waveforms and Fluxes for Eccentric
Compact Binaries | 7 pages, 6 figures, supplementary material fixed | null | 10.1103/PhysRevD.105.L121503 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a new paradigm for constructing accurate analytic waveforms (and
fluxes) for eccentric compact binaries. Our recipe builds on the standard
Post-Newtonian (PN) approach but (i) retains implicit time-derivatives of the
phase space variables in the instantaneous part of the noncircular waveform,
and then (i... | [
{
"created": "Wed, 30 Mar 2022 13:27:39 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2022 11:00:03 GMT",
"version": "v2"
},
{
"created": "Wed, 31 Aug 2022 14:30:19 GMT",
"version": "v3"
}
] | 2022-09-01 | [
[
"Albanesi",
"Simone",
""
],
[
"Placidi",
"Andrea",
""
],
[
"Nagar",
"Alessandro",
""
],
[
"Orselli",
"Marta",
""
],
[
"Bernuzzi",
"Sebastiano",
""
]
] | We introduce a new paradigm for constructing accurate analytic waveforms (and fluxes) for eccentric compact binaries. Our recipe builds on the standard Post-Newtonian (PN) approach but (i) retains implicit time-derivatives of the phase space variables in the instantaneous part of the noncircular waveform, and then (ii)... |
1904.08670 | Bob Osano | Bob Osano and Timothy Oreta | A transient phase in cosmological evolution : A multi-fluid
approximation for a quasi-thermodynamics equilibrium | 11 pages, 2 figures | null | 10.1007/s10714-020-02694-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article presents the study of a multi-species fluid characterised by a
freeze-out or break-away of one or more species. Whereas single-fluid
approximation suffices for modelling of the pre {\it freeze-out} period,
multi-fluid approximation is required for the post freeze-out period. Embedded
in this is a transit... | [
{
"created": "Thu, 18 Apr 2019 10:19:39 GMT",
"version": "v1"
},
{
"created": "Mon, 6 May 2019 12:20:28 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Jun 2019 16:57:48 GMT",
"version": "v3"
},
{
"created": "Tue, 21 Apr 2020 19:03:54 GMT",
"version": "v4"
}
] | 2020-05-06 | [
[
"Osano",
"Bob",
""
],
[
"Oreta",
"Timothy",
""
]
] | This article presents the study of a multi-species fluid characterised by a freeze-out or break-away of one or more species. Whereas single-fluid approximation suffices for modelling of the pre {\it freeze-out} period, multi-fluid approximation is required for the post freeze-out period. Embedded in this is a transitio... |
gr-qc/0310089 | Pavel Krtous | Pavel Krtous, Jiri Podolsky | Gravitational and electromagnetic fields near an anti-de Sitter-like
infinity | 4 pages, 2 figures | Phys.Rev. D69 (2004) 084023 | 10.1103/PhysRevD.69.084023 | null | gr-qc | null | We analyze asymptotic structure of general gravitational and electromagnetic
fields near an anti-de Sitter-like conformal infinity. Dependence of the
radiative component of the fields on a null direction along which the infinity
is approached is obtained. The directional pattern of outgoing and ingoing
radiation, whi... | [
{
"created": "Fri, 17 Oct 2003 10:15:42 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Krtous",
"Pavel",
""
],
[
"Podolsky",
"Jiri",
""
]
] | We analyze asymptotic structure of general gravitational and electromagnetic fields near an anti-de Sitter-like conformal infinity. Dependence of the radiative component of the fields on a null direction along which the infinity is approached is obtained. The directional pattern of outgoing and ingoing radiation, which... |
gr-qc/0607026 | Branislav Cvetkovi\'c | M. Blagojevic and B. Cvetkovic | Covariant description of the black hole entropy in 3D gravity | 12 pages, LaTeX, v2: new material in section IV clarifies the effects
pertaining to the use of different coordinate systems | Class.Quant.Grav.24:129-140,2007 | 10.1088/0264-9381/24/1/007 | null | gr-qc hep-th | null | We study the entropy of the black hole with torsion using the covariant form
of the partition function. The regularization of infinities appearing in the
semiclassical calculation is shown to be consistent with the grand canonical
boundary conditions. The correct value for the black hole entropy is obtained
provided ... | [
{
"created": "Thu, 6 Jul 2006 18:55:08 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Nov 2006 11:22:34 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Blagojevic",
"M.",
""
],
[
"Cvetkovic",
"B.",
""
]
] | We study the entropy of the black hole with torsion using the covariant form of the partition function. The regularization of infinities appearing in the semiclassical calculation is shown to be consistent with the grand canonical boundary conditions. The correct value for the black hole entropy is obtained provided th... |
1909.07348 | Ettore Minguzzi | E. Minguzzi | A gravitational collapse singularity theorem consistent with black hole
evaporation | 16 pages. v2: fixed some typos, added one figure, removed achronality
condition on trapped surface, discussed optimality. v3: improved statement of
theorem 2.6, matches published version | Lett. Math. Phys. 110 (2020) 2383-2396 | 10.1007/s11005-020-01295-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The global hyperbolicity assumption present in gravitational collapse
singularity theorems is in tension with the quantum mechanical phenomenon of
black hole evaporation. In this work I show that the causality conditions in
Penrose's theorem can be almost completely removed. As a result, it is possible
to infer the f... | [
{
"created": "Mon, 16 Sep 2019 17:29:08 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Nov 2019 20:14:31 GMT",
"version": "v2"
},
{
"created": "Sun, 7 Jun 2020 03:41:23 GMT",
"version": "v3"
}
] | 2020-08-31 | [
[
"Minguzzi",
"E.",
""
]
] | The global hyperbolicity assumption present in gravitational collapse singularity theorems is in tension with the quantum mechanical phenomenon of black hole evaporation. In this work I show that the causality conditions in Penrose's theorem can be almost completely removed. As a result, it is possible to infer the for... |
0809.3376 | Mubasher Jamil | Mubasher Jamil, M. Umar Farooq and Muneer Ahmad Rashid | Wormholes supported by phantom-like modified Chaplygin gas | 14 pages; 6 figs | Eur.Phys.J.C59:907-912,2009 | 10.1140/epjc/s10052-008-0845-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have examined the possible construction of a stationary, spherically
symmetric and spatially inhomogeneous wormhole spacetime supported by the
phantom energy. The later is supposed to be represented by the modified
Chaplygin gas equation of state. The solutions so obtained satisfy the flare
out and the asymptotic ... | [
{
"created": "Fri, 19 Sep 2008 04:51:43 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Dec 2008 17:15:29 GMT",
"version": "v2"
},
{
"created": "Fri, 12 Dec 2008 15:36:14 GMT",
"version": "v3"
},
{
"created": "Thu, 19 Feb 2009 13:35:47 GMT",
"version": "v4"
}
] | 2009-03-27 | [
[
"Jamil",
"Mubasher",
""
],
[
"Farooq",
"M. Umar",
""
],
[
"Rashid",
"Muneer Ahmad",
""
]
] | We have examined the possible construction of a stationary, spherically symmetric and spatially inhomogeneous wormhole spacetime supported by the phantom energy. The later is supposed to be represented by the modified Chaplygin gas equation of state. The solutions so obtained satisfy the flare out and the asymptotic fl... |
1112.5934 | Koichiro Kobayashi | Takuya Maki (Japan Women's College), Nahomi Kan (Yamaguchi Junior
College), Koichiro Kobayashi and Kiyoshi Shiraishi (Yamaguchi University) | Flux vacua in Dirac-Born-Infeld type Einstein-Maxwell theory | 4 pages, 2 eps figure. To appear in the Proceedings of 21st Workshop
in General Relativity and Gravitation in Japan (JGRG21), held in Sakura Hall,
Katahira Campus, Tohoku University, Sendai, Japan (26 - 29 September 2011) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study compactification of extra dimensions in a theory of
Dirac-Born-Infeld (DBI) type gravity. We investigate the solution for Minkowski
spacetime with an $S^{2}$ extra space. The solution is derived by the effective
potential method in the presence of the magnetic flux on the extra sphere. We
find that, in a cer... | [
{
"created": "Tue, 27 Dec 2011 07:32:32 GMT",
"version": "v1"
}
] | 2011-12-30 | [
[
"Maki",
"Takuya",
"",
"Japan Women's College"
],
[
"Kan",
"Nahomi",
"",
"Yamaguchi Junior\n College"
],
[
"Kobayashi",
"Koichiro",
"",
"Yamaguchi University"
],
[
"Shiraishi",
"Kiyoshi",
"",
"Yamaguchi University"
]
] | We study compactification of extra dimensions in a theory of Dirac-Born-Infeld (DBI) type gravity. We investigate the solution for Minkowski spacetime with an $S^{2}$ extra space. The solution is derived by the effective potential method in the presence of the magnetic flux on the extra sphere. We find that, in a certa... |
gr-qc/9508056 | null | Giampiero Esposito | Non-Local Properties in Euclidean Quantum Gravity | 11 pages, plain-tex, revised version, to appear in Proceedings of the
Third Workshop on Quantum Field Theory under the Influence of External
Conditions (Leipzig, 18-22 September 1995). In the revised version, the
presentation has been improved | null | 10.1007/978-3-663-01204-7_41 | DSF 95/37 | gr-qc | null | In the one-loop approximation for Euclidean quantum gravity, the boundary
conditions which are completely invariant under gauge transformations of metric
perturbations involve both normal and tangential derivatives of the metric
perturbations $h_{00}$ and $h_{0i}$, while the $h_{ij}$ perturbations and the
whole ghost... | [
{
"created": "Mon, 28 Aug 1995 13:03:15 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Sep 1995 20:36:12 GMT",
"version": "v2"
}
] | 2022-04-13 | [
[
"Esposito",
"Giampiero",
""
]
] | In the one-loop approximation for Euclidean quantum gravity, the boundary conditions which are completely invariant under gauge transformations of metric perturbations involve both normal and tangential derivatives of the metric perturbations $h_{00}$ and $h_{0i}$, while the $h_{ij}$ perturbations and the whole ghost o... |
gr-qc/9610019 | Markus Heusler | Markus Heusler | No-Hair Theorems and Black Holes with Hair | 28 pages, latex | Helv.Phys.Acta 69 (1996) 501-528 | null | ZU-TH-28/96 | gr-qc | null | The critical steps leading to the uniqueness theorem for the Kerr-Newman
metric are reexamined in the light of the new black hole solutions with
Yang-Mills and scalar hair. Various methods -- including scaling techniques,
arguments based on energy conditions, conformal transformations and divergence
identities -- are... | [
{
"created": "Fri, 11 Oct 1996 11:36:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Heusler",
"Markus",
""
]
] | The critical steps leading to the uniqueness theorem for the Kerr-Newman metric are reexamined in the light of the new black hole solutions with Yang-Mills and scalar hair. Various methods -- including scaling techniques, arguments based on energy conditions, conformal transformations and divergence identities -- are r... |
1410.6675 | Gerard Hooft 't | Gerard T. Hooft | Local Conformal Symmetry: the Missing Symmetry Component for Space and
Time | 4 pages + refs. Adjusted for submission as Essay written for the
Gravity Research Foundation 2015 Awards for Essays on Gravitation | null | null | ITP-UU-14/25; SPIN-14/19 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Local conformal symmetry is usually considered to be an approximate symmetry
of nature, which is explicitly and badly broken. Arguments are brought forward
here why it has to be turned into an exact symmetry that is spontaneously
broken. As in the B.E.H. mechanism in Yang-Mills theories, we then will have a
mechanism... | [
{
"created": "Fri, 24 Oct 2014 13:17:30 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Oct 2014 09:14:26 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Mar 2015 12:14:26 GMT",
"version": "v3"
}
] | 2015-03-18 | [
[
"Hooft",
"Gerard T.",
""
]
] | Local conformal symmetry is usually considered to be an approximate symmetry of nature, which is explicitly and badly broken. Arguments are brought forward here why it has to be turned into an exact symmetry that is spontaneously broken. As in the B.E.H. mechanism in Yang-Mills theories, we then will have a mechanism f... |
gr-qc/0203048 | Sergio Dain | S. Dain and O. M. Moreschi | General existence proof for rest frame systems in asymptotically flat
space-time | 14 pages, no figures, LaTeX 2e | Class.Quant.Grav. 17 (2000) 3663-3672 | 10.1088/0264-9381/17/18/305 | null | gr-qc | null | We report a new result on the nice section construction used in the
definition of rest frame systems in general relativity. This construction is
needed in the study of non trivial gravitational radiating systems. We prove
existence, regularity and non-self-crossing property of solutions of the nice
section equation f... | [
{
"created": "Wed, 13 Mar 2002 15:36:26 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Dain",
"S.",
""
],
[
"Moreschi",
"O. M.",
""
]
] | We report a new result on the nice section construction used in the definition of rest frame systems in general relativity. This construction is needed in the study of non trivial gravitational radiating systems. We prove existence, regularity and non-self-crossing property of solutions of the nice section equation for... |
gr-qc/0502110 | Joao Magueijo | Dagny Kimberly and Joao Magueijo | Phenomenological Quantum Gravity | Lectures given at XI BSCG | AIP Conf.Proc.782:241-263,2005 | 10.1063/1.2032733 | null | gr-qc astro-ph hep-ph | null | These notes summarize a set of lectures on phenomenological quantum gravity
which one of us delivered and the other attended with great diligence. They
cover an assortment of topics on the border between theoretical quantum gravity
and observational anomalies. Specifically, we review non-linear relativity in
its rela... | [
{
"created": "Fri, 25 Feb 2005 16:00:32 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Kimberly",
"Dagny",
""
],
[
"Magueijo",
"Joao",
""
]
] | These notes summarize a set of lectures on phenomenological quantum gravity which one of us delivered and the other attended with great diligence. They cover an assortment of topics on the border between theoretical quantum gravity and observational anomalies. Specifically, we review non-linear relativity in its relati... |
1903.10059 | Abhinandan Dass | Abhinandan Dass, Stefano Liberati | Gravitoelectromagnetism in metric f(R) and Brans-Dicke theories with a
potential | null | null | 10.1007/s10714-019-2568-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Gravitoelectromagnetism formalism in the context of metric f(R) theory is
presented and the analogue Lorentz force law is derived. Some interesting
results such as the dependence of the deviation from General Relativity on the
absolute value of the scalar potential are found, it is also found that the
f(R) effects ... | [
{
"created": "Sun, 24 Mar 2019 21:02:20 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Aug 2019 20:58:24 GMT",
"version": "v2"
}
] | 2019-08-28 | [
[
"Dass",
"Abhinandan",
""
],
[
"Liberati",
"Stefano",
""
]
] | A Gravitoelectromagnetism formalism in the context of metric f(R) theory is presented and the analogue Lorentz force law is derived. Some interesting results such as the dependence of the deviation from General Relativity on the absolute value of the scalar potential are found, it is also found that the f(R) effects ar... |
gr-qc/0609092 | Amos Ori | Amos Ori | Inside an evaporating two-dimensional charged black hole | 5 pages; typo corrected | null | null | null | gr-qc hep-th | null | We investigate the inner structure of an evaporating charged black hole,
within the context of semiclassical dilaton gravity in two dimensions. The
matter fields are charged, allowing the evaporation of both the mass and charge
of the black hole. We find that the semiclassical effects cause the inner
horizon to expan... | [
{
"created": "Thu, 21 Sep 2006 14:27:18 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Sep 2006 08:03:36 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Ori",
"Amos",
""
]
] | We investigate the inner structure of an evaporating charged black hole, within the context of semiclassical dilaton gravity in two dimensions. The matter fields are charged, allowing the evaporation of both the mass and charge of the black hole. We find that the semiclassical effects cause the inner horizon to expand ... |
2205.08469 | Alejandro Perez | Alejandro Perez and Daniel Sudarsky | A dialog on the fate of information in black hole evaporation | Prepared for the AVS Quantum Science Special Topic Collection
Celebrating Sir Roger Penrose's Nobel Prize | null | 10.1116/5.0091962 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present two alternative perspectives for the resolution of Hawking's
information puzzle in black hole evaporation. The two views are deeply
contrasting, yet they share several common aspects. One of them is the central
role played by the existence of the interior singularity (whose physical
relevance is implied by... | [
{
"created": "Tue, 17 May 2022 16:21:22 GMT",
"version": "v1"
}
] | 2024-06-19 | [
[
"Perez",
"Alejandro",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | We present two alternative perspectives for the resolution of Hawking's information puzzle in black hole evaporation. The two views are deeply contrasting, yet they share several common aspects. One of them is the central role played by the existence of the interior singularity (whose physical relevance is implied by t... |
1501.02149 | Jiro Matsumoto | Jiro Matsumoto, Sergei D. Odintsov, and Sergey V. Sushkov | Cosmological perturbations in mimetic matter model | 20 pages, 7 figures, version to appear in PRD | Phys. Rev. D 91, 064062 (2015) | 10.1103/PhysRevD.91.064062 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the cosmological evolution of mimetic matter model with
arbitrary scalar potential. The cosmological reconstruction, which is the way
to construct a model for arbitrary evolutions of the scale factor, is
explicitly done for different choices of potential. The cases that mimetic
matter model shows the e... | [
{
"created": "Fri, 9 Jan 2015 14:12:19 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Mar 2015 13:53:44 GMT",
"version": "v2"
}
] | 2015-04-01 | [
[
"Matsumoto",
"Jiro",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Sushkov",
"Sergey V.",
""
]
] | We investigate the cosmological evolution of mimetic matter model with arbitrary scalar potential. The cosmological reconstruction, which is the way to construct a model for arbitrary evolutions of the scale factor, is explicitly done for different choices of potential. The cases that mimetic matter model shows the evo... |
0803.0151 | Eugen Simanek | Eugen Simanek | Gravitational Field of a Spinning Cosmic String | 14 pages | Phys.Rev.D78:045014,2008 | 10.1103/PhysRevD.78.045014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effect of internal space rotation on the gravitational
properties of infinite straight and stationary cosmic string. From the
approximate solution of Einsten equations for the spinning Q-lump string we
obtain long range gravitational accelleration resembling that of a rotating
massive cylindrical shell. ... | [
{
"created": "Sun, 2 Mar 2008 22:22:54 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Mar 2008 21:01:03 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Simanek",
"Eugen",
""
]
] | We study the effect of internal space rotation on the gravitational properties of infinite straight and stationary cosmic string. From the approximate solution of Einsten equations for the spinning Q-lump string we obtain long range gravitational accelleration resembling that of a rotating massive cylindrical shell. We... |
0802.0720 | Rafael Porto | Rafael A. Porto and Ira Z. Rothstein | Spin(1)Spin(2) Effects in the Motion of Inspiralling Compact Binaries at
Third Order in the Post-Newtonian Expansion | 31 pages, 3 figures. v4: All the irrelevant (spin-independent) terms
in eqs (22) and (23) are now omitted, as in eqs (24) and (25), to avoid any
possible confusion regarding the self-consistency of the tetrad ('ee=g'). The
procedure and results in the paper are unaltered | Phys.Rev.D78:044012,2008; Erratum-ibid.D81:029904,2010 | 10.1103/PhysRevD.78.044012 10.1103/PhysRevD.81.029904 | null | gr-qc astro-ph hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use effective field theory techniques to compute the potentials due to
spin-spin and spin-orbit effects, from which the spin(1)spin(2) contribution to
the motion of spinning compact binaries to third Post-Newtonian (PN) order
follow. We use a formalism which allows us to impose the spin supplementarity
condition (... | [
{
"created": "Wed, 6 Feb 2008 19:49:42 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Apr 2008 22:29:11 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Jul 2008 16:53:33 GMT",
"version": "v3"
},
{
"created": "Wed, 1 Apr 2009 14:08:09 GMT",
"version": "v4"
}
] | 2014-11-18 | [
[
"Porto",
"Rafael A.",
""
],
[
"Rothstein",
"Ira Z.",
""
]
] | We use effective field theory techniques to compute the potentials due to spin-spin and spin-orbit effects, from which the spin(1)spin(2) contribution to the motion of spinning compact binaries to third Post-Newtonian (PN) order follow. We use a formalism which allows us to impose the spin supplementarity condition (SS... |
gr-qc/9706027 | Theodore A. Jacobson | Ingemar Bengtsson and Ted Jacobson | Degenerate Metric Phase Boundaries | 16 pages, 2 figures; erratum included in separate file: errors in
section 4, degenerate phase boundary is null without imposing field equations | Class.Quant.Grav. 14 (1997) 3109-3121; Erratum-ibid. 15 (1998)
3941-3942 | 10.1088/0264-9381/15/12/022 | UMDGR-97-112 | gr-qc hep-th | null | The structure of boundaries between degenerate and nondegenerate solutions of
Ashtekar's canonical reformulation of Einstein's equations is studied. Several
examples are given of such "phase boundaries" in which the metric is degenerate
on one side of a null hypersurface and non-degenerate on the other side. These
in... | [
{
"created": "Tue, 10 Jun 1997 19:31:26 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Jan 1999 01:38:16 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Bengtsson",
"Ingemar",
""
],
[
"Jacobson",
"Ted",
""
]
] | The structure of boundaries between degenerate and nondegenerate solutions of Ashtekar's canonical reformulation of Einstein's equations is studied. Several examples are given of such "phase boundaries" in which the metric is degenerate on one side of a null hypersurface and non-degenerate on the other side. These incl... |
0906.4091 | Yongsung Yoon | Yongsung Yoon | Dark Energy Regulation with Approximate Emergent Conformal Symmetry | revised version | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A cosmic potential which can relax the vacuum energy is proposed in a
framework of scalar-tensor gravity. In the phase of the gravity scalar field
around the evolution with an approximate emergent conformal symmetry, we have
obtained a set of cosmological equations with the dark energy regulated to the
order of a con... | [
{
"created": "Mon, 22 Jun 2009 18:27:38 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jun 2009 19:06:41 GMT",
"version": "v2"
},
{
"created": "Sun, 28 Jun 2009 15:00:43 GMT",
"version": "v3"
},
{
"created": "Mon, 12 Aug 2013 08:50:41 GMT",
"version": "v4"
},
{
"c... | 2013-08-30 | [
[
"Yoon",
"Yongsung",
""
]
] | A cosmic potential which can relax the vacuum energy is proposed in a framework of scalar-tensor gravity. In the phase of the gravity scalar field around the evolution with an approximate emergent conformal symmetry, we have obtained a set of cosmological equations with the dark energy regulated to the order of a confo... |
2101.05199 | Behzad Tajahmad | Behzad Tajahmad, Hossein Motavalli | Phase space of multi-fluid universe in $F(T)$-gravity and some
enhancements for the oscillating interaction model | null | null | 10.1140/epjc/s10052-021-08871-w | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, a Friedmann-Robertson-Walker universe filled with various
cosmological fluids has been considered by S.D. Odintsov et al. in [30] from
phase space vantage point where various expressions for the Equation-of-State
(EoS) parameter were studied. Since these types of EoS parameters are
generative of appreciable... | [
{
"created": "Wed, 13 Jan 2021 17:18:20 GMT",
"version": "v1"
}
] | 2021-02-24 | [
[
"Tajahmad",
"Behzad",
""
],
[
"Motavalli",
"Hossein",
""
]
] | Recently, a Friedmann-Robertson-Walker universe filled with various cosmological fluids has been considered by S.D. Odintsov et al. in [30] from phase space vantage point where various expressions for the Equation-of-State (EoS) parameter were studied. Since these types of EoS parameters are generative of appreciable r... |
1011.3184 | Zou De Cheng | De-Cheng Zou, Zhan-Ying Yang, Rui-Hong Yue and Peng Li | Thermodynamics of Gauss-Bonnet-Born-Infeld black holes in AdS space | 17 pages, 12 figures, Mod. Phys. Lett. A in press | Mod.Phys.Lett.A26:515-529,2011 | 10.1142/S0217732311034724 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct solutions of a model which includes the Gauss-Bonnet and
Born-Infeld terms for various horizon topologies $(k=0, \pm 1)$, and then the
mass, temperature, entropy and heat capacity of black holes are computed. For
the sake of simplicity, we perform the stability analysis of five dimensional
topological bl... | [
{
"created": "Sun, 14 Nov 2010 04:24:29 GMT",
"version": "v1"
}
] | 2011-10-04 | [
[
"Zou",
"De-Cheng",
""
],
[
"Yang",
"Zhan-Ying",
""
],
[
"Yue",
"Rui-Hong",
""
],
[
"Li",
"Peng",
""
]
] | We construct solutions of a model which includes the Gauss-Bonnet and Born-Infeld terms for various horizon topologies $(k=0, \pm 1)$, and then the mass, temperature, entropy and heat capacity of black holes are computed. For the sake of simplicity, we perform the stability analysis of five dimensional topological blac... |
2112.12013 | Jani Dahl | Jani Dahl, Mark Hindmarsh, Kari Rummukainen and David Weir | Decay of acoustic turbulence in two dimensions and implications for
cosmological gravitational waves | 23 pages, 22 figures | Phys. Rev. D 106, 063511 (2022) | 10.1103/PhysRevD.106.063511 | HIP-2021-29/TH | gr-qc hep-ph physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves from a phase transition associated with the generation of
the masses of elementary particles are within the reach of future space-based
detectors such as LISA. A key determinant of the resulting power spectrum, not
previously studied, is the lifetime of the acoustic turbulence which follows.
We st... | [
{
"created": "Sun, 19 Dec 2021 13:42:17 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Oct 2022 10:47:56 GMT",
"version": "v2"
}
] | 2022-10-18 | [
[
"Dahl",
"Jani",
""
],
[
"Hindmarsh",
"Mark",
""
],
[
"Rummukainen",
"Kari",
""
],
[
"Weir",
"David",
""
]
] | Gravitational waves from a phase transition associated with the generation of the masses of elementary particles are within the reach of future space-based detectors such as LISA. A key determinant of the resulting power spectrum, not previously studied, is the lifetime of the acoustic turbulence which follows. We stud... |
1507.08300 | Zoltan Keresztes | Zolt\'an Keresztes, Mats Forsberg, Michael Bradley, Peter K.S. Dunsby,
L\'aszl\'o \'A. Gergely | Gravitational, shear and matter waves in Kantowski-Sachs cosmologies | null | J. Cosmol. Astropart. Phys. (JCAP) 11 (2015) 042 | 10.1088/1475-7516/2015/11/042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general treatment of vorticity-free, perfect fluid perturbations of
Kantowski-Sachs models with a positive cosmological constant are considered
within the framework of the 1+1+2 covariant decomposition of spacetime. The
dynamics is encompassed in six evolution equations for six harmonic
coefficients, describing gra... | [
{
"created": "Wed, 29 Jul 2015 20:21:08 GMT",
"version": "v1"
},
{
"created": "Sat, 5 Dec 2015 23:21:58 GMT",
"version": "v2"
}
] | 2015-12-08 | [
[
"Keresztes",
"Zoltán",
""
],
[
"Forsberg",
"Mats",
""
],
[
"Bradley",
"Michael",
""
],
[
"Dunsby",
"Peter K. S.",
""
],
[
"Gergely",
"László Á.",
""
]
] | A general treatment of vorticity-free, perfect fluid perturbations of Kantowski-Sachs models with a positive cosmological constant are considered within the framework of the 1+1+2 covariant decomposition of spacetime. The dynamics is encompassed in six evolution equations for six harmonic coefficients, describing gravi... |
1509.00937 | Hyerim Noh | Hyerim Noh, Jai-chan Hwang, Chan-Gyung Park | Axion as a cold dark matter candidate: Analysis to third order
perturbation for classical axion | 16 pages, no figures | null | 10.1088/1475-7516/2015/12/016 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate aspects of axion as a coherently oscillating massive classical
scalar field by analyzing third order perturbations in Einstein's gravity in
the axion-comoving gauge. The axion fluid has its characteristic pressure term
leading to an axion Jeans scale which is cosmologically negligible for a
canonical a... | [
{
"created": "Thu, 3 Sep 2015 03:52:50 GMT",
"version": "v1"
}
] | 2015-12-16 | [
[
"Noh",
"Hyerim",
""
],
[
"Hwang",
"Jai-chan",
""
],
[
"Park",
"Chan-Gyung",
""
]
] | We investigate aspects of axion as a coherently oscillating massive classical scalar field by analyzing third order perturbations in Einstein's gravity in the axion-comoving gauge. The axion fluid has its characteristic pressure term leading to an axion Jeans scale which is cosmologically negligible for a canonical axi... |
2307.09976 | Dhruba Jyoti Gogoi Dr. | Dhruba Jyoti Gogoi, N. Heidari, J. K\v{r}\'i\v{z} and H. Hassanabadi | Quasinormal Modes and Greybody factors of de Sitter Black holes
surrounded by Quintessence in Rastall gravity | 17 pages, 12 figures | Fortschritte der Physik 72, 2300245 (2024) | 10.1002/prop.202300245 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work, we have studied the quasinormal mode, greybody factors, and
absorption cross section of de Sitter Reissner-Nordstr\"om black hole
surrounded by quintessence field in Rastall gravity. The violation of
energy-momentum conservation has a non-linear effect on the quasinormal modes.
With an increase in the b... | [
{
"created": "Wed, 19 Jul 2023 13:32:06 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Mar 2024 21:00:08 GMT",
"version": "v2"
}
] | 2024-03-11 | [
[
"Gogoi",
"Dhruba Jyoti",
""
],
[
"Heidari",
"N.",
""
],
[
"Kříž",
"J.",
""
],
[
"Hassanabadi",
"H.",
""
]
] | In this work, we have studied the quasinormal mode, greybody factors, and absorption cross section of de Sitter Reissner-Nordstr\"om black hole surrounded by quintessence field in Rastall gravity. The violation of energy-momentum conservation has a non-linear effect on the quasinormal modes. With an increase in the bla... |
gr-qc/0405104 | Jose Geraldo Pereira | R. Aldrovandi, J. P. Beltran Almeida, J. G. Pereira | Cosmological Term and Fundamental Physics | RevTeX, 4 pages. Selected for Honorable Mention in the Annual Essay
Competition of the Gravity Research Foundation for the year 2004 | Int.J.Mod.Phys. D13 (2004) 2241-2248 | 10.1142/S0218271804006279 | null | gr-qc hep-th | null | A nonvanishing cosmological term in Einstein's equations implies a
nonvanishing spacetime curvature even in absence of any kind of matter. It
would, in consequence, affect many of the underlying kinematic tenets of
physical theory. The usual commutative spacetime translations of the Poincare'
group would be replaced ... | [
{
"created": "Wed, 19 May 2004 16:33:01 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Aldrovandi",
"R.",
""
],
[
"Almeida",
"J. P. Beltran",
""
],
[
"Pereira",
"J. G.",
""
]
] | A nonvanishing cosmological term in Einstein's equations implies a nonvanishing spacetime curvature even in absence of any kind of matter. It would, in consequence, affect many of the underlying kinematic tenets of physical theory. The usual commutative spacetime translations of the Poincare' group would be replaced by... |
2211.04500 | Lisa Mickel | Steffen Gielen and Lisa Mickel | Gauge-invariant perturbations at a quantum gravity bounce | 26 pages, 6 figures | Universe 9 (2023) 29 | 10.3390/universe9010029 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the dynamics of gauge-invariant scalar perturbations in cosmological
scenarios with a modified Friedmann equation, such as quantum gravity bouncing
cosmologies. We work within a separate universe approximation which captures
wavelengths larger than the cosmological horizon; this approximation has been
succes... | [
{
"created": "Tue, 8 Nov 2022 19:01:04 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Jan 2023 15:38:05 GMT",
"version": "v2"
}
] | 2023-03-02 | [
[
"Gielen",
"Steffen",
""
],
[
"Mickel",
"Lisa",
""
]
] | We study the dynamics of gauge-invariant scalar perturbations in cosmological scenarios with a modified Friedmann equation, such as quantum gravity bouncing cosmologies. We work within a separate universe approximation which captures wavelengths larger than the cosmological horizon; this approximation has been successf... |
2209.00954 | Bilel Hamil | B. Hamil and B. C. L\"utf\"uo\u{g}lu | The effect of modified dispersion relations on the thermodynamics of
Schwarzschild black hole surrounded by quintessence | 9 pages, 9 figures | Eur. Phys. J. Plus 137, 1124 (2022) | 10.1140/epjp/s13360-022-03336-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this manuscript, we investigate the effects of a modified dispersion
relation on the thermodynamics of Schwarzschild black hole surrounded by the
quintessence matter. We find that the MDR-correction states the same lower
bound on the horizon, while the quintessence matter specifies the upper bound
to the horizon d... | [
{
"created": "Fri, 2 Sep 2022 11:22:15 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Oct 2022 06:52:06 GMT",
"version": "v2"
}
] | 2022-10-14 | [
[
"Hamil",
"B.",
""
],
[
"Lütfüoğlu",
"B. C.",
""
]
] | In this manuscript, we investigate the effects of a modified dispersion relation on the thermodynamics of Schwarzschild black hole surrounded by the quintessence matter. We find that the MDR-correction states the same lower bound on the horizon, while the quintessence matter specifies the upper bound to the horizon dep... |
1508.04100 | Ali \"Ovg\"un | A. \"Ovg\"un | Entangled Particles Tunneling From a Schwarzschild Black Hole immersed
in an Electromagnetic Universe with GUP | 8 pages, 1 figure , minor corrections (The erroneous metric in eq.
(15) of ref.([45]) is corrected here), corrected typos | Int J Theor Phys (2016) 55:2919-2927 | 10.1007/s10773-016-2923-0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravity has exciting peculiarities on the Planck scale.The effect of
generalized uncertainty principle (GUP) to the entangled scalar/fermion
particles' tunneling from a Schwarzschild black hole immersed in an
electromagnetic Universe is investigated by the help of semi-classical
tunneling method. The quantum ... | [
{
"created": "Mon, 17 Aug 2015 18:11:03 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Dec 2015 17:55:09 GMT",
"version": "v2"
}
] | 2016-05-11 | [
[
"Övgün",
"A.",
""
]
] | Quantum gravity has exciting peculiarities on the Planck scale.The effect of generalized uncertainty principle (GUP) to the entangled scalar/fermion particles' tunneling from a Schwarzschild black hole immersed in an electromagnetic Universe is investigated by the help of semi-classical tunneling method. The quantum co... |
gr-qc/0001097 | Orfeu Bertolami | O. Bertolami | On the spontaneous breaking of Lorentz invariance | 9 pages, Latex (requires mprocl.sty file available at
http://www.aei-potsdam.mpg.de/~cavaglia/qg99/proceedings.html). Invited talk
delivered at the Third Meeting on Constrained Dynamics and Quantum Gravity,
Villasimius, Sardinia, September 1999 | Nucl.Phys.Proc.Suppl. 88 (2000) 49-56 | 10.1016/S0920-5632(00)00753-2 | null | gr-qc astro-ph hep-ph | null | We show that estimates of the Lorentz symmetry violation extracted from
ultra-high energy cosmic rays beyond the GZK cut-off set bounds on the
parameters of a Lorentz-violating extension of the Standard Model. Moreover, we
argue that correlated measurements of the difference in the arrival time of
gamma-ray photons a... | [
{
"created": "Fri, 28 Jan 2000 15:19:08 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Bertolami",
"O.",
""
]
] | We show that estimates of the Lorentz symmetry violation extracted from ultra-high energy cosmic rays beyond the GZK cut-off set bounds on the parameters of a Lorentz-violating extension of the Standard Model. Moreover, we argue that correlated measurements of the difference in the arrival time of gamma-ray photons and... |
0811.2279 | Yun Soo Myung | Yong-Wan Kim, Hyung Won Lee, Yun Soo Myung | Entropy bound of local quantum field theory with generalized uncertainty
principle | 11 pages, 1figure, version to appear in PLB | Phys.Lett.B673:293-296,2009 | 10.1016/j.physletb.2009.02.042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the entropy bound for local quantum field theory (LQFT) with
generalized uncertainty principle. The generalized uncertainty principle
provides naturally a UV cutoff to the LQFT as gravity effects.
Imposing the non-gravitational collapse condition as the UV-IR relation, we
find that the maximal entropy of a... | [
{
"created": "Fri, 14 Nov 2008 07:37:21 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Feb 2009 05:56:44 GMT",
"version": "v2"
}
] | 2009-03-24 | [
[
"Kim",
"Yong-Wan",
""
],
[
"Lee",
"Hyung Won",
""
],
[
"Myung",
"Yun Soo",
""
]
] | We study the entropy bound for local quantum field theory (LQFT) with generalized uncertainty principle. The generalized uncertainty principle provides naturally a UV cutoff to the LQFT as gravity effects. Imposing the non-gravitational collapse condition as the UV-IR relation, we find that the maximal entropy of a bos... |
1112.3596 | Massimiliano Rinaldi | Massimiliano Rinaldi | The entropy of an acoustic black hole in Bose-Einstein condensates:
transverse modes as a cure for divergences | Version accepted for publication on International Journal of Modern
Physics D | International Journal of Modern Physics D, Vol. 22, No. 4 (2013)
1350016 | 10.1142/S0218271813500168 | null | gr-qc cond-mat.quant-gas hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the entropy associated to the phonons generated via the Hawking
mechanism in a sonic hole in a Bose-Einsten condensate. In a previous paper, we
looked at the (1+1)-dimensional case both in the hydrodynamic limit and in the
case when high-frequency dispersion is taken in account. Here, we extend the
analys... | [
{
"created": "Thu, 15 Dec 2011 18:32:08 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Jan 2012 10:29:47 GMT",
"version": "v2"
},
{
"created": "Fri, 13 Apr 2012 15:57:37 GMT",
"version": "v3"
},
{
"created": "Mon, 13 Aug 2012 18:36:28 GMT",
"version": "v4"
},
{
"c... | 2013-03-20 | [
[
"Rinaldi",
"Massimiliano",
""
]
] | We consider the entropy associated to the phonons generated via the Hawking mechanism in a sonic hole in a Bose-Einsten condensate. In a previous paper, we looked at the (1+1)-dimensional case both in the hydrodynamic limit and in the case when high-frequency dispersion is taken in account. Here, we extend the analysis... |
1011.2768 | Jose' P. S. Lemos | Jos\'e P. S. Lemos, Oleg B. Zaslavskii | Entropy of extremal black holes from entropy of quasiblack holes | 6 pages, minor corrections | Phys.Lett.B695:37-40,2011 | 10.1016/j.physletb.2010.11.033 | null | gr-qc astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The entropy of extremal black holes (BHs) is obtained using a continuity
argument from extremal quasiblack holes (QBHs). It is shown that there exists a
smooth limiting transition in which (i) the system boundary approaches the
extremal Reissner-Nordstr\"{o}m (RN) horizon, (ii) the temperature at infinity
tends to ze... | [
{
"created": "Thu, 11 Nov 2010 21:03:42 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jan 2011 20:47:16 GMT",
"version": "v2"
}
] | 2011-05-25 | [
[
"Lemos",
"José P. S.",
""
],
[
"Zaslavskii",
"Oleg B.",
""
]
] | The entropy of extremal black holes (BHs) is obtained using a continuity argument from extremal quasiblack holes (QBHs). It is shown that there exists a smooth limiting transition in which (i) the system boundary approaches the extremal Reissner-Nordstr\"{o}m (RN) horizon, (ii) the temperature at infinity tends to zero... |
gr-qc/0612035 | Stefano Ansoldi | Stefano Ansoldi, Piero Nicolini, Anais Smailagic and Euro Spallucci | Noncommutative geometry inspired charged black holes | 14 pages, 9 figure, LaTeX | Phys.Lett.B645:261-266,2007 | 10.1016/j.physletb.2006.12.020 | null | gr-qc hep-th | null | We find a new, non-commutative geometry inspired, solution of the coupled
Einstein-Maxwell field equations describing a variety of charged,
self-gravitating objects, including extremal and non-extremal black holes. The
metric smoothly interpolates between deSitter geometry, at short distance, and
Reissner-Nordstroem ... | [
{
"created": "Wed, 6 Dec 2006 06:24:49 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ansoldi",
"Stefano",
""
],
[
"Nicolini",
"Piero",
""
],
[
"Smailagic",
"Anais",
""
],
[
"Spallucci",
"Euro",
""
]
] | We find a new, non-commutative geometry inspired, solution of the coupled Einstein-Maxwell field equations describing a variety of charged, self-gravitating objects, including extremal and non-extremal black holes. The metric smoothly interpolates between deSitter geometry, at short distance, and Reissner-Nordstroem ge... |
2307.10199 | Jie Du | Yuewen Chen, Jie Du, Shing-Tung Yau | New solution of Einstein-Yang-Mills equations | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we show the numerical solution for spherically symmetric SU(2)
EinsteinYang-Mills (EYM) equations. We show the existence of entropy weak
solution for EYM.
| [
{
"created": "Wed, 12 Jul 2023 13:10:08 GMT",
"version": "v1"
}
] | 2023-07-21 | [
[
"Chen",
"Yuewen",
""
],
[
"Du",
"Jie",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | In this paper, we show the numerical solution for spherically symmetric SU(2) EinsteinYang-Mills (EYM) equations. We show the existence of entropy weak solution for EYM. |
2302.00373 | Bibhas Majhi Ranjan | Abhinove Nagarajan Seenivasan, Sayan Chakrabarti, Bibhas Ranjan Majhi | Scalar fluid in scalar-tensor gravity from an equivalent picture of
thermodynamic and fluid descriptions of gravitational dynamics | Comments added, published in Phys. Rev. D | Phys.Rev.D 107 (2023) 10, 104027 | 10.1103/PhysRevD.107.104027 | null | gr-qc hep-th physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the thermodynamic description of fluid, represented by scalar
field in scalar-tensor gravity theory through a general approach to study the
thermodynamics of relativistic fluids. In order to identify the fluid
energy-momentum tensor, contrary to the existing way, we use equivalent
description of gravitatio... | [
{
"created": "Wed, 1 Feb 2023 11:05:54 GMT",
"version": "v1"
},
{
"created": "Mon, 15 May 2023 12:50:19 GMT",
"version": "v2"
}
] | 2023-05-16 | [
[
"Seenivasan",
"Abhinove Nagarajan",
""
],
[
"Chakrabarti",
"Sayan",
""
],
[
"Majhi",
"Bibhas Ranjan",
""
]
] | We revisit the thermodynamic description of fluid, represented by scalar field in scalar-tensor gravity theory through a general approach to study the thermodynamics of relativistic fluids. In order to identify the fluid energy-momentum tensor, contrary to the existing way, we use equivalent description of gravitationa... |
1204.3977 | Olivier Sarbach | Olivier Sarbach and Thomas Zannias | The propagation of particles and fields in wormhole geometries | 10 pages, 2 figures, prepared for the proceedings of the IX Workshop
of Gravitational and Mathematical Physics Division of the Mexican Physical
Society | AIP Conf.Proc. 1473 (2012) 223-232 | 10.1063/1.4748557 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss several properties of static, spherically symmetric wormholes with
particular emphasis on the behavior of causal geodesics and the propagation of
linear fields. We show there always exist null geodesics which are trapped in a
region close to the throat. Depending upon the detailed structure of the
wormhole... | [
{
"created": "Wed, 18 Apr 2012 05:37:37 GMT",
"version": "v1"
}
] | 2014-06-17 | [
[
"Sarbach",
"Olivier",
""
],
[
"Zannias",
"Thomas",
""
]
] | We discuss several properties of static, spherically symmetric wormholes with particular emphasis on the behavior of causal geodesics and the propagation of linear fields. We show there always exist null geodesics which are trapped in a region close to the throat. Depending upon the detailed structure of the wormhole g... |
2401.02907 | David McNutt | D. D. McNutt, A. A. Coley, and R. J. van den Hoogen | Locally-homogeneous Riemann-Cartan geometries with the largest symmetry
group | 41 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The symmetry frame formalism is an effective tool for computing the
symmetries of a Riemann-Cartan geometry and, in particular, in metric
teleparallel geometries. In the case of non-vanishing torsion in a four
dimensional Riemann-Cartan geometry, the Minkowski geometry is the only
geometry admitting ten affine frame ... | [
{
"created": "Fri, 5 Jan 2024 17:05:47 GMT",
"version": "v1"
},
{
"created": "Sun, 14 Jan 2024 12:36:13 GMT",
"version": "v2"
}
] | 2024-01-17 | [
[
"McNutt",
"D. D.",
""
],
[
"Coley",
"A. A.",
""
],
[
"Hoogen",
"R. J. van den",
""
]
] | The symmetry frame formalism is an effective tool for computing the symmetries of a Riemann-Cartan geometry and, in particular, in metric teleparallel geometries. In the case of non-vanishing torsion in a four dimensional Riemann-Cartan geometry, the Minkowski geometry is the only geometry admitting ten affine frame sy... |
gr-qc/0504041 | Joseph Katz | Joseph Katz, Jiri Bicak and Donald Lynden-Bell | Relativistic conservation laws and integral constraints for large
cosmological perturbations | This paper, published 7 years ago, was found useful by some
researchers but originally was not put on the gr-qc website. Now it has been
retyped with very minor changes: few wordings have been modified and several
misprints occurring in the printed version corrected | Phys.Rev. D55 (1997) 5957-5969 | 10.1103/PhysRevD.55.5957 | null | gr-qc | null | For every mapping of a perturbed spacetime onto a background and with any
vector field $\xi$ we construct a conserved covariant vector density $I(\xi)$,
which is the divergence of a covariant antisymmetric tensor density, a
"superpotential". $ I(\xi)$ is linear in the energy-momentum tensor
perturbations of matter, w... | [
{
"created": "Sat, 9 Apr 2005 15:32:36 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Katz",
"Joseph",
""
],
[
"Bicak",
"Jiri",
""
],
[
"Lynden-Bell",
"Donald",
""
]
] | For every mapping of a perturbed spacetime onto a background and with any vector field $\xi$ we construct a conserved covariant vector density $I(\xi)$, which is the divergence of a covariant antisymmetric tensor density, a "superpotential". $ I(\xi)$ is linear in the energy-momentum tensor perturbations of matter, whi... |
2206.09653 | Ettore Minguzzi | A. Garcia-Parrado and E. Minguzzi | An anisotropic gravity theory | Latex, 15 pages. v2: we fixed some typos and added two more
appendices with proofs of formulas used in the work. To appear in the topical
volume `Singularity theorems, causality, and all that (SCRI21)'
https://link.springer.com/collections/hjjgajaagg | General Relativity and Gravitation 54 (2022) 150 | 10.1007/s10714-022-03039-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study an action integral for Finsler gravity obtained by pulling back an
Einstein-Cartan-like Lagrangian from the tangent bundle to the base manifold.
The vacuum equations are obtained imposing stationarity with respect to any
section (observer) and are well posed as they are independent of the section.
They imply... | [
{
"created": "Mon, 20 Jun 2022 09:00:00 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Nov 2022 15:09:17 GMT",
"version": "v2"
}
] | 2022-11-29 | [
[
"Garcia-Parrado",
"A.",
""
],
[
"Minguzzi",
"E.",
""
]
] | We study an action integral for Finsler gravity obtained by pulling back an Einstein-Cartan-like Lagrangian from the tangent bundle to the base manifold. The vacuum equations are obtained imposing stationarity with respect to any section (observer) and are well posed as they are independent of the section. They imply t... |
gr-qc/9908009 | Angelo Loinger | A.Loinger (Dipartimento di Fisica, Universita' di Milano, Italy) | Revisiting the Einstein field of a mass point | 6 pages, PDF from MS-Word97 | null | null | null | gr-qc astro-ph | null | The Einstein gravitational field of a material point at rest is derived anew
- by a suitable limit process - from the field of a sphere of a homogeneous and
incompressible fluid. This result supports clearly the thesis according to
which the physically interesting singularities must correspond to the presence
of matt... | [
{
"created": "Tue, 3 Aug 1999 09:52:06 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Loinger",
"A.",
"",
"Dipartimento di Fisica, Universita' di Milano, Italy"
]
] | The Einstein gravitational field of a material point at rest is derived anew - by a suitable limit process - from the field of a sphere of a homogeneous and incompressible fluid. This result supports clearly the thesis according to which the physically interesting singularities must correspond to the presence of matter... |
gr-qc/0503009 | Denis Gonta | Denis Gonta | Effective Equations on the 3-Brane World from Type IIB String | Revtex4 file, 28 pages; Int. J. Mod. Phys. A, in press | Int.J.Mod.Phys. A21 (2006) 83-108 | 10.1142/S0217751X06024281 | null | gr-qc | null | The effective field equations on a 3-brane are established considering the
massless bosonic sector of the type IIB string compactified on S^5. The
covariant embedding formalism in a space endowed with Z_2-symmetry is applied.
Recently the derivation of effective equations on the 3-brane, where only
gravity penetrates... | [
{
"created": "Wed, 2 Mar 2005 19:07:12 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Mar 2005 03:58:34 GMT",
"version": "v2"
},
{
"created": "Sun, 11 Sep 2005 22:59:06 GMT",
"version": "v3"
},
{
"created": "Wed, 9 Nov 2005 20:24:39 GMT",
"version": "v4"
}
] | 2009-11-11 | [
[
"Gonta",
"Denis",
""
]
] | The effective field equations on a 3-brane are established considering the massless bosonic sector of the type IIB string compactified on S^5. The covariant embedding formalism in a space endowed with Z_2-symmetry is applied. Recently the derivation of effective equations on the 3-brane, where only gravity penetrates i... |
1312.0734 | Luis Herrera | L. Herrera | Radiation and vorticity: The missing link | 11 pages, Latex. To appear in Gen. Rel. Grav | Gen. Rel. Grav. 46, 1654, (2014) | 10.1007/s10714-013-1654-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of General Relativity, radiation, either gravitational or
electromagnetic, is closely associated to vorticity of observers world lines.
We stress in this letter that the factor that relates the two phenomena is a
circular flow of energy (electromagnetic) and/or superenergy on the planes
orthogonal to v... | [
{
"created": "Tue, 3 Dec 2013 08:58:30 GMT",
"version": "v1"
}
] | 2013-12-24 | [
[
"Herrera",
"L.",
""
]
] | In the context of General Relativity, radiation, either gravitational or electromagnetic, is closely associated to vorticity of observers world lines. We stress in this letter that the factor that relates the two phenomena is a circular flow of energy (electromagnetic) and/or superenergy on the planes orthogonal to vor... |
1302.5702 | Emanuele Berti | Emanuele Berti | Astrophysical black holes as natural laboratories for fundamental
physics and strong-field gravity | 17 pages, 3 figures, prepared for the Proceedings of the 26th Texas
Symposium on Relativistic Astrophysics; revision fixes typos in response to
referee's comments, some references added | null | 10.1007/s13538-013-0128-z | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Astrophysical tests of general relativity belong to two categories: 1)
"internal", i.e. consistency tests within the theory (for example, tests that
astrophysical black holes are indeed described by the Kerr solution and its
perturbations), or 2) "external", i.e. tests of the many proposed extensions of
the theory. I... | [
{
"created": "Fri, 22 Feb 2013 21:00:04 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Mar 2013 00:14:57 GMT",
"version": "v2"
}
] | 2015-06-15 | [
[
"Berti",
"Emanuele",
""
]
] | Astrophysical tests of general relativity belong to two categories: 1) "internal", i.e. consistency tests within the theory (for example, tests that astrophysical black holes are indeed described by the Kerr solution and its perturbations), or 2) "external", i.e. tests of the many proposed extensions of the theory. I r... |
2101.02012 | Jorge L. deLyra | Jorge L. deLyra, Rodrigo de A. Orselli, C. E. I. Carneiro
(Universidade de S\~ao Paulo, Instituto de F\'isica, S\~ao Paulo, SP, Brazil) | Exact Solution of the Einstein Field Equations for a Spherical Shell of
Fluid Matter | 21 pages, 4 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We determine the exact solution of the Einstein field equations for the case
of a spherically symmetric shell of liquid matter, characterized by an energy
density which is constant with the Schwarzschild radial coordinate $r$ between
two values $r_{1}$ and $r_{2}$. The solution is given in three regions, one
being th... | [
{
"created": "Mon, 4 Jan 2021 23:00:06 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Apr 2021 02:07:12 GMT",
"version": "v2"
}
] | 2021-04-16 | [
[
"deLyra",
"Jorge L.",
"",
"Universidade de São Paulo, Instituto de Física, São Paulo, SP, Brazil"
],
[
"Orselli",
"Rodrigo de A.",
"",
"Universidade de São Paulo, Instituto de Física, São Paulo, SP, Brazil"
],
[
"Carneiro",
"C. E. I.",
"",
"Universidade de S... | We determine the exact solution of the Einstein field equations for the case of a spherically symmetric shell of liquid matter, characterized by an energy density which is constant with the Schwarzschild radial coordinate $r$ between two values $r_{1}$ and $r_{2}$. The solution is given in three regions, one being the ... |
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