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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0702067 | Hamid Reza Sepangi | N. Khosravi, S. Jalalzadeh and H. R. Sepangi | Quantum noncommutative multidimensional cosmology | 10 pages, 1 figure, to appear in GRG | Gen.Rel.Grav.39:899-911,2007 | 10.1007/s10714-007-0429-z | null | gr-qc hep-th | null | We present exact quantum solutions for a noncommutative, multidimensional
cosmological model and show that stabilization of extra dimensions sets in with
the introduction of noncommutativity between the scale factors. An
interpretation is offered to accommodate the notion of time, rendering
comparison with the classi... | [
{
"created": "Mon, 12 Feb 2007 10:30:02 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Khosravi",
"N.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | We present exact quantum solutions for a noncommutative, multidimensional cosmological model and show that stabilization of extra dimensions sets in with the introduction of noncommutativity between the scale factors. An interpretation is offered to accommodate the notion of time, rendering comparison with the classica... |
2007.04197 | Xiao-Mei Kuang | Hong Guo, Hang Liu, Xiao-Mei Kuang, Bin Wang | Acoustic black hole in Schwarzschild spacetime: quasi-normal modes,
analogous Hawking radiation and shadows | 19 pages,9 figures;published version | Phys. Rev. D 102, 124019 (2020) | 10.1103/PhysRevD.102.124019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Various properties of acoustic black holes constructed in Minkowski spacetime
have been widely studied in the past decades. Recently the acoustic black holes
in general spacetime were proposed . In this paper, we first investigate the
basic characteristics of `curved' acoustic black hole in Schwarzschild
spacetime, i... | [
{
"created": "Wed, 8 Jul 2020 15:38:41 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Dec 2020 08:53:55 GMT",
"version": "v2"
}
] | 2021-01-04 | [
[
"Guo",
"Hong",
""
],
[
"Liu",
"Hang",
""
],
[
"Kuang",
"Xiao-Mei",
""
],
[
"Wang",
"Bin",
""
]
] | Various properties of acoustic black holes constructed in Minkowski spacetime have been widely studied in the past decades. Recently the acoustic black holes in general spacetime were proposed . In this paper, we first investigate the basic characteristics of `curved' acoustic black hole in Schwarzschild spacetime, inc... |
1511.01422 | Rafael M. Rubio | Juan A. Aledo, Rafael M. Rubio | Scalar curvature of spacelike hypersurfaces and certain class of
cosmological models for accelerated expanding universes | arXiv admin note: text overlap with arXiv:1503.00120 | null | 10.1016/j.geomphys.2016.02.005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the scalar curvature of spacelike hypersurfaces in the family of
cosmological models known as generalized Robertson-Walker spacetimes, and give
several rigidity results under appropriate mathematical and physical
assumptions. On the other hand, we show that this family of spacetimes provides
suitable models ... | [
{
"created": "Wed, 4 Nov 2015 18:22:31 GMT",
"version": "v1"
}
] | 2016-03-23 | [
[
"Aledo",
"Juan A.",
""
],
[
"Rubio",
"Rafael M.",
""
]
] | We study the scalar curvature of spacelike hypersurfaces in the family of cosmological models known as generalized Robertson-Walker spacetimes, and give several rigidity results under appropriate mathematical and physical assumptions. On the other hand, we show that this family of spacetimes provides suitable models ob... |
1603.02259 | Alberto S\'anchez | Alberto Sanchez | Geometrothermodynamics of black holes in Lorentz non-invariant massive
gravity | 16 latex pages, 8 figures | Phys. Rev. D 94, 024037 (2016) | 10.1103/PhysRevD.94.024037 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze a static and spherically symmetric hairy black hole solution in
non-invariant massive gravity. The formalism of geometrothermodynamics is used
to describe the thermodynamic characteristics of this black hole in a Legendre
invariant way. For a black hole in massive gravity, the geometry of the space
of equi... | [
{
"created": "Sat, 5 Mar 2016 17:40:41 GMT",
"version": "v1"
}
] | 2016-07-27 | [
[
"Sanchez",
"Alberto",
""
]
] | We analyze a static and spherically symmetric hairy black hole solution in non-invariant massive gravity. The formalism of geometrothermodynamics is used to describe the thermodynamic characteristics of this black hole in a Legendre invariant way. For a black hole in massive gravity, the geometry of the space of equili... |
gr-qc/9401018 | Neil Cornish | N. J. Cornish and J. W. Moffat | Nonsymmetric Gravity Does Have Acceptable Global Asymptotics | 7 pages, UT-PT-94-01. Our original arguments have been expanded upon
and generalised | null | null | null | gr-qc | null | ``Reports of my death are greatly exaggerated''
- Mark Twain. We consider the claim by Damour, Deser and McCarthy that
nonsymmetric gravity theory has unacceptable global asymptotics. We explain why
this claim is incorrect.
| [
{
"created": "Tue, 18 Jan 1994 23:26:35 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Mar 1994 23:41:28 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Cornish",
"N. J.",
""
],
[
"Moffat",
"J. W.",
""
]
] | ``Reports of my death are greatly exaggerated'' - Mark Twain. We consider the claim by Damour, Deser and McCarthy that nonsymmetric gravity theory has unacceptable global asymptotics. We explain why this claim is incorrect. |
2305.01116 | Jeffrey Hazboun | Jeffrey S. Hazboun and Patrick M. Meyers and Joseph D. Romano and
Xavier Siemens and Anne M. Archibald | Analytic distribution of the optimal cross-correlation statistic for
stochastic gravitational-wave-background searches using pulsar timing arrays | 13 pages, 3 Figures | null | null | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show via both analytical calculation and numerical simulation that the
optimal cross-correlation statistic (OS) for stochastic
gravitational-wave-background (GWB) searches using data from pulsar timing
arrays follows a generalized chi-squared (GX2) distribution-i.e., a linear
combination of chi-squared distributio... | [
{
"created": "Mon, 1 May 2023 23:04:55 GMT",
"version": "v1"
}
] | 2023-05-03 | [
[
"Hazboun",
"Jeffrey S.",
""
],
[
"Meyers",
"Patrick M.",
""
],
[
"Romano",
"Joseph D.",
""
],
[
"Siemens",
"Xavier",
""
],
[
"Archibald",
"Anne M.",
""
]
] | We show via both analytical calculation and numerical simulation that the optimal cross-correlation statistic (OS) for stochastic gravitational-wave-background (GWB) searches using data from pulsar timing arrays follows a generalized chi-squared (GX2) distribution-i.e., a linear combination of chi-squared distributions... |
gr-qc/0402064 | Alejandro Corichi | Alejandro Corichi | Comments on area spectra in Loop Quantum Gravity | 4 pages, no figures. Comments and references added | Rev.Mex.Fis. 50 (2005) 549-552 | null | ICN-UNAM-04/01 | gr-qc hep-th | null | We examine and compare different area spectra that have been recently
considered in Loop Quantum Gravity (LQG). In particular we focus our attention
on a Equally Spaced (ES) spectrum operator introduced by Alekseev et. al. that
has gained recent attention. We show that such operator is not well defined
within the LQG... | [
{
"created": "Fri, 13 Feb 2004 18:31:36 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Feb 2004 22:47:29 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Corichi",
"Alejandro",
""
]
] | We examine and compare different area spectra that have been recently considered in Loop Quantum Gravity (LQG). In particular we focus our attention on a Equally Spaced (ES) spectrum operator introduced by Alekseev et. al. that has gained recent attention. We show that such operator is not well defined within the LQG f... |
2207.13435 | S. N Sajadi | S. N. Sajadi, S. H. Hendi | Analytically Approximation Solution to Einstein-Cubic Gravity | 22 pages, 12 Figures, accepted in EPJC | null | 10.1140/epjc/s10052-022-10647-9 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work, we introduce an analytical approximate black hole solution in
Einstein-Cubic gravity. To obtain complete solutions, we construct the near
horizon and asymptotic solutions as the first step. Then, the approximate
analytic solutions are obtained through continued fraction expansion. We also
compute the th... | [
{
"created": "Wed, 27 Jul 2022 10:26:44 GMT",
"version": "v1"
}
] | 2022-08-24 | [
[
"Sajadi",
"S. N.",
""
],
[
"Hendi",
"S. H.",
""
]
] | In this work, we introduce an analytical approximate black hole solution in Einstein-Cubic gravity. To obtain complete solutions, we construct the near horizon and asymptotic solutions as the first step. Then, the approximate analytic solutions are obtained through continued fraction expansion. We also compute the ther... |
0807.2159 | Margus Saal | Laur Jarv, Piret Kuusk, Margus Saal | Scalar-tensor cosmologies: fixed points of the Jordan frame scalar field | 21 pages, 4 figures, some comments and references added | Phys.Rev.D78:083530,2008 | 10.1103/PhysRevD.78.083530 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evolution of homogeneous and isotropic, flat cosmological models
within the general scalar-tensor theory of gravity with arbitrary coupling
function and potential. After introducing the limit of general relativity we
describe the details of the phase space geometry. Using the methods of
dynamical systems... | [
{
"created": "Mon, 14 Jul 2008 13:17:50 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Oct 2008 14:03:42 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Jarv",
"Laur",
""
],
[
"Kuusk",
"Piret",
""
],
[
"Saal",
"Margus",
""
]
] | We study the evolution of homogeneous and isotropic, flat cosmological models within the general scalar-tensor theory of gravity with arbitrary coupling function and potential. After introducing the limit of general relativity we describe the details of the phase space geometry. Using the methods of dynamical systems f... |
2210.15684 | Jacopo Tissino | Jacopo Tissino, Gregorio Carullo, Matteo Breschi, Rossella Gamba,
Stefano Schmidt, Sebastiano Bernuzzi | Combining effective-one-body accuracy and reduced-order-quadrature speed
for binary neutron star merger parameter estimation with machine learning | 20 pages, 11 figures | null | 10.1103/PhysRevD.107.084037 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present mlgw-bns, a gravitational waveform surrogate that allows for a
significant improvement in the generation speed of frequency-domain waveforms
for binary neutron star mergers, at a negligible cost in accuracy. This
improvement is achieved by training a machine-learning model on a dataset of
waveforms generat... | [
{
"created": "Thu, 27 Oct 2022 18:00:01 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Nov 2022 17:13:15 GMT",
"version": "v2"
}
] | 2023-05-10 | [
[
"Tissino",
"Jacopo",
""
],
[
"Carullo",
"Gregorio",
""
],
[
"Breschi",
"Matteo",
""
],
[
"Gamba",
"Rossella",
""
],
[
"Schmidt",
"Stefano",
""
],
[
"Bernuzzi",
"Sebastiano",
""
]
] | We present mlgw-bns, a gravitational waveform surrogate that allows for a significant improvement in the generation speed of frequency-domain waveforms for binary neutron star mergers, at a negligible cost in accuracy. This improvement is achieved by training a machine-learning model on a dataset of waveforms generated... |
2402.02069 | Joshi Ashok B | Divyesh P. Viththani, Ashok B. Joshi, Tapobroto Bhanja and Pankaj S.
Joshi | Particle motion and tidal force in a non-vacuum-charged naked
singularity | 9 pages, 6 figures | null | 10.1140/epjc/s10052-024-12746-1 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this article, we investigate the gravitational field of a charged,
non-vacuum, non-rotating, spherically symmetric body of mass $M$ assuming a
static solution to the Einstein-Maxwell field equations. We demonstrate that
the characteristics of perihelion precession of orbits in Schwarzschild and
Null singularity sp... | [
{
"created": "Sat, 3 Feb 2024 07:18:19 GMT",
"version": "v1"
},
{
"created": "Sat, 13 Apr 2024 17:21:32 GMT",
"version": "v2"
}
] | 2024-04-16 | [
[
"Viththani",
"Divyesh P.",
""
],
[
"Joshi",
"Ashok B.",
""
],
[
"Bhanja",
"Tapobroto",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | In this article, we investigate the gravitational field of a charged, non-vacuum, non-rotating, spherically symmetric body of mass $M$ assuming a static solution to the Einstein-Maxwell field equations. We demonstrate that the characteristics of perihelion precession of orbits in Schwarzschild and Null singularity spac... |
gr-qc/0108048 | Shinji Mukohyama | Shinji Mukohyama | Doubly covariant action principle of singular hypersurfaces in general
relativity and scalar-tensor theories | Latex, 8 pages; version to appear in Physical Review D | Phys.Rev. D65 (2002) 024028 | 10.1103/PhysRevD.65.024028 | null | gr-qc hep-th | null | An action principle of singular hypersurfaces in general relativity and
scalar-tensor type theories of gravity in the Einstein frame is presented
without assuming any symmetry. The action principle is manifestly doubly
covariant in the sense that coordinate systems on and off a hypersurface are
disentangled and can b... | [
{
"created": "Sun, 19 Aug 2001 17:12:03 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Aug 2001 00:29:55 GMT",
"version": "v2"
},
{
"created": "Fri, 5 Oct 2001 03:10:49 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Mukohyama",
"Shinji",
""
]
] | An action principle of singular hypersurfaces in general relativity and scalar-tensor type theories of gravity in the Einstein frame is presented without assuming any symmetry. The action principle is manifestly doubly covariant in the sense that coordinate systems on and off a hypersurface are disentangled and can be ... |
gr-qc/9508057 | Erik A. Martinez | Erik A. Martinez | Entropy of eternal black holes | To appear in the proceedings of the Sixth Canadian Conference on
General Relativiy and Relativistic Astrophysics, 7 pages, Latex | null | null | Alberta-Thy-18-95 | gr-qc | null | The entropy of a quantum-statistical system which is classically approximated
by a general stationary eternal black hole is studied by means of a
microcanonical functional integral. This approach opens the possibility of
including explicitly the internal degrees of freedom of a physical black hole
in path integral de... | [
{
"created": "Mon, 28 Aug 1995 19:59:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Martinez",
"Erik A.",
""
]
] | The entropy of a quantum-statistical system which is classically approximated by a general stationary eternal black hole is studied by means of a microcanonical functional integral. This approach opens the possibility of including explicitly the internal degrees of freedom of a physical black hole in path integral desc... |
2208.14308 | Tobias Mistele | Tobias Mistele | A novel Cherenkov radiation constraint for hybrid MOND dark matter
models | 73 pages, 6 figures, minor changes | null | null | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified gravity models often contain modes that couple to normal matter and
propagate with slightly less than the speed of light. High-energy cosmic rays
then lose energy due to Cherenkov radiation, which constrains such models. This
is also true for some MOND (Modified Newtonian Dynamics) models. However, these
con... | [
{
"created": "Tue, 30 Aug 2022 14:47:54 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Sep 2022 09:24:48 GMT",
"version": "v2"
}
] | 2022-09-14 | [
[
"Mistele",
"Tobias",
""
]
] | Modified gravity models often contain modes that couple to normal matter and propagate with slightly less than the speed of light. High-energy cosmic rays then lose energy due to Cherenkov radiation, which constrains such models. This is also true for some MOND (Modified Newtonian Dynamics) models. However, these const... |
2007.12964 | Cesar Alonso Valenzuela Toledo | Alejandro Guarnizo, J. Bayron Orjuela-Quintana, C\'esar A.
Valenzuela-Toledo | Dynamical analysis of cosmological models with non-Abelian gauge vector
fields | 20 pages, 22 figures. V2: typos corrected and references added.
Published version | Phys. Rev. D 102, 083507 (2020) | 10.1103/PhysRevD.102.083507 | PI/UAN-2020-672FT | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study some models where non-Abelian gauge vector fields
endowed with a SU(2) group representation are the unique source of inflation
and dark energy. These models were first introduced under the name of
gaugeflation and gaugessence, respectively. Although several realizations of
these models have bee... | [
{
"created": "Sat, 25 Jul 2020 16:06:07 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Oct 2020 16:30:34 GMT",
"version": "v2"
}
] | 2020-10-13 | [
[
"Guarnizo",
"Alejandro",
""
],
[
"Orjuela-Quintana",
"J. Bayron",
""
],
[
"Valenzuela-Toledo",
"César A.",
""
]
] | In this paper we study some models where non-Abelian gauge vector fields endowed with a SU(2) group representation are the unique source of inflation and dark energy. These models were first introduced under the name of gaugeflation and gaugessence, respectively. Although several realizations of these models have been ... |
1604.06216 | Fatimah Shojai | F. Shojai, M. Kohandel, A. Stepanian | On the Relativistic anisotropic configurations | 4 figures | Eur. Phys. J. C (2016) 76: 347 | 10.1140/epjc/s10052-016-4204-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study anisotropic spherical polytropes within the framework
of general relativity. Using the anisotropic Tolman-Oppenheimer-Volkov (TOV)
equations, we explore the relativistic anisotropic Lane-Emden equations. We
find how the anisotropic pressure affects the boundary conditions of these
equations. Al... | [
{
"created": "Thu, 21 Apr 2016 08:49:04 GMT",
"version": "v1"
}
] | 2016-07-20 | [
[
"Shojai",
"F.",
""
],
[
"Kohandel",
"M.",
""
],
[
"Stepanian",
"A.",
""
]
] | In this paper we study anisotropic spherical polytropes within the framework of general relativity. Using the anisotropic Tolman-Oppenheimer-Volkov (TOV) equations, we explore the relativistic anisotropic Lane-Emden equations. We find how the anisotropic pressure affects the boundary conditions of these equations. Also... |
2109.09676 | Pujian Mao | Pujian Mao and Weicheng Zhao | Note on the asymptotic structure of Kerr-Schild form | v2: refs added, interpretations about several issues improved v3:
refs added, major revision, published in JHEP | JHEP 01 (2022) 030 | 10.1007/JHEP01(2022)030 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The Kerr-Schild form provides a natural way of realizing the classical double
copy that relates exact solutions in general relativity to exact solutions in
gauge theory. In this paper, we examine the asymptotic structure of Kerr-Schild
form. In Newman-Unti gauge, we find a generic solution space satisfying the
Kerr-S... | [
{
"created": "Mon, 20 Sep 2021 16:45:41 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Oct 2021 07:06:58 GMT",
"version": "v2"
},
{
"created": "Tue, 25 Jan 2022 13:33:45 GMT",
"version": "v3"
}
] | 2022-01-26 | [
[
"Mao",
"Pujian",
""
],
[
"Zhao",
"Weicheng",
""
]
] | The Kerr-Schild form provides a natural way of realizing the classical double copy that relates exact solutions in general relativity to exact solutions in gauge theory. In this paper, we examine the asymptotic structure of Kerr-Schild form. In Newman-Unti gauge, we find a generic solution space satisfying the Kerr-Sch... |
1511.01709 | Avirup Ghosh | Ayan Chatterjee, Avirup Ghosh | Quasilocal first law of black hole dynamics from local Lorentz
transformations | 7 pages, revised version | European Physical Journal C 78(7), July 2018 | 10.1140/epjc/s10052-018-6021-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasilocal formulations of black hole are of immense importance since they
reveal the essential and minimal assumptions required for a consistent
description of black hole horizon, without relying on the asymptotic boundary
conditions on fields. Using the quasilocal formulation of Isolated Horizons, we
construct the ... | [
{
"created": "Thu, 5 Nov 2015 12:02:16 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Jul 2018 14:58:51 GMT",
"version": "v2"
}
] | 2018-07-10 | [
[
"Chatterjee",
"Ayan",
""
],
[
"Ghosh",
"Avirup",
""
]
] | Quasilocal formulations of black hole are of immense importance since they reveal the essential and minimal assumptions required for a consistent description of black hole horizon, without relying on the asymptotic boundary conditions on fields. Using the quasilocal formulation of Isolated Horizons, we construct the Ha... |
1602.04215 | Alexander Burinskii | Alexander Burinskii | Source of the Kerr-Newman Solution as a Supersymmetric Domain-Wall
Bubble: 50 years of the problem | 5 pages, 3 figures | Physics Letters B 754 (2016) 99 | 10.1016/j.physletb.2016.01.017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the chiral field model of the source of the Kerr-Newman (KN)
solution and obtain that it represents a supersymmetric spinning soliton,
bounded by the chiral domain wall (DW) of the ellipsoidal form. The known
method for transformation of the planar DW to Bogomolnyi form we generalize to
the curved DW-bubb... | [
{
"created": "Fri, 12 Feb 2016 14:39:26 GMT",
"version": "v1"
}
] | 2016-02-16 | [
[
"Burinskii",
"Alexander",
""
]
] | We consider the chiral field model of the source of the Kerr-Newman (KN) solution and obtain that it represents a supersymmetric spinning soliton, bounded by the chiral domain wall (DW) of the ellipsoidal form. The known method for transformation of the planar DW to Bogomolnyi form we generalize to the curved DW-bubble... |
1002.1066 | Joel Franklin | S. Deser and J. Franklin | De/re-constructing the Kerr Metric | null | Gen Rel Grav 42 2657 (2010) | 10.1007/s10714-010-1002-8 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the Kerr solution in a pedagogically transparent way, using
physical symmetry and gauge arguments to reduce the candidate metric to just
two unknowns. The resulting field equations are then easy to obtain, and solve.
Separately, we transform the Kerr metric to Schwarzschild frame to exhibit its
limits in th... | [
{
"created": "Thu, 4 Feb 2010 20:02:19 GMT",
"version": "v1"
}
] | 2010-10-21 | [
[
"Deser",
"S.",
""
],
[
"Franklin",
"J.",
""
]
] | We derive the Kerr solution in a pedagogically transparent way, using physical symmetry and gauge arguments to reduce the candidate metric to just two unknowns. The resulting field equations are then easy to obtain, and solve. Separately, we transform the Kerr metric to Schwarzschild frame to exhibit its limits in that... |
0809.3284 | Sushil Srivastava | S.K.Srivastava | A Different Approach to $f(R)$-Cosmology | This is an invited article for the anniversary volume on the occasion
of 50th birthday of Prof. Sergie D. Odintsov being published by Tomsk State
Pedagogical University | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here $f(R)$-cosmology is discussed using a different approach. This model
explains early-inflation, emergence of cosmic background radiation at the exit
from inflation, cosmic deceleration during radiation-dominance followed by
deceleration due to curvature-induced matter and acceleration in the very late
universe du... | [
{
"created": "Fri, 19 Sep 2008 01:35:21 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Oct 2008 10:03:27 GMT",
"version": "v2"
}
] | 2008-10-09 | [
[
"Srivastava",
"S. K.",
""
]
] | Here $f(R)$-cosmology is discussed using a different approach. This model explains early-inflation, emergence of cosmic background radiation at the exit from inflation, cosmic deceleration during radiation-dominance followed by deceleration due to curvature-induced matter and acceleration in the very late universe due ... |
2207.02689 | Tatyana P. Shestakova | T. P. Shestakova | The birth of the Universe as a result of the change of the metric
signature | 15 pages, 1 figure; the paper was written for the Special Issue
titled "Light on Dark Worlds - A Themed Issue in Honor of Professor Maxim Yu.
Khlopov on the Occasion of His 70th Birthday" | Physics 4 (2022) 160-171 | 10.3390/physics4010012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, I discuss the idea that the birth of our Universe may be a
result of a quantum transition from a physical continuum with the Euclidean
signature to a Lorentzian spacetime. A similar idea was expressed by Andrei D.
Sakharov. At the classical level, the idea was studied by George F. R. Ellis
and his coll... | [
{
"created": "Wed, 6 Jul 2022 13:52:22 GMT",
"version": "v1"
}
] | 2022-07-07 | [
[
"Shestakova",
"T. P.",
""
]
] | In this paper, I discuss the idea that the birth of our Universe may be a result of a quantum transition from a physical continuum with the Euclidean signature to a Lorentzian spacetime. A similar idea was expressed by Andrei D. Sakharov. At the classical level, the idea was studied by George F. R. Ellis and his collab... |
1712.01101 | Bogdan Dimitrov | Bogdan G. Dimitrov | Two null gravitational cones in the theory of GPS-intersatellite
communications between two moving satellites. I. Physical and mathematical
theory of the space-time interval and the geodesic distance on intersecting
null cones | 162 pages, no figures, one-column style, to be subm. to Phys. Rev.D;
this (third) version is substantially expanded with respect to the second
version, new sections III and IV are added; also within the already existing
sections -(sub)sections II B and VI F are added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Several space missions such as GRACE, GRAIL, ACES and others rely on
intersatellite communications (ISC) between two satellites at a large distance
one from another. The main goal of the theory is to formulate all the
navigation observables within the General Relativity Theory. The same approach
should be applied als... | [
{
"created": "Fri, 1 Dec 2017 11:58:01 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Sep 2018 17:19:24 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Sep 2019 18:45:10 GMT",
"version": "v3"
}
] | 2019-09-25 | [
[
"Dimitrov",
"Bogdan G.",
""
]
] | Several space missions such as GRACE, GRAIL, ACES and others rely on intersatellite communications (ISC) between two satellites at a large distance one from another. The main goal of the theory is to formulate all the navigation observables within the General Relativity Theory. The same approach should be applied also ... |
gr-qc/9306017 | Dr. Robert Graham | J. Bene (INSTITUTE for Solid State Physics, E\"otv\"os University,
Muzeum krt. 6-8, H-1088 Budapest, Hungary) and R. Graham (FACHBEREICH Physik,
Universit\"at Gesamthochschule Essen D4300 Essen 1, Germany) | Supersymmetric Homogeneous Quantum Cosmologies Coupled to a Scalar Field | 23 PAGES | Phys.Rev. D49 (1994) 799-815 | 10.1103/PhysRevD.49.799 | null | gr-qc | null | Recent work on $N=2$ supersymmetric Bianchi type IX cosmologies coupled to a
scalar field is extended to a general treatment of homogeneous quantum
cosmologies with explicitely solvable momentum constraints, i.e. Bianchi types
I, II, VII, VIII besides the Bianchi type IX, and special cases, namely the
Friedmann unive... | [
{
"created": "Mon, 14 Jun 1993 13:26:50 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Bene",
"J.",
"",
"INSTITUTE for Solid State Physics, Eötvös University,\n Muzeum krt. 6-8, H-1088 Budapest, Hungary"
],
[
"Graham",
"R.",
"",
"FACHBEREICH Physik,\n Universität Gesamthochschule Essen D4300 Essen 1, Germany"
]
] | Recent work on $N=2$ supersymmetric Bianchi type IX cosmologies coupled to a scalar field is extended to a general treatment of homogeneous quantum cosmologies with explicitely solvable momentum constraints, i.e. Bianchi types I, II, VII, VIII besides the Bianchi type IX, and special cases, namely the Friedmann univers... |
2405.17212 | Rong-Jia Yang | Tong-Yu He, Jia-Jun Yin, Zhen-Yu Wang, Zhan-Wen Han, Rong-Jia Yang | A new parametrization of Hubble function and Hubble tension | 11 pages, 5 figures | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We present a new Hubble parameterization method and employ observational data
from Hubble, Pantheon, and Baryon Acoustic Oscillations to constrain model
parameters. The proposed method is thoroughly validated against these datasets,
demonstrating a robust fit to the observational data. The obtained best-fit
values ar... | [
{
"created": "Mon, 27 May 2024 14:33:28 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Jun 2024 07:45:59 GMT",
"version": "v2"
}
] | 2024-06-18 | [
[
"He",
"Tong-Yu",
""
],
[
"Yin",
"Jia-Jun",
""
],
[
"Wang",
"Zhen-Yu",
""
],
[
"Han",
"Zhan-Wen",
""
],
[
"Yang",
"Rong-Jia",
""
]
] | We present a new Hubble parameterization method and employ observational data from Hubble, Pantheon, and Baryon Acoustic Oscillations to constrain model parameters. The proposed method is thoroughly validated against these datasets, demonstrating a robust fit to the observational data. The obtained best-fit values are ... |
2109.09497 | Marcos Ramiro Alfredo Arcod\'ia | Marcos R. A. Arcod\'ia and Rafael Ferraro | Double-extended Kerr-Schild form for $5D$ electrovacuum solutions | 13 pages | General Relativity and Gravitation 54, 130 (2022) | 10.1007/s10714-022-03013-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Five-dimensional Einstein-Maxwell-Chern-Simons equations are investigated in
the framework of an extended Kerr-Schild strategy to search for black holes
solutions. The fulfillment of Einstein equations constrains the Chern-Simons
coupling constant to a value determined by the trace of the energy-momentum
tensor of th... | [
{
"created": "Thu, 16 Sep 2021 18:02:18 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Mar 2022 14:20:27 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Oct 2022 04:33:05 GMT",
"version": "v3"
},
{
"created": "Sun, 23 Oct 2022 01:18:11 GMT",
"version": "v4"
}
] | 2022-10-25 | [
[
"Arcodía",
"Marcos R. A.",
""
],
[
"Ferraro",
"Rafael",
""
]
] | Five-dimensional Einstein-Maxwell-Chern-Simons equations are investigated in the framework of an extended Kerr-Schild strategy to search for black holes solutions. The fulfillment of Einstein equations constrains the Chern-Simons coupling constant to a value determined by the trace of the energy-momentum tensor of the ... |
2210.15895 | Bobby Eka Gunara | Emir Syahreza Fadhilla, Ardian Nata Atmaja, and Bobby Eka Gunara | Global Existence and Singularity Formation of Classical Solutions in
Einstein-Skyrme System | 32 pages, no figures, and comments are welcome. The title slightly
changed, some theorems added, the main theorem revised, and some additional
calculations as the consequences of topology of Skyrmions added | null | null | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | In this paper, we elucidate the problem of gravitating Skyrmion governed by
field equations of the Einstein-Skyrme system with no potential term in the
Bondi coordinate. The spherical symmetry has to be assumed and both the metric
functions and Skyrme ansatz depend on radial and retarded time coordinates
which implie... | [
{
"created": "Fri, 28 Oct 2022 05:03:31 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Sep 2023 13:43:47 GMT",
"version": "v2"
}
] | 2023-09-26 | [
[
"Fadhilla",
"Emir Syahreza",
""
],
[
"Atmaja",
"Ardian Nata",
""
],
[
"Gunara",
"Bobby Eka",
""
]
] | In this paper, we elucidate the problem of gravitating Skyrmion governed by field equations of the Einstein-Skyrme system with no potential term in the Bondi coordinate. The spherical symmetry has to be assumed and both the metric functions and Skyrme ansatz depend on radial and retarded time coordinates which implies ... |
gr-qc/0205133 | Mohammad Mehrafarin | M. Mehrafarin | A phase transition model for metric fluctuations in vacuum | 4 pages | null | null | null | gr-qc | null | Regarding metric fluctuations as generating {\it roughness} on the fabric of
the otherwise smooth vacuum, it is shown that in its simplest form, the effect
can be described by the scalar $\phi^4$ model. The model exhibits a second
order phase transition between a smooth (low-temperature) phase and a rough
(high-tempe... | [
{
"created": "Thu, 30 May 2002 21:17:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mehrafarin",
"M.",
""
]
] | Regarding metric fluctuations as generating {\it roughness} on the fabric of the otherwise smooth vacuum, it is shown that in its simplest form, the effect can be described by the scalar $\phi^4$ model. The model exhibits a second order phase transition between a smooth (low-temperature) phase and a rough (high-tempera... |
2110.10870 | Jobin Thomas Valliyakalayil Mr | Jobin Thomas Valliyakalayil (1), Andrew J. H. Sutton (1), Robert E.
Spero (2), Daniel A. Shaddock (1) and Kirk McKenzie (1) ((1) Centre for
Gravitational Astrophysics, Australian National University, (2) Jet
Propulsion Laboratory, California Institute of Technology) | Enhanced Frequency noise suppression for LISA by combining cavity and
arm locking control systems | 17 pages, 15 figures | null | 10.1103/PhysRevD.105.062005 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This paper presents a novel method for laser frequency stabilisation in the
Laser Interferometer Space Antenna (LISA) mission by locking a laser to two
stable length references - the arms of the interferometer and an on-board
optical cavity. The two references are digitally fused using carefully designed
control syst... | [
{
"created": "Thu, 21 Oct 2021 03:16:56 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Mar 2022 23:12:03 GMT",
"version": "v2"
}
] | 2022-04-06 | [
[
"Valliyakalayil",
"Jobin Thomas",
""
],
[
"Sutton",
"Andrew J. H.",
""
],
[
"Spero",
"Robert E.",
""
],
[
"Shaddock",
"Daniel A.",
""
],
[
"McKenzie",
"Kirk",
""
]
] | This paper presents a novel method for laser frequency stabilisation in the Laser Interferometer Space Antenna (LISA) mission by locking a laser to two stable length references - the arms of the interferometer and an on-board optical cavity. The two references are digitally fused using carefully designed control system... |
1708.04359 | Torrey Cullen | Torrey Cullen, Ian Harry, Jocelyn Read, Eric Flynn | Matter Effects on LIGO/Virgo Searches for Gravitational Waves from
Merging Neutron Stars | null | null | 10.1088/1361-6382/aa9424 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves from merging neutron stars are expected to be observed in
the next 5 years. We explore the potential impact of matter effects on
gravitational waves from merging double neutron-star binaries. If neutron star
binaries exist with chirp masses less than roughly 1 solar mass and typical
neutron-star r... | [
{
"created": "Mon, 14 Aug 2017 23:53:07 GMT",
"version": "v1"
}
] | 2017-12-06 | [
[
"Cullen",
"Torrey",
""
],
[
"Harry",
"Ian",
""
],
[
"Read",
"Jocelyn",
""
],
[
"Flynn",
"Eric",
""
]
] | Gravitational waves from merging neutron stars are expected to be observed in the next 5 years. We explore the potential impact of matter effects on gravitational waves from merging double neutron-star binaries. If neutron star binaries exist with chirp masses less than roughly 1 solar mass and typical neutron-star rad... |
gr-qc/0610107 | Hamid Reza Sepangi | K. Atazadeh and H. R. Sepangi | Modified gravity inspired DGP brane cosmology | 8 pages, to appear in PLB | Phys.Lett.B643:76-80,2006 | 10.1016/j.physletb.2006.10.029 | null | gr-qc hep-th | null | We consider a DGP brane scenario where a scalar field is present on the brane
through the introduction of a scalar potential, itself motivated by the notion
of modified gravity. This theory predicts that the mass appearing in the
gravitational potential is modified by the addition of the mass of the scalar
field. The... | [
{
"created": "Sun, 22 Oct 2006 08:01:49 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Dec 2006 14:26:42 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Atazadeh",
"K.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | We consider a DGP brane scenario where a scalar field is present on the brane through the introduction of a scalar potential, itself motivated by the notion of modified gravity. This theory predicts that the mass appearing in the gravitational potential is modified by the addition of the mass of the scalar field. The c... |
2308.03468 | Edward Malec | Edward Malec | The mass density contrast in perturbed
Friedman-Lemaitre-Robertson-Walker cosmologies | 5 pages | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We analyze the evolution of the mass density contrast in spherical
perturbations of flat Friedman-Lemaitre-Robertson-Walker cosmologies. Both dark
matter and dark energy are included. In the absence of dark energy the
evolution equation coincides with that obtained by Bonnor within the
``Newtonian cosmology''.
| [
{
"created": "Mon, 7 Aug 2023 10:50:16 GMT",
"version": "v1"
}
] | 2023-08-08 | [
[
"Malec",
"Edward",
""
]
] | We analyze the evolution of the mass density contrast in spherical perturbations of flat Friedman-Lemaitre-Robertson-Walker cosmologies. Both dark matter and dark energy are included. In the absence of dark energy the evolution equation coincides with that obtained by Bonnor within the ``Newtonian cosmology''. |
1508.06159 | Pac\^ome Delva Dr. | P. Delva, A. Hees, S. Bertone, E. Richard and P. Wolf | Test of the gravitational redshift with stable clocks in eccentric
orbits: application to Galileo satellites 5 and 6 | 13 pages, 5 figures, accepted in Classical and Quantum Gravity as a
Fast Track Communication | Class. Quantum Grav. 32, 232003, 2015 | 10.1088/0264-9381/32/23/232003 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein Equivalence Principle (EEP) is one of the foundations of the
theory of General Relativity and several alternative theories of gravitation
predict violations of the EEP. Experimental constraints on this fundamental
principle of nature are therefore of paramount importance. The EEP can be split
in three su... | [
{
"created": "Tue, 25 Aug 2015 14:06:47 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Oct 2015 15:53:40 GMT",
"version": "v2"
}
] | 2015-11-19 | [
[
"Delva",
"P.",
""
],
[
"Hees",
"A.",
""
],
[
"Bertone",
"S.",
""
],
[
"Richard",
"E.",
""
],
[
"Wolf",
"P.",
""
]
] | The Einstein Equivalence Principle (EEP) is one of the foundations of the theory of General Relativity and several alternative theories of gravitation predict violations of the EEP. Experimental constraints on this fundamental principle of nature are therefore of paramount importance. The EEP can be split in three sub-... |
1610.02211 | Boris Latosh | B.N. Latosh | Horndeski/Galileon in High Energy Collisions | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Horndeski/Galileons may be considered as a proper generalization of General
Relativity in high energy regime. Thus one may search for manifestation of
Galileons interaction in collision experiments. In this paper we give arguments
supporting this thesis. Galileon scalar field do not interact with matter via
Standard ... | [
{
"created": "Fri, 7 Oct 2016 10:03:25 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Oct 2016 16:48:19 GMT",
"version": "v2"
}
] | 2016-10-18 | [
[
"Latosh",
"B. N.",
""
]
] | Horndeski/Galileons may be considered as a proper generalization of General Relativity in high energy regime. Thus one may search for manifestation of Galileons interaction in collision experiments. In this paper we give arguments supporting this thesis. Galileon scalar field do not interact with matter via Standard Mo... |
2004.01434 | Stefan Grimm | Stefan Grimm, Jan Harms | Multiband Gravitational Wave Parameter Estimation: A Study of Future
Detectors | 20 pages, 18 figures | Phys. Rev. D 102, 022007 (2020) | 10.1103/PhysRevD.102.022007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The first detection of a gravitational-wave signal of a coalescence of two
black holes marked the beginning of the era of gravitational-wave astronomy,
which opens exciting new possibilities in the fields of astronomy, astrophysics
and cosmology. The currently operating detectors of the LIGO and Virgo
collaborations ... | [
{
"created": "Fri, 3 Apr 2020 08:52:54 GMT",
"version": "v1"
}
] | 2020-07-29 | [
[
"Grimm",
"Stefan",
""
],
[
"Harms",
"Jan",
""
]
] | The first detection of a gravitational-wave signal of a coalescence of two black holes marked the beginning of the era of gravitational-wave astronomy, which opens exciting new possibilities in the fields of astronomy, astrophysics and cosmology. The currently operating detectors of the LIGO and Virgo collaborations ar... |
1512.05018 | Matt Visser | Finnian Gray (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | Greybody factors for Schwarzschild black holes: Path-ordered
exponentials and product integrals | 28 pages; 10 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent work concerning the sparsity of the Hawking flux
[arXiv:1506.03975v2], we found it necessary to re-examine what is known
regarding the greybody factors of black holes, with a view to extending and
expanding on some old results from the 1970s. Focussing specifically on
Schwarzschild black holes, we re-calcul... | [
{
"created": "Wed, 16 Dec 2015 01:02:09 GMT",
"version": "v1"
}
] | 2015-12-17 | [
[
"Gray",
"Finnian",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | In recent work concerning the sparsity of the Hawking flux [arXiv:1506.03975v2], we found it necessary to re-examine what is known regarding the greybody factors of black holes, with a view to extending and expanding on some old results from the 1970s. Focussing specifically on Schwarzschild black holes, we re-calculat... |
gr-qc/0410139 | George E. A. Matsas | Luis C. B. Crispino, Atsushi Higuchi and George E. A. Matsas | Is the equivalence for the response of static scalar sources in the
Schwarzschild and Rindler spacetimes valid only in four dimensions? | 4 pages, 1 figure | Phys.Rev. D70 (2004) 127504 | 10.1103/PhysRevD.70.127504 | null | gr-qc hep-th | null | It was shown recently that in four dimensions scalar sources with fixed
proper acceleration minimally coupled to a massless Klein-Gordon field lead to
the same responses when they are (i) uniformly accelerated in Minkowski
spacetime (in the inertial vacuum) and (ii) static in the Schwarzschild
spacetime (in the Unruh... | [
{
"created": "Thu, 28 Oct 2004 11:52:45 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Crispino",
"Luis C. B.",
""
],
[
"Higuchi",
"Atsushi",
""
],
[
"Matsas",
"George E. A.",
""
]
] | It was shown recently that in four dimensions scalar sources with fixed proper acceleration minimally coupled to a massless Klein-Gordon field lead to the same responses when they are (i) uniformly accelerated in Minkowski spacetime (in the inertial vacuum) and (ii) static in the Schwarzschild spacetime (in the Unruh v... |
1701.00809 | Khrystyna Gnatenko | Kh. P. Gnatenko, V. M. Tkachuk | Weak equivalence principle in noncommutative phase space and the
parameters of noncommutativity | null | Phys. Lett. A, 381, 2463 (2017) | 10.1016/j.physleta.2017.05.056 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The weak equivalence principle is studied in a space with noncommutativity of
coordinates and noncommutativity of momenta. We find conditions on the
parameters of noncommutativity which give the possibility to recover the
equivalence principle in noncommutative phase space. It is also shown that in
the case when thes... | [
{
"created": "Wed, 21 Dec 2016 15:15:35 GMT",
"version": "v1"
}
] | 2017-06-27 | [
[
"Gnatenko",
"Kh. P.",
""
],
[
"Tkachuk",
"V. M.",
""
]
] | The weak equivalence principle is studied in a space with noncommutativity of coordinates and noncommutativity of momenta. We find conditions on the parameters of noncommutativity which give the possibility to recover the equivalence principle in noncommutative phase space. It is also shown that in the case when these ... |
0706.2863 | Chih-Hung Wang | Chih-Hung Wang | Charged Fluid Dynamics in Scalar-Tensor Theories of Gravity with Torsion | 4 pages | null | 10.1142/9789812834300_0129 | null | gr-qc | null | n scalar-tensor theories of gravity with torsion, the gravitational field is
described in terms of a symmetric metric tensor $g$, a metric-compatible
connection $\nabla$ with torsion, and a scalar field $\phi$. The main aim is to
explore an interaction of a charged perfect fluid and a scalar field $\phi$ in
a backgro... | [
{
"created": "Tue, 19 Jun 2007 20:00:37 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Wang",
"Chih-Hung",
""
]
] | n scalar-tensor theories of gravity with torsion, the gravitational field is described in terms of a symmetric metric tensor $g$, a metric-compatible connection $\nabla$ with torsion, and a scalar field $\phi$. The main aim is to explore an interaction of a charged perfect fluid and a scalar field $\phi$ in a backgroun... |
2212.01798 | Chen Wu | Mao-Yuan Wan and Chen Wu | Absorption and scattering of massless scalar wave from Regular Black
Holes | 15 pages, 5 figures | General Relativity and Gravitation (2022)54:148 | 10.1007/s10714-022-03034-y | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | In this work, we numerically investigate the scattering and absorption cross
section of the massless scalar field from some well-known regular black holes
by using the partial wave approach. Our computational results indicate that the
larger the parameters, the lower the associated total absorption cross section
maxi... | [
{
"created": "Sun, 4 Dec 2022 11:35:00 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Dec 2022 02:41:36 GMT",
"version": "v2"
}
] | 2022-12-07 | [
[
"Wan",
"Mao-Yuan",
""
],
[
"Wu",
"Chen",
""
]
] | In this work, we numerically investigate the scattering and absorption cross section of the massless scalar field from some well-known regular black holes by using the partial wave approach. Our computational results indicate that the larger the parameters, the lower the associated total absorption cross section maxima... |
1307.7045 | Sunandan Gangopadhyay | Sunandan Gangopadhyay, Abhijit Dutta, Anirban Saha | Generalized uncertainty principle and black hole thermodynamics | 9 pages Latex, References added, To appear in Gen.Rel.Grav | Gen. Rel.Grav. 46 (2014) 1661 | 10.1007/s10714-013-1661-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Schwarzschild and Reissner-Nordstr\"{o}m black hole
thermodynamics using the simplest form of the generalized uncertainty principle
(GUP) proposed in the literature. The expressions for the mass-temperature
relation, heat capacity and entropy are obtained in both cases from which the
critical and remnant... | [
{
"created": "Fri, 26 Jul 2013 14:32:33 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jan 2014 09:59:44 GMT",
"version": "v2"
}
] | 2015-06-16 | [
[
"Gangopadhyay",
"Sunandan",
""
],
[
"Dutta",
"Abhijit",
""
],
[
"Saha",
"Anirban",
""
]
] | We study the Schwarzschild and Reissner-Nordstr\"{o}m black hole thermodynamics using the simplest form of the generalized uncertainty principle (GUP) proposed in the literature. The expressions for the mass-temperature relation, heat capacity and entropy are obtained in both cases from which the critical and remnant m... |
1401.6062 | Philipp Hoehn | Philipp A. Hoehn | Quantization of systems with temporally varying discretization I:
Evolving Hilbert spaces | 45 pages, 1 appendix, 6 figures (additional explanations, now matches
published version) | J. Math. Phys. 55, 083508 (2014) | 10.1063/1.4890558 | null | gr-qc hep-lat math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A temporally varying discretization often features in discrete gravitational
systems and appears in lattice field theory models subject to a coarse graining
or refining dynamics. To better understand such discretization changing
dynamics in the quantum theory, an according formalism for constrained
variational discre... | [
{
"created": "Thu, 23 Jan 2014 17:25:50 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Feb 2014 00:51:02 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Oct 2014 14:41:07 GMT",
"version": "v3"
}
] | 2014-10-03 | [
[
"Hoehn",
"Philipp A.",
""
]
] | A temporally varying discretization often features in discrete gravitational systems and appears in lattice field theory models subject to a coarse graining or refining dynamics. To better understand such discretization changing dynamics in the quantum theory, an according formalism for constrained variational discrete... |
1910.02567 | Marc Casals | Marc Casals, Brien C. Nolan, Adrian C. Ottewill, Barry Wardell | Regularized calculation of the retarded Green function in Schwarzschild
spacetime | 13 pages, 4 figures; 2 Mathematica notebooks as ancillary files | Phys. Rev. D 100, 104037 (2019) | 10.1103/PhysRevD.100.104037 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The retarded Green function for linear field perturbations of black hole
spacetimes is notoriously difficult to calculate. One of the difficulties is
due to a Dirac-$\delta$ divergence that the Green function possesses when the
two spacetime points are connected by a "direct" null geodesic. We present a
procedure whi... | [
{
"created": "Mon, 7 Oct 2019 00:55:36 GMT",
"version": "v1"
}
] | 2019-11-27 | [
[
"Casals",
"Marc",
""
],
[
"Nolan",
"Brien C.",
""
],
[
"Ottewill",
"Adrian C.",
""
],
[
"Wardell",
"Barry",
""
]
] | The retarded Green function for linear field perturbations of black hole spacetimes is notoriously difficult to calculate. One of the difficulties is due to a Dirac-$\delta$ divergence that the Green function possesses when the two spacetime points are connected by a "direct" null geodesic. We present a procedure which... |
0708.1237 | Gaurang Mahajan | Gaurang Mahajan, T. Padmanabhan | Particle creation, classicality and related issues in quantum field
theory: II. Examples from field theory | RevTeX 4; 27 pages; 18 figures; second of a series of two papers, the
first being arXiv:0708.1233 [gr-qc]; high resolution figures available from
the authors on request | Gen.Rel.Grav. 40 (2008) 709-747 | 10.1007/s10714-007-0527-y | null | gr-qc astro-ph hep-th | null | We adopt the general formalism, which was developed in Paper I
(arXiv:0708.1233) to analyze the evolution of a quantized time-dependent
oscillator, to address several questions in the context of quantum field theory
in time dependent external backgrounds. In particular, we study the question of
emergence of classical... | [
{
"created": "Thu, 9 Aug 2007 10:23:30 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Mahajan",
"Gaurang",
""
],
[
"Padmanabhan",
"T.",
""
]
] | We adopt the general formalism, which was developed in Paper I (arXiv:0708.1233) to analyze the evolution of a quantized time-dependent oscillator, to address several questions in the context of quantum field theory in time dependent external backgrounds. In particular, we study the question of emergence of classicalit... |
1807.06138 | Claudio Cremaschini | Massimo Tessarotto and Claudio Cremaschini | Generalized Lagrangian Path approach to manifestly-covariant quantum
gravity theory | null | Entropy 20, 205 (2018) | 10.3390/e20030205 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A trajectory-based representation for the quantum theory of the gravitational
field is formulated. This is achieved in terms of a covariant Generalized
Lagrangian-Path (GLP) approach which relies on a suitable statistical
representation of Bohmian Lagrangian trajectories, referred to here as
GLP-representation. The r... | [
{
"created": "Mon, 16 Jul 2018 22:30:09 GMT",
"version": "v1"
}
] | 2018-07-18 | [
[
"Tessarotto",
"Massimo",
""
],
[
"Cremaschini",
"Claudio",
""
]
] | A trajectory-based representation for the quantum theory of the gravitational field is formulated. This is achieved in terms of a covariant Generalized Lagrangian-Path (GLP) approach which relies on a suitable statistical representation of Bohmian Lagrangian trajectories, referred to here as GLP-representation. The res... |
2202.08150 | Bivudutta Mishra Dr. | L.K. Duchaniya, Santosh V Lohakare, B. Mishra, S.K. Tripathy | Dynamical Stability Analysis of Accelerating f(T) Gravity Models | 13 pages, 12 figures | Eur. Phys. J. C (2022) 82:448 | 10.1140/epjc/s10052-022-10406-w | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have emphasized the stability analysis of the accelerating
cosmological models obtained in $f(T)$ gravity theory. The behavior of the
models based on the evolution of the equation of state parameter shows
phantom-like behavior at the present epoch. The scalar perturbation technique
is used to create... | [
{
"created": "Tue, 15 Feb 2022 17:09:22 GMT",
"version": "v1"
},
{
"created": "Tue, 24 May 2022 06:39:09 GMT",
"version": "v2"
}
] | 2022-05-25 | [
[
"Duchaniya",
"L. K.",
""
],
[
"Lohakare",
"Santosh V",
""
],
[
"Mishra",
"B.",
""
],
[
"Tripathy",
"S. K.",
""
]
] | In this paper, we have emphasized the stability analysis of the accelerating cosmological models obtained in $f(T)$ gravity theory. The behavior of the models based on the evolution of the equation of state parameter shows phantom-like behavior at the present epoch. The scalar perturbation technique is used to create t... |
1312.1151 | Hossein Mohseni Sadjadi | H. Mohseni Sadjadi | Rapid Oscillatory quintessence with variable equation of state parameter
in non minimal derivative coupling model | 19 pages, 7 figures, major revision | Gen. Relativ Gravit 46 (2014) 1817 | 10.1007/s10714-014-1817-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The rapid oscillating scalar field is considered as the quintessence in the
framework of nonminimal kinetic coupling model. The scalar field behaves like a
perfect fluid with a variable equation of state parameter which can be
expressed as a function of the Hubble parameter. This feature enables us to
study its evolu... | [
{
"created": "Tue, 3 Dec 2013 14:03:31 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Mar 2014 13:35:46 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Oct 2014 16:58:42 GMT",
"version": "v3"
}
] | 2014-12-24 | [
[
"Sadjadi",
"H. Mohseni",
""
]
] | The rapid oscillating scalar field is considered as the quintessence in the framework of nonminimal kinetic coupling model. The scalar field behaves like a perfect fluid with a variable equation of state parameter which can be expressed as a function of the Hubble parameter. This feature enables us to study its evoluti... |
1401.6503 | Gabriele Umberto Varieschi | Gabriele U. Varieschi | Kerr Metric, Geodesic Motion, and Flyby Anomaly in Fourth-Order
Conformal Gravity | Revised version: improved notation, added references, comments, and
one equation. 31 pages, including 2 figures. Accepted for publication in
General Relativity and Gravitation | Gen.Rel.Grav. 46 (2014) 1741 | 10.1007/s10714-014-1741-z | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we analyze the Kerr geometry in the context of Conformal
Gravity, an alternative theory of gravitation, which is a direct extension of
General Relativity. Following previous studies in the literature, we introduce
an explicit expression of the Kerr metric in Conformal Gravity, which naturally
reduces to... | [
{
"created": "Sat, 25 Jan 2014 07:57:12 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Apr 2014 16:44:36 GMT",
"version": "v2"
}
] | 2014-05-20 | [
[
"Varieschi",
"Gabriele U.",
""
]
] | In this paper we analyze the Kerr geometry in the context of Conformal Gravity, an alternative theory of gravitation, which is a direct extension of General Relativity. Following previous studies in the literature, we introduce an explicit expression of the Kerr metric in Conformal Gravity, which naturally reduces to t... |
1610.01235 | Carlos Eduardo Gabarrete Fajardo | Luis O. Pimentel and Carlos E. Gabarrete | Some exact solutions in K-essence theory isotropic cosmology | 5 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use a simple form of the K-essence theory and apply it to the classic
isotropic cosmological model and seek exact solutions. The particular form of
the kinetic term that we choose is $K \left(\phi, X \right)= K_0(\phi)X^m
+K_1$. The resulting field equations in the homogeneous and isotropic cosmology
(FRW)is consi... | [
{
"created": "Tue, 4 Oct 2016 23:57:37 GMT",
"version": "v1"
}
] | 2016-10-06 | [
[
"Pimentel",
"Luis O.",
""
],
[
"Gabarrete",
"Carlos E.",
""
]
] | We use a simple form of the K-essence theory and apply it to the classic isotropic cosmological model and seek exact solutions. The particular form of the kinetic term that we choose is $K \left(\phi, X \right)= K_0(\phi)X^m +K_1$. The resulting field equations in the homogeneous and isotropic cosmology (FRW)is conside... |
2205.04680 | Nikolaos Dimakis | N. Dimakis, A. Paliathanasis, M. Roumeliotis and T. Christodoulakis | FLRW solutions in $f(Q)$ theory: the effect of using different
connections | 19 pages, 5 figures, Latex2e source file, updated version, to appear
in PRD | null | 10.1103/PhysRevD.106.043509 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a Friedmann-Lema\^{\i}tre-Robertson-Walker (FLRW) space-time in the
theory of $f(Q)$-gravity, where $Q$ denotes the non-metricity scalar. It has
been previously shown in the literature, that there exist four distinct
families of connections, which are compatible with the isometries of the FLRW
metric; three ... | [
{
"created": "Tue, 10 May 2022 05:22:13 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Jul 2022 08:22:16 GMT",
"version": "v2"
}
] | 2022-08-17 | [
[
"Dimakis",
"N.",
""
],
[
"Paliathanasis",
"A.",
""
],
[
"Roumeliotis",
"M.",
""
],
[
"Christodoulakis",
"T.",
""
]
] | We study a Friedmann-Lema\^{\i}tre-Robertson-Walker (FLRW) space-time in the theory of $f(Q)$-gravity, where $Q$ denotes the non-metricity scalar. It has been previously shown in the literature, that there exist four distinct families of connections, which are compatible with the isometries of the FLRW metric; three fo... |
2104.13611 | Angel Rincon | Grigoris Panotopoulos, Angel Rincon and Ilidio Lopes | Orbits of light rays in scale-dependent gravity: Exact analytical
solutions to the null geodesic equations | 10 pages, 8 figures, accepted in PRD | Phys. Rev. D 103 (2021), 104040 | 10.1103/PhysRevD.103.104040 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study photon orbits in the background of $(1+3)$-dimensional static,
spherically symmetric geometries. In particular, we have obtained exact
analytical solutions to the null geodesic equations for light rays in terms of
the Weierstra{\ss} function for space-times arising in the context of
scale-dependent gravity. ... | [
{
"created": "Wed, 28 Apr 2021 07:45:16 GMT",
"version": "v1"
}
] | 2021-05-20 | [
[
"Panotopoulos",
"Grigoris",
""
],
[
"Rincon",
"Angel",
""
],
[
"Lopes",
"Ilidio",
""
]
] | We study photon orbits in the background of $(1+3)$-dimensional static, spherically symmetric geometries. In particular, we have obtained exact analytical solutions to the null geodesic equations for light rays in terms of the Weierstra{\ss} function for space-times arising in the context of scale-dependent gravity. Th... |
2401.01541 | Hyeong-Chan Kim | Hyeong-Chan Kim | Temperature of a steady system around a black hole | 18 pages, 1 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the issue of temperature in a steady system around a black hole
event horizon, contrasting it with the appearance of divergence in a thermal
equilibrium system. We focus on a spherically symmetric system governed by
general relativity, particularly examining the steady state with radial heat
conduction. Empl... | [
{
"created": "Wed, 3 Jan 2024 04:50:07 GMT",
"version": "v1"
}
] | 2024-01-04 | [
[
"Kim",
"Hyeong-Chan",
""
]
] | We study the issue of temperature in a steady system around a black hole event horizon, contrasting it with the appearance of divergence in a thermal equilibrium system. We focus on a spherically symmetric system governed by general relativity, particularly examining the steady state with radial heat conduction. Employ... |
2301.07220 | Tom\'a\v{s} Tint\v{e}ra | Tom\'a\v{s} Tint\v{e}ra | On Weyl alignment preserving Kaluza-Klein reduction of vacuum | 47 pages, 1 figure | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study null alignment properties of Weyl tensors related via
Kaluza$\unicode{x2013}$Klein reduction of vacuum spacetimes by one spatial
Killing direction. Kaluza$\unicode{x2013}$Klein reduction is a method that
relates spacetimes of different dimensionality. Weyl tensor null alignment is
used in a recently proposed... | [
{
"created": "Tue, 17 Jan 2023 23:01:29 GMT",
"version": "v1"
}
] | 2023-01-19 | [
[
"Tintěra",
"Tomáš",
""
]
] | We study null alignment properties of Weyl tensors related via Kaluza$\unicode{x2013}$Klein reduction of vacuum spacetimes by one spatial Killing direction. Kaluza$\unicode{x2013}$Klein reduction is a method that relates spacetimes of different dimensionality. Weyl tensor null alignment is used in a recently proposed g... |
1709.01095 | Steffen Gielen | Steffen Gielen, Daniele Oriti | Cosmological perturbations from full quantum gravity | 8 pages, revtex, APS style; v2: included a discussion of density
perturbations (Sec. VI), some statements clarified and shortened; version
accepted for publication; v3: minor spelling and typesetting changes, very
close to published version | Phys. Rev. D 98, 106019 (2018) | 10.1103/PhysRevD.98.106019 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The early universe provides an opportunity for quantum gravity to connect to
observation by explaining the large-scale structure of the Universe. In the
group field theory (GFT) approach, a macroscopic universe is described as a GFT
condensate; this idea has already been shown to reproduce a semiclassical large
unive... | [
{
"created": "Mon, 4 Sep 2017 18:01:16 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Nov 2018 16:13:35 GMT",
"version": "v2"
},
{
"created": "Thu, 15 Nov 2018 14:23:47 GMT",
"version": "v3"
}
] | 2018-12-05 | [
[
"Gielen",
"Steffen",
""
],
[
"Oriti",
"Daniele",
""
]
] | The early universe provides an opportunity for quantum gravity to connect to observation by explaining the large-scale structure of the Universe. In the group field theory (GFT) approach, a macroscopic universe is described as a GFT condensate; this idea has already been shown to reproduce a semiclassical large univers... |
1711.00087 | Kirill Bronnikov | K. A. Bronnikov | Nonlinear electrodynamics, regular black holes and wormholes | 18 pages, 2 figures | Int. J. Mod. Phys. D 27, 1841005 (2018) | 10.1142/S0218271818410055 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider spherically symmetric configurations in general relativity,
supported by nonlinear electromagnetic fields with gauge-invariant Lagrangians
depending on the single invariant $f = F_{\mu\nu} F^{\mu\nu}$. Static black
hole and solitonic solutions are briefly described, both with only an electric
or magnetic ... | [
{
"created": "Tue, 31 Oct 2017 20:09:03 GMT",
"version": "v1"
}
] | 2020-10-20 | [
[
"Bronnikov",
"K. A.",
""
]
] | We consider spherically symmetric configurations in general relativity, supported by nonlinear electromagnetic fields with gauge-invariant Lagrangians depending on the single invariant $f = F_{\mu\nu} F^{\mu\nu}$. Static black hole and solitonic solutions are briefly described, both with only an electric or magnetic ch... |
gr-qc/0703017 | Lorenzo Iorio | Lorenzo Iorio | The impact of the Kuiper Belt Objects and of the asteroid ring on future
high-precision relativistic Solar System tests | Latex2e, Elsevier macros, 5 pages, no figures, 1 table. To appear in
Planetary Space Science. Small change in table's caption | Planet.SpaceSci.55:2045-2048,2007 | 10.1016/j.pss.2007.07.004 | null | gr-qc astro-ph hep-ph physics.space-ph | null | We preliminarily investigate the impact of the Kuiper Belt Objects (KBOs) and
of the asteroid ring on some proposed high-precision tests of Newtonian and
post-Newtonian gravity to be performed in the Solar System by means of
spacecraft in heliocentric \approx 1 AU orbits and accurate orbit determination
of some of th... | [
{
"created": "Fri, 2 Mar 2007 15:37:58 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Mar 2007 15:20:08 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Apr 2007 18:15:55 GMT",
"version": "v3"
},
{
"created": "Fri, 1 Jun 2007 16:24:42 GMT",
"version": "v4"
},
{
"crea... | 2008-11-26 | [
[
"Iorio",
"Lorenzo",
""
]
] | We preliminarily investigate the impact of the Kuiper Belt Objects (KBOs) and of the asteroid ring on some proposed high-precision tests of Newtonian and post-Newtonian gravity to be performed in the Solar System by means of spacecraft in heliocentric \approx 1 AU orbits and accurate orbit determination of some of the ... |
1906.12185 | Sarbari Guha Dr. | Samarjit Chakraborty, Sarbari Guha and D. Panigrahi | Evolution of FRW universe in variable modified Chaplygin gas model | 9 pages, 11 figures, 1 table | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the evolution of the FRW universe filled with variable
modified Chaplygin gas (VMCG). We begin with a thermodynamical treatment of
VMCG described by the equation of state $P = A\rho-B\rho^{-\alpha}$, and obtain
its temperature as a function of redshift $z$. We show that the results are
consiste... | [
{
"created": "Thu, 27 Jun 2019 12:04:45 GMT",
"version": "v1"
}
] | 2019-07-01 | [
[
"Chakraborty",
"Samarjit",
""
],
[
"Guha",
"Sarbari",
""
],
[
"Panigrahi",
"D.",
""
]
] | In this paper we study the evolution of the FRW universe filled with variable modified Chaplygin gas (VMCG). We begin with a thermodynamical treatment of VMCG described by the equation of state $P = A\rho-B\rho^{-\alpha}$, and obtain its temperature as a function of redshift $z$. We show that the results are consistent... |
1301.0821 | Adolfo Toloza Sr. | Adolfo Toloza, Jorge Zanelli | Cosmology with Scalar-Euler form Coupling | null | Class.Quant.Grav. 30 (2013) 135003 | 10.1088/0264-9381/30/13/135003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A coupling between the spacetime geometry and a scalar field involving the
Euler four-form can have important consequences in General Relativity. The
coupling is a four-dimensional version of the Jackiw-Teitelboim action, in
which a scalar couples to the Euler two-form in two dimensions. In this case
the first order ... | [
{
"created": "Fri, 4 Jan 2013 20:46:19 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Jan 2013 02:18:58 GMT",
"version": "v2"
},
{
"created": "Wed, 15 May 2013 01:18:43 GMT",
"version": "v3"
}
] | 2014-09-30 | [
[
"Toloza",
"Adolfo",
""
],
[
"Zanelli",
"Jorge",
""
]
] | A coupling between the spacetime geometry and a scalar field involving the Euler four-form can have important consequences in General Relativity. The coupling is a four-dimensional version of the Jackiw-Teitelboim action, in which a scalar couples to the Euler two-form in two dimensions. In this case the first order fo... |
1005.2953 | S Habib Mazharimousavi | S. Habib Mazharimousavi, M. Halilsoy and Z. Amirabi | d-dimensional non-asymptotically flat thin-shell wormholes in
Einstein-Yang-Mills-Dilaton gravity | 6 pages, 5 figures. Title changed, the first version has been
generalized to d-dimensions. The EYMGB part was removed and was considered in
a more general form separately in arXiv:1007.4627 | Phys.Lett.A375:231-236,2011 | 10.1016/j.physleta.2010.11.012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Thin-shell wormholes in Einstein-Yang-Mills-dilaton (EYMD) gravity are
considered. We show that a non-asymptotically flat (NAF) black hole solution of
the d-dimensional EYMD theory provides stable thin-shell wormholes which are
supported entirely by exotic matter. The presence of dilaton makes the
spacetime naturally... | [
{
"created": "Mon, 17 May 2010 15:29:06 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Sep 2010 13:19:36 GMT",
"version": "v2"
},
{
"created": "Mon, 3 Jan 2011 15:51:21 GMT",
"version": "v3"
}
] | 2011-01-17 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
],
[
"Amirabi",
"Z.",
""
]
] | Thin-shell wormholes in Einstein-Yang-Mills-dilaton (EYMD) gravity are considered. We show that a non-asymptotically flat (NAF) black hole solution of the d-dimensional EYMD theory provides stable thin-shell wormholes which are supported entirely by exotic matter. The presence of dilaton makes the spacetime naturally N... |
gr-qc/0104012 | Hiroyuki Nakano | Hiroyuki Nakano, Yasushi Mino, Misao Sasaki | Self-Force on a Scalar Charge in Circular Orbit around a Schwarzschild
Black Hole | 16 pages, no figure, Minor typos corrected | Prog.Theor.Phys.106:339-362,2001 | 10.1143/PTP.106.339 | null | gr-qc astro-ph hep-th | null | In an accompanying paper, we have formulated two types of regulariz_ation
methods to calculate the scalar self-force on a particle of charge $q$ moving
around a black hole of mass $M$, one of which is called the ``power expansion
regularization''. In this paper, we analytically evaluate the self-force (which
we also ... | [
{
"created": "Wed, 4 Apr 2001 05:54:00 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Apr 2001 06:18:03 GMT",
"version": "v2"
}
] | 2009-10-09 | [
[
"Nakano",
"Hiroyuki",
""
],
[
"Mino",
"Yasushi",
""
],
[
"Sasaki",
"Misao",
""
]
] | In an accompanying paper, we have formulated two types of regulariz_ation methods to calculate the scalar self-force on a particle of charge $q$ moving around a black hole of mass $M$, one of which is called the ``power expansion regularization''. In this paper, we analytically evaluate the self-force (which we also ca... |
2408.02895 | Matthew Charles Edwards | Tarin Eccleston and Matthew C. Edwards | A generative adversarial network for stellar core-collapse
gravitational-waves | 12 pages, 7 figures | null | null | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a rapid stellar core-collapse waveform emulator built using a deep
convolutional generative adversarial network (DCGAN). The DCGAN was trained on
the Richers \textit{et al.~}\cite{richers:2017} waveform catalogue to learn the
structure of rotating stellar core-collapse gravitational-wave signals and
genera... | [
{
"created": "Tue, 6 Aug 2024 02:00:21 GMT",
"version": "v1"
}
] | 2024-08-07 | [
[
"Eccleston",
"Tarin",
""
],
[
"Edwards",
"Matthew C.",
""
]
] | We present a rapid stellar core-collapse waveform emulator built using a deep convolutional generative adversarial network (DCGAN). The DCGAN was trained on the Richers \textit{et al.~}\cite{richers:2017} waveform catalogue to learn the structure of rotating stellar core-collapse gravitational-wave signals and generate... |
1510.06217 | Chongoh Lee | Chong Oh Lee | The Extended Thermodynamic Properties of a topological Taub-NUT/Bolt-AdS
spaces | 7 pages, 6 figures, typos corrected, version to appear in PLB | null | 10.1016/j.physletb.2015.12.050 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | We consider higher dimensional topological Taub-NUT/Bolt-AdS solutions where
a cosmological constant is treated as a pressure. The thermodynamic quantities
of these solutions are explicitly calculated. Furthermore, we find these
thermodynamic quantities satisfy the Clapeyron equation. In particular, a new
thermodynam... | [
{
"created": "Wed, 21 Oct 2015 11:36:52 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Dec 2015 05:05:36 GMT",
"version": "v2"
}
] | 2015-12-29 | [
[
"Lee",
"Chong Oh",
""
]
] | We consider higher dimensional topological Taub-NUT/Bolt-AdS solutions where a cosmological constant is treated as a pressure. The thermodynamic quantities of these solutions are explicitly calculated. Furthermore, we find these thermodynamic quantities satisfy the Clapeyron equation. In particular, a new thermodynamic... |
2206.03146 | Prashant Kocherlakota | Prashant Kocherlakota and Luciano Rezzolla | Comment on the Analytical Bounds in the Rezzolla-Zhidenko
Parametrization | 2 pages | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | In this short note, we briefly comment on the analytical bounds that must be
imposed on the parameter space of the Rezzolla-Zhidenko (RZ)
metric-parametrization approach introduced in Ref. [1]. We hope this will
clarify some of the confusion recently emerged on this issue [2].
| [
{
"created": "Tue, 7 Jun 2022 09:40:09 GMT",
"version": "v1"
}
] | 2022-06-08 | [
[
"Kocherlakota",
"Prashant",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | In this short note, we briefly comment on the analytical bounds that must be imposed on the parameter space of the Rezzolla-Zhidenko (RZ) metric-parametrization approach introduced in Ref. [1]. We hope this will clarify some of the confusion recently emerged on this issue [2]. |
gr-qc/9807028 | Tevian Dray | Jim Fischer and Tevian Dray | A New Look at the Ashtekar-Magnon Energy Condition | REVTeX, 10 pages | Gen.Rel.Grav. 31 (1999) 511-526 | 10.1023/A:1026694106351 | null | gr-qc | null | In 1975, Ashtekar and Magnon showed that an energy condition selects a unique
quantization procedure for certain observers in general, curved spacetimes. We
generalize this result in two important ways, by eliminating the need to assume
a particular form for the (quantum) Hamiltonian, and by considering the
surprisin... | [
{
"created": "Tue, 14 Jul 1998 18:08:34 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Fischer",
"Jim",
""
],
[
"Dray",
"Tevian",
""
]
] | In 1975, Ashtekar and Magnon showed that an energy condition selects a unique quantization procedure for certain observers in general, curved spacetimes. We generalize this result in two important ways, by eliminating the need to assume a particular form for the (quantum) Hamiltonian, and by considering the surprisingl... |
2403.07045 | Lidia J. Gomes Da Silva Miss | Juan A. Valiente Kroon, Lidia J. Gomes Da Silva | The \v{d}Alembert solution in hyperboloidal foliations | 15 pages, 7 figures. Submitted to Springer's topical collection:
"Hyperboloidal foliations in the era of gravitational-wave astronomy: from
mathematical relativity to astrophysics". Comments welcomed | null | null | null | gr-qc astro-ph.IM math-ph math.MP physics.comp-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explicitly construct the analogue of the \v{d}Alembert solution to the 1+1
wave equation in an hyperboloidal setting. This hyperboloidal \v{d}Alembert
solution is used, in turn, to gain intuition into the behaviour of solutions to
the wave equation in a hyperboloidal foliation and to explain some apparently
anomal... | [
{
"created": "Mon, 11 Mar 2024 18:00:00 GMT",
"version": "v1"
}
] | 2024-03-13 | [
[
"Kroon",
"Juan A. Valiente",
""
],
[
"Da Silva",
"Lidia J. Gomes",
""
]
] | We explicitly construct the analogue of the \v{d}Alembert solution to the 1+1 wave equation in an hyperboloidal setting. This hyperboloidal \v{d}Alembert solution is used, in turn, to gain intuition into the behaviour of solutions to the wave equation in a hyperboloidal foliation and to explain some apparently anomalou... |
1212.1769 | H.-J. Schmidt | H.-J. Schmidt and D. Singleton | Isotropic universe with almost scale-invariant fourth-order gravity | several revisions included, 28 pages, J. Math. Phys. accepted | J.Math.Phys. 54 (2013) 062502 | 10.1063/1.4808255 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a broad class of isotropic vacuum cosmologies in fourth-order
gravity under the condition that the gravitational Lagrangian be
scale-invariant or almost scale-invariant. The gravitational Lagrangians
considered will be of the form L = f(R) + k(G) where R and G are the Ricci and
Gauss-Bonnet scalars respectiv... | [
{
"created": "Sat, 8 Dec 2012 08:52:35 GMT",
"version": "v1"
},
{
"created": "Thu, 16 May 2013 19:55:21 GMT",
"version": "v2"
}
] | 2013-06-12 | [
[
"Schmidt",
"H. -J.",
""
],
[
"Singleton",
"D.",
""
]
] | We study a broad class of isotropic vacuum cosmologies in fourth-order gravity under the condition that the gravitational Lagrangian be scale-invariant or almost scale-invariant. The gravitational Lagrangians considered will be of the form L = f(R) + k(G) where R and G are the Ricci and Gauss-Bonnet scalars respectivel... |
0711.1004 | J. Ponce de Leon | J. Ponce de Leon | The principle of least action for test particles in a four-dimensional
spacetime embedded in 5D | null | Mod.Phys.Lett.A23:249-259,2008 | 10.1142/S0217732308026376 | null | gr-qc | null | It is well known that, in the five-dimensional scenario of braneworld and
space-time-mass theories, geodesic motion in 5D is observed to be non-geodesic
in 4D. Usually, the discussion is purely geometric and based on the dimensional
reduction of the geodesic equation in 5D, without any reference to the test
particle ... | [
{
"created": "Wed, 7 Nov 2007 03:58:06 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"de Leon",
"J. Ponce",
""
]
] | It is well known that, in the five-dimensional scenario of braneworld and space-time-mass theories, geodesic motion in 5D is observed to be non-geodesic in 4D. Usually, the discussion is purely geometric and based on the dimensional reduction of the geodesic equation in 5D, without any reference to the test particle wh... |
0812.0702 | Jakob Hansen | Andrey Doroshkevich, Jakob Hansen, Igor Novikov, Alexander Shatskiy | Passage of radiation through wormholes | 18 Pages, 13 figures, minor typos corrected, updated references | Int.J.Mass Spectr.Ion Process.18:1665-1691,2009 | 10.1142/S0218271809015230 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate numerically the process of the passage of a radiation pulse
through a wormhole and the subsequent evolution of the wormhole that is caused
by the gravitational action of this pulse. The initial static wormhole is
modeled by the spherically symmetrical Armendariz-Picon solution with zero
mass. The radia... | [
{
"created": "Wed, 3 Dec 2008 12:11:21 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Jan 2009 11:19:35 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Doroshkevich",
"Andrey",
""
],
[
"Hansen",
"Jakob",
""
],
[
"Novikov",
"Igor",
""
],
[
"Shatskiy",
"Alexander",
""
]
] | We investigate numerically the process of the passage of a radiation pulse through a wormhole and the subsequent evolution of the wormhole that is caused by the gravitational action of this pulse. The initial static wormhole is modeled by the spherically symmetrical Armendariz-Picon solution with zero mass. The radiati... |
1310.5029 | Fernando Oscar Minotti | F. O. Minotti and T. E. Raptis | Transient force effects, as predicted by Mbelek and Lachi\`{e}ze-Rey
scalar tensor theory of gravitation | 8 pages, 1 figure (minor corrections made) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The scalar-tensor theory of gravitation proposed by Mbelek and
Lachi\`{e}ze-Rey have been recently shown to lead to some remarkable effects
beyond those initially explored by its authors. These new effects include a
possible explanation of the forces measured in asymmetric resonant microwave
cavities, and the variati... | [
{
"created": "Fri, 18 Oct 2013 14:17:47 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Dec 2013 19:55:16 GMT",
"version": "v2"
}
] | 2013-12-12 | [
[
"Minotti",
"F. O.",
""
],
[
"Raptis",
"T. E.",
""
]
] | The scalar-tensor theory of gravitation proposed by Mbelek and Lachi\`{e}ze-Rey have been recently shown to lead to some remarkable effects beyond those initially explored by its authors. These new effects include a possible explanation of the forces measured in asymmetric resonant microwave cavities, and the variation... |
0807.0824 | Jose M. Martin-Garcia | David Brizuela, Jose M. Martin-Garcia, Guillermo A. Mena Marugan | xPert: Computer algebra for metric perturbation theory | 11 pages, 4 figures. Package can be downloaded from
http://metric.iem.csic.es/Martin-Garcia/xAct/xPert/ | Gen.Rel.Grav.41:2415-2431,2009 | 10.1007/s10714-009-0773-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the tensor computer algebra package xPert for fast construction
and manipulation of the equations of metric perturbation theory, around
arbitrary backgrounds. It is based on the combination of explicit combinatorial
formulas for the n-th order perturbation of curvature tensors and their gauge
changes, and ... | [
{
"created": "Sun, 6 Jul 2008 18:04:09 GMT",
"version": "v1"
}
] | 2009-09-28 | [
[
"Brizuela",
"David",
""
],
[
"Martin-Garcia",
"Jose M.",
""
],
[
"Marugan",
"Guillermo A. Mena",
""
]
] | We present the tensor computer algebra package xPert for fast construction and manipulation of the equations of metric perturbation theory, around arbitrary backgrounds. It is based on the combination of explicit combinatorial formulas for the n-th order perturbation of curvature tensors and their gauge changes, and th... |
2011.07079 | Carlos Molina Mendes | F. Ruiz, C. Molina, J. A. S. Lima | Dynamical model for primordial black holes | 14 pages, 8 figures | Physical Review D 102, 123516 (2020) | 10.1103/PhysRevD.102.123516 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | Primordial black holes are analytically and numerically discussed based on
the extended McVittie spacetime solution. By assuming that dark matter and
radiation are the only sources of energy accreted by the forming central
object, it is found that the black-hole mass evolution depends on the initial
mass of the seed,... | [
{
"created": "Fri, 13 Nov 2020 19:00:08 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Dec 2020 19:00:06 GMT",
"version": "v2"
}
] | 2020-12-09 | [
[
"Ruiz",
"F.",
""
],
[
"Molina",
"C.",
""
],
[
"Lima",
"J. A. S.",
""
]
] | Primordial black holes are analytically and numerically discussed based on the extended McVittie spacetime solution. By assuming that dark matter and radiation are the only sources of energy accreted by the forming central object, it is found that the black-hole mass evolution depends on the initial mass of the seed, t... |
1208.3927 | Frederic H. Vincent | Frederic H. Vincent, Eric Gourgoulhon, J\'er\^ome Novak | 3+1 geodesic equation and images in numerical spacetimes | 20 pages, 4 figures, accepted by CQG, with substantial improvements
from referees remarks | Class. Quantum Grav., 29, 245005 (2012) | 10.1088/0264-9381/29/24/245005 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The equations governing null and timelike geodesics are derived within the
3+1 formalism of general relativity. In addition to the particle's position,
they encompass an evolution equation for the particle's energy leading to a 3+1
expression of the redshift factor for photons. An important application is the
computa... | [
{
"created": "Mon, 20 Aug 2012 07:18:10 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Oct 2012 16:28:51 GMT",
"version": "v2"
}
] | 2012-12-18 | [
[
"Vincent",
"Frederic H.",
""
],
[
"Gourgoulhon",
"Eric",
""
],
[
"Novak",
"Jérôme",
""
]
] | The equations governing null and timelike geodesics are derived within the 3+1 formalism of general relativity. In addition to the particle's position, they encompass an evolution equation for the particle's energy leading to a 3+1 expression of the redshift factor for photons. An important application is the computati... |
2106.08954 | Grigory Volovik | G.E. Volovik | Type-II Weyl semimetal vs gravastar | 7 pages, 3 figures, version accepted in JETP Letters | null | 10.1134/S0021364021160013 | null | gr-qc cond-mat.str-el hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The boundary between the type I and type II Weyl semimetals serves as the
event horizon for the "relativistic" fermions. The interior of the black hole
is represented by the type II Weyl semimetal, where the Fermi surface is
formed. The process of the filling of the Fermi surface by electrons results in
the relaxatio... | [
{
"created": "Tue, 15 Jun 2021 15:44:54 GMT",
"version": "v1"
},
{
"created": "Sun, 27 Jun 2021 10:11:43 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Jul 2021 08:26:56 GMT",
"version": "v3"
},
{
"created": "Fri, 16 Jul 2021 09:16:06 GMT",
"version": "v4"
}
] | 2021-09-01 | [
[
"Volovik",
"G. E.",
""
]
] | The boundary between the type I and type II Weyl semimetals serves as the event horizon for the "relativistic" fermions. The interior of the black hole is represented by the type II Weyl semimetal, where the Fermi surface is formed. The process of the filling of the Fermi surface by electrons results in the relaxation ... |
1205.3893 | Shin'ichirou Yoshida | Shin'ichirou Yoshida | Non-axisymmetric oscillations of rapidly rotating relativistic stars by
conformal flatness approximation | 3 figures. To appear in Phys.Rev.D | null | 10.1103/PhysRevD.86.104055 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new numerical code to compute non-axisymmetric eigenmodes of
rapidly rotating relativistic stars by adopting spatially conformally flat
approximation of general relativity. The approximation suppresses the radiative
degree of freedom of relativistic gravity and the field equations are cast into
a set of ... | [
{
"created": "Thu, 17 May 2012 10:00:34 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Nov 2012 05:45:23 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Yoshida",
"Shin'ichirou",
""
]
] | We present a new numerical code to compute non-axisymmetric eigenmodes of rapidly rotating relativistic stars by adopting spatially conformally flat approximation of general relativity. The approximation suppresses the radiative degree of freedom of relativistic gravity and the field equations are cast into a set of el... |
gr-qc/0407033 | Pawe{\l} O. Mazur | George Chapline and Pawel O. Mazur (Lawrence Livermore National
Laboratory, University of South Carolina) | Superfluid Picture for Rotating Space-Times | 12 pages, LaTeX, Acta Physica Polonica B45, 2014; Dedicated to
Professor Andrzej Staruszkiewicz on the occasion of His birthday | null | null | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new prescription, in the framework of condensate models for space-times,
for physical stationary gravitational fields is presented. We show that the
spinning cosmic string metric describes the gravitational field associated with
the single vortex in a superfluid condensate model for space-time outside the
vortex co... | [
{
"created": "Thu, 8 Jul 2004 03:46:18 GMT",
"version": "v1"
},
{
"created": "Thu, 5 May 2005 17:51:04 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Mar 2014 22:48:42 GMT",
"version": "v3"
}
] | 2014-04-01 | [
[
"Chapline",
"George",
"",
"Lawrence Livermore National\n Laboratory, University of South Carolina"
],
[
"Mazur",
"Pawel O.",
"",
"Lawrence Livermore National\n Laboratory, University of South Carolina"
]
] | A new prescription, in the framework of condensate models for space-times, for physical stationary gravitational fields is presented. We show that the spinning cosmic string metric describes the gravitational field associated with the single vortex in a superfluid condensate model for space-time outside the vortex core... |
2307.14042 | Tomoya Kinugawa | Tomoya Kinugawa, Takashi Nakamura, and Hiroyuki Nakano | Mass Ratio of Binary Black Holes Determined from LIGO/Virgo Data
Restricted to Small False Alarm Rate | Comment welcome. accepted by MNRAS | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We focus on gravitational-wave events of binary black-hole mergers up to the
third observing run with the minimum false alarm rate smaller than
$10^{-5}\,{\rm yr}^{-1}$. These events tell us that the mass ratio of two black
holes follows $m_2/m_1=0.723$ with the chance probability of 0.00301% for the
chirp mass $M_{\... | [
{
"created": "Wed, 26 Jul 2023 08:48:35 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Jun 2024 09:44:32 GMT",
"version": "v2"
}
] | 2024-06-28 | [
[
"Kinugawa",
"Tomoya",
""
],
[
"Nakamura",
"Takashi",
""
],
[
"Nakano",
"Hiroyuki",
""
]
] | We focus on gravitational-wave events of binary black-hole mergers up to the third observing run with the minimum false alarm rate smaller than $10^{-5}\,{\rm yr}^{-1}$. These events tell us that the mass ratio of two black holes follows $m_2/m_1=0.723$ with the chance probability of 0.00301% for the chirp mass $M_{\rm... |
2201.05287 | Valerio Faraoni | Valerio Faraoni, Genevi\`eve Vachon, Robert Vanderwee, Sonia Jose | Friedmann-Lema\^itre-Robertson-Walker cosmology through the lens of
gravitoelectromagnetism | Introduction expanded and explanation added. Matches version in press
in Phys. Rev. D | null | 10.1103/PhysRevD.105.083530 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Friedmann-Lema\^itre-Robertson-Walker cosmology is examined from the point of
view of gravitoelectromagnetism, in the approximation of spacetime regions
small in comparison with the Hubble radius. The usual Lorentz gauge is not
appropriate for this situation, while the Painlev\'e-Gullstrand gauge is rather
natural. S... | [
{
"created": "Fri, 14 Jan 2022 03:16:40 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Apr 2022 01:16:36 GMT",
"version": "v2"
}
] | 2022-05-11 | [
[
"Faraoni",
"Valerio",
""
],
[
"Vachon",
"Geneviève",
""
],
[
"Vanderwee",
"Robert",
""
],
[
"Jose",
"Sonia",
""
]
] | Friedmann-Lema\^itre-Robertson-Walker cosmology is examined from the point of view of gravitoelectromagnetism, in the approximation of spacetime regions small in comparison with the Hubble radius. The usual Lorentz gauge is not appropriate for this situation, while the Painlev\'e-Gullstrand gauge is rather natural. Sev... |
1807.01100 | Federico Urban | Tom Z{\l}o\'snik, Federico Urban, Luca Marzola, Tomi Koivisto | Spacetime and dark matter from spontaneous breaking of Lorentz symmetry | v2 with minor edits, as published | null | 10.1088/1361-6382/aaea96 | NORDITA 2018-048 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that a spontaneously-broken gauge theory of the Lorentz group
contains Ashtekar's chiral formulation of General Relativity accompanied by
dust. From this perspective, gravity is described entirely by a connection
$\omega$ valued in the Lie algebra of the complexified Lorentz group and a
Lorentz-charged sc... | [
{
"created": "Tue, 3 Jul 2018 11:56:36 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Oct 2018 13:17:32 GMT",
"version": "v2"
}
] | 2018-10-30 | [
[
"Złośnik",
"Tom",
""
],
[
"Urban",
"Federico",
""
],
[
"Marzola",
"Luca",
""
],
[
"Koivisto",
"Tomi",
""
]
] | It is shown that a spontaneously-broken gauge theory of the Lorentz group contains Ashtekar's chiral formulation of General Relativity accompanied by dust. From this perspective, gravity is described entirely by a connection $\omega$ valued in the Lie algebra of the complexified Lorentz group and a Lorentz-charged scal... |
1412.2567 | Sunandan Gangopadhyay | Sunandan Gangopadhyay, Anirban Saha, S. Mukherjee | Emergent Universe with particle production | Addition made in the Acknowledgement | Int. J. Theo. Phys. 55 (2016) 4445 | 10.1007/s10773-016-3067-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The possibility of an emergent universe solution to Einstein's field
equations allowing for an irreversible creation of matter at the expense of the
gravitational field is shown. With the universe being chosen as spatially flat
FRW spacetime together with equation of state proposed in [17], the solution
exists when t... | [
{
"created": "Mon, 8 Dec 2014 14:02:14 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Sep 2016 13:23:22 GMT",
"version": "v2"
}
] | 2016-09-27 | [
[
"Gangopadhyay",
"Sunandan",
""
],
[
"Saha",
"Anirban",
""
],
[
"Mukherjee",
"S.",
""
]
] | The possibility of an emergent universe solution to Einstein's field equations allowing for an irreversible creation of matter at the expense of the gravitational field is shown. With the universe being chosen as spatially flat FRW spacetime together with equation of state proposed in [17], the solution exists when the... |
gr-qc/9908069 | Leonard Parker | Leonard Parker and Alpan Raval | Vacuum-driven Metamorphosis | 4 pages, 1 figure, revtex | null | null | WISC-MILW-99-TH-11 | gr-qc astro-ph hep-th quant-ph | null | We show that nonperturbative vacuum effects can produce a vacuum-driven
transition from a matter-dominated universe to one in which the effective
equation of state is that of radiation plus cosmological constant. The actual
material content of the universe after the transition remains that of
non-relativistic matter.... | [
{
"created": "Thu, 26 Aug 1999 17:29:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Parker",
"Leonard",
""
],
[
"Raval",
"Alpan",
""
]
] | We show that nonperturbative vacuum effects can produce a vacuum-driven transition from a matter-dominated universe to one in which the effective equation of state is that of radiation plus cosmological constant. The actual material content of the universe after the transition remains that of non-relativistic matter. T... |
1207.2733 | Alfredo Sandoval-Villalbazo | A. Sandoval-Villalbazo, A. L. Garcia-Perciante and D.Brun-Battistini | Tolman's law in linear irreversible thermodynamics: a kinetic theory
approach | 9 pages, one figure | Phys. Rev. D 86, 084015 (2012) | 10.1103/PhysRevD.86.084015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper it is shown that Tolman's law can be derived from relativistic
kinetic theory applied to a simple fluid in a BGK-like approximation. Using
this framework, it becomes clear that the contribution of the gravitational
field can be viewed as a cross effect that resembles the so-called
\emph{Thomson effect} ... | [
{
"created": "Tue, 10 Jul 2012 18:31:15 GMT",
"version": "v1"
}
] | 2012-10-08 | [
[
"Sandoval-Villalbazo",
"A.",
""
],
[
"Garcia-Perciante",
"A. L.",
""
],
[
"Brun-Battistini",
"D.",
""
]
] | In this paper it is shown that Tolman's law can be derived from relativistic kinetic theory applied to a simple fluid in a BGK-like approximation. Using this framework, it becomes clear that the contribution of the gravitational field can be viewed as a cross effect that resembles the so-called \emph{Thomson effect} in... |
gr-qc/0612130 | Angela Di Virgilio dr | A. Di Virgilio, S. Bigotta, L. Barsotti, S. Braccini, C. Bradaschia,
G. Cella, V. Dattilo, M. Del Prete, I. Ferrante, F. Fidecaro, I. Fiori, F.
Frasconi, A. Gennai, A. Giazotto, P. La Penna, G.Losurdo, E. Majorana, M.
Mantovani, F. Paoletti, R. Passaquieti, D. Passuello, F. Piergiovanni, A.
Porzio, P. Puppo, F.... | Displacement power spectrum measurement of a macroscopic optomechanical
system at thermal equilibrium | 11 pages, 9 figures, 2 tables, to be submitted | null | 10.1103/PhysRevD.76.122004 | null | gr-qc | null | The mirror relative motion of a suspended Fabry-Perot cavity is studied in
the frequency range 3-10 Hz. The experimental measurements presented in this
paper, have been performed at the Low Frequency Facility, a high finesse
optical cavity 1 cm long suspended to a mechanical seismic isolation system
identical to that... | [
{
"created": "Wed, 20 Dec 2006 18:12:49 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Dec 2006 08:10:43 GMT",
"version": "v2"
}
] | 2013-05-29 | [
[
"Di Virgilio",
"A.",
""
],
[
"Bigotta",
"S.",
""
],
[
"Barsotti",
"L.",
""
],
[
"Braccini",
"S.",
""
],
[
"Bradaschia",
"C.",
""
],
[
"Cella",
"G.",
""
],
[
"Dattilo",
"V.",
""
],
[
"Del Prete",
... | The mirror relative motion of a suspended Fabry-Perot cavity is studied in the frequency range 3-10 Hz. The experimental measurements presented in this paper, have been performed at the Low Frequency Facility, a high finesse optical cavity 1 cm long suspended to a mechanical seismic isolation system identical to that o... |
gr-qc/9807038 | Tomohiro Harada | Tomohiro Harada | Final fate of the spherically symmetric collapse of a perfect fluid | 17 pages, including 21 ps figures. Accepted for publication in
Physical Review D, Typos corrected, References updated | Phys.Rev. D58 (1998) 104015 | 10.1103/PhysRevD.58.104015 | KUNS-1518 | gr-qc astro-ph | null | The final fate of the spherically symmetric collapse of a perfect fluid which
follows the $\gamma$-law equation of state and adiabatic condition is
investigated. Full general relativistic hydrodynamics is solved numerically
using a retarded time coordinate, the so-called observer time coordinate.
Thanks to this coord... | [
{
"created": "Thu, 16 Jul 1998 05:29:48 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Sep 1998 07:53:40 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Harada",
"Tomohiro",
""
]
] | The final fate of the spherically symmetric collapse of a perfect fluid which follows the $\gamma$-law equation of state and adiabatic condition is investigated. Full general relativistic hydrodynamics is solved numerically using a retarded time coordinate, the so-called observer time coordinate. Thanks to this coordin... |
1412.5045 | Roberto Chan | O. Goldoni, M.F.A. da Silva, R. Chan and G. Pinheiro | Vaidya Solution in General Covariant Ho\v{r}ava-Lifshitz Gravity with
the Minimum Coupling and without Projectability: Infrared Limit | 11 pages. Accepted for publication in IJMPD | International Journal Modern Physics D 245, 21 (2015) | 10.1142/S0218271815500212 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have studied nonstationary radiative spherically symmetric
spacetime, in general covariant theory ($U(1)$ extension) of {the}
Ho\v{r}ava-Lifshitz gravity with the minimum coupling, in the post-newtonian
approximation (PPN), without the projectability condition and in the infrared
limit. The Newtonia... | [
{
"created": "Tue, 16 Dec 2014 15:30:37 GMT",
"version": "v1"
}
] | 2016-02-09 | [
[
"Goldoni",
"O.",
""
],
[
"da Silva",
"M. F. A.",
""
],
[
"Chan",
"R.",
""
],
[
"Pinheiro",
"G.",
""
]
] | In this paper, we have studied nonstationary radiative spherically symmetric spacetime, in general covariant theory ($U(1)$ extension) of {the} Ho\v{r}ava-Lifshitz gravity with the minimum coupling, in the post-newtonian approximation (PPN), without the projectability condition and in the infrared limit. The Newtonian ... |
1803.10770 | Antonio Candido de Siqueira V. V. | A.C.V.V. de Siqueira | Topics in Non-Riemannian Geometry | 11 pages, no figures, last version | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we present some new results on non-Riemannian geometry, more
specifically, asymmetric connections and Weyl's geometry. For asymmetric
connections, we show that a projective change in the symmetric part generates a
vector field that its not arbitrary, as usually presented, but rather, the
gradient of a ... | [
{
"created": "Wed, 28 Mar 2018 15:02:04 GMT",
"version": "v1"
},
{
"created": "Sat, 31 Mar 2018 14:06:56 GMT",
"version": "v2"
}
] | 2018-04-03 | [
[
"de Siqueira",
"A. C. V. V.",
""
]
] | In this paper, we present some new results on non-Riemannian geometry, more specifically, asymmetric connections and Weyl's geometry. For asymmetric connections, we show that a projective change in the symmetric part generates a vector field that its not arbitrary, as usually presented, but rather, the gradient of a no... |
1303.2436 | \"Ozcan Sert | \"Ozcan Sert | Electromagnetic Duality and New Solutions of the Non-minimally Coupled
Y(R)-Maxwell Gravity | 10 pages, accepted for publication in MPLA | Mod. Phys. Lett. A 2013 | 10.1142/S0217732313500491 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Non-minimally coupled Y(R)-Maxwell gravity which have some interesting
solutions may be used to understand dark matter, dark energy, the origin of
cosmic magnetic field and the evaluation of the universe. We give some new
solutions to the model such as spherically symmetric electric, magnetic and
dyon solutions. We p... | [
{
"created": "Mon, 11 Mar 2013 06:29:53 GMT",
"version": "v1"
}
] | 2013-04-09 | [
[
"Sert",
"Özcan",
""
]
] | Non-minimally coupled Y(R)-Maxwell gravity which have some interesting solutions may be used to understand dark matter, dark energy, the origin of cosmic magnetic field and the evaluation of the universe. We give some new solutions to the model such as spherically symmetric electric, magnetic and dyon solutions. We poi... |
1909.03055 | Sergio Servidio | C. Meringolo, S. Servidio, P. Veltri | A spectral approach to numerical simulations of the ADM equations | arXiv admin note: text overlap with arXiv:gr-qc/0305023 by other
authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a numerical study of the Einstein equations, according to the
Arnowitt-Deser-Misner (ADM) formalism, in order to simulate the dynamics of
gravitational fields. We took in consideration the original $3+1$ decomposition
of the ADM equations, in vacuum conditions, in simplified geometries. The
numerical code ... | [
{
"created": "Fri, 6 Sep 2019 11:43:33 GMT",
"version": "v1"
}
] | 2019-09-10 | [
[
"Meringolo",
"C.",
""
],
[
"Servidio",
"S.",
""
],
[
"Veltri",
"P.",
""
]
] | We present a numerical study of the Einstein equations, according to the Arnowitt-Deser-Misner (ADM) formalism, in order to simulate the dynamics of gravitational fields. We took in consideration the original $3+1$ decomposition of the ADM equations, in vacuum conditions, in simplified geometries. The numerical code is... |
1809.00844 | Daniela Doneva | Daniela D. Doneva, Stella Kiorpelidi, Petya G. Nedkova, Eleftherios
Papantonopoulos, Stoytcho S. Yazadjiev | Charged Gauss-Bonnet black holes with curvature induced scalarization in
the extended scalar-tensor theories | 20 pages, 7 figures | Phys. Rev. D 98, 104056 (2018) | 10.1103/PhysRevD.98.104056 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently new scalarized black hole solutions were constructed in the extended
scalar-tensor-Gauss-Bonnet gravity, where the scalar field is sourced by the
curvature of the spacetime via the Gauss-Bonnet invariant. A natural extension
of these results is to consider the case of nonzero black hole charge. In
addition w... | [
{
"created": "Tue, 4 Sep 2018 08:57:54 GMT",
"version": "v1"
}
] | 2018-12-05 | [
[
"Doneva",
"Daniela D.",
""
],
[
"Kiorpelidi",
"Stella",
""
],
[
"Nedkova",
"Petya G.",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | Recently new scalarized black hole solutions were constructed in the extended scalar-tensor-Gauss-Bonnet gravity, where the scalar field is sourced by the curvature of the spacetime via the Gauss-Bonnet invariant. A natural extension of these results is to consider the case of nonzero black hole charge. In addition we ... |
2408.04004 | Anna Tokareva | Andrea Addazi, Alexey S. Koshelev, Shi Pi, Anna Tokareva | Secondary Gravitational Waves in Non-local Starobinsky inflation | 17 pages, 3 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | We show how infinite derivative modifications of gravity impact on the
stochastic background of Gravitational Waves from early Universe. The generic
property of the ghost-free theory fixed on Minkowski space-time is the
emergence of an infinite number of complex mass states when other classical
backgrounds are consid... | [
{
"created": "Wed, 7 Aug 2024 18:00:06 GMT",
"version": "v1"
}
] | 2024-08-09 | [
[
"Addazi",
"Andrea",
""
],
[
"Koshelev",
"Alexey S.",
""
],
[
"Pi",
"Shi",
""
],
[
"Tokareva",
"Anna",
""
]
] | We show how infinite derivative modifications of gravity impact on the stochastic background of Gravitational Waves from early Universe. The generic property of the ghost-free theory fixed on Minkowski space-time is the emergence of an infinite number of complex mass states when other classical backgrounds are consider... |
0811.0012 | David Kubiznak | David Kubiznak, Valeri P. Frolov, Pavel Krtous, Patrick Connell | Parallel-propagated frame along null geodesics in higher-dimensional
black hole spacetimes | 17 pages, no figures | Phys.Rev.D79:024018,2009 | 10.1103/PhysRevD.79.024018 | Alberta-Thy-08-08, DAMTP-2008-97 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In [arXiv:0803.3259] the equations describing the parallel transport of
orthonormal frames along timelike (spacelike) geodesics in a spacetime
admitting a non-degenerate principal conformal Killing-Yano 2-form h were
solved. The construction employed is based on studying the Darboux subspaces of
the 2-form F obtained... | [
{
"created": "Fri, 31 Oct 2008 20:46:04 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Kubiznak",
"David",
""
],
[
"Frolov",
"Valeri P.",
""
],
[
"Krtous",
"Pavel",
""
],
[
"Connell",
"Patrick",
""
]
] | In [arXiv:0803.3259] the equations describing the parallel transport of orthonormal frames along timelike (spacelike) geodesics in a spacetime admitting a non-degenerate principal conformal Killing-Yano 2-form h were solved. The construction employed is based on studying the Darboux subspaces of the 2-form F obtained a... |
2106.02057 | Merced Montesinos | Merced Montesinos, Ricardo Escobedo, Mariano Celada | Straightforward Hamiltonian analysis of $BF$ gravity in $n$ dimensions | It matches published version. arXiv admin note: text overlap with
arXiv:2010.14526 | Gen. Relativ. Gravit. 53, 52 (2021) | 10.1007/s10714-021-02821-3 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform, in a manifestly $SO(n-1,1)$ [$SO(n)$] covariant fashion, the
Hamiltonian analysis of general relativity in $n$ dimensions written as a
constrained $BF$ theory. We solve the constraint on the $B$ field in a way
naturally adapted to the foliation of the spacetime that avoids explicitly the
introduction of t... | [
{
"created": "Thu, 3 Jun 2021 18:00:22 GMT",
"version": "v1"
}
] | 2021-06-07 | [
[
"Montesinos",
"Merced",
""
],
[
"Escobedo",
"Ricardo",
""
],
[
"Celada",
"Mariano",
""
]
] | We perform, in a manifestly $SO(n-1,1)$ [$SO(n)$] covariant fashion, the Hamiltonian analysis of general relativity in $n$ dimensions written as a constrained $BF$ theory. We solve the constraint on the $B$ field in a way naturally adapted to the foliation of the spacetime that avoids explicitly the introduction of the... |
2108.08206 | Farhad Darabi | F. Gholami, F. Darabi, and A. Haji Badali | On Einstein equations with cosmological constant in braneworld models | 7 pages | Indian. J. Phys (2021) | 10.1007/s12648-020-01995-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the Einstein equations with cosmological
constant for Randall-Sundrum (RS) and Dvali-Gabadadze-Porrati (DGP) models to
determine the warp functions in the context of warp product spacetimes. In RS
model, it is shown that Einstein's equation in the bulk is reduced into the
brane as a vacu... | [
{
"created": "Tue, 17 Aug 2021 12:16:30 GMT",
"version": "v1"
}
] | 2021-08-19 | [
[
"Gholami",
"F.",
""
],
[
"Darabi",
"F.",
""
],
[
"Badali",
"A. Haji",
""
]
] | In this paper, we investigate the Einstein equations with cosmological constant for Randall-Sundrum (RS) and Dvali-Gabadadze-Porrati (DGP) models to determine the warp functions in the context of warp product spacetimes. In RS model, it is shown that Einstein's equation in the bulk is reduced into the brane as a vacuum... |
gr-qc/0203033 | Martin Tajmar | M. Tajmar, C.J. de Matos | Gravitomagnetic Field of a Rotating Superconductor and of a Rotating
Superfluid | null | Physica C385:551-554,2003 | 10.1016/S0921-4534(02)02305-5 | null | gr-qc | null | The quantization of the extended canonical momentum in quantum materials
including the effects of gravitational drag is applied successively to the case
of a multiply connected rotating superconductor and superfluid. Experiments
carried out on rotating superconductors, based on the quantization of the
magnetic flux i... | [
{
"created": "Mon, 11 Mar 2002 13:36:20 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Tajmar",
"M.",
""
],
[
"de Matos",
"C. J.",
""
]
] | The quantization of the extended canonical momentum in quantum materials including the effects of gravitational drag is applied successively to the case of a multiply connected rotating superconductor and superfluid. Experiments carried out on rotating superconductors, based on the quantization of the magnetic flux in ... |
1408.0516 | Fatemeh Bagheri | Fatemeh Bagheri, Reza Mansouri | The symmetry of the energy momentum tensor does not necessarily reflect
the space-time symmetry: a viscous axially symmetric cosmological solution | 9 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Applying the method of conformal metric to a given static axially symmetric
vacuum solution of the Einstein equations, we have shown that there is no
solution representing a cosmic ideal fluid which is asymtotically FLRW. Letting
the cosmic fluid to be imperfect there are axially symmetric solutions tending
to FLRW a... | [
{
"created": "Sun, 3 Aug 2014 17:21:18 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Sep 2019 18:02:47 GMT",
"version": "v2"
}
] | 2019-09-09 | [
[
"Bagheri",
"Fatemeh",
""
],
[
"Mansouri",
"Reza",
""
]
] | Applying the method of conformal metric to a given static axially symmetric vacuum solution of the Einstein equations, we have shown that there is no solution representing a cosmic ideal fluid which is asymtotically FLRW. Letting the cosmic fluid to be imperfect there are axially symmetric solutions tending to FLRW at ... |
gr-qc/0412083 | Tatyana P. Shestakova | T. P. Shestakova | The prospects for extended phase space approach to quantization of
gravity | 11 pages, talk presented at the VI International Conference on
cosmoparticle physics "Cosmion-2004", September 2004 | Grav.Cosmol. 11 (2005) 183-188 | null | null | gr-qc | null | A brief review of main features of the new approach named ``quantum
geometrodynamics in extended phase space'' is given and its possible prospects
are discussed. Gauge degrees of freedom are treated as a subsystem of the
Universe which affects the evolution of the physical subsystem. Three points
can be singled out w... | [
{
"created": "Fri, 17 Dec 2004 12:26:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Shestakova",
"T. P.",
""
]
] | A brief review of main features of the new approach named ``quantum geometrodynamics in extended phase space'' is given and its possible prospects are discussed. Gauge degrees of freedom are treated as a subsystem of the Universe which affects the evolution of the physical subsystem. Three points can be singled out whe... |
1303.2243 | Roldao da Rocha | D. Bazeia, J. M. Hoff da SIlva, Roldao da Rocha | Black holes in realistic branes: black string-like objects? | 7 pages, 6 figures, to appear in Phys. Lett. B | Phys. Lett. B 721 (2013) 306 | 10.1016/j.physletb.2013.03.010 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A realistic model describing a black string-like object in an expanding
Universe is analyzed in the context of the McVittie's solution of the Einstein
field equations. The bulk metric near the brane is provided analogously to
previous solutions for black strings. In particular, we show that at least when
the Hubble p... | [
{
"created": "Sat, 9 Mar 2013 17:54:54 GMT",
"version": "v1"
}
] | 2013-04-12 | [
[
"Bazeia",
"D.",
""
],
[
"da SIlva",
"J. M. Hoff",
""
],
[
"da Rocha",
"Roldao",
""
]
] | A realistic model describing a black string-like object in an expanding Universe is analyzed in the context of the McVittie's solution of the Einstein field equations. The bulk metric near the brane is provided analogously to previous solutions for black strings. In particular, we show that at least when the Hubble par... |
gr-qc/9402024 | null | Edward Malec (Physics Department, UCC, Cork, Ireland and Institute of
Physics, UJ 30-059 Cracow, Reymonta) | Event horizons and apparent horizons in spherically symmetric geometries | 4, Poland July 1993, 24 pages, latex | Phys.Rev.D49:6475-6483,1994 | 10.1103/PhysRevD.49.6475 | null | gr-qc | null | Spherical configurations that are very massive must be surrounded by apparent
horizons. These in turn, when placed outside a collapsing body, have a fixed
area and must propagate outward with a velocity equal to the velocity of
radially outgoing photons. That proves, within the framework of the (1+3)
formalism and wi... | [
{
"created": "Fri, 11 Feb 1994 11:30:43 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Malec",
"Edward",
"",
"Physics Department, UCC, Cork, Ireland and Institute of\n Physics, UJ 30-059 Cracow, Reymonta"
]
] | Spherical configurations that are very massive must be surrounded by apparent horizons. These in turn, when placed outside a collapsing body, have a fixed area and must propagate outward with a velocity equal to the velocity of radially outgoing photons. That proves, within the framework of the (1+3) formalism and with... |
1803.06640 | Dheeraj Kumar Mishra | Dheeraj Kumar Mishra and Nitin Chandra | Invariant ultraviolet scale corrections to the thermodynamics of
degenerate Fermi gas and its implications | 35 pages, 7 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the invariant Planck scale correction to the thermodynamics of the
ideal Fermi gas. We have considered the modified dispersion relation and the
cut-off to the maximum possible momentum/energy (Planck energy) of the
non-interacting ideal degenerate Fermi gas particles. With such a modification
the expression ... | [
{
"created": "Sun, 18 Mar 2018 10:52:36 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jul 2019 11:43:25 GMT",
"version": "v2"
}
] | 2019-07-10 | [
[
"Mishra",
"Dheeraj Kumar",
""
],
[
"Chandra",
"Nitin",
""
]
] | We study the invariant Planck scale correction to the thermodynamics of the ideal Fermi gas. We have considered the modified dispersion relation and the cut-off to the maximum possible momentum/energy (Planck energy) of the non-interacting ideal degenerate Fermi gas particles. With such a modification the expression fo... |
2110.00648 | James Read | Niels Linnemann and James Read | Comment on `Do electromagnetic waves always propagate along null
geodesics?' | Forthcoming in Classical and Quantum Gravity. Title different but
otherwise unaltered from previous version | null | 10.1088/1361-6382/ac2c19 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study the propagation of Maxwellian electromagnetic waves in curved
spacetimes in terms of the appropriate geometrical optics limit, notions of
signal speed, and minimal coupling prescription from Maxwellian theory in flat
spacetime. In the course of this, we counter a recent major claim by Asenjo and
Hojman (2017... | [
{
"created": "Fri, 1 Oct 2021 20:54:27 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Dec 2021 07:47:40 GMT",
"version": "v2"
}
] | 2021-12-22 | [
[
"Linnemann",
"Niels",
""
],
[
"Read",
"James",
""
]
] | We study the propagation of Maxwellian electromagnetic waves in curved spacetimes in terms of the appropriate geometrical optics limit, notions of signal speed, and minimal coupling prescription from Maxwellian theory in flat spacetime. In the course of this, we counter a recent major claim by Asenjo and Hojman (2017) ... |
gr-qc/9906003 | Yee J. Ng | Y. Jack Ng and H. van Dam (University of North Carolina) | Measuring the foaminess of space-time with gravity-wave interferometers | 15 pages, TeX, A simple connection to the holographic principle is
added, minor changes in the text and abstract, and some changes in the
References; this new version will appear in the third "Haller" issue in
Foundations of Physics | Found.Phys.30:795-805,2000 | 10.1023/A:1003745212871 | null | gr-qc astro-ph hep-ph hep-th quant-ph | null | By analyzing a gedanken experiment designed to measure the distance $l$
between two spatially separated points, we find that this distance cannot be
measured with uncertainty less than $(ll_P^2)^{1/3}$, considerably larger than
the Planck scale $l_P$ (or the string scale in string theories), the
conventional wisdom u... | [
{
"created": "Tue, 1 Jun 1999 18:57:20 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Mar 2000 19:07:12 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Ng",
"Y. Jack",
"",
"University of North Carolina"
],
[
"van Dam",
"H.",
"",
"University of North Carolina"
]
] | By analyzing a gedanken experiment designed to measure the distance $l$ between two spatially separated points, we find that this distance cannot be measured with uncertainty less than $(ll_P^2)^{1/3}$, considerably larger than the Planck scale $l_P$ (or the string scale in string theories), the conventional wisdom unc... |
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