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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1107.0694 | Eduardo Rodrigues | H. P. de Oliveira, E. L. Rodrigues and J. E. F. Skea | Numerical evolution of general Robinson-Trautman spacetimes: code tests,
wave forms and the efficiency of the gravitational wave extraction | 12 pages, 5 figures. To appear in Physical Review D | Phys.Rev.D84:044007,2011 | 10.1103/PhysRevD.84.044007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an efficient numerical code based on spectral methods to integrate
the field equations of general Robinson-Trautmann spacetimes. The most natural
basis functions for the spectral expansion of the metric functions are
spherical harmonics. Using the values of appropriate combinations of the metric
functions ... | [
{
"created": "Mon, 4 Jul 2011 18:11:53 GMT",
"version": "v1"
}
] | 2011-11-10 | [
[
"de Oliveira",
"H. P.",
""
],
[
"Rodrigues",
"E. L.",
""
],
[
"Skea",
"J. E. F.",
""
]
] | We present an efficient numerical code based on spectral methods to integrate the field equations of general Robinson-Trautmann spacetimes. The most natural basis functions for the spectral expansion of the metric functions are spherical harmonics. Using the values of appropriate combinations of the metric functions at... |
0809.3564 | Lorenzo Iorio | Lorenzo Iorio | On the impact of the atmospheric drag on the LARES mission | Latex2e, 19 pages, 2 tables, no figures. Final version to appear in
Acta Physica Polonica (AcPP). | Acta Phys. Polon.B41:753-765,2010 | null | null | gr-qc astro-ph astro-ph.EP physics.geo-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The goal of the recently approved space-based LARES mission is to measure the
general relativistic Lense-Thirring effect in the gravitational field of the
spinning Earth at a repeatedly claimed 1% accuracy by combining its node Omega
with those of the existing LAGEOS and LAGEOS II laser-ranged satellites. In
this pap... | [
{
"created": "Sun, 21 Sep 2008 09:02:04 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Oct 2008 13:55:20 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Oct 2009 07:16:20 GMT",
"version": "v3"
},
{
"created": "Wed, 17 Mar 2010 16:35:54 GMT",
"version": "v4"
}
] | 2010-04-28 | [
[
"Iorio",
"Lorenzo",
""
]
] | The goal of the recently approved space-based LARES mission is to measure the general relativistic Lense-Thirring effect in the gravitational field of the spinning Earth at a repeatedly claimed 1% accuracy by combining its node Omega with those of the existing LAGEOS and LAGEOS II laser-ranged satellites. In this paper... |
0704.3764 | P Ajith | P. Ajith, S. Babak, Y. Chen, M. Hewitson, B. Krishnan, J. T. Whelan,
B. Bruegmann, P. Diener, J. Gonzalez, M. Hannam, S. Husa, M. Koppitz, D.
Pollney, L. Rezzolla, L. Santamaria, A. M. Sintes, U. Sperhake and J.
Thornburg | Phenomenological template family for black-hole coalescence waveforms | Minor changes, Submitted to Class. Quantum Grav. (Proc. GWDAW11) | Class.Quant.Grav.24:S689-S700,2007 | 10.1088/0264-9381/24/19/S31 | AEI-2007-029 | gr-qc astro-ph | null | Recent progress in numerical relativity has enabled us to model the
non-perturbative merger phase of the binary black-hole coalescence problem.
Based on these results, we propose a phenomenological family of waveforms which
can model the inspiral, merger, and ring-down stages of black hole coalescence.
We also constr... | [
{
"created": "Mon, 30 Apr 2007 15:45:13 GMT",
"version": "v1"
},
{
"created": "Tue, 1 May 2007 08:52:02 GMT",
"version": "v2"
},
{
"created": "Wed, 11 Jul 2007 13:21:33 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Ajith",
"P.",
""
],
[
"Babak",
"S.",
""
],
[
"Chen",
"Y.",
""
],
[
"Hewitson",
"M.",
""
],
[
"Krishnan",
"B.",
""
],
[
"Whelan",
"J. T.",
""
],
[
"Bruegmann",
"B.",
""
],
[
"Diener",
"P.",
... | Recent progress in numerical relativity has enabled us to model the non-perturbative merger phase of the binary black-hole coalescence problem. Based on these results, we propose a phenomenological family of waveforms which can model the inspiral, merger, and ring-down stages of black hole coalescence. We also construc... |
gr-qc/9603040 | Yuri N. Obukhov | Yuri N. Obukhov and Sergey I. Tertychniy | Vacuum Einstein Equations in Terms of Curvature Forms | 30 pages, RevTex | Class.Quant.Grav. 13 (1996) 1623-1640 | 10.1088/0264-9381/13/6/025 | null | gr-qc | null | A closed explicit representation of the vacuum Einstein equations in terms of
components of curvature 2-forms is given. The discussion is restricted to the
case of non-vanishing cubic invariant of conformal curvature spinor. The
complete set of algebraic and differential identities connecting particular
equations is ... | [
{
"created": "Sun, 24 Mar 1996 16:44:04 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Obukhov",
"Yuri N.",
""
],
[
"Tertychniy",
"Sergey I.",
""
]
] | A closed explicit representation of the vacuum Einstein equations in terms of components of curvature 2-forms is given. The discussion is restricted to the case of non-vanishing cubic invariant of conformal curvature spinor. The complete set of algebraic and differential identities connecting particular equations is pr... |
1511.09135 | Yongwan Gim | Myungseok Eune, Yongwan Gim, and Wontae Kim | Effective Tolman temperature induced by trace anomaly | 11 pages, 1 figure, version to appear in EPJC | Eur. Phys. J. C77 (2017) 244 | 10.1140/epjc/s10052-017-4812-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Despite the finiteness of stress tensor for a scalar field on the
four-dimensional Schwarzschild black hole in the Israel-Hartle-Hawking vacuum,
the Tolman temperature in thermal equilibrium is certainly divergent on the
horizon due to the infinite blueshift of the Hawking temperature. The origin of
this conflict is ... | [
{
"created": "Mon, 30 Nov 2015 02:14:11 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Dec 2015 05:26:53 GMT",
"version": "v2"
},
{
"created": "Thu, 28 Apr 2016 05:00:44 GMT",
"version": "v3"
},
{
"created": "Fri, 20 Jan 2017 09:21:38 GMT",
"version": "v4"
},
{
"c... | 2017-06-26 | [
[
"Eune",
"Myungseok",
""
],
[
"Gim",
"Yongwan",
""
],
[
"Kim",
"Wontae",
""
]
] | Despite the finiteness of stress tensor for a scalar field on the four-dimensional Schwarzschild black hole in the Israel-Hartle-Hawking vacuum, the Tolman temperature in thermal equilibrium is certainly divergent on the horizon due to the infinite blueshift of the Hawking temperature. The origin of this conflict is du... |
2112.03282 | Tiago V. Fernandes | Tiago V. Fernandes, David Hilditch, Jos\'e P. S. Lemos, Vitor Cardoso | Quasinormal modes of Proca fields in a Schwarzschild-AdS spacetime | 15 pages, 4 tables, 1 appendix with 2 figures | Phys. Rev. D 105, 044017 (2022) | 10.1103/PhysRevD.105.044017 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We present new results concerning the Proca massive vector field in a
Schwarzschild-AdS black hole geometry. We provide a first principles analysis
of Proca vector fields in this geometry using both the vector spherical
harmonic (VSH) separation method and the
Frolov-Krtou\v{s}-Kubiz\v{n}\'{a}k-Santos (FKKS) method t... | [
{
"created": "Mon, 6 Dec 2021 19:00:01 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Feb 2022 17:42:44 GMT",
"version": "v2"
}
] | 2022-02-11 | [
[
"Fernandes",
"Tiago V.",
""
],
[
"Hilditch",
"David",
""
],
[
"Lemos",
"José P. S.",
""
],
[
"Cardoso",
"Vitor",
""
]
] | We present new results concerning the Proca massive vector field in a Schwarzschild-AdS black hole geometry. We provide a first principles analysis of Proca vector fields in this geometry using both the vector spherical harmonic (VSH) separation method and the Frolov-Krtou\v{s}-Kubiz\v{n}\'{a}k-Santos (FKKS) method tha... |
2109.12336 | Javier Relancio | J.J. Relancio, S. Liberati | Black hole surface gravity in doubly special relativity geometries | 11 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a quantum gravity theory, spacetime at mesoscopic scales can acquire a
novel structure very different from the classical concept of general
relativity. A way to effectively characterize the quantum nature of spacetime
is through a momentum dependent space-time metric. There is a vast literature
showing that this g... | [
{
"created": "Sat, 25 Sep 2021 10:53:49 GMT",
"version": "v1"
}
] | 2021-09-28 | [
[
"Relancio",
"J. J.",
""
],
[
"Liberati",
"S.",
""
]
] | In a quantum gravity theory, spacetime at mesoscopic scales can acquire a novel structure very different from the classical concept of general relativity. A way to effectively characterize the quantum nature of spacetime is through a momentum dependent space-time metric. There is a vast literature showing that this geo... |
1001.0031 | Foek Hioe | F.T. Hioe and David Kuebel | Characterizing Planetary Orbits and the Trajectories of Light | 49 pages total with 11 tables and 10 figures | Phys.Rev.D81:084017,2010 | 10.1103/PhysRevD.81.084017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Exact analytic expressions for planetary orbits and light trajectories in the
Schwarzschild geometry are presented. A new parameter space is used to
characterize all possible planetary orbits. Different regions in this parameter
space can be associated with different characteristics of the orbits. The
boundaries for ... | [
{
"created": "Wed, 30 Dec 2009 21:38:20 GMT",
"version": "v1"
}
] | 2010-04-30 | [
[
"Hioe",
"F. T.",
""
],
[
"Kuebel",
"David",
""
]
] | Exact analytic expressions for planetary orbits and light trajectories in the Schwarzschild geometry are presented. A new parameter space is used to characterize all possible planetary orbits. Different regions in this parameter space can be associated with different characteristics of the orbits. The boundaries for th... |
0803.2348 | Achamveedu Gopakumar | Achamveedu Gopakumar and Gerhard Schaefer | Binary Black Hole Coalescence in Semi-Analytic Puncture Evolution | 16 pages, 5 figures | Phys.Rev.D77:104023,2008 | 10.1103/PhysRevD.77.104023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Binary black-hole coalescence is treated semi-analytically by a novel
approach. Our prescription employs the conservative Skeleton Hamiltonian that
describes orbiting Brill-Lindquist wormholes (termed punctures in Numerical
Relativity) within a waveless truncation to the Einstein field equations [G.
Faye, P. Jaranows... | [
{
"created": "Sun, 16 Mar 2008 12:41:18 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Gopakumar",
"Achamveedu",
""
],
[
"Schaefer",
"Gerhard",
""
]
] | Binary black-hole coalescence is treated semi-analytically by a novel approach. Our prescription employs the conservative Skeleton Hamiltonian that describes orbiting Brill-Lindquist wormholes (termed punctures in Numerical Relativity) within a waveless truncation to the Einstein field equations [G. Faye, P. Jaranowski... |
1404.6316 | Yu Seon Jeong | Choong Sun Kim | Extended Uncertainty Relation and Rough Estimate of Cosmological
Constant | 6 pages | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One brief idea on the extended uncertainty relation and the dynamical
quantization of space-time at the Planck scale is presented. The extended
uncertainty relation could be a guiding principle toward the renormalizable
quantum gravity. Cosmological constant in the Universe as a quantum effect is
also roughly estimat... | [
{
"created": "Fri, 25 Apr 2014 04:37:39 GMT",
"version": "v1"
}
] | 2014-04-28 | [
[
"Kim",
"Choong Sun",
""
]
] | One brief idea on the extended uncertainty relation and the dynamical quantization of space-time at the Planck scale is presented. The extended uncertainty relation could be a guiding principle toward the renormalizable quantum gravity. Cosmological constant in the Universe as a quantum effect is also roughly estimated... |
1802.08000 | Luciano Gabbanelli | Luciano Gabbanelli, \'Angel Rinc\'on, Carlos Rubio | Gravitational decoupled anisotropies in compact stars | 21 pages, 5 figures | Eur. Phys. J. C (2018) 78: 370 | 10.1140/epjc/s10052-018-5865-2 | ICCUB-18-003 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Simple generic extensions of isotropic Durgapal--Fuloria stars to the
anisotropic domain are presented. These anisotropic solutions are obtained by
guided minimal deformations over a self gravitating isotropic system. When the
isotropic and the anisotropic sector interacts in a purely gravitational
manner, the condit... | [
{
"created": "Thu, 22 Feb 2018 11:59:08 GMT",
"version": "v1"
}
] | 2018-07-04 | [
[
"Gabbanelli",
"Luciano",
""
],
[
"Rincón",
"Ángel",
""
],
[
"Rubio",
"Carlos",
""
]
] | Simple generic extensions of isotropic Durgapal--Fuloria stars to the anisotropic domain are presented. These anisotropic solutions are obtained by guided minimal deformations over a self gravitating isotropic system. When the isotropic and the anisotropic sector interacts in a purely gravitational manner, the conditio... |
0709.4607 | Z. Ya. Turakulov | A.T. Muminov | Motion of Spin 1/2 Massive Particle in a Curved Spacetime | 9 pages | null | null | null | gr-qc | null | Quasi-classical picture of motion of spin 1/2 massive particle in a curved
spacetime is built on base of simple Lagrangian model. The one is constructed
due to analogy with Lagrangian of massive vector particle. Equations of motion
and spin propagation coincide with Papapetrou equations describing dynamic of
classica... | [
{
"created": "Fri, 28 Sep 2007 12:55:32 GMT",
"version": "v1"
}
] | 2007-10-01 | [
[
"Muminov",
"A. T.",
""
]
] | Quasi-classical picture of motion of spin 1/2 massive particle in a curved spacetime is built on base of simple Lagrangian model. The one is constructed due to analogy with Lagrangian of massive vector particle. Equations of motion and spin propagation coincide with Papapetrou equations describing dynamic of classical ... |
1310.8376 | Cosimo Bambi | Lingyao Kong, Daniele Malafarina, Cosimo Bambi | Can we observationally test the weak cosmic censorship conjecture? | 1+19 pages, 4 figures. v2: minor changes | Eur.Phys.J.C74:2983,2014 | 10.1140/epjc/s10052-014-2983-3 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In general relativity, gravitational collapse of matter fields ends with the
formation of a spacetime singularity, where the matter density becomes infinite
and standard physics breaks down. According to the weak cosmic censorship
conjecture, singularities produced in the gravitational collapse cannot be seen
by dist... | [
{
"created": "Thu, 31 Oct 2013 04:20:48 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Aug 2014 14:00:13 GMT",
"version": "v2"
}
] | 2014-08-05 | [
[
"Kong",
"Lingyao",
""
],
[
"Malafarina",
"Daniele",
""
],
[
"Bambi",
"Cosimo",
""
]
] | In general relativity, gravitational collapse of matter fields ends with the formation of a spacetime singularity, where the matter density becomes infinite and standard physics breaks down. According to the weak cosmic censorship conjecture, singularities produced in the gravitational collapse cannot be seen by distan... |
1010.5740 | Alexander Zhuk | Maxim Eingorn and Alexander Zhuk | Kaluza-Klein models: can we construct a viable example? | 11 pages, Revtex4, no figures, appendix and references added | Phys.Rev.D83:044005,2011 | 10.1103/PhysRevD.83.044005 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Kaluza-Klein models, we investigate soliton solutions of Einstein
equation. We obtain the formulas for perihelion shift, deflection of light,
time delay of radar echoes and PPN parameters. We find that the solitonic
parameter k should be very big: |k|\geq 2.3\times10^4. We define a soliton
solution which correspon... | [
{
"created": "Wed, 27 Oct 2010 16:49:28 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Dec 2010 14:39:34 GMT",
"version": "v2"
}
] | 2011-02-15 | [
[
"Eingorn",
"Maxim",
""
],
[
"Zhuk",
"Alexander",
""
]
] | In Kaluza-Klein models, we investigate soliton solutions of Einstein equation. We obtain the formulas for perihelion shift, deflection of light, time delay of radar echoes and PPN parameters. We find that the solitonic parameter k should be very big: |k|\geq 2.3\times10^4. We define a soliton solution which corresponds... |
2201.12956 | Puskar Mondal | Puskar Mondal, Shing-Tung Yau | Aspects of Quasi-local energy for gravity coupled to gauge fields | 22 pages | null | 10.1103/PhysRevD.105.104068 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We study the aspects of quasi-local energy associated with a $2-$surface
$\Sigma$ bounding a space-like domain $\Omega$ of a physical $3+1$ dimensional
spacetime in the regime of gravity coupled to a gauge field. The Wang-Yau
quasi-local energy together with an additional term arising due to the coupling
of gravity t... | [
{
"created": "Mon, 31 Jan 2022 01:45:26 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Feb 2022 01:12:21 GMT",
"version": "v2"
}
] | 2022-06-15 | [
[
"Mondal",
"Puskar",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | We study the aspects of quasi-local energy associated with a $2-$surface $\Sigma$ bounding a space-like domain $\Omega$ of a physical $3+1$ dimensional spacetime in the regime of gravity coupled to a gauge field. The Wang-Yau quasi-local energy together with an additional term arising due to the coupling of gravity to ... |
gr-qc/9307038 | Robert Manuel Wald | Robert M. Wald | Black Hole Entropy is Noether Charge | 16 pages, EFI 93-42 | Phys.Rev.D48:3427-3431,1993 | 10.1103/PhysRevD.48.R3427 | null | gr-qc | null | We consider a general, classical theory of gravity in $n$ dimensions, arising
from a diffeomorphism invariant Lagrangian. In any such theory, to each vector
field, $\xi^a$, on spacetime one can associate a local symmetry and, hence, a
Noether current $(n-1)$-form, ${\bf j}$, and (for solutions to the field
equations)... | [
{
"created": "Thu, 29 Jul 1993 16:37:13 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Wald",
"Robert M.",
""
]
] | We consider a general, classical theory of gravity in $n$ dimensions, arising from a diffeomorphism invariant Lagrangian. In any such theory, to each vector field, $\xi^a$, on spacetime one can associate a local symmetry and, hence, a Noether current $(n-1)$-form, ${\bf j}$, and (for solutions to the field equations) a... |
1903.05203 | Blake Moore | Blake Moore and Nicol\'as Yunes | A 3PN Fourier Domain Waveform for Non-Spinning Binaries with Moderate
Eccentricity | null | null | 10.1088/1361-6382/ab3778 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While current gravitational wave observations with ground based detectors
have been consistent with compact binaries in quasi-circular orbits, eccentric
binaries may be detectable by ground-based and space-based instruments in the
near future. Eccentricity significantly complicates the gravitational wave
signal, and ... | [
{
"created": "Tue, 12 Mar 2019 20:43:10 GMT",
"version": "v1"
}
] | 2019-09-04 | [
[
"Moore",
"Blake",
""
],
[
"Yunes",
"Nicolás",
""
]
] | While current gravitational wave observations with ground based detectors have been consistent with compact binaries in quasi-circular orbits, eccentric binaries may be detectable by ground-based and space-based instruments in the near future. Eccentricity significantly complicates the gravitational wave signal, and we... |
1408.3334 | Hristu Culetu | Hristu Culetu | On a regular charged black hole with a nonlinear electric source | 11 pages, four figures, footnote updated, Int. J. Theor. Phys.
(2015), 54: 2855 - 2863 | null | 10.1007/s10773-015-2521-6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A modified version of the Reissner-Nordstrom metric is proposed on the
grounds of the nonlinear electrodynamics model. The source of curvature is an
anisotropic fluid with $p_{r} = -\rho$ which resembles the Maxwell stress
tensor at $r >> q^{2}/2m$, where $q$ and $m$ are the mass and charge of the
particle, respectiv... | [
{
"created": "Thu, 14 Aug 2014 16:37:59 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Aug 2014 11:10:26 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Apr 2015 16:42:55 GMT",
"version": "v3"
},
{
"created": "Fri, 30 Oct 2015 13:47:58 GMT",
"version": "v4"
}
] | 2015-11-02 | [
[
"Culetu",
"Hristu",
""
]
] | A modified version of the Reissner-Nordstrom metric is proposed on the grounds of the nonlinear electrodynamics model. The source of curvature is an anisotropic fluid with $p_{r} = -\rho$ which resembles the Maxwell stress tensor at $r >> q^{2}/2m$, where $q$ and $m$ are the mass and charge of the particle, respectivel... |
1511.06516 | Jun-Jin Peng | Jun-Jin Peng | Off-shell Noether current and conserved charge in Horndeski theory | 19 pages, no figures, to appear in PLB | null | 10.1016/j.physletb.2015.11.041 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We derive the off-shell Noether current and potential in the context of
Horndeski theory, which is the most general scalar-tensor theory with a
Lagrangian containing derivatives up to second order while yielding at most to
second-order equations of motion in four dimensions. Then the formulation of
conserved charges ... | [
{
"created": "Fri, 20 Nov 2015 08:16:30 GMT",
"version": "v1"
}
] | 2016-01-20 | [
[
"Peng",
"Jun-Jin",
""
]
] | We derive the off-shell Noether current and potential in the context of Horndeski theory, which is the most general scalar-tensor theory with a Lagrangian containing derivatives up to second order while yielding at most to second-order equations of motion in four dimensions. Then the formulation of conserved charges is... |
1304.7766 | Gerald Marsh | Gerald E. Marsh | Space-Time-Matter | 44 pages; 7 figures. arXiv admin note: text overlap with
arXiv:0912.5099, arXiv:0809.1877. Revised and expanded | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This essay examines our fundamental conceptions of time, spacetime, the
asymmetry of time, and the motion of a quantum mechanical particle. The concept
of time has multiple meanings and these are often confused in the literature
and must be distinguished if any light is to be thrown on this age-old issue.
The asymmet... | [
{
"created": "Sun, 28 Apr 2013 18:14:10 GMT",
"version": "v1"
},
{
"created": "Sat, 4 May 2013 17:50:29 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Aug 2014 16:08:26 GMT",
"version": "v3"
}
] | 2014-08-15 | [
[
"Marsh",
"Gerald E.",
""
]
] | This essay examines our fundamental conceptions of time, spacetime, the asymmetry of time, and the motion of a quantum mechanical particle. The concept of time has multiple meanings and these are often confused in the literature and must be distinguished if any light is to be thrown on this age-old issue. The asymmetry... |
1308.1686 | Helvi Witek | Helvi Witek | Lecture Notes: Numerical Relativity in higher dimensional spacetimes | Lecture notes from the NRHEP spring school held at IST-Lisbon, March
2013. Matches published version in Int.J.Mod.Phys. A28 (2013) 1340017 | Int.J.Mod.Phys. A28 (2013) 1340017 | 10.1142/S0217751X13400174 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes are among the most exciting phenomena predicted by General
Relativity and play a key role in fundamental physics. Many interesting
phenomena involve dynamical black hole configurations in the high curvature
regime of gravity. In these lecture notes I will summarise the main numerical
relativity techniques... | [
{
"created": "Wed, 7 Aug 2013 20:04:49 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Oct 2013 08:51:47 GMT",
"version": "v2"
}
] | 2013-10-11 | [
[
"Witek",
"Helvi",
""
]
] | Black holes are among the most exciting phenomena predicted by General Relativity and play a key role in fundamental physics. Many interesting phenomena involve dynamical black hole configurations in the high curvature regime of gravity. In these lecture notes I will summarise the main numerical relativity techniques t... |
1604.03673 | Dawood Kothawala Dr. | Dawood Kothawala | Accelerated Observers, Thermal Entropy, and Spacetime Curvature | Contribution to the Festschrift in honor of Professor T. Padmanabhan
on the occassion of his 60th birthday | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Assuming that an accelerated observer with four-velocity ${\bf u}_{\rm R}$ in
a curved spacetime attributes the standard Bekenstein-Hawking entropy and Unruh
temperature to his "local Rindler horizon", we show that the $\rm \it change$
in horizon area under parametric displacements of the horizon has a very
specific ... | [
{
"created": "Wed, 13 Apr 2016 06:51:35 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Jun 2016 05:36:11 GMT",
"version": "v2"
}
] | 2016-06-21 | [
[
"Kothawala",
"Dawood",
""
]
] | Assuming that an accelerated observer with four-velocity ${\bf u}_{\rm R}$ in a curved spacetime attributes the standard Bekenstein-Hawking entropy and Unruh temperature to his "local Rindler horizon", we show that the $\rm \it change$ in horizon area under parametric displacements of the horizon has a very specific th... |
1101.4490 | Hemwati Nandan | Nils M. Bezares-Roder, Hemwati Nandan, Umananda Dev Goswami | Primeval acceleration and bounce conditions within induced gravity | 23 pages, 3 figures, Dedicated to 75th birth anniversary of Heinz
Dehnen | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A model of induced gravity with Higgs potential is analysed for the FLRW
cosmology. Conditions of acceleration and signatures for the primeval universe
along with the inflation are discussed. It is shown that the scalar-field
excitations act quintessentially within effective pressure terms for a negative
deceleration... | [
{
"created": "Mon, 24 Jan 2011 10:38:25 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Bezares-Roder",
"Nils M.",
""
],
[
"Nandan",
"Hemwati",
""
],
[
"Goswami",
"Umananda Dev",
""
]
] | A model of induced gravity with Higgs potential is analysed for the FLRW cosmology. Conditions of acceleration and signatures for the primeval universe along with the inflation are discussed. It is shown that the scalar-field excitations act quintessentially within effective pressure terms for a negative deceleration p... |
gr-qc/0606103 | Mohammad Reza Setare | M. R. Setare and S. Shafei | The Holographic Model of Dark Energy and Thermodynamics of Non-Flat
Accelerated Expanding Universe | 12 pages, no figure, abstract and text extended, references added,
accepted for publication in JCAP | JCAP 0609 (2006) 011 | 10.1088/1475-7516/2006/09/011 | null | gr-qc | null | Motivated by recent results on non-vanishing spatial curvature \cite{curve}
we employ the holographic model of dark energy to investigate the validity of
first and second laws of thermodynamics in non-flat (closed) universe enclosed
by apparent horizon $R_A$ and the event horizon measured from the sphere of
horizon n... | [
{
"created": "Fri, 23 Jun 2006 14:03:12 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Aug 2006 11:15:58 GMT",
"version": "v2"
},
{
"created": "Sat, 14 Oct 2006 12:04:26 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Setare",
"M. R.",
""
],
[
"Shafei",
"S.",
""
]
] | Motivated by recent results on non-vanishing spatial curvature \cite{curve} we employ the holographic model of dark energy to investigate the validity of first and second laws of thermodynamics in non-flat (closed) universe enclosed by apparent horizon $R_A$ and the event horizon measured from the sphere of horizon nam... |
0711.0714 | Arundhati Dasgupta | Arundhati Dasgupta | Semiclassical Horizons | 9pgs, Talk at Theory Canada III, to appear in CJP | null | 10.1139/P07-189 | null | gr-qc | null | The entropy of apparent horizons is derived using coherent states or
semiclassical states in quantum gravity. The leading term is proportional to
area for large horizons, and the correction terms differ according to the
details of the graph which is used to regularise the quantum gravity phase
space variables.
| [
{
"created": "Mon, 5 Nov 2007 18:28:30 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Dasgupta",
"Arundhati",
""
]
] | The entropy of apparent horizons is derived using coherent states or semiclassical states in quantum gravity. The leading term is proportional to area for large horizons, and the correction terms differ according to the details of the graph which is used to regularise the quantum gravity phase space variables. |
1810.01460 | Bobur Turimov | Bobur Turimov, Bobomurat Ahmedov, Martin Kolo\v{s}, Zden\v{e}k
Stuchl\'ik | Axially symmetric and static solutions of Einstein equations with
self-gravitating scalar field | 16 pages, 9 figures | published in Phys. Rev. D, (2018) | 10.1103/PhysRevD.98.084039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The exact axisymmetric and static solution of the Einstein equations coupled
to axisymmetric and static gravitating scalar (or phantom) field is presented.
The spacetimes modified by the scalar field are explicitly given for the so
called $\gamma$-metric and Erez-Rosen metric with quadrupole moment $q$,
influence of ... | [
{
"created": "Tue, 2 Oct 2018 19:15:57 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Nov 2018 07:01:19 GMT",
"version": "v2"
}
] | 2018-11-09 | [
[
"Turimov",
"Bobur",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Kološ",
"Martin",
""
],
[
"Stuchlík",
"Zdeněk",
""
]
] | The exact axisymmetric and static solution of the Einstein equations coupled to axisymmetric and static gravitating scalar (or phantom) field is presented. The spacetimes modified by the scalar field are explicitly given for the so called $\gamma$-metric and Erez-Rosen metric with quadrupole moment $q$, influence of th... |
gr-qc/0404126 | Nathalie Deruelle | Nathalie Deruelle | Bouncing universes and their perturbations: remarks on a toy model | null | null | null | null | gr-qc astro-ph hep-th | null | Friedmann-Lemaitre universes driven by a scalar field, spatially closed and
bouncing, were recently studied by Martin and Peter in [1], with the conclusion
that the spectrum of their large scale matter perturbations was generically
modified when going through the bounce. In this Note we give the properties of
the sca... | [
{
"created": "Fri, 30 Apr 2004 10:06:28 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Jun 2004 15:22:33 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Deruelle",
"Nathalie",
""
]
] | Friedmann-Lemaitre universes driven by a scalar field, spatially closed and bouncing, were recently studied by Martin and Peter in [1], with the conclusion that the spectrum of their large scale matter perturbations was generically modified when going through the bounce. In this Note we give the properties of the scala... |
1606.06531 | Liu Zhao | Yuan Sun, Hao Xu and Liu Zhao | Thermodynamics and holographic entanglement entropy for spherical black
holes in 5D Gauss-Bonnet gravity | 17 pages, 4 PDF figures. Update: journal version | JHEP 09 (2016) 060 | 10.1007/JHEP09(2016)060 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The holographic entanglement entropy is studied numerically in
(4+1)-dimensional spherically symmetric Gauss-Bonnet AdS black hole spacetime
with compact boundary. On the bulk side the black hole spacetime undergoes a
van der Waals-like phase transition in the extended phase space, which is
reviewed with emphasis on ... | [
{
"created": "Tue, 21 Jun 2016 12:17:43 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Sep 2016 04:53:23 GMT",
"version": "v2"
}
] | 2016-10-12 | [
[
"Sun",
"Yuan",
""
],
[
"Xu",
"Hao",
""
],
[
"Zhao",
"Liu",
""
]
] | The holographic entanglement entropy is studied numerically in (4+1)-dimensional spherically symmetric Gauss-Bonnet AdS black hole spacetime with compact boundary. On the bulk side the black hole spacetime undergoes a van der Waals-like phase transition in the extended phase space, which is reviewed with emphasis on th... |
1103.4078 | Geoffrey Comp\`ere | Geoffrey Comp\`ere, Fran\c{c}ois Dehouck and Amitabh Virmani | On Asymptotic Flatness and Lorentz Charges | 26 pages; no figures; v2: minor changes; v3: clarifications +
references + a new lemma added, results unaffected | null | 10.1088/0264-9381/28/14/145007 | ULB-TH/11-08 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we establish two results concerning four-dimensional
asymptotically flat spacetimes at spatial infinity. First, we show that the six
conserved Lorentz charges are encoded in two unique, distinct, but mutually
dual symmetric divergence free tensors that we construct from the equations of
motion. Second, ... | [
{
"created": "Mon, 21 Mar 2011 17:01:31 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Mar 2011 18:23:38 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Apr 2011 13:23:16 GMT",
"version": "v3"
}
] | 2015-05-27 | [
[
"Compère",
"Geoffrey",
""
],
[
"Dehouck",
"François",
""
],
[
"Virmani",
"Amitabh",
""
]
] | In this paper we establish two results concerning four-dimensional asymptotically flat spacetimes at spatial infinity. First, we show that the six conserved Lorentz charges are encoded in two unique, distinct, but mutually dual symmetric divergence free tensors that we construct from the equations of motion. Second, we... |
1102.5759 | Razvan-Gheorghe Gurau | Razvan Gurau | The complete 1/N expansion of colored tensor models in arbitrary
dimension | null | null | 10.1007/s00023-011-0118-z | pi-qg-214 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we generalize the results of [1,2] and derive the full 1/N
expansion of colored tensor models in arbitrary dimensions. We detail the
expansion for the independent identically distributed model and the topological
Boulatov Ooguri model.
| [
{
"created": "Mon, 28 Feb 2011 20:09:46 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Gurau",
"Razvan",
""
]
] | In this paper we generalize the results of [1,2] and derive the full 1/N expansion of colored tensor models in arbitrary dimensions. We detail the expansion for the independent identically distributed model and the topological Boulatov Ooguri model. |
1604.03604 | Alexander Zhidenko | M. A. Cuyubamba, R. A. Konoplya, A. Zhidenko | Quasinormal modes and a new instability of Einstein-Gauss-Bonnet black
holes in the de Sitter world | 9 pages, 8 figures | Phys. Rev. D 93, 104053 (2016) | 10.1103/PhysRevD.93.104053 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Analysis of time-domain profiles for gravitational perturbations shows that
Gauss-Bonnet black holes in a de Sitter world possess a new kind of dynamical
instability which does not take place for asymptotically flat
Einstein-Gauss-Bonnet black holes. The new instability is in the gravitational
perturbations of the sc... | [
{
"created": "Tue, 12 Apr 2016 22:11:38 GMT",
"version": "v1"
},
{
"created": "Fri, 20 May 2016 16:24:41 GMT",
"version": "v2"
}
] | 2016-05-30 | [
[
"Cuyubamba",
"M. A.",
""
],
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | Analysis of time-domain profiles for gravitational perturbations shows that Gauss-Bonnet black holes in a de Sitter world possess a new kind of dynamical instability which does not take place for asymptotically flat Einstein-Gauss-Bonnet black holes. The new instability is in the gravitational perturbations of the scal... |
2311.12645 | Yu-Min Hu | Yu-Min Hu, Yang Yu, Yi-Fu Cai, Xian Gao | The effective field theory approach to the strong coupling issue in
$f(T)$ gravity with a non-minimally coupled scalar field | null | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hamiltonian analysis for $f(T)$ gravity implies the existence of at least
one scalar-type degree of freedom (DoF). However, this scalar DoF of $f(T)$
gravity does not manifest in linear perturbations around a cosmological
background, which indicates an underlying strong coupling problem. In this work
we expand th... | [
{
"created": "Tue, 21 Nov 2023 14:45:39 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Jan 2024 11:42:01 GMT",
"version": "v2"
}
] | 2024-02-01 | [
[
"Hu",
"Yu-Min",
""
],
[
"Yu",
"Yang",
""
],
[
"Cai",
"Yi-Fu",
""
],
[
"Gao",
"Xian",
""
]
] | The Hamiltonian analysis for $f(T)$ gravity implies the existence of at least one scalar-type degree of freedom (DoF). However, this scalar DoF of $f(T)$ gravity does not manifest in linear perturbations around a cosmological background, which indicates an underlying strong coupling problem. In this work we expand the ... |
1703.08454 | Astrid Eichhorn | Astrid Eichhorn, Sebastian Mizera and Sumati Surya | Echoes of Asymptotic Silence in Causal Set Quantum Gravity | 12 pages, 7 figures | null | 10.1088/1361-6382/aa7d1b | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the idea of asymptotic silence in causal set theory and find that
causal sets approximated by continuum spacetimes exhibit behaviour akin to
asymptotic silence. We make use of an intrinsic definition of spatial distance
between causal set elements in the discrete analogue of a spatial hypersurface.
Using n... | [
{
"created": "Fri, 24 Mar 2017 15:12:31 GMT",
"version": "v1"
}
] | 2017-08-02 | [
[
"Eichhorn",
"Astrid",
""
],
[
"Mizera",
"Sebastian",
""
],
[
"Surya",
"Sumati",
""
]
] | We explore the idea of asymptotic silence in causal set theory and find that causal sets approximated by continuum spacetimes exhibit behaviour akin to asymptotic silence. We make use of an intrinsic definition of spatial distance between causal set elements in the discrete analogue of a spatial hypersurface. Using num... |
gr-qc/0505071 | Bernd Schroers | C Meusburger, B J Schroers | Boundary conditions and symplectic structure in the Chern-Simons
formulation of (2+1)-dimensional gravity | 44 pages, 3 eps figures | Class.Quant.Grav. 22 (2005) 3689-3724 | 10.1088/0264-9381/22/17/021 | EMPG-05-08 | gr-qc | null | We propose a description of open universes in the Chern-Simons formulation of
(2+1)-dimensional gravity where spatial infinity is implemented as a puncture.
At this puncture, additional variables are introduced which lie in the
cotangent bundle of the Poincar\'e group, and coupled minimally to the
Chern-Simons gauge ... | [
{
"created": "Mon, 16 May 2005 20:05:13 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Meusburger",
"C",
""
],
[
"Schroers",
"B J",
""
]
] | We propose a description of open universes in the Chern-Simons formulation of (2+1)-dimensional gravity where spatial infinity is implemented as a puncture. At this puncture, additional variables are introduced which lie in the cotangent bundle of the Poincar\'e group, and coupled minimally to the Chern-Simons gauge fi... |
2002.09448 | Elizabeth Winstanley | Visakan Balakumar and Elizabeth Winstanley | Hadamard parametrix of the Feynman Green's function of a
five-dimensional charged scalar field | 27 pages, very minor changes, accepted for publication in the
Proceedings of the V Amazonian Symposium on Physics, 18-22 November 2019,
Belem, Brazil | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hadamard parametrix is a representation of the short-distance singularity
structure of the Feynman Green's function for a quantum field on a curved
space-time background. Subtracting these divergent terms regularizes the
Feynman Green's function and enables the computation of renormalized
expectation values of ob... | [
{
"created": "Fri, 21 Feb 2020 18:04:40 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jul 2020 18:00:31 GMT",
"version": "v2"
}
] | 2020-07-08 | [
[
"Balakumar",
"Visakan",
""
],
[
"Winstanley",
"Elizabeth",
""
]
] | The Hadamard parametrix is a representation of the short-distance singularity structure of the Feynman Green's function for a quantum field on a curved space-time background. Subtracting these divergent terms regularizes the Feynman Green's function and enables the computation of renormalized expectation values of obse... |
1707.05192 | C. J. Pethick | Gordon Baym, Subodh P. Patil, and C. J. Pethick | Damping of gravitational waves by matter | 9 pages (10 pages in journal), published version | Physical Review D 96, 084033 (2017) | 10.1103/PhysRevD.96.084033 | NORDITA 2017-069 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a unified description, via the Boltzmann equation, of damping of
gravitational waves by matter, incorporating collisions. We identify two
physically distinct damping mechanisms -- collisional and Landau damping. We
first consider damping in flat spacetime, and then generalize the results to
allow for cosmo... | [
{
"created": "Fri, 14 Jul 2017 14:44:00 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Oct 2017 12:50:28 GMT",
"version": "v2"
}
] | 2017-10-25 | [
[
"Baym",
"Gordon",
""
],
[
"Patil",
"Subodh P.",
""
],
[
"Pethick",
"C. J.",
""
]
] | We develop a unified description, via the Boltzmann equation, of damping of gravitational waves by matter, incorporating collisions. We identify two physically distinct damping mechanisms -- collisional and Landau damping. We first consider damping in flat spacetime, and then generalize the results to allow for cosmolo... |
1401.0866 | Francisco Frutos-Alfaro Dr. rer. nat. | Francisco Frutos-Alfaro | Perturbation of the Kerr Metric | null | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new Kerr-like metric with quadrupole moment is obtained by means of
perturbing the Kerr spacetime. By comparison with the exterior Hartle-Thorne
metric, it is showed that it could be matched to an interior solution. This
metric may represent the spacetime of an astrophysical object.
| [
{
"created": "Sun, 5 Jan 2014 04:11:24 GMT",
"version": "v1"
}
] | 2014-01-09 | [
[
"Frutos-Alfaro",
"Francisco",
""
]
] | A new Kerr-like metric with quadrupole moment is obtained by means of perturbing the Kerr spacetime. By comparison with the exterior Hartle-Thorne metric, it is showed that it could be matched to an interior solution. This metric may represent the spacetime of an astrophysical object. |
1312.1466 | Sarfraz Ali | M. Jamil Amir, Sarfraz Ali | Ricci Dark Energy of Amended FRW Universe in Chern-Simon Modified
Gravity | 11 pages,2 graphs. arXiv admin note: text overlap with
arXiv:0909.1267 by other authors without attribution | Int. J. Theor. Phys. (2015) | 10.1007/s10773-014-2334-z | 54:1362--1369 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The energy density of the universe is proportional to the Ricci scalar
curvature in the dynamical Chern-Simon (CS) modified gravity. In this paper, we
consider the Amended Friedman-Robertson-Walker (AFRW) universe and explore its
scale factor and the Ricci Dark Energy. THese turned out to be well-defined and
definite... | [
{
"created": "Thu, 5 Dec 2013 08:24:16 GMT",
"version": "v1"
}
] | 2015-09-21 | [
[
"Amir",
"M. Jamil",
""
],
[
"Ali",
"Sarfraz",
""
]
] | The energy density of the universe is proportional to the Ricci scalar curvature in the dynamical Chern-Simon (CS) modified gravity. In this paper, we consider the Amended Friedman-Robertson-Walker (AFRW) universe and explore its scale factor and the Ricci Dark Energy. THese turned out to be well-defined and definite. ... |
1108.5767 | Jan Hlad\'ik | Zdenek Stuchlik, Jan Hladik, Martin Urbanec | Neutrino trapping in braneworld extremely compact stars | null | null | 10.1007/s10714-011-1229-z | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extremely Compact Stars (ECS) contain trapped null geodesics. When such
objects enter the evolution period admitting geodetical motion of neutrinos,
certain part of neutrinos produced in their interior will be trapped
influencing their neutrino luminosity and thermal evolution. We study neutrino
trapping in the brane... | [
{
"created": "Mon, 29 Aug 2011 21:50:16 GMT",
"version": "v1"
}
] | 2011-08-31 | [
[
"Stuchlik",
"Zdenek",
""
],
[
"Hladik",
"Jan",
""
],
[
"Urbanec",
"Martin",
""
]
] | Extremely Compact Stars (ECS) contain trapped null geodesics. When such objects enter the evolution period admitting geodetical motion of neutrinos, certain part of neutrinos produced in their interior will be trapped influencing their neutrino luminosity and thermal evolution. We study neutrino trapping in the branewo... |
2406.05177 | Fabian Gittins | Fabian Gittins, Nils Andersson | Neutron-star seismology with realistic, finite-temperature nuclear
matter | 14 pages, 6 figures, 1 table | null | null | null | gr-qc astro-ph.HE nucl-th | http://creativecommons.org/licenses/by/4.0/ | The oscillation spectrum of a neutron star is notably rich and intrinsically
dependent on the equation of state of nuclear matter. With recent advancements
in gravitational-wave and electromagnetic astronomy, we are nearing the
capability to perform neutron-star asteroseismology and probe the complex
physics of neutr... | [
{
"created": "Fri, 7 Jun 2024 18:00:00 GMT",
"version": "v1"
}
] | 2024-06-11 | [
[
"Gittins",
"Fabian",
""
],
[
"Andersson",
"Nils",
""
]
] | The oscillation spectrum of a neutron star is notably rich and intrinsically dependent on the equation of state of nuclear matter. With recent advancements in gravitational-wave and electromagnetic astronomy, we are nearing the capability to perform neutron-star asteroseismology and probe the complex physics of neutron... |
1910.06791 | Joan Josep Ferrando | Joan Josep Ferrando and Juan Antonio S\'aez | Relativistic kinematic approach to the classical ideal gas | 22 pages, no figures | Class. Quantum Grav. 36 (2019) 215008 | 10.1088/1361-6382/ab4229 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | he necessary and sufficient conditions for a unit time-like vector field to
be the unit velocity of a classical ideal gas are obtained. In a recent paper
[Coll, Ferrando and S\'aez, Phys. Rev D {\bf 99} (2019)] we have offered a
purely hydrodynamic description of a classical ideal gas. Here we take one more
step in r... | [
{
"created": "Tue, 15 Oct 2019 14:17:00 GMT",
"version": "v1"
}
] | 2019-10-16 | [
[
"Ferrando",
"Joan Josep",
""
],
[
"Sáez",
"Juan Antonio",
""
]
] | he necessary and sufficient conditions for a unit time-like vector field to be the unit velocity of a classical ideal gas are obtained. In a recent paper [Coll, Ferrando and S\'aez, Phys. Rev D {\bf 99} (2019)] we have offered a purely hydrodynamic description of a classical ideal gas. Here we take one more step in red... |
2405.11101 | Tyler Grover | Owen Fiedorowicz, Tyler C. Grover, Vincent G. J. Rodgers, Hazal D.
Zenger | Diffeomorphism Radiative Degrees of Freedom of Thomas-Whitehead Gravity | 16 pages, 18 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The geometric action of the semi-direct product of the Kac-Moody and Virasoro
algebras contains the WZW action equipped with a background vector potential
$A$ associated to a coadjoint element of the Kac-Moody algebra as well as the
2D gravitational Polyakov action and an accompanying background field,
$\mathcal{D}$,... | [
{
"created": "Fri, 17 May 2024 21:38:51 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Jul 2024 18:29:05 GMT",
"version": "v2"
}
] | 2024-07-23 | [
[
"Fiedorowicz",
"Owen",
""
],
[
"Grover",
"Tyler C.",
""
],
[
"Rodgers",
"Vincent G. J.",
""
],
[
"Zenger",
"Hazal D.",
""
]
] | The geometric action of the semi-direct product of the Kac-Moody and Virasoro algebras contains the WZW action equipped with a background vector potential $A$ associated to a coadjoint element of the Kac-Moody algebra as well as the 2D gravitational Polyakov action and an accompanying background field, $\mathcal{D}$, c... |
2407.14196 | Michele Lenzi | Jos\'e Luis Jaramillo, Michele Lenzi, Carlos F. Sopuerta | Integrability in Perturbed Black Holes: Background Hidden Structures | 23 pages, comments are welcome | null | null | null | gr-qc hep-th nlin.SI | http://creativecommons.org/licenses/by/4.0/ | In this work we investigate the presence of integrable hidden structures in
the dynamics of perturbed non-rotating black holes (BHs). This can also be
considered as a first step in a wider program of an effective identification of
``slow'' and ``fast'' degrees of freedom (DoFs) in the (binary) BH dynamics,
following ... | [
{
"created": "Fri, 19 Jul 2024 10:48:22 GMT",
"version": "v1"
}
] | 2024-07-22 | [
[
"Jaramillo",
"José Luis",
""
],
[
"Lenzi",
"Michele",
""
],
[
"Sopuerta",
"Carlos F.",
""
]
] | In this work we investigate the presence of integrable hidden structures in the dynamics of perturbed non-rotating black holes (BHs). This can also be considered as a first step in a wider program of an effective identification of ``slow'' and ``fast'' degrees of freedom (DoFs) in the (binary) BH dynamics, following a ... |
2305.02709 | Sachin Hatkar | S.P.Hatkar, S.P.Saraogi, S.D.Katore | Gravitational Wave from Domain Walls in $f(G)$ Theory | paper is communicated to journal | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have studied Bianchi type I space-time in the presence of
domain walls in the context of $f(G)$ theory of gravitation. Field equations
are solved by using the special form of deceleration parameter. It is also
assumed that expansion is proportional to the shear scalar of the model. Some
physical par... | [
{
"created": "Thu, 4 May 2023 10:32:02 GMT",
"version": "v1"
}
] | 2023-05-05 | [
[
"Hatkar",
"S. P.",
""
],
[
"Saraogi",
"S. P.",
""
],
[
"Katore",
"S. D.",
""
]
] | In this paper, we have studied Bianchi type I space-time in the presence of domain walls in the context of $f(G)$ theory of gravitation. Field equations are solved by using the special form of deceleration parameter. It is also assumed that expansion is proportional to the shear scalar of the model. Some physical param... |
gr-qc/9212013 | Malcolm MacCallum | M.A.H. MacCallum | Inhomogeneous and anisotropic cosmologies | 30pp | NATO Adv.Study Inst.Ser.C.Math.Phys.Sci.393:131-159,1993 | null | null | gr-qc | null | This is a review of cosmological models prepared for the Pont d'Oye workshop
on the origin of structure in the universe. The classes of models are discussed
in turn, and then some of their uses are considered.
| [
{
"created": "Mon, 21 Dec 1992 15:49:52 GMT",
"version": "v1"
}
] | 2011-03-28 | [
[
"MacCallum",
"M. A. H.",
""
]
] | This is a review of cosmological models prepared for the Pont d'Oye workshop on the origin of structure in the universe. The classes of models are discussed in turn, and then some of their uses are considered. |
2111.09068 | Leonardo Fernandez-Jambrina | L. Fern\'andez-Jambrina and R. Lazkoz | New futures for cosmological models | 2 tables, 11 pages, accepted for publication in Philosophical
Transactions of the Royal Society A | Phil. Trans. R. Soc. A 380: 20210333 (2022) | 10.1098/rsta.2021.0333 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The discovery of accelerated expansion of the universe opened the possibility
of new scenarios for the doom of our spacetime, besides aeternal expansion and
a final contraction. In this paper we review the chances which may await our
universe. In particular, there are new possible singular fates (sudden
singularities... | [
{
"created": "Wed, 17 Nov 2021 12:26:01 GMT",
"version": "v1"
}
] | 2022-03-01 | [
[
"Fernández-Jambrina",
"L.",
""
],
[
"Lazkoz",
"R.",
""
]
] | The discovery of accelerated expansion of the universe opened the possibility of new scenarios for the doom of our spacetime, besides aeternal expansion and a final contraction. In this paper we review the chances which may await our universe. In particular, there are new possible singular fates (sudden singularities, ... |
2101.06372 | Hamidreza Saiedi | Hamidreza Saiedi | Thermodynamic Behavior of Time-Dependent Wormholes in Palatini $f(R)$
Gravity | null | Gen Relativ Gravit 53, 4 (2021) | 10.1007/s10714-020-02773-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the frame work of Palatini approach to modified $f(R)$ theories of
gravity, we attempt to investigate the thermodynamic behavior of time-dependent
wormhole geometries. By considering an evolving wormhole spacetime, we find the
field equations in Palatini $f(R)$ gravity. The energy density and pressure are
redefine... | [
{
"created": "Sat, 16 Jan 2021 04:52:27 GMT",
"version": "v1"
}
] | 2021-01-19 | [
[
"Saiedi",
"Hamidreza",
""
]
] | In the frame work of Palatini approach to modified $f(R)$ theories of gravity, we attempt to investigate the thermodynamic behavior of time-dependent wormhole geometries. By considering an evolving wormhole spacetime, we find the field equations in Palatini $f(R)$ gravity. The energy density and pressure are redefined ... |
1906.00603 | Aurelien Barrau | Aur\'elien Barrau, Killian Martineau, Jeremy Martinon, Flora Moulin | Quasinormal modes of black holes in a toy-model for cumulative quantum
gravity | null | null | 10.1016/j.physletb.2019.06.033 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The idea that quantum gravity effects might leak outside the horizon of a
black hole has recently been intensively considered. In this study, we
calculate the quasinormal modes as a function of the location and amplitude of
a generic metric perturbation distorting to the Schwarzschild spacetime. We
conclude on the po... | [
{
"created": "Mon, 3 Jun 2019 07:08:54 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jun 2019 09:30:06 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Aug 2022 17:11:10 GMT",
"version": "v3"
}
] | 2022-08-16 | [
[
"Barrau",
"Aurélien",
""
],
[
"Martineau",
"Killian",
""
],
[
"Martinon",
"Jeremy",
""
],
[
"Moulin",
"Flora",
""
]
] | The idea that quantum gravity effects might leak outside the horizon of a black hole has recently been intensively considered. In this study, we calculate the quasinormal modes as a function of the location and amplitude of a generic metric perturbation distorting to the Schwarzschild spacetime. We conclude on the poss... |
2107.13550 | Gamal G.L. Nashed | G.G.L. Nashed and Shin'ichi Nojiri | Mimetic Euler-Heisenberg theory, charged solutions and multi-horizon
black holes | 19 pages, 9 figures, accepted for publication in Phys. Rev. D | Phys. Rev. D 104, 044043, (2021) | 10.1103/PhysRevD.104.044043 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We construct several new classes of black hole (BH) solutions in the context
of the mimetic Euler-Heisenberg theory. We separately derive three differently
charged BH solutions and their relevant mimetic forms. We show that the
asymptotic form of all BH solutions behaves like a flat spacetime. These BHs,
either with/... | [
{
"created": "Wed, 28 Jul 2021 12:13:05 GMT",
"version": "v1"
}
] | 2021-08-18 | [
[
"Nashed",
"G. G. L.",
""
],
[
"Nojiri",
"Shin'ichi",
""
]
] | We construct several new classes of black hole (BH) solutions in the context of the mimetic Euler-Heisenberg theory. We separately derive three differently charged BH solutions and their relevant mimetic forms. We show that the asymptotic form of all BH solutions behaves like a flat spacetime. These BHs, either with/wi... |
gr-qc/9706001 | Stephen A. Ramsey | S. A. Ramsey and B. L. Hu | O(N) Quantum fields in curved spacetime | 31 pages, 2 figures, uses RevTeX 3.1, LaTeX 2e, AMSfonts 2.2,
graphics 0.6; To appear in Phys. Rev. D (7/15/97) | Phys.Rev. D56 (1997) 661-677 | 10.1103/PhysRevD.56.661 | UMDPP#97-083 | gr-qc hep-ph | null | For the O(N) field theory with lambda Phi^4 self-coupling, we construct the
two-particle-irreducible (2PI), closed-time-path (CTP) effective action in a
general curved spacetime. From this we derive a set of coupled equations for
the mean field and the variance. They are useful for studying the
nonperturbative, noneq... | [
{
"created": "Mon, 2 Jun 1997 18:26:37 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Ramsey",
"S. A.",
""
],
[
"Hu",
"B. L.",
""
]
] | For the O(N) field theory with lambda Phi^4 self-coupling, we construct the two-particle-irreducible (2PI), closed-time-path (CTP) effective action in a general curved spacetime. From this we derive a set of coupled equations for the mean field and the variance. They are useful for studying the nonperturbative, nonequi... |
gr-qc/9607061 | Alicia Sintes | J. Carot and A.M. Sintes | Homothetic perfect fluid space-times | 27 pages, Latex file, Submitted to Class. Quantum Grav | Class.Quant.Grav. 14 (1997) 1183-1205 | 10.1088/0264-9381/14/5/021 | null | gr-qc | null | A brief summary of results on homotheties in General Relativity is given,
including general information about space-times admitting an r-parameter group
of homothetic transformations for r>2, as well as some specific results on
perfect fluids. Attention is then focussed on inhomogeneous models, in
particular on those... | [
{
"created": "Wed, 24 Jul 1996 14:12:01 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Carot",
"J.",
""
],
[
"Sintes",
"A. M.",
""
]
] | A brief summary of results on homotheties in General Relativity is given, including general information about space-times admitting an r-parameter group of homothetic transformations for r>2, as well as some specific results on perfect fluids. Attention is then focussed on inhomogeneous models, in particular on those w... |
1111.6908 | Niels Warburton | Niels Warburton, Sarp Akcay, Leor Barack, Jonathan R. Gair, Norichika
Sago | Evolution of inspiral orbits around a Schwarzschild black hole | 4 pages, 3 figures, Fast GSF calculator code available at:
http://www.nielswarburton.net/lib_Sch_GSF/ | Phys. Rev. D 85, 061501(R) (2012) | 10.1103/PhysRevD.85.061501 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present results from calculations of the orbital evolution in eccentric
binaries of nonrotating black holes with extreme mass-ratios. Our inspiral
model is based on the method of osculating geodesics, and is the first to
incorporate the full gravitational self-force (GSF) effect, including
conservative corrections... | [
{
"created": "Tue, 29 Nov 2011 17:19:11 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Mar 2012 21:06:43 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Dec 2013 12:36:51 GMT",
"version": "v3"
}
] | 2013-12-11 | [
[
"Warburton",
"Niels",
""
],
[
"Akcay",
"Sarp",
""
],
[
"Barack",
"Leor",
""
],
[
"Gair",
"Jonathan R.",
""
],
[
"Sago",
"Norichika",
""
]
] | We present results from calculations of the orbital evolution in eccentric binaries of nonrotating black holes with extreme mass-ratios. Our inspiral model is based on the method of osculating geodesics, and is the first to incorporate the full gravitational self-force (GSF) effect, including conservative corrections. ... |
2207.14217 | Arick Shao | Gustav Holzegel, Arick Shao | The bulk-boundary correspondence for the Einstein equations in
asymptotically Anti-de Sitter spacetimes | 60 pages, 1 figure. Version accepted at ARMA | null | 10.1007/s00205-023-01890-9 | null | gr-qc hep-th math.AP | http://creativecommons.org/licenses/by/4.0/ | In this paper, we consider vacuum asymptotically anti-de Sitter spacetimes $(
\mathscr{M}, g )$ with conformal boundary $( \mathscr{I}, \mathfrak{g} )$. We
establish a correspondence, near $\mathscr{I}$, between such spacetimes and
their conformal boundary data on $\mathscr{I}$. More specifically, given a
domain $\ma... | [
{
"created": "Thu, 28 Jul 2022 16:34:59 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Apr 2023 14:34:18 GMT",
"version": "v2"
}
] | 2023-06-14 | [
[
"Holzegel",
"Gustav",
""
],
[
"Shao",
"Arick",
""
]
] | In this paper, we consider vacuum asymptotically anti-de Sitter spacetimes $( \mathscr{M}, g )$ with conformal boundary $( \mathscr{I}, \mathfrak{g} )$. We establish a correspondence, near $\mathscr{I}$, between such spacetimes and their conformal boundary data on $\mathscr{I}$. More specifically, given a domain $\math... |
2407.00366 | Niels Warburton | Niels Warburton, Barry Wardell, David Trestini, Quentin Henry, Adam
Pound, Luc Blanchet, Leanne Durkan, Guillaume Faye, Jeremy Miller | Comparison of 4.5PN and 2SF gravitational energy fluxes from
quasicircular compact binaries | 15 pages, 4 figures, modes of PN flux provided in ancillary file | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The past three years have seen two significant advances in models of
gravitational waveforms emitted by quasicircular compact binaries in two
regimes: the weak-field, post-Newtonian regime, in which the gravitational wave
energy flux has now been calculated to fourth-and-a-half post-Newtonian order
(4.5PN) [Phys. Rev... | [
{
"created": "Sat, 29 Jun 2024 08:31:38 GMT",
"version": "v1"
}
] | 2024-07-02 | [
[
"Warburton",
"Niels",
""
],
[
"Wardell",
"Barry",
""
],
[
"Trestini",
"David",
""
],
[
"Henry",
"Quentin",
""
],
[
"Pound",
"Adam",
""
],
[
"Blanchet",
"Luc",
""
],
[
"Durkan",
"Leanne",
""
],
[
"Fa... | The past three years have seen two significant advances in models of gravitational waveforms emitted by quasicircular compact binaries in two regimes: the weak-field, post-Newtonian regime, in which the gravitational wave energy flux has now been calculated to fourth-and-a-half post-Newtonian order (4.5PN) [Phys. Rev. ... |
2301.13610 | Pardyumn Kumar Sahoo | Z. Yousaf, M. Z. Bhatti, H. Aman, P.K. Sahoo | Non-Singular Bouncing Model in Energy Momentum Squared Gravity | Physica Scripta accepted version | Physica Scripta, 98 (2023) 035002 | 10.1088/1402-4896/acb6c3 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This work is concerned to study the bouncing nature of the universe for an
isotropic configuration of fluid $\mathcal{T}_{\alpha\beta}$ and
Friedmann-Lema\^{i}tre-Robertson-Walker metric scheme. This work is carried out
under the novel $f(\mathcal{G},\mathcal{T}_{\alpha \beta} \mathcal{T}^{\alpha
\beta})$ gravitation... | [
{
"created": "Mon, 30 Jan 2023 15:57:22 GMT",
"version": "v1"
}
] | 2023-02-08 | [
[
"Yousaf",
"Z.",
""
],
[
"Bhatti",
"M. Z.",
""
],
[
"Aman",
"H.",
""
],
[
"Sahoo",
"P. K.",
""
]
] | This work is concerned to study the bouncing nature of the universe for an isotropic configuration of fluid $\mathcal{T}_{\alpha\beta}$ and Friedmann-Lema\^{i}tre-Robertson-Walker metric scheme. This work is carried out under the novel $f(\mathcal{G},\mathcal{T}_{\alpha \beta} \mathcal{T}^{\alpha \beta})$ gravitation b... |
1412.1527 | Ran Li | Ran Li, Junkun Zhao | Numerical study of superradiant instability for charged stringy black
hole-mirror system | 5 pages, 5 figures, accepted by PLB. arXiv admin note: text overlap
with arXiv:1403.7279 | Phys. Lett. B 740(2015)317-321 | 10.1016/j.physletb.2014.12.007 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We numerically study the superradiant instability of charged massless scalar
field in the background of charged stringy black hole with mirror-like boundary
condition. We compare the numerical result with the previous analytical result
and show the dependencies of this instability upon various parameters of black
hol... | [
{
"created": "Thu, 4 Dec 2014 00:55:44 GMT",
"version": "v1"
}
] | 2015-01-14 | [
[
"Li",
"Ran",
""
],
[
"Zhao",
"Junkun",
""
]
] | We numerically study the superradiant instability of charged massless scalar field in the background of charged stringy black hole with mirror-like boundary condition. We compare the numerical result with the previous analytical result and show the dependencies of this instability upon various parameters of black hole ... |
1109.3655 | S Habib Mazharimousavi | S. Habib Mazharimousavi, M. Halilsoy and T. Tahamtan | Constant curvature f(R) gravity minimally coupled with Yang-Mills field | 12 pages 2 figures, Some references and 2 figures are added with
minor changes. Final version for publication in European Physical Journal C | Eur. Phys. J. C (2012) 72:1958 | 10.1140/epjc/s10052-012-1958-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the particular class of f(R) gravities minimally coupled with
Yang - Mills (YM) field in which the Ricci scalar =R_{0}= constant in all
dimensions d\geq4. Even in this restricted class the spacetime has unlimited
scopes determined by an equation of state of the form P_{eff}={\omega}{\rho}.
Depending on th... | [
{
"created": "Fri, 16 Sep 2011 16:10:03 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Feb 2012 15:42:51 GMT",
"version": "v2"
},
{
"created": "Sat, 3 Mar 2012 19:43:55 GMT",
"version": "v3"
},
{
"created": "Mon, 12 Mar 2012 20:44:41 GMT",
"version": "v4"
}
] | 2012-04-02 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
],
[
"Tahamtan",
"T.",
""
]
] | We consider the particular class of f(R) gravities minimally coupled with Yang - Mills (YM) field in which the Ricci scalar =R_{0}= constant in all dimensions d\geq4. Even in this restricted class the spacetime has unlimited scopes determined by an equation of state of the form P_{eff}={\omega}{\rho}. Depending on the ... |
gr-qc/9312021 | Bill Pezzaglia | William M. Pezzaglia Jr | Multivector Solutions to the Hyper-Holomorphic Massive Dirac Equation | 13 pages (Latex), Report# clf-alg/pezz9302 | null | null | null | gr-qc hep-th | null | Attention is given to the interface of mathematics and physics, specifically
noting that fundamental principles limit the usefulness of otherwise perfectly
good mathematical general integral solutions. A new set of multivector
solutions to the meta-monogenic (massive) Dirac equation is constructed which
form a Hilber... | [
{
"created": "Wed, 15 Dec 1993 13:35:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pezzaglia",
"William M.",
"Jr"
]
] | Attention is given to the interface of mathematics and physics, specifically noting that fundamental principles limit the usefulness of otherwise perfectly good mathematical general integral solutions. A new set of multivector solutions to the meta-monogenic (massive) Dirac equation is constructed which form a Hilbert ... |
2101.01028 | Jan Smit | Jan Smit | Three models of non-perturbative quantum-gravitational binding | Improved presentation with additional references and special
attention to the dynamical triangulation (DT) part; extended and refined
analysis of the early DT results; 53 pages of which 20 in appendices and
references | null | null | null | gr-qc hep-lat hep-th | http://creativecommons.org/licenses/by/4.0/ | Known quantum and classical perturbative long-distance corrections to the
Newton potential are extended into the short-distance regime using evolution
equations for a `running' gravitational coupling, which is used to construct
examples non-perturbative potentials for the gravitational binding of two
particles. Model... | [
{
"created": "Mon, 4 Jan 2021 15:26:37 GMT",
"version": "v1"
},
{
"created": "Sun, 17 Jan 2021 20:13:46 GMT",
"version": "v2"
},
{
"created": "Sun, 22 Aug 2021 13:57:38 GMT",
"version": "v3"
}
] | 2021-08-24 | [
[
"Smit",
"Jan",
""
]
] | Known quantum and classical perturbative long-distance corrections to the Newton potential are extended into the short-distance regime using evolution equations for a `running' gravitational coupling, which is used to construct examples non-perturbative potentials for the gravitational binding of two particles. Model-I... |
gr-qc/9304019 | Piotr T. Chrusciel | Lars Andersson, Piotr T. Chrusciel | On ``hyperboloidal'' Cauchy data for vacuum Einstein equations and
obstructions to smoothness of ``null infinity'' | 8 pages, revtex style | Phys.Rev.Lett. 70 (1993) 2829-2832 | 10.1103/PhysRevLett.70.2829 | null | gr-qc | null | Various works have suggested that the Bondi--Sachs--Penrose decay conditions
on the gravitational field at null infinity are not generally representative of
asymptotically flat space--times. We have made a detailed analysis of the
constraint equations for ``asymptotically hyperboloidal'' initial data and find
that lo... | [
{
"created": "Thu, 15 Apr 1993 20:19:54 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Andersson",
"Lars",
""
],
[
"Chrusciel",
"Piotr T.",
""
]
] | Various works have suggested that the Bondi--Sachs--Penrose decay conditions on the gravitational field at null infinity are not generally representative of asymptotically flat space--times. We have made a detailed analysis of the constraint equations for ``asymptotically hyperboloidal'' initial data and find that log ... |
2001.04494 | Tommi Markkanen | Tommi Markkanen and Arttu Rajantie | Scalar correlation functions for a double-well potential in de Sitter
space | 21 pages, 12 figures. v2: fixed typos, updated references. v3:
improved figures, to be published in JCAP | null | 10.1088/1475-7516/2020/03/049 | IMPERIAL-TP-2020-AR-1 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the spectral representation of the stochastic Starobinsky-Yokoyama
approach to compute correlation functions in de Sitter space for a scalar field
with a symmetric or asymmetric double-well potential. The terms in the spectral
expansion are determined by the eigenvalues and eigenfunctions of the
time-independe... | [
{
"created": "Mon, 13 Jan 2020 19:04:14 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Jan 2020 11:01:32 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Feb 2020 13:12:28 GMT",
"version": "v3"
}
] | 2020-03-26 | [
[
"Markkanen",
"Tommi",
""
],
[
"Rajantie",
"Arttu",
""
]
] | We use the spectral representation of the stochastic Starobinsky-Yokoyama approach to compute correlation functions in de Sitter space for a scalar field with a symmetric or asymmetric double-well potential. The terms in the spectral expansion are determined by the eigenvalues and eigenfunctions of the time-independent... |
2109.11138 | Vladimir Folomeev | Vladimir Dzhunushaliev and Vladimir Folomeev | Axially symmetric Proca-Higgs boson stars | 9 pages, 2 figures, minor corrections to content, version published
in PRD | Phys. Rev. D 104, 104024 (2021) | 10.1103/PhysRevD.104.104024 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider strongly gravitating configurations consisting of coupled real
Higgs scalar field and vector (Proca) field of mass $\mu_P$. For such a system,
we find static regular axially symmetric solutions describing asymptotically
flat configurations which may be referred to as Proca-Higgs miniboson stars,
since the... | [
{
"created": "Thu, 23 Sep 2021 04:40:39 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Nov 2021 08:05:57 GMT",
"version": "v2"
}
] | 2021-11-11 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
]
] | We consider strongly gravitating configurations consisting of coupled real Higgs scalar field and vector (Proca) field of mass $\mu_P$. For such a system, we find static regular axially symmetric solutions describing asymptotically flat configurations which may be referred to as Proca-Higgs miniboson stars, since their... |
1608.03808 | Yuri Obukhov | Yuri N. Obukhov, Alexander J. Silenko, and Oleg V. Teryaev | Manifestations of the rotation and gravity of the Earth in high-energy
physics experiments | 13 pages, Revtex | Phys. Rev. D 94, 044019 (2016) | 10.1103/PhysRevD.94.044019 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inertial (due to rotation) and gravitational fields of the Earth affect
the motion of an elementary particle and its spin dynamics. This influence is
not negligible and should be taken into account in high-energy physics
experiments. Earth's influence is manifest in perturbations in the particle
motion, in an add... | [
{
"created": "Thu, 11 Aug 2016 08:47:20 GMT",
"version": "v1"
}
] | 2016-08-15 | [
[
"Obukhov",
"Yuri N.",
""
],
[
"Silenko",
"Alexander J.",
""
],
[
"Teryaev",
"Oleg V.",
""
]
] | The inertial (due to rotation) and gravitational fields of the Earth affect the motion of an elementary particle and its spin dynamics. This influence is not negligible and should be taken into account in high-energy physics experiments. Earth's influence is manifest in perturbations in the particle motion, in an addit... |
gr-qc/0506129 | Parampreet Singh | Rituparno Goswami, Pankaj S. Joshi, Parampreet Singh | Quantum evaporation of a naked singularity | 4 pages, 2 figures. Minor changes to match published version in
Physical Review Letters | Phys.Rev.Lett. 96 (2006) 031302 | 10.1103/PhysRevLett.96.031302 | IGPG-05/6-8 | gr-qc astro-ph hep-th | null | We investigate here quantum effects in gravitational collapse of a scalar
field model which classically leads to a naked singularity. We show that
non-perturbative semi-classical modifications near the singularity, based on
loop quantum gravity, give rise to a strong outward flux of energy. This leads
to the dissolut... | [
{
"created": "Tue, 28 Jun 2005 22:27:28 GMT",
"version": "v1"
},
{
"created": "Sun, 22 Jan 2006 18:05:48 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Goswami",
"Rituparno",
""
],
[
"Joshi",
"Pankaj S.",
""
],
[
"Singh",
"Parampreet",
""
]
] | We investigate here quantum effects in gravitational collapse of a scalar field model which classically leads to a naked singularity. We show that non-perturbative semi-classical modifications near the singularity, based on loop quantum gravity, give rise to a strong outward flux of energy. This leads to the dissolutio... |
1004.3569 | David Garfinkle | Ryo Saotome, Ratindranath Akhoury and David Garfinkle | Examining gravitational collapse with test scalar fields | 10 pages, 11 figures, references added | Class.Quant.Grav.27:165019,2010 | 10.1088/0264-9381/27/16/165019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Numerical simulations are performed of a test scalar field in a spacetime
undergoing gravitational collapse. The behavior of the scalar field near the
singularity is examined and implications for generic singularities are
discussed. In particular, our example is the first confirmation of the BKL
conjecture for an asy... | [
{
"created": "Tue, 20 Apr 2010 20:40:33 GMT",
"version": "v1"
},
{
"created": "Wed, 5 May 2010 12:32:20 GMT",
"version": "v2"
}
] | 2011-09-12 | [
[
"Saotome",
"Ryo",
""
],
[
"Akhoury",
"Ratindranath",
""
],
[
"Garfinkle",
"David",
""
]
] | Numerical simulations are performed of a test scalar field in a spacetime undergoing gravitational collapse. The behavior of the scalar field near the singularity is examined and implications for generic singularities are discussed. In particular, our example is the first confirmation of the BKL conjecture for an asymp... |
0901.2358 | Gary Poon | Gary Poon | Relative Unitary Implementability of Perturbed Quantum Field Dynamics on
de-Sitter Space | PhD Thesis, 33 Pages | J.Math.Phys.51:042503,2010 | 10.1063/1.3387251 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we study the quantum dynamics of a Klein-Gordon field on
de-Sitter space. We prove time evolution is not unitarily implementable. We
also consider a Klein-Gordon field perturbed by a local potential V. In this
case we prove that the deviation from the V=0 dynamics is unitarily
implementable.
| [
{
"created": "Thu, 15 Jan 2009 22:09:50 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jun 2009 18:57:27 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Poon",
"Gary",
""
]
] | In this article, we study the quantum dynamics of a Klein-Gordon field on de-Sitter space. We prove time evolution is not unitarily implementable. We also consider a Klein-Gordon field perturbed by a local potential V. In this case we prove that the deviation from the V=0 dynamics is unitarily implementable. |
1502.06539 | David Wallace | David Wallace | Fields as Bodies: a unified presentation of spacetime and internal gauge
symmetry | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the parametrised representation of field theory (in which the location
in spacetime of a part of a field is itself represented by a map from the base
manifold to Minkowski spacetime) I demonstrate that in both local and global
cases, internal (Yang-Mills-type) and spacetime (Poincar\'{e}) symmetries can
be trea... | [
{
"created": "Mon, 23 Feb 2015 18:27:40 GMT",
"version": "v1"
}
] | 2015-02-24 | [
[
"Wallace",
"David",
""
]
] | Using the parametrised representation of field theory (in which the location in spacetime of a part of a field is itself represented by a map from the base manifold to Minkowski spacetime) I demonstrate that in both local and global cases, internal (Yang-Mills-type) and spacetime (Poincar\'{e}) symmetries can be treate... |
1302.6658 | Shahar Hod | Shahar Hod | Cosmic Censorship: Formation of a Shielding Horizon Around a Fragile
Horizon | 4 pages | Physical Review D 87, 024037 (2013) | 10.1103/PhysRevD.87.024037 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The weak cosmic censorship conjecture asserts that spacetime singularities
that arise in gravitational collapse are always hidden inside of black holes,
invisible to distant observers. This conjecture, put forward by Penrose more
than four decades ago, is widely believed to be one of the basic principles of
nature. H... | [
{
"created": "Wed, 27 Feb 2013 03:51:27 GMT",
"version": "v1"
}
] | 2015-06-15 | [
[
"Hod",
"Shahar",
""
]
] | The weak cosmic censorship conjecture asserts that spacetime singularities that arise in gravitational collapse are always hidden inside of black holes, invisible to distant observers. This conjecture, put forward by Penrose more than four decades ago, is widely believed to be one of the basic principles of nature. How... |
1909.10372 | Lijing Shao | Rui Xu, Junjie Zhao, Lijing Shao | Neutron Star Structure in the Minimal Gravitational Standard-Model
Extension and the Implication to Continuous Gravitational Waves | 9 pages, 2 figures; accepted by Physics Letters B | Physics Letters B 803 (2020) 135283 | 10.1016/j.physletb.2020.135283 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Tiny violation of Lorentz invariance has been the subject of theoretic study
and experimental test for a long time. We use the Standard-Model Extension
(SME) framework to investigate the effect of the minimal Lorentz violation on
the structure of a neutron star. A set of hydrostatic equations with
modifications from ... | [
{
"created": "Mon, 23 Sep 2019 13:59:56 GMT",
"version": "v1"
},
{
"created": "Sat, 8 Feb 2020 04:54:38 GMT",
"version": "v2"
}
] | 2020-02-17 | [
[
"Xu",
"Rui",
""
],
[
"Zhao",
"Junjie",
""
],
[
"Shao",
"Lijing",
""
]
] | Tiny violation of Lorentz invariance has been the subject of theoretic study and experimental test for a long time. We use the Standard-Model Extension (SME) framework to investigate the effect of the minimal Lorentz violation on the structure of a neutron star. A set of hydrostatic equations with modifications from Lo... |
1511.00491 | Burin Gumjudpai | Burin Gumjudpai (IF Naresuan) and Phongsaphat Rangdee (IF Naresuan) | Non-minimal derivative coupling gravity in cosmology | 11 pages, 2 figures with additional references and corrections | General Relativity and Gravitation 47 (2015) 140 | 10.1007/s10714-015-1985-2 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a brief review of the non-minimal derivative coupling (NMDC) scalar
field theory in which there is non-minimal coupling between the scalar field
derivative term and the Einstein tensor. We assume that the expansion is of
power-law type or super-acceleration type for small redshift. The Lagrangian
includes the... | [
{
"created": "Mon, 2 Nov 2015 13:28:18 GMT",
"version": "v1"
},
{
"created": "Tue, 3 May 2016 06:07:42 GMT",
"version": "v2"
},
{
"created": "Sun, 12 Jan 2020 14:35:55 GMT",
"version": "v3"
}
] | 2020-01-14 | [
[
"Gumjudpai",
"Burin",
"",
"IF Naresuan"
],
[
"Rangdee",
"Phongsaphat",
"",
"IF Naresuan"
]
] | We give a brief review of the non-minimal derivative coupling (NMDC) scalar field theory in which there is non-minimal coupling between the scalar field derivative term and the Einstein tensor. We assume that the expansion is of power-law type or super-acceleration type for small redshift. The Lagrangian includes the N... |
1311.0239 | Jean-Pierre Lasota | M.A. Abramowicz, W. Klu\'zniak, and J.-P. Lasota | Mass of a Black Hole Firewall | 6 pages, version published in Phys. Rev. Lett | Phys. Rev. Lett. 112, 091301 (2014) | 10.1103/PhysRevLett.112.091301 | NSF-KITP-14-017 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum entanglement of Hawking radiation has been supposed to give rise to a
Planck density "firewall" near the event horizon of old black holes. We show
that Planck density firewalls are excluded by Einstein's equations for black
holes of mass exceeding the Planck mass. We find an upper limit of $1/(8\pi M)$
to the... | [
{
"created": "Fri, 1 Nov 2013 18:00:44 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Feb 2014 10:05:26 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Mar 2014 15:24:56 GMT",
"version": "v3"
}
] | 2014-03-06 | [
[
"Abramowicz",
"M. A.",
""
],
[
"Kluźniak",
"W.",
""
],
[
"Lasota",
"J. -P.",
""
]
] | Quantum entanglement of Hawking radiation has been supposed to give rise to a Planck density "firewall" near the event horizon of old black holes. We show that Planck density firewalls are excluded by Einstein's equations for black holes of mass exceeding the Planck mass. We find an upper limit of $1/(8\pi M)$ to the s... |
2403.14596 | Pedro Fernandes | Pedro G. S. Fernandes, Clare Burrage, Astrid Eichhorn, Thomas P.
Sotiriou | Shadows and Properties of Spin-Induced Scalarized Black Holes with and
without a Ricci Coupling | 8 pages, 6 figures | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we explore the properties and shadows of spin-induced
scalarized black holes, as well as investigate how a Ricci coupling influences
them. Our findings reveal significant deviations from the Kerr metric in terms
of the location and geodesic frequencies of the innermost stable circular orbit
and light ri... | [
{
"created": "Thu, 21 Mar 2024 17:49:53 GMT",
"version": "v1"
}
] | 2024-03-22 | [
[
"Fernandes",
"Pedro G. S.",
""
],
[
"Burrage",
"Clare",
""
],
[
"Eichhorn",
"Astrid",
""
],
[
"Sotiriou",
"Thomas P.",
""
]
] | In this work, we explore the properties and shadows of spin-induced scalarized black holes, as well as investigate how a Ricci coupling influences them. Our findings reveal significant deviations from the Kerr metric in terms of the location and geodesic frequencies of the innermost stable circular orbit and light ring... |
1308.1521 | Nigel Bishop | Nigel T Bishop and Christian Reisswig | The gravitational wave strain in the characteristic formalism of
numerical relativity | 9 pages, 3 figures | General Relativity and Gravitation (2014) 46:1643 | 10.1007/s10714-013-1643-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The extraction of the gravitational wave signal, within the context of a
characteristic numerical evolution is revisited. A formula for the
gravitational wave strain is developed and tested, and is made publicly
available as part of the PITT code within the Einstein Toolkit. Using the new
strain formula, we show that... | [
{
"created": "Wed, 7 Aug 2013 09:45:53 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Dec 2013 13:26:40 GMT",
"version": "v2"
}
] | 2013-12-18 | [
[
"Bishop",
"Nigel T",
""
],
[
"Reisswig",
"Christian",
""
]
] | The extraction of the gravitational wave signal, within the context of a characteristic numerical evolution is revisited. A formula for the gravitational wave strain is developed and tested, and is made publicly available as part of the PITT code within the Einstein Toolkit. Using the new strain formula, we show that a... |
gr-qc/9507045 | Maria Bento | M.C. Bento and O. Bertolami | Constraints on Supergravity Chaotic Inflationary Models | Latex file, 10 pages; important changes and references added | Phys.Lett. B365 (1996) 59-63 | 10.1016/0370-2693(95)01169-2 | CERN-TH/95-199, DFTT 44/95 | gr-qc | null | We discuss, in the context of $N=1$ hidden sector non-minimal supergravity
chaotic inflationary models, constraints on the parameters of a polynomial
superpotential resulting from existing bounds on the reheating temperature and
on the amplitude of the primordial energy density fluctuations as inferred from
COBE. We ... | [
{
"created": "Sat, 22 Jul 1995 13:55:57 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Oct 1995 16:25:04 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Bento",
"M. C.",
""
],
[
"Bertolami",
"O.",
""
]
] | We discuss, in the context of $N=1$ hidden sector non-minimal supergravity chaotic inflationary models, constraints on the parameters of a polynomial superpotential resulting from existing bounds on the reheating temperature and on the amplitude of the primordial energy density fluctuations as inferred from COBE. We pr... |
gr-qc/9708038 | Simon Hern | S. D. Hern and J. M. Stewart (DAMTP, Cambridge) | The Gowdy T3 Cosmologies revisited | 11 pages, LaTeX, 6 figures, results and conclusions revised and
(considerably) expanded | Class.Quant.Grav. 15 (1998) 1581-1593 | 10.1088/0264-9381/15/6/014 | R-97/41 | gr-qc | null | We have examined, repeated and extended earlier numerical calculations of
Berger and Moncrief for the evolution of unpolarized Gowdy T3 cosmological
models. Our results are consistent with theirs and we support their claim that
the models exhibit AVTD behaviour, even though spatial derivatives cannot be
neglected. Th... | [
{
"created": "Mon, 18 Aug 1997 17:18:36 GMT",
"version": "v1"
},
{
"created": "Tue, 5 May 1998 14:09:07 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Hern",
"S. D.",
"",
"DAMTP, Cambridge"
],
[
"Stewart",
"J. M.",
"",
"DAMTP, Cambridge"
]
] | We have examined, repeated and extended earlier numerical calculations of Berger and Moncrief for the evolution of unpolarized Gowdy T3 cosmological models. Our results are consistent with theirs and we support their claim that the models exhibit AVTD behaviour, even though spatial derivatives cannot be neglected. The ... |
1411.7402 | Anja Marunovic | Anja Marunovic and Tomislav Prokopec | Global monopoles can change Universe's topology | 5 pages, 1 figure; introduction changed; matches published version | null | 10.1016/j.physletb.2016.03.030 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | If the Universe undergoes a phase transition, at which global monopoles are
created or destroyed, topology of its spatial sections can change. More
specifically, by making use of Myers' theorem, we show that, after a transition
in which global monopoles form, spatial sections of a spatially flat Universe
become finit... | [
{
"created": "Wed, 26 Nov 2014 21:29:11 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Dec 2014 16:38:14 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Mar 2016 17:04:24 GMT",
"version": "v3"
}
] | 2017-03-15 | [
[
"Marunovic",
"Anja",
""
],
[
"Prokopec",
"Tomislav",
""
]
] | If the Universe undergoes a phase transition, at which global monopoles are created or destroyed, topology of its spatial sections can change. More specifically, by making use of Myers' theorem, we show that, after a transition in which global monopoles form, spatial sections of a spatially flat Universe become finite ... |
0903.4395 | Leonid Grishchuk P | L P Grishchuk | Some Uncomfortable Thoughts on the Nature of Gravity, Cosmology, and the
Early Universe | 16 pages, including 4 figures and 2 photographs. Contribution to the
'Nature of Gravity' conference at the International Space Science Institute,
October 2008, Bern, Switzerland; v.2 takes into account the referee comments,
to be published in Space Science Reviews | Space Sci.Rev.148:315-328,2009 | 10.1007/s11214-009-9509-6 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A specific theoretical framework is important for designing and conducting an
experiment, and for interpretation of its results. The field of gravitational
physics is expanding, and more clarity is needed. It appears that some popular
notions, such as `inflation' and `gravity is geometry', have become more like
liabi... | [
{
"created": "Wed, 25 Mar 2009 18:11:54 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Apr 2009 17:34:15 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Grishchuk",
"L P",
""
]
] | A specific theoretical framework is important for designing and conducting an experiment, and for interpretation of its results. The field of gravitational physics is expanding, and more clarity is needed. It appears that some popular notions, such as `inflation' and `gravity is geometry', have become more like liabili... |
0811.4178 | Rosales Garcia J.Juan | J.J. Rosales and V.I. Tkach | Supersymmetric Cosmology and Dark Energy | This article is a contribution to the anniversary volume "The
Problems of Modern Cosmology". On the occasion of the 50th birthday of Prof.
S.D. Odintsov. Editor Prof. P.M. Lavrov | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the superfield approach we construct the n = 2 supersymmetric
lagrangian for the FRW Universe with perfect fluid as matter fields. The
obtained supersymmetric algebra allowed us to take the square root of the
Wheeler-DeWitt equation and solve the corresponding quantum constraint. This
model leads to the relatio... | [
{
"created": "Tue, 25 Nov 2008 21:08:17 GMT",
"version": "v1"
}
] | 2008-11-27 | [
[
"Rosales",
"J. J.",
""
],
[
"Tkach",
"V. I.",
""
]
] | Using the superfield approach we construct the n = 2 supersymmetric lagrangian for the FRW Universe with perfect fluid as matter fields. The obtained supersymmetric algebra allowed us to take the square root of the Wheeler-DeWitt equation and solve the corresponding quantum constraint. This model leads to the relation ... |
gr-qc/0603033 | Martin Tajmar | M. Tajmar, F. Plesescu, K. Marhold, C.J. de Matos | Experimental Detection of the Gravitomagnetic London Moment | Submitted to Physica C | null | null | null | gr-qc | null | It is well known that a rotating superconductor produces a magnetic field
proportional to its angular velocity. The authors conjectured earlier, that in
addition to this so-called London moment, also a large gravitomagnetic field
should appear to explain an apparent mass increase of Niobium Cooper-pairs.
This phenome... | [
{
"created": "Thu, 9 Mar 2006 18:41:11 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Tajmar",
"M.",
""
],
[
"Plesescu",
"F.",
""
],
[
"Marhold",
"K.",
""
],
[
"de Matos",
"C. J.",
""
]
] | It is well known that a rotating superconductor produces a magnetic field proportional to its angular velocity. The authors conjectured earlier, that in addition to this so-called London moment, also a large gravitomagnetic field should appear to explain an apparent mass increase of Niobium Cooper-pairs. This phenomeno... |
gr-qc/0105087 | Angelo Tartaglia | A. Tartaglia, M.L. Ruggiero | A comment on a proposal to use neutrons to reveal gravitomagnetic
effects on Earth | 1 page, Latex | null | null | null | gr-qc | null | Arguments are presented which show that the recent proposals of using
neutrons to test gravitomagnetic effects on Earth are impracticable.
| [
{
"created": "Thu, 24 May 2001 13:41:14 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Tartaglia",
"A.",
""
],
[
"Ruggiero",
"M. L.",
""
]
] | Arguments are presented which show that the recent proposals of using neutrons to test gravitomagnetic effects on Earth are impracticable. |
gr-qc/0601127 | James Mattingly | James Mattingly | Why Eppley and Hannah's Experiment Isn't | 10 pages | Phys.Rev. D73 (2006) 064025 | 10.1103/PhysRevD.73.064025 | null | gr-qc | null | It is shown that Eppley and Hannah's thought experiment establishing that
gravity must be quantized is fatally flawed. The device they propose, even if
built, cannot establish their claims, nor is it plausible that it can be built
with any materials compatible with the values of c, h, and G. Finally the
device, and a... | [
{
"created": "Sun, 29 Jan 2006 01:17:07 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Mattingly",
"James",
""
]
] | It is shown that Eppley and Hannah's thought experiment establishing that gravity must be quantized is fatally flawed. The device they propose, even if built, cannot establish their claims, nor is it plausible that it can be built with any materials compatible with the values of c, h, and G. Finally the device, and any... |
2211.10736 | Hermano Velten | Diego Santos de Jesus, Hermano Velten and Federico Piazza | Constraining the anomalous coupling of gravitational waves with double
pulsar | 5 pages, 2 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We revisit the decay of the orbital period in binary systems that occurs due
to the emission of gravitational waves in the context of modified gravity
models where the coupling $G_{gw}$ between matter and on-shell gravitons is
allowed to differ from the Newton constant $G_N$. Using the most precise
orbital parameters... | [
{
"created": "Sat, 19 Nov 2022 16:12:14 GMT",
"version": "v1"
}
] | 2022-11-22 | [
[
"de Jesus",
"Diego Santos",
""
],
[
"Velten",
"Hermano",
""
],
[
"Piazza",
"Federico",
""
]
] | We revisit the decay of the orbital period in binary systems that occurs due to the emission of gravitational waves in the context of modified gravity models where the coupling $G_{gw}$ between matter and on-shell gravitons is allowed to differ from the Newton constant $G_N$. Using the most precise orbital parameters o... |
2011.13586 | Lang Liu | Lang Liu, {\O}yvind Christiansen, Wen-Hong Ruan, Zong-Kuan Guo,
Rong-Gen Cai and Sang Pyo Kim | Gravitational and electromagnetic radiation from binary black holes with
electric and magnetic charges: Elliptical orbits on a cone | 10 pages, 2 figures, a new section added | Eur.Phys.J. C (2021) | 10.1140/epjc/s10052-021-09849-4 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extending the electromagnetic and gravitational radiations from binary black
holes with electric and magnetic charges in circular orbits in Phys. Rev. D
{\bf 102}, 103520 (2020), we calculate the total emission rates of energy and
angular momentum due to gravitational and electromagnetic radiations from
dyonic binary... | [
{
"created": "Fri, 27 Nov 2020 07:23:23 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Dec 2021 03:37:57 GMT",
"version": "v2"
}
] | 2021-12-02 | [
[
"Liu",
"Lang",
""
],
[
"Christiansen",
"Øyvind",
""
],
[
"Ruan",
"Wen-Hong",
""
],
[
"Guo",
"Zong-Kuan",
""
],
[
"Cai",
"Rong-Gen",
""
],
[
"Kim",
"Sang Pyo",
""
]
] | Extending the electromagnetic and gravitational radiations from binary black holes with electric and magnetic charges in circular orbits in Phys. Rev. D {\bf 102}, 103520 (2020), we calculate the total emission rates of energy and angular momentum due to gravitational and electromagnetic radiations from dyonic binary b... |
2201.03365 | Reggie Pantig | Reggie C. Pantig, Ali \"Ovg\"un | Dark matter effect on the weak deflection angle by black holes at the
center of Milky Way and M87 galaxies | 11 pages, 9 figures. Corrected some typos, added Einstein ring
discussion | Eur. Phys. J. C (2022) 82:391 | 10.1140/epjc/s10052-022-10319-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigated the effect of dark matter on the weak
deflection angle by black holes at the galactic center. We consider three known
dark matter density profiles such as the Cold Dark Matter (CDM), Scalar Field
Dark Matter (SFDM), and the Universal Rotation Curve (URC) from the Burkert
profile. To ach... | [
{
"created": "Mon, 10 Jan 2022 14:30:38 GMT",
"version": "v1"
},
{
"created": "Sat, 5 Feb 2022 23:59:57 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Feb 2022 08:05:37 GMT",
"version": "v3"
}
] | 2022-05-04 | [
[
"Pantig",
"Reggie C.",
""
],
[
"Övgün",
"Ali",
""
]
] | In this paper, we investigated the effect of dark matter on the weak deflection angle by black holes at the galactic center. We consider three known dark matter density profiles such as the Cold Dark Matter (CDM), Scalar Field Dark Matter (SFDM), and the Universal Rotation Curve (URC) from the Burkert profile. To achie... |
2206.00721 | Vasilis Oikonomou | V.K. Oikonomou, Eirini C. Lymperiadou | Effects of a Geometrically Realized Early Dark Energy Era on the
Spectrum of Primordial Gravitational Waves | Accepted in Symmetry, invited article | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we investigate the effects of a geometrically generated early
dark energy era on the energy spectrum of the primordial gravitational waves.
The early dark energy era, which we choose it to have a constant equation of
state parameter $w$, is synergistically generated by an appropriate $f(R)$
gravity in th... | [
{
"created": "Wed, 1 Jun 2022 19:18:17 GMT",
"version": "v1"
}
] | 2022-06-03 | [
[
"Oikonomou",
"V. K.",
""
],
[
"Lymperiadou",
"Eirini C.",
""
]
] | In this work we investigate the effects of a geometrically generated early dark energy era on the energy spectrum of the primordial gravitational waves. The early dark energy era, which we choose it to have a constant equation of state parameter $w$, is synergistically generated by an appropriate $f(R)$ gravity in the ... |
1901.03746 | Naeem Ahmad Pundeer Pundeer | Musavvir Ali, Naeem Ahmad Pundeer and Zafar Ahsan | Semiconformal symmetry- A new symmetry of the spacetime manifold of the
general relativity | null | null | 10.22436/jmcs.020.03.07 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | In this paper we have introduced a new symmetry property of spacetime which
is named as semiconformal curvature collineation, and its relationship with
other known symmetry properties has been established. This new symmetry
property of the spacetime has also been studied for non-null and null
electromagnetic fields.
| [
{
"created": "Thu, 10 Jan 2019 07:34:36 GMT",
"version": "v1"
}
] | 2023-05-30 | [
[
"Ali",
"Musavvir",
""
],
[
"Pundeer",
"Naeem Ahmad",
""
],
[
"Ahsan",
"Zafar",
""
]
] | In this paper we have introduced a new symmetry property of spacetime which is named as semiconformal curvature collineation, and its relationship with other known symmetry properties has been established. This new symmetry property of the spacetime has also been studied for non-null and null electromagnetic fields. |
1807.08310 | Itzhak Bars | Itzhak Bars | Wavefunction for the Universe Circa the Beginning with Dynamically
Determined Unique Initial Conditions | 40 pages, 9 figures. Version 2 has a new subsection VIII-D, and also
contains some minor corrections and additions | Phys. Rev. D 98, 103510 (2018) | 10.1103/PhysRevD.98.103510 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper I will first outline an effective field theory for cosmology
(EFTC) that is based on the Standard Model coupled to General Relativity and
improved with Weyl symmetry. There are no new physical degrees of freedom in
this theory, but what is new is an enlargement of the domain of the existing
physical fie... | [
{
"created": "Sun, 22 Jul 2018 16:19:17 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Oct 2018 09:49:27 GMT",
"version": "v2"
}
] | 2018-11-21 | [
[
"Bars",
"Itzhak",
""
]
] | In this paper I will first outline an effective field theory for cosmology (EFTC) that is based on the Standard Model coupled to General Relativity and improved with Weyl symmetry. There are no new physical degrees of freedom in this theory, but what is new is an enlargement of the domain of the existing physical field... |
1904.06503 | Hao Xu | Hao Xu, Man-Hong Yung | Black hole evaporation in Lovelock gravity with diverse dimensions | 6 pages + references, 3 figures;minor corrections, references added,
published version | Physics Letters B 794 (2019) 77-82 | 10.1016/j.physletb.2019.05.031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the black hole evaporation process in Lovelock gravity with
diverse dimensions. By selecting the appropriate coefficients, the space-time
solutions can possess a unique AdS vacuum with a fixed cosmological constant
$\Lambda=-\frac{(d-1)(d-2)}{2\ell^{2}}$. The black hole solutions can be
divided into tw... | [
{
"created": "Sat, 13 Apr 2019 08:14:54 GMT",
"version": "v1"
},
{
"created": "Thu, 30 May 2019 05:53:33 GMT",
"version": "v2"
}
] | 2019-05-31 | [
[
"Xu",
"Hao",
""
],
[
"Yung",
"Man-Hong",
""
]
] | We investigate the black hole evaporation process in Lovelock gravity with diverse dimensions. By selecting the appropriate coefficients, the space-time solutions can possess a unique AdS vacuum with a fixed cosmological constant $\Lambda=-\frac{(d-1)(d-2)}{2\ell^{2}}$. The black hole solutions can be divided into two ... |
gr-qc/0512042 | Piotr T. Chru\'sciel | Piotr T. Chrusciel, Daniel Maerten | Killing vectors in asymptotically flat space--times: II. Asymptotically
translational Killing vectors and the rigid positive energy theorem in higher
dimensions | null | J.Math.Phys. 47 (2006) 022502 | 10.1063/1.2167809 | Newton Institute preprint NI05062-GMR | gr-qc | null | We show that the borderline cases in the proof of the positive energy theorem
for initial data sets, on spin manifolds, in dimensions $n\ge 3$, are only
possible for initial data arising from embeddings in Minkowski space-time.
| [
{
"created": "Tue, 6 Dec 2005 20:20:38 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Chrusciel",
"Piotr T.",
""
],
[
"Maerten",
"Daniel",
""
]
] | We show that the borderline cases in the proof of the positive energy theorem for initial data sets, on spin manifolds, in dimensions $n\ge 3$, are only possible for initial data arising from embeddings in Minkowski space-time. |
gr-qc/0005047 | Robert Beig | Robert Beig, Bernd G. Schmidt | Time-Independent Gravitational Fields | 47 pages, LaTeX, uses Springer cl2emult style | Lect.Notes Phys.540:325-372,2000 | null | UWThPh1999-1 | gr-qc | null | This article reviews, from a global point of view, rigorous results on time
independent spacetimes. Throughout attention is confined to isolated bodies at
rest or in uniform rotation in an otherwise empty universe. The discussion
starts from first principles and is, as much as possible, self-contained.
| [
{
"created": "Sat, 13 May 2000 08:16:11 GMT",
"version": "v1"
}
] | 2011-08-11 | [
[
"Beig",
"Robert",
""
],
[
"Schmidt",
"Bernd G.",
""
]
] | This article reviews, from a global point of view, rigorous results on time independent spacetimes. Throughout attention is confined to isolated bodies at rest or in uniform rotation in an otherwise empty universe. The discussion starts from first principles and is, as much as possible, self-contained. |
gr-qc/9506066 | null | Giampiero Esposito, Alexander Yu. Kamenshchik, Igor V. Mishakov,
Giuseppe Pollifrone | Gravitons in One-Loop Quantum Cosmology: Correspondence Between
Covariant and Non-Covariant Formalisms | 29 pages, latex, recently appearing in Physical Review D, volume 50,
pages 6329-6337, November 1994. The authors apologize for the delay in
circulating the paper, due to technical problems now fixed | Phys.Rev. D50 (1994) 6329-6337 | 10.1103/PhysRevD.50.6329 | DSF 94/14 | gr-qc | null | The discrepancy between the results of covariant and non-covariant one-loop
calculations for higher-spin fields in quantum cosmology is analyzed. A
detailed mode-by-mode study of perturbative quantum gravity about a flat
Euclidean background bounded by two concentric 3-spheres, including
non-physical degrees of freed... | [
{
"created": "Wed, 28 Jun 1995 06:47:27 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Esposito",
"Giampiero",
""
],
[
"Kamenshchik",
"Alexander Yu.",
""
],
[
"Mishakov",
"Igor V.",
""
],
[
"Pollifrone",
"Giuseppe",
""
]
] | The discrepancy between the results of covariant and non-covariant one-loop calculations for higher-spin fields in quantum cosmology is analyzed. A detailed mode-by-mode study of perturbative quantum gravity about a flat Euclidean background bounded by two concentric 3-spheres, including non-physical degrees of freedom... |
gr-qc/9411001 | Erik A. Martinez | Valeri Frolov and Erik A. Martinez | Action and Hamiltonian for eternal black holes | 24 pages, Revtex, 5 figures (available upon request) | Class.Quant.Grav. 13 (1996) 481-496 | 10.1088/0264-9381/13/3/013 | Alberta-Thy-32-94 | gr-qc hep-th | null | We present the Hamiltonian, quasilocal energy, and angular momentum for a
spacetime region spatially bounded by two timelike surfaces. The results are
applied to the particular case of a spacetime representing an eternal black
hole. It is shown that in the case when the boundaries are located in two
different wedges ... | [
{
"created": "Tue, 1 Nov 1994 15:30:17 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Frolov",
"Valeri",
""
],
[
"Martinez",
"Erik A.",
""
]
] | We present the Hamiltonian, quasilocal energy, and angular momentum for a spacetime region spatially bounded by two timelike surfaces. The results are applied to the particular case of a spacetime representing an eternal black hole. It is shown that in the case when the boundaries are located in two different wedges of... |
1509.09086 | Beatriz Elizaga Navascu\'es | Jer\'onimo Cortez, Beatriz Elizaga Navascu\'es, Mercedes
Mart\'in-Benito, Guillermo A. Mena Marug\'an, and Jos\'e M. Velhinho | Unitary evolution and uniqueness of the Fock representation of Dirac
fields in cosmological spacetimes | 24 pages | Phys. Rev. D 92, 105013 (2015) | 10.1103/PhysRevD.92.105013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a privileged Fock quantization of a massive Dirac field in a
closed Friedmann-Robertson-Walker cosmology, partially selected by the criteria
of invariance of the vacuum under the symmetries of the field equations, and
unitary implementation of the dynamics. When quantizing free scalar fields in
homogeneous... | [
{
"created": "Wed, 30 Sep 2015 09:08:42 GMT",
"version": "v1"
}
] | 2015-11-11 | [
[
"Cortez",
"Jerónimo",
""
],
[
"Navascués",
"Beatriz Elizaga",
""
],
[
"Martín-Benito",
"Mercedes",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
],
[
"Velhinho",
"José M.",
""
]
] | We present a privileged Fock quantization of a massive Dirac field in a closed Friedmann-Robertson-Walker cosmology, partially selected by the criteria of invariance of the vacuum under the symmetries of the field equations, and unitary implementation of the dynamics. When quantizing free scalar fields in homogeneous a... |
gr-qc/9612017 | Kristin Schleich | Donald Witt and Kristin Schleich | Toward a definition of chaos for general relativity | 5 pages. Amstex 2.1; also requires included fic.sty macro. Paper to
appear in Proceedings of the Sixth Canadian Conference on General Relativity
and Relativistic Astrophysics, The Fields Institute Communications Series | null | null | null | gr-qc | null | General relativity exhibits a unique feature not represented in standard
examples of chaotic systems; it is a spacetime diffeomorphism invariant theory.
Thus many characterizations of chaos do not work. It is therefore necessary to
develop a definition of chaos suitable for application to general relativity.
This pre... | [
{
"created": "Fri, 6 Dec 1996 18:46:09 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Witt",
"Donald",
""
],
[
"Schleich",
"Kristin",
""
]
] | General relativity exhibits a unique feature not represented in standard examples of chaotic systems; it is a spacetime diffeomorphism invariant theory. Thus many characterizations of chaos do not work. It is therefore necessary to develop a definition of chaos suitable for application to general relativity. This prese... |
1205.0146 | Bibhas Majhi Ranjan | Bibhas Ranjan Majhi, Dibakar Roychowdhury | Phase transition and scaling behavior of topological charged black holes
in Horava-Lifshitz gravity | Minor corrections, refs. added, to appear in Class. Quant. Grav.
arXiv admin note: text overlap with arXiv:1111.0973 by other authors | Class. Quantum Grav. 29: 245012, 2012 | 10.1088/0264-9381/29/24/245012 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/3.0/ | Gravity can be thought as an emergent phenomenon and it has a nice
"thermodynamic" structure. In this context, it is then possible to study the
thermodynamics without knowing the details of the underlying microscopic
degrees of freedom. Here, based on the ordinary thermodynamics, we investigate
the phase transition o... | [
{
"created": "Tue, 1 May 2012 12:00:18 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Nov 2012 10:30:48 GMT",
"version": "v2"
}
] | 2012-11-27 | [
[
"Majhi",
"Bibhas Ranjan",
""
],
[
"Roychowdhury",
"Dibakar",
""
]
] | Gravity can be thought as an emergent phenomenon and it has a nice "thermodynamic" structure. In this context, it is then possible to study the thermodynamics without knowing the details of the underlying microscopic degrees of freedom. Here, based on the ordinary thermodynamics, we investigate the phase transition of ... |
2211.14507 | Yurii Ignat'ev | Yu.G. Ignat'ev | Single-Field Model of Gravitational-Scalar Instability. II. Black Hole
Formation | 8 pages, 9 figures, 10 references | Gravit. Cosmol. 28 (2022) 375-381 | 10.1134/S0202289322040107 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | On the basis of the previously formulated mathematical model of a statistical
system with scalar interaction of fermions and the theory of
gravitational-scalar instability of a cosmological model based on a
one-component statistical system of scalarly charged degenerate fermions (\MIO
models), the possibility of the ... | [
{
"created": "Sat, 26 Nov 2022 07:54:18 GMT",
"version": "v1"
}
] | 2022-11-29 | [
[
"Ignat'ev",
"Yu. G.",
""
]
] | On the basis of the previously formulated mathematical model of a statistical system with scalar interaction of fermions and the theory of gravitational-scalar instability of a cosmological model based on a one-component statistical system of scalarly charged degenerate fermions (\MIO models), the possibility of the fo... |
0904.0215 | Dawood Kothawala | Dawood Kothawala, T. Padmanabhan | Thermodynamic structure of Lanczos-Lovelock field equations from
near-horizon symmetries | RevTeX 4; 10 pages; no figures | Phys.Rev.D79:104020,2009 | 10.1103/PhysRevD.79.104020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that, for a wide class of spacetimes with horizons, Einstein
equations near the horizon can be written as a thermodynamic identity. It is
also known that the Einstein tensor acquires a highly symmetric form near
static, as well as stationary, horizons. We show that, for generic static
spacetimes, thi... | [
{
"created": "Wed, 1 Apr 2009 16:46:18 GMT",
"version": "v1"
}
] | 2009-07-30 | [
[
"Kothawala",
"Dawood",
""
],
[
"Padmanabhan",
"T.",
""
]
] | It is well known that, for a wide class of spacetimes with horizons, Einstein equations near the horizon can be written as a thermodynamic identity. It is also known that the Einstein tensor acquires a highly symmetric form near static, as well as stationary, horizons. We show that, for generic static spacetimes, this ... |
gr-qc/0703093 | Christopher Eling | David Garfinkle, Christopher Eling, Ted Jacobson | Numerical simulations of gravitational collapse in Einstein-aether
theory | 9 pages, 7 figures; v2: corrected typos, added minor clarifying
remarks, improved discussion of results in conclusion | Phys.Rev.D76:024003,2007 | 10.1103/PhysRevD.76.024003 | null | gr-qc astro-ph hep-th | null | We study gravitational collapse of a spherically symmetric scalar field in
Einstein-aether theory (general relativity coupled to a dynamical unit timelike
vector field). The initial value formulation is developed, and numerical
simulations are performed. The collapse produces regular, stationary black
holes, as long ... | [
{
"created": "Sun, 18 Mar 2007 21:03:31 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Jul 2007 18:45:07 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Garfinkle",
"David",
""
],
[
"Eling",
"Christopher",
""
],
[
"Jacobson",
"Ted",
""
]
] | We study gravitational collapse of a spherically symmetric scalar field in Einstein-aether theory (general relativity coupled to a dynamical unit timelike vector field). The initial value formulation is developed, and numerical simulations are performed. The collapse produces regular, stationary black holes, as long as... |
1801.07906 | Mehrab Momennia | Seyed Hossein Hendi, Mehrab Momennia | Thermodynamic description and quasinormal modes of adS black holes in
Born-Infeld massive gravity with a non-abelian hair | 21 pages and 7 figures. Published version | JHEP 10 (2019) 207 | 10.1007/JHEP10(2019)207 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a new class of asymptotically (a)dS black hole solutions of
Einstein-Yang-Mills massive gravity in the presence of Born-Infeld nonlinear
electrodynamics. The obtained solutions possess a Coulomb electric charge,
massive term and a non-abelian hair as well. We calculate the conserved and
thermodynamic qua... | [
{
"created": "Wed, 24 Jan 2018 08:33:06 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jan 2019 09:15:02 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Oct 2019 07:35:20 GMT",
"version": "v3"
}
] | 2022-08-09 | [
[
"Hendi",
"Seyed Hossein",
""
],
[
"Momennia",
"Mehrab",
""
]
] | We construct a new class of asymptotically (a)dS black hole solutions of Einstein-Yang-Mills massive gravity in the presence of Born-Infeld nonlinear electrodynamics. The obtained solutions possess a Coulomb electric charge, massive term and a non-abelian hair as well. We calculate the conserved and thermodynamic quant... |
2112.14133 | Guangzhou Guo | Guangzhou Guo, Peng Wang, Houwen Wu, and Haitang Yang | Quasinormal Modes of Black Holes with Multiple Photon Spheres | 25 pages, 4 figures, 1 table, references added | null | 10.1007/JHEP06(2022)060 | CTP-SCU/2021038 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For a static and spherically symmetric black hole, a photon sphere is
composed of circular null geodesics of fixed radius, and plays an important
role in observing the black hole. Recently, in an Einstein-Maxwell-scalar model
with a non-minimal coupling between the scalar and electromagnetic fields, a
class of hairy ... | [
{
"created": "Tue, 28 Dec 2021 13:22:20 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jan 2022 11:21:00 GMT",
"version": "v2"
}
] | 2022-06-29 | [
[
"Guo",
"Guangzhou",
""
],
[
"Wang",
"Peng",
""
],
[
"Wu",
"Houwen",
""
],
[
"Yang",
"Haitang",
""
]
] | For a static and spherically symmetric black hole, a photon sphere is composed of circular null geodesics of fixed radius, and plays an important role in observing the black hole. Recently, in an Einstein-Maxwell-scalar model with a non-minimal coupling between the scalar and electromagnetic fields, a class of hairy bl... |
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