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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2011.02772 | Elahe Khalouei | E. Khalouei, H. Ghodsi, S. Rahvar and J. Abedi | Possibility of primordial black holes as the source of gravitational
wave events in the advanced LIGO detector | Final published version | Phys. Rev. D 103, 084001 (2021) | 10.1103/PhysRevD.103.084001 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The analysis of gravitational Wave (GW) data from advanced LIGO provides the
mass of each companion of binary black holes as the source of GWs. The mass of
events corresponding to the binary black holes from GW is above $20$ M$_\odot$
which is much larger than the mass of astrophysical black holes detected by
x-ray o... | [
{
"created": "Thu, 5 Nov 2020 11:54:59 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Apr 2021 05:44:28 GMT",
"version": "v2"
}
] | 2021-04-13 | [
[
"Khalouei",
"E.",
""
],
[
"Ghodsi",
"H.",
""
],
[
"Rahvar",
"S.",
""
],
[
"Abedi",
"J.",
""
]
] | The analysis of gravitational Wave (GW) data from advanced LIGO provides the mass of each companion of binary black holes as the source of GWs. The mass of events corresponding to the binary black holes from GW is above $20$ M$_\odot$ which is much larger than the mass of astrophysical black holes detected by x-ray obs... |
1206.3317 | Sergio Ulhoa | S. C. Ulhoa and R. G. G. Amorim | On Non-commutative Corrections of Gravitational Energy in Teleparallel
Gravity | 11 pages, no figures | Journal of Gravity, v. 2013, p. 1-7, 2013 | 10.1155/2013/217813 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we use the theory of Teleparallelism Equivalent to General
Relativity based in non-commutative space-time coordinates. In this context, we
write the corrections of the Schwarzschild solution. As a important result, we
find the corrections of the gravitational energy in the realm of teleparallel
gravity d... | [
{
"created": "Thu, 14 Jun 2012 20:05:00 GMT",
"version": "v1"
}
] | 2013-12-06 | [
[
"Ulhoa",
"S. C.",
""
],
[
"Amorim",
"R. G. G.",
""
]
] | In this work we use the theory of Teleparallelism Equivalent to General Relativity based in non-commutative space-time coordinates. In this context, we write the corrections of the Schwarzschild solution. As a important result, we find the corrections of the gravitational energy in the realm of teleparallel gravity due... |
1309.3090 | Keiichi Akama | Keiichi Akama and Takashi Hattori | Dynamical Foundations of the Brane Induced Gravity | 10 pages, 1 figure | null | 10.1088/0264-9381/30/20/205002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a comprehensive formalism to derive precise expressions for the
induced gravity of the braneworld, assuming the dynamics of the
Dirac-Nambu-Goto type. The quantum fluctuations of the brane at short distances
give rise to divergences, which should be cutoff at the scale of the inverse
thickness of the brane... | [
{
"created": "Thu, 12 Sep 2013 10:11:24 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Akama",
"Keiichi",
""
],
[
"Hattori",
"Takashi",
""
]
] | We present a comprehensive formalism to derive precise expressions for the induced gravity of the braneworld, assuming the dynamics of the Dirac-Nambu-Goto type. The quantum fluctuations of the brane at short distances give rise to divergences, which should be cutoff at the scale of the inverse thickness of the brane. ... |
gr-qc/0306068 | Michael Petri | Michael Petri (Bundesamt fuer Strahlenschutz, Salzgitter, Germany) | Charged holostars | 48 pages, no figures; revised v2: references and typos corrected,
footnote 30 added (on the distinguishability of spin network states), minor
error on page 40 of v1 corrected; v3: slightly expanded section 5.5, slightly
modified discussion in section 9.2 | null | null | null | gr-qc | null | A charged holostar is an exact solution of the Einstein field equations. Its
interior matter distribution rho = 1 / (8 pi r^2) is singularity free with an
overall string equation of state. It has a boundary membrane of tangential
pressure (but no mass-energy) situated roughly a Planck coordinate distance
outside of t... | [
{
"created": "Mon, 16 Jun 2003 14:33:26 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jul 2003 14:10:58 GMT",
"version": "v2"
},
{
"created": "Sun, 2 May 2004 18:53:50 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Petri",
"Michael",
"",
"Bundesamt fuer Strahlenschutz, Salzgitter, Germany"
]
] | A charged holostar is an exact solution of the Einstein field equations. Its interior matter distribution rho = 1 / (8 pi r^2) is singularity free with an overall string equation of state. It has a boundary membrane of tangential pressure (but no mass-energy) situated roughly a Planck coordinate distance outside of the... |
0708.3325 | Sunil Maharaj | S. D. Maharaj and K. Komathiraj | Generalised compact spheres in electric fields | 16 pages, To appear in Class. Quantum Grav | Class.Quant.Grav.24:4513-4524,2007 | 10.1088/0264-9381/24/17/015 | null | gr-qc | null | We present exact solutions to the Einstein-Maxwell system of equations in
spherically symmetric gravitational fields with a specified form of the
electric field intensity. The condition of pressure isotropy yields a
difference equation with variable, rational coefficients. In an earlier
treatment this condition was i... | [
{
"created": "Fri, 24 Aug 2007 12:20:19 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Maharaj",
"S. D.",
""
],
[
"Komathiraj",
"K.",
""
]
] | We present exact solutions to the Einstein-Maxwell system of equations in spherically symmetric gravitational fields with a specified form of the electric field intensity. The condition of pressure isotropy yields a difference equation with variable, rational coefficients. In an earlier treatment this condition was int... |
0805.4259 | Abraham Harte | Abraham I Harte | Approximate spacetime symmetries and conservation laws | 26 pages, 1 figure. Added an example and simplified presentation.
Accepted by Classical and Quantum Gravity | Class.Quant.Grav.25:205008,2008 | 10.1088/0264-9381/25/20/205008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A notion of geometric symmetry is introduced that generalizes the classical
concepts of Killing fields and other affine collineations. There is a sense in
which flows under these new vector fields minimize deformations of the
connection near a specified observer. Any exact affine collineations that may
exist are spec... | [
{
"created": "Wed, 28 May 2008 05:15:10 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Aug 2008 21:19:24 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Harte",
"Abraham I",
""
]
] | A notion of geometric symmetry is introduced that generalizes the classical concepts of Killing fields and other affine collineations. There is a sense in which flows under these new vector fields minimize deformations of the connection near a specified observer. Any exact affine collineations that may exist are specia... |
2205.01799 | Kathryn Zurek | Kathryn M. Zurek | Snowmass 2021 White Paper: Observational Signatures of Quantum Gravity | 16 pages, 3 figures | null | null | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | This short review is intended as a colloquium-level summary, for the Snowmass
2021 process, on recent theoretical results on infrared observables in quantum
gravity. We rely on simple physical arguments, most notably a random walk
intuition, to show how effects of quantum gravity in the ultraviolet (at the
Planck len... | [
{
"created": "Tue, 3 May 2022 22:05:26 GMT",
"version": "v1"
}
] | 2022-05-05 | [
[
"Zurek",
"Kathryn M.",
""
]
] | This short review is intended as a colloquium-level summary, for the Snowmass 2021 process, on recent theoretical results on infrared observables in quantum gravity. We rely on simple physical arguments, most notably a random walk intuition, to show how effects of quantum gravity in the ultraviolet (at the Planck lengt... |
2208.02754 | Naouel Boulkaboul | Naouel Boulkaboul | Interacting Tsallis holographic dark energy in $q$-modified DGP
braneworld | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the cosmological aspects of interacting Tsallis holographic dark
energy (THDE) in a $q$-modified DGP braneworld setup emerging from non-Gaussian
statistical mechanics.To this end, three classes of superstatistics, that is,
log-normal, inverse $\chi^2$ and $\chi^2$ superstatistics were incorporated
into the... | [
{
"created": "Thu, 4 Aug 2022 16:29:17 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Nov 2022 16:19:18 GMT",
"version": "v2"
}
] | 2022-11-15 | [
[
"Boulkaboul",
"Naouel",
""
]
] | We explore the cosmological aspects of interacting Tsallis holographic dark energy (THDE) in a $q$-modified DGP braneworld setup emerging from non-Gaussian statistical mechanics.To this end, three classes of superstatistics, that is, log-normal, inverse $\chi^2$ and $\chi^2$ superstatistics were incorporated into the m... |
1001.3996 | Victor Berezin | Victor Berezin | On Classical Analogs of Quantum Schwarzschild and Reissner-Nordstrom
Black Holes. Solving the "Mystery of log(3)" | Combined and extended version of talks given at the "$th
International Sakharov Conference on Physics", Lebedev Institute, Moscow,
Russia, May 18-23, 2009, Joint workshop "Frontiers in Black Hole Physics in
Dubna", Dubna, Russia, May 25-30, 2009 and "Twelfth Marcel Grossmann Meeting
MG12", Palais d'UNESCO,Paris... | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The model is built in which the main global properties of classical and
quasi-classical black holes become local. These are the event horizon,
"no-hair", temperature and entropy. Our construction is based on the features
of a quantum collapse, discovered while studying some quantum black hole
models. But it is purely... | [
{
"created": "Fri, 22 Jan 2010 14:00:48 GMT",
"version": "v1"
}
] | 2010-01-25 | [
[
"Berezin",
"Victor",
""
]
] | The model is built in which the main global properties of classical and quasi-classical black holes become local. These are the event horizon, "no-hair", temperature and entropy. Our construction is based on the features of a quantum collapse, discovered while studying some quantum black hole models. But it is purely c... |
1610.06025 | Giulio Caciotta | G.Caciotta, F.Nicol\`o | The maximal existence region of the analytic solutions for a class of
characteristic Einstein vacuum equations | Previous version replaced with a new one with few minor corrections | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main goal of this work consists in showing that the analytic solutions
for a class of characteristic problems for the Einstein vacuum equations have
an existence region larger than the one provided by the Cauchy-Kowalevski
theorem, due to the intrinsic hyperbolicity of the Einstein equations. The
magnitude of thi... | [
{
"created": "Wed, 19 Oct 2016 14:17:29 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Nov 2018 22:56:33 GMT",
"version": "v2"
}
] | 2018-11-14 | [
[
"Caciotta",
"G.",
""
],
[
"Nicolò",
"F.",
""
]
] | The main goal of this work consists in showing that the analytic solutions for a class of characteristic problems for the Einstein vacuum equations have an existence region larger than the one provided by the Cauchy-Kowalevski theorem, due to the intrinsic hyperbolicity of the Einstein equations. The magnitude of this ... |
1412.7435 | Daniele Pranzetti | Daniele Pranzetti and Hanno Sahlmann | Horizon entropy with loop quantum gravity methods | 15 pages, 2 figures; published version | Physics Letters B 746 (2015) 209-216 | 10.1016/j.physletb.2015.04.070 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the spherically symmetric isolated horizon can be described in
terms of an SU(2) connection and a su(2) valued one form, obeying certain
constraints. The horizon symplectic structure is precisely the one of 3d
gravity in a first order formulation. We quantize the horizon degrees of
freedom in the framewo... | [
{
"created": "Tue, 23 Dec 2014 16:34:42 GMT",
"version": "v1"
},
{
"created": "Mon, 18 May 2015 11:18:56 GMT",
"version": "v2"
}
] | 2015-05-19 | [
[
"Pranzetti",
"Daniele",
""
],
[
"Sahlmann",
"Hanno",
""
]
] | We show that the spherically symmetric isolated horizon can be described in terms of an SU(2) connection and a su(2) valued one form, obeying certain constraints. The horizon symplectic structure is precisely the one of 3d gravity in a first order formulation. We quantize the horizon degrees of freedom in the framework... |
2004.10480 | Mahmood Khalid Jasim | Saibal Ray, Dibyendu Shee, Debabrata Deb, S.K. Maurya, M.K. Jasim | Charged strange stellar model with Tolman $V$ metric potential in the
Einstein-Maxwell space-time | 8 figures , 2 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper deals with the existence of a compact stellar object, precisely
strange (quark) star, in the framework of Einstein's General Theory of
Relativity with Tolman $V$ metric potential, which is one of the simplest forms
of potential among his proposals. The potential is given by $e^{\nu}=Kr^{2n}$,
where $K$ is ... | [
{
"created": "Wed, 22 Apr 2020 10:32:52 GMT",
"version": "v1"
}
] | 2020-04-23 | [
[
"Ray",
"Saibal",
""
],
[
"Shee",
"Dibyendu",
""
],
[
"Deb",
"Debabrata",
""
],
[
"Maurya",
"S. K.",
""
],
[
"Jasim",
"M. K.",
""
]
] | This paper deals with the existence of a compact stellar object, precisely strange (quark) star, in the framework of Einstein's General Theory of Relativity with Tolman $V$ metric potential, which is one of the simplest forms of potential among his proposals. The potential is given by $e^{\nu}=Kr^{2n}$, where $K$ is th... |
gr-qc/0205003 | Rosenthal Eran | Amos Ori and Eran Rosenthal | Universal Self Force from an Extended-Object Approach | Latex, one postscript figure, 4 pages | Phys.Rev. D68 (2003) 041701 | 10.1103/PhysRevD.68.041701 | null | gr-qc | null | We present a consistent extended-object approach for determining the self
force acting on an accelerating charged particle. In this approach one
considers an extended charged object of finite size $\epsilon $, and calculates
the overall contribution of the mutual electromagnetic forces. Previous
implementations of th... | [
{
"created": "Wed, 1 May 2002 13:24:55 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Ori",
"Amos",
""
],
[
"Rosenthal",
"Eran",
""
]
] | We present a consistent extended-object approach for determining the self force acting on an accelerating charged particle. In this approach one considers an extended charged object of finite size $\epsilon $, and calculates the overall contribution of the mutual electromagnetic forces. Previous implementations of this... |
1901.02784 | Hernando Quevedo | Daniel Flores-Alfonso and Hernando Quevedo | Extended Thermodynamics of Self-Gravitating Skyrmions | Revised version published in CQG | Class. Quant. Grav. 36 (2019) 154001 | 10.1088/1361-6382/ab2c20 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A modification of the hedgehog ansatz has recently led to novel exact black
hole solutions with selfgravitating SU(2) Skyrme fields. Considering a negative
cosmological constant the black holes are not asymptotically anti-de Sitter
(AdS) but rather asymptote to an AdS version of Barriola--Vilenkin spacetime.
We exami... | [
{
"created": "Wed, 9 Jan 2019 15:42:58 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Sep 2019 01:18:13 GMT",
"version": "v2"
}
] | 2019-09-10 | [
[
"Flores-Alfonso",
"Daniel",
""
],
[
"Quevedo",
"Hernando",
""
]
] | A modification of the hedgehog ansatz has recently led to novel exact black hole solutions with selfgravitating SU(2) Skyrme fields. Considering a negative cosmological constant the black holes are not asymptotically anti-de Sitter (AdS) but rather asymptote to an AdS version of Barriola--Vilenkin spacetime. We examine... |
2205.13736 | Baocheng Zhang | Feifan He, Baocheng Zhang | Observable effect of quantized cylindrical gravitational waves | null | Phys. Rev. D 105, 106019 (2022) | 10.1103/PhysRevD.105.106019 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the response of a model gravitational wave detector consisting
of two particles to the quantized cylindrical gravitational waves and obtain a
relation between the standard deviation of the distance between two particles
and the distance from the source to the detector. It is found that the quantum
effe... | [
{
"created": "Fri, 27 May 2022 03:02:01 GMT",
"version": "v1"
}
] | 2022-05-30 | [
[
"He",
"Feifan",
""
],
[
"Zhang",
"Baocheng",
""
]
] | We investigate the response of a model gravitational wave detector consisting of two particles to the quantized cylindrical gravitational waves and obtain a relation between the standard deviation of the distance between two particles and the distance from the source to the detector. It is found that the quantum effect... |
1503.08101 | Dennis Philipp | Dennis Philipp and Volker Perlick | On analytic solutions of wave equations in regular coordinate systems on
Schwarzschild background | 17 pages, 9 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The propagation of (massless) scalar, electromagnetic and gravitational waves
on fixed Schwarzschild background spacetime is described by the general
time-dependent Regge-Wheeler equation. We transform this wave equation to usual
Schwarzschild, Eddington-Finkelstein, Painleve-Gullstrand and Kruskal-Szekeres
coordinat... | [
{
"created": "Fri, 27 Mar 2015 14:56:36 GMT",
"version": "v1"
}
] | 2015-03-30 | [
[
"Philipp",
"Dennis",
""
],
[
"Perlick",
"Volker",
""
]
] | The propagation of (massless) scalar, electromagnetic and gravitational waves on fixed Schwarzschild background spacetime is described by the general time-dependent Regge-Wheeler equation. We transform this wave equation to usual Schwarzschild, Eddington-Finkelstein, Painleve-Gullstrand and Kruskal-Szekeres coordinates... |
gr-qc/0607108 | Tolga Birkandan | T. Birkandan, M. Hortacsu | Examples of Heun and Mathieu functions as solutions of wave equations in
curved spaces | 18 pages, Minor improvements, references added | J.Phys.A40:1105-1116,2007; J.Phys.A40:11203,2007 | 10.1088/1751-8113/40/5/016 10.1088/1751-8121/40/36/C01 | null | gr-qc math-ph math.MP | null | We give examples where the Heun function exists in general relativity. It
turns out that while a wave equation written in the background of certain
metric yields Mathieu functions as its solutions in four space-time dimensions,
the trivial generalization to five dimensions results in the double confluent
Heun functio... | [
{
"created": "Tue, 25 Jul 2006 08:21:04 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Jul 2006 07:24:25 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Jan 2007 08:28:36 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Birkandan",
"T.",
""
],
[
"Hortacsu",
"M.",
""
]
] | We give examples where the Heun function exists in general relativity. It turns out that while a wave equation written in the background of certain metric yields Mathieu functions as its solutions in four space-time dimensions, the trivial generalization to five dimensions results in the double confluent Heun function.... |
1902.03104 | Nasr Ahmed | Nasr Ahmed and Sultan Z. Alamri | A Cyclic Universe With Varying Cosmological Constant in $f(R,T)$ gravity | 15 pages, 10 figures | null | 10.1139/cjp-2018-0635 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new kind of evolution for cyclic models in which the Hubble parameter
oscillates and keeps positive has been explored in a specific $f(R,T)$ gravity
reconstruction. A singularity-free cyclic universe with negative varying
cosmological constant has been obtained which supports the role suggested for
negative $\Lambd... | [
{
"created": "Wed, 6 Feb 2019 14:57:05 GMT",
"version": "v1"
}
] | 2019-02-11 | [
[
"Ahmed",
"Nasr",
""
],
[
"Alamri",
"Sultan Z.",
""
]
] | A new kind of evolution for cyclic models in which the Hubble parameter oscillates and keeps positive has been explored in a specific $f(R,T)$ gravity reconstruction. A singularity-free cyclic universe with negative varying cosmological constant has been obtained which supports the role suggested for negative $\Lambda$... |
1401.5180 | Jia Wang | Xin-he Meng, Wei Xu, and Jia Wang | A Note on Entropy Relations of Black Hole Horizons | 17 pages, no figures, 2 tables, minor corrections, the version
appears in International Journal of Modern Physics A | Int.J.Mod.Phys. A, 29 (2014) 1450088 | 10.1142/S0217751X14500882 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We focus on the entropy relations of black holes in three, four and higher
dimensions. These entropy relations include entropy product, "part" entropy
product and entropy sum. We also discuss their differences and similarities, in
order to make a further study on understanding the origin of black hole entropy
at the ... | [
{
"created": "Tue, 21 Jan 2014 05:26:07 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Jul 2014 14:40:42 GMT",
"version": "v2"
}
] | 2014-07-23 | [
[
"Meng",
"Xin-he",
""
],
[
"Xu",
"Wei",
""
],
[
"Wang",
"Jia",
""
]
] | We focus on the entropy relations of black holes in three, four and higher dimensions. These entropy relations include entropy product, "part" entropy product and entropy sum. We also discuss their differences and similarities, in order to make a further study on understanding the origin of black hole entropy at the mi... |
gr-qc/9506010 | Leonid Grishchuk | L. P. Grishchuk | Comment on the paper of Leonard Parker and Yang Zhang ``Cosmological
perturbations of a relativistic condensate'' | 9 pages REVTEX 3.0 | null | null | WUGRAV-95-12 | gr-qc astro-ph hep-th | null | In a recent paper, Parker and Zhang [1] consider cosmological perturbations
that can be possibly produced in the early Universe. This is an interesting
problem having important observational implications. The paper of Parker and
Zhang is transparent and honest, in the sense that the authors clearly identify
what they... | [
{
"created": "Mon, 5 Jun 1995 20:36:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Grishchuk",
"L. P.",
""
]
] | In a recent paper, Parker and Zhang [1] consider cosmological perturbations that can be possibly produced in the early Universe. This is an interesting problem having important observational implications. The paper of Parker and Zhang is transparent and honest, in the sense that the authors clearly identify what they d... |
1911.11627 | Giorgio Papini | Giorgio Papini | Condensation phenomena in gravity | 7 pages, one table. arXiv admin note: text overlap with
arXiv:1902.09940 | null | 10.1142/S0217732320502508 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravity can play a role in critical phenomena. Topological singularities
induce ground state degeneracy and break the continuum symmetry of the vacuum.
They also generate momenta oscillations about an average momentum and a
positive gravitational susceptibility. Gravitational analogues of the laws of
Curie and Bloch ... | [
{
"created": "Mon, 25 Nov 2019 15:35:39 GMT",
"version": "v1"
}
] | 2020-10-07 | [
[
"Papini",
"Giorgio",
""
]
] | Gravity can play a role in critical phenomena. Topological singularities induce ground state degeneracy and break the continuum symmetry of the vacuum. They also generate momenta oscillations about an average momentum and a positive gravitational susceptibility. Gravitational analogues of the laws of Curie and Bloch ha... |
gr-qc/0610015 | Martin Tajmar | M. Tajmar, F. Plesescu, B. Seifert, K. Marhold | Measurement of Gravitomagnetic and Acceleration Fields Around Rotating
Superconductors | To appear in the proceedings of the STAIF-2007 conference published
by AIP | AIP Conf.Proc.880:1071-1082,2007 | 10.1063/1.2437552 | 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. A
similar fi... | [
{
"created": "Wed, 4 Oct 2006 18:44:09 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Oct 2006 07:24:13 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Oct 2006 16:06:22 GMT",
"version": "v3"
}
] | 2010-11-11 | [
[
"Tajmar",
"M.",
""
],
[
"Plesescu",
"F.",
""
],
[
"Seifert",
"B.",
""
],
[
"Marhold",
"K.",
""
]
] | 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. A similar fiel... |
2110.10962 | Fateme Shojaei Arani | F. Shojaei Arani, M. Bagheri Harouni, B. Lamine, A. Blanchard | Sensing Quantum Nature of Primordial Gravitational Waves Using
Electromagnetic Probes | 14 pages, 4 figures | Phys. Scr. 98 055004 (2023) | 10.1088/1402-4896/acb7ac | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on optical medium analogy, we establish a formalism to describe the
interaction between an electromagnetic (EM) system with gravitational waves
(GWs) background. After a full discussion on the classical treatment of the
EM-GW interaction and finding the EM field mode-functions in the presence of
the magneto-die... | [
{
"created": "Thu, 21 Oct 2021 08:19:52 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Oct 2022 15:48:02 GMT",
"version": "v2"
},
{
"created": "Sat, 31 Dec 2022 12:28:26 GMT",
"version": "v3"
}
] | 2023-11-16 | [
[
"Arani",
"F. Shojaei",
""
],
[
"Harouni",
"M. Bagheri",
""
],
[
"Lamine",
"B.",
""
],
[
"Blanchard",
"A.",
""
]
] | Based on optical medium analogy, we establish a formalism to describe the interaction between an electromagnetic (EM) system with gravitational waves (GWs) background. After a full discussion on the classical treatment of the EM-GW interaction and finding the EM field mode-functions in the presence of the magneto-diele... |
1503.01517 | Hiromi Saida | Atsuhito Fujisawa, Hiromi Saida, Chul-Moon Yoo, Yasusada Nambu | Maximum mass of a barotropic spherical star | 14pages, 3figures. Accepted for Publication in Class.Quant.Grav | Class.Quantum Grav.32, 2015, 215028 (13pp) | 10.1088/0264-9381/32/21/215028 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The ratio of total mass $M$ to surface radius $R$ of spherical perfect fluid
ball has an upper bound, $M/R < B$. Buchdahl obtained $B = 4/9$ under the
assumptions; non-increasing mass density in outward direction, and barotropic
equation of states. Barraco and Hamity decreased the Buchdahl's bound to a
lower value $B... | [
{
"created": "Thu, 5 Mar 2015 02:46:55 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Oct 2015 05:12:11 GMT",
"version": "v2"
}
] | 2016-06-16 | [
[
"Fujisawa",
"Atsuhito",
""
],
[
"Saida",
"Hiromi",
""
],
[
"Yoo",
"Chul-Moon",
""
],
[
"Nambu",
"Yasusada",
""
]
] | The ratio of total mass $M$ to surface radius $R$ of spherical perfect fluid ball has an upper bound, $M/R < B$. Buchdahl obtained $B = 4/9$ under the assumptions; non-increasing mass density in outward direction, and barotropic equation of states. Barraco and Hamity decreased the Buchdahl's bound to a lower value $B =... |
1409.1887 | Thomas W. Baumgarte | Kenneth A. Dennison, Thomas W. Baumgarte and Pedro J. Montero | Trumpet Slices in Kerr Spacetimes | 5 pages, 2 figures; version published in PRL | Phys. Rev. Lett. 113, 261101 (2014) | 10.1103/PhysRevLett.113.261101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a new time-independent family of analytical coordinate systems
for the Kerr spacetime representing rotating black holes. We also propose a
(2+1)+1 formalism for the characterization of trumpet geometries. Applying this
formalism to our new family of coordinate systems we identify, for the first
time, ana... | [
{
"created": "Fri, 5 Sep 2014 17:40:40 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Mar 2015 20:50:56 GMT",
"version": "v2"
}
] | 2015-03-04 | [
[
"Dennison",
"Kenneth A.",
""
],
[
"Baumgarte",
"Thomas W.",
""
],
[
"Montero",
"Pedro J.",
""
]
] | We introduce a new time-independent family of analytical coordinate systems for the Kerr spacetime representing rotating black holes. We also propose a (2+1)+1 formalism for the characterization of trumpet geometries. Applying this formalism to our new family of coordinate systems we identify, for the first time, analy... |
gr-qc/0110115 | Lorenzo Iorio | Lorenzo Iorio | A Gravitomagnetic Effect on the Orbit of a Test Body due to the Earth's
Variable Angular Momentum | LaTex2e, 1 table, no figures, 7 pages | Int.J.Mod.Phys. D11 (2002) 781-787 | 10.1142/S0218271802002086 | null | gr-qc astro-ph | null | The well known general relativistic Lense-Thirring drag of the orbit of a
test particle in the stationary field of a central slowly rotating body is
generated, in the weak-field and slow-motion approximation of General
Relativity, by a gravitomagnetic Lorentz-like acceleration in the equations of
motion of the test p... | [
{
"created": "Fri, 26 Oct 2001 13:58:13 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Oct 2001 22:10:43 GMT",
"version": "v2"
},
{
"created": "Tue, 30 Oct 2001 22:40:00 GMT",
"version": "v3"
},
{
"created": "Tue, 6 Nov 2001 14:19:13 GMT",
"version": "v4"
},
{
"cr... | 2007-05-23 | [
[
"Iorio",
"Lorenzo",
""
]
] | The well known general relativistic Lense-Thirring drag of the orbit of a test particle in the stationary field of a central slowly rotating body is generated, in the weak-field and slow-motion approximation of General Relativity, by a gravitomagnetic Lorentz-like acceleration in the equations of motion of the test par... |
gr-qc/0106014 | Robert T. Jantzen | Donato Bini, Paolo Carini and Robert T Jantzen | The intrinsic derivative and centrifugal forces in general relativity:
II. Applications to circular orbits in some familiar stationary axisymmetric
spacetimes | 59 pages latex 2.09, uses ijmpd.sty macros, pictex, epsf.sty for 10
eps figures; typographical corrections made compared to published version | Int.J.Mod.Phys.D6:143-198,1997 | 10.1142/S021827189700011X | null | gr-qc | null | The tools developed in a preceding article for interpreting spacetime
geometry in terms of all possible space-plus-time splitting approaches are
applied to circular orbits in some familiar stationary axisymmetric spacetimes.
This helps give a more intuitive picture of their rotational features including
spin precessi... | [
{
"created": "Tue, 5 Jun 2001 18:18:54 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Bini",
"Donato",
""
],
[
"Carini",
"Paolo",
""
],
[
"Jantzen",
"Robert T",
""
]
] | The tools developed in a preceding article for interpreting spacetime geometry in terms of all possible space-plus-time splitting approaches are applied to circular orbits in some familiar stationary axisymmetric spacetimes. This helps give a more intuitive picture of their rotational features including spin precession... |
gr-qc/0108065 | Pantelis S. Apostolopoulos | Pantelis S. Apostolopoulos and Michael Tsamparlis | Hypersurface homogeneous locally rotationally symmetric spacetimes
admitting conformal symmetries | 15 pages; to appear in Classical Quantum Gravity; some misprints in
Tables 3,5 and in section 4 corrected | Class.Quant.Grav. 18 (2001) 3775-3790 | 10.1088/0264-9381/18/18/301 | null | gr-qc | null | All hypersurface homogeneous locally rotationally symmetric spacetimes which
admit conformal symmetries are determined and the symmetry vectors are given
explicitly. It is shown that these spacetimes must be considered in two sets.
One set containing Ellis Class II and the other containing Ellis Class I, III
LRS spac... | [
{
"created": "Sat, 25 Aug 2001 15:13:17 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Jun 2003 07:34:22 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Apostolopoulos",
"Pantelis S.",
""
],
[
"Tsamparlis",
"Michael",
""
]
] | All hypersurface homogeneous locally rotationally symmetric spacetimes which admit conformal symmetries are determined and the symmetry vectors are given explicitly. It is shown that these spacetimes must be considered in two sets. One set containing Ellis Class II and the other containing Ellis Class I, III LRS spacet... |
2006.09021 | Bin Wu | Bin Wu, Chao Wang, Zhen-Ming Xu, Wen-Li Yang | Ruppeiner geometry and thermodynamic phase transition of the black hole
in massive gravity | 28 pages,7 figures; v2:minor changes, references added, match the
published version | Eur. Phys. J. C 81, 626 (2021) | 10.1140/epjc/s10052-021-09407-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The phase transition and thermodynamic geometry of a 4-dimensional AdS
topological charged black hole in de Rham, Gabadadze and Tolley (dRGT) massive
gravity have been studied. After introducing a normalized thermodynamic scalar
curvature, it is speculated that its value is related to the interaction
between the unde... | [
{
"created": "Tue, 16 Jun 2020 09:41:17 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Aug 2021 07:27:26 GMT",
"version": "v2"
}
] | 2021-08-31 | [
[
"Wu",
"Bin",
""
],
[
"Wang",
"Chao",
""
],
[
"Xu",
"Zhen-Ming",
""
],
[
"Yang",
"Wen-Li",
""
]
] | The phase transition and thermodynamic geometry of a 4-dimensional AdS topological charged black hole in de Rham, Gabadadze and Tolley (dRGT) massive gravity have been studied. After introducing a normalized thermodynamic scalar curvature, it is speculated that its value is related to the interaction between the underl... |
0911.4852 | Tatyana P. Shestakova | T. P. Shestakova | The formulation of General Relativity in extended phase space as a way
to its quantization | 4 pages, talk presented at the XII Marcel Grossmann Meeting, Paris,
France, July 2009, an equation corrected | Proceedings of the Twelfth Marcel Grossmann Meeting on General
Relativity (Paris, France, 2009), eds. by T. Damour, R. T Jantzen and R.
Ruffini, World Scientific, Singapore, 2012, P. 1462-1464 | 10.1142/9789814374552_0247 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Our attempts to find an explanation for quantum behavior of the Early
Universe appeal, as a rule, to the Wheeler - DeWitt Quantum Geometrodynamics
which relies upon Hamiltonian formulation of General Relativity proposed by
Arnowitt, Deser and Misner (ADM). In spite of the fact that the basic ideas of
this approach we... | [
{
"created": "Wed, 25 Nov 2009 13:52:13 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Nov 2009 11:00:17 GMT",
"version": "v2"
}
] | 2013-02-21 | [
[
"Shestakova",
"T. P.",
""
]
] | Our attempts to find an explanation for quantum behavior of the Early Universe appeal, as a rule, to the Wheeler - DeWitt Quantum Geometrodynamics which relies upon Hamiltonian formulation of General Relativity proposed by Arnowitt, Deser and Misner (ADM). In spite of the fact that the basic ideas of this approach were... |
0711.0255 | Tao Mei | T. Mei | On spherically symmetric metric satisfying the positive kinetic energy
coordinate condition | 11 pages, no figure | null | null | null | gr-qc | null | Generally speaking, there is a negative kinetic energy term in the Lagrangian
of the Einstein-Hilbert action of general relativity; On the other hand, the
negative kinetic energy term can be vanished by designating a special
coordinate system. For general spherically symmetric metric, the question that
seeking specia... | [
{
"created": "Fri, 2 Nov 2007 07:38:40 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Nov 2007 06:20:36 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Nov 2007 18:58:49 GMT",
"version": "v3"
},
{
"created": "Sat, 17 Nov 2007 13:03:13 GMT",
"version": "v4"
},
{
"cr... | 2008-02-28 | [
[
"Mei",
"T.",
""
]
] | Generally speaking, there is a negative kinetic energy term in the Lagrangian of the Einstein-Hilbert action of general relativity; On the other hand, the negative kinetic energy term can be vanished by designating a special coordinate system. For general spherically symmetric metric, the question that seeking special ... |
1304.4359 | Christodoulakis Theodosios | T. Christodoulakis, N. Dimakis and Petros A. Terzis | Lie - point and variational symmetries in minisuperspace Einstein's
gravity | Latex source file 20 pages, no figures | null | 10.1088/1751-8113/47/9/095202 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the application of the theory of symmetries of coupled ordinary
differential equations to the case of reparametrisation invariant Lagrangians
quadratic in the velocities; such Lagrangians encompass all minisuperspace
models. We find that, in order to acquire the maximum number of symmetry
generators, one ... | [
{
"created": "Tue, 16 Apr 2013 08:24:54 GMT",
"version": "v1"
}
] | 2014-03-05 | [
[
"Christodoulakis",
"T.",
""
],
[
"Dimakis",
"N.",
""
],
[
"Terzis",
"Petros A.",
""
]
] | We consider the application of the theory of symmetries of coupled ordinary differential equations to the case of reparametrisation invariant Lagrangians quadratic in the velocities; such Lagrangians encompass all minisuperspace models. We find that, in order to acquire the maximum number of symmetry generators, one mu... |
2206.11875 | Sumit Dey | Sumit Dey and Bibhas Ranjan Majhi | Possible fluid interpretation and tidal force equation on a generic null
hypersurface in Einstein-Cartan theory | Published in Phys. Rev. D | null | 10.1103/PhysRevD.106.104005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamical evolution of the Hajicek $1$-form is derived in Einstein-Cartan
(EC) theory. We find that like Einstein theory of gravity, the evolution
equation is related to a projected part of the Einstein tensor $(\hat{G}_{ab})$
on a generic null surface $\mathcal{H}$, particularly $\hat{G}_{ab}l^a
q^b_{~c}$, where... | [
{
"created": "Thu, 23 Jun 2022 17:27:44 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Nov 2022 11:50:04 GMT",
"version": "v2"
}
] | 2022-11-22 | [
[
"Dey",
"Sumit",
""
],
[
"Majhi",
"Bibhas Ranjan",
""
]
] | The dynamical evolution of the Hajicek $1$-form is derived in Einstein-Cartan (EC) theory. We find that like Einstein theory of gravity, the evolution equation is related to a projected part of the Einstein tensor $(\hat{G}_{ab})$ on a generic null surface $\mathcal{H}$, particularly $\hat{G}_{ab}l^a q^b_{~c}$, where $... |
1709.00234 | Luis Ak\'e Hau | L. Ak\'e Hau, J.L. Flores and J. Herrera | Causality and c-completion of multiwarped spacetimes | 37 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper a systematic study of the causal structure and global causality
properties of multiwarped spacetimes is developed. This analysis is used to
make a detailed description of the causal boundary of these spacetimes. Some
applications of our results in examples of physical interest, for instance, in
the cont... | [
{
"created": "Fri, 1 Sep 2017 10:31:55 GMT",
"version": "v1"
}
] | 2017-09-04 | [
[
"Hau",
"L. Aké",
""
],
[
"Flores",
"J. L.",
""
],
[
"Herrera",
"J.",
""
]
] | In this paper a systematic study of the causal structure and global causality properties of multiwarped spacetimes is developed. This analysis is used to make a detailed description of the causal boundary of these spacetimes. Some applications of our results in examples of physical interest, for instance, in the contex... |
gr-qc/0507060 | Yasuo Ezawa | Y.Ezawa, H.Iwasaki, Y.Ohkuwa, S.Watanabe, N.Yamada and T.Yano | A canonical formalism of f(T)-type gravity in terms of Lie derivatives | 11 pages, no figure | Class.Quant.Grav.23:3205-3214,2006 | 10.1088/0264-9381/23/9/028 | null | gr-qc | null | A canonical formalism of f(R)-type gravity is proposed, resolving the problem
in the formalism of Buchbinder and Lyakhovich(BL). The new coordinates
corresponding to the time derivatives of the metric are taken to be its Lie
derivatives which is the same as in BL. The momenta canonically conjugate to
them and Hamilto... | [
{
"created": "Thu, 14 Jul 2005 08:43:28 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Aug 2005 08:50:24 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Ezawa",
"Y.",
""
],
[
"Iwasaki",
"H.",
""
],
[
"Ohkuwa",
"Y.",
""
],
[
"Watanabe",
"S.",
""
],
[
"Yamada",
"N.",
""
],
[
"Yano",
"T.",
""
]
] | A canonical formalism of f(R)-type gravity is proposed, resolving the problem in the formalism of Buchbinder and Lyakhovich(BL). The new coordinates corresponding to the time derivatives of the metric are taken to be its Lie derivatives which is the same as in BL. The momenta canonically conjugate to them and Hamiltoni... |
1901.05472 | Manuel Hohmann | Manuel Hohmann, Laur J\"arv, Martin Kr\v{s}\v{s}\'ak, Christian
Pfeifer | Modified teleparallel theories of gravity in symmetric spacetimes | 27 pages, no figures; final version accepted by Physical Review D | Phys. Rev. D 100, 084002 (2019) | 10.1103/PhysRevD.100.084002 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Teleparallel gravity theories employ a tetrad and a Lorentz spin connection
as independent variables in their covariant formulation. In order to solve
their field equations, it is helpful to search for solutions which exhibit
certain amounts of symmetry, such as spherical or cosmological symmetry. In
this article we ... | [
{
"created": "Wed, 16 Jan 2019 19:00:07 GMT",
"version": "v1"
},
{
"created": "Thu, 30 May 2019 06:43:23 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Oct 2019 17:31:27 GMT",
"version": "v3"
}
] | 2019-10-09 | [
[
"Hohmann",
"Manuel",
""
],
[
"Järv",
"Laur",
""
],
[
"Krššák",
"Martin",
""
],
[
"Pfeifer",
"Christian",
""
]
] | Teleparallel gravity theories employ a tetrad and a Lorentz spin connection as independent variables in their covariant formulation. In order to solve their field equations, it is helpful to search for solutions which exhibit certain amounts of symmetry, such as spherical or cosmological symmetry. In this article we pr... |
gr-qc/0703119 | Sophie Pireaux Dr | S. Pireaux (Observatoire de la Cote d'Azur, Department ARTEMIS,
Grasse, France) | Time scales in LISA | 14 pages, 5 eps figures, 0 table, accepted in Classical and Quantum
Gravity | Class.Quant.Grav.24:2271-2281,2007 | 10.1088/0264-9381/24/9/008 | null | gr-qc | null | The LISA mission is a space interferometer aiming at the detection of
gravitational waves in the [$10^{-4}$,$10^{-1}$] Hz frequency band. In order to
reach the gravitational wave detection level, a Time Delay Interferometry (TDI)
method must be applied to get rid of (most of) the laser frequency noise and
optical ben... | [
{
"created": "Fri, 23 Mar 2007 15:06:00 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Pireaux",
"S.",
"",
"Observatoire de la Cote d'Azur, Department ARTEMIS,\n Grasse, France"
]
] | The LISA mission is a space interferometer aiming at the detection of gravitational waves in the [$10^{-4}$,$10^{-1}$] Hz frequency band. In order to reach the gravitational wave detection level, a Time Delay Interferometry (TDI) method must be applied to get rid of (most of) the laser frequency noise and optical bench... |
1202.5370 | Sayan Kar | Anirvan DasGupta (IIT Kharagpur, India), Hemwati Nandan (GKV,
Haridwar, India) and Sayan Kar (IIT Kharagpur, India) | Geodesic flows in rotating black hole backgrounds | Sixteen pages, five figures | Phys. Rev. D 85, 104037 (2012) | 10.1103/PhysRevD.85.104037 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the kinematics of timelike geodesic congruences, in the spacetime
geometry of rotating black holes in three (the BTZ) and four (the Kerr)
dimensions. The evolution (Raychaudhuri) equations for the expansion, shear and
rotation along geodesic flows in such spacetimes are obtained. For the BTZ
case, the equati... | [
{
"created": "Fri, 24 Feb 2012 03:38:25 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Jun 2012 09:49:46 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"DasGupta",
"Anirvan",
"",
"IIT Kharagpur, India"
],
[
"Nandan",
"Hemwati",
"",
"GKV,\n Haridwar, India"
],
[
"Kar",
"Sayan",
"",
"IIT Kharagpur, India"
]
] | We study the kinematics of timelike geodesic congruences, in the spacetime geometry of rotating black holes in three (the BTZ) and four (the Kerr) dimensions. The evolution (Raychaudhuri) equations for the expansion, shear and rotation along geodesic flows in such spacetimes are obtained. For the BTZ case, the equation... |
1806.02547 | Eva Hackmann | Eva Hackmann and Arnab Dhani | The propagation delay in the timing of a pulsar orbiting a supermassive
black hole | 13 pages, 5 figures; preprint of the journal version; GRG editor's
choice publication | Gen.Rel.Grav. 51 (2019) no.3, 37 | 10.1007/s10714-019-2517-2 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The observation of a pulsar closely orbiting the galactic center supermassive
black hole would open the window for an accurate determination of the black
hole parameters and for new tests of General Relativity. An important
relativistic effect which has to be taken into account in the timing model is
the propagation ... | [
{
"created": "Thu, 7 Jun 2018 07:37:55 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Nov 2018 14:14:04 GMT",
"version": "v2"
},
{
"created": "Tue, 12 Mar 2019 10:46:49 GMT",
"version": "v3"
}
] | 2019-03-13 | [
[
"Hackmann",
"Eva",
""
],
[
"Dhani",
"Arnab",
""
]
] | The observation of a pulsar closely orbiting the galactic center supermassive black hole would open the window for an accurate determination of the black hole parameters and for new tests of General Relativity. An important relativistic effect which has to be taken into account in the timing model is the propagation de... |
2005.04115 | Emmanuil Saridakis | Emmanuel N. Saridakis | Barrow holographic dark energy | 5 pages, 2 figures, version published in Phys.Rev.D | Phys. Rev. D 102, 123525 (2020) | 10.1103/PhysRevD.102.123525 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We formulate Barrow holographic dark energy, by applying the usual
holographic principle at a cosmological framework, but using the Barrow entropy
instead of the standard Bekenstein-Hawking one. The former is an extended
black-hole entropy that arises due to quantum-gravitational effects which
deform the black-hole s... | [
{
"created": "Fri, 8 May 2020 15:40:54 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jun 2020 16:24:18 GMT",
"version": "v2"
},
{
"created": "Wed, 16 Dec 2020 13:39:14 GMT",
"version": "v3"
}
] | 2021-01-04 | [
[
"Saridakis",
"Emmanuel N.",
""
]
] | We formulate Barrow holographic dark energy, by applying the usual holographic principle at a cosmological framework, but using the Barrow entropy instead of the standard Bekenstein-Hawking one. The former is an extended black-hole entropy that arises due to quantum-gravitational effects which deform the black-hole sur... |
2104.14829 | Karl Wette | Karl Wette | Geometric Approach to Analytic Marginalisation of the Likelihood Ratio
for Continuous Gravitational Wave Searches | 15 pages, 7 figures; accepted for publication in Universe special
issue "Continuous Gravitational Waves" | Universe 2021, 7(6), 174 | 10.3390/universe7060174 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The likelihood ratio for a continuous gravitational wave signal is viewed
geometrically as a function of the orientation of two vectors; one representing
the optimal signal-to-noise ratio, the other representing the maximised
likelihood ratio or $\mathcal{F}$-statistic. Analytic marginalisation over the
angle between... | [
{
"created": "Fri, 30 Apr 2021 08:22:30 GMT",
"version": "v1"
},
{
"created": "Mon, 31 May 2021 02:58:32 GMT",
"version": "v2"
}
] | 2021-06-02 | [
[
"Wette",
"Karl",
""
]
] | The likelihood ratio for a continuous gravitational wave signal is viewed geometrically as a function of the orientation of two vectors; one representing the optimal signal-to-noise ratio, the other representing the maximised likelihood ratio or $\mathcal{F}$-statistic. Analytic marginalisation over the angle between t... |
gr-qc/0111074 | Hiroyuki Nakano | Yasushi Mino, Hiroyuki Nakano, and Misao Sasaki | Covariant Self-force Regularization of a Particle Orbiting a
Schwarzschild Black Hole - Mode Decomposition Regularization - | 18 pages, no figure | Prog.Theor.Phys.108:1039-1064,2003 | 10.1143/PTP.108.1039 | null | gr-qc astro-ph | null | Covariant structure of the self-force of a particle in a general curved
background has been made clear in the cases of scalar [Quinn], electromagnetic
[DeWittBrehme], and gravitational charges [QuinnWald]. Namely, what we need is
the part of the self-field that is non-vanishing off and within the past
light-cone of p... | [
{
"created": "Wed, 21 Nov 2001 23:51:46 GMT",
"version": "v1"
}
] | 2009-10-09 | [
[
"Mino",
"Yasushi",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Sasaki",
"Misao",
""
]
] | Covariant structure of the self-force of a particle in a general curved background has been made clear in the cases of scalar [Quinn], electromagnetic [DeWittBrehme], and gravitational charges [QuinnWald]. Namely, what we need is the part of the self-field that is non-vanishing off and within the past light-cone of par... |
0807.1840 | Miodrag Krmar | Vladan pankovic, Rade Glavatovic, Simo Ciganovic, Dusan Harper
Petkovic, Lovro Loka Martinovic | Single Horizon Black Hole "Laser" and a Solution of the Information Loss
Paradox | 15 pages, no figures | null | null | Ph-NS-23/08 | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we show that single horizon black hole behaves as a "laser". It
is in many aspects conceptually analogous to Corley and Jacobson work on the
two horizon black hole "laser". We started by proposition that circumference of
the black hole horizon holds the natural (integer) quantum number of
corresponding r... | [
{
"created": "Fri, 11 Jul 2008 12:58:29 GMT",
"version": "v1"
}
] | 2008-07-14 | [
[
"pankovic",
"Vladan",
""
],
[
"Glavatovic",
"Rade",
""
],
[
"Ciganovic",
"Simo",
""
],
[
"Petkovic",
"Dusan Harper",
""
],
[
"Martinovic",
"Lovro Loka",
""
]
] | In this work we show that single horizon black hole behaves as a "laser". It is in many aspects conceptually analogous to Corley and Jacobson work on the two horizon black hole "laser". We started by proposition that circumference of the black hole horizon holds the natural (integer) quantum number of corresponding red... |
2107.05603 | Piotr T. Chru\'sciel | Piotr T. Chru\'sciel, Gregory J. Galloway | Positive mass theorems for asymptotically hyperbolic Riemannian
manifolds with boundary | 7 pages, 2 figures | null | 10.1088/1361-6382/ac1fd1 | Preprint UWThPh 2021-9 | gr-qc hep-th math.DG | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We prove positive mass theorems for asymptotically hyperbolic and
asymptotically locally hyperbolic Riemannian manifolds with black-hole-type
boundaries.
| [
{
"created": "Mon, 12 Jul 2021 17:37:42 GMT",
"version": "v1"
}
] | 2021-12-08 | [
[
"Chruściel",
"Piotr T.",
""
],
[
"Galloway",
"Gregory J.",
""
]
] | We prove positive mass theorems for asymptotically hyperbolic and asymptotically locally hyperbolic Riemannian manifolds with black-hole-type boundaries. |
gr-qc/0408009 | Ralf Schutzhold | William G. Unruh and Ralf Sch\"utzhold | On the Universality of the Hawking Effect | 11 pages RevTeX, 6 figures | Phys.Rev. D71 (2005) 024028 | 10.1103/PhysRevD.71.024028 | null | gr-qc | null | Addressing the question of whether the Hawking effect depends on degrees of
freedom at ultra-high (e.g., Planckian) energies/momenta, we propose three
rather general conditions on these degrees of freedom under which the Hawking
effect is reproduced to lowest order. As a generalization of Corley's results,
we present... | [
{
"created": "Tue, 3 Aug 2004 11:51:57 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Dec 2004 12:53:53 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Unruh",
"William G.",
""
],
[
"Schützhold",
"Ralf",
""
]
] | Addressing the question of whether the Hawking effect depends on degrees of freedom at ultra-high (e.g., Planckian) energies/momenta, we propose three rather general conditions on these degrees of freedom under which the Hawking effect is reproduced to lowest order. As a generalization of Corley's results, we present a... |
0807.1854 | Joao Magueijo | Joao Magueijo | DSR as an explanation of cosmological structure | null | null | 10.1088/0264-9381/25/20/202002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Deformed special relativity (DSR) is one of the possible realizations of a
varying speed of light (VSL). It deforms the usual quadratic dispersion
relations so that the speed of light becomes energy dependent, with preferred
frames avoided by postulating a non-linear representation of the Lorentz group.
The theory ma... | [
{
"created": "Fri, 11 Jul 2008 13:33:54 GMT",
"version": "v1"
}
] | 2015-05-13 | [
[
"Magueijo",
"Joao",
""
]
] | Deformed special relativity (DSR) is one of the possible realizations of a varying speed of light (VSL). It deforms the usual quadratic dispersion relations so that the speed of light becomes energy dependent, with preferred frames avoided by postulating a non-linear representation of the Lorentz group. The theory may ... |
1705.09421 | Neil J. Cornish | Travis Robson and Neil Cornish | Global analysis for the LISA gravitational wave observatory | 24 pages, 10 figures | Class.Quant.Grav. 34 (2017) no.24, 244002 | 10.1088/1361-6382/aa9601 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Laser Interferometer Space Antenna (LISA) will explore the source-rich
milli-Hertz band of the gravitational wave spectrum. In contrast to ground
based detectors, where typical signals are short-lived and discrete, LISA
signals are typically long-lived and over-lapping, thus requiring a global data
analysis solut... | [
{
"created": "Fri, 26 May 2017 03:18:14 GMT",
"version": "v1"
}
] | 2018-08-09 | [
[
"Robson",
"Travis",
""
],
[
"Cornish",
"Neil",
""
]
] | The Laser Interferometer Space Antenna (LISA) will explore the source-rich milli-Hertz band of the gravitational wave spectrum. In contrast to ground based detectors, where typical signals are short-lived and discrete, LISA signals are typically long-lived and over-lapping, thus requiring a global data analysis solutio... |
1704.07586 | Edgar Gasperin | Edgar Gasperin, Jarrod L. Williams | The conformal Killing spinor initial data equations | 27 pages, main result changed | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain necessary and sufficient conditions for an initial data set for the
vacuum conformal Einstein field equations to give rise to a spacetime
development in possession of a Killing spinor. The fact that the conformal
Einstein field equations are used in our derivation allows for the possibility
of the initial h... | [
{
"created": "Tue, 25 Apr 2017 08:39:50 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Apr 2022 23:41:49 GMT",
"version": "v2"
}
] | 2022-04-12 | [
[
"Gasperin",
"Edgar",
""
],
[
"Williams",
"Jarrod L.",
""
]
] | We obtain necessary and sufficient conditions for an initial data set for the vacuum conformal Einstein field equations to give rise to a spacetime development in possession of a Killing spinor. The fact that the conformal Einstein field equations are used in our derivation allows for the possibility of the initial hyp... |
1811.03551 | Bjoern S. Schmekel | Bjoern S. Schmekel | Quasi-Local Energy of a Charged Rotating Object Described by the
Kerr-Newman Metric | 11 pages, 9 figures | Phys. Rev. D 100, 124011 (2019) | 10.1103/PhysRevD.100.124011 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Brown-York quasi-local energy of a charged rotating black hole described
by the Kerr-Newman metric and enclosed by a fixed-radius surface is computed.
No further assumptions on the angular momentum or the radial coordinate in
Boyer-Lindquist coordinates were made. The result can be expressed in terms of
incomplet... | [
{
"created": "Thu, 8 Nov 2018 17:06:03 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Aug 2019 07:10:43 GMT",
"version": "v2"
},
{
"created": "Sun, 29 Dec 2019 20:10:01 GMT",
"version": "v3"
}
] | 2020-01-01 | [
[
"Schmekel",
"Bjoern S.",
""
]
] | The Brown-York quasi-local energy of a charged rotating black hole described by the Kerr-Newman metric and enclosed by a fixed-radius surface is computed. No further assumptions on the angular momentum or the radial coordinate in Boyer-Lindquist coordinates were made. The result can be expressed in terms of incomplete ... |
1712.01801 | Katharina Radermacher | Katharina Radermacher | On the Cosmic No-Hair Conjecture in T2-symmetric non-linear scalar field
spacetimes | 32 pages | null | null | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider spacetimes solving the Einstein non-linear scalar field equations
with T2-symmetry and show that they admit an areal time foliation in the
expanding direction. In particular, we prove global existence and uniqueness of
solutions to the corresponding system of evolution equations for all future
times. The ... | [
{
"created": "Tue, 5 Dec 2017 18:28:43 GMT",
"version": "v1"
}
] | 2017-12-06 | [
[
"Radermacher",
"Katharina",
""
]
] | We consider spacetimes solving the Einstein non-linear scalar field equations with T2-symmetry and show that they admit an areal time foliation in the expanding direction. In particular, we prove global existence and uniqueness of solutions to the corresponding system of evolution equations for all future times. The on... |
2211.04440 | Marcin Kisielowski PhD | Marcin Kisielowski | Bouncing Universe in Loop Quantum Gravity: full theory calculation | 44 pages, 8 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Loop Quantum Gravity mathematically rigorous models of full quantum
gravity were proposed. In this paper we study a cosmological sector of one of
the models describing quantum gravity with positive cosmological constant
coupled to massless scalar field. In our previous research we introduced a
method to reduce the... | [
{
"created": "Tue, 8 Nov 2022 18:34:17 GMT",
"version": "v1"
}
] | 2022-11-09 | [
[
"Kisielowski",
"Marcin",
""
]
] | In Loop Quantum Gravity mathematically rigorous models of full quantum gravity were proposed. In this paper we study a cosmological sector of one of the models describing quantum gravity with positive cosmological constant coupled to massless scalar field. In our previous research we introduced a method to reduce the m... |
2208.08129 | Donato Bini | Pablo G. Tello, Donato Bini, Stuart Kauffman, Sauro Succi | Predicting today's cosmological constant via the Zel'dovich-Holographic
connection | 4 pages, 0 figures | null | 10.1209/0295-5075/acae01 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This Letter proposes a solution of the Vacuum Energy and the Cosmological
Constant (CC) paradox based on the Zel'dovich's ansatz, which states that the
observable contribution to the vacuum energy density is given by the
gravitational energy of virtual particle-antiparticle pairs, continually
generated and annihilate... | [
{
"created": "Wed, 17 Aug 2022 07:55:07 GMT",
"version": "v1"
}
] | 2023-01-18 | [
[
"Tello",
"Pablo G.",
""
],
[
"Bini",
"Donato",
""
],
[
"Kauffman",
"Stuart",
""
],
[
"Succi",
"Sauro",
""
]
] | This Letter proposes a solution of the Vacuum Energy and the Cosmological Constant (CC) paradox based on the Zel'dovich's ansatz, which states that the observable contribution to the vacuum energy density is given by the gravitational energy of virtual particle-antiparticle pairs, continually generated and annihilated ... |
1305.2934 | Neil J. Cornish | Neil J.Cornish, Joseph D. Romano | Towards a unified treatment of gravitational-wave data analysis | 4 pages, no figures, published version | null | 10.1103/PhysRevD.87.122003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a unified description of gravitational-wave data analysis that
unites the template-based analysis used to detect deterministic signals from
well-modeled sources, such as binary-black-hole mergers, with the
cross-correlation analysis used to detect stochastic gravitational-wave
backgrounds. We also discuss ... | [
{
"created": "Mon, 13 May 2013 20:01:55 GMT",
"version": "v1"
},
{
"created": "Wed, 29 May 2013 16:37:44 GMT",
"version": "v2"
}
] | 2015-06-15 | [
[
"Cornish",
"Neil J.",
""
],
[
"Romano",
"Joseph D.",
""
]
] | We present a unified description of gravitational-wave data analysis that unites the template-based analysis used to detect deterministic signals from well-modeled sources, such as binary-black-hole mergers, with the cross-correlation analysis used to detect stochastic gravitational-wave backgrounds. We also discuss th... |
gr-qc/0408086 | Owen Patashnick | Owen Patashnick | Energy-Momentum of a regular MMaS-class black hole | 16 pages, 3 figures, LaTex2e; made minor corrections (in content and
in references) at the behest of two anonymous referees. Paper to appear in
IJMPD | Int.J.Mod.Phys.D14:1607-1620,2005 | 10.1142/S0218271805007413 | null | gr-qc hep-th | null | We compute the energy and momentum of a regular black hole of type defined by
Mars, Martin-Prats, and Senovilla using the Einstein and Papapetrou definitions
for energy-momentum density. Some other definitions of energy-momentum density
are shown to give mutually contradictory and less reasonable results. Results
sup... | [
{
"created": "Thu, 26 Aug 2004 00:24:56 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Jun 2005 01:48:10 GMT",
"version": "v2"
}
] | 2010-03-17 | [
[
"Patashnick",
"Owen",
""
]
] | We compute the energy and momentum of a regular black hole of type defined by Mars, Martin-Prats, and Senovilla using the Einstein and Papapetrou definitions for energy-momentum density. Some other definitions of energy-momentum density are shown to give mutually contradictory and less reasonable results. Results suppo... |
1603.01964 | Sumanta Chakraborty | Kinjalk Lochan, Sumanta Chakraborty and T. Padmanabhan | Unruh effect for inertial observers through vacuum correlations | v4; 17 pages, 10 figures; Several clarifications added; To appear in
EPJC | Eur. Phys. J. C 78 433 (2018) | 10.1140/epjc/s10052-018-5911-0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a dynamic version of the Unruh effect in a two dimensional collapse
model forming a black hole. In this two-dimensional collapse model a scalar
field coupled to the dilaton gravity, moving leftwards, collapses to form a
black hole. There are two sets of asymptotic ($t\to\infty$) observers, around
$x\to\infty... | [
{
"created": "Mon, 7 Mar 2016 07:42:45 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Apr 2016 10:11:23 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Apr 2016 12:20:12 GMT",
"version": "v3"
},
{
"created": "Fri, 25 May 2018 10:33:54 GMT",
"version": "v4"
}
] | 2018-06-05 | [
[
"Lochan",
"Kinjalk",
""
],
[
"Chakraborty",
"Sumanta",
""
],
[
"Padmanabhan",
"T.",
""
]
] | We study a dynamic version of the Unruh effect in a two dimensional collapse model forming a black hole. In this two-dimensional collapse model a scalar field coupled to the dilaton gravity, moving leftwards, collapses to form a black hole. There are two sets of asymptotic ($t\to\infty$) observers, around $x\to\infty$ ... |
2308.04692 | Marica Minucci | Marica Minucci | Conformal geodesics and the evolution of spacetimes with positive
Cosmological constant | 23 pages, 4 figures. Submitted to Philosophical Transactions A issue:
"At the interface of asymptotics, conformal methods and analysis in general
relativity". arXiv admin note: substantial text overlap with arXiv:2302.04004 | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | This article provides a discussion on the construction of conformal Gaussian
gauge systems to study the evolution of solutions to the Einstein field
equations with positive Cosmological constant. This is done by means of a gauge
based on the properties of conformal geodesics. The use of this gauge, combined
with the ... | [
{
"created": "Wed, 9 Aug 2023 04:05:05 GMT",
"version": "v1"
}
] | 2023-08-10 | [
[
"Minucci",
"Marica",
""
]
] | This article provides a discussion on the construction of conformal Gaussian gauge systems to study the evolution of solutions to the Einstein field equations with positive Cosmological constant. This is done by means of a gauge based on the properties of conformal geodesics. The use of this gauge, combined with the ex... |
gr-qc/0703042 | Lorenzo Iorio | Lorenzo Iorio | Reply to "The meaning of systematic errors, a comment to "Reply to On
the Systematic Errors in the Detection of the Lense-Thirring Effect with a
Mars Orbiter", by Lorenzo Iorio'', by G. Felici | LaTex, 2 pages, no figures, no tables, 6 references. It refers to
gr-qc/0703020, by G. Felici. Clarifications about the orbit overlap
differences added | null | null | null | gr-qc astro-ph hep-ph physics.space-ph | null | In this note we reply to the criticisms by Felici concerning some aspects of
the recent frame-dragging test performed by Iorio with the Mars Global Surveyor
(MGS) spacecraft in the gravitational field of Mars.
| [
{
"created": "Tue, 6 Mar 2007 16:29:37 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Mar 2007 21:51:23 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Mar 2007 00:35:24 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Iorio",
"Lorenzo",
""
]
] | In this note we reply to the criticisms by Felici concerning some aspects of the recent frame-dragging test performed by Iorio with the Mars Global Surveyor (MGS) spacecraft in the gravitational field of Mars. |
1101.0873 | Yurii Ignatyev | Yu.G. Ignatyev, E.G. Chepkunova | The moving semibounded magnetoactive plasma in field of a flat
gravitational wave | 8 pages, 5 figures, 5 references | Grav.Cosmol.10:319-322,2004 | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of a moving semibounded magnetoactive plasmas in a plane
gravitational wave is research on the basis of the self-consistent equations,
obtained earlier by the Authors.
| [
{
"created": "Wed, 5 Jan 2011 02:44:07 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Ignatyev",
"Yu. G.",
""
],
[
"Chepkunova",
"E. G.",
""
]
] | The problem of a moving semibounded magnetoactive plasmas in a plane gravitational wave is research on the basis of the self-consistent equations, obtained earlier by the Authors. |
1304.6474 | Shahar Hod | Shahar Hod | No-bomb theorem for charged Reissner-Nordstrom black holes | 6 pages, See: Physics Letters B 713, 505 (2012) for the extremal case | Physics Letters B 718, 1489 (2013) | 10.1016/j.physletb.2012.06.043 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The fundamental role played by black holes in many areas of physics makes it
highly important to explore the nature of their stability. The stability of
charged Reissner-Nordstr\"om black holes to {\it neutral} (gravitational and
electromagnetic) perturbations was established almost four decades ago.
However, the sta... | [
{
"created": "Wed, 24 Apr 2013 03:17:50 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jun 2013 04:39:11 GMT",
"version": "v2"
}
] | 2015-06-15 | [
[
"Hod",
"Shahar",
""
]
] | The fundamental role played by black holes in many areas of physics makes it highly important to explore the nature of their stability. The stability of charged Reissner-Nordstr\"om black holes to {\it neutral} (gravitational and electromagnetic) perturbations was established almost four decades ago. However, the stabi... |
gr-qc/9706032 | Andrew Chamblin | A. Chamblin (Santa Barbara, ITP & Cambridge U., DAMTP), J.M.A.
Ashbourn-Chamblin (Oxford U., Wolfson College), R. Emparan (UC, Santa
Barbara), A. Sornborger (Cambridge U., DAMTP) | Abelian Higgs hair for extreme black holes and selection rules for
snapping strings | 4 pages REVTeX plus 3 figures. Additional figures and mpeg movies
available at http://www.damtp.cam.ac.uk/user/ats25/strhole.html This paper is
a condensed version of gr-qc/9706004, and is essentially the talk presented
at The Eighth Marcel Grossmann Meeting on General Relativity, 22-27 June
1997, The Hebrew Un... | Phys.Rev.Lett. 80 (1998) 4378-4381 | 10.1103/PhysRevLett.80.4378 | null | gr-qc | null | It has been argued that a black hole horizon can support the long range
fields of a Nielsen-Olesen string, and that one can think of such a vortex as
black hole ``hair''. We show that the fields inside the vortex are completely
expelled from a charged black hole in the extreme limit (but not in the near
extreme limit... | [
{
"created": "Thu, 12 Jun 1997 22:06:19 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Chamblin",
"A.",
"",
"Santa Barbara, ITP & Cambridge U., DAMTP"
],
[
"Ashbourn-Chamblin",
"J. M. A.",
"",
"Oxford U., Wolfson College"
],
[
"Emparan",
"R.",
"",
"UC, Santa\n Barbara"
],
[
"Sornborger",
"A.",
"",
"Cambridge U., DAMTP"
... | It has been argued that a black hole horizon can support the long range fields of a Nielsen-Olesen string, and that one can think of such a vortex as black hole ``hair''. We show that the fields inside the vortex are completely expelled from a charged black hole in the extreme limit (but not in the near extreme limit).... |
1508.03028 | Yurii Ignat'ev | Yurii Ignat'ev | The Statistical Model with Interpartial Scalar Conformally Invariant
Interaction | 19 pages, 29 references | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A closed mathematical model of the statistical self-gravitating system of
scalar charged particles for conformal invariant scalar interactions is
constructed on the basis of relativistic kinetics and gravitation theory.
Asymptotic properties of the model are investigated in the ultrarelativistic
limit. It is shown, t... | [
{
"created": "Wed, 12 Aug 2015 18:53:44 GMT",
"version": "v1"
}
] | 2015-08-13 | [
[
"Ignat'ev",
"Yurii",
""
]
] | A closed mathematical model of the statistical self-gravitating system of scalar charged particles for conformal invariant scalar interactions is constructed on the basis of relativistic kinetics and gravitation theory. Asymptotic properties of the model are investigated in the ultrarelativistic limit. It is shown, tha... |
2007.13329 | Guansheng He | Guansheng He, Chunhua Jiang, and Wenbin Lin | Second Post-Minkowskian Metric for a Moving Kerr Black Hole | null | Int. J. Mod. Phys. D 23, 1450079 (2014) | 10.1142/S0218271814500795 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The harmonic metric for a moving Kerr black hole is presented in the second
post-Minkowskian approximation. It is further demonstrated that the obtained
metric is consistent with the Li\'{e}nard-Wiechert gravitational potential for
a moving and spinning source with an arbitrary constant velocity. Based on the
metric,... | [
{
"created": "Mon, 27 Jul 2020 07:06:22 GMT",
"version": "v1"
}
] | 2020-07-28 | [
[
"He",
"Guansheng",
""
],
[
"Jiang",
"Chunhua",
""
],
[
"Lin",
"Wenbin",
""
]
] | The harmonic metric for a moving Kerr black hole is presented in the second post-Minkowskian approximation. It is further demonstrated that the obtained metric is consistent with the Li\'{e}nard-Wiechert gravitational potential for a moving and spinning source with an arbitrary constant velocity. Based on the metric, w... |
1609.09362 | Neven Bili\'c | Neven Bilic | Randall-Sundrum vs. Holographic Braneworld | 3 pages, to appear in the proceedings of Rencontres de Moriond
Cosmology 2016 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A mapping between two braneworld cosmologies -- Randall-Sundrum and
holographic -- is explicitly constructed. The cosmologies are governed by the
appropriate modified Friedman equations. A relationship between the
corresponding Hubble rates is established.
| [
{
"created": "Thu, 29 Sep 2016 14:31:16 GMT",
"version": "v1"
}
] | 2016-09-30 | [
[
"Bilic",
"Neven",
""
]
] | A mapping between two braneworld cosmologies -- Randall-Sundrum and holographic -- is explicitly constructed. The cosmologies are governed by the appropriate modified Friedman equations. A relationship between the corresponding Hubble rates is established. |
1706.07753 | Jinn-Ouk Gong | Jinn-Ouk Gong, Jai-chan Hwang, Hyerim Noh, David Wu and Jaiyul Yoo | Exact non-linear equations for cosmological perturbations | (v1) 10 pages, 1 table; (v2) important update to employ any spatial
gauge condition; (v3) more discussions, to appear in Journal of Cosmology and
Astroparticle Physics | JCAP 10 (2017) 027 | 10.1088/1475-7516/2017/10/027 | APCTP-Pre2017-009 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a complete set of exact and fully non-linear equations describing
all three types of cosmological perturbations -- scalar, vector and tensor
perturbations. We derive the equations in a thoroughly gauge-ready manner, so
that any spatial and temporal gauge conditions can be employed. The equations
are comple... | [
{
"created": "Fri, 23 Jun 2017 15:41:26 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jul 2017 07:32:18 GMT",
"version": "v2"
},
{
"created": "Thu, 19 Oct 2017 01:34:59 GMT",
"version": "v3"
}
] | 2017-10-23 | [
[
"Gong",
"Jinn-Ouk",
""
],
[
"Hwang",
"Jai-chan",
""
],
[
"Noh",
"Hyerim",
""
],
[
"Wu",
"David",
""
],
[
"Yoo",
"Jaiyul",
""
]
] | We present a complete set of exact and fully non-linear equations describing all three types of cosmological perturbations -- scalar, vector and tensor perturbations. We derive the equations in a thoroughly gauge-ready manner, so that any spatial and temporal gauge conditions can be employed. The equations are complete... |
1010.6258 | S. Mignemi | M.C. Carrisi and S. Mignemi | Snyder-de Sitter model from two-time physics | 9 pages | Phys.Rev.D82:105031,2010 | 10.1103/PhysRevD.82.105031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the symplectic structure of the Snyder model on a de Sitter
background can be derived from two-time physics in seven dimensions and propose
a Hamiltonian for a free particle consistent with the symmetries of the model.
| [
{
"created": "Fri, 29 Oct 2010 16:12:20 GMT",
"version": "v1"
}
] | 2010-12-23 | [
[
"Carrisi",
"M. C.",
""
],
[
"Mignemi",
"S.",
""
]
] | We show that the symplectic structure of the Snyder model on a de Sitter background can be derived from two-time physics in seven dimensions and propose a Hamiltonian for a free particle consistent with the symmetries of the model. |
0805.1078 | Timothy Dulaney | Timothy R. Dulaney, Moira I. Gresham | Direction-dependent Jeans instability in an anisotropic Bianchi type I
space-time | 11 pages, two column; references and new section on observational
limits added, typos corrected and clarifications made in text | null | null | CALT-68-2683 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the metric for a Bianchi type I space-time with energy density that
is dominated by that of a perfect fluid with equation of state $p=w\rho$ and
whose anisotropy is seeded by a fixed norm spacelike vector field. We solve for
the evolution of perturbations about this space-time. In particular, the Jeans
inst... | [
{
"created": "Thu, 8 May 2008 00:17:39 GMT",
"version": "v1"
},
{
"created": "Wed, 21 May 2008 18:32:28 GMT",
"version": "v2"
}
] | 2008-05-21 | [
[
"Dulaney",
"Timothy R.",
""
],
[
"Gresham",
"Moira I.",
""
]
] | We derive the metric for a Bianchi type I space-time with energy density that is dominated by that of a perfect fluid with equation of state $p=w\rho$ and whose anisotropy is seeded by a fixed norm spacelike vector field. We solve for the evolution of perturbations about this space-time. In particular, the Jeans instab... |
1510.02725 | Mehdi Saravani | Mehdi Saravani, Siavash Aslanbeigi and Achim Kempf | Spacetime Curvature in terms of Scalar Field Propagators | null | Phys. Rev. D 93, 045026 (2016) | 10.1103/PhysRevD.93.045026 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show how quantum fields can be used to measure the curvature of spacetime.
In particular, we find that knowledge of the imprint that spacetime curvature
leaves in the correlators of quantum fields suffices, in principle, to
reconstruct the metric. We then consider the possibility that the quantum
fields obey a nat... | [
{
"created": "Fri, 9 Oct 2015 16:12:44 GMT",
"version": "v1"
}
] | 2016-03-02 | [
[
"Saravani",
"Mehdi",
""
],
[
"Aslanbeigi",
"Siavash",
""
],
[
"Kempf",
"Achim",
""
]
] | We show how quantum fields can be used to measure the curvature of spacetime. In particular, we find that knowledge of the imprint that spacetime curvature leaves in the correlators of quantum fields suffices, in principle, to reconstruct the metric. We then consider the possibility that the quantum fields obey a natur... |
1502.02284 | Chris Mueller | Chris L. Mueller, Paul Fulda, Rana X. Adhikari, Koji Arai, Aidan F.
Brooks, Rijuparna Chakraborty, Valery V. Frolov, Peter Fritschel, Eleanor J.
King, David B. Tanner, Hiroaki Yamamoto, Guido Mueller | In-situ characterization of the thermal state of resonant optical
interferometers via tracking of their higher-order mode resonances | null | null | null | null | gr-qc physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Thermal lensing in resonant optical interferometers such as those used for
gravitational wave detection is a concern due to the negative impact on control
signals and instrument sensitivity. In this paper we describe a method for
monitoring the thermal state of such interferometers by probing the
higher-order spatial... | [
{
"created": "Sun, 8 Feb 2015 18:27:09 GMT",
"version": "v1"
}
] | 2015-02-10 | [
[
"Mueller",
"Chris L.",
""
],
[
"Fulda",
"Paul",
""
],
[
"Adhikari",
"Rana X.",
""
],
[
"Arai",
"Koji",
""
],
[
"Brooks",
"Aidan F.",
""
],
[
"Chakraborty",
"Rijuparna",
""
],
[
"Frolov",
"Valery V.",
""
]... | Thermal lensing in resonant optical interferometers such as those used for gravitational wave detection is a concern due to the negative impact on control signals and instrument sensitivity. In this paper we describe a method for monitoring the thermal state of such interferometers by probing the higher-order spatial m... |
gr-qc/9512011 | Jorge Griego | Jorge Griego | On the extended loop calculus | 11 pages | null | null | IFFC-95-07 | gr-qc | null | Some features of extended loops are considered. In particular, the behaviour
under diffeomorphism transformations of the wavefunctions with support on the
extended loop space are studied. The basis of a method to obtain analytical
expressions of diffeomorphism invariants via extended loops are settled.
Applications t... | [
{
"created": "Tue, 5 Dec 1995 20:20:25 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Griego",
"Jorge",
""
]
] | Some features of extended loops are considered. In particular, the behaviour under diffeomorphism transformations of the wavefunctions with support on the extended loop space are studied. The basis of a method to obtain analytical expressions of diffeomorphism invariants via extended loops are settled. Applications to ... |
gr-qc/9908059 | Koji Uryu | Koji Uryu (SISSA), Yoshiharu Eriguchi (Univ.Tokyo) | A new numerical method for constructing quasi-equilibrium sequences of
irrotational binary neutron stars in general relativity | 20 pages, 18 figures, more results of convergence tests are added,
revised version accepted for publication in PRD | Phys.Rev. D61 (2000) 124023 | 10.1103/PhysRevD.61.124023 | null | gr-qc astro-ph | null | We propose a new numerical method to compute quasi-equilibrium sequences of
general relativistic irrotational binary neutron star systems. It is a good
approximation to assume that (1) the binary star system is irrotational, i.e.
the vorticity of the flow field inside component stars vanishes everywhere
(irrotational... | [
{
"created": "Fri, 20 Aug 1999 13:58:23 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Mar 2000 19:20:14 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Uryu",
"Koji",
"",
"SISSA"
],
[
"Eriguchi",
"Yoshiharu",
"",
"Univ.Tokyo"
]
] | We propose a new numerical method to compute quasi-equilibrium sequences of general relativistic irrotational binary neutron star systems. It is a good approximation to assume that (1) the binary star system is irrotational, i.e. the vorticity of the flow field inside component stars vanishes everywhere (irrotational f... |
1201.6196 | Sergey Vyatchanin | Andrey A. Rakhubovsky and Sergey P. Vyatchanin | Sensitivity of laser gravitational-wave detectors with stable
double-pumped optical spring | 8 pages, 5 figures, 2 tables | null | 10.1016/j.physleta.2012.03.030 | null | gr-qc physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the sensitivity of gravitational-wave antenna with stable double
optical spring created by two independent pumps. We investigate regime of three
close eigen frequencies (roots of characteristic equation) which appears to
provide more wide frequency band in which sensitivity of antenna can beat
Standard Qua... | [
{
"created": "Mon, 30 Jan 2012 12:33:58 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Rakhubovsky",
"Andrey A.",
""
],
[
"Vyatchanin",
"Sergey P.",
""
]
] | We analyze the sensitivity of gravitational-wave antenna with stable double optical spring created by two independent pumps. We investigate regime of three close eigen frequencies (roots of characteristic equation) which appears to provide more wide frequency band in which sensitivity of antenna can beat Standard Quant... |
0909.5694 | Mauricio Bellini | Jesus Martin Romero and Mauricio Bellini (Mar del Plata University &
CONICET) | Entropy evolution in warm inflation from a 5D vacuum | minor changes | Nuovo Cim.B124:861-868,2009 | 10.1393/ncb/i2010-10810-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using some ideas of Modern Kaluza-Klein theory, we examine the evolution of
entropy on a 4D Friedmann-Robertson-Walker (FRW) brane from a 5D vacuum state,
which is defined on a 5D background Riemann-flat metric. We found that entropy
production is sufficiently important during inflation: $S > 10^{90}$, for all
the in... | [
{
"created": "Wed, 30 Sep 2009 19:26:32 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Oct 2009 13:27:43 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Nov 2009 19:26:15 GMT",
"version": "v3"
},
{
"created": "Tue, 15 Dec 2009 16:23:39 GMT",
"version": "v4"
}
] | 2010-04-21 | [
[
"Romero",
"Jesus Martin",
"",
"Mar del Plata University &\n CONICET"
],
[
"Bellini",
"Mauricio",
"",
"Mar del Plata University &\n CONICET"
]
] | Using some ideas of Modern Kaluza-Klein theory, we examine the evolution of entropy on a 4D Friedmann-Robertson-Walker (FRW) brane from a 5D vacuum state, which is defined on a 5D background Riemann-flat metric. We found that entropy production is sufficiently important during inflation: $S > 10^{90}$, for all the init... |
2401.04442 | Finnian Gray | Wan Cong, Piotr T. Chru\'sciel, and Finnian Gray | Characteristic Gluing with $\Lambda$: II. Linearised equations in higher
dimensions | v2; update includes changes and additions to streamline compatibility
with part III---the nonlinear gluing. 145 pages, 72 main text plus appendices
and index, 4 figures, results summarised in 4 tables | null | null | UWThPh-2024-2 | gr-qc math-ph math.AP math.DG math.MP | http://creativecommons.org/licenses/by/4.0/ | We prove a gluing theorem for linearised vacuum gravitational fields in Bondi
gauge on a class of characteristic hypersurfaces in static vacuum
$(n+1)$-dimensional backgrounds with cosmological constant $ \Lambda \in
\mathbb{R}$, $n\ge 4$. This generalises, in the linearised case, the pioneering
analysis of Aretakis,... | [
{
"created": "Tue, 9 Jan 2024 09:13:49 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jul 2024 13:49:48 GMT",
"version": "v2"
}
] | 2024-07-10 | [
[
"Cong",
"Wan",
""
],
[
"Chruściel",
"Piotr T.",
""
],
[
"Gray",
"Finnian",
""
]
] | We prove a gluing theorem for linearised vacuum gravitational fields in Bondi gauge on a class of characteristic hypersurfaces in static vacuum $(n+1)$-dimensional backgrounds with cosmological constant $ \Lambda \in \mathbb{R}$, $n\ge 4$. This generalises, in the linearised case, the pioneering analysis of Aretakis, C... |
1204.4290 | Chao-Guang Huang | Chao-Guang Huang, Yu Tian, Xiao-Ning Wu, Zhan Xu, Bin Zhou | Geometries with the second Poincar\'e symmetry | 21 pages | Commun. Theor. Phys. 57 (2012) 553-562 | 10.1088/0253-6102/57/4/06 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The second Poincar\'e kinematical group serves as one of new ones in addition
to the known possible kinematics. The geometries with the second Poincar\'e
symmetry is presented and their properties are analyzed. On the geometries, the
new mechanics based on the principle of relativity with two universal constants
$(c,... | [
{
"created": "Thu, 19 Apr 2012 09:10:31 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Huang",
"Chao-Guang",
""
],
[
"Tian",
"Yu",
""
],
[
"Wu",
"Xiao-Ning",
""
],
[
"Xu",
"Zhan",
""
],
[
"Zhou",
"Bin",
""
]
] | The second Poincar\'e kinematical group serves as one of new ones in addition to the known possible kinematics. The geometries with the second Poincar\'e symmetry is presented and their properties are analyzed. On the geometries, the new mechanics based on the principle of relativity with two universal constants $(c,l)... |
1208.6450 | Hristu Culetu | Hristu Culetu | On the conformally flat Rindler-like geometry | 7 pages, no figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The time dependent conformally-flat spherical Rindler spacetime is
investigated. The geometry has an apparent horizon that coincides with the
causal horizon. The scalar acceleration of a static observer is constant and
equals to the acceleration $g$ from the static expression of the Rindler-like
metric. The timelike ... | [
{
"created": "Fri, 31 Aug 2012 10:35:38 GMT",
"version": "v1"
}
] | 2012-09-03 | [
[
"Culetu",
"Hristu",
""
]
] | The time dependent conformally-flat spherical Rindler spacetime is investigated. The geometry has an apparent horizon that coincides with the causal horizon. The scalar acceleration of a static observer is constant and equals to the acceleration $g$ from the static expression of the Rindler-like metric. The timelike ra... |
1311.6004 | Riccardo Moriconi | Orchidea Maria Lecian and Giovanni Montani and Riccardo Moriconi | Semiclassical and quantum behavior of the Mixmaster model in the polymer
approach | 18 pages, 24 figures | Physical Review D 88, 103511 (2013) | 10.1103/PhysRevD.88.103511 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | We analyze the quantum dynamics of the Bianchi Type IX model, as described in
the so-called polymer representation of quantum mechanics, to characterize the
modifications that a discrete na- ture in the anisotropy variables of the
Universe induces on the morphology of the cosmological sin- gularity. We first
perform ... | [
{
"created": "Sat, 23 Nov 2013 15:09:55 GMT",
"version": "v1"
}
] | 2013-12-24 | [
[
"Lecian",
"Orchidea Maria",
""
],
[
"Montani",
"Giovanni",
""
],
[
"Moriconi",
"Riccardo",
""
]
] | We analyze the quantum dynamics of the Bianchi Type IX model, as described in the so-called polymer representation of quantum mechanics, to characterize the modifications that a discrete na- ture in the anisotropy variables of the Universe induces on the morphology of the cosmological sin- gularity. We first perform a ... |
1805.08800 | Kinjalk Lochan | Kinjalk Lochan, Karthik Rajeev, Amit Vikram and T. Padmanabhan | Quantum Correlators in Friedmann Spacetimes -The omnipresent de Sitter
and the invariant vacuum noise | Published version | Phys. Rev. D 98, 105015 (2018) | 10.1103/PhysRevD.98.105015 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss several aspects of quantum field theory of a scalar field in a
Friedmann universe, clarifying and highlighting several conceptual and
technical issues. (A) We show that one can map the dynamics of (1) a massless
scalar field in a universe with power law expansion to (2) a massive scalar
field in the de Sit... | [
{
"created": "Tue, 22 May 2018 18:05:32 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Jan 2019 03:50:43 GMT",
"version": "v2"
}
] | 2019-01-17 | [
[
"Lochan",
"Kinjalk",
""
],
[
"Rajeev",
"Karthik",
""
],
[
"Vikram",
"Amit",
""
],
[
"Padmanabhan",
"T.",
""
]
] | We discuss several aspects of quantum field theory of a scalar field in a Friedmann universe, clarifying and highlighting several conceptual and technical issues. (A) We show that one can map the dynamics of (1) a massless scalar field in a universe with power law expansion to (2) a massive scalar field in the de Sitte... |
1910.11701 | Luis B Castro | Francisco A. Cruz Neto, Camila C. Soares, Luis B. Castro | Comment on "Comment on linear confinement of a scalar particle in a
G\"{o}del-type space-time" | 2 pages | Eur. Phys. J. C (2020) 80: 53 | 10.1140/epjc/s10052-019-7603-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that from an appropriate manipulation of the biconfluent Heun
differential equation can obtain the correct expression for the energy
eigenvalues for the Klein-Gordon equation without potential in the background
of Som-Raychaudhuri space-time with a cosmic string as a case particular
($k_{L}=0$) of [Vit\'{o}ri... | [
{
"created": "Thu, 24 Oct 2019 11:07:18 GMT",
"version": "v1"
}
] | 2020-01-29 | [
[
"Neto",
"Francisco A. Cruz",
""
],
[
"Soares",
"Camila C.",
""
],
[
"Castro",
"Luis B.",
""
]
] | We show that from an appropriate manipulation of the biconfluent Heun differential equation can obtain the correct expression for the energy eigenvalues for the Klein-Gordon equation without potential in the background of Som-Raychaudhuri space-time with a cosmic string as a case particular ($k_{L}=0$) of [Vit\'{o}ria ... |
1810.08822 | Grigoris Panotopoulos | \'Angel Rinc\'on and Grigoris Panotopoulos | Greybody factors and quasinormal modes for a nonminimally coupled scalar
field in a cloud of strings in (2+1)-dimensional background | References added | null | 10.1140/epjc/s10052-018-6352-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the propagation of a probe massless nonminimally coupled scalar
field in a fixed gravitational background of a cloud of strings in (2+1)
dimensions. We obtain exact analytical expressions for the reflection
coefficient, the absorption cross section, the decay rate as well as the
quasinormal frequencies. The ... | [
{
"created": "Sat, 20 Oct 2018 15:52:28 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Nov 2018 15:59:09 GMT",
"version": "v2"
}
] | 2018-11-14 | [
[
"Rincón",
"Ángel",
""
],
[
"Panotopoulos",
"Grigoris",
""
]
] | We study the propagation of a probe massless nonminimally coupled scalar field in a fixed gravitational background of a cloud of strings in (2+1) dimensions. We obtain exact analytical expressions for the reflection coefficient, the absorption cross section, the decay rate as well as the quasinormal frequencies. The im... |
1911.04535 | Damianos Iosifidis | Damianos Iosifidis | Linear Transformations on Affine-Connections | 8 pages, Applications section added | null | 10.1088/1361-6382/ab778d | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We state and prove a simple Theorem that allows one to generate invariant
quantities in Metric-Affine Geometry, under a given transformation of the
affine connection. We start by a general functional of the metric and the
connection and consider transformations of the affine connection possessing a
certain symmetry. ... | [
{
"created": "Mon, 11 Nov 2019 19:37:56 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Mar 2020 10:14:17 GMT",
"version": "v2"
}
] | 2020-03-11 | [
[
"Iosifidis",
"Damianos",
""
]
] | We state and prove a simple Theorem that allows one to generate invariant quantities in Metric-Affine Geometry, under a given transformation of the affine connection. We start by a general functional of the metric and the connection and consider transformations of the affine connection possessing a certain symmetry. We... |
2211.05059 | Biswajit Deb | Biswajit Deb, Sabina Yeasmin, Atri Deshamukhya | Warm Inflation in $f(R,T)$ gravity | 19 pages, 5 figures | Chin. J. Phys. 85 (2023) 359-374 | 10.1016/j.cjph.2023.07.004 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work, we explored warm inflation in the background of $f(R,T)$
gravity in the strong dissipation regime. Considering scalar field for FLRW
universe, we derived modified field equations. We then deduced slow-roll
parameters under slow-roll approximations followed by power spectrum for scalar
and tensor perturb... | [
{
"created": "Wed, 9 Nov 2022 17:42:02 GMT",
"version": "v1"
}
] | 2023-11-07 | [
[
"Deb",
"Biswajit",
""
],
[
"Yeasmin",
"Sabina",
""
],
[
"Deshamukhya",
"Atri",
""
]
] | In this work, we explored warm inflation in the background of $f(R,T)$ gravity in the strong dissipation regime. Considering scalar field for FLRW universe, we derived modified field equations. We then deduced slow-roll parameters under slow-roll approximations followed by power spectrum for scalar and tensor perturbat... |
1705.02862 | Hanno Sahlmann | Wojciech Kaminski, Marcin Kisielowski, Hanno Sahlmann | Asymptotic analysis of the EPRL model with timelike tetrahedra | v2: 97 pages, 4 figures, as published in CQG | Class. Quant. Grav. 35 (2018) no.13, 135012 | 10.1088/1361-6382/aac6a4 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform the stationary phase analysis of the vertex amplitude for the EPRL
spin foam model extended to include timelike tetrahedra. We analyse both,
tetrahedra of signature $---$ (standard EPRL), as well as of signature $+--$
(Hnybida-Conrady extension), in a unified fashion. However, we assume all faces
to be of ... | [
{
"created": "Mon, 8 May 2017 13:32:32 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Jun 2019 11:44:48 GMT",
"version": "v2"
}
] | 2019-06-12 | [
[
"Kaminski",
"Wojciech",
""
],
[
"Kisielowski",
"Marcin",
""
],
[
"Sahlmann",
"Hanno",
""
]
] | We perform the stationary phase analysis of the vertex amplitude for the EPRL spin foam model extended to include timelike tetrahedra. We analyse both, tetrahedra of signature $---$ (standard EPRL), as well as of signature $+--$ (Hnybida-Conrady extension), in a unified fashion. However, we assume all faces to be of si... |
2202.08958 | Andrew DeBenedictis | Andrew DeBenedictis, Sa\v{s}a Iliji\'c, Marko Sossich | On spherically symmetric vacuum solutions and horizons in covariant
$f(T)$ gravity theory | 17 pages. Version 2 has an extra reference and has some clarifying
remarks regarding the choice of spin connection, and Lorentz covariance
explicitly illustrating parity and time-reversal invariance. Matches the
version accepted for publication in Physical Review D | Phys. Rev. D 105, 084020 (2022) | 10.1103/PhysRevD.105.084020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study properties that the vacuum must possess in the minimal
extension to the teleparallel equivalent of general relativity (TEGR) where the
action is supplemented with a quadratic torsion term. No assumption is made
about the weakness of the quadratic term although in the weak-field regime the
valid... | [
{
"created": "Fri, 18 Feb 2022 02:09:30 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Mar 2022 22:58:25 GMT",
"version": "v2"
}
] | 2022-04-15 | [
[
"DeBenedictis",
"Andrew",
""
],
[
"Ilijić",
"Saša",
""
],
[
"Sossich",
"Marko",
""
]
] | In this paper we study properties that the vacuum must possess in the minimal extension to the teleparallel equivalent of general relativity (TEGR) where the action is supplemented with a quadratic torsion term. No assumption is made about the weakness of the quadratic term although in the weak-field regime the validit... |
gr-qc/0107019 | Shin'ichirou Yoshida | Luciano Rezzolla (1), Koji Uryu (1,2), Shin'ichirou Yoshida (1) ((1)
SISSA, (2) U.Wisconsin-Milwaukee) | Gravitational Wave Emission by Cataclysmic Variables: numerical models
of semi-detached binaries | 7pages, 4figures. To appear in MNRAS | Mon.Not.Roy.Astron.Soc. 327 (2001) 888 | 10.1046/j.1365-8711.2001.04796.x | null | gr-qc astro-ph | null | Gravitational wave emission is considered to be the driving force for the
evolution of short-period cataclysmic binary stars, making them a potential
test for the validity of General Relativity. In spite of continuous refinements
of the physical description, a 10% mismatch exists between the theoretical
minimum perio... | [
{
"created": "Thu, 5 Jul 2001 13:52:56 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Rezzolla",
"Luciano",
""
],
[
"Uryu",
"Koji",
""
],
[
"Yoshida",
"Shin'ichirou",
""
]
] | Gravitational wave emission is considered to be the driving force for the evolution of short-period cataclysmic binary stars, making them a potential test for the validity of General Relativity. In spite of continuous refinements of the physical description, a 10% mismatch exists between the theoretical minimum period ... |
0808.3126 | Eric Woolgar | M M Akbar and E Woolgar | Ricci Solitons and Einstein-Scalar Field Theory | 17 pages, 1 figure; Revised version (organizational changes, other
minor revisions and corrections, citations corrected and added), to appear in
CQG | Class.Quant.Grav.26:055015,2009 | 10.1088/0264-9381/26/5/055015 | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | B List has recently studied a geometric flow whose fixed points correspond to
static Ricci flat spacetimes. It is now known that this flow is in fact Ricci
flow modulo pullback by a certain diffeomorphism. We use this observation to
associate to each static Ricci flat spacetime a local Ricci soliton in one
higher dim... | [
{
"created": "Fri, 22 Aug 2008 19:13:12 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Jan 2009 00:08:33 GMT",
"version": "v2"
}
] | 2009-02-20 | [
[
"Akbar",
"M M",
""
],
[
"Woolgar",
"E",
""
]
] | B List has recently studied a geometric flow whose fixed points correspond to static Ricci flat spacetimes. It is now known that this flow is in fact Ricci flow modulo pullback by a certain diffeomorphism. We use this observation to associate to each static Ricci flat spacetime a local Ricci soliton in one higher dimen... |
gr-qc/9410022 | null | A. H. Bilge, M. Hortacsu, N. Ozdemir | Do Cosmic Strings Give Rise to Vacuum Fluctuations ? | 8 pages, MRC.PH-18/94, Plain Tex | null | null | null | gr-qc | null | The role of the identification of the vacuum and non-vacuum space-times in
the computation of vacuum fluctuations in the presence of a cosmic string is
discussed and an alternative interpretation of the renormalization is proposed.
This procedure does not give rise to vacuum fluctuations.
| [
{
"created": "Mon, 17 Oct 1994 15:34:36 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bilge",
"A. H.",
""
],
[
"Hortacsu",
"M.",
""
],
[
"Ozdemir",
"N.",
""
]
] | The role of the identification of the vacuum and non-vacuum space-times in the computation of vacuum fluctuations in the presence of a cosmic string is discussed and an alternative interpretation of the renormalization is proposed. This procedure does not give rise to vacuum fluctuations. |
1106.2905 | Roberto Peron | David M. Lucchesi and Roberto Peron | Accurate Measurement in the Field of the Earth of the
General-Relativistic Precession of the LAGEOS II Pericenter and New
Constraints on Non-Newtonian Gravity | null | Phys.Rev.Lett.105:231103,2010 | 10.1103/PhysRevLett.105.231103 | null | gr-qc physics.geo-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The pericenter shift of a binary system represents a suitable observable to
test for possible deviations from the Newtonian inverse-square law in favor of
new weak interactions between macroscopic objects. We analyzed 13 years of
tracking data of the LAGEOS satellites with GEODYN II software but with no
models for ge... | [
{
"created": "Wed, 15 Jun 2011 08:39:13 GMT",
"version": "v1"
}
] | 2011-06-21 | [
[
"Lucchesi",
"David M.",
""
],
[
"Peron",
"Roberto",
""
]
] | The pericenter shift of a binary system represents a suitable observable to test for possible deviations from the Newtonian inverse-square law in favor of new weak interactions between macroscopic objects. We analyzed 13 years of tracking data of the LAGEOS satellites with GEODYN II software but with no models for gene... |
0812.4865 | Kouji Nakamura | Kouji Nakamura | Consistency of Equations in the Second-order Gauge-invariant
Cosmological Perturbation Theory | (v1) 38pages, no figure; (v2) Typos and references are corrected | Prog. Theor. Phys. 121 (2009), 1321 | 10.1143/PTP.121.1321 | null | gr-qc astro-ph hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Along the general framework of the gauge-invariant perturbation theory
developed in the papers [K. Nakamura, Prog. Theor. Phys. {\bf 110} (2003), 723;
{\it ibid}, {\bf 113} (2005), 481.], we re-derive the second-order Einstein
equations on four-dimensional homogeneous isotropic background universe in
gauge-invariant ... | [
{
"created": "Mon, 29 Dec 2008 11:27:07 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Jan 2009 07:14:14 GMT",
"version": "v2"
}
] | 2009-07-03 | [
[
"Nakamura",
"Kouji",
""
]
] | Along the general framework of the gauge-invariant perturbation theory developed in the papers [K. Nakamura, Prog. Theor. Phys. {\bf 110} (2003), 723; {\it ibid}, {\bf 113} (2005), 481.], we re-derive the second-order Einstein equations on four-dimensional homogeneous isotropic background universe in gauge-invariant ma... |
1802.01986 | Qing Gao | Qing Gao | The observational constraint on constant-roll inflation | Typos corrected and references updated. Accepted for publication in
Sci. China Phys. Mech. Astron. arXiv admin note: substantial text overlap
with arXiv:1801.09208 | null | 10.1007/s11433-018-9197-2 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the constant-roll inflation with constant $\epsilon_2$ and
constant $\bar\eta$. By using the method of Bessel function approximation, the
analytical expressions for the scalar and tensor power spectra, the scalar and
tensor spectral tilts, and the tensor to scalar ratio are derived up to the
first order of... | [
{
"created": "Mon, 5 Feb 2018 09:09:20 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Mar 2018 04:06:39 GMT",
"version": "v2"
}
] | 2018-03-12 | [
[
"Gao",
"Qing",
""
]
] | We discuss the constant-roll inflation with constant $\epsilon_2$ and constant $\bar\eta$. By using the method of Bessel function approximation, the analytical expressions for the scalar and tensor power spectra, the scalar and tensor spectral tilts, and the tensor to scalar ratio are derived up to the first order of $... |
gr-qc/9901044 | Wang Anzhong | Anzhong Wang | Critical collapse in tensor-multi-scalar and non-linear gravity
theories: A universal class | latex, no figures | null | null | null | gr-qc | null | Critical collapse in tensor-multi-scalar gravity theories is studied, and
found that for any given target space all the theories conformally related
belong to the same universal class. When only one scalar field is present, the
universality is extended to include a class of non-linear gravity theories.
| [
{
"created": "Fri, 15 Jan 1999 14:15:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wang",
"Anzhong",
""
]
] | Critical collapse in tensor-multi-scalar gravity theories is studied, and found that for any given target space all the theories conformally related belong to the same universal class. When only one scalar field is present, the universality is extended to include a class of non-linear gravity theories. |
1712.09358 | Ali A. Asgari | Ali A. Asgari and Amir H. Abbassi | Imprints of intrinsic and exterior curvatures in cosmology | 11 pages, version published in Gravit. Cosmol | Grav.Cosmol.27(2021)152-156 | 10.1134/S0202289321020031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nowadays, according to the observational evidences the curvature parameter of
the universe is neglected and spatially flat FLRW model is on the top of
interest for cosmologists. However, due to some discrepancies between
$\Lambda$-CDM model anticipations and observations, one may think out the
curvature parameter as ... | [
{
"created": "Tue, 26 Dec 2017 18:30:17 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Sep 2021 16:13:11 GMT",
"version": "v2"
}
] | 2021-09-30 | [
[
"Asgari",
"Ali A.",
""
],
[
"Abbassi",
"Amir H.",
""
]
] | Nowadays, according to the observational evidences the curvature parameter of the universe is neglected and spatially flat FLRW model is on the top of interest for cosmologists. However, due to some discrepancies between $\Lambda$-CDM model anticipations and observations, one may think out the curvature parameter as th... |
gr-qc/0007011 | Samir Mathur | Samir D. Mathur | Resolving the black hole information paradox | harvmac, 11 pages (1 figure) (This essay received an ``honorable
mention'' in the Annual Essay Competition of the Gravity Research Foundation
for the year 2000.) | Int.J.Mod.Phys. A15 (2000) 4877 | 10.1142/S0217751X00002147 | OHSTPY-HEP-T-00-015 | gr-qc hep-th | null | The recent progress in string theory strongly suggests that formation and
evaporation of black holes is a unitary process. This fact makes it imperative
that we find a flaw in the semiclassical reasoning that implies a loss of
information. We propose a new criterion that limits the domain of classical
gravity: the hy... | [
{
"created": "Fri, 7 Jul 2000 21:07:05 GMT",
"version": "v1"
}
] | 2016-12-28 | [
[
"Mathur",
"Samir D.",
""
]
] | The recent progress in string theory strongly suggests that formation and evaporation of black holes is a unitary process. This fact makes it imperative that we find a flaw in the semiclassical reasoning that implies a loss of information. We propose a new criterion that limits the domain of classical gravity: the hype... |
2407.05272 | Shi-Jie Ma | Shi-Jie Ma, Rui-Bo Wang, Tian-Chi Ma, He-Xu Zhang, Jian-Bo Deng and
Xian-Ru Hu | Quasinormal modes and greybody factor of Schwarzschild Black Hole in the
Cold Dark Matter Halo | 22 pages, 5 figures, 4 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we firstly studied wave function in static spherically
symmetric spacetime and obtained effective potential of perturbed fields with
spin. Then we applied $6^{\rm{th}}$ order WKB approximation to analyze
quasinormal modes of Schwarzschild black hole in the Cold Dark Matter halo in
perturbed fields wi... | [
{
"created": "Sun, 7 Jul 2024 06:08:46 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jul 2024 08:49:29 GMT",
"version": "v2"
}
] | 2024-07-11 | [
[
"Ma",
"Shi-Jie",
""
],
[
"Wang",
"Rui-Bo",
""
],
[
"Ma",
"Tian-Chi",
""
],
[
"Zhang",
"He-Xu",
""
],
[
"Deng",
"Jian-Bo",
""
],
[
"Hu",
"Xian-Ru",
""
]
] | In this article, we firstly studied wave function in static spherically symmetric spacetime and obtained effective potential of perturbed fields with spin. Then we applied $6^{\rm{th}}$ order WKB approximation to analyze quasinormal modes of Schwarzschild black hole in the Cold Dark Matter halo in perturbed fields with... |
2307.11391 | S Feng | Shuai Feng, Bao-Min Gu and Fu-Wen Shu | Quantum Gravity Induced Entanglement of Masses With Extra Dimensions | null | null | 10.1140/epjc/s10052-024-12413-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is believed that gravity can be considered as a quantum coherent mediator.
In this study, we propose a plan to test the existence of extra dimensions
using the Quantum Gravity Induced Entanglement of Masses (QGEM) experiment.
This experiment involves two freely falling test masses passing through a
Stern-Gerlach-l... | [
{
"created": "Fri, 21 Jul 2023 07:08:45 GMT",
"version": "v1"
},
{
"created": "Sun, 17 Mar 2024 15:12:37 GMT",
"version": "v2"
}
] | 2024-03-19 | [
[
"Feng",
"Shuai",
""
],
[
"Gu",
"Bao-Min",
""
],
[
"Shu",
"Fu-Wen",
""
]
] | It is believed that gravity can be considered as a quantum coherent mediator. In this study, we propose a plan to test the existence of extra dimensions using the Quantum Gravity Induced Entanglement of Masses (QGEM) experiment. This experiment involves two freely falling test masses passing through a Stern-Gerlach-lik... |
1703.03971 | Shunsuke Fujii | Akio Hosoya and Shunsuke Fujii | Informational Theory of Relativity | 34 pages, 7 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Assuming the minimal time to send a bit of information in the Einstein clock
synchronization of the two clocks located at different positions, we introduce
the extended metric to the information space. This modification of relativity
changes the red shift formula keeping the geodesic equation intact. Extending
the ga... | [
{
"created": "Sat, 11 Mar 2017 13:21:47 GMT",
"version": "v1"
},
{
"created": "Tue, 2 May 2017 07:25:15 GMT",
"version": "v2"
},
{
"created": "Mon, 9 Oct 2017 05:37:04 GMT",
"version": "v3"
},
{
"created": "Mon, 30 Apr 2018 13:57:14 GMT",
"version": "v4"
}
] | 2018-05-01 | [
[
"Hosoya",
"Akio",
""
],
[
"Fujii",
"Shunsuke",
""
]
] | Assuming the minimal time to send a bit of information in the Einstein clock synchronization of the two clocks located at different positions, we introduce the extended metric to the information space. This modification of relativity changes the red shift formula keeping the geodesic equation intact. Extending the gaug... |
1703.05675 | Antonio Dobado | Antonio Dobado | Spontaneous symmetry breaking and the Unruh effect | Presented at the Fourth International Conference on the Nature and
Ontology of Spacetime, dedicated to the 100th anniversary of the publication
of General Relativity, 30 May - 2 June 2016, Golden Sands, Varna, Bulgaria
(Minkowski Institute Press, Montreal 2017) | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we consider the ontological status of the Unruh effect. Is it
just a formal mathematical result? Or the temperature detected by an
accelerating observer can lead to real physical effects such as phase
transition. In order to clarify this issue we use the Thermalization Theorem to
explore the possibility ... | [
{
"created": "Thu, 16 Mar 2017 15:32:20 GMT",
"version": "v1"
}
] | 2017-03-17 | [
[
"Dobado",
"Antonio",
""
]
] | In this work we consider the ontological status of the Unruh effect. Is it just a formal mathematical result? Or the temperature detected by an accelerating observer can lead to real physical effects such as phase transition. In order to clarify this issue we use the Thermalization Theorem to explore the possibility of... |
2006.03092 | Gabriel Le\'on | Gabriel Leon and Maria Pia Piccirilli | Generation of inflationary perturbations in the continuous spontaneous
localization model: The second order power spectrum | 13 pages plus supplementary material, 21 pages total, 4 figures.
Replaced to match the published version | Phys. Rev. D 102, 043515 (2020) | 10.1103/PhysRevD.102.043515 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmic inflation, which describes an accelerated expansion of the early
Universe, yields the most successful predictions regarding temperature
anisotropies in the cosmic microwave background (CMB). Nevertheless, the
precise origin of the primordial perturbations and their quantum-to-classical
transition is still an o... | [
{
"created": "Thu, 4 Jun 2020 18:28:33 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Aug 2020 18:17:20 GMT",
"version": "v2"
}
] | 2020-08-14 | [
[
"Leon",
"Gabriel",
""
],
[
"Piccirilli",
"Maria Pia",
""
]
] | Cosmic inflation, which describes an accelerated expansion of the early Universe, yields the most successful predictions regarding temperature anisotropies in the cosmic microwave background (CMB). Nevertheless, the precise origin of the primordial perturbations and their quantum-to-classical transition is still an ope... |
1602.07138 | Jaume Haro | Jaume de Haro | On the viability of quintessential inflationary models from
observational data | version accepted for publication in GERG | null | 10.1007/s10714-016-2173-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Assuming that primordial density fluctuationas are nearly Gaussian, from a
frequentist viewpoint, the two-dimensional marginalized joint coincidence
contour in the plane $(n_s,r)$ (being $n_s$ the spectral index and $r$ the
ratio of tensor to scalar perturbations), without the presence of running is
usually used to t... | [
{
"created": "Tue, 23 Feb 2016 12:57:06 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Dec 2016 18:41:25 GMT",
"version": "v2"
}
] | 2016-12-21 | [
[
"de Haro",
"Jaume",
""
]
] | Assuming that primordial density fluctuationas are nearly Gaussian, from a frequentist viewpoint, the two-dimensional marginalized joint coincidence contour in the plane $(n_s,r)$ (being $n_s$ the spectral index and $r$ the ratio of tensor to scalar perturbations), without the presence of running is usually used to tes... |
2303.12251 | Juan Carlos Del \'Aguila Rodr\'iguez | Juan Carlos Del \'Aguila, Tonatiuh Matos | Geodesic completeness of a ring wormhole | 16 pages, 6 figures. Accepted for publication in Physical Review D | Phys. Rev. D 107, 064047 (2023) | 10.1103/PhysRevD.107.064047 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work the possible geodesic completeness of an electromagnetic dipole
wormhole is studied in detail. The space-time contains a curvature singularity
and belongs to a class of solutions to the Einstein-Maxwell equations with a
coupled scalar field. Specifically, a numerical analysis is performed to
examine cong... | [
{
"created": "Wed, 22 Mar 2023 01:29:59 GMT",
"version": "v1"
}
] | 2023-03-23 | [
[
"Del Águila",
"Juan Carlos",
""
],
[
"Matos",
"Tonatiuh",
""
]
] | In this work the possible geodesic completeness of an electromagnetic dipole wormhole is studied in detail. The space-time contains a curvature singularity and belongs to a class of solutions to the Einstein-Maxwell equations with a coupled scalar field. Specifically, a numerical analysis is performed to examine congru... |
1309.7808 | Pedro Montero | Pedro J. Montero, Thomas W. Baumgarte and Ewald M\"uller | General relativistic hydrodynamics in curvilinear coordinates | 14 pages, 8 figures, version to be published in PRD | null | 10.1103/PhysRevD.89.084043 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we report on what we believe is the first successful
implementation of relativistic hydrodynamics, coupled to dynamical spacetimes,
in spherical polar coordinates without symmetry assumptions. We employ a
high-resolution shock-capturing scheme, which requires that the equations be
cast in flux-conservat... | [
{
"created": "Mon, 30 Sep 2013 12:06:58 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Mar 2014 14:33:48 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Montero",
"Pedro J.",
""
],
[
"Baumgarte",
"Thomas W.",
""
],
[
"Müller",
"Ewald",
""
]
] | In this paper we report on what we believe is the first successful implementation of relativistic hydrodynamics, coupled to dynamical spacetimes, in spherical polar coordinates without symmetry assumptions. We employ a high-resolution shock-capturing scheme, which requires that the equations be cast in flux-conservativ... |
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