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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0705.3829 | Deirdre Shoemaker | Birjoo Vaishnav, Ian Hinder, Frank Herrmann, Deirdre Shoemaker | Matched Filtering of Numerical Relativity Templates of Spinning Binary
Black Holes | null | Phys.Rev.D76:084020,2007 | 10.1103/PhysRevD.76.084020 | null | gr-qc astro-ph | null | Tremendous progress has been made towards the solution of the
binary-black-hole problem in numerical relativity. The waveforms produced by
numerical relativity will play a role in gravitational wave detection as either
test-beds for analytic template banks or as template banks themselves. As the
parameter space explo... | [
{
"created": "Fri, 25 May 2007 18:57:53 GMT",
"version": "v1"
},
{
"created": "Sun, 27 May 2007 18:36:30 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Vaishnav",
"Birjoo",
""
],
[
"Hinder",
"Ian",
""
],
[
"Herrmann",
"Frank",
""
],
[
"Shoemaker",
"Deirdre",
""
]
] | Tremendous progress has been made towards the solution of the binary-black-hole problem in numerical relativity. The waveforms produced by numerical relativity will play a role in gravitational wave detection as either test-beds for analytic template banks or as template banks themselves. As the parameter space explore... |
1006.5412 | Anil Yadav dr | Anil Kumar Yadav, Farook Rahaman and Saibal Ray | Dark energy models with variable equation of state parameter | 8 pages, 6 figures | Int.J.Theor.Phys.50:871-881,2011 | 10.1007/s10773-010-0628-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dark energy models with variable equation of state parameter $\omega$ is
investigated by using law of variation of Hubble's parameter that yields the
constant value of deceleration parameter. The equation of state parameter
$\omega$ is found to be time dependent and its existing range for this model is
consistent... | [
{
"created": "Mon, 28 Jun 2010 17:18:55 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Sep 2010 16:29:05 GMT",
"version": "v2"
}
] | 2011-02-01 | [
[
"Yadav",
"Anil Kumar",
""
],
[
"Rahaman",
"Farook",
""
],
[
"Ray",
"Saibal",
""
]
] | The dark energy models with variable equation of state parameter $\omega$ is investigated by using law of variation of Hubble's parameter that yields the constant value of deceleration parameter. The equation of state parameter $\omega$ is found to be time dependent and its existing range for this model is consistent w... |
2401.15809 | Arthur Garnier | Arthur Garnier | Particle dynamics in spherically symmetric electro-vacuum instantons | null | null | 10.1140/epjc/s10052-024-12719-4 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we study the geodesic motion in spherically symmetric
electro-vacuum Euclidean solutions of the Einstein equation. There are two
kinds of such solutions: the Euclidean Reissner-Nordstr\"{o}m (ERN) metrics,
and the Bertotti-Robinson-like (BR) metrics, the latter having constant
Kretschmann scalar. First... | [
{
"created": "Mon, 29 Jan 2024 00:12:32 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Apr 2024 15:53:19 GMT",
"version": "v2"
}
] | 2024-04-17 | [
[
"Garnier",
"Arthur",
""
]
] | In this paper, we study the geodesic motion in spherically symmetric electro-vacuum Euclidean solutions of the Einstein equation. There are two kinds of such solutions: the Euclidean Reissner-Nordstr\"{o}m (ERN) metrics, and the Bertotti-Robinson-like (BR) metrics, the latter having constant Kretschmann scalar. First, ... |
2110.12941 | Alejandro Torres Forn\'e | Ainara Saiz-P\'erez, Alejandro Torres-Forn\'e, and Jos\'e A. Font | Classification of the core-collapse supernova explosion mechanism with
learned dictionaries | null | null | 10.1093/mnras/stac698 | null | gr-qc astro-ph.HE astro-ph.IM astro-ph.SR | http://creativecommons.org/licenses/by/4.0/ | Core-collapse supernovae (CCSN) are a prime source of gravitational waves.
Estimations of their typical frequencies make them perfect targets for the
current network of advanced, ground-based detectors. A successful detection
could potentially reveal the underlying explosion mechanism through the
analysis of the wave... | [
{
"created": "Mon, 25 Oct 2021 13:22:08 GMT",
"version": "v1"
}
] | 2022-03-30 | [
[
"Saiz-Pérez",
"Ainara",
""
],
[
"Torres-Forné",
"Alejandro",
""
],
[
"Font",
"José A.",
""
]
] | Core-collapse supernovae (CCSN) are a prime source of gravitational waves. Estimations of their typical frequencies make them perfect targets for the current network of advanced, ground-based detectors. A successful detection could potentially reveal the underlying explosion mechanism through the analysis of the wavefo... |
2206.02813 | Alexandre Pombo | Carlos A.R. Herdeiro, Jo\~ao M.S. Oliveira, Alexandre M. Pombo, Eugen
Radu | Deconstructing scaling virial identities in General Relativity:
spherical symmetry and beyond | 14 pages | null | 10.1103/PhysRevD.106.024054 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Derrick-type virial identities, obtained via dilatation (scaling) arguments,
have a variety of applications in field theories. We deconstruct such virial
identities in relativistic gravity showing how they can be recast as
self-evident integrals of appropriate combinations of the equations of motion.
In spherical sym... | [
{
"created": "Mon, 6 Jun 2022 18:00:03 GMT",
"version": "v1"
}
] | 2022-08-17 | [
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Oliveira",
"João M. S.",
""
],
[
"Pombo",
"Alexandre M.",
""
],
[
"Radu",
"Eugen",
""
]
] | Derrick-type virial identities, obtained via dilatation (scaling) arguments, have a variety of applications in field theories. We deconstruct such virial identities in relativistic gravity showing how they can be recast as self-evident integrals of appropriate combinations of the equations of motion. In spherical symme... |
gr-qc/0605122 | Ilia Musco | Alexander G. Polnarev (1), Ilia Musco (1). ((1)Astronomy Unit, Queen
Mary University of London) | Curvature profiles as initial conditions for primordial black hole
formation | 31 pages, submitted to Class. Quant. Grav. In this version many
changes: new results and discussions | Class.Quant.Grav.24:1405-1432,2007 | 10.1088/0264-9381/24/6/003 | null | gr-qc | null | This work is part of an ongoing research programme to study possible
Primordial Black Hole (PBH) formation during the radiation dominated era of the
early universe. Working within spherical symmetry, we specify an initial
configuration in terms of a curvature profile, which represents initial
conditions for the large... | [
{
"created": "Wed, 24 May 2006 18:00:09 GMT",
"version": "v1"
},
{
"created": "Thu, 25 May 2006 19:55:26 GMT",
"version": "v2"
},
{
"created": "Tue, 30 May 2006 19:22:31 GMT",
"version": "v3"
},
{
"created": "Sun, 16 Jul 2006 22:03:51 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Polnarev",
"Alexander G.",
""
],
[
"Musco",
"Ilia",
""
],
[
".",
"",
""
]
] | This work is part of an ongoing research programme to study possible Primordial Black Hole (PBH) formation during the radiation dominated era of the early universe. Working within spherical symmetry, we specify an initial configuration in terms of a curvature profile, which represents initial conditions for the large a... |
2010.12677 | Mu-Tao Wang | Mu-Tao Wang | Quasi-local mass and isometric embedding with reference to a static
spacetime | to appear in Advanced Studies in Pure Mathematics 85, 2020, The Role
of Metrics in the Theory of Partial Differential Equations | null | null | null | gr-qc math-ph math.AP math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The mathematical theory of isometric embedding is applied to study the notion
of quasilocal mass in general relativity. In particular, I shall report some
recent progress of quasilocal mass with reference to a cosmological spacetime,
such as the de Sitter or the Anti-de Sitter spacetime, or a blackhole
spacetime, suc... | [
{
"created": "Fri, 23 Oct 2020 21:30:22 GMT",
"version": "v1"
}
] | 2020-10-27 | [
[
"Wang",
"Mu-Tao",
""
]
] | The mathematical theory of isometric embedding is applied to study the notion of quasilocal mass in general relativity. In particular, I shall report some recent progress of quasilocal mass with reference to a cosmological spacetime, such as the de Sitter or the Anti-de Sitter spacetime, or a blackhole spacetime, such ... |
1307.6265 | Yun Soo Myung | Yun Soo Myung | Comment on Ricci dark energy in Chern-Simons modified gravity | 7 pages, 2 figures, version to appear in EPJC | null | 10.1140/epjc/s10052-013-2515-6 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit Ricci dark energy in Chern-Simons modified gravity. As far as the
cosmological evolution, this is nothing but the Ricci dark energy with a
minimally coupled scalar without potential which means that the role of
Chern-Simons term is suppressed. Using the equation of state parameter, this
model is similar to... | [
{
"created": "Tue, 23 Jul 2013 23:13:34 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Myung",
"Yun Soo",
""
]
] | We revisit Ricci dark energy in Chern-Simons modified gravity. As far as the cosmological evolution, this is nothing but the Ricci dark energy with a minimally coupled scalar without potential which means that the role of Chern-Simons term is suppressed. Using the equation of state parameter, this model is similar to t... |
gr-qc/0509113 | Sigbjorn Hervik | Alan Coley, Sigbjorn Hervik, Nicos Pelavas | On Spacetimes with Constant Scalar Invariants | 25 pages, 1 figure, v2: minor changes throughout | Class.Quant.Grav.23:3053-3074,2006 | 10.1088/0264-9381/23/9/018 | null | gr-qc hep-th math-ph math.MP | null | We study Lorentzian spacetimes for which all scalar invariants constructed
from the Riemann tensor and its covariant derivatives are constant ($CSI$
spacetimes). We obtain a number of general results in arbitrary dimensions. We
study and construct warped product $CSI$ spacetimes and higher-dimensional
Kundt $CSI$ spa... | [
{
"created": "Wed, 28 Sep 2005 16:44:29 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Apr 2006 16:20:35 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Coley",
"Alan",
""
],
[
"Hervik",
"Sigbjorn",
""
],
[
"Pelavas",
"Nicos",
""
]
] | We study Lorentzian spacetimes for which all scalar invariants constructed from the Riemann tensor and its covariant derivatives are constant ($CSI$ spacetimes). We obtain a number of general results in arbitrary dimensions. We study and construct warped product $CSI$ spacetimes and higher-dimensional Kundt $CSI$ space... |
0907.1311 | Dennis Bessada | Dennis Bessada, William H. Kinney, Konstantinos Tzirakis | Inflationary potentials in DBI models | Minor changes, reference added. Version submitted to JCAP | JCAP 0909:031,2009 | 10.1088/1475-7516/2009/09/031 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study DBI inflation based upon a general model characterized by a
power-law flow parameter $\epsilon(\phi)\propto\phi^{\alpha}$ and speed of
sound $c_s(\phi)\propto\phi^{\beta}$, where $\alpha$ and $\beta$ are constants.
We show that in the slow-roll limit this general model gives rise to distinct
inflationary cla... | [
{
"created": "Tue, 7 Jul 2009 22:12:54 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Aug 2009 17:22:02 GMT",
"version": "v2"
}
] | 2009-10-02 | [
[
"Bessada",
"Dennis",
""
],
[
"Kinney",
"William H.",
""
],
[
"Tzirakis",
"Konstantinos",
""
]
] | We study DBI inflation based upon a general model characterized by a power-law flow parameter $\epsilon(\phi)\propto\phi^{\alpha}$ and speed of sound $c_s(\phi)\propto\phi^{\beta}$, where $\alpha$ and $\beta$ are constants. We show that in the slow-roll limit this general model gives rise to distinct inflationary class... |
2201.11804 | Mikhail Khlopunov | M. Khlopunov, D. V. Gal'tsov | Gravitational radiation from a binary system in odd-dimensional
spacetime | 47 pages, 1 figure | null | 10.1088/1475-7516/2022/04/014 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We explore possible manifestations of an odd number of extra dimensions in
gravitational radiation, which are associated with violation of Huygens'
principle in flat odd-dimensional spacetime. Our setup can be regarded as the
limit of an infinite compactification radius in ADD model and is not viable as
realistic cos... | [
{
"created": "Thu, 27 Jan 2022 20:50:43 GMT",
"version": "v1"
}
] | 2022-04-20 | [
[
"Khlopunov",
"M.",
""
],
[
"Gal'tsov",
"D. V.",
""
]
] | We explore possible manifestations of an odd number of extra dimensions in gravitational radiation, which are associated with violation of Huygens' principle in flat odd-dimensional spacetime. Our setup can be regarded as the limit of an infinite compactification radius in ADD model and is not viable as realistic cosmo... |
gr-qc/0206020 | Fay Dowker | Fay Dowker | Topology change in quantum gravity | LaTeX, 18 pages. Contribution to the proceedings of the Stephen
Hawking 60th birthday conference, Cambridge, January 2002 | null | null | null | gr-qc hep-th | null | A particular approach to topology change in quantum gravity is reviewed,
showing that several aspects of Stephen's work are intertwined with it in an
essential way. Speculations are made on possible implications for the causal
set approach to quantum gravity.
| [
{
"created": "Fri, 7 Jun 2002 11:31:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dowker",
"Fay",
""
]
] | A particular approach to topology change in quantum gravity is reviewed, showing that several aspects of Stephen's work are intertwined with it in an essential way. Speculations are made on possible implications for the causal set approach to quantum gravity. |
2206.04608 | Gerard Hooft 't | Gerard t Hooft | Quantum clones inside black holes | 16 pages (incl. title page), 1 figure | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | A systematic procedure is proposed for better understanding the evolution
laws of black holes in terms of pure quantum states. We start with the two
opposed regions I and II in the Penrose diagram, and study the evolution of
matter in these regions, using the algebra derived earlier from the Shapiro
effect in quantum... | [
{
"created": "Thu, 9 Jun 2022 16:55:54 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Jun 2022 10:14:22 GMT",
"version": "v2"
},
{
"created": "Fri, 22 Jul 2022 16:48:43 GMT",
"version": "v3"
},
{
"created": "Thu, 8 Sep 2022 12:12:18 GMT",
"version": "v4"
}
] | 2022-09-09 | [
[
"Hooft",
"Gerard t",
""
]
] | A systematic procedure is proposed for better understanding the evolution laws of black holes in terms of pure quantum states. We start with the two opposed regions I and II in the Penrose diagram, and study the evolution of matter in these regions, using the algebra derived earlier from the Shapiro effect in quantum p... |
gr-qc/9703047 | Peter Breitenlohner | Peter Breitenlohner (1), George Lavrelashvili (2) and Dieter Maison
(1) ((1) Max-Planck-Institut f\"ur Physik - Werner Heisenberg Institut -
Munich, (2) Institute for Theoretical Physics, University of Bern) | Mass inflation and chaotic behaviour inside hairy black holes | 22 pages, Latex, 5 figures (8 eps files) | Nucl.Phys.B524:427-443,1998 | 10.1016/S0550-3213(98)00177-1 | MPI-PhT/97-20 and BUTP-97/08 | gr-qc hep-th | null | We analyze the interior geometry of static, spherically symmetric black holes
of the Einstein-Yang-Mills-Higgs theory. Generically the solutions exhibit a
behaviour that may be described as ``mass inflation'', although with a
remarkable difference between the cases with and without a Higgs field. Without
Higgs field ... | [
{
"created": "Tue, 18 Mar 1997 17:21:29 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Breitenlohner",
"Peter",
""
],
[
"Lavrelashvili",
"George",
""
],
[
"Maison",
"Dieter",
""
]
] | We analyze the interior geometry of static, spherically symmetric black holes of the Einstein-Yang-Mills-Higgs theory. Generically the solutions exhibit a behaviour that may be described as ``mass inflation'', although with a remarkable difference between the cases with and without a Higgs field. Without Higgs field th... |
2201.00027 | Niayesh Afshordi | Randy S. Conklin, Niayesh Afshordi | Boltzmann Meets Lorentz: A Surrogate Model for Black Hole Echoes | 19 pages, 29 figures, comments are welcome | null | null | null | gr-qc astro-ph.CO astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | The existence of black hole horizons has not been strictly proven
observationally, and indeed it may not be possible to do so. However,
alternatives may be established by the observation of gravitational wave echoes
that probe possible near-horizon structure. These echoes are proposed to be
generated in exotic compac... | [
{
"created": "Fri, 31 Dec 2021 19:02:12 GMT",
"version": "v1"
}
] | 2022-01-04 | [
[
"Conklin",
"Randy S.",
""
],
[
"Afshordi",
"Niayesh",
""
]
] | The existence of black hole horizons has not been strictly proven observationally, and indeed it may not be possible to do so. However, alternatives may be established by the observation of gravitational wave echoes that probe possible near-horizon structure. These echoes are proposed to be generated in exotic compact ... |
gr-qc/0701109 | Bruno Giacomazzo | B. Giacomazzo (1,2) and L. Rezzolla (1,3) ((1) Albert Einstein
Institute, Golm, Germany, (2) SISSA and INFN, Trieste, Italy, (3) Department
of Physics, Louisiana State University, USA) | WhiskyMHD: a new numerical code for general relativistic
magnetohydrodynamics | minor changes to match the published version | Class.Quant.Grav.24:S235-S258,2007 | 10.1088/0264-9381/24/12/S16 | null | gr-qc astro-ph | null | The accurate modelling of astrophysical scenarios involving compact objects
and magnetic fields, such as the collapse of rotating magnetized stars to black
holes or the phenomenology of gamma-ray bursts, requires the solution of the
Einstein equations together with those of general-relativistic
magnetohydrodynamics. ... | [
{
"created": "Fri, 19 Jan 2007 19:25:03 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jun 2007 09:17:57 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Giacomazzo",
"B.",
""
],
[
"Rezzolla",
"L.",
""
]
] | The accurate modelling of astrophysical scenarios involving compact objects and magnetic fields, such as the collapse of rotating magnetized stars to black holes or the phenomenology of gamma-ray bursts, requires the solution of the Einstein equations together with those of general-relativistic magnetohydrodynamics. We... |
1905.03237 | Rafael Nunes | Rafael C. Nunes, Marcio E. S. Alves, Jose C. N. de Araujo | Forecast constraints on $f(T)$ gravity with gravitational waves from
compact binary coalescences | 13 pages, 9 captioned figures. Version published in PRD | Phys. Rev. D 100, 064012 (2019) | 10.1103/PhysRevD.100.064012 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The direct detection of gravitational waves (GWs) opened a new chapter in the
modern cosmology to probe possible deviations from the general relativity (GR)
theory. In the present work, we investigate for the first time the modified GW
form propagation from the inspiraling of compact binary systems within the
context... | [
{
"created": "Wed, 8 May 2019 17:50:16 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Sep 2019 15:06:03 GMT",
"version": "v2"
}
] | 2019-09-16 | [
[
"Nunes",
"Rafael C.",
""
],
[
"Alves",
"Marcio E. S.",
""
],
[
"de Araujo",
"Jose C. N.",
""
]
] | The direct detection of gravitational waves (GWs) opened a new chapter in the modern cosmology to probe possible deviations from the general relativity (GR) theory. In the present work, we investigate for the first time the modified GW form propagation from the inspiraling of compact binary systems within the context o... |
gr-qc/0511097 | Andrew DeBenedictis | A. DeBenedictis, D. Horvat, S. Ilijic, S. Kloster, K. S. Viswanathan | Gravastar Solutions with Continuous Pressures and Equation of State | 19 pages, 9 figures. Latest version contains new and updated
references along with some clarifying remarks in the stability analysis | Class.Quant.Grav. 23 (2006) 2303-2316 | 10.1088/0264-9381/23/7/007 | null | gr-qc astro-ph hep-th | null | We study the gravitational vacuum star (gravastar) configuration as proposed
by other authors in a model where the interior de Sitter spacetime segment is
continuously extended to the exterior Schwarzschild spacetime. The multilayered
structure in previous papers is replaced by a continuous stress-energy tensor
at th... | [
{
"created": "Thu, 17 Nov 2005 03:26:41 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Feb 2006 20:48:48 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Jun 2007 16:18:29 GMT",
"version": "v3"
}
] | 2007-06-19 | [
[
"DeBenedictis",
"A.",
""
],
[
"Horvat",
"D.",
""
],
[
"Ilijic",
"S.",
""
],
[
"Kloster",
"S.",
""
],
[
"Viswanathan",
"K. S.",
""
]
] | We study the gravitational vacuum star (gravastar) configuration as proposed by other authors in a model where the interior de Sitter spacetime segment is continuously extended to the exterior Schwarzschild spacetime. The multilayered structure in previous papers is replaced by a continuous stress-energy tensor at the ... |
2103.06667 | Yan-Gang Miao | Xin-Chang Cai, Yan-Gang Miao | Connections between entropy surface density and microscopic property in
black holes | v1: 16 pages, 7 figures; v2: clarifications added and typos corrected | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a new microscopic quantity $\varepsilon $ that describes the
contribution of a single black hole molecule to black hole entropy and give a
key relation that this microscopic quantity is proportional to the macroscopic
quantity -- entropy surface density $\sigma_{S}$, thus connecting a microscopic
quantit... | [
{
"created": "Thu, 11 Mar 2021 13:45:31 GMT",
"version": "v1"
},
{
"created": "Sat, 27 Mar 2021 10:34:16 GMT",
"version": "v2"
}
] | 2021-03-30 | [
[
"Cai",
"Xin-Chang",
""
],
[
"Miao",
"Yan-Gang",
""
]
] | We introduce a new microscopic quantity $\varepsilon $ that describes the contribution of a single black hole molecule to black hole entropy and give a key relation that this microscopic quantity is proportional to the macroscopic quantity -- entropy surface density $\sigma_{S}$, thus connecting a microscopic quantity ... |
gr-qc/0608133 | Detlev Buchholz | Detlev Buchholz and Jan Schlemmer | Local Temperature in Curved Spacetime | 9 pages, no figures; minor changes in the exposition; version as to
appear in CQG | Class.Quant.Grav.24:F25-F31,2007 | 10.1088/0264-9381/24/7/F01 | null | gr-qc hep-th | null | A physically meaningful local concept of temperature is introduced in quantum
field theory on curved spacetime and applied to the example of a massless field
on de Sitter space. It turns out in this model that the equilibrium (Gibbs)
states which can be prepared by a geodesic observer have in general a varying
temper... | [
{
"created": "Wed, 30 Aug 2006 16:44:31 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Mar 2007 12:52:09 GMT",
"version": "v2"
}
] | 2010-11-02 | [
[
"Buchholz",
"Detlev",
""
],
[
"Schlemmer",
"Jan",
""
]
] | A physically meaningful local concept of temperature is introduced in quantum field theory on curved spacetime and applied to the example of a massless field on de Sitter space. It turns out in this model that the equilibrium (Gibbs) states which can be prepared by a geodesic observer have in general a varying temperat... |
1110.3288 | Cristhian Said Osorio Mayor | H. I. Arcos, C. S. O. Mayor, G. Otalora and J. G. Pereira | Spin-2 fields and helicity | 10 pages. V2: presentation changes and discussion added | Foundations of Physics, Volume 42, Number 10 (2012), 1339-1349 | 10.1007/s10701-012-9670-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By considering the irreducible representations of the Lorentz group, an
analysis of the different spin-2 waves is presented. In particular, the
question of the helicity is discussed. It is concluded that, although from the
point of view of representation theory there are no compelling reasons to
choose between spin-2... | [
{
"created": "Fri, 14 Oct 2011 18:29:33 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Sep 2012 20:38:58 GMT",
"version": "v2"
}
] | 2012-09-05 | [
[
"Arcos",
"H. I.",
""
],
[
"Mayor",
"C. S. O.",
""
],
[
"Otalora",
"G.",
""
],
[
"Pereira",
"J. G.",
""
]
] | By considering the irreducible representations of the Lorentz group, an analysis of the different spin-2 waves is presented. In particular, the question of the helicity is discussed. It is concluded that, although from the point of view of representation theory there are no compelling reasons to choose between spin-2 w... |
0801.4702 | Adolfo De Un\'anue | Adolfo De Un\'anue (1), Daniel Sudarsky (1) ((1) Instituto de Ciencias
Nucleares, Universidad Nacional Autonoma de Mexico, Ciudad de Mexico, Mexico) | Phenomenological analysis of quantum collapse as source of the seeds of
cosmic structure | 18 pages, 9 figures | Phys.Rev.D78:043510,2008 | 10.1103/PhysRevD.78.043510 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/3.0/ | The standard inflationary version of the origin of the cosmic structure as
the result of the quantum fluctuations during the early universe is less than
fully satisfactory as has been argued in [A. Perez, H. Sahlmann, and D.
Sudarsky, Class. Quantum Grav., 23, 2317, (2006)]. A proposal is made there of
a way to addre... | [
{
"created": "Wed, 30 Jan 2008 16:03:24 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Aug 2008 06:51:28 GMT",
"version": "v2"
}
] | 2012-05-30 | [
[
"De Unánue",
"Adolfo",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | The standard inflationary version of the origin of the cosmic structure as the result of the quantum fluctuations during the early universe is less than fully satisfactory as has been argued in [A. Perez, H. Sahlmann, and D. Sudarsky, Class. Quantum Grav., 23, 2317, (2006)]. A proposal is made there of a way to address... |
1206.3015 | Luisa T. Buchman | Luisa T. Buchman, Harald P. Pfeiffer, Mark A. Scheel, and Bela
Szilagyi | Simulations of non-equal mass black hole binaries with spectral methods | corresponds to final published version | null | 10.1103/PhysRevD.86.084033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents techniques and results for simulations of unequal mass,
non-spinning black hole binaries with pseudo-spectral methods. Specifically, we
develop an efficient root-finding procedure to ensure the black hole initial
data have the desired masses and spins, we extend the dual coordinate frame
method an... | [
{
"created": "Thu, 14 Jun 2012 06:16:36 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Oct 2012 00:55:40 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Buchman",
"Luisa T.",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Szilagyi",
"Bela",
""
]
] | This paper presents techniques and results for simulations of unequal mass, non-spinning black hole binaries with pseudo-spectral methods. Specifically, we develop an efficient root-finding procedure to ensure the black hole initial data have the desired masses and spins, we extend the dual coordinate frame method and ... |
gr-qc/0111001 | Leor Barack | Leor Barack, Yasushi Mino, Hiroyuki Nakano, Amos Ori, and Misao Sasaki | Calculating the gravitational self force in Schwarzschild spacetime | Final publication version. Note corrections to Eqs. (13-15) | Phys.Rev.Lett.88:091101,2002 | 10.1103/PhysRevLett.88.091101 | null | gr-qc | null | We present a practical method for calculating the local gravitational
self-force (often called ``radiation-reaction force'') for a pointlike particle
orbiting a Schwarzschild black hole. This is an implementation of the method of
{\it mode-sum regularization}, in which one first calculates the (finite)
contribution t... | [
{
"created": "Thu, 1 Nov 2001 19:11:00 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Jan 2002 15:03:19 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Feb 2002 14:44:15 GMT",
"version": "v3"
}
] | 2009-10-09 | [
[
"Barack",
"Leor",
""
],
[
"Mino",
"Yasushi",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Ori",
"Amos",
""
],
[
"Sasaki",
"Misao",
""
]
] | We present a practical method for calculating the local gravitational self-force (often called ``radiation-reaction force'') for a pointlike particle orbiting a Schwarzschild black hole. This is an implementation of the method of {\it mode-sum regularization}, in which one first calculates the (finite) contribution to ... |
1502.02985 | Andrea Maselli | Irene Milillo, Daniele Bertacca, Marco Bruni and Andrea Maselli | The missing link: a nonlinear post-Friedmann framework for small and
large scales | Small changes to match the version to appear on PRD | null | 10.1103/PhysRevD.92.023519 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a nonlinear post-Friedmann framework for structure formation,
generalizing to cosmology the weak-field (post-Minkowskian) approximation,
unifying the treatment of small and large scales. We consider a universe filled
with a pressureless fluid and a cosmological constant $\Lambda$, the theory of
gravity is ... | [
{
"created": "Tue, 10 Feb 2015 16:55:12 GMT",
"version": "v1"
},
{
"created": "Sat, 9 May 2015 18:28:25 GMT",
"version": "v2"
}
] | 2015-08-06 | [
[
"Milillo",
"Irene",
""
],
[
"Bertacca",
"Daniele",
""
],
[
"Bruni",
"Marco",
""
],
[
"Maselli",
"Andrea",
""
]
] | We present a nonlinear post-Friedmann framework for structure formation, generalizing to cosmology the weak-field (post-Minkowskian) approximation, unifying the treatment of small and large scales. We consider a universe filled with a pressureless fluid and a cosmological constant $\Lambda$, the theory of gravity is Ei... |
1708.07874 | Hamid Shabani | Hamid Shabani and Amir Hadi Ziaie | Bouncing cosmological solutions from f(R,T) gravity | 49 pages, 11 figures, one table | Eur. Phys. J. C 78:397 (2018) | 10.1140/epjc/s10052-018-5886-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study classical bouncing solutions in the context of $f({\sf
R},{\sf T})={\sf R}+h({\sf T})$ gravity in a flat {\sf FLRW} background using a
perfect fluid as the only matter content. Our investigation is based on
introducing an effective fluid through defining effective energy density and
pressure; we... | [
{
"created": "Fri, 25 Aug 2017 20:17:49 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Nov 2017 09:22:14 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Jan 2018 07:02:15 GMT",
"version": "v3"
},
{
"created": "Thu, 25 Jan 2018 21:04:55 GMT",
"version": "v4"
},
{
"cre... | 2018-06-05 | [
[
"Shabani",
"Hamid",
""
],
[
"Ziaie",
"Amir Hadi",
""
]
] | In this work we study classical bouncing solutions in the context of $f({\sf R},{\sf T})={\sf R}+h({\sf T})$ gravity in a flat {\sf FLRW} background using a perfect fluid as the only matter content. Our investigation is based on introducing an effective fluid through defining effective energy density and pressure; we c... |
1502.01945 | Volker Perlick | Jonathan Gratus, Volker Perlick, Robin W.Tucker | On the self-force in Bopp-Podolsky electrodynamics | 30 pages, 6 figures; minor reformulations, some figures changed,
additional explanations added | J. Phys. A: Math. Theor. 48, 435401 (2015) | 10.1088/1751-8113/48/43/435401 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the classical vacuum Maxwell-Lorentz theory the self-force of a charged
point particle is infinite. This makes classical mass renormalization necessary
and, in the special relativistic domain, leads to the Abraham-Lorentz-Dirac
equation of motion possessing unphysical run-away and pre-acceleration
solutions. In th... | [
{
"created": "Fri, 6 Feb 2015 16:40:43 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Oct 2015 14:35:10 GMT",
"version": "v2"
}
] | 2015-10-12 | [
[
"Gratus",
"Jonathan",
""
],
[
"Perlick",
"Volker",
""
],
[
"Tucker",
"Robin W.",
""
]
] | In the classical vacuum Maxwell-Lorentz theory the self-force of a charged point particle is infinite. This makes classical mass renormalization necessary and, in the special relativistic domain, leads to the Abraham-Lorentz-Dirac equation of motion possessing unphysical run-away and pre-acceleration solutions. In this... |
2408.01644 | Leandro Gomes G | Leandro G. Gomes, Marcelo A. C. Nogueira and Lucas Ruiz dos Santos | Einstein's equations constrained by homogeneous and isotropic expansion:
Initial value problems and applications | 18 pages; 3 figures | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | In this manuscript, we put forth a general scheme for defining initial value
problems from Einstein's equations of General Relativity constrained by
homogeneous and isotropic expansion. The cosmological models arising as
solutions are naturally interpreted as spatially homogeneous and isotropic on
``large scales". In... | [
{
"created": "Sat, 3 Aug 2024 03:02:49 GMT",
"version": "v1"
}
] | 2024-08-06 | [
[
"Gomes",
"Leandro G.",
""
],
[
"Nogueira",
"Marcelo A. C.",
""
],
[
"Santos",
"Lucas Ruiz dos",
""
]
] | In this manuscript, we put forth a general scheme for defining initial value problems from Einstein's equations of General Relativity constrained by homogeneous and isotropic expansion. The cosmological models arising as solutions are naturally interpreted as spatially homogeneous and isotropic on ``large scales". In o... |
1101.0386 | Ujjal Debnath | Prabir Rudra, Ritabrata Biswas and Ujjal Debnath | Gravitational Collapse in Generalized Vaidya Space-Time for Lovelock
Gravity Theory | 11 pages | Astrophys.Space Sci.335:505-513,2011 | 10.1007/s10509-011-0759-x | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we have assumed the generalized Vaidya solution in Lovelock
theory of gravity in $(n+2)$-dimensions. It has been shown that Gauss-Bonnet
gravity, dimensionally continued Lovelock gravity and pure Lovelock gravity can
be constructed by suitable choice of parameters. We have investigated the
occurrence of... | [
{
"created": "Sun, 2 Jan 2011 05:17:34 GMT",
"version": "v1"
},
{
"created": "Sun, 17 Apr 2011 09:30:49 GMT",
"version": "v2"
}
] | 2011-09-12 | [
[
"Rudra",
"Prabir",
""
],
[
"Biswas",
"Ritabrata",
""
],
[
"Debnath",
"Ujjal",
""
]
] | In this work, we have assumed the generalized Vaidya solution in Lovelock theory of gravity in $(n+2)$-dimensions. It has been shown that Gauss-Bonnet gravity, dimensionally continued Lovelock gravity and pure Lovelock gravity can be constructed by suitable choice of parameters. We have investigated the occurrence of s... |
1009.4793 | Boris E. Meierovich | Boris E. Meierovich | Vector order parameter in general relativity. Covariant equations | null | Phys.Rev.D82:024004,2010 | 10.1103/PhysRevD.82.024004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Phase transitions with spontaneous symmetry breaking and vector order
parameter are considered in multidimensional theory of general relativity.
Covariant equations, describing the gravitational properties of topological
defects, are derived. The topological defects are classified in accordance with
the symmetry of t... | [
{
"created": "Fri, 24 Sep 2010 10:17:48 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Meierovich",
"Boris E.",
""
]
] | Phase transitions with spontaneous symmetry breaking and vector order parameter are considered in multidimensional theory of general relativity. Covariant equations, describing the gravitational properties of topological defects, are derived. The topological defects are classified in accordance with the symmetry of the... |
gr-qc/0301130 | Karlucio Castello Branco | E. Abdalla, K. H. C. Castello-Branco and A. Lima-Santos | Area Quantization in Quasi-Extreme Black Holes | Final version to appear in Mod. Phys. Lett. A | Mod.Phys.Lett. A18 (2003) 1435-1440 | 10.1142/S0217732303011435 | null | gr-qc | null | We consider quasi-extreme Kerr and quasi-extreme Schwarzschild-de Sitter
black holes. From the known analytical expressions obtained for their
quasi-normal modes frequencies, we suggest an area quantization prescription
for those objects.
| [
{
"created": "Fri, 31 Jan 2003 20:42:36 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Feb 2003 18:28:18 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Feb 2003 14:03:46 GMT",
"version": "v3"
},
{
"created": "Thu, 5 Jun 2003 17:58:30 GMT",
"version": "v4"
}
] | 2009-11-10 | [
[
"Abdalla",
"E.",
""
],
[
"Castello-Branco",
"K. H. C.",
""
],
[
"Lima-Santos",
"A.",
""
]
] | We consider quasi-extreme Kerr and quasi-extreme Schwarzschild-de Sitter black holes. From the known analytical expressions obtained for their quasi-normal modes frequencies, we suggest an area quantization prescription for those objects. |
1402.4434 | Vladim\'ir Balek | Vladim\'ir Balek, Matej \v{S}kovran | Effect of radiation-like solid on CMB anisotropies | 24 pages, 3 figures | Class. Quant. Grav. 32, 015015 (2015) | 10.1088/0264-9381/32/1/015015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the power in the lowest multipoles of CMB anisotropies in the
presence of radiation-like solid, a hypothetical new kind of radiation with
nonzero shear modulus. If only the ordinary Sachs-Wolfe effect is taken into
account, the shear modulus to energy density ratio must be in absolute value of
order $10^{-... | [
{
"created": "Tue, 18 Feb 2014 18:40:22 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Jan 2015 22:04:42 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Balek",
"Vladimír",
""
],
[
"Škovran",
"Matej",
""
]
] | We compute the power in the lowest multipoles of CMB anisotropies in the presence of radiation-like solid, a hypothetical new kind of radiation with nonzero shear modulus. If only the ordinary Sachs-Wolfe effect is taken into account, the shear modulus to energy density ratio must be in absolute value of order $10^{-5}... |
2309.05420 | Bhaskar Biswas | Bhaskar Biswas, Evangelos Smyrniotis, Ioannis Liodis, and Nikolaos
Stergioulas | A Bayesian investigation of the neutron star equation-of-state vs.
gravity degeneracy | Comments are welcome! | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Despite its elegance, the theory of General Relativity is subject to
experimental, observational, and theoretical scrutiny to arrive at tighter
constraints or an alternative, more preferred theory. In alternative gravity
theories, the macroscopic properties of neutron stars, such as mass, radius,
tidal deformability,... | [
{
"created": "Mon, 11 Sep 2023 12:40:26 GMT",
"version": "v1"
}
] | 2023-09-12 | [
[
"Biswas",
"Bhaskar",
""
],
[
"Smyrniotis",
"Evangelos",
""
],
[
"Liodis",
"Ioannis",
""
],
[
"Stergioulas",
"Nikolaos",
""
]
] | Despite its elegance, the theory of General Relativity is subject to experimental, observational, and theoretical scrutiny to arrive at tighter constraints or an alternative, more preferred theory. In alternative gravity theories, the macroscopic properties of neutron stars, such as mass, radius, tidal deformability, e... |
0810.1776 | Klein David | David Klein, Peter Collas | Timelike Killing Fields and Relativistic Statistical Mechanics | This version contains minor corrections, additional discussion, and
will appear in Classical and Quantum Gravity | Class.Quant.Grav.26:045018,2009 | 10.1088/0264-9381/26/4/045018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For spacetimes with timelike Killing fields, we introduce a
"Fermi-Walker-Killing" coordinate system and use it to prove a Liouville
Theorem for an appropriate volume element of phase space for a statistical
mechanical system of particles. We derive an exact relativistic formula for the
Helmholtz free energy of an id... | [
{
"created": "Thu, 9 Oct 2008 23:00:15 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Dec 2008 14:30:18 GMT",
"version": "v2"
}
] | 2009-02-12 | [
[
"Klein",
"David",
""
],
[
"Collas",
"Peter",
""
]
] | For spacetimes with timelike Killing fields, we introduce a "Fermi-Walker-Killing" coordinate system and use it to prove a Liouville Theorem for an appropriate volume element of phase space for a statistical mechanical system of particles. We derive an exact relativistic formula for the Helmholtz free energy of an idea... |
1803.01171 | Didier Solis | Didier A. Solis | Global properties of asymptotically de Sitter and Anti de Sitter
spacetimes | 136 pages, 13 figures | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the first part of this work we show a uniqueness result for globally
hyperbolic spacetimes with a spacelike conformal boundary satisfying the vacuum
Einstein equations with positive cosmological constant. Then we present
applications of this result in the contexts of cosmic censorship and the
initial value problem... | [
{
"created": "Sat, 3 Mar 2018 14:23:09 GMT",
"version": "v1"
}
] | 2018-03-06 | [
[
"Solis",
"Didier A.",
""
]
] | In the first part of this work we show a uniqueness result for globally hyperbolic spacetimes with a spacelike conformal boundary satisfying the vacuum Einstein equations with positive cosmological constant. Then we present applications of this result in the contexts of cosmic censorship and the initial value problem i... |
1501.02636 | Luis Cort\'es Barbado | Luis C. Barbado | Hawking and Unruh radiation perception by different observers:
applications of the effective temperature function (in Spanish) | PhD Thesis of Luis Cort\'es Barbado, in Spanish. PhD supervisors:
Carlos Barcel\'o Ser\'on and Luis Javier Garay Elizondo. appears as Cort\'es
Barbado, L. Percepci\'on de las radiaciones Hawking y Unruh por distintos
observadores: aplicaciones de la funci\'on de temperatura efectiva. Granada:
Universidad de Gra... | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the perception of the radiation phenomena of Hawking radiation and
Unruh effect by using two main tools: the Unruh-DeWitt detectors and the
effective temperature function (ETF), this last tool based on Bogoliubov
transformations. Using the Unruh-DeWitt detectors we find an adiabatic
expansion of the detectio... | [
{
"created": "Mon, 12 Jan 2015 13:28:11 GMT",
"version": "v1"
}
] | 2015-01-13 | [
[
"Barbado",
"Luis C.",
""
]
] | We study the perception of the radiation phenomena of Hawking radiation and Unruh effect by using two main tools: the Unruh-DeWitt detectors and the effective temperature function (ETF), this last tool based on Bogoliubov transformations. Using the Unruh-DeWitt detectors we find an adiabatic expansion of the detection ... |
1301.1237 | Branislav Cvetkovi\'c | Milutin Blagojevi\'c, Branislav Cvetkovi\'c, Olivera Miskovic, and
Rodrigo Olea | Holography in 3D AdS gravity with torsion | LATEX, 26 pages; v2, minor revisions | null | 10.1007/JHEP05(2013)103 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Basic aspects of the AdS/CFT correspondence are studied in the framework of
3-dimensional gravity with torsion. After choosing a consistent holographic
ansatz, we formulate an improved approach to the Noether--Ward identities for
the boundary theory. The method is applied first to the topological
Mielke--Baekler mode... | [
{
"created": "Mon, 7 Jan 2013 15:51:41 GMT",
"version": "v1"
},
{
"created": "Mon, 6 May 2013 15:10:16 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Blagojević",
"Milutin",
""
],
[
"Cvetković",
"Branislav",
""
],
[
"Miskovic",
"Olivera",
""
],
[
"Olea",
"Rodrigo",
""
]
] | Basic aspects of the AdS/CFT correspondence are studied in the framework of 3-dimensional gravity with torsion. After choosing a consistent holographic ansatz, we formulate an improved approach to the Noether--Ward identities for the boundary theory. The method is applied first to the topological Mielke--Baekler model,... |
1911.00644 | Aar\'on Villanueva | Manuel Tiglio and Aar\'on Villanueva | On ab initio-based, free and closed-form expressions for gravitational
waves | 12 pages, 6 figures. Adding code for GWs and fix minor typos based on
journal reports. Accepted in Nature Scientific Reports | Scientific Reports 11, 5832 (2021) | 10.1038/s41598-021-85102-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a new approach for finding high accuracy, free and closed-form
expressions for the gravitational waves emitted by binary black hole collisions
from ab initio models. More precisely, our expressions are built from numerical
surrogate models based on supercomputer simulations of the Einstein equations,
whi... | [
{
"created": "Sat, 2 Nov 2019 04:10:52 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Feb 2021 08:37:56 GMT",
"version": "v2"
},
{
"created": "Fri, 12 Mar 2021 14:12:19 GMT",
"version": "v3"
}
] | 2021-03-15 | [
[
"Tiglio",
"Manuel",
""
],
[
"Villanueva",
"Aarón",
""
]
] | We introduce a new approach for finding high accuracy, free and closed-form expressions for the gravitational waves emitted by binary black hole collisions from ab initio models. More precisely, our expressions are built from numerical surrogate models based on supercomputer simulations of the Einstein equations, which... |
1508.06364 | Ryotaro Kase | Antonio De Felice, Ryotaro Kase, Shinji Tsujikawa | Existence and disappearance of conical singularities in
Gleyzes-Langlois-Piazza-Vernizzi theories | 10 pages | Phys. Rev. D 92, 124060 (2015) | 10.1103/PhysRevD.92.124060 | YITP-15-72 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a class of Gleyzes-Langlois-Piazza-Vernizzi (GLPV) theories, we derive
both vacuum and interior Schwarzschild solutions under the condition that the
derivatives of a scalar field $\phi$ with respect to the radius $r$ vanish. If
the parameter $\alpha_{\rm H}$ characterizing the deviation from Horndeski
theories app... | [
{
"created": "Wed, 26 Aug 2015 04:49:16 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Dec 2015 06:48:31 GMT",
"version": "v2"
}
] | 2015-12-29 | [
[
"De Felice",
"Antonio",
""
],
[
"Kase",
"Ryotaro",
""
],
[
"Tsujikawa",
"Shinji",
""
]
] | In a class of Gleyzes-Langlois-Piazza-Vernizzi (GLPV) theories, we derive both vacuum and interior Schwarzschild solutions under the condition that the derivatives of a scalar field $\phi$ with respect to the radius $r$ vanish. If the parameter $\alpha_{\rm H}$ characterizing the deviation from Horndeski theories appro... |
1908.00655 | Trevor Vincent | Trevor Vincent, Francois Foucart, Matthew D. Duez, Roland Haas,
Lawrence E. Kidder, Harald P. Pfeiffer and Mark A. Scheel | Unequal Mass Binary Neutron Star Simulations with Neutrino Transport:
Ejecta and Neutrino Emission | 23 pages, 15 figures | Phys. Rev. D 101, 044053 (2020) | 10.1103/PhysRevD.101.044053 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present twelve new simulations of unequal mass neutron star mergers. The
simulations were preformed with the SpEC code, and utilize nuclear-theory based
equations of state and a two-moment gray neutrino transport scheme with an
improved energy estimate based on evolving the number density. We model the
neutron sta... | [
{
"created": "Thu, 1 Aug 2019 23:03:45 GMT",
"version": "v1"
}
] | 2020-03-04 | [
[
"Vincent",
"Trevor",
""
],
[
"Foucart",
"Francois",
""
],
[
"Duez",
"Matthew D.",
""
],
[
"Haas",
"Roland",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Scheel",
"Mark A.",
""
... | We present twelve new simulations of unequal mass neutron star mergers. The simulations were preformed with the SpEC code, and utilize nuclear-theory based equations of state and a two-moment gray neutrino transport scheme with an improved energy estimate based on evolving the number density. We model the neutron stars... |
gr-qc/9702021 | Domenico Giulini | Domenico Giulini | Determination and Reduction of Large Diffeomorphisms | 4 pages, Latex, macro espcrc2.sty. Contribution to the proceedings of
the second conference on Constrained Dynamics and Quantum Gravity, Santa
Margherita, Italy, 17-21 September 1996. To appear in Nucl. Phys. B Suppl | Nucl.Phys.Proc.Suppl. 57 (1997) 342-345 | 10.1016/S0920-5632(97)00369-1 | Freiburg, THEP-97/5 | gr-qc | null | Within the Hamiltonian formulation of diffeomorphism invariant theories we
address the problem of how to determine and how to reduce diffeomorphisms
outside the identity component.
| [
{
"created": "Tue, 11 Feb 1997 15:54:20 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Giulini",
"Domenico",
""
]
] | Within the Hamiltonian formulation of diffeomorphism invariant theories we address the problem of how to determine and how to reduce diffeomorphisms outside the identity component. |
gr-qc/0611050 | Matej Pavsic | Matej Pavsic | An Extra Structure of Spacetime: A Space of Points, Areas and Volumes | 13 pages; A talk presented at the XXIX Spanish Relativity Meeting ERE
2006, 4th-8th September 2006, Palma de Mallorca, Spain | J.Phys.Conf.Ser.66:012022,2007 | 10.1088/1742-6596/66/1/012022 | null | gr-qc | null | A theory in which points, lines, areas and volumes are on on the same footing
is investigated. All those geometric objects form a 16-dimensional manifold,
called C-space, which generalizes spacetime. In such higher dimensional space
fundamental interactions can be unified \` a la Kaluza-Klein. The ordinary,
4-dimensi... | [
{
"created": "Wed, 8 Nov 2006 10:17:40 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Pavsic",
"Matej",
""
]
] | A theory in which points, lines, areas and volumes are on on the same footing is investigated. All those geometric objects form a 16-dimensional manifold, called C-space, which generalizes spacetime. In such higher dimensional space fundamental interactions can be unified \` a la Kaluza-Klein. The ordinary, 4-dimension... |
gr-qc/0608097 | Luciano Gottardi | Luciano Gottardi | Complete model of a spherical gravitational wave detector with
capacitive transducers. Calibration and sensitivity optimization | 23 pages, 20 figures, codes of the simulations are available on
request by contacting the author | Phys.Rev.D75:022002,2007 | 10.1103/PhysRevD.75.022002 | null | gr-qc | null | We report the results of a detailed numerical analysis of a real resonant
spherical gravitational wave antenna operating with six resonant two-mode
capacitive transducers read out by superconducting quantum interference devices
(SQUID) amplifiers. We derive a set of equations to describe the
electro-mechanical dynami... | [
{
"created": "Sun, 20 Aug 2006 19:44:16 GMT",
"version": "v1"
},
{
"created": "Tue, 1 May 2007 16:38:05 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Gottardi",
"Luciano",
""
]
] | We report the results of a detailed numerical analysis of a real resonant spherical gravitational wave antenna operating with six resonant two-mode capacitive transducers read out by superconducting quantum interference devices (SQUID) amplifiers. We derive a set of equations to describe the electro-mechanical dynamics... |
1705.03265 | Andrea Addazi AndAdd | Andrea Addazi, Shin'ichi Nojiri, Sergei Odintsov | Evaporation and anti-evaporation instability of a Schwarzschild-de
Sitter braneworld: the case of five-dimensional F(R) gravity | 10 pages, version accepted (to appear) in PRD | Phys. Rev. D 95, 124020 (2017) | 10.1103/PhysRevD.95.124020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the problem of a four-dimensional brane lying in the
five-dimensional degenerate Schwarzschild-de Sitter (Nariai) black hole, in
five-dimensional $F(R)$-gravity. We show that there cannot exist the brane in
the Nariai bulk space except the case that the brane tension vanishes. We
demonstrate that the five-di... | [
{
"created": "Tue, 9 May 2017 10:37:26 GMT",
"version": "v1"
}
] | 2017-06-21 | [
[
"Addazi",
"Andrea",
""
],
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei",
""
]
] | We study the problem of a four-dimensional brane lying in the five-dimensional degenerate Schwarzschild-de Sitter (Nariai) black hole, in five-dimensional $F(R)$-gravity. We show that there cannot exist the brane in the Nariai bulk space except the case that the brane tension vanishes. We demonstrate that the five-dime... |
gr-qc/0305049 | Yuri N. Obukhov | Guillermo F. Rubilar, Yuri N. Obukhov, Friedrich W. Hehl | Torsion nonminimally coupled to the electromagnetic field and
birefringence | Revtex, 12 pages, no figures | Class.Quant.Grav. 20 (2003) L185-L192 | 10.1088/0264-9381/20/14/101 | null | gr-qc astro-ph hep-th | null | In conventional Maxwell--Lorentz electrodynamics, the propagation of light is
influenced by the metric, not, however, by the possible presence of a torsion
T. Still the light can feel torsion if the latter is coupled nonminimally to
the electromagnetic field F by means of a supplementary Lagrangian of the type
l^2 T^... | [
{
"created": "Tue, 13 May 2003 18:18:34 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Rubilar",
"Guillermo F.",
""
],
[
"Obukhov",
"Yuri N.",
""
],
[
"Hehl",
"Friedrich W.",
""
]
] | In conventional Maxwell--Lorentz electrodynamics, the propagation of light is influenced by the metric, not, however, by the possible presence of a torsion T. Still the light can feel torsion if the latter is coupled nonminimally to the electromagnetic field F by means of a supplementary Lagrangian of the type l^2 T^2 ... |
2207.06007 | Pankaj Sheoran | Shobhit Giri, Pankaj Sheoran, Hemwati Nandan and Sanjar Shaymatov | Chaos motion and Periastron precession of spinning test particles moving
in the vicinage of a Schwarzschild black hole surrounded by a quintessence
matter field | 18 pages, 11 Captioned figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work, our main objective is to investigate the orbits of
spinning test particles around a Schwarzschild black hole under the influence
of a quintessence matter field (SQBH). We begin with the dynamics of the
spinning test particles around SQBH which is governed by the
Mathisson-Papapetrou-Dixon (MPD) e... | [
{
"created": "Wed, 13 Jul 2022 07:26:55 GMT",
"version": "v1"
}
] | 2022-07-14 | [
[
"Giri",
"Shobhit",
""
],
[
"Sheoran",
"Pankaj",
""
],
[
"Nandan",
"Hemwati",
""
],
[
"Shaymatov",
"Sanjar",
""
]
] | In the present work, our main objective is to investigate the orbits of spinning test particles around a Schwarzschild black hole under the influence of a quintessence matter field (SQBH). We begin with the dynamics of the spinning test particles around SQBH which is governed by the Mathisson-Papapetrou-Dixon (MPD) equ... |
2309.08554 | Tomi Koivisto | D\'ebora Aguiar Gomes, Jose Beltr\'an Jim\'enez, Tomi S. Koivisto | General Parallel Cosmology | 17 pages + appendices and references, 1 table. Submitted v2: less
typos, more refs | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General (tele)parallel Relativity, G$_\parallel$R, is the relativistic
completion of Einstein's theories of gravity. The focus of this article is the
derivation of the homogeneous and isotropic solution in G$_\parallel$R. The
first-principles derivation, based on a non-trivial realisation of the
symmetry, supersedes ... | [
{
"created": "Fri, 15 Sep 2023 17:20:35 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Oct 2023 15:31:24 GMT",
"version": "v2"
}
] | 2023-10-18 | [
[
"Gomes",
"Débora Aguiar",
""
],
[
"Jiménez",
"Jose Beltrán",
""
],
[
"Koivisto",
"Tomi S.",
""
]
] | General (tele)parallel Relativity, G$_\parallel$R, is the relativistic completion of Einstein's theories of gravity. The focus of this article is the derivation of the homogeneous and isotropic solution in G$_\parallel$R. The first-principles derivation, based on a non-trivial realisation of the symmetry, supersedes an... |
1702.06357 | Kourosh Nozari | Mohsen Khodadi, Kourosh Nozari and Anahita Hajizadeh | Some Astrophysical Aspects of a Schwarzschild Geometry Equipped with a
Minimal Measurable Length | 12 pages, 2 figures, Revised Version, to appear in PLB | Phys. Lett. B 770 (2017) 556 | 10.1016/j.physletb.2017.05.016 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By considering a deformation of the Schwarzschild metric in the presence of a
minimal measurable length which still respects the equivalence principle, we
study corrections to the standard general relativistic predictions for some
astrophysical phenomena such as stability of circular orbits of black hole
accretion di... | [
{
"created": "Tue, 21 Feb 2017 12:45:20 GMT",
"version": "v1"
},
{
"created": "Sun, 7 May 2017 13:50:52 GMT",
"version": "v2"
}
] | 2017-06-22 | [
[
"Khodadi",
"Mohsen",
""
],
[
"Nozari",
"Kourosh",
""
],
[
"Hajizadeh",
"Anahita",
""
]
] | By considering a deformation of the Schwarzschild metric in the presence of a minimal measurable length which still respects the equivalence principle, we study corrections to the standard general relativistic predictions for some astrophysical phenomena such as stability of circular orbits of black hole accretion disk... |
2206.07111 | Ulrich Beckering Vinckers | Ulrich K. Beckering Vinckers, \'Alvaro de la Cruz-Dombriz, Ivan
Kol\'a\v{r}, Francisco J. Maldonado Torralba, Anupam Mazumdar | Ghost-free infinite-derivative dilaton gravity in two dimensions | 21 pages, 5 figures, version accepted for publication in PRD | Phys. Rev. D 106, 064037 (2022) | 10.1103/PhysRevD.106.064037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the ghost-free infinite-derivative extensions of the
Spherically-Reduced Gravity (SRG) and Callan-Giddings-Harvey-Strominger (CGHS)
theories in two space-time dimensions. For the case of SRG, we specify the
Schwarzschild-type gauge and diagonalise the quadratic action for field
perturbations after taking t... | [
{
"created": "Tue, 14 Jun 2022 18:53:10 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Sep 2022 10:50:30 GMT",
"version": "v2"
}
] | 2022-09-23 | [
[
"Vinckers",
"Ulrich K. Beckering",
""
],
[
"de la Cruz-Dombriz",
"Álvaro",
""
],
[
"Kolář",
"Ivan",
""
],
[
"Torralba",
"Francisco J. Maldonado",
""
],
[
"Mazumdar",
"Anupam",
""
]
] | We present the ghost-free infinite-derivative extensions of the Spherically-Reduced Gravity (SRG) and Callan-Giddings-Harvey-Strominger (CGHS) theories in two space-time dimensions. For the case of SRG, we specify the Schwarzschild-type gauge and diagonalise the quadratic action for field perturbations after taking the... |
2102.02215 | Shahar Hod | Shahar Hod | Stationary scalar clouds supported by rapidly-rotating acoustic black
holes in a photon-fluid model | 6 pages | Phys. Rev. D 103, 084003 (2021) | 10.1103/PhysRevD.103.084003 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | It has recently been proved that, in the presence of vortex flows, the
fluctuation dynamics of a rotating photon-fluid model is governed by the
Klein-Gordon equation of an effective massive scalar field in a
$(2+1)$-dimensional acoustic black-hole spacetime. Interestingly, it has been
demonstrated numerically that th... | [
{
"created": "Wed, 3 Feb 2021 19:00:01 GMT",
"version": "v1"
}
] | 2021-04-07 | [
[
"Hod",
"Shahar",
""
]
] | It has recently been proved that, in the presence of vortex flows, the fluctuation dynamics of a rotating photon-fluid model is governed by the Klein-Gordon equation of an effective massive scalar field in a $(2+1)$-dimensional acoustic black-hole spacetime. Interestingly, it has been demonstrated numerically that the ... |
2205.03643 | Semra G\"urta\c{s} Do\u{g}an | Abdullah Guvendi, Semra Gurtas Dogan | Quasibound states for a scalar field under the influence of an external
magnetic field in the near-horizon geometry of the BTZ black hole with
torsion | null | Indian J Phys (2023) | 10.1007/s12648-023-02743-7 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We consider a charged scalar field under the effect of an external uniform
magnetic field in the near-horizon geometry of the Banados-Teitelboim-Zanelli
black hole with torsion and obtain quasi-stationary states of the system under
consideration through obtaining analytical solution of the corresponding
Klein-Gordon ... | [
{
"created": "Sat, 7 May 2022 12:34:54 GMT",
"version": "v1"
},
{
"created": "Sun, 29 May 2022 05:53:58 GMT",
"version": "v2"
},
{
"created": "Mon, 4 Jul 2022 17:17:45 GMT",
"version": "v3"
},
{
"created": "Tue, 15 Nov 2022 13:23:21 GMT",
"version": "v4"
}
] | 2023-05-25 | [
[
"Guvendi",
"Abdullah",
""
],
[
"Dogan",
"Semra Gurtas",
""
]
] | We consider a charged scalar field under the effect of an external uniform magnetic field in the near-horizon geometry of the Banados-Teitelboim-Zanelli black hole with torsion and obtain quasi-stationary states of the system under consideration through obtaining analytical solution of the corresponding Klein-Gordon eq... |
gr-qc/0410053 | Robert Mann | Amjad Ashoorioon and Robert B. Mann | Generation of Cosmological Seed Magnetic Fields from Inflation with
Cutoff | Latex, 16 pages, 2 figures, 4 references added, minor corrections;
v4: more references added, boundary term written in a covariant form,
discussion regarding other gauge fields added, submitted to PRD; v5: matched
with the published version | Phys.Rev. D71 (2005) 103509 | 10.1103/PhysRevD.71.103509 | null | gr-qc astro-ph hep-th | null | Inflation has the potential to seed the galactic magnetic fields observed
today. However, there is an obstacle to the amplification of the quantum
fluctuations of the electromagnetic field during inflation: namely the
conformal invariance of electromagnetic theory on a conformally flat underlying
geometry. As the exi... | [
{
"created": "Tue, 12 Oct 2004 20:11:22 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Oct 2004 19:21:05 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Nov 2004 18:04:44 GMT",
"version": "v3"
},
{
"created": "Fri, 15 Apr 2005 18:50:38 GMT",
"version": "v4"
},
{
"c... | 2007-05-23 | [
[
"Ashoorioon",
"Amjad",
""
],
[
"Mann",
"Robert B.",
""
]
] | Inflation has the potential to seed the galactic magnetic fields observed today. However, there is an obstacle to the amplification of the quantum fluctuations of the electromagnetic field during inflation: namely the conformal invariance of electromagnetic theory on a conformally flat underlying geometry. As the exist... |
1306.1826 | Ignazio Ciufolini | Ignazio Ciufolini | Time travel, Clock Puzzles and Their Experimental Tests | To appear in the European Journal of Physics Web of Conf. (2013) | null | 10.1051/epjconf/20135801005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Is time travel possible? What is Einstein's theory of relativity
mathematically predicting in that regard? Is time travel related to the
so-called clock 'paradoxes' of relativity and if so how? Is there any accurate
experimental evidence of the phenomena regarding the different flow of time
predicted by General Relat... | [
{
"created": "Fri, 7 Jun 2013 10:56:14 GMT",
"version": "v1"
}
] | 2017-03-22 | [
[
"Ciufolini",
"Ignazio",
""
]
] | Is time travel possible? What is Einstein's theory of relativity mathematically predicting in that regard? Is time travel related to the so-called clock 'paradoxes' of relativity and if so how? Is there any accurate experimental evidence of the phenomena regarding the different flow of time predicted by General Relativ... |
1212.4318 | Remo Garattini | Remo Garattini | Effects of Modified Dispersion Relations and Noncommutative Geometry on
the Cosmological Constant Computation | 8 Pages. Prepared for the Proceedings of the "Twelfth international
Symposium Frontiers of fundamental Physics FFP12", Udine 21-23.11.11 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute Zero Point Energy in a spherically symmetric background with the
help of the Wheeler-DeWitt equation. This last one is regarded as a
Sturm-Liouville problem with the cosmological constant considered as the
associated eigenvalue. The graviton contribution, at one loop is extracted with
the help of a variati... | [
{
"created": "Tue, 18 Dec 2012 11:42:36 GMT",
"version": "v1"
}
] | 2012-12-19 | [
[
"Garattini",
"Remo",
""
]
] | We compute Zero Point Energy in a spherically symmetric background with the help of the Wheeler-DeWitt equation. This last one is regarded as a Sturm-Liouville problem with the cosmological constant considered as the associated eigenvalue. The graviton contribution, at one loop is extracted with the help of a variation... |
gr-qc/0409003 | John J. Oh | Sung-Won Kim, Won Tae Kim, and John J. Oh | Decay Rate and Low-Energy Near-Horizon Dynamics of Acoustic Black Holes | 13pages, 3figures, RevTeX3, some minors corrected. version to appear
in PLB | Phys.Lett.B608:10-16,2005 | 10.1016/j.physletb.2005.01.012 | null | gr-qc hep-th | null | We study the low-energy dynamics of an acoustic black hole near the sonic
horizon. For the experimental test of black hole evaporation in the laboratory,
the decay rate (greybody factor) of the acoustic black hole (sonic hole) can be
calculated by the usual low-energy perturbation method. As a consequence, we
obtain ... | [
{
"created": "Wed, 1 Sep 2004 04:52:25 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Oct 2004 17:38:39 GMT",
"version": "v2"
},
{
"created": "Thu, 25 Nov 2004 20:31:01 GMT",
"version": "v3"
}
] | 2010-11-05 | [
[
"Kim",
"Sung-Won",
""
],
[
"Kim",
"Won Tae",
""
],
[
"Oh",
"John J.",
""
]
] | We study the low-energy dynamics of an acoustic black hole near the sonic horizon. For the experimental test of black hole evaporation in the laboratory, the decay rate (greybody factor) of the acoustic black hole (sonic hole) can be calculated by the usual low-energy perturbation method. As a consequence, we obtain th... |
2205.05891 | Shiraz Khan | Shiraz Khan, S. A. Mardan, M. A. Rehman | Development of complexity induced frameworks for charged cylindrical
polytropes | 21 pages, 6 figures | null | 10.1088/1475-7516/2022/07/023 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | The main theme of this work is the development of complexity induced
generalized frameworks for static cylindrical polytropes. We consider two
different definitions of generalized polytopes with charged anisotropic inner
fluid distribution. A new methodology based on complexity factor for the
generation of consistent... | [
{
"created": "Thu, 12 May 2022 06:05:19 GMT",
"version": "v1"
}
] | 2022-07-20 | [
[
"Khan",
"Shiraz",
""
],
[
"Mardan",
"S. A.",
""
],
[
"Rehman",
"M. A.",
""
]
] | The main theme of this work is the development of complexity induced generalized frameworks for static cylindrical polytropes. We consider two different definitions of generalized polytopes with charged anisotropic inner fluid distribution. A new methodology based on complexity factor for the generation of consistent s... |
gr-qc/9809010 | Toru Tsuchida | Tooru Tsuchida, Kazuya Watanabe | Comment on the exterior solutions and their geometry in scalar-tensor
theories of gravity | 18 pages, 3 figures, Submitted to Progress of Theoretical Physics | Prog.Theor.Phys.101:73-90,1999 | 10.1143/PTP.101.73 | null | gr-qc | null | We study series of the stationary solutions with asymptotic flatness
properties in the Einstein-Maxwell-free scalar system because they are locally
equivalent with the exterior solutions in some class of the scalar-tensor
theories of gravity. First, we classify spherical exterior solutions into two
types of the solut... | [
{
"created": "Wed, 2 Sep 1998 14:16:53 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Sep 1998 09:56:02 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Tsuchida",
"Tooru",
""
],
[
"Watanabe",
"Kazuya",
""
]
] | We study series of the stationary solutions with asymptotic flatness properties in the Einstein-Maxwell-free scalar system because they are locally equivalent with the exterior solutions in some class of the scalar-tensor theories of gravity. First, we classify spherical exterior solutions into two types of the solutio... |
1312.4128 | Chen Songbai | LiYong Ji, Songbai Chen, Jiliang Jing | Strong gravitational lensing in a rotating Kaluza-Klein black hole with
squashed horizons | 20 pages; 7 figures. Accepted for publication in JHEP. arXiv admin
note: substantial text overlap with arXiv:1102.0086 | JHEP 03 (2014) 089 | 10.1007/JHEP03(2014)089 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have investigated the strong gravitational lensing in a rotating squashed
Kaluza-Klein (KK) black hole spacetime. Our result show that the strong
gravitational lensings in the rotating squashed KK black hole spacetime have
some distinct behaviors from those in the backgrounds of the four-dimensional
Kerr black hol... | [
{
"created": "Sun, 15 Dec 2013 09:50:39 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Feb 2014 04:01:09 GMT",
"version": "v2"
}
] | 2014-04-01 | [
[
"Ji",
"LiYong",
""
],
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | We have investigated the strong gravitational lensing in a rotating squashed Kaluza-Klein (KK) black hole spacetime. Our result show that the strong gravitational lensings in the rotating squashed KK black hole spacetime have some distinct behaviors from those in the backgrounds of the four-dimensional Kerr black hole ... |
1001.3096 | Gaston Giribet | C. Garraffo, G. Giribet, E. Gravanis, S. Willison | Vacuum thin shell solutions in five-dimensional Lovelock gravity | 9 pages. This is an extended version of the authors' contribution to
the Proceedings of the Marcel Grossmann Meeting, held in Paris, 12-18 July
2009 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Junction conditions for vacuum solutions in five-dimensional
Einstein-Gauss-Bonnet gravity are studied. We focus on those cases where two
spherically symmetric regions of space-time are joined in such a way that the
induced stress tensor on the junction surface vanishes. So a spherical vacuum
shell, containing no mat... | [
{
"created": "Mon, 18 Jan 2010 18:23:28 GMT",
"version": "v1"
}
] | 2010-01-19 | [
[
"Garraffo",
"C.",
""
],
[
"Giribet",
"G.",
""
],
[
"Gravanis",
"E.",
""
],
[
"Willison",
"S.",
""
]
] | Junction conditions for vacuum solutions in five-dimensional Einstein-Gauss-Bonnet gravity are studied. We focus on those cases where two spherically symmetric regions of space-time are joined in such a way that the induced stress tensor on the junction surface vanishes. So a spherical vacuum shell, containing no matte... |
gr-qc/9906048 | Stoytcho Yazadjiev | S.Yazadjiev | Exact static solutions in four dimensional Einstein-Maxwell-Dilaton
gravity | 8 pages, latex | Int.J.Mod.Phys. D8 (1999) 635-643 | 10.1142/S0218271899000432 | SUTH 99-14 | gr-qc | null | Classes of exact static solutions in four-dimensional
Einstein-Maxwell-Dilaton gravity are found. Besides of the well-known solutions
previously found in the literature, new solutions are presented.It's shown that
spherically symmetric solutions, except the case of charged dilaton black hole,
represent globally naked... | [
{
"created": "Tue, 15 Jun 1999 11:29:12 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Yazadjiev",
"S.",
""
]
] | Classes of exact static solutions in four-dimensional Einstein-Maxwell-Dilaton gravity are found. Besides of the well-known solutions previously found in the literature, new solutions are presented.It's shown that spherically symmetric solutions, except the case of charged dilaton black hole, represent globally naked s... |
1907.00027 | Pablo Laguna | Kenny Higginbotham, Bhavesh Khamesra, Jame P. McInerney, Karan Jani,
Deirdre M. Shoemaker, Pablo Laguna | Coping with Junk Radiation in Binary Black Hole Simulations | 5 pages, 6 figures | Phys. Rev. D 100, 081501 (2019) | 10.1103/PhysRevD.100.081501 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spurious junk radiation in the initial data for binary black hole numerical
simulations has been an issue of concern. The radiation affects the masses and
spins of the black holes, modifying their orbital dynamics and thus potentially
compromising the accuracy of templates used in gravitational wave analysis. Our
stu... | [
{
"created": "Fri, 28 Jun 2019 18:29:22 GMT",
"version": "v1"
}
] | 2019-10-09 | [
[
"Higginbotham",
"Kenny",
""
],
[
"Khamesra",
"Bhavesh",
""
],
[
"McInerney",
"Jame P.",
""
],
[
"Jani",
"Karan",
""
],
[
"Shoemaker",
"Deirdre M.",
""
],
[
"Laguna",
"Pablo",
""
]
] | Spurious junk radiation in the initial data for binary black hole numerical simulations has been an issue of concern. The radiation affects the masses and spins of the black holes, modifying their orbital dynamics and thus potentially compromising the accuracy of templates used in gravitational wave analysis. Our study... |
0906.1448 | Hideki Asada | Yuji Torigoe, Keisuke Hattori, Hideki Asada | Gravitational waveforms for 2- and 3-body gravitating systems | 11 pages, 4 figures, accepted for publication in PRL | Phys.Rev.Lett.102:251101,2009 | 10.1103/PhysRevLett.102.251101 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Different numbers of self-gravitating particles (in different types of
periodic motion) are most likely to generate very different shapes of
gravitational waves, some of which, however, can be accidentally almost the
same. One such example is a binary and a three-body system for Lagrange's
solution. To track the evol... | [
{
"created": "Mon, 8 Jun 2009 09:39:16 GMT",
"version": "v1"
}
] | 2009-07-22 | [
[
"Torigoe",
"Yuji",
""
],
[
"Hattori",
"Keisuke",
""
],
[
"Asada",
"Hideki",
""
]
] | Different numbers of self-gravitating particles (in different types of periodic motion) are most likely to generate very different shapes of gravitational waves, some of which, however, can be accidentally almost the same. One such example is a binary and a three-body system for Lagrange's solution. To track the evolut... |
gr-qc/0301060 | Roberto Gomez | Nigel T. Bishop, Roberto Gomez, Sascha Husa, Luis Lehner, Jeffrey
Winicour | A numerical relativistic model of a massive particle in orbit near a
Schwarzschild black hole | 12 pages, 9 figures, RevTeX4, to appear in Phys. Rev. D | Phys.Rev. D68 (2003) 084015 | 10.1103/PhysRevD.68.084015 | AEI-2003-006, NSF-KITP-03-55 | gr-qc | null | We present a method for computing the evolution of a spacetime containing a
massive particle and a black hole. The essential idea is that the gravitational
field is evolved using full numerical relativity, with the particle generating
a non-zero source term in the Einstein equations. The matter fields are not
evolved... | [
{
"created": "Thu, 16 Jan 2003 16:14:01 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Sep 2003 17:51:41 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Bishop",
"Nigel T.",
""
],
[
"Gomez",
"Roberto",
""
],
[
"Husa",
"Sascha",
""
],
[
"Lehner",
"Luis",
""
],
[
"Winicour",
"Jeffrey",
""
]
] | We present a method for computing the evolution of a spacetime containing a massive particle and a black hole. The essential idea is that the gravitational field is evolved using full numerical relativity, with the particle generating a non-zero source term in the Einstein equations. The matter fields are not evolved b... |
2407.12946 | Ali Bleybel Dr. | Ali Bleybel | On the conformal group of a globally hyperbolic spacetime | null | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Groups of causal and conformal automorphisms of globally hyperbolic
spacetimes were studied.
In two dimensions, we prove that all globally hyperbolic spacetimes that are
directed and connected are causally isomorphic. We work out the consequences of
this fact and obtain a (partial) classification of the causal ... | [
{
"created": "Wed, 17 Jul 2024 18:24:12 GMT",
"version": "v1"
}
] | 2024-07-19 | [
[
"Bleybel",
"Ali",
""
]
] | The Groups of causal and conformal automorphisms of globally hyperbolic spacetimes were studied. In two dimensions, we prove that all globally hyperbolic spacetimes that are directed and connected are causally isomorphic. We work out the consequences of this fact and obtain a (partial) classification of the causal auto... |
gr-qc/9807077 | Jorge Pullin | Reinaldo Gleiser, Carlos Nicasio, Richard Price and Jorge Pullin | Gravitational radiation from Schwarzschild black holes: the second order
perturbation formalism | 28 pages, no figures, RevTeX, final version to appear in Physics
Reports | Phys.Rept. 325 (2000) 41-81 | 10.1016/S0370-1573(99)00048-4 | CGPG-98/7-2 | gr-qc astro-ph | null | The perturbation theory of black holes has been useful recently for providing
estimates of gravitational radiation from black hole collisions. Second order
perturbation theory, relatively undeveloped until recently, has proved to be
important both for providing refined estimates and for indicating the range of
validi... | [
{
"created": "Wed, 29 Jul 1998 05:10:41 GMT",
"version": "v1"
},
{
"created": "Fri, 7 May 1999 04:00:23 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Gleiser",
"Reinaldo",
""
],
[
"Nicasio",
"Carlos",
""
],
[
"Price",
"Richard",
""
],
[
"Pullin",
"Jorge",
""
]
] | The perturbation theory of black holes has been useful recently for providing estimates of gravitational radiation from black hole collisions. Second order perturbation theory, relatively undeveloped until recently, has proved to be important both for providing refined estimates and for indicating the range of validity... |
0806.0950 | Matt Visser | Jozef Skakala (Victoria University of Wellington), Matt Visser
(Victoria University of Wellington) | Pseudo-Finslerian spacetimes and multi-refringence | V1: 19 pages. V2: Now 30 pages. Title changed, discussion
considerably expanded and rearranged, references more than doubled. This
version accepted for publication in International Journal of Modern Physics
D. | Int.J.Mod.Phys.D19:1119-1146,2010 | 10.1142/S0218271810017172 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is reasonably well-known that birefringent crystal optics can to some
extent be described by the use of pseudo-Finslerian spacetimes (an extension of
pseudo-Riemannian spacetime). What is less commonly appreciated is that there
are two separate and quite disjoint pseudo-Finsler structures for the two
photon polari... | [
{
"created": "Thu, 5 Jun 2008 11:42:38 GMT",
"version": "v1"
},
{
"created": "Fri, 7 May 2010 22:43:39 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Skakala",
"Jozef",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | It is reasonably well-known that birefringent crystal optics can to some extent be described by the use of pseudo-Finslerian spacetimes (an extension of pseudo-Riemannian spacetime). What is less commonly appreciated is that there are two separate and quite disjoint pseudo-Finsler structures for the two photon polariza... |
1902.05760 | Betti Hartmann | Yves Brihaye (Universite de Mons, Belgium) and Betti Hartmann
(IFSC/USP, Brazil) | Spontaneous scalarization of charged black holes at the approach to
extremality | 13 pages including 6 figures and one table | null | 10.1016/j.physletb.2019.03.043 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study static, spherically symmetric and electrically charged black hole
solutions in a quadratic Einstein-scalar-Gauss-Bonnet gravity model. Very
similar to the uncharged case, black holes undergo spontaneous scalarization
for sufficiently large scalar-tensor coupling $\gamma$ - a phenomenon
attributed to a tachyo... | [
{
"created": "Fri, 15 Feb 2019 10:37:59 GMT",
"version": "v1"
}
] | 2019-04-03 | [
[
"Brihaye",
"Yves",
"",
"Universite de Mons, Belgium"
],
[
"Hartmann",
"Betti",
"",
"IFSC/USP, Brazil"
]
] | We study static, spherically symmetric and electrically charged black hole solutions in a quadratic Einstein-scalar-Gauss-Bonnet gravity model. Very similar to the uncharged case, black holes undergo spontaneous scalarization for sufficiently large scalar-tensor coupling $\gamma$ - a phenomenon attributed to a tachyoni... |
2301.09768 | Tiziano Schiavone | Tiziano Schiavone, Giovanni Montani | Signature of $f\left(R\right)$ gravity via Lema\^itre-Tolman-Bondi
inhomogeneous perturbations | 31 pages, 5 figures, updated to match published version | EPJC 84, 490 (2024) | 10.1140/epjc/s10052-024-12842-2 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We analyze inhomogeneous cosmological models in the local Universe, described
by the Lema\^itre-Tolman-Bondi (LTB) metric and developed using linear
perturbation theory on a homogeneous and isotropic Universe background.
Focusing on the different evolution of spherical symmetric inhomogeneities, we
compare the $\Lamb... | [
{
"created": "Tue, 24 Jan 2023 00:38:27 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Jul 2023 18:39:54 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Jan 2024 16:23:44 GMT",
"version": "v3"
},
{
"created": "Wed, 15 May 2024 17:34:05 GMT",
"version": "v4"
}
] | 2024-05-16 | [
[
"Schiavone",
"Tiziano",
""
],
[
"Montani",
"Giovanni",
""
]
] | We analyze inhomogeneous cosmological models in the local Universe, described by the Lema\^itre-Tolman-Bondi (LTB) metric and developed using linear perturbation theory on a homogeneous and isotropic Universe background. Focusing on the different evolution of spherical symmetric inhomogeneities, we compare the $\Lambda... |
2407.06926 | Som Dev Bishoyi | Som Dev Bishoyi, Subir Sabharwal and Gaurav Khanna | Non-Axisymmetric Gravitational "Hair" for Extremal Black Holes | 7 pages, 9 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Various generalizations of the scalar, axisymmetric Aretakis "horizon hair"
for extremal black holes have recently appeared in the literature. In this
paper, we present an expression for a non-axisymmetric Aretakis gravitational
charge and its potentially observable imprint at a finite distance from the
horizon (Ori-... | [
{
"created": "Tue, 9 Jul 2024 15:03:24 GMT",
"version": "v1"
}
] | 2024-07-11 | [
[
"Bishoyi",
"Som Dev",
""
],
[
"Sabharwal",
"Subir",
""
],
[
"Khanna",
"Gaurav",
""
]
] | Various generalizations of the scalar, axisymmetric Aretakis "horizon hair" for extremal black holes have recently appeared in the literature. In this paper, we present an expression for a non-axisymmetric Aretakis gravitational charge and its potentially observable imprint at a finite distance from the horizon (Ori-co... |
gr-qc/0501015 | Jakob Hansen | Jakob Hansen, Alexei Khokhlov and Igor Novikov | Physics of the interior of a spherical, charged black hole with a scalar
field | null | Phys.Rev. D71 (2005) 064013 | 10.1103/PhysRevD.71.064013 | null | gr-qc | null | We analyse the physics of nonlinear gravitational processes inside a
spherical charged black hole perturbed by a self-gravitating massless scalar
field. For this purpose we created an appropriate numerical code. Throughout
the paper, in addition to investigation of the properties of the mathematical
singularities whe... | [
{
"created": "Thu, 6 Jan 2005 13:44:24 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Hansen",
"Jakob",
""
],
[
"Khokhlov",
"Alexei",
""
],
[
"Novikov",
"Igor",
""
]
] | We analyse the physics of nonlinear gravitational processes inside a spherical charged black hole perturbed by a self-gravitating massless scalar field. For this purpose we created an appropriate numerical code. Throughout the paper, in addition to investigation of the properties of the mathematical singularities where... |
2308.09974 | Jose Luis Flores | Ivan P. Costa e Silva, Jos\'e L. Flores, Benjam\'in Olea | On the existence of sections with constant surface gravity on null
hypersurfaces | 21 pages | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We identify, in spacetimes satisfying the null convergence condition, a
certain natural class of null hypersurfaces that admit null sections with
constant surface gravity. Our work is meant to offer complementary results to
previous work on null hypersurfaces of zero expansion arising from the study of
Cauchy and bla... | [
{
"created": "Sat, 19 Aug 2023 10:37:34 GMT",
"version": "v1"
}
] | 2023-08-22 | [
[
"Silva",
"Ivan P. Costa e",
""
],
[
"Flores",
"José L.",
""
],
[
"Olea",
"Benjamín",
""
]
] | We identify, in spacetimes satisfying the null convergence condition, a certain natural class of null hypersurfaces that admit null sections with constant surface gravity. Our work is meant to offer complementary results to previous work on null hypersurfaces of zero expansion arising from the study of Cauchy and black... |
1310.1602 | Yu-Huei Wu | Chih-Hung Wang and Yu-Huei Wu | Gravitational radiation and angular momentum flux from a spinning
dynamical black hole | JGRG 20, 2010/9/24, conference proceeding | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/3.0/ | A four-dimensional asymptotic expansion scheme is used to study the next
order effects of the nonlinearity near a spinning dynamical black hole. The
angular momentum flux and energy flux formula are then obtained by asymptotic
expansion and the compatibility of the coupling Newman-Penrose equations. After
constructin... | [
{
"created": "Sun, 6 Oct 2013 16:56:08 GMT",
"version": "v1"
}
] | 2013-10-08 | [
[
"Wang",
"Chih-Hung",
""
],
[
"Wu",
"Yu-Huei",
""
]
] | A four-dimensional asymptotic expansion scheme is used to study the next order effects of the nonlinearity near a spinning dynamical black hole. The angular momentum flux and energy flux formula are then obtained by asymptotic expansion and the compatibility of the coupling Newman-Penrose equations. After constructing ... |
2302.09471 | Chi-Yong Lin | Yi-Ting Li, Chen-Yu Wang, Da-Shin Lee, and Chi-Yong Lin | Homoclinic orbits in Kerr-Newman black holes | 29 pages, 10 figures, revised version accepted for publication in
Physical Review D. arXiv admin note: text overlap with arXiv:2208.11906 | Physical Review D 108, 044010 (2023) | 10.1103/PhysRevD.108.044010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the exact solutions of the homoclinic orbits for the timelike
geodesics of the particle on the general nonequatorial orbits in the
Kerr-Newman black holes. The homoclinic orbit is the separatrix between bound
and plunging geodesics, a solution that asymptotes to an energetically bound,
unstable spherical o... | [
{
"created": "Sun, 19 Feb 2023 03:59:56 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Aug 2023 01:55:46 GMT",
"version": "v2"
}
] | 2023-08-11 | [
[
"Li",
"Yi-Ting",
""
],
[
"Wang",
"Chen-Yu",
""
],
[
"Lee",
"Da-Shin",
""
],
[
"Lin",
"Chi-Yong",
""
]
] | We present the exact solutions of the homoclinic orbits for the timelike geodesics of the particle on the general nonequatorial orbits in the Kerr-Newman black holes. The homoclinic orbit is the separatrix between bound and plunging geodesics, a solution that asymptotes to an energetically bound, unstable spherical orb... |
2310.11278 | Metin Arik | Metin Arik, Tarik Tok | The Higgs Field in the closed FLRW universe | 20 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider SO(3) symmetric triplet of Higgs fields and SO(4) symmetric
complex doublet of Higgs fields in the closed FLRW universe. For these models,
Lagrangian densities provide effective potentials leading to spontaneous
symmetry breaking which gives cosmological expectation value of the Higgs field
and the Higgs ... | [
{
"created": "Tue, 17 Oct 2023 13:56:55 GMT",
"version": "v1"
}
] | 2023-10-18 | [
[
"Arik",
"Metin",
""
],
[
"Tok",
"Tarik",
""
]
] | We consider SO(3) symmetric triplet of Higgs fields and SO(4) symmetric complex doublet of Higgs fields in the closed FLRW universe. For these models, Lagrangian densities provide effective potentials leading to spontaneous symmetry breaking which gives cosmological expectation value of the Higgs field and the Higgs ma... |
2105.06366 | Ajit Mehta | Ajit Kumar Mehta, Alessandra Buonanno, Jonathan Gair, M. Coleman
Miller, Ebraheem Farag, R. J. deBoer, M. Wiescher, F.X. Timmes | Observing intermediate-mass black holes and the upper--stellar-mass gap
with LIGO and Virgo | 29 pages, 18 figures | The Astrophysical Journal, Volume 924, Number 1 (2022) | 10.3847/1538-4357/ac3130 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Using ground-based gravitational-wave detectors, we probe the mass function
of intermediate-mass black holes (IMBHs) wherein we also include BHs in the
upper mass gap $\sim 60-130~M_\odot$. Employing the projected sensitivity of
the upcoming LIGO and Virgo fourth observing (O4) run, we perform Bayesian
analysis on qu... | [
{
"created": "Thu, 13 May 2021 15:53:33 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Oct 2021 14:06:17 GMT",
"version": "v2"
}
] | 2022-01-25 | [
[
"Mehta",
"Ajit Kumar",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Gair",
"Jonathan",
""
],
[
"Miller",
"M. Coleman",
""
],
[
"Farag",
"Ebraheem",
""
],
[
"deBoer",
"R. J.",
""
],
[
"Wiescher",
"M.",
""
],... | Using ground-based gravitational-wave detectors, we probe the mass function of intermediate-mass black holes (IMBHs) wherein we also include BHs in the upper mass gap $\sim 60-130~M_\odot$. Employing the projected sensitivity of the upcoming LIGO and Virgo fourth observing (O4) run, we perform Bayesian analysis on quas... |
2211.09579 | Maxim Khlopov | M.Yu. Khlopov and O.M. Lecian | Evolution and Possible Forms of Primordial Antimatter and Dark Matter
celestial objects | Prepared for Proceedings of XXV Bled Workshop "What comes beyond the
Standard models?" | null | null | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The structure and evolution of Primordial Antimatter domains and Dark matter
objects are analysed. Relativistic low-density antimatter domains are
described. The Relativistic FRW perfect-fluid solution is found for the
characterization of i) ultra-high density antimatter domains, ii) high-density
antimatter domains, ... | [
{
"created": "Thu, 17 Nov 2022 15:10:21 GMT",
"version": "v1"
}
] | 2022-11-18 | [
[
"Khlopov",
"M. Yu.",
""
],
[
"Lecian",
"O. M.",
""
]
] | The structure and evolution of Primordial Antimatter domains and Dark matter objects are analysed. Relativistic low-density antimatter domains are described. The Relativistic FRW perfect-fluid solution is found for the characterization of i) ultra-high density antimatter domains, ii) high-density antimatter domains, an... |
0708.2469 | Hyeong-Chan Kim | Hyeong-Chan Kim and Jungjai Lee | Extraordinary vacuum black string solutions | 20 pages, 4 figures, add 2 references | Phys.Rev.D77:024012,2008 | 10.1103/PhysRevD.77.024012 | null | gr-qc hep-th | null | In addition to the boosted static solution there are two other classes of
stationary string-like solutions of the vacuum Einstein equation in
(4+1)-dimensions. Each class is characterized by three parameters of mass,
tension, and momentum flow along the fifth coordinate. We analyze the metric
properties of one of the... | [
{
"created": "Sat, 18 Aug 2007 11:18:14 GMT",
"version": "v1"
},
{
"created": "Sat, 8 Dec 2007 03:03:51 GMT",
"version": "v2"
},
{
"created": "Mon, 14 Jan 2008 08:19:53 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Kim",
"Hyeong-Chan",
""
],
[
"Lee",
"Jungjai",
""
]
] | In addition to the boosted static solution there are two other classes of stationary string-like solutions of the vacuum Einstein equation in (4+1)-dimensions. Each class is characterized by three parameters of mass, tension, and momentum flow along the fifth coordinate. We analyze the metric properties of one of the t... |
1709.05851 | Przemyslaw Malkiewicz | Herv\'e Bergeron, Jean Pierre Gazeau and Przemys{\l}aw Ma{\l}kiewicz | Primordial gravitational waves in a quantum model of big bounce | 38 pages, 8 figures | JCAP 05 (2018) 057 | 10.1088/1475-7516/2018/05/057 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We quantise and solve the dynamics of gravitational waves in a quantum
Friedmann-Lemaitre-Robertson-Walker spacetime filled with perfect fluid. The
classical model is formulated canonically. The Hamiltonian constraint is
de-parametrised by setting a fluid variable as the internal clock. The obtained
reduced (i.e. phy... | [
{
"created": "Mon, 18 Sep 2017 10:33:07 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Apr 2018 10:33:57 GMT",
"version": "v2"
}
] | 2018-05-29 | [
[
"Bergeron",
"Hervé",
""
],
[
"Gazeau",
"Jean Pierre",
""
],
[
"Małkiewicz",
"Przemysław",
""
]
] | We quantise and solve the dynamics of gravitational waves in a quantum Friedmann-Lemaitre-Robertson-Walker spacetime filled with perfect fluid. The classical model is formulated canonically. The Hamiltonian constraint is de-parametrised by setting a fluid variable as the internal clock. The obtained reduced (i.e. physi... |
2207.13431 | Alejandro Jim\'enez-Cano | Adri\`a Delhom, Alejandro Jim\'enez-Cano and Francisco Jos\'e
Maldonado Torralba | Instabilities in field theories: Lecture notes with a view into modified
gravity | 53 pages, 2 figures, 2 tables. This text is an extended and polished
version of the lectures prepared for the course `Selected Topics in the
Theories of Gravity', given at the Institute of Physics (University of Tartu,
Estonia) in spring 2022 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified theories of gravity usually present new degrees of freedom, as well
as higher order derivatives, wrong signs in certain terms and complicated
couplings already present in the Lagrangian from the beginning or originated by
the field redefinitions needed to reach an Einstein frame. As a consequence,
they are v... | [
{
"created": "Wed, 27 Jul 2022 10:20:44 GMT",
"version": "v1"
}
] | 2022-07-28 | [
[
"Delhom",
"Adrià",
""
],
[
"Jiménez-Cano",
"Alejandro",
""
],
[
"Torralba",
"Francisco José Maldonado",
""
]
] | Modified theories of gravity usually present new degrees of freedom, as well as higher order derivatives, wrong signs in certain terms and complicated couplings already present in the Lagrangian from the beginning or originated by the field redefinitions needed to reach an Einstein frame. As a consequence, they are ver... |
2101.01949 | Aurelien Barrau | Aur\'elien Barrau, L\'eonard Ferdinand, Killian Martineau, Cyril
Renevey | Closer look at white hole remnants | null | Phys. Rev. D 103, 043532 (2021) | 10.1103/PhysRevD.103.043532 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The idea that, after their evaporation, Planck-mass black holes might tunnel
into metastable white holes has recently been intensively studied. Those relics
have been considered as a dark matter candidate. We show that the model is
severely constrained and underline some possible detection paths. We also
investigate,... | [
{
"created": "Wed, 6 Jan 2021 10:18:18 GMT",
"version": "v1"
},
{
"created": "Sat, 13 Feb 2021 12:20:56 GMT",
"version": "v2"
}
] | 2021-03-03 | [
[
"Barrau",
"Aurélien",
""
],
[
"Ferdinand",
"Léonard",
""
],
[
"Martineau",
"Killian",
""
],
[
"Renevey",
"Cyril",
""
]
] | The idea that, after their evaporation, Planck-mass black holes might tunnel into metastable white holes has recently been intensively studied. Those relics have been considered as a dark matter candidate. We show that the model is severely constrained and underline some possible detection paths. We also investigate, i... |
1910.08487 | Gerasimos Rigopoulos | Tomislav Prokopec and Gerasimos Rigopoulos | $\Delta\mathcal{N}$ and the stochastic conveyor belt of Ultra Slow-Roll | v1: 28 pages, 5 figures; v2: small changes in text for
clarifications, results unchanged, matches version to be published in
Phys.Rev.D | Phys. Rev. D 104, 083505 (2021) | 10.1103/PhysRevD.104.083505 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse field fluctuations during an Ultra Slow-Roll phase in the
stochastic picture of inflation and the resulting non-Gaussian curvature
perturbation, fully including the gravitational backreaction of the field's
velocity. By working to leading order in a gradient expansion, we first
demonstrate that consistency... | [
{
"created": "Fri, 18 Oct 2019 16:11:58 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Sep 2021 20:45:38 GMT",
"version": "v2"
}
] | 2021-10-04 | [
[
"Prokopec",
"Tomislav",
""
],
[
"Rigopoulos",
"Gerasimos",
""
]
] | We analyse field fluctuations during an Ultra Slow-Roll phase in the stochastic picture of inflation and the resulting non-Gaussian curvature perturbation, fully including the gravitational backreaction of the field's velocity. By working to leading order in a gradient expansion, we first demonstrate that consistency w... |
1408.4535 | Babak Vakili | B. Vakili, K. Nozari, V. Hosseinzadeh and M. A. Gorji | Bouncing scalar field cosmology in the polymeric minisuperspace picture | 11 pages, 2 figures, to appear in MPLA. (Although the main results in
this paper may be considered as a reproduction of the results of reference
16, we would like to draw the reader's attention to the method of "Polymeric
symplectic structure" from which the results are obtained.) | Mod. Phys. Lett. A 29 (2014) 1450169 | 10.1142/S0217732314501697 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a cosmological setup consisting of a FRW metric as the background
geometry with a massless scalar field in the framework of classical
polymerization of a given dynamical system. To do this, we first introduce the
polymeric representation of the quantum operators. We then extend the
corresponding process to r... | [
{
"created": "Wed, 20 Aug 2014 06:19:52 GMT",
"version": "v1"
}
] | 2014-10-21 | [
[
"Vakili",
"B.",
""
],
[
"Nozari",
"K.",
""
],
[
"Hosseinzadeh",
"V.",
""
],
[
"Gorji",
"M. A.",
""
]
] | We study a cosmological setup consisting of a FRW metric as the background geometry with a massless scalar field in the framework of classical polymerization of a given dynamical system. To do this, we first introduce the polymeric representation of the quantum operators. We then extend the corresponding process to rea... |
0908.2356 | Stephen Fairhurst | Stephen Fairhurst | Triangulation of gravitational wave sources with a network of detectors | 20 pages, 5 figures | New J.Phys.11:123006,2009; Erratum-ibid.13:069602,2011 | 10.1088/1367-2630/11/12/123006 10.1088/1367-2630/13/6/069602 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is significant benefit to be gained by pursuing multi-messenger
astronomy with gravitational wave and electromagnetic observations. In order to
undertake electromagnetic follow-ups of gravitational wave signals, it will be
necessary to accurately localize them in the sky. Since gravitational wave
detectors are ... | [
{
"created": "Mon, 17 Aug 2009 13:34:23 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Dec 2009 14:01:30 GMT",
"version": "v2"
}
] | 2011-07-06 | [
[
"Fairhurst",
"Stephen",
""
]
] | There is significant benefit to be gained by pursuing multi-messenger astronomy with gravitational wave and electromagnetic observations. In order to undertake electromagnetic follow-ups of gravitational wave signals, it will be necessary to accurately localize them in the sky. Since gravitational wave detectors are no... |
1503.02662 | Neil J. Cornish | Laura Sampson, Neil J. Cornish and Sean T. McWilliams | Constraining the Solution to the Last Parsec Problem with Pulsar Timing | 14 pages, 8 figures | null | 10.1103/PhysRevD.91.084055 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of a stochastic gravitational-wave signal from the
superposition of many inspiraling supermassive black holes with pulsar timing
arrays (PTAs) is likely to occur within the next decade. With this detection
will come the opportunity to learn about the processes that drive
black-hole-binary systems toward... | [
{
"created": "Mon, 9 Mar 2015 20:00:09 GMT",
"version": "v1"
}
] | 2015-06-24 | [
[
"Sampson",
"Laura",
""
],
[
"Cornish",
"Neil J.",
""
],
[
"McWilliams",
"Sean T.",
""
]
] | The detection of a stochastic gravitational-wave signal from the superposition of many inspiraling supermassive black holes with pulsar timing arrays (PTAs) is likely to occur within the next decade. With this detection will come the opportunity to learn about the processes that drive black-hole-binary systems toward m... |
1301.0698 | Yuri Pavlov | A. A. Grib and Yu. V. Pavlov | On the energy of particle collisions in the ergosphere of the rotating
black holes | 4 pages, 1 figure | EPL (Europhysics Letters) 101 (2013) 20004 | 10.1209/0295-5075/101/20004 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the energy in the centre of mass frame of colliding
particles in free fall at any point of the ergosphere of the rotating black
hole can grow without limit for fixed energy values on infinity. The effect
takes place for large negative values of the angular momentum of one of the
particles.
| [
{
"created": "Fri, 4 Jan 2013 10:31:58 GMT",
"version": "v1"
}
] | 2013-01-31 | [
[
"Grib",
"A. A.",
""
],
[
"Pavlov",
"Yu. V.",
""
]
] | It is shown that the energy in the centre of mass frame of colliding particles in free fall at any point of the ergosphere of the rotating black hole can grow without limit for fixed energy values on infinity. The effect takes place for large negative values of the angular momentum of one of the particles. |
1712.09852 | Philippe Brax | Philippe Brax and Mario Pitschmann | Exact Solutions to Non-Linear Symmetron Theory: One and Two Mirror
Systems | 14 pages, 6 figures | Phys. Rev. D 97, 064015 (2018) | 10.1103/PhysRevD.97.064015 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the exact analytical solutions to the symmetron field theory
equations in the presence of a one or two mirror system. The one dimensional
equations of motion are integrated exactly for both systems and their solutions
can be expressed in terms of Jacobi elliptic functions. Surprisingly, in the
case of two p... | [
{
"created": "Thu, 28 Dec 2017 13:31:09 GMT",
"version": "v1"
}
] | 2018-03-21 | [
[
"Brax",
"Philippe",
""
],
[
"Pitschmann",
"Mario",
""
]
] | We derive the exact analytical solutions to the symmetron field theory equations in the presence of a one or two mirror system. The one dimensional equations of motion are integrated exactly for both systems and their solutions can be expressed in terms of Jacobi elliptic functions. Surprisingly, in the case of two par... |
1010.2057 | Qasem Exirifard | Qasem Exirifard | Triangular Ring Resonator: Direct measurement of the parity-odd
parameters of the photon sector of SME | ref. added, minor corrections, matches the published version | null | 10.1142/S0218271814500382 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce the the Triangular Ring (TR) resonator. We show that the
difference between the clockwise and anti-clockwise resonant frequencies of a
vacuum TR resonator is sensitive to the birefringence parity-odd parameters of
the photon's sector of the minimal Standard Model Extension (mSME): the
Standard Model plus... | [
{
"created": "Mon, 11 Oct 2010 10:27:13 GMT",
"version": "v1"
},
{
"created": "Sat, 13 Nov 2010 08:07:37 GMT",
"version": "v2"
},
{
"created": "Sun, 30 Jan 2011 14:39:37 GMT",
"version": "v3"
},
{
"created": "Thu, 14 Jul 2011 11:25:30 GMT",
"version": "v4"
},
{
"c... | 2015-03-17 | [
[
"Exirifard",
"Qasem",
""
]
] | We introduce the the Triangular Ring (TR) resonator. We show that the difference between the clockwise and anti-clockwise resonant frequencies of a vacuum TR resonator is sensitive to the birefringence parity-odd parameters of the photon's sector of the minimal Standard Model Extension (mSME): the Standard Model plus a... |
gr-qc/9903044 | Heinz-Juergen Schmidt | H.-J. Schmidt, F. Homann (University of Osnabrueck) | Photon Stars | 10 pages, 5 figures, talk at the DPG Spring Meeting 1999 | Gen.Rel.Grav. 32 (2000) 919-931 | 10.1023/A:1001989125318 | null | gr-qc | null | We discuss numerical solutions of Einstein's field equation describing
static, spherically symmetric conglomerations of a photon gas. These equations
imply a back reaction of the metric on the energy density of the photon gas
according to Tolman's equation. The 3-fold of solutions corresponds to a class
of physically... | [
{
"created": "Fri, 12 Mar 1999 13:56:21 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Schmidt",
"H. -J.",
"",
"University of Osnabrueck"
],
[
"Homann",
"F.",
"",
"University of Osnabrueck"
]
] | We discuss numerical solutions of Einstein's field equation describing static, spherically symmetric conglomerations of a photon gas. These equations imply a back reaction of the metric on the energy density of the photon gas according to Tolman's equation. The 3-fold of solutions corresponds to a class of physically d... |
2105.07890 | Jorge Armando Rueda | J. A. Rueda and R. Ruffini | The Quantum Emission of an Alive Black Hole | Third Award Winning Essay of the "Gravity Research Foundation 2021
awards for essays on Gravitation", to be published in a special issue of
IJMPD in October 2021. arXiv admin note: substantial text overlap with
arXiv:1911.07552 | null | 10.1142/S0218271821410030 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A long march of fifty years of successive theoretical progress and new
physics discovered using observations of gamma-ray bursts, has finally led to
the formulation of an efficient mechanism able to extract the rotational energy
of a Kerr black hole to power these most energetic astrophysical sources and
active galac... | [
{
"created": "Fri, 14 May 2021 07:51:28 GMT",
"version": "v1"
}
] | 2022-01-26 | [
[
"Rueda",
"J. A.",
""
],
[
"Ruffini",
"R.",
""
]
] | A long march of fifty years of successive theoretical progress and new physics discovered using observations of gamma-ray bursts, has finally led to the formulation of an efficient mechanism able to extract the rotational energy of a Kerr black hole to power these most energetic astrophysical sources and active galacti... |
1003.1619 | Lorenzo Fatibene | L. Fatibene, M. Ferraris, M. Francaviglia | Extended Loop Quantum Gravity | 7 pages, few typos corrected | Class.Quant.Grav.27:185016,2010 | 10.1088/0264-9381/27/18/185016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss constraint structure of extended theories of gravitation (also
known as f(R) theories) in the vacuum selfdual formulation introduced in ref.
[1].
| [
{
"created": "Mon, 8 Mar 2010 13:26:46 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Mar 2010 17:25:16 GMT",
"version": "v2"
},
{
"created": "Thu, 18 Mar 2010 06:47:27 GMT",
"version": "v3"
}
] | 2015-03-13 | [
[
"Fatibene",
"L.",
""
],
[
"Ferraris",
"M.",
""
],
[
"Francaviglia",
"M.",
""
]
] | We discuss constraint structure of extended theories of gravitation (also known as f(R) theories) in the vacuum selfdual formulation introduced in ref. [1]. |
gr-qc/9805054 | Dan Baleanu | Dumitru Baleanu (Bogoliubov LPTh, Dubna, Russia) | Killing-Yano tensors and Nambu tensors | content enlarged and revised,10 pages LateX, no figures, accepted for
publication in Il Nuovo Cimento | null | null | null | gr-qc | null | We present the conditions when a Killing-Yano tensor becomes a Nambu tensor.
We have shown that in the flat space case all Killing-Yano tensors are Nambu
tensors.
In the case of Taub-NUT metric and Kerr-Newmann metric we found that a
Killing-Yano tensor of order two generate a Nambu tensor of order three.
| [
{
"created": "Thu, 14 May 1998 19:49:09 GMT",
"version": "v1"
},
{
"created": "Sat, 16 May 1998 20:37:10 GMT",
"version": "v2"
},
{
"created": "Sun, 15 Aug 1999 10:42:54 GMT",
"version": "v3"
},
{
"created": "Tue, 17 Aug 1999 18:38:17 GMT",
"version": "v4"
}
] | 2016-08-31 | [
[
"Baleanu",
"Dumitru",
"",
"Bogoliubov LPTh, Dubna, Russia"
]
] | We present the conditions when a Killing-Yano tensor becomes a Nambu tensor. We have shown that in the flat space case all Killing-Yano tensors are Nambu tensors. In the case of Taub-NUT metric and Kerr-Newmann metric we found that a Killing-Yano tensor of order two generate a Nambu tensor of order three. |
gr-qc/9808052 | Massimo Giovannini | Massimo Giovannini (University of Cambridge, DAMTP) | Magnetic Knots as The origin of Spikes in the Gravitational Waves
Backgrounds | Accepted for publication in Physical Review D, 20 pages in RevTex
style, 4 Encapsulated figures | Phys.Rev. D58 (1998) 124027 | 10.1103/PhysRevD.58.124027 | DAMTP-1998-107 | gr-qc astro-ph hep-ph hep-th | null | The dynamical symmetries of hot and electrically neutral plasmas in a highly
conducting medium suggest that, after the epoch of the electron-positron
annihilation, magnetohydrodynamical configurations carrying a net magnetic
helicity can be present. The simultaneous conservation of the magnetic flux and
helicity impl... | [
{
"created": "Wed, 19 Aug 1998 22:29:19 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Giovannini",
"Massimo",
"",
"University of Cambridge, DAMTP"
]
] | The dynamical symmetries of hot and electrically neutral plasmas in a highly conducting medium suggest that, after the epoch of the electron-positron annihilation, magnetohydrodynamical configurations carrying a net magnetic helicity can be present. The simultaneous conservation of the magnetic flux and helicity implie... |
2208.00425 | Beatriz Elizaga Navascu\'es | Beatriz Elizaga Navascu\'es, Alejandro Garc\'ia-Quismondo, and
Guillermo A. Mena Marug\'an | Hamiltonian formulation and loop quantization of a recent extension of
the Kruskal spacetime | 18 pages | Phys. Rev. D 106, 043531 (2022) | 10.1103/PhysRevD.106.043531 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Hamiltonian formulation of the Ashtekar-Olmedo-Singh model for
the description of the interior geometry of non-rotating, uncharged black
holes. This model incorporates loop quantum effects through the introduction of
two regularization parameters. We consider an extended phase space formalism
proposed by... | [
{
"created": "Sun, 31 Jul 2022 13:03:51 GMT",
"version": "v1"
}
] | 2022-09-07 | [
[
"Navascués",
"Beatriz Elizaga",
""
],
[
"García-Quismondo",
"Alejandro",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
]
] | We study the Hamiltonian formulation of the Ashtekar-Olmedo-Singh model for the description of the interior geometry of non-rotating, uncharged black holes. This model incorporates loop quantum effects through the introduction of two regularization parameters. We consider an extended phase space formalism proposed by t... |
2002.10264 | Haidar Sheikhahmadi | Haidar Sheikhahmadi | An exact solution for a force-free field electrodynamics accretion disk
surrounding a perturbed charged black hole | I appreciate any constructive comments and enlightening criticisms. 4
pages | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently the first real image of the supermassive black hole at the heart of
the galaxy M87 successfully has been captured. To explain the behavior of both
the observed powerful jets and the electromagnetic accretion disk the Blandford
Znajek mechanism, by the Event Horizon Telescope collaboration, has been
considere... | [
{
"created": "Fri, 21 Feb 2020 13:36:05 GMT",
"version": "v1"
}
] | 2020-02-25 | [
[
"Sheikhahmadi",
"Haidar",
""
]
] | Recently the first real image of the supermassive black hole at the heart of the galaxy M87 successfully has been captured. To explain the behavior of both the observed powerful jets and the electromagnetic accretion disk the Blandford Znajek mechanism, by the Event Horizon Telescope collaboration, has been considered.... |
gr-qc/9311003 | Sergey Tertychniy | S.Tertychniy | Local Determination of the Light Deflection in the Sperically Symmetric
Static Gravitational Field | 23 pages including 2 figures, uuencoded compressed PostScript, no
local number | null | null | null | gr-qc | null | The new method of invariant definition of the measurable angle of light
deflection in the static central symmetric gravitational field is suggested.
The predicted pure gravitational contribution to the deflection angle slightly
differs from its classical estimate and one may hope that this discrepancy
could be experi... | [
{
"created": "Tue, 2 Nov 1993 19:23:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Tertychniy",
"S.",
""
]
] | The new method of invariant definition of the measurable angle of light deflection in the static central symmetric gravitational field is suggested. The predicted pure gravitational contribution to the deflection angle slightly differs from its classical estimate and one may hope that this discrepancy could be experime... |
2404.00407 | Ayesha Almas | Adnan Malik, Yonghui Xia, Ayesha Almas, M. Farasat Shamir | Anisotropic Spheres Via Embedding Approach in $f(R,\phi, X)$ Gravity | 20 pages, 21 figures | Eur. Phys. J. Plus 138 (2023) 1091 | 10.1140/epjp/s13360-023-04721-8 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this manuscript, we investigate the behavior of stellar structure through
embedding approach in $f(R, \phi, X)$ modified theory of gravity, where $R$
denotes the Ricci scalar, $\phi$ represents the scalar potential and $X$
indicates the kinetic potential. For this purpose, we consider the spherically
symmetric spa... | [
{
"created": "Sat, 30 Mar 2024 16:24:09 GMT",
"version": "v1"
}
] | 2024-04-02 | [
[
"Malik",
"Adnan",
""
],
[
"Xia",
"Yonghui",
""
],
[
"Almas",
"Ayesha",
""
],
[
"Shamir",
"M. Farasat",
""
]
] | In this manuscript, we investigate the behavior of stellar structure through embedding approach in $f(R, \phi, X)$ modified theory of gravity, where $R$ denotes the Ricci scalar, $\phi$ represents the scalar potential and $X$ indicates the kinetic potential. For this purpose, we consider the spherically symmetric space... |
1101.4668 | Cynthia Trendafilova | Cynthia S. Trendafilova and Stephen A. Fulling | Static solutions of Einstein's equations with cylindrical symmetry | 16 pages, 5 figures, 3 tables; many literature citations removed from
main body; added historical section to put project into context and include
additional references | Eur. J. Phys. 32 (2011) 1663-1677 | 10.1088/0143-0807/32/6/020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In analogy with the standard derivation of the Schwarzschild solution, we
find all static, cylindrically symmetric solutions of the Einstein field
equations for vacuum. These include not only the well known cone solution,
which is locally flat, but others in which the metric coefficients are powers
of the radial coor... | [
{
"created": "Mon, 24 Jan 2011 21:35:06 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Jun 2011 19:02:15 GMT",
"version": "v2"
},
{
"created": "Fri, 26 Aug 2011 18:06:41 GMT",
"version": "v3"
}
] | 2015-05-27 | [
[
"Trendafilova",
"Cynthia S.",
""
],
[
"Fulling",
"Stephen A.",
""
]
] | In analogy with the standard derivation of the Schwarzschild solution, we find all static, cylindrically symmetric solutions of the Einstein field equations for vacuum. These include not only the well known cone solution, which is locally flat, but others in which the metric coefficients are powers of the radial coordi... |
1604.07253 | Scott Robertson | Scott Robertson, Florent Michel, Renaud Parentani | Scattering of gravity waves in subcritical flows over an obstacle | 21 pages, 17 figures | Phys. Rev. D 93, 124060 (2016) | 10.1103/PhysRevD.93.124060 | null | gr-qc physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We numerically study the scattering coefficients of linear water waves on
stationary flows above a localized obstacle. We compare the scattering on
trans- and subcritical flows, and then focus on the latter which have been used
in recent analog gravity experiments. The main difference concerns the
magnitude of the mo... | [
{
"created": "Mon, 25 Apr 2016 13:43:15 GMT",
"version": "v1"
}
] | 2016-06-29 | [
[
"Robertson",
"Scott",
""
],
[
"Michel",
"Florent",
""
],
[
"Parentani",
"Renaud",
""
]
] | We numerically study the scattering coefficients of linear water waves on stationary flows above a localized obstacle. We compare the scattering on trans- and subcritical flows, and then focus on the latter which have been used in recent analog gravity experiments. The main difference concerns the magnitude of the mode... |
gr-qc/9909038 | Bogdan Dimitrov | B.G. Dimitrov (JINR, Dubna) | A Modified Variational Principle in Relativistic Hydrodynamics. II.
Variations of the vector field and the projection tensor in the general case
and under definite assumptions | 31 pages, Latex, no figures | null | null | null | gr-qc | null | The purpose of the paper is to develop further a projection variational
approach in relativistic hydrodynamics. The approach, previously proposed in
[gr-qc/9908032], is based on the variation of the vector field and the
projection tensor (instead of the given metric tensor) and their first partial
derivatives. The pr... | [
{
"created": "Sun, 12 Sep 1999 12:50:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dimitrov",
"B. G.",
"",
"JINR, Dubna"
]
] | The purpose of the paper is to develop further a projection variational approach in relativistic hydrodynamics. The approach, previously proposed in [gr-qc/9908032], is based on the variation of the vector field and the projection tensor (instead of the given metric tensor) and their first partial derivatives. The prev... |
1508.07573 | Vladimir Khatsymovsky | V.M. Khatsymovsky | First order minisuperspace model for the Faddeev formulation of gravity | 12 pages, 1 figure, to appear in Mod. Phys. Lett. A | Mod. Phys. Lett. A, Vol. 30, No. 32 (2015) 1550172 | 10.1142/S0217732315501746 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Faddeev formulation of general relativity (GR) is considered where the metric
is composed of ten vector fields or a ten-dimensional tetrad. Upon partial use
of the field equations, this theory results in the usual GR.
Earlier we have proposed some minisuperspace model for the Faddeev
formulation where the tetrad fi... | [
{
"created": "Sun, 30 Aug 2015 13:56:31 GMT",
"version": "v1"
}
] | 2015-09-28 | [
[
"Khatsymovsky",
"V. M.",
""
]
] | Faddeev formulation of general relativity (GR) is considered where the metric is composed of ten vector fields or a ten-dimensional tetrad. Upon partial use of the field equations, this theory results in the usual GR. Earlier we have proposed some minisuperspace model for the Faddeev formulation where the tetrad fields... |
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