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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1511.05047 | Ernesto F. Eiroa | Leonardo Amarilla, Ernesto F. Eiroa | Shadow cast by a Kaluza-Klein spinning dilaton black hole | 6 pages, 2 figures, prepared for the proceedings of the 2nd
Argentinian-Brazilian Meeting on Gravitation, Astrophysics, and Cosmology
(GRACO2) | Proceedings of the Second Argentinian-Brazilian Meeting on
Gravitation, Relativistic Astrophysics and Cosmology (GRACo II), pages 57-62
(Asociacion Argentina de Astronomia Workshop Series Vol. 7, La Plata, 2015) | null | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the shadow of a rotating Kaluza-Klein black hole in Einstein
gravity coupled to a Maxwell field and a dilaton. The size and the shape of the
shadow depend on the mass, the charge, and the angular momentum of the compact
object. For a given mass, the size increases with the rotation parameter and
decreases ... | [
{
"created": "Mon, 16 Nov 2015 17:21:02 GMT",
"version": "v1"
}
] | 2016-01-14 | [
[
"Amarilla",
"Leonardo",
""
],
[
"Eiroa",
"Ernesto F.",
""
]
] | We examine the shadow of a rotating Kaluza-Klein black hole in Einstein gravity coupled to a Maxwell field and a dilaton. The size and the shape of the shadow depend on the mass, the charge, and the angular momentum of the compact object. For a given mass, the size increases with the rotation parameter and decreases wi... |
gr-qc/0112066 | Shin'ichi Nojiri | Shin'ichi Nojiri and Sergei D. Odintsov | The de Sitter/Anti- de Sitter Black Holes phase transition? | LaTeX file 7pages, to appear in the Proceedings of the ``1st Mexican
Meeting on Mathematical and Experimental Physics", held at El Colegio
Nacional, 10-14 September, 2001 | null | null | null | gr-qc hep-th | null | We investigate the Schwarzschild-Anti-deSitter (SAdS) and SdS BH
thermodynamics in 5d higher derivative gravity. The interesting feature of
higher derivative gravity is the possibility for negative (or zero) SdS (or
SAdS) BH entropy which depends on the parameters of higher derivative terms.
The appearence of negativ... | [
{
"created": "Wed, 26 Dec 2001 01:25:07 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
]
] | We investigate the Schwarzschild-Anti-deSitter (SAdS) and SdS BH thermodynamics in 5d higher derivative gravity. The interesting feature of higher derivative gravity is the possibility for negative (or zero) SdS (or SAdS) BH entropy which depends on the parameters of higher derivative terms. The appearence of negative ... |
0909.0490 | L\'aszl\'o \'A Gergely | Zolt\'an Keresztes, L\'aszl\'o \'A. Gergely | Covariant gravitational dynamics in 3+1+1 dimensions | 35 pages 1 fig; significantly expanded with (a) new closure condition
on the brane, (b) discussion of anisotropic brane-worlds, (c) stationary
vacuum space-times with local rotational symmetry including (d) a new tidal
charged Taub-NUT-(A)dS brane solution; published version. | Class.Quant.Grav.27:105009,2010 | 10.1088/0264-9381/27/10/105009 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a 3+1+1 covariant formalism with cosmological and astrophysical
applications. First we give the evolution and constraint equations both on the
brane and off-brane in terms of 3-space covariant kinematical,
gravito-electro-magnetic (Weyl) and matter variables. We discuss the junction
conditions across the b... | [
{
"created": "Wed, 2 Sep 2009 19:09:54 GMT",
"version": "v1"
},
{
"created": "Tue, 11 May 2010 06:15:05 GMT",
"version": "v2"
}
] | 2010-05-12 | [
[
"Keresztes",
"Zoltán",
""
],
[
"Gergely",
"László Á.",
""
]
] | We develop a 3+1+1 covariant formalism with cosmological and astrophysical applications. First we give the evolution and constraint equations both on the brane and off-brane in terms of 3-space covariant kinematical, gravito-electro-magnetic (Weyl) and matter variables. We discuss the junction conditions across the bra... |
2210.15602 | Quentin Henry | Quentin Henry | Complete gravitational-waveform amplitude modes for quasi-circular
compact binaries to the 3.5PN order | 21 pages | null | 10.1103/PhysRevD.107.044057 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We complete the computation of the gravitational waveform amplitude for
non-spinning compact binaries to the third and a half post-Newtonian (PN) order
in the quasi-circular case. This is done by performing a spin-weighted
spherical harmonics decomposition of the amplitude. This computation is
achieved using the post... | [
{
"created": "Thu, 27 Oct 2022 16:40:55 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Nov 2022 10:10:22 GMT",
"version": "v2"
}
] | 2023-03-08 | [
[
"Henry",
"Quentin",
""
]
] | We complete the computation of the gravitational waveform amplitude for non-spinning compact binaries to the third and a half post-Newtonian (PN) order in the quasi-circular case. This is done by performing a spin-weighted spherical harmonics decomposition of the amplitude. This computation is achieved using the post-N... |
2112.02299 | Chunyu Zhang | Chunyu Zhang, Yungui Gong, Chao Zhang | Source localizations with the network of space-based gravitational wave
detectors | 14 pages, 8 figures, 2 tables. Phys. Rev. D accepted. Comments are
welcome! arXiv admin note: text overlap with arXiv:2105.11279 | Phys. Rev. D 106 (2022) 024004 | 10.1103/PhysRevD.106.024004 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The sky localization of the gravitational wave (GW) source is an important
scientific objective for GW observations. A network of space-based GW detectors
dramatically improves the sky localization accuracy compared with an individual
detector not only in the inspiral stage but also in the ringdown stage. It is
inter... | [
{
"created": "Sat, 4 Dec 2021 10:17:07 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Jun 2022 03:09:38 GMT",
"version": "v2"
}
] | 2022-07-06 | [
[
"Zhang",
"Chunyu",
""
],
[
"Gong",
"Yungui",
""
],
[
"Zhang",
"Chao",
""
]
] | The sky localization of the gravitational wave (GW) source is an important scientific objective for GW observations. A network of space-based GW detectors dramatically improves the sky localization accuracy compared with an individual detector not only in the inspiral stage but also in the ringdown stage. It is interes... |
gr-qc/9911102 | Alberto Vecchio | S. V. Dhurandhar and A. Vecchio (AEI) | Search for continuous gravitational wave signals from sources in binary
systems | 6 pages, 1 figure, To appear in the proceedings of the Second Tama
Workshop | null | null | null | gr-qc | null | We analyze the computational costs of searches for continuous monochromatic
gravitational waves emitted by rotating neutron stars orbiting a companion
object. As a function of the relevant orbital parameters, we address the
computational load involved in targeted searches, where the position of the
source is known; t... | [
{
"created": "Fri, 26 Nov 1999 10:02:10 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dhurandhar",
"S. V.",
"",
"AEI"
],
[
"Vecchio",
"A.",
"",
"AEI"
]
] | We analyze the computational costs of searches for continuous monochromatic gravitational waves emitted by rotating neutron stars orbiting a companion object. As a function of the relevant orbital parameters, we address the computational load involved in targeted searches, where the position of the source is known; the... |
2405.10287 | Farid Thaalba | Farid Thaalba, Giulia Ventagli, Thomas P. Sotiriou | Exotic compact objects and light bosonic fields | v3: minor changes, published version | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note, we discuss the effect of light, non-gauge, bosonic degrees of
freedom on the exterior spacetime of an exotic compact object. We show that
such fields generically introduce large deviations from black hole spacetimes
of General Relativity near and outside the surfaces of ultra-compact exotic
objects unle... | [
{
"created": "Thu, 16 May 2024 17:47:49 GMT",
"version": "v1"
},
{
"created": "Mon, 27 May 2024 14:43:42 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Jul 2024 15:43:23 GMT",
"version": "v3"
}
] | 2024-07-02 | [
[
"Thaalba",
"Farid",
""
],
[
"Ventagli",
"Giulia",
""
],
[
"Sotiriou",
"Thomas P.",
""
]
] | In this note, we discuss the effect of light, non-gauge, bosonic degrees of freedom on the exterior spacetime of an exotic compact object. We show that such fields generically introduce large deviations from black hole spacetimes of General Relativity near and outside the surfaces of ultra-compact exotic objects unless... |
2301.08763 | Ish Gupta | Ish Gupta, Ssohrab Borhanian, Arnab Dhani, Debatri Chattopadhyay,
Rahul Kashyap, V. Ashley Villar and B.S. Sathyaprakash | Neutron star-black hole mergers in next generation gravitational-wave
observatories | 30 pages, 15 figures, 15 tables | Phys. Rev. D 107, 124007 (2023) | 10.1103/PhysRevD.107.124007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observations by the current generation of gravitational-wave detectors have
been pivotal in expanding our understanding of the universe. Although tens of
exciting compact binary mergers have been observed, neutron star-black hole
(NSBH) mergers remained elusive until they were first confidently detected in
2020. The ... | [
{
"created": "Fri, 20 Jan 2023 19:01:09 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jul 2023 13:04:37 GMT",
"version": "v2"
}
] | 2023-07-26 | [
[
"Gupta",
"Ish",
""
],
[
"Borhanian",
"Ssohrab",
""
],
[
"Dhani",
"Arnab",
""
],
[
"Chattopadhyay",
"Debatri",
""
],
[
"Kashyap",
"Rahul",
""
],
[
"Villar",
"V. Ashley",
""
],
[
"Sathyaprakash",
"B. S.",
""
... | Observations by the current generation of gravitational-wave detectors have been pivotal in expanding our understanding of the universe. Although tens of exciting compact binary mergers have been observed, neutron star-black hole (NSBH) mergers remained elusive until they were first confidently detected in 2020. The nu... |
1212.0232 | Slava G. Turyshev | Slava G. Turyshev, Viktor T. Toth, and Mikhail V. Sazhin | General relativistic observables of the GRAIL mission | 29 pages, 2 figures, 1 table. arXiv admin note: replaced to remove
most of remaining text overlap with arXiv:gr-qc/0010108 by other authors | Phys.Rev. D87 (2013) 024020 | 10.1103/PhysRevD.87.024020 | null | gr-qc physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a realization of astronomical relativistic reference frames in the
solar system and its application to the GRAIL mission. We model the necessary
spacetime coordinate transformations for light-trip time computations and
address some practical aspects of the implementation of the resulting model. We
develop ... | [
{
"created": "Sun, 2 Dec 2012 18:37:56 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Dec 2012 20:21:19 GMT",
"version": "v2"
},
{
"created": "Thu, 13 Dec 2012 21:58:47 GMT",
"version": "v3"
},
{
"created": "Tue, 18 Dec 2012 15:48:30 GMT",
"version": "v4"
}
] | 2013-01-23 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Toth",
"Viktor T.",
""
],
[
"Sazhin",
"Mikhail V.",
""
]
] | We present a realization of astronomical relativistic reference frames in the solar system and its application to the GRAIL mission. We model the necessary spacetime coordinate transformations for light-trip time computations and address some practical aspects of the implementation of the resulting model. We develop al... |
gr-qc/0511134 | Andrea Fuster | Andrea Fuster | Non-abelian Yang-Mills in Kundt spacetimes | Talk presented at the XXVIII Spanish Relativity Meeting E.R.E. 2005,
Oviedo, September 6-10, 2005, to be published by AIP Conference Proceedings,
5 pages | null | 10.1063/1.2218206 | NIKHEF/2005-024 | gr-qc hep-th | null | We present new exact solutions of the Einstein-Yang-Mills system. The
solutions are described by a null Yang-Mills field in a Kundt spacetime. They
generalize a previously known solution for a metric of $pp$ wave type. The
solutions are formally of Petrov type III.
| [
{
"created": "Thu, 24 Nov 2005 17:39:57 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Fuster",
"Andrea",
""
]
] | We present new exact solutions of the Einstein-Yang-Mills system. The solutions are described by a null Yang-Mills field in a Kundt spacetime. They generalize a previously known solution for a metric of $pp$ wave type. The solutions are formally of Petrov type III. |
gr-qc/0206051 | Curt Cutler | Curt Cutler | Gravitational Waves from Neutron Stars with Large Toroidal B-fields | 7 pages; submitted to PRD; only minor revisions | Phys.Rev. D66 (2002) 084025 | 10.1103/PhysRevD.66.084025 | null | gr-qc astro-ph | null | We show that NS's with large toroidal B-fields tend naturally to evolve into
potent gravitational-wave (gw) emitters. The toroidal field B_t tends to
distort the NS into a prolate shape, and this magnetic distortion can easily
dominate over the oblateness ``frozen into'' the NS crust. An elastic NS with
frozen-in B-f... | [
{
"created": "Tue, 18 Jun 2002 12:58:59 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Aug 2002 11:37:30 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Cutler",
"Curt",
""
]
] | We show that NS's with large toroidal B-fields tend naturally to evolve into potent gravitational-wave (gw) emitters. The toroidal field B_t tends to distort the NS into a prolate shape, and this magnetic distortion can easily dominate over the oblateness ``frozen into'' the NS crust. An elastic NS with frozen-in B-fie... |
2004.00383 | Muhammad Zubair | M. Zubair, Saira Waheed, G. Mustafa, Hamood Ur Rehman | Noncommutative inspired wormholes admitting conformal motion involving
minimal coupling | 12 pages, 8 figures | International Journal of Modern Physics D Vol. 28, No. 04, 1950067
(2019) | 10.1142/S0218271819500676 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this manuscript, we explore the existence of wormhole solutions exhibiting
spherical symmetry in a modified gravity namely $f(R,T)$ theory by involving
some aspects of non-commutative geometry. For this purpose, we consider the
anisotropic matter contents along with the well-known Gaussian and Lorentizian
distribu... | [
{
"created": "Sat, 28 Mar 2020 08:26:21 GMT",
"version": "v1"
}
] | 2020-04-02 | [
[
"Zubair",
"M.",
""
],
[
"Waheed",
"Saira",
""
],
[
"Mustafa",
"G.",
""
],
[
"Rehman",
"Hamood Ur",
""
]
] | In this manuscript, we explore the existence of wormhole solutions exhibiting spherical symmetry in a modified gravity namely $f(R,T)$ theory by involving some aspects of non-commutative geometry. For this purpose, we consider the anisotropic matter contents along with the well-known Gaussian and Lorentizian distributi... |
gr-qc/9403063 | Melnikov Vitaly Nikolaevich | K.A.Bronnikov and V.N.Melnikov | The Birkhoff Theorem in Multidimensional Gravity | 8 pages | Gen.Rel.Grav. 27 (1995) 465-474 | 10.1007/BF02105073 | RGA-CSVR-003/94 | gr-qc | null | The validity conditions for the extended Birkhoff theorem in multidimensional
gravity with $n$ internal spaces are formulated, with no restriction on
space-time dimensionality and signature. Examples of matter sources and
geometries for which the theorem is valid are given. Further generalization of
the theorem is di... | [
{
"created": "Thu, 31 Mar 1994 15:31:24 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Melnikov",
"V. N.",
""
]
] | The validity conditions for the extended Birkhoff theorem in multidimensional gravity with $n$ internal spaces are formulated, with no restriction on space-time dimensionality and signature. Examples of matter sources and geometries for which the theorem is valid are given. Further generalization of the theorem is disc... |
gr-qc/0303054 | Jorge Pullin | Ramon Lopez-Aleman, Gaurav Khanna, Jorge Pullin | Perturbative evolution of particle orbits around Kerr black holes: time
domain calculation | 8 pages, 5 figures, problems with references and double-printing
fixed | Class.Quant.Grav. 20 (2003) 3259-3268 | 10.1088/0264-9381/20/14/320 | LSU-GRG-031203 | gr-qc | null | Treating the Teukolsky perturbation equation numerically as a 2+1 PDE and
smearing the singularities in the particle source term by the use of narrow
Gaussian distributions, we have been able to reproduce earlier results for
equatorial circular orbits that were computed using the frequency domain
formalism. A time do... | [
{
"created": "Wed, 12 Mar 2003 20:03:38 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Mar 2003 20:36:11 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Lopez-Aleman",
"Ramon",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Pullin",
"Jorge",
""
]
] | Treating the Teukolsky perturbation equation numerically as a 2+1 PDE and smearing the singularities in the particle source term by the use of narrow Gaussian distributions, we have been able to reproduce earlier results for equatorial circular orbits that were computed using the frequency domain formalism. A time doma... |
gr-qc/0503066 | Nikodem Poplawski | Nikodem J. Poplawski | A Michelson interferometer in the field of a plane gravitational wave | 13 pages, 2 figures; published version | J.Math.Phys.47:072501,2006 | 10.1063/1.2212670 | null | gr-qc astro-ph math-ph math.MP | null | We treat the problem of a Michelson interferometer in the field of a plane
gravitational wave in the framework of general relativity. The arms of the
interferometer are regarded as the world lines of the light beams, whose motion
is determined by the Hamilton-Jacobi equation for a massless particle. In the
case of a ... | [
{
"created": "Wed, 16 Mar 2005 03:05:36 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Mar 2005 02:11:53 GMT",
"version": "v2"
},
{
"created": "Fri, 21 Jul 2006 02:04:01 GMT",
"version": "v3"
}
] | 2009-02-23 | [
[
"Poplawski",
"Nikodem J.",
""
]
] | We treat the problem of a Michelson interferometer in the field of a plane gravitational wave in the framework of general relativity. The arms of the interferometer are regarded as the world lines of the light beams, whose motion is determined by the Hamilton-Jacobi equation for a massless particle. In the case of a we... |
1803.07399 | Tommi Markkanen | Konstantinos Dimopoulos and Tommi Markkanen | Non-minimal gravitational reheating during kination | v3: 19 pages, 2 figures, some improvements, published version | JCAP06(2018)021 | 10.1088/1475-7516/2018/06/021 | IMPERIAL/TP/2018/TM/01 | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new mechanism is presented which can reheat the Universe in non-oscillatory
models of inflation, where the inflation period is followed by a period
dominated by the kinetic density for the inflaton field (kination). The
mechanism considers an auxiliary field non-minimally coupled to gravity. The
auxiliary field is ... | [
{
"created": "Tue, 20 Mar 2018 12:54:02 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Apr 2018 13:45:11 GMT",
"version": "v2"
},
{
"created": "Tue, 12 Jun 2018 15:02:40 GMT",
"version": "v3"
}
] | 2018-06-13 | [
[
"Dimopoulos",
"Konstantinos",
""
],
[
"Markkanen",
"Tommi",
""
]
] | A new mechanism is presented which can reheat the Universe in non-oscillatory models of inflation, where the inflation period is followed by a period dominated by the kinetic density for the inflaton field (kination). The mechanism considers an auxiliary field non-minimally coupled to gravity. The auxiliary field is a ... |
gr-qc/9706011 | Doug Eardley | Shawn J. Kolitch (Physics, UCSB) and Douglas M. Eardley (ITP, UCSB) | Quantum Decay of Domain Walls In Cosmology I: Instanton Approach | 26 pages LaTeX, using revtex and psfig. 5 figures | Phys. Rev. D 56, 4651 (1997) | 10.1103/PhysRevD.56.4651 | NSF-ITP-97-050 | gr-qc hep-th | null | This paper studies the decay of a large, closed domain wall in a closed
universe. Such walls can form in the presence of a broken, discrete symmetry.
We introduce a novel process of quantum decay for such a wall, in which the
vacuum fluctuates from one discrete state to another throughout one half of the
universe, so... | [
{
"created": "Tue, 3 Jun 1997 15:56:03 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Kolitch",
"Shawn J.",
"",
"Physics, UCSB"
],
[
"Eardley",
"Douglas M.",
"",
"ITP, UCSB"
]
] | This paper studies the decay of a large, closed domain wall in a closed universe. Such walls can form in the presence of a broken, discrete symmetry. We introduce a novel process of quantum decay for such a wall, in which the vacuum fluctuates from one discrete state to another throughout one half of the universe, so t... |
1410.6882 | Karl Wette | Karl Wette | Lattice template placement for coherent all-sky searches for
gravitational-wave pulsars | 16 pages, 14 figures | Phys. Rev. D 90, 122010 (2014) | 10.1103/PhysRevD.90.122010 | AEI-2014-052, LIGO-P1400202 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | All-sky, broadband, coherent searches for gravitational-wave pulsars are
restricted by limited computational resources. Minimizing the number of
templates required to cover the search parameter space, of sky position and
frequency evolution, is one important way to reduce the computational cost of a
search. We demons... | [
{
"created": "Sat, 25 Oct 2014 04:16:46 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Dec 2014 09:20:51 GMT",
"version": "v2"
}
] | 2015-01-05 | [
[
"Wette",
"Karl",
""
]
] | All-sky, broadband, coherent searches for gravitational-wave pulsars are restricted by limited computational resources. Minimizing the number of templates required to cover the search parameter space, of sky position and frequency evolution, is one important way to reduce the computational cost of a search. We demonstr... |
0912.2181 | Vladimir Krechet G | V. G. Krechet, D. V. Sadovnikov | Spin-spin interaction in general relativity and induced geometries with
nontrivial topology | 4 two-column pages, no figures | Grav. Cosmol.15:337-340,2009 | 10.1134/S0202289309040082 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the dynamics of a self-gravitating spinor field and a
self-gravitating rotating perfect fluid. It is shown that both these matter
distributions can induce a vortex field described by the curl 4-vector of a
tetrad: $\omega^i = \frac12\eps^{iklm}e_{(a)k}e^{(a)}_{l;m}$, where $e^{(a)}_k$
are components of th... | [
{
"created": "Fri, 11 Dec 2009 09:55:46 GMT",
"version": "v1"
}
] | 2015-05-14 | [
[
"Krechet",
"V. G.",
""
],
[
"Sadovnikov",
"D. V.",
""
]
] | We consider the dynamics of a self-gravitating spinor field and a self-gravitating rotating perfect fluid. It is shown that both these matter distributions can induce a vortex field described by the curl 4-vector of a tetrad: $\omega^i = \frac12\eps^{iklm}e_{(a)k}e^{(a)}_{l;m}$, where $e^{(a)}_k$ are components of the ... |
1209.0396 | Mariano Celada | Mariano Celada and Merced Montesinos | Lorentz-covariant Hamiltonian analysis of BF gravity with the Immirzi
parameter | LaTeX file, no figures | Class.Quant.Grav.29:205010,2012 | 10.1088/0264-9381/29/20/205010 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform the Lorentz-covariant Hamiltonian analysis of two Lagrangian
action principles that describe general relativity as a constrained BF theory
and that include the Immirzi parameter. The relation between these two
Lagrangian actions has been already studied through a map among the fields
involved. The main dif... | [
{
"created": "Mon, 3 Sep 2012 16:23:34 GMT",
"version": "v1"
}
] | 2012-09-04 | [
[
"Celada",
"Mariano",
""
],
[
"Montesinos",
"Merced",
""
]
] | We perform the Lorentz-covariant Hamiltonian analysis of two Lagrangian action principles that describe general relativity as a constrained BF theory and that include the Immirzi parameter. The relation between these two Lagrangian actions has been already studied through a map among the fields involved. The main diffe... |
0803.3661 | Chao-Guang Huang | Zhe Chang, Cheng-Bo Guan, Chao-Guang Huang, and Xin Li | Gravitational collapse of a spherical star with heat flow as a possible
energy mechanism of gamma-ray bursts | 4 pages, 2 figures, to appear in Commun. Theor. Phys | Commun.Theor.Phys.50:271-274,2008 | 10.1088/0253-6102/50/1/52 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the gravitational collapse of a spherically symmetric,
inhomogeneous star, which is described by a perfect fluid with heat flow and
satisfies the equation of state $p=\rho/3$ at its center. In the process of the
gravitational collapsing, the energy of the whole star is emitted into space.
And the remai... | [
{
"created": "Wed, 26 Mar 2008 03:06:50 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Chang",
"Zhe",
""
],
[
"Guan",
"Cheng-Bo",
""
],
[
"Huang",
"Chao-Guang",
""
],
[
"Li",
"Xin",
""
]
] | We investigate the gravitational collapse of a spherically symmetric, inhomogeneous star, which is described by a perfect fluid with heat flow and satisfies the equation of state $p=\rho/3$ at its center. In the process of the gravitational collapsing, the energy of the whole star is emitted into space. And the remaini... |
1111.7195 | Steffen Gielen | Steffen Gielen, Derek K. Wise | Spontaneously broken Lorentz symmetry for Hamiltonian gravity | 10 pages, revtex, APS style; v2: extended discussion of relation to
approaches using second class constraints in abstract/introduction, made some
additional small corrections; v3: fixed abstract; v4: minimal changes to
match published version | Phys. Rev. D 85, 104013 (2012) | 10.1103/PhysRevD.85.104013 | AEI-2011-87 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Ashtekar's Hamiltonian formulation of general relativity, and in loop
quantum gravity, Lorentz covariance is a subtle issue that has been strongly
debated. Maintaining manifest Lorentz covariance seems to require introducing
either complex-valued fields, presenting a significant obstacle to
quantization, or additi... | [
{
"created": "Wed, 30 Nov 2011 15:00:27 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Dec 2011 15:43:44 GMT",
"version": "v2"
},
{
"created": "Fri, 13 Jan 2012 17:12:10 GMT",
"version": "v3"
},
{
"created": "Thu, 10 May 2012 01:18:51 GMT",
"version": "v4"
}
] | 2012-06-01 | [
[
"Gielen",
"Steffen",
""
],
[
"Wise",
"Derek K.",
""
]
] | In Ashtekar's Hamiltonian formulation of general relativity, and in loop quantum gravity, Lorentz covariance is a subtle issue that has been strongly debated. Maintaining manifest Lorentz covariance seems to require introducing either complex-valued fields, presenting a significant obstacle to quantization, or addition... |
1603.02659 | Amin Salehi | Amin Salehi and Mohammad Reza Setare | Searching for Cosmological Preferred Axis using cosmographic approach | 21 pages,11 figures | Gen Relativ Gravit (2017) 49:147 | 10.1007/s10714-017-2316-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent released Planck data and other astronomical observations show that the
universe may be anisotropic on large scales. This hints a cosmological
privileged axis in our anisotropic expanding universe. This paper proceeds a
modified redshift in anisotropic cosmological model as $
1+\tilde{z}(t,\hat{\textbf{p}})=\fr... | [
{
"created": "Tue, 8 Mar 2016 20:17:00 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Apr 2016 17:59:20 GMT",
"version": "v2"
}
] | 2017-11-29 | [
[
"Salehi",
"Amin",
""
],
[
"Setare",
"Mohammad Reza",
""
]
] | Recent released Planck data and other astronomical observations show that the universe may be anisotropic on large scales. This hints a cosmological privileged axis in our anisotropic expanding universe. This paper proceeds a modified redshift in anisotropic cosmological model as $ 1+\tilde{z}(t,\hat{\textbf{p}})=\frac... |
1206.4374 | Sandro D. P. Vitenti | S. D. P. Vitenti, F. T. Falciano, N. Pinto-Neto | Quantum Cosmological Perturbations of Generic Fluids in Quantum
Universes | 19 pages, revtex4-1, submitted to PRD, expanded discussion about our
method, fixed typos | Phys. Rev. D 87, 103503 (2013) | 10.1103/PhysRevD.87.103503 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In previous works, it was shown that the Lagrangians and Hamiltonians of
cosmological linear scalar, vector and tensor perturbations of homogeneous and
isotropic space-times with flat spatial sections containing a perfect fluid can
be put in a simple form through the implementation of canonical transformations
and re... | [
{
"created": "Wed, 20 Jun 2012 02:34:46 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Mar 2013 20:01:17 GMT",
"version": "v2"
},
{
"created": "Fri, 10 May 2013 21:52:36 GMT",
"version": "v3"
}
] | 2013-05-14 | [
[
"Vitenti",
"S. D. P.",
""
],
[
"Falciano",
"F. T.",
""
],
[
"Pinto-Neto",
"N.",
""
]
] | In previous works, it was shown that the Lagrangians and Hamiltonians of cosmological linear scalar, vector and tensor perturbations of homogeneous and isotropic space-times with flat spatial sections containing a perfect fluid can be put in a simple form through the implementation of canonical transformations and rede... |
gr-qc/0001028 | Kiyoshi Shiraishi | Yoshitaka Degura and Kiyoshi Shiraishi (Yamaguchi University) | Finite Temperature Field Theory of "Extreme Black Holes" | 8 pages, 5 eps files, LaTeX2e with the standard packages amssymb,
graphicx, psfrag, Presented at The 9th Workshop on General Relativity and
Gravitation, Hiroshima Univ., Japan, Nov. 3-6, 1999 | null | null | null | gr-qc | null | We treat the model which describes "extreme black holes" moving slowly. We
derive an effective lagrangian in the low energy for this model and then
investigate a statistical behavior of "extreme black holes" in the finite
temperature.
| [
{
"created": "Tue, 11 Jan 2000 10:41:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Degura",
"Yoshitaka",
"",
"Yamaguchi University"
],
[
"Shiraishi",
"Kiyoshi",
"",
"Yamaguchi University"
]
] | We treat the model which describes "extreme black holes" moving slowly. We derive an effective lagrangian in the low energy for this model and then investigate a statistical behavior of "extreme black holes" in the finite temperature. |
1902.04852 | Giuseppe Alberti | Giuseppe Alberti | On the dynamical instability of self-gravitating systems | 6 pages, 3 figures. To be published in the proceedings of the 15th
Marcel Grossmann Meeting | The Fifteenth Marcel Grossmann Meeting, pp. 1298-1303 (2022) | 10.1142/9789811258251_0185 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the dynamical stability of self-gravitating systems in presence of
anisotropy. In particular, we introduce a stability criterion, in terms of the
adiabatic local index, that generalizes the stability condition $<\gamma> \geq
4/3$ of the isotropic regime. Also, we discuss some applications of the
criterion.
| [
{
"created": "Wed, 13 Feb 2019 10:51:39 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Mar 2019 08:57:56 GMT",
"version": "v2"
}
] | 2022-06-29 | [
[
"Alberti",
"Giuseppe",
""
]
] | We study the dynamical stability of self-gravitating systems in presence of anisotropy. In particular, we introduce a stability criterion, in terms of the adiabatic local index, that generalizes the stability condition $<\gamma> \geq 4/3$ of the isotropic regime. Also, we discuss some applications of the criterion. |
0909.2439 | Edward Anderson | Edward Anderson | Shape Space Methods for Quantum Cosmological Triangleland | A shorter version, as per the first stage in the refereeing process,
and containing some new references | Gen.Rel.Grav.43:1529-1548,2011 | 10.1007/s10714-010-1140-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With toy modelling of conceptual aspects of quantum cosmology and the problem
of time in quantum gravity in mind, I study the classical and quantum dynamics
of the pure-shape (i.e. scale-free) triangle formed by 3 particles in 2-d. I do
so by importing techniques to the triangle model from the corresponding 4
particl... | [
{
"created": "Sun, 13 Sep 2009 19:27:39 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Oct 2010 13:04:44 GMT",
"version": "v2"
}
] | 2011-04-22 | [
[
"Anderson",
"Edward",
""
]
] | With toy modelling of conceptual aspects of quantum cosmology and the problem of time in quantum gravity in mind, I study the classical and quantum dynamics of the pure-shape (i.e. scale-free) triangle formed by 3 particles in 2-d. I do so by importing techniques to the triangle model from the corresponding 4 particles... |
2209.05936 | Bart{\l}omiej B\k{a}k | B. B\k{a}k, J. Kijowski | How the non-metricity of the connection arises naturally in the
classical theory of gravity | 43 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Spacetime geometry is described by two -- {\em a priori} independent --
geometric structures: the symmetric connection $\Gamma$ and the metric tensor
$g$. Metricity condition of $\Gamma$ (i.e. $\nabla g = 0$) is implied by the
Palatini variational principle, but only when the matter fields belong to an
exceptional cl... | [
{
"created": "Tue, 6 Sep 2022 18:42:40 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Mar 2024 17:46:20 GMT",
"version": "v2"
}
] | 2024-03-15 | [
[
"Bąk",
"B.",
""
],
[
"Kijowski",
"J.",
""
]
] | Spacetime geometry is described by two -- {\em a priori} independent -- geometric structures: the symmetric connection $\Gamma$ and the metric tensor $g$. Metricity condition of $\Gamma$ (i.e. $\nabla g = 0$) is implied by the Palatini variational principle, but only when the matter fields belong to an exceptional clas... |
1606.06106 | Saheb Soroushfar | Sobhan Kazempour, Reza Saffari, Saheb Soroushfar | Analytical solutions of the geodesic equation in the (rotating) black
string-(anti-) de sitter spacetime | 36 pages,3 tables,36 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we add a compact dimension to Schwarzschild-(anti-) de sitter
and Kerr-(anti-) de sitter spacetimes, which describes (rotating) black
string-(anti-) de sitter spacetime. We study the geodesic motion of test
particles and light rays in this spacetime. We present the analytical solutions
of the geodesic e... | [
{
"created": "Mon, 20 Jun 2016 13:20:01 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Oct 2017 08:30:24 GMT",
"version": "v2"
}
] | 2017-10-16 | [
[
"Kazempour",
"Sobhan",
""
],
[
"Saffari",
"Reza",
""
],
[
"Soroushfar",
"Saheb",
""
]
] | In this paper we add a compact dimension to Schwarzschild-(anti-) de sitter and Kerr-(anti-) de sitter spacetimes, which describes (rotating) black string-(anti-) de sitter spacetime. We study the geodesic motion of test particles and light rays in this spacetime. We present the analytical solutions of the geodesic equ... |
1503.01926 | Tetsuya Shiromizu | Yoshimune Tomikawa, Keisuke Izumi, Tetsuya Shiromizu | New definition of wormhole throat | 7 pages | null | 10.1103/PhysRevD.91.104008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new definition of the wormhole throat including the flare-out
condition and the traversability for general dynamical spacetimes in terms of
null geodesic congruences. We will examine our definition for some examples and
see advantages compared to the others.
| [
{
"created": "Fri, 6 Mar 2015 11:41:47 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Tomikawa",
"Yoshimune",
""
],
[
"Izumi",
"Keisuke",
""
],
[
"Shiromizu",
"Tetsuya",
""
]
] | We present a new definition of the wormhole throat including the flare-out condition and the traversability for general dynamical spacetimes in terms of null geodesic congruences. We will examine our definition for some examples and see advantages compared to the others. |
1808.05842 | Marios Christodoulou | Marios Christodoulou, Carlo Rovelli | On the possibility of laboratory evidence for quantum superposition of
geometries | 6 pages, 1 figure | Physics Letters B, Volume 792, 10 May 2019, Pages 64-68 | 10.1016/j.physletb.2019.03.015 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the recent proposal of measuring a quantum gravity phenomenon in
the lab by entangling two particles gravitationally. We give a generally
covariant description of this phenomenon, where the relevant effect turns out
to be a quantum superposition of proper times. We point out that measurement of
this effect... | [
{
"created": "Fri, 17 Aug 2018 12:47:50 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Oct 2019 11:16:07 GMT",
"version": "v2"
}
] | 2019-10-16 | [
[
"Christodoulou",
"Marios",
""
],
[
"Rovelli",
"Carlo",
""
]
] | We analyze the recent proposal of measuring a quantum gravity phenomenon in the lab by entangling two particles gravitationally. We give a generally covariant description of this phenomenon, where the relevant effect turns out to be a quantum superposition of proper times. We point out that measurement of this effect w... |
1201.4277 | Branislav Cvetkovi\'c | Milutin Blagojevi\'c and Branislav Cvetkovi\'c | 3D gravity with propagating torsion: the AdS sector | LATEX, 20 pages | Phys.Rev. D85 (2012) 104003 | 10.1103/PhysRevD.85.104003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the general parity-preserving model of three-dimensional gravity
with propagating torsion, with a focus on its nonlinear dynamics in the AdS
sector. The model is shown to posses the black hole with torsion as a vacuum
solution, provided we adopt certain restrictions on its coupling constants. The
canonical a... | [
{
"created": "Fri, 20 Jan 2012 12:24:19 GMT",
"version": "v1"
}
] | 2012-06-21 | [
[
"Blagojević",
"Milutin",
""
],
[
"Cvetković",
"Branislav",
""
]
] | We study the general parity-preserving model of three-dimensional gravity with propagating torsion, with a focus on its nonlinear dynamics in the AdS sector. The model is shown to posses the black hole with torsion as a vacuum solution, provided we adopt certain restrictions on its coupling constants. The canonical ana... |
2203.05909 | Mikael Normann | Shabnam Beheshti, Mikael Normann and Juan Valiente Kroon | Future stability of self-gravitating dust balls in an expanding universe | 17 pages | null | 10.1103/PhysRevD.105.124027 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider a system representing self-gravitating balls of dust in an
expanding Universe. It is demonstrated that one can prescribe data for such a
system at infinity and evolve it backward in time without the development of
shocks or singularities. The resulting solution to the Einstein-lambda-dust
equations exists... | [
{
"created": "Fri, 11 Mar 2022 13:29:25 GMT",
"version": "v1"
}
] | 2022-06-29 | [
[
"Beheshti",
"Shabnam",
""
],
[
"Normann",
"Mikael",
""
],
[
"Kroon",
"Juan Valiente",
""
]
] | We consider a system representing self-gravitating balls of dust in an expanding Universe. It is demonstrated that one can prescribe data for such a system at infinity and evolve it backward in time without the development of shocks or singularities. The resulting solution to the Einstein-lambda-dust equations exists f... |
2211.08839 | Enrico Laudato | Enrico Laudato, Vincenzo Salzano | DHOST gravity in Ultra-diffuse galaxies -- Part II: NGC 1052-DF4 and
Dragonfly 44 | 17 pages, 3 tables, 5 figures. Comments are welcome | null | 10.1140/epjc/s10052-023-11564-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ultra-Diffuse galaxies are gravitational systems with quite varied
properties. On one hand we have cases like DF2 and DF4, both observed by the
Dragonfly Array Telescope, claimed to be highly-deficient in dark matter. On
the other hand, we have also observed dark matter dominated UDGs, such as DF44,
estimated to be a... | [
{
"created": "Wed, 16 Nov 2022 11:39:04 GMT",
"version": "v1"
}
] | 2023-05-31 | [
[
"Laudato",
"Enrico",
""
],
[
"Salzano",
"Vincenzo",
""
]
] | Ultra-Diffuse galaxies are gravitational systems with quite varied properties. On one hand we have cases like DF2 and DF4, both observed by the Dragonfly Array Telescope, claimed to be highly-deficient in dark matter. On the other hand, we have also observed dark matter dominated UDGs, such as DF44, estimated to be at ... |
2102.03235 | Mu-Tao Wang | Po-Ning Chen, Mu-Tao Wang, Ye-Kai Wang, Shing-Tung Yau | Supertranslation invariance of angular momentum | 12 pages, 1 figure | null | null | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | LIGO's successful detection of gravitational waves has revitalized the
theoretical understanding of the angular momentum carried away by gravitational
radiation. An infinite dimensional supertranslation ambiguity has presented an
essential difficulty for decades of study. Recent advances were made to address
and quan... | [
{
"created": "Fri, 5 Feb 2021 15:29:15 GMT",
"version": "v1"
}
] | 2021-02-08 | [
[
"Chen",
"Po-Ning",
""
],
[
"Wang",
"Mu-Tao",
""
],
[
"Wang",
"Ye-Kai",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | LIGO's successful detection of gravitational waves has revitalized the theoretical understanding of the angular momentum carried away by gravitational radiation. An infinite dimensional supertranslation ambiguity has presented an essential difficulty for decades of study. Recent advances were made to address and quanti... |
gr-qc/0701095 | Marco Valerio Battisti | Marco Valerio Battisti and Giovanni Montani | Evolutionary Quantization of Cosmological Models | 5 pages, proceedings od the first Stueckelberg Workshop, to appear on
``Il Nuovo Cimento B'', one affiliation corrected | NuovoCim.B122:179-184,2007 | 10.1393/ncb/i2007-10360-4 | null | gr-qc | null | We consider a Schr\"odinger quantum dynamics for the gravitational field
associated to a FRW spacetime and then we solve the corresponding eigenvalue
problem. We show that, from a phenomenological point of view, an Evolutionary
Quantum Cosmology overlaps the Wheeler-DeWitt approach. We also show how a so
peculiar sol... | [
{
"created": "Tue, 16 Jan 2007 17:02:54 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Feb 2007 13:43:22 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Battisti",
"Marco Valerio",
""
],
[
"Montani",
"Giovanni",
""
]
] | We consider a Schr\"odinger quantum dynamics for the gravitational field associated to a FRW spacetime and then we solve the corresponding eigenvalue problem. We show that, from a phenomenological point of view, an Evolutionary Quantum Cosmology overlaps the Wheeler-DeWitt approach. We also show how a so peculiar solut... |
0807.1011 | Sebastiano Tosto | Sebastiano Tosto | An Analysis of States in the Phase Space: From Quantum Mechanics to
General Relativity | 93 pages, 2 figures | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper has heuristic character. The conceptual frame, based on the
assumption of quantum uncertainty only, has been formerly introduced in two
papers [S. Tosto, Il Nuovo Cimento B, vol. 111, n.2, 1996 and S. Tosto, Il
Nuovo Cimento D, vol. 18, n.12, 1996]. Instead of attempting to increase the
accuracy of some exi... | [
{
"created": "Mon, 7 Jul 2008 13:29:12 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Jan 2009 13:30:39 GMT",
"version": "v2"
},
{
"created": "Mon, 19 Jul 2010 09:19:54 GMT",
"version": "v3"
},
{
"created": "Mon, 24 Oct 2011 09:03:42 GMT",
"version": "v4"
}
] | 2011-10-25 | [
[
"Tosto",
"Sebastiano",
""
]
] | The paper has heuristic character. The conceptual frame, based on the assumption of quantum uncertainty only, has been formerly introduced in two papers [S. Tosto, Il Nuovo Cimento B, vol. 111, n.2, 1996 and S. Tosto, Il Nuovo Cimento D, vol. 18, n.12, 1996]. Instead of attempting to increase the accuracy of some exist... |
1305.6633 | Saurya Das | Saurya Das, S. N. Patitsas (University of Lethbridge) | Can MOND type hypotheses be tested in a free fall laboratory
environment? | 5 pages, revtex, 1 figure. To appear in Physical Review D | Phys. Rev. D87, 107101 (2013) | 10.1103/PhysRevD.87.107101 | null | gr-qc astro-ph.CO astro-ph.GA hep-th physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The extremely small accelerations of objects required for the the onset of
modified Newtonian dynamics, or MOND, makes testing the hypothesis in
conventional terrestrial laboratories virtually impossible. This is due to the
large background acceleration of Earth, which is transmitted to the
acceleration of test objec... | [
{
"created": "Tue, 28 May 2013 21:03:59 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Das",
"Saurya",
"",
"University of Lethbridge"
],
[
"Patitsas",
"S. N.",
"",
"University of Lethbridge"
]
] | The extremely small accelerations of objects required for the the onset of modified Newtonian dynamics, or MOND, makes testing the hypothesis in conventional terrestrial laboratories virtually impossible. This is due to the large background acceleration of Earth, which is transmitted to the acceleration of test objects... |
2403.17595 | James Marsden | James Marsden, Josu C. Aurrekoetxea, Katy Clough, Pedro G. Ferreira | Symmetry restoration and vacuum decay from accretion around black holes | 4 pages, 4 figures, 1 movie: https://youtu.be/c2vcNoX8fVs Comments
welcome! | null | null | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | Vacuum decay and symmetry breaking play an important role in the fundamental
structure of the matter and the evolution of the universe. In this work we
study how the purely classical effect of accretion of fundamental fields onto
black holes can lead to shells of symmetry restoration in the midst of a
symmetry broken... | [
{
"created": "Tue, 26 Mar 2024 11:05:48 GMT",
"version": "v1"
}
] | 2024-03-27 | [
[
"Marsden",
"James",
""
],
[
"Aurrekoetxea",
"Josu C.",
""
],
[
"Clough",
"Katy",
""
],
[
"Ferreira",
"Pedro G.",
""
]
] | Vacuum decay and symmetry breaking play an important role in the fundamental structure of the matter and the evolution of the universe. In this work we study how the purely classical effect of accretion of fundamental fields onto black holes can lead to shells of symmetry restoration in the midst of a symmetry broken p... |
gr-qc/9711037 | Claus Kiefer | A.O. Barvinsky and C. Kiefer | Wheeler-DeWitt equation and Feynman diagrams | 35 pages, LATEX, 1 figure | Nucl.Phys. B526 (1998) 509-539 | 10.1016/S0550-3213(98)00349-6 | Freiburg THEP-97/25 | gr-qc hep-th | null | We present a systematic expansion of all constraint equations in canonical
quantum gravity up to the order of the inverse Planck mass squared. It is
demonstrated that this method generates the conventional Feynman diagrammatic
technique involving graviton loops and vertices. It also reveals explicitly the
back reacti... | [
{
"created": "Tue, 11 Nov 1997 11:31:05 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Barvinsky",
"A. O.",
""
],
[
"Kiefer",
"C.",
""
]
] | We present a systematic expansion of all constraint equations in canonical quantum gravity up to the order of the inverse Planck mass squared. It is demonstrated that this method generates the conventional Feynman diagrammatic technique involving graviton loops and vertices. It also reveals explicitly the back reaction... |
1804.00708 | Eric Poisson | Eamonn Corrigan and Eric Poisson | EZ gauge is singular at the event horizon | 6 pages, revised after referee reports, matches published version | null | 10.1088/1361-6382/aac730 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that the EZ gauge of black-hole perturbation theory, introduced by
the late Steve Detweiler in his exploration of the physical consequences of the
gravitational self-force, is necessarily singular at the event horizon.
| [
{
"created": "Mon, 2 Apr 2018 19:18:19 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Jun 2018 12:23:00 GMT",
"version": "v2"
}
] | 2018-06-27 | [
[
"Corrigan",
"Eamonn",
""
],
[
"Poisson",
"Eric",
""
]
] | We prove that the EZ gauge of black-hole perturbation theory, introduced by the late Steve Detweiler in his exploration of the physical consequences of the gravitational self-force, is necessarily singular at the event horizon. |
2310.01730 | Manuel D. Malaver | Manuel Malaver and Maria Esculpi | Analysis of Local Anisotropy Fluctuations in Compact Objects | 13 pages, 4 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Mathematical modeling within the framework of the general theory of
relativity has been used to explain the behavior and structure of massive
objects as neutron stars, quasars, black holes, pulsars and white dwarfs and
requires finding the exact solutions of the Einstein-Maxwell system. In this
paper we study the eff... | [
{
"created": "Tue, 3 Oct 2023 01:44:59 GMT",
"version": "v1"
}
] | 2023-10-04 | [
[
"Malaver",
"Manuel",
""
],
[
"Esculpi",
"Maria",
""
]
] | Mathematical modeling within the framework of the general theory of relativity has been used to explain the behavior and structure of massive objects as neutron stars, quasars, black holes, pulsars and white dwarfs and requires finding the exact solutions of the Einstein-Maxwell system. In this paper we study the effec... |
2309.05588 | Ming Xin | Yi Zhang, Mingzhe Li, Tong Wang, Xinyi Zhao, Long Ma, Shaobo Fang, and
Ming Xin | Transient analysis of arm locking controller | 24 pages, 24 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Arm locking is one of the key technologies to suppress the laser phase noise
in spaced-based gravitational waves observatories. Since arm locking was
proposed, phase margin criterion was always used as the fundamental design
strategy for the controller development. In this paper, we find that this
empirical method fr... | [
{
"created": "Mon, 11 Sep 2023 16:14:45 GMT",
"version": "v1"
}
] | 2023-09-12 | [
[
"Zhang",
"Yi",
""
],
[
"Li",
"Mingzhe",
""
],
[
"Wang",
"Tong",
""
],
[
"Zhao",
"Xinyi",
""
],
[
"Ma",
"Long",
""
],
[
"Fang",
"Shaobo",
""
],
[
"Xin",
"Ming",
""
]
] | Arm locking is one of the key technologies to suppress the laser phase noise in spaced-based gravitational waves observatories. Since arm locking was proposed, phase margin criterion was always used as the fundamental design strategy for the controller development. In this paper, we find that this empirical method from... |
0903.2424 | Hajime Sotani | Hajime Sotani | Stellar Oscillations in Tensor-Vector-Scalar Theory | accepted in PRD | Phys.Rev.D79:064033,2009 | 10.1103/PhysRevD.79.064033 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An alternative theory of gravity has recently been proposed by Bekenstein,
named Tensor-Vector-Scalar (TeVeS) theory, which can explain many galactic and
cosmological observations without the need for dark matter. Whilst this theory
passes basic solar system tests, and has been scrutinized with considerable
detail in... | [
{
"created": "Fri, 13 Mar 2009 16:26:15 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Sotani",
"Hajime",
""
]
] | An alternative theory of gravity has recently been proposed by Bekenstein, named Tensor-Vector-Scalar (TeVeS) theory, which can explain many galactic and cosmological observations without the need for dark matter. Whilst this theory passes basic solar system tests, and has been scrutinized with considerable detail in o... |
gr-qc/9801101 | Luc Blanchet | Luc Blanchet | On the multipole expansion of the gravitational field | 45 pages, submitted to Class. Quantum Grav | Class.Quant.Grav. 15 (1998) 1971-1999 | 10.1088/0264-9381/15/7/013 | null | gr-qc | null | This paper constructs the multipole expansion (in general relativity) of the
gravitational field generated by a slowly-moving isolated source. We introduce
some definitions for the source multipole moments, valid to all orders in a
post-Newtonian expansion, and depending in a well-defined way on the total
stress-ener... | [
{
"created": "Thu, 29 Jan 1998 15:57:40 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Blanchet",
"Luc",
""
]
] | This paper constructs the multipole expansion (in general relativity) of the gravitational field generated by a slowly-moving isolated source. We introduce some definitions for the source multipole moments, valid to all orders in a post-Newtonian expansion, and depending in a well-defined way on the total stress-energy... |
1911.01937 | Pierre-Henri Chavanis | Pierre-Henri Chavanis | Core mass -- halo mass relation of bosonic and fermionic dark matter
halos harbouring a supermassive black hole | null | Phys. Rev. D 101, 063532 (2020) | 10.1103/PhysRevD.101.063532 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the core mass -- halo mass relation of bosonic dark matter halos, in
the form of self-gravitating Bose-Einstein condensates, harbouring a
supermassive black hole. We use the ``velocity dispersion tracing'' relation
according to which the velocity dispersion in the core $v_c^2\sim GM_c/R_c$ is
of the same ord... | [
{
"created": "Tue, 5 Nov 2019 16:56:06 GMT",
"version": "v1"
}
] | 2020-04-01 | [
[
"Chavanis",
"Pierre-Henri",
""
]
] | We study the core mass -- halo mass relation of bosonic dark matter halos, in the form of self-gravitating Bose-Einstein condensates, harbouring a supermassive black hole. We use the ``velocity dispersion tracing'' relation according to which the velocity dispersion in the core $v_c^2\sim GM_c/R_c$ is of the same order... |
1610.09168 | Helvi Witek | Robert Benkel, Thomas P. Sotiriou, Helvi Witek | Black hole hair formation in shift-symmetric generalised scalar-tensor
gravity | 27 pages, 7 figures, contribution to the Classical and Quantum
Gravity Focus Issue "Hairy black holes", v3 updated acknowledgements | Class.Quant.Grav. 34 (2017) no.6, 064001 | 10.1088/1361-6382/aa5ce7 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A linear coupling between a scalar field and the Gauss-Bonnet invariant is
the only known interaction term between a scalar and the metric that: respects
shift symmetry; does not lead to higher order equations; inevitably introduces
black hole hair in asymptotically flat, 4-dimensional spacetimes. Here we focus
on th... | [
{
"created": "Fri, 28 Oct 2016 11:14:51 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Mar 2017 13:38:24 GMT",
"version": "v2"
},
{
"created": "Wed, 18 Jul 2018 16:08:02 GMT",
"version": "v3"
}
] | 2018-07-19 | [
[
"Benkel",
"Robert",
""
],
[
"Sotiriou",
"Thomas P.",
""
],
[
"Witek",
"Helvi",
""
]
] | A linear coupling between a scalar field and the Gauss-Bonnet invariant is the only known interaction term between a scalar and the metric that: respects shift symmetry; does not lead to higher order equations; inevitably introduces black hole hair in asymptotically flat, 4-dimensional spacetimes. Here we focus on the ... |
2406.11621 | Laxmipriya Pati Miss | Maria-Jose Guzman, Laur J\"arv, Laxmipriya Pati | Exploring the stability of $f(Q)$ cosmology near general relativity
limit with different connections | 25 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we study cosmological spacetime configurations in f(Q) gravity
with nonvanishing symmetric teleparallel connections. It is known that the
spatially flat, homogeneous and isotropic connections can be classified into
three sets. Focusing on two of those, we explore the stability of cosmological
background... | [
{
"created": "Mon, 17 Jun 2024 15:04:32 GMT",
"version": "v1"
}
] | 2024-06-18 | [
[
"Guzman",
"Maria-Jose",
""
],
[
"Järv",
"Laur",
""
],
[
"Pati",
"Laxmipriya",
""
]
] | In this work, we study cosmological spacetime configurations in f(Q) gravity with nonvanishing symmetric teleparallel connections. It is known that the spatially flat, homogeneous and isotropic connections can be classified into three sets. Focusing on two of those, we explore the stability of cosmological background e... |
1107.1005 | Cesar S. Lopez-Monsalvo | C S Lopez-Monsalvo | Covariant Thermodynamics and Relativity | PhD Thesis, School of Mathematics, University of Southampton, UK,
2011 | null | null | null | gr-qc astro-ph.CO math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This thesis deals with the dynamics of irreversible processes within the
context of the general theory of relativity. In particular, we address the
problem of the 'infinite' speed of propagation of thermal disturbances in a
dissipative fluid. The present work builds on the multi-fluid variational
approach to relativi... | [
{
"created": "Wed, 6 Jul 2011 00:21:39 GMT",
"version": "v1"
}
] | 2011-07-07 | [
[
"Lopez-Monsalvo",
"C S",
""
]
] | This thesis deals with the dynamics of irreversible processes within the context of the general theory of relativity. In particular, we address the problem of the 'infinite' speed of propagation of thermal disturbances in a dissipative fluid. The present work builds on the multi-fluid variational approach to relativist... |
2205.04926 | Octavian Micu | Roberto Casadio, Iber\^e Kuntz and Octavian Micu | Approximating compact objects in bootstrapped Newtonian gravity: use of
the canonical potential | 15 pages, 5 figures | Eur. Phys. J. C (2022) 82:609 | 10.1140/epjc/s10052-022-10570-z | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider compact objects in a classical and non-relativistic
generalisation of Newtonian gravity, dubbed bootstrapped Newtonian theory,
which includes higher-order derivative interaction terms of the kind
generically present in the strong-field regime of gravity. By means of a field
redefinition, the original boot... | [
{
"created": "Tue, 10 May 2022 14:31:11 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jul 2022 12:16:08 GMT",
"version": "v2"
}
] | 2022-07-14 | [
[
"Casadio",
"Roberto",
""
],
[
"Kuntz",
"Iberê",
""
],
[
"Micu",
"Octavian",
""
]
] | We consider compact objects in a classical and non-relativistic generalisation of Newtonian gravity, dubbed bootstrapped Newtonian theory, which includes higher-order derivative interaction terms of the kind generically present in the strong-field regime of gravity. By means of a field redefinition, the original bootst... |
1506.02504 | Ulrich Jentschura | J. H. Noble and U. D. Jentschura | Ultrarelativistic Decoupling Transformation for Generalized Dirac
Equations | 10 pages; RevTeX; Phys. Rev. A, in press | Phys.Rev.A 92 (2015) 012101 | 10.1103/PhysRevA.92.012101 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Foldy--Wouthuysen transformation is known to uncover the nonrelativistic
limit of a generalized Dirac Hamiltonian, lending an intuitive physical
interpretation to the effective operators within Schr\"{o}dinger--Pauli theory.
We here discuss the opposite, ultrarelativistic limit which requires the use of
a fundame... | [
{
"created": "Fri, 5 Jun 2015 19:30:11 GMT",
"version": "v1"
}
] | 2015-07-30 | [
[
"Noble",
"J. H.",
""
],
[
"Jentschura",
"U. D.",
""
]
] | The Foldy--Wouthuysen transformation is known to uncover the nonrelativistic limit of a generalized Dirac Hamiltonian, lending an intuitive physical interpretation to the effective operators within Schr\"{o}dinger--Pauli theory. We here discuss the opposite, ultrarelativistic limit which requires the use of a fundament... |
2401.08498 | Zohreh Nekouee | Manjunath Malligawad, S. K. Narasimhamurthy, Z. Nekouee, Rajesh Kumar,
Mallikarjun Y. Kumbar | Traversable wormholes in Finsler geometry under conformal motion | 32 pages, 13 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | This paper aims to investigate the possibility of physically achievable new
wormhole solutions within the context of Finsler geometry by focusing on
conformal motion. For this purpose, we study the barotropic linear equation of
state (EoS). We scrutinized their geometric features within the EoS model,
which includes ... | [
{
"created": "Tue, 16 Jan 2024 16:57:49 GMT",
"version": "v1"
}
] | 2024-01-17 | [
[
"Malligawad",
"Manjunath",
""
],
[
"Narasimhamurthy",
"S. K.",
""
],
[
"Nekouee",
"Z.",
""
],
[
"Kumar",
"Rajesh",
""
],
[
"Kumbar",
"Mallikarjun Y.",
""
]
] | This paper aims to investigate the possibility of physically achievable new wormhole solutions within the context of Finsler geometry by focusing on conformal motion. For this purpose, we study the barotropic linear equation of state (EoS). We scrutinized their geometric features within the EoS model, which includes ba... |
gr-qc/0005090 | V. Guruprasad | V Guruprasad | Contraction and distension by tidal stress and its role as the cause of
the Hubble redshift | 9 pages, 4 figs. Fig 1 ack added | null | null | null | gr-qc | null | I show that a cumulative contraction or expansion must result from repetitive
tidal action in a curved stress field, depending on the direction of the
curvature. The resulting expansion of solid materials onboard deep space probes
and the corresponding contraction on earth would be of the right magnitude to
account f... | [
{
"created": "Fri, 19 May 2000 19:56:05 GMT",
"version": "v1"
},
{
"created": "Mon, 22 May 2000 15:17:52 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Guruprasad",
"V",
""
]
] | I show that a cumulative contraction or expansion must result from repetitive tidal action in a curved stress field, depending on the direction of the curvature. The resulting expansion of solid materials onboard deep space probes and the corresponding contraction on earth would be of the right magnitude to account for... |
1512.03098 | Muhammad Sharif | M. Sharif and Saadia Mumtaz | Dynamical Instability of Gaseous Sphere in the Reissner-Nordstrom Limit | 26 pages, 6 figures | Gen. Relativ. Gravit. 48 (2016) 92 | 10.1007/s10714-016-2090-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the dynamical instability of gaseous sphere under
radial oscillations approaching the Reissner-Nordstr\"om limit. For this
purpose, we derive linearized perturbed equation of motion following the
Eulerian and Lagrangian approaches. We formulate perturbed pressure in terms of
adiabatic index by... | [
{
"created": "Sun, 6 Dec 2015 13:27:12 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jun 2016 02:18:51 GMT",
"version": "v2"
}
] | 2016-06-29 | [
[
"Sharif",
"M.",
""
],
[
"Mumtaz",
"Saadia",
""
]
] | In this paper, we study the dynamical instability of gaseous sphere under radial oscillations approaching the Reissner-Nordstr\"om limit. For this purpose, we derive linearized perturbed equation of motion following the Eulerian and Lagrangian approaches. We formulate perturbed pressure in terms of adiabatic index by e... |
0902.3900 | Tsunehiro Kobayashi | Tsunehiro Kobayashi | Massless fields infinitely degenerating with respect to the helicity and
their effects in astrophysics | 10pages, no figure | Acta Phys.Polon.B40:2865-2875,2009 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A tachyon field having a negative squared-mass $-m_t^2$ can be described in
terms of massless fields degenerating infinitely with respect to the helicity.
The degeneracy leads symmetry breakings of space-time. This picture for the
tachyon does not contradict causality. The tachyon vector-field is quenched
from the in... | [
{
"created": "Mon, 23 Feb 2009 12:38:56 GMT",
"version": "v1"
}
] | 2010-02-01 | [
[
"Kobayashi",
"Tsunehiro",
""
]
] | A tachyon field having a negative squared-mass $-m_t^2$ can be described in terms of massless fields degenerating infinitely with respect to the helicity. The degeneracy leads symmetry breakings of space-time. This picture for the tachyon does not contradict causality. The tachyon vector-field is quenched from the inte... |
1211.1603 | Nelson da Silva Panza | J.A.Helay\"el Neto and N. Panza | An Effective Torsion Model For Extra Gauge Bosons and Their Mass
Corrections | 8 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | LHC provides a excellent laboratory to probe massive gravitons effects in
scenarios with low scale gravity up to several Tev. Based on this fact, in the
present work we are interested in analyzing the possible constraints on the
free parameters of the gravity Lagrangian in 4 dimensions recently studied in
the referen... | [
{
"created": "Wed, 7 Nov 2012 17:02:39 GMT",
"version": "v1"
}
] | 2016-11-26 | [
[
"Neto",
"J. A. Helayël",
""
],
[
"Panza",
"N.",
""
]
] | LHC provides a excellent laboratory to probe massive gravitons effects in scenarios with low scale gravity up to several Tev. Based on this fact, in the present work we are interested in analyzing the possible constraints on the free parameters of the gravity Lagrangian in 4 dimensions recently studied in the reference... |
2002.02170 | Sebastian Ulbricht | Sebastian Ulbricht, Johannes Dickmann, Robert A. M\"uller, Stefanie
Kroker and Andrey Surzhykov | Gravitational light deflection in Earth-based laser cavity experiments | 7 pages, 5 figures, 1 table | Phys. Rev. D 101, 121501 (2020) | 10.1103/PhysRevD.101.121501 | null | gr-qc physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As known from Einstein's theory of general relativity, the propagation of
light in the presence of a massive object is affected by gravity. In this work,
we discuss whether the effect of gravitational light bending can be observed in
Earth-based experiments, using high-finesse optical cavities. In order to do
this, w... | [
{
"created": "Thu, 6 Feb 2020 09:35:20 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Jul 2020 08:19:12 GMT",
"version": "v2"
}
] | 2020-07-13 | [
[
"Ulbricht",
"Sebastian",
""
],
[
"Dickmann",
"Johannes",
""
],
[
"Müller",
"Robert A.",
""
],
[
"Kroker",
"Stefanie",
""
],
[
"Surzhykov",
"Andrey",
""
]
] | As known from Einstein's theory of general relativity, the propagation of light in the presence of a massive object is affected by gravity. In this work, we discuss whether the effect of gravitational light bending can be observed in Earth-based experiments, using high-finesse optical cavities. In order to do this, we ... |
2107.11524 | Tanmoy Paul | Kazuharu Bamba, Sergei D. Odintsov, Tanmoy Paul, Debaprasad Maity | Helical magnetogenesis with reheating phase from higher curvature
coupling and baryogenesis | "Physics of the Dark Universe" Accepted | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the generation of helical magnetic fields and address the
baryon asymmetry of the universe from an inflationary magnetogenesis scenario,
in which the conformal and parity symmetries of the electromagnetic field are
broken through its coupling to the Ricci scalar and to the Gauss-Bonnet
invariant via th... | [
{
"created": "Sat, 24 Jul 2021 03:56:53 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Apr 2022 09:47:13 GMT",
"version": "v2"
}
] | 2022-04-12 | [
[
"Bamba",
"Kazuharu",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Paul",
"Tanmoy",
""
],
[
"Maity",
"Debaprasad",
""
]
] | We investigate the generation of helical magnetic fields and address the baryon asymmetry of the universe from an inflationary magnetogenesis scenario, in which the conformal and parity symmetries of the electromagnetic field are broken through its coupling to the Ricci scalar and to the Gauss-Bonnet invariant via the ... |
1007.4071 | Lorenzo Fatibene | L.Fatibene, M.Ferraris, M.Francaviglia, L.Lusanna | ADM Pseudotensors, Conserved Quantities and Covariant Conservation Laws
in General Relativity | 40 pages | null | 10.1016/j.aop.2012.02.010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The ADM formalism is reviewed and techniques for decomposing generic
components of metric, connection and curvature are obtained. These techniques
will turn out to be enough to decompose not only Einstein equations but also
covariant conservation laws. Then a number of independent sets of hypotheses
that are sufficie... | [
{
"created": "Fri, 23 Jul 2010 08:45:02 GMT",
"version": "v1"
}
] | 2015-05-19 | [
[
"Fatibene",
"L.",
""
],
[
"Ferraris",
"M.",
""
],
[
"Francaviglia",
"M.",
""
],
[
"Lusanna",
"L.",
""
]
] | The ADM formalism is reviewed and techniques for decomposing generic components of metric, connection and curvature are obtained. These techniques will turn out to be enough to decompose not only Einstein equations but also covariant conservation laws. Then a number of independent sets of hypotheses that are sufficient... |
1901.09770 | Daniela P\'erez | Daniela P\'erez, Gustavo E. Romero, Luciano E. Combi, Eduardo
Guti\'errez | A note on geodesics in inhomogeneous expanding spacetimes | 15 pages, 12 figures, accepted for publication in Classical and
Quantum Gravity | null | 10.1088/1361-6382/ab0189 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are several solutions of Einstein field equations that describe an
inhomogeneity in an expanding universe. Among these solutions, the McVittie
metric and its generalizations have been investigated through decades, though a
full understanding of them is still lacking. In this note, we explore the
trajectories of... | [
{
"created": "Mon, 28 Jan 2019 16:17:17 GMT",
"version": "v1"
}
] | 2019-01-29 | [
[
"Pérez",
"Daniela",
""
],
[
"Romero",
"Gustavo E.",
""
],
[
"Combi",
"Luciano E.",
""
],
[
"Gutiérrez",
"Eduardo",
""
]
] | There are several solutions of Einstein field equations that describe an inhomogeneity in an expanding universe. Among these solutions, the McVittie metric and its generalizations have been investigated through decades, though a full understanding of them is still lacking. In this note, we explore the trajectories of p... |
2108.01448 | Behnam Pourhassan | J. Sadeghi, B. Pourhassan, S. Noori Gashti, E. Naghd Mezerji, A.
Pasqua | Cosmic evolution of the logarithmic f(R) model and the dS swampland
conjecture | 20pages, 5 figures | Universe 2022, 8, 623 | 10.3390/universe8120623 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the inflationary scenario in logarithmic f(R)
gravity, where the rate of inflation roll is constant. On the other hand, our
gravitational f(R) model is a polynomial plus a logarithmic term. We take
advantage of constant-roll conditions and investigate the cosmic evolution of
the logarithmic f(... | [
{
"created": "Sun, 1 Aug 2021 09:59:58 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Sep 2022 18:44:31 GMT",
"version": "v2"
}
] | 2022-12-19 | [
[
"Sadeghi",
"J.",
""
],
[
"Pourhassan",
"B.",
""
],
[
"Gashti",
"S. Noori",
""
],
[
"Mezerji",
"E. Naghd",
""
],
[
"Pasqua",
"A.",
""
]
] | In this paper, we study the inflationary scenario in logarithmic f(R) gravity, where the rate of inflation roll is constant. On the other hand, our gravitational f(R) model is a polynomial plus a logarithmic term. We take advantage of constant-roll conditions and investigate the cosmic evolution of the logarithmic f(R)... |
2105.15073 | Diego Rubiera-Garcia | Merce Guerrero, Gonzalo J. Olmo, Diego Rubiera-Garcia, Diego
S\'aez-Chill\'on G\'omez | Shadows and optical appearance of black bounces illuminated by a thin
accretion disk | 12 pages, 7 figures, 2 tables; v2: minor corrections, references
added | null | 10.1088/1475-7516/2021/08/036 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study the light rings and shadows of an uniparametric family of
spherically symmetric geometries interpolating between the Schwarzschild
solution, a regular black hole, and a traversable wormhole, and dubbed as black
bounces, all of them sharing the same critical impact parameter. We consider
the ray-tracing metho... | [
{
"created": "Mon, 31 May 2021 16:01:26 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Jul 2021 06:44:57 GMT",
"version": "v2"
}
] | 2021-08-25 | [
[
"Guerrero",
"Merce",
""
],
[
"Olmo",
"Gonzalo J.",
""
],
[
"Rubiera-Garcia",
"Diego",
""
],
[
"Gómez",
"Diego Sáez-Chillón",
""
]
] | We study the light rings and shadows of an uniparametric family of spherically symmetric geometries interpolating between the Schwarzschild solution, a regular black hole, and a traversable wormhole, and dubbed as black bounces, all of them sharing the same critical impact parameter. We consider the ray-tracing method ... |
1503.08245 | Yen Chin Ong | Yen Chin Ong | The Persistence of the Large Volumes in Black Holes | Version accepted by Gen. Relativ. Gravit; refs. updated | Gen. Relativ. Gravit. 47 (2015) 88 | 10.1007/s10714-015-1929-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Classically, black holes admit maximal interior volumes that grow
asymptotically linearly in time. We show that such volumes remain large when
Hawking evaporation is taken into account. Even if a charged black hole
approaches the extremal limit during this evolution, its volume continues to
grow; although an exactly ... | [
{
"created": "Fri, 27 Mar 2015 23:55:38 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Mar 2015 19:46:22 GMT",
"version": "v2"
},
{
"created": "Sun, 12 Jul 2015 11:37:49 GMT",
"version": "v3"
},
{
"created": "Sun, 2 Aug 2015 15:06:06 GMT",
"version": "v4"
}
] | 2015-08-04 | [
[
"Ong",
"Yen Chin",
""
]
] | Classically, black holes admit maximal interior volumes that grow asymptotically linearly in time. We show that such volumes remain large when Hawking evaporation is taken into account. Even if a charged black hole approaches the extremal limit during this evolution, its volume continues to grow; although an exactly ex... |
1508.03239 | Anzhong Wang | Tao Zhu, Anzhong Wang, Gerald Cleaver, Klaus Kirsten, Qin Sheng, and
Qiang Wu | Scalar and tensor perturbations in loop quantum cosmology: High-order
corrections | revtex4, one figure. JCAP10 (2015) 052 | JCAP 10 (2015) 052 | 10.1088/1475-7516/2015/10/052 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Loop quantum cosmology (LQC) provides promising resolutions to the
trans-Planckian issue and initial singularity arising in the inflationary
models of general relativity. In general, due to different quantization
approaches, LQC involves two types of quantum corrections, the holonomy and
inverse-volume, to both of th... | [
{
"created": "Wed, 12 Aug 2015 09:57:13 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Oct 2015 20:47:58 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Dec 2015 07:00:10 GMT",
"version": "v3"
}
] | 2015-12-10 | [
[
"Zhu",
"Tao",
""
],
[
"Wang",
"Anzhong",
""
],
[
"Cleaver",
"Gerald",
""
],
[
"Kirsten",
"Klaus",
""
],
[
"Sheng",
"Qin",
""
],
[
"Wu",
"Qiang",
""
]
] | Loop quantum cosmology (LQC) provides promising resolutions to the trans-Planckian issue and initial singularity arising in the inflationary models of general relativity. In general, due to different quantization approaches, LQC involves two types of quantum corrections, the holonomy and inverse-volume, to both of the ... |
1404.2141 | Hoda Farahani | M. Khurshudyan, J. Sadeghi, R. Myrzakulov, A. Pasqua, and H. Farahani | Interacting quintessence dark energy models in Lyra manifold | Accepted by Advances in High Energy Physics. arXiv admin note: text
overlap with arXiv:1303.3436 by other authors | Advances in High Energy Physics 2014 (2014) 878092 | 10.1155/2014/878092 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider two-component dark energy models in Lyra manifold.
The first component is assumed as a quintessence field while the second model
may be a viscous polytropic gas, a viscous Van der Waals gas or a viscous
modified Chaplygin gas. We also consider the possibility of interaction between
componen... | [
{
"created": "Tue, 8 Apr 2014 14:13:49 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Aug 2014 20:13:02 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Aug 2014 16:52:00 GMT",
"version": "v3"
}
] | 2014-09-03 | [
[
"Khurshudyan",
"M.",
""
],
[
"Sadeghi",
"J.",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Pasqua",
"A.",
""
],
[
"Farahani",
"H.",
""
]
] | In this paper, we consider two-component dark energy models in Lyra manifold. The first component is assumed as a quintessence field while the second model may be a viscous polytropic gas, a viscous Van der Waals gas or a viscous modified Chaplygin gas. We also consider the possibility of interaction between components... |
1812.04923 | Bogeun Gwak | Bogeun Gwak | Strong Cosmic Censorship under Quasinormal Modes of Non-Minimally
Coupled Massive Scalar Field | 19 pages, 10 figures, published in EPJC | Eur. Phys. J. C 79, no. 9, 767 (2019) | 10.1140/epjc/s10052-019-7283-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the strong cosmic censorship conjecture in lukewarm
Reissner-Nordstr\"{o}m-de Sitter black holes (and Mart\'{i}nez-Troncoso-Zanelli
black holes) using the quasinormal resonance of non-minimally coupled massive
scalar field. The strong cosmic censorship conjecture is closely related to the
stability of ... | [
{
"created": "Wed, 12 Dec 2018 12:51:52 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Sep 2019 00:14:30 GMT",
"version": "v2"
}
] | 2019-09-20 | [
[
"Gwak",
"Bogeun",
""
]
] | We investigate the strong cosmic censorship conjecture in lukewarm Reissner-Nordstr\"{o}m-de Sitter black holes (and Mart\'{i}nez-Troncoso-Zanelli black holes) using the quasinormal resonance of non-minimally coupled massive scalar field. The strong cosmic censorship conjecture is closely related to the stability of th... |
1109.3499 | David Garfinkle | David Garfinkle | Matters of Gravity, The Newsletter of the Topical Group on Gravitation
of the American Physical Society, Volume 38, Fall 2011 | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | GGR News:
New version of LISA, by Karsten Danzmann
We hear that, by David Garfinkle
Research Briefs:
Finally, results from Gravity Probe B, by Clifford M. Will
Discovery of the highest mass neutron star, by Wynn C.G. Ho
Conference reports:
Numerical relativity beyond astrophysics, by Carsten Gundlac
C... | [
{
"created": "Thu, 15 Sep 2011 22:11:22 GMT",
"version": "v1"
}
] | 2011-09-19 | [
[
"Garfinkle",
"David",
""
]
] | GGR News: New version of LISA, by Karsten Danzmann We hear that, by David Garfinkle Research Briefs: Finally, results from Gravity Probe B, by Clifford M. Will Discovery of the highest mass neutron star, by Wynn C.G. Ho Conference reports: Numerical relativity beyond astrophysics, by Carsten Gundlac Cold materials, hot... |
2203.10931 | Bilel Ben-Salem | Bilel Ben-Salem and Eva Hackmann | Relativistic propagation and frame dragging time delay in the timing of
a pulsar orbiting the supermassive black hole SgrA* | 14 pages, 9 figures | MNRAS, Volume 516, Issue 2, October 2022 | 10.1093/mnras/stac2337 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Timing a pulsar in a close orbit around the supermassive black hole SgrA* at
the center of the Milky Way would open the window for an accurate determination
of the black hole parameters and for new tests of General Relativity and
alternative modified gravity theories. An important relativistic effect which
has to be ... | [
{
"created": "Mon, 21 Mar 2022 12:51:36 GMT",
"version": "v1"
}
] | 2022-12-06 | [
[
"Ben-Salem",
"Bilel",
""
],
[
"Hackmann",
"Eva",
""
]
] | Timing a pulsar in a close orbit around the supermassive black hole SgrA* at the center of the Milky Way would open the window for an accurate determination of the black hole parameters and for new tests of General Relativity and alternative modified gravity theories. An important relativistic effect which has to be ta... |
1211.2360 | Xiang-Song Chen | Xiang-Song Chen | Inertial mass = gravitational mass, what about momentum? | 4 pages, 1 figure; typo corrected, reference added to new development
after appearance of the first version | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been tested precisely that the inertial and gravitational masses are
equal. Here we reveal that the inertial and gravitational momenta may differ.
More generally, the inertial and gravitational energy-momentum tensors may not
coincide: Einstein's general relativity requires the gravitational
energy-momentum te... | [
{
"created": "Sat, 10 Nov 2012 23:51:57 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Nov 2012 08:37:57 GMT",
"version": "v2"
}
] | 2012-11-21 | [
[
"Chen",
"Xiang-Song",
""
]
] | It has been tested precisely that the inertial and gravitational masses are equal. Here we reveal that the inertial and gravitational momenta may differ. More generally, the inertial and gravitational energy-momentum tensors may not coincide: Einstein's general relativity requires the gravitational energy-momentum tens... |
1504.07856 | Golam Mortuza Hossain | Golam Mortuza Hossain and Gopal Sardar | Violation of Kubo-Martin-Schwinger condition along a Rindler trajectory
in polymer quantization | 6 pages, revtex4; v2 few clarifications on domain of perturbation
added; v3 initials in title expanded, few discussions and a reference are
added, to match with the published version | Phys. Rev. D 92 (2015) 2, 024018 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Existence of Unruh effect is often understood from the property of two-point
function along Rindler trajectory where it satisfies KMS condition. In
particular, it exhibits the so-called KMS periodicity along imaginary time
direction. Corresponding period is then identified with reciprocal of Unruh
temperature times B... | [
{
"created": "Wed, 29 Apr 2015 13:39:57 GMT",
"version": "v1"
},
{
"created": "Mon, 4 May 2015 12:45:33 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Oct 2015 10:52:06 GMT",
"version": "v3"
}
] | 2015-10-27 | [
[
"Hossain",
"Golam Mortuza",
""
],
[
"Sardar",
"Gopal",
""
]
] | Existence of Unruh effect is often understood from the property of two-point function along Rindler trajectory where it satisfies KMS condition. In particular, it exhibits the so-called KMS periodicity along imaginary time direction. Corresponding period is then identified with reciprocal of Unruh temperature times Bol... |
1407.1630 | Gil Jannes | C. Garc\'ia-Meca, S. Carloni, C. Barcel\'o, G. Jannes, J.
S\'anchez-Dehesa, A. Mart\'inez | Analogue transformation acoustics and the compression of spacetime | 17 pages 4 figures. Accepted for publication in Photon. Nanostruct.
Fundam. Appl | Photon. Nanostruct. Fundam. Appl. 12, 312 (2014) | 10.1016/j.photonics.2014.05.001 | null | gr-qc cond-mat.mes-hall cond-mat.mtrl-sci | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A recently developed technique known as analogue transformation acoustics has
allowed the extension of the transformational paradigm to general spacetime
transformations under which the acoustic equations are not form invariant. In
this paper, we review the fundamentals of analogue transformation acoustics and
show h... | [
{
"created": "Mon, 7 Jul 2014 09:02:57 GMT",
"version": "v1"
}
] | 2014-09-17 | [
[
"García-Meca",
"C.",
""
],
[
"Carloni",
"S.",
""
],
[
"Barceló",
"C.",
""
],
[
"Jannes",
"G.",
""
],
[
"Sánchez-Dehesa",
"J.",
""
],
[
"Martínez",
"A.",
""
]
] | A recently developed technique known as analogue transformation acoustics has allowed the extension of the transformational paradigm to general spacetime transformations under which the acoustic equations are not form invariant. In this paper, we review the fundamentals of analogue transformation acoustics and show how... |
2205.07787 | Sunny Vagnozzi | Sunny Vagnozzi, Rittick Roy, Yu-Dai Tsai, Luca Visinelli, Misba Afrin,
Alireza Allahyari, Parth Bambhaniya, Dipanjan Dey, Sushant G. Ghosh, Pankaj
S. Joshi, Kimet Jusufi, Mohsen Khodadi, Rahul Kumar Walia, Ali \"Ovg\"un,
Cosimo Bambi | Horizon-scale tests of gravity theories and fundamental physics from the
Event Horizon Telescope image of Sagittarius A$^*$ | 82 pages, 47 figures, 50+ models tested. v3: fixed a few figures,
clarified several points, included various analytical expressions for shadow
sizes within the different models, added a few references, included a summary
table (Table II). Version accepted for publication in Classical and Quantum
Gravity | Class. Quant. Grav. 40 (2023) 165007 | 10.1088/1361-6382/acd97b | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Horizon-scale images of black holes (BHs) and their shadows have opened an
unprecedented window onto tests of gravity and fundamental physics in the
strong-field regime. We consider a wide range of well-motivated deviations from
classical General Relativity (GR) BH solutions, and constrain them using the
Event Horizo... | [
{
"created": "Mon, 16 May 2022 16:22:56 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Aug 2022 12:49:36 GMT",
"version": "v2"
},
{
"created": "Fri, 26 May 2023 11:55:37 GMT",
"version": "v3"
}
] | 2023-07-20 | [
[
"Vagnozzi",
"Sunny",
""
],
[
"Roy",
"Rittick",
""
],
[
"Tsai",
"Yu-Dai",
""
],
[
"Visinelli",
"Luca",
""
],
[
"Afrin",
"Misba",
""
],
[
"Allahyari",
"Alireza",
""
],
[
"Bambhaniya",
"Parth",
""
],
[
... | Horizon-scale images of black holes (BHs) and their shadows have opened an unprecedented window onto tests of gravity and fundamental physics in the strong-field regime. We consider a wide range of well-motivated deviations from classical General Relativity (GR) BH solutions, and constrain them using the Event Horizon ... |
gr-qc/0605013 | Roman Konoplya | R. A. Konoplya, A. Zhidenko | Stability and quasinormal modes of the massive scalar field around Kerr
black holes | 3 figures, RevTex | Phys.Rev. D73 (2006) 124040 | 10.1103/PhysRevD.73.124040 | null | gr-qc | null | We find quasinormal spectrum of the massive scalar field in the background of
the Kerr black holes. We show that all found modes are damped under the
quasinormal modes boundary conditions when $\mu M$ is not large, thereby
implying stability of the massive scalar field. This complements the region of
stability determ... | [
{
"created": "Mon, 1 May 2006 20:55:31 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | We find quasinormal spectrum of the massive scalar field in the background of the Kerr black holes. We show that all found modes are damped under the quasinormal modes boundary conditions when $\mu M$ is not large, thereby implying stability of the massive scalar field. This complements the region of stability determin... |
1806.02182 | Hiroki Takeda | Hiroki Takeda, Atsushi Nishizawa, Yuta Michimura, Koji Nagano, Kentaro
Komori, Masaki Ando, Kazuhiro Hayama | Polarization test of gravitational waves from compact binary
coalescences | 10 pages, 8 figures | Phys. Rev. D 98, 022008 (2018) | 10.1103/PhysRevD.98.022008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves have only two polarization modes in General Relativity.
However, there are six possible modes of polarization in metric theory of
gravity in general. The tests of gravitational waves polarization can be tools
for pursuing the nature of space-time structure. The observations of
gravitational waves ... | [
{
"created": "Mon, 4 Jun 2018 18:00:17 GMT",
"version": "v1"
}
] | 2018-07-19 | [
[
"Takeda",
"Hiroki",
""
],
[
"Nishizawa",
"Atsushi",
""
],
[
"Michimura",
"Yuta",
""
],
[
"Nagano",
"Koji",
""
],
[
"Komori",
"Kentaro",
""
],
[
"Ando",
"Masaki",
""
],
[
"Hayama",
"Kazuhiro",
""
]
] | Gravitational waves have only two polarization modes in General Relativity. However, there are six possible modes of polarization in metric theory of gravity in general. The tests of gravitational waves polarization can be tools for pursuing the nature of space-time structure. The observations of gravitational waves wi... |
1604.01580 | Carlos Eduardo Cede\~no Monta\~na | C. E. Cede\~no M. and J. C. N. de Araujo | Gravitational radiation by point particle eccentric binary systems in
the linearised characteristic formulation of general relativity | 16 pages, 2 figures, DOI 10.1007/s10714-016-2038-1 | Gen Relativ Gravit (2016) 48:45 | 10.1007/s10714-016-2038-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a binary system composed of point particles of unequal masses in
eccentric orbits in the linear regime of the characteristic formulation of
general relativity, generalising a previous study found in the literature in
which a system of equal masses in circular orbits is considered. We also show
that the bound... | [
{
"created": "Wed, 6 Apr 2016 11:57:19 GMT",
"version": "v1"
}
] | 2016-04-07 | [
[
"M.",
"C. E. Cedeño",
""
],
[
"de Araujo",
"J. C. N.",
""
]
] | We study a binary system composed of point particles of unequal masses in eccentric orbits in the linear regime of the characteristic formulation of general relativity, generalising a previous study found in the literature in which a system of equal masses in circular orbits is considered. We also show that the boundar... |
1805.05755 | Jose Luis Bl\'azquez-Salcedo | Jose Luis Bl\'azquez-Salcedo, Daniela D. Doneva, Jutta Kunz, Stoytcho
S. Yazadjiev | Radial perturbations of the scalarized EGB black holes | 23 pages, 8 figures | Phys. Rev. D 98, 084011 (2018) | 10.1103/PhysRevD.98.084011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently a new class of scalarized black holes in Einstein-Gauss-Bonnet (EGB)
theories was discovered. What is special for these black hole solutions is that
the scalarization is not due to the presence of matter, but {it is induced} by
the curvature of spacetime itself. Moreover, more than one branch of scalarized
s... | [
{
"created": "Tue, 15 May 2018 13:34:10 GMT",
"version": "v1"
}
] | 2018-10-17 | [
[
"Blázquez-Salcedo",
"Jose Luis",
""
],
[
"Doneva",
"Daniela D.",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | Recently a new class of scalarized black holes in Einstein-Gauss-Bonnet (EGB) theories was discovered. What is special for these black hole solutions is that the scalarization is not due to the presence of matter, but {it is induced} by the curvature of spacetime itself. Moreover, more than one branch of scalarized sol... |
1102.4014 | Alexander Zhidenko | R. A. Konoplya and A. Zhidenko | Quasinormal modes of black holes: from astrophysics to string theory | 49 pages, 16 figures, to be published in Reviews of Modern Physics.
The style and reference list are slightly different from the journal version | Rev.Mod.Phys.83:793-836,2011 | 10.1103/RevModPhys.83.793 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Perturbations of black holes, initially considered in the context of possible
observations of astrophysical effects, have been studied for the past ten years
in string theory, brane-world models and quantum gravity. Through the famous
gauge/gravity duality, proper oscillations of perturbed black holes, called
quasino... | [
{
"created": "Sat, 19 Feb 2011 18:38:22 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jun 2011 11:51:40 GMT",
"version": "v2"
}
] | 2011-09-29 | [
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | Perturbations of black holes, initially considered in the context of possible observations of astrophysical effects, have been studied for the past ten years in string theory, brane-world models and quantum gravity. Through the famous gauge/gravity duality, proper oscillations of perturbed black holes, called quasinorm... |
1903.05778 | Francisco Hernandez Vivanco | Francisco Hernandez Vivanco, Rory Smith, Eric Thrane, Paul D. Lasky | Accelerated detection of the binary neutron star gravitational-wave
background | 5 pages, 4 figures | Phys. Rev. D 100, 043023 (2019) | 10.1103/PhysRevD.100.043023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Most gravitational-wave signals from binary neutron star coalescences are too
weak to be individually resolved with current detectors. We demonstrate how to
extract a population of sub-threshold binary neutron star signals using
Bayesian parameter estimation. Assuming a merger rate of one signal every two
hours, we f... | [
{
"created": "Thu, 14 Mar 2019 00:58:15 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Aug 2019 08:19:50 GMT",
"version": "v2"
}
] | 2019-08-28 | [
[
"Vivanco",
"Francisco Hernandez",
""
],
[
"Smith",
"Rory",
""
],
[
"Thrane",
"Eric",
""
],
[
"Lasky",
"Paul D.",
""
]
] | Most gravitational-wave signals from binary neutron star coalescences are too weak to be individually resolved with current detectors. We demonstrate how to extract a population of sub-threshold binary neutron star signals using Bayesian parameter estimation. Assuming a merger rate of one signal every two hours, we fin... |
gr-qc/0603049 | Valerio Bozza | V. Bozza, M. Sereno | The weakly perturbed Schwarzschild lens in the strong deflection limit | 12 pages, 1 figures | Phys.Rev. D73 (2006) 103004 | 10.1103/PhysRevD.73.103004 | null | gr-qc astro-ph | null | We investigate the strong deflection limit of gravitational lensing by a
Schwarzschild black hole embedded in an external gravitational field. The study
of this model, analogous to the Chang & Refsdal lens in the weak deflection
limit, is important to evaluate the gravitational perturbations on the
relativistic image... | [
{
"created": "Mon, 13 Mar 2006 15:22:26 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Bozza",
"V.",
""
],
[
"Sereno",
"M.",
""
]
] | We investigate the strong deflection limit of gravitational lensing by a Schwarzschild black hole embedded in an external gravitational field. The study of this model, analogous to the Chang & Refsdal lens in the weak deflection limit, is important to evaluate the gravitational perturbations on the relativistic images ... |
2010.15787 | Frans Klinkhamer | V.A. Emelyanov, F.R. Klinkhamer | Quantum scattering process and information transfer out of a black hole | 18 pages, 3 figures, v5: published version | Acta Phys. Polon. B 52, 805 (2021) | 10.5506/APhysPolB.52.805 | KA-TP-17-2020 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the probability amplitude for tree-level elastic electron-muon
scattering in Minkowski spacetime with carefully prepared initial and final
wave packets. The obtained nonzero amplitude implies a nonvanishing probability
for detecting a recoil electron outside the light-cone of the initial muon.
Transposin... | [
{
"created": "Thu, 29 Oct 2020 17:29:30 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Nov 2020 16:20:02 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Jan 2021 18:24:57 GMT",
"version": "v3"
},
{
"created": "Tue, 9 Feb 2021 13:31:14 GMT",
"version": "v4"
},
{
"cre... | 2021-07-07 | [
[
"Emelyanov",
"V. A.",
""
],
[
"Klinkhamer",
"F. R.",
""
]
] | We calculate the probability amplitude for tree-level elastic electron-muon scattering in Minkowski spacetime with carefully prepared initial and final wave packets. The obtained nonzero amplitude implies a nonvanishing probability for detecting a recoil electron outside the light-cone of the initial muon. Transposing ... |
0802.1326 | George Ruppeiner | George Ruppeiner | Thermodynamic curvature and phase transitions in Kerr-Newman black holes | 29 pages, 8 figures | Phys.Rev.D78:024016,2008 | 10.1103/PhysRevD.78.024016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Singularities in the thermodynamics of Kerr-Newman black holes are commonly
associated with phase transitions. However, such interpretations are
complicated by a lack of stability and, more significantly, by a lack of
conclusive insight from microscopic models. Here, I focus on the later problem.
I use the thermodyna... | [
{
"created": "Sun, 10 Feb 2008 15:28:50 GMT",
"version": "v1"
},
{
"created": "Wed, 14 May 2008 23:56:49 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Jul 2008 00:44:37 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Ruppeiner",
"George",
""
]
] | Singularities in the thermodynamics of Kerr-Newman black holes are commonly associated with phase transitions. However, such interpretations are complicated by a lack of stability and, more significantly, by a lack of conclusive insight from microscopic models. Here, I focus on the later problem. I use the thermodynami... |
gr-qc/0310114 | Vladimir Ivashchuk | V. D. Ivashchuk | On exact solutions in multidimensional gravity with antisymmetric forms | 22 pages, Latex, to be published in Proc. of E. Majorana School on
Gravitation and Cosmology (30 April - 10 May 2003, Erice) | null | 10.1007/978-1-4020-2242-5_10 | IGC-PFUR-10/2003 | gr-qc astro-ph hep-th | null | This short review deals with a multidimensional gravitational model
containing dilatonic scalar fields and antisymmetric forms. The manifold is
chosen in the product form. The sigma-model approach and exact solutions are
reviewed.
| [
{
"created": "Mon, 27 Oct 2003 11:18:01 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Ivashchuk",
"V. D.",
""
]
] | This short review deals with a multidimensional gravitational model containing dilatonic scalar fields and antisymmetric forms. The manifold is chosen in the product form. The sigma-model approach and exact solutions are reviewed. |
gr-qc/0403062 | Alexander Kamenshchik | V. Gorini, A. Kamenshchik, U. Moschella, V. Pasquier | The Chaplygin gas as a model for dark energy | Some misprints are corrected | null | 10.1142/9789812704030_0050 | null | gr-qc astro-ph hep-th | null | We review the essential features of the Chaplygin gas cosmological models and
provide some examples of appearance of the Chaplygin gas equation of state in
modern physics. A possible theoretical basis for the Chaplygin gas in cosmology
is discussed. The relation with scalar field and tachyon cosmological models is
al... | [
{
"created": "Mon, 15 Mar 2004 13:05:02 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Apr 2004 10:46:16 GMT",
"version": "v2"
}
] | 2016-11-09 | [
[
"Gorini",
"V.",
""
],
[
"Kamenshchik",
"A.",
""
],
[
"Moschella",
"U.",
""
],
[
"Pasquier",
"V.",
""
]
] | We review the essential features of the Chaplygin gas cosmological models and provide some examples of appearance of the Chaplygin gas equation of state in modern physics. A possible theoretical basis for the Chaplygin gas in cosmology is discussed. The relation with scalar field and tachyon cosmological models is also... |
2306.12709 | Yan-Gang Miao | Yang Guo, Hao Xie, Yan-Gang Miao | Recovery of consistency in thermodynamics of regular black holes in
Einstein's gravity coupled with nonlinear electrodynamics | v1: 18 pages, 7 figures; v2: 20 pages, clarifications and references
added, final version to appear in Nuclear Physics B | Nucl. Phys. B 1000 (2024) 116491 (14 pages) | 10.1016/j.nuclphysb.2024.116491 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As one of candidate theories in the construction of regular black holes,
Einstein's gravity coupled with nonlinear electrodynamics has been a topic of
great concerns. Owing to the coupling between Einstein's gravity and nonlinear
electromagnetic fields, we need to reconsider the first law of thermodynamics,
which wil... | [
{
"created": "Thu, 22 Jun 2023 07:42:26 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Feb 2024 06:45:47 GMT",
"version": "v2"
}
] | 2024-03-05 | [
[
"Guo",
"Yang",
""
],
[
"Xie",
"Hao",
""
],
[
"Miao",
"Yan-Gang",
""
]
] | As one of candidate theories in the construction of regular black holes, Einstein's gravity coupled with nonlinear electrodynamics has been a topic of great concerns. Owing to the coupling between Einstein's gravity and nonlinear electromagnetic fields, we need to reconsider the first law of thermodynamics, which will ... |
1811.05208 | Philipp Fleig | Philipp Fleig and Vladimir A. Belinski | BKL oscillations in 2+1 space-time dimensions | 22 pages, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the question whether there are cosmological models in 2+1
space-time dimensions which exhibit dynamics similar to BKL oscillations, as
the cosmological singularity is approached. Based on intuition, we conceive a
toy model which displays such oscillatory dynamics. We show that in the phase
space of thi... | [
{
"created": "Tue, 13 Nov 2018 10:56:07 GMT",
"version": "v1"
}
] | 2018-11-14 | [
[
"Fleig",
"Philipp",
""
],
[
"Belinski",
"Vladimir A.",
""
]
] | We investigate the question whether there are cosmological models in 2+1 space-time dimensions which exhibit dynamics similar to BKL oscillations, as the cosmological singularity is approached. Based on intuition, we conceive a toy model which displays such oscillatory dynamics. We show that in the phase space of this ... |
1207.6955 | Ivan Booth | Ivan Booth | Spacetime near isolated and dynamical trapping horizons | 29 pages, 3 figures; Version 2: Numerous changes made to emphasize
differences between the isolated and dynamical cases, typos also corrected;
Version 3: Several important typos corrected in equations (this supersedes
the PRD version) | Phys.Rev. D87 (2013) 024008 | 10.1103/PhysRevD.87.024008 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the near-horizon spacetime for isolated and dynamical trapping
horizons (equivalently marginally outer trapped tubes). The metric is expanded
relative to an ingoing Gaussian null coordinate and the terms of that expansion
are explicitly calculated to second order. For the spacelike case, knowledge of
the int... | [
{
"created": "Mon, 30 Jul 2012 15:04:44 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Nov 2012 15:23:00 GMT",
"version": "v2"
},
{
"created": "Mon, 2 Jun 2014 14:06:39 GMT",
"version": "v3"
}
] | 2014-06-03 | [
[
"Booth",
"Ivan",
""
]
] | We study the near-horizon spacetime for isolated and dynamical trapping horizons (equivalently marginally outer trapped tubes). The metric is expanded relative to an ingoing Gaussian null coordinate and the terms of that expansion are explicitly calculated to second order. For the spacelike case, knowledge of the intri... |
1802.10043 | Volker Perlick | Claus L\"ammerzahl and Volker Perlick | Finsler geometry as a model for relativistic gravity | 16 pages, submitted to the proceedings volume of the conference
`Geometric Foundations of Gravity' in Tartu 2017 | Int. J. Geom. Meth. Mod. Phys. 15, 1850166 (2018) | 10.1142/S0219887818501669 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give an overview on the status and on the perspectives of Finsler gravity,
beginning with a discussion of various motivations for considering a Finslerian
modification of General Relativity. The subjects covered include Finslerian
versions of Maxwell's equations, of the Klein-Gordon equation and of the Dirac
equat... | [
{
"created": "Tue, 27 Feb 2018 17:44:46 GMT",
"version": "v1"
}
] | 2018-12-05 | [
[
"Lämmerzahl",
"Claus",
""
],
[
"Perlick",
"Volker",
""
]
] | We give an overview on the status and on the perspectives of Finsler gravity, beginning with a discussion of various motivations for considering a Finslerian modification of General Relativity. The subjects covered include Finslerian versions of Maxwell's equations, of the Klein-Gordon equation and of the Dirac equatio... |
1112.1539 | Alexander Zhuk | Maxim Eingorn and Alexander Zhuk | Asymptotic latent solitons, black strings and black branes in
f(R)-gravity | RevTex4 5 pages, no figures | Phys.Rev.D85:064030,2012 | 10.1103/PhysRevD.85.064030 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate nonlinear f(R) theories in the Kaluza-Klein models with
toroidal compactification of extra dimensions. A point-like matter source has
the dust-like equation of state in our three dimensions and nonzero equations
of state in the extra dimensions. We obtain solutions of linearized Einstein
equations with... | [
{
"created": "Wed, 7 Dec 2011 12:10:22 GMT",
"version": "v1"
}
] | 2013-05-30 | [
[
"Eingorn",
"Maxim",
""
],
[
"Zhuk",
"Alexander",
""
]
] | We investigate nonlinear f(R) theories in the Kaluza-Klein models with toroidal compactification of extra dimensions. A point-like matter source has the dust-like equation of state in our three dimensions and nonzero equations of state in the extra dimensions. We obtain solutions of linearized Einstein equations with t... |
2011.06541 | Joshua Erlich | Austin J. Batz, Joshua Erlich and Luke Mrini | Background-Independent Composite Gravity | 22 pages, 2 figures | null | 10.1088/1361-6382/abefbd | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We explore a background-independent theory of composite gravity. The vacuum
expectation value of the composite metric satisfies Einstein's equations (with
corrections) as a consistency condition, and selects the vacuum spacetime. A
gravitational interaction then emerges in vacuum correlation functions. The
action rem... | [
{
"created": "Thu, 12 Nov 2020 17:58:56 GMT",
"version": "v1"
}
] | 2021-06-09 | [
[
"Batz",
"Austin J.",
""
],
[
"Erlich",
"Joshua",
""
],
[
"Mrini",
"Luke",
""
]
] | We explore a background-independent theory of composite gravity. The vacuum expectation value of the composite metric satisfies Einstein's equations (with corrections) as a consistency condition, and selects the vacuum spacetime. A gravitational interaction then emerges in vacuum correlation functions. The action remai... |
gr-qc/0307040 | Sebastiano Sonego | Sebastiano Sonego and Hans Westman | Particle detectors, geodesic motion, and the equivalence principle | 14 pages. Revised version, with corrections; added two references.
Accepted for publication in Class. Quantum Grav | Class.Quant.Grav.21:433-444,2004 | 10.1088/0264-9381/21/2/008 | null | gr-qc | null | It is shown that quantum particle detectors are not reliable probes of
spacetime structure. In particular, they fail to distinguish between inertial
and non-inertial motion in a general spacetime. To prove this, we consider
detectors undergoing circular motion in an arbitrary static spherically
symmetric spacetime, a... | [
{
"created": "Wed, 9 Jul 2003 13:41:39 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Nov 2003 11:02:51 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Sonego",
"Sebastiano",
""
],
[
"Westman",
"Hans",
""
]
] | It is shown that quantum particle detectors are not reliable probes of spacetime structure. In particular, they fail to distinguish between inertial and non-inertial motion in a general spacetime. To prove this, we consider detectors undergoing circular motion in an arbitrary static spherically symmetric spacetime, and... |
0707.4010 | Maximiliano Ujevic | Maximiliano Ujevic, Patricio S. Letelier | Stability of general relativistic Miyamoto-Nagai galaxies | 11 pages, 5 figures, accepted for publication in MNRAS | MNRAS 381, 1499-1507 (2007) | 10.1111/j.1365-2966.2007.12242.x | null | gr-qc astro-ph | null | The stability of a recently proposed general relativistic model of galaxies
is studied in some detail. This model is a general relativistic version of the
well known Miyamoto-Nagai model that represents well a thick galactic disk. The
stability of the disk is investigated under a general first order perturbation
keep... | [
{
"created": "Thu, 26 Jul 2007 20:39:51 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Ujevic",
"Maximiliano",
""
],
[
"Letelier",
"Patricio S.",
""
]
] | The stability of a recently proposed general relativistic model of galaxies is studied in some detail. This model is a general relativistic version of the well known Miyamoto-Nagai model that represents well a thick galactic disk. The stability of the disk is investigated under a general first order perturbation keepin... |
1904.10791 | Jackson Levi Said | Sebastian Bahamonde, Konstantinos F. Dialektopoulos, Jackson Levi Said | Can Horndeski Theory be recast using Teleparallel Gravity? | 18 pages, 1 figure | Phys. Rev. D 100, 064018 (2019) | 10.1103/PhysRevD.100.064018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Horndeski gravity is the most general scalar tensor theory, with a single
scalar field, leading to second order field equations and after the GW170817 it
has been severely constrained. In this paper, we study the analogue of
Horndeski's theory in the teleparallel gravity framework were gravity is
mediated through tor... | [
{
"created": "Tue, 23 Apr 2019 11:35:50 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Sep 2019 14:05:08 GMT",
"version": "v2"
}
] | 2019-09-12 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Dialektopoulos",
"Konstantinos F.",
""
],
[
"Said",
"Jackson Levi",
""
]
] | Horndeski gravity is the most general scalar tensor theory, with a single scalar field, leading to second order field equations and after the GW170817 it has been severely constrained. In this paper, we study the analogue of Horndeski's theory in the teleparallel gravity framework were gravity is mediated through torsi... |
gr-qc/0703010 | Dah-Wei Chiou | Dah-Wei Chiou | Effective Dynamics for the Cosmological Bounces in Bianchi Type I Loop
Quantum Cosmology | 7 pages, 4 figures; typos corrected, one reference added | null | null | IGPG-07/2-5 | gr-qc | null | The detailed formulation for loop quantum cosmology (LQC) in the Bianchi I
model with a massless scalar field was recently constructed. In this paper, its
effective dynamics with the LQC discreteness corrections is studied and the
equations of motion are analytically solved, showing that the big bang
singularity is r... | [
{
"created": "Fri, 2 Mar 2007 20:24:07 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Sep 2007 20:55:50 GMT",
"version": "v2"
}
] | 2007-09-12 | [
[
"Chiou",
"Dah-Wei",
""
]
] | The detailed formulation for loop quantum cosmology (LQC) in the Bianchi I model with a massless scalar field was recently constructed. In this paper, its effective dynamics with the LQC discreteness corrections is studied and the equations of motion are analytically solved, showing that the big bang singularity is rep... |
2302.13349 | Federico Agustin Membiela | Ariel M\'egevand, Federico Agust\'in Membiela | Thin and thick bubble walls I: vacuum phase transitions | 46 pages, 18 figures. v2: include new comments and clarify some
ideas. Figures and references added | JCAP06(2023)007 | 10.1088/1475-7516/2023/06/007 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is the first in a series of papers where we study the dynamics of a
bubble wall beyond usual approximations, such as the assumptions of spherical
bubbles and infinitely thin walls. In this paper, we consider a vacuum phase
transition. Thus, we describe a bubble as a configuration of a scalar field
whose equation... | [
{
"created": "Sun, 26 Feb 2023 16:49:39 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jun 2023 13:35:44 GMT",
"version": "v2"
}
] | 2023-06-28 | [
[
"Mégevand",
"Ariel",
""
],
[
"Membiela",
"Federico Agustín",
""
]
] | This is the first in a series of papers where we study the dynamics of a bubble wall beyond usual approximations, such as the assumptions of spherical bubbles and infinitely thin walls. In this paper, we consider a vacuum phase transition. Thus, we describe a bubble as a configuration of a scalar field whose equation o... |
gr-qc/9705072 | Renaud Parentani | R. Brout and R. Parentani | Time in Cosmology | 21 pages, clarified and abbreviated version, to appear in IJMPD | Int.J.Mod.Phys. D8 (1999) 1-22 | 10.1142/S0218271899000031 | null | gr-qc | null | The notion of time in cosmology is revealed through an examination of
transition matrix elements of radiative processes occurring in the cosmos. To
begin with, the very concept of time is delineated in classical physics in
terms of correlations between the succession of configurations which describe a
process and a s... | [
{
"created": "Tue, 27 May 1997 08:59:19 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Feb 1999 11:28:30 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Brout",
"R.",
""
],
[
"Parentani",
"R.",
""
]
] | The notion of time in cosmology is revealed through an examination of transition matrix elements of radiative processes occurring in the cosmos. To begin with, the very concept of time is delineated in classical physics in terms of correlations between the succession of configurations which describe a process and a sta... |
1709.06016 | Justin Vines | Justin Vines | Scattering of two spinning black holes in post-Minkowskian gravity, to
all orders in spin, and effective-one-body mappings | 26 pages, 2 figures. v2: added references; corrected typos in
Appendix A; added missing link in Eq. (B11) | null | 10.1088/1361-6382/aaa3a8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate equivalences, under simple mappings, between the dynamics of
three distinct systems---(i) an arbitrary-mass-ratio two-spinning-black-hole
system, (ii) a spinning test black hole in a background Kerr spacetime, and
(iii) geodesic motion in Kerr---when each is considered in the first
post-Minkowskian (1P... | [
{
"created": "Mon, 18 Sep 2017 15:54:42 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Sep 2017 15:03:25 GMT",
"version": "v2"
}
] | 2018-03-28 | [
[
"Vines",
"Justin",
""
]
] | We demonstrate equivalences, under simple mappings, between the dynamics of three distinct systems---(i) an arbitrary-mass-ratio two-spinning-black-hole system, (ii) a spinning test black hole in a background Kerr spacetime, and (iii) geodesic motion in Kerr---when each is considered in the first post-Minkowskian (1PM)... |
gr-qc/9709028 | Dr John W. Barrett | John W. Barrett, Louis Crane | Relativistic spin networks and quantum gravity | 10 pages, amstex, some errors corrected, more references | J.Math.Phys. 39 (1998) 3296-3302 | 10.1063/1.532254 | null | gr-qc hep-th | null | Relativistic spin networks are defined by considering the spin covering of
the group SO(4), SU(2) times SU(2). Relativistic quantum spins are related to
the geometry of the 2-dimensional faces of a 4-simplex. This extends the idea
of Ponzano and Regge that SU(2) spins are related to the geometry of the edges
of a 3-s... | [
{
"created": "Fri, 12 Sep 1997 13:51:05 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Jan 1998 17:11:26 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Barrett",
"John W.",
""
],
[
"Crane",
"Louis",
""
]
] | Relativistic spin networks are defined by considering the spin covering of the group SO(4), SU(2) times SU(2). Relativistic quantum spins are related to the geometry of the 2-dimensional faces of a 4-simplex. This extends the idea of Ponzano and Regge that SU(2) spins are related to the geometry of the edges of a 3-sim... |
2309.10123 | Dejan Stojkovic | Ali Fawzi and Dejan Stojkovic | On the generalization of the Kruskal-Szekeres coordinates: a global
conformal charting of the Reissner-Nordstrom spacetime | Penrose diagrams added | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The Kruskal-Szekeres coordinates construction for the Schwarzschild spacetime
could be viewed geometrically as a squeezing of the $t$-line associated with
the asymptotic observer into a single point, at the event horizon $r=2M$.
Starting from this point, we extend the Kruskal charting to spacetimes with two
horizons,... | [
{
"created": "Mon, 18 Sep 2023 19:56:43 GMT",
"version": "v1"
},
{
"created": "Sun, 31 Dec 2023 20:23:28 GMT",
"version": "v2"
}
] | 2024-01-02 | [
[
"Fawzi",
"Ali",
""
],
[
"Stojkovic",
"Dejan",
""
]
] | The Kruskal-Szekeres coordinates construction for the Schwarzschild spacetime could be viewed geometrically as a squeezing of the $t$-line associated with the asymptotic observer into a single point, at the event horizon $r=2M$. Starting from this point, we extend the Kruskal charting to spacetimes with two horizons, i... |
1605.03424 | Francesco Maione | Francesco Maione, Roberto De Pietri, Alessandra Feo, Frank L\"offler | Binary neutron star merger simulations with different initial orbital
frequency and equation of state | 32 pages, 13 figures | Class. Quantum Grav. 33 (2016) 175009 | 10.1088/0264-9381/33/17/175009 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present results from three-dimensional general relativistic simulations of
binary neutron star coalescences and mergers using public codes. We considered
equal mass models where the baryon mass of the two Neutron Stars (NS) is
$1.4M_{\odot}$, described by four different equations of state (EOS) for the
cold nuclea... | [
{
"created": "Wed, 11 May 2016 13:10:08 GMT",
"version": "v1"
}
] | 2016-08-09 | [
[
"Maione",
"Francesco",
""
],
[
"De Pietri",
"Roberto",
""
],
[
"Feo",
"Alessandra",
""
],
[
"Löffler",
"Frank",
""
]
] | We present results from three-dimensional general relativistic simulations of binary neutron star coalescences and mergers using public codes. We considered equal mass models where the baryon mass of the two Neutron Stars (NS) is $1.4M_{\odot}$, described by four different equations of state (EOS) for the cold nuclear ... |
1810.04436 | Taotao Qiu | Taotao Qiu, Kun Tian, Shaojun Bu | Perturbations of bounce inflation scenario from $f(T)$ modified gravity
revisited | 5 pages, 1 figures. Comments are welcome | null | 10.1140/epjc/s10052-019-6782-8 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we revisit the perturbations that are generated in the bounce
inflation scenario constructed within the framework of $f(T)$ theory. It has
been well known that pure $f(T)$ theory cannot give rise to bounce inflation
behavior, so aside from the gravity part, we also employ a canonical scalar
field for mi... | [
{
"created": "Wed, 10 Oct 2018 09:44:05 GMT",
"version": "v1"
}
] | 2019-05-01 | [
[
"Qiu",
"Taotao",
""
],
[
"Tian",
"Kun",
""
],
[
"Bu",
"Shaojun",
""
]
] | In this work, we revisit the perturbations that are generated in the bounce inflation scenario constructed within the framework of $f(T)$ theory. It has been well known that pure $f(T)$ theory cannot give rise to bounce inflation behavior, so aside from the gravity part, we also employ a canonical scalar field for mini... |
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