id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0510061 | Remo Garattini | Remo Garattini | The Cosmological Constant as an Eigenvalue of a Sturm-Liouville Problem
and its Renormalization | 8 pages, Talk given at "QFEXT'05", the 7-th workshop on quantum field
theory under the influence of external conditions, Barcelona, Spain, Sept.
5-9, 2005 | J.Phys. A39 (2006) 6393-6400 | 10.1088/0305-4470/39/21/S33 | null | gr-qc astro-ph hep-th | null | We discuss the case of massive gravitons and their relation with the
cosmological constant, considered as an eigenvalue of a Sturm-Liouville
problem. A variational approach with Gaussian trial wave functionals is used as
a method to study such a problem. We approximate the equation to one loop in a
Schwarzschild back... | [
{
"created": "Thu, 13 Oct 2005 10:38:42 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Garattini",
"Remo",
""
]
] | We discuss the case of massive gravitons and their relation with the cosmological constant, considered as an eigenvalue of a Sturm-Liouville problem. A variational approach with Gaussian trial wave functionals is used as a method to study such a problem. We approximate the equation to one loop in a Schwarzschild backgr... |
1406.6798 | Ken-Ichi Nakao | Ken-ichi Nakao, Masashi Kimura, Tomohiro Harada, Mandar Patil, Pankaj
S. Joshi | How small can an over-spinning body be in general relativity? | 30 pages, 8 figures, the version published in PRD | Phys. Rev. D 90, 124079 (2014) | 10.1103/PhysRevD.90.124079 | OCU-PHYS-402, AP-GR-110, RUP-14-10 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The angular momentum of the Kerr singularity should not be larger than a
threshold value so that it is enclosed by an event horizon: The Kerr
singularity with the angular momentum exceeding the threshold value is naked.
This fact suggests that if the cosmic censorship exists in our Universe, an
over-spinning body wit... | [
{
"created": "Thu, 26 Jun 2014 08:06:41 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Dec 2014 02:18:33 GMT",
"version": "v2"
}
] | 2015-01-07 | [
[
"Nakao",
"Ken-ichi",
""
],
[
"Kimura",
"Masashi",
""
],
[
"Harada",
"Tomohiro",
""
],
[
"Patil",
"Mandar",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | The angular momentum of the Kerr singularity should not be larger than a threshold value so that it is enclosed by an event horizon: The Kerr singularity with the angular momentum exceeding the threshold value is naked. This fact suggests that if the cosmic censorship exists in our Universe, an over-spinning body witho... |
gr-qc/9904030 | Yakov Itin | Yakov Itin | On variations in teleparallelism theories | null | null | null | null | gr-qc | null | The variation procedure on a teleparallel manifold is studied. The main
problem is the non-commutativity of the variation with the Hodge dual map. We
establish certain useful formulas for variations and restate the master formula
due to Hehl and his collaborates. Our approach is different and sometimes
easier for app... | [
{
"created": "Tue, 13 Apr 1999 15:48:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Itin",
"Yakov",
""
]
] | The variation procedure on a teleparallel manifold is studied. The main problem is the non-commutativity of the variation with the Hodge dual map. We establish certain useful formulas for variations and restate the master formula due to Hehl and his collaborates. Our approach is different and sometimes easier for appli... |
gr-qc/9907055 | Michele Maggiore | Michele Maggiore and Alberto Nicolis | Detection strategies for scalar gravitational waves with interferometers
and resonant spheres | 26 pages, Latex, 4 Postscript figures. Various minor improvements,
misprint in eqs. 42, 127, 138 corrected, references added | Phys.Rev. D62 (2000) 024004 | 10.1103/PhysRevD.62.024004 | IFUP-TH 40/99 | gr-qc | null | We compute the response and the angular pattern function of an interferometer
for a scalar component of gravitational radiation in Brans-Dicke theory. We
examine the problem of detecting a stochastic background of scalar GWs and
compute the scalar overlap reduction function in the correlation between an
interferomete... | [
{
"created": "Fri, 16 Jul 1999 15:07:06 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Feb 2000 17:10:52 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Maggiore",
"Michele",
""
],
[
"Nicolis",
"Alberto",
""
]
] | We compute the response and the angular pattern function of an interferometer for a scalar component of gravitational radiation in Brans-Dicke theory. We examine the problem of detecting a stochastic background of scalar GWs and compute the scalar overlap reduction function in the correlation between an interferometer ... |
1211.3795 | Muhammad Sharif | Muhammad Sharif and Saira Waheed | Cosmic Evolution in Self-Interacting Brans-Dicke Cosmology | 23 pages, 6 figures | J. Phys. Soc. Jpn. 81(2012)114901 | 10.1143/JPSJ.81.114901 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the nature of self-interacting potential that
can support the accelerated expansion of the universe as indicated by
observational data. For this purpose, we consider the Bianchi type I (BI)
universe model in the Brans-Dicke (BD) field scenario and use a power law for
both the scalar fiel... | [
{
"created": "Fri, 16 Nov 2012 04:39:38 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Sharif",
"Muhammad",
""
],
[
"Waheed",
"Saira",
""
]
] | In this paper, we investigate the nature of self-interacting potential that can support the accelerated expansion of the universe as indicated by observational data. For this purpose, we consider the Bianchi type I (BI) universe model in the Brans-Dicke (BD) field scenario and use a power law for both the scalar field ... |
1010.6230 | Antonio Candido de Siqueira V. V. | A. C. V. V. de Siqueira | Mapping and Embedding of Two Metrics Associated with Dark Matter, Dark
Energy, and Ordinary Matter | 25 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we build a mapping between two different metrics and embed them
in a flat manifold. One of the metrics represents the ordinary matter, and the
other describes the dark matter, the dark energy, and the particle-antiparticle
asymmetry. The latter was obtained in a recent paper. For the mapping and
embeddi... | [
{
"created": "Fri, 29 Oct 2010 14:43:43 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"de Siqueira",
"A. C. V. V.",
""
]
] | In this paper we build a mapping between two different metrics and embed them in a flat manifold. One of the metrics represents the ordinary matter, and the other describes the dark matter, the dark energy, and the particle-antiparticle asymmetry. The latter was obtained in a recent paper. For the mapping and embedding... |
gr-qc/0411047 | Parvin Moyassari | H. Salehi, P. Moyassari, R. Rashidi | A classical cosmological model for triviality | 6 pages,no figures | Int.J.Theor.Phys. 45 (2006) 1757-1763 | null | null | gr-qc | null | The aim of this paper is to study the triviality of $\lambda\phi^{4}$ theory
in a classical gravitational model. Starting from a conformal invariant scalar
tensor theory with a self-interaction term $\lambda\phi^{4}$, we investigate
the effect of a conformal symmetry breaking emerging from the gravitational
coupling ... | [
{
"created": "Tue, 9 Nov 2004 14:05:08 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Salehi",
"H.",
""
],
[
"Moyassari",
"P.",
""
],
[
"Rashidi",
"R.",
""
]
] | The aim of this paper is to study the triviality of $\lambda\phi^{4}$ theory in a classical gravitational model. Starting from a conformal invariant scalar tensor theory with a self-interaction term $\lambda\phi^{4}$, we investigate the effect of a conformal symmetry breaking emerging from the gravitational coupling of... |
2206.00139 | Emil Mottola | Emil Mottola | Beyond Einstein's Horizon: Gravitational Condensates and Black Hole
Interiors in the Effective Theory of Gravity | This white paper submitted to the TF01 category is intended as a
sketch of the main ideas of the EFT of gravity addressed also to the broader
Snowmass community. The technical details of this EFT are given in
arXiv:2205.04703 submitted for publication | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | Two of the most fundamental problems at the nexus of Einstein's classical
General Relativity (GR) and Quantum Field Theory (QFT) are: (1) complete
gravitational collapse, presumed in classical GR to lead to a Black Hole (BH)
horizon and interior singularity, which generate a number of paradoxes for
quantum theory; an... | [
{
"created": "Tue, 31 May 2022 22:49:17 GMT",
"version": "v1"
}
] | 2022-06-02 | [
[
"Mottola",
"Emil",
""
]
] | Two of the most fundamental problems at the nexus of Einstein's classical General Relativity (GR) and Quantum Field Theory (QFT) are: (1) complete gravitational collapse, presumed in classical GR to lead to a Black Hole (BH) horizon and interior singularity, which generate a number of paradoxes for quantum theory; and ... |
gr-qc/0211049 | Vladimir Ivashchuk | H. Dehnen, V. D. Ivashchuk and V. N. Melnikov | On black hole solutions in model with anisotropic fluid | 16 pages, Latex, no figures, submit. to Class. Quantum Grav | Grav.Cosmol. 9 (2003) 153-158 | null | IGC-PFUR-04/2002 | gr-qc hep-th | null | A family of spherically symmetric solutions in the model with 1-component
anisotropic fluid is considered. The metric of the solution depends on a
parameter q > 0 relating radial pressure and the density and contains n -1
parameters corresponding to Ricci-flat ``internal space'' metrics. For q = 1
and certain equatio... | [
{
"created": "Wed, 13 Nov 2002 09:48:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dehnen",
"H.",
""
],
[
"Ivashchuk",
"V. D.",
""
],
[
"Melnikov",
"V. N.",
""
]
] | A family of spherically symmetric solutions in the model with 1-component anisotropic fluid is considered. The metric of the solution depends on a parameter q > 0 relating radial pressure and the density and contains n -1 parameters corresponding to Ricci-flat ``internal space'' metrics. For q = 1 and certain equations... |
2008.01878 | Eleni-Alexandra Kontou | Eleni-Alexandra Kontou and Ken D. Olum | Energy conditions allow eternal inflation | 24 pages, 9 figures | null | 10.1088/1475-7516/2021/03/097 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Eternal inflation requires upward fluctuations of the energy in a Hubble
volume, which appear to violate the energy conditions. In particular, a scalar
field in an inflating spacetime should obey the averaged null energy condition,
which seems to rule out eternal inflation. Here we show how eternal inflation
is possi... | [
{
"created": "Tue, 4 Aug 2020 23:30:39 GMT",
"version": "v1"
}
] | 2021-04-14 | [
[
"Kontou",
"Eleni-Alexandra",
""
],
[
"Olum",
"Ken D.",
""
]
] | Eternal inflation requires upward fluctuations of the energy in a Hubble volume, which appear to violate the energy conditions. In particular, a scalar field in an inflating spacetime should obey the averaged null energy condition, which seems to rule out eternal inflation. Here we show how eternal inflation is possibl... |
gr-qc/9705048 | Andrew Liddle | John D Barrow and Andrew R Liddle | Can Inflation be Falsified? | 7 pages LaTeX file with two figures incorporated by epsf. Fifth Prize
in Gravity Research Foundation Essay Competition. To appear, General
Relativity and Gravitation | Gen.Rel.Grav. 29 (1997) 1503-1510 | 10.1023/A:1018826228212 | SUSSEX-AST 97/3-1 | gr-qc astro-ph | null | Despite its central role in modern cosmology, doubts are often expressed as
to whether cosmological inflation is really a falsifiable theory. We
distinguish two facets of inflation, one as a theory of initial conditions for
the hot big bang and the other as a model for the origin of structure in the
Universe. We argu... | [
{
"created": "Mon, 19 May 1997 14:56:35 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Barrow",
"John D",
""
],
[
"Liddle",
"Andrew R",
""
]
] | Despite its central role in modern cosmology, doubts are often expressed as to whether cosmological inflation is really a falsifiable theory. We distinguish two facets of inflation, one as a theory of initial conditions for the hot big bang and the other as a model for the origin of structure in the Universe. We argue ... |
1306.6204 | Tim-Torben Paetz | Tim-Torben Paetz | Conformally covariant systems of wave equations and their equivalence to
Einstein's field equations | 69 pages, a couple of minor changes, summary added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive, in 3+1 spacetime dimensions, two alternative systems of
quasi-linear wave equations, based on Friedrich's conformal field equations. We
analyse their equivalence to Einstein's vacuum field equations when appropriate
constraint equations are satisfied by the initial data. As an application, the
characterist... | [
{
"created": "Wed, 26 Jun 2013 11:19:35 GMT",
"version": "v1"
},
{
"created": "Thu, 22 May 2014 15:15:53 GMT",
"version": "v2"
}
] | 2014-05-23 | [
[
"Paetz",
"Tim-Torben",
""
]
] | We derive, in 3+1 spacetime dimensions, two alternative systems of quasi-linear wave equations, based on Friedrich's conformal field equations. We analyse their equivalence to Einstein's vacuum field equations when appropriate constraint equations are satisfied by the initial data. As an application, the characteristic... |
gr-qc/0509031 | Etienne Takou | Norbert Noutchegueme and David Dongo | Global Existence of Solutions for the Einstein-Boltzmann System in a
Bianchi Type I Space-Time | 44 pages, detailed version of paper | Class.Quant.Grav.23:2979-3004,2006 | 10.1088/0264-9381/23/9/013 | null | gr-qc | null | We prove a global in time existence theorem, for the initial value problem
for the Einstein-Boltzmann system, with arbitrarily large initial data, in the
homogeneous case, in a Bianchi type I space-time
| [
{
"created": "Fri, 9 Sep 2005 08:13:00 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Noutchegueme",
"Norbert",
""
],
[
"Dongo",
"David",
""
]
] | We prove a global in time existence theorem, for the initial value problem for the Einstein-Boltzmann system, with arbitrarily large initial data, in the homogeneous case, in a Bianchi type I space-time |
gr-qc/0602118 | R. M. Kiehn | R. M. Kiehn | A topological theory of the Physical Vacuum | 59 pages 8 figures fixed firstname, lastname in references two typos
color first picture | null | null | null | gr-qc | null | This article examines how the physical presence of field energy and
particulate matter could influence the topological properties of space time.
The theory is developed in terms of vector and matrix equations of exterior
differential forms. The topological features and the dynamics of such exterior
differential syste... | [
{
"created": "Tue, 28 Feb 2006 15:44:24 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Mar 2006 13:20:35 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kiehn",
"R. M.",
""
]
] | This article examines how the physical presence of field energy and particulate matter could influence the topological properties of space time. The theory is developed in terms of vector and matrix equations of exterior differential forms. The topological features and the dynamics of such exterior differential systems... |
1806.07431 | Nicholas Loutrel | Nicholas Loutrel, Takahiro Tanaka, and Nicolas Yunes | Spin-Precessing Black Hole Binaries in Dynamical Chern-Simons Gravity | 23 pages, 1 figure. Updated to reflect the published version | Phys. Rev. D 98, 064020 (2018) | 10.1103/PhysRevD.98.064020 | KUNS-2729, YITP-18-61 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves from spin-precessing binaries exhibit amplitude
oscillations that provide an invaluable method to extract the spins of the
inspiraling compact objects. The spin-spin and spin-orbit interactions that
cause this effect are sensitive to the fundamental nature of gravity, which
will allow us to constr... | [
{
"created": "Tue, 19 Jun 2018 19:13:09 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Oct 2018 12:55:02 GMT",
"version": "v2"
}
] | 2018-10-03 | [
[
"Loutrel",
"Nicholas",
""
],
[
"Tanaka",
"Takahiro",
""
],
[
"Yunes",
"Nicolas",
""
]
] | Gravitational waves from spin-precessing binaries exhibit amplitude oscillations that provide an invaluable method to extract the spins of the inspiraling compact objects. The spin-spin and spin-orbit interactions that cause this effect are sensitive to the fundamental nature of gravity, which will allow us to constrai... |
1105.3331 | Hirotada Okawa | Hirotada Okawa, Ken-ichi Nakao and Masaru Shibata | Is super-Planckian physics visible? -- Scattering of black holes in 5
dimensions | 11 pages, 6 figures | Phys.Rev.D83:121501,2011 | 10.1103/PhysRevD.83.121501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It may be widely believed that probing short-distance physics is limited by
the presence of the Planck energy scale above which scale any information is
cloaked behind a horizon. If this hypothesis is correct, we could observe
quantum behavior of gravity only through a black hole of Planck mass. We
numerically show t... | [
{
"created": "Tue, 17 May 2011 10:24:28 GMT",
"version": "v1"
}
] | 2011-06-13 | [
[
"Okawa",
"Hirotada",
""
],
[
"Nakao",
"Ken-ichi",
""
],
[
"Shibata",
"Masaru",
""
]
] | It may be widely believed that probing short-distance physics is limited by the presence of the Planck energy scale above which scale any information is cloaked behind a horizon. If this hypothesis is correct, we could observe quantum behavior of gravity only through a black hole of Planck mass. We numerically show tha... |
1306.5966 | Domenico Giulini J.W. | Domenico Giulini | Einstein's "Prague field-equation" -- another perspective | 14 pages, no figures. Based on a talk delivered at the conference
"Relativity and Gravitation 100 years after Einstein in Prague", held in
Prague 25.-29. June 2012 | In: J. Bicak and T. Ledvinka (editors), Relativity and Gravitation
- 100 Years after Einstein in Prague, pp. 69-82, vol. 157 of series
"Fundamental Theories of Physics", Springer Verlag, Dordrecht, 2014 | null | null | gr-qc physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I reconsider Einstein's 1912 "Prague-Theory" of static gravity based on a
scalar field obeying a non-linear field equation. I point out that this
equation follows from the self-consistent implementation of the principle that
all energies source the gravitational field according to E=m(c-squared). This
makes it an int... | [
{
"created": "Tue, 25 Jun 2013 13:53:03 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Giulini",
"Domenico",
""
]
] | I reconsider Einstein's 1912 "Prague-Theory" of static gravity based on a scalar field obeying a non-linear field equation. I point out that this equation follows from the self-consistent implementation of the principle that all energies source the gravitational field according to E=m(c-squared). This makes it an inter... |
2208.10454 | Yafet Sanchez Sanchez | Anne Franzen and Yafet Sanchez Sanchez | Energy Decay in $1+1$ Rindler Spacetime | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider solutions of the massless scalar wave equation $\Box_g\psi=0$ on
a fixed Rindler background and show polynomial decay of the energy flux related
to the Rindler observers near null infinity and to local observers near the
Rindler horizon. The main estimates are obtained via the vector field method
using su... | [
{
"created": "Mon, 22 Aug 2022 17:18:35 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Apr 2024 13:48:40 GMT",
"version": "v2"
}
] | 2024-04-18 | [
[
"Franzen",
"Anne",
""
],
[
"Sanchez",
"Yafet Sanchez",
""
]
] | We consider solutions of the massless scalar wave equation $\Box_g\psi=0$ on a fixed Rindler background and show polynomial decay of the energy flux related to the Rindler observers near null infinity and to local observers near the Rindler horizon. The main estimates are obtained via the vector field method using suit... |
2408.02729 | Sebastian Murk | Sebastian Murk, Daniel R. Terno, Rama Vadapalli | Gravity-induced birefringence in spherically symmetric spacetimes | 13 pages, 6 figures, 4 tables. Comments welcome! | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Geometric optics effectively describes the propagation of electromagnetic
waves when the wavelength is much smaller than the characteristic length scale
of the medium, making wave phenomena like diffraction negligible. As a result,
light propagation in a vacuum is typically modeled by rays that follow null
geodesics.... | [
{
"created": "Mon, 5 Aug 2024 18:00:01 GMT",
"version": "v1"
}
] | 2024-08-07 | [
[
"Murk",
"Sebastian",
""
],
[
"Terno",
"Daniel R.",
""
],
[
"Vadapalli",
"Rama",
""
]
] | Geometric optics effectively describes the propagation of electromagnetic waves when the wavelength is much smaller than the characteristic length scale of the medium, making wave phenomena like diffraction negligible. As a result, light propagation in a vacuum is typically modeled by rays that follow null geodesics. H... |
1901.08249 | Atsushi Nishizawa | Atsushi Nishizawa and Shun Arai | Generalized framework for testing gravity with gravitational-wave
propagation. III. Future prospect | 22 pages, 16 figures | Phys. Rev. D 99, 104038 (2019) | 10.1103/PhysRevD.99.104038 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The properties of gravitational-wave (GW) propagation are modified in
alternative theories of gravity and are crucial observables to test gravity at
cosmological distance. The propagation speed has already been measured from
GW170817 so precisely and pinned down to the speed of light, while other
properties of GW pro... | [
{
"created": "Thu, 24 Jan 2019 06:35:57 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Apr 2019 15:51:48 GMT",
"version": "v2"
}
] | 2019-05-22 | [
[
"Nishizawa",
"Atsushi",
""
],
[
"Arai",
"Shun",
""
]
] | The properties of gravitational-wave (GW) propagation are modified in alternative theories of gravity and are crucial observables to test gravity at cosmological distance. The propagation speed has already been measured from GW170817 so precisely and pinned down to the speed of light, while other properties of GW propa... |
1712.09055 | Rodrigo Olea | Pablo Guilleminot, Rodrigo Olea, Alexander N. Petrov | Constant curvature black holes in Einstein AdS gravity: Euclidean action
and thermodynamics | 13 pages, no figures, one reference added, final version for PRD | Phys. Rev. D 97, 064046 (2018) | 10.1103/PhysRevD.97.064046 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the Euclidean action for constant curvature black holes (CCBHs),
as an attempt to associate thermodynamic quantities to these solutions of
Einstein anti-de Sitter (AdS) gravity. CCBHs are gravitational configurations
obtained by identifications along isometries of a $D$-dimensional globally AdS
space, such... | [
{
"created": "Mon, 25 Dec 2017 11:02:54 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Mar 2018 17:34:15 GMT",
"version": "v2"
}
] | 2018-04-04 | [
[
"Guilleminot",
"Pablo",
""
],
[
"Olea",
"Rodrigo",
""
],
[
"Petrov",
"Alexander N.",
""
]
] | We compute the Euclidean action for constant curvature black holes (CCBHs), as an attempt to associate thermodynamic quantities to these solutions of Einstein anti-de Sitter (AdS) gravity. CCBHs are gravitational configurations obtained by identifications along isometries of a $D$-dimensional globally AdS space, such t... |
1003.0874 | Mubasher Jamil | Farook Rahaman, Mubasher Jamil, Ranjan Sharma and Kausik Chakraborty | A class of solutions for anisotropic stars admitting conformal motion | 9 pages, 16 figures, accepted for publication in "Astrophysics and
Space Science" | Astrophys.Space Sci.330:249-256,2010 | 10.1007/s10509-010-0384-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a new class of interior solutions for anisotropic stars admitting
conformal motion. The Einstein's field equations in this construction are
solved for specific choices of the density/mass functions. We analyze the
behavior of the model parameters like radial and transverse pressures, density
and surface te... | [
{
"created": "Wed, 3 Mar 2010 18:44:40 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Apr 2010 16:53:51 GMT",
"version": "v2"
}
] | 2010-11-03 | [
[
"Rahaman",
"Farook",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Sharma",
"Ranjan",
""
],
[
"Chakraborty",
"Kausik",
""
]
] | We provide a new class of interior solutions for anisotropic stars admitting conformal motion. The Einstein's field equations in this construction are solved for specific choices of the density/mass functions. We analyze the behavior of the model parameters like radial and transverse pressures, density and surface tens... |
2008.07060 | P Ajith | Srashti Goyal, K. Haris, Ajit Kumar Mehta, Parameswaran Ajith | Testing the nature of gravitational-wave polarizations using strongly
lensed signals | 9 pages, 6 figs | Phys. Rev. D 103, 024038 (2021) | 10.1103/PhysRevD.103.024038 | LIGO-P2000295-v1 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave (GW) observations by a network of ground-based laser
interferometric detectors allow us to probe the nature of GW polarizations.
This would be an interesting test of general relativity (GR), since GR predicts
only two polarization modes while there are theories of gravity that predict up
to six pol... | [
{
"created": "Mon, 17 Aug 2020 02:20:52 GMT",
"version": "v1"
}
] | 2021-01-27 | [
[
"Goyal",
"Srashti",
""
],
[
"Haris",
"K.",
""
],
[
"Mehta",
"Ajit Kumar",
""
],
[
"Ajith",
"Parameswaran",
""
]
] | Gravitational-wave (GW) observations by a network of ground-based laser interferometric detectors allow us to probe the nature of GW polarizations. This would be an interesting test of general relativity (GR), since GR predicts only two polarization modes while there are theories of gravity that predict up to six polar... |
1506.04343 | Joseph Mitchell | Joseph M. Mitchell | Where are the BTZ Black Hole Degrees of Freedom? | 9 pages, 1 figure; reference added, minor changes | Class Quantum Grav. 32 235009 2015 | 10.1088/0264-9381/32/23/235009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Previous derivations of the BTZ black hole entropy from a dual conformal
description place the degrees of freedom at spatial infinity. Here it is shown
for the non-rotating case that a dual conformal description exists at any
location around the black hole, a result that has a strong physical appeal
considering that ... | [
{
"created": "Sun, 14 Jun 2015 01:21:09 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jul 2015 22:19:57 GMT",
"version": "v2"
}
] | 2016-03-15 | [
[
"Mitchell",
"Joseph M.",
""
]
] | Previous derivations of the BTZ black hole entropy from a dual conformal description place the degrees of freedom at spatial infinity. Here it is shown for the non-rotating case that a dual conformal description exists at any location around the black hole, a result that has a strong physical appeal considering that in... |
1506.08651 | Ahmed Farag Ali | Mir Hameeda, Mir Faizal, Ahmed Farag Ali | Clustering of Galaxies in Brane World Models | 12 pages, revtex4, 2 figures, To appear in General Relativity and
Gravitation | Gen.Rel.Grav. 48 (2016) no.4, 47 | 10.1007/s10714-016-2049-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we analyze the clustering of galaxies using a modified
Newtonian potential. This modification of the Newtonian potential occurs due to
the existence of extra dimensions in brane world models. We will analyze a
system of galaxies interacting with each other through this modified Newtonian
potential. The... | [
{
"created": "Sun, 14 Jun 2015 05:14:28 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Mar 2016 00:46:23 GMT",
"version": "v2"
}
] | 2016-04-05 | [
[
"Hameeda",
"Mir",
""
],
[
"Faizal",
"Mir",
""
],
[
"Ali",
"Ahmed Farag",
""
]
] | In this paper, we analyze the clustering of galaxies using a modified Newtonian potential. This modification of the Newtonian potential occurs due to the existence of extra dimensions in brane world models. We will analyze a system of galaxies interacting with each other through this modified Newtonian potential. The p... |
1611.02389 | Olivier Sarbach | Paola Rioseco and Olivier Sarbach | Accretion of a relativistic, collisionless kinetic gas into a
Schwarzschild black hole | 38 pages, 6 figures. Updated version with typos corrected. To appear
in Classical and Quantum Gravity | null | 10.1088/1361-6382/aa65fa | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a systematic study for the accretion of a collisionless,
relativistic kinetic gas into a nonrotating black hole. To this end, we first
solve the relativistic Liouville equation on a Schwarzschild background
spacetime. The most general solution for the distribution function is given in
terms of appropriate ... | [
{
"created": "Tue, 8 Nov 2016 05:00:09 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Mar 2017 17:44:53 GMT",
"version": "v2"
}
] | 2017-04-19 | [
[
"Rioseco",
"Paola",
""
],
[
"Sarbach",
"Olivier",
""
]
] | We provide a systematic study for the accretion of a collisionless, relativistic kinetic gas into a nonrotating black hole. To this end, we first solve the relativistic Liouville equation on a Schwarzschild background spacetime. The most general solution for the distribution function is given in terms of appropriate sy... |
gr-qc/9604044 | Euejin Jeong | Eue Jin Jeong | Anomalous Center of Mass Shift: Gravitational Dipole Moment | Latex, 19 pages, 3 Figures, General Revision | null | null | null | gr-qc astro-ph | null | The anomalous, energy dependent shift of the center of mass of an idealized,
perfectly rigid, uniformly rotating hemispherical shell which is caused by the
relativistic mass increase effect is investigated in detail. It is shown that a
classical object on impact which has the harmonic binding force between the
adjace... | [
{
"created": "Wed, 24 Apr 1996 05:00:58 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Dec 1996 02:44:02 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Dec 1996 05:20:12 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Jeong",
"Eue Jin",
""
]
] | The anomalous, energy dependent shift of the center of mass of an idealized, perfectly rigid, uniformly rotating hemispherical shell which is caused by the relativistic mass increase effect is investigated in detail. It is shown that a classical object on impact which has the harmonic binding force between the adjacent... |
1303.3241 | Daniel Siemssen | Nicola Pinamonti and Daniel Siemssen | Scale-Invariant Curvature Fluctuations from an Extended Semiclassical
Gravity | 16 pages, 2 figures; final version | J, Math. Phys. 56, 022303 (2015) | 10.1063/1.4908127 | null | gr-qc astro-ph.CO math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an extension of the semiclassical Einstein equations which couples
n-point correlation functions of a stochastic Einstein tensor to the n-point
functions of the quantum stress-energy tensor. We apply this extension to
calculate the quantum fluctuations during an inflationary period, where we take
as a mode... | [
{
"created": "Wed, 13 Mar 2013 18:28:44 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Apr 2013 13:21:00 GMT",
"version": "v2"
},
{
"created": "Sat, 7 Mar 2015 21:44:39 GMT",
"version": "v3"
}
] | 2015-03-10 | [
[
"Pinamonti",
"Nicola",
""
],
[
"Siemssen",
"Daniel",
""
]
] | We present an extension of the semiclassical Einstein equations which couples n-point correlation functions of a stochastic Einstein tensor to the n-point functions of the quantum stress-energy tensor. We apply this extension to calculate the quantum fluctuations during an inflationary period, where we take as a model ... |
2304.09671 | Gary Nash | Gary Nash | Modified General Relativity and dark matter | International Journal of Modern Physics D. Updated Orthogonal
Decomposition Theorem and gravitational energy density | null | 10.1142/S0218271823500311 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified General Relativity (MGR) is the natural extension of General
Relativity (GR). MGR explicitly uses the smooth regular line element vector
field $(\bm{X},-\bm{X}) $, which exists in all Lorentzian spacetimes, to
construct a connection-independent symmetric tensor that represents the
energy-momentum of the grav... | [
{
"created": "Wed, 19 Apr 2023 14:00:51 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Feb 2024 20:01:56 GMT",
"version": "v2"
}
] | 2024-02-28 | [
[
"Nash",
"Gary",
""
]
] | Modified General Relativity (MGR) is the natural extension of General Relativity (GR). MGR explicitly uses the smooth regular line element vector field $(\bm{X},-\bm{X}) $, which exists in all Lorentzian spacetimes, to construct a connection-independent symmetric tensor that represents the energy-momentum of the gravit... |
1308.2981 | S Habib Mazharimousavi | S. Habib Mazharimousavi and M. Halilsoy | One dimensional Newton's equation with variable mass | 6 pages, no figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit Newton's equation of motion in one dimension when the moving
particle has a variable mass m(x,t) depending both on position (x) and time
(t). Geometrically the mass function is identified with one of the metric
function in a 1+1-dimensional spacetime. As a reflection of the equivalence
principle geodesics ... | [
{
"created": "Sat, 6 Jul 2013 19:07:23 GMT",
"version": "v1"
}
] | 2013-08-15 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
]
] | We revisit Newton's equation of motion in one dimension when the moving particle has a variable mass m(x,t) depending both on position (x) and time (t). Geometrically the mass function is identified with one of the metric function in a 1+1-dimensional spacetime. As a reflection of the equivalence principle geodesics eq... |
2004.05974 | Sayak Datta | Sayak Datta, Khun Sang Phukon and Sukanta Bose | Recognizing black holes in gravitational-wave observations: Challenges
in telling apart impostors in mass-gap binaries | null | Phys. Rev. D 104, 084006 (2021) | 10.1103/PhysRevD.104.084006 | LIGO-P2000115 | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We study how by careful monitoring of the presence or absence of tidal
deformability (TD) and tidal-heating (TH) in the inspiral signal of compact
object binaries in ground-based gravitational wave (GW) detectors, one can test
if its components are black holes or not. The former property (TD) is finite
for neutron st... | [
{
"created": "Mon, 13 Apr 2020 14:49:13 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jul 2021 10:01:42 GMT",
"version": "v2"
}
] | 2021-10-04 | [
[
"Datta",
"Sayak",
""
],
[
"Phukon",
"Khun Sang",
""
],
[
"Bose",
"Sukanta",
""
]
] | We study how by careful monitoring of the presence or absence of tidal deformability (TD) and tidal-heating (TH) in the inspiral signal of compact object binaries in ground-based gravitational wave (GW) detectors, one can test if its components are black holes or not. The former property (TD) is finite for neutron star... |
gr-qc/0107069 | Marco Bruni | Marco Bruni (University of Portsmouth), Filipe C. Mena and Reza
Tavakol (Queen Mary, University of London) | Cosmic no-hair: non-linear asymptotic stability of de Sitter universe | 8 pages, REVTEX, submitted to Physical Review Letter | Class.Quant.Grav.19:L23-L29,2002 | 10.1088/0264-9381/19/5/101 | null | gr-qc astro-ph hep-ph | null | We study the asymptotic stability of de Sitter spacetime with respect to
non-linear perturbations, by considering second order perturbations of a flat
Robertson-Walker universe with dust and a positive cosmological constant. Using
the synchronous comoving gauge we find that, as in the case of linear
perturbations, th... | [
{
"created": "Fri, 20 Jul 2001 22:46:01 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Jul 2001 22:43:19 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Bruni",
"Marco",
"",
"University of Portsmouth"
],
[
"Mena",
"Filipe C.",
"",
"Queen Mary, University of London"
],
[
"Tavakol",
"Reza",
"",
"Queen Mary, University of London"
]
] | We study the asymptotic stability of de Sitter spacetime with respect to non-linear perturbations, by considering second order perturbations of a flat Robertson-Walker universe with dust and a positive cosmological constant. Using the synchronous comoving gauge we find that, as in the case of linear perturbations, the ... |
gr-qc/0411117 | Eugeniu Popescu | Laurent Freidel, R.B. Mann, Eugeniu M. Popescu | Canonical analysis of the BCEA topological matter model coupled to
gravitation in (2+1) dimensions | 17 pages, no figures | Class.Quant.Grav. 22 (2005) 3363-3380 | 10.1088/0264-9381/22/16/015 | null | gr-qc | null | We consider a topological field theory derived from the Chern - Simons action
in (2+1) dimensions with the I(ISO(2,1)) group,and we investigate in detail the
canonical structure of this theory.Originally developed as a topological theory
of Einstein gravity minimally coupled to topological matter fields in (2+1)
dime... | [
{
"created": "Thu, 25 Nov 2004 04:41:32 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Freidel",
"Laurent",
""
],
[
"Mann",
"R. B.",
""
],
[
"Popescu",
"Eugeniu M.",
""
]
] | We consider a topological field theory derived from the Chern - Simons action in (2+1) dimensions with the I(ISO(2,1)) group,and we investigate in detail the canonical structure of this theory.Originally developed as a topological theory of Einstein gravity minimally coupled to topological matter fields in (2+1) dimens... |
2311.12069 | Lorenzo Pieri Dr. | Lorenzo Pieri | Hyperwave: Hyper-Fast Communication within General Relativity | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Warp-drives are solutions of general relativity widely considered unphysical
due to high negative energy requirements. While the majority of the literature
has focused on macroscopic solutions towards the goal of interstellar travel,
in this work we explore what happens in the small radius limit. In this regime
the m... | [
{
"created": "Sun, 19 Nov 2023 18:30:35 GMT",
"version": "v1"
},
{
"created": "Thu, 16 May 2024 19:53:50 GMT",
"version": "v2"
}
] | 2024-05-20 | [
[
"Pieri",
"Lorenzo",
""
]
] | Warp-drives are solutions of general relativity widely considered unphysical due to high negative energy requirements. While the majority of the literature has focused on macroscopic solutions towards the goal of interstellar travel, in this work we explore what happens in the small radius limit. In this regime the mag... |
0805.2536 | Etera R. Livine | Etera R. Livine, Daniel R. Terno | The entropic boundary law in BF theory | 17 pages | Nucl.Phys.B806:715-734,2009 | 10.1016/j.nuclphysb.2008.08.004 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the entropy of a closed bounded region of space for pure 3d
Riemannian gravity formulated as a topological BF theory for the gauge group
SU(2) and show its holographic behavior. More precisely, we consider a fixed
graph embedded in space and study the flat connection spin network state
without and with par... | [
{
"created": "Fri, 16 May 2008 13:56:58 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Livine",
"Etera R.",
""
],
[
"Terno",
"Daniel R.",
""
]
] | We compute the entropy of a closed bounded region of space for pure 3d Riemannian gravity formulated as a topological BF theory for the gauge group SU(2) and show its holographic behavior. More precisely, we consider a fixed graph embedded in space and study the flat connection spin network state without and with parti... |
0906.4844 | Carlo Cafaro | Carlo Cafaro and S. A. Ali | Analytical Estimate of Atmospheric Newtonian Noise Generated by Acoustic
and Turbulent Phenomena in Laser-Interferometric Gravitational Waves
Detectors | v2: few changes, one table and references added, 17 pages, no
figures; accepted for publication (special issue) in the Open Astronomy
Journal | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a theoretical estimate of the atmospheric Newtonian noise due to
fluctuations of atmospheric mass densities generated by acoustic and turbulent
phenomena and we determine the relevance of such noise in the
laser-interferometric detection of gravitational waves. First, we consider the
gravitational coupling... | [
{
"created": "Fri, 26 Jun 2009 09:11:33 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Dec 2009 09:12:06 GMT",
"version": "v2"
}
] | 2009-12-16 | [
[
"Cafaro",
"Carlo",
""
],
[
"Ali",
"S. A.",
""
]
] | We present a theoretical estimate of the atmospheric Newtonian noise due to fluctuations of atmospheric mass densities generated by acoustic and turbulent phenomena and we determine the relevance of such noise in the laser-interferometric detection of gravitational waves. First, we consider the gravitational coupling o... |
2104.11912 | Wei-Liang Qian | Hang Liu and Wei-Liang Qian and Yunqi Liu and Jian-Pin Wu and Bin Wang
and Rui-Hong Yue | On an alternative mechanism for the black hole echoes | 14 pages and 9 figures | Phys. Rev. D 104, 044012 (2021) | 10.1103/PhysRevD.104.044012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave echoes from the black holes have been suggested as a
crucial observable to probe the spacetime in the vicinity of the horizon. In
particular, it was speculated that the echoes are closely connected with
specific characteristics of the exotic compact objects, and moreover, possibly
provide an access... | [
{
"created": "Sat, 24 Apr 2021 09:04:13 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jun 2021 15:49:35 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Jun 2021 16:00:16 GMT",
"version": "v3"
},
{
"created": "Thu, 8 Jul 2021 15:09:26 GMT",
"version": "v4"
}
] | 2021-08-11 | [
[
"Liu",
"Hang",
""
],
[
"Qian",
"Wei-Liang",
""
],
[
"Liu",
"Yunqi",
""
],
[
"Wu",
"Jian-Pin",
""
],
[
"Wang",
"Bin",
""
],
[
"Yue",
"Rui-Hong",
""
]
] | Gravitational wave echoes from the black holes have been suggested as a crucial observable to probe the spacetime in the vicinity of the horizon. In particular, it was speculated that the echoes are closely connected with specific characteristics of the exotic compact objects, and moreover, possibly provide an access t... |
1205.3790 | Rafael Perez | R.S. Perez, N. Pinto-Neto | Spherically Symmetric Inflation | Latex file, 4 pages, no figures | Gravitation and Cosmology, Volume 17, Number 2 (2011), 136-140 | 10.1134/S0202289311020174 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown in this letter that in the framework of an inhomogeneous geometry
and a massive non self-interacting scalar field with spherical symmetry, one
needs a homogeneous patch bigger than a dizaine of horizons in order to start
inflation. The results are completly independent of initial conditions on the
spatial... | [
{
"created": "Wed, 16 May 2012 20:00:48 GMT",
"version": "v1"
}
] | 2012-05-18 | [
[
"Perez",
"R. S.",
""
],
[
"Pinto-Neto",
"N.",
""
]
] | It is shown in this letter that in the framework of an inhomogeneous geometry and a massive non self-interacting scalar field with spherical symmetry, one needs a homogeneous patch bigger than a dizaine of horizons in order to start inflation. The results are completly independent of initial conditions on the spatial d... |
gr-qc/0510075 | Yakov Itin | Yakov Itin | Maxwell-type behaviour from a geometrical structure | 25 pages, 3 figures. Printed version | Class. Quantum Grav. 23 3361-3384 (2006) | 10.1088/0264-9381/23/10/008 | null | gr-qc hep-ph hep-th math.DG | null | We study which geometric structure can be constructed from the vierbein
(frame/coframe) variables and which field models can be related to this
geometry. The coframe field models, alternative to GR, are known as viable
models for gravity, since they have the Schwarzschild solution. Since the local
Lorentz invariance ... | [
{
"created": "Sun, 16 Oct 2005 17:43:07 GMT",
"version": "v1"
},
{
"created": "Wed, 31 May 2006 18:08:14 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Itin",
"Yakov",
""
]
] | We study which geometric structure can be constructed from the vierbein (frame/coframe) variables and which field models can be related to this geometry. The coframe field models, alternative to GR, are known as viable models for gravity, since they have the Schwarzschild solution. Since the local Lorentz invariance is... |
gr-qc/9606021 | Neil Cornish | Neil Cornish (DAMTP, Cambridge), Norm Frankel (Univ. Melbourne) | The Princess and the Pea | 5 pages, RevTeX, 6 figures, revised and expanded version | Phys.Rev. D56 (1997) 1903-1907 | 10.1103/PhysRevD.56.1903 | UM-P-96/45 | gr-qc | null | Like a fairy-tale princess, trajectories around black holes can be sensitive
to small disturbances. We describe how a small disturbance can lead to erratic
orbits and an increased production of gravitational waves.
| [
{
"created": "Tue, 11 Jun 1996 12:10:58 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jan 1997 13:42:15 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Cornish",
"Neil",
"",
"DAMTP, Cambridge"
],
[
"Frankel",
"Norm",
"",
"Univ. Melbourne"
]
] | Like a fairy-tale princess, trajectories around black holes can be sensitive to small disturbances. We describe how a small disturbance can lead to erratic orbits and an increased production of gravitational waves. |
gr-qc/0011107 | Simonetta Frittelli | Simonetta Frittelli, Thomas P. Kling and Ezra T. Newman | Image distortion in non perturbative gravitational lensing | 22 pages, 6 figures, to appear in Phys. Rev. D (January 2001) | Phys.Rev. D63 (2001) 023006 | 10.1103/PhysRevD.63.023006 | null | gr-qc | null | We introduce the idea of {\it shape parameters} to describe the shape of the
pencil of rays connecting an observer with a source lying on his past
lightcone. On the basis of these shape parameters, we discuss a setting of
image distortion in a generic (exact) spacetime, in the form of three {\it
distortion parameters... | [
{
"created": "Wed, 29 Nov 2000 15:31:04 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Frittelli",
"Simonetta",
""
],
[
"Kling",
"Thomas P.",
""
],
[
"Newman",
"Ezra T.",
""
]
] | We introduce the idea of {\it shape parameters} to describe the shape of the pencil of rays connecting an observer with a source lying on his past lightcone. On the basis of these shape parameters, we discuss a setting of image distortion in a generic (exact) spacetime, in the form of three {\it distortion parameters}.... |
1506.01795 | Haryanto Siahaan | Haryanto M. Siahaan | Higher Spins Tunneling from a Time Dependent and Spherically Symmetric
Black Hole | 18 pages, no figures; v3: refs added | Eur. Phys. J. C (2016) 76:139 | 10.1140/epjc/s10052-016-3986-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The discussions of Hawking radiation via tunneling method have been performed
extensively in the case of scalar particles. Moreover, there are also several
works in discussing the tunneling method for Hawking radiation by using higher
spins, e.g. neutrino, photon, and gravitino, in the background of static black
hole... | [
{
"created": "Fri, 5 Jun 2015 07:03:04 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Jun 2015 09:26:38 GMT",
"version": "v2"
},
{
"created": "Sun, 6 Mar 2016 15:43:09 GMT",
"version": "v3"
}
] | 2016-03-15 | [
[
"Siahaan",
"Haryanto M.",
""
]
] | The discussions of Hawking radiation via tunneling method have been performed extensively in the case of scalar particles. Moreover, there are also several works in discussing the tunneling method for Hawking radiation by using higher spins, e.g. neutrino, photon, and gravitino, in the background of static black holes.... |
gr-qc/0003082 | Frank J. Tipler | Frank J. Tipler, Jessica Graber, Matthew McGinley, Joshua
Nichols-Barrer, and Christopher Staecker | Closed Universes With Black Holes But No Event Horizons As a Solution to
the Black Hole Information Problem | 27 pages in LaTex2e, no figures | Mon.Not.Roy.Astron.Soc.379:629-640,2007 | 10.1111/j.1365-2966.2007.11895.x | null | gr-qc | null | We show it is possible for the information paradox in black hole evaporation
to be resolved classically. Using standard junction conditions, we attach the
general closed spherically symmetric dust metric to a spacetime satisfying all
standard energy conditions but with a single point future c-boundary. The
resulting ... | [
{
"created": "Mon, 20 Mar 2000 20:43:00 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Tipler",
"Frank J.",
""
],
[
"Graber",
"Jessica",
""
],
[
"McGinley",
"Matthew",
""
],
[
"Nichols-Barrer",
"Joshua",
""
],
[
"Staecker",
"Christopher",
""
]
] | We show it is possible for the information paradox in black hole evaporation to be resolved classically. Using standard junction conditions, we attach the general closed spherically symmetric dust metric to a spacetime satisfying all standard energy conditions but with a single point future c-boundary. The resulting Om... |
gr-qc/0201058 | Irina Dymnikowa | Irina Dymnikova | From vacuum nonsingular black hole to variable cosmological constant | 11 pages Revtex, 12 figures, plenary talk at the 5-th International
Conference on Cosmoparticle Physics, Moscow-St.Petersburg, 21-30 May 2001 | Grav.Cosmol.Suppl. 8N1 (2002) 131-147 | null | null | gr-qc | null | We outline the class of globally regular spherically symmetric solutions to
the minimally coupled GR equations asymptotically de Sitter in the origin and
asymptotically Schwarzschild at infinity. A source term connects smoothly de
Sitter vacuum at the regular center with Minkowski vacuum at infinity and
corresponds t... | [
{
"created": "Thu, 17 Jan 2002 12:43:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dymnikova",
"Irina",
""
]
] | We outline the class of globally regular spherically symmetric solutions to the minimally coupled GR equations asymptotically de Sitter in the origin and asymptotically Schwarzschild at infinity. A source term connects smoothly de Sitter vacuum at the regular center with Minkowski vacuum at infinity and corresponds to ... |
gr-qc/9906038 | Stoytcho Yazadjiev | S. Yazadjiev | Tensor mass and particle number peak at the same location in the
scalar-tensor gravity boson star models - an analytical proof | 9 pages, latex, no figers, some typos corrected, reference added | Class.Quant.Grav.16:L63-L69,1999 | 10.1088/0264-9381/16/10/102 | SUPHY 9913 | gr-qc | null | Recently in boson star models in framework of Brans-Dicke theory, three
possible definitions of mass have been identified, all identical in general
relativity, but different in scalar-tensor theories of gravity.It has been
conjectured that it's the tensor mass which peaks, as a function of the central
density, at the... | [
{
"created": "Fri, 11 Jun 1999 10:58:33 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Jun 1999 09:11:11 GMT",
"version": "v2"
},
{
"created": "Sun, 31 Oct 1999 22:16:45 GMT",
"version": "v3"
}
] | 2010-04-06 | [
[
"Yazadjiev",
"S.",
""
]
] | Recently in boson star models in framework of Brans-Dicke theory, three possible definitions of mass have been identified, all identical in general relativity, but different in scalar-tensor theories of gravity.It has been conjectured that it's the tensor mass which peaks, as a function of the central density, at the s... |
2006.02564 | Roldao da Rocha | P. Meert, R. da Rocha | Probing the minimal geometric deformation with trace and Weyl anomalies | 8 pages | Nucl. Phys. B 967 (2021) 115420 | 10.1016/j.nuclphysb.2021.115420 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The method of minimal geometric deformation (MGD) is used to derive static,
strongly gravitating, spherically symmetric, compact stellar distributions. The
trace and Weyl anomalies are then employed to probe the MGD in the holographic
setup, as a realistic model, playing a prominent role in AdS/CFT.
| [
{
"created": "Wed, 3 Jun 2020 22:24:46 GMT",
"version": "v1"
},
{
"created": "Sun, 2 May 2021 00:40:16 GMT",
"version": "v2"
}
] | 2021-05-04 | [
[
"Meert",
"P.",
""
],
[
"da Rocha",
"R.",
""
]
] | The method of minimal geometric deformation (MGD) is used to derive static, strongly gravitating, spherically symmetric, compact stellar distributions. The trace and Weyl anomalies are then employed to probe the MGD in the holographic setup, as a realistic model, playing a prominent role in AdS/CFT. |
1802.07033 | Madhavan Varadarajan | Madhavan Varadarajan | The constraint algebra in Smolins' $G\rightarrow 0$ limit of 4d
Euclidean Gravity | 123 pages, 7 figures | Phys. Rev. D 97, 106007 (2018) | 10.1103/PhysRevD.97.106007 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Smolin's generally covariant $G_{\mathrm{Newton}}\rightarrow0$ limit of 4d
Euclidean gravity is a useful toy model for the study of the constraint algebra
in Loop Quantum Gravity. In particular, the commutator between its Hamiltonian
constraints has a metric dependent structure function. While a prior LQG like
constr... | [
{
"created": "Tue, 20 Feb 2018 09:53:04 GMT",
"version": "v1"
}
] | 2018-05-23 | [
[
"Varadarajan",
"Madhavan",
""
]
] | Smolin's generally covariant $G_{\mathrm{Newton}}\rightarrow0$ limit of 4d Euclidean gravity is a useful toy model for the study of the constraint algebra in Loop Quantum Gravity. In particular, the commutator between its Hamiltonian constraints has a metric dependent structure function. While a prior LQG like construc... |
1805.10655 | Amitabh Virmani | Srijit Bhattacharjee, Bidisha Chakrabarty, David D. K. Chow, Partha
Paul, and Amitabh Virmani | On Late Time Tails in an Extreme Reissner-Nordstr\"om Black Hole:
Frequency Domain Analysis | 22 pages; 2 figures | null | 10.1088/1361-6382/aade59 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this brief note, we revisit the study of the leading order late time decay
tails of massless scalar perturbations outside an extreme Reissner-Nordstr\"om
black hole. Previous authors have analysed this problem in the time domain; we
analyse the problem in the frequency domain. We first consider initial
perturbatio... | [
{
"created": "Sun, 27 May 2018 17:10:38 GMT",
"version": "v1"
}
] | 2018-10-17 | [
[
"Bhattacharjee",
"Srijit",
""
],
[
"Chakrabarty",
"Bidisha",
""
],
[
"Chow",
"David D. K.",
""
],
[
"Paul",
"Partha",
""
],
[
"Virmani",
"Amitabh",
""
]
] | In this brief note, we revisit the study of the leading order late time decay tails of massless scalar perturbations outside an extreme Reissner-Nordstr\"om black hole. Previous authors have analysed this problem in the time domain; we analyse the problem in the frequency domain. We first consider initial perturbations... |
1907.03549 | Grigoris Panotopoulos | Il\'idio Lopes, Grigoris Panotopoulos, \'Angel Rinc\'on | Anisotropic strange quark stars with a non-linear equation-of-state | 8 pages, 3 tables, 3 figures, accepted for publication in EPJ Plus | null | null | null | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain an exact analytical solution to Einstein's field equations assuming
a non-linear equation-of-state and a particular mass function. Our solution
describes the interior of anisotropic color flavor locked strange quark stars.
All energy conditions are fulfilled, and therefore the solution obtained here
is a re... | [
{
"created": "Fri, 5 Jul 2019 10:16:33 GMT",
"version": "v1"
}
] | 2019-07-09 | [
[
"Lopes",
"Ilídio",
""
],
[
"Panotopoulos",
"Grigoris",
""
],
[
"Rincón",
"Ángel",
""
]
] | We obtain an exact analytical solution to Einstein's field equations assuming a non-linear equation-of-state and a particular mass function. Our solution describes the interior of anisotropic color flavor locked strange quark stars. All energy conditions are fulfilled, and therefore the solution obtained here is a real... |
gr-qc/9605023 | Kouichirou Hirata | Jiro Soda (Theoretical Physics Institute, University of Alberta) and
Kouichirou Hirata (GSHES, Kyoto University) | Higher Dimensional Self-similar Spherical Symmetric Scalar Field
Collapse and Critical Phenomena in Black Hole Formation | 14 pages, 3 Postscript figures, uses LaTeX | Phys.Lett.B387:271-277,1996 | 10.1016/0370-2693(96)00995-1 | KUCP-0097 | gr-qc | null | The higher dimensional spherical symmetric scalar field collapse problem is
studied in the light of the critical behavior in black hole formation. To make
the analysis tractable, the self similarity is also imposed. By giving a new
view to the self-similar scalar field collapse problem, we give the general
formula fo... | [
{
"created": "Sat, 11 May 1996 11:38:34 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Soda",
"Jiro",
"",
"Theoretical Physics Institute, University of Alberta"
],
[
"Hirata",
"Kouichirou",
"",
"GSHES, Kyoto University"
]
] | The higher dimensional spherical symmetric scalar field collapse problem is studied in the light of the critical behavior in black hole formation. To make the analysis tractable, the self similarity is also imposed. By giving a new view to the self-similar scalar field collapse problem, we give the general formula for ... |
1812.01990 | Phongpichit Channuie | Phongpichit Channuie (Walailak U.), Davood Momeni, Mudhahir Al Ajmi
(Sultan Qaboos U.) | On gravitational wave modes in Nash theory of gravity | v2: typos corrected, no figure, accepted for publication in JMI
International Journal of Mathematical Sciences, soon indexed in ISI | JMI International Journal of Mathematical Sciences (
ISSN:0976-5913) VOL. 10, 2019, 1-9 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this Letter, we consider original Nash theory of gravity. In terms of the
scalar fields representation, Nash gravity is equivalent to the action of
bi-scalar tensor gravity with four derivative terms of metric tensor. We then
quantify the ghost in the theory. In order to study the gravitational wave
modes of the t... | [
{
"created": "Sun, 2 Dec 2018 17:02:24 GMT",
"version": "v1"
},
{
"created": "Mon, 13 May 2019 09:21:03 GMT",
"version": "v2"
}
] | 2020-09-01 | [
[
"Channuie",
"Phongpichit",
"",
"Walailak U."
],
[
"Momeni",
"Davood",
"",
"Sultan Qaboos U."
],
[
"Ajmi",
"Mudhahir Al",
"",
"Sultan Qaboos U."
]
] | In this Letter, we consider original Nash theory of gravity. In terms of the scalar fields representation, Nash gravity is equivalent to the action of bi-scalar tensor gravity with four derivative terms of metric tensor. We then quantify the ghost in the theory. In order to study the gravitational wave modes of the the... |
2211.00491 | Heng-Wei Chang | Heng-Wei Chang | Dark Energy as a Post-Inflation Effect in Quadratic Gravity | 16 pages, 3 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We analytically and numerically show that the acceleration of the cosmic
expansion could be explained by a Quadratic Gravity model which is known to be
able to trigger sufficient inflation, with neither negative pressure matter nor
cosmological constant. Furthermore, we exactly show that this model differs
greatly fr... | [
{
"created": "Mon, 31 Oct 2022 08:19:51 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jan 2023 12:13:37 GMT",
"version": "v2"
},
{
"created": "Sun, 23 Apr 2023 05:12:57 GMT",
"version": "v3"
}
] | 2023-04-25 | [
[
"Chang",
"Heng-Wei",
""
]
] | We analytically and numerically show that the acceleration of the cosmic expansion could be explained by a Quadratic Gravity model which is known to be able to trigger sufficient inflation, with neither negative pressure matter nor cosmological constant. Furthermore, we exactly show that this model differs greatly from... |
0811.1932 | Marcin Kazmierczak | Marcin Kazmierczak | Nonuniqueness of gravity-induced fermion interaction in the
Einstein-Cartan theory | 13 pages, references added, more exhaustive explanations given, typos
corrected | Phys.Rev.D78:124025,2008 | 10.1103/PhysRevD.78.124025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of nonuniqueness of minimal coupling procedure for
Einstein--Cartan (EC) gravity with matter is investigated. It is shown that the
predictions of the theory of gravity with fermionic matter can radically change
if the freedom of addition of a divergence to the flat space matter Lagrangean
density is explo... | [
{
"created": "Wed, 12 Nov 2008 17:12:14 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Nov 2008 13:34:47 GMT",
"version": "v2"
},
{
"created": "Fri, 12 Dec 2008 20:51:24 GMT",
"version": "v3"
}
] | 2015-03-13 | [
[
"Kazmierczak",
"Marcin",
""
]
] | The problem of nonuniqueness of minimal coupling procedure for Einstein--Cartan (EC) gravity with matter is investigated. It is shown that the predictions of the theory of gravity with fermionic matter can radically change if the freedom of addition of a divergence to the flat space matter Lagrangean density is exploit... |
1412.6437 | Nikolaos Mavromatos | Nick E. Mavromatos (King's College London) | Gravitino Condensates in the Early Universe and Inflation | 17 pages latex, uses special macros (EPJC style files), Plenary talk
at 3rd International Conference on New Frontiers in Physics (ICNFP 2014),
Kolymbari (Crete, Greece), July 28- August 6 2014 | null | null | KCL-PH-TH/2014-52, LCTS/2014-52 | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review work on the formation of gravitino condensates via the super-Higgs
effect in the early Universe. This is a scenario for both inflating the early
universe and breaking local supersymmetry (supergravity), entirely independent
of any coupling to external matter. The goldstino mode associated with the
breaking ... | [
{
"created": "Fri, 19 Dec 2014 17:01:35 GMT",
"version": "v1"
}
] | 2014-12-23 | [
[
"Mavromatos",
"Nick E.",
"",
"King's College London"
]
] | We review work on the formation of gravitino condensates via the super-Higgs effect in the early Universe. This is a scenario for both inflating the early universe and breaking local supersymmetry (supergravity), entirely independent of any coupling to external matter. The goldstino mode associated with the breaking of... |
gr-qc/0209070 | Yoshiyuki Morisawa | Yoshiyuki Morisawa, Daisuke Ida, Akihiro Ishibashi, and Ken-ichi Nakao | Thick domain walls around a black hole | 18 pages, 11 figures, one reference added | Phys.Rev. D67 (2003) 025017 | 10.1103/PhysRevD.67.025017 | YITP-02-57,OCU-PHYS-190,AP-GR-6 | gr-qc | null | We discuss the gravitationally interacting system of a thick domain wall and
a black hole. We numerically solve the scalar field equation in the
Schwarzschild spacetime and obtain a sequence of static axi-symmetric solutions
representing thick domain walls. We find that, for the walls near the horizon,
the Nambu--Got... | [
{
"created": "Fri, 20 Sep 2002 12:37:55 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Nov 2002 08:09:05 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Morisawa",
"Yoshiyuki",
""
],
[
"Ida",
"Daisuke",
""
],
[
"Ishibashi",
"Akihiro",
""
],
[
"Nakao",
"Ken-ichi",
""
]
] | We discuss the gravitationally interacting system of a thick domain wall and a black hole. We numerically solve the scalar field equation in the Schwarzschild spacetime and obtain a sequence of static axi-symmetric solutions representing thick domain walls. We find that, for the walls near the horizon, the Nambu--Goto ... |
2211.13276 | Chris Stevens | J\"org Frauendiener, Chris Stevens | The non-linear perturbation of a black hole by gravitational waves. II.
Quasinormal modes and the compactification problem | 19 pages, 8 figures, submitted to CQG | null | 10.1088/1361-6382/acd4b1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, Friedrich's Generalized Conformal Field Equations (GCFE) have been
implemented numerically and global quantities such as the Bondi energy and the
Bondi-Sachs mass loss have been successfully calculated directly on
null-infinity. Although being an attractive option for studying global
quantities by way of lo... | [
{
"created": "Wed, 23 Nov 2022 19:43:12 GMT",
"version": "v1"
}
] | 2023-05-31 | [
[
"Frauendiener",
"Jörg",
""
],
[
"Stevens",
"Chris",
""
]
] | Recently, Friedrich's Generalized Conformal Field Equations (GCFE) have been implemented numerically and global quantities such as the Bondi energy and the Bondi-Sachs mass loss have been successfully calculated directly on null-infinity. Although being an attractive option for studying global quantities by way of loca... |
gr-qc/0201085 | Bayram Tekin | S. Deser | New Properties of Matter in (A)dS and their Consequences | Invited Lecture, Journees Relativistes, Dublin, 2001, 5 pages, 1
figure | Int.J.Mod.Phys.A17:2661-2666,2002 | 10.1142/S0217751X02011576 | BRX TH-497 | gr-qc hep-th | null | I review briefly, primarily for relativists, a series of recent results,
obtained with A. Waldron, on the novel behavior of massive higher (s>1) spin
systems in constant curvature backgrounds. We find that the cosmological
constant Lambda, together with the mass parameter, define a "phase plane" in
which partially ma... | [
{
"created": "Fri, 25 Jan 2002 17:01:37 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Deser",
"S.",
""
]
] | I review briefly, primarily for relativists, a series of recent results, obtained with A. Waldron, on the novel behavior of massive higher (s>1) spin systems in constant curvature backgrounds. We find that the cosmological constant Lambda, together with the mass parameter, define a "phase plane" in which partially mass... |
1912.01723 | Grigoris Panotopoulos | Grigoris Panotopoulos, Angel Rincon, Nelson Videla, Giovanni Otalora | Dynamical systems methods and statefinder diagnostic of interacting
vacuum energy models | Revised version, accepted for publication in EPJC | null | 10.1140/epjc/s10052-020-7828-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study three interacting dark energy models within the framework of
four-dimensional General Relativity and a spatially flat Universe. In
particular, we first consider two vacuum models where dark energy interacts
with dark matter, while relativistic matter as well as baryons are treated as
non-interacting fluid co... | [
{
"created": "Tue, 3 Dec 2019 22:27:25 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Mar 2020 18:13:28 GMT",
"version": "v2"
}
] | 2020-04-22 | [
[
"Panotopoulos",
"Grigoris",
""
],
[
"Rincon",
"Angel",
""
],
[
"Videla",
"Nelson",
""
],
[
"Otalora",
"Giovanni",
""
]
] | We study three interacting dark energy models within the framework of four-dimensional General Relativity and a spatially flat Universe. In particular, we first consider two vacuum models where dark energy interacts with dark matter, while relativistic matter as well as baryons are treated as non-interacting fluid comp... |
1412.4553 | Alessandro Nagar | Sebastiano Bernuzzi, Alessandro Nagar, Tim Dietrich and Thibault
Damour | Modeling the dynamics of tidally-interacting binary neutron stars up to
merger | 5 pages, 4 figures. Matches published version | Phys. Rev. Lett. 114, 161103 (2015) | 10.1103/PhysRevLett.114.161103 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The data analysis of the gravitational wave signals emitted by coalescing
neutron star binaries requires the availability of an accurate analytical
representation of the dynamics and waveforms of these systems. We propose an
effective-one-body (EOB) model that describes the general relativistic dynamics
of neutron st... | [
{
"created": "Mon, 15 Dec 2014 11:55:06 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Feb 2015 10:33:13 GMT",
"version": "v2"
},
{
"created": "Wed, 13 May 2015 14:07:20 GMT",
"version": "v3"
}
] | 2015-05-15 | [
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Nagar",
"Alessandro",
""
],
[
"Dietrich",
"Tim",
""
],
[
"Damour",
"Thibault",
""
]
] | The data analysis of the gravitational wave signals emitted by coalescing neutron star binaries requires the availability of an accurate analytical representation of the dynamics and waveforms of these systems. We propose an effective-one-body (EOB) model that describes the general relativistic dynamics of neutron star... |
2102.02462 | Taiga Miyachi | Taiga Miyachi, Jiro Soda | False vacuum decay in a two-dimensional black hole spacetime | 23 pages, 14 figures | Phys. Rev. D 103, 085009 (2021) | 10.1103/PhysRevD.103.085009 | KOBE-COSMO-21-02 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a false vacuum decay in a two-dimensional black hole spacetime
background. The decay rate in the case that nucleation site locates at a black
hole center has been calculated in the literature. We develop a method for
calculating the decay rate of the false vacuum for a generic nucleation site.
We find that t... | [
{
"created": "Thu, 4 Feb 2021 07:44:27 GMT",
"version": "v1"
}
] | 2021-04-28 | [
[
"Miyachi",
"Taiga",
""
],
[
"Soda",
"Jiro",
""
]
] | We study a false vacuum decay in a two-dimensional black hole spacetime background. The decay rate in the case that nucleation site locates at a black hole center has been calculated in the literature. We develop a method for calculating the decay rate of the false vacuum for a generic nucleation site. We find that the... |
2112.08865 | Cong Zhang | Jerzy Lewandowski, Cong Zhang | Fermion coupling to loop quantum gravity: canonical formulation | 23+4 pages, 3 figures. correction on some typos | Phys. Rev. D 105, 124025 (2022) | 10.1103/PhysRevD.105.124025 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In the model of a fermion field coupled to loop quantum gravity, we consider
the Gauss and the Hamiltonian constraints. According to the explicit solutions
to the Gauss constraint, the fermion spins and the gravitational spin networks
intertwine with each other so that the fermion spins contribute to the volume
of th... | [
{
"created": "Thu, 16 Dec 2021 13:23:18 GMT",
"version": "v1"
},
{
"created": "Sun, 22 May 2022 00:51:28 GMT",
"version": "v2"
},
{
"created": "Mon, 13 Jun 2022 17:06:29 GMT",
"version": "v3"
}
] | 2022-06-14 | [
[
"Lewandowski",
"Jerzy",
""
],
[
"Zhang",
"Cong",
""
]
] | In the model of a fermion field coupled to loop quantum gravity, we consider the Gauss and the Hamiltonian constraints. According to the explicit solutions to the Gauss constraint, the fermion spins and the gravitational spin networks intertwine with each other so that the fermion spins contribute to the volume of the ... |
0710.2742 | Marek Szydlowski | Jakub Mielczarek, Marek Szydlowski | Relic gravitons from super-inflation | RevTeX4, 11 pages, 4 figures | null | null | null | gr-qc | null | The super-inflationary phase is predicted by the Loop Quantum Cosmology. In
this paper we study the creation of gravitational waves during this phase. We
consider the inverse volume corrections to the equation for the tensor modes
and calculate the spectrum of the produced gravitons. The amplitude of the
obtained spe... | [
{
"created": "Mon, 15 Oct 2007 09:04:55 GMT",
"version": "v1"
}
] | 2007-10-16 | [
[
"Mielczarek",
"Jakub",
""
],
[
"Szydlowski",
"Marek",
""
]
] | The super-inflationary phase is predicted by the Loop Quantum Cosmology. In this paper we study the creation of gravitational waves during this phase. We consider the inverse volume corrections to the equation for the tensor modes and calculate the spectrum of the produced gravitons. The amplitude of the obtained spect... |
0811.1691 | Carles Bona | Daniela Alic, Carles Bona and Carles Bona-Casas | Towards a gauge-polyvalent Numerical Relativity code | to appear in Physical Review D | Phys.Rev.D79:044026,2009 | 10.1103/PhysRevD.79.044026 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gauge polyvalence of a new numerical code is tested, both in
harmonic-coordinate simulations (gauge-waves testbed) and in
singularity-avoiding coordinates (simple Black-Hole simulations, either with or
without shift). The code is built upon an adjusted first-order
flux-conservative version of the Z4 formalism and... | [
{
"created": "Tue, 11 Nov 2008 11:58:27 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Feb 2009 10:58:00 GMT",
"version": "v2"
}
] | 2009-09-02 | [
[
"Alic",
"Daniela",
""
],
[
"Bona",
"Carles",
""
],
[
"Bona-Casas",
"Carles",
""
]
] | The gauge polyvalence of a new numerical code is tested, both in harmonic-coordinate simulations (gauge-waves testbed) and in singularity-avoiding coordinates (simple Black-Hole simulations, either with or without shift). The code is built upon an adjusted first-order flux-conservative version of the Z4 formalism and a... |
1208.3303 | Keiichi Akama | Keiichi Akama, Takashi Hattori, Hisamitsu Mukaida | Essential on-Brane Equations for the Braneworld Gravity under the
Schwarzschild Ansatz | 5 pages, no figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is argued that the braneworld gravity under the Schwarzschild ansatz
should obey three essential equations on the brane, and they are solved
exactly. We express the general solution of the fundamental equations of the
braneworld in power series of the brane normal coordinate. The power series are
derived by solvin... | [
{
"created": "Thu, 16 Aug 2012 07:18:56 GMT",
"version": "v1"
}
] | 2012-08-17 | [
[
"Akama",
"Keiichi",
""
],
[
"Hattori",
"Takashi",
""
],
[
"Mukaida",
"Hisamitsu",
""
]
] | It is argued that the braneworld gravity under the Schwarzschild ansatz should obey three essential equations on the brane, and they are solved exactly. We express the general solution of the fundamental equations of the braneworld in power series of the brane normal coordinate. The power series are derived by solving ... |
1406.5576 | Hongwei Yu | Yao Jin, Jiawei Hu and Hongwei Yu | Dynamical behavior and geometric phase for a circularly accelerated
two-level atom | 14 pages, two figures | Physical Review A 89, 064101 (2014) | 10.1103/PhysRevA.89.064101 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study, in the framework of open quantum systems, the time evolution of a
circularly accelerated two-level atom coupled in the multipolar scheme to a
bath of fluctuating vacuum electromagnetic fields. We find that both the
spontaneous transition rates and the geometric phase for a circularly
accelerated atom do not... | [
{
"created": "Sat, 21 Jun 2014 04:19:47 GMT",
"version": "v1"
}
] | 2014-07-01 | [
[
"Jin",
"Yao",
""
],
[
"Hu",
"Jiawei",
""
],
[
"Yu",
"Hongwei",
""
]
] | We study, in the framework of open quantum systems, the time evolution of a circularly accelerated two-level atom coupled in the multipolar scheme to a bath of fluctuating vacuum electromagnetic fields. We find that both the spontaneous transition rates and the geometric phase for a circularly accelerated atom do not e... |
2004.07522 | Valery Zhdanov | A.N. Alexandrov, V.M. Sliusar, V.I. Zhdanov | Verification of Einstein's formula for gravitational deflection of light
using observations of Galactic microlensing | 12 pages, 1 figure | Kinemat. fiz. nebesnyh tel (Online) 2020, 36(5):3-14 | 10.15407/kfnt2020.05.003 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The potential of the gravitational microlensing inside our Galaxy for testing
the Einstein formula for the gravitational light deflection is discussed. For
this purpose, the lens mapping is modified by introducing parameter eps, which
characterizes the deviation from this formula. An example of such deviation
describ... | [
{
"created": "Thu, 16 Apr 2020 08:33:03 GMT",
"version": "v1"
}
] | 2020-12-22 | [
[
"Alexandrov",
"A. N.",
""
],
[
"Sliusar",
"V. M.",
""
],
[
"Zhdanov",
"V. I.",
""
]
] | The potential of the gravitational microlensing inside our Galaxy for testing the Einstein formula for the gravitational light deflection is discussed. For this purpose, the lens mapping is modified by introducing parameter eps, which characterizes the deviation from this formula. An example of such deviation described... |
gr-qc/9905050 | Fran Filho | Fran De Aquino (Maranhao State University, Brazil) | Experimental Test for Kinetic Quantum Gravity Theory | 11 pages,PDF | null | null | null | gr-qc | null | A experimental test based on the inverse Compton effect (photon-electron
collision) is proposed to check the Kinetic Quantum Gravity Theory. The
experimental set-up point out a possible propulsionsystem, based on gravity
control.
| [
{
"created": "Fri, 14 May 1999 23:49:26 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Apr 2003 01:00:04 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"De Aquino",
"Fran",
"",
"Maranhao State University, Brazil"
]
] | A experimental test based on the inverse Compton effect (photon-electron collision) is proposed to check the Kinetic Quantum Gravity Theory. The experimental set-up point out a possible propulsionsystem, based on gravity control. |
2110.06024 | Quentin Baghi | Quentin Baghi, John Baker, Jacob Slutsky, James Ira Thorpe | Model-independent time-delay interferometry based on principal component
analysis | 13 pages, 7 figures, minor text additions with respect to previous
version | Phys. Rev. D 104, 122001 (2021) | 10.1103/PhysRevD.104.122001 | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | With a laser interferometric gravitational-wave detector in separate free
flying spacecraft, the only way to achieve detection is to mitigate the
dominant noise arising from the frequency fluctuations of the lasers via
postprocessing. The noise can be effectively filtered out on the ground through
a specific techniqu... | [
{
"created": "Tue, 12 Oct 2021 14:14:42 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Apr 2022 07:39:16 GMT",
"version": "v2"
}
] | 2022-04-27 | [
[
"Baghi",
"Quentin",
""
],
[
"Baker",
"John",
""
],
[
"Slutsky",
"Jacob",
""
],
[
"Thorpe",
"James Ira",
""
]
] | With a laser interferometric gravitational-wave detector in separate free flying spacecraft, the only way to achieve detection is to mitigate the dominant noise arising from the frequency fluctuations of the lasers via postprocessing. The noise can be effectively filtered out on the ground through a specific technique ... |
gr-qc/0210053 | Guido Pizzella | P. Astone, D. Babusci, M. Bassan, P. Bonifazi, P. Carelli, G.
Cavallari, E. Coccia, C. Cosmelli, S.D'Antonio, V. Fafone, G.Federici,
S.Frasca, G. Giordano, A. Marini, Y. Minenkov, I. Modena, G. Modestino, A.
Moleti, G. V. Pallottino, G. Pizzella, L.Quintieri, A.Rocchi, F. Ronga, R.
Terenzi, G.Torrioli, M. Visco | Study of the coincidences between the gravitational wave detectors
EXPLORER and NAUTILUS in 2001 | null | Class.Quant.Grav.19:5449-5463,2002 | 10.1088/0264-9381/19/21/310 | null | gr-qc astro-ph hep-ex hep-ph | null | We report the result from a search for bursts of gravitational waves using
data collected by the cryogenic resonant detectors EXPLORER and NAUTILUS during
the year 2001, for a total measuring time of 90 days. With these data we
repeated the coincidence search performed on the 1998 data (which showed a
small coinciden... | [
{
"created": "Thu, 17 Oct 2002 08:52:59 GMT",
"version": "v1"
}
] | 2011-08-17 | [
[
"Astone",
"P.",
""
],
[
"Babusci",
"D.",
""
],
[
"Bassan",
"M.",
""
],
[
"Bonifazi",
"P.",
""
],
[
"Carelli",
"P.",
""
],
[
"Cavallari",
"G.",
""
],
[
"Coccia",
"E.",
""
],
[
"Cosmelli",
"C.",
... | We report the result from a search for bursts of gravitational waves using data collected by the cryogenic resonant detectors EXPLORER and NAUTILUS during the year 2001, for a total measuring time of 90 days. With these data we repeated the coincidence search performed on the 1998 data (which showed a small coincidence... |
gr-qc/0102024 | Nobuyuki Sakai | Nobuyuki Sakai (Yamagata U.), John D. Barrow (U. of Cambridge) | Cosmological Evolution of Black Holes in Brans-Dicke Gravity | 6 pages, no figure, discussions modified, to appear in Class. Quantum
Grav | Class.Quant.Grav.18:4717-4724,2001 | 10.1088/0264-9381/18/22/301 | null | gr-qc astro-ph hep-ph | null | We consider a modified ``Swiss cheese'' model in Brans-Dicke theory, and use
it to discuss the evolution of black holes in an expanding universe. We define
the black hole radius by the Misner-Sharp mass and find their exact time
evolutions for dust and vacuum universes of all curvatures.
| [
{
"created": "Tue, 6 Feb 2001 15:26:12 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Sep 2001 04:48:32 GMT",
"version": "v2"
}
] | 2010-05-12 | [
[
"Sakai",
"Nobuyuki",
"",
"Yamagata U."
],
[
"Barrow",
"John D.",
"",
"U. of Cambridge"
]
] | We consider a modified ``Swiss cheese'' model in Brans-Dicke theory, and use it to discuss the evolution of black holes in an expanding universe. We define the black hole radius by the Misner-Sharp mass and find their exact time evolutions for dust and vacuum universes of all curvatures. |
1901.03354 | Maribel Hern\'andez M\'arquez | Maribel Hern\'andez M\'arquez, Tonatiuh Matos Chassin, Petra
Wiederhold | Cosmic acceleration from topological considerations II: Fiber bundles | 20 pages, 3 figures | null | 10.1088/1361-6382/ab533f | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study an alternative topological model for explaining the
observed acceleration of space-time, we answer the question of whether this
acceleration could be a consequence of the topology of the universe. For doing
that, we propose that the whole universe is composed of a four dimensional base
space, wh... | [
{
"created": "Thu, 10 Jan 2019 19:40:27 GMT",
"version": "v1"
}
] | 2022-11-08 | [
[
"Márquez",
"Maribel Hernández",
""
],
[
"Chassin",
"Tonatiuh Matos",
""
],
[
"Wiederhold",
"Petra",
""
]
] | In this work we study an alternative topological model for explaining the observed acceleration of space-time, we answer the question of whether this acceleration could be a consequence of the topology of the universe. For doing that, we propose that the whole universe is composed of a four dimensional base space, whic... |
gr-qc/0501092 | David Brown | David Brown | Conformal invariance and the conformal-traceless decomposition of the
gravitational field | 13 pages, revtex4. Version 2 contains minor corrections. Version 2
will be published in PRD | Phys.Rev. D71 (2005) 104011 | 10.1103/PhysRevD.71.104011 | null | gr-qc | null | Einstein's theory of general relativity is written in terms of the variables
obtained from a conformal--traceless decomposition of the spatial metric and
extrinsic curvature. The determinant of the conformal metric is not restricted,
so the action functional and equations of motion are invariant under conformal
trans... | [
{
"created": "Fri, 28 Jan 2005 16:07:32 GMT",
"version": "v1"
},
{
"created": "Thu, 5 May 2005 17:34:24 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Brown",
"David",
""
]
] | Einstein's theory of general relativity is written in terms of the variables obtained from a conformal--traceless decomposition of the spatial metric and extrinsic curvature. The determinant of the conformal metric is not restricted, so the action functional and equations of motion are invariant under conformal transfo... |
1709.06426 | \"Ozg\"ur \"Okc\"u | \"Ozg\"ur \"Okc\"u, Ekrem Ayd{\i}ner | Joule-Thomson Expansion of Kerr-AdS Black Holes | 10 pages, 3 figures. Minor revisions | Eur. Phys. J. C (2018) 78: 123 | 10.1140/epjc/s10052-018-5602-x | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we study Joule-Thomson expansion for Kerr-AdS black holes in
the extended phase space. Joule-Thomson expansion formula of Kerr-AdS black
holes is derived. We investigate both isenthalpic and numerical inversion
curves in the T-P plane and demonstrate the cooling-heating regions for
Kerr-AdS black holes... | [
{
"created": "Sat, 16 Sep 2017 22:41:22 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Dec 2017 22:50:11 GMT",
"version": "v2"
},
{
"created": "Sat, 19 May 2018 07:16:23 GMT",
"version": "v3"
}
] | 2018-05-22 | [
[
"Ökcü",
"Özgür",
""
],
[
"Aydıner",
"Ekrem",
""
]
] | In this paper, we study Joule-Thomson expansion for Kerr-AdS black holes in the extended phase space. Joule-Thomson expansion formula of Kerr-AdS black holes is derived. We investigate both isenthalpic and numerical inversion curves in the T-P plane and demonstrate the cooling-heating regions for Kerr-AdS black holes. ... |
gr-qc/9712025 | Dr Spiros Cotsakis | S. Cotsakis (1), J. Miritzis (1) and L. Querella (2) ((1) Department
of Mathematics, University of the Aegean, (2) Institut d'astrophysique et de
geophysique, Universite de Liege) | Variational and conformal structure of nonlinear metric-connection
gravitational lagrangians | 8 pages, LaTeX (REVTeX 3.1), submitted to J. Math. Phys., references
added (nothing changed but LaTeX style) | J.Math.Phys. 40 (1999) 3063-3071 | 10.1063/1.532744 | null | gr-qc | null | We examine the variational and conformal structures of higher order theories
of gravity which are derived from a metric-connection Lagrangian that is an
arbitrary function of the curvature invariants. We show that the constrained
first order formalism when applied to these theories may lead consistently to a
new meth... | [
{
"created": "Thu, 4 Dec 1997 11:31:29 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Nov 1998 12:56:51 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Cotsakis",
"S.",
""
],
[
"Miritzis",
"J.",
""
],
[
"Querella",
"L.",
""
]
] | We examine the variational and conformal structures of higher order theories of gravity which are derived from a metric-connection Lagrangian that is an arbitrary function of the curvature invariants. We show that the constrained first order formalism when applied to these theories may lead consistently to a new method... |
2109.11325 | Jan Zaanen | Jan Zaanen, Floris Balm and Aron J. Beekman | Crystal gravity | 64 pages, 22 figures. The introduction has been revised compared to
the first version | SciPost Phys. 13, 039 (2022) | 10.21468/SciPostPhys.13.2.039 | null | gr-qc cond-mat.soft hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We address a subject that could have been analyzed century ago: how does the
universe of general relativity look like when it would have been filled with
solid matter? Solids break spontaneously the translations and rotations of
space itself. Only rather recently it was realized in various context that the
order para... | [
{
"created": "Thu, 23 Sep 2021 12:19:53 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Apr 2022 10:40:57 GMT",
"version": "v2"
}
] | 2022-08-31 | [
[
"Zaanen",
"Jan",
""
],
[
"Balm",
"Floris",
""
],
[
"Beekman",
"Aron J.",
""
]
] | We address a subject that could have been analyzed century ago: how does the universe of general relativity look like when it would have been filled with solid matter? Solids break spontaneously the translations and rotations of space itself. Only rather recently it was realized in various context that the order parame... |
1602.06252 | Shamaila Rani | Abdul Jawad, Shamaila Rani, Davood Momeni, Faiza Gulshan, Ratbay
Myrzakulov | First and Second Laws of Thermodynamics in Modified Ho\v{r}ava-Lifshitz
$F(R)$ Gravity | 20 pages. arXiv admin note: text overlap with arXiv:1109.1694 by
other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we discuss the thermodynamics of the apparent horizon in $F(R)$
Ho\v{r}ava-Lifshitz gravity in equilibrium and non-equilibrium ensembles. We
show that the second law of thermodynamics can be satisfied in this non
relativistic theory.
| [
{
"created": "Tue, 16 Feb 2016 12:01:07 GMT",
"version": "v1"
}
] | 2016-02-22 | [
[
"Jawad",
"Abdul",
""
],
[
"Rani",
"Shamaila",
""
],
[
"Momeni",
"Davood",
""
],
[
"Gulshan",
"Faiza",
""
],
[
"Myrzakulov",
"Ratbay",
""
]
] | In this paper we discuss the thermodynamics of the apparent horizon in $F(R)$ Ho\v{r}ava-Lifshitz gravity in equilibrium and non-equilibrium ensembles. We show that the second law of thermodynamics can be satisfied in this non relativistic theory. |
0908.0661 | M. Hossein Dehghani | N. Bostani, M. H. Dehghani | Topological Black Holes of (n+1)-dimensional Einstein-Yang-Mills Gravity | 14 pages, 2 figures, accepted by Mod. Phys. Lett. A | Mod.Phys.Lett.A25:1507-1519,2010 | 10.1142/S0217732310032809 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the topological solutions of Einstein gravity in the presence of a
non-Abelian Yang-Mills field. In ($n+1$) dimensions, we consider the
$So(n(n-1)/2-1,1)$ semisimple group as the Yang-Mills gauge group, and
introduce the black hole solutions with hyperbolic horizon. We argue that the
4-dimensional solution... | [
{
"created": "Wed, 5 Aug 2009 12:49:31 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Jan 2010 15:11:12 GMT",
"version": "v2"
},
{
"created": "Thu, 13 May 2010 18:03:17 GMT",
"version": "v3"
}
] | 2014-11-20 | [
[
"Bostani",
"N.",
""
],
[
"Dehghani",
"M. H.",
""
]
] | We present the topological solutions of Einstein gravity in the presence of a non-Abelian Yang-Mills field. In ($n+1$) dimensions, we consider the $So(n(n-1)/2-1,1)$ semisimple group as the Yang-Mills gauge group, and introduce the black hole solutions with hyperbolic horizon. We argue that the 4-dimensional solution i... |
1005.2377 | Marcello Ortaggio | Marcello Ortaggio, Vojtech Pravda, Alena Pravdova | Type III and N Einstein spacetimes in higher dimensions: general
properties | 19 pages | Phys.Rev.D82:064043,2010 | 10.1103/PhysRevD.82.064043 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Sachs equations governing the evolution of the optical matrix of geodetic
WANDs (Weyl aligned null directions) are explicitly solved in n-dimensions in
several cases which are of interest in potential applications. This is then
used to study Einstein spacetimes of type III and N in the higher dimensional
Newman-P... | [
{
"created": "Thu, 13 May 2010 17:10:18 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Ortaggio",
"Marcello",
""
],
[
"Pravda",
"Vojtech",
""
],
[
"Pravdova",
"Alena",
""
]
] | The Sachs equations governing the evolution of the optical matrix of geodetic WANDs (Weyl aligned null directions) are explicitly solved in n-dimensions in several cases which are of interest in potential applications. This is then used to study Einstein spacetimes of type III and N in the higher dimensional Newman-Pen... |
gr-qc/0511076 | Timothy Clifton | T. Clifton and John D. Barrow | The Existence of Godel, Einstein and de Sitter Universes | 8 pages, no figures | Phys.Rev. D72 (2005) 123003 | 10.1103/PhysRevD.72.123003 | null | gr-qc astro-ph hep-ph | null | We determine the general conditions for the existence of Godel, Einstein
static, and de Sitter universes in gravity theories derived from a Lagrangian
that is an arbitrary function of the scalar curvature and Ricci and Riemann
curvature invariants. Explicit expressions for the solutions are found in terms
of the para... | [
{
"created": "Mon, 14 Nov 2005 18:13:41 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Nov 2005 20:05:31 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Feb 2006 18:35:52 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Clifton",
"T.",
""
],
[
"Barrow",
"John D.",
""
]
] | We determine the general conditions for the existence of Godel, Einstein static, and de Sitter universes in gravity theories derived from a Lagrangian that is an arbitrary function of the scalar curvature and Ricci and Riemann curvature invariants. Explicit expressions for the solutions are found in terms of the parame... |
1708.03677 | Vihan Patel | Vihan M. Patel and and Charles H. Lineweaver | Solutions to the Cosmic Initial Entropy Problem without Equilibrium
Initial Conditions | 10 pages, 5 figures | null | 10.3390/e19080411 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The entropy of the observable universe is increasing. Thus, at earlier times
the entropy was lower. However, the cosmic microwave background radiation
reveals an apparently high entropy universe close to thermal and chemical
equilibrium. A two-part solution to this cosmic initial entropy problem is
proposed. Followin... | [
{
"created": "Thu, 10 Aug 2017 12:51:04 GMT",
"version": "v1"
}
] | 2017-10-11 | [
[
"Patel",
"Vihan M.",
""
],
[
"Lineweaver",
"and Charles H.",
""
]
] | The entropy of the observable universe is increasing. Thus, at earlier times the entropy was lower. However, the cosmic microwave background radiation reveals an apparently high entropy universe close to thermal and chemical equilibrium. A two-part solution to this cosmic initial entropy problem is proposed. Following ... |
1306.6527 | Claes Uggla | Claes Uggla | Spacetime Singularities: Recent Developments | 21 pages, 7 figures (16 PDF figure files), plenary contribution to
the Proceedings of the Thirteenth Marcel Grossmann Meeting | International Journal of Modern Physics D, Volume 22, Issue 03,
March 2013, 1330002-1330023 (2013) | 10.1142/S0218271813300024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent developments concerning oscillatory spacelike singularities in general
relativity are taking place on two fronts. The first treats generic
singularities in spatially homogeneous cosmology, most notably Bianchi types
VIII and IX. The second deals with generic oscillatory singularities in
inhomogeneous cosmologi... | [
{
"created": "Thu, 27 Jun 2013 14:51:57 GMT",
"version": "v1"
}
] | 2013-06-28 | [
[
"Uggla",
"Claes",
""
]
] | Recent developments concerning oscillatory spacelike singularities in general relativity are taking place on two fronts. The first treats generic singularities in spatially homogeneous cosmology, most notably Bianchi types VIII and IX. The second deals with generic oscillatory singularities in inhomogeneous cosmologies... |
1805.00470 | Eric Linder | Stephen Appleby, Eric V. Linder | The Well-Tempered Cosmological Constant | 19 pages, 4 figures | JCAP 1807, 034 (2018) | 10.1088/1475-7516/2018/07/034 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Self tuning is one of the few methods for dynamically cancelling a large
cosmological constant and yet giving an accelerating universe. Its drawback is
that it tends to screen all sources of energy density, including matter. We
develop a model that tempers the self tuning so the dynamical scalar field
still cancels a... | [
{
"created": "Tue, 1 May 2018 03:02:00 GMT",
"version": "v1"
}
] | 2018-08-01 | [
[
"Appleby",
"Stephen",
""
],
[
"Linder",
"Eric V.",
""
]
] | Self tuning is one of the few methods for dynamically cancelling a large cosmological constant and yet giving an accelerating universe. Its drawback is that it tends to screen all sources of energy density, including matter. We develop a model that tempers the self tuning so the dynamical scalar field still cancels an ... |
1705.05906 | Kirill Bronnikov | K.A. Bronnikov and P.A. Korolyov | On wormholes with long throats and the stability problem | 8 pages, 2 figures. 2 references and a comment added | Grav. Cosmol. 23, 273 (2017) | 10.1134/S0202289317030021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct explicit examples of globally regular static, spherically
symmetric solutions of general relativity with a phantom scalar field as the
source of gravity, describing traversable wormholes with flat asymptotic
regions on both sides of the throat as well as regular black holes, in
particular, those called b... | [
{
"created": "Tue, 16 May 2017 20:39:41 GMT",
"version": "v1"
},
{
"created": "Sat, 27 May 2017 19:35:49 GMT",
"version": "v2"
}
] | 2017-09-19 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Korolyov",
"P. A.",
""
]
] | We construct explicit examples of globally regular static, spherically symmetric solutions of general relativity with a phantom scalar field as the source of gravity, describing traversable wormholes with flat asymptotic regions on both sides of the throat as well as regular black holes, in particular, those called bla... |
2009.08556 | Iarley P. Lobo Dr | I. P. Lobo and G. B. Santos | Thermal dimensional reduction and black hole evaporation | 6 pages, 2 figures. Updated to match published version | null | 10.1016/j.physletb.2021.136272 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze how a quantum-gravity-induced change in the number of thermal
dimensions (through a modified dispersion relation) affects the geometry and
the thermodynamics of a charged black hole. To that end we resort to Kiselev's
solution as the impact such modifications have on the evaporation rate of the
black hole ... | [
{
"created": "Thu, 17 Sep 2020 23:22:41 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Apr 2021 19:37:52 GMT",
"version": "v2"
}
] | 2021-04-16 | [
[
"Lobo",
"I. P.",
""
],
[
"Santos",
"G. B.",
""
]
] | We analyze how a quantum-gravity-induced change in the number of thermal dimensions (through a modified dispersion relation) affects the geometry and the thermodynamics of a charged black hole. To that end we resort to Kiselev's solution as the impact such modifications have on the evaporation rate of the black hole be... |
1104.1887 | Sebastian Saneesh | Saneesh Sebastian and V. C. Kuriakose | A Mond Programme from Einstein Hilbert Action | 5 pages | null | null | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the usual derivation of Einstein's equation from action, the surface terms
are neglected. Hawking \cite{hw} gave a derivation of the gravitational
Hamiltonian keeping all surface terms. Using such surface terms Easson
et.al.\cite{ea} showed that Friedmann equation could get modified and using the
modified Friedman... | [
{
"created": "Mon, 11 Apr 2011 09:15:18 GMT",
"version": "v1"
}
] | 2011-04-12 | [
[
"Sebastian",
"Saneesh",
""
],
[
"Kuriakose",
"V. C.",
""
]
] | In the usual derivation of Einstein's equation from action, the surface terms are neglected. Hawking \cite{hw} gave a derivation of the gravitational Hamiltonian keeping all surface terms. Using such surface terms Easson et.al.\cite{ea} showed that Friedmann equation could get modified and using the modified Friedmann ... |
gr-qc/0510083 | Matt Visser | Alex B. Nielsen (University of Canterbury), Matt Visser (Victoria
University of Wellington) | Production and decay of evolving horizons | 25 pages, uses iopart.cls V2: 5 references added; minor typos; V3:
some additional clarifications, additional references, additional appendix on
the Viadya spacetime. This version published in Classical and Quiantum
Gravity | Class.Quant.Grav. 23 (2006) 4637-4658 | 10.1088/0264-9381/23/14/006 | null | gr-qc | null | We consider a simple physical model for an evolving horizon that is strongly
interacting with its environment, exchanging arbitrarily large quantities of
matter with its environment in the form of both infalling material and outgoing
Hawking radiation. We permit fluxes of both lightlike and timelike particles to
cros... | [
{
"created": "Tue, 18 Oct 2005 03:10:58 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Oct 2005 08:58:10 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Jun 2006 02:09:48 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Nielsen",
"Alex B.",
"",
"University of Canterbury"
],
[
"Visser",
"Matt",
"",
"Victoria\n University of Wellington"
]
] | We consider a simple physical model for an evolving horizon that is strongly interacting with its environment, exchanging arbitrarily large quantities of matter with its environment in the form of both infalling material and outgoing Hawking radiation. We permit fluxes of both lightlike and timelike particles to cross ... |
2101.10851 | Dr. Sudhaker Upadhyay | Behnam Pourhassan, Hoda Farahani and Sudhaker Upadhyay | Sound Speed in Extended Chaplygin Fluid | 14 pages, 10 figures, Published in New Astronomy | New Astronomy 86 (2021) 101569 | 10.1016/j.newast.2021.101569 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider an extended Chaplygin gas equation of state which is driven from
D-brane action and construct a cosmological model based on this equation of
state. In this regard, we compute the scale factor of the model under a certain
approximation. The conservation equation of this case is a non-linear
differential eq... | [
{
"created": "Sun, 24 Jan 2021 16:41:23 GMT",
"version": "v1"
}
] | 2021-02-03 | [
[
"Pourhassan",
"Behnam",
""
],
[
"Farahani",
"Hoda",
""
],
[
"Upadhyay",
"Sudhaker",
""
]
] | We consider an extended Chaplygin gas equation of state which is driven from D-brane action and construct a cosmological model based on this equation of state. In this regard, we compute the scale factor of the model under a certain approximation. The conservation equation of this case is a non-linear differential equa... |
1809.05179 | David Hobill | Andrew Masterson and David Hobill | Critical Parameterisation of the Brill Wave Initial Value Problem | 8 pages, 8 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A numerical framework to explore the Brill Wave Initial Value Problem is
presented along with a review of some of the theoretical predictions concerning
Brill waves. It is demonstrated that there is an agreement between the
numerically observed phenomena and theory, namely that the IVP parameterisation
of the metric ... | [
{
"created": "Thu, 13 Sep 2018 21:19:49 GMT",
"version": "v1"
}
] | 2018-09-17 | [
[
"Masterson",
"Andrew",
""
],
[
"Hobill",
"David",
""
]
] | A numerical framework to explore the Brill Wave Initial Value Problem is presented along with a review of some of the theoretical predictions concerning Brill waves. It is demonstrated that there is an agreement between the numerically observed phenomena and theory, namely that the IVP parameterisation of the metric fu... |
gr-qc/0606015 | Joan Josep Ferrando | Joan Josep Ferrando Juan Antonio S\'aez | On the space-times admitting two shear-free geodesic null congruences | 18 pages; v2: minor changes | Gen.Rel.Grav.39:343-359,2007 | 10.1007/s10714-006-0388-9 | null | gr-qc | null | We analyze the space-times admitting two shear-free geodesic null
congruences. The integrability conditions are presented in a plain tensorial
way as equations on the volume element $U$ of the time-like 2--plane that these
directions define. From these we easily deduce significant consequences. We
obtain explicit exp... | [
{
"created": "Fri, 2 Jun 2006 14:46:49 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Feb 2007 10:48:47 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Sáez",
"Joan Josep Ferrando Juan Antonio",
""
]
] | We analyze the space-times admitting two shear-free geodesic null congruences. The integrability conditions are presented in a plain tensorial way as equations on the volume element $U$ of the time-like 2--plane that these directions define. From these we easily deduce significant consequences. We obtain explicit expre... |
1210.4628 | Kei Yamada | Hiroki Okawara, Kei Yamada, Hideki Asada | Possible daily and seasonal variations in quantum interference induced
by Chern-Simons gravity | 12 pages, 3 figures; accepted by PRL | Phys.Rev.Lett.109:231101,2012 | 10.1103/PhysRevLett.109.231101 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Possible effects of Chern-Simons (CS) gravity on a quantum interferometer
turn out to be dependent on the latitude and direction of the interferometer on
the Earth in orbital motion around the Sun. Daily and seasonal variations in
phase shifts are predicted with an estimate of the size of the effects,
wherefore neutr... | [
{
"created": "Wed, 17 Oct 2012 05:17:31 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Okawara",
"Hiroki",
""
],
[
"Yamada",
"Kei",
""
],
[
"Asada",
"Hideki",
""
]
] | Possible effects of Chern-Simons (CS) gravity on a quantum interferometer turn out to be dependent on the latitude and direction of the interferometer on the Earth in orbital motion around the Sun. Daily and seasonal variations in phase shifts are predicted with an estimate of the size of the effects, wherefore neutron... |
1606.04444 | Thibaut Josset | Goffredo Chirco, Thibaut Josset | Statistical mechanics of covariant systems with multi-fingered time | 5 pages, 2 figures | Found Phys 51, 3 (2021) | 10.1007/s10701-021-00406-3 | null | gr-qc cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, in [Class. Quantum Grav. 33 (2016) 045005], the authors proposed a
new approach extending the framework of statistical mechanics to
reparametrization-invariant systems with no additional gauges. In this work,
the approach is generalized to systems defined by more than one Hamiltonian
constraints (multi-fing... | [
{
"created": "Tue, 14 Jun 2016 16:32:00 GMT",
"version": "v1"
}
] | 2022-10-04 | [
[
"Chirco",
"Goffredo",
""
],
[
"Josset",
"Thibaut",
""
]
] | Recently, in [Class. Quantum Grav. 33 (2016) 045005], the authors proposed a new approach extending the framework of statistical mechanics to reparametrization-invariant systems with no additional gauges. In this work, the approach is generalized to systems defined by more than one Hamiltonian constraints (multi-finger... |
gr-qc/9910116 | Thomas A. Moore | Thomas A. Moore, Ronald W. Hellings | The Angular Resolution of Space-Based Gravitational Wave Detectors | 13 pages, 6 figures, submitted to Phys Rev D. The current version
corrects an error in our original paper and adds some clarifying language.
The error also required correction of the graphs now shown in Figures 3
through 6 | Phys.Rev. D65 (2002) 062001 | 10.1103/PhysRevD.65.062001 | null | gr-qc | null | Proposed space-based gravitational wave antennas involve satellites arrayed
either in an equilateral triangle around the earth in the ecliptic plane (the
ecliptic-plane option) or in an equilateral triangle orbiting the sun in such a
way that the plane of the triangle is tilted at 60 degrees relative to the
ecliptic ... | [
{
"created": "Mon, 1 Nov 1999 23:54:55 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Jun 2000 00:06:39 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Moore",
"Thomas A.",
""
],
[
"Hellings",
"Ronald W.",
""
]
] | Proposed space-based gravitational wave antennas involve satellites arrayed either in an equilateral triangle around the earth in the ecliptic plane (the ecliptic-plane option) or in an equilateral triangle orbiting the sun in such a way that the plane of the triangle is tilted at 60 degrees relative to the ecliptic (t... |
gr-qc/0404116 | Gerold Betschart | Gerold Betschart (Cape Town) and Chris A. Clarkson (Cape Town & ICG,
Portsmouth) | Scalar field and electromagnetic perturbations on Locally Rotationally
Symmetric spacetimes | 22 pages; v3 has minor changes to match published version | Class.Quant.Grav.21:5587-5608,2004 | 10.1088/0264-9381/21/23/018 | null | gr-qc | null | We study scalar field and electromagnetic perturbations on Locally
Rotationally Symmetric (LRS) class II spacetimes, exploiting a recently
developed covariant and gauge-invariant perturbation formalism. From the
Klein-Gordon equation and Maxwell's equations, respectively, we derive
covariant and gauge-invariant wave ... | [
{
"created": "Wed, 28 Apr 2004 17:21:00 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Sep 2004 17:23:54 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Nov 2004 12:21:29 GMT",
"version": "v3"
}
] | 2010-11-19 | [
[
"Betschart",
"Gerold",
"",
"Cape Town"
],
[
"Clarkson",
"Chris A.",
"",
"Cape Town & ICG,\n Portsmouth"
]
] | We study scalar field and electromagnetic perturbations on Locally Rotationally Symmetric (LRS) class II spacetimes, exploiting a recently developed covariant and gauge-invariant perturbation formalism. From the Klein-Gordon equation and Maxwell's equations, respectively, we derive covariant and gauge-invariant wave eq... |
1507.02512 | Fatimah Shojai | F. Shojai, A. Shojai, M. Sanati | Regularizing future cosmological singularities with varying speed of
light | null | Eur. Phys. J. C (2015) 75:568 | 10.1140/epjc/s10052-015-3796-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmological models may result in future singularities. We show that, in the
framework of dynamical varying speed of light theories, it is possible to
regularize those singularities.
| [
{
"created": "Thu, 9 Jul 2015 14:09:43 GMT",
"version": "v1"
}
] | 2016-01-20 | [
[
"Shojai",
"F.",
""
],
[
"Shojai",
"A.",
""
],
[
"Sanati",
"M.",
""
]
] | Cosmological models may result in future singularities. We show that, in the framework of dynamical varying speed of light theories, it is possible to regularize those singularities. |
1603.08411 | Xiaobo Gong | Xiaobo Gong, Yi Liao, Zhaoyi Xu | A mathematical form of force-free magnetosphere equation around Kerr
black holes and its application to Meissner effect | null | null | 10.1016/j.physletb.2016.06.047 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on the Lagrangian of the steady axisymmetric force-free magnetosphere
(FFM) equation around Kerr black holes(KBHs), we find that the FFM equation can
be rewritten in a new form as $f_{,rr} / (1-\mu^{2}) + f_{,\mu\mu} / \Delta +
K(f(r,\mu),r,\mu) = 0$, where $\mu = -\cos\theta$. By coordinate
transformation, the... | [
{
"created": "Mon, 28 Mar 2016 15:50:36 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Mar 2016 09:16:01 GMT",
"version": "v2"
},
{
"created": "Thu, 19 May 2016 07:16:56 GMT",
"version": "v3"
}
] | 2016-08-03 | [
[
"Gong",
"Xiaobo",
""
],
[
"Liao",
"Yi",
""
],
[
"Xu",
"Zhaoyi",
""
]
] | Based on the Lagrangian of the steady axisymmetric force-free magnetosphere (FFM) equation around Kerr black holes(KBHs), we find that the FFM equation can be rewritten in a new form as $f_{,rr} / (1-\mu^{2}) + f_{,\mu\mu} / \Delta + K(f(r,\mu),r,\mu) = 0$, where $\mu = -\cos\theta$. By coordinate transformation, the f... |
1512.02876 | Guillaume Faye | Laura Bernard, Luc Blanchet, Alejandro Boh\'e, Guillaume Faye, Sylvain
Marsat | Fokker action of non-spinning compact binaries at the fourth
post-Newtonian approximation | 47 pages; references added; Sec. VD enhanced; a few more minor
improvements | Phys. Rev. D 93, 084037 (2016) | 10.1103/PhysRevD.93.084037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Fokker action governing the motion of compact binary systems without
spins is derived in harmonic coordinates at the fourth post-Newtonian
approximation (4PN) of general relativity. Dimensional regularization is used
for treating the local ultraviolet (UV) divergences associated with point
particles, followed by ... | [
{
"created": "Wed, 9 Dec 2015 14:34:20 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Dec 2015 19:46:37 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Apr 2016 19:59:36 GMT",
"version": "v3"
}
] | 2016-04-26 | [
[
"Bernard",
"Laura",
""
],
[
"Blanchet",
"Luc",
""
],
[
"Bohé",
"Alejandro",
""
],
[
"Faye",
"Guillaume",
""
],
[
"Marsat",
"Sylvain",
""
]
] | The Fokker action governing the motion of compact binary systems without spins is derived in harmonic coordinates at the fourth post-Newtonian approximation (4PN) of general relativity. Dimensional regularization is used for treating the local ultraviolet (UV) divergences associated with point particles, followed by a ... |
2103.06306 | Lorenzo Speri | Lorenzo Speri and Jonathan R. Gair | Assessing the impact of transient orbital resonances | 16 pages, 6 figures | Phys. Rev. D 103, 124032 (2021) | 10.1103/PhysRevD.103.124032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the primary sources for the future space-based gravitational wave
detector, the Laser Interferometer Space Antenna, are the inspirals of small
compact objects into massive black holes in the centres of galaxies. The
gravitational waveforms from such Extreme Mass Ratio Inspiral (EMRI) systems
will provide measu... | [
{
"created": "Wed, 10 Mar 2021 19:15:55 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jun 2021 08:11:44 GMT",
"version": "v2"
}
] | 2021-06-16 | [
[
"Speri",
"Lorenzo",
""
],
[
"Gair",
"Jonathan R.",
""
]
] | One of the primary sources for the future space-based gravitational wave detector, the Laser Interferometer Space Antenna, are the inspirals of small compact objects into massive black holes in the centres of galaxies. The gravitational waveforms from such Extreme Mass Ratio Inspiral (EMRI) systems will provide measure... |
1212.5392 | Alessandro Fabbri | A. Fabbri | Observing Hawking radiation in Bose-Einstein condensates via correlation
measurements | 10 pages, 7 figures; talk given at SIF2012 (Naples, Italy), second
prize in the `Astroparticle physics, Astrophysics and Cosmology' section | Il Nuovo Cimento C36 (2013), 99 | 10.1393/ncc/i2013-11545-y | null | gr-qc cond-mat.quant-gas hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observing quantum particle creation by black holes (Hawking radiation) in the
astrophysical context is, in ordinary situations, hopeless. Nevertheless the
Hawking effect, which depends only on kinematical properties of wave
propagation in the presence of horizons, is present also in nongravitational
contexts, for ins... | [
{
"created": "Fri, 21 Dec 2012 10:53:02 GMT",
"version": "v1"
}
] | 2014-04-08 | [
[
"Fabbri",
"A.",
""
]
] | Observing quantum particle creation by black holes (Hawking radiation) in the astrophysical context is, in ordinary situations, hopeless. Nevertheless the Hawking effect, which depends only on kinematical properties of wave propagation in the presence of horizons, is present also in nongravitational contexts, for insta... |
2003.01097 | Isha Kotecha | Mehdi Assanioussi and Isha Kotecha | Thermal quantum gravity condensates in group field theory cosmology | v2, 16 pages, improved presentation with additional remarks in Sec.
III D, minor changes elsewhere, results unchanged, published version | Phys. Rev. D 102, 044024 (2020) | 10.1103/PhysRevD.102.044024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The condensate cosmology programme of group field theory has produced several
interesting results. The key idea is in the suggestion that a macroscopic
homogeneous spacetime can be approximated by a dynamical condensate phase of
the underlying microscopic system of an arbitrarily large number of candidate
quanta of g... | [
{
"created": "Mon, 2 Mar 2020 18:38:30 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Aug 2020 11:15:51 GMT",
"version": "v2"
}
] | 2020-08-18 | [
[
"Assanioussi",
"Mehdi",
""
],
[
"Kotecha",
"Isha",
""
]
] | The condensate cosmology programme of group field theory has produced several interesting results. The key idea is in the suggestion that a macroscopic homogeneous spacetime can be approximated by a dynamical condensate phase of the underlying microscopic system of an arbitrarily large number of candidate quanta of geo... |
2002.12178 | Ivan Kharuk | I. Kharuk | Emergent Planck mass and dark energy from affine gravity | null | null | 10.1134/S004057792110007X | INR-TH-2020-005 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a novel model of affine gravity, which implements the no-scale
scenario. Namely, Planck mass and Hubble constant emerge dynamically, through
the mechanism of spontaneous breaking of scale-invariance. Moreover, in our
model the time direction and non--degenerate metric emerge dynamically as well.
This nat... | [
{
"created": "Thu, 27 Feb 2020 15:16:45 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Jun 2021 12:29:26 GMT",
"version": "v2"
}
] | 2021-11-03 | [
[
"Kharuk",
"I.",
""
]
] | We introduce a novel model of affine gravity, which implements the no-scale scenario. Namely, Planck mass and Hubble constant emerge dynamically, through the mechanism of spontaneous breaking of scale-invariance. Moreover, in our model the time direction and non--degenerate metric emerge dynamically as well. This natur... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.