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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1908.02340 | Salvatore Capozziello | Wladimir-Georges Boskoff and Salvatore Capozziello | Recovering the cosmological constant from affine geometry | 17 pages, to appear in Int. Jou. Geom. Meth. Mod. Phys | null | 10.1142/S0219887819501615 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A gravity theory without masses can be constructed in Minkowski spaces using
a geometric Minkowski potential. The related affine spacelike spheres can be
seen as the regions of the Minkowski spacelike vectors characterized by a
constant Minkowski gravitational potential. These spheres point out, for each
dimension $n... | [
{
"created": "Tue, 6 Aug 2019 19:33:16 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Aug 2019 10:51:43 GMT",
"version": "v2"
}
] | 2019-10-23 | [
[
"Boskoff",
"Wladimir-Georges",
""
],
[
"Capozziello",
"Salvatore",
""
]
] | A gravity theory without masses can be constructed in Minkowski spaces using a geometric Minkowski potential. The related affine spacelike spheres can be seen as the regions of the Minkowski spacelike vectors characterized by a constant Minkowski gravitational potential. These spheres point out, for each dimension $n \... |
gr-qc/0501009 | Viktor Czinner | Viktor Czinner, M\'aty\'as Vas\'uth, \'Arp\'ad Luk\'acs and Zolt\'an
Perj\'es | Covariant Linear Perturbations in a Concordance Model | 8 pages | Int.J.Mod.Phys. A20 (2005) 5671-5677 | 10.1142/S0217751X05022378 | null | gr-qc astro-ph | null | We present the complete solution of the first order metric and density
perturbation equations in a spatially flat (K=0), Friedmann-Robertson-Walker
(FRW) universe filled with pressureless ideal fluid, in the presence of
cosmological constant. We use covariant linear perturbation formalism and the
comoving gauge condi... | [
{
"created": "Tue, 4 Jan 2005 18:52:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Czinner",
"Viktor",
""
],
[
"Vasúth",
"Mátyás",
""
],
[
"Lukács",
"Árpád",
""
],
[
"Perjés",
"Zoltán",
""
]
] | We present the complete solution of the first order metric and density perturbation equations in a spatially flat (K=0), Friedmann-Robertson-Walker (FRW) universe filled with pressureless ideal fluid, in the presence of cosmological constant. We use covariant linear perturbation formalism and the comoving gauge conditi... |
2110.09184 | Marco Danilo Claudio Torri | Marco Danilo Claudio Torri | Quantum gravity phenomenology induced in the propagation of UHECR, a
kinematical solution in Finsler and generalized Finsler spacetime | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well-known that the Universe is opaque to the propagation of
Ultra-High-Energy Cosmic Rays (UHECRs) since these particles dissipate energy
during their propagation interacting with the Cosmic Microwave Background (CMB)
mainly in the so-called GZK cut-off phenomenon. Some experimental evidence
seems to hint at t... | [
{
"created": "Mon, 18 Oct 2021 11:02:07 GMT",
"version": "v1"
}
] | 2021-10-19 | [
[
"Torri",
"Marco Danilo Claudio",
""
]
] | It is well-known that the Universe is opaque to the propagation of Ultra-High-Energy Cosmic Rays (UHECRs) since these particles dissipate energy during their propagation interacting with the Cosmic Microwave Background (CMB) mainly in the so-called GZK cut-off phenomenon. Some experimental evidence seems to hint at the... |
2312.17347 | Rog\'erio Capobianco | Rog\'erio Capobianco, Betti Hartmann and Jutta Kunz | Geodesic Motion in a Swirling Universe: The complete set of solutions | 16 pages, 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the geodesic motion in a space-time describing a swirling universe.
We show that the geodesic equations can be fully decoupled in the
Hamilton-Jacobi formalism leading to an additional constant of motion. The
analytical solutions to the geodesic equations can be given in terms of
elementary and elliptic func... | [
{
"created": "Thu, 28 Dec 2023 20:26:47 GMT",
"version": "v1"
}
] | 2024-01-01 | [
[
"Capobianco",
"Rogério",
""
],
[
"Hartmann",
"Betti",
""
],
[
"Kunz",
"Jutta",
""
]
] | We study the geodesic motion in a space-time describing a swirling universe. We show that the geodesic equations can be fully decoupled in the Hamilton-Jacobi formalism leading to an additional constant of motion. The analytical solutions to the geodesic equations can be given in terms of elementary and elliptic functi... |
0909.1280 | Alex Bernardini | Alex E. Bernardini, O. Bertolami | Thermodynamic equilibrium conditions for mass varying particle
structures | 12 pages, 02 figures | Phys.Lett.B684:96-100,2010; Erratum-ibid.B700:389,2011 | 10.1016/j.physletb.2010.01.007 10.1016/j.physletb.2011.04.065 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The thermodynamic equilibrium conditions for compact structures composed by
mass varying particles are discussed assuming that the so-called dynamical mass
behaves like an additional extensive thermodynamic degree of freedom. It then
follows that, such weakly interacting massive particles can form clusters of
non-bar... | [
{
"created": "Mon, 7 Sep 2009 16:45:20 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Nov 2009 02:19:51 GMT",
"version": "v2"
}
] | 2011-06-07 | [
[
"Bernardini",
"Alex E.",
""
],
[
"Bertolami",
"O.",
""
]
] | The thermodynamic equilibrium conditions for compact structures composed by mass varying particles are discussed assuming that the so-called dynamical mass behaves like an additional extensive thermodynamic degree of freedom. It then follows that, such weakly interacting massive particles can form clusters of non-baryo... |
2110.03547 | Shailesh Kumar | Subhodeep Sarkar, Shailesh Kumar, Srijit Bhattacharjee | Can we detect a supertranslated black hole? | 8 Pages, 4 Figures, text substantially modified, new results added,
to appear in Physical Review D | null | 10.1103/PhysRevD.105.084001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We attempt to address the question of whether standard tests of general
relativity can detect the presence of a black hole carrying a supertranslation
field. In this regard, we study the photon sphere of a dynamical black hole
carrying a supertranslation hair. We find that the dynamics of the photon
sphere is quite s... | [
{
"created": "Thu, 7 Oct 2021 15:15:45 GMT",
"version": "v1"
},
{
"created": "Sat, 9 Oct 2021 09:03:07 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Oct 2021 08:25:31 GMT",
"version": "v3"
},
{
"created": "Fri, 11 Mar 2022 17:37:22 GMT",
"version": "v4"
}
] | 2022-04-13 | [
[
"Sarkar",
"Subhodeep",
""
],
[
"Kumar",
"Shailesh",
""
],
[
"Bhattacharjee",
"Srijit",
""
]
] | We attempt to address the question of whether standard tests of general relativity can detect the presence of a black hole carrying a supertranslation field. In this regard, we study the photon sphere of a dynamical black hole carrying a supertranslation hair. We find that the dynamics of the photon sphere is quite sub... |
0908.4456 | Samuel Collopy | Samuel J. Collopy | Vacuum Structure of Yang-Mills Theory in Curved Spacetime | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The stability of the chromomagnetic Savvidy vacuum in QCD under the influence
of positive Riemannian curvature is studied. The heat traces of the operators
relevant to SO(2) gauge-invariant Yang-Mills fields and Faddeev-Popov ghosts
are calculated on product spaces of S^2 and S^1 \times S^1. It is shown that
the chro... | [
{
"created": "Mon, 31 Aug 2009 05:12:13 GMT",
"version": "v1"
}
] | 2009-09-01 | [
[
"Collopy",
"Samuel J.",
""
]
] | The stability of the chromomagnetic Savvidy vacuum in QCD under the influence of positive Riemannian curvature is studied. The heat traces of the operators relevant to SO(2) gauge-invariant Yang-Mills fields and Faddeev-Popov ghosts are calculated on product spaces of S^2 and S^1 \times S^1. It is shown that the chromo... |
1810.03812 | Maximiliano Isi | Maximiliano Isi, Ling Sun, Richard Brito, and Andrew Melatos | Directed searches for gravitational waves from ultralight bosons | v3: journal version | Phys. Rev. D 99, 084042 (2019) | 10.1103/PhysRevD.99.084042 | LIGO-P1800270 | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave detectors can search for yet-undiscovered ultralight
bosons, including those conjectured to solve problems in particle physics,
high-energy theory and cosmology. Ground-based instruments could probe boson
masses between $10^{-15}$ eV to $10^{-11}$ eV, which are largely inaccessible
to other experim... | [
{
"created": "Tue, 9 Oct 2018 04:39:45 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Dec 2018 16:23:24 GMT",
"version": "v2"
},
{
"created": "Mon, 6 May 2019 00:18:18 GMT",
"version": "v3"
}
] | 2019-05-07 | [
[
"Isi",
"Maximiliano",
""
],
[
"Sun",
"Ling",
""
],
[
"Brito",
"Richard",
""
],
[
"Melatos",
"Andrew",
""
]
] | Gravitational-wave detectors can search for yet-undiscovered ultralight bosons, including those conjectured to solve problems in particle physics, high-energy theory and cosmology. Ground-based instruments could probe boson masses between $10^{-15}$ eV to $10^{-11}$ eV, which are largely inaccessible to other experimen... |
1708.01482 | Kazufumi Ninomiya | K. Ninomiya, T. Akiyama, M. Hata, M. Hatori, T. Iguri, Y. Ikeda, S.
Inaba, H. Kawamura, R. Kishi, H. Murakami, Y. Nakaya, H. Nishio, N. Ogawa, J.
Onishi, S. Saiba, T. Sakuta, S. Tanaka, R. Tanuma, Y. Totsuka, R. Tsutsui, K.
Watanabe and J. Murata | Short-range test of the universality of gravitational constant $G$ at
the millimeter scale using a digital image sensor | submitted to Class. Quantum Grav | Class. Quantum Grav. 34 185005, 2017 | 10.1088/1361-6382/aa837f | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The composition dependence of gravitational constant $G$ is measured at the
millimeter scale to test the weak equivalence principle, which may be violated
at short range through new Yukawa interactions such as the dilaton exchange
force. A torsion balance on a turning table with two identical tungsten targets
surroun... | [
{
"created": "Fri, 4 Aug 2017 13:12:26 GMT",
"version": "v1"
}
] | 2017-08-25 | [
[
"Ninomiya",
"K.",
""
],
[
"Akiyama",
"T.",
""
],
[
"Hata",
"M.",
""
],
[
"Hatori",
"M.",
""
],
[
"Iguri",
"T.",
""
],
[
"Ikeda",
"Y.",
""
],
[
"Inaba",
"S.",
""
],
[
"Kawamura",
"H.",
""
]... | The composition dependence of gravitational constant $G$ is measured at the millimeter scale to test the weak equivalence principle, which may be violated at short range through new Yukawa interactions such as the dilaton exchange force. A torsion balance on a turning table with two identical tungsten targets surrounde... |
gr-qc/9701063 | N. Redington | N. Redington | Literal Rippling of Spacetime | 4 pages | null | null | null | gr-qc | null | The metric perturbation tensor corresponding to a transverse oscillation of
spacetime is composed of products of cosines. When averaged over many
wavelengths, such a metric may look either Minkowskian or Euclidean at large
scales, depending on the amplitude and wavelength of the oscillation.
| [
{
"created": "Wed, 29 Jan 1997 22:48:17 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Redington",
"N.",
""
]
] | The metric perturbation tensor corresponding to a transverse oscillation of spacetime is composed of products of cosines. When averaged over many wavelengths, such a metric may look either Minkowskian or Euclidean at large scales, depending on the amplitude and wavelength of the oscillation. |
1711.06206 | Thiago R.P. Caram\^es | J\'ulio C. Fabris, Hermano Velten, Thiago R. P. Caram\^es, Matheus J.
Lazo and Gast\~ao S. F. Frederico | Cosmology from a new non-conservative gravity | 8 pages, 2 figures; version enriched with more discussion, graphs
were improved and new references added. To appear in IJMPD | Int. J. Mod. Phys. D 27, 1841006 (2018) | 10.1142/S0218271818410067 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we present a cosmological model arising from a non-conservative
gravitational theory proposed in [PRD 95, 101501(R) (2017)]. The novel feature
where comparing with previous implementations of dissipative effects in gravity
is the possible arising of such phenomena from a least action principle, so
they ... | [
{
"created": "Thu, 16 Nov 2017 17:24:32 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Nov 2017 19:43:33 GMT",
"version": "v2"
},
{
"created": "Wed, 20 Dec 2017 16:49:46 GMT",
"version": "v3"
}
] | 2018-05-28 | [
[
"Fabris",
"Júlio C.",
""
],
[
"Velten",
"Hermano",
""
],
[
"Caramês",
"Thiago R. P.",
""
],
[
"Lazo",
"Matheus J.",
""
],
[
"Frederico",
"Gastão S. F.",
""
]
] | In this paper we present a cosmological model arising from a non-conservative gravitational theory proposed in [PRD 95, 101501(R) (2017)]. The novel feature where comparing with previous implementations of dissipative effects in gravity is the possible arising of such phenomena from a least action principle, so they ar... |
2311.14278 | Tadashi Sasaki | Tadashi Sasaki | Deflection of Light by a Reissner-Nordstr\"om Black Hole and Painlev\'e
VI equation | 20 pages; added 3 references and 1 paragraph for Section 4, corrected
typos in reference list | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider the bending angle of the trajectory of a photon incident from and
deflected to infinity around a Reissner-Nordstr\"om black hole. We treat the
bending angle as a function of the squared reciprocal of the impact parameter
and the squared electric charge of the background normalized by the mass of the
black... | [
{
"created": "Fri, 24 Nov 2023 04:49:18 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Dec 2023 07:10:10 GMT",
"version": "v2"
}
] | 2023-12-04 | [
[
"Sasaki",
"Tadashi",
""
]
] | We consider the bending angle of the trajectory of a photon incident from and deflected to infinity around a Reissner-Nordstr\"om black hole. We treat the bending angle as a function of the squared reciprocal of the impact parameter and the squared electric charge of the background normalized by the mass of the black h... |
gr-qc/9809031 | Jorge Pullin | Jorge Pullin | Matters of Gravity, The newsletter of the APS Topical Group on
Gravitation | 31 pages, html.sty, Jorge Pullin (editor).
http://vishnu.nirvana.phys.psu.edu/mog.html | null | null | MOG-12 | gr-qc | null | Contents:
Editorial
News:
- Topical group news, by Jim Isenberg
- Summer school in gravitational physics opportunity, by Jim Hartle
- Bogart, Bergman and (Al)bert, by Clifford Will and Robert Riemer
- New data-analysis subgroups of the LSC, by Eanna Flanagan
- Marcel Bardon, a man of vision, by Richard ... | [
{
"created": "Mon, 7 Sep 1998 21:51:36 GMT",
"version": "v1"
}
] | 2009-03-10 | [
[
"Pullin",
"Jorge",
""
]
] | Contents: Editorial News: - Topical group news, by Jim Isenberg - Summer school in gravitational physics opportunity, by Jim Hartle - Bogart, Bergman and (Al)bert, by Clifford Will and Robert Riemer - New data-analysis subgroups of the LSC, by Eanna Flanagan - Marcel Bardon, a man of vision, by Richard Isaacson Researc... |
0705.2034 | Mauricio Bellini | Silvina Paola Gomez Martinez (Mar del Plata University), Lucio Fabio
P. da Silva (Paraiba University), Jose Edgar Madriz Aguilar (Paraiba
University), Mauricio Bellini (Mar del Plata University & CONICET) | Stochastic approach of gravitational waves in presence of a decaying
cosmological parameter from a 5D vacuum theory of gravity | version to be published in Il Nuovo Cimento B | Nuovo Cim.B122:897-907,2007; Nuovo Cim.122B:897-907,2007 | 10.1393/ncb/i2007-10414-7 | null | gr-qc hep-th | null | We develop an stochastic approach to study gravitational waves produced
during the inflationary epoch under the presence of a decaying cosmological
parameter, on a 5D geometrical background which is Riemann flat. We obtain that
the squared tensor metric fluctuations depend strongly on the cosmological
parameter $\Lam... | [
{
"created": "Mon, 14 May 2007 21:19:25 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Oct 2007 22:05:06 GMT",
"version": "v2"
},
{
"created": "Tue, 13 Nov 2007 20:39:51 GMT",
"version": "v3"
},
{
"created": "Tue, 11 Dec 2007 16:56:32 GMT",
"version": "v4"
},
{
"c... | 2010-11-15 | [
[
"Martinez",
"Silvina Paola Gomez",
"",
"Mar del Plata University"
],
[
"da Silva",
"Lucio Fabio P.",
"",
"Paraiba University"
],
[
"Aguilar",
"Jose Edgar Madriz",
"",
"Paraiba\n University"
],
[
"Bellini",
"Mauricio",
"",
"Mar del Plata ... | We develop an stochastic approach to study gravitational waves produced during the inflationary epoch under the presence of a decaying cosmological parameter, on a 5D geometrical background which is Riemann flat. We obtain that the squared tensor metric fluctuations depend strongly on the cosmological parameter $\Lambd... |
2003.10682 | Jing Ren | Ufuk Aydemir, Bob Holdom, Jing Ren | Not quite black holes as dark matter | 33 pages, 10 figures | Phys. Rev. D 102, 024058 (2020) | 10.1103/PhysRevD.102.024058 | null | gr-qc astro-ph.CO astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Primordial black holes that survive until the present have been considered as
a dark matter candidate. In this paper we argue that primordial 2-2-hole
remnants provide a more promising and testable option. 2-2-holes arise in
quadratic gravity as a new family of classical solutions for ultracompact
matter distribution... | [
{
"created": "Tue, 24 Mar 2020 06:40:10 GMT",
"version": "v1"
}
] | 2020-07-29 | [
[
"Aydemir",
"Ufuk",
""
],
[
"Holdom",
"Bob",
""
],
[
"Ren",
"Jing",
""
]
] | Primordial black holes that survive until the present have been considered as a dark matter candidate. In this paper we argue that primordial 2-2-hole remnants provide a more promising and testable option. 2-2-holes arise in quadratic gravity as a new family of classical solutions for ultracompact matter distributions ... |
gr-qc/0207076 | Nicola Rossano Bruno | Nicola Rossano Bruno | Group of boost and rotation transformations with two
observer-independent scales | revised version accepted for publication on Phys.Lett.B; one
reference corrected, some physical comments added. 6 pages, RevTex4 | Phys.Lett. B547 (2002) 109-115 | 10.1016/S0370-2693(02)02738-7 | null | gr-qc hep-th | null | I examine the structure of the deformed Lorentz transformations in one of the
recently-proposed schemes with two observer-independent scales. I develop a
technique for the analysis of general combinations of rotations and deformed
boosts. In particular, I verify explicitly that the transformations form group.
| [
{
"created": "Fri, 19 Jul 2002 13:45:21 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Sep 2002 16:45:02 GMT",
"version": "v2"
}
] | 2010-04-05 | [
[
"Bruno",
"Nicola Rossano",
""
]
] | I examine the structure of the deformed Lorentz transformations in one of the recently-proposed schemes with two observer-independent scales. I develop a technique for the analysis of general combinations of rotations and deformed boosts. In particular, I verify explicitly that the transformations form group. |
2310.08758 | Pedro Mario Ca\~nate Casseres | Pedro Ca\~nate | Simple method to generate magnetically charged ultra-static traversable
wormholes without exotic matter in Einstein-scalar-Gauss-Bonnet gravity | Typos corrected | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | All the magnetically charged ultrastatic and spherically symmetric spacetime
solutions in the framework of linear/nonlinear electrodynamics, with an
arbitrary electromagnetic Lagrangian density $\mathcal{L}(\mathcal{F})$
depending only of the electromagnetic invariant
$\mathcal{F}\!=\!F_{\alpha\beta}F^{\alpha\beta}\!... | [
{
"created": "Thu, 12 Oct 2023 22:55:57 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Dec 2023 16:24:40 GMT",
"version": "v2"
}
] | 2024-01-01 | [
[
"Cañate",
"Pedro",
""
]
] | All the magnetically charged ultrastatic and spherically symmetric spacetime solutions in the framework of linear/nonlinear electrodynamics, with an arbitrary electromagnetic Lagrangian density $\mathcal{L}(\mathcal{F})$ depending only of the electromagnetic invariant $\mathcal{F}\!=\!F_{\alpha\beta}F^{\alpha\beta}\!/4... |
2006.09414 | Tiago Fran\c{c}a | Pau Figueras and Tiago Fran\c{c}a | Gravitational Collapse in Cubic Horndeski Theories | 27 pages + 5 appendices (11 pages) + 16 figures. v2: additional
figure added. Updated to match published version | null | 10.1088/1361-6382/abb693 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study spherically symmetric gravitational collapse in cubic Horndeski
theories of gravity. By varying the coupling constants and the initial
amplitude of the scalar field, we determine the region in the space of
couplings and amplitudes for which it is possible to construct global solutions
to the Horndeski theori... | [
{
"created": "Tue, 16 Jun 2020 18:01:01 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Dec 2020 20:19:21 GMT",
"version": "v2"
}
] | 2020-12-18 | [
[
"Figueras",
"Pau",
""
],
[
"França",
"Tiago",
""
]
] | We study spherically symmetric gravitational collapse in cubic Horndeski theories of gravity. By varying the coupling constants and the initial amplitude of the scalar field, we determine the region in the space of couplings and amplitudes for which it is possible to construct global solutions to the Horndeski theories... |
2310.05823 | Federico De Lillo | Federico De Lillo, Jishnu Suresh | Estimating Astrophysical Population Properties using a multi-component
Stochastic Gravitational-Wave Background Search | 20 pages, 6 figures, 6 tables | null | null | null | gr-qc astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent start of the fourth observing run of the LIGO-Virgo-KAGRA (LVK)
collaboration has reopened the hunt for gravitational-wave (GW) signals, with
one compact-binary-coalescence (CBC) signal expected to be observed every few
days. Among the signals that could be detected for the first time there is the
stochast... | [
{
"created": "Mon, 9 Oct 2023 16:08:22 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Mar 2024 08:47:53 GMT",
"version": "v2"
}
] | 2024-03-27 | [
[
"De Lillo",
"Federico",
""
],
[
"Suresh",
"Jishnu",
""
]
] | The recent start of the fourth observing run of the LIGO-Virgo-KAGRA (LVK) collaboration has reopened the hunt for gravitational-wave (GW) signals, with one compact-binary-coalescence (CBC) signal expected to be observed every few days. Among the signals that could be detected for the first time there is the stochastic... |
1302.3337 | Sung Won Kim | Sung-Won Kim | Flare-out condition of Morris-Thorne wormhole and finiteness of pressure | null | null | 10.3938/jkps.63.1887 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Wormhole is defined as the topological structure with the throat connecting
two asymptotically flat spaces. In order to have and maintain the structure of
the wormhole, there needs the geometrical flare-out condition, i.e., the
minimal size at throat. In the case of Morris-Thorne type wormhole, the
condition is given... | [
{
"created": "Thu, 14 Feb 2013 08:19:32 GMT",
"version": "v1"
}
] | 2015-06-15 | [
[
"Kim",
"Sung-Won",
""
]
] | Wormhole is defined as the topological structure with the throat connecting two asymptotically flat spaces. In order to have and maintain the structure of the wormhole, there needs the geometrical flare-out condition, i.e., the minimal size at throat. In the case of Morris-Thorne type wormhole, the condition is given b... |
1405.0229 | Seyed Meraj Mousavi Rasouli | S. M. M. Rasouli, Mehrdad Farhoudi and Paulo Vargas Moniz | Modified Brans-Dicke Theory in Arbitrary Dimensions | 22 pages, 8 figures | Class. Quantum Grav. 31 (2014) 115002 | 10.1088/0264-9381/31/11/115002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within an algebraic framework, used to construct the induced-matter-theory
(IMT) setting, in $(D+1)$-dimensional Brans-Dicke (BD) scenario, we obtain a
modified BD theory (MBDT) in $D$ dimensions. Being more specific, from the
$(D+1)$-dimensional field equations, a $D$--dimensional BD theory, bearing new
features, is... | [
{
"created": "Thu, 1 May 2014 17:34:43 GMT",
"version": "v1"
},
{
"created": "Tue, 13 May 2014 14:25:12 GMT",
"version": "v2"
}
] | 2014-05-14 | [
[
"Rasouli",
"S. M. M.",
""
],
[
"Farhoudi",
"Mehrdad",
""
],
[
"Moniz",
"Paulo Vargas",
""
]
] | Within an algebraic framework, used to construct the induced-matter-theory (IMT) setting, in $(D+1)$-dimensional Brans-Dicke (BD) scenario, we obtain a modified BD theory (MBDT) in $D$ dimensions. Being more specific, from the $(D+1)$-dimensional field equations, a $D$--dimensional BD theory, bearing new features, is e... |
gr-qc/0111082 | Anjan Ananda Sen | A.A. Sen and S. Sethi (HRI, Allahabad, India) | Quintessence Model With Double Exponential Potential | 6 pages, Revtex Style, four eps figures,some new comments are added
regarding the fitting analysis. Conclusion has been rewritten. Accepted for
publication in Physics Letters B | Phys.Lett. B532 (2002) 159-165 | 10.1016/S0370-2693(02)01547-2 | null | gr-qc astro-ph hep-th | null | We have reinvestigated the quintessence model with minimally coupled scalar
field in the context of recent Supernova observation at $z=1.7$. By assuming
the form of the scale factor which gives both the early time deceleration and
late time acceleration, consistent with the observations, we show that one
needs a doub... | [
{
"created": "Sun, 25 Nov 2001 09:47:12 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Mar 2002 18:15:54 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Sen",
"A. A.",
"",
"HRI, Allahabad, India"
],
[
"Sethi",
"S.",
"",
"HRI, Allahabad, India"
]
] | We have reinvestigated the quintessence model with minimally coupled scalar field in the context of recent Supernova observation at $z=1.7$. By assuming the form of the scale factor which gives both the early time deceleration and late time acceleration, consistent with the observations, we show that one needs a double... |
gr-qc/0312059 | Roy Maartens | Roy Maartens (Portsmouth) | Brane-world gravity | Corrections, improvements, new references; to appear in Living
Reviews of Relativity; 58 pages, revtex4, 13 figs | Living Rev.Rel.7:7,2004 | 10.12942/lrr-2004-7 | null | gr-qc astro-ph hep-ph hep-th | null | The observable universe could be a 1+3-surface (the "brane") embedded in a
1+3+d-dimensional spacetime (the "bulk"), with standard-model particles and
fields trapped on the brane while gravity is free to access the bulk. At least
one of the d extra spatial dimensions could be very large relative to the
Planck scale, ... | [
{
"created": "Wed, 10 Dec 2003 15:55:27 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Apr 2004 11:00:56 GMT",
"version": "v2"
}
] | 2016-10-19 | [
[
"Maartens",
"Roy",
"",
"Portsmouth"
]
] | The observable universe could be a 1+3-surface (the "brane") embedded in a 1+3+d-dimensional spacetime (the "bulk"), with standard-model particles and fields trapped on the brane while gravity is free to access the bulk. At least one of the d extra spatial dimensions could be very large relative to the Planck scale, wh... |
1404.3864 | Vladimir Belinski | Vladimir A. Belinski | On the cosmological singularity | The invited paper for Proceedings of the XIII Marcel Grossmann
Meeting (Stockholm, 2012) by reason of the Marcel Grossmann Award to V.A.
Belinski and I.M. Khalatnikov | Inter. Journ. Modern Phys. D, vol.23, p.1430016 (2014) | 10.1142/S021827181430016X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The long story of the oscillatory approach to the initial cosmological
singularity and its more recent incarnation in multidimensional universe models
is told.
| [
{
"created": "Tue, 15 Apr 2014 10:37:36 GMT",
"version": "v1"
}
] | 2014-09-18 | [
[
"Belinski",
"Vladimir A.",
""
]
] | The long story of the oscillatory approach to the initial cosmological singularity and its more recent incarnation in multidimensional universe models is told. |
0907.3975 | Mark Fisher | Robert A. Bartnik, Mark Fisher, Todd A. Oliynyk | Static Spherically Symmetric Solutions of the SO(5) Einstein Yang-Mills
Equations | 11 pages, 5 figures, 1 table | J.Math.Phys.51:032504,2010 | 10.1063/1.3309500 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Globally regular (ie. asymptotically flat and regular interior), spherically
symmetric and localised ("particle-like") solutions of the coupled Einstein
Yang-Mills (EYM) equations with gauge group SU(2) have been known for more than
20 years, yet their properties are still not well understood. Spherically
symmetric Y... | [
{
"created": "Thu, 23 Jul 2009 03:04:25 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Bartnik",
"Robert A.",
""
],
[
"Fisher",
"Mark",
""
],
[
"Oliynyk",
"Todd A.",
""
]
] | Globally regular (ie. asymptotically flat and regular interior), spherically symmetric and localised ("particle-like") solutions of the coupled Einstein Yang-Mills (EYM) equations with gauge group SU(2) have been known for more than 20 years, yet their properties are still not well understood. Spherically symmetric Yan... |
1706.02969 | Tim Dietrich | Tim Dietrich, Sebastiano Bernuzzi, Wolfgang Tichy | Closed-form tidal approximants for binary neutron star gravitational
waveforms constructed from high-resolution numerical relativity simulations | null | Phys. Rev. D 96, 121501 (2017) | 10.1103/PhysRevD.96.121501 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct closed-form gravitational waveforms (GWs) with tidal effects for
the coalescence and merger of binary neutron stars. The method relies on a new
set of eccentricity-reduced and high-resolution numerical relativity (NR)
simulations and is composed of three steps. First, tidal contributions to the
GW phase ... | [
{
"created": "Fri, 9 Jun 2017 14:23:36 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Jul 2018 08:27:25 GMT",
"version": "v2"
}
] | 2018-07-06 | [
[
"Dietrich",
"Tim",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Tichy",
"Wolfgang",
""
]
] | We construct closed-form gravitational waveforms (GWs) with tidal effects for the coalescence and merger of binary neutron stars. The method relies on a new set of eccentricity-reduced and high-resolution numerical relativity (NR) simulations and is composed of three steps. First, tidal contributions to the GW phase ar... |
2301.12801 | Andrea Palessandro | Andrea Palessandro and Tony Rothman | Autocatalysis of Graviton Production via the Gertsenshtein Effect for
the Yang-Mills Field | 11 pages, no figures. V2: Largely as version one. Units changed to
conform to previous paper. Results unchanged but a few lines regarding
relationship to Higgs mechanism and neutrino oscillations rewritten. V3:
Ansatz slightly modified. Four-current introduced to satisfy constraint
equations. Results unchanged.... | Phys. Dark Univ. 42 (2023) 101341 | 10.1016/j.dark.2023.101341 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | As shown by Gertsenshtein in 1961, an external magnetic field can couple
electromagnetic to gravitational waves, giving rise to oscillations between
them. Viewed as a quantum process, the magnetic field has catalyzed the mixing
of photon and graviton states. We show that the self-interaction terms of the
Yang-Mills S... | [
{
"created": "Mon, 30 Jan 2023 11:51:12 GMT",
"version": "v1"
},
{
"created": "Sun, 14 May 2023 09:39:39 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Sep 2023 13:23:09 GMT",
"version": "v3"
}
] | 2023-10-06 | [
[
"Palessandro",
"Andrea",
""
],
[
"Rothman",
"Tony",
""
]
] | As shown by Gertsenshtein in 1961, an external magnetic field can couple electromagnetic to gravitational waves, giving rise to oscillations between them. Viewed as a quantum process, the magnetic field has catalyzed the mixing of photon and graviton states. We show that the self-interaction terms of the Yang-Mills SU(... |
gr-qc/0007083 | Mauricio Bellini | Mauricio Bellini (Universidad Nacional de Mar del Plata) | Warm inflation and scalar perturbations of the metric | 10 pages, no figures, to be published in General Rel. and Gravitation | Gen.Rel.Grav.33:127-143,2001 | 10.1023/A:1002053121300 | null | gr-qc | null | A second-order expansion for the quantum fluctuations of the matter field was
considered in the framework of the warm inflation scenario. The friction and
Hubble parameters were expended by means of a semiclassical approach. The
fluctuations of the Hubble parameter generates fluctuations of the metric.
These metric f... | [
{
"created": "Mon, 31 Jul 2000 13:55:30 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Jan 2001 16:59:20 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Bellini",
"Mauricio",
"",
"Universidad Nacional de Mar del Plata"
]
] | A second-order expansion for the quantum fluctuations of the matter field was considered in the framework of the warm inflation scenario. The friction and Hubble parameters were expended by means of a semiclassical approach. The fluctuations of the Hubble parameter generates fluctuations of the metric. These metric flu... |
0807.0448 | Dan Vollick | Dan N. Vollick | Homogeneous and isotropic cosmologies with nonlinear electromagnetic
radiation | 8 pages, change of title plus minor changes | Phys.Rev.D78:063524,2008 | 10.1103/PhysRevD.78.063524 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper I examine cosmological models that contain a stochastic
background of nonlinear electromagnetic radiation. I show that for Born-Infeld
electrodynamics the equation of state parameter, $w=P/\rho$, remains close to
1/3 throughout the evolution of the universe if $E^2=B^2$ in the late universe
to a high de... | [
{
"created": "Wed, 2 Jul 2008 20:42:11 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Nov 2008 23:55:33 GMT",
"version": "v2"
}
] | 2008-12-18 | [
[
"Vollick",
"Dan N.",
""
]
] | In this paper I examine cosmological models that contain a stochastic background of nonlinear electromagnetic radiation. I show that for Born-Infeld electrodynamics the equation of state parameter, $w=P/\rho$, remains close to 1/3 throughout the evolution of the universe if $E^2=B^2$ in the late universe to a high degr... |
1905.05628 | Robert J. Scherrer | John Kehayias and Robert J. Scherrer | A new generic evolution for $k$-essence dark energy with $w \approx -1$ | 7 pages, 2 figures, discussion and references added | Phys. Rev. D 100, 023525 (2019) | 10.1103/PhysRevD.100.023525 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reexamine $k$-essence dark energy models with a scalar field $\phi$ and a
factorized Lagrangian, $\mathcal L = V(\phi)F(X)$, with $X = \frac{1}{2}
\nabla_\mu \phi \nabla^\mu \phi.$ A value of the equation of state parameter,
$w$, near $-1$ requires either $X \approx 0$ or $dF/dX \approx 0$. Previous
work showed th... | [
{
"created": "Tue, 14 May 2019 14:14:15 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jun 2019 18:23:37 GMT",
"version": "v2"
}
] | 2019-07-24 | [
[
"Kehayias",
"John",
""
],
[
"Scherrer",
"Robert J.",
""
]
] | We reexamine $k$-essence dark energy models with a scalar field $\phi$ and a factorized Lagrangian, $\mathcal L = V(\phi)F(X)$, with $X = \frac{1}{2} \nabla_\mu \phi \nabla^\mu \phi.$ A value of the equation of state parameter, $w$, near $-1$ requires either $X \approx 0$ or $dF/dX \approx 0$. Previous work showed that... |
1006.2202 | Kohkichi Konno | Kohkichi Konno, Toyoki Matsuyama, Satoshi Tanda | Effects of Chern-Simons Corrections on Conserved Quantities of
Relativistic Fluid | 12 pages, Accepted for publication in Modern Physics Letters A | Mod.Phys.Lett.A25:2655-2666,2010 | 10.1142/S0217732310033876 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider relativistic fluid flow under Chern-Simons modified Maxwell
theory and under Chern-Simons modified gravity theory. We take account of the
effects of Chern-Simons corrections on the quantities of fluid flow that are
conserved without the Chern-Simons corrections. We find that the conservations
of several q... | [
{
"created": "Fri, 11 Jun 2010 05:37:14 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Konno",
"Kohkichi",
""
],
[
"Matsuyama",
"Toyoki",
""
],
[
"Tanda",
"Satoshi",
""
]
] | We consider relativistic fluid flow under Chern-Simons modified Maxwell theory and under Chern-Simons modified gravity theory. We take account of the effects of Chern-Simons corrections on the quantities of fluid flow that are conserved without the Chern-Simons corrections. We find that the conservations of several qua... |
gr-qc/0602085 | Marcin Jankiewicz | Marcin Jankiewicz, Anjan A. Sen | Black Holes and Generalized Scalar Field | 8 pages, LaTeX with elsart style | null | null | null | gr-qc | null | We study the possibility of occurrence of scalar hair with a non-canonical
kinetic term for a static, spherically symmetric asymptotically flat black hole
spacetime. We first obtain a general equation for this purpose and then
consider various examples for the kinetic term $F(X)$ with
$X=-{1\over{2}}\partial^{\mu}\ph... | [
{
"created": "Tue, 21 Feb 2006 20:15:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Jankiewicz",
"Marcin",
""
],
[
"Sen",
"Anjan A.",
""
]
] | We study the possibility of occurrence of scalar hair with a non-canonical kinetic term for a static, spherically symmetric asymptotically flat black hole spacetime. We first obtain a general equation for this purpose and then consider various examples for the kinetic term $F(X)$ with $X=-{1\over{2}}\partial^{\mu}\phi\... |
1408.3534 | Kazunari Eda | Kazunari Eda, Yousuke Itoh, Sachiko Kuroyanagi, Joseph Silk | Gravitational waves as a probe of dark matter mini-spikes | 19 pages, 8 figures | Phys. Rev. D 91, 044045 (2015) | 10.1103/PhysRevD.91.044045 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent studies show that an intermediate mass black hole (IMBH) may develop a
dark matter (DM) mini-halo according to some BH formation scenarios. We
consider a binary system composed of an IMBH surrounded by a DM mini-spike and
a stellar mass object orbiting around the IMBH. The binary evolves due to
gravitational p... | [
{
"created": "Fri, 15 Aug 2014 13:34:55 GMT",
"version": "v1"
}
] | 2015-03-05 | [
[
"Eda",
"Kazunari",
""
],
[
"Itoh",
"Yousuke",
""
],
[
"Kuroyanagi",
"Sachiko",
""
],
[
"Silk",
"Joseph",
""
]
] | Recent studies show that an intermediate mass black hole (IMBH) may develop a dark matter (DM) mini-halo according to some BH formation scenarios. We consider a binary system composed of an IMBH surrounded by a DM mini-spike and a stellar mass object orbiting around the IMBH. The binary evolves due to gravitational pul... |
1501.03478 | Zeeshan Yousaf | M. Sharif and Z. Yousaf | Energy Density Inhomogeneities with Polynomial $f(R)$ Cosmology | references are updated | Astrophys. Space Sci. 352(2014)321 | 10.1007/s10509-014-1913-z | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the effects of polynomial $f(R)$ model on the
stability of homogeneous energy density in self-gravitating spherical stellar
object. For this purpose, we construct couple of evolution equations which
relate the Weyl tensor with matter parameters. We explore different factors
responsible for den... | [
{
"created": "Fri, 15 Aug 2014 03:40:53 GMT",
"version": "v1"
}
] | 2016-03-14 | [
[
"Sharif",
"M.",
""
],
[
"Yousaf",
"Z.",
""
]
] | In this paper, we study the effects of polynomial $f(R)$ model on the stability of homogeneous energy density in self-gravitating spherical stellar object. For this purpose, we construct couple of evolution equations which relate the Weyl tensor with matter parameters. We explore different factors responsible for densi... |
1708.05621 | B\'eatrice Bonga | B\'eatrice Bonga, Jeffrey S. Hazboun | Power radiated by a binary system in a de Sitter Universe | 15 pages, 4 figures, accepted for publication in PRD | null | 10.1103/PhysRevD.96.064018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves emitted by high redshift sources propagate through
various epochs of the Universe including the current era of measurable,
accelerated expansion. Historically, the calculation of gravitational wave
power on cosmological backgrounds is based on various simplifications,
including a $1/r$-expansion a... | [
{
"created": "Fri, 18 Aug 2017 14:09:13 GMT",
"version": "v1"
}
] | 2017-10-11 | [
[
"Bonga",
"Béatrice",
""
],
[
"Hazboun",
"Jeffrey S.",
""
]
] | Gravitational waves emitted by high redshift sources propagate through various epochs of the Universe including the current era of measurable, accelerated expansion. Historically, the calculation of gravitational wave power on cosmological backgrounds is based on various simplifications, including a $1/r$-expansion and... |
2209.01955 | Gaoping Long | Gaoping Long, Xiangdong Zhang | On the gauge reduction with respect to simplicity constraint in all
dimensional loop quantum gravity | null | null | 10.1103/PhysRevD.107.046022 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | In this paper, we are going to discuss the gauge reduction with respect to
the simplicity constraint in both classical and quantum theory of all
dimensional loop quantum gravity. With the gauge reduction with respect to
edge-simplicity constraint being proceeded and the anomalous vertex simplicity
constraint being im... | [
{
"created": "Mon, 5 Sep 2022 13:20:08 GMT",
"version": "v1"
}
] | 2023-03-08 | [
[
"Long",
"Gaoping",
""
],
[
"Zhang",
"Xiangdong",
""
]
] | In this paper, we are going to discuss the gauge reduction with respect to the simplicity constraint in both classical and quantum theory of all dimensional loop quantum gravity. With the gauge reduction with respect to edge-simplicity constraint being proceeded and the anomalous vertex simplicity constraint being impo... |
1409.2687 | Chayan Ranjit | Chayan Ranjit, Ujjal Debnath | Reconstruction of Einstein-Aether Gravity from other Modified Gravity
Models | 13 pages, 10 figure, Accepted in The European Physical Journal - Plus | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We briefly describe the modified Friedmann equations for Einstein-Aether
gravity theory and we find the effective density and pressure. The purpose of
our present work is to reconstruction of Einstein-Aether Gravity from other
modified gravities like $f(T)$, $f(R)$, $f(G)$, $f(R,T)$ and $f(R,G)$ and check
its viabili... | [
{
"created": "Mon, 8 Sep 2014 07:57:40 GMT",
"version": "v1"
}
] | 2014-09-10 | [
[
"Ranjit",
"Chayan",
""
],
[
"Debnath",
"Ujjal",
""
]
] | We briefly describe the modified Friedmann equations for Einstein-Aether gravity theory and we find the effective density and pressure. The purpose of our present work is to reconstruction of Einstein-Aether Gravity from other modified gravities like $f(T)$, $f(R)$, $f(G)$, $f(R,T)$ and $f(R,G)$ and check its viability... |
1701.05824 | Parampreet Singh | Peter Diener, Anton Joe, Miguel Megevand, Parampreet Singh | Numerical simulations of loop quantum Bianchi-I spacetimes | Discussion of results expanded. Two figures added. To appear in the
focus issue on Applications of Loop Quantum Gravity to Cosmology in CQG | Class. Quantum Grav. 34 094004 (2017) | 10.1088/1361-6382/aa68b5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Due to the numerical complexities of studying evolution in an anisotropic
quantum spacetime, in comparison to the isotropic models, the physics of loop
quantized anisotropic models has remained largely unexplored. In particular,
robustness of bounce and the validity of effective dynamics have so far not
been establis... | [
{
"created": "Fri, 20 Jan 2017 15:23:46 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Mar 2017 23:54:18 GMT",
"version": "v2"
}
] | 2017-04-14 | [
[
"Diener",
"Peter",
""
],
[
"Joe",
"Anton",
""
],
[
"Megevand",
"Miguel",
""
],
[
"Singh",
"Parampreet",
""
]
] | Due to the numerical complexities of studying evolution in an anisotropic quantum spacetime, in comparison to the isotropic models, the physics of loop quantized anisotropic models has remained largely unexplored. In particular, robustness of bounce and the validity of effective dynamics have so far not been establishe... |
1507.01720 | Guillaume Faye | Luc Blanchet, Guillaume Faye, Bernard F. Whiting | High-order comparisons between post-Newtonian and perturbative self
forces | 6 pages; contribution to the proceedings of the 50th Rencontres de
Moriond, "Gravitation: 100 years after GR" | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent numerical and analytic computations based on the self-force (SF)
formalism in general relativity showed that half-integral post-Newtonian (PN)
terms, i.e. terms involving odd powers of 1/c, arise in the redshift factor of
small mass-ratio black-hole binaries on exact circular orbits. Although those
contributio... | [
{
"created": "Tue, 7 Jul 2015 09:20:53 GMT",
"version": "v1"
}
] | 2015-07-08 | [
[
"Blanchet",
"Luc",
""
],
[
"Faye",
"Guillaume",
""
],
[
"Whiting",
"Bernard F.",
""
]
] | Recent numerical and analytic computations based on the self-force (SF) formalism in general relativity showed that half-integral post-Newtonian (PN) terms, i.e. terms involving odd powers of 1/c, arise in the redshift factor of small mass-ratio black-hole binaries on exact circular orbits. Although those contributions... |
2309.06914 | Massimo Giovannini | Massimo Giovannini | Relic gravitons and pulsar timing arrays: a theoretical viewpoint | 40 pages, 15 included figures; comments added and corrected typos to
match the version in press | Eur.Phys.J.C 84 (2024) 2, 67 | 10.1140/epjc/s10052-024-12419-z | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | During the last three years the pulsar timing arrays reported a series of
repeated evidences of gravitational radiation (with stochastically distributed
Fourier amplitudes) at a benchmark frequency of the order of $30$ nHz and
characterized by spectral energy densities (in critical units) ranging between
$10^{-8}$ an... | [
{
"created": "Wed, 13 Sep 2023 12:24:22 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Jan 2024 15:36:54 GMT",
"version": "v2"
}
] | 2024-01-24 | [
[
"Giovannini",
"Massimo",
""
]
] | During the last three years the pulsar timing arrays reported a series of repeated evidences of gravitational radiation (with stochastically distributed Fourier amplitudes) at a benchmark frequency of the order of $30$ nHz and characterized by spectral energy densities (in critical units) ranging between $10^{-8}$ and ... |
gr-qc/0405017 | Vladimir Dzhunushaliev | V. Dzhunushaliev | Wormhole solutions in 5D Kaluza-Klein theory as string-like objects | 29 pages, 10 figures | Horizons in World Physics, vol. 247, New Developments in Quantum
Cosmology Research, p. 113-139, ed. A. Reimer, (Nova Science Publishers, New
York, 2005) | null | null | gr-qc hep-th | null | The detailed numerical and analytical approximate analysis of wormhole-like
solutions in 5D Kaluza-Klein gravity is given. It is shown that some part of
these solutions with $E \approx H, E>H$ relation between electric $E$ and
magnetic $H$ fields can be considered as a superthin and superlong
gravitational flux tube ... | [
{
"created": "Wed, 5 May 2004 01:37:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dzhunushaliev",
"V.",
""
]
] | The detailed numerical and analytical approximate analysis of wormhole-like solutions in 5D Kaluza-Klein gravity is given. It is shown that some part of these solutions with $E \approx H, E>H$ relation between electric $E$ and magnetic $H$ fields can be considered as a superthin and superlong gravitational flux tube fi... |
gr-qc/0406100 | Etera R. Livine | Florian Girelli, Etera R. Livine, Daniele Oriti | Deformed Special Relativity as an effective flat limit of quantum
gravity | 18 pages, RevTex4, 2 figures | Nucl.Phys. B708 (2005) 411-433 | 10.1016/j.nuclphysb.2004.11.026 | null | gr-qc hep-th | null | We argue that a (slightly) curved space-time probed with a finite resolution,
equivalently a finite minimal length, is effectively described by a flat
non-commutative space-time. More precisely, a small cosmological constant (so a
constant curvature) leads the kappa-deformed Poincar\'e flat space-time of
deformed spe... | [
{
"created": "Thu, 24 Jun 2004 15:00:03 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Girelli",
"Florian",
""
],
[
"Livine",
"Etera R.",
""
],
[
"Oriti",
"Daniele",
""
]
] | We argue that a (slightly) curved space-time probed with a finite resolution, equivalently a finite minimal length, is effectively described by a flat non-commutative space-time. More precisely, a small cosmological constant (so a constant curvature) leads the kappa-deformed Poincar\'e flat space-time of deformed speci... |
2308.12713 | Enrico Junior Schioppa | Luca Abrahao, Francesco Coradeschi, Antonia Micol Frassino, Thiago
Guerreiro, Jennifer Rittenhouse West and Enrico Junior Schioppa | The quantum optics of gravitational waves | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | By utilizing quantum optics techniques, we examine the characteristics of a
quantum gravitational wave (GW) signature at interferometers. In particular, we
study the problem by analyzing the equations of motion of a GW interacting with
an idealized interferometer. Using this method, we reconstruct the classical GW
si... | [
{
"created": "Thu, 24 Aug 2023 11:17:47 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Aug 2023 12:29:24 GMT",
"version": "v2"
}
] | 2023-08-28 | [
[
"Abrahao",
"Luca",
""
],
[
"Coradeschi",
"Francesco",
""
],
[
"Frassino",
"Antonia Micol",
""
],
[
"Guerreiro",
"Thiago",
""
],
[
"West",
"Jennifer Rittenhouse",
""
],
[
"Schioppa",
"Enrico Junior",
""
]
] | By utilizing quantum optics techniques, we examine the characteristics of a quantum gravitational wave (GW) signature at interferometers. In particular, we study the problem by analyzing the equations of motion of a GW interacting with an idealized interferometer. Using this method, we reconstruct the classical GW sign... |
gr-qc/0311061 | David Vitali | David Vitali, Michele Punturo, Stefano Mancini, Paolo Amico, Paolo
Tombesi | Noise reduction in gravitational wave interferometers using feedback | 12 pages, 2 figures, in print in the Special Issue of J. Opt. B on
Fluctuations and Noise in Photonics and Quantum Optics | J.Opt.B Quant.Semiclass.Opt. 6 (2004) S691-S697 | 10.1088/1464-4266/6/8/010 | null | gr-qc quant-ph | null | We show that the quantum locking scheme recently proposed by Courty {\it et
al.} [Phys. Rev. Lett. {\bf 90}, 083601 (2003)] for the reduction of back
action noise is able to significantly improve the sensitivity of the next
generation of gravitational wave interferometers.
| [
{
"created": "Wed, 19 Nov 2003 10:20:28 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Feb 2004 10:01:12 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Vitali",
"David",
""
],
[
"Punturo",
"Michele",
""
],
[
"Mancini",
"Stefano",
""
],
[
"Amico",
"Paolo",
""
],
[
"Tombesi",
"Paolo",
""
]
] | We show that the quantum locking scheme recently proposed by Courty {\it et al.} [Phys. Rev. Lett. {\bf 90}, 083601 (2003)] for the reduction of back action noise is able to significantly improve the sensitivity of the next generation of gravitational wave interferometers. |
gr-qc/0008049 | Paola Zizzi | P. A. Zizzi | Quantum Computation toward Quantum Gravity | 11 pages. Contributed to XIII International Congress on Mathematical
Physics (ICMP 2000), London, England, 17-22 Jul 2000. Typos corrected.
Accepted for publication in General Relativity and Gravitation | Gen.Rel.Grav. 33 (2001) 1305-1318 | 10.1023/A:1012053424024 | null | gr-qc hep-th quant-ph | null | The aim of this paper is to enlight the emerging relevance of Quantum
Information Theory in the field of Quantum Gravity. As it was suggested by J.
A. Wheeler, information theory must play a relevant role in understanding the
foundations of Quantum Mechanics (the "It from bit" proposal). Here we suggest
that quantum ... | [
{
"created": "Mon, 21 Aug 2000 11:28:51 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Sep 2000 07:48:06 GMT",
"version": "v2"
},
{
"created": "Sun, 25 Feb 2001 14:26:04 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Zizzi",
"P. A.",
""
]
] | The aim of this paper is to enlight the emerging relevance of Quantum Information Theory in the field of Quantum Gravity. As it was suggested by J. A. Wheeler, information theory must play a relevant role in understanding the foundations of Quantum Mechanics (the "It from bit" proposal). Here we suggest that quantum in... |
1104.4546 | Francesco Cianfrani dr | Francesco Cianfrani, Giovanni Montani | Implications of the gauge-fixing in Loop Quantum Cosmology | 7 pages, accepted for publication in Physical Review D | Phys. Rev. D, 85. 024027(2012) | 10.1103/PhysRevD.85.024027 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The restriction to invariant connections in a Friedmann-Robertson-Walker
space-time is discussed via the analysis of the Dirac brackets associated with
the corresponding gauge fixing. This analysis allows us to establish the proper
correspondence between reduced and un-reduced variables. In this respect, it is
outlin... | [
{
"created": "Sat, 23 Apr 2011 10:52:52 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Nov 2011 14:04:43 GMT",
"version": "v2"
},
{
"created": "Wed, 11 Jan 2012 15:36:44 GMT",
"version": "v3"
}
] | 2015-05-27 | [
[
"Cianfrani",
"Francesco",
""
],
[
"Montani",
"Giovanni",
""
]
] | The restriction to invariant connections in a Friedmann-Robertson-Walker space-time is discussed via the analysis of the Dirac brackets associated with the corresponding gauge fixing. This analysis allows us to establish the proper correspondence between reduced and un-reduced variables. In this respect, it is outlined... |
2011.01213 | Leong Khim Wong | Philippe Brax, Anne-Christine Davis, Scott Melville, Leong Khim Wong | Spin precession as a new window into disformal scalar fields | 22 pages + an appendix, 3 figures. v2: Version accepted for
publication. Typos in Table 1, Eq. (3.21), and Eq. (3.26) have been corrected | JCAP 03 (2021) 001 | 10.1088/1475-7516/2021/03/001 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We launch a first investigation into how a light scalar field coupled both
conformally and disformally to matter influences the evolution of spinning
point-like bodies. Working directly at the level of the equations of motion, we
derive novel spin-orbit and spin-spin effects accurate to leading order in a
nonrelativi... | [
{
"created": "Mon, 2 Nov 2020 18:58:02 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Mar 2021 16:00:03 GMT",
"version": "v2"
}
] | 2021-03-09 | [
[
"Brax",
"Philippe",
""
],
[
"Davis",
"Anne-Christine",
""
],
[
"Melville",
"Scott",
""
],
[
"Wong",
"Leong Khim",
""
]
] | We launch a first investigation into how a light scalar field coupled both conformally and disformally to matter influences the evolution of spinning point-like bodies. Working directly at the level of the equations of motion, we derive novel spin-orbit and spin-spin effects accurate to leading order in a nonrelativist... |
0810.4848 | C\'esar Henrique Lenzi CHL | C.H. Lenzi, M. Malheiro, R. M. Marinho, C. Provid\^encia and G. F.
Marranghello | Determination of the neutron star mass-radii relation using narrow-band
gravitational wave detector | 10 pages and 3 figures | J.Phys.Conf.Ser.154:012039,2009 | 10.1088/1742-6596/154/1/012039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The direct detection of gravitational waves will provide valuable
astrophysical information about many celestial objects. The most promising
sources of gravitational waves are neutron stars and black holes. These objects
emit waves in a very wide spectrum of frequencies determined by their
quasi-normal modes oscillat... | [
{
"created": "Mon, 27 Oct 2008 15:41:56 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Oct 2008 12:40:59 GMT",
"version": "v2"
},
{
"created": "Fri, 19 Dec 2008 15:39:05 GMT",
"version": "v3"
},
{
"created": "Wed, 21 Jan 2009 20:40:19 GMT",
"version": "v4"
}
] | 2010-04-21 | [
[
"Lenzi",
"C. H.",
""
],
[
"Malheiro",
"M.",
""
],
[
"Marinho",
"R. M.",
""
],
[
"Providência",
"C.",
""
],
[
"Marranghello",
"G. F.",
""
]
] | The direct detection of gravitational waves will provide valuable astrophysical information about many celestial objects. The most promising sources of gravitational waves are neutron stars and black holes. These objects emit waves in a very wide spectrum of frequencies determined by their quasi-normal modes oscillatio... |
0902.4318 | Eduard Masso | Eduard Masso (Univ. Autonoma Barcelona) | The Weight of Vacuum Fluctuations | 7 pages. v2 with a comment added and some typos fixed. It matches
article to be published in Phys. Lett. B | Phys.Lett.B679:433-435,2009 | 10.1016/j.physletb.2009.08.007 | UAB-FT-663 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the gravitational properties of Lamb shift energies. Using
available experimental data we show that these energies have a standard
gravitational behavior at the level of $\sim 10^{-5}$. We are motivated by the
point of view that Lamb shift energies may be interpreted as a consequence of
vacuum fluctuations... | [
{
"created": "Wed, 25 Feb 2009 08:56:14 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Aug 2009 12:41:56 GMT",
"version": "v2"
}
] | 2009-09-28 | [
[
"Masso",
"Eduard",
"",
"Univ. Autonoma Barcelona"
]
] | We examine the gravitational properties of Lamb shift energies. Using available experimental data we show that these energies have a standard gravitational behavior at the level of $\sim 10^{-5}$. We are motivated by the point of view that Lamb shift energies may be interpreted as a consequence of vacuum fluctuations o... |
gr-qc/0410061 | Masayuki Tanimoto | Masayuki Tanimoto | Scalar fields on SL(2,R) and H^2 x R geometric spacetimes and linear
perturbations | 23 pages, no figures, to be published in Class. Quant. Gravit | Class.Quant.Grav.21:5355-5374,2004 | 10.1088/0264-9381/21/23/005 | null | gr-qc hep-th | null | Using appropriate harmonics, we study the future asymptotic behavior of
massless scalar fields on a class of cosmological vacuum spacetimes. The
spatial manifold is assumed to be a circle bundle over a higher genus surface
with a locally homogeneous metric. Such a manifold corresponds to the
SL(2,R)-geometry (Bianchi... | [
{
"created": "Thu, 14 Oct 2004 13:27:30 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Tanimoto",
"Masayuki",
""
]
] | Using appropriate harmonics, we study the future asymptotic behavior of massless scalar fields on a class of cosmological vacuum spacetimes. The spatial manifold is assumed to be a circle bundle over a higher genus surface with a locally homogeneous metric. Such a manifold corresponds to the SL(2,R)-geometry (Bianchi V... |
gr-qc/0306019 | Claus Lammerzahl | Giovanni Amelino-Camelia and Claus Lammerzahl | Quantum-gravity-motivated Lorentz-symmetry tests with laser
interferometers | 17 pages, 3 figures | Class.Quant.Grav.21:899-916,2004 | 10.1088/0264-9381/21/4/010 | null | gr-qc astro-ph hep-ph hep-th | null | We consider the implications for laser interferometry of the
quantum-gravity-motivated modifications in the laws of particle propagation,
which are presently being considered in attempts to explain puzzling
observations of ultra-high-energy cosmic rays. We show that there are
interferometric setups in which the Planc... | [
{
"created": "Wed, 4 Jun 2003 17:28:43 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Amelino-Camelia",
"Giovanni",
""
],
[
"Lammerzahl",
"Claus",
""
]
] | We consider the implications for laser interferometry of the quantum-gravity-motivated modifications in the laws of particle propagation, which are presently being considered in attempts to explain puzzling observations of ultra-high-energy cosmic rays. We show that there are interferometric setups in which the Planck-... |
gr-qc/9705039 | Yuri N. Obukhov | Yu.N. Obukhov, E.J. Vlachynsky, W. Esser, and F.W. Hehl | Irreducible decompositions in metric-affine gravity models | 27 pages, RevTex | null | null | null | gr-qc | null | The irreducible decomposition technique is applied to the study of classical
models of metric-affine gravity (MAG). The dynamics of the gravitational field
is described by a 12-parameter Lagrangian encompassing a Hilbert-Einstein term,
torsion and nonmetricity square terms, and one quadratic curvature piece that
is b... | [
{
"created": "Wed, 14 May 1997 14:27:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Obukhov",
"Yu. N.",
""
],
[
"Vlachynsky",
"E. J.",
""
],
[
"Esser",
"W.",
""
],
[
"Hehl",
"F. W.",
""
]
] | The irreducible decomposition technique is applied to the study of classical models of metric-affine gravity (MAG). The dynamics of the gravitational field is described by a 12-parameter Lagrangian encompassing a Hilbert-Einstein term, torsion and nonmetricity square terms, and one quadratic curvature piece that is bui... |
0812.3532 | Jian-Yang Zhu | Li-Fang Li and Jian-Yang Zhu | Averaged null energy condition in Loop Quantum Cosmology | 5 pages | Phys.Rev.D79:044011,2009 | 10.1103/PhysRevD.79.044011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Wormhole and time machine are very interesting objects in general relativity.
However, they need exotic matters which are impossible in classical level to
support them. But if we introduce the quantum effects of gravity into the
stress-energy tensor, these peculiar objects can be constructed
self-consistently. Fortun... | [
{
"created": "Thu, 18 Dec 2008 13:27:51 GMT",
"version": "v1"
}
] | 2010-04-30 | [
[
"Li",
"Li-Fang",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | Wormhole and time machine are very interesting objects in general relativity. However, they need exotic matters which are impossible in classical level to support them. But if we introduce the quantum effects of gravity into the stress-energy tensor, these peculiar objects can be constructed self-consistently. Fortunat... |
2007.03255 | Morteza Rafiee | Seyed Ali Hosseini Mansoori, Morteza Rafiee, Shao-Wen Wei | Universal criticality of thermodynamic curvatures for charged AdS black
holes | 18 pages, 3 figures, 3 tables, Accepted by PRD | Phys. Rev. D 102, 124066 (2020) | 10.1103/PhysRevD.102.124066 | null | gr-qc cond-mat.stat-mech hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we analytically study the critical exponents and universal
amplitudes of the thermodynamic curvatures such as the intrinsic and extrinsic
curvature at the critical point of the small-large black hole phase transition
for the charged AdS black holes. At the critical point, it is found that the
normalize... | [
{
"created": "Tue, 7 Jul 2020 07:51:01 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jul 2020 06:22:08 GMT",
"version": "v2"
},
{
"created": "Mon, 21 Dec 2020 06:39:22 GMT",
"version": "v3"
}
] | 2021-01-04 | [
[
"Mansoori",
"Seyed Ali Hosseini",
""
],
[
"Rafiee",
"Morteza",
""
],
[
"Wei",
"Shao-Wen",
""
]
] | In this paper, we analytically study the critical exponents and universal amplitudes of the thermodynamic curvatures such as the intrinsic and extrinsic curvature at the critical point of the small-large black hole phase transition for the charged AdS black holes. At the critical point, it is found that the normalized ... |
1908.04445 | Marcelo E. Rubio | A. L. Garcia-Perciante, Marcelo E. Rubio and Oscar A. Reula | Generic instabilities in the relativistic Chapman-Enskog heat conduction
law | 9 pages, 2 figures, refs added | JSP (2020) | 10.1007/s10955-020-02578-0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We address the well-posedness of the Cauchy problem corresponding to the
relativistic fluid equations, when coupled with the heat-flux constitutive
relation arising within the relativistic Chapman-Enskog procedure. The
resulting system of equations is shown to be non hyperbolic, by considering
general perturbations o... | [
{
"created": "Tue, 13 Aug 2019 00:46:04 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Nov 2019 02:52:40 GMT",
"version": "v2"
}
] | 2020-06-11 | [
[
"Garcia-Perciante",
"A. L.",
""
],
[
"Rubio",
"Marcelo E.",
""
],
[
"Reula",
"Oscar A.",
""
]
] | We address the well-posedness of the Cauchy problem corresponding to the relativistic fluid equations, when coupled with the heat-flux constitutive relation arising within the relativistic Chapman-Enskog procedure. The resulting system of equations is shown to be non hyperbolic, by considering general perturbations ove... |
2009.13242 | A. Yu. Petrov | J. R. Nascimento, A. Yu. Petrov, P. Porf\'irio, A. F. Santos | G\"{o}del-type Solutions in Cubic Galileon Gravity | 16 pages | Phys. Rev. D 102, 104064 (2020) | 10.1103/PhysRevD.102.104064 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We address the homogeneous in space and time (ST-homogeneous) G\"{o}del-type
metrics within the cubic galileon theory, a particular class of generalized
galileon theories. We check the consistency of such spacetimes for a physically
well-motivated matter content, namely, a perfect fluid and an electromagnetic
field. ... | [
{
"created": "Mon, 28 Sep 2020 12:17:12 GMT",
"version": "v1"
}
] | 2020-11-26 | [
[
"Nascimento",
"J. R.",
""
],
[
"Petrov",
"A. Yu.",
""
],
[
"Porfírio",
"P.",
""
],
[
"Santos",
"A. F.",
""
]
] | We address the homogeneous in space and time (ST-homogeneous) G\"{o}del-type metrics within the cubic galileon theory, a particular class of generalized galileon theories. We check the consistency of such spacetimes for a physically well-motivated matter content, namely, a perfect fluid and an electromagnetic field. In... |
gr-qc/0507039 | J. A. R. Cembranos | J. A. R. Cembranos | The Newtonian limit at intermediate energies | 4 pages, REVTeX 4; minor typos corrected, one reference added | Phys.Rev.D73:064029,2006 | 10.1103/PhysRevD.73.064029 | UCI-TR-2005-30 | gr-qc | null | We study the metric solutions for the gravitational equations in Modified
Gravity Models (MGMs). In models with negative powers of the scalar curvature,
we show that the Newtonian Limit (NL) is well defined as a limit at
intermediate energies, in contrast with the usual low energy interpretation.
Indeed, we show that... | [
{
"created": "Sat, 9 Jul 2005 18:20:43 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jul 2005 18:29:12 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Cembranos",
"J. A. R.",
""
]
] | We study the metric solutions for the gravitational equations in Modified Gravity Models (MGMs). In models with negative powers of the scalar curvature, we show that the Newtonian Limit (NL) is well defined as a limit at intermediate energies, in contrast with the usual low energy interpretation. Indeed, we show that t... |
1709.08413 | Ramil Izmailov N | R.Kh. Karimov, R.N. Izmailov, A.A. Potapov and K.K. Nandi | Terrestrial Sagnac delay constraining modified gravity models | 18 pages, 3 figures | Gen. Relativ. Gravit. 50 (2018) 44 | 10.1007/s10714-018-2365-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified gravity theories include $f(\mathbf{R})-$gravity models that are
usually constrained by the cosmological evolutionary scenario. However, it has
been recently shown that they can also be constrained by the signatures of
accretion disk around constant Ricci curvature Kerr-$f(\mathbf{R}_{0})$ stellar
sized blac... | [
{
"created": "Mon, 25 Sep 2017 10:15:08 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Apr 2018 10:16:25 GMT",
"version": "v2"
}
] | 2018-04-03 | [
[
"Karimov",
"R. Kh.",
""
],
[
"Izmailov",
"R. N.",
""
],
[
"Potapov",
"A. A.",
""
],
[
"Nandi",
"K. K.",
""
]
] | Modified gravity theories include $f(\mathbf{R})-$gravity models that are usually constrained by the cosmological evolutionary scenario. However, it has been recently shown that they can also be constrained by the signatures of accretion disk around constant Ricci curvature Kerr-$f(\mathbf{R}_{0})$ stellar sized black ... |
1811.00072 | Daniel Charbul\'ak | Zden\v{e}k Stuchl\'ik, Daniel Charbul\'ak and Jan Schee | Light escape cones in local reference frames of Kerr-de Sitter black
hole spacetimes and related black hole shadows | 58 pages, 136 figures | The European Physical Journal C, 78(3):180, Mar 2018 | 10.1140/epjc/s10052-018-5578-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct the light escape cones of isotropic spot sources of radiation
residing in special classes of reference frames in the Kerr-de Sitter (KdS)
black hole spacetimes, namely, in the fundamental class of 'non-geodesic'
locally non-rotating reference frames (LNRFs), and two classes of 'geodesic'
frames, the radi... | [
{
"created": "Wed, 31 Oct 2018 19:14:53 GMT",
"version": "v1"
}
] | 2018-11-02 | [
[
"Stuchlík",
"Zdeněk",
""
],
[
"Charbulák",
"Daniel",
""
],
[
"Schee",
"Jan",
""
]
] | We construct the light escape cones of isotropic spot sources of radiation residing in special classes of reference frames in the Kerr-de Sitter (KdS) black hole spacetimes, namely, in the fundamental class of 'non-geodesic' locally non-rotating reference frames (LNRFs), and two classes of 'geodesic' frames, the radial... |
gr-qc/0108003 | Oliver Henkel | Oliver Henkel | Local Prescribed Mean Curvature foliations in cosmological spacetimes | 23 pages, no figures | null | 10.1063/1.1466882 | null | gr-qc | null | A theorem about local in time existence of spacelike foliations with
prescribed mean curvature in cosmological spacetimes will be proved. The time
function of the foliation is geometrically defined and fixes the diffeomorphism
invariance inherent in general foliations of spacetimes. Moreover, in contrast
to the situa... | [
{
"created": "Wed, 1 Aug 2001 16:36:12 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Henkel",
"Oliver",
""
]
] | A theorem about local in time existence of spacelike foliations with prescribed mean curvature in cosmological spacetimes will be proved. The time function of the foliation is geometrically defined and fixes the diffeomorphism invariance inherent in general foliations of spacetimes. Moreover, in contrast to the situati... |
2209.02176 | Kazufumi Takahashi | Kazufumi Takahashi, Masato Minamitsuji, Hayato Motohashi | Generalized disformal Horndeski theories: cosmological perturbations and
consistent matter coupling | 23 pages, 2 figures | PTEP 2023, 013E01 (2023) | 10.1093/ptep/ptac161 | YITP-22-89 | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | Invertible disformal transformations are a useful tool to investigate
ghost-free scalar-tensor theories. By performing a higher-derivative
generalization of the invertible disformal transformation on Horndeski
theories, we construct a novel class of ghost-free scalar-tensor theories,
which we dub generalized disforma... | [
{
"created": "Tue, 6 Sep 2022 01:46:50 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Jan 2023 11:02:03 GMT",
"version": "v2"
}
] | 2023-01-16 | [
[
"Takahashi",
"Kazufumi",
""
],
[
"Minamitsuji",
"Masato",
""
],
[
"Motohashi",
"Hayato",
""
]
] | Invertible disformal transformations are a useful tool to investigate ghost-free scalar-tensor theories. By performing a higher-derivative generalization of the invertible disformal transformation on Horndeski theories, we construct a novel class of ghost-free scalar-tensor theories, which we dub generalized disformal ... |
gr-qc/9604008 | Matt Visser | Matt Visser (Washington University) | Gravitational vacuum polarization II: Energy conditions in the Boulware
vacuum | 8 pages, ReV_TeX | Phys.Rev.D54:5116-5122,1996 | 10.1103/PhysRevD.54.5116 | null | gr-qc hep-th | null | I show that in the Boulware vacuum (1) all standard (point-wise and averaged)
energy conditions are violated throughout the exterior region---all the way
from spatial infinity down to the event horizon, and (2) outside the event
horizon the standard point-wise energy conditions are violated in a maximal
manner: they ... | [
{
"created": "Wed, 3 Apr 1996 01:31:02 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Visser",
"Matt",
"",
"Washington University"
]
] | I show that in the Boulware vacuum (1) all standard (point-wise and averaged) energy conditions are violated throughout the exterior region---all the way from spatial infinity down to the event horizon, and (2) outside the event horizon the standard point-wise energy conditions are violated in a maximal manner: they ar... |
2303.04813 | Behzad Eslam Panah | A. Bagheri Tudeshki, G. H. Bordbar, and B. Eslam Panah | Effect of massive graviton on dark energy star structure | 17 pages, 10 figures, 4 tables | Phys. Dark Universe. 42 (2023) 101354 | 10.1016/j.dark.2023.101354 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The presence of massive gravitons in the field of massive gravity is
considered as an important factor in investigating the structure of compact
objects. Hence, we are encouraged to study the dark energy star structure in
the Vegh's massive gravity. We consider that the equation of state governing
the inner spacetime... | [
{
"created": "Wed, 8 Mar 2023 07:43:17 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Oct 2023 08:06:48 GMT",
"version": "v2"
}
] | 2023-10-17 | [
[
"Tudeshki",
"A. Bagheri",
""
],
[
"Bordbar",
"G. H.",
""
],
[
"Panah",
"B. Eslam",
""
]
] | The presence of massive gravitons in the field of massive gravity is considered as an important factor in investigating the structure of compact objects. Hence, we are encouraged to study the dark energy star structure in the Vegh's massive gravity. We consider that the equation of state governing the inner spacetime o... |
1303.1807 | Ezra Newman | Ezra T. Newman | On Integrating the Left-Flat Vacuum Einstein Equations | the mislabeling of equations has been fixed | null | 10.1088/0264-9381/31/1/015013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Considering the spin-coefficient version of the left-flat vacuum Einstein
equations, all but one of the fifty equations can be explicitly integrated via
the introduction of five spin-weight s=-2 complex potentials. The final
equation is a non-linear wave equation for the last of the potentials.
Solutions to this equa... | [
{
"created": "Thu, 7 Mar 2013 20:41:48 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Apr 2013 15:27:35 GMT",
"version": "v2"
}
] | 2015-06-15 | [
[
"Newman",
"Ezra T.",
""
]
] | Considering the spin-coefficient version of the left-flat vacuum Einstein equations, all but one of the fifty equations can be explicitly integrated via the introduction of five spin-weight s=-2 complex potentials. The final equation is a non-linear wave equation for the last of the potentials. Solutions to this equati... |
1211.1557 | Carlos Augusto Romero Filho | J. B. Fonseca-Neto, C. Romero and S. P. G. Martinez | Scalar torsion and a new symmetry of general relativity | 28 pages. arXiv admin note: text overlap with arXiv:1201.1469 | null | 10.1007/s10714-013-1553-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reformulate the general theory of relativity in the language of
Riemann-Cartan geometry. We start from the assumption that the space-time can
be described as a non-Riemannian manifold, which, in addition to the metric
field, is endowed with torsion. In this new framework, the gravitational field
is represented not... | [
{
"created": "Wed, 7 Nov 2012 14:20:48 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Fonseca-Neto",
"J. B.",
""
],
[
"Romero",
"C.",
""
],
[
"Martinez",
"S. P. G.",
""
]
] | We reformulate the general theory of relativity in the language of Riemann-Cartan geometry. We start from the assumption that the space-time can be described as a non-Riemannian manifold, which, in addition to the metric field, is endowed with torsion. In this new framework, the gravitational field is represented not o... |
2407.13867 | James T. Wheeler | James T. Wheeler | Nonmetricity and Poincare gauge gravity | 11 pages plus citations | null | null | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by-sa/4.0/ | We show that in a spacetime geometry with general connection, there exist
field redefinitions that replace the mixed-symmetry nonmetricity of the
asymmetric connection with the sum of torsion and the field strength of special
conformal transformations of a Lorentzian connection. In contrast to general
relativity, gen... | [
{
"created": "Thu, 18 Jul 2024 19:25:17 GMT",
"version": "v1"
}
] | 2024-07-22 | [
[
"Wheeler",
"James T.",
""
]
] | We show that in a spacetime geometry with general connection, there exist field redefinitions that replace the mixed-symmetry nonmetricity of the asymmetric connection with the sum of torsion and the field strength of special conformal transformations of a Lorentzian connection. In contrast to general relativity, gener... |
1701.07700 | Manuel Hohmann | Manuel Hohmann | Post-Newtonian parameter $\gamma$ and the deflection of light in
ghost-free massive bimetric gravity | 36 pages, 1 figure; journal version | Phys. Rev. D 95, 124049 (2017) | 10.1103/PhysRevD.95.124049 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the parametrized post-Newtonian (PPN) limit of ghost-free massive
bimetric gravity with two mutually non-interacting matter sectors coupled to
the two metrics. Making use of a gauge-invariant differential decomposition of
the metric perturbations, we solve the field equations up to the linear PPN
order fo... | [
{
"created": "Thu, 26 Jan 2017 13:52:16 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jul 2017 20:15:33 GMT",
"version": "v2"
}
] | 2017-07-14 | [
[
"Hohmann",
"Manuel",
""
]
] | We consider the parametrized post-Newtonian (PPN) limit of ghost-free massive bimetric gravity with two mutually non-interacting matter sectors coupled to the two metrics. Making use of a gauge-invariant differential decomposition of the metric perturbations, we solve the field equations up to the linear PPN order for ... |
0805.3834 | Hwei-Jang Yo | Kun-Feng Shie, James M. Nester, Hwei-Jang Yo | Torsion Cosmology and the Accelerating Universe | 16 pages, 4 figures, accepted by PRD | Phys.Rev.D78:023522,2008 | 10.1103/PhysRevD.78.023522 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Investigations of the dynamic modes of the Poincare gauge theory of gravity
found only two good propagating torsion modes; they are effectively a scalar
and a pseudoscalar. Cosmology affords a natural situation where one might see
observational effects of these modes. Here we consider only the ``scalar
torsion'' mode... | [
{
"created": "Sun, 25 May 2008 15:25:34 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Shie",
"Kun-Feng",
""
],
[
"Nester",
"James M.",
""
],
[
"Yo",
"Hwei-Jang",
""
]
] | Investigations of the dynamic modes of the Poincare gauge theory of gravity found only two good propagating torsion modes; they are effectively a scalar and a pseudoscalar. Cosmology affords a natural situation where one might see observational effects of these modes. Here we consider only the ``scalar torsion'' mode. ... |
1701.07804 | Andrzej Rostworowski | Andrzej Rostworowski | Higher order perturbations of Anti-de Sitter space and time-periodic
solutions of vacuum Einstein equations | 16 pages, v2: minor changes / corrections in text and equations; in
particular missing $\theta$ dependence in eqs. (110,111,114,117,120) added
(thanks to Gyula Fodor for pointing it out!), misprints in eqs. (28,55)
corrected, implicit limits in the integrals in eqs. (71-73,77-81,95-97) made
explicit, misplaced ... | Phys. Rev. D 95, 124043 (2017) | 10.1103/PhysRevD.95.124043 | CERN-TH-2017-023 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the problem of stability of Anti-de Sitter (AdS) spacetime, we
discuss nonlinear gravitational perturbations of maximally symmetric solutions
of vacuum Einstein equations in general and the case of AdS in particular. We
present the evidence that, similarly to the self-gravitating scalar field at
spherica... | [
{
"created": "Thu, 26 Jan 2017 18:22:53 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Mar 2017 10:27:44 GMT",
"version": "v2"
}
] | 2017-07-05 | [
[
"Rostworowski",
"Andrzej",
""
]
] | Motivated by the problem of stability of Anti-de Sitter (AdS) spacetime, we discuss nonlinear gravitational perturbations of maximally symmetric solutions of vacuum Einstein equations in general and the case of AdS in particular. We present the evidence that, similarly to the self-gravitating scalar field at spherical ... |
1405.4967 | Dawood Kothawala Dr. | Dawood Kothawala, T. Padmanabhan | Grin of the Cheshire cat: Entropy density of spacetime as a relic from
quantum gravity | v3: minor corrections; matches version accepted in Phys. Rev. D | Phys. Rev. D 90, 124060 (2014) | 10.1103/PhysRevD.90.124060 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is considerable evidence to suggest that the field equations of gravity
have the same status as, say, the equations describing an emergent phenomenon
like elasticity. In fact, it is possible to derive the field equations from a
thermodynamic variational principle in which a set of normalized vector fields
are v... | [
{
"created": "Tue, 20 May 2014 06:46:19 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Jun 2014 18:54:25 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Dec 2014 06:21:32 GMT",
"version": "v3"
}
] | 2014-12-24 | [
[
"Kothawala",
"Dawood",
""
],
[
"Padmanabhan",
"T.",
""
]
] | There is considerable evidence to suggest that the field equations of gravity have the same status as, say, the equations describing an emergent phenomenon like elasticity. In fact, it is possible to derive the field equations from a thermodynamic variational principle in which a set of normalized vector fields are var... |
2203.11671 | Zhong-Wen Feng | Zhong-Wen Feng, Xia Zhou, Shi-Qi Zhou | Higher-order generalized uncertainty principle applied to gravitational
baryogenesis | 16 pages, 1 figure | Journal of Cosmology and Astroparticle Physics, 2022, 06: 022 | 10.1088/1475-7516/2022/06/022 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The gravitational baryogenesis plays an important role in the study of the
baryon asymmetry. However, the original mechanism of gravitational baryogenesis
in the radiation dominated era leads to the asymmetry factor $\eta$ is equal to
zero, which indicates this mechanism may not generate a sufficient baryon
asymmetry... | [
{
"created": "Mon, 21 Mar 2022 11:59:48 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Mar 2022 11:21:18 GMT",
"version": "v2"
},
{
"created": "Sat, 9 Jul 2022 08:54:36 GMT",
"version": "v3"
}
] | 2022-07-12 | [
[
"Feng",
"Zhong-Wen",
""
],
[
"Zhou",
"Xia",
""
],
[
"Zhou",
"Shi-Qi",
""
]
] | The gravitational baryogenesis plays an important role in the study of the baryon asymmetry. However, the original mechanism of gravitational baryogenesis in the radiation dominated era leads to the asymmetry factor $\eta$ is equal to zero, which indicates this mechanism may not generate a sufficient baryon asymmetry f... |
1103.0731 | Steffen Gielen | Steffen Gielen | Geometric Aspects of Gauge and Spacetime Symmetries | Ph.D. Thesis, University of Cambridge (Supervisor: Prof. Gary W.
Gibbons), 180 pages, 3 figures; originally submitted in October 2010 | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate several problems in relativity and particle physics where
symmetries play a central role; in all cases geometric properties of Lie groups
and their quotients are related to physical effects. The first part is
concerned with symmetries in gravity. We apply the theory of Lie group
deformations to isometr... | [
{
"created": "Thu, 3 Mar 2011 16:53:52 GMT",
"version": "v1"
}
] | 2011-03-04 | [
[
"Gielen",
"Steffen",
""
]
] | We investigate several problems in relativity and particle physics where symmetries play a central role; in all cases geometric properties of Lie groups and their quotients are related to physical effects. The first part is concerned with symmetries in gravity. We apply the theory of Lie group deformations to isometry ... |
0808.1971 | Claudio Perini | Emanuele Alesci, Eugenio Bianchi, Elena Magliaro, Claudio Perini | Intertwiner dynamics in the flipped vertex | 12 pages, 7 figures | Class.Quant.Grav.26:185003,2009 | 10.1088/0264-9381/26/18/185003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We continue the semiclassical analysis, started in a previous paper, of the
intertwiner sector of the flipped vertex spinfoam model. We use independently
both a semi-analytical and a purely numerical approach, finding the correct
behavior of wave packet propagation and physical expectation values. In the
end, we show... | [
{
"created": "Thu, 14 Aug 2008 15:24:52 GMT",
"version": "v1"
}
] | 2009-09-28 | [
[
"Alesci",
"Emanuele",
""
],
[
"Bianchi",
"Eugenio",
""
],
[
"Magliaro",
"Elena",
""
],
[
"Perini",
"Claudio",
""
]
] | We continue the semiclassical analysis, started in a previous paper, of the intertwiner sector of the flipped vertex spinfoam model. We use independently both a semi-analytical and a purely numerical approach, finding the correct behavior of wave packet propagation and physical expectation values. In the end, we show p... |
2212.13745 | Philippe G. LeFloch | Philippe G. LeFloch, Filipe C. Mena, and The-Cang Nguyen | Global evolution in spherical symmetry for self-gravitating massive
fields | 43 pages | null | null | null | gr-qc math.AP | http://creativecommons.org/licenses/by/4.0/ | We are interested in the global dynamics of a massive scalar field evolving
under its own gravitational field and, in this paper, we study spherically
symmetric solutions to Einstein's field equations coupled with a Klein-Gordon
equation with quadratic potential. For the initial value problem we establish a
global ex... | [
{
"created": "Wed, 28 Dec 2022 08:43:39 GMT",
"version": "v1"
}
] | 2022-12-29 | [
[
"LeFloch",
"Philippe G.",
""
],
[
"Mena",
"Filipe C.",
""
],
[
"Nguyen",
"The-Cang",
""
]
] | We are interested in the global dynamics of a massive scalar field evolving under its own gravitational field and, in this paper, we study spherically symmetric solutions to Einstein's field equations coupled with a Klein-Gordon equation with quadratic potential. For the initial value problem we establish a global exis... |
0710.4299 | Roh Suan Tung | Roh-Suan Tung | Stationary untrapped boundary conditions in general relativity | 11 pages, improved discussion section, a reference added, accepted
for publication in Classical and Quantum Gravity | Class.Quant.Grav.25:085005,2008 | 10.1088/0264-9381/25/8/085005 | null | gr-qc | null | A class of boundary conditions for canonical general relativity are proposed
and studied at the quasi-local level. It is shown that for untrapped or
marginal surfaces, fixing the area element on the 2-surface (rather than the
induced 2-metric) and the angular momentum surface density is enough to have a
functionally ... | [
{
"created": "Tue, 23 Oct 2007 18:55:11 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Feb 2008 07:58:42 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Tung",
"Roh-Suan",
""
]
] | A class of boundary conditions for canonical general relativity are proposed and studied at the quasi-local level. It is shown that for untrapped or marginal surfaces, fixing the area element on the 2-surface (rather than the induced 2-metric) and the angular momentum surface density is enough to have a functionally di... |
gr-qc/9511047 | null | M. Farhoudi | Classical Trace Anomaly | Version 2: 21 pages, TeX file (using phyzzx.tex), added new section
and references. Version 3: Just replaced Abstract | Int.J.Mod.Phys. D14 (2005) 1233 | 10.1142/S0218271805006730 | QMW-PH-95-41 | gr-qc hep-th | null | We seek an analogy of the mathematical form of the alternative form of
Einstein's field equations for Lovelock's field equations. We find that the
price for this analogy is to accept the existence of the trace anomaly of the
energy-momentum tensor even in classical treatments. As an example, we take
this analogy to a... | [
{
"created": "Thu, 16 Nov 1995 20:24:57 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Sep 2005 18:02:45 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Nov 2005 08:41:45 GMT",
"version": "v3"
}
] | 2009-10-28 | [
[
"Farhoudi",
"M.",
""
]
] | We seek an analogy of the mathematical form of the alternative form of Einstein's field equations for Lovelock's field equations. We find that the price for this analogy is to accept the existence of the trace anomaly of the energy-momentum tensor even in classical treatments. As an example, we take this analogy to any... |
1110.1941 | Mercedes Martin-Benito | M Mart\'in-Benito, L J Garay, G A Mena Marug\'an, and E. Wilson-Ewing | Loop quantum cosmology of the Bianchi I model: complete quantization | 4 pages, Proceedings of Loops'11, Madrid, to appear in Journal of
Physics: Conference Series (JPCS) | J.Phys.Conf.Ser.360:012031,2012 | 10.1088/1742-6596/360/1/012031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We complete the canonical quantization of the vacuum Bianchi I model within
the improved dynamics scheme of loop quantum cosmology, characterizing the
Hilbert structure of the physical states and providing a complete set of
observables acting on them. In order to achieve this task, it has been
essential to determine ... | [
{
"created": "Mon, 10 Oct 2011 06:53:55 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Martín-Benito",
"M",
""
],
[
"Garay",
"L J",
""
],
[
"Marugán",
"G A Mena",
""
],
[
"Wilson-Ewing",
"E.",
""
]
] | We complete the canonical quantization of the vacuum Bianchi I model within the improved dynamics scheme of loop quantum cosmology, characterizing the Hilbert structure of the physical states and providing a complete set of observables acting on them. In order to achieve this task, it has been essential to determine th... |
gr-qc/0309020 | Matteo Luca Ruggiero | Matteo Luca Ruggiero | The Relative Space: Space Measurements on a Rotating Platform | 14 pages, 2 EPS figures, LaTeX, to appear in the European Journal of
Physics | Eur.J.Phys.24:563-573,2003 | 10.1088/0143-0807/24/6/002 | null | gr-qc | null | We introduce here the concept of relative space, an extended 3-space which is
recognized as the only space having an operational meaning in the study of the
space geometry of a rotating disk. Accordingly, we illustrate how space
measurements are performed in the relative space, and we show that an old-aged
puzzling p... | [
{
"created": "Wed, 3 Sep 2003 13:45:11 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ruggiero",
"Matteo Luca",
""
]
] | We introduce here the concept of relative space, an extended 3-space which is recognized as the only space having an operational meaning in the study of the space geometry of a rotating disk. Accordingly, we illustrate how space measurements are performed in the relative space, and we show that an old-aged puzzling pro... |
1001.0444 | Kourosh Nozari | Kourosh Nozari and M. Shoukrani | Nonminimal Inflation on the Randall-Sundrum II Brane with Induced
Gravity | 15 pages, 5 figures | Mod.Phys.Lett.A24:3205-3217,2009 | 10.1142/S0217732309031132 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study an inflation model that inflaton field is non-minimally coupled to
the induced scalar curvature on the Randall-Sundrum (RS) II brane. We
investigate the effects of the non-minimal coupling on the inflationary
dynamics of this braneworld model. Our study shows that the number of e-folds
decreases by increasin... | [
{
"created": "Mon, 4 Jan 2010 05:51:20 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Nozari",
"Kourosh",
""
],
[
"Shoukrani",
"M.",
""
]
] | We study an inflation model that inflaton field is non-minimally coupled to the induced scalar curvature on the Randall-Sundrum (RS) II brane. We investigate the effects of the non-minimal coupling on the inflationary dynamics of this braneworld model. Our study shows that the number of e-folds decreases by increasing ... |
1910.01088 | David Vasak | David Vasak, Johannes Kirsch and Juergen Struckmeier | Dark energy and inflation invoked in CCGG by locally contorted
space-time | Correction of sign errors, Eqs. (18-20), with no impact on results.
23 pages + 3 appendices, 38 figures, 2 tables | The European Physical Journal Plus 2020 | 10.1140/epjp/s13360-020-00415-7 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmological implications of the Covariant Canonical Gauge Theory of
Gravity (CCGG) are investigated. We deduce that, in a metric compatible
geometry, the requirement of covariant conservation of matter invokes torsion
of space-time. In the Friedman model this leads to a scalar field built from
contortion and the... | [
{
"created": "Wed, 2 Oct 2019 17:08:47 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Feb 2020 12:09:34 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Nov 2023 15:30:29 GMT",
"version": "v3"
}
] | 2023-11-27 | [
[
"Vasak",
"David",
""
],
[
"Kirsch",
"Johannes",
""
],
[
"Struckmeier",
"Juergen",
""
]
] | The cosmological implications of the Covariant Canonical Gauge Theory of Gravity (CCGG) are investigated. We deduce that, in a metric compatible geometry, the requirement of covariant conservation of matter invokes torsion of space-time. In the Friedman model this leads to a scalar field built from contortion and the m... |
2312.11659 | Justin Ripley | Justin L. Ripley and Abhishek Hegade K.R. and Rohit S. Chandramouli
and and Nicolas Yunes | First constraint on the dissipative tidal deformability of neutron stars | 7 pages, 4 figures; edits in response to referee comments | null | 10.1038/s41550-024-02323-7 | null | gr-qc astro-ph.HE nucl-ex nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational waves (GWs) emitted by neutron star binaries probe the
physics of matter at supra nuclear densities. During the late inspiral, tidal
deformations raised on each star by the gravitational field of its companion
depend crucially on the star's internal properties. The misalignment of a
star's tidal bul... | [
{
"created": "Mon, 18 Dec 2023 19:13:05 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jun 2024 22:24:00 GMT",
"version": "v2"
}
] | 2024-07-22 | [
[
"Ripley",
"Justin L.",
""
],
[
"R.",
"Abhishek Hegade K.",
""
],
[
"Chandramouli",
"Rohit S.",
""
],
[
"Yunes",
"and Nicolas",
""
]
] | The gravitational waves (GWs) emitted by neutron star binaries probe the physics of matter at supra nuclear densities. During the late inspiral, tidal deformations raised on each star by the gravitational field of its companion depend crucially on the star's internal properties. The misalignment of a star's tidal bulge... |
1309.4049 | Jutta Kunz | Jutta Kunz | Black Holes in Higher Dimensions (Black Strings and Black Rings) | Summary of session BH1 at MG13 in Stockholm, 14 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main focus of this session was the presentation of new higher-dimensional
black hole solutions, including black rings, black strings, and multi black
holes, and the study of their properties. Besides new asymptotically flat and
locally asymptotically flat black objects also new black holes with anti-de
Sitter asy... | [
{
"created": "Mon, 16 Sep 2013 17:49:58 GMT",
"version": "v1"
}
] | 2013-09-17 | [
[
"Kunz",
"Jutta",
""
]
] | The main focus of this session was the presentation of new higher-dimensional black hole solutions, including black rings, black strings, and multi black holes, and the study of their properties. Besides new asymptotically flat and locally asymptotically flat black objects also new black holes with anti-de Sitter asymp... |
2310.19037 | Julio Cesar Fabris | J\'ulio C. Fabris, Mahamadou Hamani Daouda, Hermano Velten | Spherically Symmetric Configurations in Unimodular Gravity | 12 pages, latex file | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | Unimodular gravity (UG) is considered, under many aspects, equivalent to
General Relativity (GR), even if the theory is invariant under a more
restricted diffeomorphic class of transformations. We discuss the conditions
for the equivalence between the two formulations by applying the UG to the
static and spherically ... | [
{
"created": "Sun, 29 Oct 2023 15:04:06 GMT",
"version": "v1"
}
] | 2023-10-31 | [
[
"Fabris",
"Júlio C.",
""
],
[
"Daouda",
"Mahamadou Hamani",
""
],
[
"Velten",
"Hermano",
""
]
] | Unimodular gravity (UG) is considered, under many aspects, equivalent to General Relativity (GR), even if the theory is invariant under a more restricted diffeomorphic class of transformations. We discuss the conditions for the equivalence between the two formulations by applying the UG to the static and spherically sy... |
2207.07193 | Oleksii Sokoliuk | Oleksii Sokoliuk, Subhrat Praharaj, Alexander Baransky and P. K. Sahoo | Accretion flows around exotic tidal wormholes I. Ray-tracing | 18 pages, 14 figures, revision submitted to A&A | A&A 665, A139 (2022) | 10.1051/0004-6361/202244358 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | This paper investigates the various spherically symmetric wormhole solutions
in the presence of tidal forces and applies numerous methods, such as test
particle orbital dynamics, ray-tracing and microlensing. We make the
theoretical predictions on the test particle orbital motion around the tidal
wormholes with the u... | [
{
"created": "Thu, 30 Jun 2022 15:47:18 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Jul 2022 10:51:45 GMT",
"version": "v2"
}
] | 2022-09-21 | [
[
"Sokoliuk",
"Oleksii",
""
],
[
"Praharaj",
"Subhrat",
""
],
[
"Baransky",
"Alexander",
""
],
[
"Sahoo",
"P. K.",
""
]
] | This paper investigates the various spherically symmetric wormhole solutions in the presence of tidal forces and applies numerous methods, such as test particle orbital dynamics, ray-tracing and microlensing. We make the theoretical predictions on the test particle orbital motion around the tidal wormholes with the use... |
1503.04775 | Alan Coley | A. Coley | On the Action, Topology and Geometric Invariants in Quantum Gravity | Based on recent talk | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The action in general relativity (GR), which is an integral over the manifold
plus an integral over the boundary, is a global object and is only well defined
when the topology is fixed. Therefore, to use the action in GR and in most
approaches to quantum gravity (QG) based on a covariant Lorentzian action,
there need... | [
{
"created": "Mon, 16 Mar 2015 19:17:27 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Coley",
"A.",
""
]
] | The action in general relativity (GR), which is an integral over the manifold plus an integral over the boundary, is a global object and is only well defined when the topology is fixed. Therefore, to use the action in GR and in most approaches to quantum gravity (QG) based on a covariant Lorentzian action, there needs ... |
2204.06633 | Jean-Baptiste Bayle | Michael L. Katz, Jean-Baptiste Bayle, Alvin J. K. Chua, Michele
Vallisneri | Assessing the data-analysis impact of LISA orbit approximations using a
GPU-accelerated response model | 15 pages, 7 figures, 2 tables | Phys. Rev. D 106, 103001 (2022) | 10.1103/PhysRevD.106.103001 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The analysis of gravitational wave (GW) datasets is based on the comparison
of measured time series with theoretical templates of the detector's response
to a variety of source parameters. For LISA, the main scientific observables
will be the so-called time-delay interferometry (TDI) combinations, which
suppress the ... | [
{
"created": "Wed, 13 Apr 2022 20:53:00 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Apr 2022 13:18:44 GMT",
"version": "v2"
},
{
"created": "Thu, 1 Sep 2022 07:54:11 GMT",
"version": "v3"
}
] | 2022-11-02 | [
[
"Katz",
"Michael L.",
""
],
[
"Bayle",
"Jean-Baptiste",
""
],
[
"Chua",
"Alvin J. K.",
""
],
[
"Vallisneri",
"Michele",
""
]
] | The analysis of gravitational wave (GW) datasets is based on the comparison of measured time series with theoretical templates of the detector's response to a variety of source parameters. For LISA, the main scientific observables will be the so-called time-delay interferometry (TDI) combinations, which suppress the ot... |
2011.02524 | Cesar Daniel Peralta Gonzalez | C. D. Peralta | Study of General Relativity and $f(R)$ Modified Gravity with
Cosmological Constant for Einstein and Jordan Frames | Phd thesis (2020) | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This thesis investigates a toy model for inflation in a class of modified
theories of gravity in the metric formalism. Instead of the standard procedure
-- assuming a non-linear Lagrangian $f(R)$ in the Jordan frame -- we start from
a simple {\phi}^2 potential in the Einstein frame and investigate the
corresponding $... | [
{
"created": "Wed, 4 Nov 2020 20:14:17 GMT",
"version": "v1"
}
] | 2020-11-06 | [
[
"Peralta",
"C. D.",
""
]
] | This thesis investigates a toy model for inflation in a class of modified theories of gravity in the metric formalism. Instead of the standard procedure -- assuming a non-linear Lagrangian $f(R)$ in the Jordan frame -- we start from a simple {\phi}^2 potential in the Einstein frame and investigate the corresponding $f(... |
2107.10341 | Iver Brevik | I. Brevik, K. Myrzakulov, A. V. Timoshkin and A. Zhadyranova | Viscous coupled fluids in terms of a log-corrected equation of state | 15 pages latex, author list corrected. To appear in Int. J. Geom.
Meth. Mod. Phys | Int. J. Geom. Meth. Mod. Phys. (2021) 2150198 | 10.1142/S021988782150198X | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider a class of cosmological fluids that possess properties analogous
to those of crystalline solids undergoing isotropic deformations. Our research
is based on a modified log-corrected power-law equation of state in the
presence of a bulk viscosity. This formalism represents a class of so-called
logotropic fl... | [
{
"created": "Wed, 21 Jul 2021 20:11:44 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Aug 2021 13:50:13 GMT",
"version": "v2"
}
] | 2021-08-23 | [
[
"Brevik",
"I.",
""
],
[
"Myrzakulov",
"K.",
""
],
[
"Timoshkin",
"A. V.",
""
],
[
"Zhadyranova",
"A.",
""
]
] | We consider a class of cosmological fluids that possess properties analogous to those of crystalline solids undergoing isotropic deformations. Our research is based on a modified log-corrected power-law equation of state in the presence of a bulk viscosity. This formalism represents a class of so-called logotropic flui... |
gr-qc/9707026 | Paul Anderson | Paul R. Anderson and Courtney D. Mull | Constraints on Black Holes in Classical and Semiclassical Theories of
Gravity | 7 pages, ReVTeX | null | null | null | gr-qc | null | Constraints on the geometry of a static spherically symmetric black hole are
obtained by requiring the spacetime curvature to be analytic at the event
horizon. For a zero temperature black hole further constraints are obtained by
also requiring that the semiclassical trace equation be satisfied when
conformally invar... | [
{
"created": "Fri, 11 Jul 1997 13:59:59 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Anderson",
"Paul R.",
""
],
[
"Mull",
"Courtney D.",
""
]
] | Constraints on the geometry of a static spherically symmetric black hole are obtained by requiring the spacetime curvature to be analytic at the event horizon. For a zero temperature black hole further constraints are obtained by also requiring that the semiclassical trace equation be satisfied when conformally invaria... |
2202.01900 | Miko{\l}aj Myszkowski Mr | Miko{\l}aj Myszkowski | Atom interferometers and a small-scale test of general relativity | 28 pages, 6 figures | null | 10.1007/s10714-022-03012-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Since the first appearance of general relativity in 1916, various experiments
have been conducted to test the theory. Due to the weakness of the interactions
involved, all of the documented tests were carried out in a gravitational field
generated by objects of an astronomical scale. We propose an idea for an
experim... | [
{
"created": "Thu, 3 Feb 2022 23:04:19 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Feb 2022 11:15:52 GMT",
"version": "v2"
},
{
"created": "Fri, 8 Apr 2022 19:21:39 GMT",
"version": "v3"
},
{
"created": "Fri, 16 Sep 2022 11:40:28 GMT",
"version": "v4"
}
] | 2022-11-30 | [
[
"Myszkowski",
"Mikołaj",
""
]
] | Since the first appearance of general relativity in 1916, various experiments have been conducted to test the theory. Due to the weakness of the interactions involved, all of the documented tests were carried out in a gravitational field generated by objects of an astronomical scale. We propose an idea for an experimen... |
gr-qc/0103109 | Nina Jansen | Nina Jansen, Peter Diener, Alexei Khokhlov, Igor Novikov | Local and global properties of conformally flat initial data for black
hole collisions | null | Class.Quant.Grav. 20 (2003) 51-74 | 10.1088/0264-9381/20/1/304 | null | gr-qc | null | We study physical properties of conformal initial value data for single and
binary black hole configurations obtained using conformal-imaging and
conformal-puncture methods. We investigate how the total mass M_tot of a
dataset with two black holes depends on the configuration of linear or angular
momentum and separat... | [
{
"created": "Thu, 29 Mar 2001 10:28:34 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Jansen",
"Nina",
""
],
[
"Diener",
"Peter",
""
],
[
"Khokhlov",
"Alexei",
""
],
[
"Novikov",
"Igor",
""
]
] | We study physical properties of conformal initial value data for single and binary black hole configurations obtained using conformal-imaging and conformal-puncture methods. We investigate how the total mass M_tot of a dataset with two black holes depends on the configuration of linear or angular momentum and separatio... |
1909.10382 | Sam S. C. Wong | Lam Hui, Daniel Kabat and Sam S. C. Wong | Quasinormal modes, echoes and the causal structure of the Green's
function | 23 pages, 5 figures | null | 10.1088/1475-7516/2019/12/020 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasinormal modes describe the return to equilibrium of a perturbed system,
in particular the ringdown phase of a black hole merger. But as
globally-defined quantities, the quasinormal spectrum can be highly sensitive
to global structure, including distant small perturbations to the potential. In
what sense are quasi... | [
{
"created": "Mon, 23 Sep 2019 14:20:30 GMT",
"version": "v1"
}
] | 2019-12-18 | [
[
"Hui",
"Lam",
""
],
[
"Kabat",
"Daniel",
""
],
[
"Wong",
"Sam S. C.",
""
]
] | Quasinormal modes describe the return to equilibrium of a perturbed system, in particular the ringdown phase of a black hole merger. But as globally-defined quantities, the quasinormal spectrum can be highly sensitive to global structure, including distant small perturbations to the potential. In what sense are quasino... |
2405.11334 | Rubens R. S. Oliveira | R. R. S. Oliveira | Dirac fermions in a spinning conical G\"odel-type spacetime | 14 pages, 6 figures. arXiv admin note: text overlap with
arXiv:2402.15720 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we determine the relativistic and nonrelativistic energy
levels for Dirac fermions in a spinning conical G\"odel-type spacetime in
$(2+1)$-dimensions, where we work with the curved Dirac equation in polar
coordinates and we use the tetrads formalism. Solving a second-order
differential equation for the... | [
{
"created": "Sat, 18 May 2024 16:46:27 GMT",
"version": "v1"
}
] | 2024-05-21 | [
[
"Oliveira",
"R. R. S.",
""
]
] | In this paper, we determine the relativistic and nonrelativistic energy levels for Dirac fermions in a spinning conical G\"odel-type spacetime in $(2+1)$-dimensions, where we work with the curved Dirac equation in polar coordinates and we use the tetrads formalism. Solving a second-order differential equation for the t... |
2209.12455 | Jing-Bo Wang | Jingbo Wang | The topological entanglement entropy of black holes in loop quantum
gravity | This paper will be extended by the paper 2303.15760 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Topological order (long-range entanglement) play important role in modern
condensed matter physics. In this paper, we will show that the four dimensional
black hole can also have topological order, by showing that the topological
entanglement entropy is non-zero. The properties of the topological order show
that the ... | [
{
"created": "Mon, 26 Sep 2022 06:52:43 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Dec 2023 07:59:46 GMT",
"version": "v2"
}
] | 2023-12-06 | [
[
"Wang",
"Jingbo",
""
]
] | Topological order (long-range entanglement) play important role in modern condensed matter physics. In this paper, we will show that the four dimensional black hole can also have topological order, by showing that the topological entanglement entropy is non-zero. The properties of the topological order show that the la... |
2204.11810 | Giovanni Camelio | Giovanni Camelio, Lorenzo Gavassino, Marco Antonelli, Sebastiano
Bernuzzi, Brynmor Haskell | Simulating bulk viscosity in neutron stars. II. Evolution in spherical
symmetry | 23 pages, 16 figures, 3 appendices, 5 tables. Code published on
zenodo with DOI:10.5281/zenodo.6478022 | Phys. Rev. D 107, 103032 (2023) | 10.1103/PhysRevD.107.103032 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Out-of-equilibrium reactions between different particle species are the main
processes contributing to bulk viscosity in neutron stars. In this work, we
numerically compare three different approaches to the modeling of bulk
viscosity: the multi-component fluid with reacting particle species and two
bulk stress formal... | [
{
"created": "Mon, 25 Apr 2022 17:36:13 GMT",
"version": "v1"
},
{
"created": "Fri, 19 May 2023 18:28:06 GMT",
"version": "v2"
}
] | 2023-05-23 | [
[
"Camelio",
"Giovanni",
""
],
[
"Gavassino",
"Lorenzo",
""
],
[
"Antonelli",
"Marco",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Haskell",
"Brynmor",
""
]
] | Out-of-equilibrium reactions between different particle species are the main processes contributing to bulk viscosity in neutron stars. In this work, we numerically compare three different approaches to the modeling of bulk viscosity: the multi-component fluid with reacting particle species and two bulk stress formalis... |
1410.4190 | Alejandro Cardenas Avendano | Carlos A. Benavides, Alejandro Cardenas-Avendano, Alexis Larranaga | Gravitational lensing in the strong field limit for Kar's metric | v3: 18 pages, 5 figures, references and an Appendix added | International Journal of Theoretical Physics Volume 55, Issue 4 ,
pp 2219-2236, 2016 | 10.1007/s10773-015-2861-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we calculate the strong field limit deflection angle for a
light ray passing near a scalar charged spherically symmetric object, described
by a metric which comes from the low-energy limit of heterotic string theory.
Then, we compare the expansion parameters of our results with those obtained in
the Ein... | [
{
"created": "Wed, 15 Oct 2014 17:19:36 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Oct 2014 04:44:36 GMT",
"version": "v2"
},
{
"created": "Mon, 19 Oct 2015 01:15:50 GMT",
"version": "v3"
}
] | 2016-03-15 | [
[
"Benavides",
"Carlos A.",
""
],
[
"Cardenas-Avendano",
"Alejandro",
""
],
[
"Larranaga",
"Alexis",
""
]
] | In this paper we calculate the strong field limit deflection angle for a light ray passing near a scalar charged spherically symmetric object, described by a metric which comes from the low-energy limit of heterotic string theory. Then, we compare the expansion parameters of our results with those obtained in the Einst... |
2012.10184 | Eric Poisson | Eric Poisson | Compact body in a tidal environment: New types of relativistic Love
numbers, and a post-Newtonian operational definition for tidally induced
multipole moments | 62 pages, 1 figure. New appendix. This version matches the published
article | Phys. Rev. D 103, 064023 (2021) | 10.1103/PhysRevD.103.064023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the tidal deformation of a nonrotating compact body (material body
or black hole) in general relativity. The body's exterior metric is calculated
in a simultaneous expansion in powers of the ratio between the distance to the
body and three distinct length scales: the radius of curvature of the external
spa... | [
{
"created": "Fri, 18 Dec 2020 12:07:08 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Mar 2021 18:39:48 GMT",
"version": "v2"
}
] | 2021-03-24 | [
[
"Poisson",
"Eric",
""
]
] | We examine the tidal deformation of a nonrotating compact body (material body or black hole) in general relativity. The body's exterior metric is calculated in a simultaneous expansion in powers of the ratio between the distance to the body and three distinct length scales: the radius of curvature of the external space... |
2210.00133 | Marko Vojinovic | Nikola Paunkovic and Marko Vojinovic | Equivalence Principle in Classical and Quantum Gravity | v2: published version, 7+6 pages | Universe 8, 598 (2022) | 10.3390/universe8110598 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a general overview of various flavors of the equivalence principle in
classical and quantum physics, with special emphasis on the so-called weak
equivalence principle, and contrast its validity in mechanics versus field
theory. We also discuss its generalisation to a theory of quantum gravity. Our
analysis su... | [
{
"created": "Fri, 30 Sep 2022 23:10:49 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Nov 2022 02:14:20 GMT",
"version": "v2"
}
] | 2022-11-15 | [
[
"Paunkovic",
"Nikola",
""
],
[
"Vojinovic",
"Marko",
""
]
] | We give a general overview of various flavors of the equivalence principle in classical and quantum physics, with special emphasis on the so-called weak equivalence principle, and contrast its validity in mechanics versus field theory. We also discuss its generalisation to a theory of quantum gravity. Our analysis sugg... |
gr-qc/0309030 | Christos G. Tsagas | John D. Barrow (DAMTP), Christos G. Tsagas (UCT/DAMTP) | Godel brane | Revised version, to match paper published in Phys. Rev. D | Phys.Rev. D69 (2004) 064007 | 10.1103/PhysRevD.69.064007 | null | gr-qc astro-ph hep-th | null | We consider the brane-world generalisation of the Godel universe and analyse
its dynamical interaction with the bulk. The exact homogeneity of the standard
Godel spacetime no longer holds, unless the bulk is also static. We show how
the anisotropy of the Godel-type brane is dictated by that of the bulk and find
that ... | [
{
"created": "Fri, 5 Sep 2003 10:22:26 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Dec 2003 18:14:34 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Mar 2004 17:18:48 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Barrow",
"John D.",
"",
"DAMTP"
],
[
"Tsagas",
"Christos G.",
"",
"UCT/DAMTP"
]
] | We consider the brane-world generalisation of the Godel universe and analyse its dynamical interaction with the bulk. The exact homogeneity of the standard Godel spacetime no longer holds, unless the bulk is also static. We show how the anisotropy of the Godel-type brane is dictated by that of the bulk and find that th... |
gr-qc/0512047 | Claus Kiefer | Claus Kiefer, Jakob Mueller-Hill, Cenalo Vaz | Classical and quantum LTB model for the non-marginal case | 23 pages, no figures, typos corrected | Phys.Rev.D73:044025,2006 | 10.1103/PhysRevD.73.044025 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the classical and quantum treatment of the Lemaitre-Tolman-Bondi
(LTB) model to the non-marginal case (defined by the fact that the shells of
the dust cloud start with a non-vanishing velocity at infinity). We present the
classical canonical formalism and address with particular care the boundary
terms in t... | [
{
"created": "Wed, 7 Dec 2005 16:28:06 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Oct 2009 09:17:34 GMT",
"version": "v2"
}
] | 2009-10-05 | [
[
"Kiefer",
"Claus",
""
],
[
"Mueller-Hill",
"Jakob",
""
],
[
"Vaz",
"Cenalo",
""
]
] | We extend the classical and quantum treatment of the Lemaitre-Tolman-Bondi (LTB) model to the non-marginal case (defined by the fact that the shells of the dust cloud start with a non-vanishing velocity at infinity). We present the classical canonical formalism and address with particular care the boundary terms in the... |
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