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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1009.3974 | Paul Nation | P. D. Nation, M. P. Blencowe, and Franco Nori | Non-equilibrium Landauer Transport Model for Hawking radiation from a
Black Hole | 14 pages, 2 figures, published version | New J. Phys. 14, 033013 (2012) | 10.1088/1367-2630/14/3/033013 | null | gr-qc cond-mat.mes-hall quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose that the Hawking radiation energy and entropy flow rates from a
black hole can be viewed as a one-dimensional (1D), non-equilibrium Landauer
transport process. Support for this viewpoint comes from previous calculations
invoking conformal symmetry in the near-horizon region, which give radiation
rates that... | [
{
"created": "Tue, 21 Sep 2010 00:52:28 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jan 2011 00:45:40 GMT",
"version": "v2"
},
{
"created": "Mon, 23 May 2011 01:08:52 GMT",
"version": "v3"
},
{
"created": "Tue, 13 Mar 2012 00:09:13 GMT",
"version": "v4"
}
] | 2012-03-14 | [
[
"Nation",
"P. D.",
""
],
[
"Blencowe",
"M. P.",
""
],
[
"Nori",
"Franco",
""
]
] | We propose that the Hawking radiation energy and entropy flow rates from a black hole can be viewed as a one-dimensional (1D), non-equilibrium Landauer transport process. Support for this viewpoint comes from previous calculations invoking conformal symmetry in the near-horizon region, which give radiation rates that a... |
1312.7798 | Craig J. Hogan | Craig J. Hogan | Directional Entanglement of Quantum Fields with Quantum Geometry | 13 pages, 3 figures | null | null | FERMILAB-PUB-13-581-A | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is conjectured that the spatial structure of quantum field states is
influenced by a new kind of directional indeterminacy of quantum geometry set
by the Planck length, $l_P$, that does not occur in a classical background
geometry. Entanglement of fields with geometry modifies the transverse phase of
field states ... | [
{
"created": "Mon, 30 Dec 2013 17:59:01 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Jan 2014 21:42:20 GMT",
"version": "v2"
},
{
"created": "Sat, 25 Jan 2014 15:50:13 GMT",
"version": "v3"
},
{
"created": "Tue, 11 Mar 2014 15:53:27 GMT",
"version": "v4"
},
{
"c... | 2014-12-05 | [
[
"Hogan",
"Craig J.",
""
]
] | It is conjectured that the spatial structure of quantum field states is influenced by a new kind of directional indeterminacy of quantum geometry set by the Planck length, $l_P$, that does not occur in a classical background geometry. Entanglement of fields with geometry modifies the transverse phase of field states at... |
gr-qc/9412041 | Sardanashvily Gennadi | G.Sardanashvily (Moscow State University) | Energy-Momentum Conservation Laws in Hamiltonian Field Theory | 21 pp, LaTeX file | null | null | TP\94\246 | gr-qc hep-th | null | In the Lagrangian field theory, one gets different identities for different
stress energy-momentum tensors, e.g., canonical energy-momentum tensors.
Moreover, these identities are not conservation laws of the above-mentioned
energy-momentum tensors in general. In the framework of the multimomentum
Hamiltonian formali... | [
{
"created": "Wed, 14 Dec 1994 03:51:37 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sardanashvily",
"G.",
"",
"Moscow State University"
]
] | In the Lagrangian field theory, one gets different identities for different stress energy-momentum tensors, e.g., canonical energy-momentum tensors. Moreover, these identities are not conservation laws of the above-mentioned energy-momentum tensors in general. In the framework of the multimomentum Hamiltonian formalism... |
1909.07733 | Davood Mahdavian Yekta | Davood Mahdavian Yekta, S. A. Alavi, Majid Karimabadi | Gravitational measurements in higher dimensions | 22 pages, 10 figures and 2 tables, Accepted version | Galaxies 2021, 9, 4 | 10.3390/galaxies9010004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We attempt to study three significant tests of general relativity in higher
dimensions both in commutative and non-commutative spaces. In the context of
non-commutative geometry, we will consider a solution of the Einstein equation
in higher dimensions with a source given by a static, spherically symmetric
Gaussian d... | [
{
"created": "Tue, 17 Sep 2019 11:52:07 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Nov 2019 14:15:25 GMT",
"version": "v2"
},
{
"created": "Sun, 18 Oct 2020 18:55:40 GMT",
"version": "v3"
},
{
"created": "Tue, 5 Jan 2021 15:05:51 GMT",
"version": "v4"
}
] | 2021-05-04 | [
[
"Yekta",
"Davood Mahdavian",
""
],
[
"Alavi",
"S. A.",
""
],
[
"Karimabadi",
"Majid",
""
]
] | We attempt to study three significant tests of general relativity in higher dimensions both in commutative and non-commutative spaces. In the context of non-commutative geometry, we will consider a solution of the Einstein equation in higher dimensions with a source given by a static, spherically symmetric Gaussian dis... |
1912.03576 | Puxun Wu | Di Wu, Puxun Wu, Hongwei Yu, Shuang-Qing Wu | Notes on thermodynamics of super-entropic AdS black holes | 14 pages; to appear in PRD | null | 10.1103/PhysRevD.101.024057 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The super-entropic black hole, which possesses a noncompact horizon topology
and violates the reverse isoperimetric inequality, has been found to satisfy
both the thermodynamic first law and the Bekenstein-Smarr mass formula. In this
paper, we first derive a new Christodoulou-Ruffini-like squared-mass formula
for the... | [
{
"created": "Sat, 7 Dec 2019 23:28:12 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jan 2020 01:23:56 GMT",
"version": "v2"
}
] | 2020-02-05 | [
[
"Wu",
"Di",
""
],
[
"Wu",
"Puxun",
""
],
[
"Yu",
"Hongwei",
""
],
[
"Wu",
"Shuang-Qing",
""
]
] | The super-entropic black hole, which possesses a noncompact horizon topology and violates the reverse isoperimetric inequality, has been found to satisfy both the thermodynamic first law and the Bekenstein-Smarr mass formula. In this paper, we first derive a new Christodoulou-Ruffini-like squared-mass formula for the f... |
1108.1908 | Alessandro Codello | A. Codello | Large N Quantum Gravity | 19 pages, 1 figure, contribution published in "New Journal of Physics
Focus Issue on Quantum Einstein Gravity" | New J. Phys. 14 (2012) 015009 | 10.1088/1367-2630/14/1/015009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain the effective action of four dimensional quantum gravity, induced
by N massless matter fields, by integrating the RG flow of the relative
effective average action. By considering the leading approximation in the large
N limit, where one neglects the gravitational contributions with respect to the
matter con... | [
{
"created": "Tue, 9 Aug 2011 12:24:13 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Jan 2012 19:03:47 GMT",
"version": "v2"
}
] | 2012-12-18 | [
[
"Codello",
"A.",
""
]
] | We obtain the effective action of four dimensional quantum gravity, induced by N massless matter fields, by integrating the RG flow of the relative effective average action. By considering the leading approximation in the large N limit, where one neglects the gravitational contributions with respect to the matter contr... |
0804.1278 | Alexander Kaganovich B. | E. I. Guendelman and A. B. Kaganovich | Transition to Zero Cosmological Constant and Phantom Dark Energy as
Solutions Involving Change of Orientation of Space-Time Manifold | 24 pages, 5 figures, to appear in Class.Quant.Grav.; discussion of a
possibility of a strong gravity effect in LHC experiments added | Class.Quant.Grav.25:235015,2008 | 10.1088/0264-9381/25/23/235015 | null | gr-qc astro-ph hep-th | http://creativecommons.org/licenses/by/3.0/ | Solutions with degenerate metric ($det(g_{\mu\nu})=0$ or $g_{\mu\nu}=0$) in
the first order formalism (FOF) are physically acceptable: they may describe
topology changes (Horowitz) and reduction of "metrical dimension" (Tseytlin) of
space-time. The latter implies disappearance of the volume element
$\sqrt{-g}d^4x$ of... | [
{
"created": "Tue, 8 Apr 2008 13:57:06 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Apr 2008 12:07:24 GMT",
"version": "v2"
},
{
"created": "Tue, 28 Oct 2008 10:08:44 GMT",
"version": "v3"
}
] | 2008-12-18 | [
[
"Guendelman",
"E. I.",
""
],
[
"Kaganovich",
"A. B.",
""
]
] | Solutions with degenerate metric ($det(g_{\mu\nu})=0$ or $g_{\mu\nu}=0$) in the first order formalism (FOF) are physically acceptable: they may describe topology changes (Horowitz) and reduction of "metrical dimension" (Tseytlin) of space-time. The latter implies disappearance of the volume element $\sqrt{-g}d^4x$ of 4... |
gr-qc/0603024 | Daniela Mugnai | Daniela Mugnai | Superluminal behavior and the Minkowski space-time | 3 pages, 2 figures | Phys.Lett.A364:435-437,2007 | 10.1016/j.physleta.2006.11.096 | null | gr-qc | null | Bessel X-waves, or Bessel beams, have been extensively studied in last years,
especially with regard to the topic of superluminality in the propagation of a
signal. However, in spite of many efforts devoted to this subject, no definite
answer has been found, mainly for lack of an exact definition of signal
velocity. ... | [
{
"created": "Wed, 8 Mar 2006 11:25:06 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Mugnai",
"Daniela",
""
]
] | Bessel X-waves, or Bessel beams, have been extensively studied in last years, especially with regard to the topic of superluminality in the propagation of a signal. However, in spite of many efforts devoted to this subject, no definite answer has been found, mainly for lack of an exact definition of signal velocity. Th... |
2304.00984 | Shu-Min Wu | Shu-Min Wu, Xiao-Wei Fan, Rui-Di Wang, Hao-Yu Wu, Xiao-Li Huang,
Hao-Sheng Zeng | Does Hawking effect always degrade fidelity of quantum teleportation in
Schwarzschild spacetime? | 21 pages, 3 figures, accepted for publication in JHEP | null | null | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | Previous studies have shown that the Hawking effect always destroys quantum
correlations and the fidelity of quantum teleportation in the Schwarzschild
black hole. Here, we investigate the fidelity of quantum teleportation of Dirac
fields between users in Schwarzschild spacetime. We find that, with the
increase of th... | [
{
"created": "Mon, 3 Apr 2023 13:52:07 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Nov 2023 02:37:00 GMT",
"version": "v2"
}
] | 2023-11-30 | [
[
"Wu",
"Shu-Min",
""
],
[
"Fan",
"Xiao-Wei",
""
],
[
"Wang",
"Rui-Di",
""
],
[
"Wu",
"Hao-Yu",
""
],
[
"Huang",
"Xiao-Li",
""
],
[
"Zeng",
"Hao-Sheng",
""
]
] | Previous studies have shown that the Hawking effect always destroys quantum correlations and the fidelity of quantum teleportation in the Schwarzschild black hole. Here, we investigate the fidelity of quantum teleportation of Dirac fields between users in Schwarzschild spacetime. We find that, with the increase of the ... |
2311.17730 | Edward Teo | Edward Teo, Thomas Wan | Multi-centered rotating black holes in Kaluza-Klein theory | 19 pages, more details added to Sec. 4, published version | Phys. Rev. D 109, 044054 (2024) | 10.1103/PhysRevD.109.044054 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The most general charged and rotating black hole in Kaluza-Klein theory is
known to be described by the Rasheed-Larsen solution. When the under-rotating
extremal limit of this solution is taken, it falls into a general class of
solutions of Kaluza-Klein theory found by Cl\'ement, and is specified by two
harmonic func... | [
{
"created": "Wed, 29 Nov 2023 15:35:54 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Feb 2024 11:22:37 GMT",
"version": "v2"
}
] | 2024-02-23 | [
[
"Teo",
"Edward",
""
],
[
"Wan",
"Thomas",
""
]
] | The most general charged and rotating black hole in Kaluza-Klein theory is known to be described by the Rasheed-Larsen solution. When the under-rotating extremal limit of this solution is taken, it falls into a general class of solutions of Kaluza-Klein theory found by Cl\'ement, and is specified by two harmonic functi... |
gr-qc/0311065 | Daniel Arteaga | Daniel Arteaga, Renaud Parentani and Enric Verdaguer | Propagation in a thermal graviton background | 16 pages, 4 figures. This version matches the published paper | Phys.Rev. D70 (2004) 044019 | 10.1103/PhysRevD.70.044019 | null | gr-qc astro-ph hep-th | null | It is well known that radiative corrections evaluated in nontrivial
backgrounds lead to effective dispersion relations which are not Lorentz
invariant. Since gravitational interactions increase with energy,
gravity-induced radiative corrections could be relevant for the trans-Planckian
problem. As a first step to exp... | [
{
"created": "Thu, 20 Nov 2003 14:53:03 GMT",
"version": "v1"
},
{
"created": "Tue, 25 May 2004 10:02:53 GMT",
"version": "v2"
},
{
"created": "Mon, 30 Aug 2004 09:41:33 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Arteaga",
"Daniel",
""
],
[
"Parentani",
"Renaud",
""
],
[
"Verdaguer",
"Enric",
""
]
] | It is well known that radiative corrections evaluated in nontrivial backgrounds lead to effective dispersion relations which are not Lorentz invariant. Since gravitational interactions increase with energy, gravity-induced radiative corrections could be relevant for the trans-Planckian problem. As a first step to explo... |
1207.5410 | Fabio Garufi | Mariafelicia De Laurentis, Rosario De Rosa, Fabio Garufi and Leopoldo
Milano | Testing gravitational theories using Eccentric Eclipsing Detached
Binaries | 15 pages, 8 figures, 5 tables; Monthly Notices of the Royal
Astronomical Society (2012) "Early View". arXiv admin note: text overlap with
arXiv:gr-qc/0603071 by other authors | null | 10.1111/j.1365-2966.2012.21410.x | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we compare the effects of different theories of gravitation on
the apsidal motion of a sample of Eccentric Eclipsing Detached Binary stars.
The comparison is performed by using the formalism of the Post-Newtonian
parametrization to calculate the theoretical advance at periastron and compare
it to the ob... | [
{
"created": "Mon, 23 Jul 2012 14:24:19 GMT",
"version": "v1"
}
] | 2012-07-24 | [
[
"De Laurentis",
"Mariafelicia",
""
],
[
"De Rosa",
"Rosario",
""
],
[
"Garufi",
"Fabio",
""
],
[
"Milano",
"Leopoldo",
""
]
] | In this paper we compare the effects of different theories of gravitation on the apsidal motion of a sample of Eccentric Eclipsing Detached Binary stars. The comparison is performed by using the formalism of the Post-Newtonian parametrization to calculate the theoretical advance at periastron and compare it to the obse... |
gr-qc/0103038 | Diego Pavon | Luis P Chimento, Alejandro S Jakubi, Diego Pavon | Varying c and Particle Horizons | Latex file, 8 pages, to be published in Physics Letters B | Phys.Lett. B508 (2001) 1-5 | 10.1016/S0370-2693(01)00400-2 | null | gr-qc astro-ph | null | We explore what restrictions may impose the second law of thermodynamics on
varying speed of light theories. We find that the attractor scenario solving
the flatness problem is consistent with the generalized second law at late
time.
| [
{
"created": "Tue, 13 Mar 2001 11:21:06 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Chimento",
"Luis P",
""
],
[
"Jakubi",
"Alejandro S",
""
],
[
"Pavon",
"Diego",
""
]
] | We explore what restrictions may impose the second law of thermodynamics on varying speed of light theories. We find that the attractor scenario solving the flatness problem is consistent with the generalized second law at late time. |
gr-qc/9907100 | Banibrata Mukhopadhyay | Banibrata Mukhopadhyay and Sandip K. Chakrabarti | Semi-analytical Solution of Dirac equation in Schwarzschild Geometry | RevTex, 11 Latex pages and 12 Figures ; Classical and Quantum Gravity
(in Press) (1999) | Class.Quant.Grav. 16 (1999) 3165-3181 | 10.1088/0264-9381/16/10/309 | null | gr-qc astro-ph | null | Separation of the Dirac equation in the spacetime around a Kerr black hole
into radial and angular coordinates was done by Chandrasekhar in 1976. In the
present paper, we solve the radial equations in a Schwarzschild geometry
semi-analytically using Wentzel-Kramers-Brillouin approximation (in short WKB)
method. Among... | [
{
"created": "Thu, 29 Jul 1999 06:29:42 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Mukhopadhyay",
"Banibrata",
""
],
[
"Chakrabarti",
"Sandip K.",
""
]
] | Separation of the Dirac equation in the spacetime around a Kerr black hole into radial and angular coordinates was done by Chandrasekhar in 1976. In the present paper, we solve the radial equations in a Schwarzschild geometry semi-analytically using Wentzel-Kramers-Brillouin approximation (in short WKB) method. Among o... |
gr-qc/0701152 | Steven Willison | Elias Gravanis and Steven Willison | `Mass without mass' from thin shells in Gauss-Bonnet gravity | 13 pages, RevTex, 8 figures. Version 2: includes discussion on the
well-defined thin shell limit. Version 3: typos fixed, a reference added,
accepted for publication in Phys. Rev. D | Phys.Rev.D75:084025,2007 | 10.1103/PhysRevD.75.084025 | CECS-PHY-07/01 | gr-qc hep-th | null | Five tensor equations are obtained for a thin shell in Gauss-Bonnet gravity.
There is the well known junction condition for the singular part of the stress
tensor intrinsic to the shell, which we also prove to be well defined. There
are also equations relating the geometry of the shell (jump and average of the
extrin... | [
{
"created": "Sun, 28 Jan 2007 00:00:39 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Feb 2007 21:52:40 GMT",
"version": "v2"
},
{
"created": "Thu, 22 Mar 2007 16:17:50 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Gravanis",
"Elias",
""
],
[
"Willison",
"Steven",
""
]
] | Five tensor equations are obtained for a thin shell in Gauss-Bonnet gravity. There is the well known junction condition for the singular part of the stress tensor intrinsic to the shell, which we also prove to be well defined. There are also equations relating the geometry of the shell (jump and average of the extrinsi... |
gr-qc/0606073 | L\'aszl\'o \'A Gergely | L\'aszl\'o \'A. Gergely | Dark energy from gravitational collapse? | 6 pages, Honorable Mention in the Gravity Research Foundation's 2006
Essays in Gravitation Competition | null | null | null | gr-qc astro-ph hep-th | null | We discuss the status of both cosmological and black hole type singularities
in the framework of the brane-world model of gravity. We point out that the Big
Bang is not properly understood yet. We also show new features of the
gravitational collapse on the brane, the most important being the production of
dark energy... | [
{
"created": "Fri, 16 Jun 2006 17:47:40 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gergely",
"László Á.",
""
]
] | We discuss the status of both cosmological and black hole type singularities in the framework of the brane-world model of gravity. We point out that the Big Bang is not properly understood yet. We also show new features of the gravitational collapse on the brane, the most important being the production of dark energy d... |
2209.06670 | Salvatore Capozziello | Salvatore Capozziello and Mehdi Shokri | Slow-roll inflation in $f(Q)$ non-metric gravity | 18 pages, 7 figures, accepted for publication ion Physics of the Dark
Universe | Phys.Dark Univ. 37 (2022) 101113 | 10.1016/j.dark.2022.101113 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | We discuss the cosmological inflation in the context of $f(Q)$ non-metric
gravity, where $Q$ is the non-metric scalar. After introducing conformal
transformations for $f(Q)$ gravity, we first focus on the potential-slow-roll
inflation by studying the corresponding potentials for different forms of the
function $f(Q)$... | [
{
"created": "Wed, 14 Sep 2022 14:27:42 GMT",
"version": "v1"
}
] | 2022-09-23 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Shokri",
"Mehdi",
""
]
] | We discuss the cosmological inflation in the context of $f(Q)$ non-metric gravity, where $Q$ is the non-metric scalar. After introducing conformal transformations for $f(Q)$ gravity, we first focus on the potential-slow-roll inflation by studying the corresponding potentials for different forms of the function $f(Q)$ i... |
1808.06683 | David Garfinkle | David Garfinkle, Lawrence R. Mead, H.I. Ringermacher | The shape of the orbit in FLRW spacetimes | submitted as a Note to CQG | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The shape of the orbit of a free particle is examined in FLRW cosmologies.
The spatial projection of the orbit is time-independent and has a simple
geometric description. We relate this description to the expression in terms of
standard FLRW coordinates.
| [
{
"created": "Mon, 20 Aug 2018 20:29:58 GMT",
"version": "v1"
}
] | 2018-08-22 | [
[
"Garfinkle",
"David",
""
],
[
"Mead",
"Lawrence R.",
""
],
[
"Ringermacher",
"H. I.",
""
]
] | The shape of the orbit of a free particle is examined in FLRW cosmologies. The spatial projection of the orbit is time-independent and has a simple geometric description. We relate this description to the expression in terms of standard FLRW coordinates. |
gr-qc/0208061 | Luz Maria Diaz-Rivera | L. M. Diaz-Rivera and Luis O. Pimentel | Required Conditions for Late Time Acceleration and Early Time
Deceleration in Generalized Scalar-Tensor Theories | 21 pages, 5 figures, to appear in Int. J. Mod. Phys. A | Int.J.Mod.Phys. A18 (2003) 651-672 | 10.1142/S0217751X03012205 | null | gr-qc | null | We consider a generalized scalar-tensor theory, where we let the coupling
function $\omega(\phi)$ and the effective cosmological constants
$\Lambda(\phi)$ undetermined. We obtain general expressions for $\omega(\phi)$
and $\Lambda(\phi)$ in terms of the scalar field and the scale factor, and show
that $\omega(\phi)$ ... | [
{
"created": "Wed, 21 Aug 2002 19:08:51 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Diaz-Rivera",
"L. M.",
""
],
[
"Pimentel",
"Luis O.",
""
]
] | We consider a generalized scalar-tensor theory, where we let the coupling function $\omega(\phi)$ and the effective cosmological constants $\Lambda(\phi)$ undetermined. We obtain general expressions for $\omega(\phi)$ and $\Lambda(\phi)$ in terms of the scalar field and the scale factor, and show that $\omega(\phi)$ de... |
2310.01447 | Fabrice Debbasch | Fabrice Debbasch | Space-Time from quantum Physics | null | null | null | null | gr-qc hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | A construction of the real 4D Minkowski space-time starting from quantum
harmonic oscillators is proposed. First, a 2D spinor space and its dual are
derived from the standard commutation relations obeyed by the ladder operators
of two independent 1D harmonic oscillators. The complex 4D Minkowvski vector
space V is th... | [
{
"created": "Sun, 1 Oct 2023 14:50:46 GMT",
"version": "v1"
}
] | 2023-10-04 | [
[
"Debbasch",
"Fabrice",
""
]
] | A construction of the real 4D Minkowski space-time starting from quantum harmonic oscillators is proposed. First, a 2D spinor space and its dual are derived from the standard commutation relations obeyed by the ladder operators of two independent 1D harmonic oscillators. The complex 4D Minkowvski vector space V is then... |
0912.5443 | Emilio Santos Corchero | Emilio Santos | Space-time curvature due to quantum vacuum fluctuations: An alternative
to dark energy? | null | Phys.Lett.A374:709-712,2010 | 10.1016/j.physleta.2009.11.079 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is pointed out that quantum vacuum fluctuations may give rise to a
curvature of space-time equivalent to the curvature currently attributed to
dark energy. A simple calculation is made, which suggests that the value of the
dark energy density is roughly given by the product of Newton constant time the
quantity m^6... | [
{
"created": "Wed, 30 Dec 2009 10:35:46 GMT",
"version": "v1"
}
] | 2010-05-12 | [
[
"Santos",
"Emilio",
""
]
] | It is pointed out that quantum vacuum fluctuations may give rise to a curvature of space-time equivalent to the curvature currently attributed to dark energy. A simple calculation is made, which suggests that the value of the dark energy density is roughly given by the product of Newton constant time the quantity m^6 c... |
1806.07242 | Hossein Ghaffarnejad | Emad Yaraie, Hossein Ghaffarnejad, Mohammad Farsam | Complexity growth and shock wave geometry in
AdS-Maxwell-power-Yang-Mills theory | 18 pages, 2 Figures and improved with some additional sentences | The European Physical Journal C 2018 | 10.1140/epjc/s10052-018-6456-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study effects of non-abelian gauge fields on the holographic
characteristics for instance the evolution of computational complexity. To do
so we choose Maxwell-power-Yang-Mills theory defined in the AdS space-time.
Then we seek the impact of charge of the YM field on the complexity growth rate
by using $complexity... | [
{
"created": "Fri, 15 Jun 2018 22:13:36 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Sep 2018 20:48:48 GMT",
"version": "v2"
},
{
"created": "Sat, 10 Nov 2018 21:55:12 GMT",
"version": "v3"
}
] | 2018-11-19 | [
[
"Yaraie",
"Emad",
""
],
[
"Ghaffarnejad",
"Hossein",
""
],
[
"Farsam",
"Mohammad",
""
]
] | We study effects of non-abelian gauge fields on the holographic characteristics for instance the evolution of computational complexity. To do so we choose Maxwell-power-Yang-Mills theory defined in the AdS space-time. Then we seek the impact of charge of the YM field on the complexity growth rate by using $complexity=a... |
gr-qc/9801045 | Remo Garattini | Remo Garattini | Space-time Foam, Casimir energy and black hole pair creation | Revtex 3.0, 9 pages, to appear in Mod. Phys. Lett. A | Mod.Phys.Lett. A13 (1998) 159-164 | 10.1142/S0217732398000206 | null | gr-qc hep-th | null | We conjecture that the neutral black hole pair production is related to the
vacuum fluctuation of pure gravity via the Casimir-like energy. Implications on
the foam-like structure of spacetime are discussed.
| [
{
"created": "Wed, 14 Jan 1998 22:55:29 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Garattini",
"Remo",
""
]
] | We conjecture that the neutral black hole pair production is related to the vacuum fluctuation of pure gravity via the Casimir-like energy. Implications on the foam-like structure of spacetime are discussed. |
1904.01249 | Bahram Mashhoon | Hassan Firouzjahi and Bahram Mashhoon | Twisted Gravitational Waves in the Presence of a Cosmological Constant | 30 pages, 1 figure; v2: Section V improved, reference added; v3:
revised version, figures added; v4: minor corrections, matches published
version | Phys. Rev. D 100, 084027 (2019) | 10.1103/PhysRevD.100.084027 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find exact nonlinear solutions of general relativity that represent
twisted gravitational waves (TGWs) in the presence of a cosmological constant.
A TGW is a nonplanar wave propagating along a fixed spatial direction with a
null Killing wave vector that has a nonzero twist tensor. The solutions all
turn out to hav... | [
{
"created": "Tue, 2 Apr 2019 07:18:51 GMT",
"version": "v1"
},
{
"created": "Tue, 14 May 2019 12:26:01 GMT",
"version": "v2"
},
{
"created": "Sun, 21 Jul 2019 15:06:58 GMT",
"version": "v3"
},
{
"created": "Mon, 14 Oct 2019 19:20:15 GMT",
"version": "v4"
}
] | 2019-10-23 | [
[
"Firouzjahi",
"Hassan",
""
],
[
"Mashhoon",
"Bahram",
""
]
] | We find exact nonlinear solutions of general relativity that represent twisted gravitational waves (TGWs) in the presence of a cosmological constant. A TGW is a nonplanar wave propagating along a fixed spatial direction with a null Killing wave vector that has a nonzero twist tensor. The solutions all turn out to have ... |
2006.01452 | Vittorio De Falco Dr | Vittorio De Falco, Pavel Bakala, Maurizio Falanga | Three-dimensional general relativistic Poynting-Robertson effect. III.
Static and non-spherical quadrupolar massive source | 16 pages, 11 figures. Paper accepted on the 2nd of June 2020 on Phys.
Rev. D | null | 10.1103/PhysRevD.101.124031 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the three-dimensional motion of a test particle in the
gravitational field generated by a non-spherical compact object endowed with a
mass quadrupole moment, described by the Erez-Rosen metric, and a radiation
field, including the general relativistic Poynting-Robertson effect, coming
from a rigidly ro... | [
{
"created": "Tue, 2 Jun 2020 08:46:54 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jun 2020 09:36:03 GMT",
"version": "v2"
}
] | 2020-07-01 | [
[
"De Falco",
"Vittorio",
""
],
[
"Bakala",
"Pavel",
""
],
[
"Falanga",
"Maurizio",
""
]
] | We investigate the three-dimensional motion of a test particle in the gravitational field generated by a non-spherical compact object endowed with a mass quadrupole moment, described by the Erez-Rosen metric, and a radiation field, including the general relativistic Poynting-Robertson effect, coming from a rigidly rota... |
gr-qc/0303047 | Koryukin | Valery Koryukin (Mari State Technical University) | Gravitational fields and dark matter | plain tex, 7 pages | null | null | null | gr-qc | null | In this paper a hypothesis is considered, in which neutrinos and other weakly
interacting particles play a fundamental role in Universe. In addition the
Newton gravitational constant $G_N$ and the Hubble constant $H$ are interpreted
as parameters, characterizing the neutrinos background of Universe.
| [
{
"created": "Wed, 12 Mar 2003 06:43:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Koryukin",
"Valery",
"",
"Mari State Technical University"
]
] | In this paper a hypothesis is considered, in which neutrinos and other weakly interacting particles play a fundamental role in Universe. In addition the Newton gravitational constant $G_N$ and the Hubble constant $H$ are interpreted as parameters, characterizing the neutrinos background of Universe. |
2408.03978 | Stefano Vignolo Professor | Stefano Vignolo, Fabrizio Esposito, Sante Carloni | A note on the junction conditions in f(Q)-gravity | in press | Classical and Quantum Gravity, 2024 | 10.1088/1361-6382/ad6be0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the notion of distribution-valued tensor, we discuss the junction
conditions within the framework of f(Q)-gravity. We obtain the necessary and
sufficient conditions for two distinct solutions of the field equations to be
smoothly joined on a given separation hypersurface.
| [
{
"created": "Wed, 7 Aug 2024 14:53:14 GMT",
"version": "v1"
}
] | 2024-08-09 | [
[
"Vignolo",
"Stefano",
""
],
[
"Esposito",
"Fabrizio",
""
],
[
"Carloni",
"Sante",
""
]
] | Using the notion of distribution-valued tensor, we discuss the junction conditions within the framework of f(Q)-gravity. We obtain the necessary and sufficient conditions for two distinct solutions of the field equations to be smoothly joined on a given separation hypersurface. |
gr-qc/0601116 | Kourosh Nozari | Kourosh Nozari and A. S. Sefiedgar | Comparison of Approaches to Quantum Correction of Black Hole
Thermodynamics | 10 Pages, No Figures | Phys.Lett.B635:156-160,2006 | 10.1016/j.physletb.2006.01.043 | null | gr-qc | null | There are several approaches to quantum gravitational corrections of black
hole thermodynamics. String theory and loop quantum gravity, by direct analysis
on the basis of quantum properties of black holes, show that in the
entropy-area relation the leading order correction should be of log-area type.
On the other han... | [
{
"created": "Fri, 27 Jan 2006 08:32:18 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Nozari",
"Kourosh",
""
],
[
"Sefiedgar",
"A. S.",
""
]
] | There are several approaches to quantum gravitational corrections of black hole thermodynamics. String theory and loop quantum gravity, by direct analysis on the basis of quantum properties of black holes, show that in the entropy-area relation the leading order correction should be of log-area type. On the other hand,... |
1601.05396 | Prayush Kumar | Prayush Kumar, Tony Chu, Heather Fong, Harald P. Pfeiffer, Michael
Boyle, Daniel A. Hemberger, Lawrence E. Kidder, Mark A. Scheel, and Bela
Szilagyi | Accuracy of binary black hole waveform models for aligned-spin binaries | 24 pages, 15 figures, minor changes | Phys. Rev. D 93, 104050 (2016) | 10.1103/PhysRevD.93.104050 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Coalescing binary black holes are among the primary science targets for
second generation ground-based gravitational wave (GW) detectors. Reliable GW
models are central to detection of such systems and subsequent parameter
estimation. This paper performs a comprehensive analysis of the accuracy of
recent waveform mod... | [
{
"created": "Wed, 20 Jan 2016 20:11:34 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jan 2016 21:45:29 GMT",
"version": "v2"
}
] | 2016-06-01 | [
[
"Kumar",
"Prayush",
""
],
[
"Chu",
"Tony",
""
],
[
"Fong",
"Heather",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Boyle",
"Michael",
""
],
[
"Hemberger",
"Daniel A.",
""
],
[
"Kidder",
"Lawrence E.",
""
],
... | Coalescing binary black holes are among the primary science targets for second generation ground-based gravitational wave (GW) detectors. Reliable GW models are central to detection of such systems and subsequent parameter estimation. This paper performs a comprehensive analysis of the accuracy of recent waveform model... |
0901.3865 | Aron Wall | Aron C. Wall | Ten Proofs of the Generalized Second Law | 60 pages, 2 figures, 1 table. v2: corrected typos and added a
footnote to match the published version | JHEP 0906:021,2009 | 10.1088/1126-6708/2009/06/021 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ten attempts to prove the Generalized Second Law of Thermodyanmics (GSL) are
described and critiqued. Each proof provides valuable insights which should be
useful for constructing future, more complete proofs. Rather than merely
summarizing previous research, this review offers new perspectives, and
strategies for ov... | [
{
"created": "Sat, 24 Jan 2009 23:48:14 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Oct 2009 00:48:13 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Wall",
"Aron C.",
""
]
] | Ten attempts to prove the Generalized Second Law of Thermodyanmics (GSL) are described and critiqued. Each proof provides valuable insights which should be useful for constructing future, more complete proofs. Rather than merely summarizing previous research, this review offers new perspectives, and strategies for over... |
gr-qc/9409054 | Misao Sasaki | Masaru Shibata, Misao Sasaki, Hideyuki Tagoshi and Takahiro Tanaka | Gravitational Waves from a Particle Orbiting Around a Rotating Black
Holes: Post-Newtonian Expansion | phyzzx 41 pages | Phys.Rev.D51:1646-1663,1995 | 10.1103/PhysRevD.51.1646 | KUNS 1268 / OU-TAP-9 | gr-qc astro-ph | null | Using the Teukolsky and Sasaki-Nakamura equations for the gravitational
perturbation of the Kerr spacetime, we calculate the post-Newtonian expansion
of the energy and angular momentum luminosities of gravitational waves from a
test particle orbiting around a rotating black hole up through ${\rm P^{5/2}N}$
order beyo... | [
{
"created": "Tue, 27 Sep 1994 10:26:08 GMT",
"version": "v1"
}
] | 2009-10-09 | [
[
"Shibata",
"Masaru",
""
],
[
"Sasaki",
"Misao",
""
],
[
"Tagoshi",
"Hideyuki",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | Using the Teukolsky and Sasaki-Nakamura equations for the gravitational perturbation of the Kerr spacetime, we calculate the post-Newtonian expansion of the energy and angular momentum luminosities of gravitational waves from a test particle orbiting around a rotating black hole up through ${\rm P^{5/2}N}$ order beyond... |
1511.00609 | Giampiero Esposito Dr. | Enrico Calloni, S. Caprara, Martina De Laurentis, Giampiero Esposito,
M. Grilli, Ettore Majorana, G.P. Pepe, S. Petrarca, Paola Puppo, P.
Rapagnini, F. Ricci, Luigi Rosa, Carlo Rovelli, P. Ruggi, N.L. Saini, Cosimo
Stornaiolo, Francesco Tafuri | The Archimedes experiment | 4 pages, 2 figures | null | 10.1016/j.nima.2015.09.071 | null | gr-qc physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Archimedes is an INFN-funded pathfinder experiment aimed at verifying the
feasibility of measuring the interaction of vacuum fluctuations with gravity.
The final experiment will measure the force exerted by the gravitational field
on a Casimir cavity whose vacuum energy is modulated with a superconductive
transition,... | [
{
"created": "Mon, 2 Nov 2015 17:42:46 GMT",
"version": "v1"
}
] | 2016-06-22 | [
[
"Calloni",
"Enrico",
""
],
[
"Caprara",
"S.",
""
],
[
"De Laurentis",
"Martina",
""
],
[
"Esposito",
"Giampiero",
""
],
[
"Grilli",
"M.",
""
],
[
"Majorana",
"Ettore",
""
],
[
"Pepe",
"G. P.",
""
],
[
... | Archimedes is an INFN-funded pathfinder experiment aimed at verifying the feasibility of measuring the interaction of vacuum fluctuations with gravity. The final experiment will measure the force exerted by the gravitational field on a Casimir cavity whose vacuum energy is modulated with a superconductive transition, b... |
1607.02750 | Hor\'acio Santana Vieira | H. S. Vieira | Analytic solutions in the acoustic black hole analogue of the conical
Kerr metric | 6 pages | Chinese Physics C 41 (2017) 043105 | 10.1088/1674-1137/41/4/043105 | null | gr-qc cond-mat.other | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the sound perturbation of a rotating acoustic black hole in the
presence of a disclination. The radial part of the massless Klein-Gordon
equation is written into a Heun form, and its analytical solution is obtained.
These solutions have an explicit dependence on the parameter of the
disclination. We obtain t... | [
{
"created": "Sun, 10 Jul 2016 14:26:22 GMT",
"version": "v1"
},
{
"created": "Sun, 2 Apr 2017 12:18:38 GMT",
"version": "v2"
}
] | 2017-04-04 | [
[
"Vieira",
"H. S.",
""
]
] | We study the sound perturbation of a rotating acoustic black hole in the presence of a disclination. The radial part of the massless Klein-Gordon equation is written into a Heun form, and its analytical solution is obtained. These solutions have an explicit dependence on the parameter of the disclination. We obtain the... |
1210.6257 | Thomas Krajewski | Thomas Krajewski | Group field theories | Lectures given at the "3rd Quantum Gravity and Quantum Geometry
School", march 2011, Zakopane | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Group field theories are particular quantum field theories defined on D
copies of a group which reproduce spin foam amplitudes on a space-time of
dimension D. In these lecture notes, we present the general construction of
group field theories, merging ideas from tensor models and loop quantum
gravity. This lecture is... | [
{
"created": "Tue, 23 Oct 2012 14:57:43 GMT",
"version": "v1"
}
] | 2012-10-24 | [
[
"Krajewski",
"Thomas",
""
]
] | Group field theories are particular quantum field theories defined on D copies of a group which reproduce spin foam amplitudes on a space-time of dimension D. In these lecture notes, we present the general construction of group field theories, merging ideas from tensor models and loop quantum gravity. This lecture is o... |
2207.06957 | Antonio Tedesco | Antonio Capolupo, Gaetano Lambiase, Antonio Tedesco | Precession shift in curvature based Extended Theories of Gravity and
Quintessence fields | null | Eur. Phys. J. C (2022) 82:286 | 10.1140/epjc/s10052-022-10235-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we constrain the sizes of hypothetical new weak forces by
making use the data coming from the precession of Planets. We consider the weak
field approximation of Scalar-Tensor Fourth Order Gravity (STFOG), which
include several models of modified gravity. The form of the corrections to the
Newtonian pote... | [
{
"created": "Thu, 14 Jul 2022 14:26:28 GMT",
"version": "v1"
}
] | 2022-07-20 | [
[
"Capolupo",
"Antonio",
""
],
[
"Lambiase",
"Gaetano",
""
],
[
"Tedesco",
"Antonio",
""
]
] | In this paper we constrain the sizes of hypothetical new weak forces by making use the data coming from the precession of Planets. We consider the weak field approximation of Scalar-Tensor Fourth Order Gravity (STFOG), which include several models of modified gravity. The form of the corrections to the Newtonian potent... |
1607.06229 | Alfred Molina | Alfred Molina, Naresh Dadhich and Avas Khugaev | Buchdahl-Vaidya-Tikekar model for stellar interior in pure Lovelock
gravity - II | 18 pages, 7 figures | null | 10.1007/s10714-017-2259-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For a given Lovelock order $N$, it turns out that static fluid solutions of
the pure Lovelock equation for a star interior have the universal behavior in
all $n\geq 2N+2$ dimensions relative to an appropriately defined variable and
the Vaidya-Tikekar parameter $K$, indicating deviation from sphericity of
$3$-space ge... | [
{
"created": "Thu, 21 Jul 2016 08:31:21 GMT",
"version": "v1"
}
] | 2017-06-30 | [
[
"Molina",
"Alfred",
""
],
[
"Dadhich",
"Naresh",
""
],
[
"Khugaev",
"Avas",
""
]
] | For a given Lovelock order $N$, it turns out that static fluid solutions of the pure Lovelock equation for a star interior have the universal behavior in all $n\geq 2N+2$ dimensions relative to an appropriately defined variable and the Vaidya-Tikekar parameter $K$, indicating deviation from sphericity of $3$-space geom... |
gr-qc/0401050 | Mohammad Reza Setare | M. R. Setare and Khaled Saaidi | Spin Zero Quantum Relativistic Particles in Einstein Universe | 4 pages, no figure, accepted for publication in International Journal
of Theoretical Physics | Int.J.Theor.Phys. 43 (2004) 421-424 | 10.1023/B:IJTP.0000028874.48865.d6 | null | gr-qc | null | In this letter we have considered the eigenvalues and eigenfunctions of
relativistic massless scalar particle which conformally coupled to the
background of Einstein universe. We found the eigenvalues and eigenfunctions
exactly.
| [
{
"created": "Tue, 13 Jan 2004 07:38:19 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Setare",
"M. R.",
""
],
[
"Saaidi",
"Khaled",
""
]
] | In this letter we have considered the eigenvalues and eigenfunctions of relativistic massless scalar particle which conformally coupled to the background of Einstein universe. We found the eigenvalues and eigenfunctions exactly. |
2012.08249 | Anna Ijjas | Anna Ijjas and Roman Kolevatov | Sourcing curvature modes with entropy perturbations in non-singular
bouncing cosmologies | 17 pages | JCAP 06 (2021) 012 | 10.1088/1475-7516/2021/06/012 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | The observed temperature fluctuations in the cosmic microwave background can
be traced back to primordial curvature modes that are sourced by adiabatic
and/or entropic matter perturbations. In this paper, we explore the entropic
mechanism in the context of non-singular bouncing cosmologies. We show that
curvature mod... | [
{
"created": "Tue, 15 Dec 2020 12:29:20 GMT",
"version": "v1"
}
] | 2021-06-09 | [
[
"Ijjas",
"Anna",
""
],
[
"Kolevatov",
"Roman",
""
]
] | The observed temperature fluctuations in the cosmic microwave background can be traced back to primordial curvature modes that are sourced by adiabatic and/or entropic matter perturbations. In this paper, we explore the entropic mechanism in the context of non-singular bouncing cosmologies. We show that curvature modes... |
gr-qc/0402026 | Dirk Puetzfeld | Dirk Puetzfeld, Xuelei Chen | Testing non-standard cosmological models with supernovae | 21 pages, 10 figures, uses IOP preprint style, submitted to Class.
Quantum Grav | Class.Quant.Grav. 21 (2004) 2703-2722 | 10.1088/0264-9381/21/11/013 | null | gr-qc astro-ph | null | In this work we study the magnitude-redshift relation of a non-standard
cosmological model. The model under consideration was firstly investigated
within a special case of metric-affine gravity (MAG) and was recently recovered
via different approaches by two other groups. Apart from the usual cosmological
parameters ... | [
{
"created": "Wed, 4 Feb 2004 20:47:41 GMT",
"version": "v1"
}
] | 2009-04-03 | [
[
"Puetzfeld",
"Dirk",
""
],
[
"Chen",
"Xuelei",
""
]
] | In this work we study the magnitude-redshift relation of a non-standard cosmological model. The model under consideration was firstly investigated within a special case of metric-affine gravity (MAG) and was recently recovered via different approaches by two other groups. Apart from the usual cosmological parameters fo... |
2305.07683 | Pardyumn Kumar Sahoo | Raja Solanki, Bina Patel, Lakhan V. Jaybhaye, P.K. Sahoo | Cosmic acceleration with bulk viscosity in an anisotropic $f(R,L_m)$
background | Communications in Theoretical Physics accepted version | Communications in Theoretical Physics, 75(7) (2023) 075401 | 10.1088/1572-9494/acd4aa | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this article, we investigate the observed cosmic acceleration in the
framework of a cosmological $f(R,L_m)$ model dominated by bulk viscous matter
in an anisotropic background. We consider the LRS Bianchi type I metric and
derive the Friedmann equations that drive the gravitational interactions in
$f(R,L_m)$ gravi... | [
{
"created": "Fri, 12 May 2023 11:20:50 GMT",
"version": "v1"
}
] | 2023-06-14 | [
[
"Solanki",
"Raja",
""
],
[
"Patel",
"Bina",
""
],
[
"Jaybhaye",
"Lakhan V.",
""
],
[
"Sahoo",
"P. K.",
""
]
] | In this article, we investigate the observed cosmic acceleration in the framework of a cosmological $f(R,L_m)$ model dominated by bulk viscous matter in an anisotropic background. We consider the LRS Bianchi type I metric and derive the Friedmann equations that drive the gravitational interactions in $f(R,L_m)$ gravity... |
gr-qc/9911123 | Carmen Chicone | C. Chicone, B. Mashhoon, and D. G. Retzloff | Sustained resonance: a binary system perturbed by gravitational
radiation | 21 pages, 5 figures. To appear in Journal of Physics A | J.Phys.A33:513-530,2000 | 10.1088/0305-4470/33/3/307 | null | gr-qc astro-ph nlin.CD | null | The general phenomena associated with sustained resonance are studied in this
paper in connection with relativistic binary pulsars. We represent such a
system by two point masses in a Keplerian binary system that evolves via
gravitational radiation damping as well as an external tidal perturbation. For
further simpli... | [
{
"created": "Tue, 30 Nov 1999 22:54:51 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Chicone",
"C.",
""
],
[
"Mashhoon",
"B.",
""
],
[
"Retzloff",
"D. G.",
""
]
] | The general phenomena associated with sustained resonance are studied in this paper in connection with relativistic binary pulsars. We represent such a system by two point masses in a Keplerian binary system that evolves via gravitational radiation damping as well as an external tidal perturbation. For further simplifi... |
1811.03634 | Ismael Delgado Gaspar PhD | Ismael Delgado Gaspar, Juan Carlos Hidalgo, Roberto A. Sussman | Non-comoving baryons and cold dark matter in cosmic voids | Discussion of the evolution of baryon-CDM relative velocity added.
Other minor but important corrections were incorporated. Version accepted for
publication in EPJC | null | 10.1140/epjc/s10052-019-6606-x | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the fully relativistic evolution of cosmic voids constituted by
baryons and cold dark matter (CDM), represented by two non-comoving dust
sources in a $\Lambda$CDM background. For this purpose, we consider numerical
solutions of Einstein's field equations in a fluid-flow representation adapted
to spherical ... | [
{
"created": "Thu, 8 Nov 2018 19:00:28 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Jan 2019 06:43:13 GMT",
"version": "v2"
}
] | 2019-02-12 | [
[
"Gaspar",
"Ismael Delgado",
""
],
[
"Hidalgo",
"Juan Carlos",
""
],
[
"Sussman",
"Roberto A.",
""
]
] | We examine the fully relativistic evolution of cosmic voids constituted by baryons and cold dark matter (CDM), represented by two non-comoving dust sources in a $\Lambda$CDM background. For this purpose, we consider numerical solutions of Einstein's field equations in a fluid-flow representation adapted to spherical sy... |
gr-qc/9406021 | Robert Mann | J.S.F. Chan and R.B. Mann | Mass inflation in (1+1)-dimensional Dilaton Gravity | 15 pages, 4 figures (appended as postscript files) (uses epsf.tex) | Phys.Rev. D50 (1994) 7376-7384 | 10.1103/PhysRevD.50.7376 | null | gr-qc | null | We investigate the phenomenon of mass inflation in two-dimensional dilaton
theories of gravity. We consider two distinct black hole spacetimes and
construct the mass-inflation solution for each. Our analysis is extended to
include multi-horizon spacetimes. We find that the mass function diverges in a
manner quantitat... | [
{
"created": "Tue, 14 Jun 1994 17:17:16 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Chan",
"J. S. F.",
""
],
[
"Mann",
"R. B.",
""
]
] | We investigate the phenomenon of mass inflation in two-dimensional dilaton theories of gravity. We consider two distinct black hole spacetimes and construct the mass-inflation solution for each. Our analysis is extended to include multi-horizon spacetimes. We find that the mass function diverges in a manner quantitativ... |
1405.1026 | Kenji Tomita | Kenji Tomita | Cosmological entropy production and viscous processes in the
(1+3+6)-dimensional space-times | 21 pages, 13 figures | Prog. Theor. Exp. Phys. 2014, 053E01 | 10.1093/ptep/ptu061 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The cosmological entropy production is studied in the (1+3+6)-dimensional
space-times consisting of the outer space (the 3-dimensional expanding section)
and the inner space (the 6-dimensional section). The inner space expands
initially and contracts later. First it is shown how the production of the
3-dimensional en... | [
{
"created": "Mon, 5 May 2014 02:08:59 GMT",
"version": "v1"
},
{
"created": "Fri, 23 May 2014 00:17:12 GMT",
"version": "v2"
}
] | 2014-05-26 | [
[
"Tomita",
"Kenji",
""
]
] | The cosmological entropy production is studied in the (1+3+6)-dimensional space-times consisting of the outer space (the 3-dimensional expanding section) and the inner space (the 6-dimensional section). The inner space expands initially and contracts later. First it is shown how the production of the 3-dimensional entr... |
1012.3703 | Marcus Thierfelder | Marcus Thierfelder, Sebastiano Bernuzzi, David Hilditch, Bernd
Bruegmann and Luciano Rezzolla | The trumpet solution from spherical gravitational collapse with puncture
gauges | null | Phys.Rev.D83:064022,2011 | 10.1103/PhysRevD.83.064022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the stationary end-state obtained by evolving a collapsing
spherical star with the gauges routinely adopted to study puncture black holes.
We compare the end-state of the collapse with the trumpet solution found in the
evolution of a single wormhole slice and show that the two solutions closely
agree. ... | [
{
"created": "Thu, 16 Dec 2010 18:08:37 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Mar 2011 09:47:44 GMT",
"version": "v2"
}
] | 2011-03-28 | [
[
"Thierfelder",
"Marcus",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Hilditch",
"David",
""
],
[
"Bruegmann",
"Bernd",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | We investigate the stationary end-state obtained by evolving a collapsing spherical star with the gauges routinely adopted to study puncture black holes. We compare the end-state of the collapse with the trumpet solution found in the evolution of a single wormhole slice and show that the two solutions closely agree. We... |
gr-qc/9708031 | Melnikov Vitaly | M. A. Grebeniuk, V. D. Ivashchuk and V. N. Melnikov | Integrable Multidimensional Classical and Quantum Cosmology for
Intersecting p-branes | 10 pages, Latex., Submit. to Phys. Lett. B | Grav.Cosmol. 3 (1997) 243-249 | null | null | gr-qc | null | Multidimensional cosmological model describing the evolution of one Einstein
space of non-zero curvature and n Ricci-flat internal spaces is considered. The
action contains several dilatonic scalar fields and antisymmetric forms. When
forms are chosen to be proportional of volume forms of p-brane submanifolds of
inte... | [
{
"created": "Fri, 15 Aug 1997 20:29:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Grebeniuk",
"M. A.",
""
],
[
"Ivashchuk",
"V. D.",
""
],
[
"Melnikov",
"V. N.",
""
]
] | Multidimensional cosmological model describing the evolution of one Einstein space of non-zero curvature and n Ricci-flat internal spaces is considered. The action contains several dilatonic scalar fields and antisymmetric forms. When forms are chosen to be proportional of volume forms of p-brane submanifolds of intern... |
gr-qc/9409010 | null | Vladimir S. Mashkevich | Indeterministic Quantum Gravity | 11 pages, LATEX, Kiev Institute of Physics preprint IP 9/94 | null | null | null | gr-qc | null | A theory which claims to describe all the universe is advanced. It unifies
general relativity, quantum field theory, and indeterministic conception. Basic
entities are: classical metric tensor $g$, cosmic reference frame (including
cosmic time $t$), operator $T$ of energy-momentum tensor, Hamiltonian $H_t$,
and state... | [
{
"created": "Mon, 5 Sep 1994 20:40:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mashkevich",
"Vladimir S.",
""
]
] | A theory which claims to describe all the universe is advanced. It unifies general relativity, quantum field theory, and indeterministic conception. Basic entities are: classical metric tensor $g$, cosmic reference frame (including cosmic time $t$), operator $T$ of energy-momentum tensor, Hamiltonian $H_t$, and state v... |
1401.1074 | Bibhas Majhi Ranjan | Bibhas Ranjan Majhi | Connection between response parameter and anomaly coefficient in two
dimensional anomalous fluid | Revised version, to appear in JHEP | JHEP03(2014)001 | 10.1007/JHEP03(2014)001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In (1+1) dimensional hydrodynamics in presence of the gravitational
anomalies, the constitutive relations for the stress tensor contain the
response parameters $\bar{C}_1$, $\bar{C}_2$ and the gravitation anomaly
coefficients $c_g$, $c_w$. Here it is shown that they are related by the two
relations $\bar{C}_1 = 4\pi^... | [
{
"created": "Mon, 6 Jan 2014 13:37:15 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Feb 2014 08:13:07 GMT",
"version": "v2"
}
] | 2014-03-04 | [
[
"Majhi",
"Bibhas Ranjan",
""
]
] | In (1+1) dimensional hydrodynamics in presence of the gravitational anomalies, the constitutive relations for the stress tensor contain the response parameters $\bar{C}_1$, $\bar{C}_2$ and the gravitation anomaly coefficients $c_g$, $c_w$. Here it is shown that they are related by the two relations $\bar{C}_1 = 4\pi^2 ... |
1307.6167 | Marina Cort\^es | Marina Cort\^es and Lee Smolin | The Universe as a Process of Unique Events | 26 pages, 5 figures | Phys. Rev. D 90, 084007 (2014) | 10.1103/PhysRevD.90.084007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a new class of models of quantum space-time based on energetic
causal sets and show that under natural conditions space-time emerges from
them. These are causal sets whose causal links are labelled by energy and
momentum and conservation laws are applied at events. The models are motivated
by principles w... | [
{
"created": "Tue, 23 Jul 2013 17:29:39 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jul 2013 16:24:57 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Nov 2015 21:27:00 GMT",
"version": "v3"
}
] | 2016-02-22 | [
[
"Cortês",
"Marina",
""
],
[
"Smolin",
"Lee",
""
]
] | We describe a new class of models of quantum space-time based on energetic causal sets and show that under natural conditions space-time emerges from them. These are causal sets whose causal links are labelled by energy and momentum and conservation laws are applied at events. The models are motivated by principles we ... |
1403.6243 | Kent Yagi | Kent Yagi, Koutarou Kyutoku, George Pappas, Nicolas Yunes, Theocharis
A. Apostolatos | Effective No-Hair Relations for Neutron Stars and Quark Stars:
Relativistic Results | 36 pages, 14 figures; matches version published in PRD | Phys. Rev. D 89 124013 (2014) | 10.1103/PhysRevD.89.124013 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Astrophysical charge-free black holes are known to satisfy no-hair relations
through which all multipole moments can be specified in terms of just their
mass and spin angular momentum. We here investigate the possible existence of
no-hair-like relations among multipole moments for neutron stars and quark
stars that a... | [
{
"created": "Tue, 25 Mar 2014 06:52:41 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Sep 2014 17:35:14 GMT",
"version": "v2"
}
] | 2014-09-09 | [
[
"Yagi",
"Kent",
""
],
[
"Kyutoku",
"Koutarou",
""
],
[
"Pappas",
"George",
""
],
[
"Yunes",
"Nicolas",
""
],
[
"Apostolatos",
"Theocharis A.",
""
]
] | Astrophysical charge-free black holes are known to satisfy no-hair relations through which all multipole moments can be specified in terms of just their mass and spin angular momentum. We here investigate the possible existence of no-hair-like relations among multipole moments for neutron stars and quark stars that are... |
gr-qc/0404021 | Aleksandar Mikovic | A. Mikovic | Flat Spacetime Vacuum in Loop Quantum Gravity | 20 pages, 6 figures | Class.Quant.Grav.21:3909-3922,2004 | 10.1088/0256-307X/21/8/007 | null | gr-qc | null | We construct a state in the loop quantum gravity theory with zero
cosmological constant, which should correspond to the flat spacetime vacuum
solution. This is done by defining the loop transform coefficients of a flat
connection wavefunction in the holomorphic representation which satisfies all
the constraints of qu... | [
{
"created": "Tue, 6 Apr 2004 12:09:14 GMT",
"version": "v1"
}
] | 2009-01-16 | [
[
"Mikovic",
"A.",
""
]
] | We construct a state in the loop quantum gravity theory with zero cosmological constant, which should correspond to the flat spacetime vacuum solution. This is done by defining the loop transform coefficients of a flat connection wavefunction in the holomorphic representation which satisfies all the constraints of quan... |
gr-qc/9803027 | Vladimir M. Khatsymovsky | V.M.Khatsymovsky | Rotating vacuum wormhole | 10 pages, uses LaTeX, submitted to Physics Letters B | Phys.Lett. B429 (1998) 254-262 | 10.1016/S0370-2693(98)00448-1 | null | gr-qc | null | We investigate whether self-maintained vacuum traversible wormhole can exist
described by stationary but nonstatic metric. We consider metric being the sum
of static spherically symmetric one and a small nondiagonal component which
describes rotation sufficiently slow to be taken into account in the linear
approximat... | [
{
"created": "Fri, 6 Mar 1998 13:16:14 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Khatsymovsky",
"V. M.",
""
]
] | We investigate whether self-maintained vacuum traversible wormhole can exist described by stationary but nonstatic metric. We consider metric being the sum of static spherically symmetric one and a small nondiagonal component which describes rotation sufficiently slow to be taken into account in the linear approximatio... |
1611.03821 | \"Ozcan Sert | \"Ozcan Sert | Radiation Fluid Stars in the Non-minimally Coupled $Y(R)F^2$ Gravity | 21 pages, accepted for publication in EPJC | null | 10.1140/epjc/s10052-017-4664-5 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a non-minimally coupled gravity model in $ Y(R)F^2 $ form to
describe the radiation fluid stars which have the radiative equation of state
between the energy density $ \rho $ and the pressure $p$ as $\rho=3p $. Here
$F^2$ is the Maxwell invariant and $Y(R)$ is a function of the Ricci scalar
$R$. We give th... | [
{
"created": "Fri, 11 Nov 2016 19:25:02 GMT",
"version": "v1"
},
{
"created": "Sat, 28 Jan 2017 19:54:32 GMT",
"version": "v2"
}
] | 2017-03-08 | [
[
"Sert",
"Özcan",
""
]
] | We propose a non-minimally coupled gravity model in $ Y(R)F^2 $ form to describe the radiation fluid stars which have the radiative equation of state between the energy density $ \rho $ and the pressure $p$ as $\rho=3p $. Here $F^2$ is the Maxwell invariant and $Y(R)$ is a function of the Ricci scalar $R$. We give the ... |
1309.7827 | Behrouz Mirza | Maryam Aghaei Abchouyeh, Behrouz Mirza, Zeinab Sherkatghanad | Entropic force, running gravitational coupling and future singularities | 7 pages, 5 figures, references added | Gen Relativ Gravit (2014) 46:1617 | 10.1007/s10714-013-1617-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effects of a running gravitational coupling and the entropic force on
future singularities are considered. Although it is expected that the quantum
corrections remove the future singularities or change the singularity type,
treating the running gravitational coupling as a function of energy density is
found to ca... | [
{
"created": "Mon, 30 Sep 2013 12:59:49 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Feb 2014 05:37:04 GMT",
"version": "v2"
}
] | 2014-02-25 | [
[
"Abchouyeh",
"Maryam Aghaei",
""
],
[
"Mirza",
"Behrouz",
""
],
[
"Sherkatghanad",
"Zeinab",
""
]
] | The effects of a running gravitational coupling and the entropic force on future singularities are considered. Although it is expected that the quantum corrections remove the future singularities or change the singularity type, treating the running gravitational coupling as a function of energy density is found to caus... |
gr-qc/9511043 | null | David R Taylor and Roy Maartens | Almost-homogeneity of the universe in higher-order gravity | 14 pages LaTeX, no figures; to appear in General Relativity and
Gravitation | Gen.Rel.Grav. 27 (1995) 1309 | 10.1007/BF02153319 | RCG 95/06 | gr-qc | null | In the $R+\alpha R^2$ gravity theory, we show that if freely propagating
massless particles have an almost isotropic distribution, then the spacetime is
almost Friedmann-Robertson-Walker (FRW). This extends the result proved
recently in general relativity ($\alpha=0$), which is applicable to the
microwave background ... | [
{
"created": "Wed, 15 Nov 1995 12:29:05 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Taylor",
"David R",
""
],
[
"Maartens",
"Roy",
""
]
] | In the $R+\alpha R^2$ gravity theory, we show that if freely propagating massless particles have an almost isotropic distribution, then the spacetime is almost Friedmann-Robertson-Walker (FRW). This extends the result proved recently in general relativity ($\alpha=0$), which is applicable to the microwave background af... |
gr-qc/0006017 | Adrian P. Gentle | Leo C. Brewin and Adrian P. Gentle | On the convergence of Regge calculus to general relativity | Updated to match published version. Details of numerical calculations
added, several sections rewritten. 9 pages, 4 EPS figures | Class.Quant.Grav. 18 (2001) 517-526 | 10.1088/0264-9381/18/3/311 | LAUR-00-2300 | gr-qc | null | Motivated by a recent study casting doubt on the correspondence between Regge
calculus and general relativity in the continuum limit, we explore a mechanism
by which the simplicial solutions can converge whilst the residual of the Regge
equations evaluated on the continuum solutions does not. By directly
constructing... | [
{
"created": "Mon, 5 Jun 2000 23:05:23 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Mar 2001 19:14:04 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Brewin",
"Leo C.",
""
],
[
"Gentle",
"Adrian P.",
""
]
] | Motivated by a recent study casting doubt on the correspondence between Regge calculus and general relativity in the continuum limit, we explore a mechanism by which the simplicial solutions can converge whilst the residual of the Regge equations evaluated on the continuum solutions does not. By directly constructing s... |
gr-qc/9301015 | null | R.Penrose, R.D. Sorkin, and E. Woolgar | A Positive Mass Theorem Based on the Focusing and Retardation of Null
Geodesics | (replaced version corrects an errant TEX offset command -- those who
successfully TEXed the first version have no need to re-TEX) | null | null | null | gr-qc hep-th | null | A positive mass theorem for General Relativity Theory is proved. The proof is
4-dimensional in nature, and relies completely on arguments pertaining to
causal structure, the basic idea being that positive energy-density focuses
null geodesics, and correspondingly retards them, whereas a negative total mass
would adva... | [
{
"created": "Thu, 14 Jan 1993 20:00:57 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Jan 1993 21:00:19 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Penrose",
"R.",
""
],
[
"Sorkin",
"R. D.",
""
],
[
"Woolgar",
"E.",
""
]
] | A positive mass theorem for General Relativity Theory is proved. The proof is 4-dimensional in nature, and relies completely on arguments pertaining to causal structure, the basic idea being that positive energy-density focuses null geodesics, and correspondingly retards them, whereas a negative total mass would advanc... |
gr-qc/0010101 | T. P. Singh | Tomohiro Harada, Hideo Iguchi, Ken-ichi Nakao, T. P. Singh, Takahiro
Tanaka and Cenalo Vaz | Naked singularities and quantum gravity | 16 pages, paper rewritten into sections, conclusions unchanged, 4
references added, to appear in Phys. Rev. D (Rapid Communication) | Phys.Rev.D64:041501,2001 | 10.1103/PhysRevD.64.041501 | OSU-PHYS-178, WU-AP/115/00, YITP-00-56 | gr-qc | null | There are known models of spherical gravitational collapse in which the
collapse ends in a naked shell-focusing singularity for some initial data. If a
massless scalar field is quantized on the classical background provided by such
a star, it is found that the outgoing quantum flux of the scalar field diverges
in the... | [
{
"created": "Fri, 27 Oct 2000 05:49:48 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jun 2001 06:00:32 GMT",
"version": "v2"
}
] | 2009-12-31 | [
[
"Harada",
"Tomohiro",
""
],
[
"Iguchi",
"Hideo",
""
],
[
"Nakao",
"Ken-ichi",
""
],
[
"Singh",
"T. P.",
""
],
[
"Tanaka",
"Takahiro",
""
],
[
"Vaz",
"Cenalo",
""
]
] | There are known models of spherical gravitational collapse in which the collapse ends in a naked shell-focusing singularity for some initial data. If a massless scalar field is quantized on the classical background provided by such a star, it is found that the outgoing quantum flux of the scalar field diverges in the a... |
1608.03992 | Kimet Jusufi | Kimet Jusufi, Gordana Apostolovska | Hawking radiation of Dirac monopoles from the global monopole black hole
with quantum gravity effects | 8 pages, 1 figure, to appear in Astrophysics and Space Science | Astrophys Space Sci (2016) 361: 374 | 10.1007/s10509-016-2962-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the quantum tunneling of Dirac magnetic monopoles from
the global monopole black hole under quantum gravity effects. We start from the
modified Maxwell's equations and the Generalized Uncertainty Relation (GUP), to
recover the GUP corrected temperature for the global monopole black hole by
solv... | [
{
"created": "Sat, 13 Aug 2016 15:19:52 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Oct 2016 23:19:35 GMT",
"version": "v2"
}
] | 2016-11-10 | [
[
"Jusufi",
"Kimet",
""
],
[
"Apostolovska",
"Gordana",
""
]
] | In this paper we study the quantum tunneling of Dirac magnetic monopoles from the global monopole black hole under quantum gravity effects. We start from the modified Maxwell's equations and the Generalized Uncertainty Relation (GUP), to recover the GUP corrected temperature for the global monopole black hole by solvin... |
1911.04233 | Zurab Silagadze | S. Dhasmana, Z.K. Silagadze | Finsler space-time in light of Segal's principle | 6 pages, revtex4, to be published in Modern Physics Letters A. The
article is heavily based on arXiv:1609.08647 | Mod. Phys. Lett. A 35 (2020), 2050019 | 10.1142/S0217732320500194 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | ISIM(2) symmetry group of Cohen and Glashow's very special relativity is
unstable with respect to small deformations of its underlying algebraic
structure and according to Segal's principle cannot be a true symmetry of
nature. However, like special relativity, which is a very good description of
nature thanks to the ... | [
{
"created": "Fri, 1 Nov 2019 07:29:09 GMT",
"version": "v1"
}
] | 2020-03-09 | [
[
"Dhasmana",
"S.",
""
],
[
"Silagadze",
"Z. K.",
""
]
] | ISIM(2) symmetry group of Cohen and Glashow's very special relativity is unstable with respect to small deformations of its underlying algebraic structure and according to Segal's principle cannot be a true symmetry of nature. However, like special relativity, which is a very good description of nature thanks to the sm... |
1308.3771 | Gilbert Weinstein | Marcus Khuri, Gilbert Weinstein and Sumio Yamada | The Riemannian Penrose Inequality with Charge for Multiple Black Holes | 7 pages; minor revisions | Contemporary Mathematics, 653 (2015), 219-226 | null | null | gr-qc math-ph math.DG math.MP | http://creativecommons.org/licenses/by/3.0/ | We present a proof of the Riemannian Penrose inequality with charge $r\leq m
+ \sqrt{m^2-q^2}$, where $A=4\pi r^2$ is the area of the outermost apparent
horizon with possibly multiple connected components, $m$ is the total ADM mass,
and $q$ the total charge of a strongly asymptotically flat initial data set for
the E... | [
{
"created": "Sat, 17 Aug 2013 10:23:27 GMT",
"version": "v1"
},
{
"created": "Thu, 8 May 2014 16:37:51 GMT",
"version": "v2"
},
{
"created": "Tue, 9 Sep 2014 04:59:46 GMT",
"version": "v3"
}
] | 2015-12-04 | [
[
"Khuri",
"Marcus",
""
],
[
"Weinstein",
"Gilbert",
""
],
[
"Yamada",
"Sumio",
""
]
] | We present a proof of the Riemannian Penrose inequality with charge $r\leq m + \sqrt{m^2-q^2}$, where $A=4\pi r^2$ is the area of the outermost apparent horizon with possibly multiple connected components, $m$ is the total ADM mass, and $q$ the total charge of a strongly asymptotically flat initial data set for the Ein... |
gr-qc/0304053 | Carlos Molina Mendes | C. Molina | Quasinormal modes of d-dimensional spherical black holes with a near
extreme cosmological constant | 5 pages, REVTeX4, version to be published in Physical Review D | Phys.Rev. D68 (2003) 064007 | 10.1103/PhysRevD.68.064007 | 1565/2003 | gr-qc astro-ph hep-th | null | We derive an expression for the quasinormal modes of scalar perturbations in
near extreme d-dimensional Schwarzschild-de Sitter and Reissner-Nordstrom-de
Sitter black holes. We show that, in the near extreme limit, the dynamics of
the scalar field is characterized by a Poschl-Teller effective potential. The
results a... | [
{
"created": "Mon, 14 Apr 2003 18:58:10 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Aug 2003 03:32:30 GMT",
"version": "v2"
},
{
"created": "Fri, 26 Sep 2003 14:12:35 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Molina",
"C.",
""
]
] | We derive an expression for the quasinormal modes of scalar perturbations in near extreme d-dimensional Schwarzschild-de Sitter and Reissner-Nordstrom-de Sitter black holes. We show that, in the near extreme limit, the dynamics of the scalar field is characterized by a Poschl-Teller effective potential. The results are... |
gr-qc/0701036 | Marcello Ortaggio | Marcello Ortaggio | Higher dimensional spacetimes with a geodesic, shearfree, twistfree and
expanding null congruence | 1+12 pages. Proceedings of the XVII SIGRAV Conference, Turin,
September 4--7, 2006. v2: minor changes | null | null | null | gr-qc hep-th | null | We present the complete family of higher dimensional spacetimes that admit a
geodesic, shearfree, twistfree and expanding null congruence, thus extending
the well-known D=4 class of Robinson-Trautman solutions. Einstein's equations
are solved for empty space with an arbitrary cosmological constant and for
aligned pur... | [
{
"created": "Fri, 5 Jan 2007 15:52:42 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Aug 2007 14:30:35 GMT",
"version": "v2"
}
] | 2007-08-30 | [
[
"Ortaggio",
"Marcello",
""
]
] | We present the complete family of higher dimensional spacetimes that admit a geodesic, shearfree, twistfree and expanding null congruence, thus extending the well-known D=4 class of Robinson-Trautman solutions. Einstein's equations are solved for empty space with an arbitrary cosmological constant and for aligned pure ... |
gr-qc/9605045 | Tigran Aivazian | Tigran Aivazian | Cosmological Solution To Einstein-Vlasov System | 7 pages, LaTex, no figures minor corrections | null | null | null | gr-qc | null | Einstein-Vlasov system is solved for a homogeneous isotropic spacetime with
positive curvature. In the case of the Universe consisting of massless
particles the equation for R(t) is solved analytically.
| [
{
"created": "Mon, 20 May 1996 16:32:37 GMT",
"version": "v1"
},
{
"created": "Tue, 28 May 1996 20:08:14 GMT",
"version": "v2"
},
{
"created": "Thu, 30 May 1996 20:02:51 GMT",
"version": "v3"
},
{
"created": "Wed, 5 Jun 1996 22:40:46 GMT",
"version": "v4"
}
] | 2008-02-03 | [
[
"Aivazian",
"Tigran",
""
]
] | Einstein-Vlasov system is solved for a homogeneous isotropic spacetime with positive curvature. In the case of the Universe consisting of massless particles the equation for R(t) is solved analytically. |
2407.04627 | Ribamar Reis R. R. | Lucas T. Santana, Jo\~ao C. Lobato, Ribamar R. R. Reis, Maur\'icio O.
Calv\~ao | A unified approach to coupled homogeneous linear wave propagation in
generic gravity | 24 pages, 2 figures | null | null | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | Wave propagation is a common occurrence in all of physics. A linear
approximation provides a simpler way to describe various fields related to
observable phenomena in laboratory physics as well as astronomy and cosmology,
allowing us to probe gravitation through its effect on the trajectories of
particles associated ... | [
{
"created": "Fri, 5 Jul 2024 16:34:18 GMT",
"version": "v1"
}
] | 2024-07-08 | [
[
"Santana",
"Lucas T.",
""
],
[
"Lobato",
"João C.",
""
],
[
"Reis",
"Ribamar R. R.",
""
],
[
"Calvão",
"Maurício O.",
""
]
] | Wave propagation is a common occurrence in all of physics. A linear approximation provides a simpler way to describe various fields related to observable phenomena in laboratory physics as well as astronomy and cosmology, allowing us to probe gravitation through its effect on the trajectories of particles associated wi... |
2308.11535 | Akshat Pandey | Akshat Pandey | Geodesic congruences in acoustic spacetimes and the role of Raychaudhuri
equation | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | It has been known that the propagation of sound in fluids can be used to
model acoustic spacetimes. These acoustic spacetimes offer analogue models for
gravity. We use the Raychaudhuri equation to study the propagation of sound in
these fluids, which, via the Eikonal approximation, correspond to null geodesic
congrue... | [
{
"created": "Thu, 17 Aug 2023 18:59:48 GMT",
"version": "v1"
}
] | 2023-08-23 | [
[
"Pandey",
"Akshat",
""
]
] | It has been known that the propagation of sound in fluids can be used to model acoustic spacetimes. These acoustic spacetimes offer analogue models for gravity. We use the Raychaudhuri equation to study the propagation of sound in these fluids, which, via the Eikonal approximation, correspond to null geodesic congruenc... |
gr-qc/9311010 | Jerzy Lewandowski | Abhay Ashtekar and Jerzy Lewandowski | Representation Theory of Analytic Holonomy C* Algebras | 42 pages, To be published in ``Knots and Quantum Gravity'' (ed.
J.Baez, Oxford U.Press) | null | null | null | gr-qc alg-geom hep-th math.AG | null | Integral calculus on the space of gauge equivalent connections is developed.
Loops, knots, links and graphs feature prominently in this description. The
framework is well--suited for quantization of diffeomorphism invariant theories
of connections.
The general setting is provided by the abelian C* algebra of functi... | [
{
"created": "Sun, 7 Nov 1993 00:45:18 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Nov 1993 14:41:01 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Lewandowski",
"Jerzy",
""
]
] | Integral calculus on the space of gauge equivalent connections is developed. Loops, knots, links and graphs feature prominently in this description. The framework is well--suited for quantization of diffeomorphism invariant theories of connections. The general setting is provided by the abelian C* algebra of functions ... |
1610.09952 | Eugen Radu | Yves Brihaye and Eugen Radu | Remarks on the Taub-NUT solution in Chern-Simons modified gravity | 10 pages, 3 figures | null | 10.1016/j.physletb.2016.11.055 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the generalization of the NUT spacetime in General Relativity (GR)
within the framework of the (dynamical) Einstein--Chern-Simons (ECS) theory
with a massless scalar field. These configurations approach asymptotically the
NUT spacetime and are characterized by the `electric' and `magnetic' mass
parameters ... | [
{
"created": "Mon, 31 Oct 2016 14:51:08 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Nov 2016 13:23:58 GMT",
"version": "v2"
}
] | 2016-12-07 | [
[
"Brihaye",
"Yves",
""
],
[
"Radu",
"Eugen",
""
]
] | We discuss the generalization of the NUT spacetime in General Relativity (GR) within the framework of the (dynamical) Einstein--Chern-Simons (ECS) theory with a massless scalar field. These configurations approach asymptotically the NUT spacetime and are characterized by the `electric' and `magnetic' mass parameters an... |
1506.07484 | Francesco Cianfrani dr | Emanuele Alesci, Francesco Cianfrani | Quantum Reduced Loop Gravity | 6 pages, proceedings of Frontiers of Fundamental Physics 14 - FFP14,
15-18 July 2014, Marseille, accepted for publication in Proceedings of
Science | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum Reduced Loop Gravity provides a promising framework for a consistent
characterization of the early Universe dynamics. Inspired by BKL conjecture, a
flat Universe is described as a collection of Bianchi I homogeneous patches.
The resulting quantum dynamics is described by the scalar constraint operator,
whose ... | [
{
"created": "Wed, 24 Jun 2015 17:59:07 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Alesci",
"Emanuele",
""
],
[
"Cianfrani",
"Francesco",
""
]
] | Quantum Reduced Loop Gravity provides a promising framework for a consistent characterization of the early Universe dynamics. Inspired by BKL conjecture, a flat Universe is described as a collection of Bianchi I homogeneous patches. The resulting quantum dynamics is described by the scalar constraint operator, whose ma... |
2106.12564 | Vittorio De Falco Dr | Vittorio De Falco, Mariafelicia De Laurentis, Salvatore Capozziello | Epicyclic frequencies in static and spherically symmetric wormhole
geometries | 11 pages, 6 figures, 2 tables; accepted for publication on Phys. Rev.
D on 23/06/2021 | null | 10.1103/PhysRevD.104.024053 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | The measurement of the epicyclic frequencies is a widely used astrophysical
technique to infer information on a given self-gravitating system and on the
related gravity background. We derive their explicit expressions in static and
spherically symmetric wormhole spacetimes. We discuss how these theoretical
results ca... | [
{
"created": "Wed, 23 Jun 2021 17:45:16 GMT",
"version": "v1"
}
] | 2021-08-04 | [
[
"De Falco",
"Vittorio",
""
],
[
"De Laurentis",
"Mariafelicia",
""
],
[
"Capozziello",
"Salvatore",
""
]
] | The measurement of the epicyclic frequencies is a widely used astrophysical technique to infer information on a given self-gravitating system and on the related gravity background. We derive their explicit expressions in static and spherically symmetric wormhole spacetimes. We discuss how these theoretical results can ... |
2011.11086 | Alessio Marrani | Sergio Cacciatori, Alessio Marrani, Federico Re | On Generalized Lemaitre-Tolman-Bondi Metric. Fractal Matter at the end
of Matter-Antimatter Recombination | 1+26 pages, 0 figures | null | 10.1142/S0218271821500863 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many recent researches have investigated the deviations from the Friedmannian
cosmological model, as well as their consequences on unexplained cosmological
phenomena, such as dark matter and the acceleration of the Universe. On the one
hand, a first order perturbative study of matter inhomogeneity returned a
partial ... | [
{
"created": "Sun, 22 Nov 2020 18:55:28 GMT",
"version": "v1"
}
] | 2021-09-22 | [
[
"Cacciatori",
"Sergio",
""
],
[
"Marrani",
"Alessio",
""
],
[
"Re",
"Federico",
""
]
] | Many recent researches have investigated the deviations from the Friedmannian cosmological model, as well as their consequences on unexplained cosmological phenomena, such as dark matter and the acceleration of the Universe. On the one hand, a first order perturbative study of matter inhomogeneity returned a partial ex... |
1706.03855 | Jose Luis Flores | Jos\'e L. Flores, Miguel S\'anchez | Ehlers-Kundt Conjecture about Gravitational Waves and Dynamical Systems | Final version with minor changes and some new references | Journal of Differential Equations, Volume 268, Issue 12, 5 June
2020, Pages 7505-7534 | 10.1016/j.jde.2019.11.061 | null | gr-qc math-ph math.CV math.DG math.DS math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ehlers-Kundt conjecture is a physical assertion about the fundamental role of
plane waves for the description of gravitational waves. Mathematically, it
becomes equivalent to a problem on the Euclidean plane ${\mathbb R}^2$ with a
very simple formulation in Classical Mechanics: given a non-necessarily
autonomous pote... | [
{
"created": "Mon, 12 Jun 2017 21:16:38 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Nov 2017 06:27:51 GMT",
"version": "v2"
},
{
"created": "Fri, 29 Jun 2018 04:59:37 GMT",
"version": "v3"
},
{
"created": "Tue, 26 Nov 2019 18:19:27 GMT",
"version": "v4"
}
] | 2020-09-28 | [
[
"Flores",
"José L.",
""
],
[
"Sánchez",
"Miguel",
""
]
] | Ehlers-Kundt conjecture is a physical assertion about the fundamental role of plane waves for the description of gravitational waves. Mathematically, it becomes equivalent to a problem on the Euclidean plane ${\mathbb R}^2$ with a very simple formulation in Classical Mechanics: given a non-necessarily autonomous potent... |
1007.3306 | Jose Socorro Garcia | J. Socorro, M. Sabido, M.A. S\'anchez G. and M.G. Fr\'ias Palos | Anisotropic cosmology in S\'aez-Ballester theory: classical and quantum
solutions | 8 pages, Latex2e, | Rev.Mex.Fis.56:166-171,2010 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the S\'aez-Ballester theory on anisotropic Bianchi I cosmological
model, with barotropic fluid and cosmological constant. We obtain the classical
solution by using the Hamilton-Jacobi approach. Also the quantum regime is
constructed and exact solutions to the Wheeler-DeWitt equation are found.
| [
{
"created": "Mon, 19 Jul 2010 23:23:17 GMT",
"version": "v1"
}
] | 2016-08-14 | [
[
"Socorro",
"J.",
""
],
[
"Sabido",
"M.",
""
],
[
"G.",
"M. A. Sánchez",
""
],
[
"Palos",
"M. G. Frías",
""
]
] | We use the S\'aez-Ballester theory on anisotropic Bianchi I cosmological model, with barotropic fluid and cosmological constant. We obtain the classical solution by using the Hamilton-Jacobi approach. Also the quantum regime is constructed and exact solutions to the Wheeler-DeWitt equation are found. |
1312.1825 | Mariafelicia De Laurentis Dr. | Salvatore Capozziello, Mariafelicia De Laurentis, Orlando Luongo and
Alan Cosimo Ruggeri | Cosmographic Constraints and Cosmic Fluids | 45 pages, 1 figure | Galaxies 2013, 1(3), 216-260; | 10.3390/galaxies1030216 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of reproducing dark energy effects is reviewed here with
particular interest devoted to cosmography. We summarize some of the most
relevant cosmological models, based on the assumption that the corresponding
barotropic equations of state evolve as the universe expands, giving rise to
the accelerated expan... | [
{
"created": "Fri, 6 Dec 2013 10:33:34 GMT",
"version": "v1"
}
] | 2013-12-09 | [
[
"Capozziello",
"Salvatore",
""
],
[
"De Laurentis",
"Mariafelicia",
""
],
[
"Luongo",
"Orlando",
""
],
[
"Ruggeri",
"Alan Cosimo",
""
]
] | The problem of reproducing dark energy effects is reviewed here with particular interest devoted to cosmography. We summarize some of the most relevant cosmological models, based on the assumption that the corresponding barotropic equations of state evolve as the universe expands, giving rise to the accelerated expansi... |
gr-qc/0402009 | Giovanni Amelino-Camelia | Giovanni Amelino-Camelia | A perspective on Quantum Gravity Phenomenology | 15 pages, LaTex. These notes provided the basis for the ``summary
talk" which I gave as chairman of the QG1 session (``Quantum Gravity
Phenomenology") at the "10th Marcel Grossmann Meeting on General Relativity"
(Rio de Janeiro, July 20-26, 2003). V2: Additional remarks (especially on
synchrotron radiation) and... | null | 10.1142/9789812704030_0015 | null | gr-qc | null | I give a brief overview of some Quantum-Gravity-Phenomenology research lines,
focusing on studies of cosmic rays and gamma-ray bursts that concern the fate
of Lorentz symmetry in quantum spacetime. I also stress that the most valuable
phenomenological analyses should not mix too many conjectured new features of
quant... | [
{
"created": "Mon, 2 Feb 2004 21:02:12 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Feb 2004 07:26:23 GMT",
"version": "v2"
}
] | 2016-11-09 | [
[
"Amelino-Camelia",
"Giovanni",
""
]
] | I give a brief overview of some Quantum-Gravity-Phenomenology research lines, focusing on studies of cosmic rays and gamma-ray bursts that concern the fate of Lorentz symmetry in quantum spacetime. I also stress that the most valuable phenomenological analyses should not mix too many conjectured new features of quantum... |
1709.02367 | \"Ozg\"ur Akarsu | Ozgur Akarsu, Nihan Katirci, Suresh Kumar | Cosmic acceleration in dust only Universe via energy-momentum powered
gravity | 15 pages, 7 figures, 2 tables | Phys. Rev. D 97, 024011 (2018) | 10.1103/PhysRevD.97.024011 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a modified theory of gravitation constructed by the addition of
the term $f(T_{\mu\nu}T^{\mu\nu})$ to the Einstein-Hilbert action, and
elaborate a particular case
$f(T_{\mu\nu}T^{\mu\nu})=\alpha(T_{\mu\nu}T^{\mu\nu})^{\eta}$, where $\alpha$
and $\eta$ are real constants, dubbed as energy-momentum powered g... | [
{
"created": "Thu, 7 Sep 2017 17:39:09 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Sep 2017 16:29:24 GMT",
"version": "v2"
},
{
"created": "Thu, 8 Feb 2018 18:33:13 GMT",
"version": "v3"
}
] | 2018-02-09 | [
[
"Akarsu",
"Ozgur",
""
],
[
"Katirci",
"Nihan",
""
],
[
"Kumar",
"Suresh",
""
]
] | We propose a modified theory of gravitation constructed by the addition of the term $f(T_{\mu\nu}T^{\mu\nu})$ to the Einstein-Hilbert action, and elaborate a particular case $f(T_{\mu\nu}T^{\mu\nu})=\alpha(T_{\mu\nu}T^{\mu\nu})^{\eta}$, where $\alpha$ and $\eta$ are real constants, dubbed as energy-momentum powered gra... |
0912.0432 | Taeyoon Moon | Tae Yoon Moon, Joohan Lee and Phillial Oh | Conformal Invariance in Einstein-Cartan-Weyl space | 10 pages, version to appear MPLA | Mod.Phys.Lett.A25:3129-3143,2010 | 10.1142/S0217732310034201 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider conformally invariant form of the actions in Einstein, Weyl,
Einstein-Cartan and Einstein-Cartan-Weyl space in general dimensions($>2$) and
investigate the relations among them. In Weyl space, the observational
consistency condition for the vector field determining non-metricity of the
connection can be o... | [
{
"created": "Wed, 2 Dec 2009 15:19:34 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Dec 2009 15:36:48 GMT",
"version": "v2"
},
{
"created": "Mon, 8 Nov 2010 04:11:05 GMT",
"version": "v3"
}
] | 2010-11-23 | [
[
"Moon",
"Tae Yoon",
""
],
[
"Lee",
"Joohan",
""
],
[
"Oh",
"Phillial",
""
]
] | We consider conformally invariant form of the actions in Einstein, Weyl, Einstein-Cartan and Einstein-Cartan-Weyl space in general dimensions($>2$) and investigate the relations among them. In Weyl space, the observational consistency condition for the vector field determining non-metricity of the connection can be obt... |
gr-qc/9602014 | Yuri N. Obukhov | Yuri N. Obukhov and Friedrich W. Hehl | On the Relation Between Quadratic and Linear Curvature Lagrangians in
Poincar\'e Gauge Gravity | 13 pages, RevTex | Acta Phys.Polon.B27:2685-2694,1996 | null | null | gr-qc astro-ph hep-th | null | We discuss the choice of the Lagrangian in the Poincar\'e gauge theory of
gravity. Drawing analogies to earlier de Sitter gauge models, we point out the
possibility of deriving the Einstein-Cartan Lagrangian {\it without}
cosmological term from a {\it modified} quadratic curvature invariant of {\it
topological} type.... | [
{
"created": "Thu, 8 Feb 1996 18:57:17 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Obukhov",
"Yuri N.",
""
],
[
"Hehl",
"Friedrich W.",
""
]
] | We discuss the choice of the Lagrangian in the Poincar\'e gauge theory of gravity. Drawing analogies to earlier de Sitter gauge models, we point out the possibility of deriving the Einstein-Cartan Lagrangian {\it without} cosmological term from a {\it modified} quadratic curvature invariant of {\it topological} type. |
2310.07537 | Reginald Christian Bernardo | Reginald Christian Bernardo and Kin-Wang Ng | Beyond the Hellings-Downs curve: Non-Einsteinian gravitational waves in
pulsar timing array correlations | 8 pages + refs, 6 figures, comments welcome | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent astronomical milestone by the pulsar timing arrays (PTA) has
revealed galactic-size gravitational waves (GW) in the form of a stochastic
gravitational wave background (SGWB), correlating the radio pulses emitted by
millisecond pulsars. This draws the outstanding questions toward the origin and
the nature o... | [
{
"created": "Wed, 11 Oct 2023 14:40:52 GMT",
"version": "v1"
}
] | 2023-10-12 | [
[
"Bernardo",
"Reginald Christian",
""
],
[
"Ng",
"Kin-Wang",
""
]
] | The recent astronomical milestone by the pulsar timing arrays (PTA) has revealed galactic-size gravitational waves (GW) in the form of a stochastic gravitational wave background (SGWB), correlating the radio pulses emitted by millisecond pulsars. This draws the outstanding questions toward the origin and the nature of ... |
1205.4792 | Dao-Jun Liu | Dao-Jun Liu, Bin Yang, Yong-Jia Zhai, Xin-Zhou Li | Quasinormal modes for asymptotic safe black holes | 11 pages, 1 figures, accepted for publication in CQG. arXiv admin
note: text overlap with arXiv:1007.1317 | null | 10.1088/0264-9381/29/14/145009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Under the hypothesis of asymptotic safety of gravity, the static, spherically
symmetric black hole solutions in the infrared limit are corrected by
non-perturbative effects. Specifically, the metric is modified by the running
of gravitational couplings. In this work, we investigate the effects of this
correction to t... | [
{
"created": "Tue, 22 May 2012 03:20:04 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Liu",
"Dao-Jun",
""
],
[
"Yang",
"Bin",
""
],
[
"Zhai",
"Yong-Jia",
""
],
[
"Li",
"Xin-Zhou",
""
]
] | Under the hypothesis of asymptotic safety of gravity, the static, spherically symmetric black hole solutions in the infrared limit are corrected by non-perturbative effects. Specifically, the metric is modified by the running of gravitational couplings. In this work, we investigate the effects of this correction to the... |
1203.5070 | Hirotaka Yoshino | Hirotaka Yoshino, Hideo Kodama | Bosenova collapse of axion cloud around a rotating black hole | 38 pages, 18 figures | Prog. Theor. Phys. 128 (2012), 153-190 | 10.1143/PTP.128.153 | KEK-TH-1530 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by possible existence of stringy axions with ultralight mass, we
study the behavior of an axion field around a rapidly rotating black hole (BH)
obeying the sine-Gordon equation by numerical simulations. Due to superradiant
instability, the axion field extracts the rotational energy of the BH and the
nonline... | [
{
"created": "Thu, 22 Mar 2012 18:22:03 GMT",
"version": "v1"
}
] | 2012-08-03 | [
[
"Yoshino",
"Hirotaka",
""
],
[
"Kodama",
"Hideo",
""
]
] | Motivated by possible existence of stringy axions with ultralight mass, we study the behavior of an axion field around a rapidly rotating black hole (BH) obeying the sine-Gordon equation by numerical simulations. Due to superradiant instability, the axion field extracts the rotational energy of the BH and the nonlinear... |
1508.03119 | Hajime Sotani | Hajime Sotani and Umpei Miyamoto | Strong gravitational lensing by an electrically charged black hole in
Eddington-inspired Born-Infeld gravity | accepted for publication in PRD | Phys. Rev. D 92, 044052 (2015) | 10.1103/PhysRevD.92.044052 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We systematically examine the properties of null geodesics around an
electrically charged, asymptotically flat black hole in Eddington-inspired
Born-Infeld gravity, varying the electric charge of black hole and the coupling
constant in the theory. We find that the radius of the unstable circular orbit
for massless pa... | [
{
"created": "Thu, 13 Aug 2015 05:04:49 GMT",
"version": "v1"
}
] | 2015-09-30 | [
[
"Sotani",
"Hajime",
""
],
[
"Miyamoto",
"Umpei",
""
]
] | We systematically examine the properties of null geodesics around an electrically charged, asymptotically flat black hole in Eddington-inspired Born-Infeld gravity, varying the electric charge of black hole and the coupling constant in the theory. We find that the radius of the unstable circular orbit for massless part... |
1403.5985 | Abigail Alvarez Dr. Sc. | Abigail Alvarez, Eloy Ay\'on-Beato, Hern\'an A. Gonz\'alez and Mokhtar
Hassa\"ine | Nonlinearly charged Lifshitz black holes for any exponent $z>1$ | null | JHEP06(2014)041 | 10.1007/JHEP06(2014)041 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Charged Lifshitz black holes for the Einstein-Proca-Maxwell system with a
negative cosmological constant in arbitrary dimension $D$ are known only if the
dynamical critical exponent is fixed as $z=2(D-2)$. In the present work, we
show that these configurations can be extended to much more general charged
black holes ... | [
{
"created": "Mon, 24 Mar 2014 14:59:39 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jan 2015 17:43:18 GMT",
"version": "v2"
}
] | 2015-01-28 | [
[
"Alvarez",
"Abigail",
""
],
[
"Ayón-Beato",
"Eloy",
""
],
[
"González",
"Hernán A.",
""
],
[
"Hassaïne",
"Mokhtar",
""
]
] | Charged Lifshitz black holes for the Einstein-Proca-Maxwell system with a negative cosmological constant in arbitrary dimension $D$ are known only if the dynamical critical exponent is fixed as $z=2(D-2)$. In the present work, we show that these configurations can be extended to much more general charged black holes wh... |
0905.4353 | Valery Kiselev | V.V.Kiselev, S.A.Timofeev | Quasiattractor in models of new and chaotic inflation | 10 pages, 2 eps-figures, revtex4, submitted to Gen.Rel.Grav | Gen.Rel.Grav.42:183-197,2010 | 10.1007/s10714-009-0827-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inflation with a scalar-field potential of the form \lambda (\phi^2-v^2)^2
can be described in terms of a parametrical attractor with critical points,
whose driftage depends on the control value of the slowly changing Hubble rate.
The method allows us to easily obtain theoretical expressions for fluctuations
of inhom... | [
{
"created": "Wed, 27 May 2009 08:09:34 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Kiselev",
"V. V.",
""
],
[
"Timofeev",
"S. A.",
""
]
] | Inflation with a scalar-field potential of the form \lambda (\phi^2-v^2)^2 can be described in terms of a parametrical attractor with critical points, whose driftage depends on the control value of the slowly changing Hubble rate. The method allows us to easily obtain theoretical expressions for fluctuations of inhomog... |
2403.06147 | Ekaterina Pozdeeva | E.O. Pozdeeva, M.A. Skugoreva, A.V. Toporensky, S.Yu. Vernov | New slow-roll approximations for inflation in Einstein-Gauss-Bonnet
gravity | 20 pages, 6 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose new slow-roll approximations for inflationary models with the
Gauss-Bonnet term. We find more accurate expressions of the standard slow-roll
parameters as functions of the scalar field. To check the accuracy of
approximations considered we construct inflationary models with quadratic and
quartic monomial p... | [
{
"created": "Sun, 10 Mar 2024 09:33:39 GMT",
"version": "v1"
}
] | 2024-03-12 | [
[
"Pozdeeva",
"E. O.",
""
],
[
"Skugoreva",
"M. A.",
""
],
[
"Toporensky",
"A. V.",
""
],
[
"Vernov",
"S. Yu.",
""
]
] | We propose new slow-roll approximations for inflationary models with the Gauss-Bonnet term. We find more accurate expressions of the standard slow-roll parameters as functions of the scalar field. To check the accuracy of approximations considered we construct inflationary models with quadratic and quartic monomial pot... |
1204.4225 | Diego Gonzalez | Diego Gonzalez, Merced Montesinos, Mercedes Velazquez | Gauge and spacetime connections in the Plebanski formulation of complex
general relativity | LaTeX File | null | null | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Plebanski formulation of complex general relativity is given in terms of
variables valued in the complexification of the $so(3)$ Lie algebra. Therefore,
it is genuinely a gauge theory that is also diffeomorphism-invariant. For this
reason, the way that the Levi-Civita connection emerges from this formulation
is n... | [
{
"created": "Wed, 18 Apr 2012 23:50:12 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Jan 2013 22:06:45 GMT",
"version": "v2"
}
] | 2013-01-28 | [
[
"Gonzalez",
"Diego",
""
],
[
"Montesinos",
"Merced",
""
],
[
"Velazquez",
"Mercedes",
""
]
] | The Plebanski formulation of complex general relativity is given in terms of variables valued in the complexification of the $so(3)$ Lie algebra. Therefore, it is genuinely a gauge theory that is also diffeomorphism-invariant. For this reason, the way that the Levi-Civita connection emerges from this formulation is not... |
gr-qc/9209002 | David Garfinkle | David Garfinkle | Results on exact solutions of low energy string theory | 8 pages, plain tex | Phys.Rev. D46 (1992) 4286-4288 | 10.1103/PhysRevD.46.4286 | null | gr-qc | null | A family of solutions to low energy string theory is found. These solutions
represent waves traveling along "extremal black strings"
| [
{
"created": "Sat, 5 Sep 1992 15:11:44 GMT",
"version": "v1"
},
{
"created": "Sat, 31 Oct 1992 20:08:55 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Garfinkle",
"David",
""
]
] | A family of solutions to low energy string theory is found. These solutions represent waves traveling along "extremal black strings" |
1807.07550 | Bjoern S. Schmekel | Bjoern S. Schmekel | Quasi-Local Energy of a Rotating Object Described by Kerr Spacetime | 9 pages, 6 figures | Phys. Rev. D 98, 104051 (2018) | 10.1103/PhysRevD.98.104051 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Brown-York quasi-local energy of a rotating black hole described by the
Kerr metric and enclosed by a fixed-radius surface is calculated by direct
computation. No special assumptions on the angular momentum or the radial
coordinate in Boyer-Lindquist coordinates were placed. The arbitrary reference
term has been ... | [
{
"created": "Thu, 19 Jul 2018 17:42:05 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Aug 2018 06:52:40 GMT",
"version": "v2"
},
{
"created": "Sat, 17 Nov 2018 21:39:59 GMT",
"version": "v3"
}
] | 2018-12-05 | [
[
"Schmekel",
"Bjoern S.",
""
]
] | The Brown-York quasi-local energy of a rotating black hole described by the Kerr metric and enclosed by a fixed-radius surface is calculated by direct computation. No special assumptions on the angular momentum or the radial coordinate in Boyer-Lindquist coordinates were placed. The arbitrary reference term has been se... |
1810.06211 | Sergey L Cherkas | S.L. Cherkas, V.L. Kalashnikov | The equation of vacuum state and the structure formation in universe | 15 pages | Nonlin. Phenom. Complex Syst. 23 (2020) 332-337 | 10.33581/1561-4085-2020-23-3-332-337 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The vacuum is considered as some fluid emergent from the zero-point
fluctuations of the quantum fields contributing to the vacuum energy density
and pressure. The equation of vacuum state and the speed of vacuum sound-waves
are deduced under the assumption of zero vacuum entropy. The evolution of the
background space... | [
{
"created": "Mon, 15 Oct 2018 07:56:56 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jun 2020 14:13:58 GMT",
"version": "v2"
}
] | 2021-08-24 | [
[
"Cherkas",
"S. L.",
""
],
[
"Kalashnikov",
"V. L.",
""
]
] | The vacuum is considered as some fluid emergent from the zero-point fluctuations of the quantum fields contributing to the vacuum energy density and pressure. The equation of vacuum state and the speed of vacuum sound-waves are deduced under the assumption of zero vacuum entropy. The evolution of the background space-t... |
1703.02143 | Don Marolf | Donald Marolf | The Black Hole information problem: past, present, and future | Key Issues Review for Reports on Progress of Physics, 20 pages, minor
changes | null | 10.1088/1361-6633/aa77cc | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a brief overview of the black hole information problem emphasizing
fundamental issues and recent proposals for its resolution. The focus is on
broad perspective and providing a guide to current literature rather than
presenting full details. We concentrate on resolutions restoring naive
unitarity.
| [
{
"created": "Mon, 6 Mar 2017 22:53:43 GMT",
"version": "v1"
},
{
"created": "Thu, 25 May 2017 22:31:06 GMT",
"version": "v2"
}
] | 2017-08-02 | [
[
"Marolf",
"Donald",
""
]
] | We give a brief overview of the black hole information problem emphasizing fundamental issues and recent proposals for its resolution. The focus is on broad perspective and providing a guide to current literature rather than presenting full details. We concentrate on resolutions restoring naive unitarity. |
1912.07058 | Ka - Wai Chung | Ka-Wai Chung, Tjonnie Guang Feng Li | Probing the Purely Ingoing Nature of the Black-hole Event Horizon | 17 pages, 2 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the most fundamental results of general relativity is that the event
horizon of black hole is purely ingoing. On the other hand,
semiclassical-gravity effects, such as particle creation and the quantization
of black-hole area, suggest that black holes can emit energy. Since a black
hole is characterized by the... | [
{
"created": "Sun, 15 Dec 2019 15:29:49 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Oct 2020 12:17:38 GMT",
"version": "v2"
}
] | 2020-10-26 | [
[
"Chung",
"Ka-Wai",
""
],
[
"Li",
"Tjonnie Guang Feng",
""
]
] | One of the most fundamental results of general relativity is that the event horizon of black hole is purely ingoing. On the other hand, semiclassical-gravity effects, such as particle creation and the quantization of black-hole area, suggest that black holes can emit energy. Since a black hole is characterized by the p... |
0705.2984 | Wei He | Bin Chen, Wei He | Hawking Radiation of Black Rings from Anomalies | 15 pages,Latex; revised version, typos corrected, reference added; | Class.Quant.Grav.25:135011,2008 | 10.1088/0264-9381/25/13/135011 | null | gr-qc hep-th | null | We derive Hawking radiation of 5-dimensional black rings from gauge and
gravitational anomalies using the method proposed by Robinson and Wilczek. We
find as in the black hole case, the problem could reduce to a (1+1) dimensional
field theory and the anomalies result in correct Hawking temperature for
neutral,dipole ... | [
{
"created": "Mon, 21 May 2007 14:02:37 GMT",
"version": "v1"
},
{
"created": "Tue, 29 May 2007 13:19:32 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Chen",
"Bin",
""
],
[
"He",
"Wei",
""
]
] | We derive Hawking radiation of 5-dimensional black rings from gauge and gravitational anomalies using the method proposed by Robinson and Wilczek. We find as in the black hole case, the problem could reduce to a (1+1) dimensional field theory and the anomalies result in correct Hawking temperature for neutral,dipole an... |
0802.0233 | Richard Gott III | J. Richard Gott III | Boltzmann Brains--I'd Rather See Than Be One | 18 pages | null | null | null | gr-qc | null | A perceived problem with the standard flat-lambda model is that in the far
future spacetime becomes an exponentially expanding de Sitter space, filled
with Gibbons-Hawking thermal radiation, and given infinite time there will
appear an infinite number of Boltzmann Brains (BB's) per finite co-moving
volume today. If B... | [
{
"created": "Sat, 2 Feb 2008 04:05:05 GMT",
"version": "v1"
}
] | 2008-02-05 | [
[
"Gott",
"J. Richard",
"III"
]
] | A perceived problem with the standard flat-lambda model is that in the far future spacetime becomes an exponentially expanding de Sitter space, filled with Gibbons-Hawking thermal radiation, and given infinite time there will appear an infinite number of Boltzmann Brains (BB's) per finite co-moving volume today. If BB'... |
1504.05496 | Mahouton J. Stephane Houndjo Dr | E. H. Baffou, M. J. S. Houndjo, M. E. Rodrigues, A. V. Kpadonou and J.
Tossa | Cosmological Evolution in f(R,T) theory with Collisional Matter | 17 pages and 8 figues | Phys.Rev. D 92 (2015) 8, 084043 | 10.1103/PhysRevD.92.084043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evolution of the cosmological parameters, namely, the
deceleration parameter $q(z)$ and the parameter of effective equation of state
in a universe contains, besides the ordinary matter and dark energy, a
self-interacting (collisional matter), in the generalized $f(R,T)$ theory of
gravity, where $R$ and $... | [
{
"created": "Fri, 17 Apr 2015 20:24:32 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Nov 2015 09:39:41 GMT",
"version": "v2"
}
] | 2015-11-04 | [
[
"Baffou",
"E. H.",
""
],
[
"Houndjo",
"M. J. S.",
""
],
[
"Rodrigues",
"M. E.",
""
],
[
"Kpadonou",
"A. V.",
""
],
[
"Tossa",
"J.",
""
]
] | We study the evolution of the cosmological parameters, namely, the deceleration parameter $q(z)$ and the parameter of effective equation of state in a universe contains, besides the ordinary matter and dark energy, a self-interacting (collisional matter), in the generalized $f(R,T)$ theory of gravity, where $R$ and $T$... |
1810.11595 | Matthew Fox | Matthew S. Fox | Palatini $f(\mathcal{R}, \mathcal{L}_m, \mathcal{R}_{\mu\nu}T^{\mu\nu})$
gravity and its Born-Infeld semblance | 13 pages, minor revisions, references added | Phys. Rev. D 99, 124027 (2019) | 10.1103/PhysRevD.99.124027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate Palatini $f(\mathcal{R},\mathcal{L}_m,
\mathcal{R}_{\mu\nu}T^{\mu\nu})$ modified theories of gravity wherein the
metric and affine connection are treated as independent dynamical fields and
the gravitational Lagrangian is made a function of the Ricci scalar
$\mathcal{R}$, the matter Lagrangian density ... | [
{
"created": "Sat, 27 Oct 2018 04:40:48 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Nov 2018 00:26:17 GMT",
"version": "v2"
}
] | 2019-06-26 | [
[
"Fox",
"Matthew S.",
""
]
] | We investigate Palatini $f(\mathcal{R},\mathcal{L}_m, \mathcal{R}_{\mu\nu}T^{\mu\nu})$ modified theories of gravity wherein the metric and affine connection are treated as independent dynamical fields and the gravitational Lagrangian is made a function of the Ricci scalar $\mathcal{R}$, the matter Lagrangian density $\... |
gr-qc/9302016 | null | Alexander Vilenkin | Quantum Cosmology | 10 pages, TUTP-92-13 | null | 10.1111/j.1749-6632.1993.tb43903.x | null | gr-qc | null | An elementary review of quantum cosmology. (Talk given at Texas/Pascos 1992
at Berkeley)
| [
{
"created": "Thu, 11 Feb 1993 17:17:00 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Vilenkin",
"Alexander",
""
]
] | An elementary review of quantum cosmology. (Talk given at Texas/Pascos 1992 at Berkeley) |
1108.2133 | Bijan Saha Dr. | Bijan Saha, Hassan Amirhashchi, Anirudh Pradhan | Two-Fluid Scenario for Dark Energy Models in an FRW Universe-Revisited | 10 pages, 4 figures. arXiv admin note: substantial overlap with
arXiv:1011.3940 | Astrophys. Space Sci., 342 (2012) 257 - 267 | 10.1007/s10509-012-1155-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the evolution of the dark energy parameter within the
scope of a spatially homogeneous and isotropic Friedmann-Robertson-Walker (FRW)
model filled with barotropic fluid and dark energy by revisiting the recent
results (Amirhashchi et al. in Chin. Phys. Lett. 28:039801, 2011a). To prevail
the de... | [
{
"created": "Wed, 10 Aug 2011 09:43:49 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Sep 2011 08:42:17 GMT",
"version": "v2"
},
{
"created": "Mon, 2 Jul 2012 16:16:22 GMT",
"version": "v3"
}
] | 2015-05-01 | [
[
"Saha",
"Bijan",
""
],
[
"Amirhashchi",
"Hassan",
""
],
[
"Pradhan",
"Anirudh",
""
]
] | In this paper we study the evolution of the dark energy parameter within the scope of a spatially homogeneous and isotropic Friedmann-Robertson-Walker (FRW) model filled with barotropic fluid and dark energy by revisiting the recent results (Amirhashchi et al. in Chin. Phys. Lett. 28:039801, 2011a). To prevail the dete... |
2306.03305 | Jose Edgar Madriz Aguilar Dr. | Jos\'e Edgar Madriz Aguilar, A. Bernal, F. Aceves de la Cruz, J. A.
Licea | Gravitational waves during Higgs inflation from complex geometrical
scalar-tensor theory of gravity | 9 pages, 2 figures | null | 10.1016/j.dark.2023.101372 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper we investigate tensor fluctuations of the metric at the end of
a Higgs inflationary period in the context of a recently introduced complex
geometrical scalar-tensor theory of gravity. In our model the Higgs field has a
geometrical origin and the affine connection is determined by the Palatini's
principl... | [
{
"created": "Mon, 5 Jun 2023 23:13:57 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Jun 2023 21:28:26 GMT",
"version": "v2"
}
] | 2024-04-16 | [
[
"Aguilar",
"José Edgar Madriz",
""
],
[
"Bernal",
"A.",
""
],
[
"de la Cruz",
"F. Aceves",
""
],
[
"Licea",
"J. A.",
""
]
] | In this paper we investigate tensor fluctuations of the metric at the end of a Higgs inflationary period in the context of a recently introduced complex geometrical scalar-tensor theory of gravity. In our model the Higgs field has a geometrical origin and the affine connection is determined by the Palatini's principle.... |
2212.13031 | Kazufumi Takahashi | Antonio De Felice, Shinji Mukohyama, Kazufumi Takahashi | Approximately stealth black hole in higher-order scalar-tensor theories | 10 pages | JCAP 03 (2023) 050 | 10.1088/1475-7516/2023/03/050 | YITP-22-161, IPMU22-0071 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate a generic quadratic higher-order scalar-tensor theory with a
scordatura term, which is expected to provide a consistent perturbative
description of stealth solutions with a timelike scalar field profile. In the
DHOST subclass, exactly stealth solutions are known to yield perturbations
infinitely strong... | [
{
"created": "Mon, 26 Dec 2022 08:04:20 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Mar 2023 21:48:13 GMT",
"version": "v2"
}
] | 2023-03-27 | [
[
"De Felice",
"Antonio",
""
],
[
"Mukohyama",
"Shinji",
""
],
[
"Takahashi",
"Kazufumi",
""
]
] | We investigate a generic quadratic higher-order scalar-tensor theory with a scordatura term, which is expected to provide a consistent perturbative description of stealth solutions with a timelike scalar field profile. In the DHOST subclass, exactly stealth solutions are known to yield perturbations infinitely strongly... |
gr-qc/9706014 | Tomohiro Harada | Tomohiro Harada | Stability Analysis of Spherically Symmetric Star in Scalar-Tensor
Theories of Gravity | 17 pages, including 6 eps figures. Accepted for publication in
Progress of Theoretical Physics. Grammatical errors corrected | Prog.Theor.Phys.98:359-379,1997 | 10.1143/PTP.98.359 | KUNS-1439 | gr-qc astro-ph | null | A stability analysis of a spherically symmetric star in scalar-tensor
theories of gravity is given in terms of the frequencies of quasi-normal modes.
The scalar-tensor theories have a scalar field which is related to gravitation.
There is an arbitrary function, the so-called coupling function, which
determines the st... | [
{
"created": "Thu, 5 Jun 1997 08:50:34 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Jun 1997 02:34:48 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Jul 1997 10:53:31 GMT",
"version": "v3"
}
] | 2010-11-19 | [
[
"Harada",
"Tomohiro",
""
]
] | A stability analysis of a spherically symmetric star in scalar-tensor theories of gravity is given in terms of the frequencies of quasi-normal modes. The scalar-tensor theories have a scalar field which is related to gravitation. There is an arbitrary function, the so-called coupling function, which determines the stre... |
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