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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2206.09267 | S. N Sajadi | S.H. Hendi, N. Riazi, S.N. Sajadi | Quantum Cosmology in Thick Brane | 10 pages, 5 figures. arXiv admin note: text overlap with
arXiv:2011.11093 | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | One of the interesting open problems in the cosmological framework is
applying quantum physics to the whole universe, consistently. Although
different conceptual aspects of quantum cosmology are still very much alive,
till now, all the attempts of obtaining a unique and well-defined version of
quantum cosmology have ... | [
{
"created": "Sat, 18 Jun 2022 18:49:27 GMT",
"version": "v1"
}
] | 2022-06-22 | [
[
"Hendi",
"S. H.",
""
],
[
"Riazi",
"N.",
""
],
[
"Sajadi",
"S. N.",
""
]
] | One of the interesting open problems in the cosmological framework is applying quantum physics to the whole universe, consistently. Although different conceptual aspects of quantum cosmology are still very much alive, till now, all the attempts of obtaining a unique and well-defined version of quantum cosmology have be... |
gr-qc/0111008 | Kayll Lake | Mustapha Ishak and Kayll Lake | An Online Interactive Geometric Database: Including Exact Solutions of
Einstein's Field Equations | 11 pages revtex4 4 figures. Final form to appear in Class. Quantum
Grav. Further information at http://grdb.org | Class.Quant.Grav. 19 (2002) 505-514 | 10.1088/0264-9381/19/3/306 | null | gr-qc | null | We describe a new interactive database (GRDB) of geometric objects in the
general area of differential geometry. Database objects include, but are not
restricted to, exact solutions of Einstein's field equations. GRDB is designed
for researchers (and teachers) in applied mathematics, physics and related
fields. The f... | [
{
"created": "Fri, 2 Nov 2001 22:23:23 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Dec 2001 22:07:57 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Ishak",
"Mustapha",
""
],
[
"Lake",
"Kayll",
""
]
] | We describe a new interactive database (GRDB) of geometric objects in the general area of differential geometry. Database objects include, but are not restricted to, exact solutions of Einstein's field equations. GRDB is designed for researchers (and teachers) in applied mathematics, physics and related fields. The fle... |
1905.02389 | Fabrizio Tamburini | I. Licata, G. Iovane, L. Chiatti, E. Benedetto, F. Tamburini | Dark Universe and distribution of Matter as Quantum Imprinting: the
Quantum Origin of Universe | 18 pages | Physics of the Dark Universe 22 (2018) 181-188 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we analyze the Dark Matter problem and the distribution of
matter through two different approaches, which are linked by the possibility
that the solution of these astronomical puzzles should be sought in the quantum
imprinting of the Universe. The first approach is based on a cosmological model
formulat... | [
{
"created": "Tue, 7 May 2019 07:22:14 GMT",
"version": "v1"
}
] | 2019-05-08 | [
[
"Licata",
"I.",
""
],
[
"Iovane",
"G.",
""
],
[
"Chiatti",
"L.",
""
],
[
"Benedetto",
"E.",
""
],
[
"Tamburini",
"F.",
""
]
] | In this paper we analyze the Dark Matter problem and the distribution of matter through two different approaches, which are linked by the possibility that the solution of these astronomical puzzles should be sought in the quantum imprinting of the Universe. The first approach is based on a cosmological model formulated... |
2003.04723 | Emil Nissimov | David Benisty, Eduardo Guendelman, Emil Nissimov, Svetlana Pacheva | Quintessential Inflation with Dynamical Higgs Generation as an Affine
Gravity | 17 pages, 1 figure; v.2 few clarifications and several new citations
added, accepted for publication in "Symmetry", Special issue "Global and
Local Scale Symmetry in Gravitation and Cosmology"; partial overlap with
arXiv:2002.04110 | Symmetry 2020, 12, 734 (Special issue on "Global and Local Scale
Symmetry in Gravitationa and Cosmology") | 10.3390/sym12050734 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | First, we propose a scale-invariant modified gravity interacting with a
neutral scalar "inflaton" and a Higgs-like SU(2)xU(1) iso-doublet scalar field
based on the formalism of non-Riemannian (metric-independent) spacetime
volume-elements. This model describes in the physical Einstein frame a
quintessential inflation... | [
{
"created": "Sat, 7 Mar 2020 20:38:58 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Apr 2020 10:19:05 GMT",
"version": "v2"
}
] | 2020-05-14 | [
[
"Benisty",
"David",
""
],
[
"Guendelman",
"Eduardo",
""
],
[
"Nissimov",
"Emil",
""
],
[
"Pacheva",
"Svetlana",
""
]
] | First, we propose a scale-invariant modified gravity interacting with a neutral scalar "inflaton" and a Higgs-like SU(2)xU(1) iso-doublet scalar field based on the formalism of non-Riemannian (metric-independent) spacetime volume-elements. This model describes in the physical Einstein frame a quintessential inflationar... |
1610.07346 | Prado Martin-Moruno | Mariam Bouhmadi-L\'opez, Salvatore Capozziello, Prado Mart\'in-Moruno | Self-acceleration and matter content in bicosmology from Noether
Symmetries | V1: 23 pages. V2: 7 references added. V3: clarifications in the
discussion; no physics changes; 5 references added; 16 pages. V4: minor
changes; 1 reference added. This version accepted for publication in General
Relativity and Gravitation | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In bigravity, when taking into account the potential existence of matter
fields minimally coupled to the second gravitation sector, the dynamics of our
Universe depends on some matter that cannot be observed in a direct way. In
this paper, we assume the existence of a Noether symmetry in bigravity
cosmologies in orde... | [
{
"created": "Mon, 24 Oct 2016 10:08:53 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Oct 2016 09:56:17 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Apr 2017 10:12:42 GMT",
"version": "v3"
},
{
"created": "Thu, 1 Mar 2018 13:23:13 GMT",
"version": "v4"
}
] | 2018-03-02 | [
[
"Bouhmadi-López",
"Mariam",
""
],
[
"Capozziello",
"Salvatore",
""
],
[
"Martín-Moruno",
"Prado",
""
]
] | In bigravity, when taking into account the potential existence of matter fields minimally coupled to the second gravitation sector, the dynamics of our Universe depends on some matter that cannot be observed in a direct way. In this paper, we assume the existence of a Noether symmetry in bigravity cosmologies in order ... |
1503.06085 | Lee Smolin | Marina Cortes, Henrique Gomes and Lee Smolin | Time asymmetric extensions of general relativity | 19 pages, LaTex, no figures | Phys. Rev. D 92, 043502 (2015) | 10.1103/PhysRevD.92.043502 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a class of modified gravity theories that deform general
relativity in a way that breaks time reversal invariance and, very mildly,
locality. The algebra of constraints, local physical degrees of freedom, and
their linearized equations of motion, are unchanged, yet observable effects may
be present on cos... | [
{
"created": "Fri, 20 Mar 2015 14:28:37 GMT",
"version": "v1"
}
] | 2015-08-12 | [
[
"Cortes",
"Marina",
""
],
[
"Gomes",
"Henrique",
""
],
[
"Smolin",
"Lee",
""
]
] | We describe a class of modified gravity theories that deform general relativity in a way that breaks time reversal invariance and, very mildly, locality. The algebra of constraints, local physical degrees of freedom, and their linearized equations of motion, are unchanged, yet observable effects may be present on cosmo... |
1107.4322 | Michele Levi | Michele Levi | Binary dynamics from spin1-spin2 coupling at fourth post-Newtonian order | 24 pages, revtex4-1, 5 figures; v2: typos fixed, added references;
v3: revised, published; v4: few omissions and typos corrected, minor edit | Phys.Rev.D85:064043,2012 | 10.1103/PhysRevD.85.064043 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate via the effective field theory (EFT) approach the
next-to-next-to-leading order (NNLO) spin1-spin2 conservative potential for a
binary. Hereby, we first demonstrate the ability of the EFT approach to go at
NNLO in post-Newtonian (PN) corrections from spin effects. The NNLO spin1-spin2
interaction is eval... | [
{
"created": "Thu, 21 Jul 2011 17:37:32 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Nov 2011 23:43:56 GMT",
"version": "v2"
},
{
"created": "Fri, 6 Apr 2012 12:26:49 GMT",
"version": "v3"
},
{
"created": "Wed, 25 Jun 2014 17:14:21 GMT",
"version": "v4"
}
] | 2014-06-26 | [
[
"Levi",
"Michele",
""
]
] | We calculate via the effective field theory (EFT) approach the next-to-next-to-leading order (NNLO) spin1-spin2 conservative potential for a binary. Hereby, we first demonstrate the ability of the EFT approach to go at NNLO in post-Newtonian (PN) corrections from spin effects. The NNLO spin1-spin2 interaction is evalua... |
gr-qc/9909046 | Dr. Bijan Modak | B.Modak, S. Kamilya and S.Biswas | Evolution of Dynamical Coupling in Scalar Tensor Theory from Noether
Symmetry | 7 Pages, ReVTeX, no figure | Gen.Rel.Grav. 32 (2000) 1615-1626 | 10.1023/A:1001990303511 | null | gr-qc | null | We present the gravitational coupling function $\omega(\phi)$ in the vacuum
scalar-tensor theory as allowed by the Noether symmetry. We also obtain some
exact cosmological solutions in the spatially homogeneous and isotropic
background thereby showing that the attractor mechanism is not effective enough
to reduce the... | [
{
"created": "Wed, 15 Sep 1999 11:30:38 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Modak",
"B.",
""
],
[
"Kamilya",
"S.",
""
],
[
"Biswas",
"S.",
""
]
] | We present the gravitational coupling function $\omega(\phi)$ in the vacuum scalar-tensor theory as allowed by the Noether symmetry. We also obtain some exact cosmological solutions in the spatially homogeneous and isotropic background thereby showing that the attractor mechanism is not effective enough to reduce the t... |
gr-qc/0610133 | Nikodem Poplawski | Nikodem J. Poplawski | The cosmic snap parameter in f(R) gravity | 9 pages; published version | Class.Quant.Grav.24:3013-3020,2007 | 10.1088/0264-9381/24/11/014 | null | gr-qc astro-ph | null | We derive the expression for the snap parameter in f(R) gravity. We use the
Palatini variational principle to obtain the field equations and regard the
Einstein conformal frame as physical. We predict the present-day value of the
snap parameter for the particular case f(R)=R-const/R, which is the simplest
f(R) model ... | [
{
"created": "Fri, 27 Oct 2006 19:58:33 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Oct 2006 20:36:16 GMT",
"version": "v2"
},
{
"created": "Tue, 22 May 2007 23:34:15 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Poplawski",
"Nikodem J.",
""
]
] | We derive the expression for the snap parameter in f(R) gravity. We use the Palatini variational principle to obtain the field equations and regard the Einstein conformal frame as physical. We predict the present-day value of the snap parameter for the particular case f(R)=R-const/R, which is the simplest f(R) model ex... |
1812.11036 | Z. Yousaf | M. Shahzadi, Z. Yousaf, Saeed Ullah Khan | Circular Motion and Energy Extraction in a Rotating Black Hole | 24 pages, 9 figures | Phys. Dark Universe 24, 100263 (2019) | 10.1016/j.dark.2019.100263 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper explores the circular geodesics of neutral test particles on an
equatorial plane around a rotating black hole. After using equations of motion
of scalar-tensor-vector gravity with the circular geodesics of null-like
particles, we find the equation of photon orbit. With the help of an effective
potential fo... | [
{
"created": "Tue, 18 Dec 2018 03:01:56 GMT",
"version": "v1"
}
] | 2021-01-08 | [
[
"Shahzadi",
"M.",
""
],
[
"Yousaf",
"Z.",
""
],
[
"Khan",
"Saeed Ullah",
""
]
] | This paper explores the circular geodesics of neutral test particles on an equatorial plane around a rotating black hole. After using equations of motion of scalar-tensor-vector gravity with the circular geodesics of null-like particles, we find the equation of photon orbit. With the help of an effective potential form... |
1303.4129 | Roseanne Cheng | Roseanne M. Cheng and Charles R. Evans | Relativistic effects in the tidal interaction between a white dwarf and
a massive black hole in Fermi normal coordinates | Updated to match published version, one reference added, one figure
changed | Phys. Rev. D 87, 104010 (2013) | 10.1103/PhysRevD.87.104010 | null | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider tidal encounters between a white dwarf and an intermediate mass
black hole. Both weak encounters and those at the threshold of disruption are
modeled. The numerical code combines mesh-based hydrodynamics, a spectral
method solution of the self-gravity, and a general relativistic Fermi normal
coordinate sy... | [
{
"created": "Mon, 18 Mar 2013 01:28:01 GMT",
"version": "v1"
},
{
"created": "Wed, 8 May 2013 20:55:51 GMT",
"version": "v2"
}
] | 2013-05-10 | [
[
"Cheng",
"Roseanne M.",
""
],
[
"Evans",
"Charles R.",
""
]
] | We consider tidal encounters between a white dwarf and an intermediate mass black hole. Both weak encounters and those at the threshold of disruption are modeled. The numerical code combines mesh-based hydrodynamics, a spectral method solution of the self-gravity, and a general relativistic Fermi normal coordinate syst... |
1106.4357 | Ramin G. Daghigh | James Babb, Ramin G. Daghigh and Gabor Kunstatter | Highly Damped Quasinormal Modes and the Small Scale Structure of Quantum
Corrected Black Hole Exteriors | 32 pages, 7 figures | null | 10.1103/PhysRevD.84.084031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasinormal modes provide valuable information about the structure of
spacetime outside a black hole. There is also a conjectured relationship
between the highly damped quasinormal modes and the semi-classical spectrum of
the horizon area/entropy. In this paper, we show that for spacetimes
characterized by more than ... | [
{
"created": "Wed, 22 Jun 2011 00:48:18 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Babb",
"James",
""
],
[
"Daghigh",
"Ramin G.",
""
],
[
"Kunstatter",
"Gabor",
""
]
] | Quasinormal modes provide valuable information about the structure of spacetime outside a black hole. There is also a conjectured relationship between the highly damped quasinormal modes and the semi-classical spectrum of the horizon area/entropy. In this paper, we show that for spacetimes characterized by more than on... |
1911.04354 | Justin Feng | Justin C. Feng, Edgar Gasper\'in, Jarrod L. Williams | Almost-Killing equation: Stability, hyperbolicity, and black hole Gauss
law | 10 pages, 3 figures. Matches published version | Phys. Rev. D 100, 124034 (2019) | 10.1103/PhysRevD.100.124034 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the Hamiltonian formulation and hyperbolicity of the
almost-Killing equation (AKE). We find that for all but one parameter choice,
the Hamiltonian is unbounded, and in some cases, the AKE has ghost degrees of
freedom. We also show the AKE is only strongly hyperbolic for one parameter
choice, which correspo... | [
{
"created": "Mon, 11 Nov 2019 15:56:53 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Dec 2019 16:47:59 GMT",
"version": "v2"
}
] | 2019-12-16 | [
[
"Feng",
"Justin C.",
""
],
[
"Gasperín",
"Edgar",
""
],
[
"Williams",
"Jarrod L.",
""
]
] | We examine the Hamiltonian formulation and hyperbolicity of the almost-Killing equation (AKE). We find that for all but one parameter choice, the Hamiltonian is unbounded, and in some cases, the AKE has ghost degrees of freedom. We also show the AKE is only strongly hyperbolic for one parameter choice, which correspond... |
gr-qc/9906013 | John Klauder | John R. Klauder | Noncanonical Quantization of Gravity. I. Foundations of Affine Quantum
Gravity | minor changes, LaTeX, 37 pages, no figures | J.Math.Phys.40:5860-5882,1999 | 10.1063/1.533059 | null | gr-qc hep-th math-ph math.MP quant-ph | null | The nature of the classical canonical phase-space variables for gravity
suggests that the associated quantum field operators should obey affine
commutation relations rather than canonical commutation relations. Prior to the
introduction of constraints, a primary kinematical representation is derived in
the form of a ... | [
{
"created": "Thu, 3 Jun 1999 20:49:24 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Jun 1999 21:01:12 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Klauder",
"John R.",
""
]
] | The nature of the classical canonical phase-space variables for gravity suggests that the associated quantum field operators should obey affine commutation relations rather than canonical commutation relations. Prior to the introduction of constraints, a primary kinematical representation is derived in the form of a re... |
0805.3941 | Hyung Won Lee | Kyoung Yee Kim, Hyung Won Lee and Yun Soo Myung | Density perturbations in decaying holographic dark energy models | 11pages, 5 figures | null | 10.1142/S0217732309030643 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study cosmological perturbations in the context of an interacting dark
energy model, where the holographic dark energy with IR cutoff decays into the
cold dark matter (CDM). For this purpose, we introduce three IR cutoffs of
Hubble horizon, particle horizon, and future event horizon. Here we present
small perturba... | [
{
"created": "Mon, 26 May 2008 12:01:15 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Aug 2008 08:39:57 GMT",
"version": "v2"
}
] | 2015-05-13 | [
[
"Kim",
"Kyoung Yee",
""
],
[
"Lee",
"Hyung Won",
""
],
[
"Myung",
"Yun Soo",
""
]
] | We study cosmological perturbations in the context of an interacting dark energy model, where the holographic dark energy with IR cutoff decays into the cold dark matter (CDM). For this purpose, we introduce three IR cutoffs of Hubble horizon, particle horizon, and future event horizon. Here we present small perturbati... |
0912.3692 | Leonardo Gualtieri | V. Ferrari, L. Gualtieri, F. Pannarale | Neutron star tidal disruption in mixed binaries: the imprint of the
equation of state | 11 pages, 9 figures, 3 tables; references added | Phys.Rev.D81:064026,2010 | 10.1103/PhysRevD.81.064026 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the tidal disruption of neutron stars in black hole-neutron star
coalescing binaries. We calculate the critical orbital separation at which the
star is disrupted by the black hole tidal field for several equations of state
describing the matter inside the neutron star, and for a large set of the
binary param... | [
{
"created": "Fri, 18 Dec 2009 14:51:53 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Mar 2010 17:03:21 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Mar 2010 15:49:25 GMT",
"version": "v3"
}
] | 2010-04-14 | [
[
"Ferrari",
"V.",
""
],
[
"Gualtieri",
"L.",
""
],
[
"Pannarale",
"F.",
""
]
] | We study the tidal disruption of neutron stars in black hole-neutron star coalescing binaries. We calculate the critical orbital separation at which the star is disrupted by the black hole tidal field for several equations of state describing the matter inside the neutron star, and for a large set of the binary paramet... |
2201.08785 | Luana Michela Modafferi | Luana M. Modafferi, Joan Moragues, David Keitel, LIGO Scientific
Collaboration, Virgo Collaboration, KAGRA Collaboration | Search setup for long-duration transient gravitational waves from
glitching pulsars during LIGO-Virgo third observing run | 5 pages, submitted to Proceedings of TAUP 2021 | J. Phys.: Conf. Ser. 2156 (2022) 012079 | 10.1088/1742-6596/2156/1/012079 | LIGO-P2100376 | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Pulsars are spinning neutron stars which emit an electromagnetic beam. We
expect pulsars to slowly decrease their rotational frequency. However, sudden
increases of the rotational frequency have been observed from different
pulsars. These events are called "glitches" and they are followed by a
relaxation phase with t... | [
{
"created": "Fri, 21 Jan 2022 17:04:07 GMT",
"version": "v1"
}
] | 2022-02-24 | [
[
"Modafferi",
"Luana M.",
""
],
[
"Moragues",
"Joan",
""
],
[
"Keitel",
"David",
""
],
[
"Collaboration",
"LIGO Scientific",
""
],
[
"Collaboration",
"Virgo",
""
],
[
"Collaboration",
"KAGRA",
""
]
] | Pulsars are spinning neutron stars which emit an electromagnetic beam. We expect pulsars to slowly decrease their rotational frequency. However, sudden increases of the rotational frequency have been observed from different pulsars. These events are called "glitches" and they are followed by a relaxation phase with tim... |
gr-qc/0201051 | Thomas W. Baumgarte | A. M. Knapp, E. J. Walker and T. W. Baumgarte | Illustrating Stability Properties of Numerical Relativity in
Electrodynamics | 5 pages, 2 figures, to be published as Brief Report in Physical
Review D | Phys.Rev. D65 (2002) 064031 | 10.1103/PhysRevD.65.064031 | null | gr-qc astro-ph | null | We show that a reformulation of the ADM equations in general relativity,
which has dramatically improved the stability properties of numerical
implementations, has a direct analogue in classical electrodynamics. We
numerically integrate both the original and the revised versions of Maxwell's
equations, and show that ... | [
{
"created": "Tue, 15 Jan 2002 19:53:24 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Knapp",
"A. M.",
""
],
[
"Walker",
"E. J.",
""
],
[
"Baumgarte",
"T. W.",
""
]
] | We show that a reformulation of the ADM equations in general relativity, which has dramatically improved the stability properties of numerical implementations, has a direct analogue in classical electrodynamics. We numerically integrate both the original and the revised versions of Maxwell's equations, and show that th... |
0906.0313 | Nicolas Yunes | Nicolas Yunes, K. G. Arun, Emanuele Berti, Clifford M. Will | Post-Circular Expansion of Eccentric Binary Inspirals: Fourier-Domain
Waveforms in the Stationary Phase Approximation | 24 pages, 9 figures, Replaced with version that matches published
version. Version 3 corrects a small typo in \xi_{5} in Eq. (C1) | Phys.Rev.D80:084001,2009 | 10.1103/PhysRevD.80.084001 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We lay the foundations for the construction of analytic expressions for
Fourier-domain gravitational waveforms produced by eccentric, inspiraling
compact binaries in a post-circular or small-eccentricity approximation. The
time-dependent, "plus" and "cross" polarizations are expanded in Bessel
functions, which are th... | [
{
"created": "Mon, 1 Jun 2009 16:56:25 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Oct 2009 19:29:36 GMT",
"version": "v2"
},
{
"created": "Wed, 14 May 2014 00:32:04 GMT",
"version": "v3"
}
] | 2014-05-15 | [
[
"Yunes",
"Nicolas",
""
],
[
"Arun",
"K. G.",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Will",
"Clifford M.",
""
]
] | We lay the foundations for the construction of analytic expressions for Fourier-domain gravitational waveforms produced by eccentric, inspiraling compact binaries in a post-circular or small-eccentricity approximation. The time-dependent, "plus" and "cross" polarizations are expanded in Bessel functions, which are then... |
gr-qc/0703012 | Masayuki Tanimoto | Masayuki Tanimoto and Yasusada Nambu | Luminosity distance-redshift relation for the LTB solution near the
center | 18 pages, 2 figures, including 2 new paragraphs and 1 figure in
section 2, final version to appear in Classical and Quantum Gravity | Class.Quant.Grav.24:3843-3857,2007 | 10.1088/0264-9381/24/15/006 | null | gr-qc astro-ph | null | Motivated by the inverse problem for the Lemaitre-Tolman-Bondi dust solution,
in which problem the luminosity distance function $D_L(z)$ is taken as an input
to select a specific model, we compute the function $D_L(z)$ of the LTB
solution up to the third order of $z$. To perform the otherwise cumbersome
computation, ... | [
{
"created": "Fri, 2 Mar 2007 11:04:16 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Jul 2007 18:39:38 GMT",
"version": "v2"
}
] | 2010-10-27 | [
[
"Tanimoto",
"Masayuki",
""
],
[
"Nambu",
"Yasusada",
""
]
] | Motivated by the inverse problem for the Lemaitre-Tolman-Bondi dust solution, in which problem the luminosity distance function $D_L(z)$ is taken as an input to select a specific model, we compute the function $D_L(z)$ of the LTB solution up to the third order of $z$. To perform the otherwise cumbersome computation, we... |
2106.01773 | Karim Mosani | Karim Mosani, Dipanjan Dey, Pankaj S. Joshi, Gauranga C. Samanta,
Harikrishnan Menon, Vaishnavi D. Patel | On the visibility of singularities in general relativity and modified
gravity theories | 11 pages, 4 figures, accepted in classical and quantum gravity | null | 10.1088/1361-6382/acd97a | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the global causal structure of the end state of a spherically
symmetric marginally bound Lemaitre-Tolman-Bondi (LTB) \cite{Lemaitre, Tolman,
Bondi} collapsing cloud (which is well studied in general relativity) in the
framework of modified gravity having the generalized Lagrangian $R+\alpha R^2$
in the... | [
{
"created": "Thu, 3 Jun 2021 11:54:34 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Nov 2022 08:38:26 GMT",
"version": "v2"
},
{
"created": "Mon, 29 May 2023 13:24:51 GMT",
"version": "v3"
}
] | 2023-07-12 | [
[
"Mosani",
"Karim",
""
],
[
"Dey",
"Dipanjan",
""
],
[
"Joshi",
"Pankaj S.",
""
],
[
"Samanta",
"Gauranga C.",
""
],
[
"Menon",
"Harikrishnan",
""
],
[
"Patel",
"Vaishnavi D.",
""
]
] | We investigate the global causal structure of the end state of a spherically symmetric marginally bound Lemaitre-Tolman-Bondi (LTB) \cite{Lemaitre, Tolman, Bondi} collapsing cloud (which is well studied in general relativity) in the framework of modified gravity having the generalized Lagrangian $R+\alpha R^2$ in the a... |
gr-qc/0003033 | Masayuki Tanimoto | Masayuki Tanimoto (YITP, Kyoto University) | Locally U(1)*U(1) Symmetric Cosmological Models: Topology and Dynamics | 32 pages, 1 figure, LaTeX2e, revised Introduction slightly. To appear
in CQG | Class.Quant.Grav. 18 (2001) 479-507 | 10.1088/0264-9381/18/3/309 | YITP-00-13 | gr-qc | null | We show examples which reveal influences of spatial topologies to dynamics,
using a class of spatially {\it closed} inhomogeneous cosmological models. The
models, called the {\it locally U(1)$\times$U(1) symmetric models} (or the {\it
generalized Gowdy models}), are characterized by the existence of two commuting
spa... | [
{
"created": "Wed, 8 Mar 2000 19:32:31 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jan 2001 14:05:14 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Tanimoto",
"Masayuki",
"",
"YITP, Kyoto University"
]
] | We show examples which reveal influences of spatial topologies to dynamics, using a class of spatially {\it closed} inhomogeneous cosmological models. The models, called the {\it locally U(1)$\times$U(1) symmetric models} (or the {\it generalized Gowdy models}), are characterized by the existence of two commuting spati... |
2004.10252 | Mauricio Bellini | Juan Ignacio Musmarra (IFIMAR - CONICET & UNMdP), Mauricio Bellini
(IFIMAR - CONICET & UNMdP) | Large scales space-time waves from inflation with time dependent
cosmological parameter | improved version | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the emission of large-scales wavelength space-time waves during the
inflationary expansion of the universe, produced by back-reaction effects. As
an example, we study an inflationary model with variable time scale, where the
scale factor of the universe grows as a power of time. The coarse-grained field
to d... | [
{
"created": "Tue, 21 Apr 2020 19:40:25 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Jun 2020 14:36:12 GMT",
"version": "v2"
}
] | 2020-06-12 | [
[
"Musmarra",
"Juan Ignacio",
"",
"IFIMAR - CONICET & UNMdP"
],
[
"Bellini",
"Mauricio",
"",
"IFIMAR - CONICET & UNMdP"
]
] | We study the emission of large-scales wavelength space-time waves during the inflationary expansion of the universe, produced by back-reaction effects. As an example, we study an inflationary model with variable time scale, where the scale factor of the universe grows as a power of time. The coarse-grained field to des... |
2001.11094 | Gustavo Arciniega | Gustavo Arciniega, Luisa Jaime and Gabriella Piccinelli | Inflationary predictions of Geometric Inflation | 15 pages, 3 figures. Accepted version for publication in Physics
Letters B. References added | null | 10.1016/j.physletb.2020.135731 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of gravitational models obtained from the Geometric
Inflation's proposal, where an infinite tower of curvature scalars are included
into the action, we compute the slow-roll parameters by the Hubble slow-roll
approach. We test the viability of such models as inflationary scenarios,
focusing on the te... | [
{
"created": "Wed, 29 Jan 2020 21:05:41 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Aug 2020 05:34:24 GMT",
"version": "v2"
}
] | 2020-09-02 | [
[
"Arciniega",
"Gustavo",
""
],
[
"Jaime",
"Luisa",
""
],
[
"Piccinelli",
"Gabriella",
""
]
] | In the framework of gravitational models obtained from the Geometric Inflation's proposal, where an infinite tower of curvature scalars are included into the action, we compute the slow-roll parameters by the Hubble slow-roll approach. We test the viability of such models as inflationary scenarios, focusing on the tens... |
gr-qc/0602013 | James B. Hartle | James B. Hartle (University of California, Santa Barbara) | Generalizing Quantum Mechanics for Quantum Spacetime | 31 pages, 4 figures, latex, contribution to the 23rd Solvay
Conference, The Quantum Structure of Space and Time, one reference added | The Quantum Structure of Space and Time: ed. by D. Gross, M.
Henneaux, and A. Sevrin (World Scientific, Singapore, 2007) | null | null | gr-qc hep-th quant-ph | null | Familiar textbook quantum mechanics assumes a fixed background spacetime to
define states on spacelike surfaces and their unitary evolution between them.
Quantum theory has changed as our conceptions of space and time have evolved.
But quantum mechanics needs to be generalized further for quantum gravity where
spacet... | [
{
"created": "Thu, 2 Feb 2006 21:37:43 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Feb 2006 22:52:22 GMT",
"version": "v2"
}
] | 2008-06-09 | [
[
"Hartle",
"James B.",
"",
"University of California, Santa Barbara"
]
] | Familiar textbook quantum mechanics assumes a fixed background spacetime to define states on spacelike surfaces and their unitary evolution between them. Quantum theory has changed as our conceptions of space and time have evolved. But quantum mechanics needs to be generalized further for quantum gravity where spacetim... |
2004.03626 | Alexandre Toubiana | Alexandre Toubiana, Sylvain Marsat, Enrico Barausse, Stanislav Babak,
John Baker | Tests of general relativity with stellar-mass black hole binaries
observed by LISA | Update references | Phys. Rev. D 101, 104038 (2020) | 10.1103/PhysRevD.101.104038 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the observation of stellar-mass black holes binaries with the
Laser Interferometer Space Antenna (LISA). Preliminary results based on Fisher
information matrix analyses have suggested that gravitational waves from those
sources could be very sensitive to possible deviations from the theory of
general rela... | [
{
"created": "Tue, 7 Apr 2020 18:05:32 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jun 2020 08:12:04 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Jan 2021 19:09:08 GMT",
"version": "v3"
}
] | 2021-01-07 | [
[
"Toubiana",
"Alexandre",
""
],
[
"Marsat",
"Sylvain",
""
],
[
"Barausse",
"Enrico",
""
],
[
"Babak",
"Stanislav",
""
],
[
"Baker",
"John",
""
]
] | We consider the observation of stellar-mass black holes binaries with the Laser Interferometer Space Antenna (LISA). Preliminary results based on Fisher information matrix analyses have suggested that gravitational waves from those sources could be very sensitive to possible deviations from the theory of general relati... |
gr-qc/9209004 | null | Edward Malec and Niall \'O Murchadha | A Quasilocal Test of the Finiteness of the Universe | 4pages, plaintex | null | null | null | gr-qc astro-ph | null | The Cosmological Principle states that the universe is both homogeneous and
isotropic. This, alone, is not enough to specify the global geometry of the
spacetime. If we were able to measure both the Hubble constant and the energy
density we could determine whether the universe is open or closed.
Unfortunately, while ... | [
{
"created": "Fri, 11 Sep 1992 10:41:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Malec",
"Edward",
""
],
[
"Murchadha",
"Niall Ó",
""
]
] | The Cosmological Principle states that the universe is both homogeneous and isotropic. This, alone, is not enough to specify the global geometry of the spacetime. If we were able to measure both the Hubble constant and the energy density we could determine whether the universe is open or closed. Unfortunately, while so... |
1104.4673 | Kaca Bradonjic | Ka\'ca Bradonji\'c | Quantum Gravity and the Correspondence Principle | Essay written for the Gravity Research Foundation 2011 Awards for
Essays on Gravitation | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Standard approaches to quantum gravity start with a pre-spacetime structure
and attempt, in accordance with Bohr's correspondence principle, to recover the
pseudo-Riemannian manifold in the low energy limit. These approaches assume
there is a smooth transition from quantum gravity to general relativity common
to succ... | [
{
"created": "Mon, 25 Apr 2011 03:26:58 GMT",
"version": "v1"
}
] | 2011-04-26 | [
[
"Bradonjić",
"Kaća",
""
]
] | Standard approaches to quantum gravity start with a pre-spacetime structure and attempt, in accordance with Bohr's correspondence principle, to recover the pseudo-Riemannian manifold in the low energy limit. These approaches assume there is a smooth transition from quantum gravity to general relativity common to succes... |
1311.1379 | Letizia Sammut | Letizia Sammut, Christopher Messenger, Andrew Melatos, Benjamin J.
Owen | Implementation of the frequency-modulated sideband search method for
gravitational waves from low mass X-ray binaries | 20 pages, 5 figures | Phys. Rev. D 89, 043001 (2014) | 10.1103/PhysRevD.89.043001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe the practical implementation of the sideband search, a search for
periodic gravitational waves from neutron stars in binary systems. The orbital
motion of the source in its binary system causes frequency-modulation in the
combination of matched filters known as the $\mathcal{F}$-statistic. The
sideband se... | [
{
"created": "Wed, 6 Nov 2013 13:14:17 GMT",
"version": "v1"
}
] | 2014-12-02 | [
[
"Sammut",
"Letizia",
""
],
[
"Messenger",
"Christopher",
""
],
[
"Melatos",
"Andrew",
""
],
[
"Owen",
"Benjamin J.",
""
]
] | We describe the practical implementation of the sideband search, a search for periodic gravitational waves from neutron stars in binary systems. The orbital motion of the source in its binary system causes frequency-modulation in the combination of matched filters known as the $\mathcal{F}$-statistic. The sideband sear... |
gr-qc/0211058 | G. S. Khadekar | G.S.Khadekar, K.S.Adhav and G.R.Ghate (Department of Mathematics,
Nagpur University, Nagpur and Amravati University) | Mass formulae for spherically symmetric stellar configurations in five
dimensional space-time | 5 pages Latex, No figure | Astrophys.Space Sci. 289 (2004) 95-101 | 10.1023/B:ASTR.0000009395.67257.97 | null | gr-qc | null | An expression is derived where the mass is connected to an integral over the
pressure of gravitating matter in the frame work of five dimensional(5D)
space-time.
| [
{
"created": "Fri, 15 Nov 2002 11:32:14 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Khadekar",
"G. S.",
"",
"Department of Mathematics,\n Nagpur University, Nagpur and Amravati University"
],
[
"Adhav",
"K. S.",
"",
"Department of Mathematics,\n Nagpur University, Nagpur and Amravati University"
],
[
"Ghate",
"G. R.",
"",
"Department of ... | An expression is derived where the mass is connected to an integral over the pressure of gravitating matter in the frame work of five dimensional(5D) space-time. |
gr-qc/9904036 | Holger Lyre | Holger Lyre | Gauges, Holes, and their `Connections' | 13 pages, "Fifth International Conference on the History and
Foundations of General Relativity", July 8-11, 1999, University of Notre
Dame, Notre Dame, Indiana | null | null | null | gr-qc quant-ph | null | The purpose of this paper is to present a generalized hole argument for gauge
field theories and their geometrical setting in terms of fiber bundles. The
generalized hole argument is motivated and extended from the spacetime hole
arguments which appear in spacetime theories based on differentiable manifolds
such as g... | [
{
"created": "Thu, 15 Apr 1999 03:07:17 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lyre",
"Holger",
""
]
] | The purpose of this paper is to present a generalized hole argument for gauge field theories and their geometrical setting in terms of fiber bundles. The generalized hole argument is motivated and extended from the spacetime hole arguments which appear in spacetime theories based on differentiable manifolds such as gen... |
2008.13326 | Ronaldo Vieira Lobato | G. A. Carvalho, F. Rocha, H. O. Oliveira, R. V. Lobato | General approach to the Lagrangian ambiguity in $f(R, T)$ gravity | New section added with application to Cosmology. Matches the
published version | Eur. Phys. J. C (2021) 81:134 | 10.1140/epjc/s10052-021-08920-4 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | The $f(R,T)$ gravity is a theory whose gravitational action depends
arbitrarily on the Ricci scalar, $R$, and the trace of the stress-energy
tensor, $T$; its field equations also depend on matter Lagrangian,
$\mathcal{L}_{m}$. In the modified theories of gravity where field equations
depend on Lagrangian, there is no... | [
{
"created": "Mon, 31 Aug 2020 02:33:47 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Feb 2021 19:58:25 GMT",
"version": "v2"
}
] | 2021-02-11 | [
[
"Carvalho",
"G. A.",
""
],
[
"Rocha",
"F.",
""
],
[
"Oliveira",
"H. O.",
""
],
[
"Lobato",
"R. V.",
""
]
] | The $f(R,T)$ gravity is a theory whose gravitational action depends arbitrarily on the Ricci scalar, $R$, and the trace of the stress-energy tensor, $T$; its field equations also depend on matter Lagrangian, $\mathcal{L}_{m}$. In the modified theories of gravity where field equations depend on Lagrangian, there is no u... |
gr-qc/9208003 | Ghosh | Tarun Souradeep | Generation of seed perturbations from Quantum Cosmology | Plain Tex 24 Pages | Astrophys.J.402:375-381,1993 | 10.1086/172141 | IUCAA-06-92 | gr-qc astro-ph | null | The origin of seed perturbations in the Universe is studied within the
framework of a specific minisuperspace model. It is shown that the `creation'
of the Universe as a result of a quantum transition from a flat empty spacetime
would lead to a flat FLRW (Friedmann Lema\^\i tre Robertson-Walker) Universe
with weak in... | [
{
"created": "Tue, 11 Aug 1992 22:30:09 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Souradeep",
"Tarun",
""
]
] | The origin of seed perturbations in the Universe is studied within the framework of a specific minisuperspace model. It is shown that the `creation' of the Universe as a result of a quantum transition from a flat empty spacetime would lead to a flat FLRW (Friedmann Lema\^\i tre Robertson-Walker) Universe with weak inho... |
gr-qc/9904070 | Marc Mars | Marc Mars | A spacetime characterization of the Kerr metric | 23 pages, No figures, LaTeX, to appear in Classical and Quantum
Gravity | Class.Quant.Grav. 16 (1999) 2507-2523 | 10.1088/0264-9381/16/7/323 | null | gr-qc | null | We obtain a characterization of the Kerr metric among stationary,
asymptotically flat, vacuum spacetimes, which extends the characterization in
terms of the Simon tensor (defined only in the manifold of trajectories) to the
whole spacetime. More precisely, we define a three index tensor on any
spacetime with a Killin... | [
{
"created": "Tue, 27 Apr 1999 14:56:33 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Mars",
"Marc",
""
]
] | We obtain a characterization of the Kerr metric among stationary, asymptotically flat, vacuum spacetimes, which extends the characterization in terms of the Simon tensor (defined only in the manifold of trajectories) to the whole spacetime. More precisely, we define a three index tensor on any spacetime with a Killing ... |
1612.06278 | Katharina Radermacher | Katharina Radermacher | Strong Cosmic Censorship in orthogonal Bianchi class B perfect fluids
and vacuum models | 88 pages, v2: changes following suggestions by referee, v3: minor
typos, layout changes | null | null | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Strong Cosmic Censorship conjecture states that for generic initial data
to Einstein's field equations, the maximal globally hyperbolic development is
inextendible. We prove this conjecture in the class of orthogonal Bianchi class
B perfect fluids and vacuum spacetimes, by showing that unboundedness of
certain cu... | [
{
"created": "Mon, 19 Dec 2016 17:32:31 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Dec 2017 16:22:57 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Dec 2017 21:32:00 GMT",
"version": "v3"
}
] | 2017-12-13 | [
[
"Radermacher",
"Katharina",
""
]
] | The Strong Cosmic Censorship conjecture states that for generic initial data to Einstein's field equations, the maximal globally hyperbolic development is inextendible. We prove this conjecture in the class of orthogonal Bianchi class B perfect fluids and vacuum spacetimes, by showing that unboundedness of certain curv... |
1209.1373 | David Garfinkle | David Garfinkle | Matters of Gravity, The Newsletter of the Topical Group on Gravitation
of the American Physical Society, Volume 40, Fall 2012 | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | GGR News:
we hear that..., by David Garfinkle
100 years ago, by David Garfinkle
New publisher and new book, by Vesselin Petkov
Research Briefs:
Dark matter news, by Katie Freese
LARES satellite, by Richard Matzner
Conference reports:
Workshop on gravitational wave bursts, by Pablo Laguna
JoshFest, b... | [
{
"created": "Thu, 6 Sep 2012 19:07:51 GMT",
"version": "v1"
}
] | 2012-09-07 | [
[
"Garfinkle",
"David",
""
]
] | GGR News: we hear that..., by David Garfinkle 100 years ago, by David Garfinkle New publisher and new book, by Vesselin Petkov Research Briefs: Dark matter news, by Katie Freese LARES satellite, by Richard Matzner Conference reports: Workshop on gravitational wave bursts, by Pablo Laguna JoshFest, by Ed Glass Electroma... |
0903.3991 | Serguei Krasnikov | S. Krasnikov | Even the Minkowski space is holed | Some clarifications are added on the relation of the counter-example
to Geroch's proposal | Phys.Rev.D79:124041,2009 | 10.1103/PhysRevD.79.124041 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To cure the lack of predictive power of general relativity Geroch proposed to
complete the theory with an additional postulate that only "hole-free"
spacetimes are permitted. I argue that this postulate is too strong -- it
prohibits even the Minkowski space.
| [
{
"created": "Tue, 24 Mar 2009 00:23:57 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Jun 2009 16:32:44 GMT",
"version": "v2"
}
] | 2009-09-27 | [
[
"Krasnikov",
"S.",
""
]
] | To cure the lack of predictive power of general relativity Geroch proposed to complete the theory with an additional postulate that only "hole-free" spacetimes are permitted. I argue that this postulate is too strong -- it prohibits even the Minkowski space. |
gr-qc/0106055 | Irina Filimonova | A.A.Logunov and M.A.Mestvirishvili | The Causality Principle in the Field Theory of Gravitation | 12 pages, latex file | Theor.Math.Phys. 129 (2001) 1439-1445; Teor.Mat.Fiz. 129 (2001)
153-160 | null | IHEP 2001-16 | gr-qc | null | The causality principle for the Relativistic Theory of Gravitation (RTG) is
presented. It is a straightforward consequence of the RTG basic postulates. The
necessary conditions for physical solutions of the gravitational field
equations to be fulfilled are given.
| [
{
"created": "Sat, 16 Jun 2001 11:57:58 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Logunov",
"A. A.",
""
],
[
"Mestvirishvili",
"M. A.",
""
]
] | The causality principle for the Relativistic Theory of Gravitation (RTG) is presented. It is a straightforward consequence of the RTG basic postulates. The necessary conditions for physical solutions of the gravitational field equations to be fulfilled are given. |
2204.13122 | Shahar Hod | Shahar Hod | Nontrivial spatial behavior of the Gauss-Bonnet curvature invariant of
rapidly-rotating Kerr black holes | 18 pages | Physical Review D 105, 084013 (2022) | 10.1103/PhysRevD.105.084013 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | The Gauss-Bonnet curvature invariant has attracted the attention of
physicists and mathematicians over the years. In particular, it has recently
been proved that black holes can support external matter configurations that
are non-minimally coupled to the Gauss-Bonnet invariant of the curved
spacetime. Motivated by th... | [
{
"created": "Wed, 27 Apr 2022 18:00:01 GMT",
"version": "v1"
}
] | 2022-05-04 | [
[
"Hod",
"Shahar",
""
]
] | The Gauss-Bonnet curvature invariant has attracted the attention of physicists and mathematicians over the years. In particular, it has recently been proved that black holes can support external matter configurations that are non-minimally coupled to the Gauss-Bonnet invariant of the curved spacetime. Motivated by this... |
gr-qc/0310066 | Pieter Blue | P. Blue, A. Soffer | The wave equation on the Schwarzschild metric II: Local decay for the
spin 2 Regge Wheeler equation | AMS-LaTeX, 8 pages with 1 figure. There is an errata to this paper at
gr-qc/0608073 | J.Math.Phys. 46 (2005) 012502 | 10.1063/1.1824211 | null | gr-qc math-ph math.AP math.MP | null | Odd-type spin 2 perturbations of Einstein's equation can be reduced to the
scalar Regge-Wheeler equation. We show that the weighted norms of solutions are
in L^2 of time and space. This result uses commutator methods and applies
uniformly to all relevant spherical harmonics.
| [
{
"created": "Tue, 14 Oct 2003 19:01:01 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Aug 2006 22:19:41 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Blue",
"P.",
""
],
[
"Soffer",
"A.",
""
]
] | Odd-type spin 2 perturbations of Einstein's equation can be reduced to the scalar Regge-Wheeler equation. We show that the weighted norms of solutions are in L^2 of time and space. This result uses commutator methods and applies uniformly to all relevant spherical harmonics. |
1405.5684 | Otakar Svitek | Petr Kaspar and Otakar Svitek | Averaging in cosmology based on Cartan scalars | 13 pages | Class. Quantum Grav. 31 (2014) 095012 | 10.1088/0264-9381/31/9/095012 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | We present a new approach for averaging in general relativity and cosmology.
After a short review of the theory originally taken from the equivalence
problem, we consider two ways how to deal with averaging based on Cartan
scalars. We apply the theory for two different LTB models. In the first one,
correlation term b... | [
{
"created": "Thu, 22 May 2014 09:37:34 GMT",
"version": "v1"
}
] | 2014-05-23 | [
[
"Kaspar",
"Petr",
""
],
[
"Svitek",
"Otakar",
""
]
] | We present a new approach for averaging in general relativity and cosmology. After a short review of the theory originally taken from the equivalence problem, we consider two ways how to deal with averaging based on Cartan scalars. We apply the theory for two different LTB models. In the first one, correlation term beh... |
0905.2541 | Luca Fabbri | Luca Fabbri | On the Principle of Equivalence | 8 pages | Contemporary Fundamental Physics, Dark Matter, page 49-56
(Dvoeglazov Editor, Nova Publishers, 2012) | null | UdeM-GPP-TH-09-180 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the Principle of Equivalence along with Weyl theorem to discuss
the interpretation of gravity as a geometric effect; we study what are the
restrictions on the connections that must be required for this geometrization
to occur in the most general case.
| [
{
"created": "Fri, 15 May 2009 12:53:19 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Jul 2009 08:32:56 GMT",
"version": "v2"
},
{
"created": "Tue, 3 May 2011 18:22:41 GMT",
"version": "v3"
},
{
"created": "Tue, 5 Jun 2012 12:14:52 GMT",
"version": "v4"
},
{
"crea... | 2012-07-27 | [
[
"Fabbri",
"Luca",
""
]
] | We consider the Principle of Equivalence along with Weyl theorem to discuss the interpretation of gravity as a geometric effect; we study what are the restrictions on the connections that must be required for this geometrization to occur in the most general case. |
1507.01753 | Ali \"Ovg\"un | I. Sakalli and A. \"Ovg\"un | Quantum Tunneling of Massive Spin-1 Particles From Non-stationary
Metrics | 8 pages, Accepted by Gen. Relativ. Gravit. (GRG) for publication | Gen. Relativ. Gravit. 48, 1 (2016) | 10.1007/s10714-015-1997-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We focus on the HR of massive vector (spin-1) particles tunneling from
Schwarzschild BH expressed in the Kruskal-Szekeres (KS) and dynamic Lemaitre
(DL) coordinates. Using the Proca equation (PE) together with the
Hamilton-Jacobi (HJ) and the WKB methods, we show that the tunneling rate, and
its consequence Hawking t... | [
{
"created": "Tue, 7 Jul 2015 11:16:07 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Nov 2015 11:46:43 GMT",
"version": "v2"
}
] | 2015-11-26 | [
[
"Sakalli",
"I.",
""
],
[
"Övgün",
"A.",
""
]
] | We focus on the HR of massive vector (spin-1) particles tunneling from Schwarzschild BH expressed in the Kruskal-Szekeres (KS) and dynamic Lemaitre (DL) coordinates. Using the Proca equation (PE) together with the Hamilton-Jacobi (HJ) and the WKB methods, we show that the tunneling rate, and its consequence Hawking tem... |
1601.05688 | Jorge Pullin | Miguel Campiglia, Rodolfo Gambini, Javier Olmedo, Jorge Pullin | Quantum self-gravitating collapsing matter in a quantum geometry | 4 pages, RevTex | null | 10.1088/0264-9381/33/18/18LT01 | LSU-REL-012116 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of how space-time responds to gravitating quantum matter in full
quantum gravity has been one of the main questions that any program of
quantization of gravity should address. Here we analyze this issue by
considering the quantization of a collapsing null shell coupled to spherically
symmetric loop quantu... | [
{
"created": "Thu, 21 Jan 2016 15:57:52 GMT",
"version": "v1"
}
] | 2016-09-07 | [
[
"Campiglia",
"Miguel",
""
],
[
"Gambini",
"Rodolfo",
""
],
[
"Olmedo",
"Javier",
""
],
[
"Pullin",
"Jorge",
""
]
] | The problem of how space-time responds to gravitating quantum matter in full quantum gravity has been one of the main questions that any program of quantization of gravity should address. Here we analyze this issue by considering the quantization of a collapsing null shell coupled to spherically symmetric loop quantum ... |
2101.01736 | M. Afif Ismail | Yi-Zen Chu, M. Afif Ismail, Yen-Wei Liu | Late time tails and nonlinear memories in asymptotically de Sitter
spacetimes | 37 pages, 4 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the propagation of a massless scalar wave in de Sitter spacetime
perturbed by an arbitrary central mass. By focusing on the late time limit,
this probes the portion of the scalar signal traveling inside the null cone.
Unlike in asymptotically flat spacetimes, the amplitude of the scalar field
detected by an ... | [
{
"created": "Tue, 5 Jan 2021 19:03:12 GMT",
"version": "v1"
},
{
"created": "Fri, 7 May 2021 20:00:12 GMT",
"version": "v2"
}
] | 2021-05-11 | [
[
"Chu",
"Yi-Zen",
""
],
[
"Ismail",
"M. Afif",
""
],
[
"Liu",
"Yen-Wei",
""
]
] | We study the propagation of a massless scalar wave in de Sitter spacetime perturbed by an arbitrary central mass. By focusing on the late time limit, this probes the portion of the scalar signal traveling inside the null cone. Unlike in asymptotically flat spacetimes, the amplitude of the scalar field detected by an ob... |
gr-qc/0612039 | Remo Garattini | Remo Garattini | Multigravity and Space Time Foam | 6 pages. Talk given at IRGAC-2006 (Barcelona, July 11-15, 2006),
accepted for publication in Journal of Physics A and extended version of the
talk given at MG11, Berlin, 23-29 July, 2006 | J.Phys.A40:7055-7060,2007 | 10.1088/1751-8113/40/25/S61 | null | gr-qc hep-th | null | We consider a multigravity approach to spacetime foam. As an application we
give indications on the computation of the cosmological constant, considered as
an eigenvalue of a Sturm-Liouville problem. A variational approach with
Gaussian trial wave functionals is used as a method to study such a problem. We
approximat... | [
{
"created": "Wed, 6 Dec 2006 18:24:03 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Garattini",
"Remo",
""
]
] | We consider a multigravity approach to spacetime foam. As an application we give indications on the computation of the cosmological constant, considered as an eigenvalue of a Sturm-Liouville problem. A variational approach with Gaussian trial wave functionals is used as a method to study such a problem. We approximate ... |
0907.4514 | Lorenzo Iorio | Lorenzo Iorio | The perihelion precession of Saturn, planet X/Nemesis and MOND | LaTex2e, 14 pages, no figures, no tables. Accepted by The Open
Astronomy Journal (TOAJ). Typos in eq. (17) and eq. (18) corrected | Open Astron.J.3: 1-6, 2010 | 10.2174/1874381101003010001 | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the retrograde perihelion precession of Saturn \Delta\dot\varpi,
recently estimated by different teams of astronomers by processing ranging data
from the Cassini spacecraft and amounting to some milliarcseconds per century,
can be explained in terms of a localized, distant body X, not yet directly
discov... | [
{
"created": "Mon, 27 Jul 2009 15:30:56 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Aug 2009 09:30:23 GMT",
"version": "v2"
},
{
"created": "Fri, 21 Aug 2009 14:54:56 GMT",
"version": "v3"
},
{
"created": "Tue, 1 Sep 2009 13:32:37 GMT",
"version": "v4"
},
{
"cre... | 2011-01-13 | [
[
"Iorio",
"Lorenzo",
""
]
] | We show that the retrograde perihelion precession of Saturn \Delta\dot\varpi, recently estimated by different teams of astronomers by processing ranging data from the Cassini spacecraft and amounting to some milliarcseconds per century, can be explained in terms of a localized, distant body X, not yet directly discover... |
1112.4395 | Mir Faizal | Mir Faizal | Multiverse in the Third Quantized Horava-Lifshits Theory of Gravity | 11 pages, 0 figures, accepted for publication in Mod. Phys. Lett. A | Mod. Phys. Lett. A27: 1250007, 2012 | 10.1142/S0217732312500071 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we analyze the third quantization of Horava-Lifshits theory of
gravity without detail balance. We show that the Wheeler-DeWitt equation for
Horava-Lifshits theory of gravity in minisuperspace approximation becomes the
equation for time-dependent harmonic oscillator. After interpreting the scaling
factor... | [
{
"created": "Mon, 19 Dec 2011 16:30:09 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Faizal",
"Mir",
""
]
] | In this paper we analyze the third quantization of Horava-Lifshits theory of gravity without detail balance. We show that the Wheeler-DeWitt equation for Horava-Lifshits theory of gravity in minisuperspace approximation becomes the equation for time-dependent harmonic oscillator. After interpreting the scaling factor a... |
1602.05020 | Clemens S\"amann | Jiri Podolsky, Clemens S\"amann, Roland Steinbauer, Robert Svarc | The global uniqueness and $C^1$-regularity of geodesics in expanding
impulsive gravitational waves | 24 pages, 2 figures | 2016 Class. Quantum Grav. 33 195010 | 10.1088/0264-9381/33/19/195010 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study geodesics in the complete family of expanding impulsive
gravitational waves propagating in spaces of constant curvature, that is
Minkowski, de Sitter and anti-de Sitter universes. Employing the continuous
form of the metric we rigorously prove existence and global uniqueness of
continuously differentiable ge... | [
{
"created": "Tue, 16 Feb 2016 13:57:13 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Oct 2016 16:23:03 GMT",
"version": "v2"
}
] | 2016-10-18 | [
[
"Podolsky",
"Jiri",
""
],
[
"Sämann",
"Clemens",
""
],
[
"Steinbauer",
"Roland",
""
],
[
"Svarc",
"Robert",
""
]
] | We study geodesics in the complete family of expanding impulsive gravitational waves propagating in spaces of constant curvature, that is Minkowski, de Sitter and anti-de Sitter universes. Employing the continuous form of the metric we rigorously prove existence and global uniqueness of continuously differentiable geod... |
0802.0652 | Plyatsko Roman | Roman Plyatsko, Oleksandr Stefanyshyn | Mathisson Equations: Non-Oscillatory Solutions in a Schwarzschild Field | 11 pages, 3 figures | ActaPhys.Polon.B39:23,2008 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Mathisson equations under the Frenkel-Mathisson supplementary condition
are studied in a Schwarzschild field. The choice of solutions, which describe
the motions of the proper center of mass of a spinning test particle, is
discussed, and the calculation procedure for highly relativistic motions is
proposed. The v... | [
{
"created": "Tue, 5 Feb 2008 16:01:09 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Plyatsko",
"Roman",
""
],
[
"Stefanyshyn",
"Oleksandr",
""
]
] | The Mathisson equations under the Frenkel-Mathisson supplementary condition are studied in a Schwarzschild field. The choice of solutions, which describe the motions of the proper center of mass of a spinning test particle, is discussed, and the calculation procedure for highly relativistic motions is proposed. The ver... |
0811.0312 | Mikhail Smolyakov | Mikhail N. Smolyakov | Maximally symmetric spaces in Brans-Dicke theory and the cosmological
constant | 4 pages, LaTeX | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note we discuss a toy model in which the value of the effective
cosmological constant is associated with a symmetry properties of the vacuum
background solution and defined by the model parameter associated with a scalar
field non-minimally coupled to gravity. Although the parameters in the model
seem to have... | [
{
"created": "Mon, 3 Nov 2008 14:56:19 GMT",
"version": "v1"
}
] | 2008-11-04 | [
[
"Smolyakov",
"Mikhail N.",
""
]
] | In this note we discuss a toy model in which the value of the effective cosmological constant is associated with a symmetry properties of the vacuum background solution and defined by the model parameter associated with a scalar field non-minimally coupled to gravity. Although the parameters in the model seem to have u... |
2108.00374 | Pardyumn Kumar Sahoo | Gaurav Gadbail, Simran Arora, P.K. Sahoo | Power-law cosmology in Weyl-type $f(Q,T)$ gravity | Revised version submitted EPJP | Eur. Phys. J. Plus 136, 1040 (2021) | 10.1140/epjp/s13360-021-02048-w | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | Gravity is attributed to the spacetime curvature in classical General
Relativity (GR). But, other equivalent formulation or representations of GR,
such as torsion or non-metricity have altered the perception. We consider the
Weyl-type $f(Q, T)$ gravity, where $Q$ represents the non-metricity and $T$ is
the trace of e... | [
{
"created": "Sun, 1 Aug 2021 06:29:59 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Sep 2021 16:06:47 GMT",
"version": "v2"
}
] | 2021-10-20 | [
[
"Gadbail",
"Gaurav",
""
],
[
"Arora",
"Simran",
""
],
[
"Sahoo",
"P. K.",
""
]
] | Gravity is attributed to the spacetime curvature in classical General Relativity (GR). But, other equivalent formulation or representations of GR, such as torsion or non-metricity have altered the perception. We consider the Weyl-type $f(Q, T)$ gravity, where $Q$ represents the non-metricity and $T$ is the trace of ene... |
1006.3672 | Luca Fabbri | Luca Fabbri | On geometric relativistic foundations of matter field equations and
plane wave solutions | 11 pages | Mod.Phys.Lett.A27, 1250028 (2012) | 10.1142/S0217732312500289 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we start from the geometric relativistic foundations to define
the basis upon which matter field theories are built, and their wave solutions
are investigated, finding that they display repulsive interactions able to
reproduce the exclusion principle in terms of its effects in a dynamical way,
then dis... | [
{
"created": "Fri, 18 Jun 2010 12:02:16 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Oct 2010 13:59:42 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Jun 2012 12:18:00 GMT",
"version": "v3"
}
] | 2012-08-23 | [
[
"Fabbri",
"Luca",
""
]
] | In this paper, we start from the geometric relativistic foundations to define the basis upon which matter field theories are built, and their wave solutions are investigated, finding that they display repulsive interactions able to reproduce the exclusion principle in terms of its effects in a dynamical way, then discu... |
gr-qc/9911026 | Grigori Volovik | G.E. Volovik | Vierbein walls in condensed matter | 4 pages, no figures | Pisma Zh.Eksp.Teor.Fiz. 70 (1999) 705-710; JETP Lett. 70 (1999)
711-716 | 10.1134/1.568251 | null | gr-qc cond-mat hep-ph | null | The effective field, which plays the part of the vierbein in general
relativity, can have topologically stable surfaces, vierbein domain walls,
where the effective contravariant metric is degenerate. We consider vierbein
walls separating domains with the flat space-time which are not causally
connected at the classic... | [
{
"created": "Mon, 8 Nov 1999 16:53:16 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Volovik",
"G. E.",
""
]
] | The effective field, which plays the part of the vierbein in general relativity, can have topologically stable surfaces, vierbein domain walls, where the effective contravariant metric is degenerate. We consider vierbein walls separating domains with the flat space-time which are not causally connected at the classical... |
1107.2520 | Daniele Nicolodi | A. Cavalleri, G. Ciani, R. Dolesi, A. Heptonstall, M. Hueller, D.
Nicolodi, S. Rowan, D. Tombolato, S. Vitale, P. J. Wass, and W. J. Weber | Increased Brownian force noise from molecular impacts in a constrained
volume | 4 pages, 5 figures | Phys. Rev. Lett. 103, 140601 (2009) | 10.1103/PhysRevLett.103.140601 | null | gr-qc physics.class-ph physics.ins-det | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report on residual gas damping of the motion of a macroscopic test mass
enclosed in a nearby housing in the molecular flow regime. The damping
coefficient, and thus the associated thermal force noise, is found to increase
significantly when the distance between test mass and surrounding walls is
smaller than the t... | [
{
"created": "Wed, 13 Jul 2011 10:57:09 GMT",
"version": "v1"
}
] | 2011-07-14 | [
[
"Cavalleri",
"A.",
""
],
[
"Ciani",
"G.",
""
],
[
"Dolesi",
"R.",
""
],
[
"Heptonstall",
"A.",
""
],
[
"Hueller",
"M.",
""
],
[
"Nicolodi",
"D.",
""
],
[
"Rowan",
"S.",
""
],
[
"Tombolato",
"D."... | We report on residual gas damping of the motion of a macroscopic test mass enclosed in a nearby housing in the molecular flow regime. The damping coefficient, and thus the associated thermal force noise, is found to increase significantly when the distance between test mass and surrounding walls is smaller than the tes... |
2003.03563 | Genly Le\'on | Genly Leon (Catolica del Norte U.), Esteban Gonz\'alez (Universidad de
Aconcagua, Chile), Alfredo D. Millano (Catolica del Norte U.), Felipe Orlando
Franz Silva | A Perturbative Analysis of Interacting Scalar Field Cosmologies | 47 pages, 31 compound figures. Reduced and improved version. The
analysis was redone and a new perspective was taken. New authors participated | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar field cosmologies with a generalized harmonic potential are
investigated in flat and negatively curved
Friedmann-Lema\^itre-Robertson-Walker and Bianchi I metrics. An interaction
between the scalar field and matter is considered. Asymptotic methods and
averaging theory are used to obtain relevant information a... | [
{
"created": "Sat, 7 Mar 2020 11:53:05 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Nov 2020 18:13:44 GMT",
"version": "v2"
},
{
"created": "Sun, 16 Jan 2022 00:41:29 GMT",
"version": "v3"
}
] | 2022-01-19 | [
[
"Leon",
"Genly",
"",
"Catolica del Norte U."
],
[
"González",
"Esteban",
"",
"Universidad de\n Aconcagua, Chile"
],
[
"Millano",
"Alfredo D.",
"",
"Catolica del Norte U."
],
[
"Silva",
"Felipe Orlando Franz",
""
]
] | Scalar field cosmologies with a generalized harmonic potential are investigated in flat and negatively curved Friedmann-Lema\^itre-Robertson-Walker and Bianchi I metrics. An interaction between the scalar field and matter is considered. Asymptotic methods and averaging theory are used to obtain relevant information abo... |
1410.6042 | Andrew Williamson | A. R. Williamson, C. Biwer, S. Fairhurst, I. W. Harry, E. Macdonald,
D. Macleod, V. Predoi | Improved methods for detecting gravitational waves associated with short
gamma-ray bursts | 13 pages, 6 figures | Phys. Rev. D 90, 122004 (2014) | 10.1103/PhysRevD.90.122004 | LIGO-P1400044 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the era of second generation ground-based gravitational wave detectors,
short gamma-ray bursts (GRBs) will be among the most promising astrophysical
events for joint electromagnetic and gravitational wave observation. A targeted
search for gravitational wave compact binary merger signals in coincidence with
short ... | [
{
"created": "Wed, 22 Oct 2014 13:47:26 GMT",
"version": "v1"
}
] | 2014-12-31 | [
[
"Williamson",
"A. R.",
""
],
[
"Biwer",
"C.",
""
],
[
"Fairhurst",
"S.",
""
],
[
"Harry",
"I. W.",
""
],
[
"Macdonald",
"E.",
""
],
[
"Macleod",
"D.",
""
],
[
"Predoi",
"V.",
""
]
] | In the era of second generation ground-based gravitational wave detectors, short gamma-ray bursts (GRBs) will be among the most promising astrophysical events for joint electromagnetic and gravitational wave observation. A targeted search for gravitational wave compact binary merger signals in coincidence with short GR... |
2012.05847 | Joao Magueijo | Joao Magueijo (Imperial College) | The real Chern-Simons wave function | Version accepted for publication | Phys. Rev. D 104, 026002 (2021) | 10.1103/PhysRevD.104.026002 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We examine the status of the Chern-Simons (or Kodama) state from the point of
view of a formulation of gravity that uses only real connection and metric
variables and a real action. We may package the {\it real} connection variables
into the complex Self-Dual Ashtekar connection (and will do so to make contact
with p... | [
{
"created": "Thu, 10 Dec 2020 17:39:41 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Jun 2021 09:36:18 GMT",
"version": "v2"
}
] | 2021-07-07 | [
[
"Magueijo",
"Joao",
"",
"Imperial College"
]
] | We examine the status of the Chern-Simons (or Kodama) state from the point of view of a formulation of gravity that uses only real connection and metric variables and a real action. We may package the {\it real} connection variables into the complex Self-Dual Ashtekar connection (and will do so to make contact with pre... |
2111.05341 | Wei-Xiang Feng | Wei-Xiang Feng | On the Dynamical Instability of Monatomic Fluid Spheres in
(N+1)-Dimensional Spacetime | 28 pages, 4 figures, 6 tables. Typos corrected; version accepted for
publication in the Special Issue of Astronomy: Feature Papers in the
Astronomical Sciences | Astronomy 2 (1), 22-46 (2023) | 10.3390/astronomy2010004 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | In this note, I derive the Chandrasekhar instability of a fluid sphere in
($N$+1)-dimensional Schwarzschild-Tangherlini spacetime and take the
homogeneous (uniform energy density) solution for illustration. Qualitatively,
the effect of positive (negative) cosmological constant tends to destabilize
(stabilize) the sph... | [
{
"created": "Tue, 9 Nov 2021 19:00:00 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Dec 2021 19:00:00 GMT",
"version": "v2"
},
{
"created": "Thu, 15 Sep 2022 07:43:32 GMT",
"version": "v3"
},
{
"created": "Tue, 7 Mar 2023 15:52:10 GMT",
"version": "v4"
}
] | 2023-03-08 | [
[
"Feng",
"Wei-Xiang",
""
]
] | In this note, I derive the Chandrasekhar instability of a fluid sphere in ($N$+1)-dimensional Schwarzschild-Tangherlini spacetime and take the homogeneous (uniform energy density) solution for illustration. Qualitatively, the effect of positive (negative) cosmological constant tends to destabilize (stabilize) the spher... |
2307.04060 | Yun Soo Myung | Yun Soo Myung | Double instability of Schwarzschild black holes in Einstein-Weyl-scalar
theory | 12 pages, 2 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the stability of Schwarzschild black hole in Einstein-Weyl-scalar
(EWS) theory with a quadratic scalar coupling to the Weyl term. Its linearized
theory admits the Lichnerowicz equation for Ricci tensor as well as scalar
equation. The linearized Ricci-tensor carries with a regular mass term
($m^2_2$), whereas... | [
{
"created": "Sat, 8 Jul 2023 23:39:16 GMT",
"version": "v1"
}
] | 2023-07-11 | [
[
"Myung",
"Yun Soo",
""
]
] | We study the stability of Schwarzschild black hole in Einstein-Weyl-scalar (EWS) theory with a quadratic scalar coupling to the Weyl term. Its linearized theory admits the Lichnerowicz equation for Ricci tensor as well as scalar equation. The linearized Ricci-tensor carries with a regular mass term ($m^2_2$), whereas t... |
gr-qc/0609082 | Boris Hikin L | Boris Hikin | Tensor Potential Description of Matter and Space, II Semi-guage and the
Law of Conservation | 9 pages | null | null | null | gr-qc | null | Considered a unified field theory approach describing matter and space
(metric tensor) by means of a 3-index tensor $P^{i}_{jk}$. It is shown that if
the Lagrangian has partial U(1) gauge (semi-gauge) of the type
$P^{i}_{jk}->P^{i}_{jk}+a \delta{^i_j} \phi{_{,k}}+b \delta{^i_k}
\phi{_{,j}}+cg_{jk}g^{mi} \phi{_{,m}}$ ... | [
{
"created": "Wed, 20 Sep 2006 15:11:35 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Hikin",
"Boris",
""
]
] | Considered a unified field theory approach describing matter and space (metric tensor) by means of a 3-index tensor $P^{i}_{jk}$. It is shown that if the Lagrangian has partial U(1) gauge (semi-gauge) of the type $P^{i}_{jk}->P^{i}_{jk}+a \delta{^i_j} \phi{_{,k}}+b \delta{^i_k} \phi{_{,j}}+cg_{jk}g^{mi} \phi{_{,m}}$ wh... |
gr-qc/9602001 | Jorge Pullin | Jorge Pullin | Matters of Gravity, Newsletter of the APS TGG on gravitation, number 7 | available in http://vishnu.nirvana.phys.psu.edu/mog.html | null | null | MOG-7 | gr-qc | null | Contents:
Editorial, J. Pullin
Report from the APS TGG, Beverly Berger
We hear that..., J. Pullin
LIGO project status, S. Whitcomb
General relativity survives another test, C. Will
Macroscopic deviations from Hawking radiation? L. Smolin
Event horizons and topological censorship, E. Seidel
Critical be... | [
{
"created": "Thu, 1 Feb 1996 15:33:10 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Pullin",
"Jorge",
""
]
] | Contents: Editorial, J. Pullin Report from the APS TGG, Beverly Berger We hear that..., J. Pullin LIGO project status, S. Whitcomb General relativity survives another test, C. Will Macroscopic deviations from Hawking radiation? L. Smolin Event horizons and topological censorship, E. Seidel Critical behavior in black ho... |
1104.1661 | Jose Martinez-Morales L. | Jose L. Martinez-Morales | The semi classical cosmology approximation for a Friedman Robertson
Walker geometry coupled to a field | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The semi classical cosmology approximation for a Friedman Robertson Walker
geometry coupled to a field is considered. A power series of the field with
coefficients that depend on the radius of the geometry is proposed, and the
equations for the coefficients are solved.
| [
{
"created": "Fri, 8 Apr 2011 23:40:34 GMT",
"version": "v1"
}
] | 2011-04-12 | [
[
"Martinez-Morales",
"Jose L.",
""
]
] | The semi classical cosmology approximation for a Friedman Robertson Walker geometry coupled to a field is considered. A power series of the field with coefficients that depend on the radius of the geometry is proposed, and the equations for the coefficients are solved. |
gr-qc/0301107 | Reinhard Meinel | Gernot Neugebauer, Andreas Kleinw\"achter and Reinhard Meinel | Relativistically rotating dust | 18 pages, 11 figures | Helv.Phys.Acta 69:472,1996 | null | null | gr-qc | null | Dust configurations play an important role in astrophysics and are the
simplest models for rotating bodies. The physical properties of the
general--relativistic global solution for the rigidly rotating disk of dust,
which has been found recently as the solution of a boundary value problem, are
discussed.
| [
{
"created": "Mon, 27 Jan 2003 14:46:31 GMT",
"version": "v1"
}
] | 2010-12-23 | [
[
"Neugebauer",
"Gernot",
""
],
[
"Kleinwächter",
"Andreas",
""
],
[
"Meinel",
"Reinhard",
""
]
] | Dust configurations play an important role in astrophysics and are the simplest models for rotating bodies. The physical properties of the general--relativistic global solution for the rigidly rotating disk of dust, which has been found recently as the solution of a boundary value problem, are discussed. |
gr-qc/0512029 | Claudio Simeone | Marc Thibeault, Claudio Simeone, Ernesto F. Eiroa | Thin-shell wormholes in Einstein-Maxwell theory with a Gauss-Bonnet term | 13 pages, 6 figures; v2: minor changes and new references added.
Accepted for publication in General Relativity and Gravitation | Gen.Rel.Grav.38:1593-1608,2006 | 10.1007/s10714-006-0324-z | null | gr-qc hep-th | null | We study five dimensional thin-shell wormholes in Einstein-Maxwell theory
with a Gauss-Bonnet term. The linearized stability under radial perturbations
and the amount of exotic matter are analyzed as a function of the parameters of
the model. We find that the inclusion of the quadratic correction substantially
widens... | [
{
"created": "Mon, 5 Dec 2005 18:53:52 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Jul 2006 14:37:10 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Thibeault",
"Marc",
""
],
[
"Simeone",
"Claudio",
""
],
[
"Eiroa",
"Ernesto F.",
""
]
] | We study five dimensional thin-shell wormholes in Einstein-Maxwell theory with a Gauss-Bonnet term. The linearized stability under radial perturbations and the amount of exotic matter are analyzed as a function of the parameters of the model. We find that the inclusion of the quadratic correction substantially widens t... |
1011.6024 | Michele Levi | Barak Kol, Michele Levi, Michael Smolkin | Comparing space+time decompositions in the post-Newtonian limit | 11 pages, 3 figures; v2: published | Class.Quant.Grav.28:145021,2011 | 10.1088/0264-9381/28/14/145021 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relationship between the Arnowitt-Deser-Misner (ADM) field decomposition
and the non-relativistic gravitational (NRG) fields attracted considerable
interest recently. This paper compares the two, especially with respect to
computing the two-body post-Newtonian (PN) effective action within the
effective field theo... | [
{
"created": "Sun, 28 Nov 2010 10:09:17 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Jun 2011 15:21:38 GMT",
"version": "v2"
}
] | 2011-08-19 | [
[
"Kol",
"Barak",
""
],
[
"Levi",
"Michele",
""
],
[
"Smolkin",
"Michael",
""
]
] | The relationship between the Arnowitt-Deser-Misner (ADM) field decomposition and the non-relativistic gravitational (NRG) fields attracted considerable interest recently. This paper compares the two, especially with respect to computing the two-body post-Newtonian (PN) effective action within the effective field theory... |
1412.2960 | Thomas B\"ackdahl | Lars Andersson, Thomas B\"ackdahl and Pieter Blue | A new tensorial conservation law for Maxwell fields on the Kerr
background | 7 pages | J. Differential Geom. 105, no. 2, 163--176 (2017) | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new, conserved, symmetric tensor field for a source-free Maxwell test field
on a four-dimensional spacetime with a conformal Killing-Yano tensor,
satisfying a certain compatibility condition, is introduced. In particular,
this construction works for the Kerr spacetime.
| [
{
"created": "Tue, 9 Dec 2014 14:02:33 GMT",
"version": "v1"
}
] | 2017-02-10 | [
[
"Andersson",
"Lars",
""
],
[
"Bäckdahl",
"Thomas",
""
],
[
"Blue",
"Pieter",
""
]
] | A new, conserved, symmetric tensor field for a source-free Maxwell test field on a four-dimensional spacetime with a conformal Killing-Yano tensor, satisfying a certain compatibility condition, is introduced. In particular, this construction works for the Kerr spacetime. |
1305.6688 | Myungseok Eune | Myungseok Eune and Wontae Kim | Emergent Friedmann equation from the evolution of cosmic space revisited | 8 pages, no figure, Version accepted for publication in PRD | Phys. Rev. D 88, 067303 (2013) | 10.1103/PhysRevD.88.067303 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following the recent study on the emergent Friedmann equation from the
expansion of cosmic space for a flat universe, we apply this method to a
nonflat universe, and modify the evolution equation to lead to the Friedmann
equation. In order to maintain the same form with the original evolution
equation, we have to def... | [
{
"created": "Wed, 29 May 2013 04:25:18 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Sep 2013 06:22:52 GMT",
"version": "v2"
}
] | 2013-10-08 | [
[
"Eune",
"Myungseok",
""
],
[
"Kim",
"Wontae",
""
]
] | Following the recent study on the emergent Friedmann equation from the expansion of cosmic space for a flat universe, we apply this method to a nonflat universe, and modify the evolution equation to lead to the Friedmann equation. In order to maintain the same form with the original evolution equation, we have to defin... |
2303.12457 | Jo\~ao Lu\'is Rosa | Jo\~ao Lu\'is Rosa, Sante Carloni | Junction conditions for LRS spacetimes in the $1+1+2$ covariant
formalism | 23 pages. Several additions with respect to previous version | Phys. Rev. D 109, 104037 (2024) | 10.1103/PhysRevD.109.104037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the distribution formalism to derive the complete set of junction
conditions for general Local Rotationally Symmetric (LRS) spacetimes in the
$1+1+2$ covariant formalism. We start by developing a parametric framework
encompassing timelike, spacelike, or null hypersurfaces. We then introduce the
distribution fo... | [
{
"created": "Wed, 22 Mar 2023 11:06:36 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Feb 2024 12:29:46 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Apr 2024 20:00:29 GMT",
"version": "v3"
}
] | 2024-05-14 | [
[
"Rosa",
"João Luís",
""
],
[
"Carloni",
"Sante",
""
]
] | We use the distribution formalism to derive the complete set of junction conditions for general Local Rotationally Symmetric (LRS) spacetimes in the $1+1+2$ covariant formalism. We start by developing a parametric framework encompassing timelike, spacelike, or null hypersurfaces. We then introduce the distribution form... |
2110.07335 | Antonio Gallerati | Giovanni Ummarino and Antonio Gallerati | Superconductor in static gravitational, electric and magnetic fields
with vortex lattice | 17 pages, 2 figures, 1 table (corrected figure scales) | Results in Physics 30 (2021) 104838 | 10.1016/j.rinp.2021.104838 | null | gr-qc cond-mat.supr-con hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We estimate the conjectured interaction between the Earth gravitational field
and a superconductor immersed in external, static electric and magnetic field.
The latter is close to the sample upper critical field and generates the
presence of a vortex lattice. The proposed interaction could lead to multiple,
measurabl... | [
{
"created": "Thu, 14 Oct 2021 13:08:41 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Feb 2022 16:04:38 GMT",
"version": "v2"
}
] | 2022-02-04 | [
[
"Ummarino",
"Giovanni",
""
],
[
"Gallerati",
"Antonio",
""
]
] | We estimate the conjectured interaction between the Earth gravitational field and a superconductor immersed in external, static electric and magnetic field. The latter is close to the sample upper critical field and generates the presence of a vortex lattice. The proposed interaction could lead to multiple, measurable ... |
1907.05868 | Rong-Jia Yang | Yaoguang Zheng, Rong-Jia Yang | Entropy and Energy of Static Spherically Symmetric Black Hole in $f(R)$
theory | 10 pages, no picture | Universe 2020, 6, 47 | 10.3390/universe6030047 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the new horizon first law in $f(R)$ theory with general
spherically symmetric black hole. We derive the general formulas to computed
the entropy and energy of the black hole. For applications, some nontrivial
black hole solutions in some popular $f(R)$ theories are investigated, the
entropies and the ener... | [
{
"created": "Thu, 11 Jul 2019 14:56:38 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Dec 2019 14:13:24 GMT",
"version": "v2"
},
{
"created": "Mon, 30 Mar 2020 13:29:00 GMT",
"version": "v3"
}
] | 2020-03-31 | [
[
"Zheng",
"Yaoguang",
""
],
[
"Yang",
"Rong-Jia",
""
]
] | We consider the new horizon first law in $f(R)$ theory with general spherically symmetric black hole. We derive the general formulas to computed the entropy and energy of the black hole. For applications, some nontrivial black hole solutions in some popular $f(R)$ theories are investigated, the entropies and the energi... |
1005.3696 | Christoph Solveen | Christoph Solveen | Local Thermal Equilibrium in Quantum Field Theory on Flat and Curved
Spacetimes | 16 pages, some minor changes and clarifications; section 4 has been
shortened as some unnecessary constructions have been removed | Class.Quant.Grav.27:235002,2010 | 10.1088/0264-9381/27/23/235002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of local thermal equilibrium (LTE) states for quantum field
theory in the sense of Buchholz, Ojima and Roos is discussed in a
model-independent setting. It is shown that for spaces of finitely many
independent thermal observables there always exist states which are in LTE in
any compact region of Minkow... | [
{
"created": "Thu, 20 May 2010 13:43:04 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Nov 2010 09:51:51 GMT",
"version": "v2"
}
] | 2010-11-05 | [
[
"Solveen",
"Christoph",
""
]
] | The existence of local thermal equilibrium (LTE) states for quantum field theory in the sense of Buchholz, Ojima and Roos is discussed in a model-independent setting. It is shown that for spaces of finitely many independent thermal observables there always exist states which are in LTE in any compact region of Minkowsk... |
1906.09405 | Andrzej Okolow | Andrzej Okolow | Does time always slow down as gravity increases? | 32 pages, 5 figures, LaTeX, minor changes, linguistic mistakes
corrected | Eur. J. Phys. 41 (2020) 023001 | 10.1088/1361-6404/ab60bb | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We consider gravitational time dilation between stationary observers and
present examples, which contradict the statement that "time slows down as
gravity increases". We show furthermore that this statement cannot be true in
general, if strength of gravity is defined in an observer independent manner.
We provide also... | [
{
"created": "Sat, 22 Jun 2019 07:33:33 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Aug 2019 14:29:09 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Feb 2020 21:25:00 GMT",
"version": "v3"
},
{
"created": "Wed, 24 Feb 2021 15:19:11 GMT",
"version": "v4"
}
] | 2021-02-25 | [
[
"Okolow",
"Andrzej",
""
]
] | We consider gravitational time dilation between stationary observers and present examples, which contradict the statement that "time slows down as gravity increases". We show furthermore that this statement cannot be true in general, if strength of gravity is defined in an observer independent manner. We provide also a... |
gr-qc/9610021 | Diego Torres | Diego F. Torres | Slow Roll Inflation in Non-Minimally Coupled Theories: Hyperextended
Gravity Approach | latex file, 12 pages, no figures | Phys.Lett. A225 (1997) 13-17 | 10.1016/S0375-9601(96)00835-3 | null | gr-qc | null | The slow roll approximation is studied for cosmological models in
Hyperextended Scalar-Tensor Theories of Gravity. A procedure to obtain slow
roll solutions in non-minimally coupled gravity is outlined and some examples
are provided. An integral condition over the functional form of the non-minimal
coupling is impose... | [
{
"created": "Thu, 10 Oct 1996 12:26:19 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Torres",
"Diego F.",
""
]
] | The slow roll approximation is studied for cosmological models in Hyperextended Scalar-Tensor Theories of Gravity. A procedure to obtain slow roll solutions in non-minimally coupled gravity is outlined and some examples are provided. An integral condition over the functional form of the non-minimal coupling is imposed ... |
2406.11926 | Karan Jani | Shobhit Ranjan, Karan Jani, Alexander H. Nitz, Kelly
Holley-Bockelmann, Curt Cutler | A Tale of Two Black Holes: Multiband Gravitational-Wave Measurement of
Recoil Kicks | 11 pages, 4 figures, 2 tables | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | The non-linear dynamics of General Relativity leave their imprint on remnants
of black hole mergers in the form of a recoil ``kick''. The kick has profound
astrophysical implications across the black hole mass range from stellar to
super-massive. However, a robust measurement of the kick for generic binaries
from gra... | [
{
"created": "Mon, 17 Jun 2024 08:36:51 GMT",
"version": "v1"
}
] | 2024-06-19 | [
[
"Ranjan",
"Shobhit",
""
],
[
"Jani",
"Karan",
""
],
[
"Nitz",
"Alexander H.",
""
],
[
"Holley-Bockelmann",
"Kelly",
""
],
[
"Cutler",
"Curt",
""
]
] | The non-linear dynamics of General Relativity leave their imprint on remnants of black hole mergers in the form of a recoil ``kick''. The kick has profound astrophysical implications across the black hole mass range from stellar to super-massive. However, a robust measurement of the kick for generic binaries from gravi... |
2407.17006 | Mohammad Sami | Sayantan Choudhury, M. Sami | Large fluctuations and Primordial Black Holes | 322 pages, 80 figures, 7 tables, Invited Physics Reports review,
Dedicated to the memory of Alexei A. Starobinsky, Criticism and comments are
most welcome | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we review in detail different mechanisms of generation of
large primordial fluctuations and their implications for the production of
primordial black holes (PBHs) and scalar-induced secondary gravity waves
(SIGW), with the ultimate aim of understanding the impact of loop correction on
quantum correlati... | [
{
"created": "Wed, 24 Jul 2024 05:06:33 GMT",
"version": "v1"
}
] | 2024-07-25 | [
[
"Choudhury",
"Sayantan",
""
],
[
"Sami",
"M.",
""
]
] | In this paper, we review in detail different mechanisms of generation of large primordial fluctuations and their implications for the production of primordial black holes (PBHs) and scalar-induced secondary gravity waves (SIGW), with the ultimate aim of understanding the impact of loop correction on quantum correlation... |
2202.09038 | RuiFeng Zheng | Ruifeng Zheng, Taotao Qiu | Can the Quantization of Black Hole be detected? | 9 pages, 4 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | As a mysterious celestial body predicted by General Relativity, black holes
have been confirmed by observations in recent years. But there are still many
unknown properties waiting for us to discover, one of the famous problems is
the quantization of black holes. The quantization of black holes gives new
research sig... | [
{
"created": "Fri, 18 Feb 2022 06:15:14 GMT",
"version": "v1"
}
] | 2022-02-21 | [
[
"Zheng",
"Ruifeng",
""
],
[
"Qiu",
"Taotao",
""
]
] | As a mysterious celestial body predicted by General Relativity, black holes have been confirmed by observations in recent years. But there are still many unknown properties waiting for us to discover, one of the famous problems is the quantization of black holes. The quantization of black holes gives new research signi... |
1903.03098 | Emmanuil Saridakis | Shin'ichi Nojiri, Sergei D. Odintsov, Emmanuel N. Saridakis | Modified cosmology from extended entropy with varying exponent | 10 pages, 2 figures, to appear in Eur.Phys.J. C | null | 10.1140/epjc/s10052-019-6740-5 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a modified cosmological scenario that arises from the application
of non-extensive thermodynamics with varying exponent. We extract the modified
Friedmann equations, which contain new terms quantified by the non-extensive
exponent, possessing standard $\Lambda$CDM cosmology as a subcase. Concerning
the uni... | [
{
"created": "Thu, 7 Mar 2019 18:49:31 GMT",
"version": "v1"
}
] | 2019-03-27 | [
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | We present a modified cosmological scenario that arises from the application of non-extensive thermodynamics with varying exponent. We extract the modified Friedmann equations, which contain new terms quantified by the non-extensive exponent, possessing standard $\Lambda$CDM cosmology as a subcase. Concerning the unive... |
1006.5541 | Julian Berengut | G. H. Gossel, J. C. Berengut and V. V. Flambaum | Energy levels of a scalar particle in a static gravitational field close
to the black hole limit | 5 pages, 3 figures; minor text changes | Gen.Rel.Grav.43:2673-2683,2011 | 10.1007/s10714-011-1191-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The bound-state energy levels of a scalar particle in the gravitational field
of finite-sized objects with interiors described by the Florides and
Schwarzschild metrics are found. For these metrics, bound states with zero
energy (where the binding energy is equal to the mass of the scalar particle)
only exist when a ... | [
{
"created": "Tue, 29 Jun 2010 08:40:58 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Jul 2010 05:53:34 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Nov 2010 05:08:40 GMT",
"version": "v3"
}
] | 2011-09-28 | [
[
"Gossel",
"G. H.",
""
],
[
"Berengut",
"J. C.",
""
],
[
"Flambaum",
"V. V.",
""
]
] | The bound-state energy levels of a scalar particle in the gravitational field of finite-sized objects with interiors described by the Florides and Schwarzschild metrics are found. For these metrics, bound states with zero energy (where the binding energy is equal to the mass of the scalar particle) only exist when a si... |
gr-qc/0206014 | Sergiu Vacaru | Sergiu Vacaru | Horizons and Geodesics of Black Ellipsoids | Published variant in IJMPD with modifications in some formulas,
conclusions and new references | Int.J.Mod.Phys. D12 (2003) 479-494 | 10.1142/S021827180300272X | null | gr-qc astro-ph hep-th math-ph math.DG math.MP | null | We analyze the horizon and geodesic structure of a class of 4D off--diagonal
metrics with deformed spherical symmetries, which are exact solutions of the
vacuum Einstein equations with anholonomic variables. The maximal analytic
extension of the ellipsoid type metrics are constructed and the Penrose
diagrams are anal... | [
{
"created": "Wed, 5 Jun 2002 20:00:06 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Aug 2002 13:30:37 GMT",
"version": "v2"
},
{
"created": "Mon, 21 Jul 2003 16:31:14 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Vacaru",
"Sergiu",
""
]
] | We analyze the horizon and geodesic structure of a class of 4D off--diagonal metrics with deformed spherical symmetries, which are exact solutions of the vacuum Einstein equations with anholonomic variables. The maximal analytic extension of the ellipsoid type metrics are constructed and the Penrose diagrams are analyz... |
gr-qc/9802041 | Zloshchastiev Konstantin | Konstantin G. Zloshchastiev | Barotropic thin shells with linear EOS as models of stars and
circumstellar shells in general relativity | final version; ps-version of figure is available by email request to
zlosh@email.com | Int.J.Mod.Phys. D8 (1999) 549-555 | 10.1142/S0218271899000389 | null | gr-qc astro-ph | null | The spherically symmetric thin shells of the barotropic fluids with the
linear equation of state are considered within the frameworks of general
relativity. We study several aspects of the shells as completely relativistic
models of stars, first of all the neutron stars and white dwarfs, and
circumstellar shells. The... | [
{
"created": "Tue, 17 Feb 1998 11:36:13 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Feb 1998 11:24:01 GMT",
"version": "v2"
},
{
"created": "Sun, 16 May 1999 19:02:11 GMT",
"version": "v3"
},
{
"created": "Fri, 3 Sep 1999 12:33:59 GMT",
"version": "v4"
}
] | 2009-10-31 | [
[
"Zloshchastiev",
"Konstantin G.",
""
]
] | The spherically symmetric thin shells of the barotropic fluids with the linear equation of state are considered within the frameworks of general relativity. We study several aspects of the shells as completely relativistic models of stars, first of all the neutron stars and white dwarfs, and circumstellar shells. The e... |
2303.12690 | Cameron Bunney | Cameron R. D. Bunney and Jorma Louko | Circular motion analogue Unruh effect in a $2+1$ thermal bath: Robbing
from the rich and giving to the poor | 24 pages, 5 figures. v2: references added, typos corrected. v3:
references added, section 2 expanded after referee comments, typos corrected | Class. Quantum Grav. 40 155001 (2023) | 10.1088/1361-6382/acde3b | null | gr-qc cond-mat.quant-gas hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Unruh effect states that a uniformly linearly accelerated observer with
proper acceleration $a$ experiences the Minkowski vacuum as a thermal state at
temperature $T_U=a/(2\pi)$. An observer in uniform circular motion experiences
a similar effective temperature, operationally defined in terms of excitation
and de... | [
{
"created": "Wed, 22 Mar 2023 16:37:40 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Mar 2023 09:05:02 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Jun 2023 13:45:59 GMT",
"version": "v3"
}
] | 2023-06-29 | [
[
"Bunney",
"Cameron R. D.",
""
],
[
"Louko",
"Jorma",
""
]
] | The Unruh effect states that a uniformly linearly accelerated observer with proper acceleration $a$ experiences the Minkowski vacuum as a thermal state at temperature $T_U=a/(2\pi)$. An observer in uniform circular motion experiences a similar effective temperature, operationally defined in terms of excitation and de-e... |
1609.00811 | Sergey Cherkas L | S. L. Cherkas, V.L. Kalashnikov | Theory of gravity admitting arbitrary choice of the energy density
reference level | 16 pages, 4 figures | Proc. Natl. Acad. Sci. Belarus, Ser. Phys.-Math. 55, 83-96 (2019) | 10.29235/1561-2430-2019-55-1-83-96 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Five-vectors theory of gravity is proposed, which admits an arbitrary choice
of the energy density reference level. This theory is formulated as the
constraint theory, where the Lagrange multipliers turn out to be restricted to
some class of vector fields unlike the General Relativity (GR), where they are
arbitrary. ... | [
{
"created": "Sat, 3 Sep 2016 10:19:33 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Oct 2016 09:15:56 GMT",
"version": "v2"
},
{
"created": "Thu, 27 Oct 2016 10:23:32 GMT",
"version": "v3"
},
{
"created": "Mon, 10 Jul 2017 07:32:36 GMT",
"version": "v4"
},
{
"cr... | 2019-04-02 | [
[
"Cherkas",
"S. L.",
""
],
[
"Kalashnikov",
"V. L.",
""
]
] | Five-vectors theory of gravity is proposed, which admits an arbitrary choice of the energy density reference level. This theory is formulated as the constraint theory, where the Lagrange multipliers turn out to be restricted to some class of vector fields unlike the General Relativity (GR), where they are arbitrary. Th... |
0811.2322 | Bin Wang | Xi He, Bin Wang, Songbai Chen | Quasinormal modes of charged squashed Kaluza-Klein black holes in the
G\"{o}del Universe | 11 pages, 4 figures, revised version, accepted for publication in PRD | Phys.Rev.D79:084005,2009 | 10.1103/PhysRevD.79.084005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the quasinormal modes of scalar perturbation in the background of
five-dimensional charged Kaluza-Klein black holes with squashed horizons
immersed in the G\"{o}del universe. Besides the influence due to the
compactness of the extra dimension, we disclose the cosmological rotational
effect in the wave dynami... | [
{
"created": "Fri, 14 Nov 2008 11:49:04 GMT",
"version": "v1"
},
{
"created": "Sun, 22 Mar 2009 09:27:10 GMT",
"version": "v2"
}
] | 2009-04-22 | [
[
"He",
"Xi",
""
],
[
"Wang",
"Bin",
""
],
[
"Chen",
"Songbai",
""
]
] | We study the quasinormal modes of scalar perturbation in the background of five-dimensional charged Kaluza-Klein black holes with squashed horizons immersed in the G\"{o}del universe. Besides the influence due to the compactness of the extra dimension, we disclose the cosmological rotational effect in the wave dynamics... |
gr-qc/0403094 | Christophe Le Poncin-Lafitte | Christophe Le Poncin-Lafitte, Bernard Linet and Pierre Teyssandier | World function and time transfer: general post-Minkowskian expansions | Introduction is rewritten ; 2 references are added. 22 pages, no
figure | Class.Quant.Grav. 21 (2004) 4463-4484 | 10.1088/0264-9381/21/18/012 | null | gr-qc astro-ph | null | In suitably chosen domains of space-time, the world function may be a
powerful tool for modelling the deflection of light and the time/frequency
transfer. In this paper we work out a recursive procedure for expanding the
world function into a perturbative series of ascending powers of the Newtonian
gravitational cons... | [
{
"created": "Tue, 23 Mar 2004 13:37:01 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Aug 2004 14:41:32 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Poncin-Lafitte",
"Christophe Le",
""
],
[
"Linet",
"Bernard",
""
],
[
"Teyssandier",
"Pierre",
""
]
] | In suitably chosen domains of space-time, the world function may be a powerful tool for modelling the deflection of light and the time/frequency transfer. In this paper we work out a recursive procedure for expanding the world function into a perturbative series of ascending powers of the Newtonian gravitational consta... |
2102.08854 | Marek Cie\'slar | Marek Cie\'slar, Tomasz Bulik, Ma{\l}gorzata Cury{\l}o, Magdalena
Sieniawska, Neha Singh, Micha{\l} Bejger | Detectability of continuous gravitational waves from isolated neutron
stars in the Milky Way: the population synthesis approach | 10 pages, submitted to A&A | A&A 649, A92 (2021) | 10.1051/0004-6361/202039503 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Aims. We estimate the number of pulsars, detectable as continuous
gravitational wave sources with the current and future gravitational-wave
detectors, assuming a simple phenomenological model of evolving non-axisymmetry
of the rotating neutron star.
Methods. We employ a numerical model of the Galactic neutron star ... | [
{
"created": "Wed, 17 Feb 2021 16:25:58 GMT",
"version": "v1"
}
] | 2021-05-19 | [
[
"Cieślar",
"Marek",
""
],
[
"Bulik",
"Tomasz",
""
],
[
"Curyło",
"Małgorzata",
""
],
[
"Sieniawska",
"Magdalena",
""
],
[
"Singh",
"Neha",
""
],
[
"Bejger",
"Michał",
""
]
] | Aims. We estimate the number of pulsars, detectable as continuous gravitational wave sources with the current and future gravitational-wave detectors, assuming a simple phenomenological model of evolving non-axisymmetry of the rotating neutron star. Methods. We employ a numerical model of the Galactic neutron star popu... |
2407.08807 | Vania Vellucci | Julio Arrechea, Stefano Liberati, Vania Vellucci | Whispers from the quantum core: the ringdown of semiclassical stars | null | null | null | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | This investigation delves into the ringdown signals produced by semiclassical
stars, which are ultra-compact, regular solutions of the Einstein equations
incorporating stress-energy contributions from quantum vacuum polarization.
These stars exhibit an approximately Schwarzschild exterior and an interior
composed of ... | [
{
"created": "Thu, 11 Jul 2024 18:32:01 GMT",
"version": "v1"
}
] | 2024-07-15 | [
[
"Arrechea",
"Julio",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Vellucci",
"Vania",
""
]
] | This investigation delves into the ringdown signals produced by semiclassical stars, which are ultra-compact, regular solutions of the Einstein equations incorporating stress-energy contributions from quantum vacuum polarization. These stars exhibit an approximately Schwarzschild exterior and an interior composed of a ... |
1704.00078 | Lucas Lolli Savi | Lucas Lolli Savi | Reconsidering the horizon problem | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | It is argued that the spatial homogeneity of the early universe need not be
explained as having evolved from a previous inhomogeneous state. Rather, a
homogeneous cosmic initial condition follows from the Second Law of
Thermodynamics applied to gravitating systems.
| [
{
"created": "Fri, 31 Mar 2017 22:42:09 GMT",
"version": "v1"
},
{
"created": "Fri, 25 May 2018 21:12:33 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Jun 2018 20:55:19 GMT",
"version": "v3"
}
] | 2018-06-21 | [
[
"Savi",
"Lucas Lolli",
""
]
] | It is argued that the spatial homogeneity of the early universe need not be explained as having evolved from a previous inhomogeneous state. Rather, a homogeneous cosmic initial condition follows from the Second Law of Thermodynamics applied to gravitating systems. |
1204.4524 | Kent Yagi | Kent Yagi | New Constraint on Scalar Gauss-Bonnet Gravity and a Possible Explanation
for the Excess of the Orbital Decay Rate in a Low-Mass X-ray Binary | 5 pages, no figures; Published version, typos corrected, references
added | Phys. Rev. D 86, 081504(R) (2012) | 10.1103/PhysRevD.86.081504 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was recently shown that a black hole (BH) is the only compact object that
can acquire a scalar charge in scalar Gauss-Bonnet (sGB) theory under the small
coupling approximation. This leads to the fact that scalar radiation is emitted
from a binary containing at least one BH. In this letter, we find the
constraints... | [
{
"created": "Fri, 20 Apr 2012 03:35:07 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Feb 2013 05:42:13 GMT",
"version": "v2"
}
] | 2013-02-08 | [
[
"Yagi",
"Kent",
""
]
] | It was recently shown that a black hole (BH) is the only compact object that can acquire a scalar charge in scalar Gauss-Bonnet (sGB) theory under the small coupling approximation. This leads to the fact that scalar radiation is emitted from a binary containing at least one BH. In this letter, we find the constraints o... |
0812.3744 | Matt Visser | Angela White (Newcastle upon Tyne), Silke Weinfurtner (UBC Vancouver),
and Matt Visser (Victoria University of Wellington) | Signature change events: A challenge for quantum gravity? | 33 pages. 4 figures; V2: 3 references added, no physics changes; V3:
now 24 pages - significantly shortened - argument simplified and more focused
- no physics changes - this version accepted for publication in Classical and
Quantum Gravity | Class.Quant.Grav.27:045007,2010 | 10.1088/0264-9381/27/4/045007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the framework of either Euclidian (functional-integral) quantum
gravity or canonical general relativity the signature of the manifold is a
priori unconstrained. Furthermore, recent developments in the emergent
spacetime programme have led to a physically feasible implementation of
signature change events. This... | [
{
"created": "Fri, 19 Dec 2008 18:12:47 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jan 2009 23:15:36 GMT",
"version": "v2"
},
{
"created": "Wed, 6 Jan 2010 02:51:39 GMT",
"version": "v3"
}
] | 2010-04-15 | [
[
"White",
"Angela",
"",
"Newcastle upon Tyne"
],
[
"Weinfurtner",
"Silke",
"",
"UBC Vancouver"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | Within the framework of either Euclidian (functional-integral) quantum gravity or canonical general relativity the signature of the manifold is a priori unconstrained. Furthermore, recent developments in the emergent spacetime programme have led to a physically feasible implementation of signature change events. This s... |
gr-qc/9708070 | Leonid Grishchuk | L. P. Grishchuk | Signatures of Quantum Gravity in the Large-Scale Universe | 20 pages; crckapb.sty; contribution based on a talk given at the 4-th
Colloque Cosmologie, Paris, June 1997 | null | null | null | gr-qc astro-ph hep-ph quant-ph | null | The quantum gravity processes that have taken place in the very early
Universe are probably responsible for the observed large-scale cosmological
perturbations. The comparison of the theory with the detected microwave
background anisotropies favors the conclusion that the very early Universe was
not driven by a scala... | [
{
"created": "Thu, 28 Aug 1997 15:43:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Grishchuk",
"L. P.",
""
]
] | The quantum gravity processes that have taken place in the very early Universe are probably responsible for the observed large-scale cosmological perturbations. The comparison of the theory with the detected microwave background anisotropies favors the conclusion that the very early Universe was not driven by a scalar ... |
1106.6114 | Hyung Won Lee | Hyung Won Lee and Kyoung Yee Kim and Yun Soo Myung | Massive gravitons dark matter scenario revisited | 13 pages, 6 figures | null | 10.1142/S0217732312501465 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reexamine the massive graviton dark matter scenario (MGCDM) which was
recently considered as an alternative to dark energy models. When introducing
the native and effective equations of state (EoS), it is shown that there is no
phantom phase in the evolution toward the far past. Also we show that the past
accelera... | [
{
"created": "Thu, 30 Jun 2011 05:05:29 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Lee",
"Hyung Won",
""
],
[
"Kim",
"Kyoung Yee",
""
],
[
"Myung",
"Yun Soo",
""
]
] | We reexamine the massive graviton dark matter scenario (MGCDM) which was recently considered as an alternative to dark energy models. When introducing the native and effective equations of state (EoS), it is shown that there is no phantom phase in the evolution toward the far past. Also we show that the past accelerati... |
1309.3183 | Jorma Louko | Jorma Louko, Samuel P. Philpott, Matthew D. Waller | Singularity resolution by lattice shifts in discretised quantum
mechanics | 16 pages, 2 figures. v2: presentational clarifications. Published
version | Phys. Rev. D 89, 044032 (2014) | 10.1103/PhysRevD.89.044032 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the robustness of singularity avoidance mechanisms in
nonrelativistic quantum mechanics on the discretised real line when lattice
points are allowed to approach a singularity of the classical potential. We
consider the attractive Coulomb potential and the attractive scale invariant
potential, on an equ... | [
{
"created": "Thu, 12 Sep 2013 15:04:06 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Mar 2014 10:08:12 GMT",
"version": "v2"
}
] | 2014-03-05 | [
[
"Louko",
"Jorma",
""
],
[
"Philpott",
"Samuel P.",
""
],
[
"Waller",
"Matthew D.",
""
]
] | We investigate the robustness of singularity avoidance mechanisms in nonrelativistic quantum mechanics on the discretised real line when lattice points are allowed to approach a singularity of the classical potential. We consider the attractive Coulomb potential and the attractive scale invariant potential, on an equis... |
2202.02486 | Alexander S. Glasser | Eugene Kur and Alexander S. Glasser | Discrete Gravity with Local Lorentz Invariance | null | null | 10.1103/PhysRevD.106.064001 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | A novel structure-preserving algorithm for general relativity in vacuum is
derived from a lattice gauge theoretic discretization of the tetradic Palatini
action. The resulting model of discrete gravity is demonstrated to preserve
local Lorentz invariance and symplectic structure.
| [
{
"created": "Sat, 5 Feb 2022 04:12:18 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Aug 2022 19:06:44 GMT",
"version": "v2"
}
] | 2022-09-14 | [
[
"Kur",
"Eugene",
""
],
[
"Glasser",
"Alexander S.",
""
]
] | A novel structure-preserving algorithm for general relativity in vacuum is derived from a lattice gauge theoretic discretization of the tetradic Palatini action. The resulting model of discrete gravity is demonstrated to preserve local Lorentz invariance and symplectic structure. |
0707.3314 | Yun Soo Myung | Yun Soo Myung, Yong-Wan Kim, Young-Jai Park | Thermodynamic duality between RN black hole and 2D dilaton gravity | 10 pages, 3 figures, version accepted by MPLA | Mod.Phys.Lett.A23:91-98,2008 | 10.1142/S021773230802625X | null | gr-qc hep-th | null | All thermodynamic quantities of the Reissner-Nordstr\"om (RN) black hole can
be obtained from the dilaton and its potential of two dimensional (2D) dilaton
gravity. The dual relations of four thermodynamic laws are also established.
Furthermore, the near-horizon thermodynamics of the extremal RN black hole is
complet... | [
{
"created": "Mon, 23 Jul 2007 06:03:57 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Dec 2007 10:55:23 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Myung",
"Yun Soo",
""
],
[
"Kim",
"Yong-Wan",
""
],
[
"Park",
"Young-Jai",
""
]
] | All thermodynamic quantities of the Reissner-Nordstr\"om (RN) black hole can be obtained from the dilaton and its potential of two dimensional (2D) dilaton gravity. The dual relations of four thermodynamic laws are also established. Furthermore, the near-horizon thermodynamics of the extremal RN black hole is completel... |
1606.06918 | Mohammed Lagraa | Meriem Hadjer Lagraa, Mohammed Lagraa and Nabila Touhami | On the Hamiltonian formalism of the tetrad-gravity | 33 pages, Updated version to match with the published version in
Class. Quant. Grav | 2017, Class. Quant. Grav. 34 115010 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a detailed analysis of the Hamiltonian constraints of the
d-dimensional tetrad-connection gravity where the non-dynamical part of the
spatial connection is fixed to zero by an adequate guage transformation. This
new action depending on the co-tetrad and the dynamical part of the spatial
connection leads to... | [
{
"created": "Wed, 22 Jun 2016 11:57:47 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Sep 2016 09:37:04 GMT",
"version": "v2"
},
{
"created": "Mon, 22 May 2017 15:33:03 GMT",
"version": "v3"
}
] | 2017-05-26 | [
[
"Lagraa",
"Meriem Hadjer",
""
],
[
"Lagraa",
"Mohammed",
""
],
[
"Touhami",
"Nabila",
""
]
] | We present a detailed analysis of the Hamiltonian constraints of the d-dimensional tetrad-connection gravity where the non-dynamical part of the spatial connection is fixed to zero by an adequate guage transformation. This new action depending on the co-tetrad and the dynamical part of the spatial connection leads to L... |
gr-qc/9810029 | Matt Visser | David Hochberg (LAEFF), Carmen Molina-Paris (Los Alamos), Matt Visser
(Washington University) | Tolman wormholes violate the strong energy condition | 8 pages, ReV-TeX 3.1 | Phys.Rev. D59 (1999) 044011 | 10.1103/PhysRevD.59.044011 | null | gr-qc | null | For an arbitrary Tolman wormhole, unconstrained by symmetry, we shall define
the bounce in terms of a three-dimensional edgeless achronal spacelike
hypersurface of minimal volume. (Zero trace for the extrinsic curvature plus a
"flare-out" condition.) This enables us to severely constrain the geometry of
spacetime at ... | [
{
"created": "Thu, 8 Oct 1998 07:13:20 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Hochberg",
"David",
"",
"LAEFF"
],
[
"Molina-Paris",
"Carmen",
"",
"Los Alamos"
],
[
"Visser",
"Matt",
"",
"Washington University"
]
] | For an arbitrary Tolman wormhole, unconstrained by symmetry, we shall define the bounce in terms of a three-dimensional edgeless achronal spacelike hypersurface of minimal volume. (Zero trace for the extrinsic curvature plus a "flare-out" condition.) This enables us to severely constrain the geometry of spacetime at an... |
1604.07092 | Celio Muniz | V. B. Bezerra, M. S. Cunha, C. R. Muniz, M. O. Tahim, and H. S. Vieira | Variations in the fine structure constant constraining gravity theories | Revised version. New title. References added. 16 pages, no figures.
To appear in Europhysics Letters. arXiv admin note: text overlap with
arXiv:1510.06655 | EPL 115, 40004 (2016) | 10.1209/0295-5075/115/40004 | null | gr-qc astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate how the fine structure constant, $\alpha$,
locally varies in the presence of a static and spherically symmetric
gravitational source. The procedure consists in calculating the solution and
the energy eigenvalues of a massive scalar field around that source,
considering the weak-field reg... | [
{
"created": "Sun, 24 Apr 2016 23:00:30 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Sep 2016 01:16:22 GMT",
"version": "v2"
}
] | 2016-09-27 | [
[
"Bezerra",
"V. B.",
""
],
[
"Cunha",
"M. S.",
""
],
[
"Muniz",
"C. R.",
""
],
[
"Tahim",
"M. O.",
""
],
[
"Vieira",
"H. S.",
""
]
] | In this paper, we investigate how the fine structure constant, $\alpha$, locally varies in the presence of a static and spherically symmetric gravitational source. The procedure consists in calculating the solution and the energy eigenvalues of a massive scalar field around that source, considering the weak-field regim... |
1003.4248 | Alfredo Lopez Ortega | A. Lopez-Ortega | Area spectrum of the d-dimensional Reissner-Nordstrom black hole in the
small charge limit | 11 pages | Class. Quantum Grav. 28 (2011) 035009 | 10.1088/0264-9381/28/3/035009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A conjecture by Hod states that for the black hole horizon the spacing of its
area spectrum is determined by the asymptotic value of its quasinormal
frequencies. Recently to overcome some difficulties, Maggiore proposes some
changes to the original Hod's conjecture. Taking into account the modifications
proposed by M... | [
{
"created": "Mon, 22 Mar 2010 19:30:21 GMT",
"version": "v1"
},
{
"created": "Sun, 23 Jan 2011 01:19:25 GMT",
"version": "v2"
}
] | 2011-01-25 | [
[
"Lopez-Ortega",
"A.",
""
]
] | A conjecture by Hod states that for the black hole horizon the spacing of its area spectrum is determined by the asymptotic value of its quasinormal frequencies. Recently to overcome some difficulties, Maggiore proposes some changes to the original Hod's conjecture. Taking into account the modifications proposed by Mag... |
1809.11018 | Natalia Alkofer | Natalia Alkofer | Renormalisation Group for Gravity and Dimensional Reduction | Master Thesis, Feb. 2013, U. Graz; 94 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The functional renormalisation group for the Einstein-Hilbert action is
investigated for the case of four infinite (or large) and one compact
dimension. The motivation for this study is given by the suggestion that
gravity in more than four dimensions might be able to solve the so-called
hierarchy problem of the Stan... | [
{
"created": "Sun, 23 Sep 2018 13:20:02 GMT",
"version": "v1"
}
] | 2018-10-01 | [
[
"Alkofer",
"Natalia",
""
]
] | The functional renormalisation group for the Einstein-Hilbert action is investigated for the case of four infinite (or large) and one compact dimension. The motivation for this study is given by the suggestion that gravity in more than four dimensions might be able to solve the so-called hierarchy problem of the Standa... |
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