id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0502014 | Gerard Clement | G. Clement, D.V. Gal'tsov and P.S. Letelier | The Letelier-Gal'tsov spacetime revisited | 3 pages | null | null | LAPTH-1087/05, DTP-MSU/05-02 | gr-qc astro-ph | null | Contrary to a recent claim by Anderson ["The Mathematical Theory of Cosmic
Strings", I.O.P. Publishing, Bristol 2003], we show that the Letelier-Gal'tsov
metric does represent a system of crossed straight infinite cosmic strings
moving with arbitrary constant velocities.
| [
{
"created": "Thu, 3 Feb 2005 14:05:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Clement",
"G.",
""
],
[
"Gal'tsov",
"D. V.",
""
],
[
"Letelier",
"P. S.",
""
]
] | Contrary to a recent claim by Anderson ["The Mathematical Theory of Cosmic Strings", I.O.P. Publishing, Bristol 2003], we show that the Letelier-Gal'tsov metric does represent a system of crossed straight infinite cosmic strings moving with arbitrary constant velocities. |
1308.1433 | Majd Abdelqader | Majd Abdelqader, Kayll Lake | Visualizing Spacetime Curvature via Gradient Flows III: The Kerr Metric
and the Transitional Values of the Spin Parameter | 5 pages, 3 figures, twocolumn revtex 4-1. One figure updated. Final
form to appear in Phys Rev D | Phys Re D 88, 064042 2013 | 10.1103/PhysRevD.88.064042 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Kerr metric is one of the most important solutions to Einstein's field
equations, describing the gravitational field outside a rotating black hole. We
thoroughly analyze the curvature scalar invariants to study the Kerr spacetime
by examining and visualizing their covariant gradient fields. We discover that
the p... | [
{
"created": "Tue, 6 Aug 2013 22:34:29 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Sep 2013 19:54:30 GMT",
"version": "v2"
}
] | 2013-10-10 | [
[
"Abdelqader",
"Majd",
""
],
[
"Lake",
"Kayll",
""
]
] | The Kerr metric is one of the most important solutions to Einstein's field equations, describing the gravitational field outside a rotating black hole. We thoroughly analyze the curvature scalar invariants to study the Kerr spacetime by examining and visualizing their covariant gradient fields. We discover that the par... |
2310.06798 | Martin Bojowald | Martin Bojowald and Erick I. Duque | Emergent modified gravity: Covariance regained | 50 pages | Phys. Rev. D 108 (2023) 084066 | 10.1103/PhysRevD.108.084066 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In its canonical formulation, general relativity is subject to gauge
transformations that are equivalent to space-time coordinate changes of general
covariance only when the gauge generators, given by the Hamiltonian and
diffeomorphism constraints, vanish. Since the specific form taken by Poisson
brackets of the cons... | [
{
"created": "Tue, 10 Oct 2023 17:09:24 GMT",
"version": "v1"
}
] | 2023-10-31 | [
[
"Bojowald",
"Martin",
""
],
[
"Duque",
"Erick I.",
""
]
] | In its canonical formulation, general relativity is subject to gauge transformations that are equivalent to space-time coordinate changes of general covariance only when the gauge generators, given by the Hamiltonian and diffeomorphism constraints, vanish. Since the specific form taken by Poisson brackets of the constr... |
0705.4043 | Gilles Esposito-Farese | Jean-Philippe Bruneton and Gilles Esposito-Farese | Field-theoretical formulations of MOND-like gravity | 66 pages, 6 figures, RevTeX4 format, version reflecting the changes
in the published paper | Phys.Rev.D76:124012,2007; Erratum-ibid.D76:129902,2007 | 10.1103/PhysRevD.76.124012 10.1103/PhysRevD.76.129902 | null | gr-qc | null | Modified Newtonian dynamics (MOND) is a possible way to explain the flat
galaxy rotation curves without invoking the existence of dark matter. It is
however quite difficult to predict such a phenomenology in a consistent field
theory, free of instabilities and admitting a well-posed Cauchy problem. We
examine critica... | [
{
"created": "Mon, 28 May 2007 13:28:31 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Nov 2007 16:35:14 GMT",
"version": "v2"
}
] | 2014-11-18 | [
[
"Bruneton",
"Jean-Philippe",
""
],
[
"Esposito-Farese",
"Gilles",
""
]
] | Modified Newtonian dynamics (MOND) is a possible way to explain the flat galaxy rotation curves without invoking the existence of dark matter. It is however quite difficult to predict such a phenomenology in a consistent field theory, free of instabilities and admitting a well-posed Cauchy problem. We examine criticall... |
gr-qc/0411052 | Jerzy Kocinski | J. Kocinski | Quantization of the Classical Maxwell-Nordstrom Fields | 13 pages | null | null | null | gr-qc | null | The classical electromagnetic and gravitomagnetic fields in the vacuum, in
(3+2) dimensions, described by the Maxwell-Nordstrom equations, are quantized.
These equations are rederived from the field tensor which follows from a
five-dimensional form of the Dirac equation. The electromagnetic field depends
on the custo... | [
{
"created": "Wed, 10 Nov 2004 13:51:23 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kocinski",
"J.",
""
]
] | The classical electromagnetic and gravitomagnetic fields in the vacuum, in (3+2) dimensions, described by the Maxwell-Nordstrom equations, are quantized. These equations are rederived from the field tensor which follows from a five-dimensional form of the Dirac equation. The electromagnetic field depends on the customa... |
1510.05273 | Ehud Eilon | Ehud Eilon and Amos Ori | Adaptive gauge method for long-time double-null simulations of spherical
black-hole spacetimes | 38 pages, 18 figures. Added References | Phys. Rev. D 93, 024016 (2016) | 10.1103/PhysRevD.93.024016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Double-null coordinates are highly useful in numerical simulations of
dynamical spherically-symmetric black holes (BHs). However, they become
problematic in long-time simulations: Along the event horizon, the truncation
error grows exponentially in the outgoing Eddington null coordinate - which we
denote $v_e$ - and ... | [
{
"created": "Sun, 18 Oct 2015 16:20:26 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Oct 2015 12:26:33 GMT",
"version": "v2"
}
] | 2016-01-20 | [
[
"Eilon",
"Ehud",
""
],
[
"Ori",
"Amos",
""
]
] | Double-null coordinates are highly useful in numerical simulations of dynamical spherically-symmetric black holes (BHs). However, they become problematic in long-time simulations: Along the event horizon, the truncation error grows exponentially in the outgoing Eddington null coordinate - which we denote $v_e$ - and ru... |
gr-qc/0409028 | Francesco Nicol\`o FN | Giulio Caciotta, Francesco Nicol\`o | Global characteristic problem for Einstein vacuum equations with small
initial data: (I) The initial data constraints | 77 pages, no figures; corrected misprints and minor errors, to appear
on Journal of Hyperbolic Differential Equations (JHDE) | null | null | null | gr-qc | null | We show how to prescribe the initial data of a characteristic problem
satisfying the costraints, the smallness, the regularity and the asymptotic
decay suitable to prove a global existence result. In this paper, the first of
two, we show in detail the construction of the initial data and give a sketch
of the existenc... | [
{
"created": "Mon, 6 Sep 2004 22:23:16 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Oct 2004 22:31:25 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Caciotta",
"Giulio",
""
],
[
"Nicolò",
"Francesco",
""
]
] | We show how to prescribe the initial data of a characteristic problem satisfying the costraints, the smallness, the regularity and the asymptotic decay suitable to prove a global existence result. In this paper, the first of two, we show in detail the construction of the initial data and give a sketch of the existence ... |
2404.17267 | Salvatore Capozziello | Salvatore Capozziello, Silvia De Bianchi, and Emmanuele Battista | Avoiding singularities in Lorentzian-Euclidean black holes: the role of
atemporality | 22 pages, 5 figures, accepted for publication in Phys. Rev. D | null | 10.1103/PhysRevD.109.104060 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate a Schwarzschild metric exhibiting a signature change across
the event horizon, which gives rise to what we term a Lorentzian-Euclidean
black hole. The resulting geometry is regularized by employing the Hadamard
partie finie technique, which allows us to prove that the metric represents a
solution of va... | [
{
"created": "Fri, 26 Apr 2024 09:14:45 GMT",
"version": "v1"
}
] | 2024-05-21 | [
[
"Capozziello",
"Salvatore",
""
],
[
"De Bianchi",
"Silvia",
""
],
[
"Battista",
"Emmanuele",
""
]
] | We investigate a Schwarzschild metric exhibiting a signature change across the event horizon, which gives rise to what we term a Lorentzian-Euclidean black hole. The resulting geometry is regularized by employing the Hadamard partie finie technique, which allows us to prove that the metric represents a solution of vacu... |
gr-qc/0406120 | Sigbjorn Hervik | Alan A. Coley and Sigbjorn Hervik | Bianchi Cosmologies: A Tale of Two Tilted fluids | 16 pages, 1 figure, to appear in CQG | Class.Quant.Grav. 21 (2004) 4193-4208 | 10.1088/0264-9381/21/17/009 | null | gr-qc | null | We use a dynamical systems approach to study Bianchi type VI$_0$ cosmological
models containing two tilted $\gamma$-law perfect fluids. The full state space
is 11-dimensional, but the existence of a monotonic function simplifies the
analysis considerably. We restrict attention to a particular, physically
interesting,... | [
{
"created": "Wed, 30 Jun 2004 16:11:48 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Coley",
"Alan A.",
""
],
[
"Hervik",
"Sigbjorn",
""
]
] | We use a dynamical systems approach to study Bianchi type VI$_0$ cosmological models containing two tilted $\gamma$-law perfect fluids. The full state space is 11-dimensional, but the existence of a monotonic function simplifies the analysis considerably. We restrict attention to a particular, physically interesting, i... |
1803.00835 | Pietro Don\`a | Pietro Dona | Infrared divergences in the EPRL-FK Spin Foam model | 22 pages + 4 appendices, 8 figures. v2 match the published version | Class.Quant.Grav. 35 (2018) 17, 175019 | 10.1088/1361-6382/aad38f | IGC-18/2-2 | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide an algorithm to estimate the divergence degree of the Lorentzian
EPRL-FK spin foam amplitudes for arbitrary 2-complexes. We focus on the
"self-energy" and "vertex renormalization" diagrams and find an upper bound
estimate. We argue that our upper bound must be close to the actual value, and
explain what nu... | [
{
"created": "Fri, 2 Mar 2018 13:09:27 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Jul 2018 11:58:50 GMT",
"version": "v2"
}
] | 2024-02-27 | [
[
"Dona",
"Pietro",
""
]
] | We provide an algorithm to estimate the divergence degree of the Lorentzian EPRL-FK spin foam amplitudes for arbitrary 2-complexes. We focus on the "self-energy" and "vertex renormalization" diagrams and find an upper bound estimate. We argue that our upper bound must be close to the actual value, and explain what nume... |
gr-qc/0302038 | Roberto Casadio | G.L. Alberghi, R. Casadio, G.Venturi | Thermodynamics for radiating shells in anti-de Sitter space-time | 9 pages, 2 figures, PLB style | Phys.Lett.B557:7-11,2003 | 10.1016/S0370-2693(03)00185-0 | null | gr-qc astro-ph hep-th | null | A thermodynamical description for the quasi-static collapse of radiating,
self-gravitating spherical shells of matter in anti-de Sitter space-time is
obtained. It is shown that the specific heat at constant area and other
thermodynamical quantities may diverge before a black hole has eventually
formed. This suggests ... | [
{
"created": "Tue, 11 Feb 2003 10:35:50 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Alberghi",
"G. L.",
""
],
[
"Casadio",
"R.",
""
],
[
"Venturi",
"G.",
""
]
] | A thermodynamical description for the quasi-static collapse of radiating, self-gravitating spherical shells of matter in anti-de Sitter space-time is obtained. It is shown that the specific heat at constant area and other thermodynamical quantities may diverge before a black hole has eventually formed. This suggests th... |
1610.07211 | Surena Rahbardehghan | Hamed Pejhan and Surena Rahbardehghan | Covariant and infrared-free graviton two-point function in de Sitter
spacetime II | 14 pages | Phys. Rev. D 94, 104030 (2016) | 10.1103/PhysRevD.94.104030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The solution to the linearized Einstein equation in de Sitter (dS) spacetime
and the corresponding two-point function are explicitly written down in a gauge
with two parameters `$a$' and `$b$'. The quantization procedure, independent of
the choice of the coordinate system, is based on a rigorous group theoretical
app... | [
{
"created": "Sun, 23 Oct 2016 18:36:26 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Nov 2016 10:33:26 GMT",
"version": "v2"
}
] | 2016-12-21 | [
[
"Pejhan",
"Hamed",
""
],
[
"Rahbardehghan",
"Surena",
""
]
] | The solution to the linearized Einstein equation in de Sitter (dS) spacetime and the corresponding two-point function are explicitly written down in a gauge with two parameters `$a$' and `$b$'. The quantization procedure, independent of the choice of the coordinate system, is based on a rigorous group theoretical appro... |
1107.1344 | Jose M. M. Senovilla | Jos\'e M.M. Senovilla | Trapped surfaces | 32 pages, 12 figures, 3 Tables. Invited course at the 2011 Shanghai
Asia-Pacific School and Workshop on Gravitation, version submitted to the
Proceedings. Minor typos corrected | null | 10.1142/S0218271811020354 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I review the definition and types of (closed) trapped surfaces. Surprising
global properties are shown, such as their "clairvoyance" and the possibility
that they enter into flat portions of the spacetime. Several results on the
interplay of trapped surfaces with vector fields and with spatial hypersurfaces
are prese... | [
{
"created": "Thu, 7 Jul 2011 11:09:30 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Sep 2011 14:53:38 GMT",
"version": "v2"
}
] | 2015-05-28 | [
[
"Senovilla",
"José M. M.",
""
]
] | I review the definition and types of (closed) trapped surfaces. Surprising global properties are shown, such as their "clairvoyance" and the possibility that they enter into flat portions of the spacetime. Several results on the interplay of trapped surfaces with vector fields and with spatial hypersurfaces are present... |
1912.00767 | Dr. Sudhaker Upadhyay | Sudhaker Upadhyay, Nadeem-ul-islam and Prince A. Ganai | A modified thermodynamics of rotating and charged BTZ black hole | 20 pages, 14 captioned figures, Accepted for publication in JHAP | JHAP 2 (2022) 25 | 10.22128/JHAP.2021.454.1004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the thermodynamics of a charged and rotating BTZ black holes here.
In particular, we derive expressions for various macroscopic thermal quantities
such as entropy, Hawking temperature, Helmholtz free energy, internal energy,
enthalpy, Gibbs free energy, and specific heat. To study the effects of small
stat... | [
{
"created": "Thu, 28 Nov 2019 11:46:04 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jan 2022 16:48:16 GMT",
"version": "v2"
}
] | 2022-02-01 | [
[
"Upadhyay",
"Sudhaker",
""
],
[
"Nadeem-ul-islam",
"",
""
],
[
"Ganai",
"Prince A.",
""
]
] | We present the thermodynamics of a charged and rotating BTZ black holes here. In particular, we derive expressions for various macroscopic thermal quantities such as entropy, Hawking temperature, Helmholtz free energy, internal energy, enthalpy, Gibbs free energy, and specific heat. To study the effects of small statis... |
gr-qc/0612118 | Valentino Lacquaniti | Valentino Lacquaniti and Giovanni Montani | Hamiltonian formulation of the 5-D Kaluza-Klein model and test-particle
motion | 3 pages, proceedings of the XI Marcel Grossmann meeting on
Relativistic Astrophysics, July 23-29, 2006, Berlin | null | null | null | gr-qc | null | We examine the ADM reformulation of the 5-D KK model: the dimensional
reduction is provided to commute with the ADM splitting and we show how the
time component of the gauge vector is given by combination of the Lagrangian
multipliers for the 5-D gravitational field. We consider 5D particles motion
and after dimensio... | [
{
"created": "Tue, 19 Dec 2006 18:19:07 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lacquaniti",
"Valentino",
""
],
[
"Montani",
"Giovanni",
""
]
] | We examine the ADM reformulation of the 5-D KK model: the dimensional reduction is provided to commute with the ADM splitting and we show how the time component of the gauge vector is given by combination of the Lagrangian multipliers for the 5-D gravitational field. We consider 5D particles motion and after dimensiona... |
1501.04947 | Kristina Giesel | Yu Han, Kristina Giesel, Yongge Ma | Manifestly Gauge Invariant Perturbations of Scalar-Tensor Theories of
Gravity | 40 pages | Class. Quantum Grav. 32 (2015) 135006 | 10.1088/0264-9381/32/13/135006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The general relativistic perturbations of scalar-tensor theories (STT) of
gravity are studied in a manifestly gauge invariant Hamiltonian formalism.
After the derivation of the Hamiltonian equations of motion in this framework,
the gauge invariant formalism is used to compute the evolution equations of
linear perturb... | [
{
"created": "Tue, 20 Jan 2015 20:24:54 GMT",
"version": "v1"
}
] | 2015-06-08 | [
[
"Han",
"Yu",
""
],
[
"Giesel",
"Kristina",
""
],
[
"Ma",
"Yongge",
""
]
] | The general relativistic perturbations of scalar-tensor theories (STT) of gravity are studied in a manifestly gauge invariant Hamiltonian formalism. After the derivation of the Hamiltonian equations of motion in this framework, the gauge invariant formalism is used to compute the evolution equations of linear perturbat... |
1511.03217 | Farhad Darabi | Y. Heydarzade, F. Darabi, K. Atazadeh | Einstein static universe on the brane supported by extended Chaplygin
gas | 30 pages, major revision | Astrophys. Space. Sci 361: 250 (2016) | 10.1007/s10509-016-2836-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the cosmological models in which an extended Chaplygin gas universe
is merged with the braneworld scenario. In particular, we examine the
realization of Einstein static universe on the brane embedded in a non-constant
curvature bulk space and perform a detailed perturbation analysis. We extract
the stability... | [
{
"created": "Tue, 10 Nov 2015 18:32:18 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jul 2016 10:36:29 GMT",
"version": "v2"
}
] | 2016-07-08 | [
[
"Heydarzade",
"Y.",
""
],
[
"Darabi",
"F.",
""
],
[
"Atazadeh",
"K.",
""
]
] | We study the cosmological models in which an extended Chaplygin gas universe is merged with the braneworld scenario. In particular, we examine the realization of Einstein static universe on the brane embedded in a non-constant curvature bulk space and perform a detailed perturbation analysis. We extract the stability c... |
0712.3129 | Paingalil Kunjan Suresh | K.K.Venkataratnam and P.K.Suresh | Density Fluctuations in the Oscillatory Phase of Nonclassical Inflaton
in FRW Universe | 14 pages, 2 figures, To appear in Int.J.Mod.Phys.D | Int.J.Mod.Phys.D17:1991-2005,2008 | 10.1142/S0218271808013662 | null | gr-qc | null | Using coherent and squeezed state formalisms of quantum optics for a
minimally coupled non-classical inflaton in the FRW mertic is studied, in
semiclassical theory of gravity. The leading order solution for the
semiclassical Einstein equations in the coherent, squeezed and squeezed vacuum
states are obtained perturba... | [
{
"created": "Wed, 19 Dec 2007 09:46:23 GMT",
"version": "v1"
}
] | 2009-02-11 | [
[
"Venkataratnam",
"K. K.",
""
],
[
"Suresh",
"P. K.",
""
]
] | Using coherent and squeezed state formalisms of quantum optics for a minimally coupled non-classical inflaton in the FRW mertic is studied, in semiclassical theory of gravity. The leading order solution for the semiclassical Einstein equations in the coherent, squeezed and squeezed vacuum states are obtained perturbati... |
2311.12018 | Jan Scheumann | Jan Scheumann (1 and 4), Dennis Philipp (1 and 4), Sven Herrmann (1
and 4), Eva Hackmann (1 and 4), Benny Rievers (1 and 4), Javier
Ventura-Traveset (2), Luis Mendes (3), Claus L\"ammerzahl (1 and 4) ((1)
Center of Applied Space Technology and Microgravity (ZARM), University of
Bremen, (2) Centre Spatial de Tou... | Gravitomagnetic Clock Effect: Using GALILEO to explore General
Relativity | 13 pages, 3 figures, 3 supplemental pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | All experiments to date are in remarkable agreement with the predictions of
Einstein's theory of gravity, General Relativity. Besides the classical tests,
involving light deflection, orbit precession, signal delay, and the
gravitational redshift, modern technology has pushed the limits even further.
Gravitational wav... | [
{
"created": "Mon, 20 Nov 2023 18:55:26 GMT",
"version": "v1"
}
] | 2023-11-21 | [
[
"Scheumann",
"Jan",
"",
"1 and 4"
],
[
"Philipp",
"Dennis",
"",
"1 and 4"
],
[
"Herrmann",
"Sven",
"",
"1\n and 4"
],
[
"Hackmann",
"Eva",
"",
"1 and 4"
],
[
"Rievers",
"Benny",
"",
"1 and 4"
],
[
"Ventura-Tra... | All experiments to date are in remarkable agreement with the predictions of Einstein's theory of gravity, General Relativity. Besides the classical tests, involving light deflection, orbit precession, signal delay, and the gravitational redshift, modern technology has pushed the limits even further. Gravitational waves... |
2305.06997 | Manuel Hohmann | Manuel Hohmann | Spatially homogeneous teleparallel spacetimes with four-dimensional
groups of motions | 30 pages, no figures; contribution to the Special Issue on
metric-affine gravity, Tartu, 2022, of the International Journal of Geometric
Methods in Modern Physics | Int. J. Geom. Meth. Mod. Phys. 20, Supp. 1 (2023) 2450046 | 10.1142/S0219887824500464 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study metric teleparallel geometries, which can either be defined through
a Lorentzian metric and flat, metric-compatible affine connection, or a tetrad
and a flat spin connection, which are invariant under the transitive action of
a four-dimensional Lie group on their spatial equal-time hypersurfaces. There
are t... | [
{
"created": "Thu, 11 May 2023 17:32:59 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Feb 2024 21:15:02 GMT",
"version": "v2"
}
] | 2024-02-19 | [
[
"Hohmann",
"Manuel",
""
]
] | We study metric teleparallel geometries, which can either be defined through a Lorentzian metric and flat, metric-compatible affine connection, or a tetrad and a flat spin connection, which are invariant under the transitive action of a four-dimensional Lie group on their spatial equal-time hypersurfaces. There are thr... |
0909.0939 | Marcin Kisielowski M.Sc. | Wojciech Kami\'nski, Marcin Kisielowski, Jerzy Lewandowski | Spin-Foams for All Loop Quantum Gravity | RevTex4, 23 pages, 8 figures; important references added; minor
corrections, version published in Class.Quant.Grav; theorem of injectivity of
EPRL map corrected | Class.Quant.Grav.27:095006,2010 | 10.1088/0264-9381/27/9/095006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The simplicial framework of Engle-Pereira-Rovelli-Livine spin-foam models is
generalized to match the diffeomorphism invariant framework of loop quantum
gravity. The simplicial spin-foams are generalized to arbitrary linear 2-cell
spin-foams. The resulting framework admits all the spin-network states of loop
quantum ... | [
{
"created": "Fri, 4 Sep 2009 18:44:44 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Sep 2009 11:44:07 GMT",
"version": "v2"
},
{
"created": "Sat, 20 Mar 2010 21:42:46 GMT",
"version": "v3"
},
{
"created": "Wed, 31 Mar 2010 21:59:52 GMT",
"version": "v4"
},
{
"cr... | 2015-03-13 | [
[
"Kamiński",
"Wojciech",
""
],
[
"Kisielowski",
"Marcin",
""
],
[
"Lewandowski",
"Jerzy",
""
]
] | The simplicial framework of Engle-Pereira-Rovelli-Livine spin-foam models is generalized to match the diffeomorphism invariant framework of loop quantum gravity. The simplicial spin-foams are generalized to arbitrary linear 2-cell spin-foams. The resulting framework admits all the spin-network states of loop quantum gr... |
1503.08455 | Carlos Augusto Romero Filho | A. B. Barreto, T. S. Almeida, C. Romero | Extending the ADM formalism to Weyl geometry | 10 pages | null | 10.1063/1.4913344 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to treat quantum cosmology in the framework of Weyl spacetimes we
take the first step of extending the Arnowitt-Deser-Misner formalism to Weyl
geometry. We then obtain an expression of the curvature tensor in terms of
spatial quantities by splitting spacetime in (3+1)-dimensional form. We next
write the Lagr... | [
{
"created": "Sun, 29 Mar 2015 16:21:14 GMT",
"version": "v1"
}
] | 2015-06-24 | [
[
"Barreto",
"A. B.",
""
],
[
"Almeida",
"T. S.",
""
],
[
"Romero",
"C.",
""
]
] | In order to treat quantum cosmology in the framework of Weyl spacetimes we take the first step of extending the Arnowitt-Deser-Misner formalism to Weyl geometry. We then obtain an expression of the curvature tensor in terms of spatial quantities by splitting spacetime in (3+1)-dimensional form. We next write the Lagran... |
2307.12464 | Pravin Dahal | Pravin Kumar Dahal | Surface gravity from tidal acceleration | 11 pages, 0 figure, Matches Published Version (available at
https://rdcu.be/drBzS); Comments Welcome! | European Physical Journal Plus 138, 1027 (2023) | 10.1140/epjp/s13360-023-04664-0 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | Surface gravity plays a pivotal role in the characterization of black holes
and also in formulating the laws of black hole thermodynamics. Despite its
significance, defining surface gravity in general spacetimes is a nontrivial
task and thus has multiple definitions that lack equivalence in dynamical
scenarios. This ... | [
{
"created": "Mon, 24 Jul 2023 01:20:05 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Nov 2023 04:28:42 GMT",
"version": "v2"
}
] | 2023-11-22 | [
[
"Dahal",
"Pravin Kumar",
""
]
] | Surface gravity plays a pivotal role in the characterization of black holes and also in formulating the laws of black hole thermodynamics. Despite its significance, defining surface gravity in general spacetimes is a nontrivial task and thus has multiple definitions that lack equivalence in dynamical scenarios. This pa... |
0904.4496 | Maria Bedran | M.L.Bedran | The function q(z) as a consistency check for cosmological parameters | 10 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the Friedmann cosmology the deceleration of the expansion q plays a
fundamental role. We derive the deceleration as a function of redshift $q(z)$
in two scenarios: $\Lambda$ CDM model and modified Chaplygin gas (MCG) model,
without assuming spatial flatness. The expression relating the transition
redshift from dec... | [
{
"created": "Tue, 28 Apr 2009 21:38:41 GMT",
"version": "v1"
}
] | 2009-04-30 | [
[
"Bedran",
"M. L.",
""
]
] | In the Friedmann cosmology the deceleration of the expansion q plays a fundamental role. We derive the deceleration as a function of redshift $q(z)$ in two scenarios: $\Lambda$ CDM model and modified Chaplygin gas (MCG) model, without assuming spatial flatness. The expression relating the transition redshift from decel... |
gr-qc/0502030 | Christian Boehmer | Christian G. Boehmer, Piotr Bronowski | A note on dilaton gravity with non-smooth potentials | 10 pages, 1 table; two new references, some typos corrected,
Dedicated to Wolfgang Kummer at the occasion of his Emeritierung | Mod.Phys.Lett. A20 (2005) 1057-1064 | 10.1142/S0217732305017172 | Preprint ESI 1602, TUW-05-03 | gr-qc hep-th | null | Recent interest in brane world models motivates the investigation of generic
first order dilaton gravity actions, with potentials having some
non-smoothness. We consider two different types of \delta-like contributions in
the action and analyse their effects on the solutions. Furthermore a second
source of non-smooth... | [
{
"created": "Tue, 8 Feb 2005 11:39:28 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Feb 2005 09:53:39 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Boehmer",
"Christian G.",
""
],
[
"Bronowski",
"Piotr",
""
]
] | Recent interest in brane world models motivates the investigation of generic first order dilaton gravity actions, with potentials having some non-smoothness. We consider two different types of \delta-like contributions in the action and analyse their effects on the solutions. Furthermore a second source of non-smoothne... |
gr-qc/9912061 | Pascual-Sanchez J.-F. | J.-F. Pascual-S\'anchez (University of Valladolid) | The case for cosmic acceleration: Inhomogeneity versus cosmological
constant | 5 pages, LaTex, to appear in Proceedings of Spanish Relativity
Meeting, ERE 99 | null | null | null | gr-qc astro-ph | null | In this work, I develop an alternative explanation for the acceleration of
the cosmic expansion, which seems to be a result of recent high redshift
Supernova data. In the current interpretation, this cosmic acceleration is
explained by including a positive cosmological constant term (or vacuum
energy), in the standar... | [
{
"created": "Wed, 15 Dec 1999 12:29:14 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pascual-Sánchez",
"J. -F.",
"",
"University of Valladolid"
]
] | In this work, I develop an alternative explanation for the acceleration of the cosmic expansion, which seems to be a result of recent high redshift Supernova data. In the current interpretation, this cosmic acceleration is explained by including a positive cosmological constant term (or vacuum energy), in the standard ... |
gr-qc/0702054 | Wataru Hikida | Katsuhiko Ganz, Wataru Hikida, Hiroyuki Nakano, Norichika Sago and
Takahiro Tanaka | Adiabatic Evolution of three 'Constants' of Motion for Greatly Inclined
Orbits in Kerr spacetime | 26pages, to be published in Progress of Theoretical Physics | Prog.Theor.Phys.117:1041-1066,2007 | 10.1143/PTP.117.1041 | OU-TAP-276, KUNS-2061 | gr-qc | null | General orbits of a particle of small mass $\mu$ around a Kerr black hole of
mass $M$ are characterized by three parameters: the energy, the angular
momentum and the Carter constant. The time-averaged rates of change of the
energy and the angular momentum can be obtained by computing the corresponding
fluxes of gravi... | [
{
"created": "Fri, 9 Feb 2007 01:33:24 GMT",
"version": "v1"
},
{
"created": "Thu, 31 May 2007 11:13:35 GMT",
"version": "v2"
}
] | 2011-08-04 | [
[
"Ganz",
"Katsuhiko",
""
],
[
"Hikida",
"Wataru",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Sago",
"Norichika",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | General orbits of a particle of small mass $\mu$ around a Kerr black hole of mass $M$ are characterized by three parameters: the energy, the angular momentum and the Carter constant. The time-averaged rates of change of the energy and the angular momentum can be obtained by computing the corresponding fluxes of gravita... |
2206.06590 | Apimook Watcharangkool | Nontapat Wanwieng, Narupon Chattrapiban, and Apimook Watcharangkool | The effects of gravitational waves on a hydrogen atom | 8 pages, 1 figure | Classical and Quantum Gravity, 2023 | 10.1088/1361-6382/ad0423 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the influence of gravitational waves on a freely falling
hydrogen atom by analyzing the dynamics of the bound electron described by the
Dirac equation in the curved spacetime of a gravitational wave. From this, we
derive the corresponding Dirac Hamiltonian in the Local Inertial Frame of the
atom, assum... | [
{
"created": "Tue, 14 Jun 2022 04:33:10 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Oct 2023 08:14:55 GMT",
"version": "v2"
}
] | 2023-10-20 | [
[
"Wanwieng",
"Nontapat",
""
],
[
"Chattrapiban",
"Narupon",
""
],
[
"Watcharangkool",
"Apimook",
""
]
] | We investigate the influence of gravitational waves on a freely falling hydrogen atom by analyzing the dynamics of the bound electron described by the Dirac equation in the curved spacetime of a gravitational wave. From this, we derive the corresponding Dirac Hamiltonian in the Local Inertial Frame of the atom, assumin... |
gr-qc/9511007 | null | Sean A. Hayward | Complex lapse, complex action and path integrals | 12 pages, TeX | Phys.Rev. D53 (1996) 5664-5669 | 10.1103/PhysRevD.53.5664 | null | gr-qc | null | Imaginary time is often used in quantum tunnelling calculations. This article
advocates a conceptually sounder alternative: complex lapse. In the ``3+1''
action for the Einstein gravitational field minimally coupled to a Klein-Gordon
field, allowing the lapse function to be complex yields a complex action which
gener... | [
{
"created": "Thu, 2 Nov 1995 07:51:11 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Hayward",
"Sean A.",
""
]
] | Imaginary time is often used in quantum tunnelling calculations. This article advocates a conceptually sounder alternative: complex lapse. In the ``3+1'' action for the Einstein gravitational field minimally coupled to a Klein-Gordon field, allowing the lapse function to be complex yields a complex action which generat... |
1911.08467 | Felipe Falciano | F. T. Falciano and M. L. Pe\~nafiel and Santiago Esteban Perez
Bergliaffa | Entropy bounds and nonlinear electrodynamics | 12 pages, 4 figures, accepted for publication in Phys. Rev. D | Phys. Rev. D 100, 125008 (2019) | 10.1103/PhysRevD.100.125008 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bekenstein's inequality sets a bound on the entropy of a charged macroscopic
body. Such a bound is understood as a universal relation between physical
quantities and fundamental constants of nature that should be valid for any
physical system. We reanalyze the steps that lead to this entropy bound
considering a charg... | [
{
"created": "Tue, 19 Nov 2019 18:51:42 GMT",
"version": "v1"
}
] | 2019-12-18 | [
[
"Falciano",
"F. T.",
""
],
[
"Peñafiel",
"M. L.",
""
],
[
"Bergliaffa",
"Santiago Esteban Perez",
""
]
] | Bekenstein's inequality sets a bound on the entropy of a charged macroscopic body. Such a bound is understood as a universal relation between physical quantities and fundamental constants of nature that should be valid for any physical system. We reanalyze the steps that lead to this entropy bound considering a charged... |
1606.05146 | Nicolas Sanchis-Gual | Nicolas Sanchis-Gual, Juan Carlos Degollado, Paula Izquierdo, Jos\'e
A. Font, Pedro J. Montero | Quasistationary solutions of scalar fields around accreting black holes | null | Phys. Rev. D 94, 043004 (2016) | 10.1103/PhysRevD.94.043004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Massive scalar fields can form long-lived configurations around black holes.
These configurations, dubbed quasi-bound states, have been studied both in the
linear and nonlinear regimes. In this paper we show that quasi-bound states can
form in a dynamical scenario in which the mass of the black hole grows
significant... | [
{
"created": "Thu, 16 Jun 2016 11:23:58 GMT",
"version": "v1"
}
] | 2016-08-17 | [
[
"Sanchis-Gual",
"Nicolas",
""
],
[
"Degollado",
"Juan Carlos",
""
],
[
"Izquierdo",
"Paula",
""
],
[
"Font",
"José A.",
""
],
[
"Montero",
"Pedro J.",
""
]
] | Massive scalar fields can form long-lived configurations around black holes. These configurations, dubbed quasi-bound states, have been studied both in the linear and nonlinear regimes. In this paper we show that quasi-bound states can form in a dynamical scenario in which the mass of the black hole grows significantly... |
2205.09311 | Yen Chin Ong | Sofia Di Gennaro, Yen Chin Ong | Sign Switching Dark Energy from a Running Barrow Entropy | null | Universe 2022, 8(10), 541 | 10.3390/universe8100541 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Barrow proposed that the area law of the entropy associated with a horizon
might receive a "fractal correction" due to quantum gravitational effects -- in
place of $S\propto A$, we have instead $S\propto A^{1+\delta/2}$, where
$0\leqslant \delta \leqslant 1$ measures the deviation from the standard area
law ($\delta=... | [
{
"created": "Thu, 19 May 2022 03:50:54 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Oct 2022 06:37:58 GMT",
"version": "v2"
}
] | 2022-10-25 | [
[
"Di Gennaro",
"Sofia",
""
],
[
"Ong",
"Yen Chin",
""
]
] | Barrow proposed that the area law of the entropy associated with a horizon might receive a "fractal correction" due to quantum gravitational effects -- in place of $S\propto A$, we have instead $S\propto A^{1+\delta/2}$, where $0\leqslant \delta \leqslant 1$ measures the deviation from the standard area law ($\delta=0$... |
gr-qc/9611053 | Yongsung Yoon | C.J. Park and Yongsung Yoon | Conformal Couplings in Induced Gravity | 10 pages, Revtex3.0, to appear in General Relativity and Gravitation | Gen.Rel.Grav. 29 (1997) 765-772 | 10.1023/A:1018838006753 | HYUPT 0825/96 | gr-qc | null | It is found that the induced gravity with conformal couplings requires the
conformal invariance in both classical and quantum levels for consistency. This
is also true for the induced gravity with an extended conformal coupling
interacting with torsion.
| [
{
"created": "Fri, 22 Nov 1996 09:22:49 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Park",
"C. J.",
""
],
[
"Yoon",
"Yongsung",
""
]
] | It is found that the induced gravity with conformal couplings requires the conformal invariance in both classical and quantum levels for consistency. This is also true for the induced gravity with an extended conformal coupling interacting with torsion. |
1902.09665 | Cosimo Bambi | Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Thomas Dauser,
Javier A. Garcia, Sourabh Nampalliwar | Public Release of RELXILL_NK: A Relativistic Reflection Model for
Testing Einstein's Gravity | 15 pages, 8 figures. v2: refereed version. Code and documentation
available at
http://www.physics.fudan.edu.cn/tps/people/bambi/Site/RELXILL_NK.html and at
http://www.tat.physik.uni-tuebingen.de/~nampalliwar/relxill_nk/ | Astrophys.J. 878: 91 (2019) | 10.3847/1538-4357/ab1f89 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the public release version of relxill_nk, an X-ray reflection
model for testing the Kerr hypothesis and general relativity. This model
extends the relxill model that assumes the black hole spacetime is described by
the Kerr metric. We also present relxilllp_nk, the first non-Kerr X-ray
reflection model wit... | [
{
"created": "Mon, 25 Feb 2019 23:53:38 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jun 2019 14:46:26 GMT",
"version": "v2"
}
] | 2019-06-19 | [
[
"Abdikamalov",
"Askar B.",
""
],
[
"Ayzenberg",
"Dimitry",
""
],
[
"Bambi",
"Cosimo",
""
],
[
"Dauser",
"Thomas",
""
],
[
"Garcia",
"Javier A.",
""
],
[
"Nampalliwar",
"Sourabh",
""
]
] | We present the public release version of relxill_nk, an X-ray reflection model for testing the Kerr hypothesis and general relativity. This model extends the relxill model that assumes the black hole spacetime is described by the Kerr metric. We also present relxilllp_nk, the first non-Kerr X-ray reflection model with ... |
2205.08660 | Mahnaz Asghari | Mahnaz Asghari and Ahmad Sheykhi | Observational constraints on the fractal cosmology | 7 pages, 4 figures, accepted for publication in EPJC | Eur. Phys. J. C (2022) 82: 960 | 10.1140/epjc/s10052-022-10927-4 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we explore a fractal model of the universe proposed by
Calcagni [JHEP{\bf03}(2010)120] for a power-counting renormalizable field
theory living in a fractal spacetime. Considering a timelike fractal profile,
we derived field equations in fractal cosmology, in order to explore the
structure formation and... | [
{
"created": "Tue, 17 May 2022 23:14:28 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Oct 2022 13:16:01 GMT",
"version": "v2"
}
] | 2022-11-01 | [
[
"Asghari",
"Mahnaz",
""
],
[
"Sheykhi",
"Ahmad",
""
]
] | In this paper, we explore a fractal model of the universe proposed by Calcagni [JHEP{\bf03}(2010)120] for a power-counting renormalizable field theory living in a fractal spacetime. Considering a timelike fractal profile, we derived field equations in fractal cosmology, in order to explore the structure formation and t... |
2005.13367 | Quentin Henry | Quentin Henry, Guillaume Faye, Luc Blanchet | Tidal effects in the gravitational-wave phase evolution of compact
binary systems to next-to-next-to-leading post-Newtonian order | 26 pages. A typo has been corrected in Eq. (5.4a) in the latest
version | Phys. Rev. D 102, 044033 (2020) | 10.1103/PhysRevD.102.044033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the gravitational-wave (GW) energy flux up to the
next-to-next-to-leading (NNL) order of tidal effects in a spinless compact
binary system on quasi-circular orbits. Starting from an effective matter
action, we obtain the stress-energy tensor of the system, which we use in a GW
generation formalism based on... | [
{
"created": "Wed, 27 May 2020 13:56:52 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Oct 2020 18:44:05 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Sep 2023 15:17:54 GMT",
"version": "v3"
}
] | 2023-09-26 | [
[
"Henry",
"Quentin",
""
],
[
"Faye",
"Guillaume",
""
],
[
"Blanchet",
"Luc",
""
]
] | We compute the gravitational-wave (GW) energy flux up to the next-to-next-to-leading (NNL) order of tidal effects in a spinless compact binary system on quasi-circular orbits. Starting from an effective matter action, we obtain the stress-energy tensor of the system, which we use in a GW generation formalism based on m... |
2307.16841 | Prashant Kocherlakota | Prashant Kocherlakota, Luciano Rezzolla, Rittick Roy, and Maciek
Wielgus | Prospects for Future Experimental Tests of Gravity with Black Hole
Imaging: Spherical Symmetry | 12 pages, 3 figures. To appear in PRD | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Astrophysical black holes (BHs) are universally expected to be described by
the Kerr metric, a stationary, vacuum solution of general relativity (GR).
Indeed, by imaging M87$^\star$ and Sgr A$^\star$ and measuring the size of
their shadows, we have substantiated this hypothesis through successful null
tests. Here we ... | [
{
"created": "Mon, 31 Jul 2023 17:03:48 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Mar 2024 00:52:30 GMT",
"version": "v2"
}
] | 2024-03-07 | [
[
"Kocherlakota",
"Prashant",
""
],
[
"Rezzolla",
"Luciano",
""
],
[
"Roy",
"Rittick",
""
],
[
"Wielgus",
"Maciek",
""
]
] | Astrophysical black holes (BHs) are universally expected to be described by the Kerr metric, a stationary, vacuum solution of general relativity (GR). Indeed, by imaging M87$^\star$ and Sgr A$^\star$ and measuring the size of their shadows, we have substantiated this hypothesis through successful null tests. Here we di... |
2002.09729 | Bogeun Gwak | Bogeun Gwak | Thermodynamics in Rotating Anti-de Sitter Black Holes with Massive
Scalar Field in Three Dimensions | 13 pages, 9 figures | Chin. Phys. C 44 (2020) 12, 125106 | 10.1088/1674-1137/abb656 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the tendency in variations of the dual CFT$_2$ when a rotating
AdS$_3$ black hole changes by fluxes transferred by the scattering of a massive
scalar field according to the AdS/CFT correspondence. The conserved quantities
of the black hole are definitely constrained by the extremal condition.
Moreover,... | [
{
"created": "Sat, 22 Feb 2020 16:42:50 GMT",
"version": "v1"
}
] | 2020-12-01 | [
[
"Gwak",
"Bogeun",
""
]
] | We investigate the tendency in variations of the dual CFT$_2$ when a rotating AdS$_3$ black hole changes by fluxes transferred by the scattering of a massive scalar field according to the AdS/CFT correspondence. The conserved quantities of the black hole are definitely constrained by the extremal condition. Moreover, t... |
gr-qc/0510032 | Chongming Xu | Chongming Xu, Xuejun Wu and Erwin Bruening | General Formula for Comparison of Clock Rates -- Applications to Cosmos
and Solar System | 17 pages. CQG submitted | Class.Quant.Grav. 22 (2005) 5015-5028 | 10.1088/0264-9381/22/23/007 | null | gr-qc | null | In this paper we deduce a quite general formula which allows the relation of
clock rates at two different space time points to be discussed. In the case of
a perturbed Robertson-Walker metric, our analysis leads to an equation for the
comparison of clock rates at different cosmic space time points, which includes
the... | [
{
"created": "Sat, 8 Oct 2005 01:54:11 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Xu",
"Chongming",
""
],
[
"Wu",
"Xuejun",
""
],
[
"Bruening",
"Erwin",
""
]
] | In this paper we deduce a quite general formula which allows the relation of clock rates at two different space time points to be discussed. In the case of a perturbed Robertson-Walker metric, our analysis leads to an equation for the comparison of clock rates at different cosmic space time points, which includes the H... |
0906.0181 | Kamal Nandi | K. K. Nandi, B. Bhattacharjee, S. M. K. Alam and J. Evans | Brans-Dicke wormholes in the Jordan and Einstein frames | Minor errors corrected, uploaded for the benefit of the researchers | Phys.Rev.D57:823-828,1998 | 10.1103/PhysRevD.57.823 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the possibility of static wormhole solutions in the vacuum
Brans-Dicke theory both in the original (Jordan) frame and in the conformally
rescaled (Einstein) frame. It turns out that, in the former frame, wormholes
exist only in a very narrow interval of the coupling parameter, viz.,
-3/2<omega<-4/3. It is ... | [
{
"created": "Sun, 31 May 2009 19:25:29 GMT",
"version": "v1"
}
] | 2009-06-30 | [
[
"Nandi",
"K. K.",
""
],
[
"Bhattacharjee",
"B.",
""
],
[
"Alam",
"S. M. K.",
""
],
[
"Evans",
"J.",
""
]
] | We examine the possibility of static wormhole solutions in the vacuum Brans-Dicke theory both in the original (Jordan) frame and in the conformally rescaled (Einstein) frame. It turns out that, in the former frame, wormholes exist only in a very narrow interval of the coupling parameter, viz., -3/2<omega<-4/3. It is sh... |
1406.6104 | Todd Oliynyk | Todd A. Oliynyk | The Newtonian limit on cosmological scales | This version agrees with the published one | Commun. Math. Phys. 339 (2015), 455-512 | 10.1007/s00220-015-2418-5 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish the existence of a wide class of inhomogeneous relativistic
solutions to the Einstein-Euler equations that are well approximated on
cosmological scales by solutions of Newtonian gravity. Error estimates
measuring the difference between the Newtonian and relativistic solutions are
provided.
| [
{
"created": "Mon, 23 Jun 2014 23:00:08 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Feb 2015 23:11:52 GMT",
"version": "v2"
},
{
"created": "Sun, 26 Jul 2015 10:24:08 GMT",
"version": "v3"
}
] | 2015-07-28 | [
[
"Oliynyk",
"Todd A.",
""
]
] | We establish the existence of a wide class of inhomogeneous relativistic solutions to the Einstein-Euler equations that are well approximated on cosmological scales by solutions of Newtonian gravity. Error estimates measuring the difference between the Newtonian and relativistic solutions are provided. |
gr-qc/0408045 | Ioannis Raptis | Ioannis Raptis | Finitary-Algebraic `Resolution' of the Inner Schwarzschild Singularity | 41 pages, to appear in the International Journal of Theoretical
Physics | Int.J.Theor.Phys. 45 (2006) 79-128 | null | null | gr-qc | null | A `resolution' of the interior singularity of the spherically symmetric
Schwarzschild solution of the Einstein equations for the gravitational field of
a point-particle is carried out entirely and solely by finitistic and algebraic
means. To this end, the background differential spacetime manifold and
Calculus-free p... | [
{
"created": "Mon, 16 Aug 2004 14:03:08 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Aug 2004 09:55:48 GMT",
"version": "v2"
},
{
"created": "Fri, 20 Aug 2004 10:37:22 GMT",
"version": "v3"
},
{
"created": "Tue, 24 Aug 2004 15:36:51 GMT",
"version": "v4"
},
{
"c... | 2007-05-23 | [
[
"Raptis",
"Ioannis",
""
]
] | A `resolution' of the interior singularity of the spherically symmetric Schwarzschild solution of the Einstein equations for the gravitational field of a point-particle is carried out entirely and solely by finitistic and algebraic means. To this end, the background differential spacetime manifold and Calculus-free pur... |
1001.2814 | A. Tawfik | A. Tawfik (ECTP & Mti U.), M. Wahba (ECTP & Mti U.), H. Mansour (Cairo
U.) and T. Harko (Hong Kong U.) | Viscous Quark-Gluon Plasma in the Early Universe | 19 pages, 4 figures including 7 eps graphs | Annals Phys.523:194-207,2011 | 10.1002/andp.201000052 | ECTP-2009-05 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the evolution of a flat, isotropic and homogeneous
Friedmann-Robertson-Walker Universe, filled with a causal bulk viscous
cosmological fluid, that can be characterized by an ultra-relativistic equation
of state and bulk viscosity coefficient obtained from recent lattice QCD
calculations. The basic equatio... | [
{
"created": "Sat, 16 Jan 2010 10:37:01 GMT",
"version": "v1"
}
] | 2011-10-05 | [
[
"Tawfik",
"A.",
"",
"ECTP & Mti U."
],
[
"Wahba",
"M.",
"",
"ECTP & Mti U."
],
[
"Mansour",
"H.",
"",
"Cairo\n U."
],
[
"Harko",
"T.",
"",
"Hong Kong U."
]
] | We consider the evolution of a flat, isotropic and homogeneous Friedmann-Robertson-Walker Universe, filled with a causal bulk viscous cosmological fluid, that can be characterized by an ultra-relativistic equation of state and bulk viscosity coefficient obtained from recent lattice QCD calculations. The basic equation ... |
2205.15878 | Josu Aurrekoetxea | Josu C. Aurrekoetxea, Pedro G. Ferreira, Katy Clough, Eugene A. Lim,
Oliver J. Tattersall | Where is the ringdown? Reconstructing quasinormal modes from dispersive
waves | 10 pages, 8 figures. Movies: https://youtu.be/YYBwyAbH5Fk. Matches
version published in PRD | null | 10.1103/PhysRevD.106.104002 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We study the generation and propagation of gravitational waves in
scalar-tensor gravity using numerical relativity simulations of scalar field
collapses beyond spherical symmetry. This allows us to compare the tensor and
additional massive scalar waves that are excited. As shown in previous work in
spherical symmetry... | [
{
"created": "Tue, 31 May 2022 15:26:59 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Nov 2022 14:46:15 GMT",
"version": "v2"
}
] | 2022-11-16 | [
[
"Aurrekoetxea",
"Josu C.",
""
],
[
"Ferreira",
"Pedro G.",
""
],
[
"Clough",
"Katy",
""
],
[
"Lim",
"Eugene A.",
""
],
[
"Tattersall",
"Oliver J.",
""
]
] | We study the generation and propagation of gravitational waves in scalar-tensor gravity using numerical relativity simulations of scalar field collapses beyond spherical symmetry. This allows us to compare the tensor and additional massive scalar waves that are excited. As shown in previous work in spherical symmetry, ... |
2307.11790 | Branislav Cvetkovi\'c | Milutin Blagojevi\'c and Branislav Cvetkovi\'c | On thermodynamics of charged black hole with scalar hair | LaTeX, 10 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that energy, entropy and the first law of the Martinez-Troncoso
black hole with electric charge and scalar hair (2006) can be consistently
described in a general Hamiltonian approach to black hole thermodynamics.
| [
{
"created": "Thu, 20 Jul 2023 20:11:12 GMT",
"version": "v1"
}
] | 2023-07-25 | [
[
"Blagojević",
"Milutin",
""
],
[
"Cvetković",
"Branislav",
""
]
] | It is shown that energy, entropy and the first law of the Martinez-Troncoso black hole with electric charge and scalar hair (2006) can be consistently described in a general Hamiltonian approach to black hole thermodynamics. |
2110.07503 | Keisuke Ota | Keisuke Ota, Shinpei Kobayashi and Keisuke Nakashi | Revisiting timelike geodesics in the Fisher-Janis-Newman-Winicour-Wyman
spacetime | 26 pages, 7 figures | null | 10.1103/PhysRevD.105.024037 | RUP-21-24 | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate the timelike geodesics and the periapsis precession of orbits
in the Fisher-Janis-Newman-Winicour-Wyman spacetime. This spacetime represents
the naked singularity spacetime in the Einstein-massless scalar system. We
revisit the results in the previous studies and relax the assumptions about the
eccentr... | [
{
"created": "Thu, 14 Oct 2021 16:21:43 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jan 2022 14:24:31 GMT",
"version": "v2"
}
] | 2022-01-26 | [
[
"Ota",
"Keisuke",
""
],
[
"Kobayashi",
"Shinpei",
""
],
[
"Nakashi",
"Keisuke",
""
]
] | We investigate the timelike geodesics and the periapsis precession of orbits in the Fisher-Janis-Newman-Winicour-Wyman spacetime. This spacetime represents the naked singularity spacetime in the Einstein-massless scalar system. We revisit the results in the previous studies and relax the assumptions about the eccentric... |
gr-qc/0509040 | Yun Soo Myung | Hungsoo Kim, Hyung Won Lee, Yun Soo Myung | Equation of state for an interacting holographic dark energy model | 11 pages, 2 eps figures, final version to appear in PLB | Phys.Lett. B632 (2006) 605-609 | 10.1016/j.physletb.2005.11.043 | INJE-TP-05-07 | gr-qc astro-ph | null | We investigate a model of the interacting holographic dark energy with cold
dark matter (CDM). If the holographic energy density decays into CDM, we find
two types of the effective equation of state. In this case we have to use the
effective equations of state ($\omega^{\rm eff}_{\rm \Lambda}$) instead of the
equatio... | [
{
"created": "Mon, 12 Sep 2005 17:57:56 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Nov 2005 16:01:14 GMT",
"version": "v2"
}
] | 2010-04-05 | [
[
"Kim",
"Hungsoo",
""
],
[
"Lee",
"Hyung Won",
""
],
[
"Myung",
"Yun Soo",
""
]
] | We investigate a model of the interacting holographic dark energy with cold dark matter (CDM). If the holographic energy density decays into CDM, we find two types of the effective equation of state. In this case we have to use the effective equations of state ($\omega^{\rm eff}_{\rm \Lambda}$) instead of the equation ... |
2105.11958 | Christine Cordula Dantas | Christine C. Dantas (Astrophysics Division, INPE, Brazil) | Expanding and Self-Organizing 2D Universe Models Emerging from Frozen
Trivalent Spin Networks | Revised version addressing comments by the referees: 22 pages, 7
figures, one appendix; conclusions were significantly expanded | null | 10.1088/1361-6382/ac25e1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the topic of self-organized criticality (SOC) in simple
statistical graph models, with the purpose of capturing essential processes
leading to the emergence of macroscopic spacetime from the microscopic dynamics
in loop quantum gravity (LQG). We performed a large set of simulations based on
extensions of t... | [
{
"created": "Tue, 25 May 2021 14:13:36 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Aug 2021 13:49:53 GMT",
"version": "v2"
}
] | 2021-09-14 | [
[
"Dantas",
"Christine C.",
"",
"Astrophysics Division, INPE, Brazil"
]
] | We revisit the topic of self-organized criticality (SOC) in simple statistical graph models, with the purpose of capturing essential processes leading to the emergence of macroscopic spacetime from the microscopic dynamics in loop quantum gravity (LQG). We performed a large set of simulations based on extensions of the... |
1807.05080 | S Habib Mazharimousavi | S. Danial Forghani, S. Habib Mazharimousavi and M. Halilsoy | The Stability of Asymmetric Cylindrical Thin-Shell Wormholes | 11 pages, 4 figures | null | 10.1088/1475-7516/2019/10/067 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In continuation of a preceding work on introducing asymmetric thin-shell
wormholes as an emerging class of traversable wormholes within the context,
this time cylindrically symmetric spacetimes are exploited to construct such
wormholes. Having established a generic formulation, first the Linet-Tian
metric generally, ... | [
{
"created": "Thu, 12 Jul 2018 07:38:28 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Jul 2018 20:49:31 GMT",
"version": "v2"
}
] | 2019-11-06 | [
[
"Forghani",
"S. Danial",
""
],
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
]
] | In continuation of a preceding work on introducing asymmetric thin-shell wormholes as an emerging class of traversable wormholes within the context, this time cylindrically symmetric spacetimes are exploited to construct such wormholes. Having established a generic formulation, first the Linet-Tian metric generally, an... |
gr-qc/9606057 | Steve Liebling | Steven L. Liebling and Matthew W. Choptuik | Black Hole Criticality in the Brans-Dicke Model | 4 pages, REVTeX 3.0, 5 figures included | Phys.Rev.Lett. 77 (1996) 1424-1427 | 10.1103/PhysRevLett.77.1424 | null | gr-qc hep-ph | null | We study the collapse of a free scalar field in the Brans-Dicke model of
gravity. At the critical point of black hole formation, the model admits two
distinctive solutions dependent on the value of the coupling parameter. We find
one solution to be discretely self-similar and the other to exhibit continuous
self-simi... | [
{
"created": "Tue, 18 Jun 1996 19:54:18 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Liebling",
"Steven L.",
""
],
[
"Choptuik",
"Matthew W.",
""
]
] | We study the collapse of a free scalar field in the Brans-Dicke model of gravity. At the critical point of black hole formation, the model admits two distinctive solutions dependent on the value of the coupling parameter. We find one solution to be discretely self-similar and the other to exhibit continuous self-simila... |
gr-qc/9812029 | John Schwarz | John H. Schwarz | From Superstrings to M Theory | 7 pages; To be published in the Proceedings of COSMO-98 | null | 10.1063/1.59438 | CALT-68-2207 | gr-qc | null | In this talk I will survey some of the basic facts about superstring theories
in 10 dimensions and the dualities that relate them to M theory in 11
dimensions. Then I will mention some important unresolved issues.
| [
{
"created": "Tue, 8 Dec 1998 19:35:20 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Schwarz",
"John H.",
""
]
] | In this talk I will survey some of the basic facts about superstring theories in 10 dimensions and the dualities that relate them to M theory in 11 dimensions. Then I will mention some important unresolved issues. |
1306.6758 | Orlando Luongo | Alessandro Bravetti, Orlando Luongo | Dark energy from Geometrothermodynamics | 9 pages; 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Geometrothermodynamics is a geometric theory which combines thermodynamics
with contact and Riemannian geometry. In this work we use the formalism of
geometrothermodynamics to infer cosmological models which predict the observed
speed up. As a relevant consequence, our simple model shows dynamical
properties which se... | [
{
"created": "Fri, 28 Jun 2013 08:58:52 GMT",
"version": "v1"
}
] | 2013-07-01 | [
[
"Bravetti",
"Alessandro",
""
],
[
"Luongo",
"Orlando",
""
]
] | Geometrothermodynamics is a geometric theory which combines thermodynamics with contact and Riemannian geometry. In this work we use the formalism of geometrothermodynamics to infer cosmological models which predict the observed speed up. As a relevant consequence, our simple model shows dynamical properties which seem... |
2109.02880 | Neven Bili\'c | Neven Bili\'c and Hrvoje Nikoli\'c | Analog Schwarzschild black hole from a nonisentropic fluid | 8 pages, minor revision, discussion on previous works expanded,
conclusions expanded, typos corrected, results unchanged | Universe 2021, 7, 413 | null | RBI-ThPhys-2021-33 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study the conditions under which an analog acoustic geometry of a
relativistic fluid in flat spacetime can take the same form as the
Schwarzschild black hole geometry. We find that the speed of sound must
necessarily be equal to the speed of light. Since the speed of the fluid cannot
exceed the speed of light, thi... | [
{
"created": "Tue, 7 Sep 2021 05:43:20 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Oct 2021 09:33:44 GMT",
"version": "v2"
}
] | 2021-11-01 | [
[
"Bilić",
"Neven",
""
],
[
"Nikolić",
"Hrvoje",
""
]
] | We study the conditions under which an analog acoustic geometry of a relativistic fluid in flat spacetime can take the same form as the Schwarzschild black hole geometry. We find that the speed of sound must necessarily be equal to the speed of light. Since the speed of the fluid cannot exceed the speed of light, this ... |
2210.07299 | Tib\'erio Pereira | Tib\'erio Pereira, Riccardo Sturani | Deep learning waveform anomaly detector for numerical relativity
catalogs | 15 pages, 16 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Numerical Relativity has been of fundamental importance for studying compact
binary coalescence dynamics, waveform modelling, and eventually for
gravitational waves observations. As the sensitivity of the detector network
improves, more precise template modelling will be necessary to guarantee a more
accurate estimat... | [
{
"created": "Thu, 13 Oct 2022 18:59:42 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Feb 2024 13:43:57 GMT",
"version": "v2"
}
] | 2024-02-22 | [
[
"Pereira",
"Tibério",
""
],
[
"Sturani",
"Riccardo",
""
]
] | Numerical Relativity has been of fundamental importance for studying compact binary coalescence dynamics, waveform modelling, and eventually for gravitational waves observations. As the sensitivity of the detector network improves, more precise template modelling will be necessary to guarantee a more accurate estimatio... |
0808.1704 | L\'aszl\'o \'A Gergely | L\'aszl\'o \'A. Gergely, Bal\'azs Mik\'oczi | Renormalized 2PN spin contributions to the accumulated orbital phase for
LISA sources | v2: 14 pages, 6 figures, 2 animated gifs; new section on the
comparison of the analytical results with numerical evolution; published
version | Phys.Rev.D79:064023,2009 | 10.1103/PhysRevD.79.064023 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give here a new third post-Newtonisn (3PN) spin-spin contribution (in the
PN parameter $\epsilon $) to the accumulated orbital phase of a compact binary,
arising from the spin-orbit precessional motion of the spins. In the equal mass
case this contribution vanishes, but LISA sources of merging supermassive
binary ... | [
{
"created": "Tue, 12 Aug 2008 18:51:05 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Apr 2009 11:57:52 GMT",
"version": "v2"
}
] | 2009-11-13 | [
[
"Gergely",
"László Á.",
""
],
[
"Mikóczi",
"Balázs",
""
]
] | We give here a new third post-Newtonisn (3PN) spin-spin contribution (in the PN parameter $\epsilon $) to the accumulated orbital phase of a compact binary, arising from the spin-orbit precessional motion of the spins. In the equal mass case this contribution vanishes, but LISA sources of merging supermassive binary bl... |
1501.07605 | Joao G. Rosa | Joao G. Rosa | Testing black hole superradiance with pulsar companions | 5 pages, 3 figures; matches published version in Physics Letters B | Phys. Lett. B 749, 226 (2015) | 10.1016/j.physletb.2015.07.063 | null | gr-qc astro-ph.SR hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the magnetic dipole and gravitational radiation emitted by a
pulsar can undergo superradiant scattering off a spinning black hole companion.
We find that the relative amount of superradiant modes in the radiation depends
on the pulsar's angular position relative to the black hole's equatorial plane.
In p... | [
{
"created": "Thu, 29 Jan 2015 21:00:12 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Aug 2015 09:30:14 GMT",
"version": "v2"
}
] | 2015-08-14 | [
[
"Rosa",
"Joao G.",
""
]
] | We show that the magnetic dipole and gravitational radiation emitted by a pulsar can undergo superradiant scattering off a spinning black hole companion. We find that the relative amount of superradiant modes in the radiation depends on the pulsar's angular position relative to the black hole's equatorial plane. In par... |
gr-qc/0206019 | Luis Herrera | M. F. A. da Silva, L.Herrera, N. O.Santos and A. Z. Wang | Rotating cylindrical shell source for Lewis spacetime | 18 pages Latex, to appear in Class.Quantum Grav | Class.Quant.Grav. 19 (2002) 3809-3820 | 10.1088/0264-9381/19/14/319 | null | gr-qc | null | Rotating thin-shell-like sources for the stationary cylindrically symmetric
vacuum solutions (Lewis) are constructed and studied. It is found, by imposing
the non existence of timelike curves in the exterior of the shell, and that the
source satisfies the weak, dominant and strong energy conditions that the
parameter... | [
{
"created": "Thu, 6 Jun 2002 19:39:38 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"da Silva",
"M. F. A.",
""
],
[
"Herrera",
"L.",
""
],
[
"Santos",
"N. O.",
""
],
[
"Wang",
"A. Z.",
""
]
] | Rotating thin-shell-like sources for the stationary cylindrically symmetric vacuum solutions (Lewis) are constructed and studied. It is found, by imposing the non existence of timelike curves in the exterior of the shell, and that the source satisfies the weak, dominant and strong energy conditions that the parameters,... |
2212.08089 | Pau Beltr\'an Palau | Pau Beltr\'an-Palau, Adri\'an del R\'io and Jos\'e Navarro-Salas | Quantum corrections to the Schwarzschild metric from vacuum polarization | 16 pages, 6 figures | Phys. Rev. D 107, 085023 (2023) | 10.1103/PhysRevD.107.085023 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore static and spherically symmetric solutions of the 4-dimensional
semiclassical Einstein's equations using the quantum vacuum polarization of a
conformal field as a source. These solutions may be of interest for \black{the
study of} exotic, compact objects (ECOs). The full backreaction problem is
addressed b... | [
{
"created": "Thu, 15 Dec 2022 19:02:44 GMT",
"version": "v1"
},
{
"created": "Mon, 15 May 2023 11:13:34 GMT",
"version": "v2"
}
] | 2023-05-16 | [
[
"Beltrán-Palau",
"Pau",
""
],
[
"del Río",
"Adrián",
""
],
[
"Navarro-Salas",
"José",
""
]
] | We explore static and spherically symmetric solutions of the 4-dimensional semiclassical Einstein's equations using the quantum vacuum polarization of a conformal field as a source. These solutions may be of interest for \black{the study of} exotic, compact objects (ECOs). The full backreaction problem is addressed by ... |
0911.5635 | Kostiantyn Ropotenko | Kostiantyn Ropotenko | The quantum of area $\Delta A = 8\pi l_P^{2}$ and a statistical
interpretation of black hole entropy | 12 pages, revtex, no figures; v.3, revised and enlarged; Sec. III
"Quantization of black hole as Landau quantization" added; references added;
conclusions changed in some points | Phys.Rev.D82:044037,2010 | 10.1103/PhysRevD.82.044037 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In contrast to alternative values, the quantum of area $\Delta A = 8\pi
l_P^{2}$ does not follow from the usual statistical interpretation of black
hole entropy; on the contrary, a statistical interpretation follows from it.
This interpretation is based on the two concepts: nonadditivity of black hole
entropy and Lan... | [
{
"created": "Mon, 30 Nov 2009 13:13:55 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Feb 2010 16:04:59 GMT",
"version": "v2"
},
{
"created": "Wed, 30 Jun 2010 15:25:57 GMT",
"version": "v3"
},
{
"created": "Thu, 1 Jul 2010 07:18:47 GMT",
"version": "v4"
}
] | 2014-11-20 | [
[
"Ropotenko",
"Kostiantyn",
""
]
] | In contrast to alternative values, the quantum of area $\Delta A = 8\pi l_P^{2}$ does not follow from the usual statistical interpretation of black hole entropy; on the contrary, a statistical interpretation follows from it. This interpretation is based on the two concepts: nonadditivity of black hole entropy and Landa... |
gr-qc/0702149 | Jorge P\'aramos | O. Bertolami and J. Paramos | A mission to test the Pioneer anomaly: estimating the main systematic
effects | 9 pages, 1 table, 2 figures; based on a talk presented by one of us
(O.B.) at the 2nd. Pioneer Anomaly Group Meeting at the International Space
Science Institute, 19-23 February 2007 | Int.J.Mod.Phys.D16:1611-1623,2007 | 10.1142/S0218271807011000 | null | gr-qc | null | We estimate the main systematic effects relevant in a mission to test and
characterize the Pioneer anomaly through the flight formation concept, by
launching probing spheres from a mother spacecraft and tracking their motion
via laser ranging.
| [
{
"created": "Wed, 28 Feb 2007 18:21:25 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jun 2007 10:56:29 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bertolami",
"O.",
""
],
[
"Paramos",
"J.",
""
]
] | We estimate the main systematic effects relevant in a mission to test and characterize the Pioneer anomaly through the flight formation concept, by launching probing spheres from a mother spacecraft and tracking their motion via laser ranging. |
2310.11041 | Tsutomu Kobayashi | Tsutomu Kobayashi, Takashi Hiramatsu | Weak-field regime of scalar-tensor theories with an instantaneous mode | 12 pages, published version in PRD | null | null | RUP-23-21 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Higher-order scalar-tensor theories having an instantaneous mode do not
develop the Ostrogradsky instability even if a seemingly dangerous mode is
present. Such theories satisfy only partially the degeneracy conditions that
are usually imposed to remove the dangerous mode completely, and are dubbed as
U-DHOST theorie... | [
{
"created": "Tue, 17 Oct 2023 07:14:02 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Mar 2024 06:29:51 GMT",
"version": "v2"
}
] | 2024-03-26 | [
[
"Kobayashi",
"Tsutomu",
""
],
[
"Hiramatsu",
"Takashi",
""
]
] | Higher-order scalar-tensor theories having an instantaneous mode do not develop the Ostrogradsky instability even if a seemingly dangerous mode is present. Such theories satisfy only partially the degeneracy conditions that are usually imposed to remove the dangerous mode completely, and are dubbed as U-DHOST theories.... |
2304.12024 | Hiroki Matsui | Hiroki Matsui | Summing over Non-singular Paths in Quantum Cosmology | 24 pages, references added, published version | Class. Quantum Grav. 41 (2024) 5, 055005 | 10.1088/1361-6382/ad1fc9 | YITP-23-55 | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we provide the DeWitt propagator and its wave function in
quantum cosmology using the path integral formulation of quantum gravity. The
DeWitt boundary condition is introduced as a way to avoid the Big Bang
singularity by positing that the wave function of the universe vanishes near
the Big Bang. Howeve... | [
{
"created": "Mon, 24 Apr 2023 11:48:21 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jan 2024 10:06:50 GMT",
"version": "v2"
}
] | 2024-02-05 | [
[
"Matsui",
"Hiroki",
""
]
] | In this paper we provide the DeWitt propagator and its wave function in quantum cosmology using the path integral formulation of quantum gravity. The DeWitt boundary condition is introduced as a way to avoid the Big Bang singularity by positing that the wave function of the universe vanishes near the Big Bang. However,... |
2203.11143 | Mohamed Benali | A. Belhaj, H. Belmahi, M. Benali, H. El Moumni | Light Deflection Angle by Superentropic Black Holes | latex, 12 pages, 2 figures. Accepted version in IJMPD 2022 | null | 10.1142/S0218271822500547 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by recent works on light deflection and shadow behaviors on AdS
geometries, we investigate the deflection angle of light rays by superentropic
black holes. Taking appropriate approximations, we first obtain the involved
expression. For large values of the impact parameter, we get a specific value
being zero... | [
{
"created": "Mon, 21 Mar 2022 17:23:41 GMT",
"version": "v1"
}
] | 2022-06-29 | [
[
"Belhaj",
"A.",
""
],
[
"Belmahi",
"H.",
""
],
[
"Benali",
"M.",
""
],
[
"Moumni",
"H. El",
""
]
] | Motivated by recent works on light deflection and shadow behaviors on AdS geometries, we investigate the deflection angle of light rays by superentropic black holes. Taking appropriate approximations, we first obtain the involved expression. For large values of the impact parameter, we get a specific value being zero f... |
gr-qc/0501017 | Jose Geraldo Pereira | H. I. Arcos and J. G. Pereira | Torsion Gravity: a Reappraisal | RevTeX, 34 pages. Review article to be published by Int. J. Mod.
Phys. D | Int.J.Mod.Phys. D13 (2004) 2193-2240 | 10.1142/S0218271804006462 | null | gr-qc | null | The role played by torsion in gravitation is critically reviewed. After a
description of the problems and controversies involving the physics of torsion,
a comprehensive presentation of the teleparallel equivalent of general
relativity is made. According to this theory, curvature and torsion are
alternative ways of d... | [
{
"created": "Fri, 7 Jan 2005 12:50:38 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Arcos",
"H. I.",
""
],
[
"Pereira",
"J. G.",
""
]
] | The role played by torsion in gravitation is critically reviewed. After a description of the problems and controversies involving the physics of torsion, a comprehensive presentation of the teleparallel equivalent of general relativity is made. According to this theory, curvature and torsion are alternative ways of des... |
1706.06597 | Carlos A. R. Herdeiro | Carlos A. R. Herdeiro and Eugen Radu | Kerr black holes with synchronised hair: an analytic model and dynamical
formation | 5+2 pages, 7 figures; data files and Mathematica notebooks can be
found in this URL: http://gravitation.web.ua.pt/index.php?q=node/716 | Phys. Rev. Lett. 119, 261101 (2017) | 10.1103/PhysRevLett.119.261101 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | East and Pretorius (arXiv:1704.04791) have successfully evolved, using fully
non-linear numerical simulations, the superradiant instability of the Kerr
black hole (BH) triggered by a massive, complex vector field. Evolutions
terminate in stationary states of a vector field condensate synchronised with a
rotating BH h... | [
{
"created": "Tue, 20 Jun 2017 18:00:03 GMT",
"version": "v1"
}
] | 2018-01-03 | [
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Radu",
"Eugen",
""
]
] | East and Pretorius (arXiv:1704.04791) have successfully evolved, using fully non-linear numerical simulations, the superradiant instability of the Kerr black hole (BH) triggered by a massive, complex vector field. Evolutions terminate in stationary states of a vector field condensate synchronised with a rotating BH hor... |
1403.5484 | Thomas W. Baumgarte | Kenneth A. Dennison and Thomas W. Baumgarte | A Simple Family of Analytical Trumpet Slices of the Schwarzschild
Spacetime | 7 pages, 3 figures | null | 10.1088/0264-9381/31/11/117001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a simple family of analytical coordinate systems for the
Schwarzschild spacetime. The coordinates penetrate the horizon smoothly and are
spatially isotropic. Spatial slices of constant coordinate time $t$ feature a
trumpet geometry with an asymptotically cylindrical end inside the horizon at a
prescribed ... | [
{
"created": "Fri, 21 Mar 2014 15:03:33 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Dennison",
"Kenneth A.",
""
],
[
"Baumgarte",
"Thomas W.",
""
]
] | We describe a simple family of analytical coordinate systems for the Schwarzschild spacetime. The coordinates penetrate the horizon smoothly and are spatially isotropic. Spatial slices of constant coordinate time $t$ feature a trumpet geometry with an asymptotically cylindrical end inside the horizon at a prescribed ar... |
1609.07804 | Ali \"Ovg\"un Dr. | A. \"Ovg\"un | The Bekenstein-Hawking Corpuscular Cascading from the Backreacted Black
Hole | 10 pages, accepted for publication in Advances in High Energy Physics | Advances in High Energy Physics, vol. 2017, Article ID 1573904, 9
pages, 2017 | 10.1155/2017/1573904 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Exciting peculiarities of Planck-scale physics have immediate effects on the
Bekenstein-Hawking radiation emitted from black holes (BHs). In this paper,
using the tunneling formalism, we determine the Bekenstein-Hawking temperature
for the vector particles from a backreacted black hole (BBH) constructed from a
confor... | [
{
"created": "Sun, 25 Sep 2016 21:22:32 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jul 2017 15:39:11 GMT",
"version": "v2"
}
] | 2017-08-22 | [
[
"Övgün",
"A.",
""
]
] | Exciting peculiarities of Planck-scale physics have immediate effects on the Bekenstein-Hawking radiation emitted from black holes (BHs). In this paper, using the tunneling formalism, we determine the Bekenstein-Hawking temperature for the vector particles from a backreacted black hole (BBH) constructed from a conforma... |
1808.10413 | Shuxun Tian | Shuxun Tian | Scalar-tensor nonlocal gravity | 5 pages, accepted for publication in PRD | Phys. Rev. D 98, 084040 (2018) | 10.1103/PhysRevD.98.084040 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to explain the late-time cosmological acceleration, we propose a new
pure geometric gravity based on Deser-Woodard theory, in which the expansion of
a matter-dominated universe can be accelerating. This new theory behaves as
well as general relativity in solar system and gravitational waves, which is an
impo... | [
{
"created": "Thu, 30 Aug 2018 17:32:16 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Oct 2018 04:17:07 GMT",
"version": "v2"
}
] | 2018-10-31 | [
[
"Tian",
"Shuxun",
""
]
] | In order to explain the late-time cosmological acceleration, we propose a new pure geometric gravity based on Deser-Woodard theory, in which the expansion of a matter-dominated universe can be accelerating. This new theory behaves as well as general relativity in solar system and gravitational waves, which is an import... |
2106.16014 | Lloren\c{c} Espinosa-Portal\'es | Juan Garcia-Bellido and Llorenc Espinosa-Portales | Cosmic acceleration from first principles | 6 pages, 5 figures. Comments added. Matches version accepted by PDU | Physics of the Dark Universe 34 (2021) 100892 | 10.1016/j.dark.2021.100892 | IFT-UAM/CSIC-21-75 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativistic entropic acceleration theory may explain the present
cosmic acceleration from first principles without the need of introducing a
cosmological constant. Following the covariant formulation of non-equilibrium
phenomena in the context of a homogeneous and isotropic
Friedmann-Lemaitre-Robertson-Walke... | [
{
"created": "Wed, 30 Jun 2021 12:30:26 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Oct 2021 15:33:49 GMT",
"version": "v2"
}
] | 2021-10-20 | [
[
"Garcia-Bellido",
"Juan",
""
],
[
"Espinosa-Portales",
"Llorenc",
""
]
] | General relativistic entropic acceleration theory may explain the present cosmic acceleration from first principles without the need of introducing a cosmological constant. Following the covariant formulation of non-equilibrium phenomena in the context of a homogeneous and isotropic Friedmann-Lemaitre-Robertson-Walker ... |
2004.12320 | {\L}ukasz Nakonieczny | {\L}ukasz Nakonieczny | Top-down approach to the curved spacetime effective feld theory (cEFT)
-- theory and examples | 4 pages, 2 figures, proceedings of 6th Conference of the Polish
Society on Relativity to be published in Acta Physica Polonica B | Acta Physica Polonica B Proceedings Supplement, vol 13 (2020) no 2 | 10.5506/APhysPolBSupp.13.209 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effective field theory (EFT) turns out to be an instrument of an immense
value in all aspects of modern particle physics being theory, phenomenology or
experiment. In the paper I will show how to extend the systematic top down
approach to construction of the EFT proposed by Hitoshi Murayama (LBL,
Berkeley) and se... | [
{
"created": "Sun, 26 Apr 2020 08:59:15 GMT",
"version": "v1"
}
] | 2021-02-18 | [
[
"Nakonieczny",
"Łukasz",
""
]
] | The effective field theory (EFT) turns out to be an instrument of an immense value in all aspects of modern particle physics being theory, phenomenology or experiment. In the paper I will show how to extend the systematic top down approach to construction of the EFT proposed by Hitoshi Murayama (LBL, Berkeley) and sepa... |
2103.02057 | Paolo Meda | Paolo Meda, Nicola Pinamonti, Simone Roncallo, Nino Zangh\`i | Evaporation of four-dimensional dynamical black holes sourced by the
quantum trace anomaly | 21 pages, 2 figure. Changed abstract and introduction, modified
section 3, added figure about the smearing function. Added some references
and made minor corrections. Made slightly modifications of the ANEC and of
the smearing function presented in the statement of Theorem 4.1 (p.10). Added
corrections to the f... | Classical and Quantum Gravity (2021) | 10.1088/1361-6382/ac1fd2 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evaporation of a four-dimensional spherically symmetric black
hole formed in a gravitational collapse. We analyze the back-reaction of a
massless quantum scalar field conformally coupled to the scalar curvature by
means of the semiclassical Einstein equations. We show that the evaporation is
linked to an... | [
{
"created": "Tue, 2 Mar 2021 22:13:19 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Sep 2021 21:05:15 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Nov 2021 15:38:18 GMT",
"version": "v3"
}
] | 2021-11-30 | [
[
"Meda",
"Paolo",
""
],
[
"Pinamonti",
"Nicola",
""
],
[
"Roncallo",
"Simone",
""
],
[
"Zanghì",
"Nino",
""
]
] | We study the evaporation of a four-dimensional spherically symmetric black hole formed in a gravitational collapse. We analyze the back-reaction of a massless quantum scalar field conformally coupled to the scalar curvature by means of the semiclassical Einstein equations. We show that the evaporation is linked to an i... |
gr-qc/0406008 | Jose Manuel Velhinho | J. M. Velhinho | Comments on the kinematical structure of loop quantum cosmology | 7 pages | Class.Quant.Grav. 21 (2004) L109 | 10.1088/0264-9381/21/15/L01 | null | gr-qc | null | We comment on the presence of spurious observables and on a subtle violation
of irreducibility in loop quantum cosmology.
| [
{
"created": "Wed, 2 Jun 2004 19:28:00 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Velhinho",
"J. M.",
""
]
] | We comment on the presence of spurious observables and on a subtle violation of irreducibility in loop quantum cosmology. |
1304.0594 | Ruxandra Bondarescu | Andrew P. Lundgren (Max Planck Institute for Gravitational Physics,
Hannover), Ruxandra Bondarescu (University of Zurich) and Mihai Bondarescu
(Universitatea de Vest Timisoara and University of Mississippi) | Merging Gravitation with Thermodynamics to Understand Cosmology | 6 pages, no figures | null | null | null | gr-qc astro-ph.CO math-ph math.MP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the evolution of the universe in the context of the second law of
thermodynamics from its early stages to the far future. Cosmological
observations suggest that most matter and radiation will be absorbed by the
cosmological horizon. On the local scale, the matter that is not ejected from
our supercluster w... | [
{
"created": "Tue, 2 Apr 2013 11:43:14 GMT",
"version": "v1"
}
] | 2013-04-03 | [
[
"Lundgren",
"Andrew P.",
"",
"Max Planck Institute for Gravitational Physics,\n Hannover"
],
[
"Bondarescu",
"Ruxandra",
"",
"University of Zurich"
],
[
"Bondarescu",
"Mihai",
"",
"Universitatea de Vest Timisoara and University of Mississippi"
]
] | We discuss the evolution of the universe in the context of the second law of thermodynamics from its early stages to the far future. Cosmological observations suggest that most matter and radiation will be absorbed by the cosmological horizon. On the local scale, the matter that is not ejected from our supercluster wil... |
gr-qc/9910072 | B. V. Ivanov | B. V. Ivanov | Towards a regular type N vacuum gravitational field | 4 pages, RevTeX | null | null | null | gr-qc | null | An exact twisting type N vacuum solution is found. It has regular gauge and
curvature invariants and decays to flat spacetime for big retarded times.
| [
{
"created": "Thu, 21 Oct 1999 07:54:42 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ivanov",
"B. V.",
""
]
] | An exact twisting type N vacuum solution is found. It has regular gauge and curvature invariants and decays to flat spacetime for big retarded times. |
2302.00950 | Jia-Xi Feng | Jia-Xi Feng, Fengge Zhang, and Xian Gao | Scalar induced gravitational waves from Chern-Simons gravity during
inflation era | 23 pages, references added, and a new discussion about a linear
coupling function added. Version to be published in JCAP | null | 10.1088/1475-7516/2023/07/047 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the scalar induced gravitational waves (SIGWs) in the
Chern-Simons (CS) gravity with a dynamical scalar field during slow roll
inflation. Due to the parity violation in the CS term, the SIGWs are generally
polarized, which are effectively characterized by the degree of circular
polarization. We derive ... | [
{
"created": "Thu, 2 Feb 2023 08:43:28 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Jul 2023 13:12:21 GMT",
"version": "v2"
}
] | 2023-07-26 | [
[
"Feng",
"Jia-Xi",
""
],
[
"Zhang",
"Fengge",
""
],
[
"Gao",
"Xian",
""
]
] | We investigate the scalar induced gravitational waves (SIGWs) in the Chern-Simons (CS) gravity with a dynamical scalar field during slow roll inflation. Due to the parity violation in the CS term, the SIGWs are generally polarized, which are effectively characterized by the degree of circular polarization. We derive th... |
0706.1899 | Lorenzo Fatibene | L. Fatibene, M. Francaviglia, C. Rovelli | Spacetime Lagrangian Formulation of Barbero-Immirzi Gravity | 12 pages, no figures | Class.Quant.Grav.24:4207-4218,2007 | 10.1088/0264-9381/24/16/014 | null | gr-qc | null | We shall here discuss a new spacetime gauge-covariant Lagrangian formulation
of General Relativity by means of the Barbero-Immirzi SU(2)-connection on
spacetime. To the best of our knowledge the Lagrangian based on SU(2) spacetime
fields seems to appear here for the first time.
| [
{
"created": "Wed, 13 Jun 2007 13:39:53 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Fatibene",
"L.",
""
],
[
"Francaviglia",
"M.",
""
],
[
"Rovelli",
"C.",
""
]
] | We shall here discuss a new spacetime gauge-covariant Lagrangian formulation of General Relativity by means of the Barbero-Immirzi SU(2)-connection on spacetime. To the best of our knowledge the Lagrangian based on SU(2) spacetime fields seems to appear here for the first time. |
1009.1884 | Philippe G. LeFloch | Philippe G. LeFloch | Einstein spacetimes with weak regularity | 15 pages | AMS/IP Stud.Adv.Math.49:81-96,2011 | null | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review recent work on the Einstein equations of general relativity when
the curvature is defined in a weak sense. Weakly regular spacetimes are
constructed, in which impulsive gravitational waves, as well as shock waves,
propagate.
| [
{
"created": "Thu, 9 Sep 2010 20:42:46 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jan 2011 19:49:57 GMT",
"version": "v2"
}
] | 2011-08-09 | [
[
"LeFloch",
"Philippe G.",
""
]
] | We review recent work on the Einstein equations of general relativity when the curvature is defined in a weak sense. Weakly regular spacetimes are constructed, in which impulsive gravitational waves, as well as shock waves, propagate. |
2403.07130 | Hermano Velten | Jonas Pinheiro da Silva and Hermano Velten | Selecting energy-momentum trace dependent gravity theories with LSS | V2 substantially improved after the comments we received. Main
results unchanged. This version also revisits the conclusion of our previous
work in Phys. Dark Univ. 43 (2024) 101401 | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We study scalar cosmological perturbations in $f(R, T)$ modified gravity
theories being $T$ the trace of the energy-momentum tensor. We provide detailed
equations for the matter energy density contrast. We solve then numerically to
promote a comparison with available large scale structure (LSS) formation
observationa... | [
{
"created": "Mon, 11 Mar 2024 19:54:30 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Apr 2024 18:46:14 GMT",
"version": "v2"
}
] | 2024-04-10 | [
[
"da Silva",
"Jonas Pinheiro",
""
],
[
"Velten",
"Hermano",
""
]
] | We study scalar cosmological perturbations in $f(R, T)$ modified gravity theories being $T$ the trace of the energy-momentum tensor. We provide detailed equations for the matter energy density contrast. We solve then numerically to promote a comparison with available large scale structure (LSS) formation observational ... |
2112.11982 | Atsushi Nishizawa | Atsushi Nishizawa, Shoki Iwaguchi, Yanbei Chen, Taigen Morimoto,
Tomohiro Ishikawa, Bin Wu, Izumi Watanabe, Yuki Kawasaki, Ryuma Shimizu,
Hirohiko Shimizu, Masaaki Kitaguchi, Yuta Michimura, and Seiji Kawamura | Neutron displacement noise-free interferometer for gravitational-wave
detection | 7 pages, 5 figures. Published version in Physical Review D | null | 10.1103/PhysRevD.105.124017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An interferometer design that cancels all displacement noises of its test
masses and maintains a gravitational-wave (GW) signal by combining multiple
detector signals is called a displacement noise-free interferometer (DFI). The
idea has been considered previously for a laser interferometer. However, a
limitation of ... | [
{
"created": "Wed, 22 Dec 2021 15:53:24 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Feb 2022 06:19:53 GMT",
"version": "v2"
},
{
"created": "Tue, 24 May 2022 02:11:55 GMT",
"version": "v3"
}
] | 2022-06-22 | [
[
"Nishizawa",
"Atsushi",
""
],
[
"Iwaguchi",
"Shoki",
""
],
[
"Chen",
"Yanbei",
""
],
[
"Morimoto",
"Taigen",
""
],
[
"Ishikawa",
"Tomohiro",
""
],
[
"Wu",
"Bin",
""
],
[
"Watanabe",
"Izumi",
""
],
[
... | An interferometer design that cancels all displacement noises of its test masses and maintains a gravitational-wave (GW) signal by combining multiple detector signals is called a displacement noise-free interferometer (DFI). The idea has been considered previously for a laser interferometer. However, a limitation of a ... |
gr-qc/0612135 | Mariam Bouhmadi-Lopez | Mariam Bouhmadi-Lopez, Pedro F. Gonzalez-Diaz and Prado Martin-Moruno | Worse than a big rip? | 6 pages, 4 figures, RevTeX 4. Discussion expanded and references
added. Version to appear in PLB | Phys.Lett.B659:1-5,2008 | 10.1016/j.physletb.2007.10.079 | null | gr-qc | null | We show that a generalised phantom Chaplygin gas can present a future
singularity in a finite future cosmic time. Unlike the big rip singularity,
this singularity happens for a finite scale factor, but like the big rip
singularity, it would also take place at a finite future cosmic time. In
addition, we define a dual... | [
{
"created": "Thu, 21 Dec 2006 15:22:33 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Oct 2007 14:39:53 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bouhmadi-Lopez",
"Mariam",
""
],
[
"Gonzalez-Diaz",
"Pedro F.",
""
],
[
"Martin-Moruno",
"Prado",
""
]
] | We show that a generalised phantom Chaplygin gas can present a future singularity in a finite future cosmic time. Unlike the big rip singularity, this singularity happens for a finite scale factor, but like the big rip singularity, it would also take place at a finite future cosmic time. In addition, we define a dual o... |
gr-qc/9501004 | Franz Embacher | Franz Embacher | Actions for signature change | 36 pages, LaTeX, no figures; some corrections have been made, several
Comments and further references are included and a note has been added. | Phys.Rev. D51 (1995) 6764-6777 | 10.1103/PhysRevD.51.6764 | UWThPh-1995-1 | gr-qc | null | This is a contribution on the controversy about junction conditions for
classical signature change. The central issue in this debate is whether the
extrinsic curvature on slices near the hypersurface of signature change has to
be continuous ({\it weak} signature change) or to vanish ({\it strong}
signature change). L... | [
{
"created": "Mon, 9 Jan 1995 11:03:00 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Feb 1995 10:55:00 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Feb 1995 11:27:00 GMT",
"version": "v3"
},
{
"created": "Mon, 13 Feb 1995 10:57:00 GMT",
"version": "v4"
}
] | 2016-08-31 | [
[
"Embacher",
"Franz",
""
]
] | This is a contribution on the controversy about junction conditions for classical signature change. The central issue in this debate is whether the extrinsic curvature on slices near the hypersurface of signature change has to be continuous ({\it weak} signature change) or to vanish ({\it strong} signature change). Led... |
1908.10370 | Horng Sheng Chia | Daniel Baumann, Horng Sheng Chia, John Stout, Lotte ter Haar | The Spectra of Gravitational Atoms | 47+25 pages, 16 figures | null | 10.1088/1475-7516/2019/12/006 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the quasi-bound state spectra of ultralight scalar and vector
fields around rotating black holes. These spectra are determined by the
gravitational fine structure constant $\alpha$, which is the ratio of the size
of the black hole to the Compton wavelength of the field. When $\alpha$ is
small, the energy e... | [
{
"created": "Tue, 27 Aug 2019 18:00:01 GMT",
"version": "v1"
}
] | 2019-12-11 | [
[
"Baumann",
"Daniel",
""
],
[
"Chia",
"Horng Sheng",
""
],
[
"Stout",
"John",
""
],
[
"ter Haar",
"Lotte",
""
]
] | We compute the quasi-bound state spectra of ultralight scalar and vector fields around rotating black holes. These spectra are determined by the gravitational fine structure constant $\alpha$, which is the ratio of the size of the black hole to the Compton wavelength of the field. When $\alpha$ is small, the energy eig... |
gr-qc/9912102 | William A. Hiscock | Shane L. Larson and William A. Hiscock (Montana State University) | Using binary stars to bound the mass of the graviton | 21 pages plus 4 figures; ReVTeX | Phys.Rev. D61 (2000) 104008 | 10.1103/PhysRevD.61.104008 | MSUPHY99.08 | gr-qc | null | Interacting white dwarf binary star systems, including helium cataclysmic
variable (HeCV) systems, are expected to be strong sources of gravitational
radiation, and should be detectable by proposed space-based laser
interferometer gravitational wave observatories such as LISA. Several HeCV star
systems are presently ... | [
{
"created": "Thu, 23 Dec 1999 21:38:15 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Larson",
"Shane L.",
"",
"Montana State University"
],
[
"Hiscock",
"William A.",
"",
"Montana State University"
]
] | Interacting white dwarf binary star systems, including helium cataclysmic variable (HeCV) systems, are expected to be strong sources of gravitational radiation, and should be detectable by proposed space-based laser interferometer gravitational wave observatories such as LISA. Several HeCV star systems are presently kn... |
1205.1917 | Mikel Fern\'andez-M\'endez | Mikel Fern\'andez-M\'endez, Guillermo A. Mena Marug\'an, Javier Olmedo | Hybrid quantization of an inflationary universe | 16 pages, no figures | Phys. Rev. D 86, 024003 (2012) | 10.1103/PhysRevD.86.024003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We quantize to completion an inflationary universe with small inhomogeneities
in the framework of loop quantum cosmology. The homogeneous setting consists of
a massive scalar field propagating in a closed, homogeneous scenario. We
provide a complete quantum description of the system employing loop
quantization techni... | [
{
"created": "Wed, 9 May 2012 09:09:39 GMT",
"version": "v1"
}
] | 2012-07-20 | [
[
"Fernández-Méndez",
"Mikel",
""
],
[
"Marugán",
"Guillermo A. Mena",
""
],
[
"Olmedo",
"Javier",
""
]
] | We quantize to completion an inflationary universe with small inhomogeneities in the framework of loop quantum cosmology. The homogeneous setting consists of a massive scalar field propagating in a closed, homogeneous scenario. We provide a complete quantum description of the system employing loop quantization techniqu... |
gr-qc/0201080 | Lorenzo Iorio | Lorenzo Iorio | Light deflection and time delay in the gravitational field of a spinning
mass | LaTex, 10 pages, no figures, no tables. Accepted for publication in
Il Nuovo Cimento B. References added, small errors corrected | Nuovo Cim.B118:249-258,2003 | null | null | gr-qc astro-ph physics.space-ph | null | In this paper we consider the possibility of measuring the corrections
induced by the square of the parameter a_g of the Kerr metric to the general
relativistic deflection of electromagnetic waves and time delay in an Earth
based experiment. It turns out that, while at astronomical scale the well known
gravitoelectri... | [
{
"created": "Thu, 24 Jan 2002 14:04:52 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Feb 2002 20:50:44 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Feb 2002 23:10:21 GMT",
"version": "v3"
},
{
"created": "Wed, 18 Jun 2003 11:24:33 GMT",
"version": "v4"
}
] | 2010-11-19 | [
[
"Iorio",
"Lorenzo",
""
]
] | In this paper we consider the possibility of measuring the corrections induced by the square of the parameter a_g of the Kerr metric to the general relativistic deflection of electromagnetic waves and time delay in an Earth based experiment. It turns out that, while at astronomical scale the well known gravitoelectric ... |
1305.6138 | Alessandro Tronconi | Alexander Y. Kamenshchik, Alessandro Tronconi, Giovanni Venturi | Inflation and Quantum Gravity in a Born-Oppenheimer Context | 13 pages, no figures. Final version, accepted for publication in PLB | null | 10.1016/j.physletb.2013.08.067 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general equation, describing the lowest order corrections coming from
quantum gravitational effects to the spectrum of cosmological scalar
fluctuations is obtained. These corrections are explicitly estimated for the
case of a de Sitter evolution.
| [
{
"created": "Mon, 27 May 2013 08:07:29 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Sep 2013 07:11:46 GMT",
"version": "v2"
}
] | 2015-06-16 | [
[
"Kamenshchik",
"Alexander Y.",
""
],
[
"Tronconi",
"Alessandro",
""
],
[
"Venturi",
"Giovanni",
""
]
] | A general equation, describing the lowest order corrections coming from quantum gravitational effects to the spectrum of cosmological scalar fluctuations is obtained. These corrections are explicitly estimated for the case of a de Sitter evolution. |
gr-qc/9709036 | Neil John Cornish | Neil J. Cornish (DAMTP, Cambridge University) | Fractals and Symbolic Dynamics as Invariant Descriptors of Chaos in
General Relativity | 3 pages, 4 figures. To appear in the proceedings of the Eighth Marcel
Grossmann Meeting, Jerusalem, June 1997 (WSP) | null | null | DAMTP-R97-48 | gr-qc | null | The study of dynamics in general relativity has been hampered by a lack of
coordinate independent measures of chaos. Here I review a variety of invariant
measures for quantifying chaotic dynamics in relativity that exploit the
coordinate independence of fractal dimensions and symbolic entropies.
| [
{
"created": "Mon, 15 Sep 1997 12:42:16 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Cornish",
"Neil J.",
"",
"DAMTP, Cambridge University"
]
] | The study of dynamics in general relativity has been hampered by a lack of coordinate independent measures of chaos. Here I review a variety of invariant measures for quantifying chaotic dynamics in relativity that exploit the coordinate independence of fractal dimensions and symbolic entropies. |
1001.4227 | Chen Songbai | Jiliang Jing, Songbai Chen | Holographic superconductors in the Born-Infeld electrodynamics | 9 pages, 2 figures, references added and corrected, the version
appears in PLB | Physics Letters B 686 (2010) 68-71 | 10.1016/j.physletb.2010.02.022 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effects of the Born-Infeld electrodynamics on the holographic
superconductors in the background of a Schwarzschild AdS black hole spacetime.
We find that the presence of Born-Infeld scale parameter decreases the critical
temperature and the ratio of the gap frequency in conductivity to the critical
tempe... | [
{
"created": "Sun, 24 Jan 2010 07:48:59 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Feb 2010 07:03:25 GMT",
"version": "v2"
},
{
"created": "Tue, 8 Jun 2010 03:58:11 GMT",
"version": "v3"
}
] | 2015-05-18 | [
[
"Jing",
"Jiliang",
""
],
[
"Chen",
"Songbai",
""
]
] | We study the effects of the Born-Infeld electrodynamics on the holographic superconductors in the background of a Schwarzschild AdS black hole spacetime. We find that the presence of Born-Infeld scale parameter decreases the critical temperature and the ratio of the gap frequency in conductivity to the critical tempera... |
gr-qc/9912003 | Marco Montuori | Yurij V. Baryshev (Astronomical Institute of the Saint-Petersburg
University, St.-Petersburg, Russia) | Field Theory of Gravitation: Desire and Reality | 17 pages, no figures, edited and updated from journal version | Gravitation, vol.2, p69-81 (1996) | null | null | gr-qc astro-ph hep-th | null | A retrospective analysis of the field theory of gravitation, describing
gravitational field in the same way as other fields of matter in the flat
space-time, is done. The field approach could be called "quantum gravidynamics"
to distinguish it from the "geometrodynamics" or general relativity. The basic
propositions ... | [
{
"created": "Wed, 1 Dec 1999 10:07:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Baryshev",
"Yurij V.",
"",
"Astronomical Institute of the Saint-Petersburg\n University, St.-Petersburg, Russia"
]
] | A retrospective analysis of the field theory of gravitation, describing gravitational field in the same way as other fields of matter in the flat space-time, is done. The field approach could be called "quantum gravidynamics" to distinguish it from the "geometrodynamics" or general relativity. The basic propositions an... |
1707.07235 | J. Arturo Olvera | R. Cartas-Fuentevilla, A. Herrera-Aguilar, J. A. Olvera-Santamar\'ia | Evolution and metric signature change of maximally symmetric spaces
under the Ricci flow | 16 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we present solutions to the Ricci flow equations in arbitrary
dimensions, particularizing for the $3d$ and $4d$ cases. We start by
considering the $3d$ case and note that our solutions belong to the family of
maximally symmetric spaces that can be extended to the $d\geq 4$ case following
an analogue trea... | [
{
"created": "Sun, 23 Jul 2017 01:04:24 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Nov 2017 23:33:51 GMT",
"version": "v2"
},
{
"created": "Mon, 21 May 2018 15:04:20 GMT",
"version": "v3"
}
] | 2018-05-22 | [
[
"Cartas-Fuentevilla",
"R.",
""
],
[
"Herrera-Aguilar",
"A.",
""
],
[
"Olvera-Santamaría",
"J. A.",
""
]
] | In this work we present solutions to the Ricci flow equations in arbitrary dimensions, particularizing for the $3d$ and $4d$ cases. We start by considering the $3d$ case and note that our solutions belong to the family of maximally symmetric spaces that can be extended to the $d\geq 4$ case following an analogue treatm... |
gr-qc/0311030 | Bahram Mashhoon | Bahram Mashhoon | Gravitoelectromagnetism: A Brief Review | 15 pages, no figures; v2: slightly improved version published as the
third chapter of The Measurement of Gravitomagnetism: A Challenging
Enterprise, edited by L. Iorio (Nova Science, New York, 2007), pp. 29-39 | null | null | null | gr-qc astro-ph | null | The main theoretical aspects of gravitoelectromagnetism ("GEM") are
presented. Two basic approaches to this subject are described and the role of
the gravitational Larmor theorem is emphasized. Some of the consequences of GEM
are briefly mentioned.
| [
{
"created": "Sat, 8 Nov 2003 19:39:33 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Apr 2008 18:32:41 GMT",
"version": "v2"
}
] | 2008-04-17 | [
[
"Mashhoon",
"Bahram",
""
]
] | The main theoretical aspects of gravitoelectromagnetism ("GEM") are presented. Two basic approaches to this subject are described and the role of the gravitational Larmor theorem is emphasized. Some of the consequences of GEM are briefly mentioned. |
gr-qc/9704072 | Gary Horowitz | Gary T. Horowitz | Quantum States of Black Holes | 33 pages, Latex, a few clarifying comments added | null | null | null | gr-qc astro-ph hep-th | null | I review the recent progress in providing a statistical foundation for black
hole thermodynamics. In the context of string theory, one can now identify and
count quantum states associated with black holes. One can also compute the
analog of Hawking radiation (in a certain low energy regime) in a manifestly
unitary wa... | [
{
"created": "Fri, 25 Apr 1997 20:37:45 GMT",
"version": "v1"
},
{
"created": "Tue, 13 May 1997 21:10:10 GMT",
"version": "v2"
},
{
"created": "Wed, 30 Jul 1997 17:20:28 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Horowitz",
"Gary T.",
""
]
] | I review the recent progress in providing a statistical foundation for black hole thermodynamics. In the context of string theory, one can now identify and count quantum states associated with black holes. One can also compute the analog of Hawking radiation (in a certain low energy regime) in a manifestly unitary way.... |
2307.10368 | Lorenzo Annulli | Lorenzo Annulli and Carlos A. R. Herdeiro | Non-linear tides and Gauss-Bonnet scalarization | 13 pages, 13 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In linear perturbation theory, a static perturber in the vicinity of a
Schwarzschild black hole (BH) enhances [suppresses] the Gauss-Bonnet (GB)
curvature invariant, $\mathcal{R}_{\rm GB}$, in the high [low] tide regions. By
analysing exact solutions of the vacuum Einstein field equations describing one
or two BHs im... | [
{
"created": "Wed, 19 Jul 2023 18:00:02 GMT",
"version": "v1"
}
] | 2023-07-21 | [
[
"Annulli",
"Lorenzo",
""
],
[
"Herdeiro",
"Carlos A. R.",
""
]
] | In linear perturbation theory, a static perturber in the vicinity of a Schwarzschild black hole (BH) enhances [suppresses] the Gauss-Bonnet (GB) curvature invariant, $\mathcal{R}_{\rm GB}$, in the high [low] tide regions. By analysing exact solutions of the vacuum Einstein field equations describing one or two BHs imme... |
2012.10471 | Branislav Cvetkovi\'c | Milutin Blagojevi\'c and Branislav Cvetkovi\'c | Thermodynamics of Kerr-AdS black holes in general Poincar\'e gauge
theory | LaTex, 12 pages; v2 minor corrections | Phys. Rev. D 103, 064034 (2021) | 10.1103/PhysRevD.103.064034 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Hamiltonian variational approach is used to study asymptotic charges and
entropy of Kerr-AdS black holes in the general Poincar\'e gauge theory, with
both even and odd parity modes. The results turn out to be the same as those
found earlier in the sector of parity invariant Lagrangians.
| [
{
"created": "Fri, 18 Dec 2020 19:16:55 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Mar 2021 19:20:13 GMT",
"version": "v2"
}
] | 2021-03-24 | [
[
"Blagojević",
"Milutin",
""
],
[
"Cvetković",
"Branislav",
""
]
] | A Hamiltonian variational approach is used to study asymptotic charges and entropy of Kerr-AdS black holes in the general Poincar\'e gauge theory, with both even and odd parity modes. The results turn out to be the same as those found earlier in the sector of parity invariant Lagrangians. |
1107.4469 | Bijan Saha Dr. | Bijan Saha | Some remarks on Bianchi type-II, VIII and IX models | 8 pages | Gravitation & Cosmology 19(1), (2013) 65 - 69 | 10.1134/S0202289313010088 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the scope of anisotropic non-diagonal Bianchi type-II, VIII and IX
spacetime it is shown that the off-diagonal components of the corresponding
metric impose severe restrictions on the components of the energy momentum
tensor in general. If the energy momentum tensor is considered to be diagonal
one, the spacet... | [
{
"created": "Fri, 22 Jul 2011 10:06:09 GMT",
"version": "v1"
}
] | 2020-07-17 | [
[
"Saha",
"Bijan",
""
]
] | Within the scope of anisotropic non-diagonal Bianchi type-II, VIII and IX spacetime it is shown that the off-diagonal components of the corresponding metric impose severe restrictions on the components of the energy momentum tensor in general. If the energy momentum tensor is considered to be diagonal one, the spacetim... |
1310.5587 | Karl Wette | Karl Wette and Reinhard Prix | Flat parameter-space metric for all-sky searches for gravitational-wave
pulsars | 19 pages, 20 figures | Phys. Rev. D 88, 123005 (2013) | 10.1103/PhysRevD.88.123005 | AEI-2013-247; LIGO-P1300155-v3 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | All-sky, broadband, coherent searches for gravitational-wave pulsars are
computationally limited. It is therefore important to make efficient use of
available computational resources, notably by minimizing the number of
templates used to cover the signal parameter space of sky position and
frequency evolution. For se... | [
{
"created": "Mon, 21 Oct 2013 15:09:30 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Dec 2013 17:33:57 GMT",
"version": "v2"
}
] | 2013-12-16 | [
[
"Wette",
"Karl",
""
],
[
"Prix",
"Reinhard",
""
]
] | All-sky, broadband, coherent searches for gravitational-wave pulsars are computationally limited. It is therefore important to make efficient use of available computational resources, notably by minimizing the number of templates used to cover the signal parameter space of sky position and frequency evolution. For sear... |
1911.07645 | Jan Patrick Hackstein | Jan P. Hackstein, Eva Hackmann | Influence of weak electromagnetic fields on charged particle ISCOs | 19 pages, 9 figues; v2: typos corrected | Gen. Relativ. Gravit. 52:22 (2020) | 10.1007/s10714-020-02675-1 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Astrophysical black holes are often embedded into electromagnetic fields,
that can usually be treated as test fields not influencing the spacetime
geometry. Here we analyse the innermost stable circular orbit (ISCO) of charged
particles moving around a Schwarzschild black hole in the presence of a radial
electric tes... | [
{
"created": "Mon, 18 Nov 2019 13:57:02 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Mar 2020 10:47:17 GMT",
"version": "v2"
}
] | 2020-03-11 | [
[
"Hackstein",
"Jan P.",
""
],
[
"Hackmann",
"Eva",
""
]
] | Astrophysical black holes are often embedded into electromagnetic fields, that can usually be treated as test fields not influencing the spacetime geometry. Here we analyse the innermost stable circular orbit (ISCO) of charged particles moving around a Schwarzschild black hole in the presence of a radial electric test ... |
1801.05138 | Ramon Herrera | Ramon Herrera | Reconstructing warm inflation | Tensor to scalar ratio was given incorrect in previous version.
Update here | null | 10.1140/epjc/s10052-018-5741-0 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The reconstruction of a warm inflationary universe model from the scalar
spectral index $n_S(N)$ and the tensor to scalar ratio $r(N)$ as a function of
the number of e-folds $N$ is studied. Under a general formalism we find the
effective potential and the dissipative coefficient in terms of the
cosmological parameter... | [
{
"created": "Tue, 16 Jan 2018 07:21:40 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jan 2018 06:54:49 GMT",
"version": "v2"
}
] | 2018-04-18 | [
[
"Herrera",
"Ramon",
""
]
] | The reconstruction of a warm inflationary universe model from the scalar spectral index $n_S(N)$ and the tensor to scalar ratio $r(N)$ as a function of the number of e-folds $N$ is studied. Under a general formalism we find the effective potential and the dissipative coefficient in terms of the cosmological parameters ... |
2012.08413 | Miguel Zilhao | Raimon Luna, Miguel Zilh\~ao, Vitor Cardoso, Jo\~ao L. Costa, Jos\'e
Nat\'ario | Addendum to "Strong cosmic censorship: The nonlinear story" | 4 pages, 2 figures. Updates title to match published version | Phys. Rev. D 103, 104043 (2021) | 10.1103/PhysRevD.103.104043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We clarify a number of issues that arise when extending the analysis of
Strong Cosmic Censorship (SCC) to perturbations of highly charged
Reissner-Nordstr\"{o}m de Sitter (RNdS) spacetimes. The linear stability of the
Cauchy horizon can be determined from the spectral gap of quasinormal modes,
thus giving a clear ide... | [
{
"created": "Tue, 15 Dec 2020 16:47:07 GMT",
"version": "v1"
},
{
"created": "Mon, 10 May 2021 19:17:17 GMT",
"version": "v2"
},
{
"created": "Thu, 20 May 2021 10:30:04 GMT",
"version": "v3"
}
] | 2021-05-21 | [
[
"Luna",
"Raimon",
""
],
[
"Zilhão",
"Miguel",
""
],
[
"Cardoso",
"Vitor",
""
],
[
"Costa",
"João L.",
""
],
[
"Natário",
"José",
""
]
] | We clarify a number of issues that arise when extending the analysis of Strong Cosmic Censorship (SCC) to perturbations of highly charged Reissner-Nordstr\"{o}m de Sitter (RNdS) spacetimes. The linear stability of the Cauchy horizon can be determined from the spectral gap of quasinormal modes, thus giving a clear idea ... |
2001.06310 | \.Ibrahim Semiz | \.Ibrahim Semiz | On the (non)genericity of the Kiselev spacetime | No figures, one table. v2: Format change from "Comment" to short
paper; one reference added | IOP SciNotes 1 025206 (2020) | 10.1088/2633-1357/aba1f5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In many works in the literature, the Kiselev spacetime is interpreted as the
"blackhole surrounded by quintessence"; an interpretation not really tenable.
For example, it has recently been pointed out that the expressions "perfect
fluid" and "quintessence" are used improperly in most of the articles that
build on tha... | [
{
"created": "Thu, 16 Jan 2020 18:49:55 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Feb 2020 12:41:25 GMT",
"version": "v2"
}
] | 2020-12-15 | [
[
"Semiz",
"İbrahim",
""
]
] | In many works in the literature, the Kiselev spacetime is interpreted as the "blackhole surrounded by quintessence"; an interpretation not really tenable. For example, it has recently been pointed out that the expressions "perfect fluid" and "quintessence" are used improperly in most of the articles that build on that ... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.