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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2005.13599 | Carlos Coimbra-Araujo | C. H. Coimbra-Ara\'ujo and R. C. Anjos | Acceleration of charged particles from near-extremal rotating black
holes embedded in magnetic fields | 13 pages, 14 figures | null | 10.1088/1361-6382/abc189 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The aim of the present article is to evaluate the motion of charged test
particles in the vicinity of a near-extremal rotating black hole in the
presence of magnetic fields. Euler-Lagrange motion equations and effective
potential methods are used to characterize the motion out of the equatorial
plane. Such approach i... | [
{
"created": "Wed, 27 May 2020 19:09:56 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Jun 2020 10:33:40 GMT",
"version": "v2"
}
] | 2021-02-03 | [
[
"Coimbra-Araújo",
"C. H.",
""
],
[
"Anjos",
"R. C.",
""
]
] | The aim of the present article is to evaluate the motion of charged test particles in the vicinity of a near-extremal rotating black hole in the presence of magnetic fields. Euler-Lagrange motion equations and effective potential methods are used to characterize the motion out of the equatorial plane. Such approach is ... |
1905.01793 | Yasusada Nambu | Yasusada Nambu, Sousuke Noda, Yuichiro Sakai | Wave Optics in Spacetimes with Compact Gravitating Object | 24 pages, accepted version in Phys. Rev. D | Phys. Rev. D 100, 064037 (2019) | 10.1103/PhysRevD.100.064037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the wave optics in spherically symmetric spacetimes:
Schwarzschild black hole, spherical star with a perfect absorbing surface, and
massless/massive Ellis wormholes. Assuming a point wave source, wave pattern
and power spectrums for scattering waves are obtained by solving the scalar
wave equation nume... | [
{
"created": "Mon, 6 May 2019 02:13:00 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Sep 2019 10:53:41 GMT",
"version": "v2"
}
] | 2019-09-25 | [
[
"Nambu",
"Yasusada",
""
],
[
"Noda",
"Sousuke",
""
],
[
"Sakai",
"Yuichiro",
""
]
] | We investigate the wave optics in spherically symmetric spacetimes: Schwarzschild black hole, spherical star with a perfect absorbing surface, and massless/massive Ellis wormholes. Assuming a point wave source, wave pattern and power spectrums for scattering waves are obtained by solving the scalar wave equation numeri... |
gr-qc/0607047 | Clifford M. Will | Emanuele Berti, Sai Iyer, Clifford M. Will (Washington University, St.
Louis) | Eccentricity content of binary black hole initial data | 5 pages, 5 figures, clarifications and minor corrections; version
submitted to Phys. Rev. D | Phys.Rev. D74 (2006) 061503 | 10.1103/PhysRevD.74.061503 | null | gr-qc | null | Using a post-Newtonian diagnostic tool developed by Mora and Will, we examine
numerically generated quasiequilibrium initial data sets that have been used in
recently successful numerical evolutions of binary black holes through plunge,
merger and ringdown. We show that a small but significant orbital eccentricity
is... | [
{
"created": "Tue, 11 Jul 2006 19:51:02 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Jul 2006 20:01:47 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Jul 2006 08:26:36 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Berti",
"Emanuele",
"",
"Washington University, St.\n Louis"
],
[
"Iyer",
"Sai",
"",
"Washington University, St.\n Louis"
],
[
"Will",
"Clifford M.",
"",
"Washington University, St.\n Louis"
]
] | Using a post-Newtonian diagnostic tool developed by Mora and Will, we examine numerically generated quasiequilibrium initial data sets that have been used in recently successful numerical evolutions of binary black holes through plunge, merger and ringdown. We show that a small but significant orbital eccentricity is r... |
gr-qc/0107038 | Spiros Cotsakis | Peter Leach, Spiros Cotsakis and John Miritzis | Symmetry, singularities and intregrability in complex dynamics VII:
Integrability Properties of FRW-Scalar Cosmologies | 22 pages, LaTeX | null | null | null | gr-qc | null | This paper considers some physically interesting cosmological dynamical
systems in the FRW-scalarfield category which are examined for integrability
according to the criterion of Painlev\'e. In the literature these systems have
been examined from the point of view of dynamical systems and the results from
the two dis... | [
{
"created": "Wed, 11 Jul 2001 06:16:35 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Leach",
"Peter",
""
],
[
"Cotsakis",
"Spiros",
""
],
[
"Miritzis",
"John",
""
]
] | This paper considers some physically interesting cosmological dynamical systems in the FRW-scalarfield category which are examined for integrability according to the criterion of Painlev\'e. In the literature these systems have been examined from the point of view of dynamical systems and the results from the two dispa... |
gr-qc/9307002 | Ted Jacobson | Ted Jacobson and Gungwon Kang | Conformal Invariance of Black Hole Temperature | 8 pages, plain LaTeX, NSF-ITP-93-91 | Class.Quant.Grav.10:L201-L206,1993 | 10.1088/0264-9381/10/11/002 | null | gr-qc hep-th | null | It is shown that the surface gravity and temperature of a stationary black
hole are invariant under conformal transformations of the metric that are the
identity at infinity. More precisely, we find a conformal invariant definition
of the surface gravity of a conformal Killing horizon that agrees with the
usual defin... | [
{
"created": "Tue, 6 Jul 1993 23:38:00 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Jacobson",
"Ted",
""
],
[
"Kang",
"Gungwon",
""
]
] | It is shown that the surface gravity and temperature of a stationary black hole are invariant under conformal transformations of the metric that are the identity at infinity. More precisely, we find a conformal invariant definition of the surface gravity of a conformal Killing horizon that agrees with the usual definit... |
2401.00091 | Valerio Faraoni | Valerio Faraoni and Carla Zeyn | Disforming scalar-tensor cosmology | 15 pages, latex. Added a section and an appendix on second order
disformal transformation, extra discussion, bibliography expanded. Matches
the version to appear in Phys. Rev. D | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Disformal transformations of Friedmann-Lema\^itre-Robertson-Walker and
Bianchi geometries are analyzed in the context of scalar-tensor gravity. Novel
aspects discussed explicitly are the $3+1$ splitting, the effective fluid
equivalent of the gravitational scalar, Bianchi models, stealth solutions, and
de Sitter solut... | [
{
"created": "Fri, 29 Dec 2023 22:30:50 GMT",
"version": "v1"
},
{
"created": "Wed, 8 May 2024 00:28:18 GMT",
"version": "v2"
}
] | 2024-05-09 | [
[
"Faraoni",
"Valerio",
""
],
[
"Zeyn",
"Carla",
""
]
] | Disformal transformations of Friedmann-Lema\^itre-Robertson-Walker and Bianchi geometries are analyzed in the context of scalar-tensor gravity. Novel aspects discussed explicitly are the $3+1$ splitting, the effective fluid equivalent of the gravitational scalar, Bianchi models, stealth solutions, and de Sitter solutio... |
1911.06116 | Ignazio Ciufolini | Ignazio Ciufolini, Richard Matzner, Vahe Gurzadyan, Roger Penrose | A new laser-ranged satellite for General Relativity and space geodesy:
III. De Sitter effect and the LARES 2 space experiment | 9 pages | Eur. Phys. J. C, 77 12 (2017) 819 | 10.1140/epjc/s10052-017-5339-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In two previous papers we presented the LARES 2 space experiment aimed at a
very accurate test of frame-dragging and at other tests of fundamental physics
and measurements of space geodesy and geodynamics. We presented the error
sources of the LARES 2 experiment, its error budget and Monte Carlo simulations
and covar... | [
{
"created": "Tue, 12 Nov 2019 10:22:35 GMT",
"version": "v1"
}
] | 2019-11-15 | [
[
"Ciufolini",
"Ignazio",
""
],
[
"Matzner",
"Richard",
""
],
[
"Gurzadyan",
"Vahe",
""
],
[
"Penrose",
"Roger",
""
]
] | In two previous papers we presented the LARES 2 space experiment aimed at a very accurate test of frame-dragging and at other tests of fundamental physics and measurements of space geodesy and geodynamics. We presented the error sources of the LARES 2 experiment, its error budget and Monte Carlo simulations and covaria... |
1902.02871 | Gernot Hei{\ss}el | David Fajman and Gernot Hei{\ss}el | Kantowski-Sachs cosmology with Vlasov matter | 19 pages, 4 figures, 1 table | null | 10.1088/1361-6382/ab2425 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the Kantowski-Sachs cosmologies with Vlasov matter of massive and
massless particles using dynamical systems analysis. We show that generic
solutions are past and future asymptotic to the non-flat locally rotationally
symmetric Kasner vacuum solution. Furthermore, we establish that solutions with
massive V... | [
{
"created": "Thu, 7 Feb 2019 22:37:14 GMT",
"version": "v1"
}
] | 2019-09-04 | [
[
"Fajman",
"David",
""
],
[
"Heißel",
"Gernot",
""
]
] | We analyse the Kantowski-Sachs cosmologies with Vlasov matter of massive and massless particles using dynamical systems analysis. We show that generic solutions are past and future asymptotic to the non-flat locally rotationally symmetric Kasner vacuum solution. Furthermore, we establish that solutions with massive Vla... |
gr-qc/0211002 | Dr. Anirudh Pradhan | Anirudh Pradhan and Hare Ram Pandey | Plane-Symmetric Inhomogeneous Bulk Viscous Cosmological Models with
Variable $\Lambda$ | 11 pages | Int.J.Mod.Phys.D12:941-952,2003 | 10.1142/S0218271803003359 | null | gr-qc | null | A plane-symmetric non-static cosmological model representing a bulk viscous
fluid distribution has been obtained which is inhomogeneous and anisotropic and
a particular case of which is gravitationally radiative. Without assuming any
{\it adhoc} law, we obtain a cosmological constant as a decreasing function of
time.... | [
{
"created": "Fri, 1 Nov 2002 11:02:27 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Pandey",
"Hare Ram",
""
]
] | A plane-symmetric non-static cosmological model representing a bulk viscous fluid distribution has been obtained which is inhomogeneous and anisotropic and a particular case of which is gravitationally radiative. Without assuming any {\it adhoc} law, we obtain a cosmological constant as a decreasing function of time. T... |
2204.08634 | Hing Tong Cho | Hing-Tong Cho, Jen-Tsung Hsiang and Bei-Lok Hu | Quantum Capacity and Vacuum Compressibility of Spacetime: Thermal Fields | 47 pages | Universe 8, 291 (2022) | null | null | gr-qc cond-mat.stat-mech hep-th quant-ph | http://creativecommons.org/licenses/by/4.0/ | An important yet perplexing result from work in the 90s and 00s is the
near-unity value of the ratio of fluctuations in the vacuum energy density of
quantum fields to the mean in a collection of generic spacetimes. This was done
by way of calculating the noise kernels which are the correlators of the
stress-energy te... | [
{
"created": "Tue, 19 Apr 2022 03:32:10 GMT",
"version": "v1"
}
] | 2023-01-10 | [
[
"Cho",
"Hing-Tong",
""
],
[
"Hsiang",
"Jen-Tsung",
""
],
[
"Hu",
"Bei-Lok",
""
]
] | An important yet perplexing result from work in the 90s and 00s is the near-unity value of the ratio of fluctuations in the vacuum energy density of quantum fields to the mean in a collection of generic spacetimes. This was done by way of calculating the noise kernels which are the correlators of the stress-energy tens... |
2105.04887 | Sayan Kar | Rajendra Prasad Bhatt, Anushree Roy and Sayan Kar (IIT Kharagpur,
India) | Analog Raychaudhuri equation in mechanics | 21 pages, 9 figures, to appear in Resonance, Journal of Science
Education (Indian Academy of Sciences) | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Usually, in mechanics, we obtain the trajectory of a particle in a given
force field by solving Newton's second law with chosen initial conditions. In
contrast, through our work here, we first demonstrate how one may analyse the
behaviour of a suitably defined family of trajectories of a given mechanical
system. Such... | [
{
"created": "Tue, 11 May 2021 09:18:58 GMT",
"version": "v1"
},
{
"created": "Thu, 19 May 2022 05:16:57 GMT",
"version": "v2"
}
] | 2022-05-20 | [
[
"Bhatt",
"Rajendra Prasad",
"",
"IIT Kharagpur,\n India"
],
[
"Roy",
"Anushree",
"",
"IIT Kharagpur,\n India"
],
[
"Kar",
"Sayan",
"",
"IIT Kharagpur,\n India"
]
] | Usually, in mechanics, we obtain the trajectory of a particle in a given force field by solving Newton's second law with chosen initial conditions. In contrast, through our work here, we first demonstrate how one may analyse the behaviour of a suitably defined family of trajectories of a given mechanical system. Such a... |
1306.4318 | Gavin Hartnett S | Gavin S. Hartnett and Jorge E. Santos | Non-Axisymmetric Instability of Rotating Black Holes in Higher
Dimensions | 5 pages, 2 figures, v2: minor revisions | null | 10.1103/PhysRevD.88.041505 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the scalar-gravitational quasi-normal modes of equal angular
momenta Myers-Perry black holes in odd dimensions. We find a new bar-mode
(non-axisymmetric) classical instability for $D \ge 7$. These black holes were
previously found to be unstable to axisymmetric perturbations for spins very
near extremali... | [
{
"created": "Tue, 18 Jun 2013 20:00:02 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Jun 2013 20:17:18 GMT",
"version": "v2"
}
] | 2013-09-04 | [
[
"Hartnett",
"Gavin S.",
""
],
[
"Santos",
"Jorge E.",
""
]
] | We calculate the scalar-gravitational quasi-normal modes of equal angular momenta Myers-Perry black holes in odd dimensions. We find a new bar-mode (non-axisymmetric) classical instability for $D \ge 7$. These black holes were previously found to be unstable to axisymmetric perturbations for spins very near extremality... |
1703.01409 | Vahid Kamali | Vahid Kamali, Spyros Basilakos, Ahmad Mehrabi, Meysam Motaharfar,
Erfan Massaeli | Tachyon warm inflation with the effects of Loop Quantum Cosmology in the
light of Planck 2015 | 11 pages, 4 figures, The paper has been accepted by IJMPD | null | 10.1142/S0218271818500566 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the observational signatures of quantum cosmology in the
Cosmic Microwave Background data provided by Planck collaboration. We apply the
warm inflationary paradigm with a tachyon scalar field to the loop quantum
cosmology. In this context, we first provide the basic cosmological functions
in terms of t... | [
{
"created": "Sat, 4 Mar 2017 07:45:25 GMT",
"version": "v1"
},
{
"created": "Sun, 14 Jan 2018 11:57:11 GMT",
"version": "v2"
}
] | 2018-04-25 | [
[
"Kamali",
"Vahid",
""
],
[
"Basilakos",
"Spyros",
""
],
[
"Mehrabi",
"Ahmad",
""
],
[
"Motaharfar",
"Meysam",
""
],
[
"Massaeli",
"Erfan",
""
]
] | We investigate the observational signatures of quantum cosmology in the Cosmic Microwave Background data provided by Planck collaboration. We apply the warm inflationary paradigm with a tachyon scalar field to the loop quantum cosmology. In this context, we first provide the basic cosmological functions in terms of the... |
1210.3860 | Bahram Mashhoon | C. Chicone and B. Mashhoon | Linearized Gravitational Waves in Nonlocal General Relativity | 30 pages, 1 figure; v2: slightly expanded and improved version | Phys. Rev. D 87, 064015 (2013) | 10.1103/PhysRevD.87.064015 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate gravitational radiation in the linear approximation within the
framework of the recent nonlocal generalization of Einstein's theory of
gravitation. In this theory, nonlocality can simulate dark matter; in fact, in
the Newtonian regime, we recover the phenomenological Tohline-Kuhn approach to
modified g... | [
{
"created": "Mon, 15 Oct 2012 00:04:53 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Mar 2013 23:38:01 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Chicone",
"C.",
""
],
[
"Mashhoon",
"B.",
""
]
] | We investigate gravitational radiation in the linear approximation within the framework of the recent nonlocal generalization of Einstein's theory of gravitation. In this theory, nonlocality can simulate dark matter; in fact, in the Newtonian regime, we recover the phenomenological Tohline-Kuhn approach to modified gra... |
2311.08229 | Luca D'Onofrio | Luca D'Onofrio (1), Rosario De Rosa (15 and 2), Cristiano Palomba (1),
Paola Leaci (1 and 3), Ornella J. Piccinni (4), Valeria Sequino (15 and 2),
Luciano Errico (15 and 2), Lucia Trozzo (2), Jim Palfreyman (5), James W.
McKee (6 and 7), Bradley W. Meyers (8), Ingrid Stairs (9), Lucas Guillemot
(10 and 11), Ism... | Search for gravitational wave signals from known pulsars in LIGO-Virgo
O3 data using the 5n-vector ensemble method | null | Phys. Rev. D 108, 122002 , Published 4 December 2023 | 10.1103/PhysRevD.108.122002 | null | gr-qc physics.data-an | http://creativecommons.org/licenses/by/4.0/ | The 5n-vector ensemble method is a multiple test for the targeted search of
continuous gravitational waves from an ensemble of known pulsars. This method
can improve the detection probability combining the results from individually
undetectable pulsars if few signals are near the detection threshold. In this
paper, w... | [
{
"created": "Tue, 14 Nov 2023 15:09:23 GMT",
"version": "v1"
}
] | 2024-01-04 | [
[
"D'Onofrio",
"Luca",
"",
"15 and 2"
],
[
"De Rosa",
"Rosario",
"",
"15 and 2"
],
[
"Palomba",
"Cristiano",
"",
"1 and 3"
],
[
"Leaci",
"Paola",
"",
"1 and 3"
],
[
"Piccinni",
"Ornella J.",
"",
"15 and 2"
],
[
"... | The 5n-vector ensemble method is a multiple test for the targeted search of continuous gravitational waves from an ensemble of known pulsars. This method can improve the detection probability combining the results from individually undetectable pulsars if few signals are near the detection threshold. In this paper, we ... |
2310.09829 | Anas El Balali | Anas El Balali | Quantum Schwarzschild Black Hole Optical Aspects | 27 pages, 7 figures, Accepted for publication in Gravitation and
Cosmology | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | In this paper, we investigate the optical behaviors of a quantum
Schwarzschild black hole with a spacetime solution including a parameter
$\lambda$ that encodes its discretization. Concretly, we derive the effective
potential of such solution. In particular, we study the circular orbits around
the quantum black hole.... | [
{
"created": "Sun, 15 Oct 2023 13:25:08 GMT",
"version": "v1"
}
] | 2023-10-17 | [
[
"Balali",
"Anas El",
""
]
] | In this paper, we investigate the optical behaviors of a quantum Schwarzschild black hole with a spacetime solution including a parameter $\lambda$ that encodes its discretization. Concretly, we derive the effective potential of such solution. In particular, we study the circular orbits around the quantum black hole. I... |
gr-qc/0302005 | Mahmut Hortacsu | M. Hortacsu, H. T. Ozcelik, B. Yapiskan | Properties of Solutions in 2+1 Dimensions | 16 pages, 1 figures, PlainTeX, Dedicated to Prof. Yavuz Nutku on his
60th birthday. References added | Gen.Rel.Grav. 35 (2003) 1209-1221 | 10.1023/A:1024445724029 | null | gr-qc | null | We solve the Einstein equations for the 2+1 dimensions with and without
scalar fields. We calculate the entropy, Hawking temperature and the emission
probabilities for these cases. We also compute the Newman-Penrose coefficients
for different solutions and compare them.
| [
{
"created": "Mon, 3 Feb 2003 10:56:59 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Feb 2003 12:38:26 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Hortacsu",
"M.",
""
],
[
"Ozcelik",
"H. T.",
""
],
[
"Yapiskan",
"B.",
""
]
] | We solve the Einstein equations for the 2+1 dimensions with and without scalar fields. We calculate the entropy, Hawking temperature and the emission probabilities for these cases. We also compute the Newman-Penrose coefficients for different solutions and compare them. |
1512.06252 | Marko Vojinovic | Aleksandar Mikovic, Marko Vojinovic | Categorical generalization of spinfoam models | Proceedings of the QQQ conference, Tallinn, Estonia, 2012. 10 pages | J. Phys.: Conf. Ser. 532, 012020 (2014) | 10.1088/1742-6596/532/1/012020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a brief review of the problem of quantum gravity. After the
discussion of the nonrenormalizability of general relativity, we briefly
mention the main research directions which aim to resolve this problem. Our
attention then focuses on the approach of Loop Quantum Gravity, specifically
spinfoam models. These m... | [
{
"created": "Sat, 19 Dec 2015 14:06:24 GMT",
"version": "v1"
}
] | 2015-12-22 | [
[
"Mikovic",
"Aleksandar",
""
],
[
"Vojinovic",
"Marko",
""
]
] | We give a brief review of the problem of quantum gravity. After the discussion of the nonrenormalizability of general relativity, we briefly mention the main research directions which aim to resolve this problem. Our attention then focuses on the approach of Loop Quantum Gravity, specifically spinfoam models. These mod... |
1512.05729 | Matt Visser | Matt Visser (Victoria University of Wellington) | Buchert coarse-graining and the classical energy conditions | 6 Pages; contribution to the MG14 conference - Rome 2015; V2:
Significant changes. One key inequality now proved, (not on the basis of
usual averaging arguments), but on the basis of the Cauchy-Schwarz
inequality. The trace of the effective stress-energy can be non-zero and of
either sign. The effective stress-... | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | So-called "Buchert averaging" is actually a coarse-graining procedure, where
fine detail is "smeared out" due to limited spatio-temporal resolution. For
technical reasons, (to be explained herein), "averaging" is not really an
appropriate term, and I shall consistently describe the process as a
"coarse-graining". Bec... | [
{
"created": "Thu, 17 Dec 2015 19:20:37 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jan 2016 19:01:16 GMT",
"version": "v2"
}
] | 2016-01-08 | [
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | So-called "Buchert averaging" is actually a coarse-graining procedure, where fine detail is "smeared out" due to limited spatio-temporal resolution. For technical reasons, (to be explained herein), "averaging" is not really an appropriate term, and I shall consistently describe the process as a "coarse-graining". Becau... |
1111.4228 | Mario Novello | M. Novello and E. Bittencourt | The gravitational mechanism to generate mass II | This is the further development of previous article (The
gravitational mechanism to generate mass, arXiv:1008.2371) which appeared in
Classical and Quantum Gravity 28 (2011) 035003 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the eminent confirmation or disproof of the existence of Higgs boson by
experiments on the LHC it is time to analyze in a non-dogmatic way the
suggestions to understand the origin of the mass. Here we analyze the recent
proposal according to which gravity is what is really responsible for the
generation of mass ... | [
{
"created": "Wed, 16 Nov 2011 13:37:40 GMT",
"version": "v1"
}
] | 2011-11-21 | [
[
"Novello",
"M.",
""
],
[
"Bittencourt",
"E.",
""
]
] | With the eminent confirmation or disproof of the existence of Higgs boson by experiments on the LHC it is time to analyze in a non-dogmatic way the suggestions to understand the origin of the mass. Here we analyze the recent proposal according to which gravity is what is really responsible for the generation of mass of... |
2303.00139 | Vladimir Ivashchuk | V. D. Ivashchuk, K. K. Ernazarov and A. A. Kobtsev | Exact $(1 + 3 + 6)$-dimensional cosmological-type solutions in
gravitational model with Yang-Mills field, Gauss-Bonnet term and
$\Lambda$-term | 17 pages, 3 figures, LaTex, Revised version: 3 paragraphs are added
into Introduction, new references are included and few references
(self-citations) are omitted | Symmetry, 15 (4), 783 (2023) | 10.3390/sym15040783 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider $10$-dimensional gravitational model with $SO(6)$ Yang-Mills
field, Gauss-Bonnet term and $\Lambda$-term. We study so-called cosmological
type solutions defined on product manifold $M = R \times R^3 \times K$, where
$K$ is $6d$ Calabi-Yau manifold. By putting the gauge field 1-form to be
coinciding with 1... | [
{
"created": "Wed, 1 Mar 2023 00:12:49 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Mar 2023 20:56:05 GMT",
"version": "v2"
}
] | 2023-03-28 | [
[
"Ivashchuk",
"V. D.",
""
],
[
"Ernazarov",
"K. K.",
""
],
[
"Kobtsev",
"A. A.",
""
]
] | We consider $10$-dimensional gravitational model with $SO(6)$ Yang-Mills field, Gauss-Bonnet term and $\Lambda$-term. We study so-called cosmological type solutions defined on product manifold $M = R \times R^3 \times K$, where $K$ is $6d$ Calabi-Yau manifold. By putting the gauge field 1-form to be coinciding with 1-f... |
1702.00095 | Alexander Tolish | David Garfinkle, Stefan Hollands, Akihiro Ishibashi, Alexander Tolish,
and Robert M. Wald | The Memory Effect for Particle Scattering in Even Spacetime Dimensions | 14 pages. Typos corrected, reference added, eq. (11) corrected and
clarified (results unchanged), arguments in secs. IV,V revised (results
unchanged) | Class. Quantum Grav. 34, 145015 (2017) | 10.1088/1361-6382/aa777b | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explicitly calculate the gravitational wave memory effect for classical
point particle sources in linearized gravity off of an even dimensional
Minkowski background. We show that there is no memory effect in $d>4$
dimensions, in agreement with the general analysis of Hollands, Ishibashi, and
Wald (2016).
| [
{
"created": "Wed, 1 Feb 2017 00:44:17 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Jun 2017 19:17:15 GMT",
"version": "v2"
}
] | 2017-07-04 | [
[
"Garfinkle",
"David",
""
],
[
"Hollands",
"Stefan",
""
],
[
"Ishibashi",
"Akihiro",
""
],
[
"Tolish",
"Alexander",
""
],
[
"Wald",
"Robert M.",
""
]
] | We explicitly calculate the gravitational wave memory effect for classical point particle sources in linearized gravity off of an even dimensional Minkowski background. We show that there is no memory effect in $d>4$ dimensions, in agreement with the general analysis of Hollands, Ishibashi, and Wald (2016). |
2006.13545 | Seiji Kawamura | Seiji Kawamura, Masaki Ando, Naoki Seto, Shuichi Sato, Mitsuru Musha,
Isao Kawano, Jun'ichi Yokoyama, Takahiro Tanaka, Kunihito Ioka, Tomotada
Akutsu, Takeshi Takashima, Kazuhiro Agatsuma, Akito Araya, Naoki Aritomi,
Hideki Asada, Takeshi Chiba, Satoshi Eguchi, Motohiro Enoki, Masa-Katsu
Fujimoto, Ryuichi Fujit... | Current status of space gravitational wave antenna DECIGO and B-DECIGO | 10 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Deci-hertz Interferometer Gravitational Wave Observatory (DECIGO) is the
future Japanese space mission with a frequency band of 0.1 Hz to 10 Hz. DECIGO
aims at the detection of primordial gravitational waves, which could be
produced during the inflationary period right after the birth of the universe.
There are many ... | [
{
"created": "Wed, 24 Jun 2020 08:08:18 GMT",
"version": "v1"
}
] | 2020-06-25 | [
[
"Kawamura",
"Seiji",
""
],
[
"Ando",
"Masaki",
""
],
[
"Seto",
"Naoki",
""
],
[
"Sato",
"Shuichi",
""
],
[
"Musha",
"Mitsuru",
""
],
[
"Kawano",
"Isao",
""
],
[
"Yokoyama",
"Jun'ichi",
""
],
[
"Tana... | Deci-hertz Interferometer Gravitational Wave Observatory (DECIGO) is the future Japanese space mission with a frequency band of 0.1 Hz to 10 Hz. DECIGO aims at the detection of primordial gravitational waves, which could be produced during the inflationary period right after the birth of the universe. There are many ot... |
gr-qc/0411110 | Carles Bona | C. Bona, T. Ledvinka, C. Palenzuela-Luque and M. Zacek | Constraint-preserving boundary conditions in the Z4 Numerical Relativity
formalism | Enhanced version, including a new Appendix on maximally dissipative
boundary conditions (12 pages, 5 figures) | Class.Quant.Grav. 22 (2005) 2615-2634 | 10.1088/0264-9381/22/13/007 | null | gr-qc | null | The constraint-preserving approach, which aim is to provide consistent
boundary conditions for Numerical Relativity simulations, is discussed in
parallel with other recent developments. The case of the Z4 system is
considered, and constraint-preserving boundary conditions of the Sommerfeld
type are provided. A necess... | [
{
"created": "Tue, 23 Nov 2004 08:36:18 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Dec 2004 19:40:37 GMT",
"version": "v2"
},
{
"created": "Tue, 14 Jun 2005 08:53:18 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Bona",
"C.",
""
],
[
"Ledvinka",
"T.",
""
],
[
"Palenzuela-Luque",
"C.",
""
],
[
"Zacek",
"M.",
""
]
] | The constraint-preserving approach, which aim is to provide consistent boundary conditions for Numerical Relativity simulations, is discussed in parallel with other recent developments. The case of the Z4 system is considered, and constraint-preserving boundary conditions of the Sommerfeld type are provided. A necessar... |
1107.4115 | M. C. Bertin | M. C. Bertin, B. M. Pimentel, C. E. Valc\'arcel, G. E. R. Zambrano | Hamilton-Jacobi formalism for Linearized Gravity | To be published in Classical and Quantum Gravity | Class.Quant.Grav.28:175015,2011 | 10.1088/0264-9381/28/17/175015 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study the theory of linearized gravity via the
Hamilton-Jacobi formalism. We make a brief review of this theory and its
Lagrangian description, as well as a review of the Hamilton-Jacobi approach for
singular systems. Then we apply this formalism to analyze the constraint
structure of the linearized g... | [
{
"created": "Wed, 20 Jul 2011 20:31:00 GMT",
"version": "v1"
}
] | 2011-08-22 | [
[
"Bertin",
"M. C.",
""
],
[
"Pimentel",
"B. M.",
""
],
[
"Valcárcel",
"C. E.",
""
],
[
"Zambrano",
"G. E. R.",
""
]
] | In this work we study the theory of linearized gravity via the Hamilton-Jacobi formalism. We make a brief review of this theory and its Lagrangian description, as well as a review of the Hamilton-Jacobi approach for singular systems. Then we apply this formalism to analyze the constraint structure of the linearized gra... |
gr-qc/0305006 | Tsutomu Kobayashi | Tsutomu Kobayashi, Hideaki Kudoh, Takahiro Tanaka | Primordial gravitational waves in inflationary braneworld | 16 pages, 4 figures, typos corrected | Phys.Rev. D68 (2003) 044025 | 10.1103/PhysRevD.68.044025 | KUNS-1842, YITP-03-23 | gr-qc hep-th | null | We study primordial gravitational waves from inflation in Randall-Sundrum
braneworld model. The effect of small change of the Hubble parameter during
inflation is investigated using a toy model given by connecting two de Sitter
branes. We analyze the power spectrum of final zero-mode gravitons, which is
generated fro... | [
{
"created": "Fri, 2 May 2003 10:43:25 GMT",
"version": "v1"
},
{
"created": "Sun, 11 May 2003 12:08:20 GMT",
"version": "v2"
},
{
"created": "Fri, 21 Nov 2003 12:17:37 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Kobayashi",
"Tsutomu",
""
],
[
"Kudoh",
"Hideaki",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | We study primordial gravitational waves from inflation in Randall-Sundrum braneworld model. The effect of small change of the Hubble parameter during inflation is investigated using a toy model given by connecting two de Sitter branes. We analyze the power spectrum of final zero-mode gravitons, which is generated from ... |
2301.10465 | Ryotaku Suzuki | Kenshin Isomura, Ryotaku Suzuki and Shinya Tomizawa | Particle motions around regular black holes | 19 pages, 8 figures; v2: analysis of photon orbits improved, refs
added, 21 pages; v3: published version, fixed minor typos, fixed figures, 20
pages | null | 10.1103/PhysRevD.107.084003 | TTI-MATHPHYS-19 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the bound orbits of massive/massless, neutral particles and
photons moving around regular black holes of Fan and Wang. For massive
particles, we show the existence of stable/unstable circular orbits and the
charge dependence of the radius of the innermost stable circular orbit.
Remarkably, we find an u... | [
{
"created": "Wed, 25 Jan 2023 08:51:18 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Feb 2023 12:32:47 GMT",
"version": "v2"
},
{
"created": "Fri, 24 Mar 2023 06:06:37 GMT",
"version": "v3"
}
] | 2023-04-19 | [
[
"Isomura",
"Kenshin",
""
],
[
"Suzuki",
"Ryotaku",
""
],
[
"Tomizawa",
"Shinya",
""
]
] | We investigate the bound orbits of massive/massless, neutral particles and photons moving around regular black holes of Fan and Wang. For massive particles, we show the existence of stable/unstable circular orbits and the charge dependence of the radius of the innermost stable circular orbit. Remarkably, we find an uns... |
gr-qc/0312008 | Jose Geraldo Pereira | R. Aldrovandi, J. G. Pereira, K. H. Vu | Selected Topics in Teleparallel Gravity | RevTeX4, 7 pages, 2 eps figures. Talk presented at the "24th National
Meeting of the Brazilian Physical Society", section Particles and Fields,
Caxambu MG, Brazil, from September/30 to October/04/2003 | Braz.J.Phys.34:1374-1380,2004 | null | null | gr-qc hep-th | null | Teleparallel gravity can be seen as a gauge theory for the translation group.
As such, its fundamental field is neither the tetrad nor the metric, but a
gauge potential assuming values in the Lie algebra of the translation group.
This gauge character makes of teleparallel gravity, despite its equivalence to
general r... | [
{
"created": "Mon, 1 Dec 2003 16:12:01 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Aldrovandi",
"R.",
""
],
[
"Pereira",
"J. G.",
""
],
[
"Vu",
"K. H.",
""
]
] | Teleparallel gravity can be seen as a gauge theory for the translation group. As such, its fundamental field is neither the tetrad nor the metric, but a gauge potential assuming values in the Lie algebra of the translation group. This gauge character makes of teleparallel gravity, despite its equivalence to general rel... |
gr-qc/0007081 | Toshiharu Kawai | Toshiharu Kawai | Energy-momentum and angular momentum densities in gauge theories of
gravity | 18 pages | Phys.Rev. D62 (2000) 104014 | 10.1103/PhysRevD.62.104014 | null | gr-qc | null | In the $\bar{\mbox{\rm Poincar\'{e}}}$ gauge theory of gravity, which has
been formulated on the basis of a principal fiber bundle over the space-time
manifold having the covering group of the proper orthochronous Poincar\'{e}
group as the structure group, we examine the tensorial properties of the
dynamical energy-m... | [
{
"created": "Mon, 31 Jul 2000 04:28:07 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Sep 2000 02:40:57 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Kawai",
"Toshiharu",
""
]
] | In the $\bar{\mbox{\rm Poincar\'{e}}}$ gauge theory of gravity, which has been formulated on the basis of a principal fiber bundle over the space-time manifold having the covering group of the proper orthochronous Poincar\'{e} group as the structure group, we examine the tensorial properties of the dynamical energy-mom... |
0704.2243 | Clifford M. Will | Thomas Mitchell and Clifford M. Will (Washington University, St.
Louis) | Post-Newtonian gravitational radiation and equations of motion via
direct integration of the relaxed Einstein equations. V. Evidence for the
strong equivalence principle to second post-Newtonian order | 14 pages, submitted to Phys. Rev. D; small changes to coincide with
published version | Phys.Rev.D75:124025,2007 | 10.1103/PhysRevD.75.124025 | null | gr-qc | null | Using post-Newtonian equations of motion for fluid bodies valid to the second
post-Newtonian order, we derive the equations of motion for binary systems with
finite-sized, non-spinning but arbitrarily shaped bodies. In particular we
study the contributions of the internal structure of the bodies (such as
self-gravity... | [
{
"created": "Tue, 17 Apr 2007 21:51:04 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Jul 2007 13:48:45 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Mitchell",
"Thomas",
"",
"Washington University, St.\n Louis"
],
[
"Will",
"Clifford M.",
"",
"Washington University, St.\n Louis"
]
] | Using post-Newtonian equations of motion for fluid bodies valid to the second post-Newtonian order, we derive the equations of motion for binary systems with finite-sized, non-spinning but arbitrarily shaped bodies. In particular we study the contributions of the internal structure of the bodies (such as self-gravity) ... |
gr-qc/0201041 | Sanjay M. Wagh | Sanjay M. Wagh | Classical formulation of Cosmic Censorship Hypothesis | Revtex4, No figures, Replaced to match submitted version, New
Discussion and reference added. Conclusions unchanged | null | null | null | gr-qc astro-ph hep-th physics.class-ph | null | Spacetimes admitting appropriate spatial homothetic Killing vectors are
called spatially homothetic spacetimes. Such spacetimes conform to the fact
that gravity has no length-scale for matter inhomogeneities. The matter density
for such spacetimes is (spatially) arbitrary and the matter generating the
spacetime admit... | [
{
"created": "Sun, 13 Jan 2002 03:40:05 GMT",
"version": "v1"
},
{
"created": "Sun, 3 Feb 2002 05:48:35 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Wagh",
"Sanjay M.",
""
]
] | Spacetimes admitting appropriate spatial homothetic Killing vectors are called spatially homothetic spacetimes. Such spacetimes conform to the fact that gravity has no length-scale for matter inhomogeneities. The matter density for such spacetimes is (spatially) arbitrary and the matter generating the spacetime admits ... |
1805.05023 | Yun Soo Myung | Yun Soo Myung, De-Cheng Zou | Gregory-Laflamme instability of black hole in
Einstein-scalar-Gauss-Bonnet theories | 14 pages, 4 figures, version to appear in Physical Review D | Phys. Rev. D 98, 024030 (2018) | 10.1103/PhysRevD.98.024030 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the stability analysis of Schwarzschild black hole in
Einstein-scalar-Gauss-Bonnet (ESGB) theory because the instability of
Schwarzschild black hole without scalar hair implies the Gauss-Bonnet black
hole with scalar hair. The linearized scalar equation is compared to the
Lichnerowicz-Ricci tensor equa... | [
{
"created": "Mon, 14 May 2018 06:31:39 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Jul 2018 23:57:28 GMT",
"version": "v2"
}
] | 2018-07-25 | [
[
"Myung",
"Yun Soo",
""
],
[
"Zou",
"De-Cheng",
""
]
] | We investigate the stability analysis of Schwarzschild black hole in Einstein-scalar-Gauss-Bonnet (ESGB) theory because the instability of Schwarzschild black hole without scalar hair implies the Gauss-Bonnet black hole with scalar hair. The linearized scalar equation is compared to the Lichnerowicz-Ricci tensor equati... |
gr-qc/9902031 | Manfred Requardt | Manfred Requardt | Space-Time as an Orderparameter Manifold in Random Networks and the
Emergence of Physical Points | 40 pages, Latex | null | null | null | gr-qc hep-th math-ph math.MP | null | In the following we are going to describe how macroscopic space-time is
supposed to emerge as an orderparameter manifold or superstructure floating in
a stochastic discrete network structure. As in preceeding work (mentioned
below), our analysis is based on the working philosophy that both physics and
the correspondi... | [
{
"created": "Thu, 11 Feb 1999 09:57:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Requardt",
"Manfred",
""
]
] | In the following we are going to describe how macroscopic space-time is supposed to emerge as an orderparameter manifold or superstructure floating in a stochastic discrete network structure. As in preceeding work (mentioned below), our analysis is based on the working philosophy that both physics and the corresponding... |
1809.06192 | Astrid Eichhorn | Astrid Eichhorn, Sumati Surya and Fleur Versteegen | Induced Spatial Geometry from Causal Structure | 38 pages, 24 figures | null | 10.1088/1361-6382/ab114b | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the Hawking-King-McCarthy-Malament (HKMM) theorem and the
associated reconstruction of spacetime geometry from its causal structure
$(M,\prec)$ and local volume element $\epsilon$, we define a one-parameter
family of spatial distance functions on a Cauchy hypersurface $\Sigma$ using
only $(M,\prec)$ and ... | [
{
"created": "Mon, 17 Sep 2018 13:34:01 GMT",
"version": "v1"
}
] | 2019-05-22 | [
[
"Eichhorn",
"Astrid",
""
],
[
"Surya",
"Sumati",
""
],
[
"Versteegen",
"Fleur",
""
]
] | Motivated by the Hawking-King-McCarthy-Malament (HKMM) theorem and the associated reconstruction of spacetime geometry from its causal structure $(M,\prec)$ and local volume element $\epsilon$, we define a one-parameter family of spatial distance functions on a Cauchy hypersurface $\Sigma$ using only $(M,\prec)$ and $\... |
gr-qc/0009012 | Lee Samuel Finn | Lee Samuel Finn and Soma Mukherjee | Data conditioning for gravitational wave detectors: A Kalman filter for
regressing suspension violin mode | REVTeX; 42 pages, incl. 14 figures, 4 tables | Phys.Rev.D63:062004,2001; Erratum-ibid.D67:109902,2003 | 10.1103/PhysRevD.63.062004 10.1103/PhysRevD.67.109902 | null | gr-qc | null | Interferometric gravitational wave detectors operate by sensing the
differential light travel time between free test masses. Correspondingly, they
are sensitive to anything that changes the physical distance between the test
masses, including physical motion of the masses themselves. In ground-based
detectors the tes... | [
{
"created": "Tue, 5 Sep 2000 13:23:17 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Finn",
"Lee Samuel",
""
],
[
"Mukherjee",
"Soma",
""
]
] | Interferometric gravitational wave detectors operate by sensing the differential light travel time between free test masses. Correspondingly, they are sensitive to anything that changes the physical distance between the test masses, including physical motion of the masses themselves. In ground-based detectors the test ... |
1012.2070 | Alexis Larranaga PhD | Alexis Larranaga, Sindy Mojica | Geometrothermodynamics of a Charged Black Hole of String Theory | 10 pages | Brazilian Journal of Physics 41,2: 154-158 (2011) | 10.1007/s13538-011-0015-4 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The thermodynamics of the Gibbons-Maeda-Garfinkle-Horowitz-Strominger (GMGHS)
charged black hole from string theory is reformulated within the context of the
recently developed formalism of geometrothermodynamics. The geometry of the
space of equilibrium states is curved, but we show that the thermodynamic
curvature ... | [
{
"created": "Thu, 9 Dec 2010 18:32:39 GMT",
"version": "v1"
}
] | 2011-09-02 | [
[
"Larranaga",
"Alexis",
""
],
[
"Mojica",
"Sindy",
""
]
] | The thermodynamics of the Gibbons-Maeda-Garfinkle-Horowitz-Strominger (GMGHS) charged black hole from string theory is reformulated within the context of the recently developed formalism of geometrothermodynamics. The geometry of the space of equilibrium states is curved, but we show that the thermodynamic curvature do... |
0909.2223 | Carlos Coimbra-Araujo | P. S. Letelier and C. H. Coimbra-Araujo | Gravity with extra dimensions and dark matter interpretation:
Phenomenological example via Miyamoto-Nagai galaxy | 10 pages, 10 figures, submitted to Brazilian Journal of Physics | null | 10.1007/s13538-012-0059-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A configuration whose density profile coincides with the Newtonian potential
for spiral galaxies is constructed from a 4D isotropic metric plus extra
dimensional components. A Miyamoto-Nagai ansatz is used to solve Einstein
equations. The stable rotation curves of such system are computed and, without
fitting techniq... | [
{
"created": "Fri, 11 Sep 2009 17:34:55 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Sep 2011 10:40:54 GMT",
"version": "v2"
}
] | 2015-05-14 | [
[
"Letelier",
"P. S.",
""
],
[
"Coimbra-Araujo",
"C. H.",
""
]
] | A configuration whose density profile coincides with the Newtonian potential for spiral galaxies is constructed from a 4D isotropic metric plus extra dimensional components. A Miyamoto-Nagai ansatz is used to solve Einstein equations. The stable rotation curves of such system are computed and, without fitting technique... |
gr-qc/9801093 | G. Dautcourt | G. Dautcourt | On the Ultrarelativistic Limit of General Relativity | 9 pages, Latex, submitted to Acta Physica Polonica (Jadwisin
Conference Proceedings) | Acta Phys.Polon. B29 (1998) 1047-1055 | null | null | gr-qc | null | As is well-known, Newton's gravitational theory can be formulated as a
four-dimensional space-time theory and follows as singular limit from
Einstein's theory, if the velocity of light tends to the infinity. Here
'singular' stands for the fact, that the limiting geometrical structure differs
from a regular Riemannian... | [
{
"created": "Wed, 28 Jan 1998 21:16:38 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Dautcourt",
"G.",
""
]
] | As is well-known, Newton's gravitational theory can be formulated as a four-dimensional space-time theory and follows as singular limit from Einstein's theory, if the velocity of light tends to the infinity. Here 'singular' stands for the fact, that the limiting geometrical structure differs from a regular Riemannian s... |
1906.07033 | Sebastian Bramberger | Sebastian F. Bramberger, Mariam Chitishvili, George Lavrelashvili | Aspects of the negative mode problem in quantum tunneling with gravity | 16 pages, 8 figures | Phys. Rev. D 100, 125006 (2019) | 10.1103/PhysRevD.100.125006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some solutions describing vacuum decay exhibit a catastrophic instability.
This, so-called negative mode problem in quantum tunneling with gravity, was
discovered 34 years ago and in spite of the fact that in these years many
different groups worked on this topic, it has still not been resolved. Here, we
briefly summ... | [
{
"created": "Mon, 17 Jun 2019 13:45:18 GMT",
"version": "v1"
}
] | 2019-12-11 | [
[
"Bramberger",
"Sebastian F.",
""
],
[
"Chitishvili",
"Mariam",
""
],
[
"Lavrelashvili",
"George",
""
]
] | Some solutions describing vacuum decay exhibit a catastrophic instability. This, so-called negative mode problem in quantum tunneling with gravity, was discovered 34 years ago and in spite of the fact that in these years many different groups worked on this topic, it has still not been resolved. Here, we briefly summar... |
1810.11785 | Matteo Luca Ruggiero | Matteo Luca Ruggiero, Angelo Tartaglia | Test of gravitomagnetism with satellites around the Earth | 6 pages, 3 figures; revised to match the version accepted for
publication in EPJP | Eur. Phys. J. Plus (2019) 134: 205 | 10.1140/epjp/i2019-12602-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We focus on the possibility of measuring the gravitomagnetic effects due to
the rotation of the Earth, by means of a space-based experiment that exploits
satellites in geostationary orbits. Due to the rotation of the Earth, there is
an asymmetry in the propagation of electromagnetic signals in opposite
directions alo... | [
{
"created": "Sun, 28 Oct 2018 09:35:12 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Jan 2019 18:26:22 GMT",
"version": "v2"
},
{
"created": "Sun, 3 Mar 2019 21:03:07 GMT",
"version": "v3"
}
] | 2019-05-21 | [
[
"Ruggiero",
"Matteo Luca",
""
],
[
"Tartaglia",
"Angelo",
""
]
] | We focus on the possibility of measuring the gravitomagnetic effects due to the rotation of the Earth, by means of a space-based experiment that exploits satellites in geostationary orbits. Due to the rotation of the Earth, there is an asymmetry in the propagation of electromagnetic signals in opposite directions along... |
2402.11315 | Eric Ling | Gregory J. Galloway and Eric Ling | Rigidity aspects of Penrose's singularity theorem | 16 pages. v2: minor corrections/changes and expanded proof of Theorem
8 | null | null | CPH-GEOTOP-DNRF151; CF21-0680 | gr-qc math.DG | http://creativecommons.org/licenses/by/4.0/ | In this paper, we study rigidity aspects of Penrose's singularity theorem.
Specifically, we aim to answer the following question: if a spacetime satisfies
the hypotheses of Penrose's singularity theorem except with weakly trapped
surfaces instead of trapped surfaces, then what can be said about the global
spacetime s... | [
{
"created": "Sat, 17 Feb 2024 16:00:21 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Apr 2024 15:20:10 GMT",
"version": "v2"
}
] | 2024-04-30 | [
[
"Galloway",
"Gregory J.",
""
],
[
"Ling",
"Eric",
""
]
] | In this paper, we study rigidity aspects of Penrose's singularity theorem. Specifically, we aim to answer the following question: if a spacetime satisfies the hypotheses of Penrose's singularity theorem except with weakly trapped surfaces instead of trapped surfaces, then what can be said about the global spacetime str... |
gr-qc/9506074 | Robert Graham | Andras Csordas and Robert Graham | Hartle-Hawking state in supersymmetric minisuperspace | 11 pages, revtex | Phys.Lett. B373 (1996) 51-55 | 10.1016/0370-2693(96)00098-6 | null | gr-qc | null | The Hartle-Hawking `no-boundary' state is constructed explicitly for the
recently developed supersymmetric minisuperspace model with non-vanishing
fermion number.
| [
{
"created": "Thu, 29 Jun 1995 10:54:07 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Csordas",
"Andras",
""
],
[
"Graham",
"Robert",
""
]
] | The Hartle-Hawking `no-boundary' state is constructed explicitly for the recently developed supersymmetric minisuperspace model with non-vanishing fermion number. |
1802.03465 | Edward Anderson | Edward Anderson | Monopoles of Twelve Types in 3-Body Problems | 39 pages including 23 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider twelve different ways of modelling the 3-body problem in
dimension $\geq 2$. These can be viewed as models of classical and quantum
background independence. We show that a different type of monopole is realized
in each's relational space: a type of reduced configuration space. 8 cases
occur in 2-$d$, and ... | [
{
"created": "Fri, 9 Feb 2018 22:06:47 GMT",
"version": "v1"
}
] | 2018-02-13 | [
[
"Anderson",
"Edward",
""
]
] | We consider twelve different ways of modelling the 3-body problem in dimension $\geq 2$. These can be viewed as models of classical and quantum background independence. We show that a different type of monopole is realized in each's relational space: a type of reduced configuration space. 8 cases occur in 2-$d$, and 4 ... |
gr-qc/9405015 | Chopin Soo | Lee Smolin and Chopin Soo | The Chern-Simons Invariant as the Natural Time Variable for Classical
and Quantum Cosmology | 32 pages, gr-qc/9405015, CGPG-94/4-1 (revised and extended, Oct. 94) | Nucl.Phys.B449:289-316,1995 | 10.1016/0550-3213(95)00222-E | null | gr-qc hep-th | null | We propose that the Chern-Simons invariant of the Ashtekar-Sen connection is
the natural internal time coordinate for classical and quantum cosmology. The
reasons for this are a number of interesting properties of this functional,
which we describe here. 1)It is a function on the gauge and diffeomorphism
invariant co... | [
{
"created": "Fri, 6 May 1994 18:52:59 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Oct 1994 19:52:55 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Smolin",
"Lee",
""
],
[
"Soo",
"Chopin",
""
]
] | We propose that the Chern-Simons invariant of the Ashtekar-Sen connection is the natural internal time coordinate for classical and quantum cosmology. The reasons for this are a number of interesting properties of this functional, which we describe here. 1)It is a function on the gauge and diffeomorphism invariant conf... |
gr-qc/9307015 | Kristin Schleich | Kristin Schleich and Donald M. Witt | Generalized Sums over Histories for Quantum Gravity I. Smooth Conifolds | 81pp., plain TeX, To appear in Nucl. Phys. B | Nucl.Phys.B402:411-468,1993 | 10.1016/0550-3213(93)90649-A | null | gr-qc hep-th | null | This paper proposes to generalize the histories included in Euclidean
functional integrals from manifolds to a more general set of compact
topological spaces. This new set of spaces, called conifolds, includes
nonmanifold stationary points that arise naturally in a semiclasssical
evaluation of such integrals; additio... | [
{
"created": "Tue, 13 Jul 1993 22:38:00 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Schleich",
"Kristin",
""
],
[
"Witt",
"Donald M.",
""
]
] | This paper proposes to generalize the histories included in Euclidean functional integrals from manifolds to a more general set of compact topological spaces. This new set of spaces, called conifolds, includes nonmanifold stationary points that arise naturally in a semiclasssical evaluation of such integrals; additiona... |
gr-qc/9803067 | Murat Ozer | A. A. Al-Nowaiser, Murat \"Ozer and M. O. Taha | A Non-Singular Universe in String Cosmology | RevTex, 10 pages, a new reference and related information is added | Int.J.Mod.Phys.D8:43-49,1999 | 10.1142/S0218271899000055 | null | gr-qc astro-ph hep-ph | null | We consider the low-energy effective string action in four dimensions
including the leading order-$\alpha'$ terms. An exact homogeneous solution is
obtained. It represents a non-singular expanding cosmological model in which
the tensor fields tend to vanish as $t\to \infty$. The scale factor $a(t)$ of
the very early ... | [
{
"created": "Wed, 18 Mar 1998 19:19:07 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Mar 1998 14:11:37 GMT",
"version": "v2"
},
{
"created": "Sun, 22 Mar 1998 07:08:24 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Al-Nowaiser",
"A. A.",
""
],
[
"Özer",
"Murat",
""
],
[
"Taha",
"M. O.",
""
]
] | We consider the low-energy effective string action in four dimensions including the leading order-$\alpha'$ terms. An exact homogeneous solution is obtained. It represents a non-singular expanding cosmological model in which the tensor fields tend to vanish as $t\to \infty$. The scale factor $a(t)$ of the very early un... |
2002.03787 | Sunil Kumar Tripathy Dr. | S K Tripathy, B Mishra, Saibal Ray and Rikpratik Sengupta | Bouncing Models in an Extended Gravity Theory | 14 pages,13 figures | Chinese Journal of Physics 71 (2021) 610 | 10.1016/j.cjph.2021.03.026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some bouncing models are investigated in the framework of an extended theory
of gravity. The extended gravity model is a simple extension of the General
Relativity where an additional matter geometry coupling is introduced to
account for the late time cosmic speed up phenomena. The dynamics of the models
are discusse... | [
{
"created": "Thu, 6 Feb 2020 11:03:42 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Sep 2020 17:05:21 GMT",
"version": "v2"
}
] | 2021-06-10 | [
[
"Tripathy",
"S K",
""
],
[
"Mishra",
"B",
""
],
[
"Ray",
"Saibal",
""
],
[
"Sengupta",
"Rikpratik",
""
]
] | Some bouncing models are investigated in the framework of an extended theory of gravity. The extended gravity model is a simple extension of the General Relativity where an additional matter geometry coupling is introduced to account for the late time cosmic speed up phenomena. The dynamics of the models are discussed ... |
gr-qc/0203008 | Ivan L. Zhogin | I. L. Zhogin | Trilinear generally covariant equations of AP | 8 pages, Latex. Corrected typos (e.g., in Eqs.(5), (26)) | Sov.Phys.J. 34 (1991) 105-110 | null | null | gr-qc | null | Field equations for n-frames h_a{}^\mu that are possible in the theory of
absolute parallelism (AP) are considered. The methods of compatibility (or
formal integrability) theory enable us to find the non-Lagrangian equation
having unusual kind of compatibility conditions, guaranteed by two (not one)
identities. This ... | [
{
"created": "Mon, 4 Mar 2002 06:25:22 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Sep 2002 09:48:01 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Zhogin",
"I. L.",
""
]
] | Field equations for n-frames h_a{}^\mu that are possible in the theory of absolute parallelism (AP) are considered. The methods of compatibility (or formal integrability) theory enable us to find the non-Lagrangian equation having unusual kind of compatibility conditions, guaranteed by two (not one) identities. This 'u... |
gr-qc/9403055 | Don N. Page | Sheldon Goldstein (Rutgers University) and Don N. Page (University of
Alberta) | Linearly Positive Histories: Probabilities for a Robust Family of
Sequences of Quantum Events | 8 pages, LaTeX. Shortened slightly to permit publication in Phys.
Rev. Lett. A paragraph after Eq. (21) was expanded | Phys.Rev.Lett.74:3715-3719,1995 | 10.1103/PhysRevLett.74.3715 | Alberta-Thy-43-93 | gr-qc hep-th | null | Nonnegative probabilities that obey the sum rules may be assigned to a much
wider family of sets of histories than decohering histories. The resulting {\it
linearly positive histories} avoid the highly restrictive decoherence
conditions and yet give the same probabilities when those conditions apply.
Thus linearly po... | [
{
"created": "Tue, 29 Mar 1994 22:59:58 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Sep 1994 20:09:38 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Mar 1995 20:32:41 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Goldstein",
"Sheldon",
"",
"Rutgers University"
],
[
"Page",
"Don N.",
"",
"University of\n Alberta"
]
] | Nonnegative probabilities that obey the sum rules may be assigned to a much wider family of sets of histories than decohering histories. The resulting {\it linearly positive histories} avoid the highly restrictive decoherence conditions and yet give the same probabilities when those conditions apply. Thus linearly posi... |
gr-qc/0107099 | Hideo Iguchi | Hideo Iguchi and Tomohiro Harada | Physical aspects of naked singularity explosion - How does a naked
singularity explode? -- | 18 pages, 16 figures | Class.Quant.Grav.18:3681-3700,2001 | 10.1088/0264-9381/18/17/319 | YITP-01-22, WU-AP/121/01 | gr-qc | null | The behaviors of quantum stress tensor for the scalar field on the classical
background of spherical dust collapse is studied. In the previous works
diverging flux of quantum radiation was predicted. We use the exact expressions
in a 2D model formulated by Barve et al. Our present results show that the back
reaction ... | [
{
"created": "Tue, 31 Jul 2001 06:10:19 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Iguchi",
"Hideo",
""
],
[
"Harada",
"Tomohiro",
""
]
] | The behaviors of quantum stress tensor for the scalar field on the classical background of spherical dust collapse is studied. In the previous works diverging flux of quantum radiation was predicted. We use the exact expressions in a 2D model formulated by Barve et al. Our present results show that the back reaction do... |
gr-qc/9805051 | Marc A. Pelath | M.A. Pelath, K.P. Tod, and Robert M. Wald | Trapped surfaces in prolate collapse in the Gibbons-Penrose construction | 22 pages, 6 figures | Class.Quant.Grav. 15 (1998) 3917-3934 | 10.1088/0264-9381/15/12/018 | null | gr-qc | null | We investigate existence and properties of trapped surfaces in two models of
collapsing null dust shells within the Gibbons-Penrose construction. In the
first model, the shell is initially a prolate spheroid, and the resulting
singularity forms at the ends first (relative to a natural time slicing by flat
hyperplanes... | [
{
"created": "Wed, 13 May 1998 20:23:04 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Pelath",
"M. A.",
""
],
[
"Tod",
"K. P.",
""
],
[
"Wald",
"Robert M.",
""
]
] | We investigate existence and properties of trapped surfaces in two models of collapsing null dust shells within the Gibbons-Penrose construction. In the first model, the shell is initially a prolate spheroid, and the resulting singularity forms at the ends first (relative to a natural time slicing by flat hyperplanes),... |
1606.00698 | Srijit Bhattacharjee | Srijit Bhattacharjee, Debaprasad Maity, and Rupak Mukherjee | Constraining scalar-Gauss-Bonnet Inflation by Reheating, Unitarity and
PLANCK | 22 pages, 12 Pdf figures; Modified version including updated analyses
compatible with the latest observational data. Almost matches with the
published version | Phys. Rev. D 95, 023514 (2017) | 10.1103/PhysRevD.95.023514 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the inflationary dynamics in detail for theories with Gauss-Bonnet
gravity coupled to scalar functions, in light of the Planck data. Considering
the chaotic inflationary scenario, we constrain the parameters of two models
involving inflaton-Gauss-Bonnet coupling by current Planck data. For non zero
inflato... | [
{
"created": "Mon, 30 May 2016 15:04:22 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Jun 2016 12:32:44 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Feb 2017 19:28:18 GMT",
"version": "v3"
}
] | 2017-02-08 | [
[
"Bhattacharjee",
"Srijit",
""
],
[
"Maity",
"Debaprasad",
""
],
[
"Mukherjee",
"Rupak",
""
]
] | We revisit the inflationary dynamics in detail for theories with Gauss-Bonnet gravity coupled to scalar functions, in light of the Planck data. Considering the chaotic inflationary scenario, we constrain the parameters of two models involving inflaton-Gauss-Bonnet coupling by current Planck data. For non zero inflaton-... |
gr-qc/0602100 | Martin Bojowald | Martin Bojowald | Quantum Riemannian Geometry and Black Holes | 45 pages, 4 figures, chapter of "Trends in Quantum Gravity Research"
(Nova Science) | null | null | IGPG-06/2-2, AEI-2006-009 | gr-qc hep-th | null | Black Holes have always played a central role in investigations of quantum
gravity. This includes both conceptual issues such as the role of classical
singularities and information loss, and technical ones to probe the consistency
of candidate theories. Lacking a full theory of quantum gravity, such studies
had long ... | [
{
"created": "Fri, 24 Feb 2006 17:30:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bojowald",
"Martin",
""
]
] | Black Holes have always played a central role in investigations of quantum gravity. This includes both conceptual issues such as the role of classical singularities and information loss, and technical ones to probe the consistency of candidate theories. Lacking a full theory of quantum gravity, such studies had long be... |
gr-qc/0004075 | T. Damour | Thibault Damour and Alexander Vilenkin | Gravitational wave bursts from cosmic strings | 4 pages, revtex, 2 figures, submitted to Phys. Rev. Letters | Phys.Rev.Lett.85:3761-3764,2000 | 10.1103/PhysRevLett.85.3761 | IHES/P/00/32 | gr-qc astro-ph hep-ph hep-th | null | Cusps of cosmic strings emit strong beams of high-frequency gravitational
waves (GW). As a consequence of these beams, the stochastic ensemble of
gravitational waves generated by a cosmological network of oscillating loops is
strongly non Gaussian, and includes occasional sharp bursts that stand above
the rms GW back... | [
{
"created": "Wed, 26 Apr 2000 09:47:22 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Damour",
"Thibault",
""
],
[
"Vilenkin",
"Alexander",
""
]
] | Cusps of cosmic strings emit strong beams of high-frequency gravitational waves (GW). As a consequence of these beams, the stochastic ensemble of gravitational waves generated by a cosmological network of oscillating loops is strongly non Gaussian, and includes occasional sharp bursts that stand above the rms GW backgr... |
2404.19268 | Diego Solano-Alfaro | Diego Solano-Alfaro and Francisco Frutos-Alfaro | Equatorial circular motion in a Kerr-like spacetime | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An study of the equatorial circular motion of photons and massive particles
around a rotating compact body like a neutron star is presented. For this goal,
we use an approximate Kerr-like metric with mass quadrupole as perturbation.
The effect of this deformation on the photon sphere, and the innermost stable
circula... | [
{
"created": "Tue, 30 Apr 2024 05:21:22 GMT",
"version": "v1"
}
] | 2024-05-01 | [
[
"Solano-Alfaro",
"Diego",
""
],
[
"Frutos-Alfaro",
"Francisco",
""
]
] | An study of the equatorial circular motion of photons and massive particles around a rotating compact body like a neutron star is presented. For this goal, we use an approximate Kerr-like metric with mass quadrupole as perturbation. The effect of this deformation on the photon sphere, and the innermost stable circular ... |
gr-qc/9604036 | Heinz-Dieter Conradi | Heinz-Dieter Conradi (RWTH-Aachen, Germany) | Tunneling of Macroscopic Universes | 10 pages, one eps-file includes, uses LaTeX2e | Int.J.Mod.Phys. D7 (1998) 189-200 | 10.1142/S0218271898000152 | PHITA 95/36 | gr-qc | null | The meaning of `tunneling' in a timeless theory such as quantum cosmology is
discussed. A recent suggestion of `tunneling' of the macroscopic universe at
the classical turning point is analyzed in an anisotropic and inhomogeneous toy
model. This `inhomogeneous tunneling' is a local process which cannot be
interpreted... | [
{
"created": "Thu, 18 Apr 1996 15:48:18 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Conradi",
"Heinz-Dieter",
"",
"RWTH-Aachen, Germany"
]
] | The meaning of `tunneling' in a timeless theory such as quantum cosmology is discussed. A recent suggestion of `tunneling' of the macroscopic universe at the classical turning point is analyzed in an anisotropic and inhomogeneous toy model. This `inhomogeneous tunneling' is a local process which cannot be interpreted a... |
1810.04153 | Philipp Hoehn | Philipp A Hoehn and Augustin Vanrietvelde | How to switch between relational quantum clocks | 26 pages + appendices. Written in a manner accessible to an audience
unacquainted with the problem of time and Hamiltonian constraints. A few
clarifications added. Matches published version | New J. Phys. 22 (2020) 123048 | 10.1088/1367-2630/abd1ac | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Every clock is a physical system and thereby ultimately quantum. A naturally
arising question is how to describe time evolution relative to quantum clocks
and, specifically, how the dynamics relative to different quantum clocks are
related. This is a pressing issue in view of the multiple choice problem of
time in qu... | [
{
"created": "Tue, 9 Oct 2018 17:48:19 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Jul 2020 16:23:35 GMT",
"version": "v2"
},
{
"created": "Mon, 4 Jan 2021 15:43:33 GMT",
"version": "v3"
}
] | 2021-01-05 | [
[
"Hoehn",
"Philipp A",
""
],
[
"Vanrietvelde",
"Augustin",
""
]
] | Every clock is a physical system and thereby ultimately quantum. A naturally arising question is how to describe time evolution relative to quantum clocks and, specifically, how the dynamics relative to different quantum clocks are related. This is a pressing issue in view of the multiple choice problem of time in quan... |
1604.01385 | David A. Craig | David A. Craig | The consistent histories approach to loop quantum cosmology | 31 pages, 4 pdf figures. Invited review for special issue of Int. J.
Mod. Phys. D on loop quantum cosmology. Typos corrected | Int. J. Mod. Phys. D25 1642009 (2016) | 10.1142/S0218271816420098 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the application of the consistent (or decoherent) histories
formulation of quantum theory to canonical loop quantum cosmology. Conventional
quantum theory relies crucially on "measurements" to convert unrealized quantum
potentialities into physical outcomes that can be assigned probabilities. In
the early u... | [
{
"created": "Tue, 5 Apr 2016 19:51:12 GMT",
"version": "v1"
},
{
"created": "Tue, 3 May 2016 15:55:05 GMT",
"version": "v2"
},
{
"created": "Mon, 6 Jun 2016 05:48:17 GMT",
"version": "v3"
}
] | 2016-06-30 | [
[
"Craig",
"David A.",
""
]
] | We review the application of the consistent (or decoherent) histories formulation of quantum theory to canonical loop quantum cosmology. Conventional quantum theory relies crucially on "measurements" to convert unrealized quantum potentialities into physical outcomes that can be assigned probabilities. In the early uni... |
1308.6289 | Sanved Kolekar | Sanved Kolekar and T. Padmanabhan | Indistinguishability of thermal and quantum fluctuations | v1. 4 pages, no figure, v2. minor clarification added, v3. accepted
for publication in CQG Fast Track Comm | Class. Quant. Grav. Fast Track Comm 32, 202001 (2015) | 10.1088/0264-9381/32/20/202001 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of Davies-Unruh temperature in a uniformly accelerated frame
shows that quantum fluctuations of the inertial vacuum state appears as thermal
fluctuations in the accelerated frame. Hence thermodynamic experiments cannot
distinguish between phenomena occurring in a thermal bath of temperature T in
the ine... | [
{
"created": "Wed, 28 Aug 2013 20:00:30 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Sep 2013 00:25:21 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Aug 2015 16:02:06 GMT",
"version": "v3"
}
] | 2018-06-20 | [
[
"Kolekar",
"Sanved",
""
],
[
"Padmanabhan",
"T.",
""
]
] | The existence of Davies-Unruh temperature in a uniformly accelerated frame shows that quantum fluctuations of the inertial vacuum state appears as thermal fluctuations in the accelerated frame. Hence thermodynamic experiments cannot distinguish between phenomena occurring in a thermal bath of temperature T in the inert... |
gr-qc/9304005 | Mark A. Miller | O. Bostrom, M. Miller, L. Smolin | A New Discretization of Classical and Quantum General Relativity | 25 pages, LaTeX (calculational errors corrected, revised conclusions) | null | null | Goteborg ITP 94-5, SU-GP-93-4-1, CGPG-94/3-3 | gr-qc hep-lat hep-th | null | We propose a new discrete approximation to the Einstein equations, based on
the Capovilla-Dell-Jacobson form of the action for the Ashtekar variables. This
formulation is analogous to the Regge calculus in that the curvature has
support on sets of measure zero. Both a Lagrangian and Hamiltonian formulation
are propos... | [
{
"created": "Mon, 5 Apr 1993 13:51:34 GMT",
"version": "v1"
},
{
"created": "Tue, 10 May 1994 21:02:16 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Bostrom",
"O.",
""
],
[
"Miller",
"M.",
""
],
[
"Smolin",
"L.",
""
]
] | We propose a new discrete approximation to the Einstein equations, based on the Capovilla-Dell-Jacobson form of the action for the Ashtekar variables. This formulation is analogous to the Regge calculus in that the curvature has support on sets of measure zero. Both a Lagrangian and Hamiltonian formulation are proposed... |
0707.1608 | Roberto Giambo' | Roberto Giamb\'o, Sara Quintavalle | Dimensional dependence of naked singularity formation in spherical
gravitational collapse | 11 pages, to appear with minor modifications on Class. Quantum Grav | Class.Quant.Grav.25:145003,2008 | 10.1088/0264-9381/25/14/145003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The complete spectrum of the endstates - naked singularities, or blackholes -
of gravitational collapse is analyzed for a wide class of $N$-dimensional
spacetimes in spherical symmetry, which includes and generalizes the dust
solutions and the case of vanishing radial stresses. The final fate of the
collapse is shown... | [
{
"created": "Wed, 11 Jul 2007 13:04:18 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Jun 2008 17:12:52 GMT",
"version": "v2"
}
] | 2010-03-24 | [
[
"Giambó",
"Roberto",
""
],
[
"Quintavalle",
"Sara",
""
]
] | The complete spectrum of the endstates - naked singularities, or blackholes - of gravitational collapse is analyzed for a wide class of $N$-dimensional spacetimes in spherical symmetry, which includes and generalizes the dust solutions and the case of vanishing radial stresses. The final fate of the collapse is shown t... |
1905.07638 | Oldrich Semerak | O. Semer\'ak, M. Basovn\'ik, P. Kotla\v{r}\'ik | Schwarzschild binary supported by an Appell ring | 20 pages, 17 figures | Physical Review D 99 (2019) 064050 | 10.1103/PhysRevD.99.064050 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We continue to study black holes subjected to strong sources of gravity,
again paying special attention to the behaviour of geometry in the black-hole
interior. After examining, in previous two papers, the deformation arising in
the Majumdar-Papapetrou binary of extremally charged black holes and that of a
Schwarzsch... | [
{
"created": "Sat, 18 May 2019 20:13:58 GMT",
"version": "v1"
}
] | 2019-05-21 | [
[
"Semerák",
"O.",
""
],
[
"Basovník",
"M.",
""
],
[
"Kotlařík",
"P.",
""
]
] | We continue to study black holes subjected to strong sources of gravity, again paying special attention to the behaviour of geometry in the black-hole interior. After examining, in previous two papers, the deformation arising in the Majumdar-Papapetrou binary of extremally charged black holes and that of a Schwarzschil... |
gr-qc/9603060 | Philip Papadopoulos | Roberto Go'mez (1), Pablo Laguna (2), Philippos Papadopoulos (2) and
Jeff Winicour (1) ((1) University of Pittsburgh, (2) Penn State University) | Cauchy-characteristic Evolution of Einstein-Klein-Gordon Systems | Submitted to Phys. Rev. D, 16 pages, revtex, 7 figures available at
http://nr.astro.psu.edu:8080/preprints.html | Phys.Rev.D54:4719-4727,1996 | 10.1103/PhysRevD.54.4719 | CGPG-96/4-1 | gr-qc | null | A Cauchy-characteristic initial value problem for the Einstein-Klein-Gordon
system with spherical symmetry is presented. Initial data are specified on the
union of a space-like and null hypersurface. The development of the data is
obtained with the combination of a constrained Cauchy evolution in the interior
domain ... | [
{
"created": "Fri, 29 Mar 1996 21:15:36 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Go'mez",
"Roberto",
"",
"University of Pittsburgh"
],
[
"Laguna",
"Pablo",
"",
"Penn State University"
],
[
"Papadopoulos",
"Philippos",
"",
"Penn State University"
],
[
"Winicour",
"Jeff",
"",
"University of Pittsburgh"
]
] | A Cauchy-characteristic initial value problem for the Einstein-Klein-Gordon system with spherical symmetry is presented. Initial data are specified on the union of a space-like and null hypersurface. The development of the data is obtained with the combination of a constrained Cauchy evolution in the interior domain an... |
0811.4484 | Grigory Vereshkov | Leonid Marochnik (1), Daniel Usikov, and Grigory Vereshkov (2) ((1)
University of Maryland, College Park, (2) Research Institute of Physics,
Southern Federal University) | Graviton, ghost and instanton condensation on horizon scale of the
Universe. Dark energy as a macroscopic effect of quantum gravity | 92 pp, 4 figs, REVTeX 4; v2: misprints corrected; some footnotes and
refs added | null | null | null | gr-qc astro-ph hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that cosmological acceleration, Dark Energy (DE) effect is a
consequence of the zero rest mass, conformal non-invariance of gravitons, and
1-loop finiteness of quantum gravity (QG). The effect is due to graviton-ghost
condensates arising from the interference of quantum coherent states. The
theory is construc... | [
{
"created": "Thu, 27 Nov 2008 08:34:37 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Sep 2009 07:57:14 GMT",
"version": "v2"
}
] | 2009-09-07 | [
[
"Marochnik",
"Leonid",
""
],
[
"Usikov",
"Daniel",
""
],
[
"Vereshkov",
"Grigory",
""
]
] | We show that cosmological acceleration, Dark Energy (DE) effect is a consequence of the zero rest mass, conformal non-invariance of gravitons, and 1-loop finiteness of quantum gravity (QG). The effect is due to graviton-ghost condensates arising from the interference of quantum coherent states. The theory is constructe... |
1807.01379 | Gerard Clement | G\'erard Cl\'ement | Rotating magnetized black diholes | 25 pages, revised version published in Phys. Rev. D | Phys. Rev. D 98, 104003 (2018) | 10.1103/PhysRevD.98.104003 | LAPTH-020/18 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze a four-parameter class of asymptotically flat magnetized solutions
to the Einstein-Maxwell equations constructed by Manko et al., and show that
these represent systems of two co-rotating extreme black holes with equal
masses and electric charges, and opposite magnetic and NUT charges, connected
by a cosmic... | [
{
"created": "Tue, 3 Jul 2018 21:50:32 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Nov 2018 13:15:48 GMT",
"version": "v2"
}
] | 2018-11-14 | [
[
"Clément",
"Gérard",
""
]
] | We analyze a four-parameter class of asymptotically flat magnetized solutions to the Einstein-Maxwell equations constructed by Manko et al., and show that these represent systems of two co-rotating extreme black holes with equal masses and electric charges, and opposite magnetic and NUT charges, connected by a cosmic s... |
1808.01372 | Jordan Wilson-Gerow | Jordan Wilson-Gerow, Colby DeLisle, Philip Stamp | A functional approach to soft graviton scattering and BMS charges | 20 pages, 4 figures | 2018 Class. Quantum Grav. 35 164001 | 10.1088/1361-6382/aacfef | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the interaction between a matter system and soft gravitons. We
use a functional eikonal expansion to deal with the infrared divergences, and
introduce a "composite generating functional" which allows us to calculate a
decoherence functional for the time evolution of the system. These techniques
allow us t... | [
{
"created": "Fri, 3 Aug 2018 21:48:38 GMT",
"version": "v1"
}
] | 2018-08-07 | [
[
"Wilson-Gerow",
"Jordan",
""
],
[
"DeLisle",
"Colby",
""
],
[
"Stamp",
"Philip",
""
]
] | We consider the interaction between a matter system and soft gravitons. We use a functional eikonal expansion to deal with the infrared divergences, and introduce a "composite generating functional" which allows us to calculate a decoherence functional for the time evolution of the system. These techniques allow us to ... |
1004.0627 | Ahmad Sheykhi | Ahmad Sheykhi | Entropic Corrections to Friedmann Equations | 4 pages, the version appears in Phys. Rev. D | Phys.Rev.D81:104011,2010 | 10.1103/PhysRevD.81.104011 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | Recently, Verlinde discussed that gravity can be understood as an entropic
force caused by changes in the information associated with the positions of
material bodies. In the Verlinde's argument, the area law of the black hole
entropy plays a crucial role. However, the entropy-area relation can be
modified from the i... | [
{
"created": "Tue, 30 Mar 2010 08:33:38 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Apr 2010 07:14:24 GMT",
"version": "v2"
},
{
"created": "Sat, 10 Apr 2010 03:48:10 GMT",
"version": "v3"
},
{
"created": "Tue, 27 Apr 2010 04:37:04 GMT",
"version": "v4"
}
] | 2010-05-19 | [
[
"Sheykhi",
"Ahmad",
""
]
] | Recently, Verlinde discussed that gravity can be understood as an entropic force caused by changes in the information associated with the positions of material bodies. In the Verlinde's argument, the area law of the black hole entropy plays a crucial role. However, the entropy-area relation can be modified from the inc... |
0902.0481 | Edvin Deadman | E. Deadman, J. M. Stewart | Numerical Relativity and Asymptotic Flatness | 24 pages, to be published in Classical and Quantum Gravity | Class.Quant.Grav.26:065008,2009 | 10.1088/0264-9381/26/6/065008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is highly plausible that the region of space-time far from an isolated
gravitating body is, in some sense, asymptotically Minkowskian. However
theoretical studies of the full nonlinear theory, initiated by Bondi et al.
(1962), Sachs (1962) and Newman & Unti (1962), rely on careful, clever,
a-priori choices of char... | [
{
"created": "Tue, 3 Feb 2009 11:40:30 GMT",
"version": "v1"
}
] | 2009-09-30 | [
[
"Deadman",
"E.",
""
],
[
"Stewart",
"J. M.",
""
]
] | It is highly plausible that the region of space-time far from an isolated gravitating body is, in some sense, asymptotically Minkowskian. However theoretical studies of the full nonlinear theory, initiated by Bondi et al. (1962), Sachs (1962) and Newman & Unti (1962), rely on careful, clever, a-priori choices of chart ... |
2012.14429 | Cl\'audio Gomes | Cl\'audio Gomes and Orfeu Bertolami | Stability Conditions for the Horndeski Scalar Field Gravity Model | 12 pages | null | 10.1088/1475-7516/2022/04/008 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We constrain the viable models of Horndeski gravity, written in its
equivalent Generalised Galileon version, by resorting to the Witten positive
energy theorem. We find that the free function $G_3(\phi, X)$ in the Lagrangian
is constrained to be a function solely of the scalar field, $G_3(\phi)$, and
relations among ... | [
{
"created": "Sun, 27 Dec 2020 13:28:58 GMT",
"version": "v1"
}
] | 2022-04-12 | [
[
"Gomes",
"Cláudio",
""
],
[
"Bertolami",
"Orfeu",
""
]
] | We constrain the viable models of Horndeski gravity, written in its equivalent Generalised Galileon version, by resorting to the Witten positive energy theorem. We find that the free function $G_3(\phi, X)$ in the Lagrangian is constrained to be a function solely of the scalar field, $G_3(\phi)$, and relations among th... |
1910.13329 | Bogeun Gwak | Bogeun Gwak | Weak Cosmic Censorship in Kerr-Sen Black Hole under Charged Scalar Field | 15 pages, 5 figures, published in JCAP | JCAP 03 (2020) 058 | 10.1088/1475-7516/2020/03/058 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the weak cosmic censorship conjecture for Kerr-Sen black
holes, which are solutions to the four-dimensional low-energy effective field
theory for the heterotic string theory, based on the scattering of a charged
scalar field. When the fluxes of the scalar field are assumed to transfer its
conserved qua... | [
{
"created": "Tue, 29 Oct 2019 15:48:28 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Mar 2020 23:33:28 GMT",
"version": "v2"
}
] | 2020-04-01 | [
[
"Gwak",
"Bogeun",
""
]
] | We investigate the weak cosmic censorship conjecture for Kerr-Sen black holes, which are solutions to the four-dimensional low-energy effective field theory for the heterotic string theory, based on the scattering of a charged scalar field. When the fluxes of the scalar field are assumed to transfer its conserved quant... |
gr-qc/0104067 | Claus Laemmerzahl | Claus L\"ammerzahl, Hansj\"org Dittus, Achim Peters, Stephan Schiller | OPTIS - a satellite-based test of Special and General Relativity | To appear in Class. Quantum Grav | Class.Quant.Grav. 18 (2001) 2499-2508 | 10.1088/0264-9381/18/13/312 | null | gr-qc | null | A new satellite based test of Special and General Relativity is proposed. For
the Michelson-Morley experiment we expect an improvement of at least three
orders of magnitude, and for the Kennedy-Thorndike experiment an improvement of
more than one order of magnitude. Furthermore, an improvement by two orders of
the te... | [
{
"created": "Fri, 20 Apr 2001 16:57:06 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Lämmerzahl",
"Claus",
""
],
[
"Dittus",
"Hansjörg",
""
],
[
"Peters",
"Achim",
""
],
[
"Schiller",
"Stephan",
""
]
] | A new satellite based test of Special and General Relativity is proposed. For the Michelson-Morley experiment we expect an improvement of at least three orders of magnitude, and for the Kennedy-Thorndike experiment an improvement of more than one order of magnitude. Furthermore, an improvement by two orders of the test... |
2307.01055 | Yan Wang | Wen-Fan Feng, Tan Liu, Jie-Wen Chen, Yan Wang and Soumya D. Mohanty | Effects of spin-orbit coupling on gravitational waveforms from a
triaxial non-aligned neutron star in a binary system | 17 pages, 9 figures. Match the version accepted by PRD | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Spinning neutron stars (NSs) can emit continuous gravitational waves (GWs)
that carry a wealth of information about the compact object. If such a signal
is detected, it will provide us with new insight into the physical properties
of matter under extreme conditions. Future space-based GW detectors, such as
LISA and T... | [
{
"created": "Mon, 3 Jul 2023 14:35:16 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Sep 2023 07:38:44 GMT",
"version": "v2"
}
] | 2023-09-12 | [
[
"Feng",
"Wen-Fan",
""
],
[
"Liu",
"Tan",
""
],
[
"Chen",
"Jie-Wen",
""
],
[
"Wang",
"Yan",
""
],
[
"Mohanty",
"Soumya D.",
""
]
] | Spinning neutron stars (NSs) can emit continuous gravitational waves (GWs) that carry a wealth of information about the compact object. If such a signal is detected, it will provide us with new insight into the physical properties of matter under extreme conditions. Future space-based GW detectors, such as LISA and Tia... |
1210.6807 | Laszlo Arpad Gergely | M\'arton T\'apai, Zolt\'an Keresztes, L\'aszl\'o \'Arp\'ad Gergely | Gravitational waveforms for black hole binaries with unequal masses | submitted to the proceedings of the conference on Relativity and
Gravitation: 100 Years after Einstein in Prague | Springer Proceedings in Physics 157, 455-458 (2014) | 10.1007/978-3-319-06761-2_65 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derived a post-Newtonian (PN) inspiral only gravitational waveform for
unequal mass, spinning black hole binaries. Towards the end of the inspiral the
larger spin dominates over the orbital angular momentum (while the smaller spin
is negligible), hence the name Spin-Dominated Waveforms (SDW). Such systems are
comm... | [
{
"created": "Thu, 25 Oct 2012 12:22:23 GMT",
"version": "v1"
}
] | 2014-09-12 | [
[
"Tápai",
"Márton",
""
],
[
"Keresztes",
"Zoltán",
""
],
[
"Gergely",
"László Árpád",
""
]
] | We derived a post-Newtonian (PN) inspiral only gravitational waveform for unequal mass, spinning black hole binaries. Towards the end of the inspiral the larger spin dominates over the orbital angular momentum (while the smaller spin is negligible), hence the name Spin-Dominated Waveforms (SDW). Such systems are common... |
2105.02086 | Adrian Macquet | Adrian Macquet, Marie-Anne Bizouard, Eric Burns, Nelson Christensen,
Michael Coughlin, Zorawar Wadiasingh, George Younes | Search for Long-duration Gravitational-wave Signals Associated with
Magnetar Giant Flares | null | The Astrophysical Journal, 918:80 (7pp), 2021 September 10 | 10.3847/1538-4357/ac0efd | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Magnetar giant flares are rare and highly energetic phenomena observed in the
transient sky whose emission mechanisms are still not fully understood.
Depending on the nature of the excited modes of the magnetar, they are also
expected to emit gravitational waves, which may bring unique information about
the dynamics ... | [
{
"created": "Wed, 5 May 2021 14:38:02 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Sep 2021 14:47:25 GMT",
"version": "v2"
}
] | 2021-09-14 | [
[
"Macquet",
"Adrian",
""
],
[
"Bizouard",
"Marie-Anne",
""
],
[
"Burns",
"Eric",
""
],
[
"Christensen",
"Nelson",
""
],
[
"Coughlin",
"Michael",
""
],
[
"Wadiasingh",
"Zorawar",
""
],
[
"Younes",
"George",
"... | Magnetar giant flares are rare and highly energetic phenomena observed in the transient sky whose emission mechanisms are still not fully understood. Depending on the nature of the excited modes of the magnetar, they are also expected to emit gravitational waves, which may bring unique information about the dynamics of... |
1006.1830 | Ron Lenk | Ron Lenk | Classical Electron Model with QED Corrections | 6 pages, comments welcome | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we build a metric for a classical general relativistic
electron model with QED corrections. We calculate the stress-energy tensor for
the radiative corrections to the Coulomb potential in both the near-field and
far-field approximations. We solve the three field equations in both cases by
using a pert... | [
{
"created": "Tue, 8 Jun 2010 17:26:22 GMT",
"version": "v1"
}
] | 2010-06-10 | [
[
"Lenk",
"Ron",
""
]
] | In this article we build a metric for a classical general relativistic electron model with QED corrections. We calculate the stress-energy tensor for the radiative corrections to the Coulomb potential in both the near-field and far-field approximations. We solve the three field equations in both cases by using a pertur... |
gr-qc/9509005 | null | E. Recami, F. Raciti, W.A. Rodrigues Jr., and V.T. Zanchin | Micro--universes and ``strong black holes'': a purely geometric approach
to elementary particles | standard latex file, using wspro.sty | null | null | null | gr-qc | null | We present here a panoramic view of our unified, bi--scale theory of
gravitational and strong interactions [which is mathematically analogous to the
last version of N.Rosen's bi--metric theory; and yields physical results
similar to strong gravity's]. This theory, developed during the last 15 years,
is purely geometr... | [
{
"created": "Mon, 4 Sep 1995 10:09:49 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Recami",
"E.",
""
],
[
"Raciti",
"F.",
""
],
[
"Rodrigues",
"W. A.",
"Jr."
],
[
"Zanchin",
"V. T.",
""
]
] | We present here a panoramic view of our unified, bi--scale theory of gravitational and strong interactions [which is mathematically analogous to the last version of N.Rosen's bi--metric theory; and yields physical results similar to strong gravity's]. This theory, developed during the last 15 years, is purely geometric... |
1002.2329 | Lo\"ic Rolland | The Virgo collaboration: T. Accadia, F. Acernese, F. Antonucci, S.
Aoudia, K. G. Arun, P. Astone, G. Ballardin, F. Barone, M. Barsuglia, Th. S.
Bauer, M.G. Beker, A. Belletoile, S. Bigotta, S. Birindelli, M. Bitossi, M.
A. Bizouard, M. Blom, C. Boccara, F. Bondu, L. Bonelli, R. Bonnand, L. Bosi,
S. Braccini, C.... | Virgo calibration and reconstruction of the gravitational wave strain
during VSR1 | 8 pages, 8 figures, proceedings of Amaldi 8 conference, to be
published in Journal of Physics Conference Series (JPCS). Second release:
correct typos | J.Phys.Conf.Ser.228:012015,2010 | 10.1088/1742-6596/228/1/012015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Virgo is a kilometer-length interferometer for gravitational waves detection
located near Pisa. Its first science run, VSR1, occured from May to October
2007. The aims of the calibration are to measure the detector sensitivity and
to reconstruct the time series of the gravitational wave strain h(t). The
absolute leng... | [
{
"created": "Thu, 11 Feb 2010 12:41:31 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Feb 2010 09:02:09 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"The Virgo collaboration",
"",
""
],
[
"Accadia",
"T.",
""
],
[
"Acernese",
"F.",
""
],
[
"Antonucci",
"F.",
""
],
[
"Aoudia",
"S.",
""
],
[
"Arun",
"K. G.",
""
],
[
"Astone",
"P.",
""
],
[
"Ballard... | Virgo is a kilometer-length interferometer for gravitational waves detection located near Pisa. Its first science run, VSR1, occured from May to October 2007. The aims of the calibration are to measure the detector sensitivity and to reconstruct the time series of the gravitational wave strain h(t). The absolute length... |
2010.07330 | Alexandru Lupsasca | Delilah E. A. Gates, Shahar Hadar, Alexandru Lupsasca | Photon Emission from Circular Equatorial Kerr Orbiters | 24 pages, 10 figures. v2: expanded discussion | Phys. Rev. D 103, 044050 (2021) | 10.1103/PhysRevD.103.044050 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider monochromatic and isotropic photon emission from circular
equatorial Kerr orbiters. We derive analytic expressions for the photon escape
probability and the redshift-dependent total flux collected on the celestial
sphere as a function of emission radius and black hole parameters. These
calculations crucia... | [
{
"created": "Wed, 14 Oct 2020 18:01:37 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Nov 2020 22:31:12 GMT",
"version": "v2"
}
] | 2021-03-03 | [
[
"Gates",
"Delilah E. A.",
""
],
[
"Hadar",
"Shahar",
""
],
[
"Lupsasca",
"Alexandru",
""
]
] | We consider monochromatic and isotropic photon emission from circular equatorial Kerr orbiters. We derive analytic expressions for the photon escape probability and the redshift-dependent total flux collected on the celestial sphere as a function of emission radius and black hole parameters. These calculations cruciall... |
gr-qc/0502083 | Jia Feng Chang | Jia-Feng Chang and You-Gen Shen | Neutrino Quasinormal Modes of a Kerr-Newman-de Sitter Black Hole | 25 pages, 13 figures | Nucl.Phys.B712:347-370,2005 | 10.1016/j.nuclphysb.2005.01.043 | null | gr-qc | null | Using the P\"{o}shl-Teller approximation, we evaluate the neutrino
quasinormal modes (QNMs) of a Kerr-Newman-de Sitter black hole. The result
shows that for a Kerr-Newman-de Sitter black hole, massless neutrino
perturbation of large $\Lambda$, positive $m$ and small value of $n$ will decay
slowly.
| [
{
"created": "Mon, 21 Feb 2005 09:52:29 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Feb 2005 07:14:55 GMT",
"version": "v2"
},
{
"created": "Sat, 26 Mar 2005 14:51:09 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Chang",
"Jia-Feng",
""
],
[
"Shen",
"You-Gen",
""
]
] | Using the P\"{o}shl-Teller approximation, we evaluate the neutrino quasinormal modes (QNMs) of a Kerr-Newman-de Sitter black hole. The result shows that for a Kerr-Newman-de Sitter black hole, massless neutrino perturbation of large $\Lambda$, positive $m$ and small value of $n$ will decay slowly. |
1706.06372 | Orfeu Bertolami | Hodjat Mariji, Orfeu Bertolami | Neutron Stars, Ungravity, and the I-Love-Q relation | 20 pages, 1 table, 7 figures. Version to match the one that appeared
in Physical Review D96 (2017) 084042 | Phys. Rev. D 96, 084042 (2017) | 10.1103/PhysRevD.96.084042 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we study neutron stars (NSs) in an ungravity (UG) inspired
model. We examine the UG effects on the static properties of the selected NSs,
in different mass and radius regimes, i.e., mini, moderate, and heavy NSs,
using a polytropic equation of state approach. Based on the observational data,
we obtain b... | [
{
"created": "Tue, 20 Jun 2017 11:29:33 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Oct 2017 10:34:14 GMT",
"version": "v2"
}
] | 2017-10-25 | [
[
"Mariji",
"Hodjat",
""
],
[
"Bertolami",
"Orfeu",
""
]
] | In this work, we study neutron stars (NSs) in an ungravity (UG) inspired model. We examine the UG effects on the static properties of the selected NSs, in different mass and radius regimes, i.e., mini, moderate, and heavy NSs, using a polytropic equation of state approach. Based on the observational data, we obtain bou... |
1501.00918 | Juan Calderon Bustillo | Juan Calder\'on Bustillo, Alejandro Boh\'e, Sascha Husa, Alicia M.
Sintes, Mark Hannam and Michael P\"urrer | Comparison of subdominant gravitational wave harmonics between
post-Newtonian and numerical relativity calculations and construction of
multi-mode hybrids | 19 pages, 13 Figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waveforms which describe the inspiral, merger and ringdown of
coalescing binaries are usually constructed by synthesising information from
perturbative descriptions, in particular post-Newtonian theory and black-hole
perturbation theory, with numerical solutions of the full Einstein equations.
In this p... | [
{
"created": "Mon, 5 Jan 2015 16:47:15 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Feb 2015 13:51:22 GMT",
"version": "v2"
}
] | 2015-02-25 | [
[
"Bustillo",
"Juan Calderón",
""
],
[
"Bohé",
"Alejandro",
""
],
[
"Husa",
"Sascha",
""
],
[
"Sintes",
"Alicia M.",
""
],
[
"Hannam",
"Mark",
""
],
[
"Pürrer",
"Michael",
""
]
] | Gravitational waveforms which describe the inspiral, merger and ringdown of coalescing binaries are usually constructed by synthesising information from perturbative descriptions, in particular post-Newtonian theory and black-hole perturbation theory, with numerical solutions of the full Einstein equations. In this pap... |
1807.02148 | M. B. Paranjape | J. Gamboa, F. Mendez, M. B. Paranjape, Benoit Sirois | The twin paradox: the role of acceleration | 16 pages, 5 figures | null | 10.1139/cjp-2018-0788 | UdeM-GPP-TH-18-263 | gr-qc physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The twin paradox, which evokes from the the idea that two twins may age
differently because of their relative motion, has been studied and explained
ever since it was first described in 1906, the year after special relativity
was invented. The question can be asked: "Is there anything more to say?" It
seems evident t... | [
{
"created": "Thu, 5 Jul 2018 18:46:43 GMT",
"version": "v1"
}
] | 2019-10-23 | [
[
"Gamboa",
"J.",
""
],
[
"Mendez",
"F.",
""
],
[
"Paranjape",
"M. B.",
""
],
[
"Sirois",
"Benoit",
""
]
] | The twin paradox, which evokes from the the idea that two twins may age differently because of their relative motion, has been studied and explained ever since it was first described in 1906, the year after special relativity was invented. The question can be asked: "Is there anything more to say?" It seems evident tha... |
1707.06415 | Handhika Ramadhan | Ilham Prasetyo and Handhika S. Ramadhan | Classical defects in higher-dimensional Einstein gravity coupled to
nonlinear $\sigma$-models | accepted for publication in the General Relativity and Gravitation | null | 10.1007/s10714-017-2278-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct solutions of higher-dimensional Einstein gravity coupled to
nonlinear $\sigma$-model with cosmological constant. The $\sigma$-model can be
perceived as exterior configuration of a spontaneously-broken $SO(D-1)$ global
higher-codimensional "monopole". Here we allow the kinetic term of the
$\sigma$-model t... | [
{
"created": "Thu, 20 Jul 2017 08:42:20 GMT",
"version": "v1"
}
] | 2017-08-30 | [
[
"Prasetyo",
"Ilham",
""
],
[
"Ramadhan",
"Handhika S.",
""
]
] | We construct solutions of higher-dimensional Einstein gravity coupled to nonlinear $\sigma$-model with cosmological constant. The $\sigma$-model can be perceived as exterior configuration of a spontaneously-broken $SO(D-1)$ global higher-codimensional "monopole". Here we allow the kinetic term of the $\sigma$-model to ... |
0909.0274 | Martin Richarte MR | Luis P. Chimento, Monica Forte, and Martin G. Richarte | Crossing the phantom divide with k-essence in brane-worlds | 8 pages, 5 figures. The article was fully rewritten. References
added. Accepted for publication in MPLA (2010) | Mod.Phys.Lett.A25:2469-2481,2010 | 10.1142/S0217732310033797 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a flat 3-brane in presence of a linear $k$ field with nonzero
cosmological constant $\Lambda_{4}$. In this model the crossing of the phantom
divide (PD) occurs when the $k$-essence energy density becomes negative. We
show that in the high energy regime the effective equation of state has a
resemblance of a m... | [
{
"created": "Tue, 1 Sep 2009 20:21:00 GMT",
"version": "v1"
},
{
"created": "Sat, 5 Jun 2010 17:02:51 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Chimento",
"Luis P.",
""
],
[
"Forte",
"Monica",
""
],
[
"Richarte",
"Martin G.",
""
]
] | We study a flat 3-brane in presence of a linear $k$ field with nonzero cosmological constant $\Lambda_{4}$. In this model the crossing of the phantom divide (PD) occurs when the $k$-essence energy density becomes negative. We show that in the high energy regime the effective equation of state has a resemblance of a mod... |
gr-qc/9703039 | Sung S.-T. | S.-T. Sung | A Quantum Material Model of Static Schwarzschild Black Holes | 24 pages, Latex, 8 ps figures | null | null | null | gr-qc | null | A quantum-mechanical prescription of static Einstein field equation is
proposed in order to construct the matter-metric eigen-states in the interior
of a static Schwarzschild black hole where the signature of space-time is
chosen as (--++). The spectrum of the quantum states is identified to be the
integral multiples... | [
{
"created": "Sun, 16 Mar 1997 22:55:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Sung",
"S. -T.",
""
]
] | A quantum-mechanical prescription of static Einstein field equation is proposed in order to construct the matter-metric eigen-states in the interior of a static Schwarzschild black hole where the signature of space-time is chosen as (--++). The spectrum of the quantum states is identified to be the integral multiples o... |
1304.5430 | Manuel Hohmann | Manuel Hohmann | Extensions of Lorentzian spacetime geometry: From Finsler to Cartan and
vice versa | 33 pages, no figures, journal version | Phys. Rev. D 87 (2013) 124034 | 10.1103/PhysRevD.87.124034 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We briefly review two recently developed extensions of the Lorentzian
geometry of spacetime and prove that they are in fact closely related. The
first is the concept of observer space, which generalizes the space of
Lorentzian observers, i.e., future unit timelike vectors, using Cartan
geometry. The second is the con... | [
{
"created": "Fri, 19 Apr 2013 14:38:33 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Jun 2013 05:55:03 GMT",
"version": "v2"
}
] | 2013-06-28 | [
[
"Hohmann",
"Manuel",
""
]
] | We briefly review two recently developed extensions of the Lorentzian geometry of spacetime and prove that they are in fact closely related. The first is the concept of observer space, which generalizes the space of Lorentzian observers, i.e., future unit timelike vectors, using Cartan geometry. The second is the conce... |
2306.17221 | Benjamin Leather | Benjamin Leather, Niels Warburton | Applying the effective-source approach to frequency-domain self-force
calculations for eccentric orbits | 23 pages, 16 figures; updated to reflect published version | Phys. Rev. D 108, 084045 (2023) | 10.1103/PhysRevD.108.084045 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Extreme mass-ratio inspirals (EMRIs) are expected to have considerable
eccentricity when emitting gravitational waves (GWs) in the LISA band.
Developing GW templates that remain phase accurate over these long inspirals
requires the use of second-order self-force theory and practical second-order
self-force calculatio... | [
{
"created": "Thu, 29 Jun 2023 18:00:03 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Oct 2023 11:44:16 GMT",
"version": "v2"
}
] | 2023-10-25 | [
[
"Leather",
"Benjamin",
""
],
[
"Warburton",
"Niels",
""
]
] | Extreme mass-ratio inspirals (EMRIs) are expected to have considerable eccentricity when emitting gravitational waves (GWs) in the LISA band. Developing GW templates that remain phase accurate over these long inspirals requires the use of second-order self-force theory and practical second-order self-force calculations... |
2305.13984 | Asuka Ito | Asuka Ito, Kazunori Kohri, Kazunori Nakayama | Probing high frequency gravitational waves with pulsars | 7 pages, 2 figures | null | null | KEK-QUP-2023-0011, KEK-TH-2529, KEK-Cosmo-0314, TU-1192 | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study graviton-photon conversion in magnetosphere of a pulsar and explore
the possibility of detecting high frequency gravitational waves with pulsar
observations. It is shown that conversion of one polarization mode of photons
can be enhanced significantly due to strong magnetic fields around a pulsar. We
also co... | [
{
"created": "Tue, 23 May 2023 12:08:25 GMT",
"version": "v1"
}
] | 2023-05-24 | [
[
"Ito",
"Asuka",
""
],
[
"Kohri",
"Kazunori",
""
],
[
"Nakayama",
"Kazunori",
""
]
] | We study graviton-photon conversion in magnetosphere of a pulsar and explore the possibility of detecting high frequency gravitational waves with pulsar observations. It is shown that conversion of one polarization mode of photons can be enhanced significantly due to strong magnetic fields around a pulsar. We also cons... |
0708.3835 | Farhad Darabi | F. Darabi | A 5D non compact and non Ricci flat Kaluza-Klein Cosmology | 13 pages, major revision, published online in GRG | Gen. Relativ. Gravit 41: 497--504 (2009) | 10.1007/s10714-008-0685-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A model universe is proposed in the framework of 5-dimensional noncompact
Kaluza-Klein cosmology which is not Ricci flat. The 4D part as the
Robertson-Walker metric is coupled to conventional perfect fluid, and its
extra-dimensional part is coupled to a dark pressure through a scalar field. It
is shown that neither e... | [
{
"created": "Tue, 28 Aug 2007 19:13:05 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Jun 2008 18:08:14 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Sep 2008 10:14:30 GMT",
"version": "v3"
}
] | 2009-05-03 | [
[
"Darabi",
"F.",
""
]
] | A model universe is proposed in the framework of 5-dimensional noncompact Kaluza-Klein cosmology which is not Ricci flat. The 4D part as the Robertson-Walker metric is coupled to conventional perfect fluid, and its extra-dimensional part is coupled to a dark pressure through a scalar field. It is shown that neither ear... |
gr-qc/0503058 | Ken-Ichi Nakao | Hiroyuki Nakano, Ken-ichi Nakao, Masahide Yamaguchi | Black Strings in Our World | 11pages, no figure | Phys.Rev. D71 (2005) 124013 | 10.1103/PhysRevD.71.124013 | OCU-PHYS-229, AP-GR-24 | gr-qc astro-ph hep-ph | null | The brane world scenario is a new approach to resolve the problem on how to
compactify the higher dimensional spacetime to our 4-dimensional world. One of
the remarkable features of this scenario is the higher dimensional effects in
classical gravitational interactions at short distances. Due to this feature,
there a... | [
{
"created": "Mon, 14 Mar 2005 03:45:19 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Nakano",
"Hiroyuki",
""
],
[
"Nakao",
"Ken-ichi",
""
],
[
"Yamaguchi",
"Masahide",
""
]
] | The brane world scenario is a new approach to resolve the problem on how to compactify the higher dimensional spacetime to our 4-dimensional world. One of the remarkable features of this scenario is the higher dimensional effects in classical gravitational interactions at short distances. Due to this feature, there are... |
2404.11703 | Oscar Castillo Felisola Dr. | Oscar Castillo-Felisola and Bastian Grez and Gonzalo J. Olmo and Oscar
Orellana and Jos\'e Perdiguero G\'arate | Cosmological Solutions in Polynomial Affine Gravity with Torsion | EPJC format, 11 pages. v2: improved discussion, additional references | null | null | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | The Polynomial Affine Gravity is an alternative gravitational model, where
the interactions are mediated solely by the affine connection, instead of the
metric tensor. In this paper, we explore the space of solutions to the field
equations when the torsion fields are turned on, in a homogeneous and isotropic
(cosmolo... | [
{
"created": "Wed, 17 Apr 2024 19:10:32 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jun 2024 08:34:55 GMT",
"version": "v2"
}
] | 2024-06-05 | [
[
"Castillo-Felisola",
"Oscar",
""
],
[
"Grez",
"Bastian",
""
],
[
"Olmo",
"Gonzalo J.",
""
],
[
"Orellana",
"Oscar",
""
],
[
"Gárate",
"José Perdiguero",
""
]
] | The Polynomial Affine Gravity is an alternative gravitational model, where the interactions are mediated solely by the affine connection, instead of the metric tensor. In this paper, we explore the space of solutions to the field equations when the torsion fields are turned on, in a homogeneous and isotropic (cosmologi... |
0801.4529 | Saibal Ray | A. A. Usmani, P. P.Ghosh, Utpal Mukhopadhyay, P. C. Ray and Saibal Ray | The dark energy equation of state | 4 Latex pages, 3 figures, To appear in Mon. Not. R. Astron. Soc. Lett | Mon.Not.Roy.Astron.Soc.Lett.386:L92-95,2008 | 10.1111/j.1745-3933.2008.00468.x | null | gr-qc astro-ph hep-th | null | We perform a study of cosmic evolution with an equation of state parameter
$\omega(t)=\omega_0+\omega_1(t\dot H/H)$ by selecting a phenomenological
$\Lambda$ model of the form, $\dot\Lambda\sim H^3$. This simple proposition
explains both linearly expanding and inflationary Universes with a single set
of equations. We... | [
{
"created": "Tue, 29 Jan 2008 16:32:58 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Mar 2008 13:16:32 GMT",
"version": "v2"
}
] | 2009-11-13 | [
[
"Usmani",
"A. A.",
""
],
[
"Ghosh",
"P. P.",
""
],
[
"Mukhopadhyay",
"Utpal",
""
],
[
"Ray",
"P. C.",
""
],
[
"Ray",
"Saibal",
""
]
] | We perform a study of cosmic evolution with an equation of state parameter $\omega(t)=\omega_0+\omega_1(t\dot H/H)$ by selecting a phenomenological $\Lambda$ model of the form, $\dot\Lambda\sim H^3$. This simple proposition explains both linearly expanding and inflationary Universes with a single set of equations. We n... |
2007.12462 | Cosimo Bambi | Bakhtiyor Narzilloev, Javlon Rayimbaev, Sanjar Shaymatov, Ahmadjon
Abdujabbarov, Bobomurat Ahmedov, Cosimo Bambi | Can the dynamics of test particles around charged stringy black holes
mimic the spin of Kerr black holes? | 17 pages, 15 figures | Phys. Rev. D 102, 044013 (2020) | 10.1103/PhysRevD.102.044013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the motion of electrically charged particles, magnetic monopoles,
and magnetic dipoles around electrically and magnetically charged stringy black
holes. From the analysis of the radius of the innermost stable circular orbit
(ISCO) of electrically charged particles, we show that the electric charge $Q$
of str... | [
{
"created": "Fri, 24 Jul 2020 11:50:41 GMT",
"version": "v1"
}
] | 2020-08-12 | [
[
"Narzilloev",
"Bakhtiyor",
""
],
[
"Rayimbaev",
"Javlon",
""
],
[
"Shaymatov",
"Sanjar",
""
],
[
"Abdujabbarov",
"Ahmadjon",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Bambi",
"Cosimo",
""
]
] | We study the motion of electrically charged particles, magnetic monopoles, and magnetic dipoles around electrically and magnetically charged stringy black holes. From the analysis of the radius of the innermost stable circular orbit (ISCO) of electrically charged particles, we show that the electric charge $Q$ of strin... |
gr-qc/0112006 | Victor M. Villalba | Victor M. Villalba, Walter Greiner | Creation of scalar and Dirac particles in the presence of a time varying
electric field in an anisotropic Bianchi I universe | 8 pages, REVTEX 3.0. to appear in Phys. Rev. D | Phys.Rev. D65 (2002) 025007 | 10.1103/PhysRevD.65.025007 | null | gr-qc hep-th | null | In this article we compute the density of scalar and Dirac particles created
by a cosmological anisotropic Bianchi type I universe in the presence of a time
varying electric field. We show that the particle distribution becomes thermal
when one neglects the electric interaction.
| [
{
"created": "Fri, 7 Dec 2001 17:56:27 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Villalba",
"Victor M.",
""
],
[
"Greiner",
"Walter",
""
]
] | In this article we compute the density of scalar and Dirac particles created by a cosmological anisotropic Bianchi type I universe in the presence of a time varying electric field. We show that the particle distribution becomes thermal when one neglects the electric interaction. |
2303.07769 | Kalin Staykov Dr. | Kalin V. Staykov, Daniela D. Doneva, Lavinia Heisenberg, Nikolaos
Stergioulas, Stoytcho S. Yazadjiev | Differentially rotating scalarized neutron stars with realistic
post-merger profile | 17 pages, 6 figures | null | 10.1103/PhysRevD.108.024058 | ET-0053A-23 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The merger remnant of a binary neutron star coalescence is initially strongly
differentially rotating. Some properties of these remnants can be accurately
modeled through building equilibrium neutron star models. In the present paper,
we study how a modification of general relativity, namely scalar-tensor theory
with... | [
{
"created": "Tue, 14 Mar 2023 10:18:59 GMT",
"version": "v1"
}
] | 2023-08-02 | [
[
"Staykov",
"Kalin V.",
""
],
[
"Doneva",
"Daniela D.",
""
],
[
"Heisenberg",
"Lavinia",
""
],
[
"Stergioulas",
"Nikolaos",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | The merger remnant of a binary neutron star coalescence is initially strongly differentially rotating. Some properties of these remnants can be accurately modeled through building equilibrium neutron star models. In the present paper, we study how a modification of general relativity, namely scalar-tensor theory with a... |
2212.02917 | Muzaffer Adak | Muzaffer Adak, Nese Ozdemir, Ozcan Sert | Scale invariant Einstein-Cartan theory in three dimensions | Accepted for publication in Eur. Phys. J. C | Eur. Phys. J. C 83 (2023)106 | 10.1140/epjc/s10052-023-11255-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We retreat the well-known Einstein-Cartan theory by slightly modifying the
covariant derivative of spinor field by investigating double cover of the
Lorentz group. We first write the Lagrangian consisting of the Einstein-Hilbert
term, Dirac term and a scalar field term in a non-Riemannian spacetime with
curvature and... | [
{
"created": "Tue, 6 Dec 2022 12:17:29 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Jan 2023 18:56:16 GMT",
"version": "v2"
}
] | 2023-02-03 | [
[
"Adak",
"Muzaffer",
""
],
[
"Ozdemir",
"Nese",
""
],
[
"Sert",
"Ozcan",
""
]
] | We retreat the well-known Einstein-Cartan theory by slightly modifying the covariant derivative of spinor field by investigating double cover of the Lorentz group. We first write the Lagrangian consisting of the Einstein-Hilbert term, Dirac term and a scalar field term in a non-Riemannian spacetime with curvature and t... |
2402.03684 | Shuxun Tian | Changcheng Jing and Shuxun Tian and Zong-Hong Zhu | Early dark energy triggered by spacetime dynamics that encodes cosmic
radiation-matter transition | 9 pages, 7 figures, published in Phys. Rev. D | Phys. Rev. D 109, 044016 (2024) | 10.1103/PhysRevD.109.044016 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Early dark energy (EDE), introduced at the epoch of matter-radiation equality
to alleviate the Hubble tension, has posed a new coincidence problem: why EDE
appears at matter-radiation equality when their physics are completely
unrelated? To solve this coincidence problem, we propose a new EDE model based
on scalar-te... | [
{
"created": "Tue, 6 Feb 2024 04:13:50 GMT",
"version": "v1"
}
] | 2024-02-07 | [
[
"Jing",
"Changcheng",
""
],
[
"Tian",
"Shuxun",
""
],
[
"Zhu",
"Zong-Hong",
""
]
] | Early dark energy (EDE), introduced at the epoch of matter-radiation equality to alleviate the Hubble tension, has posed a new coincidence problem: why EDE appears at matter-radiation equality when their physics are completely unrelated? To solve this coincidence problem, we propose a new EDE model based on scalar-tens... |
1611.10074 | Mauro Pieroni | F. Cicciarella and M. Pieroni | Universality for quintessence | 21 pages + appendices, 23 figures | JCAP 1708 (2017) no.08, 010 | 10.1088/1475-7516/2017/08/010 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Several recent works suggested the possibility of describing inflation by
means of a renormalization group equation. In this paper we discuss the
application of these methods to models of quintessence. In this framework a
period of exponential expansion corresponds to the slow evolution of the scalar
field in the nei... | [
{
"created": "Wed, 30 Nov 2016 10:03:23 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Aug 2017 10:40:43 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Sep 2017 14:28:29 GMT",
"version": "v3"
}
] | 2017-09-08 | [
[
"Cicciarella",
"F.",
""
],
[
"Pieroni",
"M.",
""
]
] | Several recent works suggested the possibility of describing inflation by means of a renormalization group equation. In this paper we discuss the application of these methods to models of quintessence. In this framework a period of exponential expansion corresponds to the slow evolution of the scalar field in the neigh... |
gr-qc/9405040 | Claus Kiefer | D. Giulini and C. Kiefer | Wheeler-Dewitt Metric and the Attractivity of Gravity | LATEX, 6pages, slightly corrected and enlarged version, to appear in
Phys. Lett. A | Phys.Lett. A193 (1994) 21-24 | 10.1016/0375-9601(94)00651-2 | null | gr-qc | null | We investigate the class of ultralocal metrics on the configuration space of
canonical gravity. It is described by a parameter $\alpha$, where $\alpha=0.5$
corresponds to general relativity.
For $\alpha$ less than a critical value the signature is positive definite,
while for all other values it is indefinite. We s... | [
{
"created": "Wed, 18 May 1994 14:23:09 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Sep 1994 07:38:24 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Giulini",
"D.",
""
],
[
"Kiefer",
"C.",
""
]
] | We investigate the class of ultralocal metrics on the configuration space of canonical gravity. It is described by a parameter $\alpha$, where $\alpha=0.5$ corresponds to general relativity. For $\alpha$ less than a critical value the signature is positive definite, while for all other values it is indefinite. We show ... |
gr-qc/0405008 | Michael Petri | Michael Petri | On the thermodynamic origin of the Hawking entropy and a measurement of
the Hawking temperature | 27 pages, 1 figure | null | null | null | gr-qc astro-ph hep-th | null | In the spherically symmetric case the Einstein field equations take on their
simplest form for a matter-density rho = 1 / (8 pi r^2), from which a radial
metric coefficient g_{rr} \propto r follows. The boundary of an object with
such an interior matter-density is situated slightly outside of its
gravitational radius... | [
{
"created": "Sun, 2 May 2004 19:04:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Petri",
"Michael",
""
]
] | In the spherically symmetric case the Einstein field equations take on their simplest form for a matter-density rho = 1 / (8 pi r^2), from which a radial metric coefficient g_{rr} \propto r follows. The boundary of an object with such an interior matter-density is situated slightly outside of its gravitational radius. ... |
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