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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1601.02458 | Ovidiu Cristinel Stoica | Ovidiu Cristinel Stoica | Kaluza theory with zero-length extra dimensions | To appear in IJMPD | Int. J. Mod. Phys. D, 25(11), 1640004 (2016) | 10.1142/S0218271816400046 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new approach to the Kaluza theory and its relation to the gauge theory is
presented. Two degenerate metrics on the $4+d$-dimensional total manifold are
used, one corresponding to the spacetime metric and giving the fiber of the
gauge bundle, and the other one to the metric of the fiber and giving the
horizontal bun... | [
{
"created": "Mon, 11 Jan 2016 14:31:29 GMT",
"version": "v1"
}
] | 2016-11-03 | [
[
"Stoica",
"Ovidiu Cristinel",
""
]
] | A new approach to the Kaluza theory and its relation to the gauge theory is presented. Two degenerate metrics on the $4+d$-dimensional total manifold are used, one corresponding to the spacetime metric and giving the fiber of the gauge bundle, and the other one to the metric of the fiber and giving the horizontal bundl... |
1109.3769 | Sergey Yakovlev | Sergey V. Yakovlev | Investigation of anisotropic metric in multidimensional space-time and
generation of additional dimensions by scalar field | null | Modern Physics Letters A (2012) Vol.27, No. 15, 1250088 | 10.1142/S0217732312500885 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Were investigated anisotropic metric of higher dimensional space-time with
only cosmological term and scalar field. Showed, that presence of scalar field
is equivalent to anisotropic metric in the multy dimensional space-time and
proposed idea of dimensions generation by scalar field. Were solved Einstein's
equations... | [
{
"created": "Sat, 17 Sep 2011 10:26:25 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Dec 2011 18:05:25 GMT",
"version": "v2"
}
] | 2012-08-01 | [
[
"Yakovlev",
"Sergey V.",
""
]
] | Were investigated anisotropic metric of higher dimensional space-time with only cosmological term and scalar field. Showed, that presence of scalar field is equivalent to anisotropic metric in the multy dimensional space-time and proposed idea of dimensions generation by scalar field. Were solved Einstein's equations f... |
gr-qc/0612008 | Jorge Rueda | Jorge A Rueda H and L A Nunez | General Relativistic Radiant Shock Waves in the Post-Quasistatic
Approximation | To appear in Journal of Physics:Conference Series:"XXIX Spanish
Relativity Meeting (ERE 2006): Einstein's Legacy: From the Theoretical
Paradise to Astrophysical Observations" | J.Phys.Conf.Ser.66:012042,2007 | 10.1088/1742-6596/66/1/012042 | null | gr-qc | null | An evolution of radiant shock wave front is considered in the framework of a
recently presented method to study self-gravitating relativistic spheres, whose
rationale becomes intelligible and finds full justification within the context
of a suitable definition of the post-quasistatic approximation. The spherical
matt... | [
{
"created": "Fri, 1 Dec 2006 06:16:41 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"H",
"Jorge A Rueda",
""
],
[
"Nunez",
"L A",
""
]
] | An evolution of radiant shock wave front is considered in the framework of a recently presented method to study self-gravitating relativistic spheres, whose rationale becomes intelligible and finds full justification within the context of a suitable definition of the post-quasistatic approximation. The spherical matter... |
1408.0786 | Brett Bolen | Mir Emad Aghili, Brett Bolen, Luca Bombelli | Effect of Accelerated Global Expansion on Bending of Light | 12 pages, 4 figures | null | 10.1007/s10714-016-2175-6 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In 2007 Rindler and Ishak showed that, contrary to previous claims, the value
of the cosmological constant does have an effect on light deflection by a
gravitating object in an expanding universe, modeled by a
Schwarzschild-de~Sitter spacetime. In this paper we consider light bending in
the more general situation of ... | [
{
"created": "Mon, 4 Aug 2014 19:46:56 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Jun 2016 14:17:52 GMT",
"version": "v2"
}
] | 2018-05-25 | [
[
"Aghili",
"Mir Emad",
""
],
[
"Bolen",
"Brett",
""
],
[
"Bombelli",
"Luca",
""
]
] | In 2007 Rindler and Ishak showed that, contrary to previous claims, the value of the cosmological constant does have an effect on light deflection by a gravitating object in an expanding universe, modeled by a Schwarzschild-de~Sitter spacetime. In this paper we consider light bending in the more general situation of a ... |
2404.08553 | Nosratollah Jafari Sonbolabadi | Nosratollah Jafari | Evolution of the concept of the curvature in the momentum space | 10 pages | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We review the history of the curved momentum space from Max Born to the
recent relative locality, \k{appa}-Poincare and noncommutative geometric
proposals. We found that the concept of the curvature in the momentum space and
motivations has been evolved during 80 years from the Max Born time.
Motivations has been evo... | [
{
"created": "Tue, 9 Apr 2024 02:06:38 GMT",
"version": "v1"
}
] | 2024-04-15 | [
[
"Jafari",
"Nosratollah",
""
]
] | We review the history of the curved momentum space from Max Born to the recent relative locality, \k{appa}-Poincare and noncommutative geometric proposals. We found that the concept of the curvature in the momentum space and motivations has been evolved during 80 years from the Max Born time. Motivations has been evolv... |
1701.04773 | Salvador Robles-Perez | Salvador Robles-Perez, Adam Balcerzak, Mariusz P. Dabrowski, Manuel
Kraemer | Inter-universal entanglement in a cyclic multiverse | 12 pages, 11 figures. A new section (Sect. V) has been added with
some remarks on the thermodynamics of entanglement and its observational
consequences. Some minor typos have been corrected | Phys. Rev. D 95, 083505 (2017) | 10.1103/PhysRevD.95.083505 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study scenarios of parallel cyclic multiverses which allow for a different
evolution of the physical constants, while having the same geometry. These
universes are classically disconnected, but quantum-mechanically entangled.
Applying the thermodynamics of entanglement, we calculate the temperature and
the entropy... | [
{
"created": "Tue, 17 Jan 2017 17:21:09 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Apr 2017 07:58:58 GMT",
"version": "v2"
}
] | 2017-04-25 | [
[
"Robles-Perez",
"Salvador",
""
],
[
"Balcerzak",
"Adam",
""
],
[
"Dabrowski",
"Mariusz P.",
""
],
[
"Kraemer",
"Manuel",
""
]
] | We study scenarios of parallel cyclic multiverses which allow for a different evolution of the physical constants, while having the same geometry. These universes are classically disconnected, but quantum-mechanically entangled. Applying the thermodynamics of entanglement, we calculate the temperature and the entropy o... |
0903.3489 | Julian Barbour | Julian Barbour | The Nature of Time | 9 pages, no figures. This article won the first prize awarded on 7th
March 2009 by the jury in the essay competition of the Foundational Questions
Institute (fqxi.org) on The Nature of Time | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A review of some basic facts of classical dynamics shows that time, or
precisely duration, is redundant as a fundamental concept. Duration and the
behaviour of clocks emerge from a timeless law that governs change.
| [
{
"created": "Fri, 20 Mar 2009 10:31:50 GMT",
"version": "v1"
}
] | 2009-03-23 | [
[
"Barbour",
"Julian",
""
]
] | A review of some basic facts of classical dynamics shows that time, or precisely duration, is redundant as a fundamental concept. Duration and the behaviour of clocks emerge from a timeless law that governs change. |
gr-qc/9911119 | William A. Hiscock | Brett E. Taylor, William A. Hiscock, and Paul R. Anderson | Semiclassical charged black holes with a quantized massive scalar field | 19 pages; 1 figure; ReVTeX | Phys.Rev. D61 (2000) 084021 | 10.1103/PhysRevD.61.084021 | MSUPHY99.05 | gr-qc | null | Semiclassical perturbations to the Reissner-Nordstrom metric caused by the
presence of a quantized massive scalar field with arbitrary curvature coupling
are found to first order in \epsilon = \hbar/M^2. The DeWitt-Schwinger
approximation is used to determine the vacuum stress-energy tensor of the
massive scalar fiel... | [
{
"created": "Mon, 29 Nov 1999 21:29:44 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Taylor",
"Brett E.",
""
],
[
"Hiscock",
"William A.",
""
],
[
"Anderson",
"Paul R.",
""
]
] | Semiclassical perturbations to the Reissner-Nordstrom metric caused by the presence of a quantized massive scalar field with arbitrary curvature coupling are found to first order in \epsilon = \hbar/M^2. The DeWitt-Schwinger approximation is used to determine the vacuum stress-energy tensor of the massive scalar field.... |
0804.3233 | Rong-Gen Cai | Zhong-Hua Li, Bin Hu and Rong-Gen Cai | A Note on Self-gravitating Radiation in AdS Spacetime | Revtex, 13 pages with 8 eps figures, to appear in PRD; v2: typos
corrected and the version in PRD | Phys.Rev.D77:104032,2008 | 10.1103/PhysRevD.77.104032 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we investigate the equilibrium self-gravitating radiation in
higher dimensional, plane symmetric anti-de Sitter space. We find that there
exist essential differences from the spherically symmetric case: In each
dimension ($d\geq 4$), there are maximal mass (density), maximal entropy
(density) and maxima... | [
{
"created": "Mon, 21 Apr 2008 03:59:13 GMT",
"version": "v1"
},
{
"created": "Thu, 29 May 2008 00:56:07 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Li",
"Zhong-Hua",
""
],
[
"Hu",
"Bin",
""
],
[
"Cai",
"Rong-Gen",
""
]
] | In this paper we investigate the equilibrium self-gravitating radiation in higher dimensional, plane symmetric anti-de Sitter space. We find that there exist essential differences from the spherically symmetric case: In each dimension ($d\geq 4$), there are maximal mass (density), maximal entropy (density) and maximal ... |
1306.4426 | Shin'ichi Nojiri | Shin'Ichi Nojiri and Sergei D. Odintsov | Accelerating cosmology in modified gravity: from convenient $F(R)$ or
string-inspired theory to bimetric $F(R)$ gravity | LaTeX 23 pages, contribution to the proceedings of "49th Winter
School of Theoretical Physics Cosmology and non-equilibrium statistical
mechanics", L{\ka}dek-Zdr\'oj, Poland, February 10-16, 2013 | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider modified gravity which may describe the early-time inflation
and/or late-time cosmic acceleration of the universe. In particular, we discuss
the properties of $F(R)$, $F(G)$, string-inspired and
scalar-Einstein-Gauss-Bonnet gravities, including their FRW equations and fluid
or scalar-tensor description. S... | [
{
"created": "Wed, 19 Jun 2013 05:23:57 GMT",
"version": "v1"
}
] | 2013-06-20 | [
[
"Nojiri",
"Shin'Ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
]
] | We consider modified gravity which may describe the early-time inflation and/or late-time cosmic acceleration of the universe. In particular, we discuss the properties of $F(R)$, $F(G)$, string-inspired and scalar-Einstein-Gauss-Bonnet gravities, including their FRW equations and fluid or scalar-tensor description. Sim... |
gr-qc/0507106 | Bianca Dittrich | B. Dittrich | Partial and Complete Observables for Canonical General Relativity | 33 pages | Class.Quant.Grav. 23 (2006) 6155-6184 | 10.1088/0264-9381/23/22/006 | AEI-2005-128 | gr-qc | null | In this work we will consider the concepts of partial and complete
observables for canonical general relativity. These concepts provide a method
to calculate Dirac observables. The central result of this work is that one can
compute Dirac observables for general relativity by dealing with just one
constraint. For thi... | [
{
"created": "Mon, 25 Jul 2005 16:55:05 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Dittrich",
"B.",
""
]
] | In this work we will consider the concepts of partial and complete observables for canonical general relativity. These concepts provide a method to calculate Dirac observables. The central result of this work is that one can compute Dirac observables for general relativity by dealing with just one constraint. For this ... |
1801.03178 | James T. Wheeler | James T. Wheeler | Weyl geometry | 27 pp Minor notational changes, additional example and conclusion
added | Gen Relativ Gravit (2018) 50:80 | 10.1007/s10714-018-2401-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop the properties of Weyl geometry, beginning with a review of the
conformal properties of Riemannian spacetimes. Decomposition of the Riemann
curvature into trace and traceless parts allows an easy proof that the Weyl
curvature tensor is the conformally invariant part of the Riemann curvature,
and shows the ... | [
{
"created": "Tue, 9 Jan 2018 23:08:51 GMT",
"version": "v1"
},
{
"created": "Sat, 26 May 2018 18:34:35 GMT",
"version": "v2"
}
] | 2018-06-19 | [
[
"Wheeler",
"James T.",
""
]
] | We develop the properties of Weyl geometry, beginning with a review of the conformal properties of Riemannian spacetimes. Decomposition of the Riemann curvature into trace and traceless parts allows an easy proof that the Weyl curvature tensor is the conformally invariant part of the Riemann curvature, and shows the ex... |
gr-qc/9808056 | Hyeong-Chan Kim | Hyeong-Chan Kim (Sung Kyun Kwan Univ.) | Quantum field and uniformly accelerated oscillator | 28 pages, LaTeX | Phys.Rev. D59 (1999) 064024 | 10.1103/PhysRevD.59.064024 | null | gr-qc | null | We present an exact treatment of the influences on a quantum scalar field in
its Minkowski vacuum state induced by coupling of the field to a uniformly
accelerated harmonic oscillator. We show that there are no radiation from the
oscillator in the point of view of a uniformly accelerating observer. On the
other hand,... | [
{
"created": "Thu, 20 Aug 1998 16:24:41 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Kim",
"Hyeong-Chan",
"",
"Sung Kyun Kwan Univ."
]
] | We present an exact treatment of the influences on a quantum scalar field in its Minkowski vacuum state induced by coupling of the field to a uniformly accelerated harmonic oscillator. We show that there are no radiation from the oscillator in the point of view of a uniformly accelerating observer. On the other hand, t... |
2404.08576 | Quirijn Meijer | Quirijn Meijer, Sarah Caudill | Fast Waveform Generation for Gravitational Waves using Evolutionary
Algorithms | 15 pages, 11 figures | null | null | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave analyses depend heavily on waveforms that model the
evolution of compact binary coalescences as seen by observing detectors. In
many cases these waveforms are given by waveform approximants, models that
approximate the power of the waveform at a set of frequencies. Because of their
omnipresence, im... | [
{
"created": "Fri, 12 Apr 2024 16:22:08 GMT",
"version": "v1"
}
] | 2024-04-15 | [
[
"Meijer",
"Quirijn",
""
],
[
"Caudill",
"Sarah",
""
]
] | Gravitational-wave analyses depend heavily on waveforms that model the evolution of compact binary coalescences as seen by observing detectors. In many cases these waveforms are given by waveform approximants, models that approximate the power of the waveform at a set of frequencies. Because of their omnipresence, impr... |
1410.4172 | Ali Reza Amani | Ali R. Amani and A. Samiee-Nouri | Logarithmic entropy corrected holographic dark energy with $F(R,T)$
gravity | 12 pages, 8 figures | Commun. Theor. Phys. 64 (2015) 485-490 | 10.1088/0253-6102/64/4/485 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have considered $F(R,T)$ gravity as a linear function of
the curvature and torsion scalars and interacted it with logarithmic entropy
corrected holographic dark energy to evaluate cosmology solutions. The model
has been investigated by FRW metric, and then the energy density and the
pressure of dark... | [
{
"created": "Mon, 13 Oct 2014 20:32:05 GMT",
"version": "v1"
}
] | 2016-04-27 | [
[
"Amani",
"Ali R.",
""
],
[
"Samiee-Nouri",
"A.",
""
]
] | In this paper, we have considered $F(R,T)$ gravity as a linear function of the curvature and torsion scalars and interacted it with logarithmic entropy corrected holographic dark energy to evaluate cosmology solutions. The model has been investigated by FRW metric, and then the energy density and the pressure of dark e... |
gr-qc/0501058 | Orfeu Bertolami | Orfeu Bertolami | Noncommutative scalar field minimally coupled to gravity | Talk presented at the Workshop on Quantum Gravity and Noncommutative
Geometry, 20-23 July 2004, Universidade Lus\'ofona, Lisbon, Portugal. To
appear at Int. J. Mod. Phys. A | Mod.Phys.Lett. A20 (2005) 1359 | 10.1142/S0217732305017810 | null | gr-qc | null | A model for noncommutative scalar fields coupled to gravity based on the
generalization of the Moyal product is proposed. Solutions compatible with
homogeneous and isotropic flat Robertson-Walker spaces to first non-trivial
order in the perturbation of the star-product are presented. It is shown that
in the context o... | [
{
"created": "Wed, 19 Jan 2005 13:55:21 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Bertolami",
"Orfeu",
""
]
] | A model for noncommutative scalar fields coupled to gravity based on the generalization of the Moyal product is proposed. Solutions compatible with homogeneous and isotropic flat Robertson-Walker spaces to first non-trivial order in the perturbation of the star-product are presented. It is shown that in the context of ... |
2008.13370 | Daniel R Terno | Pravin Kumar Dahal and Daniel R. Terno | Kerr-Vaidya black holes | 9 pages, 1 figure. Published version | Phys. Rev. D 102, 124032 (2020) | 10.1103/PhysRevD.102.124032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Kerr-Vaidya metrics are the simplest nonstationary extensions of the Kerr
metric. We explore their properties and compare them with the near-horizon
limits of the spherically symmetric self-consistent solutions (the ingoing
Vaidya metric with decreasing mass and the outgoing Vaidya metric with
increasing mass) for th... | [
{
"created": "Mon, 31 Aug 2020 05:16:00 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Sep 2020 05:29:23 GMT",
"version": "v2"
},
{
"created": "Tue, 15 Dec 2020 22:30:44 GMT",
"version": "v3"
}
] | 2020-12-17 | [
[
"Dahal",
"Pravin Kumar",
""
],
[
"Terno",
"Daniel R.",
""
]
] | Kerr-Vaidya metrics are the simplest nonstationary extensions of the Kerr metric. We explore their properties and compare them with the near-horizon limits of the spherically symmetric self-consistent solutions (the ingoing Vaidya metric with decreasing mass and the outgoing Vaidya metric with increasing mass) for the ... |
2204.13405 | Etienne Savalle | Etienne Savalle, Jonathan Gair, Lorenzo Speri and Stanislav Babak | Known unknowns: assessing the impact of instrumental calibration
uncertainty on LISA science | 25 pages, 15 figures | null | 10.1103/PhysRevD.106.022003 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The primary scientific results of the future space-based gravitational wave
interferometer LISA will come from the parameter inference of a large variety
of gravitational wave sources. However, the presence of calibration errors
could potentially degrade the measurement precision of the system parameters.
Here, we as... | [
{
"created": "Thu, 28 Apr 2022 10:50:09 GMT",
"version": "v1"
}
] | 2022-08-31 | [
[
"Savalle",
"Etienne",
""
],
[
"Gair",
"Jonathan",
""
],
[
"Speri",
"Lorenzo",
""
],
[
"Babak",
"Stanislav",
""
]
] | The primary scientific results of the future space-based gravitational wave interferometer LISA will come from the parameter inference of a large variety of gravitational wave sources. However, the presence of calibration errors could potentially degrade the measurement precision of the system parameters. Here, we asse... |
1502.01677 | John W. Moffat | J. W. Moffat | Modified Gravity Black Holes and their Observable Shadows | 5 pages, 2 figures | European Physics Journal C (2015) 75:130 | 10.1140/epjc/s10052-015-3352-6 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The shadows cast by non-rotating and rotating modified gravity (MOG) black
holes are determined by the two parameters mass $M$ and angular momentum
$J=Ma$. The sizes of the shadows cast by the spherically symmetric static
Schwarzschild-MOG and Kerr-MOG rotating black holes increase significantly as
the free parameter... | [
{
"created": "Wed, 4 Feb 2015 19:01:59 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Feb 2015 14:38:32 GMT",
"version": "v2"
}
] | 2015-03-26 | [
[
"Moffat",
"J. W.",
""
]
] | The shadows cast by non-rotating and rotating modified gravity (MOG) black holes are determined by the two parameters mass $M$ and angular momentum $J=Ma$. The sizes of the shadows cast by the spherically symmetric static Schwarzschild-MOG and Kerr-MOG rotating black holes increase significantly as the free parameter $... |
1604.04015 | Stanley Deser | S. Deser | Massive to gauge field reduction and gravitational wave zone information | Expanded version, Physics unchanged | GenRelGrav 48 (2016) 103 | 10.1007/s10714-016-2096-4 | BRX-TH 6395; CALT-TH2016-006 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show explicitly that massive, Abelian, vector, just like (properly
defined) massive tensor, fields limit smoothly to their massless, gauge,
versions: they emit only maximal helicity radiation and mediate Coulomb and
(special relativistic) Newtonian, forces between their (conserved) sources. Our
main motivation, th... | [
{
"created": "Thu, 14 Apr 2016 02:25:11 GMT",
"version": "v1"
},
{
"created": "Thu, 19 May 2016 04:22:36 GMT",
"version": "v2"
}
] | 2016-09-28 | [
[
"Deser",
"S.",
""
]
] | We show explicitly that massive, Abelian, vector, just like (properly defined) massive tensor, fields limit smoothly to their massless, gauge, versions: they emit only maximal helicity radiation and mediate Coulomb and (special relativistic) Newtonian, forces between their (conserved) sources. Our main motivation, thou... |
gr-qc/0511061 | Rafael Porto A. | Rafael A. Porto | Post-Newtonian corrections to the motion of spinning bodies in NRGR | 18 pages, 9 figures. Typos corrected, to appear in Physical Review D | Phys.Rev.D73:104031,2006 | 10.1103/PhysRevD.73.104031 | CMU-TH-05-10 | gr-qc astro-ph | null | In this paper we include spin and multipole moment effects in the formalism
used to describe the motion of extended objects recently introduced in
hep-th/0409156. A suitable description for spinning bodies is developed and
spin-orbit, spin-spin and quadrupole-spin Hamiltonians are found at leading
order. The existenc... | [
{
"created": "Sun, 13 Nov 2005 20:26:48 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Mar 2006 20:22:58 GMT",
"version": "v2"
},
{
"created": "Thu, 20 Apr 2006 19:16:28 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Porto",
"Rafael A.",
""
]
] | In this paper we include spin and multipole moment effects in the formalism used to describe the motion of extended objects recently introduced in hep-th/0409156. A suitable description for spinning bodies is developed and spin-orbit, spin-spin and quadrupole-spin Hamiltonians are found at leading order. The existence ... |
gr-qc/0202070 | Wu Shuangqin | S. Q. Wu and X. Cai | Hawking Radiation of Dirac Particles in an Arbitrarily Accelerating
Kinnersley Black Hole | Revtex, 12pt, 16 pages, no figure, to appear in Gen. Rel. Grav. 34
(2002) N0. 8 | Gen.Rel.Grav. 34 (2002) 1207-1220 | 10.1023/A:1019774417274 | null | gr-qc | null | Quantum thermal effect of Dirac particles in an arbitrarily accelerating
Kinnersley black hole is investigated by using the method of generalized
tortoise coordinate transformation. Both the location and the temperature of
the event horizon depend on the advanced time and the angles. The Hawking
thermal radiation spe... | [
{
"created": "Wed, 20 Feb 2002 08:18:20 GMT",
"version": "v1"
}
] | 2021-10-20 | [
[
"Wu",
"S. Q.",
""
],
[
"Cai",
"X.",
""
]
] | Quantum thermal effect of Dirac particles in an arbitrarily accelerating Kinnersley black hole is investigated by using the method of generalized tortoise coordinate transformation. Both the location and the temperature of the event horizon depend on the advanced time and the angles. The Hawking thermal radiation spect... |
gr-qc/9404056 | null | Boro Grubisic | Velocity Dominance Near a Crushing Singularity | 5 pages, preprint YCTP-P6-94, to appear in the Lanczos Centenary
Proceedings, LaTeX | null | null | null | gr-qc | null | The asymptotic behavior of geometry near the boundary of maximal Cauchy
development is studied using a perturbative method, which at the zeroth order
reduces Einstein's equations to an exactly solvable set of
equations---Einstein's equations with all ``space" derivatives dropped. The
perturbative equations are solved... | [
{
"created": "Wed, 27 Apr 1994 23:48:08 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Grubisic",
"Boro",
""
]
] | The asymptotic behavior of geometry near the boundary of maximal Cauchy development is studied using a perturbative method, which at the zeroth order reduces Einstein's equations to an exactly solvable set of equations---Einstein's equations with all ``space" derivatives dropped. The perturbative equations are solved t... |
2003.10915 | Arvin Ravanpak | Arvin Ravanpak and Golnaz Farpour Fadakar | The Stability Analysis of Brane Induced Gravity with Quintessence Field
on the Brane with a Gaussian Potential | null | International Journal of Modern Physics D, Vol. 30, No. 01,
2150006 (2021) | 10.1142/S0218271821500061 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider a normal branch of the DGP cosmological model with
a quintessence scalar field on the brane as the dark energy component. Using
the dynamical system approach, we study the stability properties of the model.
We find that {\lambda}, as one of our new dimensionless variables which is
defined i... | [
{
"created": "Tue, 24 Mar 2020 15:12:24 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Feb 2021 19:30:28 GMT",
"version": "v2"
}
] | 2021-02-24 | [
[
"Ravanpak",
"Arvin",
""
],
[
"Fadakar",
"Golnaz Farpour",
""
]
] | In this paper, we consider a normal branch of the DGP cosmological model with a quintessence scalar field on the brane as the dark energy component. Using the dynamical system approach, we study the stability properties of the model. We find that {\lambda}, as one of our new dimensionless variables which is defined in ... |
gr-qc/9911114 | Pestov | Ivangoe B. Pestov | Gauge Theory of Oriented Media | LATeX, 9 pages, no figures and tables | J.Phys.A33:3027-3032,2000 | 10.1088/0305-4470/33/15/309 | null | gr-qc cond-mat | null | The concept of wave field is introduced to represent oriented media. The wave
field is a tensor field of second rank, and directors are its eigenvectors.
This exhibition of directors defines a natural gauge group inherit in continua
and allows one to derive from variational principle general relativistic and
gauge in... | [
{
"created": "Mon, 29 Nov 1999 08:51:48 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Pestov",
"Ivangoe B.",
""
]
] | The concept of wave field is introduced to represent oriented media. The wave field is a tensor field of second rank, and directors are its eigenvectors. This exhibition of directors defines a natural gauge group inherit in continua and allows one to derive from variational principle general relativistic and gauge inva... |
0802.3838 | Alfredo Sandoval-Villalbazo | A. L. Garcia-Perciante, L. S. Garcia-Colin, A. Sandoval-Villalbazo | On the nature of the so-called generic instabilities in dissipative
relativistic hydrodynamics | 13 pages, no figures. Accepted for publication in GRG | General Relativity and Gravitation 41:1645-1654 (2009) | 10.1007/s10714-008-0735-0 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the so-called generic instabilities that appear in the
framework of relativistic linear irreversible thermodynamics, describing the
fluctuations of a simple fluid close to equilibrium, arise due to the coupling
of heat with hydrodynamic acceleration which appears in Eckart's formalism of
relativistic... | [
{
"created": "Tue, 26 Feb 2008 16:40:31 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Nov 2008 21:04:13 GMT",
"version": "v2"
}
] | 2009-07-31 | [
[
"Garcia-Perciante",
"A. L.",
""
],
[
"Garcia-Colin",
"L. S.",
""
],
[
"Sandoval-Villalbazo",
"A.",
""
]
] | It is shown that the so-called generic instabilities that appear in the framework of relativistic linear irreversible thermodynamics, describing the fluctuations of a simple fluid close to equilibrium, arise due to the coupling of heat with hydrodynamic acceleration which appears in Eckart's formalism of relativistic i... |
2311.06068 | Christiane Klein | Christiane Klein, Jochen Zahn | Long-range correlations of the stress tensor near the Cauchy horizon | 5 pages, 4 figures, version as published in PRD | Phys.Rev.D 109 (2024) 6, L061702 | 10.1103/PhysRevD.109.L061702 | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | We show that the stress tensor of a real scalar quantum field on
Reissner-Nordstr{\"o}m-de Sitter spacetime exhibits correlations over
macroscopic distances near the Cauchy horizon. These diverge as the Cauchy
horizon is approached and are universal, i.e., state-independent. This signals
a breakdown of the semi-class... | [
{
"created": "Fri, 10 Nov 2023 14:03:40 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Apr 2024 11:33:44 GMT",
"version": "v2"
}
] | 2024-04-03 | [
[
"Klein",
"Christiane",
""
],
[
"Zahn",
"Jochen",
""
]
] | We show that the stress tensor of a real scalar quantum field on Reissner-Nordstr{\"o}m-de Sitter spacetime exhibits correlations over macroscopic distances near the Cauchy horizon. These diverge as the Cauchy horizon is approached and are universal, i.e., state-independent. This signals a breakdown of the semi-classic... |
2012.07358 | T.G Zlosnik | Jo\~ao Magueijo, Tom Zlosnik | Quantum torsion and a Hartle-Hawking "beam'' | null | Phys. Rev. D 103, 104008 (2021) | 10.1103/PhysRevD.103.104008 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the Einstein-Cartan framework the torsion-free conditions arise within the
Hamiltonian treatment as second-class constraints. The standard strategy is to
solve these constraints, eliminating the torsion from the classical theory,
before quantization. Here we advocate leaving the torsion inside the other
constraint... | [
{
"created": "Mon, 14 Dec 2020 09:18:59 GMT",
"version": "v1"
}
] | 2021-05-12 | [
[
"Magueijo",
"João",
""
],
[
"Zlosnik",
"Tom",
""
]
] | In the Einstein-Cartan framework the torsion-free conditions arise within the Hamiltonian treatment as second-class constraints. The standard strategy is to solve these constraints, eliminating the torsion from the classical theory, before quantization. Here we advocate leaving the torsion inside the other constraints ... |
1603.07075 | Sabine Hossenfelder | S. Hossenfelder | Static Scalar Field Solutions in Symmetric Gravity | 13 pages, 3 figures, replaced with published version | CQG 33, 18 (2016) | 10.1088/0264-9381/33/18/185008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a family of exact solutions for bi-metric gravity with an exchange
symmetry between the two metrics. In this two-parameter family of solutions the
gravitational field is sourced by a time-independent massless scalar field. We
find that the only limit in which the scalar field entirely vanishes is flat
space... | [
{
"created": "Wed, 23 Mar 2016 06:21:14 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Sep 2016 14:19:45 GMT",
"version": "v2"
}
] | 2016-10-03 | [
[
"Hossenfelder",
"S.",
""
]
] | We derive a family of exact solutions for bi-metric gravity with an exchange symmetry between the two metrics. In this two-parameter family of solutions the gravitational field is sourced by a time-independent massless scalar field. We find that the only limit in which the scalar field entirely vanishes is flat space. ... |
1009.6172 | Jonathan R. Gair | Jonathan R Gair, Alberto Sesana, Emanuele Berti and Marta Volonteri | Constraining properties of the black hole population using LISA | 12 pages, 3 figures, submitted to Class. Quantum Grav. for
proceedings of 8th LISA Symposium; v2 minor changes for consistency with
accepted version | Class.Quant.Grav.28:094018,2011 | 10.1088/0264-9381/28/9/094018 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | LISA should detect gravitational waves from tens to hundreds of systems
containing black holes with mass in the range from 10 thousand to 10 million
solar masses. Black holes in this mass range are not well constrained by
current electromagnetic observations, so LISA could significantly enhance our
understanding of t... | [
{
"created": "Thu, 30 Sep 2010 15:49:42 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Nov 2010 11:28:09 GMT",
"version": "v2"
}
] | 2011-04-22 | [
[
"Gair",
"Jonathan R",
""
],
[
"Sesana",
"Alberto",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Volonteri",
"Marta",
""
]
] | LISA should detect gravitational waves from tens to hundreds of systems containing black holes with mass in the range from 10 thousand to 10 million solar masses. Black holes in this mass range are not well constrained by current electromagnetic observations, so LISA could significantly enhance our understanding of the... |
gr-qc/0111051 | Giovanni Imponente | Giovanni Paolo Imponente and Giovanni Montani | On the Quantum Origin of the Mixmaster Chaos Covariance | 8 pages, to appear on Nucl.Phys.B, Proc.Suppl., Proceedings of the
International Meeting on Quantum Gravity and Spectral Geometry, Naples, 2-7
July 2001 | Nucl.Phys.Proc.Suppl. 104 (2002) 193-196 | 10.1016/S0920-5632(01)01612-7 | null | gr-qc astro-ph | null | Our analysis shows how the covariant chaotic behavior characterizing the
evolution of the Mixmaster cosmology near the initial singularity can be taken
as the semiclassical limit in the canonical quantization performed by the
corresponding Hamiltonian representation.
| [
{
"created": "Fri, 16 Nov 2001 17:13:35 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Imponente",
"Giovanni Paolo",
""
],
[
"Montani",
"Giovanni",
""
]
] | Our analysis shows how the covariant chaotic behavior characterizing the evolution of the Mixmaster cosmology near the initial singularity can be taken as the semiclassical limit in the canonical quantization performed by the corresponding Hamiltonian representation. |
0807.0435 | Lorenzo Iorio | Lorenzo Iorio | Advances in the measurement of the Lense-Thirring effect with planetary
motions in the field of the Sun | aastex macros, 14 pages, 1 table, no figures. Accepted by Scholarly
Research Exchange (SYREXE). Please, feel free to rate the paper at SYREXE
website, if you want | Scholarly Research Exchange, vol. 2008, article ID 105235 | 10.3814/2008/105235 | null | gr-qc astro-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | E.V. Pitjeva, by processing more than 400,000 planetary observations of
various types with the dynamical models of the EPM2006 ephemerides, recently
estimated a correction to the canonical Newtonian-Einsteinian Venus' perihelion
precession of -0.0004 +/- 0.0001 arcseconds per century. The prediction of
general relati... | [
{
"created": "Wed, 2 Jul 2008 19:53:28 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Jul 2008 10:19:36 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Jul 2008 21:24:52 GMT",
"version": "v3"
},
{
"created": "Sat, 11 Oct 2008 18:33:49 GMT",
"version": "v4"
}
] | 2008-10-27 | [
[
"Iorio",
"Lorenzo",
""
]
] | E.V. Pitjeva, by processing more than 400,000 planetary observations of various types with the dynamical models of the EPM2006 ephemerides, recently estimated a correction to the canonical Newtonian-Einsteinian Venus' perihelion precession of -0.0004 +/- 0.0001 arcseconds per century. The prediction of general relativi... |
1807.03275 | Loic Rolland | Virgo Collaboration: F. Acernese, T. Adams, K. Agatsuma, L. Aiello, A.
Allocca, M.A. Aloy, A. Amato, S. Antier, M. Ar\`ene, N. Arnaud, S. Ascenzi,
P. Astone, F. Aubin, S. Babak, P. Bacon, F. Badaracco, M.K.M. Bader, F.
Baldaccini, G. Ballardin, F. Barone, M. Barsuglia, D. Barta, A. Basti, M.
Bawaj, M. Bazzan, M... | Calibration of Advanced Virgo and Reconstruction of the Gravitational
Wave Signal h(t) during the Observing Run O2 | 20 pages, 6 figures. Submitted to Classical and Quantum Gravity.
Version updated after referees' comments | null | 10.1088/1361-6382/aadf1a | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In August 2017, Advanced Virgo joined Advanced LIGO for the end of the O2
run, leading to the first gravitational waves detections with the
three-detector network. This paper describes the Advanced Virgo calibration and
the gravitational wave strain h(t) reconstruction during O2. The methods are
the same as the ones ... | [
{
"created": "Mon, 9 Jul 2018 17:13:49 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Sep 2018 09:25:47 GMT",
"version": "v2"
}
] | 2021-11-10 | [
[
"Virgo Collaboration",
"",
""
],
[
"Acernese",
"F.",
""
],
[
"Adams",
"T.",
""
],
[
"Agatsuma",
"K.",
""
],
[
"Aiello",
"L.",
""
],
[
"Allocca",
"A.",
""
],
[
"Aloy",
"M. A.",
""
],
[
"Amato",
"... | In August 2017, Advanced Virgo joined Advanced LIGO for the end of the O2 run, leading to the first gravitational waves detections with the three-detector network. This paper describes the Advanced Virgo calibration and the gravitational wave strain h(t) reconstruction during O2. The methods are the same as the ones de... |
gr-qc/0410006 | Miguel S\'anchez | Jos\'e Luis Flores and Miguel S\'anchez | On the geometry of pp-wave type spacetimes | 19 pages, Proceedings of the March-2004 Heraeus Seminar "Mathematical
Relativity: New ideas and developments" | Lect.Notes Phys. 692 (2006) 79-98 | 10.1007/11550259_4 | null | gr-qc hep-th | null | Global geometric properties of product manifolds ${\cal M}= M \times \R^2$,
endowed with a metric type $<\cdot, \cdot > = < \cdot, \cdot >_R + 2 dudv +
H(x,u) du^2$ (where $<\cdot, \cdot >_R$ is a Riemannian metric on $M$ and $H:M
\times \R \to \R$ a function), which generalize classical plane waves, are
revisited. O... | [
{
"created": "Fri, 1 Oct 2004 19:00:06 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Flores",
"José Luis",
""
],
[
"Sánchez",
"Miguel",
""
]
] | Global geometric properties of product manifolds ${\cal M}= M \times \R^2$, endowed with a metric type $<\cdot, \cdot > = < \cdot, \cdot >_R + 2 dudv + H(x,u) du^2$ (where $<\cdot, \cdot >_R$ is a Riemannian metric on $M$ and $H:M \times \R \to \R$ a function), which generalize classical plane waves, are revisited. Our... |
1106.0559 | Wenbiao Liu | Shi-Wei Zhou, Xiao-Xiong Zeng, Wen-Biao Liu | Hawking radiation from a BTZ black hole viewed as Landauer transport | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Viewing Hawking radiation as a 1D single quantum channel Landauer transport
process, Nation et al calculated the energy flux and entropy flux from a
Schwarzschild black hole without chemical potential. To generalize the method
to the case with chemical potential, a rotating charged and non-charged BTZ
black hole is i... | [
{
"created": "Fri, 3 Jun 2011 03:39:56 GMT",
"version": "v1"
}
] | 2011-06-06 | [
[
"Zhou",
"Shi-Wei",
""
],
[
"Zeng",
"Xiao-Xiong",
""
],
[
"Liu",
"Wen-Biao",
""
]
] | Viewing Hawking radiation as a 1D single quantum channel Landauer transport process, Nation et al calculated the energy flux and entropy flux from a Schwarzschild black hole without chemical potential. To generalize the method to the case with chemical potential, a rotating charged and non-charged BTZ black hole is inv... |
0709.3193 | Archan S. Majumdar | A. S. Majumdar, D. Gangopadhyay, L. P. Singh | Evolution of primordial black holes in Jordan-Brans-Dicke cosmology | 5 pages, Latex; uses MNRAS stylefiles; minor changes; accepted for
publication in MNRAS | null | 10.1111/j.1365-2966.2008.12925.x | null | gr-qc | null | We consider the evolution of primordial black holes in a generalyzed
Jordan-Brans-Dicke cosmological model where both the Brans-Dicke scalar field
and its coupling to gravity are dynamical functions determined from the
evolution equations. The evaporation rate for the black holes changes compared
to that in standard ... | [
{
"created": "Thu, 20 Sep 2007 11:18:04 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jan 2008 07:17:00 GMT",
"version": "v2"
}
] | 2009-11-13 | [
[
"Majumdar",
"A. S.",
""
],
[
"Gangopadhyay",
"D.",
""
],
[
"Singh",
"L. P.",
""
]
] | We consider the evolution of primordial black holes in a generalyzed Jordan-Brans-Dicke cosmological model where both the Brans-Dicke scalar field and its coupling to gravity are dynamical functions determined from the evolution equations. The evaporation rate for the black holes changes compared to that in standard co... |
2212.13403 | Nahid Ahmadi | Ali Mohammadi, Nahid Ahmadi, Mehdi Shokri | On the constant roll complex scalar field inflationary models | 26 pages, 6 figures | JCAP06(2023)058 | 10.1088/1475-7516/2023/06/058 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we wish to point out the possibility of using a complex scalar
field in a constant roll inflationary model, as needed for observational
viability. We extend the idea of real field inflaton with constant rate of roll
to a complex field, showing the feasibility of solving Einstein Klein-Gordon
equations c... | [
{
"created": "Tue, 27 Dec 2022 08:21:59 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Jul 2023 14:13:29 GMT",
"version": "v2"
}
] | 2023-07-04 | [
[
"Mohammadi",
"Ali",
""
],
[
"Ahmadi",
"Nahid",
""
],
[
"Shokri",
"Mehdi",
""
]
] | In this paper we wish to point out the possibility of using a complex scalar field in a constant roll inflationary model, as needed for observational viability. We extend the idea of real field inflaton with constant rate of roll to a complex field, showing the feasibility of solving Einstein Klein-Gordon equations con... |
2206.02053 | Zhi-Wei Wang | Zhi-Wei Wang, Saurya Das, and Samuel L. Braunstein | Black holes, fast scrambling and the breakdown of the equivalence
principle | 16 pages, 2 figures | null | null | null | gr-qc astro-ph.HE hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes are conjectured to be the fastest quantum scramblers in nature,
with the stretched horizon being the scrambling boundary. Under this
assumption, we show that any infalling body must couple to virtually the entire
black hole Hilbert space even prior to the Page time in order for there to be
any hope of pre... | [
{
"created": "Sat, 4 Jun 2022 19:54:28 GMT",
"version": "v1"
}
] | 2022-06-07 | [
[
"Wang",
"Zhi-Wei",
""
],
[
"Das",
"Saurya",
""
],
[
"Braunstein",
"Samuel L.",
""
]
] | Black holes are conjectured to be the fastest quantum scramblers in nature, with the stretched horizon being the scrambling boundary. Under this assumption, we show that any infalling body must couple to virtually the entire black hole Hilbert space even prior to the Page time in order for there to be any hope of prese... |
1605.03312 | Daniele Malafarina | Daniele Malafarina | Gravitational collapse of Hagedorn fluids | 7 pages, 5 figures | Phys. Rev. D 93, 104042 (2016) | 10.1103/PhysRevD.93.104042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a toy model for relativistic collapse of an homogeneous perfect
fluid that takes into account an equation of state for high density matter, in
the form of an Hagedorn phase, and semiclassical corrections in the strong
field. We show that collapse reaches a critical minimum size and then bounces.
We discus... | [
{
"created": "Wed, 11 May 2016 07:44:07 GMT",
"version": "v1"
}
] | 2016-06-01 | [
[
"Malafarina",
"Daniele",
""
]
] | We consider a toy model for relativistic collapse of an homogeneous perfect fluid that takes into account an equation of state for high density matter, in the form of an Hagedorn phase, and semiclassical corrections in the strong field. We show that collapse reaches a critical minimum size and then bounces. We discuss ... |
2307.06239 | Hussain Gohar | Hussain Gohar, Vincenzo Salzano | A generalized mass-to-horizon relation: a new global approach to
entropic cosmologies and its connection to $\Lambda$CDM | 9 pages, 1 table and added references and explanations | Phys. Rev. D 109, 084075 (2024) | 10.1103/PhysRevD.109.084075 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | In this letter, we propose a new generalized mass-to-horizon relation to be
used in the context of entropic cosmologies and holographic principle
scenarios. We show that a general scaling of the mass with the Universe horizon
as $M=\gamma \frac{c^2}{G}L^n$ leads to a new generalized entropy $S_n = \gamma
\frac{n}{1+n... | [
{
"created": "Wed, 12 Jul 2023 15:28:15 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Mar 2024 15:01:09 GMT",
"version": "v2"
}
] | 2024-05-02 | [
[
"Gohar",
"Hussain",
""
],
[
"Salzano",
"Vincenzo",
""
]
] | In this letter, we propose a new generalized mass-to-horizon relation to be used in the context of entropic cosmologies and holographic principle scenarios. We show that a general scaling of the mass with the Universe horizon as $M=\gamma \frac{c^2}{G}L^n$ leads to a new generalized entropy $S_n = \gamma \frac{n}{1+n}\... |
1707.03654 | Stoytcho Yazadjiev | Stoytcho Yazadjiev | Uniqueness theorem for static wormholes in Einstein-phantom scalar field
theory | 10 pages, LaTeX | Phys. Rev. D 96, 044045 (2017) | 10.1103/PhysRevD.96.044045 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we prove a uniqueness theorem for the regular static,
traversable wormhole solutions to the Einstein-phantom scalar field theory with
two asymptotically flat regions (ends). We show that when a certain condition
on the asymptotic values of the scalar field is imposed such solutions are
uniquely s... | [
{
"created": "Wed, 12 Jul 2017 11:29:22 GMT",
"version": "v1"
}
] | 2017-09-06 | [
[
"Yazadjiev",
"Stoytcho",
""
]
] | In the present paper we prove a uniqueness theorem for the regular static, traversable wormhole solutions to the Einstein-phantom scalar field theory with two asymptotically flat regions (ends). We show that when a certain condition on the asymptotic values of the scalar field is imposed such solutions are uniquely spe... |
1106.2377 | J\"org Hennig | Florian Beyer and J\"org Hennig | Smooth Gowdy symmetric generalized Taub-NUT solutions | 56 pages, 1 figure. The new version contains a detailed explanation
of the Fuchsian method on the 2-sphere | Class. Quantum Grav. 29 (2012) 245017 | 10.1088/0264-9381/29/24/245017 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a class of S3 Gowdy vacuum models with a regular past Cauchy horizon
which we call smooth Gowdy symmetric generalized Taub-NUT solutions. In
particular, we prove existence of such solutions by formulating a singular
initial value problem with asymptotic data on the past Cauchy horizon. The
result of our inve... | [
{
"created": "Mon, 13 Jun 2011 03:10:10 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Jul 2012 22:33:01 GMT",
"version": "v2"
}
] | 2012-12-05 | [
[
"Beyer",
"Florian",
""
],
[
"Hennig",
"Jörg",
""
]
] | We study a class of S3 Gowdy vacuum models with a regular past Cauchy horizon which we call smooth Gowdy symmetric generalized Taub-NUT solutions. In particular, we prove existence of such solutions by formulating a singular initial value problem with asymptotic data on the past Cauchy horizon. The result of our invest... |
1110.3476 | Zhengwen Fu | Z. W. Fu, Y. Zhang and M. L. Tong | Observational constraints on a Yang-Mills condensate dark energy model | 12 pages, 3 figures | Class. Quantum Grav. 28 (2011) 225017 | 10.1088/0264-9381/28/22/225017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the recently released Union2 compilation with 557 Type Ia supernovae,
the shift parameter of cosmic microwave background given by the WMAP7
observations, and the baryon acoustic oscillation measurement from the Sloan
Digital Sky Survey, we perform the $\chi^2$ analysis on the 1-loop Yang-Mills
condensate (YMC) ... | [
{
"created": "Sun, 16 Oct 2011 12:13:16 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Oct 2011 10:30:59 GMT",
"version": "v2"
}
] | 2011-10-26 | [
[
"Fu",
"Z. W.",
""
],
[
"Zhang",
"Y.",
""
],
[
"Tong",
"M. L.",
""
]
] | Using the recently released Union2 compilation with 557 Type Ia supernovae, the shift parameter of cosmic microwave background given by the WMAP7 observations, and the baryon acoustic oscillation measurement from the Sloan Digital Sky Survey, we perform the $\chi^2$ analysis on the 1-loop Yang-Mills condensate (YMC) da... |
1109.1178 | Krzysztof Bolejko | Roberto A. Sussman, Krzysztof Bolejko | A novel approach to the dynamics of Szekeres dust models | 26 pages, 2 figures | Class. Q. Grav. 29 (2012) 065018 | 10.1088/0264-9381/29/6/065018 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain an elegant and useful description of the dynamics of Szekeres dust
models (in their full generality) by means of `quasi-local' scalar variables
constructed by suitable integral distributions that can be interpreted as
weighed proper volume averages of the local covariant scalars. In terms of
these variables... | [
{
"created": "Tue, 6 Sep 2011 13:29:42 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Mar 2012 05:08:09 GMT",
"version": "v2"
}
] | 2015-05-30 | [
[
"Sussman",
"Roberto A.",
""
],
[
"Bolejko",
"Krzysztof",
""
]
] | We obtain an elegant and useful description of the dynamics of Szekeres dust models (in their full generality) by means of `quasi-local' scalar variables constructed by suitable integral distributions that can be interpreted as weighed proper volume averages of the local covariant scalars. In terms of these variables, ... |
1203.1454 | Prabir Rudra | Ujjal Debnath, Prabir Rudra, Ritabrata Biswas | Nature of singularity formed by the gravitational collapse in Husain
space-time with electromagnetic field and scalar field | 9 pages, 19 figures | Astrophysics and Space Science (2012) | 10.1007/s10509-012-0975-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we have investigated the outcome of gravitational collapse in
Husain space-time in the presence of electro-magnetic and a scalar field with
potential. In order to study the nature of the singularity, global behavior of
radial null geodesics have been taken into account. The nature of singularities
forme... | [
{
"created": "Wed, 7 Mar 2012 12:41:28 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Mar 2012 06:49:12 GMT",
"version": "v2"
}
] | 2012-03-12 | [
[
"Debnath",
"Ujjal",
""
],
[
"Rudra",
"Prabir",
""
],
[
"Biswas",
"Ritabrata",
""
]
] | In this work, we have investigated the outcome of gravitational collapse in Husain space-time in the presence of electro-magnetic and a scalar field with potential. In order to study the nature of the singularity, global behavior of radial null geodesics have been taken into account. The nature of singularities formed ... |
1009.1369 | Max Fomitchev | Max I. Fomitchev | Dark Matter and Dark Energy as Effects of Quantum Gravity | 18 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/3.0/ | I present a theory of quantum gravity based on the principle of gravitational
energy fluctuations. Gravitational energy fluctuations -- gravitons -- are
responsible for elastic scattering of subatomic particles. Such scattering
corresponds to complimentary force -- graviton scattering force -- arising in
gravitationa... | [
{
"created": "Tue, 7 Sep 2010 19:07:57 GMT",
"version": "v1"
}
] | 2010-09-08 | [
[
"Fomitchev",
"Max I.",
""
]
] | I present a theory of quantum gravity based on the principle of gravitational energy fluctuations. Gravitational energy fluctuations -- gravitons -- are responsible for elastic scattering of subatomic particles. Such scattering corresponds to complimentary force -- graviton scattering force -- arising in gravitational ... |
1611.08255 | Luis Gustavo Tomaz Silva M. Sc. | Emilio Elizalde and Luis G. T. Silva | Inhomogeneous imperfect fluid inflation | 9 pages, 16 figures, accepted for publication in Ap&SS | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A generalized equation of state corresponding to a model that includes a
Chaplygin gas and a viscous term is investigated, in the context of the
reconstruction program in scalar field cosmology. The corresponding
inflationary model parameters can be conveniently adjusted in order to
reproduce the most recent PLANCK d... | [
{
"created": "Thu, 24 Nov 2016 16:58:48 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Dec 2016 16:56:52 GMT",
"version": "v2"
}
] | 2016-12-19 | [
[
"Elizalde",
"Emilio",
""
],
[
"Silva",
"Luis G. T.",
""
]
] | A generalized equation of state corresponding to a model that includes a Chaplygin gas and a viscous term is investigated, in the context of the reconstruction program in scalar field cosmology. The corresponding inflationary model parameters can be conveniently adjusted in order to reproduce the most recent PLANCK dat... |
1705.06351 | David Anderson | David Anderson, Nicolas Yunes | Solar System Constraints on Scalar-Tensor Gravity with Positive Coupling
Constant upon Cosmological Evolution of the Scalar Field | 20 pages, 9 figures, submitted for review to Physical Review D | Phys. Rev. D 96, 064037 (2017) | 10.1103/PhysRevD.96.064037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar-tensor theories of gravity modify General Relativity by introducing a
scalar field that couples non-minimally to the metric tensor, while satisfying
the weak-equivalence principle. These theories are interesting because they
have the potential to simultaneously suppress modifications to Einstein's
theory on So... | [
{
"created": "Wed, 17 May 2017 21:21:34 GMT",
"version": "v1"
}
] | 2017-09-27 | [
[
"Anderson",
"David",
""
],
[
"Yunes",
"Nicolas",
""
]
] | Scalar-tensor theories of gravity modify General Relativity by introducing a scalar field that couples non-minimally to the metric tensor, while satisfying the weak-equivalence principle. These theories are interesting because they have the potential to simultaneously suppress modifications to Einstein's theory on Sola... |
1905.02787 | Merab Gogberashvili Prof | Revaz Beradze and Merab Gogberashvili | Gravitational Waves from Mirror World | "Physics" version. arXiv admin note: substantial text overlap with
arXiv:1902.05425 | Physics 1 (2019) 67 | 10.3390/physics1010007 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider the properties of the 10 confirmed by the LIGO
Collaboration gravitational wave signals from the black hole mergers. We want
to explain non-observation of electromagnetic counterpart and higher then
expected merging rates of these events, assuming the existence of their sources
in the hidden... | [
{
"created": "Sat, 4 May 2019 06:41:40 GMT",
"version": "v1"
},
{
"created": "Sun, 23 Jun 2019 09:53:22 GMT",
"version": "v2"
}
] | 2019-06-26 | [
[
"Beradze",
"Revaz",
""
],
[
"Gogberashvili",
"Merab",
""
]
] | In this paper we consider the properties of the 10 confirmed by the LIGO Collaboration gravitational wave signals from the black hole mergers. We want to explain non-observation of electromagnetic counterpart and higher then expected merging rates of these events, assuming the existence of their sources in the hidden m... |
1702.00874 | Hajime Sotani | Hajime Sotani, Kostas D. Kokkotas | On the maximum mass limit of neutron stars in scalar-tensor gravity | null | Phys. Rev. D 95, 044032 (2017) | 10.1103/PhysRevD.95.044032 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The maximum mass limits of neutron stars in scalar-tensor gravity is
discussed and compared with the limits set by general relativity. The limit is
parametrized with respect to the combination of the nuclear saturation
parameters and the maximum sound velocity in the core. It is shown that, for
smaller values of the ... | [
{
"created": "Thu, 2 Feb 2017 23:59:00 GMT",
"version": "v1"
}
] | 2017-02-23 | [
[
"Sotani",
"Hajime",
""
],
[
"Kokkotas",
"Kostas D.",
""
]
] | The maximum mass limits of neutron stars in scalar-tensor gravity is discussed and compared with the limits set by general relativity. The limit is parametrized with respect to the combination of the nuclear saturation parameters and the maximum sound velocity in the core. It is shown that, for smaller values of the so... |
gr-qc/0312075 | Yanjing He | A. A. Coley, Y. He, W. C. Lim | Isotropic singularity in inhomogeneous brane cosmological models | 32 pages with 8 pictures. submitted to Class. Quant. Grav | Class.Quant.Grav. 21 (2004) 1311-1342 | 10.1088/0264-9381/21/6/003 | null | gr-qc | null | We discuss the asymptotic dynamical evolution of spatially inhomogeneous
brane-world cosmological models close to the initial singularity. By
introducing suitable scale-invariant dependent variables and a suitable gauge,
we write the evolution equations of the spatially inhomogeneous $G_{2}$ brane
cosmological models... | [
{
"created": "Tue, 16 Dec 2003 20:46:33 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Coley",
"A. A.",
""
],
[
"He",
"Y.",
""
],
[
"Lim",
"W. C.",
""
]
] | We discuss the asymptotic dynamical evolution of spatially inhomogeneous brane-world cosmological models close to the initial singularity. By introducing suitable scale-invariant dependent variables and a suitable gauge, we write the evolution equations of the spatially inhomogeneous $G_{2}$ brane cosmological models w... |
1805.08723 | Giampiero Esposito Dr. | Donato Bini, Giampiero Esposito | On the local isometric embedding of trapped surfaces into
three-dimensional Riemannian manifolds | 21 pages, 3 figures | null | 10.1088/1361-6382/aadb39 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study trapped surfaces from the point of view of local isometric embedding
into three-dimensional Riemannian manifolds. When a two-surface is embedded
into three-dimensional Euclidean space, the problem of finding all surfaces
applicable upon it gives rise to a non-linear partial differential equation of
Monge-Amp... | [
{
"created": "Tue, 22 May 2018 16:28:57 GMT",
"version": "v1"
}
] | 2018-09-26 | [
[
"Bini",
"Donato",
""
],
[
"Esposito",
"Giampiero",
""
]
] | We study trapped surfaces from the point of view of local isometric embedding into three-dimensional Riemannian manifolds. When a two-surface is embedded into three-dimensional Euclidean space, the problem of finding all surfaces applicable upon it gives rise to a non-linear partial differential equation of Monge-Amper... |
1007.3005 | Anil Yadav dr | Anil Kumar Yadav | Dissipative Future Universe without Big Rip | 6 pages, 2 figures, To appear in Int. J. Theor. Phys | Int.J.Theor.Phys.50:1664-1670,2011 | 10.1007/s10773-011-0675-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present study deals with dissipative future universe without big rip in
context of Eckart formalism. The generalized chaplygin gas, characterized by
equation of state $p=-\frac{A}{\rho^\frac{1}{\alpha}}$, has been considered as
a model for dark energy due to its dark-energy-like evolution at late time. It
is demo... | [
{
"created": "Sun, 18 Jul 2010 13:33:44 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Jan 2011 14:55:55 GMT",
"version": "v2"
}
] | 2011-04-06 | [
[
"Yadav",
"Anil Kumar",
""
]
] | The present study deals with dissipative future universe without big rip in context of Eckart formalism. The generalized chaplygin gas, characterized by equation of state $p=-\frac{A}{\rho^\frac{1}{\alpha}}$, has been considered as a model for dark energy due to its dark-energy-like evolution at late time. It is demons... |
2209.13562 | Shafqat Ul Islam | Jitendra Kumar, Shafqat Ul Islam, Sushant G. Ghosh | Loop Quantum Gravity motivated multihorizon rotating black holes | 12 Pages, 9 Figures, 1 Table, Minor typos corrected, Accepted for
publication in JCAP | null | 10.1088/1475-7516/2022/11/032 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | With a semiclassical polymerization in the loop quantum gravity (LQG), the
interior of Schwarzschild black holes provides a captivating single-horizon
regular black hole spacetime. The shortage of rotating black hole models in
loop quantum gravity (LQG) substantially restrains the progress of testing LQG
from observa... | [
{
"created": "Tue, 27 Sep 2022 17:34:48 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Nov 2022 09:38:32 GMT",
"version": "v2"
}
] | 2022-11-23 | [
[
"Kumar",
"Jitendra",
""
],
[
"Islam",
"Shafqat Ul",
""
],
[
"Ghosh",
"Sushant G.",
""
]
] | With a semiclassical polymerization in the loop quantum gravity (LQG), the interior of Schwarzschild black holes provides a captivating single-horizon regular black hole spacetime. The shortage of rotating black hole models in loop quantum gravity (LQG) substantially restrains the progress of testing LQG from observati... |
2106.12560 | Jitendra Kumar Dr. | J. Kumar, H. D. Singh, A. K. Prasad | A generalized buchdahl model for compact stars in f (R;T) gravity | null | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | In this paper, we study the stellar structure in terms of alternative theory
of gravity specially by f (R;T) gravity theory. Here, we consider the function
f (R;T) = R+2VT where R is the Ricci scalar, T is the stress-energy momentum
and V is the coupling constant. Using it we developed a stellar model that
briefly ex... | [
{
"created": "Wed, 23 Jun 2021 17:38:46 GMT",
"version": "v1"
}
] | 2021-06-24 | [
[
"Kumar",
"J.",
""
],
[
"Singh",
"H. D.",
""
],
[
"Prasad",
"A. K.",
""
]
] | In this paper, we study the stellar structure in terms of alternative theory of gravity specially by f (R;T) gravity theory. Here, we consider the function f (R;T) = R+2VT where R is the Ricci scalar, T is the stress-energy momentum and V is the coupling constant. Using it we developed a stellar model that briefly expl... |
1709.04860 | Heba Sami | Heba Sami, Joseph Ntahompagaze, Amare Abebe | Inflationary f(R) cosmologies | 13 pages, 10 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper discusses a simple procedure to reconstruct f (R)-gravity models
from exact cosmological solutions of the Einstein field equations with a
noninteracting classical scalar field-and-radiation background. From the kind
of inflationary scenario we want, we show how the potential functions can be
obtained. We t... | [
{
"created": "Thu, 14 Sep 2017 16:28:14 GMT",
"version": "v1"
}
] | 2017-09-15 | [
[
"Sami",
"Heba",
""
],
[
"Ntahompagaze",
"Joseph",
""
],
[
"Abebe",
"Amare",
""
]
] | This paper discusses a simple procedure to reconstruct f (R)-gravity models from exact cosmological solutions of the Einstein field equations with a noninteracting classical scalar field-and-radiation background. From the kind of inflationary scenario we want, we show how the potential functions can be obtained. We the... |
1309.4633 | Joan Josep Ferrando | Joan Josep Ferrando and Juan Antonio S\'aez | Type D vacuum solutions: a new intrinsic approach | 17 pages | Gen Relativ Gravit (2014) 46: 1073 | 10.1007/s10714-014-1703-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new approach to the intrinsic properties of the type D vacuum
solutions based on the invariant symmetries that these spacetimes admit. By
using tensorial formalism and without explicitly integrating the field
equations, we offer a new proof that the upper bound of covariant derivatives
of the Riemann ten... | [
{
"created": "Wed, 18 Sep 2013 12:58:07 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Mar 2014 08:26:04 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Ferrando",
"Joan Josep",
""
],
[
"Sáez",
"Juan Antonio",
""
]
] | We present a new approach to the intrinsic properties of the type D vacuum solutions based on the invariant symmetries that these spacetimes admit. By using tensorial formalism and without explicitly integrating the field equations, we offer a new proof that the upper bound of covariant derivatives of the Riemann tenso... |
2104.08923 | H\'ector Hern\'andez | Daniel Su\'arez-Urango, J. Ospino, H\'ector Hern\'andez and Luis A.
N\'u\~nez | Acceptability Conditions and Relativistic Anisotropic Generalized
Polytropes | 31 pages, 11 figures | null | 10.1140/epjc/s10052-022-10119-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper explored the physical acceptability conditions for anisotropic
matter configurations in General Relativity. The study considered a generalized
polytropic equation of state $P=\kappa {\rho}^{\gamma}+\alpha \rho -\beta$ for
a heuristic anisotropy. We integrated the corresponding Lane-Emden equation for
sever... | [
{
"created": "Sun, 18 Apr 2021 17:55:24 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Apr 2021 22:03:53 GMT",
"version": "v2"
},
{
"created": "Mon, 3 May 2021 15:35:06 GMT",
"version": "v3"
},
{
"created": "Wed, 12 Jan 2022 17:25:07 GMT",
"version": "v4"
}
] | 2022-03-14 | [
[
"Suárez-Urango",
"Daniel",
""
],
[
"Ospino",
"J.",
""
],
[
"Hernández",
"Héctor",
""
],
[
"Núñez",
"Luis A.",
""
]
] | This paper explored the physical acceptability conditions for anisotropic matter configurations in General Relativity. The study considered a generalized polytropic equation of state $P=\kappa {\rho}^{\gamma}+\alpha \rho -\beta$ for a heuristic anisotropy. We integrated the corresponding Lane-Emden equation for several... |
1501.03629 | Sunil Maharaj | Gabriel Govender, Byron P. Brassel, Sunil D. Maharaj | The effect of a two-fluid atmosphere on relativistic stars | 31 pages, Minor corrections implemented | Eur. Phys. J. C 75, 325 (2015) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We model the physical behaviour at the surface of a relativistic radiating
star in the strong gravity limit. The spacetime in the interior is taken to be
spherically symmetrical and shear-free. The heat conduction in the interior of
the star is governed by the geodesic motion of fluid particles and a
nonvanishing rad... | [
{
"created": "Thu, 15 Jan 2015 11:01:49 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Aug 2015 06:59:41 GMT",
"version": "v2"
}
] | 2015-08-05 | [
[
"Govender",
"Gabriel",
""
],
[
"Brassel",
"Byron P.",
""
],
[
"Maharaj",
"Sunil D.",
""
]
] | We model the physical behaviour at the surface of a relativistic radiating star in the strong gravity limit. The spacetime in the interior is taken to be spherically symmetrical and shear-free. The heat conduction in the interior of the star is governed by the geodesic motion of fluid particles and a nonvanishing radia... |
1704.04307 | James Mertens | John T. Giblin Jr, James B. Mertens, Glenn D. Starkman | A cosmologically motivated reference formulation of numerical relativity | 15 pages, 5 figures, planning to submit to CQG | null | 10.1088/1361-6382/aa8af9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The application of numerical relativity to cosmological spacetimes is
providing new insights into the behavior of Einstein's equations, beyond common
approximations. In order for simulations to be performed as accurately and
efficiently as possible, we investigate a novel formulation of Einstein's
equations. This for... | [
{
"created": "Fri, 14 Apr 2017 00:23:31 GMT",
"version": "v1"
}
] | 2017-10-25 | [
[
"Giblin",
"John T.",
"Jr"
],
[
"Mertens",
"James B.",
""
],
[
"Starkman",
"Glenn D.",
""
]
] | The application of numerical relativity to cosmological spacetimes is providing new insights into the behavior of Einstein's equations, beyond common approximations. In order for simulations to be performed as accurately and efficiently as possible, we investigate a novel formulation of Einstein's equations. This formu... |
1807.08016 | Xisco Jimenez-Forteza | Xisco Jimenez-Forteza, Tiziano Abdelsalhin, Paolo Pani, Leonardo
Gualtieri | Impact of high-order tidal terms on binary neutron-star waveforms | Published version: More optimistic conclusion about detectability due
to higher projected SNR | Phys. Rev. D 98, 124014 (2018) | 10.1103/PhysRevD.98.124014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | GW170817, the milestone gravitational-wave event originated from a binary
neutron star merger, has allowed scientific community to place a constraint on
the equation of state of neutron stars by extracting the leading-order,
tidal-deformability term from the gravitational waveform. Here we incorporate
tidal correctio... | [
{
"created": "Fri, 20 Jul 2018 20:14:23 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Sep 2018 08:33:56 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Dec 2018 17:19:39 GMT",
"version": "v3"
}
] | 2018-12-19 | [
[
"Jimenez-Forteza",
"Xisco",
""
],
[
"Abdelsalhin",
"Tiziano",
""
],
[
"Pani",
"Paolo",
""
],
[
"Gualtieri",
"Leonardo",
""
]
] | GW170817, the milestone gravitational-wave event originated from a binary neutron star merger, has allowed scientific community to place a constraint on the equation of state of neutron stars by extracting the leading-order, tidal-deformability term from the gravitational waveform. Here we incorporate tidal corrections... |
1403.5625 | Yeuk-Kwan Edna Cheung | Changhong Li, Robert H. Brandenberger, Yeuk-Kwan E. Cheung | Big Bounce Genesis | 4 pages; 2 figures; published version | Phys. Rev. D 90, 123535 (2014) | 10.1103/PhysRevD.90.123535 | NITS-PHY-2014004 | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report on the possibility to use dark matter particle's mass and its cross
section as a smoking gun signal of the existence of a Big Bounce at the early
stage in the evolution of our currently observed universe. A model independent
study of dark matter production in the pre-bounce contraction and the
post-bounce e... | [
{
"created": "Sat, 22 Mar 2014 08:32:35 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Apr 2014 07:37:29 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Jan 2016 04:42:21 GMT",
"version": "v3"
}
] | 2016-01-18 | [
[
"Li",
"Changhong",
""
],
[
"Brandenberger",
"Robert H.",
""
],
[
"Cheung",
"Yeuk-Kwan E.",
""
]
] | We report on the possibility to use dark matter particle's mass and its cross section as a smoking gun signal of the existence of a Big Bounce at the early stage in the evolution of our currently observed universe. A model independent study of dark matter production in the pre-bounce contraction and the post-bounce exp... |
2311.18032 | Elena Codazzo | Elena Codazzo, Matteo Di Giovanni, Jan Harms | Gravitational wave signals from long lasting binary-single black hole
encounters | 20 pages, 9 figures | null | 10.1140/epjp/s13360-023-04808-2 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the dense regions of star clusters, close encounters with black holes
(BHs) can occur giving rise to a new class of gravitational-wave (GW) signals.
Binary-single encounters between three BHs are expected to dominate the rate of
signals from unbound systems in the frequency band of terrestrial GW detectors.
The en... | [
{
"created": "Wed, 29 Nov 2023 19:15:10 GMT",
"version": "v1"
}
] | 2024-01-17 | [
[
"Codazzo",
"Elena",
""
],
[
"Di Giovanni",
"Matteo",
""
],
[
"Harms",
"Jan",
""
]
] | In the dense regions of star clusters, close encounters with black holes (BHs) can occur giving rise to a new class of gravitational-wave (GW) signals. Binary-single encounters between three BHs are expected to dominate the rate of signals from unbound systems in the frequency band of terrestrial GW detectors. The enco... |
1703.08599 | Ya-Peng Hu | Ya-Peng Hu, Feng Pan and Xin-Meng Wu | The effects of massive graviton on the equilibrium between the black
hole and radiation gas in an isolated box | 9 pages, 4 figures | Phys.Lett. B772 (2017) 553-558 | 10.1016/j.physletb.2017.07.019 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that the black hole can has temperature and radiate the
particles with black body spectrum, i.e. Hawking radiation. Therefore, if the
black hole is surrounded by an isolated box, there is a thermal equilibrium
between the black hole and radiation gas. A simple case considering the thermal
equilibrium... | [
{
"created": "Fri, 24 Mar 2017 21:12:08 GMT",
"version": "v1"
}
] | 2017-07-26 | [
[
"Hu",
"Ya-Peng",
""
],
[
"Pan",
"Feng",
""
],
[
"Wu",
"Xin-Meng",
""
]
] | It is well known that the black hole can has temperature and radiate the particles with black body spectrum, i.e. Hawking radiation. Therefore, if the black hole is surrounded by an isolated box, there is a thermal equilibrium between the black hole and radiation gas. A simple case considering the thermal equilibrium b... |
2301.05037 | Celio Muniz | Milko Estrada and Celio R. Muniz | Dymnikova-Schwinger traversable wormholes | 18 pages | JCAP 03(2023)055 | 10.1088/1475-7516/2023/03/055 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we obtain new $d$-dimensional and asymptotically flat wormhole
solutions by assuming a specific form of the energy density distribution. This
is addressed by considering the generalization of the so-called Dymnikova
model, originally studied in the context of regular black holes. In this way,
we find c... | [
{
"created": "Thu, 12 Jan 2023 14:06:12 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Mar 2023 17:15:44 GMT",
"version": "v2"
}
] | 2023-03-29 | [
[
"Estrada",
"Milko",
""
],
[
"Muniz",
"Celio R.",
""
]
] | In this paper, we obtain new $d$-dimensional and asymptotically flat wormhole solutions by assuming a specific form of the energy density distribution. This is addressed by considering the generalization of the so-called Dymnikova model, originally studied in the context of regular black holes. In this way, we find con... |
2112.08404 | Isabela Santiago De Matos | Jo\~ao C. Lobato, Isabela S. Matos, Maur\'icio O. Calv\~ao and Ioav
Waga | New dynamical system approach to Palatini $f(R)$ theories and its
application to exponential gravity | 15 pages, 6 figures and 2 tables | null | 10.1103/PhysRevD.104.124083 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The approach of dynamical systems is a useful tool to investigate the
cosmological history that follows from modified theories of gravity. It
provides qualitative information on the typical background solutions in a
parametrized family of models, through the computation of the fixed points and
their characters (attra... | [
{
"created": "Wed, 15 Dec 2021 19:00:29 GMT",
"version": "v1"
}
] | 2022-01-12 | [
[
"Lobato",
"João C.",
""
],
[
"Matos",
"Isabela S.",
""
],
[
"Calvão",
"Maurício O.",
""
],
[
"Waga",
"Ioav",
""
]
] | The approach of dynamical systems is a useful tool to investigate the cosmological history that follows from modified theories of gravity. It provides qualitative information on the typical background solutions in a parametrized family of models, through the computation of the fixed points and their characters (attract... |
1803.05015 | Fabio D'Ambrosio | Fabio D'Ambrosio, Carlo Rovelli | How Information Crosses Schwarzschild's Central Singularity | 11 pages, 8 figures; v2 fixed typos and added one reference | Class.Quant.Grav. 35 (2018) no.21, 215010 | 10.1088/1361-6382/aae499 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the natural extension of spacetime across Schwarzschild's central
singularity and the behavior of the geodesics crossing it. Locality implies
that this extension is independent from the future fate of black holes. We
argue that this extension is the natural $\hbar\!\to\!0$ limit of the effective
quantum geom... | [
{
"created": "Tue, 13 Mar 2018 19:25:17 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Jul 2018 21:18:07 GMT",
"version": "v2"
}
] | 2019-01-17 | [
[
"D'Ambrosio",
"Fabio",
""
],
[
"Rovelli",
"Carlo",
""
]
] | We study the natural extension of spacetime across Schwarzschild's central singularity and the behavior of the geodesics crossing it. Locality implies that this extension is independent from the future fate of black holes. We argue that this extension is the natural $\hbar\!\to\!0$ limit of the effective quantum geomet... |
gr-qc/9805043 | Steven L. Liebling | Steven L. Liebling | Multiply Unstable Black Hole Critical Solutions | 8 pages, 7 figures | Phys.Rev.D58:084015,1998 | 10.1103/PhysRevD.58.084015 | null | gr-qc | null | The gravitational collapse of a complex scalar field in the harmonic map is
modeled in spherical symmetry. Previous work has shown that a change of
stability of the attracting critical solution occurs in parameter space from
the discretely self-similarity critical (DSS) solution originally found by
Choptuik to the co... | [
{
"created": "Tue, 12 May 1998 23:34:35 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Liebling",
"Steven L.",
""
]
] | The gravitational collapse of a complex scalar field in the harmonic map is modeled in spherical symmetry. Previous work has shown that a change of stability of the attracting critical solution occurs in parameter space from the discretely self-similarity critical (DSS) solution originally found by Choptuik to the cont... |
1108.2071 | Quentin G. Bailey | Rhondale Tso, Quentin G. Bailey | Light-bending tests of Lorentz invariance | 9 pages, 7 figures | Phys. Rev. D 84: 085025, 2011 | 10.1103/PhysRevD.84.085025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Classical light bending is investigated for weak gravitational fields in the
presence of hypothetical local Lorentz violation. Using an effective field
theory framework that describes general deviations from local Lorentz
invariance, we derive a modified deflection angle for light passing near a
massive body. The res... | [
{
"created": "Wed, 10 Aug 2011 00:09:58 GMT",
"version": "v1"
}
] | 2013-05-29 | [
[
"Tso",
"Rhondale",
""
],
[
"Bailey",
"Quentin G.",
""
]
] | Classical light bending is investigated for weak gravitational fields in the presence of hypothetical local Lorentz violation. Using an effective field theory framework that describes general deviations from local Lorentz invariance, we derive a modified deflection angle for light passing near a massive body. The resul... |
gr-qc/9805069 | Jerome Martin | Jerome Martin and Dominik J. Schwarz | Reply to `Comment on ``The influence of cosmological transitions on the
evolution of density perturbations'' ' | 2 pages, Revtex | null | null | null | gr-qc astro-ph | null | We reply to L.P. Grishchuk's comment (gr-qc/9801011) on our paper ``The
Influence of Cosmological Transitions on the Evolution of Density
Perturbations'' (Phys. Rev. D 57, 3302, 1998). We show that his points of
criticism are not correct.
| [
{
"created": "Mon, 18 May 1998 16:01:25 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Martin",
"Jerome",
""
],
[
"Schwarz",
"Dominik J.",
""
]
] | We reply to L.P. Grishchuk's comment (gr-qc/9801011) on our paper ``The Influence of Cosmological Transitions on the Evolution of Density Perturbations'' (Phys. Rev. D 57, 3302, 1998). We show that his points of criticism are not correct. |
1610.07300 | Daria Tretyakova | D.A. Tretyakova and T.M. Adyev | Horndeski/Galileon black hole shadows | 12 pages. arXiv admin note: substantial text overlap with
arXiv:1606.08569 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine observational signatures of the asymptotically de Sitter branch of
static spherically symmetric Horndeski/Galileon solutions. Our analysis
reveales that possible deviations of the photon sphere size from those of the
GR Schwarzshild solution are vanishing compared to the resolution of modern
radio-interfer... | [
{
"created": "Mon, 24 Oct 2016 07:07:49 GMT",
"version": "v1"
}
] | 2016-10-25 | [
[
"Tretyakova",
"D. A.",
""
],
[
"Adyev",
"T. M.",
""
]
] | We examine observational signatures of the asymptotically de Sitter branch of static spherically symmetric Horndeski/Galileon solutions. Our analysis reveales that possible deviations of the photon sphere size from those of the GR Schwarzshild solution are vanishing compared to the resolution of modern radio-interferom... |
2107.00939 | Anna Chrysostomou | Chun-Hung Chen, Hing-Tong Cho, Anna Chrysostomou and Alan S. Cornell | Asymptotic quasinormal frequencies of different spin fields in
$d$-dimensional spherically-symmetric black holes | 50 pages, 7 figures, and 6 tables. Updates include minor formatting,
added commentary in the conclusions, and a revision of the extremal
Reissner-Nordstr\"om discussion (section II-C2, results changed in section
IV-B). Figure 8 has been removed and figure 3 has been refined. To appear in
Classical and Quantum G... | Classical and Quantum Gravity 39 (2022) 055001 | 10.1088/1361-6382/ac4955 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While Hod's conjecture is demonstrably restrictive, the link he observed
between black hole (BH) area quantisation and the large overtone ($n$) limit of
quasinormal frequencies (QNFs) motivated intense scrutiny of the regime, from
which an improved understanding of asymptotic quasinormal frequencies (aQNFs)
emerged. ... | [
{
"created": "Fri, 2 Jul 2021 10:01:35 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Feb 2022 19:45:54 GMT",
"version": "v2"
}
] | 2022-02-09 | [
[
"Chen",
"Chun-Hung",
""
],
[
"Cho",
"Hing-Tong",
""
],
[
"Chrysostomou",
"Anna",
""
],
[
"Cornell",
"Alan S.",
""
]
] | While Hod's conjecture is demonstrably restrictive, the link he observed between black hole (BH) area quantisation and the large overtone ($n$) limit of quasinormal frequencies (QNFs) motivated intense scrutiny of the regime, from which an improved understanding of asymptotic quasinormal frequencies (aQNFs) emerged. A ... |
1610.05663 | Elmo Benedetto | Antonio Feoli and Elmo Benedetto | Dark Energy or local acceleration? | null | Gravitation and Cosmology vol. 23 pp. 240 -244 (2017) | 10.1134/S0202289317030045 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find that an observer with a suitable acceleration relative to the frame
comoving whit the cosmic fluid, in the context of the FRW decelerating
universe, measures the same cosmological redshift as the LambdaCDM model. The
estimated value of this acceleration is beta = 1.4x10^-9m/s^2. The problem of a
too high pecu... | [
{
"created": "Mon, 17 Oct 2016 13:31:51 GMT",
"version": "v1"
}
] | 2017-08-29 | [
[
"Feoli",
"Antonio",
""
],
[
"Benedetto",
"Elmo",
""
]
] | We find that an observer with a suitable acceleration relative to the frame comoving whit the cosmic fluid, in the context of the FRW decelerating universe, measures the same cosmological redshift as the LambdaCDM model. The estimated value of this acceleration is beta = 1.4x10^-9m/s^2. The problem of a too high peculi... |
0707.4420 | Graeme Candlish | Graeme N. Candlish and Harvey S. Reall | On the smoothness of static multi-black hole solutions of
higher-dimensional Einstein-Maxwell theory | 19 pages; minor corrections | Class.Quant.Grav.24:6025-6040,2007 | 10.1088/0264-9381/24/23/022 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Previous work has shown that static multi-black hole solutions of
higher-dimensional Einstein-Maxwell theory do not possess smooth horizons. We
show that the lack of smoothness is worse than previously demonstrated. We
consider solutions describing multiple black holes on a common axis. In five
dimensions, the metric... | [
{
"created": "Mon, 30 Jul 2007 14:07:24 GMT",
"version": "v1"
},
{
"created": "Tue, 5 May 2009 13:39:18 GMT",
"version": "v2"
}
] | 2009-05-05 | [
[
"Candlish",
"Graeme N.",
""
],
[
"Reall",
"Harvey S.",
""
]
] | Previous work has shown that static multi-black hole solutions of higher-dimensional Einstein-Maxwell theory do not possess smooth horizons. We show that the lack of smoothness is worse than previously demonstrated. We consider solutions describing multiple black holes on a common axis. In five dimensions, the metric i... |
0712.3907 | Hirotaka Yoshino | Hirotaka Yoshino | Highly distorted apparent horizons and the hoop conjecture | 10 pages, 5 figures, submitted to PRD(R) | Phys.Rev.D77:041501,2008 | 10.1103/PhysRevD.77.041501 | Alberta-Thy-22-07 | gr-qc | null | By analyzing the apparent horizon (AH) formation in the collision of two
pp-waves with rectangular sources in four dimensions, we study to what extent
the AH can be distorted without violating the energy conditions. It is shown
that the highly distorted AH can form in this system although it cannot be
arbitrarily lon... | [
{
"created": "Sun, 23 Dec 2007 11:58:27 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Yoshino",
"Hirotaka",
""
]
] | By analyzing the apparent horizon (AH) formation in the collision of two pp-waves with rectangular sources in four dimensions, we study to what extent the AH can be distorted without violating the energy conditions. It is shown that the highly distorted AH can form in this system although it cannot be arbitrarily long.... |
2206.02488 | Misba Afrin | Sushant G. Ghosh and Misba Afrin | An Upper Limit on the Charge of the Black Hole Sgr A* from EHT
Observations | 12 pages, 8 figures, 1 table. Matched to the published version | Astrophys. J. 944 (2023) 174 | 10.3847/1538-4357/acb695 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | The Event Horizon Telescope (EHT) recently released an image of the
supermassive black hole Sgr A* showing an angular shadow diameter $d_{sh}= 48.7
\pm 7\,\mu$as and Schwarzschild shadow deviation $\delta =
-0.08^{+0.09}_{-0.09}~\text{(VLTI)},-0.04^{+0.09}_{-0.10}~\text{(Keck)}$ using
a black hole mass $M = 4.0^{+1.1... | [
{
"created": "Mon, 6 Jun 2022 10:44:10 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Jan 2023 06:58:34 GMT",
"version": "v2"
},
{
"created": "Sun, 26 Feb 2023 06:33:05 GMT",
"version": "v3"
}
] | 2023-02-28 | [
[
"Ghosh",
"Sushant G.",
""
],
[
"Afrin",
"Misba",
""
]
] | The Event Horizon Telescope (EHT) recently released an image of the supermassive black hole Sgr A* showing an angular shadow diameter $d_{sh}= 48.7 \pm 7\,\mu$as and Schwarzschild shadow deviation $\delta = -0.08^{+0.09}_{-0.09}~\text{(VLTI)},-0.04^{+0.09}_{-0.10}~\text{(Keck)}$ using a black hole mass $M = 4.0^{+1.1}_... |
gr-qc/0209065 | Michael Filchenkov | I.G. Dymnikova (Department of Mathematics and Computer Science,
University of Warmia and Mazury in Olsztyn, Olsztyn, Poland), M.L.
Fil'chenkov (Alexander Friedmann Laboratory for Theoretical Physics, St.
Petersburg, Russia; Institute of Gravitation and Cosmology, Peoples'
Friendship University of Russia, Moscow... | Quantum Birth of a Hot Universe II. Model Parameter Estimates from CMB
Temperature Fluctuations | 6 pages, 1 figure, LaTex, to appear in Phys. Lett. B | null | null | ICG-03-02 | gr-qc | null | We consider the quantum birth of a hot FRW universe from a vacuum-dominated
quantum fluctuation with admixture of radiation and strings, which correspond
to quantum tunnelling from a discrete energy level with a non-zero temperature.
The presence of strings with the equation of state $p=-\epsilon/3$ mimics a
positive... | [
{
"created": "Thu, 19 Sep 2002 14:27:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Dymnikova",
"I. G.",
"",
"Department of Mathematics and Computer Science,\n University of Warmia and Mazury in Olsztyn, Olsztyn, Poland"
],
[
"Fil'chenkov",
"M. L.",
"",
"Alexander Friedmann Laboratory for Theoretical Physics, St.\n Petersburg, Russia; Institute of Gravitati... | We consider the quantum birth of a hot FRW universe from a vacuum-dominated quantum fluctuation with admixture of radiation and strings, which correspond to quantum tunnelling from a discrete energy level with a non-zero temperature. The presence of strings with the equation of state $p=-\epsilon/3$ mimics a positive c... |
1307.4920 | Biswajit Paul | Rabin Banerjee, Pradip Mukherjee, Biswajit Paul | New Hamiltonian analysis of Regge Teitelboim minisuperspace cosmology | 18 pages, Latex, Sec. 4 is substantially modified where WDW equations
discussed, reference added, version to appear in PRD | null | 10.1103/PhysRevD.89.043508 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new Hamiltonian formulation of the minisuperspace cosmology following from
the geodetic brane gravity model introduced by Regge and Teitelboim is
presented. The model is considered in the framework of higher derivative
theories which facilitates Hamiltonian formulation. The analysis is done using
the equivalent fir... | [
{
"created": "Thu, 18 Jul 2013 12:22:55 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jan 2014 07:12:43 GMT",
"version": "v2"
}
] | 2014-03-05 | [
[
"Banerjee",
"Rabin",
""
],
[
"Mukherjee",
"Pradip",
""
],
[
"Paul",
"Biswajit",
""
]
] | A new Hamiltonian formulation of the minisuperspace cosmology following from the geodetic brane gravity model introduced by Regge and Teitelboim is presented. The model is considered in the framework of higher derivative theories which facilitates Hamiltonian formulation. The analysis is done using the equivalent first... |
gr-qc/9705057 | Sukratu Barve | Sukratu Barve and T. P. Singh | Are naked singularites forbidden by the second law of thermodynamics? | 6 pages, Latex file. This essay was selected for honorable mention by
the Gravity Research Foundation | Mod.Phys.Lett. A12 (1997) 2415-2420 | 10.1142/S021773239700251X | null | gr-qc | null | By now, many examples of naked singularities in classical general relativity
are known. It may however be that a physical principle over and above the
general theory prevents the occurrence of such singularities in nature.
Assuming the validity of the Weyl curvature hypothesis, we propose that naked
singularities are... | [
{
"created": "Wed, 21 May 1997 21:47:07 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Barve",
"Sukratu",
""
],
[
"Singh",
"T. P.",
""
]
] | By now, many examples of naked singularities in classical general relativity are known. It may however be that a physical principle over and above the general theory prevents the occurrence of such singularities in nature. Assuming the validity of the Weyl curvature hypothesis, we propose that naked singularities are f... |
gr-qc/0410092 | Roberto Casadio | Roberto Casadio, Fabio Finelli, Mattia Luzzi, Giovanni Venturi | Improved WKB analysis of cosmological perturbations | 13 pages, REVTeX4 style, 5 figures, final version to appear in Phys.
Rev. D | Phys.Rev. D71 (2005) 043517 | 10.1103/PhysRevD.71.043517 | null | gr-qc astro-ph hep-th | null | Improved Wentzel-Kramers-Brillouin (WKB)-type approximations are presented in
order to study cosmological perturbations beyond the lowest order. Our methods
are based on functions which approximate the true perturbation modes over the
complete range of the independent (Langer) variable, from sub-horizon to
super-hori... | [
{
"created": "Tue, 19 Oct 2004 13:05:54 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Feb 2005 09:07:09 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Casadio",
"Roberto",
""
],
[
"Finelli",
"Fabio",
""
],
[
"Luzzi",
"Mattia",
""
],
[
"Venturi",
"Giovanni",
""
]
] | Improved Wentzel-Kramers-Brillouin (WKB)-type approximations are presented in order to study cosmological perturbations beyond the lowest order. Our methods are based on functions which approximate the true perturbation modes over the complete range of the independent (Langer) variable, from sub-horizon to super-horizo... |
gr-qc/0009067 | Masoud Alimohammadi | M. Alimohammadi, A. Shariati | Berry phase for spin--1/2 particles moving in a spacetime with torsion | 9 pages. Some typos corrected, a discussion on propagating torsion is
added, accepted for publication in Eur. Phys. J. C (2001) | Eur.Phys.J.C21:193-196,2001 | 10.1007/s100520100692 | null | gr-qc hep-th | null | Berry phase for a spin--1/2 particle moving in a flat spacetime with torsion
is investigated in the context of the Einstein-Cartan-Dirac model. It is shown
that if the torsion is due to a dense polarized background, then there is a
Berry phase only if the fermion is massless and its momentum is perpendicular
to the d... | [
{
"created": "Tue, 19 Sep 2000 09:31:15 GMT",
"version": "v1"
},
{
"created": "Wed, 9 May 2001 08:41:47 GMT",
"version": "v2"
}
] | 2009-01-07 | [
[
"Alimohammadi",
"M.",
""
],
[
"Shariati",
"A.",
""
]
] | Berry phase for a spin--1/2 particle moving in a flat spacetime with torsion is investigated in the context of the Einstein-Cartan-Dirac model. It is shown that if the torsion is due to a dense polarized background, then there is a Berry phase only if the fermion is massless and its momentum is perpendicular to the dir... |
gr-qc/0207013 | B. V. Ivanov | B.V.Ivanov | Rigidly rotating cylinders of charged dust | 8 pages, RevTex (galley) | Class.Quant.Grav. 19 (2002) 5131 | 10.1088/0264-9381/19/20/307 | null | gr-qc | null | The gravitational field of a rigidly rotating cylinder of charged dust is
found analytically. The general and all regular solutions are divided into
three classes. The acceleration and the vorticity of the dust are given, as
well as the conditions for the appearance of closed timelike curves.
| [
{
"created": "Tue, 2 Jul 2002 07:42:56 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Ivanov",
"B. V.",
""
]
] | The gravitational field of a rigidly rotating cylinder of charged dust is found analytically. The general and all regular solutions are divided into three classes. The acceleration and the vorticity of the dust are given, as well as the conditions for the appearance of closed timelike curves. |
gr-qc/9706005 | Benjamin C. Harms | R. Casadio, B. Harms and Y. Leblanc | Statistical mechanics of Kerr-Newman dilaton black holes and the
bootstrap condition | RevTeX, 5 pages, 2 PS figures included (requires epsf), submitted to
Phys. Rev. Lett | Phys.Rev. D57 (1998) 1309-1312 | 10.1103/PhysRevD.57.1309 | UAHEP977 | gr-qc hep-th | null | The Bekenstein-Hawking ``entropy'' of a Kerr-Newman dilaton black hole is
computed in a perturbative expansion in the charge-to-mass ratio. The most
probable configuration for a gas of such black holes is analyzed in the
microcanonical formalism and it is argued that it does not satisfy the
equipartition principle bu... | [
{
"created": "Mon, 2 Jun 1997 16:07:07 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Casadio",
"R.",
""
],
[
"Harms",
"B.",
""
],
[
"Leblanc",
"Y.",
""
]
] | The Bekenstein-Hawking ``entropy'' of a Kerr-Newman dilaton black hole is computed in a perturbative expansion in the charge-to-mass ratio. The most probable configuration for a gas of such black holes is analyzed in the microcanonical formalism and it is argued that it does not satisfy the equipartition principle but ... |
1812.06171 | Marco de Cesare | Marco de Cesare | Limiting curvature mimetic gravity for group field theory condensates | 27 pages, 2 figures; v2:added references, matches published version
in PRD | Phys. Rev. D 99, 063505 (2019) | 10.1103/PhysRevD.99.063505 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nonsingular bouncing cosmologies are realized in limiting curvature mimetic
gravity by means of a multi-valued potential $f(\Box\phi)$ depending on the
d'Alembertian of a scalar field $\phi$. We determine the functional form of
such a potential so as to exactly reproduce the cosmological background
dynamics obtained ... | [
{
"created": "Fri, 14 Dec 2018 21:25:46 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Apr 2019 16:05:03 GMT",
"version": "v2"
}
] | 2019-04-05 | [
[
"de Cesare",
"Marco",
""
]
] | Nonsingular bouncing cosmologies are realized in limiting curvature mimetic gravity by means of a multi-valued potential $f(\Box\phi)$ depending on the d'Alembertian of a scalar field $\phi$. We determine the functional form of such a potential so as to exactly reproduce the cosmological background dynamics obtained in... |
1903.10159 | Sumanta Chakraborty | Kabir Chakravarti, Sumanta Chakraborty, Khun Sang Phukon, Sukanta Bose
and Soumitra SenGupta | Constraining extra-spatial dimensions with observations of GW170817 | Published Version, 17 pages, 5 figures | Class. Quantum Grav. 37, 105004 (2020) | 10.1088/1361-6382/ab8355 | LIGO-P1900080 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the modifications introduced by extra-spatial dimensions beyond the
four dimensional spacetime on the macroscopic properties of neutron stars,
which in turn affect the gravitational wave spectrum of their binaries. It
turns out that the mass-radius relation of the neutron stars, and their tidal
deformabilit... | [
{
"created": "Mon, 25 Mar 2019 07:26:01 GMT",
"version": "v1"
},
{
"created": "Thu, 16 May 2019 04:42:47 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Apr 2020 04:19:36 GMT",
"version": "v3"
}
] | 2020-04-30 | [
[
"Chakravarti",
"Kabir",
""
],
[
"Chakraborty",
"Sumanta",
""
],
[
"Phukon",
"Khun Sang",
""
],
[
"Bose",
"Sukanta",
""
],
[
"SenGupta",
"Soumitra",
""
]
] | We derive the modifications introduced by extra-spatial dimensions beyond the four dimensional spacetime on the macroscopic properties of neutron stars, which in turn affect the gravitational wave spectrum of their binaries. It turns out that the mass-radius relation of the neutron stars, and their tidal deformability,... |
1804.06652 | Shanquan Lan | Shan-Quan Lan, Gu-Qiang Li, Jie-Xiong Mo, Xiao-Bao Xu | A New Phase Transition Related to the Black Hole's Topological Charge | 11 pages, 5 figures | Advances in High Energy Physics 2019,8270265 | 10.1155/2019/8270265 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The topological charge $\epsilon$ of AdS black hole is introduced in
Ref.[1,2], where a complete thermodynamic first law is obtained. In this paper,
we investigate a new phase transition related to the topological charge in
Einstein-Maxwell theory. Firstly, we derive the explicit solutions
corresponding to the diverg... | [
{
"created": "Wed, 18 Apr 2018 11:17:17 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Feb 2019 07:48:39 GMT",
"version": "v2"
}
] | 2019-02-28 | [
[
"Lan",
"Shan-Quan",
""
],
[
"Li",
"Gu-Qiang",
""
],
[
"Mo",
"Jie-Xiong",
""
],
[
"Xu",
"Xiao-Bao",
""
]
] | The topological charge $\epsilon$ of AdS black hole is introduced in Ref.[1,2], where a complete thermodynamic first law is obtained. In this paper, we investigate a new phase transition related to the topological charge in Einstein-Maxwell theory. Firstly, we derive the explicit solutions corresponding to the divergen... |
0801.4148 | Jose Geraldo Pereira | R. Aldrovandi, J. G. Pereira | Gravitation: in search of the missing torsion | 18 pages. To be published in the special issue on torsion of the
Annales de la Fondation Louis de Broglie, volume editor V. Dvoeglazov | Ann. Fond. Louis de Broglie 32 (2007) 229 | null | null | gr-qc hep-th | null | A linear Lorentz connection has always two fundamental derived
characteristics: curvature and torsion. The latter is assumed to vanish in
general relativity. Three gravitational models involving non-vanishing torsion
are examined: teleparallel gravity, Einstein-Cartan, and new general
relativity. Their dependability ... | [
{
"created": "Sun, 27 Jan 2008 19:39:16 GMT",
"version": "v1"
}
] | 2008-06-13 | [
[
"Aldrovandi",
"R.",
""
],
[
"Pereira",
"J. G.",
""
]
] | A linear Lorentz connection has always two fundamental derived characteristics: curvature and torsion. The latter is assumed to vanish in general relativity. Three gravitational models involving non-vanishing torsion are examined: teleparallel gravity, Einstein-Cartan, and new general relativity. Their dependability is... |
gr-qc/9806024 | David Langlois | Brandon Carter and David Langlois | Relativistic models for Superconducting-Superfluid Mixtures | 28 pages, LaTeX, no figure; to appear in Nuclear Physics B | Nucl.Phys. B531 (1998) 478-504 | 10.1016/S0550-3213(98)00430-1 | null | gr-qc astro-ph cond-mat.supr-con hep-th | null | The material below the crust of a neutron star is understood to be
describable in terms of three principal independently moving constituents,
identifiable as neutrons, protons, and electrons, of which the first two are
believed to form mutually coupled bosonic condensates. The large scale
comportment of such a system... | [
{
"created": "Thu, 4 Jun 1998 14:22:08 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Carter",
"Brandon",
""
],
[
"Langlois",
"David",
""
]
] | The material below the crust of a neutron star is understood to be describable in terms of three principal independently moving constituents, identifiable as neutrons, protons, and electrons, of which the first two are believed to form mutually coupled bosonic condensates. The large scale comportment of such a system w... |
2307.12913 | Nur Jaman | Barnali Das, Nur Jaman and M Sami | Gravitational wave background from quintessential inflation and NANOGrav
data | 12 pages, 4 figures, Figure updated, clarification in introduction,
revised appeared in PRD | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the production process of induced gravity waves due to large
scalar fluctuations in the paradigm of quintessential inflation. We numerically
solve the Mukhanov-Sasaki equation for different sets of parameters to obtain
the power spectra. We demonstrate that the induced gravity wave signal
generated in ... | [
{
"created": "Mon, 24 Jul 2023 16:12:38 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Nov 2023 17:50:57 GMT",
"version": "v2"
}
] | 2023-11-09 | [
[
"Das",
"Barnali",
""
],
[
"Jaman",
"Nur",
""
],
[
"Sami",
"M",
""
]
] | We investigate the production process of induced gravity waves due to large scalar fluctuations in the paradigm of quintessential inflation. We numerically solve the Mukhanov-Sasaki equation for different sets of parameters to obtain the power spectra. We demonstrate that the induced gravity wave signal generated in th... |
1205.4131 | Ettore Minguzzi | E. Minguzzi | Relativistic Chasles' theorem and the conjugacy classes of the
inhomogeneous Lorentz group | Latex2e, 49 pages. v2: few typos corrected | J. Math. Phys. 54 (2013) 022501 | 10.1063/1.4789950 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work is devoted to the relativistic generalization of Chasles' theorem,
namely to the proof that every proper orthochronous isometry of Minkowski
spacetime, which sends some point to its chronological future, is generated
through the frame displacement of an observer which moves with constant
acceleration and co... | [
{
"created": "Fri, 18 May 2012 10:44:39 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Feb 2013 14:48:09 GMT",
"version": "v2"
}
] | 2013-06-21 | [
[
"Minguzzi",
"E.",
""
]
] | This work is devoted to the relativistic generalization of Chasles' theorem, namely to the proof that every proper orthochronous isometry of Minkowski spacetime, which sends some point to its chronological future, is generated through the frame displacement of an observer which moves with constant acceleration and cons... |
gr-qc/0002013 | Richard Price | Alcides Garat and Richard H. Price | Nonexistence of conformally flat slices of the Kerr spacetime | 5 LaTeX pages; no figures; to be submitted to Phys. Rev. D | Phys.Rev. D61 (2000) 124011 | 10.1103/PhysRevD.61.124011 | null | gr-qc | null | Initial data for black hole collisions are commonly generated using the
Bowen-York approach based on conformally flat 3-geometries. The standard
(constant Boyer-Lindquist time) spatial slices of the Kerr spacetime are not
conformally flat, so that use of the Bowen-York approach is limited in dealing
with rotating hol... | [
{
"created": "Wed, 2 Feb 2000 21:16:22 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Garat",
"Alcides",
""
],
[
"Price",
"Richard H.",
""
]
] | Initial data for black hole collisions are commonly generated using the Bowen-York approach based on conformally flat 3-geometries. The standard (constant Boyer-Lindquist time) spatial slices of the Kerr spacetime are not conformally flat, so that use of the Bowen-York approach is limited in dealing with rotating holes... |
0706.4286 | Jason Grigsby | Jason D. Grigsby and Gregory B. Cook | Measuring eccentricity in binary black-hole initial data | 12 pages, 11 figures, submitted to Physical Review D, revtex4 | Phys.Rev.D77:044011,2008 | 10.1103/PhysRevD.77.044011 | null | gr-qc | null | Initial data for evolving black-hole binaries can be constructed via many
techniques, and can represent a wide range of physical scenarios. However,
because of the way that different schemes parameterize the physical aspects of
a configuration, it is not alway clear what a given set of initial data
actually represent... | [
{
"created": "Thu, 28 Jun 2007 17:59:07 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Grigsby",
"Jason D.",
""
],
[
"Cook",
"Gregory B.",
""
]
] | Initial data for evolving black-hole binaries can be constructed via many techniques, and can represent a wide range of physical scenarios. However, because of the way that different schemes parameterize the physical aspects of a configuration, it is not alway clear what a given set of initial data actually represents.... |
1201.4099 | Maria E. Gabach Clement | Mar\'ia E. Gabach Clement | Bounds on the force between black holes | 13 pages, no figures | null | 10.1088/0264-9381/29/16/165008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We treat the problem of N interacting, axisymmetric black holes and obtain
two relations among physical parameters of the system including the force
between the black holes. The first relation involves the total mass, the
angular momenta, the distances and the forces between the black holes. The
second one relates th... | [
{
"created": "Thu, 19 Jan 2012 16:31:41 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Clement",
"María E. Gabach",
""
]
] | We treat the problem of N interacting, axisymmetric black holes and obtain two relations among physical parameters of the system including the force between the black holes. The first relation involves the total mass, the angular momenta, the distances and the forces between the black holes. The second one relates the ... |
2301.09330 | Vladimir S. Manko | C. J. Ram\'irez-Valdez, H. Garc\'ia-Compe\'an, V. S. Manko | Dyonic black holes: The theory of two electromagnetic potentials | 11 pages, no figures | null | 10.1103/PhysRevD.107.064016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we argue that the dyonic black hole spacetimes must be
studied within the theory of two electromagnetic potentials, and we use the
dyonic Reissner-Nordstr\"om solution to demonstrate that the field of the
monopole magnetic charge is correctly described by the $t$-component of the
dual electromagn... | [
{
"created": "Mon, 23 Jan 2023 09:14:11 GMT",
"version": "v1"
}
] | 2023-03-29 | [
[
"Ramírez-Valdez",
"C. J.",
""
],
[
"García-Compeán",
"H.",
""
],
[
"Manko",
"V. S.",
""
]
] | In the present paper we argue that the dyonic black hole spacetimes must be studied within the theory of two electromagnetic potentials, and we use the dyonic Reissner-Nordstr\"om solution to demonstrate that the field of the monopole magnetic charge is correctly described by the $t$-component of the dual electromagnet... |
gr-qc/0503081 | Jason Steffen | J. H. Steffen (University of Washington) | Exploring Fifth Force Interactions with 18th Century Technology | Submission to 2004 GRF Essay Contest | Int.J.Mod.Phys. D13 (2004) 2249-2254 | 10.1142/S0218271804006280 | null | gr-qc | null | Many theories which unify gravity with the other known forces of nature
predict the existence of an intermediate-range ``fifth force'' similar to
gravity. Such a force could be manifest as a deviation from the gravitational
inverse-square law. Currently, at distances near $10^{-1}$m, the inverse-square
law is known t... | [
{
"created": "Fri, 18 Mar 2005 22:04:00 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Steffen",
"J. H.",
"",
"University of Washington"
]
] | Many theories which unify gravity with the other known forces of nature predict the existence of an intermediate-range ``fifth force'' similar to gravity. Such a force could be manifest as a deviation from the gravitational inverse-square law. Currently, at distances near $10^{-1}$m, the inverse-square law is known to ... |
2010.16351 | Sepideh Bakhoda | Sepideh Bakhoda and Thomas Thiemann | Reduced Phase Space Approach to the $U(1)^3$ model for Euclidean Quantum
Gravity | 33 pages | Class. Quantum Grav. 38 (2021) 215006 | 10.1088/1361-6382/ac2721 | null | gr-qc hep-lat hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | If one replaces the constraints of the Ashtekar-Barbero $SU(2)$ gauge theory
formulation of Euclidean gravity by their $U(1)^3$ version, one arrives at a
consistent model which captures significant structure of its $SU(2)$ version.
In particular, it displays a non trivial realisation of the hypersurface
deformation a... | [
{
"created": "Fri, 30 Oct 2020 16:16:14 GMT",
"version": "v1"
},
{
"created": "Sun, 19 Dec 2021 15:07:51 GMT",
"version": "v2"
}
] | 2021-12-21 | [
[
"Bakhoda",
"Sepideh",
""
],
[
"Thiemann",
"Thomas",
""
]
] | If one replaces the constraints of the Ashtekar-Barbero $SU(2)$ gauge theory formulation of Euclidean gravity by their $U(1)^3$ version, one arrives at a consistent model which captures significant structure of its $SU(2)$ version. In particular, it displays a non trivial realisation of the hypersurface deformation alg... |
1002.2601 | Kamal Nandi | Amrita Bhattacharya, Guzel M. Garipova, Ettore Laserra, Arunava Bhadra
and Kamal K. Nandi | The Vacuole Model: New Terms in the Second Order Deflection of Light | 15 pages | JCAP 1102:028,2011 | 10.1088/1475-7516/2011/02/028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present paper is an extension of a recent work (Bhattacharya et al. 2010)
to the Einstein-Strauss vacuole model with a cosmological constant, where we
work out the light deflection by considering perturbations up to order M^3 and
confirm the light bending obtained previously in their vacuole model by Ishak
et al.... | [
{
"created": "Fri, 12 Feb 2010 17:16:30 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Jul 2010 18:24:15 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Mar 2011 06:22:31 GMT",
"version": "v3"
}
] | 2011-03-18 | [
[
"Bhattacharya",
"Amrita",
""
],
[
"Garipova",
"Guzel M.",
""
],
[
"Laserra",
"Ettore",
""
],
[
"Bhadra",
"Arunava",
""
],
[
"Nandi",
"Kamal K.",
""
]
] | The present paper is an extension of a recent work (Bhattacharya et al. 2010) to the Einstein-Strauss vacuole model with a cosmological constant, where we work out the light deflection by considering perturbations up to order M^3 and confirm the light bending obtained previously in their vacuole model by Ishak et al. (... |
1401.1959 | Yungui Gong | Yungui Gong | The general property of dynamical quintessence field | 11 figures, corrected some typos and presentation improved, PLB in
press | Phys. Lett. B 731 (2014) 342-349 | 10.1016/j.physletb.2014.03.013 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the general dynamical behaviors of quintessence field, in
particular, the general conditions for tracking and thawing solutions are
discussed. We explain what the tracking solutions mean and in what sense the
results depend on the initial conditions. Based on the definition of tracking
solution, we give a ... | [
{
"created": "Thu, 9 Jan 2014 11:13:33 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Mar 2014 13:58:32 GMT",
"version": "v2"
}
] | 2014-03-26 | [
[
"Gong",
"Yungui",
""
]
] | We discuss the general dynamical behaviors of quintessence field, in particular, the general conditions for tracking and thawing solutions are discussed. We explain what the tracking solutions mean and in what sense the results depend on the initial conditions. Based on the definition of tracking solution, we give a si... |
2005.03381 | Joao Magueijo | Joao Magueijo | Equivalence of the Chern-Simons state and the Hartle-Hawking and
Vilenkin wave-functions | Version correcting some typos in the Phys.Rev.D published version | Phys. Rev. D 102, 044034 (2020) | 10.1103/PhysRevD.102.044034 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the Chern-Simons (CS) state when reduced to mini-superspace is
the Fourier dual of the Hartle-Hawking (HH) and Vilenkin (V) wave-functions of
the Universe. This is to be expected, given that the former and latter solve
the same constraint equation, written in terms of conjugate variables (loosely
the exp... | [
{
"created": "Thu, 7 May 2020 11:14:18 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Aug 2020 16:31:43 GMT",
"version": "v2"
},
{
"created": "Fri, 22 Jan 2021 18:53:35 GMT",
"version": "v3"
}
] | 2021-01-25 | [
[
"Magueijo",
"Joao",
""
]
] | We show that the Chern-Simons (CS) state when reduced to mini-superspace is the Fourier dual of the Hartle-Hawking (HH) and Vilenkin (V) wave-functions of the Universe. This is to be expected, given that the former and latter solve the same constraint equation, written in terms of conjugate variables (loosely the expan... |
1806.01786 | Ahmad Mohamadnejad | Ahmad Mohamadnejad | Cosmological evolution of the proton-to-electron mass ratio in an
extended Brans-Dicke theory | 11 pages, 1 Figure, version accepted for publication in Modern
Physics Letters A | Mod.Phys.Lett. A34 (2019) no.34, 1950277 | 10.1142/S0217732319502778 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study variation of the proton-to-electron mass ratio $ \mu=m_{p}/m_{e} $
by incorporating standard model (SM) of particle physics into an extended
Brans-Dicke theory. We show that the evolution of the Higgs vacuum expectation
value (VEV), with expansion of the Universe, leads to the variation of the
proton-to-elec... | [
{
"created": "Tue, 5 Jun 2018 16:22:13 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Oct 2018 11:21:19 GMT",
"version": "v2"
},
{
"created": "Sat, 9 Feb 2019 06:22:36 GMT",
"version": "v3"
},
{
"created": "Sat, 12 Oct 2019 05:30:34 GMT",
"version": "v4"
}
] | 2019-11-13 | [
[
"Mohamadnejad",
"Ahmad",
""
]
] | We study variation of the proton-to-electron mass ratio $ \mu=m_{p}/m_{e} $ by incorporating standard model (SM) of particle physics into an extended Brans-Dicke theory. We show that the evolution of the Higgs vacuum expectation value (VEV), with expansion of the Universe, leads to the variation of the proton-to-electr... |
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