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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1708.08969 | Behrouz Mirza | Zahra Mirzaiyan, Behrouz Mirza, Elham Sharifian | Generating five-dimensional Myers-Perry black hole solution using
quaternions | 6 pages | Annals of Physics 389 (2018) 11-18 | 10.1016/j.aop.2017.12.005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Newman-Janis and Giampieri algorithms are two simple methods to generate
stationary rotating black hole solutions in four dimensions. In this paper, we
obtain the Mayers-Perry black hole from the Schwartzchild solution in five
dimensions using quaternions. Our method generates the Mayers-Perry black hole
solution... | [
{
"created": "Sat, 26 Aug 2017 09:25:08 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jan 2018 09:19:13 GMT",
"version": "v2"
}
] | 2018-01-11 | [
[
"Mirzaiyan",
"Zahra",
""
],
[
"Mirza",
"Behrouz",
""
],
[
"Sharifian",
"Elham",
""
]
] | The Newman-Janis and Giampieri algorithms are two simple methods to generate stationary rotating black hole solutions in four dimensions. In this paper, we obtain the Mayers-Perry black hole from the Schwartzchild solution in five dimensions using quaternions. Our method generates the Mayers-Perry black hole solution w... |
0808.2623 | Natalia Kiriushcheva | N. Kiriushcheva, S.V. Kuzmin, C. Racknor, S.R. Valluri | Diffeomorphism Invariance in the Hamiltonian formulation of General
Relativity | 13 pages | Phys.Lett.A372:5101-5105,2008 | 10.1016/j.physleta.2008.05.081 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that when the Einstein-Hilbert Lagrangian is considered without
any non-covariant modifications or change of variables, its Hamiltonian
formulation leads to results consistent with principles of General Relativity.
The first-class constraints of such a Hamiltonian formulation, with the metric
tensor taken... | [
{
"created": "Tue, 19 Aug 2008 15:33:21 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Kiriushcheva",
"N.",
""
],
[
"Kuzmin",
"S. V.",
""
],
[
"Racknor",
"C.",
""
],
[
"Valluri",
"S. R.",
""
]
] | It is shown that when the Einstein-Hilbert Lagrangian is considered without any non-covariant modifications or change of variables, its Hamiltonian formulation leads to results consistent with principles of General Relativity. The first-class constraints of such a Hamiltonian formulation, with the metric tensor taken a... |
gr-qc/9910104 | Martin Bojowald | Martin Bojowald | Loop Quantum Cosmology II: Volume Operators | 21 pages | Class.Quant.Grav.17:1509-1526,2000 | 10.1088/0264-9381/17/6/313 | PITHA 99/33 | gr-qc hep-th | null | Volume operators measuring the total volume of space in a loop quantum theory
of cosmological models are constructed. In the case of models with rotational
symmetry an investigation of the Higgs constraint imposed on the reduced
connection variables is necessary, a complete solution of which is given for
isotropic mo... | [
{
"created": "Thu, 28 Oct 1999 16:07:09 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Bojowald",
"Martin",
""
]
] | Volume operators measuring the total volume of space in a loop quantum theory of cosmological models are constructed. In the case of models with rotational symmetry an investigation of the Higgs constraint imposed on the reduced connection variables is necessary, a complete solution of which is given for isotropic mode... |
gr-qc/0506052 | Maurice H. P. M. van Putten | Maurice H.P.M. van Putten (MIT-LIGO) | Global spectral representations of black hole spacetimes in the complex
plane | Based on an invited talk at the Int'l Conf. Theor. Physics, 11-16
April 2005, Lebedev Physical Institute, Moscow | null | 10.1073/pnas.0508406103 | null | gr-qc hep-th | null | Binary black hole coalescence produces a finite burst of gravitational
radiation which propagates towards quiescent infinity. These spacetimes are
analytic about infinity and contain a dimensionless coupling constant $M/s$,
where $M$ denotes the total mass-energy and $s$ an imaginary distance. This
introduces globall... | [
{
"created": "Thu, 9 Jun 2005 01:14:29 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"van Putten",
"Maurice H. P. M.",
"",
"MIT-LIGO"
]
] | Binary black hole coalescence produces a finite burst of gravitational radiation which propagates towards quiescent infinity. These spacetimes are analytic about infinity and contain a dimensionless coupling constant $M/s$, where $M$ denotes the total mass-energy and $s$ an imaginary distance. This introduces globally ... |
gr-qc/0009029 | Romualdo Tresguerres | Antonio Pulido, Alfredo Tiemblo, Romualdo Tresguerres | Time evolution in the presence of gravity | PlainTeX file, 22 pgs., no figures | Gen.Rel.Grav.33:1495-1517,2001 | 10.1023/A:1012288826450 | null | gr-qc | null | We present a suggestion on the interpretation of canonical time evolution
when gravitation is present, based on the nonlinear gauge approach to gravity.
Essentially, our proposal consists of an internal-time concept, with the time
variable taken from the dynamical fields characteristic of the nonlinear
realization of... | [
{
"created": "Mon, 11 Sep 2000 10:45:46 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Pulido",
"Antonio",
""
],
[
"Tiemblo",
"Alfredo",
""
],
[
"Tresguerres",
"Romualdo",
""
]
] | We present a suggestion on the interpretation of canonical time evolution when gravitation is present, based on the nonlinear gauge approach to gravity. Essentially, our proposal consists of an internal-time concept, with the time variable taken from the dynamical fields characteristic of the nonlinear realization of t... |
1609.03982 | Giacomo Rosati | Giovanni Amelino-Camelia, Leonardo Barcaroli, Giacomo D'Amico,
Niccol\'o Loret, Giacomo Rosati | Quantum-gravity-induced dual lensing and IceCube neutrinos | In this version V2 we give a definition of variation probability
which could be considered in alternative to the notion of variation
probability already introduced in version V1; both notions of variation
probability are contemplated in the data analysis. arXiv admin note: text
overlap with arXiv:1605.00496 | Int.J.Mod.Phys. D26 (2017) 1750076 | 10.1142/S0218271817500766 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Momentum-space curvature, which is expected in some approaches to the
quantum-gravity problem, can produce dual redshift, a feature which introduces
energy dependence of the travel times of ultrarelativistic particles, and dual
lensing, a feature which mainly affects the direction of observation of
particles. In our ... | [
{
"created": "Tue, 13 Sep 2016 19:04:58 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Sep 2016 00:00:14 GMT",
"version": "v2"
}
] | 2017-06-01 | [
[
"Amelino-Camelia",
"Giovanni",
""
],
[
"Barcaroli",
"Leonardo",
""
],
[
"D'Amico",
"Giacomo",
""
],
[
"Loret",
"Niccoló",
""
],
[
"Rosati",
"Giacomo",
""
]
] | Momentum-space curvature, which is expected in some approaches to the quantum-gravity problem, can produce dual redshift, a feature which introduces energy dependence of the travel times of ultrarelativistic particles, and dual lensing, a feature which mainly affects the direction of observation of particles. In our re... |
1206.4720 | Matt Visser | Valentina Baccetti (Victoria University of Wellington), Prado
Martin-Moruno (Victoria University of Wellington), and Matt Visser (Victoria
University of Wellington) | Gordon and Kerr-Schild ansatze in massive and bimetric gravity | 22 pages | JHEP 1208 (2012) 108 | 10.1007/JHEP08(2012)108 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop the "generalized Gordon ansatz" for the ghost-free versions of
both massive and bimetric gravity, an ansatz which is general enough to include
almost all spacetimes commonly considered to be physically interesting, and
restricted enough to greatly simplify calculations. The ansatz allows explicit
calculati... | [
{
"created": "Wed, 20 Jun 2012 21:00:21 GMT",
"version": "v1"
}
] | 2012-12-06 | [
[
"Baccetti",
"Valentina",
"",
"Victoria University of Wellington"
],
[
"Martin-Moruno",
"Prado",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria\n University of Wellington"
]
] | We develop the "generalized Gordon ansatz" for the ghost-free versions of both massive and bimetric gravity, an ansatz which is general enough to include almost all spacetimes commonly considered to be physically interesting, and restricted enough to greatly simplify calculations. The ansatz allows explicit calculation... |
2010.04745 | Zack Carson | Zack Carson | Probing Fundamental Physics with Gravitational Waves | Ph.D. Thesis | University of Virginia, 2020 | 10.18130/v3-pxdw-2144 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The explosive coalescence of two black holes 1.3 billion light years away has
for the very first time allowed us to peer into the extreme gravity region of
spacetime surrounding these events. With these maximally compact objects
reaching speeds up to 60% the speed of light, collision events such as these
create harsh... | [
{
"created": "Fri, 9 Oct 2020 18:03:53 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Apr 2021 08:19:59 GMT",
"version": "v2"
}
] | 2021-04-27 | [
[
"Carson",
"Zack",
""
]
] | The explosive coalescence of two black holes 1.3 billion light years away has for the very first time allowed us to peer into the extreme gravity region of spacetime surrounding these events. With these maximally compact objects reaching speeds up to 60% the speed of light, collision events such as these create harsh s... |
1812.08642 | Tapobrata Sarkar | Pritam Banerjee, Suvankar Paul, Rajibul Shaikh, Tapobrata Sarkar | Tidal effects away from the equatorial plane in Kerr backgrounds | Discussions improved. Some figures are slightly modified | null | 10.1016/j.physletb.2019.05.048 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study tidal effects on self-gravitating Newtonian stars rotating around a
Kerr black hole in stable circular orbits away from the equatorial plane. Such
cases are exemplified by a non-vanishing Carter's constant. Here, we calculate
the tidal disruption limit (Roche limit) of the star numerically, in Fermi
normal c... | [
{
"created": "Thu, 20 Dec 2018 15:40:58 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Dec 2018 15:06:04 GMT",
"version": "v2"
},
{
"created": "Sat, 19 Jan 2019 07:06:53 GMT",
"version": "v3"
}
] | 2019-06-26 | [
[
"Banerjee",
"Pritam",
""
],
[
"Paul",
"Suvankar",
""
],
[
"Shaikh",
"Rajibul",
""
],
[
"Sarkar",
"Tapobrata",
""
]
] | We study tidal effects on self-gravitating Newtonian stars rotating around a Kerr black hole in stable circular orbits away from the equatorial plane. Such cases are exemplified by a non-vanishing Carter's constant. Here, we calculate the tidal disruption limit (Roche limit) of the star numerically, in Fermi normal coo... |
1803.03615 | Nils A. Nilsson | Nils A. Nilsson and Ewa Czuchry | Ho\v{r}ava-Lifshitz cosmology in light of new data | Added comments and clarifications as per the referee's suggestions.
Accepted for publication in Physics of the Dark Universe | Physics of the Dark Universe 23C (2019) 100253 | 10.1016/j.dark.2018.100253 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present new observational constraints on Lorentz violating
Ho\v{r}ava-Lifshitz cosmological scenarios using an updated cosmological data
set from Cosmic Microwave Background (Planck CMB), expansion rates of
elliptical and lenticular galaxies, JLA compilation (Joint Light-Curve
Analysis) data for Type Ia supernovae... | [
{
"created": "Fri, 9 Mar 2018 17:43:25 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Apr 2018 10:11:46 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Dec 2018 09:12:29 GMT",
"version": "v3"
}
] | 2018-12-31 | [
[
"Nilsson",
"Nils A.",
""
],
[
"Czuchry",
"Ewa",
""
]
] | We present new observational constraints on Lorentz violating Ho\v{r}ava-Lifshitz cosmological scenarios using an updated cosmological data set from Cosmic Microwave Background (Planck CMB), expansion rates of elliptical and lenticular galaxies, JLA compilation (Joint Light-Curve Analysis) data for Type Ia supernovae (... |
gr-qc/0606051 | Davide Batic | D. Batic | Scattering for massive Dirac fields on the Kerr metric | 33 pages, 1 figure, new proof of Lemma III.1, minor changes in
Section III, a few typos corrected in Thm. IV.1 and Thm. B.3 | J.Math.Phys.48:022502,2007 | 10.1063/1.2456345 | null | gr-qc | null | Starting with the Dirac equation outside the event horizon of a non-extreme
Kerr black hole, we develop a time-dependent scattering theory for massive
Dirac particles. The explicit computation of the modified wave operators at
infinity is done by implementing a time-dependent logarithmic phase shift from
the free dyn... | [
{
"created": "Mon, 12 Jun 2006 11:50:02 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jul 2006 07:43:54 GMT",
"version": "v2"
},
{
"created": "Wed, 20 Sep 2006 09:05:01 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Batic",
"D.",
""
]
] | Starting with the Dirac equation outside the event horizon of a non-extreme Kerr black hole, we develop a time-dependent scattering theory for massive Dirac particles. The explicit computation of the modified wave operators at infinity is done by implementing a time-dependent logarithmic phase shift from the free dynam... |
2004.00086 | Maciej Dunajski | Peter Cameron, Maciej Dunajski | On Schwarzschild causality in higher dimensions | 34 pages, lots of figures. Final version, to appear in Classical and
Quantum Gravity | null | 10.1088/1361-6382/abb4b8 | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the causal properties of asymptotically flat spacetimes depend
on their dimensionality: while the time-like future of any point in the past
conformal infinity $\mathcal{I}^-$ contains the whole of the future conformal
infinity $\mathcal{I}^+$ in $(2+1)$ and $(3+1)$ dimensional Schwarzschild
spacetimes, t... | [
{
"created": "Tue, 31 Mar 2020 20:09:53 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Sep 2020 09:02:47 GMT",
"version": "v2"
}
] | 2020-12-02 | [
[
"Cameron",
"Peter",
""
],
[
"Dunajski",
"Maciej",
""
]
] | We show that the causal properties of asymptotically flat spacetimes depend on their dimensionality: while the time-like future of any point in the past conformal infinity $\mathcal{I}^-$ contains the whole of the future conformal infinity $\mathcal{I}^+$ in $(2+1)$ and $(3+1)$ dimensional Schwarzschild spacetimes, thi... |
gr-qc/9902011 | Jorge Pullin | Jorge Pullin | Matters of Gravity, the newsletter of the APS Topical Group on
Gravitation | 18 pages, LaTeX with html.sty. Jorge Pullin (editor). PDF and html
versions (with figures) in http://vishnu.nirvana.phys.psu.edu/mog.html | null | null | MOG-13 | gr-qc | null | Contents:
Editorial
Correspondents
News:
- Topical Group News, by Jim Isenberg
- We hear that..., by Jorge Pullin
- The Chandra Satellite, by Beverly Berger
Research Briefs:
- Analytical event horizons of merging black holes, by Simonetta Frittelli
- LIGO project update, by David Shoemaker
- Bicen... | [
{
"created": "Wed, 3 Feb 1999 04:30:22 GMT",
"version": "v1"
}
] | 2009-03-10 | [
[
"Pullin",
"Jorge",
""
]
] | Contents: Editorial Correspondents News: - Topical Group News, by Jim Isenberg - We hear that..., by Jorge Pullin - The Chandra Satellite, by Beverly Berger Research Briefs: - Analytical event horizons of merging black holes, by Simonetta Frittelli - LIGO project update, by David Shoemaker - Bicentenary of the Cavendis... |
2103.16431 | Conrad Hewitt | C. G. Hewitt | Dynamical Equilibrium States of a Class of Irrotational Non-Orthogonally
Transitive $G_{2}$ Cosmologies I: The Conjecture of Chaotic Cosmological
Inhomogeneity | Only change is added reference to companion paper
arxiv.org:2103.16428 | null | 10.1088/1361-6382/ac0e46 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein field equations for a class of irrotational non-orthogonally
transitive $G_{2}$ cosmologies are written down as a system of partial
differential equations. The equilibrium points are self-similar and can be
written as a one-parameter, five-dimensional, ordinary differential equation.
The corresponding co... | [
{
"created": "Tue, 30 Mar 2021 15:25:19 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Mar 2021 01:54:27 GMT",
"version": "v2"
}
] | 2021-09-01 | [
[
"Hewitt",
"C. G.",
""
]
] | The Einstein field equations for a class of irrotational non-orthogonally transitive $G_{2}$ cosmologies are written down as a system of partial differential equations. The equilibrium points are self-similar and can be written as a one-parameter, five-dimensional, ordinary differential equation. The corresponding cosm... |
1901.09760 | Dongjin Chway | Dongjin Chway | Light Bending in Models with a Generic Scalar Field | 17 pages, no figure; v2: minor changes; more references are added in
the introduction | null | null | CTPU-PTC-19-02 | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the deflection and time delay of light by the Sun in general scalar
extensions of the Standard Model which may violate the equivalence principle.
Despite the presence of the interaction $\phi FF$ or $\phi F \tilde{F}$ between
the scalar field and photon, we show that the bending and time delay of light
are t... | [
{
"created": "Mon, 28 Jan 2019 16:05:49 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Feb 2019 14:06:09 GMT",
"version": "v2"
}
] | 2019-02-14 | [
[
"Chway",
"Dongjin",
""
]
] | We study the deflection and time delay of light by the Sun in general scalar extensions of the Standard Model which may violate the equivalence principle. Despite the presence of the interaction $\phi FF$ or $\phi F \tilde{F}$ between the scalar field and photon, we show that the bending and time delay of light are the... |
2103.10649 | Hideki Asada | Keita Takizawa, Hideki Asada | Iterative solutions for the gravitational lens equation in the strong
deflection limit | 9 pages, 6 figures, correcting a numerical value and a sentence in
the introduction section, PRD in press | Phys. Rev. D 103, 104039 (2021) | 10.1103/PhysRevD.103.104039 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | Two exact lens equations have been recently shown to be equivalent to each
other, being consistent with the gravitational deflection angle of light from a
source to an observer, both of which can be within a finite distance from a
lens object [Phys. Rev. D 102, 064060 (2020)]. We examine methods for iterative
solutio... | [
{
"created": "Fri, 19 Mar 2021 06:09:57 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Apr 2021 07:47:59 GMT",
"version": "v2"
},
{
"created": "Wed, 12 May 2021 00:45:09 GMT",
"version": "v3"
}
] | 2021-05-26 | [
[
"Takizawa",
"Keita",
""
],
[
"Asada",
"Hideki",
""
]
] | Two exact lens equations have been recently shown to be equivalent to each other, being consistent with the gravitational deflection angle of light from a source to an observer, both of which can be within a finite distance from a lens object [Phys. Rev. D 102, 064060 (2020)]. We examine methods for iterative solutions... |
1905.01742 | Roberto Giamb\`o | Roberto Giamb\`o, John Miritzis, Annagiulia Pezzola | Late time evolution of negatively curved FLRW models | accepted version for publication | Eur. Phys. J. Plus (2020) 135:367 | 10.1140/epjp/s13360-020-00370-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the late time evolution of negatively curved
Friedmann--Le\-ma\^{\i}tre--Robert\-son--Walker (FLRW) models with a perfect
fluid matter source and a scalar field nonminimally coupled to matter. Since,
under mild assumptions on the potential $V$, it is already known that
equilibria corresponding to non-negativ... | [
{
"created": "Sun, 5 May 2019 20:11:39 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Sep 2019 16:12:32 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Apr 2020 10:09:35 GMT",
"version": "v3"
}
] | 2020-04-24 | [
[
"Giambò",
"Roberto",
""
],
[
"Miritzis",
"John",
""
],
[
"Pezzola",
"Annagiulia",
""
]
] | We study the late time evolution of negatively curved Friedmann--Le\-ma\^{\i}tre--Robert\-son--Walker (FLRW) models with a perfect fluid matter source and a scalar field nonminimally coupled to matter. Since, under mild assumptions on the potential $V$, it is already known that equilibria corresponding to non-negative ... |
2105.15184 | Marco Antonelli | Lorenzo Gavassino and Marco Antonelli | Unified Extended Irreversible Thermodynamics and the stability of
relativistic theories for dissipation | 30 pages, 3 figures. This review article is part of the special issue
"Neutron Star Physics in the Multi-Messenger Discourse" for Frontiers
Astronomy and Space Science, see
https://www.frontiersin.org/articles/10.3389/fspas.2021.686344/abstract | Front. Astron. Space Sci. 8:686344 (2021) | 10.3389/fspas.2021.686344 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a relativistic context, the main purpose of Extended Irreversible
Thermodynamics (EIT) is to generalize the principles of non-equilibrium
thermodynamics to the domain of fluid dynamics. In particular, the theory aims
at modelling any diffusion-type process (like heat as diffusion of energy,
viscosity as diffusion ... | [
{
"created": "Mon, 31 May 2021 17:46:29 GMT",
"version": "v1"
}
] | 2021-06-01 | [
[
"Gavassino",
"Lorenzo",
""
],
[
"Antonelli",
"Marco",
""
]
] | In a relativistic context, the main purpose of Extended Irreversible Thermodynamics (EIT) is to generalize the principles of non-equilibrium thermodynamics to the domain of fluid dynamics. In particular, the theory aims at modelling any diffusion-type process (like heat as diffusion of energy, viscosity as diffusion of... |
2210.01372 | Ayan Banerjee | Takol Tangphati, Ayan Banerjee, Sudan Hansraj and Anirudh Pradhan | The criteria of the anisotropic quark star models in Rastall gravity | 9 pages, 5 figures | null | 10.1016/j.aop.2023.169285 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quark stars are terrestrial laboratories to study fundamental physics at
ultrahigh densities and temperatures. In this work, we investigate the internal
structure and the physical properties of quark stars (QSs) in the Rastall
gravity. Rastall gravity is considered a non-conservative theory of gravity,
which is an ef... | [
{
"created": "Tue, 4 Oct 2022 04:28:47 GMT",
"version": "v1"
}
] | 2023-04-26 | [
[
"Tangphati",
"Takol",
""
],
[
"Banerjee",
"Ayan",
""
],
[
"Hansraj",
"Sudan",
""
],
[
"Pradhan",
"Anirudh",
""
]
] | Quark stars are terrestrial laboratories to study fundamental physics at ultrahigh densities and temperatures. In this work, we investigate the internal structure and the physical properties of quark stars (QSs) in the Rastall gravity. Rastall gravity is considered a non-conservative theory of gravity, which is an effe... |
gr-qc/0309091 | Vladimir S. Manko | V.S. Manko, E. Ruiz | On the discrepancy between two approaches to the equilibrium problem for
spinning particles | 9 pages; to appear in Gravitation & Cosmology | Grav.Cosmol. 9 (2003) 183-185 | null | null | gr-qc | null | We show that the absence of equilibrium states of two uncharged spinning
particles located on the symmetry axis, revealed in an approximate approach
recently employed by Bonnor, can be explained by a non-general character of his
approximation scheme which lacks an important arbitrary parameter representing
a strut. T... | [
{
"created": "Fri, 19 Sep 2003 00:25:51 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Manko",
"V. S.",
""
],
[
"Ruiz",
"E.",
""
]
] | We show that the absence of equilibrium states of two uncharged spinning particles located on the symmetry axis, revealed in an approximate approach recently employed by Bonnor, can be explained by a non-general character of his approximation scheme which lacks an important arbitrary parameter representing a strut. The... |
1911.13199 | Enrique Gaztanaga | Enrique Gaztanaga | Homogeneity and the causal boundary | 10 pages, 2 figures, invited review at XXXIX Polish Astronomical
Society Meeting. arXiv admin note: text overlap with arXiv:1904.08218 | Contribution to the Proceedings of the XXXIX Polish Astronomical
(09-12 September 2019, Olsztyn, Poland) | null | null | gr-qc astro-ph.CO hep-th physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Universe with finite age also has a finite causal scale $\chi_\S$, so the
metric can not be homogeneous for $\chi>\chi_\S$, as it is usually assumed. To
account for this, we propose a new causal boundary condition, that can be
fulfil by fixing the cosmological constant $\Lambda$ (a free parameter for
gravity). The ... | [
{
"created": "Tue, 26 Nov 2019 15:33:54 GMT",
"version": "v1"
}
] | 2019-12-03 | [
[
"Gaztanaga",
"Enrique",
""
]
] | A Universe with finite age also has a finite causal scale $\chi_\S$, so the metric can not be homogeneous for $\chi>\chi_\S$, as it is usually assumed. To account for this, we propose a new causal boundary condition, that can be fulfil by fixing the cosmological constant $\Lambda$ (a free parameter for gravity). The re... |
1803.05312 | Sankhasubhra Nag | Nandan Roy, Shivani Singh, Sankhasubhra Nag, and Tapas K. Das | Second Order Perturbative Effects on the Acoustic Geometry | Latex 2e, 9 pages | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we have studied the effect of higher order perturbations,
particularly the second order in details, on the sonic horizon. We have
considered two different schemes of perturbations which are velocity potential
perturbation and mass acceleration rate perturbation. These two schemes give us
qualitatively s... | [
{
"created": "Mon, 12 Mar 2018 18:49:22 GMT",
"version": "v1"
}
] | 2018-03-15 | [
[
"Roy",
"Nandan",
""
],
[
"Singh",
"Shivani",
""
],
[
"Nag",
"Sankhasubhra",
""
],
[
"Das",
"Tapas K.",
""
]
] | In this work, we have studied the effect of higher order perturbations, particularly the second order in details, on the sonic horizon. We have considered two different schemes of perturbations which are velocity potential perturbation and mass acceleration rate perturbation. These two schemes give us qualitatively sim... |
gr-qc/0205039 | Luca Lusanna | Luca Lusanna (INFN, Firenze) | Spacetime, General Covariance, Dirac-Bergmann Observables and
Non-Inertial Frames | 23 pages | null | 10.1142/9789812791368_0005 | null | gr-qc astro-ph hep-th | null | Talk at the 25th Johns Hopkins Workshop "2001: A Relativistic Spacetime
Odyssey", Firenze September 2001.
| [
{
"created": "Fri, 10 May 2002 08:30:28 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Lusanna",
"Luca",
"",
"INFN, Firenze"
]
] | Talk at the 25th Johns Hopkins Workshop "2001: A Relativistic Spacetime Odyssey", Firenze September 2001. |
gr-qc/0006032 | Paolo Matteucci | Marco Godina, Paolo Matteucci and James A. Vickers | Metric-affine gravity and the Nester-Witten 2-form | LaTeX (14 pages, 3 runs); added references, corrected typos,
clarified content of section 3 | J.Geom.Phys. 39 (2001) 265-275 | 10.1016/S0393-0440(01)00007-9 | null | gr-qc | null | In this paper we redefine the well-known metric-affine Hilbert Lagrangian in
terms of a spin-connection and a spin-tetrad. On applying the Poincar\'e-Cartan
method and using the geometry of gauge-natural bundles, a global gravitational
superpotential is derived. On specializing to the case of the Kosmann lift, we
rec... | [
{
"created": "Fri, 9 Jun 2000 14:03:26 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Sep 2001 14:14:24 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Godina",
"Marco",
""
],
[
"Matteucci",
"Paolo",
""
],
[
"Vickers",
"James A.",
""
]
] | In this paper we redefine the well-known metric-affine Hilbert Lagrangian in terms of a spin-connection and a spin-tetrad. On applying the Poincar\'e-Cartan method and using the geometry of gauge-natural bundles, a global gravitational superpotential is derived. On specializing to the case of the Kosmann lift, we recov... |
1506.05597 | Xiangdong Zhang | Xiangdong Zhang | Higher dimensional Loop Quantum Cosmology | 14 pages. Minor revision and references added, presentation improved | Eur. Phys. J. C (2016) 76: 395 | 10.1140/epjc/s10052-016-4249-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Loop quantum cosmology(LQC) is the symmetric model of loop quantum gravity.
In this paper, we generalize the structure of loop quantum cosmology to the
theories with arbitrary spacetime dimensions. The isotropic and homogenous
cosmological model in n+1 dimensions is quantized by the loop quantization
method. Interest... | [
{
"created": "Thu, 18 Jun 2015 09:27:59 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Jun 2015 15:49:12 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Sep 2015 20:01:25 GMT",
"version": "v3"
},
{
"created": "Tue, 6 Oct 2015 13:52:48 GMT",
"version": "v4"
}
] | 2016-10-13 | [
[
"Zhang",
"Xiangdong",
""
]
] | Loop quantum cosmology(LQC) is the symmetric model of loop quantum gravity. In this paper, we generalize the structure of loop quantum cosmology to the theories with arbitrary spacetime dimensions. The isotropic and homogenous cosmological model in n+1 dimensions is quantized by the loop quantization method. Interestin... |
gr-qc/0006095 | Michele Vallisneri | Massimo Pauri and Michele Vallisneri | Marzke-Wheeler coordinates for accelerated observers in special
relativity | AmsLaTeX, 22 pages, 8 eps figures; revised, references added. To
appear in Foundations of Physics Letters, October 2000 | Found.Phys.Lett. 13 (2000) 401-425 | null | null | gr-qc hep-th | null | In special relativity, the definition of coordinate systems adapted to
generic accelerated observers is a long-standing problem, which has found
unequivocal solutions only for the simplest motions. We show that the
Marzke-Wheeler construction, an extension of the Einstein synchronization
convention, produces accelera... | [
{
"created": "Wed, 28 Jun 2000 07:53:07 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Sep 2000 07:49:47 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Pauri",
"Massimo",
""
],
[
"Vallisneri",
"Michele",
""
]
] | In special relativity, the definition of coordinate systems adapted to generic accelerated observers is a long-standing problem, which has found unequivocal solutions only for the simplest motions. We show that the Marzke-Wheeler construction, an extension of the Einstein synchronization convention, produces accelerate... |
1403.7702 | David Garrison | David Garrison | Gauge Field Turbulence as a Cause of Inflation in Chern-Simons Modified
Gravity | 7 pages, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the dynamics of the Chern-Simons Inflation Model
proposed by Alexander, Marciano and Spergel. According to this model, inflation
begins when a fermion current interacts with a turbulent gauge field in a space
larger than some critical size. This mechanism appears to work by driving
energy from... | [
{
"created": "Sun, 30 Mar 2014 04:38:41 GMT",
"version": "v1"
}
] | 2014-04-01 | [
[
"Garrison",
"David",
""
]
] | In this paper, we study the dynamics of the Chern-Simons Inflation Model proposed by Alexander, Marciano and Spergel. According to this model, inflation begins when a fermion current interacts with a turbulent gauge field in a space larger than some critical size. This mechanism appears to work by driving energy from t... |
0911.2190 | Mattias Marklund | G. Brodin, M. Forsberg, M. Marklund, D. Eriksson | Interaction between gravitational waves and plasma waves in the Vlasov
description | 9 pages, uses jpp.cls | null | 10.1017/S0022377809990535 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The nonlinear interaction between electromagnetic, electrostatic and
gravitational waves in a Vlasov plasma is reconsidered. By using a orthonormal
tetrad description the three-wave coupling coefficients are computed. Comparing
with previous results, it is found that the present theory leads to algebraic
expression t... | [
{
"created": "Wed, 11 Nov 2009 17:41:09 GMT",
"version": "v1"
}
] | 2015-05-14 | [
[
"Brodin",
"G.",
""
],
[
"Forsberg",
"M.",
""
],
[
"Marklund",
"M.",
""
],
[
"Eriksson",
"D.",
""
]
] | The nonlinear interaction between electromagnetic, electrostatic and gravitational waves in a Vlasov plasma is reconsidered. By using a orthonormal tetrad description the three-wave coupling coefficients are computed. Comparing with previous results, it is found that the present theory leads to algebraic expression tha... |
2207.10612 | Chandrasekhar Bhamidipati | Pavan Kumar Yerra and Chandrasekhar Bhamidipati | Topology of Born-Infeld AdS black holes in 4D novel
Einstein-Gauss-Bonnet gravity | v1: 14 pages, 5 figures; v2: 17 pages, 7 figures, minor changes,
matches published version | Phys.Lett.B 835 (2022) 137591 | 10.1016/j.physletb.2022.137591 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The topological classification of critical points of black holes in 4D
Einstein-Gauss-Bonnet gravity coupled to Born-Infeld theory is investigated.
Considered independently, Born-infeld corrections to the Einstein action alter
the topological charge of critical points of the charged AdS black hole system,
whereas the... | [
{
"created": "Thu, 21 Jul 2022 17:10:23 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Dec 2022 15:41:03 GMT",
"version": "v2"
}
] | 2022-12-16 | [
[
"Yerra",
"Pavan Kumar",
""
],
[
"Bhamidipati",
"Chandrasekhar",
""
]
] | The topological classification of critical points of black holes in 4D Einstein-Gauss-Bonnet gravity coupled to Born-Infeld theory is investigated. Considered independently, Born-infeld corrections to the Einstein action alter the topological charge of critical points of the charged AdS black hole system, whereas the G... |
2407.17578 | Hector O. Silva | Hector O. Silva | Neutron stars as extreme gravity probes | 46 pages, 8 figures. Review Chapter for the book "Recent Progress on
Gravity Tests" (Eds. C. Bambi and A. C\'ardenas-Avenda\~no, Springer
Singapore) | null | 10.1007/978-981-97-2871-8_4 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Neutron stars are powerful probes into the extremes of physics. In this
chapter, we will discuss how observations of neutron stars, either in isolation
or in binaries, can be leveraged to test general relativity and constrain
competing theories of gravity.
| [
{
"created": "Wed, 24 Jul 2024 18:31:45 GMT",
"version": "v1"
}
] | 2024-07-26 | [
[
"Silva",
"Hector O.",
""
]
] | Neutron stars are powerful probes into the extremes of physics. In this chapter, we will discuss how observations of neutron stars, either in isolation or in binaries, can be leveraged to test general relativity and constrain competing theories of gravity. |
1410.6211 | Shivaraj Kandhasamy | The LIGO Scientific Collaboration, the Virgo Collaboration: J. Aasi,
J. Abadie, B. P. Abbott, R. Abbott, T. Abbott, M. R. Abernathy, T. Accadia,
F. Acernese, C. Adams, T. Adams, P. Addesso, R. X. Adhikari, C. Affeldt, M.
Agathos, N. Aggarwal, O. D. Aguiar, P. Ajith, B. Allen, A. Allocca, E. Amado.
Ceron, D. Ama... | Searching for stochastic gravitational waves using data from the two
co-located LIGO Hanford detectors | 21 pages, 10 figures, 5 tables | Phys. Rev. D 91, 022003 (2015) | 10.1103/PhysRevD.91.022003 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Searches for a stochastic gravitational-wave background (SGWB) using
terrestrial detectors typically involve cross-correlating data from pairs of
detectors. The sensitivity of such cross-correlation analyses depends, among
other things, on the separation between the two detectors: the smaller the
separation, the bett... | [
{
"created": "Wed, 22 Oct 2014 23:34:59 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Nov 2014 06:49:33 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Dec 2014 00:01:40 GMT",
"version": "v3"
}
] | 2015-01-14 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Aasi",
"J.",
""
],
[
"Abadie",
"J.",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T.",
""
... | Searches for a stochastic gravitational-wave background (SGWB) using terrestrial detectors typically involve cross-correlating data from pairs of detectors. The sensitivity of such cross-correlation analyses depends, among other things, on the separation between the two detectors: the smaller the separation, the better... |
0710.3680 | Piotr T. Chru\'sciel | Piotr T. Chrusciel | Mass and angular-momentum inequalities for axi-symmetric initial data
sets I. Positivity of mass | 33 pages in A4 | AnnalsPhys.323:2566-2590,2008 | 10.1016/j.aop.2007.12.010 | null | gr-qc | null | We extend the validity of Brill's axisymmetric positive energy theorem to all
asymptotically flat initial data sets with positive scalar curvature on simply
connected manifolds.
| [
{
"created": "Fri, 19 Oct 2007 11:50:41 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Chrusciel",
"Piotr T.",
""
]
] | We extend the validity of Brill's axisymmetric positive energy theorem to all asymptotically flat initial data sets with positive scalar curvature on simply connected manifolds. |
2011.08770 | Nikos Chatzifotis | Nikos Chatzifotis, George Koutsoumbas, Eleftherios Papantonopoulos | Formation of Bound States of scalar fields in AdS-asymptotic Wormholes | 22 pages, 10 figures, References updated, Minor changes | Phys. Rev. D 104, 024039 (2021) | 10.1103/PhysRevD.104.024039 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the Wentzel-Kramers-Brillouin (WKB) approximation to study the
formation and propagation of bound states in the vicinity of a wormhole in the
non-minimal derivative coupling theory of gravity. The wormhole throat connects
two Anti-de Sitter spacetimes. We show that when the scalar field lies in high
orbital st... | [
{
"created": "Tue, 17 Nov 2020 16:56:57 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Nov 2020 19:47:31 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Dec 2020 11:33:41 GMT",
"version": "v3"
},
{
"created": "Thu, 13 May 2021 10:07:08 GMT",
"version": "v4"
}
] | 2021-08-06 | [
[
"Chatzifotis",
"Nikos",
""
],
[
"Koutsoumbas",
"George",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
]
] | We use the Wentzel-Kramers-Brillouin (WKB) approximation to study the formation and propagation of bound states in the vicinity of a wormhole in the non-minimal derivative coupling theory of gravity. The wormhole throat connects two Anti-de Sitter spacetimes. We show that when the scalar field lies in high orbital stat... |
gr-qc/0301036 | Jean-Philippe Uzan | Nathalie Deruelle (GReCO, IAP, Paris) | Linearized gravity on branes: from Newton's law to cosmological
perturbations | 11 pages, Tex, proceedings of the talk presented at the conference
ERE 2002 held in Menorca in september 2002 | null | null | null | gr-qc astro-ph hep-th | null | We review here how Newton's law can be approximately recovered in the simple,
"paradigmatic", case of a flat $Z_2$-symmetric brane in a 5-D anti-de Sitter
bulk. We then comment on the difficulties encountered so far in extending this
analysis to cosmological perturbations on a Robertson-Walker brane.
| [
{
"created": "Fri, 10 Jan 2003 12:19:30 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Deruelle",
"Nathalie",
"",
"GReCO, IAP, Paris"
]
] | We review here how Newton's law can be approximately recovered in the simple, "paradigmatic", case of a flat $Z_2$-symmetric brane in a 5-D anti-de Sitter bulk. We then comment on the difficulties encountered so far in extending this analysis to cosmological perturbations on a Robertson-Walker brane. |
0708.1460 | Herrera Ramon Dr | Sergio del Campo and Ramon Herrera | Warm inflation in the DGP brane-world model | 15 pages and 1 figure. Accepted for publication in Phys. Lett. B | Phys.Lett.B653:122-128,2007 | 10.1016/j.physletb.2007.08.007 | null | gr-qc astro-ph hep-th | null | Warm inflationary universe models on a warped Dvali-Gabadadze-Porrati brane
are studied. General conditions required for these models to be realizable are
derived and discussed. By using an effective exponential potential we develop
models for constant and variable dissipation coefficient ratio
$r=\frac{\Gamma}{3 H}$... | [
{
"created": "Fri, 10 Aug 2007 15:21:22 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"del Campo",
"Sergio",
""
],
[
"Herrera",
"Ramon",
""
]
] | Warm inflationary universe models on a warped Dvali-Gabadadze-Porrati brane are studied. General conditions required for these models to be realizable are derived and discussed. By using an effective exponential potential we develop models for constant and variable dissipation coefficient ratio $r=\frac{\Gamma}{3 H}$. ... |
1003.1379 | Manuel Hohmann | Manuel Hohmann and Mattias N. R. Wohlfarth | Repulsive gravity model for dark energy | 16 pages, 2 figures; journal version | Phys.Rev.D81:104006,2010 | 10.1103/PhysRevD.81.104006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a multimetric gravity theory containing N >= 3 copies of
standard model matter and a corresponding number of metrics. In the Newtonian
limit, this theory generates attractive gravitational forces within each matter
sector, and repulsive forces of the same strength between matter from different
sectors. T... | [
{
"created": "Sat, 6 Mar 2010 12:34:34 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Jul 2010 07:31:34 GMT",
"version": "v2"
}
] | 2010-07-07 | [
[
"Hohmann",
"Manuel",
""
],
[
"Wohlfarth",
"Mattias N. R.",
""
]
] | We construct a multimetric gravity theory containing N >= 3 copies of standard model matter and a corresponding number of metrics. In the Newtonian limit, this theory generates attractive gravitational forces within each matter sector, and repulsive forces of the same strength between matter from different sectors. Thi... |
1908.00802 | Oliver Buchmueller | Yousef Abou El-Neaj, Cristiano Alpigiani, Sana Amairi-Pyka, Henrique
Araujo, Antun Balaz, Angelo Bassi, Lars Bathe-Peters, Baptiste Battelier,
Aleksandar Belic, Elliot Bentine, Jose Bernabeu, Andrea Bertoldi, Robert
Bingham, Diego Blas, Vasiliki Bolpasi, Kai Bongs, Sougato Bose, Philippe
Bouyer, Themis Bowcock,... | AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in
Space | V2 -- added support authors | EPJ Quantum Technol. 7, 6 (2020) | 10.1140/epjqt/s40507-020-0080-0 | KCL-PH-TH/2019-65, CERN-TH-2019-126 | gr-qc astro-ph.IM hep-ex hep-ph physics.atom-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose in this White Paper a concept for a space experiment using cold
atoms to search for ultra-light dark matter, and to detect gravitational waves
in the frequency range between the most sensitive ranges of LISA and the
terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary
experiment, called ... | [
{
"created": "Fri, 2 Aug 2019 11:02:03 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Oct 2019 10:19:46 GMT",
"version": "v2"
}
] | 2020-07-22 | [
[
"El-Neaj",
"Yousef Abou",
""
],
[
"Alpigiani",
"Cristiano",
""
],
[
"Amairi-Pyka",
"Sana",
""
],
[
"Araujo",
"Henrique",
""
],
[
"Balaz",
"Antun",
""
],
[
"Bassi",
"Angelo",
""
],
[
"Bathe-Peters",
"Lars",
... | We propose in this White Paper a concept for a space experiment using cold atoms to search for ultra-light dark matter, and to detect gravitational waves in the frequency range between the most sensitive ranges of LISA and the terrestrial LIGO/Virgo/KAGRA/INDIGO experiments. This interdisciplinary experiment, called At... |
gr-qc/0302027 | Yuri N. Obukhov | Yuri N. Obukhov, Thoralf Chrobok, and Mike Scherfner | Rotation in string cosmology | 15 pages, 1 figure, Revtex, to appear in Class. Quantum Grav | Class.Quant.Grav.20:1103-1114,2003 | 10.1088/0264-9381/20/6/305 | null | gr-qc astro-ph hep-th | null | We describe exact cosmological solutions with rotation and expansion in the
low-energy effective string theory. These models are spatially homogeneous
(closed Bianchi type IX) and they belong to the family of shear-free metrics
which are causal (no closed timelike curves are allowed), admit no parallax
effects and do... | [
{
"created": "Sun, 9 Feb 2003 12:15:24 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Obukhov",
"Yuri N.",
""
],
[
"Chrobok",
"Thoralf",
""
],
[
"Scherfner",
"Mike",
""
]
] | We describe exact cosmological solutions with rotation and expansion in the low-energy effective string theory. These models are spatially homogeneous (closed Bianchi type IX) and they belong to the family of shear-free metrics which are causal (no closed timelike curves are allowed), admit no parallax effects and do n... |
0902.2360 | Kirill Bronnikov | Kirill A. Bronnikov, Jos\'e P. S. Lemos | Cylindrical wormholes | 13 pages, no figures. Substantial changes, a no-go theorem and 2
references added | Phys.Rev.D79:104019,2009 | 10.1103/PhysRevD.79.104019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the existence of static, cylindrically symmetric wormholes
does not require violation of the weak or null energy conditions near the
throat, and cylindrically symmetric wormhole geometries can appear with less
exotic sources than wormholes whose throats have a spherical topology. Examples
of exact wo... | [
{
"created": "Fri, 13 Feb 2009 17:53:23 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Feb 2009 05:55:27 GMT",
"version": "v2"
},
{
"created": "Tue, 24 Feb 2009 22:30:44 GMT",
"version": "v3"
}
] | 2009-07-30 | [
[
"Bronnikov",
"Kirill A.",
""
],
[
"Lemos",
"José P. S.",
""
]
] | It is shown that the existence of static, cylindrically symmetric wormholes does not require violation of the weak or null energy conditions near the throat, and cylindrically symmetric wormhole geometries can appear with less exotic sources than wormholes whose throats have a spherical topology. Examples of exact worm... |
gr-qc/0303112 | Frank Potter | Howard G. Preston and Franklin Potter | Exploring Large-scale Gravitational Quantization without h-bar in
Planetary Systems, Galaxies, and the Universe | 16 pages | null | null | null | gr-qc | null | We explore a theory of large-scale gravitational quantization, using the
general relativistic Hamilton-Jacobi equation to create quantization conditions
via a new scalar wave equation dependent upon the total mass and the total
vector angular momentum only. Instead of h-bar, a local invariant quantity
proportional to... | [
{
"created": "Fri, 28 Mar 2003 17:29:29 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Preston",
"Howard G.",
""
],
[
"Potter",
"Franklin",
""
]
] | We explore a theory of large-scale gravitational quantization, using the general relativistic Hamilton-Jacobi equation to create quantization conditions via a new scalar wave equation dependent upon the total mass and the total vector angular momentum only. Instead of h-bar, a local invariant quantity proportional to t... |
2401.16259 | David Kubiznak | Tomas Hale, David Kubiznak, Jana Men\v{s}\'ikov\'a | Optical properties of black holes in regularized Maxwell theory | 21 pages, 22 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Regularized Maxwell electrodynamics is a recently discovered theory of
non-linear electrodynamics, with a "minimally regularized" field strength of a
point charge, that is "very close" to the Maxwell theory in many aspects. In
this paper we investigate some of the optical properties of its black holes.
Namely, we stu... | [
{
"created": "Mon, 29 Jan 2024 16:09:45 GMT",
"version": "v1"
}
] | 2024-01-30 | [
[
"Hale",
"Tomas",
""
],
[
"Kubiznak",
"David",
""
],
[
"Menšíková",
"Jana",
""
]
] | Regularized Maxwell electrodynamics is a recently discovered theory of non-linear electrodynamics, with a "minimally regularized" field strength of a point charge, that is "very close" to the Maxwell theory in many aspects. In this paper we investigate some of the optical properties of its black holes. Namely, we study... |
gr-qc/0402100 | Euro Spallucci | E.I.Guendelman, E. Spallucci | Conformally Invariant Brane-universe and the Cosmological Constant | 2 pages; Revtex; contribution to the Proceedings of the 10th Marcel
Grossman Meeting | null | 10.1142/9789812704030_0134 | null | gr-qc hep-th | null | A relativistic 3-brane can be given a conformally invariant, gauge-type,
formulation provided the embedding space is six-dimensional. The implementation
of conformal invariance requires the use of a modified measure, independent of
the metric in the action. A brane-world scenario without the need of a
cosmological co... | [
{
"created": "Tue, 24 Feb 2004 12:12:21 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Guendelman",
"E. I.",
""
],
[
"Spallucci",
"E.",
""
]
] | A relativistic 3-brane can be given a conformally invariant, gauge-type, formulation provided the embedding space is six-dimensional. The implementation of conformal invariance requires the use of a modified measure, independent of the metric in the action. A brane-world scenario without the need of a cosmological cons... |
0906.4767 | Martin Bojowald | Martin Bojowald, Juan D. Reyes, Rakesh Tibrewala | Non-marginal LTB-like models with inverse triad corrections from loop
quantum gravity | 35 pages, 1 figure | Phys.Rev.D80:084002,2009 | 10.1103/PhysRevD.80.084002 | IGC-09/6-4 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Marginal LTB models with corrections from loop quantum gravity have recently
been studied with an emphasis on potential singularity resolution. This paper
corroborates and extends the analysis in two regards: (i) the whole class of
LTB models, including non-marginal ones, is considered, and (ii) an alternative
proced... | [
{
"created": "Thu, 25 Jun 2009 18:30:46 GMT",
"version": "v1"
}
] | 2009-11-06 | [
[
"Bojowald",
"Martin",
""
],
[
"Reyes",
"Juan D.",
""
],
[
"Tibrewala",
"Rakesh",
""
]
] | Marginal LTB models with corrections from loop quantum gravity have recently been studied with an emphasis on potential singularity resolution. This paper corroborates and extends the analysis in two regards: (i) the whole class of LTB models, including non-marginal ones, is considered, and (ii) an alternative procedur... |
gr-qc/0605056 | Juan A. Valiente-Kroon | JA Valiente Kroon | On smoothness-asymmetric null infinities | 13 pages, 1 figure | Class.Quant.Grav. 23 (2006) 3593-3606 | 10.1088/0264-9381/23/10/022 | null | gr-qc | null | We discuss the existence of asymptotically Euclidean initial data sets to the
vacuum Einstein field equations which would give rise (modulo an existence
result for the evolution equations near spatial infinity) to developments with
a past and a future null infinity of different smoothness. For simplicity, the
analysi... | [
{
"created": "Wed, 10 May 2006 09:15:27 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Kroon",
"JA Valiente",
""
]
] | We discuss the existence of asymptotically Euclidean initial data sets to the vacuum Einstein field equations which would give rise (modulo an existence result for the evolution equations near spatial infinity) to developments with a past and a future null infinity of different smoothness. For simplicity, the analysis ... |
1105.1087 | Ujjal Debnath | Writambhara Chakraborty | Accelerating Expansion of the Universe | Ph.D Thesis (2010), 157 pages, 57 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This thesis concentrates on the accelerated expansion of the Universe
recently explored by measurements of redshift and luminosity-distance relations
of type Ia Supernovae. We have considered a model of the universe filled with
modified Chaplygin gas and barotropic fluid. The role of dynamical cosmological
constant h... | [
{
"created": "Wed, 4 May 2011 07:21:08 GMT",
"version": "v1"
}
] | 2011-05-06 | [
[
"Chakraborty",
"Writambhara",
""
]
] | This thesis concentrates on the accelerated expansion of the Universe recently explored by measurements of redshift and luminosity-distance relations of type Ia Supernovae. We have considered a model of the universe filled with modified Chaplygin gas and barotropic fluid. The role of dynamical cosmological constant has... |
2311.08033 | Pankaj Saini | Pankaj Saini, Sajad A. Bhat, Marc Favata, K. G. Arun | Eccentricity-induced systematic error on parametrized tests of general
relativity: Hierarchical Bayesian inference applied to a binary black hole
population | 24 pages, 9 figures, 1 table, published in Phys. Rev. D. v2: minor
changes to match the published version | Phys. Rev. D 109, 084056 (2024) | 10.1103/PhysRevD.109.084056 | LIGO Preprint No. P2300370 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One approach to testing general relativity (GR) introduces free parameters in
the post-Newtonian (PN) expansion of the gravitational-wave (GW) phase. If
systematic errors on these testing GR (TGR) parameters exceed the statistical
errors, this may signal a false violation of GR. Here, we consider systematic
errors pr... | [
{
"created": "Tue, 14 Nov 2023 09:53:01 GMT",
"version": "v1"
},
{
"created": "Sat, 11 May 2024 08:48:39 GMT",
"version": "v2"
}
] | 2024-05-14 | [
[
"Saini",
"Pankaj",
""
],
[
"Bhat",
"Sajad A.",
""
],
[
"Favata",
"Marc",
""
],
[
"Arun",
"K. G.",
""
]
] | One approach to testing general relativity (GR) introduces free parameters in the post-Newtonian (PN) expansion of the gravitational-wave (GW) phase. If systematic errors on these testing GR (TGR) parameters exceed the statistical errors, this may signal a false violation of GR. Here, we consider systematic errors prod... |
1803.01105 | Fabio Briscese | Fabio Briscese, Francesco Calogero | Isochronous solutions of Einstein's equations and their Newtonian limit | arXiv admin note: text overlap with arXiv:1406.7156 | Int. J. of Geom. Meth. in Mod. Phys. Vol. 15 (2018) 1850101 | 10.1142/S0219887818501013 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been recently demonstrated that it is possible to construct
isochronous cosmologies, extending to general relativity a result valid for
non-relativistic Hamiltonian systems. In this paper we review these findings
and we discuss the Newtonian limit of these isochronous spacetimes, showing
that it reproduces the... | [
{
"created": "Sat, 3 Mar 2018 04:19:24 GMT",
"version": "v1"
}
] | 2018-03-06 | [
[
"Briscese",
"Fabio",
""
],
[
"Calogero",
"Francesco",
""
]
] | It has been recently demonstrated that it is possible to construct isochronous cosmologies, extending to general relativity a result valid for non-relativistic Hamiltonian systems. In this paper we review these findings and we discuss the Newtonian limit of these isochronous spacetimes, showing that it reproduces the a... |
0802.0618 | Massimiliano Rinaldi | Massimiliano Rinaldi | Superluminal dispersion relations and the Unruh effect | Final discussion expanded, references added. Version accepted for
publication in Phys Rev D | Phys.Rev.D77:124029,2008 | 10.1103/PhysRevD.77.124029 | null | gr-qc hep-th | null | In the context of quantum gravity phenomenology, we study the Unruh effect in
the presence of superluminal dispersion relations. In particular, we estimate
the response function and the probability rate for an accelerated detector
coupled to a massless scalar field, whose dispersion relation becomes
essentially quadr... | [
{
"created": "Tue, 5 Feb 2008 13:52:38 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Feb 2008 15:57:22 GMT",
"version": "v2"
},
{
"created": "Mon, 26 May 2008 16:11:42 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Rinaldi",
"Massimiliano",
""
]
] | In the context of quantum gravity phenomenology, we study the Unruh effect in the presence of superluminal dispersion relations. In particular, we estimate the response function and the probability rate for an accelerated detector coupled to a massless scalar field, whose dispersion relation becomes essentially quadrat... |
1106.4984 | Richard Woodard | Cedric Deffayet, Gilles Esposito-Farese and Richard P. Woodard | Nonlocal metric formulations of MOND with sufficient lensing | 18 pages, uses Revtex4, revised for publication | Phys.Rev.D84:124054,2011 | 10.1103/PhysRevD.84.124054 | UFIFT-QG-11-02 | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate how to construct purely metric modifications of gravity which
agree with general relativity in the weak field regime appropriate to the solar
system, but which possess an ultra-weak field regime when the gravitational
acceleration becomes comparable to $a_0 \sim 10^{-10} {\rm m/s}^2$. In this
ultra-wea... | [
{
"created": "Fri, 24 Jun 2011 14:50:16 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Dec 2011 01:43:27 GMT",
"version": "v2"
}
] | 2011-12-30 | [
[
"Deffayet",
"Cedric",
""
],
[
"Esposito-Farese",
"Gilles",
""
],
[
"Woodard",
"Richard P.",
""
]
] | We demonstrate how to construct purely metric modifications of gravity which agree with general relativity in the weak field regime appropriate to the solar system, but which possess an ultra-weak field regime when the gravitational acceleration becomes comparable to $a_0 \sim 10^{-10} {\rm m/s}^2$. In this ultra-weak ... |
0808.3246 | Gustav Holzegel | G. Holzegel | Stability and decay-rates for the five-dimensional Schwarzschild metric
under biaxial perturbations | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we prove the non-linear asymptotic stability of the
five-dimensional Schwarzschild metric under biaxial vacuum perturbations. This
is the statement that the evolution of (SU(2) x U(1))-symmetric vacuum
perturbations of initial data for the five-dimensional Schwarzschild metric
finally converges in a sui... | [
{
"created": "Sun, 24 Aug 2008 13:29:27 GMT",
"version": "v1"
}
] | 2008-08-26 | [
[
"Holzegel",
"G.",
""
]
] | In this paper we prove the non-linear asymptotic stability of the five-dimensional Schwarzschild metric under biaxial vacuum perturbations. This is the statement that the evolution of (SU(2) x U(1))-symmetric vacuum perturbations of initial data for the five-dimensional Schwarzschild metric finally converges in a suita... |
1306.4750 | Lorenzo Sebastiani | R. Di Criscienzo, R. Myrzakulov and L. Sebastiani | Looking for empty topological wormhole spacetimes in $F(R)$-modified
gravity | 13 pages, published version | Classical and Quantum Gravity, v. 30, N23, 235013 (2013) | 10.1088/0264-9381/30/23/235013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Much attention has been recently devoted to modified theories of gravity in
the attempt to efficiently describe both early inflation and late-time
acceleration of our universe without referring to the cosmological constant or
other ad hoc kinds of fluids. The simplest models overcome General Relativity
simply by repl... | [
{
"created": "Thu, 20 Jun 2013 04:03:38 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Oct 2013 05:17:11 GMT",
"version": "v2"
}
] | 2015-06-16 | [
[
"Di Criscienzo",
"R.",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Sebastiani",
"L.",
""
]
] | Much attention has been recently devoted to modified theories of gravity in the attempt to efficiently describe both early inflation and late-time acceleration of our universe without referring to the cosmological constant or other ad hoc kinds of fluids. The simplest models overcome General Relativity simply by replac... |
1105.3245 | Alberto Carrasco Ferreira | Alberto Carrasco, Marc Mars | Uniqueness theorems for static spacetimes containing marginally outer
trapped surfaces | 30 pages, 9 figures | null | 10.1088/0264-9381/28/17/175018 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Marginally outer trapped surfaces are widely considered as the best
quasi-local replacements for event horizons of black holes in General
Relativity. However, this equivalence is far from being proved, even in
stationary and static situations. In this paper we study an important aspect of
this equivalence, namely whe... | [
{
"created": "Mon, 16 May 2011 23:31:43 GMT",
"version": "v1"
}
] | 2015-05-28 | [
[
"Carrasco",
"Alberto",
""
],
[
"Mars",
"Marc",
""
]
] | Marginally outer trapped surfaces are widely considered as the best quasi-local replacements for event horizons of black holes in General Relativity. However, this equivalence is far from being proved, even in stationary and static situations. In this paper we study an important aspect of this equivalence, namely wheth... |
1512.02247 | Aaron Zimmerman | Aaron Zimmerman and Zachary Mark | Damped and zero-damped quasinormal modes of charged, nearly extremal
black holes | 24 pages, 11 figures, typos corrected and footnotes removed to
reflect published version and errata | Phys. Rev. D 93, 044033 (2016), Phys. Rev. D 93, 089905(E) (2016) | 10.1103/PhysRevD.93.044033, 10.1103/PhysRevD.93.089905 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Despite recent progress, the complete understanding of the perturbations of
charged, rotating black holes as described by the Kerr-Newman metric remains an
open and fundamental problem in relativity. In this study, we explore the
existence of families of quasinormal modes of Kerr-Newman black holes whose
decay rates ... | [
{
"created": "Mon, 7 Dec 2015 21:13:01 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Apr 2016 15:29:41 GMT",
"version": "v2"
}
] | 2016-04-14 | [
[
"Zimmerman",
"Aaron",
""
],
[
"Mark",
"Zachary",
""
]
] | Despite recent progress, the complete understanding of the perturbations of charged, rotating black holes as described by the Kerr-Newman metric remains an open and fundamental problem in relativity. In this study, we explore the existence of families of quasinormal modes of Kerr-Newman black holes whose decay rates li... |
gr-qc/0403032 | Mihalis Dafermos | Mihalis Dafermos | Spherically symmetric spacetimes with a trapped surface | 14 pages, 8 figures, revised | Class.Quant.Grav. 22 (2005) 2221-2232 | 10.1088/0264-9381/22/11/019 | null | gr-qc | null | This paper investigates the global properties of a class of spherically
symmetric spacetimes. The class contains the maximal development of
asymptotically flat spherically symmetric initial data for a wide variety of
coupled Einstein-matter systems. For this class, it is proven here that the
existence of a single tra... | [
{
"created": "Mon, 8 Mar 2004 16:22:30 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Nov 2004 15:27:26 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Dafermos",
"Mihalis",
""
]
] | This paper investigates the global properties of a class of spherically symmetric spacetimes. The class contains the maximal development of asymptotically flat spherically symmetric initial data for a wide variety of coupled Einstein-matter systems. For this class, it is proven here that the existence of a single trapp... |
1309.0091 | Olivier Minazzoli | Olivier Minazzoli | The \gamma\ parameter in Brans-Dicke-like (light-)Scalar-Tensor theory
with a universal scalar/matter coupling | 6 pages, accepted in Phys. Rev. D. arXiv admin note: substantial text
overlap with arXiv:1208.2372 | Phys. Rev. D 88, 064050 (2013) | 10.1103/PhysRevD.88.064050 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The post-Newtonian parameter \gamma\ resulting from a universal scalar/matter
coupling is investigated in Brans-Dicke-like Scalar-Tensor theories where the
scalar potential is assumed to be negligible. Conversely to previous studies,
we use a perfect fluid formalism in order to get the explicit scalar-field
equation.... | [
{
"created": "Sat, 31 Aug 2013 10:21:22 GMT",
"version": "v1"
}
] | 2013-09-26 | [
[
"Minazzoli",
"Olivier",
""
]
] | The post-Newtonian parameter \gamma\ resulting from a universal scalar/matter coupling is investigated in Brans-Dicke-like Scalar-Tensor theories where the scalar potential is assumed to be negligible. Conversely to previous studies, we use a perfect fluid formalism in order to get the explicit scalar-field equation. I... |
gr-qc/9907003 | Gelu Belinchon | J. A. Belinchon | Cosmological models with variable constants | 15 pages. submitted to IJTP | Int.J.Theor.Phys.39:1669-1686,2000 | 10.1023/A:1003644614145 | null | gr-qc | null | The behavior of the constants, G,c,h,a,e,m and Lambda, considering them as
variable, in the framework of a flat cosmological model with FRW symmetries
described by a bulk viscous fluid and considering mechanisms of adiabatic
matter creation are investigated. Within two models; one with radiation
predominance and anot... | [
{
"created": "Thu, 1 Jul 1999 22:51:16 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Oct 1999 17:29:08 GMT",
"version": "v2"
},
{
"created": "Fri, 19 Nov 1999 21:09:34 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Belinchon",
"J. A.",
""
]
] | The behavior of the constants, G,c,h,a,e,m and Lambda, considering them as variable, in the framework of a flat cosmological model with FRW symmetries described by a bulk viscous fluid and considering mechanisms of adiabatic matter creation are investigated. Within two models; one with radiation predominance and anothe... |
1501.06960 | Changjun Gao | Changjun Gao and You-Gen Shen | Cosmic evolution of scalar fields with multiple vacua: generalized DBI
and quintessence | 8 pages, 9 figures, accepted by IJTP. A number of typos corrected | Int. J. Theor. Phys (2016) 55: 4532 | 10.1007/s10773-016-3076-x | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find a method to rewrite the equations of motion of scalar fields,
generalized DBI field and quintessence, in the autonomous form
for\emph{arbitrary} scalar potentials. With the aid of this method, we explore
the cosmic evolution of generalized DBI field and quintessence with the
potential of multiple vacua. Then ... | [
{
"created": "Wed, 28 Jan 2015 00:46:29 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jan 2015 07:42:03 GMT",
"version": "v2"
},
{
"created": "Thu, 5 Feb 2015 00:26:51 GMT",
"version": "v3"
},
{
"created": "Thu, 26 Feb 2015 05:17:50 GMT",
"version": "v4"
},
{
"cr... | 2016-09-19 | [
[
"Gao",
"Changjun",
""
],
[
"Shen",
"You-Gen",
""
]
] | We find a method to rewrite the equations of motion of scalar fields, generalized DBI field and quintessence, in the autonomous form for\emph{arbitrary} scalar potentials. With the aid of this method, we explore the cosmic evolution of generalized DBI field and quintessence with the potential of multiple vacua. Then we... |
1007.3365 | Petr Tretyakov | M.Skugoreva, A.Toporensky and P.Tretyakov | Cosmological dynamics in six-order gravity | null | Grav.Cosmol.17:110-118,2011 | 10.1134/S0202289311020198 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider cosmological dynamics in generalized modified gravity theory with
the $R\Box R$ term added to the action of the form $R+R^N$. Influence of $R
\Box R$ term to the known solutions of modified gravity is described. We show
that in particular case of $N=3$ these two non-Einstein terms are equally
important on... | [
{
"created": "Tue, 20 Jul 2010 08:55:07 GMT",
"version": "v1"
}
] | 2011-06-10 | [
[
"Skugoreva",
"M.",
""
],
[
"Toporensky",
"A.",
""
],
[
"Tretyakov",
"P.",
""
]
] | We consider cosmological dynamics in generalized modified gravity theory with the $R\Box R$ term added to the action of the form $R+R^N$. Influence of $R \Box R$ term to the known solutions of modified gravity is described. We show that in particular case of $N=3$ these two non-Einstein terms are equally important on p... |
2303.09215 | Yuqian Zhao | Yuqian Zhao, Bing Sun, Kai Lin and Zhoujian Cao | The Axial Gravitational Ringing of a Spherically Symmetric Black Hole
Surrounded by Dark Matter Spike | 12 pages, 5 figures, 4 tables | Phys. Rev. D 108, 024070(2023) | 10.1103/PhysRevD.108.024070 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Supermassive black holes at the center of each galaxy may be surrounded by
dark matter. Such dark matter admits a spike structure and vanishes at a
certain distance from the black hole. This dark matter will impact the
spacetime near the black hole and the related ringing gravitational waves can
show distinguished fe... | [
{
"created": "Thu, 16 Mar 2023 10:44:22 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Mar 2023 12:41:06 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Aug 2023 07:40:10 GMT",
"version": "v3"
}
] | 2023-08-02 | [
[
"Zhao",
"Yuqian",
""
],
[
"Sun",
"Bing",
""
],
[
"Lin",
"Kai",
""
],
[
"Cao",
"Zhoujian",
""
]
] | Supermassive black holes at the center of each galaxy may be surrounded by dark matter. Such dark matter admits a spike structure and vanishes at a certain distance from the black hole. This dark matter will impact the spacetime near the black hole and the related ringing gravitational waves can show distinguished feat... |
gr-qc/0401115 | Lars Samuelsson | Max Karlovini and Lars Samuelsson | Elastic Stars in General Relativity: III. Stiff ultrarigid exact
solutions | 20 pages, 6 figures. Added remarks on our numerical method as well as
the relation to the Ernst equation | Class.Quant.Grav. 21 (2004) 4531-4548 | 10.1088/0264-9381/21/19/003 | USITP 2004-2 | gr-qc | null | We present an equation of state for elastic matter which allows for purely
longitudinal elastic waves in all propagation directions, not just principal
directions. The speed of these waves is equal to the speed of light whereas the
transversal type speeds are also very high, comparable to but always strictly
less tha... | [
{
"created": "Wed, 28 Jan 2004 20:54:37 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Jan 2004 22:34:18 GMT",
"version": "v2"
},
{
"created": "Tue, 14 Sep 2004 11:12:56 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Karlovini",
"Max",
""
],
[
"Samuelsson",
"Lars",
""
]
] | We present an equation of state for elastic matter which allows for purely longitudinal elastic waves in all propagation directions, not just principal directions. The speed of these waves is equal to the speed of light whereas the transversal type speeds are also very high, comparable to but always strictly less than ... |
1602.02663 | Artur Alho | Artur Alho and Simone Calogero | A stellar model with diffusion in general relativity | 16 pages, 2 figures. v2: 17 pages, matches final published version | null | 10.1016/j.geomphys.2017.05.018 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a spherically symmetric stellar model in general relativity whose
interior consists of a pressureless fluid undergoing microscopic velocity
diffusion in a cosmological scalar field. We show that the diffusion dynamics
compel the interior to be spatially homogeneous, by which one can infer
immediately that... | [
{
"created": "Mon, 8 Feb 2016 17:42:56 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jun 2017 13:19:56 GMT",
"version": "v2"
}
] | 2017-08-23 | [
[
"Alho",
"Artur",
""
],
[
"Calogero",
"Simone",
""
]
] | We consider a spherically symmetric stellar model in general relativity whose interior consists of a pressureless fluid undergoing microscopic velocity diffusion in a cosmological scalar field. We show that the diffusion dynamics compel the interior to be spatially homogeneous, by which one can infer immediately that w... |
gr-qc/9905001 | Carey Carpenter Briggs | C. C. Briggs | Some General Expressions for the Coefficient of the 14th Chern Form | 11 pages | null | null | null | gr-qc | null | Some general expressions are given for the coefficient of the 14th Chern form
in terms of the Riemann-Christoffel curvature tensor and some of its
concomitants (e.g., Pontrjagin's characteristic tensors) for n-dimensional
differentiable manifolds having a general linear connection.
| [
{
"created": "Mon, 3 May 1999 02:55:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Briggs",
"C. C.",
""
]
] | Some general expressions are given for the coefficient of the 14th Chern form in terms of the Riemann-Christoffel curvature tensor and some of its concomitants (e.g., Pontrjagin's characteristic tensors) for n-dimensional differentiable manifolds having a general linear connection. |
0807.4221 | Lorenzo Iorio | Lorenzo Iorio | The impact of the oblateness of Regulus on the motion of its companion | LaTex, 6 pages, 5 figures, 1 table. Accepted by Astrophysics and
Space Science | Astrophys.SpaceSci.318:51-55,2008 | 10.1007/s10509-008-9889-1 | null | gr-qc astro-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The fast spinning B-star Regulus has recently been found to be orbited by a
fainter companion in a close circular path with orbital period P_b = 40.11(2)
d. Being its equatorial radius R_e 32% larger than the polar one R_p, Regulus
possesses a remarkable quadrupole mass moment Q. We investigate the effects of
Q on th... | [
{
"created": "Sat, 26 Jul 2008 07:22:27 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Aug 2008 19:30:28 GMT",
"version": "v2"
}
] | 2008-12-18 | [
[
"Iorio",
"Lorenzo",
""
]
] | The fast spinning B-star Regulus has recently been found to be orbited by a fainter companion in a close circular path with orbital period P_b = 40.11(2) d. Being its equatorial radius R_e 32% larger than the polar one R_p, Regulus possesses a remarkable quadrupole mass moment Q. We investigate the effects of Q on the ... |
2102.10112 | Jose M. M. Senovilla | Jos\'e M M Senovilla | Hoyos negros y sus misteriosos interiores (Black holes and their
mysterious interiors) | 8 pages. Invited commentary on the 2020 physics Nobel prize by the
Revista Espa\~nola de F\'{\i}sica (Spanish Physics Magazine). In Spanish | Rev. Esp. Fisica, vol. 34, number 4, (2020) 41-48 | null | null | gr-qc math-ph math.MP physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Singularity theorems constitute a major milestone of relativity. They
generated a panoply of fertile lines of research with dazzling physical
consequences.
(Los teoremas de singularidades constituyen uno de los mayores hitos de la
relatividad. Generaron una panoplia de f\'ertiles l\'ineas de investigaci\'on
con con... | [
{
"created": "Fri, 19 Feb 2021 16:10:55 GMT",
"version": "v1"
}
] | 2021-02-23 | [
[
"Senovilla",
"José M M",
""
]
] | Singularity theorems constitute a major milestone of relativity. They generated a panoply of fertile lines of research with dazzling physical consequences. (Los teoremas de singularidades constituyen uno de los mayores hitos de la relatividad. Generaron una panoplia de f\'ertiles l\'ineas de investigaci\'on con consecu... |
2404.00715 | Orlando Luongo | Alessio Belfiglio, Orlando Luongo, Stefano Mancini, and Sebastiano
Tomasi | Entanglement entropy in quantum black holes | 15 pages, 7 figures | null | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the entanglement entropy for a massive Klein-Gordon field in two
Schwarzschild-like quantum black hole spacetimes, also including a nonminimal
coupling term with the background scalar curvature. To compute the entanglement
entropy, we start from the standard spherical shell discretisation procedure,
tracin... | [
{
"created": "Sun, 31 Mar 2024 15:19:03 GMT",
"version": "v1"
}
] | 2024-04-02 | [
[
"Belfiglio",
"Alessio",
""
],
[
"Luongo",
"Orlando",
""
],
[
"Mancini",
"Stefano",
""
],
[
"Tomasi",
"Sebastiano",
""
]
] | We discuss the entanglement entropy for a massive Klein-Gordon field in two Schwarzschild-like quantum black hole spacetimes, also including a nonminimal coupling term with the background scalar curvature. To compute the entanglement entropy, we start from the standard spherical shell discretisation procedure, tracing ... |
gr-qc/9803035 | Carlos Barcelo Seron | C. Barcelo and L.J. Garay | Wormhole effective interactions in anti-de Sitter spacetime | 21 pages, LaTeX 2e, no figures | Int.J.Mod.Phys. D7 (1998) 623-645 | 10.1142/S0218271898000425 | null | gr-qc | null | The effects of asymptotically anti-de Sitter wormholes in low-energy field
theory are calculated in full detail for three different matter contents: a
conformal scalar field, an electromagnetic field and gravitons. There exists a
close relation between the choice of vacuum for the matter fields and the
selection of a... | [
{
"created": "Tue, 10 Mar 1998 16:31:03 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Barcelo",
"C.",
""
],
[
"Garay",
"L. J.",
""
]
] | The effects of asymptotically anti-de Sitter wormholes in low-energy field theory are calculated in full detail for three different matter contents: a conformal scalar field, an electromagnetic field and gravitons. There exists a close relation between the choice of vacuum for the matter fields and the selection of a b... |
1305.2588 | Lisa Glaser | Fay Dowker and Lisa Glaser | Causal set d'Alembertians for various dimensions | 14 pages, 1 figure, published in Class. Quantum Grav (text and figure
were updated to agree with the published version) | 2013,Class. Quantum Grav. 30 195016 | 10.1088/0264-9381/30/19/195016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose, for dimension d, a discrete Lorentz invariant operator on scalar
fields that approximates the Minkowski spacetime scalar d'Alembertian. For each
dimension, this gives rise to a scalar curvature estimator for causal sets, and
thence to a proposal for a causal set action.
| [
{
"created": "Sun, 12 May 2013 13:33:01 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Sep 2013 15:15:37 GMT",
"version": "v2"
}
] | 2013-09-13 | [
[
"Dowker",
"Fay",
""
],
[
"Glaser",
"Lisa",
""
]
] | We propose, for dimension d, a discrete Lorentz invariant operator on scalar fields that approximates the Minkowski spacetime scalar d'Alembertian. For each dimension, this gives rise to a scalar curvature estimator for causal sets, and thence to a proposal for a causal set action. |
gr-qc/0311041 | John Quiroga H. | Iver Brevik and John Quiroga Hurtado | Inflationary Dilatonic de Sitter Universe from Super Yang - Mills Theory
Perturbed by Scalars and Spinors | LaTeX, 12 pages | null | 10.1023/B:GERG.0000022579.16135.9b | null | gr-qc | null | In this paper a quantum N = 4 super Yang-Mills theory perturbed by
dilaton-coupled scalars and spinor fields is considered. The induced effective
action for such a theory is calculated on a dilaton-gravitational background
using the conformal anomaly found via the AdS/CFT correspondence. Considering
such an effective... | [
{
"created": "Thu, 13 Nov 2003 17:39:45 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Brevik",
"Iver",
""
],
[
"Hurtado",
"John Quiroga",
""
]
] | In this paper a quantum N = 4 super Yang-Mills theory perturbed by dilaton-coupled scalars and spinor fields is considered. The induced effective action for such a theory is calculated on a dilaton-gravitational background using the conformal anomaly found via the AdS/CFT correspondence. Considering such an effective a... |
0709.1488 | Andreas Freise | S. Hild and A. Freise | A novel concept for increasing the peak sensitivity of LIGO by detuning
the arm cavities | 8 pages, 4 figures | Class.Quant.Grav.24:5453-5460,2007 | 10.1088/0264-9381/24/22/010 | null | gr-qc | null | We introduce a concept that uses detuned arm cavities to increase the shot
noise limited sensitivity of LIGO without increasing the light power inside the
arm cavities. Numerical simulations show an increased sensitivity between 125
and 400 Hz, with a maximal improvement of about 80% around 225 Hz, while the
sensitiv... | [
{
"created": "Mon, 10 Sep 2007 21:10:59 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Hild",
"S.",
""
],
[
"Freise",
"A.",
""
]
] | We introduce a concept that uses detuned arm cavities to increase the shot noise limited sensitivity of LIGO without increasing the light power inside the arm cavities. Numerical simulations show an increased sensitivity between 125 and 400 Hz, with a maximal improvement of about 80% around 225 Hz, while the sensitivit... |
2309.10072 | Barak Shoshany | Barak Shoshany and Ben Snodgrass | Warp Drives and Closed Timelike Curves | 37 pages, 7 figures; corrected and substantially revised version | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is commonly accepted that superluminal travel may be used to facilitate
time travel. This is a purely special-relativistic argument, using the fact
that for observers in two frames of reference, separated by a spacelike
interval, the non-causal (spacelike) future of one observer includes part of
the causal past of... | [
{
"created": "Mon, 18 Sep 2023 18:37:30 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Apr 2024 18:03:01 GMT",
"version": "v2"
}
] | 2024-04-24 | [
[
"Shoshany",
"Barak",
""
],
[
"Snodgrass",
"Ben",
""
]
] | It is commonly accepted that superluminal travel may be used to facilitate time travel. This is a purely special-relativistic argument, using the fact that for observers in two frames of reference, separated by a spacelike interval, the non-causal (spacelike) future of one observer includes part of the causal past of t... |
gr-qc/9510015 | R. Beig, Univ. Wien. | R. Beig (Institut f\"ur Theoretische Physik, Universit\"at Wien) Piotr
T. Chrusciel (Departement de Mathematique, Faculte des Sciences, Tours) | Killing vectors in asymptotically flat space-times: I. Asymptotically
translational Killing vectors and the rigid positive energy theorem | 30 pages | J.Math.Phys. 37 (1996) 1939-1961 | 10.1063/1.531497 | null | gr-qc | null | We study Killing vector fields in asymptotically flat space-times. We prove
the following result, implicitly assumed in the uniqueness theory of stationary
black holes. If the conditions of the rigidity part of the positive energy
theorem are met, then in such space-times there are no asymptotically null
Killing vect... | [
{
"created": "Tue, 10 Oct 1995 10:28:54 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Dec 1995 12:38:57 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Oct 1996 13:11:53 GMT",
"version": "v3"
}
] | 2016-08-31 | [
[
"Beig",
"R.",
"",
"Institut für Theoretische Physik, Universität Wien"
],
[
"Chrusciel",
"Piotr T.",
"",
"Departement de Mathematique, Faculte des Sciences, Tours"
]
] | We study Killing vector fields in asymptotically flat space-times. We prove the following result, implicitly assumed in the uniqueness theory of stationary black holes. If the conditions of the rigidity part of the positive energy theorem are met, then in such space-times there are no asymptotically null Killing vector... |
1504.00072 | Yen-Kheng Lim | Gulmina Zaman Babar, Mubasher Jamil and Yen-Kheng Lim | Dynamics of a charged particle around a weakly magnetized naked
singularity | Added references, accepted for publication in Int.J.Mod.Phys.D | Int.J.Mod.Phys.D Vol. 25, No. 2 (2016) 1650024 | 10.1142/S0218271816500243 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the motion of a charged particle in the vicinity of a weakly
magnetized naked singularity. The escape velocity and energy of the particle
moving around the naked singularity after being kicked by another particle or
photon are investigated. Also at the innermost stable circular orbit (ISCO)
escape velocity... | [
{
"created": "Wed, 1 Apr 2015 00:36:48 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Apr 2015 05:52:37 GMT",
"version": "v2"
},
{
"created": "Mon, 28 Sep 2015 01:54:52 GMT",
"version": "v3"
},
{
"created": "Sat, 17 Oct 2015 02:08:24 GMT",
"version": "v4"
}
] | 2015-11-19 | [
[
"Babar",
"Gulmina Zaman",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Lim",
"Yen-Kheng",
""
]
] | We examine the motion of a charged particle in the vicinity of a weakly magnetized naked singularity. The escape velocity and energy of the particle moving around the naked singularity after being kicked by another particle or photon are investigated. Also at the innermost stable circular orbit (ISCO) escape velocity a... |
1910.09267 | Sven Zschocke | Sven Zschocke | Post-linear metric of a compact source of matter | 32 pages, 2 figures | Physical Review D 100 (2019) 084005 | 10.1103/PhysRevD.100.084005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Multipolar Post-Minkowskian (MPM) formalism represents an approach for
determining the metric density in the exterior of a compact source of matter.
In the MPM formalism the metric density is given in harmonic coordinates and in
terms of symmetric tracefree (STF) multipoles. In this investigation, the
post-linear... | [
{
"created": "Mon, 21 Oct 2019 11:34:42 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Oct 2019 10:20:19 GMT",
"version": "v2"
}
] | 2019-10-30 | [
[
"Zschocke",
"Sven",
""
]
] | The Multipolar Post-Minkowskian (MPM) formalism represents an approach for determining the metric density in the exterior of a compact source of matter. In the MPM formalism the metric density is given in harmonic coordinates and in terms of symmetric tracefree (STF) multipoles. In this investigation, the post-linear m... |
2311.11033 | Xiang-Hua Zhai | Ping Li, Yong-Qiang Liu and Xiang-Hua Zhai | Accretion of the relativistic Vlasov gas onto a Kerr black hole | 28 pages, 11 figures, accepted for publication in Physical Review D | null | null | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the accretion of relativistic Vlasov gas onto a Kerr black hole,
regarding the particles as distributed throughout all the space, other than
just in the equatorial plane. We solve the relativistic Liouville equation in
the full $3+1$ dimensional framework of Kerr geometry. For the flow that is
stationary and... | [
{
"created": "Sat, 18 Nov 2023 10:45:59 GMT",
"version": "v1"
}
] | 2023-11-21 | [
[
"Li",
"Ping",
""
],
[
"Liu",
"Yong-Qiang",
""
],
[
"Zhai",
"Xiang-Hua",
""
]
] | We study the accretion of relativistic Vlasov gas onto a Kerr black hole, regarding the particles as distributed throughout all the space, other than just in the equatorial plane. We solve the relativistic Liouville equation in the full $3+1$ dimensional framework of Kerr geometry. For the flow that is stationary and a... |
2407.21349 | Sergei V. Ketov | Shunsuke Toyama and Sergei V. Ketov | Starobinsky inflation beyond the leading order | 13 pages, no figures, LaTeX; a reference added | null | null | IPMU24-0033 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The Starobinsky model of cosmological inflation in four spacetime dimensions
is reviewed with the emphasis on impact of quantum gravity corrections. As a
specific example of the quantum corrections, the Grisaru-Zanon quartic
curvature terms in the gravitational effective action of closed superstrings
are chosen. Thos... | [
{
"created": "Wed, 31 Jul 2024 05:40:44 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Aug 2024 07:24:49 GMT",
"version": "v2"
}
] | 2024-08-06 | [
[
"Toyama",
"Shunsuke",
""
],
[
"Ketov",
"Sergei V.",
""
]
] | The Starobinsky model of cosmological inflation in four spacetime dimensions is reviewed with the emphasis on impact of quantum gravity corrections. As a specific example of the quantum corrections, the Grisaru-Zanon quartic curvature terms in the gravitational effective action of closed superstrings are chosen. Those ... |
2309.05045 | Cheng-Yong Zhang | Cheng-Yong Zhang, Qian Chen, Yuxuan Liu, Yu Tian, Bin Wang, Hongbao
Zhang | Nonlinear self-interaction induced black hole bomb | 7 pages, 5 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present the first alternative mechanisms to trigger black hole bomb
phenomena beyond the famous superradiant instability. By incorporating
nonlinear self-interaction into the massive charged scalar field in general
relativity, we discover that the allowed static solutions suggest two such
novel dynamic mechanisms,... | [
{
"created": "Sun, 10 Sep 2023 14:48:06 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Jul 2024 00:05:28 GMT",
"version": "v2"
}
] | 2024-07-15 | [
[
"Zhang",
"Cheng-Yong",
""
],
[
"Chen",
"Qian",
""
],
[
"Liu",
"Yuxuan",
""
],
[
"Tian",
"Yu",
""
],
[
"Wang",
"Bin",
""
],
[
"Zhang",
"Hongbao",
""
]
] | We present the first alternative mechanisms to trigger black hole bomb phenomena beyond the famous superradiant instability. By incorporating nonlinear self-interaction into the massive charged scalar field in general relativity, we discover that the allowed static solutions suggest two such novel dynamic mechanisms, w... |
gr-qc/0003079 | dhZhang | De-Hai Zhang (Graduate School, Academia Sinica) | Quantum Creation of Closed Universe with Both Effects of Tunneling and
Well | 8 pages, no figures, Latex | null | 10.1088/0253-6102/35/5/635 | GS-AS-000316 | gr-qc astro-ph hep-ph hep-th | null | A new ''twice loose shoe'' method in the Wheeler-DeWitt equation of the
universe wave function on the cosmic scale factor a and a scalar field $\phi$
is suggested in this letter. We analysis the both affects come from the
tunneling effect of a and the potential well effect of $\phi$, and obtain the
initial values $a_... | [
{
"created": "Mon, 20 Mar 2000 07:33:25 GMT",
"version": "v1"
}
] | 2018-01-17 | [
[
"Zhang",
"De-Hai",
"",
"Graduate School, Academia Sinica"
]
] | A new ''twice loose shoe'' method in the Wheeler-DeWitt equation of the universe wave function on the cosmic scale factor a and a scalar field $\phi$ is suggested in this letter. We analysis the both affects come from the tunneling effect of a and the potential well effect of $\phi$, and obtain the initial values $a_0$... |
2105.07589 | Pitayuth Wongjun | P. Boonserm, C. H. Chen, T. Ngampitipan, and P. Wongjun | Greybody factor for massive fermion emitted by a black hole in dRGT
massive gravity theory | 40 pages, 16 figures, 1 table; V2 added Ref | null | 10.1103/PhysRevD.104.084054 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The greybody factor of the massive Dirac field around the black hole in the
dRGT massive gravity theory is investigated using the rigorous bound and the
WKB approximation methods. In both methods, the greybody factor significantly
depends on the shape of the potential. If the potential is smaller, there is
more proba... | [
{
"created": "Mon, 17 May 2021 03:23:18 GMT",
"version": "v1"
},
{
"created": "Tue, 25 May 2021 03:53:36 GMT",
"version": "v2"
}
] | 2021-10-27 | [
[
"Boonserm",
"P.",
""
],
[
"Chen",
"C. H.",
""
],
[
"Ngampitipan",
"T.",
""
],
[
"Wongjun",
"P.",
""
]
] | The greybody factor of the massive Dirac field around the black hole in the dRGT massive gravity theory is investigated using the rigorous bound and the WKB approximation methods. In both methods, the greybody factor significantly depends on the shape of the potential. If the potential is smaller, there is more probabi... |
gr-qc/9403042 | Donald Marolf | Abhay Ashtekar, Donald Marolf, and Jose Mourao | Integration on the space of Connections Modulo Gauge Transformations | 18 pages, CGPG-94/3-4, References added and typographic mistakes
revised | Proc. of the Cornelius Lanczos Centenary Conference ed. by J.D.
Brown et. al. (SIAM, Philadelphia, 1994) | null | null | gr-qc hep-th | null | A summary of the known results on integration theory on the space of
connections modulo gauge transformations is presented and its significance to
quantum theories of gauge fields and gravity is discussed. The emphasis is on
the underlying ideas rather than the technical subtleties.
| [
{
"created": "Tue, 22 Mar 1994 02:38:02 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Mar 1994 20:56:39 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Apr 1994 16:08:12 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Marolf",
"Donald",
""
],
[
"Mourao",
"Jose",
""
]
] | A summary of the known results on integration theory on the space of connections modulo gauge transformations is presented and its significance to quantum theories of gauge fields and gravity is discussed. The emphasis is on the underlying ideas rather than the technical subtleties. |
1408.0790 | Cornelius Rampf | Florian Kuhnel and Cornelius Rampf | Astrophysical Bose-Einstein Condensates and Superradiance | 11 pages, 3 figures, version published in PRD | Phys. Rev. D 90, 103526 (2014) | 10.1103/PhysRevD.90.103526 | null | gr-qc astro-ph.CO astro-ph.GA cond-mat.other | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate gravitational analogue models to describe slowly rotating
objects (e.g., dark-matter halos, or boson stars) in terms of Bose-Einstein
condensates, trapped in their own gravitational potentials. We begin with a
modified Gross-Pitaevskii equation, and show that the resulting background
equations of motio... | [
{
"created": "Mon, 4 Aug 2014 19:59:55 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Nov 2014 21:00:35 GMT",
"version": "v2"
}
] | 2014-11-26 | [
[
"Kuhnel",
"Florian",
""
],
[
"Rampf",
"Cornelius",
""
]
] | We investigate gravitational analogue models to describe slowly rotating objects (e.g., dark-matter halos, or boson stars) in terms of Bose-Einstein condensates, trapped in their own gravitational potentials. We begin with a modified Gross-Pitaevskii equation, and show that the resulting background equations of motion ... |
gr-qc/9511030 | Renate Loll | R. Loll (INFN, Firenze) | Spectrum of the Volume Operator in Quantum Gravity | 14 pages, plain tex, 4 figures (postscript, compressed and
uu-encoded) | Nucl.Phys. B460 (1996) 143-154 | 10.1016/0550-3213(95)00627-3 | DFF 235/11/95 | gr-qc hep-th | null | The volume operator is an important kinematical quantity in the
non-perturbative approach to four-dimensional quantum gravity in the connection
formulation. We give a general algorithm for computing its spectrum when acting
on four-valent spin network states, evaluate some of the eigenvalue formulae
explicitly, and d... | [
{
"created": "Thu, 9 Nov 1995 16:47:39 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Loll",
"R.",
"",
"INFN, Firenze"
]
] | The volume operator is an important kinematical quantity in the non-perturbative approach to four-dimensional quantum gravity in the connection formulation. We give a general algorithm for computing its spectrum when acting on four-valent spin network states, evaluate some of the eigenvalue formulae explicitly, and dis... |
0905.2662 | Muhammad Sharif | M. Sharif and Sajid Sultan | Tilted Cylindrically Symmetric Self-Similar Solutions | 17 pages, accepted for publication in Acta Physica Polonica B | Acta Phys.Polon.B40:1553-1568,2009 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to explore tilted kinematic self-similar solutions of
the the general cylindrical symmetric spacetimes. These solutions are of the
first, zeroth, second and infinite kinds for the perfect fluid and dust cases.
Three different equations of state are used to obtain these solutions. We
obtain a tot... | [
{
"created": "Sat, 16 May 2009 07:44:34 GMT",
"version": "v1"
}
] | 2009-07-24 | [
[
"Sharif",
"M.",
""
],
[
"Sultan",
"Sajid",
""
]
] | This paper is devoted to explore tilted kinematic self-similar solutions of the the general cylindrical symmetric spacetimes. These solutions are of the first, zeroth, second and infinite kinds for the perfect fluid and dust cases. Three different equations of state are used to obtain these solutions. We obtain a total... |
1408.4431 | Philippe G. LeFloch | Dan A. Lee and Philippe G. LeFloch | The positive mass theorem for manifolds with distributional curvature | 26 pages | null | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We formulate and prove a positive mass theorem for n-dimensional spin
manifolds whose metrics have only the Sobolev regularity $C^0 \cap W^{1,n}$. At
this level of regularity, the curvature of the metric is defined in the
distributional sense only, and we propose here a (generalized) notion of ADM
mass for such a met... | [
{
"created": "Tue, 19 Aug 2014 19:17:53 GMT",
"version": "v1"
}
] | 2014-08-20 | [
[
"Lee",
"Dan A.",
""
],
[
"LeFloch",
"Philippe G.",
""
]
] | We formulate and prove a positive mass theorem for n-dimensional spin manifolds whose metrics have only the Sobolev regularity $C^0 \cap W^{1,n}$. At this level of regularity, the curvature of the metric is defined in the distributional sense only, and we propose here a (generalized) notion of ADM mass for such a metri... |
0806.1731 | Slava G. Turyshev | Slava G. Turyshev | Experimental Tests of General Relativity | revtex4, 30 pages, 10 figures | Ann.Rev.Nucl.Part.Sci.58:207-248,2008 | 10.1146/annurev.nucl.58.020807.111839 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein's general theory of relativity is the standard theory of gravity,
especially where the needs of astronomy, astrophysics, cosmology and
fundamental physics are concerned. As such, this theory is used for many
practical purposes involving spacecraft navigation, geodesy, and time transfer.
Here I review the fou... | [
{
"created": "Tue, 10 Jun 2008 19:57:33 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Jun 2008 19:32:48 GMT",
"version": "v2"
}
] | 2011-08-17 | [
[
"Turyshev",
"Slava G.",
""
]
] | Einstein's general theory of relativity is the standard theory of gravity, especially where the needs of astronomy, astrophysics, cosmology and fundamental physics are concerned. As such, this theory is used for many practical purposes involving spacecraft navigation, geodesy, and time transfer. Here I review the found... |
1607.03507 | Muhammad Sharif | M. Sharif and Sehrish Iftikhar | Dynamics of Particles Near Black Hole with Higher Dimensions | 19 pages, 3 figure, to appear in EPJC | Eur. Phys. J. C 76(2016)404 | 10.1140/epjc/s10052-016-4244-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper explores the dynamics of particles in higher dimensions. For this
purpose, we discuss some interesting features related to the motion of
particles near Myers-Perry black hole with arbitrary extra dimensions as well
as single non-zero spin parameter. Assuming it as a supermassive black hole at
the center of... | [
{
"created": "Fri, 1 Jul 2016 02:24:49 GMT",
"version": "v1"
}
] | 2016-08-24 | [
[
"Sharif",
"M.",
""
],
[
"Iftikhar",
"Sehrish",
""
]
] | This paper explores the dynamics of particles in higher dimensions. For this purpose, we discuss some interesting features related to the motion of particles near Myers-Perry black hole with arbitrary extra dimensions as well as single non-zero spin parameter. Assuming it as a supermassive black hole at the center of g... |
0803.3710 | Christodoulakis Theodosios | Petros A. Terzis, T. Cristodoulakis | The General Solution of Bianchi Type $VII_h$ Vacuum Cosmology | latex2e source file, 27 pages, 2 tables, no fiures | Gen.Rel.Grav. 41 (2009) 469-495 | 10.1007/s10714-008-0678-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The theory of symmetries of systems of coupled, ordinary differential
equations (ODE) is used to develop a concise algorithm in order to obtain the
entire space of solutions to vacuum Bianchi Einstein Field Equations (EFEs).
The symmetries used are the well known automorphisms of the Lie algebra for the
corresponding... | [
{
"created": "Wed, 26 Mar 2008 12:15:14 GMT",
"version": "v1"
}
] | 2013-05-06 | [
[
"Terzis",
"Petros A.",
""
],
[
"Cristodoulakis",
"T.",
""
]
] | The theory of symmetries of systems of coupled, ordinary differential equations (ODE) is used to develop a concise algorithm in order to obtain the entire space of solutions to vacuum Bianchi Einstein Field Equations (EFEs). The symmetries used are the well known automorphisms of the Lie algebra for the corresponding i... |
1101.5396 | Holger Pletsch | Holger J. Pletsch | Sliding coherence window technique for hierarchical detection of
continuous gravitational waves | 11 pages, 4 figures | Phys.Rev.D83:122003,2011 | 10.1103/PhysRevD.83.122003 | LIGO-P1000130-v3, AEI-2010-181 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A novel hierarchical search technique is presented for all-sky surveys for
continuous gravitational-wave sources, such as rapidly spinning nonaxisymmetric
neutron stars. Analyzing yearlong detector data sets over realistic ranges of
parameter space using fully coherent matched-filtering is computationally
prohibitive... | [
{
"created": "Thu, 27 Jan 2011 21:11:23 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jun 2011 09:24:23 GMT",
"version": "v2"
}
] | 2015-03-18 | [
[
"Pletsch",
"Holger J.",
""
]
] | A novel hierarchical search technique is presented for all-sky surveys for continuous gravitational-wave sources, such as rapidly spinning nonaxisymmetric neutron stars. Analyzing yearlong detector data sets over realistic ranges of parameter space using fully coherent matched-filtering is computationally prohibitive. ... |
1011.1325 | Raymond Chiao Y. | R. Y. Chiao | Figure "8" gravitational-wave antenna using a superconducting-core
coaxial cable: Continuity equation and its superluminal consequences | White paper, 17 pages, 3 figures | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A novel gravitational-wave antenna is proposed based on the prediction that
supercurrents induced by gravitational waves in a superconductor that is bent
into the shape of a figure "8" will couple efficiently to such waves.
| [
{
"created": "Fri, 5 Nov 2010 06:01:40 GMT",
"version": "v1"
}
] | 2010-11-08 | [
[
"Chiao",
"R. Y.",
""
]
] | A novel gravitational-wave antenna is proposed based on the prediction that supercurrents induced by gravitational waves in a superconductor that is bent into the shape of a figure "8" will couple efficiently to such waves. |
1201.1827 | Yousef Bisabr | Yousef Bisabr (Farzan-Nahad) | Cosmic Evolution in a Modified Brans-Dicke Theory | 11 pages, 3 figures, To appear in Astrophysics and Space Science | Astrophys Space Sci (2012) 339:87-92 | 10.1007/s10509-012-0976-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider Brans-Dicke theory with a self-interacting potential in Einstein
conformal frame. We introduce a class of solutions in which an accelerating
expansion is possible in a spatially flat universe for positive and large
values of the Brans-Dicke parameter consistent with local gravity experiments.
In this Eins... | [
{
"created": "Mon, 9 Jan 2012 16:23:52 GMT",
"version": "v1"
}
] | 2012-05-03 | [
[
"Bisabr",
"Yousef",
"",
"Farzan-Nahad"
]
] | We consider Brans-Dicke theory with a self-interacting potential in Einstein conformal frame. We introduce a class of solutions in which an accelerating expansion is possible in a spatially flat universe for positive and large values of the Brans-Dicke parameter consistent with local gravity experiments. In this Einste... |
gr-qc/9705030 | A. Mikovic | A. Mikovic | General Solution for Self-Gravitating Spherical Null Dust | 9 pages, Latex, 1 figure | Phys.Rev.D56:6067-6070,1997 | 10.1103/PhysRevD.56.R6067 | FTUV-97-24 | gr-qc hep-th | null | We find the general solution of equations of motion for self-gravitating
spherical null dust as a perturbative series in powers of the outgoing matter
energy-momentum tensor, with the lowest order term being the Vaidya solution
for the ingoing matter. This is done by representing the null-dust model as a
2d dilaton g... | [
{
"created": "Tue, 13 May 1997 13:03:09 GMT",
"version": "v1"
}
] | 2009-01-16 | [
[
"Mikovic",
"A.",
""
]
] | We find the general solution of equations of motion for self-gravitating spherical null dust as a perturbative series in powers of the outgoing matter energy-momentum tensor, with the lowest order term being the Vaidya solution for the ingoing matter. This is done by representing the null-dust model as a 2d dilaton gra... |
1909.11011 | Antoni Ramos Buades | Antoni Ramos-Buades, Sascha Husa, Geraint Pratten, H\'ector
Estell\'es, Cecilio Garc\'ia-Quir\'os, Maite Mateu-Lucena, Marta Colleoni and
Rafel Jaume | A first survey of spinning eccentric black hole mergers: Numerical
relativity simulations, hybrid waveforms, and parameter estimation | Matching published version | Phys. Rev. D 101, 083015 (2020) | 10.1103/PhysRevD.101.083015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze a new numerical relativity dataset of spinning but nonprecessing
binary black holes on eccentric orbits, with eccentricities from approximately
$0.1$ to $0.5$, with dimensionless spins up to $0.75$ included at mass ratios
$q=m_1/m_2 = (1, 2)$, and further nonspinning binaries at mass ratios $q =
(1.5, 3, 4... | [
{
"created": "Tue, 24 Sep 2019 15:46:42 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Apr 2020 10:30:45 GMT",
"version": "v2"
}
] | 2020-04-14 | [
[
"Ramos-Buades",
"Antoni",
""
],
[
"Husa",
"Sascha",
""
],
[
"Pratten",
"Geraint",
""
],
[
"Estellés",
"Héctor",
""
],
[
"García-Quirós",
"Cecilio",
""
],
[
"Mateu-Lucena",
"Maite",
""
],
[
"Colleoni",
"Marta",
... | We analyze a new numerical relativity dataset of spinning but nonprecessing binary black holes on eccentric orbits, with eccentricities from approximately $0.1$ to $0.5$, with dimensionless spins up to $0.75$ included at mass ratios $q=m_1/m_2 = (1, 2)$, and further nonspinning binaries at mass ratios $q = (1.5, 3, 4)$... |
1802.04001 | Sheyda Najafi | Sh. Najafi, M. T. Mirtorabi, Z. Ansari, D. F. Mota | Red Giant evolution in Modified Gravity | 27 pages, 15 figures | null | 10.1088/1475-7516/2019/02/011 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the chameleon profile in inhomogeneous density
distributions and find that the fifth force in thin shell near the surface is
weaker from what expected in homogeneous density distributions. Also, we check
the validity of quasi-static approximation for the chameleon scalar field in
the astrophys... | [
{
"created": "Mon, 12 Feb 2018 12:11:07 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Feb 2018 17:20:16 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Jul 2018 13:12:24 GMT",
"version": "v3"
},
{
"created": "Mon, 4 Feb 2019 18:53:12 GMT",
"version": "v4"
}
] | 2019-02-20 | [
[
"Najafi",
"Sh.",
""
],
[
"Mirtorabi",
"M. T.",
""
],
[
"Ansari",
"Z.",
""
],
[
"Mota",
"D. F.",
""
]
] | In this paper, we study the chameleon profile in inhomogeneous density distributions and find that the fifth force in thin shell near the surface is weaker from what expected in homogeneous density distributions. Also, we check the validity of quasi-static approximation for the chameleon scalar field in the astrophysic... |
1510.08706 | Johannes Th\"urigen | Johannes Th\"urigen | Discrete quantum geometries and their effective dimension | PhD thesis, Humboldt-Universit\"at zu Berlin;
urn:nbn:de:kobv:11-100232371;
http://edoc.hu-berlin.de/docviews/abstract.php?id=42042 | null | 10.18452/17309 | null | gr-qc hep-th physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In several approaches towards a quantum theory of gravity, such as group
field theory and loop quantum gravity, quantum states and histories of the
geometric degrees of freedom turn out to be based on discrete spacetime. The
most pressing issue is then how the smooth geometries of general relativity,
expressed in ter... | [
{
"created": "Thu, 29 Oct 2015 14:30:07 GMT",
"version": "v1"
}
] | 2018-08-01 | [
[
"Thürigen",
"Johannes",
""
]
] | In several approaches towards a quantum theory of gravity, such as group field theory and loop quantum gravity, quantum states and histories of the geometric degrees of freedom turn out to be based on discrete spacetime. The most pressing issue is then how the smooth geometries of general relativity, expressed in terms... |
2007.09169 | Jiri Podolsky | Jiri Podolsky, Adam Vratny | Accelerating NUT black holes | 37 pages, 6 figures | Phys. Rev. D 102, 084024 (2020) | 10.1103/PhysRevD.102.084024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present and analyze a class of exact spacetimes which describe
accelerating black holes with a NUT parameter. First, we verify that the
intricate metric found by Chng, Mann and Stelea in 2006 indeed solves
Einstein's vacuum field equations of General Relativity. We explicitly
calculate all components of the Weyl t... | [
{
"created": "Fri, 17 Jul 2020 18:12:48 GMT",
"version": "v1"
}
] | 2020-10-14 | [
[
"Podolsky",
"Jiri",
""
],
[
"Vratny",
"Adam",
""
]
] | We present and analyze a class of exact spacetimes which describe accelerating black holes with a NUT parameter. First, we verify that the intricate metric found by Chng, Mann and Stelea in 2006 indeed solves Einstein's vacuum field equations of General Relativity. We explicitly calculate all components of the Weyl ten... |
1904.07670 | Behzad Eslam Panah | B. Eslam Panah, and S. H. Hendi | Black hole solutions correspondence between conformal and massive
theories of gravity | 7 pages, 1 figure | EPL 125, 60006 (2019) | 10.1209/0295-5075/125/60006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, a correspondence between black hole solutions of conformal and
massive theories of gravity is found. It is seen that this correspondence
imposes some constraints on parameters of these theories. What is more, a
relation between the mass of black holes and the parameters of massive gravity
is found. Inde... | [
{
"created": "Mon, 15 Apr 2019 07:34:44 GMT",
"version": "v1"
},
{
"created": "Thu, 30 May 2019 08:05:00 GMT",
"version": "v2"
}
] | 2019-05-31 | [
[
"Panah",
"B. Eslam",
""
],
[
"Hendi",
"S. H.",
""
]
] | In this work, a correspondence between black hole solutions of conformal and massive theories of gravity is found. It is seen that this correspondence imposes some constraints on parameters of these theories. What is more, a relation between the mass of black holes and the parameters of massive gravity is found. Indeed... |
2407.09589 | Sai Swagat Mishra | N. S. Kavya, Sai Swagat Mishra, P.K. Sahoo, V. Venkatesha | Can $f(T)$ models play a bridge between early and late time Universe? | MNRAS accepted version | Monthly Notices of the Royal Astronomical Society, 532(3) (2024)
3126 | 10.1093/mnras/stae1723 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by-nc-sa/4.0/ | The ability of Big Bang Nucleosynthesis theory to accurately predict the
primordial abundances of helium and deuterium, as well as the baryon content of
the Universe, is considered one of the most significant achievements in modern
physics. In the present study, we consider two highly motivated hybrid $f(T)$
models a... | [
{
"created": "Fri, 12 Jul 2024 17:18:04 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jul 2024 08:57:04 GMT",
"version": "v2"
}
] | 2024-07-24 | [
[
"Kavya",
"N. S.",
""
],
[
"Mishra",
"Sai Swagat",
""
],
[
"Sahoo",
"P. K.",
""
],
[
"Venkatesha",
"V.",
""
]
] | The ability of Big Bang Nucleosynthesis theory to accurately predict the primordial abundances of helium and deuterium, as well as the baryon content of the Universe, is considered one of the most significant achievements in modern physics. In the present study, we consider two highly motivated hybrid $f(T)$ models and... |
gr-qc/9912065 | Benjamin J. Owen | Benjamin J. Owen (Albert Einstein Institut) | Gravitational waves from the r-modes of rapidly rotating neutron stars | 10 pages, 2 figures, 3rd Edoardo Amaldi Conference on Gravitational
Waves | null | 10.1063/1.1291840 | AEI-1999-52 | gr-qc astro-ph | null | Since the last Amaldi meeting in 1997 we have learned that the r-modes of
rapidly rotating neutron stars are unstable to gravitational radiation reaction
in astrophysically realistic conditions. Newborn neutron stars rotating more
rapidly than about 100Hz may spin down to that frequency during up to one year
after th... | [
{
"created": "Wed, 15 Dec 1999 16:45:40 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Owen",
"Benjamin J.",
"",
"Albert Einstein Institut"
]
] | Since the last Amaldi meeting in 1997 we have learned that the r-modes of rapidly rotating neutron stars are unstable to gravitational radiation reaction in astrophysically realistic conditions. Newborn neutron stars rotating more rapidly than about 100Hz may spin down to that frequency during up to one year after the ... |
1710.08630 | Xing-Hui Feng | Jincheng An, Jun Peng, Yan Liu, Xing-Hui Feng | Kerr-Sen Black Hole as Accelerator for Spinning Particles | Latex,17 pages,1 figure,minor revision,accepted by PRD | Phys. Rev. D 97, 024003 (2018) | 10.1103/PhysRevD.97.024003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been proved that arbitrarily high-energy collision between two
particles can occur near the horizon of an extremal Kerr black hole as long as
the energy $E$ and angular momentum $L$ of one particle satisfies a critical
relation, which is called the BSW mechanism. Previous researchers mainly
concentrate on geod... | [
{
"created": "Tue, 24 Oct 2017 07:27:26 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Oct 2017 05:39:35 GMT",
"version": "v2"
},
{
"created": "Wed, 29 Nov 2017 05:43:34 GMT",
"version": "v3"
}
] | 2018-01-10 | [
[
"An",
"Jincheng",
""
],
[
"Peng",
"Jun",
""
],
[
"Liu",
"Yan",
""
],
[
"Feng",
"Xing-Hui",
""
]
] | It has been proved that arbitrarily high-energy collision between two particles can occur near the horizon of an extremal Kerr black hole as long as the energy $E$ and angular momentum $L$ of one particle satisfies a critical relation, which is called the BSW mechanism. Previous researchers mainly concentrate on geodes... |
1105.3069 | Kentaro Takami | Kentaro Takami, Luciano Rezzolla and Shin'ichirou Yoshida | A quasi-radial stability criterion for rotating relativistic stars | 5 pages, 4 figures; accepted to MNRAS Letters | Mon.Not.Roy.Astron.Soc.416:L1-L5,2011 | 10.1111/j.1745-3933.2011.01085.x | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The stability properties of relativistic stars against gravitational collapse
to black hole is a classical problem in general relativity. A sufficient
criterion for secular instability was established by Friedman, Ipser and Sorkin
(1988), who proved that a sequence of uniformly rotating barotropic stars is
secularly ... | [
{
"created": "Mon, 16 May 2011 11:34:10 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jun 2011 13:35:36 GMT",
"version": "v2"
}
] | 2011-08-22 | [
[
"Takami",
"Kentaro",
""
],
[
"Rezzolla",
"Luciano",
""
],
[
"Yoshida",
"Shin'ichirou",
""
]
] | The stability properties of relativistic stars against gravitational collapse to black hole is a classical problem in general relativity. A sufficient criterion for secular instability was established by Friedman, Ipser and Sorkin (1988), who proved that a sequence of uniformly rotating barotropic stars is secularly un... |
1503.08331 | Masashi Kimura | Mandar Patil, Pankaj S. Joshi, Ken-ichi Nakao, Masashi Kimura,
Tomohiro Harada | Timescale for trans-Planckian collisions in Kerr spacetime | 15 pages, v2: minor revisions, v3: minor revisions, to appear in EPL | null | 10.1209/0295-5075/110/30004 | OCU-PHYS-421, AP-GR-121, RUP-15-7 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We make a critical comparison between ultra-high energy particle collisions
around an extremal Kerr black hole and that around an over-spinning Kerr
singularity, mainly focusing on the issue of the timescale of collisions. We
show that the time required for two massive particles with the proton mass or
two massless p... | [
{
"created": "Sat, 28 Mar 2015 17:43:42 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Apr 2015 14:41:57 GMT",
"version": "v2"
},
{
"created": "Fri, 15 May 2015 09:54:52 GMT",
"version": "v3"
}
] | 2015-06-11 | [
[
"Patil",
"Mandar",
""
],
[
"Joshi",
"Pankaj S.",
""
],
[
"Nakao",
"Ken-ichi",
""
],
[
"Kimura",
"Masashi",
""
],
[
"Harada",
"Tomohiro",
""
]
] | We make a critical comparison between ultra-high energy particle collisions around an extremal Kerr black hole and that around an over-spinning Kerr singularity, mainly focusing on the issue of the timescale of collisions. We show that the time required for two massive particles with the proton mass or two massless par... |
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