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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2406.03588 | Mohammad Reza Mehdizadeh | Mohammad Reza Mehdizadeh and Amir Hadi Ziaie | Novel Casimir wormholes in Einstein gravity | 32 pages and 22 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the context of General Relativity (GR), violation of the null energy
condition (NEC) is necessary for existence of static spherically symmetric
wormhole solutions. Also, it is a well-known fact that the energy conditions
are violated by certain quantum fields, such as the Casimir effect. The
magnitude and sign of ... | [
{
"created": "Wed, 5 Jun 2024 19:12:16 GMT",
"version": "v1"
}
] | 2024-06-07 | [
[
"Mehdizadeh",
"Mohammad Reza",
""
],
[
"Ziaie",
"Amir Hadi",
""
]
] | In the context of General Relativity (GR), violation of the null energy condition (NEC) is necessary for existence of static spherically symmetric wormhole solutions. Also, it is a well-known fact that the energy conditions are violated by certain quantum fields, such as the Casimir effect. The magnitude and sign of th... |
gr-qc/0412062 | Luis Lehner | Dave Neilsen, Luis Lehner, Olivier Sarbach and Manuel Tiglio | Recent analytical and numerical techniques applied to the Einstein
equations | Contribution to appear in the Proceedings of the March-2004 Heraeus
Seminar in Bad Honnef (Eds D. Giulini, J. Frauendiener and V. Perlick) | Lect.Notes Phys. 692 (2006) 223-249 | 10.1007/11550259_11 | LSU-REL-121304 | gr-qc | null | Combining deeper insight of Einstein's equations with sophisticated numerical
techniques promises the ability to construct accurate numerical implementations
of these equations. We illustrate this in two examples, the numerical evolution
of ``bubble'' and single black hole spacetimes. The former is chosen to
demonstr... | [
{
"created": "Mon, 13 Dec 2004 21:29:14 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Neilsen",
"Dave",
""
],
[
"Lehner",
"Luis",
""
],
[
"Sarbach",
"Olivier",
""
],
[
"Tiglio",
"Manuel",
""
]
] | Combining deeper insight of Einstein's equations with sophisticated numerical techniques promises the ability to construct accurate numerical implementations of these equations. We illustrate this in two examples, the numerical evolution of ``bubble'' and single black hole spacetimes. The former is chosen to demonstrat... |
1410.3830 | Carlos O. Lousto | Carlos O. Lousto and James Healy | Flip-flopping binary black holes | 5 pages, 5 figures. To appear in Physical Review Letters | Phys. Rev. Lett. 114, 141101 (2015) | 10.1103/PhysRevLett.114.141101 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study binary spinning black holes to display the long term individual spin
dynamics. We perform a full numerical simulation starting at an initial proper
separation of $d\approx25M$ between equal mass holes and evolve them down to
merger for nearly 48 orbits, 3 precession cycles, and half of a flip-flop
cycle. The... | [
{
"created": "Tue, 14 Oct 2014 20:00:08 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Mar 2015 01:10:33 GMT",
"version": "v2"
}
] | 2015-04-16 | [
[
"Lousto",
"Carlos O.",
""
],
[
"Healy",
"James",
""
]
] | We study binary spinning black holes to display the long term individual spin dynamics. We perform a full numerical simulation starting at an initial proper separation of $d\approx25M$ between equal mass holes and evolve them down to merger for nearly 48 orbits, 3 precession cycles, and half of a flip-flop cycle. The s... |
1704.00996 | Shahram Panahiyan | S. H. Hendi, B. Eslam Panah, S. Panahiyan and M. Momennia | Three dimensional magnetic solutions in massive gravity with (non)linear
field | 16 pages, 12 figures. Matches published version | Phys. Lett. B 775, 251 (2017) | 10.1016/j.physletb.2017.10.053 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Noble Prize in physics 2016 motivates one to study different aspects of
topological properties and topological defects as their related objects.
Considering the significant role of the topological defects (especially
magnetic strings) in cosmology, here, we will investigate three dimensional
horizonless magnetic ... | [
{
"created": "Sat, 1 Apr 2017 09:16:18 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Apr 2017 05:18:26 GMT",
"version": "v2"
},
{
"created": "Mon, 13 Nov 2017 19:30:36 GMT",
"version": "v3"
}
] | 2017-11-15 | [
[
"Hendi",
"S. H.",
""
],
[
"Panah",
"B. Eslam",
""
],
[
"Panahiyan",
"S.",
""
],
[
"Momennia",
"M.",
""
]
] | The Noble Prize in physics 2016 motivates one to study different aspects of topological properties and topological defects as their related objects. Considering the significant role of the topological defects (especially magnetic strings) in cosmology, here, we will investigate three dimensional horizonless magnetic so... |
1505.02512 | Meng Sun | Meng Sun, Yong-Chang Huang | Thermodynamic fluctuation in black string flow | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has long been noticed that Laudau-Lifshitz theory can be used to study the
fluctuation of a system that contains a black hole. Since the black string can
be constructed by extending n-dimensional black hole into one extra dimension.
We study the fluctuation of black string flow with a Schwarzschlid-like metric
in ... | [
{
"created": "Mon, 11 May 2015 07:57:07 GMT",
"version": "v1"
}
] | 2015-05-12 | [
[
"Sun",
"Meng",
""
],
[
"Huang",
"Yong-Chang",
""
]
] | It has long been noticed that Laudau-Lifshitz theory can be used to study the fluctuation of a system that contains a black hole. Since the black string can be constructed by extending n-dimensional black hole into one extra dimension. We study the fluctuation of black string flow with a Schwarzschlid-like metric in D=... |
gr-qc/0108067 | Irina Radinschi | I-Ching Yang and Irina Radinschi (Department of Natural Science
Education, National Taitung Teachers College, Taitung, Taiwan, Republic of
China and Department of Physics, "Gh. Asachi" Technical University, Iasi,
Romania) | Energy associated with a static spherically symmetric nonsingular black
hole | null | Chin.J.Phys. 41 (2003) 326 | null | null | gr-qc | null | We evaluate the energy distributions of the Dymnikova space-time using the
Weinberg, Papapetrou, and M{\o}ller energy-momentum complexes. This result
sustain the importance of the energy-momentum complexes in the evaluation of
the energy distribution of a given space-time. To compare the energy
distributions obtained... | [
{
"created": "Mon, 27 Aug 2001 10:24:17 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Yang",
"I-Ching",
"",
"Department of Natural Science\n Education, National Taitung Teachers College, Taitung, Taiwan, Republic of\n China and Department of Physics, \"Gh. Asachi\" Technical University, Iasi,\n Romania"
],
[
"Radinschi",
"Irina",
"",
"Department of Natural S... | We evaluate the energy distributions of the Dymnikova space-time using the Weinberg, Papapetrou, and M{\o}ller energy-momentum complexes. This result sustain the importance of the energy-momentum complexes in the evaluation of the energy distribution of a given space-time. To compare the energy distributions obtained b... |
0705.1772 | Marek Szydlowski | Marek Szydlowski and Wlodzimierz Godlowski | Acceleration of the Universe driven by the Casimir force | RevTeX4, 17 pages, 9 figures | Int.J.Mod.Phys.D17:343-366,2008 | 10.1142/S021827180801205X | null | gr-qc | null | We investigate an evolutional scenario of the FRW universe with the Casimir
energy scaling like $(-)(1+z)^4$. The Casimir effect is used to explain the
vacuum energy differences (its value measured from astrophysics is so small
compared to value obtained from quantum field theory calculations). The
dynamics of the FR... | [
{
"created": "Sat, 12 May 2007 13:45:30 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Szydlowski",
"Marek",
""
],
[
"Godlowski",
"Wlodzimierz",
""
]
] | We investigate an evolutional scenario of the FRW universe with the Casimir energy scaling like $(-)(1+z)^4$. The Casimir effect is used to explain the vacuum energy differences (its value measured from astrophysics is so small compared to value obtained from quantum field theory calculations). The dynamics of the FRW ... |
2204.03568 | Nosratollah Jafari Sonbolabadi | Nosratollah Jafari | Precession of perihelia in the Fisher metric | 7 pages | null | null | null | gr-qc astro-ph.EP astro-ph.SR hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We study the precession of perihelia in the Fisher metric. Fisher metric is
the solution of the Einstein's Equations with a massless scalar field as a
coupling. We find an expression for the precession of perihelia in this metric.
This expression contains general relativistic term for the precession of the
perihelia ... | [
{
"created": "Wed, 6 Apr 2022 00:25:11 GMT",
"version": "v1"
}
] | 2022-04-08 | [
[
"Jafari",
"Nosratollah",
""
]
] | We study the precession of perihelia in the Fisher metric. Fisher metric is the solution of the Einstein's Equations with a massless scalar field as a coupling. We find an expression for the precession of perihelia in this metric. This expression contains general relativistic term for the precession of the perihelia an... |
gr-qc/0612047 | Gonzalo Olmo | Gonzalo J. Olmo | Limit to General Relativity in f(R) theories of gravity | 8 pages; small changes to match published version (some comments,
references added, title corrected); to appear in Phys.Rev.D | Phys.Rev.D75:023511,2007 | 10.1103/PhysRevD.75.023511 | null | gr-qc astro-ph hep-th | null | We discuss two aspects of f(R) theories of gravity in metric formalism. We
first study the reasons to introduce a scalar-tensor representation for these
theories and the behavior of this representation in the limit to General
Relativity, f(R)--> R. We find that the scalar-tensor representation is well
behaved even in... | [
{
"created": "Thu, 7 Dec 2006 20:26:53 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jan 2007 10:19:24 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Olmo",
"Gonzalo J.",
""
]
] | We discuss two aspects of f(R) theories of gravity in metric formalism. We first study the reasons to introduce a scalar-tensor representation for these theories and the behavior of this representation in the limit to General Relativity, f(R)--> R. We find that the scalar-tensor representation is well behaved even in t... |
1702.02168 | Mariya Ivanovna Trukhanova | Mariya Iv. Trukhanova and Shipov Gennady | The Geometro-Hydrodynamical Representation of the Torsion Field | null | null | 10.1016/j.physleta.2017.06.052 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct the geometro-hydrodynamical formalism for a spinning particle
based on the six-dimensional manifold of autoparallelism geometry which is
represented as a vector bundle with a base formed by the manifold of the
translational coordinates and a fibre specified at each point by the field of
an orthogonal coo... | [
{
"created": "Tue, 7 Feb 2017 19:12:22 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jun 2017 13:54:16 GMT",
"version": "v2"
}
] | 2017-08-01 | [
[
"Trukhanova",
"Mariya Iv.",
""
],
[
"Gennady",
"Shipov",
""
]
] | We construct the geometro-hydrodynamical formalism for a spinning particle based on the six-dimensional manifold of autoparallelism geometry which is represented as a vector bundle with a base formed by the manifold of the translational coordinates and a fibre specified at each point by the field of an orthogonal coord... |
1001.1875 | Klein David | David Klein and Peter Collas | Recessional velocities and Hubble's law in Schwarzschild-de Sitter space | This published version includes minor stylistic changes and
corrections to the bibliography. The paper extends the results of, and
replaces, a previous paper by the same authors entitled: "Superluminal
velocities in Schwarzschild-de Sitter space," arXiv:0910.5254v1 | Phys.Rev.D81:063518,2010 | 10.1103/PhysRevD.81.063518 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a spacetime with empty Schwarzschild-de Sitter exterior and
Schwarzschild-de Sitter interior metric for a spherical fluid with constant
density. The fluid interior may be taken to represent a galaxy supercluster,
for which the proper distance from the center of the supercluster to the
cosmological horizon... | [
{
"created": "Tue, 12 Jan 2010 13:29:35 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Feb 2010 02:53:53 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Mar 2010 15:02:34 GMT",
"version": "v3"
}
] | 2010-04-29 | [
[
"Klein",
"David",
""
],
[
"Collas",
"Peter",
""
]
] | We consider a spacetime with empty Schwarzschild-de Sitter exterior and Schwarzschild-de Sitter interior metric for a spherical fluid with constant density. The fluid interior may be taken to represent a galaxy supercluster, for which the proper distance from the center of the supercluster to the cosmological horizon h... |
2310.05332 | Wilfredo Yupanqui Carpio | Brayan Melchor, Rolando Perca and Wilfredo Yupanqui | Semiclassical resolution of the black hole singularity inspired in the
minimal uncertainty approach | The paper contains 23 pages and 7 figures | null | 10.1016/j.nuclphysb.2024.116584 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new lapse function that simplifies the Hamiltonian constraint,
describing the interior of the black hole in terms of the Ashtekar-Barbero
variables, into a more straightforward form. The new Hamiltonian leads to
different equations of motion than those found in the literature, but through a
suitable tran... | [
{
"created": "Mon, 9 Oct 2023 01:26:15 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Oct 2023 01:12:10 GMT",
"version": "v2"
},
{
"created": "Thu, 6 Jun 2024 19:48:17 GMT",
"version": "v3"
}
] | 2024-06-10 | [
[
"Melchor",
"Brayan",
""
],
[
"Perca",
"Rolando",
""
],
[
"Yupanqui",
"Wilfredo",
""
]
] | We propose a new lapse function that simplifies the Hamiltonian constraint, describing the interior of the black hole in terms of the Ashtekar-Barbero variables, into a more straightforward form. The new Hamiltonian leads to different equations of motion than those found in the literature, but through a suitable transf... |
1006.1842 | Khaled Saaidi | Kh. Saaidi, A. Aghamohammadi | Equivalence Principle (EP) and Solar System Constraints on $R(1\pm
\epsilon \ln({R \over R_c}))$ model of Gravity | 6 pages, no figure, Accepted for publication in Astrophysics & Space
Science | Astrophys. Space Sci. 333 (2011) 327 | 10.1007/s10509-011-0621-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Experiments on the violation of equivalence principle (EP) and solar system
give a number of constraints in which any modified gravity model must satisfy
them. We study these constraints on a kind of $f(R)$ gravity as $f(R) = R(1\pm
\epsilon \ln({R \over R_c}))$. For this investigation we use of chameleon
mechanism a... | [
{
"created": "Wed, 9 Jun 2010 16:11:27 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jan 2011 11:41:35 GMT",
"version": "v2"
}
] | 2014-01-20 | [
[
"Saaidi",
"Kh.",
""
],
[
"Aghamohammadi",
"A.",
""
]
] | Experiments on the violation of equivalence principle (EP) and solar system give a number of constraints in which any modified gravity model must satisfy them. We study these constraints on a kind of $f(R)$ gravity as $f(R) = R(1\pm \epsilon \ln({R \over R_c}))$. For this investigation we use of chameleon mechanism and... |
2305.06752 | Xing Zhang | Xing Zhang, Bo Wang, Rui Niu | Constraining the attractive fifth force in the general free
scalar-tensor gravity with solar system experiments | 11 pages, 2 figures, 2 tables | Eur. Phys. J. C (2024) 84:381 | 10.1140/epjc/s10052-024-12723-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we focus on the general free scalar-tensor gravity with three
free coupling functions, which in the near-field region looks like general
relativity (GR) plus a fifth force of Yukawa-type induced by the scalar field.
We show that the fifth force is always attractive in the theory. We investigate
the eff... | [
{
"created": "Thu, 11 May 2023 12:18:42 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Apr 2024 00:08:54 GMT",
"version": "v2"
}
] | 2024-04-11 | [
[
"Zhang",
"Xing",
""
],
[
"Wang",
"Bo",
""
],
[
"Niu",
"Rui",
""
]
] | In this paper, we focus on the general free scalar-tensor gravity with three free coupling functions, which in the near-field region looks like general relativity (GR) plus a fifth force of Yukawa-type induced by the scalar field. We show that the fifth force is always attractive in the theory. We investigate the effec... |
1504.02545 | Rana X. Adhikari | Huan Yang, Larry R. Price, Nicolas D. Smith, Rana X Adhikari, Haixing
Miao, Yanbei Chen | Towards the Laboratory Search for Space-Time Dissipation | 18 pages, 8 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been speculated that gravity could be an emergent phenomenon, with
classical general relativity as an effective, macroscopic theory, valid only
for classical systems at large temporal and spatial scales. As in classical
continuum dynamics, the existence of underlying microscopic degrees of freedom
may lead to ... | [
{
"created": "Fri, 10 Apr 2015 03:55:34 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jun 2015 06:14:15 GMT",
"version": "v2"
}
] | 2015-06-24 | [
[
"Yang",
"Huan",
""
],
[
"Price",
"Larry R.",
""
],
[
"Smith",
"Nicolas D.",
""
],
[
"Adhikari",
"Rana X",
""
],
[
"Miao",
"Haixing",
""
],
[
"Chen",
"Yanbei",
""
]
] | It has been speculated that gravity could be an emergent phenomenon, with classical general relativity as an effective, macroscopic theory, valid only for classical systems at large temporal and spatial scales. As in classical continuum dynamics, the existence of underlying microscopic degrees of freedom may lead to ma... |
2209.00589 | Juliano Neves | Juliano C. S. Neves | Kasner cosmology in bumblebee gravity | 7 pages. Published in Annals of Physics | Ann. Phys. 454, 169338 (2023) | 10.1016/j.aop.2023.169338 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Kasner cosmology is a vacuum and anisotropically expanding spacetime in the
general relativity context. In this work, such a cosmological model is studied
in another context, the bumblebee model, where the Lorentz symmetry is
spontaneously broken. By using the bumblebee context it is possible to justify
the anisotrop... | [
{
"created": "Thu, 1 Sep 2022 17:03:17 GMT",
"version": "v1"
},
{
"created": "Wed, 10 May 2023 15:00:54 GMT",
"version": "v2"
}
] | 2023-05-11 | [
[
"Neves",
"Juliano C. S.",
""
]
] | Kasner cosmology is a vacuum and anisotropically expanding spacetime in the general relativity context. In this work, such a cosmological model is studied in another context, the bumblebee model, where the Lorentz symmetry is spontaneously broken. By using the bumblebee context it is possible to justify the anisotropic... |
2205.06878 | Vasil Todorinov | Vasil Todorinov, Saurya Das, and Pasquale Bosso | Effective field theory from Relativistic Generalized Uncertainty | Sixteenth Marcel Grossmann Meeting - MG16 2021, 19 pages, 2 tables | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Theories of Quantum Gravity predict a minimum measurable length and a
corresponding modification of the Heisenberg Uncertainty Principle to the
so-called Generalized Uncertainty Principle (GUP). However, this modification
is usually formulated in non-relativistic language, making it unclear whether
the minimum length... | [
{
"created": "Fri, 13 May 2022 20:23:08 GMT",
"version": "v1"
}
] | 2022-05-17 | [
[
"Todorinov",
"Vasil",
""
],
[
"Das",
"Saurya",
""
],
[
"Bosso",
"Pasquale",
""
]
] | Theories of Quantum Gravity predict a minimum measurable length and a corresponding modification of the Heisenberg Uncertainty Principle to the so-called Generalized Uncertainty Principle (GUP). However, this modification is usually formulated in non-relativistic language, making it unclear whether the minimum length i... |
1508.02642 | Pavel Krtous | Pavel Krtous, David Kubiznak, Ivan Kolar | Killing-Yano forms and Killing tensors on a warped space | 10 pages, no figures | Phys. Rev. D 93, 024057 (2016) | 10.1103/PhysRevD.93.024057 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We formulate several criteria under which the symmetries associated with the
Killing and Killing-Yano tensors on the base space can be lifted to the
symmetries of the full warped geometry. The procedure is explicitly illustrated
on several examples, providing new prototypes of spacetimes admitting such
tensors. In pa... | [
{
"created": "Tue, 11 Aug 2015 16:09:24 GMT",
"version": "v1"
}
] | 2016-02-03 | [
[
"Krtous",
"Pavel",
""
],
[
"Kubiznak",
"David",
""
],
[
"Kolar",
"Ivan",
""
]
] | We formulate several criteria under which the symmetries associated with the Killing and Killing-Yano tensors on the base space can be lifted to the symmetries of the full warped geometry. The procedure is explicitly illustrated on several examples, providing new prototypes of spacetimes admitting such tensors. In part... |
1710.08765 | Wu-Sheng Dai | Wen-Du Li, Shi-Lin Li, Yu-Jie Chen, Yu-Zhu Chen, and Wu-Sheng Dai | Gravitational wave scattering theory without large-distance asymptotics | null | Annals of Physics 427 (2021) 168424 | 10.1016/j.aop.2021.168424 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In conventional gravitational wave scattering theory, a large-distance
asymptotic approximation is employed. In this approximation, the gravitational
wave is approximated by its large-distance asymptotics. In this paper, we
establish a gravitational wave scattering theory without the large-distance
asymptotic approxi... | [
{
"created": "Tue, 24 Oct 2017 13:37:42 GMT",
"version": "v1"
},
{
"created": "Sat, 27 Feb 2021 13:35:28 GMT",
"version": "v2"
}
] | 2021-03-02 | [
[
"Li",
"Wen-Du",
""
],
[
"Li",
"Shi-Lin",
""
],
[
"Chen",
"Yu-Jie",
""
],
[
"Chen",
"Yu-Zhu",
""
],
[
"Dai",
"Wu-Sheng",
""
]
] | In conventional gravitational wave scattering theory, a large-distance asymptotic approximation is employed. In this approximation, the gravitational wave is approximated by its large-distance asymptotics. In this paper, we establish a gravitational wave scattering theory without the large-distance asymptotic approxima... |
1402.2748 | Parthapratim Pradhan | Parthapratim Pradhan | Regular Black Holes as Particle Accelerators | 30 pages, 18 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the possibility of arbitrarily high energy in the center of
mass(CM) frame of colliding particles in the vicinity of the infinite red-shift
surface of the spherically symmetric, static charged regular black holes
(Bardeen black hole, Ay\'{o}n-Beato and Garc\'{i}a black hole, and Hayward
black hole). We... | [
{
"created": "Wed, 12 Feb 2014 07:31:46 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Feb 2014 14:10:25 GMT",
"version": "v2"
},
{
"created": "Fri, 10 Oct 2014 21:12:06 GMT",
"version": "v3"
}
] | 2014-10-14 | [
[
"Pradhan",
"Parthapratim",
""
]
] | We investigate the possibility of arbitrarily high energy in the center of mass(CM) frame of colliding particles in the vicinity of the infinite red-shift surface of the spherically symmetric, static charged regular black holes (Bardeen black hole, Ay\'{o}n-Beato and Garc\'{i}a black hole, and Hayward black hole). We s... |
2207.14286 | Benjamin Steltner | Benjamin Steltner, Thorben Menne, Maria Alessandra Papa, Heinz-Bernd
Eggenstein | Density-clustering of continuous gravitational wave candidates from
large surveys | 7 pages, 3 figures | null | 10.1103/PhysRevD.106.104063 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Searches for continuous gravitational waves target nearly monochromatic
gravitational wave emission from e.g. non-axysmmetric fast-spinning neutron
stars. Broad surveys often require to explicitly search for a very large number
of different waveforms, easily exceeding $\sim10^{17}$ templates. In such
cases, for pract... | [
{
"created": "Thu, 28 Jul 2022 17:59:30 GMT",
"version": "v1"
}
] | 2022-12-14 | [
[
"Steltner",
"Benjamin",
""
],
[
"Menne",
"Thorben",
""
],
[
"Papa",
"Maria Alessandra",
""
],
[
"Eggenstein",
"Heinz-Bernd",
""
]
] | Searches for continuous gravitational waves target nearly monochromatic gravitational wave emission from e.g. non-axysmmetric fast-spinning neutron stars. Broad surveys often require to explicitly search for a very large number of different waveforms, easily exceeding $\sim10^{17}$ templates. In such cases, for practic... |
1301.6794 | Marco Astorino | Marco Astorino | Embedding hairy black holes in a magnetic universe | 17 pages, V2: final version, to appear in Phys. Rev. D | Phys. Rev. D 87, 084029 (2013) | 10.1103/PhysRevD.87.084029 | CECS-PHY-13/01 | gr-qc hep-th nlin.SI | http://creativecommons.org/licenses/by-nc-sa/3.0/ | Ernst's solution generating technique is adapted to Einstein-Maxwell theory
conformally (and minimally) coupled to a scalar field. This integrable system
enjoys a SU(2,1) symmetry which enables one to move, by Kinnersley
transformations, though the axisymmetric and stationary solution space,
building an infinite towe... | [
{
"created": "Mon, 28 Jan 2013 22:11:51 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Mar 2013 16:58:05 GMT",
"version": "v2"
}
] | 2013-04-24 | [
[
"Astorino",
"Marco",
""
]
] | Ernst's solution generating technique is adapted to Einstein-Maxwell theory conformally (and minimally) coupled to a scalar field. This integrable system enjoys a SU(2,1) symmetry which enables one to move, by Kinnersley transformations, though the axisymmetric and stationary solution space, building an infinite tower ... |
2310.08253 | Christopher Straub | Christopher Straub and Sebastian Wolfschmidt | EVStabilityNet: Predicting the Stability of Star Clusters in General
Relativity | 16 pages, 4 figures | Class. Quantum Grav. (2024) | 10.1088/1361-6382/ad228a | null | gr-qc astro-ph.GA math-ph math.MP | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We present a deep neural network which predicts the stability of isotropic
steady states of the asymptotically flat, spherically symmetric Einstein-Vlasov
system in Schwarzschild coordinates. The network takes as input the energy
profile and the redshift of the steady state. Its architecture consists of a
U-Net with ... | [
{
"created": "Thu, 12 Oct 2023 11:56:02 GMT",
"version": "v1"
}
] | 2024-01-29 | [
[
"Straub",
"Christopher",
""
],
[
"Wolfschmidt",
"Sebastian",
""
]
] | We present a deep neural network which predicts the stability of isotropic steady states of the asymptotically flat, spherically symmetric Einstein-Vlasov system in Schwarzschild coordinates. The network takes as input the energy profile and the redshift of the steady state. Its architecture consists of a U-Net with a ... |
0909.2867 | P Ajith | P. Ajith, M. Hannam, S. Husa, Y. Chen, B. Bruegmann, N. Dorband, D.
Mueller, F. Ohme, D. Pollney, C. Reisswig, L. Santamaria, J. Seiler | Inspiral-merger-ringdown waveforms for black-hole binaries with
non-precessing spins | To appear in Phys. Rev. Lett. Significant new results. One figure
removed due to page limitation | Phys.Rev.Lett.106:241101,2011 | 10.1103/PhysRevLett.106.241101 | LIGO-P0900085-v5 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first analytical inspiral-merger-ringdown gravitational
waveforms from binary black holes (BBHs) with non-precessing spins, that is
based on a description of the late-inspiral, merger and ringdown in full
general relativity. By matching a post-Newtonian description of the inspiral to
a set of numerical... | [
{
"created": "Tue, 15 Sep 2009 20:15:41 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Sep 2010 22:31:34 GMT",
"version": "v2"
},
{
"created": "Wed, 8 Jun 2011 20:13:06 GMT",
"version": "v3"
}
] | 2011-06-27 | [
[
"Ajith",
"P.",
""
],
[
"Hannam",
"M.",
""
],
[
"Husa",
"S.",
""
],
[
"Chen",
"Y.",
""
],
[
"Bruegmann",
"B.",
""
],
[
"Dorband",
"N.",
""
],
[
"Mueller",
"D.",
""
],
[
"Ohme",
"F.",
""
],
... | We present the first analytical inspiral-merger-ringdown gravitational waveforms from binary black holes (BBHs) with non-precessing spins, that is based on a description of the late-inspiral, merger and ringdown in full general relativity. By matching a post-Newtonian description of the inspiral to a set of numerical-r... |
0709.4610 | Marco Valerio Battisti | Marco Valerio Battisti and Giovanni Montani | Minisuperspace dynamics in a generalized uncertainty principle framework | 8 pages, 4 figures; to appear in the proceedings of the 4th
Italian-Sino Workshop on Relativistic Astrophysics, AIP Conference Series | AIPConf.Proc.966:219-226,2008 | 10.1063/1.2836998 | null | gr-qc hep-th | null | The minisuperspace dynamics of the Friedmann-Robertson-Walker (FRW) and of
the Taub Universes in the context of a Generalized Uncertainty Principle is
analyzed in detail. In particular, the motion of the wave packets is
investigated and, in both the models, the classical singularity appear to be
probabilistic suppres... | [
{
"created": "Fri, 28 Sep 2007 13:56:41 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Oct 2007 09:15:59 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Battisti",
"Marco Valerio",
""
],
[
"Montani",
"Giovanni",
""
]
] | The minisuperspace dynamics of the Friedmann-Robertson-Walker (FRW) and of the Taub Universes in the context of a Generalized Uncertainty Principle is analyzed in detail. In particular, the motion of the wave packets is investigated and, in both the models, the classical singularity appear to be probabilistic suppresse... |
1806.08062 | Ryouta Matsuyama | Ryouta Matsuyama and Michiyasu Nagasawa | Gravity in Extreme Regions Based on Noncommutative Quantization of
Teleparallel Gravity | 28 pages, 2 figures | Class. Quantum Grav. 35 (2018) 155010 | 10.1088/1361-6382/aacddc | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, a noncommutative gravitational theory is constructed by
applying Moyal deformation quantization and the Seiberg-Witten map to
teleparallel gravity, a classical gravitational theory, as a gauge theory of
local translational symmetry. Since our model is based on teleparallel gravity,
it is an extremely s... | [
{
"created": "Thu, 21 Jun 2018 04:34:28 GMT",
"version": "v1"
}
] | 2018-07-20 | [
[
"Matsuyama",
"Ryouta",
""
],
[
"Nagasawa",
"Michiyasu",
""
]
] | In this paper, a noncommutative gravitational theory is constructed by applying Moyal deformation quantization and the Seiberg-Witten map to teleparallel gravity, a classical gravitational theory, as a gauge theory of local translational symmetry. Since our model is based on teleparallel gravity, it is an extremely sim... |
1610.05662 | Hyerim Noh | Jai-chan Hwang and Hyerim Noh | Special relativistic hydrodynamics with gravitation | 15 pages, no figure. Accepted in ApJ | null | 10.3847/1538-4357/833/2/180 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The special relativistic hydrodynamics with weak gravity is hitherto unknown
in the literature. Whether such an asymmetric combination is possible was
unclear. Here, the hydrodynamic equations with Poisson-type gravity considering
fully relativistic velocity and pressure under the weak gravity and the
action-at-a-dis... | [
{
"created": "Mon, 17 Oct 2016 06:46:16 GMT",
"version": "v1"
}
] | 2016-12-21 | [
[
"Hwang",
"Jai-chan",
""
],
[
"Noh",
"Hyerim",
""
]
] | The special relativistic hydrodynamics with weak gravity is hitherto unknown in the literature. Whether such an asymmetric combination is possible was unclear. Here, the hydrodynamic equations with Poisson-type gravity considering fully relativistic velocity and pressure under the weak gravity and the action-at-a-dista... |
2211.00991 | Beyhan Pulice | Durmus Demir, Beyhan Pulice | Geometric Proca with Matter in Metric-Palatini Gravity | 11 pages, 6 figures. v2: Added references | Eur. Phys. J. C 82, 996 (2022) | 10.1140/epjc/s10052-022-10986-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work, we study linear, torsion-free metric-Palatini gravity,
extended by the quadratics of the antisymmetric part of the Ricci tensor and
extended also by the presence of the affine connection in the matter sector. We
show that this extended metric-Palatini gravity reduces dynamically to the
general re... | [
{
"created": "Wed, 2 Nov 2022 09:52:47 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jan 2023 12:10:52 GMT",
"version": "v2"
}
] | 2023-01-25 | [
[
"Demir",
"Durmus",
""
],
[
"Pulice",
"Beyhan",
""
]
] | In the present work, we study linear, torsion-free metric-Palatini gravity, extended by the quadratics of the antisymmetric part of the Ricci tensor and extended also by the presence of the affine connection in the matter sector. We show that this extended metric-Palatini gravity reduces dynamically to the general rela... |
2012.09305 | Antonio Ferreiro | Antonio Ferreiro | Instantaneous vacuum for Dirac fields with a Yukawa interaction in
cosmological space-times | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We propose a suitable vacuum state for a quantized Dirac field interacting
with a classical scalar field in a Friedman-Robertson-Walker-Lemaitre
spacetime. This state is constructed from an extended version of the adiabatic
expansion of the associated Fourier modes of the field. We compute the full
renormalized stres... | [
{
"created": "Wed, 16 Dec 2020 22:50:55 GMT",
"version": "v1"
}
] | 2020-12-18 | [
[
"Ferreiro",
"Antonio",
""
]
] | We propose a suitable vacuum state for a quantized Dirac field interacting with a classical scalar field in a Friedman-Robertson-Walker-Lemaitre spacetime. This state is constructed from an extended version of the adiabatic expansion of the associated Fourier modes of the field. We compute the full renormalized stress-... |
1511.00611 | Antonio Pasqua Dr. | Antonio Pasqua, Surajit Chattopadhyay, Ratbay Myrzakulov | Power-Law Entropy-Corrected Holographic Dark Energy in
Ho\v{r}ava-Lifshitz Cosmology with Granda-Oliveros Cut-off | More information added; Figures inserted | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the Power Law Entropy Corrected Holographic Dark
Energy (PLECHDE) model in the framework of a non-flat Universe and of
Ho\v{r}ava-Lifshitz cosmology with infrared cut-off given by recently proposed
Granda-Oliveros cut-off, which contains one term proportional to the Hubble
parameter squared $H... | [
{
"created": "Mon, 26 Oct 2015 07:28:23 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Mar 2016 15:02:19 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Mar 2016 18:07:46 GMT",
"version": "v3"
}
] | 2016-03-25 | [
[
"Pasqua",
"Antonio",
""
],
[
"Chattopadhyay",
"Surajit",
""
],
[
"Myrzakulov",
"Ratbay",
""
]
] | In this paper, we study the Power Law Entropy Corrected Holographic Dark Energy (PLECHDE) model in the framework of a non-flat Universe and of Ho\v{r}ava-Lifshitz cosmology with infrared cut-off given by recently proposed Granda-Oliveros cut-off, which contains one term proportional to the Hubble parameter squared $H^2... |
gr-qc/0409122 | Edward Anderson | E. Anderson | The Campbell--Magaard Theorem is inadequate and inappropriate as a
protective theorem for relativistic field equations | 23 pages including 8 figures. This update has improved clarity and a
couple of new references | null | null | null | gr-qc | null | Given a particular prescription for the Einstein field equations (EFE's), it
is important to have general protective theorems that lend support to it. The
prescription of data on a timelike hypersurface for the (n + 1)-d EFE's arises
in `noncompact Kaluza--Klein theory', and in certain kinds of braneworlds and
low-en... | [
{
"created": "Thu, 30 Sep 2004 19:45:23 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Dec 2004 20:30:17 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Anderson",
"E.",
""
]
] | Given a particular prescription for the Einstein field equations (EFE's), it is important to have general protective theorems that lend support to it. The prescription of data on a timelike hypersurface for the (n + 1)-d EFE's arises in `noncompact Kaluza--Klein theory', and in certain kinds of braneworlds and low-ener... |
1707.05162 | Muhammad Sharif | M. Sharif and Ayesha Ikram | Existence of Static Wormholes in $f(\mathcal{G},T)$ Gravity | 23 pages, 11 figures | Int. J. Mod. Phys. D 27(2018)1750182 | 10.1142/S0218271817501826 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper investigates static spherically symmetric traversable wormhole
solutions in $f(\mathcal{G},T)$ gravity ($\mathcal{G}$ and $T$ represent the
Gauss-Bonnet invariant and trace of the energy-momentum tensor, respectively).
We construct explicit expressions for ordinary matter by taking specific form
of red-shi... | [
{
"created": "Fri, 14 Jul 2017 03:41:00 GMT",
"version": "v1"
}
] | 2018-01-10 | [
[
"Sharif",
"M.",
""
],
[
"Ikram",
"Ayesha",
""
]
] | This paper investigates static spherically symmetric traversable wormhole solutions in $f(\mathcal{G},T)$ gravity ($\mathcal{G}$ and $T$ represent the Gauss-Bonnet invariant and trace of the energy-momentum tensor, respectively). We construct explicit expressions for ordinary matter by taking specific form of red-shift... |
1007.4077 | Christian Corda cordac | Christian Corda | Massive relic gravitational waves from f(R) theories of gravity:
production and potential detection | Published by The European Physical Journal C | Eur.Phys.J.C65:257-267,2010 | 10.1140/epjc/s10052-009-1100-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The production of a stochastic background of relic gravitational waves is
well known in various works in the literature, where, by using the so called
adiabatically-amplified zero-point fluctuations process, it has been shown how
the standard inflationary scenario for the early universe can in principle
provide a dis... | [
{
"created": "Fri, 23 Jul 2010 09:12:26 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Corda",
"Christian",
""
]
] | The production of a stochastic background of relic gravitational waves is well known in various works in the literature, where, by using the so called adiabatically-amplified zero-point fluctuations process, it has been shown how the standard inflationary scenario for the early universe can in principle provide a disti... |
2102.13489 | Jitendra Kumar Dr. | Jitendra Kumar, Puja Bharti | Pulsar PSR B0943+10 as an isotropic Vaidya-Tikekar type compact star : A
comprehensive study | NA | null | 10.1007/s12043-022-02400-4 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have constructed a model for well behaved isotropic compact
star in the presence of charged perfect fluid, by considering a static and
spherically symmetric metric in Schwarzschild's canonical coordinate system. To
put the resulting differential equations into a closed system, we have employed
the V... | [
{
"created": "Thu, 25 Feb 2021 09:19:25 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Sep 2021 13:05:23 GMT",
"version": "v2"
}
] | 2022-09-07 | [
[
"Kumar",
"Jitendra",
""
],
[
"Bharti",
"Puja",
""
]
] | In this paper, we have constructed a model for well behaved isotropic compact star in the presence of charged perfect fluid, by considering a static and spherically symmetric metric in Schwarzschild's canonical coordinate system. To put the resulting differential equations into a closed system, we have employed the Vai... |
1904.04843 | Manus R. Visser | Ted Jacobson, Manus R. Visser | Spacetime Equilibrium at Negative Temperature and the Attraction of
Gravity | 7 pages, Essay written for the Gravity Research Foundation 2019
Awards for Essays on Gravitation | null | 10.1142/S0218271819440164 | null | gr-qc hep-th | http://creativecommons.org/publicdomain/zero/1.0/ | We derive the Einstein equation from the condition that every small causal
diamond is a variation of a flat empty diamond with the same free conformal
energy, as would be expected for a near-equilibrium state. The attractiveness
of gravity hinges on the negativity of the absolute temperature of these
diamonds, a prop... | [
{
"created": "Tue, 9 Apr 2019 18:00:06 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jun 2019 19:50:16 GMT",
"version": "v2"
}
] | 2019-11-26 | [
[
"Jacobson",
"Ted",
""
],
[
"Visser",
"Manus R.",
""
]
] | We derive the Einstein equation from the condition that every small causal diamond is a variation of a flat empty diamond with the same free conformal energy, as would be expected for a near-equilibrium state. The attractiveness of gravity hinges on the negativity of the absolute temperature of these diamonds, a proper... |
1109.5753 | O-Kab Kwon | Inyong Cho, O-Kab Kwon | Scalar Perturbation in Symmetric Lee-Wick Bouncing Universe | 21 pages, 6 figures, references are added | null | 10.1088/1475-7516/2011/11/043 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the scalar perturbation in the Lee-Wick bouncing universe
driven by an ordinary scalar field plus a ghost field. We consider only a
symmetric evolution of the universe and the scalar fields about the bouncing
point. The gauge invariant Sasaki-Mukhanov variable is numerically solved in
the spatially fla... | [
{
"created": "Tue, 27 Sep 2011 00:27:33 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Oct 2011 15:10:09 GMT",
"version": "v2"
}
] | 2015-05-30 | [
[
"Cho",
"Inyong",
""
],
[
"Kwon",
"O-Kab",
""
]
] | We investigate the scalar perturbation in the Lee-Wick bouncing universe driven by an ordinary scalar field plus a ghost field. We consider only a symmetric evolution of the universe and the scalar fields about the bouncing point. The gauge invariant Sasaki-Mukhanov variable is numerically solved in the spatially flat ... |
2402.07068 | Cetin Senturk | Metin Gurses, Cetin Senturk, Bayram Tekin | Minimal Einstein-Aether Theory | 5 pages, no figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that there is a minimal Einstein-Aether theory, obtained as a
phenomenologically and theoretically consistent limit from the generic
Einstein-Aether theory, that supports Einstein metrics as solutions with a
reduced cosmological constant. The minimal theory is obtained by taking three
of the coupling constant... | [
{
"created": "Sat, 10 Feb 2024 23:51:04 GMT",
"version": "v1"
}
] | 2024-02-13 | [
[
"Gurses",
"Metin",
""
],
[
"Senturk",
"Cetin",
""
],
[
"Tekin",
"Bayram",
""
]
] | We show that there is a minimal Einstein-Aether theory, obtained as a phenomenologically and theoretically consistent limit from the generic Einstein-Aether theory, that supports Einstein metrics as solutions with a reduced cosmological constant. The minimal theory is obtained by taking three of the coupling constants ... |
2110.14379 | Semin Xavier | Semin Xavier (IITB), Alan Sunny (CUTN), and S. Shankaranarayanan
(IITB) | An exact model for evaporating primordial black holes in cosmological
space-time | V2: 11 pages,2 figures, added 2 appendices, accepted in PRD | null | 10.1103/PhysRevD.105.104038 | null | gr-qc astro-ph.CO hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Primordial black holes (PBHs) in the mass range $10^{17} - 10^{23}~{\rm gm}$
are considered as possible dark matter candidates as they are not subject to
big-bang nucleosynthesis constraints and behave like cold dark matter. If PBHs
are indeed dark matter, they cannot be treated as isolated objects in
asymptotic flat... | [
{
"created": "Wed, 27 Oct 2021 12:27:12 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Apr 2022 17:39:34 GMT",
"version": "v2"
}
] | 2022-06-01 | [
[
"Xavier",
"Semin",
"",
"IITB"
],
[
"Sunny",
"Alan",
"",
"CUTN"
],
[
"Shankaranarayanan",
"S.",
"",
"IITB"
]
] | Primordial black holes (PBHs) in the mass range $10^{17} - 10^{23}~{\rm gm}$ are considered as possible dark matter candidates as they are not subject to big-bang nucleosynthesis constraints and behave like cold dark matter. If PBHs are indeed dark matter, they cannot be treated as isolated objects in asymptotic flat s... |
1507.04161 | Paul Klinger | Paul Klinger | A New Class of Asymptotically Non-Chaotic Vacuum Singularities | MSc Thesis, 42 pages; v2: appendix on cosmological constant added,
typos corrected; v3: typos corrected | Annals of Physics 363 (2015) 1-35 | 10.1016/j.aop.2015.09.010 | UWThPh-2015-17 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The BKL conjecture, stated in the 60s and early 70s by Belinski, Khalatnikov
and Lifshitz, proposes a detailed description of the generic asymptotic
dynamics of spacetimes as they approach a spacelike singularity. It predicts
complicated chaotic behaviour in the generic case, but simpler non-chaotic one
in cases with... | [
{
"created": "Wed, 15 Jul 2015 10:46:44 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Nov 2015 16:18:51 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Dec 2015 16:55:33 GMT",
"version": "v3"
}
] | 2015-12-11 | [
[
"Klinger",
"Paul",
""
]
] | The BKL conjecture, stated in the 60s and early 70s by Belinski, Khalatnikov and Lifshitz, proposes a detailed description of the generic asymptotic dynamics of spacetimes as they approach a spacelike singularity. It predicts complicated chaotic behaviour in the generic case, but simpler non-chaotic one in cases with s... |
1606.03423 | Marc Casals | Marc Casals and Adrian C. Ottewill | Spin-1 Quasi-normal Frequencies in Schwarzschild space-time for Large
Overtone Number | 10 pages, 2 figures. In this version we give more details of the
calculation and correct some typographical errors of the previous version | Phys. Rev. D 97, 024048 (2018) | 10.1103/PhysRevD.97.024048 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analytically investigate the spin-1 quasinormal mode frequencies of
Schwarzschild black hole space-time. We formally determine these frequencies to
arbitrary order as an expansion for large imaginary part (i.e., large-n, where
n is the overtone number). As an example of the practicality of this formal
procedure, w... | [
{
"created": "Fri, 10 Jun 2016 18:47:54 GMT",
"version": "v1"
},
{
"created": "Sat, 27 May 2017 13:48:35 GMT",
"version": "v2"
}
] | 2018-02-07 | [
[
"Casals",
"Marc",
""
],
[
"Ottewill",
"Adrian C.",
""
]
] | We analytically investigate the spin-1 quasinormal mode frequencies of Schwarzschild black hole space-time. We formally determine these frequencies to arbitrary order as an expansion for large imaginary part (i.e., large-n, where n is the overtone number). As an example of the practicality of this formal procedure, we ... |
1612.04414 | Jorge Bellor\'in | Jorge Bellorin and Alvaro Restuccia | Einstein's quadrupole formula from the kinetic-conformal Horava theory | v2: 26 pages, one section added. Changes in presentation and more
references added. Title changed | International Journal of Modern Physics D 26 (2017) 1750174 | 10.1142/S0218271817501747 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the radiative and nonradiative linearized variables in a gravity
theory within the familiy of the nonprojectable Horava theories, the Horava
theory at the kinetic-conformal point. There is no extra mode in this
formulation, the theory shares the same number of degrees of freedom with
general relativity. Th... | [
{
"created": "Tue, 13 Dec 2016 21:57:36 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Jul 2017 16:24:54 GMT",
"version": "v2"
}
] | 2017-10-27 | [
[
"Bellorin",
"Jorge",
""
],
[
"Restuccia",
"Alvaro",
""
]
] | We analyze the radiative and nonradiative linearized variables in a gravity theory within the familiy of the nonprojectable Horava theories, the Horava theory at the kinetic-conformal point. There is no extra mode in this formulation, the theory shares the same number of degrees of freedom with general relativity. The ... |
1004.1964 | Eric Chassande-Mottin | Eric Chassande-Mottin, Martin Hendry, Patrick J. Sutton and Szabolcs
M\'arka | Multimessenger astronomy with the Einstein Telescope | 26 pages. 3 figures. Special issue of GRG on the Einstein Telescope.
Minor corrections included | Gen.Rel.Grav.43:437-464,2011 | 10.1007/s10714-010-1019-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves (GWs) are expected to play a crucial role in the
development of multimessenger astrophysics. The combination of GW observations
with other astrophysical triggers, such as from gamma-ray and X-ray satellites,
optical/radio telescopes, and neutrino detectors allows us to decipher science
that would ... | [
{
"created": "Mon, 12 Apr 2010 14:07:27 GMT",
"version": "v1"
},
{
"created": "Tue, 11 May 2010 19:38:45 GMT",
"version": "v2"
}
] | 2011-01-28 | [
[
"Chassande-Mottin",
"Eric",
""
],
[
"Hendry",
"Martin",
""
],
[
"Sutton",
"Patrick J.",
""
],
[
"Márka",
"Szabolcs",
""
]
] | Gravitational waves (GWs) are expected to play a crucial role in the development of multimessenger astrophysics. The combination of GW observations with other astrophysical triggers, such as from gamma-ray and X-ray satellites, optical/radio telescopes, and neutrino detectors allows us to decipher science that would ot... |
1506.02648 | Ginestra Bianconi | Ginestra Bianconi and Christoph Rahmede | Complex Quantum Network Manifolds in Dimension $d>2$ are Scale-Free | (29 pages, 4 figures) | Scientific Reports 5, 13979 (2015) | 10.1038/srep13979 | KA-TP-12-2015 | gr-qc cond-mat.dis-nn cond-mat.stat-mech physics.soc-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In quantum gravity, several approaches have been proposed until now for the
quantum description of discrete geometries. These theoretical frameworks
include loop quantum gravity, causal dynamical triangulations, causal sets,
quantum graphity, and energetic spin networks. Most of these approaches
describe discrete spa... | [
{
"created": "Mon, 8 Jun 2015 09:36:55 GMT",
"version": "v1"
}
] | 2015-09-14 | [
[
"Bianconi",
"Ginestra",
""
],
[
"Rahmede",
"Christoph",
""
]
] | In quantum gravity, several approaches have been proposed until now for the quantum description of discrete geometries. These theoretical frameworks include loop quantum gravity, causal dynamical triangulations, causal sets, quantum graphity, and energetic spin networks. Most of these approaches describe discrete space... |
0807.3292 | Pablo Laguna | James Healy, Frank Herrmann, Ian Hinder, Deirdre M. Shoemaker, Pablo
Laguna, Richard A. Matzner | Superkicks in Hyperbolic Encounters of Binary Black Holes | 4 pages, 5 figures, 1 table | Phys.Rev.Lett.102:041101,2009 | 10.1103/PhysRevLett.102.041101 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Generic inspirals and mergers of binary black holes produce beamed emission
of gravitational radiation that can lead to a gravitational recoil or kick of
the final black hole. The kick velocity depends on the mass ratio and spins of
the binary as well as on the dynamics of the binary configuration. Studies have
focus... | [
{
"created": "Mon, 21 Jul 2008 16:11:13 GMT",
"version": "v1"
}
] | 2009-02-23 | [
[
"Healy",
"James",
""
],
[
"Herrmann",
"Frank",
""
],
[
"Hinder",
"Ian",
""
],
[
"Shoemaker",
"Deirdre M.",
""
],
[
"Laguna",
"Pablo",
""
],
[
"Matzner",
"Richard A.",
""
]
] | Generic inspirals and mergers of binary black holes produce beamed emission of gravitational radiation that can lead to a gravitational recoil or kick of the final black hole. The kick velocity depends on the mass ratio and spins of the binary as well as on the dynamics of the binary configuration. Studies have focused... |
2105.02731 | Tayyaba Naz | Tayyaba Naz, Ammara Usman, M. Farasat Shamir | Embedded Class-I Solution of Compact Stars in $f(R)$ Gravity with
Karmarkar Condition | Published in Annals of Physics | Annals of Physics 429 (2021) 168491 | 10.1016/j.aop.2021.168491 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | This paper's main aim is to investigate the existence of a new classification
of embedded class-I solutions of compact stars, by using Karmarkar condition in
$f(R)$ gravity background. To achieve that goal, we consider two different
models of the $f(R)$ theory of gravity for the static spherically symmetric
spacetime... | [
{
"created": "Thu, 6 May 2021 14:49:31 GMT",
"version": "v1"
}
] | 2021-05-07 | [
[
"Naz",
"Tayyaba",
""
],
[
"Usman",
"Ammara",
""
],
[
"Shamir",
"M. Farasat",
""
]
] | This paper's main aim is to investigate the existence of a new classification of embedded class-I solutions of compact stars, by using Karmarkar condition in $f(R)$ gravity background. To achieve that goal, we consider two different models of the $f(R)$ theory of gravity for the static spherically symmetric spacetime b... |
gr-qc/9706080 | Jose Socorro Garcia Diaz | Alfredo Mac\'ias, Eckehard W. Mielke and Jos\'e Socorro | Supersymmetric quantum cosmology for Bianchi class A models | 10 pages, Revtex | Int.J.Mod.Phys.D7:701-712,1998 | 10.1142/S0218271898000462 | IFUG-97-05 | gr-qc | null | The canonical theory of (N=1) supergravity, with a matrix representation for
the gravitino covector-spinor, is applied to the Bianchi class A spatially
homogeneous cosmologies. The full Lorentz constraint and its implications for
the wave function of the universe are analyzed in detail. We found that in this
model no... | [
{
"created": "Thu, 26 Jun 1997 16:19:48 GMT",
"version": "v1"
}
] | 2016-08-15 | [
[
"Macías",
"Alfredo",
""
],
[
"Mielke",
"Eckehard W.",
""
],
[
"Socorro",
"José",
""
]
] | The canonical theory of (N=1) supergravity, with a matrix representation for the gravitino covector-spinor, is applied to the Bianchi class A spatially homogeneous cosmologies. The full Lorentz constraint and its implications for the wave function of the universe are analyzed in detail. We found that in this model no p... |
1710.09125 | Yusuf Sucu | Ganim Gecim and Yusuf Sucu | Quantum Gravity Effect on the Tunneling Particles from 2+1 dimensional
New-type Black Hole | 11 pages | Adv. High Energy Phys. (2018) 8728564 | 10.1155/2018/8728564 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the Generalized Uncertainty Principle (GUP) effect on the
Hawking temperature for the 2+1 dimensional New-type black hole by using the
quantum tunneling method for both the spin-1/2 Dirac and the spin-0 scalar
particles. In computation of the GUP correction for the Hawking temperature of
the black hole... | [
{
"created": "Wed, 25 Oct 2017 08:55:27 GMT",
"version": "v1"
}
] | 2018-09-27 | [
[
"Gecim",
"Ganim",
""
],
[
"Sucu",
"Yusuf",
""
]
] | We investigate the Generalized Uncertainty Principle (GUP) effect on the Hawking temperature for the 2+1 dimensional New-type black hole by using the quantum tunneling method for both the spin-1/2 Dirac and the spin-0 scalar particles. In computation of the GUP correction for the Hawking temperature of the black hole, ... |
0707.1181 | Subenoy Chakraborty | Subenoy Chakraborty and Tanwi Bandyopadhyay | Wormhole and its Analogue in Brane World | 4 pages | Astrophys.SpaceSci.317:209-212,2008 | 10.1007/s10509-008-9875-7 | null | gr-qc | null | In Einstein gravity, for an inhomogeneous phantom energy distribution having
linear equation of state (but anisotropic), there exists simple exact solution
for spherically symmetric space time describing a wormhole. At infinity, the
space time is not asymptotically flat and possesses a regular cosmological
Killing ho... | [
{
"created": "Mon, 9 Jul 2007 05:57:59 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Chakraborty",
"Subenoy",
""
],
[
"Bandyopadhyay",
"Tanwi",
""
]
] | In Einstein gravity, for an inhomogeneous phantom energy distribution having linear equation of state (but anisotropic), there exists simple exact solution for spherically symmetric space time describing a wormhole. At infinity, the space time is not asymptotically flat and possesses a regular cosmological Killing hori... |
2305.01469 | Venkatesha Venkatesha | N. S. Kavya, V. Venkatesha, G. Mustafa, P.K. Sahoo, S. V. Divya Rashmi | Static traversable wormhole solutions in $f(R,L_m)$ gravity | Chinese Journal of Physics accepted version | Chinese Journal of Physics (2023) | 10.1016/j.cjph.2023.05.002 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | In this study, we explore the new wormhole solutions in the framework of new
modified $f(R,L_m)$ gravity. To obtain a characteristic wormhole solution, we
use anisotropic matter distribution and a specific form of energy density. As
second adopt the isotropic case with a linear EoS relation as a general
technique for... | [
{
"created": "Tue, 2 May 2023 14:51:27 GMT",
"version": "v1"
}
] | 2023-05-12 | [
[
"Kavya",
"N. S.",
""
],
[
"Venkatesha",
"V.",
""
],
[
"Mustafa",
"G.",
""
],
[
"Sahoo",
"P. K.",
""
],
[
"Rashmi",
"S. V. Divya",
""
]
] | In this study, we explore the new wormhole solutions in the framework of new modified $f(R,L_m)$ gravity. To obtain a characteristic wormhole solution, we use anisotropic matter distribution and a specific form of energy density. As second adopt the isotropic case with a linear EoS relation as a general technique for t... |
2111.07223 | Xin Zhang | Qi-Ming Fu, Xin Zhang | Gravitational lensing by a black hole in effective loop quantum gravity | 14 pages, 6 figures; accepted for publication in Physical Review D | null | 10.1103/PhysRevD.105.064020 | null | gr-qc hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | It is well known that general relativity is an effective theory of gravity at
low energy scale, and actually quantum effects cannot be ignored in the
strong-field regime. As a strong gravitational object, black hole plays a key
role in testing the quantum effects of gravity in the strong-field regime. In
this paper, ... | [
{
"created": "Sun, 14 Nov 2021 02:25:41 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Feb 2022 03:16:08 GMT",
"version": "v2"
}
] | 2022-03-23 | [
[
"Fu",
"Qi-Ming",
""
],
[
"Zhang",
"Xin",
""
]
] | It is well known that general relativity is an effective theory of gravity at low energy scale, and actually quantum effects cannot be ignored in the strong-field regime. As a strong gravitational object, black hole plays a key role in testing the quantum effects of gravity in the strong-field regime. In this paper, we... |
1010.3986 | William Nelson | William Nelson | Static Solutions for 4th order gravity | 19 pages, minor changes to match published version | Phys.Rev.D82:104026,2010 | 10.1103/PhysRevD.82.104026 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Lichnerowicz and Israel theorems are extended to higher order theories of
gravity. In particular it is shown that Schwarzschild is the unique spherically
symmetric, static, asymptotically flat, black-hole solution, provided the
spatial curvature is less than the quantum gravity scale outside the horizon.
It is th... | [
{
"created": "Tue, 19 Oct 2010 17:29:39 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Nov 2010 20:15:50 GMT",
"version": "v2"
}
] | 2010-12-28 | [
[
"Nelson",
"William",
""
]
] | The Lichnerowicz and Israel theorems are extended to higher order theories of gravity. In particular it is shown that Schwarzschild is the unique spherically symmetric, static, asymptotically flat, black-hole solution, provided the spatial curvature is less than the quantum gravity scale outside the horizon. It is then... |
0905.4792 | Takeshi Fukuyama | Takeshi Fukuyama | Comments on the Tetrad (Vielbeins) | 8 pages, no Figure | Mod.Phys.Lett.A24:2459-2466,2009 | 10.1142/S0217732309031739 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We want to correct the misunderstandings on the tetrad (or veilbeins in
general) appeared in many text books or review articles. The tetrad should be
defined without any condition. $e_{\mu a}=\partial_\mu X_a$ with local Lorentz
coordinates $X_a$ ia wrong in many sences: it gives the condition $\partial_\mu
e_{\nu a}... | [
{
"created": "Fri, 29 May 2009 06:40:24 GMT",
"version": "v1"
}
] | 2010-02-02 | [
[
"Fukuyama",
"Takeshi",
""
]
] | We want to correct the misunderstandings on the tetrad (or veilbeins in general) appeared in many text books or review articles. The tetrad should be defined without any condition. $e_{\mu a}=\partial_\mu X_a$ with local Lorentz coordinates $X_a$ ia wrong in many sences: it gives the condition $\partial_\mu e_{\nu a}=\... |
1505.07888 | Erwan Allys | Erwan Allys | Bosonic condensates in realistic supersymmetric GUT cosmic strings | 18 pages, 0 figures. Discussion clarified and simplified. Matches
version published in JCAP | JCAP04(2016)009 | 10.1088/1475-7516/2016/04/009 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the realistic structure of F-term Nambu-Goto cosmic strings forming
in a general supersymmetric Grand Unified Theory implementation, assuming
standard hybrid inflation. Examining the symmetry breaking of the unification
gauge group down to the Standard Model, we discuss the minimal field content
necessary to... | [
{
"created": "Thu, 28 May 2015 23:47:28 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Dec 2015 13:44:23 GMT",
"version": "v2"
},
{
"created": "Fri, 8 Apr 2016 07:55:51 GMT",
"version": "v3"
}
] | 2016-04-26 | [
[
"Allys",
"Erwan",
""
]
] | We study the realistic structure of F-term Nambu-Goto cosmic strings forming in a general supersymmetric Grand Unified Theory implementation, assuming standard hybrid inflation. Examining the symmetry breaking of the unification gauge group down to the Standard Model, we discuss the minimal field content necessary to d... |
2105.03451 | Rodrigo Panosso Macedo | Jos\'e Luis Jaramillo, Rodrigo Panosso Macedo, Lamis Al Sheikh | Gravitational wave signatures of black hole quasi-normal mode
instability | 4 pages, 3 figures, 1 table + Supplemental Material (3 additional
figures) | null | 10.1103/PhysRevLett.128.211102 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole (BH) spectroscopy has emerged as a powerful approach to extract
spacetime information from gravitational wave (GW) observed signals. Yet,
quasinormal mode (QNM) spectral instability under high wave-number
perturbations has been recently shown to be a common classical general
relativistic phenomenon [1]. Th... | [
{
"created": "Fri, 7 May 2021 18:02:59 GMT",
"version": "v1"
},
{
"created": "Fri, 14 May 2021 16:46:02 GMT",
"version": "v2"
},
{
"created": "Tue, 14 Sep 2021 16:38:13 GMT",
"version": "v3"
}
] | 2022-06-08 | [
[
"Jaramillo",
"José Luis",
""
],
[
"Macedo",
"Rodrigo Panosso",
""
],
[
"Sheikh",
"Lamis Al",
""
]
] | Black hole (BH) spectroscopy has emerged as a powerful approach to extract spacetime information from gravitational wave (GW) observed signals. Yet, quasinormal mode (QNM) spectral instability under high wave-number perturbations has been recently shown to be a common classical general relativistic phenomenon [1]. This... |
1111.0092 | Takeshi Chiba | Takeshi Chiba | The Constancy of the Constants of Nature: Updates | 27 pages, 2 figures, to be published in Prog.Theor.Phys, ref. added | Prog. Theor. Phys. 126 (2011), 993-1019 | 10.1143/PTP.126.993 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The current observational and experimental bounds on the time variation of
the constants of nature (the fine structure constant $\alpha$, the
gravitational constant $G$ and the proton-electron mass ratio $\mu=m_p/m_e$)
are reviewed.
| [
{
"created": "Tue, 1 Nov 2011 00:24:13 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Nov 2011 06:41:50 GMT",
"version": "v2"
},
{
"created": "Tue, 15 Nov 2011 02:15:26 GMT",
"version": "v3"
},
{
"created": "Fri, 23 Dec 2011 02:19:43 GMT",
"version": "v4"
}
] | 2012-01-03 | [
[
"Chiba",
"Takeshi",
""
]
] | The current observational and experimental bounds on the time variation of the constants of nature (the fine structure constant $\alpha$, the gravitational constant $G$ and the proton-electron mass ratio $\mu=m_p/m_e$) are reviewed. |
2310.10447 | Lijing Shao | Hua-Peng Gu, Hai-Tian Wang, Lijing Shao | Constraints on charged black holes from merger-ringdown signals in
GWTC-3 and prospects for the Einstein Telescope | 13 pages, 7 figures; accepted by PRD | Phys. Rev. D 109 (2024) 024058 | 10.1103/PhysRevD.109.024058 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Whether astrophysical black holes (BHs) can have charge is a question to be
addressed by observations. In the era of gravitational wave (GW) astronomy, one
can constrain the charge of a merged BH remnant using the merger-ringdown
signal of the GW data. Extending earlier studies, we analyze five GW events in
GWTC-3, a... | [
{
"created": "Mon, 16 Oct 2023 14:31:13 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jan 2024 19:53:57 GMT",
"version": "v2"
}
] | 2024-01-31 | [
[
"Gu",
"Hua-Peng",
""
],
[
"Wang",
"Hai-Tian",
""
],
[
"Shao",
"Lijing",
""
]
] | Whether astrophysical black holes (BHs) can have charge is a question to be addressed by observations. In the era of gravitational wave (GW) astronomy, one can constrain the charge of a merged BH remnant using the merger-ringdown signal of the GW data. Extending earlier studies, we analyze five GW events in GWTC-3, ass... |
gr-qc/0510103 | Roberto Casadio | R. Casadio, F. Finelli, M. Luzzi, G. Venturi | Improved WKB analysis of Slow-Roll Inflation | REVTeX 4, 13 pages, no figures, final version to appear in Phys. Rev.
D | Phys.Rev. D72 (2005) 103516 | 10.1103/PhysRevD.72.103516 | null | gr-qc astro-ph hep-th | null | We extend the WKB method for the computation of cosmological perturbations
during inflation beyond leading order and provide the power spectra of scalar
and tensor perturbations to second order in the slow-roll parameters. Our
method does not require that the slow-roll parameters be constant. Although
leading and nex... | [
{
"created": "Mon, 24 Oct 2005 09:21:43 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Nov 2005 09:32:08 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Casadio",
"R.",
""
],
[
"Finelli",
"F.",
""
],
[
"Luzzi",
"M.",
""
],
[
"Venturi",
"G.",
""
]
] | We extend the WKB method for the computation of cosmological perturbations during inflation beyond leading order and provide the power spectra of scalar and tensor perturbations to second order in the slow-roll parameters. Our method does not require that the slow-roll parameters be constant. Although leading and next-... |
gr-qc/0508066 | Christoph Schmid | Christoph Schmid (ETH Zurich) | Cosmological gravitomagnetism and Mach's principle | 18 pages, 1 figure. Comments and references added | Phys.Rev. D74 (2006) 044031 | 10.1103/PhysRevD.74.044031 | null | gr-qc astro-ph | null | The spin axes of gyroscopes experimentally define local non-rotating frames.
But what physical cause governs the time-evolution of gyroscope axes? We
consider linear perturbations of Friedmann-Robertson-Walker cosmologies with
k=0. We ask: Will cosmological vorticity perturbations exactly drag the spin
axes of gyrosc... | [
{
"created": "Tue, 16 Aug 2005 15:34:25 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Sep 2006 12:41:56 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Schmid",
"Christoph",
"",
"ETH Zurich"
]
] | The spin axes of gyroscopes experimentally define local non-rotating frames. But what physical cause governs the time-evolution of gyroscope axes? We consider linear perturbations of Friedmann-Robertson-Walker cosmologies with k=0. We ask: Will cosmological vorticity perturbations exactly drag the spin axes of gyroscop... |
1901.03758 | Jafar Sadeghi | J. Sadeghi, M. R. Alipour | Klein Gordon particle near R-N black hole, generalized sl(2) algebra and
harmonic oscillator energy | 12 pages. arXiv admin note: text overlap with arXiv:1001.0785 by
other authors | null | 10.1142/S0217751X19501963 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider Klein Gordon particle near Reissner-Nordstr\"{o}m
black hole. The symmetry of such background lead us to compare the
corresponding Laplace equation with the generalized Heun functions. Such
relation help us achieve the generalized $sl(2)$ algebra and some suitable
results for describing the... | [
{
"created": "Wed, 9 Jan 2019 07:47:07 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Sadeghi",
"J.",
""
],
[
"Alipour",
"M. R.",
""
]
] | In this paper, we consider Klein Gordon particle near Reissner-Nordstr\"{o}m black hole. The symmetry of such background lead us to compare the corresponding Laplace equation with the generalized Heun functions. Such relation help us achieve the generalized $sl(2)$ algebra and some suitable results for describing the a... |
1508.05864 | Macarena Lagos | Macarena Lagos and Johannes Noller | New massive bigravity cosmologies with double matter coupling | Last version includes minor changes to text and references | JCAP01(2016)023 | 10.1088/1475-7516/2016/01/023 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a previously largely unexplored branch of homogeneous and isotropic
background solutions in ghost-free massive bigravity with consistent double
matter coupling. For a certain family of parameters we find `self-inflated'
FLRW cosmologies, i.e. solutions with an accelerated early-time period during
the radiati... | [
{
"created": "Fri, 21 Aug 2015 19:26:34 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jan 2016 17:18:30 GMT",
"version": "v2"
}
] | 2016-01-15 | [
[
"Lagos",
"Macarena",
""
],
[
"Noller",
"Johannes",
""
]
] | We study a previously largely unexplored branch of homogeneous and isotropic background solutions in ghost-free massive bigravity with consistent double matter coupling. For a certain family of parameters we find `self-inflated' FLRW cosmologies, i.e. solutions with an accelerated early-time period during the radiation... |
1909.08692 | Yousef Bisabr | Yousef Bisabr (Farzan-Nahad) | Redshift Dependence of CMB Temperature in BSBM $\alpha$-Varying Theories | To appear in EuroPhysics Letters | EPL 134, 49002 (2021) | 10.1209/0295-5075/134/49002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have investigated some cosmological consequences of variation of the fine
structure constant, $\alpha$, in the context of the
Bekenstein-Sandvik-Barrow-Magueijo (BSBM) model. In this context, such a
variation is attributed to electric charge by letting the latter take on the
value of a real scalar field, $\phi$, w... | [
{
"created": "Tue, 17 Sep 2019 06:53:27 GMT",
"version": "v1"
},
{
"created": "Mon, 24 May 2021 13:42:06 GMT",
"version": "v2"
}
] | 2021-08-10 | [
[
"Bisabr",
"Yousef",
"",
"Farzan-Nahad"
]
] | We have investigated some cosmological consequences of variation of the fine structure constant, $\alpha$, in the context of the Bekenstein-Sandvik-Barrow-Magueijo (BSBM) model. In this context, such a variation is attributed to electric charge by letting the latter take on the value of a real scalar field, $\phi$, whi... |
1409.3163 | Luis O. Pimentel | J. Socorro, Luis O. Pimentel and Abraham Espinoza-Garc\'ia | Classical Bianchi type I cosmology in K-essence theory | 15 pages with one figure, accepted in Advances in High Energy Physics | null | null | UAMIFIS-14-31 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use one of the simplest forms of the K-essence theory and we apply it to
the classical anisotropic Bianchi type I cosmological model, with a barotropic
perfect fluid modeling the usual matter content and with cosmological constant.
The classical solutions for any but the stiff fluid and without cosmological
consta... | [
{
"created": "Wed, 10 Sep 2014 17:55:33 GMT",
"version": "v1"
}
] | 2014-09-11 | [
[
"Socorro",
"J.",
""
],
[
"Pimentel",
"Luis O.",
""
],
[
"Espinoza-García",
"Abraham",
""
]
] | We use one of the simplest forms of the K-essence theory and we apply it to the classical anisotropic Bianchi type I cosmological model, with a barotropic perfect fluid modeling the usual matter content and with cosmological constant. The classical solutions for any but the stiff fluid and without cosmological constant... |
1909.06433 | Muhammad Zubair | G. Abbas, Asif Mahmood, M. Zubair | Strong Gravitational Lensing for Photon Coupled to Weyl Tensor in
Kiselev Black Hole | 26 pages, 10 figures, major revision included and accepted for
publications in Chinese Physics C. arXiv admin note: text overlap with
arXiv:1611.08783, arXiv:1502.01088 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The ambition of the present work is to highlight the phenomena of strong
gravitational lensing and deflection angle for the photons coupling with Weyl
tensor in a Kiselev black hole. Here, we have extended the prior work of Chen
and Jing \cite{1} for Schwarzschild black hole to Kiselev black hole. For this
purpose, t... | [
{
"created": "Tue, 6 Aug 2019 11:44:37 GMT",
"version": "v1"
},
{
"created": "Mon, 11 May 2020 07:15:32 GMT",
"version": "v2"
}
] | 2020-05-12 | [
[
"Abbas",
"G.",
""
],
[
"Mahmood",
"Asif",
""
],
[
"Zubair",
"M.",
""
]
] | The ambition of the present work is to highlight the phenomena of strong gravitational lensing and deflection angle for the photons coupling with Weyl tensor in a Kiselev black hole. Here, we have extended the prior work of Chen and Jing \cite{1} for Schwarzschild black hole to Kiselev black hole. For this purpose, the... |
gr-qc/0505085 | Chad Galley | Chad R. Galley and B. L. Hu | Self-Force with a Stochastic Component from Radiation Reaction of a
Scalar Charge Moving in Curved Spacetime | One appendix added, minor revisions, 20 pages, 2 figures; submitted
to PRD | Phys.Rev. D72 (2005) 084023 | 10.1103/PhysRevD.72.084023 | null | gr-qc hep-th | null | We give a quantum field theoretical derivation of the scalar
Abraham-Lorentz-Dirac (ALD) equation and the self-force for a scalar charged
particle interacting with a quantum scalar field in curved spacetime. We
regularize the causal Green's function using a quasi-local expansion in the
spirit of effective field theor... | [
{
"created": "Tue, 17 May 2005 21:06:41 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Jul 2005 19:11:37 GMT",
"version": "v2"
}
] | 2013-05-29 | [
[
"Galley",
"Chad R.",
""
],
[
"Hu",
"B. L.",
""
]
] | We give a quantum field theoretical derivation of the scalar Abraham-Lorentz-Dirac (ALD) equation and the self-force for a scalar charged particle interacting with a quantum scalar field in curved spacetime. We regularize the causal Green's function using a quasi-local expansion in the spirit of effective field theory ... |
gr-qc/9405026 | Martin B. Einhorn | A. D. Dolgov, M. B. Einhorn, and V. I. Zakharov | The Vacuum of de~Sitter Space | 31 pages, no figures, UM-TH-94-14. (Compile twice with LaTeX.)
Amended 5/13/94 to add a citation | Acta Phys.Polon. B26 (1995) 65-90 | null | null | gr-qc hep-th | null | To resolve infrared problems with the de~Sitter invariant vacuum, we argue
that the history of the de~Sitter phase is crucial. We illustrate how either
(1)~the diagonalization of the Hamiltonian for long-wavelength modes or (2)~an
explicit modification of the metric in the distant past leads to natural
infrared cutof... | [
{
"created": "Tue, 10 May 1994 21:30:12 GMT",
"version": "v1"
},
{
"created": "Fri, 13 May 1994 22:41:00 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Dolgov",
"A. D.",
""
],
[
"Einhorn",
"M. B.",
""
],
[
"Zakharov",
"V. I.",
""
]
] | To resolve infrared problems with the de~Sitter invariant vacuum, we argue that the history of the de~Sitter phase is crucial. We illustrate how either (1)~the diagonalization of the Hamiltonian for long-wavelength modes or (2)~an explicit modification of the metric in the distant past leads to natural infrared cutoffs... |
gr-qc/9704080 | Mikhail Yu. Zotov | Mikhail Zotov (NPI, Moscow State University) | Einstein-Yang-Mills Black Hole Interiors: Serious Problems But Simple
Solution | REVTeX, 3 pages including 5 eps figures, uses boxedeps.tex. Minor
style changes, a typo in eqs. (6) removed | null | null | null | gr-qc | null | Recently E. E. Donets, D. V. Galtsov, and the author reported the results of
numerical and analytical investigation of the SU(2) Einstein-Yang-Mills black
hole interior solutions (gr-qc/9612067). It was shown that a generic interior
solution develops a new type of an infinitely oscillating behavior with
exponentially... | [
{
"created": "Tue, 29 Apr 1997 07:43:28 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Jun 1997 08:45:03 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Zotov",
"Mikhail",
"",
"NPI, Moscow State University"
]
] | Recently E. E. Donets, D. V. Galtsov, and the author reported the results of numerical and analytical investigation of the SU(2) Einstein-Yang-Mills black hole interior solutions (gr-qc/9612067). It was shown that a generic interior solution develops a new type of an infinitely oscillating behavior with exponentially g... |
1410.0802 | Christodoulakis Theodosios | Petros A. Terzis, N. Dimakis, T. Christodoulakis | Noether analysis of Scalar-Tensor Cosmology | Latex 2e source file, 26 pages, 2 figures | null | 10.1103/PhysRevD.90.123543 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A scalar--tensor theory of gravity, containing an arbitrary coupling function
$F(\phi)$ and a general potential $V(\phi)$, is considered in the context of a
spatially flat FLRW model. The use of reparametrization invariance enables a
particular lapse parametrization in which the mini--superspace metric
completely spe... | [
{
"created": "Fri, 3 Oct 2014 10:02:07 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Terzis",
"Petros A.",
""
],
[
"Dimakis",
"N.",
""
],
[
"Christodoulakis",
"T.",
""
]
] | A scalar--tensor theory of gravity, containing an arbitrary coupling function $F(\phi)$ and a general potential $V(\phi)$, is considered in the context of a spatially flat FLRW model. The use of reparametrization invariance enables a particular lapse parametrization in which the mini--superspace metric completely speci... |
1006.2126 | Giacomo Rosati | Giovanni Amelino-Camelia, Marco Matassa, Flavio Mercati, Giacomo
Rosati | Taming nonlocality in theories with Planck-scale-deformed Lorentz
symmetry | results generalized to 3+1D case; presentation streamlined | Phys.Rev.Lett.106:071301,2011 | 10.1103/PhysRevLett.106.071301 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report a general analysis of worldlines for theories with deformed
relativistic symmetries and momentum dependence of the speed of photons. Our
formalization is faithful to Einstein's program, with spacetime points viewed
as an abstraction of physical events. The emerging picture imposes the
renunciation of the id... | [
{
"created": "Thu, 10 Jun 2010 19:43:14 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Jun 2010 21:38:45 GMT",
"version": "v2"
},
{
"created": "Fri, 17 Feb 2012 09:42:12 GMT",
"version": "v3"
}
] | 2012-02-20 | [
[
"Amelino-Camelia",
"Giovanni",
""
],
[
"Matassa",
"Marco",
""
],
[
"Mercati",
"Flavio",
""
],
[
"Rosati",
"Giacomo",
""
]
] | We report a general analysis of worldlines for theories with deformed relativistic symmetries and momentum dependence of the speed of photons. Our formalization is faithful to Einstein's program, with spacetime points viewed as an abstraction of physical events. The emerging picture imposes the renunciation of the idea... |
2009.06669 | Ricard Aguilera-Miret | Ricard Aguilera-Miret, Daniele Vigan\`o, Federico Carrasco, Borja
Mi\~nano, Carlos Palenzuela | Turbulent magnetic-field amplification in the first 10 milliseconds
after a binary neutron star merger: comparing high-resolution and large eddy
simulations | 14 pages, 7 figures | Phys. Rev. D 102, 103006 (2020) | 10.1103/PhysRevD.102.103006 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of binary neutron star mergers represents one of the most
important and complex astrophysical discoveries of the recent years. One of the
unclear aspects of the problem is the turbulent magnetic field amplification,
initially triggered by the Kelvin-Helmholtz instability at much smaller scales
than any ... | [
{
"created": "Mon, 14 Sep 2020 18:10:36 GMT",
"version": "v1"
}
] | 2020-11-11 | [
[
"Aguilera-Miret",
"Ricard",
""
],
[
"Viganò",
"Daniele",
""
],
[
"Carrasco",
"Federico",
""
],
[
"Miñano",
"Borja",
""
],
[
"Palenzuela",
"Carlos",
""
]
] | The detection of binary neutron star mergers represents one of the most important and complex astrophysical discoveries of the recent years. One of the unclear aspects of the problem is the turbulent magnetic field amplification, initially triggered by the Kelvin-Helmholtz instability at much smaller scales than any re... |
gr-qc/9807084 | Phlogiston | Eric Baird | GR without SR: A gravitational-domain description of first-order Doppler
effects | HTML+GIF, with three GIF equations and three GIF figures, 58 refs.
~6500-word discussion of a radical approach to merging classical and quantum
models | null | null | null | gr-qc | null | Equivalence principles are a major part of modern relativity theory.
Gravitational shifts can already be calculated within the time domain as motion
shifts, and we examine the consequences of reversing this argument and
describing motion shifts outside the time domain, as effects of curvature
associated with relative... | [
{
"created": "Thu, 30 Jul 1998 21:44:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Baird",
"Eric",
""
]
] | Equivalence principles are a major part of modern relativity theory. Gravitational shifts can already be calculated within the time domain as motion shifts, and we examine the consequences of reversing this argument and describing motion shifts outside the time domain, as effects of curvature associated with relative v... |
gr-qc/0207056 | Paul Halpern | Paul Halpern | The Mixmaster Universe in Five Dimensions | 13 pages | Gen.Rel.Grav. 35 (2003) 251-261 | 10.1023/A:1022341026460 | null | gr-qc | null | We consider a five dimensional vacuum cosmology with Bianchi type-IX spatial
geometry and an extra non-compact coordinate. Finding a new class of solutions,
we examine and rule out the possibility of deterministic chaos. We interpret
this result within the context of induced matter theory.
| [
{
"created": "Mon, 15 Jul 2002 21:20:50 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Halpern",
"Paul",
""
]
] | We consider a five dimensional vacuum cosmology with Bianchi type-IX spatial geometry and an extra non-compact coordinate. Finding a new class of solutions, we examine and rule out the possibility of deterministic chaos. We interpret this result within the context of induced matter theory. |
2404.07888 | Yiran Liu | Yi-Ran Liu, Jing-Rui Zhang, Yun-Long Zhang | Slowly rotating charges from Weyl double copy for Kerr black hole with
Chern-Simons correction | 9 pages | Commun. Theor. Phys. (2024) | 10.1088/1572-9494/ad4a37 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Weyl double copy builds the relation between gauge theory and gravity
theory, especially the correspondence between gauge solutions and gravity
solutions. In this paper, we obtain the slowly rotating charge solutions from
Weyl double copy for the Kerr black hole with small Chern-Simons correction.
Based on the We... | [
{
"created": "Thu, 11 Apr 2024 16:18:01 GMT",
"version": "v1"
}
] | 2024-05-21 | [
[
"Liu",
"Yi-Ran",
""
],
[
"Zhang",
"Jing-Rui",
""
],
[
"Zhang",
"Yun-Long",
""
]
] | The Weyl double copy builds the relation between gauge theory and gravity theory, especially the correspondence between gauge solutions and gravity solutions. In this paper, we obtain the slowly rotating charge solutions from Weyl double copy for the Kerr black hole with small Chern-Simons correction. Based on the Weyl... |
gr-qc/0403033 | Mihalis Dafermos | Mihalis Dafermos | On naked singularities and the collapse of self-gravitating Higgs fields | 15 pages, 4 figures | Adv.Theor.Math.Phys. 9 (2005) 575-591 | null | null | gr-qc | null | We consider the problem of collapse of a self-gravitating Higgs field, with
potential bounded below by a (possibly negative) constant. The behaviour at
infinity may be either asymptotically flat or asymptotically AdS. This problem
has received much attention as a source for possible violations of weak cosmic
censorsh... | [
{
"created": "Mon, 8 Mar 2004 18:00:21 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Nov 2004 15:05:35 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Dafermos",
"Mihalis",
""
]
] | We consider the problem of collapse of a self-gravitating Higgs field, with potential bounded below by a (possibly negative) constant. The behaviour at infinity may be either asymptotically flat or asymptotically AdS. This problem has received much attention as a source for possible violations of weak cosmic censorship... |
2401.03098 | Tyler McMaken | Tyler McMaken, Andrew J. S. Hamilton | Hawking radiation inside a rotating black hole | 29 pages, 12 figures, 2 appendices | Phys. Rev. D 109, 065023 (2024) | 10.1103/PhysRevD.109.065023 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In semiclassical gravity, the vacuum expectation value
${\langle\hat{N}\rangle}$ of the particle number operator for a quantum field
gives rise to the perception of thermal radiation in the vicinity of a black
hole. This Hawking effect has been examined only for observers asymptotically
far from a Kerr black hole; he... | [
{
"created": "Sat, 6 Jan 2024 00:07:47 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Mar 2024 18:21:59 GMT",
"version": "v2"
}
] | 2024-03-22 | [
[
"McMaken",
"Tyler",
""
],
[
"Hamilton",
"Andrew J. S.",
""
]
] | In semiclassical gravity, the vacuum expectation value ${\langle\hat{N}\rangle}$ of the particle number operator for a quantum field gives rise to the perception of thermal radiation in the vicinity of a black hole. This Hawking effect has been examined only for observers asymptotically far from a Kerr black hole; here... |
2301.00053 | Oleg Tsupko | Gennady S. Bisnovatyi-Kogan and Oleg Yu. Tsupko | Time delay induced by plasma in strong lens systems | 8 pages, 1 figure | null | 10.1093/mnras/stad2030 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | If the gravitational lens is surrounded by non-homoheneous plasma, in
addition to the vacuum gravitational deflection, chromatic refraction occurs.
Also, the speed of signal propagation decreases compared to vacuum. In this
article, we investigate analytically the time delay in the case of
gravitational lensing in pl... | [
{
"created": "Fri, 30 Dec 2022 20:42:19 GMT",
"version": "v1"
}
] | 2023-07-12 | [
[
"Bisnovatyi-Kogan",
"Gennady S.",
""
],
[
"Tsupko",
"Oleg Yu.",
""
]
] | If the gravitational lens is surrounded by non-homoheneous plasma, in addition to the vacuum gravitational deflection, chromatic refraction occurs. Also, the speed of signal propagation decreases compared to vacuum. In this article, we investigate analytically the time delay in the case of gravitational lensing in plas... |
1403.6915 | Hideyuki Tagoshi | Hideyuki Tagoshi, Chandra Kant Mishra, Archana Pai, K. G. Arun | Parameter estimation of neutron star-black hole binaries using an
advanced gravitational-wave detector network: Effects of the full
post-Newtonian waveform | 29 pages, 25 figures, version published in PRD | Phys. Rev. D 90, 024053 (2014) | 10.1103/PhysRevD.90.024053 | LIGO-P1400030, OUTAP-353 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the effects of using the {\it full} waveform (FWF) over the
conventional {\it restricted} waveform (RWF) of the inspiral signal from a
coalescing compact binary (CCB) system in extracting the parameters of the
source, using a global network of second generation interferometric detectors.
We study a hyp... | [
{
"created": "Thu, 27 Mar 2014 04:57:49 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Dec 2014 02:31:13 GMT",
"version": "v2"
}
] | 2014-12-15 | [
[
"Tagoshi",
"Hideyuki",
""
],
[
"Mishra",
"Chandra Kant",
""
],
[
"Pai",
"Archana",
""
],
[
"Arun",
"K. G.",
""
]
] | We investigate the effects of using the {\it full} waveform (FWF) over the conventional {\it restricted} waveform (RWF) of the inspiral signal from a coalescing compact binary (CCB) system in extracting the parameters of the source, using a global network of second generation interferometric detectors. We study a hypot... |
1910.06105 | Muhammad Sharif | M. Sharif and Amal Majid | Complexity Factor for Static Sphere in Self-interacting Brans-Dicke
Gravity | 18 pages, no figure | Chin. J. Phys. 61(2019)38-46 | 10.1016/j.cjph.2019.08.004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the complexity factor of a static anisotropic sphere
in the context of self-interacting Brans-Dicke theory. We split the Riemann
tensor using Bel's approach to obtain structure scalars relating to comoving
congruence and Tolman mass in the presence of a scalar field. We then define
the complex... | [
{
"created": "Fri, 11 Oct 2019 03:39:23 GMT",
"version": "v1"
}
] | 2019-10-23 | [
[
"Sharif",
"M.",
""
],
[
"Majid",
"Amal",
""
]
] | In this paper, we study the complexity factor of a static anisotropic sphere in the context of self-interacting Brans-Dicke theory. We split the Riemann tensor using Bel's approach to obtain structure scalars relating to comoving congruence and Tolman mass in the presence of a scalar field. We then define the complexit... |
gr-qc/0602058 | Gianluca Gemme | R. Ballantini, M. Bassan, A. Chincarini, G. Gemme, R. Parodi and R.
Vaccarone | Superconducting cavity transducer for resonant gravitational radiation
antennas | 7 pages, 3 eps figures. Presented at the 6th Amaldi Conference on
Gravitational Waves (2005). Accepted for publication in Journal of Physics:
Conference Series | J.Phys.Conf.Ser. 32 (2006) 339-345 | 10.1088/1742-6596/32/1/052 | null | gr-qc | null | Parametric transducers, such as superconducting rf cavities, can boost the
bandwidth and sensitivity of the next generation resonant antennas, thanks to a
readily available technology. We have developed a fully coupled dynamic model
of the system "antenna--transducer" and worked out some estimates of
signal--to--nois... | [
{
"created": "Wed, 15 Feb 2006 10:22:54 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Ballantini",
"R.",
""
],
[
"Bassan",
"M.",
""
],
[
"Chincarini",
"A.",
""
],
[
"Gemme",
"G.",
""
],
[
"Parodi",
"R.",
""
],
[
"Vaccarone",
"R.",
""
]
] | Parametric transducers, such as superconducting rf cavities, can boost the bandwidth and sensitivity of the next generation resonant antennas, thanks to a readily available technology. We have developed a fully coupled dynamic model of the system "antenna--transducer" and worked out some estimates of signal--to--noise ... |
1401.7093 | Vladimir Folomeev | Vladimir Dzhunushaliev, Vladimir Folomeev, Burkhard Kleihaus, Jutta
Kunz | Hiding a neutron star inside a wormhole | 17 pages, 7 figures, minor corrections to content, new references
added, version published in PRD. arXiv admin note: text overlap with
arXiv:1302.5217 | Phys. Rev. D 89, 084018 (2014) | 10.1103/PhysRevD.89.084018 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider neutron-star-plus-wormhole configurations supported by a massless
ghost scalar field. The neutron fluid is modeled by an anisotropic equation of
state. When the central energy density of the fluid is of comparable magnitude
to the one of the scalar field, configurations with an equator at the center
and a... | [
{
"created": "Tue, 28 Jan 2014 06:29:31 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Apr 2014 04:51:15 GMT",
"version": "v2"
}
] | 2014-04-15 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
]
] | We consider neutron-star-plus-wormhole configurations supported by a massless ghost scalar field. The neutron fluid is modeled by an anisotropic equation of state. When the central energy density of the fluid is of comparable magnitude to the one of the scalar field, configurations with an equator at the center and a d... |
1601.07382 | Vladimi Toussaint | Jorma Louko and Vladimir Toussaint | Unruh-DeWitt Fermion Detector on a (1+1)-Dimensional Cylindrical
Spacetime: Arbitrary Worldlines and Inequivalent Spin Structures | null | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine an Unruh-DeWitt particle detector which couples linearly to the
scalar density of a massless Dirac field on the static cylindrical quotient of
the (1+1)-dimensional Minkowski spacetime, allowing the detector's motion to
remain arbitrary and working to leading order in perturbation theory. We show
that the ... | [
{
"created": "Tue, 26 Jan 2016 16:20:58 GMT",
"version": "v1"
}
] | 2016-01-28 | [
[
"Louko",
"Jorma",
""
],
[
"Toussaint",
"Vladimir",
""
]
] | We examine an Unruh-DeWitt particle detector which couples linearly to the scalar density of a massless Dirac field on the static cylindrical quotient of the (1+1)-dimensional Minkowski spacetime, allowing the detector's motion to remain arbitrary and working to leading order in perturbation theory. We show that the de... |
gr-qc/0303034 | Teofilo Vargas | T. Vargas Auccalla | The energy of the universe in teleparallel gravity | 9 pages, no figures | Gen.Rel.Grav. 36 (2004) 1255 | 10.1023/B:GERG.0000022386.29438.be | null | gr-qc | null | The teleparallel versions of the Einstein and the Landau-Lifshitz
energy-momentum complexes of the gravitational field are obtained. By using
these complexes, the total energy of the universe, which includes the energy of
both the matter and the gravitational fields, is then obtained. It is shown
that the total energ... | [
{
"created": "Sun, 9 Mar 2003 22:48:36 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Auccalla",
"T. Vargas",
""
]
] | The teleparallel versions of the Einstein and the Landau-Lifshitz energy-momentum complexes of the gravitational field are obtained. By using these complexes, the total energy of the universe, which includes the energy of both the matter and the gravitational fields, is then obtained. It is shown that the total energy ... |
1607.08234 | Remo Garattini | Remo Garattini and Gianluca Mandanici | Rainbow's Stars | 18 pages | null | 10.1140/epjc/s10052-017-4618-y | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent years, a growing interest on the equilibrium of compact
astrophysical objects like white dwarf and neutron stars has been manifested.
In particular, various modifications due to Planck scale energy effects have
been considered. In this paper we analyze the modification induced by Gravity's
Rainbow on the eq... | [
{
"created": "Wed, 27 Jul 2016 13:53:59 GMT",
"version": "v1"
}
] | 2017-03-08 | [
[
"Garattini",
"Remo",
""
],
[
"Mandanici",
"Gianluca",
""
]
] | In recent years, a growing interest on the equilibrium of compact astrophysical objects like white dwarf and neutron stars has been manifested. In particular, various modifications due to Planck scale energy effects have been considered. In this paper we analyze the modification induced by Gravity's Rainbow on the equi... |
gr-qc/9708018 | Sanjay Jain | Sanjay Jain (Indian Institute of Science) | Absence of initial singularities in superstring cosmology | 20 pages, revtex, including 2 PostScript figures appended using epsf.
Based on talk given at the Conference on Big Bang and Alternative
Cosmologies: A Critical Appraisal, Bangalore, India, January 1997 | null | 10.1007/BF02709328 | IISc-CTS-5/97 | gr-qc hep-th | null | In a universe whose elementary constituents are point particles there does
not seem to be any obvious mechanism for avoiding the initial singularities in
physical quantities in the standard model of cosmology. In contrast in string
theory these singularities can be absent even at the level where spacetime is
treated ... | [
{
"created": "Sun, 10 Aug 1997 17:31:22 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Jain",
"Sanjay",
"",
"Indian Institute of Science"
]
] | In a universe whose elementary constituents are point particles there does not seem to be any obvious mechanism for avoiding the initial singularities in physical quantities in the standard model of cosmology. In contrast in string theory these singularities can be absent even at the level where spacetime is treated cl... |
1406.0677 | Keisuke Izumi | Keisuke Izumi | Causal Structures in Gauss-Bonnet gravity | Version accepted by PRD (v2): 11pages, 1 figure | Phys. Rev. D 90, 044037 (2014) | 10.1103/PhysRevD.90.044037 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze causal structures in Gauss-Bonnet gravity. It is known that
Gauss-Bonnet gravity potentially has superluminal propagation of gravitons due
to its noncanonical kinetic terms. In a theory with superluminal modes, an
analysis of causality based on null curves makes no sense, and thus, we need to
analyze them ... | [
{
"created": "Tue, 3 Jun 2014 11:55:32 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Sep 2014 00:50:56 GMT",
"version": "v2"
}
] | 2014-09-04 | [
[
"Izumi",
"Keisuke",
""
]
] | We analyze causal structures in Gauss-Bonnet gravity. It is known that Gauss-Bonnet gravity potentially has superluminal propagation of gravitons due to its noncanonical kinetic terms. In a theory with superluminal modes, an analysis of causality based on null curves makes no sense, and thus, we need to analyze them in... |
gr-qc/9802006 | John Baker | John Baker and Raymond Stanley Puzio | A New Method for Solving the Initial Value Problem with Application to
Multiple Black Holes | 10 pages | Phys.Rev. D59 (1999) 044030 | 10.1103/PhysRevD.59.044030 | CGPG-97/12-2 | gr-qc | null | This work consists of two distinct parts. In the first part we present a new
method for solving the initial value problem of general relativity. Given any
spatial metric with a surface orthogonal Killing field and two freely specified
components of the extrinsic curvature we solve for extrinsic curvature's
remaining ... | [
{
"created": "Tue, 3 Feb 1998 05:34:01 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Baker",
"John",
""
],
[
"Puzio",
"Raymond Stanley",
""
]
] | This work consists of two distinct parts. In the first part we present a new method for solving the initial value problem of general relativity. Given any spatial metric with a surface orthogonal Killing field and two freely specified components of the extrinsic curvature we solve for extrinsic curvature's remaining co... |
0705.4339 | Ran Li | Ji-Rong Ren, Ran Li | Unified First Law and Thermodynamics of Dynamical Black Hole in
n-dimensional Vaidya Spacetime | 3 pages, no figure | Mod.Phys.Lett.A23:3265-3270,2008 | 10.1142/S0217732308028831 | null | gr-qc | null | As a simple but important example of dynamical black hole, we analysis the
dynamical black hole in $n$-dimensional Vaidya spacetime in detail. We
investigated the thermodynamics of field equation in $n$-dimensional Vaidya
spacetime. The unified first law was derived in terms of the methods proposed
by Sean A Hayward.... | [
{
"created": "Wed, 30 May 2007 05:12:17 GMT",
"version": "v1"
},
{
"created": "Thu, 31 May 2007 13:39:49 GMT",
"version": "v2"
}
] | 2010-05-12 | [
[
"Ren",
"Ji-Rong",
""
],
[
"Li",
"Ran",
""
]
] | As a simple but important example of dynamical black hole, we analysis the dynamical black hole in $n$-dimensional Vaidya spacetime in detail. We investigated the thermodynamics of field equation in $n$-dimensional Vaidya spacetime. The unified first law was derived in terms of the methods proposed by Sean A Hayward. T... |
1810.02915 | Joseph Sultana Dr. | Joseph Sultana, Demosthenes Kazanas | A no-hair theorem for spherically symmetric black holes in $R^2$ gravity | 10 pages | null | 10.1007/s10714-018-2463-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent paper Ca\~nate (CQG, {\bf 35}, 025018 (2018)) proved a no hair
theorem to static and spherically symmetric or stationary axisymmetric black
holes in general $f(R)$ gravity. The theorem applies for isolated
asymptotically flat or asymptotically de Sitter black holes and also in the
case when vacuum is repl... | [
{
"created": "Sat, 6 Oct 2018 00:45:19 GMT",
"version": "v1"
}
] | 2018-10-09 | [
[
"Sultana",
"Joseph",
""
],
[
"Kazanas",
"Demosthenes",
""
]
] | In a recent paper Ca\~nate (CQG, {\bf 35}, 025018 (2018)) proved a no hair theorem to static and spherically symmetric or stationary axisymmetric black holes in general $f(R)$ gravity. The theorem applies for isolated asymptotically flat or asymptotically de Sitter black holes and also in the case when vacuum is replac... |
2106.06492 | Andrea Sylvia Biscoveanu | Sylvia Biscoveanu, Maximiliano Isi, Vijay Varma, Salvatore Vitale | Measuring the spins of heavy binary black holes | Version accepted in PRD | Phys. Rev. D 104, 103018 (2021) | 10.1103/PhysRevD.104.103018 | LIGO document number P2100204 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An accurate and precise measurement of the spins of individual merging black
holes is required to understand their origin. While previous studies have
indicated that most of the spin information comes from the inspiral part of the
signal, the informative spin measurement of the heavy binary black hole system
GW190521... | [
{
"created": "Fri, 11 Jun 2021 16:26:04 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Jun 2021 18:59:36 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Nov 2021 03:13:12 GMT",
"version": "v3"
}
] | 2021-11-17 | [
[
"Biscoveanu",
"Sylvia",
""
],
[
"Isi",
"Maximiliano",
""
],
[
"Varma",
"Vijay",
""
],
[
"Vitale",
"Salvatore",
""
]
] | An accurate and precise measurement of the spins of individual merging black holes is required to understand their origin. While previous studies have indicated that most of the spin information comes from the inspiral part of the signal, the informative spin measurement of the heavy binary black hole system GW190521 s... |
1107.2948 | Joshua Smith | Joshua R Smith, Thomas Abbott, Eiichi Hirose, Nicolas Leroy, Duncan
Macleod, Jessica McIver, Peter Saulson, Peter Shawhan | A hierarchical method for vetoing noise transients in gravitational-wave
detectors | 13 pages | Class. Quantum Grav. 28 235005 (2011) | 10.1088/0264-9381/28/23/235005 | LIGO Document P1100045 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Non-Gaussian noise transients in interferometric gravitational-wave detectors
increase the background in searches for short-duration and un-modelled signals.
We describe a method for vetoing noise transients by ranking the statistical
relationship between triggers in auxiliary channels that have negligible
sensitivit... | [
{
"created": "Thu, 14 Jul 2011 20:51:06 GMT",
"version": "v1"
}
] | 2012-04-16 | [
[
"Smith",
"Joshua R",
""
],
[
"Abbott",
"Thomas",
""
],
[
"Hirose",
"Eiichi",
""
],
[
"Leroy",
"Nicolas",
""
],
[
"Macleod",
"Duncan",
""
],
[
"McIver",
"Jessica",
""
],
[
"Saulson",
"Peter",
""
],
[
... | Non-Gaussian noise transients in interferometric gravitational-wave detectors increase the background in searches for short-duration and un-modelled signals. We describe a method for vetoing noise transients by ranking the statistical relationship between triggers in auxiliary channels that have negligible sensitivity ... |
gr-qc/9508030 | null | Giampiero Esposito | The Geometry of Complex Space-Times with Torsion | 3 pages, plain-tex, published in Proceedings of the X Italian
Conference on General Relativity and Gravitational Physics, editors M.
Cerdonio et al., 1993, pages 481-483 (Singapore: World Scientific) | null | null | SISSA Ref. 86/92/A | gr-qc | null | The necessary and sufficient condition for the existence of $\alpha$-surfaces
in complex space-time manifolds with nonvanishing torsion is derived. For these
manifolds, Lie brackets of vector fields and spinor Ricci identities contain
explicitly the effects of torsion. This leads to an integrability condition for
$\a... | [
{
"created": "Mon, 14 Aug 1995 13:06:30 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Esposito",
"Giampiero",
""
]
] | The necessary and sufficient condition for the existence of $\alpha$-surfaces in complex space-time manifolds with nonvanishing torsion is derived. For these manifolds, Lie brackets of vector fields and spinor Ricci identities contain explicitly the effects of torsion. This leads to an integrability condition for $\alp... |
1811.09159 | Jia-An Lu | Jia-An Lu | de Sitter-covariant Hamiltonian formalism of Einstein--Cartan gravity | 10 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hamiltonian formalism of Einstein--Cartan (EC) gravity is a starting
point for canonical quantum gravity. The existing formalisms are at most
Lorentz covariant, or diffeomorphism covariant. Here we analyze the Hamiltonian
EC gravity in a 5d covariant way, with the gauge group being the de Sitter (dS)
group, which... | [
{
"created": "Thu, 22 Nov 2018 13:07:17 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Mar 2019 12:28:46 GMT",
"version": "v2"
}
] | 2019-03-26 | [
[
"Lu",
"Jia-An",
""
]
] | The Hamiltonian formalism of Einstein--Cartan (EC) gravity is a starting point for canonical quantum gravity. The existing formalisms are at most Lorentz covariant, or diffeomorphism covariant. Here we analyze the Hamiltonian EC gravity in a 5d covariant way, with the gauge group being the de Sitter (dS) group, which u... |
gr-qc/9910009 | Thomas Thiemann | T. Thiemann | Complete quantization of a diffeomorphism invariant field theory | 32p, LATEX | Class.Quant.Grav.12:59-88,1995 | 10.1088/0264-9381/12/1/006 | PITHA 93-33 | gr-qc | null | In order to test the canonical quantization programme for general relativity
we introduce a reduced model for a real sector of complexified Ashtekar gravity
which captures important properties of the full theory. While it does not
correspond to a subset of Einstein's gravity it has the advantage that the
programme of... | [
{
"created": "Mon, 4 Oct 1999 17:14:52 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Thiemann",
"T.",
""
]
] | In order to test the canonical quantization programme for general relativity we introduce a reduced model for a real sector of complexified Ashtekar gravity which captures important properties of the full theory. While it does not correspond to a subset of Einstein's gravity it has the advantage that the programme of c... |
1902.09208 | Kalin Staykov Dr. | Kalin V. Staykov, Daniela D. Doneva, Stoytcho S. Yazadjiev | Orbital and epicyclic frequencies in massive scalar-tensor theory with
self-interaction | 10 pages, 6 figures | null | 10.1007/s10509-019-3666-1 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Testing modified theories of gravity with direct observations of the
parameters of a neutron star is not the optimal way of testing gravitational
theories. However, observing electromagnetic signals originating from the close
vicinity of the compact object my turn out an excellent way of probing
spacetime in strong f... | [
{
"created": "Mon, 25 Feb 2019 11:47:42 GMT",
"version": "v1"
}
] | 2019-11-06 | [
[
"Staykov",
"Kalin V.",
""
],
[
"Doneva",
"Daniela D.",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | Testing modified theories of gravity with direct observations of the parameters of a neutron star is not the optimal way of testing gravitational theories. However, observing electromagnetic signals originating from the close vicinity of the compact object my turn out an excellent way of probing spacetime in strong fie... |
2406.08452 | Martin Kr\v{s}\v{s}\'ak | Martin Kr\v{s}\v{s}\'ak | Einstein Gravity from Einstein Action: Counterterms and Covariance | 12 pages; an earlier version was submitted to Gravity Research
Foundation 2024 Awards for Essays on Gravitation | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The field equations of general relativity can be derived from the Einstein
action, which is quadratic in connection coefficients, rather than the standard
action involving the Gibbons-Hawking-York term and counterterm. We show that it
is possible to construct a new counterterm directly for the Einstein action,
which ... | [
{
"created": "Wed, 12 Jun 2024 17:44:32 GMT",
"version": "v1"
}
] | 2024-06-13 | [
[
"Krššák",
"Martin",
""
]
] | The field equations of general relativity can be derived from the Einstein action, which is quadratic in connection coefficients, rather than the standard action involving the Gibbons-Hawking-York term and counterterm. We show that it is possible to construct a new counterterm directly for the Einstein action, which re... |
2403.00070 | Mariam Campbell | Mariam Campbell, Sante Carloni, Peter K. S. Dunsby and Nolene F. Naidu | Reconstructing exact solutions to relativistic stars in $f(R)$ gravity | 15 pages, 17 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We present a covariant description of non-vacuum static spherically symmetric
spacetimes in $f(R)$-gravity applying the (1+1+2) covariant formalism. The
propagation equations are then used to derive a covariant and dimensionless
form of the Tolman-Oppenheimer-Volkoff (TOV) equations. We then give a solution
strategy ... | [
{
"created": "Thu, 29 Feb 2024 19:01:06 GMT",
"version": "v1"
}
] | 2024-03-04 | [
[
"Campbell",
"Mariam",
""
],
[
"Carloni",
"Sante",
""
],
[
"Dunsby",
"Peter K. S.",
""
],
[
"Naidu",
"Nolene F.",
""
]
] | We present a covariant description of non-vacuum static spherically symmetric spacetimes in $f(R)$-gravity applying the (1+1+2) covariant formalism. The propagation equations are then used to derive a covariant and dimensionless form of the Tolman-Oppenheimer-Volkoff (TOV) equations. We then give a solution strategy to... |
1201.2489 | Aron Wall | Aron C. Wall | A discrete, unitary, causal theory of quantum gravity | 38 pages, 9 figures, v3 added to exposition and references, v4
expanded prospects section | Class. Quantum Grav. 30, 115002 (2013) | 10.1088/0264-9381/30/11/115002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A discrete model of Lorentzian quantum gravity is proposed. The theory is
completely background free, containing no reference to absolute space, time, or
simultaneity. The states at one slice of time are networks in which each vertex
is labelled with two arrows, which point along an adjacent edge, or to the
vertex it... | [
{
"created": "Thu, 12 Jan 2012 07:14:13 GMT",
"version": "v1"
},
{
"created": "Sat, 28 Apr 2012 22:03:59 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Aug 2012 23:13:11 GMT",
"version": "v3"
},
{
"created": "Tue, 14 May 2013 00:55:06 GMT",
"version": "v4"
}
] | 2015-06-03 | [
[
"Wall",
"Aron C.",
""
]
] | A discrete model of Lorentzian quantum gravity is proposed. The theory is completely background free, containing no reference to absolute space, time, or simultaneity. The states at one slice of time are networks in which each vertex is labelled with two arrows, which point along an adjacent edge, or to the vertex itse... |
1304.8042 | Ikjyot Singh Kohli | Ikjyot Singh Kohli and Michael C. Haslam | A Dynamical Systems Approach to a Bianchi Type I Viscous
Magnetohydrodynamic Model | null | Phys. Rev. D 88, 063518 (2013) | 10.1103/PhysRevD.88.063518 | null | gr-qc math.DS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the expansion-normalized variables approach to study the dynamics of a
non-tilted Bianchi Type I cosmological model with both a homogeneous magnetic
field and a viscous fluid. In our model the perfect magnetohydrodynamic
approximation is made, and both bulk and shear viscous effects are retained.
The dynamical... | [
{
"created": "Tue, 30 Apr 2013 15:52:54 GMT",
"version": "v1"
},
{
"created": "Wed, 1 May 2013 02:01:13 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Jul 2013 03:25:41 GMT",
"version": "v3"
},
{
"created": "Wed, 4 Sep 2013 22:24:20 GMT",
"version": "v4"
},
{
"cre... | 2014-02-26 | [
[
"Kohli",
"Ikjyot Singh",
""
],
[
"Haslam",
"Michael C.",
""
]
] | We use the expansion-normalized variables approach to study the dynamics of a non-tilted Bianchi Type I cosmological model with both a homogeneous magnetic field and a viscous fluid. In our model the perfect magnetohydrodynamic approximation is made, and both bulk and shear viscous effects are retained. The dynamical s... |
1207.4253 | Huan Yang | Huan Yang, David A. Nichols, Fan Zhang, Aaron Zimmerman, Zhongyang
Zhang, and Yanbei Chen | Quasinormal-mode spectrum of Kerr black holes and its geometric
interpretation | 22 pages, 16 figures | Phys. Rev. D 86, 104006 (2012) | 10.1103/PhysRevD.86.104006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is a well-known, intuitive geometric correspondence between
high-frequency QNMs of Schwarzschild black holes and null geodesics that reside
on the light-ring : the real part of the mode's frequency relates to the
geodesic's orbital frequency, and the imaginary part of the frequency
corresponds to the Lyapunov e... | [
{
"created": "Wed, 18 Jul 2012 02:22:40 GMT",
"version": "v1"
}
] | 2012-12-19 | [
[
"Yang",
"Huan",
""
],
[
"Nichols",
"David A.",
""
],
[
"Zhang",
"Fan",
""
],
[
"Zimmerman",
"Aaron",
""
],
[
"Zhang",
"Zhongyang",
""
],
[
"Chen",
"Yanbei",
""
]
] | There is a well-known, intuitive geometric correspondence between high-frequency QNMs of Schwarzschild black holes and null geodesics that reside on the light-ring : the real part of the mode's frequency relates to the geodesic's orbital frequency, and the imaginary part of the frequency corresponds to the Lyapunov exp... |
1211.3816 | Jacob D. Bekenstein | Jacob D. Bekenstein | Is a tabletop search for Planck scale signals feasible? | 9 pages, two jpg figures, RevTeX, added references, effects of
dispersion shown negligible, quantum black hole argument tightened, more
noise sources analyzed, summary section added. To appear in Physical Review D | Phys. Rev. D 86, 124040 (2012) | 10.1103/PhysRevD.86.124040 | null | gr-qc astro-ph.CO hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravity theory is untested experimentally. Could it be tested with
tabletop experiments? While the common feeling is pessimistic, a detailed
inquiry shows it possible to sidestep the onerous requirement of localization
of a probe on Planck length scale. I suggest a tabletop experiment which, given
state of th... | [
{
"created": "Fri, 16 Nov 2012 07:47:36 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Dec 2012 13:42:39 GMT",
"version": "v2"
}
] | 2013-11-06 | [
[
"Bekenstein",
"Jacob D.",
""
]
] | Quantum gravity theory is untested experimentally. Could it be tested with tabletop experiments? While the common feeling is pessimistic, a detailed inquiry shows it possible to sidestep the onerous requirement of localization of a probe on Planck length scale. I suggest a tabletop experiment which, given state of the ... |
1811.10291 | Theodosios Christodoulakis | M. Roumeliotis, A. Paliathanasis, Petros A. Terzis and T.
Christodoulakis | Reduced Lagrangians and analytic solutions in Einstein-\ae ther
Cosmology | 11 pages, Latex2e source file, no figures | null | 10.1140/epjc/s10052-019-6868-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the solution space of the field equations in the Einstein-\ae ther
theory for the case of a $FLRW$ and a LRS Bianchi Type $III$ space-time. We
also find that there are portions of the initial parameters space for which no
solution is admitted by the reduced equations. The reduced Lagrangians deduced
from t... | [
{
"created": "Mon, 26 Nov 2018 11:13:33 GMT",
"version": "v1"
}
] | 2019-05-22 | [
[
"Roumeliotis",
"M.",
""
],
[
"Paliathanasis",
"A.",
""
],
[
"Terzis",
"Petros A.",
""
],
[
"Christodoulakis",
"T.",
""
]
] | We present the solution space of the field equations in the Einstein-\ae ther theory for the case of a $FLRW$ and a LRS Bianchi Type $III$ space-time. We also find that there are portions of the initial parameters space for which no solution is admitted by the reduced equations. The reduced Lagrangians deduced from the... |
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