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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2205.00022 | Aditya Kumar Sharma | Soummyadip Basak, Aditya Kumar Sharma, Shasvath J. Kapadia, and
Parameswaran Ajith | Prospects for the observation of continuous gravitational waves from
spinning neutron stars lensed by the galactic supermassive black hole | 6 pages, 4 figures | null | 10.3847/2041-8213/acab50 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the prospects of detecting continuous gravitational waves (CGWs)
from spinning neutron stars (NSs), gravitationally lensed by the galactic
supermassive black hole. Assuming various astrophysically motivated spatial
distributions of galactic NSs, we find that CGW signals from a few ($\sim 0-6$)
neutron stars ... | [
{
"created": "Fri, 29 Apr 2022 18:01:11 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jan 2023 10:37:23 GMT",
"version": "v2"
},
{
"created": "Wed, 4 Jan 2023 06:04:23 GMT",
"version": "v3"
}
] | 2023-01-13 | [
[
"Basak",
"Soummyadip",
""
],
[
"Sharma",
"Aditya Kumar",
""
],
[
"Kapadia",
"Shasvath J.",
""
],
[
"Ajith",
"Parameswaran",
""
]
] | We study the prospects of detecting continuous gravitational waves (CGWs) from spinning neutron stars (NSs), gravitationally lensed by the galactic supermassive black hole. Assuming various astrophysically motivated spatial distributions of galactic NSs, we find that CGW signals from a few ($\sim 0-6$) neutron stars sh... |
1404.1543 | Adam Pound | Adam Pound | A conservative effect of the second-order gravitational self-force on
quasicircular orbits in Schwarzschild spacetime | 20 pages, 1 figure, version to appear in PRD, additional references,
minor typos corrected | Phys. Rev. D 90, 084039 (2014) | 10.1103/PhysRevD.90.084039 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A compact object moving on a quasicircular orbit about a Schwarzschild black
hole gradually spirals inward due to the dissipative action of its
gravitational self-force. But in addition to driving the inspiral, the
self-force has a conservative piece. Within a second-order self-force
formalism, I derive a second-orde... | [
{
"created": "Sun, 6 Apr 2014 04:28:26 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Oct 2014 20:53:36 GMT",
"version": "v2"
}
] | 2014-10-24 | [
[
"Pound",
"Adam",
""
]
] | A compact object moving on a quasicircular orbit about a Schwarzschild black hole gradually spirals inward due to the dissipative action of its gravitational self-force. But in addition to driving the inspiral, the self-force has a conservative piece. Within a second-order self-force formalism, I derive a second-order ... |
2006.03522 | Eugen Radu | Carlos Herdeiro and Eugen Radu | Static black holes without spatial isometries: from AdS multipoles to
electrovacuum scalarization | 16 pages, 5 figures. Contribution to Selected Papers of the Fifth
Amazonian Symposium on Physics (accepted in IJMPD) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review recent results on the existence of static black holes without
spatial isometries in four spacetime dimensions and propose a general framework
for their study. These configurations are regular on and outside a horizon of
spherical topology. Two different mechanisms allowing for their existence are
identified... | [
{
"created": "Fri, 5 Jun 2020 15:57:36 GMT",
"version": "v1"
}
] | 2020-06-08 | [
[
"Herdeiro",
"Carlos",
""
],
[
"Radu",
"Eugen",
""
]
] | We review recent results on the existence of static black holes without spatial isometries in four spacetime dimensions and propose a general framework for their study. These configurations are regular on and outside a horizon of spherical topology. Two different mechanisms allowing for their existence are identified. ... |
2311.18156 | Josu Aurrekoetxea | Josu C. Aurrekoetxea, Katy Clough, Jamie Bamber, Pedro G. Ferreira | The effect of wave dark matter on equal mass black hole mergers | 4 pages, 4 figures, 1 appendix, 1 movie:
https://youtu.be/2VJIfqCp7D8. Matches version published in PRL | null | 10.1103/PhysRevLett.132.211401 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | For dark matter to be detectable with gravitational waves from binary black
holes, it must reach higher than average densities in their vicinity. In the
case of light (wave-like) dark matter, the density of dark matter between the
binary can be significantly enhanced by accretion from the surrounding
environment. Her... | [
{
"created": "Thu, 30 Nov 2023 00:06:05 GMT",
"version": "v1"
},
{
"created": "Tue, 28 May 2024 16:57:05 GMT",
"version": "v2"
}
] | 2024-05-29 | [
[
"Aurrekoetxea",
"Josu C.",
""
],
[
"Clough",
"Katy",
""
],
[
"Bamber",
"Jamie",
""
],
[
"Ferreira",
"Pedro G.",
""
]
] | For dark matter to be detectable with gravitational waves from binary black holes, it must reach higher than average densities in their vicinity. In the case of light (wave-like) dark matter, the density of dark matter between the binary can be significantly enhanced by accretion from the surrounding environment. Here ... |
1501.07776 | Nosratollah Jafari Sonbolabadi | Nosrtollah Jafari | Images of the lines under the MS transformations and the Concept of
Velocity in the DSR theories | 10 pages, 3 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effect of the Maguejo-Smolin (MS) transformations on a straight line in
the energy- momentum space will be studied. We will interpret the slope of this
line as velocity $dE/dp$, which can leads to addition rule for the velocities
in the MS doubly special relativity (DSR) case. Relation between two
expressions $dE... | [
{
"created": "Fri, 30 Jan 2015 14:01:35 GMT",
"version": "v1"
}
] | 2015-03-20 | [
[
"Jafari",
"Nosrtollah",
""
]
] | The effect of the Maguejo-Smolin (MS) transformations on a straight line in the energy- momentum space will be studied. We will interpret the slope of this line as velocity $dE/dp$, which can leads to addition rule for the velocities in the MS doubly special relativity (DSR) case. Relation between two expressions $dE/d... |
2309.01894 | Nami Uchikata | Nami Uchikata, Tatsuya Narikawa, Hiroyuki Nakano, Norichika Sago,
Hideyuki Tagoshi, and Takahiro Tanaka | Searching for gravitational wave echoes from black hole binary events in
the third observing run of LIGO, Virgo, and KAGRA collaborations | 11 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational wave echo signals have been proposed as evidence for the
modification of the spacetime structure near the classical event horizon. These
signals are expected to occur after the mergers of compact binaries as a
sequence of weak pulse-like signals. Some studies have shown evidence of the
echo signals from... | [
{
"created": "Tue, 5 Sep 2023 02:06:22 GMT",
"version": "v1"
}
] | 2023-09-06 | [
[
"Uchikata",
"Nami",
""
],
[
"Narikawa",
"Tatsuya",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Sago",
"Norichika",
""
],
[
"Tagoshi",
"Hideyuki",
""
],
[
"Tanaka",
"Takahiro",
""
]
] | Gravitational wave echo signals have been proposed as evidence for the modification of the spacetime structure near the classical event horizon. These signals are expected to occur after the mergers of compact binaries as a sequence of weak pulse-like signals. Some studies have shown evidence of the echo signals from s... |
gr-qc/0609074 | Mikael Fj?llborg | Mikael Fj\"allborg, J. Mark Heinzle and Claes Uggla | Self-gravitating stationary spherically symmetric systems in
relativistic galactic dynamics | 25 pages, 1 figure | Math.Proc.CambridgePhil.Soc.143:731-752,2007 | 10.1017/S0305004107000540 | null | gr-qc | null | We study equilibrium states in relativistic galactic dynamics which are
described by solutions of the Einstein-Vlasov system for collisionless matter.
We recast the equations into a regular three-dimensional system of autonomous
first order ordinary differential equations on a bounded state space. Based on
a dynamica... | [
{
"created": "Wed, 20 Sep 2006 06:31:25 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Sep 2006 11:29:36 GMT",
"version": "v2"
},
{
"created": "Fri, 22 Sep 2006 08:09:37 GMT",
"version": "v3"
},
{
"created": "Mon, 25 Sep 2006 08:34:50 GMT",
"version": "v4"
}
] | 2019-05-01 | [
[
"Fjällborg",
"Mikael",
""
],
[
"Heinzle",
"J. Mark",
""
],
[
"Uggla",
"Claes",
""
]
] | We study equilibrium states in relativistic galactic dynamics which are described by solutions of the Einstein-Vlasov system for collisionless matter. We recast the equations into a regular three-dimensional system of autonomous first order ordinary differential equations on a bounded state space. Based on a dynamical ... |
gr-qc/9312017 | null | J. W. Moffat | Predictability in Quantum Gravity and Black Hole Evaporation | 13 pages TeX 3.0, UTPT-93-31 | null | null | null | gr-qc | null | A possible resolution of the information loss paradox for black holes is
proposed in which a phase transition occurs when the temperature of an
evaporating black hole equals a critical value, $T_c$, and Lorentz invariance
and diffeomorphism invariance are spontaneously broken. This allows a
generalization of Schr\"od... | [
{
"created": "Thu, 9 Dec 1993 20:54:58 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Moffat",
"J. W.",
""
]
] | A possible resolution of the information loss paradox for black holes is proposed in which a phase transition occurs when the temperature of an evaporating black hole equals a critical value, $T_c$, and Lorentz invariance and diffeomorphism invariance are spontaneously broken. This allows a generalization of Schr\"odin... |
2005.12745 | Seyed Hossein Hendi Dr. | S. H. Hendi, R. Ramezani-Arani and E. Rahimi | Three dimensional Lifshitz-like black hole in a special class of F(R)
gravity | 8 pages with 2 captioned figures. Accepted in Physics Letters B | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Regarding a special class of pure F(R) gravity in three dimensions, we
obtain, analytically, Lifshitz-like black hole solutions. We check the
geometrical properties of the solutions which behave such as charged BTZ black
holes in special limit. We also investigate the thermodynamic properties of the
solutions and exa... | [
{
"created": "Sun, 24 May 2020 20:52:26 GMT",
"version": "v1"
}
] | 2020-05-27 | [
[
"Hendi",
"S. H.",
""
],
[
"Ramezani-Arani",
"R.",
""
],
[
"Rahimi",
"E.",
""
]
] | Regarding a special class of pure F(R) gravity in three dimensions, we obtain, analytically, Lifshitz-like black hole solutions. We check the geometrical properties of the solutions which behave such as charged BTZ black holes in special limit. We also investigate the thermodynamic properties of the solutions and exami... |
gr-qc/0304037 | Chao-Guang Huang | Chao-Guang Huang, Han-Ying Guo, and Xiaoning Wu | On Diffeomorphism Invariance and Black Hole Entropy | 32 pages, 1 figure | Phys.Rev.D68:104006,2003 | 10.1103/PhysRevD.68.104006 | null | gr-qc | null | The Noether-charge realization and the Hamiltonian realization for the
$\diff({\cal M})$ algebra in diffeomorphism invariant gravitational theories
are studied in a covariant formalism. For the Killing vector fields, the
Nother-charge realization leads to the mass formula as an entire vanishing
Noether charge for the... | [
{
"created": "Wed, 9 Apr 2003 02:14:44 GMT",
"version": "v1"
}
] | 2009-02-24 | [
[
"Huang",
"Chao-Guang",
""
],
[
"Guo",
"Han-Ying",
""
],
[
"Wu",
"Xiaoning",
""
]
] | The Noether-charge realization and the Hamiltonian realization for the $\diff({\cal M})$ algebra in diffeomorphism invariant gravitational theories are studied in a covariant formalism. For the Killing vector fields, the Nother-charge realization leads to the mass formula as an entire vanishing Noether charge for the v... |
1707.07550 | Sadra Jazayeri Mr. | Hassan Firouzjahi, Sadra Jazayeri, Asieh Karami, Tahereh Rostami | Bubble nucleation and inflationary perturbations | null | null | 10.1088/1475-7516/2017/12/029 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study the imprints of bubble nucleation on primordial
inflationary perturbations. We assume that the bubble is formed via the
tunneling of a spectator field from the false vacuum of its potential to its
true vacuum. We consider the configuration in which the observable CMB sphere
is initially outside ... | [
{
"created": "Fri, 21 Jul 2017 08:49:49 GMT",
"version": "v1"
}
] | 2017-12-27 | [
[
"Firouzjahi",
"Hassan",
""
],
[
"Jazayeri",
"Sadra",
""
],
[
"Karami",
"Asieh",
""
],
[
"Rostami",
"Tahereh",
""
]
] | In this work we study the imprints of bubble nucleation on primordial inflationary perturbations. We assume that the bubble is formed via the tunneling of a spectator field from the false vacuum of its potential to its true vacuum. We consider the configuration in which the observable CMB sphere is initially outside of... |
2206.11467 | Richard Woodard | L. Tan (University of Florida), N. C. Tsamis (University of Crete) and
R. P. Woodard (University of Florida) | How Inflationary Gravitons Affect the Force of Gravity | 38 pages, 1 figure, 15 tables, uses LaTeX2e. arXiv admin note: text
overlap with arXiv:2107.13905 Version 2 slightly revised for publication | Universe 8 (2022) 376 | 10.3390/universe8070376 | UFIFT-QG-22-01 , CCTP-2022-3 | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We employ an unregulated computation the graviton self-energy from gravitons
on de Sitter background to infer the renormalized result. This is used to
quantum-correct the linearized Einstein equation. We solve this equation for
the potentials which represent the gravitational response to static, point
mass. We find l... | [
{
"created": "Thu, 23 Jun 2022 03:23:26 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Jul 2022 10:50:25 GMT",
"version": "v2"
}
] | 2022-07-11 | [
[
"Tan",
"L.",
"",
"University of Florida"
],
[
"Tsamis",
"N. C.",
"",
"University of Crete"
],
[
"Woodard",
"R. P.",
"",
"University of Florida"
]
] | We employ an unregulated computation the graviton self-energy from gravitons on de Sitter background to infer the renormalized result. This is used to quantum-correct the linearized Einstein equation. We solve this equation for the potentials which represent the gravitational response to static, point mass. We find lar... |
1404.4551 | Claudio Dappiaggi | Marco Benini, Claudio Dappiaggi and Simone Murro | Radiative observables for linearized gravity on asymptotically flat
spacetimes and their boundary induced states | 31 pages, added references | J. Math. Phys. 55, 082301 (2014); | 10.1063/1.4890581 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the quantization of linearized gravity on globally hyperbolic,
asymptotically flat, vacuum spacetimes and the construction of distinguished
states which are both of Hadamard form and invariant under the action of all
bulk isometries. The procedure, we follow, consists of looking for a
realization of the ob... | [
{
"created": "Thu, 17 Apr 2014 15:07:17 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Apr 2014 08:33:02 GMT",
"version": "v2"
}
] | 2022-02-24 | [
[
"Benini",
"Marco",
""
],
[
"Dappiaggi",
"Claudio",
""
],
[
"Murro",
"Simone",
""
]
] | We discuss the quantization of linearized gravity on globally hyperbolic, asymptotically flat, vacuum spacetimes and the construction of distinguished states which are both of Hadamard form and invariant under the action of all bulk isometries. The procedure, we follow, consists of looking for a realization of the obse... |
1510.03798 | Jay Tasson | Ross J. Jennings, Jay D. Tasson, and Shun Yang | Matter-Sector Lorentz Violation in Binary Pulsars | 8 pages, 2 figures | Phys. Rev. D 92, 125028 (2015) | 10.1103/PhysRevD.92.125028 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Violations of local Lorentz invariance in the gravitationally coupled matter
sector have yet to be sought in strong-gravity systems. We present the
implications of matter-sector Lorentz violation for orbital perturbations in
pulsar systems and show that the analysis of pulsar data can provide
sensitivities to these e... | [
{
"created": "Tue, 13 Oct 2015 17:49:56 GMT",
"version": "v1"
}
] | 2015-12-30 | [
[
"Jennings",
"Ross J.",
""
],
[
"Tasson",
"Jay D.",
""
],
[
"Yang",
"Shun",
""
]
] | Violations of local Lorentz invariance in the gravitationally coupled matter sector have yet to be sought in strong-gravity systems. We present the implications of matter-sector Lorentz violation for orbital perturbations in pulsar systems and show that the analysis of pulsar data can provide sensitivities to these eff... |
0908.1950 | David Delphenich | D. H. Delphenich | On the variational formulation of systems with non-holonomic constraints | 22 pages, 1 figure | Ann. Phys. (Berlin) 18 (2009), 1-22 | 10.1002/andp.20095210907 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a previous article by the author, it was shown that one could effectively
give a variational formulation to non-conservative mechanical systems by
starting with the first variation functional instead of an action functional.
In this article, it is shown that this same approach will also allow one to
give a variati... | [
{
"created": "Thu, 13 Aug 2009 18:19:48 GMT",
"version": "v1"
}
] | 2022-06-15 | [
[
"Delphenich",
"D. H.",
""
]
] | In a previous article by the author, it was shown that one could effectively give a variational formulation to non-conservative mechanical systems by starting with the first variation functional instead of an action functional. In this article, it is shown that this same approach will also allow one to give a variation... |
1104.3244 | Paul Wesson | Paul S. Wesson | The Physical Nature of Five-Dimensional Solutions: A Survey | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The basic quasi-Schwarzschild 5D objects known as solitons have a long
history, which is reviewed. Then some material is added, leading to the
inference that a soliton is a singularity in the geometry which represents a
bivalent source of gravitational and scalar mass.
| [
{
"created": "Sat, 16 Apr 2011 14:50:38 GMT",
"version": "v1"
}
] | 2011-04-19 | [
[
"Wesson",
"Paul S.",
""
]
] | The basic quasi-Schwarzschild 5D objects known as solitons have a long history, which is reviewed. Then some material is added, leading to the inference that a soliton is a singularity in the geometry which represents a bivalent source of gravitational and scalar mass. |
2107.12272 | Guilherme Raposo | Artur Alho, Jos\'e Nat\'ario, Paolo Pani, Guilherme Raposo | Compact elastic objects in general relativity | 5 pages, 3 figures; v3: Inclusion of discussion regarding missing
sound speed. Updated plot of Fig. 2 with previously missing velocity.
Conclusions and results unchanged | null | 10.1103/PhysRevD.105.044025 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a rigorous and general framework to study systematically
self-gravitating elastic materials within general relativity, and apply it to
investigate the existence and viability, including radial stability, of
spherically symmetric elastic stars. We present the mass-radius ($M-R$) diagram
for various famili... | [
{
"created": "Mon, 26 Jul 2021 15:25:13 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Dec 2021 19:34:35 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Jun 2022 18:50:18 GMT",
"version": "v3"
}
] | 2022-06-07 | [
[
"Alho",
"Artur",
""
],
[
"Natário",
"José",
""
],
[
"Pani",
"Paolo",
""
],
[
"Raposo",
"Guilherme",
""
]
] | We introduce a rigorous and general framework to study systematically self-gravitating elastic materials within general relativity, and apply it to investigate the existence and viability, including radial stability, of spherically symmetric elastic stars. We present the mass-radius ($M-R$) diagram for various families... |
1002.1361 | Masato Minamitsuji | Hyeong-Chan Kim, Masato Minamitsuji | Scalar field in the anisotropic universe | The version to appear in PRD: comments about the choice of the vacuum
added, references added. | Phys.Rev.D81:083517,2010; Erratum-ibid.D82:109904,2010 | 10.1103/PhysRevD.82.109904 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the primordial spectrum of a massless and minimally coupled scalar
field, produced during the initial anisotropic epoch before the onset of
inflation. We consider two models of the anisotropic cosmology, the (planar)
Kasner de Sitter solution (Bianchi I) and the Taub-NUT de Sitter solution
(Bianchi IX), wh... | [
{
"created": "Sat, 6 Feb 2010 08:25:38 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Mar 2010 01:58:19 GMT",
"version": "v2"
}
] | 2015-03-13 | [
[
"Kim",
"Hyeong-Chan",
""
],
[
"Minamitsuji",
"Masato",
""
]
] | We discuss the primordial spectrum of a massless and minimally coupled scalar field, produced during the initial anisotropic epoch before the onset of inflation. We consider two models of the anisotropic cosmology, the (planar) Kasner de Sitter solution (Bianchi I) and the Taub-NUT de Sitter solution (Bianchi IX), wher... |
2304.00088 | Arad Nasiri | Arad Nasiri | Synge's world function applied to causal diamonds and causal sets | 16 pages, 1 figure | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the major tasks in discrete theories of gravity, including causal set
theory, is to discover how the combinatorics of the underlying discrete
structure recovers various geometric aspects of the emergent spacetime
manifold. In this paper, I develop a new covariant approach to connect the
combinatorics of a Pois... | [
{
"created": "Fri, 31 Mar 2023 19:29:18 GMT",
"version": "v1"
}
] | 2023-04-04 | [
[
"Nasiri",
"Arad",
""
]
] | One of the major tasks in discrete theories of gravity, including causal set theory, is to discover how the combinatorics of the underlying discrete structure recovers various geometric aspects of the emergent spacetime manifold. In this paper, I develop a new covariant approach to connect the combinatorics of a Poisso... |
1703.00418 | Andrei Lebed G | Andrei G Lebed | Reply to Comment on "Does the Equivalence between Gravitational Mass and
Energy Survive for a Composite Quantum Body?" | Submitted to Advances in High Energy Physics | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have recently shown that both passive and active gravitational masses of a
composite body are not equivalent to its energy due to some quantum effects. We
have also suggested an idealized and more realistic experiments to detect the
above mentioned inequivalence for a passive gravitational mass. The suggested
idea... | [
{
"created": "Wed, 1 Mar 2017 18:02:12 GMT",
"version": "v1"
}
] | 2017-03-02 | [
[
"Lebed",
"Andrei G",
""
]
] | We have recently shown that both passive and active gravitational masses of a composite body are not equivalent to its energy due to some quantum effects. We have also suggested an idealized and more realistic experiments to detect the above mentioned inequivalence for a passive gravitational mass. The suggested ideali... |
2211.16394 | Valentin Kuzmichev | V. E. Kuzmichev, V. V. Kuzmichev (Bogolyubov Institute for Theoretical
Physics) | The Hubble tension from the standpoint of quantum cosmology | 14 pages, 1 figure, v.2: added a new section on numerical estimates,
substantially updated the introduction and other sections, significantly
expanded the list of references, revised the abstract, v.3: added a new
section on stiff matter, expanded the list of references | Eur. Phys. J. C 84, 121 (2024) | 10.1140/epjc/s10052-024-12490-6 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hubble tension is analyzed in the framework of quantum cosmological
approach. It is found that there arises a new summand in the expression for the
total energy density stipulated by the quantum Bohm potential. This additional
energy density acts similarly to a stiff matter component, modifying the
expansion hist... | [
{
"created": "Tue, 29 Nov 2022 17:20:17 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Oct 2023 13:07:44 GMT",
"version": "v2"
},
{
"created": "Sun, 11 Feb 2024 13:30:53 GMT",
"version": "v3"
}
] | 2024-02-13 | [
[
"Kuzmichev",
"V. E.",
"",
"Bogolyubov Institute for Theoretical\n Physics"
],
[
"Kuzmichev",
"V. V.",
"",
"Bogolyubov Institute for Theoretical\n Physics"
]
] | The Hubble tension is analyzed in the framework of quantum cosmological approach. It is found that there arises a new summand in the expression for the total energy density stipulated by the quantum Bohm potential. This additional energy density acts similarly to a stiff matter component, modifying the expansion histor... |
gr-qc/0208079 | Michael T. Anderson | Michael T. Anderson | Cheeger-Gromov Theory and Applications to General Relativity | 23pp, for Proc. 2002 Cargese School on General Relativity | null | null | null | gr-qc math.DG | null | This paper surveys aspects of the convergence and degeneration of Riemannian
metrics on a given manifold M - the Cheeger-Gromov theory - and extensions
thereof to Ricci curvature in place of full curvature. This theory is then
applied to study a collection of different issues in mathematical aapects of
General Relati... | [
{
"created": "Mon, 26 Aug 2002 18:12:16 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Jan 2004 14:26:29 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Anderson",
"Michael T.",
""
]
] | This paper surveys aspects of the convergence and degeneration of Riemannian metrics on a given manifold M - the Cheeger-Gromov theory - and extensions thereof to Ricci curvature in place of full curvature. This theory is then applied to study a collection of different issues in mathematical aapects of General Relativi... |
1609.04752 | Pradip Mukherjee | Pradip Mukherjee, Anirban Saha and Amit Singha Roy | A field theoretic approach to the energy momentum tensor for theories
coupled with gravity | 6 pages, one figure, Latex Published in Mod. Phys. Lett. A | Modern Physics Letters A Vol. 33, No. 2 (2018) 1850010 | 10.1142/S0217732318500104 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a field-theoretic algorithm of obtaining energy momentum tensor
(EMT) for gravitationally coupled theories. The method is based on an auxiliary
field theory and equally applicable to both minimal and non-minimal coupling.
The algorithm illuminates the connection between the EMT, obtained by
functional vari... | [
{
"created": "Thu, 15 Sep 2016 17:50:54 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Oct 2016 11:44:48 GMT",
"version": "v2"
},
{
"created": "Wed, 4 Jan 2017 10:30:27 GMT",
"version": "v3"
},
{
"created": "Sun, 14 Jan 2018 11:11:34 GMT",
"version": "v4"
}
] | 2018-03-08 | [
[
"Mukherjee",
"Pradip",
""
],
[
"Saha",
"Anirban",
""
],
[
"Roy",
"Amit Singha",
""
]
] | We provide a field-theoretic algorithm of obtaining energy momentum tensor (EMT) for gravitationally coupled theories. The method is based on an auxiliary field theory and equally applicable to both minimal and non-minimal coupling. The algorithm illuminates the connection between the EMT, obtained by functional variat... |
2106.07665 | Leonardo Mastrototaro | Leonardo Mastrototaro and Gaetano Lambiase | Neutrino spin oscillations in conformally gravity coupling models and
quintessence surrounding a black hole | 14 pages, 8 figures. Accepted for pubblication to PRD
(https://journals.aps.org/prd/) | null | 10.1103/PhysRevD.104.024021 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the spin transitions of neutrinos caused by the
interaction with a gravitational field. We consider a model with a scalar field
(describing screening effects) conformally coupled to matter and neutrinos. The
presence of screening effects suppresses the neutrino spin-flip probability as
compare... | [
{
"created": "Mon, 14 Jun 2021 18:00:03 GMT",
"version": "v1"
}
] | 2021-07-12 | [
[
"Mastrototaro",
"Leonardo",
""
],
[
"Lambiase",
"Gaetano",
""
]
] | In this paper, we study the spin transitions of neutrinos caused by the interaction with a gravitational field. We consider a model with a scalar field (describing screening effects) conformally coupled to matter and neutrinos. The presence of screening effects suppresses the neutrino spin-flip probability as compared ... |
gr-qc/9811074 | Peter Dunsby | Ewald Wessels | Exact analytic characteristic initial data for axisymmetric,
non-rotating, vacuum spacetimes, with an application to the binary black hole
problem | 12 pages. Published in Class. Quantum Grav. 15, 2509-2522 | Class.Quant.Grav. 15 (1998) 2509-2522 | 10.1088/0264-9381/15/8/025 | null | gr-qc | null | Bondi's approach to the construction of a coordinate system is used with a
different choice of gauge, in accordance with which the radial coordinate r is
an affine parameter, to cast the metric tensor into a form suitable for use
with the Newman-Penrose null tetrad formalism. The choice of tetrad has the
result that ... | [
{
"created": "Sat, 21 Nov 1998 09:48:02 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Wessels",
"Ewald",
""
]
] | Bondi's approach to the construction of a coordinate system is used with a different choice of gauge, in accordance with which the radial coordinate r is an affine parameter, to cast the metric tensor into a form suitable for use with the Newman-Penrose null tetrad formalism. The choice of tetrad has the result that th... |
1701.00170 | Aureliano Skirzewski | Aureliano Skirzewski and Jesus Rodriguez | Effective FRW Radiation Dominated Era | 6 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute effective equations of the quantum FRW flat universe in the
radiation dominated era at $\hbar$ order, described in terms of Ashtekar
variables employing a new method for the geometrical formulation of quantum
mechanics. Additional terms of quantum nature correct the classical equations
of motion. As a cons... | [
{
"created": "Sat, 31 Dec 2016 22:22:06 GMT",
"version": "v1"
}
] | 2017-01-03 | [
[
"Skirzewski",
"Aureliano",
""
],
[
"Rodriguez",
"Jesus",
""
]
] | We compute effective equations of the quantum FRW flat universe in the radiation dominated era at $\hbar$ order, described in terms of Ashtekar variables employing a new method for the geometrical formulation of quantum mechanics. Additional terms of quantum nature correct the classical equations of motion. As a conseq... |
gr-qc/0407057 | Szabolcs Marka | S. Mohanty, Sz. Marka, R. Rahkola, S. Mukherjee, I. Leonor, R. Frey,
J. Cannizzo, J. Camp | Search algorithm for a gravitational wave signal in association with
Gamma Ray Burst GRB030329 using the LIGO detectors | To appear in the Proceedings of 8th Gravitational Wave Data Analysis
Workshop (Milwaukee, WI) (Class. Quantum Grav.) | Class.Quant.Grav. 21 (2004) S1831-S1838 | 10.1088/0264-9381/21/20/026 | null | gr-qc | null | One of the brightest Gamma Ray Burst ever recorded, GRB030329, occurred
during the second science run of the LIGO detectors. At that time, both
interferometers at the Hanford, WA LIGO site were in lock and acquiring data.
The data collected from the two Hanford detectors was analyzed for the presence
of a gravitation... | [
{
"created": "Thu, 15 Jul 2004 00:28:13 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Mohanty",
"S.",
""
],
[
"Marka",
"Sz.",
""
],
[
"Rahkola",
"R.",
""
],
[
"Mukherjee",
"S.",
""
],
[
"Leonor",
"I.",
""
],
[
"Frey",
"R.",
""
],
[
"Cannizzo",
"J.",
""
],
[
"Camp",
"J.",
""
... | One of the brightest Gamma Ray Burst ever recorded, GRB030329, occurred during the second science run of the LIGO detectors. At that time, both interferometers at the Hanford, WA LIGO site were in lock and acquiring data. The data collected from the two Hanford detectors was analyzed for the presence of a gravitational... |
gr-qc/9909011 | Sung Geun Lee | Sunggeun Lee, Chanyong Park, Sang-Jin Sin (Hnayang Univ.) | Phases of Brans-Dicke cosmology(II):Matter from NS-NS sector | 28 pages, 20 eps figures | null | null | null | gr-qc hep-th | null | We study the cosmology of the Brans-Dicke(BD) theory coupled to perfect fluid
type matter. In our previous works, the case where matter is coming from the
Ramond-Ramond sector of the string theory was studied. Here, we study the case
where matter is coming from the NS-NS sector. Exact solutions are found and the
cosm... | [
{
"created": "Fri, 3 Sep 1999 02:04:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lee",
"Sunggeun",
"",
"Hnayang Univ."
],
[
"Park",
"Chanyong",
"",
"Hnayang Univ."
],
[
"Sin",
"Sang-Jin",
"",
"Hnayang Univ."
]
] | We study the cosmology of the Brans-Dicke(BD) theory coupled to perfect fluid type matter. In our previous works, the case where matter is coming from the Ramond-Ramond sector of the string theory was studied. Here, we study the case where matter is coming from the NS-NS sector. Exact solutions are found and the cosmol... |
gr-qc/9609060 | null | T. Shirafuji, G.G.L. Nashed and Y.Kobayashi | Equivalence principle in the new general relativity | 18 pages, LaTeX, published in Prog. Theor. Phys. 96 No.5 (1996) | Prog.Theor.Phys. 96 (1996) 933-948 | 10.1143/PTP.96.933 | STUPP--96--147 | gr-qc | null | We study the problem of whether the active gravitational mass of an isolated
system is equal to the total energy in the tetrad theory of gravitation. The
superpotential is derived using the gravitational Lagrangian which is invariant
under parity operation, and applied to an exact spherically symmetric solution.
Its ... | [
{
"created": "Thu, 26 Sep 1996 10:58:48 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Shirafuji",
"T.",
""
],
[
"Nashed",
"G. G. L.",
""
],
[
"Kobayashi",
"Y.",
""
]
] | We study the problem of whether the active gravitational mass of an isolated system is equal to the total energy in the tetrad theory of gravitation. The superpotential is derived using the gravitational Lagrangian which is invariant under parity operation, and applied to an exact spherically symmetric solution. Its as... |
0811.2814 | Neil J. Cornish | Vincent Corbin and Neil J. Cornish | Semi-classical limit and minimum decoherence in the Conditional
Probability Interpretation of Quantum Mechanics | 8 pages, references added | Found.Phys.39:474-485,2009 | 10.1007/s10701-009-9298-5 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Conditional Probability Interpretation of Quantum Mechanics replaces the
abstract notion of time used in standard Quantum Mechanics by the time that can
be read off from a physical clock. The use of physical clocks leads to apparent
non-unitary and decoherence. Here we show that a close approximation to
standard ... | [
{
"created": "Mon, 17 Nov 2008 22:49:50 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Dec 2008 22:33:34 GMT",
"version": "v2"
}
] | 2009-11-13 | [
[
"Corbin",
"Vincent",
""
],
[
"Cornish",
"Neil J.",
""
]
] | The Conditional Probability Interpretation of Quantum Mechanics replaces the abstract notion of time used in standard Quantum Mechanics by the time that can be read off from a physical clock. The use of physical clocks leads to apparent non-unitary and decoherence. Here we show that a close approximation to standard Qu... |
1610.04507 | Klaus Kassner | Klaus Kassner (Institut f\"ur Theoretische Physik,
Otto-von-Guericke-Universit\"at Magdeburg, Germany) | Dust ball physics and the Schwarzschild metric | 9 pages, 2 figures This is the version that has been accepted for
publication in the American Journal of Physics | Am. J. Phys. 85, 619 (2017) | 10.1119/1.4982785 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A physics-first derivation of the Schwarzschild metric is given. Gravitation
is described in terms of the effects of tidal forces (or of spacetime
curvature) on the volume of a small ball of test particles (a dust ball),
freely falling after all particles were at rest with respect to each other
initially. The possibi... | [
{
"created": "Fri, 14 Oct 2016 15:44:15 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Dec 2016 16:50:46 GMT",
"version": "v2"
}
] | 2017-07-20 | [
[
"Kassner",
"Klaus",
"",
"Institut für Theoretische Physik,\n Otto-von-Guericke-Universität Magdeburg, Germany"
]
] | A physics-first derivation of the Schwarzschild metric is given. Gravitation is described in terms of the effects of tidal forces (or of spacetime curvature) on the volume of a small ball of test particles (a dust ball), freely falling after all particles were at rest with respect to each other initially. The possibili... |
1810.00432 | Niels Warburton | Marc Casals, Adrian C. Ottewill, Niels Warburton | High-order asymptotics for the Spin-Weighted Spheroidal Equation at
large real frequency | 11 pages, 2 figures | Proc. R. Soc. A 475:20180701 (2019) | 10.1098/rspa.2018.0701 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spin-weighted spheroidal eigenvalues and eigenfunctions arise in the
separation by variables of spin-field perturbations of Kerr black holes. We
derive a large, real-frequency asymptotic expansion of the spin-weighted
spheroidal eigenvalues and eigenfunctions to high order. This expansion
corrects and extends exi... | [
{
"created": "Sun, 30 Sep 2018 17:56:08 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Feb 2019 22:26:18 GMT",
"version": "v2"
}
] | 2019-02-08 | [
[
"Casals",
"Marc",
""
],
[
"Ottewill",
"Adrian C.",
""
],
[
"Warburton",
"Niels",
""
]
] | The spin-weighted spheroidal eigenvalues and eigenfunctions arise in the separation by variables of spin-field perturbations of Kerr black holes. We derive a large, real-frequency asymptotic expansion of the spin-weighted spheroidal eigenvalues and eigenfunctions to high order. This expansion corrects and extends exist... |
1910.14259 | Ajit Mehta | Tousif Islam, Ajit Kumar Mehta, Abhirup Ghosh, Vijay Varma,
Parameswaran Ajith, B. S. Sathyaprakash | Testing the"no-hair" nature of binary black holes using the consistency
of multipolar gravitational radiation | 10 pages, 13 figures | Phys. Rev. D 101, 024032 (2020) | 10.1103/PhysRevD.101.024032 | LIGO-P1900318-v2 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational-wave (GW) observations of binary black holes offer the best
probes of the relativistic, strong-field regime of gravity. Gravitational
radiation, in the leading order is quadrupolar. However, non-quadrupole
(higher-order) modes make appreciable contribution to the radiation from binary
black holes with l... | [
{
"created": "Thu, 31 Oct 2019 04:56:40 GMT",
"version": "v1"
}
] | 2020-01-15 | [
[
"Islam",
"Tousif",
""
],
[
"Mehta",
"Ajit Kumar",
""
],
[
"Ghosh",
"Abhirup",
""
],
[
"Varma",
"Vijay",
""
],
[
"Ajith",
"Parameswaran",
""
],
[
"Sathyaprakash",
"B. S.",
""
]
] | Gravitational-wave (GW) observations of binary black holes offer the best probes of the relativistic, strong-field regime of gravity. Gravitational radiation, in the leading order is quadrupolar. However, non-quadrupole (higher-order) modes make appreciable contribution to the radiation from binary black holes with lar... |
2005.08109 | Wolfgang Hasse | Ingo Abraham, Wolfgang Hasse and Martin Plato | Numerical Modelling of Satellite Downlink Signals in a
Finslerian-Perturbed Schwarzschild Spacetime | null | Universe 6 (2020) 57 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The work presented in this paper aims to contribute to the problem of testing
Finsler gravity theories by means of experiments and observations in the solar
system. Within a class of spherically symmetric static Finsler spacetimes we
consider a satellite with an on-board atomic clock, orbiting in the
Finslerian-pertu... | [
{
"created": "Sat, 16 May 2020 21:20:00 GMT",
"version": "v1"
}
] | 2020-05-19 | [
[
"Abraham",
"Ingo",
""
],
[
"Hasse",
"Wolfgang",
""
],
[
"Plato",
"Martin",
""
]
] | The work presented in this paper aims to contribute to the problem of testing Finsler gravity theories by means of experiments and observations in the solar system. Within a class of spherically symmetric static Finsler spacetimes we consider a satellite with an on-board atomic clock, orbiting in the Finslerian-perturb... |
1105.3117 | Sven Zschocke | Sven Zschocke | Light-propagation in the gravitational field of moving quadrupoles | 7 pages, no figures, report for astrometric mission Gaia | null | null | GAIA-CA-TN-LO-SZ-007-1 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A simplified formula for light-deflection in the quadrupole field of moving
massive bodies has been obtained in [1,2,3], which will be applied for Gaia
data reduction. So far, in Gaia data reduction it has been assumed that the
positions of the giant planets should be computed at the retarded instant of
time. The pro... | [
{
"created": "Mon, 16 May 2011 15:08:10 GMT",
"version": "v1"
}
] | 2011-05-17 | [
[
"Zschocke",
"Sven",
""
]
] | A simplified formula for light-deflection in the quadrupole field of moving massive bodies has been obtained in [1,2,3], which will be applied for Gaia data reduction. So far, in Gaia data reduction it has been assumed that the positions of the giant planets should be computed at the retarded instant of time. The probl... |
1604.05012 | J Erik Baxter | J. Erik Baxter | On the global existence of spherically symmetric hairy black holes and
solitons in anti-de Sitter Einstein-Yang-Mills theories with compact
semisimple gauge groups | 52 pages. arXiv admin note: text overlap with arXiv:gr-qc/0008042 by
other authors | General Relativity and Gravitation, 48 (10) 1-43 (2016) | 10.1007/s10714-016-2126-2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the existence of black hole and soliton solutions to four
dimensional, anti-de Sitter (adS), Einstein-Yang-Mills theories with general
semisimple connected and simply connected gauge groups, concentrating on the
so-called "regular" case. We here generalise results for the asymptotically
flat case, and ... | [
{
"created": "Mon, 18 Apr 2016 06:55:36 GMT",
"version": "v1"
}
] | 2018-12-14 | [
[
"Baxter",
"J. Erik",
""
]
] | We investigate the existence of black hole and soliton solutions to four dimensional, anti-de Sitter (adS), Einstein-Yang-Mills theories with general semisimple connected and simply connected gauge groups, concentrating on the so-called "regular" case. We here generalise results for the asymptotically flat case, and co... |
gr-qc/9409040 | Ulvi Yurtsever | Ulvi Yurtsever | A remark on kinks and time machines | 4 pages | null | 10.1007/BF02108071 | null | gr-qc | null | We describe an elementary proof that a manifold with the topology of the
Politzer time machine does not admit a nonsingular, asymptotically flat Lorentz
metric.
| [
{
"created": "Mon, 19 Sep 1994 23:05:27 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Yurtsever",
"Ulvi",
""
]
] | We describe an elementary proof that a manifold with the topology of the Politzer time machine does not admit a nonsingular, asymptotically flat Lorentz metric. |
1204.1347 | Tapas Kumar Das | Hung-Yi Pu, Ishita Maiti, Tapas Kumar Das and Hsiang-Kuang Chang | On Spin Dependence of Relativistic Acoustic Geometry | 22 pages, 11 figures, Comments welcome | null | 10.1088/0264-9381/29/24/245020 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work makes the first ever attempt to understand the influence of the
black hole background space-time in determining the fundamental properties of
the embedded relativistic acoustic geometry. To accomplish such task, the role
of the spin angular momentum of the astrophysical black hole (the Kerr
parameter $a$ --... | [
{
"created": "Thu, 5 Apr 2012 20:00:40 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Pu",
"Hung-Yi",
""
],
[
"Maiti",
"Ishita",
""
],
[
"Das",
"Tapas Kumar",
""
],
[
"Chang",
"Hsiang-Kuang",
""
]
] | This work makes the first ever attempt to understand the influence of the black hole background space-time in determining the fundamental properties of the embedded relativistic acoustic geometry. To accomplish such task, the role of the spin angular momentum of the astrophysical black hole (the Kerr parameter $a$ -- a... |
1403.3957 | Thomas-Paul Hack | Thomas-Paul Hack | Quantization of the linearised Einstein-Klein-Gordon system on arbitrary
backgrounds and the special case of perturbations in Inflation | 39 pages, v2: improved discussion of non-locality of Bardeen
potentials; matches published version | Class. Quantum Grav. 31 (2014) 215004 | 10.1088/0264-9381/31/21/215004 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We quantize the linearised Einstein-Klein-Gordon system on arbitrary on-shell
backgrounds in a manifestly covariant and gauge-invariant manner. For the
special case of perturbations in Inflation, i.e. on-shell backgrounds of
Friedmann-Lema\^itre-Robertson-Walker type, we compare our general quantization
construction ... | [
{
"created": "Sun, 16 Mar 2014 20:07:52 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jan 2016 23:12:56 GMT",
"version": "v2"
}
] | 2016-01-22 | [
[
"Hack",
"Thomas-Paul",
""
]
] | We quantize the linearised Einstein-Klein-Gordon system on arbitrary on-shell backgrounds in a manifestly covariant and gauge-invariant manner. For the special case of perturbations in Inflation, i.e. on-shell backgrounds of Friedmann-Lema\^itre-Robertson-Walker type, we compare our general quantization construction wi... |
0705.0904 | Dr. Anirudh Pradhan | Anirudh Pradhan, Anju Rai and Raj Bali | String Cosmological Model in Cylindrically Symmetric Inhomogeneous
Universe with Electromagnetic Field | 9 pages with minute mathematical correction | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cylindrically symmetric inhomogeneous string cosmological models in presence
of electromagnetic field is investigated. We have assumed that $F_{12}$ is the
only non-vanishing component of $F_{ij}$. The Maxwell's equations require that
$F_{12}$ is the function of $x$ and $t$ both and the magnetic permeability is
the f... | [
{
"created": "Mon, 7 May 2007 13:41:25 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Jun 2007 12:03:24 GMT",
"version": "v2"
},
{
"created": "Tue, 24 Jul 2007 13:37:32 GMT",
"version": "v3"
},
{
"created": "Sun, 4 May 2014 07:51:00 GMT",
"version": "v4"
}
] | 2014-05-06 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Rai",
"Anju",
""
],
[
"Bali",
"Raj",
""
]
] | Cylindrically symmetric inhomogeneous string cosmological models in presence of electromagnetic field is investigated. We have assumed that $F_{12}$ is the only non-vanishing component of $F_{ij}$. The Maxwell's equations require that $F_{12}$ is the function of $x$ and $t$ both and the magnetic permeability is the fun... |
1804.00519 | Vittorio De Falco Dr | Vittorio De Falco, Emmanuele Battista, and Maurizio Falanga | Lagrangian formulation of the general relativistic Poynting-Robertson
effect | 11 pages, 3 figures | Physical Review D 2018 | 10.1103/PhysRevD.97.084048 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose the Lagrangian formulation for describing the motion of a test
particle in a general relativistic, stationary, and axially symmetric
spacetime. The test particle is also affected by a radiation field, modeled as
a coherent flux of photons traveling along the null geodesics of the background
spacetime, incl... | [
{
"created": "Fri, 30 Mar 2018 16:01:36 GMT",
"version": "v1"
}
] | 2018-05-07 | [
[
"De Falco",
"Vittorio",
""
],
[
"Battista",
"Emmanuele",
""
],
[
"Falanga",
"Maurizio",
""
]
] | We propose the Lagrangian formulation for describing the motion of a test particle in a general relativistic, stationary, and axially symmetric spacetime. The test particle is also affected by a radiation field, modeled as a coherent flux of photons traveling along the null geodesics of the background spacetime, includ... |
1004.5546 | Thomas Philbin | Germain Rousseaux, Philippe Maissa, Christian Mathis, Pierre Coullet,
Thomas G. Philbin and Ulf Leonhardt | Horizon effects with surface waves on moving water | 30 pages, 15 figures. Minor changes | New J. Phys. 12 (2010) 095018 | 10.1088/1367-2630/12/9/095018 | null | gr-qc physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Surface waves on a stationary flow of water are considered, in a linear model
that includes the surface tension of the fluid. The resulting gravity-capillary
waves experience a rich array of horizon effects when propagating against the
flow. In some cases three horizons (points where the group velocity of the wave
re... | [
{
"created": "Fri, 30 Apr 2010 14:53:21 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Oct 2010 09:41:35 GMT",
"version": "v2"
}
] | 2015-05-18 | [
[
"Rousseaux",
"Germain",
""
],
[
"Maissa",
"Philippe",
""
],
[
"Mathis",
"Christian",
""
],
[
"Coullet",
"Pierre",
""
],
[
"Philbin",
"Thomas G.",
""
],
[
"Leonhardt",
"Ulf",
""
]
] | Surface waves on a stationary flow of water are considered, in a linear model that includes the surface tension of the fluid. The resulting gravity-capillary waves experience a rich array of horizon effects when propagating against the flow. In some cases three horizons (points where the group velocity of the wave reve... |
2007.07906 | Yasuyuki Hatsuda | Yasuyuki Hatsuda | An alternative to the Teukolsky equation | 13 pages, 3 figures, v2: note added, references added, v3: published
version | null | 10.1007/s10714-021-02866-4 | RUP-20-24 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We conjecture a new ordinary differential equation exactly isospectral to the
radial component of the homogeneous Teukolsky equation. We find this novel
relation by a hidden symmetry implied from a four-dimensional $\mathcal{N}=2$
supersymmetric quantum chromodynamics. Our proposal is powerful both in
analytical and ... | [
{
"created": "Wed, 15 Jul 2020 18:00:01 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Jul 2020 03:01:52 GMT",
"version": "v2"
},
{
"created": "Wed, 27 Oct 2021 22:46:06 GMT",
"version": "v3"
}
] | 2021-10-29 | [
[
"Hatsuda",
"Yasuyuki",
""
]
] | We conjecture a new ordinary differential equation exactly isospectral to the radial component of the homogeneous Teukolsky equation. We find this novel relation by a hidden symmetry implied from a four-dimensional $\mathcal{N}=2$ supersymmetric quantum chromodynamics. Our proposal is powerful both in analytical and in... |
1407.0090 | Shilong Liao | Wen-biao Han and Shi-long Liao | PSR J0337+1715: an appropriate laboratory for testing the Nordtvedt
effect | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | Highly accurate binary-pulsar timing plays an important role in test of
General Relativity. In this Letter, we argue that PSR J0337+1715, a
milli-second pulsar in a stellar triple system, could be a very good laboratory
for testing the strong equivalence principle (SEP). From the reported orbital
parameters of this t... | [
{
"created": "Tue, 1 Jul 2014 01:47:08 GMT",
"version": "v1"
}
] | 2014-07-02 | [
[
"Han",
"Wen-biao",
""
],
[
"Liao",
"Shi-long",
""
]
] | Highly accurate binary-pulsar timing plays an important role in test of General Relativity. In this Letter, we argue that PSR J0337+1715, a milli-second pulsar in a stellar triple system, could be a very good laboratory for testing the strong equivalence principle (SEP). From the reported orbital parameters of this tri... |
1505.04781 | Xun Wang | Xun Wang | Constraints on force-free magnetospheres for Kerr(-AdS) black holes with
non-null currents | 23 pages; 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Force-free magnetospheres are of particular interest due to their role in
energy extraction from Kerr black holes via the Blandford-Znajek process.
Recently, a class of exact analytic solutions has been found with null currents
[1,2]. In this paper, we elaborate some constraints on various force-free
magnetosphere so... | [
{
"created": "Mon, 18 May 2015 19:59:44 GMT",
"version": "v1"
}
] | 2015-05-19 | [
[
"Wang",
"Xun",
""
]
] | Force-free magnetospheres are of particular interest due to their role in energy extraction from Kerr black holes via the Blandford-Znajek process. Recently, a class of exact analytic solutions has been found with null currents [1,2]. In this paper, we elaborate some constraints on various force-free magnetosphere solu... |
1109.2090 | Norman Cruz | Norman Cruz, Samuel Lepe, and Francisco Pe\~na | Holographic dark energy in the DGP model | Latex, 12 pages, 4 figures; Submitted to Phys. Lett. B | null | 10.1140/epjc/s10052-012-2162-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The braneworld model proposed by Dvali, Gabadadze and Porrati leads to an
accelerated universe without cosmological constant or other form of dark
energy. Nevertheless, we have investigated the consequences of this model when
an holo- graphic dark energy is included, taken the Hubble scale as IR cutoff.
We have found... | [
{
"created": "Fri, 9 Sep 2011 18:49:58 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Cruz",
"Norman",
""
],
[
"Lepe",
"Samuel",
""
],
[
"Peña",
"Francisco",
""
]
] | The braneworld model proposed by Dvali, Gabadadze and Porrati leads to an accelerated universe without cosmological constant or other form of dark energy. Nevertheless, we have investigated the consequences of this model when an holo- graphic dark energy is included, taken the Hubble scale as IR cutoff. We have found t... |
1604.04837 | Shahab Shahidi | Zahra Haghani, Tiberiu Harko, Hamid Reza Sepangi and Shahab Shahidi | Vector dark energy models with quadratic terms in the Maxwell tensor
derivatives | 22 pages, 18 figures | Eur. Phys. J. C (2017) 77: 137 | 10.1140/epjc/s10052-017-4697-9 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a vector-tensor gravitational model with terms quadratic in the
Maxwell tensor derivatives, called the Bopp-Podolsky term. The gravitational
field equations of the model and the equations describing the evolution of the
vector field are obtained and their Newtonian limit is investigated. The
cosmological ... | [
{
"created": "Sun, 17 Apr 2016 07:30:24 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Jul 2016 19:40:48 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Feb 2017 07:24:35 GMT",
"version": "v3"
}
] | 2017-08-09 | [
[
"Haghani",
"Zahra",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Sepangi",
"Hamid Reza",
""
],
[
"Shahidi",
"Shahab",
""
]
] | We consider a vector-tensor gravitational model with terms quadratic in the Maxwell tensor derivatives, called the Bopp-Podolsky term. The gravitational field equations of the model and the equations describing the evolution of the vector field are obtained and their Newtonian limit is investigated. The cosmological im... |
gr-qc/0608042 | Wu Ning | Ning Wu | Equation of Motion of a Spinning Test Particle in Gravitational Field | 10 pages | Commun.Theor.Phys.49:129-132,2008 | 10.1088/0253-6102/49/1/29 | null | gr-qc | null | Based on the coupling between the spin of a particle and
gravitoelectromagnetic field, the equation of motion of a spinning test
particle in gravitational field is deduced. From this equation of motion, it is
found that the motion of a spinning particle deviates from the geodesic
trajectory, and this deviation origin... | [
{
"created": "Tue, 8 Aug 2006 14:43:24 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Wu",
"Ning",
""
]
] | Based on the coupling between the spin of a particle and gravitoelectromagnetic field, the equation of motion of a spinning test particle in gravitational field is deduced. From this equation of motion, it is found that the motion of a spinning particle deviates from the geodesic trajectory, and this deviation originat... |
1110.1816 | Eugen Radu | Yves Brihaye, Eugen Radu and D. H. Tchrakian | An instability of the Reissner-Nordstrom solution and new hairy black
holes in d=5 dimensions | 14 pages, 6 figures | null | 10.1103/PhysRevD.85.044041 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The d=5 Reissner-Nordstrom black hole becomes unstable when considered as a
solution of Einstein--Yang-Mills--Chern-Simons theory. The existence of a
marginally stable mode gives rise to a new branch of black holes with
non-Abelian magnetic fields outside the horizon. These solutions carry a
nonzero electric charge a... | [
{
"created": "Sun, 9 Oct 2011 10:33:21 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Nov 2011 09:49:43 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Brihaye",
"Yves",
""
],
[
"Radu",
"Eugen",
""
],
[
"Tchrakian",
"D. H.",
""
]
] | The d=5 Reissner-Nordstrom black hole becomes unstable when considered as a solution of Einstein--Yang-Mills--Chern-Simons theory. The existence of a marginally stable mode gives rise to a new branch of black holes with non-Abelian magnetic fields outside the horizon. These solutions carry a nonzero electric charge and... |
0804.4112 | Patrick Connell J | Patrick Connell and Valeri P. Frolov | Ray-tracing in four and higher dimensional black holes: An analytical
approximation | 12 pages, 11 figures, text added to the figures along the abscissa
and ordinate axes, typing errors corrected, some new text added in the main
text also. Accepted for publication in Physical Review D | Phys.Rev.D78:024032,2008 | 10.1103/PhysRevD.78.024032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study null rays propagation in a spacetime of static
Schwarzschild--Tangherlini black holes in arbitrary number of dimensions. We
focus on the bending angle and the retarded time delay for rays emitted in the
vicinity of a black hole and propagating to the infinity. We obtain an analytic
expression in terms of ele... | [
{
"created": "Fri, 25 Apr 2008 14:06:02 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Jun 2008 17:25:36 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Connell",
"Patrick",
""
],
[
"Frolov",
"Valeri P.",
""
]
] | We study null rays propagation in a spacetime of static Schwarzschild--Tangherlini black holes in arbitrary number of dimensions. We focus on the bending angle and the retarded time delay for rays emitted in the vicinity of a black hole and propagating to the infinity. We obtain an analytic expression in terms of eleme... |
2209.14124 | Keisuke Izumi | Keisuke Izumi, Yoshimune Tomikawa, Tetsuya Shiromizu, Hirotaka Yoshino | Attractive gravity probe surfaces in higher dimensions | 23pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A generalization of the Riemannian Penrose inequality in $n$-dimensional
space ($3\le n<8$) is done. We introduce a parameter $\alpha$
($-\frac{1}{n-1}<\alpha < \infty$) indicating the strength of the gravitational
field, and define a refined attractive gravity probe surface (refined AGPS)
with $\alpha$. Then, we sho... | [
{
"created": "Wed, 28 Sep 2022 14:22:13 GMT",
"version": "v1"
}
] | 2022-09-29 | [
[
"Izumi",
"Keisuke",
""
],
[
"Tomikawa",
"Yoshimune",
""
],
[
"Shiromizu",
"Tetsuya",
""
],
[
"Yoshino",
"Hirotaka",
""
]
] | A generalization of the Riemannian Penrose inequality in $n$-dimensional space ($3\le n<8$) is done. We introduce a parameter $\alpha$ ($-\frac{1}{n-1}<\alpha < \infty$) indicating the strength of the gravitational field, and define a refined attractive gravity probe surface (refined AGPS) with $\alpha$. Then, we show ... |
gr-qc/0407106 | Edwin J. Son | Won Tae Kim, Edwin J. Son, and Myung Seok Yoon | Exactly Soluble Quantum Wormhole in Two Dimensions | v1. 13 pages, 1 figure, REVTeX3; v2. 1 Ref. added, REVTeX4, to appear
in Phys. Rev. D | Phys.Rev. D70 (2004) 104020 | 10.1103/PhysRevD.70.104020 | null | gr-qc hep-th | null | We are presenting a quantum traversable wormhole in an exactly soluble
two-dimensional model. This is different from previous works since the exotic
negative energy that supports the wormhole is generated from the quantization
of classical energy-momentum tensors. This explicit illustration shows the
quantum-mechanic... | [
{
"created": "Wed, 28 Jul 2004 02:59:54 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Nov 2004 05:10:22 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kim",
"Won Tae",
""
],
[
"Son",
"Edwin J.",
""
],
[
"Yoon",
"Myung Seok",
""
]
] | We are presenting a quantum traversable wormhole in an exactly soluble two-dimensional model. This is different from previous works since the exotic negative energy that supports the wormhole is generated from the quantization of classical energy-momentum tensors. This explicit illustration shows the quantum-mechanical... |
gr-qc/0507066 | Luis Nunez A | J. Carot (UIB Spain) and L. A. Nunez (ULA Venezuela) | Hydrodynamics in Class B Warped Spacetimes | 13 pages revtex 4 | Phys.Rev. D72 (2005) 084005 | 10.1103/PhysRevD.72.084005 | null | gr-qc | null | We discuss certain general features of type B warped spacetimes which have
important consequences on the material content they may admit and its
associated dynamics. We show that, for Warped B spacetimes, if shear and
anisotropy are nonvanishing, they have to be proportional. We also study some
of the physics related... | [
{
"created": "Fri, 15 Jul 2005 19:09:41 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Carot",
"J.",
"",
"UIB Spain"
],
[
"Nunez",
"L. A.",
"",
"ULA Venezuela"
]
] | We discuss certain general features of type B warped spacetimes which have important consequences on the material content they may admit and its associated dynamics. We show that, for Warped B spacetimes, if shear and anisotropy are nonvanishing, they have to be proportional. We also study some of the physics related t... |
1106.2254 | Daniela Alic | Daniela Alic, Carles Bona-Casas, Carles Bona, Luciano Rezzolla, Carlos
Palenzuela | Conformal and covariant formulation of the Z4 system with
constraint-violation damping | 12 pages, 7 figures. Version matching the one in press on PRD | Phys.Rev.D85:064040,2012 | 10.1103/PhysRevD.85.064040 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new formulation of the Einstein equations based on a conformal
and traceless decomposition of the covariant form of the Z4 system. This
formulation combines the advantages of a conformal decomposition, such as the
one used in the BSSNOK formulation (i.e. well-tested hyperbolic gauges, no need
for excisio... | [
{
"created": "Sat, 11 Jun 2011 17:07:02 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Mar 2012 22:10:14 GMT",
"version": "v2"
}
] | 2012-07-11 | [
[
"Alic",
"Daniela",
""
],
[
"Bona-Casas",
"Carles",
""
],
[
"Bona",
"Carles",
""
],
[
"Rezzolla",
"Luciano",
""
],
[
"Palenzuela",
"Carlos",
""
]
] | We present a new formulation of the Einstein equations based on a conformal and traceless decomposition of the covariant form of the Z4 system. This formulation combines the advantages of a conformal decomposition, such as the one used in the BSSNOK formulation (i.e. well-tested hyperbolic gauges, no need for excision,... |
2101.06320 | Marcos Leopoldo Wayhs Basso | Marcos L. W. Basso and Jonas Maziero | Interferometric Visibility in Curved Spacetimes | 11 pages, 6 figures. arXiv admin note: substantial text overlap with
arXiv:2011.00736, arXiv:2102.09623 | Class. Quantum Grav. 38 135007, 2021 | 10.1088/1361-6382/abfd84 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In [M. Zych et al., Nat. Commun. 2, 505 (2011)], the authors predicted that
the interferometric visibility is affected by a gravitational field in way that
cannot be explained without the general relativistic notion of proper time. In
this work, we take a different route and start deriving the same effect using
the u... | [
{
"created": "Fri, 15 Jan 2021 22:56:49 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Feb 2021 23:10:23 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Jun 2021 19:31:02 GMT",
"version": "v3"
}
] | 2021-06-03 | [
[
"Basso",
"Marcos L. W.",
""
],
[
"Maziero",
"Jonas",
""
]
] | In [M. Zych et al., Nat. Commun. 2, 505 (2011)], the authors predicted that the interferometric visibility is affected by a gravitational field in way that cannot be explained without the general relativistic notion of proper time. In this work, we take a different route and start deriving the same effect using the uni... |
gr-qc/0507109 | Maria Emilia Guimaraes | M. Leineker Costa (IF/UnB), A. L. Naves de Oliveira (DF/UEL) and M. E.
X. Guimaraes (MAT/UnB) | Contributions from Dilatonic Strings to the Flat Behaviour of the
Rotational Curves in Galaxies | This version to be published in the Int. Journal of Modern Phys. D | Int.J.Mod.Phys. D15 (2006) 387-394 | 10.1142/S0218271806007924 | null | gr-qc astro-ph hep-th | null | We analyse the flat behaviour of the rotational curves in some galaxies in
the framework of a dilatonic, current-carrying string. We determine the
expression of the tangential velocity of test objects following a stable
circular equatorial orbit in this spacetime.
| [
{
"created": "Tue, 26 Jul 2005 09:56:28 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Dec 2005 09:00:56 GMT",
"version": "v2"
}
] | 2017-01-04 | [
[
"Costa",
"M. Leineker",
"",
"IF/UnB"
],
[
"de Oliveira",
"A. L. Naves",
"",
"DF/UEL"
],
[
"Guimaraes",
"M. E. X.",
"",
"MAT/UnB"
]
] | We analyse the flat behaviour of the rotational curves in some galaxies in the framework of a dilatonic, current-carrying string. We determine the expression of the tangential velocity of test objects following a stable circular equatorial orbit in this spacetime. |
0802.4277 | Hiroyuki Nakano | Carlos O. Lousto, Hiroyuki Nakano (RIT) | A new method to integrate (2+1)-wave equations with Dirac's delta
functions as sources | 18 pages, 6 figures, Some comments added | Class.Quant.Grav.25:145018,2008 | 10.1088/0264-9381/25/14/145018 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Unlike in the Schwarzschild black hole background, gravitational
perturbations in a Kerr black hole background can not be decomposed into simple
tensor harmonics in the time domain. Here, we make mode decompositions only in
the azimuthal direction. As a first step, we discuss the resulting
(2+1)-dimensional Klein-Gor... | [
{
"created": "Thu, 28 Feb 2008 20:19:13 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Apr 2008 21:37:59 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Lousto",
"Carlos O.",
"",
"RIT"
],
[
"Nakano",
"Hiroyuki",
"",
"RIT"
]
] | Unlike in the Schwarzschild black hole background, gravitational perturbations in a Kerr black hole background can not be decomposed into simple tensor harmonics in the time domain. Here, we make mode decompositions only in the azimuthal direction. As a first step, we discuss the resulting (2+1)-dimensional Klein-Gordo... |
gr-qc/0503067 | B. L. Hu | B. L. Hu | Can Spacetime be a Condensate? | 12 pages Latex. Added some references and footnotes pertaining to
work of authors on related themes | Int.J.Theor.Phys. 44 (2005) 1785-1806 | 10.1007/s10773-005-8895-0 | null | gr-qc | null | We explore further the proposal that general relativity is the hydrodynamic
limit of some fundamental theories of the microscopic structure of spacetime
and matter, i.e., spacetime described by a differentiable manifold is an
emergent entity and the metric or connection forms are collective variables
valid only at th... | [
{
"created": "Wed, 16 Mar 2005 03:44:50 GMT",
"version": "v1"
},
{
"created": "Sat, 21 May 2005 21:12:26 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Hu",
"B. L.",
""
]
] | We explore further the proposal that general relativity is the hydrodynamic limit of some fundamental theories of the microscopic structure of spacetime and matter, i.e., spacetime described by a differentiable manifold is an emergent entity and the metric or connection forms are collective variables valid only at the ... |
2306.10605 | Konstantin Osetrin | Konstantin Osetrin and Ilya Kirnos and Evgeny Osetrin | An exact model of a gravitational wave in the Bianchi III universe based
on Shapovalov II wave spacetime and the quadratic theory of gravity | 18 pages | Universe, 2023, Volume 9, Issue 8, 356 | 10.3390/universe9080356 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Exact models of primordial gravitational waves in the Bianchi type III
universe are constructed on the basis of the quadratic theory of gravity with a
scalar field and pure radiation in Shapovalov wave spacetimes of type II
(subtype 2). Exact solutions of field equations and scalar equation are
obtained. The characte... | [
{
"created": "Sun, 18 Jun 2023 17:44:08 GMT",
"version": "v1"
}
] | 2023-08-02 | [
[
"Osetrin",
"Konstantin",
""
],
[
"Kirnos",
"Ilya",
""
],
[
"Osetrin",
"Evgeny",
""
]
] | Exact models of primordial gravitational waves in the Bianchi type III universe are constructed on the basis of the quadratic theory of gravity with a scalar field and pure radiation in Shapovalov wave spacetimes of type II (subtype 2). Exact solutions of field equations and scalar equation are obtained. The characteri... |
1812.04976 | Cl\'audio Gomes | Cl\'audio Gomes and Orfeu Bertolami | Nonminimally coupled Weyl gravity | 12 pages | null | 10.1088/1361-6382/ab52b9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Weyl gravity in the presence of a non-minimal matter-curvature coupling is
presented. Some properties arising from the non-metricity give rise to a second
order theory whose vacuum is compatible with a cosmological constant, under
conditions on the vector field.
| [
{
"created": "Wed, 12 Dec 2018 14:44:52 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Gomes",
"Cláudio",
""
],
[
"Bertolami",
"Orfeu",
""
]
] | Weyl gravity in the presence of a non-minimal matter-curvature coupling is presented. Some properties arising from the non-metricity give rise to a second order theory whose vacuum is compatible with a cosmological constant, under conditions on the vector field. |
1710.09719 | Pardyumn Kumar Sahoo | P.K. Sahoo, S.K. Tripathy, Parbati Sahoo | A periodic varying deceleration parameter in $f(R,T)$ gravity | 19 pages, 14 figures, Accepted version in MPLA | Modern Physics Letters A, 33 (2018) 1850193 | 10.1142/S0217732318501936 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The phenomenon of accelerated expansion of the present universe and a cosmic
transit aspect is explored in the framework of a modified gravity theory known
as $f(R,T)$ gravity (where $R$ is the Ricci scalar and $T$ is the trace of the
energy momentum tensor of the matter content). The cosmic transit phenomenon
signif... | [
{
"created": "Wed, 25 Oct 2017 09:45:55 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Jul 2018 04:34:31 GMT",
"version": "v2"
},
{
"created": "Mon, 3 Sep 2018 05:16:16 GMT",
"version": "v3"
}
] | 2018-09-28 | [
[
"Sahoo",
"P. K.",
""
],
[
"Tripathy",
"S. K.",
""
],
[
"Sahoo",
"Parbati",
""
]
] | The phenomenon of accelerated expansion of the present universe and a cosmic transit aspect is explored in the framework of a modified gravity theory known as $f(R,T)$ gravity (where $R$ is the Ricci scalar and $T$ is the trace of the energy momentum tensor of the matter content). The cosmic transit phenomenon signifie... |
0909.5364 | Simen Braeck | O. Gron, S. Braeck | The twin paradox in a cosmological context | 15 pages, 2 figures, revised and extended | Eur. Phys. J. Plus (2011) 126: 79 | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently Abramowicz and Bajtlik [ArXiv: 0905.2428 (2009)] have studied the
twin paradox in Schwarzschild spacetime. Considering circular motion they
showed that the twin with a non-vanishing 4-acceleration is older than his
brother at the reunion and argued that in spaces that are asymptotically
Minkowskian there exi... | [
{
"created": "Tue, 29 Sep 2009 15:42:44 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Nov 2009 15:55:37 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Jan 2010 13:49:36 GMT",
"version": "v3"
},
{
"created": "Tue, 20 Sep 2011 09:20:21 GMT",
"version": "v4"
}
] | 2011-09-21 | [
[
"Gron",
"O.",
""
],
[
"Braeck",
"S.",
""
]
] | Recently Abramowicz and Bajtlik [ArXiv: 0905.2428 (2009)] have studied the twin paradox in Schwarzschild spacetime. Considering circular motion they showed that the twin with a non-vanishing 4-acceleration is older than his brother at the reunion and argued that in spaces that are asymptotically Minkowskian there exist... |
gr-qc/0505074 | Luis Herrera | L. Herrera and N.O. Santos | A general relativistic effect in quasi-spherical objects as the possible
origin of relativistic jets | 7 pages Latex. Discussion section enlarged. Reference added. To
appear in Astr.Space.Sci | Astrophys.Space Sci.310:251-254,2007 | 10.1007/s10509-007-9509-5 | null | gr-qc astro-ph physics.space-ph | null | Based on recently reported results, we present arguments that sign changes in
proper acceleration of test particles on the symmetry axis and close to the
r=2M surface of quasi-spherical objects - related to the quadrupole moment of
the source - might be at the origin of relativistic jets of quasars and
micro-quasars.... | [
{
"created": "Sun, 15 May 2005 21:04:42 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Apr 2007 15:04:29 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Herrera",
"L.",
""
],
[
"Santos",
"N. O.",
""
]
] | Based on recently reported results, we present arguments that sign changes in proper acceleration of test particles on the symmetry axis and close to the r=2M surface of quasi-spherical objects - related to the quadrupole moment of the source - might be at the origin of relativistic jets of quasars and micro-quasars. |
1211.4992 | German Sharov | O. A. Grigorieva, G. S. Sharov | Multidimensional gravitational model with anisotropic pressure | 9 pages, 6 figures | International Journal of Modern Physics D. Vol. 22, No. 13 (2013)
1350075 | 10.1142/S0218271813500752 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the gravitational model with additional spatial dimensions and
anisotropic pressure which is nonzero only in these dimensions. Cosmological
solutions in this model include accelerated expansion of the Universe at late
age of its evolution and dynamical compactification of extra dimensions. This
model desc... | [
{
"created": "Wed, 21 Nov 2012 10:56:02 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Jan 2013 09:21:57 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Feb 2014 09:16:59 GMT",
"version": "v3"
}
] | 2014-02-19 | [
[
"Grigorieva",
"O. A.",
""
],
[
"Sharov",
"G. S.",
""
]
] | We consider the gravitational model with additional spatial dimensions and anisotropic pressure which is nonzero only in these dimensions. Cosmological solutions in this model include accelerated expansion of the Universe at late age of its evolution and dynamical compactification of extra dimensions. This model descri... |
1807.09402 | Lionel Philippoz | Lionel Philippoz and Adrian Bo\^itier and Philippe Jetzer | Gravitational wave polarization from combined Earth-space detectors | 29 pages, 19 figures. Accepted for publication in Phys. Rev. D | Phys. Rev. D 98, 044025 (2018) | 10.1103/PhysRevD.98.044025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the sensitivity to additional gravitational
wave polarization modes of future detectors. We first look at the upcoming
Einstein Telescope and its combination with existing or planned Earth-based
detectors in the case of a stochastic gravitational wave background. We then
study its correl... | [
{
"created": "Wed, 25 Jul 2018 00:47:07 GMT",
"version": "v1"
}
] | 2018-08-20 | [
[
"Philippoz",
"Lionel",
""
],
[
"Boîtier",
"Adrian",
""
],
[
"Jetzer",
"Philippe",
""
]
] | In this paper, we investigate the sensitivity to additional gravitational wave polarization modes of future detectors. We first look at the upcoming Einstein Telescope and its combination with existing or planned Earth-based detectors in the case of a stochastic gravitational wave background. We then study its correlat... |
1207.0670 | Thomas Sotiriou | Stefano Liberati, Luca Maccione, Thomas P. Sotiriou | Scale hierarchy in Horava-Lifshitz gravity: a strong constraint from
synchrotron radiation in the Crab nebula | 4 page, 2 figures; v2: minor changes to match published version | Phys.Rev.Lett. 109 (2012) 151602 | 10.1103/PhysRevLett.109.151602 | LMU-ASC 45/12; MPP-2012-109 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Horava-Lifshitz gravity models contain higher order operators suppressed by a
characteristic scale, which is required to be parametrically smaller than the
Planck scale. We show that recomputed synchrotron radiation constraints from
the Crab nebula suffice to exclude the possibility that this scale is of the
same ord... | [
{
"created": "Tue, 3 Jul 2012 13:32:35 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Dec 2012 16:08:01 GMT",
"version": "v2"
}
] | 2015-03-20 | [
[
"Liberati",
"Stefano",
""
],
[
"Maccione",
"Luca",
""
],
[
"Sotiriou",
"Thomas P.",
""
]
] | Horava-Lifshitz gravity models contain higher order operators suppressed by a characteristic scale, which is required to be parametrically smaller than the Planck scale. We show that recomputed synchrotron radiation constraints from the Crab nebula suffice to exclude the possibility that this scale is of the same order... |
1102.3706 | Sarah Vigeland | Sarah Vigeland, Nicol\'as Yunes, Leo Stein | Bumpy Black Holes in Alternate Theories of Gravity | 17 pages, replaced with version published in Phys. Rev. D | Phys.Rev.D83:104027,2011 | 10.1103/PhysRevD.83.104027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize the bumpy black hole framework to allow for alternative theory
deformations. We construct two model-independent parametric deviations from the
Kerr metric: one built from a generalization of the quasi-Kerr and bumpy
metrics and one built directly from perturbations of the Kerr spacetime in
Lewis-Papapet... | [
{
"created": "Thu, 17 Feb 2011 21:43:02 GMT",
"version": "v1"
},
{
"created": "Thu, 19 May 2011 21:36:18 GMT",
"version": "v2"
}
] | 2011-05-25 | [
[
"Vigeland",
"Sarah",
""
],
[
"Yunes",
"Nicolás",
""
],
[
"Stein",
"Leo",
""
]
] | We generalize the bumpy black hole framework to allow for alternative theory deformations. We construct two model-independent parametric deviations from the Kerr metric: one built from a generalization of the quasi-Kerr and bumpy metrics and one built directly from perturbations of the Kerr spacetime in Lewis-Papapetro... |
gr-qc/0510059 | Lorenzo Iorio | Lorenzo Iorio | How the orbital period of a test particle is modified by the
Dvali-Gabadadze-Porrati gravity? | LaTex, 7 pages, 13 references, no tables, no figures. Section 2.3
added. To appear in JCAP | JCAP 0601 (2006) 008 | 10.1088/1475-7516/2006/01/008 | null | gr-qc astro-ph hep-ph hep-th physics.space-ph | null | In addition to the pericentre \omega, the mean anomaly M and, thus, the mean
longitude \lambda, also the orbital period Pb and the mean motion $n$ of a test
particle are modified by the Dvali-Gabadadze-Porrati gravity. While the
correction to Pb depends on the mass of the central body and on the geometrical
features ... | [
{
"created": "Wed, 12 Oct 2005 11:42:02 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Nov 2005 16:47:25 GMT",
"version": "v2"
},
{
"created": "Mon, 19 Dec 2005 12:45:13 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Iorio",
"Lorenzo",
""
]
] | In addition to the pericentre \omega, the mean anomaly M and, thus, the mean longitude \lambda, also the orbital period Pb and the mean motion $n$ of a test particle are modified by the Dvali-Gabadadze-Porrati gravity. While the correction to Pb depends on the mass of the central body and on the geometrical features of... |
2011.03340 | Hrishikesh Patel | Robert B. Mann, Idrus Husin, Hrishikesh Patel, Mir Faizal, Anto
Sulaksono, Agus Suroso | Testing Short Distance Anisotropy in Space | 15 pages, 1 figure | Sci. Rep. 11, 1, 7474 (2021) | 10.1038/s41598-021-86355-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The isotropy of space is not a logical requirement but rather is an empirical
question; indeed there is suggestive evidence that universe might be
anisotropic. A plausible source of these anisotropies could be quantum gravity
corrections. If these corrections happen to be between the electroweak scale
and the Planck ... | [
{
"created": "Thu, 5 Nov 2020 18:05:58 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Jul 2021 20:15:30 GMT",
"version": "v2"
}
] | 2021-07-07 | [
[
"Mann",
"Robert B.",
""
],
[
"Husin",
"Idrus",
""
],
[
"Patel",
"Hrishikesh",
""
],
[
"Faizal",
"Mir",
""
],
[
"Sulaksono",
"Anto",
""
],
[
"Suroso",
"Agus",
""
]
] | The isotropy of space is not a logical requirement but rather is an empirical question; indeed there is suggestive evidence that universe might be anisotropic. A plausible source of these anisotropies could be quantum gravity corrections. If these corrections happen to be between the electroweak scale and the Planck sc... |
1711.02627 | Alex Bernardini Dr. | Alex E. Bernardini, Pedro Leal and Orfeu Bertolami | Quantum to classical transition in the Ho\v{r}ava-Lifshitz quantum
cosmology | 43 pages, 9 figures | null | 10.1088/1475-7516/2018/02/025 | null | gr-qc astro-ph.CO quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A quasi-Gaussian quantum superposition of Ho\v{r}ava-Lifshitz (HL) stationary
states is built in order to describe the transition of the quantum cosmological
problem to the related classical dynamics. The obtained HL phase-space
superposed Wigner function and its associated Wigner currents describe the
conditions for... | [
{
"created": "Tue, 7 Nov 2017 17:44:41 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Feb 2018 20:26:53 GMT",
"version": "v2"
}
] | 2018-02-28 | [
[
"Bernardini",
"Alex E.",
""
],
[
"Leal",
"Pedro",
""
],
[
"Bertolami",
"Orfeu",
""
]
] | A quasi-Gaussian quantum superposition of Ho\v{r}ava-Lifshitz (HL) stationary states is built in order to describe the transition of the quantum cosmological problem to the related classical dynamics. The obtained HL phase-space superposed Wigner function and its associated Wigner currents describe the conditions for t... |
gr-qc/9908037 | Carmen Molina-Paris | Carmen Molina-Paris, Paul R. Anderson, and Stephen A. Ramsey | One-loop $\lambda \phi^4$ theory in Robertson-Walker spacetimes:
adiabatic regularization and analytic approximation | 12 pages in revtex, and no figures | null | 10.1103/PhysRevD.61.127501 | LA-UR-99-44441 | gr-qc | null | The renormalization of a scalar field theory with a quartic self-coupling (a
$\lambda \phi^4$ theory) via adiabatic regularization in a general
Robertson-Walker spacetime is discussed. The adiabatic counterterms are
presented in a way that is most conducive to numerical computations. A
variation of the adiabatic regu... | [
{
"created": "Wed, 11 Aug 1999 15:06:15 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Molina-Paris",
"Carmen",
""
],
[
"Anderson",
"Paul R.",
""
],
[
"Ramsey",
"Stephen A.",
""
]
] | The renormalization of a scalar field theory with a quartic self-coupling (a $\lambda \phi^4$ theory) via adiabatic regularization in a general Robertson-Walker spacetime is discussed. The adiabatic counterterms are presented in a way that is most conducive to numerical computations. A variation of the adiabatic regula... |
gr-qc/9801060 | Shahar Hod | Shahar Hod and Tsvi Piran | Late-Time Evolution of Charged Gravitational Collapse and Decay of
Charged Scalar Hair - III. Nonlinear Analysis | 16 pages, 4 ps figures, RevTex, The figures are included in the text | Phys.Rev. D58 (1998) 024019 | 10.1103/PhysRevD.58.024019 | null | gr-qc | null | We study the nonlinear gravitational collapse of a charged massless
scalar-field. We confirm the existence of oscillatory inverse power-law tails
along future timelike infinity, future null infinity and along the future
outer-horizon. The nonlinear dumping exponents are in excellent agreement with
the analytically pr... | [
{
"created": "Sun, 18 Jan 1998 18:46:20 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Jan 1998 13:29:55 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Hod",
"Shahar",
""
],
[
"Piran",
"Tsvi",
""
]
] | We study the nonlinear gravitational collapse of a charged massless scalar-field. We confirm the existence of oscillatory inverse power-law tails along future timelike infinity, future null infinity and along the future outer-horizon. The nonlinear dumping exponents are in excellent agreement with the analytically pred... |
gr-qc/0604021 | Gustavo Dotti | Reinaldo J. Gleiser and Gustavo Dotti | Instability of the negative mass Schwarzschild naked singularity | 15 pages | Class.Quant.Grav. 23 (2006) 5063-5078 | 10.1088/0264-9381/23/15/021 | null | gr-qc | null | We study the negative mass Schwarzschild spacetime, which has a naked
singularity, and show that it is perturbatively unstable. This is achieved by
first introducing a modification of the well known Regge - Wheeler - Zerilli
approach to black hole perturbations to allow for the presence of a
``kinematic'' singularity... | [
{
"created": "Wed, 5 Apr 2006 18:46:34 GMT",
"version": "v1"
},
{
"created": "Mon, 29 May 2006 17:13:19 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Gleiser",
"Reinaldo J.",
""
],
[
"Dotti",
"Gustavo",
""
]
] | We study the negative mass Schwarzschild spacetime, which has a naked singularity, and show that it is perturbatively unstable. This is achieved by first introducing a modification of the well known Regge - Wheeler - Zerilli approach to black hole perturbations to allow for the presence of a ``kinematic'' singularity t... |
1903.09646 | Mikica Kocic | Mikica Kocic, Anders Lundkvist and Francesco Torsello | On the ratio of lapses in bimetric relativity | the ancillary files contain the Mathematica notebooks and the main
paper with color-highlighted variables | null | 10.1088/1361-6382/ab497a | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The two lapse functions in the Hassan-Rosen bimetric theory are not
independent. Without knowing the relation between them, one cannot evolve the
equations in the 3+1 formalism. This work computes the ratio of lapses for the
spherically symmetric case, which is a prerequisite for numerical bimetric
relativity.
| [
{
"created": "Fri, 22 Mar 2019 18:00:01 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Kocic",
"Mikica",
""
],
[
"Lundkvist",
"Anders",
""
],
[
"Torsello",
"Francesco",
""
]
] | The two lapse functions in the Hassan-Rosen bimetric theory are not independent. Without knowing the relation between them, one cannot evolve the equations in the 3+1 formalism. This work computes the ratio of lapses for the spherically symmetric case, which is a prerequisite for numerical bimetric relativity. |
2204.02723 | Giuseppe Gaetano Luciano | Giuseppe Gaetano Luciano and Jaume Gine | Baryogenesis in non-extensive Tsallis Cosmology | 9 pages, 1 figure, 1 table | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Non-extensive Tsallis thermostatistics is a widespread paradigm to describe
large-scale gravitational systems. In this work we use Tsallis Cosmology to
study thermodynamic gravity and derive modified Friedmann equations. We show
that corrections induced by non-extensivity affect the Hubble function
evolution during t... | [
{
"created": "Wed, 6 Apr 2022 10:58:28 GMT",
"version": "v1"
}
] | 2022-04-07 | [
[
"Luciano",
"Giuseppe Gaetano",
""
],
[
"Gine",
"Jaume",
""
]
] | Non-extensive Tsallis thermostatistics is a widespread paradigm to describe large-scale gravitational systems. In this work we use Tsallis Cosmology to study thermodynamic gravity and derive modified Friedmann equations. We show that corrections induced by non-extensivity affect the Hubble function evolution during the... |
1604.02537 | Shuang Nan Zhang | Shuang-Nan Zhang, Yuan Liu, Shuxu Yi, Zigao Dai, and Chaoguang Huang | Do we expect to detect electromagnetic radiation from merging stellar
mass black binaries like GW150914? No | 4 pages, 2 figures, resubmitted to A&A after following the
suggestions of the editor | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Context: The LIGO consortium announced the first direct detection of
gravitation wave event GW150914 from two merging black holes; however the
nature of the black holes are still not clear.
Aims: We study whether electromagnetic radiation can be detected from merging
stellar mass black binaries like GW150914.
Met... | [
{
"created": "Sat, 9 Apr 2016 08:19:55 GMT",
"version": "v1"
},
{
"created": "Sun, 15 May 2016 13:26:05 GMT",
"version": "v2"
}
] | 2016-05-17 | [
[
"Zhang",
"Shuang-Nan",
""
],
[
"Liu",
"Yuan",
""
],
[
"Yi",
"Shuxu",
""
],
[
"Dai",
"Zigao",
""
],
[
"Huang",
"Chaoguang",
""
]
] | Context: The LIGO consortium announced the first direct detection of gravitation wave event GW150914 from two merging black holes; however the nature of the black holes are still not clear. Aims: We study whether electromagnetic radiation can be detected from merging stellar mass black binaries like GW150914. Methods: ... |
1004.3379 | Spiros Cotsakis | Ignatios Antoniadis, Spiros Cotsakis, Ifigeneia Klaoudatou | Brane singularities with a scalar field bulk | 16 pages, latex | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The singularity structure and the corresponding asymptotic behavior of a
3-brane coupled to a scalar field in a five dimensional bulk is analyzed in
full generality, using the method of asymptotic splittings. It is shown that
the collapse singularity at a finite distance from the brane can be avoided
only at the expe... | [
{
"created": "Tue, 20 Apr 2010 08:39:39 GMT",
"version": "v1"
}
] | 2010-04-21 | [
[
"Antoniadis",
"Ignatios",
""
],
[
"Cotsakis",
"Spiros",
""
],
[
"Klaoudatou",
"Ifigeneia",
""
]
] | The singularity structure and the corresponding asymptotic behavior of a 3-brane coupled to a scalar field in a five dimensional bulk is analyzed in full generality, using the method of asymptotic splittings. It is shown that the collapse singularity at a finite distance from the brane can be avoided only at the expens... |
2407.13557 | P. A. Gonzalez | P. A. Gonz\'alez, Eleftherios Papantonopoulos, Joaqu\'in Robledo,
Yerko V\'asquez | Nonlinear Scalarization of Schwarzschild Black Hole in Scalar-Torsion
Teleparallel Gravity | New version | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a scalar field coupled to the torsion in Teleparallel Gravity
with a coupling function that does not allow for a tachyonic instability to
occur, and it leads to the formation of new black holes with scalar hair. The
scalarized black hole solutions are asymptotically flat, and they are studied
under their ... | [
{
"created": "Thu, 18 Jul 2024 14:29:24 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Jul 2024 12:23:51 GMT",
"version": "v2"
}
] | 2024-08-01 | [
[
"González",
"P. A.",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Robledo",
"Joaquín",
""
],
[
"Vásquez",
"Yerko",
""
]
] | We consider a scalar field coupled to the torsion in Teleparallel Gravity with a coupling function that does not allow for a tachyonic instability to occur, and it leads to the formation of new black holes with scalar hair. The scalarized black hole solutions are asymptotically flat, and they are studied under their th... |
1704.02587 | Marco Mamone-Capria | Marco Mamone-Capria | On the Incompatibility of Special Relativity and Quantum Mechanics | A few misprints corrected. 28 pages. Keywords: EPR correlations,
Bohr-Einstein debate, neo-Lorentzian relativity, speed of causal influences,
causality reversal, Bayes' theorem | Journal for Foundations and Applications of Physics, 8(2), 163-89,
2018 | null | null | gr-qc physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some of the strategies which have been put forward in order to deal with the
inconsistency between quantum mechanics and special relativity are examined.
The EPR correlations are discussed as a simple example of quantum mechanical
macroscopic effects with spacelike separation from their causes. It is shown
that they ... | [
{
"created": "Sun, 9 Apr 2017 10:55:59 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Jun 2018 09:40:29 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Sep 2018 08:29:11 GMT",
"version": "v3"
}
] | 2018-09-06 | [
[
"Mamone-Capria",
"Marco",
""
]
] | Some of the strategies which have been put forward in order to deal with the inconsistency between quantum mechanics and special relativity are examined. The EPR correlations are discussed as a simple example of quantum mechanical macroscopic effects with spacelike separation from their causes. It is shown that they ca... |
2308.15117 | Aurelien Barrau | Aur\'elien Barrau, Baptiste Blachier, Maxime Lahlou, Andrew Liu,
Killian Martineau | Einstein vs Hawking: Black hole binaries and cosmological expansion | 16 pages, 14 figures | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This note aims at investigating two different situations where the classical
general relativistic dynamics competes with the evolution driven by Hawking
evaporation. We focus, in particular, on binary systems of black holes emitting
gravitational waves and gravitons, and on the cosmological evolution when black
holes... | [
{
"created": "Tue, 29 Aug 2023 08:33:07 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Nov 2023 10:46:02 GMT",
"version": "v2"
},
{
"created": "Mon, 13 Nov 2023 11:58:06 GMT",
"version": "v3"
},
{
"created": "Sat, 30 Dec 2023 09:34:20 GMT",
"version": "v4"
}
] | 2024-01-02 | [
[
"Barrau",
"Aurélien",
""
],
[
"Blachier",
"Baptiste",
""
],
[
"Lahlou",
"Maxime",
""
],
[
"Liu",
"Andrew",
""
],
[
"Martineau",
"Killian",
""
]
] | This note aims at investigating two different situations where the classical general relativistic dynamics competes with the evolution driven by Hawking evaporation. We focus, in particular, on binary systems of black holes emitting gravitational waves and gravitons, and on the cosmological evolution when black holes a... |
2107.12109 | Avi Vajpeyi | Avi Vajpeyi, Rory Smith, Eric Thrane, Gregory Ashton, Thomas Alford,
Sierra Garza, Maximiliano Isi, Jonah Kanner, T.J. Massinger, and Liting Xiao | A follow-up on intermediate-mass black hole candidates in the second
LIGO-Virgo observing run with the Bayes Coherence Ratio | 10 pages, 3 figures | Monthly Notices of the Royal Astronomical Society, Volume 516,
Issue 4, pp.5309-5317, November 2022 | 10.1093/mnras/stac2332 | null | gr-qc astro-ph.HE physics.data-an | http://creativecommons.org/licenses/by/4.0/ | The detection of an intermediate-mass black hole population ($10^2-10^6$
$M_{\odot}$) will provide clues to their formation environments (e.g., disks of
active galactic nuclei, globular clusters) and illuminate a potential pathway
to produce supermassive black holes. Ground-based gravitational-wave detectors
are sens... | [
{
"created": "Mon, 26 Jul 2021 11:03:16 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jul 2021 00:14:03 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Mar 2023 00:03:08 GMT",
"version": "v3"
}
] | 2023-03-06 | [
[
"Vajpeyi",
"Avi",
""
],
[
"Smith",
"Rory",
""
],
[
"Thrane",
"Eric",
""
],
[
"Ashton",
"Gregory",
""
],
[
"Alford",
"Thomas",
""
],
[
"Garza",
"Sierra",
""
],
[
"Isi",
"Maximiliano",
""
],
[
"Kanner... | The detection of an intermediate-mass black hole population ($10^2-10^6$ $M_{\odot}$) will provide clues to their formation environments (e.g., disks of active galactic nuclei, globular clusters) and illuminate a potential pathway to produce supermassive black holes. Ground-based gravitational-wave detectors are sensit... |
1412.5115 | Avirup Ghosh | Ayan Chatterjee, Avirup Ghosh | Quasilocal conformal Killing horizons: Classical phase space and the
first law | Typos corrected, results unchanged, accepted for publication in Phys.
Rev. D | Phys. Rev. D 91, 064054 (2015) | 10.1103/PhysRevD.91.064054 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In realistic situations, black hole spacetimes do not admit a global timelike
Killing vector field. However, it is possible to describe the horizon in a
quasilocal setting by introducing the notion of a quasilocal boundary with
certain properties which mimic the properties of a black hole horizon. Isolated
horzons an... | [
{
"created": "Tue, 16 Dec 2014 18:36:22 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Feb 2015 06:59:52 GMT",
"version": "v2"
}
] | 2015-03-24 | [
[
"Chatterjee",
"Ayan",
""
],
[
"Ghosh",
"Avirup",
""
]
] | In realistic situations, black hole spacetimes do not admit a global timelike Killing vector field. However, it is possible to describe the horizon in a quasilocal setting by introducing the notion of a quasilocal boundary with certain properties which mimic the properties of a black hole horizon. Isolated horzons and ... |
0808.3124 | Bennie F. L. Ward | B.F.L. Ward (Department of Physics, Baylor University, Waco, TX, USA) | Planck Scale Cosmology in Resummed Quantum Gravity | 7 pages, 1 figure | Mod.Phys.Lett.A23:3299-3305,2008 | 10.1142/S0217732308028624 | BU-HEPP-08-12 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that, by using resummation techniques based on the extension of the
methods of Yennie, Frautschi and Suura to Feynman's formulation of Einstein's
theory, we get quantum field theoretic predictions for the UV fixed-point
values of the dimensionless gravitational and cosmological constants.
Connections to the p... | [
{
"created": "Fri, 22 Aug 2008 19:58:17 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Aug 2008 17:24:33 GMT",
"version": "v2"
}
] | 2009-02-11 | [
[
"Ward",
"B. F. L.",
"",
"Department of Physics, Baylor University, Waco, TX, USA"
]
] | We show that, by using resummation techniques based on the extension of the methods of Yennie, Frautschi and Suura to Feynman's formulation of Einstein's theory, we get quantum field theoretic predictions for the UV fixed-point values of the dimensionless gravitational and cosmological constants. Connections to the phe... |
1201.1799 | Ilya Ovid'ko | I. A. Ovid'ko | Analogs of wave function reduction, quantum entanglement and EPR
experiment in classical physics of spacetimes with time machines | 18 pages, 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is theoretically revealed that, in classical physics of spacetimes with
wormholes, there are analogs of wave function reduction events, quantum
entanglement and Einstein-Podolsky-Rosen (EPR) experiment. Within the suggested
approach, wormholes are specified by a typical microscopic radius of their
mouths, and this... | [
{
"created": "Thu, 5 Jan 2012 09:29:32 GMT",
"version": "v1"
}
] | 2012-01-10 | [
[
"Ovid'ko",
"I. A.",
""
]
] | It is theoretically revealed that, in classical physics of spacetimes with wormholes, there are analogs of wave function reduction events, quantum entanglement and Einstein-Podolsky-Rosen (EPR) experiment. Within the suggested approach, wormholes are specified by a typical microscopic radius of their mouths, and this c... |
1812.04185 | Wen-Biao Han | Shuo Xin, Wen-Biao Han, Shu-Cheng Yang | Gravitational wave emission under general parametrized metric from
extreme mass ratio inspirals | 25 pages, 22 figures | Phys. Rev. D 100, 084055 (2019) | 10.1103/PhysRevD.100.084055 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Future space-borne interferometers will be able to detect gravitational waves
at $10^{-3}$ to $10^{-1}$ Hz. At this band extreme-mass-ratio inspirals (EMRIs)
can be promising gravitational wave sources. In this paper, we investigate
possibility of testing Kerr hypothesis against a parametrized non-Kerr metric
by matc... | [
{
"created": "Tue, 11 Dec 2018 02:06:20 GMT",
"version": "v1"
}
] | 2019-10-30 | [
[
"Xin",
"Shuo",
""
],
[
"Han",
"Wen-Biao",
""
],
[
"Yang",
"Shu-Cheng",
""
]
] | Future space-borne interferometers will be able to detect gravitational waves at $10^{-3}$ to $10^{-1}$ Hz. At this band extreme-mass-ratio inspirals (EMRIs) can be promising gravitational wave sources. In this paper, we investigate possibility of testing Kerr hypothesis against a parametrized non-Kerr metric by matchi... |
2111.00854 | Umananda Dev Goswami | Dhruba Jyoti Gogoi, Ronit Karmakar and Umananda Dev Goswami | Quasinormal Modes of Non-Linearly Charged Black Holes surrounded by a
Cloud of Strings in Rastall Gravity | 24 pages and 25 figures | International Journal of Geometric Methods in Modern Physics
(2022) | 10.1142/S021988782350007X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain the black hole solution for the Ay\'on - Beato - Garc\'ia (ABG)
type black hole surrounded by a cloud of strings in Rastall gravity and
calculate the scalar quasinormal modes of it for a massless scalar field. To
have a better visualization of the results, we also introduce a new non-linear
electrodynamic s... | [
{
"created": "Mon, 1 Nov 2021 11:44:04 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Sep 2022 03:48:42 GMT",
"version": "v2"
}
] | 2022-10-03 | [
[
"Gogoi",
"Dhruba Jyoti",
""
],
[
"Karmakar",
"Ronit",
""
],
[
"Goswami",
"Umananda Dev",
""
]
] | We obtain the black hole solution for the Ay\'on - Beato - Garc\'ia (ABG) type black hole surrounded by a cloud of strings in Rastall gravity and calculate the scalar quasinormal modes of it for a massless scalar field. To have a better visualization of the results, we also introduce a new non-linear electrodynamic sou... |
gr-qc/9409032 | Rafael Ferraro | S.C.Beluardi and Rafael Ferraro | Extrinsic Time in Quantum Cosmology | 14 pages (TeX manuscript). Revised and enlarged version | Phys.Rev. D52 (1995) 1963-1969 | 10.1103/PhysRevD.52.1963 | null | gr-qc | null | An extrinsic time is identified in most isotropic and homogeneous
cosmological models by matching them with the ideal clock - a parametrized
system whose only "degree of freedom" is time -. Once this matching is
established, the cosmological models are quantized in the same way as the ideal
clock. The space of soluti... | [
{
"created": "Wed, 14 Sep 1994 17:43:00 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Apr 1995 11:19:00 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Beluardi",
"S. C.",
""
],
[
"Ferraro",
"Rafael",
""
]
] | An extrinsic time is identified in most isotropic and homogeneous cosmological models by matching them with the ideal clock - a parametrized system whose only "degree of freedom" is time -. Once this matching is established, the cosmological models are quantized in the same way as the ideal clock. The space of solution... |
1507.08310 | Emilio Rub\'in de Celis | Emilio Rub\'in de Celis | Effect of a cylindrical thin-shell of matter on the electrostatic
self-force on a charge | (15 pages, 6 figures; the work had been extended, corrected and
reformulated from version v1 to v2, and minor misprints corrected from v2 to
v3) | Eur.Phys.J. C76 (2016) no.2, 92 | 10.1140/epjc/s10052-016-3939-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The electrostatic self-force on a point charge in cylindrical thin-shell
space-times is interpreted as the sum of a $bulk$ field and a $shell$ field.
The $bulk$ part corresponds to a field sourced by the test charge placed in a
space-time without the shell. The $shell$ field accounts for the discontinuity
of the extr... | [
{
"created": "Wed, 29 Jul 2015 20:41:40 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Dec 2015 01:45:56 GMT",
"version": "v2"
},
{
"created": "Sat, 2 Apr 2016 17:42:44 GMT",
"version": "v3"
}
] | 2016-04-05 | [
[
"de Celis",
"Emilio Rubín",
""
]
] | The electrostatic self-force on a point charge in cylindrical thin-shell space-times is interpreted as the sum of a $bulk$ field and a $shell$ field. The $bulk$ part corresponds to a field sourced by the test charge placed in a space-time without the shell. The $shell$ field accounts for the discontinuity of the extrin... |
gr-qc/9408030 | null | Marek Biesiada and Svend E. Rugh | Maupertuis principle, Wheeler's superspace and an invariant criterion
for local instability in general relativity | 30 pages, LaTeX | null | null | NCAC Preprint No. 273 | gr-qc | null | It is tempting to raise the issue of (metric) chaos in general relativity
since the Einstein equations are a set of highly nonlinear equations which may
exhibit dynamically very complicated solutions for the space-time metric.
However, in general relativity it is not easy to construct indicators of chaos
which are ga... | [
{
"created": "Thu, 25 Aug 1994 12:57:04 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Biesiada",
"Marek",
""
],
[
"Rugh",
"Svend E.",
""
]
] | It is tempting to raise the issue of (metric) chaos in general relativity since the Einstein equations are a set of highly nonlinear equations which may exhibit dynamically very complicated solutions for the space-time metric. However, in general relativity it is not easy to construct indicators of chaos which are gaug... |
1307.2229 | Tiberiu Harko | Zahra Haghani, Tiberiu Harko, Hamid Reza Sepangi, Shahab Shahidi | Weyl-Cartan-Weitzenb\"ock gravity through Lagrange multiplier | 13 pages, no figures; reference added; accepted for publication in
PRD | Phys. Rev. D 88, 044024 (2013) | 10.1103/PhysRevD.88.044024 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider an extension of the Weyl-Cartan-Weitzenb\"{o}ck (WCW) and
teleparallel gravity, in which the Weitzenb\"{o}ck condition of the exact
cancellation of curvature and torsion in a Weyl-Cartan geometry is inserted
into the gravitational action via a Lagrange multiplier. In the standard metric
formulation of the... | [
{
"created": "Sun, 7 Jul 2013 08:54:26 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Jul 2013 19:04:12 GMT",
"version": "v2"
}
] | 2013-08-14 | [
[
"Haghani",
"Zahra",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Sepangi",
"Hamid Reza",
""
],
[
"Shahidi",
"Shahab",
""
]
] | We consider an extension of the Weyl-Cartan-Weitzenb\"{o}ck (WCW) and teleparallel gravity, in which the Weitzenb\"{o}ck condition of the exact cancellation of curvature and torsion in a Weyl-Cartan geometry is inserted into the gravitational action via a Lagrange multiplier. In the standard metric formulation of the W... |
0905.1776 | Subenoy Chakraborty | Ritabrata Biswas, Subenoy Chakraborty | The geometry of the higher dimensional black hole thermodynamics in
Einstein-Gauss-Bonnet theory | 8 pages | Gen.Rel.Grav.42:1311-1322,2010 | 10.1007/s10714-009-0907-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper deals with five-dimensional black hole solutions in (a)
Einstein-Yang-Mills-Gauss-Bonnet theory and (b)Einstein-Maxwell-Gauss-Bonnet
theory with a cosmological constant for spherically symmetric space time. The
geometry of the black hole thermodynamics has been studied for both the black
holes.
| [
{
"created": "Tue, 12 May 2009 07:25:30 GMT",
"version": "v1"
}
] | 2010-04-30 | [
[
"Biswas",
"Ritabrata",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | This paper deals with five-dimensional black hole solutions in (a) Einstein-Yang-Mills-Gauss-Bonnet theory and (b)Einstein-Maxwell-Gauss-Bonnet theory with a cosmological constant for spherically symmetric space time. The geometry of the black hole thermodynamics has been studied for both the black holes. |
1111.1809 | Bibhas Majhi Ranjan | Bibhas Ranjan Majhi, T. Padmanabhan | Noether Current, Horizon Virasoro Algebra and Entropy | V2: to appear in Phys. Rev. D | Phys. Rev. D 85: 084040, 2012 | 10.1103/PhysRevD.85.084040 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a simple and straightforward procedure for defining a Virasoro
algebra based on the diffeomorphisms near a null surface in a spacetime and
obtain the entropy density of the null surface from its central charge. We use
the off-shell Noether current corresponding to the diffeomorphism invariance of
a gravita... | [
{
"created": "Tue, 8 Nov 2011 06:07:23 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Apr 2012 05:57:47 GMT",
"version": "v2"
}
] | 2012-04-30 | [
[
"Majhi",
"Bibhas Ranjan",
""
],
[
"Padmanabhan",
"T.",
""
]
] | We provide a simple and straightforward procedure for defining a Virasoro algebra based on the diffeomorphisms near a null surface in a spacetime and obtain the entropy density of the null surface from its central charge. We use the off-shell Noether current corresponding to the diffeomorphism invariance of a gravitati... |
2310.04319 | Noah Donald | Christopher D. Carone and Noah L. Donald | Towards a quantum field theory description of nonlocal spacetime defects | 23 pages, LaTeX, 8 figures | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose an ansatz for encoding the physics of nonlocal spacetime defects
in the Green's functions for a scalar field theory defined on a causal set.
This allows us to numerically study the effects of nonlocal spacetime defects
on the discrete Feynman propagator of the theory defined on the causal set in
1+1 dimens... | [
{
"created": "Fri, 6 Oct 2023 15:33:14 GMT",
"version": "v1"
}
] | 2023-10-09 | [
[
"Carone",
"Christopher D.",
""
],
[
"Donald",
"Noah L.",
""
]
] | We propose an ansatz for encoding the physics of nonlocal spacetime defects in the Green's functions for a scalar field theory defined on a causal set. This allows us to numerically study the effects of nonlocal spacetime defects on the discrete Feynman propagator of the theory defined on the causal set in 1+1 dimensio... |
2208.09839 | Vittorio De Falco Dr | Emmanuele Battista, Vittorio De Falco | First post-Newtonian $N$-body problem in Einstein-Cartan theory with the
Weyssenhoff fluid: equations of motion | Paper features: 13 pages; 1 figure; 67 references. Accepted on EPJ C
on the 20th of August 2022 | Eur. Phys. J. C (2022) 82:782 | 10.1140/epjc/s10052-022-10746-7 | null | gr-qc astro-ph.HE hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We derive the equations of motion for an $N$-body system in the
Einstein-Cartan gravity theory at the first post-Newtonian order by exploiting
the Weyssenhoff fluid as the spin model. Our approach consists in performing
the point-particle limit of the continuous description of the gravitational
source. The final equa... | [
{
"created": "Sun, 21 Aug 2022 08:23:12 GMT",
"version": "v1"
}
] | 2022-09-07 | [
[
"Battista",
"Emmanuele",
""
],
[
"De Falco",
"Vittorio",
""
]
] | We derive the equations of motion for an $N$-body system in the Einstein-Cartan gravity theory at the first post-Newtonian order by exploiting the Weyssenhoff fluid as the spin model. Our approach consists in performing the point-particle limit of the continuous description of the gravitational source. The final equati... |
2404.18119 | Antonio D'Alfonso Del Sordo | Christian G B\"ohmer, Antonio d'Alfonso del Sordo, Betti Hartmann,
Linus Elias M\"unch | Azimuthal geodesics in closed FLRW cosmologies II | 19 pages, 9 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study azimuthal geodesics in closed Friedmann-Lem\^aitre-Robertson-Walker
(FLRW) cosmological models and give the angular distance travelled by a test
particle moving along such a geodesic during one cycle of expansion and
re-collapse of the universe. We extend previous results regarding the path
followed by light... | [
{
"created": "Sun, 28 Apr 2024 08:56:26 GMT",
"version": "v1"
}
] | 2024-04-30 | [
[
"Böhmer",
"Christian G",
""
],
[
"del Sordo",
"Antonio d'Alfonso",
""
],
[
"Hartmann",
"Betti",
""
],
[
"Münch",
"Linus Elias",
""
]
] | We study azimuthal geodesics in closed Friedmann-Lem\^aitre-Robertson-Walker (FLRW) cosmological models and give the angular distance travelled by a test particle moving along such a geodesic during one cycle of expansion and re-collapse of the universe. We extend previous results regarding the path followed by light r... |
2310.16669 | Petr Kotla\v{r}\'ik | David Kofro\v{n}, Petr Kotla\v{r}\'ik, Old\v{r}ich Semer\'ak | Relativistic disks by Appell-ring convolutions | 20 pages, 4 figures, supplemental material is provided in the
ancillary Mathematica notebook "holeyMorganMorganDisks.nb" and the MX file
"holeyMorganMorganDisks.mx" | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present a new method for generating the gravitational field of thin disks
within the Weyl class of static and axially symmetric spacetimes. Such a
gravitational field is described by two metric functions: one satisfies the
Laplace equation and represents the gravitational potential, while the other is
determined b... | [
{
"created": "Wed, 25 Oct 2023 14:36:40 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Oct 2023 07:51:41 GMT",
"version": "v2"
}
] | 2023-10-27 | [
[
"Kofroň",
"David",
""
],
[
"Kotlařík",
"Petr",
""
],
[
"Semerák",
"Oldřich",
""
]
] | We present a new method for generating the gravitational field of thin disks within the Weyl class of static and axially symmetric spacetimes. Such a gravitational field is described by two metric functions: one satisfies the Laplace equation and represents the gravitational potential, while the other is determined by ... |
1509.04497 | Martin Bucher | Martin Bucher (APC, U. Paris 7/CNRS, Paris, France & University of
KwaZulu-Natal, Durban, South Africa) and Wei-Tou Ni (National Tsing Hua
University, Hsinchu, Taiwan) | General relativity and cosmology | 15 pages PDF, 4 figures, to appear as introductory chapter in "One
Hundred Years of General Relativity: From Genesis and Empirical Foundations
to Gravitational Waves, Cosmology and Quantum Gravity" | International Journal of Modern Physics D Vol. 24, No. 14 (2015)
1530030 (15 pages) | 10.1142/S021827181530030X | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This year marks the hundredth anniversary of Einstein's 1915 landmark paper
"Die Feldgleichungen der Gravitation" in which the field equations of general
relativity were correctly formulated for the first time, thus rendering general
relativity a complete theory. Over the subsequent hundred years physicists and
astro... | [
{
"created": "Tue, 15 Sep 2015 11:26:20 GMT",
"version": "v1"
}
] | 2016-02-03 | [
[
"Bucher",
"Martin",
"",
"APC, U. Paris 7/CNRS, Paris, France & University of\n KwaZulu-Natal, Durban, South Africa"
],
[
"Ni",
"Wei-Tou",
"",
"National Tsing Hua\n University, Hsinchu, Taiwan"
]
] | This year marks the hundredth anniversary of Einstein's 1915 landmark paper "Die Feldgleichungen der Gravitation" in which the field equations of general relativity were correctly formulated for the first time, thus rendering general relativity a complete theory. Over the subsequent hundred years physicists and astrono... |
0801.1547 | Theodore A. Jacobson | Ted Jacobson | Einstein-aether gravity: a status report | 18 pages, for the proceedings of the conference "From Quantum to
Emergent Gravity: Theory and Phenomenology", June 11-15 2007, SISSA; Trieste,
Italy; v.2: added brief comments on observability of wave speeds and
polarizations, and how neutron star and black hole "sensitivities" might be
computed | PoSQG-Ph:020,2007 | null | null | gr-qc astro-ph hep-ph hep-th | null | This paper reviews the theory, phenomenology, and observational constraints
on the coupling parameters of Einstein-aether gravity, i.e. General Relativity
coupled to a dynamical unit timelike vector field. A discussion of open
questions concerning both phenomenology and fundamental issues is included.
| [
{
"created": "Thu, 10 Jan 2008 06:51:29 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Mar 2008 16:26:11 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Jacobson",
"Ted",
""
]
] | This paper reviews the theory, phenomenology, and observational constraints on the coupling parameters of Einstein-aether gravity, i.e. General Relativity coupled to a dynamical unit timelike vector field. A discussion of open questions concerning both phenomenology and fundamental issues is included. |
gr-qc/0512008 | Tania Regimbau | T. Regimbau and J.A de Freitas Pacheco | Stochastic Background from Coalescences of NS-NS Binaries | 22 pages, 6 figures, accepted for publication in ApJ; formula 21 has
been corrected with respect to the published version | Astrophys.J.642:455-461,2006 | 10.1086/500190 | null | gr-qc astro-ph | null | In this work, numerical simulations were used to investigate the
gravitational stochastic background produced by coalescences occurring up to $z
\sim 5$ of double neutron star systems. The cosmic coalescence rate was derived
from Monte Carlo methods using the probability distributions for forming a
massive binary and... | [
{
"created": "Thu, 1 Dec 2005 11:23:29 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Jun 2006 08:28:47 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Regimbau",
"T.",
""
],
[
"Pacheco",
"J. A de Freitas",
""
]
] | In this work, numerical simulations were used to investigate the gravitational stochastic background produced by coalescences occurring up to $z \sim 5$ of double neutron star systems. The cosmic coalescence rate was derived from Monte Carlo methods using the probability distributions for forming a massive binary and t... |
2101.06909 | Shahar Hod | Shahar Hod | Fermat's principle in black-hole spacetimes | 5 pages. This essay received an Honorable Mention in the 2018 Essay
Competition of the Gravity Research Foundation | International Journal of Modern Physics D 27, 1847025 (2018) | 10.1142/S0218271818470259 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Black-hole spacetimes are known to possess closed light rings. We here
present a remarkably compact theorem which reveals the physically intriguing
fact that these unique null circular geodesics provide the {\it fastest} way,
as measured by asymptotic observers, to circle around spinning Kerr black
holes.
| [
{
"created": "Mon, 18 Jan 2021 07:29:22 GMT",
"version": "v1"
}
] | 2021-01-27 | [
[
"Hod",
"Shahar",
""
]
] | Black-hole spacetimes are known to possess closed light rings. We here present a remarkably compact theorem which reveals the physically intriguing fact that these unique null circular geodesics provide the {\it fastest} way, as measured by asymptotic observers, to circle around spinning Kerr black holes. |
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