id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0703044 | Valerio Faraoni | Valerio Faraoni (Bishop's University) | de Sitter space and the equivalence between f(R) and scalar-tensor
gravity | 4 pages, revtex, to appear in Phys. Rev. D. Revised version contains
additional and updated references | Phys.Rev.D75:067302,2007 | 10.1103/PhysRevD.75.067302 | null | gr-qc | null | It is shown that, when f'' is non-vanishing, metric f(R) gravity is
completely equivalent to a scalar-tensor theory (with zero Brans-Dicke
parameter) with respect to perturbations of de Sitter space, contrary to
previous expectations. Moreover, the stability conditions of de Sitter space
with respect to homogeneous a... | [
{
"created": "Tue, 6 Mar 2007 23:23:21 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Mar 2007 13:41:22 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Faraoni",
"Valerio",
"",
"Bishop's University"
]
] | It is shown that, when f'' is non-vanishing, metric f(R) gravity is completely equivalent to a scalar-tensor theory (with zero Brans-Dicke parameter) with respect to perturbations of de Sitter space, contrary to previous expectations. Moreover, the stability conditions of de Sitter space with respect to homogeneous and... |
0810.4152 | Sean Gryb B | Sean B. Gryb | Quantum Machian Time in Toy Models of Gravity | 27 pages, references added, typos fixed, additional comments added to
abs/intro/concl, journal ref added | Class.Quant.Grav.26:085015,2009 | 10.1088/0264-9381/26/8/085015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General Relativity on closed spatial topologies can be derived, using a
technique called "best-matching", as an evolving 3-geometry subject to
constraints. These constraints can be thought of as a way of imposing temporal
and spatial relationalism. The same type of constraints can be used in
non-relativistic particle... | [
{
"created": "Wed, 22 Oct 2008 20:17:15 GMT",
"version": "v1"
},
{
"created": "Wed, 6 May 2009 19:24:01 GMT",
"version": "v2"
}
] | 2009-11-18 | [
[
"Gryb",
"Sean B.",
""
]
] | General Relativity on closed spatial topologies can be derived, using a technique called "best-matching", as an evolving 3-geometry subject to constraints. These constraints can be thought of as a way of imposing temporal and spatial relationalism. The same type of constraints can be used in non-relativistic particle m... |
2202.06092 | Ali Banijamali | Behnaz Fazlpour, Ali Banijamali, Valerio Faraoni | Geometry of static $w=-1/5$ perfect fluid spheres in general relativity | 8 pages, latex | null | 10.1140/epjc/s10052-022-10349-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the physical features of two recent classes of analytical
solutions of the Einstein equations sourced by an exotic perfect fluid with
equation of state $ P=-\rho/5$. These geometries depend on up to four
parameters and are static and spherically symmetric. They describe compact
spaces with naked central si... | [
{
"created": "Sat, 12 Feb 2022 16:07:16 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Apr 2022 05:56:21 GMT",
"version": "v2"
}
] | 2022-05-11 | [
[
"Fazlpour",
"Behnaz",
""
],
[
"Banijamali",
"Ali",
""
],
[
"Faraoni",
"Valerio",
""
]
] | We discuss the physical features of two recent classes of analytical solutions of the Einstein equations sourced by an exotic perfect fluid with equation of state $ P=-\rho/5$. These geometries depend on up to four parameters and are static and spherically symmetric. They describe compact spaces with naked central sing... |
2311.03718 | Mikko Laine | H. Kolesova, M. Laine | Update on gravitational wave signals from post-inflationary phase
transitions | 12 pages. v2: minor fixes and clarifications | Phys.Lett.B 851 (2024) 138553 | 10.1016/j.physletb.2024.138553 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In view of recent interest in high-frequency detectors, broad features of
gravitational wave signals from phase transitions taking place soon after
inflation are summarized. The influence of the matter domination era that
follows the slow-roll stage is quantified in terms of two equilibration rates.
Turning to the hi... | [
{
"created": "Tue, 7 Nov 2023 04:52:07 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Mar 2024 10:05:57 GMT",
"version": "v2"
}
] | 2024-03-14 | [
[
"Kolesova",
"H.",
""
],
[
"Laine",
"M.",
""
]
] | In view of recent interest in high-frequency detectors, broad features of gravitational wave signals from phase transitions taking place soon after inflation are summarized. The influence of the matter domination era that follows the slow-roll stage is quantified in terms of two equilibration rates. Turning to the high... |
0808.1745 | Christopher Beetle | Christopher Beetle | Approximate Killing Fields as an Eigenvalue Problem | 4 pages, RevTeX | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Approximate Killing vector fields are expected to help define physically
meaningful spins for non-symmetric black holes in general relativity. However,
it is not obvious how such fields should be defined geometrically. This paper
relates a definition suggested recently by Cook and Whiting to an older
proposal by Matz... | [
{
"created": "Tue, 12 Aug 2008 22:16:38 GMT",
"version": "v1"
}
] | 2008-08-14 | [
[
"Beetle",
"Christopher",
""
]
] | Approximate Killing vector fields are expected to help define physically meaningful spins for non-symmetric black holes in general relativity. However, it is not obvious how such fields should be defined geometrically. This paper relates a definition suggested recently by Cook and Whiting to an older proposal by Matzne... |
2209.13277 | Guillaume Boileau | Guillaume Boileau and Nelson Christensen and Chloe Gowling and Mark
Hindmarsh and Renate Meyer | Prospects for LISA to detect a gravitational-wave background from first
order phase transitions | null | JCAP02(2023)056 | 10.1088/1475-7516/2023/02/056 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | First order phase transitions in the early universe could produce a
gravitational-wave background that might be detectable by the Laser
Interferometer Space Antenna (LISA). Such an observation would provide evidence
for physics beyond the Standard Model. We study the ability of LISA to observe
a gravitational-wave ba... | [
{
"created": "Tue, 27 Sep 2022 09:50:51 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Feb 2023 17:04:24 GMT",
"version": "v2"
}
] | 2023-03-01 | [
[
"Boileau",
"Guillaume",
""
],
[
"Christensen",
"Nelson",
""
],
[
"Gowling",
"Chloe",
""
],
[
"Hindmarsh",
"Mark",
""
],
[
"Meyer",
"Renate",
""
]
] | First order phase transitions in the early universe could produce a gravitational-wave background that might be detectable by the Laser Interferometer Space Antenna (LISA). Such an observation would provide evidence for physics beyond the Standard Model. We study the ability of LISA to observe a gravitational-wave back... |
gr-qc/0506037 | Carsten Gundlach | Carsten Gundlach and Jose M. Martin-Garcia | Hyperbolicity of second-order in space systems of evolution equations | null | Class.Quant.Grav. 23 (2006) S387-S404 | 10.1088/0264-9381/23/16/S06 | null | gr-qc | null | A possible definition of strong/symmetric hyperbolicity for a second-order
system of evolution equations is that it admits a reduction to first order
which is strongly/symmetric hyperbolic. We investigate the general system that
admits a reduction to first order and give necessary and sufficient criteria
for strong/s... | [
{
"created": "Mon, 6 Jun 2005 17:39:23 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Gundlach",
"Carsten",
""
],
[
"Martin-Garcia",
"Jose M.",
""
]
] | A possible definition of strong/symmetric hyperbolicity for a second-order system of evolution equations is that it admits a reduction to first order which is strongly/symmetric hyperbolic. We investigate the general system that admits a reduction to first order and give necessary and sufficient criteria for strong/sym... |
gr-qc/9612062 | Olaf Lechtenfeld | Helge Dennhardt, Olaf Lechtenfeld (Univ. of Hannover, Germany) | Scalar Deformations of Schwarzschild Holes and Their Stability | 24 pp, 16 figs, Latex; version published in Int. J. Mod. Phys. A | Int.J.Mod.Phys. A13 (1998) 741-764 | 10.1142/S0217751X98000329 | IASSNS-HEP-96/130 and ITP-UH-28/96 | gr-qc hep-th | null | We construct two solutions of the minimally coupled Einstein-scalar field
equations, representing regular deformations of Schwarzschild black holes by a
self-interacting, static, scalar field. One solution features an exponentially
decaying scalar field and a triple-well interaction potential; the other one is
comple... | [
{
"created": "Sat, 21 Dec 1996 01:44:46 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Jan 1998 15:16:06 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Dennhardt",
"Helge",
"",
"Univ. of Hannover, Germany"
],
[
"Lechtenfeld",
"Olaf",
"",
"Univ. of Hannover, Germany"
]
] | We construct two solutions of the minimally coupled Einstein-scalar field equations, representing regular deformations of Schwarzschild black holes by a self-interacting, static, scalar field. One solution features an exponentially decaying scalar field and a triple-well interaction potential; the other one is complete... |
1112.5004 | Emma Robinson | J. Abadie, B. P. Abbott, R. Abbott, T. D. Abbott, M. Abernathy, T.
Accadia, F. Acernese, C. Adams, R. Adhikari, C. Affeldt, M. Agathos, K.
Agatsuma, P. Ajith, B. Allen, E. Amador Ceron, D. Amariutei, S. B. Anderson,
W. G. Anderson, K. Arai, M. A. Arain, M. C. Araya, S. M. Aston, P. Astone, D.
Atkinson, P. Aufmu... | Upper limits on a stochastic gravitational-wave background using LIGO
and Virgo interferometers at 600-1000 Hz | 29 pages, 6 figures. For a repository of data used in the
publication, please see
https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=22210. Also see the
announcement for this paper at
http://www.ligo.org/science/Publication-S5VSR1StochIso/ | null | 10.1103/PhysRevD.85.122001 | LIGO-P1000128-v22 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A stochastic background of gravitational waves is expected to arise from a
superposition of many incoherent sources of gravitational waves, of either
cosmological or astrophysical origin. This background is a target for the
current generation of ground-based detectors. In this article we present the
first joint searc... | [
{
"created": "Wed, 21 Dec 2011 12:15:48 GMT",
"version": "v1"
},
{
"created": "Sat, 14 Jan 2012 13:22:02 GMT",
"version": "v2"
},
{
"created": "Sun, 29 Jan 2012 12:52:22 GMT",
"version": "v3"
},
{
"created": "Thu, 23 Feb 2012 19:05:58 GMT",
"version": "v4"
}
] | 2016-08-14 | [
[
"Abadie",
"J.",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""
],
[
"Abernathy",
"M.",
""
],
[
"Accadia",
"T.",
""
],
[
"Acernese",
"F.",
""
],
[
"Adams",
"C.",... | A stochastic background of gravitational waves is expected to arise from a superposition of many incoherent sources of gravitational waves, of either cosmological or astrophysical origin. This background is a target for the current generation of ground-based detectors. In this article we present the first joint search ... |
1904.08322 | Rajibul Shaikh | Rajibul Shaikh | Black hole shadow in a general rotating spacetime obtained through
Newman-Janis algorithm | 16 pages, 1 figure, more references added, published in PRD | Phys. Rev. D 100, 024028 (2019) | 10.1103/PhysRevD.100.024028 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Newman-Janis (NJ) algorithm has been extensively used in the literature
to generate rotating black hole solutions from nonrotating seed spacetimes. In
this work, we show, using various constants of motion, that the null geodesic
equations in an arbitrary stationary and axially symmetric rotating spacetime
obtaine... | [
{
"created": "Wed, 17 Apr 2019 15:39:32 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Jul 2019 11:28:40 GMT",
"version": "v2"
}
] | 2019-07-18 | [
[
"Shaikh",
"Rajibul",
""
]
] | The Newman-Janis (NJ) algorithm has been extensively used in the literature to generate rotating black hole solutions from nonrotating seed spacetimes. In this work, we show, using various constants of motion, that the null geodesic equations in an arbitrary stationary and axially symmetric rotating spacetime obtained ... |
1006.5027 | Ragab Gad | Ragab M. Gad | On Spherically Symmetric Non-Static Space-Times Admitting Homothetic
Motions | 10 pages, no figures | Nuovo Cim.B124:61-67,2009 | 10.1393/ncb/i2009-10745-3 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | Spherically symmetric solutions admitting a homothetic Killing vector field
(HKVF) either orthogonal, $\eta_{\bot}$, or parallel,$\eta_{||}$, to the
4-velocity vector field, $u^a$, are studied. New self-similar solution of
Einstein's field equation is found in the case when HKVF is in a general form.
Some physical pr... | [
{
"created": "Wed, 12 May 2010 12:23:06 GMT",
"version": "v1"
}
] | 2015-02-06 | [
[
"Gad",
"Ragab M.",
""
]
] | Spherically symmetric solutions admitting a homothetic Killing vector field (HKVF) either orthogonal, $\eta_{\bot}$, or parallel,$\eta_{||}$, to the 4-velocity vector field, $u^a$, are studied. New self-similar solution of Einstein's field equation is found in the case when HKVF is in a general form. Some physical prop... |
gr-qc/0208070 | Vladimir Kalashnikov | V. L. Kalashnikov | Quintessential Cosmological Scenarios in the Relativistic Theory of
Gravitation | LaTeX2e, 19 pages, Proc. XXV Int. Workshop on Fundamental Problems of
High Energy Physics and Field Theory (25-28 June 2002, Protvino, Russia) | Geometrical and Topological Ideas in Modern Physics, Petrov V.A.,
Ed. (Protvino, Russia), pp. 250-262 (2003). | null | null | gr-qc | null | It is shown that the accelerated expansion of the universe in the framework
of the relativistic theory of gravitation can be achieved by the introduction
of the quintessential term in the energy-momentum tensor. The value of the
minimum scaling factor and the modern observational data for the density and
state parame... | [
{
"created": "Fri, 23 Aug 2002 15:32:52 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Oct 2002 14:45:25 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kalashnikov",
"V. L.",
""
]
] | It is shown that the accelerated expansion of the universe in the framework of the relativistic theory of gravitation can be achieved by the introduction of the quintessential term in the energy-momentum tensor. The value of the minimum scaling factor and the modern observational data for the density and state paramete... |
1703.06223 | Davide Gerosa | Davide Gerosa, Emanuele Berti | Are merging black holes born from stellar collapse or previous mergers? | 18 pages, 7 figures, 3 tables. Accepted for publication in PRD.
Selected as PRD Editors' Suggestion | Phys. Rev. D 95, 124046 (2017) | 10.1103/PhysRevD.95.124046 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Advanced LIGO detectors at Hanford and Livingston made two confirmed and one
marginal detection of binary black holes during their first observing run. The
first event, GW150914, was from the merger of two black holes much heavier that
those whose masses have been estimated so far, indicating a formation scenario
tha... | [
{
"created": "Sat, 18 Mar 2017 00:14:29 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Apr 2017 20:10:03 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Jun 2017 20:56:45 GMT",
"version": "v3"
}
] | 2017-06-28 | [
[
"Gerosa",
"Davide",
""
],
[
"Berti",
"Emanuele",
""
]
] | Advanced LIGO detectors at Hanford and Livingston made two confirmed and one marginal detection of binary black holes during their first observing run. The first event, GW150914, was from the merger of two black holes much heavier that those whose masses have been estimated so far, indicating a formation scenario that ... |
gr-qc/0502074 | Frank Wilczek | Sean P. Robinson and Frank Wilczek | Relationship between Hawking Radiation and Gravitational Anomalies | 5 pages, 1 figure; v2: typo corrected, reference added; v3: comment
added, minor editorial changes to agree with published version | Phys.Rev.Lett.95:011303,2005 | 10.1103/PhysRevLett.95.011303 | MIT-CTP-3561 | gr-qc hep-th | null | We show that in order to avoid a breakdown of general covariance at the
quantum level the total flux in each outgoing partial wave of a quantum field
in a black hole background must be equal to that of a (1+1)-dimensional
blackbody at the Hawking temperature.
| [
{
"created": "Tue, 15 Feb 2005 19:12:16 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Feb 2005 20:30:55 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Aug 2005 21:04:44 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Robinson",
"Sean P.",
""
],
[
"Wilczek",
"Frank",
""
]
] | We show that in order to avoid a breakdown of general covariance at the quantum level the total flux in each outgoing partial wave of a quantum field in a black hole background must be equal to that of a (1+1)-dimensional blackbody at the Hawking temperature. |
gr-qc/0405148 | Gaetano Lambiase | G. Lambiase, G. Papini | Discrete symmetries and the muon's gyro-gravitational ratio in g-2
experiments | 4 pages, no figures | null | null | null | gr-qc | null | We show that recent, persistent discrepancies between theory and experiment
can be interpreted as corrections to the gyro-gravitational ratio of the muon
and lead to improved upper limits on the violation of discrete symmetries in
rotational inertia.
| [
{
"created": "Mon, 31 May 2004 09:53:24 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lambiase",
"G.",
""
],
[
"Papini",
"G.",
""
]
] | We show that recent, persistent discrepancies between theory and experiment can be interpreted as corrections to the gyro-gravitational ratio of the muon and lead to improved upper limits on the violation of discrete symmetries in rotational inertia. |
1401.2133 | Deniz Olgu Devecioglu | Deniz Olgu Devecioglu | Lifshitz black holes in Einstein-Yang-Mills theory | 23 pages, 8 figures; ver 2: added a new reference | Phys. Rev. D 89, 124020 (2014) | 10.1103/PhysRevD.89.124020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find that the four dimensional cosmological Einstein-Yang-Mills theory
with $SU(2)$ gauge group admits Lifshitz spacetime as a base solution for the
dynamical exponent $z>1$. Motivated by this, we next demonstrate numerically
that the field equations admit black hole solutions which behave regularly on
the horizon... | [
{
"created": "Thu, 9 Jan 2014 19:36:50 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Jan 2014 20:50:36 GMT",
"version": "v2"
}
] | 2014-06-25 | [
[
"Devecioglu",
"Deniz Olgu",
""
]
] | We find that the four dimensional cosmological Einstein-Yang-Mills theory with $SU(2)$ gauge group admits Lifshitz spacetime as a base solution for the dynamical exponent $z>1$. Motivated by this, we next demonstrate numerically that the field equations admit black hole solutions which behave regularly on the horizon a... |
1202.2836 | Eugeny Babichev | E. Babichev, V. Dokuchaev, Yu. Eroshenko | Backreaction of accreting matter onto a black hole in the
Eddington-Finkelstein coordinates | 12 pages, v.2: references added, typos corrected, matches published
version | Class. Quantum Grav. 29 115002 (2012) | 10.1088/0264-9381/29/11/115002 | LPT-Orsay 12-47 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study backreaction of accreting matter onto a spherically symmetric black
hole in a perturbative way, when accretion is in a quasi-steady state. General
expressions for corrections to the metric coefficients are found in the
Eddington-Finkelstein coordinates. It is shown that near the horizon of a black
hole, inde... | [
{
"created": "Mon, 13 Feb 2012 20:26:35 GMT",
"version": "v1"
},
{
"created": "Tue, 15 May 2012 10:16:59 GMT",
"version": "v2"
}
] | 2012-05-16 | [
[
"Babichev",
"E.",
""
],
[
"Dokuchaev",
"V.",
""
],
[
"Eroshenko",
"Yu.",
""
]
] | We study backreaction of accreting matter onto a spherically symmetric black hole in a perturbative way, when accretion is in a quasi-steady state. General expressions for corrections to the metric coefficients are found in the Eddington-Finkelstein coordinates. It is shown that near the horizon of a black hole, indepe... |
2110.02278 | Behnoush Afshar | B. Afshar and N. Riazi and H. Moradpour | A note on inflation in dRGT massive gravity | Accepted by The European Physical Jouranal C (2022) | null | 10.1140/epjc/s10052-022-10393-y | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Although the dRGT massive gravity successfully explains the late-time cosmic
acceleration, it cannot justify inflation. On the other hand, and in the
frameworks of General Relativity and modified gravity, the interests and
attempts to describe dark energy and inflation by using Lagranginas, which may
have pole, have ... | [
{
"created": "Tue, 5 Oct 2021 18:33:14 GMT",
"version": "v1"
},
{
"created": "Sat, 7 May 2022 07:03:45 GMT",
"version": "v2"
}
] | 2022-05-25 | [
[
"Afshar",
"B.",
""
],
[
"Riazi",
"N.",
""
],
[
"Moradpour",
"H.",
""
]
] | Although the dRGT massive gravity successfully explains the late-time cosmic acceleration, it cannot justify inflation. On the other hand, and in the frameworks of General Relativity and modified gravity, the interests and attempts to describe dark energy and inflation by using Lagranginas, which may have pole, have re... |
2107.12223 | M\`arius Josep Fullana i Alfonso | Neus Puchades Colmenero, Jos\'e Vicente Arnau C\'ordoba and M\`arius
Josep Fullana i Alfonso | Relativistic positioning: including the influence of the gravitational
action of the Sun and the Moon and the Earth's oblateness on Galileo
satellites | 24 pages, 10 figures, original research paper | Astrophysics and Space Science volume 366, Article number: 66
(2021) | 10.1007/s10509-021-03973-z | manuscript number, Manuscrit Number: ASTR-D-21-00090R2 | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Uncertainties in the satellite world lines lead to dominant positioning
errors. In the present work, using the approach presented in \cite{neu14}, a
new analysis of these errors is developed inside a great region surrounding
Earth. This analysis is performed in the framework of the so-called
Relativistic Positioning ... | [
{
"created": "Fri, 23 Jul 2021 17:47:20 GMT",
"version": "v1"
}
] | 2021-07-27 | [
[
"Colmenero",
"Neus Puchades",
""
],
[
"Córdoba",
"José Vicente Arnau",
""
],
[
"Alfonso",
"Màrius Josep Fullana i",
""
]
] | Uncertainties in the satellite world lines lead to dominant positioning errors. In the present work, using the approach presented in \cite{neu14}, a new analysis of these errors is developed inside a great region surrounding Earth. This analysis is performed in the framework of the so-called Relativistic Positioning Sy... |
2101.08592 | Jean-Pierre Luminet | Jean-Pierre Luminet (Laboratoire d'Astrophysique de Marseille) | Closed Timelike Curves, Singularities and Causality: A Survey from
G\"odel to Chronological Protection | 11 pages | Universe (2021),7, 12 | 10.3390/universe7010012 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | I give a historical survey of the discussions about the existence of closed
timelike curves in general relativistic models of the universe, opening the
physical possibility of time travel in the past, as first recognized by K.
G\"odel in his rotating universe model of 1949. I emphasize that journeying
into the past i... | [
{
"created": "Thu, 21 Jan 2021 13:13:01 GMT",
"version": "v1"
}
] | 2021-01-22 | [
[
"Luminet",
"Jean-Pierre",
"",
"Laboratoire d'Astrophysique de Marseille"
]
] | I give a historical survey of the discussions about the existence of closed timelike curves in general relativistic models of the universe, opening the physical possibility of time travel in the past, as first recognized by K. G\"odel in his rotating universe model of 1949. I emphasize that journeying into the past is ... |
1004.1110 | Antonino Marciano | Antonino Marciano, Giovanni Amelino-Camelia, Nicola Rossano Bruno,
Giulia Gubitosi, Gianluca Mandanici and Alessandro Melchiorri | Interplay between curvature and Planck-scale effects in astrophysics and
cosmology | 26 pages. | JCAP 1006:030,2010 | 10.1088/1475-7516/2010/06/030 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Several recent studies have considered the implications for astrophysics and
cosmology of some possible nonclassical properties of spacetime at the Planck
scale. The new effects, such as a Planck-scale-modified energy-momentum
(dispersion) relation, are often inferred from the analysis of some quantum
versions of Min... | [
{
"created": "Wed, 7 Apr 2010 15:16:46 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Marciano",
"Antonino",
""
],
[
"Amelino-Camelia",
"Giovanni",
""
],
[
"Bruno",
"Nicola Rossano",
""
],
[
"Gubitosi",
"Giulia",
""
],
[
"Mandanici",
"Gianluca",
""
],
[
"Melchiorri",
"Alessandro",
""
]
] | Several recent studies have considered the implications for astrophysics and cosmology of some possible nonclassical properties of spacetime at the Planck scale. The new effects, such as a Planck-scale-modified energy-momentum (dispersion) relation, are often inferred from the analysis of some quantum versions of Minko... |
gr-qc/0309129 | Diego Pavon | Narayan Banerjee, Diego Pavon and Somasri Sen | Periodic distribution of galaxies in generalized scalar tensor theory | 8 pages, 4 ps figures, PACS Numbers: 98.65.Dx, 04.50.+h, 95.35.+d,
98.62.Py | Gen.Rel.Grav. 35 (2003) 851-862 | 10.1023/A:1022995104231 | null | gr-qc astro-ph hep-ph | null | With the help of Nordtvedt's scalar tensor theory an exact analytical model
of a non-minimally coupled scalar field cosmology in which the gravitational
coupling $G$ and the Hubble factor $H$ oscillate during the radiation era is
presented. A key feature is that the oscillations are confined to the early
stages of th... | [
{
"created": "Fri, 26 Sep 2003 15:21:26 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Banerjee",
"Narayan",
""
],
[
"Pavon",
"Diego",
""
],
[
"Sen",
"Somasri",
""
]
] | With the help of Nordtvedt's scalar tensor theory an exact analytical model of a non-minimally coupled scalar field cosmology in which the gravitational coupling $G$ and the Hubble factor $H$ oscillate during the radiation era is presented. A key feature is that the oscillations are confined to the early stages of the ... |
gr-qc/9507012 | Lior M. Burko | Lior M. Burko | Dipole Perturbations of the Reissner-Nordstrom Solution: The Polar Case | 16 pages, LaTeX, no figures. Submitted for publication in Physical
Review D | Phys.Rev.D52:4518-4526,1995 | 10.1103/PhysRevD.52.4518 | TECHNION-PH-95-5 | gr-qc | null | The formalism developed by Chandrasekhar for the linear polar perturbations
of the Reissner-Nordstrom solution is generalized to include the case of dipole
(l=1) perturbations. Then, the perturbed metric coefficients and components of
the Maxwell tensor are computed.
| [
{
"created": "Thu, 6 Jul 1995 09:45:59 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Burko",
"Lior M.",
""
]
] | The formalism developed by Chandrasekhar for the linear polar perturbations of the Reissner-Nordstrom solution is generalized to include the case of dipole (l=1) perturbations. Then, the perturbed metric coefficients and components of the Maxwell tensor are computed. |
1408.7116 | Zbigniew Haba | Z.Haba | Temperature fluctuations in an inhomogeneous diffusive fluid | 14 pages,minor corrections | Mod.Phys.Lett.A30,1550036(2015) | 10.1142/S0217732315500364 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss metric perturbations of the relativistic diffusion equation around
the homogeneous Juttner equilibrium of massless particles in a homogeneous
expanding universe. The metric perturbation describes matter distribution and
the gravitational wave background in an inhomogeneous universe. We show that
the lowest... | [
{
"created": "Fri, 29 Aug 2014 19:49:27 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Oct 2014 18:16:55 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Feb 2015 16:49:17 GMT",
"version": "v3"
}
] | 2015-02-27 | [
[
"Haba",
"Z.",
""
]
] | We discuss metric perturbations of the relativistic diffusion equation around the homogeneous Juttner equilibrium of massless particles in a homogeneous expanding universe. The metric perturbation describes matter distribution and the gravitational wave background in an inhomogeneous universe. We show that the lowest o... |
1409.4472 | Bahram Mashhoon | B. Mashhoon | Nonlocal Gravity: The General Linear Approximation | 51 pages; v2: Ref. [23] updated | Phys. Rev. D 90, 124031 (2014) | 10.1103/PhysRevD.90.124031 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent classical nonlocal generalization of Einstein's theory of
gravitation is presented within the framework of general relativity via the
introduction of a preferred frame field. The nonlocal generalization of
Einstein's field equations is derived. The linear approximation of nonlocal
gravity (NLG) is thorough... | [
{
"created": "Tue, 16 Sep 2014 00:19:20 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Dec 2014 19:41:56 GMT",
"version": "v2"
}
] | 2015-06-22 | [
[
"Mashhoon",
"B.",
""
]
] | The recent classical nonlocal generalization of Einstein's theory of gravitation is presented within the framework of general relativity via the introduction of a preferred frame field. The nonlocal generalization of Einstein's field equations is derived. The linear approximation of nonlocal gravity (NLG) is thoroughly... |
1006.2230 | Torsten Asselmeyer-Maluga | Torsten Asselmeyer-Maluga and Helge Rose | On the geometrization of matter by exotic smoothness | 30 pages, 3 figures, svjour style, complete reworking now using
Fintushel-Stern knot surgery of elliptic surfaces, discussion of Lorentz
metric and global hyperbolicity for exotic 4-manifolds added, final version
for publication in Gen. Rel. Grav, small typos errors fixed | General Relativity and Gravitation: Volume 44, Issue 11 (2012),
Page 2825-2856 | 10.1007/s10714-012-1419-3 | null | gr-qc hep-th math-ph math.GT math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we discuss the question how matter may emerge from space. For
that purpose we consider the smoothness structure of spacetime as underlying
structure for a geometrical model of matter. For a large class of compact
4-manifolds, the elliptic surfaces, one is able to apply the knot surgery of
Fintushel and ... | [
{
"created": "Fri, 11 Jun 2010 08:30:37 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jan 2011 09:51:55 GMT",
"version": "v2"
},
{
"created": "Mon, 4 Jul 2011 20:04:20 GMT",
"version": "v3"
},
{
"created": "Mon, 5 Mar 2012 13:56:58 GMT",
"version": "v4"
},
{
"crea... | 2012-10-22 | [
[
"Asselmeyer-Maluga",
"Torsten",
""
],
[
"Rose",
"Helge",
""
]
] | In this paper we discuss the question how matter may emerge from space. For that purpose we consider the smoothness structure of spacetime as underlying structure for a geometrical model of matter. For a large class of compact 4-manifolds, the elliptic surfaces, one is able to apply the knot surgery of Fintushel and St... |
2408.06389 | Ion I. Cotaescu | Ion I. Cotaescu | New one-parameter models of dynamical particles in spatially flat FLRW
space-times | 15 pages, 5 figures | null | 10.1140/epjc/s10052-024-13174-x | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | New one-parameter models of non-rotating dynamical particles are derived as
isotropic solutions of Einstein's equations with perfect fluid in space-times
with FLRW asymptotic behaviour generalizing thus the models proposed recently
in [I. I. Cot\u aescu, Eur. Phys. J. C (2022) 82:86]. These particles are
produced by ... | [
{
"created": "Sun, 11 Aug 2024 05:27:33 GMT",
"version": "v1"
}
] | 2024-08-14 | [
[
"Cotaescu",
"Ion I.",
""
]
] | New one-parameter models of non-rotating dynamical particles are derived as isotropic solutions of Einstein's equations with perfect fluid in space-times with FLRW asymptotic behaviour generalizing thus the models proposed recently in [I. I. Cot\u aescu, Eur. Phys. J. C (2022) 82:86]. These particles are produced by ce... |
gr-qc/9503023 | Roland Puntigam | R.A. Puntigam, E. Schr\"ufer, and F.W. Hehl | The Use of Computer Algebra in Maxwell's Theory | 17 pages, LaTeX, uses worldsci.sty, two figures availabel from the
Authors | null | null | Cologne-thp-1995-H5 | gr-qc | null | We present a small computer algebra program for use in Maxwell's theory. The
Maxwell equations and the energy-momentum current of the electromagnetic field
are formulated in the language of exterior differential forms. The
corresponding program can be applied (in the presence of a gravitational field)
in curved Riema... | [
{
"created": "Tue, 14 Mar 1995 18:32:46 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Puntigam",
"R. A.",
""
],
[
"Schrüfer",
"E.",
""
],
[
"Hehl",
"F. W.",
""
]
] | We present a small computer algebra program for use in Maxwell's theory. The Maxwell equations and the energy-momentum current of the electromagnetic field are formulated in the language of exterior differential forms. The corresponding program can be applied (in the presence of a gravitational field) in curved Riemann... |
2009.13748 | Hamid Reza Sepangi | Mohaddese Heydari-Fard, Hamid Reza Sepangi | Thin accretion disk signatures of scalarized black holes in
Einstein-scalar-Gauss-Bonnet gravity | 13 pages, 3 figures, to appear in PLB | Phys. Lett. B 816 (2021) 136276 | 10.1016/j.physletb.2021.136276 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein-scalar-Gauss-Bonnet gravity has recently been known to exhibit
spontaneous scalarization. In the presence of the Gauss-Bonnet term the no-hair
theorem can be evaded and novel black hole solutions with non-trivial scalar
fields have been found besides the general relativistic solutions. In this
paper, we aim ... | [
{
"created": "Tue, 29 Sep 2020 03:29:45 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Apr 2021 08:08:57 GMT",
"version": "v2"
}
] | 2021-04-12 | [
[
"Heydari-Fard",
"Mohaddese",
""
],
[
"Sepangi",
"Hamid Reza",
""
]
] | Einstein-scalar-Gauss-Bonnet gravity has recently been known to exhibit spontaneous scalarization. In the presence of the Gauss-Bonnet term the no-hair theorem can be evaded and novel black hole solutions with non-trivial scalar fields have been found besides the general relativistic solutions. In this paper, we aim to... |
1902.08207 | Kathryn Zurek | Erik P. Verlinde, Kathryn M. Zurek | Observational Signatures of Quantum Gravity in Interferometers | 6 pages, 1 figure. v2: Updated to reflect published version | null | 10.1016/j.physletb.2021.136663 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the uncertainty in the arm length of an interferometer due to
metric fluctuations from the quantum nature of gravity, proposing a concrete
microscopic model of energy fluctuations in holographic degrees of freedom on
the surface bounding a causally connected region of spacetime. In our model,
fluctuations... | [
{
"created": "Thu, 21 Feb 2019 19:00:01 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Oct 2021 17:45:49 GMT",
"version": "v2"
}
] | 2021-10-22 | [
[
"Verlinde",
"Erik P.",
""
],
[
"Zurek",
"Kathryn M.",
""
]
] | We consider the uncertainty in the arm length of an interferometer due to metric fluctuations from the quantum nature of gravity, proposing a concrete microscopic model of energy fluctuations in holographic degrees of freedom on the surface bounding a causally connected region of spacetime. In our model, fluctuations l... |
1903.03047 | Sindy Mojica | E. A. Becerra-Vergara, Sindy Mojica, F. D. Lora-Clavijo, and Alejandro
Cruz-Osorio | Anisotropic Quark Stars with an Interacting Quark Equation of State | All comments and suggestions are welcome | Phys. Rev. D 100, 103006 (2019) | 10.1103/PhysRevD.100.103006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A deep exploration of the parameter space that relates the interacting
equation of state with the bag constant B, and the interaction parameter a, is
fundamental for the construction of diverse models of quark stars. In
particular, the anisotropy of quark stars with a well-motivated quantum
chromodynamics (QCD) equat... | [
{
"created": "Thu, 7 Mar 2019 17:12:14 GMT",
"version": "v1"
}
] | 2019-11-26 | [
[
"Becerra-Vergara",
"E. A.",
""
],
[
"Mojica",
"Sindy",
""
],
[
"Lora-Clavijo",
"F. D.",
""
],
[
"Cruz-Osorio",
"Alejandro",
""
]
] | A deep exploration of the parameter space that relates the interacting equation of state with the bag constant B, and the interaction parameter a, is fundamental for the construction of diverse models of quark stars. In particular, the anisotropy of quark stars with a well-motivated quantum chromodynamics (QCD) equatio... |
2211.02822 | Tanmoy Paul | Shin'ichi Nojiri, Sergei D. Odintsov, Tanmoy Paul | Modified cosmology from the thermodynamics of apparent horizon | Physics Letters B (PLB) accepted | null | 10.1016/j.physletb.2022.137553 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the realm of the Bekenstein-Hawking entropy, the thermodynamics of
apparent horizon bridges with the usual FLRW
(Friedmann-Lema\^{i}tre-Robertson-Walker) equation only for a special case
where the matter field is given by a perfect fluid having equation of state
(EoS) parameter $= -1$, i.e $p = -\rho$ with $\rho$ ... | [
{
"created": "Sat, 5 Nov 2022 06:28:44 GMT",
"version": "v1"
}
] | 2022-12-14 | [
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Paul",
"Tanmoy",
""
]
] | In the realm of the Bekenstein-Hawking entropy, the thermodynamics of apparent horizon bridges with the usual FLRW (Friedmann-Lema\^{i}tre-Robertson-Walker) equation only for a special case where the matter field is given by a perfect fluid having equation of state (EoS) parameter $= -1$, i.e $p = -\rho$ with $\rho$ an... |
1703.03286 | Paola Dom\'inguez Fern\'andez | Paola Dom\'inguez-Fern\'andez (1), Erik Jim\'enez-V\'azquez (2),
Miguel Alcubierre (2), Edison Montoya (3) and Dar\'io N\'u\~nez (2) ((1)
Argelander Institut f\"ur Astronomie, Universit\"at Bonn, (2) Instituto de
Ciencias Nucleares, Universidad Nacional Aut\'onoma de M\'exico, (3) Escuela
de F\'isica, Universid... | Description of the evolution of inhomogeneities on a Dark Matter halo
with the Vlasov equation | 26 pages, 67 figures, 1 table, submitted to MNRAS | null | 10.1007/s10714-017-2286-8 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use a direct numerical integration of the Vlasov equation in spherical
symmetry with a background gravitational potential to determine the evolution
of a collection of particles in different models of a galactic halo. Such a
collection is assumed to represent a dark matter inhomogeneity which reaches a
stationary ... | [
{
"created": "Tue, 7 Mar 2017 22:03:30 GMT",
"version": "v1"
}
] | 2017-09-06 | [
[
"Domínguez-Fernández",
"Paola",
""
],
[
"Jiménez-Vázquez",
"Erik",
""
],
[
"Alcubierre",
"Miguel",
""
],
[
"Montoya",
"Edison",
""
],
[
"Núñez",
"Darío",
""
]
] | We use a direct numerical integration of the Vlasov equation in spherical symmetry with a background gravitational potential to determine the evolution of a collection of particles in different models of a galactic halo. Such a collection is assumed to represent a dark matter inhomogeneity which reaches a stationary st... |
2103.09913 | Pratik Wagle | Pratik Wagle, Nicolas Yunes and Hector O. Silva | Quasinormal modes of slowly-rotating black holes in dynamical
Chern-Simons gravity | 28 pages, 6 figures, 15 tables | Phys. Rev. D 105, 124003 (2022) | 10.1103/PhysRevD.105.124003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of gravitational waves from compact binary mergers by the
LIGO/Virgo collaboration has, for the first time, allowed us to test
relativistic gravity in its strong, dynamical and nonlinear regime, thus
opening a new arena to confront general relativity (and modifications thereof)
against observations. We ... | [
{
"created": "Wed, 17 Mar 2021 21:17:24 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Aug 2021 16:29:15 GMT",
"version": "v2"
},
{
"created": "Tue, 14 Jun 2022 21:23:57 GMT",
"version": "v3"
}
] | 2022-06-16 | [
[
"Wagle",
"Pratik",
""
],
[
"Yunes",
"Nicolas",
""
],
[
"Silva",
"Hector O.",
""
]
] | The detection of gravitational waves from compact binary mergers by the LIGO/Virgo collaboration has, for the first time, allowed us to test relativistic gravity in its strong, dynamical and nonlinear regime, thus opening a new arena to confront general relativity (and modifications thereof) against observations. We co... |
1907.09148 | Hao-Hao Li | Hao-Hao Li and Yun-Song Piao | Time crystals in primordial perturbations | 11 pages, 4 figures, references added, published version | Phys.Lett. B801 (2020) 135156 | 10.1016/j.physletb.2019.135156 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmological time crystal (TC) corresponds to a matter state where the
periodic motion of field forms a limit cycle in its phase space. We explore
what would happen if it existed in inflationary phase. It is found that the
limit cycle responsible for TC will inevitably cause the periodic oscillation
of the primordial... | [
{
"created": "Mon, 22 Jul 2019 06:24:57 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Dec 2019 05:23:33 GMT",
"version": "v2"
}
] | 2019-12-30 | [
[
"Li",
"Hao-Hao",
""
],
[
"Piao",
"Yun-Song",
""
]
] | Cosmological time crystal (TC) corresponds to a matter state where the periodic motion of field forms a limit cycle in its phase space. We explore what would happen if it existed in inflationary phase. It is found that the limit cycle responsible for TC will inevitably cause the periodic oscillation of the primordial p... |
gr-qc/9411019 | Anzhong Wang | Anzhong Wang and Nilton O. Santos | Gravitational and Particle Radiation from Cosmic Strings | 16 pages, Latex, no figures | Class.Quant.Grav.13:715-722,1996 | 10.1088/0264-9381/13/4/011 | null | gr-qc | null | Gravitational and massless particle radiation of straight cosmic strings with
finite thickness is studied analytically. It is found that the non-linear
interaction of the radiation fields emitted by a cosmic string with the ones of
the string always makes the spacetime singular at the symmetry axis. The
singularity i... | [
{
"created": "Tue, 8 Nov 1994 12:16:53 GMT",
"version": "v1"
}
] | 2009-07-07 | [
[
"Wang",
"Anzhong",
""
],
[
"Santos",
"Nilton O.",
""
]
] | Gravitational and massless particle radiation of straight cosmic strings with finite thickness is studied analytically. It is found that the non-linear interaction of the radiation fields emitted by a cosmic string with the ones of the string always makes the spacetime singular at the symmetry axis. The singularity is ... |
1309.1990 | Yongsung Yoon | Yongsung Yoon | Conformally Coupled Induced Gravity as an Infrared Fixed Point | 6 pages. arXiv admin note: substantial text overlap with
arXiv:1308.4952, arXiv:0906.4091 | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have found that the conformally coupled induced gravity can be an infrared
fixed point of induced gravity with Yukawa couplings with matter. The late time
cosmology with a uniform mean matter distribution can be described by the
conformally coupled induced gravity, which has an emergent global conformal
symmetry i... | [
{
"created": "Sun, 8 Sep 2013 18:23:52 GMT",
"version": "v1"
}
] | 2013-09-10 | [
[
"Yoon",
"Yongsung",
""
]
] | We have found that the conformally coupled induced gravity can be an infrared fixed point of induced gravity with Yukawa couplings with matter. The late time cosmology with a uniform mean matter distribution can be described by the conformally coupled induced gravity, which has an emergent global conformal symmetry in ... |
2407.12409 | Nakia Carlevaro | Giovanni Montani, Nakia Carlevaro, Mariaveronica De Angelis | Modified gravity in the presence of matter creation: scenario for the
late Universe | 8 pages, 3 figures | Entropy 26, 662 (2024) | 10.3390/e26080662 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a dynamic scenario for characterizing the late Universe
evolution, aiming to mitigate the Hubble tension. Specifically, we consider a
metric $f(R)$ gravity in the Jordan frame which is implemented to the dynamics
of a flat isotropic Universe. This cosmological model incorporates a matter
creation process,... | [
{
"created": "Wed, 17 Jul 2024 08:40:05 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Aug 2024 09:17:31 GMT",
"version": "v2"
}
] | 2024-08-06 | [
[
"Montani",
"Giovanni",
""
],
[
"Carlevaro",
"Nakia",
""
],
[
"De Angelis",
"Mariaveronica",
""
]
] | We consider a dynamic scenario for characterizing the late Universe evolution, aiming to mitigate the Hubble tension. Specifically, we consider a metric $f(R)$ gravity in the Jordan frame which is implemented to the dynamics of a flat isotropic Universe. This cosmological model incorporates a matter creation process, d... |
2304.11092 | Yousef Bisabr | Yousef Bisabr | Attractor Solutions in Interacting Dark Energy Models | 9 pages, 2 figures | Ann. Phys. 458, 169443 (2023) | 10.1016/j.aop.2023.169443 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate a cosmological model in which dark energy, represented by a
quintessential scalar field, is coupled to a dark-matter perfect fluid in the
spatially flat Friedmann-Robertson-Walker Universe. This allows an energy
exchange in the dark sector which could happen both at early times before
recombination era... | [
{
"created": "Fri, 21 Apr 2023 15:59:41 GMT",
"version": "v1"
}
] | 2023-08-22 | [
[
"Bisabr",
"Yousef",
""
]
] | We investigate a cosmological model in which dark energy, represented by a quintessential scalar field, is coupled to a dark-matter perfect fluid in the spatially flat Friedmann-Robertson-Walker Universe. This allows an energy exchange in the dark sector which could happen both at early times before recombination era o... |
gr-qc/0303077 | Krsna Dev | Krsna Dev, Marcelo Gleiser | Anisotropic Stars II : Stability | 26 pages 3 figures | Gen.Rel.Grav. 35 (2003) 1435-1457 | 10.1023/A:1024534702166 | null | gr-qc astro-ph | null | We investigate the stability of self-gravitating spherically symmetric
anisotropic spheres under radial perturbations. We consider both the Newtonian
and the full general-relativistic perturbation treatment. In the
general-relativistic case, we extend the variational formalism for spheres with
isotropic pressure deve... | [
{
"created": "Thu, 20 Mar 2003 03:36:41 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Dev",
"Krsna",
""
],
[
"Gleiser",
"Marcelo",
""
]
] | We investigate the stability of self-gravitating spherically symmetric anisotropic spheres under radial perturbations. We consider both the Newtonian and the full general-relativistic perturbation treatment. In the general-relativistic case, we extend the variational formalism for spheres with isotropic pressure develo... |
0712.0208 | Xin-Zhou Li | Xin-zhou Li, Ping Xi and Xiang-hua Zhai | Global monopole surrounded by quintessence-like matter | 8 pages, 8 figures, added discussion and some references, the form
accepted for publication in Physics Letter B | Phys.Lett.B666:125-130,2008 | 10.1016/j.physletb.2008.06.069 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present new static spherically-symmetric solutions of Einstein equations
with the quintessence-like matter surrounding a global monopole. These new
solutions of the coupling scalar-Einstein equations are more complicated, which
depend on the parameter of equation of state $-1 < w_{q} <-{1/3}$. A
gravitating global... | [
{
"created": "Mon, 3 Dec 2007 03:06:37 GMT",
"version": "v1"
},
{
"created": "Sun, 27 Apr 2008 07:17:19 GMT",
"version": "v2"
},
{
"created": "Wed, 2 Jul 2008 01:57:10 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Li",
"Xin-zhou",
""
],
[
"Xi",
"Ping",
""
],
[
"Zhai",
"Xiang-hua",
""
]
] | We present new static spherically-symmetric solutions of Einstein equations with the quintessence-like matter surrounding a global monopole. These new solutions of the coupling scalar-Einstein equations are more complicated, which depend on the parameter of equation of state $-1 < w_{q} <-{1/3}$. A gravitating global m... |
gr-qc/0207067 | Michael Edmund Tobar | Michael Edmund Tobar, John Gideon Hartnett and James David Anstie | Proposal for a New Michelson-Morley Experiment Using a Single Whispering
Spherical Mode Resonator | One pdf. to be published in Phys. Let. A, 2002 | Phys.Lett. A300 (2002) 33-39 | 10.1016/S0375-9601(02)00604-7 | null | gr-qc | null | A new Michelson-Morley experiment is proposed by measuring the beat frequency
of two near degenerate modes with orthogonal propagation in a single spherical
resonator. The unique properties of the experiment allow: 1. Substantial common
mode rejection of some noise sources: 2. Simple calculation of the signal if
Spec... | [
{
"created": "Wed, 17 Jul 2002 23:51:25 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Tobar",
"Michael Edmund",
""
],
[
"Hartnett",
"John Gideon",
""
],
[
"Anstie",
"James David",
""
]
] | A new Michelson-Morley experiment is proposed by measuring the beat frequency of two near degenerate modes with orthogonal propagation in a single spherical resonator. The unique properties of the experiment allow: 1. Substantial common mode rejection of some noise sources: 2. Simple calculation of the signal if Specia... |
gr-qc/0508016 | Helmut Friedrich | Helmut Friedrich | Is general relativity `essentially understood' ? | Extended version of a talk which was to be delivered at the DPG
Fruehjahrstagung in Berlin, 5 March 2005 | Annalen Phys. 15 (2005) 84-108 | 10.1002/andp.200510173 | null | gr-qc | null | The content of Einstein's theory of gravitation is encoded in the properties
of the solutions to his field equations. There has been obtained a wealth of
information about these solutions in the ninety years the theory has been
around. It led to the prediction and the observation of physical phenomena
which confirm t... | [
{
"created": "Wed, 3 Aug 2005 14:20:09 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Friedrich",
"Helmut",
""
]
] | The content of Einstein's theory of gravitation is encoded in the properties of the solutions to his field equations. There has been obtained a wealth of information about these solutions in the ninety years the theory has been around. It led to the prediction and the observation of physical phenomena which confirm the... |
gr-qc/0412017 | Julio Cesar Fabris | J.C. Fabris | Introduction to cosmology | Latex file, 42 pages. Lectures given at the "Ecole Internationale sur
les structures geometriques et applications", Dakar, Senegal, november 2004.
In French | null | null | null | gr-qc | null | This text consists on a series of introductory lectures on cosmology for
mathematicians and physicists who are not specialized on the subject.
| [
{
"created": "Fri, 3 Dec 2004 17:12:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Fabris",
"J. C.",
""
]
] | This text consists on a series of introductory lectures on cosmology for mathematicians and physicists who are not specialized on the subject. |
2303.14136 | Gopi Kant Goswami Dr | Anirudh Pradhan, Gopikant Goswami, Aroonkumar Beesham | The Reconstruction of Constant Jerk Parameter with $f(R,T)$ Gravity | 19 pages 15 figures 1 table | Journal of High Energy Astrophysics 2023 | 10.1016/j.jheap.2023.03.001 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work, we have developed an FLRW type model of a universe which
displays transition from deceleration in the past to the acceleration at the
present. For this, we have considered field equations of $f(R,T)$ gravity and
have taken $f(R,T) = R + 2 \lambda T$, $\lambda$ being an arbitrary constant.
We have estima... | [
{
"created": "Thu, 23 Mar 2023 16:53:26 GMT",
"version": "v1"
}
] | 2023-03-27 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Goswami",
"Gopikant",
""
],
[
"Beesham",
"Aroonkumar",
""
]
] | In this work, we have developed an FLRW type model of a universe which displays transition from deceleration in the past to the acceleration at the present. For this, we have considered field equations of $f(R,T)$ gravity and have taken $f(R,T) = R + 2 \lambda T$, $\lambda$ being an arbitrary constant. We have estimate... |
1009.2459 | Asrin Abdolmaleki | K. Karami, A. Abdolmaleki | f(T) modified teleparallel gravity models as an alternative for
holographic and new agegraphic dark energy models | 22 pages, 8 figures, the preprint has been improved considerably | Res. Astron. Astrophys. 13 (2013) 757 | 10.1088/1674-4527/13/7/001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work, we reconstruct different f(T)-gravity models
corresponding to the original and entropy-corrected version of the holographic
and new agegraphic dark energy models. We also obtain the equation of state
parameters of the corresponding f(T)-gravity models. We conclude that the
holographic and new age... | [
{
"created": "Mon, 13 Sep 2010 17:44:02 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Aug 2011 04:59:19 GMT",
"version": "v2"
}
] | 2013-07-26 | [
[
"Karami",
"K.",
""
],
[
"Abdolmaleki",
"A.",
""
]
] | In the present work, we reconstruct different f(T)-gravity models corresponding to the original and entropy-corrected version of the holographic and new agegraphic dark energy models. We also obtain the equation of state parameters of the corresponding f(T)-gravity models. We conclude that the holographic and new agegr... |
gr-qc/0502069 | Matias Aiello | Matias Aiello, Rafael Ferraro, Gaston Giribet | Hoffmann-Infeld Black Hole Solutions in Lovelock Gravity | 6 pages, 5 figures, Revtex4. References added and comments clarified;
version accepted for publication | Class.Quant.Grav.22:2579-2588,2005 | 10.1088/0264-9381/22/13/004 | null | gr-qc hep-th | null | Five-dimensional black holes are studied in Lovelock gravity coupled to
Hoffmann-Infeld non-linear electrodynamics. It is shown that some of these
solutions present a double peak behavior of the temperature as a function of
the horizon radius. This feature implies that the evaporation process, though
drastic for a pe... | [
{
"created": "Mon, 14 Feb 2005 20:39:53 GMT",
"version": "v1"
},
{
"created": "Thu, 19 May 2005 17:30:11 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Aiello",
"Matias",
""
],
[
"Ferraro",
"Rafael",
""
],
[
"Giribet",
"Gaston",
""
]
] | Five-dimensional black holes are studied in Lovelock gravity coupled to Hoffmann-Infeld non-linear electrodynamics. It is shown that some of these solutions present a double peak behavior of the temperature as a function of the horizon radius. This feature implies that the evaporation process, though drastic for a peri... |
gr-qc/0401085 | Alexander Petrov Nikolaevich | A.N.Petrov | Conserved currents in $D$-dimensional gravity and brane cosmology | LATEX, 6 pages | Vestn.Mosk.Univ.Fiz.Astron. 2 (2004) 10-12; Moscow Univ.Phys.Bull.
59 (2004) 2:11-15 | null | null | gr-qc | null | In $D$-dimentional gravity on arbitrary curved backgrounds using proven
methods conserved currents, divergences of antisymmetrical tensor densities
(superpotentials), are constructed. These superpotentials have two remarkable
properties: they depend in an essential way on second derivatives in the
Lagrangian and are ... | [
{
"created": "Tue, 20 Jan 2004 10:53:22 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Nov 2004 15:59:32 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Petrov",
"A. N.",
""
]
] | In $D$-dimentional gravity on arbitrary curved backgrounds using proven methods conserved currents, divergences of antisymmetrical tensor densities (superpotentials), are constructed. These superpotentials have two remarkable properties: they depend in an essential way on second derivatives in the Lagrangian and are in... |
1401.6974 | Vasilis Oikonomou | V.K. Oikonomou | Fermions in a Reissner-Nordstr\"{o}m-anti-de Sitter Black Hole
Background and $N=4$ Supersymmetry with non-trivial Topological Charges | Substantial changes, presentation changed, reference list updated,
similar to journal version. arXiv admin note: text overlap with
arXiv:1208.0740 | null | 10.1142/S0217732314501314 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate that the fermions in Reissner-Nordstr\"{o}m-anti-de Sitter
black hole background in the chiral limit $m=0$, are related to an $N=4$
extended one dimensional supersymmetry with non-trivial topological charges. We
also show that the $N=4$ extended supersymmetry is unbroken and we extend the
two $N=2$ one... | [
{
"created": "Mon, 27 Jan 2014 19:32:58 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Jun 2014 11:18:18 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Oikonomou",
"V. K.",
""
]
] | We demonstrate that the fermions in Reissner-Nordstr\"{o}m-anti-de Sitter black hole background in the chiral limit $m=0$, are related to an $N=4$ extended one dimensional supersymmetry with non-trivial topological charges. We also show that the $N=4$ extended supersymmetry is unbroken and we extend the two $N=2$ one d... |
2104.05566 | Jose Beltran Jimenez | Jose Beltr\'an Jim\'enez and Tomi S. Koivisto | Accidental gauge symmetries of Minkowski spacetime in Teleparallel
theories | 13 pages, no figures. Invited contribution to the Universe Special
Issue "Teleparallel Gravity: Foundations and Observational Constraints". V2:
Extended discussion, added references and typos fixed. Matches published
version | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | In this paper, we provide a general framework for the construction of the
Einstein frame within non-linear extensions of the teleparallel equivalents of
General Relativity. These include the metric teleparallel and the symmetric
teleparallel, but also the general teleparallel theories. We write the actions
in a form ... | [
{
"created": "Mon, 12 Apr 2021 15:33:18 GMT",
"version": "v1"
},
{
"created": "Wed, 12 May 2021 16:26:46 GMT",
"version": "v2"
}
] | 2021-05-13 | [
[
"Jiménez",
"Jose Beltrán",
""
],
[
"Koivisto",
"Tomi S.",
""
]
] | In this paper, we provide a general framework for the construction of the Einstein frame within non-linear extensions of the teleparallel equivalents of General Relativity. These include the metric teleparallel and the symmetric teleparallel, but also the general teleparallel theories. We write the actions in a form wh... |
1708.04971 | Sandipan Sengupta | Sandipan Sengupta | Spacetime-bridge solutions in vacuum gravity | 14 pages, A reference added and a typo corrected | Phys. Rev. D 96, 104031 (2017) | 10.1103/PhysRevD.96.104031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spacetimes, which are representations of a bridge-like geometry in gravity
theory, are constructed as vacuum solutions to the first order equations of
motion. Each such configuration consists of two copies of an asymptotically
flat sheet, connected by a bridge of finite extension where tetrad is
noninvertible. These ... | [
{
"created": "Wed, 16 Aug 2017 16:52:40 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Sep 2017 06:21:31 GMT",
"version": "v2"
}
] | 2017-11-29 | [
[
"Sengupta",
"Sandipan",
""
]
] | Spacetimes, which are representations of a bridge-like geometry in gravity theory, are constructed as vacuum solutions to the first order equations of motion. Each such configuration consists of two copies of an asymptotically flat sheet, connected by a bridge of finite extension where tetrad is noninvertible. These so... |
2102.08438 | Leonardo Giani | Leonardo Giani | Accelerated expansion as manifestation of gravity: when Dark Energy
belongs to the left | PhD thesis, comments are welcome | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | In order to explain the Late-times accelerated expansion of the Universe we
must appeal to some form of Dark Energy. In the standard model of cosmology,
the latter is interpreted as a Cosmological Constant $\Lambda$. However, for a
number of reasons, a Cosmological Constant is not completely satisfactory. In
this the... | [
{
"created": "Tue, 16 Feb 2021 20:25:25 GMT",
"version": "v1"
}
] | 2021-02-18 | [
[
"Giani",
"Leonardo",
""
]
] | In order to explain the Late-times accelerated expansion of the Universe we must appeal to some form of Dark Energy. In the standard model of cosmology, the latter is interpreted as a Cosmological Constant $\Lambda$. However, for a number of reasons, a Cosmological Constant is not completely satisfactory. In this thesi... |
1604.08140 | Michael Boyle | Michael Boyle | How should spin-weighted spherical functions be defined? | This version corrects a typo in the definition of $K_{\pm}$ above Eq.
(44a). All other equations remain unchanged, including Eqs. (45b) and (46) | J. Math. Phys. 57, 092504 (2016) | 10.1063/1.4962723 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spin-weighted spherical functions provide a useful tool for analyzing
tensor-valued functions on the sphere. A tensor field can be decomposed into
complex-valued functions by taking contractions with tangent vectors on the
sphere and the normal to the sphere. These component functions are usually
presented as functio... | [
{
"created": "Wed, 27 Apr 2016 16:54:34 GMT",
"version": "v1"
},
{
"created": "Thu, 26 May 2016 17:56:09 GMT",
"version": "v2"
},
{
"created": "Fri, 23 Sep 2016 13:53:47 GMT",
"version": "v3"
},
{
"created": "Mon, 28 Aug 2023 19:19:24 GMT",
"version": "v4"
}
] | 2023-08-30 | [
[
"Boyle",
"Michael",
""
]
] | Spin-weighted spherical functions provide a useful tool for analyzing tensor-valued functions on the sphere. A tensor field can be decomposed into complex-valued functions by taking contractions with tangent vectors on the sphere and the normal to the sphere. These component functions are usually presented as functions... |
1011.1843 | Alexander Zhidenko | K. D. Kokkotas, R. A. Konoplya and A. Zhidenko | Quasinormal modes, scattering and Hawking radiation of Kerr-Newman black
holes in a magnetic field | 14 pages, 12 figures | Phys.Rev.D83:024031,2011 | 10.1103/PhysRevD.83.024031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a comprehensive analysis of the spectrum of proper oscillations
(quasinormal modes), transmission/reflection coefficients and Hawking radiation
for a massive charged scalar field in the background of the Kerr-Newman black
hole immersed in an asymptotically homogeneous magnetic field. There are two
main eff... | [
{
"created": "Mon, 8 Nov 2010 16:35:10 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Jan 2011 17:55:50 GMT",
"version": "v2"
}
] | 2015-03-17 | [
[
"Kokkotas",
"K. D.",
""
],
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | We perform a comprehensive analysis of the spectrum of proper oscillations (quasinormal modes), transmission/reflection coefficients and Hawking radiation for a massive charged scalar field in the background of the Kerr-Newman black hole immersed in an asymptotically homogeneous magnetic field. There are two main effec... |
2303.16553 | Kei-Ichi Maeda | Kei-ichi Maeda, Priti Gupta, and Hirotada Okawa | Dynamics of Binary System around Supermassive Black Hole | 34 pages,12 figures, 2 tables | null | 10.1103/PhysRevD.107.124039 | null | gr-qc astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | We discuss motion of a binary system around a supermassive black hole. Using
Fermi-Walker transport, we construct a local inertial reference frame and set
up a Newtonian binary system. Assuming a circular geodesic observer around a
Schwarzschild black hole, we write down the equations of motion of a binary.
Introduci... | [
{
"created": "Wed, 29 Mar 2023 09:22:07 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Apr 2023 03:04:35 GMT",
"version": "v2"
},
{
"created": "Tue, 4 Apr 2023 07:10:52 GMT",
"version": "v3"
}
] | 2023-06-28 | [
[
"Maeda",
"Kei-ichi",
""
],
[
"Gupta",
"Priti",
""
],
[
"Okawa",
"Hirotada",
""
]
] | We discuss motion of a binary system around a supermassive black hole. Using Fermi-Walker transport, we construct a local inertial reference frame and set up a Newtonian binary system. Assuming a circular geodesic observer around a Schwarzschild black hole, we write down the equations of motion of a binary. Introducing... |
1901.05363 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | $f(R)$ Gravity Inflation with String-Corrected Axion Dark Matter | References added, revised version, PRD Accepted | Phys. Rev. D 99, 064049 (2019) | 10.1103/PhysRevD.99.064049 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is quite well known for some time that string inspired axionic terms of
the form $\nu (\phi)\tilde{R}R$, known also as Chern-Simons terms, do not
affect the scalar perturbations and the background evolution for a flat
Friedman-Robertson-Walker Universe. In this paper we study and quantify the
implications of the p... | [
{
"created": "Wed, 16 Jan 2019 16:11:43 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Mar 2019 16:48:07 GMT",
"version": "v2"
}
] | 2019-04-03 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | It is quite well known for some time that string inspired axionic terms of the form $\nu (\phi)\tilde{R}R$, known also as Chern-Simons terms, do not affect the scalar perturbations and the background evolution for a flat Friedman-Robertson-Walker Universe. In this paper we study and quantify the implications of the pre... |
gr-qc/0402102 | D. Petroff | M. Ansorg, T. Fischer, A. Kleinw\"achter, R. Meinel, D. Petroff, K.
Sch\"obel (Theoretisch-Physikalisches Institut, University of Jena) | Equilibrium Configurations of Homogeneous Fluids in General Relativity | 8 pages, colour figures, v3: minor additions including one reference,
accepted by MNRAS | Mon.Not.Roy.Astron.Soc.355:682-688,2004 | 10.1111/j.1365-2966.2004.08371.x | null | gr-qc astro-ph | null | By means of a highly accurate, multi-domain, pseudo-spectral method, we
investigate the solution space of uniformly rotating, homogeneous and
axisymmetric relativistic fluid bodies. It turns out that this space can be
divided up into classes of solutions. In this paper, we present two new classes
including relativist... | [
{
"created": "Tue, 24 Feb 2004 13:42:58 GMT",
"version": "v1"
},
{
"created": "Thu, 13 May 2004 18:27:05 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Aug 2004 10:37:18 GMT",
"version": "v3"
}
] | 2010-12-23 | [
[
"Ansorg",
"M.",
"",
"Theoretisch-Physikalisches Institut, University of Jena"
],
[
"Fischer",
"T.",
"",
"Theoretisch-Physikalisches Institut, University of Jena"
],
[
"Kleinwächter",
"A.",
"",
"Theoretisch-Physikalisches Institut, University of Jena"
],
... | By means of a highly accurate, multi-domain, pseudo-spectral method, we investigate the solution space of uniformly rotating, homogeneous and axisymmetric relativistic fluid bodies. It turns out that this space can be divided up into classes of solutions. In this paper, we present two new classes including relativistic... |
2301.00498 | Masato Minamitsuji | Masato Minamitsuji, Antonio De Felice, Shinji Mukohyama, Michele
Oliosi | Gravitational collapse and odd-parity black hole perturbations in
Minimal Theory of Bigravity | 28 pages, published version | Phys. Rev. D 107, 064070 (2023) | 10.1103/PhysRevD.107.064070 | YITP-22-157, IPMU22-0068 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the former part, we study the gravitational collapse of pressureless dust
and find special solutions, where, in both the physical and fiducial sectors,
the exterior and interior spacetime geometries are given by the Schwarzschild
spacetimes and the Friedmann-Lema\^itre-Robertson-Walker universes dominated by
press... | [
{
"created": "Mon, 2 Jan 2023 01:17:39 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Mar 2023 16:07:53 GMT",
"version": "v2"
}
] | 2023-03-31 | [
[
"Minamitsuji",
"Masato",
""
],
[
"De Felice",
"Antonio",
""
],
[
"Mukohyama",
"Shinji",
""
],
[
"Oliosi",
"Michele",
""
]
] | In the former part, we study the gravitational collapse of pressureless dust and find special solutions, where, in both the physical and fiducial sectors, the exterior and interior spacetime geometries are given by the Schwarzschild spacetimes and the Friedmann-Lema\^itre-Robertson-Walker universes dominated by pressur... |
1410.0199 | Sk Hossein Dr. | Mehedi Kalam, Sk. Monowar Hossein and Sajahan Molla | Isotropic star in low-mass X-ray binaries and X-ray pulsars | 7 pages, 11 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a model for compact stars in the low mass X-ray binaries(LMXBs)
and X-ray pulsars using a metric given by John J. Matese and Patrick G. Whitman
\citep{Matese and Whitman1980}. Here the field equations are reduced to a
system of two algebraic equations considering the isotropic pressure. Compact
star candid... | [
{
"created": "Wed, 1 Oct 2014 12:27:38 GMT",
"version": "v1"
}
] | 2014-10-02 | [
[
"Kalam",
"Mehedi",
""
],
[
"Hossein",
"Sk. Monowar",
""
],
[
"Molla",
"Sajahan",
""
]
] | We present a model for compact stars in the low mass X-ray binaries(LMXBs) and X-ray pulsars using a metric given by John J. Matese and Patrick G. Whitman \citep{Matese and Whitman1980}. Here the field equations are reduced to a system of two algebraic equations considering the isotropic pressure. Compact star candidat... |
gr-qc/0502116 | Makoto Narita | Makoto Narita | On initial conditions and global existence for accelerating cosmologies
from string theory | To appear in Annales Henri Poincare | Annales Henri Poincare 6 (2005) 821-847 | 10.1007/s00023-005-0225-9 | AEI-2005-009 | gr-qc hep-th math-ph math.AP math.MP | null | We construct a solution satisfying initial conditions for accelerating
cosmologies from string/M-theory. Gowdy symmetric spacetimes with a positive
potential are considered. Also, a global existence theorem for the spacetimes
is shown.
| [
{
"created": "Mon, 28 Feb 2005 04:01:19 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Narita",
"Makoto",
""
]
] | We construct a solution satisfying initial conditions for accelerating cosmologies from string/M-theory. Gowdy symmetric spacetimes with a positive potential are considered. Also, a global existence theorem for the spacetimes is shown. |
gr-qc/0001070 | Simon Hern | S. D. Hern (DAMTP, Cambridge) | Coordinate Singularities in Harmonically-sliced Cosmologies | 21 pages, REVTeX, 5 figures | Phys.Rev. D62 (2000) 044003 | 10.1103/PhysRevD.62.044003 | DAMTP-2000-11 | gr-qc | null | Harmonic slicing has in recent years become a standard way of prescribing the
lapse function in numerical simulations of general relativity. However, as was
first noticed by Alcubierre (1997), numerical solutions generated using this
slicing condition can show pathological behaviour. In this paper, analytic and
numer... | [
{
"created": "Sun, 23 Jan 2000 15:43:50 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Hern",
"S. D.",
"",
"DAMTP, Cambridge"
]
] | Harmonic slicing has in recent years become a standard way of prescribing the lapse function in numerical simulations of general relativity. However, as was first noticed by Alcubierre (1997), numerical solutions generated using this slicing condition can show pathological behaviour. In this paper, analytic and numeric... |
2210.16383 | Vasilis Oikonomou | S. Nojiri, S.D. Odintsov, V.K. Oikonomou, A. Constantini | Formalizing Anisotropic Inflation in Modified Gravity | NPB Accepted | null | 10.1016/j.nuclphysb.2022.116011 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the fact that the pre-inflationary era may evolve in an exotic
way, in this work we formalize anisotropic evolution in the context of modified
gravity, focusing on pre-inflationary and near the vicinity of the inflationary
epochs. We specialize on specific metrics like Bianchi and Taub and we
formalize t... | [
{
"created": "Fri, 28 Oct 2022 19:52:57 GMT",
"version": "v1"
}
] | 2022-11-23 | [
[
"Nojiri",
"S.",
""
],
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
],
[
"Constantini",
"A.",
""
]
] | Motivated by the fact that the pre-inflationary era may evolve in an exotic way, in this work we formalize anisotropic evolution in the context of modified gravity, focusing on pre-inflationary and near the vicinity of the inflationary epochs. We specialize on specific metrics like Bianchi and Taub and we formalize the... |
gr-qc/0208078 | Scott H. Hawley | Scott H. Hawley, Matthew W. Choptuik | Numerical evidence for `multi-scalar stars' | Revtex. 4 pages with 4 figures. Submitted to Phys. Rev. D | Phys.Rev. D67 (2003) 024010 | 10.1103/PhysRevD.67.024010 | AEI-2002-062 | gr-qc astro-ph | null | We present a class of general relativistic soliton-like solutions composed of
multiple minimally coupled, massive, real scalar fields which interact only
through the gravitational field. We describe a two-parameter family of
solutions we call ``phase-shifted boson stars'' (parameterized by central
density rho_0 and p... | [
{
"created": "Mon, 26 Aug 2002 14:18:19 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Nov 2002 00:21:57 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Hawley",
"Scott H.",
""
],
[
"Choptuik",
"Matthew W.",
""
]
] | We present a class of general relativistic soliton-like solutions composed of multiple minimally coupled, massive, real scalar fields which interact only through the gravitational field. We describe a two-parameter family of solutions we call ``phase-shifted boson stars'' (parameterized by central density rho_0 and pha... |
1409.6270 | Jonathan Luk | Xinliang An and Jonathan Luk | Trapped surfaces in vacuum arising dynamically from mild incoming
radiation | null | null | null | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the "minimal requirement" on the incoming radiation
that guarantees a trapped surface to form in vacuum. First, we extend the
region of existence in Christodoulou's theorem on the formation of trapped
surfaces and consequently show that the lower bound required to form a trapped
surface can be... | [
{
"created": "Mon, 22 Sep 2014 18:35:07 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Apr 2017 20:18:44 GMT",
"version": "v2"
}
] | 2017-04-26 | [
[
"An",
"Xinliang",
""
],
[
"Luk",
"Jonathan",
""
]
] | In this paper, we study the "minimal requirement" on the incoming radiation that guarantees a trapped surface to form in vacuum. First, we extend the region of existence in Christodoulou's theorem on the formation of trapped surfaces and consequently show that the lower bound required to form a trapped surface can be r... |
2301.04139 | Muhammad Sharif | M. Sharif and Komal Hassan | Electromagnetic Effects on the Complexity of Static Cylindrical Object
in $f(G,T)$ Gravity | 25 pages, 2 figures | Eur. Phys. J. Plus 137(2022)1380 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate complexity of anisotropic cylindrical object
under the influence of electromagnetic field in $f(G,T)$ theory, where $G$ and
$T$ indicate the Gauss-Bonnet term and trace of the stress-energy tensor,
respectively. For this purpose, we calculate the modified field equations,
non-conservatio... | [
{
"created": "Tue, 10 Jan 2023 09:03:01 GMT",
"version": "v1"
}
] | 2023-01-12 | [
[
"Sharif",
"M.",
""
],
[
"Hassan",
"Komal",
""
]
] | In this paper, we investigate complexity of anisotropic cylindrical object under the influence of electromagnetic field in $f(G,T)$ theory, where $G$ and $T$ indicate the Gauss-Bonnet term and trace of the stress-energy tensor, respectively. For this purpose, we calculate the modified field equations, non-conservation ... |
1111.4921 | Roberto Chan | G. Pinheiro, R. Chan | Radiating Shear-Free Gravitational Collapse with Charge | 22 pages, 9 figures. It has been corrected several typos and included
several references. Accepted for publication in GRG | Gen.Rel.Grav.45:243-261,2013 | 10.1007/s10714-012-1468-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new shear free model for the gravitational collapse of a
spherically symmetric charged body. We propose a dissipative contraction with
radiation emitted outwards. The Einstein field equations, using the junction
conditions and an ansatz, are integrated numerically. A check of the energy
conditions is als... | [
{
"created": "Mon, 21 Nov 2011 16:37:53 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Jan 2012 13:18:35 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Oct 2012 14:33:48 GMT",
"version": "v3"
}
] | 2013-01-10 | [
[
"Pinheiro",
"G.",
""
],
[
"Chan",
"R.",
""
]
] | We present a new shear free model for the gravitational collapse of a spherically symmetric charged body. We propose a dissipative contraction with radiation emitted outwards. The Einstein field equations, using the junction conditions and an ansatz, are integrated numerically. A check of the energy conditions is also ... |
1503.08770 | Christian Friedrich Steinwachs | Gianluca Calcagni, Claus Kiefer and Christian F. Steinwachs | What can quantum cosmology say about the inflationary universe? | 13 pages, 2 figures. Contribution to the Proceedings of the DICE14
meeting, Castiglioncello, September 2014 | J. Phys. Conf. Ser. 626 (2015) 1, 012003 | 10.1088/1742-6596/626/1/012003 | FR-PHENO-2015-002 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a method to extract predictions from quantum cosmology for
inflation that can be confronted with observations. Employing the tunneling
boundary condition in quantum geometrodynamics, we derive a probability
distribution for the inflaton field. A sharp peak in this distribution can be
interpreted as setting... | [
{
"created": "Mon, 30 Mar 2015 18:04:36 GMT",
"version": "v1"
}
] | 2015-07-21 | [
[
"Calcagni",
"Gianluca",
""
],
[
"Kiefer",
"Claus",
""
],
[
"Steinwachs",
"Christian F.",
""
]
] | We propose a method to extract predictions from quantum cosmology for inflation that can be confronted with observations. Employing the tunneling boundary condition in quantum geometrodynamics, we derive a probability distribution for the inflaton field. A sharp peak in this distribution can be interpreted as setting t... |
2401.03667 | Dong-Hoon Kim | Dong-Hoon Kim, Chul Min Kim and Sang Pyo Kim | Quantum refraction effects in pulsar radio emission | 14 pages, 5 figures | Published in Monthly Notices of the Royal Astronomical Society,
531, 2148 on 20 May 2024 | 10.1093/mnras/stae1304 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Highly magnetized neutron stars exhibit the vacuum non-linear electrodynamics
effects, which can be well described using the one-loop effective action for
quantum electrodynamics. In this context, we study the propagation and
polarization of pulsar radio emission, based on the post-Maxwellian Lagrangian
from the Heis... | [
{
"created": "Mon, 8 Jan 2024 05:14:25 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jun 2024 03:15:27 GMT",
"version": "v2"
}
] | 2024-06-13 | [
[
"Kim",
"Dong-Hoon",
""
],
[
"Kim",
"Chul Min",
""
],
[
"Kim",
"Sang Pyo",
""
]
] | Highly magnetized neutron stars exhibit the vacuum non-linear electrodynamics effects, which can be well described using the one-loop effective action for quantum electrodynamics. In this context, we study the propagation and polarization of pulsar radio emission, based on the post-Maxwellian Lagrangian from the Heisen... |
2004.02636 | Marie-No\"elle C\'el\'erier | Marie-No\"elle C\'el\'erier and Nilton O. Santos | Stationary cylindrical anisotropic fluid and new purely magnetic GR
solutions | 26 pages, 0 figure | Phys. Rev. D 102, 044026 (2020) | 10.1103/PhysRevD.102.044026 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The properties of interior spacetimes sourced by stationary cylindrical
anisotropic fluids are here analytically studied for both nonrigid and rigid
rotation. As regards nonrigid rotation, this is, to our knowledge, the first
work dedicated to such a study. We give here a complete equation set describing
these spacet... | [
{
"created": "Fri, 3 Apr 2020 10:28:56 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Aug 2020 13:55:40 GMT",
"version": "v2"
}
] | 2020-08-19 | [
[
"Célérier",
"Marie-Noëlle",
""
],
[
"Santos",
"Nilton O.",
""
]
] | The properties of interior spacetimes sourced by stationary cylindrical anisotropic fluids are here analytically studied for both nonrigid and rigid rotation. As regards nonrigid rotation, this is, to our knowledge, the first work dedicated to such a study. We give here a complete equation set describing these spacetim... |
2401.11591 | Francesco Bajardi | Francesco Bajardi and Daniel Blixt | Primary constraints in general teleparallel quadratic gravity | 24 pages, 1 Figure and 1 Table; Accepted for publication in Physical
Review D | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The primary constraints for general teleparallel quadratic gravity are
presented. They provide a basic classification of teleparallel theories from
the perspective of the full nonlinear theory and represent the first step
towards a full-fledged Hamiltonian analysis. The results are consistent with
the limit of metric... | [
{
"created": "Sun, 21 Jan 2024 20:43:08 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jan 2024 17:07:07 GMT",
"version": "v2"
},
{
"created": "Fri, 26 Apr 2024 12:39:59 GMT",
"version": "v3"
}
] | 2024-04-29 | [
[
"Bajardi",
"Francesco",
""
],
[
"Blixt",
"Daniel",
""
]
] | The primary constraints for general teleparallel quadratic gravity are presented. They provide a basic classification of teleparallel theories from the perspective of the full nonlinear theory and represent the first step towards a full-fledged Hamiltonian analysis. The results are consistent with the limit of metric a... |
1510.02076 | Mariano Cadoni | Mariano Cadoni and Edgardo Franzin | Black holes sourced by a massless scalar | Talk given at the Karl Schwarzschild Meeting 2015 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct asymptotically flat black hole solutions of Einstein-scalar
gravity sourced by a nontrivial scalar field with 1/r asymptotic behaviour.
Near the singularity the black hole behaves as the Janis-Newmann-Winicour-Wyman
solution. The hairy black hole solutions allow for a consistent thermodynamical
descripti... | [
{
"created": "Wed, 7 Oct 2015 19:50:38 GMT",
"version": "v1"
}
] | 2015-10-08 | [
[
"Cadoni",
"Mariano",
""
],
[
"Franzin",
"Edgardo",
""
]
] | We construct asymptotically flat black hole solutions of Einstein-scalar gravity sourced by a nontrivial scalar field with 1/r asymptotic behaviour. Near the singularity the black hole behaves as the Janis-Newmann-Winicour-Wyman solution. The hairy black hole solutions allow for a consistent thermodynamical description... |
gr-qc/0104056 | null | S. Q. Wu and X. Cai | Asymmetry of Hawking Radiation of Dirac Particles in a Charged Vaidya -
de Sitter Black Hole | 10 pages in 12pt Revtex, no figure, to appear in Int. J. Theor. Phys.
Vol. 40, No.7 (2001) | Int.J.Theor.Phys. 40 (2001) 1349-1357 | null | null | gr-qc | null | The Hawking radiation of Dirac particles in a charged Vaidya - de Sitter
black hole is investigated by using the method of generalized tortoise
coordinate transformation. It is shown that the Hawking radiation of Dirac
particles does not exist for $P_1, Q_2$ components, but for $P_2, Q_1$
components it does. Both the... | [
{
"created": "Wed, 18 Apr 2001 02:29:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wu",
"S. Q.",
""
],
[
"Cai",
"X.",
""
]
] | The Hawking radiation of Dirac particles in a charged Vaidya - de Sitter black hole is investigated by using the method of generalized tortoise coordinate transformation. It is shown that the Hawking radiation of Dirac particles does not exist for $P_1, Q_2$ components, but for $P_2, Q_1$ components it does. Both the l... |
1509.03135 | Saskia Grunau | Kai Flathmann and Saskia Grunau | Analytic solutions of the geodesic equation for
Einstein-Maxwell-dilaton-axion black holes | title changed due to request of Physical Review D; journal reference
added | Phys. Rev. D 92, 104027 (2015) | 10.1103/PhysRevD.92.104027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we study the geodesic motion of test particles and light in
the Einstein-Maxwell-Dilaton-Axion black hole spacetime. We derive the
equations of motion and present their solutions in terms of the Weierstra{\ss}
$\wp$-, $\sigma$- and $\zeta$-functions. With the help of parametric diagrams
and effective ... | [
{
"created": "Thu, 10 Sep 2015 13:07:29 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Nov 2015 08:46:10 GMT",
"version": "v2"
}
] | 2015-11-13 | [
[
"Flathmann",
"Kai",
""
],
[
"Grunau",
"Saskia",
""
]
] | In this article we study the geodesic motion of test particles and light in the Einstein-Maxwell-Dilaton-Axion black hole spacetime. We derive the equations of motion and present their solutions in terms of the Weierstra{\ss} $\wp$-, $\sigma$- and $\zeta$-functions. With the help of parametric diagrams and effective po... |
gr-qc/9808046 | Giovanni Amelino-Camelia | Giovanni Amelino-Camelia | Dimensionful deformations of Poincare' symmetries for a Quantum Gravity
without ideal observers | 7 pages, Latex. (This essay received an ``honorable mention'' from
the Gravity Research Foundation, 1998-Ed.) | Mod.Phys.Lett. A13 (1998) 1319-1325 | 10.1142/S0217732398001376 | NEIP-98-004 | gr-qc | null | Quantum Mechanics is revisited as the appropriate theoretical framework for
the description of the outcome of experiments that rely on the use of classical
devices. In particular, it is emphasized that the limitations on the
measurability of (pairs of conjugate) observables encoded in the formalism of
Quantum Mechani... | [
{
"created": "Mon, 17 Aug 1998 14:50:32 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Amelino-Camelia",
"Giovanni",
""
]
] | Quantum Mechanics is revisited as the appropriate theoretical framework for the description of the outcome of experiments that rely on the use of classical devices. In particular, it is emphasized that the limitations on the measurability of (pairs of conjugate) observables encoded in the formalism of Quantum Mechanics... |
1204.3346 | Stanley P. Gudder | Stan Gudder | A Matter of Matter and Antimatter | 22 pages, including 1 figure | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A discrete quantum gravity model given by a quantum sequential growth process
(QSGP) is considered. The QSGP describes the growth of causal sets (causets)
one element at a time in discrete steps. It is shown that the set $\pscript$ of
causets can be partitioned into three subsets $\pscript = (\rmant)\cup
(\rmmix)\cup... | [
{
"created": "Mon, 16 Apr 2012 02:30:52 GMT",
"version": "v1"
}
] | 2012-04-17 | [
[
"Gudder",
"Stan",
""
]
] | A discrete quantum gravity model given by a quantum sequential growth process (QSGP) is considered. The QSGP describes the growth of causal sets (causets) one element at a time in discrete steps. It is shown that the set $\pscript$ of causets can be partitioned into three subsets $\pscript = (\rmant)\cup (\rmmix)\cup (... |
0904.4295 | Victor M. Villalba | Clara Rojas, Victor M. Villalba | Computation of inflationary cosmological perturbations in chaotic
inflationary scenarios using the phase-integral method | 21 pages, RevTex, to appear in Phys. Rev D | Phys.Rev.D79:103502,2009 | 10.1103/PhysRevD.79.103502 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The phase-integral approximation devised by Fr\"oman and Fr\"oman, is used
for computing cosmological perturbations in the quadratic chaotic inflationary
model. The phase-integral formulas for the scalar and tensor power spectra are
explicitly obtained up to fifth order of the phase-integral approximation. We
show th... | [
{
"created": "Tue, 28 Apr 2009 02:33:57 GMT",
"version": "v1"
}
] | 2009-10-29 | [
[
"Rojas",
"Clara",
""
],
[
"Villalba",
"Victor M.",
""
]
] | The phase-integral approximation devised by Fr\"oman and Fr\"oman, is used for computing cosmological perturbations in the quadratic chaotic inflationary model. The phase-integral formulas for the scalar and tensor power spectra are explicitly obtained up to fifth order of the phase-integral approximation. We show that... |
gr-qc/0505052 | Jorge Pullin | Rodolfo Gambini and Jorge Pullin | Classical and quantum general relativity: a new paradigm | 8 pages, one figure, fifth prize of the Gravity Research Foundation
2005 essay competition | Gen.Rel.Grav.37:1689-1694,2005; Int.J.Mod.Phys.D14:2355-2360,2005 | 10.1142/S0218271805007917 10.1007/s10714-005-0151-7 | LSU-REL-051105 | gr-qc | null | We argue that recent developments in discretizations of classical and quantum
gravity imply a new paradigm for doing research in these areas. The paradigm
consists in discretizing the theory in such a way that the resulting discrete
theory has no constraints. This solves many of the hard conceptual problems of
quantu... | [
{
"created": "Wed, 11 May 2005 16:09:31 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
]
] | We argue that recent developments in discretizations of classical and quantum gravity imply a new paradigm for doing research in these areas. The paradigm consists in discretizing the theory in such a way that the resulting discrete theory has no constraints. This solves many of the hard conceptual problems of quantum ... |
1201.1640 | Alberto Carrasco Ferreira | Alberto Carrasco Ferreira | Trapped surfaces in spacetimes with symmetries and applications to
uniqueness theorems | 180 pages, 23 figures, Ph.D. Dissertation | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main aim of this thesis is to study the properties of trapped surfaces in
spacetimes with symmetries and their possible relation with the theory of black
holes. We will concetrate specially on one aspect of this possible equivalence,
namely whether the static black hole uniqueness theorems extend to static
spacet... | [
{
"created": "Sun, 8 Jan 2012 16:34:20 GMT",
"version": "v1"
}
] | 2015-03-20 | [
[
"Ferreira",
"Alberto Carrasco",
""
]
] | The main aim of this thesis is to study the properties of trapped surfaces in spacetimes with symmetries and their possible relation with the theory of black holes. We will concetrate specially on one aspect of this possible equivalence, namely whether the static black hole uniqueness theorems extend to static spacetim... |
1611.08106 | Julien Serreau | Maxime Guilleux and Julien Serreau | Nonperturbative renormalization group for scalar fields in de Sitter
space: beyond the local potential approximation | 19 pages, 4 figures ; Published version (PRD) | Phys. Rev. D 95, 045003 (2017) | 10.1103/PhysRevD.95.045003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nonperturbative renormalization group techniques have recently proven a
powerful tool to tackle the nontrivial infrared dynamics of light scalar fields
in de Sitter space. In the present article, we develop the formalism beyond the
local potential approximation employed in earlier works. In particular, we
consider th... | [
{
"created": "Thu, 24 Nov 2016 09:07:35 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Feb 2017 10:42:09 GMT",
"version": "v2"
}
] | 2017-02-22 | [
[
"Guilleux",
"Maxime",
""
],
[
"Serreau",
"Julien",
""
]
] | Nonperturbative renormalization group techniques have recently proven a powerful tool to tackle the nontrivial infrared dynamics of light scalar fields in de Sitter space. In the present article, we develop the formalism beyond the local potential approximation employed in earlier works. In particular, we consider the ... |
1910.00156 | Ulises Nucamendi | Ulises Nucamendi, Ricardo Becerril, Pankaj Sheoran | Bounds on spinning particles in their innermost stable circular orbits
around rotating braneworld black hole | 14 pages, 7 figures | Eur. Phys. J. C (2020) 80:35 | 10.1140/epjc/s10052-019-7584-8 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the innermost stable circular orbit (ISCO) of a spinning test
particle moving in the vicinity of an axially symmetric rotating braneworld
black hole (BH). We start with the description of the event horizon, static
limit surface and ergosphere region of such BH and bring out the effect of
tidal charge paramet... | [
{
"created": "Tue, 1 Oct 2019 00:12:20 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Jan 2020 18:22:41 GMT",
"version": "v2"
}
] | 2020-01-24 | [
[
"Nucamendi",
"Ulises",
""
],
[
"Becerril",
"Ricardo",
""
],
[
"Sheoran",
"Pankaj",
""
]
] | We study the innermost stable circular orbit (ISCO) of a spinning test particle moving in the vicinity of an axially symmetric rotating braneworld black hole (BH). We start with the description of the event horizon, static limit surface and ergosphere region of such BH and bring out the effect of tidal charge parameter... |
0901.2437 | Mark Hannam | Mark Hannam, Sascha Husa, John G. Baker, Michael Boyle, Bernd
Bruegmann, Tony Chu, Nils Dorband, Frank Herrmann, Ian Hinder, Bernard J.
Kelly, Lawrence E. Kidder, Pablo Laguna, Keith D. Matthews, James R. van
Meter, Harald P. Pfeiffer, Denis Pollney, Christian Reisswig, Mark A. Scheel,
Deirdre Shoemaker | The Samurai Project: verifying the consistency of black-hole-binary
waveforms for gravitational-wave detection | 17 pages, 9 figures. Version accepted by PRD | Phys.Rev.D79:084025,2009 | 10.1103/PhysRevD.79.084025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We quantify the consistency of numerical-relativity black-hole-binary
waveforms for use in gravitational-wave (GW) searches with current and planned
ground-based detectors. We compare previously published results for the
$(\ell=2,| m | =2)$ mode of the gravitational waves from an equal-mass
nonspinning binary, calcul... | [
{
"created": "Fri, 16 Jan 2009 11:32:22 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Jan 2009 14:50:59 GMT",
"version": "v2"
},
{
"created": "Fri, 27 Mar 2009 14:56:12 GMT",
"version": "v3"
}
] | 2010-04-14 | [
[
"Hannam",
"Mark",
""
],
[
"Husa",
"Sascha",
""
],
[
"Baker",
"John G.",
""
],
[
"Boyle",
"Michael",
""
],
[
"Bruegmann",
"Bernd",
""
],
[
"Chu",
"Tony",
""
],
[
"Dorband",
"Nils",
""
],
[
"Herrmann"... | We quantify the consistency of numerical-relativity black-hole-binary waveforms for use in gravitational-wave (GW) searches with current and planned ground-based detectors. We compare previously published results for the $(\ell=2,| m | =2)$ mode of the gravitational waves from an equal-mass nonspinning binary, calculat... |
gr-qc/0011049 | Ulises Nucamendi | Ulises Nucamendi, Marcelo Salgado and Daniel Sudarsky | An alternative approach to the galactic dark matter problem | 36 pages, 12 figures, Revtex, a brief discussion added, accepted for
publication in PRD | Phys.Rev.D63:125016,2001 | 10.1103/PhysRevD.63.125016 | null | gr-qc astro-ph | null | We discuss scenarios in which the galactic dark matter in spiral galaxies is
described by a long range coherent field which settles in a stationary
configuration that might account for the features of the galactic rotation
curves. The simplest possibility is to consider scalar fields, so we discuss in
particular, two... | [
{
"created": "Tue, 14 Nov 2000 15:57:47 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Feb 2001 11:29:30 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Nucamendi",
"Ulises",
""
],
[
"Salgado",
"Marcelo",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | We discuss scenarios in which the galactic dark matter in spiral galaxies is described by a long range coherent field which settles in a stationary configuration that might account for the features of the galactic rotation curves. The simplest possibility is to consider scalar fields, so we discuss in particular, two m... |
2310.08046 | Javlon Rayimbaev Javlon | Sardor Murodov, Javlon Rayimbaev, Bobomurat Ahmedov, Abdullo Hakimov | Dynamics of particles with electric charge and magnetic dipole moment
near Schwarzschild-MOG black hole | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Investigations of electromagnetic interactions between test-charged and
magnetized particles are important in the dynamics of the particles in strong
gravitational fields around black holes. Here, we study the dynamics of a
particle having an electric charge and a magnetic dipole moment in the
spacetime of a Schwarzs... | [
{
"created": "Thu, 12 Oct 2023 05:39:28 GMT",
"version": "v1"
}
] | 2023-10-13 | [
[
"Murodov",
"Sardor",
""
],
[
"Rayimbaev",
"Javlon",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Hakimov",
"Abdullo",
""
]
] | Investigations of electromagnetic interactions between test-charged and magnetized particles are important in the dynamics of the particles in strong gravitational fields around black holes. Here, we study the dynamics of a particle having an electric charge and a magnetic dipole moment in the spacetime of a Schwarzsch... |
gr-qc/9911079 | Hiroshi Umetsu | Hisao Suzuki, Eiichi Takasugi and Hiroshi Umetsu | Absorption rate of the Kerr-de Sitter black hole and the Kerr-Newman-de
Sitter black hole | 11 pages, LaTeX. Several typos are corrected | Prog.Theor.Phys. 103 (2000) 723-731 | 10.1143/PTP.103.723 | EPHOU 99-012, OU-HET-333 | gr-qc | null | By using an analytic solution of the Teukolsky equation in the Kerr-de Sitter
and Kerr-Newman-de Sitter geometries, an analytic expression of the absorption
rate formulae for these black holes is calculated.
| [
{
"created": "Mon, 22 Nov 1999 06:48:27 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Mar 2000 09:42:42 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Suzuki",
"Hisao",
""
],
[
"Takasugi",
"Eiichi",
""
],
[
"Umetsu",
"Hiroshi",
""
]
] | By using an analytic solution of the Teukolsky equation in the Kerr-de Sitter and Kerr-Newman-de Sitter geometries, an analytic expression of the absorption rate formulae for these black holes is calculated. |
2211.16900 | Elisa Maggio | Elisa Maggio | Probing new physics on the horizon of black holes with gravitational
waves | PhD thesis, 160 pages | null | null | null | gr-qc astro-ph.HE hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | Black holes are the most compact objects in the Universe. According to
general relativity, black holes have a horizon that hides a singularity where
Einstein's theory breaks down. Recently, gravitational waves opened the
possibility to probe the existence of horizons and investigate the nature of
compact objects. Thi... | [
{
"created": "Wed, 30 Nov 2022 10:58:31 GMT",
"version": "v1"
}
] | 2022-12-01 | [
[
"Maggio",
"Elisa",
""
]
] | Black holes are the most compact objects in the Universe. According to general relativity, black holes have a horizon that hides a singularity where Einstein's theory breaks down. Recently, gravitational waves opened the possibility to probe the existence of horizons and investigate the nature of compact objects. This ... |
1605.03942 | Matti Raasakka | Matti Raasakka | Spacetime-Free Approach to Quantum Theory and Effective Spacetime
Structure | null | SIGMA 13 (2017), 006, 33 pages | 10.3842/SIGMA.2017.006 | null | gr-qc hep-th math-ph math.MP quant-ph | http://creativecommons.org/licenses/by-sa/4.0/ | Motivated by hints of the effective emergent nature of spacetime structure,
we formulate a spacetime-free algebraic framework for quantum theory, in which
no a priori background geometric structure is required. Such a framework is
necessary in order to study the emergence of effective spacetime structure in a
consist... | [
{
"created": "Thu, 12 May 2016 19:25:58 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Jan 2017 05:05:45 GMT",
"version": "v2"
}
] | 2017-01-25 | [
[
"Raasakka",
"Matti",
""
]
] | Motivated by hints of the effective emergent nature of spacetime structure, we formulate a spacetime-free algebraic framework for quantum theory, in which no a priori background geometric structure is required. Such a framework is necessary in order to study the emergence of effective spacetime structure in a consisten... |
1008.2805 | Muhammad Sharif | M. Sharif and G. Abbas | Gravitational Collapse: Expanding and Collapsing Regions | 12 pages, 4 figures, accepted for publication in Gen. Relativ. Grav | Gen.Rel.Grav.43:1179-1188,2011 | 10.1007/s10714-010-0952-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the expanding and collapsing regions by taking two well-known
spherically symmetric spacetimes. For this purpose, the general formalism is
developed by using Israel junction conditions for arbitrary spacetimes. This
has been used to obtain the surface energy density and the tangential pressure.
The min... | [
{
"created": "Tue, 17 Aug 2010 02:30:38 GMT",
"version": "v1"
}
] | 2011-03-28 | [
[
"Sharif",
"M.",
""
],
[
"Abbas",
"G.",
""
]
] | We investigate the expanding and collapsing regions by taking two well-known spherically symmetric spacetimes. For this purpose, the general formalism is developed by using Israel junction conditions for arbitrary spacetimes. This has been used to obtain the surface energy density and the tangential pressure. The minim... |
1512.04566 | Tommaso De Lorenzo | Tommaso De Lorenzo and Alejandro Perez | Improved Black Hole Fireworks: Asymmetric Black-Hole-to-White-Hole
Tunneling Scenario | 18 Pages, 6 Figures | Phys. Rev. D 93, 124018 (2016) | 10.1103/PhysRevD.93.124018 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new scenario for gravitational collapse has been recently proposed by
Haggard and Rovelli. Presenting the model under the name of black hole
fireworks, they claim that the accumulation of quantum gravitational effects
outside the horizon can cause the tunneling of geometry from a black hole to a
white hole, allowin... | [
{
"created": "Mon, 14 Dec 2015 21:34:03 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jun 2016 15:29:04 GMT",
"version": "v2"
}
] | 2016-06-08 | [
[
"De Lorenzo",
"Tommaso",
""
],
[
"Perez",
"Alejandro",
""
]
] | A new scenario for gravitational collapse has been recently proposed by Haggard and Rovelli. Presenting the model under the name of black hole fireworks, they claim that the accumulation of quantum gravitational effects outside the horizon can cause the tunneling of geometry from a black hole to a white hole, allowing ... |
2403.11540 | Jo\~ao Lu\'is Rosa | Jo\~ao Lu\'is Rosa, Joaqu\'in Pelle, Daniela P\'erez | Accretion disks and relativistic line broadening in boson star
spacetimes | 13 pages, 7 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we analyze the observational properties of static, spherically
symmetric boson stars with fourth and sixth-order self-interactions, using the
Julia-based general-relativistic radiative transfer code Skylight. We assume
the boson stars are surrounded by an optically thick, geometrically thin
accretion di... | [
{
"created": "Mon, 18 Mar 2024 07:48:25 GMT",
"version": "v1"
}
] | 2024-03-19 | [
[
"Rosa",
"João Luís",
""
],
[
"Pelle",
"Joaquín",
""
],
[
"Pérez",
"Daniela",
""
]
] | In this work, we analyze the observational properties of static, spherically symmetric boson stars with fourth and sixth-order self-interactions, using the Julia-based general-relativistic radiative transfer code Skylight. We assume the boson stars are surrounded by an optically thick, geometrically thin accretion disk... |
2105.11623 | Adam D. Helfer | Adam D. Helfer | Center-of-mass ambiguity for Bondi-Metzner-Sachs charges | 7 pages. This is the Accepted Manuscript version of an article
accepted for publication in Classical and Quantum Gravity. IOP Publishing Ltd
is not responsible for any errors or omissions in this version of the
manuscript or any version derived from it. The Version of Record is available
online at 10.1088/1361-... | Class. Quantum Grav. 38 (2021) 12LT01 | 10.1088/1361-6382/abfc2e | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Dray and Streubel proposed a definition of angular momentum in general
relativity based on `Bondi-Metzner-Sachs (BMS) charges'. I show here that the
natural definition of center of mass in this program has an
infinite-dimensional ambiguity. (This seems not to have been noticed before
because previous work has tacitly... | [
{
"created": "Tue, 25 May 2021 02:39:22 GMT",
"version": "v1"
}
] | 2021-05-26 | [
[
"Helfer",
"Adam D.",
""
]
] | Dray and Streubel proposed a definition of angular momentum in general relativity based on `Bondi-Metzner-Sachs (BMS) charges'. I show here that the natural definition of center of mass in this program has an infinite-dimensional ambiguity. (This seems not to have been noticed before because previous work has tacitly c... |
1205.6009 | Manuel Tiglio | Frank Herrmann, Scott E. Field, Chad R. Galley, Evan Ochsner, Manuel
Tiglio | Towards beating the curse of dimensionality for gravitational waves
using Reduced Basis | null | null | 10.1103/PhysRevD.86.084046 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the Reduced Basis approach, we efficiently compress and accurately
represent the space of waveforms for non-precessing binary black hole
inspirals, which constitutes a four dimensional parameter space (two masses,
two spin magnitudes). Compared to the non-spinning case, we find that only a
{\it marginal} increa... | [
{
"created": "Sun, 27 May 2012 23:19:25 GMT",
"version": "v1"
}
] | 2013-05-30 | [
[
"Herrmann",
"Frank",
""
],
[
"Field",
"Scott E.",
""
],
[
"Galley",
"Chad R.",
""
],
[
"Ochsner",
"Evan",
""
],
[
"Tiglio",
"Manuel",
""
]
] | Using the Reduced Basis approach, we efficiently compress and accurately represent the space of waveforms for non-precessing binary black hole inspirals, which constitutes a four dimensional parameter space (two masses, two spin magnitudes). Compared to the non-spinning case, we find that only a {\it marginal} increase... |
0907.4087 | Luca Lusanna | David Alba and Luca Lusanna | The Einstein-Maxwell-Particle System in the York Canonical Basis of ADM
Tetrad Gravity: I) The Equations of Motion in Arbitrary Schwinger Time Gauges | 108 pages. Revised version with improved presentation, rewriting of
Appendix A, inclusion of the explicit form of the Bianchi identity for the
energy-momentum tensor, corrected typos and update of references | null | null | null | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the coupling of N charged scalar particles plus the electro-magnetic
field to ADM tetrad gravity and its canonical formulation in asymptotically
Minkowskian space-times without super-translations. We make the canonical
transformation to the York canonical basis, where there is a separation between
the {\it i... | [
{
"created": "Thu, 23 Jul 2009 14:48:21 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Dec 2009 11:33:53 GMT",
"version": "v2"
},
{
"created": "Thu, 9 Sep 2010 13:53:56 GMT",
"version": "v3"
},
{
"created": "Tue, 26 Apr 2011 12:42:05 GMT",
"version": "v4"
}
] | 2011-04-27 | [
[
"Alba",
"David",
""
],
[
"Lusanna",
"Luca",
""
]
] | We study the coupling of N charged scalar particles plus the electro-magnetic field to ADM tetrad gravity and its canonical formulation in asymptotically Minkowskian space-times without super-translations. We make the canonical transformation to the York canonical basis, where there is a separation between the {\it ine... |
gr-qc/9505013 | Kiyoshi Kamimura | Takeshi FUKUYAMA, Kiyoshi Kamimura, Songju YU | Toda Lattice and Tomimatsu-Sato Solutions | LaTeX 8 pages | J.Phys.Soc.Jap. 64 (1995) 3201-3206 | 10.1143/JPSJ.64.3201 | Rits-TH-9511, TOHO-FP-9551 | gr-qc | null | We discuss an analytic proof of a conjecture (Nakamura) that solutions of
Toda molecule equation give those of Ernst equation giving Tomimatsu-Sato
solutions of Einstein equation. Using Pfaffian identities it is shown for Weyl
solutions completely and for generic cases partially.
| [
{
"created": "Thu, 11 May 1995 02:47:49 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"FUKUYAMA",
"Takeshi",
""
],
[
"Kamimura",
"Kiyoshi",
""
],
[
"YU",
"Songju",
""
]
] | We discuss an analytic proof of a conjecture (Nakamura) that solutions of Toda molecule equation give those of Ernst equation giving Tomimatsu-Sato solutions of Einstein equation. Using Pfaffian identities it is shown for Weyl solutions completely and for generic cases partially. |
2203.02924 | Gui-Rong Liang | Haiyuan Feng (1), Miao Li (1), Gui-Rong Liang (1) and Rong-Jia Yang
(2) ((1) Department of Physics, Southern University of Science and
Technology, (2) College of Physical Science and Technology, Hebei University) | Adiabatic accretion onto black holes in Einstein-Maxwell-scalar theory | 17 pages, 4 figures | null | 10.1088/1475-7516/2022/04/027 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We study the adiabatic accretion process of ordinary baryonic gas onto
spherically symmetric black holes in Einstein-Maxwell-scalar theory, with two
parameters $\alpha$ and $\beta$ in the coupling term. Especially, we
demonstrate the range of the transonic points in terms of the charge-to-mass
ratio squared and the d... | [
{
"created": "Sun, 6 Mar 2022 09:53:48 GMT",
"version": "v1"
}
] | 2022-04-27 | [
[
"Feng",
"Haiyuan",
""
],
[
"Li",
"Miao",
""
],
[
"Liang",
"Gui-Rong",
""
],
[
"Yang",
"Rong-Jia",
""
]
] | We study the adiabatic accretion process of ordinary baryonic gas onto spherically symmetric black holes in Einstein-Maxwell-scalar theory, with two parameters $\alpha$ and $\beta$ in the coupling term. Especially, we demonstrate the range of the transonic points in terms of the charge-to-mass ratio squared and the dim... |
1611.00809 | Michael Good | Michael R.R. Good, Khalykbek Yelshibekov, Yen Chin Ong | On Horizonless Temperature with an Accelerating Mirror | 25 pages, 12 figures, v2 closely resembles the published version | J. High Energ. Phys. (2017) 2017: 13 | 10.1007/JHEP03(2017)013 | NORDITA-2016-115 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new solution of a unitary moving mirror is found to produce finite energy
and emit thermal radiation despite the absence of an acceleration horizon. In
the limit that the mirror approaches the speed of light, the model corresponds
to a black hole formed from the collapse of a null shell. For speeds less than
light,... | [
{
"created": "Mon, 31 Oct 2016 05:28:00 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Mar 2017 11:06:29 GMT",
"version": "v2"
}
] | 2017-03-07 | [
[
"Good",
"Michael R. R.",
""
],
[
"Yelshibekov",
"Khalykbek",
""
],
[
"Ong",
"Yen Chin",
""
]
] | A new solution of a unitary moving mirror is found to produce finite energy and emit thermal radiation despite the absence of an acceleration horizon. In the limit that the mirror approaches the speed of light, the model corresponds to a black hole formed from the collapse of a null shell. For speeds less than light, t... |
2309.08350 | Marek Rogatko | Marek Rogatko | Uniqueness of dark matter magnetized static black hole spacetime | 23 pages, RevTEx, to be published in Phys.Rev.D15 | null | 10.1103/PhysRevD.108.064026 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Uniqueness problem of static axially symmetric black hole in magnetic
Universe filled with {\it dark matter} component has been considered. The {\it
dark matter} model comprises the additional $U(1)$-gauge field ({\it dark
photon}) interacting with Maxwell one by the kinetic mixing term. We show that
all the solution... | [
{
"created": "Fri, 15 Sep 2023 12:17:37 GMT",
"version": "v1"
}
] | 2023-09-18 | [
[
"Rogatko",
"Marek",
""
]
] | Uniqueness problem of static axially symmetric black hole in magnetic Universe filled with {\it dark matter} component has been considered. The {\it dark matter} model comprises the additional $U(1)$-gauge field ({\it dark photon}) interacting with Maxwell one by the kinetic mixing term. We show that all the solutions ... |
1110.4257 | Mohammad Nouri-Zonoz | B. Nazari and M. Nouri-Zonoz | Electromagnetic Casimir effect and the spacetime index of refraction | 16 pages, REVTeX 4, Replaced with the published version | Phys. Rev. D 85, 044060 (2012) | 10.1103/PhysRevD.85.044060 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In [5] we investigated the response of vacuum energy to a gravitational field
by considering a Casimir apparatus in a weak gravitational field. Our approach
was based on a conjecture involving the interpretation of spacetime as a
refractive medium and its effect on vacuum energy composed of virtual massless
scalar pa... | [
{
"created": "Wed, 19 Oct 2011 12:20:56 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Feb 2012 13:50:42 GMT",
"version": "v2"
}
] | 2012-03-01 | [
[
"Nazari",
"B.",
""
],
[
"Nouri-Zonoz",
"M.",
""
]
] | In [5] we investigated the response of vacuum energy to a gravitational field by considering a Casimir apparatus in a weak gravitational field. Our approach was based on a conjecture involving the interpretation of spacetime as a refractive medium and its effect on vacuum energy composed of virtual massless scalar part... |
2210.09663 | Stefan Czimek | Stefan Czimek, Igor Rodnianski | Obstruction-free gluing for the Einstein equations | 81 pages, 5 figures | null | null | null | gr-qc math-ph math.AP math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we develop a new approach to the gluing problem in General
Relativity, that is, the problem of matching two solutions of the Einstein
equations along a spacelike or characteristic (null) hypersurface. In contrast
to the previous constructions, the new perspective actively utilizes the
nonlinearity of th... | [
{
"created": "Tue, 18 Oct 2022 08:03:33 GMT",
"version": "v1"
}
] | 2022-10-19 | [
[
"Czimek",
"Stefan",
""
],
[
"Rodnianski",
"Igor",
""
]
] | In this paper we develop a new approach to the gluing problem in General Relativity, that is, the problem of matching two solutions of the Einstein equations along a spacelike or characteristic (null) hypersurface. In contrast to the previous constructions, the new perspective actively utilizes the nonlinearity of the ... |
1811.00831 | Natalia Kharuk | N.V. Kharuk, S.N. Manida, S.A. Paston, A.A. Sheykin | Modifying the theory of gravity by changing independent variables | LaTeX, 6 pages, based on a talk given at the XXth International
Seminar on High Energy Physics (QUARKS-2018), Valday, Russia, May 27 - June
2, 2018 | EPJ Web of Conferences 191, 07007 (2018) | 10.1051/epjconf/201819107007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study some particular modifications of gravity in search for a natural way
to unify the gravitational and electromagnetic interaction. The certain
components of connection in the appearing variants of the theory can be
identified with electromagnetic potential. The methods of adding matter in the
form of scalar an... | [
{
"created": "Fri, 2 Nov 2018 12:17:52 GMT",
"version": "v1"
}
] | 2018-11-05 | [
[
"Kharuk",
"N. V.",
""
],
[
"Manida",
"S. N.",
""
],
[
"Paston",
"S. A.",
""
],
[
"Sheykin",
"A. A.",
""
]
] | We study some particular modifications of gravity in search for a natural way to unify the gravitational and electromagnetic interaction. The certain components of connection in the appearing variants of the theory can be identified with electromagnetic potential. The methods of adding matter in the form of scalar and ... |
1006.3327 | Owen Pavel Fernandez Piedra | Owen Pavel Fern\'andez Piedra | Gravitino perturbations in Schwarzschild black holes | null | Int.J.Mod.Phys.D20:93-109,2011 | 10.1142/S0218271811018676 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the time evolution of massless gravitino perturbations in
Schwarzschild black holes, and show that as in the case of fields of other
values of spin, the evolution comes in three stages, after an initial outburst
as a first stage, we observe the damped oscillations characteristic of the
quasinormal ringing... | [
{
"created": "Wed, 16 Jun 2010 21:10:15 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Jul 2010 17:23:17 GMT",
"version": "v2"
}
] | 2011-02-09 | [
[
"Piedra",
"Owen Pavel Fernández",
""
]
] | We consider the time evolution of massless gravitino perturbations in Schwarzschild black holes, and show that as in the case of fields of other values of spin, the evolution comes in three stages, after an initial outburst as a first stage, we observe the damped oscillations characteristic of the quasinormal ringing s... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.