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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2304.12126 | Yu Shi | Dawei Wu, Shan-Chang Tang, Yu Shi | Birth and death of entanglement between two accelerating Unruh-DeWitt
detectors coupled with a scalar field | 25 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider two accelerating Unruh-DeWitt detectors coupled linearly or
quadratically with a scalar field. We show that entanglement can be created by
acceleration, and is divergent only when the two detectors coincide. For linear
coupling, entanglment decreases monotonically with the increase of
acceleration. For qu... | [
{
"created": "Mon, 24 Apr 2023 14:30:33 GMT",
"version": "v1"
}
] | 2023-04-25 | [
[
"Wu",
"Dawei",
""
],
[
"Tang",
"Shan-Chang",
""
],
[
"Shi",
"Yu",
""
]
] | We consider two accelerating Unruh-DeWitt detectors coupled linearly or quadratically with a scalar field. We show that entanglement can be created by acceleration, and is divergent only when the two detectors coincide. For linear coupling, entanglment decreases monotonically with the increase of acceleration. For quad... |
2003.00458 | Shao-Wen Wei | Shao-Wen Wei, Yu-Xiao Liu | New insights into thermodynamics and microstructure of AdS black holes | 4 pages, 1 figure. Invited News & Views by Science Bulletin | Science Bulletin 65 (2020) 259-261 | 10.1016/j.scib.2019.11.020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, black hole thermodynamics and phase transition have been studied in
the extended phase space. Besides the VdW-like phase transition, more
interesting phase transitions were found. More interestingly, combining with
the thermodynamic geometry, the microstructure of black holes was
investigated.In this paper,... | [
{
"created": "Sun, 1 Mar 2020 10:29:00 GMT",
"version": "v1"
}
] | 2020-03-03 | [
[
"Wei",
"Shao-Wen",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | Recently, black hole thermodynamics and phase transition have been studied in the extended phase space. Besides the VdW-like phase transition, more interesting phase transitions were found. More interestingly, combining with the thermodynamic geometry, the microstructure of black holes was investigated.In this paper, w... |
gr-qc/0109037 | Alan Barnes | Alan Barnes | On the Symmetries of the Edgar-Ludwig Metric | Plain TeX, 7 pages, No figures | Class.Quant.Grav. 18 (2001) 5287-5292 | 10.1088/0264-9381/18/23/321 | null | gr-qc | null | The conformal Killing equations for the most general (non-plane wave)
conformally flat pure radiation field are solved to find the conformal Killing
vectors. As expected fifteen independent conformal Killing vectors exist, but
in general the metric admits no Killing or homothetic vectors. However for
certain special ... | [
{
"created": "Tue, 11 Sep 2001 14:02:12 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Barnes",
"Alan",
""
]
] | The conformal Killing equations for the most general (non-plane wave) conformally flat pure radiation field are solved to find the conformal Killing vectors. As expected fifteen independent conformal Killing vectors exist, but in general the metric admits no Killing or homothetic vectors. However for certain special ca... |
2005.12985 | Mohammad M. Sheikh-Jabbari | K. Hajian, S. Liberati, M.M. Sheikh-Jabbari, M.H. Vahidinia | On Black Hole Temperature in Horndeski Gravity | 9 pages, no figure, v3: Minor changes to match the published version | Phys. Lett. B812 (2020) 136002 | 10.1016/j.physletb.2020.136002 | IPM/P-2020/023 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been observed that for black holes in certain family of Horndeski
gravity theories Wald's entropy formula does not lead to the correct first law
for black hole thermodynamics. For this family of Horndeski theories speeds of
propagation of gravitons and photons are in general different and gravitons
move on an ... | [
{
"created": "Tue, 26 May 2020 19:08:26 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Jun 2020 18:48:13 GMT",
"version": "v2"
},
{
"created": "Sun, 20 Dec 2020 09:40:40 GMT",
"version": "v3"
}
] | 2020-12-22 | [
[
"Hajian",
"K.",
""
],
[
"Liberati",
"S.",
""
],
[
"Sheikh-Jabbari",
"M. M.",
""
],
[
"Vahidinia",
"M. H.",
""
]
] | It has been observed that for black holes in certain family of Horndeski gravity theories Wald's entropy formula does not lead to the correct first law for black hole thermodynamics. For this family of Horndeski theories speeds of propagation of gravitons and photons are in general different and gravitons move on an ef... |
gr-qc/0009076 | Larry Ford | L.H. Ford and Thomas A. Roman | Classical Scalar Fields and the Generalized Second Law | 25 pages, 2 figures; paper substantially rewritten, major changes in
the conclusions | Phys.Rev. D64 (2001) 024023 | 10.1103/PhysRevD.64.024023 | null | gr-qc hep-th | null | It has been shown that classical non-minimally coupled scalar fields can
violate all of the standard energy conditions in general relativity. Violations
of the null and averaged null energy conditions obtainable with such fields
have been suggested as possible exotic matter candidates required for the
maintenance of ... | [
{
"created": "Thu, 21 Sep 2000 18:01:15 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Mar 2001 00:43:10 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Ford",
"L. H.",
""
],
[
"Roman",
"Thomas A.",
""
]
] | It has been shown that classical non-minimally coupled scalar fields can violate all of the standard energy conditions in general relativity. Violations of the null and averaged null energy conditions obtainable with such fields have been suggested as possible exotic matter candidates required for the maintenance of tr... |
1802.02519 | Lisa Glaser | Lisa Glaser | The Ising model coupled to 2d orders | 25 pages, 28 figures | null | 10.1088/1361-6382/aab139 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we make first steps in coupling matter to causal set theory
in the path integral. We explore the case of the Ising model coupled to the 2d
discrete Einstein Hilbert action, restricted to the 2d orders. We probe the
phase diagram in terms of the Wick rotation parameter \b{eta} and the Ising
coupling j ... | [
{
"created": "Wed, 7 Feb 2018 16:53:15 GMT",
"version": "v1"
}
] | 2018-03-28 | [
[
"Glaser",
"Lisa",
""
]
] | In this article we make first steps in coupling matter to causal set theory in the path integral. We explore the case of the Ising model coupled to the 2d discrete Einstein Hilbert action, restricted to the 2d orders. We probe the phase diagram in terms of the Wick rotation parameter \b{eta} and the Ising coupling j an... |
1604.01959 | Sergey Yu. Vernov | A.Yu. Kamenshchik, E.O. Pozdeeva, A. Tronconi, G. Venturi, S.Yu.
Vernov | General solutions of integrable cosmological models with non-minimal
coupling | 6 pages | Phys. Part. Nuclei Lett. 14 (2017) 382 | 10.1134/S1547477117020169 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the integrable model with minimally and non-minimally coupled scalar
fields and the correspondence of their general solutions. Using the model with
a minimally coupled scalar field and a the constant potential as an example we
demonstrate the difference between the general solutions of the corresponding
mode... | [
{
"created": "Thu, 7 Apr 2016 11:27:03 GMT",
"version": "v1"
}
] | 2017-03-24 | [
[
"Kamenshchik",
"A. Yu.",
""
],
[
"Pozdeeva",
"E. O.",
""
],
[
"Tronconi",
"A.",
""
],
[
"Venturi",
"G.",
""
],
[
"Vernov",
"S. Yu.",
""
]
] | We study the integrable model with minimally and non-minimally coupled scalar fields and the correspondence of their general solutions. Using the model with a minimally coupled scalar field and a the constant potential as an example we demonstrate the difference between the general solutions of the corresponding models... |
1401.4093 | Gerard Clement | Gerard Clement and Alessandro Fabbri | Comment on `Critical scalar field collapse in AdS$_3$: an analytical
approach' | 5 pages, reference added, version to be published in Classical and
Quantum Gravity | Class. Quantum Grav. 31 (2014) 098001 | 10.1088/0264-9381/31/9/098001 | LAPTH-002/14 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We comment on the derivation of an analytical solution presented in
arXiv:1309.1629, show that it belongs to a family of separable solutions
previously constructed in arXiv:gr-qc/0109002, and question its relevance to
critical collapse.
| [
{
"created": "Thu, 16 Jan 2014 17:09:59 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Mar 2014 09:05:39 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Apr 2014 11:01:46 GMT",
"version": "v3"
}
] | 2015-06-18 | [
[
"Clement",
"Gerard",
""
],
[
"Fabbri",
"Alessandro",
""
]
] | We comment on the derivation of an analytical solution presented in arXiv:1309.1629, show that it belongs to a family of separable solutions previously constructed in arXiv:gr-qc/0109002, and question its relevance to critical collapse. |
1409.8454 | Matthew J. Lake Dr | Tiberiu Harko and Matthew J. Lake | Cosmic strings in $f\left(R,L_m\right)$ gravity | 20 pages, no figures. Published version | Eur. Phys. J. C 75, no. 2, 60 (2015) | 10.1140/epjc/s10052-015-3287-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider Kasner-type static, cylindrically symmetric interior string
solutions in the $f\left(R,L_m\right)$ theory of modified gravity. The physical
properties of the string are described by an anisotropic energy-momentum tensor
satisfying the condition $T_t^t=T_z^z$; that is, the energy density of the
string alon... | [
{
"created": "Tue, 30 Sep 2014 09:48:50 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Oct 2014 12:07:21 GMT",
"version": "v2"
},
{
"created": "Sat, 17 Jan 2015 11:45:47 GMT",
"version": "v3"
},
{
"created": "Sun, 27 Sep 2015 12:07:01 GMT",
"version": "v4"
}
] | 2015-10-07 | [
[
"Harko",
"Tiberiu",
""
],
[
"Lake",
"Matthew J.",
""
]
] | We consider Kasner-type static, cylindrically symmetric interior string solutions in the $f\left(R,L_m\right)$ theory of modified gravity. The physical properties of the string are described by an anisotropic energy-momentum tensor satisfying the condition $T_t^t=T_z^z$; that is, the energy density of the string along ... |
2310.06592 | David Venhoek | Wim Beenakker, David Venhoek | Accelerating decay with acceleration | null | null | null | null | gr-qc hep-ph hep-th quant-ph | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We investigate accelerated Unruh-deWitt detectors as a model for particle
decay. We find non-trivial decay rates, including a pattern of peaks in decay
rate that extends to lower accelerations. Applying our model to the alpha decay
of $\mathrm{^{210}Po}$, we find that effects could be observed with an
acceleration of... | [
{
"created": "Tue, 10 Oct 2023 12:58:36 GMT",
"version": "v1"
}
] | 2023-10-11 | [
[
"Beenakker",
"Wim",
""
],
[
"Venhoek",
"David",
""
]
] | We investigate accelerated Unruh-deWitt detectors as a model for particle decay. We find non-trivial decay rates, including a pattern of peaks in decay rate that extends to lower accelerations. Applying our model to the alpha decay of $\mathrm{^{210}Po}$, we find that effects could be observed with an acceleration of $... |
1307.6652 | Alberto Garcia-Diaz | Alberto A. Garcia-Diaz | Three dimensional stationary cyclic symmetric Einstein-Maxwell
solutions; energy, mass, momentum, and algebraic tensors characteristics | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main purpose of this contribution is to determine physical and
geometrical characterizations of whole classes of stationary cyclic symmetric
gravitational fields coupled to Maxwell electromagnetic fields within the
$(2+1)$-dimensional gravity. The physical characterization is based on the
determination of the loc... | [
{
"created": "Thu, 25 Jul 2013 07:57:31 GMT",
"version": "v1"
}
] | 2013-07-26 | [
[
"Garcia-Diaz",
"Alberto A.",
""
]
] | The main purpose of this contribution is to determine physical and geometrical characterizations of whole classes of stationary cyclic symmetric gravitational fields coupled to Maxwell electromagnetic fields within the $(2+1)$-dimensional gravity. The physical characterization is based on the determination of the local... |
2305.07329 | Piotr T. Chru\'sciel | Piotr T. Chru\'sciel | Remarks on stationary vacuum black holes | null | null | null | Preprint UWThPh-2023-18 | gr-qc math.DG | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We finish the proof of the no-hair theorem for stationary, analytic,
connected, suitably regular, four dimensional vacuum black holes. We show how
to define the surface gravity and the angular velocity of horizons without
assuming analyticity. We point out that, under the usual regularity conditions,
vacuum near-hori... | [
{
"created": "Fri, 12 May 2023 09:14:03 GMT",
"version": "v1"
}
] | 2023-05-15 | [
[
"Chruściel",
"Piotr T.",
""
]
] | We finish the proof of the no-hair theorem for stationary, analytic, connected, suitably regular, four dimensional vacuum black holes. We show how to define the surface gravity and the angular velocity of horizons without assuming analyticity. We point out that, under the usual regularity conditions, vacuum near-horizo... |
2404.07075 | Lang Liu | Zu-Cheng Chen and Lang Liu | Constraints on Inflation with Null Energy Condition Violation from
Advanced LIGO and Advanced Virgo's First Three Observing Runs | 11 pages, 1 figures, title changed as required by the Editor,
accepted by JCAP; | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The null energy condition (NEC) is a cornerstone of general relativity, and
its violation could leave observable imprints in the cosmic gravitational wave
spectrum. Theoretical models suggest that NEC violations during inflation can
amplify the primordial tensor power spectrum, leading to distinct features in
the sto... | [
{
"created": "Wed, 10 Apr 2024 15:05:44 GMT",
"version": "v1"
},
{
"created": "Sun, 19 May 2024 15:39:38 GMT",
"version": "v2"
}
] | 2024-05-21 | [
[
"Chen",
"Zu-Cheng",
""
],
[
"Liu",
"Lang",
""
]
] | The null energy condition (NEC) is a cornerstone of general relativity, and its violation could leave observable imprints in the cosmic gravitational wave spectrum. Theoretical models suggest that NEC violations during inflation can amplify the primordial tensor power spectrum, leading to distinct features in the stoch... |
gr-qc/0112073 | Andrzej Woszczyna | Z. Golda and A.Woszczyna | Anomalous dispersion of density waves in the early universe with
positive cosmological constant | 7 pages | null | null | null | gr-qc | null | Density perturbations in the flat (K=0) Robertson-Walker universe with
radiation ($p=\epsilon/3$) and positive cosmological constant ($\Lambda>0$) are
investigated. The phenomenon of anomalous dispersion of acoustic waves on
$\Lambda$ is discussed.
| [
{
"created": "Thu, 27 Dec 2001 00:50:09 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Golda",
"Z.",
""
],
[
"Woszczyna",
"A.",
""
]
] | Density perturbations in the flat (K=0) Robertson-Walker universe with radiation ($p=\epsilon/3$) and positive cosmological constant ($\Lambda>0$) are investigated. The phenomenon of anomalous dispersion of acoustic waves on $\Lambda$ is discussed. |
2305.15105 | Giorgio Di Russo | Massimo Bianchi, Giorgio Di Russo, Alfredo Grillo, Jose Francisco
Morales, Giuseppe Sudano | On the stability and deformability of top stars | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Topological stars, or top stars for brevity, are smooth horizonless static
solutions of Einstein-Maxwell theory in 5-d that reduce to spherically
symmetric solutions of Einstein-Maxwell-Dilaton theory in 4-d. We study linear
scalar perturbations of top stars and argue for their stability and
deformability. We tackle ... | [
{
"created": "Wed, 24 May 2023 12:48:14 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Sep 2023 10:12:22 GMT",
"version": "v2"
}
] | 2023-09-04 | [
[
"Bianchi",
"Massimo",
""
],
[
"Di Russo",
"Giorgio",
""
],
[
"Grillo",
"Alfredo",
""
],
[
"Morales",
"Jose Francisco",
""
],
[
"Sudano",
"Giuseppe",
""
]
] | Topological stars, or top stars for brevity, are smooth horizonless static solutions of Einstein-Maxwell theory in 5-d that reduce to spherically symmetric solutions of Einstein-Maxwell-Dilaton theory in 4-d. We study linear scalar perturbations of top stars and argue for their stability and deformability. We tackle th... |
0801.2641 | Kiyoshi Shiraishi | Teruki Hanada, Kazuhiko Shinoda and Kiyoshi Shiraishi (Yamaguchi
University) | Multi-graviton theory in vierbein formalism | 4 pages, no figure. A presentation given at JGRG17 (Nagoya, Japan),
to appear in the proceedings | null | null | null | gr-qc hep-th | null | Recently, multi-graviton theory on a simple closed circuit graph
corresponding to the $S^1$ compactification of the Kaluza-Klein (KK) theory has
been considered. In the present paper, we extend this theory to that on a
general graph and study what modes of particles are included. Furthermore, we
generalize it in a po... | [
{
"created": "Thu, 17 Jan 2008 10:30:22 GMT",
"version": "v1"
}
] | 2008-01-18 | [
[
"Hanada",
"Teruki",
"",
"Yamaguchi\n University"
],
[
"Shinoda",
"Kazuhiko",
"",
"Yamaguchi\n University"
],
[
"Shiraishi",
"Kiyoshi",
"",
"Yamaguchi\n University"
]
] | Recently, multi-graviton theory on a simple closed circuit graph corresponding to the $S^1$ compactification of the Kaluza-Klein (KK) theory has been considered. In the present paper, we extend this theory to that on a general graph and study what modes of particles are included. Furthermore, we generalize it in a poss... |
gr-qc/9908075 | Israel Quiroz | Israel Quiros, Rolando Bonal and Rolando Cardenas (Dpto.Fisica.
Universidad Central de Las Villas. Santa Clara. Cuba.) | Brans-Dicke-type theories and avoidance of the cosmological singularity | 9 pages, LaTeX, no figures. Improved version accepted for publication
in PRD | Phys.Rev. D62 (2000) 044042 | 10.1103/PhysRevD.62.044042 | null | gr-qc hep-th | null | We tudy flat Friedmann-Robertson-Walker cosmology in Brans-Dicke-type
theories of gravitation with minimal coupling between the scalar field and the
matter fields in the Einstein frame (general relativity with an extra scalar
field) for arbitrary values of the Brans-Dicke parameter $\omega>-{3/2}$. It is
shown that t... | [
{
"created": "Mon, 30 Aug 1999 22:24:06 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Dec 1999 15:02:23 GMT",
"version": "v2"
},
{
"created": "Mon, 21 Feb 2000 12:57:26 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Quiros",
"Israel",
"",
"Dpto.Fisica.\n Universidad Central de Las Villas. Santa Clara. Cuba."
],
[
"Bonal",
"Rolando",
"",
"Dpto.Fisica.\n Universidad Central de Las Villas. Santa Clara. Cuba."
],
[
"Cardenas",
"Rolando",
"",
"Dpto.Fisica.\n Universidad ... | We tudy flat Friedmann-Robertson-Walker cosmology in Brans-Dicke-type theories of gravitation with minimal coupling between the scalar field and the matter fields in the Einstein frame (general relativity with an extra scalar field) for arbitrary values of the Brans-Dicke parameter $\omega>-{3/2}$. It is shown that the... |
0810.5686 | Florian Kuhnel | Florian Kuhnel, Dominik J. Schwarz | Stochastic Inflation and Replica Field Theory | 15 pages, 14 figures | Phys.Rev.D79:044009,2009 | 10.1103/PhysRevD.79.044009 | BI-TP 2008/33 | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We adopt methods from statistical field theory to stochastic inflation. For
the example of a free test field in de Sitter and power-law inflation, the
power spectrum of long-wavelength fluctuations is computed. We study its
dependence on the shape of the filter that separates long from short wavelength
modes. While f... | [
{
"created": "Fri, 31 Oct 2008 13:41:05 GMT",
"version": "v1"
}
] | 2011-02-01 | [
[
"Kuhnel",
"Florian",
""
],
[
"Schwarz",
"Dominik J.",
""
]
] | We adopt methods from statistical field theory to stochastic inflation. For the example of a free test field in de Sitter and power-law inflation, the power spectrum of long-wavelength fluctuations is computed. We study its dependence on the shape of the filter that separates long from short wavelength modes. While for... |
0910.0023 | Mariusz Dabrowski P. | Mariusz P. Dabrowski and Tomasz Denkiewicz | Exotic-singularity-driven dark energy | 10 pages, 9 figures, contribution to "Invisible Universe", paris
29.06-3.07.09, to appear in AIP Conference Proceedings | AIP Conf.Proc.1241:561-570,2010 | 10.1063/1.3462686 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss various types of exotic (non-standard) singularities in the
Universe: a Big-Rip (BR or type I), a Sudden Future Singularity (SFS or type
II), a Generalized Sudden Future Singularity, a Finite Scale Factor singularity
(FSF or type III), a Big-Separation (BS or type IV) and a $w$-singularity. They
are charac... | [
{
"created": "Wed, 30 Sep 2009 20:27:01 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Dabrowski",
"Mariusz P.",
""
],
[
"Denkiewicz",
"Tomasz",
""
]
] | We discuss various types of exotic (non-standard) singularities in the Universe: a Big-Rip (BR or type I), a Sudden Future Singularity (SFS or type II), a Generalized Sudden Future Singularity, a Finite Scale Factor singularity (FSF or type III), a Big-Separation (BS or type IV) and a $w$-singularity. They are characte... |
0908.0215 | Luca Lusanna | David Alba and Luca Lusanna | Charged Particles and the Electro-Magnetic Field in Non-Inertial Frames
of Minkowski Spacetime: II. Applications: Rotating Frames, Sagnac Effect,
Faraday Rotation, Wrap-up Effect | This paper and the second one are an adaptation of arXiv 0812.3057
for publication on Int.J.Geom. Methods in Modern Phys. 36p | Int.J.Geom.Methods Mod.Phys.07 2010:185-213,2010 | 10.1142/S0219887810004051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the theory of non-inertial frames in Minkowski space-time, developed
in the previous paper, to various relevant physical systems. We give the 3+1
description without coordinate-singularities of the rotating disk and the
Sagnac effect, with added comments on pulsar magnetosphere and on a
relativistic extensio... | [
{
"created": "Mon, 3 Aug 2009 09:44:44 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Alba",
"David",
""
],
[
"Lusanna",
"Luca",
""
]
] | We apply the theory of non-inertial frames in Minkowski space-time, developed in the previous paper, to various relevant physical systems. We give the 3+1 description without coordinate-singularities of the rotating disk and the Sagnac effect, with added comments on pulsar magnetosphere and on a relativistic extension ... |
2003.10859 | Yasutaka Koga | Yasutaka Koga | Photon surfaces as pure tension shells: Uniqueness of thin shell
wormholes | 22 pages, 3 figures | Phys. Rev. D 101, 104022 (2020) | 10.1103/PhysRevD.101.104022 | RUP-20-10 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Thin shell wormholes are constructed by joining two asymptotically flat
spacetimes along their inner boundaries. The junction conditions imposed on the
spacetimes specify the equation of state of the matter called thin shell
distributed along the joined boundaries. Barcelo and Visser (2000) reported
that spherically ... | [
{
"created": "Tue, 24 Mar 2020 14:07:19 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Jun 2020 10:23:26 GMT",
"version": "v2"
}
] | 2020-06-29 | [
[
"Koga",
"Yasutaka",
""
]
] | Thin shell wormholes are constructed by joining two asymptotically flat spacetimes along their inner boundaries. The junction conditions imposed on the spacetimes specify the equation of state of the matter called thin shell distributed along the joined boundaries. Barcelo and Visser (2000) reported that spherically sy... |
gr-qc/0107060 | B. V. Ivanov | B.V.Ivanov | Integrable cases of gravitating static isothermal fluid spheres | 13 pages, revtex | J.Math.Phys. 43 (2002) 1029 | 10.1063/1.1431259 | null | gr-qc | null | It is shown that different approaches towards the solution of the Einstein
equations for a static spherically symmetric perfect fluid with a gamma-law
equation of state lead to an Abel differential equation of the second kind. Its
only integrable cases at present are flat spacetime, de Sitter solution and its
Buchdah... | [
{
"created": "Tue, 17 Jul 2001 09:53:47 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Ivanov",
"B. V.",
""
]
] | It is shown that different approaches towards the solution of the Einstein equations for a static spherically symmetric perfect fluid with a gamma-law equation of state lead to an Abel differential equation of the second kind. Its only integrable cases at present are flat spacetime, de Sitter solution and its Buchdahl ... |
1203.0691 | John Klauder | John R. Klauder | Recent Results Regarding Affine Quantum Gravity | 32 pages, new features in this alternative approach to quantize
gravity, minor typos plus an improved argument in Sec. 9 suggested by Karel
Kuchar | null | 10.1063/1.4739555 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent progress in the quantization of nonrenormalizable scalar fields has
found that a suitable non-classical modification of the ground state wave
function leads to a result that eliminates term-by-term divergences that arise
in a conventional perturbation analysis. After a brief review of both the
scalar field sto... | [
{
"created": "Sat, 3 Mar 2012 22:16:22 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jul 2012 14:12:02 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Klauder",
"John R.",
""
]
] | Recent progress in the quantization of nonrenormalizable scalar fields has found that a suitable non-classical modification of the ground state wave function leads to a result that eliminates term-by-term divergences that arise in a conventional perturbation analysis. After a brief review of both the scalar field story... |
1302.4486 | Rafael Porto | Chad R. Galley and Rafael A. Porto | Gravitational self-force in the ultra-relativistic limit: The 'large-N'
expansion | 12+23 pages, 24 figures. Paper substantially extended with more
details on the formalism and computations. Submitted to JHEP | null | 10.1007/JHEP11(2013)096 | null | gr-qc astro-ph.CO astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the gravitational self-force using the effective field theory
formalism. We show that in the ultra-relativistic limit \gamma \to \infty, with
\gamma the boost factor, many simplifications arise. Drawing parallels with the
large N limit in quantum field theory, we introduce the parameter 1/N =
1/\gamma^2 and ... | [
{
"created": "Mon, 18 Feb 2013 23:55:28 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Sep 2013 10:45:25 GMT",
"version": "v2"
}
] | 2015-06-15 | [
[
"Galley",
"Chad R.",
""
],
[
"Porto",
"Rafael A.",
""
]
] | We study the gravitational self-force using the effective field theory formalism. We show that in the ultra-relativistic limit \gamma \to \infty, with \gamma the boost factor, many simplifications arise. Drawing parallels with the large N limit in quantum field theory, we introduce the parameter 1/N = 1/\gamma^2 and sh... |
gr-qc/0406028 | Andrzej Okolow | Andrzej Okolow | Hilbert space built over connections with a non-compact structure group | 45 pages, no figures, LaTeX2e, the discussion of results extended | Class.Quant.Grav. 22 (2005) 1329-1360 | 10.1088/0264-9381/22/7/009 | null | gr-qc | null | Quantization of general relativity in terms of SL(2,C)-connections (i.e. in
terms of the complex Ashtekar variables) is technically difficult because of
the non-compactness of SL(2,C). The difficulties concern the construction of a
diffeomorphism invariant Hilbert space structure on the space of cylindrical
functions... | [
{
"created": "Tue, 8 Jun 2004 11:36:55 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Mar 2005 00:04:10 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Okolow",
"Andrzej",
""
]
] | Quantization of general relativity in terms of SL(2,C)-connections (i.e. in terms of the complex Ashtekar variables) is technically difficult because of the non-compactness of SL(2,C). The difficulties concern the construction of a diffeomorphism invariant Hilbert space structure on the space of cylindrical functions o... |
1311.4358 | Christodoulakis Theodosios | N. Dimakis, T. Christodoulakis, Petros A. Terzis | FLRW metric $f(R)$ cosmology with a perfect fluid by generating
integrals of motion | LaTex2e source file, 24 pages, no figures | null | 10.1016/j.geomphys.2013.12.001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of metric f(R) gravity, we consider a FLRW space-time, filled
with a perfect fluid described by a barotropic equation of state (p = \gamma
\rho). We give the equivalent mini-superspace description and use the
reparametrization invariance of the resulting Lagrangian to work in the
equivalent constant po... | [
{
"created": "Mon, 18 Nov 2013 12:53:04 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Dimakis",
"N.",
""
],
[
"Christodoulakis",
"T.",
""
],
[
"Terzis",
"Petros A.",
""
]
] | In the context of metric f(R) gravity, we consider a FLRW space-time, filled with a perfect fluid described by a barotropic equation of state (p = \gamma \rho). We give the equivalent mini-superspace description and use the reparametrization invariance of the resulting Lagrangian to work in the equivalent constant pote... |
gr-qc/0406122 | Joan Josep Ferrando | Bartolom\'e Coll and Joan Josep Ferrando | Local thermal equilibrium and ideal gas Stephani universes | 20 pages | Gen.Rel.Grav. 37 (2005) 557-573 | 10.1007/s10714-005-0042-y | null | gr-qc | null | The Stephani universes that can be interpreted as an ideal gas evolving in
local thermal equilibrium are determined. Five classes of thermodynamic schemes
are admissible, which give rise to five classes of regular models and three
classes of singular models. No Stephani universes exist representing an exact
solution ... | [
{
"created": "Wed, 30 Jun 2004 14:18:42 GMT",
"version": "v1"
}
] | 2016-08-16 | [
[
"Coll",
"Bartolomé",
""
],
[
"Ferrando",
"Joan Josep",
""
]
] | The Stephani universes that can be interpreted as an ideal gas evolving in local thermal equilibrium are determined. Five classes of thermodynamic schemes are admissible, which give rise to five classes of regular models and three classes of singular models. No Stephani universes exist representing an exact solution to... |
0804.2082 | Juan Manuel Garcia-Islas | J.Manuel Garcia-Islas | BTZ Black Hole Entropy: A spin foam model description | 10 pages, 2 figures, Final Version | Class.Quant.Grav.25:245001,2008 | 10.1088/0264-9381/25/24/245001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a microscopical explanation of the entropy of the BTZ black hole
using discrete spin foam models of quantum gravity. The entropy of a black hole
is given in geometrical terms which lead us to think that its statistical
description must be given in terms of a quantum geometry. In this paper we
present it in... | [
{
"created": "Sun, 13 Apr 2008 19:24:53 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Dec 2008 06:51:44 GMT",
"version": "v2"
}
] | 2008-12-18 | [
[
"Garcia-Islas",
"J. Manuel",
""
]
] | We present a microscopical explanation of the entropy of the BTZ black hole using discrete spin foam models of quantum gravity. The entropy of a black hole is given in geometrical terms which lead us to think that its statistical description must be given in terms of a quantum geometry. In this paper we present it in t... |
0912.0542 | Genly Le\'on | Genly Leon, Yoelsy Leyva, Emmanuel N. Saridakis, Osmel Martin and
Rolando Cardenas | Falsifying Field-based Dark Energy Models | 64 pages, 12 figures, invited review for Nova Science Publishers, as
a chapter of the book Dark Energy: Theories, Developments and Implications | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We survey the application of specific tools to distinguish amongst the wide
variety of dark energy models that are nowadays under investigation. The first
class of tools is more mathematical in character: the application of the theory
of dynamical systems to select the better behaved models, with appropriate
attracto... | [
{
"created": "Wed, 2 Dec 2009 22:16:25 GMT",
"version": "v1"
}
] | 2009-12-05 | [
[
"Leon",
"Genly",
""
],
[
"Leyva",
"Yoelsy",
""
],
[
"Saridakis",
"Emmanuel N.",
""
],
[
"Martin",
"Osmel",
""
],
[
"Cardenas",
"Rolando",
""
]
] | We survey the application of specific tools to distinguish amongst the wide variety of dark energy models that are nowadays under investigation. The first class of tools is more mathematical in character: the application of the theory of dynamical systems to select the better behaved models, with appropriate attractors... |
1006.2755 | Sergey Kozyrev | S.M. Kozyrev | Curious interior solutions of general relativity | 6 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we provide a discussion on a composite class of exact static
spherically symmetric vacuum solutions of Einstein's equations. We construct
the composite solution of Einstein field equation by match the interior vacuum
metric in Schwarzschild original gauge, to the exterior vacuum metric in
isotropic g... | [
{
"created": "Mon, 14 Jun 2010 16:28:22 GMT",
"version": "v1"
}
] | 2010-06-15 | [
[
"Kozyrev",
"S. M.",
""
]
] | In this article, we provide a discussion on a composite class of exact static spherically symmetric vacuum solutions of Einstein's equations. We construct the composite solution of Einstein field equation by match the interior vacuum metric in Schwarzschild original gauge, to the exterior vacuum metric in isotropic gau... |
gr-qc/0303001 | Theodore A. Jacobson | T. Jacobson, S. Liberati, and D. Mattingly | Comments on ``Improved limit on quantum-spacetime modifications of
Lorentz symmetry from observations of gamma-ray blazars" | 4 pages | null | null | null | gr-qc astro-ph hep-ph hep-th | null | We address several criticisms by Amelino-Camelia of our recent analyses of
two observational constraints on Lorentz violation at order E/M_{Planck}. In
particular, we emphasize the role of effective field theory in our analysis of
synchrotron radiation, and we strengthen the justification for the constraint
coming fr... | [
{
"created": "Sat, 1 Mar 2003 05:07:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Jacobson",
"T.",
""
],
[
"Liberati",
"S.",
""
],
[
"Mattingly",
"D.",
""
]
] | We address several criticisms by Amelino-Camelia of our recent analyses of two observational constraints on Lorentz violation at order E/M_{Planck}. In particular, we emphasize the role of effective field theory in our analysis of synchrotron radiation, and we strengthen the justification for the constraint coming from... |
2206.02193 | Truong Xuan Pham | Truong Xuan Pham | Peeling for tensorial wave equations on Schwarzschild spacetime | 22 pages, Reviews in Mathematical Physics, 2023. arXiv admin note:
text overlap with arXiv:2006.02888 | Reviews in Mathematical Physics, 2023 | 10.1142/S0129055X2350023X | null | gr-qc math-ph math.AP math.DG math.MP | http://creativecommons.org/licenses/by/4.0/ | In this paper, we establish the asymptotic behaviour along outgoing and
incoming radial geodesics, i.e., the peeling property for the tensorial
Fackrell-Ipser and spin $\pm 1$ Teukolsky equations on Schwarzschild spacetime.
Our method combines a conformal compactification with vector field techniques
to prove the two... | [
{
"created": "Sun, 5 Jun 2022 14:39:36 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Jun 2022 07:59:03 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Jun 2023 09:54:09 GMT",
"version": "v3"
},
{
"created": "Tue, 26 Sep 2023 00:37:13 GMT",
"version": "v4"
}
] | 2023-09-28 | [
[
"Pham",
"Truong Xuan",
""
]
] | In this paper, we establish the asymptotic behaviour along outgoing and incoming radial geodesics, i.e., the peeling property for the tensorial Fackrell-Ipser and spin $\pm 1$ Teukolsky equations on Schwarzschild spacetime. Our method combines a conformal compactification with vector field techniques to prove the two-s... |
1406.0417 | Sumanta Chakraborty | Sumanta Chakraborty | Equilibrium configuration of perfect fluid orbiting around black holes
in some classes of alternative gravity theories | 29 pages; 4 figures; Thoroughly Revised; Matches Published Version | Class. Quantum Grav. 32 075007 (2015) | 10.1088/0264-9381/32/7/075007 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The hydrodynamic behaviour of perfect fluid orbiting around black holes in
spherically symmetric spacetime for various alternative gravity theories has
been investigated. For this purpose we have assumed an uniform distribution for
the angular momentum density of the rotating perfect fluid. The contours of
equipotent... | [
{
"created": "Fri, 9 May 2014 11:28:24 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Mar 2015 11:17:23 GMT",
"version": "v2"
}
] | 2015-03-11 | [
[
"Chakraborty",
"Sumanta",
""
]
] | The hydrodynamic behaviour of perfect fluid orbiting around black holes in spherically symmetric spacetime for various alternative gravity theories has been investigated. For this purpose we have assumed an uniform distribution for the angular momentum density of the rotating perfect fluid. The contours of equipotentia... |
2208.07695 | Elena Kopteva | Stupka A.A., Kopteva E.M., Saliuk M.A., Bormotova I.M | Virial theorem for a cloud of stars obtained from Jeans equations with
the second correlation moments | null | null | 10.1140/epjc/s10052-023-11737-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A hydrodynamic model for small acoustic oscillations in a cloud of stars is
built, taking into account the self-consistent gravitational field in
equilibrium with a non-zero second correlation moment. It is assumed that the
momentum flux density tensor should include the analog of the anisotropic
pressure tensor and ... | [
{
"created": "Tue, 16 Aug 2022 12:05:53 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Feb 2023 15:12:11 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Jun 2023 14:19:33 GMT",
"version": "v3"
}
] | 2023-07-26 | [
[
"A.",
"Stupka A.",
""
],
[
"M.",
"Kopteva E.",
""
],
[
"A.",
"Saliuk M.",
""
],
[
"M",
"Bormotova I.",
""
]
] | A hydrodynamic model for small acoustic oscillations in a cloud of stars is built, taking into account the self-consistent gravitational field in equilibrium with a non-zero second correlation moment. It is assumed that the momentum flux density tensor should include the analog of the anisotropic pressure tensor and th... |
1602.04188 | Mikhail M. Ivanov | Diego Blas, Mikhail M. Ivanov, Ignacy Sawicki and Sergey Sibiryakov | On constraining the speed of gravitational waves following GW150914 | 3 pages, 1 figure, references added | Pisma Zh.Eksp.Teor.Fiz. 103 (2016) no.10, 708-710; JETP Lett. 103
(2016) no.10, 624-626 | 10.7868/S0370274X16100039, 10.1134/S0021364016100040 | CERN-TH-2016-034, INR-TH-2016-005 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We point out that the observed time delay between the detection of the signal
at the Hanford and Livingston LIGO sites from the gravitational wave event
GW150914 places an upper bound on the speed of propagation of gravitational
waves, $c_{gw}\lesssim 1.7$ in the units of speed of light. Combined with the
lower bound... | [
{
"created": "Fri, 12 Feb 2016 19:58:31 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Mar 2016 08:35:39 GMT",
"version": "v2"
}
] | 2016-08-09 | [
[
"Blas",
"Diego",
""
],
[
"Ivanov",
"Mikhail M.",
""
],
[
"Sawicki",
"Ignacy",
""
],
[
"Sibiryakov",
"Sergey",
""
]
] | We point out that the observed time delay between the detection of the signal at the Hanford and Livingston LIGO sites from the gravitational wave event GW150914 places an upper bound on the speed of propagation of gravitational waves, $c_{gw}\lesssim 1.7$ in the units of speed of light. Combined with the lower bound f... |
2306.09052 | Yizhou Lu | Sebastian Garcia-Saenz, Yizhou Lu, Zhiming Shuai | Scalar-Induced Gravitational Waves from Ghost Inflation and Parity
Violation | 36pages | Phys.Rev. D108 (2023) no.12, 123507 | 10.1103/PhysRevD.108.123507 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the scalar-induced gravitational wave energy density in the
theory of Ghost Inflation, assuming scale invariance and taking into account
both the power spectrum- and trispectrum-induced contributions. For the latter
we consider the leading cubic and quartic couplings of the comoving curvature
perturbatio... | [
{
"created": "Thu, 15 Jun 2023 11:22:00 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Nov 2023 04:46:05 GMT",
"version": "v2"
}
] | 2023-12-06 | [
[
"Garcia-Saenz",
"Sebastian",
""
],
[
"Lu",
"Yizhou",
""
],
[
"Shuai",
"Zhiming",
""
]
] | We calculate the scalar-induced gravitational wave energy density in the theory of Ghost Inflation, assuming scale invariance and taking into account both the power spectrum- and trispectrum-induced contributions. For the latter we consider the leading cubic and quartic couplings of the comoving curvature perturbation ... |
1609.04488 | Shahram Jalalzadeh | M. Fathi, S. Jalalzadeh and P.V. Moniz | Classical Universe emerging from quantum cosmology without horizon and
flatness problems | 21 pages, 1 figure, to appear in European Physical Journal C | null | 10.1140/epjc/s10052-016-4373-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the complex de Broglie-Bohm formulation of quantum mechanics [1] to
a spatially closed homogeneous and isotropic early Universe whose matter
content are radiation and dust perfect fluids. We then show that an expanding
classical Universe can emerge from an oscillating (with complex scale factor)
quantum Univ... | [
{
"created": "Thu, 15 Sep 2016 01:35:11 GMT",
"version": "v1"
}
] | 2016-10-12 | [
[
"Fathi",
"M.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Moniz",
"P. V.",
""
]
] | We apply the complex de Broglie-Bohm formulation of quantum mechanics [1] to a spatially closed homogeneous and isotropic early Universe whose matter content are radiation and dust perfect fluids. We then show that an expanding classical Universe can emerge from an oscillating (with complex scale factor) quantum Univer... |
1206.2055 | Lee Hodgkinson | Lee Hodgkinson and Jorma Louko | Static, stationary and inertial Unruh-DeWitt detectors on the BTZ black
hole | 31 pages, 28 figures. v3: minor corrections and clarifications | Phys. Rev. D 86, 064031 (2012) | 10.1103/PhysRevD.86.064031 | NSF-KITP-12-121 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine an Unruh-DeWitt particle detector coupled to a scalar field in
three-dimensional curved spacetime. We first obtain a regulator-free expression
for the transition probability in an arbitrary Hadamard state, working within
first-order perturbation theory and assuming smooth switching, and we show that
both t... | [
{
"created": "Sun, 10 Jun 2012 20:31:45 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jun 2012 16:58:36 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Oct 2012 09:06:24 GMT",
"version": "v3"
}
] | 2012-10-09 | [
[
"Hodgkinson",
"Lee",
""
],
[
"Louko",
"Jorma",
""
]
] | We examine an Unruh-DeWitt particle detector coupled to a scalar field in three-dimensional curved spacetime. We first obtain a regulator-free expression for the transition probability in an arbitrary Hadamard state, working within first-order perturbation theory and assuming smooth switching, and we show that both the... |
2206.05993 | Jose M. Isidro | P. Fernandez de Cordoba, R. Gallego Torrome, S. Gavasso and J.M.
Isidro | On the cosmological constant of flat FLRW spacetime | 12 pages, refs. added, discussion expanded | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We consider an exponentially expanding, flat,
Friedmann-Lemaitre-Robertson-Walker (FLRW) Universe filled with a free
Schroedinger field. The probability fluid of the latter is used to mimic the
cosmological fluid (baryonic plus dark matter), thus providing the matter
density and pressure terms in the corresponding Fr... | [
{
"created": "Mon, 13 Jun 2022 09:29:05 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Sep 2022 08:32:26 GMT",
"version": "v2"
}
] | 2022-09-13 | [
[
"de Cordoba",
"P. Fernandez",
""
],
[
"Torrome",
"R. Gallego",
""
],
[
"Gavasso",
"S.",
""
],
[
"Isidro",
"J. M.",
""
]
] | We consider an exponentially expanding, flat, Friedmann-Lemaitre-Robertson-Walker (FLRW) Universe filled with a free Schroedinger field. The probability fluid of the latter is used to mimic the cosmological fluid (baryonic plus dark matter), thus providing the matter density and pressure terms in the corresponding Frie... |
2304.06546 | Omar Mustafa | Omar Mustafa | Fine tuning of rainbow gravity functions and Klein-Gordon particles in
cosmic string rainbow gravity spacetime | 15 pages, 7 figures. arXiv admin note: substantial text overlap with
arXiv:2301.05464, arXiv:2301.12370 | null | null | null | gr-qc astro-ph.HE hep-ph | http://creativecommons.org/licenses/by/4.0/ | We argue that, as long as relativistic quantum particles are in point, the
variable $y=E/E_p$ of the rainbow functions pair $g_{_{0}} (y)$ and $g_{_{1}}
(y)$ should be fine tuned into $y=|E|/E_p$, where $E_p$ is the Planck's energy
scale. Otherwise, the rainbow functions will be only successful to describe the
rainbo... | [
{
"created": "Thu, 13 Apr 2023 13:56:45 GMT",
"version": "v1"
}
] | 2023-04-14 | [
[
"Mustafa",
"Omar",
""
]
] | We argue that, as long as relativistic quantum particles are in point, the variable $y=E/E_p$ of the rainbow functions pair $g_{_{0}} (y)$ and $g_{_{1}} (y)$ should be fine tuned into $y=|E|/E_p$, where $E_p$ is the Planck's energy scale. Otherwise, the rainbow functions will be only successful to describe the rainbow ... |
1905.04111 | Sujoy Modak | Sujoy K. Modak | Cosmological Particle Creation Beyond de Sitter | Invited Review Article to IJMPD (published); 33 pages, 7 figures;
Based on author's previous articles arXiv:1308.4976, arXiv:1802.03833 and
arXiv:1806.00972 | International Journal of Modern Physics D Vol. 28 (2019) 1930015 | 10.1142/S0218271819300155 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Over the years, de Sitter spacetime has been a central focus, in studies
involving quantum fields, for its importance in the early and late expansion
stages of the universe. While de Sitter spacetime closely mimics
characteristics of the inflationary and dark energy dominated universe it does
not help to understand t... | [
{
"created": "Wed, 8 May 2019 21:00:25 GMT",
"version": "v1"
},
{
"created": "Fri, 31 May 2019 04:18:52 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Jul 2021 03:05:14 GMT",
"version": "v3"
}
] | 2021-07-12 | [
[
"Modak",
"Sujoy K.",
""
]
] | Over the years, de Sitter spacetime has been a central focus, in studies involving quantum fields, for its importance in the early and late expansion stages of the universe. While de Sitter spacetime closely mimics characteristics of the inflationary and dark energy dominated universe it does not help to understand the... |
gr-qc/0703030 | Antonios Tsokaros A. | Antonios A. Tsokaros, Koji Uryu | Numerical method for binary black hole/neutron star initial data: Code
test | 19 pages, 18 figures | Phys.Rev.D75:044026,2007 | 10.1103/PhysRevD.75.044026 | null | gr-qc | null | A new numerical method to construct binary black hole/neutron star initial
data is presented. The method uses three spherical coordinate patches; Two of
these are centered at the binary compact objects and cover a neighborhood of
each object; the third patch extends to the asymptotic region. As in the
Komatsu-Eriguch... | [
{
"created": "Mon, 5 Mar 2007 22:15:16 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Tsokaros",
"Antonios A.",
""
],
[
"Uryu",
"Koji",
""
]
] | A new numerical method to construct binary black hole/neutron star initial data is presented. The method uses three spherical coordinate patches; Two of these are centered at the binary compact objects and cover a neighborhood of each object; the third patch extends to the asymptotic region. As in the Komatsu-Eriguchi-... |
2105.08556 | Philip D. Mannheim | Philip D. Mannheim | Critique of the use of geodesics in astrophysics and cosmology | 51 pages. In flat space normals to wavefronts are geodesic. We show
that the curved space generalization is to curved space wavefront normals,
and in curved space these normals do not have to be geodesic. This is the
final version, which is to appear in Classical and Quantum Gravity | null | 10.1088/1361-6382/ac8140 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Since particles obey wave equations, in general one is not free to postulate
that particles move on the geodesics associated with test particles. Rather,
for this to be the case one has to be able to derive such behavior starting
from the equations of motion that the particles obey, and to do so one can
employ the ei... | [
{
"created": "Tue, 18 May 2021 14:40:34 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Jun 2021 19:28:34 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Jul 2021 13:10:28 GMT",
"version": "v3"
},
{
"created": "Tue, 20 Jul 2021 20:06:54 GMT",
"version": "v4"
},
{
"cr... | 2022-12-07 | [
[
"Mannheim",
"Philip D.",
""
]
] | Since particles obey wave equations, in general one is not free to postulate that particles move on the geodesics associated with test particles. Rather, for this to be the case one has to be able to derive such behavior starting from the equations of motion that the particles obey, and to do so one can employ the eiko... |
1112.2966 | Laszlo B. Szabados | L\'aszl\'o B. Szabados | Mass, gauge conditions and spectral properties of the Sen-Witten and
3-surface twistor operators in closed universes | 34 pages, final version, appearing in Class. Quantum Grav | null | 10.1088/0264-9381/29/9/095001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A non-negative expression, built from the norm of the 3-surface twistor
operator and the energy-momentum tensor of the matter fields on a spacelike
hypersurface, is found which, in the asymptotically flat/hyperboloidal case,
provides a lower bound for the ADM/Bondi--Sachs mass, while on closed
hypersurfaces it gives ... | [
{
"created": "Tue, 13 Dec 2011 17:15:35 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Apr 2012 14:26:10 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Szabados",
"László B.",
""
]
] | A non-negative expression, built from the norm of the 3-surface twistor operator and the energy-momentum tensor of the matter fields on a spacelike hypersurface, is found which, in the asymptotically flat/hyperboloidal case, provides a lower bound for the ADM/Bondi--Sachs mass, while on closed hypersurfaces it gives th... |
1408.7009 | Joel Saavedra | P. A. Gonzalez, Eleftherios Papantonopoulos, Joel Saavedra, Yerko
Vasquez | Extremal Hairy Black Holes | 17 pages. Match with the journal version accepted by JHEP. arXiv
admin note: substantial text overlap with arXiv:1309.2161 | null | 10.1007/JHEP11(2014)011 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a gravitating system consisting of a scalar field minimally
coupled to gravity with a self-interacting potential and an U(1)
electromagnetic field. Solving the coupled Einstein-Maxwell-scalar system we
find exact hairy charged black hole solutions with the scalar field regular
everywhere. We go to the zer... | [
{
"created": "Fri, 29 Aug 2014 13:07:00 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Sep 2014 15:02:46 GMT",
"version": "v2"
},
{
"created": "Fri, 24 Oct 2014 12:00:39 GMT",
"version": "v3"
}
] | 2015-06-22 | [
[
"Gonzalez",
"P. A.",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Saavedra",
"Joel",
""
],
[
"Vasquez",
"Yerko",
""
]
] | We consider a gravitating system consisting of a scalar field minimally coupled to gravity with a self-interacting potential and an U(1) electromagnetic field. Solving the coupled Einstein-Maxwell-scalar system we find exact hairy charged black hole solutions with the scalar field regular everywhere. We go to the zero ... |
gr-qc/0310016 | Itai Seggev | Itai Seggev | Dynamics in Stationary, Non-Globally Hyperbolic Spacetimes | 18 pages, 1 figure, AMSLaTeX; v2: expanded discussion of field
quantization, new Proposition 3.1, revised Theorem 4.2, corrected typos, and
updated references | Class.Quant.Grav. 21 (2004) 2651-2668 | 10.1088/0264-9381/21/11/010 | null | gr-qc | null | Classically, the dynamics in a non-globally hyperbolic spacetime is ill
posed. Previously, a prescription was given for defining dynamics in static
spacetimes in terms of a second order operator acting on a Hilbert space
defined on static slices. The present work extends this result by giving a
similar prescription f... | [
{
"created": "Thu, 2 Oct 2003 19:56:06 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Nov 2003 20:56:53 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Seggev",
"Itai",
""
]
] | Classically, the dynamics in a non-globally hyperbolic spacetime is ill posed. Previously, a prescription was given for defining dynamics in static spacetimes in terms of a second order operator acting on a Hilbert space defined on static slices. The present work extends this result by giving a similar prescription for... |
2105.06420 | Stephen C. Anco | Stephen C. Anco, Jordan Fazio | Analogue of a Laplace-Runge-Lenz vector for particle orbits (timelike
geodesics) in Schwarzschild spacetime | 42 pages; 15 figures. Major revision and material on LRL vector at
spatial infinity | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In Schwarzschild spacetime, the timelike geodesic equations, which define
particle orbits, have a well-known formulation as a dynamical system in
coordinates adapted to the timelike hypersurface containing the geodesic. For
equatorial geodesics, the resulting dynamical system is shown to possess a
conserved angular q... | [
{
"created": "Thu, 13 May 2021 16:55:26 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Feb 2023 22:26:50 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Aug 2023 21:11:37 GMT",
"version": "v3"
}
] | 2023-08-03 | [
[
"Anco",
"Stephen C.",
""
],
[
"Fazio",
"Jordan",
""
]
] | In Schwarzschild spacetime, the timelike geodesic equations, which define particle orbits, have a well-known formulation as a dynamical system in coordinates adapted to the timelike hypersurface containing the geodesic. For equatorial geodesics, the resulting dynamical system is shown to possess a conserved angular qua... |
gr-qc/9303005 | null | C. Farina, J. Gamboa and A. J. Segui-Santonja | Motion and Trajectories of Particles Around Three-Dimensional Black
Holes | Plain TeX, 9pp, IPNO-TH 93/06, DFTUZ 93/01 | Class.Quant.Grav.10:L193-L200,1993 | 10.1088/0264-9381/10/11/001 | null | gr-qc | null | The motion of relativistic particles around three dimensional black holes
following the Hamilton-Jacobi formalism is studied. It follows that the
Hamilton-Jacobi equation can be separated and reduced to quadratures in analogy
with the four dimensional case. It is shown that: a) particles are trapped by
the black hole... | [
{
"created": "Tue, 2 Mar 1993 14:54:42 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Farina",
"C.",
""
],
[
"Gamboa",
"J.",
""
],
[
"Segui-Santonja",
"A. J.",
""
]
] | The motion of relativistic particles around three dimensional black holes following the Hamilton-Jacobi formalism is studied. It follows that the Hamilton-Jacobi equation can be separated and reduced to quadratures in analogy with the four dimensional case. It is shown that: a) particles are trapped by the black hole i... |
1210.7388 | Wei-Tou Ni | K.G. Arun, Bala R. Iyer and Wei-Tou Ni | Fifth ASTROD Symposium and Outlook of Direct Gravitational-Wave
Detection | 8 pages, 5 figures | Asia Pacific Physics Newsletter Vol. 01, No. 02, pp. 6-11, 2012
(http://www.worldscientific.com/sda/1042/appn-v1n2.pdf) | null | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | From July 11 to July 13, 2012, Raman Research Institute (Bangalore, India)
hosted the Fifth International ASTROD Symposium on Laser Astrodynamics, Space
Test of Relativity and Gravitational-Wave Astronomy. This is a report on the
symposium with an exposition of the outlook of direct gravitational-wave
detection.
| [
{
"created": "Sun, 28 Oct 2012 01:04:43 GMT",
"version": "v1"
}
] | 2012-10-30 | [
[
"Arun",
"K. G.",
""
],
[
"Iyer",
"Bala R.",
""
],
[
"Ni",
"Wei-Tou",
""
]
] | From July 11 to July 13, 2012, Raman Research Institute (Bangalore, India) hosted the Fifth International ASTROD Symposium on Laser Astrodynamics, Space Test of Relativity and Gravitational-Wave Astronomy. This is a report on the symposium with an exposition of the outlook of direct gravitational-wave detection. |
2106.09037 | Sergio Hern\'andez-Cuenca | {\AA}smund Folkestad and Sergio Hern\'andez-Cuenca | Conformal Rigidity from Focusing | 12 pages | Class. Quant. Grav. 38 (2021) 21, 215005 | 10.1088/1361-6382/ac27ef | MIT-CTP/5307 | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The null curvature condition (NCC) is the requirement that the Ricci
curvature of a Lorentzian manifold be nonnegative along null directions, which
ensures the focusing of null geodesic congruences. In this note, we show that
the NCC together with the causal structure significantly constrain the metric.
In particular... | [
{
"created": "Wed, 16 Jun 2021 18:00:02 GMT",
"version": "v1"
}
] | 2021-10-15 | [
[
"Folkestad",
"Åsmund",
""
],
[
"Hernández-Cuenca",
"Sergio",
""
]
] | The null curvature condition (NCC) is the requirement that the Ricci curvature of a Lorentzian manifold be nonnegative along null directions, which ensures the focusing of null geodesic congruences. In this note, we show that the NCC together with the causal structure significantly constrain the metric. In particular, ... |
2402.15323 | Octavian Micu | Octavian Micu | Dynamical stability of bootstrapped Newtonian stars | 17 pages, 3 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the dynamical stability of bootstrapped Newtonian stars
following homologous adiabatic perturbations, focusing on objects of low or
intermediate compactness. The results show that for stars with homogeneous
densities these perturbations induce some oscillatory behaviour regardless of
their compactness,... | [
{
"created": "Fri, 23 Feb 2024 13:42:55 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Aug 2024 09:22:24 GMT",
"version": "v2"
}
] | 2024-08-08 | [
[
"Micu",
"Octavian",
""
]
] | We investigate the dynamical stability of bootstrapped Newtonian stars following homologous adiabatic perturbations, focusing on objects of low or intermediate compactness. The results show that for stars with homogeneous densities these perturbations induce some oscillatory behaviour regardless of their compactness, d... |
1007.4846 | Paulo Laerte Natti | Mario Goto, Paulo Laerte Natti and Erica Regina Takano Natti | On the equivalence principle and gravitational and inertial mass
relation of classical charged particles | null | Class.Quant.Grav.27:025005,2010 | 10.1088/0264-9381/27/2/025005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the locally constant force necessary to get a stable hyperbolic
motion regime for classical charged point particles, actually, is a combination
of an applied external force and of the electromagnetic radiation reaction
force. It implies, as the strong Equivalence Principle is valid, that the
passive grav... | [
{
"created": "Tue, 27 Jul 2010 23:30:11 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Goto",
"Mario",
""
],
[
"Natti",
"Paulo Laerte",
""
],
[
"Natti",
"Erica Regina Takano",
""
]
] | We show that the locally constant force necessary to get a stable hyperbolic motion regime for classical charged point particles, actually, is a combination of an applied external force and of the electromagnetic radiation reaction force. It implies, as the strong Equivalence Principle is valid, that the passive gravit... |
2306.11797 | Shreejit Jadhav | Shreejit Jadhav, Mihir Shrivastava, Sanjit Mitra | Towards a robust and reliable deep learning approach for detection of
compact binary mergers in gravitational wave data | 22 pages, 22 figures | Mach. Learn.: Sci. Technol. 4 045028 (2023) | 10.1088/2632-2153/ad0938 | null | gr-qc astro-ph.HE cs.LG | http://creativecommons.org/licenses/by/4.0/ | The ability of deep learning (DL) approaches to learn generalised signal and
noise models, coupled with their fast inference on GPUs, holds great promise
for enhancing gravitational-wave (GW) searches in terms of speed, parameter
space coverage, and search sensitivity. However, the opaque nature of DL models
severely... | [
{
"created": "Tue, 20 Jun 2023 18:00:05 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Nov 2023 21:17:16 GMT",
"version": "v2"
}
] | 2023-11-15 | [
[
"Jadhav",
"Shreejit",
""
],
[
"Shrivastava",
"Mihir",
""
],
[
"Mitra",
"Sanjit",
""
]
] | The ability of deep learning (DL) approaches to learn generalised signal and noise models, coupled with their fast inference on GPUs, holds great promise for enhancing gravitational-wave (GW) searches in terms of speed, parameter space coverage, and search sensitivity. However, the opaque nature of DL models severely h... |
2311.17639 | Gungwon Kang | Yeong-Bok Bae, Chan Park, Edwin J. Son, Sang-Hyeon Ahn, Minjoong
Jeong, Gungwon Kang, Chunglee Kim, Dong Lak Kim, Jaewan Kim, Whansun Kim,
Hyung Mok Lee, Yong-Ho Lee, Ronald S. Norton, John J. Oh, Sang Hoon Oh, and
Ho Jung Paik | A superconducting tensor detector for mid-frequency gravitational waves:
its multi-channel nature and main astrophysical targets | 35 pages, 8 figures, 4 tables | null | null | null | gr-qc astro-ph.IM hep-ex hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Mid-frequency band gravitational-wave detectors will be complementary for the
existing Earth-based detectors (sensitive above 10 Hz or so) and the future
space-based detectors such as LISA, which will be sensitive below around 10
mHz. A ground-based superconducting omnidirectional gravitational radiation
observatory ... | [
{
"created": "Wed, 29 Nov 2023 13:53:44 GMT",
"version": "v1"
}
] | 2023-11-30 | [
[
"Bae",
"Yeong-Bok",
""
],
[
"Park",
"Chan",
""
],
[
"Son",
"Edwin J.",
""
],
[
"Ahn",
"Sang-Hyeon",
""
],
[
"Jeong",
"Minjoong",
""
],
[
"Kang",
"Gungwon",
""
],
[
"Kim",
"Chunglee",
""
],
[
"Kim",
... | Mid-frequency band gravitational-wave detectors will be complementary for the existing Earth-based detectors (sensitive above 10 Hz or so) and the future space-based detectors such as LISA, which will be sensitive below around 10 mHz. A ground-based superconducting omnidirectional gravitational radiation observatory (S... |
2307.13099 | Jay Tasson | Anarya Ray, Pinchen Fan, Vincent F. He, Malachy Bloom, Suyu Michael
Yang, Jay D. Tasson, and Jolien D. E. Creighton | Measuring Gravitational Wave Speed and Lorentz Violation with the First
Three Gravitational-Wave Catalogs | 17 pages, 4 figures, 3 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The speed of gravitational waves $v_g$ can be measured with the time delay
between gravitational-wave detectors. Our study provides a more precise
measurement of $v_g$ using gravitational-wave signals only, compared with
previous studies. We select 52 gravitational-wave events that were detected
with high confidence ... | [
{
"created": "Mon, 24 Jul 2023 19:41:13 GMT",
"version": "v1"
}
] | 2023-07-26 | [
[
"Ray",
"Anarya",
""
],
[
"Fan",
"Pinchen",
""
],
[
"He",
"Vincent F.",
""
],
[
"Bloom",
"Malachy",
""
],
[
"Yang",
"Suyu Michael",
""
],
[
"Tasson",
"Jay D.",
""
],
[
"Creighton",
"Jolien D. E.",
""
]
] | The speed of gravitational waves $v_g$ can be measured with the time delay between gravitational-wave detectors. Our study provides a more precise measurement of $v_g$ using gravitational-wave signals only, compared with previous studies. We select 52 gravitational-wave events that were detected with high confidence by... |
2212.05536 | Bahram Mashhoon | Javad Tabatabaei, Shant Baghram, and Bahram Mashhoon | Local Limit of Nonlocal Gravity: A Teleparallel Extension of General
Relativity | 30 pages; v2: expanded discussion of the modified flat model
regarding H_0 tension; v3: treatment expanded, presentation improved | Monthly Notices of the Royal Astronomical Society 530, 795-811
(2024) | 10.1093/mnras/stae830 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We describe a general constitutive framework for a teleparallel extension of
the general theory of relativity. This approach goes beyond the teleparallel
equivalent of general relativity (TEGR) by broadening the analogy with the
electrodynamics of media. In particular, the main purpose of this paper is to
investigate... | [
{
"created": "Sun, 11 Dec 2022 16:25:52 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Apr 2023 19:52:03 GMT",
"version": "v2"
},
{
"created": "Fri, 17 Nov 2023 11:22:33 GMT",
"version": "v3"
},
{
"created": "Thu, 11 Apr 2024 16:20:43 GMT",
"version": "v4"
}
] | 2024-04-12 | [
[
"Tabatabaei",
"Javad",
""
],
[
"Baghram",
"Shant",
""
],
[
"Mashhoon",
"Bahram",
""
]
] | We describe a general constitutive framework for a teleparallel extension of the general theory of relativity. This approach goes beyond the teleparallel equivalent of general relativity (TEGR) by broadening the analogy with the electrodynamics of media. In particular, the main purpose of this paper is to investigate i... |
0710.0214 | Hamid Reza Sepangi | K. Atazadeh and H. R. Sepangi | Curvature corrections in DGP brane cosmology | 11 pages, 2 figures | JCAP0709:020,2007 | 10.1088/1475-7516/2007/09/020 | null | gr-qc hep-th | null | We consider a DGP inspired brane scenario where the action on the brane is
augmented by a function of the Ricci scalar, ${\cal L}(R)$. The cosmological
implications that such a scenario entails are examined for $R^{n}$ and shown to
be consistent with a universe expanding with power-law acceleration. It is
shown that ... | [
{
"created": "Mon, 1 Oct 2007 06:55:25 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Atazadeh",
"K.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | We consider a DGP inspired brane scenario where the action on the brane is augmented by a function of the Ricci scalar, ${\cal L}(R)$. The cosmological implications that such a scenario entails are examined for $R^{n}$ and shown to be consistent with a universe expanding with power-law acceleration. It is shown that tw... |
1102.0053 | Sourav Bhattacharya | Sourav Bhattacharya and Amitabha Lahiri | No hair theorems for stationary axisymmetric black holes | v2, 10pp; minor changes, added references | Phys.Rev.D83:124017,2011 | 10.1103/PhysRevD.83.124017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a non-perturbative proof of the no hair theorems corresponding to
scalar and Proca fields for stationary axisymmetric de Sitter black hole
spacetimes. Our method also applies to asymptotically flat and under a
reasonable assumption, to asymptotically anti-de Sitter spacetimes.
| [
{
"created": "Tue, 1 Feb 2011 01:46:26 GMT",
"version": "v1"
},
{
"created": "Fri, 20 May 2011 05:35:56 GMT",
"version": "v2"
}
] | 2011-06-24 | [
[
"Bhattacharya",
"Sourav",
""
],
[
"Lahiri",
"Amitabha",
""
]
] | We present a non-perturbative proof of the no hair theorems corresponding to scalar and Proca fields for stationary axisymmetric de Sitter black hole spacetimes. Our method also applies to asymptotically flat and under a reasonable assumption, to asymptotically anti-de Sitter spacetimes. |
1709.05223 | Ho Lee | Ho Lee, Ernesto Nungesser | Late-time behaviour of the Einstein-Boltzmann system with a positive
cosmological constant | null | null | 10.1088/1361-6382/aa9c8f | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the Einstein-Boltzmann system for Israel particles
with a positive cosmological constant. We consider spatially homogeneous
solutions of Bianchi types except IX and obtain future global existence and
asymptotic behaviour of solutions to the Einstein-Boltzmann system. The result
shows that the s... | [
{
"created": "Fri, 15 Sep 2017 14:08:51 GMT",
"version": "v1"
}
] | 2017-12-27 | [
[
"Lee",
"Ho",
""
],
[
"Nungesser",
"Ernesto",
""
]
] | In this paper we study the Einstein-Boltzmann system for Israel particles with a positive cosmological constant. We consider spatially homogeneous solutions of Bianchi types except IX and obtain future global existence and asymptotic behaviour of solutions to the Einstein-Boltzmann system. The result shows that the sol... |
2302.08804 | Massimiliano Rinaldi | Matteo Fontana and Massimiliano Rinaldi | Stress-energy tensor correlations across regular black holes horizons | Version accepted for publication in PRD | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hawking radiation can be regarded as a spontaneous and continuous creation of
virtual particle-antiparticle pairs outside the event horizon of a black hole
where strong tidal forces prevent the annihilation: the particle escapes to
infinity contributing to the Hawking flux, while its corresponding antiparticle
partne... | [
{
"created": "Fri, 17 Feb 2023 10:57:18 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Nov 2023 13:33:35 GMT",
"version": "v2"
}
] | 2023-11-14 | [
[
"Fontana",
"Matteo",
""
],
[
"Rinaldi",
"Massimiliano",
""
]
] | Hawking radiation can be regarded as a spontaneous and continuous creation of virtual particle-antiparticle pairs outside the event horizon of a black hole where strong tidal forces prevent the annihilation: the particle escapes to infinity contributing to the Hawking flux, while its corresponding antiparticle partner ... |
1607.04481 | Riccardo Moriconi | Riccardo Moriconi, Giovanni Montani, Salvatore Capozziello | Big-bounce cosmology from quantum gravity: The case of a cyclical
Bianchi I universe | 15 pages, 9 figures | Phys. Rev. D 94, 023519, 2016 | 10.1103/PhysRevD.94.023519 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the classical and quantum dynamics of a Bianchi I model in the
presence of a small negative cosmological constant characterizing its evolution
in term of the dust-time dualism. We demonstrate that in a canonical metric
approach, the cosmological singularity is removed in correspondence to a
positive define... | [
{
"created": "Fri, 15 Jul 2016 12:32:53 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Sep 2016 10:29:45 GMT",
"version": "v2"
}
] | 2016-09-02 | [
[
"Moriconi",
"Riccardo",
""
],
[
"Montani",
"Giovanni",
""
],
[
"Capozziello",
"Salvatore",
""
]
] | We analyse the classical and quantum dynamics of a Bianchi I model in the presence of a small negative cosmological constant characterizing its evolution in term of the dust-time dualism. We demonstrate that in a canonical metric approach, the cosmological singularity is removed in correspondence to a positive defined ... |
2210.00900 | Mohd Salman | Absos Ali Shaikh, Musavvir Ali, Mohammad Salman and Fusun Ozen Zengin | Curvature inheritance symmetry on M-projectively flat spacetimes | null | International Journal of Geometric Methods in Modern Physics(2023) | 10.1142/S0219887823500883 | 2350088 | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | The paper aims to investigate curvature inheritance symmetry in
M-projectively flat spacetimes. It is shown that the curvature inheritance
symmetry in M-projectively flat spacetime is a conformal motion. We have proved
that M- projective curvature tensor follows the symmetry inheritance property
along a vector field ... | [
{
"created": "Fri, 30 Sep 2022 11:51:42 GMT",
"version": "v1"
}
] | 2023-02-02 | [
[
"Shaikh",
"Absos Ali",
""
],
[
"Ali",
"Musavvir",
""
],
[
"Salman",
"Mohammad",
""
],
[
"Zengin",
"Fusun Ozen",
""
]
] | The paper aims to investigate curvature inheritance symmetry in M-projectively flat spacetimes. It is shown that the curvature inheritance symmetry in M-projectively flat spacetime is a conformal motion. We have proved that M- projective curvature tensor follows the symmetry inheritance property along a vector field $\... |
gr-qc/9902055 | Amos Ori | Amos Ori | Remark on the strength of singularities with a C^0 metric | 3 pages, LaTeX | null | null | null | gr-qc | null | Recently Nolan constructed a spherically-symmetric spacetime admitting a
spacelike curvature singularity with a regular C^0 metric. We show here that
this singularity is in fact weak.
| [
{
"created": "Thu, 18 Feb 1999 21:36:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ori",
"Amos",
""
]
] | Recently Nolan constructed a spherically-symmetric spacetime admitting a spacelike curvature singularity with a regular C^0 metric. We show here that this singularity is in fact weak. |
gr-qc/0702082 | David Wiltshire | David L. Wiltshire | Cosmic clocks, cosmic variance and cosmic averages | 72 pages, 5 figures; v4 cosmetic fixes to match published paper, New
J. Phys. Focus Issue on Dark Energy; further summary at
http://www2.phys.canterbury.ac.nz/~dlw24/universe/ | NewJ.Phys.9:377,2007 | 10.1088/1367-2630/9/10/377 | null | gr-qc astro-ph hep-ph hep-th | null | Cosmic acceleration is explained quantitatively, purely in general
relativity, as an apparent effect due to quasilocal gravitational energy
differences that arise in the decoupling of bound systems from the global
expansion of the universe. "Dark energy" is recognised as a misidentification
of those aspects of gravit... | [
{
"created": "Thu, 15 Feb 2007 20:34:13 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Mar 2007 20:45:58 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Sep 2007 04:37:33 GMT",
"version": "v3"
},
{
"created": "Thu, 1 Nov 2007 04:18:11 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Wiltshire",
"David L.",
""
]
] | Cosmic acceleration is explained quantitatively, purely in general relativity, as an apparent effect due to quasilocal gravitational energy differences that arise in the decoupling of bound systems from the global expansion of the universe. "Dark energy" is recognised as a misidentification of those aspects of gravitat... |
1505.02448 | Edward Anderson | Edward Anderson | Spherical Relationalism | 8 pages, including 2 figs | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper considers passing from the usual $\mathbb{R}^d$ model of absolute
space to $\mathbb{S}^d$ at the level of relational particle models. Both
approaches' $d = 1$ cases are rather simpler than their $d \geq 2$ cases, with
$N$ particles in $\mathbb{S}^1$ admitting a straightforward reduction with
shape space $\... | [
{
"created": "Sun, 10 May 2015 22:11:49 GMT",
"version": "v1"
}
] | 2015-05-12 | [
[
"Anderson",
"Edward",
""
]
] | This paper considers passing from the usual $\mathbb{R}^d$ model of absolute space to $\mathbb{S}^d$ at the level of relational particle models. Both approaches' $d = 1$ cases are rather simpler than their $d \geq 2$ cases, with $N$ particles in $\mathbb{S}^1$ admitting a straightforward reduction with shape space $\ma... |
2210.10907 | Liu Zhao | Song Liu, Xin Hao, Shaofan Liu, and Liu Zhao | Covariant transport equation and gravito-conductivity in generic
stationary spacetimes | 16 pages. v2: misc corrections and new subsection on weak field
limit. v3: version published in EPJC | EPJC 82:1100, 2022 | 10.1140/epjc/s10052-022-11093-3 | null | gr-qc cond-mat.stat-mech hep-th | http://creativecommons.org/licenses/by/4.0/ | We find a near detailed balance solution to the relativistic Boltzmann
equation under the relaxation time approximation with a collision term which
differs from the Anderson-Witting model and is dependent on the stationary
observer. Using this new solution, we construct an explicit covariant transport
equation for th... | [
{
"created": "Wed, 19 Oct 2022 22:13:52 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Oct 2022 16:55:37 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Dec 2022 00:01:09 GMT",
"version": "v3"
}
] | 2022-12-08 | [
[
"Liu",
"Song",
""
],
[
"Hao",
"Xin",
""
],
[
"Liu",
"Shaofan",
""
],
[
"Zhao",
"Liu",
""
]
] | We find a near detailed balance solution to the relativistic Boltzmann equation under the relaxation time approximation with a collision term which differs from the Anderson-Witting model and is dependent on the stationary observer. Using this new solution, we construct an explicit covariant transport equation for the ... |
1207.4353 | Andrea Dapor | Michal Artymowski, Andrea Dapor, Tomasz Pawlowski | Inflation from non-minimally coupled scalar field in loop quantum
cosmology | Clarity improved. Replaced with revised version accepted in JCAP | null | 10.1088/1475-7516/2013/06/010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The FRW model with non-minimally coupled massive scalar field has been
investigated in LQC framework. Considered form of the potential and coupling
allows applications to Higgs driven inflation. Out of two frames used in the
literature to describe such systems: Jordan and Einstein frame, the latter one
is applied. Sp... | [
{
"created": "Wed, 18 Jul 2012 12:03:48 GMT",
"version": "v1"
},
{
"created": "Fri, 17 May 2013 13:17:33 GMT",
"version": "v2"
},
{
"created": "Mon, 20 May 2013 12:14:56 GMT",
"version": "v3"
}
] | 2015-06-05 | [
[
"Artymowski",
"Michal",
""
],
[
"Dapor",
"Andrea",
""
],
[
"Pawlowski",
"Tomasz",
""
]
] | The FRW model with non-minimally coupled massive scalar field has been investigated in LQC framework. Considered form of the potential and coupling allows applications to Higgs driven inflation. Out of two frames used in the literature to describe such systems: Jordan and Einstein frame, the latter one is applied. Spec... |
2201.03583 | Marko Toros | Sougato Bose, Anupam Mazumdar, Martine Schut, and Marko Toro\v{s} | Mechanism for the quantum natured gravitons to entangle masses | Accepted for publication in PRD; 13 pages | Phys. Rev. D 105, 106028 (2022) | 10.1103/PhysRevD.105.106028 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper points out the importance of the quantum nature of the
gravitational interaction with matter in a linearized theory of quantum gravity
induced entanglement of masses (QGEM). We will show how the quantum interaction
entangles the steady states of a closed system (eigenstates) of two test masses
placed in th... | [
{
"created": "Mon, 10 Jan 2022 19:00:06 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Feb 2022 18:41:50 GMT",
"version": "v2"
},
{
"created": "Wed, 18 May 2022 15:36:08 GMT",
"version": "v3"
}
] | 2022-06-03 | [
[
"Bose",
"Sougato",
""
],
[
"Mazumdar",
"Anupam",
""
],
[
"Schut",
"Martine",
""
],
[
"Toroš",
"Marko",
""
]
] | This paper points out the importance of the quantum nature of the gravitational interaction with matter in a linearized theory of quantum gravity induced entanglement of masses (QGEM). We will show how the quantum interaction entangles the steady states of a closed system (eigenstates) of two test masses placed in the ... |
0801.4257 | Hossein Farajollahi | Hossein Farajollahi | Time and Dirac Observables in Friedmann Cosmologies | 11 pages | Int.J.Theor.Phys.47:1479-1489,2008 | 10.1007/s10773-007-9628-3 | null | gr-qc | null | A cosmological time variable is emerged from the Hamiltonian formulation of
Friedmann model to measure the evolution of dynamical observables in the
theory. A set of observables has been identified for the theory on the null
hypersurfaces that its evolution is with respect to the volume clock introduced
by the cosmol... | [
{
"created": "Mon, 28 Jan 2008 12:41:17 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Farajollahi",
"Hossein",
""
]
] | A cosmological time variable is emerged from the Hamiltonian formulation of Friedmann model to measure the evolution of dynamical observables in the theory. A set of observables has been identified for the theory on the null hypersurfaces that its evolution is with respect to the volume clock introduced by the cosmolog... |
gr-qc/0012064 | Esposito Giampiero | Giampiero Esposito and Cosimo Stornaiolo | The Role of Elliptic Operators in the Initial-Value Problem for General
Relativity | 9 pages, Latex | null | null | DSF preprint 2000/40 | gr-qc | null | The Arnowitt-Deser-Misner (ADM) equations are deeply intertwined with
discrete spectral resolutions of an elliptic operator of Laplace type
associated with the spacelike hypersurfaces which foliate the space-time
manifold, and the non-linearities of the four-dimensional hyperbolic theory are
mapped into the potential... | [
{
"created": "Mon, 18 Dec 2000 15:07:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Esposito",
"Giampiero",
""
],
[
"Stornaiolo",
"Cosimo",
""
]
] | The Arnowitt-Deser-Misner (ADM) equations are deeply intertwined with discrete spectral resolutions of an elliptic operator of Laplace type associated with the spacelike hypersurfaces which foliate the space-time manifold, and the non-linearities of the four-dimensional hyperbolic theory are mapped into the potential t... |
2009.10948 | Vilson T. Zanchin | Angel D. D. Masa, Enesson S. de Oliveira, Vilson T. Zanchin | Stability of regular black holes and other compact objects with a
charged de Sitter core and a surface matter layer | 25 pages, 18 figures (reduced from 27 figures/first version of the
manuscript), new references added | Phys. Rev. D 103, 104051 (2021) | 10.1103/PhysRevD.103.104051 | null | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The stability and other physical properties of a class of regular black
holes, quasiblack holes, and other electrically charged compact objects are
investigated in the present work. The compact objects are obtained by solving
the Einstein-Maxwell system of equations assuming spherical symmetry in a
static spacetime. ... | [
{
"created": "Wed, 23 Sep 2020 06:35:30 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Dec 2020 21:54:20 GMT",
"version": "v2"
},
{
"created": "Wed, 11 Aug 2021 02:25:53 GMT",
"version": "v3"
}
] | 2021-08-12 | [
[
"Masa",
"Angel D. D.",
""
],
[
"de Oliveira",
"Enesson S.",
""
],
[
"Zanchin",
"Vilson T.",
""
]
] | The stability and other physical properties of a class of regular black holes, quasiblack holes, and other electrically charged compact objects are investigated in the present work. The compact objects are obtained by solving the Einstein-Maxwell system of equations assuming spherical symmetry in a static spacetime. Th... |
gr-qc/9403015 | Miquel Dorca. Fisica Teorica Uab. | Miquel Dorca, Enric Verdaguer | Particle creation in a colliding plane wave spacetime: wave packet
quantization | 23, latex, figures available by fax | Phys.Rev. D50 (1994) 2631-2644 | 10.1103/PhysRevD.50.2631 | UAB-FT-334 | gr-qc | null | We use wave packet mode quantization to compute the creation of massless
scalar quantum particles in a colliding plane wave spacetime. The background
spacetime represents the collision of two gravitational shock waves followed by
trailing gravitational radiation which focus into a Killing-Cauchy horizon. The
use of w... | [
{
"created": "Wed, 9 Mar 1994 15:13:40 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Dorca",
"Miquel",
""
],
[
"Verdaguer",
"Enric",
""
]
] | We use wave packet mode quantization to compute the creation of massless scalar quantum particles in a colliding plane wave spacetime. The background spacetime represents the collision of two gravitational shock waves followed by trailing gravitational radiation which focus into a Killing-Cauchy horizon. The use of wav... |
2002.02435 | Jorge Ananias Neto | Everton M. C. Abreu, Jorge Ananias Neto, Ed\'esio M. Barboza Jr.,
Albert C. R. Mendes and Br\'aulio B. Soares | On the equipartition theorem and black holes nongaussian entropies | Revised version. To appear in MPLA | null | 10.1142/S0217732320502661 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this Letter we have shown that, from the standard thermodynamic functions,
the mathematical form of an equipartition theorem may be related to the
algebraic expression of a particular entropy initially chosen to describe the
black hole thermodynamics. Namely, we have different equipartition expressions
for distinc... | [
{
"created": "Thu, 6 Feb 2020 18:36:40 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Aug 2020 19:56:16 GMT",
"version": "v2"
}
] | 2020-11-18 | [
[
"Abreu",
"Everton M. C.",
""
],
[
"Neto",
"Jorge Ananias",
""
],
[
"Barboza",
"Edésio M.",
"Jr."
],
[
"Mendes",
"Albert C. R.",
""
],
[
"Soares",
"Bráulio B.",
""
]
] | In this Letter we have shown that, from the standard thermodynamic functions, the mathematical form of an equipartition theorem may be related to the algebraic expression of a particular entropy initially chosen to describe the black hole thermodynamics. Namely, we have different equipartition expressions for distinct ... |
gr-qc/0702020 | Dmitri Vassiliev | Dmitri Vassiliev | A teleparallel representation of the Weyl Lagrangian | Submitted to the Proceedings of the Eleventh Marcel Grossmann Meeting | Proceedings of the Eleventh Marcel Grossmann Meeting on General
Relativity (in 3 volumes, editors H.Kleinert and R.T.Jantzen, series editor
R.Ruffini), World Scientific, 2008, part B, p. 1245-1247. | null | null | gr-qc math.DG | null | The main result of the paper is a new representation of the Weyl Lagrangian
(massless Dirac Lagrangian). As the dynamical variable we use the coframe, i.e.
an orthonormal tetrad of covector fields. We write down a simple Lagrangian -
wedge product of axial torsion with a lightlike element of the coframe - and
show th... | [
{
"created": "Sat, 3 Feb 2007 18:38:39 GMT",
"version": "v1"
}
] | 2009-10-03 | [
[
"Vassiliev",
"Dmitri",
""
]
] | The main result of the paper is a new representation of the Weyl Lagrangian (massless Dirac Lagrangian). As the dynamical variable we use the coframe, i.e. an orthonormal tetrad of covector fields. We write down a simple Lagrangian - wedge product of axial torsion with a lightlike element of the coframe - and show that... |
1509.02476 | Tomi Koivisto | Jose Beltr\'an Jim\'enez, Tomi S. Koivisto | Spacetimes with vector distortion: Inflation from generalised Weyl
geometry | 5 pages, 1 table, 0 figures. V2: Added the general quadratic theory | null | 10.1016/j.physletb.2016.03.047 | NORDITA-2015-100 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spacetime with general linear vector distortion is introduced. Thus, the
torsion and the nonmetricity of the affine connection are assumed to be
proportional to a vector field (and not its derivatives). The resulting
two-parameter family of non-Riemannian geometries generalises the conformal
Weyl geometry and some ot... | [
{
"created": "Tue, 8 Sep 2015 18:07:26 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Jan 2016 16:20:05 GMT",
"version": "v2"
}
] | 2016-03-23 | [
[
"Jiménez",
"Jose Beltrán",
""
],
[
"Koivisto",
"Tomi S.",
""
]
] | Spacetime with general linear vector distortion is introduced. Thus, the torsion and the nonmetricity of the affine connection are assumed to be proportional to a vector field (and not its derivatives). The resulting two-parameter family of non-Riemannian geometries generalises the conformal Weyl geometry and some othe... |
2004.00003 | Emanuele Berti | F\'elix-Louis Juli\'e, Emanuele Berti | $d+1$ formalism in Einstein-scalar-Gauss-Bonnet gravity | 10 pages. v2: fixed references, no changes to the main text | Phys. Rev. D 101, 124045 (2020) | 10.1103/PhysRevD.101.124045 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the $d+1$ formulation of Einstein-scalar-Gauss-Bonnet (ESGB)
theories in dimension $D=d+1$ and for arbitrary (spacelike or timelike)
slicings. We first build an action which generalizes those of
Gibbons-Hawking-York and Myers to ESGB theories, showing that they can be
described by a Dirichlet variational p... | [
{
"created": "Mon, 30 Mar 2020 18:00:01 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Apr 2020 16:32:39 GMT",
"version": "v2"
}
] | 2020-07-01 | [
[
"Julié",
"Félix-Louis",
""
],
[
"Berti",
"Emanuele",
""
]
] | We present the $d+1$ formulation of Einstein-scalar-Gauss-Bonnet (ESGB) theories in dimension $D=d+1$ and for arbitrary (spacelike or timelike) slicings. We first build an action which generalizes those of Gibbons-Hawking-York and Myers to ESGB theories, showing that they can be described by a Dirichlet variational pri... |
1601.07952 | Ettore Minguzzi | E. Minguzzi | Special coordinate systems in pseudo-Finsler geometry and the
equivalence principle | 20 pages | Journal of Geometry and Physics 114 (2017) 336--347 | 10.1016/j.geomphys.2016.12.013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Special coordinate systems are constructed in a neighborhood of a point or of
a curve. Taylor expansions can then be easily inferred for the metric, the
connection, or the Finsler Lagrangian in terms of curvature invariants. These
coordinates circumvent the difficulties of the normal and Fermi coordinates in
Finsler ... | [
{
"created": "Fri, 29 Jan 2016 00:07:17 GMT",
"version": "v1"
}
] | 2017-02-27 | [
[
"Minguzzi",
"E.",
""
]
] | Special coordinate systems are constructed in a neighborhood of a point or of a curve. Taylor expansions can then be easily inferred for the metric, the connection, or the Finsler Lagrangian in terms of curvature invariants. These coordinates circumvent the difficulties of the normal and Fermi coordinates in Finsler ge... |
0901.1258 | Zurab Silagadze | Z.K. Silagadze | Quantum gravity, minimum length and Keplerian orbits | 4 pages, revtex4, version to be published in Phys. Lett. A | Phys.Lett.A373:2643-2645,2009 | 10.1016/j.physleta.2009.05.053 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We conjecture that the modified commutation relations suggested in the
context of quantum gravity (QG) persist also in the classical limit, if the
momentum of the classical object is not too large, and calculate the
corresponding perihelion precession rate for Keplerian orbits.
| [
{
"created": "Fri, 9 Jan 2009 15:39:24 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Jan 2009 04:15:14 GMT",
"version": "v2"
},
{
"created": "Thu, 28 May 2009 07:39:05 GMT",
"version": "v3"
}
] | 2009-07-24 | [
[
"Silagadze",
"Z. K.",
""
]
] | We conjecture that the modified commutation relations suggested in the context of quantum gravity (QG) persist also in the classical limit, if the momentum of the classical object is not too large, and calculate the corresponding perihelion precession rate for Keplerian orbits. |
1911.06110 | Qingdi Wang | Qingdi Wang and William G. Unruh | How the cosmological constant is hidden by Planck scale curvature
fluctuations | 5 pages. v2 corrected some nonessential misunderstandings on the
letter Phys. Rev. Lett. 123, 131302(2019) presented in the beginning of
Sec.II of v1. v3 has further important revisions | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is argued in a recent letter Phys. Rev. Lett. 123, 131302(2019) that the
effect of a large cosmological constant can be naturally hidden in Planck scale
curvature fluctuations. We point out that there are problems with the author's
arguments. The hiding of the cosmological constant proposed in the letter by
choosi... | [
{
"created": "Wed, 13 Nov 2019 09:00:58 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Nov 2019 11:15:43 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Nov 2019 06:20:01 GMT",
"version": "v3"
}
] | 2019-11-26 | [
[
"Wang",
"Qingdi",
""
],
[
"Unruh",
"William G.",
""
]
] | It is argued in a recent letter Phys. Rev. Lett. 123, 131302(2019) that the effect of a large cosmological constant can be naturally hidden in Planck scale curvature fluctuations. We point out that there are problems with the author's arguments. The hiding of the cosmological constant proposed in the letter by choosing... |
1009.2266 | Merab Gogberashvili Prof | Merab Gogberashvili and Igor Kanatchikov | On the fine structure constant in the Machian universe | 6 pages, Some modifications in text and formulas were done,
discussion and references added | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the Machian model of the universe the dark energy is identified with
the Machian energy of collective gravitational interactions of all particles
inside the horizon. It is shown that the fine structure constant can be
expressed in terms of the observed radiative, baryon and dark energy densities
of the univers... | [
{
"created": "Sun, 5 Sep 2010 15:01:05 GMT",
"version": "v1"
},
{
"created": "Sun, 26 Sep 2010 17:57:01 GMT",
"version": "v2"
}
] | 2010-09-28 | [
[
"Gogberashvili",
"Merab",
""
],
[
"Kanatchikov",
"Igor",
""
]
] | Within the Machian model of the universe the dark energy is identified with the Machian energy of collective gravitational interactions of all particles inside the horizon. It is shown that the fine structure constant can be expressed in terms of the observed radiative, baryon and dark energy densities of the universe ... |
1512.02947 | Jan Ostrowski | Jan J. Ostrowski, Boudewijn F. Roukema | On the Green and Wald formalism | Contribution to the proceedings of MG14 | null | 10.1142/9789813226609_0264 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Backreaction in the cosmological context is a longstanding problem that is
especially important in the present era of precise cosmology. The standard
model of a homogeneous background plus density perturbations is most probably
oversimplified and is expected to fail to fully account for the near-future
observations o... | [
{
"created": "Wed, 9 Dec 2015 17:15:20 GMT",
"version": "v1"
}
] | 2017-12-27 | [
[
"Ostrowski",
"Jan J.",
""
],
[
"Roukema",
"Boudewijn F.",
""
]
] | Backreaction in the cosmological context is a longstanding problem that is especially important in the present era of precise cosmology. The standard model of a homogeneous background plus density perturbations is most probably oversimplified and is expected to fail to fully account for the near-future observations of ... |
1010.2052 | Yuri Pavlov | A. A. Grib, Yu. V. Pavlov | On particles collisions near rotating black holes | LaTeX, 5 pages, 1 figure. arXiv admin note: substantial text overlap
with arXiv:1004.0913 | Grav. Cosmol.17:42-46, 2011 | 10.1134/S0202289311010099 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scattering of particles with different masses and energy in the gravitational
field of rotating black holes is considered as outside as inside the black
hole. Expressions for scattering energy of particles in the centre of mass
system are obtained. It is shown that scattering energy of particles in the
centre of mass... | [
{
"created": "Mon, 11 Oct 2010 10:05:10 GMT",
"version": "v1"
}
] | 2014-11-05 | [
[
"Grib",
"A. A.",
""
],
[
"Pavlov",
"Yu. V.",
""
]
] | Scattering of particles with different masses and energy in the gravitational field of rotating black holes is considered as outside as inside the black hole. Expressions for scattering energy of particles in the centre of mass system are obtained. It is shown that scattering energy of particles in the centre of mass s... |
1611.00431 | Ethan Honda | Ethan P. Honda | RN-AdS Nontopoligical Solitons in Broken Einstein-Maxwell-Higgs Theory | 20 pages, 27 figures, 2 tables | null | 10.1103/PhysRevD.95.024032 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Results are presented from numerical simulations of the
Einstein-Maxwell-Higgs equations with a broken U(1) symmetry. Coherent
nontopological soliton solutions are shown to exist that separate an Anti-de
Sitter (AdS) true vacuum interior from a Reissner-Nordstrom (RN) false vacuum
exterior. The stability of these bub... | [
{
"created": "Wed, 2 Nov 2016 00:31:25 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Jan 2017 01:43:13 GMT",
"version": "v2"
}
] | 2017-03-08 | [
[
"Honda",
"Ethan P.",
""
]
] | Results are presented from numerical simulations of the Einstein-Maxwell-Higgs equations with a broken U(1) symmetry. Coherent nontopological soliton solutions are shown to exist that separate an Anti-de Sitter (AdS) true vacuum interior from a Reissner-Nordstrom (RN) false vacuum exterior. The stability of these bubbl... |
1408.3928 | Sunandan Gangopadhyay | Abhijit Dutta, Sunandan Gangopadhyay | Thermodynamics of black holes and the symmetric generalized uncertainty
principle | References added | Int .J . Theor Phys. 55 (2016) 2746 | 10.1007/s10773-015-2907-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have investigated the thermodynamics of Schwarzschild black
holes using the symmetric generalized uncertainty principle which contains
correction terms involving momentum and position uncertainty. We obtain the
mass-temperature relation and the heat capacity of the black hole using which
we compute ... | [
{
"created": "Mon, 18 Aug 2014 08:34:30 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Aug 2014 05:10:31 GMT",
"version": "v2"
}
] | 2016-05-11 | [
[
"Dutta",
"Abhijit",
""
],
[
"Gangopadhyay",
"Sunandan",
""
]
] | In this paper, we have investigated the thermodynamics of Schwarzschild black holes using the symmetric generalized uncertainty principle which contains correction terms involving momentum and position uncertainty. We obtain the mass-temperature relation and the heat capacity of the black hole using which we compute th... |
gr-qc/0008022 | Dr G. A. Jaroszkiewicz | George Jaroszkiewicz (School of Mathematical Sciences, University of
Nottingham, UK) | Causal Implication and the Origin of Time Dilation | 11 pages, 1 eps figure. Second replacement amends the diagram | null | null | null | gr-qc | null | We discuss the emergence of time dilation as a normal feature expected of any
system where a central processor may have to wait one or more clock cycles
before concluding a local calculation. We show how the process of causal
implication in a typical Newtonian cellular automaton leads naturally to
Lorentz transformat... | [
{
"created": "Wed, 9 Aug 2000 15:47:10 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Aug 2000 10:50:45 GMT",
"version": "v2"
},
{
"created": "Mon, 21 Aug 2000 20:25:26 GMT",
"version": "v3"
}
] | 2009-09-25 | [
[
"Jaroszkiewicz",
"George",
"",
"School of Mathematical Sciences, University of\n Nottingham, UK"
]
] | We discuss the emergence of time dilation as a normal feature expected of any system where a central processor may have to wait one or more clock cycles before concluding a local calculation. We show how the process of causal implication in a typical Newtonian cellular automaton leads naturally to Lorentz transformatio... |
gr-qc/0208065 | James M. Overduin | T. Fukui, J. M. Overduin | Dynamics of a Generalized Cosmological Scalar-Tensor Theory | 13 pages | Int.J.Mod.Phys. D11 (2002) 669-684 | 10.1142/S0218271802001901 | null | gr-qc | null | A generalized scalar-tensor theory is investigated whose cosmological term
depends on both a scalar field and its time derivative. A correspondence with
solutions of five-dimensional Space-Time-Matter theory is noted. Analytic
solutions are found for the scale factor, scalar field and cosmological term.
Models with f... | [
{
"created": "Thu, 22 Aug 2002 16:07:48 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Fukui",
"T.",
""
],
[
"Overduin",
"J. M.",
""
]
] | A generalized scalar-tensor theory is investigated whose cosmological term depends on both a scalar field and its time derivative. A correspondence with solutions of five-dimensional Space-Time-Matter theory is noted. Analytic solutions are found for the scale factor, scalar field and cosmological term. Models with fre... |
gr-qc/9709037 | Neil John Cornish | Neil J. Cornish (Cambridge), Janna J. Levin (UC Berkeley) | The mixmaster universe is unambiguously chaotic | 3 pages, 2 figures. To appear in the proceedings of the Eighth Marcel
Grossmann Meeting, Jerusalem, June 1997 (WSP) | null | null | DAMTP-R97-49 | gr-qc | null | The Mixmaster or Bianchi IX cosmological model has become one of the
archetypal settings for studying gravitational dynamics. The past decade has
seen a vigourous debate about whether or not the Mixmaster's dynamics is
chaotic. In this talk we review our recent work in uncovering a chaotic
invariant set of orbits in ... | [
{
"created": "Mon, 15 Sep 1997 12:42:42 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Cornish",
"Neil J.",
"",
"Cambridge"
],
[
"Levin",
"Janna J.",
"",
"UC Berkeley"
]
] | The Mixmaster or Bianchi IX cosmological model has become one of the archetypal settings for studying gravitational dynamics. The past decade has seen a vigourous debate about whether or not the Mixmaster's dynamics is chaotic. In this talk we review our recent work in uncovering a chaotic invariant set of orbits in th... |
2210.10154 | Remigiusz Durka | Remigiusz Durka, Jerzy Kowalski-Glikman | A tale of two theories of gravity in asymptotically Anti-de Sitter
spacetime | 22 pages, v2 (improved version prepared for publication with the
extended supplement file and new references added) | null | 10.1007/JHEP02(2023)029 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We consider two BF formulations of the theory of gravity with a negative
cosmological constant, of Plebanski and of MacDowell-Mansouri. Both give the
standard Einstein equations in the bulk but differ in expressions of edge
charges. We compute the asymptotic charges explicitly in both theories for
AdS-Schwarzschild, ... | [
{
"created": "Tue, 18 Oct 2022 20:36:41 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Oct 2022 17:49:54 GMT",
"version": "v2"
}
] | 2023-02-15 | [
[
"Durka",
"Remigiusz",
""
],
[
"Kowalski-Glikman",
"Jerzy",
""
]
] | We consider two BF formulations of the theory of gravity with a negative cosmological constant, of Plebanski and of MacDowell-Mansouri. Both give the standard Einstein equations in the bulk but differ in expressions of edge charges. We compute the asymptotic charges explicitly in both theories for AdS-Schwarzschild, Ad... |
1901.06952 | Mu-Tao Wang | Po-Ning Chen, Mu-Tao Wang, Ye-Kai Wang, and Shing-Tung Yau | Quasi-local mass at null infinity in Bondi-Sachs coordinates | 11 pages | null | null | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are two important statements regarding the Trautman-Bondi mass at null
infinity: one is the positivity, and the other is the Bondi mass loss formula,
which are both global in nature. In this note, we compute the limit of the
Wang-Yau quasi-local mass on unit spheres at null infinity of an asymptotically
flat sp... | [
{
"created": "Mon, 21 Jan 2019 15:10:55 GMT",
"version": "v1"
}
] | 2019-01-23 | [
[
"Chen",
"Po-Ning",
""
],
[
"Wang",
"Mu-Tao",
""
],
[
"Wang",
"Ye-Kai",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | There are two important statements regarding the Trautman-Bondi mass at null infinity: one is the positivity, and the other is the Bondi mass loss formula, which are both global in nature. In this note, we compute the limit of the Wang-Yau quasi-local mass on unit spheres at null infinity of an asymptotically flat spac... |
0707.3395 | Marko Vojinovic | Milovan Vasilic, Marko Vojinovic | Classical Spinning Branes in Curved Backgrounds | null | JHEP 0707:028,2007 | 10.1088/1126-6708/2007/07/028 | null | gr-qc hep-th | null | The dynamics of a classical branelike object in a curved background is
derived from the covariant stress-energy conservation of the brane matter. The
world sheet equations and boundary conditions are obtained in the pole-dipole
approximation, where nontrivial brane thickness gives rise to its intrinsic
angular moment... | [
{
"created": "Mon, 23 Jul 2007 19:51:48 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Feb 2008 15:13:20 GMT",
"version": "v2"
}
] | 2010-01-15 | [
[
"Vasilic",
"Milovan",
""
],
[
"Vojinovic",
"Marko",
""
]
] | The dynamics of a classical branelike object in a curved background is derived from the covariant stress-energy conservation of the brane matter. The world sheet equations and boundary conditions are obtained in the pole-dipole approximation, where nontrivial brane thickness gives rise to its intrinsic angular momentum... |
1506.00487 | Marek Czachor | Diederik Aerts, Marek Czachor, Maciej Kuna | Crystallization of space: Space-time fractals from fractal arithmetic | version accepted in Chaos, Solitons & Fractals | Chaos, Solitons and Fractals 83 (2016) 201-211 | 10.1016/j.chaos.2015.12.004 | null | gr-qc math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Fractals such as the Cantor set can be equipped with intrinsic arithmetic
operations (addition, subtraction, multiplication, division) that map the
fractal into itself. The arithmetics allows one to define calculus and algebra
intrinsic to the fractal in question, and one can formulate classical and
quantum physics w... | [
{
"created": "Mon, 1 Jun 2015 13:28:56 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jun 2015 10:53:41 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Dec 2015 17:39:26 GMT",
"version": "v3"
}
] | 2016-01-20 | [
[
"Aerts",
"Diederik",
""
],
[
"Czachor",
"Marek",
""
],
[
"Kuna",
"Maciej",
""
]
] | Fractals such as the Cantor set can be equipped with intrinsic arithmetic operations (addition, subtraction, multiplication, division) that map the fractal into itself. The arithmetics allows one to define calculus and algebra intrinsic to the fractal in question, and one can formulate classical and quantum physics wit... |
0808.2225 | Richard Umstaetter | Richard Umstaetter, Renate Meyer, Nelson Christensen | A Bayesian method to set upper limits on the strength of a periodic
gravitational wave signal from the remnant of SN1987A: possible applications
in LIGO searches | 11 pages, 3 figures (1, 2a,b, 3a,b,c,d) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a method that assesses the theoretical detection limit of a
Bayesian Markov chain Monte Carlo search for a periodic gravitational wave
signal emitted by a neutron star. Inverse probability yields an upper limit
estimate for the strength when a signal could not be detected in an observed
data set. The propo... | [
{
"created": "Sat, 16 Aug 2008 00:53:51 GMT",
"version": "v1"
}
] | 2008-08-19 | [
[
"Umstaetter",
"Richard",
""
],
[
"Meyer",
"Renate",
""
],
[
"Christensen",
"Nelson",
""
]
] | We present a method that assesses the theoretical detection limit of a Bayesian Markov chain Monte Carlo search for a periodic gravitational wave signal emitted by a neutron star. Inverse probability yields an upper limit estimate for the strength when a signal could not be detected in an observed data set. The propose... |
0809.1272 | Mahmood Roshan | Mahmood Roshan and Fatimah Shojai | Palatini f(R) gravity and Noether symmetry | 4 pages,to appear in physics letters B | Phys.Lett.B668:238-240,2008 | 10.1016/j.physletb.2008.08.036 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study Palatini f(R) cosmology using Noether symmetry approach for the
matter dominated universe. In order to construct a point-like Lagrangian in the
flat FRW space time, we use the dynamical equivalence between f(R) gravity and
scalar-tensor theories. The existence of Noether symmetry of the cosmological
f(R) Lag... | [
{
"created": "Mon, 8 Sep 2008 04:41:37 GMT",
"version": "v1"
}
] | 2011-05-19 | [
[
"Roshan",
"Mahmood",
""
],
[
"Shojai",
"Fatimah",
""
]
] | We study Palatini f(R) cosmology using Noether symmetry approach for the matter dominated universe. In order to construct a point-like Lagrangian in the flat FRW space time, we use the dynamical equivalence between f(R) gravity and scalar-tensor theories. The existence of Noether symmetry of the cosmological f(R) Lagra... |
gr-qc/0610087 | Eugen Radu | Yves Brihaye, Eugen Radu and D. H. Tchrakian | Einstein-Yang-Mills solutions in higher dimensional de Sitter spacetime | 17 pages, 8 figures | Phys.Rev.D75:024022,2007 | 10.1103/PhysRevD.75.024022 | null | gr-qc hep-th | null | We consider particle-like and black holes solutions of the
Einstein-Yang-Mills system with positive cosmological constant in d>4 spacetime
dimensions. These configurations are spherically symmetric and present a
cosmological horizon for a finite value of the radial coordinate, approaching
asymptotically the de Sitter... | [
{
"created": "Tue, 17 Oct 2006 16:29:50 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Dec 2006 13:35:57 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Brihaye",
"Yves",
""
],
[
"Radu",
"Eugen",
""
],
[
"Tchrakian",
"D. H.",
""
]
] | We consider particle-like and black holes solutions of the Einstein-Yang-Mills system with positive cosmological constant in d>4 spacetime dimensions. These configurations are spherically symmetric and present a cosmological horizon for a finite value of the radial coordinate, approaching asymptotically the de Sitter b... |
2407.15069 | Andronikos Paliathanasis | Andronikos Paliathanasis | Dipole Cosmology in $f(Q)$-gravity | 26 pages, 6 figures, to appear in Physics Dark Universe | null | null | null | gr-qc astro-ph.CO hep-ph math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | Symmetric teleparallel $f(Q)$-gravity allows for the presence of a perfect
fluid with a tilted velocity in the Kantowski-Sachs geometry. In this dipole
model, we consider an ideal gas and we investigate the evolution of the
physical parameters. The tilt parameter is constrained by the nonlinear
function $f(Q)$ throug... | [
{
"created": "Sun, 21 Jul 2024 05:57:31 GMT",
"version": "v1"
}
] | 2024-07-23 | [
[
"Paliathanasis",
"Andronikos",
""
]
] | Symmetric teleparallel $f(Q)$-gravity allows for the presence of a perfect fluid with a tilted velocity in the Kantowski-Sachs geometry. In this dipole model, we consider an ideal gas and we investigate the evolution of the physical parameters. The tilt parameter is constrained by the nonlinear function $f(Q)$ through ... |
1404.3421 | Bruno Arderucio Costa | Bruno Arderucio | Superradiance: Classical, Relativistic and Quantum Aspects | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Several physical systems can be treated as a scattering process, and, for
these processes, a natural observed quantity arises: the ratio between the
reflected and incident intensities, known as the reflection coefficient. This
dissertation is concerned with the phenomenon known as superradiance, that is,
when this co... | [
{
"created": "Sun, 13 Apr 2014 20:20:02 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Jul 2014 19:07:16 GMT",
"version": "v2"
}
] | 2014-07-15 | [
[
"Arderucio",
"Bruno",
""
]
] | Several physical systems can be treated as a scattering process, and, for these processes, a natural observed quantity arises: the ratio between the reflected and incident intensities, known as the reflection coefficient. This dissertation is concerned with the phenomenon known as superradiance, that is, when this coef... |
1110.5885 | Lorenzo Sindoni | Daniele Oriti, Roberto Pereira, Lorenzo Sindoni | Coherent states in quantum gravity: a construction based on the flux
representation of LQG | 24 pages, 2 figures; Revised version to match the published one. Some
references added. Discussion of the resolution of the identity included | null | 10.1088/1751-8113/45/24/244004 | AEI-2011-076 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As part of a wider study of coherent states in (loop) quantum gravity, we
introduce a modification to the standard construction, based on the recently
introduced (non-commutative) flux representation. The resulting quantum states
have some welcomed features, in particular concerning peakedness properties,
when compar... | [
{
"created": "Wed, 26 Oct 2011 19:19:24 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Apr 2012 15:57:35 GMT",
"version": "v2"
}
] | 2015-05-30 | [
[
"Oriti",
"Daniele",
""
],
[
"Pereira",
"Roberto",
""
],
[
"Sindoni",
"Lorenzo",
""
]
] | As part of a wider study of coherent states in (loop) quantum gravity, we introduce a modification to the standard construction, based on the recently introduced (non-commutative) flux representation. The resulting quantum states have some welcomed features, in particular concerning peakedness properties, when compared... |
1609.03331 | Luis Herrera | L. Herrera, A. Di Prisco, J. Ospino | The spacetime outside a source of gravitational radiation: The axially
symmetric null fluid | 11 pages Latex. arXiv admin note: text overlap with arXiv:1609.02841.
Typos corrected, to appear in Eur. Phys. J. C | Eur. Phys. J. C, 76, 603, (2016) | 10.1140/epjc/s10052-016-4457-2 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We carry out a study of the exterior of an axially and reflection symmetric
source of gravitational radiation. The exterior of such a source is filled with
a null fluid produced by the dissipative processes inherent to the emission of
gravitational radiation, thereby representing a generalization of the Vaidya
metric... | [
{
"created": "Mon, 12 Sep 2016 10:20:15 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Nov 2016 16:00:35 GMT",
"version": "v2"
}
] | 2016-11-23 | [
[
"Herrera",
"L.",
""
],
[
"Di Prisco",
"A.",
""
],
[
"Ospino",
"J.",
""
]
] | We carry out a study of the exterior of an axially and reflection symmetric source of gravitational radiation. The exterior of such a source is filled with a null fluid produced by the dissipative processes inherent to the emission of gravitational radiation, thereby representing a generalization of the Vaidya metric f... |
2105.06153 | Pradip Mukherjee | Pradip Mukherjee and Abdus Sattar | Hamiltonian analysis of the Schroedinger field coupled with dynamic
non-relativistic gravity | 17 pages, Latex. arXiv admin note: text overlap with arXiv:1810.06244 | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Using the recently mooted Galilean gauge theory we have constructed the model
for the Schroedinger field interacting wuth gravity which is also dynamical.
The dynamics of gravity is dictated by the Newtonian action in the
Newton-Cartan spacetime. The theory is highly constrained . An elaborate
analysis of the constra... | [
{
"created": "Thu, 13 May 2021 09:10:03 GMT",
"version": "v1"
}
] | 2021-09-20 | [
[
"Mukherjee",
"Pradip",
""
],
[
"Sattar",
"Abdus",
""
]
] | Using the recently mooted Galilean gauge theory we have constructed the model for the Schroedinger field interacting wuth gravity which is also dynamical. The dynamics of gravity is dictated by the Newtonian action in the Newton-Cartan spacetime. The theory is highly constrained . An elaborate analysis of the constrain... |
0801.2896 | Serge Reynaud | Serge Reynaud, Brahim Lamine, Loic Duchayne, Peter Wolf, Marc-Thierry
Jaekel | Bounds on gravitational wave backgrounds from large distance clock
comparisons | 10 pages, 8 figures, minor amendments | Phys.Rev.D77:122003,2008 | 10.1103/PhysRevD.77.122003 | null | gr-qc astro-ph quant-ph | null | Our spacetime is filled with gravitational wave backgrounds that constitute a
fluctuating environment created by astrophysical and cosmological sources.
Bounds on these backgrounds are obtained from cosmological and astrophysical
data but also by analysis of ranging and Doppler signals from distant
spacecraft. We pro... | [
{
"created": "Fri, 18 Jan 2008 14:29:54 GMT",
"version": "v1"
},
{
"created": "Fri, 23 May 2008 12:56:17 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Reynaud",
"Serge",
""
],
[
"Lamine",
"Brahim",
""
],
[
"Duchayne",
"Loic",
""
],
[
"Wolf",
"Peter",
""
],
[
"Jaekel",
"Marc-Thierry",
""
]
] | Our spacetime is filled with gravitational wave backgrounds that constitute a fluctuating environment created by astrophysical and cosmological sources. Bounds on these backgrounds are obtained from cosmological and astrophysical data but also by analysis of ranging and Doppler signals from distant spacecraft. We propo... |
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