id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9506064 | Wontae Kim | Sung-Won Kim and Won T. Kim | Hawking Radiation and Evaporation of the Black Hole Induced by a
Klein-Gordon Soliton | 13 pages, latex, no figures | Phys.Lett. B361 (1995) 38-44 | 10.1016/0370-2693(95)01139-H | EWHAGC 101/95, SNUTP 95-069 | gr-qc | null | A two-dimensional dilatonic black hole induced by a topological soliton is
exactly solvable in the scalar field theory coupled to dilaton gravity. The
Hawking radiation of the black hole is studied in the one-loop approximation
with the help of the trace anomaly of energy-momentum tensors which is a
geometrical invar... | [
{
"created": "Wed, 28 Jun 1995 06:16:52 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Kim",
"Sung-Won",
""
],
[
"Kim",
"Won T.",
""
]
] | A two-dimensional dilatonic black hole induced by a topological soliton is exactly solvable in the scalar field theory coupled to dilaton gravity. The Hawking radiation of the black hole is studied in the one-loop approximation with the help of the trace anomaly of energy-momentum tensors which is a geometrical invaria... |
2304.01654 | Wei-Chen Lin | Wei-Chen Lin and Dong-han Yeom | Matching Radial Geodesics in Two Schwarzschild Spacetimes (e.g.
Black-to-White Hole Transition) or Schwarzschild and de Sitter Spacetimes
(e.g. Interior of a Non-singular Black Hole) | 34 pages, 10 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we study the trajectory equations of the bounded radial
geodesics in the generalized black-to-white hole bounce with mass difference
and the Schwarzschild-to-de Sitter transition approximated by the thin-shell
formalism. We first review the trajectories equations of the general radial
geodesics in Kr... | [
{
"created": "Tue, 4 Apr 2023 09:21:53 GMT",
"version": "v1"
}
] | 2023-04-05 | [
[
"Lin",
"Wei-Chen",
""
],
[
"Yeom",
"Dong-han",
""
]
] | In this article, we study the trajectory equations of the bounded radial geodesics in the generalized black-to-white hole bounce with mass difference and the Schwarzschild-to-de Sitter transition approximated by the thin-shell formalism. We first review the trajectories equations of the general radial geodesics in Krus... |
0801.4591 | Rod Aros Mr. | Rodrigo Aros | de Sitter Thermodynamics: A glimpse into non equilibrium | null | Phys.Rev.D77:104013,2008 | 10.1103/PhysRevD.77.104013 | null | gr-qc | null | In this article is shown that the thermodynamical evolution of a
Schwarzschild de Sitter space is the evaporation of its black hole. The result
is extended in higher dimensions to Lovelock theories of gravity with a single
positive cosmological constant.
| [
{
"created": "Wed, 30 Jan 2008 01:59:36 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Feb 2008 01:11:50 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Aros",
"Rodrigo",
""
]
] | In this article is shown that the thermodynamical evolution of a Schwarzschild de Sitter space is the evaporation of its black hole. The result is extended in higher dimensions to Lovelock theories of gravity with a single positive cosmological constant. |
gr-qc/0405062 | L. C. Garcia de Andrade | L.C. Garcia de Andrade | Non-Riemannian geometry of vortex acoustics | Some additions to the last section: Demonstration that torsion vector
is proportional to the number of vortices in the superfluid and some formulas
omitted | Phys.Rev.D70:064004,2004; Erratum-ibid.D70:129903,2004 | 10.1103/PhysRevD.70.064004 10.1103/PhysRevD.70.129903 | null | gr-qc | null | The concept of acoustic metric introduced previously by Unruh (PRL-1981) is
extended to include Cartan torsion by analogy with the scalar wave equation in
Riemann-Cartan (RC) spacetime. This equation describes irrotational
perturbations in rotational non-relativistic fluids. This physical motivation
allows us to show... | [
{
"created": "Wed, 12 May 2004 04:54:18 GMT",
"version": "v1"
},
{
"created": "Tue, 25 May 2004 14:14:34 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"de Andrade",
"L. C. Garcia",
""
]
] | The concept of acoustic metric introduced previously by Unruh (PRL-1981) is extended to include Cartan torsion by analogy with the scalar wave equation in Riemann-Cartan (RC) spacetime. This equation describes irrotational perturbations in rotational non-relativistic fluids. This physical motivation allows us to show t... |
1608.01963 | Jaclyn Sanders | J.R. Sanders and Stefan W. Ballmer | Folding Gravitational-Wave Interferometers | 6 pages, 2 figures | null | 10.1088/1361-6382/34/2/025003 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The sensitivity of kilometer-scale terrestrial gravitational wave
interferometers is limited by mirror coating thermal noise. We explore the
effect of folding the arm cavities of such interferometers. While simple
folding alone does not reduce the mirror coating thermal noise, it makes the
folding mirror the critical... | [
{
"created": "Fri, 5 Aug 2016 18:20:56 GMT",
"version": "v1"
}
] | 2017-01-04 | [
[
"Sanders",
"J. R.",
""
],
[
"Ballmer",
"Stefan W.",
""
]
] | The sensitivity of kilometer-scale terrestrial gravitational wave interferometers is limited by mirror coating thermal noise. We explore the effect of folding the arm cavities of such interferometers. While simple folding alone does not reduce the mirror coating thermal noise, it makes the folding mirror the critical m... |
2108.07302 | Che-Yu Chen | Mariam Bouhmadi-L\'opez, Che-Yu Chen, Xiao Yan Chew, Yen Chin Ong,
Dong-han Yeom | Traversable Wormhole in Einstein 3-Form Theory With Self-Interacting
Potential | 17 pages, 3 figures, reference added, updated to match the published
version | JCAP 10 (2021) 059 | 10.1088/1475-7516/2021/10/059 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We numerically construct a symmetric wormhole solution in pure Einstein
gravity supported by a massive $3$-form field with a potential that contains a
quartic self-interaction term. The wormhole spacetimes have only a single
throat and they are everywhere regular and asymptotically flat. Furthermore,
their mass and t... | [
{
"created": "Mon, 16 Aug 2021 18:11:03 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Oct 2021 15:21:34 GMT",
"version": "v2"
}
] | 2021-10-22 | [
[
"Bouhmadi-López",
"Mariam",
""
],
[
"Chen",
"Che-Yu",
""
],
[
"Chew",
"Xiao Yan",
""
],
[
"Ong",
"Yen Chin",
""
],
[
"Yeom",
"Dong-han",
""
]
] | We numerically construct a symmetric wormhole solution in pure Einstein gravity supported by a massive $3$-form field with a potential that contains a quartic self-interaction term. The wormhole spacetimes have only a single throat and they are everywhere regular and asymptotically flat. Furthermore, their mass and thr... |
gr-qc/0107052 | Abhik Kumar Sanyal | A.K.Sanyal and B.Modak | Is Noether Symmetric Approach Consistent With Dynamical Equation In
Non-minimal Scalar-Tensor Theories? | 7 pages, latex | Class.Quant.Grav.18:3767-3774,2001 | 10.1088/0264-9381/18/17/324 | null | gr-qc | null | The form of the coupling of the scalar field with gravity and the potential
have been found by applying Noether theorem to two dimensional minisuperspaces
in induced gravity model. It has been observed that though the forms thus
obtained are consistent with all the equations $\pounds_{X}L=0$, yet they do
not satisfy ... | [
{
"created": "Sat, 14 Jul 2001 08:57:41 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Sanyal",
"A. K.",
""
],
[
"Modak",
"B.",
""
]
] | The form of the coupling of the scalar field with gravity and the potential have been found by applying Noether theorem to two dimensional minisuperspaces in induced gravity model. It has been observed that though the forms thus obtained are consistent with all the equations $\pounds_{X}L=0$, yet they do not satisfy th... |
gr-qc/0406075 | Alex Calogeracos | Alex Calogeracos | Recalculation of the spectrum of radiation emitted during gravitational
collapse | to be published in Physics Letters A | Phys.Lett. A329 (2004) 1-7 | 10.1016/j.physleta.2004.06.045 | null | gr-qc | null | We recalculate the spectrum of radiation emitted from a collapsing star. We
consider the simple model of a spherical star consisting of pressure-free dust
and we derive the thermal spectrum via a systematic asymptotic expansion of the
complete Bogolubov amplitude. Inconsistencies in previous derivations are
pointed o... | [
{
"created": "Fri, 18 Jun 2004 16:56:27 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Calogeracos",
"Alex",
""
]
] | We recalculate the spectrum of radiation emitted from a collapsing star. We consider the simple model of a spherical star consisting of pressure-free dust and we derive the thermal spectrum via a systematic asymptotic expansion of the complete Bogolubov amplitude. Inconsistencies in previous derivations are pointed out... |
1707.02803 | Hans Ringstr\"om | Hans Ringstr\"om | Linear systems of wave equations on cosmological backgrounds with
convergent asymptotics | 419 pages | Ast\'erisque No. 420 (2020), 1-526 | null | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The subject of the article is linear systems of wave equations on
cosmological backgrounds with convergent asymptotics. The condition of
convergence corresponds to the requirement that the second fundamental form,
when suitably normalised, converges. The model examples are the Kasner
solutions. The main result of the... | [
{
"created": "Mon, 10 Jul 2017 11:33:36 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Aug 2018 12:06:53 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Jan 2021 07:59:58 GMT",
"version": "v3"
}
] | 2021-01-14 | [
[
"Ringström",
"Hans",
""
]
] | The subject of the article is linear systems of wave equations on cosmological backgrounds with convergent asymptotics. The condition of convergence corresponds to the requirement that the second fundamental form, when suitably normalised, converges. The model examples are the Kasner solutions. The main result of the a... |
2208.10235 | Valerio Faraoni | Shin'ichi Nojiri, Sergei D. Odintsov, Valerio Faraoni | New entropies, black holes, and holographic dark energy | 17 pages, latex, to appear in Astrophysics | null | 10.1007/s10511-023-09759-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Bekenstein-Hawking entropy is a cornerstone of horizon thermodynamics but
quantum effects correct it, while inequivalent entropies arise also in
non-extensive thermodynamics. Reviewing our previous work, we advocate for a
new entropy construct that comprises recent and older proposals and satisfies
four minimal k... | [
{
"created": "Mon, 22 Aug 2022 12:19:07 GMT",
"version": "v1"
}
] | 2023-01-25 | [
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Faraoni",
"Valerio",
""
]
] | The Bekenstein-Hawking entropy is a cornerstone of horizon thermodynamics but quantum effects correct it, while inequivalent entropies arise also in non-extensive thermodynamics. Reviewing our previous work, we advocate for a new entropy construct that comprises recent and older proposals and satisfies four minimal key... |
2101.11523 | Francisco Jos\'e Maldonado Torralba | Francisco Jos\'e Maldonado Torralba | New effective theories of gravitation and their phenomenological
consequences | PhD Thesis, University of Cape Town and University of Groningen.
Defended in November 2020. 172 pages, 8 figures, 1 table | null | 10.33612/diss.143961423 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This thesis focuses on modifications on Einstein's theory of General
Relativity, which could explain the current problems in gravitation and
cosmology. More specifically, modifications of the affine structure of the
spacetime, which is the structure that tells us how to perform derivatives, are
studied. These theorie... | [
{
"created": "Wed, 27 Jan 2021 16:25:14 GMT",
"version": "v1"
}
] | 2021-01-28 | [
[
"Torralba",
"Francisco José Maldonado",
""
]
] | This thesis focuses on modifications on Einstein's theory of General Relativity, which could explain the current problems in gravitation and cosmology. More specifically, modifications of the affine structure of the spacetime, which is the structure that tells us how to perform derivatives, are studied. These theories ... |
2301.12198 | Wonwoo Lee | Soyeon Jeong, Bum-Hoon Lee, Hocheol Lee, Wonwoo Lee | Homoclinic orbit and the violation of the chaos bound around a black
hole with anisotropic matter fields | 19 pages, 27 figures, references added, version to appear in PRD | Phys. Rev. D 107, 104037 2023 | 10.1103/PhysRevD.107.104037 | CQUeST-2023-0718 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the homoclinic orbit and the violation of chaos bound, which are
obtained by particle motions around a black hole that coexist with anisotropic
matter fields. The homoclinic one is associated with an unstable local maximum
of the effective potential. By perturbing a particle located slightly away from
the ho... | [
{
"created": "Sat, 28 Jan 2023 13:39:40 GMT",
"version": "v1"
},
{
"created": "Wed, 17 May 2023 08:21:16 GMT",
"version": "v2"
}
] | 2023-05-31 | [
[
"Jeong",
"Soyeon",
""
],
[
"Lee",
"Bum-Hoon",
""
],
[
"Lee",
"Hocheol",
""
],
[
"Lee",
"Wonwoo",
""
]
] | We study the homoclinic orbit and the violation of chaos bound, which are obtained by particle motions around a black hole that coexist with anisotropic matter fields. The homoclinic one is associated with an unstable local maximum of the effective potential. By perturbing a particle located slightly away from the homo... |
1210.0753 | Aharon Davidson | Aharon Davidson, Shimon Rubin and Yosef Verbin | Can an evolving Universe host a static event horizon? | 10 PRD pages, no figures; v.2: few typos corrected | Phys. Rev. D 86, 104061 (2012) | 10.1103/PhysRevD.86.104061 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove the existence of general relativistic perfect fluid black hole
solutions, and demonstrate the phenomenon for the $P=w\rho$ class of equations
of state. While admitting a local time-like Killing vector on the event horizon
itself, the various black hole configurations are necessarily time dependent
(thereby a... | [
{
"created": "Tue, 2 Oct 2012 12:42:34 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Nov 2012 14:21:33 GMT",
"version": "v2"
}
] | 2012-11-28 | [
[
"Davidson",
"Aharon",
""
],
[
"Rubin",
"Shimon",
""
],
[
"Verbin",
"Yosef",
""
]
] | We prove the existence of general relativistic perfect fluid black hole solutions, and demonstrate the phenomenon for the $P=w\rho$ class of equations of state. While admitting a local time-like Killing vector on the event horizon itself, the various black hole configurations are necessarily time dependent (thereby avo... |
2007.04672 | Recai Erdem | Recai Erdem and Betul Demirkaya | A metric for gravitational collapse of dust around a Schwarzschild black
hole | Major revisions in the abstract and the text | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the problem of gravitational collapse of a fluid under the effect
of a Schwarzschild black hole (e.g. a primordial one) that suddenly forms
inside the fluid. We assume the fluid initially be a uniform dust. Starting
from this configuration we obtain a class of metrics under some assumptions. We
find that ... | [
{
"created": "Thu, 9 Jul 2020 10:00:16 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Mar 2021 14:18:33 GMT",
"version": "v2"
}
] | 2021-03-25 | [
[
"Erdem",
"Recai",
""
],
[
"Demirkaya",
"Betul",
""
]
] | We consider the problem of gravitational collapse of a fluid under the effect of a Schwarzschild black hole (e.g. a primordial one) that suddenly forms inside the fluid. We assume the fluid initially be a uniform dust. Starting from this configuration we obtain a class of metrics under some assumptions. We find that th... |
1001.2285 | Fernando P. Devecchi | L.L. Samojeden, F.P. Devecchi, G.M. Kremer | Fermions in Brans-Dicke cosmology | 4 pages, 3 figures (separated from manuscript), to appear in PRD | Phys.Rev.D81:027301,2010 | 10.1103/PhysRevD.81.027301 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the Brans-Dicke theory of gravitation we put under investigation a
hypothetical universe filled with a fermionic field (with a self interaction
potential) and a matter constituent ruled by a barotropic equation of state. It
is shown that the fermionic field (in combination with the Brans-Dicke scalar
field) cou... | [
{
"created": "Wed, 13 Jan 2010 20:01:21 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Jan 2010 19:03:19 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Samojeden",
"L. L.",
""
],
[
"Devecchi",
"F. P.",
""
],
[
"Kremer",
"G. M.",
""
]
] | Using the Brans-Dicke theory of gravitation we put under investigation a hypothetical universe filled with a fermionic field (with a self interaction potential) and a matter constituent ruled by a barotropic equation of state. It is shown that the fermionic field (in combination with the Brans-Dicke scalar field) could... |
gr-qc/0702143 | Valerio Faraoni | Valerio Faraoni (Bishop's University) | No "big trips" for the universe | 8 pages, latex, to appear in Phys. Lett. B | Phys.Lett.B647:309-312,2007 | 10.1016/j.physletb.2007.02.048 | null | gr-qc | null | It has been claimed in several papers that a phantom energy-dominated
universe can undergo a ``big trip'', i.e., tunneling through a wormhole that
grows faster than the cosmic substratum due to the accretion of phantom energy,
and will reappear on the other mouth of the wormhole. We show that such claims
are unfounde... | [
{
"created": "Tue, 27 Feb 2007 14:31:55 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Faraoni",
"Valerio",
"",
"Bishop's University"
]
] | It has been claimed in several papers that a phantom energy-dominated universe can undergo a ``big trip'', i.e., tunneling through a wormhole that grows faster than the cosmic substratum due to the accretion of phantom energy, and will reappear on the other mouth of the wormhole. We show that such claims are unfounded ... |
2402.01136 | Olamide Odutola | Olamide Odutola, Arundhati Dasgupta | Gauss's Law and a Gravitational Wave | Accepted to Universe as a Communication | Universe. 2024; 10(2):65 | 10.3390/universe10020065 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We discuss the semi-classical gravitational wave corrections to Gauss's law,
and obtain an explicit solution for the electromagnetic potential. The
Gravitational Wave perturbs the Coulomb potential with a function which
propagates to the asymptotics.
| [
{
"created": "Fri, 2 Feb 2024 04:29:17 GMT",
"version": "v1"
}
] | 2024-02-05 | [
[
"Odutola",
"Olamide",
""
],
[
"Dasgupta",
"Arundhati",
""
]
] | We discuss the semi-classical gravitational wave corrections to Gauss's law, and obtain an explicit solution for the electromagnetic potential. The Gravitational Wave perturbs the Coulomb potential with a function which propagates to the asymptotics. |
2401.15211 | Adailton Ara\'ujo Filho | A. A. Ara\'ujo Filho, Kimet Jusufi, B. Cuadros-Melgar, Genly Leon,
Abdul Jawad, C.E. Pellicer | Charged Black Holes with Yukawa Potential | 19 pages in two column, 18 figures and 2 tables | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This study derives a novel family of charged black hole solutions featuring
short- and long-range modifications. These ones are achieved through a
Yukawa-like gravitational potential modification and a nonsingular electric
potential incorporation. The short-range corrections encode quantum gravity
effects, while the ... | [
{
"created": "Fri, 26 Jan 2024 21:21:00 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Mar 2024 00:03:14 GMT",
"version": "v2"
}
] | 2024-03-13 | [
[
"Filho",
"A. A. Araújo",
""
],
[
"Jusufi",
"Kimet",
""
],
[
"Cuadros-Melgar",
"B.",
""
],
[
"Leon",
"Genly",
""
],
[
"Jawad",
"Abdul",
""
],
[
"Pellicer",
"C. E.",
""
]
] | This study derives a novel family of charged black hole solutions featuring short- and long-range modifications. These ones are achieved through a Yukawa-like gravitational potential modification and a nonsingular electric potential incorporation. The short-range corrections encode quantum gravity effects, while the lo... |
2403.01846 | Mingzheng Li | Mingzheng Li, Jiming Yu, Zhen Pan | Improving the detection sensitivity to primordial stochastic
gravitational waves with reduced astrophysical foregrounds -- II:
subthreshold binary neutron stars | 11 pages, 5 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Stochastic gravitational waves (GWs) consist of a primordial component from
early Universe processes and an astrophysical component from compact binary
mergers. To detect the primordial stochastic GW background (SGWB), the
astrophysical foregrounds must be reduced to high precision, which is
achievable for third-gene... | [
{
"created": "Mon, 4 Mar 2024 08:54:03 GMT",
"version": "v1"
}
] | 2024-03-07 | [
[
"Li",
"Mingzheng",
""
],
[
"Yu",
"Jiming",
""
],
[
"Pan",
"Zhen",
""
]
] | Stochastic gravitational waves (GWs) consist of a primordial component from early Universe processes and an astrophysical component from compact binary mergers. To detect the primordial stochastic GW background (SGWB), the astrophysical foregrounds must be reduced to high precision, which is achievable for third-genera... |
1711.01398 | Apostolos Kuiroukidis | A. Kuiroukidis | A class of simple bouncing and late-time accelerating cosmologies in
f(R) gravity | 16 pages, 8 figures, LaTeX, submitted to IJMPD | International Journal of Modern Physics D Vol. 27 (2018) 1850055 | 10.1142/S0218271818500554 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the field equations for a flat FRW cosmological model, in a
generic $f(R)$ gravity model and cast them into a, completely
normalized-dimensionless, system of O.D.Es for the scale factor and the
function $f(R)$, with respect to the scalar curvature $R$. It is shown that
under reasonable assumptions one can... | [
{
"created": "Sat, 4 Nov 2017 05:55:17 GMT",
"version": "v1"
}
] | 2018-01-24 | [
[
"Kuiroukidis",
"A.",
""
]
] | We consider the field equations for a flat FRW cosmological model, in a generic $f(R)$ gravity model and cast them into a, completely normalized-dimensionless, system of O.D.Es for the scale factor and the function $f(R)$, with respect to the scalar curvature $R$. It is shown that under reasonable assumptions one can p... |
gr-qc/9508025 | R. Balasubramanian | R. Balasubramanian, B.S. Sathyaprakash and S.V. Dhurandhar | Estimation of parameters of gravitational waves from coalescing binaries | 5 pages, REVTEX, 2 figures (bundled via uufiles command along with
this paper) submitted to Pramana | Pramana 45 (1995) L463-L470 | 10.1007/BF02875180 | null | gr-qc | null | In this paper we deal with the measurement of the parameters of the
gravitational wave signal emitted by a coalescing binary signal.
We present the results of Monte Carlo simulations carried out for the case of
the initial LIGO, incorporating the first post-Newtonian corrections into the
waveform. Using the paramet... | [
{
"created": "Wed, 9 Aug 1995 08:48:41 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Balasubramanian",
"R.",
""
],
[
"Sathyaprakash",
"B. S.",
""
],
[
"Dhurandhar",
"S. V.",
""
]
] | In this paper we deal with the measurement of the parameters of the gravitational wave signal emitted by a coalescing binary signal. We present the results of Monte Carlo simulations carried out for the case of the initial LIGO, incorporating the first post-Newtonian corrections into the waveform. Using the parameters ... |
0904.0362 | Dirk Puetzfeld | Dirk Puetzfeld | The motion of test bodies with microstructure in gauge gravity models | 6 pages, uses Acta Phys. Pol. LaTeX style | Acta Phys.Polon.Supp.1:167-172,2008 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report on the explicit form of the equations of motion of pole-dipole
particles for a very large class of gravitational theories. The non-Riemannian
framework in which the equations are derived allows for a unified description
of nearly all known gravitational theories. The propagation equations are
obtained with ... | [
{
"created": "Thu, 2 Apr 2009 11:14:44 GMT",
"version": "v1"
}
] | 2010-01-18 | [
[
"Puetzfeld",
"Dirk",
""
]
] | We report on the explicit form of the equations of motion of pole-dipole particles for a very large class of gravitational theories. The non-Riemannian framework in which the equations are derived allows for a unified description of nearly all known gravitational theories. The propagation equations are obtained with th... |
1110.3462 | Chen Songbai | Songbai Chen, Jiliang Jing | Properties of a thin accretion disk around a rotating non-Kerr black
hole | 13 pages, 5 figures. References added, Expanded discussion of the
marginally stable orbit and its consequence. Accepted for publication in
Phys. Lett. B | Phys. Lett. B 711, 81-87 (2012) | 10.1016/j.physletb.2012.03.047 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the accretion process in the thin disk around a rotating non-Kerr
black hole with a deformed parameter and an unbound rotation parameter. Our
results show that the presence of the deformed parameter $\epsilon$ modifies
the standard properties of the disk. For the case in which the black hole is
more oblate t... | [
{
"created": "Sun, 16 Oct 2011 07:14:03 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Oct 2011 01:19:46 GMT",
"version": "v2"
},
{
"created": "Sat, 29 Oct 2011 04:25:52 GMT",
"version": "v3"
},
{
"created": "Mon, 19 Mar 2012 08:00:31 GMT",
"version": "v4"
}
] | 2015-05-30 | [
[
"Chen",
"Songbai",
""
],
[
"Jing",
"Jiliang",
""
]
] | We study the accretion process in the thin disk around a rotating non-Kerr black hole with a deformed parameter and an unbound rotation parameter. Our results show that the presence of the deformed parameter $\epsilon$ modifies the standard properties of the disk. For the case in which the black hole is more oblate tha... |
gr-qc/0111043 | Adrian Butscher | Adrian Butscher | Exploring the Conformal Constraint Equations | 22 pages. Will appear in the proceedings of the internationl workshop
on the conformal structure of spacetime (Tuebingen, Germany, April 2001).
This is the final version and is significantly different from Version 1 | Lect.Notes Phys. 604 (2002) 195-222 | null | null | gr-qc math.DG | null | One method of studying the asymptotic structure of spacetime is to apply
Penrose's conformal rescaling technique. In this setting, the Einstein
equations for the metric and the conformal factor in the unphysical spacetime
degenerate where the conformal factor vanishes, namely at the boundary
representing null infinit... | [
{
"created": "Wed, 14 Nov 2001 09:42:27 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Apr 2002 12:29:02 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Butscher",
"Adrian",
""
]
] | One method of studying the asymptotic structure of spacetime is to apply Penrose's conformal rescaling technique. In this setting, the Einstein equations for the metric and the conformal factor in the unphysical spacetime degenerate where the conformal factor vanishes, namely at the boundary representing null infinity.... |
1309.2161 | P. A. Gonzalez | P. A. Gonzalez, Eleftherios Papantonopoulos, Joel Saavedra and Yerko
Vasquez | Four-Dimensional Asymptotically AdS Black Holes with Scalar Hair | Version accepted for publication in JHEP | null | 10.1007/JHEP12(2013)021 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new family of asymptotically AdS four-dimensional black hole
solutions with scalar hair of a gravitating system consisting of a scalar field
minimally coupled to gravity with a self-interacting potential. For a certain
profile of the scalar field we solve the Einstein equations and we determine
the scala... | [
{
"created": "Mon, 9 Sep 2013 14:05:02 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Nov 2013 14:03:55 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Gonzalez",
"P. A.",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Saavedra",
"Joel",
""
],
[
"Vasquez",
"Yerko",
""
]
] | We present a new family of asymptotically AdS four-dimensional black hole solutions with scalar hair of a gravitating system consisting of a scalar field minimally coupled to gravity with a self-interacting potential. For a certain profile of the scalar field we solve the Einstein equations and we determine the scalar ... |
2007.08550 | Karan Jani | Karan Jani and Abraham Loeb | Gravitational-Wave Lunar Observatory for Cosmology | Published in the Journal of Cosmology and Astroparticle Physics (24
June 2021) | JCAP06(2021)044 | 10.1088/1475-7516/2021/06/044 | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | Several large-scale experimental facilities and space-missions are being
suggested to probe the universe across the gravitational-wave (GW) spectrum.
Here we propose Gravitational-wave Lunar Observatory for Cosmology (GLOC) - the
first concept design in the NASA Artemis era for a GW observatory on the Moon.
Using fea... | [
{
"created": "Thu, 16 Jul 2020 18:16:21 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Oct 2020 01:44:16 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Dec 2021 18:00:55 GMT",
"version": "v3"
}
] | 2021-12-24 | [
[
"Jani",
"Karan",
""
],
[
"Loeb",
"Abraham",
""
]
] | Several large-scale experimental facilities and space-missions are being suggested to probe the universe across the gravitational-wave (GW) spectrum. Here we propose Gravitational-wave Lunar Observatory for Cosmology (GLOC) - the first concept design in the NASA Artemis era for a GW observatory on the Moon. Using feasi... |
1512.07465 | Josep Llosa | Josep Llosa | An extension of Poincar\'e group abiding arbitrary acceleration | arXiv admin note: text overlap with arXiv:1507.01201 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The class of accelerated reference frames has been studied, on the basis of
Fermi-Walker coordinates. The infinitesimal transformations connecting two of
these frames has been obtained, and also their commutation relations. The
outcome is an infinite dimensional extension of the Poincar\'e algebra.
Although this exte... | [
{
"created": "Wed, 23 Dec 2015 13:35:45 GMT",
"version": "v1"
}
] | 2015-12-24 | [
[
"Llosa",
"Josep",
""
]
] | The class of accelerated reference frames has been studied, on the basis of Fermi-Walker coordinates. The infinitesimal transformations connecting two of these frames has been obtained, and also their commutation relations. The outcome is an infinite dimensional extension of the Poincar\'e algebra. Although this extens... |
1405.2543 | Oleg Zaslavskii | O. B. Zaslavskii | Innermost stable circular orbit near dirty black holes in magnetic field
and ultra-high energy particle collisions | 32 pages. Final version | Eur. Phys. J. C (2015) 75:403 | 10.1140/epjc/s10052-015-3623-2 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the behavior of the innermost stable circular orbit (ISCO) in the
magnetic field near "dirty" (surrounded by matter) axially-symmetric black
holes. The cases of near-extremal, extremal and nonextremal black holes are
analyzed. For nonrotating black holes, in the strong magnetic field ISCO
approaches the h... | [
{
"created": "Sun, 11 May 2014 15:52:30 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Aug 2014 23:45:16 GMT",
"version": "v2"
},
{
"created": "Sun, 6 Sep 2015 20:25:09 GMT",
"version": "v3"
}
] | 2015-09-08 | [
[
"Zaslavskii",
"O. B.",
""
]
] | We consider the behavior of the innermost stable circular orbit (ISCO) in the magnetic field near "dirty" (surrounded by matter) axially-symmetric black holes. The cases of near-extremal, extremal and nonextremal black holes are analyzed. For nonrotating black holes, in the strong magnetic field ISCO approaches the hor... |
2404.03141 | Siamak Akhshabi | Elham Arabahmadi and Siamak Akhshabi | The Role of Torsion in Trans-Planckian Physics | 21 pages, 6 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The torsion of spacetime, if exists, plays an important role at the very
early universe when the spin density of particles was very high. It is
generally believed that in extremely high energies of the early universe a new
physics called trans-Planckian physics should be considered. Since the initial
conditions for i... | [
{
"created": "Thu, 4 Apr 2024 01:26:50 GMT",
"version": "v1"
}
] | 2024-04-05 | [
[
"Arabahmadi",
"Elham",
""
],
[
"Akhshabi",
"Siamak",
""
]
] | The torsion of spacetime, if exists, plays an important role at the very early universe when the spin density of particles was very high. It is generally believed that in extremely high energies of the early universe a new physics called trans-Planckian physics should be considered. Since the initial conditions for inf... |
1505.03096 | Jos\'e Villanueva | J. R. Villanueva and Emanuel Gallo | A Jacobian elliptic single-field inflation | 7 pages, 5 figures | Eur. Phys. J. C (2015) 75: 256 | 10.1140/epjc/s10052-015-3464-z | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the scenario of single-field inflation, this field is done in terms of
Jacobian elliptic functions. This approach provides, when constrained to
particular cases, analytic solutions already known in the past, generalizing
them to a bigger family of analytical solutions. The emergent cosmology is
analysed using the ... | [
{
"created": "Tue, 12 May 2015 17:42:53 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jun 2015 14:35:14 GMT",
"version": "v2"
}
] | 2015-06-11 | [
[
"Villanueva",
"J. R.",
""
],
[
"Gallo",
"Emanuel",
""
]
] | In the scenario of single-field inflation, this field is done in terms of Jacobian elliptic functions. This approach provides, when constrained to particular cases, analytic solutions already known in the past, generalizing them to a bigger family of analytical solutions. The emergent cosmology is analysed using the Ha... |
0805.2227 | Mohammad Vahid Takook | M. Dehghani, S. Rouhani, M.V. Takook and M.R. Tanhayi | Conformally Invariant "Massless" Spin-2 Field in de Sitter Universe | 22 pages | Phys.Rev.D77:064028,2008 | 10.1103/PhysRevD.77.064028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | ''Massless'' spin-2 field equation in de Sitter space, which is invariant
under the conformal transformation, has been obtained. The frame work utilized
is the symmetric rank-2 tensor field of the conformal group. Our method is
based on the group theoretical approach and six-cone formalism, initially
introduced by Di... | [
{
"created": "Thu, 15 May 2008 08:12:58 GMT",
"version": "v1"
}
] | 2014-06-18 | [
[
"Dehghani",
"M.",
""
],
[
"Rouhani",
"S.",
""
],
[
"Takook",
"M. V.",
""
],
[
"Tanhayi",
"M. R.",
""
]
] | ''Massless'' spin-2 field equation in de Sitter space, which is invariant under the conformal transformation, has been obtained. The frame work utilized is the symmetric rank-2 tensor field of the conformal group. Our method is based on the group theoretical approach and six-cone formalism, initially introduced by Dira... |
gr-qc/0409033 | Marco Alberici | Marco Alberici | Clock rate comparison in a uniform gravitational field | 11 pages, 4 figures, RevTeX4. Few equation were corrected, and the
pictures were more properly redrawn. A new paper of the same author "Measures
and metrics in uniform gravitational fields" gr-qc/0503092, contains all the
results and the proofs presented in this paper, but also new material | null | null | null | gr-qc physics.ed-ph | null | A partially alternative derivation of the expression for the time dilation
effect in a uniform static gravitational field is obtained by means of a
thought experiment in which rates of clocks at rest at different heights are
compared using as reference a clock bound to a free falling reference system
(FFRS). Derivati... | [
{
"created": "Tue, 7 Sep 2004 16:56:01 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Nov 2004 16:15:05 GMT",
"version": "v2"
},
{
"created": "Wed, 18 May 2005 14:04:55 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Alberici",
"Marco",
""
]
] | A partially alternative derivation of the expression for the time dilation effect in a uniform static gravitational field is obtained by means of a thought experiment in which rates of clocks at rest at different heights are compared using as reference a clock bound to a free falling reference system (FFRS). Derivation... |
2102.09946 | Vinod Bhardwaj Dr. | Vinod Kumar Bhardwaj, Archana Dixit and Anirudh Pradhan | Statefinder hierarchy model for the Barrow holographic dark energy | 17 pages, 16 figures | New Astronomy, Vol 88, October (2021) 101623(9 pages) | 10.1016/j.newast.2021.101623 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have used the state finder hierarchy for Barrow holographic
dark energy (BHDE) model in the system of the FLRW Universe. We apply two DE
diagnostic tools to determine $\Lambda BHDE$ model to have various estimations
of $\triangle$. The first diagnostic tool is the state finder hierarchy in
which we ... | [
{
"created": "Fri, 19 Feb 2021 14:15:40 GMT",
"version": "v1"
}
] | 2021-08-02 | [
[
"Bhardwaj",
"Vinod Kumar",
""
],
[
"Dixit",
"Archana",
""
],
[
"Pradhan",
"Anirudh",
""
]
] | In this paper, we have used the state finder hierarchy for Barrow holographic dark energy (BHDE) model in the system of the FLRW Universe. We apply two DE diagnostic tools to determine $\Lambda BHDE$ model to have various estimations of $\triangle$. The first diagnostic tool is the state finder hierarchy in which we ha... |
2206.14228 | Rodrigo Gonzalez Quaglia | R.Gonzalez Quaglia, Gabriel German | A comparison between the Jordan and Einstein Frames in Brans-Dicke
theories with torsion | 25 pages, references added and improved manuscript. Accepted for
publication in EPJP | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In recent years, gravitational models motivated by quantum corrections to
gravity which introduce higher order terms like $R^{2}$ or terms in which the
Riemann tensor is not symmetric have been studied by several authors in the
form of a general Brans-Dicke type model containing the Ricci scalar, the Holst
term and t... | [
{
"created": "Tue, 28 Jun 2022 18:29:01 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Aug 2022 18:29:31 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Mar 2023 02:25:52 GMT",
"version": "v3"
}
] | 2023-03-03 | [
[
"Quaglia",
"R. Gonzalez",
""
],
[
"German",
"Gabriel",
""
]
] | In recent years, gravitational models motivated by quantum corrections to gravity which introduce higher order terms like $R^{2}$ or terms in which the Riemann tensor is not symmetric have been studied by several authors in the form of a general Brans-Dicke type model containing the Ricci scalar, the Holst term and the... |
gr-qc/9506012 | null | Giampiero Esposito, Cosimo Stornaiolo | Boundary Terms in Complex General Relativity | 12 pages, plain Tex, no figures, accepted for publication in
Classical and Quantum Gravity | Class.Quant.Grav.12:1733-1738,1995 | 10.1088/0264-9381/12/7/015 | DSF preprint 95/25 | gr-qc | null | A recent analysis of real general relativity based on multisymplectic
techniques has shown that boundary terms may occur in the constraint equations,
unless some boundary conditions are imposed. This paper studies the
corresponding form of such boundary terms in complex general relativity, where
space-time is a four-... | [
{
"created": "Tue, 6 Jun 1995 09:22:13 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Esposito",
"Giampiero",
""
],
[
"Stornaiolo",
"Cosimo",
""
]
] | A recent analysis of real general relativity based on multisymplectic techniques has shown that boundary terms may occur in the constraint equations, unless some boundary conditions are imposed. This paper studies the corresponding form of such boundary terms in complex general relativity, where space-time is a four-co... |
2003.00093 | Melanie Graf | Gregory J. Galloway, Melanie Graf, Eric Ling | A conformal infinity approach to asymptotically $\text{AdS}_2\times
S^{n-1}$ spacetimes | 24 pages | null | 10.1007/s00023-020-00958-6 | null | gr-qc hep-th math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that the spacetime $\text{AdS}_2\times S^2$ arises as the
`near horizon' geometry of the extremal Reisser-Nordstrom solution, and for
that reason it has been studied in connection with the AdS/CFT correspondence.
Motivated by a conjectural viewpoint of Juan Maldacena, the authors in [4]
studied the r... | [
{
"created": "Fri, 28 Feb 2020 22:15:57 GMT",
"version": "v1"
}
] | 2020-12-02 | [
[
"Galloway",
"Gregory J.",
""
],
[
"Graf",
"Melanie",
""
],
[
"Ling",
"Eric",
""
]
] | It is well known that the spacetime $\text{AdS}_2\times S^2$ arises as the `near horizon' geometry of the extremal Reisser-Nordstrom solution, and for that reason it has been studied in connection with the AdS/CFT correspondence. Motivated by a conjectural viewpoint of Juan Maldacena, the authors in [4] studied the rig... |
0805.1162 | Tao Zhu | Tao Zhu, Ji-Rong Ren, Shu-Fan Mo | Thermodynamics of Friedmann Equation and Masslike Function in General
Braneworld | 14 pages, revtex form, no figure, english writing improved and some
discussions expanded. Accepted for publication in Int.J.Mod.Phys.A | Int.J.Mod.Phys.A24:5877-5888,2009 | 10.1142/S0217751X09046357 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the generalized procedure proposed by \emph{Wu et al}\cite{wu}
recently, we construct the first law of thermodynamics on apparent horizon in a
general braneworld model with curvature correction terms on the brane and in
the bulk, respectively. The explicit entropy formulary of apparent horizon in
the general br... | [
{
"created": "Thu, 8 May 2008 13:28:32 GMT",
"version": "v1"
},
{
"created": "Mon, 12 May 2008 06:25:25 GMT",
"version": "v2"
},
{
"created": "Sun, 13 Jul 2008 13:20:57 GMT",
"version": "v3"
},
{
"created": "Fri, 8 Aug 2008 05:00:23 GMT",
"version": "v4"
},
{
"cre... | 2010-01-07 | [
[
"Zhu",
"Tao",
""
],
[
"Ren",
"Ji-Rong",
""
],
[
"Mo",
"Shu-Fan",
""
]
] | Using the generalized procedure proposed by \emph{Wu et al}\cite{wu} recently, we construct the first law of thermodynamics on apparent horizon in a general braneworld model with curvature correction terms on the brane and in the bulk, respectively. The explicit entropy formulary of apparent horizon in the general bran... |
gr-qc/0409093 | Larry Ford | L.H. Ford and Thomas A. Roman | Energy Flux Correlations and Moving Mirrors | 18 pages, 6 figures | Phys.Rev. D70 (2004) 125008 | 10.1103/PhysRevD.70.125008 | null | gr-qc hep-th quant-ph | null | We study the quantum stress tensor correlation function for a massless scalar
field in a flat two-dimensional spacetime containing a moving mirror. We
construct the correlation functions for right-moving and left-moving fluxes for
an arbitrary trajectory, and then specialize them to the case of a mirror
trajectory fo... | [
{
"created": "Fri, 24 Sep 2004 19:17:07 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Ford",
"L. H.",
""
],
[
"Roman",
"Thomas A.",
""
]
] | We study the quantum stress tensor correlation function for a massless scalar field in a flat two-dimensional spacetime containing a moving mirror. We construct the correlation functions for right-moving and left-moving fluxes for an arbitrary trajectory, and then specialize them to the case of a mirror trajectory for ... |
gr-qc/0005117 | Yongge Ma | Yongge Ma and Yi Ling | $\hat{Q}$ operator for canonical quantum gravity | 10 pages, minor modefication, reference updated | Phys.Rev. D62 (2000) 104021 | 10.1103/PhysRevD.62.104021 | null | gr-qc hep-th math-ph math.MP quant-ph | null | We study the properties of $\hat{Q}[\omega]$ operator on the kinematical
Hilbert space ${\cal H}$ for canonical quantum gravity. Its complete spectrum
with respect to the spin network basis is obtained. It turns out that
$\hat{Q}[\omega]$ is diagonalized in this basis, and it is a well defined
self-adjoint operator o... | [
{
"created": "Thu, 25 May 2000 21:27:30 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Oct 2000 17:23:14 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Ma",
"Yongge",
""
],
[
"Ling",
"Yi",
""
]
] | We study the properties of $\hat{Q}[\omega]$ operator on the kinematical Hilbert space ${\cal H}$ for canonical quantum gravity. Its complete spectrum with respect to the spin network basis is obtained. It turns out that $\hat{Q}[\omega]$ is diagonalized in this basis, and it is a well defined self-adjoint operator on ... |
0902.4346 | Emilio Santos Corchero | Emilio Santos | Dark energy and quantum vacuum fluctuations | 9 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is suggested that the vacuum expectation of the quantum vacuum
energy-momentum is zero, but quantum fluctuations give rise to a space-time
curvature equivalent to that of a cosmological constant or dark energy.
Calculations within quantized gravity, following a few plausible hypotheses,
provide results compatible ... | [
{
"created": "Wed, 25 Feb 2009 11:27:27 GMT",
"version": "v1"
}
] | 2009-02-26 | [
[
"Santos",
"Emilio",
""
]
] | It is suggested that the vacuum expectation of the quantum vacuum energy-momentum is zero, but quantum fluctuations give rise to a space-time curvature equivalent to that of a cosmological constant or dark energy. Calculations within quantized gravity, following a few plausible hypotheses, provide results compatible wi... |
1010.1516 | Stephane Collion | Michel Vaugon, Benoit Vaugon, Stephane Collion, Marie Dellinger, Zo\'e
Faget | A mathematicians' view of geometrical unification of classical physics
in high-dimensional space-time | Extended english version. Correction and improvement of introduction
to more than 5-dimensional space-time, with emphasis on this aspect | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose in this paper a mathematicians' view of the Kaluza-Klein idea of a
five dimensional space-time unifying gravitation and electromagnetism, and
extension to higher-dimensional space-time. By considering the classification
of positive Einstein curvature tensors and the classical Cauchy-Choquet-Bruhat
theorems... | [
{
"created": "Tue, 5 Oct 2010 14:48:03 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Dec 2010 18:25:59 GMT",
"version": "v2"
},
{
"created": "Mon, 3 Dec 2012 10:45:14 GMT",
"version": "v3"
},
{
"created": "Wed, 6 Feb 2013 14:41:15 GMT",
"version": "v4"
},
{
"crea... | 2013-04-23 | [
[
"Vaugon",
"Michel",
""
],
[
"Vaugon",
"Benoit",
""
],
[
"Collion",
"Stephane",
""
],
[
"Dellinger",
"Marie",
""
],
[
"Faget",
"Zoé",
""
]
] | We propose in this paper a mathematicians' view of the Kaluza-Klein idea of a five dimensional space-time unifying gravitation and electromagnetism, and extension to higher-dimensional space-time. By considering the classification of positive Einstein curvature tensors and the classical Cauchy-Choquet-Bruhat theorems i... |
2203.17137 | Per Berglund | Per Berglund, Tristan H\"ubsch, David Mattingly, Djordje Minic | Gravitizing the Quantum | 10 pages, Essay written for the Gravity Research Foundation 2022
Awards for Essays on Gravitation | int. J. Mod. Phys. D31 (2022) 2242024 (9 pages) | 10.1142/S021827182242024X | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a new approach to the problem of quantum gravity in which the
quantum mechanical structures that are traditionally fixed, such as the
Fubini-Study metric in the Hilbert space of states, become dynamical and so
implement the idea of gravitizing the quantum. In particular, in this
formulation of quantum grav... | [
{
"created": "Thu, 31 Mar 2022 16:00:56 GMT",
"version": "v1"
}
] | 2022-11-28 | [
[
"Berglund",
"Per",
""
],
[
"Hübsch",
"Tristan",
""
],
[
"Mattingly",
"David",
""
],
[
"Minic",
"Djordje",
""
]
] | We discuss a new approach to the problem of quantum gravity in which the quantum mechanical structures that are traditionally fixed, such as the Fubini-Study metric in the Hilbert space of states, become dynamical and so implement the idea of gravitizing the quantum. In particular, in this formulation of quantum gravit... |
gr-qc/9209012 | John D. Brown | J. David Brown and James W. York | Quasilocal Energy and Conserved Charges Derived from the Gravitational
Action | 35 pages, plain TeX. Two figures available upon request
(jdbrown@math.ncsu.edu) | Phys.Rev.D47:1407-1419,1993 | 10.1103/PhysRevD.47.1407 | null | gr-qc hep-th | null | The quasilocal energy of gravitational and matter fields in a spatially
bounded region is obtained by employing a Hamilton-Jacobi analysis of the
action functional. First, a surface stress-energy-momentum tensor is defined by
the functional derivative of the action with respect to the three-metric on
${}^3B$, the his... | [
{
"created": "Tue, 29 Sep 1992 19:01:12 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Brown",
"J. David",
""
],
[
"York",
"James W.",
""
]
] | The quasilocal energy of gravitational and matter fields in a spatially bounded region is obtained by employing a Hamilton-Jacobi analysis of the action functional. First, a surface stress-energy-momentum tensor is defined by the functional derivative of the action with respect to the three-metric on ${}^3B$, the histo... |
2305.04818 | Aristotelis Panagiotopoulos | Aristotelis Panagiotopoulos, George Sparling, Marios Christodoulou | Incompleteness Theorems for Observables in General Relativity | 5 pages, 2 figures | Physical Review Letters, Vol. 131, No. 17, p. 171402 (23 October,
2023) | 10.1103/PhysRevLett.131.171402 | null | gr-qc math-ph math.LO math.MP quant-ph | http://creativecommons.org/licenses/by/4.0/ | The quest for complete observables in general relativity has been a
longstanding open problem. We employ methods from descriptive set theory to
show that no complete observable on rich enough collections of spacetimes is
Borel definable. In fact, we show that it is consistent with the
Zermelo-Fraenkel and Dependent C... | [
{
"created": "Mon, 8 May 2023 16:18:11 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Sep 2023 21:34:08 GMT",
"version": "v2"
}
] | 2023-10-24 | [
[
"Panagiotopoulos",
"Aristotelis",
""
],
[
"Sparling",
"George",
""
],
[
"Christodoulou",
"Marios",
""
]
] | The quest for complete observables in general relativity has been a longstanding open problem. We employ methods from descriptive set theory to show that no complete observable on rich enough collections of spacetimes is Borel definable. In fact, we show that it is consistent with the Zermelo-Fraenkel and Dependent Cho... |
gr-qc/0610132 | Nikodem Poplawski | Nikodem J. Poplawski | On the nonsymmetric purely affine gravity | 15 pages; published version | Mod.Phys.Lett.A22 (2007) 2701-2720 | 10.1142/S0217732307025662 | null | gr-qc math-ph math.MP | null | We review the vacuum purely affine gravity with the nonsymmetric connection
and metric. We also examine dynamical effects of the second Ricci tensor and
covariant second-rank tensors constructed from the torsion tensor in the
gravitational Lagrangian.
| [
{
"created": "Fri, 27 Oct 2006 19:13:35 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Jan 2007 07:12:45 GMT",
"version": "v2"
},
{
"created": "Sun, 18 Nov 2007 02:30:00 GMT",
"version": "v3"
}
] | 2009-04-04 | [
[
"Poplawski",
"Nikodem J.",
""
]
] | We review the vacuum purely affine gravity with the nonsymmetric connection and metric. We also examine dynamical effects of the second Ricci tensor and covariant second-rank tensors constructed from the torsion tensor in the gravitational Lagrangian. |
1511.03480 | Saheb Soroushfar | Negin Kamvar, Reza Saffari, and Saheb Soroushfar | Thermodynamics of rotating black holes in conformal gravity | Introduction is revised | JHAP (Journal of Holography Applications in Physics) 4 (2024) 1071 | 10.22128/JHAP.2024.794.1071 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider a metric of a rotating black hole in conformal
gravity. We calculate the thermodynamical quantities for this rotating black
hole including Hawking temperature and entropy in four dimensional space-time,
as we obtain the effective value of Komar angular momentum. The result is valid
on the ev... | [
{
"created": "Wed, 11 Nov 2015 12:47:44 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Nov 2015 13:24:40 GMT",
"version": "v2"
}
] | 2024-04-23 | [
[
"Kamvar",
"Negin",
""
],
[
"Saffari",
"Reza",
""
],
[
"Soroushfar",
"Saheb",
""
]
] | In this paper we consider a metric of a rotating black hole in conformal gravity. We calculate the thermodynamical quantities for this rotating black hole including Hawking temperature and entropy in four dimensional space-time, as we obtain the effective value of Komar angular momentum. The result is valid on the even... |
gr-qc/0401029 | Ragab Gad | Ragab M. Gad and M. M. Hassan (Minia University) | On The Geometrical and Physical Properties of Spherically Symmetric
Non-Static Space-Times: Self-Similarity | 6 pages, Latex, no-figures, To appear in Il Nuovo Cimento B | IL Nuovo Cimento 118 B, 759-765 (2003) | 10.1393/ncb/i2003-10055-x | null | gr-qc | null | An exact solution of the Einstein field equations is found under the
assumption of spherically symmetry and the existence of one-parameter group of
homothetic motions. This solution has a singularity at $r = 0$, and has
non-vanishing expansion, acceleration and shear. Tidal forces in radial
direction will not stretch... | [
{
"created": "Thu, 8 Jan 2004 22:34:07 GMT",
"version": "v1"
}
] | 2018-03-23 | [
[
"Gad",
"Ragab M.",
"",
"Minia University"
],
[
"Hassan",
"M. M.",
"",
"Minia University"
]
] | An exact solution of the Einstein field equations is found under the assumption of spherically symmetry and the existence of one-parameter group of homothetic motions. This solution has a singularity at $r = 0$, and has non-vanishing expansion, acceleration and shear. Tidal forces in radial direction will not stretch a... |
1808.06483 | Phongpichit Channuie | Phongpichit Channuie (Walailak U.), Davood Momeni, Mudhahir Al Ajmi
(Sultan Qaboos U.) | On Nash theory of gravity with matter contents | v5: 23 pages, many figures, title changed, texts modified reflecting
referee's suggestions, main results unchanged, version accepted for
publication in Inter. J. Modern Physics A | International Journal of Modern Physics A Vol. 36 (2021) 02,
2150006 | 10.1142/S0217751X21500068 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Although it was proved that the Nash theory doesn't have classical Einstein
limits, it has been proven to be formally divergent free and considered to be
of interest in constructing theories of quantum gravity. The original Nash
gravity without matter contents can't explain the current accelerated expansion
of the Un... | [
{
"created": "Thu, 16 Aug 2018 11:07:53 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Sep 2018 07:07:13 GMT",
"version": "v2"
},
{
"created": "Tue, 22 Jan 2019 07:04:12 GMT",
"version": "v3"
},
{
"created": "Mon, 20 Apr 2020 01:12:38 GMT",
"version": "v4"
},
{
"c... | 2021-02-09 | [
[
"Channuie",
"Phongpichit",
"",
"Walailak U."
],
[
"Momeni",
"Davood",
"",
"Sultan Qaboos U."
],
[
"Ajmi",
"Mudhahir Al",
"",
"Sultan Qaboos U."
]
] | Although it was proved that the Nash theory doesn't have classical Einstein limits, it has been proven to be formally divergent free and considered to be of interest in constructing theories of quantum gravity. The original Nash gravity without matter contents can't explain the current accelerated expansion of the Univ... |
2206.07818 | Shahram Jalalzadeh | S. Jalalzadeh, E.W. Oliveira Costa and P.V. Moniz | de Sitter Fractional Quantum Cosmology | 7 pages, 1 figure, to appear in Phys. Rev. D | Phys. Rev. D 105, L121901 (2022) | 10.1103/PhysRevD.105.L121901 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We employ Riesz's fractional derivative into the Wheeler--DeWitt equation for
a closed de Sitter geometry and obtain the no-boundary and tunneling
wavefunctions. From the corresponding probability distributions, the event
horizon of the nucleated universe can be a fractal surface with dimensions
between $2\leq D<3$. ... | [
{
"created": "Wed, 15 Jun 2022 21:09:52 GMT",
"version": "v1"
}
] | 2022-07-05 | [
[
"Jalalzadeh",
"S.",
""
],
[
"Costa",
"E. W. Oliveira",
""
],
[
"Moniz",
"P. V.",
""
]
] | We employ Riesz's fractional derivative into the Wheeler--DeWitt equation for a closed de Sitter geometry and obtain the no-boundary and tunneling wavefunctions. From the corresponding probability distributions, the event horizon of the nucleated universe can be a fractal surface with dimensions between $2\leq D<3$. Co... |
1712.06202 | Filip Ficek | Filip Ficek, Patryk Mach | Planar domain walls in black hole spacetimes | 13 pages, 8 figures | Phys. Rev. D 97, 044012 (2018) | 10.1103/PhysRevD.97.044012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the behaviour of low-mass, planar domain walls in the
so-called $\phi^4$ model of the scalar field on the Schwarzschild and Kerr
backgrounds. We focus on a transit of a domain wall through a black hole and
solve numerically the equations of motion for a range of parameters of the
domain wall and the bl... | [
{
"created": "Sun, 17 Dec 2017 23:00:04 GMT",
"version": "v1"
}
] | 2018-02-14 | [
[
"Ficek",
"Filip",
""
],
[
"Mach",
"Patryk",
""
]
] | We investigate the behaviour of low-mass, planar domain walls in the so-called $\phi^4$ model of the scalar field on the Schwarzschild and Kerr backgrounds. We focus on a transit of a domain wall through a black hole and solve numerically the equations of motion for a range of parameters of the domain wall and the blac... |
1206.5136 | Jacek Jezierski | Jacek Jezierski and Bartek Kami\'nski | Towards uniqueness of degenerate axially symmetric Killing horizon | 17 pages | General Relativity and Gravitation May 2013, Volume 45, Issue 5,
pp 987-1004, | 10.1007/s10714-013-1506-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the linearized equations around extremal Kerr horizon and give
some arguments towards stability of the horizon with respect to generic
(non-symmetric) linear perturbation of near horizon geometry.
| [
{
"created": "Fri, 22 Jun 2012 13:00:52 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Aug 2014 07:58:10 GMT",
"version": "v2"
}
] | 2014-09-02 | [
[
"Jezierski",
"Jacek",
""
],
[
"Kamiński",
"Bartek",
""
]
] | We examine the linearized equations around extremal Kerr horizon and give some arguments towards stability of the horizon with respect to generic (non-symmetric) linear perturbation of near horizon geometry. |
2005.06427 | T. P. Singh | Tejinder P. Singh | Nature does not play dice at the Planck scale | v2: 8 pages; Typo corrected, Honourable mention, GRF essay contest
2020. Accepted for publication in Int. J. Mod. Phys. D | International Journal of Modern Physics 29 (2020) 2043012 | 10.1142/S0218271820430129 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We start from classical general relativity coupled to matter fields. Each
configuration variable and its conjugate momentum, as also space-time points,
are raised to the status of matrices [equivalently operators]. These matrices
obey a deterministic Lagrangian dynamics at the Planck scale. By
coarse-graining this ma... | [
{
"created": "Wed, 13 May 2020 16:58:53 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jul 2020 07:13:34 GMT",
"version": "v2"
}
] | 2020-11-09 | [
[
"Singh",
"Tejinder P.",
""
]
] | We start from classical general relativity coupled to matter fields. Each configuration variable and its conjugate momentum, as also space-time points, are raised to the status of matrices [equivalently operators]. These matrices obey a deterministic Lagrangian dynamics at the Planck scale. By coarse-graining this matr... |
gr-qc/0005068 | Alicia M. Sintes | J. Carot, L. Mas, A.M. Sintes | Space-times admitting a three-parameter similarity group | Latex 17 pages. Error corrected in Class. Quant. Grav.
14(1997)1183-1205, gr-qc/9607061 | J.Math.Phys. 35 (1994) 3560-3570 | 10.1063/1.530429 | null | gr-qc | null | Spacetimes admitting a similarity group are considered. Amongst them, special
attention is given to the 3-parameter ones. A classification of such spacetimes
is given based on the Bianchi type of the similarity group $H_3$, and the
general form of the metric is provided in each case assuming the orbits are
non-null.
| [
{
"created": "Tue, 16 May 2000 15:32:39 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Carot",
"J.",
""
],
[
"Mas",
"L.",
""
],
[
"Sintes",
"A. M.",
""
]
] | Spacetimes admitting a similarity group are considered. Amongst them, special attention is given to the 3-parameter ones. A classification of such spacetimes is given based on the Bianchi type of the similarity group $H_3$, and the general form of the metric is provided in each case assuming the orbits are non-null. |
1912.07276 | Gaurav Narain | Gaurav Narain and Hai-Qing Zhang | Lorentzian quantum cosmology with $R^2$ correction | 1+24 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum mechanical transition amplitudes directly tells the probability of
each transition and which one is more favourable. Path-integrals offers a
systematic methodology to compute this quantum mechanical process in a
consistent manner. Although it is not complicated in simple quantum mechanical
system but defining... | [
{
"created": "Mon, 16 Dec 2019 10:13:11 GMT",
"version": "v1"
}
] | 2019-12-17 | [
[
"Narain",
"Gaurav",
""
],
[
"Zhang",
"Hai-Qing",
""
]
] | Quantum mechanical transition amplitudes directly tells the probability of each transition and which one is more favourable. Path-integrals offers a systematic methodology to compute this quantum mechanical process in a consistent manner. Although it is not complicated in simple quantum mechanical system but defining p... |
gr-qc/0701031 | Enrico Rodrigo | Enrico Rodrigo | Higher-Dimensional Bulk Wormholes and their Manifestations in Brane
Worlds | 21 pages, 1 figure | Phys.Rev. D74 (2006) 104025 | 10.1103/PhysRevD.74.104025 | null | gr-qc | null | There is nothing to prevent a higher-dimensional anti-de Sitter bulk
spacetime from containing various other branes in addition to hosting our
universe, presumed to be a positive-tension 3-brane. In particular, it could
contain closed, microscopic branes that form the boundary surfaces of void
bubbles and thus violat... | [
{
"created": "Thu, 4 Jan 2007 03:32:18 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Rodrigo",
"Enrico",
""
]
] | There is nothing to prevent a higher-dimensional anti-de Sitter bulk spacetime from containing various other branes in addition to hosting our universe, presumed to be a positive-tension 3-brane. In particular, it could contain closed, microscopic branes that form the boundary surfaces of void bubbles and thus violate ... |
gr-qc/9607053 | 3 | Donald E. Neville | Closed-Flux Solutions to the Constraints for Plane Gravity Waves | 18 pages; LaTex | Phys.Rev.D55:2069-2075,1997 | 10.1103/PhysRevD.55.2069 | TU-3-7-96 | gr-qc | null | The metric for plane gravitational waves is quantized within the Hamiltonian
framework, using a Dirac constraint quantization and the self-dual field
variables proposed by Ashtekar. The z axis (direction of travel of the waves)
is taken to be the entire real line rather than the torus (manifold
coordinatized by (z,t)... | [
{
"created": "Tue, 23 Jul 1996 15:51:08 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Neville",
"Donald E.",
""
]
] | The metric for plane gravitational waves is quantized within the Hamiltonian framework, using a Dirac constraint quantization and the self-dual field variables proposed by Ashtekar. The z axis (direction of travel of the waves) is taken to be the entire real line rather than the torus (manifold coordinatized by (z,t) i... |
2112.06608 | Dixeena Lopez | Dixeena Lopez, V. Gayathri, Archana Pai, Ik Siong Heng, Chris
Messenger and Sagar Kumar Gupta | Utilizing Gaussian mixture models in all-sky searches for short-duration
gravitational wave bursts | null | Phys. Rev. D 105, 063024 (2022) | 10.1103/PhysRevD.105.063024 | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | Coherent WaveBurst is a generic, multidetector gravitational wave burst
search based on the excess power approach. The coherent WaveBurst algorithm
currently employed in the all-sky short-duration gravitational wave burst
search uses a conditional approach on selected attributes in the
multidimensional event attribut... | [
{
"created": "Mon, 13 Dec 2021 12:43:03 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Apr 2022 19:40:00 GMT",
"version": "v2"
}
] | 2022-04-12 | [
[
"Lopez",
"Dixeena",
""
],
[
"Gayathri",
"V.",
""
],
[
"Pai",
"Archana",
""
],
[
"Heng",
"Ik Siong",
""
],
[
"Messenger",
"Chris",
""
],
[
"Gupta",
"Sagar Kumar",
""
]
] | Coherent WaveBurst is a generic, multidetector gravitational wave burst search based on the excess power approach. The coherent WaveBurst algorithm currently employed in the all-sky short-duration gravitational wave burst search uses a conditional approach on selected attributes in the multidimensional event attribute ... |
gr-qc/0405110 | Yury F. Pirogov | Yu. F. Pirogov | Gravity as the affine Goldstone phenomenon and beyond | 20 pages, style corrected | Phys.Atom.Nucl. 68 (2005) 1904; Yad.Fiz. 68 (2005) 1966 | 10.1134/1.2131118 | IHEP 2004-20 | gr-qc astro-ph hep-ph | null | The two-phase structure is imposed on the world continuum, with the graviton
emerging as the tensor Goldstone boson during the spontaneous transition from
the affinely connected phase to the metric one. The physics principle of
metarelativity, extending the respective principle of special relativity, is
postulated. T... | [
{
"created": "Thu, 20 May 2004 00:29:45 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Aug 2005 15:25:50 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Pirogov",
"Yu. F.",
""
]
] | The two-phase structure is imposed on the world continuum, with the graviton emerging as the tensor Goldstone boson during the spontaneous transition from the affinely connected phase to the metric one. The physics principle of metarelativity, extending the respective principle of special relativity, is postulated. The... |
0912.5180 | A. I. Nikishov | A.I. Nikishov | On the role of pressure in generating the gravitational field | 2 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein equations for static gravitational field depend on energy
density and pressure. So one may expect that solutions should depend on two
parameters: mass and its analogue originated from pressure. Yet the
Schwarzschild solution have only mass parameter. So does its linear
approximation. On the other hand th... | [
{
"created": "Mon, 28 Dec 2009 15:10:10 GMT",
"version": "v1"
}
] | 2009-12-31 | [
[
"Nikishov",
"A. I.",
""
]
] | The Einstein equations for static gravitational field depend on energy density and pressure. So one may expect that solutions should depend on two parameters: mass and its analogue originated from pressure. Yet the Schwarzschild solution have only mass parameter. So does its linear approximation. On the other hand the ... |
2205.07577 | Pantelis Pnigouras | Pantelis Pnigouras, Fabian Gittins, Amlan Nanda, Nils Andersson, David
Ian Jones | Rotating Love: The dynamical tides of spinning Newtonian stars | 19 pages, 1 figure | null | 10.1093/mnras/stad3593 | null | gr-qc astro-ph.HE astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We carefully develop the framework required to model the dynamical tidal
response of a spinning neutron star in an inspiralling binary system, in the
context of Newtonian gravity, making sure to include all relevant details and
connections to the existing literature. The tidal perturbation is decomposed in
terms of t... | [
{
"created": "Mon, 16 May 2022 11:19:44 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Jan 2024 16:10:48 GMT",
"version": "v2"
}
] | 2024-01-05 | [
[
"Pnigouras",
"Pantelis",
""
],
[
"Gittins",
"Fabian",
""
],
[
"Nanda",
"Amlan",
""
],
[
"Andersson",
"Nils",
""
],
[
"Jones",
"David Ian",
""
]
] | We carefully develop the framework required to model the dynamical tidal response of a spinning neutron star in an inspiralling binary system, in the context of Newtonian gravity, making sure to include all relevant details and connections to the existing literature. The tidal perturbation is decomposed in terms of the... |
gr-qc/9708047 | Saulo Carneiro | F. Bunchaft and S. Carneiro | Weber-like interactions and energy conservation | latex, 11 pages, no figures | Found.Phys.Lett.10:393-401,1997 | 10.1007/BF02764109 | null | gr-qc | null | Velocity dependent forces varying as $k(\hat{r}/r)(1 - \mu \dot{r}^2 + \gamma
r \ddot{r})$ (such as Weber force), here called Weber-like forces, are examined
from the point of view of energy conservation and it is proved that they are
conservative if and only if $\gamma=2\mu$. As a consequence, it is shown that
gravi... | [
{
"created": "Wed, 20 Aug 1997 18:18:13 GMT",
"version": "v1"
}
] | 2010-03-19 | [
[
"Bunchaft",
"F.",
""
],
[
"Carneiro",
"S.",
""
]
] | Velocity dependent forces varying as $k(\hat{r}/r)(1 - \mu \dot{r}^2 + \gamma r \ddot{r})$ (such as Weber force), here called Weber-like forces, are examined from the point of view of energy conservation and it is proved that they are conservative if and only if $\gamma=2\mu$. As a consequence, it is shown that gravita... |
1902.00391 | Astrid Eichhorn | Astrid Eichhorn | Steps towards Lorentzian quantum gravity with causal sets | Based on a talk given at the Ninth International Workshop DICE2018,
prepared for the proceedings of the workshop | null | 10.1088/1742-6596/1275/1/012010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Causal set quantum gravity is a Lorentzian approach to quantum gravity, based
on the causal structure of spacetime. It models each spacetime configuration as
a discrete causal network of spacetime points. As such, key questions of the
approach include whether and how a reconstruction of a sufficiently
coarse-grained ... | [
{
"created": "Fri, 1 Feb 2019 15:11:23 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Eichhorn",
"Astrid",
""
]
] | Causal set quantum gravity is a Lorentzian approach to quantum gravity, based on the causal structure of spacetime. It models each spacetime configuration as a discrete causal network of spacetime points. As such, key questions of the approach include whether and how a reconstruction of a sufficiently coarse-grained sp... |
gr-qc/0703102 | Erhard Scholz | Erhard Scholz | Scale covariant gravity and equilibrium cosmologies | 30 pp | null | null | null | gr-qc | null | Causal structure, inertial path structure and compatibility with quantum
mechanics demand no full Lorentz metric, but only an integrable Weyl geometry
for space time (Ehlers/Pirani/Schild 1972, Audretsch e.a. 1984). A proposal of
(Tann 1998,,Drechsler/Tann 1999) for a minimal coupling of the Hilbert-Einstein
action t... | [
{
"created": "Tue, 20 Mar 2007 15:56:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Scholz",
"Erhard",
""
]
] | Causal structure, inertial path structure and compatibility with quantum mechanics demand no full Lorentz metric, but only an integrable Weyl geometry for space time (Ehlers/Pirani/Schild 1972, Audretsch e.a. 1984). A proposal of (Tann 1998,,Drechsler/Tann 1999) for a minimal coupling of the Hilbert-Einstein action to ... |
1607.01699 | Paul R. Anderson | Eric D. Carlson, Paul R. Anderson, John R. Einhorn, Bradley Hicks,
Andrew J. Lundeen | Future singularities if the universe underwent Starobinsky inflation in
the past | Two references and minor changes added to the PRD version, 45 pages,
5 figures | Phys. Rev. D 95, 044012 (2017) | 10.1103/PhysRevD.95.044012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effects which quantum fields and an $\alpha_0 R^2$ term in the
gravitational Lagrangian have on future singularities are investigated. While
all values of $\alpha_0$ are considered, an emphasis is placed on those values
which are compatible with the universe having undergone Starobinsky inflation
in the past. The... | [
{
"created": "Wed, 6 Jul 2016 16:22:57 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jul 2016 15:18:30 GMT",
"version": "v2"
},
{
"created": "Thu, 12 Jan 2017 00:50:03 GMT",
"version": "v3"
},
{
"created": "Tue, 15 Aug 2017 17:12:42 GMT",
"version": "v4"
},
{
"cr... | 2017-08-24 | [
[
"Carlson",
"Eric D.",
""
],
[
"Anderson",
"Paul R.",
""
],
[
"Einhorn",
"John R.",
""
],
[
"Hicks",
"Bradley",
""
],
[
"Lundeen",
"Andrew J.",
""
]
] | The effects which quantum fields and an $\alpha_0 R^2$ term in the gravitational Lagrangian have on future singularities are investigated. While all values of $\alpha_0$ are considered, an emphasis is placed on those values which are compatible with the universe having undergone Starobinsky inflation in the past. These... |
2009.00362 | Maciej Ossowski | Jerzy Lewandowski and Maciej Ossowski | Projectively non-singular horizons in Kerr-NUT-de Sitter spacetimes | 11 pages | Phys. Rev. D 102, 124055 (2020) | 10.1103/PhysRevD.102.124055 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was recently discovered that Killing horizons in the generic
Kerr-NUT-(anti) de Sitter spacetimes are projectively singular, i.e. their
spaces of the null generators have singular geometry. Only if the cosmological
constant takes the special value determined by the Kerr and NUT parameters, and
the radius of the ho... | [
{
"created": "Tue, 1 Sep 2020 11:34:56 GMT",
"version": "v1"
}
] | 2021-01-04 | [
[
"Lewandowski",
"Jerzy",
""
],
[
"Ossowski",
"Maciej",
""
]
] | It was recently discovered that Killing horizons in the generic Kerr-NUT-(anti) de Sitter spacetimes are projectively singular, i.e. their spaces of the null generators have singular geometry. Only if the cosmological constant takes the special value determined by the Kerr and NUT parameters, and the radius of the hori... |
gr-qc/0602026 | Michael Koppitz | John G. Baker, Joan Centrella, Dae-Il Choi, Michael Koppitz, James van
Meter | Binary black hole merger dynamics and waveforms | 11 pages, 11 figures, submitted to PRD, update citations, minor
changes | Phys.Rev.D73:104002,2006 | 10.1103/PhysRevD.73.104002 | null | gr-qc astro-ph | null | We study dynamics and radiation generation in the last few orbits and merger
of a binary black hole system, applying recently developed techniques for
simulations of moving black holes. Our analysis of the gravitational radiation
waveforms and dynamical black hole trajectories produces a consistent picture
for a set ... | [
{
"created": "Tue, 7 Feb 2006 20:48:32 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Feb 2006 21:05:38 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Baker",
"John G.",
""
],
[
"Centrella",
"Joan",
""
],
[
"Choi",
"Dae-Il",
""
],
[
"Koppitz",
"Michael",
""
],
[
"van Meter",
"James",
""
]
] | We study dynamics and radiation generation in the last few orbits and merger of a binary black hole system, applying recently developed techniques for simulations of moving black holes. Our analysis of the gravitational radiation waveforms and dynamical black hole trajectories produces a consistent picture for a set of... |
1603.08955 | Kent Yagi | Nicolas Yunes, Kent Yagi, Frans Pretorius | Theoretical Physics Implications of the Binary Black-Hole Mergers
GW150914 and GW151226 | 42 pages, 15 figures; entire manuscript rewritten significantly,
additional calculations including those for GW151226 added, accepted to Phys.
Rev. D | null | 10.1103/PhysRevD.94.084002 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational wave observations GW150914 and GW151226 by Advanced LIGO
provide the first opportunity to learn about physics in the extreme gravity
environment of coalescing binary black holes. The LIGO Scientific Collaboration
and the Virgo Collaboration have verified that this observation is consistent
with Gene... | [
{
"created": "Tue, 29 Mar 2016 20:35:18 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Sep 2016 03:33:03 GMT",
"version": "v2"
}
] | 2016-11-03 | [
[
"Yunes",
"Nicolas",
""
],
[
"Yagi",
"Kent",
""
],
[
"Pretorius",
"Frans",
""
]
] | The gravitational wave observations GW150914 and GW151226 by Advanced LIGO provide the first opportunity to learn about physics in the extreme gravity environment of coalescing binary black holes. The LIGO Scientific Collaboration and the Virgo Collaboration have verified that this observation is consistent with Genera... |
gr-qc/0401084 | Luca Lusanna | Luca Lusanna (INFN, Firenze) | Canonical Reduction of Gravity: from General Covariance to Dirac
Observables and post-Minkowskian Background-Independent Gravitational Waves | 9 pages, Talk given at the Symposium QTS3 on Quantum Theory and
Symmetries, Cincinnati, September, 10-14 2003 | null | 10.1142/9789812702340_0018 | null | gr-qc | null | The status of canonical reduction for metric and tetrad gravity in
space-times of the Christodoulou-Klainermann type, where the ADM energy rules
the time evolution, is reviewed. Since in these space-times there is an
asymptotic Minkowski metric at spatial infinity, it is possible to define a
Hamiltonian linearization... | [
{
"created": "Tue, 20 Jan 2004 10:34:17 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Lusanna",
"Luca",
"",
"INFN, Firenze"
]
] | The status of canonical reduction for metric and tetrad gravity in space-times of the Christodoulou-Klainermann type, where the ADM energy rules the time evolution, is reviewed. Since in these space-times there is an asymptotic Minkowski metric at spatial infinity, it is possible to define a Hamiltonian linearization i... |
gr-qc/0210002 | Jose Luis Jaramillo | V. Aldaya, J.L. Jaramillo | Extended diffeomorphism algebras in (quantum) gravitational physics | 20 pages, LATEX, no figures | Int.J.Mod.Phys. A18 (2003) 5795 | 10.1142/S0217751X03016021 | null | gr-qc | null | We construct an explicit representation of the algebra of local
diffeomorphisms of a manifold with realistic dimensions. This is achieved in
the setting of a general approach to the (quantum) dynamics of a physical
system which is characterized by the fundamental role assigned to a basic
underlying symmetry. The deve... | [
{
"created": "Tue, 1 Oct 2002 16:50:16 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Aldaya",
"V.",
""
],
[
"Jaramillo",
"J. L.",
""
]
] | We construct an explicit representation of the algebra of local diffeomorphisms of a manifold with realistic dimensions. This is achieved in the setting of a general approach to the (quantum) dynamics of a physical system which is characterized by the fundamental role assigned to a basic underlying symmetry. The develo... |
1509.03835 | Maxim Eingorn | Maxim Eingorn | First-order Cosmological Perturbations Engendered by Point-like Masses | v2: a paragraph between Eqs. (2.14) and (2.15) as well as a paragraph
containing new Eq. (3.6) have been added; v3 (matching the publication in The
Astrophysical Journal) = v2 + minor changes + extra discussion + new Refs.;
comments welcome | ApJ 825, 84 (2016) | 10.3847/0004-637X/825/2/84 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of the concordance cosmological model the first-order scalar
and vector perturbations of the homogeneous background are derived in the weak
gravitational field limit without any supplementary approximations. The sources
of these perturbations (inhomogeneities) are presented in the discrete form of
a ... | [
{
"created": "Sun, 13 Sep 2015 11:31:52 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jan 2016 16:35:52 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Jul 2016 19:28:43 GMT",
"version": "v3"
}
] | 2016-07-06 | [
[
"Eingorn",
"Maxim",
""
]
] | In the framework of the concordance cosmological model the first-order scalar and vector perturbations of the homogeneous background are derived in the weak gravitational field limit without any supplementary approximations. The sources of these perturbations (inhomogeneities) are presented in the discrete form of a sy... |
2310.02267 | Archana Dixit Dr. | Anirudh Pradhan, Archana Dixit, M. Zeyauddin, S. Krishnannair | A flat FLRW dark energy model in f(Q,C)-gravity theory with
observational constraints | pages 18 , Figures 10 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the recently suggested modified non-metricity gravity theory with boundary
terms in a flat FLRWspacetime universe, dark energy scenarios of cosmological
models are examined in this study. An arbitrary function, $f(Q,
C)=Q+{\alpha}C^{2}$, has been taken into consideration, where Q is the
non-metricity scalar, C is ... | [
{
"created": "Sat, 16 Sep 2023 08:01:34 GMT",
"version": "v1"
}
] | 2023-10-05 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Dixit",
"Archana",
""
],
[
"Zeyauddin",
"M.",
""
],
[
"Krishnannair",
"S.",
""
]
] | In the recently suggested modified non-metricity gravity theory with boundary terms in a flat FLRWspacetime universe, dark energy scenarios of cosmological models are examined in this study. An arbitrary function, $f(Q, C)=Q+{\alpha}C^{2}$, has been taken into consideration, where Q is the non-metricity scalar, C is th... |
2201.13199 | Eugene Maslov | Vladimir A. Koutvitsky and Eugene M. Maslov | Passage of test particles through oscillating spherically-symmetric dark
matter configurations | 16 pages, 4 figures | Phys. Rev. D 104, 124046 (2021) | 10.1103/PhysRevD.104.124046 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Applying the perturbative approach to geodesic equations, we study motion of
the test particles in time-dependent spherically symmetric spacetimes created
by oscillating dark matter. Assuming the weakness of the gravitational field,
we derive general formulas that describe infinite trajectories of the test
particles ... | [
{
"created": "Mon, 31 Jan 2022 13:06:03 GMT",
"version": "v1"
}
] | 2022-02-01 | [
[
"Koutvitsky",
"Vladimir A.",
""
],
[
"Maslov",
"Eugene M.",
""
]
] | Applying the perturbative approach to geodesic equations, we study motion of the test particles in time-dependent spherically symmetric spacetimes created by oscillating dark matter. Assuming the weakness of the gravitational field, we derive general formulas that describe infinite trajectories of the test particles an... |
1711.04064 | Shuang Yu | Shuang Yu, Changjun Gao, Mingjun Liu | On static and spherically symmetric solutions of Starobinsky model | 7 pages, RAA accepted | Res. Astron. Astrophys. 18, 157 (2018) | 10.1088/1674-4527/18/12/157 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the problem of static and spherically symmetric solutions in
the Starobinsky gravity model. By extending the Lichnerowicz and Israel
theorems, William Nelson have demonstrated that the Schwarzschild solution is
the unique static, spherically symmetric, and asymptotically flat black hole
solution in the... | [
{
"created": "Sat, 11 Nov 2017 02:36:58 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Nov 2017 06:29:45 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Jan 2018 01:54:48 GMT",
"version": "v3"
},
{
"created": "Wed, 10 Jan 2018 02:38:12 GMT",
"version": "v4"
},
{
"cr... | 2020-05-27 | [
[
"Yu",
"Shuang",
""
],
[
"Gao",
"Changjun",
""
],
[
"Liu",
"Mingjun",
""
]
] | We investigate the problem of static and spherically symmetric solutions in the Starobinsky gravity model. By extending the Lichnerowicz and Israel theorems, William Nelson have demonstrated that the Schwarzschild solution is the unique static, spherically symmetric, and asymptotically flat black hole solution in the S... |
2001.06100 | Alexander Zhidenko | R. A. Konoplya and A. Zhidenko | General parametrization of black holes: the only parameters that matter | 6 pages, 1 figure, new material on rotating black holes is added -
the version accepted for publication in Physical Review D | Phys. Rev. D 101, 124004 (2020) | 10.1103/PhysRevD.101.124004 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The general parametrization of a black-hole spacetime in arbitrary metric
theories of gravity includes an infinite set of parameters. It is natural to
suppose that essential astrophysically observable quantities, such as
quasinormal modes, parameters of shadow, electromagnetic radiation and
accreting matter in the vi... | [
{
"created": "Thu, 16 Jan 2020 22:31:11 GMT",
"version": "v1"
},
{
"created": "Wed, 20 May 2020 18:08:42 GMT",
"version": "v2"
}
] | 2020-06-04 | [
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | The general parametrization of a black-hole spacetime in arbitrary metric theories of gravity includes an infinite set of parameters. It is natural to suppose that essential astrophysically observable quantities, such as quasinormal modes, parameters of shadow, electromagnetic radiation and accreting matter in the vici... |
1701.01548 | Yeong-Bok Bae | Yeong-Bok Bae, Hyung Mok Lee, Gungwon Kang, and Jakob Hansen | Gravitational radiation driven capture in unequal mass black hole
encounters | 10 pages, 9 figures | Phys. Rev. D 96, 084009 (2017) | 10.1103/PhysRevD.96.084009 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational radiation driven capture (GR capture) between unequal mass
black holes without spins has been investigated with numerical relativistic
simulations. We adopt the parabolic approximation which assumes that the
gravitational wave radiation from a weakly hyperbolic orbit is the same as that
from the par... | [
{
"created": "Fri, 6 Jan 2017 05:44:27 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Oct 2017 07:17:49 GMT",
"version": "v2"
}
] | 2017-10-25 | [
[
"Bae",
"Yeong-Bok",
""
],
[
"Lee",
"Hyung Mok",
""
],
[
"Kang",
"Gungwon",
""
],
[
"Hansen",
"Jakob",
""
]
] | The gravitational radiation driven capture (GR capture) between unequal mass black holes without spins has been investigated with numerical relativistic simulations. We adopt the parabolic approximation which assumes that the gravitational wave radiation from a weakly hyperbolic orbit is the same as that from the parab... |
0809.3039 | Alberto Saa | Rodrigo P. Macedo and Alberto Saa | Gravitational wave recoil in Robinson-Trautman spacetimes | 9 pages, 6 figures, final version to appear in PRD | Phys.Rev.D78:104025,2008 | 10.1103/PhysRevD.78.104025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the gravitational recoil due to non-reflection-symmetric
gravitational wave emission in the context of axisymmetric Robinson-Trautman
spacetimes. We show that regular initial data evolve generically into a final
configuration corresponding to a Schwarzschild black-hole moving with constant
speed. For the ... | [
{
"created": "Thu, 18 Sep 2008 00:13:53 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Nov 2008 21:59:50 GMT",
"version": "v2"
}
] | 2009-02-23 | [
[
"Macedo",
"Rodrigo P.",
""
],
[
"Saa",
"Alberto",
""
]
] | We consider the gravitational recoil due to non-reflection-symmetric gravitational wave emission in the context of axisymmetric Robinson-Trautman spacetimes. We show that regular initial data evolve generically into a final configuration corresponding to a Schwarzschild black-hole moving with constant speed. For the ca... |
2402.15110 | Md Arif Shaikh | Md Arif Shaikh, Sajad A. Bhat and Shasvath J. Kapadia | A study of the Inspiral-Merger-Ringdown Consistency Test with
gravitational-wave signals from compact binaries in eccentric orbits | 15 pages, 6 figures, matches the published version | Phys. Rev. D, 110, 024030, (2024) | 10.1103/PhysRevD.110.024030 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | The Inspiral Merger Ringdown Consistency Test (IMRCT) is one among a battery
of tests of general relativity (GR) employed by the LIGO-Virgo-KAGRA (LVK)
collaboration. It is used to search for deviations from GR in detected
gravitational waves (GWs) from compact binary coalescences (CBCs) in a
model-agnostic way. The ... | [
{
"created": "Fri, 23 Feb 2024 05:47:10 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Jul 2024 06:46:01 GMT",
"version": "v2"
}
] | 2024-07-19 | [
[
"Shaikh",
"Md Arif",
""
],
[
"Bhat",
"Sajad A.",
""
],
[
"Kapadia",
"Shasvath J.",
""
]
] | The Inspiral Merger Ringdown Consistency Test (IMRCT) is one among a battery of tests of general relativity (GR) employed by the LIGO-Virgo-KAGRA (LVK) collaboration. It is used to search for deviations from GR in detected gravitational waves (GWs) from compact binary coalescences (CBCs) in a model-agnostic way. The te... |
2012.14242 | Cong Zhang | Cong Zhang, Shicong Song and Muxin Han | First-Order Quantum Correction in Coherent State Expectation Value of
Loop-Quantum-Gravity Hamiltonian: Overview and Results | 24 pages | null | null | null | gr-qc astro-ph.CO hep-lat hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Given the Loop-Quantum-Gravity (LQG) non-graph-changing Hamiltonian
$\widehat{H[N]}$, the coherent state expectation value
$\langle\widehat{H[N]}\rangle$ admits an semiclassical expansion in
$\ell^2_{\rm p}$. In this paper, we compute explicitly the expansion of
$\langle\widehat{H[N]}\rangle$ on the cubic graph to th... | [
{
"created": "Mon, 28 Dec 2020 14:16:32 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jan 2021 01:10:16 GMT",
"version": "v2"
},
{
"created": "Tue, 2 Nov 2021 21:51:24 GMT",
"version": "v3"
},
{
"created": "Mon, 16 May 2022 14:00:20 GMT",
"version": "v4"
}
] | 2022-05-17 | [
[
"Zhang",
"Cong",
""
],
[
"Song",
"Shicong",
""
],
[
"Han",
"Muxin",
""
]
] | Given the Loop-Quantum-Gravity (LQG) non-graph-changing Hamiltonian $\widehat{H[N]}$, the coherent state expectation value $\langle\widehat{H[N]}\rangle$ admits an semiclassical expansion in $\ell^2_{\rm p}$. In this paper, we compute explicitly the expansion of $\langle\widehat{H[N]}\rangle$ on the cubic graph to the ... |
1310.7786 | Daniele Oriti | Daniele Oriti | Group field theory as the 2nd quantization of Loop Quantum Gravity | 24 pages, 5 figures; RevTex4; v2: clarifications on the definition of
the LQG Hilbert space added, presentation of the GFT Hilbert space and of the
relation with LQG one improved in substantial ways, notation slightly
modified, several typos corrected. Matches submitted version | null | null | AEI-2013-256 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a 2nd quantized reformulation of canonical Loop Quantum Gravity
at both kinematical and dynamical level, in terms of a Fock space of spin
networks, and show in full generality that it leads directly to the Group Field
Theory formalism. In particular, we show the correspondence between canonical
LQG dynam... | [
{
"created": "Tue, 29 Oct 2013 12:38:23 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Aug 2015 09:03:19 GMT",
"version": "v2"
}
] | 2015-08-19 | [
[
"Oriti",
"Daniele",
""
]
] | We construct a 2nd quantized reformulation of canonical Loop Quantum Gravity at both kinematical and dynamical level, in terms of a Fock space of spin networks, and show in full generality that it leads directly to the Group Field Theory formalism. In particular, we show the correspondence between canonical LQG dynamic... |
gr-qc/0307038 | Dr. Anirudh Pradhan | Anirudh Pradhan and Hare Ram Pandey | Bulk Viscous cosmological models in Lyra geometry | 18 pages, 7figures | null | null | null | gr-qc | null | We have investigated an LRS Bianchi Type I models with bulk viscosity in the
cosmological theory based on Lyra's geometry. A new class of exact solutions
have been obtained by considering a time-dependent displacement field for a
constant value of the deceleration parameter and viscosity coefficient of bulk
viscous f... | [
{
"created": "Wed, 9 Jul 2003 11:10:16 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Pandey",
"Hare Ram",
""
]
] | We have investigated an LRS Bianchi Type I models with bulk viscosity in the cosmological theory based on Lyra's geometry. A new class of exact solutions have been obtained by considering a time-dependent displacement field for a constant value of the deceleration parameter and viscosity coefficient of bulk viscous flu... |
gr-qc/9411018 | Shunya Mizoguchi | Shun'ya Mizoguchi | The Geroch group in the Ashtekar formulation | 40 pages, revtex | Phys.Rev. D51 (1995) 6788-6802 | 10.1103/PhysRevD.51.6788 | DESY 94-199 | gr-qc hep-th | null | We study the Geroch group in the framework of the Ashtekar formulation. In
the case of the one-Killing-vector reduction, it turns out that the third
column of the Ashtekar connection is essentially the gradient of the Ernst
potential, which implies that the both quantities are based on the ``same''
complexification. ... | [
{
"created": "Mon, 7 Nov 1994 16:08:54 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Mizoguchi",
"Shun'ya",
""
]
] | We study the Geroch group in the framework of the Ashtekar formulation. In the case of the one-Killing-vector reduction, it turns out that the third column of the Ashtekar connection is essentially the gradient of the Ernst potential, which implies that the both quantities are based on the ``same'' complexification. In... |
0712.3737 | Mark Hannam | Achamveedu Gopakumar, Mark Hannam, Sascha Husa, Bernd Br\"ugmann | Comparison between numerical relativity and a new class of
post-Newtonian gravitational-wave phase evolutions: the non-spinning
equal-mass case | 6 pages, 4 figures | Phys.Rev.D78:064026,2008 | 10.1103/PhysRevD.78.064026 | null | gr-qc | null | We compare the phase evolution of equal-mass nonspinning black-hole binaries
from numerical relativity (NR) simulations with post-Newtonian (PN) results
obtained from three PN approximants: the TaylorT1 and T4 approximants, for
which NR-PN comparisons have already been performed in the literature, and the
recently pr... | [
{
"created": "Fri, 21 Dec 2007 16:30:05 GMT",
"version": "v1"
}
] | 2009-02-24 | [
[
"Gopakumar",
"Achamveedu",
""
],
[
"Hannam",
"Mark",
""
],
[
"Husa",
"Sascha",
""
],
[
"Brügmann",
"Bernd",
""
]
] | We compare the phase evolution of equal-mass nonspinning black-hole binaries from numerical relativity (NR) simulations with post-Newtonian (PN) results obtained from three PN approximants: the TaylorT1 and T4 approximants, for which NR-PN comparisons have already been performed in the literature, and the recently prop... |
2210.10955 | Benjamin Elder | Benjamin Elder, Jeremy Sakstein | Mapping the Weak-Field Limit of Scalar-Gauss-Bonnet Gravity | 18 pages | null | 10.1103/PhysRevD.107.044006 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the weak field limit of scalar-Gauss-Bonnet theory and place novel
bounds on the parameter space using terrestrial and space-based experiments. In
order to analyze the theory in the context of a wide range of experiments, we
compute the deviations from Einstein gravity around source masses with planar,
cyli... | [
{
"created": "Thu, 20 Oct 2022 01:57:11 GMT",
"version": "v1"
}
] | 2023-02-15 | [
[
"Elder",
"Benjamin",
""
],
[
"Sakstein",
"Jeremy",
""
]
] | We derive the weak field limit of scalar-Gauss-Bonnet theory and place novel bounds on the parameter space using terrestrial and space-based experiments. In order to analyze the theory in the context of a wide range of experiments, we compute the deviations from Einstein gravity around source masses with planar, cylind... |
2104.10936 | Salvatore Capozziello | Salvatore Capozziello, Shin'ichi Nojiri, Sergei D. Odintsov | Thermal effects and scalar modes in the cosmological propagation of
gravitational waves | 21 pages, accepted for publication in Physics of the Dark Universe | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider thermal effects in the propagation of gravitational waves on a
cosmological background. In particular, we consider scalar field cosmologies
and study gravitational modes near cosmological singularities. We point out
that the contribution of thermal radiation can heavily affect the dynamics of
gravitationa... | [
{
"created": "Thu, 22 Apr 2021 09:06:39 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Aug 2021 08:32:10 GMT",
"version": "v2"
}
] | 2021-08-10 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
]
] | We consider thermal effects in the propagation of gravitational waves on a cosmological background. In particular, we consider scalar field cosmologies and study gravitational modes near cosmological singularities. We point out that the contribution of thermal radiation can heavily affect the dynamics of gravitational ... |
1812.01140 | Fabricio Matos Ferreira | Fabricio M. Ferreira and Ilya L. Shapiro | Constructing the independent basis of total derivative
curvature-dependent terms in $6D$ | Modified and seriously extended version, prepared for submission to a
journal. The extention mainly concerns the origins of the identity which
restricts the surface terms | Phys. Rev. D 99, 064032 (2019) | 10.1103/PhysRevD.99.064032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Total derivative terms play an important role in the integration of conformal
anomaly. In four dimensional space $4D$ there is only one such term, namely
$\,{\square}R$. In the case of six dimensions $6D$ the structure of surface
terms is more complicated, and it is useful to construct a basis of linear
independent t... | [
{
"created": "Tue, 4 Dec 2018 00:26:50 GMT",
"version": "v1"
},
{
"created": "Sun, 23 Dec 2018 19:07:14 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Feb 2019 18:05:50 GMT",
"version": "v3"
}
] | 2019-03-27 | [
[
"Ferreira",
"Fabricio M.",
""
],
[
"Shapiro",
"Ilya L.",
""
]
] | Total derivative terms play an important role in the integration of conformal anomaly. In four dimensional space $4D$ there is only one such term, namely $\,{\square}R$. In the case of six dimensions $6D$ the structure of surface terms is more complicated, and it is useful to construct a basis of linear independent tot... |
2112.04149 | Zhen Zhang | Zhen Zhang | Geometrization of light bending and its application to SdSw spacetime | 31 pages, 3 figures | Class. Quantum Grav. 39 (2022) 015003 | 10.1088/1361-6382/ac38d1 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The mysterious dark energy remains one of the greatest puzzles of modern
science. Current detections for it are mostly indirect. The spacetime effects
of dark energy can be locally described by the SdSw metric. Understanding these
local effects exactly is an essential step towards the direct probe of dark
energy. Fro... | [
{
"created": "Wed, 8 Dec 2021 07:34:28 GMT",
"version": "v1"
}
] | 2021-12-09 | [
[
"Zhang",
"Zhen",
""
]
] | The mysterious dark energy remains one of the greatest puzzles of modern science. Current detections for it are mostly indirect. The spacetime effects of dark energy can be locally described by the SdSw metric. Understanding these local effects exactly is an essential step towards the direct probe of dark energy. From ... |
gr-qc/0507004 | Manuel Tiglio | Luis Lehner, Oscar Reula and Manuel Tiglio | Multi-block simulations in general relativity: high order
discretizations, numerical stability, and applications | 35 pages | Class.Quant.Grav. 22 (2005) 5283-5322 | 10.1088/0264-9381/22/24/006 | null | gr-qc | null | The need to smoothly cover a computational domain of interest generically
requires the adoption of several grids. To solve the problem of interest under
this grid-structure one must ensure the suitable transfer of information among
the different grids involved. In this work we discuss a technique that allows
one to c... | [
{
"created": "Fri, 1 Jul 2005 17:40:27 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Lehner",
"Luis",
""
],
[
"Reula",
"Oscar",
""
],
[
"Tiglio",
"Manuel",
""
]
] | The need to smoothly cover a computational domain of interest generically requires the adoption of several grids. To solve the problem of interest under this grid-structure one must ensure the suitable transfer of information among the different grids involved. In this work we discuss a technique that allows one to con... |
gr-qc/9509015 | Bill Hiscock | Rhett Herman and William A. Hiscock (Montana State University) | Renormalization of the charged scalar field in curved space | 24 pages REVTex | Phys.Rev. D53 (1996) 3285-3295 | 10.1103/PhysRevD.53.3285 | null | gr-qc | null | The DeWitt-Schwinger proper time point-splitting procedure is applied to a
massive complex scalar field with arbitrary curvature coupling interacting with
a classical electromagnetic field in a general curved spacetime. The scalar
field current is found to have a linear divergence. The presence of the
external backgr... | [
{
"created": "Thu, 7 Sep 1995 20:58:40 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Herman",
"Rhett",
"",
"Montana State University"
],
[
"Hiscock",
"William A.",
"",
"Montana State University"
]
] | The DeWitt-Schwinger proper time point-splitting procedure is applied to a massive complex scalar field with arbitrary curvature coupling interacting with a classical electromagnetic field in a general curved spacetime. The scalar field current is found to have a linear divergence. The presence of the external backgrou... |
2007.06829 | Tanmoy Paul | Shinichi Nojiri, S. D. Odintsov, V. K. Oikonomou, Tanmoy Paul | Unifying Holographic Inflation with Holographic Dark Energy: a Covariant
Approach | PRD to appear | Phys. Rev. D 102, 023540 (2020) | 10.1103/PhysRevD.102.023540 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper, we use the holographic approach to describe the
early-time acceleration and the late-time acceleration eras of our Universe in
a unified manner. Such ``holographic unification'' is found to have a
correspondence with various higher curvature cosmological models with or
without matter fields. The... | [
{
"created": "Tue, 14 Jul 2020 05:32:59 GMT",
"version": "v1"
}
] | 2020-08-05 | [
[
"Nojiri",
"Shinichi",
""
],
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
],
[
"Paul",
"Tanmoy",
""
]
] | In the present paper, we use the holographic approach to describe the early-time acceleration and the late-time acceleration eras of our Universe in a unified manner. Such ``holographic unification'' is found to have a correspondence with various higher curvature cosmological models with or without matter fields. The c... |
1312.6898 | Ghulam Abbas | G. Abbas | Effects of Electromagnetic Field on The Collapse and Expansion of
Anisotropic Gravitating Source | 16 pages, 5 figures. Accepted for Publication in Astrophysics and
Space Science. An updated version to be matched with Accepted version | Astrophys. Space Sci 352(2014)955 | 10.1007/s10509-014-1986-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to study the effects of electromagnetic on the collapse
and expansion of anisotropic gravitating source. For this purpose, we have
evaluated the generating solutions of Einstein-Maxwell field equations with
spherically symmetric anisotropic gravitating source. We found that a single
function gen... | [
{
"created": "Mon, 23 Dec 2013 10:19:20 GMT",
"version": "v1"
},
{
"created": "Tue, 27 May 2014 11:15:53 GMT",
"version": "v2"
}
] | 2015-06-18 | [
[
"Abbas",
"G.",
""
]
] | This paper is devoted to study the effects of electromagnetic on the collapse and expansion of anisotropic gravitating source. For this purpose, we have evaluated the generating solutions of Einstein-Maxwell field equations with spherically symmetric anisotropic gravitating source. We found that a single function gener... |
1001.5208 | Peter Hess O | Peter O. Hess, Leila Maghlaoui and Walter Greiner | The Robertson-Walker Metric in a Pseudo-Complex General Relativity | 31 pages, 2 figures | null | 10.1142/S021830131001576X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the consequences of the pseudo-complex General Relativity
within a pseudo-complexified Roberston-Walker metric. A contribution to the
energy-momentum tensor arises, which corresponds to a dark energy and may
change with the radius of the universe, i.e., time. Only when the Hubble
function $H$ does not ... | [
{
"created": "Thu, 28 Jan 2010 16:14:44 GMT",
"version": "v1"
}
] | 2015-05-18 | [
[
"Hess",
"Peter O.",
""
],
[
"Maghlaoui",
"Leila",
""
],
[
"Greiner",
"Walter",
""
]
] | We investigate the consequences of the pseudo-complex General Relativity within a pseudo-complexified Roberston-Walker metric. A contribution to the energy-momentum tensor arises, which corresponds to a dark energy and may change with the radius of the universe, i.e., time. Only when the Hubble function $H$ does not ch... |
1207.6852 | Salvador Robles-Perez | A. Alonso-Serrano, C. Bastos, O. Bertolami, and S. Robles-Perez | Interacting universes and the cosmological constant | 7 pages | Phys. Lett. B 719 (2013) 200-205 | 10.1016/j.physletb.2013.01.013 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study some collective phenomena that may happen in a multiverse scenario.
First, it is posed an interaction scheme between universes whose evolution is
dominated by a cosmological constant. As a result of the interaction, the value
of the cosmological constant of one of the universes becomes very close to zero
at ... | [
{
"created": "Mon, 30 Jul 2012 07:10:42 GMT",
"version": "v1"
}
] | 2017-08-04 | [
[
"Alonso-Serrano",
"A.",
""
],
[
"Bastos",
"C.",
""
],
[
"Bertolami",
"O.",
""
],
[
"Robles-Perez",
"S.",
""
]
] | We study some collective phenomena that may happen in a multiverse scenario. First, it is posed an interaction scheme between universes whose evolution is dominated by a cosmological constant. As a result of the interaction, the value of the cosmological constant of one of the universes becomes very close to zero at th... |
1009.4686 | Jolyon Bloomfield | Jolyon K. Bloomfield and \'Eanna \'E. Flanagan | Gravitational Interactions in a General Multibrane Model | 18 pages, 4 figures. Version 2 (submitted to PRD) adds analysis on
orbifolds | Phys. Rev. D 84 (2011) 104016 | 10.1103/PhysRevD.84.104016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational interactions of the four-dimensional effective theory
describing a general $N$-brane model in five dimensions without radion
stabilization are analyzed. Both uncompactified and orbifolded models are
considered. The parameter space is constrained by requiring that there be no
ghost modes in the theor... | [
{
"created": "Thu, 23 Sep 2010 19:32:34 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Jan 2011 18:51:54 GMT",
"version": "v2"
}
] | 2011-11-16 | [
[
"Bloomfield",
"Jolyon K.",
""
],
[
"Flanagan",
"Éanna É.",
""
]
] | The gravitational interactions of the four-dimensional effective theory describing a general $N$-brane model in five dimensions without radion stabilization are analyzed. Both uncompactified and orbifolded models are considered. The parameter space is constrained by requiring that there be no ghost modes in the theory,... |
gr-qc/0702090 | Douglas Shaw | Douglas J. Shaw | Detecting Seasonal Changes in the Fundamental Constants | 4 pages, 1 figure | null | null | null | gr-qc astro-ph hep-ph physics.atom-ph | null | We show that if one or more of the `constants' of Nature can vary then their
values, as measured in the laboratory, should oscillate over the year in a very
particular way. These seasonal changes in the constants could well be detected,
in the near future, with ground-based atomic clocks.
| [
{
"created": "Thu, 15 Feb 2007 15:38:12 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Shaw",
"Douglas J.",
""
]
] | We show that if one or more of the `constants' of Nature can vary then their values, as measured in the laboratory, should oscillate over the year in a very particular way. These seasonal changes in the constants could well be detected, in the near future, with ground-based atomic clocks. |
gr-qc/0112056 | Luc Blanchet | Luc Blanchet | Innermost circular orbit of binary black holes at the third
post-Newtonian approximation | 21 pages, to appear in Phys. Rev. D (spin effects appropriate to
corotational black-hole binaries are included; discussion on the validity of
the approximation is added) | Phys.Rev.D65:124009,2002 | 10.1103/PhysRevD.65.124009 | null | gr-qc | null | The equations of motion of two point masses have recently been derived at the
3PN approximation of general relativity. From that work we determine the
location of the innermost circular orbit or ICO, defined by the minimum of the
binary's 3PN energy as a function of the orbital frequency for circular orbits.
We find ... | [
{
"created": "Fri, 21 Dec 2001 20:18:20 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Feb 2002 17:29:01 GMT",
"version": "v2"
},
{
"created": "Fri, 29 Mar 2002 23:06:04 GMT",
"version": "v3"
},
{
"created": "Thu, 16 May 2002 17:07:20 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Blanchet",
"Luc",
""
]
] | The equations of motion of two point masses have recently been derived at the 3PN approximation of general relativity. From that work we determine the location of the innermost circular orbit or ICO, defined by the minimum of the binary's 3PN energy as a function of the orbital frequency for circular orbits. We find th... |
gr-qc/9301016 | null | Lee Smolin | Time, measurement and information loss in quantum cosmology | Latex, no figures, 57 pages, SU-GP-92/12-4 | null | null | null | gr-qc hep-th | null | An error in the gauge fixed quantization of section 3 is corrected. The
result is a much simpler treatment of the clock field, leading to a
simplification of the gauge fixed quantum theory and the treatment of the
semiclassical limit.
| [
{
"created": "Fri, 15 Jan 1993 14:00:00 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Feb 1993 12:28:00 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Smolin",
"Lee",
""
]
] | An error in the gauge fixed quantization of section 3 is corrected. The result is a much simpler treatment of the clock field, leading to a simplification of the gauge fixed quantum theory and the treatment of the semiclassical limit. |
2210.03081 | Javier Bad\'ia | Javier Bad\'ia, Ernesto F. Eiroa | Shadows of rotating Einstein-Maxwell-dilaton black holes surrounded by a
plasma | 14 pages, 5 figures; v2: improved and extended version, new
references added | Phys. Rev. D 107, 124028 (2023) | 10.1103/PhysRevD.107.124028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider rotating charged black holes with a scalar dilaton field and
surrounded by plasma, with the purpose of studying their shadows. The
corresponding metric has been previously obtained in the literature from the
static solution by using the Newman-Janis algorithm. Assuming a well known form
for the pressurele... | [
{
"created": "Thu, 6 Oct 2022 17:36:29 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Jun 2023 12:25:51 GMT",
"version": "v2"
}
] | 2023-06-19 | [
[
"Badía",
"Javier",
""
],
[
"Eiroa",
"Ernesto F.",
""
]
] | We consider rotating charged black holes with a scalar dilaton field and surrounded by plasma, with the purpose of studying their shadows. The corresponding metric has been previously obtained in the literature from the static solution by using the Newman-Janis algorithm. Assuming a well known form for the pressureless... |
gr-qc/9807024 | Enric Verdaguer | Esteban Calzetta (IAFE and Physics Department, UBA) and Enric
Verdaguer (Departament de Fisica Fonamental and Institut de Fisica d'Altes
Energies (IFAE),Universitat de Barcelona) | Noise induced transitions in semiclassical cosmology | LaTex, 33.tex pages, no figures | Phys.Rev. D59 (1999) 083513 | 10.1103/PhysRevD.59.083513 | UBA-UB-98-1 | gr-qc astro-ph hep-th | null | A semiclassical cosmological model is considered which consists of a closed
Friedmann-Robertson-Walker in the presence of a cosmological constant, which
mimics the effect of an inflaton field, and a massless, non-conformally coupled
quantum scalar field. We show that the back-reaction of the quantum field,
which cons... | [
{
"created": "Fri, 10 Jul 1998 11:17:22 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Nov 1998 19:00:09 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Calzetta",
"Esteban",
"",
"IAFE and Physics Department, UBA"
],
[
"Verdaguer",
"Enric",
"",
"Departament de Fisica Fonamental and Institut de Fisica d'Altes\n Energies"
]
] | A semiclassical cosmological model is considered which consists of a closed Friedmann-Robertson-Walker in the presence of a cosmological constant, which mimics the effect of an inflaton field, and a massless, non-conformally coupled quantum scalar field. We show that the back-reaction of the quantum field, which consis... |
0907.3872 | Antonio Lopez Maroto | A. de la Cruz-Dombriz, A. Dobado, A. L. Maroto | Black Holes in f(R) theories | 19 pages, 9 figures. New comments and figures included. Accepted for
publication in Phys. Rev. D | Phys.Rev.D80:124011,2009 | 10.1103/PhysRevD.80.124011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of $f(R)$ theories of gravity, we address the problem of
finding static and spherically symmetric black hole solutions. Several aspects
of constant curvature solutions with and without electric charge are discussed.
We also study the general case (without imposing constant curvature). Following
a pertu... | [
{
"created": "Wed, 22 Jul 2009 16:05:13 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Nov 2009 17:13:03 GMT",
"version": "v2"
}
] | 2010-01-15 | [
[
"de la Cruz-Dombriz",
"A.",
""
],
[
"Dobado",
"A.",
""
],
[
"Maroto",
"A. L.",
""
]
] | In the context of $f(R)$ theories of gravity, we address the problem of finding static and spherically symmetric black hole solutions. Several aspects of constant curvature solutions with and without electric charge are discussed. We also study the general case (without imposing constant curvature). Following a perturb... |
2210.04177 | Andronikos Paliathanasis | Andronikos Paliathanasis | Complex Scalar fields in Scalar-Tensor and Scalar-Torsion theories | 19 pages, 5 figures, to appear in Mod. Phys. Lett. A | null | 10.1142/S0217732322501681 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We investigate the cosmological dynamics in a spatially flat
Friedmann--Lema\^{\i}tre--Robertson--Walker geometry in scalar-tensor and
scalar-torsion theories where the nonminimally coupled scalar field is a
complex field. We derive the cosmological field equations and we make use of
dimensionless variables in order ... | [
{
"created": "Sun, 9 Oct 2022 06:07:40 GMT",
"version": "v1"
}
] | 2022-11-23 | [
[
"Paliathanasis",
"Andronikos",
""
]
] | We investigate the cosmological dynamics in a spatially flat Friedmann--Lema\^{\i}tre--Robertson--Walker geometry in scalar-tensor and scalar-torsion theories where the nonminimally coupled scalar field is a complex field. We derive the cosmological field equations and we make use of dimensionless variables in order to... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.