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gr-qc/0204008 | Tomohiro Harada | Tomohiro Harada, Hideo Iguchi and Ken-ichi Nakao | Physical Processes in Naked Singularity Formation | 76 pages, 25 figure files | Prog.Theor.Phys.107:449-524,2002 | 10.1143/PTP.107.449 | null | gr-qc astro-ph hep-th | null | Gravitational collapse is one of the most fruitful subjects in gravitational
physics. It is well known that singularity formation is inevitable in complete
gravitational collapse. It was conjectured that such a singularity should be
hidden by horizons if it is formed from generic initial data with physically
reasonab... | [
{
"created": "Tue, 2 Apr 2002 10:00:27 GMT",
"version": "v1"
}
] | 2010-05-12 | [
[
"Harada",
"Tomohiro",
""
],
[
"Iguchi",
"Hideo",
""
],
[
"Nakao",
"Ken-ichi",
""
]
] | Gravitational collapse is one of the most fruitful subjects in gravitational physics. It is well known that singularity formation is inevitable in complete gravitational collapse. It was conjectured that such a singularity should be hidden by horizons if it is formed from generic initial data with physically reasonable... |
gr-qc/0606033 | Michel Leclerc | M. Leclerc | Generally covariant quantization and the Dirac field | final version, to appear in Annals Phys | AnnalsPhys.322:2279-2303,2007 | 10.1016/j.aop.2007.04.001 | null | gr-qc | null | Canonical Hamiltonian field theory in curved spacetime is formulated in a
manifestly covariant way. Second quantization is achieved invoking a
correspondence principle between the Poisson bracket of classical fields and
the commutator of the corresponding quantum operators. The Dirac theory is
investigated and it is ... | [
{
"created": "Thu, 8 Jun 2006 07:33:43 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Jun 2006 14:47:11 GMT",
"version": "v2"
},
{
"created": "Sun, 10 Sep 2006 18:59:37 GMT",
"version": "v3"
},
{
"created": "Thu, 5 Apr 2007 13:59:31 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Leclerc",
"M.",
""
]
] | Canonical Hamiltonian field theory in curved spacetime is formulated in a manifestly covariant way. Second quantization is achieved invoking a correspondence principle between the Poisson bracket of classical fields and the commutator of the corresponding quantum operators. The Dirac theory is investigated and it is sh... |
1003.1606 | Subenoy Chakraborty | Nairwita Mazumder, Subenoy Chakraborty | FRW Universe in Ho\~rava Gravity | null | Astrophys.Space Sci.330:167-171,2010 | 10.1007/s10509-010-0346-6 | Accepted for publication in Astrophysics and Space Science In 2010 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, a field theoretic model for a UV complete theory of gravity has
been proposed by Ho\~{r}ava. This theory is a non-relativistic renormalizable
gravity theory which coincides with Einstein's general relativity at large
distances. Subsequently L\"{u} et al have formulated the modified Friedmann
equations and h... | [
{
"created": "Mon, 8 Mar 2010 11:40:32 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Mazumder",
"Nairwita",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | Recently, a field theoretic model for a UV complete theory of gravity has been proposed by Ho\~{r}ava. This theory is a non-relativistic renormalizable gravity theory which coincides with Einstein's general relativity at large distances. Subsequently L\"{u} et al have formulated the modified Friedmann equations and hav... |
gr-qc/9705040 | null | Gianpiero Mangano | Path Integral Approach to Noncommutative Space-Times | Latex, 12 pages, updated version published in Journal of Mathematical
Physics, 39, 2584-2591, 1998 | J.Math.Phys. 39 (1998) 2584-2591 | 10.1063/1.532409 | DSF-19-97 | gr-qc hep-th | null | We propose a path integral formulation of noncommutative generalizations of
spacetime manifold in even dimensions, characterized by a length scale
$\lambda_P$. The commutative case is obtained in the limit $\lambda_P=0$.
| [
{
"created": "Wed, 14 May 1997 15:21:45 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Oct 1998 09:54:28 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Mangano",
"Gianpiero",
""
]
] | We propose a path integral formulation of noncommutative generalizations of spacetime manifold in even dimensions, characterized by a length scale $\lambda_P$. The commutative case is obtained in the limit $\lambda_P=0$. |
2203.12010 | Giuseppe Gaetano Luciano | Giuseppe Gaetano Luciano and Emmanuel N. Saridakis | Baryon asymmetry from Barrow entropy: theoretical predictions and
observational constraints | 6 pages, 1 figure | The European Physical Journal C volume 82, Article number: 558
(2022) | 10.1140/epjc/s10052-022-10530-7 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate the generation of baryon asymmetry from the corrections
brought about in the Friedman equations due to Barrow entropy. In particular,
by applying the gravity-thermodynamics conjecture one obtains extra terms in
the Friedmann equations that change the Hubble function evolution during the
radiation-domin... | [
{
"created": "Tue, 22 Mar 2022 19:34:56 GMT",
"version": "v1"
}
] | 2022-06-28 | [
[
"Luciano",
"Giuseppe Gaetano",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | We investigate the generation of baryon asymmetry from the corrections brought about in the Friedman equations due to Barrow entropy. In particular, by applying the gravity-thermodynamics conjecture one obtains extra terms in the Friedmann equations that change the Hubble function evolution during the radiation-dominat... |
2106.14428 | Valerio De Luca | V. De Luca, P. Pani | Tidal deformability of dressed black holes and tests of ultralight
bosons in extended mass ranges | 17 pages, 5 figures. v2: matching published version | null | 10.1088/1475-7516/2021/08/032 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The deformability of a compact object under the presence of a tidal
perturbation is encoded in the tidal Love numbers (TLNs), which vanish for
isolated black holes in vacuum. We show that the TLNs of black holes surrounded
by matter fields do not vanish and can be used to probe the environment around
binary black hol... | [
{
"created": "Mon, 28 Jun 2021 07:15:34 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Aug 2021 06:44:24 GMT",
"version": "v2"
}
] | 2021-08-25 | [
[
"De Luca",
"V.",
""
],
[
"Pani",
"P.",
""
]
] | The deformability of a compact object under the presence of a tidal perturbation is encoded in the tidal Love numbers (TLNs), which vanish for isolated black holes in vacuum. We show that the TLNs of black holes surrounded by matter fields do not vanish and can be used to probe the environment around binary black holes... |
1411.5708 | Aymen Hamid Mr | Giovanni Acquaviva, George F. R. Ellis, Rituparno Goswami, and Aymen
I. M. Hamid | Constructing black hole entropy from gravitational collapse | 8 pages, 1 figure | Phys. Rev. D 91, 064017 (2015) | 10.1103/PhysRevD.91.064017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on a recent proposal for the gravitational entropy of free
gravitational fields, we investigate the thermodynamic properties of black hole
formation through gravitational collapse in the framework of the semitetrad
1+1+2 covariant formalism. In the simplest case of an Oppenheimer-Snyder-Datt
collapse we prove t... | [
{
"created": "Thu, 20 Nov 2014 21:57:49 GMT",
"version": "v1"
}
] | 2015-03-11 | [
[
"Acquaviva",
"Giovanni",
""
],
[
"Ellis",
"George F. R.",
""
],
[
"Goswami",
"Rituparno",
""
],
[
"Hamid",
"Aymen I. M.",
""
]
] | Based on a recent proposal for the gravitational entropy of free gravitational fields, we investigate the thermodynamic properties of black hole formation through gravitational collapse in the framework of the semitetrad 1+1+2 covariant formalism. In the simplest case of an Oppenheimer-Snyder-Datt collapse we prove tha... |
1601.00257 | Minyong Guo | Minyong Guo, Chao Niu, Yu Tian, and Hongbao Zhang | Modave Lectures on Applied AdS/CFT with Numerics | typos corrected, clarifications made, JHEP style, 1+23 pages, 12
figures, Mathematica code available upon request | PoS Modave2015 (2016) 003 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | These lecture notes are intended to serve as an introduction to applied
AdS/CFT with numerics for an audience of graduate students and others with
little background in the subject. The presentation begins with a poor man's
review of current status of quantum gravity, where AdS/CFT correspondence is
believed to be the... | [
{
"created": "Sun, 3 Jan 2016 08:10:29 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Jan 2016 10:26:57 GMT",
"version": "v2"
}
] | 2016-03-22 | [
[
"Guo",
"Minyong",
""
],
[
"Niu",
"Chao",
""
],
[
"Tian",
"Yu",
""
],
[
"Zhang",
"Hongbao",
""
]
] | These lecture notes are intended to serve as an introduction to applied AdS/CFT with numerics for an audience of graduate students and others with little background in the subject. The presentation begins with a poor man's review of current status of quantum gravity, where AdS/CFT correspondence is believed to be the w... |
gr-qc/0507056 | Georgios Kraniotis | G. V. Kraniotis | Frame dragging and bending of Light in Kerr and Kerr-(anti) de Sitter
spacetimes | LaTeX file, 45 pages 1 figure, typos fixed, v3 published in Classical
and Quantum Gravity 22 (2005) 4391-4424 | Class.Quant.Grav. 22 (2005) 4391-4424 | 10.1088/0264-9381/22/21/001 | MIFP-05-16 | gr-qc | null | The equations of general relativity in the form of timelike and null
geodesics that describe motion of test particles and photons in Kerr spacetime
are solved exactly including the contribution from the cosmological constant.
We then perform a systematic application of the exact solutions obtained to the
following ca... | [
{
"created": "Wed, 13 Jul 2005 20:26:34 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2005 17:45:46 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Oct 2005 21:21:39 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Kraniotis",
"G. V.",
""
]
] | The equations of general relativity in the form of timelike and null geodesics that describe motion of test particles and photons in Kerr spacetime are solved exactly including the contribution from the cosmological constant. We then perform a systematic application of the exact solutions obtained to the following case... |
1002.4585 | Lorenzo Iorio | Lorenzo Iorio | Effects of standard and modified gravity on interplanetary ranges | LaTex, World Scientific style, 46 pages, 55 figures, 1 table, 57
references. Version in press in International Journal of Modern Physics D
(IJMPD) | Int.J.Mod.Phys.D20:181-232,2011 | 10.1142/S0218271811018780 | null | gr-qc astro-ph.EP hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We numerically investigate the impact on the two-body range by several
Newtonian and non-Newtonian dynamical effects for some Earth-planet (Mercury,
Venus, Mars, Jupiter, Saturn) pairs in view of the expected cm-level accuracy
in some future planned or proposed interplanetary ranging operations
(abridged).
| [
{
"created": "Wed, 24 Feb 2010 20:21:27 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Mar 2010 14:43:38 GMT",
"version": "v2"
},
{
"created": "Sat, 6 Mar 2010 16:28:59 GMT",
"version": "v3"
},
{
"created": "Fri, 5 Nov 2010 19:37:26 GMT",
"version": "v4"
},
{
"crea... | 2015-03-13 | [
[
"Iorio",
"Lorenzo",
""
]
] | We numerically investigate the impact on the two-body range by several Newtonian and non-Newtonian dynamical effects for some Earth-planet (Mercury, Venus, Mars, Jupiter, Saturn) pairs in view of the expected cm-level accuracy in some future planned or proposed interplanetary ranging operations (abridged). |
1807.07553 | Roberto Chan | M. Campista, R. Chan, M.F.A. da Silva, O. Goldoni, V.H. Satheeshkumar
and Jaime F. Villas da Rocha | Vacuum solutions in the Einstein-Aether Theory | 21 pages, 5 figures. Accepted for publication in Canadian Journal of
Physics | Canadian Journal of Physics 98, 10 (2020) | 10.1139/cjp-2019-0321 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein-Aether (EA) theory belongs to a class of modified gravity
theories characterized by the introduction of a time-like unit vector field,
called aether. In this scenario, a preferred frame arises as a natural
consequence of a broken Lorentz invariance. In the present work we have
obtained and analyzed some ... | [
{
"created": "Thu, 19 Jul 2018 17:52:34 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Nov 2018 10:49:40 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Mar 2019 17:01:55 GMT",
"version": "v3"
},
{
"created": "Thu, 12 Sep 2019 12:01:44 GMT",
"version": "v4"
},
{
"cr... | 2021-05-11 | [
[
"Campista",
"M.",
""
],
[
"Chan",
"R.",
""
],
[
"da Silva",
"M. F. A.",
""
],
[
"Goldoni",
"O.",
""
],
[
"Satheeshkumar",
"V. H.",
""
],
[
"da Rocha",
"Jaime F. Villas",
""
]
] | The Einstein-Aether (EA) theory belongs to a class of modified gravity theories characterized by the introduction of a time-like unit vector field, called aether. In this scenario, a preferred frame arises as a natural consequence of a broken Lorentz invariance. In the present work we have obtained and analyzed some ex... |
1501.04851 | Israel Quiros | Ricardo Garc\'ia-Salcedo, Tame Gonzalez, Francisco A. Horta-Rangel,
Israel Quiros, Daniel Sanchez-Guzm\'an | Introduction to the application of the dynamical systems theory in the
study of the dynamics of cosmological models of dark energy | 15 pages, 2 figures | Eur. J. Phys. 36 (2015) 025008 | 10.1088/0143-0807/36/2/025008 | null | gr-qc astro-ph.CO math.DS physics.ed-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The theory of the dynamical systems is a very complex subject which has
brought several surprises in the recent past in connection with the theory of
chaos and fractals. The application of the tools of the dynamical systems in
cosmological settings is less known in spite of the amount of published
scientific papers o... | [
{
"created": "Tue, 20 Jan 2015 15:45:48 GMT",
"version": "v1"
}
] | 2015-01-21 | [
[
"García-Salcedo",
"Ricardo",
""
],
[
"Gonzalez",
"Tame",
""
],
[
"Horta-Rangel",
"Francisco A.",
""
],
[
"Quiros",
"Israel",
""
],
[
"Sanchez-Guzmán",
"Daniel",
""
]
] | The theory of the dynamical systems is a very complex subject which has brought several surprises in the recent past in connection with the theory of chaos and fractals. The application of the tools of the dynamical systems in cosmological settings is less known in spite of the amount of published scientific papers on ... |
gr-qc/0607021 | Nikodem Poplawski | Nikodem J. Poplawski | The cosmic jerk parameter in f(R) gravity | 8 pages; published version | Phys.Lett. B640 (2006) 135-137 | 10.1016/j.physletb.2006.07.056 | null | gr-qc astro-ph hep-th | null | We derive the expression for the jerk parameter in $f(R)$ gravity. We use the
Palatini variational principle and the field equations in the Einstein
conformal gauge. For the particular case $f(R)=R-\frac{\alpha^2}{3R}$, the
predicted value of the jerk parameter agrees with the SNLS SNIa and X-ray
galaxy cluster dista... | [
{
"created": "Thu, 6 Jul 2006 16:42:44 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Aug 2006 19:52:45 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Poplawski",
"Nikodem J.",
""
]
] | We derive the expression for the jerk parameter in $f(R)$ gravity. We use the Palatini variational principle and the field equations in the Einstein conformal gauge. For the particular case $f(R)=R-\frac{\alpha^2}{3R}$, the predicted value of the jerk parameter agrees with the SNLS SNIa and X-ray galaxy cluster distanc... |
1511.02964 | Shahar Hod | Shahar Hod | Dragging of inertial frames in the composed black-hole-ring system | 4 pages | The European Physical Journal C 75, 541 (2015) | 10.1140/epjc/s10052-015-3787-9 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A well-established phenomenon in general relativity is the dragging of
inertial frames by a spinning object. In particular, due to the dragging of
inertial frames by a ring orbiting a central black hole, the angular-velocity
of the black-hole horizon in the composed black-hole-ring system is no longer
related to the ... | [
{
"created": "Tue, 10 Nov 2015 02:03:43 GMT",
"version": "v1"
}
] | 2016-01-26 | [
[
"Hod",
"Shahar",
""
]
] | A well-established phenomenon in general relativity is the dragging of inertial frames by a spinning object. In particular, due to the dragging of inertial frames by a ring orbiting a central black hole, the angular-velocity of the black-hole horizon in the composed black-hole-ring system is no longer related to the bl... |
1008.2838 | Sigbjorn Hervik | Sigbjorn Hervik and Alan Coley | Pseudo-Riemannian VSI spaces | 14 pages | Class.Quant.Grav.28:015008,2011 | 10.1088/0264-9381/28/1/015008 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider pseudo-Riemannian spaces of arbitrary signature for
which all of their polynomial curvature invariants vanish (VSI spaces). We
discuss an algebraic classification of pseudo-Riemannian spaces in terms of the
boost weight decomposition and define the ${\bf S}_i$- and ${\bf
N}$-properties, and ... | [
{
"created": "Tue, 17 Aug 2010 07:24:57 GMT",
"version": "v1"
}
] | 2010-12-17 | [
[
"Hervik",
"Sigbjorn",
""
],
[
"Coley",
"Alan",
""
]
] | In this paper we consider pseudo-Riemannian spaces of arbitrary signature for which all of their polynomial curvature invariants vanish (VSI spaces). We discuss an algebraic classification of pseudo-Riemannian spaces in terms of the boost weight decomposition and define the ${\bf S}_i$- and ${\bf N}$-properties, and sh... |
1403.2070 | Sanjay Jhingan | S Jhingan, D Jain and R Nair | Observational cosmology and the cosmic distance-duality relation | 4 pages, Proceedings of the 7th International Conference on
Gravitation and Cosmology, 14-19 December (2011), Goa, INDIA | J. Phys.: Conf. Ser. 484, 012035 (2014) | 10.1088/1742-6596/484/1/012035 | ICGC 2011 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the validity of cosmic distance duality relation between angular
diameter and luminosity distances. To test this duality relation we use the
latest Union2 Supernovae Type Ia (SNe Ia) data for estimating the luminosity
distance. The estimation of angular diameter distance comes from the samples of
galaxy clus... | [
{
"created": "Sun, 9 Mar 2014 16:16:34 GMT",
"version": "v1"
}
] | 2014-03-11 | [
[
"Jhingan",
"S",
""
],
[
"Jain",
"D",
""
],
[
"Nair",
"R",
""
]
] | We study the validity of cosmic distance duality relation between angular diameter and luminosity distances. To test this duality relation we use the latest Union2 Supernovae Type Ia (SNe Ia) data for estimating the luminosity distance. The estimation of angular diameter distance comes from the samples of galaxy cluste... |
2101.12471 | Roberto Casadio | Roberto Casadio, Andrea Giusti, Iber\^e Kuntz, and Giulio Neri | Effective metric outside bootstrapped Newtonian sources | 27 pages, 3 figures, minor changes to match the accepted version in
PRD | Phys. Rev. D 103, 064001 (2021) | 10.1103/PhysRevD.103.064001 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | We determine the complete space-time metric from the bootstrapped Newtonian
potential generated by a static spherically symmetric source in the surrounding
vacuum. This metric contains post-Newtonian parameters which can be further
used to constrain the complete underlying dynamical theory. For values of the
post-New... | [
{
"created": "Fri, 29 Jan 2021 08:45:50 GMT",
"version": "v1"
},
{
"created": "Sat, 13 Feb 2021 17:19:36 GMT",
"version": "v2"
}
] | 2021-03-10 | [
[
"Casadio",
"Roberto",
""
],
[
"Giusti",
"Andrea",
""
],
[
"Kuntz",
"Iberê",
""
],
[
"Neri",
"Giulio",
""
]
] | We determine the complete space-time metric from the bootstrapped Newtonian potential generated by a static spherically symmetric source in the surrounding vacuum. This metric contains post-Newtonian parameters which can be further used to constrain the complete underlying dynamical theory. For values of the post-Newto... |
2108.08068 | Gilberto Medeiros Kremer | Gilberto M. Kremer | Jeans instability in an expanding universe with dissipation | 6 pages, 2figures | International Journal of Modern Physics D Vol. 31, No. 6 (2022)
2250042 | 10.1142/S0218271822500420 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Jeans instability is analysed in an expanding universe within the framework
of BGK model of the Boltzmann equation and Poisson equations. The background is
characterized by a comoving Maxwellian distribution function and a space-time
Newtonian gravitational potential which satisfy the BGK model of the Boltzmann
and P... | [
{
"created": "Wed, 18 Aug 2021 09:36:16 GMT",
"version": "v1"
}
] | 2022-06-01 | [
[
"Kremer",
"Gilberto M.",
""
]
] | Jeans instability is analysed in an expanding universe within the framework of BGK model of the Boltzmann equation and Poisson equations. The background is characterized by a comoving Maxwellian distribution function and a space-time Newtonian gravitational potential which satisfy the BGK model of the Boltzmann and Poi... |
2310.07772 | Enrico Cannizzaro | Jacopo Lestingi, Enrico Cannizzaro and Paolo Pani | Extreme mass-ratio inspirals as probes of fundamental dipoles | 10 pages, 5 figures | null | null | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Even if globally neutral, in various scenarios compact objects can have a
nonvanishing dipole moment. Examples include neutron stars with magnetic
dipoles, black-hole microstates in the string-theory fuzzball scenario, and
classical black holes in modified theories of gravity with spin-induced
scalarization or Lorent... | [
{
"created": "Wed, 11 Oct 2023 18:00:08 GMT",
"version": "v1"
}
] | 2023-10-13 | [
[
"Lestingi",
"Jacopo",
""
],
[
"Cannizzaro",
"Enrico",
""
],
[
"Pani",
"Paolo",
""
]
] | Even if globally neutral, in various scenarios compact objects can have a nonvanishing dipole moment. Examples include neutron stars with magnetic dipoles, black-hole microstates in the string-theory fuzzball scenario, and classical black holes in modified theories of gravity with spin-induced scalarization or Lorentz-... |
1507.08755 | M.J. Luo | M.J.Luo | The Cosmological Constant Problem and Quantum Spacetime Reference Frame | 15 pages; v4: updated to the published version in IJMPD,
interpretation of NLSM being a theory of spacetime reference frame improved,
running dimension in renormalization of NLSM and asymptotic safety formally
demonstrated, limitations discussed, refs. added | Int. J. Mod. Phys. D Vol.27(2018)1850081 | 10.1142/S0218271818500815 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is a generalization of earlier papers [Nucl. Phys. B 884, 344
(2014) (arXiv:1312.2759) and JHEP 6, 63 (2015) (arXiv:1401.2488)]. We
generalize the idea of quantum clock time to quantum spacetime reference frame
via physical realization of a reference system by quantum rulers and clocks.
Omitting the intern... | [
{
"created": "Fri, 31 Jul 2015 05:19:58 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Nov 2015 07:40:49 GMT",
"version": "v2"
},
{
"created": "Fri, 20 May 2016 02:37:38 GMT",
"version": "v3"
},
{
"created": "Mon, 19 Mar 2018 07:42:49 GMT",
"version": "v4"
}
] | 2018-03-20 | [
[
"Luo",
"M. J.",
""
]
] | This paper is a generalization of earlier papers [Nucl. Phys. B 884, 344 (2014) (arXiv:1312.2759) and JHEP 6, 63 (2015) (arXiv:1401.2488)]. We generalize the idea of quantum clock time to quantum spacetime reference frame via physical realization of a reference system by quantum rulers and clocks. Omitting the internal... |
1312.7462 | Ujjal Debnath | Ujjal Debnath | Accretions of Various Types of Dark Energies onto Morris-Thorne Wormhole | 9 pages, 7 figures. arXiv admin note: text overlap with
arXiv:1112.6154 | null | 10.1140/epjc/s10052-014-2869-4 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we have studied accretion of the dark energies onto
Morris-Thorne wormhole. For quintessence like dark energy, the mass of the
wormhole decreases and phantom like dark energy, the mass of wormhole
increases. We have assumed two types of dark energy like variable modified
Chaplygin gas (VMCG) and general... | [
{
"created": "Sat, 28 Dec 2013 18:43:24 GMT",
"version": "v1"
}
] | 2015-06-18 | [
[
"Debnath",
"Ujjal",
""
]
] | In this work, we have studied accretion of the dark energies onto Morris-Thorne wormhole. For quintessence like dark energy, the mass of the wormhole decreases and phantom like dark energy, the mass of wormhole increases. We have assumed two types of dark energy like variable modified Chaplygin gas (VMCG) and generaliz... |
1103.2302 | Salvatore Capozziello | S. Capozziello and S. Vignolo | The Cauchy problem for f(R)-gravity: an overview | 14 pages | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the Cauchy problem for f(R) theories of gravity, in metric and
metric-affine for- mulations, pointing out analogies and differences with
respect to General Relativity. The role of conformal transformations, effective
scalar fields and sources in the field equations is discussed in view of the
well-posedness... | [
{
"created": "Fri, 11 Mar 2011 15:55:36 GMT",
"version": "v1"
}
] | 2011-03-14 | [
[
"Capozziello",
"S.",
""
],
[
"Vignolo",
"S.",
""
]
] | We review the Cauchy problem for f(R) theories of gravity, in metric and metric-affine for- mulations, pointing out analogies and differences with respect to General Relativity. The role of conformal transformations, effective scalar fields and sources in the field equations is discussed in view of the well-posedness o... |
1602.06810 | Ion I. Cotaescu | Ion I. Cotaescu | Canonical quantization of the covariant fields on de Sitter spacetimes | 41 pages no figures, some typos are corrected | null | 10.1142/S0217751X18300077 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The properties of the covariant quantum fields on de Sitter spacetimes are
investigated focusing on the isometry generators and Casimir operators in order
to establish the equivalence among the covariant representations and the
unitary irreducible ones of the de Sitter isometry group. For the Dirac quantum
field it i... | [
{
"created": "Mon, 22 Feb 2016 15:13:59 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Feb 2016 06:55:37 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Nov 2017 12:11:12 GMT",
"version": "v3"
},
{
"created": "Tue, 23 Jan 2018 06:35:37 GMT",
"version": "v4"
},
{
"c... | 2022-07-14 | [
[
"Cotaescu",
"Ion I.",
""
]
] | The properties of the covariant quantum fields on de Sitter spacetimes are investigated focusing on the isometry generators and Casimir operators in order to establish the equivalence among the covariant representations and the unitary irreducible ones of the de Sitter isometry group. For the Dirac quantum field it is ... |
gr-qc/9701064 | David Hochberg | David Hochberg, Arkadiy Popov and Sergey V. Sushkov | Self-consistent Wormhole Solutions of Semiclassical Gravity | 11 pages in plain LaTex. Four LaTex graphics files sent on request by
first author. Accepted for publication in Physical Review Letters | Phys.Rev.Lett. 78 (1997) 2050-2053 | 10.1103/PhysRevLett.78.2050 | LAEFF-96/25, KSPU-96-03 | gr-qc | null | We present the first results of a self-consistent solution of the
semiclassical Einstein field equations corresponding to a Lorentzian wormhole
coupled to a quantum scalar field. The specific solution presented here
represents a wormhole connecting two asymptotically spatially flat regions. In
general, the diameter o... | [
{
"created": "Thu, 30 Jan 1997 13:01:38 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Hochberg",
"David",
""
],
[
"Popov",
"Arkadiy",
""
],
[
"Sushkov",
"Sergey V.",
""
]
] | We present the first results of a self-consistent solution of the semiclassical Einstein field equations corresponding to a Lorentzian wormhole coupled to a quantum scalar field. The specific solution presented here represents a wormhole connecting two asymptotically spatially flat regions. In general, the diameter of ... |
0903.3645 | Christian Corda | Christian Corda and Herman J. Mosquera Cuesta | A spherically symmetric and stationary universe from a weak modification
of general relativity | Accepted for publication by Europhysics Letters | Europhys.Lett.86:20004,2009 | 10.1209/0295-5075/86/20004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that a weak modification of general relativity, in the linearized
approach, renders a spherically symmetric and stationary model of the universe.
This is due to the presence of a third mode of polarization in the linearized
gravity in which a "curvature" energy term is present. Such an energy can, in
prin... | [
{
"created": "Sat, 21 Mar 2009 09:00:03 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Apr 2009 05:43:09 GMT",
"version": "v2"
}
] | 2009-08-03 | [
[
"Corda",
"Christian",
""
],
[
"Cuesta",
"Herman J. Mosquera",
""
]
] | It is shown that a weak modification of general relativity, in the linearized approach, renders a spherically symmetric and stationary model of the universe. This is due to the presence of a third mode of polarization in the linearized gravity in which a "curvature" energy term is present. Such an energy can, in princi... |
gr-qc/0604115 | Steve Drasco | Steve Drasco | Strategies for observing extreme mass ratio inspirals | 17 pages, to appear in Classical and Quantum Gravity, minor edits to
first version along with a revamped appendix and figure 3. Final published
version | Class.Quant.Grav.23:S769-S784,2006 | 10.1088/0264-9381/23/19/S16 | null | gr-qc astro-ph | null | I review the status of research, conducted by a variety of independent
groups, aimed at the eventual observation of Extreme Mass Ratio Inspirals
(EMRIs) with gravitational wave detectors. EMRIs are binary systems in which
one of the objects is much more massive than the other, and which are in a
state of dynamical ev... | [
{
"created": "Thu, 27 Apr 2006 01:27:06 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Aug 2006 20:50:14 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Drasco",
"Steve",
""
]
] | I review the status of research, conducted by a variety of independent groups, aimed at the eventual observation of Extreme Mass Ratio Inspirals (EMRIs) with gravitational wave detectors. EMRIs are binary systems in which one of the objects is much more massive than the other, and which are in a state of dynamical evol... |
0704.0103 | Gianluca Gemelli | Gianluca Gemelli | Generalized regularly discontinuous solutions of the Einstein equations | 26 pages. | Int.J.Theor.Phys.46:3312-3330,2007 | 10.1007/s10773-007-9450-y | null | gr-qc | null | The physical consistency of the match of piecewise-$C^0$ metrics is
discussed. The mathematical theory of gravitational discontinuity hypersurfaces
is generalized to cover the match of regularly discontinuous metrics. The
mean-value differential geometry framework on a hypersurface is introduced, and
corresponding co... | [
{
"created": "Sun, 1 Apr 2007 19:43:30 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Gemelli",
"Gianluca",
""
]
] | The physical consistency of the match of piecewise-$C^0$ metrics is discussed. The mathematical theory of gravitational discontinuity hypersurfaces is generalized to cover the match of regularly discontinuous metrics. The mean-value differential geometry framework on a hypersurface is introduced, and corresponding comp... |
2004.02140 | Hamid Reza Sepangi | Mohaddese Heydari-Fard, Malihe Heydari-Fard, H. R. Sepangi | Bending of light in novel 4$D$ Gauss-Bonnet-de Sitter black holes by
Rindler-Ishak method | 10 pages, 1 figure. To appear in EPL | EPL, 133 (2021) 50006 | 10.1209/0295-5075/133/50006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the bending of light in the space-time of black holes in
four-dimensional Einstein-Gauss-Bonnet theory of gravity, recently proposed by
Glavan and Lin \cite{Glavan}. Using Rindler-Ishak method, the effect of
Gauss-Bonnet coupling on the bending angle is studied. We show that a positive
Gauss-Bonnet coupling ... | [
{
"created": "Sun, 5 Apr 2020 10:09:00 GMT",
"version": "v1"
},
{
"created": "Fri, 15 May 2020 08:49:55 GMT",
"version": "v2"
},
{
"created": "Sun, 26 Jul 2020 05:35:26 GMT",
"version": "v3"
},
{
"created": "Wed, 3 Mar 2021 16:14:59 GMT",
"version": "v4"
},
{
"cre... | 2021-05-26 | [
[
"Heydari-Fard",
"Mohaddese",
""
],
[
"Heydari-Fard",
"Malihe",
""
],
[
"Sepangi",
"H. R.",
""
]
] | We study the bending of light in the space-time of black holes in four-dimensional Einstein-Gauss-Bonnet theory of gravity, recently proposed by Glavan and Lin \cite{Glavan}. Using Rindler-Ishak method, the effect of Gauss-Bonnet coupling on the bending angle is studied. We show that a positive Gauss-Bonnet coupling gi... |
1606.00437 | Andy Bohn | Andy Bohn, Lawrence E. Kidder, Saul A. Teukolsky | A Parallel Adaptive Event Horizon Finder for Numerical Relativity | 16 pages, 12 figures | Phys. Rev. D 94, 064008 (2016) | 10.1103/PhysRevD.94.064008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With Advanced LIGO detecting the gravitational waves emitted from a pair of
merging black holes in late 2015, we have a new perspective into the strong
field regime of binary black hole systems. Event horizons are the defining
features of such black hole spacetimes. We introduce a new code for locating
event horizons... | [
{
"created": "Wed, 1 Jun 2016 20:00:03 GMT",
"version": "v1"
}
] | 2016-09-07 | [
[
"Bohn",
"Andy",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Teukolsky",
"Saul A.",
""
]
] | With Advanced LIGO detecting the gravitational waves emitted from a pair of merging black holes in late 2015, we have a new perspective into the strong field regime of binary black hole systems. Event horizons are the defining features of such black hole spacetimes. We introduce a new code for locating event horizons i... |
2107.04356 | Mostafa Bousder Mr | M. Bousder | A new constant behind the rotational velocity of galaxies | 13 pages, 1 figure | JCAP01(2022)015 | 10.1088/1475-7516/2022/01/015 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The present work is devoted to study the dynamical evolution of the galaxies
in scalar-GaussBonnet gravity in relationship with the MOND paradigm. This
study is useful for giving meaning to the presence of a new gravitational
constant. The stability of dark matter is strongly dependent on matter energy
density. We in... | [
{
"created": "Fri, 9 Jul 2021 10:48:50 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jan 2022 16:16:30 GMT",
"version": "v2"
},
{
"created": "Fri, 14 Jan 2022 22:01:28 GMT",
"version": "v3"
}
] | 2022-01-19 | [
[
"Bousder",
"M.",
""
]
] | The present work is devoted to study the dynamical evolution of the galaxies in scalar-GaussBonnet gravity in relationship with the MOND paradigm. This study is useful for giving meaning to the presence of a new gravitational constant. The stability of dark matter is strongly dependent on matter energy density. We inte... |
0705.0991 | Grigory Volovik | G.E. Volovik | From semiconductors to quantum gravity: to centenary of Matvei Bronstein | 14 pages, 2 figure, submitted to proceedings of the conference
devoted to centenary of Matvei Bronstein, St. Petersburg, November 2006,
typos corrected, references added | null | null | null | gr-qc cond-mat.str-el hep-ph physics.hist-ph | null | Investigation of the many-body condensed-matter systems allows us to connect
the microscopic physics at the atomic energy scale and the macroscopic physics
emerging in the low-energy corner. It gives some hints on the mechanisms of the
formation of the physical laws which our Universe obeys. The paper is devoted
to t... | [
{
"created": "Tue, 8 May 2007 15:01:29 GMT",
"version": "v1"
},
{
"created": "Tue, 15 May 2007 14:56:38 GMT",
"version": "v2"
},
{
"created": "Thu, 17 May 2007 15:38:15 GMT",
"version": "v3"
},
{
"created": "Fri, 18 May 2007 12:17:50 GMT",
"version": "v4"
}
] | 2007-05-23 | [
[
"Volovik",
"G. E.",
""
]
] | Investigation of the many-body condensed-matter systems allows us to connect the microscopic physics at the atomic energy scale and the macroscopic physics emerging in the low-energy corner. It gives some hints on the mechanisms of the formation of the physical laws which our Universe obeys. The paper is devoted to the... |
1301.2190 | Antonio Jes\'us L\'opez Revelles | Antonio Jes\'us L\'opez-Revelles | Reconstructing cosmic acceleration from f(R) modified gravity | 3 pages. Contribution to the Proceedings of the Spanish Relativity
Meeting (ERE) 2011, Madrid, Spain | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A variant of the accelerating cosmology reconstruction program is developed
for $f(R)$ gravity. Reconstruction schemes in terms of e-foldings and by using
an auxiliary scalar field are developed. An example of a model with a transient
phantom behavior without real matter is explicitly discussed in both schemes.
Detai... | [
{
"created": "Thu, 10 Jan 2013 17:12:04 GMT",
"version": "v1"
}
] | 2013-01-11 | [
[
"López-Revelles",
"Antonio Jesús",
""
]
] | A variant of the accelerating cosmology reconstruction program is developed for $f(R)$ gravity. Reconstruction schemes in terms of e-foldings and by using an auxiliary scalar field are developed. An example of a model with a transient phantom behavior without real matter is explicitly discussed in both schemes. Detaile... |
2206.12843 | Mohsen Khodadi | Mohsen Khodadi and Javad T. Firouzjaee | A Survey of Strong Cosmic Censorship Conjecture Beyond Einstein's
Gravity | 17 pages, 6 figures | Phys.Dark Univ. 37 (2022) 101084 | 10.1016/j.dark.2022.101084 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The strong cosmic censorship conjecture (SCCC) proposed by Penrose states
that the presence of the inner Cauchy horizon ($\mathcal{CH}$) in the black
hole solutions does not threaten the deterministic nature of general relativity
since it is actually unstable against the remnant perturbation fields that fall
into the... | [
{
"created": "Sun, 26 Jun 2022 11:10:01 GMT",
"version": "v1"
}
] | 2022-07-08 | [
[
"Khodadi",
"Mohsen",
""
],
[
"Firouzjaee",
"Javad T.",
""
]
] | The strong cosmic censorship conjecture (SCCC) proposed by Penrose states that the presence of the inner Cauchy horizon ($\mathcal{CH}$) in the black hole solutions does not threaten the deterministic nature of general relativity since it is actually unstable against the remnant perturbation fields that fall into the b... |
gr-qc/9408010 | null | E. Calzetta and C. El Hasi | Nontrivial Dynamics in the Early Stages of Inflation | 26 pages, Latex, 9 Figures available on request, GTCRG-94-12 | Phys.Rev. D51 (1995) 2713-2728 | 10.1103/PhysRevD.51.2713 | null | gr-qc | null | Inflationary cosmologies, regarded as dynamical systems, have rather simple
asymptotic behavior, insofar as the cosmic baldness principle holds.
Nevertheless, in the early stages of an inflationary process, the dynamical
behavior may be very complex. In this paper, we show how even a simple
inflationary scenario, bas... | [
{
"created": "Fri, 5 Aug 1994 14:15:00 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Calzetta",
"E.",
""
],
[
"Hasi",
"C. El",
""
]
] | Inflationary cosmologies, regarded as dynamical systems, have rather simple asymptotic behavior, insofar as the cosmic baldness principle holds. Nevertheless, in the early stages of an inflationary process, the dynamical behavior may be very complex. In this paper, we show how even a simple inflationary scenario, based... |
2008.06095 | Arnab Sarkar | Arnab Sarkar, Amna Ali and Salah Nasri | Perturbative correction terms to electromagnetic self-force due to
metric perturbation : astrophysical and cosmological implications | 15 pages | Eur. Phys. J. C (2021) 81:725 | 10.1140/epjc/s10052-021-09485-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the equation of motion of a charged particle or a charged compact
object in curved space-time, under the reaction of electromagnetic radiation
and also consider a physical situation such that the charged particle or
compact object emits gravitational radiation, thereby gravitational radiation
reaction als... | [
{
"created": "Thu, 13 Aug 2020 20:04:14 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Mar 2021 20:52:08 GMT",
"version": "v2"
},
{
"created": "Thu, 12 Aug 2021 21:27:22 GMT",
"version": "v3"
}
] | 2021-08-16 | [
[
"Sarkar",
"Arnab",
""
],
[
"Ali",
"Amna",
""
],
[
"Nasri",
"Salah",
""
]
] | We consider the equation of motion of a charged particle or a charged compact object in curved space-time, under the reaction of electromagnetic radiation and also consider a physical situation such that the charged particle or compact object emits gravitational radiation, thereby gravitational radiation reaction also ... |
gr-qc/0508045 | Matt Visser | Celine Cattoen (Victoria University of Wellington), Matt Visser
(Victoria University of Wellington) | Necessary and sufficient conditions for big bangs, bounces, crunches,
rips, sudden singularities, and extremality events | 20 pages, uses iopart.cls; several references added | Class.Quant.Grav. 22 (2005) 4913-4930 | 10.1088/0264-9381/22/23/001 | null | gr-qc astro-ph | null | The physically relevant singularities occurring in FRW cosmologies had
traditionally been thought to be limited to the "big bang", and possibly a "big
crunch". However, over the last few years, the zoo of cosmological
singularities considered in the literature has become considerably more
extensive, with "big rips" a... | [
{
"created": "Thu, 11 Aug 2005 04:49:42 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Aug 2005 04:11:11 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Cattoen",
"Celine",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | The physically relevant singularities occurring in FRW cosmologies had traditionally been thought to be limited to the "big bang", and possibly a "big crunch". However, over the last few years, the zoo of cosmological singularities considered in the literature has become considerably more extensive, with "big rips" and... |
1903.11128 | Cristian Erices | Cristian Erices, Eleftherios Papantonopoulos and Emmanuel N. Saridakis | Cosmology in cubic and $f(P)$ gravity | 10 pages, 3 figures | Phys. Rev. D 99, 123527 (2019) | 10.1103/PhysRevD.99.123527 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct cubic gravity and its $f(P)$ extension and we investigate their
early- and late-time cosmological applications. Cubic gravity is based on a
particular invariant $P$, constructed from cubic contractions of the Riemann
tensor, under three requirements: (i) the resulting theory possesses a spectrum
identica... | [
{
"created": "Tue, 26 Mar 2019 19:30:27 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Jul 2019 17:07:40 GMT",
"version": "v2"
}
] | 2019-07-08 | [
[
"Erices",
"Cristian",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | We construct cubic gravity and its $f(P)$ extension and we investigate their early- and late-time cosmological applications. Cubic gravity is based on a particular invariant $P$, constructed from cubic contractions of the Riemann tensor, under three requirements: (i) the resulting theory possesses a spectrum identical ... |
1606.07210 | Tomer Shushi | Tomer Shushi | Particles as superoscillations of spacetime with a nonlocal metric? | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Einstein field equations show how matter curve spacetime, but, does curved
spacetime creates matter? And if so, can we have geometrical foundations to
every matter in the universe? In this note, we suggest an approach to derive
non-general relativistic dynamics of particles as curvatures of spacetime under
the assump... | [
{
"created": "Thu, 23 Jun 2016 07:21:03 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jun 2016 09:05:43 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Nov 2016 09:05:35 GMT",
"version": "v3"
},
{
"created": "Thu, 23 May 2019 17:40:44 GMT",
"version": "v4"
}
] | 2019-05-24 | [
[
"Shushi",
"Tomer",
""
]
] | Einstein field equations show how matter curve spacetime, but, does curved spacetime creates matter? And if so, can we have geometrical foundations to every matter in the universe? In this note, we suggest an approach to derive non-general relativistic dynamics of particles as curvatures of spacetime under the assumpti... |
2103.07794 | Alexei Deriglazov A | Alexei A. Deriglazov | Massless polarized particle and Faraday rotation of light in the
Schwarzschild spacetime | 13+7 pages, misprints corrected, minor edits | Phys. Rev. D 104, 025006 (2021) | 10.1103/PhysRevD.104.025006 | null | gr-qc hep-th math-ph math.MP physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the manifestly covariant Lagrangian of a massless polarized
particle, that implies all dynamic and algebraic equations as the conditions of
extreme of this variational problem. The model allows for minimal interaction
with a gravitational field, leading to the equations, coinciding with Maxwell
equations i... | [
{
"created": "Sat, 13 Mar 2021 21:18:32 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Mar 2021 23:53:12 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Apr 2021 20:38:46 GMT",
"version": "v3"
},
{
"created": "Mon, 26 Apr 2021 15:14:24 GMT",
"version": "v4"
}
] | 2021-07-14 | [
[
"Deriglazov",
"Alexei A.",
""
]
] | We present the manifestly covariant Lagrangian of a massless polarized particle, that implies all dynamic and algebraic equations as the conditions of extreme of this variational problem. The model allows for minimal interaction with a gravitational field, leading to the equations, coinciding with Maxwell equations in ... |
1805.01882 | Philippe Landry | Philippe Landry | Rotational-tidal phasing of the binary neutron star waveform | 10 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Tidal forces cause inspiralling binary neutron stars to deform, leaving a
measurable imprint on the gravitational waves they emit. The induced stellar
multipoles are an added source of gravitational radiation and modify the
orbital dynamics, producing a slight acceleration of the coalescence which
manifests as a phas... | [
{
"created": "Fri, 4 May 2018 17:53:40 GMT",
"version": "v1"
}
] | 2018-05-07 | [
[
"Landry",
"Philippe",
""
]
] | Tidal forces cause inspiralling binary neutron stars to deform, leaving a measurable imprint on the gravitational waves they emit. The induced stellar multipoles are an added source of gravitational radiation and modify the orbital dynamics, producing a slight acceleration of the coalescence which manifests as a phase ... |
1301.5971 | Kazunari Eda | Kazunari Eda, Yousuke Itoh, Sachiko Kuroyanagi, Joseph Silk | A new probe of dark matter properties: gravitational waves from an
intermediate mass black hole embedded in a dark matter mini-spike | 6 pages,3 figures | Phys. Rev. Lett. 110, 221101 (2013) [5 pages] | 10.1103/PhysRevLett.110.221101 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An intermediate mass black hole (IMBH) may have a dark matter (DM) mini-halo
around it and develop a spiky structure within less than a parsec from the
IMBH. When a stellar mass object is captured by the mini-halo, it eventually
infalls into such an IMBH due to gravitational wave back reaction which in turn
could be ... | [
{
"created": "Fri, 25 Jan 2013 07:01:20 GMT",
"version": "v1"
},
{
"created": "Fri, 31 May 2013 08:35:41 GMT",
"version": "v2"
}
] | 2013-06-03 | [
[
"Eda",
"Kazunari",
""
],
[
"Itoh",
"Yousuke",
""
],
[
"Kuroyanagi",
"Sachiko",
""
],
[
"Silk",
"Joseph",
""
]
] | An intermediate mass black hole (IMBH) may have a dark matter (DM) mini-halo around it and develop a spiky structure within less than a parsec from the IMBH. When a stellar mass object is captured by the mini-halo, it eventually infalls into such an IMBH due to gravitational wave back reaction which in turn could be ob... |
2310.01241 | Volodymyr Gorkavenko | E. V. Gorbar, T. V. Gorkavenko, V. M. Gorkavenko, O. M. Teslyk | Magnetogenesis in non-local models during inflation | 7 pages | Ukr. J. Phys. 2023, Vol.68 (10), 647-651 | 10.15407/ujpe68.10.647 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The generation of magnetic fields during inflation in an electromagnetic
model with a non-local form factor in Maxwell`s action is studied. The
equations of motion for the electromagnetic field are derived and solved. It is
found that the conformal symmetry breaking due to the non-local form factor
does not lead to t... | [
{
"created": "Mon, 2 Oct 2023 14:27:54 GMT",
"version": "v1"
}
] | 2023-11-28 | [
[
"Gorbar",
"E. V.",
""
],
[
"Gorkavenko",
"T. V.",
""
],
[
"Gorkavenko",
"V. M.",
""
],
[
"Teslyk",
"O. M.",
""
]
] | The generation of magnetic fields during inflation in an electromagnetic model with a non-local form factor in Maxwell`s action is studied. The equations of motion for the electromagnetic field are derived and solved. It is found that the conformal symmetry breaking due to the non-local form factor does not lead to the... |
1610.02745 | Wei-Tou Ni | Wei-Tou Ni | On spacetime structure and electrodynamics | 32 pages, 2 tables, review for the special issue on "Spacetime
Structure and Electrodynamics" of International Journal of Modern Physics D,
Vol. 25, No.14 (2016). arXiv admin note: substantial text overlap with
arXiv:1512.08426 | International Journal of Modern Physics D, Vol. 25, No. 11 (2016)
1603001 (35 pages) | 10.1142/S0218271816030012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Since almost all phenomena electrodynamics deal with have energy scales much
lower than the Higgs mass energy and intermediate boson energy, electrodynamics
of continuous media should be applicable and the constitutive relation of
spacetime/vacuum should be local and linear. What is the key characteristic of
the spac... | [
{
"created": "Mon, 10 Oct 2016 01:00:30 GMT",
"version": "v1"
}
] | 2016-12-06 | [
[
"Ni",
"Wei-Tou",
""
]
] | Since almost all phenomena electrodynamics deal with have energy scales much lower than the Higgs mass energy and intermediate boson energy, electrodynamics of continuous media should be applicable and the constitutive relation of spacetime/vacuum should be local and linear. What is the key characteristic of the spacet... |
1611.03734 | Vladimir Koutvitsky | Vladimir A. Koutvitsky, Eugene M. Maslov | On the oscillation-driven cosmological expansion at the post-inflation
stage | 8 pages, 4 figures | null | 10.1134/S0202289317010078 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamics of the inflaton scalar field oscillating around a minimum of the
singular potentials in the expanding Universe is investigated. Asymptotic
formulas are obtained describing the cosmological expansion at the late times.
The problem of stability of the oscillations considered and the related
phenomenon of the f... | [
{
"created": "Thu, 10 Nov 2016 13:39:44 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Dec 2016 10:32:09 GMT",
"version": "v2"
}
] | 2017-03-22 | [
[
"Koutvitsky",
"Vladimir A.",
""
],
[
"Maslov",
"Eugene M.",
""
]
] | Dynamics of the inflaton scalar field oscillating around a minimum of the singular potentials in the expanding Universe is investigated. Asymptotic formulas are obtained describing the cosmological expansion at the late times. The problem of stability of the oscillations considered and the related phenomenon of the fie... |
1201.6145 | Roberto Casadio | R. Casadio, J. Ovalle | Brane-world stars and (microscopic) black holes | LaTeX, 11 pages, 2 figures. Final version to appear in PLB | null | 10.1016/j.physletb.2012.07.041 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study stars in the brane-world by employing the principle of minimal
geometric deformation and find that brane-world black hole metrics with a tidal
charge are consistently recovered in a suitable limit. This procedure allows us
to determine the tidal charge as a function of the black hole ADM mass (and
brane tens... | [
{
"created": "Mon, 30 Jan 2012 09:50:04 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Jul 2012 15:03:30 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Casadio",
"R.",
""
],
[
"Ovalle",
"J.",
""
]
] | We study stars in the brane-world by employing the principle of minimal geometric deformation and find that brane-world black hole metrics with a tidal charge are consistently recovered in a suitable limit. This procedure allows us to determine the tidal charge as a function of the black hole ADM mass (and brane tensio... |
1409.5176 | Arman Akbarian | Arman Akbarian, Matthew W. Choptuik | Critical collapse in the spherically-symmetric Einstein-Vlasov model | 17 pages, 12 figures | Phys. Rev. D 90, 104023 (2014) | 10.1103/PhysRevD.90.104023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We solve the coupled Einstein-Vlasov system in spherical symmetry using
direct numerical integration of the Vlasov equation in phase space. Focusing on
the case of massless particles we study critical phenomena in the model,
finding strong evidence for generic type I behaviour at the black hole
threshold that paralle... | [
{
"created": "Thu, 18 Sep 2014 02:09:46 GMT",
"version": "v1"
}
] | 2014-11-26 | [
[
"Akbarian",
"Arman",
""
],
[
"Choptuik",
"Matthew W.",
""
]
] | We solve the coupled Einstein-Vlasov system in spherical symmetry using direct numerical integration of the Vlasov equation in phase space. Focusing on the case of massless particles we study critical phenomena in the model, finding strong evidence for generic type I behaviour at the black hole threshold that parallels... |
1112.5344 | Emanuel Gallo | Emanuel Gallo and Osvaldo M. Moreschi | New derivation for the equations of motion for particles in
electromagnetism | 11 pages, 2 figures. Minor changes. Closer to published version | Phys. Rev. D 85, 065005 (2012) | 10.1103/PhysRevD.85.065005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present equations of motion for charged particles using balanced
equations, and without introducing explicitly divergent quantities. This
derivation contains as particular cases some well known equations of motion, as
the Lorentz-Dirac equations. An study of our main equations in terms of order
of the interaction ... | [
{
"created": "Thu, 22 Dec 2011 15:07:51 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Mar 2012 14:35:34 GMT",
"version": "v2"
}
] | 2012-03-08 | [
[
"Gallo",
"Emanuel",
""
],
[
"Moreschi",
"Osvaldo M.",
""
]
] | We present equations of motion for charged particles using balanced equations, and without introducing explicitly divergent quantities. This derivation contains as particular cases some well known equations of motion, as the Lorentz-Dirac equations. An study of our main equations in terms of order of the interaction wi... |
1904.09558 | Alessandro Nagar | Francesco Messina, Reetika Dudi, Alessandro Nagar and Sebastiano
Bernuzzi | Quasi-5.5PN TaylorF2 approximant for compact binaries: point-mass
phasing and impact on the tidal polarizability inference | 13 pages, 7 figures, submitted to Phys. Rev. D | Phys. Rev. D 99, 124051 (2019) | 10.1103/PhysRevD.99.124051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a point-mass (nonspinning) frequency-domain TaylorF2 phasing
approximant at quasi-5.5 post-Newtonian (PN) accuracy for the gravitational
wave from coalescing compact binaries. The new approximant is obtained by
Taylor-expanding the effective-one-body (EOB) resummed energy and and angular
momentum flux along... | [
{
"created": "Sun, 21 Apr 2019 07:31:08 GMT",
"version": "v1"
}
] | 2019-07-03 | [
[
"Messina",
"Francesco",
""
],
[
"Dudi",
"Reetika",
""
],
[
"Nagar",
"Alessandro",
""
],
[
"Bernuzzi",
"Sebastiano",
""
]
] | We derive a point-mass (nonspinning) frequency-domain TaylorF2 phasing approximant at quasi-5.5 post-Newtonian (PN) accuracy for the gravitational wave from coalescing compact binaries. The new approximant is obtained by Taylor-expanding the effective-one-body (EOB) resummed energy and and angular momentum flux along c... |
gr-qc/9706047 | Madore | J. Madore | Fuzzy Surfaces of Genus Zero | 11 pages, Latex | Class.Quant.Grav. 14 (1997) 3303-3312; Erratum-ibid. 15 (1998) 479 | 10.1088/0264-9381/14/12/014 | Orsay Preprint 97/26 | gr-qc hep-th | null | A fuzzy version of the ordinary round 2-sphere has been constructed with an
invariant curvature. We here consider linear connections on arbitrary fuzzy
surfaces of genus zero. We shall find as before that they are more or less
rigidly dependent on the differential calculus used but that a large number of
the latter c... | [
{
"created": "Mon, 16 Jun 1997 13:55:54 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Madore",
"J.",
""
]
] | A fuzzy version of the ordinary round 2-sphere has been constructed with an invariant curvature. We here consider linear connections on arbitrary fuzzy surfaces of genus zero. We shall find as before that they are more or less rigidly dependent on the differential calculus used but that a large number of the latter can... |
2009.12826 | Ahmad Sheykhi | Ahmad Sheykhi | Mimetic gravity in $(2+1)$-dimensions | 18 pages, 8 figures | JHEP 01 (2021) 043 | 10.1007/JHEP01(2021)043 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | One of the most important achievements in general relativity has been
discovery of the $(2+1)$-dimensional black hole solutions of Einstein gravity
in anti-de Sitter (AdS) spacetime [Phys. Rev. Lett. {\bf69}, 1849 (1992)]. In
this paper, we construct, for the first time, the $(2+1)$-dimensional solutions
of mimetic t... | [
{
"created": "Sun, 27 Sep 2020 12:08:36 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Feb 2021 18:58:38 GMT",
"version": "v2"
}
] | 2021-02-12 | [
[
"Sheykhi",
"Ahmad",
""
]
] | One of the most important achievements in general relativity has been discovery of the $(2+1)$-dimensional black hole solutions of Einstein gravity in anti-de Sitter (AdS) spacetime [Phys. Rev. Lett. {\bf69}, 1849 (1992)]. In this paper, we construct, for the first time, the $(2+1)$-dimensional solutions of mimetic the... |
1104.0346 | Guillermo A. Gonzalez | Guillermo A. Gonz\'alez and Framsol L\'opez-Suspes | Stability of equatorial circular geodesics in static axially symmetric
spacetimes | 13 pages, 10 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general study of the stability of equatorial circular orbits in static
axially symmetric gravitating systems is presented. Important circular
geodesics as the marginally stable orbit, the marginally bounded orbit and the
photon orbit are analyzed. We found general expressions for the radius,
specific energy, specif... | [
{
"created": "Sun, 3 Apr 2011 02:59:35 GMT",
"version": "v1"
}
] | 2011-04-05 | [
[
"González",
"Guillermo A.",
""
],
[
"López-Suspes",
"Framsol",
""
]
] | A general study of the stability of equatorial circular orbits in static axially symmetric gravitating systems is presented. Important circular geodesics as the marginally stable orbit, the marginally bounded orbit and the photon orbit are analyzed. We found general expressions for the radius, specific energy, specific... |
gr-qc/0111056 | Takashi Tamaki | Takashi Tamaki, Tomohiro Harada, Umpei Miyamoto (Waseda University)
and Takashi Torii (University of Tokyo) | Have we already detected astrophysical symptoms of space-time
noncommutativity ? | 10 pages, 6 figures, submitted to PRD, corrected some mistakes | Phys.Rev. D65 (2002) 083003 | 10.1103/PhysRevD.65.083003 | null | gr-qc astro-ph hep-ph hep-th | null | We discuss astrophysical implications of $\kappa$-Minkowski space-time, in
which there appears space-time noncommutativity. We first derive a velocity
formula for particles based on the motion of a wave packet. The result is that
a massless particle moves at a constant speed as in the usual Minkowski
space-time, whic... | [
{
"created": "Sun, 18 Nov 2001 04:23:49 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Dec 2001 11:58:49 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Tamaki",
"Takashi",
"",
"Waseda University"
],
[
"Harada",
"Tomohiro",
"",
"Waseda University"
],
[
"Miyamoto",
"Umpei",
"",
"Waseda University"
],
[
"Torii",
"Takashi",
"",
"University of Tokyo"
]
] | We discuss astrophysical implications of $\kappa$-Minkowski space-time, in which there appears space-time noncommutativity. We first derive a velocity formula for particles based on the motion of a wave packet. The result is that a massless particle moves at a constant speed as in the usual Minkowski space-time, which ... |
gr-qc/0511072 | G. S. Bisnovatyi-Kogan | G.S. Bisnovatyi-Kogan | Checking the variability of the gravitational constant with binary
pulsars | Submitted to Journal | Int.J.Mod.Phys.D15:1047-1052,2006 | 10.1142/S0218271806008747 | null | gr-qc astro-ph physics.space-ph | null | The most precise measurements are done at present by timing of radiopulsars
in binary systems with two neutron stars. The timing measurements of the
Taylor-Hulse pulsar B1913+16 gave the most precise results on testing of
general relativity (GR), finding implicit proof of existence of gravitational
waves. We show tha... | [
{
"created": "Mon, 14 Nov 2005 13:37:52 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Jan 2006 18:49:26 GMT",
"version": "v2"
},
{
"created": "Sun, 26 Feb 2006 10:53:35 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Bisnovatyi-Kogan",
"G. S.",
""
]
] | The most precise measurements are done at present by timing of radiopulsars in binary systems with two neutron stars. The timing measurements of the Taylor-Hulse pulsar B1913+16 gave the most precise results on testing of general relativity (GR), finding implicit proof of existence of gravitational waves. We show that ... |
gr-qc/9805011 | Kiyoshi Shiraishi | Yoshitaka Degura, Kenji Sakamoto, and Kiyoshi Shiraishi (Yamaguchi
University) | Black Holes with Scalar Hair in (2+1) dimensions | 17 pages, 11 figures, RevTeX 3.0, fixed figures | Grav.Cosmol. 7 (2001) 153-158 | null | Guchi-TP-001 | gr-qc | null | Nonrotating and rotating black hole soltuions in (2+1) dimensions are studied
in a model including a real scalar field with a simple potential coupled to
gravity.
| [
{
"created": "Tue, 5 May 1998 13:32:16 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Jun 1998 04:49:54 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Degura",
"Yoshitaka",
"",
"Yamaguchi\n University"
],
[
"Sakamoto",
"Kenji",
"",
"Yamaguchi\n University"
],
[
"Shiraishi",
"Kiyoshi",
"",
"Yamaguchi\n University"
]
] | Nonrotating and rotating black hole soltuions in (2+1) dimensions are studied in a model including a real scalar field with a simple potential coupled to gravity. |
gr-qc/0006070 | Pasi Repo | J. Makela, P. Repo | Microscopic Black Hole Pairs in Highly-Excited States | 22 pages, 3 figures, uses RevTex | Class.Quant.Grav. 18 (2001) 373-394 | 10.1088/0264-9381/18/3/302 | null | gr-qc | null | We consider the quantum mechanics of a system consisting of two identical,
Planck-size Schwarzschild black holes revolving around their common center of
mass. We find that even in a very highly-excited state such a system has very
sharp, discrete energy eigenstates, and the system performs very rapid
transitions from... | [
{
"created": "Tue, 20 Jun 2000 10:42:12 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Makela",
"J.",
""
],
[
"Repo",
"P.",
""
]
] | We consider the quantum mechanics of a system consisting of two identical, Planck-size Schwarzschild black holes revolving around their common center of mass. We find that even in a very highly-excited state such a system has very sharp, discrete energy eigenstates, and the system performs very rapid transitions from a... |
2403.17718 | Rafael Santos | Rafael M. Santos and Rafael C. Nunes and Jose C. N. de Araujo | Testing beyond-Kerr spacetimes with GWTC-3 | 8 pages, 4 figures | Eur.Phys.J.C 84 (2024) 302 | 10.1140/epjc/s10052-024-12666-0 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The Kerr spacetime is a fundamental solution of general relativity (GR),
describing the gravitational field around a rotating, uncharged black hole
(BH). Kerr spacetime has been crucial in modern astrophysics and it serves as a
foundation for the study of gravitational waves (GWs). Possible deviations in
Kerr geometr... | [
{
"created": "Tue, 26 Mar 2024 14:00:45 GMT",
"version": "v1"
}
] | 2024-03-27 | [
[
"Santos",
"Rafael M.",
""
],
[
"Nunes",
"Rafael C.",
""
],
[
"de Araujo",
"Jose C. N.",
""
]
] | The Kerr spacetime is a fundamental solution of general relativity (GR), describing the gravitational field around a rotating, uncharged black hole (BH). Kerr spacetime has been crucial in modern astrophysics and it serves as a foundation for the study of gravitational waves (GWs). Possible deviations in Kerr geometry ... |
gr-qc/9704044 | Andrzey Krolak | Andrzej Kr\'olak (Max Planck Institute for Gravitational Physics, The
Albert Einstein Institute, Potsdam, Germany On leave of absence from
Institute of Mathematics, Polish Academy of Sciences, Warsaw, Poland) | Estimation of Parameters of Gravitational Waves from Pulsars | 6 pages, Latex, 1 figure, moriond.sty macro | null | null | null | gr-qc | null | The problem of search for nearly periodic gravitational wave sources in the
data from laser interferometric detectors is discussed using a simple model of
the signal. Accuracies of estimation of the parameters and computational
requirements to do the search are assessed.
| [
{
"created": "Tue, 15 Apr 1997 12:20:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Królak",
"Andrzej",
"",
"Max Planck Institute for Gravitational Physics, The\n Albert Einstein Institute, Potsdam, Germany On leave of absence from\n Institute of Mathematics, Polish Academy of Sciences, Warsaw, Poland"
]
] | The problem of search for nearly periodic gravitational wave sources in the data from laser interferometric detectors is discussed using a simple model of the signal. Accuracies of estimation of the parameters and computational requirements to do the search are assessed. |
gr-qc/0506058 | Tania Regimbau | T. Regimbau, J.A. de Freitas Pacheco, A. Spallicci and S. Vincent | Expected Coalescence Rate of Double Neutron Stars for Ground Based
Interferometers | talk given at the GWDAW9 (Annecy, 2004) to be published in CQG | Class.Quant.Grav. 22 (2005) S935-S942 | 10.1088/0264-9381/22/18/S07 | null | gr-qc astro-ph | null | In this paper we present new estimates of the coalescence rate of neutron
star binaries in the local universe and we discuss its consequences for the
first generations of ground based interferometers. Our approach based on both
evolutionary and statistical methods gives a galactic merging rate of 1.7
10$^{-5}$ yr$^{-... | [
{
"created": "Thu, 9 Jun 2005 21:45:56 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Jun 2005 17:07:20 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Regimbau",
"T.",
""
],
[
"Pacheco",
"J. A. de Freitas",
""
],
[
"Spallicci",
"A.",
""
],
[
"Vincent",
"S.",
""
]
] | In this paper we present new estimates of the coalescence rate of neutron star binaries in the local universe and we discuss its consequences for the first generations of ground based interferometers. Our approach based on both evolutionary and statistical methods gives a galactic merging rate of 1.7 10$^{-5}$ yr$^{-1}... |
1911.09149 | Gonzalo Quiroga | C. N. Kozameh, J. I. Nieva, and G. D. Quiroga | A relativistic center of mass in general relativity | null | Phys. Rev. D 101, 024028 (2020) | 10.1103/PhysRevD.101.024028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The center of mass and spin for isolated sources of gravitational radiation
that move at relativistic speeds are defined. As a first step, we also present
these definitions in flat space. This contradicts some general wisdom given in
textbooks claiming that such definitions are not covariant and thus, have no
physica... | [
{
"created": "Wed, 20 Nov 2019 20:00:50 GMT",
"version": "v1"
}
] | 2020-01-15 | [
[
"Kozameh",
"C. N.",
""
],
[
"Nieva",
"J. I.",
""
],
[
"Quiroga",
"G. D.",
""
]
] | The center of mass and spin for isolated sources of gravitational radiation that move at relativistic speeds are defined. As a first step, we also present these definitions in flat space. This contradicts some general wisdom given in textbooks claiming that such definitions are not covariant and thus, have no physical ... |
2402.11914 | Vadim Oshurko | V.G.Krechet (1), V.B.Oshurko (1 and 2), A.E.Kisser (1) ((1) Moscow
State Technological University Stankin, (2) Prokhorov General Physics
Institute of Russian Academy of Sciences) | Dynamics of spining particles in a homogeneous space with rotation as
possible mechanism of the inertial mass formation and interpretation of
quantum uncertainty principle in general relativity | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The dynamics of particles with intrinsic angular momentum (spin) described by
the Dirac equation is considered in a homogeneous space with rotation in the
presence of a homogeneous vortex gravitational field. The effects of the
interaction between the spin of Dirac particles and the vortex gravitational
field, as wel... | [
{
"created": "Mon, 19 Feb 2024 07:59:20 GMT",
"version": "v1"
}
] | 2024-02-20 | [
[
"Krechet",
"V. G.",
"",
"1 and 2"
],
[
"Oshurko",
"V. B.",
"",
"1 and 2"
],
[
"Kisser",
"A. E.",
""
]
] | The dynamics of particles with intrinsic angular momentum (spin) described by the Dirac equation is considered in a homogeneous space with rotation in the presence of a homogeneous vortex gravitational field. The effects of the interaction between the spin of Dirac particles and the vortex gravitational field, as well ... |
1412.4362 | Dah-Wei Chiou | Dah-Wei Chiou | Loop Quantum Gravity | Invited review article. A large part based on arXiv:gr-qc/0404018 by
A. Ashtekar and J. Lewandowski and "Quantum Gravity" by C. Rovelli. To appear
in Int. J. Mod. Phys. D and in "One Hundred Years of General Relativity:
Cosmology and Gravity," edited by Wei-Tou Ni (World Scientific, Singapore,
2015) | Int. J. Mod. Phys. D, Vol. 24, No. 1 (2015) 1530005 | 10.1142/S0218271815300050 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article presents an "in-a-nutshell" yet self-contained introductory
review on loop quantum gravity (LQG) -- a background-independent,
nonperturbative approach to a consistent quantum theory of gravity. Instead of
rigorous and systematic derivations, it aims to provide a general picture of
LQG, placing emphasis o... | [
{
"created": "Sun, 14 Dec 2014 14:15:25 GMT",
"version": "v1"
}
] | 2014-12-30 | [
[
"Chiou",
"Dah-Wei",
""
]
] | This article presents an "in-a-nutshell" yet self-contained introductory review on loop quantum gravity (LQG) -- a background-independent, nonperturbative approach to a consistent quantum theory of gravity. Instead of rigorous and systematic derivations, it aims to provide a general picture of LQG, placing emphasis on ... |
gr-qc/9408012 | P. Huebner | Peter Huebner | General Relativistic Scalar Field Models in the Large | 22 pages, latex, AGG 19 | null | 10.1088/0264-9381/12/3/016 | null | gr-qc | null | For a class of scalar fields including the massless Klein-Gordon field the
general relativistic hyperboloidal initial value problems are equivalent in a
certain sense. By using this equivalence and conformal techniques it is proven
that the hyperboloidal initial value problem for those scalar fields has an
unique sol... | [
{
"created": "Wed, 10 Aug 1994 10:01:48 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Huebner",
"Peter",
""
]
] | For a class of scalar fields including the massless Klein-Gordon field the general relativistic hyperboloidal initial value problems are equivalent in a certain sense. By using this equivalence and conformal techniques it is proven that the hyperboloidal initial value problem for those scalar fields has an unique solut... |
1610.09961 | Abdul Jawad | Abdul Jawad and Ayesha Iqbal | Viscous Chaplygin Gas Models as a Spherical Top-Hat Collapsing Fluids | 19 pages; 12 figures. arXiv admin note: text overlap with
arXiv:1110.6205, arXiv:1501.00486 by other authors | Int. J. Mod. Phys. D 25(2016)1650074 | 10.1142/S0218271816500747 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the spherical top-hat collapse in Einstein gravity and loop quantum
cosmology by taking the non-linear evolution of viscous modified variable
chaplygin gas and viscous generalized cosmic chaplygin gas. We calculate the
equation of state parameter, square speed of sound, perturbed equation of state
parameter,... | [
{
"created": "Mon, 31 Oct 2016 15:00:51 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Jawad",
"Abdul",
""
],
[
"Iqbal",
"Ayesha",
""
]
] | We study the spherical top-hat collapse in Einstein gravity and loop quantum cosmology by taking the non-linear evolution of viscous modified variable chaplygin gas and viscous generalized cosmic chaplygin gas. We calculate the equation of state parameter, square speed of sound, perturbed equation of state parameter, p... |
1108.0116 | Andrew DeBenedictis | Andrew DeBenedictis | Anisotropic Structures and Wormholes with Loop Quantum Gravity Holonomy
Corrections | 20 pages, 6 figures. New version has updated references, minor
corrections and more comments regarding the interpretation of the results.
Accepted for publication in Physical Review D | Phys.Rev.D84:104030,2011 | 10.1103/PhysRevD.84.104030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Anisotropic spherically symmetric systems are studied in the connection and
densitized triad variables used in loop quantum gravity. The material source is
an anisotropic fluid, which is arguably the most commonly used source term in
anisotropic studies within general relativity. The gravitational+anisotropic
fluid c... | [
{
"created": "Sat, 30 Jul 2011 22:24:57 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Oct 2011 21:19:19 GMT",
"version": "v2"
}
] | 2011-11-22 | [
[
"DeBenedictis",
"Andrew",
""
]
] | Anisotropic spherically symmetric systems are studied in the connection and densitized triad variables used in loop quantum gravity. The material source is an anisotropic fluid, which is arguably the most commonly used source term in anisotropic studies within general relativity. The gravitational+anisotropic fluid con... |
gr-qc/9412069 | Joan Masso | Peter Anninos, Greg Daues, Joan Masso, Edward Seidel, and Wai-Mo Suen | Horizon Boundary Condition for Black Hole Spacetimes | 22 pages, LaTeX with RevTeX 3.0 macros, 21 uuencoded gz-compressed
postscript figures. Also available at http://jean-luc.ncsa.uiuc.edu/Papers/
Submitted to Physical Review D | Phys.Rev. D51 (1995) 5562-5578 | 10.1103/PhysRevD.51.5562 | null | gr-qc | null | It was recently shown that spacetime singularities in numerical relativity
could be avoided by excising a region inside the apparent horizon in numerical
evolutions. In this paper we report on the details of the implementation of
this scheme. The scheme is based on using (1)~a horizon locking coordinate
which locks t... | [
{
"created": "Thu, 22 Dec 1994 16:37:07 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Anninos",
"Peter",
""
],
[
"Daues",
"Greg",
""
],
[
"Masso",
"Joan",
""
],
[
"Seidel",
"Edward",
""
],
[
"Suen",
"Wai-Mo",
""
]
] | It was recently shown that spacetime singularities in numerical relativity could be avoided by excising a region inside the apparent horizon in numerical evolutions. In this paper we report on the details of the implementation of this scheme. The scheme is based on using (1)~a horizon locking coordinate which locks the... |
1704.05312 | Alessandro Tronconi | Alessandro Tronconi | Asymptotically Safe Non-Minimal Inflation | 26 pages, 6 figures, final version accepted for publication in JCAP | null | 10.1088/1475-7516/2017/07/015 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the constraints imposed by the requirement of Asymptotic Safety on a
class of inflationary models with an inflaton field non-minimally coupled to
the Ricci scalar. The critical surface in the space of theories is determined
by the improved renormalization group flow which takes into account quantum
correctio... | [
{
"created": "Tue, 18 Apr 2017 13:01:31 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jul 2017 15:03:16 GMT",
"version": "v2"
}
] | 2017-07-26 | [
[
"Tronconi",
"Alessandro",
""
]
] | We study the constraints imposed by the requirement of Asymptotic Safety on a class of inflationary models with an inflaton field non-minimally coupled to the Ricci scalar. The critical surface in the space of theories is determined by the improved renormalization group flow which takes into account quantum corrections... |
gr-qc/0010017 | Jose Luis Hernandez Pastora | L. Herrera, J. Ruifernandez and N.O.Santos | The static cylinder, gyroscopes, the C metric, and all that | 17 pages Latex, five figures. To appear in Gen.Rel.Grav | Gen.Rel.Grav. 33 (2001) 515-529 | 10.1023/A:1010296808194 | null | gr-qc | null | The physical meaning of the Levi-Civita spacetime for some "critical" values
of the parameter sigma, is discussed in the light of gedanken experiments
performed with gyroscopes circumventing the axis of symmetry. The fact that
sigma=1/2 corresponds to flat space described from the point of view of an
accelerated fram... | [
{
"created": "Thu, 5 Oct 2000 10:22:00 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Herrera",
"L.",
""
],
[
"Ruifernandez",
"J.",
""
],
[
"Santos",
"N. O.",
""
]
] | The physical meaning of the Levi-Civita spacetime for some "critical" values of the parameter sigma, is discussed in the light of gedanken experiments performed with gyroscopes circumventing the axis of symmetry. The fact that sigma=1/2 corresponds to flat space described from the point of view of an accelerated frame ... |
gr-qc/9809059 | Jose Maria Martin | Jose M. Martin-Garcia (LAEFF, Madrid), Carsten Gundlach (AEI, Potsdam) | All nonspherical perturbations of the Choptuik spacetime decay | 24 pages, Revtex, 3 figures | Phys.Rev. D59 (1999) 064031 | 10.1103/PhysRevD.59.064031 | null | gr-qc | null | We study the nonspherical linear perturbations of the discretely self-similar
and spherically symmetric solution for a self-gravitating scalar field
discovered by Choptuik in the context of marginal gravitational collapse. We
find that all nonspherical perturbations decay. Therefore critical phenomena at
the threshol... | [
{
"created": "Fri, 18 Sep 1998 11:45:09 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Martin-Garcia",
"Jose M.",
"",
"LAEFF, Madrid"
],
[
"Gundlach",
"Carsten",
"",
"AEI, Potsdam"
]
] | We study the nonspherical linear perturbations of the discretely self-similar and spherically symmetric solution for a self-gravitating scalar field discovered by Choptuik in the context of marginal gravitational collapse. We find that all nonspherical perturbations decay. Therefore critical phenomena at the threshold ... |
gr-qc/9601003 | Max | Maximo Banados, Ricardo Troncoso and Jorge Zanelli | Higher dimensional Chern-Simons supergravity | Revtex, 8 pages (two column format) | Phys.Rev. D54 (1996) 2605-2611 | 10.1103/PhysRevD.54.2605 | null | gr-qc | null | A Chern-Simons action for supergravity in odd-dimensional spacetimes is
proposed. For all odd dimensions, the local symmetry group is a non trivial
supersymmetric extension of the Poincar\'e group. In $2+1$ dimensions the gauge
group reduces to super-Poincar\'e, while for $D=5$ it is super-Poincar\'e with
a central c... | [
{
"created": "Wed, 3 Jan 1996 18:39:00 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Banados",
"Maximo",
""
],
[
"Troncoso",
"Ricardo",
""
],
[
"Zanelli",
"Jorge",
""
]
] | A Chern-Simons action for supergravity in odd-dimensional spacetimes is proposed. For all odd dimensions, the local symmetry group is a non trivial supersymmetric extension of the Poincar\'e group. In $2+1$ dimensions the gauge group reduces to super-Poincar\'e, while for $D=5$ it is super-Poincar\'e with a central cha... |
1702.05715 | Sung-Jin Oh | Jonathan Luk, Sung-Jin Oh | Strong cosmic censorship in spherical symmetry for two-ended
asymptotically flat initial data I. The interior of the black hole region | 70 pages, 9 figures; minor revisions and appendices B & C added;
version accepted for publication | null | null | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is the first and main paper of a two-part series, in which we prove the
$C^{2}$-formulation of the strong cosmic censorship conjecture for the
Einstein-Maxwell-(real)-scalar-field system in spherical symmetry for two-ended
asymptotically flat data. For this model, it is known through the works of
Dafermos and Da... | [
{
"created": "Sun, 19 Feb 2017 08:20:12 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Feb 2019 03:51:20 GMT",
"version": "v2"
}
] | 2019-02-25 | [
[
"Luk",
"Jonathan",
""
],
[
"Oh",
"Sung-Jin",
""
]
] | This is the first and main paper of a two-part series, in which we prove the $C^{2}$-formulation of the strong cosmic censorship conjecture for the Einstein-Maxwell-(real)-scalar-field system in spherical symmetry for two-ended asymptotically flat data. For this model, it is known through the works of Dafermos and Dafe... |
1311.4236 | Jos\'e Villanueva | Marco Olivares and J. R. Villanueva | Massive neutral particles on heterotic string theory | 12 pages, 8 figures. Accepted for publication on EPJC | The European Physical Journal C (2013), 73: 2659 | 10.1140/epjc/s10052-013-2659-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The motion of massive particles in the background of a charged black hole in
heterotic string theory, which is characterized by a parameter $\alpha$, is
studied in detail in this paper. Since it is possible to write this space-time
in the Einstein frame, we perform a quantitative analysis of the time-like
geodesics b... | [
{
"created": "Mon, 18 Nov 2013 00:55:30 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Nov 2013 18:13:18 GMT",
"version": "v2"
}
] | 2013-12-06 | [
[
"Olivares",
"Marco",
""
],
[
"Villanueva",
"J. R.",
""
]
] | The motion of massive particles in the background of a charged black hole in heterotic string theory, which is characterized by a parameter $\alpha$, is studied in detail in this paper. Since it is possible to write this space-time in the Einstein frame, we perform a quantitative analysis of the time-like geodesics by ... |
gr-qc/0205094 | Nelson Pantoja V. | N. R. Pantoja, H. Rago and R. O. Rodriguez | Curvature singularity of the distributional BTZ black hole geometry | Latex, 7 pages | J.Math.Phys. 45 (2004) 1994-2002 | 10.1063/1.1699482 | null | gr-qc | null | For the non-rotating BTZ black hole, the distributional curvature tensor
field is found. It is shown to have singular parts proportional to a
$\delta$-distribution with support at the origin. This singularity is related,
through Einstein field equations, to a point source. Coordinate invariance and
independence on th... | [
{
"created": "Tue, 21 May 2002 23:07:10 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Pantoja",
"N. R.",
""
],
[
"Rago",
"H.",
""
],
[
"Rodriguez",
"R. O.",
""
]
] | For the non-rotating BTZ black hole, the distributional curvature tensor field is found. It is shown to have singular parts proportional to a $\delta$-distribution with support at the origin. This singularity is related, through Einstein field equations, to a point source. Coordinate invariance and independence on the ... |
1210.0457 | Huan Yang | Huan Yang, Haixing Miao, Da-Shin Lee, Bassam Helou, and Yanbei Chen | Macroscopic Quantum Mechanics in a Classical Spacetime | 5+3 pages, 1 figure | Phys. Rev. Lett. 110, 170401, (2013) | 10.1103/PhysRevLett.110.170401 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the many-particle Schr\"{o}dinger-Newton equation, which describes
the co-evolution of an many-particle quantum wave function and a classical
space-time geometry, to macroscopic mechanical objects. By averaging over
motions of the objects' internal degrees of freedom, we obtain an effective
Schr\"odinger-New... | [
{
"created": "Mon, 1 Oct 2012 16:30:00 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Oct 2012 00:21:41 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Apr 2013 21:34:29 GMT",
"version": "v3"
}
] | 2013-05-01 | [
[
"Yang",
"Huan",
""
],
[
"Miao",
"Haixing",
""
],
[
"Lee",
"Da-Shin",
""
],
[
"Helou",
"Bassam",
""
],
[
"Chen",
"Yanbei",
""
]
] | We apply the many-particle Schr\"{o}dinger-Newton equation, which describes the co-evolution of an many-particle quantum wave function and a classical space-time geometry, to macroscopic mechanical objects. By averaging over motions of the objects' internal degrees of freedom, we obtain an effective Schr\"odinger-Newto... |
gr-qc/0010033 | Lee Samuel Finn | Lee Samuel Finn | Aperture synthesis for gravitational-wave data analysis: Deterministic
Sources | 39 pages, 4 figures, submitted to Phys. Rev. D | Phys.Rev.D63:102001,2001 | 10.1103/PhysRevD.63.102001 | null | gr-qc | null | Gravitational wave detectors now under construction are sensitive to the
phase of the incident gravitational waves. Correspondingly, the signals from
the different detectors can be combined, in the analysis, to simulate a single
detector of greater amplitude and directional sensitivity: in short, aperture
synthesis. ... | [
{
"created": "Mon, 9 Oct 2000 21:36:04 GMT",
"version": "v1"
}
] | 2009-12-31 | [
[
"Finn",
"Lee Samuel",
""
]
] | Gravitational wave detectors now under construction are sensitive to the phase of the incident gravitational waves. Correspondingly, the signals from the different detectors can be combined, in the analysis, to simulate a single detector of greater amplitude and directional sensitivity: in short, aperture synthesis. He... |
2201.09143 | Juan Manuel Garcia-Islas | J.Manuel Garc\'ia-Islas | Quantum Geometry II : The Mathematics of Loop Quantum Gravity Three
dimensional quantum gravity | 15 Pages | Canadian Journal of Physics, 2021, 99(8) , 601-606 | 10.1139/cjp-2020-0423 | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | Loop quantum gravity is a physical theory which aims at unifying general
relativity and quantum mechanics. It takes general relativity very seriously
and modifies it via a quantisation. General relativity describes gravity in
terms of geometry. Therefore, quantising such theory must be equivalent to
quantising geomet... | [
{
"created": "Sat, 22 Jan 2022 23:04:08 GMT",
"version": "v1"
}
] | 2022-02-02 | [
[
"García-Islas",
"J. Manuel",
""
]
] | Loop quantum gravity is a physical theory which aims at unifying general relativity and quantum mechanics. It takes general relativity very seriously and modifies it via a quantisation. General relativity describes gravity in terms of geometry. Therefore, quantising such theory must be equivalent to quantising geometry... |
gr-qc/0009088 | Gohar Haroutyunyan | G. H. Haroutyunian (Yerevan State University) | Solution of Stationary and Axisymmetric Problem in General
Relativity.Nontraditional Approach | 9 pages, no figures | null | null | null | gr-qc | null | Physically admissible choice of the "essential" coordinates identified with
components of the metric tensor and co-moving frame of reference reduced to the
formulation of the stationary axisymmetric GR problem. Such nontraditional
approach allows to obtain new 4-parametric vacuum solution. In special static
case this... | [
{
"created": "Tue, 26 Sep 2000 10:53:25 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Haroutyunian",
"G. H.",
"",
"Yerevan State University"
]
] | Physically admissible choice of the "essential" coordinates identified with components of the metric tensor and co-moving frame of reference reduced to the formulation of the stationary axisymmetric GR problem. Such nontraditional approach allows to obtain new 4-parametric vacuum solution. In special static case this s... |
0904.4454 | Nelson Pinto-Neto | Nelson Pinto-Neto | Large classical universes emerging from quantum cosmology | 8 pages, 1 figure | Physical Review D 79, 083514 (2009) | 10.1103/PhysRevD.79.083514 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is generally believed that one cannot obtain a large Universe from quantum
cosmological models without an inflationary phase in the classical expanding
era because the typical size of the Universe after leaving the quantum regime
should be around the Planck length, and the standard decelerated classical
expansion ... | [
{
"created": "Tue, 28 Apr 2009 18:34:21 GMT",
"version": "v1"
}
] | 2009-04-29 | [
[
"Pinto-Neto",
"Nelson",
""
]
] | It is generally believed that one cannot obtain a large Universe from quantum cosmological models without an inflationary phase in the classical expanding era because the typical size of the Universe after leaving the quantum regime should be around the Planck length, and the standard decelerated classical expansion af... |
2202.08264 | Wenbin Lin | Bo Yang, Chunhua Jiang, Wenbin Lin | The second post-Newtonian motion in Reissner-Nordstr\"om spacetime | 13 pages; Accepted for publication in PRD | null | 10.1103/PhysRevD.105.064003 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We derived the second post-Newtonian solution for the quasi-Keplerian motion
of a charged test particle in the Reissner-Nordstr\"om spacetime under the
harmonic coordinates. The solution is formulated in terms of the test
particle's orbital energy and angular momentum, both of which are constants at
the second post-N... | [
{
"created": "Wed, 16 Feb 2022 14:49:04 GMT",
"version": "v1"
}
] | 2022-03-14 | [
[
"Yang",
"Bo",
""
],
[
"Jiang",
"Chunhua",
""
],
[
"Lin",
"Wenbin",
""
]
] | We derived the second post-Newtonian solution for the quasi-Keplerian motion of a charged test particle in the Reissner-Nordstr\"om spacetime under the harmonic coordinates. The solution is formulated in terms of the test particle's orbital energy and angular momentum, both of which are constants at the second post-New... |
gr-qc/9503048 | V. Y. | G.N. Parfionov and R.R. Zapatrin | POINTLESS SPACES IN GENERAL RELATIVITY | 40 Kb, latex, no figures, paper accepted for publication in the
International Journal of Theoretical Physics (May 1995) | Int.J.Theor.Phys.34:717-732,1995 | 10.1007/BF00671019 | null | gr-qc | null | The new approach to quantize the gravity based on the notion of differential
algebra is suggested. It is shown that the differential geometry of this object
can not be described in terms of points. The spatialization procedure giving
rise to points by loosing a part of the entire structure is discussed. The
counterpa... | [
{
"created": "Mon, 27 Mar 1995 08:44:04 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Parfionov",
"G. N.",
""
],
[
"Zapatrin",
"R. R.",
""
]
] | The new approach to quantize the gravity based on the notion of differential algebra is suggested. It is shown that the differential geometry of this object can not be described in terms of points. The spatialization procedure giving rise to points by loosing a part of the entire structure is discussed. The counterpart... |
1603.04797 | Paulo Michel L. T. Da Silva PMlts | Paulo Michel L. T. da Silva, Alvaro de Souza Dutra, Julio Marny Hoff
da Silva | Friedmann-Robertson-Walker Braneworlds | 16 pages, 2 figures | null | 10.1016/j.physletb.2017.06.072 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the cosmological evolution with nonsingular branes generated by a
bulk scalar field coupled to gravity. The specific setup investigated leads to
branes with a time-dependent warp factor. We calculate the effective Hubble
parameter and the effective scale factor for the FRW branes obtained solutions.
The spat... | [
{
"created": "Tue, 15 Mar 2016 18:18:24 GMT",
"version": "v1"
}
] | 2017-11-22 | [
[
"da Silva",
"Paulo Michel L. T.",
""
],
[
"Dutra",
"Alvaro de Souza",
""
],
[
"da Silva",
"Julio Marny Hoff",
""
]
] | We study the cosmological evolution with nonsingular branes generated by a bulk scalar field coupled to gravity. The specific setup investigated leads to branes with a time-dependent warp factor. We calculate the effective Hubble parameter and the effective scale factor for the FRW branes obtained solutions. The spatia... |
gr-qc/0011100 | Hongsu Kim | Hongsu Kim, Hyun Kyu Lee, Chul H. Lee (Hanyang Univ., KOREA) | Znajek-Damour Horizon Boundary Conditions with Born-Infeld
Electrodynamics | 38 pages, Revtex, typos corrected, accepted for publication in Phys.
Rev. D | Phys.Rev.D63:104024,2001 | 10.1103/PhysRevD.63.104024 | null | gr-qc astro-ph hep-th | null | In this work, the interaction of electromagnetic fields with a rotating
(Kerr) black hole is explored in the context of Born-Infeld (BI) theory of
electromagnetism instead of standard Maxwell theory and particularly BI theory
versions of the four horizon boundary conditions of Znajek and Damour are
derived. Naturally... | [
{
"created": "Tue, 28 Nov 2000 10:05:40 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Mar 2001 08:36:04 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Kim",
"Hongsu",
"",
"Hanyang Univ., KOREA"
],
[
"Lee",
"Hyun Kyu",
"",
"Hanyang Univ., KOREA"
],
[
"Lee",
"Chul H.",
"",
"Hanyang Univ., KOREA"
]
] | In this work, the interaction of electromagnetic fields with a rotating (Kerr) black hole is explored in the context of Born-Infeld (BI) theory of electromagnetism instead of standard Maxwell theory and particularly BI theory versions of the four horizon boundary conditions of Znajek and Damour are derived. Naturally, ... |
gr-qc/9910058 | Maria Cristina Neacsu | Maria C. Neacsu | The 5D-4D correspondence for the magnetic field | WSES Int.Conf.Mathematics And Computers In Physics,July
25-29,1999,Marathon,Florida (USA) | null | null | null | gr-qc | null | 5D theory is an alternative model for understanding gravitational and
electromagnetic interactions together. In this work we used the correspondence
between 5D Einstein field equations with cosmological constant and the 4D
Einstein equations with sources. We started with the principal fiber bundle
P(M/F,U(1)) metric ... | [
{
"created": "Sun, 17 Oct 1999 14:47:10 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Neacsu",
"Maria C.",
""
]
] | 5D theory is an alternative model for understanding gravitational and electromagnetic interactions together. In this work we used the correspondence between 5D Einstein field equations with cosmological constant and the 4D Einstein equations with sources. We started with the principal fiber bundle P(M/F,U(1)) metric an... |
1311.6541 | Edward Anderson | Edward Anderson and Flavio Mercati | Classical Machian Resolution of the Spacetime Reconstruction Problem | 28 pages including 4 figures. Minor text and figure improvements | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following from a question of Wheeler, why does the Hamiltonian constraint
${\cal H}$ of GR have the particular form it does? A first answer, by Hojman,
Kucha\v{r} and Teitelboim, is that using embeddability into spacetime as a
principle gives the form of ${\cal H}$. The present paper culminates a second
Machian answe... | [
{
"created": "Tue, 26 Nov 2013 01:52:42 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Feb 2014 01:26:45 GMT",
"version": "v2"
}
] | 2014-02-04 | [
[
"Anderson",
"Edward",
""
],
[
"Mercati",
"Flavio",
""
]
] | Following from a question of Wheeler, why does the Hamiltonian constraint ${\cal H}$ of GR have the particular form it does? A first answer, by Hojman, Kucha\v{r} and Teitelboim, is that using embeddability into spacetime as a principle gives the form of ${\cal H}$. The present paper culminates a second Machian answer ... |
2308.02566 | Zeeshan Gul | M. Sharif and M. Zeeshan Gul | Stellar Structures admitting Noether Symmetries in
$f(\mathcal{R},\mathcal{T})$ Gravity | 22 pages, 10 figures | Mod. Phys. Lett. A 36(2021)2150214 | 10.1142/S021773232150214X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper investigates the geometry of compact stellar objects via Noether
symmetry strategy in the framework of curvature-matter coupled gravity. For
this purpose, we assume the specific model of this theory to evaluate Noether
equations, symmetry generators and corresponding conserved parameters. We use
conserved ... | [
{
"created": "Thu, 3 Aug 2023 07:12:38 GMT",
"version": "v1"
}
] | 2023-08-16 | [
[
"Sharif",
"M.",
""
],
[
"Gul",
"M. Zeeshan",
""
]
] | This paper investigates the geometry of compact stellar objects via Noether symmetry strategy in the framework of curvature-matter coupled gravity. For this purpose, we assume the specific model of this theory to evaluate Noether equations, symmetry generators and corresponding conserved parameters. We use conserved pa... |
1607.02869 | Kourosh Nozari | Mohsen Khodadi and Kourosh Nozari | Some Features of Scattering Problem in a $\kappa$-Deformed Minkowski
Spacetime | 16 pages, 2 figures, Accepted for Publication in Annalen der Physik | Annalen der Physik 528 (2016) 785-795 | 10.1002/andp.201600072 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The doubly special relativity (DSR) theories are suggested in order to
incorporate an observer-independent length scale in special theory of
relativity. The Magueijo-Smolin proposal of DSR is realizable through a
particular form of the noncommutative (NC) spacetime (known as
$\kappa$-Minkowski spacetime) in which the... | [
{
"created": "Mon, 11 Jul 2016 09:20:44 GMT",
"version": "v1"
}
] | 2017-04-26 | [
[
"Khodadi",
"Mohsen",
""
],
[
"Nozari",
"Kourosh",
""
]
] | The doubly special relativity (DSR) theories are suggested in order to incorporate an observer-independent length scale in special theory of relativity. The Magueijo-Smolin proposal of DSR is realizable through a particular form of the noncommutative (NC) spacetime (known as $\kappa$-Minkowski spacetime) in which the L... |
2403.18610 | Luca Visinelli | Claudio Gatti, Luca Visinelli, Michael Zantedeschi | Cavity Detection of Gravitational Waves: Where Do We Stand? | 14 pages, 6 figures; COST actions CA21106 and CA21136 | Phys. Rev. D 110, 023018 (2024) | 10.1103/PhysRevD.110.023018 | CA21106; CA21136 | gr-qc astro-ph.CO astro-ph.HE hep-ex hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | High frequency gravitational waves (HFGWs) are predicted in various exotic
scenarios involving both cosmological and astrophysical sources. These elusive
signals have recently sparked the interest of a diverse community of
researchers, due to the possibility of HFGW detection in the laboratory through
graviton-photon... | [
{
"created": "Wed, 27 Mar 2024 14:26:44 GMT",
"version": "v1"
}
] | 2024-07-17 | [
[
"Gatti",
"Claudio",
""
],
[
"Visinelli",
"Luca",
""
],
[
"Zantedeschi",
"Michael",
""
]
] | High frequency gravitational waves (HFGWs) are predicted in various exotic scenarios involving both cosmological and astrophysical sources. These elusive signals have recently sparked the interest of a diverse community of researchers, due to the possibility of HFGW detection in the laboratory through graviton-photon c... |
1104.0723 | Jian-Yang Zhu | Kui Xiao and Jian-Yang Zhu | A phenomenology analysis of the tachyon warm inflation in loop quantum
cosmology | 7 pages,accepted for publication in Physics Letters B | Phys.Lett.B699:217-223,2011 | 10.1016/j.physletb.2011.04.007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the warm inflation condition in loop quantum cosmology. In our
consideration, the system is described by a tachyon field interacted with
radiation. The exponential potential function, $V(\phi)=V_0
e^{-\alpha\phi}\label{exp-p}$, with the same order parameters $V_0$ and
$\alpha$, is taken as an example o... | [
{
"created": "Tue, 5 Apr 2011 02:03:09 GMT",
"version": "v1"
}
] | 2011-06-16 | [
[
"Xiao",
"Kui",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | We investigate the warm inflation condition in loop quantum cosmology. In our consideration, the system is described by a tachyon field interacted with radiation. The exponential potential function, $V(\phi)=V_0 e^{-\alpha\phi}\label{exp-p}$, with the same order parameters $V_0$ and $\alpha$, is taken as an example of ... |
2203.09237 | Francesco Iacovelli | Francesco Iacovelli, Andreas Finke, Stefano Foffa, Michele Maggiore,
Michele Mancarella | Modified gravitational wave propagation: information from strongly
lensed binaries and the BNS mass function | 4 pages, 2 figures, contribution to the 2022 Gravitation session of
the 56th Rencontres de Moriond | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Modified gravitational wave propagation is a smoking gun of modifications of
gravity at cosmological scales, and can be the most promising observable for
testing such theories. The observation of gravitational waves (GW) in recent
years has allowed us to start probing this effect, and here we briefly review
two promi... | [
{
"created": "Thu, 17 Mar 2022 11:04:43 GMT",
"version": "v1"
}
] | 2022-03-18 | [
[
"Iacovelli",
"Francesco",
""
],
[
"Finke",
"Andreas",
""
],
[
"Foffa",
"Stefano",
""
],
[
"Maggiore",
"Michele",
""
],
[
"Mancarella",
"Michele",
""
]
] | Modified gravitational wave propagation is a smoking gun of modifications of gravity at cosmological scales, and can be the most promising observable for testing such theories. The observation of gravitational waves (GW) in recent years has allowed us to start probing this effect, and here we briefly review two promisi... |
2103.12036 | Sebasti\'an Bahamonde Dr | Sebastian Bahamonde, Jorge Gigante Valcarcel | Observational Constraints in Metric-Affine Gravity | 16 pages; Matches published version in EPJC | Eur. Phys. J. C (2021) 81:495 | 10.1140/epjc/s10052-021-09275-6 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the main classical gravitational tests for a recently found vacuum
solution with spin and dilation charges in the framework of Metric-Affine gauge
theory of gravity. Using the results of the perihelion precession of the star
S2 by the GRAVITY collaboration and the gravitational redshift of Sirius B
white dw... | [
{
"created": "Mon, 22 Mar 2021 17:38:21 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Jun 2021 12:25:40 GMT",
"version": "v2"
}
] | 2021-06-18 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Valcarcel",
"Jorge Gigante",
""
]
] | We derive the main classical gravitational tests for a recently found vacuum solution with spin and dilation charges in the framework of Metric-Affine gauge theory of gravity. Using the results of the perihelion precession of the star S2 by the GRAVITY collaboration and the gravitational redshift of Sirius B white dwar... |
1803.10905 | Mourad Guenouche | Mourad Guenouche and Sami Ryad Zouou | Deflection of light and time delay in closed Einstein-Straus solution | 23 pages, 01 figure and 06 tables | Phys. Rev. D 98, 123508 (2018) | 10.1103/PhysRevD.98.123508 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate strong lensing by a spherically symmetric mass distribution in
the framework of the Einstein-Straus solution with positive cosmological
constant and concentrate on the case of a spatially closed Universe ($k=+1$).
We develop a method based on integration of differential equations in order to
make possi... | [
{
"created": "Thu, 29 Mar 2018 02:38:42 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Oct 2018 21:36:28 GMT",
"version": "v2"
}
] | 2018-12-19 | [
[
"Guenouche",
"Mourad",
""
],
[
"Zouou",
"Sami Ryad",
""
]
] | We investigate strong lensing by a spherically symmetric mass distribution in the framework of the Einstein-Straus solution with positive cosmological constant and concentrate on the case of a spatially closed Universe ($k=+1$). We develop a method based on integration of differential equations in order to make possibl... |
1905.04061 | Sajal Mukherjee | Sajal Mukherjee and Santanu Tripathy | Resonant orbits for a spinning particle in Kerr spacetime | 29 pages, 6 figures | Phys. Rev. D 101, 124047 (2020) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present article, we study the orbital resonance corresponds to an
extended object approximated up to the dipole order term in Kerr spacetime. We
start with the Mathisson-Papapetrou equations under the linear spin
approximation and primarily concentrate on two particular events. First, when
the orbits are nearl... | [
{
"created": "Fri, 10 May 2019 10:43:57 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Jul 2020 06:20:38 GMT",
"version": "v2"
}
] | 2020-07-14 | [
[
"Mukherjee",
"Sajal",
""
],
[
"Tripathy",
"Santanu",
""
]
] | In the present article, we study the orbital resonance corresponds to an extended object approximated up to the dipole order term in Kerr spacetime. We start with the Mathisson-Papapetrou equations under the linear spin approximation and primarily concentrate on two particular events. First, when the orbits are nearly ... |
1001.1957 | Raymond Ang\'elil | Raymond Ang\'elil, Prasenjit Saha | Relativistic redshift effects and the Galactic-center stars | 21 pages, 6 figures, accepted for publication in The Astrophysical
Journal | Astrophys.J.711:157-163,2010 | 10.1088/0004-637X/711/1/157 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The high pericenter velocities (up to a few percent of light) of the S stars
around the Galactic-center black hole suggest that general relativistic effects
may be detectable through the time variation of the redshift during pericenter
passage. Previous work has computed post-Newtonian perturbations to the stellar
or... | [
{
"created": "Tue, 12 Jan 2010 17:47:29 GMT",
"version": "v1"
}
] | 2014-08-04 | [
[
"Angélil",
"Raymond",
""
],
[
"Saha",
"Prasenjit",
""
]
] | The high pericenter velocities (up to a few percent of light) of the S stars around the Galactic-center black hole suggest that general relativistic effects may be detectable through the time variation of the redshift during pericenter passage. Previous work has computed post-Newtonian perturbations to the stellar orbi... |
gr-qc/9309024 | Guillermo Mena | Guillermo A. Mena Marugan | Reality Conditions in Nonperturbative Quantum Cosmology | 34 pages, Preprint CGPG-93/9-3 | Class.Quant.Grav.11:589-608,1994 | 10.1088/0264-9381/11/3/012 | null | gr-qc | null | We carry out the nonperturbative canonical quantization of several types of
cosmological models that have already been studied in the geometrodynamic
formulation using the complex path-integral approach. We establish a relation
between the choices of complex contours in the path integral and the sets of
reality condi... | [
{
"created": "Thu, 23 Sep 1993 18:04:23 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Marugan",
"Guillermo A. Mena",
""
]
] | We carry out the nonperturbative canonical quantization of several types of cosmological models that have already been studied in the geometrodynamic formulation using the complex path-integral approach. We establish a relation between the choices of complex contours in the path integral and the sets of reality conditi... |
gr-qc/0511087 | Sergio Dain | Sergio Dain | Proof of the (local) angular momemtum-mass inequality for axisymmetric
black holes | 14 pages | Class.Quant.Grav. 23 (2006) 6845-6856 | 10.1088/0264-9381/23/23/015 | null | gr-qc | null | We prove that for any vacuum, maximal, asymptotically flat, axisymmetric
initial data for Einstein equations close to extreme Kerr data, the inequality
$\sqrt{J} \leq m$ is satisfied, where $m$ and $J$ are the total mass and
angular momentum of the data. The proof consists in showing that extreme Kerr
is a local mini... | [
{
"created": "Wed, 16 Nov 2005 14:15:16 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Dain",
"Sergio",
""
]
] | We prove that for any vacuum, maximal, asymptotically flat, axisymmetric initial data for Einstein equations close to extreme Kerr data, the inequality $\sqrt{J} \leq m$ is satisfied, where $m$ and $J$ are the total mass and angular momentum of the data. The proof consists in showing that extreme Kerr is a local minimu... |
gr-qc/0508119 | Tomasz Stachowiak | Tomasz Stachowiak, Marek Szydlowski, Andrzej J. Maciejewski | Non-integrability of density perturbations in the FRW universe | 13 pages. The latest version with added references, and a relevant
new paragraph in section II | J.Math.Phys. 47 (2006) 032502 | 10.1063/1.2178584 | null | gr-qc math-ph math.MP | null | We investigate the evolution equation of linear density perturbations in the
Friedmann-Robertson-Walker universe with matter, radiation and the cosmological
constant. The concept of solvability by quadratures is defined and used to
prove that there are no "closed form" solutions except for the known Chernin,
Heath, M... | [
{
"created": "Mon, 29 Aug 2005 12:39:58 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Nov 2005 16:03:57 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Mar 2006 16:37:36 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Stachowiak",
"Tomasz",
""
],
[
"Szydlowski",
"Marek",
""
],
[
"Maciejewski",
"Andrzej J.",
""
]
] | We investigate the evolution equation of linear density perturbations in the Friedmann-Robertson-Walker universe with matter, radiation and the cosmological constant. The concept of solvability by quadratures is defined and used to prove that there are no "closed form" solutions except for the known Chernin, Heath, Mes... |
1705.05456 | Vladimir Ivashchuk | K. K. Ernazarov and V. D. Ivashchuk | Stable exponential cosmological solutions with zero variation of $G$ and
three different Hubble-like parameters in the Einstein-Gauss-Bonnet model
with a $\Lambda$-term | 16 pages, Latex, no figures, prepared for a talk at 16th Russian
Gravitational Conference - International Conference on General Relativity,
Cosmology and Astrophysics (Kaliningrad, 24-30 June); several typos are
eliminated | null | 10.1140/epjc/s10052-017-4974-7 | IGC-RUDN-2017/05-01-cor | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a $D$-dimensional gravitational model with a Gauss-Bonnet term
and the cosmological term $\Lambda$. We restrict the metrics to diagonal
cosmological ones and find for certain $\Lambda$ a class of solutions with
exponential time dependence of three scale factors, governed by three
non-coinciding Hubble-lik... | [
{
"created": "Mon, 15 May 2017 21:14:43 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Jun 2017 22:00:47 GMT",
"version": "v2"
}
] | 2017-08-02 | [
[
"Ernazarov",
"K. K.",
""
],
[
"Ivashchuk",
"V. D.",
""
]
] | We consider a $D$-dimensional gravitational model with a Gauss-Bonnet term and the cosmological term $\Lambda$. We restrict the metrics to diagonal cosmological ones and find for certain $\Lambda$ a class of solutions with exponential time dependence of three scale factors, governed by three non-coinciding Hubble-like ... |
1302.2536 | Partha Pratim Pradhan | Partha Pratim Pradhan | Lyapunov Exponent and Charged Myers Perry Spacetimes | Accepted for publication in EPJC. arXiv admin note: substantial text
overlap with arXiv:1212.5758, arXiv:1205.5656 | Eur. Phys. J. C (2013) 73:2477 | 10.1140/epjc/s10052-013-2477-8 | null | gr-qc astro-ph.HE math-ph math.MP nlin.CD | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the proper time Lyapunov exponent for charged Myers Perry black
hole spacetime and investigate the instability of the equatorial circular
geodesics (both timelike and null) via this exponent. We also show that for
more than four spacetime dimensions $(N \geq 3)$, there are \emph{no} Innermost
Stable Circul... | [
{
"created": "Mon, 11 Feb 2013 17:11:02 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jun 2013 09:33:52 GMT",
"version": "v2"
}
] | 2013-07-05 | [
[
"Pradhan",
"Partha Pratim",
""
]
] | We compute the proper time Lyapunov exponent for charged Myers Perry black hole spacetime and investigate the instability of the equatorial circular geodesics (both timelike and null) via this exponent. We also show that for more than four spacetime dimensions $(N \geq 3)$, there are \emph{no} Innermost Stable Circular... |
0905.2664 | Muhammad Sharif | M. Sharif and G. Abbas | Effects of Electromagnetic Field on Gravitational Collapse | 17 pages, accepted for publication in Mod. Phys. Lett A | Mod.Phys.Lett.A24:2551-2563,2009 | 10.1142/S0217732309030916 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the effect of electromagnetic field has been investigated on
the spherically symmetric collapse with the perfect fluid in the presence of
positive cosmological constant. Junction conditions between the static exterior
and non-static interior spherically symmetric spacetimes are discussed. We
study the ... | [
{
"created": "Sat, 16 May 2009 07:48:43 GMT",
"version": "v1"
}
] | 2009-11-05 | [
[
"Sharif",
"M.",
""
],
[
"Abbas",
"G.",
""
]
] | In this paper, the effect of electromagnetic field has been investigated on the spherically symmetric collapse with the perfect fluid in the presence of positive cosmological constant. Junction conditions between the static exterior and non-static interior spherically symmetric spacetimes are discussed. We study the ap... |
gr-qc/0606040 | Francesco Cianfrani dr | Francesco Cianfrani, Giovanni Montani | Low-energy sector of 8-dimensional General Relativity: Electro-Weak
model and neutrino mass | 14 pages, 1 figure, to appear on Int. J. Mod. Phys. D | Int.J.Mod.Phys.D17:785-798,2008 | 10.1142/S0218271808012498 | null | gr-qc | null | In a Kaluza-Klein space-time $V^{4}\otimes S^{3}$, we demonstrate that the
dimensional reduction of spinors provides a 4-field, whose associated SU(2)
gauge connections are geometrized. However, additional and gauge-violating
terms arise, but they are highly suppressed by a factor $\beta$, which fixes
the amount of t... | [
{
"created": "Fri, 9 Jun 2006 09:28:34 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Jan 2008 10:56:53 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Cianfrani",
"Francesco",
""
],
[
"Montani",
"Giovanni",
""
]
] | In a Kaluza-Klein space-time $V^{4}\otimes S^{3}$, we demonstrate that the dimensional reduction of spinors provides a 4-field, whose associated SU(2) gauge connections are geometrized. However, additional and gauge-violating terms arise, but they are highly suppressed by a factor $\beta$, which fixes the amount of the... |
gr-qc/0602082 | Sunil Maharaj | S. Thirukkanesh and S. D. Maharaj | Exact models for isotropic matter | 14 pages, to appear in Class. Quantum Grav | Class.Quant.Grav. 23 (2006) 2697-2709 | 10.1088/0264-9381/23/7/028 | null | gr-qc | null | We study the Einstein-Maxwell system of equations in spherically symmetric
gravitational fields for static interior spacetimes. The condition for pressure
isotropy is reduced to a recurrence equation with variable, rational
coefficients. We demonstrate that this difference equation can be solved in
general using math... | [
{
"created": "Tue, 21 Feb 2006 09:33:09 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Thirukkanesh",
"S.",
""
],
[
"Maharaj",
"S. D.",
""
]
] | We study the Einstein-Maxwell system of equations in spherically symmetric gravitational fields for static interior spacetimes. The condition for pressure isotropy is reduced to a recurrence equation with variable, rational coefficients. We demonstrate that this difference equation can be solved in general using mathem... |
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