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1607.05524 | Sourav Dutta | Sourav Dutta and Subenoy Chakraborty | Answer to the Comments on the paper "A study of phantom scalar field
cosmology using Lie and Noether symmetries" by A. Paliathanasis, et al.
arXiv:1605.05147 | null | null | 10.1142/S021827181675002X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is a short communication in reference to the comments in (arXiv:
1605.05147) of our paper in Int. J. Mod. Phys. D 25, 1650051 (2016). We have
tried to answer to the comments or criticism in the paper.
| [
{
"created": "Tue, 19 Jul 2016 11:23:17 GMT",
"version": "v1"
}
] | 2017-02-01 | [
[
"Dutta",
"Sourav",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | This is a short communication in reference to the comments in (arXiv: 1605.05147) of our paper in Int. J. Mod. Phys. D 25, 1650051 (2016). We have tried to answer to the comments or criticism in the paper. |
1301.4553 | Abhishek Majhi | Abhishek Majhi, Parthasarathi Majumdar | Quantum Hairs and Entropy of Quantum Isolated Horizon from Chern-Simons
Theory | 11 pages, version accepted for publication in Classical and Quantum
Gravity | Class. Quantum Grav. 31 (2014) 195003 | 10.1088/0264-9381/31/19/195003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We articulate the fact that the loop quantum gravity description of the
quantum macrostates of black hole horizons, modeled as Quantum Isolated
Horizons (QIHs), is completely characterized in terms of two independent
integer-valued `quantum hairs', viz,. the coupling constant $(k)$ of the
quantum $SU(2)$ Chern-Simons... | [
{
"created": "Sat, 19 Jan 2013 10:10:24 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Mar 2014 14:39:26 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Aug 2014 14:07:29 GMT",
"version": "v3"
}
] | 2014-09-16 | [
[
"Majhi",
"Abhishek",
""
],
[
"Majumdar",
"Parthasarathi",
""
]
] | We articulate the fact that the loop quantum gravity description of the quantum macrostates of black hole horizons, modeled as Quantum Isolated Horizons (QIHs), is completely characterized in terms of two independent integer-valued `quantum hairs', viz,. the coupling constant $(k)$ of the quantum $SU(2)$ Chern-Simons t... |
2205.06329 | Marco Schreck MS | Carlos M. Reyes, Marco Schreck, Alex Soto | Cosmology in the presence of diffeomorphism-violating, nondynamical
background fields | 18 pages, 2 figures | null | 10.1103/PhysRevD.106.023524 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider diffeomorphism violation, which is parameterized by nondynamical
background fields of the gravitational Standard-Model Extension (SME), and
study its effects on the time evolution of the Universe. Our goal is to
identify background field configurations that imply stages of accelerated
expansion without ex... | [
{
"created": "Thu, 12 May 2022 19:38:20 GMT",
"version": "v1"
}
] | 2022-08-03 | [
[
"Reyes",
"Carlos M.",
""
],
[
"Schreck",
"Marco",
""
],
[
"Soto",
"Alex",
""
]
] | We consider diffeomorphism violation, which is parameterized by nondynamical background fields of the gravitational Standard-Model Extension (SME), and study its effects on the time evolution of the Universe. Our goal is to identify background field configurations that imply stages of accelerated expansion without exot... |
2204.11676 | Diego S\'aez-Chill\'on G\'omez | Diego \'Alvarez-Ortega, Gonzalo J. Olmo, Diego Rubiera-Garc\'ia and
Diego S\'aez-Chill\'on G\'omez | Eternal vs singular observers in interacting dark energy-dark matter
models | 14 pages, 3 figures | null | 10.1103/PhysRevD.106.023523 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Interacting dark energy-dark matter models have been widely analyzed in the
literature in an attempt to find traces of new physics beyond the usual
cosmological ($\Lambda$CDM) models. Such a coupling between both dark
components is usually introduced in a phenomenological way through a flux in
the continuity equation... | [
{
"created": "Mon, 25 Apr 2022 14:12:57 GMT",
"version": "v1"
}
] | 2022-08-17 | [
[
"Álvarez-Ortega",
"Diego",
""
],
[
"Olmo",
"Gonzalo J.",
""
],
[
"Rubiera-García",
"Diego",
""
],
[
"Gómez",
"Diego Sáez-Chillón",
""
]
] | Interacting dark energy-dark matter models have been widely analyzed in the literature in an attempt to find traces of new physics beyond the usual cosmological ($\Lambda$CDM) models. Such a coupling between both dark components is usually introduced in a phenomenological way through a flux in the continuity equation. ... |
gr-qc/0512026 | Iver. H. Brevik | Iver Brevik, Jon-Mattis Borven, and Sebastian Ng | Viscous Brane Cosmology with a Brane-Bulk Energy Interchange Term | 12 pages, latex, no figures | Gen.Rel.Grav.38:907-915,2006 | 10.1007/s10714-006-0271-8 | null | gr-qc hep-th | null | We assume a flat brane located at y=0, surrounded by an AdS space, and
consider the 5D Einstein equations when the energy flux component of the
energy-momentum tensor is related to the Hubble parameter through a constant Q.
We calculate the metric tensor, as well as the Hubble parameter on the brane,
when Q is small.... | [
{
"created": "Mon, 5 Dec 2005 10:22:46 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Brevik",
"Iver",
""
],
[
"Borven",
"Jon-Mattis",
""
],
[
"Ng",
"Sebastian",
""
]
] | We assume a flat brane located at y=0, surrounded by an AdS space, and consider the 5D Einstein equations when the energy flux component of the energy-momentum tensor is related to the Hubble parameter through a constant Q. We calculate the metric tensor, as well as the Hubble parameter on the brane, when Q is small. A... |
2406.17402 | Jiawei Hu | Di Hao, Jiawei Hu, Hongwei Yu | Quantum gravitomagnetic interaction | 18 pages, 1 figure | Phys. Rev. D 109, 126016 (2024) | 10.1103/PhysRevD.109.126016 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of linearized quantum gravity, we study the quantum
gravitational interaction between two nonpointlike objects induced by
fluctuating gravitomagnetic fields in vacuum. We find that, in addition to the
quantum gravitational interaction induced by fluctuating gravitoelectric fields
previously studied, ... | [
{
"created": "Tue, 25 Jun 2024 09:25:04 GMT",
"version": "v1"
}
] | 2024-06-26 | [
[
"Hao",
"Di",
""
],
[
"Hu",
"Jiawei",
""
],
[
"Yu",
"Hongwei",
""
]
] | In the framework of linearized quantum gravity, we study the quantum gravitational interaction between two nonpointlike objects induced by fluctuating gravitomagnetic fields in vacuum. We find that, in addition to the quantum gravitational interaction induced by fluctuating gravitoelectric fields previously studied, th... |
gr-qc/0010106 | Sarah Beryl Melisande Bell | Sarah B. M. Bell, John P. Cullerne and Bernard M. Diaz (Department of
Computer Science I. Q. Group, University of Liverpool, United Kingdom) | A new approach to quantum gravity: an overview | This paper has been superceded by quant-ph/0104017, quant-ph/0104018,
quant-ph/0110162 and physics/0211108. Proceedings of the Vigier 2000
Symposium, August 21-25, 2000, University of California, Berkeley, CA USA. 9
pages | null | null | null | gr-qc | null | We quantise General Relativity for a class of energy-momentum-stress tensors.
| [
{
"created": "Sat, 28 Oct 2000 17:23:12 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Nov 2001 17:50:17 GMT",
"version": "v2"
},
{
"created": "Wed, 27 Nov 2002 20:28:04 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Bell",
"Sarah B. M.",
"",
"Department of\n Computer Science I. Q. Group, University of Liverpool, United Kingdom"
],
[
"Cullerne",
"John P.",
"",
"Department of\n Computer Science I. Q. Group, University of Liverpool, United Kingdom"
],
[
"Diaz",
"Bernard M.",
... | We quantise General Relativity for a class of energy-momentum-stress tensors. |
2312.16589 | Susobhan Mandal | Golam Mortuza Hossain, Susobhan Mandal | Effects of magnetic field on the equation of state in curved spacetime
of a neutron star | 8 pages, 4 figures, revtex4 | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Neutron stars are known to have strong magnetic fields reaching as high as
$10^{15}$ Gauss, besides having strongly curved interior spacetime. So for
computing an equation of state for neutron-star matter, the effect of magnetic
field as well as curved spacetime should be taken into account. In this
article, we compu... | [
{
"created": "Wed, 27 Dec 2023 14:30:46 GMT",
"version": "v1"
}
] | 2023-12-29 | [
[
"Hossain",
"Golam Mortuza",
""
],
[
"Mandal",
"Susobhan",
""
]
] | Neutron stars are known to have strong magnetic fields reaching as high as $10^{15}$ Gauss, besides having strongly curved interior spacetime. So for computing an equation of state for neutron-star matter, the effect of magnetic field as well as curved spacetime should be taken into account. In this article, we compute... |
gr-qc/0401082 | Roberto Aloisio | R. Aloisio, P. Blasi, A. Galante and A.F. Grillo | Phenomenology of Space Time Fluctuations | 18 pages, 1 figure, talk given at the 10th Marcel Grossman Meeting
(Rio de Janeiro, July 20 - 26, 2003) | null | 10.1142/9789812704030_0285 | null | gr-qc astro-ph | null | Quantum gravitational effects may induce stochastic fluctuations in the
structure of space-time, to produce a characteristic foamy structure. It has
been known for some time now that these fluctuations may have observable
consequences for the propagation of cosmic ray particles over cosmological
distances. While invo... | [
{
"created": "Mon, 19 Jan 2004 18:12:31 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Aloisio",
"R.",
""
],
[
"Blasi",
"P.",
""
],
[
"Galante",
"A.",
""
],
[
"Grillo",
"A. F.",
""
]
] | Quantum gravitational effects may induce stochastic fluctuations in the structure of space-time, to produce a characteristic foamy structure. It has been known for some time now that these fluctuations may have observable consequences for the propagation of cosmic ray particles over cosmological distances. While invoke... |
2008.07396 | Arick Shao | Arick Shao | The Near-Boundary Geometry of Einstein-Vacuum Asymptotically Anti-de
Sitter Spacetimes | 46 pages. Accepted version - some typos corrected | null | 10.1088/1361-6382/abc81a | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the geometry of a general class of vacuum asymptotically Anti-de
Sitter spacetimes near the conformal boundary. In particular, the spacetime is
only assumed to have finite regularity, and it is allowed to have arbitrary
boundary topology and geometry. For the main results, we derive limits at the
conformal b... | [
{
"created": "Mon, 17 Aug 2020 15:10:45 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Nov 2020 00:41:04 GMT",
"version": "v2"
}
] | 2020-11-18 | [
[
"Shao",
"Arick",
""
]
] | We study the geometry of a general class of vacuum asymptotically Anti-de Sitter spacetimes near the conformal boundary. In particular, the spacetime is only assumed to have finite regularity, and it is allowed to have arbitrary boundary topology and geometry. For the main results, we derive limits at the conformal bou... |
0704.3372 | Norbert Van den Bergh | Norbert Van den Bergh, John Carminati, Hamid Reza Karimian | Shearfree perfect fluids with solenoidal magnetic curvature and a
gamma-law equation of state | 11 pages | Class.Quant.Grav.24:3735-3744,2007 | 10.1088/0264-9381/24/14/012 | null | gr-qc | null | We show that shearfree perfect fluids obeying an equation of state p=(gamma
-1) mu are non-rotating or non-expanding under the assumption that the spatial
divergence of the magnetic part of the Weyl tensor is zero.
| [
{
"created": "Wed, 25 Apr 2007 13:49:55 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Bergh",
"Norbert Van den",
""
],
[
"Carminati",
"John",
""
],
[
"Karimian",
"Hamid Reza",
""
]
] | We show that shearfree perfect fluids obeying an equation of state p=(gamma -1) mu are non-rotating or non-expanding under the assumption that the spatial divergence of the magnetic part of the Weyl tensor is zero. |
0812.2671 | Philippe G. LeFloch | Philippe G. LeFloch | Injectivity radius and optimal regularity of Lorentzian manifolds with
bounded curvature | 13 pages | null | null | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review recent work on the local geometry and optimal regularity of
Lorentzian manifolds with bounded curvature. Our main results provide an
estimate of the injectivity radius of an observer, and a local canonical
foliations by CMC (Constant Mean Curvature) hypersurfaces, together with
spatially harmonic coordinate... | [
{
"created": "Sun, 14 Dec 2008 19:34:26 GMT",
"version": "v1"
}
] | 2008-12-20 | [
[
"LeFloch",
"Philippe G.",
""
]
] | We review recent work on the local geometry and optimal regularity of Lorentzian manifolds with bounded curvature. Our main results provide an estimate of the injectivity radius of an observer, and a local canonical foliations by CMC (Constant Mean Curvature) hypersurfaces, together with spatially harmonic coordinates.... |
1705.05340 | Oliver Janssen | Juan Diaz Dorronsoro, Jonathan J. Halliwell, James B. Hartle, Thomas
Hertog and Oliver Janssen | The Real No-Boundary Wave Function in Lorentzian Quantum Cosmology | 1 + 10.5 + 2.5 pages, 2 figures. v2: minor changes and added
references | Phys. Rev. D 96, 043505 (2017) | 10.1103/PhysRevD.96.043505 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the standard no-boundary wave function has a natural
expression in terms of a Lorentzian path integral with its contour defined by
Picard-Lefschetz theory. The wave function is real, satisfies the
Wheeler-DeWitt equation and predicts an ensemble of asymptotically classical,
inflationary universes wit... | [
{
"created": "Mon, 15 May 2017 17:15:09 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Jun 2017 22:51:50 GMT",
"version": "v2"
}
] | 2017-08-16 | [
[
"Dorronsoro",
"Juan Diaz",
""
],
[
"Halliwell",
"Jonathan J.",
""
],
[
"Hartle",
"James B.",
""
],
[
"Hertog",
"Thomas",
""
],
[
"Janssen",
"Oliver",
""
]
] | It is shown that the standard no-boundary wave function has a natural expression in terms of a Lorentzian path integral with its contour defined by Picard-Lefschetz theory. The wave function is real, satisfies the Wheeler-DeWitt equation and predicts an ensemble of asymptotically classical, inflationary universes with ... |
gr-qc/0604120 | Luca Lusanna | Luca Lusanna (INFN, Firenze) | The Chrono-geometrical Structure of Special and General Relativity: a
Re-Visitation of Canonical Geometrodynamics | 33 pages, Lectures given at the 42nd Karpacz Winter School of
Theoretical Physics, "Current Mathematical Topics in Gravitation and
Cosmology", Ladek, Poland, 6-11 February 2006 | ECONFC0602061:05,2006; Int.J.Geom.Meth.Mod.Phys.4:79-114,2007 | 10.1142/S0219887807001874 | null | gr-qc astro-ph hep-th | null | A modern re-visitation of the consequences of the lack of an intrinsic notion
of instantaneous 3-space in relativistic theories leads to a reformulation of
their kinematical basis emphasizing the role of non-inertial frames centered on
an arbitrary accelerated observer. In special relativity the exigence of
predictab... | [
{
"created": "Thu, 27 Apr 2006 14:34:30 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Lusanna",
"Luca",
"",
"INFN, Firenze"
]
] | A modern re-visitation of the consequences of the lack of an intrinsic notion of instantaneous 3-space in relativistic theories leads to a reformulation of their kinematical basis emphasizing the role of non-inertial frames centered on an arbitrary accelerated observer. In special relativity the exigence of predictabil... |
1406.5909 | Ettore Minguzzi | E. Minguzzi | Completeness of Cauchy horizon generators | 14 pages. v2: corrected some typos | J. Math. Phys. 55 (2014) 082503 | 10.1063/1.4893877 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is proved that every compactly generated future Cauchy horizon has past
complete generators, and dually. No condition on the differentiability of the
horizon is imposed.
| [
{
"created": "Mon, 23 Jun 2014 14:05:01 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Oct 2014 15:15:47 GMT",
"version": "v2"
}
] | 2014-10-02 | [
[
"Minguzzi",
"E.",
""
]
] | It is proved that every compactly generated future Cauchy horizon has past complete generators, and dually. No condition on the differentiability of the horizon is imposed. |
2210.13877 | Samuele Marco Silveravalle | Samuele Silveravalle, Alessandro Zuccotti | The phase diagram of Einstein-Weyl gravity | 10 pages, 7 figures | Phys.Rev.D 107 (2023) 6, 064029 | 10.1103/PhysRevD.107.064029 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Thanks to their interpretation as first order correction of General
Relativity at high energies, quadratic theories of gravity gained much
attention in recent times. Particular attention has been drawn to the
Einstein-Weyl theory, where the addition of the squared Weyl tensor to the
action opens the possibility of ha... | [
{
"created": "Tue, 25 Oct 2022 10:05:35 GMT",
"version": "v1"
}
] | 2023-03-17 | [
[
"Silveravalle",
"Samuele",
""
],
[
"Zuccotti",
"Alessandro",
""
]
] | Thanks to their interpretation as first order correction of General Relativity at high energies, quadratic theories of gravity gained much attention in recent times. Particular attention has been drawn to the Einstein-Weyl theory, where the addition of the squared Weyl tensor to the action opens the possibility of havi... |
2012.02723 | Shahab Shahidi | Jin-Zhao Yang, Shahab Shahidi, Tiberiu Harko and Shi-Dong Liang | Black hole solutions in modified gravity induced by quantum metric
fluctuations | 23 pages, 30 figures, Accepted for publication in Physics of the Dark
Universe | Phys. Dark Univ. 31 (2021) 100756 | 10.1016/j.dark.2020.100756 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inclusion of the quantum fluctuations of the metric in the geometric
action is a promising avenue for the understanding of the quantum properties of
gravity. In this approach the metric is decomposed in the sum of a classical
and of a fluctuating part, of quantum origin, which can be generally expressed
in terms ... | [
{
"created": "Fri, 4 Dec 2020 17:14:09 GMT",
"version": "v1"
}
] | 2021-04-19 | [
[
"Yang",
"Jin-Zhao",
""
],
[
"Shahidi",
"Shahab",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Liang",
"Shi-Dong",
""
]
] | The inclusion of the quantum fluctuations of the metric in the geometric action is a promising avenue for the understanding of the quantum properties of gravity. In this approach the metric is decomposed in the sum of a classical and of a fluctuating part, of quantum origin, which can be generally expressed in terms of... |
gr-qc/0105016 | Eric Poisson | William G. Laarakkers and Eric Poisson | Radiative falloff in Einstein-Straus spacetime | ReVTeX, 12 pages, 14 figures | Phys.Rev. D64 (2001) 084008 | 10.1103/PhysRevD.64.084008 | null | gr-qc | null | The Einstein-Straus spacetime describes a nonrotating black hole immersed in
a matter-dominated cosmology. It is constructed by scooping out a spherical
ball of the dust and replacing it with a vacuum region containing a black hole
of the same mass. The metric is smooth at the boundary, which is comoving with
the res... | [
{
"created": "Thu, 3 May 2001 19:37:22 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Laarakkers",
"William G.",
""
],
[
"Poisson",
"Eric",
""
]
] | The Einstein-Straus spacetime describes a nonrotating black hole immersed in a matter-dominated cosmology. It is constructed by scooping out a spherical ball of the dust and replacing it with a vacuum region containing a black hole of the same mass. The metric is smooth at the boundary, which is comoving with the rest ... |
1702.07743 | Mart\'in G. Richarte MR | Mauricio Cataldo, Luis P. Chimento, and Mart\'in G. Richarte | Finite time future singularities in the interacting dark sector | 12 pages, 2 figures. Accepted for its publication in Physical Review
D | null | 10.1103/PhysRevD.95.063510 | Phys. Rev. D 95, 063510 (2017) | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a piecewise model that gives a physical viable realization of
finite-time future singularity for a spatially flat Friedmann-Robertson-Walker
universe within the interacting dark matter--dark energy framework, with the
latter one in the form of a variable vacuum energy. The scale factor solutions
provided... | [
{
"created": "Fri, 24 Feb 2017 20:02:04 GMT",
"version": "v1"
}
] | 2017-03-14 | [
[
"Cataldo",
"Mauricio",
""
],
[
"Chimento",
"Luis P.",
""
],
[
"Richarte",
"Martín G.",
""
]
] | We construct a piecewise model that gives a physical viable realization of finite-time future singularity for a spatially flat Friedmann-Robertson-Walker universe within the interacting dark matter--dark energy framework, with the latter one in the form of a variable vacuum energy. The scale factor solutions provided b... |
2401.00990 | Yan Peng | Yan Peng | Analytical investigations on the Maxwell electromagnetic invariant in
the spinning and charged horizonless star background | 6 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study properties of the Maxwell electromagnetic invariant in the external
region of spinning and charged horizonless stars. We analytically find that the
minimum negative value of the Maxwell electromagnetic invariant is obtained on
the equator of the star surface. We are interested in scalar fields
non-minimally ... | [
{
"created": "Tue, 2 Jan 2024 01:59:52 GMT",
"version": "v1"
}
] | 2024-01-03 | [
[
"Peng",
"Yan",
""
]
] | We study properties of the Maxwell electromagnetic invariant in the external region of spinning and charged horizonless stars. We analytically find that the minimum negative value of the Maxwell electromagnetic invariant is obtained on the equator of the star surface. We are interested in scalar fields non-minimally co... |
1904.05431 | Lucila Kraiselburd | Lucila Kraiselburd, Susana J. Landau, Marcelo Salgado, Daniel Sudarsky
and H\'ector Vucetich | Thick shell regime in the chameleon two-body problem | 12 pages, 6 figures, accepted by PRD | Phys. Rev. D 99, 083516 (2019) | 10.1103/PhysRevD.99.083516 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a previous paper [Phys. Rev. D 97, 104044 (2018)] we pointed out some
shortcomings of the standard approach to chameleon theories consisting in
treating the small bodies used to test the weak equivalence principle (WEP) as
test particles, whose presence do not modify the chameleon field configuration.
In that pape... | [
{
"created": "Wed, 10 Apr 2019 20:46:21 GMT",
"version": "v1"
}
] | 2019-04-22 | [
[
"Kraiselburd",
"Lucila",
""
],
[
"Landau",
"Susana J.",
""
],
[
"Salgado",
"Marcelo",
""
],
[
"Sudarsky",
"Daniel",
""
],
[
"Vucetich",
"Héctor",
""
]
] | In a previous paper [Phys. Rev. D 97, 104044 (2018)] we pointed out some shortcomings of the standard approach to chameleon theories consisting in treating the small bodies used to test the weak equivalence principle (WEP) as test particles, whose presence do not modify the chameleon field configuration. In that paper ... |
1303.0666 | Johannes Hartung | Johannes Hartung and Jan Steinhoff and Gerhard Sch\"afer | Recent progress in spin calculations in the post-Newtonian framework and
applications | 3 pages, Proceedings of the 13th Marcel Grossmann Meeting | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently we derived the next-to-next-to-leading order post-Newtonian
Hamiltonians at spin-orbit and spin(1)-spin(2) level for a binary system of
compact objects. In this talk the derivation of them will be shortly outlined
at an introductory level. We will also discuss some checks of our (complicated
and long) result... | [
{
"created": "Mon, 4 Mar 2013 10:34:27 GMT",
"version": "v1"
}
] | 2013-03-05 | [
[
"Hartung",
"Johannes",
""
],
[
"Steinhoff",
"Jan",
""
],
[
"Schäfer",
"Gerhard",
""
]
] | Recently we derived the next-to-next-to-leading order post-Newtonian Hamiltonians at spin-orbit and spin(1)-spin(2) level for a binary system of compact objects. In this talk the derivation of them will be shortly outlined at an introductory level. We will also discuss some checks of our (complicated and long) results ... |
1606.09286 | Alexander B. Balakin | Alexander B. Balakin | Axionic extension of the Einstein-aether theory | 15 pages, 0 figures, accepted for publication in Physical Review D | Phys. Rev. D (2016) 94, 024021 | 10.1103/PhysRevD.94.024021 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the Einstein-aether theory to take into account the interaction
between a pseudoscalar field, which describes the axionic dark matter, and a
time-like dynamic unit vector field, which characterizes the velocity of the
aether motion. The Lagrangian of the Einstein-aether-axion theory includes
cross-terms bas... | [
{
"created": "Wed, 29 Jun 2016 21:00:59 GMT",
"version": "v1"
}
] | 2016-07-11 | [
[
"Balakin",
"Alexander B.",
""
]
] | We extend the Einstein-aether theory to take into account the interaction between a pseudoscalar field, which describes the axionic dark matter, and a time-like dynamic unit vector field, which characterizes the velocity of the aether motion. The Lagrangian of the Einstein-aether-axion theory includes cross-terms based... |
gr-qc/0407037 | Daniele Malafarina | L. Herrera, G. Magli, D. Malafarina | Non-spherical sources of static gravitational fields: investigating the
boundaries of the no-hair theorem | 10 pages, 2 figures | Gen.Rel.Grav.37:1371-1383,2005 | 10.1007/s10714-005-0120-1 | null | gr-qc | null | A new, globally regular model describing a static, non spherical gravitating
object in General Relativity is presented. The model is composed by a vacuum
Weyl--Levi-Civita special field - the so called gamma metric - generated by a
regular static distribution of mass-energy. Standard requirements of physical
reasonab... | [
{
"created": "Fri, 9 Jul 2004 09:49:56 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Herrera",
"L.",
""
],
[
"Magli",
"G.",
""
],
[
"Malafarina",
"D.",
""
]
] | A new, globally regular model describing a static, non spherical gravitating object in General Relativity is presented. The model is composed by a vacuum Weyl--Levi-Civita special field - the so called gamma metric - generated by a regular static distribution of mass-energy. Standard requirements of physical reasonable... |
gr-qc/0606035 | Alexander Burinskii | Alexander Burinskii | Kerr geometry beyond the Quantum theory | 13 pages, 3 figures, based on the invited talk given at the workshop
`Beyond the Quantum',v. 2. added new results, title is changed | null | 10.1142/9789812771186_0026 | null | gr-qc hep-th quant-ph | null | The Dirac electron theory and QED do not take into account gravitational
field, while the corresponding Kerr-Newman solution with parameters of electron
has very strong stringy, topological and non-local action on the Compton
distances, polarizing space-time and deforming the Coulomb field. We discuss
the relation of... | [
{
"created": "Thu, 8 Jun 2006 12:58:02 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Oct 2006 12:56:29 GMT",
"version": "v2"
}
] | 2017-08-23 | [
[
"Burinskii",
"Alexander",
""
]
] | The Dirac electron theory and QED do not take into account gravitational field, while the corresponding Kerr-Newman solution with parameters of electron has very strong stringy, topological and non-local action on the Compton distances, polarizing space-time and deforming the Coulomb field. We discuss the relation of t... |
0906.2754 | Alfredo Lopez Ortega | A. Lopez-Ortega | The Dirac equation in D-dimensional spherically symmetric spacetimes | 10 pages, 2 figures | Lat. Am. Jour. Phys. Educ. 3 (2009) 578. | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We expound in detail a method frequently used to reduce the Dirac equation in
D-dimensional (D >= 4) spherically symmetric spacetimes to a pair of coupled
partial differential equations in two variables. As a simple application of
these results we exactly calculate the quasinormal frequencies of the uncharged
Dirac f... | [
{
"created": "Mon, 15 Jun 2009 18:31:41 GMT",
"version": "v1"
}
] | 2010-02-03 | [
[
"Lopez-Ortega",
"A.",
""
]
] | We expound in detail a method frequently used to reduce the Dirac equation in D-dimensional (D >= 4) spherically symmetric spacetimes to a pair of coupled partial differential equations in two variables. As a simple application of these results we exactly calculate the quasinormal frequencies of the uncharged Dirac fie... |
2211.10481 | Michael Grayson | Michael Grayson, Charlie Rackson | Maximal energy extraction through information gathering | 6 pages, 1 figure | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the maximal non-equilibrium work that can be extracted from any
mass using information about its micro-state. This is done through the use of
black hole thermodynamics in the context of the thermodynamics of information.
The non-equilibrium work that can be obtained by knowing the exact micro-state
is fo... | [
{
"created": "Fri, 18 Nov 2022 19:31:48 GMT",
"version": "v1"
}
] | 2022-11-22 | [
[
"Grayson",
"Michael",
""
],
[
"Rackson",
"Charlie",
""
]
] | We calculate the maximal non-equilibrium work that can be extracted from any mass using information about its micro-state. This is done through the use of black hole thermodynamics in the context of the thermodynamics of information. The non-equilibrium work that can be obtained by knowing the exact micro-state is foun... |
gr-qc/0102088 | Thomas Filk | Thomas Filk | Proper time and Minkowski structure on causal graphs | 15 pages, 4 figures | Class.Quant.Grav.18:2785-2796,2001 | 10.1088/0264-9381/18/14/311 | Freiburg preprint THEP 01/03 | gr-qc | null | For causal graphs we propose a definition of proper time which for small
scales is based on the concept of volume, while for large scales the usual
definition of length is applied. The scale where the change from "volume" to
"length" occurs is related to the size of a dynamical clock and defines a
natural cut-off for... | [
{
"created": "Tue, 20 Feb 2001 21:47:01 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Filk",
"Thomas",
""
]
] | For causal graphs we propose a definition of proper time which for small scales is based on the concept of volume, while for large scales the usual definition of length is applied. The scale where the change from "volume" to "length" occurs is related to the size of a dynamical clock and defines a natural cut-off for t... |
1603.08112 | Deng Wang | Deng Wang and Xin-He Meng | Observational constraints and differential diagnosis for cosmic
evolutionary models | null | null | null | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have proposed a plotting method based on the " natural
plotting rule " (NPR) which can be used to distinguish different cosmological
scenarios more efficiently and obtain more useful information. By using the
NPR, we have avoided the blindness to use different diagnostics when
discovering that some ... | [
{
"created": "Sat, 26 Mar 2016 14:40:58 GMT",
"version": "v1"
}
] | 2016-03-29 | [
[
"Wang",
"Deng",
""
],
[
"Meng",
"Xin-He",
""
]
] | In this paper, we have proposed a plotting method based on the " natural plotting rule " (NPR) which can be used to distinguish different cosmological scenarios more efficiently and obtain more useful information. By using the NPR, we have avoided the blindness to use different diagnostics when discovering that some sc... |
gr-qc/0612191 | Yoshiharu Tanaka | Yoshiharu Tanaka, Misao Sasaki | Gradient expansion approach to nonlinear superhorizon perturbations | 15 pages, no figures. V2: minor changes, typos corrected; V3:Section
I, Introduction and minor change to match version to appear in Prog. Theor.
Phys. | Prog.Theor.Phys.117:633-654,2007 | 10.1143/PTP.117.633 | YITP-06-69 | gr-qc astro-ph hep-th | null | Using the gradient expansion approach, we formulate a nonlinear cosmological
perturbation theory on super-horizon scales valid to $O(\epsilon^2)$, where
$\epsilon$ is the expansion parameter associated with a spatial derivative. For
simplicity, we focus on the case of a single perfect fluid, but we take into
account ... | [
{
"created": "Fri, 29 Dec 2006 15:15:18 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Jan 2007 07:45:01 GMT",
"version": "v2"
},
{
"created": "Sat, 31 Mar 2007 12:18:58 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Tanaka",
"Yoshiharu",
""
],
[
"Sasaki",
"Misao",
""
]
] | Using the gradient expansion approach, we formulate a nonlinear cosmological perturbation theory on super-horizon scales valid to $O(\epsilon^2)$, where $\epsilon$ is the expansion parameter associated with a spatial derivative. For simplicity, we focus on the case of a single perfect fluid, but we take into account no... |
1804.09573 | Lee Smolin | Stephon Alexander and Lee Smolin | The Equivalence Principle and the Emergence of Flat Rotation Curves | 10 pages LaTeX | null | null | null | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explain flat rotation curves and the baryonic Tully-Fisher relation by a
combination of three hypotheses. The first is a formulation of the equivalence
principle for gravitationally bound quantum $N$ body systems, while the second
is a second order phase transition hypothesized to arise from a competition
between ... | [
{
"created": "Wed, 25 Apr 2018 13:53:13 GMT",
"version": "v1"
}
] | 2018-04-26 | [
[
"Alexander",
"Stephon",
""
],
[
"Smolin",
"Lee",
""
]
] | We explain flat rotation curves and the baryonic Tully-Fisher relation by a combination of three hypotheses. The first is a formulation of the equivalence principle for gravitationally bound quantum $N$ body systems, while the second is a second order phase transition hypothesized to arise from a competition between th... |
gr-qc/0309119 | Charles Hellaby | Andrzej Krasinski and Charles Hellaby | Formation of a galaxy with a central black hole in the Lemaitre-Tolman
model | REVTeX, 22 pages including 11 figures (25 figure files). Replacement
has minor changes in response to the referee, and editorial corrections. To
appear in PRD | Phys.Rev.D69:043502,2004 | 10.1103/PhysRevD.69.043502 | uct-cosmology-03/03 | gr-qc | null | We construct two models of the formation a galaxy with a central black hole,
starting from a small initial fluctuation at recombination. This is an
application of previously developed methods to find a Lemaitre-Tolman model
that evolves from a given initial density or velocity profile to a given final
density profile... | [
{
"created": "Thu, 25 Sep 2003 11:07:59 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Jan 2004 14:19:31 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Krasinski",
"Andrzej",
""
],
[
"Hellaby",
"Charles",
""
]
] | We construct two models of the formation a galaxy with a central black hole, starting from a small initial fluctuation at recombination. This is an application of previously developed methods to find a Lemaitre-Tolman model that evolves from a given initial density or velocity profile to a given final density profile. ... |
2103.04627 | Soham Bhattacharyya | Soham Bhattacharyya | The Equivalence and/or the Effacing principle in $ f\left(R\right) $
theories of gravity | 15 pages. Version as accepted in the European Physical Journal C | null | 10.1140/epjc/s10052-022-10574-9 | null | gr-qc astro-ph.GA hep-th | http://creativecommons.org/licenses/by/4.0/ | The Einstein-Hilbert action of general theory of relativity (GR) is the
integral of the scalar curvature $R$. It is a theory that is drawn from the
Equivalence principle, and has predictions that come out as a consequence of
the principle, in observables. Testing such observables to find
confirmation/infirmation of t... | [
{
"created": "Mon, 8 Mar 2021 09:24:24 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Jan 2022 09:14:02 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Jul 2022 05:08:38 GMT",
"version": "v3"
}
] | 2022-07-15 | [
[
"Bhattacharyya",
"Soham",
""
]
] | The Einstein-Hilbert action of general theory of relativity (GR) is the integral of the scalar curvature $R$. It is a theory that is drawn from the Equivalence principle, and has predictions that come out as a consequence of the principle, in observables. Testing such observables to find confirmation/infirmation of the... |
1105.0749 | Domenico Giulini J.W. | Domenico Giulini | Equivalence principle, quantum mechanics, and atom-interferometric tests | 26 pages, 3 figures. Written up version of a talk delivered on
October 1st 2010 at the Regensburg conference on Quantum Field Theory and
Gravity. Version 2: references updated and typos eliminated | In: F. Finster et al. (editors), Quantum Field Theory and Gravity,
pp. 345-370, Birkhaeuser series, Springer Verlag, Basel, 2012 | null | null | gr-qc math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | That gravitation can be understood as purely metric phenomenon depends
crucially on the validity of a number of hypotheses which are summarised by the
Einstein Equivalence Principle, the least well tested part of which being the
Universality of Gravitational Redshift. A recent and currently widely debated
proposal (N... | [
{
"created": "Wed, 4 May 2011 07:56:53 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Dec 2011 16:22:31 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Giulini",
"Domenico",
""
]
] | That gravitation can be understood as purely metric phenomenon depends crucially on the validity of a number of hypotheses which are summarised by the Einstein Equivalence Principle, the least well tested part of which being the Universality of Gravitational Redshift. A recent and currently widely debated proposal (Nat... |
gr-qc/0503064 | Satsuki Shimono | Satsuki Shimono, Takeshi Chiba | Numerical Solutions of Inflating Higher Dimensional Global Defects | 6 pages, 7 figures, ReVTeX4, Accepted for publication in PRD | Phys.Rev. D71 (2005) 084002 | 10.1103/PhysRevD.71.084002 | null | gr-qc astro-ph hep-th | null | We find numerical solutions of Einstein equations and scalar field equation
for a global defect in higher dimensional spacetimes ($\geq 6$). We examine in
detail the relation among the expansion rate $H$ and the symmetry-breaking
scale $\eta$ and the number of extra dimensions $n$ for these solutions. We
find that ev... | [
{
"created": "Tue, 15 Mar 2005 07:43:04 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Mar 2005 14:30:14 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Shimono",
"Satsuki",
""
],
[
"Chiba",
"Takeshi",
""
]
] | We find numerical solutions of Einstein equations and scalar field equation for a global defect in higher dimensional spacetimes ($\geq 6$). We examine in detail the relation among the expansion rate $H$ and the symmetry-breaking scale $\eta$ and the number of extra dimensions $n$ for these solutions. We find that even... |
1801.01787 | Ryotaro Kase | Ryotaro Kase, Masato Minamitsuji, Shinji Tsujikawa, and Ying-li Zhang | Black hole perturbations in vector-tensor theories: The odd-mode
analysis | 26 pages, 4 figures, published version | JCAP02(2018)048 | 10.1088/1475-7516/2018/02/048 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In generalized Proca theories with vector-field derivative couplings, a bunch
of hairy black hole solutions have been derived on a static and spherically
symmetric background. In this paper, we formulate the odd-parity black hole
perturbations in generalized Proca theories by expanding the corresponding
action up to ... | [
{
"created": "Fri, 5 Jan 2018 15:17:45 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Feb 2018 03:20:48 GMT",
"version": "v2"
}
] | 2018-02-27 | [
[
"Kase",
"Ryotaro",
""
],
[
"Minamitsuji",
"Masato",
""
],
[
"Tsujikawa",
"Shinji",
""
],
[
"Zhang",
"Ying-li",
""
]
] | In generalized Proca theories with vector-field derivative couplings, a bunch of hairy black hole solutions have been derived on a static and spherically symmetric background. In this paper, we formulate the odd-parity black hole perturbations in generalized Proca theories by expanding the corresponding action up to se... |
1807.10630 | Bogeun Gwak | Bogeun Gwak | Weak Cosmic Censorship Conjecture in Kerr-(Anti-)de Sitter Black Hole
with Scalar Field | 20 pages, 3 figures, published in JHEP | JHEP 1809 (2018) 081 | 10.1007/JHEP09(2018)081 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the weak cosmic censorship conjecture in Kerr-(anti-)de Sitter
black holes under the scattering of a scalar field. We test the conjecture in
terms of whether the black hole can exceed the extremal condition with respect
to its change caused by the energy and angular momentum fluxes of the scalar
field.... | [
{
"created": "Fri, 27 Jul 2018 13:58:08 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Sep 2018 10:43:44 GMT",
"version": "v2"
}
] | 2018-09-18 | [
[
"Gwak",
"Bogeun",
""
]
] | We investigate the weak cosmic censorship conjecture in Kerr-(anti-)de Sitter black holes under the scattering of a scalar field. We test the conjecture in terms of whether the black hole can exceed the extremal condition with respect to its change caused by the energy and angular momentum fluxes of the scalar field. W... |
1008.1577 | Neil J. Cornish | Tyson B. Littenberg and Neil J. Cornish | Separating Gravitational Wave Signals from Instrument Artifacts | 21 pages, 18 figures | Phys.Rev.D82:103007,2010 | 10.1103/PhysRevD.82.103007 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Central to the gravitational wave detection problem is the challenge of
separating features in the data produced by astrophysical sources from features
produced by the detector. Matched filtering provides an optimal solution for
Gaussian noise, but in practice, transient noise excursions or ``glitches''
complicate th... | [
{
"created": "Mon, 9 Aug 2010 20:00:01 GMT",
"version": "v1"
}
] | 2010-12-09 | [
[
"Littenberg",
"Tyson B.",
""
],
[
"Cornish",
"Neil J.",
""
]
] | Central to the gravitational wave detection problem is the challenge of separating features in the data produced by astrophysical sources from features produced by the detector. Matched filtering provides an optimal solution for Gaussian noise, but in practice, transient noise excursions or ``glitches'' complicate the ... |
1906.05406 | Gabriel R. Bengochea | Gabriel R. Bengochea, Gabriel Le\'on, Elias Okon, Daniel Sudarsky | Can the quantum vacuum fluctuations really solve the cosmological
constant problem? | 12 pages. Minor changes, comments added in Conclusions and new
references. Accepted for publication in EPJC | Eur. Phys. J. C 80, 18 (2020) | 10.1140/epjc/s10052-019-7554-1 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently it has been argued that a correct reading of the quantum
fluctuations of the vacuum could lead to a solution to the cosmological
constant problem. In this work we critically examine such a proposal, finding
it questionable due to conceptual and self-consistency problems, as well as
issues with the actual cal... | [
{
"created": "Wed, 12 Jun 2019 22:17:44 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Dec 2019 04:10:54 GMT",
"version": "v2"
}
] | 2020-01-15 | [
[
"Bengochea",
"Gabriel R.",
""
],
[
"León",
"Gabriel",
""
],
[
"Okon",
"Elias",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | Recently it has been argued that a correct reading of the quantum fluctuations of the vacuum could lead to a solution to the cosmological constant problem. In this work we critically examine such a proposal, finding it questionable due to conceptual and self-consistency problems, as well as issues with the actual calcu... |
1310.3124 | Herbert Balasin | Herbert Balasin | Timescape realized | 15 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a concrete proposal to realize the observer dependence of
expansion redshift employing a map that relates static to conformally static
geometries. This provides a manifest realization of Wiltshire's proposal for
observer selection which serves as a model to explain accelerated expansion
| [
{
"created": "Fri, 11 Oct 2013 13:56:45 GMT",
"version": "v1"
}
] | 2013-10-14 | [
[
"Balasin",
"Herbert",
""
]
] | We discuss a concrete proposal to realize the observer dependence of expansion redshift employing a map that relates static to conformally static geometries. This provides a manifest realization of Wiltshire's proposal for observer selection which serves as a model to explain accelerated expansion |
1310.8596 | Eugen Radu | Burkhard Kleihaus, Jutta Kunz and Eugen Radu | The Gregory-Laflamme instability and non-uniform generalizations of NUT
strings | 10 pages, 3 figures | null | 10.1016/j.physletb.2014.01.012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore via linearized perturbation theory the Gregory-Laflamme
instability of the NUT string (i.e the D=4 Lorentzian NUT solution uplifted to
five dimensions). Our results indicate that the Gregory-Laflamme instability
persists in the presence of a NUT charge $n$, the critical length of the
extra-dimension increa... | [
{
"created": "Thu, 31 Oct 2013 17:11:06 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Radu",
"Eugen",
""
]
] | We explore via linearized perturbation theory the Gregory-Laflamme instability of the NUT string (i.e the D=4 Lorentzian NUT solution uplifted to five dimensions). Our results indicate that the Gregory-Laflamme instability persists in the presence of a NUT charge $n$, the critical length of the extra-dimension increasi... |
1609.03159 | Kevin Croker | K.A.S. Croker | A Smolin-like branching multiverse from multiscalar-tensor theory | 14 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We implement a Smolin-like branching multiverse through a directed, acyclic
graph of $N$ metrics. Our gravitational and matter actions are
indistinguishable from $N$ decoupled statements of General Relativity, if one
varies with respect to metric degrees of freedom. We replace $N-1$ metrics with
scalar fields by conf... | [
{
"created": "Sun, 11 Sep 2016 13:22:08 GMT",
"version": "v1"
}
] | 2016-09-13 | [
[
"Croker",
"K. A. S.",
""
]
] | We implement a Smolin-like branching multiverse through a directed, acyclic graph of $N$ metrics. Our gravitational and matter actions are indistinguishable from $N$ decoupled statements of General Relativity, if one varies with respect to metric degrees of freedom. We replace $N-1$ metrics with scalar fields by confor... |
gr-qc/9903071 | Manoelito M. de Souza | Manoelito M. de Souza, Robson N. Silveira | Gauss vs Coulomb and the Cosmological Mass-deficit Problem | 7 pages 1 ps figure | null | null | null | gr-qc astro-ph hep-th | null | In a previous work General Relativity has been presented as a microscopic
theory of finite and discrete point-like fields that we associate to a
classical description of gravitons. The standard macroscopic continuous field
is retrieved as an average-valued field through an integration over these
gravitons. Here we di... | [
{
"created": "Thu, 18 Mar 1999 20:40:12 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Souza",
"Manoelito M.",
""
],
[
"Silveira",
"Robson N.",
""
]
] | In a previous work General Relativity has been presented as a microscopic theory of finite and discrete point-like fields that we associate to a classical description of gravitons. The standard macroscopic continuous field is retrieved as an average-valued field through an integration over these gravitons. Here we disc... |
1412.5803 | Nicolas Chamel | N. Chamel | On the Lie subalgebra of Killing-Milne and Killing-Cartan vector fields
in Newtonian space-time | 8 pages | Int. J. Mod. Phys. D24, No. 2 (2015) 1550018 | 10.1142/S0218271815500182 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Galilean (and more generally Milne) invariance of Newtonian theory allows
for Killing vector fields of a general kind, whereby the Lie derivative of a
field is not required to vanish but only to be cancellable by some
infinitesimal Galilean (respectively Milne) gauge transformation. In this
paper, it is shown tha... | [
{
"created": "Thu, 18 Dec 2014 11:07:10 GMT",
"version": "v1"
}
] | 2014-12-19 | [
[
"Chamel",
"N.",
""
]
] | The Galilean (and more generally Milne) invariance of Newtonian theory allows for Killing vector fields of a general kind, whereby the Lie derivative of a field is not required to vanish but only to be cancellable by some infinitesimal Galilean (respectively Milne) gauge transformation. In this paper, it is shown that ... |
2009.00043 | Neil J. Cornish | Neil J. Cornish | Time-Frequency Analysis of Gravitational Wave Data | 20 pages, 22 figures | null | 10.1103/PhysRevD.102.124038 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Data from gravitational wave detectors are recorded as time series that
include contributions from myriad noise sources in addition to any
gravitational wave signals. When regularly sampled data are available, such as
for ground based and future space based interferometers, analyses are typically
performed in the fre... | [
{
"created": "Mon, 31 Aug 2020 18:22:27 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Oct 2020 20:09:19 GMT",
"version": "v2"
}
] | 2020-12-23 | [
[
"Cornish",
"Neil J.",
""
]
] | Data from gravitational wave detectors are recorded as time series that include contributions from myriad noise sources in addition to any gravitational wave signals. When regularly sampled data are available, such as for ground based and future space based interferometers, analyses are typically performed in the frequ... |
1302.1762 | Steven Willison | Steven Willison | AdS spacetimes and isometric embeddings | To appear in the proceedings of the conference: "Relativity and
Gravitation, 100 Years after Einstein in Prague." We give a brief review of
the results obtained in [arXiv:1011.3883[gr-qc]]. Lemma 2.2, is a new result | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An algebraic global isometric embedding of the nonrotating BTZ black hole is
presented. The ambient spacetime is $\mathbb{M}^{2,3}$, the 3+2 dimensional
flat spacetime. We also present the analogous embedding for the Euclidean BTZ
spacetime and by performing a kind of double analytic continuation construct a
1-parame... | [
{
"created": "Thu, 7 Feb 2013 14:37:51 GMT",
"version": "v1"
}
] | 2013-02-08 | [
[
"Willison",
"Steven",
""
]
] | An algebraic global isometric embedding of the nonrotating BTZ black hole is presented. The ambient spacetime is $\mathbb{M}^{2,3}$, the 3+2 dimensional flat spacetime. We also present the analogous embedding for the Euclidean BTZ spacetime and by performing a kind of double analytic continuation construct a 1-paramete... |
1912.01971 | Caio Ribeiro | C. C. H. Ribeiro and D. A. T. Vanzella | Analogues of gravity-induced instabilities in anisotropic metamaterials | null | Phys. Rev. Research 2, 013281 (2020) | 10.1103/PhysRevResearch.2.013281 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of field theory in curved spacetimes, it is known that
suitable background spacetime geometries can trigger instabilities of fields,
leading to exponential growth of their (quantum and classical) fluctuations ---
a phenomenon called $\textit{vacuum awakening}$ in the quantum context, which
in some clas... | [
{
"created": "Wed, 4 Dec 2019 13:42:14 GMT",
"version": "v1"
}
] | 2020-03-18 | [
[
"Ribeiro",
"C. C. H.",
""
],
[
"Vanzella",
"D. A. T.",
""
]
] | In the context of field theory in curved spacetimes, it is known that suitable background spacetime geometries can trigger instabilities of fields, leading to exponential growth of their (quantum and classical) fluctuations --- a phenomenon called $\textit{vacuum awakening}$ in the quantum context, which in some classi... |
2406.12933 | Michael Gammon | Michael Gammon, Robert B. Mann, Sarah Rourke | Charged Quark Stars and Extreme Compact Objects in Regularized 4D
Einstein-Gauss-Bonnet Gravity | arXiv admin note: substantial text overlap with arXiv:2309.00703 | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Since the derivation of a well-defined $D\rightarrow 4$ limit for 4
dimensional Einstein Gauss-Bonnet (4DEGB) gravity coupled to a scalar field,
there has been interest in testing it as an alternative to Einstein's general
theory of relativity. Using the Tolman-Oppenheimer-Volkoff (TOV) equations
modified for charge ... | [
{
"created": "Sun, 16 Jun 2024 20:28:09 GMT",
"version": "v1"
}
] | 2024-06-21 | [
[
"Gammon",
"Michael",
""
],
[
"Mann",
"Robert B.",
""
],
[
"Rourke",
"Sarah",
""
]
] | Since the derivation of a well-defined $D\rightarrow 4$ limit for 4 dimensional Einstein Gauss-Bonnet (4DEGB) gravity coupled to a scalar field, there has been interest in testing it as an alternative to Einstein's general theory of relativity. Using the Tolman-Oppenheimer-Volkoff (TOV) equations modified for charge an... |
gr-qc/0511154 | Jeffrey Winicour | Maria C. Babiuc, Bela Szilagyi and Jeffrey Winicour | Testing numerical relativity with the shifted gauge wave | Submitted to special numerical relativity issue of Classical and
Quantum Gravity | Class.Quant.Grav.23:S319-S342,2006 | 10.1088/0264-9381/23/16/S03 | null | gr-qc | null | Computational methods are essential to provide waveforms from coalescing
black holes, which are expected to produce strong signals for the gravitational
wave observatories being developed. Although partial simulations of the
coalescence have been reported, scientifically useful waveforms have so far not
been delivere... | [
{
"created": "Tue, 29 Nov 2005 09:45:12 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Feb 2006 22:22:41 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Babiuc",
"Maria C.",
""
],
[
"Szilagyi",
"Bela",
""
],
[
"Winicour",
"Jeffrey",
""
]
] | Computational methods are essential to provide waveforms from coalescing black holes, which are expected to produce strong signals for the gravitational wave observatories being developed. Although partial simulations of the coalescence have been reported, scientifically useful waveforms have so far not been delivered.... |
1904.03502 | Dimitris Kallifatides | Dimitris S. Kallifatides | Primordial Black Hole Remnants as Dark Energy and an Instability of De
Sitter Space towards Power-Law Accelerating Expansion | 19 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from a discussion of the black hole information loss paradox, we
argue that Primordial Black Hole Remnants (PBHRs) of Planck mass, should they
exist, are a plausible candidate for dark energy. We call this proposal the
PBHR model. We also find an instability of de Sitter space towards a space with
power-law ... | [
{
"created": "Sat, 6 Apr 2019 17:44:01 GMT",
"version": "v1"
}
] | 2019-04-09 | [
[
"Kallifatides",
"Dimitris S.",
""
]
] | Starting from a discussion of the black hole information loss paradox, we argue that Primordial Black Hole Remnants (PBHRs) of Planck mass, should they exist, are a plausible candidate for dark energy. We call this proposal the PBHR model. We also find an instability of de Sitter space towards a space with power-law ac... |
0802.3712 | David Garfinkle | David Garfinkle, Greg Comer | Matters of Gravity, The Newsletter of the Topical Group in Gravitation
of the American Physical Society, Volume 31, Winter 2008 | 14 pages, latex | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | GGR News: GGR program at the APS meeting in St. Louis we hear that... by
David Garfinkle 100 years ago, by David Garfinkle
Research Briefs: The Torsion Pendulum's Contribution to Dark Energy, by Bill
Hamilton
Conference Reports: 10th Capra Meeting on Radiation Reaction, by Carlos
Sopuerta Quantum Gravity in the S... | [
{
"created": "Mon, 25 Feb 2008 22:38:44 GMT",
"version": "v1"
}
] | 2008-02-27 | [
[
"Garfinkle",
"David",
""
],
[
"Comer",
"Greg",
""
]
] | GGR News: GGR program at the APS meeting in St. Louis we hear that... by David Garfinkle 100 years ago, by David Garfinkle Research Briefs: The Torsion Pendulum's Contribution to Dark Energy, by Bill Hamilton Conference Reports: 10th Capra Meeting on Radiation Reaction, by Carlos Sopuerta Quantum Gravity in the Souther... |
1903.00990 | Thomas P. Kling | Thomas Kling, Eric Grotzke, Kevin Roebuck, Harry Waite | Examining the Kerr Metric through Wave Fronts of Null Geodesics | This is a post-peer-review, pre-copyedit version of an article
published in General Relativity and Gravitation. The final authenticated
version is available online at: https://doi.org/10.1007/s10714-019-2518-1 | General Relativity and Gravitation (2019) 51:32 | 10.1007/s10714-019-2518-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the singularities of the wave fronts of null geodesics from point
sources in the Kerr Metric. We find that the wave fronts develop a tube like
structure that collapses non-symmetrically, leading to cusp features in the
wave front singularities. As the wave front advances, the cusps trace out an
astroidal s... | [
{
"created": "Sun, 3 Mar 2019 21:10:21 GMT",
"version": "v1"
}
] | 2019-03-05 | [
[
"Kling",
"Thomas",
""
],
[
"Grotzke",
"Eric",
""
],
[
"Roebuck",
"Kevin",
""
],
[
"Waite",
"Harry",
""
]
] | We examine the singularities of the wave fronts of null geodesics from point sources in the Kerr Metric. We find that the wave fronts develop a tube like structure that collapses non-symmetrically, leading to cusp features in the wave front singularities. As the wave front advances, the cusps trace out an astroidal sha... |
gr-qc/9501003 | Lior M. Burko | Lior M. Burko, Amos Ori | Are physical objects necessarily burnt up by the blue sheet inside a
black hole? | 13 pages, ordinary LaTex. Accepted for Physical Review Letters. | Phys.Rev.Lett. 74 (1995) 1064-1066 | 10.1103/PhysRevLett.74.1064 | Technion preprint no. TECHNION-PH-94-17 | gr-qc | null | The electromagnetic radiation that falls into a Reissner-Nordstrom black hole
develops a ``blue sheet'' of infinite energy density at the Cauchy horizon. We
consider classical electromagnetic fields (that were produced during the
collapse and then backscattered into the black hole), and investigate the
blue-sheet eff... | [
{
"created": "Sun, 8 Jan 1995 08:38:52 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Burko",
"Lior M.",
""
],
[
"Ori",
"Amos",
""
]
] | The electromagnetic radiation that falls into a Reissner-Nordstrom black hole develops a ``blue sheet'' of infinite energy density at the Cauchy horizon. We consider classical electromagnetic fields (that were produced during the collapse and then backscattered into the black hole), and investigate the blue-sheet effec... |
1912.07049 | Sergey Yu. Vernov | S.Yu. Vernov, V.R. Ivanov, E.O. Pozdeeva | Superpotential method for $F(R)$ cosmological models | 10 pages, references added | Phys. Part. Nuclei 51 (2020) 744 | 10.1134/S1063779620040735 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct the $F(R)$ gravity models with exact particular solutions using
the conformal transformation and the superpotential method for the
corresponding models in the Einstein frame. The functions $F(R)$ are obtained
explicitly. We consider exact solutions for the obtained $R^2$ gravity model
with the cosmologic... | [
{
"created": "Sun, 15 Dec 2019 14:27:17 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Dec 2019 11:27:14 GMT",
"version": "v2"
}
] | 2020-10-06 | [
[
"Vernov",
"S. Yu.",
""
],
[
"Ivanov",
"V. R.",
""
],
[
"Pozdeeva",
"E. O.",
""
]
] | We construct the $F(R)$ gravity models with exact particular solutions using the conformal transformation and the superpotential method for the corresponding models in the Einstein frame. The functions $F(R)$ are obtained explicitly. We consider exact solutions for the obtained $R^2$ gravity model with the cosmological... |
1001.2886 | Lorenzo Fatibene | L. Fatibene, M. Francaviglia, S. Mercadante | Noether Symmetries and Covariant Conservation Laws in Classical,
Relativistic and Quantum Physics | 27 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the Lagrangian formulation of Noether symmetries (as well as
"generalized Noether symmetries") in the framework of Calculus of Variations in
Jet Bundles, with a special attention to so-called "Natural Theories" and
"Gauge-Natural Theories", that include all relevant Field Theories and physical
applications ... | [
{
"created": "Sun, 17 Jan 2010 10:54:45 GMT",
"version": "v1"
}
] | 2010-01-19 | [
[
"Fatibene",
"L.",
""
],
[
"Francaviglia",
"M.",
""
],
[
"Mercadante",
"S.",
""
]
] | We review the Lagrangian formulation of Noether symmetries (as well as "generalized Noether symmetries") in the framework of Calculus of Variations in Jet Bundles, with a special attention to so-called "Natural Theories" and "Gauge-Natural Theories", that include all relevant Field Theories and physical applications (f... |
0911.4932 | Kayoomars Karami | K. Karami, J. Fehri | Holographic dark energy in a non-flat universe with Granda-Oliveros
cut-off | 11 pages, 5 figures | Int.J.Theor.Phys.49:1118-1126,2010 | 10.1007/s10773-010-0291-8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by Granda and Oliveros (GO) model, we generalize their work to the
non-flat case. We obtain the evolution of the dark energy density, the
deceleration and the equation of state parameters for the holographic dark
energy model in a non-flat universe with GO cut-off. In the limiting case of a
flat universe, i... | [
{
"created": "Wed, 25 Nov 2009 18:39:14 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Nov 2009 14:52:15 GMT",
"version": "v2"
},
{
"created": "Mon, 12 Apr 2010 06:33:19 GMT",
"version": "v3"
}
] | 2014-11-20 | [
[
"Karami",
"K.",
""
],
[
"Fehri",
"J.",
""
]
] | Motivated by Granda and Oliveros (GO) model, we generalize their work to the non-flat case. We obtain the evolution of the dark energy density, the deceleration and the equation of state parameters for the holographic dark energy model in a non-flat universe with GO cut-off. In the limiting case of a flat universe, i.e... |
2205.02712 | Benrong Mu | Siyuan Hui, Benrong Mu, Yuzhou Tao, Jun Tao | Thermodynamics of the RN-AdS black hole with cloud of strings and
quintessence in stationary and free-fall frame in rainbow gravity | 14 pages, 5 figures, 1 table | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the thermodynamic properties of the RN-AdS
black hole with cloud of strings and quintessence in rainbow gravity with the
stationary (ST) orthonormal frame and the free-fall (FF) orthonormal frame.
After the SF and the FF rainbow metric is obtained, we get the Hawking
temperature and the ... | [
{
"created": "Thu, 5 May 2022 15:32:56 GMT",
"version": "v1"
}
] | 2022-05-06 | [
[
"Hui",
"Siyuan",
""
],
[
"Mu",
"Benrong",
""
],
[
"Tao",
"Yuzhou",
""
],
[
"Tao",
"Jun",
""
]
] | In this paper, we investigate the thermodynamic properties of the RN-AdS black hole with cloud of strings and quintessence in rainbow gravity with the stationary (ST) orthonormal frame and the free-fall (FF) orthonormal frame. After the SF and the FF rainbow metric is obtained, we get the Hawking temperature and the en... |
0911.5041 | Alessandro Nagar | Thibault Damour, Alessandro Nagar | Effective One Body description of tidal effects in inspiralling compact
binaries | 21 pages, 5 figures. Submitted to Phys. Rev. D | Phys.Rev.D81:084016,2010 | 10.1103/PhysRevD.81.084016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The late part of the gravitational wave signal of binary neutron star
inspirals can in principle yield crucial information on the nuclear equation of
state via its dependence on relativistic tidal parameters. In the hope of
analytically describing the gravitational wave phasing during the late inspiral
(essentially u... | [
{
"created": "Fri, 27 Nov 2009 14:53:45 GMT",
"version": "v1"
}
] | 2010-04-14 | [
[
"Damour",
"Thibault",
""
],
[
"Nagar",
"Alessandro",
""
]
] | The late part of the gravitational wave signal of binary neutron star inspirals can in principle yield crucial information on the nuclear equation of state via its dependence on relativistic tidal parameters. In the hope of analytically describing the gravitational wave phasing during the late inspiral (essentially up ... |
0908.1326 | Clovis Jacinto de Matos | Clovis Jacinto de Matos | Gravitoelectromagnetism in (Anti) de Sitter Spacetime | 12 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The presence of a non-zero cosmological term in Einstein field equations can
be interpreted as the physical possibility for preferred reference frames
without breaking of general covariance. This possibility is used in the process
of linearizing Einstein field equations in a de Sitter background, and in
formulating t... | [
{
"created": "Mon, 10 Aug 2009 14:00:45 GMT",
"version": "v1"
}
] | 2009-08-11 | [
[
"de Matos",
"Clovis Jacinto",
""
]
] | The presence of a non-zero cosmological term in Einstein field equations can be interpreted as the physical possibility for preferred reference frames without breaking of general covariance. This possibility is used in the process of linearizing Einstein field equations in a de Sitter background, and in formulating the... |
gr-qc/9503017 | Mariusz Dabrowski | Mariusz P. Dabrowski | Oscillating Friedman Cosmology | Latex file, 27 pages, figures available on request | Annals Phys.248:199-219,1996 | 10.1006/aphy.1996.0057 | null | gr-qc | null | The non-singular, oscillating Friedman cosmology within the framework of
General Relativity is considered. The general oscillatory solution given in
terms of elliptic functions and the conditions for its existence are discussed.
It is shown that the wall-like-matter and the small, but negative cosmological
constant a... | [
{
"created": "Thu, 9 Mar 1995 12:41:58 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Dabrowski",
"Mariusz P.",
""
]
] | The non-singular, oscillating Friedman cosmology within the framework of General Relativity is considered. The general oscillatory solution given in terms of elliptic functions and the conditions for its existence are discussed. It is shown that the wall-like-matter and the small, but negative cosmological constant are... |
1405.1644 | Caixia Gao | Caixia Gao, Robert H. Brandenberger, Yifu Cai, Pisin Chen | Cosmological Perturbations in Unimodular Gravity | null | null | 10.1088/1475-7516/2014/09/021 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study cosmological perturbation theory within the framework of unimodular
gravity. We show that the Lagrangian constraint on the determinant of the
metric required by unimodular gravity leads to an extra constraint on the gauge
freedom of the metric perturbations. Although the main equation of motion for
the gravi... | [
{
"created": "Wed, 7 May 2014 15:30:39 GMT",
"version": "v1"
},
{
"created": "Sat, 31 May 2014 18:29:08 GMT",
"version": "v2"
}
] | 2015-06-19 | [
[
"Gao",
"Caixia",
""
],
[
"Brandenberger",
"Robert H.",
""
],
[
"Cai",
"Yifu",
""
],
[
"Chen",
"Pisin",
""
]
] | We study cosmological perturbation theory within the framework of unimodular gravity. We show that the Lagrangian constraint on the determinant of the metric required by unimodular gravity leads to an extra constraint on the gauge freedom of the metric perturbations. Although the main equation of motion for the gravita... |
gr-qc/0306086 | Kahil | M.I.Wanas, M.Melek and M.E.Kahil | SN1987A: Temporal Models | 7 pages LaTex file, published in the Proceedings of MG IX, Vol. 2,
p.1100, World Scientific Pub.(2002) | null | null | null | gr-qc astro-ph | null | It is well known that carriers of astrophysical information are massless
spinning particles. These carriers are photons, neutrinos and, expectedly,
gravitons. All these particles are emitted during supernova events. Information
carried by these particles characterize their sources, but such information are
affected b... | [
{
"created": "Thu, 19 Jun 2003 10:55:58 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wanas",
"M. I.",
""
],
[
"Melek",
"M.",
""
],
[
"Kahil",
"M. E.",
""
]
] | It is well known that carriers of astrophysical information are massless spinning particles. These carriers are photons, neutrinos and, expectedly, gravitons. All these particles are emitted during supernova events. Information carried by these particles characterize their sources, but such information are affected by ... |
1403.3074 | Ion I. Cotaescu | Ion I. Cotaescu | Accelerated frames in de Sitter spacetime | 5 pages no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a definition of the accelerated frames in de Sitter spacetime
whose metric recovers the Rindler approach in the flat limit. Unfortunately,
this metric has no a satisfactory limit for vanishing acceleration such that
its physical meaning remains obscure.
| [
{
"created": "Tue, 11 Mar 2014 16:15:33 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Mar 2014 06:37:57 GMT",
"version": "v2"
},
{
"created": "Fri, 30 May 2014 16:02:47 GMT",
"version": "v3"
},
{
"created": "Fri, 11 Jul 2014 07:48:42 GMT",
"version": "v4"
},
{
"c... | 2014-07-18 | [
[
"Cotaescu",
"Ion I.",
""
]
] | We propose a definition of the accelerated frames in de Sitter spacetime whose metric recovers the Rindler approach in the flat limit. Unfortunately, this metric has no a satisfactory limit for vanishing acceleration such that its physical meaning remains obscure. |
2111.01828 | Pierre-Henri Chavanis | Pierre-Henri Chavanis | Cosmological models based on a complex scalar field with a power-law
potential associated with a polytropic equation of state | null | null | 10.1103/PhysRevD.106.043502 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct cosmological models based on a complex scalar field with a
power-law potential
$V=\frac{K}{\gamma-1}(\frac{m}{\hbar})^{2\gamma}|\varphi|^{2\gamma}$ associated
with a polytropic equation of state $P=K\rho^{\gamma}$ (the potential
associated with an isothermal equation of state $P=\rho k_B T/m$ is $V=\frac... | [
{
"created": "Tue, 2 Nov 2021 18:27:48 GMT",
"version": "v1"
}
] | 2022-08-17 | [
[
"Chavanis",
"Pierre-Henri",
""
]
] | We construct cosmological models based on a complex scalar field with a power-law potential $V=\frac{K}{\gamma-1}(\frac{m}{\hbar})^{2\gamma}|\varphi|^{2\gamma}$ associated with a polytropic equation of state $P=K\rho^{\gamma}$ (the potential associated with an isothermal equation of state $P=\rho k_B T/m$ is $V=\frac{m... |
2303.04399 | Sayantani Datta | Sayantani Datta | Enhancing the performance of multiparameter tests of general relativity
with LISA using Principal Component Analysis | null | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Laser Interferometer Space Antenna (LISA) will provide us with a unique
opportunity to observe the early inspiral phase of supermassive binary black
holes (SMBBHs) in the mass range of $10^5-10^6\,M_{\odot}$, that lasts for
several years. It will also detect the merger and ringdown phases of these
sources. Theref... | [
{
"created": "Wed, 8 Mar 2023 06:20:17 GMT",
"version": "v1"
}
] | 2023-03-09 | [
[
"Datta",
"Sayantani",
""
]
] | The Laser Interferometer Space Antenna (LISA) will provide us with a unique opportunity to observe the early inspiral phase of supermassive binary black holes (SMBBHs) in the mass range of $10^5-10^6\,M_{\odot}$, that lasts for several years. It will also detect the merger and ringdown phases of these sources. Therefor... |
1601.01262 | Ondrej Kop\'a\v{c}ek | Ond\v{r}ej Kop\'a\v{c}ek, Vladim\'ir Karas, Ji\v{r}\'i Kov\'a\v{r} and
Zden\v{e}k Stuchl\'ik | Application of a symplectic integrator in a non-integrable relativistic
system | 11 pages, 5 figures, 2 tables, prepared in 2011 for the Proceedings
of RAGtime 10-13: Workshops on black holes and neutron stars (Opava,
September 15 - 17, 2010) | in Proc. of RAGtime 10-13, eds. Z. Stuchl\'{i}k, G. T\"{o}r\"{o}k,
T. Pech\'{a}\v{c}ek, 2014 (Silesian University in Opava), pp. 123-132, ISBN
978-80-7510-125-9 | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a detailed comparison of several integration schemes applied to
the dynamic system consisting of a charged particle on the Kerr background
endowed with the axisymmetric electromagnetic test field. In particular, we
compare the performance of the symplectic integrator with several
non-symplectic routines an... | [
{
"created": "Sun, 3 Jan 2016 23:17:18 GMT",
"version": "v1"
}
] | 2018-03-02 | [
[
"Kopáček",
"Ondřej",
""
],
[
"Karas",
"Vladimír",
""
],
[
"Kovář",
"Jiří",
""
],
[
"Stuchlík",
"Zdeněk",
""
]
] | We present a detailed comparison of several integration schemes applied to the dynamic system consisting of a charged particle on the Kerr background endowed with the axisymmetric electromagnetic test field. In particular, we compare the performance of the symplectic integrator with several non-symplectic routines and ... |
gr-qc/0607013 | Jan Ambjorn | J. Ambjorn, R. Janik, W. Westra and S. Zohren | The emergence of background geometry from quantum fluctuations | 12 pages | Phys.Lett. B641 (2006) 94-98 | 10.1016/j.physletb.2006.08.021 | null | gr-qc hep-th | null | We show how the quantization of two-dimensional gravity leads to an
(Euclidean) quantum space-time where the average geometry is that of constant
negative curvature and where the Hartle-Hawking boundary condition arises
naturally.
| [
{
"created": "Tue, 4 Jul 2006 20:13:11 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Ambjorn",
"J.",
""
],
[
"Janik",
"R.",
""
],
[
"Westra",
"W.",
""
],
[
"Zohren",
"S.",
""
]
] | We show how the quantization of two-dimensional gravity leads to an (Euclidean) quantum space-time where the average geometry is that of constant negative curvature and where the Hartle-Hawking boundary condition arises naturally. |
2306.15982 | Dirk Puetzfeld | Peter A. Hogan, Dirk Puetzfeld | Plane fronted electromagnetic waves and an asymptotic limit of
Li\'enard--Wiechert fields | 11 pages, 2 figures | Int. J. Mod. Phys. D, Vol. 33, No. 02, 2450009 (2024) | 10.1142/S0218271824500093 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Colliding or noncolliding plane fronted electromagnetic or gravitational
waves are the asymptotic limit of Robinson--Trautman spherical electromagnetic
or gravitational waves. Noncolliding plane fronted waves contain no information
about their sources whereas colliding waves contain information about possibly
the mot... | [
{
"created": "Wed, 28 Jun 2023 07:35:47 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Apr 2024 17:36:26 GMT",
"version": "v2"
}
] | 2024-04-03 | [
[
"Hogan",
"Peter A.",
""
],
[
"Puetzfeld",
"Dirk",
""
]
] | Colliding or noncolliding plane fronted electromagnetic or gravitational waves are the asymptotic limit of Robinson--Trautman spherical electromagnetic or gravitational waves. Noncolliding plane fronted waves contain no information about their sources whereas colliding waves contain information about possibly the motio... |
2107.02441 | Stefan Czimek | Stefanos Aretakis, Stefan Czimek, Igor Rodnianski | The characteristic gluing problem for the Einstein equations and
applications | 31 pages, 12 figures | null | null | null | gr-qc math-ph math.AP math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we introduce the characteristic gluing problem for the Einstein
vacuum equations. We present a codimension-$10$ gluing construction for
characteristic initial data which are close to the Minkowski data and we show
that the $10$-dimensional obstruction space consists of gauge-invariant charges
which are ... | [
{
"created": "Tue, 6 Jul 2021 07:39:14 GMT",
"version": "v1"
}
] | 2021-07-07 | [
[
"Aretakis",
"Stefanos",
""
],
[
"Czimek",
"Stefan",
""
],
[
"Rodnianski",
"Igor",
""
]
] | In this paper we introduce the characteristic gluing problem for the Einstein vacuum equations. We present a codimension-$10$ gluing construction for characteristic initial data which are close to the Minkowski data and we show that the $10$-dimensional obstruction space consists of gauge-invariant charges which are co... |
gr-qc/0406002 | Oleg Karpov | O.B. Karpov | The Papapetrou equations and supplementary conditions | 7 pages, Latex2e, amsmath, to appear in Grav. Cosmol | null | null | null | gr-qc | null | On the bases of the Papapetrou equations with various supplementary
conditions and other approaches a comparative analysis of the equations of
motion of rotating bodies in general relativity is made. The motion of a body
with vertical spin in a circular orbit is considered. An expression for the
spin-orbit force in a... | [
{
"created": "Tue, 1 Jun 2004 19:29:22 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Jun 2004 07:03:06 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Karpov",
"O. B.",
""
]
] | On the bases of the Papapetrou equations with various supplementary conditions and other approaches a comparative analysis of the equations of motion of rotating bodies in general relativity is made. The motion of a body with vertical spin in a circular orbit is considered. An expression for the spin-orbit force in a p... |
2106.02236 | Yujie Tan | Pan-Pan Wang, Yu-Jie Tan, Wei-Liang Qian and Cheng-Gang Shao | Refined clock-jitter reduction in the Sagnac-type time-delay
interferometry combinations | null | Phys. Rev. D 104, 082002 (2021) | 10.1103/PhysRevD.104.082002 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The ongoing development of the space-based laser interferometer missions is
aiming at unprecedented gravitational wave detections in the millihertz
frequency band. The spaceborne nature of the experimental setups leads to a
degree of subtlety regarding the otherwise overwhelming laser frequency noise.
The cancellatio... | [
{
"created": "Fri, 4 Jun 2021 03:36:37 GMT",
"version": "v1"
}
] | 2021-10-04 | [
[
"Wang",
"Pan-Pan",
""
],
[
"Tan",
"Yu-Jie",
""
],
[
"Qian",
"Wei-Liang",
""
],
[
"Shao",
"Cheng-Gang",
""
]
] | The ongoing development of the space-based laser interferometer missions is aiming at unprecedented gravitational wave detections in the millihertz frequency band. The spaceborne nature of the experimental setups leads to a degree of subtlety regarding the otherwise overwhelming laser frequency noise. The cancellation ... |
0806.2702 | Christian Corda | Christian Corda | "Magnetic" components of gravitational waves and response functions of
interferometers | Review commissioned by Nova Science Publishers, to appear in the
edited collection "Interferometers: Research, Technology and Applications" | Handbook of Interferometers... ISBN 978-1-60741-050-8 c 2009 Nova
Science Publishers, Inc. Editors: D. Halsey and W. Raynor, pp. 23-53 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, arising from an enlighting analysis of Baskaran and Grishchuk in
Class. Quant. Grav. 21, 4041-4061 (2004), some papers in the literature have
shown the presence and importance of the so-called "magnetic" components of
gravitational waves (GWs), which have to be taken into account in the context
of the total... | [
{
"created": "Tue, 17 Jun 2008 05:45:30 GMT",
"version": "v1"
}
] | 2010-01-25 | [
[
"Corda",
"Christian",
""
]
] | Recently, arising from an enlighting analysis of Baskaran and Grishchuk in Class. Quant. Grav. 21, 4041-4061 (2004), some papers in the literature have shown the presence and importance of the so-called "magnetic" components of gravitational waves (GWs), which have to be taken into account in the context of the total r... |
2407.16414 | Leigh Smith | Leigh Smith, Sayantan Ghosh, Jiyoon Sun, V. Gayathri, Ik Siong Heng,
Archana Pai | The enhancement of Gaussian mixture modelling as an application to the
coherent WaveBurst algorithm in the search for short gravitational wave
transients | 14 pages, 8 figures | null | null | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | We present an enhanced method for the application of Gaussian Mixture
Modelling (GMM) to the coherent WaveBurst (cWB) algorithm in the search for
short-duration gravitational wave (GW) transients. The supervised Machine
Learning method of GMM allows for the multi-dimensional distributions of noise
and signal to be mo... | [
{
"created": "Tue, 23 Jul 2024 11:58:10 GMT",
"version": "v1"
}
] | 2024-07-24 | [
[
"Smith",
"Leigh",
""
],
[
"Ghosh",
"Sayantan",
""
],
[
"Sun",
"Jiyoon",
""
],
[
"Gayathri",
"V.",
""
],
[
"Heng",
"Ik Siong",
""
],
[
"Pai",
"Archana",
""
]
] | We present an enhanced method for the application of Gaussian Mixture Modelling (GMM) to the coherent WaveBurst (cWB) algorithm in the search for short-duration gravitational wave (GW) transients. The supervised Machine Learning method of GMM allows for the multi-dimensional distributions of noise and signal to be mode... |
gr-qc/0301120 | Lee Lindblom | Lee Lindblom and Mark A. Scheel | Dynamical Gauge Conditions for the Einstein Evolution Equations | New appendix on constraint evolution added | Phys.Rev. D67 (2003) 124005 | 10.1103/PhysRevD.67.124005 | null | gr-qc | null | The Einstein evolution equations have been written in a number of symmetric
hyperbolic forms when the gauge fields--the densitized lapse and the shift--are
taken to be fixed functions of the coordinates. Extended systems of evolution
equations are constructed here by adding the gauge degrees of freedom to the
set of ... | [
{
"created": "Wed, 29 Jan 2003 20:58:32 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Apr 2003 23:13:04 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Lindblom",
"Lee",
""
],
[
"Scheel",
"Mark A.",
""
]
] | The Einstein evolution equations have been written in a number of symmetric hyperbolic forms when the gauge fields--the densitized lapse and the shift--are taken to be fixed functions of the coordinates. Extended systems of evolution equations are constructed here by adding the gauge degrees of freedom to the set of dy... |
1103.4765 | Martin Reiris | Martin Reiris | Static solutions from the point of view of comparison geometry | 41 pages | null | 10.1063/1.3668045 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze (the harmonic map representation of) static solutions of the
Einstein Equations in dimension three from the point of view of comparison
geometry. We find simple monotonic quantities capturing sharply the influence
of the Lapse function on the focussing of geodesics. This allows, in
particular, a sharp esti... | [
{
"created": "Thu, 24 Mar 2011 13:45:01 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Reiris",
"Martin",
""
]
] | We analyze (the harmonic map representation of) static solutions of the Einstein Equations in dimension three from the point of view of comparison geometry. We find simple monotonic quantities capturing sharply the influence of the Lapse function on the focussing of geodesics. This allows, in particular, a sharp estima... |
1712.08148 | Boris Bolliet | Ivan Agullo, Boris Bolliet, V. Sreenath | Non-Gaussianity in Loop Quantum Cosmology | Minor updates: current version matches the accepted PRD manuscript | Phys. Rev. D 97, 066021 (2018) | 10.1103/PhysRevD.97.066021 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the phenomenology of loop quantum cosmology (LQC) to second order
in perturbations. Our motivation is twofold. On the one hand, since LQC
predicts a cosmic bounce that takes place at the Planck scale, the second order
contributions could be large enough to jeopardize the validity of the
perturbative expansi... | [
{
"created": "Thu, 21 Dec 2017 18:37:22 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Jan 2018 15:42:49 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Feb 2018 12:43:08 GMT",
"version": "v3"
}
] | 2018-04-04 | [
[
"Agullo",
"Ivan",
""
],
[
"Bolliet",
"Boris",
""
],
[
"Sreenath",
"V.",
""
]
] | We extend the phenomenology of loop quantum cosmology (LQC) to second order in perturbations. Our motivation is twofold. On the one hand, since LQC predicts a cosmic bounce that takes place at the Planck scale, the second order contributions could be large enough to jeopardize the validity of the perturbative expansion... |
1303.4462 | Hiromi Saida | Hiromi Saida | Nontriviality in Black Hole Thermodynamics: towards physically and
mathematically rigorous foundation as phenomenology | Submitted to Prog.Theor.Exp.Phys.(PTEP), 35 pages, 7figures | null | null | null | gr-qc cond-mat.stat-mech hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Comparing black hole thermodynamics with the axiomatic formulation of
thermodynamics for laboratory systems, it is found that some basic assumptions
(required by experimental facts) in laboratory thermodynamics do not hold for
black hole thermodynamics. Hence, at present, it is not obvious whether black
hole thermody... | [
{
"created": "Tue, 19 Mar 2013 01:09:17 GMT",
"version": "v1"
}
] | 2013-03-20 | [
[
"Saida",
"Hiromi",
""
]
] | Comparing black hole thermodynamics with the axiomatic formulation of thermodynamics for laboratory systems, it is found that some basic assumptions (required by experimental facts) in laboratory thermodynamics do not hold for black hole thermodynamics. Hence, at present, it is not obvious whether black hole thermodyna... |
2209.01008 | Sergey L Cherkas | Sergey L. Cherkas and Vladimir L. Kalashnikov | Vacuum polarization instead of "dark matter" in a galaxy | 16 pages, 6 figures | Universe 8(9), 456 (2022) | 10.3390/universe8090456 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We considered a vacuum polarization inside a galaxy in the eikonal
approximation and found that two possible types of polarization exist. The
first type is described by the equation of state $p=\rho/3$, similar to
radiation. Using the conformally-unimodular metric allows constructing a
nonsingular solution for this v... | [
{
"created": "Thu, 1 Sep 2022 12:21:31 GMT",
"version": "v1"
}
] | 2022-09-05 | [
[
"Cherkas",
"Sergey L.",
""
],
[
"Kalashnikov",
"Vladimir L.",
""
]
] | We considered a vacuum polarization inside a galaxy in the eikonal approximation and found that two possible types of polarization exist. The first type is described by the equation of state $p=\rho/3$, similar to radiation. Using the conformally-unimodular metric allows constructing a nonsingular solution for this vac... |
1303.6050 | Dirk Puetzfeld | Yuri N. Obukhov, Dirk Puetzfeld | Conservation laws in gravitational theories with general nonminimal
coupling | 6 pages, RevTex format | Phys. Rev. D 87, 081502 (2013) | 10.1103/PhysRevD.87.081502 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the Lagrange-Noether methods to derive the conservation laws for
models in which matter interacts nonminimally with the gravitational field. The
nonminimal coupling function can depend arbitrarily on the gravitational field
strength. The obtained result generalizes earlier findings. The generalized
conservatio... | [
{
"created": "Mon, 25 Mar 2013 08:32:45 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Apr 2013 08:16:38 GMT",
"version": "v2"
}
] | 2013-04-19 | [
[
"Obukhov",
"Yuri N.",
""
],
[
"Puetzfeld",
"Dirk",
""
]
] | We use the Lagrange-Noether methods to derive the conservation laws for models in which matter interacts nonminimally with the gravitational field. The nonminimal coupling function can depend arbitrarily on the gravitational field strength. The obtained result generalizes earlier findings. The generalized conservation ... |
gr-qc/9602028 | Winfried Zimdahl | Josep Triginer, Winfried Zimdahl, Diego Pavon | Kinetic theory for particle production | 19 pages, Latex file, to appear in Class.Quantum Grav | Class.Quant.Grav. 13 (1996) 403-416 | 10.1088/0264-9381/13/3/008 | null | gr-qc astro-ph | null | Recently, the phenomenological description of cosmological particle
production processes in terms of effective viscous pressures has attracted some
attention. Using a simple creation rate model we discuss the question to what
extent this approach is compatible with the kinetic theory of a relativistic
gas. We find th... | [
{
"created": "Tue, 13 Feb 1996 13:05:46 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Triginer",
"Josep",
""
],
[
"Zimdahl",
"Winfried",
""
],
[
"Pavon",
"Diego",
""
]
] | Recently, the phenomenological description of cosmological particle production processes in terms of effective viscous pressures has attracted some attention. Using a simple creation rate model we discuss the question to what extent this approach is compatible with the kinetic theory of a relativistic gas. We find the ... |
2012.04140 | Irvin Martinez | Irvin Martinez and Amanda Weltman | Effective field theory for compact object evolution in binary inspirals | 20 pages, 8 figures. Improved GW extraction and deepened discussion | null | null | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Using the effective field theory framework for extended objects we describe
the evolution of spinning compact objects in the late inspiral of the
coalescence of a binary, before the plunge and merger, by including leading
order corrections due to spin, tides, dissipation and gravitational wave
radiation. Our implemen... | [
{
"created": "Tue, 8 Dec 2020 00:59:44 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jan 2022 17:24:01 GMT",
"version": "v2"
}
] | 2022-01-07 | [
[
"Martinez",
"Irvin",
""
],
[
"Weltman",
"Amanda",
""
]
] | Using the effective field theory framework for extended objects we describe the evolution of spinning compact objects in the late inspiral of the coalescence of a binary, before the plunge and merger, by including leading order corrections due to spin, tides, dissipation and gravitational wave radiation. Our implementa... |
0805.1201 | Cl\'audio Nassif Cruz | Claudio Nassif | Deformed Special Relativity with an energy barrier of a minimum speed | 14 pages, 4 figures | International Journal of Modern Physics D 19, 5, p.539-564 (2010) | 10.1142/S021827181001652X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This research aims to introduce a new principle in the flat space-time
geometry through the elimination of the classical idea of rest and by including
a universal minimum limit of speed in the quantum world. This limit,
unattainable by the particles, represents a preferred inertial reference frame
associated with a u... | [
{
"created": "Thu, 8 May 2008 17:15:13 GMT",
"version": "v1"
},
{
"created": "Fri, 9 May 2008 16:46:11 GMT",
"version": "v2"
},
{
"created": "Sun, 11 May 2008 22:17:31 GMT",
"version": "v3"
},
{
"created": "Sun, 25 May 2008 14:09:05 GMT",
"version": "v4"
},
{
"cre... | 2017-11-23 | [
[
"Nassif",
"Claudio",
""
]
] | This research aims to introduce a new principle in the flat space-time geometry through the elimination of the classical idea of rest and by including a universal minimum limit of speed in the quantum world. This limit, unattainable by the particles, represents a preferred inertial reference frame associated with a uni... |
2106.01622 | Lijing Shao | Minghao Guo, Junjie Zhao, Lijing Shao | Extended reduced-order surrogate models for scalar-tensor gravity in the
strong field and applications to binary pulsars and gravitational waves | 15 pages, 11 figures, 2 tables; accepted by PRD | Phys. Rev. D 104, 104065 (2021) | 10.1103/PhysRevD.104.104065 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Statistically sound tests of scalar-tensor gravity theories in the
strong-field regime usually involves computationally intensive calculations. In
this study, we construct a reduced order surrogate model for the scalar-tensor
gravity of Damour and Esposito-Far\`ese (DEF) with spontaneous scalarization
phenomena devel... | [
{
"created": "Thu, 3 Jun 2021 06:46:17 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Oct 2021 02:13:38 GMT",
"version": "v2"
}
] | 2021-12-01 | [
[
"Guo",
"Minghao",
""
],
[
"Zhao",
"Junjie",
""
],
[
"Shao",
"Lijing",
""
]
] | Statistically sound tests of scalar-tensor gravity theories in the strong-field regime usually involves computationally intensive calculations. In this study, we construct a reduced order surrogate model for the scalar-tensor gravity of Damour and Esposito-Far\`ese (DEF) with spontaneous scalarization phenomena develop... |
gr-qc/9606053 | null | Kosaburo Hashiguchi | Invalidity of the relativity principle and a proposal of the twofold
metric principle | 53 pages | null | null | null | gr-qc | null | I show that all inertial systems are not equivalent, and the Lorentz
transformation is not the space-time transformation over two inertial systems
moving with relative constant velocity. To do this, I consider imaginary
signals travelling over any inertial system K with arbitrarily large
velocities. The travelling of... | [
{
"created": "Wed, 19 Jun 1996 05:57:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Hashiguchi",
"Kosaburo",
""
]
] | I show that all inertial systems are not equivalent, and the Lorentz transformation is not the space-time transformation over two inertial systems moving with relative constant velocity. To do this, I consider imaginary signals travelling over any inertial system K with arbitrarily large velocities. The travelling of a... |
2012.06484 | Joel Berg\'e | Joel Berg\'e, Quentin Baghi, Emilie Hardy, Gilles M\'etris, Alain
Robert, Manuel Rodrigues, Pierre Touboul, Ratana Chhun, Pierre-Yves Guidotti,
Sandrine Pires, Serge Reynaud, Laura Serron, Jean-Michel Travert | MICROSCOPE mission: Data analysis principle | References updated | Class. Quantum Grav. 39 (2022) 204007 | 10.1088/1361-6382/ac0235 | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | After performing highly sensitive acceleration measurements during two years
of drag-free flight around the Earth, MICROSCOPE provided the best constraint
on the Weak Equivalence Principle (WEP) to date. Beside being a technological
challenge, this experiment required a specialised data analysis pipeline to
look for ... | [
{
"created": "Fri, 11 Dec 2020 16:48:37 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Dec 2020 12:41:53 GMT",
"version": "v2"
}
] | 2023-04-14 | [
[
"Bergé",
"Joel",
""
],
[
"Baghi",
"Quentin",
""
],
[
"Hardy",
"Emilie",
""
],
[
"Métris",
"Gilles",
""
],
[
"Robert",
"Alain",
""
],
[
"Rodrigues",
"Manuel",
""
],
[
"Touboul",
"Pierre",
""
],
[
"Ch... | After performing highly sensitive acceleration measurements during two years of drag-free flight around the Earth, MICROSCOPE provided the best constraint on the Weak Equivalence Principle (WEP) to date. Beside being a technological challenge, this experiment required a specialised data analysis pipeline to look for a ... |
gr-qc/0402111 | Alejandro Perez | Karim Noui and Alejandro Perez | Three dimensional loop quantum gravity: coupling to point particles | Typos corrected and references added | Class.Quant.Grav. 22 (2005) 4489-4514 | 10.1088/0264-9381/22/21/005 | null | gr-qc hep-th | null | We consider the coupling between three dimensional gravity with zero
cosmological constant and massive spinning point particles. First, we study the
classical canonical analysis of the coupled system. Then, we go to the
Hamiltonian quantization generalizing loop quantum gravity techniques. We give
a complete descript... | [
{
"created": "Wed, 25 Feb 2004 03:36:01 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Mar 2004 20:54:33 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Noui",
"Karim",
""
],
[
"Perez",
"Alejandro",
""
]
] | We consider the coupling between three dimensional gravity with zero cosmological constant and massive spinning point particles. First, we study the classical canonical analysis of the coupled system. Then, we go to the Hamiltonian quantization generalizing loop quantum gravity techniques. We give a complete descriptio... |
gr-qc/0506111 | Manasse R. Mbonye | Manasse R. Mbonye and Demosthenes Kazanas | A non-singular black hole model as a possible end-product of
gravitational collapse | 12 Pages, 1 figure. Accepted for publication in Phys. Rev. D | Phys.Rev. D72 (2005) 024016 | 10.1103/PhysRevD.72.024016 | null | gr-qc astro-ph hep-th | null | In this paper we present a non-singular black hole model as a possible
end-product of gravitational collapse. The depicted spacetime which is type
[II,(II)], by Petrov classification, is an exact solution of the Einstein
equations and contains two horizons. The equation of state in the radial
direction, is a well-beh... | [
{
"created": "Wed, 22 Jun 2005 22:45:31 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Jun 2005 20:02:17 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Mbonye",
"Manasse R.",
""
],
[
"Kazanas",
"Demosthenes",
""
]
] | In this paper we present a non-singular black hole model as a possible end-product of gravitational collapse. The depicted spacetime which is type [II,(II)], by Petrov classification, is an exact solution of the Einstein equations and contains two horizons. The equation of state in the radial direction, is a well-behav... |
2301.10773 | Eduardo Velasco-Aja Mr. | Enrique \'Alvarez, Jesus Anero and Eduardo Velasco-Aja | Variations on the Goroff-Sagnotti operator | 12 pages | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/4.0/ | The effect of modifying General Relativity with the addition of some higher
dimensional operators, generalizations of the Goroff-Sagnotti operator, is
discussed. We determine in particular, the general solution of the classical
equations of motion, assuming it to be spherically symmetric, not necessarily
static. Even... | [
{
"created": "Wed, 25 Jan 2023 15:21:29 GMT",
"version": "v1"
}
] | 2023-01-27 | [
[
"Álvarez",
"Enrique",
""
],
[
"Anero",
"Jesus",
""
],
[
"Velasco-Aja",
"Eduardo",
""
]
] | The effect of modifying General Relativity with the addition of some higher dimensional operators, generalizations of the Goroff-Sagnotti operator, is discussed. We determine in particular, the general solution of the classical equations of motion, assuming it to be spherically symmetric, not necessarily static. Even i... |
2302.09870 | Anna Liu | Anna Liu, Isaac C. F. Wong, Samson H. W. Leong, Anupreeta More, Otto
A. Hannuksela, Tjonnie G. F. Li | Exploring the hidden Universe: A novel phenomenological approach for
recovering arbitrary gravitational-wave millilensing configurations | 12 pages, 8 figures | null | 10.1093/mnras/stad1302 | null | gr-qc astro-ph.HE hep-ph | http://creativecommons.org/licenses/by/4.0/ | Since the first detection of gravitational waves in 2015, gravitational-wave
astronomy has emerged as a rapidly advancing field that holds great potential
for studying the cosmos, from probing the properties of black holes to testing
the limits of our current understanding of gravity. One important aspect of
gravitat... | [
{
"created": "Mon, 20 Feb 2023 10:01:57 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Feb 2023 02:22:57 GMT",
"version": "v2"
}
] | 2023-05-17 | [
[
"Liu",
"Anna",
""
],
[
"Wong",
"Isaac C. F.",
""
],
[
"Leong",
"Samson H. W.",
""
],
[
"More",
"Anupreeta",
""
],
[
"Hannuksela",
"Otto A.",
""
],
[
"Li",
"Tjonnie G. F.",
""
]
] | Since the first detection of gravitational waves in 2015, gravitational-wave astronomy has emerged as a rapidly advancing field that holds great potential for studying the cosmos, from probing the properties of black holes to testing the limits of our current understanding of gravity. One important aspect of gravitatio... |
2104.11134 | Hyat Huang | Jinbo Yang and Hyat Huang | Trapping Horizons of the Evolving Charged Wormhole and Black Bounce | Matched the published version. Added Penrose diagrams | Phys. Rev. D 104, 084005 (2021) | 10.1103/PhysRevD.104.084005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain one family of dynamic solutions in the Einstein-Maxwell-scalar(EMS)
theory. Our solutions could describe the evolving charged black(white) hole or
wormhole and its transition, including the case of black bounce/wormhole
transition. We compare different wormhole throat definitions and suggest that
the usage ... | [
{
"created": "Thu, 22 Apr 2021 15:37:44 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Oct 2021 08:21:47 GMT",
"version": "v2"
}
] | 2021-10-14 | [
[
"Yang",
"Jinbo",
""
],
[
"Huang",
"Hyat",
""
]
] | We obtain one family of dynamic solutions in the Einstein-Maxwell-scalar(EMS) theory. Our solutions could describe the evolving charged black(white) hole or wormhole and its transition, including the case of black bounce/wormhole transition. We compare different wormhole throat definitions and suggest that the usage of... |
1204.3138 | Matt Visser | Matt Visser (Victoria University of Wellington) | Quantization of area for event and Cauchy horizons of the Kerr-Newman
black hole | v1: 15 pages; v2: 2 references added, no physics changes; v3: 16 now
pages, discussion of physical implications clarified, no calculational
changes, this version accepted for publication in JHEP | JHEP 1206 (2012) 023 | 10.1007/JHEP06(2012)023 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on various string theoretic constructions, and various string-inspired
generalizations thereof, there have been repeated suggestions that the areas of
black hole event horizons might be quantized in a quite specific manner, in
terms of linear combinations of square roots of positive integers. It is
important to... | [
{
"created": "Sat, 14 Apr 2012 03:43:45 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Apr 2012 02:19:05 GMT",
"version": "v2"
},
{
"created": "Tue, 22 May 2012 21:58:51 GMT",
"version": "v3"
}
] | 2012-06-07 | [
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | Based on various string theoretic constructions, and various string-inspired generalizations thereof, there have been repeated suggestions that the areas of black hole event horizons might be quantized in a quite specific manner, in terms of linear combinations of square roots of positive integers. It is important to r... |
1207.3770 | Laszlo Arpad Gergely | L. \'A. Gergely, T. Harko | Testing General Relativity With Laser Accelerated Electron Beams | Proceedings of LEI 2011 - Light at Extreme Intensities Conference,
Szeged, Hungary, 2011 | AIP Conf.Proc.1462:9-12,2012 | 10.1063/1.4736750 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Electron accelerations of the order of $10^{21} g$ obtained by laser fields
open up the possibility of experimentally testing one of the cornerstones of
general relativity, the weak equivalence principle, which states that the local
effects of a gravitational field are indistinguishable from those sensed by a
properl... | [
{
"created": "Mon, 16 Jul 2012 19:13:11 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Gergely",
"L. Á.",
""
],
[
"Harko",
"T.",
""
]
] | Electron accelerations of the order of $10^{21} g$ obtained by laser fields open up the possibility of experimentally testing one of the cornerstones of general relativity, the weak equivalence principle, which states that the local effects of a gravitational field are indistinguishable from those sensed by a properly ... |
1311.7539 | Edward Porter | Edward K. Porter and J\'er\^ome Carr\'e | A Hamiltonian Monte Carlo method for Bayesian Inference of Supermassive
Black Hole Binaries | 16 pages, 8 figures | null | 10.1088/0264-9381/31/14/145004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the use of a Hamiltonian Monte Carlo to map out the posterior
density function for supermassive black hole binaries. While previous Markov
Chain Monte Carlo (MCMC) methods, such as Metropolis-Hastings MCMC, have been
successfully employed for a number of different gravitational wave sources,
these meth... | [
{
"created": "Fri, 29 Nov 2013 12:20:40 GMT",
"version": "v1"
}
] | 2019-08-19 | [
[
"Porter",
"Edward K.",
""
],
[
"Carré",
"Jérôme",
""
]
] | We investigate the use of a Hamiltonian Monte Carlo to map out the posterior density function for supermassive black hole binaries. While previous Markov Chain Monte Carlo (MCMC) methods, such as Metropolis-Hastings MCMC, have been successfully employed for a number of different gravitational wave sources, these method... |
gr-qc/9411009 | Jemal Guven | Jemal Guven and Niall \'O Murchadha | The Constraints in Spherically Symmetric General Relativity I ---
Optical Scalars, Foliations, Bounds on the Configuration Space Variables and
the Positivity of the Quasi-Local Mass | 45 pages, Plain Tex, 1 figure available from the authors. | Phys.Rev. D52 (1995) 758-775 | 10.1103/PhysRevD.52.758 | ICN-UNAM 94-15 Revised Version | gr-qc | null | We examine the constraints of spherically symmetric general relativity with
one asymptotically flat region, exploiting both the traditional metric
variables and variables constructed from the optical scalars. With respect to
the latter variables, there exist two linear combinations of the Hamiltonian
and momentum con... | [
{
"created": "Thu, 3 Nov 1994 17:30:37 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Apr 1995 00:02:05 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Guven",
"Jemal",
""
],
[
"Murchadha",
"Niall Ó",
""
]
] | We examine the constraints of spherically symmetric general relativity with one asymptotically flat region, exploiting both the traditional metric variables and variables constructed from the optical scalars. With respect to the latter variables, there exist two linear combinations of the Hamiltonian and momentum const... |
1410.5213 | Francisco Lobo | Tiberiu Harko, Francisco S. N. Lobo, M. K. Mak | Bianchi type I cosmological models in Eddington-inspired Born-Infeld
gravity | 23 pages, 12 figures; to appear in a Special Issue of Galaxies:
"Beyond Standard Gravity and Cosmology". V2: references added, 24 pages;
matches published version | Galaxies 2 (2014) 4, 496-519 | 10.3390/galaxies2040496 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the dynamics of a barotropic cosmological fluid in an
anisotropic, Bianchi type I space-time in Eddington-inspired Born-Infeld (EiBI)
gravity. By assuming an isotropic pressure distribution, we obtain the general
solution of the field equations in an exact parametric form. The behavior of
the geometric an... | [
{
"created": "Mon, 20 Oct 2014 10:00:07 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Oct 2014 21:59:41 GMT",
"version": "v2"
}
] | 2014-10-30 | [
[
"Harko",
"Tiberiu",
""
],
[
"Lobo",
"Francisco S. N.",
""
],
[
"Mak",
"M. K.",
""
]
] | We consider the dynamics of a barotropic cosmological fluid in an anisotropic, Bianchi type I space-time in Eddington-inspired Born-Infeld (EiBI) gravity. By assuming an isotropic pressure distribution, we obtain the general solution of the field equations in an exact parametric form. The behavior of the geometric and ... |
2209.04297 | Andreas G. A. Pithis | Luca Marchetti, Daniele Oriti, Andreas G. A. Pithis, Johannes
Th\"urigen | Phase transitions in TGFT: a Landau-Ginzburg analysis of Lorentzian
quantum geometric models | 41 + 20 pages, 2 figures; matches published version | J. High Energ. Phys. 2023, 74 (2023) | 10.1007/JHEP02(2023)074 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the tensorial group field theory (TGFT) approach to quantum gravity, the
basic quanta of the theory correspond to discrete building blocks of geometry.
It is expected that their collective dynamics gives rise to continuum spacetime
at a coarse grained level, via a process involving a phase transition. In this
work... | [
{
"created": "Fri, 9 Sep 2022 13:44:49 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Feb 2023 22:10:03 GMT",
"version": "v2"
}
] | 2023-02-14 | [
[
"Marchetti",
"Luca",
""
],
[
"Oriti",
"Daniele",
""
],
[
"Pithis",
"Andreas G. A.",
""
],
[
"Thürigen",
"Johannes",
""
]
] | In the tensorial group field theory (TGFT) approach to quantum gravity, the basic quanta of the theory correspond to discrete building blocks of geometry. It is expected that their collective dynamics gives rise to continuum spacetime at a coarse grained level, via a process involving a phase transition. In this work w... |
gr-qc/0508027 | Peter Breitenlohner | Peter Breitenlohner (1), Dieter Maison (1), D. H. Tchrakian (2) ((1)
Max-Planck-Institut fuer Physik, Munich, Germany, (2) Department of
Mathematical Physics, National University of Ireland Maynooth, and School of
Theoretical Physics -- DIAS, Dublin, Ireland) | Regular solutions to higher order curvature Einstein--Yang-Mills systems
in higher dimensions | 34 pages, 12 figures | Class.Quant.Grav. 22 (2005) 5201-5222 | 10.1088/0264-9381/22/24/001 | MPP-2005-83 | gr-qc hep-th | null | We study regular, static, spherically symmetric solutions of Yang-Mills
theories employing higher order invariants of the field strength coupled to
gravity in $d$ dimensions. We consider models with only two such invariants
characterised by integers $p$ and $q$. These models depend on one dimensionless
parameter $\al... | [
{
"created": "Mon, 8 Aug 2005 12:00:07 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Breitenlohner",
"Peter",
""
],
[
"Maison",
"Dieter",
""
],
[
"Tchrakian",
"D. H.",
""
]
] | We study regular, static, spherically symmetric solutions of Yang-Mills theories employing higher order invariants of the field strength coupled to gravity in $d$ dimensions. We consider models with only two such invariants characterised by integers $p$ and $q$. These models depend on one dimensionless parameter $\alph... |
1406.4284 | Debraj Roy | Debraj Roy | Lagrangian analysis of `trivial' symmetries in models of gravity | 4 pages, LaTeX; Based on presentation at the conference "Relativity
and Gravitation: 100 Years after Einstein in Prague," held in Prague, June
2012 | Springer Proceedings in Physics, Relativity and Gravitation,
Volume 157, 2014, pp 309-313 | 10.1007/978-3-319-06761-2_43 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the differences between Poincare and canonical hamiltonian
symmetries in models of gravity through the corresponding Noether identities
and show that they are equivalent modulo trivial gauge symmetries.
| [
{
"created": "Tue, 17 Jun 2014 09:18:00 GMT",
"version": "v1"
}
] | 2014-06-18 | [
[
"Roy",
"Debraj",
""
]
] | We study the differences between Poincare and canonical hamiltonian symmetries in models of gravity through the corresponding Noether identities and show that they are equivalent modulo trivial gauge symmetries. |
gr-qc/9901087 | Alexander N. Linden | Alexander N. Linden | Near Field Behavior of Static Spherically Symmetric Solutions of
Einstein SU(2) Yang Mills Equations with Cosmological Constant | 27pages | null | null | null | gr-qc | null | We consider static spherically symmetric solutions of the Einstein equations
with cosmological constant coupled to the SU(2) Yang Mills equations. We prove
that most solutions can be continued back to the origin of spherical symmetry
and that the qualitative behavior of solutions near this origin does not depend
on t... | [
{
"created": "Fri, 29 Jan 1999 22:25:34 GMT",
"version": "v1"
},
{
"created": "Mon, 1 May 2000 21:25:08 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Linden",
"Alexander N.",
""
]
] | We consider static spherically symmetric solutions of the Einstein equations with cosmological constant coupled to the SU(2) Yang Mills equations. We prove that most solutions can be continued back to the origin of spherical symmetry and that the qualitative behavior of solutions near this origin does not depend on the... |
gr-qc/0610085 | Alcides Garat | Alcides Garat | The Lorentz force equation as Fermi-Walker transport in geometrodynamics | There is a new abstract and the introduction has been modified. There
are two new sections: Frenet-Serret second version, and Fermi-Walker
projections. The conclusions have been substantially modified | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new tetrad introduced within the framework of geometrodynamics for non-null
electromagnetic fields allows for the geometrical analysis of the Lorentz force
equation and its solutions in curved spacetimes. When expressed in terms of
this new tetrad, the electromagnetic field displays explicitly maximum
simplificatio... | [
{
"created": "Tue, 17 Oct 2006 15:36:48 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Dec 2006 18:37:08 GMT",
"version": "v2"
},
{
"created": "Fri, 29 Jun 2012 13:37:40 GMT",
"version": "v3"
}
] | 2012-07-25 | [
[
"Garat",
"Alcides",
""
]
] | A new tetrad introduced within the framework of geometrodynamics for non-null electromagnetic fields allows for the geometrical analysis of the Lorentz force equation and its solutions in curved spacetimes. When expressed in terms of this new tetrad, the electromagnetic field displays explicitly maximum simplification,... |
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