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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1311.0437 | Ujjal Debnath | Ujjal Debnath | Reconstructing Einstein-Aether Gravity from Ordinary and
Entropy-Corrected Holographic and New Agegraphic Dark Energy Models | 19 pages, 8 figures. arXiv admin note: text overlap with
arXiv:1004.1805 by other authors | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here we briefly discuss the Einstein-Aether gravity theory by modification of
Einstein-Hilbert action. We find the modified Friedmann equations and then from
the equations we find the effective density and pressure for Einstein-Aether
gravity sector. These can be treated as dark energy provided some restrictions
on t... | [
{
"created": "Sun, 3 Nov 2013 07:50:26 GMT",
"version": "v1"
}
] | 2013-11-05 | [
[
"Debnath",
"Ujjal",
""
]
] | Here we briefly discuss the Einstein-Aether gravity theory by modification of Einstein-Hilbert action. We find the modified Friedmann equations and then from the equations we find the effective density and pressure for Einstein-Aether gravity sector. These can be treated as dark energy provided some restrictions on the... |
2206.00430 | Bivudutta Mishra Dr. | S.A. Kadam, B. Mishra, S.K. Tripathy | Dynamical features of $f(T,B)$ cosmology | 11 pages, 11 figures, MPLA (Accepted Version) | Mod. Phys. Lett. A, 37(17), 2250104 (2022) | 10.1142/S0217732322501048 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have explored the field equations of $f(T,B)$ gravity and
determined the dynamical parameters with the hyperbolic function of Hubble
parameter. The accelerating behavior has been observed and the behavior of
equation of state parameter indicates $\Lambda CDM$ model at late time. The
role of model pa... | [
{
"created": "Fri, 27 May 2022 04:40:18 GMT",
"version": "v1"
}
] | 2022-07-22 | [
[
"Kadam",
"S. A.",
""
],
[
"Mishra",
"B.",
""
],
[
"Tripathy",
"S. K.",
""
]
] | In this paper, we have explored the field equations of $f(T,B)$ gravity and determined the dynamical parameters with the hyperbolic function of Hubble parameter. The accelerating behavior has been observed and the behavior of equation of state parameter indicates $\Lambda CDM$ model at late time. The role of model para... |
1211.3463 | Pedro Ca\~nate Casseres | Pedro Ca\~nate, Philip Pearle, Daniel Sudarsky | CSL Wave Function Collapse Model as a Mechanism for the Emergence of
Cosmological Asymmetries in Inflation | 28 pages, no figures, In press in PRD | null | 10.1103/PhysRevD.87.104024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As previously discussed in (D. Sudarsky, Int.J.Mod.Phys.D20:509-552, (2011);
[arXiv:0906.0315]), the inflationary account for the emergence of the seeds of
cosmic structure falls short of actually explaining the generation of
primordial anisotropies and inhomogeneities. This description starts from a
symmetric backgr... | [
{
"created": "Wed, 14 Nov 2012 23:43:05 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Feb 2013 18:53:34 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Apr 2013 20:21:30 GMT",
"version": "v3"
}
] | 2015-06-12 | [
[
"Cañate",
"Pedro",
""
],
[
"Pearle",
"Philip",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | As previously discussed in (D. Sudarsky, Int.J.Mod.Phys.D20:509-552, (2011); [arXiv:0906.0315]), the inflationary account for the emergence of the seeds of cosmic structure falls short of actually explaining the generation of primordial anisotropies and inhomogeneities. This description starts from a symmetric backgrou... |
gr-qc/9806120 | Merced Montesinos | Merced Montesinos and Carlo Rovelli | The fermionic contribution to the spectrum of the area operator in
nonperturbative quantum gravity | 10 pages, revtex file. Revised version | Class.Quant.Grav. 15 (1998) 3795-3801 | 10.1088/0264-9381/15/12/009 | null | gr-qc hep-th | null | The role of fermionic matter in the spectrum of the area operator is analyzed
using the Baez--Krasnov framework for quantum fermions and gravity. The result
is that the fermionic contribution to the area of a surface $S$ is equivalent
to the contribution of purely gravitational spin network's edges tangent to
$S$. Th... | [
{
"created": "Tue, 30 Jun 1998 15:42:15 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Dec 1998 18:31:26 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Montesinos",
"Merced",
""
],
[
"Rovelli",
"Carlo",
""
]
] | The role of fermionic matter in the spectrum of the area operator is analyzed using the Baez--Krasnov framework for quantum fermions and gravity. The result is that the fermionic contribution to the area of a surface $S$ is equivalent to the contribution of purely gravitational spin network's edges tangent to $S$. Ther... |
2402.09686 | Jieci Wang | Wentao Liu, Xiongjun Fang, Jiliang Jing, Jieci Wang | Lorentz violation induces isospectrality breaking in Einstein-Bumblebee
gravity theory | 9 pages, 16 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the quasinormal modes (QNMs) of a
Lorentz-violating spacetime, factoring in a cosmological constant, within the
framework of Einstein-Bumblebee gravity. Our findings reveal that the
interaction of spacetime with an anisotropic bumblebee field imparts distinct
contributions to the axial a... | [
{
"created": "Thu, 15 Feb 2024 03:43:20 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Mar 2024 00:43:37 GMT",
"version": "v2"
}
] | 2024-03-08 | [
[
"Liu",
"Wentao",
""
],
[
"Fang",
"Xiongjun",
""
],
[
"Jing",
"Jiliang",
""
],
[
"Wang",
"Jieci",
""
]
] | In this paper, we investigate the quasinormal modes (QNMs) of a Lorentz-violating spacetime, factoring in a cosmological constant, within the framework of Einstein-Bumblebee gravity. Our findings reveal that the interaction of spacetime with an anisotropic bumblebee field imparts distinct contributions to the axial and... |
2107.13919 | Tao Yang | Rong-Gen Cai and Tao Yang | Space-borne atom interferometric gravitational wave detections. Part I.
The forecast of bright sirens on cosmology | 14 pages, 3 figures, 1 table. v2 to match the accepted JCAP version.
v3 to match the published version | JCAP12(2021)017 | 10.1088/1475-7516/2021/12/017 | null | gr-qc astro-ph.CO hep-ex hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Atom interferometers (AIs) as gravitational-wave (GW) detectors have been
proposed a decade ago. Both ground and space-based projects will be in
construction and preparation in the near future. In this paper, for the first
time, we investigate the potential of the space-borne AIs on detecting GW
standard sirens and h... | [
{
"created": "Thu, 29 Jul 2021 11:52:38 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Nov 2021 09:36:02 GMT",
"version": "v2"
},
{
"created": "Thu, 9 Dec 2021 15:05:47 GMT",
"version": "v3"
}
] | 2021-12-10 | [
[
"Cai",
"Rong-Gen",
""
],
[
"Yang",
"Tao",
""
]
] | Atom interferometers (AIs) as gravitational-wave (GW) detectors have been proposed a decade ago. Both ground and space-based projects will be in construction and preparation in the near future. In this paper, for the first time, we investigate the potential of the space-borne AIs on detecting GW standard sirens and hen... |
gr-qc/9609036 | Hideo Kodama | Takashi Hamazaki(Phys. Dept., Kyoto University) and Hideo Kodama
(Yukawa Institute, Kyoto University) | Evolution of Cosmological Perturbations during Reheating | 24 pages, 1 postscript figure, plain LaTeX with epsf.sty | Prog.Theor.Phys. 96 (1996) 1123-1146 | 10.1143/PTP.96.1123 | YITP-96-29, KUNS 1381 | gr-qc | null | The behavior of scalar perturbations on superhorizon scales during the
reheating stage is investigated by replacing the rapidly oscillating inflaton
field by a perfect fluid obtained by spacetime averaging and the WKB
approximation. The influence of the energy transfer from the inflaton to
radiation on the evolution ... | [
{
"created": "Fri, 13 Sep 1996 10:33:19 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Hamazaki",
"Takashi",
"",
"Phys. Dept., Kyoto University"
],
[
"Kodama",
"Hideo",
"",
"Yukawa Institute, Kyoto University"
]
] | The behavior of scalar perturbations on superhorizon scales during the reheating stage is investigated by replacing the rapidly oscillating inflaton field by a perfect fluid obtained by spacetime averaging and the WKB approximation. The influence of the energy transfer from the inflaton to radiation on the evolution of... |
1907.12538 | Maria Skugoreva | Maria A. Skugoreva, Alexey V. Toporensky | Anisotropic cosmological dynamics in $f(T)$ gravity in the presence of a
perfect fluid | 18 pages, 6 figures, some corrections, published version | Eur. Phys. J. C 79 (2019) no. 10, 813 | 10.1140/epjc/s10052-019-7251-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the cosmological evolution of a flat anisotropic Universe in
$f(T)$ gravity in the presence of a perfect fluid. It is shown that the matter
content of the Universe has a significant impact of the nature of a
cosmological singularity in the model studied. Depending on the parameters of
the $f(T)$ function ... | [
{
"created": "Mon, 29 Jul 2019 17:22:16 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Jun 2021 20:03:22 GMT",
"version": "v2"
}
] | 2021-06-10 | [
[
"Skugoreva",
"Maria A.",
""
],
[
"Toporensky",
"Alexey V.",
""
]
] | We consider the cosmological evolution of a flat anisotropic Universe in $f(T)$ gravity in the presence of a perfect fluid. It is shown that the matter content of the Universe has a significant impact of the nature of a cosmological singularity in the model studied. Depending on the parameters of the $f(T)$ function an... |
gr-qc/9612019 | Robin W. Tucker | R. W. Tucker and C. Wang (Lancaster University) | Dark Matter Gravitational Interactions | 40 pages, 4 Postscript figures | Class.Quant.Grav.15:933-954,1998 | 10.1088/0264-9381/15/4/015 | null | gr-qc | null | We argue that the conjectured dark mater in the Universe may be endowed with
a new kind of gravitational charge that couples to a short range gravitational
interaction mediated by a massive vector field. A model is constructed that
assimilates this concept into ideas of current inflationary cosmology. The
model is al... | [
{
"created": "Mon, 9 Dec 1996 14:32:10 GMT",
"version": "v1"
}
] | 2010-11-30 | [
[
"Tucker",
"R. W.",
"",
"Lancaster University"
],
[
"Wang",
"C.",
"",
"Lancaster University"
]
] | We argue that the conjectured dark mater in the Universe may be endowed with a new kind of gravitational charge that couples to a short range gravitational interaction mediated by a massive vector field. A model is constructed that assimilates this concept into ideas of current inflationary cosmology. The model is also... |
0706.0678 | Yoshiharu Tanaka | Yoshiharu Tanaka, Misao Sasaki | Gradient expansion approach to nonlinear superhorizon perturbations II
-- a single scalar field -- | 13 pages, no figures, typos corrected | Prog.Theor.Phys.118:455-473,2007 | 10.1143/PTP.118.455 | YITP-07-31 | gr-qc astro-ph hep-th | null | We formulate nonlinear perturbations of a scalar field dominated universe on
super-horizon scales. We consider the case of a single scalar field. We take
the gradient expansion approach. We adopt the uniform Hubble slicing and derive
the general solution valid to $O(\epsilon^2)$, where $\epsilon$ is the
expansion par... | [
{
"created": "Tue, 5 Jun 2007 14:57:31 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jun 2007 06:36:32 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Tanaka",
"Yoshiharu",
""
],
[
"Sasaki",
"Misao",
""
]
] | We formulate nonlinear perturbations of a scalar field dominated universe on super-horizon scales. We consider the case of a single scalar field. We take the gradient expansion approach. We adopt the uniform Hubble slicing and derive the general solution valid to $O(\epsilon^2)$, where $\epsilon$ is the expansion param... |
1602.04212 | Christian Corda Prof. | Christian Corda | The M\"ossbauer rotor experiment and the general theory of relativity | 13 pages, 1 figure. Accepted for publication in Annals of Physics.
The results in arXiv:1502.04911 have been reviewed and clarified | Ann. Phys. 368, 258 (2016) | 10.1016/j.aop.2016.02.011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is a rebuttal to Eur. Phys. Jour. Plus 130, 191 (2015), which
claims that the results in arXiv:1502.04911 (Ann. Phys. 355, 360 (2015)) are
incorrect. For this reason, some of the results in arXiv:1502.04911 have been
reviewed and clarified. The results in this paper are dedicated to the 100th
anniversary o... | [
{
"created": "Fri, 12 Feb 2016 11:41:11 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Feb 2016 10:54:18 GMT",
"version": "v2"
}
] | 2016-03-08 | [
[
"Corda",
"Christian",
""
]
] | This paper is a rebuttal to Eur. Phys. Jour. Plus 130, 191 (2015), which claims that the results in arXiv:1502.04911 (Ann. Phys. 355, 360 (2015)) are incorrect. For this reason, some of the results in arXiv:1502.04911 have been reviewed and clarified. The results in this paper are dedicated to the 100th anniversary of ... |
1710.03721 | Filipe Mena | Filipe C. Mena, Jo\~ao M. Oliveira | Radiative gravitational collapse to spherical, toroidal and higher genus
black holes | 20 pages, 3 figures, to appear in Annals of Physics | null | 10.1016/j.aop.2017.10.012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the matching conditions between FLRW and generalised Vaidya
spacetimes with spherical, planar or hyperbolic symmetry, across timelike
hypersurfaces. We then construct new models of gravitational collapse of FLRW
spacetimes with a negative cosmological constant having electromagnetic
radiation in the exterio... | [
{
"created": "Tue, 10 Oct 2017 16:47:16 GMT",
"version": "v1"
}
] | 2017-11-22 | [
[
"Mena",
"Filipe C.",
""
],
[
"Oliveira",
"João M.",
""
]
] | We derive the matching conditions between FLRW and generalised Vaidya spacetimes with spherical, planar or hyperbolic symmetry, across timelike hypersurfaces. We then construct new models of gravitational collapse of FLRW spacetimes with a negative cosmological constant having electromagnetic radiation in the exterior.... |
1202.5809 | Steven L. Liebling | Steven L. Liebling and Carlos Palenzuela | Dynamical Boson Stars | 106 pages, 35 figures, invited review for Living Reviews in
Relativity; major revision in 2022. Comments welcome | Living Rev. Relativity 26, (2023), 1 | 10.1007/s41114-023-00043-4 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The idea of stable, localized bundles of energy has strong appeal as a model
for particles. In the 1950s John Wheeler envisioned such bundles as smooth
configurations of electromagnetic energy that he called {\em geons}, but none
were found. Instead, particle-like solutions were found in the late 1960s with
the addit... | [
{
"created": "Mon, 27 Feb 2012 00:47:39 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Mar 2012 22:13:17 GMT",
"version": "v2"
},
{
"created": "Tue, 23 May 2017 18:13:47 GMT",
"version": "v3"
},
{
"created": "Wed, 28 Sep 2022 13:06:32 GMT",
"version": "v4"
},
{
"c... | 2023-06-02 | [
[
"Liebling",
"Steven L.",
""
],
[
"Palenzuela",
"Carlos",
""
]
] | The idea of stable, localized bundles of energy has strong appeal as a model for particles. In the 1950s John Wheeler envisioned such bundles as smooth configurations of electromagnetic energy that he called {\em geons}, but none were found. Instead, particle-like solutions were found in the late 1960s with the additio... |
1209.2971 | Leslie Wade IV | Leslie Wade, Xavier Siemens, David L. Kaplan, Benjamin Knispel, and
Bruce Allen | Continuous Gravitational Waves from Isolated Galactic Neutron Stars in
the Advanced Detector Era | Accepted for publication by Physical Review D, 8 pages, 5 figures | Phys. Rev. D 86, 124011 (2012) | 10.1103/PhysRevD.86.124011 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a simulated population of isolated Galactic neutron stars. The
rotational frequency of each neutron star evolves through a combination of
electromagnetic and gravitational wave emission. The magnetic field strength
dictates the dipolar emission, and the ellipticity (a measure of a neutron
star's deformati... | [
{
"created": "Thu, 13 Sep 2012 17:34:58 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Nov 2012 16:39:03 GMT",
"version": "v2"
},
{
"created": "Fri, 16 Nov 2012 19:46:00 GMT",
"version": "v3"
}
] | 2013-10-25 | [
[
"Wade",
"Leslie",
""
],
[
"Siemens",
"Xavier",
""
],
[
"Kaplan",
"David L.",
""
],
[
"Knispel",
"Benjamin",
""
],
[
"Allen",
"Bruce",
""
]
] | We consider a simulated population of isolated Galactic neutron stars. The rotational frequency of each neutron star evolves through a combination of electromagnetic and gravitational wave emission. The magnetic field strength dictates the dipolar emission, and the ellipticity (a measure of a neutron star's deformation... |
1308.4343 | Barun Majumder | Adel Awad, Ahmed Farag Ali and Barun Majumder | Nonsingular Rainbow Universes | Highlighted in Nature Middle East
(http://www.nature.com/nmiddleeast/2013/130815/full/nmiddleeast.2013.211.html) | JCAP 10 (2013) 052 | 10.1088/1475-7516/2013/10/052 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we study FRW cosmologies in the context of gravity rainbow. We
discuss the general conditions for having a nonsingular FRW cosmology in
gravity rainbow. We propose that gravity rainbow functions can be fixed using
two known modified dispersion relation (MDR), which have been proposed in
literature. The ... | [
{
"created": "Tue, 20 Aug 2013 16:21:46 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Sep 2013 11:33:26 GMT",
"version": "v2"
},
{
"created": "Thu, 14 Nov 2013 02:51:28 GMT",
"version": "v3"
}
] | 2013-11-15 | [
[
"Awad",
"Adel",
""
],
[
"Ali",
"Ahmed Farag",
""
],
[
"Majumder",
"Barun",
""
]
] | In this work, we study FRW cosmologies in the context of gravity rainbow. We discuss the general conditions for having a nonsingular FRW cosmology in gravity rainbow. We propose that gravity rainbow functions can be fixed using two known modified dispersion relation (MDR), which have been proposed in literature. The fi... |
1511.07991 | Valerio Bozza | V. Bozza, C. Melchiorre | Caustics of $1/r^n$ binary gravitational lenses: from galactic haloes to
exotic matter | 28 pages, 19 figures, focus expanded to galactic haloes | null | 10.1088/1475-7516/2016/03/040 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the caustic topologies for binary gravitational lenses made up
of two objects whose gravitational potential declines as $1/r^n$. With $n<1$
this corresponds to power-law dust distributions like the singular isothermal
sphere. The $n>1$ regime can be obtained with some violations of the energy
condition... | [
{
"created": "Wed, 25 Nov 2015 08:31:51 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Feb 2016 21:01:48 GMT",
"version": "v2"
},
{
"created": "Mon, 7 Mar 2016 10:04:01 GMT",
"version": "v3"
}
] | 2016-04-06 | [
[
"Bozza",
"V.",
""
],
[
"Melchiorre",
"C.",
""
]
] | We investigate the caustic topologies for binary gravitational lenses made up of two objects whose gravitational potential declines as $1/r^n$. With $n<1$ this corresponds to power-law dust distributions like the singular isothermal sphere. The $n>1$ regime can be obtained with some violations of the energy conditions,... |
1110.6150 | Emanuele Alesci | Emanuele Alesci | Regularized Hamiltonians and Spinfoams | 4 pages, based on a talk given at Loops '11 in Madrid, to appear in
Journal of Physics: Conference Series (JPCS) | null | 10.1088/1742-6596/360/1/012041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review a recent proposal for the regularization of the scalar constraint
of General Relativity in the context of LQG. The resulting constraint presents
strengths and weaknesses compared to Thiemann's prescription. The main
improvement is that it can generate the 1-4 Pachner moves and its matrix
elements contain 15... | [
{
"created": "Thu, 27 Oct 2011 18:19:32 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Alesci",
"Emanuele",
""
]
] | We review a recent proposal for the regularization of the scalar constraint of General Relativity in the context of LQG. The resulting constraint presents strengths and weaknesses compared to Thiemann's prescription. The main improvement is that it can generate the 1-4 Pachner moves and its matrix elements contain 15j ... |
2211.08127 | Yang Qu | Yang Qu, Jun Tao, Huan Yang | Thermodynamics and phase transition in central charge criticality of
charged Gauss-Bonnet AdS black holes | null | null | 10.1016/j.nuclphysb.2023.116234 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the thermodynamics of D-dimensional charged
Gauss-Bonnet black holes in anti-de Sitter spacetime. Varying the cosmological
constant, Newton constant and Gauss-Bonnet coupling constant in the bulk, one
can rewrite the first law of thermodynamics for black holes. Furthermore, we
introduce ... | [
{
"created": "Tue, 15 Nov 2022 13:30:30 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Nov 2022 15:02:43 GMT",
"version": "v2"
}
] | 2023-05-31 | [
[
"Qu",
"Yang",
""
],
[
"Tao",
"Jun",
""
],
[
"Yang",
"Huan",
""
]
] | In this paper, we investigate the thermodynamics of D-dimensional charged Gauss-Bonnet black holes in anti-de Sitter spacetime. Varying the cosmological constant, Newton constant and Gauss-Bonnet coupling constant in the bulk, one can rewrite the first law of thermodynamics for black holes. Furthermore, we introduce th... |
2402.13797 | Bakhtinur Juraev | Bakhtinur Juraev, Zden\v{e}k Stuchl\'ik, Arman Tursunov, Martin
Kolo\v{s} | Radiating particle in the vicinity of the weakly charged Schwarzschild
black hole | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | It is well known that supermassive black holes in the centers of galaxies are
capable of accelerating charged particles to very high energies. In many cases,
the particle acceleration by black holes occurs electromagnetically through an
electric field induced by the source. In such scenarios, the accelerated
particle... | [
{
"created": "Wed, 21 Feb 2024 13:27:05 GMT",
"version": "v1"
}
] | 2024-02-22 | [
[
"Juraev",
"Bakhtinur",
""
],
[
"Stuchlík",
"Zdeněk",
""
],
[
"Tursunov",
"Arman",
""
],
[
"Kološ",
"Martin",
""
]
] | It is well known that supermassive black holes in the centers of galaxies are capable of accelerating charged particles to very high energies. In many cases, the particle acceleration by black holes occurs electromagnetically through an electric field induced by the source. In such scenarios, the accelerated particles ... |
0712.2541 | Michael Reisenberger | Michael P. Reisenberger | The Poisson bracket on free null initial data for gravity | 4 pages,1 figure. Some changes to text to improve clarity of
presentation, this is the final published version | Phys.Rev.Lett.101:211101,2008 | 10.1103/PhysRevLett.101.211101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Free initial data for general relativity on a pair of intersecting null
hypersurfaces are well known, but the lack of a Poisson bracket and concerns
about caustics have stymied the development of a constraint free canonical
theory. Here it is pointed out how caustics and generator crossings can be
neatly avoided and ... | [
{
"created": "Sat, 15 Dec 2007 22:18:55 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Dec 2007 17:33:22 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Jun 2008 16:10:17 GMT",
"version": "v3"
},
{
"created": "Fri, 26 Jun 2009 14:50:27 GMT",
"version": "v4"
}
] | 2009-06-26 | [
[
"Reisenberger",
"Michael P.",
""
]
] | Free initial data for general relativity on a pair of intersecting null hypersurfaces are well known, but the lack of a Poisson bracket and concerns about caustics have stymied the development of a constraint free canonical theory. Here it is pointed out how caustics and generator crossings can be neatly avoided and a ... |
2211.05760 | Antonio Enea Romano | Antonio Enea Romano | Effective speed of gravitational waves | Eppur si muove | Phys. Lett. B 851 (2024) 138572 | 10.1016/j.physletb.2024.138572 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We derive an effective equation and action for the propagation of
gravitational waves (GW), encoding the effects of interaction and
self-interaction in a time, frequency and polarization dependent effective
speed. In terms of an appropriately defined effective metric, the effective
action takes the form a massless Kl... | [
{
"created": "Thu, 10 Nov 2022 18:49:12 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Nov 2022 17:43:57 GMT",
"version": "v2"
},
{
"created": "Mon, 21 Nov 2022 04:16:26 GMT",
"version": "v3"
},
{
"created": "Tue, 29 Nov 2022 18:54:42 GMT",
"version": "v4"
},
{
"c... | 2024-03-22 | [
[
"Romano",
"Antonio Enea",
""
]
] | We derive an effective equation and action for the propagation of gravitational waves (GW), encoding the effects of interaction and self-interaction in a time, frequency and polarization dependent effective speed. In terms of an appropriately defined effective metric, the effective action takes the form a massless Klei... |
1301.5402 | Jonn Miritzis | John Miritzis | Energy exchange in Weyl geometry | 9 pages, 2 figures, to appear in J.Phys.Conf.Ser., Proceedings of the
Greek Relativity Meeting NEB15, June 2012, Chania, Greece | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study homogeneous and isotropic cosmologies in a Weyl spacetime. We show
that the field equations can be reduced to the Einstein equations with a
two-fluid source and analyze the qualitative, asymptotic behavior of the
models. Assuming an interaction of the two fluids we impose conditions so that
the solutions of ... | [
{
"created": "Wed, 23 Jan 2013 04:23:00 GMT",
"version": "v1"
}
] | 2013-01-24 | [
[
"Miritzis",
"John",
""
]
] | We study homogeneous and isotropic cosmologies in a Weyl spacetime. We show that the field equations can be reduced to the Einstein equations with a two-fluid source and analyze the qualitative, asymptotic behavior of the models. Assuming an interaction of the two fluids we impose conditions so that the solutions of th... |
1909.07361 | Justin Vines | Nils Siemonsen and Justin Vines | Test black holes, scattering amplitudes and perturbations of Kerr
spacetime | 11 pages + references, 1 figure | Phys. Rev. D 101, 064066 (2020) | 10.1103/PhysRevD.101.064066 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been suggested that amplitudes for quantum higher-spin massive
particles exchanging gravitons lead, via a classical limit, to results for
scattering of spinning black holes in general relativity, when the massive
particles are in a certain way minimally coupled to gravity. Such limits of
such amplitudes sugges... | [
{
"created": "Mon, 16 Sep 2019 17:51:26 GMT",
"version": "v1"
}
] | 2020-04-01 | [
[
"Siemonsen",
"Nils",
""
],
[
"Vines",
"Justin",
""
]
] | It has been suggested that amplitudes for quantum higher-spin massive particles exchanging gravitons lead, via a classical limit, to results for scattering of spinning black holes in general relativity, when the massive particles are in a certain way minimally coupled to gravity. Such limits of such amplitudes suggest,... |
2304.04375 | Takeshi Chiba | Takeshi Chiba and Shunichiro Kinoshita | Note on the Time Dilation of Charged Quantum Clocks | 11 pages, 2 figures, to appear in PRD | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by-sa/4.0/ | We derive the time dilation formula for charged quantum clocks in
electromagnetic fields. As a concrete example of non-inertial motion, we
consider a cyclotron motion in a uniform magnetic field. Applying the time
dilation formula to coherent state of the charged quantum clock, we evaluate
the time dilation quantum-m... | [
{
"created": "Mon, 10 Apr 2023 04:20:16 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Aug 2023 01:45:15 GMT",
"version": "v2"
}
] | 2023-08-02 | [
[
"Chiba",
"Takeshi",
""
],
[
"Kinoshita",
"Shunichiro",
""
]
] | We derive the time dilation formula for charged quantum clocks in electromagnetic fields. As a concrete example of non-inertial motion, we consider a cyclotron motion in a uniform magnetic field. Applying the time dilation formula to coherent state of the charged quantum clock, we evaluate the time dilation quantum-mec... |
1712.02672 | Marcela C\'ardenas | Marcela C\'ardenas, F\'elix-Louis Juli\'e, Nathalie Deruelle | Thermodynamics sheds light on black hole dynamics | null | Phys. Rev. D 97, 124021 (2018) | 10.1103/PhysRevD.97.124021 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose to unify two a priori distinct aspects of black hole physics :
their thermodynamics, and their effective dynamics when they are "skeletonized"
as point particles (a useful procedure when tackling, for example, their motion
in a coalescing binary system). For that purpose, the Einstein- Maxwell-dilaton
(EMD... | [
{
"created": "Thu, 7 Dec 2017 15:38:35 GMT",
"version": "v1"
}
] | 2018-06-20 | [
[
"Cárdenas",
"Marcela",
""
],
[
"Julié",
"Félix-Louis",
""
],
[
"Deruelle",
"Nathalie",
""
]
] | We propose to unify two a priori distinct aspects of black hole physics : their thermodynamics, and their effective dynamics when they are "skeletonized" as point particles (a useful procedure when tackling, for example, their motion in a coalescing binary system). For that purpose, the Einstein- Maxwell-dilaton (EMD) ... |
0905.1822 | Toby Wiseman | Matthew Headrick, Sam Kitchen, Toby Wiseman | A new approach to static numerical relativity, and its application to
Kaluza-Klein black holes | 49 pages, 16 figures; v2: references added | Class.Quant.Grav.27:035002,2010 | 10.1088/0264-9381/27/3/035002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a general framework for solving the Einstein equation for static
and Euclidean metrics. First, we address the issue of gauge-fixing by borrowing
from the Ricci-flow literature the so-called DeTurck trick, which renders the
Einstein equation strictly elliptic and generalizes the usual
harmonic-coordinate ga... | [
{
"created": "Tue, 12 May 2009 12:29:25 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Oct 2009 22:31:38 GMT",
"version": "v2"
}
] | 2010-01-21 | [
[
"Headrick",
"Matthew",
""
],
[
"Kitchen",
"Sam",
""
],
[
"Wiseman",
"Toby",
""
]
] | We propose a general framework for solving the Einstein equation for static and Euclidean metrics. First, we address the issue of gauge-fixing by borrowing from the Ricci-flow literature the so-called DeTurck trick, which renders the Einstein equation strictly elliptic and generalizes the usual harmonic-coordinate gaug... |
2403.16837 | Yi Shuen Christine Lee Miss | Yi Shuen C. Lee, Margaret Millhouse, Andrew Melatos | Impact of noise transients on gravitational-wave burst detection
efficiency of the BayesWave pipeline with multi-detector networks | 16 pages, 8 figures | null | 10.1103/PhysRevD.109.082002 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Detection confidence of the source-agnostic gravitational-wave burst search
pipeline BayesWave is quantified by the log signal-versus-glitch Bayes factor,
$\ln\mathcal{B}_{\mathcal{S},\mathcal{G}}$. A recent study shows that
$\ln\mathcal{B}_{\mathcal{S},\mathcal{G}}$ increases with the number of
detectors. However, t... | [
{
"created": "Mon, 25 Mar 2024 14:59:41 GMT",
"version": "v1"
}
] | 2024-05-09 | [
[
"Lee",
"Yi Shuen C.",
""
],
[
"Millhouse",
"Margaret",
""
],
[
"Melatos",
"Andrew",
""
]
] | Detection confidence of the source-agnostic gravitational-wave burst search pipeline BayesWave is quantified by the log signal-versus-glitch Bayes factor, $\ln\mathcal{B}_{\mathcal{S},\mathcal{G}}$. A recent study shows that $\ln\mathcal{B}_{\mathcal{S},\mathcal{G}}$ increases with the number of detectors. However, the... |
gr-qc/0111046 | Eugen Radu | J.J. van der Bij and Eugen Radu (Faculty of Physics,
Albert-Ludwigs-University, Freiburg, Germany) | On rotating regular nonabelian solutions | 10 pages, no figure | Int.J.Mod.Phys. A17 (2002) 1477-1490 | 10.1142/S0217751X02009886 | Freiburg-THEP 01/15 | gr-qc | null | A general relation for the total angular momentum of a regular solution of
the Einstein-Yang-Mills-Higgs equations is derived. Two different physical
configurations, rotating dyons and rotating magnetic dipoles are discussed as
particular cases. The issue of rotating pure Einstein-Yang-Mills regular
solutions is addr... | [
{
"created": "Thu, 15 Nov 2001 10:30:20 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"van der Bij",
"J. J.",
"",
"Faculty of Physics,\n Albert-Ludwigs-University, Freiburg, Germany"
],
[
"Radu",
"Eugen",
"",
"Faculty of Physics,\n Albert-Ludwigs-University, Freiburg, Germany"
]
] | A general relation for the total angular momentum of a regular solution of the Einstein-Yang-Mills-Higgs equations is derived. Two different physical configurations, rotating dyons and rotating magnetic dipoles are discussed as particular cases. The issue of rotating pure Einstein-Yang-Mills regular solutions is addres... |
1703.05699 | Enrico Barausse | Enrico Barausse | Testing the strong equivalence principle with gravitational-wave
observations of binary black holes | 8 pages. Submitted to the proceedings of the 3rd International
Symposium on "Quest for the Origin of Particles and the Universe", 5-7
January 2017, Nagoya University, Japan | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent LIGO detection of gravitational waves from black-hole binaries
offers the exciting possibility of testing gravitational theories in the
previously inaccessible strong-field, highly relativistic regime. While the
LIGO detections are so far consistent with the predictions of General
Relativity, future gravit... | [
{
"created": "Thu, 16 Mar 2017 16:23:54 GMT",
"version": "v1"
}
] | 2017-03-17 | [
[
"Barausse",
"Enrico",
""
]
] | The recent LIGO detection of gravitational waves from black-hole binaries offers the exciting possibility of testing gravitational theories in the previously inaccessible strong-field, highly relativistic regime. While the LIGO detections are so far consistent with the predictions of General Relativity, future gravitat... |
1107.5618 | Bethan Cropp | Bethan Cropp | Applications of, and Extensions to, Selected Exact Solutions in General
Relativity | MSc thesis at Victoria University of Wellington; 91 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this thesis we consider several aspects of general relativity relating to
exact solutions of the Einstein equations. In the first part gravitational
plane waves in the Rosen form are investigated, and we develop a formalism for
writing down any arbitrary polarisation in this form. In addition to this we
have exten... | [
{
"created": "Thu, 28 Jul 2011 02:29:05 GMT",
"version": "v1"
}
] | 2011-07-29 | [
[
"Cropp",
"Bethan",
""
]
] | In this thesis we consider several aspects of general relativity relating to exact solutions of the Einstein equations. In the first part gravitational plane waves in the Rosen form are investigated, and we develop a formalism for writing down any arbitrary polarisation in this form. In addition to this we have extende... |
1912.09286 | Hector O. Silva | Hector O. Silva, Kostas Glampedakis | Eikonal quasinormal modes of black holes beyond general relativity II:
generalised scalar-tensor perturbations | 11 pages. v2: matches published version | Phys. Rev. D 101, 044051 (2020) | 10.1103/PhysRevD.101.044051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole `spectroscopy', i.e. the identification of quasinormal mode
frequencies via gravitational wave observations, is a powerful technique for
testing the general relativistic nature of black holes. In theories of gravity
beyond general relativity perturbed black holes are typically described by a
set of coupled... | [
{
"created": "Thu, 19 Dec 2019 15:25:40 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Mar 2020 06:50:25 GMT",
"version": "v2"
}
] | 2020-03-04 | [
[
"Silva",
"Hector O.",
""
],
[
"Glampedakis",
"Kostas",
""
]
] | Black hole `spectroscopy', i.e. the identification of quasinormal mode frequencies via gravitational wave observations, is a powerful technique for testing the general relativistic nature of black holes. In theories of gravity beyond general relativity perturbed black holes are typically described by a set of coupled w... |
gr-qc/0605060 | Patrick Peter | Patrick Peter (IAP, France), Emanuel J. C. Pinho and Nelson Pinto-Neto
(CBPF, Brazil) | Gravitational wave background in perfect fluid quantum cosmologies | 12 pages, 5 figures, to appear in Phys. Rev. D (2006) | Phys.Rev. D73 (2006) 104017 | 10.1103/PhysRevD.73.104017 | null | gr-qc astro-ph hep-ph hep-th | null | We discuss the gravitational wave background produced by bouncing models
based on a full quantum evolution of a universe filled with a perfect fluid.
Using an ontological interpretation for the background wave function allows us
to solve the mode equations for the tensorial perturbations, and we find the
spectral ind... | [
{
"created": "Wed, 10 May 2006 15:03:27 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Peter",
"Patrick",
"",
"IAP, France"
],
[
"Pinho",
"Emanuel J. C.",
"",
"CBPF, Brazil"
],
[
"Pinto-Neto",
"Nelson",
"",
"CBPF, Brazil"
]
] | We discuss the gravitational wave background produced by bouncing models based on a full quantum evolution of a universe filled with a perfect fluid. Using an ontological interpretation for the background wave function allows us to solve the mode equations for the tensorial perturbations, and we find the spectral index... |
1805.12197 | Ott Vilson | Mihkel R\"unkla and Ott Vilson | Family of scalar-nonmetricity theories of gravity | 19 pages, REVTeX 4.1, we added references, wrote out explicitly a few
additional expressions, and extended discussion, taking into account also the
suggestions by the anonymous referee | Phys. Rev. D 98, 084034 (2018) | 10.1103/PhysRevD.98.084034 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the class of recently formulated scalar-nonmetricity theories by
coupling a five-parameter nonmetricity scalar to a scalar field and considering
a mixed kinetic term between the metric and the scalar field. The symmetric
teleparallel constraint is invoked by Lagrange multipliers or by inertial
variation. Th... | [
{
"created": "Wed, 30 May 2018 19:49:21 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Oct 2018 08:17:24 GMT",
"version": "v2"
}
] | 2018-10-23 | [
[
"Rünkla",
"Mihkel",
""
],
[
"Vilson",
"Ott",
""
]
] | We extend the class of recently formulated scalar-nonmetricity theories by coupling a five-parameter nonmetricity scalar to a scalar field and considering a mixed kinetic term between the metric and the scalar field. The symmetric teleparallel constraint is invoked by Lagrange multipliers or by inertial variation. The ... |
gr-qc/0603078 | Roland Steinbauer | Roland Steinbauer, James A. Vickers | The use of Generalised Functions and Distributions in General Relativity | Latex, 30 pages, final version, one reference added, to appear as
topical review in Class. Quantum Grav | Class.Quant.Grav. 23 (2006) R91-R114 | 10.1088/0264-9381/23/10/R01 | null | gr-qc | null | In this paper we review the extent to which one can use classical
distribution theory in describing solutions of Einstein's equations. We show
that there are a number of physically interesting cases which cannot be treated
using distribution theory but require a more general concept. We describe a
mathematical theory... | [
{
"created": "Mon, 20 Mar 2006 09:49:29 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Apr 2006 14:51:50 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Steinbauer",
"Roland",
""
],
[
"Vickers",
"James A.",
""
]
] | In this paper we review the extent to which one can use classical distribution theory in describing solutions of Einstein's equations. We show that there are a number of physically interesting cases which cannot be treated using distribution theory but require a more general concept. We describe a mathematical theory o... |
2010.02880 | Robert J. Scherrer | Cameron E. Norton and Robert J. Scherrer | The cosmological evolution of ultralight axionlike scalar fields | 9 pages, 6 figures | Phys. Rev. D 103, 023515 (2021) | 10.1103/PhysRevD.103.023515 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the cosmological evolution of ultralight axionlike (ULA) scalar
fields with potentials of the form $V(\phi) = m^2 f^2[1 - \cos(\phi/f)]^n$,
with particular emphasis on the deviation in their behavior from the
corresponding small$-\phi$ power-law approximations to these potentials:
$V(\phi) \propto \phi^{2n... | [
{
"created": "Tue, 6 Oct 2020 17:01:45 GMT",
"version": "v1"
}
] | 2021-01-13 | [
[
"Norton",
"Cameron E.",
""
],
[
"Scherrer",
"Robert J.",
""
]
] | We examine the cosmological evolution of ultralight axionlike (ULA) scalar fields with potentials of the form $V(\phi) = m^2 f^2[1 - \cos(\phi/f)]^n$, with particular emphasis on the deviation in their behavior from the corresponding small$-\phi$ power-law approximations to these potentials: $V(\phi) \propto \phi^{2n}$... |
2110.05785 | Salvador Robles-Perez | Salvador J. Robles-P\'erez | Quantum cosmology with third quantisation | 56 pages, 26 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the canonical quantisation of the geometry of the spacetime in the
cases of a simply and a non-simply connected manifold. In the former, we
analyse the information contained in the solutions of the Wheeler-DeWitt
equation and interpret them in terms of the customary boundary conditions that
are typically im... | [
{
"created": "Tue, 12 Oct 2021 07:33:03 GMT",
"version": "v1"
}
] | 2021-10-13 | [
[
"Robles-Pérez",
"Salvador J.",
""
]
] | We review the canonical quantisation of the geometry of the spacetime in the cases of a simply and a non-simply connected manifold. In the former, we analyse the information contained in the solutions of the Wheeler-DeWitt equation and interpret them in terms of the customary boundary conditions that are typically impo... |
gr-qc/0205092 | Elizabeth Winstanley | Elizabeth Winstanley | On the existence of conformally coupled scalar field hair for black
holes in (anti-)de Sitter space | Minor changes, 32 pages, 11 figures, uses kluwer.cls, klucite.sty | Found.Phys. 33 (2003) 111-143 | 10.1023/A:1022871809835 | null | gr-qc | null | The Einstein-conformally coupled scalar field system is studied in the
presence of a cosmological constant. We consider a massless or massive scalar
field with no additional self-interaction, and spherically symmetric black hole
geometries. When the cosmological constant is positive, no scalar hair can
exist and the ... | [
{
"created": "Tue, 21 May 2002 17:02:36 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Aug 2002 14:22:44 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Aug 2002 14:31:31 GMT",
"version": "v3"
}
] | 2022-10-12 | [
[
"Winstanley",
"Elizabeth",
""
]
] | The Einstein-conformally coupled scalar field system is studied in the presence of a cosmological constant. We consider a massless or massive scalar field with no additional self-interaction, and spherically symmetric black hole geometries. When the cosmological constant is positive, no scalar hair can exist and the on... |
1809.10075 | Wei-Liang Qian | Kai Lin and Yunqi Liu and Wei-Liang Qian | Higher dimensional power-Maxwell charged black holes in Einstein and
Rastall gravity | 12 pages | null | 10.1007/s10714-019-2548-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The black hole solutions in higher-dimensional spacetimes with the presence
of the power-Maxwell field, surrounded by quintessence, are investigated for
Einstein as well as Rastall gravity. The obtained solutions accommodate for
spherical, planar and hyperbolic symmetries with the presence of the
cosmological constan... | [
{
"created": "Wed, 26 Sep 2018 15:47:18 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Oct 2018 13:52:01 GMT",
"version": "v2"
},
{
"created": "Wed, 26 Dec 2018 15:10:39 GMT",
"version": "v3"
},
{
"created": "Sun, 5 May 2019 15:44:03 GMT",
"version": "v4"
}
] | 2019-05-22 | [
[
"Lin",
"Kai",
""
],
[
"Liu",
"Yunqi",
""
],
[
"Qian",
"Wei-Liang",
""
]
] | The black hole solutions in higher-dimensional spacetimes with the presence of the power-Maxwell field, surrounded by quintessence, are investigated for Einstein as well as Rastall gravity. The obtained solutions accommodate for spherical, planar and hyperbolic symmetries with the presence of the cosmological constant.... |
2404.03822 | Akshat Pandey | Akshat Pandey | Relativistic generalised uncertainty and the corrected vacuum energy | null | null | 10.1209/0295-5075/ad3a99 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this short paper we make use of the recent covariant extension of the
generalised uncertainty principle to study the corrections to the vacuum energy
of the simplest scalar quantum field theory. We then calculate the
modifications to the Casimir effect that such a correction to the vacuum energy
would bring about.... | [
{
"created": "Thu, 4 Apr 2024 22:45:26 GMT",
"version": "v1"
}
] | 2024-04-08 | [
[
"Pandey",
"Akshat",
""
]
] | In this short paper we make use of the recent covariant extension of the generalised uncertainty principle to study the corrections to the vacuum energy of the simplest scalar quantum field theory. We then calculate the modifications to the Casimir effect that such a correction to the vacuum energy would bring about. W... |
2201.01672 | Marcello Ortaggio | David Koko\v{s}ka, Marcello Ortaggio | Robinson-Trautman spacetimes coupled to conformally invariant
electrodynamics in higher dimensions | 5 pages. Short summary of arXiv:2109.08886. Presented at the 7th
Conference of the Polish Society on Relativity, Lodz, Poland, 20--23.09.2021.
To appear in Acta Phys. Pol. B Proc. Suppl.. v2: an issue with some fonts
fixed | Acta Physica Polonica B Proceedings Series 15, 1-A8 (2022) | 10.5506/APhysPolBSupp.15.1-A8 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We summarize recent results on $D$-dimensional Robinson-Trautman solutions of
Einstein's gravity in the presence of a conformally invariant non-linear
electromagnetic field and a cosmological constant. These spacetimes contain
static dyonic black holes with various horizon geometries and their
time-dependent radiatin... | [
{
"created": "Wed, 5 Jan 2022 16:00:25 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Jan 2022 12:17:17 GMT",
"version": "v2"
}
] | 2022-02-01 | [
[
"Kokoška",
"David",
""
],
[
"Ortaggio",
"Marcello",
""
]
] | We summarize recent results on $D$-dimensional Robinson-Trautman solutions of Einstein's gravity in the presence of a conformally invariant non-linear electromagnetic field and a cosmological constant. These spacetimes contain static dyonic black holes with various horizon geometries and their time-dependent radiating ... |
1801.09120 | Emil Nissimov | Eduardo Guendelman, Emil Nissimov, Svetlana Pacheva | Quintessence, Unified Dark Energy and Dark Matter, and
Confinement/Deconfinement Mechanism | 16 pages, to appear in the proceedings "Ninth Meeting in Modern
Mathematical Physics", eds. B. Dragovich et.al., Belgrade Inst. Phys. Press
(2018) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a new type of generalized gravity-matter models where
$f(R)=R+R^2$ gravity couples in a non-conventional way to a scalar "inflaton"
field, to a second scalar "darkon" field responsible for dark energy/dark
matter unification, as well as to a non-standard nonlinear gauge field system,
which is responsible ... | [
{
"created": "Sat, 27 Jan 2018 18:33:00 GMT",
"version": "v1"
}
] | 2018-01-30 | [
[
"Guendelman",
"Eduardo",
""
],
[
"Nissimov",
"Emil",
""
],
[
"Pacheva",
"Svetlana",
""
]
] | We describe a new type of generalized gravity-matter models where $f(R)=R+R^2$ gravity couples in a non-conventional way to a scalar "inflaton" field, to a second scalar "darkon" field responsible for dark energy/dark matter unification, as well as to a non-standard nonlinear gauge field system, which is responsible fo... |
1708.01150 | Laura Sberna | Laura Sberna | Early-universe cosmology in Einstein-scalar-Gauss-Bonnet gravity | Master thesis, 118 pages, 84 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Theoretical arguments and cosmological observations suggest that Einstein's
theory of general relativity needs to be modified at high energies. One of the
best motivated higher-curvature extensions of general relativity is
Einstein-scalar-Gauss-Bonnet gravity, in which a scalar field is coupled to
quadratic curvature... | [
{
"created": "Wed, 2 Aug 2017 13:52:34 GMT",
"version": "v1"
}
] | 2017-08-04 | [
[
"Sberna",
"Laura",
""
]
] | Theoretical arguments and cosmological observations suggest that Einstein's theory of general relativity needs to be modified at high energies. One of the best motivated higher-curvature extensions of general relativity is Einstein-scalar-Gauss-Bonnet gravity, in which a scalar field is coupled to quadratic curvature i... |
1902.04542 | Norbert Bodendorfer | Norbert Bodendorfer, Fabio M. Mele, Johannes M\"unch | Effective Quantum Extended Spacetime of Polymer Schwarzschild Black Hole | 50 pages, 10 figures; v2: journal version, minor comment and
references added; v3: minor corrections in section 5.3 to match journal
version | Class. Quantum Grav. 36 (2019) 195015 | 10.1088/1361-6382/ab3f16 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The physical interpretation and eventual fate of gravitational singularities
in a theory surpassing classical general relativity are puzzling questions that
have generated a great deal of interest among various quantum gravity
approaches. In the context of loop quantum gravity (LQG), one of the major
candidates for a... | [
{
"created": "Tue, 12 Feb 2019 18:42:03 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Oct 2019 08:36:33 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Nov 2019 13:29:05 GMT",
"version": "v3"
}
] | 2019-11-06 | [
[
"Bodendorfer",
"Norbert",
""
],
[
"Mele",
"Fabio M.",
""
],
[
"Münch",
"Johannes",
""
]
] | The physical interpretation and eventual fate of gravitational singularities in a theory surpassing classical general relativity are puzzling questions that have generated a great deal of interest among various quantum gravity approaches. In the context of loop quantum gravity (LQG), one of the major candidates for a n... |
1410.2274 | William C. C. Lima | Andr\'e G. S. Landulfo, William C. C. Lima, George E. A. Matsas, and
Daniel A. T. Vanzella | From quantum to classical instability in relativistic stars | 16 pages. Minor changes to match the published version | Phys. Rev. D 91, 024011 (2015) | 10.1103/PhysRevD.91.024011 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown that gravitational fields produced by realistic
classical-matter distributions can force quantum vacuum fluctuations of some
nonminimally coupled free scalar fields to undergo a phase of exponential
growth. The consequences of this unstable phase to the background spacetime
have not been addressed s... | [
{
"created": "Wed, 8 Oct 2014 20:48:29 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Nov 2014 16:18:49 GMT",
"version": "v2"
},
{
"created": "Thu, 8 Jan 2015 14:53:33 GMT",
"version": "v3"
}
] | 2015-01-09 | [
[
"Landulfo",
"André G. S.",
""
],
[
"Lima",
"William C. C.",
""
],
[
"Matsas",
"George E. A.",
""
],
[
"Vanzella",
"Daniel A. T.",
""
]
] | It has been shown that gravitational fields produced by realistic classical-matter distributions can force quantum vacuum fluctuations of some nonminimally coupled free scalar fields to undergo a phase of exponential growth. The consequences of this unstable phase to the background spacetime have not been addressed so ... |
0707.1182 | Subenoy Chakraborty | Subenoy Chakraborty and Tanwi Bandyopadhyay | Schwarzschild Solution on the Brane | 3 pages | Int.J.Theor.Phys.47:2493-2499,2008 | 10.1007/s10773-008-9682-5 | null | gr-qc | null | In this communication we have shown that Schwarzschild solution is possible
in brane world for some specific choices of brane matter and the non local
effects from the bulk. A conformally flat bulk space time with fine-tuned
vacuum energy (brane tension) shows that, Schwarzschild solution may also be
the vacuum solut... | [
{
"created": "Mon, 9 Jul 2007 06:07:49 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Chakraborty",
"Subenoy",
""
],
[
"Bandyopadhyay",
"Tanwi",
""
]
] | In this communication we have shown that Schwarzschild solution is possible in brane world for some specific choices of brane matter and the non local effects from the bulk. A conformally flat bulk space time with fine-tuned vacuum energy (brane tension) shows that, Schwarzschild solution may also be the vacuum solutio... |
2112.04736 | Avishek Dusoye | Avishek Dusoye, Alvaro de la Cruz-Dombriz, Peter Dunsby, and Nelson J.
Nunes | Constraining disformal couplings with Redshift Space Distortion | 20 pages, 3 figures, 1 table, Version published in JCAP01(2023)001,
Minor Changes | JCAP01(2023)001 | 10.1088/1475-7516/2023/01/001 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a quintessence model for which the scalar field is disformally
coupled to dark matter. The background mimics the LCDM cosmological evolution
and the quintessence potential is not specified. A disformal effect due to the
quintessential mass is seen in the growth rate of the cosmological structure on
large sca... | [
{
"created": "Thu, 9 Dec 2021 07:33:53 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Mar 2023 11:45:37 GMT",
"version": "v2"
}
] | 2023-03-10 | [
[
"Dusoye",
"Avishek",
""
],
[
"de la Cruz-Dombriz",
"Alvaro",
""
],
[
"Dunsby",
"Peter",
""
],
[
"Nunes",
"Nelson J.",
""
]
] | We study a quintessence model for which the scalar field is disformally coupled to dark matter. The background mimics the LCDM cosmological evolution and the quintessence potential is not specified. A disformal effect due to the quintessential mass is seen in the growth rate of the cosmological structure on large scale... |
gr-qc/0601013 | Simone Mercuri | Simone Mercuri | Fermions in Ashtekar-Barbero Connections Formalism for Arbitrary Values
of the Immirzi Parameter | 15 pp., no figures, title changed, version accepted for publication
on Phys. Rev. D | Phys.Rev. D73 (2006) 084016 | 10.1103/PhysRevD.73.084016 | null | gr-qc hep-th | null | The Ashtekar-Barbero-Immirzi formulation of General Relativity is extended to
include spinor matter fields. Our formulation applies to generic values of the
Immirzi parameter and reduces to the Ashtekar-Romano-Tate approach when the
Immirzi parameter is taken equal to the imaginary unit. The dynamics of the
gravity-f... | [
{
"created": "Wed, 4 Jan 2006 14:43:48 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Mar 2006 10:23:40 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Mercuri",
"Simone",
""
]
] | The Ashtekar-Barbero-Immirzi formulation of General Relativity is extended to include spinor matter fields. Our formulation applies to generic values of the Immirzi parameter and reduces to the Ashtekar-Romano-Tate approach when the Immirzi parameter is taken equal to the imaginary unit. The dynamics of the gravity-fer... |
2401.02761 | Mohamad Afshar | Jafar Sadeghi, Mohammad Ali S. Afshar, Mohammad Reza Alipour, Saeed
Noori Gashti | Investigation of hidden symmetry in $AdS_{5}$ black hole with Heun
equation | 20 pages, Accepted for publication in International Journal of Modern
Physics A | International Journal of Modern Physics A, Volume 39, Issue 1, id.
2450001-79,January 2024 | 10.1142/S0217751X24500015 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Investigating the existence of algebra and finding hidden symmetries in
physical systems is one of the most important aspects for understanding their
behavior and predicting their future. Expanding this unique method of study to
cosmic structures and combining past knowledge with new data can be very
interesting and ... | [
{
"created": "Fri, 5 Jan 2024 11:34:39 GMT",
"version": "v1"
}
] | 2024-08-15 | [
[
"Sadeghi",
"Jafar",
""
],
[
"Afshar",
"Mohammad Ali S.",
""
],
[
"Alipour",
"Mohammad Reza",
""
],
[
"Gashti",
"Saeed Noori",
""
]
] | Investigating the existence of algebra and finding hidden symmetries in physical systems is one of the most important aspects for understanding their behavior and predicting their future. Expanding this unique method of study to cosmic structures and combining past knowledge with new data can be very interesting and le... |
2007.16019 | Kimet Jusufi | Kimet Jusufi | Correspondence between quasinormal modes and the shadow radius in a
wormhole spacetime | 10 pages, 5 figures. Published in GERG | Gen. Relativ. Gravit. 53, 87 (2021) | 10.1007/s10714-021-02856-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the correspondence between the real part of
quasinormal modes (QNMs) and the shadow radius in a wormhole spacetime. Firstly
we consider the above correspondence in a static and spherically symmetric
wormhole spacetime and then explore this correspondence numerically by
considering different wor... | [
{
"created": "Thu, 30 Jul 2020 15:14:20 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Sep 2021 07:45:13 GMT",
"version": "v2"
}
] | 2021-09-21 | [
[
"Jusufi",
"Kimet",
""
]
] | In this paper we study the correspondence between the real part of quasinormal modes (QNMs) and the shadow radius in a wormhole spacetime. Firstly we consider the above correspondence in a static and spherically symmetric wormhole spacetime and then explore this correspondence numerically by considering different wormh... |
2103.06976 | Jean-Baptiste Bayle | Jean-Baptiste Bayle, Olaf Hartwig, Martin Staab | Adapting time-delay interferometry for LISA data in frequency | 7 pages, 4 figures | Phys. Rev. D 104, 023006 (2021) | 10.1103/PhysRevD.104.023006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Time-delay interferometry (TDI) is a post-processing technique used to reduce
laser noise in heterodyne interferometric measurements with unequal armlengths,
a situation characteristic of space gravitational detectors such as Laser
Interferometer Space Antenna (LISA). This technique consists in properly
time-shifting... | [
{
"created": "Thu, 11 Mar 2021 21:58:04 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jun 2021 18:35:34 GMT",
"version": "v2"
}
] | 2021-07-14 | [
[
"Bayle",
"Jean-Baptiste",
""
],
[
"Hartwig",
"Olaf",
""
],
[
"Staab",
"Martin",
""
]
] | Time-delay interferometry (TDI) is a post-processing technique used to reduce laser noise in heterodyne interferometric measurements with unequal armlengths, a situation characteristic of space gravitational detectors such as Laser Interferometer Space Antenna (LISA). This technique consists in properly time-shifting a... |
1209.1971 | Piotr T. Chru\'sciel | Piotr T. Chru\'sciel | The existence theorem for the general relativistic Cauchy problem on the
light-cone | null | null | null | Preprint UWThPh-2012-29 | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove existence of solutions of the vacuum Einstein equations with initial
data induced by a smooth metric on a light-cone.
| [
{
"created": "Mon, 10 Sep 2012 12:52:24 GMT",
"version": "v1"
}
] | 2012-09-11 | [
[
"Chruściel",
"Piotr T.",
""
]
] | We prove existence of solutions of the vacuum Einstein equations with initial data induced by a smooth metric on a light-cone. |
1801.09503 | Chiang-Mei Chen | Chiang-Mei Chen, James M. Nester | Gravitational Energy and the Gauge Theory Perspective | Chapter 6 in "Memorial Volume for Yi-Shi Duan", eds. M.-L. Ge, R.-G.
Cai and Y.-X. Liu (World Scientific, 2018) pp. 169-187 | null | 10.1142/9789813237278_0006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravity, and the puzzle regarding its energy, can be understood from a gauge
theory perspective. Gravity, i.e., dynamical spacetime geometry, can be
considered as a local gauge theory of the symmetry group of Minkowski
spacetime: the Poincare group. The dynamical potentials of the Poincare gauge
theory of gravity are... | [
{
"created": "Mon, 29 Jan 2018 13:48:34 GMT",
"version": "v1"
}
] | 2018-01-30 | [
[
"Chen",
"Chiang-Mei",
""
],
[
"Nester",
"James M.",
""
]
] | Gravity, and the puzzle regarding its energy, can be understood from a gauge theory perspective. Gravity, i.e., dynamical spacetime geometry, can be considered as a local gauge theory of the symmetry group of Minkowski spacetime: the Poincare group. The dynamical potentials of the Poincare gauge theory of gravity are t... |
2010.01393 | Klaus Morawetz | Klaus Morawetz | Consistent solution of Einstein-Cartan equations with torsion outside
matter | misprints corrected | Class. Quantum Grav. 38 (2021) 205003 | 10.1088/1361-6382/ac2417 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein-Cartan equations in first-order action of torsion are
considered. From Belinfante-Rosenfeld equation special consistence conditions
are derived for the torsion parameters relating them to the metric. Inside
matter the torsion is given by the spin which leads to an extended
Oppenhaimer-Volkov equation. Ou... | [
{
"created": "Sat, 3 Oct 2020 17:10:24 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Apr 2021 12:13:00 GMT",
"version": "v2"
},
{
"created": "Tue, 31 Aug 2021 10:32:57 GMT",
"version": "v3"
}
] | 2022-10-27 | [
[
"Morawetz",
"Klaus",
""
]
] | The Einstein-Cartan equations in first-order action of torsion are considered. From Belinfante-Rosenfeld equation special consistence conditions are derived for the torsion parameters relating them to the metric. Inside matter the torsion is given by the spin which leads to an extended Oppenhaimer-Volkov equation. Outs... |
0908.3224 | Bahram Mashhoon | Bahram Mashhoon | Nonlocal Transformations for Accelerated Observers | 8 pages, accepted for publication in Ann. Phys. (Berlin) | AnnalenPhys.18:640-648,2009 | 10.1002/andp.20095210906 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | According to the locality postulate of special relativity, the measurements
of physical fields by accelerated observers at a given event in Minkowski
spacetime are related to each other by the representations of the Lorentz
group. Nonlocal extensions of these representations are necessary, however,
once acceleration-... | [
{
"created": "Sat, 22 Aug 2009 01:38:03 GMT",
"version": "v1"
}
] | 2022-06-15 | [
[
"Mashhoon",
"Bahram",
""
]
] | According to the locality postulate of special relativity, the measurements of physical fields by accelerated observers at a given event in Minkowski spacetime are related to each other by the representations of the Lorentz group. Nonlocal extensions of these representations are necessary, however, once acceleration-in... |
gr-qc/0605129 | Alexander Goltsev | Alexander S. Lukyanenko and Inna A. Lukyanenko | Path integral representation of the evolution operator for the Dirac
equation | 3 pages | null | 10.1117/12.726706 | null | gr-qc | null | A path integral representation of the evolution operator for the
four-dimensional Dirac equation is proposed. A quadratic form of the canonical
momenta regularizes the original representation of the path integral in the
electron phase space. This regularization allows to obtain a representation of
the path integral o... | [
{
"created": "Thu, 25 May 2006 06:23:50 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Lukyanenko",
"Alexander S.",
""
],
[
"Lukyanenko",
"Inna A.",
""
]
] | A path integral representation of the evolution operator for the four-dimensional Dirac equation is proposed. A quadratic form of the canonical momenta regularizes the original representation of the path integral in the electron phase space. This regularization allows to obtain a representation of the path integral ove... |
2111.09058 | Sergey Yu. Vernov | Vsevolod R. Ivanov, Sergei V. Ketov, Ekaterina O. Pozdeeva, Sergey Yu.
Vernov | Analytic extensions of Starobinsky model of inflation | 30 pages, 10 figures; minor additions, references added; the version
to appear in JCAP | JCAP 03 (2022) 058 | 10.1088/1475-7516/2022/03/058 | IPMU21-0073 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study several extensions of the Starobinsky model of inflation, which obey
all observational constraints on the inflationary parameters, by demanding that
both the inflaton scalar potential in the Einstein frame and the $F(R)$ gravity
function in the Jordan frame have the explicit dependence upon fields {\it and}
... | [
{
"created": "Wed, 17 Nov 2021 11:57:15 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Nov 2021 17:27:15 GMT",
"version": "v2"
},
{
"created": "Tue, 8 Mar 2022 09:29:23 GMT",
"version": "v3"
}
] | 2022-03-30 | [
[
"Ivanov",
"Vsevolod R.",
""
],
[
"Ketov",
"Sergei V.",
""
],
[
"Pozdeeva",
"Ekaterina O.",
""
],
[
"Vernov",
"Sergey Yu.",
""
]
] | We study several extensions of the Starobinsky model of inflation, which obey all observational constraints on the inflationary parameters, by demanding that both the inflaton scalar potential in the Einstein frame and the $F(R)$ gravity function in the Jordan frame have the explicit dependence upon fields {\it and} pa... |
0905.0687 | Peter Shawhan | S. Ballmer (Syracuse U. / TAMA-NAOJ / LIGO-Caltech), S. M\'arka
(Columbia University), P. Shawhan (University of Maryland) | Feasibility of measuring the Shapiro time delay over meter-scale
distances | 13 pages, 6 figures; v3 has updated instrumental noise curves plus a
few text edits; resubmitted to Classical and Quantum Gravity | Class.Quant.Grav.27:185018,2010 | 10.1088/0264-9381/27/18/185018 | LIGO-P080029 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The time delay of light as it passes by a massive object, first calculated by
Shapiro in 1964, is a hallmark of the curvature of space-time. To date, all
measurements of the Shapiro time delay have been made over solar-system
distance scales. We show that the new generation of kilometer-scale laser
interferometers be... | [
{
"created": "Tue, 5 May 2009 20:00:04 GMT",
"version": "v1"
},
{
"created": "Mon, 10 May 2010 21:14:16 GMT",
"version": "v2"
},
{
"created": "Tue, 13 Jul 2010 17:10:56 GMT",
"version": "v3"
}
] | 2014-11-18 | [
[
"Ballmer",
"S.",
"",
"Syracuse U. / TAMA-NAOJ / LIGO-Caltech"
],
[
"Márka",
"S.",
"",
"Columbia University"
],
[
"Shawhan",
"P.",
"",
"University of Maryland"
]
] | The time delay of light as it passes by a massive object, first calculated by Shapiro in 1964, is a hallmark of the curvature of space-time. To date, all measurements of the Shapiro time delay have been made over solar-system distance scales. We show that the new generation of kilometer-scale laser interferometers bein... |
0908.3797 | Ertan G\"okl\"u | Ertan G\"okl\"u and Claus L\"ammerzahl | Fluctuations of spacetime and holographic noise in atomic interferometry | Talk at the "Workshop on Gravitational Waves Detection with Atom
Interferometry", Florence, Galileo Galilei Institute for Theoretical Physics,
February 23-24, 2009. 15 pages | Gen.Rel.Grav.43:2065-2088,2011 | 10.1007/s10714-010-1137-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Space--time can be understood as some kind of space--time foam of fluctuating
bubbles or loops which are expected to be an outcome of a theory of quantum
gravity. One recently discussed model for this kind of space--time fluctuations
is the holographic principle which allows to deduce the structure of these
fluctuati... | [
{
"created": "Wed, 26 Aug 2009 11:47:52 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Aug 2009 11:34:55 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Nov 2009 14:41:22 GMT",
"version": "v3"
}
] | 2011-06-02 | [
[
"Göklü",
"Ertan",
""
],
[
"Lämmerzahl",
"Claus",
""
]
] | Space--time can be understood as some kind of space--time foam of fluctuating bubbles or loops which are expected to be an outcome of a theory of quantum gravity. One recently discussed model for this kind of space--time fluctuations is the holographic principle which allows to deduce the structure of these fluctuation... |
2003.12771 | Tsutomu Kobayashi | Tsutomu Kobayashi | Effective scalar-tensor description of regularized Lovelock gravity in
four dimensions | v2: version to appear in JCAP, 7 pages | null | 10.1088/1475-7516/2020/07/013 | RUP-20-11 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reformulate the recently proposed regularized version of Lovelock gravity
in four dimensions as a scalar-tensor theory. By promoting the warp factor of
the internal space to a scalar degree of freedom by means of Kaluza-Klein
reduction, we show that regularized Lovelock gravity can be described
effectively by a ce... | [
{
"created": "Sat, 28 Mar 2020 11:34:20 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Jul 2020 09:31:22 GMT",
"version": "v2"
}
] | 2020-07-22 | [
[
"Kobayashi",
"Tsutomu",
""
]
] | We reformulate the recently proposed regularized version of Lovelock gravity in four dimensions as a scalar-tensor theory. By promoting the warp factor of the internal space to a scalar degree of freedom by means of Kaluza-Klein reduction, we show that regularized Lovelock gravity can be described effectively by a cert... |
gr-qc/0510055 | Fernando P. Devecchi | F. P. Devecchi and M. L. Froehlich | 3D gravity and non-linear cosmology | 7 pages, to appear in Mod. Phys. Lett | Mod.Phys.Lett. A21 (2006) 445-450 | 10.1142/S0217732306018974 | null | gr-qc | null | By the inclusion of an additional term, non-linear in the scalar curvature
$R$, it is tested if dark energy could rise as a geometrical effect in 3D
gravitational formulations. We investigate a cosmological fluid obeying a
non-polytropic equation of state (the van der Waals equation) that is used to
construct the ene... | [
{
"created": "Tue, 11 Oct 2005 16:47:16 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Devecchi",
"F. P.",
""
],
[
"Froehlich",
"M. L.",
""
]
] | By the inclusion of an additional term, non-linear in the scalar curvature $R$, it is tested if dark energy could rise as a geometrical effect in 3D gravitational formulations. We investigate a cosmological fluid obeying a non-polytropic equation of state (the van der Waals equation) that is used to construct the energ... |
1804.03012 | Luis Castro B | Francisco A. Cruz Neto, Luis B. Castro | Comment on "Effects of cosmic-string framework on the thermodynamical
properties of anharmonic oscillator using the ordinary statistics and the
q-deformed superstatistics approaches" | 3 pages | Eur.Phys.J. C78 (2018) no.6, 494 | 10.1140/epjc/s10052-018-5847-4 | null | gr-qc hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We point out a misleading treatment in a recent paper published in this
Journal [Eur. Phys. J. C (2018)78:106] regarding solutions for the
Schr\"{o}dinger equation with a anharmonic oscillator potential embedded in the
background of a cosmic string mapped into biconfluent Heun equation. This fact
jeopardizes the ther... | [
{
"created": "Fri, 6 Apr 2018 13:15:14 GMT",
"version": "v1"
}
] | 2019-04-17 | [
[
"Neto",
"Francisco A. Cruz",
""
],
[
"Castro",
"Luis B.",
""
]
] | We point out a misleading treatment in a recent paper published in this Journal [Eur. Phys. J. C (2018)78:106] regarding solutions for the Schr\"{o}dinger equation with a anharmonic oscillator potential embedded in the background of a cosmic string mapped into biconfluent Heun equation. This fact jeopardizes the thermo... |
1810.05464 | Sabine Hossenfelder | Sabine Hossenfelder, Tobias Zingg | Analog Models for Holographic Transport | 19 pages, 1 figure, minor revisions | Phys. Rev. D 100, 056015 (2019) | 10.1103/PhysRevD.100.056015 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gauge-gravity duality and analog gravity both relate a condensed matter
system to a gravitational theory. This makes it possible to use gravity as an
intermediary to establish a relation between two different condensed matter
systems: The strongly coupled system from the gauge-gravity duality and the
weakly coupl... | [
{
"created": "Fri, 12 Oct 2018 12:02:32 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Oct 2018 16:04:54 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Mar 2020 13:47:40 GMT",
"version": "v3"
}
] | 2020-03-18 | [
[
"Hossenfelder",
"Sabine",
""
],
[
"Zingg",
"Tobias",
""
]
] | The gauge-gravity duality and analog gravity both relate a condensed matter system to a gravitational theory. This makes it possible to use gravity as an intermediary to establish a relation between two different condensed matter systems: The strongly coupled system from the gauge-gravity duality and the weakly coupled... |
gr-qc/0009064 | Matthew D. Duez | Matthew D. Duez, Thomas W. Baumgarte and Stuart L. Shapiro | Computing the Complete Gravitational Wavetrain from Relativistic Binary
Inspiral | 4 pages, 4 figures | Phys.Rev. D63 (2001) 084030 | 10.1103/PhysRevD.63.084030 | null | gr-qc astro-ph | null | We present a new method for generating the nonlinear gravitational wavetrain
from the late inspiral (pre-coalescence) phase of a binary neutron star system
by means of a numerical evolution calculation in full general relativity. In a
prototype calculation, we produce 214 wave cycles from corotating polytropes,
repre... | [
{
"created": "Mon, 18 Sep 2000 20:08:43 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Duez",
"Matthew D.",
""
],
[
"Baumgarte",
"Thomas W.",
""
],
[
"Shapiro",
"Stuart L.",
""
]
] | We present a new method for generating the nonlinear gravitational wavetrain from the late inspiral (pre-coalescence) phase of a binary neutron star system by means of a numerical evolution calculation in full general relativity. In a prototype calculation, we produce 214 wave cycles from corotating polytropes, represe... |
1908.04095 | Alex Bernardini Dr. | Alex E. Bernardini and Roldao da Rocha | Cosmological comoving behavior of the configurational entropy | 06 pages, 03 figs | Physics Letters B 796, 107 (2019) | 10.1016/j.physletb.2019.07.028 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown that a functional dependence of the configurational entropy
(CE) density exhibits a cosmological comoving behavior related to the scale
parameter, $a$, of the FRW flat universe. Such a circumstantial comoving
behavior shows that the CE evolves with $a^{-3}$ for fermionic and bosonic
radiation and wi... | [
{
"created": "Mon, 12 Aug 2019 11:24:45 GMT",
"version": "v1"
}
] | 2019-08-13 | [
[
"Bernardini",
"Alex E.",
""
],
[
"da Rocha",
"Roldao",
""
]
] | It has been shown that a functional dependence of the configurational entropy (CE) density exhibits a cosmological comoving behavior related to the scale parameter, $a$, of the FRW flat universe. Such a circumstantial comoving behavior shows that the CE evolves with $a^{-3}$ for fermionic and bosonic radiation and with... |
2401.10905 | Yiqian Chen | Yiqian Chen, Peng Wang, and Haitang Yang | Observations of Orbiting Hot Spots around Scalarized
Reissner-Nordstr\"om Black Holes | 22 pages, 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper investigates the observational signatures of hot spots orbiting
scalarized Reissner-Nordstr\"om black holes, which have been reported to
possess multiple photon spheres. In contrast to the single-photon sphere case,
hot spots orbiting black holes with two photon spheres produce additional image
tracks in t... | [
{
"created": "Thu, 4 Jan 2024 08:45:33 GMT",
"version": "v1"
}
] | 2024-01-23 | [
[
"Chen",
"Yiqian",
""
],
[
"Wang",
"Peng",
""
],
[
"Yang",
"Haitang",
""
]
] | This paper investigates the observational signatures of hot spots orbiting scalarized Reissner-Nordstr\"om black holes, which have been reported to possess multiple photon spheres. In contrast to the single-photon sphere case, hot spots orbiting black holes with two photon spheres produce additional image tracks in tim... |
1809.06348 | Yen Chin Ong | Yen Chin Ong, Yuan Yao | Generalized Uncertainty Principle and White Dwarfs Redux: How
Cosmological Constant Protects Chandrasekhar Limit | 7 pages, 5 figures. Improved discussions accepted by PRD | Phys. Rev. D 98, 126018 (2018) | 10.1103/PhysRevD.98.126018 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was previously argued that generalized uncertainty principle (GUP) with a
positive parameter removes the Chandrasekhar limit. One way to restore the
limit is by taking the GUP parameter to be negative. In this work we discuss an
alternative method that achieves the same effect: by including a cosmological
constant... | [
{
"created": "Mon, 17 Sep 2018 17:37:34 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Dec 2018 06:29:02 GMT",
"version": "v2"
}
] | 2019-01-02 | [
[
"Ong",
"Yen Chin",
""
],
[
"Yao",
"Yuan",
""
]
] | It was previously argued that generalized uncertainty principle (GUP) with a positive parameter removes the Chandrasekhar limit. One way to restore the limit is by taking the GUP parameter to be negative. In this work we discuss an alternative method that achieves the same effect: by including a cosmological constant t... |
2401.15125 | Bivudutta Mishra Dr. | S.A.Kadam, B.Mishra | Constraining $f(T,B,T_G,B_G)$ gravity by dynamical system analysis | 17 pages, 4 figures, 6 tables. Constructive comments are welcome | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The evolutionary behavior of the Universe has been analysed through the
dynamical system analysis in $f(T,B,T_G,B_G)$ gravity, where $T$, $B$, $T_G$,
and $B_G$ respectively represent torsion, boundary term, teleparallel
Gauss-Bonnet term and Gauss-Bonnet boundary term. We use the transformation,
$f(T,B,T_G,B_G)=-T+\m... | [
{
"created": "Fri, 26 Jan 2024 11:49:35 GMT",
"version": "v1"
}
] | 2024-01-30 | [
[
"Kadam",
"S. A.",
""
],
[
"Mishra",
"B.",
""
]
] | The evolutionary behavior of the Universe has been analysed through the dynamical system analysis in $f(T,B,T_G,B_G)$ gravity, where $T$, $B$, $T_G$, and $B_G$ respectively represent torsion, boundary term, teleparallel Gauss-Bonnet term and Gauss-Bonnet boundary term. We use the transformation, $f(T,B,T_G,B_G)=-T+\mat... |
gr-qc/0703078 | Yu Tian | Han-Ying Guo, Chao-Guang Huang, Yu Tian, Hong-Tu Wu, Zhan Xu, Bin Zhou | Snyder's Model -- de Sitter Special Relativity Duality and de Sitter
Gravity | 32 pages | Class.Quant.Grav.24:4009-4036,2007 | 10.1088/0264-9381/24/16/004 | null | gr-qc | null | Between Snyder's quantized space-time model in de Sitter space of momenta and
the \dS special relativity on \dS-spacetime of radius $R$ with Beltrami
coordinates, there is a one-to-one dual correspondence supported by a minimum
uncertainty-like argument. Together with Planck length $\ell_P$, $R\simeq
(3/\Lambda)^{1/2... | [
{
"created": "Wed, 14 Mar 2007 04:11:55 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Aug 2007 03:05:51 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Guo",
"Han-Ying",
""
],
[
"Huang",
"Chao-Guang",
""
],
[
"Tian",
"Yu",
""
],
[
"Wu",
"Hong-Tu",
""
],
[
"Xu",
"Zhan",
""
],
[
"Zhou",
"Bin",
""
]
] | Between Snyder's quantized space-time model in de Sitter space of momenta and the \dS special relativity on \dS-spacetime of radius $R$ with Beltrami coordinates, there is a one-to-one dual correspondence supported by a minimum uncertainty-like argument. Together with Planck length $\ell_P$, $R\simeq (3/\Lambda)^{1/2}$... |
gr-qc/9703010 | Arlen Anderson | Andrew Abrahams, Arlen Anderson, Yvonne Choquet-Bruhat, and James W.
York, Jr | Hyperbolic Formulation of General Relativity | 3 pp., LaTeX (uses sprocl.sty), contribution to Proceedings of the
1996 Texas Symposium on Relativistic Astrophysics | null | null | IFP-UNC-520, TAR-UNC-055 | gr-qc | null | Two geometrical well-posed hyperbolic formulations of general relativity are
described. One admits any time-slicing which preserves a generalized harmonic
condition. The other admits arbitrary time-slicings. Both systems have only the
physical characteristic speeds of zero and the speed of light.
| [
{
"created": "Tue, 4 Mar 1997 15:11:22 GMT",
"version": "v1"
}
] | 2012-08-27 | [
[
"Abrahams",
"Andrew",
""
],
[
"Anderson",
"Arlen",
""
],
[
"Choquet-Bruhat",
"Yvonne",
""
],
[
"York,",
"James W.",
"Jr"
]
] | Two geometrical well-posed hyperbolic formulations of general relativity are described. One admits any time-slicing which preserves a generalized harmonic condition. The other admits arbitrary time-slicings. Both systems have only the physical characteristic speeds of zero and the speed of light. |
gr-qc/9906093 | Piret Kuusk | Piret Kuusk | Geodesic multiplication and quantum kinematics in a Newtonian spacetime | 10 pages, LaTex, submitted to "Webs and Quasigroups 1998-1999" (Tver
State University, Tver) | Webs & Quasigroups 1998-1999, ed. A. Shelekhov, Tver, 1999, pp.
127-136 | null | IP-TH-99-1 | gr-qc | null | We consider a quantum test particle in the background of a Newtonian
gravitational field in the framework of Cartan's formulation of nonrelativistic
spacetimes. We have proposed a novel quantization of a point particle which
amounts to introducing its position operators as multiplication with the
corresponding Rieman... | [
{
"created": "Wed, 23 Jun 1999 11:05:46 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kuusk",
"Piret",
""
]
] | We consider a quantum test particle in the background of a Newtonian gravitational field in the framework of Cartan's formulation of nonrelativistic spacetimes. We have proposed a novel quantization of a point particle which amounts to introducing its position operators as multiplication with the corresponding Riemann ... |
1611.08584 | Nora Breton | Nora Breton | Energy Extraction from the Einstein-Born-Infeld Black Hole | 10 pages, 7 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The energy extraction from a Einstein-Born-Infeld (EBI) black hole is
addressed determining the extension of the ergosphere as well as the
extractable energy using the irreducible mass concept. These results are
compared with the Reissner-Nordstrom (RN) ones; RN is the linear
electromagnetic counterpart of the BI bla... | [
{
"created": "Fri, 25 Nov 2016 20:57:27 GMT",
"version": "v1"
}
] | 2016-11-28 | [
[
"Breton",
"Nora",
""
]
] | The energy extraction from a Einstein-Born-Infeld (EBI) black hole is addressed determining the extension of the ergosphere as well as the extractable energy using the irreducible mass concept. These results are compared with the Reissner-Nordstrom (RN) ones; RN is the linear electromagnetic counterpart of the BI black... |
2006.06766 | Santiago Esteban Perez Bergliaffa | Santiago Esteban Perez Bergliaffa, Marcelo Chiapparini, and Luz Marina
Reyes | Thermodynamical and dynamical equilibrium of a self-gravitating
uncharged thin shell | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamical stability of massive thin shells with a given equation of state
(EOS) is here compared (both for the barotropic and non-barotropic case) with
the results coming from thermodynamical stability. Our results show that the
restrictions in the parameter space of equilibrium configurations of the shell
follow... | [
{
"created": "Thu, 11 Jun 2020 19:42:47 GMT",
"version": "v1"
}
] | 2020-06-15 | [
[
"Bergliaffa",
"Santiago Esteban Perez",
""
],
[
"Chiapparini",
"Marcelo",
""
],
[
"Reyes",
"Luz Marina",
""
]
] | The dynamical stability of massive thin shells with a given equation of state (EOS) is here compared (both for the barotropic and non-barotropic case) with the results coming from thermodynamical stability. Our results show that the restrictions in the parameter space of equilibrium configurations of the shell followin... |
1005.4790 | Y. Ben-Aryeh | Yacob Ben-Aryeh | Reduction of quantum noise and increase of amplification of
gravitational waves signals in Michelson interferometer by the use of
squeezed states | 6 pages | null | null | 7664 | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown in the present Letter that the quantum noise due to high laser
intensities in Michelson interferometer for gravitational waves detection can
be reduced by sending squeezed vacuum states to the 'dark' port of the
interferometer. The experimental details of such physical system have been
described in a rece... | [
{
"created": "Wed, 26 May 2010 11:18:20 GMT",
"version": "v1"
}
] | 2010-05-27 | [
[
"Ben-Aryeh",
"Yacob",
""
]
] | It is shown in the present Letter that the quantum noise due to high laser intensities in Michelson interferometer for gravitational waves detection can be reduced by sending squeezed vacuum states to the 'dark' port of the interferometer. The experimental details of such physical system have been described in a recent... |
1207.2726 | Yungui Gong | Yungui Gong | Cosmology in massive gravity | 4 pages, 1 figure,add more references | Commun. Theor. Phys. 59 (2013) 319-323 | 10.1088/0253-6102/59/3/13 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that more cosmological solutions in massive gravity can be obtained
if the metric tensor and the tensor $\Sigma_{\mu\nu}$ defined by
St\"{u}ckelberg fields take the homogeneous and isotropic form. The standard
cosmology with matter and radiation dominations in the past can be recovered
and $\Lambda$CDM model... | [
{
"created": "Wed, 11 Jul 2012 18:04:58 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Feb 2013 01:16:45 GMT",
"version": "v2"
}
] | 2015-06-05 | [
[
"Gong",
"Yungui",
""
]
] | We argue that more cosmological solutions in massive gravity can be obtained if the metric tensor and the tensor $\Sigma_{\mu\nu}$ defined by St\"{u}ckelberg fields take the homogeneous and isotropic form. The standard cosmology with matter and radiation dominations in the past can be recovered and $\Lambda$CDM model i... |
2108.12984 | Angel Rincon | Grigoris Panotopoulos, Angel Rincon and Il\'idio Lopes | Accretion of matter and spectra of Binary X-ray sources in Massive
Gravity | 7 pages, 4 figures, accepted for publication in Annals of Physics | null | 10.1016/j.aop.2021.168596 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study low-mass binary X-ray sources involving stellar mass black holes
within massive gravity. Regarding the accretion disk, we adopt the standard
model for an optically thick, cool, and geometrically thin disk by
Shakura-Sunyaev. For the gravitational field generated by the black hole, we
consider the analogue of... | [
{
"created": "Mon, 30 Aug 2021 03:59:09 GMT",
"version": "v1"
}
] | 2021-10-04 | [
[
"Panotopoulos",
"Grigoris",
""
],
[
"Rincon",
"Angel",
""
],
[
"Lopes",
"Ilídio",
""
]
] | We study low-mass binary X-ray sources involving stellar mass black holes within massive gravity. Regarding the accretion disk, we adopt the standard model for an optically thick, cool, and geometrically thin disk by Shakura-Sunyaev. For the gravitational field generated by the black hole, we consider the analogue of t... |
1810.05306 | Maria Okounkova | Maria Okounkova, Mark A. Scheel, Saul A. Teukolsky | Numerical black hole initial data and shadows in dynamical Chern-Simons
gravity | 31 pages, 8 figures Updated to match accepted version in Classical
and Quantum Gravity | null | 10.1088/1361-6382/aafcdf | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a scheme for generating first-order metric perturbation initial
data for an arbitrary background and source. We then apply this scheme to
derive metric perturbations in order-reduced dynamical Chern-Simons gravity
(dCS). In particular, we solve for metric perturbations on a black hole
background that are s... | [
{
"created": "Fri, 12 Oct 2018 01:31:19 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Jan 2019 22:09:23 GMT",
"version": "v2"
}
] | 2019-01-14 | [
[
"Okounkova",
"Maria",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Teukolsky",
"Saul A.",
""
]
] | We present a scheme for generating first-order metric perturbation initial data for an arbitrary background and source. We then apply this scheme to derive metric perturbations in order-reduced dynamical Chern-Simons gravity (dCS). In particular, we solve for metric perturbations on a black hole background that are sou... |
2402.16293 | Zhenyu Zhang | Jiewei Huang, Zhenyu Zhang, Minyong Guo, Bin Chen | Images and flares of geodesic hotspots around a Kerr black hole | Accepted by PRD. Minor revision. 29 pages, 11 figures, 3 tables | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | In this study, we develop a numerical method to generate images on an
observer's screen, formed by radiation from hotspots on any timelike orbits
outside a black hole. This method uses the calculation of fractional numbers,
enabling us not only to produce the overall image but also to distinguish
between primary, sec... | [
{
"created": "Mon, 26 Feb 2024 04:30:33 GMT",
"version": "v1"
},
{
"created": "Fri, 24 May 2024 07:03:59 GMT",
"version": "v2"
}
] | 2024-05-27 | [
[
"Huang",
"Jiewei",
""
],
[
"Zhang",
"Zhenyu",
""
],
[
"Guo",
"Minyong",
""
],
[
"Chen",
"Bin",
""
]
] | In this study, we develop a numerical method to generate images on an observer's screen, formed by radiation from hotspots on any timelike orbits outside a black hole. This method uses the calculation of fractional numbers, enabling us not only to produce the overall image but also to distinguish between primary, secon... |
2301.02967 | Tian-Yu Zhao | Zhixiang Ren, Tianyu Zhao, Zhoujian Cao, Zong-Kuan Guo, Wen-Biao Han,
Hong-Bo Jin, Yue-Liang Wu | Taiji Data Challenge for Exploring Gravitational Wave Universe | 15 pages, 3 figures | Front. Phys. 18, 64302 (2023) | 10.1007/s11467-023-1318-y | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The direct observation of gravitational waves (GWs) opens a new window for
exploring new physics from quanta to cosmos and provides a new tool for probing
the evolution of universe. GWs detection in space covers a broad spectrum
ranging over more than four orders of magnitude and enables us to study rich
physical and... | [
{
"created": "Sun, 8 Jan 2023 03:22:41 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Aug 2023 03:42:11 GMT",
"version": "v2"
}
] | 2023-08-17 | [
[
"Ren",
"Zhixiang",
""
],
[
"Zhao",
"Tianyu",
""
],
[
"Cao",
"Zhoujian",
""
],
[
"Guo",
"Zong-Kuan",
""
],
[
"Han",
"Wen-Biao",
""
],
[
"Jin",
"Hong-Bo",
""
],
[
"Wu",
"Yue-Liang",
""
]
] | The direct observation of gravitational waves (GWs) opens a new window for exploring new physics from quanta to cosmos and provides a new tool for probing the evolution of universe. GWs detection in space covers a broad spectrum ranging over more than four orders of magnitude and enables us to study rich physical and a... |
0711.0426 | Rituparno Goswami | Pankaj S. Joshi and Rituparno Goswami | On trapped surface formation in gravitational collapse II | null | null | 10.1088/0264-9381/24/11/009 | null | gr-qc astro-ph hep-th | null | Further to our consideration on trapped surfaces in gravitational collapse,
where pressures were allowed to be negative while satisfying weak energy
condition to avoid trapped surface formation, we discuss here several other
attempts of similar nature in this direction. Certain astrophysical aspects are
pointed out t... | [
{
"created": "Sat, 3 Nov 2007 05:02:42 GMT",
"version": "v1"
}
] | 2015-06-30 | [
[
"Joshi",
"Pankaj S.",
""
],
[
"Goswami",
"Rituparno",
""
]
] | Further to our consideration on trapped surfaces in gravitational collapse, where pressures were allowed to be negative while satisfying weak energy condition to avoid trapped surface formation, we discuss here several other attempts of similar nature in this direction. Certain astrophysical aspects are pointed out tow... |
1003.4280 | Salvatore Capozziello | S. Capozziello, S. Vignolo | The Cauchy problem for metric-affine f(R)-gravity in presence of a
Klein-Gordon scalar field | 6 pages | Int.J.Geom.Meth.Mod.Phys.8:167-176,2011 | 10.1142/S0219887811005063 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the initial value formulation of metric-affine f(R)-gravity in
presence of a Klein-Gordon scalar field acting as source of the field
equations. Sufficient conditions for the well-posedness of the Cauchy problem
are formulated. This result completes the analysis of the same problem already
considered for othe... | [
{
"created": "Mon, 22 Mar 2010 20:53:28 GMT",
"version": "v1"
}
] | 2011-03-28 | [
[
"Capozziello",
"S.",
""
],
[
"Vignolo",
"S.",
""
]
] | We study the initial value formulation of metric-affine f(R)-gravity in presence of a Klein-Gordon scalar field acting as source of the field equations. Sufficient conditions for the well-posedness of the Cauchy problem are formulated. This result completes the analysis of the same problem already considered for other ... |
gr-qc/9910040 | Janna Levin | Janna Levin | Gravity Waves, Chaos, and Spinning Compact Binaries | Final version published in PRL | Phys.Rev.Lett. 84 (2000) 3515 | 10.1103/PhysRevLett.84.3515 | DAMTP-1999-145 | gr-qc astro-ph chao-dyn nlin.CD | null | Spinning compact binaries are shown to be chaotic in the Post-Newtonian
expansion of the two body system. Chaos by definition is the extreme
sensitivity to initial conditions and a consequent inability to predict the
outcome of the evolution. As a result, the spinning pair will have
unpredictable gravitational wavefo... | [
{
"created": "Tue, 12 Oct 1999 10:51:37 GMT",
"version": "v1"
},
{
"created": "Sun, 14 Nov 1999 12:48:37 GMT",
"version": "v2"
},
{
"created": "Fri, 5 May 2000 13:19:37 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Levin",
"Janna",
""
]
] | Spinning compact binaries are shown to be chaotic in the Post-Newtonian expansion of the two body system. Chaos by definition is the extreme sensitivity to initial conditions and a consequent inability to predict the outcome of the evolution. As a result, the spinning pair will have unpredictable gravitational waveform... |
1006.0439 | Houwen Wu | Deyou Chen, Hui Wang, Houwen Wu, Haitang Yang | Hidden conformal symmetry of extreme and non-extreme
Einstein-Maxwell-Dilaton-Axion black holes | V3, typos corrected, version to appear in JHEP | JHEP 1011:002,2010 | 10.1007/JHEP11(2010)002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The hidden conformal symmetry of extreme and non-extreme
Einstein-Maxwell-Dilaton-Axion (EMDA) black holes is addressed in this paper.
For the non-extreme one, employing the wave equation of massless scalars, the
conformal symmetry with left temperature $T_{L}=\frac{M}{2\pi a}$ and right
temperature $T_{R}=\frac{\sqr... | [
{
"created": "Wed, 2 Jun 2010 16:32:39 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Aug 2010 19:05:32 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Oct 2010 16:09:59 GMT",
"version": "v3"
}
] | 2010-11-11 | [
[
"Chen",
"Deyou",
""
],
[
"Wang",
"Hui",
""
],
[
"Wu",
"Houwen",
""
],
[
"Yang",
"Haitang",
""
]
] | The hidden conformal symmetry of extreme and non-extreme Einstein-Maxwell-Dilaton-Axion (EMDA) black holes is addressed in this paper. For the non-extreme one, employing the wave equation of massless scalars, the conformal symmetry with left temperature $T_{L}=\frac{M}{2\pi a}$ and right temperature $T_{R}=\frac{\sqrt{... |
gr-qc/0406071 | Farid Ya. Khalili | F.Ya.Khalili | Reducing the mirrors coating noise in laser gravitational-wave antennae
by means of double mirrors | 7 pages, 3 eps figures | Phys.Lett. A334 (2005) 67-72 | 10.1016/j.physleta.2004.10.078 | null | gr-qc | null | Recent researches show that the fluctuations of the dielectric mirrors
coating thickness can introduce a substantial part of the future laser
gravitational-wave antennae total noise budget. These fluctuations are
especially large in the high-reflectivity end mirrors of the Fabry-Perot
cavities which are being used in... | [
{
"created": "Fri, 18 Jun 2004 08:44:19 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Jun 2004 11:26:19 GMT",
"version": "v2"
},
{
"created": "Fri, 1 Oct 2004 07:57:32 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Khalili",
"F. Ya.",
""
]
] | Recent researches show that the fluctuations of the dielectric mirrors coating thickness can introduce a substantial part of the future laser gravitational-wave antennae total noise budget. These fluctuations are especially large in the high-reflectivity end mirrors of the Fabry-Perot cavities which are being used in t... |
gr-qc/9907081 | Ilya Shapiro | J.A. Helayel-Neto, A. Penna-Firme and I. L. Shapiro | Conformal symmetry, anomaly and effective action for metric-scalar
gravity with torsion | 15 pages, LaTeX. Essentially extended version, in particular the
discussion of the stability of the conformal factor in gravity theory with
torsion and scalar added. Title also modified. To be published in Physics
Letters B | Phys.Lett. B479 (2000) 411-420 | 10.1016/S0370-2693(00)00342-7 | DF/UFJF-99/11 | gr-qc | null | We consider some aspects of conformal symmetry in a metric-scalar-torsion
system. It is shown that, for some special choice of the action, torsion acts
as a compensating field and the full theory is conformally equivalent to
General Relativity on classical level. Due to the introduction of torsion, this
equivalence c... | [
{
"created": "Mon, 26 Jul 1999 11:07:20 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Mar 2000 19:21:09 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Helayel-Neto",
"J. A.",
""
],
[
"Penna-Firme",
"A.",
""
],
[
"Shapiro",
"I. L.",
""
]
] | We consider some aspects of conformal symmetry in a metric-scalar-torsion system. It is shown that, for some special choice of the action, torsion acts as a compensating field and the full theory is conformally equivalent to General Relativity on classical level. Due to the introduction of torsion, this equivalence can... |
gr-qc/0201075 | Olga Sergeevna Khovanskaya | O.Khovanskaya (Sternberg Astronomical Institute, Moscow, Russia) | Dilatonic Black Holes Time Stability | LaTeX, 4 pages, uses gc-99.sty, submitted to Grav. & Cosmol | Grav.Cosmol. 8 (2002) 197-200 | null | null | gr-qc | null | The stability under small time perturbations of the dilatonic black hole
solution near the determinant curvature singularity is proved. This fact gives
the additional arguments that the investigated topological configuration can
realise in nature. In the frames of this model primordial black hole remnants
are examine... | [
{
"created": "Wed, 23 Jan 2002 09:29:36 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Khovanskaya",
"O.",
"",
"Sternberg Astronomical Institute, Moscow, Russia"
]
] | The stability under small time perturbations of the dilatonic black hole solution near the determinant curvature singularity is proved. This fact gives the additional arguments that the investigated topological configuration can realise in nature. In the frames of this model primordial black hole remnants are examined ... |
1211.2285 | Antonio C. Guti\'errez-Pi\~neres | Antonio C. Gutierrez-Pineres and Cesar S. Lopez-Monsalvo | A static axisymmetric exact solution of $f(R)$-gravity | To be published in Physics Letters B. Replaced with minor changes to
match published version | null | 10.1016/j.physletb.2012.12.014 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an exact, axially symmetric, static, vacuum solution for $f(R)$
gravity in Weyl's canonical coordinates. We obtain a general explicit
expression for the dependence of $df(R)/dR$ upon the $r$ and $z$ coordinates
and then the corresponding explicit form of $f(R)$, which must be consistent
with the field equa... | [
{
"created": "Sat, 10 Nov 2012 03:20:04 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Dec 2012 04:03:00 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Gutierrez-Pineres",
"Antonio C.",
""
],
[
"Lopez-Monsalvo",
"Cesar S.",
""
]
] | We present an exact, axially symmetric, static, vacuum solution for $f(R)$ gravity in Weyl's canonical coordinates. We obtain a general explicit expression for the dependence of $df(R)/dR$ upon the $r$ and $z$ coordinates and then the corresponding explicit form of $f(R)$, which must be consistent with the field equati... |
1104.0530 | Javad Taghizadeh firouzjaee | J. T. Firouzjaee, Reza Mansouri | Radiation from the LTB black hole | 9 pages, revised version, Europhysics Letter 2012 97 29002 | null | 10.1209/0295-5075/97/29002 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | Does a dynamical black hole embedded in a cosmological FRW background emit
Hawking radiation where a globally defined event horizon does not exist? What
are the differences to the Schwarzschild black hole? What about the first law
of black hole mechanics? We face these questions using the LTB cosmological
black hole ... | [
{
"created": "Mon, 4 Apr 2011 11:35:13 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Dec 2011 05:00:52 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Oct 2012 07:22:27 GMT",
"version": "v3"
}
] | 2015-05-27 | [
[
"Firouzjaee",
"J. T.",
""
],
[
"Mansouri",
"Reza",
""
]
] | Does a dynamical black hole embedded in a cosmological FRW background emit Hawking radiation where a globally defined event horizon does not exist? What are the differences to the Schwarzschild black hole? What about the first law of black hole mechanics? We face these questions using the LTB cosmological black hole mo... |
1301.5509 | Ion I. Cotaescu | Ion I. Cotaescu, Gabriel Pascu, Flavius Alin Dregoesc | On the rest and flat limits of the scalar modes on the de Sitter
spacetime | 9 pages no figures | null | 10.1142/S0217732313501605 | null | gr-qc hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The scalar mode functions on the spatially flat FLRW chart of the de Sitter
spacetime are redefined in order to obtain a natural frequencies separation in
the special local charts where the momentum vanishes, called here (natural)
rest frames. This can be done since in such frames the mode functions are
eigenfunction... | [
{
"created": "Wed, 23 Jan 2013 14:16:00 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Jan 2013 16:02:28 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Feb 2013 16:55:03 GMT",
"version": "v3"
}
] | 2015-06-12 | [
[
"Cotaescu",
"Ion I.",
""
],
[
"Pascu",
"Gabriel",
""
],
[
"Dregoesc",
"Flavius Alin",
""
]
] | The scalar mode functions on the spatially flat FLRW chart of the de Sitter spacetime are redefined in order to obtain a natural frequencies separation in the special local charts where the momentum vanishes, called here (natural) rest frames. This can be done since in such frames the mode functions are eigenfunctions ... |
1910.01023 | Manuel Hohmann | Kai Flathmann, Manuel Hohmann | Post-Newtonian limit of generalized scalar-torsion theories of gravity | LaTeX, 10 pages, no figures; corrected matter action; published
version, references updated. arXiv admin note: text overlap with
arXiv:1909.09355 | Phys. Rev. D 101, 024005 (2020) | 10.1103/PhysRevD.101.024005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we derive the post-Newtonian limit of a class of teleparallel
theories of gravity, where the action is a free function $L(T,X,Y,\phi)$ of the
Torsion scalar $T$ and scalar quantities $X$ and $Y$ built from the dynamical
scalar field $\phi$. We restrict the analysis to a massless scalar field in
order ... | [
{
"created": "Tue, 1 Oct 2019 07:25:31 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Oct 2019 06:37:05 GMT",
"version": "v2"
},
{
"created": "Wed, 22 Jan 2020 20:54:11 GMT",
"version": "v3"
}
] | 2020-01-27 | [
[
"Flathmann",
"Kai",
""
],
[
"Hohmann",
"Manuel",
""
]
] | In this article we derive the post-Newtonian limit of a class of teleparallel theories of gravity, where the action is a free function $L(T,X,Y,\phi)$ of the Torsion scalar $T$ and scalar quantities $X$ and $Y$ built from the dynamical scalar field $\phi$. We restrict the analysis to a massless scalar field in order to... |
1808.10562 | Fei-Quan Tu | Fei-Quan Tu, Yi-Xin Chen, Qi-Hong Huang | Thermodynamics in the universe described by the emergence of the space
and the energy balance relation | 9 pages, 2 figures | null | 10.3390/e21020167 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has previously been shown that it is more general to describe the
evolution of the universe based on the emergence of the space and the energy
balance relation. Here we investigate the thermodynamic properties of the
universe described by such a model. We show that the first law of
thermodynamics and the generaliz... | [
{
"created": "Fri, 31 Aug 2018 01:16:04 GMT",
"version": "v1"
}
] | 2019-03-27 | [
[
"Tu",
"Fei-Quan",
""
],
[
"Chen",
"Yi-Xin",
""
],
[
"Huang",
"Qi-Hong",
""
]
] | It has previously been shown that it is more general to describe the evolution of the universe based on the emergence of the space and the energy balance relation. Here we investigate the thermodynamic properties of the universe described by such a model. We show that the first law of thermodynamics and the generalized... |
2106.09416 | Tatyana P. Shestakova | T. P. Shestakova | On A. D. Sakharov's hypothesis of cosmological transitions with changes
in the signature of the metric | 13 pages, 1 figure, the extended version of the talk given at the 1st
Electronic Conference on Universe, the Satellite Workshop "Developing
A.D.Sakharov Legacy in Cosmoparticle Physics", 24 February 2021 | Universe 7 (2021) 151 | 10.3390/universe7050151 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I discuss possible consequences of A. D. Sakharov's hypothesis of
cosmological transitions with changes in the signature of the metric, based on
the path integral approach. This hypothesis raises a number of mathematical and
philosophical questions. Mathematical questions concern the definition of the
path integral t... | [
{
"created": "Thu, 17 Jun 2021 12:02:34 GMT",
"version": "v1"
}
] | 2021-06-18 | [
[
"Shestakova",
"T. P.",
""
]
] | I discuss possible consequences of A. D. Sakharov's hypothesis of cosmological transitions with changes in the signature of the metric, based on the path integral approach. This hypothesis raises a number of mathematical and philosophical questions. Mathematical questions concern the definition of the path integral to ... |
gr-qc/9602047 | Alessando Fabbri | R. Balbinot and A. Fabbri | Two-dimensional black holes in accelerated frames: Spacetime structure | 20 pages, harvmac, 12 figures, no changes, one reference added | Class.Quant.Grav. 13 (1996) 2457-2472 | 10.1088/0264-9381/13/9/011 | SISSA-ISAS/24/96/EP | gr-qc | null | Analytical extensions and resulting Penrose diagrams are given for the
solutions of a simple 2d dilaton gravity theory describing black holes which
are static as viewed by asymptotically accelerated observers.
| [
{
"created": "Fri, 23 Feb 1996 17:56:37 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Mar 1996 12:10:15 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Balbinot",
"R.",
""
],
[
"Fabbri",
"A.",
""
]
] | Analytical extensions and resulting Penrose diagrams are given for the solutions of a simple 2d dilaton gravity theory describing black holes which are static as viewed by asymptotically accelerated observers. |
gr-qc/9911068 | Fodor | Gyula Fodor and Zolt\'an Perj\'es | Petrov types of slowly rotating fluid balls | 14 pages, version to appear in Gen. Rel. Grav | Gen.Rel.Grav. 32 (2000) 2319-2332 | 10.1023/A:1001903726479 | null | gr-qc | null | Circularly rotating axisymmetric perfect fluid space-times are investigated
to second order in the small angular velocity. The conditions of various
special Petrov types are solved in a comoving tetrad formalism. A number of
theorems are stated on the possible Petrov types of various fluid models. It is
shown that Pe... | [
{
"created": "Thu, 18 Nov 1999 12:45:47 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Jun 2000 09:13:36 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Fodor",
"Gyula",
""
],
[
"Perjés",
"Zoltán",
""
]
] | Circularly rotating axisymmetric perfect fluid space-times are investigated to second order in the small angular velocity. The conditions of various special Petrov types are solved in a comoving tetrad formalism. A number of theorems are stated on the possible Petrov types of various fluid models. It is shown that Petr... |
1402.6708 | Wolfgang Wieland | Wolfgang M. Wieland | A one-dimensional action for simplicial gravity in three dimensions | 19 pages, two figures | Phys. Rev. D 90, 044008 (2014) | 10.1103/PhysRevD.90.044008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article presents a derivation of the Ponzano--Regge model from a
one-dimensional spinor action. The construction starts from the first-order
Palatini formalism in three dimensions. We then introduce a simplicial
decomposition of the three-dimensional manifold and study the discretised
action in the spinorial rep... | [
{
"created": "Wed, 26 Feb 2014 21:04:39 GMT",
"version": "v1"
}
] | 2014-08-08 | [
[
"Wieland",
"Wolfgang M.",
""
]
] | This article presents a derivation of the Ponzano--Regge model from a one-dimensional spinor action. The construction starts from the first-order Palatini formalism in three dimensions. We then introduce a simplicial decomposition of the three-dimensional manifold and study the discretised action in the spinorial repre... |
0707.0530 | Hideki Maeda | Hideki Maeda, Tomohiro Harada and B.J. Carr | Self-similar cosmological solutions with dark energy. II: black holes,
naked singularities and wormholes | 12 pages, 19 figures, 1 table, final version to appear in Physical
Review D | Phys.Rev.D77:024023,2008 | 10.1103/PhysRevD.77.024023 | CECS-PHY-07/16 | gr-qc astro-ph hep-th | null | We use a combination of numerical and analytical methods, exploiting the
equations derived in a preceding paper, to classify all spherically symmetric
self-similar solutions which are asymptotically Friedmann at large distances
and contain a perfect fluid with equation of state $p=(\gamma -1)\mu$ with
$0<\gamma<2/3$.... | [
{
"created": "Wed, 4 Jul 2007 02:42:46 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Oct 2007 02:02:37 GMT",
"version": "v2"
},
{
"created": "Wed, 2 Jan 2008 19:02:25 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Maeda",
"Hideki",
""
],
[
"Harada",
"Tomohiro",
""
],
[
"Carr",
"B. J.",
""
]
] | We use a combination of numerical and analytical methods, exploiting the equations derived in a preceding paper, to classify all spherically symmetric self-similar solutions which are asymptotically Friedmann at large distances and contain a perfect fluid with equation of state $p=(\gamma -1)\mu$ with $0<\gamma<2/3$. T... |
gr-qc/9806016 | Sergio Vitorino de Borba Goncalves | J.C. Fabris (1) and S.V.B. Goncalves (2) ((1) Departamento de Fisica,
Universidade Federal do Espirito Santo (2) Instituto de Fisica, Universidade
Federal Fluminense) | Gravitational waves in a stringlike fluid cosmology | Latex, 8 pages | null | 10.1046/j.1365-8711.1999.02554.x | DF/UFES-P002/98 | gr-qc | null | The coupling of a stringlike fluid with ordinary matter and gravity may lead
to a closed Universe with the dynamic of an open one. This can provide an
alternative solution for the age and horizon problems. A study of density
perturbations of the stringlike fluid indicates the existence of instabilities
in the small w... | [
{
"created": "Wed, 3 Jun 1998 18:58:23 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Fabris",
"J. C.",
""
],
[
"Goncalves",
"S. V. B.",
""
]
] | The coupling of a stringlike fluid with ordinary matter and gravity may lead to a closed Universe with the dynamic of an open one. This can provide an alternative solution for the age and horizon problems. A study of density perturbations of the stringlike fluid indicates the existence of instabilities in the small wav... |
2212.05570 | Bernard Raffaelli | Jos\'e Luis Jaramillo, Rodrigo P. Macedo, Oscar Meneses-Rojas, Bernard
Raffaelli and Lamis Al Sheikh | A Weyl's law for black holes | 12 pages, 4 figures, preliminary version | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We discuss a Weyl's law for the quasi-normal modes of black holes that
recovers the structural features of the standard Weyl's law for the eigenvalues
of the Laplacian in compact regions. Specifically, the asymptotics of the
counting function $N(\omega)$ of quasi-normal modes of $(d+1)$-dimensional
black holes follow... | [
{
"created": "Sun, 11 Dec 2022 18:23:27 GMT",
"version": "v1"
}
] | 2022-12-13 | [
[
"Jaramillo",
"José Luis",
""
],
[
"Macedo",
"Rodrigo P.",
""
],
[
"Meneses-Rojas",
"Oscar",
""
],
[
"Raffaelli",
"Bernard",
""
],
[
"Sheikh",
"Lamis Al",
""
]
] | We discuss a Weyl's law for the quasi-normal modes of black holes that recovers the structural features of the standard Weyl's law for the eigenvalues of the Laplacian in compact regions. Specifically, the asymptotics of the counting function $N(\omega)$ of quasi-normal modes of $(d+1)$-dimensional black holes follows ... |
1611.06214 | Jonathan Thompson | Jonathan E. Thompson, Hector Chen, Bernard F. Whiting | Gauge Invariant Perturbations of the Schwarzschild Spacetime | null | null | 10.1088/1361-6382/aa7f5b | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Beginning with the pioneering work of Regge and Wheeler (Phys. Rev. 108,
1957), there have been many studies of perturbations away from the
Schwarzschild spacetime background. In particular several authors (e.g.
Moncrief, Ann. Phys 88, 1974) have investigated gauge invariant quantities of
the Regge-Wheeler (RW) gauge... | [
{
"created": "Fri, 18 Nov 2016 20:08:13 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Nov 2016 14:44:31 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Jul 2017 16:28:47 GMT",
"version": "v3"
}
] | 2017-08-16 | [
[
"Thompson",
"Jonathan E.",
""
],
[
"Chen",
"Hector",
""
],
[
"Whiting",
"Bernard F.",
""
]
] | Beginning with the pioneering work of Regge and Wheeler (Phys. Rev. 108, 1957), there have been many studies of perturbations away from the Schwarzschild spacetime background. In particular several authors (e.g. Moncrief, Ann. Phys 88, 1974) have investigated gauge invariant quantities of the Regge-Wheeler (RW) gauge. ... |
1909.13117 | Martin Zouhar | Ale\v{s} Pat\'ak, Martin Zouhar, Tom\'a\v{s} \v{R}ih\'a\v{c}ek, Oto
Brzobohat\'y, Jan Ger\v{s}l, Anna Charv\'atov\'a Campbell | Visualizing gravitational Bessel waves | Published in PRD, final full-text available at the following link:
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.100.044050 | Phys. Rev. D 100, 044050 (2019) | 10.1103/PhysRevD.100.044050 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explicitly derive a~vortex inspired solution for the metric perturbation
within the linearized Einsteins general theory of relativity in arbitrary
dimensions $D\geq 4$. We focus on $D=4$ where our solution is the gravitational
analog of the well-known electromagnetic (or electron) Bessel vortex beams.
Next we visu... | [
{
"created": "Sat, 28 Sep 2019 16:12:17 GMT",
"version": "v1"
}
] | 2019-10-01 | [
[
"Paták",
"Aleš",
""
],
[
"Zouhar",
"Martin",
""
],
[
"Řiháček",
"Tomáš",
""
],
[
"Brzobohatý",
"Oto",
""
],
[
"Geršl",
"Jan",
""
],
[
"Campbell",
"Anna Charvátová",
""
]
] | We explicitly derive a~vortex inspired solution for the metric perturbation within the linearized Einsteins general theory of relativity in arbitrary dimensions $D\geq 4$. We focus on $D=4$ where our solution is the gravitational analog of the well-known electromagnetic (or electron) Bessel vortex beams. Next we visual... |
2001.02698 | Jorge Pullin | Rodolfo Gambini, Esteban Mato, Jorge Pullin | Axisymmetric gravity in real Ashtekar variables: the quantum theory | 21 pages, 4 figures | null | 10.1088/1361-6382/ab7966 | LSU-REL-010820 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a previous paper we formulated axisymmetric general relativity in terms of
real Ashtekar--Barbero variables. Here we proceed to quantize the theory. We
are able to implement Thiemann's version of the Hamiltonian constraint. We
discuss its action including the matrix elements and its solutions. This
provides a 2+1 ... | [
{
"created": "Wed, 8 Jan 2020 19:01:06 GMT",
"version": "v1"
}
] | 2020-06-17 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Mato",
"Esteban",
""
],
[
"Pullin",
"Jorge",
""
]
] | In a previous paper we formulated axisymmetric general relativity in terms of real Ashtekar--Barbero variables. Here we proceed to quantize the theory. We are able to implement Thiemann's version of the Hamiltonian constraint. We discuss its action including the matrix elements and its solutions. This provides a 2+1 di... |
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