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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0708.3033 | Eric Poisson | Adam Pound and Eric Poisson | Osculating orbits in Schwarzschild spacetime, with an application to
extreme mass-ratio inspirals | 18 pages, 6 figures, final version to be published in Physical Review
D | Phys.Rev.D77:044013,2008 | 10.1103/PhysRevD.77.044013 | null | gr-qc | null | We present a method to integrate the equations of motion that govern bound,
accelerated orbits in Schwarzschild spacetime. At each instant the true
worldline is assumed to lie tangent to a reference geodesic, called an
osculating orbit, such that the worldline evolves smoothly from one such
geodesic to the next. Beca... | [
{
"created": "Wed, 22 Aug 2007 15:11:22 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Dec 2007 20:45:26 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Pound",
"Adam",
""
],
[
"Poisson",
"Eric",
""
]
] | We present a method to integrate the equations of motion that govern bound, accelerated orbits in Schwarzschild spacetime. At each instant the true worldline is assumed to lie tangent to a reference geodesic, called an osculating orbit, such that the worldline evolves smoothly from one such geodesic to the next. Becaus... |
2104.06376 | Gabriele Bozzola | Gabriele Bozzola | kuibit: Analyzing Einstein Toolkit simulations with Python | Published in JOSS, code homepage: https://sbozzolo.github.io/kuibit/ | Journal of Open Source Software 6(60), 3099, 2021 | 10.21105/joss.03099 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | In the era of gravitational-wave astronomy, general-relativistic simulations
of compact objects play a role of paramount importance. These calculations can
be performed with the Einstein Toolkit, an open-source and community-supported
software for numerical-relativity and relativistic astrophysics. The code comes
wit... | [
{
"created": "Tue, 13 Apr 2021 17:30:29 GMT",
"version": "v1"
}
] | 2021-04-20 | [
[
"Bozzola",
"Gabriele",
""
]
] | In the era of gravitational-wave astronomy, general-relativistic simulations of compact objects play a role of paramount importance. These calculations can be performed with the Einstein Toolkit, an open-source and community-supported software for numerical-relativity and relativistic astrophysics. The code comes with ... |
0904.3155 | Anatoly Svidzinsky | Anatoly A. Svidzinsky | Vector theory of gravity in Minkowski space-time: flat Universe without
black holes | 12 pages | null | null | null | gr-qc astro-ph.CO astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new classical theory of gravity which is based on the principle
of equivalence and assumption that gravity, similarly to electrodynamics, is
described by a vector field in Minkowski space-time. We show that such
assumptions yield a unique theory of gravity; it passes all available tests and
free of singu... | [
{
"created": "Tue, 21 Apr 2009 01:49:40 GMT",
"version": "v1"
}
] | 2009-04-22 | [
[
"Svidzinsky",
"Anatoly A.",
""
]
] | We propose a new classical theory of gravity which is based on the principle of equivalence and assumption that gravity, similarly to electrodynamics, is described by a vector field in Minkowski space-time. We show that such assumptions yield a unique theory of gravity; it passes all available tests and free of singula... |
1502.05674 | Antonios Tsokaros A. | Antonios Tsokaros, Koji Uryu, Luciano Rezzolla | New code for quasiequilibrium initial data of binary neutron stars:
Corotating, irrotational and slowly spinning systems | Final version | Phys. Rev. D 91, 104030 (2015) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the extension of our \cocal~- Compact Object CALculator - code to
compute general-relativistic initial data for binary compact-star systems. In
particular, we construct quasiequilibrium initial data for equal-mass binaries
with spins that are either aligned or antialigned with the orbital angular
momentum.... | [
{
"created": "Thu, 19 Feb 2015 19:28:46 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jun 2015 15:00:52 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Tsokaros",
"Antonios",
""
],
[
"Uryu",
"Koji",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | We present the extension of our \cocal~- Compact Object CALculator - code to compute general-relativistic initial data for binary compact-star systems. In particular, we construct quasiequilibrium initial data for equal-mass binaries with spins that are either aligned or antialigned with the orbital angular momentum. T... |
gr-qc/0609048 | Alexey Toporensky | A. Toporensky | Transient chaos in scalar field cosmology on a brane | 10 pages, no figures; references added | Grav.Cosmol.13:123-126,2007 | null | null | gr-qc nlin.CD | null | We study cosmological dynamics of a flat Randall-Sundrum brane with a scalar
field and a negative "dark radiation" term. It is shown that in some situations
the "dark radiation" can mimic spatial curvature and cause a chaotic behavior
which is similar to chaotic dynamics in closed Universe with a scalar field.
| [
{
"created": "Thu, 14 Sep 2006 10:30:19 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Oct 2006 18:44:47 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Toporensky",
"A.",
""
]
] | We study cosmological dynamics of a flat Randall-Sundrum brane with a scalar field and a negative "dark radiation" term. It is shown that in some situations the "dark radiation" can mimic spatial curvature and cause a chaotic behavior which is similar to chaotic dynamics in closed Universe with a scalar field. |
1107.4653 | Dong-han Yeom | Dong-il Hwang, Hanno Sahlmann, Dong-han Yeom | The no-boundary measure in scalar-tensor gravity | 31 pages, 9 figures | Class.Quant.Grav.29:095005,2012 | 10.1088/0264-9381/29/9/095005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we study the no-boundary wave function in scalar-tensor
gravity with various potentials for the non-minimally coupled scalar field. Our
goal is to calculate probabilities for the scalar field - and hence the
effective gravitational coupling and cosmological constant - to take specific
values. Most ca... | [
{
"created": "Sat, 23 Jul 2011 03:52:01 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Apr 2012 03:11:34 GMT",
"version": "v2"
}
] | 2015-05-28 | [
[
"Hwang",
"Dong-il",
""
],
[
"Sahlmann",
"Hanno",
""
],
[
"Yeom",
"Dong-han",
""
]
] | In this article, we study the no-boundary wave function in scalar-tensor gravity with various potentials for the non-minimally coupled scalar field. Our goal is to calculate probabilities for the scalar field - and hence the effective gravitational coupling and cosmological constant - to take specific values. Most calc... |
1511.07368 | Axel de la Macorra | Leonardo Quintanar G. and Axel de la Macorra | Cosmology and Quantum Field Theory II: Study of an extended
Nambu-Jona-Lasinio model with a Dynamical Coupling | 21 pages, 14 figures | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the cosmological implications of the Nambu-Jona-Lasinio (NJL model)
when the coupling constant is field dependent. The NJL model has a four-fermion
interaction describing two different phases due to quantum interaction effects
and determined by the strength of the coupling constant g. It describes
massless f... | [
{
"created": "Mon, 23 Nov 2015 19:08:45 GMT",
"version": "v1"
}
] | 2015-11-24 | [
[
"G.",
"Leonardo Quintanar",
""
],
[
"de la Macorra",
"Axel",
""
]
] | We study the cosmological implications of the Nambu-Jona-Lasinio (NJL model) when the coupling constant is field dependent. The NJL model has a four-fermion interaction describing two different phases due to quantum interaction effects and determined by the strength of the coupling constant g. It describes massless fer... |
0802.3791 | Oliver Rinne | Oliver Rinne | Constrained evolution in axisymmetry and the gravitational collapse of
prolate Brill waves | 22 pages, 8 figures. More material on convergence tests. This version
accepted for publication in Class. Quantum Grav | Class.Quant.Grav.25:135009,2008 | 10.1088/0264-9381/25/13/135009 | DAMTP-2008-14 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is concerned with the Einstein equations in axisymmetric vacuum
spacetimes. We consider numerical evolution schemes that solve the constraint
equations as well as elliptic gauge conditions at each time step. We examine
two such schemes that have been proposed in the literature and show that some
of their e... | [
{
"created": "Tue, 26 Feb 2008 11:38:29 GMT",
"version": "v1"
},
{
"created": "Thu, 29 May 2008 15:05:34 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Rinne",
"Oliver",
""
]
] | This paper is concerned with the Einstein equations in axisymmetric vacuum spacetimes. We consider numerical evolution schemes that solve the constraint equations as well as elliptic gauge conditions at each time step. We examine two such schemes that have been proposed in the literature and show that some of their ell... |
1405.6935 | Orlando Luongo | Alejandro Aviles, Alessandro Bravetti, Salvatore Capozziello, Orlando
Luongo | Precision cosmology with Pad\'e rational approximations: theoretical
predictions versus observational limits | 24 pages, 9 figures | Phys. Rev. D, 90, 043531, (2014) | 10.1103/PhysRevD.90.043531 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a novel approach for parameterizing the luminosity distance, based
on the use of rational "Pad\'e" approximations. This new technique extends
standard Taylor treatments, overcoming possible convergence issues at high
redshifts plaguing standard cosmography. Indeed, we show that Pad\'e expansions
enable us ... | [
{
"created": "Tue, 27 May 2014 14:42:24 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Oct 2014 07:08:51 GMT",
"version": "v2"
}
] | 2015-06-19 | [
[
"Aviles",
"Alejandro",
""
],
[
"Bravetti",
"Alessandro",
""
],
[
"Capozziello",
"Salvatore",
""
],
[
"Luongo",
"Orlando",
""
]
] | We propose a novel approach for parameterizing the luminosity distance, based on the use of rational "Pad\'e" approximations. This new technique extends standard Taylor treatments, overcoming possible convergence issues at high redshifts plaguing standard cosmography. Indeed, we show that Pad\'e expansions enable us to... |
2005.09430 | Muhammad Sharif | M. Sharif and Zunaira Akhtar | Quasi-normal Modes and Thermal Fluctuations of Charged Black Hole with
Weyl Corrections | 28 pages, 17 figures, to appear in PDU | Phys. Dark Universe 29(2020)100589 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study thermodynamics, quasi-normal modes and thermal
fluctuations of a charged black hole with Weyl corrections. We first obtain
thermodynamic quantities such as Hawking temperature, entropy, and heat
capacity for non-rotating as well as rotating versions of this black hole. We
also evaluate tempera... | [
{
"created": "Tue, 12 May 2020 09:28:29 GMT",
"version": "v1"
}
] | 2020-05-22 | [
[
"Sharif",
"M.",
""
],
[
"Akhtar",
"Zunaira",
""
]
] | In this paper, we study thermodynamics, quasi-normal modes and thermal fluctuations of a charged black hole with Weyl corrections. We first obtain thermodynamic quantities such as Hawking temperature, entropy, and heat capacity for non-rotating as well as rotating versions of this black hole. We also evaluate temperatu... |
2005.02366 | Scott Melville | Tanguy Grall and Scott Melville | Inflation in Motion: Unitarity Constraints in Effective Field Theories
with Broken Lorentz Symmetry | 41 pages plus Appendices, 7 figures (replaced to match journal
version. [55] refers to 2102.05683) | JCAP 09 (2020) 017 | 10.1088/1475-7516/2020/09/017 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | During inflation, there is a preferred reference frame in which the expansion
of the background spacetime is spatially isotropic. In contrast to Minkowski
spacetime, observables can depend on the velocity of the system with respect to
this cosmic rest frame. We derive new constraints from radiative stability and
unit... | [
{
"created": "Tue, 5 May 2020 17:51:41 GMT",
"version": "v1"
},
{
"created": "Sun, 14 Feb 2021 13:34:17 GMT",
"version": "v2"
}
] | 2021-02-16 | [
[
"Grall",
"Tanguy",
""
],
[
"Melville",
"Scott",
""
]
] | During inflation, there is a preferred reference frame in which the expansion of the background spacetime is spatially isotropic. In contrast to Minkowski spacetime, observables can depend on the velocity of the system with respect to this cosmic rest frame. We derive new constraints from radiative stability and unitar... |
1908.07799 | Sanjar Shaymatov | Sanjar Shaymatov, Naresh Dadhich, Bobomurat Ahmedov | Six-dimensional Myers-Perry rotating black hole cannot be overspun | 10 pages, no figures, 1 Table | Phys. Rev. D 101, 044028 (2020) | 10.1103/PhysRevD.101.044028 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Though under nonlinear accretion, all black holes in four and higher
dimensions obey the weak cosmic censorship conjecture (CCC); however, they
generally violate it for linear test particle accretion with the exception of
five-dimensional rotating black hole with a single rotation. In dimensions
greater than five, th... | [
{
"created": "Wed, 21 Aug 2019 11:15:33 GMT",
"version": "v1"
},
{
"created": "Sun, 23 Feb 2020 19:23:15 GMT",
"version": "v2"
}
] | 2020-02-26 | [
[
"Shaymatov",
"Sanjar",
""
],
[
"Dadhich",
"Naresh",
""
],
[
"Ahmedov",
"Bobomurat",
""
]
] | Though under nonlinear accretion, all black holes in four and higher dimensions obey the weak cosmic censorship conjecture (CCC); however, they generally violate it for linear test particle accretion with the exception of five-dimensional rotating black hole with a single rotation. In dimensions greater than five, ther... |
1310.5339 | Hernando Quevedo | Hernando Quevedo, Saken Toktarbay and Aimuratov Yerlan | Quadrupolar gravitational fields described by the $q-$metric | null | Version published in International Journal of Mathematics and
Physics 3 (2012) 133 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the Zipoy-Voorhees metric ($q-$metric) as the simplest static,
axially symmetric solution of Einstein's vacuum field equations that possesses
as independent parameters the mass and the quadrupole moment. In accordance
with the black holes uniqueness theorems, the presence of the quadrupole
completely c... | [
{
"created": "Sun, 20 Oct 2013 15:21:21 GMT",
"version": "v1"
}
] | 2013-10-22 | [
[
"Quevedo",
"Hernando",
""
],
[
"Toktarbay",
"Saken",
""
],
[
"Yerlan",
"Aimuratov",
""
]
] | We investigate the Zipoy-Voorhees metric ($q-$metric) as the simplest static, axially symmetric solution of Einstein's vacuum field equations that possesses as independent parameters the mass and the quadrupole moment. In accordance with the black holes uniqueness theorems, the presence of the quadrupole completely cha... |
1410.7775 | Andy Bohn | Andy Bohn, William Throwe, Fran\c{c}ois H\'ebert, Katherine
Henriksson, Darius Bunandar, Nicholas W. Taylor, Mark A. Scheel | What does a binary black hole merger look like? | 10 pages, 12 figures. Supplementary images and movies can be found at
http://www.black-holes.org/the-science-numerical-relativity/numerical-relativity/gravitational-lensing | Class. Quantum Grav. 32, 065002 (2015) | 10.1088/0264-9381/32/6/065002 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a method of calculating the strong-field gravitational lensing
caused by many analytic and numerical spacetimes. We use this procedure to
calculate the distortion caused by isolated black holes and by numerically
evolved black hole binaries. We produce both demonstrative images illustrating
details of the ... | [
{
"created": "Tue, 28 Oct 2014 20:00:04 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Nov 2014 18:09:03 GMT",
"version": "v2"
},
{
"created": "Wed, 22 Apr 2015 11:17:24 GMT",
"version": "v3"
}
] | 2015-04-23 | [
[
"Bohn",
"Andy",
""
],
[
"Throwe",
"William",
""
],
[
"Hébert",
"François",
""
],
[
"Henriksson",
"Katherine",
""
],
[
"Bunandar",
"Darius",
""
],
[
"Taylor",
"Nicholas W.",
""
],
[
"Scheel",
"Mark A.",
""
... | We present a method of calculating the strong-field gravitational lensing caused by many analytic and numerical spacetimes. We use this procedure to calculate the distortion caused by isolated black holes and by numerically evolved black hole binaries. We produce both demonstrative images illustrating details of the sp... |
1012.4423 | Pablo Galaviz | Pablo Galaviz and Bernd Bruegmann | Characterization of the gravitational wave emission of three black holes | 17 pages, 18 figures and 5 tables. Published version | Phys.Rev.D83:084013,2011 | 10.1103/PhysRevD.83.084013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the gravitational wave emission of three compact objects using
post-Newtonian (PN) equations of motion derived from the Arnowitt-Deser-Misner
Hamiltonian formulation, where we include (for the first time in this context)
terms up to 2.5 PN order. We perform numerical simulations of a hierarchical
configurati... | [
{
"created": "Mon, 20 Dec 2010 18:16:08 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Aug 2011 03:48:19 GMT",
"version": "v2"
}
] | 2011-08-24 | [
[
"Galaviz",
"Pablo",
""
],
[
"Bruegmann",
"Bernd",
""
]
] | We study the gravitational wave emission of three compact objects using post-Newtonian (PN) equations of motion derived from the Arnowitt-Deser-Misner Hamiltonian formulation, where we include (for the first time in this context) terms up to 2.5 PN order. We perform numerical simulations of a hierarchical configuration... |
1907.05782 | Sebastian Bramberger | Sebastian F. Bramberger, Alice Di Tucci, Jean-Luc Lehners | Homogeneous Transitions during Inflation: a Description in Quantum
Cosmology | 39 pages, 19 figures | Phys. Rev. D 101, 063501 (2020) | 10.1103/PhysRevD.101.063501 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The usual description of inflationary fluctuations uses the framework of
quantum field theory (QFT) in curved spacetime, in which quantum fluctuations
are superimposed on a classical background spacetime. Even for large
fluctuations, such as those envisioned during a regime of eternal inflation,
this framework is fre... | [
{
"created": "Fri, 12 Jul 2019 15:08:49 GMT",
"version": "v1"
}
] | 2020-03-11 | [
[
"Bramberger",
"Sebastian F.",
""
],
[
"Di Tucci",
"Alice",
""
],
[
"Lehners",
"Jean-Luc",
""
]
] | The usual description of inflationary fluctuations uses the framework of quantum field theory (QFT) in curved spacetime, in which quantum fluctuations are superimposed on a classical background spacetime. Even for large fluctuations, such as those envisioned during a regime of eternal inflation, this framework is frequ... |
gr-qc/9904059 | Pablo Laguna | Nils Andersson, Kostas D. Kokkotas, Pablo Laguna, Philippos
Papadopoulos and Michael S. Sipior | Construction of Astrophysical Initial Data for Perturbations of
Relativistic Stars | 14 pages, 2 figures | Phys. Rev. D 60, 124004 (1999) | 10.1103/PhysRevD.60.124004 | null | gr-qc astro-ph | null | We develop a framework for constructing initial data sets for perturbations
about spherically symmetric matter distributions. This framework facilitates
setting initial data representing astrophysical sources of gravitational
radiation involving relativistic stars. The procedure is based on
Lichnerowicz-York's confor... | [
{
"created": "Fri, 23 Apr 1999 14:54:55 GMT",
"version": "v1"
}
] | 2016-08-25 | [
[
"Andersson",
"Nils",
""
],
[
"Kokkotas",
"Kostas D.",
""
],
[
"Laguna",
"Pablo",
""
],
[
"Papadopoulos",
"Philippos",
""
],
[
"Sipior",
"Michael S.",
""
]
] | We develop a framework for constructing initial data sets for perturbations about spherically symmetric matter distributions. This framework facilitates setting initial data representing astrophysical sources of gravitational radiation involving relativistic stars. The procedure is based on Lichnerowicz-York's conforma... |
gr-qc/9709013 | Jose Pizarro de Sande Lemos | Jose' P. S. Lemos | Gravitational collapse to toroidal, cylindrical and planar black holes | 6 pages, Revtex, modifications in the title and in the interpretation
of some results, to appear in Physical Review D | Phys.Rev. D57 (1998) 4600-4605 | 10.1103/PhysRevD.57.4600 | null | gr-qc astro-ph hep-th | null | Gravitational collapse of non-spherical symmetric matter leads inevitably to
non-static external spacetimes. It is shown here that gravitational collapse of
matter with toroidal topology in a toroidal anti-de Sitter background proceeds
to form a toroidal black hole. According to the analytical model presented, the
co... | [
{
"created": "Thu, 4 Sep 1997 19:10:41 GMT",
"version": "v1"
},
{
"created": "Sat, 27 Dec 1997 20:58:18 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Lemos",
"Jose' P. S.",
""
]
] | Gravitational collapse of non-spherical symmetric matter leads inevitably to non-static external spacetimes. It is shown here that gravitational collapse of matter with toroidal topology in a toroidal anti-de Sitter background proceeds to form a toroidal black hole. According to the analytical model presented, the coll... |
1901.02635 | Boris Kruglikov | Boris Kruglikov, David McNutt, Eivind Schneider | Differential invariants of Kundt waves | null | null | 10.1088/1361-6382/ab28c5 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Kundt waves belong to the class of spacetimes which are not distinguished by
their scalar curvature invariants. We address the equivalence problem for the
metrics in this class via scalar differential invariants with respect to the
equivalence pseudo-group of the problem. We compute and finitely represent the
algebra... | [
{
"created": "Wed, 9 Jan 2019 08:25:32 GMT",
"version": "v1"
}
] | 2019-07-31 | [
[
"Kruglikov",
"Boris",
""
],
[
"McNutt",
"David",
""
],
[
"Schneider",
"Eivind",
""
]
] | Kundt waves belong to the class of spacetimes which are not distinguished by their scalar curvature invariants. We address the equivalence problem for the metrics in this class via scalar differential invariants with respect to the equivalence pseudo-group of the problem. We compute and finitely represent the algebra o... |
gr-qc/0605044 | Stratos Boutloukos | Stratos Boutloukos and Hans-Peter Nollert | Eigenmode frequency distribution of rapidly rotating neutron stars | 10 pages, 6 figures, added references, improved wording, published in
Physical Review D | Phys.Rev.D75:043007,2007 | 10.1103/PhysRevD.75.043007 | null | gr-qc astro-ph | null | We use perturbation theory and the relativistic Cowling approximation to
numerically compute characteristic oscillation modes of rapidly rotating
relativistic stars which consist of a perfect fluid obeying a polytropic
equation of state. We present a code that allows the computation of modes of
arbitrary order. We fo... | [
{
"created": "Mon, 8 May 2006 18:54:10 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Mar 2007 19:59:51 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Boutloukos",
"Stratos",
""
],
[
"Nollert",
"Hans-Peter",
""
]
] | We use perturbation theory and the relativistic Cowling approximation to numerically compute characteristic oscillation modes of rapidly rotating relativistic stars which consist of a perfect fluid obeying a polytropic equation of state. We present a code that allows the computation of modes of arbitrary order. We focu... |
2302.08537 | Juan Garcia-Bellido | Juan Garcia-Bellido | The effect of GREA on the gravitational collapse of neutron stars | 5 pages, 2 figures | null | null | IFT-UAM/CSIC-23-16 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | General Relativistic Entropic Acceleration (GREA) gives a general framework
in which to study multiple out-of-equilibrium phenomena in the context of
general relativity, like the late accelerated expansion of the universe or the
formation of galaxies and the large scale structure of the universe. Here we
analyze the ... | [
{
"created": "Thu, 16 Feb 2023 19:18:13 GMT",
"version": "v1"
}
] | 2023-02-20 | [
[
"Garcia-Bellido",
"Juan",
""
]
] | General Relativistic Entropic Acceleration (GREA) gives a general framework in which to study multiple out-of-equilibrium phenomena in the context of general relativity, like the late accelerated expansion of the universe or the formation of galaxies and the large scale structure of the universe. Here we analyze the co... |
2407.01727 | Leonardo Chataignier | Claus Kiefer, Leonardo Chataignier, Mritunjay Tyagi | Time and its arrow from quantum geometrodynamics? | Contribution to the XIX Symmetries in Science Symposium 2023 | null | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss how quantum geometrodynamics, a conservative approach to quantum
gravity, might explain the emergence of classical spacetime and, with it, the
emergence of classical time and its arrow from the universal quantum state.
This follows from a particular but reasonable choice of boundary condition
motivated by ... | [
{
"created": "Mon, 1 Jul 2024 19:00:53 GMT",
"version": "v1"
}
] | 2024-07-03 | [
[
"Kiefer",
"Claus",
""
],
[
"Chataignier",
"Leonardo",
""
],
[
"Tyagi",
"Mritunjay",
""
]
] | We discuss how quantum geometrodynamics, a conservative approach to quantum gravity, might explain the emergence of classical spacetime and, with it, the emergence of classical time and its arrow from the universal quantum state. This follows from a particular but reasonable choice of boundary condition motivated by th... |
1509.08536 | Oldrich Semerak | Old\v{r}ich Semer\'ak, Petra Sukov\'a | On geodesic dynamics in deformed black-hole fields | 32 pages, 9 figures | null | 10.1007/978-3-319-18335-0_17 | null | gr-qc astro-ph.HE nlin.CD | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | "Almost all" seems to be known about isolated stationary black holes in
asymptotically flat space-times and about the behaviour of {\em test} matter
and fields in their backgrounds. The black holes likely present in galactic
nuclei and in some X-ray binaries are commonly being represented by the Kerr
metric, but actu... | [
{
"created": "Mon, 28 Sep 2015 23:14:28 GMT",
"version": "v1"
}
] | 2021-04-07 | [
[
"Semerák",
"Oldřich",
""
],
[
"Suková",
"Petra",
""
]
] | "Almost all" seems to be known about isolated stationary black holes in asymptotically flat space-times and about the behaviour of {\em test} matter and fields in their backgrounds. The black holes likely present in galactic nuclei and in some X-ray binaries are commonly being represented by the Kerr metric, but actual... |
2312.12947 | J. Fernando Barbero G. | J. Fernando Barbero G., Marc Basquens, Eduardo J. S. Villase\~nor | Euclidean self-dual gravity: Ashtekar variables without gauge fixing | 29 pages, no figures | Physical Review D, 109 (2024) 064047 | 10.1103/PhysRevD.109.064047 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The Gotay-Nester-Hinds method is used in this paper to study the Hamiltonian
formulation of the Euclidean self-dual action. This action can be used to
arrive at the complex Ashtekar formulation of General Relativity or a real
connection formulation for Euclidean General Relativity. The main result of the
paper is a d... | [
{
"created": "Wed, 20 Dec 2023 11:45:55 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Mar 2024 11:58:15 GMT",
"version": "v2"
},
{
"created": "Wed, 29 May 2024 08:58:02 GMT",
"version": "v3"
}
] | 2024-05-30 | [
[
"G.",
"J. Fernando Barbero",
""
],
[
"Basquens",
"Marc",
""
],
[
"Villaseñor",
"Eduardo J. S.",
""
]
] | The Gotay-Nester-Hinds method is used in this paper to study the Hamiltonian formulation of the Euclidean self-dual action. This action can be used to arrive at the complex Ashtekar formulation of General Relativity or a real connection formulation for Euclidean General Relativity. The main result of the paper is a der... |
1703.01103 | Hyeong-Chan Kim | Inyong Cho and Hyeong-Chan Kim | Simple Black Holes with Anisotropic Fluid | 9 pages, 1 figures, to appear in Chinese Physics C | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a spherically symmetric spacetime made of anisotropic fluid of which
radial equation of state is given by $p_1 = -\rho$. This provides analytic
solutions and a good opportunity to study the static configuration of black
hole plus matter. For a given equation-of-state parameter $w_2 = p_2/\rho$ for
angular di... | [
{
"created": "Fri, 3 Mar 2017 10:39:02 GMT",
"version": "v1"
},
{
"created": "Tue, 8 May 2018 05:22:24 GMT",
"version": "v2"
},
{
"created": "Sat, 22 Dec 2018 14:23:56 GMT",
"version": "v3"
}
] | 2018-12-27 | [
[
"Cho",
"Inyong",
""
],
[
"Kim",
"Hyeong-Chan",
""
]
] | We study a spherically symmetric spacetime made of anisotropic fluid of which radial equation of state is given by $p_1 = -\rho$. This provides analytic solutions and a good opportunity to study the static configuration of black hole plus matter. For a given equation-of-state parameter $w_2 = p_2/\rho$ for angular dire... |
gr-qc/0010010 | Israel Quiroz | R. Bonal, I. Quiros and R. Cardenas (Departamento de Fisica,
Universidad Central de Las Villas, Santa Clara, Villa Clara, Cuba) | Conformal general relativity contains the quantum | 11 pages, latex, no figures | null | null | null | gr-qc hep-th | null | Based on the de Broglie-Bohm relativistic quantum theory of motion we show
that the conformal formulation of general relativity, being linked with a
Weyl-integrable geometry, may implicitly contain the quantum effects of matter.
In this context the Mach's principle is discussed.
| [
{
"created": "Wed, 4 Oct 2000 04:34:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bonal",
"R.",
"",
"Departamento de Fisica,\n Universidad Central de Las Villas, Santa Clara, Villa Clara, Cuba"
],
[
"Quiros",
"I.",
"",
"Departamento de Fisica,\n Universidad Central de Las Villas, Santa Clara, Villa Clara, Cuba"
],
[
"Cardenas",
"R.",
"",
... | Based on the de Broglie-Bohm relativistic quantum theory of motion we show that the conformal formulation of general relativity, being linked with a Weyl-integrable geometry, may implicitly contain the quantum effects of matter. In this context the Mach's principle is discussed. |
1001.0861 | Amir Bina | A. Bina, S. Jalalzadeh, A. Moslehi | Quantum Black Hole in the Generalized Uncertainty Principle Framework | 11 pages, no figures, to appear in Physical Review D | Phys.Rev.D81:023528,2010 | 10.1103/PhysRevD.81.023528 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the effects of the Generalized Uncertainty Principle
(GUP) on canonical quantum gravity of black holes. Through the use of modified
partition function that involves the effects of the GUP, we obtain the
thermodynamical properties of the Schwarzschild black hole. We also calculate
the Hawking te... | [
{
"created": "Wed, 6 Jan 2010 11:10:25 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jan 2010 07:37:26 GMT",
"version": "v2"
}
] | 2010-05-12 | [
[
"Bina",
"A.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Moslehi",
"A.",
""
]
] | In this paper we study the effects of the Generalized Uncertainty Principle (GUP) on canonical quantum gravity of black holes. Through the use of modified partition function that involves the effects of the GUP, we obtain the thermodynamical properties of the Schwarzschild black hole. We also calculate the Hawking temp... |
0711.0285 | Edward Anderson | Edward Anderson | Does relationalism alone control geometrodynamics with sources? | 18 pages and 1 figure | null | null | null | gr-qc | null | This paper concerns relational first principles from which the Dirac
procedure exhaustively picks out the geometrodynamics corresponding to general
relativity as one of a handful of consistent theories. This was accompanied by
a number of results and conjectures about matter theories and general features
of physics -... | [
{
"created": "Fri, 2 Nov 2007 11:27:50 GMT",
"version": "v1"
}
] | 2007-11-05 | [
[
"Anderson",
"Edward",
""
]
] | This paper concerns relational first principles from which the Dirac procedure exhaustively picks out the geometrodynamics corresponding to general relativity as one of a handful of consistent theories. This was accompanied by a number of results and conjectures about matter theories and general features of physics -- ... |
gr-qc/0601025 | Abhas Mitra | Abhas Mitra | A generic relation between baryonic and radiative energy densities of
stars | Small changes at proof stage, shows zero radiation density for
collapse implies zero restmass density, MNRAS Letters (in press) | Mon.Not.Roy.Astron.Soc.Lett. 367 (2006) L66-L68 | 10.1111/j.1745-3933.2006.00141.x | null | gr-qc astro-ph | null | By using elementary astrophysical concepts, we show that for any
self-luminous astrophysical object, the ratio of radiation energy density
inside the body (rho_r) and the baryonic energy density (rho_0) may be crudely
approximated, in the Newtonian limit, as rho_r/rho_0 ~ GM/Rc^2, where G is
constant of gravitation, ... | [
{
"created": "Fri, 6 Jan 2006 12:21:47 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Feb 2006 12:17:10 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Mitra",
"Abhas",
""
]
] | By using elementary astrophysical concepts, we show that for any self-luminous astrophysical object, the ratio of radiation energy density inside the body (rho_r) and the baryonic energy density (rho_0) may be crudely approximated, in the Newtonian limit, as rho_r/rho_0 ~ GM/Rc^2, where G is constant of gravitation, c ... |
1207.0589 | Andrew Makarenko | Andrey N. Makarenko and Valery V. Obukhov | Exact Solutions in Modified Gravity Models | 10 pages | Entropy 2012, 14(7), 1140 | 10.3390/e14071140 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the exact solutions in modified gravity. It is one of the main
problems of mathematical physics for the gravity theory. One can obtain an
exact solution if the field equations reduce to a system of ordinary
differential equations. In this paper we consider a number of exact solutions
obtained by the method ... | [
{
"created": "Tue, 3 Jul 2012 07:41:31 GMT",
"version": "v1"
}
] | 2013-05-27 | [
[
"Makarenko",
"Andrey N.",
""
],
[
"Obukhov",
"Valery V.",
""
]
] | We review the exact solutions in modified gravity. It is one of the main problems of mathematical physics for the gravity theory. One can obtain an exact solution if the field equations reduce to a system of ordinary differential equations. In this paper we consider a number of exact solutions obtained by the method of... |
1108.1521 | Michael Coughlin | LIGO Scientific Collaboration and Virgo Collaboration: Michael W.
Coughlin | Identification of long-duration noise transients in LIGO and Virgo | 10 pages, 7 figures, Gravitational-wave Physics & Astronomy Workshop | null | 10.1088/0264-9381/28/23/235008 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The LIGO and Virgo detectors are sensitive to a variety of noise sources,
such as instrumental artifacts and environmental disturbances. The Stochastic
Transient Analysis Multi-detector Pipeline (STAMP) has been developed to search
for long-duration (t$\gtrsim$1s) gravitational-wave (GW) signals. This pipeline
can al... | [
{
"created": "Sun, 7 Aug 2011 02:34:58 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Nov 2011 15:00:52 GMT",
"version": "v2"
}
] | 2015-05-30 | [
[
"LIGO Scientific Collaboration",
"",
""
],
[
"Virgo Collaboration",
"",
""
],
[
"Coughlin",
"Michael W.",
""
]
] | The LIGO and Virgo detectors are sensitive to a variety of noise sources, such as instrumental artifacts and environmental disturbances. The Stochastic Transient Analysis Multi-detector Pipeline (STAMP) has been developed to search for long-duration (t$\gtrsim$1s) gravitational-wave (GW) signals. This pipeline can also... |
1009.4730 | Gim Seng Ng | Dionysios Anninos, Gim Seng Ng and Andrew Strominger | Asymptotic Symmetries and Charges in De Sitter Space | 16 pages, 1 figure | Class.Quant.Grav.28:175019,2011 | 10.1088/0264-9381/28/17/175019 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The asymptotic symmetry group (ASG) at future null infinity (I^+) of
four-dimensional de Sitter spacetimes is defined and shown to be given by the
group of three-dimensional diffeomorphisms acting on I^+. Finite charges are
constructed for each choice of ASG generator together with a two-surface on
I^+. A conservatio... | [
{
"created": "Thu, 23 Sep 2010 21:51:23 GMT",
"version": "v1"
}
] | 2011-08-22 | [
[
"Anninos",
"Dionysios",
""
],
[
"Ng",
"Gim Seng",
""
],
[
"Strominger",
"Andrew",
""
]
] | The asymptotic symmetry group (ASG) at future null infinity (I^+) of four-dimensional de Sitter spacetimes is defined and shown to be given by the group of three-dimensional diffeomorphisms acting on I^+. Finite charges are constructed for each choice of ASG generator together with a two-surface on I^+. A conservation ... |
gr-qc/0209023 | John W. Barrett | John W Barrett and Christopher M Steele | Asymptotics of Relativistic Spin Networks | 31 pages, latex. v3: minor clarifications | Class.Quant.Grav. 20 (2003) 1341-1362 | 10.1088/0264-9381/20/7/307 | null | gr-qc | null | The stationary phase technique is used to calculate asymptotic formulae for
SO(4) Relativistic Spin Networks. For the tetrahedral spin network this gives
the square of the Ponzano-Regge asymptotic formula for the SU(2) 6j symbol. For
the 4-simplex (10j-symbol) the asymptotic formula is compared with numerical
calcula... | [
{
"created": "Sat, 7 Sep 2002 13:39:14 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Oct 2002 15:53:18 GMT",
"version": "v2"
},
{
"created": "Fri, 31 Jan 2003 16:18:12 GMT",
"version": "v3"
}
] | 2017-08-23 | [
[
"Barrett",
"John W",
""
],
[
"Steele",
"Christopher M",
""
]
] | The stationary phase technique is used to calculate asymptotic formulae for SO(4) Relativistic Spin Networks. For the tetrahedral spin network this gives the square of the Ponzano-Regge asymptotic formula for the SU(2) 6j symbol. For the 4-simplex (10j-symbol) the asymptotic formula is compared with numerical calculati... |
1502.03658 | Abraham Harte | Abraham I. Harte | Optics in a nonlinear gravitational plane wave | 32 pages, minor additional explanations | null | 10.1088/0264-9381/32/17/175017 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves can act like gravitational lenses, affecting the observed
positions, brightnesses, and redshifts of distant objects. Exact expressions
for such effects are derived here in general relativity, allowing for
arbitrarily-moving sources and observers in the presence of plane-symmetric
gravitational wav... | [
{
"created": "Thu, 12 Feb 2015 13:55:49 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Aug 2015 16:55:25 GMT",
"version": "v2"
}
] | 2015-08-26 | [
[
"Harte",
"Abraham I.",
""
]
] | Gravitational waves can act like gravitational lenses, affecting the observed positions, brightnesses, and redshifts of distant objects. Exact expressions for such effects are derived here in general relativity, allowing for arbitrarily-moving sources and observers in the presence of plane-symmetric gravitational waves... |
1811.11565 | Jose Socorro Garcia | J. Socorro, Omar E. N\'u\~nez and Rafael Hern\'andez-Jim\'enez | Classical and quantum exact solutions for a FRW multi-scalar field
cosmology with an exponential potential driven inflation | Latex file, accepted in Advances and Mathematical physics, Hindawi.
arXiv admin note: text overlap with arXiv:1806.01190 | Advances in Math. Phys. Volume (2018), Article ID 3468381 | 10.1155/2018/3468381 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A flat Fiedmann-Robertson-Walker (FRW) multi-scalar field cosmology is
studied with a particular potential of the form $ \rm V(\phi,\sigma)=V_0
e^{-\lambda_1 \phi-\lambda_2 \sigma}$, which emerges as a relation between the
time derivatives of the scalars field momenta. Classically, by employing the
Hamiltonian formal... | [
{
"created": "Tue, 27 Nov 2018 02:39:10 GMT",
"version": "v1"
}
] | 2019-11-21 | [
[
"Socorro",
"J.",
""
],
[
"Núñez",
"Omar E.",
""
],
[
"Hernández-Jiménez",
"Rafael",
""
]
] | A flat Fiedmann-Robertson-Walker (FRW) multi-scalar field cosmology is studied with a particular potential of the form $ \rm V(\phi,\sigma)=V_0 e^{-\lambda_1 \phi-\lambda_2 \sigma}$, which emerges as a relation between the time derivatives of the scalars field momenta. Classically, by employing the Hamiltonian formalis... |
0802.4038 | Gonzalo Olmo | Gonzalo J. Olmo | Hydrogen atom in Palatini theories of gravity | 8 pages, 2 figures, appendix added with an estimation of the half
life of Hydrogen in the 1/R model to match the published version | Phys.Rev.D77:084021,2008 | 10.1103/PhysRevD.77.084021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effects that the gravitational interaction of $f(R)$ theories of
gravity in Palatini formalism has on the stationary states of the Hydrogen
atom. We show that the role of gravity in this system is very important for
lagrangians $f(R)$ with terms that grow at low curvatures, which have been
proposed to ex... | [
{
"created": "Wed, 27 Feb 2008 16:01:31 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jun 2008 08:13:49 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Olmo",
"Gonzalo J.",
""
]
] | We study the effects that the gravitational interaction of $f(R)$ theories of gravity in Palatini formalism has on the stationary states of the Hydrogen atom. We show that the role of gravity in this system is very important for lagrangians $f(R)$ with terms that grow at low curvatures, which have been proposed to expl... |
2007.00687 | Justin Feng | Chinmoy Bhattacharjee, Justin C. Feng | On Beltrami states near black hole event horizon | 11 pages | Physics of Plasmas 27, 072901 (2020) | 10.1063/5.0010050 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we study Beltrami equilibria for plasmas in near the horizon
of a spinning black hole, and develop a framework for constructing the magnetic
field profile in the near horizon limit for Clebsch flows in the single-fluid
approximation. We find that the horizon profile for the magnetic field is shown
to... | [
{
"created": "Wed, 1 Jul 2020 18:15:55 GMT",
"version": "v1"
}
] | 2020-07-03 | [
[
"Bhattacharjee",
"Chinmoy",
""
],
[
"Feng",
"Justin C.",
""
]
] | In this article, we study Beltrami equilibria for plasmas in near the horizon of a spinning black hole, and develop a framework for constructing the magnetic field profile in the near horizon limit for Clebsch flows in the single-fluid approximation. We find that the horizon profile for the magnetic field is shown to s... |
1610.01237 | Sijie Gao | Yuan Zhang and Sijie Gao | First law and Smarr formula of black hole mechanics in nonlinear gauge
theories | 22 pages,1 figure. Discussion and results expanded, title changed,
matches published version | Class. Quantum Grav. 35,145007 (2018) | 10.1088/1361-6382/aac9d4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the fact that Bardeen black holes do not satisfy the usual first
law and Smarr formula, we derive a generalized first law from the Lagrangian of
nonlinear gauge field coupled to gravity. In our treatment, the Lagrangian is a
function of the electromagnetic invariant as well as some additional
parameters.... | [
{
"created": "Wed, 5 Oct 2016 00:42:55 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Oct 2016 00:57:35 GMT",
"version": "v2"
},
{
"created": "Fri, 17 Aug 2018 13:30:38 GMT",
"version": "v3"
}
] | 2018-08-20 | [
[
"Zhang",
"Yuan",
""
],
[
"Gao",
"Sijie",
""
]
] | Motivated by the fact that Bardeen black holes do not satisfy the usual first law and Smarr formula, we derive a generalized first law from the Lagrangian of nonlinear gauge field coupled to gravity. In our treatment, the Lagrangian is a function of the electromagnetic invariant as well as some additional parameters. C... |
1803.04992 | Alexander B. Balakin | Alexander B. Balakin and Alexey V. Andreyanov | SU(N) - symmetric dynamic aether: General formalism and a hypothesis on
spontaneous color polarization | 23 pages, Invited paper for the Journal "Space, Time and Fundamental
Interactions" | Space, Time and Fund. Interact., 2017, No.4, pp.36-58 | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The SU(N)-symmetric generalization of the model of the electromagnetically
active dynamic aether is formulated. This generalization is based on the
introduction of a Yang-Mills gauge field instead of the Maxwell field, and of a
SU(N)-multiplet of vector fields instead of the standard single vector field.
In the frame... | [
{
"created": "Tue, 13 Mar 2018 18:09:36 GMT",
"version": "v1"
}
] | 2018-03-15 | [
[
"Balakin",
"Alexander B.",
""
],
[
"Andreyanov",
"Alexey V.",
""
]
] | The SU(N)-symmetric generalization of the model of the electromagnetically active dynamic aether is formulated. This generalization is based on the introduction of a Yang-Mills gauge field instead of the Maxwell field, and of a SU(N)-multiplet of vector fields instead of the standard single vector field. In the framewo... |
2205.07242 | Sen Guo | Sen Guo, Ke-Jian He, Guan-Ru Li, Guo-Ping Li | The shadow and photon sphere of the charged black hole in Rastall
gravity | null | Published Classical and Quantum Gravity, Vol:38 165013 (2021) | 10.1088/1361-6382/ac12e4 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Considering a charged black hole (BH) surrounded by a perfect fluid radiation
field (PFRF) in Rastall gravity, we investigate this BH shadow and photon
sphere on different spherical accretions backgrounds. The effect of the PFRF
parameter/BH charge on the critical impact parameter is studied by
investigating the ligh... | [
{
"created": "Sun, 15 May 2022 10:00:05 GMT",
"version": "v1"
}
] | 2022-05-17 | [
[
"Guo",
"Sen",
""
],
[
"He",
"Ke-Jian",
""
],
[
"Li",
"Guan-Ru",
""
],
[
"Li",
"Guo-Ping",
""
]
] | Considering a charged black hole (BH) surrounded by a perfect fluid radiation field (PFRF) in Rastall gravity, we investigate this BH shadow and photon sphere on different spherical accretions backgrounds. The effect of the PFRF parameter/BH charge on the critical impact parameter is studied by investigating the light ... |
1012.3085 | Dmitri Gal'tsov | Dmitri V. Gal'tsov and Pavel Spirin | Radiation reaction in curved even-dimensional spacetime | null | Published in Grav.Cosmol.13:241-252,2007 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a new method of computing radiation reaction for a point particle
interacting with massless scalar and vector fields in curved space-time. It is
based on the analysis of field Green's functions with both points lying on the
particle world-line and does not require integration of the field stresses
outside ... | [
{
"created": "Tue, 14 Dec 2010 16:42:05 GMT",
"version": "v1"
}
] | 2010-12-15 | [
[
"Gal'tsov",
"Dmitri V.",
""
],
[
"Spirin",
"Pavel",
""
]
] | We develop a new method of computing radiation reaction for a point particle interacting with massless scalar and vector fields in curved space-time. It is based on the analysis of field Green's functions with both points lying on the particle world-line and does not require integration of the field stresses outside th... |
1611.03972 | Daniele Malafarina | Batyr Ilyas, Jinye Yang, Daniele Malafarina, Cosimo Bambi | Observational properties of rigidly rotating dust configurations | 8 pages, 5 figures, to appear in EPJC | Eur. Phys. J. C77: 461 (2017) | 10.1140/epjc/s10052-017-5014-3 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the observational properties of a class of exact solutions of
Einstein's field equations describing stationary, axially symmetric, rigidly
rotating dust (i.e. non interacting particles). We ask the question whether
such solutions can describe astrophysical rotating dark matter clouds near the
center of galax... | [
{
"created": "Sat, 12 Nov 2016 08:33:13 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jun 2017 08:31:15 GMT",
"version": "v2"
}
] | 2017-07-18 | [
[
"Ilyas",
"Batyr",
""
],
[
"Yang",
"Jinye",
""
],
[
"Malafarina",
"Daniele",
""
],
[
"Bambi",
"Cosimo",
""
]
] | We study the observational properties of a class of exact solutions of Einstein's field equations describing stationary, axially symmetric, rigidly rotating dust (i.e. non interacting particles). We ask the question whether such solutions can describe astrophysical rotating dark matter clouds near the center of galaxie... |
1903.05500 | Alexander Petrov Nikolaevich | A. N. Petrov | Field-theoretical construction of currents and superpotentials in
Lovelock gravity | 29 pages, to appear in Class. Quantum Grav | Class. Quantum Grav., 2019, 36(23), 235021(22pp) | 10.1088/1361-6382/ab516d | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Conserved currents and related superpotentials for perturbations on arbitrary
backgrounds in the Lovelock theory are constructed. We use the Lagrangian based
field-theoretical method where perturbations are considered as dynamical fields
propagating on a given background. Such a formulation is exact (not
approximate)... | [
{
"created": "Wed, 13 Mar 2019 14:09:50 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Mar 2019 15:10:23 GMT",
"version": "v2"
},
{
"created": "Fri, 25 Oct 2019 15:57:40 GMT",
"version": "v3"
}
] | 2019-11-19 | [
[
"Petrov",
"A. N.",
""
]
] | Conserved currents and related superpotentials for perturbations on arbitrary backgrounds in the Lovelock theory are constructed. We use the Lagrangian based field-theoretical method where perturbations are considered as dynamical fields propagating on a given background. Such a formulation is exact (not approximate) a... |
0901.3722 | Jorge L. Cervantes-Cota | Alejandro Aviles Cervantes, Jorge L. Cervantes-Cota | Cosmological phase space of R^n gravity | 8 pages, 3 figures | AIP Conf.Proc.1083:57-64,2008 | 10.1063/1.3058579 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present some exact solutions and a phase space analysis of metric
$f(R)$-gravity models of the type $R^{n}$. We divide our discussion in $n\neq2$
and $n=2$ models. The later model is a good approximation, at late times to the
$f(R) = \frac{2}{\pi}R \tan^{-1}(R/\beta^2)$ gravity model, being this an
example of a no... | [
{
"created": "Fri, 23 Jan 2009 16:43:41 GMT",
"version": "v1"
}
] | 2009-03-31 | [
[
"Cervantes",
"Alejandro Aviles",
""
],
[
"Cervantes-Cota",
"Jorge L.",
""
]
] | We present some exact solutions and a phase space analysis of metric $f(R)$-gravity models of the type $R^{n}$. We divide our discussion in $n\neq2$ and $n=2$ models. The later model is a good approximation, at late times to the $f(R) = \frac{2}{\pi}R \tan^{-1}(R/\beta^2)$ gravity model, being this an example of a non-... |
2311.13607 | Dr. Ritika Nagpal | J. K. Singh, Ritika Nagpal | A model of dark matter dark energy interaction with some cosmic
consequences | 19 pages, 17 figures | Indian Journal of Physics 2023 | 10.1007/s12648-023-03002-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, we will look at an interacting dark energy model. In the
framework of Friedmann-Robertson-Walker (FRW) space-time, we have made the
hypothesis of an interacting scheme between two fields (dark matter (DM) and
dark energy (DE)). The evolution of the dark energy model in the
above-mentioned spatially and... | [
{
"created": "Tue, 21 Nov 2023 13:04:08 GMT",
"version": "v1"
}
] | 2023-11-27 | [
[
"Singh",
"J. K.",
""
],
[
"Nagpal",
"Ritika",
""
]
] | In this study, we will look at an interacting dark energy model. In the framework of Friedmann-Robertson-Walker (FRW) space-time, we have made the hypothesis of an interacting scheme between two fields (dark matter (DM) and dark energy (DE)). The evolution of the dark energy model in the above-mentioned spatially and h... |
gr-qc/9705033 | Luis Lehner | N. Bishop, R. Gomez, L. Lehner and J. Winicour | Cauchy-characteristic extraction in numerical relativity | 33 pages, 4 figures | Phys. Rev. D Vol:54, N:10 | null | null | gr-qc | null | We treat the calculation of gravitational radiation using the mixed
timelike-null initial value formulation of general relativity. The
determination of an exterior radiative solution is based on boundary values on
a timelike worldtube $\Gamma$ and on characteristic data on an outgoing null
cone emanating from an init... | [
{
"created": "Tue, 13 May 1997 19:08:33 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bishop",
"N.",
""
],
[
"Gomez",
"R.",
""
],
[
"Lehner",
"L.",
""
],
[
"Winicour",
"J.",
""
]
] | We treat the calculation of gravitational radiation using the mixed timelike-null initial value formulation of general relativity. The determination of an exterior radiative solution is based on boundary values on a timelike worldtube $\Gamma$ and on characteristic data on an outgoing null cone emanating from an initia... |
1711.05301 | Aurelien Barrau | Aur\'elien Barrau, Killian Martineau, Flora Moulin | Seeing through the cosmological bounce: Footprints of the contracting
phase and luminosity distance in bouncing models | null | Phys. Rev. D 96, 123520 (2017) | 10.1103/PhysRevD.96.123520 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The evolution of the luminosity distance in a contracting universe is
studied. It is shown that for quite a lot of natural dynamical evolutions, its
behavior is far from trivial and its value can even decrease with an increasing
time interval between events. The consequences are investigated and it is
underlined that... | [
{
"created": "Tue, 14 Nov 2017 20:05:03 GMT",
"version": "v1"
}
] | 2017-12-27 | [
[
"Barrau",
"Aurélien",
""
],
[
"Martineau",
"Killian",
""
],
[
"Moulin",
"Flora",
""
]
] | The evolution of the luminosity distance in a contracting universe is studied. It is shown that for quite a lot of natural dynamical evolutions, its behavior is far from trivial and its value can even decrease with an increasing time interval between events. The consequences are investigated and it is underlined that t... |
1407.2252 | Yi-Zen Chu | Yi-Zen Chu | Scalar Wave Tails in Even Dimensional Weakly Curved Static Newtonian
Spacetimes | 16 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a 4-dimensional (4D) weak field geometry governed by the linearized
Einstein's equations and sourced primarily by a static, spatially localized,
but otherwise arbitrary mass density $T_{00}$, it is known that the leading
order tail part of the Green's functions of the minimally coupled massless
scalar, Lorenz gaug... | [
{
"created": "Tue, 8 Jul 2014 20:00:15 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Jul 2014 20:00:15 GMT",
"version": "v2"
}
] | 2014-07-17 | [
[
"Chu",
"Yi-Zen",
""
]
] | In a 4-dimensional (4D) weak field geometry governed by the linearized Einstein's equations and sourced primarily by a static, spatially localized, but otherwise arbitrary mass density $T_{00}$, it is known that the leading order tail part of the Green's functions of the minimally coupled massless scalar, Lorenz gauge ... |
gr-qc/0501059 | Matteo Luca Ruggiero | Angelo Tartaglia, Matteo Luca Ruggiero, Alessandro Nagar | On the time delay in binary systems | 7 pages, 2 eps figures, RevTex, to appear in Physical Review D | Phys.Rev. D71 (2005) 023003 | 10.1103/PhysRevD.71.023003 | null | gr-qc astro-ph | null | The aim of this paper is to study the time delay on electromagnetic signals
propagating across a binary stellar system. We focus on the antisymmetric
gravitomagnetic contribution due to the angular momentum of one of the stars of
the pair. Considering a pulsar as the source of the signals, the effect would
be manifes... | [
{
"created": "Wed, 19 Jan 2005 12:39:03 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Jan 2005 09:55:11 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Tartaglia",
"Angelo",
""
],
[
"Ruggiero",
"Matteo Luca",
""
],
[
"Nagar",
"Alessandro",
""
]
] | The aim of this paper is to study the time delay on electromagnetic signals propagating across a binary stellar system. We focus on the antisymmetric gravitomagnetic contribution due to the angular momentum of one of the stars of the pair. Considering a pulsar as the source of the signals, the effect would be manifest ... |
1504.01657 | Shamaila Rani | Abdul Jawad and Shamaila Rani | Lorentz Distributed Noncommutative Wormhole Solutions in Extended
Teleparallel Gravity | 25 pages, 21 figures, Accepted in EPJC | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study static spherically symmetric wormhole solutions in
extended teleparallel gravity with the inclusion of noncommutative geometry
under Lorentzian distribution. We obtain expressions of matter components for
non-diagonal tetrad. The effective energy-momentum tensor leads to the
violation of energ... | [
{
"created": "Fri, 3 Apr 2015 11:02:07 GMT",
"version": "v1"
}
] | 2015-04-08 | [
[
"Jawad",
"Abdul",
""
],
[
"Rani",
"Shamaila",
""
]
] | In this paper, we study static spherically symmetric wormhole solutions in extended teleparallel gravity with the inclusion of noncommutative geometry under Lorentzian distribution. We obtain expressions of matter components for non-diagonal tetrad. The effective energy-momentum tensor leads to the violation of energy ... |
gr-qc/9601015 | K. Kokkotas | Nils Andersson (Cardiff), Kostas D. Kokkotas (Thessaloniki) and
Bernard F. Schutz (Cardiff) | Spacetime modes of relativistic stars | 4 pages, MN.STY, 2 postscript figures | Mon.Not.Roy.Astron.Soc. 280 (1996) 1230 | 10.1093/mnras/280.4.1230 | null | gr-qc | null | The problem of relativistic stellar pulsations is studied in a somewhat ad
hoc approximation that ignores all fluid motions. This {\em Inverse Cowling
Approximation} (ICA) is motivated by two observations: 1) For highly damped
($w$-mode) oscillations the fluid plays very little role. 2) If the fluid
motion is neglect... | [
{
"created": "Wed, 10 Jan 1996 12:24:45 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Andersson",
"Nils",
"",
"Cardiff"
],
[
"Kokkotas",
"Kostas D.",
"",
"Thessaloniki"
],
[
"Schutz",
"Bernard F.",
"",
"Cardiff"
]
] | The problem of relativistic stellar pulsations is studied in a somewhat ad hoc approximation that ignores all fluid motions. This {\em Inverse Cowling Approximation} (ICA) is motivated by two observations: 1) For highly damped ($w$-mode) oscillations the fluid plays very little role. 2) If the fluid motion is neglected... |
gr-qc/0602010 | Daniele Oriti | Daniele Oriti and James Ryan | Group field theory formulation of 3d quantum gravity coupled to matter
fields | RevTeX; 28 pages, 21 figures | Class.Quant.Grav. 23 (2006) 6543-6576 | 10.1088/0264-9381/23/22/027 | null | gr-qc | null | We present a new group field theory describing 3d Riemannian quantum gravity
coupled to matter fields for any choice of spin and mass. The perturbative
expansion of the partition function produces fat graphs colored with SU(2)
algebraic data, from which one can reconstruct at once a 3-dimensional
simplicial complex r... | [
{
"created": "Thu, 2 Feb 2006 17:30:28 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Oriti",
"Daniele",
""
],
[
"Ryan",
"James",
""
]
] | We present a new group field theory describing 3d Riemannian quantum gravity coupled to matter fields for any choice of spin and mass. The perturbative expansion of the partition function produces fat graphs colored with SU(2) algebraic data, from which one can reconstruct at once a 3-dimensional simplicial complex rep... |
2006.06483 | Marc Casals | Marc Casals, C\'assio I.S. Marinho | Glimpses of Violation of Strong Cosmic Censorship in Rotating Black
Holes | 16 pages, 5 figures. V3 (essentially) matches the published version
in Phys. Rev. D | Phys. Rev. D 106, 044060, 2022 | 10.1103/PhysRevD.106.044060 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Rotating and/or charged black hole spacetimes possess a Cauchy horizon,
beyond which Einstein's equations of General Relativity cease to be
deterministic. This led to the formulation of the Strong Cosmic Censorship
conjecture that such horizons become irregular under field perturbations. We
consider linear field pert... | [
{
"created": "Thu, 11 Jun 2020 14:51:13 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jun 2022 23:56:13 GMT",
"version": "v2"
},
{
"created": "Sat, 17 Sep 2022 10:52:46 GMT",
"version": "v3"
}
] | 2022-09-20 | [
[
"Casals",
"Marc",
""
],
[
"Marinho",
"Cássio I. S.",
""
]
] | Rotating and/or charged black hole spacetimes possess a Cauchy horizon, beyond which Einstein's equations of General Relativity cease to be deterministic. This led to the formulation of the Strong Cosmic Censorship conjecture that such horizons become irregular under field perturbations. We consider linear field pertur... |
1404.3872 | Jie-Xiong Mo | Jie-Xiong Mo and Wen-Biao Liu | Ehrenfest scheme for $P-V$ criticality of higher dimensional charged
black holes, rotating black holes and Gauss-Bonnet AdS black holes | 12 pages | Phys. Rev. D 89, 084057 (2014) | 10.1103/PhysRevD.89.084057 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To provide an analytic verification of the nature of phase transition at the
critical point of $P-V$ criticality, the original expressions of Ehrenfest
equations have been introduced directly. By treating the cosmological constant
and its conjugate quantity as thermodynamic pressure and volume respectively,
we carry ... | [
{
"created": "Tue, 15 Apr 2014 11:32:31 GMT",
"version": "v1"
}
] | 2014-04-16 | [
[
"Mo",
"Jie-Xiong",
""
],
[
"Liu",
"Wen-Biao",
""
]
] | To provide an analytic verification of the nature of phase transition at the critical point of $P-V$ criticality, the original expressions of Ehrenfest equations have been introduced directly. By treating the cosmological constant and its conjugate quantity as thermodynamic pressure and volume respectively, we carry ou... |
gr-qc/0512120 | Ujjal Debnath | Soma Nath, Subenoy Chakraborty, Ujjal Debnath | Gravitational collapse due to dark matter and dark energy in the brane
world scenario | 10 Latex Pages, RevTex style, 4 figures | Int.J.Mod.Phys. D15 (2006) 1225-1236 | 10.1142/S0218271806008917 | null | gr-qc | null | Gravitational collapse of FRW brane world embedded in a conformaly flat bulk
is considered for matter cloud consists of dark matter and dark energy with
equation of state $p=\epsilon \rho$ $(\epsilon<-{1/3})$. The effect of dark
matter and dark energy is being considered first separately and then a
combination of the... | [
{
"created": "Wed, 21 Dec 2005 04:13:39 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Nath",
"Soma",
""
],
[
"Chakraborty",
"Subenoy",
""
],
[
"Debnath",
"Ujjal",
""
]
] | Gravitational collapse of FRW brane world embedded in a conformaly flat bulk is considered for matter cloud consists of dark matter and dark energy with equation of state $p=\epsilon \rho$ $(\epsilon<-{1/3})$. The effect of dark matter and dark energy is being considered first separately and then a combination of them ... |
gr-qc/9808031 | GR visitor account | Daksh Lohiya, Annu Batra, Shobhit Mahajan, Amitabha Mukherjee
(Department of Physica, University of Delhi, Delhi, India) | Nucleosynthesis in a simmering univeerse | Plian Tex, 10 Pages | null | null | ducos - dl - 9804 | gr-qc | null | Primordial nucleosynthesis is considered a success story of the standard big
bang (SBB) cosmology. The cosmological and elementary particle physics
parameters are believed to be severely constrained by the requirement of
correct abundances of light elements. We explore nucleosynthesis in a class of
models very differ... | [
{
"created": "Tue, 11 Aug 1998 14:38:58 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Lohiya",
"Daksh",
"",
"Department of Physica, University of Delhi, Delhi, India"
],
[
"Batra",
"Annu",
"",
"Department of Physica, University of Delhi, Delhi, India"
],
[
"Mahajan",
"Shobhit",
"",
"Department of Physica, University of Delhi, Delhi, India"
... | Primordial nucleosynthesis is considered a success story of the standard big bang (SBB) cosmology. The cosmological and elementary particle physics parameters are believed to be severely constrained by the requirement of correct abundances of light elements. We explore nucleosynthesis in a class of models very differen... |
gr-qc/9905036 | Zahid Zakir | Zahid Zakir (CTPA) | Four-Index Energy-Momentum Tensors for Gravitation and Matter | Published in "Z.Zakir (2003) Structure of Space-Time and Matter.
CTPA, Tashkent" | Theor. Phys., Astrophys. and Cosmol., 5 (2010) 18 | 10.9751/TPAC.3600-018 | null | gr-qc | null | The 4-index energy-momentum tensors for gravitation and matter are analyzed
on the basis of new equations for the gravitational field with the Riemann
tensor. Some properties of the such defined gravitational energy are discussed.
| [
{
"created": "Wed, 12 May 1999 07:22:09 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Jul 1999 23:25:18 GMT",
"version": "v2"
},
{
"created": "Fri, 17 Oct 2003 13:59:39 GMT",
"version": "v3"
}
] | 2012-10-09 | [
[
"Zakir",
"Zahid",
"",
"CTPA"
]
] | The 4-index energy-momentum tensors for gravitation and matter are analyzed on the basis of new equations for the gravitational field with the Riemann tensor. Some properties of the such defined gravitational energy are discussed. |
gr-qc/0002083 | Carlo Rovelli | Michael Reisenberger and Carlo Rovelli | Spin foams as Feynman diagrams | 9 pages, 4 figures | null | null | null | gr-qc hep-th | null | It has been recently shown that a certain non-topological spin foam model can
be obtained from the Feynman expansion of a field theory over a group. The
field theory defines a natural ``sum over triangulations'', which removes the
cut off on the number of degrees of freedom and restores full covariance. The
resulting... | [
{
"created": "Thu, 24 Feb 2000 11:40:25 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Reisenberger",
"Michael",
""
],
[
"Rovelli",
"Carlo",
""
]
] | It has been recently shown that a certain non-topological spin foam model can be obtained from the Feynman expansion of a field theory over a group. The field theory defines a natural ``sum over triangulations'', which removes the cut off on the number of degrees of freedom and restores full covariance. The resulting f... |
gr-qc/9712076 | Thierry Kauffmann | Thierry Kauffmann | Testing the Equivalence Principle in Quantum Physics | 11 pages, LateX | null | null | null | gr-qc | null | We showed in a previous paper that a wide class of nonmetric theories of
gravity encompassed by the $\chi g$ formalism predict that the speed of light
rays depends on the their polarization direction relative to directions singled
out by the gravitational field. This gravity-induced birefringence of space is
a violat... | [
{
"created": "Wed, 17 Dec 1997 15:58:05 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kauffmann",
"Thierry",
""
]
] | We showed in a previous paper that a wide class of nonmetric theories of gravity encompassed by the $\chi g$ formalism predict that the speed of light rays depends on the their polarization direction relative to directions singled out by the gravitational field. This gravity-induced birefringence of space is a violatio... |
2210.00468 | Ali \"Ovg\"un Dr. | Yashmitha Kumaran and Ali \"Ovg\"un | Deflection angle and shadow of the Reissner-Nordstr\"om black hole with
higher-order magnetic correction in Einstein-nonlinear-Maxwell fields | Accepted for publication in Symmetry "Special Issue: Numerical
Relativity and Gravitational Wave"
(https://www.mdpi.com/2073-8994/14/10/2054) | Symmetry 2022, 14(10), 2054 | 10.3390/sym14102054 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Nonlinear electrodynamics is known as the generalizations of Maxwell
electrodynamics at strong fields and presents interesting features such as
curing the classical divergences present in the linear theory when coupled to
general relativity. In this paper, we consider the asymptotically flat
Reissner-Nordstr\"om blac... | [
{
"created": "Sun, 2 Oct 2022 09:19:54 GMT",
"version": "v1"
}
] | 2022-10-04 | [
[
"Kumaran",
"Yashmitha",
""
],
[
"Övgün",
"Ali",
""
]
] | Nonlinear electrodynamics is known as the generalizations of Maxwell electrodynamics at strong fields and presents interesting features such as curing the classical divergences present in the linear theory when coupled to general relativity. In this paper, we consider the asymptotically flat Reissner-Nordstr\"om black ... |
1902.10133 | Luis Herrera | L. Herrera, A. Di Prisco, J. Ospino | Complexity factors for axially symmetric static sources | 11 pages, Revtex-4. Published in Phys.Rev.D. arXiv admin note: text
overlap with arXiv:1301.2424 | Phys. Rev. D99, 044049, (2019) | 10.1103/PhysRevD.99.044049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A previously found definition of complexity for spherically symmetric fluid
distributions [1], is extended to axially symmetric static sources. In this
case there are three different complexity factors, defined in terms of three
structure scalars obtained from the orthogonal splitting of the Riemann tensor.
All these... | [
{
"created": "Tue, 26 Feb 2019 08:57:15 GMT",
"version": "v1"
}
] | 2019-03-20 | [
[
"Herrera",
"L.",
""
],
[
"Di Prisco",
"A.",
""
],
[
"Ospino",
"J.",
""
]
] | A previously found definition of complexity for spherically symmetric fluid distributions [1], is extended to axially symmetric static sources. In this case there are three different complexity factors, defined in terms of three structure scalars obtained from the orthogonal splitting of the Riemann tensor. All these t... |
gr-qc/0412117 | Valery Kiselev | V.V.Kiselev | A quantum mass-spectrum of Kerr black hole: superstrings | 10 pages, 4 eps-figures, iopart class, comments and references added | null | null | null | gr-qc astro-ph hep-th | null | Using thermal quantization of geodesics confined under horizons and
reasonable conjecture on massless modes, we evaluate quantum spectrum of Kerr
black hole masses compatible with superstring symmetries.
| [
{
"created": "Thu, 23 Dec 2004 07:45:43 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jan 2005 09:33:47 GMT",
"version": "v2"
},
{
"created": "Wed, 12 Jan 2005 12:23:30 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Kiselev",
"V. V.",
""
]
] | Using thermal quantization of geodesics confined under horizons and reasonable conjecture on massless modes, we evaluate quantum spectrum of Kerr black hole masses compatible with superstring symmetries. |
gr-qc/0312102 | Demetrios Papadopoulos | D. B. Papadopoulos | Gravitational waves interacting with a spinning charged particle in the
presence of a uniform magnetic field | 19 pages, accepted for publication in Gen. Rel. Grav | Gen.Rel.Grav. 36 (2004) 949-966 | 10.1023/B:GERG.0000018083.70012.74 | null | gr-qc | null | The equations which determine the response of a spinning charged particle
moving in a uniform magnetic field to an incident gravitational wave are
derived in the linearized approximation to general relativity. We verify that
1) the components of the 4-momentum, 4-velocity and the components of the
spinning tensor, bo... | [
{
"created": "Tue, 23 Dec 2003 11:34:36 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Papadopoulos",
"D. B.",
""
]
] | The equations which determine the response of a spinning charged particle moving in a uniform magnetic field to an incident gravitational wave are derived in the linearized approximation to general relativity. We verify that 1) the components of the 4-momentum, 4-velocity and the components of the spinning tensor, both... |
gr-qc/0512076 | Jorma Louko | Jorma Louko | Group averaging, positive definiteness and superselection sectors | 9 pages, uses jpconf. Talk given at the Fourth Meeting on Constrained
Dynamics and Quantum Gravity (Cala Gonone, Sardinia, Italy, 12--16 September
2005) | J.Phys.Conf.Ser. 33 (2006) 142-149 | 10.1088/1742-6596/33/1/013 | null | gr-qc hep-th math-ph math.MP | null | I discuss group averaging as a method for quantising constrained systems
whose gauge group is a noncompact Lie group. Focussing on three case studies, I
address the convergence of the averaging, possible indefiniteness of the
prospective physical inner product and the emergence of superselection sectors.
| [
{
"created": "Tue, 13 Dec 2005 10:41:12 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Louko",
"Jorma",
""
]
] | I discuss group averaging as a method for quantising constrained systems whose gauge group is a noncompact Lie group. Focussing on three case studies, I address the convergence of the averaging, possible indefiniteness of the prospective physical inner product and the emergence of superselection sectors. |
2209.14269 | Gopi Kant Goswami Dr | Anirudh Pradhan, Dinesh Chandra Maurya, Gopikant K. Goswami,
Aroonkumar Beesham | Modeling Transit Dark Energy in $f(R, L_m)$-gravity | 22 pages, 17 figures, | null | 10.1142/S0219887823501050 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This research paper deals with a transit dark energy cosmological model in
$f(R, L_{m})$-gravity with observational constraints. For this, we consider a
flat FLRW space-time and have taken a cosmological cosntant-like parameter
$\beta$ in our field equations. The model has two energy parameters~
$\Omega_{m0}~ and~ \O... | [
{
"created": "Mon, 26 Sep 2022 15:07:18 GMT",
"version": "v1"
}
] | 2023-05-03 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Maurya",
"Dinesh Chandra",
""
],
[
"Goswami",
"Gopikant K.",
""
],
[
"Beesham",
"Aroonkumar",
""
]
] | This research paper deals with a transit dark energy cosmological model in $f(R, L_{m})$-gravity with observational constraints. For this, we consider a flat FLRW space-time and have taken a cosmological cosntant-like parameter $\beta$ in our field equations. The model has two energy parameters~ $\Omega_{m0}~ and~ \Ome... |
1906.10901 | Chunyu Zhang | Chunyu Zhang, Qing Gao, Yungui Gong, Dicong Liang, Alan J. Weinstein,
Chao Zhang | Frequency response of time-delay interferometry for space-based
gravitational wave antennas | 35 pages, 8 figures | Phys. Rev. D 100, 064033 (2019) | 10.1103/PhysRevD.100.064033 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Space-based gravitational wave detectors cannot keep rigid structures and
precise arm length equality, so the precise equality of detector arms which is
required in a ground-based interferometer to cancel the overwhelming laser
noise is impossible. The time-delay interferometry method is applied to unequal
arm length... | [
{
"created": "Wed, 26 Jun 2019 08:08:53 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Jul 2019 05:17:01 GMT",
"version": "v2"
},
{
"created": "Sun, 15 Sep 2019 04:55:15 GMT",
"version": "v3"
}
] | 2019-09-25 | [
[
"Zhang",
"Chunyu",
""
],
[
"Gao",
"Qing",
""
],
[
"Gong",
"Yungui",
""
],
[
"Liang",
"Dicong",
""
],
[
"Weinstein",
"Alan J.",
""
],
[
"Zhang",
"Chao",
""
]
] | Space-based gravitational wave detectors cannot keep rigid structures and precise arm length equality, so the precise equality of detector arms which is required in a ground-based interferometer to cancel the overwhelming laser noise is impossible. The time-delay interferometry method is applied to unequal arm lengths ... |
gr-qc/9512027 | Kenneth Dalton | Kenneth Dalton | Electromagnetism and Gravitation | 20 pages, LaTeX | Hadronic J. 17 (1994) 483-501 | null | null | gr-qc | null | The classical concept of "mass density" is not fundamental to the quantum
theory of matter. Therefore, mass density cannot be the source of gravitation.
Here, we treat electromagnetic energy, momentum, and stress as its source. The
resulting theory predicts that the gravitational potential near any charged
elementary... | [
{
"created": "Tue, 12 Dec 1995 16:30:30 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Mar 1997 19:54:38 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Dalton",
"Kenneth",
""
]
] | The classical concept of "mass density" is not fundamental to the quantum theory of matter. Therefore, mass density cannot be the source of gravitation. Here, we treat electromagnetic energy, momentum, and stress as its source. The resulting theory predicts that the gravitational potential near any charged elementary p... |
1301.7312 | Srijit Bhattacharjee | Srijit Bhattacharjee and Parthasarathi Majumdar | Infrared Issues in Graviton Higgs Theory | Proceedings of Thirteenth Marcel Grossmann Meeting, Stockholm, July,
2012. Based on arXiv:1210.0497 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the one-loop infrared behaviour of the effective potential in
minimally coupled graviton Higgs theory in Minkowski background. The
gravitational analogue of one loop Coleman Weinberg effective potential turns
out to be complex, the imaginary part indicating an infrared instability. This
instability is ... | [
{
"created": "Wed, 30 Jan 2013 18:03:07 GMT",
"version": "v1"
}
] | 2013-01-31 | [
[
"Bhattacharjee",
"Srijit",
""
],
[
"Majumdar",
"Parthasarathi",
""
]
] | We investigate the one-loop infrared behaviour of the effective potential in minimally coupled graviton Higgs theory in Minkowski background. The gravitational analogue of one loop Coleman Weinberg effective potential turns out to be complex, the imaginary part indicating an infrared instability. This instability is tr... |
1309.2960 | Miguel Zilhao | Miguel Zilh\~ao, Scott C. Noble | Dynamic Fisheye Grids for Binary Black Holes Simulations | 35 pages, 13 figures. Matches published version in CQG | 2014 Class. Quantum Grav. 31 065013 | 10.1088/0264-9381/31/6/065013 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new warped gridding scheme adapted to simulating gas dynamics in
binary black hole spacetimes. The grid concentrates grid points in the vicinity
of each black hole to resolve the smaller scale structures there, and rarefies
grid points away from each black hole to keep the overall problem size at a
pract... | [
{
"created": "Wed, 11 Sep 2013 20:32:14 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Feb 2014 19:09:41 GMT",
"version": "v2"
}
] | 2014-03-03 | [
[
"Zilhão",
"Miguel",
""
],
[
"Noble",
"Scott C.",
""
]
] | We present a new warped gridding scheme adapted to simulating gas dynamics in binary black hole spacetimes. The grid concentrates grid points in the vicinity of each black hole to resolve the smaller scale structures there, and rarefies grid points away from each black hole to keep the overall problem size at a practic... |
1512.07187 | Florian Beyer | Florian Beyer and Philippe G. LeFloch | Self-gravitating fluid flows with Gowdy symmetry near cosmological
singularities | 41 pages | Communications in Partial Differential Equations 2017, Vol. 42,
No. 8, 1199-1248 | 10.1080/03605302.2017.1345938 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider self-gravitating fluids in cosmological spacetimes with Gowdy
symmetry on the torus $T^3$ and, in this class, we solve the singular initial
value problem for the Einstein-Euler system of general relativity, when an
initial data set is prescribed on the hypersurface of singularity. We specify
initial condi... | [
{
"created": "Tue, 22 Dec 2015 18:13:49 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Dec 2017 02:06:09 GMT",
"version": "v2"
}
] | 2017-12-11 | [
[
"Beyer",
"Florian",
""
],
[
"LeFloch",
"Philippe G.",
""
]
] | We consider self-gravitating fluids in cosmological spacetimes with Gowdy symmetry on the torus $T^3$ and, in this class, we solve the singular initial value problem for the Einstein-Euler system of general relativity, when an initial data set is prescribed on the hypersurface of singularity. We specify initial conditi... |
2305.14440 | Andrea Placidi PhD | Andrea Placidi, Gianluca Grignani, Troels Harmark, Marta Orselli, Sara
Gliorio, and Alessandro Nagar | 2.5PN accurate waveform information for generic-planar-orbit binaries in
effective one-body models | 14 pages | null | 10.1103/PhysRevD.108.024068 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide the post-Newtonian (PN) waveform for binary systems in motion
along generic planar orbits at 2.5PN accuracy, in terms of the dynamical
variables of the effective one-body (EOB) formalism. In addition to the
calculation of the higher order terms for all the contributions to the waveform
that have been alrea... | [
{
"created": "Tue, 23 May 2023 18:07:03 GMT",
"version": "v1"
},
{
"created": "Mon, 29 May 2023 07:59:59 GMT",
"version": "v2"
},
{
"created": "Thu, 13 Jul 2023 08:11:59 GMT",
"version": "v3"
}
] | 2023-08-09 | [
[
"Placidi",
"Andrea",
""
],
[
"Grignani",
"Gianluca",
""
],
[
"Harmark",
"Troels",
""
],
[
"Orselli",
"Marta",
""
],
[
"Gliorio",
"Sara",
""
],
[
"Nagar",
"Alessandro",
""
]
] | We provide the post-Newtonian (PN) waveform for binary systems in motion along generic planar orbits at 2.5PN accuracy, in terms of the dynamical variables of the effective one-body (EOB) formalism. In addition to the calculation of the higher order terms for all the contributions to the waveform that have been already... |
1707.04116 | Amalaya Khurshudyan | Martiros Khurshudyan, Asatur Khurshudyan | On cosmology of interacting varying polytropic dark fluids | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper a possibility of the accelerated expansion of the large scale
universe with a varying polytropic fluid of a certain type is presented. About
a special role of non-gravitational interactions between dark energy and dark
matter, in particular, about a possibility of improvement and solution of
problems ar... | [
{
"created": "Tue, 4 Jul 2017 18:45:33 GMT",
"version": "v1"
}
] | 2017-07-14 | [
[
"Khurshudyan",
"Martiros",
""
],
[
"Khurshudyan",
"Asatur",
""
]
] | In this paper a possibility of the accelerated expansion of the large scale universe with a varying polytropic fluid of a certain type is presented. About a special role of non-gravitational interactions between dark energy and dark matter, in particular, about a possibility of improvement and solution of problems aris... |
2010.07329 | David Sloan | David Sloan | A New Action for Cosmology | 15 pages | Phys. Rev. D 103, 043524 (2021) | 10.1103/PhysRevD.103.043524 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new action which reproduces the cosmological sector of general
relativity in both the Friedmann-Lemaitre-Robertson-Walker (FLRW) and Bianchi
models. This action makes no reference to the scale factor, and is of a
frictional type first examined by Herglotz. We demonstrate that the
extremization of this ac... | [
{
"created": "Wed, 14 Oct 2020 18:01:30 GMT",
"version": "v1"
}
] | 2021-02-24 | [
[
"Sloan",
"David",
""
]
] | We present a new action which reproduces the cosmological sector of general relativity in both the Friedmann-Lemaitre-Robertson-Walker (FLRW) and Bianchi models. This action makes no reference to the scale factor, and is of a frictional type first examined by Herglotz. We demonstrate that the extremization of this acti... |
1308.6499 | Kai Lin | Jin Li, Hong Ma and Kai Lin | Dirac quasinormal modes in spherically symmetric regular black holes | null | Physical Review D 88, 064001 (2013) | 10.1103/PhysRevD.88.064001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the WKB approximation, massless and massive Dirac quasinormal modes
(QNMs) are studied in spherically symmetric regular spacetimes. We analyze the
relationships between QNM frequencies and the parameters (angular momentum
number $l$, magnetic monopole charge $\beta$ and the mass of the field $m$),
and discuss t... | [
{
"created": "Thu, 29 Aug 2013 15:47:30 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Oct 2013 14:09:58 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Oct 2013 14:40:48 GMT",
"version": "v3"
}
] | 2013-10-11 | [
[
"Li",
"Jin",
""
],
[
"Ma",
"Hong",
""
],
[
"Lin",
"Kai",
""
]
] | Using the WKB approximation, massless and massive Dirac quasinormal modes (QNMs) are studied in spherically symmetric regular spacetimes. We analyze the relationships between QNM frequencies and the parameters (angular momentum number $l$, magnetic monopole charge $\beta$ and the mass of the field $m$), and discuss the... |
2111.06821 | Theo Verwimp | Theo Verwimp | Fibre bundle generated theory of higher dimensional gravity | 8 pages; typos corrected; references updated | Phys. Lett. A 142 (1989) 17 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With the help of Weil polynomials on the Lie algebra of the Poincar\'e group
in D dimensions, we construct a Lagrangian form for higher dimensional gravity
on a principal fibre bundle whose base space is an even-dimensional
Riemann-Cartan spacetime and whose structure group is the Poincar\'e group.
| [
{
"created": "Fri, 12 Nov 2021 17:11:53 GMT",
"version": "v1"
}
] | 2021-11-15 | [
[
"Verwimp",
"Theo",
""
]
] | With the help of Weil polynomials on the Lie algebra of the Poincar\'e group in D dimensions, we construct a Lagrangian form for higher dimensional gravity on a principal fibre bundle whose base space is an even-dimensional Riemann-Cartan spacetime and whose structure group is the Poincar\'e group. |
2008.05715 | Yong-Wan Kim | Soon-Tae Hong, Yong-Wan Kim, Young-Jai Park | Tidal effects in Schwarzschild black hole in holographic massive gravity | 10 pages, 4 figures, version to appear in PLB | null | 10.1016/j.physletb.2020.135967 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate tidal effects produced in the spacetime of Schwarzschild black
hole in holographic massive gravity, which has two additional mass parameters
due to massive gravitons. As a result, we have obtained that massive gravitons
affect the angular component of the tidal force, while the radial component has
the... | [
{
"created": "Thu, 13 Aug 2020 06:33:44 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Nov 2020 07:41:21 GMT",
"version": "v2"
}
] | 2020-11-26 | [
[
"Hong",
"Soon-Tae",
""
],
[
"Kim",
"Yong-Wan",
""
],
[
"Park",
"Young-Jai",
""
]
] | We investigate tidal effects produced in the spacetime of Schwarzschild black hole in holographic massive gravity, which has two additional mass parameters due to massive gravitons. As a result, we have obtained that massive gravitons affect the angular component of the tidal force, while the radial component has the s... |
2012.11999 | Carlos Pe\'on-Nieto | Marc Mars and Carlos Pe\'on-Nieto | Skew-symmetric endomorphisms in $\mathbb{M}^{1,n}$: A unified canonical
form with applications to conformal geometry | 45 pages, 2 figures | null | 10.1088/1361-6382/abf413 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show the existence of families of orthonormal, future directed bases which
allow to cast every skew-symmetric endomorphism of $\mathbb{M}^{1,n}$
($\mathrm{SkewEnd}(\mathbb{M}^{1,n})$) in a single canonical form depending on
a minimal number of parameters. This canonical form is shared by every pair of
elements in ... | [
{
"created": "Tue, 22 Dec 2020 13:40:47 GMT",
"version": "v1"
}
] | 2021-07-07 | [
[
"Mars",
"Marc",
""
],
[
"Peón-Nieto",
"Carlos",
""
]
] | We show the existence of families of orthonormal, future directed bases which allow to cast every skew-symmetric endomorphism of $\mathbb{M}^{1,n}$ ($\mathrm{SkewEnd}(\mathbb{M}^{1,n})$) in a single canonical form depending on a minimal number of parameters. This canonical form is shared by every pair of elements in $\... |
2210.15980 | Sandipan Sengupta | Sandipan Sengupta | A discrete discontinuity between the two phases of gravity | 15 pages, Accepted version (JCAP), Minor revisions in presentation,
Title changed | JCAP11(2023)012 | 10.1088/1475-7516/2023/11/012 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | When tetrad (metric) fields are not invertible, the standard canonical
formulation of gravity cannot be adopted as it is. Here we develop a
Hamiltonian theory of gravity for non-invertible tetrad. In contrast to
Einstein gravity, this phase is found to exhibit three local degrees of
freedom. This reflects a discrete ... | [
{
"created": "Fri, 28 Oct 2022 08:21:23 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Nov 2023 03:39:40 GMT",
"version": "v2"
}
] | 2023-12-13 | [
[
"Sengupta",
"Sandipan",
""
]
] | When tetrad (metric) fields are not invertible, the standard canonical formulation of gravity cannot be adopted as it is. Here we develop a Hamiltonian theory of gravity for non-invertible tetrad. In contrast to Einstein gravity, this phase is found to exhibit three local degrees of freedom. This reflects a discrete di... |
gr-qc/9507026 | Yuri Gusev | Andrei Barvinsky and Yuri Gusev | Heat Kernel and Loop Currents by the Generating Function Method | 12 pages, LaTeX, to appear in: Heat Kernel Techniques and Quantum
Gravity, Discourses in Mathematics and Its Applications, No. 4, ed. by S. A.
Fulling, (Texas A&M University, College Station, Texas, 1995) | null | null | MANIT-11-94 | gr-qc | null | The generating function method is applied to the trace of the heat kernel and
the one-loop effective action derived from the covariant perturbation theory.
The basis of curvature invariants of second order for the heat kernel (Green
function) is built and simple rules for form factor manipulations are proposed.
The r... | [
{
"created": "Wed, 12 Jul 1995 21:16:12 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Barvinsky",
"Andrei",
""
],
[
"Gusev",
"Yuri",
""
]
] | The generating function method is applied to the trace of the heat kernel and the one-loop effective action derived from the covariant perturbation theory. The basis of curvature invariants of second order for the heat kernel (Green function) is built and simple rules for form factor manipulations are proposed. The res... |
1404.1031 | Eric Poisson | Matthew J.S. Beach, Eric Poisson, and Bernhard G. Nickel | Self-force on a charge outside a five-dimensional black hole | 26 pages, 2 figures. Major changes from previous version: the
regularization procedure is now fully justified, and the singular field is
shown to make a contribution to the self-force | null | 10.1103/PhysRevD.89.124014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the electromagnetic self-force acting on a charged particle held
in place at a fixed position r outside a five-dimensional black hole described
by the Schwarzschild-Tangherlini metric. Using a spherical-harmonic
decomposition of the electrostatic potential and a regularization prescription
based on the Had... | [
{
"created": "Thu, 3 Apr 2014 18:14:50 GMT",
"version": "v1"
},
{
"created": "Thu, 22 May 2014 18:22:45 GMT",
"version": "v2"
}
] | 2015-06-19 | [
[
"Beach",
"Matthew J. S.",
""
],
[
"Poisson",
"Eric",
""
],
[
"Nickel",
"Bernhard G.",
""
]
] | We compute the electromagnetic self-force acting on a charged particle held in place at a fixed position r outside a five-dimensional black hole described by the Schwarzschild-Tangherlini metric. Using a spherical-harmonic decomposition of the electrostatic potential and a regularization prescription based on the Hadam... |
2204.13298 | Omar Mustafa | O. Mustafa | PDM Klein-Gordon particles in G\"odel-type Som-Raychaudhuri cosmic
string spacetime background | 10 pages | Eur. Phys. J. Plus 138 (2023) 21 | 10.1140/epjp/s13360-022-03630-6 | null | gr-qc math-ph math.MP | http://creativecommons.org/publicdomain/zero/1.0/ | In G\"odel-type Som-Raychaudhuri (SR) cosmic string spacetime background, we
re-cycle the Klein-Gordon (KG) oscillators and report their correct exact
solutions. We argue that the mathematical collapse of the KG-equation into the
2-dimensional radial Schr\"odinger-like oscillator does not yield that the
parametric ch... | [
{
"created": "Thu, 28 Apr 2022 05:56:59 GMT",
"version": "v1"
}
] | 2023-04-17 | [
[
"Mustafa",
"O.",
""
]
] | In G\"odel-type Som-Raychaudhuri (SR) cosmic string spacetime background, we re-cycle the Klein-Gordon (KG) oscillators and report their correct exact solutions. We argue that the mathematical collapse of the KG-equation into the 2-dimensional radial Schr\"odinger-like oscillator does not yield that the parametric char... |
gr-qc/9305008 | Gerard 't Hooft | Gerard 't Hooft | Canonical Quantization of Gravitating Point Particles in 2+1 Dimensions | 14 pages (TeX), 3 figures (Postscript), Utrecht THU-93/10 | Class.Quant.Grav.10:1653-1664,1993 | 10.1088/0264-9381/10/8/022 | null | gr-qc | null | A formalism previously introduced by the author using tesselated Cauchy
surfaces is applied to define a quantized version of gravitating point
particles in 2+1 dimensions. We observe that this is the first model whose
quantum version automatically discretizes time. But also spacelike distances
are discretized in a ve... | [
{
"created": "Mon, 10 May 1993 10:17:23 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Hooft",
"Gerard 't",
""
]
] | A formalism previously introduced by the author using tesselated Cauchy surfaces is applied to define a quantized version of gravitating point particles in 2+1 dimensions. We observe that this is the first model whose quantum version automatically discretizes time. But also spacelike distances are discretized in a very... |
2005.06231 | Giannis Papagiannopoulos | G. Papagiannopoulos, S. Basilakos, A. Paliathanasis, Supriya Pan and
P. Stavrinos | Dynamics in Varying vacuum Finsler-Randers Cosmology | null | Eur. Phys. J. C 80, 816 (2020) | 10.1140/epjc/s10052-020-8351-6 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of Finsler-Randers theory we consider, for a first time, the
cosmological scenario of the varying vacuum. In particular, we assume the
existence of a cosmological fluid source described by an ideal fluid and the
varying vacuum terms. We determine the cosmological history of this model by
performing a d... | [
{
"created": "Wed, 13 May 2020 09:55:42 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Aug 2020 09:22:26 GMT",
"version": "v2"
}
] | 2020-09-17 | [
[
"Papagiannopoulos",
"G.",
""
],
[
"Basilakos",
"S.",
""
],
[
"Paliathanasis",
"A.",
""
],
[
"Pan",
"Supriya",
""
],
[
"Stavrinos",
"P.",
""
]
] | In the context of Finsler-Randers theory we consider, for a first time, the cosmological scenario of the varying vacuum. In particular, we assume the existence of a cosmological fluid source described by an ideal fluid and the varying vacuum terms. We determine the cosmological history of this model by performing a det... |
1003.1297 | David Edward Bruschi | David Edward Bruschi, Jorma Louko | Charged Unruh effect on geon spacetimes | 3 pages, talk given by David E. Bruschi at the 12th Marcel Grossmann
Meeting | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A topological geon black hole with gauge charges may have a gauge bundle that
necessarily incorporates charge conjugation as a gauge symmetry. This happens
for example for the Reissner-Nordstrom geon. We show that gauging the charge
conjugation leaves an imprint in the Unruh effect: the geon's exterior region
contain... | [
{
"created": "Fri, 5 Mar 2010 16:02:44 GMT",
"version": "v1"
}
] | 2010-03-08 | [
[
"Bruschi",
"David Edward",
""
],
[
"Louko",
"Jorma",
""
]
] | A topological geon black hole with gauge charges may have a gauge bundle that necessarily incorporates charge conjugation as a gauge symmetry. This happens for example for the Reissner-Nordstrom geon. We show that gauging the charge conjugation leaves an imprint in the Unruh effect: the geon's exterior region contains ... |
gr-qc/9907037 | Hongwei Yu | Hongwei Yu and L.H. Ford | Lightcone fluctuations in quantum gravity and extra dimensions | Two additional references added | Phys.Lett. B496 (2000) 107-112 | 10.1016/S0370-2693(00)01287-9 | null | gr-qc astro-ph hep-ph hep-th quant-ph | null | We discuss how compactified extra dimensions may have potentially observable
effects which grow as the compactification scale decreases. This arises because
of lightcone fluctuations in the uncompactified dimensions which can result in
the broadening of the spectral lines from distant sources. We analyze this
effect ... | [
{
"created": "Thu, 8 Jul 1999 19:04:24 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jul 1999 01:27:28 GMT",
"version": "v2"
},
{
"created": "Tue, 31 Oct 2000 01:59:26 GMT",
"version": "v3"
},
{
"created": "Thu, 30 Nov 2000 08:47:46 GMT",
"version": "v4"
}
] | 2009-10-31 | [
[
"Yu",
"Hongwei",
""
],
[
"Ford",
"L. H.",
""
]
] | We discuss how compactified extra dimensions may have potentially observable effects which grow as the compactification scale decreases. This arises because of lightcone fluctuations in the uncompactified dimensions which can result in the broadening of the spectral lines from distant sources. We analyze this effect in... |
1210.0781 | Esmaeil Ebrahimi | A. Sheykhi, E. Ebrahimi, Y. Yosefi | Generalized ghost dark energy in Brans-Dicke theory | 8 Pages, 2figures | Canadian Journal of Physics, 2013, 91(8): 662-667 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was argued that the vacuum energy of the Veneziano ghost field of QCD, in
a time-dependent background, can be written in the general form, $H + O(H^2)$,
where $H$ is the Hubble parameter. Based on this, a phenomenological dark
energy model whose energy density is of the form $\rho=\alpha H+\beta H^{2}$
was recentl... | [
{
"created": "Fri, 14 Sep 2012 10:29:11 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Nov 2012 04:29:10 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Jul 2013 12:47:11 GMT",
"version": "v3"
}
] | 2013-07-24 | [
[
"Sheykhi",
"A.",
""
],
[
"Ebrahimi",
"E.",
""
],
[
"Yosefi",
"Y.",
""
]
] | It was argued that the vacuum energy of the Veneziano ghost field of QCD, in a time-dependent background, can be written in the general form, $H + O(H^2)$, where $H$ is the Hubble parameter. Based on this, a phenomenological dark energy model whose energy density is of the form $\rho=\alpha H+\beta H^{2}$ was recently ... |
2106.08951 | Steen H. Hansen | Steen H. Hansen | A force proportional to velocity squared derived from spacetime algebra | 4 pages, no figure, submitted to MNRAS | null | 10.1093/mnrasl/slab065 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The underlying geometri of spacetime algebra allows one to derive a force by
contracting the relativistic generalization of angular momentum, M, with the
mass-current, mw, where w is a proper 4-vector velocity. By applying this force
to a cosmological object, a repulsive inverse distance-square law is found,
which is... | [
{
"created": "Fri, 11 Jun 2021 12:15:36 GMT",
"version": "v1"
}
] | 2021-06-17 | [
[
"Hansen",
"Steen H.",
""
]
] | The underlying geometri of spacetime algebra allows one to derive a force by contracting the relativistic generalization of angular momentum, M, with the mass-current, mw, where w is a proper 4-vector velocity. By applying this force to a cosmological object, a repulsive inverse distance-square law is found, which is p... |
1512.01798 | Sean Gryb B | Sean Gryb and Karim P. Y. Thebault | Regarding the `Hole Argument' and the `Problem of Time' | 20 pages (+ references) | Philosophy of Science 83, no. 4 (October 2016): 563-584 | 10.1086/687262 | null | gr-qc physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The canonical formalism of general relativity affords a particularly
interesting characterisation of the infamous hole argument. It also provides a
natural formalism in which to relate the hole argument to the problem of time
in classical and quantum gravity. In this paper, we examine the connection
between these two... | [
{
"created": "Sun, 6 Dec 2015 14:56:54 GMT",
"version": "v1"
}
] | 2017-11-15 | [
[
"Gryb",
"Sean",
""
],
[
"Thebault",
"Karim P. Y.",
""
]
] | The canonical formalism of general relativity affords a particularly interesting characterisation of the infamous hole argument. It also provides a natural formalism in which to relate the hole argument to the problem of time in classical and quantum gravity. In this paper, we examine the connection between these two m... |
1811.10629 | Kyriakos Destounis | Kyriakos Destounis | Charged Fermions and Strong Cosmic Censorship | 10 pages, 6 figures, matches version to appear in Physics Letters B | Physics Letters B 795 (2019), 211-219 | 10.1016/j.physletb.2019.06.015 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was recently shown that the Strong Cosmic Censorship conjecture might be
violated for near-extremally-charged black holes in de Sitter space. Here, we
extend our study to charged fermionic fields in the exterior of
Reissner-Nordstr\"{o}m-de Sitter black holes. We identify three families of
modes; one related to th... | [
{
"created": "Mon, 26 Nov 2018 19:00:04 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Dec 2018 20:18:20 GMT",
"version": "v2"
},
{
"created": "Sat, 15 Jun 2019 16:11:03 GMT",
"version": "v3"
}
] | 2019-06-27 | [
[
"Destounis",
"Kyriakos",
""
]
] | It was recently shown that the Strong Cosmic Censorship conjecture might be violated for near-extremally-charged black holes in de Sitter space. Here, we extend our study to charged fermionic fields in the exterior of Reissner-Nordstr\"{o}m-de Sitter black holes. We identify three families of modes; one related to the ... |
1504.01031 | Emil Nissimov | Eduardo Guendelman, Emil Nissimov and Svetlana Pacheva | Vacuum Structure and Gravitational Bags Produced by Metric-Independent
Spacetime Volume-Form Dynamics | 29 pages, 3 figures; v2 added citation | International Journal of Modern Physics A30 (2015) 1550133 (31
pages) | 10.1142/S0217751X1550133X | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new class of gravity-matter-gauge theories in terms of two
different non-Riemannian volume-forms independent of the Riemannian metric. The
nonlinear gauge field system contains a square-root $\sqrt{-F^2}$ of the
standard Maxwell Lagrangian which is known to describe charge confinement in
flat spacetime. ... | [
{
"created": "Sat, 4 Apr 2015 17:48:58 GMT",
"version": "v1"
},
{
"created": "Fri, 29 May 2015 20:39:57 GMT",
"version": "v2"
}
] | 2015-07-23 | [
[
"Guendelman",
"Eduardo",
""
],
[
"Nissimov",
"Emil",
""
],
[
"Pacheva",
"Svetlana",
""
]
] | We propose a new class of gravity-matter-gauge theories in terms of two different non-Riemannian volume-forms independent of the Riemannian metric. The nonlinear gauge field system contains a square-root $\sqrt{-F^2}$ of the standard Maxwell Lagrangian which is known to describe charge confinement in flat spacetime. In... |
1209.0611 | Mathieu Beau | Mathieu Beau (STP-DIAS) | Th\'eorie des champs des contraintes et d\'eformations en relativit\'e
g\'en\'erale et expansion cosmologique: Theory of stress and strain fields in
general relativity and cosmological expansion | In French. English version will be written soon !! Comment and
suggestion are more than welcome | null | null | null | gr-qc physics.gen-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we propose to add stress-energy tensor to the Einstein
equations, assuming that the matter-energy and the metric space-time is nothing
but a continuous medium with some elastic properties. We first give a general
expression of the stress tensor which is linearly related to the strain tensor.
Then, we ... | [
{
"created": "Tue, 4 Sep 2012 11:32:40 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Sep 2014 18:27:48 GMT",
"version": "v2"
}
] | 2014-09-29 | [
[
"Beau",
"Mathieu",
"",
"STP-DIAS"
]
] | In this article we propose to add stress-energy tensor to the Einstein equations, assuming that the matter-energy and the metric space-time is nothing but a continuous medium with some elastic properties. We first give a general expression of the stress tensor which is linearly related to the strain tensor. Then, we gi... |
2109.04163 | Steven Balbus | Steven A. Balbus | A Poynting theorem formulation for the gravitational wave stress pseudo
tensor | 8 pages, no figures. To appear in International Journal of Modern
Physics D | null | 10.1142/S0218271821420037 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | A very simple and physical derivation of the conservation equation for the
propagation of gravitational radiation is presented. The formulation is exact.
The result takes the readily recognisable and intuitive form of a
Poynting-style equation, in which the outward propagation of stress-energy is
directly related to ... | [
{
"created": "Thu, 9 Sep 2021 10:48:29 GMT",
"version": "v1"
}
] | 2022-01-26 | [
[
"Balbus",
"Steven A.",
""
]
] | A very simple and physical derivation of the conservation equation for the propagation of gravitational radiation is presented. The formulation is exact. The result takes the readily recognisable and intuitive form of a Poynting-style equation, in which the outward propagation of stress-energy is directly related to th... |
1005.0634 | Delphine Perrodin | Delphine L. Perrodin | Subleading Spin-Orbit Correction to the Newtonian Potential in Effective
Field Theory Formalism | 4 pages, submitted to Proceedings of 12th Marcel Grossmann Meeting,
added more detail and corrected expression for the potential | null | 10.1142/9789814374552_0041 | null | gr-qc astro-ph.CO astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the gravitational dynamics in the early inspiral phase of coalescing
compact binaries using Non-Relativistic General Relativity (NRGR) - an
effective field theory formalism based on the post-newtonian expansion, but
which provides a consistent lagrangian framework and a systematic way in which
to study binar... | [
{
"created": "Tue, 4 May 2010 20:45:34 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Jun 2010 19:43:54 GMT",
"version": "v2"
}
] | 2016-11-15 | [
[
"Perrodin",
"Delphine L.",
""
]
] | We study the gravitational dynamics in the early inspiral phase of coalescing compact binaries using Non-Relativistic General Relativity (NRGR) - an effective field theory formalism based on the post-newtonian expansion, but which provides a consistent lagrangian framework and a systematic way in which to study binary ... |
1312.2634 | Kuniyasu Masashi | M.Kuniyasu | A New 2+1 Dimensional Gravity Solution Coupled to Non Linear
Electrodynamics with a Cosmological Constant | 9pages, 2figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A solution for the Einstein gravity coupled with non linear electrodynamics
is introduced in 2+1 dimensions. Especially, in the case with a non-vanishing
cosmological constant, we obtain a novel black hole solution. To find
fundamental characters of the solution, radial null rays in the space-time
described by the so... | [
{
"created": "Tue, 10 Dec 2013 00:46:35 GMT",
"version": "v1"
}
] | 2013-12-11 | [
[
"Kuniyasu",
"M.",
""
]
] | A solution for the Einstein gravity coupled with non linear electrodynamics is introduced in 2+1 dimensions. Especially, in the case with a non-vanishing cosmological constant, we obtain a novel black hole solution. To find fundamental characters of the solution, radial null rays in the space-time described by the solu... |
gr-qc/0204006 | Thomas T. Bringley | Thomas T. Bringley | Energy and Momentum of a Stationary Beam of Light | Accepted for Publication in Modern Physics Letters A | Mod.Phys.Lett. A17 (2002) 157-162 | 10.1142/S0217732302006199 | null | gr-qc | null | The energy-momentum complexes of Einstein, Landau-Lifshitz, Papapetrou, and
Weinberg give the same and meaningful results for the energy and momentum of
the Bonnor spacetime describing the gravitational field of a stationary beam of
light. The results support the Cooperstock hypothesis.
| [
{
"created": "Tue, 2 Apr 2002 04:56:12 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Bringley",
"Thomas T.",
""
]
] | The energy-momentum complexes of Einstein, Landau-Lifshitz, Papapetrou, and Weinberg give the same and meaningful results for the energy and momentum of the Bonnor spacetime describing the gravitational field of a stationary beam of light. The results support the Cooperstock hypothesis. |
2312.02280 | Jo\~ao Novo | Yves Brihaye and Carlos Herdeiro and Jo\~ao P. A. Novo and Eugen Radu | Kaluza-Klein monopole with scalar hair | null | null | null | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We construct a new family of rotating black holes with scalar hair and a
regular horizon of spherical topology, within five dimensional ($d=5$)
Einstein's gravity minimally coupled to a complex, massive scalar field
doublet. These solutions represent generalizations of the Kaluza-Klein monopole
found by Gross, Perry ... | [
{
"created": "Mon, 4 Dec 2023 19:00:51 GMT",
"version": "v1"
}
] | 2023-12-06 | [
[
"Brihaye",
"Yves",
""
],
[
"Herdeiro",
"Carlos",
""
],
[
"Novo",
"João P. A.",
""
],
[
"Radu",
"Eugen",
""
]
] | We construct a new family of rotating black holes with scalar hair and a regular horizon of spherical topology, within five dimensional ($d=5$) Einstein's gravity minimally coupled to a complex, massive scalar field doublet. These solutions represent generalizations of the Kaluza-Klein monopole found by Gross, Perry an... |
1005.1878 | Alexander Kamenshchik | F. Cannata and A.Yu. Kamenshchik | Chameleon Cosmology Model Describing the Phantom Divide Line Crossing | 9 pages | Int.J.Mod.Phys.D20:121-131,2011 | 10.1142/S0218271811018755 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An exact solution describing the evolution of the type Bang-to-Rip with the
phantom divide line crossing is constructed in the Chameleon cosmology model,
based on two independent functions of the scalar field.
| [
{
"created": "Tue, 11 May 2010 16:11:50 GMT",
"version": "v1"
}
] | 2011-03-02 | [
[
"Cannata",
"F.",
""
],
[
"Kamenshchik",
"A. Yu.",
""
]
] | An exact solution describing the evolution of the type Bang-to-Rip with the phantom divide line crossing is constructed in the Chameleon cosmology model, based on two independent functions of the scalar field. |
1601.07893 | Elias C. Vagenas | Soumen Deb, Saurya Das, Elias C. Vagenas | Discreteness of Space from GUP in a Weak Gravitational Field | v1: 8 pages, revtex4, 1 figure, to appear in Phys. Lett. B, v2: minor
typos corrected to match published version | Phys. Lett. B 755 (2016) 17 | 10.1016/j.physletb.2016.01.059 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravity effects modify the Heisenberg's uncertainty principle to a
generalized uncertainty principle (GUP). Earlier work showed that the
GUP-induced corrections to the Schr\"odinger equation, when applied to a
non-relativistic particle in a one-dimensional box, led to the quantization of
length. Similarly, co... | [
{
"created": "Thu, 28 Jan 2016 20:40:08 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Feb 2016 05:58:34 GMT",
"version": "v2"
}
] | 2016-02-04 | [
[
"Deb",
"Soumen",
""
],
[
"Das",
"Saurya",
""
],
[
"Vagenas",
"Elias C.",
""
]
] | Quantum gravity effects modify the Heisenberg's uncertainty principle to a generalized uncertainty principle (GUP). Earlier work showed that the GUP-induced corrections to the Schr\"odinger equation, when applied to a non-relativistic particle in a one-dimensional box, led to the quantization of length. Similarly, corr... |
1912.08289 | Nigel Bishop | Nigel T. Bishop and Petrus J. van der Walt and Monos Naidoo | Effect of a low density dust shell on the propagation of gravitational
waves | null | Gen. Rel. Grav., 52:92 (2020) | 10.1007/s10714-020-02740-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the Bondi-Sachs formalism, the problem of a gravitational wave source
surrounded by a spherical dust shell is considered. Using linearized
perturbation theory, the geometry is found in the regions: in the shell,
exterior to the shell, and interior to the shell. It is found that the dust
shell causes the gravita... | [
{
"created": "Tue, 17 Dec 2019 21:57:01 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Sep 2020 09:27:04 GMT",
"version": "v2"
}
] | 2020-09-29 | [
[
"Bishop",
"Nigel T.",
""
],
[
"van der Walt",
"Petrus J.",
""
],
[
"Naidoo",
"Monos",
""
]
] | Using the Bondi-Sachs formalism, the problem of a gravitational wave source surrounded by a spherical dust shell is considered. Using linearized perturbation theory, the geometry is found in the regions: in the shell, exterior to the shell, and interior to the shell. It is found that the dust shell causes the gravitati... |
1703.09755 | Alberto Molgado | Jasel Berra-Montiel, Alberto Molgado, David Serrano-Blanco | De Donder-Weyl Hamiltonian formalism of MacDowell-Mansouri gravity | 14 pages, no figures, published version | Class. Quantum Grav. 34 (2017) 235002 | 10.1088/1361-6382/aa924a | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the behaviour of the MacDowell-Mansouri action with internal
symmetry group $\mathrm{SO}(4,1)$ under the covariant Hamiltonian formulation.
The field equations, known in this formalism as the De Donder-Weyl equations,
are obtained by means of the graded Poisson-Gerstenhaber bracket structure
present within... | [
{
"created": "Tue, 28 Mar 2017 19:15:08 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Mar 2019 15:00:25 GMT",
"version": "v2"
}
] | 2019-03-07 | [
[
"Berra-Montiel",
"Jasel",
""
],
[
"Molgado",
"Alberto",
""
],
[
"Serrano-Blanco",
"David",
""
]
] | We analyse the behaviour of the MacDowell-Mansouri action with internal symmetry group $\mathrm{SO}(4,1)$ under the covariant Hamiltonian formulation. The field equations, known in this formalism as the De Donder-Weyl equations, are obtained by means of the graded Poisson-Gerstenhaber bracket structure present within t... |
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