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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0701153 | Alberto Saa | Alberto Saa | N-dimensional Vaidya metric with cosmological constant in double-null
coordinates | 11 pages, 5 figs. Final version to appear in PRD | Phys.Rev.D75:124019,2007 | 10.1103/PhysRevD.75.124019 | null | gr-qc | null | A recently proposed approach to the construction of the Vaidya metric in
double-null coordinates for generic mass functions is extended to the
$n$-dimensional $(n>2)$ case and to allow the inclusion of a cosmological
constant. The approach is based on a qualitative study of the null-geodesics,
allowing the descriptio... | [
{
"created": "Mon, 29 Jan 2007 02:26:57 GMT",
"version": "v1"
},
{
"created": "Fri, 25 May 2007 13:27:21 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Saa",
"Alberto",
""
]
] | A recently proposed approach to the construction of the Vaidya metric in double-null coordinates for generic mass functions is extended to the $n$-dimensional $(n>2)$ case and to allow the inclusion of a cosmological constant. The approach is based on a qualitative study of the null-geodesics, allowing the description ... |
1309.4424 | Sanved Kolekar | Sanved Kolekar and T. Padmanabhan | Quantum field theory in the Rindler-Rindler spacetime | v1: 12 pages, no figure, v2: typo fixed in eq.39 | Phys. Rev. D 89, 064055 (2014) | 10.1103/PhysRevD.89.064055 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that Minkowski vacuum appears as a thermal bath in the
Rindler spacetime when the modes on the left wedge are traced out. We introduce
the concept of a Rindler-Rindler spacetime, obtained by a further coordinate
transformation from the Rindler spacetime, in a manner similar to the
transformation from... | [
{
"created": "Tue, 17 Sep 2013 18:49:45 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jun 2018 14:50:27 GMT",
"version": "v2"
}
] | 2018-06-20 | [
[
"Kolekar",
"Sanved",
""
],
[
"Padmanabhan",
"T.",
""
]
] | It is well known that Minkowski vacuum appears as a thermal bath in the Rindler spacetime when the modes on the left wedge are traced out. We introduce the concept of a Rindler-Rindler spacetime, obtained by a further coordinate transformation from the Rindler spacetime, in a manner similar to the transformation from i... |
1308.0860 | Mart\'in G. Richarte MR | Luis P. Chimento and Mart\'in G. Richarte | Nonbaryonic dark matter and scalar field coupled with a transversal
interaction plus decoupled radiation | 12 pages plus 5 pages of figures. In order to see the figures go to
the journal website
(http://link.springer.com/article/10.1140%2Fepjc%2Fs10052-013-2497-4). arXiv
admin note: substantial text overlap with arXiv:1303.3356, arXiv:1210.5505 | The European Physical Journal C July 2013, 73:2497 | 10.1140/epjc/s10052-013-2497-4 | null | gr-qc astro-ph.CO hep-ph hep-th physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze a universe filled with interacting dark matter, a scalar field
accommodated as dark radiation along with dark energy plus a decoupled
radiation term within the framework of spatially flat
Friedmann-Robertson-Walker (FRW) spacetime. We work in a three-dimensional
internal space spanned by the interaction ve... | [
{
"created": "Mon, 5 Aug 2013 00:05:13 GMT",
"version": "v1"
}
] | 2013-08-06 | [
[
"Chimento",
"Luis P.",
""
],
[
"Richarte",
"Martín G.",
""
]
] | We analyze a universe filled with interacting dark matter, a scalar field accommodated as dark radiation along with dark energy plus a decoupled radiation term within the framework of spatially flat Friedmann-Robertson-Walker (FRW) spacetime. We work in a three-dimensional internal space spanned by the interaction vect... |
gr-qc/0303111 | Ettore Minguzzi | E. Minguzzi | On the existence of maximizing curves for the charged-particle action | AMSLatex, 6 pages | Class.Quant.Grav. 20 (2003) 4169-4175 | 10.1088/0264-9381/20/19/303 | null | gr-qc | null | The classical Avez-Seifert theorem is generalized to the case of the Lorentz
force equation for charged test particles with fixed charge-to-mass ratio.
Given two events x_{0} and x_{1}, with x_{1} in the chronological future of
x_{0}, and a ratio q/m, it is proved that a timelike connecting solution of the
Lorentz fo... | [
{
"created": "Fri, 28 Mar 2003 14:24:48 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Mar 2003 13:26:29 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Minguzzi",
"E.",
""
]
] | The classical Avez-Seifert theorem is generalized to the case of the Lorentz force equation for charged test particles with fixed charge-to-mass ratio. Given two events x_{0} and x_{1}, with x_{1} in the chronological future of x_{0}, and a ratio q/m, it is proved that a timelike connecting solution of the Lorentz forc... |
gr-qc/0512001 | Peter Diener | Peter Diener, Ernst Nils Dorband, Erik Schnetter, Manuel Tiglio | New, efficient, and accurate high order derivative and dissipation
operators satisfying summation by parts, and applications in
three-dimensional multi-block evolutions | 16 pages, 9 figures. The files with the coefficients for the
derivative and dissipation operators can be accessed by downloading the
source code for the document. The files are located in the "coeffs"
subdirectory | J.Sci.Comput.32:109-145,2007 | 10.1007/s10915-006-9123-7 | LSU-REL-113005, AEI-2005-175 | gr-qc | null | We construct new, efficient, and accurate high-order finite differencing
operators which satisfy summation by parts. Since these operators are not
uniquely defined, we consider several optimization criteria: minimizing the
bandwidth, the truncation error on the boundary points, the spectral radius, or
a combination o... | [
{
"created": "Wed, 30 Nov 2005 22:07:28 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Diener",
"Peter",
""
],
[
"Dorband",
"Ernst Nils",
""
],
[
"Schnetter",
"Erik",
""
],
[
"Tiglio",
"Manuel",
""
]
] | We construct new, efficient, and accurate high-order finite differencing operators which satisfy summation by parts. Since these operators are not uniquely defined, we consider several optimization criteria: minimizing the bandwidth, the truncation error on the boundary points, the spectral radius, or a combination of ... |
2011.11568 | Diego S\'aez-Chill\'on G\'omez | Diego S\'aez-Chill\'on G\'omez | Variational principle and boundary terms in gravity \`a la Palatini | 5 pages, version to be published in PLB | Phys. Lett. B 814, 136103 (2021) | 10.1016/j.physletb.2021.136103 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general $f(\mathcal{R})$ gravitational theory is considered within the
Palatini formalism. By applying the variational principle and the usual
conditions on the boundary, we show explicitly that a surface term remains such
that as in their metric-compatible counterparts, an additional surface term has
to be added i... | [
{
"created": "Mon, 23 Nov 2020 17:27:30 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Jan 2021 09:50:12 GMT",
"version": "v2"
}
] | 2021-02-02 | [
[
"Gómez",
"Diego Sáez-Chillón",
""
]
] | A general $f(\mathcal{R})$ gravitational theory is considered within the Palatini formalism. By applying the variational principle and the usual conditions on the boundary, we show explicitly that a surface term remains such that as in their metric-compatible counterparts, an additional surface term has to be added in ... |
gr-qc/9710073 | Hisaaki Shinkai | Hisa-aki Shinkai, Wai-Mo Suen, F.Douglas Swesty, Malcolm Tobias,
Edward Y.M. Wang and Clifford M. Will | Newtonian and post-Newtonian binary neutron star mergers | 3 pages, LaTeX, 2 figures, Proceedings of the 8th Marcel Grossmann
Meeting, Jerusalem, June 1997 (World Scientific); mprocl.sty and epsf.sty are
included | null | null | null | gr-qc | null | We present two of our efforts directed toward the numerical analysis of
neutron star mergers, which are the most plausible sources for gravitational
wave detectors that should begin operating in the near future. First we present
Newtonian 3D simulations including radiation reaction (2.5PN) effects. We
discuss the gra... | [
{
"created": "Tue, 14 Oct 1997 20:19:46 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Shinkai",
"Hisa-aki",
""
],
[
"Suen",
"Wai-Mo",
""
],
[
"Swesty",
"F. Douglas",
""
],
[
"Tobias",
"Malcolm",
""
],
[
"Wang",
"Edward Y. M.",
""
],
[
"Will",
"Clifford M.",
""
]
] | We present two of our efforts directed toward the numerical analysis of neutron star mergers, which are the most plausible sources for gravitational wave detectors that should begin operating in the near future. First we present Newtonian 3D simulations including radiation reaction (2.5PN) effects. We discuss the gravi... |
0802.3362 | Israel Quiros | Israel Quiros, Ricardo Garcia-Salcedo, Tonatiuh Matos, Claudia Moreno | Self accelerating solutions in a DGP brane with a scalar field trapped
on it: the dynamical systems perspective | 9 pages, 8 figures. Version that matches the one published by PLB | Phys.Lett.B670:259-265,2009 | 10.1016/j.physletb.2008.11.019 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the dynamical systems tools to study the linear dynamics of a
self-interacting scalar field trapped on a DGP brane. The simplest kinds of
self-interaction potentials are investigated: a) constant potential, and b)
exponential potential. It is shown that the dynamics of DGP models can be very
rich and complex... | [
{
"created": "Fri, 22 Feb 2008 18:51:38 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Feb 2008 18:27:25 GMT",
"version": "v2"
},
{
"created": "Tue, 9 Dec 2008 16:06:45 GMT",
"version": "v3"
}
] | 2009-02-16 | [
[
"Quiros",
"Israel",
""
],
[
"Garcia-Salcedo",
"Ricardo",
""
],
[
"Matos",
"Tonatiuh",
""
],
[
"Moreno",
"Claudia",
""
]
] | We apply the dynamical systems tools to study the linear dynamics of a self-interacting scalar field trapped on a DGP brane. The simplest kinds of self-interaction potentials are investigated: a) constant potential, and b) exponential potential. It is shown that the dynamics of DGP models can be very rich and complex. ... |
2108.01472 | Gabriel R. Bengochea | Gabriel R. Bengochea, Mar\'ia P\'ia Piccirilli, Gabriel Le\'on | Emergent universe revisited through the CSL theory | 15 pages, 5 figures. Some references added. Version accepted in EPJC | Eur. Phys. J. C 81, 1049 (2021) | 10.1140/epjc/s10052-021-09842-x | null | gr-qc astro-ph.CO quant-ph | http://creativecommons.org/licenses/by/4.0/ | In this work we analyze how the spectrum of primordial scalar perturbations
is modified, within the emergent universe scenario, when a particular version
of the Continuous Spontaneous Localization (CSL) model is incorporated as the
generating mechanism of initial perturbations, providing also an explanation to
the qu... | [
{
"created": "Mon, 2 Aug 2021 13:38:04 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Dec 2021 16:18:11 GMT",
"version": "v2"
}
] | 2021-12-03 | [
[
"Bengochea",
"Gabriel R.",
""
],
[
"Piccirilli",
"María Pía",
""
],
[
"León",
"Gabriel",
""
]
] | In this work we analyze how the spectrum of primordial scalar perturbations is modified, within the emergent universe scenario, when a particular version of the Continuous Spontaneous Localization (CSL) model is incorporated as the generating mechanism of initial perturbations, providing also an explanation to the quan... |
0903.3475 | Etera R. Livine | Florian Girelli, Etera R. Livine, Daniele Oriti | 4d Deformed Special Relativity from Group Field Theories | 23 pages | Phys.Rev.D81:024015,2010 | 10.1103/PhysRevD.81.024015 | ITP-UU-08/57, SPIN-08/44, AEI-2009-029 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a scalar field theory of the deformed special relativity type,
living on non-commutative kappa-Minkowski spacetime and with a kappa-deformed
Poincare symmetry, from the SO(4,1) group field theory defining the transition
amplitudes for topological BF-theory in 4 space-time dimensions. This is done
at a non-p... | [
{
"created": "Fri, 20 Mar 2009 09:25:40 GMT",
"version": "v1"
}
] | 2010-03-12 | [
[
"Girelli",
"Florian",
""
],
[
"Livine",
"Etera R.",
""
],
[
"Oriti",
"Daniele",
""
]
] | We derive a scalar field theory of the deformed special relativity type, living on non-commutative kappa-Minkowski spacetime and with a kappa-deformed Poincare symmetry, from the SO(4,1) group field theory defining the transition amplitudes for topological BF-theory in 4 space-time dimensions. This is done at a non-per... |
1403.2231 | T. P. Singh | Anushrut Sharma and Tejinder P. Singh | A possible correspondence between Ricci identities and Dirac equations
in the Newman-Penrose formalism: towards an understanding of gravity induced
collapse of the wave-function? | v2. 30 pages. Additional discussion in Sections IV and V. References
added. To appear in Gen. Rel. Grav | null | 10.1007/s10714-014-1821-0 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well-known that in the Newman-Penrose formalism the Riemann tensor can
be expressed as a set of eighteen complex first-order equations, in terms of
the twelve spin coefficients, known as Ricci identities. The Ricci tensor
herein is determined via the Einstein equations. It is also known that the
Dirac equation ... | [
{
"created": "Mon, 10 Mar 2014 12:58:57 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Oct 2014 17:02:59 GMT",
"version": "v2"
}
] | 2015-06-19 | [
[
"Sharma",
"Anushrut",
""
],
[
"Singh",
"Tejinder P.",
""
]
] | It is well-known that in the Newman-Penrose formalism the Riemann tensor can be expressed as a set of eighteen complex first-order equations, in terms of the twelve spin coefficients, known as Ricci identities. The Ricci tensor herein is determined via the Einstein equations. It is also known that the Dirac equation in... |
2106.00035 | Leonhard Kehrberger | Leonhard M. A. Kehrberger | The Case Against Smooth Null Infinity III: Early-Time Asymptotics for
Higher $\ell$-Modes of Linear Waves on a Schwarzschild Background | 100 pages, 6 figures. v3: Comments by reviewer worked in. v4:
correction to Figure 6, v5: Fixed typesetting error added in v4 | Annals of PDE 8, 12 (2022) | 10.1007/s40818-022-00129-2 | null | gr-qc hep-th math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we derive the early-time asymptotics for fixed-frequency
solutions $\phi_\ell$ to the wave equation $\Box_g \phi_\ell=0$ on a fixed
Schwarzschild background ($M>0$) arising from the no incoming radiation
condition on $\mathcal I^-$ and polynomially decaying data, $r\phi_\ell\sim
t^{-1}$ as $t\to-\infty... | [
{
"created": "Mon, 31 May 2021 18:03:47 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Jul 2021 17:43:58 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Jun 2022 13:06:15 GMT",
"version": "v3"
},
{
"created": "Fri, 29 Sep 2023 09:30:27 GMT",
"version": "v4"
},
{
"cr... | 2024-04-30 | [
[
"Kehrberger",
"Leonhard M. A.",
""
]
] | In this paper, we derive the early-time asymptotics for fixed-frequency solutions $\phi_\ell$ to the wave equation $\Box_g \phi_\ell=0$ on a fixed Schwarzschild background ($M>0$) arising from the no incoming radiation condition on $\mathcal I^-$ and polynomially decaying data, $r\phi_\ell\sim t^{-1}$ as $t\to-\infty$,... |
gr-qc/9903069 | Roberto Casadio | R. Casadio and B. Harms | Testing string theory via black hole space-times | 12 pages, 4 figures, to appear in the proceedings of the 19th Texas
Symposium, Paris, 14-18 Dec 1998 | null | null | UAHEP 992 | gr-qc | null | Charged black holes, both spherically symmetric and rotating, in the low
energy limit of string theory (Einstein-Maxwell-dilaton theory) are compared to
analogous geometries in pure general relativity. We describe various physical
differences and investigate some experiments which can distinguish between the
two theo... | [
{
"created": "Thu, 18 Mar 1999 09:51:49 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Casadio",
"R.",
""
],
[
"Harms",
"B.",
""
]
] | Charged black holes, both spherically symmetric and rotating, in the low energy limit of string theory (Einstein-Maxwell-dilaton theory) are compared to analogous geometries in pure general relativity. We describe various physical differences and investigate some experiments which can distinguish between the two theori... |
1505.06760 | Ichiro Oda | Ichiro Oda | Conformal Higgs Gravity | 11 pages | null | null | DPUR/TH/45 | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a model of conformal gravity with Higgs field. This model has a
positive Newton's constant and exhibits a novel symmetry breaking mechanism of
gauge symmetries. A possible application to cosmology is briefly mentioned.
| [
{
"created": "Mon, 25 May 2015 21:25:16 GMT",
"version": "v1"
}
] | 2015-05-27 | [
[
"Oda",
"Ichiro",
""
]
] | We construct a model of conformal gravity with Higgs field. This model has a positive Newton's constant and exhibits a novel symmetry breaking mechanism of gauge symmetries. A possible application to cosmology is briefly mentioned. |
2212.09485 | Hossein Ghaffarnejad | Hossein Ghaffarnejad and Leyla Naderi | Modified Gauge Invariant Einstein Maxwell Gravity and Stability of
Spherical perfect fluid Stars with Magnetic Monopoles | 26 pages, 4 figures, presented as virtual in the 7th Gravity and
Particles Meeting of Northeast Iran, 14-15 Desember 2022, Shahrood University
of Technology
https://www.hsu.ac.ir/wp-content/uploads/2022/12/poster_221206_195327-1.jpg | Iranian Journal of Astronomy & Astrophysics 2024 | 10.22128/ijaa.2024.759.1175 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As an alternative gravity model we consider an extended Einstein-Maxwell
gravity containing a gauge invariance property. Extension is assumed to be
addition of a directional coupling between spatial electromagnetic fields with
the Ricci tensor. We will see importance of the additional term in making a
compact stellar... | [
{
"created": "Mon, 19 Dec 2022 14:42:00 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Feb 2023 18:37:20 GMT",
"version": "v2"
},
{
"created": "Fri, 5 Jan 2024 07:19:55 GMT",
"version": "v3"
}
] | 2024-01-08 | [
[
"Ghaffarnejad",
"Hossein",
""
],
[
"Naderi",
"Leyla",
""
]
] | As an alternative gravity model we consider an extended Einstein-Maxwell gravity containing a gauge invariance property. Extension is assumed to be addition of a directional coupling between spatial electromagnetic fields with the Ricci tensor. We will see importance of the additional term in making a compact stellar o... |
2301.07675 | Jessica Lawrence | Jessica Lawrence, Kevin Turbang, Andrew Matas, Arianna I. Renzini,
Nick van Remortel, Joseph D. Romano | A stochastic search for intermittent gravitational-wave backgrounds | 23 pages, 8 figures, 1 table | null | 10.1103/PhysRevD.107.103026 | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | A likely source of a gravitational-wave background (GWB) in the frequency
band of the Advanced LIGO, Virgo and KAGRA detectors is the superposition of
signals from the population of unresolvable stellar-mass binary-black-hole
(BBH) mergers throughout the Universe. Since the duration of a BBH merger in
band ($\sim\!1~... | [
{
"created": "Wed, 18 Jan 2023 17:52:33 GMT",
"version": "v1"
}
] | 2023-05-24 | [
[
"Lawrence",
"Jessica",
""
],
[
"Turbang",
"Kevin",
""
],
[
"Matas",
"Andrew",
""
],
[
"Renzini",
"Arianna I.",
""
],
[
"van Remortel",
"Nick",
""
],
[
"Romano",
"Joseph D.",
""
]
] | A likely source of a gravitational-wave background (GWB) in the frequency band of the Advanced LIGO, Virgo and KAGRA detectors is the superposition of signals from the population of unresolvable stellar-mass binary-black-hole (BBH) mergers throughout the Universe. Since the duration of a BBH merger in band ($\sim\!1~{\... |
2405.18640 | Lorenzo Gavassino | Lorenzo Gavassino | Life on a closed timelike curve | 8 pages, 3 figures, comments welcome! | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the internal dynamics of a hypothetical spaceship traveling on a
close timelike curve in a G\"{o}del-type universe. We choose the curve so that
the generator of evolution in proper time is the angular momentum. Using
Wigner's theorem, we prove that the energy levels internal to the spaceship
must undergo spo... | [
{
"created": "Tue, 28 May 2024 22:51:54 GMT",
"version": "v1"
}
] | 2024-05-30 | [
[
"Gavassino",
"Lorenzo",
""
]
] | We study the internal dynamics of a hypothetical spaceship traveling on a close timelike curve in a G\"{o}del-type universe. We choose the curve so that the generator of evolution in proper time is the angular momentum. Using Wigner's theorem, we prove that the energy levels internal to the spaceship must undergo spont... |
2208.05436 | Jose M. M. Senovilla | Jos\'e M. M. Senovilla | Gravitational radiation at infinity with non-negative cosmological
constant | 56 pages, 6 figures. Invited paper to the `Universe' Special Issue
"Gravitational Radiation in Cosmological Spacetimes" | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The existence of gravitational radiation arriving at null infinity -- i.e.
escaping from the physical system -- is addressed in the presence of a
non-negative cosmological constant $\Lambda\geq 0$. The case with vanishing
$\Lambda$ is well understood and relies on the properties of the News tensor
field (or the News ... | [
{
"created": "Wed, 10 Aug 2022 16:50:14 GMT",
"version": "v1"
}
] | 2022-08-11 | [
[
"Senovilla",
"José M. M.",
""
]
] | The existence of gravitational radiation arriving at null infinity -- i.e. escaping from the physical system -- is addressed in the presence of a non-negative cosmological constant $\Lambda\geq 0$. The case with vanishing $\Lambda$ is well understood and relies on the properties of the News tensor field (or the News fu... |
2009.08163 | Christopher Straub | Sebastian G\"unther, Jacob K\"orner, Timo Lebeda, Bastian P\"otzl,
Gerhard Rein, Christopher Straub, J\"org Weber | A numerical stability analysis for the Einstein-Vlasov system | 35 pages, 12 figures | Classical Quantum Gravity 38, 035003 (2021) | 10.1088/1361-6382/abcbdf | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate stability issues for steady states of the spherically
symmetric Einstein-Vlasov system numerically in Schwarzschild, maximal areal,
and Eddington-Finkelstein coordinates. Across all coordinate systems we confirm
the conjecture that the first binding energy maximum along a one-parameter
family of steady... | [
{
"created": "Thu, 17 Sep 2020 09:17:11 GMT",
"version": "v1"
}
] | 2022-04-27 | [
[
"Günther",
"Sebastian",
""
],
[
"Körner",
"Jacob",
""
],
[
"Lebeda",
"Timo",
""
],
[
"Pötzl",
"Bastian",
""
],
[
"Rein",
"Gerhard",
""
],
[
"Straub",
"Christopher",
""
],
[
"Weber",
"Jörg",
""
]
] | We investigate stability issues for steady states of the spherically symmetric Einstein-Vlasov system numerically in Schwarzschild, maximal areal, and Eddington-Finkelstein coordinates. Across all coordinate systems we confirm the conjecture that the first binding energy maximum along a one-parameter family of steady s... |
2406.14982 | Naoki Yoshioka | Tomohiro Inagaki, Naoki Yoshioka | Non-thermal particle production in Einstein-Cartan gravity with modified
Holst term and non-minimal couplings | null | null | null | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | Non-thermal fermionic particle production is investigated in Einstein-Cartan
modified gravity with a modified Holst term and non-minimal couplings between
the spin connection and a fermion. By using the auxiliary field method, the
theory is rewritten into a pseudoscalar-tensor theory with Einstein-Hilbert
action and ... | [
{
"created": "Fri, 21 Jun 2024 08:46:34 GMT",
"version": "v1"
}
] | 2024-06-24 | [
[
"Inagaki",
"Tomohiro",
""
],
[
"Yoshioka",
"Naoki",
""
]
] | Non-thermal fermionic particle production is investigated in Einstein-Cartan modified gravity with a modified Holst term and non-minimal couplings between the spin connection and a fermion. By using the auxiliary field method, the theory is rewritten into a pseudoscalar-tensor theory with Einstein-Hilbert action and ca... |
gr-qc/9711019 | Perjes Zoltan | Mattias Marklund (Ume{\aa} University), Gyula Fodor, Zolt\'an Perj\'es
(KFKI Research Institute for Particle and Nuclear Physics) | Nonholonomic approach to rotating matter in general relativity | 3 pages, Latex, in: Proc. 8th Marcel Grossmann Meeting | null | null | null | gr-qc | null | Rigidly rotating stationary matter in general relativity has been
investigated by Kramer by the Ernst coordinate method. A weakness of this
approach is that the Ernst potential does not exist for differential rotation.
We now generalize the techniques by the use of a nonholonomic and nonrigid
frame. We apply these te... | [
{
"created": "Thu, 6 Nov 1997 13:29:41 GMT",
"version": "v1"
}
] | 2016-08-15 | [
[
"Marklund",
"Mattias",
"",
"Umeå University"
],
[
"Fodor",
"Gyula",
"",
"KFKI Research Institute for Particle and Nuclear Physics"
],
[
"Perjés",
"Zoltán",
"",
"KFKI Research Institute for Particle and Nuclear Physics"
]
] | Rigidly rotating stationary matter in general relativity has been investigated by Kramer by the Ernst coordinate method. A weakness of this approach is that the Ernst potential does not exist for differential rotation. We now generalize the techniques by the use of a nonholonomic and nonrigid frame. We apply these tech... |
2004.01750 | Foad Parsaei | Foad Parsaei and Nematollah Riazi | Evolving wormhole in the brane-world scenario | 11 pages, 7 figures | Phys. Rev. D 102, 044003 (2020) | 10.1103/PhysRevD.102.044003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, evolving wormholes in the context of brane-world scenario are
investigated. We have studied the possible dynamic solutions with different
forms of Ricci scalar. The possibility of existence of dynamic traversable
wormholes, without resorting to an exotic matter, has been studied. By using
the fact that... | [
{
"created": "Fri, 3 Apr 2020 19:55:32 GMT",
"version": "v1"
}
] | 2020-08-12 | [
[
"Parsaei",
"Foad",
""
],
[
"Riazi",
"Nematollah",
""
]
] | In this paper, evolving wormholes in the context of brane-world scenario are investigated. We have studied the possible dynamic solutions with different forms of Ricci scalar. The possibility of existence of dynamic traversable wormholes, without resorting to an exotic matter, has been studied. By using the fact that t... |
1403.7515 | Giorgio Papini | Giorgio Papini | Covariance and gauge invariance in relativistic theories of gravity | 8 pages, to appear in Modern Physics Letters A | Modern Physics Letters A Vol. 29, No. 14 (2014) 1450075 | 10.1142/S0217732314500758 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Any metric theory of gravity whose interaction with quantum particles is
described by a covariant wave equation is equivalent to a vector theory that
satisfies Maxwell-type equations identically. This result does not depend on
any particular set of field equations for the metric tensor, but only on
covariance. It is ... | [
{
"created": "Fri, 28 Mar 2014 19:48:52 GMT",
"version": "v1"
}
] | 2014-04-30 | [
[
"Papini",
"Giorgio",
""
]
] | Any metric theory of gravity whose interaction with quantum particles is described by a covariant wave equation is equivalent to a vector theory that satisfies Maxwell-type equations identically. This result does not depend on any particular set of field equations for the metric tensor, but only on covariance. It is de... |
2404.11395 | Cooper Watson | Cooper Watson, William Julius, Patrick Brown, Donald Salisbury, Gerald
Cleaver | An Intrinsic Coordinate Reference Frame Procedure I: Tensorial Canonical
Weyl Scalars | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Canonical quantization of gravity in general relativity is greatly simplified
by the artificial decomposition of space and time into a 3+1 formalism. Such a
simplification may appear to come at the cost of general covariance. This
requires tangential and perpendicular infinitesimal diffeomorphisms generated
by the sy... | [
{
"created": "Wed, 17 Apr 2024 13:58:44 GMT",
"version": "v1"
}
] | 2024-04-18 | [
[
"Watson",
"Cooper",
""
],
[
"Julius",
"William",
""
],
[
"Brown",
"Patrick",
""
],
[
"Salisbury",
"Donald",
""
],
[
"Cleaver",
"Gerald",
""
]
] | Canonical quantization of gravity in general relativity is greatly simplified by the artificial decomposition of space and time into a 3+1 formalism. Such a simplification may appear to come at the cost of general covariance. This requires tangential and perpendicular infinitesimal diffeomorphisms generated by the symm... |
gr-qc/0303003 | Sigbjorn Hervik | Alan A. Coley and Sigbjorn Hervik | Brane-world Singularities | 12 pages | Class.Quant.Grav. 20 (2003) 3061-3070 | 10.1088/0264-9381/20/14/308 | null | gr-qc astro-ph | null | We study the behavior of spatially homogeneous brane-worlds close to the
initial singularity in the presence of both local and nonlocal stresses. It is
found that the singularity in these brane-worlds can be locally either
isotropic or anisotropic. We then investigate the Weyl curvature conjecture,
according to which... | [
{
"created": "Sat, 1 Mar 2003 11:09:08 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Coley",
"Alan A.",
""
],
[
"Hervik",
"Sigbjorn",
""
]
] | We study the behavior of spatially homogeneous brane-worlds close to the initial singularity in the presence of both local and nonlocal stresses. It is found that the singularity in these brane-worlds can be locally either isotropic or anisotropic. We then investigate the Weyl curvature conjecture, according to which s... |
gr-qc/0204089 | Dr. Bikash Chandra Paul | B. C. Paul (North Bengal University) | Inflation in Bianchi models and the cosmic no hair theorem in brane
world | 12 pages, no figures, submitted to Phys. Rev. D | Phys.Rev. D66 (2002) 124019 | 10.1103/PhysRevD.66.124019 | null | gr-qc | null | In this paper, the cosmic no hair theorem for anisotropic Bianchi models
which admit inflation with a scalar field is studied in the framework of Brane
world. It is found that all Bianchi models except Bianchi type IX, transit to
an inflationary regime with vanishing anisotropy. In the Brane world,
anisotropic univer... | [
{
"created": "Tue, 30 Apr 2002 08:26:22 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Paul",
"B. C.",
"",
"North Bengal University"
]
] | In this paper, the cosmic no hair theorem for anisotropic Bianchi models which admit inflation with a scalar field is studied in the framework of Brane world. It is found that all Bianchi models except Bianchi type IX, transit to an inflationary regime with vanishing anisotropy. In the Brane world, anisotropic universe... |
2112.14781 | Francesca Vidotto | Pietropaolo Frisoni, Francesco Gozzini, Francesca Vidotto | Numerical analysis of the self-energy in covariant Loop Quantum Gravity | 16 pages, 13 figures | Phys. Rev. D 105 (2022), 106018 | 10.1103/PhysRevD.105.106018 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We study numerically the first order radiative corrections to the
self-energy, in covariant loop quantum gravity. We employ the recently
developed 'sl2cfoam-next' spinfoam amplitudes library, and some original
numerical methods. We analyze the scaling of the divergence with the infrared
cutoff, for which previous ana... | [
{
"created": "Wed, 29 Dec 2021 19:00:01 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Jul 2022 17:54:45 GMT",
"version": "v2"
}
] | 2022-09-29 | [
[
"Frisoni",
"Pietropaolo",
""
],
[
"Gozzini",
"Francesco",
""
],
[
"Vidotto",
"Francesca",
""
]
] | We study numerically the first order radiative corrections to the self-energy, in covariant loop quantum gravity. We employ the recently developed 'sl2cfoam-next' spinfoam amplitudes library, and some original numerical methods. We analyze the scaling of the divergence with the infrared cutoff, for which previous analy... |
2312.02938 | Dirk Puetzfeld | Peter A. Hogan, Dirk Puetzfeld | Gravitational Radiation from an Accelerating Massive Particle in General
Relativity | 9 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A comprehensive description is given of a space--time model of an
accelerating massive particle. The particle radiates gravitational waves with
optical shear. The wave fronts are smoothly deformed spheres and the particle
experiences radiation reaction, similar to an accelerating charged particle,
and a loss of mass ... | [
{
"created": "Tue, 5 Dec 2023 18:09:06 GMT",
"version": "v1"
}
] | 2023-12-06 | [
[
"Hogan",
"Peter A.",
""
],
[
"Puetzfeld",
"Dirk",
""
]
] | A comprehensive description is given of a space--time model of an accelerating massive particle. The particle radiates gravitational waves with optical shear. The wave fronts are smoothly deformed spheres and the particle experiences radiation reaction, similar to an accelerating charged particle, and a loss of mass de... |
1811.06870 | Ali \"Ovg\"un Assist. Prof. | Ali \"Ovg\"un | Reply to "Comment on Light deflection by Damour-Solodukhin wormholes and
Gauss-Bonnet theorem" by Amrita Bhattacharya and Kh. Karimov Ramis | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reply to the Comment of Bhattacharya and Karimov on our paper Light
deflection by Damour-Solodukhin wormholes and Gauss-Bonnet theorem
[arXiv:1811.00768 [gr-qc]]. We address a number of incorrect claims made about
our calculations and methodology. We show below that the claims of BK are
incorrect, and that there a... | [
{
"created": "Thu, 8 Nov 2018 20:31:03 GMT",
"version": "v1"
}
] | 2018-11-19 | [
[
"Övgün",
"Ali",
""
]
] | We reply to the Comment of Bhattacharya and Karimov on our paper Light deflection by Damour-Solodukhin wormholes and Gauss-Bonnet theorem [arXiv:1811.00768 [gr-qc]]. We address a number of incorrect claims made about our calculations and methodology. We show below that the claims of BK are incorrect, and that there are... |
gr-qc/0006035 | Hans Ringstrom | Hans Ringstrom | The Bianchi IX attractor | 82 pages and 8 figures | Annales Henri Poincare 2 (2001) 405-500 | 10.1007/PL00001041 | null | gr-qc | null | We consider the asymptotic behaviour of spatially homogeneous spacetimes of
Bianchi type IX close to the singularity (we also consider some of the other
Bianchi types, e. g. Bianchi VIII in the stiff fluid case). The matter content
is assumed to be an orthogonal perfect fluid with linear equation of state and
zero co... | [
{
"created": "Sat, 10 Jun 2000 08:35:37 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Ringstrom",
"Hans",
""
]
] | We consider the asymptotic behaviour of spatially homogeneous spacetimes of Bianchi type IX close to the singularity (we also consider some of the other Bianchi types, e. g. Bianchi VIII in the stiff fluid case). The matter content is assumed to be an orthogonal perfect fluid with linear equation of state and zero cosm... |
1305.0310 | Henrique de Andrade Gomes | Henrique Gomes | A Birkhoff theorem for Shape Dynamics | 10 pages, matches published version | Class. Quantum Grav. 31 (2014) 085008 | 10.1088/0264-9381/31/8/085008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Shape Dynamics is a theory of gravity that replaces refoliation invariance
for spatial Weyl invariance. Those solutions of the Einstein equations that
have global, constant mean curvature slicings, are mirrored by solutions in
Shape Dynamics. However, there are solutions of Shape Dynamics that have no
counterpart in ... | [
{
"created": "Wed, 1 May 2013 23:03:40 GMT",
"version": "v1"
},
{
"created": "Mon, 27 May 2013 00:01:33 GMT",
"version": "v2"
},
{
"created": "Wed, 31 Jul 2013 18:40:49 GMT",
"version": "v3"
},
{
"created": "Mon, 7 Oct 2013 08:24:32 GMT",
"version": "v4"
},
{
"cre... | 2015-06-15 | [
[
"Gomes",
"Henrique",
""
]
] | Shape Dynamics is a theory of gravity that replaces refoliation invariance for spatial Weyl invariance. Those solutions of the Einstein equations that have global, constant mean curvature slicings, are mirrored by solutions in Shape Dynamics. However, there are solutions of Shape Dynamics that have no counterpart in Ge... |
1009.5651 | Alberto Lobo | Priscilla Canizares, Aleix Conchillo, Marc Diaz--Aguilo, Enrique
Garcia-Berro, Lluis Gesa, Ferran Gibert, Catia Grimani, Ivan Lloro, Alberto
Lobo, Ignacio Mateos, Miquel Nofrarias, Juan Ramos-Castro, Josep Sanjuan and
Carlos F Sopuerta | The LISA PathFinder DMU and Radiation Monitor | 11 pages, 7 figures, prepared for the Proceedings of the 8th
International LISA Symposium, Classical and Quantum Gravity | Class.Quant.Grav.28:094004,2011 | 10.1088/0264-9381/28/9/094004 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The LISA PathFinder DMU (Data Management Unit) flight model was formally
accepted by ESA and ASD on 11 February 2010, after all hardware and software
tests had been successfully completed. The diagnostics items are scheduled to
be delivered by the end of 2010. In this paper we review the requirements and
performance ... | [
{
"created": "Tue, 28 Sep 2010 18:38:34 GMT",
"version": "v1"
}
] | 2011-04-22 | [
[
"Canizares",
"Priscilla",
""
],
[
"Conchillo",
"Aleix",
""
],
[
"Diaz--Aguilo",
"Marc",
""
],
[
"Garcia-Berro",
"Enrique",
""
],
[
"Gesa",
"Lluis",
""
],
[
"Gibert",
"Ferran",
""
],
[
"Grimani",
"Catia",
""... | The LISA PathFinder DMU (Data Management Unit) flight model was formally accepted by ESA and ASD on 11 February 2010, after all hardware and software tests had been successfully completed. The diagnostics items are scheduled to be delivered by the end of 2010. In this paper we review the requirements and performance of... |
1504.06548 | Valentin Rudenko | N. I. Kolosnitsyn and V. N. Rudenko | Gravitational Hertz experiment with electromagnetic radiation in a
strong magnetic field | 10 pages , to be published in Physica Scripta | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Brief review of principal ideas in respect of the high frequency
gravitational radiation generated and detected in the laboratory condition is
presented. Interaction of electro-magnetic and gravitational waves into a
strong magnetic field is considered as a more promising variant of the
laboratory GW-Hertz experiment... | [
{
"created": "Fri, 24 Apr 2015 16:01:34 GMT",
"version": "v1"
}
] | 2015-04-27 | [
[
"Kolosnitsyn",
"N. I.",
""
],
[
"Rudenko",
"V. N.",
""
]
] | Brief review of principal ideas in respect of the high frequency gravitational radiation generated and detected in the laboratory condition is presented. Interaction of electro-magnetic and gravitational waves into a strong magnetic field is considered as a more promising variant of the laboratory GW-Hertz experiment. ... |
2210.04173 | Mohaddese Heydari-Fard | Malihe Heydari-Fard, Sara Ghassemi Honarvar, Mohaddese Heydari-Fard | Thin accretion disk luminosity and its image around rotating black holes
in perfect fluid dark matter | 9 pages(two columns), 9 figures | Monthly Notices of the Royal Astronomical Society, 521 (2023)
708-716 | 10.1093/mnras/stad558 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | Motivated by the fact that the universe is dominated by dark matter and dark
energy, we consider rotating black holes surrounded by perfect fluid dark
matter and study the accretion process in thin disk around such black holes.
Here, we are interested in how the presence of dark matter affects the
properties of the e... | [
{
"created": "Sun, 9 Oct 2022 05:46:41 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Mar 2023 07:59:52 GMT",
"version": "v2"
}
] | 2023-03-09 | [
[
"Heydari-Fard",
"Malihe",
""
],
[
"Honarvar",
"Sara Ghassemi",
""
],
[
"Heydari-Fard",
"Mohaddese",
""
]
] | Motivated by the fact that the universe is dominated by dark matter and dark energy, we consider rotating black holes surrounded by perfect fluid dark matter and study the accretion process in thin disk around such black holes. Here, we are interested in how the presence of dark matter affects the properties of the ele... |
gr-qc/0304050 | Sigbjorn Hervik | John D. Barrow and Sigbjorn Hervik | The Future of Tilted Bianchi Universes | 17 pages; 2 figures; v2:paragraph added | Class.Quant.Grav. 20 (2003) 2841-2854 | 10.1088/0264-9381/20/13/329 | null | gr-qc astro-ph | null | An asymptotic stability analysis of spatially homogeneous models of Bianchi
type containing tilted perfect fluids is performed. Using the known attractors
for the non-tilted Bianchi type universes, we check whether they are stable
against perturbations with respect to tilted perfect fluids. We perform the
analysis fo... | [
{
"created": "Mon, 14 Apr 2003 08:35:58 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Apr 2003 15:09:52 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Barrow",
"John D.",
""
],
[
"Hervik",
"Sigbjorn",
""
]
] | An asymptotic stability analysis of spatially homogeneous models of Bianchi type containing tilted perfect fluids is performed. Using the known attractors for the non-tilted Bianchi type universes, we check whether they are stable against perturbations with respect to tilted perfect fluids. We perform the analysis for ... |
gr-qc/0306028 | Charles R. Evans | Mark D. Hannam, Charles R. Evans, Gregory B. Cook, Thomas W. Baumgarte | Can a combination of the conformal thin-sandwich and puncture methods
yield binary black hole solutions in quasi-equilibrium? | 8 pages, LaTeX2e, 2 postscript figures | Phys.Rev. D68 (2003) 064003 | 10.1103/PhysRevD.68.064003 | NSF-KITP-03-42, TAR-076-UNC | gr-qc | null | We consider combining two important methods for constructing
quasi-equilibrium initial data for binary black holes: the conformal
thin-sandwich formalism and the puncture method. The former seeks to enforce
stationarity in the conformal three-metric and the latter attempts to avoid
internal boundaries, like minimal s... | [
{
"created": "Fri, 6 Jun 2003 20:44:48 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Hannam",
"Mark D.",
""
],
[
"Evans",
"Charles R.",
""
],
[
"Cook",
"Gregory B.",
""
],
[
"Baumgarte",
"Thomas W.",
""
]
] | We consider combining two important methods for constructing quasi-equilibrium initial data for binary black holes: the conformal thin-sandwich formalism and the puncture method. The former seeks to enforce stationarity in the conformal three-metric and the latter attempts to avoid internal boundaries, like minimal sur... |
1709.07760 | Satyanad Kichenassamy | Satyanad Kichenassamy | Soliton stars in the breather limit | null | Classical and Quantum Gravity, 25 (2008) 245004 | 10.1088/0264-9381/25/24/245004 | null | gr-qc math.AP nlin.PS | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper presents an asymptotic reduction of the Einstein-Klein-Gordon
system with real scalar field ("soliton star problem"). A periodic solution of
the reduced system, similar to the sine-Gordon breather, is obtained by a
variational method. This tallies with numerical computations. As a consequence,
a time-perio... | [
{
"created": "Fri, 22 Sep 2017 14:04:33 GMT",
"version": "v1"
}
] | 2017-09-25 | [
[
"Kichenassamy",
"Satyanad",
""
]
] | This paper presents an asymptotic reduction of the Einstein-Klein-Gordon system with real scalar field ("soliton star problem"). A periodic solution of the reduced system, similar to the sine-Gordon breather, is obtained by a variational method. This tallies with numerical computations. As a consequence, a time-periodi... |
2404.17616 | Sanasam Surendra Singh | Amit Samaddar, S. Surendra Singh, Shah Muhammad, Euaggelos E. Zotos | Behaviours of rip cosmological models in $f(Q,C)$ gravity | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, the Universe's rip cosmology theories have been provided for
the $f(Q,C)$ gravity theory, where $Q$ and $C$ stand for the non-metricity
scalar and boundary term. We assumed $f(Q,C)=\alpha Q^{n}+\beta C$ and analyzed
the nature of the physical parameters for the Little Rip, Big Rip and Pseudo
Rip models... | [
{
"created": "Fri, 26 Apr 2024 10:06:56 GMT",
"version": "v1"
}
] | 2024-04-30 | [
[
"Samaddar",
"Amit",
""
],
[
"Singh",
"S. Surendra",
""
],
[
"Muhammad",
"Shah",
""
],
[
"Zotos",
"Euaggelos E.",
""
]
] | In this study, the Universe's rip cosmology theories have been provided for the $f(Q,C)$ gravity theory, where $Q$ and $C$ stand for the non-metricity scalar and boundary term. We assumed $f(Q,C)=\alpha Q^{n}+\beta C$ and analyzed the nature of the physical parameters for the Little Rip, Big Rip and Pseudo Rip models. ... |
gr-qc/9605007 | Miquel Dorca. Fisica Teorica Uab. Telf: | M. Dorca and E. Verdaguer | Quantum fields interacting with colliding plane waves: the stress-energy
tensor and backreaction | 37 pages, LaTeX, 1 figure as a separate postscript file using
uufiles. Full postscript version soon available at
ftp://ftp.ifae.es/preprint/ft/uabft390.ps. A change in voffset latex command
has been performed | Nucl.Phys. B484 (1997) 435-475 | 10.1016/S0550-3213(96)00575-5 | UAB-FT-390 | gr-qc | null | Following a previous work on the quantization of a massless scalar field in a
spacetime representing the head on collision of two plane waves which fucus
into a Killing-Cauchy horizon, we compute the renormalized expectation value of
the stress-energy tensor of the quantum field near that horizon in the physical
stat... | [
{
"created": "Thu, 2 May 1996 21:03:48 GMT",
"version": "v1"
},
{
"created": "Fri, 3 May 1996 11:56:49 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Dorca",
"M.",
""
],
[
"Verdaguer",
"E.",
""
]
] | Following a previous work on the quantization of a massless scalar field in a spacetime representing the head on collision of two plane waves which fucus into a Killing-Cauchy horizon, we compute the renormalized expectation value of the stress-energy tensor of the quantum field near that horizon in the physical state ... |
1212.1253 | Wei-Tou Ni | An-Ming Wu and Wei-Tou Ni | Deployment and simulation of the ASTROD-GW formation | 15 pages, 5 figures, 3 tables, to be published in IJMPD vol.
22,1341005 (2013); this version to match the printed version | International Journal of Modern Physics D Vol. 22, No. 1 (2013)
1341005 (16 pages) | 10.1142/S0218271813410058 | null | gr-qc astro-ph.CO astro-ph.IM physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Constellation or formation flying is a common concept in space Gravitational
Wave (GW) mission proposals for the required interferometry implementation. The
spacecraft of most of these mission proposals go to deep space and many have
Earthlike orbits around the Sun. ASTROD-GW, Big Bang Observer and DECIGO have
spacec... | [
{
"created": "Thu, 6 Dec 2012 07:53:07 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Dec 2012 12:14:24 GMT",
"version": "v2"
},
{
"created": "Fri, 18 Jan 2013 07:02:30 GMT",
"version": "v3"
}
] | 2013-02-01 | [
[
"Wu",
"An-Ming",
""
],
[
"Ni",
"Wei-Tou",
""
]
] | Constellation or formation flying is a common concept in space Gravitational Wave (GW) mission proposals for the required interferometry implementation. The spacecraft of most of these mission proposals go to deep space and many have Earthlike orbits around the Sun. ASTROD-GW, Big Bang Observer and DECIGO have spacecra... |
2304.14174 | Bijan Bagchi | Bijan Bagchi, Rahul Ghosh, Sauvik Sen | Analogue Hawking radiation as a tunneling in a two-level
$\mathcal{PT}$-symmetric system | Entropy 2023, 25, 1202 | null | 10.3390/e25081202 | null | gr-qc cond-mat.other hep-th quant-ph | http://creativecommons.org/publicdomain/zero/1.0/ | In the light of a general scenario of a two-level non-Hermitian
$\mathcal{PT}$-symmetric Hamiltonian we apply the tetrad-based method to
analyze the possibility of analogue Hawking radiation. It is done by making use
of the conventional null-geodesic approach wherein the associated Hawking
radiation is described as a... | [
{
"created": "Thu, 27 Apr 2023 13:23:32 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Aug 2023 03:05:27 GMT",
"version": "v2"
}
] | 2023-08-16 | [
[
"Bagchi",
"Bijan",
""
],
[
"Ghosh",
"Rahul",
""
],
[
"Sen",
"Sauvik",
""
]
] | In the light of a general scenario of a two-level non-Hermitian $\mathcal{PT}$-symmetric Hamiltonian we apply the tetrad-based method to analyze the possibility of analogue Hawking radiation. It is done by making use of the conventional null-geodesic approach wherein the associated Hawking radiation is described as a q... |
1704.04020 | Guillem Dom\`enech | Pisin Chen, Guillem Dom\`enech, Misao Sasaki and Dong-han Yeom | Thermal activation of thin-shells in anti-de Sitter black hole spacetime | published version | null | 10.1007/JHEP07(2017)134 | YITP-17-39 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate thermal activation of thin-shells around anti-de Sitter black
holes. Under the thin-shell approximation, we extensively study the parameter
region that allows a bubble nucleation bounded by a thin-shell out of a thermal
bath. We show that in general if one fixes the temperature outside the shell,
one n... | [
{
"created": "Thu, 13 Apr 2017 07:34:33 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Sep 2017 05:30:02 GMT",
"version": "v2"
}
] | 2017-09-29 | [
[
"Chen",
"Pisin",
""
],
[
"Domènech",
"Guillem",
""
],
[
"Sasaki",
"Misao",
""
],
[
"Yeom",
"Dong-han",
""
]
] | We investigate thermal activation of thin-shells around anti-de Sitter black holes. Under the thin-shell approximation, we extensively study the parameter region that allows a bubble nucleation bounded by a thin-shell out of a thermal bath. We show that in general if one fixes the temperature outside the shell, one nee... |
2007.11562 | Keefe Mitman | Keefe Mitman, Jordan Moxon, Mark A. Scheel, Saul A. Teukolsky, Michael
Boyle, Nils Deppe, Lawrence E. Kidder, William Throwe | Computation of Displacement and Spin Gravitational Memory in Numerical
Relativity | 20 pages, 11 figures; 10.1103/PhysRevD.102.104007. Corrected a minor
sign error in Eqs. 27, 40, 42, 43, and 51 | Phys. Rev. D 102, 104007 (2020) | 10.1103/PhysRevD.102.104007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the first numerical relativity waveforms for binary black hole
mergers produced using spectral methods that show both the displacement and the
spin memory effects. Explicitly, we use the SXS Collaboration's $\texttt{SpEC}$
code to run a Cauchy evolution of a binary black hole merger and then extract
the gr... | [
{
"created": "Wed, 22 Jul 2020 17:40:05 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Aug 2020 20:04:11 GMT",
"version": "v2"
},
{
"created": "Wed, 4 Nov 2020 00:58:10 GMT",
"version": "v3"
},
{
"created": "Tue, 26 Jan 2021 16:34:48 GMT",
"version": "v4"
}
] | 2021-01-27 | [
[
"Mitman",
"Keefe",
""
],
[
"Moxon",
"Jordan",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Teukolsky",
"Saul A.",
""
],
[
"Boyle",
"Michael",
""
],
[
"Deppe",
"Nils",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
... | We present the first numerical relativity waveforms for binary black hole mergers produced using spectral methods that show both the displacement and the spin memory effects. Explicitly, we use the SXS Collaboration's $\texttt{SpEC}$ code to run a Cauchy evolution of a binary black hole merger and then extract the grav... |
gr-qc/9412067 | Adrian Kent | Fay Dowker, Adrian Kent | On the Consistent Histories Approach to Quantum Mechanics | Published version, to appear in J. Stat. Phys. in early 1996. The
main arguments and conclusions remain unaltered, but there are significant
revisions from the earlier archive version. These include a new subsection on
interpretations of the formalism, other additions clarifying various
arguments in response to... | J.Statist.Phys. 82 (1996) 1575-1646 | 10.1007/BF02183396 | DAMTP/94-48, NI 94006 | gr-qc hep-th quant-ph | null | We review the consistent histories formulations of quantum mechanics
developed by Griffiths, Omn\`es and Gell-Mann and Hartle, and describe the
classification of consistent sets. We illustrate some general features of
consistent sets by a few simple lemmas and examples. We consider various
interpretations of the form... | [
{
"created": "Thu, 22 Dec 1994 15:22:13 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jan 1996 19:35:25 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Dowker",
"Fay",
""
],
[
"Kent",
"Adrian",
""
]
] | We review the consistent histories formulations of quantum mechanics developed by Griffiths, Omn\`es and Gell-Mann and Hartle, and describe the classification of consistent sets. We illustrate some general features of consistent sets by a few simple lemmas and examples. We consider various interpretations of the formal... |
gr-qc/0209107 | Lior M. Burko | Lior M.Burko and Gaurav Khanna | Radiative falloff in the background of rotating black hole | 5 pages, 4 Encapsulated PostScript figures; Accepted to Phys. Rev. D
(Rapid Communication) | Phys.Rev. D67 (2003) 081502 | 10.1103/PhysRevD.67.081502 | null | gr-qc | null | We study numerically the late-time tails of linearized fields with any spin
$s$ in the background of a spinning black hole. Our code is based on the
ingoing Kerr coordinates, which allow us to penetrate through the event
horizon. The late time tails are dominated by the mode with the least multipole
moment $\ell$ whi... | [
{
"created": "Fri, 27 Sep 2002 17:44:58 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Mar 2003 20:05:36 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Burko",
"Lior M.",
""
],
[
"Khanna",
"Gaurav",
""
]
] | We study numerically the late-time tails of linearized fields with any spin $s$ in the background of a spinning black hole. Our code is based on the ingoing Kerr coordinates, which allow us to penetrate through the event horizon. The late time tails are dominated by the mode with the least multipole moment $\ell$ which... |
2201.08287 | Dimitris Moustos | Dimitris Moustos | Uniformly accelerated Brownian oscillator in (2+1)D:
temperature-dependent dissipation and frequency shift | 8 pages, 1 figure, Appendix A was added, Updated to match the
published version | Phys. Lett. B 829, 137115 (2022) | 10.1016/j.physletb.2022.137115 | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | We consider an Unruh-DeWitt detector modeled as a harmonic oscillator that is
coupled to a massless quantum scalar field in the (2+1)-dimensional Minkowski
spacetime. We treat the detector as an open quantum system and employ a quantum
Langevin equation to describe its time evolution, with the field, which is
charact... | [
{
"created": "Thu, 20 Jan 2022 16:45:38 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Apr 2022 09:09:22 GMT",
"version": "v2"
}
] | 2022-04-28 | [
[
"Moustos",
"Dimitris",
""
]
] | We consider an Unruh-DeWitt detector modeled as a harmonic oscillator that is coupled to a massless quantum scalar field in the (2+1)-dimensional Minkowski spacetime. We treat the detector as an open quantum system and employ a quantum Langevin equation to describe its time evolution, with the field, which is character... |
2304.12553 | Zhen Li | Zhen Li, Faqiang Yuan | Energy extraction via Comisso-Asenjo mechanism from rotating hairy black
hole | 8 pages, 8 figures. arXiv admin note: text overlap with
arXiv:2304.08831 | null | 10.1103/PhysRevD.108.024039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was demonstrated by Comisso and Asenjo that the magnetic reconnection in
the ergosphere is a promising mechanism to extract energy from the rotating
Kerr black hole. In this work, we investigate the role of Comisso-Asenjo
mechanism in energy extraction from the newly suggested rotating hairy black
holes which have... | [
{
"created": "Tue, 25 Apr 2023 03:41:41 GMT",
"version": "v1"
},
{
"created": "Thu, 4 May 2023 08:34:17 GMT",
"version": "v2"
}
] | 2023-08-02 | [
[
"Li",
"Zhen",
""
],
[
"Yuan",
"Faqiang",
""
]
] | It was demonstrated by Comisso and Asenjo that the magnetic reconnection in the ergosphere is a promising mechanism to extract energy from the rotating Kerr black hole. In this work, we investigate the role of Comisso-Asenjo mechanism in energy extraction from the newly suggested rotating hairy black holes which have a... |
1205.4417 | Domingo Louis-Martinez | Domingo J. Louis-Martinez | A relativistic action-at-a-distance description of gravitational
interactions? | null | null | 10.1103/PhysRevD.86.045009 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that certain aspects of gravitation may be described using a
relativistic action-at-a-distance formulation. The equations of motion of the
model presented are invariant under Lorentz transformations and agree with the
equations of Einstein's theory of General Relativity, at the first
Post-Newtonian approx... | [
{
"created": "Sun, 20 May 2012 13:25:33 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Louis-Martinez",
"Domingo J.",
""
]
] | It is shown that certain aspects of gravitation may be described using a relativistic action-at-a-distance formulation. The equations of motion of the model presented are invariant under Lorentz transformations and agree with the equations of Einstein's theory of General Relativity, at the first Post-Newtonian approxim... |
1306.5634 | Iver Brevik | Iver Brevik and {\O}yvind Gr{\o}n | Universe Models with Negative Bulk Viscosity | 7 pages latex, no figures, published electronically in Astrophys.
Space Sci | Astrophys. Space Sci. (2013) 347, 399 | 10.1007/s10509-013-1525-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The concept of negative temperatures has occasionally been used in connection
with quantum systems. A recent example of this sort is reported in the paper of
S. Braun et al. [Science 339,52 (2013)], where an attractively interacting
ensemble of ultracold atoms is investigated experimentally and found to
correspond to... | [
{
"created": "Mon, 24 Jun 2013 14:03:09 GMT",
"version": "v1"
}
] | 2013-10-01 | [
[
"Brevik",
"Iver",
""
],
[
"Grøn",
"Øyvind",
""
]
] | The concept of negative temperatures has occasionally been used in connection with quantum systems. A recent example of this sort is reported in the paper of S. Braun et al. [Science 339,52 (2013)], where an attractively interacting ensemble of ultracold atoms is investigated experimentally and found to correspond to a... |
1901.04498 | William East | William E. East | Cosmic Censorship Upheld in Spheroidal Collapse of Collisionless Matter | 6 pages, 6 figures; revised to match PRL version, including expanded
results | Phys. Rev. Lett. 122, 231103 (2019) | 10.1103/PhysRevLett.122.231103 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the collapse of spheroidal configurations of collisionless particles
in full general relativity. This setup was originally considered by Shapiro and
Teukolsky (1991), where it was found that prolate configurations with a
sufficiently large semimajor axis gave rise to diverging curvature, but no
apparent hori... | [
{
"created": "Mon, 14 Jan 2019 19:00:02 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jun 2019 18:08:56 GMT",
"version": "v2"
}
] | 2019-06-18 | [
[
"East",
"William E.",
""
]
] | We study the collapse of spheroidal configurations of collisionless particles in full general relativity. This setup was originally considered by Shapiro and Teukolsky (1991), where it was found that prolate configurations with a sufficiently large semimajor axis gave rise to diverging curvature, but no apparent horizo... |
2310.18686 | Gungwon Kang | Yeong-Bok Bae, Young-Hwan Hyun and Gungwon Kang | Ringdown gravitational waves from close scattering of two black holes | 6 pages,4 figures | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have numerically investigated close scattering processes of two black
holes (BHs). Our careful analysis shows for the first time a non-merging
ringdown gravitational wave coming from dynamical tidal deformations of
individual BHs during their close encounter. The ringdown wave frequencies turn
out to agree well wi... | [
{
"created": "Sat, 28 Oct 2023 12:01:08 GMT",
"version": "v1"
}
] | 2023-10-31 | [
[
"Bae",
"Yeong-Bok",
""
],
[
"Hyun",
"Young-Hwan",
""
],
[
"Kang",
"Gungwon",
""
]
] | We have numerically investigated close scattering processes of two black holes (BHs). Our careful analysis shows for the first time a non-merging ringdown gravitational wave coming from dynamical tidal deformations of individual BHs during their close encounter. The ringdown wave frequencies turn out to agree well with... |
gr-qc/0608113 | Luca Baiotti | Luca Baiotti, Luciano Rezzolla | Challenging the paradigm of singularity excision in gravitational
collapse | 4 pages, 4 figures, accepted for publication on Phys. Rev. Lett | Phys.Rev.Lett. 97 (2006) 141101 | 10.1103/PhysRevLett.97.141101 | null | gr-qc astro-ph | null | A paradigm deeply rooted in modern numerical relativity calculations
prescribes the removal of those regions of the computational domain where a
physical singularity may develop. We here challenge this paradigm by performing
three-dimensional simulations of the collapse of uniformly rotating stars to
black holes with... | [
{
"created": "Sat, 26 Aug 2006 11:40:59 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Oct 2006 17:23:27 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Baiotti",
"Luca",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | A paradigm deeply rooted in modern numerical relativity calculations prescribes the removal of those regions of the computational domain where a physical singularity may develop. We here challenge this paradigm by performing three-dimensional simulations of the collapse of uniformly rotating stars to black holes withou... |
gr-qc/0102013 | Sean A. Hayward | Sean A. Hayward | Gravitational-wave dynamics and black-hole dynamics: second
quasi-spherical approximation | 16 revtex pages | Class.Quant.Grav. 18 (2001) 5561-5582 | 10.1088/0264-9381/18/24/316 | null | gr-qc | null | Gravitational radiation with roughly spherical wavefronts, produced by
roughly spherical black holes or other astrophysical objects, is described by
an approximation scheme. The first quasi-spherical approximation, describing
radiation propagation on a background, is generalized to include additional
non-linear effec... | [
{
"created": "Mon, 5 Feb 2001 07:20:47 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Hayward",
"Sean A.",
""
]
] | Gravitational radiation with roughly spherical wavefronts, produced by roughly spherical black holes or other astrophysical objects, is described by an approximation scheme. The first quasi-spherical approximation, describing radiation propagation on a background, is generalized to include additional non-linear effects... |
2405.08335 | Amee Bhatt | Amee Bhatt | A Comparative Study of Shadows of Magnetized and Non-Magnetized
Singularities | 6 pages, & figues | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by-nc-sa/4.0/ | The recent observations of the galactic center of the M87 galaxy have made
the field of observing black holes and calculating its shadow much more
intriguing. Approaching the question of calculating shadows, many
approximations are made in order to simplify the equations which makes the
considered case less realistic... | [
{
"created": "Tue, 14 May 2024 06:13:22 GMT",
"version": "v1"
}
] | 2024-05-15 | [
[
"Bhatt",
"Amee",
""
]
] | The recent observations of the galactic center of the M87 galaxy have made the field of observing black holes and calculating its shadow much more intriguing. Approaching the question of calculating shadows, many approximations are made in order to simplify the equations which makes the considered case less realistic. ... |
gr-qc/0110104 | Allemandi Gianluca | G. Allemandi, M. Francaviglia, M. Raiteri | The First Law of Isolated Horizons via Noether Theorem | 29 pages | null | null | null | gr-qc | null | A general recipe proposed elsewhere to define, via Noether theorem, the
variation of energy for a natural field theory is applied to Einstein-Maxwell
theory. The electromagnetic field is analysed in the geometric framework of
natural bundles. Einstein-Maxwell theory turns then out to be natural rather
than gauge-natu... | [
{
"created": "Wed, 24 Oct 2001 08:11:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Allemandi",
"G.",
""
],
[
"Francaviglia",
"M.",
""
],
[
"Raiteri",
"M.",
""
]
] | A general recipe proposed elsewhere to define, via Noether theorem, the variation of energy for a natural field theory is applied to Einstein-Maxwell theory. The electromagnetic field is analysed in the geometric framework of natural bundles. Einstein-Maxwell theory turns then out to be natural rather than gauge-natura... |
gr-qc/0206038 | J. Alberto Lobo | Alberto Lobo, Massimo Cerdonio, Alvaro Montero | Fake signals caused by heavy mass motions near a sensitive spherical
gravitational wave antenna | 10 pages, 4 EPS figures, LaTeX2e, IOP style files, submitted to CQG | Class.Quant.Grav. 19 (2002) 4845-4854 | 10.1088/0264-9381/19/19/304 | null | gr-qc | null | This paper analyses in quantitative detail the effect caused by a moving mass
on a spherical gravitational wave detector. This applies to situations where
heavy traffic or similar disturbances happen near the GW antenna. Such
disturbances result in quadrupole tidal stresses in the antenna mass, and they
therefore pre... | [
{
"created": "Thu, 13 Jun 2002 17:22:37 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Lobo",
"Alberto",
""
],
[
"Cerdonio",
"Massimo",
""
],
[
"Montero",
"Alvaro",
""
]
] | This paper analyses in quantitative detail the effect caused by a moving mass on a spherical gravitational wave detector. This applies to situations where heavy traffic or similar disturbances happen near the GW antenna. Such disturbances result in quadrupole tidal stresses in the antenna mass, and they therefore preci... |
gr-qc/0110013 | David Garfinkle | David Garfinkle | Harmonic coordinate method for simulating generic singularities | 5 pages, 4 figures, Revtex, discussion expanded, references added | Phys.Rev.D65:044029,2002 | 10.1103/PhysRevD.65.044029 | null | gr-qc | null | This paper presents both a numerical method for general relativity and an
application of that method. The method involves the use of harmonic coordinates
in a 3+1 code to evolve the Einstein equations with scalar field matter. In
such coordinates, the terms in Einstein's equations with the highest number of
derivativ... | [
{
"created": "Mon, 1 Oct 2001 19:48:44 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Jan 2002 00:38:08 GMT",
"version": "v2"
}
] | 2011-04-21 | [
[
"Garfinkle",
"David",
""
]
] | This paper presents both a numerical method for general relativity and an application of that method. The method involves the use of harmonic coordinates in a 3+1 code to evolve the Einstein equations with scalar field matter. In such coordinates, the terms in Einstein's equations with the highest number of derivatives... |
gr-qc/0203099 | Lorenzo Iorio | Lorenzo Iorio, David M. Lucchesi, I. Ciufolini | The LARES mission revisited: an alternative scenario | Latex2e, 20 pages, 6 figures, 5 tables. To appear on Classical and
Quantum Gravity | Class.Quant.Grav. 19 (2002) 4311-4326 | 10.1088/0264-9381/19/16/307 | null | gr-qc astro-ph physics.geo-ph physics.space-ph | null | A new proposal for the implementation of LARES mission is presented. In
particular, a new observable is proposed and alternative scenarios are
discussed.
| [
{
"created": "Wed, 27 Mar 2002 16:50:30 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Apr 2002 17:10:30 GMT",
"version": "v2"
},
{
"created": "Wed, 8 May 2002 16:44:44 GMT",
"version": "v3"
},
{
"created": "Thu, 11 Jul 2002 13:56:59 GMT",
"version": "v4"
},
{
"cre... | 2007-05-23 | [
[
"Iorio",
"Lorenzo",
""
],
[
"Lucchesi",
"David M.",
""
],
[
"Ciufolini",
"I.",
""
]
] | A new proposal for the implementation of LARES mission is presented. In particular, a new observable is proposed and alternative scenarios are discussed. |
1707.04495 | S. I. Kruglov | S. I. Kruglov | Born--Infeld-type electrodynamics and magnetic black holes | 15 pages, 6 figures, corrected Eq. (26) and Fig. 6 | Annals Phys. 383 (2017) 550-559; Annals Phys. 434 (2021), 168625 | 10.1016/j.aop.2017.06.008 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a Born--Infeld-type model of nonlinear electrodynamics,
possessing three parameters, coupled with general relativity. As a particular
case Born--Infeld electrodynamics is reproduced. There is no singularity of the
electric field at the centre of point-like charged particles and self-energy of
charges i... | [
{
"created": "Wed, 12 Jul 2017 21:44:09 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Sep 2021 15:31:41 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Oct 2021 14:18:44 GMT",
"version": "v3"
}
] | 2021-10-22 | [
[
"Kruglov",
"S. I.",
""
]
] | We investigate a Born--Infeld-type model of nonlinear electrodynamics, possessing three parameters, coupled with general relativity. As a particular case Born--Infeld electrodynamics is reproduced. There is no singularity of the electric field at the centre of point-like charged particles and self-energy of charges is ... |
gr-qc/0312047 | Piotr Chrusciel | Hubert L. Bray, Piotr T. Chrusciel | The Penrose Inequality | 29 pages, latex2e, minor misprints corrected, final version to appear
in "The Einstein Equations and the Large Scale Behavior of Gravitational
Fields (50 years of the Cauchy problem in general relativity)", H. Friedrich
and P.T. Chruściel, Editors, Birkhaeuser, 2004 | null | null | Esi preprint 1390 | gr-qc math.DG | null | In 1973, R. Penrose presented an argument that the total mass of a space-time
which contains black holes with event horizons of total area $A$ should be at
least $\sqrt{A/16\pi}$. An important special case of this physical statement
translates into a very beautiful mathematical inequality in Riemannian geometry
known... | [
{
"created": "Mon, 8 Dec 2003 23:08:19 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Sep 2004 15:38:15 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Bray",
"Hubert L.",
""
],
[
"Chrusciel",
"Piotr T.",
""
]
] | In 1973, R. Penrose presented an argument that the total mass of a space-time which contains black holes with event horizons of total area $A$ should be at least $\sqrt{A/16\pi}$. An important special case of this physical statement translates into a very beautiful mathematical inequality in Riemannian geometry known a... |
2203.00524 | Alex Deich | Alexander Deich, Alejandro C\'ardenas-Avenda\~no, Nicolas Yunes | Chaos in Quadratic Gravity | 12 pages, 11 figures | null | 10.1103/PhysRevD.106.024040 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | While recent gravitational wave observations by LIGO and Virgo allow for
tests of general relativity in the extreme gravity regime, these observations
are still blind to a large swath of phenomena outside these instruments'
sensitivity curves. Future gravitational-wave detectors, such as LISA, will
enable probes of l... | [
{
"created": "Tue, 1 Mar 2022 15:08:25 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2022 19:32:05 GMT",
"version": "v2"
}
] | 2022-08-03 | [
[
"Deich",
"Alexander",
""
],
[
"Cárdenas-Avendaño",
"Alejandro",
""
],
[
"Yunes",
"Nicolas",
""
]
] | While recent gravitational wave observations by LIGO and Virgo allow for tests of general relativity in the extreme gravity regime, these observations are still blind to a large swath of phenomena outside these instruments' sensitivity curves. Future gravitational-wave detectors, such as LISA, will enable probes of lon... |
1007.3857 | Matteo Luca Ruggiero | Matteo Luca Ruggiero | Gravito-electromagnetic Aharonov-Bohm effect: some rotation effects
revised | 19 pages, 2 figures, in in Proceedings of Analysis, Manifolds and
Geometric Structures in Physics, International Conference in Honour of Y.
Choquet-Bruhat, June 2004, Isola d'Elba, Italy | Nuovo Cim. B119:893,2004 | 10.1393/ncb/i2004-10185-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By means of the description of the standard relative dynamics in terms of
gravito-electromagnetic fields, in the context of natural splitting, we
formally introduce the gravito-magnetic Aharonov-Bohm effect. Then, we
interpret the Sagnac effect as a gravito-magnetic Aharonov-Bohm effect and we
exploit this formalism ... | [
{
"created": "Thu, 22 Jul 2010 11:26:46 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Ruggiero",
"Matteo Luca",
""
]
] | By means of the description of the standard relative dynamics in terms of gravito-electromagnetic fields, in the context of natural splitting, we formally introduce the gravito-magnetic Aharonov-Bohm effect. Then, we interpret the Sagnac effect as a gravito-magnetic Aharonov-Bohm effect and we exploit this formalism fo... |
1410.4657 | Taeyoon Moon | Yun Soo Myung and Taeyoon Moon | Cosmological three-coupled scalar theory for the dS/LCFT correspondence | 1+25 pages, 1 figure, version accepted for publication in JCAP | null | 10.1088/1475-7516/2015/01/033 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate cosmological perturbations generated during de Sitter
inflation in the three-coupled scalar theory. This theory is composed of three
coupled scalars ($\phi_p,p=1,2,3$) to give a sixth-order derivative scalar
theory for $\phi_3$, in addition to tensor. Recovering the power spectra
between scalars from t... | [
{
"created": "Fri, 17 Oct 2014 08:27:48 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jan 2015 07:24:28 GMT",
"version": "v2"
}
] | 2015-06-23 | [
[
"Myung",
"Yun Soo",
""
],
[
"Moon",
"Taeyoon",
""
]
] | We investigate cosmological perturbations generated during de Sitter inflation in the three-coupled scalar theory. This theory is composed of three coupled scalars ($\phi_p,p=1,2,3$) to give a sixth-order derivative scalar theory for $\phi_3$, in addition to tensor. Recovering the power spectra between scalars from the... |
1211.3202 | Shahar Hod | Shahar Hod | Stationary Scalar Clouds Around Rotating Black Holes | 5 pages | Physical Review D 86, 104026 (2012) | 10.1103/PhysRevD.86.104026 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by novel results in the theory of wave dynamics in black-hole
spacetimes, we analyze the dynamics of a massive scalar field surrounding a
rapidly rotating Kerr black hole. In particular, we report on the existence of
stationary (infinitely long-lived) regular field configurations in the
background of maxima... | [
{
"created": "Wed, 14 Nov 2012 04:32:07 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Nov 2012 06:23:58 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Hod",
"Shahar",
""
]
] | Motivated by novel results in the theory of wave dynamics in black-hole spacetimes, we analyze the dynamics of a massive scalar field surrounding a rapidly rotating Kerr black hole. In particular, we report on the existence of stationary (infinitely long-lived) regular field configurations in the background of maximall... |
1008.0695 | Muhammad Sharif | M. Sharif and Aisha Siddiqa | Dynamics of Charged Plane Symmetric Gravitational Collapse | 21 pages, accepted for publication Gen. Relativ. Grav | Gen.Rel.Grav.43:73-91,2011 | 10.1007/s10714-010-1071-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study dynamics of the charged plane symmetric gravitational
collapse. For this purpose, we discuss non-adiabatic flow of a viscous fluid
and deduce the results for adiabatic case. The Einstein and Maxwell field
equations are formulated for general plane symmetric spacetime in the interior.
Junction ... | [
{
"created": "Wed, 4 Aug 2010 04:53:31 GMT",
"version": "v1"
}
] | 2011-02-11 | [
[
"Sharif",
"M.",
""
],
[
"Siddiqa",
"Aisha",
""
]
] | In this paper, we study dynamics of the charged plane symmetric gravitational collapse. For this purpose, we discuss non-adiabatic flow of a viscous fluid and deduce the results for adiabatic case. The Einstein and Maxwell field equations are formulated for general plane symmetric spacetime in the interior. Junction co... |
1907.06168 | Miguel Cruz | Gilberto Aguilar-P\'erez, Miguel Cruz, Samuel Lepe and Israel
Moran-Rivera | Hairy black hole stability under odd parity perturbations in the
Einstein-Gauss-Bonnet model | 15 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Supported by the use of a regular scalar field we find a black hole solution
in the Einstein-Gauss-Bonnet model. From the obtained solution we can recover
the Schwarzschild black hole as in other works. Later, by implementing the odd
parity perturbations method we study the stability of the linearized equations
of mo... | [
{
"created": "Sun, 14 Jul 2019 05:09:07 GMT",
"version": "v1"
}
] | 2019-07-16 | [
[
"Aguilar-Pérez",
"Gilberto",
""
],
[
"Cruz",
"Miguel",
""
],
[
"Lepe",
"Samuel",
""
],
[
"Moran-Rivera",
"Israel",
""
]
] | Supported by the use of a regular scalar field we find a black hole solution in the Einstein-Gauss-Bonnet model. From the obtained solution we can recover the Schwarzschild black hole as in other works. Later, by implementing the odd parity perturbations method we study the stability of the linearized equations of moti... |
1702.04293 | Massimo Giovannini | Massimo Giovannini | Hypermagnetic knots and gravitational radiation at intermediate
frequencies | 19 pages, 2 figures; to appear in Classical and Quantum Gravity as a
regular article | Class. Quantum Grav. 34 (2017) 135010 | 10.1088/1361-6382/aa75c5 | CERN-PH-TH-2016-195 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The maximally gyrotropic configurations of the hypermagnetic field at the
electroweak epoch can induce a stochastic background of relic gravitational
waves with comoving frequencies ranging from the $\mu$Hz to the kHz. Using two
complementary approaches we construct a physical template family for the
emission of the ... | [
{
"created": "Tue, 14 Feb 2017 17:07:11 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Jun 2017 15:41:39 GMT",
"version": "v2"
}
] | 2017-06-28 | [
[
"Giovannini",
"Massimo",
""
]
] | The maximally gyrotropic configurations of the hypermagnetic field at the electroweak epoch can induce a stochastic background of relic gravitational waves with comoving frequencies ranging from the $\mu$Hz to the kHz. Using two complementary approaches we construct a physical template family for the emission of the gr... |
1408.3390 | Ernesto F. Eiroa | Ernesto F. Eiroa, Carlos M. Sendra | Strong deflection lensing by charged black holes in scalar-tensor
gravity | 12 pages, 3 figures; v2: improved version, new references added | Eur. Phys. J. C (2014) 74:3171 | 10.1140/epjc/s10052-014-3171-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine a class of charged black holes in scalar-tensor gravity as
gravitational lenses. We find the deflection angle in the strong deflection
limit, from which we obtain the positions and the magnifications of the
relativistic images. We compare our results with those corresponding to the
Reissner-Norstrom spacet... | [
{
"created": "Thu, 14 Aug 2014 19:07:34 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Nov 2014 19:31:43 GMT",
"version": "v2"
}
] | 2014-12-01 | [
[
"Eiroa",
"Ernesto F.",
""
],
[
"Sendra",
"Carlos M.",
""
]
] | We examine a class of charged black holes in scalar-tensor gravity as gravitational lenses. We find the deflection angle in the strong deflection limit, from which we obtain the positions and the magnifications of the relativistic images. We compare our results with those corresponding to the Reissner-Norstrom spacetim... |
1512.02864 | Thomas Adams Dr | T Adams, D. Buskulic, V. Germain, G. M. Guidi, F. Marion, M. Montani,
B. Mours, F. Piergiovanni, G. Wang | Low-latency analysis pipeline for compact binary coalescences in the
advanced gravitational wave detector era | 18 pages, 10 figures | null | 10.1088/0264-9381/33/17/175012 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The multi-band template analysis (MBTA) pipeline is a low-latency coincident
analysis pipeline for the detection of gravitational waves (GWs) from compact
binary coalescences. MBTA runs with a low computational cost, and can identify
candidate GW events online with a sub-minute latency. The low computational
running ... | [
{
"created": "Wed, 9 Dec 2015 14:14:59 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Aug 2016 14:06:54 GMT",
"version": "v2"
}
] | 2016-08-24 | [
[
"Adams",
"T",
""
],
[
"Buskulic",
"D.",
""
],
[
"Germain",
"V.",
""
],
[
"Guidi",
"G. M.",
""
],
[
"Marion",
"F.",
""
],
[
"Montani",
"M.",
""
],
[
"Mours",
"B.",
""
],
[
"Piergiovanni",
"F.",
... | The multi-band template analysis (MBTA) pipeline is a low-latency coincident analysis pipeline for the detection of gravitational waves (GWs) from compact binary coalescences. MBTA runs with a low computational cost, and can identify candidate GW events online with a sub-minute latency. The low computational running co... |
2001.03290 | Hideki Asada | Keita Takizawa, Toshiaki Ono, Hideki Asada | Gravitational deflection angle of light: Definition by an observer and
its application to an asymptotically nonflat spacetime | 9 pages, 7 figures; Figures 6 and 7 added, accepted by PRD | Phys. Rev. D 101, 104032 (2020) | 10.1103/PhysRevD.101.104032 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational deflection angle of light for an observer and source at
finite distance from a lens object has been studied by Ishihara et al. [Phys.
Rev. D, 94, 084015 (2016)], based on the Gauss-Bonnet theorem with using the
optical metric. Their approach to finite-distance cases is limited within an
asymptotical... | [
{
"created": "Fri, 10 Jan 2020 02:47:46 GMT",
"version": "v1"
},
{
"created": "Thu, 14 May 2020 04:50:04 GMT",
"version": "v2"
}
] | 2020-05-27 | [
[
"Takizawa",
"Keita",
""
],
[
"Ono",
"Toshiaki",
""
],
[
"Asada",
"Hideki",
""
]
] | The gravitational deflection angle of light for an observer and source at finite distance from a lens object has been studied by Ishihara et al. [Phys. Rev. D, 94, 084015 (2016)], based on the Gauss-Bonnet theorem with using the optical metric. Their approach to finite-distance cases is limited within an asymptotically... |
gr-qc/9901053 | Hisaaki Shinkai | Gen Yoneda and Hisa-aki Shinkai | Constructing hyperbolic systems in the Ashtekar formulation of general
relativity | 15 pages, RevTeX, minor changes in Introduction. published as Int. J.
Mod. Phys. D 9 (2000) 13 | Int.J.Mod.Phys. D9 (2000) 13-34 | 10.1142/S0218271800000037 | null | gr-qc math-ph math.MP | null | Hyperbolic formulations of the equations of motion are essential technique
for proving the well-posedness of the Cauchy problem of a system, and are also
helpful for implementing stable long time evolution in numerical applications.
We, here, present three kinds of hyperbolic systems in the Ashtekar formulation
of ge... | [
{
"created": "Tue, 19 Jan 1999 22:29:03 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Feb 1999 02:02:36 GMT",
"version": "v2"
},
{
"created": "Wed, 16 Jun 1999 15:32:17 GMT",
"version": "v3"
},
{
"created": "Mon, 1 May 2000 06:35:16 GMT",
"version": "v4"
}
] | 2009-10-31 | [
[
"Yoneda",
"Gen",
""
],
[
"Shinkai",
"Hisa-aki",
""
]
] | Hyperbolic formulations of the equations of motion are essential technique for proving the well-posedness of the Cauchy problem of a system, and are also helpful for implementing stable long time evolution in numerical applications. We, here, present three kinds of hyperbolic systems in the Ashtekar formulation of gene... |
2011.12841 | Juliano Neves | R. V. Maluf, Juliano C. S. Neves | Black holes with a cosmological constant in bumblebee gravity | 11 pages, 5 figures. V3 with new comments on the bumblebee potential.
Published in Physical Review D | Phys. Rev. D 103, 044002 (2021) | 10.1103/PhysRevD.103.044002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we present black hole solutions with a cosmological constant in
bumblebee gravity, which provides a mechanism for the Lorentz symmetry
violation by assuming a nonzero vacuum expectation value for the bumblebee
field. From the gravitational point of view, such solutions are spherically
symmetric black ho... | [
{
"created": "Wed, 25 Nov 2020 15:50:55 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Nov 2020 15:47:19 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Feb 2021 16:38:29 GMT",
"version": "v3"
}
] | 2021-02-02 | [
[
"Maluf",
"R. V.",
""
],
[
"Neves",
"Juliano C. S.",
""
]
] | In this work, we present black hole solutions with a cosmological constant in bumblebee gravity, which provides a mechanism for the Lorentz symmetry violation by assuming a nonzero vacuum expectation value for the bumblebee field. From the gravitational point of view, such solutions are spherically symmetric black hole... |
1006.1850 | Khaled Saaidi | Kh. Saaidi, A. Mohammadi | Brane Cosmology for Vacuum and Cosmological Constant Bulk | 13 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the cosmology of a 3-brane universe, in a five dimensional space
time (Bulk). We present some solutions to the five-dimensional Einstein
equation, where a perfect fluid is confined to the 3-brane. We investigate the
evolution of brane for two models of bulk. We choose ordinary and modified
polytropic gas ... | [
{
"created": "Wed, 9 Jun 2010 16:21:22 GMT",
"version": "v1"
}
] | 2010-06-10 | [
[
"Saaidi",
"Kh.",
""
],
[
"Mohammadi",
"A.",
""
]
] | We consider the cosmology of a 3-brane universe, in a five dimensional space time (Bulk). We present some solutions to the five-dimensional Einstein equation, where a perfect fluid is confined to the 3-brane. We investigate the evolution of brane for two models of bulk. We choose ordinary and modified polytropic gas in... |
1608.02979 | Jos\'e Villanueva | Graeme Candlish, Marco Olivares, Constanza Osses and J.R. Villanueva | Photon paths in the hyperbolic topological black hole spacetime of
conformal Weyl gravity | 13 pages, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we find analytical solutions to the null geodesics in the
hyperbolic topological black hole spacetime of conformal Weyl gravity in an
invariant $2$-plane given by the orbits of an azimuthal Killing vector. Exact
expressions for the (non-compact) horizons are found, which depend on the
cosmological consta... | [
{
"created": "Tue, 9 Aug 2016 20:23:54 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Aug 2018 05:41:52 GMT",
"version": "v2"
}
] | 2018-08-24 | [
[
"Candlish",
"Graeme",
""
],
[
"Olivares",
"Marco",
""
],
[
"Osses",
"Constanza",
""
],
[
"Villanueva",
"J. R.",
""
]
] | In this work we find analytical solutions to the null geodesics in the hyperbolic topological black hole spacetime of conformal Weyl gravity in an invariant $2$-plane given by the orbits of an azimuthal Killing vector. Exact expressions for the (non-compact) horizons are found, which depend on the cosmological constant... |
2408.06852 | Xiangdong Zhang | Yunlong Liu and Xiangdong Zhang | Analytic solutions for the motion of spinning particles near brane-world
black hole | 16 pages, 4 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | The general motion of spinning test particles to the leading order
approximation of spin in the brane-world spacetime is investigated. Analytical
integrations for the equations of motion and linear shifts in orbital frequency
are obtained. As a result, we found that both the nodal precession and the
periastron preces... | [
{
"created": "Tue, 13 Aug 2024 12:27:52 GMT",
"version": "v1"
}
] | 2024-08-14 | [
[
"Liu",
"Yunlong",
""
],
[
"Zhang",
"Xiangdong",
""
]
] | The general motion of spinning test particles to the leading order approximation of spin in the brane-world spacetime is investigated. Analytical integrations for the equations of motion and linear shifts in orbital frequency are obtained. As a result, we found that both the nodal precession and the periastron precessi... |
gr-qc/0510085 | Dag {\O}stvang | Dag {\O}stvang | Metrically Stationary, Axially Symmetric, Isolated Systems in
Quasi-Metric Gravity | 20 pages; v3: somewhat extended; v4: accepted for publication in Acta
Physica Polonica B; v5: must have non-universal gravitational coupling; v6:
minor corrections; v7: rewritten with extended theory; v9: inconsistent
equation replaced (results unaffected) | Acta Phys.Polon.B39:1849-1868,2008 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational field exterior respectively interior to an axially
symmetric, metrically stationary, isolated spinning source made of perfect
fluid is examined within the quasi-metric framework. (A metrically stationary
system is defined as a system which is stationary except for the direct effects
of the global co... | [
{
"created": "Wed, 19 Oct 2005 01:48:28 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Dec 2005 06:27:50 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Mar 2007 22:58:30 GMT",
"version": "v3"
},
{
"created": "Wed, 7 May 2008 22:33:46 GMT",
"version": "v4"
},
{
"cre... | 2024-03-25 | [
[
"Østvang",
"Dag",
""
]
] | The gravitational field exterior respectively interior to an axially symmetric, metrically stationary, isolated spinning source made of perfect fluid is examined within the quasi-metric framework. (A metrically stationary system is defined as a system which is stationary except for the direct effects of the global cosm... |
gr-qc/0509052 | D. Bar | D. Bar | Gravitational wave holography | 19 pages, 2 figures. A few misprints were corrected | Int.J.Theor.Phys.46:503-517,2007 | 10.1007/s10773-006-9108-1 | null | gr-qc | null | We represent and discuss a theory of gravitational holography in which all
the involved waves; subject, reference and illuminator are gravitational waves
(GW). Although these waves are so weak that no terrestrial experimental
set-ups, even the large LIGO, VIRGO, GEO and TAMA facilities, were able up to
now to directl... | [
{
"created": "Wed, 14 Sep 2005 22:03:34 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Aug 2007 19:46:04 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Bar",
"D.",
""
]
] | We represent and discuss a theory of gravitational holography in which all the involved waves; subject, reference and illuminator are gravitational waves (GW). Although these waves are so weak that no terrestrial experimental set-ups, even the large LIGO, VIRGO, GEO and TAMA facilities, were able up to now to directly ... |
gr-qc/0208009 | Martin Snajdr | Martin Snajdr, Valeri Frolov and Jean-Pierre DeVilliers | Scattering of a Long Cosmic String by a Rotating Black Hole | 27 pages, 14 figures, to be published in Classical and Quantum
Gravity | Class.Quant.Grav. 19 (2002) 5987-6008 | 10.1088/0264-9381/19/23/308 | null | gr-qc | null | The scattering of a straight, infinitely long string by a rotating black hole
is considered. We assume that a string is moving with velocity v and that
initially the string is parallel to the axis of rotation of the black hole. We
demonstrate that as a result of scattering, the string is displaced in the
direction pe... | [
{
"created": "Sat, 3 Aug 2002 02:52:23 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Oct 2002 07:36:55 GMT",
"version": "v2"
},
{
"created": "Sun, 3 Nov 2002 01:27:14 GMT",
"version": "v3"
}
] | 2016-08-31 | [
[
"Snajdr",
"Martin",
""
],
[
"Frolov",
"Valeri",
""
],
[
"DeVilliers",
"Jean-Pierre",
""
]
] | The scattering of a straight, infinitely long string by a rotating black hole is considered. We assume that a string is moving with velocity v and that initially the string is parallel to the axis of rotation of the black hole. We demonstrate that as a result of scattering, the string is displaced in the direction perp... |
1311.0595 | George F. R. Ellis | George F R Ellis | On the paradox of Hawking radiation in a maximally extended
Schwarzschild solution | 26 pages, 7 figures, 2 tables. arXiv admin note: text overlap with
arXiv:1310.4771 | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper considers the effect of Hawking radiation on an eternal black hole
- that is. a maximally extended Schwarzschild solution. Symmetry considerations
that hold independent of the details of the emission mechanism show there is an
inconsistency in the claim that such a blackhole evaporates away in a finite
tim... | [
{
"created": "Mon, 4 Nov 2013 06:58:47 GMT",
"version": "v1"
}
] | 2013-11-05 | [
[
"Ellis",
"George F R",
""
]
] | This paper considers the effect of Hawking radiation on an eternal black hole - that is. a maximally extended Schwarzschild solution. Symmetry considerations that hold independent of the details of the emission mechanism show there is an inconsistency in the claim that such a blackhole evaporates away in a finite time.... |
gr-qc/0612103 | Oleg Teryaev | A. J. Silenko and O. V. Teryaev | Equivalence principle and experimental tests of gravitational spin
effects | 12 pages, version to appear in Physical Review D | Phys.Rev.D76:061101,2007 | 10.1103/PhysRevD.76.061101 | null | gr-qc | null | We study the possibility of experimental testing the manifestations of
equivalence principle in spin-gravity interactions. We reconsider the earlier
experimental data and get the first experimental bound on anomalous
gravitomagnetic moment. The spin coupling to the Earth's rotation may also be
explored at the extensi... | [
{
"created": "Sun, 17 Dec 2006 15:52:32 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Sep 2007 11:12:28 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Silenko",
"A. J.",
""
],
[
"Teryaev",
"O. V.",
""
]
] | We study the possibility of experimental testing the manifestations of equivalence principle in spin-gravity interactions. We reconsider the earlier experimental data and get the first experimental bound on anomalous gravitomagnetic moment. The spin coupling to the Earth's rotation may also be explored at the extension... |
2101.08842 | Abolhassan Mohammadi | Abolhassan Mohammadi, N. Doustimotlagh, Tayeb Golanbari, Behrooz
Malakolkalami, Shahram Jalalzadeh | Null geodesic of Schwarzschild AdS with Gaussian matter distribution | 11 pages, 14 figures, typos and grammars corrections, References
added, Some typos corrected | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the best ways to understand the gravitation of a massive object is by
studying the photon's motion around it. We study the null geodesic of a regular
black hole in anti-de Sitter spacetime, including a Gaussian matter
distribution. Obtaining the effective potential and possible motions of the
photon are discus... | [
{
"created": "Thu, 21 Jan 2021 20:32:30 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Feb 2021 15:14:07 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Sep 2021 16:46:26 GMT",
"version": "v3"
}
] | 2021-09-21 | [
[
"Mohammadi",
"Abolhassan",
""
],
[
"Doustimotlagh",
"N.",
""
],
[
"Golanbari",
"Tayeb",
""
],
[
"Malakolkalami",
"Behrooz",
""
],
[
"Jalalzadeh",
"Shahram",
""
]
] | One of the best ways to understand the gravitation of a massive object is by studying the photon's motion around it. We study the null geodesic of a regular black hole in anti-de Sitter spacetime, including a Gaussian matter distribution. Obtaining the effective potential and possible motions of the photon are discusse... |
2303.04785 | Sergey Rubin | Polina Petriakova, Arkady A. Popov, Sergey G. Rubin | Flexible extra dimensions | 12 pages, 4 figures | null | 10.1140/epjc/s10052-023-11542-7 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | This paper discusses the origin of the small parameters with the aim of
explaining the Hierarchy problem. The flexible extra dimensions are an
essential tool in the process by which physical parameters are formed. The
evolution of a multidimensional metric starts at the Planck scale and is
completed with the static e... | [
{
"created": "Wed, 8 Mar 2023 18:32:47 GMT",
"version": "v1"
}
] | 2023-05-24 | [
[
"Petriakova",
"Polina",
""
],
[
"Popov",
"Arkady A.",
""
],
[
"Rubin",
"Sergey G.",
""
]
] | This paper discusses the origin of the small parameters with the aim of explaining the Hierarchy problem. The flexible extra dimensions are an essential tool in the process by which physical parameters are formed. The evolution of a multidimensional metric starts at the Planck scale and is completed with the static ext... |
1512.01451 | Ramil Izmailov | Amarjit Tamang, Alexander A. Potapov, Regina Lukmanova, Ramil Izmailov
and Kamal K. Nandi | On generalized wormhole in the Eddington inspired Born-Infeld (EiBI)
gravity | 20 pages, 3 figures | Class.Quant.Grav. 32(23) : 235028, 2015 | 10.1088/0264-9381/32/23/235028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we wish to investigate certain observable effects in the
recently obtained wormhole solution of the EiBI theory, which generalizes the
zero mass Ellis-Bronnikov wormhole of general relativity. The solutions of EiBI
theory contain an extra parameter $\kappa$ having the inverse dimension of the
cosmologi... | [
{
"created": "Thu, 3 Dec 2015 14:03:00 GMT",
"version": "v1"
}
] | 2015-12-07 | [
[
"Tamang",
"Amarjit",
""
],
[
"Potapov",
"Alexander A.",
""
],
[
"Lukmanova",
"Regina",
""
],
[
"Izmailov",
"Ramil",
""
],
[
"Nandi",
"Kamal K.",
""
]
] | In this paper, we wish to investigate certain observable effects in the recently obtained wormhole solution of the EiBI theory, which generalizes the zero mass Ellis-Bronnikov wormhole of general relativity. The solutions of EiBI theory contain an extra parameter $\kappa$ having the inverse dimension of the cosmologica... |
2108.08085 | Wojciech Kami\'nski | Wojciech Kami\'nski | Well-posedness of the ambient metric equations and stability of even
dimensional asymptotically de Sitter spacetimes | 24 pages, minor corrections, references updated | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Vanishing of the Fefferman-Graham obstruction tensor was used by Andersson
and Chru{\'s}ciel to show stability of the asymptotically de Sitter spaces in
even dimensions. However, existing proofs of hyperbolicity of this equation
contain gaps. We show in this paper that it is indeed a well-posed hyperbolic
system with... | [
{
"created": "Wed, 18 Aug 2021 10:38:30 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Mar 2022 18:38:03 GMT",
"version": "v2"
}
] | 2022-03-02 | [
[
"Kamiński",
"Wojciech",
""
]
] | Vanishing of the Fefferman-Graham obstruction tensor was used by Andersson and Chru{\'s}ciel to show stability of the asymptotically de Sitter spaces in even dimensions. However, existing proofs of hyperbolicity of this equation contain gaps. We show in this paper that it is indeed a well-posed hyperbolic system with u... |
2108.11960 | William C. C. Lima | Markus B. Fr\"ob and William C. C. Lima | Cosmological Perturbations and Invariant Observables in Geodesic
Lightcone Coordinates | 38 pages. Some discussions improved and typos corrected. Matches
published version | JCAP01(2022)034 | 10.1088/1475-7516/2022/01/034 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a recent approach to the construction of gauge-invariant
relational observables in gravity in the context of cosmological perturbation
theory. These observables are constructed using a field-dependent coordinate
system, which we take to be geodesic lightcone coordinates. We show that the
observables are g... | [
{
"created": "Thu, 26 Aug 2021 18:00:00 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Jan 2022 15:19:27 GMT",
"version": "v2"
}
] | 2022-01-20 | [
[
"Fröb",
"Markus B.",
""
],
[
"Lima",
"William C. C.",
""
]
] | We consider a recent approach to the construction of gauge-invariant relational observables in gravity in the context of cosmological perturbation theory. These observables are constructed using a field-dependent coordinate system, which we take to be geodesic lightcone coordinates. We show that the observables are gau... |
2407.08208 | Hai-Shan Liu | Hai-Shan Liu and Lei Zhang | Scalarization of Taub-NUT Black Holes in Extended
scalar-tensor-Gauss-Bonnet Theory | 19 pages, 10 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Recently, scalarization of Schwarzschild black hole are extensively studied.
In this work, we explore the scalarization of Taub-NUT black hole. The theory
we consider is the extended scalar-tensor-Gauss-Bonnet theory, which admits
Ricci-flat Taub-NUT black hole as a solution. An analysis of probe scalar field
is carr... | [
{
"created": "Thu, 11 Jul 2024 06:24:10 GMT",
"version": "v1"
}
] | 2024-07-12 | [
[
"Liu",
"Hai-Shan",
""
],
[
"Zhang",
"Lei",
""
]
] | Recently, scalarization of Schwarzschild black hole are extensively studied. In this work, we explore the scalarization of Taub-NUT black hole. The theory we consider is the extended scalar-tensor-Gauss-Bonnet theory, which admits Ricci-flat Taub-NUT black hole as a solution. An analysis of probe scalar field is carrie... |
1210.6877 | Madhavan Varadarajan | Madhavan Varadarajan | Towards an Anomaly-Free Quantum Dynamics for a Weak Coupling Limit of
Euclidean Gravity: Diffeomorphism Covariance | 56 pages, No figures | Phys.Rev. D87 (2013) 4, 044040 | 10.1103/PhysRevD.87.044040 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The G-->0 limit of Euclidean gravity introduced by Smolin is described by a
generally covariant U(1)xU(1)xU(1) gauge theory. In an earlier paper, Tomlin
and Varadarajan constructed the quantum Hamiltonian constraint of density
weight 4/3 for this U(1)xU(1)xU(1) theory so as to produce a non-trivial
anomaly free LQG-t... | [
{
"created": "Thu, 25 Oct 2012 15:35:56 GMT",
"version": "v1"
}
] | 2015-01-30 | [
[
"Varadarajan",
"Madhavan",
""
]
] | The G-->0 limit of Euclidean gravity introduced by Smolin is described by a generally covariant U(1)xU(1)xU(1) gauge theory. In an earlier paper, Tomlin and Varadarajan constructed the quantum Hamiltonian constraint of density weight 4/3 for this U(1)xU(1)xU(1) theory so as to produce a non-trivial anomaly free LQG-typ... |
gr-qc/0511150 | J. Ponce de Leon | J. Ponce de Leon | An analytic model for the transition from decelerated to accelerated
cosmic expansion | The abstract and introduction are improved and the discussion section
is expanded. A number of references are added | Int.J.Mod.Phys.D15:1237-1257,2006 | 10.1142/S0218271806008929 | null | gr-qc | null | We consider the scenario where our observable universe is devised as a
dynamical four-dimensional hypersurface embedded in a five-dimensional bulk
spacetime, with a large extra dimension, which is the {\it generalization of
the flat FRW cosmological metric to five dimensions}. This scenario generates a
simple analyti... | [
{
"created": "Tue, 29 Nov 2005 04:17:04 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Dec 2005 00:23:48 GMT",
"version": "v2"
},
{
"created": "Thu, 16 Mar 2006 05:00:38 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"de Leon",
"J. Ponce",
""
]
] | We consider the scenario where our observable universe is devised as a dynamical four-dimensional hypersurface embedded in a five-dimensional bulk spacetime, with a large extra dimension, which is the {\it generalization of the flat FRW cosmological metric to five dimensions}. This scenario generates a simple analytica... |
gr-qc/0309069 | Tiberiu Harko | M. K. Mak, T. Harko | Quark stars admitting a one-parameter group of conformal motions | 5 pages, no figures, to appear in IJMPD | Int.J.Mod.Phys. D13 (2004) 149-156 | 10.1142/S0218271804004451 | null | gr-qc | null | An exact analytical solution describing the interior of a charged strange
quark star is found under the assumption of spherical symmetry and the
existence of a one-parameter group of conformal motions. The solution describes
a unique static charged configuration of quark matter with radius $R=9.46$ km
and total mass ... | [
{
"created": "Mon, 15 Sep 2003 06:01:39 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Jan 2004 03:13:13 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Mak",
"M. K.",
""
],
[
"Harko",
"T.",
""
]
] | An exact analytical solution describing the interior of a charged strange quark star is found under the assumption of spherical symmetry and the existence of a one-parameter group of conformal motions. The solution describes a unique static charged configuration of quark matter with radius $R=9.46$ km and total mass $M... |
1011.4538 | Gabriel Abreu | Gabriel Abreu (Victoria University of Wellington), Matt Visser
(Victoria University of Wellington) | Entropy bounds for uncollapsed matter | 4 pages. Prepared for the proceedings of the Spanish Relativity
meeting (ERE2010), Granada, Spain, 6-10 Sep 2010 | J.Phys.Conf.Ser.314:012035,2011 | 10.1088/1742-6596/314/1/012035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In any static spacetime the quasilocal Tolman mass contained within a volume
can be reduced to a Gauss-like surface integral involving the flux of a
suitably defined generalized surface gravity. By introducing some basic
thermodynamics, and invoking the Unruh effect, one can then develop elementary
bounds on the quas... | [
{
"created": "Fri, 19 Nov 2010 23:59:49 GMT",
"version": "v1"
}
] | 2011-09-28 | [
[
"Abreu",
"Gabriel",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | In any static spacetime the quasilocal Tolman mass contained within a volume can be reduced to a Gauss-like surface integral involving the flux of a suitably defined generalized surface gravity. By introducing some basic thermodynamics, and invoking the Unruh effect, one can then develop elementary bounds on the quasil... |
1407.2958 | Davood Momeni Dr | Surajit Chattopadhyay, Davood Momeni, Aziza Altaibayeva, Ratbay
Myrzakulov | Can Holographic dark energy increase the mass of the wormhole? | Replaced version, in "Astrophysics and Space Science".Replaced to
remove overlaps | Astrophys.Space Sci. 356 (2015) no.1, 195-204 | 10.1007/s10509-014-2204-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we have studied accretion of dark energy (DE) onto Morris-
Thorne wormhole with three different forms, namely, holographic dark energy,
holographic Ricci dark energy and modified holographic Ricci dark energy .
Considering the scale factor in power-law form we have observed that as the
holographic dark ... | [
{
"created": "Fri, 27 Jun 2014 12:59:16 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Nov 2014 14:20:07 GMT",
"version": "v2"
},
{
"created": "Wed, 19 Nov 2014 04:25:15 GMT",
"version": "v3"
},
{
"created": "Wed, 26 Nov 2014 11:41:42 GMT",
"version": "v4"
}
] | 2018-10-09 | [
[
"Chattopadhyay",
"Surajit",
""
],
[
"Momeni",
"Davood",
""
],
[
"Altaibayeva",
"Aziza",
""
],
[
"Myrzakulov",
"Ratbay",
""
]
] | In this work, we have studied accretion of dark energy (DE) onto Morris- Thorne wormhole with three different forms, namely, holographic dark energy, holographic Ricci dark energy and modified holographic Ricci dark energy . Considering the scale factor in power-law form we have observed that as the holographic dark en... |
gr-qc/9905096 | Daniel Augusto Turolla Vanzella | Daniel A.T. Vanzella and George E.A. Matsas | Search for semiclassical-gravity effects in relativistic stars | 10 pages (REVTEX) | Phys.Rev.D61:127303,2000 | 10.1103/PhysRevD.61.127303 | IFT-P.044/99 | gr-qc astro-ph hep-ph hep-th | null | We discuss the possible influence of gravity in the neutronization process,
$p^+ e^- \to n \nu_e$, which is particularly important as a cooling mechanism
of neutron stars. Our approach is semiclassical in the sense that leptonic
fields are quantized on a classical background spacetime, while neutrons and
protons are ... | [
{
"created": "Tue, 25 May 1999 21:36:46 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Vanzella",
"Daniel A. T.",
""
],
[
"Matsas",
"George E. A.",
""
]
] | We discuss the possible influence of gravity in the neutronization process, $p^+ e^- \to n \nu_e$, which is particularly important as a cooling mechanism of neutron stars. Our approach is semiclassical in the sense that leptonic fields are quantized on a classical background spacetime, while neutrons and protons are tr... |
0705.2440 | Alejandro Corichi | Alejandro Corichi, Jose A. Zapata | Quantum Structure of Geometry: Loopy and fuzzy? | 9 pages, no figures | Int.J.Mod.Phys.D17:445-451,2008 | 10.1142/S0218271808012115 | null | gr-qc | null | In any attempt to build a quantum theory of gravity, a central issue is to
unravel the structure of space-time at the smallest scale. Of particular
relevance is the possible definition of coordinate functions within the theory
and the study of their algebraic properties, such as non-commutativity. Here we
approach th... | [
{
"created": "Wed, 16 May 2007 21:33:29 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Corichi",
"Alejandro",
""
],
[
"Zapata",
"Jose A.",
""
]
] | In any attempt to build a quantum theory of gravity, a central issue is to unravel the structure of space-time at the smallest scale. Of particular relevance is the possible definition of coordinate functions within the theory and the study of their algebraic properties, such as non-commutativity. Here we approach this... |
2008.03749 | Rance Solomon | Rance Solomon, Dejan Stojkovic | Generalizing weak gravity conjecture | null | Phys.Rev.D 102 (2020) 4, 046016 | 10.1103/PhysRevD.102.046016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The weak gravity conjecture implies the necessary existence of particles with
charge-to-mass ratio $q/m \geq 1$ so that the extremal charged black hole can
completely evaporate without leaving a dangerous stable extremal remnant while
simultaneously not revealing a naked singularity along the way. In other words,
thi... | [
{
"created": "Sun, 9 Aug 2020 15:36:23 GMT",
"version": "v1"
}
] | 2020-09-15 | [
[
"Solomon",
"Rance",
""
],
[
"Stojkovic",
"Dejan",
""
]
] | The weak gravity conjecture implies the necessary existence of particles with charge-to-mass ratio $q/m \geq 1$ so that the extremal charged black hole can completely evaporate without leaving a dangerous stable extremal remnant while simultaneously not revealing a naked singularity along the way. In other words, this ... |
1406.3916 | Tharanath R | R. Tharanath, Jishnu Suresh and V. C. Kuriakose | Phase transitions and Geometrothermodynamics of Regular black holes | 18 pages and 19 figures | null | 10.1007/s10714-015-1884-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the thermodynamics and state space geometry of regular
black hole solutions such as Bardeen black hole, Ay\'{o}n-Beato and Garc\'{i}a
black hole, Hayward black hole and Berej-Matyjasek-Trynieki-Wornowicz black
hole. We find that all these black holes show second order thermodynamic phase
transi... | [
{
"created": "Mon, 16 Jun 2014 06:47:53 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Tharanath",
"R.",
""
],
[
"Suresh",
"Jishnu",
""
],
[
"Kuriakose",
"V. C.",
""
]
] | In this paper we study the thermodynamics and state space geometry of regular black hole solutions such as Bardeen black hole, Ay\'{o}n-Beato and Garc\'{i}a black hole, Hayward black hole and Berej-Matyjasek-Trynieki-Wornowicz black hole. We find that all these black holes show second order thermodynamic phase transiti... |
2304.09163 | Shibesh Kumar Jas Pacif | Viraj Kalsariya and Shibesh Kumar Jas Pacif | Cosmo-dynamics of dark energy models resulting from a parametrization of
$H$ in $f(Q,T)$ gravity | 16 Pages, 26 Figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Our objective in this paper is to study the late-time behavior of the
universe in a model resulting from a parametrization of the Hubble parameter
($H$) in $f(Q,T)$ gravity. We have considered the flat
Friedmann-Lemaitre-Robertson-Walker (FLRW) as the background metric and
discussed the model in $f(Q,T)$ gravity, whe... | [
{
"created": "Mon, 17 Apr 2023 14:43:23 GMT",
"version": "v1"
}
] | 2023-04-19 | [
[
"Kalsariya",
"Viraj",
""
],
[
"Pacif",
"Shibesh Kumar Jas",
""
]
] | Our objective in this paper is to study the late-time behavior of the universe in a model resulting from a parametrization of the Hubble parameter ($H$) in $f(Q,T)$ gravity. We have considered the flat Friedmann-Lemaitre-Robertson-Walker (FLRW) as the background metric and discussed the model in $f(Q,T)$ gravity, where... |
1508.03634 | Leo Singer | Leo P. Singer and Larry R. Price | Rapid Bayesian position reconstruction for gravitational-wave transients | 23 pages, 12 figures, published in Phys. Rev. D | Phys. Rev. D 93, 024013 (2016) | 10.1103/PhysRevD.93.024013 | LIGO-P1500009-v8 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the next few years, Advanced LIGO and Virgo should detect
gravitational waves from binary neutron star and neutron star-black hole
mergers. These sources are also predicted to power a broad array of
electromagnetic transients. Because the electromagnetic signatures can be faint
and fade rapidly, observing them... | [
{
"created": "Fri, 14 Aug 2015 20:05:01 GMT",
"version": "v1"
},
{
"created": "Sun, 27 Sep 2015 19:44:02 GMT",
"version": "v2"
},
{
"created": "Sat, 21 Nov 2015 06:46:50 GMT",
"version": "v3"
},
{
"created": "Mon, 7 Dec 2015 22:58:47 GMT",
"version": "v4"
},
{
"cr... | 2016-01-20 | [
[
"Singer",
"Leo P.",
""
],
[
"Price",
"Larry R.",
""
]
] | Within the next few years, Advanced LIGO and Virgo should detect gravitational waves from binary neutron star and neutron star-black hole mergers. These sources are also predicted to power a broad array of electromagnetic transients. Because the electromagnetic signatures can be faint and fade rapidly, observing them h... |
2204.01879 | Kumar Shwetketu Virbhadra | K. S. Virbhadra | Distortions of images of Schwarzschild lensing | To appear in Physical Review D | Phys. Rev. D 106, 064038 (2022) | 10.1103/PhysRevD.106.064038 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We model the supermassive dark object $M87^*$ as a Schwarzschild lens and
study the variations in tangential, radial, and total (the product of
tangential and radial) magnifications of images (primary, secondary, and
relativistic) against the changes in angular source position and the ratio of
lens-source to the obse... | [
{
"created": "Mon, 4 Apr 2022 22:54:42 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Sep 2022 22:30:45 GMT",
"version": "v2"
}
] | 2022-09-23 | [
[
"Virbhadra",
"K. S.",
""
]
] | We model the supermassive dark object $M87^*$ as a Schwarzschild lens and study the variations in tangential, radial, and total (the product of tangential and radial) magnifications of images (primary, secondary, and relativistic) against the changes in angular source position and the ratio of lens-source to the observ... |
gr-qc/0512122 | Alexander Kamenshchik | M. Gaudin, V. Gorini, A. Kamenshchik, U. Moschella, V. Pasquier | Gravity of a static massless scalar field and a limiting
Schwarzschild-like geometry | 13 pages, 4 figures | Int.J.Mod.Phys. D15 (2006) 1387-1406 | 10.1142/S0218271806009121 | null | gr-qc | null | We study a set of static solutions of the Einstein equations in presence of a
massless scalar field and establish their connection to the Kantowski-Sachs
cosmological solutions based on some kind of duality transformations. The
physical properties of the limiting case of an empty hyperbolic spacetime
(pseudo-Schwarzs... | [
{
"created": "Wed, 21 Dec 2005 14:10:06 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Gaudin",
"M.",
""
],
[
"Gorini",
"V.",
""
],
[
"Kamenshchik",
"A.",
""
],
[
"Moschella",
"U.",
""
],
[
"Pasquier",
"V.",
""
]
] | We study a set of static solutions of the Einstein equations in presence of a massless scalar field and establish their connection to the Kantowski-Sachs cosmological solutions based on some kind of duality transformations. The physical properties of the limiting case of an empty hyperbolic spacetime (pseudo-Schwarzsch... |
gr-qc/9709004 | Michele Maggiore | Michele Maggiore | Massive string modes and non-singular pre-big-bang cosmology | 25 pages, Latex, 3 figures. Conceptual revisions. To be published in
Nucl. Phys. B | Nucl.Phys. B525 (1998) 413-431 | 10.1016/S0550-3213(98)00362-9 | CERN-TH/97-228 | gr-qc hep-th | null | Perturbative $\alpha '$ corrections to the low energy string effective action
have been recently found to have a potentially regularizing effect on the
singularity of the lowest order pre-big-bang solutions. Whether they actually
regularize it, however, cannot be determined working at any finite order in a
perturbati... | [
{
"created": "Tue, 2 Sep 1997 13:26:25 GMT",
"version": "v1"
},
{
"created": "Sat, 2 May 1998 13:00:29 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Maggiore",
"Michele",
""
]
] | Perturbative $\alpha '$ corrections to the low energy string effective action have been recently found to have a potentially regularizing effect on the singularity of the lowest order pre-big-bang solutions. Whether they actually regularize it, however, cannot be determined working at any finite order in a perturbative... |
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