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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1106.3879 | Todd Oliynyk | Lars Andersson, Todd A. Oliynyk, and Bernd G. Schmidt | Dynamical elastic bodies in Newtonian gravity | null | Class. Quantum Grav. 28 (2011) 235006 (35pp) | 10.1088/0264-9381/28/23/235006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Well-posedness for the initial value problem for a self-gravitating elastic
body with free boundary in Newtonian gravity is proved. In the material frame,
the Euler-Lagrange equation becomes, assuming suitable constitutive properties
for the elastic material, a fully non-linear elliptic-hyperbolic system with
boundar... | [
{
"created": "Mon, 20 Jun 2011 12:22:17 GMT",
"version": "v1"
}
] | 2012-06-28 | [
[
"Andersson",
"Lars",
""
],
[
"Oliynyk",
"Todd A.",
""
],
[
"Schmidt",
"Bernd G.",
""
]
] | Well-posedness for the initial value problem for a self-gravitating elastic body with free boundary in Newtonian gravity is proved. In the material frame, the Euler-Lagrange equation becomes, assuming suitable constitutive properties for the elastic material, a fully non-linear elliptic-hyperbolic system with boundary ... |
2005.04693 | Aurelien Barrau | Aur\'elien Barrau | A pure general relativistic non-singular bouncing origin for the
Universe | null | null | 10.1140/epjc/s10052-020-8158-5 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter, we argue that the past of the Universe, extrapolated from
standard physics and measured cosmological parameters, might be a non-singular
bounce. We also show that, in this framework, quite stringent constraints can
be put on the reheating temperature and number of inflationary e-folds,
basically fixin... | [
{
"created": "Sun, 10 May 2020 15:19:04 GMT",
"version": "v1"
},
{
"created": "Tue, 12 May 2020 18:39:41 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Jun 2020 07:19:58 GMT",
"version": "v3"
},
{
"created": "Fri, 26 Jun 2020 17:38:27 GMT",
"version": "v4"
}
] | 2020-07-15 | [
[
"Barrau",
"Aurélien",
""
]
] | In this letter, we argue that the past of the Universe, extrapolated from standard physics and measured cosmological parameters, might be a non-singular bounce. We also show that, in this framework, quite stringent constraints can be put on the reheating temperature and number of inflationary e-folds, basically fixing ... |
gr-qc/0404128 | Achamveedu Gopakumar | Thibault Damour, Achamveedu Gopakumar and Bala R. Iyer | Phasing of gravitational waves from inspiralling eccentric binaries | 49 pages, 6 figures, high quality figures upon request | Phys.Rev. D70 (2004) 064028 | 10.1103/PhysRevD.70.064028 | null | gr-qc astro-ph | null | We provide a method for analytically constructing high-accuracy templates for
the gravitational wave signals emitted by compact binaries moving in
inspiralling eccentric orbits. By contrast to the simpler problem of modeling
the gravitational wave signals emitted by inspiralling {\it circular} orbits,
which contain o... | [
{
"created": "Fri, 30 Apr 2004 14:01:31 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Damour",
"Thibault",
""
],
[
"Gopakumar",
"Achamveedu",
""
],
[
"Iyer",
"Bala R.",
""
]
] | We provide a method for analytically constructing high-accuracy templates for the gravitational wave signals emitted by compact binaries moving in inspiralling eccentric orbits. By contrast to the simpler problem of modeling the gravitational wave signals emitted by inspiralling {\it circular} orbits, which contain onl... |
0809.4352 | Anthony van Eysden | C. A. van Eysden and A. Melatos | Gravitational radiation from pulsar glitches | 28 pages | Class.Quant.Grav.25:225020,2008 | 10.1088/0264-9381/25/22/225020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The nonaxisymmetric Ekman flow excited inside a neutron star following a
rotational glitch is calculated analytically including stratification and
compressibility. For the largest glitches, the gravitational wave strain
produced by the hydrodynamic mass quadrupole moment approaches the sensitivity
range of advanced l... | [
{
"created": "Thu, 25 Sep 2008 10:02:16 GMT",
"version": "v1"
}
] | 2010-04-15 | [
[
"van Eysden",
"C. A.",
""
],
[
"Melatos",
"A.",
""
]
] | The nonaxisymmetric Ekman flow excited inside a neutron star following a rotational glitch is calculated analytically including stratification and compressibility. For the largest glitches, the gravitational wave strain produced by the hydrodynamic mass quadrupole moment approaches the sensitivity range of advanced lon... |
1203.0523 | Orfeu Bertolami | Orfeu Bertolami, Ricardo Zambujal Ferreira | Traversable Wormholes and Time Machines in non-minimally coupled
curvature-matter $f(R)$ theories | Revtex4, 7 pages. Version to match the one to appear in Physical
Review D | null | 10.1103/PhysRevD.85.104050 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain traversable wormhole and time machine solutions of the field
equations of an alternative of gravity with non-minimally curvature-matter
coupling. Our solutions exhibit a non-trivial redshift function and allow for
matter that satisfy the dominant energy condition.
| [
{
"created": "Fri, 2 Mar 2012 17:13:46 GMT",
"version": "v1"
},
{
"created": "Wed, 30 May 2012 18:01:14 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Bertolami",
"Orfeu",
""
],
[
"Ferreira",
"Ricardo Zambujal",
""
]
] | We obtain traversable wormhole and time machine solutions of the field equations of an alternative of gravity with non-minimally curvature-matter coupling. Our solutions exhibit a non-trivial redshift function and allow for matter that satisfy the dominant energy condition. |
2312.06757 | Vincent S. H. Lee | Vincent S. H. Lee, Kathryn M. Zurek, Yanbei Chen | Astronomical Image Blurring from Transversely Correlated Quantum Gravity
Fluctuations | 11 pages, 4 figures, v2: updated to match journal version,
conclusions unchanged | Phys.Rev.D 109 (2024) 8, 084005 | 10.1103/PhysRevD.109.084005 | CALT-TH-2022-039 | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum fluctuations in spacetime can, in some cases, lead to distortion in
astronomical images of faraway objects. In particular, a stochastic model of
quantum gravity predicts an accumulated fluctuation in the path length $\Delta
L$ with variance $\langle \Delta L^2\rangle\sim l_pL$ over a distance $L$,
similar to ... | [
{
"created": "Mon, 11 Dec 2023 19:00:01 GMT",
"version": "v1"
},
{
"created": "Mon, 13 May 2024 20:10:02 GMT",
"version": "v2"
},
{
"created": "Wed, 22 May 2024 22:39:36 GMT",
"version": "v3"
}
] | 2024-05-24 | [
[
"Lee",
"Vincent S. H.",
""
],
[
"Zurek",
"Kathryn M.",
""
],
[
"Chen",
"Yanbei",
""
]
] | Quantum fluctuations in spacetime can, in some cases, lead to distortion in astronomical images of faraway objects. In particular, a stochastic model of quantum gravity predicts an accumulated fluctuation in the path length $\Delta L$ with variance $\langle \Delta L^2\rangle\sim l_pL$ over a distance $L$, similar to a ... |
1812.07647 | Saurya Das | Saurya Das, Rajat K. Bhaduri | On the quantum origin of a small positive cosmological constant | 3 pages, revtex | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that Dark Matter consisting of ultralight bosons in a Bose-Einstein
condensate induces, via its quantum potential, a small positive cosmological
constant which matches the observed value. This explains its origin and why the
densities of Dark Matter and Dark Energy are approximately equal.
| [
{
"created": "Tue, 18 Dec 2018 21:27:55 GMT",
"version": "v1"
}
] | 2018-12-31 | [
[
"Das",
"Saurya",
""
],
[
"Bhaduri",
"Rajat K.",
""
]
] | We show that Dark Matter consisting of ultralight bosons in a Bose-Einstein condensate induces, via its quantum potential, a small positive cosmological constant which matches the observed value. This explains its origin and why the densities of Dark Matter and Dark Energy are approximately equal. |
gr-qc/0309058 | Leonid Grishchuk P. | D. Baskaran and L. P. Grishchuk | Components of the gravitational force in the field of a gravitational
wave | prints to 29 pages including 9 figures, new title, additional
explanations and references in response to referee's comments, to be
published in Class. Quant. Grav | Class.Quant.Grav. 21 (2004) 4041-4062 | 10.1088/0264-9381/21/17/003 | null | gr-qc astro-ph hep-th | null | Gravitational waves bring about the relative motion of free test masses. The
detailed knowledge of this motion is important conceptually and practically,
because the mirrors of laser interferometric detectors of gravitational waves
are essentially free test masses. There exists an analogy between the motion of
free m... | [
{
"created": "Thu, 11 Sep 2003 14:00:39 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Jul 2004 15:17:30 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Baskaran",
"D.",
""
],
[
"Grishchuk",
"L. P.",
""
]
] | Gravitational waves bring about the relative motion of free test masses. The detailed knowledge of this motion is important conceptually and practically, because the mirrors of laser interferometric detectors of gravitational waves are essentially free test masses. There exists an analogy between the motion of free mas... |
2405.05936 | Rodrigo Maier | Filipe Cattete Alves, Rodrigo Maier | Scalar Perturbations in Nonsingular Universes from Interacting Vacuum | null | Class. Quantum Grav. 41 125007 2024 | 10.1088/1361-6382/ad494d | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we examine the stability of scalar perturbations in nonsingular
models which emerge from an interacting vacuum component. The analysis
developed in this paper relies on two phenomenological choices for the energy
exchange between a nonrelativistic fluid and a vacuum component. In both
scenarios it can b... | [
{
"created": "Thu, 9 May 2024 17:21:17 GMT",
"version": "v1"
},
{
"created": "Thu, 23 May 2024 16:04:33 GMT",
"version": "v2"
}
] | 2024-05-24 | [
[
"Alves",
"Filipe Cattete",
""
],
[
"Maier",
"Rodrigo",
""
]
] | In this paper we examine the stability of scalar perturbations in nonsingular models which emerge from an interacting vacuum component. The analysis developed in this paper relies on two phenomenological choices for the energy exchange between a nonrelativistic fluid and a vacuum component. In both scenarios it can be ... |
1810.02825 | Antonios Tsokaros A. | Antonios Tsokaros, K\=oji Ury\=u, Stuart L. Shapiro | Complete initial value spacetimes containing black holes in general
relativity: Application to black hole-disk systems | 6 pages | Phys. Rev. D 99, 041501 (2019) | 10.1103/PhysRevD.99.041501 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new initial data formulation to solve the full set of Einstein
equations for spacetimes that contain a black hole under general conditions.
The method can be used to construct complete initial data for spacetimes (the
full metric) that contain a black hole. Contrary to most current studies the
formulatio... | [
{
"created": "Fri, 5 Oct 2018 18:00:02 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Feb 2019 06:46:25 GMT",
"version": "v2"
}
] | 2019-03-06 | [
[
"Tsokaros",
"Antonios",
""
],
[
"Uryū",
"Kōji",
""
],
[
"Shapiro",
"Stuart L.",
""
]
] | We present a new initial data formulation to solve the full set of Einstein equations for spacetimes that contain a black hole under general conditions. The method can be used to construct complete initial data for spacetimes (the full metric) that contain a black hole. Contrary to most current studies the formulation ... |
2112.07726 | Pierre-Henri Chavanis | Pierre-Henri Chavanis | Predictive model of fermionic dark matter halos with a quantum core and
an isothermal atmosphere | null | null | 10.1103/PhysRevD.106.043538 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a thermodynamical model of fermionic dark matter halos at finite
temperature. Statistical equilibrium states may be justified by a process of
violent collisionless relaxation in the sense of Lynden-Bell or from a
collisional relaxation of nongravitational origin if the fermions are
self-interacting. The mo... | [
{
"created": "Tue, 14 Dec 2021 20:08:32 GMT",
"version": "v1"
}
] | 2022-09-07 | [
[
"Chavanis",
"Pierre-Henri",
""
]
] | We develop a thermodynamical model of fermionic dark matter halos at finite temperature. Statistical equilibrium states may be justified by a process of violent collisionless relaxation in the sense of Lynden-Bell or from a collisional relaxation of nongravitational origin if the fermions are self-interacting. The most... |
0809.0274 | Eleanor Knox | Eleanor Knox | Flavour-Oscillation Clocks and the Geometricity of General Relativity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I look at the 'flavour-oscillation clocks' proposed by D.V. Ahluwalia, and
two arguments of his suggesting that such clocks might behave in a way that
threatens the geometricity of general relativity (GR). The first argument
states that the behaviour of these clocks in the vicinity of a rotating
gravitational source ... | [
{
"created": "Mon, 1 Sep 2008 15:46:15 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Jun 2009 15:45:27 GMT",
"version": "v2"
}
] | 2009-06-16 | [
[
"Knox",
"Eleanor",
""
]
] | I look at the 'flavour-oscillation clocks' proposed by D.V. Ahluwalia, and two arguments of his suggesting that such clocks might behave in a way that threatens the geometricity of general relativity (GR). The first argument states that the behaviour of these clocks in the vicinity of a rotating gravitational source im... |
1802.00177 | Avirup Ghosh | C. Fairoos, Avirup Ghosh, Sudipta Sarkar | Black Hole Entropy production and Transport coefficients in Lovelock
Gravity | 8 pages, no figures, expanded version accepted for publication in
PRD, references added, few typos corrected | Phys. Rev. D 98, 024036 (2018) | 10.1103/PhysRevD.98.024036 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the entropy evolution of black holes in Lovelock gravity by
formulating a thermodynamic generalization of null Raychaudhuri equation. We
show that the similarity between the expressions of entropy change of the black
hole horizon due to perturbation and that of a fluid, which is out of
equilibrium, transcend... | [
{
"created": "Thu, 1 Feb 2018 07:19:42 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jun 2018 05:54:35 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Jun 2018 17:25:07 GMT",
"version": "v3"
}
] | 2018-07-25 | [
[
"Fairoos",
"C.",
""
],
[
"Ghosh",
"Avirup",
""
],
[
"Sarkar",
"Sudipta",
""
]
] | We study the entropy evolution of black holes in Lovelock gravity by formulating a thermodynamic generalization of null Raychaudhuri equation. We show that the similarity between the expressions of entropy change of the black hole horizon due to perturbation and that of a fluid, which is out of equilibrium, transcends ... |
2109.14258 | Anirban Saha Dr. | Sk. Moinuddin, Pradip Mukherjee, Anirban Saha, Amit Singha Roy | Energy momentum tensor of a non-minimally coupled scalar from the
equivalence of the Einstein and Jordan frames | 13 pages, laTex, no figure | Eur. Phys. J. C 83, 446 (2023) | 10.1140/epjc/s10052-023-11619-3 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Unlike the minimally coupled gravity theory where matter is coupled with
gravity in such a manner so that one can differentiate the matter and gravity
sector uniquely, the non-minimally coupled theories (NMCT) are distinguished by
the intermingling of two. As a consequence of this the calculation of the
energy moment... | [
{
"created": "Wed, 29 Sep 2021 08:03:14 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Jun 2023 09:10:54 GMT",
"version": "v2"
}
] | 2023-06-02 | [
[
"Moinuddin",
"Sk.",
""
],
[
"Mukherjee",
"Pradip",
""
],
[
"Saha",
"Anirban",
""
],
[
"Roy",
"Amit Singha",
""
]
] | Unlike the minimally coupled gravity theory where matter is coupled with gravity in such a manner so that one can differentiate the matter and gravity sector uniquely, the non-minimally coupled theories (NMCT) are distinguished by the intermingling of two. As a consequence of this the calculation of the energy momentum... |
1607.08879 | Jose Navarro-Salas | I. Agullo, A. del Rio, J. Navarro-Salas | Electromagnetic duality anomaly in curved spacetimes | 5 pages. Typos corrected. Some points clarified. To appear in Phys.
Rev. Lett | Phys. Rev. Lett. 118, 111301 (2017) | 10.1103/PhysRevLett.118.111301 | null | gr-qc hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The source-free Maxwell action is invariant under electric-magnetic duality
rotations in arbitrary spacetimes. This leads to a conserved classical Noether
charge. We show that this conservation law is broken at the quantum level in
presence of a background classical gravitational field with a non-trivial
Chern-Pontry... | [
{
"created": "Fri, 29 Jul 2016 18:12:22 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Mar 2017 07:56:32 GMT",
"version": "v2"
}
] | 2017-03-22 | [
[
"Agullo",
"I.",
""
],
[
"del Rio",
"A.",
""
],
[
"Navarro-Salas",
"J.",
""
]
] | The source-free Maxwell action is invariant under electric-magnetic duality rotations in arbitrary spacetimes. This leads to a conserved classical Noether charge. We show that this conservation law is broken at the quantum level in presence of a background classical gravitational field with a non-trivial Chern-Pontryag... |
1912.12806 | Adel Rahman | Adel A. Rahman and Robert M. Wald | Black Hole Memory | 23 pages. v2: references and minor clarifications added; version
accepted for publication in PRD | Phys. Rev. D 101, 124010 (2020) | 10.1103/PhysRevD.101.124010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The memory effect at null infinity, $\mathcal{I}^+$, can be defined in terms
of the permanent relative displacement of test particles (at leading order in
$1/r$) resulting from the passage of a burst of gravitational radiation. In
$D=4$ spacetime dimensions, the memory effect can be characterized by the
supertranslat... | [
{
"created": "Mon, 30 Dec 2019 04:11:51 GMT",
"version": "v1"
},
{
"created": "Tue, 5 May 2020 00:16:12 GMT",
"version": "v2"
}
] | 2020-07-01 | [
[
"Rahman",
"Adel A.",
""
],
[
"Wald",
"Robert M.",
""
]
] | The memory effect at null infinity, $\mathcal{I}^+$, can be defined in terms of the permanent relative displacement of test particles (at leading order in $1/r$) resulting from the passage of a burst of gravitational radiation. In $D=4$ spacetime dimensions, the memory effect can be characterized by the supertranslatio... |
1811.08744 | Gregorio Carullo | Gregorio Carullo, Gunnar Riemenschneider, Ka Wa Tsang, Alessandro
Nagar, Walter Del Pozzo | GW150914 peak frequency: a novel consistency test of strong-field
General Relativity | 7 pages, 2 figures | Classical and Quantum Gravity 36 105009 (2019) | 10.1088/1361-6382/ab185e | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a novel test of General Relativity in the strong-field regime of
a binary black hole coalescence. Combining information coming from Numerical
Relativity simulations of coalescing black hole binaries with a Bayesian
reconstruction of the gravitational wave signal detected in LIGO-Virgo
interferometric dat... | [
{
"created": "Wed, 21 Nov 2018 14:15:51 GMT",
"version": "v1"
},
{
"created": "Thu, 2 May 2019 14:28:02 GMT",
"version": "v2"
}
] | 2019-05-03 | [
[
"Carullo",
"Gregorio",
""
],
[
"Riemenschneider",
"Gunnar",
""
],
[
"Tsang",
"Ka Wa",
""
],
[
"Nagar",
"Alessandro",
""
],
[
"Del Pozzo",
"Walter",
""
]
] | We introduce a novel test of General Relativity in the strong-field regime of a binary black hole coalescence. Combining information coming from Numerical Relativity simulations of coalescing black hole binaries with a Bayesian reconstruction of the gravitational wave signal detected in LIGO-Virgo interferometric data,... |
1603.03312 | Joao Magueijo | Niayesh Afshordi and Joao Magueijo | The critical geometry of a thermal big bang | null | Phys. Rev. D 94, 101301 (2016) | 10.1103/PhysRevD.94.101301 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the space of scalar-tensor theories containing two
non-conformalmetrics, and find a discontinuity pointing to a "critical"
cosmological solution. Due to the different maximal speeds of propagation for
matter and gravity,the cosmological fluctuations start off inside the horizon
even without inflation, and ... | [
{
"created": "Wed, 9 Mar 2016 18:31:02 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Nov 2016 11:00:52 GMT",
"version": "v2"
}
] | 2016-11-23 | [
[
"Afshordi",
"Niayesh",
""
],
[
"Magueijo",
"Joao",
""
]
] | We explore the space of scalar-tensor theories containing two non-conformalmetrics, and find a discontinuity pointing to a "critical" cosmological solution. Due to the different maximal speeds of propagation for matter and gravity,the cosmological fluctuations start off inside the horizon even without inflation, and wi... |
gr-qc/9508028 | Stephen R. Lau | Stephen R. Lau (Technische Universitaet Wien) | On the Canonical Reduction of Spherically Symmetric Gravity | Revtex, 35 pages, no figures | Class.Quant.Grav.13:1541-1570,1996 | 10.1088/0264-9381/13/6/020 | TUW-95-21. Revised version contains (1) much improved notation, (2)
several repaired minus signs, (3) new references, and (4) some extra
discussion devoted to previously overlooked points concerning this work and
its main reference. To appear in Classical and Quantum Gravity | gr-qc | null | In a thorough paper Kuchar has examined the canonical reduction of the most
general action functional describing the geometrodynamics of the maximally
extended Schwarzschild geometry. This reduction yields the true degrees of
freedom for (vacuum) spherically symmetric general relativity. The essential
technical ingre... | [
{
"created": "Fri, 11 Aug 1995 13:42:13 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Aug 1995 17:19:08 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Feb 1996 19:05:43 GMT",
"version": "v3"
}
] | 2010-11-19 | [
[
"Lau",
"Stephen R.",
"",
"Technische Universitaet Wien"
]
] | In a thorough paper Kuchar has examined the canonical reduction of the most general action functional describing the geometrodynamics of the maximally extended Schwarzschild geometry. This reduction yields the true degrees of freedom for (vacuum) spherically symmetric general relativity. The essential technical ingredi... |
0803.1052 | Helmut Friedrich | Helmut Friedrich | Families of conformally related asymptotically flat, static vacuum data | 18 pages | Class.Quant.Grav.25:135012,2008 | 10.1088/0264-9381/25/13/135012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extending the results of an earlier article we give a complete description of
the asymptotically flat, conformally non-flat, static vacuum data which admit
non-trivial, asymptotically smooth conformal mappings onto other such data.
These data form a 3-parameter family which decomposes into 1-parameter families
of dat... | [
{
"created": "Fri, 7 Mar 2008 10:39:29 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Friedrich",
"Helmut",
""
]
] | Extending the results of an earlier article we give a complete description of the asymptotically flat, conformally non-flat, static vacuum data which admit non-trivial, asymptotically smooth conformal mappings onto other such data. These data form a 3-parameter family which decomposes into 1-parameter families of data ... |
1603.01853 | Andrea Addazi AndAdd | Andrea Addazi and Antonino Marciano and Stephon Alexander | A Unified picture of Dark Matter and Dark Energy from Invisible QCD | arXiv admin note: text overlap with arXiv:1602.06557 | null | null | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown in a companion paper that the late time acceleration of the
universe can be accounted for by an extension of the QCD color to a $SU(3)$
invisible sector (IQCD). In this work we discuss a unified framework such the
scale of dark chiral-breaking dictates both the accelerated expansion of the
universe,... | [
{
"created": "Sun, 6 Mar 2016 18:25:14 GMT",
"version": "v1"
}
] | 2016-03-16 | [
[
"Addazi",
"Andrea",
""
],
[
"Marciano",
"Antonino",
""
],
[
"Alexander",
"Stephon",
""
]
] | It has been shown in a companion paper that the late time acceleration of the universe can be accounted for by an extension of the QCD color to a $SU(3)$ invisible sector (IQCD). In this work we discuss a unified framework such the scale of dark chiral-breaking dictates both the accelerated expansion of the universe, a... |
gr-qc/9707055 | null | Vladimir S. Mashkevich (Institute of Physics, Kiev) | Conservative Model of Black Hole and Lifting of the Information Loss
Paradox | 8 pages, LATEX 2.09 | null | null | IP 10/97 | gr-qc hep-th | null | The conservative model of a black hole is advanced. The model incorporates
conservation laws such as those of baryon and lepton numbers, which lifts the
information loss paradox. A scenario of black hole evaporation is considered.
Keywords: entropy, emission, radiation, universe, chemical potential
| [
{
"created": "Sat, 26 Jul 1997 23:28:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mashkevich",
"Vladimir S.",
"",
"Institute of Physics, Kiev"
]
] | The conservative model of a black hole is advanced. The model incorporates conservation laws such as those of baryon and lepton numbers, which lifts the information loss paradox. A scenario of black hole evaporation is considered. Keywords: entropy, emission, radiation, universe, chemical potential |
1207.3043 | Kuantay Boshkayev | Kuantay Boshkayev, Hernando Quevedo and Remo Ruffini | Gravitational field of compact objects in general relativity | 15 pages, published in Phys. Rev. D.:
http://prd.aps.org/pdf/PRD/v86/i6/e064043 | Physical Review D 86, 064043 (2012) | 10.1103/PhysRevD.86.064043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study some exact and approximate solutions of Einstein's equations that
can be used to describe the gravitational field of astrophysical compact
objects in the limiting case of slow rotation and slight deformation. First, we
show that none of the standard models obtained by using Fock's method can be
used as an in... | [
{
"created": "Thu, 12 Jul 2012 18:10:13 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Oct 2012 18:23:09 GMT",
"version": "v2"
}
] | 2012-10-08 | [
[
"Boshkayev",
"Kuantay",
""
],
[
"Quevedo",
"Hernando",
""
],
[
"Ruffini",
"Remo",
""
]
] | We study some exact and approximate solutions of Einstein's equations that can be used to describe the gravitational field of astrophysical compact objects in the limiting case of slow rotation and slight deformation. First, we show that none of the standard models obtained by using Fock's method can be used as an inte... |
gr-qc/9705015 | Gungwong Kang | Gungwon Kang | Quantum Ergoregion Instability | 10 pages, latex, one epsfig, to appear in the Proceedings of the
APCTP Winter School on Duality of String Theory, Korea, Feb. 17-28, 1997; a
brief version of gr-qc/9701040 with slightly different presentation | null | 10.1142/9789814447287_0014 | null | gr-qc | null | We have shown that, as in the case of black holes, an ergosphere itself with
no event horizon inside can evaporate spontaneously, giving energy radiation to
spatial infinity until the ergoregion disappears. However, the feature of his
quantum ergoregion instability is very much different from black hole
radiation. It... | [
{
"created": "Fri, 9 May 1997 07:05:56 GMT",
"version": "v1"
}
] | 2016-11-03 | [
[
"Kang",
"Gungwon",
""
]
] | We have shown that, as in the case of black holes, an ergosphere itself with no event horizon inside can evaporate spontaneously, giving energy radiation to spatial infinity until the ergoregion disappears. However, the feature of his quantum ergoregion instability is very much different from black hole radiation. It i... |
1810.01232 | Charles Wang | Charles H.-T. Wang, Daniel P. F. Rodrigues | Closing the gaps in quantum space and time: Conformally augmented gauge
structure of gravitation | 35 pages (8 pages main text, 27 pages supplementary material);
Published version | Phys. Rev. D 98, 124041 (2018) | 10.1103/PhysRevD.98.124041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new framework of loop quantization that assimilates conformal and scale
invariance is constructed and is found to be applicable to a large class of
physically important theories of gravity and gravity-matter systems. They
include general relativity and scale-invariant scalar-tensor and dilaton
theories. Consequentl... | [
{
"created": "Tue, 2 Oct 2018 13:34:43 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Dec 2018 15:00:38 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Dec 2018 17:16:04 GMT",
"version": "v3"
}
] | 2019-01-02 | [
[
"Wang",
"Charles H. -T.",
""
],
[
"Rodrigues",
"Daniel P. F.",
""
]
] | A new framework of loop quantization that assimilates conformal and scale invariance is constructed and is found to be applicable to a large class of physically important theories of gravity and gravity-matter systems. They include general relativity and scale-invariant scalar-tensor and dilaton theories. Consequently,... |
1706.03884 | Wen-Biao Han | Ran Cheng, Wen-Biao Han | Accurate recalibated waveforms for extreme-mass-ratio inspirals in
effective-one-body frame | 22, 10 tables, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | How to calculate the gravitational waves (GWs) of
Extreme-mass-ratio-inspirals (EMRIs) in a highly accurate and efficient way
still keeps a challenge. In this paper, we present a so-called fully
recalibrated waveforms for EMRIs with high accuracy. Based on the numerical
data by solving the Teukolsky equations, we rec... | [
{
"created": "Tue, 13 Jun 2017 01:19:36 GMT",
"version": "v1"
}
] | 2017-06-14 | [
[
"Cheng",
"Ran",
""
],
[
"Han",
"Wen-Biao",
""
]
] | How to calculate the gravitational waves (GWs) of Extreme-mass-ratio-inspirals (EMRIs) in a highly accurate and efficient way still keeps a challenge. In this paper, we present a so-called fully recalibrated waveforms for EMRIs with high accuracy. Based on the numerical data by solving the Teukolsky equations, we recal... |
1609.09781 | Ivan Debono | Ivan Debono and George F. Smoot | General Relativity and Cosmology: Unsolved Questions and Future
Directions | 82 pages, 8 figures | Universe. 2016; 2(4):23 | 10.3390/universe2040023 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For the last 100 years, General Relativity (GR) has taken over the
gravitational theory mantle held by Newtonian Gravity for the previous 200
years. This article reviews the status of GR in terms of its self-consistency,
completeness, and the evidence provided by observations, which have allowed GR
to remain the cham... | [
{
"created": "Wed, 28 Sep 2016 11:23:55 GMT",
"version": "v1"
}
] | 2016-10-03 | [
[
"Debono",
"Ivan",
""
],
[
"Smoot",
"George F.",
""
]
] | For the last 100 years, General Relativity (GR) has taken over the gravitational theory mantle held by Newtonian Gravity for the previous 200 years. This article reviews the status of GR in terms of its self-consistency, completeness, and the evidence provided by observations, which have allowed GR to remain the champi... |
1011.0814 | Valentin Gladush | Valentin D. Gladush and Alexander I. Petrusenko | On the effective actions for the spherical charged dust shell in General
Relativity | 16 pages | Acta Phys. Pol. B 43, 3 (2012) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A simple and direct, based on the equations of motion, derivation of the
variational principle and effective actions for a spherical charged dust shell
in general relativity is offered. This principle is based on the relativistic
version of the D{\AE}Alembert principle of virtual displacements and leads to
the effect... | [
{
"created": "Wed, 3 Nov 2010 08:03:39 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Dec 2010 13:07:13 GMT",
"version": "v2"
},
{
"created": "Tue, 7 May 2013 08:50:25 GMT",
"version": "v3"
}
] | 2013-05-08 | [
[
"Gladush",
"Valentin D.",
""
],
[
"Petrusenko",
"Alexander I.",
""
]
] | A simple and direct, based on the equations of motion, derivation of the variational principle and effective actions for a spherical charged dust shell in general relativity is offered. This principle is based on the relativistic version of the D{\AE}Alembert principle of virtual displacements and leads to the effectiv... |
2407.16916 | Chikun Ding | Chikun Ding, Changqing Liu, Yuehua Xiao and Jun Chen | Phantom black holes and wormholes in Einstein-bumblebee gravity | 14 pages, 2 tables | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper we study Einstein-bumblebee gravity theory minimally coupled
with external matter -- a phantom/non-phantom(conventional) scalar field, find
that these scalar fields can affect the black hole solutions, i.e., giving a
hair to a black hole. In this model, the contents of the scalar field and the
forms of ... | [
{
"created": "Wed, 24 Jul 2024 00:27:08 GMT",
"version": "v1"
}
] | 2024-07-25 | [
[
"Ding",
"Chikun",
""
],
[
"Liu",
"Changqing",
""
],
[
"Xiao",
"Yuehua",
""
],
[
"Chen",
"Jun",
""
]
] | In this paper we study Einstein-bumblebee gravity theory minimally coupled with external matter -- a phantom/non-phantom(conventional) scalar field, find that these scalar fields can affect the black hole solutions, i.e., giving a hair to a black hole. In this model, the contents of the scalar field and the forms of it... |
1906.04360 | Pedro Ca\~nate Casseres | Pedro Ca\~nate, Nora Breton and Leonardo Ortiz | (2+1)-dimensional Static Cyclic Symmetric Traversable Wormhole:
Quasinormal Modes and Causality | 18 pages, 6 figures, Minor changes | null | 10.1088/1361-6382/ab6859 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study a static cyclic symmetric traversable wormhole in
$(2+1)-$dimensional gravity coupled to nonlinear electrodynamics in anti-de
Sitter spacetime. The solution is characterized by three parameters: mass $M$,
cosmological constant $\Lambda$ and one electromagnetic parameter,
$q_{\alpha}$. The causa... | [
{
"created": "Tue, 11 Jun 2019 02:44:27 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Oct 2019 14:21:32 GMT",
"version": "v2"
}
] | 2020-04-08 | [
[
"Cañate",
"Pedro",
""
],
[
"Breton",
"Nora",
""
],
[
"Ortiz",
"Leonardo",
""
]
] | In this paper we study a static cyclic symmetric traversable wormhole in $(2+1)-$dimensional gravity coupled to nonlinear electrodynamics in anti-de Sitter spacetime. The solution is characterized by three parameters: mass $M$, cosmological constant $\Lambda$ and one electromagnetic parameter, $q_{\alpha}$. The causali... |
2107.03283 | Mehdi Shokri | M. Shokri, J. Sadeghi and M. R. Setare | Constant-roll inflation from a fermionic field | 7 pages, 2 figures | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/publicdomain/zero/1.0/ | We study the inflationary period driven by a fermionic field which is
non-minimally coupled to gravity in the context of the constant-roll approach.
We consider the model for a specific form of coupling and perform the
corresponding inflationary analysis. By comparing the result with the Planck
observations coming fr... | [
{
"created": "Mon, 28 Jun 2021 06:37:37 GMT",
"version": "v1"
}
] | 2021-07-08 | [
[
"Shokri",
"M.",
""
],
[
"Sadeghi",
"J.",
""
],
[
"Setare",
"M. R.",
""
]
] | We study the inflationary period driven by a fermionic field which is non-minimally coupled to gravity in the context of the constant-roll approach. We consider the model for a specific form of coupling and perform the corresponding inflationary analysis. By comparing the result with the Planck observations coming from... |
1803.06368 | Dario Bettoni | Luca Amendola, Dario Bettoni, Guillem Dom\`enech, Adalto R. Gomes | Doppelg\"anger dark energy: modified gravity with non-universal
couplings after GW170817 | 27 pages, no figures, published version, updated references | null | 10.1088/1475-7516/2018/06/029 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational Wave (GW) astronomy severely narrowed down the theoretical
space for scalar-tensor theories. We propose a new class of attractor models
for Horndeski action in which GWs propagate at the speed of light in the nearby
universe but not in the past. To do so we derive new solutions to the
interacting dark s... | [
{
"created": "Fri, 16 Mar 2018 18:34:57 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jun 2018 15:07:23 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Feb 2019 11:22:52 GMT",
"version": "v3"
}
] | 2019-02-18 | [
[
"Amendola",
"Luca",
""
],
[
"Bettoni",
"Dario",
""
],
[
"Domènech",
"Guillem",
""
],
[
"Gomes",
"Adalto R.",
""
]
] | Gravitational Wave (GW) astronomy severely narrowed down the theoretical space for scalar-tensor theories. We propose a new class of attractor models for Horndeski action in which GWs propagate at the speed of light in the nearby universe but not in the past. To do so we derive new solutions to the interacting dark sec... |
gr-qc/9804019 | Enzo Leguizamon | Mirta S. Iriondo, Enzo O. Leguizamon and Oscar A. Reula | On the dynamics of Einstein's equations in the Ashtekar formulation | 29 pages (published version) | Adv.Theor.Math.Phys.2:1075-1103,1998 | null | null | gr-qc | null | We study the dynamics of Einstein's equations in Ashtekar's variables from
the point of view of the theory of hyperbolic systems of evolution equations.
We extend previous results and show that by a suitable modification of the
Hamiltonian vector flow outside the sub-manifold of real and constrained
solutions, a symm... | [
{
"created": "Mon, 6 Apr 1998 19:56:58 GMT",
"version": "v1"
},
{
"created": "Fri, 8 May 1998 14:22:10 GMT",
"version": "v2"
},
{
"created": "Fri, 29 May 1998 22:47:06 GMT",
"version": "v3"
},
{
"created": "Wed, 31 Mar 1999 22:37:47 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"Iriondo",
"Mirta S.",
""
],
[
"Leguizamon",
"Enzo O.",
""
],
[
"Reula",
"Oscar A.",
""
]
] | We study the dynamics of Einstein's equations in Ashtekar's variables from the point of view of the theory of hyperbolic systems of evolution equations. We extend previous results and show that by a suitable modification of the Hamiltonian vector flow outside the sub-manifold of real and constrained solutions, a symmet... |
gr-qc/9805044 | David I. Santiago | David I. Santiago, Dimitri Kalligas, and Robert V. Wagoner | Scalar-Tensor Cosmologies and their Late Time Evolution | 23 pages, no figures. Submitted for publicatiom in Phys. Rev, D15 | Phys.Rev.D58:124005,1998 | 10.1103/PhysRevD.58.124005 | null | gr-qc astro-ph | null | We study the asymptotic behavior at late times of Friedmann-Robertson-Walker
(uniform density) cosmological models within scalar-tensor theories of gravity.
Particularly, we analyze the late time behavior in the present (matter
dominated) epoch of the universe. The result of Damour and Nordtvedt that for a
massless s... | [
{
"created": "Wed, 13 May 1998 07:49:41 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Santiago",
"David I.",
""
],
[
"Kalligas",
"Dimitri",
""
],
[
"Wagoner",
"Robert V.",
""
]
] | We study the asymptotic behavior at late times of Friedmann-Robertson-Walker (uniform density) cosmological models within scalar-tensor theories of gravity. Particularly, we analyze the late time behavior in the present (matter dominated) epoch of the universe. The result of Damour and Nordtvedt that for a massless sca... |
1311.4024 | Narayan Banerjee | Ankan Mukherjee and Narayan Banerjee | A Reconstruction of Quintessence Dark Energy | null | Eur. Phys. J. Plus (2015) 130: 201 | 10.1140/epjp/i2015-15201-7 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With a parametric form of the equation of state parameter of dark energy, a
quintessence potential has been reconstructed. The potential is found to be a
generalization of a double exponential potential. The constraints on the
parameters are obtained by maximum likelihood analysis using observational
Hubble data, typ... | [
{
"created": "Sat, 16 Nov 2013 06:30:45 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jan 2016 09:23:38 GMT",
"version": "v2"
}
] | 2016-01-20 | [
[
"Mukherjee",
"Ankan",
""
],
[
"Banerjee",
"Narayan",
""
]
] | With a parametric form of the equation of state parameter of dark energy, a quintessence potential has been reconstructed. The potential is found to be a generalization of a double exponential potential. The constraints on the parameters are obtained by maximum likelihood analysis using observational Hubble data, type ... |
1211.4376 | Igor Tanatarov | I. V. Tanatarov and O. B. Zaslavskii | What happens to Petrov classification on horizons of axisymmetric dirty
black holes | 41 pages. Expanded motivation for considering both FO and OO frames,
clarified exposition and improved terminilogy, added section on different
singular boosts | J. Math. Phys. 55, 022502 (2014) | 10.1063/1.4865995 | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider axisymmetric stationary dirty black holes with regular
non-extremal or extremal horizons, and compute their on-horizon Petrov types.
The Petrov type (PT) in the frame of the observer crossing the horizon can be
different from that formally obtained in the usual (but singular in the horizon
limit) frame of... | [
{
"created": "Mon, 19 Nov 2012 11:58:05 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Apr 2013 20:48:26 GMT",
"version": "v2"
},
{
"created": "Thu, 29 Aug 2013 13:01:26 GMT",
"version": "v3"
}
] | 2014-02-28 | [
[
"Tanatarov",
"I. V.",
""
],
[
"Zaslavskii",
"O. B.",
""
]
] | We consider axisymmetric stationary dirty black holes with regular non-extremal or extremal horizons, and compute their on-horizon Petrov types. The Petrov type (PT) in the frame of the observer crossing the horizon can be different from that formally obtained in the usual (but singular in the horizon limit) frame of a... |
2406.18225 | Christopher Reyes | Christopher Reyes, Jeremy Sakstein | Neutron Stars in Aether Scalar-Tensor Theory | 10 pages, 3 figures | null | null | null | gr-qc astro-ph.CO astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Aether Scalar-Tensor theory is a modification of general relativity proposed
to explain galactic and cosmological mass discrepancies conventionally
attributed to dark matter. The theory is able to fit the cosmic microwave
background and the linear matter power spectrum without dark matter. In this
work, we derive the... | [
{
"created": "Wed, 26 Jun 2024 10:14:47 GMT",
"version": "v1"
}
] | 2024-06-27 | [
[
"Reyes",
"Christopher",
""
],
[
"Sakstein",
"Jeremy",
""
]
] | Aether Scalar-Tensor theory is a modification of general relativity proposed to explain galactic and cosmological mass discrepancies conventionally attributed to dark matter. The theory is able to fit the cosmic microwave background and the linear matter power spectrum without dark matter. In this work, we derive the T... |
gr-qc/9807042 | Petr Hajicek | P. Hajicek | Black hole interacting with matter as a simple dynamical system | Latex, no figures, 26 pages | J.Math.Phys. 40 (1999) 318-339 | 10.1063/1.532774 | null | gr-qc | null | Recently, a variational principle has been derived from Einstein-Hilbert and
a matter Lagrangian for the spherically symmetric system of a dust shell and a
black hole. The so-called physical region of the phase space, which contains
all physically meaningful states of the system defined by the variational
principle, ... | [
{
"created": "Thu, 16 Jul 1998 13:40:54 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Hajicek",
"P.",
""
]
] | Recently, a variational principle has been derived from Einstein-Hilbert and a matter Lagrangian for the spherically symmetric system of a dust shell and a black hole. The so-called physical region of the phase space, which contains all physically meaningful states of the system defined by the variational principle, is... |
1612.06378 | Giulia Gubitosi | Francesco Brighenti, Giulia Gubitosi, Joao Magueijo | Primordial perturbations in a rainbow universe with running Newton
constant | 7 pages, 2 figures | Phys. Rev. D 95, 063534 (2017) | 10.1103/PhysRevD.95.063534 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the spectral index of primordial perturbations in a rainbow
universe. We allow the Newton constant $G$ to run at (super-)Planckian energies
and we consider both vacuum and thermal perturbations. If the rainbow metric is
the one associated to a generalized Horava-Lifshitz dispersion relation, we
find that o... | [
{
"created": "Mon, 19 Dec 2016 18:31:49 GMT",
"version": "v1"
}
] | 2017-04-05 | [
[
"Brighenti",
"Francesco",
""
],
[
"Gubitosi",
"Giulia",
""
],
[
"Magueijo",
"Joao",
""
]
] | We compute the spectral index of primordial perturbations in a rainbow universe. We allow the Newton constant $G$ to run at (super-)Planckian energies and we consider both vacuum and thermal perturbations. If the rainbow metric is the one associated to a generalized Horava-Lifshitz dispersion relation, we find that onl... |
0809.0629 | Erich Gaertig | Erich Gaertig and Kostas D. Kokkotas | Oscillations of rapidly rotating relativistic stars | this article will be published in Physical Review D | Phys.Rev.D78:064063,2008 | 10.1103/PhysRevD.78.064063 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Non-axisymmetric oscillations of rapidly rotating relativistic stars are
studied using the Cowling approximation. The oscillation spectra have been
estimated by Fourier transforming the evolution equations describing the
perturbations. This is the first study of its kind and provides information on
the effect of fast... | [
{
"created": "Wed, 3 Sep 2008 14:08:59 GMT",
"version": "v1"
}
] | 2009-09-29 | [
[
"Gaertig",
"Erich",
""
],
[
"Kokkotas",
"Kostas D.",
""
]
] | Non-axisymmetric oscillations of rapidly rotating relativistic stars are studied using the Cowling approximation. The oscillation spectra have been estimated by Fourier transforming the evolution equations describing the perturbations. This is the first study of its kind and provides information on the effect of fast r... |
0912.4255 | Pinkesh Patel | P. Patel, X. Siemens, R. Dupuis, J. Betzwieser | Implementation of barycentric resampling for continuous wave searches in
gravitational wave data | 10 pages, 3 figures | Phys.Rev.D81:084032,2010 | 10.1103/PhysRevD.81.084032 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe an efficient implementation of a coherent statistic for
continuous gravitational wave searches from neutron stars. The algorithm works
by transforming the data taken by a gravitational wave detector from a moving
Earth bound frame to one that sits at the Solar System barycenter. Many
practical difficultie... | [
{
"created": "Mon, 21 Dec 2009 20:59:53 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Jan 2010 00:40:40 GMT",
"version": "v2"
}
] | 2010-05-12 | [
[
"Patel",
"P.",
""
],
[
"Siemens",
"X.",
""
],
[
"Dupuis",
"R.",
""
],
[
"Betzwieser",
"J.",
""
]
] | We describe an efficient implementation of a coherent statistic for continuous gravitational wave searches from neutron stars. The algorithm works by transforming the data taken by a gravitational wave detector from a moving Earth bound frame to one that sits at the Solar System barycenter. Many practical difficulties ... |
1808.06188 | Salvatore Capozziello | Salvatore Capozziello, Mohsen Khodadi, and Gaetano Lambiase | The quark chemical potential of QCD phase transition and the stochastic
background of gravitational waves | 12 pages, 4 figures, to appear in Phys. Lett. B | Phys.Lett. B789 (2019) 626-633 | 10.1016/j.physletb.2019.01.004 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of stochastic background of gravitational waves (GWs), produced
by cosmological phase transitions (PTs), is of fundamental importance because
allows to probe the physics related to PT energy scales. Motivated by the
decisive role of non-zero quark chemical potential towards understanding
physics in the ... | [
{
"created": "Sun, 19 Aug 2018 08:53:43 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Aug 2018 18:01:11 GMT",
"version": "v2"
},
{
"created": "Sat, 20 Oct 2018 14:41:47 GMT",
"version": "v3"
},
{
"created": "Sun, 6 Jan 2019 08:53:26 GMT",
"version": "v4"
}
] | 2019-01-23 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Khodadi",
"Mohsen",
""
],
[
"Lambiase",
"Gaetano",
""
]
] | The detection of stochastic background of gravitational waves (GWs), produced by cosmological phase transitions (PTs), is of fundamental importance because allows to probe the physics related to PT energy scales. Motivated by the decisive role of non-zero quark chemical potential towards understanding physics in the co... |
1702.07744 | Marko Vojinovic | Nikola Paunkovic and Marko Vojinovic | Gauge protected entanglement between gravity and matter | v4: published version, 30 pages | Class. Quant. Grav. 35, 185015 (2018) | 10.1088/1361-6382/aad7f1 | null | gr-qc hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that gravity and matter fields are generically entangled, as a
consequence of the local Poincar\'e symmetry. First, we present a general
argument, applicable to any particular theory of quantum gravity with matter,
by performing the analysis in the abstract nonperturbative canonical framework,
demonstrating t... | [
{
"created": "Fri, 24 Feb 2017 20:09:13 GMT",
"version": "v1"
},
{
"created": "Wed, 3 May 2017 11:35:17 GMT",
"version": "v2"
},
{
"created": "Thu, 27 Jul 2017 16:03:17 GMT",
"version": "v3"
},
{
"created": "Wed, 29 Aug 2018 22:29:13 GMT",
"version": "v4"
}
] | 2018-08-31 | [
[
"Paunkovic",
"Nikola",
""
],
[
"Vojinovic",
"Marko",
""
]
] | We show that gravity and matter fields are generically entangled, as a consequence of the local Poincar\'e symmetry. First, we present a general argument, applicable to any particular theory of quantum gravity with matter, by performing the analysis in the abstract nonperturbative canonical framework, demonstrating the... |
0904.0982 | Alexandru Ionescu | S. Alexakis, A. D. Ionescu, S. Klainerman | Uniqueness of smooth stationary black holes in vacuum: small
perturbations of the Kerr spaces | null | Commun.Math.Phys.299:89-127,2010 | 10.1007/s00220-010-1072-1 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove that a regular stationary black-hole solution of the Einstein vacuum
equations which is "close" to some Kerr solution is, in fact, isometric to that
Kerr solution.
| [
{
"created": "Mon, 6 Apr 2009 18:15:02 GMT",
"version": "v1"
}
] | 2014-11-18 | [
[
"Alexakis",
"S.",
""
],
[
"Ionescu",
"A. D.",
""
],
[
"Klainerman",
"S.",
""
]
] | We prove that a regular stationary black-hole solution of the Einstein vacuum equations which is "close" to some Kerr solution is, in fact, isometric to that Kerr solution. |
1612.04179 | Yi Zhong | Yi Zhong and Emilio Elizalde | De Sitter and power-law solutions in some models of modified gravity | 10 pages | Mod. Phys. Lett. A 31, 1650221 (2016) | 10.1142/S0217732316502217 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inspired by some recent works of Lovelock Brans-Dicke gravity and mimetic
gravity, cosmology solutions in extensions of these two modified gravities are
investigated. A non-local term is added to the Lovelock Brans-Dicke action and
Gauss-Bonnet terms to the mimetic action,correspondingly. De Sitter and power
scale fa... | [
{
"created": "Tue, 13 Dec 2016 13:58:22 GMT",
"version": "v1"
}
] | 2016-12-14 | [
[
"Zhong",
"Yi",
""
],
[
"Elizalde",
"Emilio",
""
]
] | Inspired by some recent works of Lovelock Brans-Dicke gravity and mimetic gravity, cosmology solutions in extensions of these two modified gravities are investigated. A non-local term is added to the Lovelock Brans-Dicke action and Gauss-Bonnet terms to the mimetic action,correspondingly. De Sitter and power scale fact... |
1403.4529 | Jaume Haro | Jaume de Haro | How can holonomy corrections be introduced in $f(R)$ gravity? | null | EPL 107 29001 (2014) | 10.1209/0295-5075/107/29001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the introduction of holonomy corrections in $f(R)$ gravity. We will
show that there are infinitely many ways, as many as canonical transformations,
to introduce this kind of corrections, depending on the canonical variables
(two coordinates and its conjugate momenta) used to obtain the Hamiltonian. In
each c... | [
{
"created": "Tue, 18 Mar 2014 16:41:49 GMT",
"version": "v1"
}
] | 2014-09-03 | [
[
"de Haro",
"Jaume",
""
]
] | We study the introduction of holonomy corrections in $f(R)$ gravity. We will show that there are infinitely many ways, as many as canonical transformations, to introduce this kind of corrections, depending on the canonical variables (two coordinates and its conjugate momenta) used to obtain the Hamiltonian. In each cas... |
2305.19517 | Gabriel Menezes | Gabriel Menezes | Quantum gravity phenomenology from the perspective of quantum general
relativity and quadratic gravity | 18 pages, 1 figure, invited contribution to Classical and Quantum
Gravity Focus Issue: "Quantum Gravity Phenomenology in the Multi-Messenger
Era: Challenges and Perspectives"; v.2: Some text modifications, one figure
added, typos fixed and references added. This version has 19 pages, 2
figures. Published versio... | Class. Quantum Grav. 40 (2023) 235007 | 10.1088/1361-6382/acfb6d | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Multi-messenger astronomy provides us with the possibility of discovering
phenomenological signatures of quantum-gravity effects. This should be of
paramount importance in the pursuit of an elusive quantum theory for the
gravitational interactions. Here we discuss feasible explorations within the
effective field theo... | [
{
"created": "Wed, 31 May 2023 03:01:01 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Dec 2023 02:39:40 GMT",
"version": "v2"
}
] | 2023-12-25 | [
[
"Menezes",
"Gabriel",
""
]
] | Multi-messenger astronomy provides us with the possibility of discovering phenomenological signatures of quantum-gravity effects. This should be of paramount importance in the pursuit of an elusive quantum theory for the gravitational interactions. Here we discuss feasible explorations within the effective field theory... |
1901.00977 | Kiyoshi Shiraishi | Kiyoshi Shiraishi, Takuya Maki | Vacuum polarization near asymptotically anti-de Sitter black holes in
odd dimensions | 12 pages, 3 figures | Class.Quant.Grav. 11 (1994) 1687-1696 | 10.1088/0264-9381/11/7/009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, Ba\~nados, Teitelboim and Zanelli obtained spherically symmetric
black hole solutions in a particular class of Einstein--Lovelock gravity. We
derive the propagator in an exact form for a conformal scalar field in the
asymptotically anti-de Sitter black hole spacetime so as to study the quantum
effects of th... | [
{
"created": "Fri, 4 Jan 2019 03:58:56 GMT",
"version": "v1"
}
] | 2019-02-05 | [
[
"Shiraishi",
"Kiyoshi",
""
],
[
"Maki",
"Takuya",
""
]
] | Recently, Ba\~nados, Teitelboim and Zanelli obtained spherically symmetric black hole solutions in a particular class of Einstein--Lovelock gravity. We derive the propagator in an exact form for a conformal scalar field in the asymptotically anti-de Sitter black hole spacetime so as to study the quantum effects of the ... |
1211.0431 | Christoph Solveen | Christoph Solveen | Local Thermal Equilibrium and KMS states in Curved Spacetime | 13 pages; to appear in Class. Quant. Grav | Class. Quantum Grav. 29 (2012) 245015 | 10.1088/0264-9381/29/24/245015 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | On the example of a free massless and conformally coupled scalar field, it is
argued that in quantum field theory in curved spacetimes with time-like Killing
field, the corresponding KMS states (generalized Gibbs ensembles) at parameter
\beta>0 need not possess a definite temperature in the sense of the zeroth law.
I... | [
{
"created": "Fri, 2 Nov 2012 12:03:36 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Solveen",
"Christoph",
""
]
] | On the example of a free massless and conformally coupled scalar field, it is argued that in quantum field theory in curved spacetimes with time-like Killing field, the corresponding KMS states (generalized Gibbs ensembles) at parameter \beta>0 need not possess a definite temperature in the sense of the zeroth law. In ... |
2203.08723 | P. B. Covas | P. B. Covas, R. Prix | Improved short-segment detection statistic for continuous gravitational
waves | 11 pages | null | 10.1103/PhysRevD.105.124007 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Continuous gravitational waves represent one of the long-sought types of
signals that have yet to be detected. Due to their small amplitude, long
observational datasets (months-years) have to be analyzed together, thereby
vastly increasing the computational cost of these searches. All-sky searches
face the most sever... | [
{
"created": "Wed, 16 Mar 2022 16:16:16 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Apr 2022 15:32:28 GMT",
"version": "v2"
}
] | 2022-06-22 | [
[
"Covas",
"P. B.",
""
],
[
"Prix",
"R.",
""
]
] | Continuous gravitational waves represent one of the long-sought types of signals that have yet to be detected. Due to their small amplitude, long observational datasets (months-years) have to be analyzed together, thereby vastly increasing the computational cost of these searches. All-sky searches face the most severe ... |
1304.7331 | Daniele Malafarina | Pankaj S. Joshi, Daniele Malafarina, Ramesh Narayan | Distinguishing black holes from naked singularities through their
accretion disk properties | 18 pages, 5 figures, replaced with published version | Class. Quantum Grav. 31 015002 (2014) | 10.1088/0264-9381/31/1/015002 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that, in principle, a slowly evolving gravitationally collapsing
perfect fluid cloud can asymptotically settle to a static spherically symmetric
equilibrium configuration with a naked singularity at the center. We consider
one such asymptotic final configuration with a finite outer radius, and
construct a toy... | [
{
"created": "Sat, 27 Apr 2013 06:21:23 GMT",
"version": "v1"
},
{
"created": "Tue, 6 May 2014 03:52:48 GMT",
"version": "v2"
}
] | 2015-06-15 | [
[
"Joshi",
"Pankaj S.",
""
],
[
"Malafarina",
"Daniele",
""
],
[
"Narayan",
"Ramesh",
""
]
] | We show that, in principle, a slowly evolving gravitationally collapsing perfect fluid cloud can asymptotically settle to a static spherically symmetric equilibrium configuration with a naked singularity at the center. We consider one such asymptotic final configuration with a finite outer radius, and construct a toy m... |
2007.14312 | Bibhas Majhi Ranjan | Surojit Dalui, Bibhas Ranjan Majhi | Near horizon local instability and quantum thermality | Comments added, to appear in Phys. Rev. D | Phys. Rev. D 102, 124047 (2020) | 10.1103/PhysRevD.102.124047 | null | gr-qc hep-th nlin.CD physics.class-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit our previous proposed conjecture -- horizon creates a local
instability which acts as the source of quantum temperature of black hole. It
is found that a chargesless massless particle moving along the null trajectory
in Eddington-Finkelstein (EF) coordinates feels instability in the vicinity of
the horizon... | [
{
"created": "Tue, 28 Jul 2020 15:34:03 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Dec 2020 02:54:40 GMT",
"version": "v2"
}
] | 2020-12-29 | [
[
"Dalui",
"Surojit",
""
],
[
"Majhi",
"Bibhas Ranjan",
""
]
] | We revisit our previous proposed conjecture -- horizon creates a local instability which acts as the source of quantum temperature of black hole. It is found that a chargesless massless particle moving along the null trajectory in Eddington-Finkelstein (EF) coordinates feels instability in the vicinity of the horizon. ... |
1302.1354 | Bijan Saha Dr. | Bijan Saha | Nonlinear Spinor Fields in Bianchi type-I spacetime reexamined | 19 pages, 3 figures. arXiv admin note: substantial text overlap with
arXiv:1103.2890 | Int. J. Theor. Phys. 53 (2014) 1109 - 1129 | 10.1007/s10773-013-1906-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The specific behavior of spinor field in curve space-time with the exception
of FRW model almost always gives rise to non-trivial non-diagonal components of
the energy-momentum tensor. This non-triviality of non-diagonal components of
the energy-momentum tensor imposes some severe restrictions either on the
spinor fi... | [
{
"created": "Wed, 6 Feb 2013 13:16:33 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Dec 2013 11:25:05 GMT",
"version": "v2"
}
] | 2015-05-01 | [
[
"Saha",
"Bijan",
""
]
] | The specific behavior of spinor field in curve space-time with the exception of FRW model almost always gives rise to non-trivial non-diagonal components of the energy-momentum tensor. This non-triviality of non-diagonal components of the energy-momentum tensor imposes some severe restrictions either on the spinor fiel... |
1704.07840 | Jose' P. S. Lemos | Jos\'e P. S. Lemos, Vilson T. Zanchin | Plethora of relativistic charged spheres: The full spectrum of
Guilfoyle's static, electrically charged spherical solutions | 23 pages, 4 figures | Physical Review D 95, 104040 (2017) | 10.1103/PhysRevD.95.104040 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that Guilfoyle's exact solutions of the Einstein-Maxwell equations
for spherical symmetric static electrically charged matter with a
Reissner-Nordstr\"om exterior possess a bewildering plethora of different types
of solutions. For the parameter space of the solutions we use two normalized
variables, $q^2/R^2$... | [
{
"created": "Tue, 25 Apr 2017 18:00:40 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Sep 2020 18:28:54 GMT",
"version": "v2"
}
] | 2020-09-18 | [
[
"Lemos",
"José P. S.",
""
],
[
"Zanchin",
"Vilson T.",
""
]
] | We show that Guilfoyle's exact solutions of the Einstein-Maxwell equations for spherical symmetric static electrically charged matter with a Reissner-Nordstr\"om exterior possess a bewildering plethora of different types of solutions. For the parameter space of the solutions we use two normalized variables, $q^2/R^2$ a... |
2312.04855 | Seiya Sasaoka | Seiya Sasaoka, Naoki Koyama, Diego Dominguez, Yusuke Sakai, Kentaro
Somiya, Yuto Omae, Hirotaka Takahashi | Comparative study of 1D and 2D convolutional neural network models with
attribution analysis for gravitational wave detection from compact binary
coalescences | 12 pages, 9 figures | Phys. Rev. D 109, 043011 (2024) | 10.1103/PhysRevD.109.043011 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent advancements in gravitational wave astronomy have seen the application
of convolutional neural networks (CNNs) in signal detection from compact binary
coalescences. This study presents a comparative analysis of two CNN
architectures: one-dimensional (1D) and two-dimensional (2D) along with an
ensemble model co... | [
{
"created": "Fri, 8 Dec 2023 06:23:02 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Jan 2024 13:43:00 GMT",
"version": "v2"
}
] | 2024-02-08 | [
[
"Sasaoka",
"Seiya",
""
],
[
"Koyama",
"Naoki",
""
],
[
"Dominguez",
"Diego",
""
],
[
"Sakai",
"Yusuke",
""
],
[
"Somiya",
"Kentaro",
""
],
[
"Omae",
"Yuto",
""
],
[
"Takahashi",
"Hirotaka",
""
]
] | Recent advancements in gravitational wave astronomy have seen the application of convolutional neural networks (CNNs) in signal detection from compact binary coalescences. This study presents a comparative analysis of two CNN architectures: one-dimensional (1D) and two-dimensional (2D) along with an ensemble model comb... |
gr-qc/0405021 | Sanjay Jhingan | J. Ibanez and S. Jhingan | Renormalization Group approach to Inhomogeneous Cosmology | 9 pages, minor corrections | Phys.Rev. D70 (2004) 063507 | 10.1103/PhysRevD.70.063507 | null | gr-qc | null | Soliton solutions are recovered as scale-invariant asymptotic states of
vacuum inhomogeneous cosmologies using renormalization group method. The
stability analysis of these states is also given.
| [
{
"created": "Wed, 5 May 2004 15:26:17 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Sep 2004 07:45:06 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Ibanez",
"J.",
""
],
[
"Jhingan",
"S.",
""
]
] | Soliton solutions are recovered as scale-invariant asymptotic states of vacuum inhomogeneous cosmologies using renormalization group method. The stability analysis of these states is also given. |
1002.1210 | Yuri Shtanov | Kirill Krasnov and Yuri Shtanov | Cosmological perturbations in a family of deformations of general
relativity | 45 pages, version published in JCAP; minor changes, one section moved
to the appendix | JCAP 06 (2010) 006 | 10.1088/1475-7516/2010/06/006 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study linear cosmological perturbations in a previously introduced family
of deformations of general relativity characterized by the absence of new
degrees of freedom. The homogeneous and isotropic background in this class of
theories is unmodified and is described by the usual Friedmann equations. The
theory of c... | [
{
"created": "Fri, 5 Feb 2010 12:15:13 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Jun 2010 14:45:22 GMT",
"version": "v2"
}
] | 2010-06-08 | [
[
"Krasnov",
"Kirill",
""
],
[
"Shtanov",
"Yuri",
""
]
] | We study linear cosmological perturbations in a previously introduced family of deformations of general relativity characterized by the absence of new degrees of freedom. The homogeneous and isotropic background in this class of theories is unmodified and is described by the usual Friedmann equations. The theory of cos... |
2205.06585 | Grigory Volovik | G.E. Volovik | Double Hawking temperature: from black hole to de Sitter | 6 pages, no figures. arXiv admin note: text overlap with
arXiv:2108.00419 | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The double Hawking temperature $T=2T_H$ appears in some approaches to the
Hawking radiation, when the radiation is considered in terms of the quantum
tunneling. We consider the origin of such temperature for the black hole
horizon and also for the cosmological horizon in de Sitter spacetime. In case
the black hole ho... | [
{
"created": "Thu, 12 May 2022 15:15:16 GMT",
"version": "v1"
},
{
"created": "Tue, 17 May 2022 15:22:33 GMT",
"version": "v2"
},
{
"created": "Mon, 23 May 2022 09:56:33 GMT",
"version": "v3"
},
{
"created": "Sat, 18 Jun 2022 15:31:16 GMT",
"version": "v4"
},
{
"c... | 2022-11-01 | [
[
"Volovik",
"G. E.",
""
]
] | The double Hawking temperature $T=2T_H$ appears in some approaches to the Hawking radiation, when the radiation is considered in terms of the quantum tunneling. We consider the origin of such temperature for the black hole horizon and also for the cosmological horizon in de Sitter spacetime. In case the black hole hori... |
gr-qc/9710050 | Francis Vendrell | F. Vendrell and M.E. Ortiz | Covariant path integrals and black holes | 5 pages, Revtex, 1 figure. To appear in the proceedings of the Eighth
Marcel Grossmann Meeting on General Relativity. (Jerusalem, Israel, June
1997) | null | null | Imperial/TP/97-98/2 | gr-qc | null | The thermal nature of the propagator in a collapsed black-hole spacetime is
shown to follow from the non-trivial topology of the configuration space in
tortoise coordinates by using the path integral formalism.
| [
{
"created": "Wed, 8 Oct 1997 13:07:34 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Vendrell",
"F.",
""
],
[
"Ortiz",
"M. E.",
""
]
] | The thermal nature of the propagator in a collapsed black-hole spacetime is shown to follow from the non-trivial topology of the configuration space in tortoise coordinates by using the path integral formalism. |
2007.03400 | Yujie Tan | Xiao-Yu Lu, Yu-Jie Tan, and Cheng-Gang Shao | Sensitivity functions for space-borne gravitational wave detectors | null | null | 10.1103/PhysRevD.100.044042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Time-delay interferometry is put forward to improve the signal-to-noise ratio
of space-borne gravitational wave detectors by canceling the large laser phase
noise with different combinations of measured data. Based on the Michelson data
combination, the sensitivity function of the detector can be obtained by
averagin... | [
{
"created": "Tue, 7 Jul 2020 13:09:01 GMT",
"version": "v1"
}
] | 2020-07-08 | [
[
"Lu",
"Xiao-Yu",
""
],
[
"Tan",
"Yu-Jie",
""
],
[
"Shao",
"Cheng-Gang",
""
]
] | Time-delay interferometry is put forward to improve the signal-to-noise ratio of space-borne gravitational wave detectors by canceling the large laser phase noise with different combinations of measured data. Based on the Michelson data combination, the sensitivity function of the detector can be obtained by averaging ... |
gr-qc/0702148 | Bogus{\l}aw Broda | Bogus{\l}aw Broda, Piotr Bronowski, Marcin Ostrowski and Micha{\l}
Szanecki | Quantization of four-dimensional Abelian gravity | Minor changes, additional symmetry discussed. 5 pages, 2 columns,
REVTeX 4 | Phys.Lett.B655:178-182,2007 | 10.1016/j.physletb.2007.08.067 | null | gr-qc hep-th | null | An abelian version of standard general relativity in the Cartan-Palatini
gauge-like formulation in four dimensions has been introduced. Traditional
canonical analysis utilizing similarities to the akin Husain-Kuchar SU(2)
version of gravity has been performed. The model has been next quantized in the
canonical path-i... | [
{
"created": "Wed, 28 Feb 2007 15:30:12 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Aug 2007 09:54:00 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Broda",
"Bogusław",
""
],
[
"Bronowski",
"Piotr",
""
],
[
"Ostrowski",
"Marcin",
""
],
[
"Szanecki",
"Michał",
""
]
] | An abelian version of standard general relativity in the Cartan-Palatini gauge-like formulation in four dimensions has been introduced. Traditional canonical analysis utilizing similarities to the akin Husain-Kuchar SU(2) version of gravity has been performed. The model has been next quantized in the canonical path-int... |
gr-qc/0511082 | David Garfinkle | David Garfinkle | The need for dark matter in galaxies | null | Class.Quant.Grav. 23 (2006) 1391 | 10.1088/0264-9381/23/4/N01 | null | gr-qc astro-ph | null | Cooperstock and Tieu have proposed a model to account for galactic rotation
curves without invoking dark matter. I argue that no model of this type can
work.
| [
{
"created": "Tue, 15 Nov 2005 22:21:25 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Garfinkle",
"David",
""
]
] | Cooperstock and Tieu have proposed a model to account for galactic rotation curves without invoking dark matter. I argue that no model of this type can work. |
gr-qc/0104022 | Angelo Tartaglia | A. Tartaglia, M. L. Ruggiero | Testing gravitomagnetism on the Earth | LATEX, 8 pages, 1 eps figure | null | null | null | gr-qc | null | The paper contains a proposed experiment for testing the gravitomagnetic
effect on the propagation of light around a rotating mass. The idea is to use a
rotating spherical laboratory-scale shell, around which two mutually orthogonal
lightguides are wound acting as the arms of an interferometer. Numerical
estimates sh... | [
{
"created": "Sat, 7 Apr 2001 16:59:18 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Apr 2001 08:09:02 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Tartaglia",
"A.",
""
],
[
"Ruggiero",
"M. L.",
""
]
] | The paper contains a proposed experiment for testing the gravitomagnetic effect on the propagation of light around a rotating mass. The idea is to use a rotating spherical laboratory-scale shell, around which two mutually orthogonal lightguides are wound acting as the arms of an interferometer. Numerical estimates show... |
gr-qc/9808021 | Victor Berezin | A. Yu. Neronov (Moscow State University) | Quasiclassical mass spectrum of the black hole model with
selfgravitating dust shell | 35 pages, 8 figures, to appear in Phys. Rev. D | Phys.Rev. D59 (1999) 044023 | 10.1103/PhysRevD.59.044023 | INR - 0530/98 | gr-qc | null | We consider a quantum mechanical black hole model introduced in {\it
Phys.Rev.}, {\bf D57}, 1118 (1998) that consists of the selfgravitating dust
shell. The Schroedinger equation for this model is a finite difference equation
with the shift of the argument along the imaginary axis. Solving this equation
in quasiclass... | [
{
"created": "Fri, 7 Aug 1998 14:56:06 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Neronov",
"A. Yu.",
"",
"Moscow State University"
]
] | We consider a quantum mechanical black hole model introduced in {\it Phys.Rev.}, {\bf D57}, 1118 (1998) that consists of the selfgravitating dust shell. The Schroedinger equation for this model is a finite difference equation with the shift of the argument along the imaginary axis. Solving this equation in quasiclassic... |
1508.00312 | Yongwan Gim | Yongwan Gim and Wontae Kim | A Quantal Tolman Temperature | 5 pages, 1 figure, version to appear in EPJC | Eur. Phys. J. C75 (2015) 549 | 10.1140/epjc/s10052-015-3765-2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The conventional Tolman temperature based on the assumption of the traceless
condition of energy-momentum tensor for matter fields is infinite at the
horizon if Hawking radiation is involved. However, we note that the temperature
associated with Hawking radiation is of relevance to the trace anomaly, which
means that... | [
{
"created": "Mon, 3 Aug 2015 04:46:44 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Nov 2015 23:58:32 GMT",
"version": "v2"
}
] | 2015-12-01 | [
[
"Gim",
"Yongwan",
""
],
[
"Kim",
"Wontae",
""
]
] | The conventional Tolman temperature based on the assumption of the traceless condition of energy-momentum tensor for matter fields is infinite at the horizon if Hawking radiation is involved. However, we note that the temperature associated with Hawking radiation is of relevance to the trace anomaly, which means that t... |
1207.4594 | Matej Pavsic | Matej Pav\v{s}i\v{c} | Wheeler-DeWitt Equation in Five Dimensions and Modified QED | 14 pages | null | 10.1016/j.physletb.2012.09.034 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the ADM splitting of the Einstein-Hilbert action in five
dimensions in the presence of matter that can be either a "point particle", or
a set of scalar fields. The Hamiltonian, being a linear superposition of
constraints, is equal to zero. Upon quantization, we obtain the Schr\"odinger
equation for a wave... | [
{
"created": "Thu, 19 Jul 2012 09:40:45 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Pavšič",
"Matej",
""
]
] | We consider the ADM splitting of the Einstein-Hilbert action in five dimensions in the presence of matter that can be either a "point particle", or a set of scalar fields. The Hamiltonian, being a linear superposition of constraints, is equal to zero. Upon quantization, we obtain the Schr\"odinger equation for a wave f... |
2209.10469 | Takuya Katagiri | Takuya Katagiri, Masashi Kimura, Hiroyuki Nakano, Kazuyuki Omukai | Vanishing Love of Black Holes in General Relativity: From Spacetime
Conformal Symmetry of a Two-dimensional Reduced Geometry | 41 pages, v2: added discussion on the result of the Kerr black hole
in terms of the Teukolsky equation, v3: minor corrections, accepted for
publication in PRD | null | 10.1103/PhysRevD.107.124030 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the underlying structure of the vanishing of the Love numbers of
both Schwarzschild and Kerr black holes in terms of spacetime conformal
symmetry in a unified manner for the static spin-$s$ fields. The perturbations
can be reduced with the harmonic decomposition to a set of infinite static
scalar fields in a... | [
{
"created": "Wed, 21 Sep 2022 16:11:02 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Oct 2022 14:48:42 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Jun 2023 11:02:12 GMT",
"version": "v3"
}
] | 2023-06-28 | [
[
"Katagiri",
"Takuya",
""
],
[
"Kimura",
"Masashi",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Omukai",
"Kazuyuki",
""
]
] | We study the underlying structure of the vanishing of the Love numbers of both Schwarzschild and Kerr black holes in terms of spacetime conformal symmetry in a unified manner for the static spin-$s$ fields. The perturbations can be reduced with the harmonic decomposition to a set of infinite static scalar fields in a t... |
1806.09151 | Bijan Saha Dr. | Bijan Saha | Spinor fields in spherically symmetric space-time | 9 pages, 5 figures | The European Physical Journal Plus 133, 461 (2018) | 10.1140/epjp/i2018-12273-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the scope of a spherically symmetric space-time we study the role of a
nonlinear spinor field in the formation of different configurations with
spherical symmetries. The presence of the non-diagonal components of
energy-momentum tensor of the spinor field leads to some severe restrictions on
the spinor field i... | [
{
"created": "Sun, 24 Jun 2018 14:16:52 GMT",
"version": "v1"
}
] | 2018-12-31 | [
[
"Saha",
"Bijan",
""
]
] | Within the scope of a spherically symmetric space-time we study the role of a nonlinear spinor field in the formation of different configurations with spherical symmetries. The presence of the non-diagonal components of energy-momentum tensor of the spinor field leads to some severe restrictions on the spinor field its... |
2402.16484 | Shunichiro Kinoshita | Shunichiro Kinoshita | On geometrical origin of Kodama vector | 10 pages; v2: minor changes, appendix B and references added | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | It has been known that warped product spacetimes such as spherically
symmetric ones admit the Kodama vector. This vector provides a locally
conserved current made by contraction of the Einstein tensor, even though there
is no Killing vector. In addition, a quasilocal mass, Birkhoff's theorem and
various properties ar... | [
{
"created": "Mon, 26 Feb 2024 11:04:09 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Mar 2024 11:08:37 GMT",
"version": "v2"
}
] | 2024-03-13 | [
[
"Kinoshita",
"Shunichiro",
""
]
] | It has been known that warped product spacetimes such as spherically symmetric ones admit the Kodama vector. This vector provides a locally conserved current made by contraction of the Einstein tensor, even though there is no Killing vector. In addition, a quasilocal mass, Birkhoff's theorem and various properties are ... |
gr-qc/0406053 | Vilson T. Zanchin | Antares Kleber, Jos\'e P. S. Lemos, Vilson T. Zanchin | Thick shells and stars in Majumdar-Papapetrou general relativity | 16 pages, 3 figures; minor changes, added references | Grav.Cosmol. 11 (2005) 269-276 | null | null | gr-qc | null | The Majumdar-Papapetrou system is the subset of the Einstein-Maxwell-charged
dust matter theory, when the charge of each particle is equal to its mass.
Solutions for this system are less difficult to find, in general one does not
need even to impose any spatial symmetry a priori. For instance, any number of
extreme R... | [
{
"created": "Sun, 13 Jun 2004 21:39:22 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Dec 2005 20:56:22 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Kleber",
"Antares",
""
],
[
"Lemos",
"José P. S.",
""
],
[
"Zanchin",
"Vilson T.",
""
]
] | The Majumdar-Papapetrou system is the subset of the Einstein-Maxwell-charged dust matter theory, when the charge of each particle is equal to its mass. Solutions for this system are less difficult to find, in general one does not need even to impose any spatial symmetry a priori. For instance, any number of extreme Rei... |
0712.2144 | Martin Zofka | M. Zofka, J. Bicak | Cylindrical spacetimes with a cosmological constant and their sources | 15 pages, 2 figures | Class.Quant.Grav.25:015011,2008 | 10.1088/0264-9381/25/1/015011 | null | gr-qc | null | We review and investigate some basic properties of static, cylindrically
symmetric spacetimes with non-zero cosmological constant, find non-singular
sheet sources of these spacetimes and discuss their characteristics, and
clarify their relation to the 4D black-string solutions.
| [
{
"created": "Thu, 13 Dec 2007 12:54:51 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Zofka",
"M.",
""
],
[
"Bicak",
"J.",
""
]
] | We review and investigate some basic properties of static, cylindrically symmetric spacetimes with non-zero cosmological constant, find non-singular sheet sources of these spacetimes and discuss their characteristics, and clarify their relation to the 4D black-string solutions. |
gr-qc/0307056 | Naresh Dadhich | Aseem Paranjape and Naresh Dadhich | Embedding Diagrams for the Reissner-Nordstr\"om spacetime | RevTex4, 4 pages and 4 eps figures | Gen.Rel.Grav. 36 (2004) 1189-1195 | 10.1023/B:GERG.0000018285.39500.ed | null | gr-qc | null | We consider embedding diagrams for the Reissner-Nordstr\"om spacetime. We
embed the $(r-t)$ and $(r-\phi)$ planes into 3-Minkowski/Euclidean space and
discuss the relation between the diagrams and the corresponding curvature
scalar of the 2-metrics
| [
{
"created": "Fri, 11 Jul 2003 04:40:34 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Paranjape",
"Aseem",
""
],
[
"Dadhich",
"Naresh",
""
]
] | We consider embedding diagrams for the Reissner-Nordstr\"om spacetime. We embed the $(r-t)$ and $(r-\phi)$ planes into 3-Minkowski/Euclidean space and discuss the relation between the diagrams and the corresponding curvature scalar of the 2-metrics |
gr-qc/0205022 | L. Raul Abramo | L. Raul Abramo (USP, Brazil), L. Brenig and E. Gunzig (ULB, Belgium) | On the stability of gravity in the presence of a non-minimally coupled
scalar field | References and some clarifications added; 11 pages, 1 figure;
submitted to Physics Letters B | Phys.Lett. B549 (2002) 13-19 | 10.1016/S0370-2693(02)02898-8 | null | gr-qc astro-ph hep-th | null | We show that Einstein's gravity coupled to a non-minimally coupled scalar
field is stable even for high values of the scalar field, when the sign of the
Einstein-Hilbert action is reversed. We also discuss inflationary solutions and
a possible new mechanism of reheating.
| [
{
"created": "Mon, 6 May 2002 21:26:14 GMT",
"version": "v1"
},
{
"created": "Wed, 29 May 2002 17:23:17 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Abramo",
"L. Raul",
"",
"USP, Brazil"
],
[
"Brenig",
"L.",
"",
"ULB, Belgium"
],
[
"Gunzig",
"E.",
"",
"ULB, Belgium"
]
] | We show that Einstein's gravity coupled to a non-minimally coupled scalar field is stable even for high values of the scalar field, when the sign of the Einstein-Hilbert action is reversed. We also discuss inflationary solutions and a possible new mechanism of reheating. |
1706.01056 | Fethi M. Ramazanoglu | Fethi M. Ramazano\u{g}lu | Spontaneous growth of vector fields in gravity | 5 pages, 2 figures | Phys. Rev. D 96, 064009 (2017) | 10.1103/PhysRevD.96.064009 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the spontaneous scalarization scenario in scalar-tensor theories
is a specific case of a more general phenomenon. The key fact is that the
instability causing the spontaneous growth in scalars is due to the nonminimal
coupling in the theory, and not related to the nature of the scalar. Another
field with... | [
{
"created": "Sun, 4 Jun 2017 11:15:33 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Oct 2017 22:26:36 GMT",
"version": "v2"
}
] | 2017-10-10 | [
[
"Ramazanoğlu",
"Fethi M.",
""
]
] | We show that the spontaneous scalarization scenario in scalar-tensor theories is a specific case of a more general phenomenon. The key fact is that the instability causing the spontaneous growth in scalars is due to the nonminimal coupling in the theory, and not related to the nature of the scalar. Another field with t... |
2009.01066 | Juan Calderon Bustillo | Juan Calder\'on Bustillo, Nicolas Sanchis-Gual, Alejandro
Torres-Forn\'e, Jos\'e A. Font | Confusing Head-On Collisions with Precessing Intermediate-Mass Binary
Black Hole Mergers | 10 pages, 9 Figures. Version accepted in Phys. Rev. Lett. Includes
Supplementary Material | Phys. Rev. Lett. 126, 201101 (2021) | 10.1103/PhysRevLett.126.201101 | LIGO-P1900363 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report a degeneracy between the gravitational-wave signals from
quasi-circular precessing black-hole mergers and those from extremely eccentric
mergers, namely head-on collisions. Performing model selection on numerically
simulated signals of head-on collisions using models for quasi-circular
binaries we find that... | [
{
"created": "Wed, 2 Sep 2020 13:40:02 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Apr 2021 08:50:24 GMT",
"version": "v2"
},
{
"created": "Mon, 17 May 2021 23:14:07 GMT",
"version": "v3"
}
] | 2021-05-19 | [
[
"Bustillo",
"Juan Calderón",
""
],
[
"Sanchis-Gual",
"Nicolas",
""
],
[
"Torres-Forné",
"Alejandro",
""
],
[
"Font",
"José A.",
""
]
] | We report a degeneracy between the gravitational-wave signals from quasi-circular precessing black-hole mergers and those from extremely eccentric mergers, namely head-on collisions. Performing model selection on numerically simulated signals of head-on collisions using models for quasi-circular binaries we find that, ... |
2307.05459 | Sam C. Collingbourne | Sam C. Collingbourne | Coercivity Properties of the Canonical Energy in Double Null Gauge | 31 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the canonical energy associated with solutions to the
linearised vacuum Einstein equation on a stationary spacetime. The main result
of this paper establishes, in the context of the $4$-dimensional Schwarzschild
exterior, a direct correspondence between the conservation law satisfied by the
ca... | [
{
"created": "Tue, 11 Jul 2023 17:47:37 GMT",
"version": "v1"
}
] | 2023-07-12 | [
[
"Collingbourne",
"Sam C.",
""
]
] | In this paper, we study the canonical energy associated with solutions to the linearised vacuum Einstein equation on a stationary spacetime. The main result of this paper establishes, in the context of the $4$-dimensional Schwarzschild exterior, a direct correspondence between the conservation law satisfied by the cano... |
0811.2846 | Hideki Ishihara | Kouji Ogawa, Hideki Ishihara, Hiroshi Kozaki, and Hiroyuki Nakano | Perturbations of Spacetime around a Stationary Rotating Cosmic String | 30 pages, 6 figures; Minor corrections, references added, published
version in Physical Review D | Phys.Rev.D79:063501,2009 | 10.1103/PhysRevD.79.063501 | OCU-PHYS 307, AP-GR 64 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the metric perturbations around a stationary rotating Nambu-Goto
string in Minkowski spacetime. By solving the linearized Einstein equations, we
study the effects of azimuthal frame-dragging around the rotation axis and
linear frame-dragging along the rotation axis, the Newtonian logarithmic
potential, an... | [
{
"created": "Tue, 18 Nov 2008 07:13:47 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Feb 2009 03:14:50 GMT",
"version": "v2"
}
] | 2009-11-06 | [
[
"Ogawa",
"Kouji",
""
],
[
"Ishihara",
"Hideki",
""
],
[
"Kozaki",
"Hiroshi",
""
],
[
"Nakano",
"Hiroyuki",
""
]
] | We consider the metric perturbations around a stationary rotating Nambu-Goto string in Minkowski spacetime. By solving the linearized Einstein equations, we study the effects of azimuthal frame-dragging around the rotation axis and linear frame-dragging along the rotation axis, the Newtonian logarithmic potential, and ... |
2104.04834 | Reinaldo Gleiser | Reinaldo J. Gleiser | Linear perturbations of the Linet-Tian metrics with a positive
cosmological constant | 33 pages, 6 figures | null | 10.1088/1361-6382/ac2133 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Linet-Tian metrics are solutions of the Einstein equations with a
cosmological constant, $\Lambda$, that can be positive or negative. The linear
instability of these metrics in the case $\Lambda <0$, has already been
established. In the case $\Lambda>0$, it was found in a recent analysis that
the perturbation equ... | [
{
"created": "Sat, 10 Apr 2021 18:37:25 GMT",
"version": "v1"
}
] | 2021-10-27 | [
[
"Gleiser",
"Reinaldo J.",
""
]
] | The Linet-Tian metrics are solutions of the Einstein equations with a cosmological constant, $\Lambda$, that can be positive or negative. The linear instability of these metrics in the case $\Lambda <0$, has already been established. In the case $\Lambda>0$, it was found in a recent analysis that the perturbation equat... |
gr-qc/0201011 | Jiri Bicak | Jiri Bicak | Exact solutions and their interpretation | 18 pages. To be published in: Proceedings of the 16th International
Conference on General Relativity and Gravitation, Durban, 15 - 21 July, 2001,
eds. N.T. Bishop and S.D. Maharaj, World Scientific | null | 10.1142/9789812776556_0017 | null | gr-qc | null | This is the account of the workshop Exact solutions and their interpretation
at the 16-th International Conference on General Relativity and Gravitation
held in Durban, July 15-21, 2001. Work reported in 32 oral contributions
spanned a wide variety of topics, ranging from exact radiative spacetimes to
cosmological so... | [
{
"created": "Thu, 3 Jan 2002 22:19:10 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Bicak",
"Jiri",
""
]
] | This is the account of the workshop Exact solutions and their interpretation at the 16-th International Conference on General Relativity and Gravitation held in Durban, July 15-21, 2001. Work reported in 32 oral contributions spanned a wide variety of topics, ranging from exact radiative spacetimes to cosmological solu... |
1503.01636 | Jan Ambjorn | J. Ambjorn, A. Goerlich, J. Jurkiewicz and H. Zhang | The microscopic structure of 2D CDT coupled to matter | 14 pages,lot of figures | null | 10.1016/j.physletb.2015.05.026 | null | gr-qc hep-lat hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that for 1+1 dimensional Causal Dynamical Triangulations (CDT)
coupled to 4 massive scalar fields one can construct an effective transfer
matrix if the masses squared is larger than or equal to 0.05. The properties of
this transfer matrix can explain why CDT coupled to matter can behave
completely different f... | [
{
"created": "Thu, 5 Mar 2015 13:57:16 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Ambjorn",
"J.",
""
],
[
"Goerlich",
"A.",
""
],
[
"Jurkiewicz",
"J.",
""
],
[
"Zhang",
"H.",
""
]
] | We show that for 1+1 dimensional Causal Dynamical Triangulations (CDT) coupled to 4 massive scalar fields one can construct an effective transfer matrix if the masses squared is larger than or equal to 0.05. The properties of this transfer matrix can explain why CDT coupled to matter can behave completely different fro... |
gr-qc/0002068 | Roberto Scipioni | Roberto Scipioni | On the triviality of certain non-Riemannian models of gravitation | 12 pages, Latex, final version for Physics Letters A | Phys.Lett. A269 (2000) 263-268 | 10.1016/S0375-9601(00)00268-1 | null | gr-qc | null | We prove in the Tucker-Wang approach to non-Riemannian Gravity that a general
homogeneous Lagrangian density in the general connection with order of
homogeneity of at least two, gives no contribution to the generalised Einstein
equations. Using this result other important cases are also considered.
| [
{
"created": "Sat, 19 Feb 2000 00:14:26 GMT",
"version": "v1"
},
{
"created": "Sun, 2 Apr 2000 00:54:54 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Scipioni",
"Roberto",
""
]
] | We prove in the Tucker-Wang approach to non-Riemannian Gravity that a general homogeneous Lagrangian density in the general connection with order of homogeneity of at least two, gives no contribution to the generalised Einstein equations. Using this result other important cases are also considered. |
1108.5857 | Israel Quiros | Israel Quiros, Ricardo Garcia-Salcedo, Jose Edgar Madriz Aguilar,
Tonatiuh Matos | The conformal transformation's controversy: what are we missing? | 17 pages, no figures. version accepted by General Relativity and
Gravitation journal | General Relativity and Gravitation: Volume 45, Issue 2 (2013),
Page 489-518 | 10.1007/s10714-012-1484-7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An alternative interpretation of the conformal transformations of the metric
is discussed according to which the latter can be viewed as a mapping among
Riemannian and Weyl-integrable spaces. A novel aspect of the conformal
transformation's issue is then revealed: these transformations relate
complementary geometrica... | [
{
"created": "Tue, 30 Aug 2011 07:41:16 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Dec 2011 05:54:54 GMT",
"version": "v2"
},
{
"created": "Mon, 16 Apr 2012 06:00:18 GMT",
"version": "v3"
},
{
"created": "Mon, 5 Nov 2012 14:30:34 GMT",
"version": "v4"
}
] | 2013-01-29 | [
[
"Quiros",
"Israel",
""
],
[
"Garcia-Salcedo",
"Ricardo",
""
],
[
"Aguilar",
"Jose Edgar Madriz",
""
],
[
"Matos",
"Tonatiuh",
""
]
] | An alternative interpretation of the conformal transformations of the metric is discussed according to which the latter can be viewed as a mapping among Riemannian and Weyl-integrable spaces. A novel aspect of the conformal transformation's issue is then revealed: these transformations relate complementary geometrical ... |
0905.1103 | Ricardo Garcia-Salcedo | Ricardo Garcia-Salcedo, Tame Gonzalez, Claudia Moreno and Israel
Quiros | Dynamics of FRW Universes Sourced by Non-Linear Electrodynamics | 8 pages, 10 figures, pdf file, tex file | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the dynamical systems tools to study the (linear) dynamics of
Friedmann-Robertson-Walker universes that are fuelled by non-linear
electrodynamics. We focus, mainly, in two particular models. In the first model
the cosmic evolution is fuelled by cold dark matter, a cosmological constant
and a non-linear elect... | [
{
"created": "Thu, 7 May 2009 19:15:59 GMT",
"version": "v1"
}
] | 2009-05-08 | [
[
"Garcia-Salcedo",
"Ricardo",
""
],
[
"Gonzalez",
"Tame",
""
],
[
"Moreno",
"Claudia",
""
],
[
"Quiros",
"Israel",
""
]
] | We apply the dynamical systems tools to study the (linear) dynamics of Friedmann-Robertson-Walker universes that are fuelled by non-linear electrodynamics. We focus, mainly, in two particular models. In the first model the cosmic evolution is fuelled by cold dark matter, a cosmological constant and a non-linear electro... |
2405.04797 | Lakhan V. Jaybhaye | Lakhan V. Jaybhaye, Raja Solanki, P.K. Sahoo | Bouncing cosmological models in $f(R,L_m)$ gravity | Physica Scripta published version | Physics Scripta 99 (2024) 065031 | 10.1088/1402-4896/ad4838 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | This article explores matter bounce non-singular cosmology in $f(R,L_m)$
gravity. We consider two non-linear $f(R,L_m)$ functional forms, specifically,
$f(R,L_m) = \frac{R}{2} + \lambda R^2 + \alpha L_m$ and $f(R,L_m) = \frac{R}{2}
+ L_m ^\beta + \gamma$ representing a minimal coupling case. We derive the
correspondi... | [
{
"created": "Wed, 8 May 2024 04:10:53 GMT",
"version": "v1"
}
] | 2024-05-17 | [
[
"Jaybhaye",
"Lakhan V.",
""
],
[
"Solanki",
"Raja",
""
],
[
"Sahoo",
"P. K.",
""
]
] | This article explores matter bounce non-singular cosmology in $f(R,L_m)$ gravity. We consider two non-linear $f(R,L_m)$ functional forms, specifically, $f(R,L_m) = \frac{R}{2} + \lambda R^2 + \alpha L_m$ and $f(R,L_m) = \frac{R}{2} + L_m ^\beta + \gamma$ representing a minimal coupling case. We derive the corresponding... |
2206.02799 | Grigory Volovik | G.E. Volovik | Particle creation: Schwinger + Unruh + Hawking | 5 pages, no figures, accepted in JETP Letters | null | 10.1134/S0021364022601968 | null | gr-qc cond-mat.other hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the interconnection between the Schwinger pair creation in
electric field, Hawking radiation and particle creation in the Unruh effect.
All three processes can be described in terms of the entropy and temperature.
These thermodynamic like processes can be combined. We consider the combined
process of creat... | [
{
"created": "Mon, 6 Jun 2022 17:55:34 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Jun 2022 17:59:05 GMT",
"version": "v2"
},
{
"created": "Sat, 3 Sep 2022 07:17:27 GMT",
"version": "v3"
},
{
"created": "Tue, 20 Sep 2022 23:06:04 GMT",
"version": "v4"
}
] | 2022-11-09 | [
[
"Volovik",
"G. E.",
""
]
] | We discuss the interconnection between the Schwinger pair creation in electric field, Hawking radiation and particle creation in the Unruh effect. All three processes can be described in terms of the entropy and temperature. These thermodynamic like processes can be combined. We consider the combined process of creatio... |
2212.06837 | Pierre Heidmann | Pierre Heidmann, Ibrahima Bah and Emanuele Berti | Imaging Topological Solitons: the Microstructure Behind the Shadow | 15 pages and 6 figures, v2: typos corrected, v3: minor changes and
published version | null | 10.1103/PhysRevD.107.084042 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study photon geodesics in topological solitons that have the same
asymptotic properties as Schwarzschild black holes. These are coherent states
in string theory corresponding to pure deformations of spacetime through the
dynamics of compact extra dimensions. We compare these solutions with
Schwarzschild black hole... | [
{
"created": "Tue, 13 Dec 2022 19:00:00 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Dec 2022 07:51:27 GMT",
"version": "v2"
},
{
"created": "Thu, 1 Jun 2023 08:12:02 GMT",
"version": "v3"
}
] | 2023-06-02 | [
[
"Heidmann",
"Pierre",
""
],
[
"Bah",
"Ibrahima",
""
],
[
"Berti",
"Emanuele",
""
]
] | We study photon geodesics in topological solitons that have the same asymptotic properties as Schwarzschild black holes. These are coherent states in string theory corresponding to pure deformations of spacetime through the dynamics of compact extra dimensions. We compare these solutions with Schwarzschild black holes ... |
1812.02686 | Burkhard Kleihaus | Guillermo A. Gonzalez, Burkhard Kleihaus, Jutta Kunz and Sindy Mojica | Innermost stable circular orbits of neutron stars in
dilatonic-Einstein-Gauss-Bonnet theory | 14 pages, 11 figues | Phys. Rev. D 99, 024041 (2019) | 10.1103/PhysRevD.99.024041 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The innermost stable circular orbits (ISCOs) around rapidly rotating neutron
stars are studied in dilatonic Einstein-Gauss-Bonnet theory. Universal
relations for properly scaled ISCO properties are extended from General
Relativity to dilatonic Einstein-Gauss-Bonnet theory and additional relations
are obtained.
| [
{
"created": "Thu, 6 Dec 2018 17:54:53 GMT",
"version": "v1"
}
] | 2019-02-06 | [
[
"Gonzalez",
"Guillermo A.",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Mojica",
"Sindy",
""
]
] | The innermost stable circular orbits (ISCOs) around rapidly rotating neutron stars are studied in dilatonic Einstein-Gauss-Bonnet theory. Universal relations for properly scaled ISCO properties are extended from General Relativity to dilatonic Einstein-Gauss-Bonnet theory and additional relations are obtained. |
1507.01795 | Arun Kumar Pandey | Arun Kumar Pandey, Jitesh R. Bhatt | Primordial Generation of Magnetic Fields | 7 pages. To appear in the proceedings of XXI DAE-BRNS High Energy
Physics Symposium, IIT Guwahati, India, December 2014 | null | 10.1007/978-3-319-25619-1_62 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reexamine generation of the primordial magnetic fields, at temperature
$T>80$TeV, by applying a consistent kinetic theory framework which is suitably
modified to take the quantum anomaly into account. The modified kinetic
equation can reproduce the known quantum field theoretic results upto the
leading orders. We ... | [
{
"created": "Tue, 7 Jul 2015 13:24:23 GMT",
"version": "v1"
}
] | 2016-09-01 | [
[
"Pandey",
"Arun Kumar",
""
],
[
"Bhatt",
"Jitesh R.",
""
]
] | We reexamine generation of the primordial magnetic fields, at temperature $T>80$TeV, by applying a consistent kinetic theory framework which is suitably modified to take the quantum anomaly into account. The modified kinetic equation can reproduce the known quantum field theoretic results upto the leading orders. We sh... |
gr-qc/9805074 | C. Anastopoulos | C. Anastopoulos | Classicality via hydrodynamics in quantum field theory | 17 pages, LATEX | null | null | University of Barcelona Preprint | gr-qc hep-th | null | Motivated by the consistent histories approach to quantum mechanics, we
examine a simple model of hydrodynamic coarse-graining for a scalar field. It
consists in averaging the field over spatial regions of size L and constructing
the evolution equation for the coarse grained quantities, thus identifying
dissipation a... | [
{
"created": "Tue, 19 May 1998 16:11:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Anastopoulos",
"C.",
""
]
] | Motivated by the consistent histories approach to quantum mechanics, we examine a simple model of hydrodynamic coarse-graining for a scalar field. It consists in averaging the field over spatial regions of size L and constructing the evolution equation for the coarse grained quantities, thus identifying dissipation and... |
2310.14375 | Rakshak Adhikari | Rakshak Adhikari, Govind Menon, Mikhail V. Medvedev | Non-null and Force-Free Electromagnetic Configurations in Kerr Geometry | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Force-Free Electrodynamics (FFE) is known to describe the highly magnetized
plasma around pulsars and astrophysical black holes. The equations describing
FFE are highly non-linear and the task of finding a well-defined analytical
solution has been unyielding. However, FFE can also be understood in terms of
2-dimensio... | [
{
"created": "Sun, 22 Oct 2023 18:02:44 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Dec 2023 02:43:50 GMT",
"version": "v2"
}
] | 2023-12-14 | [
[
"Adhikari",
"Rakshak",
""
],
[
"Menon",
"Govind",
""
],
[
"Medvedev",
"Mikhail V.",
""
]
] | Force-Free Electrodynamics (FFE) is known to describe the highly magnetized plasma around pulsars and astrophysical black holes. The equations describing FFE are highly non-linear and the task of finding a well-defined analytical solution has been unyielding. However, FFE can also be understood in terms of 2-dimensiona... |
1701.06893 | Maaneli Derakhshani | Maaneli Derakhshani | Semiclassical Newtonian Field Theories Based On Stochastic Mechanics I | 40 pages (33 pages excluding references), no figures, LaTeX | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is the first in a two-part series in which we extend non-relativistic
stochastic mechanics, in the ZSM formulation [1, 2], to semiclassical Newtonian
gravity (ZSM-Newton) and semiclassical Newtonian electrodynamics (ZSM-Coulomb),
under the assumption that the gravitational and electromagnetic fields are
fundamen... | [
{
"created": "Tue, 17 Jan 2017 18:00:39 GMT",
"version": "v1"
}
] | 2017-01-25 | [
[
"Derakhshani",
"Maaneli",
""
]
] | This is the first in a two-part series in which we extend non-relativistic stochastic mechanics, in the ZSM formulation [1, 2], to semiclassical Newtonian gravity (ZSM-Newton) and semiclassical Newtonian electrodynamics (ZSM-Coulomb), under the assumption that the gravitational and electromagnetic fields are fundamenta... |
2011.01982 | Bekir Can L\"utf\"uo\u{g}lu | B. Hamil and B. C. L\"utf\"uo\u{g}lu | Effect of the modified Heisenberg algebra on the Black hole
thermodynamics | 11 pages, 7 figures | EPL 133 30003 (2021) | 10.1209/0295-5075/133/30003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter, we introduce two new forms of uncertainty relations by
extending the usual Heisenberg algebra with higher terms. Within these
scenarios, at first, we study on the Unruh temperature. We find that the Unruh
temperature increases in one of the new forms while it decreases in the other
form. Next, we expl... | [
{
"created": "Tue, 3 Nov 2020 19:57:31 GMT",
"version": "v1"
}
] | 2021-04-13 | [
[
"Hamil",
"B.",
""
],
[
"Lütfüoğlu",
"B. C.",
""
]
] | In this letter, we introduce two new forms of uncertainty relations by extending the usual Heisenberg algebra with higher terms. Within these scenarios, at first, we study on the Unruh temperature. We find that the Unruh temperature increases in one of the new forms while it decreases in the other form. Next, we explor... |
1204.4918 | Eduardo Martin-Martinez | Eduardo Martin-Martinez and Nicolas C. Menicucci | Cosmological quantum entanglement | 23 pages, 2 figures. v2 Added journal reference and minor changes to
match the published version | Class. Quantum Grav. 29 224003 (2012) | 10.1088/0264-9381/29/22/224003 | null | gr-qc astro-ph.CO quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review recent literature on the connection between quantum entanglement
and cosmology, with an emphasis on the context of expanding universes. We
discuss recent theoretical results reporting on the production of entanglement
in quantum fields due to the expansion of the underlying spacetime. We explore
how these r... | [
{
"created": "Sun, 22 Apr 2012 17:31:16 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Oct 2012 03:01:58 GMT",
"version": "v2"
}
] | 2015-03-20 | [
[
"Martin-Martinez",
"Eduardo",
""
],
[
"Menicucci",
"Nicolas C.",
""
]
] | We review recent literature on the connection between quantum entanglement and cosmology, with an emphasis on the context of expanding universes. We discuss recent theoretical results reporting on the production of entanglement in quantum fields due to the expansion of the underlying spacetime. We explore how these res... |
1302.6186 | Morgan Le Delliou | Jos\'e P. Mimoso, Morgan Le Delliou and Filipe C. Mena | Local conditions separating expansion from collapse in spherically
symmetric models with anisotropic pressures | 15pp, 2 figs. RevTeX 4.1, corrected typo in acknowledgements | null | 10.1103/PhysRevD.88.043501 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate spherically symmetric spacetimes with an anisotropic fluid and
discuss the existence and stability of a dividing shell separating expanding
and collapsing regions. We resort to a 3+1 splitting and obtain gauge invariant
conditions relating intrinsic spacetimes quantities to properties of the matter
sou... | [
{
"created": "Mon, 25 Feb 2013 18:41:31 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Mar 2013 19:00:55 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Mar 2013 16:01:19 GMT",
"version": "v3"
}
] | 2015-06-15 | [
[
"Mimoso",
"José P.",
""
],
[
"Delliou",
"Morgan Le",
""
],
[
"Mena",
"Filipe C.",
""
]
] | We investigate spherically symmetric spacetimes with an anisotropic fluid and discuss the existence and stability of a dividing shell separating expanding and collapsing regions. We resort to a 3+1 splitting and obtain gauge invariant conditions relating intrinsic spacetimes quantities to properties of the matter sourc... |
1804.02010 | Oldrich Semerak | P. Kotla\v{r}\'ik, O. Semer\'ak, P. \v{C}\'i\v{z}ek | Schwarzschild black hole encircled by a rotating thin disc: Properties
of perturbative solution | 14 pages, 7 figures | Physical Review D 97 (2018) 084006 | 10.1103/PhysRevD.97.084006 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In ApJ (1974), Will solved the perturbation of a Schwarzschild black hole due
to a slowly rotating light concentric thin ring, using Green's functions
expressed as infinite-sum expansions in multipoles and in the small mass and
rotational parameters. In a previous paper (ApJS 2017, Paper I), we expressed
the Green fu... | [
{
"created": "Thu, 5 Apr 2018 18:18:37 GMT",
"version": "v1"
}
] | 2018-04-09 | [
[
"Kotlařík",
"P.",
""
],
[
"Semerák",
"O.",
""
],
[
"Čížek",
"P.",
""
]
] | In ApJ (1974), Will solved the perturbation of a Schwarzschild black hole due to a slowly rotating light concentric thin ring, using Green's functions expressed as infinite-sum expansions in multipoles and in the small mass and rotational parameters. In a previous paper (ApJS 2017, Paper I), we expressed the Green func... |
2105.04145 | Umananda Dev Goswami | Jyatsnasree Bora and Umananda Dev Goswami | Radial oscillations and gravitational wave echoes of strange stars with
nonvanishing lambda | 15 pages, 10 figures | Astroparticle Physics 143 (2022) 102744 | 10.1016/j.astropartphys.2022.102744 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study the effect of the cosmological constant on radial oscillations and
gravitational wave echoes (GWEs) of non-rotating strange stars. To depict
strange star configurations we used two forms of equations of state (EoSs),
viz., the MIT Bag model EoS and the linear EoS. By taking a range of positive
and negative v... | [
{
"created": "Mon, 10 May 2021 06:57:32 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Jun 2022 12:33:30 GMT",
"version": "v2"
}
] | 2022-06-23 | [
[
"Bora",
"Jyatsnasree",
""
],
[
"Goswami",
"Umananda Dev",
""
]
] | We study the effect of the cosmological constant on radial oscillations and gravitational wave echoes (GWEs) of non-rotating strange stars. To depict strange star configurations we used two forms of equations of state (EoSs), viz., the MIT Bag model EoS and the linear EoS. By taking a range of positive and negative val... |
gr-qc/0310131 | Jos\'e Wadih Maluf | A. A. Sousa and J. W. Maluf | Gravitomagnetic effect and spin-torsion coupling | 20 pages, no figures, accepted for publication in Gen. Rel. Grav | Gen.Rel.Grav. 36 (2004) 967-982 | 10.1023/B:GERG.0000018084.58267.b9 | null | gr-qc | null | We study the gravitomagnetic effect in the context of absolute parallelism
with the use of a modified geodesic equation via a free parameter b. We
calculate the time difference in two atomic clocks orbiting the Earth in
opposite directions and find a small correction due to the coupling between the
torsion of the spa... | [
{
"created": "Thu, 30 Oct 2003 17:49:48 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Sousa",
"A. A.",
""
],
[
"Maluf",
"J. W.",
""
]
] | We study the gravitomagnetic effect in the context of absolute parallelism with the use of a modified geodesic equation via a free parameter b. We calculate the time difference in two atomic clocks orbiting the Earth in opposite directions and find a small correction due to the coupling between the torsion of the space... |
1310.7921 | Parthapratim Pradhan | Parthapratim Pradhan | Area Products and Mass Formula for Kerr-Newman-Taub-NUT Space-time | Accepted for publication in Modern Physics Letters A | Modern Physics Letters A, Vol. 30, No. 35 (2015) 1550170 | 10.1142/S0217732315501709 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive area product, entropy product, area sum and entropy sum of the
event horizon and Cauchy horizons for
Kerr-Newman-Taub-NUT(Newman-Unti-Tamburino) black hole in four dimensional
\emph{Lorentzian geometry}. We observe that these thermodynamic products are
\emph{not} universal(mass-independence) for this black ... | [
{
"created": "Tue, 29 Oct 2013 18:54:03 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Aug 2014 10:50:20 GMT",
"version": "v2"
},
{
"created": "Thu, 16 Jul 2015 05:43:04 GMT",
"version": "v3"
}
] | 2015-09-15 | [
[
"Pradhan",
"Parthapratim",
""
]
] | We derive area product, entropy product, area sum and entropy sum of the event horizon and Cauchy horizons for Kerr-Newman-Taub-NUT(Newman-Unti-Tamburino) black hole in four dimensional \emph{Lorentzian geometry}. We observe that these thermodynamic products are \emph{not} universal(mass-independence) for this black ho... |
gr-qc/0504131 | Aleksandar Mikovic | A. Mikovic | Tetrade Spin Foam Model | 13 pages | null | null | null | gr-qc | null | We propose a spin foam model of four-dimensional quantum gravity which is
based on the integration of the tetrads in the path integral for the Palatini
action of General Relativity. In the Euclidian gravity case we show that the
model can be understood as a modification of the Barrett-Crane spin foam model.
Fermionic... | [
{
"created": "Tue, 26 Apr 2005 14:12:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mikovic",
"A.",
""
]
] | We propose a spin foam model of four-dimensional quantum gravity which is based on the integration of the tetrads in the path integral for the Palatini action of General Relativity. In the Euclidian gravity case we show that the model can be understood as a modification of the Barrett-Crane spin foam model. Fermionic m... |
1312.7112 | Alexey Smirnov | Alexey L. Smirnov | Interacting thin shells in the interior of a Reissner-Nordstrom black
hole | 24 pages, 7 figures, minor typos corrected | Gen.Rel.Grav. 46 (2014) 3, 1676 | 10.1007/s10714-014-1676-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider some applications of the extended
Dray-t'Hooft-Redmount relation. In particular, using this relation, we study
geometries of interacting thin shells near the future Cauchy horizon of a
Reissner-Nordstrom black hole.
| [
{
"created": "Thu, 26 Dec 2013 14:23:58 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Nov 2014 09:18:27 GMT",
"version": "v2"
}
] | 2014-11-26 | [
[
"Smirnov",
"Alexey L.",
""
]
] | In this paper we consider some applications of the extended Dray-t'Hooft-Redmount relation. In particular, using this relation, we study geometries of interacting thin shells near the future Cauchy horizon of a Reissner-Nordstrom black hole. |
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