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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0203038 | Dinesh Singh | S Kessari, D Singh, R W Tucker, and C Wang | Scattering of Spinning Test Particles by Plane Gravitational and
Electromagnetic Waves | Submitted to Classical and Quantum Gravity. 12 pages | Class.Quant.Grav. 19 (2002) 4943-4952 | 10.1088/0264-9381/19/19/312 | null | gr-qc | null | The Mathisson-Papapetrou-Dixon (MPD) equations for the motion of electrically
neutral massive spinning particles are analysed, in the pole-dipole
approximation, in an Einstein-Maxwell plane-wave background spacetime. By
exploiting the high symmetry of such spacetimes these equations are reduced to
a system of tractab... | [
{
"created": "Tue, 12 Mar 2002 15:37:32 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Kessari",
"S",
""
],
[
"Singh",
"D",
""
],
[
"Tucker",
"R W",
""
],
[
"Wang",
"C",
""
]
] | The Mathisson-Papapetrou-Dixon (MPD) equations for the motion of electrically neutral massive spinning particles are analysed, in the pole-dipole approximation, in an Einstein-Maxwell plane-wave background spacetime. By exploiting the high symmetry of such spacetimes these equations are reduced to a system of tractable... |
0811.2560 | Xiaohua Zhou | Xiaohua Zhou | Some characteristics of three exact solutions of Einstein equations
minimally coupled to a Quintessence field | 6 pages, 3 figures. Submitted to Chinese Physics B | Chinese Phys. B 18 (2009) 3115-3121 | 10.1088/1674-1056/18/8/003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show some characteristics of three exact solutions to the Einstein's
gravity minimally coupled to a Quintessence field. Besides eternal inflation,
several other interesting inflationary processes, such as transitory inflation,
are attained in these solutions. Singularity is avoided in some special cases.
| [
{
"created": "Sun, 16 Nov 2008 14:51:48 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Nov 2008 07:48:16 GMT",
"version": "v2"
}
] | 2009-08-30 | [
[
"Zhou",
"Xiaohua",
""
]
] | We show some characteristics of three exact solutions to the Einstein's gravity minimally coupled to a Quintessence field. Besides eternal inflation, several other interesting inflationary processes, such as transitory inflation, are attained in these solutions. Singularity is avoided in some special cases. |
2307.11789 | Ragil Brand Ndongmo Tsafack | Ragil Brand Tsafack Ndongmo, Saleh Mahamat, Thomas Bouetou, Conrad
Bertrand Tabi and Timol\'eon Cr\'epin Kofan\'e | Corrected thermodynamics of nonlinear magnetic-charged black hole
surrounded by perfect fluid dark matter | 10 pages, 5 figures | International Journal of Theoretical Physics (2024) | 10.1007/s10773-024-05687-8 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we investigate the influence of perfect fluid dark matter and
quantum corrections on the thermodynamics of non-linear magnetic-charged black
hole. We consider the metric of the static non-linear magnetic-charged black
hole in the background of perfect fluid dark matter. Starting with the black
hole tem... | [
{
"created": "Thu, 20 Jul 2023 18:41:13 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Feb 2024 16:17:55 GMT",
"version": "v2"
},
{
"created": "Sat, 29 Jun 2024 09:44:48 GMT",
"version": "v3"
}
] | 2024-07-02 | [
[
"Ndongmo",
"Ragil Brand Tsafack",
""
],
[
"Mahamat",
"Saleh",
""
],
[
"Bouetou",
"Thomas",
""
],
[
"Tabi",
"Conrad Bertrand",
""
],
[
"Kofané",
"Timoléon Crépin",
""
]
] | In this paper, we investigate the influence of perfect fluid dark matter and quantum corrections on the thermodynamics of non-linear magnetic-charged black hole. We consider the metric of the static non-linear magnetic-charged black hole in the background of perfect fluid dark matter. Starting with the black hole tempe... |
2212.08948 | Carlos A. S. Almeida | A. R. P. Moreira, F. C. E. Lima, and C. A. S. Almeida | Geometrically contracted structure in teleparallel $f(T)$ gravity | 22 pages, 15 captioned figures. To appear in International Journal of
Modern Physics D | null | 10.1142/S021827182350013X | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In the teleparallel $f(T)$ gravity scenario, we consider a five-dimensional
thick brane. This scenario is interesting because this theory can provide
explanations for inflation, radiation, and dark matter under certain
conditions. It is convenient to assume, for our study, a polynomial profile of
the function $f(T)$.... | [
{
"created": "Sat, 17 Dec 2022 20:39:39 GMT",
"version": "v1"
}
] | 2023-04-19 | [
[
"Moreira",
"A. R. P.",
""
],
[
"Lima",
"F. C. E.",
""
],
[
"Almeida",
"C. A. S.",
""
]
] | In the teleparallel $f(T)$ gravity scenario, we consider a five-dimensional thick brane. This scenario is interesting because this theory can provide explanations for inflation, radiation, and dark matter under certain conditions. It is convenient to assume, for our study, a polynomial profile of the function $f(T)$. I... |
gr-qc/0501026 | Ernest Tagirov | E.A. Tagirov | A mystery of conformal coupling | 4 pages, title changed, minor grammar corrections | null | null | null | gr-qc hep-th | null | An origin and necessity of so called conformal (or,Penrose-Chernikov-Tagirov)
coupling of scalar field to the metric of n-dimensional Riemannian space-time
is discussed in brief. The corresponding general-relativistic field equation
implies a one-particle (quantum mechanical) Schrodinger Hamiltonian which
depends on ... | [
{
"created": "Sun, 9 Jan 2005 19:11:09 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Jan 2005 11:11:11 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Tagirov",
"E. A.",
""
]
] | An origin and necessity of so called conformal (or,Penrose-Chernikov-Tagirov) coupling of scalar field to the metric of n-dimensional Riemannian space-time is discussed in brief. The corresponding general-relativistic field equation implies a one-particle (quantum mechanical) Schrodinger Hamiltonian which depends on th... |
gr-qc/9309017 | Wai Suen | Ian Redmount and Wai-Mo Suen | Quantum Dynamics of Lorentzian Spacetime Foam | 37 pages, 93-7 | Phys.Rev. D49 (1994) 5199-5210 | 10.1103/PhysRevD.49.5199 | null | gr-qc | null | A simple spacetime wormhole, which evolves classically from zero throat
radius to a maximum value and recontracts, can be regarded as one possible mode
of fluctuation in the microscopic ``spacetime foam'' first suggested by
Wheeler. The dynamics of a particularly simple version of such a wormhole can
be reduced to th... | [
{
"created": "Tue, 14 Sep 1993 23:45:51 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Redmount",
"Ian",
""
],
[
"Suen",
"Wai-Mo",
""
]
] | A simple spacetime wormhole, which evolves classically from zero throat radius to a maximum value and recontracts, can be regarded as one possible mode of fluctuation in the microscopic ``spacetime foam'' first suggested by Wheeler. The dynamics of a particularly simple version of such a wormhole can be reduced to that... |
2407.07962 | Maxime Gadioux | Maxime Gadioux, Robie A. Hennigar, Harvey S. Reall | Evolution of creases on the event horizon of a black hole merger | 44 pages + appendices, many figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A generic black hole merger occurs through a restructuring of creases (sharp
edges) on the event horizon. This process is studied for a black hole merger in
the limit of infinite mass ratio, for which constructing the event horizon
reduces to finding a null hypersurface that asymptotes to a Rindler horizon in
the Ker... | [
{
"created": "Wed, 10 Jul 2024 18:01:49 GMT",
"version": "v1"
}
] | 2024-07-12 | [
[
"Gadioux",
"Maxime",
""
],
[
"Hennigar",
"Robie A.",
""
],
[
"Reall",
"Harvey S.",
""
]
] | A generic black hole merger occurs through a restructuring of creases (sharp edges) on the event horizon. This process is studied for a black hole merger in the limit of infinite mass ratio, for which constructing the event horizon reduces to finding a null hypersurface that asymptotes to a Rindler horizon in the Kerr ... |
2405.05625 | Subenoy Chakraborty | Dhritimalya Roy, Ayanendu Dutta, Bikram Ghosh, Subenoy Chakraborty | Does Dynamical Wormhole Evolve From Emergent Scenario? | null | New Astronomy, Volume 111, October 2024, 102248 | 10.1016/j.newast.2024.102248 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work we analyse a dynamical wormhole solution with two fluids
system (one isotropic and homogeneous and the other being inhomogeneous and
anisotropic in nature) as the matter at the throat. We choose two different
forms of Equation of State(EoS) and investigate two solutions of the wormhole
geometry. T... | [
{
"created": "Thu, 9 May 2024 08:51:29 GMT",
"version": "v1"
}
] | 2024-05-10 | [
[
"Roy",
"Dhritimalya",
""
],
[
"Dutta",
"Ayanendu",
""
],
[
"Ghosh",
"Bikram",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | In the present work we analyse a dynamical wormhole solution with two fluids system (one isotropic and homogeneous and the other being inhomogeneous and anisotropic in nature) as the matter at the throat. We choose two different forms of Equation of State(EoS) and investigate two solutions of the wormhole geometry. The... |
1706.09875 | Eric W. Hirschmann | Eric W. Hirschmann, Luis Lehner, Steven L. Liebling, Carlos Palenzuela | Black Hole Dynamics in Einstein-Maxwell-Dilaton Theory | 13 pages, 9 figures | Phys. Rev. D 97, 064032 (2018) | 10.1103/PhysRevD.97.064032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the properties and dynamics of black holes within a family of
alternative theories of gravity, namely Einstein-Maxwell-dilaton (EMD) theory.
We analyze the dynamical evolution of individual black holes as well as the
merger of binary black hole systems. We do this for a wide range of parameter
values for ... | [
{
"created": "Thu, 29 Jun 2017 17:39:53 GMT",
"version": "v1"
}
] | 2018-04-04 | [
[
"Hirschmann",
"Eric W.",
""
],
[
"Lehner",
"Luis",
""
],
[
"Liebling",
"Steven L.",
""
],
[
"Palenzuela",
"Carlos",
""
]
] | We consider the properties and dynamics of black holes within a family of alternative theories of gravity, namely Einstein-Maxwell-dilaton (EMD) theory. We analyze the dynamical evolution of individual black holes as well as the merger of binary black hole systems. We do this for a wide range of parameter values for th... |
1309.1758 | Xin Li | Xin Li, Sai Wang and Zhe Chang | Finslerian perturbation for the $\Lambda$CDM model | 17 pages | null | 10.1088/0253-6102/61/6/19 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | We present Finslerian perturbation for the $\Lambda$CDM model, which breaks
the isotropic symmetry of the universe. The analysis on the Killing vectors
shows that the Randers-Finsler spacetime breaks the isotropic symmetry even if
the scalar perturbations of the FRW metric vanish. In Randers-Finsler
spacetime, the mo... | [
{
"created": "Fri, 6 Sep 2013 10:03:13 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Li",
"Xin",
""
],
[
"Wang",
"Sai",
""
],
[
"Chang",
"Zhe",
""
]
] | We present Finslerian perturbation for the $\Lambda$CDM model, which breaks the isotropic symmetry of the universe. The analysis on the Killing vectors shows that the Randers-Finsler spacetime breaks the isotropic symmetry even if the scalar perturbations of the FRW metric vanish. In Randers-Finsler spacetime, the modi... |
2212.02416 | Narasimha Reddy Gosala | Narasimha Reddy Gosala, Arundhati Dasgupta | Interaction of Gravitational Waves with Yang-Mills fields | 24 pages,15 figures. Accepted for publication in General Relativity
and Gravitation | Gen Relativ Gravit 56, 36 (2024) | 10.1007/s10714-024-03221-z | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | In this paper, we discuss the interaction of non-Abelian SU(2) Yang-Mills
progressive waves with gravitational waves. We solve and obtain some
interesting solutions to pure Yang-Mills equations in different backgrounds,
and perturbative solutions induced due to gravitational waves. These
perturbations show `beat patt... | [
{
"created": "Mon, 5 Dec 2022 17:01:14 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Feb 2024 18:20:08 GMT",
"version": "v2"
}
] | 2024-03-20 | [
[
"Gosala",
"Narasimha Reddy",
""
],
[
"Dasgupta",
"Arundhati",
""
]
] | In this paper, we discuss the interaction of non-Abelian SU(2) Yang-Mills progressive waves with gravitational waves. We solve and obtain some interesting solutions to pure Yang-Mills equations in different backgrounds, and perturbative solutions induced due to gravitational waves. These perturbations show `beat patter... |
2204.03043 | Surjeet Rajendran | Anne-Katherine Burns, David E. Kaplan, Tom Melia and Surjeet Rajendran | Time Evolution in Quantum Cosmology | 11 pages, Added references, clarified discussion about coherent state
evolution and highlighted how certain classical gauge choices are not quantum
mechanically allowed | null | null | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quantum description of time evolution in non-linear gravitational systems
such as cosmological space-times is not well understood. We show, in the
simplified setting of mini-superspace, that time evolution of this system can
be obtained using a gauge fixed path integral, as long as one does not
integrate over pro... | [
{
"created": "Wed, 6 Apr 2022 18:54:11 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Apr 2023 19:34:27 GMT",
"version": "v2"
}
] | 2023-05-02 | [
[
"Burns",
"Anne-Katherine",
""
],
[
"Kaplan",
"David E.",
""
],
[
"Melia",
"Tom",
""
],
[
"Rajendran",
"Surjeet",
""
]
] | The quantum description of time evolution in non-linear gravitational systems such as cosmological space-times is not well understood. We show, in the simplified setting of mini-superspace, that time evolution of this system can be obtained using a gauge fixed path integral, as long as one does not integrate over prope... |
gr-qc/9304047 | null | Yu. A. Kubyshin, V. O. Malyshenko, and D. Marin Ricoy | Invariant Connections with Torsion on Group Manifolds and Their
Application in Kaluza-Klein Theories | 13 pages, LATEX, UB-ECM-PF 93/10 | J.Math.Phys. 35 (1994) 310-320 | 10.1063/1.530877 | null | gr-qc | null | Invariant connections with torsion on simple group manifolds $S$ are studied
and an explicit formula describing them is presented. This result is used for
the dimensional reduction in a theory of multidimensional gravity with
curvature squared terms on $M^{4} \times S$. We calculate the potential of
scalar fields, em... | [
{
"created": "Sun, 2 May 1993 12:55:30 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Kubyshin",
"Yu. A.",
""
],
[
"Malyshenko",
"V. O.",
""
],
[
"Ricoy",
"D. Marin",
""
]
] | Invariant connections with torsion on simple group manifolds $S$ are studied and an explicit formula describing them is presented. This result is used for the dimensional reduction in a theory of multidimensional gravity with curvature squared terms on $M^{4} \times S$. We calculate the potential of scalar fields, emer... |
gr-qc/9303008 | Don N. Page | Don N. Page | No Superluminal Expansion of the Universe | 9 pages, LaTeX, Alberta Thy-13-93 | null | null | null | gr-qc | null | The apparent superluminal growth in the size of a sufficiently large part of
the universe can be ascribed to the special relativistic effect of time
dilation.
| [
{
"created": "Tue, 2 Mar 1993 23:53:37 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Page",
"Don N.",
""
]
] | The apparent superluminal growth in the size of a sufficiently large part of the universe can be ascribed to the special relativistic effect of time dilation. |
1111.5488 | Riccardo Sturani | S. Foffa and R. Sturani | Tail terms in gravitational radiation reaction via effective field
theory | 17 pages, 3 figures. Result interpretation revised in v2, figures and
reference added | null | 10.1103/PhysRevD.87.044056 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational radiation reaction affects the dynamics of gravitationally
bound binary systems. Here we focus on the leading "tail" term which modifies
binary dynamics at fourth post-Newtonian order, as first computed by Blanchet
and Damour. We re-produce this result using effective field theory techniques
in the fram... | [
{
"created": "Wed, 23 Nov 2011 13:33:20 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Dec 2012 13:46:26 GMT",
"version": "v2"
}
] | 2013-03-14 | [
[
"Foffa",
"S.",
""
],
[
"Sturani",
"R.",
""
]
] | Gravitational radiation reaction affects the dynamics of gravitationally bound binary systems. Here we focus on the leading "tail" term which modifies binary dynamics at fourth post-Newtonian order, as first computed by Blanchet and Damour. We re-produce this result using effective field theory techniques in the framew... |
gr-qc/0205033 | Scott A. Hughes | Kostas Glampedakis, Scott A. Hughes, and Daniel Kennefick | Approximating the inspiral of test bodies into Kerr black holes | 15 pages, 5 figures, submitted to PRD | Phys.Rev. D66 (2002) 064005 | 10.1103/PhysRevD.66.064005 | null | gr-qc astro-ph | null | We present a new approximate method for constructing gravitational radiation
driven inspirals of test-bodies orbiting Kerr black holes. Such orbits can be
fully described by a semi-latus rectum $p$, an eccentricity $e$, and an
inclination angle $\iota$; or, by an energy $E$, an angular momentum component
$L_z$, and a... | [
{
"created": "Wed, 8 May 2002 18:01:57 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Glampedakis",
"Kostas",
""
],
[
"Hughes",
"Scott A.",
""
],
[
"Kennefick",
"Daniel",
""
]
] | We present a new approximate method for constructing gravitational radiation driven inspirals of test-bodies orbiting Kerr black holes. Such orbits can be fully described by a semi-latus rectum $p$, an eccentricity $e$, and an inclination angle $\iota$; or, by an energy $E$, an angular momentum component $L_z$, and a t... |
1712.03778 | Jan Kwapisz | Jan Kwapisz, Krzysztof A. Meissner | Conformal Standard Model and Inflation | null | null | 10.5506/APhysPolB.49.115 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article presents a possible inflation scenario as a consequence of
non-minimal gravitational couplings in the Conformal Standard Model. The model
consists, in comparison to the SM, of additional right-chiral neutrinos and
complex scalars coupled to the right-chiral neutrinos but not to the SM
particles. The infl... | [
{
"created": "Mon, 11 Dec 2017 14:03:55 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Feb 2018 11:11:37 GMT",
"version": "v2"
}
] | 2018-02-27 | [
[
"Kwapisz",
"Jan",
""
],
[
"Meissner",
"Krzysztof A.",
""
]
] | This article presents a possible inflation scenario as a consequence of non-minimal gravitational couplings in the Conformal Standard Model. The model consists, in comparison to the SM, of additional right-chiral neutrinos and complex scalars coupled to the right-chiral neutrinos but not to the SM particles. The inflat... |
1706.09455 | Leo Medeiros Gouvea | R. R. Cuzinatto, C. A. M. de Melo, L. G. Medeiros, B. M. Pimentel, P.
J. Pompeia | Bopp-Podolsky black holes and the no-hair theorem | 9 pages, updated to match published version | Eur. Phys. J. C (2018) 78:43 | 10.1140/epjc/s10052-018-5525-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bopp-Podolsky electrodynamics is generalized to curved space-times. The
equations of motion are written for the case of static spherically symmetric
black holes and their exterior solutions are analyzed using Bekenstein's
method. It is shown the solutions split-up into two parts, namely a
non-homogeneous (asymptotica... | [
{
"created": "Wed, 28 Jun 2017 19:47:13 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Jul 2017 22:23:55 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Feb 2018 19:27:38 GMT",
"version": "v3"
}
] | 2018-02-07 | [
[
"Cuzinatto",
"R. R.",
""
],
[
"de Melo",
"C. A. M.",
""
],
[
"Medeiros",
"L. G.",
""
],
[
"Pimentel",
"B. M.",
""
],
[
"Pompeia",
"P. J.",
""
]
] | Bopp-Podolsky electrodynamics is generalized to curved space-times. The equations of motion are written for the case of static spherically symmetric black holes and their exterior solutions are analyzed using Bekenstein's method. It is shown the solutions split-up into two parts, namely a non-homogeneous (asymptoticall... |
1409.7502 | Tomohiro Harada | Tomohiro Harada and Masashi Kimura | Black holes as particle accelerators: a brief review | 26 pages, 6 figures, accepted for publication in Classical and
Quantum Gravity as a Topical Review, minor correction | null | 10.1088/0264-9381/31/24/243001 | RUP-14-11 | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Rapidly rotating Kerr black holes can accelerate particles to arbitrarily
high energy if the angular momentum of the particle is fine-tuned to some
critical value. This phenomenon is robust as it is founded on the basic
properties of geodesic orbits around a near-extremal Kerr black hole. On the
other hand, the maxim... | [
{
"created": "Fri, 26 Sep 2014 09:00:46 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Nov 2014 12:53:20 GMT",
"version": "v2"
}
] | 2015-06-23 | [
[
"Harada",
"Tomohiro",
""
],
[
"Kimura",
"Masashi",
""
]
] | Rapidly rotating Kerr black holes can accelerate particles to arbitrarily high energy if the angular momentum of the particle is fine-tuned to some critical value. This phenomenon is robust as it is founded on the basic properties of geodesic orbits around a near-extremal Kerr black hole. On the other hand, the maximum... |
1809.09390 | Waleed El Hanafy | Amr El-Zant, Waleed El Hanafy and Sherif Elgammal | $H_0$ Tension and the Phantom Regime: A Case Study In Terms of an
Infrared $f(T)$ Gravity | Accepted for publication in ApJ (17 pages, 10 figures, one table) | The Astrophysical Journal, 871: 2(210pp), 2019 | 10.3847/1538-4357/aafa12 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose an $f(T)$ teleparallel gravity theory including a torsional
infrared (IR) correction. We show that the governing Friedmann's equations of a
spatially flat universe include a phantom-like effective dark energy term
sourced by the torsion IR correction. As has been suggested, this phantom phase
does indeed a... | [
{
"created": "Tue, 25 Sep 2018 10:01:56 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Dec 2018 09:36:32 GMT",
"version": "v2"
}
] | 2019-02-04 | [
[
"El-Zant",
"Amr",
""
],
[
"Hanafy",
"Waleed El",
""
],
[
"Elgammal",
"Sherif",
""
]
] | We propose an $f(T)$ teleparallel gravity theory including a torsional infrared (IR) correction. We show that the governing Friedmann's equations of a spatially flat universe include a phantom-like effective dark energy term sourced by the torsion IR correction. As has been suggested, this phantom phase does indeed act... |
2405.13126 | Norihiro Tanahashi | Eugeny Babichev, Keisuke Izumi, Karim Noui, Norihiro Tanahashi,
Masahide Yamaguchi | Generalisation of Conformal-Disformal Transformations of the Metric in
Scalar-Tensor Theories | 33 pages, 1 table | null | null | KUNS-3003 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study new classes of metric transformations in the context of
scalar-tensor theories, which involve both higher derivatives of the scalar
field and derivatives of the metric itself. In general, such transformations
are not invertible as they involve derivatives of the metric, which typically
leads to instability d... | [
{
"created": "Tue, 21 May 2024 18:01:31 GMT",
"version": "v1"
}
] | 2024-05-24 | [
[
"Babichev",
"Eugeny",
""
],
[
"Izumi",
"Keisuke",
""
],
[
"Noui",
"Karim",
""
],
[
"Tanahashi",
"Norihiro",
""
],
[
"Yamaguchi",
"Masahide",
""
]
] | We study new classes of metric transformations in the context of scalar-tensor theories, which involve both higher derivatives of the scalar field and derivatives of the metric itself. In general, such transformations are not invertible as they involve derivatives of the metric, which typically leads to instability due... |
2211.09192 | F. Saueressig | Alfio Bonanno and Frank Saueressig | Stability properties of Regular Black Holes | 34 pages, Invited chapter for the edited book "Regular Black Holes:
Towards a New Paradigm of the Gravitational Collapse" (Ed. C. Bambi, Springer
Singapore, expected in 2023) | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Black holes encountered in general relativity are characterized by spacetime
singularities hidden within an event horizon. These singularities provide a key
motivation to go beyond general relativity and look for regular black holes
where the spacetime curvature remains bounded everywhere. A prominent mechanism
achie... | [
{
"created": "Wed, 16 Nov 2022 20:18:55 GMT",
"version": "v1"
}
] | 2022-11-18 | [
[
"Bonanno",
"Alfio",
""
],
[
"Saueressig",
"Frank",
""
]
] | Black holes encountered in general relativity are characterized by spacetime singularities hidden within an event horizon. These singularities provide a key motivation to go beyond general relativity and look for regular black holes where the spacetime curvature remains bounded everywhere. A prominent mechanism achievi... |
1203.3189 | Samuel E. Gralla | Samuel E. Gralla | Second Order Gravitational Self-Force | null | Phys. Rev. D 85, 124011 (2012) | 10.1103/PhysRevD.85.124011 | UMD-94-11 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The second-order gravitational self-force on a small body is an important
problem for gravitational-wave astronomy of extreme mass-ratio inspirals. We
give a first-principles derivation of a prescription for computing the first
and second perturbed metric and motion of a small body moving through a vacuum
background ... | [
{
"created": "Wed, 14 Mar 2012 19:57:09 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jun 2012 11:24:44 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Gralla",
"Samuel E.",
""
]
] | The second-order gravitational self-force on a small body is an important problem for gravitational-wave astronomy of extreme mass-ratio inspirals. We give a first-principles derivation of a prescription for computing the first and second perturbed metric and motion of a small body moving through a vacuum background sp... |
gr-qc/9804050 | Gerard Clement | G. Cl\'ement and A. Fabbri | The gravitating $\sigma$ model in 2+1 dimensions: black hole solutions | 28 pages, hrvmac, 10 epsf figures | Class.Quant.Grav. 16 (1999) 323-341 | 10.1088/0264-9381/16/2/001 | GCR-98/04/01 | gr-qc hep-th | null | We derive and discuss black-hole solutions to the gravitating O(3) $\sigma$
model in (2+1) dimensions. Three different kinds of static black holes are
found. One of these resembles the static BTZ black hole, another is completely
free of singularities, and the last type has the same Penrose diagram as the
(3+1)-dimen... | [
{
"created": "Tue, 21 Apr 1998 16:42:32 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Clément",
"G.",
""
],
[
"Fabbri",
"A.",
""
]
] | We derive and discuss black-hole solutions to the gravitating O(3) $\sigma$ model in (2+1) dimensions. Three different kinds of static black holes are found. One of these resembles the static BTZ black hole, another is completely free of singularities, and the last type has the same Penrose diagram as the (3+1)-dimensi... |
2203.13852 | Diego Cruces | Diego Cruces | Review on stochastic approach to inflation | Minor changes, references added | Universe 2022, 8(6), 334 | 10.3390/universe8060334 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a review on the state-of-the-art of the mathematical framework
known as stochastic inflation, paying special attention to its derivation and
giving references for the readers interested on results coming from the
application of the stochastic framework to different inflationary scenarios,
especially to tho... | [
{
"created": "Fri, 25 Mar 2022 18:36:58 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Jun 2022 14:23:09 GMT",
"version": "v2"
}
] | 2022-06-20 | [
[
"Cruces",
"Diego",
""
]
] | We present a review on the state-of-the-art of the mathematical framework known as stochastic inflation, paying special attention to its derivation and giving references for the readers interested on results coming from the application of the stochastic framework to different inflationary scenarios, especially to those... |
gr-qc/0701176 | Nikodem Poplawski | Nikodem J. Poplawski | Gravitation, electromagnetism and cosmological constant in purely affine
gravity | 17 pages, extended and combined with gr-qc/0612193; published version | Found.Phys.39:307-330,2009 | 10.1007/s10701-009-9284-y | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Ferraris-Kijowski purely affine Lagrangian for the electromagnetic field,
that has the form of the Maxwell Lagrangian with the metric tensor replaced by
the symmetrized Ricci tensor, is dynamically equivalent to the metric
Einstein-Maxwell Lagrangian, except the zero-field limit, for which the metric
tensor is no... | [
{
"created": "Wed, 31 Jan 2007 20:10:06 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Feb 2007 20:10:30 GMT",
"version": "v2"
},
{
"created": "Fri, 13 Mar 2009 15:42:54 GMT",
"version": "v3"
}
] | 2009-03-19 | [
[
"Poplawski",
"Nikodem J.",
""
]
] | The Ferraris-Kijowski purely affine Lagrangian for the electromagnetic field, that has the form of the Maxwell Lagrangian with the metric tensor replaced by the symmetrized Ricci tensor, is dynamically equivalent to the metric Einstein-Maxwell Lagrangian, except the zero-field limit, for which the metric tensor is not ... |
0704.1137 | Martin Bojowald | Martin Bojowald, Daniel Cartin and Gaurav Khanna | Lattice refining loop quantum cosmology, anisotropic models and
stability | 24 pages | Phys.Rev.D76:064018,2007 | 10.1103/PhysRevD.76.064018 | IGPG-07/4-2 | gr-qc | null | A general class of loop quantizations for anisotropic models is introduced
and discussed, which enhances loop quantum cosmology by relevant features seen
in inhomogeneous situations. The main new effect is an underlying lattice which
is being refined during dynamical changes of the volume. In general, this leads
to a... | [
{
"created": "Mon, 9 Apr 2007 17:51:24 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Bojowald",
"Martin",
""
],
[
"Cartin",
"Daniel",
""
],
[
"Khanna",
"Gaurav",
""
]
] | A general class of loop quantizations for anisotropic models is introduced and discussed, which enhances loop quantum cosmology by relevant features seen in inhomogeneous situations. The main new effect is an underlying lattice which is being refined during dynamical changes of the volume. In general, this leads to a n... |
1402.5594 | Norbert Wex Dr. | Norbert Wex | Testing Relativistic Gravity with Radio Pulsars | 80 pages, 22 figures, to appear in the Brumberg Festschrift, edited
by S. M. Kopeikein, and to be published by de Gruyter, Berlin, 2014.
Submitted to arXiv after final formatting for de Gruyter | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Before the 1970s, precision tests for gravity theories were constrained to
the weak gravitational fields of the Solar system. Hence, only the weak-field
slow-motion aspects of relativistic celestial mechanics could be investigated.
Testing gravity beyond the first post-Newtonian contributions was for a long
time out ... | [
{
"created": "Sun, 23 Feb 2014 10:17:17 GMT",
"version": "v1"
}
] | 2014-04-16 | [
[
"Wex",
"Norbert",
""
]
] | Before the 1970s, precision tests for gravity theories were constrained to the weak gravitational fields of the Solar system. Hence, only the weak-field slow-motion aspects of relativistic celestial mechanics could be investigated. Testing gravity beyond the first post-Newtonian contributions was for a long time out of... |
1012.5860 | Sarp Akcay | Sarp Akcay | A Fast Frequency-Domain Algorithm for Gravitational Self-Force: I,
Circular Orbits in Schwarzschild Spacetime | 26 pages, 4 figures, with minor typos now fixed | Phys.Rev.D83:124026,2011 | 10.1103/PhysRevD.83.124026 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Fast, reliable orbital evolutions of compact objects around massive black
holes will be needed as input for gravitational wave search algorithms in the
data stream generated by the planned Laser Interferometer Space Antenna (LISA).
Currently, the state of the art is a time-domain code by [Phys. Rev. D{\bf 81},
084021... | [
{
"created": "Wed, 29 Dec 2010 02:25:54 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Mar 2012 17:13:47 GMT",
"version": "v2"
}
] | 2012-03-06 | [
[
"Akcay",
"Sarp",
""
]
] | Fast, reliable orbital evolutions of compact objects around massive black holes will be needed as input for gravitational wave search algorithms in the data stream generated by the planned Laser Interferometer Space Antenna (LISA). Currently, the state of the art is a time-domain code by [Phys. Rev. D{\bf 81}, 084021, ... |
gr-qc/9706031 | Sergei Chervon | S.V.Chervon, V.M.Zhuravlev, V.K.Shchigolev | New exact solutions in standard inflationary models | 12 pages, Latex, to appear in: Phys.Lett.B | Phys.Lett. B398 (1997) 269-273 | 10.1016/S0370-2693(97)00238-4 | RGS-USU-97/02 | gr-qc | null | The exact solutions in the standard inflationary model based on the
self-interacting scalar field minimally coupled to gravity are considered. The
shape's freedom of the self-interacting potential $V(\phi)$ is postulated to
obtain a new set of the exact solutions in the framework of
Friedmann-Robertson-Walker Univers... | [
{
"created": "Wed, 11 Jun 1997 21:30:02 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Chervon",
"S. V.",
""
],
[
"Zhuravlev",
"V. M.",
""
],
[
"Shchigolev",
"V. K.",
""
]
] | The exact solutions in the standard inflationary model based on the self-interacting scalar field minimally coupled to gravity are considered. The shape's freedom of the self-interacting potential $V(\phi)$ is postulated to obtain a new set of the exact solutions in the framework of Friedmann-Robertson-Walker Universes... |
2404.08379 | Aurelien Barrau | Aur\'elien Barrau, Juan Garc\'ia-Bellido, Killian Martineau, Martin
Teuscher | Prospects for detection of ultra high frequency gravitational waves from
hyperbolic encounters with resonant cavities | null | null | null | null | gr-qc astro-ph.CO astro-ph.GA hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this brief note, we pursue the systematic investigation of possible
gravitational wave sources in the gigahertz band. We focus on hyperbolic
encounters of light black holes and evaluate precisely the expected signal when
accounting for the detailed characteristics of haloscope experiments.
Considering the GraHal s... | [
{
"created": "Fri, 12 Apr 2024 10:26:50 GMT",
"version": "v1"
}
] | 2024-04-15 | [
[
"Barrau",
"Aurélien",
""
],
[
"García-Bellido",
"Juan",
""
],
[
"Martineau",
"Killian",
""
],
[
"Teuscher",
"Martin",
""
]
] | In this brief note, we pursue the systematic investigation of possible gravitational wave sources in the gigahertz band. We focus on hyperbolic encounters of light black holes and evaluate precisely the expected signal when accounting for the detailed characteristics of haloscope experiments. Considering the GraHal set... |
1804.03649 | Orlando Luongo | Salvatore Capozziello, Orlando Luongo, Richard Pincak, Arvin Ravanpak | Cosmic acceleration in non-flat $f(T)$ cosmology | Accepted for publication in GRG | null | 10.1007/s10714-018-2374-4 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study $f(T)$ cosmological models inserting a non-vanishing spatial
curvature and discuss its consequences on cosmological dynamics. To figure this
out, a polynomial $f(T)$ model and a double torsion model are considered. We
first analyze those models with cosmic data, employing the recent surveys of
Union 2.1, bar... | [
{
"created": "Tue, 10 Apr 2018 17:51:31 GMT",
"version": "v1"
}
] | 2018-05-02 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Luongo",
"Orlando",
""
],
[
"Pincak",
"Richard",
""
],
[
"Ravanpak",
"Arvin",
""
]
] | We study $f(T)$ cosmological models inserting a non-vanishing spatial curvature and discuss its consequences on cosmological dynamics. To figure this out, a polynomial $f(T)$ model and a double torsion model are considered. We first analyze those models with cosmic data, employing the recent surveys of Union 2.1, baryo... |
2212.13194 | S. Danial Forghani | S. Danial Forghani | Harmonic Thin-Shell Wormhole Supported by Metric-Dependent Equation of
State | 2 figures (10 subfigures in total) | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | Abstract This short paper investigates the harmonic behavior of a
general-relativistic thin-shell wormhole supported by a particular type of
exotic fluid. The exotic fluid obeys a never-studied-before metric-dependent
equation of state. This equation of state is tailored such that the wormhole's
throat undergoes a ha... | [
{
"created": "Mon, 26 Dec 2022 15:47:21 GMT",
"version": "v1"
}
] | 2022-12-27 | [
[
"Forghani",
"S. Danial",
""
]
] | Abstract This short paper investigates the harmonic behavior of a general-relativistic thin-shell wormhole supported by a particular type of exotic fluid. The exotic fluid obeys a never-studied-before metric-dependent equation of state. This equation of state is tailored such that the wormhole's throat undergoes a harm... |
gr-qc/0404086 | Alejandro Rivero | Alejandro Rivero | Some minor examples on discrete geometry | 4 pages, added a remark on classical orbits and space time
dimensionality | null | null | null | gr-qc quant-ph | null | Assuming a minimum value for area measurement, the emergence of quantum
mechanics can be easily motivated from naive consideration of gravitational
force. Here we provide some pedagogical examples and extensions.
At the same time, the role of Planck mass is shown to be of some theoretical
influence even at low ener... | [
{
"created": "Tue, 20 Apr 2004 17:11:06 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Mar 2005 13:55:20 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Rivero",
"Alejandro",
""
]
] | Assuming a minimum value for area measurement, the emergence of quantum mechanics can be easily motivated from naive consideration of gravitational force. Here we provide some pedagogical examples and extensions. At the same time, the role of Planck mass is shown to be of some theoretical influence even at low energies... |
2201.11408 | Andras Laszlo | Andras Laszlo | On generally covariant mathematical formulation of Feynman integral in
Lorentz signature | 28 pages + appendix and supplementary material about topological
vector spaces; final published version | Classical and Quantum Gravity 39 (2022) 185004 | 10.1088/1361-6382/ac8636 | null | gr-qc hep-lat hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | It is widely accepted that the Feynman integral is one of the most promising
methodologies for defining a generally covariant formulation of nonperturbative
interacting quantum field theories (QFTs) without a fixed prearranged causal
background. Recent literature suggests that if the spacetime metric is not
fixed, e.... | [
{
"created": "Thu, 27 Jan 2022 09:54:12 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Feb 2022 17:24:38 GMT",
"version": "v2"
},
{
"created": "Thu, 1 Sep 2022 15:11:51 GMT",
"version": "v3"
}
] | 2022-09-05 | [
[
"Laszlo",
"Andras",
""
]
] | It is widely accepted that the Feynman integral is one of the most promising methodologies for defining a generally covariant formulation of nonperturbative interacting quantum field theories (QFTs) without a fixed prearranged causal background. Recent literature suggests that if the spacetime metric is not fixed, e.g.... |
1409.7953 | Alberto Diez-Tejedor | Jose M. Torres, Miguel Alcubierre, Alberto Diez-Tejedor and Dario
Nunez | Cosmological nonlinear structure formation in full general relativity | 16 pages, 14 figures. Matches version in print. To appear in Phys.
Rev. D | Phys. Rev. D 90, 123002 (2014) | 10.1103/PhysRevD.90.123002 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform numerical evolutions of cosmological scenarios using a standard
general relativistic code in spherical symmetry. We concentrate on two
different situations: initial matter distributions that are homogeneous and
isotropic, and perturbations to those that respect the spherical symmetry. As
matter models we c... | [
{
"created": "Sun, 28 Sep 2014 20:00:06 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Nov 2014 04:05:08 GMT",
"version": "v2"
}
] | 2014-12-09 | [
[
"Torres",
"Jose M.",
""
],
[
"Alcubierre",
"Miguel",
""
],
[
"Diez-Tejedor",
"Alberto",
""
],
[
"Nunez",
"Dario",
""
]
] | We perform numerical evolutions of cosmological scenarios using a standard general relativistic code in spherical symmetry. We concentrate on two different situations: initial matter distributions that are homogeneous and isotropic, and perturbations to those that respect the spherical symmetry. As matter models we con... |
2106.14602 | Shao-Wen Wei | Hui-Min Wang, Shao-Wen Wei | Shadow cast by Kerr-like black hole in the presence of plasma in
Einstein-bumblebee gravity | 16 pages and 10 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In the Einstein-bumblebee gravity, the Lorentz symmetry is spontaneously
broken by a vector field. In this paper, we attempt to test the Lorentz
symmetry via the observation of the shadow cast by the Kerr-like black hole
with or without plasma. A novel phenomenon of the Lorentz-violating parameter
on the shadow is ob... | [
{
"created": "Mon, 28 Jun 2021 12:14:27 GMT",
"version": "v1"
}
] | 2021-06-29 | [
[
"Wang",
"Hui-Min",
""
],
[
"Wei",
"Shao-Wen",
""
]
] | In the Einstein-bumblebee gravity, the Lorentz symmetry is spontaneously broken by a vector field. In this paper, we attempt to test the Lorentz symmetry via the observation of the shadow cast by the Kerr-like black hole with or without plasma. A novel phenomenon of the Lorentz-violating parameter on the shadow is obse... |
1303.3407 | Hristu Culetu | Hristu Culetu | Anisotropic fluid in a time dependent conformally flat spacetime | 6 pages, no figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The special conformal transformation (composed by inversion - translation -
inversion) is used to generate a time dependent conformally flat spacetime. In
order to be an exact solution of Einstein's equations, we need as a source a
stress tensor corresponding to an anisotropic fluid with negative regular
energy densi... | [
{
"created": "Thu, 14 Mar 2013 11:05:49 GMT",
"version": "v1"
}
] | 2013-03-15 | [
[
"Culetu",
"Hristu",
""
]
] | The special conformal transformation (composed by inversion - translation - inversion) is used to generate a time dependent conformally flat spacetime. In order to be an exact solution of Einstein's equations, we need as a source a stress tensor corresponding to an anisotropic fluid with negative regular energy density... |
2112.02653 | Andrei Derevianko | Andrei Derevianko, Derek Jackson Kimball, Conner Dailey | Reply to the comment on ''Quantum sensor networks as exotic field
telescopes for multi-messenger astronomy'' | null | null | null | null | gr-qc physics.atom-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The comment by Stadnik [arXiv:2111.14351v1] claims that "back-action", i.e.
interaction of exotic low-mass fields (ELF) with ordinary matter, "prevents the
multi-messenger astronomy on human timescales." We strongly disagree with this
blanket claim. This is {\em not a general conclusion}, as Stadnik's statement
entir... | [
{
"created": "Sun, 5 Dec 2021 18:54:13 GMT",
"version": "v1"
}
] | 2021-12-07 | [
[
"Derevianko",
"Andrei",
""
],
[
"Kimball",
"Derek Jackson",
""
],
[
"Dailey",
"Conner",
""
]
] | The comment by Stadnik [arXiv:2111.14351v1] claims that "back-action", i.e. interaction of exotic low-mass fields (ELF) with ordinary matter, "prevents the multi-messenger astronomy on human timescales." We strongly disagree with this blanket claim. This is {\em not a general conclusion}, as Stadnik's statement entirel... |
2407.08117 | Mustafa Saeed | Mustafa Saeed and Viqar Husain | Quantum cosmology as a lattice in a box | 6 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We describe quantization schemes for scalar field cosmology in the metric
variables with fundamental discreteness imposed with a lattice. The variables
chosen for quantization determine the lattice, and each lattice produces
distinct effective equations derived from semiclassical states. We show that
requiring a boun... | [
{
"created": "Thu, 11 Jul 2024 01:22:21 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Jul 2024 07:28:40 GMT",
"version": "v2"
}
] | 2024-07-30 | [
[
"Saeed",
"Mustafa",
""
],
[
"Husain",
"Viqar",
""
]
] | We describe quantization schemes for scalar field cosmology in the metric variables with fundamental discreteness imposed with a lattice. The variables chosen for quantization determine the lattice, and each lattice produces distinct effective equations derived from semiclassical states. We show that requiring a bounce... |
1008.1451 | Dinesh Singh | Dinesh Singh, Nader Mobed | A New Perspective on Path Integral Quantum Mechanics in Curved
Space-Time | 14 pages, 1 figure; major additions and revisions introduced; main
conclusions are unchanged; new affiliation added | null | 10.1142/S0217732312500654 | null | gr-qc hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A fundamentally different approach to path integral quantum mechanics in
curved space-time is presented, as compared to the standard approaches
currently available in the literature. Within the context of scalar particle
propagation in a locally curved background, such as described by Fermi or
Riemann normal co-ordin... | [
{
"created": "Mon, 9 Aug 2010 04:39:42 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Nov 2010 21:29:31 GMT",
"version": "v2"
},
{
"created": "Tue, 7 Jun 2011 23:11:16 GMT",
"version": "v3"
},
{
"created": "Tue, 5 Jul 2011 20:24:32 GMT",
"version": "v4"
}
] | 2015-05-19 | [
[
"Singh",
"Dinesh",
""
],
[
"Mobed",
"Nader",
""
]
] | A fundamentally different approach to path integral quantum mechanics in curved space-time is presented, as compared to the standard approaches currently available in the literature. Within the context of scalar particle propagation in a locally curved background, such as described by Fermi or Riemann normal co-ordinat... |
2301.02565 | Sanjay Mandal | Sanjay Mandal | Accelerated Expansion of the Universe in Non-minimally Coupled Gravity | Ph.D. Thesis. Some parts of this thesis are published in the
following journals: Physics of the Dark Universe, 28 (2020) 100551,
arXiv:2004.08211; Physical Review D, 102(2) (2020) 024057, arXiv:2008.01563;
Phys. Rev. D 102, 124029 (2020), arXiv:2011.00420; Astronomische Nachrichten,
342 (2021) 89-95, arXiv:2201... | null | 10.1103/PhysRevD.102.124029 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The accelerated expansion of the universe is the most debatable cosmological
scenario in the last two decades. Looking for the proper explanation of this
scenario, researchers have presented a lot of proposals to discuss it. However,
somehow, most of the proposal seems incomplete and needs to improve for a
better rep... | [
{
"created": "Thu, 5 Jan 2023 07:20:33 GMT",
"version": "v1"
}
] | 2023-01-11 | [
[
"Mandal",
"Sanjay",
""
]
] | The accelerated expansion of the universe is the most debatable cosmological scenario in the last two decades. Looking for the proper explanation of this scenario, researchers have presented a lot of proposals to discuss it. However, somehow, most of the proposal seems incomplete and needs to improve for a better repre... |
2001.08745 | Miguel Angel Garc\'ia-Aspeitia | Miguel A. Garc\'ia-Aspeitia and Celia Escamilla-Rivera | Gravitational waves in braneworlds after multi-messenger events | 10 pages, 4 figures. Accepted for publication in EPJC | null | 10.1140/epjc/s10052-020-7895-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The GW170817 event opened a new window to test modifications to General
Relativity with the aim of discard or impose strong constraints in extra
dimension theories of gravity. Concerning these theories, the Randall-Sundrum
brane-world theory -- 4+1 spacetime model where its covariant Einstein field
equations are comp... | [
{
"created": "Thu, 23 Jan 2020 15:38:08 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Mar 2020 18:13:55 GMT",
"version": "v2"
}
] | 2020-05-20 | [
[
"García-Aspeitia",
"Miguel A.",
""
],
[
"Escamilla-Rivera",
"Celia",
""
]
] | The GW170817 event opened a new window to test modifications to General Relativity with the aim of discard or impose strong constraints in extra dimension theories of gravity. Concerning these theories, the Randall-Sundrum brane-world theory -- 4+1 spacetime model where its covariant Einstein field equations are compos... |
0807.0543 | Amitabha Lahiri | Sourav Bhattacharya and Amitabha Lahiri | Effect of a positive cosmological constant on cosmic strings | v3:15pp. References and some explanations added; version accepted for
publication in Phys. Rev. D | Phys. Rev. D78 (2008) 065028 | 10.1103/PhysRevD.78.065028 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study cosmic Nielsen-Olesen strings in space-times with a positive
cosmological constant. For the free cosmic string in a cylindrically symmetric
space-time, we calculate the contribution of the cosmological constant to the
angle deficit, and to the bending of null geodesics. For a cosmic string in a
Schwarzschild... | [
{
"created": "Thu, 3 Jul 2008 12:16:20 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Jul 2008 06:48:37 GMT",
"version": "v2"
},
{
"created": "Sat, 23 Aug 2008 10:10:46 GMT",
"version": "v3"
}
] | 2008-12-31 | [
[
"Bhattacharya",
"Sourav",
""
],
[
"Lahiri",
"Amitabha",
""
]
] | We study cosmic Nielsen-Olesen strings in space-times with a positive cosmological constant. For the free cosmic string in a cylindrically symmetric space-time, we calculate the contribution of the cosmological constant to the angle deficit, and to the bending of null geodesics. For a cosmic string in a Schwarzschild-d... |
0709.2435 | H Mohseni Sadjadi | H. Mohseni Sadjadi | Generalized second law in modified theory of gravity | 9 pages, accepted for publication in Phys. Rev. D | Phys.Rev.D76:104024,2007 | 10.1103/PhysRevD.76.104024 | null | gr-qc astro-ph | null | In the context of modified theory of gravity (f(R) gravity) we try to study
the conditions required for validity of the generalized second law.
| [
{
"created": "Sat, 15 Sep 2007 17:55:44 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Oct 2007 17:42:29 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Sadjadi",
"H. Mohseni",
""
]
] | In the context of modified theory of gravity (f(R) gravity) we try to study the conditions required for validity of the generalized second law. |
1106.2538 | Gilles Esposito-Farese | Eugeny Babichev, Cedric Deffayet, Gilles Esposito-Farese | Improving relativistic MOND with Galileon k-mouflage | 6 pages, 1 figure, RevTeX4 format | Phys. Rev. D 84, 061502(R) (2011) | 10.1103/PhysRevD.84.061502 | LPT--Orsay 11/52 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a simple field theory reproducing the MOND phenomenology at galaxy
scale, while predicting negligible deviations from general relativity at small
scales thanks to an extended Vainshtein ("k-mouflage") mechanism induced by a
covariant Galileon-type Lagrangian. The model passes solar-system tests at the
post... | [
{
"created": "Mon, 13 Jun 2011 19:58:07 GMT",
"version": "v1"
}
] | 2011-09-15 | [
[
"Babichev",
"Eugeny",
""
],
[
"Deffayet",
"Cedric",
""
],
[
"Esposito-Farese",
"Gilles",
""
]
] | We propose a simple field theory reproducing the MOND phenomenology at galaxy scale, while predicting negligible deviations from general relativity at small scales thanks to an extended Vainshtein ("k-mouflage") mechanism induced by a covariant Galileon-type Lagrangian. The model passes solar-system tests at the post-N... |
1005.5078 | Lorenzo Iorio | Lorenzo Iorio | Phenomenological constraints on accretion of non-annihilating dark
matter on the PSR B1257+12 pulsar from orbital dynamics of its planets | LaTex2e, 25 pages, 4 tables, no figures. To appear in Journal of
Cosmology and Astroparticle Physics (JCAP) | JCAP 1011:046, 2010 | 10.1088/1475-7516/2010/11/046 | null | gr-qc astro-ph.SR hep-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analytically compute the effects that a mass variation rate \dot M/M of a
pulsar may have on the changes \Delta\tau in the times of arrival of its pulses
due to test particle companions, and on their orbital dynamics. We apply our
results to the planetary system of the PSR B1257+12 pulsar, located in the
Galaxy at... | [
{
"created": "Thu, 27 May 2010 14:22:49 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Jul 2010 14:35:12 GMT",
"version": "v2"
},
{
"created": "Sun, 21 Nov 2010 10:38:43 GMT",
"version": "v3"
}
] | 2010-12-01 | [
[
"Iorio",
"Lorenzo",
""
]
] | We analytically compute the effects that a mass variation rate \dot M/M of a pulsar may have on the changes \Delta\tau in the times of arrival of its pulses due to test particle companions, and on their orbital dynamics. We apply our results to the planetary system of the PSR B1257+12 pulsar, located in the Galaxy at 6... |
2407.01870 | Pameli Saha Dr. | Pameli Saha and Prabir Rudra | A Cosmological Holographic Reconstruction of f(Q) Theory | 34 pages, 60 figures | null | null | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | This paper explores a cosmological reconstruction scheme in the background of
f(Q) gravity theory from a Holographic perspective. The basic motivation for
this work is that the reconstruction is performed from a holographic origin,
which has its roots in the black hole thermodynamics and quantum gravity. Dark
energy ... | [
{
"created": "Tue, 2 Jul 2024 01:07:10 GMT",
"version": "v1"
}
] | 2024-07-03 | [
[
"Saha",
"Pameli",
""
],
[
"Rudra",
"Prabir",
""
]
] | This paper explores a cosmological reconstruction scheme in the background of f(Q) gravity theory from a Holographic perspective. The basic motivation for this work is that the reconstruction is performed from a holographic origin, which has its roots in the black hole thermodynamics and quantum gravity. Dark energy mo... |
2311.04683 | Rafael Hern\'andez-Jim\'enez | Daniel Pozo, Jordan Zambrano, Ismael Villegas, Rafael
Hern\'andez-Jim\'enez, and Clara Rojas | Some inflationary models under the light of Planck 2018 results | 34 pages, 13 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study four well-known inflationary scenarios that are
reported by the most recent Planck observations: Natural inflation, Hilltop
quartic inflation, Starobinsky inflationary model, and Large field power-law
potentials $V(\phi)\sim \phi^{p}$, considering $p=\sfrac{2}{3}, \sfrac{4}{3}$.
The analysis is ... | [
{
"created": "Wed, 8 Nov 2023 13:42:15 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Apr 2024 20:16:14 GMT",
"version": "v2"
}
] | 2024-04-30 | [
[
"Pozo",
"Daniel",
""
],
[
"Zambrano",
"Jordan",
""
],
[
"Villegas",
"Ismael",
""
],
[
"Hernández-Jiménez",
"Rafael",
""
],
[
"Rojas",
"Clara",
""
]
] | In this work we study four well-known inflationary scenarios that are reported by the most recent Planck observations: Natural inflation, Hilltop quartic inflation, Starobinsky inflationary model, and Large field power-law potentials $V(\phi)\sim \phi^{p}$, considering $p=\sfrac{2}{3}, \sfrac{4}{3}$. The analysis is do... |
gr-qc/0003110 | Amir H. Abbassi | Amir H.Abbassi and Amir M.Abbassi | The Newtonian Correspondence | 10 pages,no figure, Latex2e,revised,the title changed,references
added | Foundations of Physics Letters,Vol.14,No.6(Dec.2001)573-580 | null | null | gr-qc | null | It is shown that the field equations of general relativity in the Einstein
tensor form and the unimodular theory of gravity do not fulfill the
correspondence principle commitment completely. The consistent formalisms are
briefly discussed.
| [
{
"created": "Thu, 30 Mar 2000 10:59:03 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Dec 2001 07:20:52 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Abbassi",
"Amir H.",
""
],
[
"Abbassi",
"Amir M.",
""
]
] | It is shown that the field equations of general relativity in the Einstein tensor form and the unimodular theory of gravity do not fulfill the correspondence principle commitment completely. The consistent formalisms are briefly discussed. |
2201.12030 | Oscar Castillo Felisola Dr. | Oscar Castillo-Felisola and Bastian Grez and Oscar Orellana and Jose
Perdiguero and Francisca Ramirez and Aureliano Skirzewski and Alfonso R.
Zerwekh | Polynomial affine model of gravity in three-dimensions | 14 pages, 2 figures | Universe 2022, 8(2), 68 | 10.3390/universe8020068 | null | gr-qc hep-th math-ph math.DG math.MP | http://creativecommons.org/licenses/by/4.0/ | In this work, we explore a three-dimensional formulation of the polynomial
affine model of gravity, which is a model that extends general relativity by
relaxing the equivalence principle through the exclusion of the metric from the
set of fundamental fields. In particular, in an attempt to gain insight of the
role of... | [
{
"created": "Fri, 28 Jan 2022 10:45:21 GMT",
"version": "v1"
}
] | 2022-01-31 | [
[
"Castillo-Felisola",
"Oscar",
""
],
[
"Grez",
"Bastian",
""
],
[
"Orellana",
"Oscar",
""
],
[
"Perdiguero",
"Jose",
""
],
[
"Ramirez",
"Francisca",
""
],
[
"Skirzewski",
"Aureliano",
""
],
[
"Zerwekh",
"Alfonso... | In this work, we explore a three-dimensional formulation of the polynomial affine model of gravity, which is a model that extends general relativity by relaxing the equivalence principle through the exclusion of the metric from the set of fundamental fields. In particular, in an attempt to gain insight of the role of t... |
2203.09968 | Shahram Jalalzadeh | S. Jalalzadeh | Quantum Black hole--White hole entangled states | 7 pages, 1 figure, to appear in Phys. Lett. B | Phys. Lett. B 829, 137058 (2022) | 10.1016/j.physletb.2022.137058 | null | gr-qc hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the quantum deformation of the Wheeler--DeWitt equation of a
Schwarzchild black hole. Specifically, the quantum deformed black hole is a
quantized model constructed from the quantum Heisenberg--Weyl $U_q(h_4)$ group.
We show that the event horizon area and the mass are quantized, degenerate, and
bounde... | [
{
"created": "Fri, 18 Mar 2022 14:02:52 GMT",
"version": "v1"
}
] | 2022-04-18 | [
[
"Jalalzadeh",
"S.",
""
]
] | We investigate the quantum deformation of the Wheeler--DeWitt equation of a Schwarzchild black hole. Specifically, the quantum deformed black hole is a quantized model constructed from the quantum Heisenberg--Weyl $U_q(h_4)$ group. We show that the event horizon area and the mass are quantized, degenerate, and bounded.... |
gr-qc/0511068 | Edward Anderson | E. Anderson | Relational Particle Models. I. Reconciliation with standard classical
and quantum theory | References Updated | Class.Quant.Grav.23:2469-2490,2006 | 10.1088/0264-9381/23/7/016 | null | gr-qc | null | This paper concerns the absolute versus relative motion debate. The Barbour
and Bertotti 1982 work may be viewed as an indirectly set up relational
formulation of a portion of Newtonian mechanics. I consider further direct
formulations of this and argue that the portion in question -- universes with
zero total angula... | [
{
"created": "Mon, 14 Nov 2005 07:45:58 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Aug 2006 20:00:06 GMT",
"version": "v2"
},
{
"created": "Fri, 2 Nov 2007 13:32:53 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Anderson",
"E.",
""
]
] | This paper concerns the absolute versus relative motion debate. The Barbour and Bertotti 1982 work may be viewed as an indirectly set up relational formulation of a portion of Newtonian mechanics. I consider further direct formulations of this and argue that the portion in question -- universes with zero total angular ... |
gr-qc/0106025 | Hans-Juergen Schmidt | M. V. Gorbatenko, A. V. Pushkin, H.-J. Schmidt | On a relation between the Bach equation and the equation of
geometrodynamics | 16 pages, LaTeX, no figures | Gen.Rel.Grav. 34 (2002) 9-22 | 10.1023/A:1015258219933 | preprint UNIPO-MATH-01-Jun-06 | gr-qc | null | The Bach equation and the equation of geometrodynamics are based on two quite
different physical motivations, but in both approaches, the conformal
properties of gravitation plays the key role. In this paper we present an
analysis of the relation between these two equations and show that the
solutions of the equation... | [
{
"created": "Thu, 7 Jun 2001 14:49:10 GMT",
"version": "v1"
}
] | 2021-10-20 | [
[
"Gorbatenko",
"M. V.",
""
],
[
"Pushkin",
"A. V.",
""
],
[
"Schmidt",
"H. -J.",
""
]
] | The Bach equation and the equation of geometrodynamics are based on two quite different physical motivations, but in both approaches, the conformal properties of gravitation plays the key role. In this paper we present an analysis of the relation between these two equations and show that the solutions of the equation o... |
gr-qc/0702002 | Jian-Yang Zhu | Hua-Hui Xiong and Jian-Yang Zhu | Effect of the Inverse Volume Modification in Loop Quantum Cosmology | revised version | Chin.Phys.Lett.28:030401,2011 | 10.1088/0256-307X/28/3/030401 | null | gr-qc | null | It is known that in loop quantum cosmology (LQC) the universe avoids the
singularity by a bounce when the matter density approaches the critical density
$\rho_c$ (the order of Planck density). After incorporating the inverse volume
modifications both in the gravitational and matter part in the improved
framework of L... | [
{
"created": "Thu, 1 Feb 2007 04:58:06 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Apr 2007 14:01:11 GMT",
"version": "v2"
}
] | 2011-03-14 | [
[
"Xiong",
"Hua-Hui",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | It is known that in loop quantum cosmology (LQC) the universe avoids the singularity by a bounce when the matter density approaches the critical density $\rho_c$ (the order of Planck density). After incorporating the inverse volume modifications both in the gravitational and matter part in the improved framework of LQC... |
0910.0380 | Edward Porter | Leone Bosi and Edward K. Porter | Data Analysis Challenges for the Einstein Telescope | 18 pages, Invited review for Einstein Telescope special edition of
GRG | Gen.Rel.Grav.43:519-535,2011 | 10.1007/s10714-010-1084-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein Telescope is a proposed third generation gravitational wave
detector that will operate in the region of 1 Hz to a few kHz. As well as the
inspiral of compact binaries composed of neutron stars or black holes, the
lower frequency cut-off of the detector will open the window to a number of new
sources. The... | [
{
"created": "Fri, 2 Oct 2009 11:37:05 GMT",
"version": "v1"
}
] | 2011-01-28 | [
[
"Bosi",
"Leone",
""
],
[
"Porter",
"Edward K.",
""
]
] | The Einstein Telescope is a proposed third generation gravitational wave detector that will operate in the region of 1 Hz to a few kHz. As well as the inspiral of compact binaries composed of neutron stars or black holes, the lower frequency cut-off of the detector will open the window to a number of new sources. These... |
1602.03898 | Saheb Soroushfar | Bahareh Hoseini, Reza Saffari, Saheb Soroushfar, Jutta Kunz, Saskia
Grunau | Analytic treatment of complete geodesics in a static cylindrically
symmetric conformal spacetime | 23 pages,3 tables,14 figures, Accepted for publication in Physical
Review D | Phys. Rev. D 94, 044021 (2016) | 10.1103/PhysRevD.94.044021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the motion of test particles and light rays in a static
cylindrically symmetric conformal spacetime given by Said et al [1]. We derive
the equations of motion and present their analytical solutions in terms of the
Weierstrass {\wp} function and the Kleinian {\sigma} function. Using parametric
diagrams and... | [
{
"created": "Thu, 11 Feb 2016 21:07:13 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Feb 2016 10:28:49 GMT",
"version": "v2"
},
{
"created": "Fri, 20 May 2016 14:38:49 GMT",
"version": "v3"
},
{
"created": "Sat, 30 Jul 2016 18:22:23 GMT",
"version": "v4"
}
] | 2016-08-16 | [
[
"Hoseini",
"Bahareh",
""
],
[
"Saffari",
"Reza",
""
],
[
"Soroushfar",
"Saheb",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Grunau",
"Saskia",
""
]
] | We consider the motion of test particles and light rays in a static cylindrically symmetric conformal spacetime given by Said et al [1]. We derive the equations of motion and present their analytical solutions in terms of the Weierstrass {\wp} function and the Kleinian {\sigma} function. Using parametric diagrams and e... |
2207.10086 | Lorenzo Speri | Lorenzo Speri, Andrea Antonelli, Laura Sberna, Stanislav Babak, Enrico
Barausse, Jonathan R. Gair, Michael L. Katz | Probing Accretion Physics with Gravitational Waves | null | Phys. Rev. X 13, 021035 (2023) | 10.1103/PhysRevX.13.021035 | null | gr-qc astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | Gravitational-wave observations of extreme mass ratio inspirals (EMRIs) offer
the opportunity to probe the environments of active galactic nuclei (AGN)
through the torques that accretion disks induce on the binary. Within a
Bayesian framework, we study how well such environmental effects can be
measured using gravita... | [
{
"created": "Wed, 20 Jul 2022 18:00:00 GMT",
"version": "v1"
},
{
"created": "Tue, 23 May 2023 10:41:24 GMT",
"version": "v2"
},
{
"created": "Mon, 14 Aug 2023 09:43:26 GMT",
"version": "v3"
}
] | 2023-08-15 | [
[
"Speri",
"Lorenzo",
""
],
[
"Antonelli",
"Andrea",
""
],
[
"Sberna",
"Laura",
""
],
[
"Babak",
"Stanislav",
""
],
[
"Barausse",
"Enrico",
""
],
[
"Gair",
"Jonathan R.",
""
],
[
"Katz",
"Michael L.",
""
]
... | Gravitational-wave observations of extreme mass ratio inspirals (EMRIs) offer the opportunity to probe the environments of active galactic nuclei (AGN) through the torques that accretion disks induce on the binary. Within a Bayesian framework, we study how well such environmental effects can be measured using gravitati... |
1110.2492 | Radouane Gannouji | Radouane Gannouji, Hemwati Nandan, Naresh Dadhich | FLRW cosmology in Weyl-Integrable Space-Time | 8 pages, 2 figures, version published in JCAP | JCAP11(2011)051 | 10.1088/1475-7516/2011/11/051 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the Weyl space-time extension of general relativity (GR) for
studying the FLRW cosmology through focusing and defocusing of the geodesic
congruences. We have derived the equations of evolution for expansion, shear
and rotation in the Weyl space-time. In particular we consider the Starobinsky
modificati... | [
{
"created": "Tue, 11 Oct 2011 20:02:49 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Dec 2011 02:12:42 GMT",
"version": "v2"
}
] | 2011-12-06 | [
[
"Gannouji",
"Radouane",
""
],
[
"Nandan",
"Hemwati",
""
],
[
"Dadhich",
"Naresh",
""
]
] | We investigate the Weyl space-time extension of general relativity (GR) for studying the FLRW cosmology through focusing and defocusing of the geodesic congruences. We have derived the equations of evolution for expansion, shear and rotation in the Weyl space-time. In particular we consider the Starobinsky modification... |
1703.00307 | Hermano Velten | Hermano Velten, Jose Beltr\'an Jim\'enez and Federico Piazza | Limits on the anomalous speed of gravitational waves from binary pulsars | 6 pages, 1 figure, Prepared for the IWARA2016 proceedings | null | 10.1142/S2010194517600163 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A large class of modified theories of gravity used as models for dark energy
predict a propagation speed for gravitational waves which can differ from the
speed of light. This difference of propagations speeds for photons and
gravitons has an impact in the emission of gravitational waves by binary
systems. Thus, we r... | [
{
"created": "Tue, 28 Feb 2017 12:57:34 GMT",
"version": "v1"
}
] | 2017-09-06 | [
[
"Velten",
"Hermano",
""
],
[
"Jiménez",
"Jose Beltrán",
""
],
[
"Piazza",
"Federico",
""
]
] | A large class of modified theories of gravity used as models for dark energy predict a propagation speed for gravitational waves which can differ from the speed of light. This difference of propagations speeds for photons and gravitons has an impact in the emission of gravitational waves by binary systems. Thus, we rev... |
1002.2929 | Alberto Rozas-Fernandez | Alberto Rozas-Fern\'andez, David Brizuela and Norman Cruz | Interacting holographic tachyon model of dark energy | 7 pages, 8 figures, accepted for publication in IJMPD | Int. J. Mod. Phys. D 19, 573 (2010) | 10.1142/S0218271810016580 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a holographic tachyon model of dark energy with interaction
between the components of the dark sector. The correspondence between the
tachyon field and the holographic dark energy densities allows the
reconstruction of the potential and the dynamics of the tachyon scalar field in
a flat Friedmann-Robertson... | [
{
"created": "Mon, 15 Feb 2010 18:22:00 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Apr 2010 20:18:33 GMT",
"version": "v2"
}
] | 2010-11-25 | [
[
"Rozas-Fernández",
"Alberto",
""
],
[
"Brizuela",
"David",
""
],
[
"Cruz",
"Norman",
""
]
] | We propose a holographic tachyon model of dark energy with interaction between the components of the dark sector. The correspondence between the tachyon field and the holographic dark energy densities allows the reconstruction of the potential and the dynamics of the tachyon scalar field in a flat Friedmann-Robertson-W... |
1601.07585 | Boris Bolliet | Boris Bolliet, Richard A. Battye, Jonathan A. Pearson | The Equation of State Approach to Cosmological Perturbations in f(R)
Gravity | This short article is to appear in the Conference Proceedings of the
XIV Marcel Grossmann Meeting (July 2015) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The discovery of apparent cosmological acceleration has spawned a huge number
of dark energy and modified gravity theories. The f(R) models of gravity are
obtained when one replaces the Ricci scalar in the Einstein-Hilbert action by
an arbitrary function of the Ricci scalar. In this work we provide expressions
for th... | [
{
"created": "Wed, 27 Jan 2016 22:04:30 GMT",
"version": "v1"
},
{
"created": "Fri, 5 Feb 2016 10:35:48 GMT",
"version": "v2"
}
] | 2016-02-08 | [
[
"Bolliet",
"Boris",
""
],
[
"Battye",
"Richard A.",
""
],
[
"Pearson",
"Jonathan A.",
""
]
] | The discovery of apparent cosmological acceleration has spawned a huge number of dark energy and modified gravity theories. The f(R) models of gravity are obtained when one replaces the Ricci scalar in the Einstein-Hilbert action by an arbitrary function of the Ricci scalar. In this work we provide expressions for the ... |
1407.5481 | Gilberto Medeiros Kremer | Guilherme Grams, Rudinei C. de Souza and Gilberto M. Kremer | Fermion field as inflaton, dark energy and dark matter | 17 pages, 3 figures. To appear in Classical and Quantum Gravity | Class. Quantum Grav. 31 (2014) 185008 | 10.1088/0264-9381/31/18/185008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The search for constituents that can explain the periods of accelerating
expansion of the Universe is a fundamental topic in cosmology. In this context,
we investigate how fermionic fields minimally and non-minimally coupled with
the gravitational field may be responsible for accelerated regimes during the
evolution ... | [
{
"created": "Mon, 21 Jul 2014 13:06:10 GMT",
"version": "v1"
}
] | 2014-12-23 | [
[
"Grams",
"Guilherme",
""
],
[
"de Souza",
"Rudinei C.",
""
],
[
"Kremer",
"Gilberto M.",
""
]
] | The search for constituents that can explain the periods of accelerating expansion of the Universe is a fundamental topic in cosmology. In this context, we investigate how fermionic fields minimally and non-minimally coupled with the gravitational field may be responsible for accelerated regimes during the evolution of... |
1810.03461 | Simone Peirone MSc | Noemi Frusciante, Georgios Papadomanolakis, Simone Peirone and
Alessandra Silvestri | The role of the tachyonic instability in Horndeski gravity | 9 pages, 4 figures - accepted version by JCAP | J. Cosmol. Astropart. Phys. 02(2019)029 | 10.1088/1475-7516/2019/02/029 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The tachyonic instability is associated with the unboundedness of the
Hamiltonian from below and results in an unstable low-$k$ regime. In the
cosmological exploration of modified gravity, it is seldom taken into account,
with more focus given to the popular no-ghost and no-gradient conditions. The
latter though are ... | [
{
"created": "Thu, 4 Oct 2018 17:58:31 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Feb 2019 10:27:16 GMT",
"version": "v2"
}
] | 2019-02-19 | [
[
"Frusciante",
"Noemi",
""
],
[
"Papadomanolakis",
"Georgios",
""
],
[
"Peirone",
"Simone",
""
],
[
"Silvestri",
"Alessandra",
""
]
] | The tachyonic instability is associated with the unboundedness of the Hamiltonian from below and results in an unstable low-$k$ regime. In the cosmological exploration of modified gravity, it is seldom taken into account, with more focus given to the popular no-ghost and no-gradient conditions. The latter though are in... |
2101.09148 | Pablo Le\'on | C. Las Heras, P. Leon | New interpretation of the Extended Geometric Deformation in Isotropic
Coordinates | 27 pages, 15 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the particular case in which Extended Geometric Deformation does
consists of consecutive deformations of temporal and spatial components of the
metric, in Schwarzschild-like and isotropic coordinates. In the latter, we
present two inequivalent ways to perform this 2-steps GD. This was done in such
a way that... | [
{
"created": "Fri, 22 Jan 2021 15:13:58 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jan 2021 02:26:57 GMT",
"version": "v2"
},
{
"created": "Sun, 31 Jan 2021 20:02:17 GMT",
"version": "v3"
},
{
"created": "Mon, 26 Jul 2021 22:46:26 GMT",
"version": "v4"
}
] | 2021-07-28 | [
[
"Heras",
"C. Las",
""
],
[
"Leon",
"P.",
""
]
] | We study the particular case in which Extended Geometric Deformation does consists of consecutive deformations of temporal and spatial components of the metric, in Schwarzschild-like and isotropic coordinates. In the latter, we present two inequivalent ways to perform this 2-steps GD. This was done in such a way that t... |
gr-qc/0403039 | Ragab Gad | Ragab M. Gad | M{\o}ller Energy-Momentum Complex of a Static Axially Symmetric Vacuum
Space-Time | LATEX, 9 pages, no figures, an improved version, references added,
corrections [Admin note: substantial overlap with gr-qc/0403097,
gr-qc/0404108 , gr-qc/0303009 , hep-th/0311050 ] | Astrophys.SpaceSci.302:141-144,2006; Erratum-ibid.314:369,2008 | 10.1007/s10509-008-9797-4 | null | gr-qc | null | The energy and momentum densities associated with the Weyl metric are
calculated using M{\o}ller's energy-momentum complex. These results are
compared with the results obtained by using the energy-momentum complexes of
Einstein, Landau and Lifshitz, Papapetrou and Bergmann. We show that the
aforementioned different p... | [
{
"created": "Tue, 9 Mar 2004 11:36:55 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Mar 2004 21:09:43 GMT",
"version": "v2"
},
{
"created": "Sun, 24 Jul 2005 10:15:46 GMT",
"version": "v3"
},
{
"created": "Thu, 2 Mar 2006 13:08:51 GMT",
"version": "v4"
},
{
"cre... | 2008-11-26 | [
[
"Gad",
"Ragab M.",
""
]
] | The energy and momentum densities associated with the Weyl metric are calculated using M{\o}ller's energy-momentum complex. These results are compared with the results obtained by using the energy-momentum complexes of Einstein, Landau and Lifshitz, Papapetrou and Bergmann. We show that the aforementioned different pre... |
1909.12808 | Hossein Mohseni Sadjadi | H. Mohseni Sadjadi, M. Khodaei | No scalar hair in nonminimal derivative coupling model for Neumann and
Dirichlet reflecting star | 10 pages, typos corrected | Physics Letters B 799 (2019) 135031 | 10.1016/j.physletb.2019.135031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the existence of scalar hair in the background of a reflecting
star. The kinetic part of the scalar field is nonminimally coupled to the
Einstein tensor. For both the Dirichlet and the Neumann boundary conditions, we
study the no-hair theorem. For the massless case, we show that there is no
scalar hair... | [
{
"created": "Tue, 24 Sep 2019 10:21:04 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Oct 2019 08:59:26 GMT",
"version": "v2"
},
{
"created": "Sat, 26 Oct 2019 10:15:45 GMT",
"version": "v3"
}
] | 2019-10-29 | [
[
"Sadjadi",
"H. Mohseni",
""
],
[
"Khodaei",
"M.",
""
]
] | We investigate the existence of scalar hair in the background of a reflecting star. The kinetic part of the scalar field is nonminimally coupled to the Einstein tensor. For both the Dirichlet and the Neumann boundary conditions, we study the no-hair theorem. For the massless case, we show that there is no scalar hair, ... |
1203.2290 | Artyom Astashenok V | Artyom V. Astashenok, Antonino Del Popolo | Cosmological measure with volume averaging and the vacuum energy problem | null | Class. Quantum Grav. 29 (2012) 085014 | 10.1088/0264-9381/29/8/085014 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we give a possible solution to the cosmological constant
problem. It is shown hat the traditional approach, based on volume weighting of
probabilities, leads to an incoherent onclusion: the probability that a
randomly chosen observer measures $\Lambda=0$ is exactly equal to 1. Using an
alternative, vol... | [
{
"created": "Thu, 8 Mar 2012 17:56:09 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Mar 2012 08:14:44 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Apr 2012 06:36:24 GMT",
"version": "v3"
}
] | 2015-06-04 | [
[
"Astashenok",
"Artyom V.",
""
],
[
"Del Popolo",
"Antonino",
""
]
] | In this paper, we give a possible solution to the cosmological constant problem. It is shown hat the traditional approach, based on volume weighting of probabilities, leads to an incoherent onclusion: the probability that a randomly chosen observer measures $\Lambda=0$ is exactly equal to 1. Using an alternative, volum... |
1504.04724 | Jan Harms | Jan Harms and Ho Jung Paik | Newtonian-noise cancellation in full-tensor gravitational-wave detectors | 23 pages, 9 figures, submitted to PRD | Phys. Rev. D 92, 022001 (2015) | 10.1103/PhysRevD.92.022001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Terrestrial gravity noise, also known as Newtonian noise, produced by ambient
seismic and infrasound fields will pose one of the main sensitivity limitations
in low-frequency, ground-based, gravitational-wave (GW) detectors. It was
estimated that this noise foreground needs to be suppressed by about 3 -- 5
orders of ... | [
{
"created": "Sat, 18 Apr 2015 14:39:09 GMT",
"version": "v1"
}
] | 2015-07-08 | [
[
"Harms",
"Jan",
""
],
[
"Paik",
"Ho Jung",
""
]
] | Terrestrial gravity noise, also known as Newtonian noise, produced by ambient seismic and infrasound fields will pose one of the main sensitivity limitations in low-frequency, ground-based, gravitational-wave (GW) detectors. It was estimated that this noise foreground needs to be suppressed by about 3 -- 5 orders of ma... |
1411.1164 | Narayan Banerjee | Nandan Roy and Narayan Banerjee | Dynamical systems study of Chameleon scalar field | 19 pages, 11 figures, 8 tables | Annals Phys. 356 (2015) 452-466 | 10.1016/j.aop.2015.03.013 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present work is an extensive study of the viable stable solutions of
chameleon scalar field models leading to possibilities of an accelerated
expansion of the universe. It is found that for various combinations of the
chameleon field potential $V(\phi)$ and the coupling $f(\phi)$ of the chameleon
field with matte... | [
{
"created": "Wed, 5 Nov 2014 06:38:32 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jan 2016 06:08:07 GMT",
"version": "v2"
}
] | 2016-01-20 | [
[
"Roy",
"Nandan",
""
],
[
"Banerjee",
"Narayan",
""
]
] | The present work is an extensive study of the viable stable solutions of chameleon scalar field models leading to possibilities of an accelerated expansion of the universe. It is found that for various combinations of the chameleon field potential $V(\phi)$ and the coupling $f(\phi)$ of the chameleon field with matter,... |
1103.0537 | Peter Kazinski | P.O. Kazinski | Comment on "Finite size corrections to the radiation reaction force in
classical electrodynamics" [[arXiv:1005.2617] | 1 page | null | null | null | gr-qc hep-th physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I show that the main statement of [Phys. Rev. Lett. 105, 094802 (2010),
arXiv:1005.2617] is wrong. Other inconsistences of this Letter are also
discussed.
| [
{
"created": "Wed, 2 Mar 2011 20:42:30 GMT",
"version": "v1"
}
] | 2011-03-03 | [
[
"Kazinski",
"P. O.",
""
]
] | I show that the main statement of [Phys. Rev. Lett. 105, 094802 (2010), arXiv:1005.2617] is wrong. Other inconsistences of this Letter are also discussed. |
gr-qc/0306077 | Benedict Cusack | Benedict J Cusack, Benjamin S Sheard, Daniel A Shaddock, Malcolm B
Gray, Ping Koy Lam, Stan E Whitcomb | Study of an electro-optic modulator capable of generating simultaneous
amplitude and phase modulations | 12 pages, 8 figures, 1 table | null | 10.1364/AO.43.005079 | null | gr-qc | null | We report on the analysis and prototype-characterization of a dual-electrode
electro-optic modulator that can generate both amplitude and phase modulations
with a selectable relative phase, termed a universally tunable modulator (UTM).
All modulation states can be reached by tuning only the electrical inputs,
facilit... | [
{
"created": "Tue, 17 Jun 2003 07:14:29 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Aug 2003 06:49:24 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Cusack",
"Benedict J",
""
],
[
"Sheard",
"Benjamin S",
""
],
[
"Shaddock",
"Daniel A",
""
],
[
"Gray",
"Malcolm B",
""
],
[
"Lam",
"Ping Koy",
""
],
[
"Whitcomb",
"Stan E",
""
]
] | We report on the analysis and prototype-characterization of a dual-electrode electro-optic modulator that can generate both amplitude and phase modulations with a selectable relative phase, termed a universally tunable modulator (UTM). All modulation states can be reached by tuning only the electrical inputs, facilitat... |
gr-qc/0312058 | Joan Josep Ferrando | Bartolom\'e Coll and Joan Josep Ferrando | On the thermodynamics of inhomogeneous perfect fluid mixtures | 6 pages | null | null | null | gr-qc | null | It is shown that inhomogeneous Szekeres and Stephani universes exist
corresponding to non-dissipative binary mixtures of perfect fluids in local
thermal equilibrium. This result contradicts a recent statement by Z\'arate and
Quevedo (2004 Class. Quantum Grav. {\bf 21} 197, {\it Preprint} gr-qc/0310087),
which affirms... | [
{
"created": "Wed, 10 Dec 2003 11:17:39 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Coll",
"Bartolomé",
""
],
[
"Ferrando",
"Joan Josep",
""
]
] | It is shown that inhomogeneous Szekeres and Stephani universes exist corresponding to non-dissipative binary mixtures of perfect fluids in local thermal equilibrium. This result contradicts a recent statement by Z\'arate and Quevedo (2004 Class. Quantum Grav. {\bf 21} 197, {\it Preprint} gr-qc/0310087), which affirms t... |
1907.01905 | Oindrila Ganguly | Oindrila Ganguly | Acoustic Hawking radiation from an evolving horizon in a dynamical
analogue spacetime | 5 pages; title slightly altered, abstract and main body modified, a
new derivation of surface gravity added, observable difference between
dynamical Hawking radiation and dynamical Casimir effect discussed | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Our knowledge of dynamical black holes suffers from a lack of observational
insight. In an analogue model of gravity, we can design a longitudinally
symmetric dynamical acoustic black hole with a moving horizon. In this
symmetric spacetime, the marginally outer trapped surface and the so called
evolving horizon are d... | [
{
"created": "Wed, 3 Jul 2019 12:52:14 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Jun 2021 13:42:48 GMT",
"version": "v2"
}
] | 2021-06-29 | [
[
"Ganguly",
"Oindrila",
""
]
] | Our knowledge of dynamical black holes suffers from a lack of observational insight. In an analogue model of gravity, we can design a longitudinally symmetric dynamical acoustic black hole with a moving horizon. In this symmetric spacetime, the marginally outer trapped surface and the so called evolving horizon are deg... |
2104.11742 | Claudia Moreno | Claudia Moreno, Juan Carlos Degollado, Dar\'io N\'u\~nez, Carlos
Rodriguez-Leal | Gravitational and electromagnetic perturbations of a charged black hole
in a general gauge condition | 21 pages, 6 figures, 1 table | Particles MDPI 2021, 4(2), 106-128 | 10.3390/particles4020012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a set of coupled equations for the gravitational and
electromagnetic perturbation in the Reissner-Nordstr\"om geometry using the
Newman Penrose formalism. We show that the information of the physical
gravitational signal is contained in the Weyl scalar function $\Psi_4$, as is
well known, but for the electr... | [
{
"created": "Fri, 23 Apr 2021 17:53:03 GMT",
"version": "v1"
}
] | 2021-04-26 | [
[
"Moreno",
"Claudia",
""
],
[
"Degollado",
"Juan Carlos",
""
],
[
"Núñez",
"Darío",
""
],
[
"Rodriguez-Leal",
"Carlos",
""
]
] | We derive a set of coupled equations for the gravitational and electromagnetic perturbation in the Reissner-Nordstr\"om geometry using the Newman Penrose formalism. We show that the information of the physical gravitational signal is contained in the Weyl scalar function $\Psi_4$, as is well known, but for the electrom... |
1507.04264 | Francisco Frutos-Alfaro Dr. rer. nat. | Francisco Frutos-Alfaro and Michael Soffel | On the Post-linear Quadrupole-Quadrupole Metric | null | Revista de Matematica: Teoria y Aplicaciones, Vol 24 (2), 239-255,
2017 | 10.15517/rmta.v24i2.29856 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hartle-Thorne metric defines a reliable spacetime for most astrophysical
purposes, for instance for the simulation of slowly rotating stars. Solving the
Einstein field equations, we added terms of second order in the quadrupole
moment to its post-linear version in order to compare it with solutions found
by Blanc... | [
{
"created": "Wed, 15 Jul 2015 15:43:03 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Aug 2015 00:19:04 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Sep 2015 01:34:23 GMT",
"version": "v3"
},
{
"created": "Thu, 23 Jun 2016 03:21:11 GMT",
"version": "v4"
},
{
"c... | 2018-11-30 | [
[
"Frutos-Alfaro",
"Francisco",
""
],
[
"Soffel",
"Michael",
""
]
] | The Hartle-Thorne metric defines a reliable spacetime for most astrophysical purposes, for instance for the simulation of slowly rotating stars. Solving the Einstein field equations, we added terms of second order in the quadrupole moment to its post-linear version in order to compare it with solutions found by Blanche... |
gr-qc/9502015 | Jorge Cervantes | P. Chauvet and J.L. Cervantes-Cota | Isotropization of Bianchi-Type Cosmological Solutions in Brans-Dicke
Theory | 15 pages, Latex | Phys.Rev. D52 (1995) 3416-3423 | 10.1103/PhysRevD.52.3416 | null | gr-qc | null | The cosmic, general analitic solutions of the Brans--Dicke Theory for the
flat space of homogeneous and isotropic models containing perfect, barotropic,
fluids are seen to belong to a wider class of solutions --which includes
cosmological models with the open and the closed spaces of the
Friedmann--Robertson--Walker ... | [
{
"created": "Tue, 7 Feb 1995 10:57:27 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Chauvet",
"P.",
""
],
[
"Cervantes-Cota",
"J. L.",
""
]
] | The cosmic, general analitic solutions of the Brans--Dicke Theory for the flat space of homogeneous and isotropic models containing perfect, barotropic, fluids are seen to belong to a wider class of solutions --which includes cosmological models with the open and the closed spaces of the Friedmann--Robertson--Walker me... |
gr-qc/9710062 | null | Reinoud J. Slagter (University of Amsterdam) | On the Causal Structure of Spinning Einstein-Yang-Mills-Higgs Strings | 3 pages in Revtex. To appear in the proceedings of the 8-th Marcel
Grossmann meeting (Jerusalem, Israel, June 1997) | null | null | null | gr-qc | null | It is claimed that it will be exceedingly unlikely to obtain CTC's in the
spacetime of a spinning EYMH-string. It is conjectured that the pathological
problems concerning the induced angular momentum and helical structure of time
that afflict the U(1)-gauge string, will be solved in the non-abelian YM string
model. I... | [
{
"created": "Fri, 10 Oct 1997 18:24:21 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Slagter",
"Reinoud J.",
"",
"University of Amsterdam"
]
] | It is claimed that it will be exceedingly unlikely to obtain CTC's in the spacetime of a spinning EYMH-string. It is conjectured that the pathological problems concerning the induced angular momentum and helical structure of time that afflict the U(1)-gauge string, will be solved in the non-abelian YM string model. In ... |
1410.1738 | Bijan Saha Dr. | Bijan Saha | Interacting Scalar and Electromagnetic Fields in $f(R,\,T)$ Theory of
Gravity | 12 pages | null | 10.1007/s10773-015-2615-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the scope of $f(R,\,T)$ gravity we have studied the interacting scalar
and electromagnetic fields in a Bianchi type I universe. It was found that if
the study is confined to the case $f(R,\,T) = R + \lambda f(T)$, the system is
completely given by the equations similar to Einstein gravity. Moreover, the
presen... | [
{
"created": "Tue, 7 Oct 2014 14:17:44 GMT",
"version": "v1"
}
] | 2015-05-01 | [
[
"Saha",
"Bijan",
""
]
] | Within the scope of $f(R,\,T)$ gravity we have studied the interacting scalar and electromagnetic fields in a Bianchi type I universe. It was found that if the study is confined to the case $f(R,\,T) = R + \lambda f(T)$, the system is completely given by the equations similar to Einstein gravity. Moreover, the present ... |
1904.09961 | Frans Klinkhamer | F.R. Klinkhamer, Z.L. Wang | Nonsingular bouncing cosmology from general relativity | 16 pages, 7 figures, v6: published version | Phys. Rev. D 100, 083534 (2019) | 10.1103/PhysRevD.100.083534 | KA-TP-06-2019 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a particular type of classical nonsingular bouncing cosmology,
which results from general relativity if we allow for degenerate metrics. The
simplest model has a matter content with a constant equation-of-state parameter
and we get the modified Hubble diagrams for both the luminosity distance and
the a... | [
{
"created": "Mon, 22 Apr 2019 17:30:31 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Apr 2019 17:17:30 GMT",
"version": "v2"
},
{
"created": "Thu, 27 Jun 2019 17:25:35 GMT",
"version": "v3"
},
{
"created": "Mon, 26 Aug 2019 15:22:00 GMT",
"version": "v4"
},
{
"c... | 2019-10-23 | [
[
"Klinkhamer",
"F. R.",
""
],
[
"Wang",
"Z. L.",
""
]
] | We investigate a particular type of classical nonsingular bouncing cosmology, which results from general relativity if we allow for degenerate metrics. The simplest model has a matter content with a constant equation-of-state parameter and we get the modified Hubble diagrams for both the luminosity distance and the ang... |
1908.00408 | Ritabrata Biswas | Promila Biswas, Parthajit Roy and Ritabrata Biswas | Posing Constraints on the Free Parameters of a New Model of Dark Energy
EoS : Responses Through Cosmological Behaviours | 18 pages, 20 figures, 6 tables | null | 10.1007/s10509-020-03829-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Since the late 1990's observations of type Ia Supernova, our universe is
predicted to experience a late time cosmic acceleration. Theoretical support to
this observation were intended to be built via proposition of a hypothetical
fluid which staying inside the universe exerts negative pressure. Cosmologists
have pres... | [
{
"created": "Wed, 31 Jul 2019 13:54:01 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Feb 2020 09:32:27 GMT",
"version": "v2"
},
{
"created": "Fri, 7 Aug 2020 09:44:41 GMT",
"version": "v3"
}
] | 2020-08-10 | [
[
"Biswas",
"Promila",
""
],
[
"Roy",
"Parthajit",
""
],
[
"Biswas",
"Ritabrata",
""
]
] | Since the late 1990's observations of type Ia Supernova, our universe is predicted to experience a late time cosmic acceleration. Theoretical support to this observation were intended to be built via proposition of a hypothetical fluid which staying inside the universe exerts negative pressure. Cosmologists have prescr... |
1707.01605 | Jun-Jin Peng | Yi-De Jing and Jun-Jin Peng | A note on the mass of Kerr-AdS black holes in the off-shell generalized
ADT formalism | 17 pages, to appear in Chinese Physics B | Chin. Phys. B, 2017, 26(10):100401 | 10.1088/1674-1056/26/10/100401 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | In this note, the off-shell generalized Abbott-Deser-Tekin (ADT) formalism is
applied to explore the mass of Kerr-anti-de Sitter (Kerr-AdS) black holes in
various dimensions within asymptotically rotating frames. The cases in four and
five dimensions are explicitly investigated. It is demonstrated that the
asymptotic... | [
{
"created": "Thu, 6 Jul 2017 01:15:46 GMT",
"version": "v1"
}
] | 2023-05-23 | [
[
"Jing",
"Yi-De",
""
],
[
"Peng",
"Jun-Jin",
""
]
] | In this note, the off-shell generalized Abbott-Deser-Tekin (ADT) formalism is applied to explore the mass of Kerr-anti-de Sitter (Kerr-AdS) black holes in various dimensions within asymptotically rotating frames. The cases in four and five dimensions are explicitly investigated. It is demonstrated that the asymptotical... |
1001.3754 | Llucia Sancho de la Jordana | Llucia Sancho de la Jordana (for the LIGO Scientific Collaboration and
the Virgo Collaboration) | Hierarchical Hough all-sky search for periodic gravitational waves in
LIGO S5 data | 7 pages, 2 figures, Amaldi08 proceedings, submitted to JPCS | J.Phys.Conf.Ser.228:012004,2010 | 10.1088/1742-6596/228/1/012004 | LIGO-P0900212 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a new pipeline used to analyze the data from the fifth science
run (S5) of the LIGO detectors to search for continuous gravitational waves
from isolated spinning neutron stars. The method employed is based on the Hough
transform, which is a semi-coherent, computationally efficient, and robust
pattern reco... | [
{
"created": "Thu, 21 Jan 2010 10:00:21 GMT",
"version": "v1"
}
] | 2019-08-13 | [
[
"de la Jordana",
"Llucia Sancho",
"",
"for the LIGO Scientific Collaboration and\n the Virgo Collaboration"
]
] | We describe a new pipeline used to analyze the data from the fifth science run (S5) of the LIGO detectors to search for continuous gravitational waves from isolated spinning neutron stars. The method employed is based on the Hough transform, which is a semi-coherent, computationally efficient, and robust pattern recogn... |
1411.4368 | Nan Li | Nan Li, Xiao-Long Li, and Shu-Peng Song | Kullback-Leibler entropy and Penrose conjecture in the
Lemaitre-Tolman-Bondi model | 8 pages | Eur. Phys. J. C 75, 114 (2015) | 10.1140/epjc/s10052-015-3334-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Our universe hosts various large-scale structures from voids to galaxy
clusters, so it would be interesting to find some simple and reasonable measure
to describe the inhomogeneities in the universe. We explore two different
methods for this purpose: the Kullback-Leibler entropy and the Weyl curvature
tensor. These t... | [
{
"created": "Mon, 17 Nov 2014 05:46:26 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Mar 2015 11:41:48 GMT",
"version": "v2"
}
] | 2015-03-18 | [
[
"Li",
"Nan",
""
],
[
"Li",
"Xiao-Long",
""
],
[
"Song",
"Shu-Peng",
""
]
] | Our universe hosts various large-scale structures from voids to galaxy clusters, so it would be interesting to find some simple and reasonable measure to describe the inhomogeneities in the universe. We explore two different methods for this purpose: the Kullback-Leibler entropy and the Weyl curvature tensor. These two... |
1011.4334 | Miguel Angel Garcia Aspeitia | Miguel Angel Garc\'ia-Aspeitia | About the Geometric Solution to the Problems of Dark Energy | 4 pages, 1 figure. Second Report | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper is proposed a geometric solution to the dark energy, assuming
that the space can be divided into regions of size $\sim L_{p}$ and energy
$\sim E_{p}$. Significantly this assumption generate a energy density similar
to the energy density observed for the vaccum energy, the correct solution for
the coinci... | [
{
"created": "Fri, 19 Nov 2010 02:39:26 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Feb 2011 01:40:25 GMT",
"version": "v2"
}
] | 2011-02-08 | [
[
"García-Aspeitia",
"Miguel Angel",
""
]
] | In this paper is proposed a geometric solution to the dark energy, assuming that the space can be divided into regions of size $\sim L_{p}$ and energy $\sim E_{p}$. Significantly this assumption generate a energy density similar to the energy density observed for the vaccum energy, the correct solution for the coincide... |
2208.09362 | Wu Bofeng | Bofeng Wu and Chao-Guang Huang | The gravitational field outside a spatially compact stationary source in
a generic fourth-order theory of gravity | 11 pages,accepted by JHEP | null | 10.1007/JHEP02(2023)206 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By applying the symmetric and trace-free formalism in terms of the
irreducible Cartesian tensors, the metric for the external gravitational field
of a spatially compact stationary source is provided in $F(X,Y,Z)$ gravity, a
generic fourth-order theory of gravity, where $X:=R$ is Ricci scalar,
$Y:=R_{\mu\nu}R^{\mu\nu}... | [
{
"created": "Fri, 19 Aug 2022 14:17:55 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Sep 2022 13:33:02 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Feb 2023 01:22:02 GMT",
"version": "v3"
},
{
"created": "Mon, 20 Feb 2023 10:30:18 GMT",
"version": "v4"
},
{
"c... | 2023-11-15 | [
[
"Wu",
"Bofeng",
""
],
[
"Huang",
"Chao-Guang",
""
]
] | By applying the symmetric and trace-free formalism in terms of the irreducible Cartesian tensors, the metric for the external gravitational field of a spatially compact stationary source is provided in $F(X,Y,Z)$ gravity, a generic fourth-order theory of gravity, where $X:=R$ is Ricci scalar, $Y:=R_{\mu\nu}R^{\mu\nu}$ ... |
0801.4297 | Chad Hanna | Chad Hanna, Miguel Megevand, Evan Ochsner, and Carlos Palenzuela | Method to estimate ISCO and ring-down frequencies in binary systems and
consequences for gravitational wave data analysis | Added references to section 3 14 pages 5 figures. Submitted to
Classical and Quantum Gravity | Class.Quant.Grav.26:015009,2009 | 10.1088/0264-9381/26/1/015009 | null | gr-qc | null | Recent advances in the description of compact binary systems have produced
gravitational waveforms that include inspiral, merger and ring-down phases.
Comparing results from numerical simulations with those of post-Newtonian (PN),
and related, expansions has provided motivation for employing PN waveforms in
near merg... | [
{
"created": "Mon, 28 Jan 2008 14:41:56 GMT",
"version": "v1"
},
{
"created": "Tue, 29 Jan 2008 23:48:49 GMT",
"version": "v2"
}
] | 2015-05-13 | [
[
"Hanna",
"Chad",
""
],
[
"Megevand",
"Miguel",
""
],
[
"Ochsner",
"Evan",
""
],
[
"Palenzuela",
"Carlos",
""
]
] | Recent advances in the description of compact binary systems have produced gravitational waveforms that include inspiral, merger and ring-down phases. Comparing results from numerical simulations with those of post-Newtonian (PN), and related, expansions has provided motivation for employing PN waveforms in near merger... |
1211.5985 | Idan Talshir | Idan Talshir | Energy and momentum in multiple metric theories | null | Phys. Rev. D 88, 024050 (2013) | 10.1103/PhysRevD.88.024050 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the expressions for canonical energy, momentum, and angular
momentum for multiple metric theories. We prove that although the metric fields
are generally interacting, the total energy is the sum of conserved energies
corresponding to each metric. A positive energy theorem is given as a result.
In addition, ... | [
{
"created": "Mon, 26 Nov 2012 15:27:28 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Nov 2012 01:00:18 GMT",
"version": "v2"
},
{
"created": "Mon, 9 Sep 2013 09:46:10 GMT",
"version": "v3"
}
] | 2013-09-10 | [
[
"Talshir",
"Idan",
""
]
] | We derive the expressions for canonical energy, momentum, and angular momentum for multiple metric theories. We prove that although the metric fields are generally interacting, the total energy is the sum of conserved energies corresponding to each metric. A positive energy theorem is given as a result. In addition, we... |
1710.06610 | Koray D\"uzta\c{s} | Koray D\"uzta\c{s} | Can test fields destroy the event horizon in the Kerr-Taub-NUT
spacetime? | Revised version | Classical and Quantum Gravity Vol. 35, 045008 (2018) | 10.1088/1361-6382/aaa4e0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we investigate if the interaction of the Kerr-Taub-NUT spacetime
with test scalar and neutrino fields can lead to the destruction of the event
horizon. It turns out that both extremal and nearly extremal black holes can be
destroyed by scalar and neutrino fields if the initial angular momentum of the
spa... | [
{
"created": "Wed, 18 Oct 2017 08:09:49 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Jan 2018 19:42:53 GMT",
"version": "v2"
}
] | 2018-01-23 | [
[
"Düztaş",
"Koray",
""
]
] | In this work we investigate if the interaction of the Kerr-Taub-NUT spacetime with test scalar and neutrino fields can lead to the destruction of the event horizon. It turns out that both extremal and nearly extremal black holes can be destroyed by scalar and neutrino fields if the initial angular momentum of the space... |
2004.10684 | Abhay Ashtekar | Abhay Ashtekar, Alejandro Corichi and Aruna Kesavan | Emergence of classical behavior in the early universe | 43 pages; 3 Figures. Note Added in response to arXiv:2009.09999 as
Section VIII | Phys. Rev. D 102, 023512 (2020) | 10.1103/PhysRevD.102.023512 | null | gr-qc astro-ph.CO hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate three issues that have been discussed in the context of
inflation: Fading of the importance of quantum non-commutativity; the
phenomenon of quantum squeezing; and the ability to approximate the quantum
state by a distribution function on the classical phase space. In the standard
treatments, these feat... | [
{
"created": "Wed, 22 Apr 2020 16:38:25 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jun 2020 15:26:05 GMT",
"version": "v2"
},
{
"created": "Thu, 12 Nov 2020 15:32:44 GMT",
"version": "v3"
}
] | 2020-11-13 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Corichi",
"Alejandro",
""
],
[
"Kesavan",
"Aruna",
""
]
] | We investigate three issues that have been discussed in the context of inflation: Fading of the importance of quantum non-commutativity; the phenomenon of quantum squeezing; and the ability to approximate the quantum state by a distribution function on the classical phase space. In the standard treatments, these featur... |
1101.1364 | Cosimo Bambi | Cosimo Bambi | Spinning super-massive objects in galactic nuclei up to $a_* > 1$ | 5 pages, 2 figures. v2: refereed version | Europhys.Lett.94:50002,2011 | 10.1209/0295-5075/94/50002 | IPMU11-0002 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nowadays we believe that a typical galaxy contains about $10^7$ stellar-mass
black holes and a single super-massive black hole at its center. According to
general relativity, these objects are characterized solely by their mass $M$
and by their spin parameter $a_*$. A fundamental limit for a black hole in
general rel... | [
{
"created": "Fri, 7 Jan 2011 07:09:07 GMT",
"version": "v1"
},
{
"created": "Sat, 21 May 2011 00:05:13 GMT",
"version": "v2"
}
] | 2011-05-24 | [
[
"Bambi",
"Cosimo",
""
]
] | Nowadays we believe that a typical galaxy contains about $10^7$ stellar-mass black holes and a single super-massive black hole at its center. According to general relativity, these objects are characterized solely by their mass $M$ and by their spin parameter $a_*$. A fundamental limit for a black hole in general relat... |
1809.00124 | Ken-Ichi Nakao | Ken-ichi Nakao, Chul-Moon Yoo and Tomohiro Harada | On gravastar formation: What can be the evidence of a black hole? | 44 pages, 17 figures. The discussion on when the gravastar formation
starts has been revised in the 4th paragraph of Sec.V | Phys. Rev. D 99, 044027 (2019) | 10.1103/PhysRevD.99.044027 | OCU-PHYS-485, AP-GR-149, RUP-18-28 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Any observer outside black holes cannot detect any physical signal produced
by the black holes themselves, since, by definition, the black holes are not
located in the causal past of the outside observer. In fact, what we regard as
black hole candidates in our view are not black holes but will be
gravitationally cont... | [
{
"created": "Sat, 1 Sep 2018 06:38:56 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Oct 2018 04:21:47 GMT",
"version": "v2"
}
] | 2019-02-20 | [
[
"Nakao",
"Ken-ichi",
""
],
[
"Yoo",
"Chul-Moon",
""
],
[
"Harada",
"Tomohiro",
""
]
] | Any observer outside black holes cannot detect any physical signal produced by the black holes themselves, since, by definition, the black holes are not located in the causal past of the outside observer. In fact, what we regard as black hole candidates in our view are not black holes but will be gravitationally contra... |
gr-qc/0005123 | Vladimir Dzhunushaliev | V. Dzhunushaliev, D. Singleton | Non-differentiable Degrees of Freedom : Fluctuating Metric Signature | unessential changes | Class.Quant.Grav. 18 (2001) 1787-1798 | 10.1088/0264-9381/18/9/312 | null | gr-qc hep-th quant-ph | null | In this article we investigate the metric signature as a non-differentiable
({\it i.e.} discrete as opposed to continuous) degree of freedom. The specific
model is a vacuum 7D Universe on the principal bundle with an SU(2) structural
group. An analytical solution is found which to a 4D observer appears as a flat
Univ... | [
{
"created": "Mon, 29 May 2000 06:46:56 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Feb 2001 02:45:24 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Dzhunushaliev",
"V.",
""
],
[
"Singleton",
"D.",
""
]
] | In this article we investigate the metric signature as a non-differentiable ({\it i.e.} discrete as opposed to continuous) degree of freedom. The specific model is a vacuum 7D Universe on the principal bundle with an SU(2) structural group. An analytical solution is found which to a 4D observer appears as a flat Univer... |
2408.01140 | Martin Kr\v{s}\v{s}\'ak | Martin Kr\v{s}\v{s}\'ak | Self-Excited Gravitational Instantons | null | null | null | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We present a novel approach to constructing gravitational instantons based on
the observation that the gravitational action of general relativity in its
teleparallel formulation can be expressed as a product of torsion and
excitation forms. We introduce a new class of solutions where these two forms
are equal, which ... | [
{
"created": "Fri, 2 Aug 2024 09:36:05 GMT",
"version": "v1"
}
] | 2024-08-05 | [
[
"Krššák",
"Martin",
""
]
] | We present a novel approach to constructing gravitational instantons based on the observation that the gravitational action of general relativity in its teleparallel formulation can be expressed as a product of torsion and excitation forms. We introduce a new class of solutions where these two forms are equal, which we... |
0904.4367 | Mark Durkee | Mark Durkee | Type II Einstein spacetimes in higher dimensions | 10 pages. v2: Various minor corrections and clarifications. Accepted
by Class. Quantum Grav | Class.Quant.Grav.26:195010,2009 | 10.1088/0264-9381/26/19/195010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This short note shows that many of the results derived by Pravda et al
(Class. Quant. Grav. 24 4407-4428) for higher-dimensional Type D Einstein
spacetimes can be generalized to all Einstein spacetimes admitting a multiple
WAND; the main new result being the extension to include the Type II case.
Examples of Type D E... | [
{
"created": "Tue, 28 Apr 2009 14:51:34 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Sep 2009 11:32:57 GMT",
"version": "v2"
}
] | 2009-10-02 | [
[
"Durkee",
"Mark",
""
]
] | This short note shows that many of the results derived by Pravda et al (Class. Quant. Grav. 24 4407-4428) for higher-dimensional Type D Einstein spacetimes can be generalized to all Einstein spacetimes admitting a multiple WAND; the main new result being the extension to include the Type II case. Examples of Type D Ein... |
1004.1777 | Chih-Hung Wang | Yu-Huei Wu, Chih-Hung Wang | A momentum-space representation of Feynman propagator in Riemann-Cartan
spacetime | 12 pages | Phys.Rev.D82:064007,2010 | 10.1103/PhysRevD.82.064007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We first construct generalized Riemann-normal coordinates by using
autoparallels, instead of geodesics, in an arbitrary Riemann-Cartan spacetime.
With the aid of generalized Riemann-normal coordinates and their associated
orthonormal frames, we obtain a momentum-space representation of the Feynman
propagator for scal... | [
{
"created": "Sun, 11 Apr 2010 09:09:10 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Wu",
"Yu-Huei",
""
],
[
"Wang",
"Chih-Hung",
""
]
] | We first construct generalized Riemann-normal coordinates by using autoparallels, instead of geodesics, in an arbitrary Riemann-Cartan spacetime. With the aid of generalized Riemann-normal coordinates and their associated orthonormal frames, we obtain a momentum-space representation of the Feynman propagator for scalar... |
1405.2146 | Paul Camp | Paul J. Camp and John L. Safko | The Quantization Conditions in Curved Spacetime and Uncertainty Driven
Inflation | This is an old paper but I resurrect it now because it made the
interesting prediction of a small residual positive cosmological constant.
That may make it worth recalling | International Journal of Theoretical Physics, 2000, Volume 39,
Issue 6 , pp 1643-1668 | 10.1023/A:1003692530074 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An alternative inflationary model is proposed predicated upon a consideration
of the form of the uncertainty principle in a curved background spacetime. An
argument is presented suggesting a possible curvature dependence in the correct
commutator relations for a quantum field in a classical background which cannot
be... | [
{
"created": "Fri, 9 May 2014 06:04:17 GMT",
"version": "v1"
}
] | 2014-05-12 | [
[
"Camp",
"Paul J.",
""
],
[
"Safko",
"John L.",
""
]
] | An alternative inflationary model is proposed predicated upon a consideration of the form of the uncertainty principle in a curved background spacetime. An argument is presented suggesting a possible curvature dependence in the correct commutator relations for a quantum field in a classical background which cannot be d... |
gr-qc/9906043 | Andrzej Borowiec | Andrzej Borowiec | Nonlinear Lagrangians of the Ricci type | 8 pages in LaTeX, to appear in Reports on Mathematical Physics | null | null | null | gr-qc math-ph math.MP | null | The Euler-Lagrange equations for some class of gravitational actions are
calculated by means of Palatini principle. Polynomial structures with Einstein
metrics appear among extremals of this variational problem.
| [
{
"created": "Sun, 13 Jun 1999 16:37:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Borowiec",
"Andrzej",
""
]
] | The Euler-Lagrange equations for some class of gravitational actions are calculated by means of Palatini principle. Polynomial structures with Einstein metrics appear among extremals of this variational problem. |
1403.7743 | Marcelo Schiffer | M. Schiffer | Does the Cosmological Expansion Change Local Dynamics? | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well a known fact that the Newtonian description of dynamics within
Galaxies for its known matter content is in disagreement with the observations
as the acceleration approaches $a_0 \approx 1.2 \times 10^{-10}m/s^2$ (slighter
larger for clusters). Both the Dark Matter scenario and Modified Gravity
Theories (MG... | [
{
"created": "Sun, 30 Mar 2014 12:03:41 GMT",
"version": "v1"
}
] | 2014-04-01 | [
[
"Schiffer",
"M.",
""
]
] | It is well a known fact that the Newtonian description of dynamics within Galaxies for its known matter content is in disagreement with the observations as the acceleration approaches $a_0 \approx 1.2 \times 10^{-10}m/s^2$ (slighter larger for clusters). Both the Dark Matter scenario and Modified Gravity Theories (MGT)... |
2112.01883 | Baocheng Zhang | Yue Li, Yongjie Pan, and Baocheng Zhang | Change of quantum correlation for two simultaneously accelerated
observers | null | J. Phys.: Conf. Ser. 1707 012004 (2020) | 10.1088/1742-6596/1707/1/012004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The influence of Unruh effect on the quantum and classical correlation of a
quantum entangled state is investigated, when one or two of the observers are
accelerated. It is found that the quantum and classical correlation would
approach to a finite value with the increase of the acceleration when only one
observer is... | [
{
"created": "Fri, 3 Dec 2021 12:48:23 GMT",
"version": "v1"
}
] | 2021-12-06 | [
[
"Li",
"Yue",
""
],
[
"Pan",
"Yongjie",
""
],
[
"Zhang",
"Baocheng",
""
]
] | The influence of Unruh effect on the quantum and classical correlation of a quantum entangled state is investigated, when one or two of the observers are accelerated. It is found that the quantum and classical correlation would approach to a finite value with the increase of the acceleration when only one observer is a... |
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