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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2006.04618 | Joseph P Johnson | Joseph P Johnson and S. Shankaranarayanan | Cosmological perturbations in the interacting dark sector: Mapping
fields and fluids | 31 pages, 3 table, 8 figures | Phys. Rev. D 103, 023510 (2021) | 10.1103/PhysRevD.103.023510 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is no unique way to describe the dark energy-dark matter interaction,
as we have little information about the nature and dynamics of the dark sector.
Hence, in many of the phenomenological dark matter fluid interaction models in
the literature, the interaction strength $Q_{\nu}$ in the dark sector is
introduced... | [
{
"created": "Fri, 5 Jun 2020 17:14:50 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Dec 2020 17:45:57 GMT",
"version": "v2"
}
] | 2021-01-13 | [
[
"Johnson",
"Joseph P",
""
],
[
"Shankaranarayanan",
"S.",
""
]
] | There is no unique way to describe the dark energy-dark matter interaction, as we have little information about the nature and dynamics of the dark sector. Hence, in many of the phenomenological dark matter fluid interaction models in the literature, the interaction strength $Q_{\nu}$ in the dark sector is introduced b... |
2202.00696 | V\'ictor Jaramillo | V\'ictor Jaramillo, Nicolas Sanchis-Gual, Juan Barranco, Argelia
Bernal, Juan Carlos Degollado, Carlos Herdeiro, Miguel Megevand, Dar\'io
N\'u\~nez | Head-on collisions of $\ell$-boson stars | 23 pages. Updated version with broader discussion, typos corrected
and new analyses and figures | null | 10.1103/PhysRevD.105.104057 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Fully non-linear numerical evolutions of the Einstein-(multi)--Klein-Gordon
equations are performed to study head-on collisions of $\ell$-boson stars.
Despite being spherically symmetric, $\ell$-boson stars have a (hidden) frame
of reference, used in defining their individual multipolar fields. To assess
the impact o... | [
{
"created": "Tue, 1 Feb 2022 19:00:03 GMT",
"version": "v1"
},
{
"created": "Fri, 13 May 2022 16:41:46 GMT",
"version": "v2"
}
] | 2022-06-08 | [
[
"Jaramillo",
"Víctor",
""
],
[
"Sanchis-Gual",
"Nicolas",
""
],
[
"Barranco",
"Juan",
""
],
[
"Bernal",
"Argelia",
""
],
[
"Degollado",
"Juan Carlos",
""
],
[
"Herdeiro",
"Carlos",
""
],
[
"Megevand",
"Miguel",... | Fully non-linear numerical evolutions of the Einstein-(multi)--Klein-Gordon equations are performed to study head-on collisions of $\ell$-boson stars. Despite being spherically symmetric, $\ell$-boson stars have a (hidden) frame of reference, used in defining their individual multipolar fields. To assess the impact of ... |
gr-qc/0302093 | Steven D. Penn | Steven D. Penn, Peter H. Sneddon, Helena Armandula, Joseph C.
Betzwieser, Gianpietro Cagnoli, Jordan Camp, D. R. M. Crooks, Martin M.
Fejer, Andri M. Gretarsson, Gregory M. Harry, Jim Hough, Scott E.
Kittelberger, Michael J. Mortonson, Roger Route, Sheila Rowan, Christophoros
C. Vassiliou | Mechanical Loss in Tantala/Silica Dielectric Mirror Coatings | 8 pages, 6 figures, two figures are color | Class.Quant.Grav. 20 (2003) 2917-2928 | 10.1088/0264-9381/20/13/334 | null | gr-qc | null | Current interferometric gravitational wave detectors use test masses with
mirror coatings formed from multiple layers of dielectric materials, most
commonly alternating layers of SiO2 (silica) and Ta2O5 (tantala). However,
mechanical loss in the Ta2O5/SiO2 coatings may limit the design sensitivity for
advanced detect... | [
{
"created": "Mon, 24 Feb 2003 17:12:09 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Penn",
"Steven D.",
""
],
[
"Sneddon",
"Peter H.",
""
],
[
"Armandula",
"Helena",
""
],
[
"Betzwieser",
"Joseph C.",
""
],
[
"Cagnoli",
"Gianpietro",
""
],
[
"Camp",
"Jordan",
""
],
[
"Crooks",
"D. R. M.",
... | Current interferometric gravitational wave detectors use test masses with mirror coatings formed from multiple layers of dielectric materials, most commonly alternating layers of SiO2 (silica) and Ta2O5 (tantala). However, mechanical loss in the Ta2O5/SiO2 coatings may limit the design sensitivity for advanced detector... |
0707.1671 | Sergey Kozyrev | S.M.Kozyrev | Comment about the "Gravity coupled to a scalar field in extra
dimensions" paper | null | null | null | null | gr-qc | null | Wehus and Ravndal have argued that in d + 1 dimensions the general solution
for gravity minimally coupled to a scalar field can not be explicitly written
in Schwarzschild coordinates. We contest these objections.
| [
{
"created": "Wed, 11 Jul 2007 17:42:15 GMT",
"version": "v1"
}
] | 2007-07-12 | [
[
"Kozyrev",
"S. M.",
""
]
] | Wehus and Ravndal have argued that in d + 1 dimensions the general solution for gravity minimally coupled to a scalar field can not be explicitly written in Schwarzschild coordinates. We contest these objections. |
1204.0419 | Simen Braeck | S. Braeck, O. Gron | A river model of space | 22 pages, 5 figures | Eur. Phys. J. Plus (2013) 128: 24 | 10.1140/epjp/i2013-13024-2 | null | gr-qc astro-ph.CO astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the theory of general relativity gravitational phenomena are usually
attributed to the curvature of four-dimensional spacetime. In this context we
are often confronted with the question of how the concept of ordinary physical
three-dimensional space fits into this picture. In this work we present a
simple and ... | [
{
"created": "Mon, 2 Apr 2012 14:31:03 GMT",
"version": "v1"
}
] | 2017-05-15 | [
[
"Braeck",
"S.",
""
],
[
"Gron",
"O.",
""
]
] | Within the theory of general relativity gravitational phenomena are usually attributed to the curvature of four-dimensional spacetime. In this context we are often confronted with the question of how the concept of ordinary physical three-dimensional space fits into this picture. In this work we present a simple and in... |
2310.16357 | Andronikos Paliathanasis | Andronikos Paliathanasis | The Brans-Dicke field in Non-metricity gravity: Cosmological solutions
and Conformal transformations | 25 pages, 1 figure | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We consider the Brans-Dicke theory in non-metricity gravity, which belongs to
the family of symmetric teleparallel scalar-tensor theories. Our focus lies in
exploring the implications of the conformal transformation, as we derive the
conformal equivalent theory in the Einstein frame, distinct from the minimally
coupl... | [
{
"created": "Wed, 25 Oct 2023 04:37:00 GMT",
"version": "v1"
}
] | 2023-10-26 | [
[
"Paliathanasis",
"Andronikos",
""
]
] | We consider the Brans-Dicke theory in non-metricity gravity, which belongs to the family of symmetric teleparallel scalar-tensor theories. Our focus lies in exploring the implications of the conformal transformation, as we derive the conformal equivalent theory in the Einstein frame, distinct from the minimally coupled... |
2406.17643 | Cameron Bunney | Cameron R. D. Bunney and Jorma Louko | Circular motion in (anti-)de Sitter spacetime: thermality versus finite
size | 18 pages: 10 pages + 8 pages appendices. 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Anti-de Sitter spacetime and the static patch of de Sitter spacetime are
arenas for investigating thermal and finite-size effects seen by an accelerated
quantum observer. We consider an Unruh-DeWitt detector in uniform circular
motion coupled to a conformal scalar field in $(2+1)$-dimensional de Sitter and
anti-de Si... | [
{
"created": "Tue, 25 Jun 2024 15:34:19 GMT",
"version": "v1"
}
] | 2024-06-26 | [
[
"Bunney",
"Cameron R. D.",
""
],
[
"Louko",
"Jorma",
""
]
] | Anti-de Sitter spacetime and the static patch of de Sitter spacetime are arenas for investigating thermal and finite-size effects seen by an accelerated quantum observer. We consider an Unruh-DeWitt detector in uniform circular motion coupled to a conformal scalar field in $(2+1)$-dimensional de Sitter and anti-de Sitt... |
0711.2441 | A. Joel Saavedra | Sergio del Campo, Ramon Herrera and Joel Saavedra | Open Inflationary Universes in Gauss-Bonnet Brane Cosmology | Revtex, 4 Figures. Accepted by Modern Physics Letters A | Mod.Phys.Lett.A23:1187-1197,2008 | 10.1142/S0217732308025784 | null | gr-qc hep-th | null | In this article, we study a type of one-field approach for open inflationary
universe scenario in the context of braneworld models with a Gauss-Bonnet
correction term. For a one-bubble universe model, we determine and characterize
the existence of the Coleman-De Lucia instanton together with the period of
inflation a... | [
{
"created": "Thu, 15 Nov 2007 15:30:13 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"del Campo",
"Sergio",
""
],
[
"Herrera",
"Ramon",
""
],
[
"Saavedra",
"Joel",
""
]
] | In this article, we study a type of one-field approach for open inflationary universe scenario in the context of braneworld models with a Gauss-Bonnet correction term. For a one-bubble universe model, we determine and characterize the existence of the Coleman-De Lucia instanton together with the period of inflation aft... |
2207.07414 | Zhixiang Ren | Tianyu Zhao, Ruoxi Lyu, He Wang, Zhoujian Cao, Zhixiang Ren | Space-based gravitational wave signal detection and extraction with deep
neural network | 19 pages, 7 figures | Commun Phys 6, 212 (2023) | 10.1038/s42005-023-01334-6 | null | gr-qc cs.AI | http://creativecommons.org/licenses/by/4.0/ | Space-based gravitational wave (GW) detectors will be able to observe signals
from sources that are otherwise nearly impossible from current ground-based
detection. Consequently, the well established signal detection method, matched
filtering, will require a complex template bank, leading to a computational
cost that... | [
{
"created": "Fri, 15 Jul 2022 11:48:15 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2022 06:28:05 GMT",
"version": "v2"
},
{
"created": "Wed, 16 Aug 2023 02:17:48 GMT",
"version": "v3"
}
] | 2023-08-17 | [
[
"Zhao",
"Tianyu",
""
],
[
"Lyu",
"Ruoxi",
""
],
[
"Wang",
"He",
""
],
[
"Cao",
"Zhoujian",
""
],
[
"Ren",
"Zhixiang",
""
]
] | Space-based gravitational wave (GW) detectors will be able to observe signals from sources that are otherwise nearly impossible from current ground-based detection. Consequently, the well established signal detection method, matched filtering, will require a complex template bank, leading to a computational cost that i... |
0807.0112 | Luke Butcher | Luke M. Butcher, Anthony Lasenby, Michael Hobson | The physical significance of the Babak-Grishchuk gravitational
energy-momentum tensor | 10 pages. Submitted to Phys. Rev. D; acknowledgements adjusted | Phys.Rev.D78:064034,2008 | 10.1103/PhysRevD.78.064034 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the claim of Babak and Grishchuk [1] to have solved the problem of
localising the energy and momentum of the gravitational field. After
summarising Grishchuk's flat-space formulation of gravity, we demonstrate its
equivalence to General Relativity at the level of the action. Two important
transformations a... | [
{
"created": "Tue, 1 Jul 2008 11:03:34 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Jul 2008 14:37:15 GMT",
"version": "v2"
}
] | 2009-02-23 | [
[
"Butcher",
"Luke M.",
""
],
[
"Lasenby",
"Anthony",
""
],
[
"Hobson",
"Michael",
""
]
] | We examine the claim of Babak and Grishchuk [1] to have solved the problem of localising the energy and momentum of the gravitational field. After summarising Grishchuk's flat-space formulation of gravity, we demonstrate its equivalence to General Relativity at the level of the action. Two important transformations are... |
1306.4964 | Jansen Formiga | J. B. Formiga | Equivalent teleparallel theories in diagonalizable spacetimes: Comment
on "Metric-affine approach to teleparallel gravity" | 7 pages | null | 10.1103/PhysRevD.88.068501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is well known that the teleparallel equivalent of general relativity
yields the same vacuum solutions as general relativity does, which ensures that
this particular teleparallel model is in good agreement with experiments. A
less known result concerns the existence of a wider class of teleparallel
models which als... | [
{
"created": "Thu, 20 Jun 2013 19:31:42 GMT",
"version": "v1"
}
] | 2013-10-02 | [
[
"Formiga",
"J. B.",
""
]
] | It is well known that the teleparallel equivalent of general relativity yields the same vacuum solutions as general relativity does, which ensures that this particular teleparallel model is in good agreement with experiments. A less known result concerns the existence of a wider class of teleparallel models which also ... |
2401.10771 | Avisikta Ghosh | Avisikta Ghosh | Study of Orbital Dynamics in Singular and Regular Naked Singularity
Space-times | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The universe is filled with various compact objects and the most attractive
of them are the black holes and singularity. But it is also known that at the
singularity density becomes so infinitely high that the present physics
knowledge breaks down. Thus, the singularity remains a flaw of the present
theories. Several... | [
{
"created": "Fri, 19 Jan 2024 15:42:07 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Apr 2024 07:46:16 GMT",
"version": "v2"
}
] | 2024-04-04 | [
[
"Ghosh",
"Avisikta",
""
]
] | The universe is filled with various compact objects and the most attractive of them are the black holes and singularity. But it is also known that at the singularity density becomes so infinitely high that the present physics knowledge breaks down. Thus, the singularity remains a flaw of the present theories. Several m... |
1412.7208 | Otakar Svitek | Petr Kaspar, Otakar Svitek | Averaging in LRS class II spacetimes | 3 figures, accepted in GRG | Gen. Rel. Grav. 47 (2015) 4 | 10.1007/s10714-014-1844-6 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | We generalize Buchert's averaged equations [Gen. Rel. Grav. 32, 105 (2000);
Gen. Rel. Grav. 33, 1381 (2001)] to LRS class II dust model in the sense that
all Einstein equations are averaged, not only the trace part. We derive the
relevant averaged equations and we investigate backreaction on expansion and
shear scala... | [
{
"created": "Mon, 22 Dec 2014 23:28:32 GMT",
"version": "v1"
}
] | 2015-02-17 | [
[
"Kaspar",
"Petr",
""
],
[
"Svitek",
"Otakar",
""
]
] | We generalize Buchert's averaged equations [Gen. Rel. Grav. 32, 105 (2000); Gen. Rel. Grav. 33, 1381 (2001)] to LRS class II dust model in the sense that all Einstein equations are averaged, not only the trace part. We derive the relevant averaged equations and we investigate backreaction on expansion and shear scalars... |
gr-qc/0202096 | Harald P. Pfeiffer | Harald P. Pfeiffer, Lawrence E. Kidder, Mark A. Scheel, Saul A.
Teukolsky | A multidomain spectral method for solving elliptic equations | 31 pages, 8 figures | Comput.Phys.Commun. 152 (2003) 253-273 | 10.1016/S0010-4655(02)00847-0 | null | gr-qc | null | We present a new solver for coupled nonlinear elliptic partial differential
equations (PDEs). The solver is based on pseudo-spectral collocation with
domain decomposition and can handle one- to three-dimensional problems. It has
three distinct features. First, the combined problem of solving the PDE,
satisfying the b... | [
{
"created": "Wed, 27 Feb 2002 14:59:18 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Pfeiffer",
"Harald P.",
""
],
[
"Kidder",
"Lawrence E.",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Teukolsky",
"Saul A.",
""
]
] | We present a new solver for coupled nonlinear elliptic partial differential equations (PDEs). The solver is based on pseudo-spectral collocation with domain decomposition and can handle one- to three-dimensional problems. It has three distinct features. First, the combined problem of solving the PDE, satisfying the bou... |
1807.10287 | Naritaka Oshita | Naritaka Oshita and Niayesh Afshordi | Probing microstructure of black hole spacetimes with gravitational wave
echoes | 9 pages, 7 figures, accepted for publication in PRD | Phys. Rev. D 99, 044002 (2019) | 10.1103/PhysRevD.99.044002 | RESCEU-10/18 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum nature of black hole horizons has been a subject of recent interest
and scrutiny. In particular, a near-horizon quantum violation of the
equivalence principle has been proposed as a resolution of the black hole
information paradox. Such a violation may lead to a modified dispersion
relation at high energies, ... | [
{
"created": "Thu, 26 Jul 2018 18:00:02 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Feb 2019 05:19:09 GMT",
"version": "v2"
}
] | 2019-02-14 | [
[
"Oshita",
"Naritaka",
""
],
[
"Afshordi",
"Niayesh",
""
]
] | Quantum nature of black hole horizons has been a subject of recent interest and scrutiny. In particular, a near-horizon quantum violation of the equivalence principle has been proposed as a resolution of the black hole information paradox. Such a violation may lead to a modified dispersion relation at high energies, wh... |
1412.3657 | Christopher Moore | Christopher J. Moore and Jonathan R. Gair | Novel Method for Incorporating Model Uncertainties into Gravitational
Wave Parameter Estimates | 6 pages, 3 figures, accepted for publication in Physical Review
Letters | null | 10.1103/PhysRevLett.113.251101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Posterior distributions on parameters computed from experimental data using
Bayesian techniques are only as accurate as the models used to construct them.
In many applications these models are incomplete, which both reduces the
prospects of detection and leads to a systematic error in the parameter
estimates. In the ... | [
{
"created": "Thu, 11 Dec 2014 14:32:22 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Moore",
"Christopher J.",
""
],
[
"Gair",
"Jonathan R.",
""
]
] | Posterior distributions on parameters computed from experimental data using Bayesian techniques are only as accurate as the models used to construct them. In many applications these models are incomplete, which both reduces the prospects of detection and leads to a systematic error in the parameter estimates. In the an... |
gr-qc/0302102 | Y. Bisabr | Yousef Bisabr | Mach's Principle and Model for a Broken Symmetric Theory of Gravity | 9 pages, no figures | Int.J.Theor.Phys. 44 (2005) 283-291 | 10.1007/s10773-006-9033-3 | null | gr-qc | null | We investigate spontaneous symmetry breaking in a conformally invariant
gravitational model. In particular, we use a conformally invariant scalar
tensor theory as the vacuum sector of a gravitational model to examine the idea
that gravitational coupling may be the result of a spontaneous symmetry
breaking. In this mo... | [
{
"created": "Tue, 25 Feb 2003 20:05:58 GMT",
"version": "v1"
},
{
"created": "Wed, 31 Mar 2004 20:49:27 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Jul 2004 18:16:48 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Bisabr",
"Yousef",
""
]
] | We investigate spontaneous symmetry breaking in a conformally invariant gravitational model. In particular, we use a conformally invariant scalar tensor theory as the vacuum sector of a gravitational model to examine the idea that gravitational coupling may be the result of a spontaneous symmetry breaking. In this mode... |
2310.17553 | Shaswata Chowdhury | Shaswata Chowdhury | Anisotropies and modified gravity theories in stellar and substellar
objects | This review article prepared for "Special Issue Metric-Affine Gravity
Tartu", 49 pages, 10 figures, 3 tables, version accepted to Int. J. of
Geometric Methods in Modern Physics (IJGMMP) | null | null | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In several classes of modified gravity theories, extra degrees of freedom are
not completely screened in the interiors of stellar and substellar objects. In
such theories, the hydrostatic equilibrium condition inside these objects is
altered. Moreover, the interior structures of these objects might have a small
press... | [
{
"created": "Thu, 26 Oct 2023 16:45:59 GMT",
"version": "v1"
}
] | 2023-10-27 | [
[
"Chowdhury",
"Shaswata",
""
]
] | In several classes of modified gravity theories, extra degrees of freedom are not completely screened in the interiors of stellar and substellar objects. In such theories, the hydrostatic equilibrium condition inside these objects is altered. Moreover, the interior structures of these objects might have a small pressur... |
gr-qc/0607134 | Hunter Monroe | Hunter Monroe | Topology and Closed Timelike Curves II: Causal structure | See companion paper by the same title | null | null | null | gr-qc astro-ph math.DG | null | Because no closed timelike curve (CTC) on a Lorentzian manifold can be
deformed to a point, any such manifold containing a CTC must have a topological
feature, to be called a timelike wormhole, that prevents the CTC from being
deformed to a point. If all wormholes have horizons, which typically seems to
be the case i... | [
{
"created": "Mon, 31 Jul 2006 04:30:09 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Aug 2006 12:17:28 GMT",
"version": "v2"
},
{
"created": "Sun, 3 Sep 2006 03:23:12 GMT",
"version": "v3"
},
{
"created": "Fri, 8 Sep 2006 12:46:39 GMT",
"version": "v4"
},
{
"cre... | 2007-05-23 | [
[
"Monroe",
"Hunter",
""
]
] | Because no closed timelike curve (CTC) on a Lorentzian manifold can be deformed to a point, any such manifold containing a CTC must have a topological feature, to be called a timelike wormhole, that prevents the CTC from being deformed to a point. If all wormholes have horizons, which typically seems to be the case in ... |
1302.5156 | Mir Faizal | Mir Faizal | Noncommutative Quantum Gravity | 11 pages, 0 figures, accepted for publication in Mod. Phys. Lett. A | Mod. Phys. Lett. A28: 1350034, 2013 | 10.1142/S021773231350034X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the BRST and anti-BRST symmetries for perturbative quantum gravity
in noncommutative spacetime. In this noncommutative perturbative quantum
gravity the sum of the classical Lagrangian density with a gauge fixing term
and a ghost term is shown to be invariant the noncommutative BRST and the
noncommutative a... | [
{
"created": "Thu, 21 Feb 2013 01:57:41 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Mar 2013 21:56:40 GMT",
"version": "v2"
}
] | 2015-06-15 | [
[
"Faizal",
"Mir",
""
]
] | We discuss the BRST and anti-BRST symmetries for perturbative quantum gravity in noncommutative spacetime. In this noncommutative perturbative quantum gravity the sum of the classical Lagrangian density with a gauge fixing term and a ghost term is shown to be invariant the noncommutative BRST and the noncommutative ant... |
1403.1865 | Laura Henderson | Laura J. Henderson (1), Robert B. Mann (1) and Sean Stotyn (2) ((1)
Department of Physics and Astronomy, University of Waterloo, (2) Department
of Physics and Astronomy, University of British Columbia) | Gauss-Bonnet Boson Stars with a Single Killing Vector | 46 pages, 17 figures | Phys. Rev. D 91, 024009 (2015) | 10.1103/PhysRevD.91.024009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct asymptotically anti-de Sitter boson stars in
Einstein-Gauss-Bonnet gravity coupled to a $\frac{D-1}{2}$-tuplet of complex
massless scalar fields both perturbatively and numerically in D=5,7,9,11
dimensions. These solutions possess just a single helical Killing symmetry due
to the choice of scalar fields.... | [
{
"created": "Fri, 7 Mar 2014 20:52:14 GMT",
"version": "v1"
},
{
"created": "Tue, 27 May 2014 22:27:17 GMT",
"version": "v2"
}
] | 2015-01-14 | [
[
"Henderson",
"Laura J.",
""
],
[
"Mann",
"Robert B.",
""
],
[
"Stotyn",
"Sean",
""
]
] | We construct asymptotically anti-de Sitter boson stars in Einstein-Gauss-Bonnet gravity coupled to a $\frac{D-1}{2}$-tuplet of complex massless scalar fields both perturbatively and numerically in D=5,7,9,11 dimensions. These solutions possess just a single helical Killing symmetry due to the choice of scalar fields. T... |
gr-qc/0606105 | Sergio Dain | Sergio Dain | Proof of the angular momentum-mass inequality for axisymmetric black
holes | The statement before Eq. (17) in page 5 in the previous version is
incorrect. This mistake is corrected in the new version | J.Diff.Geom.79:33-67,2008 | null | null | gr-qc math-ph math.DG math.MP | null | We prove that extreme Kerr initial data set is a unique absolute minimum of
the total mass in a (physically relevant) class of vacuum, maximal,
asymptotically flat, axisymmetric data for Einstein equations with fixed
angular momentum. These data represent non-stationary, axially symmetric, black
holes. As a consequen... | [
{
"created": "Fri, 23 Jun 2006 16:58:15 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Dec 2006 17:48:42 GMT",
"version": "v2"
},
{
"created": "Tue, 8 May 2007 19:25:39 GMT",
"version": "v3"
}
] | 2008-12-18 | [
[
"Dain",
"Sergio",
""
]
] | We prove that extreme Kerr initial data set is a unique absolute minimum of the total mass in a (physically relevant) class of vacuum, maximal, asymptotically flat, axisymmetric data for Einstein equations with fixed angular momentum. These data represent non-stationary, axially symmetric, black holes. As a consequence... |
1405.7363 | Nikolaos Batakis Professor | Nikolaos A. Batakis | First exact Geon found is a non-singular monopole, propagating as a
primordial gravitational pp-wave | 13 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Geons are particle-like electrovacua. The concept is well-defined, but it
still lacks a proper first example. Emerging as such is a self-confined exact
2-parameter pp-wave non-Dirac monopole {\cal G} with primordial Q/r^2 (r\geq
r_o) field plus higher moments. {\cal G} has effective mass,
independently-scaled NUT-lik... | [
{
"created": "Wed, 28 May 2014 18:04:08 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Jul 2014 08:22:35 GMT",
"version": "v2"
}
] | 2014-07-11 | [
[
"Batakis",
"Nikolaos A.",
""
]
] | Geons are particle-like electrovacua. The concept is well-defined, but it still lacks a proper first example. Emerging as such is a self-confined exact 2-parameter pp-wave non-Dirac monopole {\cal G} with primordial Q/r^2 (r\geq r_o) field plus higher moments. {\cal G} has effective mass, independently-scaled NUT-like ... |
gr-qc/0103037 | Albert Roura | Esteban Calzetta, Albert Roura and Enric Verdaguer | Master equation for quantum Brownian motion derived by stochastic
methods | 10 pages, RevTeX. To appear in the proceedings of the 5th Peyresq
meeting | Int.J.Theor.Phys.40:2317,2001 | 10.1023/A:1012946523088 | null | gr-qc | null | The master equation for a linear open quantum system in a general environment
is derived using a stochastic approach. This is an alternative derivation to
that of Hu, Paz and Zhang, which was based on the direct computation of path
integrals, or to that of Halliwell and Yu, based on the evolution of the Wigner
functi... | [
{
"created": "Mon, 12 Mar 2001 17:15:08 GMT",
"version": "v1"
}
] | 2011-08-04 | [
[
"Calzetta",
"Esteban",
""
],
[
"Roura",
"Albert",
""
],
[
"Verdaguer",
"Enric",
""
]
] | The master equation for a linear open quantum system in a general environment is derived using a stochastic approach. This is an alternative derivation to that of Hu, Paz and Zhang, which was based on the direct computation of path integrals, or to that of Halliwell and Yu, based on the evolution of the Wigner function... |
1108.4582 | Diana Kaminski | Diana Kaminski | AQV VI. A holonomy groupoid formulation | 27 pages, 1 figure | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The philosophy of the Loop Quantum Gravity approach is to construct the
canonical variables by using the duality of infinitesimal connections and
holonomies along loops. Based on this fundamental property for example the
holonomy-flux *-algebra has been formulated. A generalisation of the one-to-one
correspondence be... | [
{
"created": "Fri, 19 Aug 2011 16:53:51 GMT",
"version": "v1"
}
] | 2011-08-24 | [
[
"Kaminski",
"Diana",
""
]
] | The philosophy of the Loop Quantum Gravity approach is to construct the canonical variables by using the duality of infinitesimal connections and holonomies along loops. Based on this fundamental property for example the holonomy-flux *-algebra has been formulated. A generalisation of the one-to-one correspondence betw... |
2003.00764 | Reggie Pantig | Reggie C. Pantig, Emmanuel T. Rodulfo | Weak deflection angle of a dirty black hole | 6 pages, 1 figure; expressions in section 4 simplified thoroughly;
accepted for publication in Chinese Journal of Physics | Chin. J. Phys. (2020) 66; 691-702 | 10.1016/j.cjph.2020.06.015 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we present the weak deflection angle in a Schwarzschild black
hole of mass $m$ surrounded by the dark matter of mass $M$ and thickness
$\Delta r_{s}$. The Gauss-Bonnet theorem, formulated for asymptotic spacetimes,
is found to be ill-behaved in the third-order of $1/\Delta r_{s}$ for very
large $\Delta... | [
{
"created": "Mon, 2 Mar 2020 11:10:22 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Mar 2020 07:31:56 GMT",
"version": "v2"
},
{
"created": "Sun, 19 Jul 2020 02:55:01 GMT",
"version": "v3"
}
] | 2020-07-21 | [
[
"Pantig",
"Reggie C.",
""
],
[
"Rodulfo",
"Emmanuel T.",
""
]
] | In this paper, we present the weak deflection angle in a Schwarzschild black hole of mass $m$ surrounded by the dark matter of mass $M$ and thickness $\Delta r_{s}$. The Gauss-Bonnet theorem, formulated for asymptotic spacetimes, is found to be ill-behaved in the third-order of $1/\Delta r_{s}$ for very large $\Delta r... |
gr-qc/9603003 | B. Linet | B. Boisseau, C. Charmousis and B. Linet | Electrostatic self-force in a static weak gravitational field with
cylindrical symmetry | 11 pages, no figure, latex | Class. Quant. Grav. 13 (1996) 1797 | 10.1088/0264-9381/13/7/013 | null | gr-qc | null | We determine the electrostatic self-force at rest in an arbitrary static
metric with cylindrical symmetry in the linear approximation in the Newtonian
constant. In linearised Einstein theory, we express it in terms of the
components of the energy-momentum tensor.
| [
{
"created": "Mon, 4 Mar 1996 12:38:08 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Boisseau",
"B.",
""
],
[
"Charmousis",
"C.",
""
],
[
"Linet",
"B.",
""
]
] | We determine the electrostatic self-force at rest in an arbitrary static metric with cylindrical symmetry in the linear approximation in the Newtonian constant. In linearised Einstein theory, we express it in terms of the components of the energy-momentum tensor. |
2111.07329 | Suman Ghosh | Vivek Sharma and Suman Ghosh | Generalised Ellis-Bronnikov wormholes embedded in warped braneworld
background and energy conditions | 19+6 preprint pages | Eur. Phys. J. C (2021) 81:1004 | 10.1140/epjc/s10052-021-09789-z | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Ellis-Bronnikov (EB) wormholes require violation of null energy conditions at
the `throat'. This problem was cured by a simple modification of the `shape
function', which introduces a new parameter $m\ge 2$ ($m=2$ corresponds to the
EB model). This leads to a generalised (GEB) version. In this work, we consider
a mod... | [
{
"created": "Sun, 14 Nov 2021 12:21:08 GMT",
"version": "v1"
}
] | 2021-11-16 | [
[
"Sharma",
"Vivek",
""
],
[
"Ghosh",
"Suman",
""
]
] | Ellis-Bronnikov (EB) wormholes require violation of null energy conditions at the `throat'. This problem was cured by a simple modification of the `shape function', which introduces a new parameter $m\ge 2$ ($m=2$ corresponds to the EB model). This leads to a generalised (GEB) version. In this work, we consider a model... |
2307.09382 | Kuntal Pal | Kunal Pal, Kuntal Pal, and Tapobrata Sarkar | Geodesically completing regular black holes by the Simpson-Visser method | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Regular black holes are often geodesically incomplete when their extensions
to negative values of the radial coordinate are considered. Here, we propose to
use the Simpson-Visser method of regularising a singular spacetime, and apply
it to a regular solution that is geodesically incomplete, to construct a
geodesicall... | [
{
"created": "Tue, 18 Jul 2023 16:02:39 GMT",
"version": "v1"
}
] | 2023-07-19 | [
[
"Pal",
"Kunal",
""
],
[
"Pal",
"Kuntal",
""
],
[
"Sarkar",
"Tapobrata",
""
]
] | Regular black holes are often geodesically incomplete when their extensions to negative values of the radial coordinate are considered. Here, we propose to use the Simpson-Visser method of regularising a singular spacetime, and apply it to a regular solution that is geodesically incomplete, to construct a geodesically ... |
0706.0129 | Szymon {\L}{\ke}ski | Jacek Jezierski, Jerzy Kijowski, Szymon Leski | Energy-minimizing two black holes initial data | Minor corrections, 2 references added | Phys.Rev.D76:024014,2007 | 10.1103/PhysRevD.76.024014 | null | gr-qc | null | An attempt to construct the ``ground state'' vacuum initial data for the
gravitational field surrounding two black holes is presented. The ground state
is defined as the gravitational initial data minimizing the ADM mass within the
class of data for which the masses of the holes and their distance are fixed.
To param... | [
{
"created": "Fri, 1 Jun 2007 11:52:27 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Jul 2007 14:33:22 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Jezierski",
"Jacek",
""
],
[
"Kijowski",
"Jerzy",
""
],
[
"Leski",
"Szymon",
""
]
] | An attempt to construct the ``ground state'' vacuum initial data for the gravitational field surrounding two black holes is presented. The ground state is defined as the gravitational initial data minimizing the ADM mass within the class of data for which the masses of the holes and their distance are fixed. To paramet... |
0904.4551 | Kenta Kiuchi | Kenta Kiuchi, Yuichiro Sekiguchi, Masaru Shibata, Keisuke Taniguchi | Longterm general relativistic simulation of binary neutron stars
collapsing to a black hole | 35 pages, 20 figures, accepted to PRD | Phys.Rev.D80:064037,2009 | 10.1103/PhysRevD.80.064037 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativistic simulations for the merger of binary neutron stars are
performed as an extension of a previous work\cite{Shibata:2006nm}. We prepare
binary neutron stars with a large initial orbital separation and employ the
moving-puncture formulation, which enables to follow merger and ringdown phases
for a lo... | [
{
"created": "Wed, 29 Apr 2009 08:27:50 GMT",
"version": "v1"
},
{
"created": "Mon, 31 Aug 2009 05:53:51 GMT",
"version": "v2"
}
] | 2009-11-06 | [
[
"Kiuchi",
"Kenta",
""
],
[
"Sekiguchi",
"Yuichiro",
""
],
[
"Shibata",
"Masaru",
""
],
[
"Taniguchi",
"Keisuke",
""
]
] | General relativistic simulations for the merger of binary neutron stars are performed as an extension of a previous work\cite{Shibata:2006nm}. We prepare binary neutron stars with a large initial orbital separation and employ the moving-puncture formulation, which enables to follow merger and ringdown phases for a long... |
gr-qc/0211015 | Pavlov | A. A. Grib, Yu. V. Pavlov | Cold dark matter and primordial superheavy particles | LaTeX, 5 pages, no figures | Int.J.Mod.Phys. A17 (2002) 4435-4440 | 10.1142/S0217751X02013514 | null | gr-qc hep-ph | null | The hypothesis that cold dark matter consists of primordial superheavy
particles, the decay of short lifetime component of which led to the observable
mass of matter while long living component survived up to modern times
manifesting its presence in high energetic cosmic rays particles is
investigated.
| [
{
"created": "Tue, 5 Nov 2002 07:23:05 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Grib",
"A. A.",
""
],
[
"Pavlov",
"Yu. V.",
""
]
] | The hypothesis that cold dark matter consists of primordial superheavy particles, the decay of short lifetime component of which led to the observable mass of matter while long living component survived up to modern times manifesting its presence in high energetic cosmic rays particles is investigated. |
2206.04505 | Poulami Dutta Roy | Poulami Dutta Roy, Sayan Kar (IIT Kharagpur) | Generalised Hayward spacetimes: Geometry, matter and scalar quasinormal
modes | 45 pages, 22 figures, 7 tables. Matches published version | null | 10.1103/PhysRevD.106.044028 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Bardeen's 1968 idea of a regular black hole spacetime was revived by Hayward
in 2006 through the construction of a new example of such a geometry. Later it
was realised by Neves and Saa, that a wider, two-parameter class exists, with
Bardeen and Hayward spacetimes as special cases. In this article, we revisit
and gen... | [
{
"created": "Thu, 9 Jun 2022 13:45:13 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Aug 2022 12:21:04 GMT",
"version": "v2"
}
] | 2022-08-15 | [
[
"Roy",
"Poulami Dutta",
"",
"IIT Kharagpur"
],
[
"Kar",
"Sayan",
"",
"IIT Kharagpur"
]
] | Bardeen's 1968 idea of a regular black hole spacetime was revived by Hayward in 2006 through the construction of a new example of such a geometry. Later it was realised by Neves and Saa, that a wider, two-parameter class exists, with Bardeen and Hayward spacetimes as special cases. In this article, we revisit and gener... |
gr-qc/0301029 | Stanislav Alexeyev | M. Pomazanov, V. Kolubasova, S. Alexeyev (Lomonosov Moscow State
University, Moscow, Russia) | The problem of singularities of higher order curvature corrections in
four dimensional string gravity | 11 pages, iop style, changes in motivation and discussion parts | null | null | null | gr-qc | null | The influence of higher order (stringly inspired) curvature corrections to
the classical General Relativity spherically symmetric solution is studied. In
string gravity these curvature corrections have a special form and can provide
a singular contribution to the field equations because they generate higher
derivativ... | [
{
"created": "Wed, 8 Jan 2003 20:11:00 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Jul 2003 13:32:30 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Pomazanov",
"M.",
"",
"Lomonosov Moscow State\n University, Moscow, Russia"
],
[
"Kolubasova",
"V.",
"",
"Lomonosov Moscow State\n University, Moscow, Russia"
],
[
"Alexeyev",
"S.",
"",
"Lomonosov Moscow State\n University, Moscow, Russia"
]
] | The influence of higher order (stringly inspired) curvature corrections to the classical General Relativity spherically symmetric solution is studied. In string gravity these curvature corrections have a special form and can provide a singular contribution to the field equations because they generate higher derivatives... |
1104.3685 | Nikolaos Stergioulas | Nikolaos Stergioulas | An improved method for constructing models of self-gravitating tori
around black holes | 13 pages, 6 figures, accepted for publication in Int. J. Mod. Phys. D | Int.J.Mod.Phys.D20:1251-1263,2011 | 10.1142/S021827181101944X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General-relativistic models of self-gravitating tori around black holes are
constructed with a self-consistent-field method in compactified coordinates.
The numerical code is highly accurate and robust, allowing for the construction
of models that exactly fill their Roche lobe, when a cusp exists. As a first
applicat... | [
{
"created": "Tue, 19 Apr 2011 09:26:41 GMT",
"version": "v1"
}
] | 2015-03-19 | [
[
"Stergioulas",
"Nikolaos",
""
]
] | General-relativistic models of self-gravitating tori around black holes are constructed with a self-consistent-field method in compactified coordinates. The numerical code is highly accurate and robust, allowing for the construction of models that exactly fill their Roche lobe, when a cusp exists. As a first applicatio... |
0909.3214 | David Garfinkle | David Garfinkle | Matters of Gravity, The Newsletter of the Topical Group on Gravitation
of the American Physical Society, Volume 34, Fall 2009 | 20 pages, latex | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | GGR News:
New Matters of Gravity Correspondents, by David Garfinkle
we hear that..., by David Garfinkle
Research Briefs:
Numerical Relativity Studies of Black Hole Kicks, by Pablo Laguna
Conference Reports:
AbhayFest, by Chris Beetle
Eastern Gravity Meeting, by Jeff Winicour
Benasque Workshop on Gravi... | [
{
"created": "Thu, 17 Sep 2009 13:26:59 GMT",
"version": "v1"
}
] | 2016-09-08 | [
[
"Garfinkle",
"David",
""
]
] | GGR News: New Matters of Gravity Correspondents, by David Garfinkle we hear that..., by David Garfinkle Research Briefs: Numerical Relativity Studies of Black Hole Kicks, by Pablo Laguna Conference Reports: AbhayFest, by Chris Beetle Eastern Gravity Meeting, by Jeff Winicour Benasque Workshop on Gravity, by Roberto Emp... |
1809.03307 | Muhammad Sharif | M. Sharif and Aisha Siddiqa | Curvature-Matter Coupling Effects on Axial Gravitational Waves | 17 pages, no figure, to appear in EPJC | Eur. Phys. J. C 78(2018)721 | 10.1140/epjc/s10052-018-6201-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the propagation of axial gravitational waves in
the background of the flat FRW universe in $f(R,T)$ theory. The field equations
are obtained for unperturbed as well as axially perturbed FRW metric. These
field equations are solved simultaneously to obtain the unknown perturbation
paramet... | [
{
"created": "Sat, 1 Sep 2018 02:32:14 GMT",
"version": "v1"
}
] | 2018-09-26 | [
[
"Sharif",
"M.",
""
],
[
"Siddiqa",
"Aisha",
""
]
] | In this paper, we investigate the propagation of axial gravitational waves in the background of the flat FRW universe in $f(R,T)$ theory. The field equations are obtained for unperturbed as well as axially perturbed FRW metric. These field equations are solved simultaneously to obtain the unknown perturbation parameter... |
1001.0241 | Sergei Rubin | S.G. Rubin | On the Origin of Gauge Symmetries and Fundamental Constants | 9 pages, minor corrections | JETP Vol. 109, No. 6, p. 961 (2009) | 10.1134/S1063776109120061 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A statistical mechanism is proposed for symmetrization of an extra space. The
conditions and rate of attainment of a symmetric configuration and, as a
consequence, the appearance of gauge invariance in low-energy physics is
discussed. It is shown that, under some conditions, this situation occurs only
after completio... | [
{
"created": "Fri, 1 Jan 2010 15:52:50 GMT",
"version": "v1"
}
] | 2015-05-14 | [
[
"Rubin",
"S. G.",
""
]
] | A statistical mechanism is proposed for symmetrization of an extra space. The conditions and rate of attainment of a symmetric configuration and, as a consequence, the appearance of gauge invariance in low-energy physics is discussed. It is shown that, under some conditions, this situation occurs only after completion ... |
2005.14061 | Abdulla Al Mamon | Abdulla Al Mamon, Subhajit Saha | Testing Lambert$W$ equation of state with observational Hubble parameter
data | 11 pages, 6 figures | New Astronomy 86, 101567 (2021) | 10.1016/j.newast.2020.101567 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the possibility that the Universe is driven by
a single dark fluid described by a Lambert $W$ equation of state parameter,
$w_{eff}$, which is essentially dependent on two parameters $\vartheta_{1}$ and
$\vartheta_{2}$ which need to be fixed from observations. We obtain the
constraints o... | [
{
"created": "Thu, 28 May 2020 14:53:14 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Jan 2021 07:23:21 GMT",
"version": "v2"
}
] | 2022-02-14 | [
[
"Mamon",
"Abdulla Al",
""
],
[
"Saha",
"Subhajit",
""
]
] | In this paper, we investigate the possibility that the Universe is driven by a single dark fluid described by a Lambert $W$ equation of state parameter, $w_{eff}$, which is essentially dependent on two parameters $\vartheta_{1}$ and $\vartheta_{2}$ which need to be fixed from observations. We obtain the constraints on ... |
gr-qc/0004026 | Dr G. A. Jaroszkiewicz | George Jaroszkiewicz (School of Mathematical Sciences, University of
Nottingham, UK) | Discrete spacetime: classical causality,prediction, retrodiction and the
mathematical arrow of time | 20 pages, 7 eps figures | null | null | null | gr-qc | null | A mathematical definition of classical causality over discrete spacetime
dynamics is formulated. The approach is background free and permits a
definition of causality in a precise way whenever the spacetime dynamics
permits. It gives a natural meaning to the concepts of cosmic time, spacelike
hypersurfaces and timeli... | [
{
"created": "Sat, 8 Apr 2000 21:17:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Jaroszkiewicz",
"George",
"",
"School of Mathematical Sciences, University of\n Nottingham, UK"
]
] | A mathematical definition of classical causality over discrete spacetime dynamics is formulated. The approach is background free and permits a definition of causality in a precise way whenever the spacetime dynamics permits. It gives a natural meaning to the concepts of cosmic time, spacelike hypersurfaces and timelike... |
1808.06502 | Andrea Geralico | Donato Bini, Andrea Geralico | Hyperbolic-like elastic scattering of spinning particles by a
Schwarzschild black hole | 16 pages, 2 figures; published version. arXiv admin note: text
overlap with arXiv:1707.09814 | Gen. Relativ. Gravit. 49, 84 (2017) | 10.1007/s10714-017-2247-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The scattering of spinning test particles by a Schwarzschild black hole is
studied. The motion is described according to the Mathisson-Papapetrou-Dixon
model for extended bodies in a given gravitational background field. The
equatorial plane is taken as the orbital plane, the spin vector being
orthogonal to it with c... | [
{
"created": "Fri, 17 Aug 2018 11:13:48 GMT",
"version": "v1"
}
] | 2018-08-21 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
]
] | The scattering of spinning test particles by a Schwarzschild black hole is studied. The motion is described according to the Mathisson-Papapetrou-Dixon model for extended bodies in a given gravitational background field. The equatorial plane is taken as the orbital plane, the spin vector being orthogonal to it with con... |
1808.04506 | Peng Wang | Peng Wang, Houwen Wu and Haitang Yang | Thermodynamics and Phase Transitions of Nonlinear Electrodynamics Black
Holes in an Extended Phase Space | minor corrections, references added | null | 10.1088/1475-7516/2019/04/052 | CTP-SCU/2018003 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the thermodynamic behavior of nonlinear electrodynamics (NLED)
black holes in an extended phase space, which includes the cosmological
constant $\Lambda=-3/l^{2}$ and dimensionful couplings $a$ in NLED as
thermodynamic variables. For a generic NLED black hole with the charge $Q$, we
find that the Smarr... | [
{
"created": "Tue, 14 Aug 2018 02:11:27 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Aug 2018 06:20:06 GMT",
"version": "v2"
}
] | 2019-05-08 | [
[
"Wang",
"Peng",
""
],
[
"Wu",
"Houwen",
""
],
[
"Yang",
"Haitang",
""
]
] | We investigate the thermodynamic behavior of nonlinear electrodynamics (NLED) black holes in an extended phase space, which includes the cosmological constant $\Lambda=-3/l^{2}$ and dimensionful couplings $a$ in NLED as thermodynamic variables. For a generic NLED black hole with the charge $Q$, we find that the Smarr r... |
1812.07727 | Sebastian Murk | Valentina Baccetti, Sebastian Murk, Daniel R. Terno | Black hole evaporation and semiclassical thin shell collapse | 10 pages, 4 figures. Published version. Fixed typographical error in
eq. 23 | Phys. Rev. D 100, 064054 (2019) | 10.1103/PhysRevD.100.064054 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In case of spherical symmetry, the assumptions of finite-time formation of a
trapped region and regularity of its boundary --- the apparent horizon --- are
sufficient to identify the form of the metric and energy-momentum tensor in its
vicinity. By comparison with the known results for quasistatic evaporation of
blac... | [
{
"created": "Wed, 19 Dec 2018 01:51:40 GMT",
"version": "v1"
},
{
"created": "Fri, 24 May 2019 07:53:40 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Oct 2019 06:40:55 GMT",
"version": "v3"
},
{
"created": "Fri, 10 Jan 2020 05:28:49 GMT",
"version": "v4"
}
] | 2020-01-13 | [
[
"Baccetti",
"Valentina",
""
],
[
"Murk",
"Sebastian",
""
],
[
"Terno",
"Daniel R.",
""
]
] | In case of spherical symmetry, the assumptions of finite-time formation of a trapped region and regularity of its boundary --- the apparent horizon --- are sufficient to identify the form of the metric and energy-momentum tensor in its vicinity. By comparison with the known results for quasistatic evaporation of black ... |
0910.1279 | Huguet Eric | S. Faci, E. Huguet, J. Queva, J. Renaud | Conformally covariant quantization of Maxwell field in de Sitter space | v2 is is the definitive (improved compare to v1) version | Phys.Rev.D80:124005,2009 | 10.1103/PhysRevD.80.124005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we quantize the Maxwell ("massless spin one") de Sitter
field in a conformally invariant gauge. This quantization is invariant under
the SO$_0(2,4)$ group and consequently under the de Sitter group. We obtain a
new de Sitter invariant two-points function which is very simple. Our method
relies on the... | [
{
"created": "Wed, 7 Oct 2009 14:56:43 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Jan 2010 17:18:44 GMT",
"version": "v2"
}
] | 2010-01-11 | [
[
"Faci",
"S.",
""
],
[
"Huguet",
"E.",
""
],
[
"Queva",
"J.",
""
],
[
"Renaud",
"J.",
""
]
] | In this article, we quantize the Maxwell ("massless spin one") de Sitter field in a conformally invariant gauge. This quantization is invariant under the SO$_0(2,4)$ group and consequently under the de Sitter group. We obtain a new de Sitter invariant two-points function which is very simple. Our method relies on the o... |
gr-qc/9911095 | Robert M. Wald | Robert M. Wald and Andreas Zoupas | A General Definition of "Conserved Quantities" in General Relativity and
Other Theories of Gravity | 39 pages, no figures | Phys.Rev. D61 (2000) 084027 | 10.1103/PhysRevD.61.084027 | null | gr-qc hep-th | null | In general relativity, the notion of mass and other conserved quantities at
spatial infinity can be defined in a natural way via the Hamiltonian framework:
Each conserved quantity is associated with an asymptotic symmetry and the value
of the conserved quantity is defined to be the value of the Hamiltonian which
gene... | [
{
"created": "Wed, 24 Nov 1999 21:14:17 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Wald",
"Robert M.",
""
],
[
"Zoupas",
"Andreas",
""
]
] | In general relativity, the notion of mass and other conserved quantities at spatial infinity can be defined in a natural way via the Hamiltonian framework: Each conserved quantity is associated with an asymptotic symmetry and the value of the conserved quantity is defined to be the value of the Hamiltonian which genera... |
0811.3860 | Matteo Luca Ruggiero | Matteo Luca Ruggiero, Lorenzo Iorio | Constraining Post-Newtonian f(R) Gravity in the Solar System | 28 pages, AASTeX macros, Contribution to "The Problems of Modern
Cosmology", special volume on the occasion of Prof. S.D. Odintsov's 50th
birthday. Editor: Prof. P. M. Lavrov, Tomsk State Pedagogical University | The Problems of Modern Cosmology, pages 261-272, Tomsk State
Pedagogical University (2009) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider some models of f(R) gravity that can be used to describe, in a
suitable weak-field limit, the gravitational field of the Sun. Using a
perturbative approach, we focus on the impact that the modifications of the
gravitational field, due to the non-linearity of the gravity Lagrangian, have
on the Solar Syste... | [
{
"created": "Mon, 24 Nov 2008 12:41:50 GMT",
"version": "v1"
}
] | 2009-03-17 | [
[
"Ruggiero",
"Matteo Luca",
""
],
[
"Iorio",
"Lorenzo",
""
]
] | We consider some models of f(R) gravity that can be used to describe, in a suitable weak-field limit, the gravitational field of the Sun. Using a perturbative approach, we focus on the impact that the modifications of the gravitational field, due to the non-linearity of the gravity Lagrangian, have on the Solar System ... |
1408.5487 | Andrea Geralico | Donato Bini, Fernando de Felice, Andrea Geralico | Observer-dependent optical properties of stationary axisymmetric
spacetimes | 14 pages, 2 figures; published version | IJGMMP 11, 1450024 (2014) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The world lines of null particles admit arbitrary parametrizations. In the
presence of a family of observers one may introduce along a null world line an
extension of the so-called Cattaneo's relative standard time parameter (valid
for massive particles) which plays a special role. Another possibility is to
use the c... | [
{
"created": "Sat, 23 Aug 2014 10:40:33 GMT",
"version": "v1"
}
] | 2014-08-26 | [
[
"Bini",
"Donato",
""
],
[
"de Felice",
"Fernando",
""
],
[
"Geralico",
"Andrea",
""
]
] | The world lines of null particles admit arbitrary parametrizations. In the presence of a family of observers one may introduce along a null world line an extension of the so-called Cattaneo's relative standard time parameter (valid for massive particles) which plays a special role. Another possibility is to use the coo... |
gr-qc/9704051 | Dirk Kreimer | E.W.Mielke and D.Kreimer | Chiral Anomaly in Contorted Spacetimes | 17 pages, REVTEX | Gen.Rel.Grav.31:701-712,1999 | 10.1023/A:1026653314045 | MZ-TH/97-18 | gr-qc | null | The Dirac equation in Riemann-Cartan spacetimes with torsion is reconsidered.
As is well-known, only the axial covector torsion $A$, a one-form, couples to
massive Dirac fields. Using diagrammatic techniques, we show that besides the
familiar Riemannian term only the Pontrjagin type four-form $dA\wedge dA$ does
arise... | [
{
"created": "Fri, 18 Apr 1997 11:20:22 GMT",
"version": "v1"
}
] | 2011-04-15 | [
[
"Mielke",
"E. W.",
""
],
[
"Kreimer",
"D.",
""
]
] | The Dirac equation in Riemann-Cartan spacetimes with torsion is reconsidered. As is well-known, only the axial covector torsion $A$, a one-form, couples to massive Dirac fields. Using diagrammatic techniques, we show that besides the familiar Riemannian term only the Pontrjagin type four-form $dA\wedge dA$ does arise a... |
0903.2902 | Kentaro Somiya | Kentaro Somiya and Kazuhiro Yamamoto | Coating thermal noise of a finite-size cylindrical mirror | 13 pages, 4 figures | Phys.Rev.D79:102004,2009 | 10.1103/PhysRevD.79.102004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Thermal noise of a mirror is one of the limiting noise sources in the high
precision measurement such as gravitational-wave detection, and the modeling of
thermal noise has been developed and refined over a decade. In this paper, we
present a derivation of coating thermal noise of a finite-size cylindrical
mirror bas... | [
{
"created": "Tue, 17 Mar 2009 05:23:11 GMT",
"version": "v1"
}
] | 2009-07-30 | [
[
"Somiya",
"Kentaro",
""
],
[
"Yamamoto",
"Kazuhiro",
""
]
] | Thermal noise of a mirror is one of the limiting noise sources in the high precision measurement such as gravitational-wave detection, and the modeling of thermal noise has been developed and refined over a decade. In this paper, we present a derivation of coating thermal noise of a finite-size cylindrical mirror based... |
2104.11529 | Joao Magueijo | Joao Magueijo | Cosmological time and the constants of nature | null | null | 10.1016/j.physletb.2021.136487 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We propose that cosmological time is {\it effectively} the conjugate of the
constants of nature. Different definitions of time arise, with the most
relevant related to the constant controlling the dynamics in each epoch. The
Hamiltonian constraint then becomes a Schrodinger equation. In the connection
representation,... | [
{
"created": "Fri, 23 Apr 2021 10:39:03 GMT",
"version": "v1"
}
] | 2021-06-30 | [
[
"Magueijo",
"Joao",
""
]
] | We propose that cosmological time is {\it effectively} the conjugate of the constants of nature. Different definitions of time arise, with the most relevant related to the constant controlling the dynamics in each epoch. The Hamiltonian constraint then becomes a Schrodinger equation. In the connection representation, i... |
gr-qc/0201049 | Jean-Michel Alimi du Daec | A. Serna (U. Miguel Hernandez, Elche, Spain) J.-M. Alimi (LAEC,
Observatoire de Meudon, France), A. Navarro (Univ. de Murcia, Murcia, Spain) | Convergence of Scalar-Tensor theories toward General Relativity and
Primordial Nucleosynthesis | 20 Pages, 3 Figures, accepted for publication in Class. and Quantum
Gravity | Class.Quant.Grav. 19 (2002) 857-874 | 10.1088/0264-9381/19/5/302 | null | gr-qc astro-ph | null | In this paper, we analyze the conditions for convergence toward General
Relativity of scalar-tensor gravity theories defined by an arbitrary coupling
function $\alpha$ (in the Einstein frame). We show that, in general, the
evolution of the scalar field $(\phi)$ is governed by two opposite mechanisms:
an attraction me... | [
{
"created": "Tue, 15 Jan 2002 13:05:15 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Serna",
"A.",
"",
"U. Miguel Hernandez, Elche, Spain"
],
[
"Alimi",
"J. -M.",
"",
"LAEC,\n Observatoire de Meudon, France"
],
[
"Navarro",
"A.",
"",
"Univ. de Murcia, Murcia, Spain"
]
] | In this paper, we analyze the conditions for convergence toward General Relativity of scalar-tensor gravity theories defined by an arbitrary coupling function $\alpha$ (in the Einstein frame). We show that, in general, the evolution of the scalar field $(\phi)$ is governed by two opposite mechanisms: an attraction mech... |
gr-qc/0612116 | Albert V. Minkevich | A.V. Minkevich, A.S. Garkun and V.I. Kudin | Homogeneous isotropic cosmological models with pseudoscalar torsion
function in Poincare gauge theory of gravity and accelerating Universe | 8 pages, 2 figures; some misprints are corrected | Proc. of the 5th Intern. Conf. Boyai-Gauss-Lobachevsky:
Non-Euclidean Geometry in Modern Physics, Minsk, Belarus, Oct. 10-13, 2006,
p. 196-202 | null | null | gr-qc | null | The "dark energy" problem is investigated in the framework of the Poincare
gauge theory of gravity in 4-dimensional Riemann-Cartan space-time. By using
general expression for gravitational Lagrangian homogeneous isotropic
cosmological models with pseudoscalar torsion function are built and
investigated. It is shown t... | [
{
"created": "Tue, 19 Dec 2006 16:36:41 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jan 2007 11:24:12 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Minkevich",
"A. V.",
""
],
[
"Garkun",
"A. S.",
""
],
[
"Kudin",
"V. I.",
""
]
] | The "dark energy" problem is investigated in the framework of the Poincare gauge theory of gravity in 4-dimensional Riemann-Cartan space-time. By using general expression for gravitational Lagrangian homogeneous isotropic cosmological models with pseudoscalar torsion function are built and investigated. It is shown tha... |
gr-qc/9907043 | Andrew P. Bilyard | Andrew P Billyard (Dalhousie University), Alan A Coley (Dalhousie
University) and James E Lidsey (University of London) | Qualitative Analysis of Early Universe Cosmologies | Submitted to Journal of Mathematical Physics, 18 pages, 4 figures,
uses package "graphicx" to insert figures | J.Math.Phys. 40 (1999) 5092 | 10.1063/1.533017 | Dal-99-06 | gr-qc hep-th | null | A qualitative analysis is presented for a class of homogeneous cosmologies
derived from the string effective action when a cosmological constant is
present in the matter sector of the theory. Such a term has significant effects
on the qualitative dynamics. For example, models exist which undergo a series
of oscillati... | [
{
"created": "Sun, 11 Jul 1999 13:54:48 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Billyard",
"Andrew P",
"",
"Dalhousie University"
],
[
"Coley",
"Alan A",
"",
"Dalhousie\n University"
],
[
"Lidsey",
"James E",
"",
"University of London"
]
] | A qualitative analysis is presented for a class of homogeneous cosmologies derived from the string effective action when a cosmological constant is present in the matter sector of the theory. Such a term has significant effects on the qualitative dynamics. For example, models exist which undergo a series of oscillation... |
1206.5786 | Bal\'azs Mik\'oczi | Bal\'azs Mik\'oczi, Bence Kocsis, P\'eter Forg\'acs, M\'aty\'as
Vas\'uth | Parameter estimation for inspiraling eccentric compact binaries
including pericenter precession | 14 two-column pages, 12 figures, expanded version; contains the proof
corrections | Phys.Rev.D86:104027,2012 | 10.1103/PhysRevD.86.104027 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inspiraling supermassive black hole binary systems with high orbital
eccentricity are important sources for space-based gravitational wave (GW)
observatories like the Laser Interferometer Space Antenna (LISA). Eccentricity
adds orbital harmonics to the Fourier transform of the GW signal and
relativistic pericenter pr... | [
{
"created": "Mon, 25 Jun 2012 19:54:58 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Nov 2012 18:35:21 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Mikóczi",
"Balázs",
""
],
[
"Kocsis",
"Bence",
""
],
[
"Forgács",
"Péter",
""
],
[
"Vasúth",
"Mátyás",
""
]
] | Inspiraling supermassive black hole binary systems with high orbital eccentricity are important sources for space-based gravitational wave (GW) observatories like the Laser Interferometer Space Antenna (LISA). Eccentricity adds orbital harmonics to the Fourier transform of the GW signal and relativistic pericenter prec... |
1704.02404 | Yuri Bonder | Yuri Bonder | An algorithm for quantum gravity phenomenology | For the proceedings of the XI Mexican School on Gravitation and
Mathematical Physics (Dec. 2016) | null | 10.1088/1742-6596/1030/1/012001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum gravity phenomenology is the strategy towards quantum gravity where
the priority is to make contact with experiments. Here I describe what I
consider to be the best procedure to do quantum gravity phenomenology. The key
step is to have a generic parametrization which allows one to perform
self-consistency che... | [
{
"created": "Fri, 7 Apr 2017 23:47:32 GMT",
"version": "v1"
}
] | 2018-08-01 | [
[
"Bonder",
"Yuri",
""
]
] | Quantum gravity phenomenology is the strategy towards quantum gravity where the priority is to make contact with experiments. Here I describe what I consider to be the best procedure to do quantum gravity phenomenology. The key step is to have a generic parametrization which allows one to perform self-consistency check... |
1704.06539 | Shahab Shahidi | Zahra Haghani, Tiberiu Harko and Shahab Shahidi | The Maxwell-Chern-Simons gravity and its cosmological implications | 19 pages, 12 figures | Eur. Phys. J. C (2017) 77: 514 | 10.1140/epjc/s10052-017-5078-0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the cosmological implications of a gravitational theory
containing two vector fields coupled minimally to gravity as well as a
generalized Chern-Simons term that couples the two vector fields. One of the
vector fields is the usual Maxwell field, while the other is a constrained
vector field with constant ... | [
{
"created": "Fri, 21 Apr 2017 13:47:35 GMT",
"version": "v1"
}
] | 2017-08-09 | [
[
"Haghani",
"Zahra",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Shahidi",
"Shahab",
""
]
] | We consider the cosmological implications of a gravitational theory containing two vector fields coupled minimally to gravity as well as a generalized Chern-Simons term that couples the two vector fields. One of the vector fields is the usual Maxwell field, while the other is a constrained vector field with constant no... |
2212.13961 | Martin Bojowald | Martin Bojowald and Artur Tsobanjan | An algebraic approach to the "frozen formalism" problem of time | 54 pages, one figure | Phys. Rev. D 107 (2023) 024003 | 10.1103/PhysRevD.107.024003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The long-standing problem of time in canonical quantum gravity is the source
of several conceptual and technical issues. Here, recent mathematical results
are used to provide a consistent algebraic formulation of dynamical symplectic
reduction that avoids difficult requirements such as the computation of a
complete s... | [
{
"created": "Wed, 28 Dec 2022 17:05:31 GMT",
"version": "v1"
}
] | 2023-01-04 | [
[
"Bojowald",
"Martin",
""
],
[
"Tsobanjan",
"Artur",
""
]
] | The long-standing problem of time in canonical quantum gravity is the source of several conceptual and technical issues. Here, recent mathematical results are used to provide a consistent algebraic formulation of dynamical symplectic reduction that avoids difficult requirements such as the computation of a complete set... |
gr-qc/0012021 | Mauricio Bellini | Mauricio Bellini (IFM, Universidad Michoacana de San Nicolas de
Hidalgo) | Coarse-grained field wave function in stochastic inflation | to appear in Nuclear Physics B (version with some changes and some
references added) | Nucl.Phys. B604 (2001) 441-451 | 10.1016/S0550-3213(01)00196-1 | null | gr-qc astro-ph hep-ph hep-th | null | The wave function for the matter field fluctuations in the infrared sector is
studied within the framework of inflationary cosmology. These fluctuations are
described by a coarse-grained field which takes into account only the modes
with wavelength much bigger than the size of the Hubble horizon. The case of a
power-... | [
{
"created": "Tue, 5 Dec 2000 18:47:49 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Feb 2001 18:37:58 GMT",
"version": "v2"
},
{
"created": "Tue, 20 Feb 2001 23:32:25 GMT",
"version": "v3"
},
{
"created": "Tue, 10 Apr 2001 22:48:09 GMT",
"version": "v4"
}
] | 2009-10-31 | [
[
"Bellini",
"Mauricio",
"",
"IFM, Universidad Michoacana de San Nicolas de\n Hidalgo"
]
] | The wave function for the matter field fluctuations in the infrared sector is studied within the framework of inflationary cosmology. These fluctuations are described by a coarse-grained field which takes into account only the modes with wavelength much bigger than the size of the Hubble horizon. The case of a power-la... |
1908.05592 | Tao Zhou | Zonghai Li and Tao Zhou | Equivalence of Gibbons-Werner method to geodesics method in the study of
gravitational lensing | 7 pages, 1 figure, accepted for publication in Phys. Rev. D | Phys. Rev. D 101, 044043 (2020) | 10.1103/PhysRevD.101.044043 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Gibbons-Werner method where the Gauss-Bonnet theorem is applied to study
the gravitational deflection angle has received much attention recently. In
this paper, we study the equivalence of the Gibbons-Werner method to the
standard geodesics method, and it is shown that the geodesics method can be
derived with the... | [
{
"created": "Thu, 15 Aug 2019 15:42:34 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Feb 2020 17:36:39 GMT",
"version": "v2"
}
] | 2020-02-24 | [
[
"Li",
"Zonghai",
""
],
[
"Zhou",
"Tao",
""
]
] | The Gibbons-Werner method where the Gauss-Bonnet theorem is applied to study the gravitational deflection angle has received much attention recently. In this paper, we study the equivalence of the Gibbons-Werner method to the standard geodesics method, and it is shown that the geodesics method can be derived with the G... |
1803.06486 | Yasutaka Koga | Yasutaka Koga, Tomohiro Harada | Rotating accretion flows in $D$ dimensions: sonic points, critical
points and photon spheres | 11 pages | Phys. Rev. D 98, 024018 (2018) | 10.1103/PhysRevD.98.024018 | RUP-18-9 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give the formulation and the general analysis of the rotational accretion
problem on $D$-dimensional spherical spacetime and investigate sonic points and
critical points. First, we construct the simple two-dimensional rotating
accretion flow model in general $D$-dimensional static spherically symmetric
spacetime a... | [
{
"created": "Sat, 17 Mar 2018 10:31:50 GMT",
"version": "v1"
}
] | 2018-07-18 | [
[
"Koga",
"Yasutaka",
""
],
[
"Harada",
"Tomohiro",
""
]
] | We give the formulation and the general analysis of the rotational accretion problem on $D$-dimensional spherical spacetime and investigate sonic points and critical points. First, we construct the simple two-dimensional rotating accretion flow model in general $D$-dimensional static spherically symmetric spacetime and... |
0912.0481 | Cyril Pitrou | Gilles Esposito-Farese, Cyril Pitrou, Jean-Philippe Uzan | Vector theories in cosmology | 17 pages, no figure | Phys.Rev.D81:063519,2010 | 10.1103/PhysRevD.81.063519 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article provides a general study of the Hamiltonian stability and the
hyperbolicity of vector field models involving both a general function of the
Faraday tensor and its dual, $f(F^2,F\tilde F)$, as well as a Proca potential
for the vector field, $V(A^2)$. In particular it is demonstrated that theories
involvin... | [
{
"created": "Wed, 2 Dec 2009 18:14:48 GMT",
"version": "v1"
}
] | 2010-04-29 | [
[
"Esposito-Farese",
"Gilles",
""
],
[
"Pitrou",
"Cyril",
""
],
[
"Uzan",
"Jean-Philippe",
""
]
] | This article provides a general study of the Hamiltonian stability and the hyperbolicity of vector field models involving both a general function of the Faraday tensor and its dual, $f(F^2,F\tilde F)$, as well as a Proca potential for the vector field, $V(A^2)$. In particular it is demonstrated that theories involving ... |
0805.3796 | Burin Gumjudpai | Burin Gumjudpai (DAMTP U. Cambridge and TPTP Naresuan U.) | Slow-roll, acceleration, the Big Rip and WKB approximation in NLS-type
formulation of scalar field cosmology | [7 pages, no figure, more reference added, accepted by JCAP] | JCAP 0809:028,2008 | 10.1088/1475-7516/2008/09/028 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Aspects of non-linear Schr\"{o}dinger-type (NLS) formulation of scalar
(phantom) field cosmology on slow-roll, acceleration, WKB approximation and Big
Rip singularity are presented. Slow-roll parameters for the curvature and
barotropic density terms are introduced. We reexpress all slow-roll parameters,
slow-roll con... | [
{
"created": "Sat, 24 May 2008 21:18:57 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jul 2008 19:26:01 GMT",
"version": "v2"
},
{
"created": "Fri, 5 Sep 2008 18:25:04 GMT",
"version": "v3"
},
{
"created": "Thu, 25 Sep 2008 16:43:58 GMT",
"version": "v4"
},
{
"cr... | 2014-11-18 | [
[
"Gumjudpai",
"Burin",
"",
"DAMTP U. Cambridge and TPTP Naresuan U."
]
] | Aspects of non-linear Schr\"{o}dinger-type (NLS) formulation of scalar (phantom) field cosmology on slow-roll, acceleration, WKB approximation and Big Rip singularity are presented. Slow-roll parameters for the curvature and barotropic density terms are introduced. We reexpress all slow-roll parameters, slow-roll condi... |
gr-qc/9607057 | Filipe de Moraes Paiva | M. F. A. da Silva, L. Herrera, F. M. Paiva, N. O. Santos | On the parameters of Lewis metric for the Lewis class | Latex | Class.Quant.Grav.12:111-118,1995 | 10.1088/0264-9381/12/1/009 | null | gr-qc | null | The physical and geometrical meaning of the four parameters of Lewis metric
for the Lewis class are investigated. Matching this spacetime to a completely
anisotropic, rigidly rotating, fluid cylinder, we obtain from the junction
conditions that the four parameters are related to the vorticity of the source.
Furthermo... | [
{
"created": "Tue, 23 Jul 1996 17:34:18 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"da Silva",
"M. F. A.",
""
],
[
"Herrera",
"L.",
""
],
[
"Paiva",
"F. M.",
""
],
[
"Santos",
"N. O.",
""
]
] | The physical and geometrical meaning of the four parameters of Lewis metric for the Lewis class are investigated. Matching this spacetime to a completely anisotropic, rigidly rotating, fluid cylinder, we obtain from the junction conditions that the four parameters are related to the vorticity of the source. Furthermore... |
1502.07691 | Xian Gao | Xian Gao | On covariant expansion of the gravitational St\"{u}ckelberg trick | 7 pages, double column, 1 figure | Phys. Rev. D 91, 094001 (2015) | 10.1103/PhysRevD.91.094001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new approach to expanding the "St\"{u}ckelbergized" fiducial metric in a
covariant manner is developed. The idea is to consider the curved 4-dimensional
space as a codimension-one hypersurface embedded in a 5-dimensional Minkowski
bulk, in which the 5-dimensional Goldstone modes can be defined as usual. After
solvi... | [
{
"created": "Thu, 26 Feb 2015 19:38:41 GMT",
"version": "v1"
}
] | 2015-05-06 | [
[
"Gao",
"Xian",
""
]
] | A new approach to expanding the "St\"{u}ckelbergized" fiducial metric in a covariant manner is developed. The idea is to consider the curved 4-dimensional space as a codimension-one hypersurface embedded in a 5-dimensional Minkowski bulk, in which the 5-dimensional Goldstone modes can be defined as usual. After solving... |
2104.05879 | Robert Bluhm | Robert Bluhm and Yumu Yang | Gravity with Explicit Diffeomorphism Breaking | null | Symmetry 2021, 13, 660 | 10.3390/sym13040660 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Modified theories of gravity that explicitly break diffeomorphism invariance
have been used for over a decade to explore open issues related to quantum
gravity, dark energy, and dark matter. At the same time, the Standard-Model
Extension (SME) has been widely used as a phenomenological framework in
investigations of ... | [
{
"created": "Tue, 13 Apr 2021 00:58:01 GMT",
"version": "v1"
}
] | 2021-04-14 | [
[
"Bluhm",
"Robert",
""
],
[
"Yang",
"Yumu",
""
]
] | Modified theories of gravity that explicitly break diffeomorphism invariance have been used for over a decade to explore open issues related to quantum gravity, dark energy, and dark matter. At the same time, the Standard-Model Extension (SME) has been widely used as a phenomenological framework in investigations of sp... |
0907.4002 | Atsushi Higuchi | Atsushi Higuchi, Yen Cheong Lee, Jack R. Nicholas | More on the covariant retarded Green's function for the electromagnetic
field in de Sitter spacetime | 4 pages, addendum to PRD 78, 084031 (2008) [arXiv:0808.0642] | Phys.Rev.D80:107502,2009 | 10.1103/PhysRevD.80.107502 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent paper (Phys. Rev. D78, 084031 (2008), arXiv:0808.0642, Ref. [1])
it was shown in examples that the covariant retarded Green's functions in
particular gauges for electromagnetism and linearized gravity can be used to
reproduce field configurations correctly in spite of the spacelike nature of
past infinity... | [
{
"created": "Thu, 23 Jul 2009 08:53:51 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Aug 2009 16:35:00 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Higuchi",
"Atsushi",
""
],
[
"Lee",
"Yen Cheong",
""
],
[
"Nicholas",
"Jack R.",
""
]
] | In a recent paper (Phys. Rev. D78, 084031 (2008), arXiv:0808.0642, Ref. [1]) it was shown in examples that the covariant retarded Green's functions in particular gauges for electromagnetism and linearized gravity can be used to reproduce field configurations correctly in spite of the spacelike nature of past infinity i... |
gr-qc/0405069 | Alexander E. Shalyt-Margolin | A.E.Shalyt-Margolin | Pure States, Mixed States and Hawking Problem in Generalized Quantum
Mechanics | 12 pages,no figures,some corrections,new references | Mod.Phys.Lett. A19 (2004) 2037-2045 | 10.1142/S0217732304015312 | null | gr-qc | null | This paper is the continuation of a study into the information paradox
problem started by the author in his earlier works. As previously, the key
instrument is a deformed density matrix in quantum mechanics of the early
universe. It is assumed that the latter represents quantum mechanics with
fundamental length. It i... | [
{
"created": "Thu, 13 May 2004 10:37:12 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Jul 2004 06:05:46 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Shalyt-Margolin",
"A. E.",
""
]
] | This paper is the continuation of a study into the information paradox problem started by the author in his earlier works. As previously, the key instrument is a deformed density matrix in quantum mechanics of the early universe. It is assumed that the latter represents quantum mechanics with fundamental length. It is ... |
1506.06071 | Marta Campigotto | M. Campigotto, L. Fatibene | Generally Covariant vs. Gauge Structure for Conformal Field Theories | 11 pages, comments are welcome | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce the natural lift of spacetime diffeomorphisms for conformal
gravity and discuss the physical equivalence between the natural and gauge
natural structure of the theory. Accordingly, we argue that conformal
transformations must be introduced as gauge transformations (affecting fields
but not spacetime poin... | [
{
"created": "Fri, 19 Jun 2015 16:07:03 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Campigotto",
"M.",
""
],
[
"Fatibene",
"L.",
""
]
] | We introduce the natural lift of spacetime diffeomorphisms for conformal gravity and discuss the physical equivalence between the natural and gauge natural structure of the theory. Accordingly, we argue that conformal transformations must be introduced as gauge transformations (affecting fields but not spacetime point)... |
1201.3820 | Luis Cort\'es Barbado | Luis C. Barbado, Carlos Barcel\'o and Luis J. Garay | Hawking radiation as perceived by different observers: An analytic
expression for the effective-temperature function | 10 pages, 1 figure | Class.Quant.Grav.29:075013,2012 | 10.1088/0264-9381/29/7/075013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Given a field vacuum state in a black hole spacetime, this state can be
analysed in terms of how it is perceived (in terms of particle content) by
different observers. This can be done by means of the effective-temperature
function introduced by Barcel\'o et al. in [1]. In Barbado et al. [2], this
function was analys... | [
{
"created": "Wed, 18 Jan 2012 15:16:29 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Mar 2012 11:59:20 GMT",
"version": "v2"
}
] | 2016-11-26 | [
[
"Barbado",
"Luis C.",
""
],
[
"Barceló",
"Carlos",
""
],
[
"Garay",
"Luis J.",
""
]
] | Given a field vacuum state in a black hole spacetime, this state can be analysed in terms of how it is perceived (in terms of particle content) by different observers. This can be done by means of the effective-temperature function introduced by Barcel\'o et al. in [1]. In Barbado et al. [2], this function was analysed... |
1104.0442 | Kuiroukidis | Kostas Kleidis and Nicholas K. Spyrou | A conventional approach to the dark-energy concept | 15 pages, 2 figures | A&A 529, A26 (2011) | 10.1051/0004-6361/201016057 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by results implying that the constituents of dark matter (DM) might
be collisional, we consider a cosmological (toy-) model, in which the DM itself
possesses some sort of thermodynamic properties. In this case, not only can the
matter content of the Universe be treated as a classical gravitating fluid of
po... | [
{
"created": "Mon, 4 Apr 2011 00:22:16 GMT",
"version": "v1"
}
] | 2015-03-19 | [
[
"Kleidis",
"Kostas",
""
],
[
"Spyrou",
"Nicholas K.",
""
]
] | Motivated by results implying that the constituents of dark matter (DM) might be collisional, we consider a cosmological (toy-) model, in which the DM itself possesses some sort of thermodynamic properties. In this case, not only can the matter content of the Universe be treated as a classical gravitating fluid of posi... |
1506.02422 | Luis Herrera | L. Herrera | Gravitational radiation within its source | Talk given at the International Conference on Relativistic
Astrophysics (through Skype), Lahore, February 2015. To appear in the
proceedings, to be published by Punjab University Press. 9 pages, Revtex-4 | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review a recently proposed framework for studying axially symmetric
dissipative fluids \cite{Ref1}. Some general results are discussed at the most
general level. We then proceed to analyze some particular cases. First, the
shear-free case is considered \cite{3}. We shall next discuss the perfect fluid
case under t... | [
{
"created": "Mon, 8 Jun 2015 09:48:38 GMT",
"version": "v1"
}
] | 2015-06-10 | [
[
"Herrera",
"L.",
""
]
] | We review a recently proposed framework for studying axially symmetric dissipative fluids \cite{Ref1}. Some general results are discussed at the most general level. We then proceed to analyze some particular cases. First, the shear-free case is considered \cite{3}. We shall next discuss the perfect fluid case under the... |
2402.17799 | Subenoy Chakraborty | Subenoy Chakraborty and Madhukrishna Chakraborty | A Revisit to Classical and Quantum aspects of Raychaudhuri equation and
possible resolution of Singularity | 43 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this review, we provide a concrete overview of the Raychaudhuri equation,
Focusing theorem and Convergence conditions in a plethora of backgrounds and
discuss the consequences. We also present various classical and quantum
approaches suggested in the literature that could potentially mitigate the
initial big-bang ... | [
{
"created": "Tue, 27 Feb 2024 05:50:27 GMT",
"version": "v1"
}
] | 2024-02-29 | [
[
"Chakraborty",
"Subenoy",
""
],
[
"Chakraborty",
"Madhukrishna",
""
]
] | In this review, we provide a concrete overview of the Raychaudhuri equation, Focusing theorem and Convergence conditions in a plethora of backgrounds and discuss the consequences. We also present various classical and quantum approaches suggested in the literature that could potentially mitigate the initial big-bang si... |
1701.01003 | Larry Ford | Jen-Tsung Hsiang, L. H. Ford, Kin-Wang Ng and Chun-Hsien Wu | Quantum Stress Tensor Fluctuations and Primordial Gravity Waves | 33 pages, 3 figures | Phys. Rev. D 95, 063524 (2017) | 10.1103/PhysRevD.95.063524 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the effect of the stress tensor of a quantum matter field, such as
the electromagnetic field, on the spectrum of primordial gravity waves expected
in inflationary cosmology. We find that the net effect is a small reduction in
the power spectrum, especially at higher frequencies, but which has a different
f... | [
{
"created": "Wed, 4 Jan 2017 13:32:08 GMT",
"version": "v1"
}
] | 2017-04-05 | [
[
"Hsiang",
"Jen-Tsung",
""
],
[
"Ford",
"L. H.",
""
],
[
"Ng",
"Kin-Wang",
""
],
[
"Wu",
"Chun-Hsien",
""
]
] | We examine the effect of the stress tensor of a quantum matter field, such as the electromagnetic field, on the spectrum of primordial gravity waves expected in inflationary cosmology. We find that the net effect is a small reduction in the power spectrum, especially at higher frequencies, but which has a different for... |
1005.3108 | Morteza Mohseni | Morteza Mohseni | General relativistic spinning fluids with a modified projection tensor | Submitted to General Relativity and Gravitation | Gen.Rel.Grav.42:1727-1737,2010 | 10.1007/s10714-010-0943-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An energy-momentum tensor for general relativistic spinning fluids compatible
with Tulczyjew-type supplementary condition is derived from the variation of a
general Lagrangian with unspecified explicit form. This tensor is the sum of a
term containing the Belinfante-Rosenfeld tensor and a modified perfect-fluid
energ... | [
{
"created": "Tue, 18 May 2010 06:16:17 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Mohseni",
"Morteza",
""
]
] | An energy-momentum tensor for general relativistic spinning fluids compatible with Tulczyjew-type supplementary condition is derived from the variation of a general Lagrangian with unspecified explicit form. This tensor is the sum of a term containing the Belinfante-Rosenfeld tensor and a modified perfect-fluid energy-... |
2104.11553 | Jie-Xiong Mo | Shan-Quan Lan, Jie-Xiong Mo, Gu-Qiang Li and Xiao-Bao Xu | Effects of dark energy on dynamic phase transition of charged AdS black
holes | 10pages, 6figures | null | 10.1103/PhysRevD.104.104032 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Searching for the effect of quintessence dark energy on the kinetics of black
hole phase transition, we investigate in detail the dynamic phase transition of
charged AdS black holes surrounded by quintessence in this paper. Based on the
Gibbs free energy landscape, we obtain the analytic expression of the
correspondi... | [
{
"created": "Fri, 23 Apr 2021 12:23:37 GMT",
"version": "v1"
}
] | 2021-11-24 | [
[
"Lan",
"Shan-Quan",
""
],
[
"Mo",
"Jie-Xiong",
""
],
[
"Li",
"Gu-Qiang",
""
],
[
"Xu",
"Xiao-Bao",
""
]
] | Searching for the effect of quintessence dark energy on the kinetics of black hole phase transition, we investigate in detail the dynamic phase transition of charged AdS black holes surrounded by quintessence in this paper. Based on the Gibbs free energy landscape, we obtain the analytic expression of the corresponding... |
gr-qc/0306058 | Kleihaus | B. Kleihaus, J. Kunz, F. Navarro-Lerida | Rotating Dilaton Black Holes with Hair | 49 pages, 13 figures | Phys.Rev. D69 (2004) 064028 | 10.1103/PhysRevD.69.064028 | null | gr-qc hep-th | null | We consider stationary rotating black holes in SU(2) Einstein-Yang-Mills
theory, coupled to a dilaton. The black holes possess non-trivial non-Abelian
electric and magnetic fields outside their regular event horizon. While generic
solutions carry no non-Abelian magnetic charge, but non-Abelian electric
charge, the pr... | [
{
"created": "Fri, 13 Jun 2003 15:15:16 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Kleihaus",
"B.",
""
],
[
"Kunz",
"J.",
""
],
[
"Navarro-Lerida",
"F.",
""
]
] | We consider stationary rotating black holes in SU(2) Einstein-Yang-Mills theory, coupled to a dilaton. The black holes possess non-trivial non-Abelian electric and magnetic fields outside their regular event horizon. While generic solutions carry no non-Abelian magnetic charge, but non-Abelian electric charge, the pres... |
0907.2617 | Elisa Manrique | Elisa Manrique and Martin Reuter | Bimetric Truncations for Quantum Einstein Gravity and Asymptotic Safety | 48 pages, 5 figures | Annals Phys.325:785-815,2010 | 10.1016/j.aop.2009.11.009 | MZ-TH/09-17 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the average action approach to the quantization of gravity the fundamental
requirement of "background independence" is met by actually introducing a
background metric but leaving it completely arbitrary. The associated Wilsonian
renormalization group defines a coarse graining flow on a theory space of
functionals ... | [
{
"created": "Wed, 15 Jul 2009 15:19:04 GMT",
"version": "v1"
}
] | 2010-03-02 | [
[
"Manrique",
"Elisa",
""
],
[
"Reuter",
"Martin",
""
]
] | In the average action approach to the quantization of gravity the fundamental requirement of "background independence" is met by actually introducing a background metric but leaving it completely arbitrary. The associated Wilsonian renormalization group defines a coarse graining flow on a theory space of functionals wh... |
gr-qc/0108055 | Daniel Finley | Daniel Finley (Univ. of New Mexico) | Equations for Complex-Valued, Twisting, Type N, Vacuum Solutions, with
one or two Killing/homothetic vectors | 7 pages, TeX file, from a talk at GR16, Durban, South Africa, July,
2001 | null | null | null | gr-qc | null | HH-spaces, i.e., complex spacetimes, of Petrov type NxN are determined by a
trio of pde's for two functions, lambda and a, of three independent variables
(and also two gauge functions, chosen to be two of the independent variables if
one prefers). As in common integrable systems, these form a second order,
linear sys... | [
{
"created": "Thu, 23 Aug 2001 00:02:29 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Finley",
"Daniel",
"",
"Univ. of New Mexico"
]
] | HH-spaces, i.e., complex spacetimes, of Petrov type NxN are determined by a trio of pde's for two functions, lambda and a, of three independent variables (and also two gauge functions, chosen to be two of the independent variables if one prefers). As in common integrable systems, these form a second order, linear syste... |
1805.00804 | Fazlay Ahmed | Fazlay Ahmed, Muhammed Amir, Sushant G. Ghosh | Particle acceleration of two general particles in the background of
rotating Ay\'{o}n-Beato-Garc\'{i}a black holes | 17 pages, 6 figures | null | 10.1007/s10509-019-3498-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The rotating Ay\'{o}n-Beato-Garc\'{i}a (ABG) black holes, apart from mass
($M$) and rotation parameter ($a$), has an additional charge $Q$ and
encompassed the Kerr black hole as particular case when $Q=0$. We demonstrate
the ergoregions of rotating ABG black holes depend on both rotation parameter
$a$ and charge $Q$,... | [
{
"created": "Wed, 2 May 2018 13:48:25 GMT",
"version": "v1"
}
] | 2019-01-23 | [
[
"Ahmed",
"Fazlay",
""
],
[
"Amir",
"Muhammed",
""
],
[
"Ghosh",
"Sushant G.",
""
]
] | The rotating Ay\'{o}n-Beato-Garc\'{i}a (ABG) black holes, apart from mass ($M$) and rotation parameter ($a$), has an additional charge $Q$ and encompassed the Kerr black hole as particular case when $Q=0$. We demonstrate the ergoregions of rotating ABG black holes depend on both rotation parameter $a$ and charge $Q$, a... |
1707.02860 | Yuri Pavlov | Yu. V. Pavlov, O. B. Zaslavskii | Number of revolutions of a particle around a black hole: Is it infinite
or finite? | 19 pages, 3 figures | Gen. Relativ. Gravit. (2018) 50: 14 | 10.1007/s10714-017-2333-5 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a particle falling into a rotating black hole. Such a particle
makes an infinite number of revolutions $n$ from the viewpoint of a remote
observer who uses the Boyer-Lindquist type of coordinates. We examine the
behavior of $n$ when it is measured with respect to a local reference frame
that also rotates ... | [
{
"created": "Mon, 10 Jul 2017 13:49:10 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jan 2018 16:07:05 GMT",
"version": "v2"
}
] | 2018-01-11 | [
[
"Pavlov",
"Yu. V.",
""
],
[
"Zaslavskii",
"O. B.",
""
]
] | We consider a particle falling into a rotating black hole. Such a particle makes an infinite number of revolutions $n$ from the viewpoint of a remote observer who uses the Boyer-Lindquist type of coordinates. We examine the behavior of $n$ when it is measured with respect to a local reference frame that also rotates du... |
1302.7234 | Norman G\"urlebeck | Norman G\"urlebeck | Source integrals of asymptotic multipole moments | 9 pages, 1 figure, contribution to the proceedings of the conference
"Relativity and Gravitation - 100 Years after Einstein in Prague", June
25-29, 2012, Prague | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive source integrals for multipole moments that describe the behaviour
of static and axially symmetric spacetimes close to spatial infinity. We assume
isolated non-singular sources but will not restrict the matter content
otherwise. Some future applications of these source integrals of the asymptotic
multipole ... | [
{
"created": "Thu, 28 Feb 2013 15:34:55 GMT",
"version": "v1"
}
] | 2013-03-01 | [
[
"Gürlebeck",
"Norman",
""
]
] | We derive source integrals for multipole moments that describe the behaviour of static and axially symmetric spacetimes close to spatial infinity. We assume isolated non-singular sources but will not restrict the matter content otherwise. Some future applications of these source integrals of the asymptotic multipole mo... |
gr-qc/9805086 | Hong-Yi Zhou | Hong-Yi Zhou(Tsinghua U.,Beijing) | An Implication of Ether Drift | 6 pages,2 postscript figures | null | null | null | gr-qc | null | The experimental results of the two-photon absorption(TPA) and
M\"{o}ssbauer-rotor(MR) for testing the isotropy of the speed of light are
explained in an ether drift model with a drift velocity of $\sim 10^{-3}c$.
Further tests of the ether drift assumption are suggested.
| [
{
"created": "Fri, 22 May 1998 08:46:47 GMT",
"version": "v1"
},
{
"created": "Mon, 25 May 1998 14:23:29 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Zhou",
"Hong-Yi",
"",
"Tsinghua U.,Beijing"
]
] | The experimental results of the two-photon absorption(TPA) and M\"{o}ssbauer-rotor(MR) for testing the isotropy of the speed of light are explained in an ether drift model with a drift velocity of $\sim 10^{-3}c$. Further tests of the ether drift assumption are suggested. |
1805.02330 | Jiliang Jing | Ruanjing Zhang, Jiliang Jing, Songbai Chen | Strong gravitational lensing for black hole with scalar charge in
massive gravity | 14 pages, 4 figures, 3 tables | Phys. Rev. D 95, (2017) 064054 | 10.1103/PhysRevD.95.064054 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the strong gravitational lensing for black hole with scalar
charge in massive gravity. We find that the scalar charge and the type of the
black hole significantly affect the radius of the photon sphere, deflection
angle, angular image position, angular image separation, relative
magnifications and time... | [
{
"created": "Mon, 7 May 2018 03:17:08 GMT",
"version": "v1"
}
] | 2018-05-16 | [
[
"Zhang",
"Ruanjing",
""
],
[
"Jing",
"Jiliang",
""
],
[
"Chen",
"Songbai",
""
]
] | We investigate the strong gravitational lensing for black hole with scalar charge in massive gravity. We find that the scalar charge and the type of the black hole significantly affect the radius of the photon sphere, deflection angle, angular image position, angular image separation, relative magnifications and time d... |
gr-qc/9605039 | Robert Mann | C. Alvarez and R.B. Mann | Testing the Equivalence Principle in the Quantum Regime | 6 pages, harvmac, Honorable mention in the Gravity Research
Foundation Essay Contest | Gen.Rel.Grav. 29 (1997) 245-250 | 10.1023/A:1010296229642 | WATPHYS-TH96/07 | gr-qc | null | We consider possible tests of the Einstein Equivalence Principle for physical
systems in which quantum-mechanical vacuum energies cannot be neglected.
Specific tests include a search for the manifestation of non-metric effects in
Lamb-shift transitions of Hydrogenic atoms and in anomalous magnetic moments of
massive ... | [
{
"created": "Fri, 17 May 1996 21:31:38 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Alvarez",
"C.",
""
],
[
"Mann",
"R. B.",
""
]
] | We consider possible tests of the Einstein Equivalence Principle for physical systems in which quantum-mechanical vacuum energies cannot be neglected. Specific tests include a search for the manifestation of non-metric effects in Lamb-shift transitions of Hydrogenic atoms and in anomalous magnetic moments of massive le... |
1611.00654 | Sourav Sur | Sourav Sur and Arshdeep Singh Bhatia | Weakly dynamic dark energy via metric-scalar couplings with torsion | 39 pages, 16 figures, 4 tables | JCAP 1707 (2017) 039 | 10.1088/1475-7516/2017/07/039 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the dynamical aspects of dark energy in the context of a
non-minimally coupled scalar field with curvature and torsion. Whereas the
scalar field acts as the source of the trace mode of torsion, a suitable
constraint on the torsion pseudo-trace provides a mass term for the scalar
field in the effective action... | [
{
"created": "Wed, 2 Nov 2016 15:41:24 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Feb 2017 15:47:39 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Aug 2017 10:32:31 GMT",
"version": "v3"
}
] | 2017-08-18 | [
[
"Sur",
"Sourav",
""
],
[
"Bhatia",
"Arshdeep Singh",
""
]
] | We study the dynamical aspects of dark energy in the context of a non-minimally coupled scalar field with curvature and torsion. Whereas the scalar field acts as the source of the trace mode of torsion, a suitable constraint on the torsion pseudo-trace provides a mass term for the scalar field in the effective action. ... |
2006.16652 | Mariano Cadoni | M. Cadoni, M. Tuveri, A. P. Sanna | Long-Range Quantum Gravity | 10 pages, no figure | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is a tantalising possibility that quantum gravity (QG) states remaining
coherent at astrophysical, galactic and cosmological scales could exist and
that they could play a crucial role in understanding macroscopic gravitational
effects. We explore, using only general principles of General Relativity,
quantum and st... | [
{
"created": "Tue, 30 Jun 2020 10:21:38 GMT",
"version": "v1"
}
] | 2020-07-01 | [
[
"Cadoni",
"M.",
""
],
[
"Tuveri",
"M.",
""
],
[
"Sanna",
"A. P.",
""
]
] | It is a tantalising possibility that quantum gravity (QG) states remaining coherent at astrophysical, galactic and cosmological scales could exist and that they could play a crucial role in understanding macroscopic gravitational effects. We explore, using only general principles of General Relativity, quantum and stat... |
1003.3402 | Martin Scholtz | Jiri Bicak, Martin Scholtz, Paul Tod | On asymptotically flat solutions of Einstein's equations periodic in
time I. Vacuum and electrovacuum solutions | 25 pages, 2 figures, published in Class. Quant. Grav. | Classical and Quantum Gravity, Volume 27, Issue 5, 055007 (2010) | 10.1088/0264-9381/27/5/055007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By an argument similar to that of Gibbons and Stewart, but in a different
coordinate system and less restrictive gauge, we show that any
weakly-asymptotically-simple, analytic vacuum or electrovacuum solutions of the
Einstein equations which are periodic in time are necessarily stationary.
| [
{
"created": "Wed, 17 Mar 2010 16:11:55 GMT",
"version": "v1"
}
] | 2010-03-19 | [
[
"Bicak",
"Jiri",
""
],
[
"Scholtz",
"Martin",
""
],
[
"Tod",
"Paul",
""
]
] | By an argument similar to that of Gibbons and Stewart, but in a different coordinate system and less restrictive gauge, we show that any weakly-asymptotically-simple, analytic vacuum or electrovacuum solutions of the Einstein equations which are periodic in time are necessarily stationary. |
1302.1245 | Jian-Yang Zhu | Xiao Liu, Kui Xiao and Jian-Yang Zhu | Dynamical behaviors of FRW Universe containing a positive/negative
potential scalar field in loop quantum cosmology | 6 pages, 2 figures, accepted for publication in General Relativity
and Gravitation | Gen. Relativ. Gravit. 45, 1021 (2013) | 10.1007/s10714-013-1511-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamical behaviors of FRW Universe containing a posivive/negative
potential scalar field in loop quantum cosmology scenario are discussed. The
method of the phase-plane analysis is used to investigate the stability of the
Universe. It is found that the stability properties in this situation are quite
different f... | [
{
"created": "Wed, 6 Feb 2013 02:16:04 GMT",
"version": "v1"
}
] | 2014-02-03 | [
[
"Liu",
"Xiao",
""
],
[
"Xiao",
"Kui",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | The dynamical behaviors of FRW Universe containing a posivive/negative potential scalar field in loop quantum cosmology scenario are discussed. The method of the phase-plane analysis is used to investigate the stability of the Universe. It is found that the stability properties in this situation are quite different fro... |
gr-qc/9901009 | Kechkin Oleg V. | Oleg V. Kechkin | Charging Symmetries and Linearizing Potentials for Gravity Models with
Symplectic Symmetry | 12 pages in LaTex | Gen.Rel.Grav. 31 (1999) 1075-1086 | 10.1023/A:1026791817196 | null | gr-qc | null | In this paper we continue to study a class of four-dimensional gravity models
with n Abelian vector fields and Sp(2n)/U(n) coset of scalar fields. This class
contains General Relativity (n=0) and Einstein-Maxwell dilaton-axion theory
(n=1), which arizes in the low-energy limit of heterotic string theory. We
perform r... | [
{
"created": "Tue, 5 Jan 1999 16:45:36 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Kechkin",
"Oleg V.",
""
]
] | In this paper we continue to study a class of four-dimensional gravity models with n Abelian vector fields and Sp(2n)/U(n) coset of scalar fields. This class contains General Relativity (n=0) and Einstein-Maxwell dilaton-axion theory (n=1), which arizes in the low-energy limit of heterotic string theory. We perform red... |
1504.03173 | Lorenzo Sebastiani | Shynaray Myrzakul, Ratbay Myrzakulov and Lorenzo Sebastiani | Inhomogeneous fluids for warm inflation | 11 pages, final version accepted in Astrophys.Space Sci | Astrophys.Space Sci. 357 (2015) 2, 168 | 10.1007/s10509-015-2397-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inhomogeneous fluid models for warm inflation are investigated. The
early-time acceleration is supported by inhomogeneous fluid whose coupling with
radiation leads to the radiation dominated era after inflation. Several
examples are analyzed, strong dissipation regime is discussed, and the
viability of the models res... | [
{
"created": "Fri, 10 Apr 2015 03:52:14 GMT",
"version": "v1"
},
{
"created": "Wed, 20 May 2015 07:01:25 GMT",
"version": "v2"
}
] | 2015-09-21 | [
[
"Myrzakul",
"Shynaray",
""
],
[
"Myrzakulov",
"Ratbay",
""
],
[
"Sebastiani",
"Lorenzo",
""
]
] | Inhomogeneous fluid models for warm inflation are investigated. The early-time acceleration is supported by inhomogeneous fluid whose coupling with radiation leads to the radiation dominated era after inflation. Several examples are analyzed, strong dissipation regime is discussed, and the viability of the models respe... |
2008.10090 | Tim Koslowski A | Alicia Castro, Tim Koslowski | Renormalization Group Approach to the Continuum Limit of Matrix Models
of Quantum Gravity with Preferred Foliation | 12 pages, 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This contribution is not intended as a review but, by suggestion of the
editors, as a glimpse ahead into the realm of dually weighted tensor models for
quantum gravity. This class of models allows one to consider a wider class of
quantum gravity models, in particular one can formulate state sum models of
spacetime wi... | [
{
"created": "Sun, 23 Aug 2020 18:33:26 GMT",
"version": "v1"
}
] | 2020-08-25 | [
[
"Castro",
"Alicia",
""
],
[
"Koslowski",
"Tim",
""
]
] | This contribution is not intended as a review but, by suggestion of the editors, as a glimpse ahead into the realm of dually weighted tensor models for quantum gravity. This class of models allows one to consider a wider class of quantum gravity models, in particular one can formulate state sum models of spacetime with... |
2308.04875 | Paul Frampton | Paul H. Frampton | Kerr-Newman and Electromagnetic acceleration | 7 pages LaTeX. A new Section 4 included; additional references added | null | null | null | gr-qc astro-ph.CO hep-ph | http://creativecommons.org/licenses/by/4.0/ | Previous discussions of charged dark matter neglected PBH spin and employed
the Reissner-Nordstrom metric. In Nature we expect the PBHs to possess spin
which require use of the technically more challenging Kerr-Newman metric. It is
shown that the use of K-N metric retains the principal properties already
obtained usi... | [
{
"created": "Tue, 8 Aug 2023 17:53:42 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Feb 2024 15:10:04 GMT",
"version": "v2"
}
] | 2024-02-06 | [
[
"Frampton",
"Paul H.",
""
]
] | Previous discussions of charged dark matter neglected PBH spin and employed the Reissner-Nordstrom metric. In Nature we expect the PBHs to possess spin which require use of the technically more challenging Kerr-Newman metric. It is shown that the use of K-N metric retains the principal properties already obtained using... |
2004.05121 | Francisco Lobo | Marzieh Peyravi, Nematollah Riazi, Francisco S. N. Lobo | Novel thick brane solutions with $U(1)$ symmetry breaking | 14 pages, 9 figures. Comments welcome. V2: discussion and references
added. Version to appear in Eur.Phys.J.C | Eur. Phys. J. C 81, 216 (2021) | 10.1140/epjc/s10052-021-08988-y | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, using two scalar fields ($\phi$, $\psi$) coupled to 4+1
dimensional gravity, we construct novel topological brane solutions through an
explicit $U(1)$ symmetry breaking term. The potential of this model is
constructed so that two distinct degenerate vacua in the $\phi$ field exist, in
analogy to the $\p... | [
{
"created": "Fri, 10 Apr 2020 17:06:48 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Feb 2021 16:24:50 GMT",
"version": "v2"
}
] | 2021-03-08 | [
[
"Peyravi",
"Marzieh",
""
],
[
"Riazi",
"Nematollah",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | In this work, using two scalar fields ($\phi$, $\psi$) coupled to 4+1 dimensional gravity, we construct novel topological brane solutions through an explicit $U(1)$ symmetry breaking term. The potential of this model is constructed so that two distinct degenerate vacua in the $\phi$ field exist, in analogy to the $\phi... |
2102.08618 | Stefano Viaggiu | Stefano Viaggiu | The physical nature of the cosmological constant and the decoherence
scale in a renormalization-group approach | Accepted for publication in Int. J. Mod. Phys. D | IJMPD Vol. 30 Issue No. 06, Article No. 2150043, Year 2021 | 10.1142/S0218271821500437 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider the nature of the cosmological constant as due by
quantum fluctuations. Quantum fluctuations are generated at Planckian scales by
noncommutative effects and watered down at larger scales up to a decoherence
scale $L_D$ where classicality is reached. In particular, we formally depict
the pres... | [
{
"created": "Wed, 17 Feb 2021 07:45:31 GMT",
"version": "v1"
},
{
"created": "Fri, 7 May 2021 13:35:09 GMT",
"version": "v2"
}
] | 2021-05-10 | [
[
"Viaggiu",
"Stefano",
""
]
] | In this paper we consider the nature of the cosmological constant as due by quantum fluctuations. Quantum fluctuations are generated at Planckian scales by noncommutative effects and watered down at larger scales up to a decoherence scale $L_D$ where classicality is reached. In particular, we formally depict the presen... |
1611.07293 | Leandros Perivolaropoulos | Leandros Perivolaropoulos | Sub-millimeter Spatial Oscillations of Newton's Constant: Theoretical
Models and Laboratory Tests | 21 pages, 15 Figures. Published version (Phys. Rev. D 95, 084050,
2017). Typos corrected in eqs. (3.23), (3.34), (3.35). The Mathematica file
producing the Figures of the paper along with the data analysis is unchanged
and is publicly available at http://leandros.physics.uoi.gr/newt-oscil/ | Phys. Rev. D 95, 084050 (2017) | 10.1103/PhysRevD.95.084050 | null | gr-qc astro-ph.CO hep-ex hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the viability of sub-millimeter wavelength oscillating
deviations from the Newtonian potential at both the theoretical and the
experimental/observational level. At the theoretical level such deviations are
generic predictions in a wide range of extensions of General Relativity (GR)
including $f(R)$ the... | [
{
"created": "Tue, 22 Nov 2016 13:28:29 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Apr 2017 16:48:51 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Apr 2017 10:59:21 GMT",
"version": "v3"
}
] | 2017-05-10 | [
[
"Perivolaropoulos",
"Leandros",
""
]
] | We investigate the viability of sub-millimeter wavelength oscillating deviations from the Newtonian potential at both the theoretical and the experimental/observational level. At the theoretical level such deviations are generic predictions in a wide range of extensions of General Relativity (GR) including $f(R)$ theor... |
1609.09461 | Venanzi Marta Miss | Giovanni Montani, Marta Venanzi | Bianchi I cosmology in the presence of a causally regularized viscous
fluid | null | null | 10.1140/epjc/s10052-017-5042-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the dynamics of a Bianchi I cosmology in the presence of a viscous
fluid, causally regularized according to the Lichnerowicz approach. We show how
the effect induced by shear viscosity is still able to produce a matter
creation phenomenon, meaning that also in the regularized theory we address,
the Univers... | [
{
"created": "Thu, 29 Sep 2016 18:54:52 GMT",
"version": "v1"
},
{
"created": "Sat, 1 Oct 2016 20:25:32 GMT",
"version": "v2"
},
{
"created": "Wed, 22 Feb 2017 16:26:17 GMT",
"version": "v3"
}
] | 2017-09-13 | [
[
"Montani",
"Giovanni",
""
],
[
"Venanzi",
"Marta",
""
]
] | We analyze the dynamics of a Bianchi I cosmology in the presence of a viscous fluid, causally regularized according to the Lichnerowicz approach. We show how the effect induced by shear viscosity is still able to produce a matter creation phenomenon, meaning that also in the regularized theory we address, the Universe ... |
gr-qc/0011091 | David Blaschke | D. Behnke, D. Blaschke, V. Pervushin, D. Proskurin, A. Zakharov | Cosmological Consequences of Conformal General Relativity | 12 pages, talk presented at "Hot Points in Astrophysics", JINR Dubna,
Russia, August 22-26, 2000 | null | null | MPG-VT-UR 210/00 | gr-qc | null | We consider cosmological consequences of a conformal-invariant unified theory
which is dynamically equivalent to general relativity and is given in a space
with the geometry of similarity. We show that the conformal-invariant theory
offers new explanations for to such problems as the arrow of time, initial
cosmic dat... | [
{
"created": "Sun, 26 Nov 2000 18:06:12 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Behnke",
"D.",
""
],
[
"Blaschke",
"D.",
""
],
[
"Pervushin",
"V.",
""
],
[
"Proskurin",
"D.",
""
],
[
"Zakharov",
"A.",
""
]
] | We consider cosmological consequences of a conformal-invariant unified theory which is dynamically equivalent to general relativity and is given in a space with the geometry of similarity. We show that the conformal-invariant theory offers new explanations for to such problems as the arrow of time, initial cosmic data,... |
2108.04858 | Alexander Zhidenko | M. S. Churilova, R. A. Konoplya, A. Zhidenko | Analytic formula for quasinormal modes in the near-extreme
Kerr-Newman-de Sitter spacetime governed by a non-P\"oschl-Teller potential | 9 pages | Phys. Rev. D 105, 084003 (2022) | 10.1103/PhysRevD.105.084003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasinormal modes of scalar, electromagnetic, and gravitational fields in the
extreme Schwarzschild-de Sitter background are known to be expressed in
analytic form as eigenvalues of the P\"oschl-Teller wavelike equation. We show
that perturbations of fermionic fields (given by Dirac and Rarita-Schwinger
equations) do... | [
{
"created": "Tue, 10 Aug 2021 18:18:51 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Apr 2022 15:34:36 GMT",
"version": "v2"
}
] | 2022-04-07 | [
[
"Churilova",
"M. S.",
""
],
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | Quasinormal modes of scalar, electromagnetic, and gravitational fields in the extreme Schwarzschild-de Sitter background are known to be expressed in analytic form as eigenvalues of the P\"oschl-Teller wavelike equation. We show that perturbations of fermionic fields (given by Dirac and Rarita-Schwinger equations) do n... |
gr-qc/0207086 | Etesi Gabor | Gabor Etesi (Renyi Institute, Hungary) | Note on a reformulation of the strong cosmic censor conjceture based on
computability | LaTeX, 9 pages, 1 eps-figure; minor typos corrected and journal
reference added | Phys.Lett. B550 (2002) 1-7 | 10.1016/S0370-2693(02)02966-0 | null | gr-qc | null | In this letter we provide a reformulation of the strong cosmic censor
conjecture taking into account recent results on Malament--Hogarth space-times.
We claim that the strong version of the cosmic censor conjecture can be
formulated by postulating that a physically relevant space-time is either
globally hyperbolic or... | [
{
"created": "Mon, 22 Jul 2002 17:09:56 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Nov 2002 12:34:40 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Etesi",
"Gabor",
"",
"Renyi Institute, Hungary"
]
] | In this letter we provide a reformulation of the strong cosmic censor conjecture taking into account recent results on Malament--Hogarth space-times. We claim that the strong version of the cosmic censor conjecture can be formulated by postulating that a physically relevant space-time is either globally hyperbolic or p... |
1107.5334 | Christian Corda cordac | Christian Corda | Effective temperature for black holes | 10 pages,accepted for publication in Journal of High Energy Physics.
Comments are welcome | Journal of High Energy Physics Volume 2011, Number 8, 101 | 10.1007/JHEP08(2011)101 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The physical interpretation of black hole's quasinormal modes is fundamental
for realizing unitary quantum gravity theory as black holes are considered
theoretical laboratories for testing models of such an ultimate theory and
their quasinormal modes are natural candidates for an interpretation in terms
of quantum le... | [
{
"created": "Tue, 26 Jul 2011 21:06:21 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2011 14:11:56 GMT",
"version": "v2"
}
] | 2011-09-15 | [
[
"Corda",
"Christian",
""
]
] | The physical interpretation of black hole's quasinormal modes is fundamental for realizing unitary quantum gravity theory as black holes are considered theoretical laboratories for testing models of such an ultimate theory and their quasinormal modes are natural candidates for an interpretation in terms of quantum leve... |
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