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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2305.01313 | Marius Adrian Oancea | Marius A. Oancea, Tiberiu Harko | Weyl geometric effects on the propagation of light in gravitational
fields | 25 pages, 8 figures | Phys. Rev. D 109, 064020 (2024) | 10.1103/PhysRevD.109.064020 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the effects of Weyl geometry on the propagation of
electromagnetic waves and on the gravitational spin Hall effect of light. It is
usually assumed that in vacuum the electromagnetic waves propagate along null
geodesics, a result which follows from the geometrical optics approximation.
However, this model ... | [
{
"created": "Tue, 2 May 2023 10:47:36 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Mar 2024 21:39:06 GMT",
"version": "v2"
}
] | 2024-03-12 | [
[
"Oancea",
"Marius A.",
""
],
[
"Harko",
"Tiberiu",
""
]
] | We consider the effects of Weyl geometry on the propagation of electromagnetic waves and on the gravitational spin Hall effect of light. It is usually assumed that in vacuum the electromagnetic waves propagate along null geodesics, a result which follows from the geometrical optics approximation. However, this model is... |
1109.2433 | Dibakar Roychowdhury | Rabin Banerjee, Dibakar Roychowdhury | Thermodynamics of phase transition in higher dimensional AdS black holes | LaTex, 11 pages, 5 figures, To appear in JHEP | JHEP 11(2011)004 | 10.1007/JHEP11(2011)004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the thermodynamics of phase transition for $ (n+1) $
dimensional Reissner Nordstrom (RN)-AdS black holes using a grand canonical
ensemble. This phase transition is characterized by a discontinuity in specific
heat. The phase transition occurs from a lower mass black hole with negative
specific heat to ... | [
{
"created": "Mon, 12 Sep 2011 11:43:35 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Oct 2011 10:01:37 GMT",
"version": "v2"
}
] | 2015-05-30 | [
[
"Banerjee",
"Rabin",
""
],
[
"Roychowdhury",
"Dibakar",
""
]
] | We investigate the thermodynamics of phase transition for $ (n+1) $ dimensional Reissner Nordstrom (RN)-AdS black holes using a grand canonical ensemble. This phase transition is characterized by a discontinuity in specific heat. The phase transition occurs from a lower mass black hole with negative specific heat to a ... |
gr-qc/9403020 | null | H. D. Zeh | Time (a-)symmetry in a recollapsing quantum universe | 12 pages, Contribution presented at Mazagon, Spain, October 1991 | null | null | null | gr-qc | null | It is argued that Hawking's `greatest mistake' may not have been a mistake at
all. According to the canonical quantum theory of gravity for Friedmann type
universes, any time arrows of general nature can only be correlated with that
of the expansion. For recollapsing universes this seems to be facilitated in
part by ... | [
{
"created": "Thu, 10 Mar 1994 15:55:06 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Zeh",
"H. D.",
""
]
] | It is argued that Hawking's `greatest mistake' may not have been a mistake at all. According to the canonical quantum theory of gravity for Friedmann type universes, any time arrows of general nature can only be correlated with that of the expansion. For recollapsing universes this seems to be facilitated in part by qu... |
gr-qc/0505058 | Alexander Petrov Nikolaevich | A. N. Petrov | The field theoretical formulation of general relativity and gravity with
non-zero masses of gravitons | LaTeX, 18 pages, no figures. It is a translation with very minor
changes of the invited paper to the Russian book referred below. A compressed
version of the paper is in the 2-nd volume of the Proceedings to PIRT-IX,
London: 3-6 September, 2004, p.p. 433-446 | In "Searches for a mechanism of gravity", Eds. M. A. Ivanov and L.
A. Savrov, (Nizhny Novgorod, Yu. A. Nickolaev Publisher, 2004) p.p. 230-252 | null | null | gr-qc | null | It is a review paper. General relativity (GR) is presented in the field
theoretical form, where gravitational field (metric perturbations) together
with other physical fields are propagated in an auxiliary arbitrary curved
background spacetime. Conserved currents are constructed and expressed through
divergences of a... | [
{
"created": "Thu, 12 May 2005 10:41:33 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jun 2005 16:15:25 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Petrov",
"A. N.",
""
]
] | It is a review paper. General relativity (GR) is presented in the field theoretical form, where gravitational field (metric perturbations) together with other physical fields are propagated in an auxiliary arbitrary curved background spacetime. Conserved currents are constructed and expressed through divergences of ant... |
2402.00062 | Jaydeep Singh | Jaydeep Singh | High regularity waves on self-similar naked singularity interiors: decay
and the role of blue-shift | 77 pages, 6 Figures. Comments are welcome | null | null | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider solutions to the linear wave equation $\Box_{g}\varphi = 0$ on a
class of approximately $k$-self-similar naked singularity interiors. This
equation models the blue-shift effect, an instability exploited by
Christodoulou in the proof of low-regularity weak cosmic censorship. Using a
combination of resonanc... | [
{
"created": "Mon, 29 Jan 2024 01:33:00 GMT",
"version": "v1"
}
] | 2024-02-02 | [
[
"Singh",
"Jaydeep",
""
]
] | We consider solutions to the linear wave equation $\Box_{g}\varphi = 0$ on a class of approximately $k$-self-similar naked singularity interiors. This equation models the blue-shift effect, an instability exploited by Christodoulou in the proof of low-regularity weak cosmic censorship. Using a combination of resonance ... |
1803.00625 | M.C. David Marsh | M.C. David Marsh, John D. Barrow, and Chandrima Ganguly | Inhomogeneous Initial Data and Small-Field Inflation | 31 pages, 4 figures. Changes in v2: minor clarifications, some
calculations moved to an appendix. This is an author-created, un-copyedited
version of an article published in JCAP. IOP Publishing Ltd is not
responsible for any errors or omissions in this version of the manuscript or
any version derived from it | null | 10.1088/1475-7516/2018/05/026 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the robustness of small-field inflation in the presence of scalar
field inhomogeneities. Previous numerical work has shown that if the scalar
potential is flat only over a narrow interval, such as in commonly considered
inflection-point models, even small-amplitude inhomogeneities present at the
would-be ... | [
{
"created": "Wed, 28 Feb 2018 18:59:59 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Sep 2018 09:25:37 GMT",
"version": "v2"
}
] | 2018-09-05 | [
[
"Marsh",
"M. C. David",
""
],
[
"Barrow",
"John D.",
""
],
[
"Ganguly",
"Chandrima",
""
]
] | We consider the robustness of small-field inflation in the presence of scalar field inhomogeneities. Previous numerical work has shown that if the scalar potential is flat only over a narrow interval, such as in commonly considered inflection-point models, even small-amplitude inhomogeneities present at the would-be on... |
2404.19682 | Pablo Ba\~n\'on P\'erez | Pablo Banon Perez and Maarten DeKieviet | General Relativity: New insights from a Geometric Algebra approach | 9 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we present a series of techniques to describe General
Relativity using Geometric Algebra (GA). We emphasize the physical
interpretation of quantities and provide a step-by-step guide for performing
calculations. In doing so, we show how GA offers insightful information on the
physical meaning of the co... | [
{
"created": "Tue, 30 Apr 2024 16:16:35 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jul 2024 09:41:24 GMT",
"version": "v2"
}
] | 2024-07-26 | [
[
"Perez",
"Pablo Banon",
""
],
[
"DeKieviet",
"Maarten",
""
]
] | In this paper, we present a series of techniques to describe General Relativity using Geometric Algebra (GA). We emphasize the physical interpretation of quantities and provide a step-by-step guide for performing calculations. In doing so, we show how GA offers insightful information on the physical meaning of the conn... |
1411.1679 | T.G Zlosnik | H.F. Westman, T.G. Zlosnik | An introduction to the physics of Cartan gravity | Updated to reflect content of published version | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A distance can be measured by monitoring how much a wheel has rotated when
rolled without slipping. This simple idea underlies the mathematics of Cartan
geometry. The Cartan-geometric description of gravity consists of a SO(1,4)
gauge connection $A^{AB}(x)$ and a symmetry-breaking field $V^A(x)$. The clear
similarity... | [
{
"created": "Thu, 6 Nov 2014 18:14:31 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Jul 2015 08:26:39 GMT",
"version": "v2"
}
] | 2015-07-31 | [
[
"Westman",
"H. F.",
""
],
[
"Zlosnik",
"T. G.",
""
]
] | A distance can be measured by monitoring how much a wheel has rotated when rolled without slipping. This simple idea underlies the mathematics of Cartan geometry. The Cartan-geometric description of gravity consists of a SO(1,4) gauge connection $A^{AB}(x)$ and a symmetry-breaking field $V^A(x)$. The clear similarity w... |
2311.16426 | Michael Edmund Tobar | Michael Edmund Tobar | Gravitational Wave Detection and Low-Noise Sapphire Oscillators | PhD Thesis, University of Western Australia | null | null | null | gr-qc hep-ex physics.ins-det quant-ph | http://creativecommons.org/licenses/by/4.0/ | This thesis describes the development of an ultra-low noise sapphire
resonator oscillator that is tunable over X-band. While undertaking this task
the author has explained some interesting and very useful phenomena in regards
to the design and understanding of multi-mode resonant cavities and
oscillators. The oscilla... | [
{
"created": "Tue, 28 Nov 2023 02:11:42 GMT",
"version": "v1"
}
] | 2023-11-29 | [
[
"Tobar",
"Michael Edmund",
""
]
] | This thesis describes the development of an ultra-low noise sapphire resonator oscillator that is tunable over X-band. While undertaking this task the author has explained some interesting and very useful phenomena in regards to the design and understanding of multi-mode resonant cavities and oscillators. The oscillato... |
1202.3882 | Panayiotis Stavrinos | P. Stavrinos | Weak Gravitational Field in Finsler-Randers Space and Raychaudhuri
Equation | 22 pages, matches version published in GERG | null | 10.1007/s10714-012-1438-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The linearized form of the metric of a Finsler - Randers space is studied in
relation to the equations of motion, the deviation of geodesics and the
generalized Raychaudhuri equation are given for a weak gravitational field.
This equation is also derived in the framework of a tangent bundle. By using
Cartan or Berwal... | [
{
"created": "Fri, 17 Feb 2012 11:15:59 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Sep 2012 07:59:01 GMT",
"version": "v2"
}
] | 2015-06-04 | [
[
"Stavrinos",
"P.",
""
]
] | The linearized form of the metric of a Finsler - Randers space is studied in relation to the equations of motion, the deviation of geodesics and the generalized Raychaudhuri equation are given for a weak gravitational field. This equation is also derived in the framework of a tangent bundle. By using Cartan or Berwald-... |
1804.03702 | Abraham Harte | Abraham I. Harte, Peter Taylor, \'Eanna \'E. Flanagan | Foundations of the self-force problem in arbitrary dimensions | 30 pages, 1 figure | null | 10.1103/PhysRevD.97.124053 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The self-force problem---which asks how self-interaction affects a body's
motion---has been poorly studied for spacetime dimensions $d \neq 4$. We remedy
this for all $d \geq 3$ by nonperturbatively constructing momenta such that
forces and torques acting on extended, self-interacting electromagnetic charges
have the... | [
{
"created": "Tue, 10 Apr 2018 20:03:25 GMT",
"version": "v1"
}
] | 2018-08-01 | [
[
"Harte",
"Abraham I.",
""
],
[
"Taylor",
"Peter",
""
],
[
"Flanagan",
"Éanna É.",
""
]
] | The self-force problem---which asks how self-interaction affects a body's motion---has been poorly studied for spacetime dimensions $d \neq 4$. We remedy this for all $d \geq 3$ by nonperturbatively constructing momenta such that forces and torques acting on extended, self-interacting electromagnetic charges have the s... |
gr-qc/9702033 | Chris Clarke | C J S Clarke (University of Southampton) | Generalised hyperbolicity in singular space-times | This replacement alters the type of solution considered from "weak"
to a solution lying in a specified function space. 9 pages, TeX, eps figure
included with psfig | Class.Quant.Grav. 15 (1998) 975-984 | 10.1088/0264-9381/15/4/018 | null | gr-qc | null | A new concept analogous to global hyperbolicity is introduced, based on test
fields. It is shown that the space-times termed here ``curve integrable'' are
globally hyperbolic in this new sense, and a plausibility argument is given
suggesting that the result applies to shell crossing singularities. If the
assumptions ... | [
{
"created": "Tue, 18 Feb 1997 16:31:20 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Apr 1997 16:13:50 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Clarke",
"C J S",
"",
"University of Southampton"
]
] | A new concept analogous to global hyperbolicity is introduced, based on test fields. It is shown that the space-times termed here ``curve integrable'' are globally hyperbolic in this new sense, and a plausibility argument is given suggesting that the result applies to shell crossing singularities. If the assumptions be... |
gr-qc/9301021 | Ming Lu | Ming Lu and Mark B. Wise | Black Holes with a Generalized Gravitational Action | plain tex(uses phyzzx.tex), 8 pages, CALT-68-1850 | Phys.Rev.D47:3095-3098,1993 | 10.1103/PhysRevD.47.R3095 | null | gr-qc hep-th | null | Microscopic black holes are sensitive to higher dimension operators in the
gravitational action. We compute the influence of these operators on the
Schwarzschild solution using perturbation theory. All (time reversal invariant)
operators of dimension six are included (dimension four operators don't alter
the Schwarzs... | [
{
"created": "Tue, 26 Jan 1993 21:28:19 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Feb 1993 04:50:48 GMT",
"version": "v2"
}
] | 2010-01-06 | [
[
"Lu",
"Ming",
""
],
[
"Wise",
"Mark B.",
""
]
] | Microscopic black holes are sensitive to higher dimension operators in the gravitational action. We compute the influence of these operators on the Schwarzschild solution using perturbation theory. All (time reversal invariant) operators of dimension six are included (dimension four operators don't alter the Schwarzsch... |
1106.5710 | Giulia Gubitosi | Giulia Gubitosi and Flavio Mercati | Relative Locality in $\kappa$-Poincar\'e | 24 pages, 4 figures, 1 table. v2 matches accepted CQG version | Class.Quant.Grav.30:145002,2013 | 10.1088/0264-9381/30/14/145002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the $\kappa$-Poincar\'e Hopf algebra can be interpreted in the
framework of curved momentum space leading to the relativity of locality
\cite{AFKS}. We study the geometric properties of the momentum space described
by $\kappa$-Poincar\'e, and derive the consequences for particles propagation
and energy-m... | [
{
"created": "Tue, 28 Jun 2011 15:45:11 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jul 2013 16:23:53 GMT",
"version": "v2"
}
] | 2014-03-03 | [
[
"Gubitosi",
"Giulia",
""
],
[
"Mercati",
"Flavio",
""
]
] | We show that the $\kappa$-Poincar\'e Hopf algebra can be interpreted in the framework of curved momentum space leading to the relativity of locality \cite{AFKS}. We study the geometric properties of the momentum space described by $\kappa$-Poincar\'e, and derive the consequences for particles propagation and energy-mom... |
1701.01203 | Ying-Jie Zhao | Ying-Jie Zhao | Hawking radiation from the holographic screen | 2 figures | null | 10.1142/S0217732317501620 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we generalize the Parikh-Wilczek scheme to a holographic screen
in the framework of the ultraviolet self-complete quantum gravity. We calculate
that the tunneling probabilities of the massless and massive particles depend
on their energies of the particles and the mass of the holographic screen. The
rad... | [
{
"created": "Thu, 5 Jan 2017 04:04:28 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Jan 2017 10:03:51 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Feb 2017 01:37:56 GMT",
"version": "v3"
}
] | 2017-11-22 | [
[
"Zhao",
"Ying-Jie",
""
]
] | In this paper we generalize the Parikh-Wilczek scheme to a holographic screen in the framework of the ultraviolet self-complete quantum gravity. We calculate that the tunneling probabilities of the massless and massive particles depend on their energies of the particles and the mass of the holographic screen. The radia... |
1910.13198 | Shih-Yuin Lin | Shih-Yuin Lin | Seeing through a nearly black star | 21 pages, 8 figures, new appendices and references added | Phys. Rev. D 102, 025005 (2020) | 10.1103/PhysRevD.102.025005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A nearly black, gravitationally intense star of semi-transparent, spherical,
massive shell containing a few pointlike light sources inside would be
perceived not like a three-dimensional ball for a localized observer outside
the shell in terms of the affine or binocular distance. As the radius of the
spherical shell ... | [
{
"created": "Tue, 29 Oct 2019 11:12:24 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jul 2020 15:22:02 GMT",
"version": "v2"
}
] | 2020-07-08 | [
[
"Lin",
"Shih-Yuin",
""
]
] | A nearly black, gravitationally intense star of semi-transparent, spherical, massive shell containing a few pointlike light sources inside would be perceived not like a three-dimensional ball for a localized observer outside the shell in terms of the affine or binocular distance. As the radius of the spherical shell ap... |
1404.3136 | Stefano Vitale | Stefano Vitale | Space-borne Gravitational Wave Observatories | To appear GRG | null | 10.1007/s10714-014-1730-2 | Gen Relativ Gravit (2014) 46:1730 | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper describes the progress toward a space-borne gravitational wave
observatory and its foreseeable science potential. In particular the paper
describes the status of the LISA-like mission called eLISA, the reference
mission for the Gravitational Universe theme adopted by ESA for its Large
mission L3, and the st... | [
{
"created": "Fri, 11 Apr 2014 15:30:46 GMT",
"version": "v1"
}
] | 2014-04-29 | [
[
"Vitale",
"Stefano",
""
]
] | The paper describes the progress toward a space-borne gravitational wave observatory and its foreseeable science potential. In particular the paper describes the status of the LISA-like mission called eLISA, the reference mission for the Gravitational Universe theme adopted by ESA for its Large mission L3, and the stat... |
1211.3618 | Edward Malec | Janusz Karkowski and Edward Malec | Bondi accretion onto cosmological black holes | misprints corrected, matches published version | Phys. Rev. D15, vol. 87, 04400(2013) | 10.1103/PhysRevD.87.044007 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we investigate a steady accretion within the Einstein-Straus
vacuole, in the presence of the cosmological constant. The dark energy damps
the mass accretion rate and --- above certain limit --- completely stops the
steady accretion onto black holes, which in particular is prohibited in the
inflation era... | [
{
"created": "Thu, 15 Nov 2012 14:40:42 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Feb 2013 12:41:00 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Karkowski",
"Janusz",
""
],
[
"Malec",
"Edward",
""
]
] | In this paper we investigate a steady accretion within the Einstein-Straus vacuole, in the presence of the cosmological constant. The dark energy damps the mass accretion rate and --- above certain limit --- completely stops the steady accretion onto black holes, which in particular is prohibited in the inflation era a... |
1006.1225 | Hakan Andreasson | Hakan Andreasson, Markus Kunze, Gerhard Rein | Existence of axially symmetric static solutions of the Einstein-Vlasov
system | 32 pages | Commun. Math. Phys. 308, 23-47 (2011) | 10.1007/s00220-011-1324-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove the existence of static, asymptotically flat non-vacuum spacetimes
with axial symmetry where the matter is modeled as a collisionless gas. The
axially symmetric solutions of the resulting Einstein-Vlasov system are
obtained via the implicit function theorem by perturbing off a suitable
spherically symmetric ... | [
{
"created": "Mon, 7 Jun 2010 10:33:24 GMT",
"version": "v1"
}
] | 2015-05-19 | [
[
"Andreasson",
"Hakan",
""
],
[
"Kunze",
"Markus",
""
],
[
"Rein",
"Gerhard",
""
]
] | We prove the existence of static, asymptotically flat non-vacuum spacetimes with axial symmetry where the matter is modeled as a collisionless gas. The axially symmetric solutions of the resulting Einstein-Vlasov system are obtained via the implicit function theorem by perturbing off a suitable spherically symmetric st... |
1405.5129 | Luca Fabbri | Luca Fabbri | Least-Order Torsion-Gravity for Dirac Fields, and their Non-Linearity
terms | 12 pages. arXiv admin note: text overlap with arXiv:1401.7069 | Gen.Rel.Grav.47:1837(2015) | 10.1007/s10714-014-1837-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We will consider the most general least-order torsional completion of gravity
with electrodynamics for the Dirac matter fields, and we study the effects that
the torsion-spin coupling will have in inducing self-interactions among the
fermion fields themselves; we will see that such self-interactions of fermions
have ... | [
{
"created": "Tue, 20 May 2014 15:37:08 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Dec 2014 15:50:42 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Dec 2014 16:49:56 GMT",
"version": "v3"
},
{
"created": "Thu, 25 Dec 2014 01:50:38 GMT",
"version": "v4"
}
] | 2014-12-30 | [
[
"Fabbri",
"Luca",
""
]
] | We will consider the most general least-order torsional completion of gravity with electrodynamics for the Dirac matter fields, and we study the effects that the torsion-spin coupling will have in inducing self-interactions among the fermion fields themselves; we will see that such self-interactions of fermions have ef... |
2212.12599 | Alexander Goltsev | Natalia Gorobey, Alexander Lukyanenko, and A. V. Goltsev | Does the Universe have its own mass? | 8 pages | null | null | null | gr-qc quant-ph | http://creativecommons.org/licenses/by/4.0/ | Within the framework of the previously proposed formulation of the quantum
theory of gravity in terms of world histories, it was suggested that the
universe has its own mass. This quantity is analogous to the mass of a particle
in relativistic mechanics. The mass of the universe is a distribution of
non-zero values o... | [
{
"created": "Fri, 23 Dec 2022 22:01:32 GMT",
"version": "v1"
}
] | 2022-12-27 | [
[
"Gorobey",
"Natalia",
""
],
[
"Lukyanenko",
"Alexander",
""
],
[
"Goltsev",
"A. V.",
""
]
] | Within the framework of the previously proposed formulation of the quantum theory of gravity in terms of world histories, it was suggested that the universe has its own mass. This quantity is analogous to the mass of a particle in relativistic mechanics. The mass of the universe is a distribution of non-zero values of ... |
2404.16720 | Carsten Gundlach | Carsten Gundlach | Simulations of gravitational collapse in null coordinates: III.
Hyperbolicity | null | Phys. Rev. D 110, 024020 (2024) | 10.1103/PhysRevD.110.024020 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the well-posedness of the characteristic initial-boundary
value problem for the Einstein equations in Bondi-like coordinates (including
Bondi, double-null and affine). We propose a definition of strong hyperbolicity
of a system of partial differential equations of any order, and show that the
Einstein ... | [
{
"created": "Thu, 25 Apr 2024 16:31:59 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jun 2024 19:05:04 GMT",
"version": "v2"
}
] | 2024-07-11 | [
[
"Gundlach",
"Carsten",
""
]
] | We investigate the well-posedness of the characteristic initial-boundary value problem for the Einstein equations in Bondi-like coordinates (including Bondi, double-null and affine). We propose a definition of strong hyperbolicity of a system of partial differential equations of any order, and show that the Einstein eq... |
1106.2653 | Gunther Caspar | Gunther Caspar | Die Reissner-Nordstr\"om-Metrik in der Pseudokomplexen Allgemeinen
Relativit\"atstheorie | Master Thesis | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This master thesis discusses the Reissner-Nordstr\"om metric and the dirac
equation in curved spaces in the pseudo-complex General Relativity (pc-GR) and
reviews the original ansatz of pc-GR. It is written in German.
| [
{
"created": "Tue, 14 Jun 2011 09:40:56 GMT",
"version": "v1"
}
] | 2011-06-15 | [
[
"Caspar",
"Gunther",
""
]
] | This master thesis discusses the Reissner-Nordstr\"om metric and the dirac equation in curved spaces in the pseudo-complex General Relativity (pc-GR) and reviews the original ansatz of pc-GR. It is written in German. |
2205.11072 | Ali \"Ovg\"un Dr. | Akhil Uniyal, Reggie C. Pantig, Ali \"Ovg\"un | Probing a nonlinear electrodynamics black hole with thin accretion disk,
shadow and deflection angle with M87* and Sgr A* from EHT | 23 pages, two-column, Accepted for publication in Physics of the Dark
Universe (https://linkinghub.elsevier.com/retrieve/pii/S2212686423000122) | Physics of the Dark Universe 40 (2023) 101178 | 10.1016/j.dark.2023.101178 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Non-linear interaction between the electromagnetic fields (EMF) occurs when
vacuum polarization in quantum electrodynamics (QED) happens. The field of
non-linear electrodynamics, which may result from this interaction, could have
important effects on black hole physics. This paper considers the
asymptotically flat bl... | [
{
"created": "Mon, 23 May 2022 06:40:16 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Feb 2023 12:01:36 GMT",
"version": "v2"
}
] | 2023-02-09 | [
[
"Uniyal",
"Akhil",
""
],
[
"Pantig",
"Reggie C.",
""
],
[
"Övgün",
"Ali",
""
]
] | Non-linear interaction between the electromagnetic fields (EMF) occurs when vacuum polarization in quantum electrodynamics (QED) happens. The field of non-linear electrodynamics, which may result from this interaction, could have important effects on black hole physics. This paper considers the asymptotically flat blac... |
1410.8337 | Xuefeng Zhang | Xuefeng Zhang, H. Lu | Critical Behavior in a Massless Scalar Field Collapse with
Self-interaction Potential | 19 pages, 6 figures | Phys. Rev. D 91, 044046 (2015) | 10.1103/PhysRevD.91.044046 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine a one-parameter family of analytical solutions representing
spherically symmetric collapse of a nonlinear massless scalar field with
self-interaction in an asymptotically flat spacetime. The time evolution
exhibits a type of critical behavior. Depending on the scalar charge parameter
$q$ as compared to a c... | [
{
"created": "Thu, 30 Oct 2014 11:54:35 GMT",
"version": "v1"
}
] | 2015-03-05 | [
[
"Zhang",
"Xuefeng",
""
],
[
"Lu",
"H.",
""
]
] | We examine a one-parameter family of analytical solutions representing spherically symmetric collapse of a nonlinear massless scalar field with self-interaction in an asymptotically flat spacetime. The time evolution exhibits a type of critical behavior. Depending on the scalar charge parameter $q$ as compared to a cri... |
1405.7491 | Md. Wali Hossain | Md. Wali Hossain, R. Myrzakulov, M. Sami, Emmanuel N. Saridakis | Evading Lyth bound in models of quintessential inflation | 6 Latex pages, no figures, reference updated and typos corrected, To
appear in PLB | Physics Letters B 737 (2014) 191-195 | 10.1016/j.physletb.2014.08.051 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quintessential inflation refers to an attempt to unify inflation and
late-time cosmic acceleration using a single scalar field. In this letter we
consider two different classes of quintessential inflation, one of which is
based upon a Lagrangian with non-canonical kinetic term $k^2(\phi)\partial^\mu
\phi \partial_\mu... | [
{
"created": "Thu, 29 May 2014 08:29:09 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jun 2014 10:33:41 GMT",
"version": "v2"
},
{
"created": "Wed, 20 Aug 2014 13:03:47 GMT",
"version": "v3"
}
] | 2014-09-01 | [
[
"Hossain",
"Md. Wali",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Sami",
"M.",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | Quintessential inflation refers to an attempt to unify inflation and late-time cosmic acceleration using a single scalar field. In this letter we consider two different classes of quintessential inflation, one of which is based upon a Lagrangian with non-canonical kinetic term $k^2(\phi)\partial^\mu \phi \partial_\mu \... |
gr-qc/0511163 | Burkhard Zink | Burkhard Zink, Enrique Pazos, Peter Diener, Manuel Tiglio | Cauchy-perturbative matching revisited: tests in spherical symmetry | 14 pages, 20 figures | Phys.Rev. D73 (2006) 084011 | 10.1103/PhysRevD.73.084011 | null | gr-qc | null | During the last few years progress has been made on several fronts making it
possible to revisit Cauchy-perturbative matching (CPM) in numerical relativity
in a more robust and accurate way. This paper is the first in a series where we
plan to analyze CPM in the light of these new results.
Here we start by testing ... | [
{
"created": "Wed, 30 Nov 2005 12:37:50 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Zink",
"Burkhard",
""
],
[
"Pazos",
"Enrique",
""
],
[
"Diener",
"Peter",
""
],
[
"Tiglio",
"Manuel",
""
]
] | During the last few years progress has been made on several fronts making it possible to revisit Cauchy-perturbative matching (CPM) in numerical relativity in a more robust and accurate way. This paper is the first in a series where we plan to analyze CPM in the light of these new results. Here we start by testing high... |
2402.18536 | Shahn Majid | Shahn Majid | Quantum Gravity: are we there yet? | 19 pages 6 figures, research + review (intended for a volume on 25
years into the millennium) | null | null | null | gr-qc hep-th math.QA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The turn of the millennium was a time of optimism about an approach to
noncommutative geometry inspired by rich mathematical objects called `quantum
groups' and its applications to quantum spacetime. This would model quantum
gravity effects as noncommutativity of spacetime coordinates and was arguably
going to solve ... | [
{
"created": "Wed, 28 Feb 2024 18:17:25 GMT",
"version": "v1"
}
] | 2024-02-29 | [
[
"Majid",
"Shahn",
""
]
] | The turn of the millennium was a time of optimism about an approach to noncommutative geometry inspired by rich mathematical objects called `quantum groups' and its applications to quantum spacetime. This would model quantum gravity effects as noncommutativity of spacetime coordinates and was arguably going to solve qu... |
1701.03316 | Paingalil Kunjan Suresh | N. Malsawmtluangi and P.K.Suresh | Graviton mass constraint from CMB | 15 pages, 5 figures. arXiv admin note: substantial text overlap with
arXiv:1603.05836 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The effect of primordial massive gravitational waves on the BB-mode
correlation angular power spectrum of CMB is studied for several inflation
models. The angular power spectrum with the BICEP2/Keck Array and Planck joint
data suggests further constraint on the lower and upper bounds on the mass of
primordial gravito... | [
{
"created": "Thu, 12 Jan 2017 11:37:02 GMT",
"version": "v1"
}
] | 2021-11-28 | [
[
"Malsawmtluangi",
"N.",
""
],
[
"Suresh",
"P. K.",
""
]
] | The effect of primordial massive gravitational waves on the BB-mode correlation angular power spectrum of CMB is studied for several inflation models. The angular power spectrum with the BICEP2/Keck Array and Planck joint data suggests further constraint on the lower and upper bounds on the mass of primordial gravitons |
1912.12890 | Jaros{\l}aw Kopi\'nski | Jaros{\l}aw Kopi\'nski, Jacek Tafel | The Penrose inequality for nonmaximal perturbations of the Schwarzschild
initial data | 11 pages | Class. Quantum Grav. 37 105006 2020 | 10.1088/1361-6382/ab8353 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the Penrose inequality is satisfied for a class of conformally
flat axially symmetric nonmaximal perturbations of the Schwarzschild data. A
role of horizon is played by a marginally outer trapped surface which does not
have to be minimal.
| [
{
"created": "Mon, 30 Dec 2019 11:40:25 GMT",
"version": "v1"
}
] | 2020-05-19 | [
[
"Kopiński",
"Jarosław",
""
],
[
"Tafel",
"Jacek",
""
]
] | We show that the Penrose inequality is satisfied for a class of conformally flat axially symmetric nonmaximal perturbations of the Schwarzschild data. A role of horizon is played by a marginally outer trapped surface which does not have to be minimal. |
gr-qc/0210050 | Miguel Alcubierre | Miguel Alcubierre | Hyperbolic slicings of spacetime: singularity avoidance and gauge shocks | 11 pages, revtex4. Change in acknowledgments | Class.Quant.Grav. 20 (2003) 607-624 | 10.1088/0264-9381/20/4/304 | null | gr-qc | null | I study the Bona-Masso family of hyperbolic slicing conditions, considering
in particular its properties when approaching two different types of
singularities: focusing singularities and gauge shocks. For focusing
singularities, I extend the original analysis of Bona et. al and show that both
marginal and strong sing... | [
{
"created": "Tue, 15 Oct 2002 19:40:52 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Nov 2002 22:03:28 GMT",
"version": "v2"
}
] | 2017-08-23 | [
[
"Alcubierre",
"Miguel",
""
]
] | I study the Bona-Masso family of hyperbolic slicing conditions, considering in particular its properties when approaching two different types of singularities: focusing singularities and gauge shocks. For focusing singularities, I extend the original analysis of Bona et. al and show that both marginal and strong singul... |
gr-qc/0212071 | Roustam Zalaletdinov | Roustam Zalaletdinov | Averaging out Inhomogeneous Newtonian Cosmologies: II. Newtonian
Cosmology and the Navier-Stokes-Poisson Equations | 29 pages, LaTeX | null | null | null | gr-qc physics.flu-dyn | null | The basic concepts and equations of Newtonian Cosmology are presented in the
form necessary for the derivation and analysis of the averaged
Navier-Stokes-Poisson equations. A particular attention is paid to the physical
and cosmological hypotheses about the structure of Newtonian universes. The
system of the Navier-S... | [
{
"created": "Tue, 17 Dec 2002 08:30:57 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Dec 2002 03:27:39 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Zalaletdinov",
"Roustam",
""
]
] | The basic concepts and equations of Newtonian Cosmology are presented in the form necessary for the derivation and analysis of the averaged Navier-Stokes-Poisson equations. A particular attention is paid to the physical and cosmological hypotheses about the structure of Newtonian universes. The system of the Navier-Sto... |
1012.1379 | Alberto Molgado | Ruben Cordero, Alberto Molgado, Efrain Rojas | Quantum charged rigid membrane | 17 pages, 2 figures, published version | Class.Quant.Grav.28:065010,2011 | 10.1088/0264-9381/28/6/065010 | DCP-10-04 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The early Dirac proposal to model the electron as a charged membrane is
reviewed. A rigidity term, instead of the natural membrane tension, involving
linearly the extrinsic curvature of the worldvolume swept out by the membrane
is considered in the action modeling the bubble in the presence of an
electromagnetic fiel... | [
{
"created": "Tue, 7 Dec 2010 01:59:20 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Feb 2011 15:44:28 GMT",
"version": "v2"
}
] | 2011-03-18 | [
[
"Cordero",
"Ruben",
""
],
[
"Molgado",
"Alberto",
""
],
[
"Rojas",
"Efrain",
""
]
] | The early Dirac proposal to model the electron as a charged membrane is reviewed. A rigidity term, instead of the natural membrane tension, involving linearly the extrinsic curvature of the worldvolume swept out by the membrane is considered in the action modeling the bubble in the presence of an electromagnetic field.... |
1702.03905 | Charles Wang | Diego A. Quinones, Teodora Oniga, Benjamin T. H. Varcoe, Charles H.-T.
Wang | Quantum principle of sensing gravitational waves: From the zero-point
fluctuations to the cosmological stochastic background of spacetime | 14 pages, 4 figures, with typo corrections | Phys. Rev. D 96, 044018 (2017) | 10.1103/PhysRevD.96.044018 | null | gr-qc astro-ph.CO quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We carry out a theoretical investigation on the collective dynamics of an
ensemble of correlated atoms, subject to both vacuum fluctuations of spacetime
and stochastic gravitational waves. A general approach is taken with the
derivation of a quantum master equation capable of describing arbitrary
confined nonrelativi... | [
{
"created": "Mon, 13 Feb 2017 18:14:09 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Jul 2017 13:03:01 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Aug 2017 15:58:07 GMT",
"version": "v3"
},
{
"created": "Sat, 17 Mar 2018 16:44:02 GMT",
"version": "v4"
}
] | 2018-03-20 | [
[
"Quinones",
"Diego A.",
""
],
[
"Oniga",
"Teodora",
""
],
[
"Varcoe",
"Benjamin T. H.",
""
],
[
"Wang",
"Charles H. -T.",
""
]
] | We carry out a theoretical investigation on the collective dynamics of an ensemble of correlated atoms, subject to both vacuum fluctuations of spacetime and stochastic gravitational waves. A general approach is taken with the derivation of a quantum master equation capable of describing arbitrary confined nonrelativist... |
gr-qc/9308002 | null | Carlo Rovelli and Lee Smolin | The physical hamiltonian in nonperturbative quantum gravity | Latex, 11 pages, no figures, CGPG/93/2 | Phys.Rev.Lett.72:446-449,1994 | 10.1103/PhysRevLett.72.446 | null | gr-qc | null | A quantum hamiltonian which evolves the gravitational field according to time
as measured by constant surfaces of a scalar field is defined through a
regularization procedure based on the loop representation, and is shown to be
finite and diffeomorphism invariant. The problem of constructing this
hamiltonian is reduc... | [
{
"created": "Thu, 5 Aug 1993 17:21:00 GMT",
"version": "v1"
}
] | 2011-09-30 | [
[
"Rovelli",
"Carlo",
""
],
[
"Smolin",
"Lee",
""
]
] | A quantum hamiltonian which evolves the gravitational field according to time as measured by constant surfaces of a scalar field is defined through a regularization procedure based on the loop representation, and is shown to be finite and diffeomorphism invariant. The problem of constructing this hamiltonian is reduced... |
1310.6272 | Marian Boguna | Marian Boguna, Maksim Kitsak, and Dmitri Krioukov | Cosmological networks | null | New J. Phys. 16, 093031 (2014) | 10.1088/1367-2630/16/9/093031 | null | gr-qc astro-ph.CO physics.soc-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Networks often represent systems that do not have a long history of studies
in traditional fields of physics, albeit there are some notable exceptions such
as energy landscapes and quantum gravity. Here we consider networks that
naturally arise in cosmology. Nodes in these networks are stationary observers
uniformly ... | [
{
"created": "Wed, 23 Oct 2013 16:12:57 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Oct 2014 08:16:05 GMT",
"version": "v2"
}
] | 2014-10-21 | [
[
"Boguna",
"Marian",
""
],
[
"Kitsak",
"Maksim",
""
],
[
"Krioukov",
"Dmitri",
""
]
] | Networks often represent systems that do not have a long history of studies in traditional fields of physics, albeit there are some notable exceptions such as energy landscapes and quantum gravity. Here we consider networks that naturally arise in cosmology. Nodes in these networks are stationary observers uniformly di... |
2307.13130 | Nikolaos Mavromatos | Nick E. Mavromatos, Joan Sol\`a Peracaula and Adri\`a G\'omez-Valent | String-inspired running-vacuum cosmology, quantum corrections and the
current cosmological tensions | 12 pages, latex (uses special (Springer Proceedings) macros), one pdf
figure incorporated; Invited plenary talk (NEM) at 40th Conference on Recent
Developments in High Energy Physics and Cosmology (HEP2023, 5-7 April 2023,
U. of Ioannina (Greece)),based partly on e-Print:2305.15774 [gr-qc]. arXiv
admin note: te... | null | null | KCL-PH-TH/2023-40 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of a string-inspired running vacuum model (RVM) of cosmology
with anomalies and torsion-induced axion-like fields, we discuss quantum
corrections to the corresponding energy density, in approximately de Sitter
eras, during which the Hubble parameter $H(t)$ varies very slowly with the
cosmic time $t$. S... | [
{
"created": "Mon, 24 Jul 2023 21:12:37 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Jul 2023 19:40:25 GMT",
"version": "v2"
}
] | 2023-07-28 | [
[
"Mavromatos",
"Nick E.",
""
],
[
"Peracaula",
"Joan Solà",
""
],
[
"Gómez-Valent",
"Adrià",
""
]
] | In the context of a string-inspired running vacuum model (RVM) of cosmology with anomalies and torsion-induced axion-like fields, we discuss quantum corrections to the corresponding energy density, in approximately de Sitter eras, during which the Hubble parameter $H(t)$ varies very slowly with the cosmic time $t$. Suc... |
1805.04562 | Valeri Frolov P | Valeri P. Frolov | Remarks on black hole entropy | Contribution to Memorial Volume for Jacob Bekenstein, 18 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The notion of black-hole entropy was introduced by Jacob Bekenstein in 1972.
During past 45 years this subject was in the center of interests of the modern
theoretical physics. In this paper we briefly discuss "puzzles" of the
black-hole physics, connected with their entropy. We also demonstrate that when
the standar... | [
{
"created": "Fri, 11 May 2018 19:14:25 GMT",
"version": "v1"
}
] | 2018-05-15 | [
[
"Frolov",
"Valeri P.",
""
]
] | The notion of black-hole entropy was introduced by Jacob Bekenstein in 1972. During past 45 years this subject was in the center of interests of the modern theoretical physics. In this paper we briefly discuss "puzzles" of the black-hole physics, connected with their entropy. We also demonstrate that when the standard ... |
2011.10982 | Caglar Pala | Caglar Pala, Ertan Kok, Ozcan Sert, Muzaffer Adak | A modified gravity model coupled to a Dirac field in 2D spacetimes with
quadratic nonmetricity and curvature | Accepted for publication in IJGMMP | Int. J. Geom. Meth. Mod.Phys. 19 (2022) 2250045 | 10.1142/S0219887822500451 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After summarizing basic concepts for the exterior algebra we firstly discuss
the gauge structure of the bundle over base manifold for deciding the form of
the gravitational sector of the total Lagrangian in any dimensions. Then we
couple minimally a Dirac spinor field to our gravitational Lagrangian 2-form
which is q... | [
{
"created": "Sun, 22 Nov 2020 10:55:58 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Mar 2021 15:12:13 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Dec 2021 20:52:16 GMT",
"version": "v3"
}
] | 2023-07-17 | [
[
"Pala",
"Caglar",
""
],
[
"Kok",
"Ertan",
""
],
[
"Sert",
"Ozcan",
""
],
[
"Adak",
"Muzaffer",
""
]
] | After summarizing basic concepts for the exterior algebra we firstly discuss the gauge structure of the bundle over base manifold for deciding the form of the gravitational sector of the total Lagrangian in any dimensions. Then we couple minimally a Dirac spinor field to our gravitational Lagrangian 2-form which is qua... |
0805.3337 | Eanna E. Flanagan | Tanja Hinderer, Eanna E. Flanagan | Two timescale analysis of extreme mass ratio inspirals in Kerr. I.
Orbital Motion | 40 pages, 4 figures, revtex format. Corrected error in interpretation
of previous work. Discussion of utility of adiabatic templates expanded | Phys.Rev.D78:064028,2008 | 10.1103/PhysRevD.78.064028 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inspirals of stellar mass compact objects into massive black holes are an
important source for future gravitational wave detectors such as Advanced LIGO
and LISA. Detection of these sources and extracting information from the signal
relies on accurate theoretical models of the binary dynamics. We cast the
equations d... | [
{
"created": "Wed, 21 May 2008 19:48:20 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Jun 2008 21:34:36 GMT",
"version": "v2"
}
] | 2009-02-20 | [
[
"Hinderer",
"Tanja",
""
],
[
"Flanagan",
"Eanna E.",
""
]
] | Inspirals of stellar mass compact objects into massive black holes are an important source for future gravitational wave detectors such as Advanced LIGO and LISA. Detection of these sources and extracting information from the signal relies on accurate theoretical models of the binary dynamics. We cast the equations des... |
1910.08645 | Alexander Grant | Alexander M. Grant, \'Eanna \'E. Flanagan | Conserved currents for electromagnetic fields in the Kerr spacetime | 25 pages; v2: fixed typo, added clarification; v3: matches published
version | Class. Quant. Grav. 37, 18 (2020) | 10.1088/1361-6382/ab995a | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a variety of conserved currents for test electromagnetic fields
on a Kerr background. Our procedure, which involves the symplectic product for
electromagnetism and symmetry operators, generates the conserved currents given
by Andersson, B\"ackdahl, and Blue (2015), as well as a new conserved current.
The... | [
{
"created": "Fri, 18 Oct 2019 22:14:18 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Nov 2019 18:52:18 GMT",
"version": "v2"
},
{
"created": "Fri, 11 Sep 2020 19:30:02 GMT",
"version": "v3"
}
] | 2020-09-15 | [
[
"Grant",
"Alexander M.",
""
],
[
"Flanagan",
"Éanna É.",
""
]
] | We construct a variety of conserved currents for test electromagnetic fields on a Kerr background. Our procedure, which involves the symplectic product for electromagnetism and symmetry operators, generates the conserved currents given by Andersson, B\"ackdahl, and Blue (2015), as well as a new conserved current. These... |
0911.3363 | Theodore A. Jacobson | Ted Jacobson and Thomas P. Sotiriou | Spinning Black Holes as Particle Accelerators | 3 pages; v2: references added, minor modifications to match version
published in PRL | Phys.Rev.Lett.104:021101,2010 | 10.1103/PhysRevLett.104.021101 | null | gr-qc astro-ph.CO astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has recently been pointed out that particles falling freely from rest at
infinity outside a Kerr black hole can in principle collide with arbitrarily
high center of mass energy in the limiting case of maximal black hole spin.
Here we aim to elucidate the mechanism for this fascinating result, and to
point out its ... | [
{
"created": "Tue, 17 Nov 2009 20:51:40 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Jan 2010 00:11:17 GMT",
"version": "v2"
}
] | 2010-04-21 | [
[
"Jacobson",
"Ted",
""
],
[
"Sotiriou",
"Thomas P.",
""
]
] | It has recently been pointed out that particles falling freely from rest at infinity outside a Kerr black hole can in principle collide with arbitrarily high center of mass energy in the limiting case of maximal black hole spin. Here we aim to elucidate the mechanism for this fascinating result, and to point out its pr... |
2202.07950 | Roy Barzel | Roy Barzel, David Edward Bruschi, Andreas W. Schell, Claus Laemmerzahl | Observer dependence of photon bunching: The influence of the
relativistic redshift on Hong-Ou-Mandel interference | 11 pages, 4 figures | Phys. Rev. D 105, 105016 (2022) | 10.1103/PhysRevD.105.105016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the influence of the relativistic redshift on Hong-Ou-Mandel (HOM)
interference, and present a genuine quantum test of general relativity. We use
Glauber's theory of quantum coherence to predict the coincidence probability of
realistic broadband photons in HOM-experiments in a non-relativistic setting.
We ex... | [
{
"created": "Wed, 16 Feb 2022 09:36:45 GMT",
"version": "v1"
}
] | 2022-05-30 | [
[
"Barzel",
"Roy",
""
],
[
"Bruschi",
"David Edward",
""
],
[
"Schell",
"Andreas W.",
""
],
[
"Laemmerzahl",
"Claus",
""
]
] | We study the influence of the relativistic redshift on Hong-Ou-Mandel (HOM) interference, and present a genuine quantum test of general relativity. We use Glauber's theory of quantum coherence to predict the coincidence probability of realistic broadband photons in HOM-experiments in a non-relativistic setting. We exte... |
2111.12032 | Rodrigo Tenorio | Rodrigo Tenorio, Luana M. Modafferi, David Keitel, Alicia M. Sintes | Empirically estimating the distribution of the loudest candidate from a
gravitational-wave search | 24 pages, 23 figures, comments welcome. Package freely available in
https://github.com/Rodrigo-Tenorio/distromax | Phys. Rev. D 105, 044029 (2022) | 10.1103/PhysRevD.105.044029 | LIGO-P2100277 | gr-qc astro-ph.IM physics.data-an | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Searches for gravitational-wave signals are often based on maximizing a
detection statistic over a bank of waveform templates, covering a given
parameter space with a variable level of correlation. Results are often
evaluated using a noise-hypothesis test, where the background is characterized
by the sampling distrib... | [
{
"created": "Tue, 23 Nov 2021 17:40:15 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Nov 2021 11:08:33 GMT",
"version": "v2"
},
{
"created": "Mon, 14 Feb 2022 16:21:26 GMT",
"version": "v3"
}
] | 2022-02-15 | [
[
"Tenorio",
"Rodrigo",
""
],
[
"Modafferi",
"Luana M.",
""
],
[
"Keitel",
"David",
""
],
[
"Sintes",
"Alicia M.",
""
]
] | Searches for gravitational-wave signals are often based on maximizing a detection statistic over a bank of waveform templates, covering a given parameter space with a variable level of correlation. Results are often evaluated using a noise-hypothesis test, where the background is characterized by the sampling distribut... |
1309.5761 | Maxim Eingorn | Maxim V. Eingorn, Vitaliy D. Rusov | Inflation due to quantum potential | 8 pages, 1 figure | Foundations of Physics 45, pp 875-882 (2015) | 10.1007/s10701-015-9897-2 | null | gr-qc astro-ph.CO hep-ph hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of a cosmological model of the Universe filled with a
nonrelativistic particle soup, we easily reproduce inflation due to the quantum
potential. The lightest particles in the soup serve as a driving force of this
simple, natural and promising mechanism. It is explicitly demonstrated that the
appropri... | [
{
"created": "Mon, 23 Sep 2013 10:49:39 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jul 2015 17:06:36 GMT",
"version": "v2"
}
] | 2015-07-22 | [
[
"Eingorn",
"Maxim V.",
""
],
[
"Rusov",
"Vitaliy D.",
""
]
] | In the framework of a cosmological model of the Universe filled with a nonrelativistic particle soup, we easily reproduce inflation due to the quantum potential. The lightest particles in the soup serve as a driving force of this simple, natural and promising mechanism. It is explicitly demonstrated that the appropriat... |
gr-qc/0307113 | Xavier Siemens | Xavier Siemens and Ken D. Olum | Cosmic String Cusps with Small-Scale Structure: Their Forms and
Gravitational Waveforms | RevTeX, 8 pages. Replaced with version accepted for publication by
PRD | Phys.Rev. D68 (2003) 085017 | 10.1103/PhysRevD.68.085017 | null | gr-qc | null | We present a method for the introduction of small-scale structure into
strings constructed from products of rotation matrices. We use this method to
illustrate a range of possibilities for the shape of cusps that depends on the
properties of the small-scale structure. We further argue that the presence of
structure a... | [
{
"created": "Mon, 28 Jul 2003 19:17:16 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Sep 2003 17:44:41 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Siemens",
"Xavier",
""
],
[
"Olum",
"Ken D.",
""
]
] | We present a method for the introduction of small-scale structure into strings constructed from products of rotation matrices. We use this method to illustrate a range of possibilities for the shape of cusps that depends on the properties of the small-scale structure. We further argue that the presence of structure at ... |
1301.5138 | Dong-han Yeom | Wontae Kim, Bum-Hoon Lee, Dong-han Yeom | Black hole complementarity and firewall in two dimensions | 18 pages, 3 figures | JHEP 1305:060,2013 | 10.1007/JHEP05(2013)060 | YITP-13-33 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In connection with black hole complementarity, we study the possibility of
the duplication of information in the RST model which is an exactly soluble
quantized model in two dimensions. We find that the duplication of information
can be observed without resort to assuming an excessively large number of
scalar fields.... | [
{
"created": "Tue, 22 Jan 2013 10:59:17 GMT",
"version": "v1"
},
{
"created": "Wed, 22 May 2013 02:15:12 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Kim",
"Wontae",
""
],
[
"Lee",
"Bum-Hoon",
""
],
[
"Yeom",
"Dong-han",
""
]
] | In connection with black hole complementarity, we study the possibility of the duplication of information in the RST model which is an exactly soluble quantized model in two dimensions. We find that the duplication of information can be observed without resort to assuming an excessively large number of scalar fields. I... |
gr-qc/9508061 | null | Giampiero Esposito and Cosimo Stornaiolo | Linear Form of Canonical Gravity | 5 pages, plain-tex | NuovoCim.B111:271-274,1996 | 10.1007/BF02724650 | DSF 95/38 | gr-qc | null | Recent work in the literature has shown that general relativity can be
formulated in terms of a jet bundle which, in local coordinates, has five
entries: local coordinates on Lorentzian space-time, tetrads, connection
one-forms, multivelocities corresponding to the tetrads and multivelocities
corresponding to the con... | [
{
"created": "Wed, 30 Aug 1995 13:22:11 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Esposito",
"Giampiero",
""
],
[
"Stornaiolo",
"Cosimo",
""
]
] | Recent work in the literature has shown that general relativity can be formulated in terms of a jet bundle which, in local coordinates, has five entries: local coordinates on Lorentzian space-time, tetrads, connection one-forms, multivelocities corresponding to the tetrads and multivelocities corresponding to the conne... |
gr-qc/9912015 | Carmen Chicone | C. Chicone, B. Mashhoon, and D. G. Retzloff | Chaos in the Hill system | 35 pages, 6 figures | Helv.Phys.Acta 72 (1999) 123-157 | null | null | gr-qc astro-ph nlin.CD | null | We define the general Hill system and briefly analyze its dynamical behavior.
A particular Hill system representing the interaction of a Keplerian binary
system with a normally incident circularly polarized gravitational wave is
discussed in detail. In this case, we compute the Poincar\'e-Melnikov function
explicitly... | [
{
"created": "Thu, 2 Dec 1999 23:11:38 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Chicone",
"C.",
""
],
[
"Mashhoon",
"B.",
""
],
[
"Retzloff",
"D. G.",
""
]
] | We define the general Hill system and briefly analyze its dynamical behavior. A particular Hill system representing the interaction of a Keplerian binary system with a normally incident circularly polarized gravitational wave is discussed in detail. In this case, we compute the Poincar\'e-Melnikov function explicitly a... |
1109.5353 | Sanved Kolekar | Sanved Kolekar and T. Padmanabhan | Action principle for the Fluid-Gravity correspondence and emergent
gravity | v1: 12 Pages, No figure v2: refs added, discussion added, accepted in
Physical Review D | Phys.Rev.D85:024004,2011 | 10.1103/PhysRevD.85.024004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been known for a long time that Einstein's field equations when
projected onto a black hole horizon looks very similar to a Navier-Stokes
equation in suitable variables. More recently, it was shown that the projection
of Einstein's equation on to any null surface in any spacetime reduces exactly
to the Navier-... | [
{
"created": "Sun, 25 Sep 2011 12:42:26 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Dec 2011 10:53:03 GMT",
"version": "v2"
}
] | 2012-01-18 | [
[
"Kolekar",
"Sanved",
""
],
[
"Padmanabhan",
"T.",
""
]
] | It has been known for a long time that Einstein's field equations when projected onto a black hole horizon looks very similar to a Navier-Stokes equation in suitable variables. More recently, it was shown that the projection of Einstein's equation on to any null surface in any spacetime reduces exactly to the Navier-St... |
1210.3960 | Alok Laddha | Adam Henderson, Alok Laddha, casey Tomlin | Constraint algebra in LQG reloaded : Toy model of an Abelian gauge
theory - II Spatial Diffeomorphisms | 30 pages, 1 figure | Phys.Rev. D88 (2013) 4, 044029 | 10.1103/PhysRevD.88.044029 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In [1] we initiated an approach towards quantizing the Hamiltonian constraint
in Loop Quantum Gravity (LQG) by requiring that it generates an anomaly-free
representation of constraint algebra off-shell. We investigated this issue in
the case of a toy model of a 2+1-dimensional $U(1)^{3}$ gauge theory, which can
be th... | [
{
"created": "Mon, 15 Oct 2012 09:47:18 GMT",
"version": "v1"
}
] | 2014-11-13 | [
[
"Henderson",
"Adam",
""
],
[
"Laddha",
"Alok",
""
],
[
"Tomlin",
"casey",
""
]
] | In [1] we initiated an approach towards quantizing the Hamiltonian constraint in Loop Quantum Gravity (LQG) by requiring that it generates an anomaly-free representation of constraint algebra off-shell. We investigated this issue in the case of a toy model of a 2+1-dimensional $U(1)^{3}$ gauge theory, which can be thou... |
1804.10059 | Masaki Yamada | Heling Deng, Alexander Vilenkin, Masaki Yamada | CMB spectral distortions from black holes formed by vacuum bubbles | 27 pages, 6 figures; v2: Added a brief discussion of PBH effect on
structure formation | null | 10.1088/1475-7516/2018/07/059 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Vacuum bubbles may nucleate and expand during the cosmic inflation. When
inflation ends, the bubbles run into the ambient plasma, producing strong
shocks followed by underdensity waves, which propagate outwards. The bubbles
themselves eventually form black holes with a wide distribution of masses. It
has been recentl... | [
{
"created": "Thu, 26 Apr 2018 13:49:29 GMT",
"version": "v1"
},
{
"created": "Tue, 8 May 2018 20:40:00 GMT",
"version": "v2"
}
] | 2018-08-08 | [
[
"Deng",
"Heling",
""
],
[
"Vilenkin",
"Alexander",
""
],
[
"Yamada",
"Masaki",
""
]
] | Vacuum bubbles may nucleate and expand during the cosmic inflation. When inflation ends, the bubbles run into the ambient plasma, producing strong shocks followed by underdensity waves, which propagate outwards. The bubbles themselves eventually form black holes with a wide distribution of masses. It has been recently ... |
gr-qc/9710022 | Wieslaw Rudnicki | W. Rudnicki | Testing Cosmic Censorship in Kerr-like Collapse Situations | 6 pages, LaTeX 2.09 | Mod.Phys.Lett. A12 (1997) 2237-2242 | 10.1142/S0217732397002302 | null | gr-qc | null | According to the cosmic censorship hypothesis of Penrose, naked singularities
should never occur in realistic collapse situations. One of the major open
problems in this context is the existence of a naked singularity in the Kerr
solution with |a|>m; this singularity can be interpreted as the final product
of collaps... | [
{
"created": "Fri, 3 Oct 1997 11:25:24 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Rudnicki",
"W.",
""
]
] | According to the cosmic censorship hypothesis of Penrose, naked singularities should never occur in realistic collapse situations. One of the major open problems in this context is the existence of a naked singularity in the Kerr solution with |a|>m; this singularity can be interpreted as the final product of collapse ... |
1511.08663 | Alan Maciel | Alan Maciel | Quasilocal approach to general universal horizons | 10 pages, no figures. Corrections made. New analysis of gravitational
collapse in truncated HL theory. It matches version to appear in PRD | Phys. Rev. D 93, 104013 (2016) | 10.1103/PhysRevD.93.104013 | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Theories of gravity with a preferred foliation usually display arbitrarily
fast signal propagation, changing the black hole definition. A new inescapable
barrier, the universal horizon, has been defined and many static and
spherically symmetric examples have been studied in the literature. Here, we
translate the usua... | [
{
"created": "Fri, 27 Nov 2015 13:30:43 GMT",
"version": "v1"
},
{
"created": "Tue, 3 May 2016 19:27:19 GMT",
"version": "v2"
}
] | 2016-05-11 | [
[
"Maciel",
"Alan",
""
]
] | Theories of gravity with a preferred foliation usually display arbitrarily fast signal propagation, changing the black hole definition. A new inescapable barrier, the universal horizon, has been defined and many static and spherically symmetric examples have been studied in the literature. Here, we translate the usual ... |
2104.04260 | Timothy Clifton | Christopher S. Gallagher, Timothy Clifton, Chris Clarkson | Multi-Scale Perturbation Theory II: Solutions and Leading-Order
Bispectrum in the $\Lambda$CDM Universe | 21 pages, 10 figures | JCAP 08 (2021) 048 | 10.1088/1475-7516/2021/08/048 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two-parameter perturbation theory (2PPT) is a framework designed to include
the relativistic gravitational effects of small-scale nonlinear structures on
the large-scale properties of the Universe. In this paper we use the 2PPT
framework to calculate and study the bispectrum of matter in a spatially-flat
$\Lambda$CDM... | [
{
"created": "Fri, 9 Apr 2021 09:13:21 GMT",
"version": "v1"
},
{
"created": "Tue, 24 Aug 2021 08:29:26 GMT",
"version": "v2"
}
] | 2021-09-01 | [
[
"Gallagher",
"Christopher S.",
""
],
[
"Clifton",
"Timothy",
""
],
[
"Clarkson",
"Chris",
""
]
] | Two-parameter perturbation theory (2PPT) is a framework designed to include the relativistic gravitational effects of small-scale nonlinear structures on the large-scale properties of the Universe. In this paper we use the 2PPT framework to calculate and study the bispectrum of matter in a spatially-flat $\Lambda$CDM c... |
1405.7419 | M.P. Pierpoint | M.P. Pierpoint and F.V. Kusmartsev | Cosmic Expansion via Axion-Induced Quintessence | 18 pages, 11 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, dark energy is modelled via a spherically symmetric
quintessence scalar field $\varphi$, the dynamics of which are found to be
analogous to a pendulum. This is due to a driving axion potential
$V(\left|\varphi\right|)$, whose origins reside within the study of quantum
chromodynamics (QCD). The effect o... | [
{
"created": "Wed, 28 May 2014 23:21:19 GMT",
"version": "v1"
}
] | 2014-05-30 | [
[
"Pierpoint",
"M. P.",
""
],
[
"Kusmartsev",
"F. V.",
""
]
] | In this paper, dark energy is modelled via a spherically symmetric quintessence scalar field $\varphi$, the dynamics of which are found to be analogous to a pendulum. This is due to a driving axion potential $V(\left|\varphi\right|)$, whose origins reside within the study of quantum chromodynamics (QCD). The effect of ... |
gr-qc/0502054 | Gianluca Gemme | R. Ballantini, Ph. Bernard, S. Calatroni, E. Chiaveri, A. Chincarini,
R.P. Croce, S. Cuneo, V. Galdi, G. Gemme, R. Losito, R. Parodi, E. Picasso,
V. Pierro, I.M. Pinto, A. Podesta', R. Vaccarone | Microwave apparatus for gravitational waves observation | 42 pages, 28 figures | INFN Technical Note INFN/TC-05/05, (2005) | null | null | gr-qc | null | In this report the theoretical and experimental activities for the
development of superconducting microwave cavities for the detection of
gravitational waves are presented.
| [
{
"created": "Fri, 11 Feb 2005 13:14:38 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ballantini",
"R.",
""
],
[
"Bernard",
"Ph.",
""
],
[
"Calatroni",
"S.",
""
],
[
"Chiaveri",
"E.",
""
],
[
"Chincarini",
"A.",
""
],
[
"Croce",
"R. P.",
""
],
[
"Cuneo",
"S.",
""
],
[
"Galdi",
"... | In this report the theoretical and experimental activities for the development of superconducting microwave cavities for the detection of gravitational waves are presented. |
1812.07530 | Rhiannon Cuttell | Rhiannon Cuttell and Mairi Sakellariadou | The general scalar-tensor Hamiltonian with deformed covariance | 26 pages, 3 figures | null | 10.1088/1361-6382/ab1d80 | KCL-PH-TH/2018-79 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the scalar-tensor Hamiltonian constraint to all orders of momenta
when the canonical constraint algebra is deformed by a phase space function as
predicted by some studies into loop quantum cosmology. We find that the momenta
and spatial derivatives from gravity and matter fields must combine in a very
speci... | [
{
"created": "Tue, 18 Dec 2018 17:53:24 GMT",
"version": "v1"
}
] | 2019-09-04 | [
[
"Cuttell",
"Rhiannon",
""
],
[
"Sakellariadou",
"Mairi",
""
]
] | We derive the scalar-tensor Hamiltonian constraint to all orders of momenta when the canonical constraint algebra is deformed by a phase space function as predicted by some studies into loop quantum cosmology. We find that the momenta and spatial derivatives from gravity and matter fields must combine in a very specifi... |
2212.08005 | Sebasti\'an Bahamonde Dr | Sebastian Bahamonde, Georg Trenkler, Leonardo G. Trombetta, Masahide
Yamaguchi | Symmetric Teleparallel Horndeski Gravity | 35 pages. Matches published version in PRD | Phys. Rev. D 107 (2023), 104024 | 10.1103/PhysRevD.107.104024 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Horndeski gravity is the most general scalar-tensor theory with one scalar
field leading to second-order Euler-Lagrange field equations for the metric and
scalar field, and it is based on Riemannian geometry. In this paper, we
formulate an analogue version of Horndeski gravity in a symmetric teleparallel
geometry whi... | [
{
"created": "Thu, 15 Dec 2022 18:03:16 GMT",
"version": "v1"
},
{
"created": "Tue, 9 May 2023 15:52:14 GMT",
"version": "v2"
}
] | 2023-05-10 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Trenkler",
"Georg",
""
],
[
"Trombetta",
"Leonardo G.",
""
],
[
"Yamaguchi",
"Masahide",
""
]
] | Horndeski gravity is the most general scalar-tensor theory with one scalar field leading to second-order Euler-Lagrange field equations for the metric and scalar field, and it is based on Riemannian geometry. In this paper, we formulate an analogue version of Horndeski gravity in a symmetric teleparallel geometry which... |
1104.1223 | Thomas Sotiriou | Thomas P. Sotiriou, Matt Visser, Silke Weinfurtner | Comment on: Detecting Vanishing Dimensions Via Primordial Gravitational
Wave Astronomy | 1 page, comment to Phys. Rev. Lett. 106, 101101 (2011)
[arXiv:1102.3434] | Physical Review Letters 107 (2011) 169001 | 10.1103/PhysRevLett.107.169001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been recently claimed [arXiv:1102.3434] that quantum gravity models
where the number of dimensions reduces at the ultraviolet exhibit a potentially
observable cutoff in the primordial gravitational wave spectrum, and that this
is a "generic" and "robust" test for such models, since "(2+1)-dimensional
spacetime... | [
{
"created": "Thu, 7 Apr 2011 01:00:33 GMT",
"version": "v1"
}
] | 2011-10-18 | [
[
"Sotiriou",
"Thomas P.",
""
],
[
"Visser",
"Matt",
""
],
[
"Weinfurtner",
"Silke",
""
]
] | It has been recently claimed [arXiv:1102.3434] that quantum gravity models where the number of dimensions reduces at the ultraviolet exhibit a potentially observable cutoff in the primordial gravitational wave spectrum, and that this is a "generic" and "robust" test for such models, since "(2+1)-dimensional spacetimes ... |
1904.13290 | Hamed Barzegar | Hamed Barzegar, David Fajman, Gernot Hei{\ss}el | Isotropization of Slowly Expanding Spacetimes | Added references, argument in section 3 revised | Phys. Rev. D 101, 044046 (2020) | 10.1103/PhysRevD.101.044046 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the homogeneous, massless Einstein-Vlasov system with toroidal
spatial topology and diagonal Bianchi type I symmetry for initial data close to
isotropic data isotropizes towards the future and in particular asymptotes to a
radiative Einstein-deSitter model. We use an energy method to obtain
quantitative ... | [
{
"created": "Tue, 30 Apr 2019 14:53:50 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Nov 2019 21:56:52 GMT",
"version": "v2"
}
] | 2020-02-26 | [
[
"Barzegar",
"Hamed",
""
],
[
"Fajman",
"David",
""
],
[
"Heißel",
"Gernot",
""
]
] | We show that the homogeneous, massless Einstein-Vlasov system with toroidal spatial topology and diagonal Bianchi type I symmetry for initial data close to isotropic data isotropizes towards the future and in particular asymptotes to a radiative Einstein-deSitter model. We use an energy method to obtain quantitative es... |
gr-qc/0205011 | Raul Vera | Filipe C. Mena, Reza Tavakol, Ra\"ul Vera | Generalisation of the Einstein-Straus model to anisotropic settings | LaTeX, 24 pages. Text unchanged. Labels removed from the equations.
Submitted for publication | Phys.Rev. D66 (2002) 044004 | 10.1103/PhysRevD.66.044004 | null | gr-qc | null | We study the possibility of generalising the Einstein--Straus model to
anisotropic settings, by considering the matching of locally cylindrically
symmetric static regions to the set of $G_4$ on $S_3$ locally rotationally
symmetric (LRS) spacetimes. We show that such matchings preserving the symmetry
are only possible... | [
{
"created": "Thu, 2 May 2002 17:49:18 GMT",
"version": "v1"
},
{
"created": "Fri, 3 May 2002 13:28:46 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Mena",
"Filipe C.",
""
],
[
"Tavakol",
"Reza",
""
],
[
"Vera",
"Raül",
""
]
] | We study the possibility of generalising the Einstein--Straus model to anisotropic settings, by considering the matching of locally cylindrically symmetric static regions to the set of $G_4$ on $S_3$ locally rotationally symmetric (LRS) spacetimes. We show that such matchings preserving the symmetry are only possible f... |
gr-qc/0609034 | Martin Bojowald | Martin Bojowald | Loop quantum cosmology and inhomogeneities | 25 pages, 1 figure | Gen.Rel.Grav. 38 (2006) 1771-1795 | 10.1007/s10714-006-0348-4 | IGPG-06/8-1 | gr-qc | null | Inhomogeneities are introduced in loop quantum cosmology using regular
lattice states, with a kinematical arena similar to that in homogeneous models
considered earlier. The framework is intended to encapsulate crucial features
of background independent quantizations in a setting accessible to explicit
calculations o... | [
{
"created": "Fri, 8 Sep 2006 16:42:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bojowald",
"Martin",
""
]
] | Inhomogeneities are introduced in loop quantum cosmology using regular lattice states, with a kinematical arena similar to that in homogeneous models considered earlier. The framework is intended to encapsulate crucial features of background independent quantizations in a setting accessible to explicit calculations of ... |
1410.3677 | Gevorg Poghosyan | Gevorg Poghosyan, Sanchit Matta, Achim Streit, Micha{\l} Bejger,
Andrzej Kr\'olak | Architecture, implementation and parallelization of the software to
search for periodic gravitational wave signals | 11 pages, 9 figures. Submitted to Computer Physics Communications | Computer Physics Communications volume 188 pages 168 - 176 (2015) | 10.1016/j.cpc.2014.10.025 | null | gr-qc astro-ph.HE cs.DC cs.PF cs.SE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The parallelization, design and scalability of the \sky code to search for
periodic gravitational waves from rotating neutron stars is discussed. The code
is based on an efficient implementation of the F-statistic using the Fast
Fourier Transform algorithm. To perform an analysis of data from the advanced
LIGO and Vi... | [
{
"created": "Tue, 14 Oct 2014 13:15:38 GMT",
"version": "v1"
}
] | 2015-02-03 | [
[
"Poghosyan",
"Gevorg",
""
],
[
"Matta",
"Sanchit",
""
],
[
"Streit",
"Achim",
""
],
[
"Bejger",
"Michał",
""
],
[
"Królak",
"Andrzej",
""
]
] | The parallelization, design and scalability of the \sky code to search for periodic gravitational waves from rotating neutron stars is discussed. The code is based on an efficient implementation of the F-statistic using the Fast Fourier Transform algorithm. To perform an analysis of data from the advanced LIGO and Virg... |
gr-qc/0003107 | Valeri Frolov | V. Frolov and D. Singh | Quantum Radiation of a Uniformly Accelerated Refractive Body | 16 pages, 1 figure | Class.Quant.Grav.17:3905-3916,2000 | 10.1088/0264-9381/17/18/322 | Alberta-Thy-04-00 | gr-qc | null | We study quantum radiation generated by an accelerated motion of a small body
with a refractive index n which differes slightly from 1. To simplify
calculations we consider a model with a scalar massless field. We use the
perturbation expansion in a small parameter n-1 to obtain a correction to the
vacuum Hadamard fu... | [
{
"created": "Wed, 29 Mar 2000 19:30:34 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Frolov",
"V.",
""
],
[
"Singh",
"D.",
""
]
] | We study quantum radiation generated by an accelerated motion of a small body with a refractive index n which differes slightly from 1. To simplify calculations we consider a model with a scalar massless field. We use the perturbation expansion in a small parameter n-1 to obtain a correction to the vacuum Hadamard func... |
gr-qc/0404037 | Nail Khusnutdinov | S.V. Sushkov, S.-W. Kim | Cosmological evolution of a ghost scalar field | 8 pages | Gen.Rel.Grav.36:1671-1678,2004 | 10.1023/B:GERG.0000032159.46106.63 | null | gr-qc | null | We consider a scalar field with a negative kinetic term minimally coupled to
gravity. We obtain an exact non-static spherically symmetric solution which
describes a wormhole in cosmological setting. The wormhole is shown to connect
two homogeneous spatially flat universes expanding with acceleration. Depending
on the... | [
{
"created": "Thu, 8 Apr 2004 10:32:35 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Sushkov",
"S. V.",
""
],
[
"Kim",
"S. -W.",
""
]
] | We consider a scalar field with a negative kinetic term minimally coupled to gravity. We obtain an exact non-static spherically symmetric solution which describes a wormhole in cosmological setting. The wormhole is shown to connect two homogeneous spatially flat universes expanding with acceleration. Depending on the w... |
gr-qc/0607043 | Orfeu Bertolami | Orfeu Bertolami and Carla Carvalho | Lorentz Symmetry Derived from Lorentz Violation in the Bulk | 13 pages, revtex; version to appear in Physical Review D | Phys.Rev. D74 (2006) 084020 | 10.1103/PhysRevD.74.084020 | DF/IST-4.2006 | gr-qc astro-ph hep-ph hep-th | null | We consider bulk fields coupled to the graviton in a Lorentz violating
fashion. We expect that the overly tested Lorentz symmetry might set
constraints on the induced Lorentz violation in the brane, and hence on the
dynamics of the interaction of bulk fields on the brane. We also use the
requirement for Lorentz symme... | [
{
"created": "Tue, 11 Jul 2006 13:54:19 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Oct 2006 11:11:32 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Bertolami",
"Orfeu",
""
],
[
"Carvalho",
"Carla",
""
]
] | We consider bulk fields coupled to the graviton in a Lorentz violating fashion. We expect that the overly tested Lorentz symmetry might set constraints on the induced Lorentz violation in the brane, and hence on the dynamics of the interaction of bulk fields on the brane. We also use the requirement for Lorentz symmetr... |
2402.18694 | Ulrich Beckering Vinckers | Ulrich K. Beckering Vinckers, \'Alvaro de la Cruz-Dombriz, Anupam
Mazumdar | Smearing out contact terms in ghost-free infinite derivative quantum
gravity | 6 pages, no figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of ghost-free infinite derivative gravity we consider the
single graviton exchange either between two spinless particles or between a
spinless particle and a photon. To this end, we compute the gravitational
potential for both cases and derive the quantum correction that arises at the
linearized level.... | [
{
"created": "Wed, 28 Feb 2024 20:19:49 GMT",
"version": "v1"
}
] | 2024-03-01 | [
[
"Vinckers",
"Ulrich K. Beckering",
""
],
[
"de la Cruz-Dombriz",
"Álvaro",
""
],
[
"Mazumdar",
"Anupam",
""
]
] | In the context of ghost-free infinite derivative gravity we consider the single graviton exchange either between two spinless particles or between a spinless particle and a photon. To this end, we compute the gravitational potential for both cases and derive the quantum correction that arises at the linearized level. I... |
0705.4012 | Hiromi Saida | Hiromi Saida, Tomohiro Harada and Hideki Maeda | Black Hole Evaporation in an Expanding Universe | Accepted for publication in Class.Quant.Grav., 18 pages and 3 figures | Class.Quant.Grav.24:4711-4732,2007 | 10.1088/0264-9381/24/18/011 | CECS-PHY-07/08 | gr-qc astro-ph hep-th | null | We calculate the quantum radiation power of black holes which are asymptotic
to the Einstein-de Sitter universe at spatial and null infinities. We consider
two limiting mass accretion scenarios, no accretion and significant accretion.
We find that the radiation power strongly depends on not only the asymptotic
condit... | [
{
"created": "Mon, 28 May 2007 07:51:43 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Aug 2007 07:07:20 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Saida",
"Hiromi",
""
],
[
"Harada",
"Tomohiro",
""
],
[
"Maeda",
"Hideki",
""
]
] | We calculate the quantum radiation power of black holes which are asymptotic to the Einstein-de Sitter universe at spatial and null infinities. We consider two limiting mass accretion scenarios, no accretion and significant accretion. We find that the radiation power strongly depends on not only the asymptotic conditio... |
1608.00267 | Quentin G. Bailey | Quentin G. Bailey | Anisotropic cubic curvature couplings | 11 pages | Phys. Rev. D 94, 065029 (2016) | 10.1103/PhysRevD.94.065029 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To complement recent work on tests of spacetime symmetry in gravity, cubic
curvature couplings are studied using an effective field theory description of
spacetime-symmetry breaking. The associated mass dimension 8 coefficients for
Lorentz violation studied do not result in any linearized gravity modifications
and in... | [
{
"created": "Sun, 31 Jul 2016 21:49:41 GMT",
"version": "v1"
}
] | 2016-09-28 | [
[
"Bailey",
"Quentin G.",
""
]
] | To complement recent work on tests of spacetime symmetry in gravity, cubic curvature couplings are studied using an effective field theory description of spacetime-symmetry breaking. The associated mass dimension 8 coefficients for Lorentz violation studied do not result in any linearized gravity modifications and inst... |
1904.04103 | Paul Kinsler | Jonathan Gratus, Paul Kinsler, Martin W. McCall | Evaporating black-holes, wormholes, and vacuum polarisation: must they
always conserve charge? | 11 pages, 9 figures (v2 adds a popular summary) | Found. Phys. 49, (2019) [published online April 4] | 10.1007/s10701-019-00251-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A careful examination of the fundamentals of electromagnetic theory shows
that due to the underlying mathematical assumptions required for Stokes'
Theorem, global charge conservation cannot be guaranteed in topologically
non-trivial spacetimes. However, in order to break the charge conservation
mechanism we must also... | [
{
"created": "Mon, 8 Apr 2019 14:52:10 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Mar 2022 16:09:42 GMT",
"version": "v2"
}
] | 2022-03-17 | [
[
"Gratus",
"Jonathan",
""
],
[
"Kinsler",
"Paul",
""
],
[
"McCall",
"Martin W.",
""
]
] | A careful examination of the fundamentals of electromagnetic theory shows that due to the underlying mathematical assumptions required for Stokes' Theorem, global charge conservation cannot be guaranteed in topologically non-trivial spacetimes. However, in order to break the charge conservation mechanism we must also a... |
1407.6428 | Jaedong Choi | Jaedong Choi | The warped product approach to magnetically charged GMGHS spacetime | 12 pages, 4 figures | null | 10.1142/S0217732314501983 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of Lorentzian multiply warped products we study the
magnetically charged Gibbons-Maeda-Garfinkle-Horowitz-Strominger (GMGHS)
interior spacetime in the string frame. We also investigate geodesic motion in
various hypersurfaces, and compare their solutions of geodesic equations with
the ones obtained i... | [
{
"created": "Thu, 24 Jul 2014 02:23:50 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Choi",
"Jaedong",
""
]
] | In the framework of Lorentzian multiply warped products we study the magnetically charged Gibbons-Maeda-Garfinkle-Horowitz-Strominger (GMGHS) interior spacetime in the string frame. We also investigate geodesic motion in various hypersurfaces, and compare their solutions of geodesic equations with the ones obtained in ... |
2106.03256 | Serge Repin Mr. | Mikhail A. Bugaev, Igor D. Novikov, Serge V. Repin and Anna A.
Shelkovnikova | Gravitational lensing and wormhole shadows | 12 pages, 12 figures | Astronomy Reports, vol. 65, issue 12, pp. 1185-1193 (2021) | 10.1134/S1063772921120027 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | The problem of bending and scattering of light rays passing outside from the
entrance to a wormhole with zero gravitational mass is considered. The process
of ray capture by a wormhole as well as the process of formation of a shadow
when illuminated by a standard screen is investigated. These mechanisms are
also comp... | [
{
"created": "Sun, 6 Jun 2021 21:41:23 GMT",
"version": "v1"
}
] | 2022-01-07 | [
[
"Bugaev",
"Mikhail A.",
""
],
[
"Novikov",
"Igor D.",
""
],
[
"Repin",
"Serge V.",
""
],
[
"Shelkovnikova",
"Anna A.",
""
]
] | The problem of bending and scattering of light rays passing outside from the entrance to a wormhole with zero gravitational mass is considered. The process of ray capture by a wormhole as well as the process of formation of a shadow when illuminated by a standard screen is investigated. These mechanisms are also compar... |
gr-qc/9909057 | Kuiroukidis | A. Kuiroukidis and D. B. Papadopoulos | Strings in Kerr-Newmann Black Holes | 14 pages, no figures, LaTeX. To appear in Gen. Rel. Grav | Gen.Rel.Grav. 32 (2000) 593-606 | 10.1023/A:1001906916522 | null | gr-qc | null | We study the evolution of strings in the equatorial plane of a Kerr-Newmann
black hole. Writting the equations of motion and the constraints resulting from
Hamilton's principle, three classes of exact solutions are presented, for a
closed string, encircling the black hole. They all depend on two arbitrary
integration... | [
{
"created": "Mon, 20 Sep 1999 07:41:09 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Sep 1999 11:16:31 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Kuiroukidis",
"A.",
""
],
[
"Papadopoulos",
"D. B.",
""
]
] | We study the evolution of strings in the equatorial plane of a Kerr-Newmann black hole. Writting the equations of motion and the constraints resulting from Hamilton's principle, three classes of exact solutions are presented, for a closed string, encircling the black hole. They all depend on two arbitrary integration f... |
1204.5085 | Frans Klinkhamer | V. Emelyanov, F. R. Klinkhamer | De-Sitter-spacetime instability from a nonstandard vector field | 10 pages, v7: published version | Phys. Rev. D 86, 027302 (2012) | 10.1103/PhysRevD.86.027302 | KA-TP-16-2012 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is found that de-Sitter spacetime, the constant-curvature matter-free
solution of the Einstein equations with a positive cosmological constant,
becomes classically unstable due to the dynamic effects of a certain type of
vector field (fundamentally different from a gauge field). The perturbed
de-Sitter universe ev... | [
{
"created": "Mon, 23 Apr 2012 15:26:54 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Apr 2012 18:02:14 GMT",
"version": "v2"
},
{
"created": "Thu, 3 May 2012 17:55:49 GMT",
"version": "v3"
},
{
"created": "Wed, 9 May 2012 17:36:22 GMT",
"version": "v4"
},
{
"cre... | 2015-06-04 | [
[
"Emelyanov",
"V.",
""
],
[
"Klinkhamer",
"F. R.",
""
]
] | It is found that de-Sitter spacetime, the constant-curvature matter-free solution of the Einstein equations with a positive cosmological constant, becomes classically unstable due to the dynamic effects of a certain type of vector field (fundamentally different from a gauge field). The perturbed de-Sitter universe evol... |
gr-qc/0610128 | Mark Hannam | Bernd Bruegmann, Jose A. Gonzalez, Mark Hannam, Sascha Husa, Ulrich
Sperhake, Wolfgang Tichy | Calibration of Moving Puncture Simulations | 21 pages, 21 figures, three tables | Phys.Rev.D77:024027,2008 | 10.1103/PhysRevD.77.024027 | null | gr-qc | null | We present single and binary black hole simulations that follow the moving
puncture paradigm of simulating black-hole spacetimes without excision, and use
moving boxes mesh refinement. Focussing on binary black hole configurations
where the simulations cover roughly two orbits, we address five major issues
determinin... | [
{
"created": "Thu, 26 Oct 2006 17:23:13 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Bruegmann",
"Bernd",
""
],
[
"Gonzalez",
"Jose A.",
""
],
[
"Hannam",
"Mark",
""
],
[
"Husa",
"Sascha",
""
],
[
"Sperhake",
"Ulrich",
""
],
[
"Tichy",
"Wolfgang",
""
]
] | We present single and binary black hole simulations that follow the moving puncture paradigm of simulating black-hole spacetimes without excision, and use moving boxes mesh refinement. Focussing on binary black hole configurations where the simulations cover roughly two orbits, we address five major issues determining ... |
1309.6075 | Albert V. Minkevich | A.V.Minkevich | On theory of regular accelerating Universe in Riemann-Cartan spacetime | null | Modern Physics Letters A Vol.28, No.21(2013) 1350090 | 10.1142/S0217732313500909 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Isotropic cosmology built in the Riemann-Cartan spacetime is investigated.
Properties of homogeneous isotropic cosmological models filled with usual
gravitating matter and scalar fields are studied in the beginning of
cosmological expansion near the limiting energy density. It is shown that
cosmological models are re... | [
{
"created": "Tue, 24 Sep 2013 08:17:23 GMT",
"version": "v1"
}
] | 2013-09-25 | [
[
"Minkevich",
"A. V.",
""
]
] | Isotropic cosmology built in the Riemann-Cartan spacetime is investigated. Properties of homogeneous isotropic cosmological models filled with usual gravitating matter and scalar fields are studied in the beginning of cosmological expansion near the limiting energy density. It is shown that cosmological models are regu... |
1304.6982 | Mauricio Bellini | Jos\'e Edgar Madriz Aguilar, Luz Marina Reyes, Claudia Moreno (CUCEI -
Guadalajara University), Mauricio Bellini (IFIMAR - Mar del Plata University
& CONICET) | Scalar fluctuations of the scalar metric during inflation from a
non-perturbative 5D large-scale repulsive gravity model | Final version to be published in EPJC | null | 10.1140/epjc/s10052-013-2598-0 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a non-perturbative formalism for scalar metric fluctuations from a
5D extended version of general relativity in vacuum. In this work we
concentrate our efforts on calculations valid on large cosmological scales,
which are the dominant during the inflationary phase of the universe. The
resulting metric in t... | [
{
"created": "Thu, 25 Apr 2013 19:22:47 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Aug 2013 23:11:35 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Oct 2013 15:16:53 GMT",
"version": "v3"
},
{
"created": "Thu, 10 Oct 2013 15:22:06 GMT",
"version": "v4"
}
] | 2015-06-15 | [
[
"Aguilar",
"José Edgar Madriz",
"",
"CUCEI -\n Guadalajara University"
],
[
"Reyes",
"Luz Marina",
"",
"CUCEI -\n Guadalajara University"
],
[
"Moreno",
"Claudia",
"",
"CUCEI -\n Guadalajara University"
],
[
"Bellini",
"Mauricio",
"",
... | We develop a non-perturbative formalism for scalar metric fluctuations from a 5D extended version of general relativity in vacuum. In this work we concentrate our efforts on calculations valid on large cosmological scales, which are the dominant during the inflationary phase of the universe. The resulting metric in thi... |
2207.08196 | Vaclav Vavrycuk | Vaclav Vavrycuk | Gravitational orbits in the expanding universe revisited | 17 pages, 9 figures | Front. Astron. Space Sci. 10: 1071743, 2023 | 10.3389/fspas.2023.1071743 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Modified Newtonian equations for gravitational orbits in the expanding
universe indicate that local gravitationally bounded systems like galaxies and
planetary systems are unaffected by the expansion of the Universe. This result
is derived under the assumption of the space expansion described by the
standard FLRW met... | [
{
"created": "Sun, 17 Jul 2022 14:58:33 GMT",
"version": "v1"
}
] | 2023-02-07 | [
[
"Vavrycuk",
"Vaclav",
""
]
] | Modified Newtonian equations for gravitational orbits in the expanding universe indicate that local gravitationally bounded systems like galaxies and planetary systems are unaffected by the expansion of the Universe. This result is derived under the assumption of the space expansion described by the standard FLRW metri... |
gr-qc/0412088 | Salvatore Capozziello | Salvatore Capozziello | Newtonian limit of Extended Theories of Gravity | 42 pages, 1 figure | to appera in Progress in General Relativity and Quantum Cosmology,
Nova Science Eds. 2004 | null | null | gr-qc | null | Newtonian limit of Extended Theories of Gravity (in particular, higher--order
and scalar--tensor theories) is theoretically discussed taking into account
recent observational and experimental results.
| [
{
"created": "Fri, 17 Dec 2004 21:32:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Capozziello",
"Salvatore",
""
]
] | Newtonian limit of Extended Theories of Gravity (in particular, higher--order and scalar--tensor theories) is theoretically discussed taking into account recent observational and experimental results. |
1005.1807 | Shailesh Kulkarni | Sashideep Gutti, Shailesh Kulkarni and L. Sriramkumar | Modified dispersion relations and the response of the rotating
Unruh-DeWitt detector | V1: 11 pages, 3 figures; V2: 12 pages, 3 figures, considerably
revised, we now calculate the detector response exactly; V3: 14 pages, 3
figures, minor changes, to appear in Phys. Rev. D | Phys.Rev.D83:064011,2011 | 10.1103/PhysRevD.83.064011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the response of a rotating monopole detector that is coupled to a
massless scalar field which is described by a non-linear dispersion relation in
flat spacetime. Since it does not seem to be possible to evaluate the response
of the rotating detector analytically, we resort to numerical computations.
Interest... | [
{
"created": "Tue, 11 May 2010 11:54:19 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Sep 2010 17:16:46 GMT",
"version": "v2"
},
{
"created": "Mon, 7 Mar 2011 06:42:16 GMT",
"version": "v3"
}
] | 2011-03-22 | [
[
"Gutti",
"Sashideep",
""
],
[
"Kulkarni",
"Shailesh",
""
],
[
"Sriramkumar",
"L.",
""
]
] | We study the response of a rotating monopole detector that is coupled to a massless scalar field which is described by a non-linear dispersion relation in flat spacetime. Since it does not seem to be possible to evaluate the response of the rotating detector analytically, we resort to numerical computations. Interestin... |
0903.2279 | Michael Seifert | Michael D. Seifert | Vector models of gravitational Lorentz symmetry breaking | 12 pages, RevTeX format. v2: fixed typos, added footnotes to match
PRD version | Phys. Rev. D 79, 124012 (2009) | 10.1103/PhysRevD.79.124012 | IUHET 526 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spontaneous Lorentz symmetry breaking can occur when the dynamics of a tensor
field cause it to take on a non-zero expectation value in vacuo, thereby
providing one or more "preferred directions" in spacetime. Couplings between
such fields and spacetime curvature will then affect the dynamics of the
metric, leading t... | [
{
"created": "Thu, 12 Mar 2009 21:38:47 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Jun 2009 19:10:27 GMT",
"version": "v2"
}
] | 2009-08-19 | [
[
"Seifert",
"Michael D.",
""
]
] | Spontaneous Lorentz symmetry breaking can occur when the dynamics of a tensor field cause it to take on a non-zero expectation value in vacuo, thereby providing one or more "preferred directions" in spacetime. Couplings between such fields and spacetime curvature will then affect the dynamics of the metric, leading to ... |
2104.03789 | Wen-Biao Han | Qianyun Yun, Wen-Biao Han, Xingyu Zhong, Carlos A. Benavides-Gallego | A surrogate model for gravitational waveforms of spin-aligned binary
black holes with eccentricities | 18pages, 23 figures | Phys. Rev. D 103, 124053 (2021) | 10.1103/PhysRevD.103.124053 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A waveform model for the eccentric binary black holes named SEOBNRE has been
used to analyze the LIGO-Virgo's gravitational wave data by several groups. The
accuracy of this model has been validated by comparing it with numerical
relativity. However, SEOBNRE is a time-domain model, and the efficiency for
generating w... | [
{
"created": "Thu, 8 Apr 2021 14:14:23 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Jun 2021 10:40:29 GMT",
"version": "v2"
}
] | 2021-06-29 | [
[
"Yun",
"Qianyun",
""
],
[
"Han",
"Wen-Biao",
""
],
[
"Zhong",
"Xingyu",
""
],
[
"Benavides-Gallego",
"Carlos A.",
""
]
] | A waveform model for the eccentric binary black holes named SEOBNRE has been used to analyze the LIGO-Virgo's gravitational wave data by several groups. The accuracy of this model has been validated by comparing it with numerical relativity. However, SEOBNRE is a time-domain model, and the efficiency for generating wav... |
2112.12807 | Mehedi Kalam Prof. | Sajahan Molla, Masum Murshid and Mehedi Kalam | Analytical model on mass limit of strange stars | 12 pages, 10 figures, 2 tables; Accepted in Astrophysics and Space
Science | null | 10.1007/s10509-021-04035-0 | null | gr-qc astro-ph.HE nucl-th | http://creativecommons.org/publicdomain/zero/1.0/ | In this paper, we present a new kind of stellar model using the Nariai IV
metric. This model can be used to study the strange/quark stars(which is our
present interest, though it can also be applicable to neutron stars). We
present a mass-radius region where all the regularity conditions, energy
conditions, the TOV e... | [
{
"created": "Wed, 22 Dec 2021 16:24:48 GMT",
"version": "v1"
}
] | 2022-01-19 | [
[
"Molla",
"Sajahan",
""
],
[
"Murshid",
"Masum",
""
],
[
"Kalam",
"Mehedi",
""
]
] | In this paper, we present a new kind of stellar model using the Nariai IV metric. This model can be used to study the strange/quark stars(which is our present interest, though it can also be applicable to neutron stars). We present a mass-radius region where all the regularity conditions, energy conditions, the TOV equ... |
2407.06393 | Sara Saghafi | Kourosh Nozari, Sara Saghafi and Ali Mohammadpour | Higher-Dimensional MOG dark compact object: shadow behavior in the light
of EHT observations | 24 pages, 7 figures, 2 tables. arXiv admin note: text overlap with
arXiv:2305.17237 | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Consideration of extra spatial dimensions is motivated by the unification of
gravity with other interactions, the achievement of the ultimate framework of
quantum gravity, and fundamental problems in particle physics and cosmology.
Much attention has been focused on the effect of these extra dimensions on the
modifie... | [
{
"created": "Mon, 8 Jul 2024 21:06:31 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jul 2024 19:32:13 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Jul 2024 11:06:18 GMT",
"version": "v3"
}
] | 2024-07-16 | [
[
"Nozari",
"Kourosh",
""
],
[
"Saghafi",
"Sara",
""
],
[
"Mohammadpour",
"Ali",
""
]
] | Consideration of extra spatial dimensions is motivated by the unification of gravity with other interactions, the achievement of the ultimate framework of quantum gravity, and fundamental problems in particle physics and cosmology. Much attention has been focused on the effect of these extra dimensions on the modified ... |
1107.5984 | Alessandro D.A.M. Spallicci di Filottrano | Alessandro D.A.M. Spallicci | On the complementarity of pulsar timing and space laser interferometry
for the individual detection of supermassive black hole binaries | To appear in the Astrophysical Journal | Final version in Astrophys. J., 764,187 (2013) | 10.1088/0004-637X/764/2/187 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves coming from Super Massive Black Hole Binaries (SMBHBs)
are targeted by both Pulsar Timing Array (PTA) and Space Laser Interferometry
(SLI). The possibility of a single SMBHB being tracked first by PTA, through
inspiral, and later by SLI, up to merger and ring down, has been previously
suggested. A... | [
{
"created": "Fri, 29 Jul 2011 14:40:01 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Sep 2012 09:55:24 GMT",
"version": "v2"
},
{
"created": "Sat, 19 Jan 2013 11:45:58 GMT",
"version": "v3"
}
] | 2013-02-12 | [
[
"Spallicci",
"Alessandro D. A. M.",
""
]
] | Gravitational waves coming from Super Massive Black Hole Binaries (SMBHBs) are targeted by both Pulsar Timing Array (PTA) and Space Laser Interferometry (SLI). The possibility of a single SMBHB being tracked first by PTA, through inspiral, and later by SLI, up to merger and ring down, has been previously suggested. Alt... |
gr-qc/9508033 | null | J. Greensite | Field Theory as Free Fall | 18 pages, plain latex | Class.Quant.Grav. 13 (1996) 1339-1352 | 10.1088/0264-9381/13/6/009 | NBI-HE-95-24 | gr-qc hep-th | null | It is shown that the classical field equations pertaining to gravity coupled
to other bosonic fields are equivalent to a single geodesic equation,
describing the free fall of a point particle in superspace. Some implications
for quantum gravity are discussed.
| [
{
"created": "Mon, 14 Aug 1995 17:57:38 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Greensite",
"J.",
""
]
] | It is shown that the classical field equations pertaining to gravity coupled to other bosonic fields are equivalent to a single geodesic equation, describing the free fall of a point particle in superspace. Some implications for quantum gravity are discussed. |
2203.01234 | Nihan Kat{\i}rc{\i} Dr. | Giovanni Acquaviva, Nihan Katirci | Dynamical analysis of logarithmic energy-momentum squared gravity | 12 pages, 4 figures, 1 table | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform the dynamical system analysis of a cosmological model in the
energy-momentum squared gravity (EMSG) of the form
$f(T_{\mu\nu}T^{\mu\nu})=\alpha\ln({\lambda}T_{\mu\nu} T^{\mu\nu})$, which is
known as energy-momentum log gravity (EMLG). In particular, we show that the
analytical cosmological solution of EMLG... | [
{
"created": "Wed, 2 Mar 2022 16:57:24 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Mar 2022 19:14:53 GMT",
"version": "v2"
}
] | 2022-03-17 | [
[
"Acquaviva",
"Giovanni",
""
],
[
"Katirci",
"Nihan",
""
]
] | We perform the dynamical system analysis of a cosmological model in the energy-momentum squared gravity (EMSG) of the form $f(T_{\mu\nu}T^{\mu\nu})=\alpha\ln({\lambda}T_{\mu\nu} T^{\mu\nu})$, which is known as energy-momentum log gravity (EMLG). In particular, we show that the analytical cosmological solution of EMLG p... |
gr-qc/0304002 | Dr Henk van Elst | Claes Uggla (University of Karlstad), Henk van Elst (Queen Mary,
University of London), John Wainwright (University of Waterloo), George F R
Ellis (University of Cape Town) | The past attractor in inhomogeneous cosmology | 31 pages, 10 *.ps figures, 3 tables, LaTeX2e (10pt), submitted for
publication to Physical Review D | Phys.Rev. D68 (2003) 103502 | 10.1103/PhysRevD.68.103502 | QMUL-AU-2003-001, uct-cosmology-03/01 | gr-qc astro-ph math-ph math.MP | null | We present a general framework for analyzing spatially inhomogeneous
cosmological dynamics. It employs Hubble-normalized scale-invariant variables
which are defined within the orthonormal frame formalism, and leads to the
formulation of Einstein's field equations with a perfect fluid matter source as
an autonomous sy... | [
{
"created": "Tue, 1 Apr 2003 10:23:49 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Uggla",
"Claes",
"",
"University of Karlstad"
],
[
"van Elst",
"Henk",
"",
"Queen Mary,\n University of London"
],
[
"Wainwright",
"John",
"",
"University of Waterloo"
],
[
"Ellis",
"George F R",
"",
"University of Cape Town"
]
] | We present a general framework for analyzing spatially inhomogeneous cosmological dynamics. It employs Hubble-normalized scale-invariant variables which are defined within the orthonormal frame formalism, and leads to the formulation of Einstein's field equations with a perfect fluid matter source as an autonomous syst... |
1512.00615 | Jan {\O}ye Lindroos mr | Jan {\O}. Lindroos, Claudio Llinares, David F. Mota | Wave Propagation in Modified Gravity | null | Phys. Rev. D 93, 044050 (2016) | 10.1103/PhysRevD.93.044050 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the propagation of scalar waves induced by matter sources in
the context of scalar-tensor theories of gravity which include screening
mechanisms for the scalar degree of freedom. The usual approach when studying
these theories in the non-linear regime of cosmological perturbations is based
on the assum... | [
{
"created": "Wed, 2 Dec 2015 09:02:52 GMT",
"version": "v1"
},
{
"created": "Sun, 17 Jan 2016 21:37:34 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Feb 2016 13:46:39 GMT",
"version": "v3"
},
{
"created": "Fri, 19 Feb 2016 07:53:05 GMT",
"version": "v4"
}
] | 2016-02-24 | [
[
"Lindroos",
"Jan Ø.",
""
],
[
"Llinares",
"Claudio",
""
],
[
"Mota",
"David F.",
""
]
] | We investigate the propagation of scalar waves induced by matter sources in the context of scalar-tensor theories of gravity which include screening mechanisms for the scalar degree of freedom. The usual approach when studying these theories in the non-linear regime of cosmological perturbations is based on the assumpt... |
gr-qc/9308012 | Jeff Greensite | A. Carlini and J. Greensite | Why is Spacetime Lorentzian? | 26 pages, plain LaTeX, NBI-HE-93-37 | Phys.Rev. D49 (1994) 866-878 | 10.1103/PhysRevD.49.866 | null | gr-qc hep-th | null | We expand on the idea that spacetime signature should be treated as a
dynamical degree of freedom in quantum field theory. It has been argued that
the probability distribution for signature, induced by massless free fields, is
peaked at the Lorentzian value uniquely in D=4 dimensions. This argument is
reviewed, and c... | [
{
"created": "Thu, 12 Aug 1993 12:19:22 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Carlini",
"A.",
""
],
[
"Greensite",
"J.",
""
]
] | We expand on the idea that spacetime signature should be treated as a dynamical degree of freedom in quantum field theory. It has been argued that the probability distribution for signature, induced by massless free fields, is peaked at the Lorentzian value uniquely in D=4 dimensions. This argument is reviewed, and cer... |
gr-qc/0102001 | Savitskaja Tat'jana Nikolaevna | S.N. Vergeles | Canonical quantization of two-dimensional gravity | 26 pages, LaTex | Sov.Phys. JETP (2000) 117 | null | null | gr-qc | null | A canonical quantization of two-dimensional gravity minimally coupled to real
scalar and spinor Majorana fields is presented. The physical state space of the
theory is completely described and calculations are also made of the average
value of the metric tensor relative to states close to the ground state
| [
{
"created": "Thu, 1 Feb 2001 10:34:12 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Vergeles",
"S. N.",
""
]
] | A canonical quantization of two-dimensional gravity minimally coupled to real scalar and spinor Majorana fields is presented. The physical state space of the theory is completely described and calculations are also made of the average value of the metric tensor relative to states close to the ground state |
2301.08126 | Stavros Venikoudis | Achilles Gitsis (Aristotle U., Thessaloniki), Konstantinos-Rafail
Revis (Aristotle U., Thessaloniki), S. A. Venikoudis (Aristotle U.,
Thessaloniki), F. P. Fronimos (Aristotle U., Thessaloniki) | Swampland criteria for rescaled Einstein-Hilbert gravity with string
corrections | null | null | null | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work we examine the Swampland criteria for a specific class of
rescaled $f(R)$ gravitational models, that are capable of unifying the
primordial era of the Universe with the late-time era with the inclusion of
string corrections. In particular, we develop separately the theoretical
framework of Gauss-Bonnet a... | [
{
"created": "Thu, 19 Jan 2023 15:39:29 GMT",
"version": "v1"
}
] | 2023-01-20 | [
[
"Gitsis",
"Achilles",
"",
"Aristotle U., Thessaloniki"
],
[
"Revis",
"Konstantinos-Rafail",
"",
"Aristotle U., Thessaloniki"
],
[
"Venikoudis",
"S. A.",
"",
"Aristotle U.,\n Thessaloniki"
],
[
"Fronimos",
"F. P.",
"",
"Aristotle U., Thes... | In this work we examine the Swampland criteria for a specific class of rescaled $f(R)$ gravitational models, that are capable of unifying the primordial era of the Universe with the late-time era with the inclusion of string corrections. In particular, we develop separately the theoretical framework of Gauss-Bonnet and... |
2307.05860 | Francois Larrouturou | Quentin Henry and Fran\c{c}ois Larrouturou | Conservative (failed)-tail effects at the fifth post-Newtonian order | 8 pages. v2: local report number added, harmless typo corrected in
Eq. (3.8); v3 : post-referee version | Phys. Rev. D 108, 084048 (2023) | 10.1103/PhysRevD.108.084048 | DESY-23-100 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | This work deals with the tail and ``failed'' tail sectors of the conservative
dynamics for compact binary systems at the 5PN order. We employ the Fokker
Lagrangian method with dimensional regularization, and our results for the tail
sector are perfectly consistent with the previous EFT computations. As for the
``fail... | [
{
"created": "Wed, 12 Jul 2023 00:52:43 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jul 2023 08:43:30 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Oct 2023 17:05:41 GMT",
"version": "v3"
}
] | 2023-10-24 | [
[
"Henry",
"Quentin",
""
],
[
"Larrouturou",
"François",
""
]
] | This work deals with the tail and ``failed'' tail sectors of the conservative dynamics for compact binary systems at the 5PN order. We employ the Fokker Lagrangian method with dimensional regularization, and our results for the tail sector are perfectly consistent with the previous EFT computations. As for the ``failed... |
gr-qc/0006055 | J. Alberto Lobo | J. Alberto Lobo | Multimode gravitational wave detection: the spherical detector theory | 57 pages, 11 figures, LaTeX2e; \usepackage{graphicx,deleq}. One more
figure added. MAIN reason for replacement: This file had TWO journal
references, thereby causing citation conflicts. No journal reference is now
included, but see gr-qc/0006102 and gr-qc/0006109 | null | null | null | gr-qc astro-ph hep-ex | null | A spherical gravity wave (GW) detector, unlike interferometers and bars, is a
natural multi-mode device, i.e., it is capable of independently gathering
information on all five quadrupole and one monopole amplitudes of a general
incoming GW. This is because the sphere's degenerate oscillation eigenmodes are
uniquely m... | [
{
"created": "Thu, 15 Jun 2000 14:02:27 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Jul 2000 16:19:55 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Lobo",
"J. Alberto",
""
]
] | A spherical gravity wave (GW) detector, unlike interferometers and bars, is a natural multi-mode device, i.e., it is capable of independently gathering information on all five quadrupole and one monopole amplitudes of a general incoming GW. This is because the sphere's degenerate oscillation eigenmodes are uniquely mat... |
1207.0275 | Jan Harms | Jennifer C. Driggers and Jan Harms and Rana X. Adhikari | Subtraction of Newtonian Noise Using Optimized Sensor Arrays | 29 pages, 11 figures | Physical Review D 86, 102001 (2012) | 10.1103/PhysRevD.86.102001 | LIGO-P1200017 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Fluctuations in the local Newtonian gravitational field present a limit to
high precision measurements, including searches for gravitational waves using
laser interferometers. In this work, we present a model of this perturbing
gravitational field and evaluate schemes to mitigate the effect by estimating
and subtract... | [
{
"created": "Mon, 2 Jul 2012 03:44:35 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Oct 2012 06:02:45 GMT",
"version": "v2"
},
{
"created": "Sat, 5 Jan 2013 11:13:33 GMT",
"version": "v3"
}
] | 2013-05-21 | [
[
"Driggers",
"Jennifer C.",
""
],
[
"Harms",
"Jan",
""
],
[
"Adhikari",
"Rana X.",
""
]
] | Fluctuations in the local Newtonian gravitational field present a limit to high precision measurements, including searches for gravitational waves using laser interferometers. In this work, we present a model of this perturbing gravitational field and evaluate schemes to mitigate the effect by estimating and subtractin... |
2206.13661 | Miguel Duarte | Miguel Duarte, Edgar Gasper\'in, Justin C. Feng, David Hilditch | Regularizing Dual-Frame Generalized Harmonic Gauge at Null Infinity | 20 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dual-frame formalism leads to an approach to extend numerical relativity
simulations in generalized harmonic gauge (GHG) all the way to null infinity. A
major setback is that without care, even simple choices of initial data give
rise to logarithmically divergent terms that would result in irregular
variables and... | [
{
"created": "Mon, 27 Jun 2022 23:05:31 GMT",
"version": "v1"
}
] | 2022-06-29 | [
[
"Duarte",
"Miguel",
""
],
[
"Gasperín",
"Edgar",
""
],
[
"Feng",
"Justin C.",
""
],
[
"Hilditch",
"David",
""
]
] | The dual-frame formalism leads to an approach to extend numerical relativity simulations in generalized harmonic gauge (GHG) all the way to null infinity. A major setback is that without care, even simple choices of initial data give rise to logarithmically divergent terms that would result in irregular variables and e... |
2008.01587 | S Habib Mazharimousavi | S. Habib Mazharimousavi and M. Halilsoy | $n+1$-dimensional Bertotti-Robinson solutions in gravity coupled with
nonlinear electrodynamics | 6 pages, no figure. Final copy published in Classical and Quantum
Gravity | null | 10.1088/1361-6382/aba222 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the pure electric type power-law Lagrangian in nonlinear
electrodynamics theory of dimensions $n+1$. Conformally flat form of
Bertotti-Robinson type spacetimes are obtained in all these dimensions with the
specific power $s=-\frac{1}{n-4},$which naturally excludes $n=4.$ This
particular dimension is consi... | [
{
"created": "Mon, 3 Aug 2020 15:58:20 GMT",
"version": "v1"
}
] | 2020-08-05 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
]
] | We consider the pure electric type power-law Lagrangian in nonlinear electrodynamics theory of dimensions $n+1$. Conformally flat form of Bertotti-Robinson type spacetimes are obtained in all these dimensions with the specific power $s=-\frac{1}{n-4},$which naturally excludes $n=4.$ This particular dimension is conside... |
1605.06656 | Dah-Wei Chiou | Dah-Wei Chiou | Response of the Unruh-DeWitt detector in flat spacetime with a compact
dimension | 33 pages, 2 figures; v3: intensively revised, version to appear in
PRD | Phys. Rev. D 97, 124028 (2018) | 10.1103/PhysRevD.97.124028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a flat spacetime with one spatial dimension compactified, inertial
reference frames are not all equivalent, but there are the preferred ones. This
paper investigates the nonequivalence of inertial frames and also that of
uniformly accelerated frames in connection with the response of the
Unruh-DeWitt detector coup... | [
{
"created": "Sat, 21 May 2016 15:09:55 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Jul 2016 07:03:45 GMT",
"version": "v2"
},
{
"created": "Sun, 10 Jun 2018 09:51:10 GMT",
"version": "v3"
}
] | 2018-06-20 | [
[
"Chiou",
"Dah-Wei",
""
]
] | In a flat spacetime with one spatial dimension compactified, inertial reference frames are not all equivalent, but there are the preferred ones. This paper investigates the nonequivalence of inertial frames and also that of uniformly accelerated frames in connection with the response of the Unruh-DeWitt detector couple... |
gr-qc/9412044 | null | Piotr T. Chrusciel, Nikolai S. Nadirashvili | All electro--vacuum Majumdar--Papapetrou space--times with nonsingular
black holes | 9 pages, Latex | Class.Quant.Grav.12:L17-L23,1995 | 10.1088/0264-9381/12/3/001 | null | gr-qc | null | We show that all Majumdar--Papapetrou electrovacuum space--times with a
non--empty black hole region and with a non--singular domain of outer
communications are the standard Majumdar--Papapetrou space--times.
| [
{
"created": "Fri, 16 Dec 1994 10:42:52 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"Chrusciel",
"Piotr T.",
""
],
[
"Nadirashvili",
"Nikolai S.",
""
]
] | We show that all Majumdar--Papapetrou electrovacuum space--times with a non--empty black hole region and with a non--singular domain of outer communications are the standard Majumdar--Papapetrou space--times. |
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