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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0001055 | Julio Cesar Fabris | A.B. Batista, J.C. Fabris and R. de S\'a Ribeiro | A remark on Brans-Dicke dust cosmological solutions with negative
$\omega$ | Latex file, 6 pages | Gen.Rel.Grav. 33 (2001) 1237-1244 | 10.1023/A:1012089402583 | null | gr-qc | null | Analysing the Brans-Dicke solutions for the dust phase, we show that, for
negative values of $\omega$, they contain scenarios that display an initial
subluminal expansion followed by an inflationary phase. We discuss these
solutions with respect to the results of the observation of high redshif
supernova as well as t... | [
{
"created": "Wed, 19 Jan 2000 21:50:17 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Batista",
"A. B.",
""
],
[
"Fabris",
"J. C.",
""
],
[
"Ribeiro",
"R. de Sá",
""
]
] | Analysing the Brans-Dicke solutions for the dust phase, we show that, for negative values of $\omega$, they contain scenarios that display an initial subluminal expansion followed by an inflationary phase. We discuss these solutions with respect to the results of the observation of high redshif supernova as well as the... |
gr-qc/0309027 | Robert T. Jantzen | Robert T. Jantzen | Exact Cosmological Solutions of Gravitational Theories | 11 latex article style pages | Phys.Lett.B186:290-296,1987 | 10.1016/0370-2693(87)90297-8 | null | gr-qc | null | A global picture is drawn tying together most exact cosmological solutions of
gravitational theories in four or more spacetime dimensions.
| [
{
"created": "Thu, 4 Sep 2003 15:19:22 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Jantzen",
"Robert T.",
""
]
] | A global picture is drawn tying together most exact cosmological solutions of gravitational theories in four or more spacetime dimensions. |
gr-qc/9911024 | Gianluca Gemme | Ph. Bernard, G. Gemme, R. Parodi and E. Picasso | Two Coupled Superconducting Cavities as a Gravitational Wave Detector:
First Experimental Results | 7 pages, 3 figures. Presented at the 9th Workshop on RF
Superconductivity, November 1-5, 1999, Santa Fe, New Mexico, USA | null | null | null | gr-qc | null | First experimental results of a feasibility study of a gravitational wave
detector based on two coupled superconducting cavities are presented. Basic
physical principles underlying the detector behaviour and sensitivity limits
are discussed. The detector layout is described in detail and its rf properties
are showed.... | [
{
"created": "Mon, 8 Nov 1999 13:17:58 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Bernard",
"Ph.",
""
],
[
"Gemme",
"G.",
""
],
[
"Parodi",
"R.",
""
],
[
"Picasso",
"E.",
""
]
] | First experimental results of a feasibility study of a gravitational wave detector based on two coupled superconducting cavities are presented. Basic physical principles underlying the detector behaviour and sensitivity limits are discussed. The detector layout is described in detail and its rf properties are showed. T... |
0808.4034 | Riccardo Sturani | Umberto Cannella and Riccardo Sturani (University of Geneva) | Classical energy momentum tensor renormalisation via effective field
theory methods | 20 pages, 6 figures. Sec. IV improved in v2. New introduction in v3.
Typos corrected and one reference added in v4, published version | Gen.Rel.Grav.42:2491-2509,2010 | 10.1007/s10714-010-0998-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the Effective Field Theory approach to General Relativity,
introduced by Goldberger and Rothstein, to study point-like and string-like
sources in the context of scalar-tensor theories of gravity. Within this
framework we compute the classical energy-momentum tensor renormalization to
first Post-Newtonian ord... | [
{
"created": "Fri, 29 Aug 2008 07:15:40 GMT",
"version": "v1"
},
{
"created": "Mon, 18 May 2009 20:58:08 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Nov 2009 13:41:36 GMT",
"version": "v3"
},
{
"created": "Wed, 8 Sep 2010 22:47:30 GMT",
"version": "v4"
}
] | 2014-11-18 | [
[
"Cannella",
"Umberto",
"",
"University of Geneva"
],
[
"Sturani",
"Riccardo",
"",
"University of Geneva"
]
] | We apply the Effective Field Theory approach to General Relativity, introduced by Goldberger and Rothstein, to study point-like and string-like sources in the context of scalar-tensor theories of gravity. Within this framework we compute the classical energy-momentum tensor renormalization to first Post-Newtonian order... |
1301.7652 | Alexandros P. Kouretsis | A.P. Kouretsis, M. Stathakopoulos and P.C. Stavrinos | Relativistic Finsler geometry | references added, Contribution to the proceedings of "Modern
Mathematical Methods in Science and Technology 2012 (M3ST2012)", Kalamata,
Greece, August, 2012 | null | 10.1002/mma.2919 | null | gr-qc astro-ph.CO math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We briefly review some basic concepts of parallel displacement in Finsler
geometry. In general relativity, the parallel translation of objects along the
congruence of the fundamental observer corresponds to the evolution in time. By
dropping the quadratic restriction on the measurement of an infinitesimal
distance, t... | [
{
"created": "Thu, 31 Jan 2013 15:44:03 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Feb 2013 16:58:10 GMT",
"version": "v2"
}
] | 2013-12-18 | [
[
"Kouretsis",
"A. P.",
""
],
[
"Stathakopoulos",
"M.",
""
],
[
"Stavrinos",
"P. C.",
""
]
] | We briefly review some basic concepts of parallel displacement in Finsler geometry. In general relativity, the parallel translation of objects along the congruence of the fundamental observer corresponds to the evolution in time. By dropping the quadratic restriction on the measurement of an infinitesimal distance, the... |
2108.11936 | Martin Bojowald | Martin Bojowald | Space-time physics in background-independent theories of quantum gravity | 28 pages, 4 figures | Universe 7 (2021) 251 | 10.3390/universe7070251 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Background independence is often emphasized as an important property of a
quantum theory of gravity that takes seriously the geometrical nature of
general relativity. In a background-independent formulation, quantum gravity
should determine not only the dynamics of space-time but also its geometry,
which may have equ... | [
{
"created": "Thu, 26 Aug 2021 17:48:06 GMT",
"version": "v1"
}
] | 2021-08-27 | [
[
"Bojowald",
"Martin",
""
]
] | Background independence is often emphasized as an important property of a quantum theory of gravity that takes seriously the geometrical nature of general relativity. In a background-independent formulation, quantum gravity should determine not only the dynamics of space-time but also its geometry, which may have equal... |
2004.00671 | Maria Okounkova | Maria Okounkova | Revisiting non-linearity in binary black hole mergers | 8 pages, 5 figures | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, it has been shown that with the inclusion of overtones, the
post-merger gravitational waveform at infinity of a binary black hole system is
well-modelled using pure linear theory. However, given that a binary black hole
merger is expected to be highly non-linear, where do these non-linearities,
which do not... | [
{
"created": "Wed, 1 Apr 2020 19:25:28 GMT",
"version": "v1"
}
] | 2020-04-03 | [
[
"Okounkova",
"Maria",
""
]
] | Recently, it has been shown that with the inclusion of overtones, the post-merger gravitational waveform at infinity of a binary black hole system is well-modelled using pure linear theory. However, given that a binary black hole merger is expected to be highly non-linear, where do these non-linearities, which do not m... |
1602.06253 | Magd Elias Kahil | M. I. Wanas, M. E. Kahil and Mona M. Kamal | An AP-Structure with Finslerian Flavor: Path Equations | null | null | 10.1134/S0202289316040162 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Bazanski approach for deriving paths is applied to Finsler geometry. The
approach is generalized and applied to a new developed geometry called
"Absolute parallelism with a Finslerian Flavor" (FAP). A sets of path equations
is derived for the FAP. This is the horizontal (h) set. A striking feature
appears in this... | [
{
"created": "Fri, 19 Feb 2016 18:53:01 GMT",
"version": "v1"
}
] | 2016-12-07 | [
[
"Wanas",
"M. I.",
""
],
[
"Kahil",
"M. E.",
""
],
[
"Kamal",
"Mona M.",
""
]
] | The Bazanski approach for deriving paths is applied to Finsler geometry. The approach is generalized and applied to a new developed geometry called "Absolute parallelism with a Finslerian Flavor" (FAP). A sets of path equations is derived for the FAP. This is the horizontal (h) set. A striking feature appears in this s... |
1401.5286 | Farzaneh Atyabi | K. Kaviani and F. Atyabi | If the spin of gravitational field depends on spacetime dimension | 5 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this manuscript a different perspective on gravitational field has been
proposed, suggesting different features of gravity depending on spacetime
dimension, which can explain preventing the formation of singularity inside
blackholes and also suggest interpreting spin-1 fields emerged in theories with
dimensional r... | [
{
"created": "Tue, 21 Jan 2014 12:15:30 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Apr 2015 14:02:19 GMT",
"version": "v2"
}
] | 2015-04-15 | [
[
"Kaviani",
"K.",
""
],
[
"Atyabi",
"F.",
""
]
] | In this manuscript a different perspective on gravitational field has been proposed, suggesting different features of gravity depending on spacetime dimension, which can explain preventing the formation of singularity inside blackholes and also suggest interpreting spin-1 fields emerged in theories with dimensional red... |
1405.2640 | Jiliang Jing | Zixu Zhao and Jiliang Jing | Ehrenfest scheme for complex thermodynamic systems in full phase space | 9 pages | JHEP 11 (2014) 037 | 10.1007/JHEP11(2014)037 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For a thermodynamic system with multiple pairs of intensive/extensive
variables and the thermodynamical coefficients attain finite or infinite values
on the phase boundary, we obtain the two classes of Ehrenfest equations in the
full phase space, and find that the rank of the matrix for these equations can
tell us th... | [
{
"created": "Mon, 12 May 2014 06:48:56 GMT",
"version": "v1"
},
{
"created": "Thu, 15 May 2014 03:32:36 GMT",
"version": "v2"
},
{
"created": "Sat, 7 Jun 2014 01:42:24 GMT",
"version": "v3"
},
{
"created": "Fri, 20 Jun 2014 13:51:12 GMT",
"version": "v4"
}
] | 2014-11-20 | [
[
"Zhao",
"Zixu",
""
],
[
"Jing",
"Jiliang",
""
]
] | For a thermodynamic system with multiple pairs of intensive/extensive variables and the thermodynamical coefficients attain finite or infinite values on the phase boundary, we obtain the two classes of Ehrenfest equations in the full phase space, and find that the rank of the matrix for these equations can tell us the ... |
gr-qc/9907102 | L. Raul Abramo | L. R. Abramo (1) and F. Finelli (2) ((1) University of Florida and
University of Munich, (2) University of Bologna, Brown University and
Istituto Te.S.R.E.) | Back Reaction of Gravitational Radiation on the Schwarzschild Black Hole | 13 pages, LaTex; one reference updated; submitted to Class. Q. Grav | Gen.Rel.Grav. 33 (2001) 339-352 | 10.1023/A:1002757419086 | HET-BROWN-1149 | gr-qc | null | We address some of the issues that appear in the study of back reaction in
Schwarzschild backgrounds. Our main object is the effective energy-momentum
tensor (EEMT) of gravitational perturbations. It is commonly held that only
asymptotically flat or radiation gauges can be employed for these purposes. We
show that th... | [
{
"created": "Thu, 29 Jul 1999 14:31:56 GMT",
"version": "v1"
},
{
"created": "Mon, 30 Aug 1999 12:53:01 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Abramo",
"L. R.",
""
],
[
"Finelli",
"F.",
""
]
] | We address some of the issues that appear in the study of back reaction in Schwarzschild backgrounds. Our main object is the effective energy-momentum tensor (EEMT) of gravitational perturbations. It is commonly held that only asymptotically flat or radiation gauges can be employed for these purposes. We show that the ... |
gr-qc/0311049 | Slava G. Turyshev | Slava G. Turyshev, Michael Shao and Kenneth Nordtvedt Jr | New Concept for Testing General Relativity: The Laser Astrometric Test
of Relativity (LATOR) Mission | 11 pages, 4 figures, invited talk presented at AIAA Meeting "Space
2003", 23 September 2003, Long Beach, CA | Astron.Nachr. 325 (2004) 267-277 | 10.1002/asna.200310205 | null | gr-qc | null | This paper discusses new Fundamental physics experiment that will test
relativistic gravity at the accuracy better than the effects of the second
order in the gravitational field strength, ~G^2. The Laser Astrometric Test Of
Relativity (LATOR) mission uses laser interferometry between two
micro-spacecraft whose lines... | [
{
"created": "Sat, 15 Nov 2003 04:11:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Shao",
"Michael",
""
],
[
"Nordtvedt",
"Kenneth",
"Jr"
]
] | This paper discusses new Fundamental physics experiment that will test relativistic gravity at the accuracy better than the effects of the second order in the gravitational field strength, ~G^2. The Laser Astrometric Test Of Relativity (LATOR) mission uses laser interferometry between two micro-spacecraft whose lines o... |
1704.07955 | Jos\'e A. Zapata | Homero G. D\'iaz-Mar\'in, Jos\'e A. Zapata | Observable currents and a covariant Poisson algebra of physical
observables | null | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observable currents are locally defined gauge invariant conserved currents;
physical observables may be calculated integrating them on appropriate
hypersurfaces. Due to the conservation law the hypersurfaces become irrelevant
up to homology, and the main objects of interest become the observable currents
them selves.... | [
{
"created": "Wed, 26 Apr 2017 02:45:46 GMT",
"version": "v1"
},
{
"created": "Wed, 24 May 2017 23:03:06 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Aug 2018 19:04:44 GMT",
"version": "v3"
}
] | 2018-08-03 | [
[
"Díaz-Marín",
"Homero G.",
""
],
[
"Zapata",
"José A.",
""
]
] | Observable currents are locally defined gauge invariant conserved currents; physical observables may be calculated integrating them on appropriate hypersurfaces. Due to the conservation law the hypersurfaces become irrelevant up to homology, and the main objects of interest become the observable currents them selves. G... |
1109.4629 | Martin Kober | Martin Kober | Generalized Quantization Principle in Canonical Quantum Gravity and
Application to Quantum Cosmology | 11 pages | Int.J.Mod.Phys.A27:1250106,2012 | 10.1142/S0217751X12501060 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper is considered a generalized quantization principle for the
gravitational field in canonical quantum gravity, especially with respect to
quantum geometrodynamics. This assumption can be interpreted as a transfer from
the generalized uncertainty principle in quantum mechanics, which is postulated
as gener... | [
{
"created": "Wed, 21 Sep 2011 08:58:23 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Mar 2012 23:21:49 GMT",
"version": "v2"
},
{
"created": "Sun, 5 Aug 2012 13:29:17 GMT",
"version": "v3"
}
] | 2012-08-07 | [
[
"Kober",
"Martin",
""
]
] | In this paper is considered a generalized quantization principle for the gravitational field in canonical quantum gravity, especially with respect to quantum geometrodynamics. This assumption can be interpreted as a transfer from the generalized uncertainty principle in quantum mechanics, which is postulated as general... |
1412.4366 | Jian-Yang Zhu | Xiao-Min Zhang and Jian-Yang Zhu | Primordial non-Gaussianity in noncanonical warm inflation | 7 pages, 2 figures | Phys. Rev. D 91, 063510 (2015) | 10.1103/PhysRevD.91.063510 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the bispectrum of the primordial curvature perturbation on
uniform-density hypersurfaces generated by a kind of the noncanonical warm
inflation, wherein the inflation is provided by a noncanonical scalar inflaton
field that is coupled to radiation through a thermal dissipation effect. We
obtain an analytic f... | [
{
"created": "Sun, 14 Dec 2014 14:45:23 GMT",
"version": "v1"
}
] | 2015-04-09 | [
[
"Zhang",
"Xiao-Min",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | We study the bispectrum of the primordial curvature perturbation on uniform-density hypersurfaces generated by a kind of the noncanonical warm inflation, wherein the inflation is provided by a noncanonical scalar inflaton field that is coupled to radiation through a thermal dissipation effect. We obtain an analytic for... |
2104.04596 | Toral Gupta | Toral Gupta, Mario Herrero-Valea, Diego Blas, Enrico Barausse, Neil
Cornish, Kent Yagi, Nicol\'as Yunes | New binary pulsar constraints on Einstein-{\ae}ther theory after
GW170817 | 43 pages, 8 figures; minor changes to match version published in CQG | Class. Quantum Grav. 38 195003 (2021) | 10.1088/1361-6382/ac1a69 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The timing of millisecond pulsars has long been used as an exquisitely
precise tool for testing the building blocks of general relativity, including
the strong equivalence principle and Lorentz symmetry. Observations of binary
systems involving at least one millisecond pulsar have been used to place
bounds on the par... | [
{
"created": "Fri, 9 Apr 2021 20:55:18 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Aug 2021 18:36:28 GMT",
"version": "v2"
}
] | 2021-08-31 | [
[
"Gupta",
"Toral",
""
],
[
"Herrero-Valea",
"Mario",
""
],
[
"Blas",
"Diego",
""
],
[
"Barausse",
"Enrico",
""
],
[
"Cornish",
"Neil",
""
],
[
"Yagi",
"Kent",
""
],
[
"Yunes",
"Nicolás",
""
]
] | The timing of millisecond pulsars has long been used as an exquisitely precise tool for testing the building blocks of general relativity, including the strong equivalence principle and Lorentz symmetry. Observations of binary systems involving at least one millisecond pulsar have been used to place bounds on the param... |
gr-qc/0606038 | Alan Macdonald | Alan Macdonald | Comment on "The Cosmic Time in Terms of the Redshift", by Carmeli et al | 2 pages, to appear Found. Phys. Lett | Found.Phys.Lett.19:631-632,2006 | 10.1007/s10702-006-1017-2 | null | gr-qc | null | The time-redshift relation of Carmeli et al. differs from that of the
standard flat LambdaCDM model by more than 500 million years for 1 < z < 4.5.
| [
{
"created": "Thu, 8 Jun 2006 22:56:05 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Macdonald",
"Alan",
""
]
] | The time-redshift relation of Carmeli et al. differs from that of the standard flat LambdaCDM model by more than 500 million years for 1 < z < 4.5. |
1001.1990 | Eric Greenwood | Eric Greenwood | Quantum Mechanical Effects in Gravitational Collapse | PhD thesis, 137 pages, 26 Figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this thesis we investigate quantum mechanical effects to various aspects
of gravitational collapse. These quantum mechanical effects are implemented in
the context of the Functional Schr\"odinger formalism. The Functional
Schr\"odinger formalism allows us to investigate the time-dependent evolutions
of the quantum... | [
{
"created": "Tue, 12 Jan 2010 19:33:34 GMT",
"version": "v1"
}
] | 2010-01-13 | [
[
"Greenwood",
"Eric",
""
]
] | In this thesis we investigate quantum mechanical effects to various aspects of gravitational collapse. These quantum mechanical effects are implemented in the context of the Functional Schr\"odinger formalism. The Functional Schr\"odinger formalism allows us to investigate the time-dependent evolutions of the quantum m... |
1607.01702 | Parthapratim Pradhan | Parthapratim Pradhan | CFT and Logarithmic Corrections to the Black Hole Entropy Product
Formula | Version accepted in AHEP | Advances in High Energy Physics Volume 2017 (2017), Article ID
2367387, 8 pages | 10.1155/2017/2367387 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the logarithmic corrections to the black hole (BH) entropy product
formula of outer horizon and inner horizon by taking into account the
\emph{effects of statistical quantum fluctuations around the thermal
equilibrium} and \emph{via conformal field theory} (CFT). We argue that
logarithmic corrections to th... | [
{
"created": "Wed, 6 Jul 2016 16:43:27 GMT",
"version": "v1"
},
{
"created": "Mon, 7 Aug 2017 16:13:05 GMT",
"version": "v2"
}
] | 2017-08-08 | [
[
"Pradhan",
"Parthapratim",
""
]
] | We examine the logarithmic corrections to the black hole (BH) entropy product formula of outer horizon and inner horizon by taking into account the \emph{effects of statistical quantum fluctuations around the thermal equilibrium} and \emph{via conformal field theory} (CFT). We argue that logarithmic corrections to the ... |
2110.01121 | Thomas Berry | Thomas Berry | Mimicking Black Holes in General Relativity | Masters thesis | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The central theme of this thesis is the study and analysis of black hole
mimickers. The concept of a black hole mimicker is introduced, and various
mimicker spacetime models are examined within the framework of classical
general relativity. The mimickers examined fall into the classes of regular
black holes and trave... | [
{
"created": "Thu, 30 Sep 2021 07:15:15 GMT",
"version": "v1"
}
] | 2021-10-05 | [
[
"Berry",
"Thomas",
""
]
] | The central theme of this thesis is the study and analysis of black hole mimickers. The concept of a black hole mimicker is introduced, and various mimicker spacetime models are examined within the framework of classical general relativity. The mimickers examined fall into the classes of regular black holes and travers... |
2403.20011 | Sunil Maurya DR. | S. K. Maurya, Ksh. Newton Singh, G. Mustafa, M. Govender, Abdelghani
Errehymy, Abdul Aziz | Influence of pressure anisotropy and non-metricity parameter on
mass-radius relation and stability of millisecond pulsar in $f(Q)$ gravity | 6 figures and 2 tables (Submssion for JCAP) | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this study we explore the astrophysical implications of pressure
anisotropy on the physical characteristics of millisecond pulsars within the
framework of $f(Q)$ gravity. Starting off with the field equations for
anisotropic matter distributions, we adopt the physically salient
Durgapal-Fuloria ansatz together wit... | [
{
"created": "Fri, 29 Mar 2024 06:52:53 GMT",
"version": "v1"
}
] | 2024-04-01 | [
[
"Maurya",
"S. K.",
""
],
[
"Singh",
"Ksh. Newton",
""
],
[
"Mustafa",
"G.",
""
],
[
"Govender",
"M.",
""
],
[
"Errehymy",
"Abdelghani",
""
],
[
"Aziz",
"Abdul",
""
]
] | In this study we explore the astrophysical implications of pressure anisotropy on the physical characteristics of millisecond pulsars within the framework of $f(Q)$ gravity. Starting off with the field equations for anisotropic matter distributions, we adopt the physically salient Durgapal-Fuloria ansatz together with ... |
1105.4929 | Pankaj Jain | Pankaj Jain, Purnendu Karmakar, Subhadip Mitra, Sukanta Panda, Naveen
K. Singh | Cosmological Perturbation Analysis in a Scale Invariant Model of Gravity | 9 pages, 1 figure | Class.Quant.Grav.28:215010,2011 | 10.1088/0264-9381/28/21/215010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a model for gravity that is invariant under global scale
transformations. It includes one extra real scalar field coupled non-minimally
to the gravity fields. In this model all the dimensionful parameters like the
gravitational constant and the cosmological constant etc. are generated by a
solution of the... | [
{
"created": "Wed, 25 May 2011 04:23:13 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Feb 2012 15:45:11 GMT",
"version": "v2"
}
] | 2012-02-06 | [
[
"Jain",
"Pankaj",
""
],
[
"Karmakar",
"Purnendu",
""
],
[
"Mitra",
"Subhadip",
""
],
[
"Panda",
"Sukanta",
""
],
[
"Singh",
"Naveen K.",
""
]
] | We consider a model for gravity that is invariant under global scale transformations. It includes one extra real scalar field coupled non-minimally to the gravity fields. In this model all the dimensionful parameters like the gravitational constant and the cosmological constant etc. are generated by a solution of the c... |
gr-qc/9901008 | Daniel Augusto Turolla Vanzella | George E.A. Matsas and Daniel A.T. Vanzella | Decay of protons and neutrons induced by acceleration | 18 pages (REVTEX), 3 figures | Phys.Rev. D59 (1999) 094004 | 10.1103/PhysRevD.59.094004 | IFT-P.007/99 | gr-qc hep-ph hep-th | null | We investigate the decay of accelerated protons and neutrons. Calculations
are carried out in the inertial and coaccelerated frames. Particle
interpretation of these processes are quite different in each frame but the
decay rates are verified to agree in both cases. For sake of simplicity our
calculations are perform... | [
{
"created": "Tue, 5 Jan 1999 16:08:05 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Matsas",
"George E. A.",
""
],
[
"Vanzella",
"Daniel A. T.",
""
]
] | We investigate the decay of accelerated protons and neutrons. Calculations are carried out in the inertial and coaccelerated frames. Particle interpretation of these processes are quite different in each frame but the decay rates are verified to agree in both cases. For sake of simplicity our calculations are performed... |
gr-qc/9710015 | Chris Chambers | Chris M. Chambers (Montana State), Patrick R. Brady (CalTech), William
Krivan (Utah) and Pablo Laguna (Penn. State) | Some Cosmological Tails of Collapse | 3 pages (including 2 postscript figures), Latex. Uses mprocl.sty
(included). To appear in the proceedings of `The Eight Marcel Grossmann
Meeting on General Relativity', 22-27 June 1997, The Hebrew University,
Jerusalem, Israel | null | null | MSUPHY9720 | gr-qc | null | We summarize the results of an investigation into the late time behavior of
massless scalar fields propagating on spherically symmetric black hole
spacetimes with a non-zero cosmological constant. The compatibility of these
results with the `minimal requirement' of Brady and Poisson is commented upon.
| [
{
"created": "Thu, 2 Oct 1997 18:37:27 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Chambers",
"Chris M.",
"",
"Montana State"
],
[
"Brady",
"Patrick R.",
"",
"CalTech"
],
[
"Krivan",
"William",
"",
"Utah"
],
[
"Laguna",
"Pablo",
"",
"Penn. State"
]
] | We summarize the results of an investigation into the late time behavior of massless scalar fields propagating on spherically symmetric black hole spacetimes with a non-zero cosmological constant. The compatibility of these results with the `minimal requirement' of Brady and Poisson is commented upon. |
1805.12593 | Kazuharu Bamba | G.G.L. Nashed and Kazuharu Bamba | Spherically symmetric charged black hole in conformal teleparallel
equivalent of general relativity | 11 pages, no figure, version accepted for publication in JCAP | Journal of Cosmology and Astroparticle Physics 09 (2018) 020 | 10.1088/1475-7516/2018/09/020 | FU-PCG-35 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study 4-dimensional non-charged and charged spherically symmetric
spacetimes in conformal teleparallel equivalent of general relativity. We apply
the gravitational field equations in non-charged and charged spacetimes to the
diagonal and non-diagonal vierbeins and derive their sets of the non-linear
differential e... | [
{
"created": "Tue, 29 May 2018 14:20:58 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Aug 2018 15:26:00 GMT",
"version": "v2"
}
] | 2018-09-17 | [
[
"Nashed",
"G. G. L.",
""
],
[
"Bamba",
"Kazuharu",
""
]
] | We study 4-dimensional non-charged and charged spherically symmetric spacetimes in conformal teleparallel equivalent of general relativity. We apply the gravitational field equations in non-charged and charged spacetimes to the diagonal and non-diagonal vierbeins and derive their sets of the non-linear differential equ... |
1701.09169 | Naoki Tsukamoto | Naoki Tsukamoto | Retrolensing by a wormhole at deflection angles $\pi$ and $3\pi$ | 20 pages, 6 figures, title changed, minor correction, accepted for
publication in Physical Review D | Phys. Rev. D 95, 084021 (2017) | 10.1103/PhysRevD.95.084021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The deflection angle of a light ray can be arbitrarily large near a light
sphere. The time-symmetrical shape of light curves of a pair of light rays
reflected by a light sphere of a lens object does not depend on the details of
the lens object. We consider retrolensing light curves of sunlight with
deflection angles ... | [
{
"created": "Tue, 31 Jan 2017 18:32:19 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Apr 2017 13:56:33 GMT",
"version": "v2"
}
] | 2017-04-14 | [
[
"Tsukamoto",
"Naoki",
""
]
] | The deflection angle of a light ray can be arbitrarily large near a light sphere. The time-symmetrical shape of light curves of a pair of light rays reflected by a light sphere of a lens object does not depend on the details of the lens object. We consider retrolensing light curves of sunlight with deflection angles $\... |
gr-qc/9510028 | Chris Isham | P. Hajicek and C.J. Isham | The symplectic geometry of a parametrized scalar field on a curved
background | 30 pages, revtex | J.Math.Phys. 37 (1996) 3505-3521 | 10.1063/1.531578 | IMPERIAL/TP/95--96/1 | gr-qc | null | We study the real, massive Klein-Gordon field on a $C^\infty$
globally-hyperbolic background space-time with compact Cauchy hypersurfaces. In
particular, the parametrization of this system as initiated by Dirac and
Kucha\v{r} is put on a rigorous basis. The discussion is focussed on the
structure of the set of spacel... | [
{
"created": "Mon, 16 Oct 1995 20:56:51 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Hajicek",
"P.",
""
],
[
"Isham",
"C. J.",
""
]
] | We study the real, massive Klein-Gordon field on a $C^\infty$ globally-hyperbolic background space-time with compact Cauchy hypersurfaces. In particular, the parametrization of this system as initiated by Dirac and Kucha\v{r} is put on a rigorous basis. The discussion is focussed on the structure of the set of spacelik... |
2403.07302 | Rudeep Gaur | Rudeep Gaur (Victoria University of Wellington) | The Kerr Memory Effect at Null Infinity | 15 pages (2 references added on request) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We compute the memory effect due to a gravitational wave striking a Kerr
black hole as seen by an observer at null infinity. This is done by working in
Bondi--Sachs coordinates. It was shown by Hawking, Perry, and Strominger (HPS)
that the memory effect due to a gravitational shockwave is seen as a pure BMS
supertran... | [
{
"created": "Tue, 12 Mar 2024 04:07:19 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Mar 2024 21:12:00 GMT",
"version": "v2"
}
] | 2024-03-29 | [
[
"Gaur",
"Rudeep",
"",
"Victoria University of Wellington"
]
] | We compute the memory effect due to a gravitational wave striking a Kerr black hole as seen by an observer at null infinity. This is done by working in Bondi--Sachs coordinates. It was shown by Hawking, Perry, and Strominger (HPS) that the memory effect due to a gravitational shockwave is seen as a pure BMS supertransl... |
2105.06636 | Sumanta Chakraborty | Indrani Banerjee, Sumanta Chakraborty and Soumitra SenGupta | Looking for extra dimensions in the observed quasi-periodic oscillations
of black holes | Published version, 37 pages, 9 figures | JCAP09(2021)037 | 10.1088/1475-7516/2021/09/037 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quasi-periodic oscillations, often present in the power density spectrum of
accretion disk around black holes, are useful probes for the understanding of
gravitational interaction in the near-horizon regime of black holes. Since the
presence of an extra spatial dimension modifies the near horizon geometry of
black ho... | [
{
"created": "Fri, 14 May 2021 04:13:19 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Sep 2021 03:56:19 GMT",
"version": "v2"
}
] | 2021-09-29 | [
[
"Banerjee",
"Indrani",
""
],
[
"Chakraborty",
"Sumanta",
""
],
[
"SenGupta",
"Soumitra",
""
]
] | Quasi-periodic oscillations, often present in the power density spectrum of accretion disk around black holes, are useful probes for the understanding of gravitational interaction in the near-horizon regime of black holes. Since the presence of an extra spatial dimension modifies the near horizon geometry of black hole... |
1705.06988 | Hafiza Rizwana Kausar | Hafiza Rizwana Kausar | Behaviour of Charged Collapsing Fluids after Hydrostatic Equilibrium in
R^n Gravity | Accepted for publication in European Physical Journal C | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this paper is to study the transport equation and its coupling
with Maxwell equation in the framework of R^n gravity. Using
Muller-Israel-Stewart theory for the conduction of dissipative fluids, we
analyze the temperature, heat flux, viscosity and thermal conductivity in the
scenario of relaxation time... | [
{
"created": "Thu, 18 May 2017 06:46:49 GMT",
"version": "v1"
}
] | 2017-05-22 | [
[
"Kausar",
"Hafiza Rizwana",
""
]
] | The purpose of this paper is to study the transport equation and its coupling with Maxwell equation in the framework of R^n gravity. Using Muller-Israel-Stewart theory for the conduction of dissipative fluids, we analyze the temperature, heat flux, viscosity and thermal conductivity in the scenario of relaxation time. ... |
gr-qc/9612010 | Simonetta Frittelli | Simonetta Frittelli, Carlos N. Kozameh, Ezra T. Newman, Carlo Rovelli,
Ranjeet S. Tate (University of Pittsburgh) | On the quantization of the Null-Surface formulation of GR | 24 pages, Revtex | Phys.Rev. D56 (1997) 889-907 | 10.1103/PhysRevD.56.889 | null | gr-qc | null | We define and discuss various quantum operators that describe the geometry of
spacetime in quantum general relativity. These are obtained by combining the
Null-Surface Formulation of general relativity, recently developed, with
asymptotic quantization. One of the operators defined describes a ``fuzzy''
quantum light ... | [
{
"created": "Tue, 3 Dec 1996 19:44:38 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Frittelli",
"Simonetta",
"",
"University of Pittsburgh"
],
[
"Kozameh",
"Carlos N.",
"",
"University of Pittsburgh"
],
[
"Newman",
"Ezra T.",
"",
"University of Pittsburgh"
],
[
"Rovelli",
"Carlo",
"",
"University of Pittsburgh"
],
[... | We define and discuss various quantum operators that describe the geometry of spacetime in quantum general relativity. These are obtained by combining the Null-Surface Formulation of general relativity, recently developed, with asymptotic quantization. One of the operators defined describes a ``fuzzy'' quantum light co... |
2312.03760 | Dr. Sudhaker Upadhyay | Amit Kumar, Dharm Veer Singh, Yerlan Myrzakulov, Gulmira Yergaliyeva
and Sudhaker Upadhyay | Exact Solution of Bardeen Black Hole in Einstein-Gauss-Bonnet gravity | 22 pages, 22 pages, published in EPJP | Eur. Phys. J. Plus (2023) 138:1071 | 10.1140/epjp/s13360-023-04718-3 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We have obtained a new exact regular black hole solution for the EGB gravity
coupled with nonlinear electrodynamics in AdS space. The numerical analysis of
horizon structure suggests two horizons exist: Cauchy and event. We also study
the thermal properties of this black hole, which satisfy the modified first law
of ... | [
{
"created": "Tue, 5 Dec 2023 16:43:09 GMT",
"version": "v1"
}
] | 2023-12-08 | [
[
"Kumar",
"Amit",
""
],
[
"Singh",
"Dharm Veer",
""
],
[
"Myrzakulov",
"Yerlan",
""
],
[
"Yergaliyeva",
"Gulmira",
""
],
[
"Upadhyay",
"Sudhaker",
""
]
] | We have obtained a new exact regular black hole solution for the EGB gravity coupled with nonlinear electrodynamics in AdS space. The numerical analysis of horizon structure suggests two horizons exist: Cauchy and event. We also study the thermal properties of this black hole, which satisfy the modified first law of th... |
1804.03535 | Changjun Gao | Changjun Gao | Extending Horndeski theories into Lovelock gravity | 9 pages,8 figures. errors corrected, references added | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Horndeski theories are extended into the Lovelock gravity theory. When
the canonical scalar field is uniquely kinetically coupled to the Lovelock
tensors, it is named after Lovelock scalar field. The Lovelock scalar field
model is a subclass of the new Horndeski theories. A most attractive feature of
the Lovelock... | [
{
"created": "Tue, 10 Apr 2018 13:50:05 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Apr 2018 01:50:51 GMT",
"version": "v2"
},
{
"created": "Thu, 17 May 2018 01:40:40 GMT",
"version": "v3"
}
] | 2018-05-18 | [
[
"Gao",
"Changjun",
""
]
] | The Horndeski theories are extended into the Lovelock gravity theory. When the canonical scalar field is uniquely kinetically coupled to the Lovelock tensors, it is named after Lovelock scalar field. The Lovelock scalar field model is a subclass of the new Horndeski theories. A most attractive feature of the Lovelock s... |
gr-qc/9303014 | null | Istvan Racz | Maxwell Fields in Spacetimes Admitting Non-Null Killing Vectors | 7 pages,PACS numbers: 04.20.Cv, 04.20.Me, 04.40.+c | Class.Quant.Grav.10:L167-L172,1993 | 10.1088/0264-9381/10/9/010 | null | gr-qc | null | We consider source-free electromagnetic fields in spacetimes possessing a
non-null Killing vector field, $\xi^a$. We assume further that the
electromagnetic field tensor, $F_{ab}$, is invariant under the action of the
isometry group induced by $\xi^a$. It is proved that whenever the two
potentials associated with the... | [
{
"created": "Wed, 10 Mar 1993 15:24:01 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Racz",
"Istvan",
""
]
] | We consider source-free electromagnetic fields in spacetimes possessing a non-null Killing vector field, $\xi^a$. We assume further that the electromagnetic field tensor, $F_{ab}$, is invariant under the action of the isometry group induced by $\xi^a$. It is proved that whenever the two potentials associated with the e... |
2102.07494 | Vladimir Dzhunushaliev | Vladimir Dzhunushaliev and Vladimir Folomeev | Masking singularities in Weyl gravity and Ricci flows | 10 pages | null | 10.1140/epjc/s10052-021-09188-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within vacuum Weyl gravity, we obtain a solution by which, using different
choices of the conformal factor, we derive metrics describing (i)~a bounce of
the universe; (ii)~toroidal and spherical wormholes; and (iii)~a change in
metric signature. It is demonstrated that singularities occurring in these
systems are "ma... | [
{
"created": "Mon, 15 Feb 2021 11:58:36 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Apr 2021 05:47:52 GMT",
"version": "v2"
}
] | 2021-05-19 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
]
] | Within vacuum Weyl gravity, we obtain a solution by which, using different choices of the conformal factor, we derive metrics describing (i)~a bounce of the universe; (ii)~toroidal and spherical wormholes; and (iii)~a change in metric signature. It is demonstrated that singularities occurring in these systems are "mask... |
0905.2542 | E. Kyriakopoulos | E. Kyriakopoulos | Rotating Black Hole Solutions with Axion Dilaton and Two Vector Fields
and Solutions with Metric and Fields of the Same Form | 50 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present two rotating black hole solutions with axion $\xi$, dilaton $\phi$
and two U(1) vector fields. By applying the "Newman-Janis trick" to a metric
with 3 arbitrary parameters we find a rotating metric $g_{\mu\nu}$ with 4 such
parameters $(M, a, Q_E, Q_M)$, and then a solution with this $g_{\mu\nu}$ as
metric.... | [
{
"created": "Fri, 15 May 2009 12:57:08 GMT",
"version": "v1"
}
] | 2009-05-18 | [
[
"Kyriakopoulos",
"E.",
""
]
] | We present two rotating black hole solutions with axion $\xi$, dilaton $\phi$ and two U(1) vector fields. By applying the "Newman-Janis trick" to a metric with 3 arbitrary parameters we find a rotating metric $g_{\mu\nu}$ with 4 such parameters $(M, a, Q_E, Q_M)$, and then a solution with this $g_{\mu\nu}$ as metric. O... |
2001.10914 | Marta Colleoni | Cecilio Garc\'ia-Quir\'os, Marta Colleoni, Sascha Husa, H\'ector
Estell\'es, Geraint Pratten, Antoni Ramos-Buades, Maite Mateu-Lucena, and
Rafel Jaume | IMRPhenomXHM: A multi-mode frequency-domain model for the gravitational
wave signal from non-precessing black-hole binaries | 30 pages, 23 figures. Updated to match published version | Phys. Rev. D 102, 064002 (2020) | 10.1103/PhysRevD.102.064002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the IMRPhenomXHM frequency domain phenomenological waveform model
for the inspiral, merger and ringdown of quasi-circular non-precessing black
hole binaries. The model extends the IMRPhenomXAS waveform model, which
describes the dominant quadrupole modes $\ell = |m| = 2$, to the harmonics
$(\ell, |m|)=(2,1... | [
{
"created": "Wed, 29 Jan 2020 16:01:33 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Nov 2020 12:27:51 GMT",
"version": "v2"
}
] | 2020-11-04 | [
[
"García-Quirós",
"Cecilio",
""
],
[
"Colleoni",
"Marta",
""
],
[
"Husa",
"Sascha",
""
],
[
"Estellés",
"Héctor",
""
],
[
"Pratten",
"Geraint",
""
],
[
"Ramos-Buades",
"Antoni",
""
],
[
"Mateu-Lucena",
"Maite",
... | We present the IMRPhenomXHM frequency domain phenomenological waveform model for the inspiral, merger and ringdown of quasi-circular non-precessing black hole binaries. The model extends the IMRPhenomXAS waveform model, which describes the dominant quadrupole modes $\ell = |m| = 2$, to the harmonics $(\ell, |m|)=(2,1),... |
2304.11458 | Roberto Capuzzo-Dolcetta | Roberto Capuzzo-Dolcetta (1) and Matteo Sadun Bordoni (1 and 2) ((1)
Dep. of Physics, Sapienza Univ. of Rome, P.le A. Moro 5, Rome, Italy, (2)
Max-Planck-Institut fuer Extraterrestrische Physik, Giessenbachstrasse 1,
85748 Garching, Germany) | Orbital precession of stars in the Galactic center | 12 pages, 8 figures, 7 tables. Submitted to Monthly Notices of the
Royal Astronomical Society | null | 10.1093/mnras/stad1317 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | The region around the center of our Galaxy is very dense of stars. The
kinematics of inner moving stars in the Galaxy (the so called S-stars) has been
deeply studied by different research groups leading to the conclusion of the
existence of a very compact object (Sgr A$^*$, likely a supermassive black
hole) responsib... | [
{
"created": "Sat, 22 Apr 2023 18:12:47 GMT",
"version": "v1"
}
] | 2023-05-10 | [
[
"Capuzzo-Dolcetta",
"Roberto",
"",
"1 and 2"
],
[
"Bordoni",
"Matteo Sadun",
"",
"1 and 2"
]
] | The region around the center of our Galaxy is very dense of stars. The kinematics of inner moving stars in the Galaxy (the so called S-stars) has been deeply studied by different research groups leading to the conclusion of the existence of a very compact object (Sgr A$^*$, likely a supermassive black hole) responsible... |
1012.2327 | Mayeul Arminjon | Mayeul Arminjon and Frank Reifler | Four-vector vs. four-scalar representation of the Dirac wave function | 30 pages (standard 12pt). v2: version accepted for publication in
Int. J. Geom. Meth. Mod. Phys. Some emphasis and a clarification in Sect.
2.1. The Appendix now proves that the complex tangent bundle is a spinor
bundle according to precisely the definition given in Sect. 2.1. Proof of the
main Theorem 2 made e... | Int. J. Geom. Meth. Mod. Phys., Vol. 9, 1250026 (2012) | 10.1142/S0219887812500260 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a Minkowski spacetime, one may transform the Dirac wave function under the
spin group, as one transforms coordinates under the Poincar\'e group. This is
not an option in a curved spacetime. Therefore, in the equation proposed
independently by Fock and Weyl, the four complex components of the Dirac wave
function tr... | [
{
"created": "Fri, 10 Dec 2010 17:33:16 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Oct 2011 14:00:33 GMT",
"version": "v2"
}
] | 2012-04-30 | [
[
"Arminjon",
"Mayeul",
""
],
[
"Reifler",
"Frank",
""
]
] | In a Minkowski spacetime, one may transform the Dirac wave function under the spin group, as one transforms coordinates under the Poincar\'e group. This is not an option in a curved spacetime. Therefore, in the equation proposed independently by Fock and Weyl, the four complex components of the Dirac wave function tran... |
1901.03972 | Bruno Barros | Bruno J. Barros | Kinetically coupled dark energy | 11 pages, 5 figures. V2: Matches published version | Phys. Rev. D 99, 064051 (2019) | 10.1103/PhysRevD.99.064051 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main goal of this work is to propose a generalized model of interacting
dark energy which allows for the kinetic term of a scalar field to couple to
the matter species a priori in the action. We derive the modified field
equations, and present novel cosmological solutions for a specific coupled
model. One allurin... | [
{
"created": "Sun, 6 Jan 2019 16:50:58 GMT",
"version": "v1"
},
{
"created": "Fri, 29 Mar 2019 15:07:22 GMT",
"version": "v2"
}
] | 2019-04-01 | [
[
"Barros",
"Bruno J.",
""
]
] | The main goal of this work is to propose a generalized model of interacting dark energy which allows for the kinetic term of a scalar field to couple to the matter species a priori in the action. We derive the modified field equations, and present novel cosmological solutions for a specific coupled model. One alluring ... |
2102.00340 | David Ramos-Salamanca | D. Ramos-Salamanca, L. A. N\'u\~nez, J. Ospino | Physical acceptability conditions for realistic neutron star equations
of state | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We select 37 most common and realistic dense matter equation of states to
integrate the general relativistic stellar structure equations for static
spherically symmetric matter configurations. For all these models, we check the
compliance of the acceptability conditions that every stellar model should
satisfy. It was... | [
{
"created": "Sat, 30 Jan 2021 23:55:45 GMT",
"version": "v1"
}
] | 2021-02-02 | [
[
"Ramos-Salamanca",
"D.",
""
],
[
"Núñez",
"L. A.",
""
],
[
"Ospino",
"J.",
""
]
] | We select 37 most common and realistic dense matter equation of states to integrate the general relativistic stellar structure equations for static spherically symmetric matter configurations. For all these models, we check the compliance of the acceptability conditions that every stellar model should satisfy. It was f... |
0705.1511 | Burkhard Kleihaus | Burkhard Kleihaus, Jutta Kunz, Francisco Navarro-L\'erida, Ulrike
Neemann | Stationary Dyonic Regular and Black Hole Solutions | 23 pages, 4 figures | Gen.Rel.Grav.40:1279-1310,2008 | 10.1007/s10714-007-0604-2 | null | gr-qc | null | We consider globally regular and black hole solutions in SU(2)
Einstein-Yang-Mills-Higgs theory, coupled to a dilaton field. The basic
solutions represent magnetic monopoles, monopole-antimonopole systems or black
holes with monopole or dipole hair. When the globally regular solutions carry
additionally electric char... | [
{
"created": "Thu, 10 May 2007 17:16:05 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Navarro-Lérida",
"Francisco",
""
],
[
"Neemann",
"Ulrike",
""
]
] | We consider globally regular and black hole solutions in SU(2) Einstein-Yang-Mills-Higgs theory, coupled to a dilaton field. The basic solutions represent magnetic monopoles, monopole-antimonopole systems or black holes with monopole or dipole hair. When the globally regular solutions carry additionally electric charge... |
gr-qc/0603008 | Etera R. Livine | Etera R. Livine, Daniel R. Terno | Reconstructing Quantum Geometry from Quantum Information: Area
Renormalisation, Coarse-Graining and Entanglement on Spin Networks | 27 pages, 12 figures, RevTex4 | null | null | null | gr-qc | null | After a brief review of spin networks and their interpretation as wave
functions for the (space) geometry, we discuss the renormalisation of the area
operator in loop quantum gravity. In such a background independent framework,
we propose to probe the structure of a surface through the analysis of the
coarse-graining... | [
{
"created": "Fri, 3 Mar 2006 13:59:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Livine",
"Etera R.",
""
],
[
"Terno",
"Daniel R.",
""
]
] | After a brief review of spin networks and their interpretation as wave functions for the (space) geometry, we discuss the renormalisation of the area operator in loop quantum gravity. In such a background independent framework, we propose to probe the structure of a surface through the analysis of the coarse-graining a... |
gr-qc/9408007 | Renate Loll | R. Loll | Independent Loop Invariants for 2+1 Gravity | 11pp, 2 figures (postscript, compressed and uu-encoded), TeX,
Pennsylvania State University, CGPG-94/7-1 | Class.Quant.Grav.12:1655-1662,1995 | 10.1088/0264-9381/12/7/008 | null | gr-qc | null | We identify an explicit set of complete and independent Wilson loop
invariants for 2+1 gravity on a three-manifold $M=\R\times\Sigma^g$, with
$\Sigma^g$ a compact oriented Riemann surface of arbitrary genus $g$. In the
derivation we make use of a global cross section of the $PSU(1,1)$-principal
bundle over Teichm\"ul... | [
{
"created": "Wed, 3 Aug 1994 22:47:43 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Loll",
"R.",
""
]
] | We identify an explicit set of complete and independent Wilson loop invariants for 2+1 gravity on a three-manifold $M=\R\times\Sigma^g$, with $\Sigma^g$ a compact oriented Riemann surface of arbitrary genus $g$. In the derivation we make use of a global cross section of the $PSU(1,1)$-principal bundle over Teichm\"ulle... |
gr-qc/0112004 | Robin W. Tucker | R W Tucker and C Wang | Gravitational Wave Induced Vibrations of Slender Structures in Space | 26 pages, 3 Figures | Gen.Rel.Grav. 35 (2003) 2137-2158 | 10.1023/A:1027397522624 | null | gr-qc | null | This paper explores the interaction of weak gravitational fields with slender
elastic materials in space and estimates their sensitivities for the detection
of gravitational waves with frequencies between $10^{-4}$ and 1 Hz. The dynamic
behaviour of such slender structures is ideally suited to analysis by the
simple ... | [
{
"created": "Thu, 6 Dec 2001 14:48:05 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Tucker",
"R W",
""
],
[
"Wang",
"C",
""
]
] | This paper explores the interaction of weak gravitational fields with slender elastic materials in space and estimates their sensitivities for the detection of gravitational waves with frequencies between $10^{-4}$ and 1 Hz. The dynamic behaviour of such slender structures is ideally suited to analysis by the simple th... |
0812.4333 | Piotr Bizon | Piotr Bizo\'n, Tadeusz Chmaj, Andrzej Rostworowski | Late-time tails of a self-gravitating massless scalar field, revisited | 10 pages, 6 figures, one reference added, updated to conform with
published version | Class.Quant.Grav.26:175006,2009 | 10.1088/0264-9381/26/17/175006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the nonlinear origin of the power-law tail in the long-time
evolution of a spherically symmetric self-gravitating massless scalar field in
even-dimensional spacetimes. Using third-order perturbation method, we derive
explicit expressions for the tail (the decay rate and the amplitude) for
solutions startin... | [
{
"created": "Tue, 23 Dec 2008 14:50:06 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Jul 2009 15:57:17 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Aug 2009 05:26:46 GMT",
"version": "v3"
}
] | 2010-05-12 | [
[
"Bizoń",
"Piotr",
""
],
[
"Chmaj",
"Tadeusz",
""
],
[
"Rostworowski",
"Andrzej",
""
]
] | We discuss the nonlinear origin of the power-law tail in the long-time evolution of a spherically symmetric self-gravitating massless scalar field in even-dimensional spacetimes. Using third-order perturbation method, we derive explicit expressions for the tail (the decay rate and the amplitude) for solutions starting ... |
0905.4179 | J\"org Hennig | Gernot Neugebauer and J\"org Hennig | Non-existence of stationary two-black-hole configurations | 15 pages, 3 figures; Contribution to Juergen Ehlers Memorial Issue
(GeRG journal) | Gen.Rel.Grav.41:2113-2130,2009 | 10.1007/s10714-009-0840-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We resume former discussions of the question, whether the spin-spin repulsion
and the gravitational attraction of two aligned black holes can balance each
other. To answer the question we formulate a boundary value problem for two
separate (Killing-) horizons and apply the inverse (scattering) method to solve
it. Mak... | [
{
"created": "Tue, 26 May 2009 11:54:17 GMT",
"version": "v1"
},
{
"created": "Fri, 29 May 2009 08:51:20 GMT",
"version": "v2"
},
{
"created": "Thu, 25 Jun 2009 14:09:43 GMT",
"version": "v3"
}
] | 2010-04-30 | [
[
"Neugebauer",
"Gernot",
""
],
[
"Hennig",
"Jörg",
""
]
] | We resume former discussions of the question, whether the spin-spin repulsion and the gravitational attraction of two aligned black holes can balance each other. To answer the question we formulate a boundary value problem for two separate (Killing-) horizons and apply the inverse (scattering) method to solve it. Makin... |
gr-qc/0104054 | Jljing | Jiliang Jing, Mu-Lin Yan | Quantum entropy of the Kerr black hole arising from gravitational
perturbation | 8 pages, 1 figure, Latex. to appear in Phys. Rev. D | Phys.Rev. D64 (2001) 064015 | 10.1103/PhysRevD.64.064015 | null | gr-qc hep-th | null | The quantum entropy of the Kerr black hole arising from gravitational
perturbation is investigated by using Null tetrad and \'t Hooft\'s brick-wall
model. It is shown that effect of the graviton\'s spins on the subleading
correction is dependent of the square of the spins and the angular momentum per
unit mass of the... | [
{
"created": "Tue, 17 Apr 2001 23:54:46 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Jun 2001 14:46:08 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Jing",
"Jiliang",
""
],
[
"Yan",
"Mu-Lin",
""
]
] | The quantum entropy of the Kerr black hole arising from gravitational perturbation is investigated by using Null tetrad and \'t Hooft\'s brick-wall model. It is shown that effect of the graviton\'s spins on the subleading correction is dependent of the square of the spins and the angular momentum per unit mass of the b... |
gr-qc/0303070 | Ken D. Olum | Ken D. Olum | Conflict between anthropic reasoning and observation | 7 pages, RevTeX. v2: New "lost colony" section. Corresponds to
published version | Analysis 64 (2004),1 | null | null | gr-qc physics.soc-ph | null | Anthropic reasoning often begins with the premise that we should expect to
find ourselves typical among all intelligent observers. However, in the
infinite universe predicted by inflation, there are some civilizations which
have spread across their galaxies and contain huge numbers of individuals.
Unless the proporti... | [
{
"created": "Wed, 19 Mar 2003 15:14:13 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Feb 2004 16:04:23 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Olum",
"Ken D.",
""
]
] | Anthropic reasoning often begins with the premise that we should expect to find ourselves typical among all intelligent observers. However, in the infinite universe predicted by inflation, there are some civilizations which have spread across their galaxies and contain huge numbers of individuals. Unless the proportion... |
gr-qc/0611113 | Sante Carloni | Sante Carloni, Peter K. S. Dunsby, Claudio Rubano | Gauge invariant perturbations of Scalar-Tensor Cosmologies: The vacuum
case | 19 pages, 3 figures, accepted for publication on PRD | Phys.Rev.D74:123513,2006 | 10.1103/PhysRevD.74.123513 | null | gr-qc astro-ph | null | The covariant gauge invariant perturbation theory of scalar cosmological
perturbations is developed for a general Scalar-Tensor
Friedmann-Lemaitre-Robertson-Walker cosmology in a vacuum. The perturbation
equations are then solved exactly in the long wavelength limit for a specific
coupling, potential and background. ... | [
{
"created": "Wed, 22 Nov 2006 09:29:21 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Carloni",
"Sante",
""
],
[
"Dunsby",
"Peter K. S.",
""
],
[
"Rubano",
"Claudio",
""
]
] | The covariant gauge invariant perturbation theory of scalar cosmological perturbations is developed for a general Scalar-Tensor Friedmann-Lemaitre-Robertson-Walker cosmology in a vacuum. The perturbation equations are then solved exactly in the long wavelength limit for a specific coupling, potential and background. Di... |
2406.12281 | Gabriel Luis Dizon | Gabriel Luis Dizon (1) and Reinabelle Reyes (1) ((1) National
Institute of Physics, University of the Philippines - Diliman, Philippines) | Projected gravitational wave constraints on primordial black hole
abundance for extended mass distributions | 15 pages, 7 figures | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We investigate the projected minimum constraints set by next-generation
gravitational wave detectors Einstein Telescope and LISA on the abundance of
primordial black holes relative to dark matter for extended primordial black
hole mass distributions. We consider broad power law distributions for a range
of negative a... | [
{
"created": "Tue, 18 Jun 2024 05:19:17 GMT",
"version": "v1"
}
] | 2024-06-19 | [
[
"Dizon",
"Gabriel Luis",
""
],
[
"Reyes",
"Reinabelle",
""
]
] | We investigate the projected minimum constraints set by next-generation gravitational wave detectors Einstein Telescope and LISA on the abundance of primordial black holes relative to dark matter for extended primordial black hole mass distributions. We consider broad power law distributions for a range of negative and... |
1012.4216 | Muxin Han | Muxin Han | 4-dimensional Spin-foam Model with Quantum Lorentz Group | 23 pages, 3 figures, references added | J. Math. Phys. 52, 072501 (2011) | 10.1063/1.3606592 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the quantum group deformation of the Lorentzian EPRL spin-foam
model. The construction uses the harmonic analysis on the quantum Lorentz
group. We show that the quantum group spin-foam model so defined is free of the
infra-red divergence, thus gives a finite partition function on a fixed
triangulation. We ex... | [
{
"created": "Sun, 19 Dec 2010 23:06:15 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Dec 2010 10:38:06 GMT",
"version": "v2"
},
{
"created": "Sun, 23 Oct 2011 01:53:46 GMT",
"version": "v3"
}
] | 2011-10-25 | [
[
"Han",
"Muxin",
""
]
] | We study the quantum group deformation of the Lorentzian EPRL spin-foam model. The construction uses the harmonic analysis on the quantum Lorentz group. We show that the quantum group spin-foam model so defined is free of the infra-red divergence, thus gives a finite partition function on a fixed triangulation. We expe... |
1903.11519 | \"Ozg\"ur Akarsu | Ozgur Akarsu, John D. Barrow, Charles V. R. Board, N. Merve Uzun, J.
Alberto Vazquez | Screening $\Lambda$ in a new modified gravity model | 17 pages, 11 figures, 1 table; matches the version published in EPJC | Eur. Phys. J. C 79 (2019) 846 | 10.1140/epjc/s10052-019-7333-z | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a new model of Energy-Momentum Squared Gravity (EMSG), called
Energy-Momentum Log Gravity (EMLG), constructed by the addition of the term
$f(T_{\mu\nu}T^{\mu\nu})=\alpha \ln(\lambda\,T_{\mu\nu}T^{\mu\nu})$, envisaged
as a correction, to the Einstein-Hilbert action with cosmological constant
$\Lambda$. The ch... | [
{
"created": "Wed, 27 Mar 2019 16:15:59 GMT",
"version": "v1"
},
{
"created": "Sat, 30 Mar 2019 13:17:39 GMT",
"version": "v2"
},
{
"created": "Tue, 15 Oct 2019 13:36:23 GMT",
"version": "v3"
}
] | 2019-10-16 | [
[
"Akarsu",
"Ozgur",
""
],
[
"Barrow",
"John D.",
""
],
[
"Board",
"Charles V. R.",
""
],
[
"Uzun",
"N. Merve",
""
],
[
"Vazquez",
"J. Alberto",
""
]
] | We study a new model of Energy-Momentum Squared Gravity (EMSG), called Energy-Momentum Log Gravity (EMLG), constructed by the addition of the term $f(T_{\mu\nu}T^{\mu\nu})=\alpha \ln(\lambda\,T_{\mu\nu}T^{\mu\nu})$, envisaged as a correction, to the Einstein-Hilbert action with cosmological constant $\Lambda$. The choi... |
gr-qc/0007022 | S. Shankarnarayanan | S. Shankaranarayanan, K. Srinivasan, T. Padmanabhan | Method of complex paths and general covariance of Hawking radiation | 9 pages, uses MPLA Style file, Accepted for publication in Mod. Phys.
Letts. A | Mod.Phys.Lett. A16 (2001) 571-578 | 10.1142/S0217732301003632 | IUCAA Preprint 27/2000 - July 2000 | gr-qc hep-th | null | We apply the technique of complex paths to obtain Hawking radiation in
different coordinate representations of the Schwarzschild space-time. The
coordinate representations we consider do not possess a singularity at the
horizon unlike the standard Schwarzschild coordinate. However, the event
horizon manifests itself ... | [
{
"created": "Tue, 11 Jul 2000 17:30:47 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Mar 2001 15:22:57 GMT",
"version": "v2"
}
] | 2016-12-21 | [
[
"Shankaranarayanan",
"S.",
""
],
[
"Srinivasan",
"K.",
""
],
[
"Padmanabhan",
"T.",
""
]
] | We apply the technique of complex paths to obtain Hawking radiation in different coordinate representations of the Schwarzschild space-time. The coordinate representations we consider do not possess a singularity at the horizon unlike the standard Schwarzschild coordinate. However, the event horizon manifests itself as... |
1901.00813 | Annegret Burtscher | Annegret Burtscher, Michael K.-H. Kiessling, A. Shadi Tahvildar-Zadeh | Weak second Bianchi identity for static, spherically symmetric
spacetimes with timelike singularities | 23 pages; added Corollary 2.2, removed Appendix. Final version, to
appear in CQG | Classical and Quantum Gravity, Volume 38, Number 18 (2021),
185001, 31 pages | 10.1088/1361-6382/ac1853 | null | gr-qc math-ph math.AP math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The (twice-contracted) second Bianchi identity is a differential curvature
identity that holds on any smooth manifold with a metric. In the case when such
a metric is Lorentzian and solves Einstein's equations with an (in this case
inevitably smooth) energy-momentum-stress tensor of a "matter field" as the
source of ... | [
{
"created": "Thu, 3 Jan 2019 16:48:38 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Apr 2021 21:27:16 GMT",
"version": "v2"
},
{
"created": "Mon, 23 Aug 2021 13:29:42 GMT",
"version": "v3"
}
] | 2021-08-24 | [
[
"Burtscher",
"Annegret",
""
],
[
"Kiessling",
"Michael K. -H.",
""
],
[
"Tahvildar-Zadeh",
"A. Shadi",
""
]
] | The (twice-contracted) second Bianchi identity is a differential curvature identity that holds on any smooth manifold with a metric. In the case when such a metric is Lorentzian and solves Einstein's equations with an (in this case inevitably smooth) energy-momentum-stress tensor of a "matter field" as the source of sp... |
gr-qc/0604017 | Hannes Helgason | Emmanuel J. Candes, Philip R. Charlton and Hannes Helgason | Detecting Highly Oscillatory Signals by Chirplet Path Pursuit | null | Appl.Comput.Harmon.Anal.24:14-40,2008 | null | null | gr-qc math.ST stat.TH | null | This paper considers the problem of detecting nonstationary phenomena, and
chirps in particular, from very noisy data. Chirps are waveforms of the very
general form A(t) exp(i\lambda \phi(t)), where \lambda is a (large) base
frequency, the phase \phi(t) is time-varying and the amplitude A(t) is slowly
varying. Given ... | [
{
"created": "Wed, 5 Apr 2006 01:25:22 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Candes",
"Emmanuel J.",
""
],
[
"Charlton",
"Philip R.",
""
],
[
"Helgason",
"Hannes",
""
]
] | This paper considers the problem of detecting nonstationary phenomena, and chirps in particular, from very noisy data. Chirps are waveforms of the very general form A(t) exp(i\lambda \phi(t)), where \lambda is a (large) base frequency, the phase \phi(t) is time-varying and the amplitude A(t) is slowly varying. Given a ... |
1010.4512 | Thomas Buchert | Thomas Buchert and Nathaniel Obadia | Effective inhomogeneous inflation: curvature inhomogeneities of the
Einstein vacuum | 9 pages, 2 figures, to appear in Class. Quant. Grav. as Fast Track
Communication | Class.Quant.Grav.28:162002,2011 | 10.1088/0264-9381/28/16/162002 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider spatially averaged inhomogeneous universe models and argue that,
already in the absence of sources, an effective scalar field arises through
foliating and spatially averaging inhomogeneous geometrical curvature
invariants of the Einstein vacuum. This scalar field (the `morphon') acts as an
inflaton, if we... | [
{
"created": "Thu, 21 Oct 2010 16:16:38 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Jun 2011 10:58:14 GMT",
"version": "v2"
}
] | 2011-07-26 | [
[
"Buchert",
"Thomas",
""
],
[
"Obadia",
"Nathaniel",
""
]
] | We consider spatially averaged inhomogeneous universe models and argue that, already in the absence of sources, an effective scalar field arises through foliating and spatially averaging inhomogeneous geometrical curvature invariants of the Einstein vacuum. This scalar field (the `morphon') acts as an inflaton, if we p... |
gr-qc/9910084 | Matthias Arnsdorf | Matthias Arnsdorf | Approximating Connections in Loop Quantum Gravity | 12 pages, 2 figures | null | null | null | gr-qc | null | We discuss the action of the configuration operators of loop quantum gravity.
In particular, we derive the generalised eigenbasis for the Wilson loop
operator and show that the transformation between this basis and the
spin-network basis is given by an expansion in terms of Chebyshev polynomials.
These results are us... | [
{
"created": "Mon, 25 Oct 1999 11:41:46 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Arnsdorf",
"Matthias",
""
]
] | We discuss the action of the configuration operators of loop quantum gravity. In particular, we derive the generalised eigenbasis for the Wilson loop operator and show that the transformation between this basis and the spin-network basis is given by an expansion in terms of Chebyshev polynomials. These results are used... |
1307.1812 | Alexander Zhidenko | R. A. Konoplya and A. Zhidenko | A massive charged scalar field in the Kerr-Newman background I:
quasinormal modes, late-time tails and stability | 13 pages, 10 figures | Phys. Rev. D 88, 024054 (2013) | 10.1103/PhysRevD.88.024054 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | So far analysis of the quasinormal spectrum of a massive charged scalar field
in the black hole background has been limited by the regime of small \mu M and
qQ, where \mu, q (M, Q) are mass and charge of the field (black hole). Here we
shall present a comprehensive picture of quasinormal modes, late-time tails and
st... | [
{
"created": "Sat, 6 Jul 2013 19:56:33 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Aug 2013 15:49:11 GMT",
"version": "v2"
}
] | 2013-08-06 | [
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | So far analysis of the quasinormal spectrum of a massive charged scalar field in the black hole background has been limited by the regime of small \mu M and qQ, where \mu, q (M, Q) are mass and charge of the field (black hole). Here we shall present a comprehensive picture of quasinormal modes, late-time tails and stab... |
2405.09095 | Elliot Marshall | Florian Beyer, Elliot Marshall, Todd A. Oliynyk | Past instability of FLRW solutions of the Einstein-Euler-scalar field
equations for linear equations of state $p=K\rho$ with $0 \leq K<1/3$ | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using numerical methods, we examine, under a Gowdy symmetry assumption, the
dynamics of nonlinearly perturbed FLRW fluid solutions of the
Einstein-Euler-scalar field equations in the contracting direction for linear
equations of state $p = K\rho$ and sound speeds $0\leq K<1/3$. This article
builds upon the numerical ... | [
{
"created": "Wed, 15 May 2024 05:13:08 GMT",
"version": "v1"
}
] | 2024-05-16 | [
[
"Beyer",
"Florian",
""
],
[
"Marshall",
"Elliot",
""
],
[
"Oliynyk",
"Todd A.",
""
]
] | Using numerical methods, we examine, under a Gowdy symmetry assumption, the dynamics of nonlinearly perturbed FLRW fluid solutions of the Einstein-Euler-scalar field equations in the contracting direction for linear equations of state $p = K\rho$ and sound speeds $0\leq K<1/3$. This article builds upon the numerical wo... |
2301.02672 | Jakob Stegmann | Jakob Stegmann, Sander M. Vermeulen | Detecting the heterodyning of gravitational waves | 12 pages, 6 figures, 1 table | Classical and Quantum Gravity, Volume 41, Number 17 (2024) | 10.1088/1361-6382/ad682c | null | gr-qc astro-ph.HE astro-ph.IM astro-ph.SR | http://creativecommons.org/licenses/by-nc-sa/4.0/ | Gravitational waves modulate the apparent frequencies of other periodic
signals. Low-frequency gravitational waves could therefore be detected by
observing frequency modulations in signals from higher-frequency sources, e.g.,
those from binary white dwarfs detected with the LISA gravitational-wave
detector. We propos... | [
{
"created": "Fri, 6 Jan 2023 19:00:00 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Aug 2024 08:04:31 GMT",
"version": "v2"
}
] | 2024-08-09 | [
[
"Stegmann",
"Jakob",
""
],
[
"Vermeulen",
"Sander M.",
""
]
] | Gravitational waves modulate the apparent frequencies of other periodic signals. Low-frequency gravitational waves could therefore be detected by observing frequency modulations in signals from higher-frequency sources, e.g., those from binary white dwarfs detected with the LISA gravitational-wave detector. We propose ... |
1806.09162 | Nishanth Abu Gudapati | Nishanth Gudapati | A Conserved Energy for Axially Symmetric Newman-Penrose-Maxwell Scalars
on Kerr Black Holes | null | null | 10.1098/rspa.2018.0686 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that there exists a 1-parameter family of positive-definite and
conserved energy functionals for axially symmetric Newman-Penrose-Maxwell
scalars on the maximal spacelike hypersurfaces in the exterior of Kerr black
holes. It is also shown that the Poisson bracket within this 1-parameter family
of energies van... | [
{
"created": "Sun, 24 Jun 2018 15:21:47 GMT",
"version": "v1"
}
] | 2019-03-06 | [
[
"Gudapati",
"Nishanth",
""
]
] | We show that there exists a 1-parameter family of positive-definite and conserved energy functionals for axially symmetric Newman-Penrose-Maxwell scalars on the maximal spacelike hypersurfaces in the exterior of Kerr black holes. It is also shown that the Poisson bracket within this 1-parameter family of energies vanis... |
1509.05827 | Vasilis Oikonomou | V.K. Oikonomou | Singular Bouncing Cosmology from Gauss-Bonnet Modified Gravity | Significantly expanded perturbations section, important references
added, PRD accepted | Phys. Rev. D 92, 124027 (2015) | 10.1103/PhysRevD.92.124027 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study how a cosmological bounce with a Type IV singularity at the bouncing
point, can be generated by a classical vacuum $F(G)$ gravity. We focus our
investigation on the behavior of the vacuum $F(G)$ theory near the Type IV
singular bouncing point and also we address the stability of the resulting
solution, by tr... | [
{
"created": "Sat, 19 Sep 2015 00:05:55 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Nov 2015 21:28:23 GMT",
"version": "v2"
}
] | 2015-12-23 | [
[
"Oikonomou",
"V. K.",
""
]
] | We study how a cosmological bounce with a Type IV singularity at the bouncing point, can be generated by a classical vacuum $F(G)$ gravity. We focus our investigation on the behavior of the vacuum $F(G)$ theory near the Type IV singular bouncing point and also we address the stability of the resulting solution, by trea... |
1106.4225 | Matthew P. Masarik | Matthew P. Masarik | The Wave Equation in a General Spherically Symmetric Black Hole Geometry | Editorial revisions made to first version; this version contains no
substantive changes | null | null | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the Cauchy problem for the wave equation in a general class of
spherically symmetric black hole geometries. Under certain mild conditions on
the far-field decay and the singularity, we show that there is a unique
globally smooth solution to the Cauchy problem for the wave equation with data
compactly supp... | [
{
"created": "Tue, 21 Jun 2011 15:12:13 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Sep 2011 00:16:26 GMT",
"version": "v2"
}
] | 2011-09-14 | [
[
"Masarik",
"Matthew P.",
""
]
] | We consider the Cauchy problem for the wave equation in a general class of spherically symmetric black hole geometries. Under certain mild conditions on the far-field decay and the singularity, we show that there is a unique globally smooth solution to the Cauchy problem for the wave equation with data compactly suppor... |
gr-qc/9307007 | null | P.F. Gonz\'alez-D\'iaz | 2D dilaton-gravity from 5D Einstein equations | 9, IMAFF-Rc-04-93# | null | null | null | gr-qc | null | A semiclassical two-dimensional dilaton-gravity model is obtained by
dimensional reduction of the spherically symmetric five-dimensional Einstein
equations and used to investigate black hole evaporation. It is shown that this
model prevents the formation of naked singularity and allows spacetime
wormholes to contribu... | [
{
"created": "Fri, 9 Jul 1993 12:03:12 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Jul 1993 12:40:14 GMT",
"version": "v2"
}
] | 2016-08-14 | [
[
"González-Díaz",
"P. F.",
""
]
] | A semiclassical two-dimensional dilaton-gravity model is obtained by dimensional reduction of the spherically symmetric five-dimensional Einstein equations and used to investigate black hole evaporation. It is shown that this model prevents the formation of naked singularity and allows spacetime wormholes to contribute... |
gr-qc/0105104 | Hans-Juergen Schmidt | H.-J. Schmidt | Inhomogeneous Cosmological Models Containing Homogeneous Inner
Hypersurface Geometry. Changes of the Bianchi Type | 10 pages, LaTeX, 1 figure | Astron.Nachr.303:227-230,1982 | 10.1002/asna.2103030403 | UNIPO-MATH-01-May-23 | gr-qc | null | There are investigated such cosmological models which instead of the usual
spatial homogeneity property only fulfil the condition that in a certain
synchronized system of reference all spacelike sections t = const. are
homogeneous manifolds. This allows time-dependent changes of the BIANCHI type.
Discussing different... | [
{
"created": "Mon, 28 May 2001 07:30:58 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Schmidt",
"H. -J.",
""
]
] | There are investigated such cosmological models which instead of the usual spatial homogeneity property only fulfil the condition that in a certain synchronized system of reference all spacelike sections t = const. are homogeneous manifolds. This allows time-dependent changes of the BIANCHI type. Discussing differentia... |
1203.3766 | Michael Reiterer | Michael Reiterer (ETH Zurich), Eugene Trubowitz (ETH Zurich) | Choptuik's critical spacetime exists | 46 pages | Commun. Math. Phys. 368, 143-186 (2019) | 10.1007/s00220-019-03413-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | About twenty years ago, Choptuik studied numerically the gravitational
collapse (Einstein field equations) of a massless scalar field in spherical
symmetry, and found strong evidence for a universal, self-similar solution at
the threshold of black hole formation. We prove rigorously the existence of a
real analytic s... | [
{
"created": "Fri, 16 Mar 2012 17:14:00 GMT",
"version": "v1"
}
] | 2020-05-08 | [
[
"Reiterer",
"Michael",
"",
"ETH Zurich"
],
[
"Trubowitz",
"Eugene",
"",
"ETH Zurich"
]
] | About twenty years ago, Choptuik studied numerically the gravitational collapse (Einstein field equations) of a massless scalar field in spherical symmetry, and found strong evidence for a universal, self-similar solution at the threshold of black hole formation. We prove rigorously the existence of a real analytic sol... |
gr-qc/0605034 | Alfredo L\'opez Ortega | A. L\'opez-Ortega | Electromagnetic quasinormal modes of D-dimensional black holes | 24 pages, 1 figure. Some changes made according to referee's
suggestions. Matches published version in GRG | Gen.Rel.Grav.38:1747-1770,2006 | 10.1007/s10714-006-0358-2 | null | gr-qc | null | Using the monodromy method we calculate the asymptotic quasinormal (QN)
frequencies of an electromagnetic field moving in D-dimensional Schwarzschild
and Schwarzschild de Sitter (SdS) black holes ($D\geq 4$). For the
D-dimensional Schwarzschild anti-de Sitter (SadS) black hole we also compute
these frequencies with a... | [
{
"created": "Fri, 5 May 2006 19:37:13 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Nov 2006 09:45:33 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"López-Ortega",
"A.",
""
]
] | Using the monodromy method we calculate the asymptotic quasinormal (QN) frequencies of an electromagnetic field moving in D-dimensional Schwarzschild and Schwarzschild de Sitter (SdS) black holes ($D\geq 4$). For the D-dimensional Schwarzschild anti-de Sitter (SadS) black hole we also compute these frequencies with a s... |
2408.03725 | Yi Zhang | Xianfu Su, Dongze He, Yi Zhang | Two novel $f(Q)$ models | 10 pages, 4 figures | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/publicdomain/zero/1.0/ | We propose two novel models in the framework of $f(Q)$ gravity to explain our
accelerated universe, namely the exponential $f(Q)_{EXP}$ model and the
hyperbolic tangent $f(Q)_{HT}$ model. The current cosmological electromagnetic
observations including the cosmic microwave background anisotropies (CMB), the
baryon aco... | [
{
"created": "Wed, 7 Aug 2024 12:29:46 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Aug 2024 08:50:26 GMT",
"version": "v2"
}
] | 2024-08-09 | [
[
"Su",
"Xianfu",
""
],
[
"He",
"Dongze",
""
],
[
"Zhang",
"Yi",
""
]
] | We propose two novel models in the framework of $f(Q)$ gravity to explain our accelerated universe, namely the exponential $f(Q)_{EXP}$ model and the hyperbolic tangent $f(Q)_{HT}$ model. The current cosmological electromagnetic observations including the cosmic microwave background anisotropies (CMB), the baryon acous... |
2307.04073 | Arthur Garnier | Arthur Garnier | Motion equations in a Kerr-Newman-de Sitter spacetime: some methods of
integration and application to black holes shadowing in Scilab | null | Classical and Quantum Gravity, Volume 40, Number 13 (2023) | 10.1088/1361-6382/accbfe | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we recall some basic facts about the Kerr--Newman--(anti) de
Sitter (KNdS) spacetime and review several formulations and integration methods
for the geodesic equation of a test particle in such a spacetime. In
particular, we introduce some basic general symplectic integrators in the
Hamiltonian formali... | [
{
"created": "Sun, 9 Jul 2023 00:46:09 GMT",
"version": "v1"
}
] | 2023-07-11 | [
[
"Garnier",
"Arthur",
""
]
] | In this paper, we recall some basic facts about the Kerr--Newman--(anti) de Sitter (KNdS) spacetime and review several formulations and integration methods for the geodesic equation of a test particle in such a spacetime. In particular, we introduce some basic general symplectic integrators in the Hamiltonian formalism... |
2301.08421 | Jian-Pin Wu | Guoyang Fu, Dan Zhang, Peng Liu, Xiao-Mei Kuang, Jian-Pin Wu | Peculiar properties in quasi-normal spectra from loop quantum gravity
effect | 33 pages,10 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the quasi-normal mode (QNM) spectra for scalar and
electromagnetic fields over a covairant loop quantum gravity black hole
(LQG-BH). For the fundamental modes, the LQG effect reduces the oscillations in
the scalar field, however it induces stronger oscillations in the
electromagnetic field, comparing t... | [
{
"created": "Fri, 20 Jan 2023 04:35:46 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Nov 2023 02:19:54 GMT",
"version": "v2"
}
] | 2023-11-22 | [
[
"Fu",
"Guoyang",
""
],
[
"Zhang",
"Dan",
""
],
[
"Liu",
"Peng",
""
],
[
"Kuang",
"Xiao-Mei",
""
],
[
"Wu",
"Jian-Pin",
""
]
] | We investigate the quasi-normal mode (QNM) spectra for scalar and electromagnetic fields over a covairant loop quantum gravity black hole (LQG-BH). For the fundamental modes, the LQG effect reduces the oscillations in the scalar field, however it induces stronger oscillations in the electromagnetic field, comparing to ... |
1010.2777 | Geoffrey Lovelace | Geoffrey Lovelace, Mark A. Scheel, and Bela Szilagyi | Simulating merging binary black holes with nearly extremal spins | 4 pages, 2 figures, updated with version accepted for publication in
Phys. Rev. D, removed a plot that was incorrectly included at the end of the
article in version v2 | Phys.Rev.D83:024010,2011 | 10.1103/PhysRevD.83.024010 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Astrophysically realistic black holes may have spins that are nearly extremal
(i.e., close to 1 in dimensionless units). Numerical simulations of binary
black holes are important tools both for calibrating analytical templates for
gravitational-wave detection and for exploring the nonlinear dynamics of curved
spaceti... | [
{
"created": "Wed, 13 Oct 2010 21:13:40 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jan 2011 15:51:03 GMT",
"version": "v2"
},
{
"created": "Tue, 11 Jan 2011 04:47:15 GMT",
"version": "v3"
}
] | 2015-03-17 | [
[
"Lovelace",
"Geoffrey",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Szilagyi",
"Bela",
""
]
] | Astrophysically realistic black holes may have spins that are nearly extremal (i.e., close to 1 in dimensionless units). Numerical simulations of binary black holes are important tools both for calibrating analytical templates for gravitational-wave detection and for exploring the nonlinear dynamics of curved spacetime... |
0904.3810 | Ryuichi Fujita | Ryuichi Fujita, Wataru Hikida and Hideyuki Tagoshi | An Efficient Numerical Method for Computing Gravitational Waves Induced
by a Particle Moving on Eccentric Inclined Orbits around a Kerr Black Hole | Reference added in section 1 | Prog. Theor. Phys.121:843-874, 2009 | 10.1143/PTP.121.843 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a numerical code to compute gravitational waves induced by a
particle moving on eccentric inclined orbits around a Kerr black hole. For such
systems, the black hole perturbation method is applicable. The gravitational
waves can be evaluated by solving the Teukolsky equation with a point like
source term, w... | [
{
"created": "Fri, 24 Apr 2009 07:27:26 GMT",
"version": "v1"
},
{
"created": "Wed, 20 May 2009 11:26:59 GMT",
"version": "v2"
}
] | 2009-08-05 | [
[
"Fujita",
"Ryuichi",
""
],
[
"Hikida",
"Wataru",
""
],
[
"Tagoshi",
"Hideyuki",
""
]
] | We develop a numerical code to compute gravitational waves induced by a particle moving on eccentric inclined orbits around a Kerr black hole. For such systems, the black hole perturbation method is applicable. The gravitational waves can be evaluated by solving the Teukolsky equation with a point like source term, whi... |
gr-qc/0702108 | Hamid Reza Sepangi | N. Khosravi, S. Jalalzadeh and H. R. Sepangi | Stabilization of internal space in noncommutative multidimensional
cosmology | 8 pages, 1 figure, to appear in IJMPD | Int.J.Mod.PHys.D16:1187-1196,2007 | 10.1142/S0218271807010651 | null | gr-qc hep-th | null | We study the cosmological aspects of a noncommutative, multidimensional
universe where the matter source is assumed to be a scalar field which does not
commute with the internal scale factor. We show that such noncommutativity
results in the internal dimensions being stabilized
| [
{
"created": "Tue, 20 Feb 2007 06:53:49 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Khosravi",
"N.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | We study the cosmological aspects of a noncommutative, multidimensional universe where the matter source is assumed to be a scalar field which does not commute with the internal scale factor. We show that such noncommutativity results in the internal dimensions being stabilized |
0704.1457 | T. Damour | Thibault Damour | Chaos and Symmetry in String Cosmology | 14 pages, one diagram; invited talk at the 11th Marcel Grossmann
Meeting on Recent Developments in General Relativity, Berlin, Germany, 23-29
July 2006 | null | 10.1142/9789812834300_0003 | null | gr-qc | null | We review the recently discovered interplay between chaos and symmetry in the
general inhomogeneous solution of many string-related Einstein-matter systems
in the vicinity of a cosmological singularity. The
Belinsky-Khalatnikov-Lifshitz-type chaotic behaviour is found, for many
Einstein-matter models (notably those r... | [
{
"created": "Wed, 11 Apr 2007 17:10:40 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Damour",
"Thibault",
""
]
] | We review the recently discovered interplay between chaos and symmetry in the general inhomogeneous solution of many string-related Einstein-matter systems in the vicinity of a cosmological singularity. The Belinsky-Khalatnikov-Lifshitz-type chaotic behaviour is found, for many Einstein-matter models (notably those rel... |
1009.1727 | Tom\'a\v{s} M\'alek | Tom\'a\v{s} M\'alek, Vojt\v{e}ch Pravda | Kerr-Schild spacetimes with (A)dS background | 17 pages, minor changes | Class. Quantum Grav.28:125011, 2011;
Class.Quant.Grav.28:125011,2011 | 10.1088/0264-9381/28/12/125011 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General properties of Kerr-Schild spacetimes with (A)dS background in
arbitrary dimension are studied. It is shown that the geodetic Kerr-Schild
vector k is a multiple WAND of the spacetime. Einstein Kerr-Schild spacetimes
with non-expanding k are shown to be of Weyl type N, while the expanding
spacetimes are of type... | [
{
"created": "Thu, 9 Sep 2010 10:20:36 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jan 2011 18:15:35 GMT",
"version": "v2"
},
{
"created": "Thu, 12 May 2011 10:04:18 GMT",
"version": "v3"
}
] | 2011-05-13 | [
[
"Málek",
"Tomáš",
""
],
[
"Pravda",
"Vojtěch",
""
]
] | General properties of Kerr-Schild spacetimes with (A)dS background in arbitrary dimension are studied. It is shown that the geodetic Kerr-Schild vector k is a multiple WAND of the spacetime. Einstein Kerr-Schild spacetimes with non-expanding k are shown to be of Weyl type N, while the expanding spacetimes are of type I... |
gr-qc/9910077 | Janos Kannar | H. Friedrich and J. Kannar | Bondi-type systems near space-like infinity and the calculation of the
NP-constants | 35 pages | J.Math.Phys. 41 (2000) 2195-2232 | 10.1063/1.533235 | null | gr-qc | null | We relate Bondi systems near space-like infinity to another type of gauge
conditions. While the former are based on null infinity, the latter are defined
in terms of Einstein propagation, the conformal structure, and data on some
Cauchy hypersurface. For a certain class of time symmetric space-times we study
an expan... | [
{
"created": "Fri, 22 Oct 1999 12:55:48 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Friedrich",
"H.",
""
],
[
"Kannar",
"J.",
""
]
] | We relate Bondi systems near space-like infinity to another type of gauge conditions. While the former are based on null infinity, the latter are defined in terms of Einstein propagation, the conformal structure, and data on some Cauchy hypersurface. For a certain class of time symmetric space-times we study an expansi... |
2402.02424 | Tayyab Naseer | M. Sharif, Tayyab Naseer | Influence of $f(\mathcal{R},\mathcal{T},\mathcal{Q})$ Gravity on
Cylindrical Collapse | 23 pages, no figure | Indian J. Phys. 97(2023)2853-2863 | 10.1007/s12648-023-02630-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article examines the dynamics of gravitational collapse in
$f(\mathcal{R},\mathcal{T},\mathcal{Q})$ gravity, where
$\mathcal{Q}=\mathcal{R}_{\mathrm{ab}}\mathcal{T}^{\mathrm{ab}}$. We consider
self-gravitating anisotropic cylindrical geometry whose interior is filled with
dissipative matter configuration and mat... | [
{
"created": "Sun, 4 Feb 2024 09:40:52 GMT",
"version": "v1"
}
] | 2024-02-06 | [
[
"Sharif",
"M.",
""
],
[
"Naseer",
"Tayyab",
""
]
] | This article examines the dynamics of gravitational collapse in $f(\mathcal{R},\mathcal{T},\mathcal{Q})$ gravity, where $\mathcal{Q}=\mathcal{R}_{\mathrm{ab}}\mathcal{T}^{\mathrm{ab}}$. We consider self-gravitating anisotropic cylindrical geometry whose interior is filled with dissipative matter configuration and match... |
gr-qc/0103030 | Sergio Dain | Sergio Dain | Initial data for a head on collision of two Kerr-like black holes with
close limit | 15 pages, no figures, Latex2e | Phys.Rev. D64 (2001) 124002 | 10.1103/PhysRevD.64.124002 | null | gr-qc | null | We prove the existence of a family of initial data for the Einstein vacuum
equation which can be interpreted as the data for two Kerr-like black holes in
arbitrary location and with spin in arbitrary direction. This family of initial
data has the following properties: (i) When the mass parameter of one of them
is zer... | [
{
"created": "Fri, 9 Mar 2001 14:58:19 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Dain",
"Sergio",
""
]
] | We prove the existence of a family of initial data for the Einstein vacuum equation which can be interpreted as the data for two Kerr-like black holes in arbitrary location and with spin in arbitrary direction. This family of initial data has the following properties: (i) When the mass parameter of one of them is zero ... |
0807.0854 | Marcus Werner | G W Gibbons, M C Werner | Applications of the Gauss-Bonnet theorem to gravitational lensing | 10 pages, 1 figure, IoP style | Class.Quant.Grav.25:235009,2008 | 10.1088/0264-9381/25/23/235009 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this geometrical approach to gravitational lensing theory, we apply the
Gauss-Bonnet theorem to the optical metric of a lens, modelled as a static,
spherically symmetric, perfect non-relativistic fluid, in the weak deflection
limit. We find that the focusing of the light rays emerges here as a
topological effect, ... | [
{
"created": "Sat, 5 Jul 2008 12:24:21 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Gibbons",
"G W",
""
],
[
"Werner",
"M C",
""
]
] | In this geometrical approach to gravitational lensing theory, we apply the Gauss-Bonnet theorem to the optical metric of a lens, modelled as a static, spherically symmetric, perfect non-relativistic fluid, in the weak deflection limit. We find that the focusing of the light rays emerges here as a topological effect, an... |
1210.1485 | Florian Girelli | Florian Girelli, Franz Hinterleitner and Seth A. Major | Loop Quantum Gravity Phenomenology: Linking Loops to Observational
Physics | Invited review for SIGMA Special Issue "Loop Quantum Gravity and
Cosmology" | SIGMA 8 (2012), 098, 73 pages | 10.3842/SIGMA.2012.098 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/3.0/ | Research during the last decade demonstrates that effects originating on the
Planck scale are currently being tested in multiple observational contexts. In
this review we discuss quantum gravity phenomenological models and their
possible links to loop quantum gravity. Particle frameworks, including
kinematic models, ... | [
{
"created": "Thu, 4 Oct 2012 15:26:17 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Dec 2012 06:22:50 GMT",
"version": "v2"
}
] | 2012-12-14 | [
[
"Girelli",
"Florian",
""
],
[
"Hinterleitner",
"Franz",
""
],
[
"Major",
"Seth A.",
""
]
] | Research during the last decade demonstrates that effects originating on the Planck scale are currently being tested in multiple observational contexts. In this review we discuss quantum gravity phenomenological models and their possible links to loop quantum gravity. Particle frameworks, including kinematic models, br... |
1404.1435 | Chul-Moon Yoo | Chul-Moon Yoo and Hirotada Okawa | Black Hole Universe with $\Lambda$ | 14 pages, 9 figures | Phys. Rev. D 89, 123502 (2014) | 10.1103/PhysRevD.89.123502 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Time evolution of a black hole lattice universe with a positive cosmological
constant $\Lambda$ is simulated. The vacuum Einstein equations are numerically
solved in a cubic box with a black hole in the center. Periodic boundary
conditions on all pairs of opposite faces are imposed. Configurations of
marginally trapp... | [
{
"created": "Sat, 5 Apr 2014 05:27:18 GMT",
"version": "v1"
}
] | 2014-06-11 | [
[
"Yoo",
"Chul-Moon",
""
],
[
"Okawa",
"Hirotada",
""
]
] | Time evolution of a black hole lattice universe with a positive cosmological constant $\Lambda$ is simulated. The vacuum Einstein equations are numerically solved in a cubic box with a black hole in the center. Periodic boundary conditions on all pairs of opposite faces are imposed. Configurations of marginally trapped... |
1303.2410 | Michel Miranda | Galaxia Miranda, Tonatiuh Matos and Nadiezhda Motelongo Garc\'ia | Kerr-Like Phantom Wormhole | null | Gen. Rel. Grav. 46, (2014), 1613 | 10.1007/s10714-013-1613-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study a Kerr-like wormhole with phantom matter as source. It
has three parameters: mass, angular momentum and scalar field charge. This
wormhole has a naked ring singularity, other wise it is regular everywhere. The
mean feature of this wormhole is that the mouth of the throat lie on a sphere
of the s... | [
{
"created": "Mon, 11 Mar 2013 02:13:19 GMT",
"version": "v1"
}
] | 2021-02-09 | [
[
"Miranda",
"Galaxia",
""
],
[
"Matos",
"Tonatiuh",
""
],
[
"García",
"Nadiezhda Motelongo",
""
]
] | In this work we study a Kerr-like wormhole with phantom matter as source. It has three parameters: mass, angular momentum and scalar field charge. This wormhole has a naked ring singularity, other wise it is regular everywhere. The mean feature of this wormhole is that the mouth of the throat lie on a sphere of the sam... |
2110.00722 | Sebastian Murk | Pravin K. Dahal, Sebastian Murk, Daniel R. Terno | Semiclassical black holes and horizon singularities | 12 pages, 3 figures. Published version. Invited contribution to the
special topic collection "Celebrating Sir Roger Penrose's Nobel Prize"
published in AVS Quantum Science. Comments welcome! | AVS Quantum Sci. 4, 015606 (2022) | 10.1116/5.0073598 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In spherical symmetry, solutions of the semiclassical Einstein equations
belong to one of two possible classes. Both classes contain solutions that --
depending on the dynamic behavior of the horizon -- describe evaporating
physical black holes or expanding white holes (trapped/anti-trapped regions
that form in finit... | [
{
"created": "Sat, 2 Oct 2021 04:02:44 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Dec 2021 10:29:10 GMT",
"version": "v2"
},
{
"created": "Wed, 9 Mar 2022 11:22:00 GMT",
"version": "v3"
}
] | 2022-03-10 | [
[
"Dahal",
"Pravin K.",
""
],
[
"Murk",
"Sebastian",
""
],
[
"Terno",
"Daniel R.",
""
]
] | In spherical symmetry, solutions of the semiclassical Einstein equations belong to one of two possible classes. Both classes contain solutions that -- depending on the dynamic behavior of the horizon -- describe evaporating physical black holes or expanding white holes (trapped/anti-trapped regions that form in finite ... |
gr-qc/0509121 | Brendan Foster | Brendan Z. Foster | Noether charges and black hole mechanics in Einstein-aether theory | 14 pages; v2: minor comments added | Phys.Rev. D73 (2006) 024005 | 10.1103/PhysRevD.73.024005 | null | gr-qc hep-th | null | The Noether charge method for defining the Hamiltonian of a
diffeomorphism-invariant field theory is applied to "Einstein-aether" theory,
in which gravity couples to a dynamical, timelike, unit-norm vector field.
Using the method, expressions are obtained for the total energy, momentum, and
angular momentum of an Ein... | [
{
"created": "Thu, 29 Sep 2005 19:10:03 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Dec 2005 20:30:56 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Foster",
"Brendan Z.",
""
]
] | The Noether charge method for defining the Hamiltonian of a diffeomorphism-invariant field theory is applied to "Einstein-aether" theory, in which gravity couples to a dynamical, timelike, unit-norm vector field. Using the method, expressions are obtained for the total energy, momentum, and angular momentum of an Einst... |
1111.3167 | Pedro Fraz\~ao | Orfeu Bertolami, Pedro Fraz\~ao, Jorge P\'aramos | Mimicking dark matter in galaxy clusters through a non-minimal
gravitational coupling with matter | 15 pages, 19 figures; published version | Phys. Rev. D 86, 044034 (2012) | 10.1103/PhysRevD.86.044034 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, one shows that a specific non-minimal coupling between the
scalar curvature and matter can mimic the dark matter component of galaxy
clusters. For this purpose, one assesses the Abell cluster A586, a massive
nearby relaxed cluster of galaxies in virial equilibrium, where direct mass
estimates and strong... | [
{
"created": "Mon, 14 Nov 2011 10:41:17 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Jan 2013 17:58:09 GMT",
"version": "v2"
}
] | 2013-01-31 | [
[
"Bertolami",
"Orfeu",
""
],
[
"Frazão",
"Pedro",
""
],
[
"Páramos",
"Jorge",
""
]
] | In this work, one shows that a specific non-minimal coupling between the scalar curvature and matter can mimic the dark matter component of galaxy clusters. For this purpose, one assesses the Abell cluster A586, a massive nearby relaxed cluster of galaxies in virial equilibrium, where direct mass estimates and strong-l... |
1903.10496 | David D. K. Chow | David D. K. Chow | Characterization of three-dimensional Lorentzian metrics that admit four
Killing vectors | 15 pages | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider three-dimensional Lorentzian metrics that locally admit four
independent Killing vectors. Their classification is summarized, and conditions
for characterizing them are found. These consist of algebraic classification of
the traceless Ricci tensor, and other conditions satisfied by the curvature and
its d... | [
{
"created": "Mon, 25 Mar 2019 17:52:57 GMT",
"version": "v1"
}
] | 2019-03-26 | [
[
"Chow",
"David D. K.",
""
]
] | We consider three-dimensional Lorentzian metrics that locally admit four independent Killing vectors. Their classification is summarized, and conditions for characterizing them are found. These consist of algebraic classification of the traceless Ricci tensor, and other conditions satisfied by the curvature and its der... |
2404.17904 | Faisal Javed | G. Mustafa, Faisal Javed, Arfa Waseem, S.K. Maurya, Ghulam Fatima | Imprints of dark energy models on structural properties of charged
gravastars in extended teleparallel gravity | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A gravastar comprises three distinct sections: the interior zone, the middle
shell, and its outer region. By considering a specific extended teleparallel
gravity model that incorporates conformal Killing vectors and provides the
field equations. We observe that the interior part exhibits a repellent force
acting on t... | [
{
"created": "Sat, 27 Apr 2024 13:26:41 GMT",
"version": "v1"
}
] | 2024-04-30 | [
[
"Mustafa",
"G.",
""
],
[
"Javed",
"Faisal",
""
],
[
"Waseem",
"Arfa",
""
],
[
"Maurya",
"S. K.",
""
],
[
"Fatima",
"Ghulam",
""
]
] | A gravastar comprises three distinct sections: the interior zone, the middle shell, and its outer region. By considering a specific extended teleparallel gravity model that incorporates conformal Killing vectors and provides the field equations. We observe that the interior part exhibits a repellent force acting on the... |
2405.13096 | Esmaeil Ebrahimi | Esmaeil Ebrahimi, Ahmad Sheykhi | Ghost Dark Energy in Tsallis and Barrow Cosmology | 14 pages, 31 figures | Published in: Phys.Dark Univ. 45 (2024) 101518 | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | According to the thermodynamics-gravity conjecture, any modification to the
entropy expression leads to the modified cosmological field equations. Based on
this, we investigate the cosmological consequences of the modified Friedmann
equations when the entropy associated with the horizon is in the form of
Tsallis/Barr... | [
{
"created": "Tue, 21 May 2024 13:58:28 GMT",
"version": "v1"
}
] | 2024-05-24 | [
[
"Ebrahimi",
"Esmaeil",
""
],
[
"Sheykhi",
"Ahmad",
""
]
] | According to the thermodynamics-gravity conjecture, any modification to the entropy expression leads to the modified cosmological field equations. Based on this, we investigate the cosmological consequences of the modified Friedmann equations when the entropy associated with the horizon is in the form of Tsallis/Barrow... |
1004.3102 | Pedro Montero | Pedro J. Montero, Jose A. Font and Masaru Shibata | Influence of self-gravity on the runaway instability of black hole-torus
systems | To appear on Phys.Rev.Lett | Phys.Rev.Lett.104:191101,2010 | 10.1103/PhysRevLett.104.191101 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Results from the first fully general relativistic numerical simulations in
axisymmetry of a system formed by a black hole surrounded by a self-gravitating
torus in equilibrium are presented, aiming to assess the influence of the torus
self-gravity on the onset of the runaway instability. We consider several
models wi... | [
{
"created": "Mon, 19 Apr 2010 06:22:47 GMT",
"version": "v1"
}
] | 2010-05-25 | [
[
"Montero",
"Pedro J.",
""
],
[
"Font",
"Jose A.",
""
],
[
"Shibata",
"Masaru",
""
]
] | Results from the first fully general relativistic numerical simulations in axisymmetry of a system formed by a black hole surrounded by a self-gravitating torus in equilibrium are presented, aiming to assess the influence of the torus self-gravity on the onset of the runaway instability. We consider several models with... |
1308.1859 | Julio Cesar Fabris | J.C. Fabris, O.F. Piattella, I.G. Salako, J. Tossa, H.E.S. Velten | A note on acoustic black holes in neo-Newtonian theory | Latex file, 10 pages. Some discussions extended. Accepted for
publication in MPLA | Modern Physics Letters A28, 1350169(2013) | 10.1142/S0217732313501691 | null | gr-qc astro-ph.HE hep-th physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Newtonian fluid dynamics allows the construction of acoustic metrics from
which black hole configurations can be studied. However, relativistic pressure
effects are neglected within Newtonian theory. We study acoustic black holes in
the framework of neo-Newtonian hydrodynamics, which is designed to take into
account ... | [
{
"created": "Thu, 8 Aug 2013 14:15:01 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Oct 2013 14:21:39 GMT",
"version": "v2"
}
] | 2015-06-16 | [
[
"Fabris",
"J. C.",
""
],
[
"Piattella",
"O. F.",
""
],
[
"Salako",
"I. G.",
""
],
[
"Tossa",
"J.",
""
],
[
"Velten",
"H. E. S.",
""
]
] | Newtonian fluid dynamics allows the construction of acoustic metrics from which black hole configurations can be studied. However, relativistic pressure effects are neglected within Newtonian theory. We study acoustic black holes in the framework of neo-Newtonian hydrodynamics, which is designed to take into account re... |
1210.0730 | Timothy Clifton | Timothy Clifton, Peter Dunsby, Rituparno Goswami and Anne Marie Nzioki | On the absence of the usual weak-field limit, and the impossibility of
embedding some known solutions for isolated masses in cosmologies with f(R)
dark energy | 12 pages. Corrections made in Eqs. (6)-(9) | Phys. Rev. D 87, 063517 (2013) | 10.1103/PhysRevD.87.063517 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of matching different regions of spacetime in order to construct
inhomogeneous cosmological models is investigated in the context of Lagrangian
theories of gravity constructed from general analytic functions f(R), and from
non-analytic theories with f(R)=R^n. In all of the cases studied, we find that
it i... | [
{
"created": "Tue, 2 Oct 2012 10:50:08 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Mar 2013 10:28:03 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Apr 2013 14:05:36 GMT",
"version": "v3"
}
] | 2013-04-24 | [
[
"Clifton",
"Timothy",
""
],
[
"Dunsby",
"Peter",
""
],
[
"Goswami",
"Rituparno",
""
],
[
"Nzioki",
"Anne Marie",
""
]
] | The problem of matching different regions of spacetime in order to construct inhomogeneous cosmological models is investigated in the context of Lagrangian theories of gravity constructed from general analytic functions f(R), and from non-analytic theories with f(R)=R^n. In all of the cases studied, we find that it is ... |
2306.12234 | Hippolyte Quelquejay Leclere | Hippolyte Quelquejay Leclere, Pierre Auclair, Stanislav Babak,
Aur\'elien Chalumeau, Dani\`ele A. Steer, J. Antoniadis, A.-S. Bak Nielsen,
C. G. Bassa, A. Berthereau, M. Bonetti, E. Bortolas, P. R. Brook, M. Burgay,
R. N. Caballero, D. J. Champion, S. Chanlaridis, S. Chen, I. Cognard, G.
Desvignes, M. Falxa, R.... | Practical approaches to analyzing PTA data: Cosmic strings with six
pulsars | 14 pages, 6 figures; typo corrected in (5) | Phys. Rev. D 108 (2023), 123527 | 10.1103/PhysRevD.108.123527 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We search for a stochastic gravitational wave background (SGWB) generated by
a network of cosmic strings using six millisecond pulsars from Data Release 2
(DR2) of the European Pulsar Timing Array (EPTA). We perform a Bayesian
analysis considering two models for the network of cosmic string loops, and
compare it to a... | [
{
"created": "Wed, 21 Jun 2023 12:53:02 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Dec 2023 17:00:31 GMT",
"version": "v2"
},
{
"created": "Fri, 3 May 2024 09:58:29 GMT",
"version": "v3"
}
] | 2024-05-06 | [
[
"Leclere",
"Hippolyte Quelquejay",
""
],
[
"Auclair",
"Pierre",
""
],
[
"Babak",
"Stanislav",
""
],
[
"Chalumeau",
"Aurélien",
""
],
[
"Steer",
"Danièle A.",
""
],
[
"Antoniadis",
"J.",
""
],
[
"Nielsen",
"A. -... | We search for a stochastic gravitational wave background (SGWB) generated by a network of cosmic strings using six millisecond pulsars from Data Release 2 (DR2) of the European Pulsar Timing Array (EPTA). We perform a Bayesian analysis considering two models for the network of cosmic string loops, and compare it to a s... |
1309.4756 | Alberto Diez-Tejedor | Alberto Diez-Tejedor | Note on scalars, perfect fluids, constrained field theories, and all
that | 5 pages, 1 figure. Accepted for publication in Phys. Lett. B | Phys. Lett. B 727, 27-30 (2013) | 10.1016/j.physletb.2013.10.030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The relation of a scalar field with a perfect fluid has generated some debate
along the last few years. In this paper we argue that shift-invariant scalar
fields can describe accurately the potential flow of an isentropic perfect
fluid, but, in general, the identification is possible only for a finite period
of time.... | [
{
"created": "Wed, 18 Sep 2013 19:19:24 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Nov 2013 22:24:32 GMT",
"version": "v2"
}
] | 2013-11-22 | [
[
"Diez-Tejedor",
"Alberto",
""
]
] | The relation of a scalar field with a perfect fluid has generated some debate along the last few years. In this paper we argue that shift-invariant scalar fields can describe accurately the potential flow of an isentropic perfect fluid, but, in general, the identification is possible only for a finite period of time. A... |
1009.3225 | Lorenzo Iorio | L. Iorio, H.I.M. Lichtenegger, M.L. Ruggiero, C. Corda | Phenomenology of the Lense-Thirring effect in the Solar System | LaTex, 51 pages, 14 figures, 22 tables. Invited review, to appear in
Astrophysics and Space Science (ApSS). Some uncited references in the text
now correctly quoted. One reference added. A footnote added | Astrophys. Space Sci. 331:351-395, 2011 | 10.1007/s10509-010-0489-5 | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent years have seen increasing efforts to directly measure some aspects of
the general relativistic gravitomagnetic interaction in several astronomical
scenarios in the solar system. After briefly overviewing the concept of
gravitomagnetism from a theoretical point of view, we review the performed or
proposed atte... | [
{
"created": "Thu, 16 Sep 2010 17:15:17 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Sep 2010 16:27:21 GMT",
"version": "v2"
}
] | 2011-01-04 | [
[
"Iorio",
"L.",
""
],
[
"Lichtenegger",
"H. I. M.",
""
],
[
"Ruggiero",
"M. L.",
""
],
[
"Corda",
"C.",
""
]
] | Recent years have seen increasing efforts to directly measure some aspects of the general relativistic gravitomagnetic interaction in several astronomical scenarios in the solar system. After briefly overviewing the concept of gravitomagnetism from a theoretical point of view, we review the performed or proposed attemp... |
1811.02289 | Saulo Carneiro | J. A. de Freitas Pacheco, S. Carneiro and J. C. Fabris | Gravitational waves from binary axionic black holes | 6 pages, 2 figures. Version to appear in Eur. Phys. J. C | Eur. Phys. J. C (2019) 79: 426 | 10.1140/epjc/s10052-019-6940-z | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent paper we have shown that a minimally coupled, self-interacting
scalar field of mass $m$ can form black holes of mass $M=\sqrt{3}/(4m)$ (in
Planck units). If dark matter is composed by axions, they can form miniclusters
that for QCD axions have masses below this value. In this work it is shown that
for a s... | [
{
"created": "Tue, 6 Nov 2018 11:18:59 GMT",
"version": "v1"
},
{
"created": "Fri, 17 May 2019 18:15:51 GMT",
"version": "v2"
}
] | 2019-05-23 | [
[
"Pacheco",
"J. A. de Freitas",
""
],
[
"Carneiro",
"S.",
""
],
[
"Fabris",
"J. C.",
""
]
] | In a recent paper we have shown that a minimally coupled, self-interacting scalar field of mass $m$ can form black holes of mass $M=\sqrt{3}/(4m)$ (in Planck units). If dark matter is composed by axions, they can form miniclusters that for QCD axions have masses below this value. In this work it is shown that for a sce... |
2001.07081 | Serhii E. Samokhvalov | S. E. Samokhvalov | About the symmetry of general relativity | 29 pages, references added, typos corrected, version accepted in JGSP | J. Geom. Symmetry Phys. 55 (2020), 75--103 | 10.7546/jgsp-55-2020-75-103 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we use generalized deformed gauge groups for investigation of
symmetry of general relativity (GR). GR is formulated in generalized reference
frames, which are represented by (anholonomic in general case) affine frame
fields. The general principle of relativity is extended to the requirement of
invariance... | [
{
"created": "Mon, 20 Jan 2020 12:36:38 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Apr 2020 03:17:55 GMT",
"version": "v2"
},
{
"created": "Sat, 25 Apr 2020 08:44:11 GMT",
"version": "v3"
}
] | 2020-06-09 | [
[
"Samokhvalov",
"S. E.",
""
]
] | In this work we use generalized deformed gauge groups for investigation of symmetry of general relativity (GR). GR is formulated in generalized reference frames, which are represented by (anholonomic in general case) affine frame fields. The general principle of relativity is extended to the requirement of invariance o... |
gr-qc/9910062 | Murat Ozer | Murat \"Ozer | On the Equivalence Principle and a Unified Description of Gravitation
and Electromagnetism | A new argument that produces the $g_{00}$ of the metric outside a
charged sphere is presented. Existing experimental evidences for the
electromagnetic equivalence principle introduced are pointed out. A new
footnote has been added | null | null | null | gr-qc astro-ph hep-ph math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We first investigate the form the General Relativity Theory would have taken
had the gravitational mass and the inertial mass of material objects been
different. We then extend this analysis to electromagnetism and postulate an
equivalence principle for the electromagnetic field. We argue that to each
particle with a... | [
{
"created": "Tue, 19 Oct 1999 12:26:32 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Oct 1999 15:44:53 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Feb 2000 17:17:13 GMT",
"version": "v3"
},
{
"created": "Mon, 18 Dec 2017 11:09:09 GMT",
"version": "v4"
},
{
"c... | 2020-01-09 | [
[
"Özer",
"Murat",
""
]
] | We first investigate the form the General Relativity Theory would have taken had the gravitational mass and the inertial mass of material objects been different. We then extend this analysis to electromagnetism and postulate an equivalence principle for the electromagnetic field. We argue that to each particle with a d... |
gr-qc/0510030 | Peter D'Eath | A.N.St.J.Farley and P.D.D'Eath | Spin-1 Amplitudes in Black-Hole Evaporation | null | null | 10.1088/0264-9381/22/14/010 | null | gr-qc | null | Our earlier work on the quantum amplitude for a scalar field in black-hole
evaporation, following gravitational collapse, is here extended to Maxwell
theory. Boundary data are specified on initial and final space-like
hypersurfaces $\Sigma_{I,F}$, separated by a large Lorentzian proper-time
interval $T$, as measured ... | [
{
"created": "Fri, 7 Oct 2005 17:28:40 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Farley",
"A. N. St. J.",
""
],
[
"D'Eath",
"P. D.",
""
]
] | Our earlier work on the quantum amplitude for a scalar field in black-hole evaporation, following gravitational collapse, is here extended to Maxwell theory. Boundary data are specified on initial and final space-like hypersurfaces $\Sigma_{I,F}$, separated by a large Lorentzian proper-time interval $T$, as measured at... |
1605.05066 | Lavinia Heisenberg | Antonio De Felice, Lavinia Heisenberg, Ryotaro Kase, Shinji Mukohyama,
Shinji Tsujikawa and Ying-li Zhang | Effective gravitational couplings for cosmological perturbations in
generalized Proca theories | 23 pages, 3 figures | Phys. Rev. D 94, 044024 (2016) | 10.1103/PhysRevD.94.044024 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the finite interactions of the generalized Proca theory including
the sixth-order Lagrangian and derive the full linear perturbation equations of
motion on the flat Friedmann-Lema\^{i}tre-Robertson-Walker background in the
presence of a matter perfect fluid. By construction, the propagating degrees of
fre... | [
{
"created": "Tue, 17 May 2016 09:07:52 GMT",
"version": "v1"
},
{
"created": "Sat, 13 Aug 2016 06:44:57 GMT",
"version": "v2"
}
] | 2016-08-17 | [
[
"De Felice",
"Antonio",
""
],
[
"Heisenberg",
"Lavinia",
""
],
[
"Kase",
"Ryotaro",
""
],
[
"Mukohyama",
"Shinji",
""
],
[
"Tsujikawa",
"Shinji",
""
],
[
"Zhang",
"Ying-li",
""
]
] | We consider the finite interactions of the generalized Proca theory including the sixth-order Lagrangian and derive the full linear perturbation equations of motion on the flat Friedmann-Lema\^{i}tre-Robertson-Walker background in the presence of a matter perfect fluid. By construction, the propagating degrees of freed... |
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