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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9811043 | M. Trucks | M. Trucks | On Bose-Einstein condensation on closed Robertson-Walker spacetimes | 9 pages, 1 figure, uses elsart.cls | Phys.Lett. B445 (1998) 117-122 | 10.1016/S0370-2693(98)01488-9 | null | gr-qc | null | In this letter we summarize our analysis of Bose-Einstein condensation on
closed Robertson-Walker spacetimes. In a previous work we defined an adiabatic
KMS state on the Weyl-algebra of the free massive Klein-Gordon field. This
state describes a free Bose gas on Robertson-Walker spacetimes. We use this
state to analy... | [
{
"created": "Thu, 12 Nov 1998 23:56:26 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Trucks",
"M.",
""
]
] | In this letter we summarize our analysis of Bose-Einstein condensation on closed Robertson-Walker spacetimes. In a previous work we defined an adiabatic KMS state on the Weyl-algebra of the free massive Klein-Gordon field. This state describes a free Bose gas on Robertson-Walker spacetimes. We use this state to analyze... |
2109.04486 | Aindri\'u Conroy | Aindri\'u Conroy and Peter Taylor | Response of an Unruh-DeWitt detector near an extremal black hole | 21 pages, 26 figures | null | 10.1103/PhysRevD.105.085001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the response of an Unruh-DeWitt detector near an extremal charged
black hole, modeling the near-horizon region of this extremal spacetime by the
Bertotti-Robinson spacetime. The advantage of employing the Bertotti-Robinson
limit is that the two-point functions for a massless scalar field are
obtainable in... | [
{
"created": "Thu, 9 Sep 2021 18:00:07 GMT",
"version": "v1"
}
] | 2022-04-13 | [
[
"Conroy",
"Aindriú",
""
],
[
"Taylor",
"Peter",
""
]
] | We consider the response of an Unruh-DeWitt detector near an extremal charged black hole, modeling the near-horizon region of this extremal spacetime by the Bertotti-Robinson spacetime. The advantage of employing the Bertotti-Robinson limit is that the two-point functions for a massless scalar field are obtainable in c... |
gr-qc/0312077 | Simone Mercuri | Simone Mercuri and Giovanni Montani | Dualism between Physical Frames and Time in Quantum Gravity | 9 pages, submitted to Mod. Phys. Lett. A, major replacements in
section 3 and 4 | Mod.Phys.Lett. A19 (2004) 1519 | 10.1142/S0217732304014756 | null | gr-qc | null | In this work we present a discussion of the existing links between the
procedures of endowing the quantum gravity with a real time and of including in
the theory a physical reference frame. More precisely, as first step, we
develop the canonical quantum dynamics, starting from the Einstein equations in
presence of a ... | [
{
"created": "Wed, 17 Dec 2003 10:44:01 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Feb 2004 15:59:55 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Mercuri",
"Simone",
""
],
[
"Montani",
"Giovanni",
""
]
] | In this work we present a discussion of the existing links between the procedures of endowing the quantum gravity with a real time and of including in the theory a physical reference frame. More precisely, as first step, we develop the canonical quantum dynamics, starting from the Einstein equations in presence of a du... |
1806.04027 | Shaoqi Hou | Yungui Gong, Shaoqi Hou | The Polarizations of Gravitational Waves | 20 pages, 4 figures, a talk given in International Conference on
Quantum Gravity held in SUSTech, Shenzhen, China | Universe 2018, 4, 85 | 10.3390/universe4080085 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The direct detection of gravitational waves by LIGO/Virgo opened the
possibility to test General Relativity and its alternatives in the high speed,
strong field regime. Alternative theories of gravity generally predict more
polarizations than General Relativity, so it is important to study the
polarization contents o... | [
{
"created": "Mon, 11 Jun 2018 14:50:04 GMT",
"version": "v1"
}
] | 2018-08-10 | [
[
"Gong",
"Yungui",
""
],
[
"Hou",
"Shaoqi",
""
]
] | The direct detection of gravitational waves by LIGO/Virgo opened the possibility to test General Relativity and its alternatives in the high speed, strong field regime. Alternative theories of gravity generally predict more polarizations than General Relativity, so it is important to study the polarization contents of ... |
1901.06785 | Chiara Mingarelli | Chiara M. F. Mingarelli | Probing supermassive black hole mergers and stalling with pulsar timing
arrays | 2 pages, 2 figures, invited comment | Nature Astronomy, volume 3, pages 8-10 (2019) | 10.1038/s41550-018-0666-y | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The observation of gravitational-waves from merging supermassive black holes
will be transformative: the detection of a low-frequency gravitational-wave
background can tell us if and how supermassive black holes merge, inform our
knowledge of galaxy merger rates and supermassive black hole masses, and enable
the poss... | [
{
"created": "Mon, 21 Jan 2019 03:55:30 GMT",
"version": "v1"
}
] | 2019-01-23 | [
[
"Mingarelli",
"Chiara M. F.",
""
]
] | The observation of gravitational-waves from merging supermassive black holes will be transformative: the detection of a low-frequency gravitational-wave background can tell us if and how supermassive black holes merge, inform our knowledge of galaxy merger rates and supermassive black hole masses, and enable the possib... |
1111.1856 | Thiago R.P.Caram\^es | T. R. P. Caram\^es, E. R. Bezerra de Mello, M. E. X. Guimar\~aes | On the motion of a test particle around a global monopole in a modified
gravity | 7 pages, 3 figure. New version accepted for publication in Modern
Physics Letters A | Mod. Phys. Lett. A, Vol. 27, No. 30 (2012) 1250177 | 10.1142/S0217732312501775 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we suggest an approach to analyse the motion of a test particle
in the spacetime of a global monopole within a $f(R)$-like modified gravity.
The field equations are written in a more simplified form in terms of
$F(R)=\frac{df(R)}{dR}$. Since we are dealing with a spherically symmetric
problem, $F(R)$ is... | [
{
"created": "Tue, 8 Nov 2011 10:23:55 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Mar 2012 14:34:11 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Sep 2012 14:53:42 GMT",
"version": "v3"
}
] | 2012-09-19 | [
[
"Caramês",
"T. R. P.",
""
],
[
"de Mello",
"E. R. Bezerra",
""
],
[
"Guimarães",
"M. E. X.",
""
]
] | In this paper we suggest an approach to analyse the motion of a test particle in the spacetime of a global monopole within a $f(R)$-like modified gravity. The field equations are written in a more simplified form in terms of $F(R)=\frac{df(R)}{dR}$. Since we are dealing with a spherically symmetric problem, $F(R)$ is e... |
gr-qc/0111003 | Manuel Tiglio | Gioel Calabrese, Luis Lehner, and Manuel Tiglio | Constraint-preserving boundary conditions in numerical relativity | null | Phys.Rev.D65:104031,2002 | 10.1103/PhysRevD.65.104031 | null | gr-qc | null | This is the first paper in a series aimed to implement boundary conditions
consistent with the constraints' propagation in 3D numerical relativity. Here
we consider spherically symmetric black hole spacetimes in vacuum or with a
minimally coupled scalar field, within the Einstein-Christoffel symmetric
hyperbolic form... | [
{
"created": "Fri, 2 Nov 2001 18:53:39 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Calabrese",
"Gioel",
""
],
[
"Lehner",
"Luis",
""
],
[
"Tiglio",
"Manuel",
""
]
] | This is the first paper in a series aimed to implement boundary conditions consistent with the constraints' propagation in 3D numerical relativity. Here we consider spherically symmetric black hole spacetimes in vacuum or with a minimally coupled scalar field, within the Einstein-Christoffel symmetric hyperbolic formul... |
1701.00883 | Jie-Xiong Mo | Jie-Xiong Mo, Feng Liang and Gu-Qiang Li | Heat engine in the three-dimensional spacetime | Revised version. Discussions added | JHEP 03(2017)010 | 10.1007/JHEP03(2017)010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We define a kind of heat engine via three-dimensional charged BTZ black
holes. This case is quite subtle and needs to be more careful. The heat flow
along the isochores does not equal to zero since the specific heat $C_V\neq0$
and this point completely differs from the cases discussed before whose
isochores and adiab... | [
{
"created": "Wed, 4 Jan 2017 01:55:51 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Mar 2017 05:39:07 GMT",
"version": "v2"
}
] | 2017-03-07 | [
[
"Mo",
"Jie-Xiong",
""
],
[
"Liang",
"Feng",
""
],
[
"Li",
"Gu-Qiang",
""
]
] | We define a kind of heat engine via three-dimensional charged BTZ black holes. This case is quite subtle and needs to be more careful. The heat flow along the isochores does not equal to zero since the specific heat $C_V\neq0$ and this point completely differs from the cases discussed before whose isochores and adiabat... |
1502.06125 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | $\Lambda$CDM Bounce Cosmology without $\Lambda$CDM: the case of modified
gravity | 31 pages, accepted by PRD | null | 10.1103/PhysRevD.91.064036 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide an $F(R)$ gravity description of a $\Lambda$CDM bouncing model,
without the need for matter fluids or for cosmological constant. As we
explicitly demonstrate, the two cosmological eras that constitute the
$\Lambda$CDM bouncing model, can be generated by $F(R)$ gravity which can lead
to accelerating cosmolo... | [
{
"created": "Sat, 21 Feb 2015 18:30:14 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | We provide an $F(R)$ gravity description of a $\Lambda$CDM bouncing model, without the need for matter fluids or for cosmological constant. As we explicitly demonstrate, the two cosmological eras that constitute the $\Lambda$CDM bouncing model, can be generated by $F(R)$ gravity which can lead to accelerating cosmologi... |
1708.04566 | Kimet Jusufi | Ayan Banerjee, J. R. Villanueva, Phongpichit Channuie, Kimet Jusufi | Stable Gravastars: Guilfoyle's electrically charged solutions | 12 pages, 6 figures, accepted for publication in Chinese Physics C | Chinese Physics C Vol. 42, No. 11 (2018) 115101 | 10.1088/1674-1137/42/11/115101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Compelling alternatives to black holes, namely, gravitational vacuum star
({\it gravastar}) models, the multilayered structure compact objects, have been
proposed to avoid a number of theoretical problems associated with event
horizons and singularities. In this work, we construct a spherically symmetric
thin-shell c... | [
{
"created": "Tue, 15 Aug 2017 15:51:57 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Aug 2018 10:35:56 GMT",
"version": "v2"
}
] | 2018-09-13 | [
[
"Banerjee",
"Ayan",
""
],
[
"Villanueva",
"J. R.",
""
],
[
"Channuie",
"Phongpichit",
""
],
[
"Jusufi",
"Kimet",
""
]
] | Compelling alternatives to black holes, namely, gravitational vacuum star ({\it gravastar}) models, the multilayered structure compact objects, have been proposed to avoid a number of theoretical problems associated with event horizons and singularities. In this work, we construct a spherically symmetric thin-shell cha... |
1002.4826 | Mark Durkee | Mark Durkee, Vojtech Pravda, Alena Pravdova, Harvey S. Reall | Generalization of the Geroch-Held-Penrose formalism to higher dimensions | 24 pages | Class.Quant.Grav.27:215010,2010 | 10.1088/0264-9381/27/21/215010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Geroch, Held and Penrose invented a formalism for studying spacetimes
admitting one or two preferred null directions. This approach is very useful
for studying algebraically special spacetimes and their perturbations. In the
present paper, the formalism is generalized to higher-dimensional spacetimes.
This new formal... | [
{
"created": "Thu, 25 Feb 2010 16:44:43 GMT",
"version": "v1"
}
] | 2010-10-01 | [
[
"Durkee",
"Mark",
""
],
[
"Pravda",
"Vojtech",
""
],
[
"Pravdova",
"Alena",
""
],
[
"Reall",
"Harvey S.",
""
]
] | Geroch, Held and Penrose invented a formalism for studying spacetimes admitting one or two preferred null directions. This approach is very useful for studying algebraically special spacetimes and their perturbations. In the present paper, the formalism is generalized to higher-dimensional spacetimes. This new formalis... |
0708.1261 | Nelson Nunes | E. J. Copeland, D. J. Mulryne, N. J. Nunes, M. Shaeri | Super-inflation in Loop Quantum Cosmology | 11 pages, 2 figures. Extended discussion section | Phys.Rev.D77:023510,2008 | 10.1103/PhysRevD.77.023510 | null | gr-qc | null | We investigate the dynamics of super-inflation in two versions of Loop
Quantum Cosmology, one in which the Friedmann equation is modified by the
presence of inverse volume corrections, and one in which quadratic corrections
are important. Computing the tilt of the power spectrum of the perturbed scalar
field in terms... | [
{
"created": "Thu, 9 Aug 2007 13:01:52 GMT",
"version": "v1"
},
{
"created": "Sat, 6 Oct 2007 20:36:06 GMT",
"version": "v2"
},
{
"created": "Tue, 8 Jan 2008 18:20:22 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Copeland",
"E. J.",
""
],
[
"Mulryne",
"D. J.",
""
],
[
"Nunes",
"N. J.",
""
],
[
"Shaeri",
"M.",
""
]
] | We investigate the dynamics of super-inflation in two versions of Loop Quantum Cosmology, one in which the Friedmann equation is modified by the presence of inverse volume corrections, and one in which quadratic corrections are important. Computing the tilt of the power spectrum of the perturbed scalar field in terms o... |
1612.00266 | Jahed Abedi | Jahed Abedi, Hannah Dykaar, Niayesh Afshordi | Echoes from the Abyss: Tentative evidence for Planck-scale structure at
black hole horizons | 13 pages, 13 figures, 2 tables, Extended discussions, PRD in press | Phys. Rev. D 96, 082004 (2017) | 10.1103/PhysRevD.96.082004 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In classical General Relativity (GR), an observer falling into an
astrophysical black hole is not expected to experience anything dramatic as she
crosses the event horizon. However, tentative resolutions to problems in
quantum gravity, such as the cosmological constant problem, or the black hole
information paradox, ... | [
{
"created": "Thu, 1 Dec 2016 14:31:12 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Oct 2017 14:31:30 GMT",
"version": "v2"
}
] | 2017-11-01 | [
[
"Abedi",
"Jahed",
""
],
[
"Dykaar",
"Hannah",
""
],
[
"Afshordi",
"Niayesh",
""
]
] | In classical General Relativity (GR), an observer falling into an astrophysical black hole is not expected to experience anything dramatic as she crosses the event horizon. However, tentative resolutions to problems in quantum gravity, such as the cosmological constant problem, or the black hole information paradox, in... |
1710.06299 | Behnam Pourhassan | B. Pourhassan, K. Kokabi, S. Rangyan | Thermodynamics of higher dimensional black holes with higher order
thermal fluctuations | 27 pages, 19 figures | Gen Relativ Gravit 49 (2017) 144 | 10.1007/s10714-017-2315-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider higher order corrections of the entropy, which
coming from thermal fluctuations, and find their effect on the thermodynamics
of higher dimensional charged black holes. Leading order thermal fluctuation is
logarithmic term in the entropy while higher order correction is proportional
to the i... | [
{
"created": "Sun, 15 Oct 2017 07:49:29 GMT",
"version": "v1"
}
] | 2017-11-29 | [
[
"Pourhassan",
"B.",
""
],
[
"Kokabi",
"K.",
""
],
[
"Rangyan",
"S.",
""
]
] | In this paper, we consider higher order corrections of the entropy, which coming from thermal fluctuations, and find their effect on the thermodynamics of higher dimensional charged black holes. Leading order thermal fluctuation is logarithmic term in the entropy while higher order correction is proportional to the inv... |
1704.00296 | Chopin Soo | Eyo Eyo Ita III, Chopin Soo and Hoi-Lai Yu | Gravitational waves in Intrinsic Time Geometrodynamics | 7 pages; replaced by published version | Eur. Phys. J. C (2018) 78: 723 | 10.1140/epjc/s10052-018-6203-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves are investigated in Intrinsic Time Geometrodynamics. This
theory has a non-vanishing physical Hamiltonian generating intrinsic time
development in our expanding universe, and four-covariance is explicitly broken
by higher spatial curvature terms. Linearization of Hamilton's equations about
the de ... | [
{
"created": "Sun, 2 Apr 2017 13:56:13 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Sep 2018 00:23:04 GMT",
"version": "v2"
}
] | 2018-09-11 | [
[
"Ita",
"Eyo Eyo",
"III"
],
[
"Soo",
"Chopin",
""
],
[
"Yu",
"Hoi-Lai",
""
]
] | Gravitational waves are investigated in Intrinsic Time Geometrodynamics. This theory has a non-vanishing physical Hamiltonian generating intrinsic time development in our expanding universe, and four-covariance is explicitly broken by higher spatial curvature terms. Linearization of Hamilton's equations about the de Si... |
1909.02698 | Francisco Hernandez Vivanco | Francisco Hernandez Vivanco, Rory Smith, Eric Thrane, Paul D. Lasky,
Colm Talbot, Vivien Raymond | Measuring the neutron star equation of state with gravitational waves:
the first forty binary neutron star mergers | Accepted for publication in Phys. Rev. D. We added Appendix A
following publication of the paper in the journal | Phys. Rev. D 100, 103009 (2019) | 10.1103/PhysRevD.100.103009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves from binary neutron star coalescences contain rich
information about matter at supranuclear densities encoded by the neutron star
equation of state. We can measure the equation of state by analyzing the tidal
interactions between neutron stars, which is quantified by the tidal
deformability. Multi... | [
{
"created": "Fri, 6 Sep 2019 02:44:32 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Oct 2019 04:05:21 GMT",
"version": "v2"
},
{
"created": "Tue, 26 May 2020 03:55:07 GMT",
"version": "v3"
}
] | 2020-05-27 | [
[
"Vivanco",
"Francisco Hernandez",
""
],
[
"Smith",
"Rory",
""
],
[
"Thrane",
"Eric",
""
],
[
"Lasky",
"Paul D.",
""
],
[
"Talbot",
"Colm",
""
],
[
"Raymond",
"Vivien",
""
]
] | Gravitational waves from binary neutron star coalescences contain rich information about matter at supranuclear densities encoded by the neutron star equation of state. We can measure the equation of state by analyzing the tidal interactions between neutron stars, which is quantified by the tidal deformability. Multipl... |
2004.03214 | Jacek Jezierski | Jacek Jezierski, Jerzy Kijowski and Marian Wiatr | Localizing Energy in Fierz-Lanczos theory | 25 pages | Phys. Rev. D 102, 024015 (2020) | 10.1103/PhysRevD.102.024015 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate energy carried by the massless spin-2 field using Fierz-Lanczos
representation of the theory. For this purpose Hamiltonian formulation of the
field dynamic is thoroughly analyzed. Final expression for the energy is very
much analogous to the Maxwell energy in electrodynamics (spin-1 field) and
displays t... | [
{
"created": "Tue, 7 Apr 2020 09:09:00 GMT",
"version": "v1"
}
] | 2020-07-15 | [
[
"Jezierski",
"Jacek",
""
],
[
"Kijowski",
"Jerzy",
""
],
[
"Wiatr",
"Marian",
""
]
] | We calculate energy carried by the massless spin-2 field using Fierz-Lanczos representation of the theory. For this purpose Hamiltonian formulation of the field dynamic is thoroughly analyzed. Final expression for the energy is very much analogous to the Maxwell energy in electrodynamics (spin-1 field) and displays the... |
gr-qc/9510037 | Vadim V. Zhytnikov | A. O. Barvinsky, A. G. Mirzabekian and V. V. Zhytnikov | Conformal Decomposition of the Effective Action and Covariant Curvature
Expansion | 19 pages, LaTeX, Talk given at 6th Quantum Gravity Seminar Moscow,
June 12-19, 1995 | null | null | null | gr-qc hep-th | null | The class of effective actions exactly reproducing the conformal anomaly in
4D is considered. It is demonstrated that the freedom within this class can be
fixed by the choice of the conformal gauge. The conformal invariant part of the
generic one-loop effective action expanded in the covariant series up to third
orde... | [
{
"created": "Wed, 18 Oct 1995 07:54:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Barvinsky",
"A. O.",
""
],
[
"Mirzabekian",
"A. G.",
""
],
[
"Zhytnikov",
"V. V.",
""
]
] | The class of effective actions exactly reproducing the conformal anomaly in 4D is considered. It is demonstrated that the freedom within this class can be fixed by the choice of the conformal gauge. The conformal invariant part of the generic one-loop effective action expanded in the covariant series up to third order ... |
1808.00340 | Joel Berg\'e | Joel Berg\'e, Philippe Brax, Martin Pernot-Borr\`as, Jean-Philippe
Uzan | Interpretation of geodesy experiments in non-Newtonian theories of
gravity | submitted to CQG | null | 10.1088/1361-6382/aae9a1 | null | gr-qc astro-ph.CO physics.geo-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The tests of the deviations from Newton's or Einstein's gravity in the Earth
neighbourhood are tied to our knowledge of the shape and mass distribution of
our planet. On the one hand estimators of these "modified" theories of gravity
may be explicitly Earth-model-dependent whilst on the other hand the Earth
gravitati... | [
{
"created": "Wed, 1 Aug 2018 14:33:06 GMT",
"version": "v1"
}
] | 2018-12-05 | [
[
"Bergé",
"Joel",
""
],
[
"Brax",
"Philippe",
""
],
[
"Pernot-Borràs",
"Martin",
""
],
[
"Uzan",
"Jean-Philippe",
""
]
] | The tests of the deviations from Newton's or Einstein's gravity in the Earth neighbourhood are tied to our knowledge of the shape and mass distribution of our planet. On the one hand estimators of these "modified" theories of gravity may be explicitly Earth-model-dependent whilst on the other hand the Earth gravitation... |
0901.1757 | Dah-Wei Chiou | Dah-Wei Chiou and Li-Fang Li | How loopy is the quantum bounce? A heuristic analysis of higher order
holonomy corrections in LQC | 5 pages, 1 figure; more remarks and references added; version to
appear in PRD | Phys.Rev.D79:063510,2009 | 10.1103/PhysRevD.79.063510 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A well-motivated extension of higher order holonomy corrections in loop
quantum cosmology (LQC) for the $k=0$ Friedmann-Robertson-Walker model is
investigated at the level of heuristic effective dynamics. It reveals that the
quantum bounce is generic, regardless of the order of corrections, and the
matter density rem... | [
{
"created": "Tue, 13 Jan 2009 10:39:50 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jan 2009 09:07:49 GMT",
"version": "v2"
},
{
"created": "Tue, 3 Mar 2009 07:14:22 GMT",
"version": "v3"
}
] | 2009-03-24 | [
[
"Chiou",
"Dah-Wei",
""
],
[
"Li",
"Li-Fang",
""
]
] | A well-motivated extension of higher order holonomy corrections in loop quantum cosmology (LQC) for the $k=0$ Friedmann-Robertson-Walker model is investigated at the level of heuristic effective dynamics. It reveals that the quantum bounce is generic, regardless of the order of corrections, and the matter density remai... |
2110.07194 | Dmitriy Ovchinnikov | Dmitriy Ovchinnikov, Jan Schee, Zdenek Stuchl\'ik, Bobomurat Ahmedov | Light curves of the hot spots on circular orbits around generic regular
black holes related to non-linear electrodynamics with Maxwellian weak-field
Limit | 35 pages, 7 figures, was updated information in acknowledgment, was
added .nb file, the .nb file was moved to auxiliary files | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The combined effect of a strong gravitational field and electromagnetic field
in the vicinity of a generic regular black hole related to non-linear
electrodynamics with Maxwellian weak-field limit on the radiation flux of a hot
spot orbiting the regular black hole on the Keplerian disc has been studied.
The frequency... | [
{
"created": "Thu, 14 Oct 2021 07:40:17 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Dec 2021 10:37:55 GMT",
"version": "v2"
},
{
"created": "Thu, 9 Dec 2021 08:46:36 GMT",
"version": "v3"
}
] | 2021-12-10 | [
[
"Ovchinnikov",
"Dmitriy",
""
],
[
"Schee",
"Jan",
""
],
[
"Stuchlík",
"Zdenek",
""
],
[
"Ahmedov",
"Bobomurat",
""
]
] | The combined effect of a strong gravitational field and electromagnetic field in the vicinity of a generic regular black hole related to non-linear electrodynamics with Maxwellian weak-field limit on the radiation flux of a hot spot orbiting the regular black hole on the Keplerian disc has been studied. The frequency s... |
gr-qc/9807073 | Luca Lusanna. Sez. Di Firenze. | Luca Lusanna (INFN, Firenze) and Stefano Russo (Lugano) | Tetrad Gravity: I) A New Formulation | 68 pages, revtex, revised version with additions | null | null | null | gr-qc | null | A new version of tetrad gravity in globally hyperbolic, asymptotically flat
at spatial infinity spacetimes with Cauchy surfaces diffeomorphic to $R^3$ is
obtained by using a new parametrization of arbitrary cotetrads to define a set
of configurational variables to be used in the ADM metric action. Seven of the
fourte... | [
{
"created": "Tue, 28 Jul 1998 15:02:42 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jan 1999 16:47:55 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Jul 1999 10:46:38 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Lusanna",
"Luca",
"",
"INFN, Firenze"
],
[
"Russo",
"Stefano",
"",
"Lugano"
]
] | A new version of tetrad gravity in globally hyperbolic, asymptotically flat at spatial infinity spacetimes with Cauchy surfaces diffeomorphic to $R^3$ is obtained by using a new parametrization of arbitrary cotetrads to define a set of configurational variables to be used in the ADM metric action. Seven of the fourteen... |
gr-qc/0605128 | Alan Coley | A.A. Coley, S. Hervik and W.C. Lim | Fluid observers and tilting cosmology | null | Class.Quant.Grav. 23 (2006) 3573-3591 | 10.1088/0264-9381/23/10/021 | null | gr-qc | null | We study perfect fluid cosmological models with a constant equation of state
parameter $\gamma$ in which there are two naturally defined time-like
congruences, a geometrically defined geodesic congruence and a non-geodesic
fluid congruence. We establish an appropriate set of boost formulae relating
the physical varia... | [
{
"created": "Wed, 24 May 2006 16:58:11 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Coley",
"A. A.",
""
],
[
"Hervik",
"S.",
""
],
[
"Lim",
"W. C.",
""
]
] | We study perfect fluid cosmological models with a constant equation of state parameter $\gamma$ in which there are two naturally defined time-like congruences, a geometrically defined geodesic congruence and a non-geodesic fluid congruence. We establish an appropriate set of boost formulae relating the physical variabl... |
gr-qc/0508095 | Ari Peltola | A. Peltola, J. Makela | Radiation of the Inner Horizon of the Reissner-Nordstr\"om Black Hole | 22 pages, 6 figures. References added, discussion slightly expanded
in Secs. I and V. To appear in IJMPD | Int.J.Mod.Phys. D15 (2006) 817-844 | 10.1142/S0218271806008565 | null | gr-qc | null | Despite of over thirty years of research of the black hole thermodynamics our
understanding of the possible role played by the inner horizons of
Reissner-Nordstr\"om and Kerr-Newman black holes in black hole thermodynamics
is still somewhat incomplete: There are derivations which imply that the
temperature of the inn... | [
{
"created": "Tue, 23 Aug 2005 09:36:48 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Feb 2006 11:27:10 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Peltola",
"A.",
""
],
[
"Makela",
"J.",
""
]
] | Despite of over thirty years of research of the black hole thermodynamics our understanding of the possible role played by the inner horizons of Reissner-Nordstr\"om and Kerr-Newman black holes in black hole thermodynamics is still somewhat incomplete: There are derivations which imply that the temperature of the inner... |
0706.0981 | Yun-Song Piao | Yun-Song Piao | Primordial Perturbations During a Slow Expansion | 5 pages, 1 eps figure, minor changes and refs. added, to publish in
PRD | Phys.Rev.D76:083505,2007 | 10.1103/PhysRevD.76.083505 | null | gr-qc | null | Recently, it has been showed that a slow expansion, which is asymptotically a
static state in infinite past and may be described as an evolution with
\epsilon \ll -1, of early universe may lead to the generation of primordial
perturbation responsible for the structure formation of observable universe.
However, its fe... | [
{
"created": "Thu, 7 Jun 2007 10:45:51 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Aug 2007 12:18:17 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Piao",
"Yun-Song",
""
]
] | Recently, it has been showed that a slow expansion, which is asymptotically a static state in infinite past and may be described as an evolution with \epsilon \ll -1, of early universe may lead to the generation of primordial perturbation responsible for the structure formation of observable universe. However, its feas... |
1708.01040 | Donato Bini | Donato Bini, Carmen Chicone, Bahram Mashhoon | Anisotropic Gravitational Collapse and Cosmic Jets | 25 pages, 3 figures, revtex macros; v2: slightly expanded version | Phys. Rev. D 96, 084034 (2017) | 10.1103/PhysRevD.96.084034 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Consider a dynamic general relativistic spacetime in which the proper
infinitesimal interval along one spatial coordinate direction decreases
monotonically with time, while the corresponding intervals increase along other
spatial directions. In a system undergoing such complete anisotropic
collapse/expansion, we look... | [
{
"created": "Thu, 3 Aug 2017 08:09:53 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Sep 2017 17:55:43 GMT",
"version": "v2"
}
] | 2022-08-17 | [
[
"Bini",
"Donato",
""
],
[
"Chicone",
"Carmen",
""
],
[
"Mashhoon",
"Bahram",
""
]
] | Consider a dynamic general relativistic spacetime in which the proper infinitesimal interval along one spatial coordinate direction decreases monotonically with time, while the corresponding intervals increase along other spatial directions. In a system undergoing such complete anisotropic collapse/expansion, we look f... |
1601.04420 | Chee Leong Ching | Chee Leong Ching, Cheng Xun Yeo and Wei Khim Ng | Non-Relativistic Anti-Snyder Model and Some Applications | null | International Journal of Modern Physics A, Vol. 32 (2017) 1750009
(28 pages) | 10.1142/S0217751X17500099 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the (2+1)-dimensional Dirac equation in a homogeneous magnetic
field under the non-relativistic anti-Snyder model which is relevant to
deformed special relativity (DSR) since it exhibits an intrinsic upper bound of
the momentum of free particles. After setting up the formalism, exact eigen
solutions are de... | [
{
"created": "Mon, 18 Jan 2016 07:48:41 GMT",
"version": "v1"
}
] | 2017-01-09 | [
[
"Ching",
"Chee Leong",
""
],
[
"Yeo",
"Cheng Xun",
""
],
[
"Ng",
"Wei Khim",
""
]
] | We examine the (2+1)-dimensional Dirac equation in a homogeneous magnetic field under the non-relativistic anti-Snyder model which is relevant to deformed special relativity (DSR) since it exhibits an intrinsic upper bound of the momentum of free particles. After setting up the formalism, exact eigen solutions are deri... |
1811.07513 | Avinash Singh | Avinash Singh, Archana Sangwan, H. K. Jassal | Low redshift observational constraints on tachyon models of dark energy | 20 pages, 9 figures, References added, Minor modifications, Published
in JCAP | JCAP04 (2019) 047 | 10.1088/1475-7516/2019/04/047 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The background evolution of an accelerated, dark energy dominated universe is
aptly described by non-canonical tachyon scalar field models. The accelerated
expansion of the universe is determined by the choice of a suitable scalar
field potential; in the case of a tachyon field, a 'runaway' potential. In the
absence ... | [
{
"created": "Mon, 19 Nov 2018 06:00:36 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Dec 2018 08:31:53 GMT",
"version": "v2"
},
{
"created": "Thu, 9 May 2019 09:21:32 GMT",
"version": "v3"
}
] | 2019-05-10 | [
[
"Singh",
"Avinash",
""
],
[
"Sangwan",
"Archana",
""
],
[
"Jassal",
"H. K.",
""
]
] | The background evolution of an accelerated, dark energy dominated universe is aptly described by non-canonical tachyon scalar field models. The accelerated expansion of the universe is determined by the choice of a suitable scalar field potential; in the case of a tachyon field, a 'runaway' potential. In the absence of... |
gr-qc/0609095 | Jason Steffen | P. E. Boynton, R. M. Bonicalzi, A. M. Kalet, A. M. Kleczewski, J. K.
Lingwood, K. J. McKenney, M. W. Moore, J. H. Steffen (University of
Washington, Seattle) E. C. Berg, W. D. Cross, R. D. Newman (University of
California, Irvine) R. E. Gephart (Pacific Northwest National Laboratory) | Gravitation Physics at BGPL | To be published in The Proceedings of the Francesco Melchiorri
Memorial Conference as a special issue of New Astronomy Reviews | New Astron.Rev.51:334-340,2007 | 10.1016/j.newar.2006.11.035 | null | gr-qc | null | We report progress on a program of gravitational physics experiments using
cryogenic torsion pendula undergoing large-amplitude torsion oscillation. This
program includes tests of the gravitational inverse square law and of the weak
equivalence principle. Here we describe our ongoing search for
inverse-square-law vio... | [
{
"created": "Thu, 21 Sep 2006 22:30:14 GMT",
"version": "v1"
}
] | 2011-04-11 | [
[
"Boynton",
"P. E.",
"",
"University of\n Washington, Seattle"
],
[
"Bonicalzi",
"R. M.",
"",
"University of\n Washington, Seattle"
],
[
"Kalet",
"A. M.",
"",
"University of\n Washington, Seattle"
],
[
"Kleczewski",
"A. M.",
"",
"Univer... | We report progress on a program of gravitational physics experiments using cryogenic torsion pendula undergoing large-amplitude torsion oscillation. This program includes tests of the gravitational inverse square law and of the weak equivalence principle. Here we describe our ongoing search for inverse-square-law viola... |
gr-qc/0407012 | Andrea Nerozzi Mr | Christopher Beetle, Marco Bruni, Lior M. Burko and Andrea Nerozzi | Towards a novel wave-extraction method for numerical relativity. I.
Foundations and initial-value formulation | 11 pages, 1 figure | Phys.Rev. D72 (2005) 024013 | 10.1103/PhysRevD.72.024013 | null | gr-qc | null | The Teukolsky formalism of black hole perturbation theory describes weak
gravitational radiation generated by a mildly dynamical hole near equilibrium.
A particular null tetrad of the background Kerr geometry, due to Kinnersley,
plays a singularly important role within this formalism. In order to apply the
rich physi... | [
{
"created": "Fri, 2 Jul 2004 19:39:39 GMT",
"version": "v1"
},
{
"created": "Wed, 11 May 2005 03:42:57 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Beetle",
"Christopher",
""
],
[
"Bruni",
"Marco",
""
],
[
"Burko",
"Lior M.",
""
],
[
"Nerozzi",
"Andrea",
""
]
] | The Teukolsky formalism of black hole perturbation theory describes weak gravitational radiation generated by a mildly dynamical hole near equilibrium. A particular null tetrad of the background Kerr geometry, due to Kinnersley, plays a singularly important role within this formalism. In order to apply the rich physica... |
1710.07109 | Oldrich Semerak | P. \v{C}\'i\v{z}ek, O. Semer\'ak | Perturbation of a Schwarzschild black hole due to a rotating thin disc | 24 pages, 4 figures, 2 tables | Phys. Rev. D 97, 084006 (2018) | 10.3847/1538-4365/aa876b | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Will (1974) treated the perturbation of a Schwarzschild black hole due to a
slowly rotating light concentric thin ring by solving the perturbation
equations in terms of a multipole expansion of the mass-and-rotation
perturbation series. In the Schwarzschild background, his approach can be
generalized to the perturbat... | [
{
"created": "Thu, 19 Oct 2017 12:07:29 GMT",
"version": "v1"
}
] | 2018-04-18 | [
[
"Čížek",
"P.",
""
],
[
"Semerák",
"O.",
""
]
] | Will (1974) treated the perturbation of a Schwarzschild black hole due to a slowly rotating light concentric thin ring by solving the perturbation equations in terms of a multipole expansion of the mass-and-rotation perturbation series. In the Schwarzschild background, his approach can be generalized to the perturbatio... |
gr-qc/0412069 | Fernando C. Lombardo | Fernando C. Lombardo | Influence functional approach to decoherence during Inflation | 6 pages, no figures. Contributed talk to the Second International
Workshop DICE2004, Piombino, Italy | Braz.J.Phys. 35 (2005) 391-396 | 10.1590/S0103-97332005000300005 | null | gr-qc | null | We show how the quantum to classical transition of the cosmological
fluctuations produced during inflation can be described by means of the
influence functional and the master equation. We split the inflaton field into
the system-field (long-wavelength modes), and the environment, represented by
its own short-wavelen... | [
{
"created": "Wed, 15 Dec 2004 15:49:47 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Lombardo",
"Fernando C.",
""
]
] | We show how the quantum to classical transition of the cosmological fluctuations produced during inflation can be described by means of the influence functional and the master equation. We split the inflaton field into the system-field (long-wavelength modes), and the environment, represented by its own short-wavelengt... |
2306.15355 | Edgar Gasperin | Edgar Gasperin | Polyhomogeneous spin-0 fields in Minkowski spacetime | 17 pages, submitted to Philosophical Transactions A (At the interface
of asymptotics, conformal methods and analysis in general relativity) | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The asymptotic behaviour of massless spin-0 fields close to spatial and null
infinity in Minkowski spacetime is studied by means of Friedrich's cylinder at
spatial infinity. The results are applied to a system of equations called the
good-bad-ugly which serves as a model for the Einstein field equations in
generalise... | [
{
"created": "Tue, 27 Jun 2023 10:10:31 GMT",
"version": "v1"
}
] | 2023-06-28 | [
[
"Gasperin",
"Edgar",
""
]
] | The asymptotic behaviour of massless spin-0 fields close to spatial and null infinity in Minkowski spacetime is studied by means of Friedrich's cylinder at spatial infinity. The results are applied to a system of equations called the good-bad-ugly which serves as a model for the Einstein field equations in generalised ... |
2209.11184 | Miguel S\'anchez | Miguel S\'anchez | A class of cosmological models with spatially constant sign-changing
curvature | Revised version with some improvements, including an Appendix, two
new references and the simplification of the end of the proof of Th. 4.9. 20
pages, 2 figures. To appear in Portugaliae Matematica | Portugaliae Mathematica. Vol. 80, No. 3/4 (2023) 291-313 | null | null | gr-qc astro-ph.CO math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct globally hyperbolic spacetimes such that each slice $\{t=t_0\}$
of the universal time $t$ is a model space of constant curvature $k(t_0)$ which
may not only vary with $t_0\in\mathbb{R}$ but also change its sign. The metric
is smooth and slightly different to FLRW spacetimes, namely, $g=-dt^2+dr^2+
S_{k(t... | [
{
"created": "Tue, 20 Sep 2022 16:51:19 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Oct 2022 19:49:48 GMT",
"version": "v2"
},
{
"created": "Thu, 9 Feb 2023 13:35:43 GMT",
"version": "v3"
}
] | 2023-10-09 | [
[
"Sánchez",
"Miguel",
""
]
] | We construct globally hyperbolic spacetimes such that each slice $\{t=t_0\}$ of the universal time $t$ is a model space of constant curvature $k(t_0)$ which may not only vary with $t_0\in\mathbb{R}$ but also change its sign. The metric is smooth and slightly different to FLRW spacetimes, namely, $g=-dt^2+dr^2+ S_{k(t)}... |
1212.0837 | William East | William E. East, Sean T. McWilliams, Janna Levin, Frans Pretorius | Observing complete gravitational wave signals from dynamical capture
binaries | 18 pages, 18 figures; revised to match accepted version, PRD in press | Phys. Rev. D 87, 043004 (2013) | 10.1103/PhysRevD.87.043004 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We assess the detectability of the gravitational wave signals from highly
eccentric compact binaries. We use a simple model for the inspiral, merger, and
ringdown of these systems. The model is based on mapping the binary to an
effective single black hole system described by a Kerr metric, thereby
including certain r... | [
{
"created": "Tue, 4 Dec 2012 19:43:56 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Feb 2013 21:00:01 GMT",
"version": "v2"
}
] | 2013-02-14 | [
[
"East",
"William E.",
""
],
[
"McWilliams",
"Sean T.",
""
],
[
"Levin",
"Janna",
""
],
[
"Pretorius",
"Frans",
""
]
] | We assess the detectability of the gravitational wave signals from highly eccentric compact binaries. We use a simple model for the inspiral, merger, and ringdown of these systems. The model is based on mapping the binary to an effective single black hole system described by a Kerr metric, thereby including certain rel... |
1904.04471 | Ben David Normann Mr. | Ben David Normann and Chris Clarkson | Recursion relations for gravitational lensing | 18 pages, 1 figure | General Relativity and Gravitation 52 (2020), 3 | 10.1007/s10714-020-02677-z | null | gr-qc astro-ph.CO astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The weak gravitational lensing formalism can be extended to the strong
lensing regime by integrating a nonlinear version of the geodesic deviation
equation. The resulting "roulette" expansion generalises the notion of
convergence, shear and flexion to arbitrary order. The independent coefficients
of this expansion ar... | [
{
"created": "Tue, 9 Apr 2019 05:35:36 GMT",
"version": "v1"
},
{
"created": "Sun, 27 Oct 2019 06:31:38 GMT",
"version": "v2"
},
{
"created": "Tue, 31 Mar 2020 08:42:04 GMT",
"version": "v3"
}
] | 2020-04-01 | [
[
"Normann",
"Ben David",
""
],
[
"Clarkson",
"Chris",
""
]
] | The weak gravitational lensing formalism can be extended to the strong lensing regime by integrating a nonlinear version of the geodesic deviation equation. The resulting "roulette" expansion generalises the notion of convergence, shear and flexion to arbitrary order. The independent coefficients of this expansion are ... |
gr-qc/0407010 | Laszlo A. Gergely | L\'aszl\'o \'A. Gergely | No Swiss-cheese universe on the brane | v2: slightly expanded; references added; version to appear Phys. Rev.
D, v3: corrected cf. erratum published in Phys. Rev. D | Phys.Rev.D71:084017,2005; Erratum-ibid.D72:069902,2005 | 10.1103/PhysRevD.71.084017 10.1103/PhysRevD.72.069902 | null | gr-qc | null | We study the possibility of brane-world generalization of the Einstein-Straus
Swiss-cheese cosmological model. We find the modifications induced by the
brane-world scenario. At a first glance only the motion of the boundary is
modified and the fluid in the exterior region is allowed to have pressure. The
general rela... | [
{
"created": "Fri, 2 Jul 2004 13:00:40 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Mar 2005 16:32:29 GMT",
"version": "v2"
},
{
"created": "Thu, 22 Feb 2007 15:08:20 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Gergely",
"László Á.",
""
]
] | We study the possibility of brane-world generalization of the Einstein-Straus Swiss-cheese cosmological model. We find the modifications induced by the brane-world scenario. At a first glance only the motion of the boundary is modified and the fluid in the exterior region is allowed to have pressure. The general relati... |
gr-qc/0702103 | Hamid Reza Sepangi | F. Ahmadi, S. Jalalzadeh and H. R. Sepangi | Lorentz violation and the speed of gravitational waves in brane-worlds | 8 pages, to appear in PLB | Phys.Lett.B647:486-492,2007 | 10.1016/j.physletb.2007.02.032 | null | gr-qc hep-th | null | Lorentz violation in a brane-world scenario is presented and used to obtain a
relationship between the speed of gravitational waves in the bulk and that on
the brane. Lorentz violating effects would manifest themselves in gravitational
waves travelling with a greater speed in the bulk than on the brane and this
effec... | [
{
"created": "Mon, 19 Feb 2007 11:26:14 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ahmadi",
"F.",
""
],
[
"Jalalzadeh",
"S.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | Lorentz violation in a brane-world scenario is presented and used to obtain a relationship between the speed of gravitational waves in the bulk and that on the brane. Lorentz violating effects would manifest themselves in gravitational waves travelling with a greater speed in the bulk than on the brane and this effect ... |
gr-qc/9906088 | Pedro Marronetti | P. Marronetti, G.J. Mathews, J.R. Wilson | Irrotational binary neutron stars in quasiequilibrium | 4 pages, 2 figures, revtex, accepted for publication in Phys. Rev. D | Phys.Rev. D60 (1999) 087301 | 10.1103/PhysRevD.60.087301 | null | gr-qc | null | We report on numerical results from an independent formalism to describe the
quasi-equilibrium structure of nonsynchronous binary neutron stars in general
relativity. This is an important independent test of controversial numerical
hydrodynamic simulations which suggested that nonsynchronous neutron stars in a
close ... | [
{
"created": "Mon, 21 Jun 1999 23:01:50 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Marronetti",
"P.",
""
],
[
"Mathews",
"G. J.",
""
],
[
"Wilson",
"J. R.",
""
]
] | We report on numerical results from an independent formalism to describe the quasi-equilibrium structure of nonsynchronous binary neutron stars in general relativity. This is an important independent test of controversial numerical hydrodynamic simulations which suggested that nonsynchronous neutron stars in a close bi... |
1501.04702 | Yongwan Gim | Yongwan Gim and Wontae Kim | Black Hole Complementarity in Gravity's Rainbow | 13 pages, 2 figures added and many improvements, version to appear in
JCAP | JCAP, 05 (2015) 002 | 10.1088/1475-7516/2015/05/002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | To see how the gravity's rainbow works for black hole complementary, we
evaluate the required energy for duplication of information in the context of
black hole complementarity by calculating the critical value of the rainbow
parameter in the certain class of the rainbow Schwarzschild black hole. The
resultant energy... | [
{
"created": "Tue, 20 Jan 2015 03:01:39 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Apr 2015 07:39:43 GMT",
"version": "v2"
},
{
"created": "Wed, 6 May 2015 01:29:36 GMT",
"version": "v3"
}
] | 2015-05-07 | [
[
"Gim",
"Yongwan",
""
],
[
"Kim",
"Wontae",
""
]
] | To see how the gravity's rainbow works for black hole complementary, we evaluate the required energy for duplication of information in the context of black hole complementarity by calculating the critical value of the rainbow parameter in the certain class of the rainbow Schwarzschild black hole. The resultant energy c... |
gr-qc/0008014 | Yuri N. Obukhov | Yuri N. Obukhov | On a model of an unconstrained hyperfluid | Revtex, 10 pages, no figures | Phys.Lett. A210 (1996) 163-167 | 10.1016/S0375-9601(96)80004-1 | null | gr-qc | null | A hyperfluid is a classical continuous medium carrying hypermomentum. We
modify the earlier developed variational approach to a hyperfluid in such a way
that the Frenkel type constraints imposed on the hypermomentum current are
eliminated. The resulting self-consistent model is different from the
Weyssenhoff type one... | [
{
"created": "Mon, 7 Aug 2000 14:14:54 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Obukhov",
"Yuri N.",
""
]
] | A hyperfluid is a classical continuous medium carrying hypermomentum. We modify the earlier developed variational approach to a hyperfluid in such a way that the Frenkel type constraints imposed on the hypermomentum current are eliminated. The resulting self-consistent model is different from the Weyssenhoff type one. ... |
2201.05827 | Joan Sola | Cristian Moreno-Pulido and Joan Sola Peracaula | Renormalizing the vacuum energy in cosmological spacetime: implications
for the cosmological constant problem | Typos corrected, references added | Eur. Phys. J. C82, 551 (2022) | 10.1140/epjc/s10052-022-10484-w | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The renormalization of the vacuum energy in quantum field theory (QFT) is
usually plagued with theoretical conundrums related not only with the
renormalization procedure itself, but also with the fact that the final result
leads usually to very large (finite) contributions incompatible with the
measured value of $\La... | [
{
"created": "Sat, 15 Jan 2022 11:00:43 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Jan 2022 18:56:10 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Feb 2022 18:57:21 GMT",
"version": "v3"
},
{
"created": "Sun, 29 May 2022 11:36:29 GMT",
"version": "v4"
},
{
"cr... | 2023-03-21 | [
[
"Moreno-Pulido",
"Cristian",
""
],
[
"Peracaula",
"Joan Sola",
""
]
] | The renormalization of the vacuum energy in quantum field theory (QFT) is usually plagued with theoretical conundrums related not only with the renormalization procedure itself, but also with the fact that the final result leads usually to very large (finite) contributions incompatible with the measured value of $\Lamb... |
2008.01813 | Vyacheslav Dokuchaev | V. A. Berezin, V. I. Dokuchaev, Yu. N. Eroshenko, A. L. Smirnov | Double layer from least action principle | 15 pages, minor proofs, submitted to CQG | 2021 Class. Quantum Grav. 38 045014 | 10.1088/1361-6382/abd143 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derived the equations for the double layers in Quadratic Gravity, using
solely the least action principle. The advantage of our approach is that, in
the process of calculation, the $\delta'$-function does not appear at all, and
the $\delta$-functions appear for a moment and are mutually canceled prior to
integrati... | [
{
"created": "Tue, 4 Aug 2020 20:19:50 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Jan 2021 10:32:05 GMT",
"version": "v2"
}
] | 2021-01-07 | [
[
"Berezin",
"V. A.",
""
],
[
"Dokuchaev",
"V. I.",
""
],
[
"Eroshenko",
"Yu. N.",
""
],
[
"Smirnov",
"A. L.",
""
]
] | We derived the equations for the double layers in Quadratic Gravity, using solely the least action principle. The advantage of our approach is that, in the process of calculation, the $\delta'$-function does not appear at all, and the $\delta$-functions appear for a moment and are mutually canceled prior to integration... |
gr-qc/0703035 | Eric Gourgoulhon | Eric Gourgoulhon (LUTH, CNRS / Observatoire de Paris) | 3+1 Formalism and Bases of Numerical Relativity | Lectures given at the General Relativity Trimester held in the
Institut Henri Poincare (Paris, Sept.-Dec. 2006) and at the VII Mexican
School on Gravitation and Mathematical Physics (Playa del Carmen, Mexico, 26.
Nov. - 2 Dec. 2006), 220 pages, 25 figures. Corrections and suggestions are
welcome | null | null | null | gr-qc astro-ph math.DG | null | These lecture notes provide some introduction to the 3+1 formalism of general
relativity, which is the foundation of most modern numerical relativity. The
text is rather self-contained, with detailed calculations and numerous
examples. Contents: 1. Introduction, 2. Geometry of hypersurfaces, 3. Geometry
of foliations... | [
{
"created": "Tue, 6 Mar 2007 13:19:45 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gourgoulhon",
"Eric",
"",
"LUTH, CNRS / Observatoire de Paris"
]
] | These lecture notes provide some introduction to the 3+1 formalism of general relativity, which is the foundation of most modern numerical relativity. The text is rather self-contained, with detailed calculations and numerous examples. Contents: 1. Introduction, 2. Geometry of hypersurfaces, 3. Geometry of foliations, ... |
gr-qc/9608039 | Youngjai Kiem | Dae Sung Hwang, Youngjai Kiem (Sejong Univ.), Dahl Park (KAIST) | Particle dynamics in a class of 2-dimensional gravity theories | 15 pages, LaTeX. The deletion of the repeated portion of the abstract
and the proper line wrapping of the tex file. No other changes | Phys.Rev.D54:4879-4885,1996 | 10.1103/PhysRevD.54.4879 | KAIST-CHEP-95/18 | gr-qc | null | We provide a method to determine the motion of a classical massive particle
in a background geometry of 2-dimensional gravity theories, for which the
Birkhoff theorem holds. In particular, we get the particle trajectory in a
continuous class of 2-dimensional dilaton gravity theories that includes the
Callan-Giddings-... | [
{
"created": "Fri, 16 Aug 1996 17:28:52 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Aug 1996 03:43:20 GMT",
"version": "v2"
}
] | 2011-09-09 | [
[
"Hwang",
"Dae Sung",
"",
"Sejong Univ."
],
[
"Kiem",
"Youngjai",
"",
"Sejong Univ."
],
[
"Park",
"Dahl",
"",
"KAIST"
]
] | We provide a method to determine the motion of a classical massive particle in a background geometry of 2-dimensional gravity theories, for which the Birkhoff theorem holds. In particular, we get the particle trajectory in a continuous class of 2-dimensional dilaton gravity theories that includes the Callan-Giddings-Ha... |
2404.08185 | Muhammad Zeeshan Mr | Muhammad Zeeshan, Richard O'Shaughnessy | Eccentricity matters: Impact of eccentricity on inferred binary black
hole populations | null | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Gravitational waves (GW), emanating from binary black holes (BBH), encode
vital information about their source. GW signals enable us to deduce key
properties of the BBH population across the universe, including mass, spin, and
eccentricity distribution. While the masses and spins of binary components are
already reco... | [
{
"created": "Fri, 12 Apr 2024 01:28:43 GMT",
"version": "v1"
}
] | 2024-04-15 | [
[
"Zeeshan",
"Muhammad",
""
],
[
"O'Shaughnessy",
"Richard",
""
]
] | Gravitational waves (GW), emanating from binary black holes (BBH), encode vital information about their source. GW signals enable us to deduce key properties of the BBH population across the universe, including mass, spin, and eccentricity distribution. While the masses and spins of binary components are already recogn... |
2312.04451 | Vladim\'ir Balek | Vladim\'ir Balek, Barbora Bezd\v{e}kov\'a, Ji\v{r}\'i Bi\v{c}\'ak | Radiation in the black hole - plasma system: propagation in equatorial
plane | 33 pages, 5 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Effect of cold plasma on the form of rays propagating in the equatorial plane
of a rotating black hole is investigated. Two kinds of regions in the
radius-impact parameter plane allowed for the rays are constructed: for
radiation with a given frequency at infinity and for radiation with a given
``telescope frequency'... | [
{
"created": "Thu, 7 Dec 2023 17:19:56 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Dec 2023 15:42:46 GMT",
"version": "v2"
}
] | 2023-12-20 | [
[
"Balek",
"Vladimír",
""
],
[
"Bezděková",
"Barbora",
""
],
[
"Bičák",
"Jiří",
""
]
] | Effect of cold plasma on the form of rays propagating in the equatorial plane of a rotating black hole is investigated. Two kinds of regions in the radius-impact parameter plane allowed for the rays are constructed: for radiation with a given frequency at infinity and for radiation with a given ``telescope frequency'' ... |
1510.03058 | Andrea Fuster | Andrea Fuster and Cornelia Pabst | Finsler pp-waves | 10 pages, minor corrections, references added | Phys. Rev. D 94, 104072 (2016) | 10.1103/PhysRevD.94.104072 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we present a Finslerian version of the well-known pp-waves,
which generalizes the very special relativity (VSR) line element. Our Finsler
pp-waves are an exact solution of Finslerian Einstein's equations in vacuum.
| [
{
"created": "Sun, 11 Oct 2015 14:36:08 GMT",
"version": "v1"
},
{
"created": "Fri, 20 May 2016 10:15:49 GMT",
"version": "v2"
}
] | 2016-12-07 | [
[
"Fuster",
"Andrea",
""
],
[
"Pabst",
"Cornelia",
""
]
] | In this work we present a Finslerian version of the well-known pp-waves, which generalizes the very special relativity (VSR) line element. Our Finsler pp-waves are an exact solution of Finslerian Einstein's equations in vacuum. |
2301.08032 | Pujian Mao | Pujian Mao, Jun-Bao Wu, Xiaoning Wu | Angular momentum and memory effect | v2: interpretation improved, published version | Phys. Rev. D 107, L101501 (2023) | 10.1103/PhysRevD.107.L101501 | USTC-ICTS/PCFT-23-03 | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | It is a long-standing problem in general relativity that the notion of
angular momentum of an isolated system has supertranslation ambiguity. In this
paper, we argue that the ambiguity is essentially because of the gravitational
wave memory. When properly subtracting the memory effect of the observer, one
can introdu... | [
{
"created": "Thu, 19 Jan 2023 12:11:42 GMT",
"version": "v1"
},
{
"created": "Tue, 16 May 2023 00:50:40 GMT",
"version": "v2"
}
] | 2023-05-17 | [
[
"Mao",
"Pujian",
""
],
[
"Wu",
"Jun-Bao",
""
],
[
"Wu",
"Xiaoning",
""
]
] | It is a long-standing problem in general relativity that the notion of angular momentum of an isolated system has supertranslation ambiguity. In this paper, we argue that the ambiguity is essentially because of the gravitational wave memory. When properly subtracting the memory effect of the observer, one can introduce... |
1009.5510 | Tomi Koivisto | Tomi Koivisto, Tomislav Prokopec | Quantum backreaction in evolving FLRW spacetimes | 23 pages, 6 figures | Phys.Rev.D83:044015,2011 | 10.1103/PhysRevD.83.044015 | ITP-UU-10/34, SPIN-10/29 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum fluctuations of a nonminimally coupled scalar field in D-dimensional
homogeneous and isotropic background are calculated within the operator
formalism in curved models with time evolutions of the scale factor that allow
smooth transitions between contracting and expanding and between decelerating
and accelera... | [
{
"created": "Tue, 28 Sep 2010 09:57:19 GMT",
"version": "v1"
}
] | 2011-02-18 | [
[
"Koivisto",
"Tomi",
""
],
[
"Prokopec",
"Tomislav",
""
]
] | Quantum fluctuations of a nonminimally coupled scalar field in D-dimensional homogeneous and isotropic background are calculated within the operator formalism in curved models with time evolutions of the scale factor that allow smooth transitions between contracting and expanding and between decelerating and accelerati... |
1507.06492 | Kevin Ludwick | Kevin J. Ludwick | Examining the Viability of Phantom Dark Energy | 22 pages, 5 figures; emphasized that models with w>-1 can have
negative kinetic energy with perturbations and included a plot showing this | Phys. Rev. D 92, 063019 (2015) | 10.1103/PhysRevD.92.063019 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the standard cosmological framework of the 0th-order FLRW metric and the
use of perfect fluids in the stress-energy tensor, dark energy with an
equation-of-state parameter $w < -1$ (known as phantom dark energy) implies
negative kinetic energy and vacuum instability when modeled as a scalar field.
However, the acc... | [
{
"created": "Thu, 23 Jul 2015 13:48:49 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Sep 2015 20:09:29 GMT",
"version": "v2"
}
] | 2015-10-07 | [
[
"Ludwick",
"Kevin J.",
""
]
] | In the standard cosmological framework of the 0th-order FLRW metric and the use of perfect fluids in the stress-energy tensor, dark energy with an equation-of-state parameter $w < -1$ (known as phantom dark energy) implies negative kinetic energy and vacuum instability when modeled as a scalar field. However, the accep... |
1211.1718 | Sebastian Szybka | Piotr T. Chru\'sciel, Christa R. \"Olz, Sebastian J. Szybka | Space-time diagrammatics | 41 pages, minor changes and corrections | Phys.Rev.D86:124041,2012 | 10.1103/PhysRevD.86.124041 | UWThPh-2012-26 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a new class of two-dimensional diagrams, the \emph{projection
diagrams}, as a tool to visualize the global structure of space-times. We
construct the diagrams for several metrics of interest, including the
Kerr-Newman - (anti) de Sitter family, with or without cosmological constant,
and the Emparan-Reall... | [
{
"created": "Wed, 7 Nov 2012 22:52:59 GMT",
"version": "v1"
},
{
"created": "Sun, 20 Jan 2013 14:33:54 GMT",
"version": "v2"
}
] | 2013-01-22 | [
[
"Chruściel",
"Piotr T.",
""
],
[
"Ölz",
"Christa R.",
""
],
[
"Szybka",
"Sebastian J.",
""
]
] | We introduce a new class of two-dimensional diagrams, the \emph{projection diagrams}, as a tool to visualize the global structure of space-times. We construct the diagrams for several metrics of interest, including the Kerr-Newman - (anti) de Sitter family, with or without cosmological constant, and the Emparan-Reall b... |
2305.01603 | Andreas Wipf | M. Schweizer, N. Straumann, A. Wipf | Post-Newtonian Generation of Gravitational Waves in a Theory of Gravity
with Torsion | Published version: General Relativity and Gravitation, Vol. 12 (1980)
951-961 doi: 10.1007/BF00757366 arXiv-ed February 1980; LaTeX-ed May 1, 2023 | General Relativity and Gravitation, Vol. 12 (1980) 951-961 | 10.1007/BF00757366 | SIN-PR-80-008 | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We adapt the post-Newtonian gravitational-radiation methods developed within
general relativity by Epstein and Wagoner to the gravitation theory with
torsion, recently proposed by Hehl et al., and show that the two theories
predict in this approximation the same gravitational radiation losses. Since
they agree also o... | [
{
"created": "Tue, 2 May 2023 17:06:21 GMT",
"version": "v1"
}
] | 2023-05-03 | [
[
"Schweizer",
"M.",
""
],
[
"Straumann",
"N.",
""
],
[
"Wipf",
"A.",
""
]
] | We adapt the post-Newtonian gravitational-radiation methods developed within general relativity by Epstein and Wagoner to the gravitation theory with torsion, recently proposed by Hehl et al., and show that the two theories predict in this approximation the same gravitational radiation losses. Since they agree also on ... |
gr-qc/0309025 | Robert T. Jantzen | Robert T. Jantzen | Higher Dimensional Cosmological Models: the View from Above | 24 latex(2e) article style pages with one EPS figure, from: Proc.
26th Li\`ege Int. Astrophys. Colloq., J. Demaret, ed. (Li\`ege University
Press, Li\`ege, 1987), hard to access proceedings, worth not forgetting | null | null | null | gr-qc | null | A broader perspective is suggested for the study of higher dimensional
cosmological models. [1986: Considerations involving the Einstein constraints
and the Ricci form of the evolution equations for spatially homogeneous
spacetimes in 4 or more dimensions in the Taub time gauge (constant densitized
lapse) are used to... | [
{
"created": "Thu, 4 Sep 2003 14:00:29 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Jantzen",
"Robert T.",
""
]
] | A broader perspective is suggested for the study of higher dimensional cosmological models. [1986: Considerations involving the Einstein constraints and the Ricci form of the evolution equations for spatially homogeneous spacetimes in 4 or more dimensions in the Taub time gauge (constant densitized lapse) are used to s... |
gr-qc/0611122 | Sante Carloni | Sante Carloni, Peter K. S. Dunsby | A dynamical system approach to higher order gravity | 6 pages, 1 figure, 2 tables, talk given at IRGAC 2006, July 2006 | J.Phys.A40:6919-6926,2007 | 10.1088/1751-8113/40/25/S40 | null | gr-qc | null | The dynamical system approach has recently acquired great importance in the
investigation on higher order theories of gravity. In this talk I review the
main results and I give brief comments on the perspectives for further
developments.
| [
{
"created": "Thu, 23 Nov 2006 10:45:16 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Carloni",
"Sante",
""
],
[
"Dunsby",
"Peter K. S.",
""
]
] | The dynamical system approach has recently acquired great importance in the investigation on higher order theories of gravity. In this talk I review the main results and I give brief comments on the perspectives for further developments. |
gr-qc/9610061 | Alicia Sintes | A. A. Coley | Kinematic Self-Similarity | 29 pages, AmsTeX | Class.Quant.Grav. 14 (1997) 87-118 | 10.1088/0264-9381/14/1/012 | null | gr-qc | null | Self-similarity in general relativity is briefly reviewed and the differences
between self-similarity of the first kind and generalized self-similarity are
discussed. The covariant notion of a kinematic self-similarity in the context
of relativistic fluid mechanics is defined. Various mathematical and physical
proper... | [
{
"created": "Fri, 25 Oct 1996 20:07:08 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Coley",
"A. A.",
""
]
] | Self-similarity in general relativity is briefly reviewed and the differences between self-similarity of the first kind and generalized self-similarity are discussed. The covariant notion of a kinematic self-similarity in the context of relativistic fluid mechanics is defined. Various mathematical and physical properti... |
2007.13328 | Salvatore Capozziello | Salvatore Capozziello, Carlo Alberto Mantica, and Luca Guido Molinari | General properties of $\mathbf {f(R)}$ gravity vacuum solutions | 9 pages, accepted for publication in Int. Jou. Mod. Phys. D | null | 10.1142/S0218271820500893 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General properties of vacuum solutions of $f(R)$ gravity are obtained by the
condition that the divergence of the Weyl tensor is zero and $f''\neq 0$.
Specifically, a theorem states that the gradient of the curvature scalar,
$\nabla R$, is an eigenvector of the Ricci tensor and, if it is time-like, the
space-time is ... | [
{
"created": "Mon, 27 Jul 2020 07:03:20 GMT",
"version": "v1"
}
] | 2020-11-18 | [
[
"Capozziello",
"Salvatore",
""
],
[
"Mantica",
"Carlo Alberto",
""
],
[
"Molinari",
"Luca Guido",
""
]
] | General properties of vacuum solutions of $f(R)$ gravity are obtained by the condition that the divergence of the Weyl tensor is zero and $f''\neq 0$. Specifically, a theorem states that the gradient of the curvature scalar, $\nabla R$, is an eigenvector of the Ricci tensor and, if it is time-like, the space-time is a ... |
gr-qc/0612170 | John W. Barrett | John W. Barrett, Ileana Naish-Guzman | The Ponzano-Regge model and Reidemeister torsion | 4 pages. MG11 conference proceedings | null | null | null | gr-qc hep-th math.GT math.QA | null | The Ponzano-Regge model of three-dimensional quantum gravity is well-defined
when the observables satisfy a certain condition involving the twisted
cohomology. In this case, the partition function is defined in terms of the
Reidemeister torsion. Some consequences for the special cases of planar graphs
and knots are g... | [
{
"created": "Tue, 26 Dec 2006 21:53:13 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Barrett",
"John W.",
""
],
[
"Naish-Guzman",
"Ileana",
""
]
] | The Ponzano-Regge model of three-dimensional quantum gravity is well-defined when the observables satisfy a certain condition involving the twisted cohomology. In this case, the partition function is defined in terms of the Reidemeister torsion. Some consequences for the special cases of planar graphs and knots are giv... |
1908.06763 | Sarbari Guha Dr. | Sarbari Guha and Samarjit Chakraborty | On the gravitational entropy of accelerating black holes | 17 pages, 18 figures | International Journal of Modern Physics D, Vol. 29, No. 5 (2020) | 10.1142/S0218271820500340 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we have examined the validity of a proposed definition of
gravitational entropy in the context of accelerating black hole solutions of
the Einstein field equations, which represent the realistic black hole
solutions. We have adopted a phenomenological approach proposed in Rudjord et
al [20] and expanded... | [
{
"created": "Fri, 16 Aug 2019 15:50:46 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Dec 2019 18:19:10 GMT",
"version": "v2"
}
] | 2021-02-19 | [
[
"Guha",
"Sarbari",
""
],
[
"Chakraborty",
"Samarjit",
""
]
] | In this paper we have examined the validity of a proposed definition of gravitational entropy in the context of accelerating black hole solutions of the Einstein field equations, which represent the realistic black hole solutions. We have adopted a phenomenological approach proposed in Rudjord et al [20] and expanded b... |
gr-qc/0303064 | Alan D. Rendall | P. Noundjeu, N. Noutchegueme, A. D. Rendall | Existence of initial data satisfying the constraints for the spherically
symmetric Einstein-Vlasov-Maxwell system | 12 pages | J.Math.Phys. 45 (2004) 668-676 | 10.1063/1.1637713 | AEI-2003-033 | gr-qc | null | Using ODE techniques we prove the existence of large classes of initial data
satisfying the constraints for the spherically symmetric
Einstein-Vlasov-Maxwell system. These include data for which the ratio of total
charge to total mass is arbitrarily large.
| [
{
"created": "Tue, 18 Mar 2003 14:50:42 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Noundjeu",
"P.",
""
],
[
"Noutchegueme",
"N.",
""
],
[
"Rendall",
"A. D.",
""
]
] | Using ODE techniques we prove the existence of large classes of initial data satisfying the constraints for the spherically symmetric Einstein-Vlasov-Maxwell system. These include data for which the ratio of total charge to total mass is arbitrarily large. |
gr-qc/9811024 | Nobuyuki Sakai | Nobuyuki Sakai, Jun'ichi Yokoyama (YITP, Kyoto U.), Kei-ichi Maeda
(Waseda U.) | Monopole Inflation in Brans-Dicke Theory | 17 pages, revtex, including figures, discussions in more general
theories are added, to appear in Phys. Rev. D | Phys. Rev. D 59, 103504 (1999) | 10.1103/PhysRevD.59.103504 | YITP-98-63, WU-AP/74/98 | gr-qc astro-ph hep-ph hep-th | null | According to previous work, topological defects expand exponentially without
an end if the vacuum expectation value of the Higgs field is of the order of
the Planck mass. We extend the study of inflating topological defects to the
Brans-Dicke gravity. With the help of numerical simulation we investigate the
dynamics ... | [
{
"created": "Sat, 7 Nov 1998 14:56:57 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jan 1999 06:55:21 GMT",
"version": "v2"
}
] | 2016-08-25 | [
[
"Sakai",
"Nobuyuki",
"",
"YITP, Kyoto U."
],
[
"Yokoyama",
"Jun'ichi",
"",
"YITP, Kyoto U."
],
[
"Maeda",
"Kei-ichi",
"",
"Waseda U."
]
] | According to previous work, topological defects expand exponentially without an end if the vacuum expectation value of the Higgs field is of the order of the Planck mass. We extend the study of inflating topological defects to the Brans-Dicke gravity. With the help of numerical simulation we investigate the dynamics an... |
2007.04121 | Phongpichit Channuie | Ayan Banerjee (KwaZulu Natal U.), Takol Tangphati (Chulalongkorn U.),
Daris Samart (Khon Kaen U.), Phongpichit Channuie (Walailak U.) | Quark Stars in 4D Einstein-Gauss-Bonnet gravity with an Interacting
Quark Equation of State | v2: regularized scheme to the original 4D EGB theory added, version
accepted by ApJ. arXiv admin note: text overlap with arXiv:2006.00479 | Astrophys. J. 906 (2021) 114 | 10.3847/1538-4357/abc87f | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of gravitational waves (GWs) from the binary neutron star (BNS)
has opened a new window on the gravitational wave astronomy. With current
sensitivities, detectable signals coming from compact objects like neutron
stars turn out to be a crucial ingredient for probing their structure,
composition, and evo... | [
{
"created": "Wed, 8 Jul 2020 13:43:35 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Nov 2020 06:41:52 GMT",
"version": "v2"
}
] | 2021-01-15 | [
[
"Banerjee",
"Ayan",
"",
"KwaZulu Natal U."
],
[
"Tangphati",
"Takol",
"",
"Chulalongkorn U."
],
[
"Samart",
"Daris",
"",
"Khon Kaen U."
],
[
"Channuie",
"Phongpichit",
"",
"Walailak U."
]
] | The detection of gravitational waves (GWs) from the binary neutron star (BNS) has opened a new window on the gravitational wave astronomy. With current sensitivities, detectable signals coming from compact objects like neutron stars turn out to be a crucial ingredient for probing their structure, composition, and evolu... |
gr-qc/0503069 | Luca Lusanna | L.Lusanna (INFN, Firenze) and M.Pauri (Parma Univ.) | General covariance and the objectivity of space-time point-events | revtex, 23 pages | null | null | null | gr-qc astro-ph hep-th | null | "The last remnant of physical objectivity of space-time" is disclosed, beyond
the Leibniz equivalence, in the case of a continuous family of spatially
non-compact models of general relativity. The {\it physical individuation} of
point-events is furnished by the intrinsic degrees of freedom of the
gravitational field,... | [
{
"created": "Wed, 16 Mar 2005 15:46:06 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Sep 2005 16:01:13 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Lusanna",
"L.",
"",
"INFN, Firenze"
],
[
"Pauri",
"M.",
"",
"Parma Univ."
]
] | "The last remnant of physical objectivity of space-time" is disclosed, beyond the Leibniz equivalence, in the case of a continuous family of spatially non-compact models of general relativity. The {\it physical individuation} of point-events is furnished by the intrinsic degrees of freedom of the gravitational field, (... |
2303.07174 | Akhil Uniyal | Akhil Uniyal, Sayan Chakrabarti, Reggie C. Pantig, Ali \"Ovg\"un | Nonlinearly charged black holes: Shadow and Thin-accretion disk | null | New Astronomy 111, 102249 (2024) | 10.1016/j.newast.2024.102249 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we explore the effect of non-linear electrodynamics (NLED)
parameters and magnetic charges on various aspects of black holes, like how
they bend light, how they emit radiation, and how they appear as a shadow by
considering a thin accretion disk model. We initially examine the overall
behavior of the p... | [
{
"created": "Mon, 13 Mar 2023 15:15:01 GMT",
"version": "v1"
}
] | 2024-06-11 | [
[
"Uniyal",
"Akhil",
""
],
[
"Chakrabarti",
"Sayan",
""
],
[
"Pantig",
"Reggie C.",
""
],
[
"Övgün",
"Ali",
""
]
] | In this paper, we explore the effect of non-linear electrodynamics (NLED) parameters and magnetic charges on various aspects of black holes, like how they bend light, how they emit radiation, and how they appear as a shadow by considering a thin accretion disk model. We initially examine the overall behavior of the pho... |
2103.06167 | Gregorio Carullo | Gregorio Carullo, Danny Laghi, John Veitch, Walter Del Pozzo | Bekenstein-Hod Universal Bound on Information Emission Rate Is Obeyed by
LIGO-Virgo Binary Black Hole Remnants | 7 pages, 2 figures, 1 Table | Phys. Rev. Lett. 126, 161102 (2021) | 10.1103/PhysRevLett.126.161102 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Causality and the generalized laws of black hole thermodynamics imply a
bound, known as the \textit{Bekenstein--Hod universal bound}, on the
information emission rate of a perturbed system. Using a time-domain ringdown
analysis, we investigate whether remnant black holes produced by the
coalescences observed by Advan... | [
{
"created": "Wed, 10 Mar 2021 16:31:21 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Apr 2021 05:48:34 GMT",
"version": "v2"
}
] | 2021-04-28 | [
[
"Carullo",
"Gregorio",
""
],
[
"Laghi",
"Danny",
""
],
[
"Veitch",
"John",
""
],
[
"Del Pozzo",
"Walter",
""
]
] | Causality and the generalized laws of black hole thermodynamics imply a bound, known as the \textit{Bekenstein--Hod universal bound}, on the information emission rate of a perturbed system. Using a time-domain ringdown analysis, we investigate whether remnant black holes produced by the coalescences observed by Advance... |
1711.02306 | Sanchita Das Ms | Sanchita Das and Somenath Chakraborty | Bose-Einstein Condensation in a uniformly accelerated frame | 8 pages Latex file, one .eps figure | null | null | null | gr-qc astro-ph.SR cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we have investigated the possibility of Bose-Einstein
Condensation (BEC) in a frame undergoing uniform acceleration or in other
wards, in Rindler space associated with the uniformly accelerated frame. We
have followed a very simple conventional technique generally used in text book
level studies. It h... | [
{
"created": "Tue, 7 Nov 2017 06:38:14 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Nov 2017 09:08:31 GMT",
"version": "v2"
}
] | 2017-11-13 | [
[
"Das",
"Sanchita",
""
],
[
"Chakraborty",
"Somenath",
""
]
] | In this article we have investigated the possibility of Bose-Einstein Condensation (BEC) in a frame undergoing uniform acceleration or in other wards, in Rindler space associated with the uniformly accelerated frame. We have followed a very simple conventional technique generally used in text book level studies. It has... |
1507.07947 | Oihane F Blanco | Oihane F. Blanco and Andrea Moreira | Causal Behaviour on Carter spacetime | 12 pages, 4 figures | Av. Cienc. Ing. (Quito), 2015, Vol. 7, No. 1, Pags. A38-A46 | null | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we will focus on the causal character of Carter Spacetime (see
B. Carter, Causal structure in space-time, Gen. Rel. Grav. 1 4 337-406, 1971).
The importance of this spacetime is the following: for the causally best well
behaved spacetimes (the globally hyperbolic ones), there are several
characterization... | [
{
"created": "Tue, 28 Jul 2015 20:29:03 GMT",
"version": "v1"
}
] | 2015-07-30 | [
[
"Blanco",
"Oihane F.",
""
],
[
"Moreira",
"Andrea",
""
]
] | In this work we will focus on the causal character of Carter Spacetime (see B. Carter, Causal structure in space-time, Gen. Rel. Grav. 1 4 337-406, 1971). The importance of this spacetime is the following: for the causally best well behaved spacetimes (the globally hyperbolic ones), there are several characterizations ... |
1406.0290 | Ganim Gecim | Ganim Gecim and Yusuf Sucu | Hawking Radiation of Topological Massive Warped-AdS3 Black Hole Families | 6 pages, submitted to EPJC | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the Dirac particles tunnelling as a radiation of Warped
AdS$_{3}$ black hole family in Topological Massive Gravity. Using the
Hamilton-Jacobi method, we discuss tunnelling probability and Hawking
temperature of the spin-1/2 particles for the black hole and its extremal
cases. We observe that the Hawkin... | [
{
"created": "Mon, 2 Jun 2014 08:29:00 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Oct 2014 14:51:29 GMT",
"version": "v2"
}
] | 2014-10-16 | [
[
"Gecim",
"Ganim",
""
],
[
"Sucu",
"Yusuf",
""
]
] | We investigate the Dirac particles tunnelling as a radiation of Warped AdS$_{3}$ black hole family in Topological Massive Gravity. Using the Hamilton-Jacobi method, we discuss tunnelling probability and Hawking temperature of the spin-1/2 particles for the black hole and its extremal cases. We observe that the Hawking ... |
2311.13027 | Michail Chabanov | Michail Chabanov and Luciano Rezzolla | Numerical modelling of bulk viscosity in neutron stars | 21 pages, 15 figures | null | null | null | gr-qc astro-ph.HE nucl-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The early post-merger phase of a binary neutron-star coalescence is shaped by
characteristic rotational velocities as well as violent density oscillations
and offers the possibility to constrain the properties of neutron star matter
by observing the gravitational wave emission. One possibility to do so is the
investi... | [
{
"created": "Tue, 21 Nov 2023 22:26:48 GMT",
"version": "v1"
}
] | 2023-11-23 | [
[
"Chabanov",
"Michail",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | The early post-merger phase of a binary neutron-star coalescence is shaped by characteristic rotational velocities as well as violent density oscillations and offers the possibility to constrain the properties of neutron star matter by observing the gravitational wave emission. One possibility to do so is the investiga... |
2306.06279 | Paolo Valtancoli | P. Valtancoli | Euclidean black holes and spin connection | 11 pages, no figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The Euclidean method is usually discussed in the context of the metric
avoiding the typical delta of the conical singularity. We introduce a new way
to calculate the Hawking temperature using the vierbein and spin connection.
The conical singularity is seen globally through an effect on parallel
transport, the so cal... | [
{
"created": "Fri, 9 Jun 2023 22:06:39 GMT",
"version": "v1"
},
{
"created": "Fri, 22 Sep 2023 09:08:54 GMT",
"version": "v2"
}
] | 2023-09-25 | [
[
"Valtancoli",
"P.",
""
]
] | The Euclidean method is usually discussed in the context of the metric avoiding the typical delta of the conical singularity. We introduce a new way to calculate the Hawking temperature using the vierbein and spin connection. The conical singularity is seen globally through an effect on parallel transport, the so calle... |
2407.08775 | Aron Kovacs | Pau Figueras, Aaron Held, \'Aron D. Kov\'acs | Well-posed initial value formulation of general effective field theories
of gravity | 5 pages (+ 6 pages of Supplemental Material) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a proof that all polynomial higher-derivative effective field
theories of vacuum gravity admit a well-posed initial value formulation when
augmented by suitable regularising terms. These regularising terms can be
obtained by field redefinitions and allow to rewrite the resulting equations of
motion as a sy... | [
{
"created": "Thu, 11 Jul 2024 18:00:01 GMT",
"version": "v1"
}
] | 2024-07-15 | [
[
"Figueras",
"Pau",
""
],
[
"Held",
"Aaron",
""
],
[
"Kovács",
"Áron D.",
""
]
] | We provide a proof that all polynomial higher-derivative effective field theories of vacuum gravity admit a well-posed initial value formulation when augmented by suitable regularising terms. These regularising terms can be obtained by field redefinitions and allow to rewrite the resulting equations of motion as a syst... |
gr-qc/9810010 | Jiseong Park | Jiseong Park | Static Solutions of the Einstein Equations for Spherically Symmetric
Elastic Bodies | 21 pages, TeX | Gen.Rel.Grav. 32 (2000) 235-252 | 10.1023/A:1001875224949 | AEI-084 | gr-qc | null | The paper is concerned with the Einstein equations for a spherically
symmetric static distribution of anisotropic matter. The equations are cast
into a system of Fuchsian type ODE for certain scalar invariants of the strain.
And then the existence and regularity of this ODE is studied under general
constitutive relat... | [
{
"created": "Sun, 4 Oct 1998 16:35:47 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Park",
"Jiseong",
""
]
] | The paper is concerned with the Einstein equations for a spherically symmetric static distribution of anisotropic matter. The equations are cast into a system of Fuchsian type ODE for certain scalar invariants of the strain. And then the existence and regularity of this ODE is studied under general constitutive relatio... |
2407.20470 | Isabella Pretto | Isabella G. Pretto, Mark A. Scheel and Saul A. Teukolsky | Automated determination of the end time of junk radiation in binary
black hole simulations | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When numerically solving Einstein's equations for the evolution of binary
black holes, physical imperfections in the initial data manifest as a
transient, high-frequency pulse of ''junk radiation.'' This unphysical signal
must be removed before the waveform can be used. Improvements in the efficiency
of numerical sim... | [
{
"created": "Tue, 30 Jul 2024 00:14:04 GMT",
"version": "v1"
}
] | 2024-07-31 | [
[
"Pretto",
"Isabella G.",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Teukolsky",
"Saul A.",
""
]
] | When numerically solving Einstein's equations for the evolution of binary black holes, physical imperfections in the initial data manifest as a transient, high-frequency pulse of ''junk radiation.'' This unphysical signal must be removed before the waveform can be used. Improvements in the efficiency of numerical simul... |
1101.3171 | Leo Brewin | Leo Brewin | An Einstein-Bianchi system for Smooth Lattice General Relativity. I. The
Schwarzschild spacetime | minor changes to conform with companion paper, new appendix | null | 10.1103/PhysRevD.85.124045 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The second Bianchi identity can be recast as an evolution equation for the
Riemann curvatures. Here we will report on such a system for a vacuum static
spherically symmetric spacetime. This is the first of two papers. In the
following paper we will extend the ideas developed here to general vacuum
spacetimes. In this... | [
{
"created": "Mon, 17 Jan 2011 10:32:19 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Apr 2011 15:14:06 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Brewin",
"Leo",
""
]
] | The second Bianchi identity can be recast as an evolution equation for the Riemann curvatures. Here we will report on such a system for a vacuum static spherically symmetric spacetime. This is the first of two papers. In the following paper we will extend the ideas developed here to general vacuum spacetimes. In this p... |
1005.3778 | Douglas A. Singleton | Douglas Singleton, Elias C. Vagenas, Tao Zhu, Ji-Rong Ren | Insights and possible resolution to the information loss paradox via the
tunneling picture | 16 pages revtex, 4 figures. The formula for temperature is corrected.
Main conclusion about the possible resolution to information loss paradox
unchanged. Erratum to be published JHEP | JHEP 1008:089,2010; Erratum-ibid.1101:021,2011 | 10.1007/JHEP08(2010)089 10.1007/JHEP01(2011)021 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper investigates the information loss paradox in the WKB/tunneling
picture of Hawking radiation. In the tunneling picture one can obtain the
tunneling amplitude to all orders in $\hbar$. However all terms beyond the
lowest, semi-classical term involve unknown constants. Despite this we find
that one can still ... | [
{
"created": "Thu, 20 May 2010 18:17:36 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Jul 2010 06:17:13 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Sep 2010 00:27:10 GMT",
"version": "v3"
},
{
"created": "Fri, 7 Jan 2011 05:24:15 GMT",
"version": "v4"
}
] | 2011-01-17 | [
[
"Singleton",
"Douglas",
""
],
[
"Vagenas",
"Elias C.",
""
],
[
"Zhu",
"Tao",
""
],
[
"Ren",
"Ji-Rong",
""
]
] | This paper investigates the information loss paradox in the WKB/tunneling picture of Hawking radiation. In the tunneling picture one can obtain the tunneling amplitude to all orders in $\hbar$. However all terms beyond the lowest, semi-classical term involve unknown constants. Despite this we find that one can still ar... |
1408.3553 | Abdul Jawad | M. Sharif and Abdul Jawad | Analysis of Generalized Ghost Version of Pilgrim Dark Energy | 17 pages, 8 figures | Astrophys. Space Sci. 351(2014)321 | 10.1007/s10509-014-1833-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The proposal of pilgrim dark energy is based on the speculation that
phantom-like dark energy possesses enough resistive force to preclude the black
hole formation in the later universe. We explore this phenomenon by assuming
the generalized ghost version of pilgrim dark energy. We find that most of the
values of the... | [
{
"created": "Fri, 20 Dec 2013 10:37:49 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Aug 2014 05:52:45 GMT",
"version": "v2"
}
] | 2015-06-22 | [
[
"Sharif",
"M.",
""
],
[
"Jawad",
"Abdul",
""
]
] | The proposal of pilgrim dark energy is based on the speculation that phantom-like dark energy possesses enough resistive force to preclude the black hole formation in the later universe. We explore this phenomenon by assuming the generalized ghost version of pilgrim dark energy. We find that most of the values of the i... |
2204.08217 | Masato Minamitsuji | Masato Minamitsuji, Antonio De Felice, Shinji Mukohyama, Michele
Oliosi | Static and spherically symmetric general relativity solutions in Minimal
Theory of Bigravity | 19 pages | null | 10.1103/PhysRevD.105.123026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate static and spherically symmetric solutions in the Minimal
Theory of Bigravity (MTBG). First, we show that a pair of Schwarzschild-de
Sitter spacetimes with different cosmological constants and black hole masses
written in the spatially-flat Gullstrand-Painlev\'e (GP) coordinates is a
solution in the se... | [
{
"created": "Mon, 18 Apr 2022 08:39:54 GMT",
"version": "v1"
}
] | 2022-07-13 | [
[
"Minamitsuji",
"Masato",
""
],
[
"De Felice",
"Antonio",
""
],
[
"Mukohyama",
"Shinji",
""
],
[
"Oliosi",
"Michele",
""
]
] | We investigate static and spherically symmetric solutions in the Minimal Theory of Bigravity (MTBG). First, we show that a pair of Schwarzschild-de Sitter spacetimes with different cosmological constants and black hole masses written in the spatially-flat Gullstrand-Painlev\'e (GP) coordinates is a solution in the self... |
1912.05389 | Connor McIsaac | Connor McIsaac, David Keitel, Thomas Collett, Ian Harry, Simone
Mozzon, Oliver Edy, David Bacon | Search for strongly lensed counterpart images of binary black hole
mergers in the first two LIGO observing runs | 16 pages. Comments welcome. Data release:
https://github.com/icg-gravwaves/lensed-o1-o2-data-release. Version accepted
for publication in PRD. Supplement merged into main paper following PRD
style. Various updates/improvements during review process. Typos corrected | Phys. Rev. D 102, 084031 (2020) | 10.1103/PhysRevD.102.084031 | LIGO-P1900360 | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Strong gravitational lensing can produce multiple images of the same
gravitational-wave signal, each arriving at different times and with different
magnification. Previous work has explored if lensed pairs exist among the known
high-significance events and found no evidence of this. However, the
possibility remains t... | [
{
"created": "Wed, 11 Dec 2019 15:30:42 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Sep 2020 13:57:25 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Oct 2020 14:48:32 GMT",
"version": "v3"
}
] | 2020-10-21 | [
[
"McIsaac",
"Connor",
""
],
[
"Keitel",
"David",
""
],
[
"Collett",
"Thomas",
""
],
[
"Harry",
"Ian",
""
],
[
"Mozzon",
"Simone",
""
],
[
"Edy",
"Oliver",
""
],
[
"Bacon",
"David",
""
]
] | Strong gravitational lensing can produce multiple images of the same gravitational-wave signal, each arriving at different times and with different magnification. Previous work has explored if lensed pairs exist among the known high-significance events and found no evidence of this. However, the possibility remains tha... |
1602.00558 | Xinhe Meng | Deng Wang, Xin-He Meng | Geometric dark energy traversable wormholes constrained by astrophysical
observations | 17ps, 7figs | null | null | null | gr-qc astro-ph.CO hep-ph hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter, we introduce the astrophysical observations into the wormhole
research, which is not meant to general parameters constraints for the dark
energy models, in order to understand more about in which stage of the universe
evolutions wormholes may exist through the investigation of the evolution
behavior o... | [
{
"created": "Fri, 29 Jan 2016 13:30:42 GMT",
"version": "v1"
}
] | 2016-02-02 | [
[
"Wang",
"Deng",
""
],
[
"Meng",
"Xin-He",
""
]
] | In this letter, we introduce the astrophysical observations into the wormhole research, which is not meant to general parameters constraints for the dark energy models, in order to understand more about in which stage of the universe evolutions wormholes may exist through the investigation of the evolution behavior of ... |
1111.0418 | Eugen Radu | Eugen Radu and D. H. Tchrakian | Stable black hole solutions with non-Abelian fields | 8 pages, 3 figures | null | 10.1103/PhysRevD.85.084022 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct finite mass, asymptotically flat black hole solutions in d=4
Einstein-Yang-Mills theory augmented with higher order curvature terms of the
gauge field. They possess non-Abelian hair in addition to Coulomb electric
charge, and, below some non-zero critical temperature, they are
thermodynamically preferred... | [
{
"created": "Wed, 2 Nov 2011 08:27:57 GMT",
"version": "v1"
}
] | 2013-05-30 | [
[
"Radu",
"Eugen",
""
],
[
"Tchrakian",
"D. H.",
""
]
] | We construct finite mass, asymptotically flat black hole solutions in d=4 Einstein-Yang-Mills theory augmented with higher order curvature terms of the gauge field. They possess non-Abelian hair in addition to Coulomb electric charge, and, below some non-zero critical temperature, they are thermodynamically preferred o... |
1603.05449 | Henrik Zinkernagel | Svend E. Rugh and Henrik Zinkernagel | Limits of time in cosmology | 20 pages, 1 figure. To appear in "The Philosophy of Cosmology";
edited by K. Chamcham, J. Silk, J. Barrow and S. Saunders. Cambridge
University Press, 2016 | null | null | null | gr-qc astro-ph.CO hep-th physics.hist-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a discussion of some main ideas in our project about the physical
foundation of the time concept in cosmology. It is standard to point to the
Planck scale (located at $\sim 10^{-43}$ seconds after a fictitious "Big Bang"
point) as a limit for how far back we may extrapolate the standard cosmological
model.... | [
{
"created": "Thu, 17 Mar 2016 12:28:46 GMT",
"version": "v1"
}
] | 2016-03-18 | [
[
"Rugh",
"Svend E.",
""
],
[
"Zinkernagel",
"Henrik",
""
]
] | We provide a discussion of some main ideas in our project about the physical foundation of the time concept in cosmology. It is standard to point to the Planck scale (located at $\sim 10^{-43}$ seconds after a fictitious "Big Bang" point) as a limit for how far back we may extrapolate the standard cosmological model. I... |
2108.02152 | Nikolaos Mavromatos | Nick E. Mavromatos | Geometrical origins of the Universe dark sector: string-inspired torsion
and anomalies as seeds for inflation and dark matter | 37 pages revtex, 2 pdf figures incorporated | Phil. Trans. R. Soc. A 380: 20210188 (2022) | 10.1098/rsta.2021.0188 | KCL-PH-TH/2021-62 | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a modest attempt to present potentially new paradigms in Cosmology,
including its inflationary epoch, and initiate discussions, I review in this
article some novel, string-inspired cosmological models, which entail a purely
geometrical origin of the Dark sector of the Universe but also of its observed
matter-antim... | [
{
"created": "Wed, 4 Aug 2021 16:31:30 GMT",
"version": "v1"
}
] | 2022-03-17 | [
[
"Mavromatos",
"Nick E.",
""
]
] | In a modest attempt to present potentially new paradigms in Cosmology, including its inflationary epoch, and initiate discussions, I review in this article some novel, string-inspired cosmological models, which entail a purely geometrical origin of the Dark sector of the Universe but also of its observed matter-antimat... |
1709.09806 | Zhengcheng Gu | Zheng-Cheng Gu | The emergence of 3+1D Einstein gravity from topological gravity | 5 pages, added references and modified the noncommutative geometry
part | null | null | null | gr-qc cond-mat.str-el hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum field theory successfully explains the origin of all fundamental
forces except gravity due to the renormalizability problem. In this paper, we
proposed a topological scenario to understand this puzzle. First, we proposed a
$3+1$D topological (quantum) gravity theory which is renormalizable, and it can
be rega... | [
{
"created": "Thu, 28 Sep 2017 05:25:17 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Apr 2019 16:28:12 GMT",
"version": "v2"
}
] | 2019-04-11 | [
[
"Gu",
"Zheng-Cheng",
""
]
] | Quantum field theory successfully explains the origin of all fundamental forces except gravity due to the renormalizability problem. In this paper, we proposed a topological scenario to understand this puzzle. First, we proposed a $3+1$D topological (quantum) gravity theory which is renormalizable, and it can be regard... |
1310.5167 | Flavio Mercati | Julian Barbour, Tim Koslowski and Flavio Mercati | A Gravitational Origin of the Arrows of Time | 44 pages + 14 pages appendices and references. 8 figures and 1 table | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The only widely accepted explanation for the various arrows of time that
everywhere and at all epochs point in the same direction is the `past
hypothesis': the Universe had a very special low-entropy initial state. We
present the first evidence for an alternative conjecture: the arrows exist in
all solutions of the g... | [
{
"created": "Fri, 18 Oct 2013 21:19:53 GMT",
"version": "v1"
}
] | 2014-12-11 | [
[
"Barbour",
"Julian",
""
],
[
"Koslowski",
"Tim",
""
],
[
"Mercati",
"Flavio",
""
]
] | The only widely accepted explanation for the various arrows of time that everywhere and at all epochs point in the same direction is the `past hypothesis': the Universe had a very special low-entropy initial state. We present the first evidence for an alternative conjecture: the arrows exist in all solutions of the gra... |
gr-qc/0010107 | Antonio Teixeira | A.F.F. Teixeira (Centro Brasileiro de Pesquisas Fisicas) | Cosmic crystallography: the hyperbolic isometries | 18 pages, 16 figures included | null | null | null | gr-qc | null | All orientation preserving isometries of the hyperbolic three-space are
studied, and the probability density of conjugate pair separations for each
isometry is presented. The study is relevant for the cosmic crystallography,
and is the theoretical counterpart of the mean histograms arising from computer
simulations o... | [
{
"created": "Sun, 29 Oct 2000 13:38:25 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Teixeira",
"A. F. F.",
"",
"Centro Brasileiro de Pesquisas Fisicas"
]
] | All orientation preserving isometries of the hyperbolic three-space are studied, and the probability density of conjugate pair separations for each isometry is presented. The study is relevant for the cosmic crystallography, and is the theoretical counterpart of the mean histograms arising from computer simulations of ... |
1004.3849 | Luca Baiotti | Luca Baiotti, Ian Hawke, Pedro J. Montero, Luciano Rezzolla | A new three-dimensional general-relativistic hydrodynamics code | Published in 2003, this is the first article on the Whisky code. | Mem. S.A.It. Suppl. Vol. 1, 210 (2003) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new three-dimensional general relativistic hydrodynamics code,
the Whisky code. This code incorporates the expertise developed over the past
years in the numerical solution of Einstein equations and of the hydrodynamics
equations in a curved spacetime, and is the result of a collaboration of
several Euro... | [
{
"created": "Thu, 22 Apr 2010 07:03:05 GMT",
"version": "v1"
}
] | 2010-04-23 | [
[
"Baiotti",
"Luca",
""
],
[
"Hawke",
"Ian",
""
],
[
"Montero",
"Pedro J.",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | We present a new three-dimensional general relativistic hydrodynamics code, the Whisky code. This code incorporates the expertise developed over the past years in the numerical solution of Einstein equations and of the hydrodynamics equations in a curved spacetime, and is the result of a collaboration of several Europe... |
2203.16327 | Claudio Nassif Cruz | Cl\'audio Nassif Cruz | Deformed Special Relativity with an invariant minimum speed as an
explanation of the cosmological constant | 9 pages, 2 figures | Pramana J. Phys., 96:55 (2022) | 10.1007/s12043-022-02296-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper shows the need of the emergence of a universal minimum speed in
the space-time by means of a more thorough investigation of Dirac's large
number hypothesis (LNH). We will realize that there should be a minimum speed
$V$ with the same status of the invariance of the speed of light $c$, however
$V$ has gravi... | [
{
"created": "Tue, 29 Mar 2022 02:55:33 GMT",
"version": "v1"
}
] | 2022-03-31 | [
[
"Cruz",
"Cláudio Nassif",
""
]
] | This paper shows the need of the emergence of a universal minimum speed in the space-time by means of a more thorough investigation of Dirac's large number hypothesis (LNH). We will realize that there should be a minimum speed $V$ with the same status of the invariance of the speed of light $c$, however $V$ has gravita... |
gr-qc/0102030 | A. Yeranyan | R. M. Avakyan, E. V. Chubaryan, A. H. Yeranyan | ''Homogeneous'' Gravitational Field in General Relativity ? | 6 pages, 2 figures, LaTeX | null | null | null | gr-qc | null | The gravitation field of the flat plate was investigated. It have been shown
that there exist the internal solution of Einstein equations sewed together
with external one, which described a ''homogeneous'' gravitational field.
| [
{
"created": "Thu, 8 Feb 2001 04:37:38 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Avakyan",
"R. M.",
""
],
[
"Chubaryan",
"E. V.",
""
],
[
"Yeranyan",
"A. H.",
""
]
] | The gravitation field of the flat plate was investigated. It have been shown that there exist the internal solution of Einstein equations sewed together with external one, which described a ''homogeneous'' gravitational field. |
1006.5848 | Henrik Zinkernagel | Svend E. Rugh, Henrik Zinkernagel | Weyl's principle, cosmic time and quantum fundamentalism | To appear in the section on "Physical and philosophical perspectives
on probability and time" in S. Hartmann et al. (eds.) "Explanation,
Prediction and Confirmation", Springer's The Philosophy of Science in a
European Perspective book series | null | null | null | gr-qc astro-ph.CO quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the necessary physical underpinnings for setting up the
cosmological standard model with a global cosmic time parameter. In particular,
we discuss the role of Weyl's principle which asserts that cosmic matter moves
according to certain regularity requirements. After a brief historical
introduction to Weyl'... | [
{
"created": "Wed, 30 Jun 2010 13:17:22 GMT",
"version": "v1"
}
] | 2010-07-01 | [
[
"Rugh",
"Svend E.",
""
],
[
"Zinkernagel",
"Henrik",
""
]
] | We examine the necessary physical underpinnings for setting up the cosmological standard model with a global cosmic time parameter. In particular, we discuss the role of Weyl's principle which asserts that cosmic matter moves according to certain regularity requirements. After a brief historical introduction to Weyl's ... |
0806.0845 | Jose' P. S. Lemos | Jos\'e P. S. Lemos, Oleg B. Zaslavskii | Black hole mimickers: regular versus singular behavior | 30 pages, 1 figure, references added, minor changes in the revised
version | Phys.Rev.D78:024040,2008 | 10.1103/PhysRevD.78.024040 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole mimickers are possible alternatives to black holes, they would
look observationally almost like black holes but would have no horizon. The
properties in the near-horizon region where gravity is strong can be quite
different for both type of objects, but at infinity it could be difficult to
discern black ho... | [
{
"created": "Wed, 4 Jun 2008 19:49:09 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Aug 2008 22:09:39 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Lemos",
"José P. S.",
""
],
[
"Zaslavskii",
"Oleg B.",
""
]
] | Black hole mimickers are possible alternatives to black holes, they would look observationally almost like black holes but would have no horizon. The properties in the near-horizon region where gravity is strong can be quite different for both type of objects, but at infinity it could be difficult to discern black hole... |
gr-qc/0511018 | David Brown | David Brown | The Midpoint Rule as a Variational--Symplectic Integrator. I.
Hamiltonian Systems | 11 pages, 8 figures, REVTeX | Phys.Rev. D73 (2006) 024001 | 10.1103/PhysRevD.73.024001 | null | gr-qc physics.comp-ph | null | Numerical algorithms based on variational and symplectic integrators exhibit
special features that make them promising candidates for application to general
relativity and other constrained Hamiltonian systems. This paper lays part of
the foundation for such applications. The midpoint rule for Hamilton's
equations is... | [
{
"created": "Thu, 3 Nov 2005 21:23:46 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Brown",
"David",
""
]
] | Numerical algorithms based on variational and symplectic integrators exhibit special features that make them promising candidates for application to general relativity and other constrained Hamiltonian systems. This paper lays part of the foundation for such applications. The midpoint rule for Hamilton's equations is e... |
1503.06780 | Boris Latosh | S. O. Alexeyev, B. N. Latosh, A. N. Petrov | Maeda-Dadhich Solutions as Real Black Holes | null | Phys. Rev. D 92, 104046, 2015 | 10.1103/PhysRevD.92.104046 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A four-dimensional static Schwarzschild-like solution obtained in [3]-[6] in
the frames of the Einstein-Gauss-Bonnet gravity at the Kaluza-Klein split is
analyzed. The matter in these solutions is created by auxiliary dimensions. The
main goal of our work is to study physically sensible characteristics, which
could b... | [
{
"created": "Mon, 23 Mar 2015 19:42:34 GMT",
"version": "v1"
},
{
"created": "Sat, 2 May 2015 16:07:07 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Jun 2015 16:52:27 GMT",
"version": "v3"
},
{
"created": "Tue, 18 Aug 2015 13:14:20 GMT",
"version": "v4"
}
] | 2016-01-07 | [
[
"Alexeyev",
"S. O.",
""
],
[
"Latosh",
"B. N.",
""
],
[
"Petrov",
"A. N.",
""
]
] | A four-dimensional static Schwarzschild-like solution obtained in [3]-[6] in the frames of the Einstein-Gauss-Bonnet gravity at the Kaluza-Klein split is analyzed. The matter in these solutions is created by auxiliary dimensions. The main goal of our work is to study physically sensible characteristics, which could be ... |
0705.0080 | Michael Ibison | M. Ibison | Cosmological test of the Yilmaz theory of gravity | null | Class.Quant.Grav.23:577-589,2006 | 10.1088/0264-9381/23/3/001 | null | gr-qc | null | We test the Yilmaz theory of gravitation by working out the corresponding
Friedmann-type equations generated by assuming the Friedmann-Robertson-Walker
cosmological metrics. In the case that space is flat the theory is consistent
only with either a completely empty universe or a negative energy vacuum that
decays to ... | [
{
"created": "Tue, 1 May 2007 06:50:20 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Ibison",
"M.",
""
]
] | We test the Yilmaz theory of gravitation by working out the corresponding Friedmann-type equations generated by assuming the Friedmann-Robertson-Walker cosmological metrics. In the case that space is flat the theory is consistent only with either a completely empty universe or a negative energy vacuum that decays to pr... |
gr-qc/9908036 | R. S. Bhalerao | B. Ram (New Mexico State University) | The Mass Quantum and Black Hole Entropy | final version which appeared in Phys. Lett. A | Phys.Lett. A265 (2000) 1-4 | 10.1016/S0375-9601(99)00868-3 | null | gr-qc hep-th | null | We give a method in which a quantum of mass equal to twice the Planck mass
arises naturally. Then using Bose-Einstein statistics we derive an expression
for the black hole entropy which physically tends to the Bekenstein-Hawking
formula.
| [
{
"created": "Wed, 11 Aug 1999 07:25:51 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Feb 2000 06:03:10 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Ram",
"B.",
"",
"New Mexico State University"
]
] | We give a method in which a quantum of mass equal to twice the Planck mass arises naturally. Then using Bose-Einstein statistics we derive an expression for the black hole entropy which physically tends to the Bekenstein-Hawking formula. |
0908.4593 | Mikolaj Korzynski | Mikolaj Korzynski | Covariant coarse-graining of inhomogeneous dust flow in General
Relativity | 17 pages, 5 figures. Version accepted in Classical and Quantum
Gravity. | Class.Quant.Grav.27:105015,2010 | 10.1088/0264-9381/27/10/105015 | AEI-2010-031 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new definition of coarse-grained quantities describing the dust flow in
General Relativity is proposed. It assigns the coarse--grained expansion, shear
and vorticity to finite-size comoving domains of fluid in a covariant,
coordinate-independent manner. The coarse--grained quantities are all
quasi-local functionals... | [
{
"created": "Mon, 31 Aug 2009 18:20:46 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Sep 2009 12:32:36 GMT",
"version": "v2"
},
{
"created": "Thu, 12 Nov 2009 01:15:18 GMT",
"version": "v3"
},
{
"created": "Fri, 12 Mar 2010 16:54:09 GMT",
"version": "v4"
}
] | 2014-11-20 | [
[
"Korzynski",
"Mikolaj",
""
]
] | A new definition of coarse-grained quantities describing the dust flow in General Relativity is proposed. It assigns the coarse--grained expansion, shear and vorticity to finite-size comoving domains of fluid in a covariant, coordinate-independent manner. The coarse--grained quantities are all quasi-local functionals, ... |
2004.05342 | Hrvoje Stefancic | Dalibor Perkovic and Hrvoje Stefancic | Barotropic fluid compatible parametrizations of dark energy | v1: 19 pages, 1 table, 4 figures. v2: minor changes, references
added. v3: version accepted in EPJC | null | 10.1140/epjc/s10052-020-8199-9 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Parametrizations of Equation of state parameter as a function of the scale
factor or redshift are frequently used in dark energy modeling. The question
investigated in this paper is if parametrizations proposed in the literature
are compatible with the dark energy being a barotropic fluid. The test of this
compatibil... | [
{
"created": "Sat, 11 Apr 2020 09:19:07 GMT",
"version": "v1"
},
{
"created": "Fri, 1 May 2020 20:23:09 GMT",
"version": "v2"
},
{
"created": "Wed, 15 Jul 2020 13:19:46 GMT",
"version": "v3"
}
] | 2020-08-26 | [
[
"Perkovic",
"Dalibor",
""
],
[
"Stefancic",
"Hrvoje",
""
]
] | Parametrizations of Equation of state parameter as a function of the scale factor or redshift are frequently used in dark energy modeling. The question investigated in this paper is if parametrizations proposed in the literature are compatible with the dark energy being a barotropic fluid. The test of this compatibilit... |
2012.00258 | Pardyumn Kumar Sahoo | Parbati Sahoo, P.H.R.S. Moraes, Marcelo M. Lapola, P.K. Sahoo | Traversable wormholes in the traceless $f(R,T)$ gravity | Revision submitted to IJMPD | International Journal of Modern Physics D, 30 (2021) 2150100 | 10.1142/S0218271821501005 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We present a traversable wormhole solution using the traceless $f(R,T)$
theory of gravity. In the $f(R,T)$ gravity, the Ricci scalar $R$ in the
Einstein-Hilbert action is replaced by a function of $R$ and trace of the
energy momentum tensor $T$. The traceless version of the $f(R,T)$ gravity gives
rise to a possible w... | [
{
"created": "Tue, 1 Dec 2020 04:22:27 GMT",
"version": "v1"
},
{
"created": "Sun, 30 May 2021 16:58:02 GMT",
"version": "v2"
},
{
"created": "Tue, 13 Jul 2021 07:55:02 GMT",
"version": "v3"
}
] | 2021-09-02 | [
[
"Sahoo",
"Parbati",
""
],
[
"Moraes",
"P. H. R. S.",
""
],
[
"Lapola",
"Marcelo M.",
""
],
[
"Sahoo",
"P. K.",
""
]
] | We present a traversable wormhole solution using the traceless $f(R,T)$ theory of gravity. In the $f(R,T)$ gravity, the Ricci scalar $R$ in the Einstein-Hilbert action is replaced by a function of $R$ and trace of the energy momentum tensor $T$. The traceless version of the $f(R,T)$ gravity gives rise to a possible wor... |
1406.4326 | Emma Jakobsson | Ingemar Bengtsson, S\"oren Holst, Emma Jakobsson | Classics Illustrated: Limits of Spacetimes | 23 pages, 13 figures | Class. Quantum Grav. 31 (2014) 205008 | 10.1088/0264-9381/31/20/205008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We carefully study the $e \rightarrow m$ and $e \rightarrow 0$ limits of the
Reissner-Nordstr\"om spacetime using Geroch's definition of limits of
spacetimes. This is implemented by embedding the one-parameter family of
spacetimes in anti-de Sitter space, and as a result we obtain metrically
correct Penrose diagrams.... | [
{
"created": "Tue, 17 Jun 2014 11:31:19 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Oct 2014 15:58:50 GMT",
"version": "v2"
}
] | 2014-10-07 | [
[
"Bengtsson",
"Ingemar",
""
],
[
"Holst",
"Sören",
""
],
[
"Jakobsson",
"Emma",
""
]
] | We carefully study the $e \rightarrow m$ and $e \rightarrow 0$ limits of the Reissner-Nordstr\"om spacetime using Geroch's definition of limits of spacetimes. This is implemented by embedding the one-parameter family of spacetimes in anti-de Sitter space, and as a result we obtain metrically correct Penrose diagrams. F... |
1810.08911 | Leo Medeiros Gouvea | R. R. Cuzinatto, L. G. Medeiros, P. J. Pompeia | Higher-order modified Starobinsky inflation | 32 pages, 10 figures, minor changes, new references added | JCAP 02 (2019) 055 | 10.1088/1475-7516/2019/02/055 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An extension of the Starobinsky model is proposed. Besides the usual
Starobinsky Lagrangian, a term proportional to the derivative of the scalar
curvature, $\nabla_{\mu}R\nabla^{\mu}R$, is considered. The analyzis is done in
the Einstein frame with the introduction of a scalar field and a vector field.
We show that i... | [
{
"created": "Sun, 21 Oct 2018 08:07:57 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Oct 2018 03:25:42 GMT",
"version": "v2"
},
{
"created": "Thu, 31 Jan 2019 19:37:02 GMT",
"version": "v3"
}
] | 2019-03-04 | [
[
"Cuzinatto",
"R. R.",
""
],
[
"Medeiros",
"L. G.",
""
],
[
"Pompeia",
"P. J.",
""
]
] | An extension of the Starobinsky model is proposed. Besides the usual Starobinsky Lagrangian, a term proportional to the derivative of the scalar curvature, $\nabla_{\mu}R\nabla^{\mu}R$, is considered. The analyzis is done in the Einstein frame with the introduction of a scalar field and a vector field. We show that inf... |
1807.06263 | Dao-Jun Liu | Yang Huang, Dao-Jun Liu, Xiang-hua Zhai and Xin-zhou Li | On the instability for massive scalar fields in Kerr-Newman spacetime | 8 pages, 5 figures, accepted for publication in PRD | Phys. Rev. D 98, 025021 (2018) | 10.1103/PhysRevD.98.025021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that a massive charged scalar field can trigger a superradiant
instability in the background of a Kerr-Newman black hole. In this paper, we
present a numerical study of such an instability by using the continued
fraction method. It is shown that for given a black hole, the unstable scalar
mode with a spec... | [
{
"created": "Tue, 17 Jul 2018 07:34:21 GMT",
"version": "v1"
}
] | 2018-08-01 | [
[
"Huang",
"Yang",
""
],
[
"Liu",
"Dao-Jun",
""
],
[
"Zhai",
"Xiang-hua",
""
],
[
"Li",
"Xin-zhou",
""
]
] | It is known that a massive charged scalar field can trigger a superradiant instability in the background of a Kerr-Newman black hole. In this paper, we present a numerical study of such an instability by using the continued fraction method. It is shown that for given a black hole, the unstable scalar mode with a specif... |
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