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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1909.02862 | Muhammad Sharif | M. Sharif and Qanitah Ama-Tul-Mughani | Greybody Factor for a Rotating Bardeen Black Hole | 18 pages, 4 figures, to appear in EPJP | Eur. Phys. J. Plus 134(2019)616 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we formulate an analytical expression of greybody factor in
the context of rotating Bardeen black hole which is valid in low energy and low
angular momentum region. Primarily, we analyze the profile of effective
potential which originates the absorption probability. We then derive two
asymptotic soluti... | [
{
"created": "Thu, 5 Sep 2019 03:44:58 GMT",
"version": "v1"
}
] | 2019-12-09 | [
[
"Sharif",
"M.",
""
],
[
"Ama-Tul-Mughani",
"Qanitah",
""
]
] | In this paper, we formulate an analytical expression of greybody factor in the context of rotating Bardeen black hole which is valid in low energy and low angular momentum region. Primarily, we analyze the profile of effective potential which originates the absorption probability. We then derive two asymptotic solution... |
1706.07657 | Ghulam Abbas | G. Abbas, M.S. Khan, Zahid Ahmad and M. Zubair | Higher Dimensional Inhomogeneous Perfect Fluid Collapse in \emph{f(R)}
Gravity | 17 Pages, to appear in European Physical Journal C | null | 10.1140/epjc/s10052-017-5003-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is about the $n+2$-dimensional gravitational contraction of
inhomogeneous fluid without heat flux in the framework of $f(R)$ metric theory
of gravity. Matching conditions for two regions of a star has been derived by
using the Darmois junction conditions. For the analytic solution of equations
of motion in... | [
{
"created": "Wed, 21 Jun 2017 05:13:56 GMT",
"version": "v1"
}
] | 2017-08-02 | [
[
"Abbas",
"G.",
""
],
[
"Khan",
"M. S.",
""
],
[
"Ahmad",
"Zahid",
""
],
[
"Zubair",
"M.",
""
]
] | This paper is about the $n+2$-dimensional gravitational contraction of inhomogeneous fluid without heat flux in the framework of $f(R)$ metric theory of gravity. Matching conditions for two regions of a star has been derived by using the Darmois junction conditions. For the analytic solution of equations of motion in m... |
0901.3926 | Francisco Lobo | Tiberiu Harko, Zolt\'an Kov\'acs, Francisco S. N. Lobo | Thin accretion disks in stationary axisymmetric wormhole spacetimes | 12 pages, 26 figures. V2: minor corrections and references added; to
appear in Physical Review D. V3: typos corrected, matches published version | Phys.Rev.D79:064001,2009 | 10.1103/PhysRevD.79.064001 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the physical properties and the equilibrium thermal
radiation emission characteristics of matter forming thin accretion disks in
stationary axially symmetric wormhole spacetimes. The thin disk models are
constructed by taking different values of the wormhole's angular velocity, and
the time av... | [
{
"created": "Sun, 25 Jan 2009 22:26:45 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Feb 2009 22:07:48 GMT",
"version": "v2"
},
{
"created": "Mon, 2 Mar 2009 21:47:06 GMT",
"version": "v3"
}
] | 2009-03-02 | [
[
"Harko",
"Tiberiu",
""
],
[
"Kovács",
"Zoltán",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | In this paper, we study the physical properties and the equilibrium thermal radiation emission characteristics of matter forming thin accretion disks in stationary axially symmetric wormhole spacetimes. The thin disk models are constructed by taking different values of the wormhole's angular velocity, and the time aver... |
2011.04120 | Ren Tsuda | Ren Tsuda, Takanori Fujiwara | Oscillating 4-Polytopal Universe in Regge Calculus | 24 pages, 9 figures. arXiv admin note: text overlap with
arXiv:1612.06536 | Prog. Theor. Exp. Phys. 2021, 083E01 | 10.1093/ptep/ptab079 | null | gr-qc hep-lat hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The discretized closed Friedmann-Lema\^itre-Robertson-Walker (FLRW) universe
with positive cosmological constant is investigated by Regge calculus.
According to the Collins-Williams formalism, a hyperspherical Cauchy surface is
replaced with regular 4-polytopes. Numerical solutions to the Regge equations
approximate ... | [
{
"created": "Mon, 9 Nov 2020 00:34:21 GMT",
"version": "v1"
},
{
"created": "Sun, 17 Oct 2021 13:33:12 GMT",
"version": "v2"
}
] | 2021-10-25 | [
[
"Tsuda",
"Ren",
""
],
[
"Fujiwara",
"Takanori",
""
]
] | The discretized closed Friedmann-Lema\^itre-Robertson-Walker (FLRW) universe with positive cosmological constant is investigated by Regge calculus. According to the Collins-Williams formalism, a hyperspherical Cauchy surface is replaced with regular 4-polytopes. Numerical solutions to the Regge equations approximate we... |
gr-qc/0703036 | Mamdouh Wanas | M.I.Wanas | On the Relation between Mass and Charge: A Pure Geometric Approach | 15 pages, LaTeX file | Int.J.Geom.Meth.Mod.Phys.4:373-388,2007 | 10.1142/S0219887807002144 | null | gr-qc | null | A new solution of the field equations of the generalized field theory,
constructed by Mikhail and Wanas in 1977, has been obtained.
The geometric structure used, in the present application, is an absolute
parallelism (AP)-space with spherical symmetry (type FIGI). The solution
obtained represents a generalized fiel... | [
{
"created": "Tue, 6 Mar 2007 13:48:43 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Wanas",
"M. I.",
""
]
] | A new solution of the field equations of the generalized field theory, constructed by Mikhail and Wanas in 1977, has been obtained. The geometric structure used, in the present application, is an absolute parallelism (AP)-space with spherical symmetry (type FIGI). The solution obtained represents a generalized field ou... |
1010.1578 | Manasse R. Mbonye | Manasse R. Mbonye, Nicholas Battista and Benjamin Farr | Time evolution of a non-singular primordial black hole | To appear in Int. J. Mod. Phys. D | null | 10.1142/S0218271812500277 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is growing notion that black holes may not contain curvature
singularities (and that indeed nature in general may abhor such spacetime
defects). This notion could have implications on our understanding of the
evolution of primordial black holes (PBHs) and possibly on their contribution
to cosmic energy. This pa... | [
{
"created": "Fri, 8 Oct 2010 01:22:07 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Mbonye",
"Manasse R.",
""
],
[
"Battista",
"Nicholas",
""
],
[
"Farr",
"Benjamin",
""
]
] | There is growing notion that black holes may not contain curvature singularities (and that indeed nature in general may abhor such spacetime defects). This notion could have implications on our understanding of the evolution of primordial black holes (PBHs) and possibly on their contribution to cosmic energy. This pape... |
1907.07490 | Yen Chin Ong | Yen Chin Ong, Yuan Yao | Charged Particle Production Rate from Cosmic Censorship in Dilaton Black
Hole Spacetimes | 13 pages, 6 figures, Fig.1 improved, typos fixed; published version | JHEP 10 (2019) 129 | 10.1007/JHEP10(2019)129 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hiscock and Weems showed that under Hawking evaporation, an isolated
asymptotically flat Reissner-Nordstrom (RN) black hole evolves in a surprising
manner: if it starts with a relatively small value of charge-to-mass ratio Q/M,
then said value will temporarily increase along its evolutionary path, before
finally decr... | [
{
"created": "Wed, 17 Jul 2019 13:11:05 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Oct 2019 12:47:11 GMT",
"version": "v2"
}
] | 2019-10-24 | [
[
"Ong",
"Yen Chin",
""
],
[
"Yao",
"Yuan",
""
]
] | Hiscock and Weems showed that under Hawking evaporation, an isolated asymptotically flat Reissner-Nordstrom (RN) black hole evolves in a surprising manner: if it starts with a relatively small value of charge-to-mass ratio Q/M, then said value will temporarily increase along its evolutionary path, before finally decrea... |
gr-qc/9207005 | null | Ted Jacobson and Joseph D. Romano | Degenerate Extensions of General Relativity | 9 pages | Class.Quant.Grav.9:L119-L124,1992 | 10.1088/0264-9381/9/9/003 | UMDGR-92-154 | gr-qc | null | General relativity has previously been extended to incorporate degenerate
metrics using Ashtekar's hamiltonian formulation of the theory. In this letter,
we show that a natural alternative choice for the form of the hamiltonian
constraints leads to a theory which agrees with GR for non-degenerate metrics,
but differs... | [
{
"created": "Thu, 23 Jul 1992 15:51:00 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Jacobson",
"Ted",
""
],
[
"Romano",
"Joseph D.",
""
]
] | General relativity has previously been extended to incorporate degenerate metrics using Ashtekar's hamiltonian formulation of the theory. In this letter, we show that a natural alternative choice for the form of the hamiltonian constraints leads to a theory which agrees with GR for non-degenerate metrics, but differs i... |
1905.06702 | Kubantai Ernazarov | K. K. Ernazarov | Stable exponential cosmological solutions with three factor spaces in
$(1+ 3 + 3 +k)$-dimensional Einstein-Gauss-Bonnet model with a $\Lambda$-term | 17 pages, Latex, no figures | null | 10.1142/S0217732319501116 | IGC-PFUR/2019/03-02 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a $(7 + k)$-dimensional Einstein-Gauss-Bonnet model with the
cosmological $\Lambda$-term. A cosmological model with three factor spaces of
dimensions $3$, $3$ and $k$, $k > 2$ is considered. Exact stable solutions with
three (non-coinciding) Hubble-like parameters in this model are obtained. Some
examples... | [
{
"created": "Thu, 16 May 2019 12:51:12 GMT",
"version": "v1"
}
] | 2019-05-22 | [
[
"Ernazarov",
"K. K.",
""
]
] | We consider a $(7 + k)$-dimensional Einstein-Gauss-Bonnet model with the cosmological $\Lambda$-term. A cosmological model with three factor spaces of dimensions $3$, $3$ and $k$, $k > 2$ is considered. Exact stable solutions with three (non-coinciding) Hubble-like parameters in this model are obtained. Some examples o... |
1209.4501 | Alexander Zhuk | Maxim Eingorn, Seyed Hossein Fakhr and Alexander Zhuk | Kaluza-Klein models with spherical compactification: observational
constraints and possible examples | 18 pages. Combined (with arXiv:1207.4339) version accepted by CQG | Class.Quant.Grav. 30 (2013) 115004 | 10.1088/0264-9381/30/11/115004 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider Kaluza-Klein models with background matter in the form of a
multicomponent perfect fluid. This matter provides spherical compactification
of the internal space with an arbitrary number of dimensions. The gravitating
source has the dust-like equation of state in the external/our space and an
arbitrary equa... | [
{
"created": "Thu, 20 Sep 2012 11:52:27 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Apr 2013 19:44:59 GMT",
"version": "v2"
}
] | 2013-05-08 | [
[
"Eingorn",
"Maxim",
""
],
[
"Fakhr",
"Seyed Hossein",
""
],
[
"Zhuk",
"Alexander",
""
]
] | We consider Kaluza-Klein models with background matter in the form of a multicomponent perfect fluid. This matter provides spherical compactification of the internal space with an arbitrary number of dimensions. The gravitating source has the dust-like equation of state in the external/our space and an arbitrary equati... |
2209.09781 | Vasilis Oikonomou | V.K. Oikonomou | Amplification of the Primordial Gravitational Waves Energy Spectrum by a
Kinetic Scalar in $F(R)$ Gravity | Astroparticle Physics in press | null | 10.1016/j.astropartphys.2022.102777 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we consider a combined theoretical framework comprised by $F(R)$
gravity and a kinetic scalar field. The kinetic energy of the scalar field
dominates over its potential for all cosmic times, and the kinetic scalar
potential is chosen to be small and non-trivial. In this case, we show that the
primordial ... | [
{
"created": "Tue, 20 Sep 2022 15:05:58 GMT",
"version": "v1"
}
] | 2022-10-12 | [
[
"Oikonomou",
"V. K.",
""
]
] | In this work we consider a combined theoretical framework comprised by $F(R)$ gravity and a kinetic scalar field. The kinetic energy of the scalar field dominates over its potential for all cosmic times, and the kinetic scalar potential is chosen to be small and non-trivial. In this case, we show that the primordial gr... |
gr-qc/9311016 | Jack Gegenberg | H. Zaidi, J. Gegenberg | Quantum Bubble Dynamics in 2+1 Dimensional Gravity I: Geometrodynamic
Approach | 14 pages, Latex (\cite typos corrected) | Phys.Lett.B328:22-27,1994 | 10.1016/0370-2693(94)90422-7 | null | gr-qc hep-th | null | The Dirac quantization of a 2+1 dimensional bubble is performed. The bubble
consists of a string forming a boundary between two regions of space-time with
distinct geometries. The ADM constraints are solved and the coupling to the
string is introduced through the boundary conditions. The wave functional is
obtained a... | [
{
"created": "Tue, 9 Nov 1993 18:49:37 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Nov 1993 13:53:58 GMT",
"version": "v2"
}
] | 2010-11-01 | [
[
"Zaidi",
"H.",
""
],
[
"Gegenberg",
"J.",
""
]
] | The Dirac quantization of a 2+1 dimensional bubble is performed. The bubble consists of a string forming a boundary between two regions of space-time with distinct geometries. The ADM constraints are solved and the coupling to the string is introduced through the boundary conditions. The wave functional is obtained and... |
1712.05149 | Soumya Chakrabarti | Soumya Chakrabarti | Collapsing spherical star in Scalar-Einstein-Gauss-Bonnet gravity with a
quadratic coupling | To Appear in EPJC | null | 10.1140/epjc/s10052-018-5798-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evolution of a self interacting scalar field in
Einstein-Gauss-Bonnet theory in four dimension where the scalar field couples
non minimally with the Gauss-Bonnet term. Considering a polynomial coupling of
the scalar field with the Gauss-Bonnet term, a self-interaction potential and
an additional perfect ... | [
{
"created": "Thu, 14 Dec 2017 10:19:15 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Apr 2018 17:36:11 GMT",
"version": "v2"
}
] | 2018-05-09 | [
[
"Chakrabarti",
"Soumya",
""
]
] | We study the evolution of a self interacting scalar field in Einstein-Gauss-Bonnet theory in four dimension where the scalar field couples non minimally with the Gauss-Bonnet term. Considering a polynomial coupling of the scalar field with the Gauss-Bonnet term, a self-interaction potential and an additional perfect fl... |
gr-qc/0304013 | Ralf Lehnert | Ralf Lehnert | Threshold analyses and Lorentz violation | 9 pages | Phys.Rev.D68:085003,2003 | 10.1103/PhysRevD.68.085003 | null | gr-qc | null | In the context of threshold investigations of Lorentz violation, we discuss
the fundamental principle of coordinate invariance, the role of an effective
dynamical framework, and the conditions of positivity and causality. Our
analysis excludes a variety of previously considered Lorentz-breaking
parameters and opens a... | [
{
"created": "Wed, 2 Apr 2003 14:52:55 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Lehnert",
"Ralf",
""
]
] | In the context of threshold investigations of Lorentz violation, we discuss the fundamental principle of coordinate invariance, the role of an effective dynamical framework, and the conditions of positivity and causality. Our analysis excludes a variety of previously considered Lorentz-breaking parameters and opens an ... |
1307.0594 | Sergey Kozyrev | Sergey N. Andrianov, Rinat A. Daishev, Sergey M. Kozyrev | Klein-Gordon equation for a particles in brane model | 8 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Brane model of universe is considered for a free particle. Conservation laws
on the brane are obtained using the symmetry properties of the brane. Equation
of motion is derived for a particle using variation principle from these
conservation laws. This equation has a form of Klein-Gordon equation.
Comparison of squar... | [
{
"created": "Tue, 2 Jul 2013 06:13:11 GMT",
"version": "v1"
}
] | 2013-07-03 | [
[
"Andrianov",
"Sergey N.",
""
],
[
"Daishev",
"Rinat A.",
""
],
[
"Kozyrev",
"Sergey M.",
""
]
] | Brane model of universe is considered for a free particle. Conservation laws on the brane are obtained using the symmetry properties of the brane. Equation of motion is derived for a particle using variation principle from these conservation laws. This equation has a form of Klein-Gordon equation. Comparison of squared... |
2204.13161 | Alberto Escalante | Alberto Escalante and J. Aldair Pantoja-Gonzalez (Puebla U., Inst.
Fis.) | Canonical analysis for Chern-Simons modification of general relativity | null | null | 10.1016/j.aop.2023.169246 | null | gr-qc math-ph math.MP | http://creativecommons.org/publicdomain/zero/1.0/ | By using the Gitman-Lyakhovich-Tyutin canonical analysis for higher-order
theories a four-dimensional Chern-Simons modification of general relativity is
analyzed. The counting of physical degrees of freedom, the symmetries, and the
fundamental Dirac brackets are reported. Additionally, we report the complete
structur... | [
{
"created": "Wed, 27 Apr 2022 19:53:53 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Oct 2022 00:50:09 GMT",
"version": "v2"
},
{
"created": "Thu, 26 Jan 2023 00:44:04 GMT",
"version": "v3"
}
] | 2023-03-22 | [
[
"Escalante",
"Alberto",
"",
"Puebla U., Inst.\n Fis."
],
[
"Pantoja-Gonzalez",
"J. Aldair",
"",
"Puebla U., Inst.\n Fis."
]
] | By using the Gitman-Lyakhovich-Tyutin canonical analysis for higher-order theories a four-dimensional Chern-Simons modification of general relativity is analyzed. The counting of physical degrees of freedom, the symmetries, and the fundamental Dirac brackets are reported. Additionally, we report the complete structure ... |
1404.3144 | Everton Murilo Carvalho Abreu | Everton M. C. Abreu and N\'elio Sasaki | Rotating traversable wormholes in a noncommutative space and the energy
conditions | 10 pages. Pre-print format. arXiv admin note: substantial text
overlap with arXiv:1207.7130 | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is a very well known fact that the energy conditions concerning
traversable wormhole (WH) solutions of Einstein equations are violated.
Consequently, attempts to avoid the violation of the energy conditions
constitutes one of the main areas of research in WH physics. On the other hand,
the current literature shows... | [
{
"created": "Wed, 9 Apr 2014 20:29:09 GMT",
"version": "v1"
}
] | 2014-04-14 | [
[
"Abreu",
"Everton M. C.",
""
],
[
"Sasaki",
"Nélio",
""
]
] | It is a very well known fact that the energy conditions concerning traversable wormhole (WH) solutions of Einstein equations are violated. Consequently, attempts to avoid the violation of the energy conditions constitutes one of the main areas of research in WH physics. On the other hand, the current literature shows u... |
gr-qc/0006015 | Garcia | L.C.Garcia de Andrade | Extended Thermodynamics to Einstein-Cartan Cosmology | Latex file | null | null | null | gr-qc | null | The thermodynamics is extented to spacetimes with spin-torsion
density.Impplications to Einstein-Cartan-de Sitter inflationary phases are
discussed.A relation between the spin-torsion density,entropy and temperature
is presented.A lower limit for the radius of the Universe may be obtained from
the spin-torsion densit... | [
{
"created": "Sun, 4 Jun 2000 01:02:18 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Andrade",
"L. C. Garcia",
""
]
] | The thermodynamics is extented to spacetimes with spin-torsion density.Impplications to Einstein-Cartan-de Sitter inflationary phases are discussed.A relation between the spin-torsion density,entropy and temperature is presented.A lower limit for the radius of the Universe may be obtained from the spin-torsion density ... |
gr-qc/0304067 | Roy Maartens | Burin Gumjudpai, Roy Maartens (Portsmouth), Christopher Gordon
(Cambridge) | Density perturbations in a brane-world universe with dark radiation | 10 pages, 4 figures | Class.Quant.Grav. 20 (2003) 3295 | 10.1088/0264-9381/20/15/302 | null | gr-qc astro-ph hep-th | null | We investigate the effects on cosmological density perturbations of dark
radiation in a Randall-Sundrum 2 type brane-world. Dark radiation in the
background is limited by observational constraints to be a small fraction of
the radiation energy density, but it has an interesting qualitative effect in
the radiation era... | [
{
"created": "Sat, 19 Apr 2003 11:23:52 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Gumjudpai",
"Burin",
"",
"Portsmouth"
],
[
"Maartens",
"Roy",
"",
"Portsmouth"
],
[
"Gordon",
"Christopher",
"",
"Cambridge"
]
] | We investigate the effects on cosmological density perturbations of dark radiation in a Randall-Sundrum 2 type brane-world. Dark radiation in the background is limited by observational constraints to be a small fraction of the radiation energy density, but it has an interesting qualitative effect in the radiation era. ... |
2111.13882 | Zhi-Chao Zhao | Zhi-Chao Zhao, Xiaolin Liu, Zhoujian Cao, and Xiaokai He | Gravitational wave memory of the binary black hole events in GWTC-2 | 10 pages, 11 figures | null | 10.1103/PhysRevD.104.064056 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Gravitational wave (GW) memory is an important prediction of general
relativity. Existing works on the GW memory detection focus on the waveform
analysis. It is hard for waveform analysis method to detect the GW memory due
to its quasi-direct current behavior and weakness. We implement a completely
different scheme i... | [
{
"created": "Sat, 27 Nov 2021 12:38:51 GMT",
"version": "v1"
}
] | 2021-11-30 | [
[
"Zhao",
"Zhi-Chao",
""
],
[
"Liu",
"Xiaolin",
""
],
[
"Cao",
"Zhoujian",
""
],
[
"He",
"Xiaokai",
""
]
] | Gravitational wave (GW) memory is an important prediction of general relativity. Existing works on the GW memory detection focus on the waveform analysis. It is hard for waveform analysis method to detect the GW memory due to its quasi-direct current behavior and weakness. We implement a completely different scheme in ... |
2005.02225 | Alexander Zhidenko | R. A. Konoplya and A. Zhidenko | 4D Einstein-Lovelock black holes: Hierarchy of orders in curvature | 8 pages, 1 ancillary Mathematica(R) notebook | Phys. Lett. B807 (2020) 135607 | 10.1016/j.physletb.2020.135607 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein-Lovelock theory contains an infinite series of corrections to
the Einstein term with an increasing power of the curvature. It is well-known
that for large black holes the lowest (Gauss-Bonnet) term is the dominant one,
while for smaller black holes higher curvature corrections become important. We
will s... | [
{
"created": "Sun, 3 May 2020 14:34:11 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Jul 2020 15:45:26 GMT",
"version": "v2"
}
] | 2020-07-13 | [
[
"Konoplya",
"R. A.",
""
],
[
"Zhidenko",
"A.",
""
]
] | The Einstein-Lovelock theory contains an infinite series of corrections to the Einstein term with an increasing power of the curvature. It is well-known that for large black holes the lowest (Gauss-Bonnet) term is the dominant one, while for smaller black holes higher curvature corrections become important. We will sho... |
2310.09464 | Emanuel Costa | Emanuel Wallison de Oliveira Costa, Raheleh Jalalzadeh, Pedro Felix da
Silva J\'unior, Seyed Meraj Mousavi Rasouli, and Shahram Jalalzadeh | Estimated Age of the Universe in Fractional Cosmology | 24 pages, 9 figures | Fractal Fract. 7 (2023) 854 | 10.3390/fractalfract7120854 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Our proposed cosmological framework, which is based on fractional quantum
cosmology, aims to address the issue of synchronicity in the age of the
universe. To achieve this, we have developed a new fractional $\Lambda$CDM
cosmological model. We obtained the necessary formalism by obtaining the
fractional Hamiltonian c... | [
{
"created": "Sat, 14 Oct 2023 01:30:15 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Nov 2023 16:58:07 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Aug 2024 18:05:01 GMT",
"version": "v3"
}
] | 2024-08-07 | [
[
"Costa",
"Emanuel Wallison de Oliveira",
""
],
[
"Jalalzadeh",
"Raheleh",
""
],
[
"Júnior",
"Pedro Felix da Silva",
""
],
[
"Rasouli",
"Seyed Meraj Mousavi",
""
],
[
"Jalalzadeh",
"Shahram",
""
]
] | Our proposed cosmological framework, which is based on fractional quantum cosmology, aims to address the issue of synchronicity in the age of the universe. To achieve this, we have developed a new fractional $\Lambda$CDM cosmological model. We obtained the necessary formalism by obtaining the fractional Hamiltonian con... |
1911.05311 | Mandar Patil | Harsha Miriam Reji, Mandar Patil | Gravitational lensing signature of matter distribution around
Schwarzschild black hole | 42 pages, 7 figures, published in PRD | Phys. Rev. D 101, 064051 (2020) | 10.1103/PhysRevD.101.064051 | null | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we focus on the situation where a significant amount of matter
could be located close to the event horizon of the central black hole and how
it affects the gravitational lensing signal. We consider a simple toy model
where the matter is concentrated in the rather small region between the inner
photon sp... | [
{
"created": "Wed, 13 Nov 2019 06:11:00 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Nov 2019 05:01:39 GMT",
"version": "v2"
},
{
"created": "Wed, 26 Feb 2020 09:06:45 GMT",
"version": "v3"
},
{
"created": "Mon, 27 Apr 2020 15:21:43 GMT",
"version": "v4"
}
] | 2020-04-28 | [
[
"Reji",
"Harsha Miriam",
""
],
[
"Patil",
"Mandar",
""
]
] | In this work, we focus on the situation where a significant amount of matter could be located close to the event horizon of the central black hole and how it affects the gravitational lensing signal. We consider a simple toy model where the matter is concentrated in the rather small region between the inner photon sphe... |
2006.10614 | Gabriele Barca | Eleonora Giovannetti, Gabriele Barca, Federico Mandini, Giovanni
Montani | Polymer dynamics of isotropic universe in Ashtekar and in volume
variables | 16 pages, 6 figures | null | 10.3390/universe8060302 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We analyze the semiclassical and quantum polymer dynamics of the isotropic
Universe in terms of both the standard Ashtekar-Barbero-Immirzi connection and
its conjugate momentum and also of the new generalized coordinate conjugate to
the Universe volume. We study the properties of the resulting bouncing
cosmology that... | [
{
"created": "Thu, 18 Jun 2020 15:35:20 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Aug 2020 12:16:10 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Mar 2021 13:03:01 GMT",
"version": "v3"
},
{
"created": "Tue, 22 Jun 2021 13:14:11 GMT",
"version": "v4"
},
{
"c... | 2022-06-01 | [
[
"Giovannetti",
"Eleonora",
""
],
[
"Barca",
"Gabriele",
""
],
[
"Mandini",
"Federico",
""
],
[
"Montani",
"Giovanni",
""
]
] | We analyze the semiclassical and quantum polymer dynamics of the isotropic Universe in terms of both the standard Ashtekar-Barbero-Immirzi connection and its conjugate momentum and also of the new generalized coordinate conjugate to the Universe volume. We study the properties of the resulting bouncing cosmology that e... |
gr-qc/0504087 | Elizabeth Winstanley | Anne-Marie Barlow, Daniel Doherty and Elizabeth Winstanley | Thermodynamics of de Sitter black holes with a conformally coupled
scalar field | 9 pages, 2 figures, REVTEX. Minor changes, accepted for publication
in Phys. Rev. D | Phys.Rev.D72:024008,2005 | 10.1103/PhysRevD.72.024008 | null | gr-qc hep-th | null | We study the thermodynamics of de Sitter black holes with a conformally
coupled scalar field. The geometry is that of the ``lukewarm''
Reissner-Nordstrom-de Sitter black holes, with the event and cosmological
horizons at the same temperature. This means that the region between the event
and cosmological horizons can ... | [
{
"created": "Tue, 19 Apr 2005 18:31:41 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Jun 2005 09:43:36 GMT",
"version": "v2"
}
] | 2011-07-19 | [
[
"Barlow",
"Anne-Marie",
""
],
[
"Doherty",
"Daniel",
""
],
[
"Winstanley",
"Elizabeth",
""
]
] | We study the thermodynamics of de Sitter black holes with a conformally coupled scalar field. The geometry is that of the ``lukewarm'' Reissner-Nordstrom-de Sitter black holes, with the event and cosmological horizons at the same temperature. This means that the region between the event and cosmological horizons can fo... |
2302.03846 | Xi-Long Fan | Yang Jiang, Xi-Long Fan and Qing-Guo Huang | Search for stochastic gravitational-wave background from string
cosmology with Advanced LIGO and Virgo's O1$\sim$O3 data | Accepted by Journal of Cosmology and Astroparticle Physics | null | 10.1088/1475-7516/2023/04/024 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | String cosmology models predict a relic background of gravitational-wave (GW)
radiation in the early universe. The GW energy spectrum of radiated power
increases rapidly with the frequency, and therefore it becomes a potential and
meaningful observation object for high-frequency GW detector. We focus on the
stochasti... | [
{
"created": "Wed, 8 Feb 2023 02:41:31 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Apr 2023 05:39:34 GMT",
"version": "v2"
}
] | 2023-04-19 | [
[
"Jiang",
"Yang",
""
],
[
"Fan",
"Xi-Long",
""
],
[
"Huang",
"Qing-Guo",
""
]
] | String cosmology models predict a relic background of gravitational-wave (GW) radiation in the early universe. The GW energy spectrum of radiated power increases rapidly with the frequency, and therefore it becomes a potential and meaningful observation object for high-frequency GW detector. We focus on the stochastic ... |
gr-qc/0605041 | James Lindesay | James Lindesay | Thermal Evolution of a Dual Scale Cosmology | 8 pages | null | null | null | gr-qc | null | Previous work developed a space-time metric with two cosmological scales; one
that conveniently describes the classical evolution of the dynamics, and the
other describing a scale associated with macroscopic quantum aspects like
vacuum energy. The present work expands upon the dynamics of these scales to
demonstrate ... | [
{
"created": "Sun, 7 May 2006 20:33:41 GMT",
"version": "v1"
},
{
"created": "Tue, 9 May 2006 02:31:30 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Lindesay",
"James",
""
]
] | Previous work developed a space-time metric with two cosmological scales; one that conveniently describes the classical evolution of the dynamics, and the other describing a scale associated with macroscopic quantum aspects like vacuum energy. The present work expands upon the dynamics of these scales to demonstrate th... |
2408.00832 | James Alvey | James Alvey, Uddipta Bhardwaj, Valerie Domcke, Mauro Pieroni and
Christoph Weniger | Leveraging Time-Dependent Instrumental Noise for LISA SGWB Analysis | 12 pages, 5 figures. saqqara available at
https://github.com/peregrine-gw/saqqara, GW_response available at
https://github.com/Mauropieroni/GW_response | null | null | CERN-TH-2024-127 | gr-qc astro-ph.CO astro-ph.IM hep-ph | http://creativecommons.org/licenses/by/4.0/ | Variations in the instrumental noise of the Laser Interferometer Space
Antenna (LISA) over time are expected as a result of e.g. scheduled satellite
operations or unscheduled glitches. We demonstrate that these fluctuations can
be leveraged to improve the sensitivity to stochastic gravitational wave
backgrounds (SGWB... | [
{
"created": "Thu, 1 Aug 2024 18:00:01 GMT",
"version": "v1"
}
] | 2024-08-05 | [
[
"Alvey",
"James",
""
],
[
"Bhardwaj",
"Uddipta",
""
],
[
"Domcke",
"Valerie",
""
],
[
"Pieroni",
"Mauro",
""
],
[
"Weniger",
"Christoph",
""
]
] | Variations in the instrumental noise of the Laser Interferometer Space Antenna (LISA) over time are expected as a result of e.g. scheduled satellite operations or unscheduled glitches. We demonstrate that these fluctuations can be leveraged to improve the sensitivity to stochastic gravitational wave backgrounds (SGWBs)... |
1109.5837 | Naiereh Elyasi | Naiereh Elyasi and Nasser Boroojerdian | Application of Lie algebroid structures to unification of Einstein and
yang-mills field equations | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Yang-mills field equations describe new forces in the context of Lie groups
and principle bundles. It is of interest to know if the new forces and
gravitation can be described in the context of algebroids. This work was
intended as an attempt to answer last question. The basic idea is to construct
Einstein field equa... | [
{
"created": "Tue, 27 Sep 2011 11:10:42 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Oct 2011 07:00:04 GMT",
"version": "v2"
}
] | 2011-10-05 | [
[
"Elyasi",
"Naiereh",
""
],
[
"Boroojerdian",
"Nasser",
""
]
] | Yang-mills field equations describe new forces in the context of Lie groups and principle bundles. It is of interest to know if the new forces and gravitation can be described in the context of algebroids. This work was intended as an attempt to answer last question. The basic idea is to construct Einstein field equati... |
1208.3731 | Valerio Faraoni | Valerio Faraoni and Andres F. Zambrano Moreno (Bishop's University) | Interpreting the conformal cousin of the Husain-Martinez-Nunez solution | 7 pages, 2 figures. Removed a subsection which referred to an empty
subclass of solutions, added discussion, a special (static) case, and
references | null | 10.1103/PhysRevD.86.084044 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A 2-parameter inhomogeneous cosmology in Brans-Dicke theory, obtained by
conformally transforming the Husain-Martinez-Nunez (HMN) scalar field solution
of the Einstein equations is studied and interpreted physically. According to
the values of the parameters it describes a wormhole, a naked singularity, or
else a spa... | [
{
"created": "Sat, 18 Aug 2012 08:49:48 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Oct 2012 22:51:47 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Faraoni",
"Valerio",
"",
"Bishop's University"
],
[
"Moreno",
"Andres F. Zambrano",
"",
"Bishop's University"
]
] | A 2-parameter inhomogeneous cosmology in Brans-Dicke theory, obtained by conformally transforming the Husain-Martinez-Nunez (HMN) scalar field solution of the Einstein equations is studied and interpreted physically. According to the values of the parameters it describes a wormhole, a naked singularity, or else a space... |
1305.5512 | Farkhat Zaripov Shaukatovich | Farkhat Zaripov | Modified equations in the theory of induced gravity. Solution to the
cosmological constant problem | 21 pages, 13 Postscript figures | Astrophysics and Space Science : Volume 352, Issue 1 (2014), Page
289-305 | 10.1007/s10509-014-1909-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This research is an extension of the author's article \cite{zar}, in which
conformally invariant generalization of string theory was suggested to
higher-dimensional objects. Special cases of the proposed theory are Einstein's
theory of gravity and string theory. This work is devoted to the formation of
self-consisten... | [
{
"created": "Thu, 23 May 2013 18:36:58 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Oct 2014 15:30:00 GMT",
"version": "v2"
}
] | 2014-10-13 | [
[
"Zaripov",
"Farkhat",
""
]
] | This research is an extension of the author's article \cite{zar}, in which conformally invariant generalization of string theory was suggested to higher-dimensional objects. Special cases of the proposed theory are Einstein's theory of gravity and string theory. This work is devoted to the formation of self-consistent ... |
2401.09818 | Lang Liu | Zu-Cheng Chen, Jun Li, Lang Liu and Zhu Yi | Probing the speed of scalar-induced gravitational waves with pulsar
timing arrays | 8 pages, 2 figures | Phys. Rev. D 109, L101302 (2024) | 10.1103/PhysRevD.109.L101302 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, several regional pulsar timing array collaborations, including
CPTA, EPTA, PPTA, and NANOGrav, have individually reported compelling evidence
for a stochastic signal at nanohertz frequencies. This signal originates
potentially from scalar-induced gravitational waves associated with significant
primordial cu... | [
{
"created": "Thu, 18 Jan 2024 09:19:53 GMT",
"version": "v1"
},
{
"created": "Fri, 10 May 2024 15:14:41 GMT",
"version": "v2"
}
] | 2024-05-13 | [
[
"Chen",
"Zu-Cheng",
""
],
[
"Li",
"Jun",
""
],
[
"Liu",
"Lang",
""
],
[
"Yi",
"Zhu",
""
]
] | Recently, several regional pulsar timing array collaborations, including CPTA, EPTA, PPTA, and NANOGrav, have individually reported compelling evidence for a stochastic signal at nanohertz frequencies. This signal originates potentially from scalar-induced gravitational waves associated with significant primordial curv... |
gr-qc/9404010 | Lee Smolin | Lee Smolin | Fermions and Topology | LATEX, 17 pages, no figures, CGPG-93/9-4 | null | null | null | gr-qc | null | The canonical theory of quantum gravity in the loop representation can be
extended to incorporate topology change, in the simple case that this refers to
the creation or annihilation of "minimalist wormholes" in which two points of
the spatial manifold are identified. Furthermore, if the states of the
wormholes threa... | [
{
"created": "Thu, 7 Apr 1994 22:23:40 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Smolin",
"Lee",
""
]
] | The canonical theory of quantum gravity in the loop representation can be extended to incorporate topology change, in the simple case that this refers to the creation or annihilation of "minimalist wormholes" in which two points of the spatial manifold are identified. Furthermore, if the states of the wormholes threade... |
2011.06792 | Jun-Qi Guo | Jun-Qi Guo, Lin Zhang, Yuewen Chen, Pankaj S. Joshi, Hongsheng Zhang | Strength of the naked singularity in critical collapse | 5 pages, 3 figures | Eur. Phys. J. C 80, 924 (2020) | 10.1140/epjc/s10052-020-08486-7 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The critical collapse of a scalar field is a threshold solution of black hole
formation, in which a naked singularity arises. We study here the curvature
strength of this singularity using a numerical ansatz. The behavior of the
Jacobi volume forms is examined along a non-spacelike geodesic in the limit of
approach t... | [
{
"created": "Fri, 13 Nov 2020 07:17:02 GMT",
"version": "v1"
}
] | 2020-11-16 | [
[
"Guo",
"Jun-Qi",
""
],
[
"Zhang",
"Lin",
""
],
[
"Chen",
"Yuewen",
""
],
[
"Joshi",
"Pankaj S.",
""
],
[
"Zhang",
"Hongsheng",
""
]
] | The critical collapse of a scalar field is a threshold solution of black hole formation, in which a naked singularity arises. We study here the curvature strength of this singularity using a numerical ansatz. The behavior of the Jacobi volume forms is examined along a non-spacelike geodesic in the limit of approach to ... |
0807.4874 | Martin Bojowald | Martin Bojowald | Canonical Relativity and the Dimensionality of the World | 17 pages, 2 figures; Chapter in: Relativity and the Dimensionality of
the World, Ed. V. Petkov (Springer, 2007), pp. 137-152 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Different aspects of relativity, mainly in a canonical formulation, relevant
for the question "Is spacetime nothing more than a mathematical space (which
describes the evolution in time of the ordinary three-dimensional world) or is
it a mathematical model of a real four-dimensional world with time entirely
given as ... | [
{
"created": "Wed, 30 Jul 2008 14:44:19 GMT",
"version": "v1"
}
] | 2008-07-31 | [
[
"Bojowald",
"Martin",
""
]
] | Different aspects of relativity, mainly in a canonical formulation, relevant for the question "Is spacetime nothing more than a mathematical space (which describes the evolution in time of the ordinary three-dimensional world) or is it a mathematical model of a real four-dimensional world with time entirely given as th... |
1902.06748 | Nuno M. Santos | Carlos A. R. Herdeiro, Nuno M. Santos | Exotic compact object behavior in black hole analogues | 12 pages, 6 figures. Accepted for publication as a Regular Article in
Physical Review D | Phys. Rev. D 99, 084029 (2019) | 10.1103/PhysRevD.99.084029 | null | gr-qc astro-ph.HE hep-ph hep-th physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Classical phenomenological aspects of acoustic perturbations on a draining
bathtub geometry where a surface with reflectivity $\mathcal{R}$ is set at a
small distance from the would-be acoustic horizon, which is excised, are
addressed. Like most exotic compact objects featuring an ergoregion but not a
horizon, this m... | [
{
"created": "Mon, 18 Feb 2019 19:00:01 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Apr 2019 21:42:09 GMT",
"version": "v2"
}
] | 2019-04-17 | [
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Santos",
"Nuno M.",
""
]
] | Classical phenomenological aspects of acoustic perturbations on a draining bathtub geometry where a surface with reflectivity $\mathcal{R}$ is set at a small distance from the would-be acoustic horizon, which is excised, are addressed. Like most exotic compact objects featuring an ergoregion but not a horizon, this mod... |
gr-qc/0011088 | Victor K. Shchigolev | V.K.Shchigolev, M.V.Shchigolev | Cosmological Models with Nonlinearity of Scalar Field Induced by
Yang-Mills Field | 9 pages, LaTeX | Grav.Cosmol. 7 (2001) 219-222 | null | null | gr-qc | null | The exact solutions of Einstein - Yang - Mills and interacting with SO (3) -
Yang-Mills field nonlinear scalar field equations in a class of spatially
homogeneous cosmological Friedmann models are obtained.
| [
{
"created": "Fri, 24 Nov 2000 14:58:31 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Shchigolev",
"V. K.",
""
],
[
"Shchigolev",
"M. V.",
""
]
] | The exact solutions of Einstein - Yang - Mills and interacting with SO (3) - Yang-Mills field nonlinear scalar field equations in a class of spatially homogeneous cosmological Friedmann models are obtained. |
1801.07195 | Alexander Zhidenko | R. A. Konoplya, Z. Stuchl\'ik, A. Zhidenko | Axisymmetric black holes allowing for separation of variables in the
Klein-Gordon and Hamilton-Jacobi equation | 14 pages | Phys. Rev. D 97, 084044 (2018) | 10.1103/PhysRevD.97.084044 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We determine the class of axisymmetric and asymptotically flat black-hole
spacetimes for which the test Klein-Gordon and Hamilton-Jacobi equations allow
for the separation of variables. The known Kerr, Kerr-Newman, Kerr-Sen and some
other black-hole metrics in various theories of gravity are within the class of
space... | [
{
"created": "Mon, 22 Jan 2018 17:05:34 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jan 2018 20:54:30 GMT",
"version": "v2"
},
{
"created": "Mon, 16 Apr 2018 23:59:07 GMT",
"version": "v3"
}
] | 2018-04-27 | [
[
"Konoplya",
"R. A.",
""
],
[
"Stuchlík",
"Z.",
""
],
[
"Zhidenko",
"A.",
""
]
] | We determine the class of axisymmetric and asymptotically flat black-hole spacetimes for which the test Klein-Gordon and Hamilton-Jacobi equations allow for the separation of variables. The known Kerr, Kerr-Newman, Kerr-Sen and some other black-hole metrics in various theories of gravity are within the class of spaceti... |
2210.02669 | Tomohiro Ishikawa | Tomohiro Ishikawa, Shoki Iwaguchi, Bin Wu, Izumi Watanabe, Yuki
Kawasaki, Ryuma Shimizu, Yutaro Enomoto, Yuta Michimura, Akira Furusawa,
Seiji Kawamura | Can the phase of radiation pressure fluctuations be flipped in a single
path for laser interferometric gravitational wave detectors? | 14 pages, 8 figures | null | 10.1016/j.physleta.2022.128485 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Radiation pressure (RP) noise, one component of quantum noise, can limit the
sensitivity of laser interferometric gravitational wave (GW) detectors at lower
frequencies. We conceived a possible RP noise cancellation method, using phase
flipped ponderomotive-squeezed light (FPSL) incident on free-mass mirrors in
inter... | [
{
"created": "Thu, 6 Oct 2022 04:17:06 GMT",
"version": "v1"
}
] | 2022-10-19 | [
[
"Ishikawa",
"Tomohiro",
""
],
[
"Iwaguchi",
"Shoki",
""
],
[
"Wu",
"Bin",
""
],
[
"Watanabe",
"Izumi",
""
],
[
"Kawasaki",
"Yuki",
""
],
[
"Shimizu",
"Ryuma",
""
],
[
"Enomoto",
"Yutaro",
""
],
[
"M... | Radiation pressure (RP) noise, one component of quantum noise, can limit the sensitivity of laser interferometric gravitational wave (GW) detectors at lower frequencies. We conceived a possible RP noise cancellation method, using phase flipped ponderomotive-squeezed light (FPSL) incident on free-mass mirrors in interfe... |
1604.06217 | Pavel Bushev | Pavel Bushev, Jared H. Cole, Dmitry Sholokhov, Nadezhda Kukharchyk and
Magdalena Zych | Single electron relativistic clock interferometer | 9 pages, 4 figures | New J. Phys. 18, 093050 (2016) | 10.1088/1367-2630/18/9/093050 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Although time is one of the fundamental notions in physics, it does not have
a unique description. In quantum theory time is a parameter ordering the
succession of the probability amplitudes of a quantum system, while according
to relativity theory each system experiences in general a different proper
time, depending... | [
{
"created": "Thu, 21 Apr 2016 08:58:14 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Oct 2016 17:20:55 GMT",
"version": "v2"
}
] | 2016-10-04 | [
[
"Bushev",
"Pavel",
""
],
[
"Cole",
"Jared H.",
""
],
[
"Sholokhov",
"Dmitry",
""
],
[
"Kukharchyk",
"Nadezhda",
""
],
[
"Zych",
"Magdalena",
""
]
] | Although time is one of the fundamental notions in physics, it does not have a unique description. In quantum theory time is a parameter ordering the succession of the probability amplitudes of a quantum system, while according to relativity theory each system experiences in general a different proper time, depending o... |
1310.7632 | Roberto A. Sussman | Roberto A Sussman and Julien Larena | Gravitational entropies in LTB dust models | Version accepted for publication in Classical and Quantum Gravity. 39
pages, 6 figures | Classical and Quantum Gravity, vol 31, page 075021, (2014) | 10.1088/0264-9381/31/7/075021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider generic Lemaitre-Tolman-Bondi (LTB) dust models to probe the
gravitational entropy proposals of Clifton, Ellis and Tavakol (CET) and of
Hosoya and Buchert (HB). We also consider a variant of the HB proposal based on
a suitable quasi-local scalar weighted average. We show that the conditions for
entropy gr... | [
{
"created": "Mon, 28 Oct 2013 21:53:28 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Mar 2014 04:51:15 GMT",
"version": "v2"
}
] | 2015-06-17 | [
[
"Sussman",
"Roberto A",
""
],
[
"Larena",
"Julien",
""
]
] | We consider generic Lemaitre-Tolman-Bondi (LTB) dust models to probe the gravitational entropy proposals of Clifton, Ellis and Tavakol (CET) and of Hosoya and Buchert (HB). We also consider a variant of the HB proposal based on a suitable quasi-local scalar weighted average. We show that the conditions for entropy grow... |
gr-qc/9307020 | David Garfinkle | David Garfinkle and G. Comer Duncan | Collapse of a Circular Loop of Cosmic String | 15 pages | Phys.Rev. D49 (1994) 2752-2758 | 10.1103/PhysRevD.49.2752 | null | gr-qc | null | We study the collapse of a circular loop of cosmic string. The gravitational
field of the string is treated using the weak field approximation. The
gravitational radiation from the loop is evaluated numerically. The memtric of
the loop near the point of collapse is found analytically.
| [
{
"created": "Wed, 14 Jul 1993 23:23:55 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Garfinkle",
"David",
""
],
[
"Duncan",
"G. Comer",
""
]
] | We study the collapse of a circular loop of cosmic string. The gravitational field of the string is treated using the weak field approximation. The gravitational radiation from the loop is evaluated numerically. The memtric of the loop near the point of collapse is found analytically. |
2206.15145 | Yi Zhong | Yi Zhong, Ke Yang, and Yu-Xiao Liu | Thick brane in Rastall gravity | 13 pages, 7 figures | JHEP 09 (2022) 128 | 10.1007/JHEP09(2022)128 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | In this work, thick branes in Rastall gravity are investigated. Three types
of maximally symmetric thick brane models are constructed and the linear tensor
perturbation is analyzed. In the flat brane model, the tensor modes of the
perturbation are either unstable or nonlocalizable for a nonvanishing Rastall
parameter... | [
{
"created": "Thu, 30 Jun 2022 09:26:37 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Jul 2022 05:11:11 GMT",
"version": "v2"
}
] | 2022-09-27 | [
[
"Zhong",
"Yi",
""
],
[
"Yang",
"Ke",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | In this work, thick branes in Rastall gravity are investigated. Three types of maximally symmetric thick brane models are constructed and the linear tensor perturbation is analyzed. In the flat brane model, the tensor modes of the perturbation are either unstable or nonlocalizable for a nonvanishing Rastall parameter. ... |
2106.00392 | Suvodip Mukherjee | Suvodip Mukherjee, Tom Broadhurst, Jose M. Diego, Joseph Silk, George
F. Smoot | Impact of astrophysical binary coalescence timescales on the rate of
lensed gravitational wave events | 10 pages, 6 figures. Accepted for publication in MNRAS | null | 10.1093/mnras/stab1980 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The expected event rate of lensed gravitational wave sources scales with the
merger rate at redshift $z\geq 1$, where the optical depth for lensing is high.
It is commonly assumed that the merger rate of the astrophysical compact
objects is closely connected with the star formation rate, which peaks around
redshift $... | [
{
"created": "Tue, 1 Jun 2021 11:02:09 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Jul 2021 11:51:00 GMT",
"version": "v2"
}
] | 2021-07-21 | [
[
"Mukherjee",
"Suvodip",
""
],
[
"Broadhurst",
"Tom",
""
],
[
"Diego",
"Jose M.",
""
],
[
"Silk",
"Joseph",
""
],
[
"Smoot",
"George F.",
""
]
] | The expected event rate of lensed gravitational wave sources scales with the merger rate at redshift $z\geq 1$, where the optical depth for lensing is high. It is commonly assumed that the merger rate of the astrophysical compact objects is closely connected with the star formation rate, which peaks around redshift $z\... |
2205.14742 | Maria Babiuc | Dillon Buskirk and Maria C. Babiuc Hamilton | Merging Black Holes: Assessing the Performance of Two Analytic
Gravitational Waves Models | 28 pages, 8 figures | Journal of Cosmology and Astroparticle Physics (2023) 005 | 10.1088/1475-7516/2023/03/005 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Merging black holes produce the loudest signal in the detectors. However,
this is the most difficult signal to accurately predict with analytical
techniques. Only computer simulations can account for the nonlinear physics
during the collision, but they are inherently complex, costly, and affected by
numerical errors.... | [
{
"created": "Sun, 29 May 2022 19:29:52 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Sep 2022 14:37:13 GMT",
"version": "v2"
},
{
"created": "Thu, 22 Dec 2022 21:01:32 GMT",
"version": "v3"
},
{
"created": "Wed, 1 Mar 2023 22:20:29 GMT",
"version": "v4"
}
] | 2023-03-08 | [
[
"Buskirk",
"Dillon",
""
],
[
"Hamilton",
"Maria C. Babiuc",
""
]
] | Merging black holes produce the loudest signal in the detectors. However, this is the most difficult signal to accurately predict with analytical techniques. Only computer simulations can account for the nonlinear physics during the collision, but they are inherently complex, costly, and affected by numerical errors. I... |
gr-qc/0407051 | Jerzy Lewandowski | Marcin Domagala and Jerzy Lewandowski (Uniwersytet Warszawski) | Black hole entropy from Quantum Geometry | a new section ``The spin probability distribution'' added | Class.Quant.Grav. 21 (2004) 5233-5244 | 10.1088/0264-9381/21/22/014 | null | gr-qc hep-th | null | Quantum Geometry (the modern Loop Quantum Gravity using graphs and
spin-networks instead of the loops) provides microscopic degrees of freedom
that account for the black-hole entropy. However, the procedure for state
counting used in the literature contains an error and the number of the
relevant horizon states is un... | [
{
"created": "Wed, 14 Jul 2004 18:52:16 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Aug 2004 08:08:23 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Domagala",
"Marcin",
"",
"Uniwersytet Warszawski"
],
[
"Lewandowski",
"Jerzy",
"",
"Uniwersytet Warszawski"
]
] | Quantum Geometry (the modern Loop Quantum Gravity using graphs and spin-networks instead of the loops) provides microscopic degrees of freedom that account for the black-hole entropy. However, the procedure for state counting used in the literature contains an error and the number of the relevant horizon states is unde... |
gr-qc/0506137 | Herbert Hamber | Herbert W. Hamber and Ruth M. Williams | Nonlocal Effective Field Equations for Quantum Cosmology | 9 pages | Mod.Phys.Lett. A21 (2006) 735-742 | 10.1142/S0217732306019979 | DAMTP-2005-58 | gr-qc | null | The possibility that the strength of gravitational interactions might slowly
increase with distance, is explored by formulating a set of effective field
equations, which incorporate the gravitational, vacuum-polarization induced,
running of Newton's constant $G$. The resulting long distance (or large time)
behaviour ... | [
{
"created": "Wed, 29 Jun 2005 18:33:36 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Hamber",
"Herbert W.",
""
],
[
"Williams",
"Ruth M.",
""
]
] | The possibility that the strength of gravitational interactions might slowly increase with distance, is explored by formulating a set of effective field equations, which incorporate the gravitational, vacuum-polarization induced, running of Newton's constant $G$. The resulting long distance (or large time) behaviour de... |
2302.08900 | Marco Brito MSc | Marco Brito, Carlos Herdeiro, Eugen Radu, Nicolas Sanchis-Gual and
Miguel Zilh\~ao | Stability and physical properties of spherical excited scalar boson
stars | 16 pages, 16 figures, updated with an appendix to match published
version | Phys. Rev. D 107, 084022 (2023) | 10.1103/PhysRevD.107.084022 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the time evolution of spherical, excited -- with $n$ radial nodes --
scalar boson stars in General Relativity minimally coupled to a complex massive
scalar field with quartic self-interactions. We report that these stars, with
up to $n=10$, can be made dynamically stable, up to timescales of
$t\sim\frac{10^{... | [
{
"created": "Fri, 17 Feb 2023 14:28:36 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Apr 2023 13:47:19 GMT",
"version": "v2"
}
] | 2023-04-17 | [
[
"Brito",
"Marco",
""
],
[
"Herdeiro",
"Carlos",
""
],
[
"Radu",
"Eugen",
""
],
[
"Sanchis-Gual",
"Nicolas",
""
],
[
"Zilhão",
"Miguel",
""
]
] | We study the time evolution of spherical, excited -- with $n$ radial nodes -- scalar boson stars in General Relativity minimally coupled to a complex massive scalar field with quartic self-interactions. We report that these stars, with up to $n=10$, can be made dynamically stable, up to timescales of $t\sim\frac{10^{4}... |
1902.09531 | Wenbin Lin | Bo Yang and Chunhua Jiang and Wenbin Lin | Post-Minkowskian solution for the small-deflection motion of test
particles in Kerr-Newman spacetime | Submitted to Class. Quantum Grav | null | 10.1088/1361-6382/ab0ec9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the second-order post-Minkowskian solution for the small-deflection
motion of test particles in the external field of the Kerr-Newman black hole
via an iterative method. The analytical results are exhibited in the coordinate
system constituted by the particles' initial velocity unit vector, impact
vector, a... | [
{
"created": "Sun, 24 Feb 2019 14:02:43 GMT",
"version": "v1"
}
] | 2019-05-22 | [
[
"Yang",
"Bo",
""
],
[
"Jiang",
"Chunhua",
""
],
[
"Lin",
"Wenbin",
""
]
] | We derive the second-order post-Minkowskian solution for the small-deflection motion of test particles in the external field of the Kerr-Newman black hole via an iterative method. The analytical results are exhibited in the coordinate system constituted by the particles' initial velocity unit vector, impact vector, and... |
gr-qc/9709044 | Carlo Baccigalupi | Carlo Baccigalupi, Luca Amendola, Pierluigi Fortini, Franco Occhionero | Stochastic gravitational background from inflationary phase transitions | 12 pages, 3 figures. Phys.Rev.D in press | Phys.Rev.D56:4610-4617,1997 | 10.1103/PhysRevD.56.4610 | null | gr-qc | null | We consider true vacuum bubbles generated in a first order phase transition
occurring during the slow rolling era of a two field inflation: it is known
that gravitational waves are produced by the collision of such bubbles. We find
that the epoch of the phase transition strongly affects the characteristic peak
freque... | [
{
"created": "Tue, 16 Sep 1997 15:17:07 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Baccigalupi",
"Carlo",
""
],
[
"Amendola",
"Luca",
""
],
[
"Fortini",
"Pierluigi",
""
],
[
"Occhionero",
"Franco",
""
]
] | We consider true vacuum bubbles generated in a first order phase transition occurring during the slow rolling era of a two field inflation: it is known that gravitational waves are produced by the collision of such bubbles. We find that the epoch of the phase transition strongly affects the characteristic peak frequenc... |
gr-qc/0312109 | Masato Minamitsuji | Masato Minamitsuji and Misao Sasaki | Local conservation law and dark radiation in cosmological braneworld | 21 pages, discussions on naked singularity formation and references
added | Phys.Rev.D70:044021,2004 | 10.1103/PhysRevD.70.044021 | YITP-03-81 | gr-qc astro-ph hep-th | null | In the context of the Randall-Sundrum (RS) single-brane scenario, we discuss
the bulk geometry and dynamics of a cosmological brane in terms of the local
energy conservation law which exists for the bulk that allows slicing with a
maximally symmetric 3-space. This conservation law enables us to define a local
mass in... | [
{
"created": "Thu, 25 Dec 2003 05:05:32 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Jan 2004 11:25:29 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Jan 2004 09:24:50 GMT",
"version": "v3"
}
] | 2009-10-09 | [
[
"Minamitsuji",
"Masato",
""
],
[
"Sasaki",
"Misao",
""
]
] | In the context of the Randall-Sundrum (RS) single-brane scenario, we discuss the bulk geometry and dynamics of a cosmological brane in terms of the local energy conservation law which exists for the bulk that allows slicing with a maximally symmetric 3-space. This conservation law enables us to define a local mass in t... |
gr-qc/0409022 | Spiros Cotsakis | Spiros Cotsakis and Ifigeneia Klaoudatou | Future Singularities of Isotropic Cosmologies | v2: 16 pages, references added, clarrifications throughout, version
to appear in the J.Geom.Phys | J.Geom.Phys. 55 (2005) 306-315 | 10.1016/j.geomphys.2004.12.012 | null | gr-qc | null | We show that globally and regularly hyperbolic future geodesically incomplete
isotropic universes, except for the standard all-encompassing `big crunch', can
accommodate singularities of only one kind, namely, those having a
non-integrable Hubble parameter, $H$. We analyze several examples from recent
literature whic... | [
{
"created": "Sun, 5 Sep 2004 17:52:00 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Dec 2004 09:59:16 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Cotsakis",
"Spiros",
""
],
[
"Klaoudatou",
"Ifigeneia",
""
]
] | We show that globally and regularly hyperbolic future geodesically incomplete isotropic universes, except for the standard all-encompassing `big crunch', can accommodate singularities of only one kind, namely, those having a non-integrable Hubble parameter, $H$. We analyze several examples from recent literature which ... |
1511.03655 | Abdul Jawad | Abdul Jawad, Davood Momeni, Shamaila Rani and Ratbay Myrzakulov | Dynamical Instability of Cylindrically Symmetric Collapsing Star in
Generalized Teleparallel Gravity | 20 pages; Accepted for publication in Astrophysics and Space Sceince | Astrophys. Space Sci. 361 (2016) | 10.1007/s10509-016-2721-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to analyze the dynamical instability of a
self-gravitating object undergoes to collapse process. We take the framework of
generalized teleparallel gravity with cylindrically symmetric gravitating
object. The matter distribution is represented by locally anisotropic
energy-momentum tensor. We dev... | [
{
"created": "Wed, 11 Nov 2015 11:00:16 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Mar 2016 09:46:46 GMT",
"version": "v2"
}
] | 2016-10-31 | [
[
"Jawad",
"Abdul",
""
],
[
"Momeni",
"Davood",
""
],
[
"Rani",
"Shamaila",
""
],
[
"Myrzakulov",
"Ratbay",
""
]
] | This paper is devoted to analyze the dynamical instability of a self-gravitating object undergoes to collapse process. We take the framework of generalized teleparallel gravity with cylindrically symmetric gravitating object. The matter distribution is represented by locally anisotropic energy-momentum tensor. We devel... |
1501.07161 | Ayan Banerjee | Piyali Bhar and Ayan Banerjee | Stability of Thin-Shell Wormholes from Noncommutative BTZ Black Hole | 13 pages, 16 figures, accepted in Int.J.Mod.Phys. D. arXiv admin
note: text overlap with arXiv:0806.4459, arXiv:0909.1071 by other authors | International Journal of Modern Physics D, Vol. 24, No. 5 (2015)
1550034 | 10.1142/S0218271815500340 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we construct thin-shell wormholes in (2+1)-dimensions from
noncommutative BTZ black hole by applying the cut-and-paste procedure
implemented by Visser. We calculate the surface stresses localized at the
wormhole throat by using the Darmois-Israel formalism, and we find that the
wormholes are supported ... | [
{
"created": "Tue, 27 Jan 2015 18:02:39 GMT",
"version": "v1"
}
] | 2016-10-31 | [
[
"Bhar",
"Piyali",
""
],
[
"Banerjee",
"Ayan",
""
]
] | In this paper, we construct thin-shell wormholes in (2+1)-dimensions from noncommutative BTZ black hole by applying the cut-and-paste procedure implemented by Visser. We calculate the surface stresses localized at the wormhole throat by using the Darmois-Israel formalism, and we find that the wormholes are supported by... |
1611.06935 | Guido Pizzella | R. de Sangro, G. Finocchiaro, P. Patteri, M. Piccolo, G. Pizzella | Why the interpretation of "Measuring propagation speed of Coulomb
fields" stands | 3 pages | null | 10.1140/epjc/s10052-017-4650-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The experimental findings reported in our original paper [1]
(arXiv:1211.2913) have been criticized in ref.[2] (arXiv:1606.00710). We
believe that the arguments brought in ref. [2] are not correct and we show
evidence for this.
| [
{
"created": "Fri, 18 Nov 2016 10:25:59 GMT",
"version": "v1"
}
] | 2017-03-08 | [
[
"de Sangro",
"R.",
""
],
[
"Finocchiaro",
"G.",
""
],
[
"Patteri",
"P.",
""
],
[
"Piccolo",
"M.",
""
],
[
"Pizzella",
"G.",
""
]
] | The experimental findings reported in our original paper [1] (arXiv:1211.2913) have been criticized in ref.[2] (arXiv:1606.00710). We believe that the arguments brought in ref. [2] are not correct and we show evidence for this. |
0704.3102 | Hernando Quevedo | Hernando Quevedo | Geometrothermodynamics of black holes | Revised version, to be published in Gen.Rel.Grav.(Mashhoon's
Festschrift) | Gen.Rel.Grav.40:971-984,2008 | 10.1007/s10714-007-0586-0 | null | gr-qc | null | The thermodynamics of black holes is reformulated within the context of the
recently developed formalism of geometrothermodynamics. This reformulation is
shown to be invariant with respect to Legendre transformations, and to allow
several equivalent representations. Legendre invariance allows us to explain a
series o... | [
{
"created": "Tue, 24 Apr 2007 01:37:35 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Jul 2007 18:33:21 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Quevedo",
"Hernando",
""
]
] | The thermodynamics of black holes is reformulated within the context of the recently developed formalism of geometrothermodynamics. This reformulation is shown to be invariant with respect to Legendre transformations, and to allow several equivalent representations. Legendre invariance allows us to explain a series of ... |
1111.2647 | Peter Komorowski | N. Kiriushcheva, P. G. Komorowski and S. V. Kuzmin | Comment on "Arnowitt--Deser--Misner representation and Hamiltonian
analysis of covariant renormalizable gravity" by M. Chaichian, M. Oksanen, A.
Tureanu | 10 Pages. We found a mistake in our first version -- the Horava-type
models of EPJC 71, 1657 (2011) do have a spatial diffeomorphism gauge
symmetry, but the partial Hamiltonian analysis of the action presented in the
EPJC paper has been confirmed to be incorrect. The true algebra of
constraints is different fro... | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The partial Hamiltonian analysis of the actions presented in the paper by M.
Chaichian, M. Oksanen, A. Tureanu (Eur. Phys. J. C 71, 1657 (2011)) is
incorrect; the true algebra of constraints differs from what they claim for
their choice of momentum constraint. Our blind acceptance of the correctness of
their constrai... | [
{
"created": "Fri, 11 Nov 2011 02:36:50 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Nov 2011 23:41:06 GMT",
"version": "v2"
},
{
"created": "Sun, 20 Nov 2011 21:55:10 GMT",
"version": "v3"
}
] | 2011-11-22 | [
[
"Kiriushcheva",
"N.",
""
],
[
"Komorowski",
"P. G.",
""
],
[
"Kuzmin",
"S. V.",
""
]
] | The partial Hamiltonian analysis of the actions presented in the paper by M. Chaichian, M. Oksanen, A. Tureanu (Eur. Phys. J. C 71, 1657 (2011)) is incorrect; the true algebra of constraints differs from what they claim for their choice of momentum constraint. Our blind acceptance of the correctness of their constraint... |
gr-qc/9905106 | Martin Rainer | Martin Rainer | Cones and causal structures on topological and differentiable manifolds | v3: 12 pages, latex+amssymb; compatibility conditions (2.5) and (3.2)
with misprints corrected and improved argument | J.Math.Phys. 40 (1999) 6589-6597; Erratum-ibid. 41 (2000) 3303 | 10.1063/1.533108 | null | gr-qc | null | General definitions for causal structures on manifolds of dimension d+1>2 are
presented for the topological category and for any differentiable one.
Locally, these are given as cone structures via local (pointwise)
homeomorphic or diffeomorphic abstraction from the standard null cone variety
in R^{d+1}. Weak and st... | [
{
"created": "Mon, 31 May 1999 21:43:01 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Oct 1999 10:43:45 GMT",
"version": "v2"
},
{
"created": "Wed, 5 Jan 2000 17:30:17 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Rainer",
"Martin",
""
]
] | General definitions for causal structures on manifolds of dimension d+1>2 are presented for the topological category and for any differentiable one. Locally, these are given as cone structures via local (pointwise) homeomorphic or diffeomorphic abstraction from the standard null cone variety in R^{d+1}. Weak and strong... |
2307.04678 | Frans Klinkhamer | Frans R. Klinkhamer | New Type of Traversable Wormhole | Invited paper at Bahamas Advanced Study Institute & Conferences
(BASIC), February 8-14, 2023, Stella Maris, Long Island, Bahamas. v2: final
version to appear in Bulg. J. Phys | null | null | KA-TP-13-2023 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review a new traversable-wormhole solution of the gravitational field
equation of general relativity without exotic matter. Instead of having exotic
matter to keep the wormhole throat open, the solution relies on a 3-dimensional
"spacetime defect," which is characterized by a locally vanishing metric
determinant. ... | [
{
"created": "Thu, 6 Jul 2023 17:40:22 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jul 2023 13:00:49 GMT",
"version": "v2"
}
] | 2023-07-25 | [
[
"Klinkhamer",
"Frans R.",
""
]
] | We review a new traversable-wormhole solution of the gravitational field equation of general relativity without exotic matter. Instead of having exotic matter to keep the wormhole throat open, the solution relies on a 3-dimensional "spacetime defect," which is characterized by a locally vanishing metric determinant. We... |
2107.05171 | Xiao-Mei Kuang | Ru Ling, Hong Guo, Hang Liu, Xiao-Mei Kuang, Bin Wang | Shadow and near-horizon characteristics of the acoustic charged black
hole in curved spacetime | Published version | Physical Review D 104, 104003 (2021) | 10.1103/PhysRevD.104.104003 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we first analyze the horizon structure of the acoustic charged
black hole in curved spacetime, and then study its acoustic shadow as well as
the near-horizon characteristics including the quasinormal modes (QNM)
frequencies and analogue Hawking radiation. We find that the radius of the
acoustic shadow ... | [
{
"created": "Mon, 12 Jul 2021 03:05:23 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Nov 2021 04:49:25 GMT",
"version": "v2"
}
] | 2021-11-03 | [
[
"Ling",
"Ru",
""
],
[
"Guo",
"Hong",
""
],
[
"Liu",
"Hang",
""
],
[
"Kuang",
"Xiao-Mei",
""
],
[
"Wang",
"Bin",
""
]
] | In this paper, we first analyze the horizon structure of the acoustic charged black hole in curved spacetime, and then study its acoustic shadow as well as the near-horizon characteristics including the quasinormal modes (QNM) frequencies and analogue Hawking radiation. We find that the radius of the acoustic shadow fo... |
gr-qc/9407009 | Othmar Brodbeck | Othmar Brodbeck and Norbert Straumann | Instability Proof for Einstein-Yang-Mills Solitons with Arbitrary Gauge
Groups | 18 pages, Latex, ZU-TH 19/94 | null | null | null | gr-qc | null | We prove that static, spherically symmetric, asymptotically flat, regular
solutions of the Einstein-Yang-Mills equations are unstable for arbitrary gauge
groups, at least for the ``generic" case. This conclusion is derived without
explicit knowledge of the possible equilibrium solutions.
| [
{
"created": "Tue, 12 Jul 1994 11:45:59 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Brodbeck",
"Othmar",
""
],
[
"Straumann",
"Norbert",
""
]
] | We prove that static, spherically symmetric, asymptotically flat, regular solutions of the Einstein-Yang-Mills equations are unstable for arbitrary gauge groups, at least for the ``generic" case. This conclusion is derived without explicit knowledge of the possible equilibrium solutions. |
gr-qc/0502015 | Valerio Faraoni | Valerio Faraoni (Bishop's University) | Phase space geometry in scalar-tensor cosmology | 18 pages, 9 figures, latex, to appear in Ann. Phys. (NY) | Ann.Phys.317:366-382,2005 | 10.1016/j.aop.2004.11.009 | null | gr-qc astro-ph | null | We study the phase space of spatially homogeneous and isotropic cosmology in
general scalar-tensor theories. A reduction to a two-dimensional phase space is
performed when possible-in these situations the phase space is usually a
two-dimensional curved surface embedded in a three-dimensional space and
composed of two... | [
{
"created": "Thu, 3 Feb 2005 20:54:04 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Faraoni",
"Valerio",
"",
"Bishop's University"
]
] | We study the phase space of spatially homogeneous and isotropic cosmology in general scalar-tensor theories. A reduction to a two-dimensional phase space is performed when possible-in these situations the phase space is usually a two-dimensional curved surface embedded in a three-dimensional space and composed of two s... |
0803.0416 | Jesus Martin-Martin | J. Martin and A. Tiemblo | The role of translational invariance in non linear gauge theories of
gravity | 17 pages, LaTeX | Int.J.Geom.Meth.Mod.Phys.05:253-264,2008 | 10.1142/S0219887808002734 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The internal structure of the tetrads in a Poincar\'e non linear gauge theory
of gravity is considered. Minkowskian coordinates becomes dynamical degrees of
freedom playing the role of Goldstone bosons of the translations. A critical
length allowing a covariant expansion similar to the weak field approach is
deduced,... | [
{
"created": "Tue, 4 Mar 2008 11:34:48 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Martin",
"J.",
""
],
[
"Tiemblo",
"A.",
""
]
] | The internal structure of the tetrads in a Poincar\'e non linear gauge theory of gravity is considered. Minkowskian coordinates becomes dynamical degrees of freedom playing the role of Goldstone bosons of the translations. A critical length allowing a covariant expansion similar to the weak field approach is deduced, t... |
1409.0527 | Hooman Moradpour Hooman | Hooman Moradpour and Nematollah Riazi | Dynamic conformal spherically symmetric solutions in an accelerated
background | Accepted by Rom. Rep. Phys | Romanian Reports in Physics, Vol. 68, No. 4, P. 1382--1396 (2016) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider dynamical spherically symmetric spacetimes, which are conformal
to the static spherically symmetric metrics, and find new solutions of Einstein
equations by symmetry considerations. Our study help us classify various
conformal Black Holes that are embedded within a dynamic background into the
one class of... | [
{
"created": "Sun, 31 Aug 2014 14:27:22 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Feb 2015 08:04:27 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Jun 2015 10:26:30 GMT",
"version": "v3"
},
{
"created": "Mon, 3 Aug 2015 12:48:44 GMT",
"version": "v4"
}
] | 2016-12-23 | [
[
"Moradpour",
"Hooman",
""
],
[
"Riazi",
"Nematollah",
""
]
] | We consider dynamical spherically symmetric spacetimes, which are conformal to the static spherically symmetric metrics, and find new solutions of Einstein equations by symmetry considerations. Our study help us classify various conformal Black Holes that are embedded within a dynamic background into the one class of s... |
gr-qc/9912083 | Gaetano Lambiase | S. Capozziello, G. Lambiase | Selection Rules in Minisuperspace Quantum Cosmology | LaTex file, 22 pag., no figures, to appear in Gen. Rel. Grav | Gen.Rel.Grav. 32 (2000) 673-696 | 10.1023/A:1001967102409 | null | gr-qc | null | The existence of a Noether symmetry for a given minisuperspace cosmological
model is a sort of selection rule to recover classical behaviours in cosmic
evolution since oscillatory regimes for the wave function of the universe come
out. The so called Hartle criterion to select correlated regions in the
configuration s... | [
{
"created": "Mon, 20 Dec 1999 18:22:40 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Capozziello",
"S.",
""
],
[
"Lambiase",
"G.",
""
]
] | The existence of a Noether symmetry for a given minisuperspace cosmological model is a sort of selection rule to recover classical behaviours in cosmic evolution since oscillatory regimes for the wave function of the universe come out. The so called Hartle criterion to select correlated regions in the configuration spa... |
gr-qc/0502037 | Oliver Rinne | Oliver Rinne and John M. Stewart | A strongly hyperbolic and regular reduction of Einstein's equations for
axisymmetric spacetimes | 22 pages, to appear in Class. Quantum Grav. 22 | Class. Quantum Grav. 22, 1143-1166 (2005) | 10.1088/0264-9381/22/6/015 | DAMTP-2005-17 | gr-qc | null | This paper is concerned exclusively with axisymmetric spacetimes. We want to
develop reductions of Einstein's equations which are suitable for numerical
evolutions. We first make a Kaluza-Klein type dimensional reduction followed by
an ADM reduction on the Lorentzian 3-space, the (2+1)+1 formalism. We include
also th... | [
{
"created": "Wed, 9 Feb 2005 15:16:38 GMT",
"version": "v1"
}
] | 2008-11-22 | [
[
"Rinne",
"Oliver",
""
],
[
"Stewart",
"John M.",
""
]
] | This paper is concerned exclusively with axisymmetric spacetimes. We want to develop reductions of Einstein's equations which are suitable for numerical evolutions. We first make a Kaluza-Klein type dimensional reduction followed by an ADM reduction on the Lorentzian 3-space, the (2+1)+1 formalism. We include also the ... |
1503.05552 | Subenoy Chakraborty | Subenoy Chakraborty, Supriya Pan, and Subhajit Saha | A unified cosmic evolution: Inflation to late time acceleration | 21 pages, 17 figures, some typos corrected, references updated | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present work deals with a cosmological model having particle creation
mechanism in the framework of irreversible thermodynamics. In the second order
non-equilibrium thermodynamical prescription, the particle creation rate is
treated as the dissipative effect. The non-equilibrium thermodynamical process
is assumed... | [
{
"created": "Wed, 18 Mar 2015 18:54:20 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Apr 2015 12:36:50 GMT",
"version": "v2"
}
] | 2015-05-01 | [
[
"Chakraborty",
"Subenoy",
""
],
[
"Pan",
"Supriya",
""
],
[
"Saha",
"Subhajit",
""
]
] | The present work deals with a cosmological model having particle creation mechanism in the framework of irreversible thermodynamics. In the second order non-equilibrium thermodynamical prescription, the particle creation rate is treated as the dissipative effect. The non-equilibrium thermodynamical process is assumed t... |
1103.6140 | Vyacheslav Ivanovich Dokuchaev | Vyacheslav I. Dokuchaev | Is there life inside black holes? | 11 pages, 5 figures; references added | Class. Quantum Grav. 28 (2011) 235015 | 10.1088/0264-9381/28/23/235015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bound inside rotating or charged black holes, there are stable periodic
planetary orbits, which neither come out nor terminate at the central
singularity. Stable periodic orbits inside black holes exist even for photons.
These bound orbits may be defined as orbits of the third kind, following the
Chandrasekhar classi... | [
{
"created": "Thu, 31 Mar 2011 10:50:03 GMT",
"version": "v1"
},
{
"created": "Sat, 9 Apr 2011 17:04:02 GMT",
"version": "v2"
},
{
"created": "Fri, 13 May 2011 12:34:09 GMT",
"version": "v3"
},
{
"created": "Fri, 18 Nov 2011 17:50:52 GMT",
"version": "v4"
}
] | 2015-03-19 | [
[
"Dokuchaev",
"Vyacheslav I.",
""
]
] | Bound inside rotating or charged black holes, there are stable periodic planetary orbits, which neither come out nor terminate at the central singularity. Stable periodic orbits inside black holes exist even for photons. These bound orbits may be defined as orbits of the third kind, following the Chandrasekhar classifi... |
gr-qc/0009085 | Rafael A. Vera | Rafael A. Vera | Conflict between the Gravitational Field Energy and the Experiments | Standard Latex, 24 pages. Submitted to Physical Reviews D Minor but
important changes are made up to prevent any arguments based in
non-experimental facts | null | null | null | gr-qc | null | From the equivalence principle and true gravitational (G) time dilation
experiments it is concluded that ``matter is not invariable after a change of
relative position with respect to other bodies''. As a general principle (GP),
such variations cannot be locally detected because the basic parameters of all
of the 'we... | [
{
"created": "Mon, 25 Sep 2000 14:37:47 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Feb 2001 08:25:54 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Vera",
"Rafael A.",
""
]
] | From the equivalence principle and true gravitational (G) time dilation experiments it is concluded that ``matter is not invariable after a change of relative position with respect to other bodies''. As a general principle (GP), such variations cannot be locally detected because the basic parameters of all of the 'well... |
2004.12523 | Osvaldo Pablo Santillan | J. Osorio Morales and O. Santill\'an | About apparent superluminal drives in generic gravity theories | Some typos corrected | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As is well known, there exists warp drives in GR, such as the Alcubierre
bubbles, which achieve an apparent faster than light travel \cite{alcubierre}.
A result due to Gao and Wald \cite{gaowald} suggests that such a travel is
unlikely for GR with matter satisfying both the Null Energy and the Null
Generic Conditions... | [
{
"created": "Mon, 27 Apr 2020 00:55:03 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Aug 2021 22:54:07 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Nov 2021 00:37:13 GMT",
"version": "v3"
},
{
"created": "Thu, 14 Apr 2022 23:52:31 GMT",
"version": "v4"
}
] | 2022-04-18 | [
[
"Morales",
"J. Osorio",
""
],
[
"Santillán",
"O.",
""
]
] | As is well known, there exists warp drives in GR, such as the Alcubierre bubbles, which achieve an apparent faster than light travel \cite{alcubierre}. A result due to Gao and Wald \cite{gaowald} suggests that such a travel is unlikely for GR with matter satisfying both the Null Energy and the Null Generic Conditions. ... |
gr-qc/0410076 | Michael A. Ivanov | Michael A. Ivanov | May gravitons be super-strong interacting particles? | 6 pages without figures, LaTeX. Contribution to The 14th Workshop on
General Relativity and Gravitation (JGRG14), which will be held in Nov 29 -
Dec 3 2004, Kyoto, Japan | null | null | null | gr-qc | null | A scheme, in which gravitons are super-strong interacting, is described. The
graviton background with the Planckian spectrum and a small effective
temperature is considered as a reservoir of gravitons. A cross-section of
interaction of a graviton with any particle is assumed to be a bilinear
function of its energies.... | [
{
"created": "Mon, 18 Oct 2004 06:34:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ivanov",
"Michael A.",
""
]
] | A scheme, in which gravitons are super-strong interacting, is described. The graviton background with the Planckian spectrum and a small effective temperature is considered as a reservoir of gravitons. A cross-section of interaction of a graviton with any particle is assumed to be a bilinear function of its energies. A... |
gr-qc/9808028 | Jacob D. Bekenstein | Jacob D. Bekenstein (Hebrew University, Jerusalem) | Black Holes: Classical Properties, Thermodynamics and Heuristic
Quantization | LaTeX, 44 pages, 4 eps figs. and conf_cg.sty included. Lectures
delivered at the IX Brazilian School on Cosmology and Gravitation, Rio de
Janeiro 7-8/98. Updated references and positioning on page corrected | in Cosmology and Gravitation, M. Novello, ed. (Atlantisciences,
France 2000), pp. 1-85 | null | null | gr-qc | null | I discuss the no hair principle, the recently found hairy solutions, generic
properties of nonvacuum spherical static black holes, and the new no scalar
hair theorems. I go into the generic phenomenon of superradiance, first uniform
linear motion superradiance, then Kerr black hole superradiance, and finally
general ... | [
{
"created": "Tue, 11 Aug 1998 08:12:01 GMT",
"version": "v1"
},
{
"created": "Fri, 30 Oct 1998 07:40:51 GMT",
"version": "v2"
},
{
"created": "Mon, 2 Nov 1998 10:33:31 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Bekenstein",
"Jacob D.",
"",
"Hebrew University, Jerusalem"
]
] | I discuss the no hair principle, the recently found hairy solutions, generic properties of nonvacuum spherical static black holes, and the new no scalar hair theorems. I go into the generic phenomenon of superradiance, first uniform linear motion superradiance, then Kerr black hole superradiance, and finally general ro... |
1901.02785 | Dmitri Gal'tsov | D.V. Gal'tsov and K.V. Kobialko | Completing characterization of photon orbits in Kerr and Kerr-Newman
metrics | Minor corrections, editing, Appendix added. 33 pages, 52 figures | Phys. Rev. D 99, 084043 (2019) | 10.1103/PhysRevD.99.084043 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, several new characteristics have been introduced to describe null
geodesic structure of stationary spacetimes, such as photon regions (PR) and
transversely trapping surfaces (TTS). The former are three-dimensional domains
confining the spherical photon orbits, while the latter are closed two-surface
of sphe... | [
{
"created": "Wed, 9 Jan 2019 15:43:57 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Jan 2019 16:07:57 GMT",
"version": "v2"
}
] | 2019-05-01 | [
[
"Gal'tsov",
"D. V.",
""
],
[
"Kobialko",
"K. V.",
""
]
] | Recently, several new characteristics have been introduced to describe null geodesic structure of stationary spacetimes, such as photon regions (PR) and transversely trapping surfaces (TTS). The former are three-dimensional domains confining the spherical photon orbits, while the latter are closed two-surface of spheri... |
1005.3110 | Morteza Mohseni | Morteza Mohseni | Stability of circular orbits of spinning particles in Schwarzschild-like
space-times | eps figures, submitted to General Relativity and Gravitation | Gen.Rel.Grav.42:2477-2490,2010 | 10.1007/s10714-010-0995-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Circular orbits of spinning test particles and their stability in
Schwarzschild-like backgrounds are investigated. For these space-times the
equations of motion admit solutions representing circular orbits with particles
spins being constant and normal to the plane of orbits. For the de Sitter
background the orbits a... | [
{
"created": "Tue, 18 May 2010 06:32:12 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Mohseni",
"Morteza",
""
]
] | Circular orbits of spinning test particles and their stability in Schwarzschild-like backgrounds are investigated. For these space-times the equations of motion admit solutions representing circular orbits with particles spins being constant and normal to the plane of orbits. For the de Sitter background the orbits are... |
2009.05459 | Christian Pfeifer | Manuel Hohmann, Christian Pfeifer, Nicoleta Voicu | Canonical variational completion and 4D Gauss-Bonnet gravity | 16 pages | The European Physical Journal Plus volume 136, Article number: 180
(2021) | 10.1140/epjp/s13360-021-01153-0 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, a proposal to obtain a finite contribution of second derivative
order to the gravitational field equations in \(D = 4\) dimensions from a
renormalized Gauss-Bonnet term in the action has received a wave of attention.
It triggered a discussion whether the employed renormalization procedure yields
a well-defi... | [
{
"created": "Fri, 11 Sep 2020 14:12:29 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Dec 2020 11:22:54 GMT",
"version": "v2"
},
{
"created": "Tue, 9 Feb 2021 10:50:30 GMT",
"version": "v3"
}
] | 2021-02-10 | [
[
"Hohmann",
"Manuel",
""
],
[
"Pfeifer",
"Christian",
""
],
[
"Voicu",
"Nicoleta",
""
]
] | Recently, a proposal to obtain a finite contribution of second derivative order to the gravitational field equations in \(D = 4\) dimensions from a renormalized Gauss-Bonnet term in the action has received a wave of attention. It triggered a discussion whether the employed renormalization procedure yields a well-define... |
2005.12384 | Davi Rodrigues | Davi C. Rodrigues, Valerio Marra | The radial acceleration relation and its emergent nature | 2 pages, 1 figure. To appear in the Proceedings IAU Symposium No.
359, 2020. Galaxy evolution and feedback across different environments
(Galfeed) | Proc. IAU 15 (2020) 457-459 | 10.1017/S1743921320001684 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review some of our recent results about the Radial Acceleration Relation
(RAR) and its interpretation as either a fundamental or an emergent law. The
former interpretation is in agreement with a class of modified gravity theories
that dismiss the need for dark matter in galaxies (MOND in particular). Our
most rece... | [
{
"created": "Mon, 25 May 2020 20:30:08 GMT",
"version": "v1"
}
] | 2021-07-01 | [
[
"Rodrigues",
"Davi C.",
""
],
[
"Marra",
"Valerio",
""
]
] | We review some of our recent results about the Radial Acceleration Relation (RAR) and its interpretation as either a fundamental or an emergent law. The former interpretation is in agreement with a class of modified gravity theories that dismiss the need for dark matter in galaxies (MOND in particular). Our most recent... |
0706.3538 | Fabrizio Canfora | F. Canfora | Some solutions with torsion in Chern-Simons gravity and observable
effects | 17 pages, no figures; test polished; references added; physical
interpretation clarified; | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that in all odd dimensional Chern-Simons theories states in which
the torsion is non zero (but it can approach smoothly to zero outside suitable
regions) do exist. Some possible observational effects related to neutrino
oscillations are pointed out. In the theory of continuum media (in which
suitable defe... | [
{
"created": "Sun, 24 Jun 2007 22:31:19 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Jul 2008 15:41:53 GMT",
"version": "v2"
}
] | 2008-07-02 | [
[
"Canfora",
"F.",
""
]
] | It is shown that in all odd dimensional Chern-Simons theories states in which the torsion is non zero (but it can approach smoothly to zero outside suitable regions) do exist. Some possible observational effects related to neutrino oscillations are pointed out. In the theory of continuum media (in which suitable defect... |
1910.09245 | Manuel Hohmann | Manuel Hohmann | Gauge-invariant approach to the parametrized post-Newtonian formalism | LaTeX, 21 pages, no figures; published version | Phys. Rev. D 101, 024061 (2020) | 10.1103/PhysRevD.101.024061 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an approach to the parametrized post-Newtonian (PPN) formalism
which is based on gauge-invariant higher order perturbation theory. This
approach divides the components of the metric perturbations into
gauge-invariant quantities, which carry information about the physical system
under consideration, and pur... | [
{
"created": "Mon, 21 Oct 2019 10:02:09 GMT",
"version": "v1"
},
{
"created": "Tue, 4 Feb 2020 06:27:44 GMT",
"version": "v2"
}
] | 2020-02-05 | [
[
"Hohmann",
"Manuel",
""
]
] | We present an approach to the parametrized post-Newtonian (PPN) formalism which is based on gauge-invariant higher order perturbation theory. This approach divides the components of the metric perturbations into gauge-invariant quantities, which carry information about the physical system under consideration, and pure ... |
1309.4685 | Andrzej Okolow | Andrzej Okolow | ADM-like Hamiltonian formulation of gravity in the teleparallel
geometry: derivation of constraint algebra | 50 pages, LaTeX2e. The original 73 page paper arXiv:1111.5498v1 was
revised and divided into two parts. The present paper is the second part of
the original one (the first part is available as arXiv:1111.5498v2) | Gen. Rel. Grav. 46, 1636 (2014) | 10.1007/s10714-013-1636-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a new constraint algebra for a Hamiltonian formulation of the
Teleparallel Equivalent of General Relativity treated as a theory of cotetrad
fields on a spacetime. The algebra turns out to be closed.
| [
{
"created": "Wed, 18 Sep 2013 15:46:24 GMT",
"version": "v1"
}
] | 2021-06-22 | [
[
"Okolow",
"Andrzej",
""
]
] | We derive a new constraint algebra for a Hamiltonian formulation of the Teleparallel Equivalent of General Relativity treated as a theory of cotetrad fields on a spacetime. The algebra turns out to be closed. |
gr-qc/0504090 | Kourosh Nozari | Kourosh Nozari and Tahereh Azizi | Coherent States of Harmonic Oscillator and Generalized Uncertainty
Principle | 12 pages, no figure | Int.J.Quant.Inf. 3 (2005) 623-632 | 10.1142/S0219749905001468 | null | gr-qc | null | In this paper dynamics and quantum mechanical coherent states of a simple
harmonic oscillator are considered in the framework of Generalized Uncertainty
Principle(GUP). Equations of motion for simple harmonic oscillator are derived
and some of their new implications are discussed. Then coherent states of
harmonic osc... | [
{
"created": "Wed, 20 Apr 2005 11:12:37 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Nozari",
"Kourosh",
""
],
[
"Azizi",
"Tahereh",
""
]
] | In this paper dynamics and quantum mechanical coherent states of a simple harmonic oscillator are considered in the framework of Generalized Uncertainty Principle(GUP). Equations of motion for simple harmonic oscillator are derived and some of their new implications are discussed. Then coherent states of harmonic oscil... |
gr-qc/0601134 | Alfredo Henriques Barbosa | Alfredo B. Henriques | Loop quantum cosmology and the Wheeler-De Witt equation | 17 pages; 5 figures | Gen.Rel.Grav. 38 (2006) 1645-1659 | 10.1007/s10714-006-0330-1 | null | gr-qc | null | We present some results concerning the large volume limit of loop quantum
cosmology in the flat homogeneous and isotropic case. We derive the Wheeler-De
Witt equation in this limit. Looking for the action from which this equation
can also be obtained, we then address the problem of the modifications to be
brought to ... | [
{
"created": "Mon, 30 Jan 2006 15:33:33 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Henriques",
"Alfredo B.",
""
]
] | We present some results concerning the large volume limit of loop quantum cosmology in the flat homogeneous and isotropic case. We derive the Wheeler-De Witt equation in this limit. Looking for the action from which this equation can also be obtained, we then address the problem of the modifications to be brought to th... |
1910.13448 | Matteo Braglia | M. Ballardini, M. Braglia, F. Finelli, G. Marozzi, A. A. Starobinsky | Energy-momentum tensor and helicity for gauge fields coupled to a
pseudo-scalar inflaton | 18 pages, 9 figures. Corrected some typos and removed Appendix B. The
results are unchanged | Phys. Rev. D 100, 123542 (2019) | 10.1103/PhysRevD.100.123542 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the energy-momentum tensor and helicity of gauge fields coupled
through $g \phi F \tilde{F}/4$ to a pseudo-scalar field $\phi$ driving
inflation. Under the assumption of a constant time derivative of the background
inflaton, we compute analitically divergent and finite terms of the energy
density and helicit... | [
{
"created": "Tue, 29 Oct 2019 15:38:58 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Dec 2019 11:04:30 GMT",
"version": "v2"
},
{
"created": "Sat, 15 Jan 2022 09:44:32 GMT",
"version": "v3"
}
] | 2022-01-19 | [
[
"Ballardini",
"M.",
""
],
[
"Braglia",
"M.",
""
],
[
"Finelli",
"F.",
""
],
[
"Marozzi",
"G.",
""
],
[
"Starobinsky",
"A. A.",
""
]
] | We study the energy-momentum tensor and helicity of gauge fields coupled through $g \phi F \tilde{F}/4$ to a pseudo-scalar field $\phi$ driving inflation. Under the assumption of a constant time derivative of the background inflaton, we compute analitically divergent and finite terms of the energy density and helicity ... |
1210.7499 | Naonori Sugiyama | Naonori S. Sugiyama and Toshifumi Futamase | Toward an accurate Dark Matter power spectrum beyond BAO scales | 4 pages, 1 figure | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new approximated expression for non-linear Dark Matter power
spectrum much beyond BAO scales. The proposed expression agrees with the result
of N-body simulation with the accuracy better than 2 % up to k=1.0 [h/Mpc] and
k=0.7 [h/Mpc] at z=3.0 and z=1.0, respectively. Even at z=0.35, the accuracy
remains ... | [
{
"created": "Sun, 28 Oct 2012 19:53:30 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Nov 2012 11:29:25 GMT",
"version": "v2"
},
{
"created": "Fri, 30 Nov 2012 19:25:03 GMT",
"version": "v3"
}
] | 2012-12-03 | [
[
"Sugiyama",
"Naonori S.",
""
],
[
"Futamase",
"Toshifumi",
""
]
] | We propose a new approximated expression for non-linear Dark Matter power spectrum much beyond BAO scales. The proposed expression agrees with the result of N-body simulation with the accuracy better than 2 % up to k=1.0 [h/Mpc] and k=0.7 [h/Mpc] at z=3.0 and z=1.0, respectively. Even at z=0.35, the accuracy remains wi... |
2303.02877 | Jose Miguel Ladino | Jose Miguel Ladino and Eduard Larra\~naga | Eikonal quasinormal modes, photon sphere and shadow of a charged black
hole in the 4D Einstein-Gauss-Bonnet gravity | 16 pages, 5 figures, 5 tables | Int J Theor Phys 62, 209 (2023) | 10.1007/s10773-023-05440-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we investigate the relationship between the geometrical
properties, the photon sphere, the shadow, and the eikonal quasinormal modes of
electrically charged black holes in 4D Einstein-Gauss-Bonnet gravity.
Quasinormal modes are complex frequency oscillations that are dependent on the
geometry of spaceti... | [
{
"created": "Mon, 6 Mar 2023 04:09:49 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Mar 2023 05:59:03 GMT",
"version": "v2"
}
] | 2023-10-03 | [
[
"Ladino",
"Jose Miguel",
""
],
[
"Larrañaga",
"Eduard",
""
]
] | In this work, we investigate the relationship between the geometrical properties, the photon sphere, the shadow, and the eikonal quasinormal modes of electrically charged black holes in 4D Einstein-Gauss-Bonnet gravity. Quasinormal modes are complex frequency oscillations that are dependent on the geometry of spacetime... |
0709.1680 | Madhavan Varadarajan | Madhavan Varadarajan | Towards new background independent representations for Loop Quantum
Gravity | 22 pages, minor changes | Class.Quant.Grav.25:105011,2008 | 10.1088/0264-9381/25/10/105011 | null | gr-qc | null | Recently, uniqueness theorems were constructed for the representation used in
Loop Quantum Gravity. We explore the existence of alternate representations by
weakening the assumptions of the so called LOST uniqueness theorem. The
weakened assumptions seem physically reasonable and retain the key requirement
of explici... | [
{
"created": "Tue, 11 Sep 2007 17:21:48 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Sep 2007 23:55:13 GMT",
"version": "v2"
}
] | 2015-01-30 | [
[
"Varadarajan",
"Madhavan",
""
]
] | Recently, uniqueness theorems were constructed for the representation used in Loop Quantum Gravity. We explore the existence of alternate representations by weakening the assumptions of the so called LOST uniqueness theorem. The weakened assumptions seem physically reasonable and retain the key requirement of explicit ... |
gr-qc/9710119 | Roland Steinbauer | Roland Steinbauer | Geodesics and geodesic deviation for impulsive gravitational waves | final version, minor grammatical changes | J.Math.Phys. 39 (1998) 2201-2212 | 10.1063/1.532283 | null | gr-qc math-ph math.MP | null | The geometry of impulsive pp-waves is explored via the analysis of the
geodesic and geodesic deviation equation using the distributional form of the
metric. The geodesic equation involves formally ill-defined products of
distributions due to the nonlinearity of the equations and the presence of the
Dirac $\de$-distri... | [
{
"created": "Tue, 28 Oct 1997 16:14:15 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Mar 1998 12:09:29 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Steinbauer",
"Roland",
""
]
] | The geometry of impulsive pp-waves is explored via the analysis of the geodesic and geodesic deviation equation using the distributional form of the metric. The geodesic equation involves formally ill-defined products of distributions due to the nonlinearity of the equations and the presence of the Dirac $\de$-distribu... |
1003.3324 | Bernard J. Carr | B. J. Carr, Tomohiro Harada and Hideki Maeda | Can a primordial black hole or wormhole grow as fast as the universe? | 17 pages, 9 figures | null | 10.1088/0264-9381/27/18/183101 | RESCEU-8/10, CECS-PH-10/02 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This review addresses the issue of whether there are physically realistic
self-similar solutions in which a primordial black hole is attached to an exact
or asymptotically Friedmann model for an equation of state of the form
$p=(\gamma-1)\rho c^2$. In the positive pressure case ($1 < \gamma < 2$), there
is no such so... | [
{
"created": "Wed, 17 Mar 2010 08:47:00 GMT",
"version": "v1"
}
] | 2015-05-18 | [
[
"Carr",
"B. J.",
""
],
[
"Harada",
"Tomohiro",
""
],
[
"Maeda",
"Hideki",
""
]
] | This review addresses the issue of whether there are physically realistic self-similar solutions in which a primordial black hole is attached to an exact or asymptotically Friedmann model for an equation of state of the form $p=(\gamma-1)\rho c^2$. In the positive pressure case ($1 < \gamma < 2$), there is no such solu... |
gr-qc/0403116 | Christos G. Tsagas | N.K. Spyrou (Thessaloniki), C.G. Tsagas (UCT/DAMTP) | Covariant approach to the conformal dynamical equivalence in
astrophysics | 10 pages, to appear in Class. Quantum Grav | Class.Quant.Grav. 21 (2004) 2435-2444 | 10.1088/0264-9381/21/9/017 | null | gr-qc astro-ph | null | We use covariant techniques to examine the implications of the dynamical
equivalence between geodesic motions and adiabatic hydrodynamic flows. Assuming
that the metrics of a geodesically and a non-geodesically moving fluid are
conformally related, we calculate and compare their mass densities. The density
difference... | [
{
"created": "Tue, 30 Mar 2004 19:33:24 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Spyrou",
"N. K.",
"",
"Thessaloniki"
],
[
"Tsagas",
"C. G.",
"",
"UCT/DAMTP"
]
] | We use covariant techniques to examine the implications of the dynamical equivalence between geodesic motions and adiabatic hydrodynamic flows. Assuming that the metrics of a geodesically and a non-geodesically moving fluid are conformally related, we calculate and compare their mass densities. The density difference i... |
1407.7038 | Laura Sampson | Laura Sampson, Nicolas Yunes, Neil Cornish, Marcelo Ponce, Enrico
Barausse, Antoine Klein, Carlos Palenzuela, and Luis Lehner | Projected Constraints on Scalarization with Gravitational Waves from
Neutron Star Binaries | 26 pages, 15 figures, 2 tables. Version resubmitted to PRD after
referee report. Discussion added to the conclusions addressing questions
raised in arXiv:1410.0738 | Phys. Rev. D 90, 124091 (2014) | 10.1103/PhysRevD.90.124091 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Certain scalar-tensor theories have the property of endowing stars with
scalar hair, sourced either by the star's own compactness (spontaneous
scalarization) or, for binary systems, by the companion's scalar hair (induced
scalarization) or by the orbital binding energy (dynamical scalarization).
Scalarized stars in b... | [
{
"created": "Fri, 25 Jul 2014 20:00:08 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Nov 2014 20:44:43 GMT",
"version": "v2"
}
] | 2015-01-07 | [
[
"Sampson",
"Laura",
""
],
[
"Yunes",
"Nicolas",
""
],
[
"Cornish",
"Neil",
""
],
[
"Ponce",
"Marcelo",
""
],
[
"Barausse",
"Enrico",
""
],
[
"Klein",
"Antoine",
""
],
[
"Palenzuela",
"Carlos",
""
],
[
... | Certain scalar-tensor theories have the property of endowing stars with scalar hair, sourced either by the star's own compactness (spontaneous scalarization) or, for binary systems, by the companion's scalar hair (induced scalarization) or by the orbital binding energy (dynamical scalarization). Scalarized stars in bin... |
gr-qc/0001018 | Michael T. Anderson | Michael T. Anderson (SUNY Stony Brook) | On the structure of solutions to the static vacuum Einstein equations | 34 pages, Final version - contains corrections and improvements to
initial version. Annales Henri Poincare, (to appear) | Annales Henri Poincare 1 (2000) 995 | 10.1007/PL00001026 | null | gr-qc math.DG | null | A complete characterization is obtained of the asymptotic behavior of
solutions of the static vacuum Einstein equations which have a (pseudo)-compact
horizon or boundary and are complete away from the boundary. It is proved that
the time-symmetric space-like hypersurface has only finitely many ends, each of
which is ... | [
{
"created": "Fri, 7 Jan 2000 16:25:05 GMT",
"version": "v1"
},
{
"created": "Sun, 29 Oct 2000 19:40:37 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Anderson",
"Michael T.",
"",
"SUNY Stony Brook"
]
] | A complete characterization is obtained of the asymptotic behavior of solutions of the static vacuum Einstein equations which have a (pseudo)-compact horizon or boundary and are complete away from the boundary. It is proved that the time-symmetric space-like hypersurface has only finitely many ends, each of which is ei... |
gr-qc/9510063 | Chris Isham | Chris Isham | Structural Issues in Quantum Gravity | 42 pages, latex, no figures. Writeup of GR14 plenary lecture | null | null | IMPERIAL/TP/95-96/07 | gr-qc hep-th quant-ph | null | A discursive, non-technical, analysis is made of some of the basic issues
that arise in almost any approach to quantum gravity, and of how these issues
stand in relation to recent developments in the field. Specific topics include
the applicability of the conceptual and mathematical structures of both
classical gener... | [
{
"created": "Tue, 31 Oct 1995 22:45:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Isham",
"Chris",
""
]
] | A discursive, non-technical, analysis is made of some of the basic issues that arise in almost any approach to quantum gravity, and of how these issues stand in relation to recent developments in the field. Specific topics include the applicability of the conceptual and mathematical structures of both classical general... |
1408.0306 | Elias C. Vagenas | Leonardo Balart and Elias C. Vagenas | Regular black holes with a nonlinear electrodynamics source | v1: 19 pages, LaTeX, no figures; v2: typos corrected and one
reference removed to match published version in Phys. Rev. D | Phys. Rev. D 90, 124045 (2014) | 10.1103/PhysRevD.90.124045 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct several charged regular black hole metrics employing mass
distribution functions which are inspired by continuous probability
distributions. Some of these metrics satisfy the weak energy condition and
asymptotically behave as the Reissner--Nordstrom black hole. In each case, the
source to the Einstein eq... | [
{
"created": "Fri, 1 Aug 2014 21:08:40 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Dec 2014 18:59:50 GMT",
"version": "v2"
}
] | 2014-12-24 | [
[
"Balart",
"Leonardo",
""
],
[
"Vagenas",
"Elias C.",
""
]
] | We construct several charged regular black hole metrics employing mass distribution functions which are inspired by continuous probability distributions. Some of these metrics satisfy the weak energy condition and asymptotically behave as the Reissner--Nordstrom black hole. In each case, the source to the Einstein equa... |
gr-qc/0608110 | Burkhard Kleihaus | Theodora Ioannidou, Burkhard Kleihaus and Jutta Kunz | Spinning Gravitating Skyrmions | 13 pages, 6 figures | Phys.Lett.B643:213-220,2006 | 10.1016/j.physletb.2006.10.055 | null | gr-qc hep-th | null | We investigate self-gravitating rotating solutions in the Einstein-Skyrme
theory. These solutions are globally regular and asymptotically flat. We
present a new kind of solutions with zero baryon number, which possess neither
a flat limit nor a static limit.
| [
{
"created": "Fri, 25 Aug 2006 15:24:50 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ioannidou",
"Theodora",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
]
] | We investigate self-gravitating rotating solutions in the Einstein-Skyrme theory. These solutions are globally regular and asymptotically flat. We present a new kind of solutions with zero baryon number, which possess neither a flat limit nor a static limit. |
gr-qc/0309088 | Stephane Fay | Stephane Fay | Noether Symmetry of the Hyperextended Scalar Tensor theory for the FLRW
models | 11 pages | Class.Quant.Grav. 18 (2001) 4863-4870 | 10.1088/0264-9381/18/22/311 | null | gr-qc | null | We study in which conditions the Hyperextended Scalar Tensor theory in an
FLRW background admits a Noether symmetry and derive the vectors field
generating it.
| [
{
"created": "Thu, 18 Sep 2003 12:25:49 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Fay",
"Stephane",
""
]
] | We study in which conditions the Hyperextended Scalar Tensor theory in an FLRW background admits a Noether symmetry and derive the vectors field generating it. |
2003.01070 | Shahram Jalalzadeh | P.V. Moniz and S. Jalalzadeh | From Fractional Quantum Mechanics to Quantum Cosmology: An Overture | 21 pages, 1 figure | Mathematics 8(3), 313 (2020) | 10.3390/math8030313 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Fractional calculus is a couple of centuries old, but its development has
been less embraced and it was only within the last century that a program of
applications for physics started. Regarding quantum physics, it has been only
in the previous decade or so that the corresponding literature resulted in a
set of defyi... | [
{
"created": "Mon, 2 Mar 2020 18:01:34 GMT",
"version": "v1"
}
] | 2020-03-03 | [
[
"Moniz",
"P. V.",
""
],
[
"Jalalzadeh",
"S.",
""
]
] | Fractional calculus is a couple of centuries old, but its development has been less embraced and it was only within the last century that a program of applications for physics started. Regarding quantum physics, it has been only in the previous decade or so that the corresponding literature resulted in a set of defying... |
2304.08659 | Alfredo D. Millano | Alfredo D. Millano (Catolica del Norte U.), Genly Leon (Catolica del
Norte U. and DUT, Durban), Andronikos Paliathanasis (Catolica del Norte U.
and DUT, Durban) | Global dynamics in Einstein-Gauss-Bonnet scalar field cosmology with
matter | 33 pages, 11 compound figures | null | 10.1103/PhysRevD.108.023519 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the dynamics of the field equations in a four-dimensional isotropic
and homogeneous spatially flat Friedmann--Lema\^{\i}tre--Robertson--Walker
geometry in the context of Einstein-Gauss-Bonnet theory with a matter source
and a scalar field coupled to the Gauss-Bonnet scalar. In this theory, the
Gauss-Bonnet t... | [
{
"created": "Mon, 17 Apr 2023 23:20:03 GMT",
"version": "v1"
}
] | 2023-08-02 | [
[
"Millano",
"Alfredo D.",
"",
"Catolica del Norte U."
],
[
"Leon",
"Genly",
"",
"Catolica del\n Norte U. and DUT, Durban"
],
[
"Paliathanasis",
"Andronikos",
"",
"Catolica del Norte U.\n and DUT, Durban"
]
] | We study the dynamics of the field equations in a four-dimensional isotropic and homogeneous spatially flat Friedmann--Lema\^{\i}tre--Robertson--Walker geometry in the context of Einstein-Gauss-Bonnet theory with a matter source and a scalar field coupled to the Gauss-Bonnet scalar. In this theory, the Gauss-Bonnet ter... |
gr-qc/0512166 | Aleksandr Zheltukhin | A.A. Zheltukhin | Supersymmetric Lorentz invariant deformations of superspaces | Latex, 13 pages, no figures; Talk at the Conference ``Cosmology 2005:
a reality check'', December 14-17, 2005, Copenhagen, Denmark; To appear at
http://www.astro.ku.dk/dark/workshops/dark05/presentations.html | Mod.Phys.Lett.A21:2117-2132,2006 | 10.1142/S0217732306021517 | null | gr-qc | null | Lorentz invariant supersymmetric deformations of superspaces based on Moyal
star product parametrized by Majorana spinor $\lambda_{a}$ and Ramond
grassmannian vector $\psi_{m}=-{1\over 2}(\bar\theta\gamma_{m}\lambda)$ in the
spinor realization \cite{VZ} are proposed. The map of supergravity background
into composite ... | [
{
"created": "Fri, 30 Dec 2005 17:04:34 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Zheltukhin",
"A. A.",
""
]
] | Lorentz invariant supersymmetric deformations of superspaces based on Moyal star product parametrized by Majorana spinor $\lambda_{a}$ and Ramond grassmannian vector $\psi_{m}=-{1\over 2}(\bar\theta\gamma_{m}\lambda)$ in the spinor realization \cite{VZ} are proposed. The map of supergravity background into composite su... |
gr-qc/0408095 | Spiros Cotsakis | Spiros Cotsakis | Slice Energy in Higher Order Gravity Theories and Conformal
Transformations | 18 pages, references added, remark added in last Section related to
the choice of physical frame, various other improvements, final version to
appear in Gravitation and Cosmology | Grav.Cosmol.14:176-183,2008 | 10.1134/S0202289308020096 | null | gr-qc | null | We study the generic transport of slice energy between the scalar field
generated by the conformal transformation of higher-order gravity theories and
the matter component. We give precise relations for this exchange in the cases
of dust and perfect fluids. We show that, unless we are in a stationary
spacetime where ... | [
{
"created": "Mon, 30 Aug 2004 13:29:57 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Dec 2004 10:05:56 GMT",
"version": "v2"
},
{
"created": "Wed, 30 Jan 2008 15:08:49 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Cotsakis",
"Spiros",
""
]
] | We study the generic transport of slice energy between the scalar field generated by the conformal transformation of higher-order gravity theories and the matter component. We give precise relations for this exchange in the cases of dust and perfect fluids. We show that, unless we are in a stationary spacetime where sl... |
1407.6294 | Chandrachur Chakraborty | Chandrachur Chakraborty | Anomalous Lense-Thirring precession in Kerr-Taub-NUT spacetimes | LaTex; 12 pages including 16 figures, modified version, accepted for
publication in Eur. Phys. J. C | Eur. Phys. J. C (2015) 75:572 | 10.1140/epjc/s10052-015-3785-y | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Exact Lense-Thirring (LT) precession in Kerr-Taub-NUT spacetime is reviewed.
It is shown that the LT precession does not obey the general inverse cube law
of distance at strong gravity regime in Kerr-Taub-NUT spacetime. Rather, it
becomes maximum just near the horizon, falls sharply and becomes zero near the
horizon.... | [
{
"created": "Wed, 23 Jul 2014 17:00:53 GMT",
"version": "v1"
},
{
"created": "Sun, 27 Jul 2014 08:57:03 GMT",
"version": "v2"
},
{
"created": "Mon, 11 May 2015 15:23:08 GMT",
"version": "v3"
},
{
"created": "Sat, 7 Nov 2015 08:34:39 GMT",
"version": "v4"
}
] | 2015-12-02 | [
[
"Chakraborty",
"Chandrachur",
""
]
] | Exact Lense-Thirring (LT) precession in Kerr-Taub-NUT spacetime is reviewed. It is shown that the LT precession does not obey the general inverse cube law of distance at strong gravity regime in Kerr-Taub-NUT spacetime. Rather, it becomes maximum just near the horizon, falls sharply and becomes zero near the horizon. T... |
1112.3629 | Neelima Kelkar Dr | D. Batic, N. G. Kelkar, M. Nowakowski | On Born approximation in black hole scattering | null | Eur. Phys. J. C 71, 1831 (2011) | 10.1140/epjc/s10052-011-1831-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A massless field propagating on spherically symmetric black hole metrics such
as the Schwarzschild, Reissner-Nordstr\"{o}m and Reissner-Nordstr\"{o}m-de
Sitter backgrounds is considered. In particular, explicit formulae in terms of
transcendental functions for the scattering of massless scalar particles off
black hol... | [
{
"created": "Thu, 15 Dec 2011 20:11:51 GMT",
"version": "v1"
}
] | 2011-12-16 | [
[
"Batic",
"D.",
""
],
[
"Kelkar",
"N. G.",
""
],
[
"Nowakowski",
"M.",
""
]
] | A massless field propagating on spherically symmetric black hole metrics such as the Schwarzschild, Reissner-Nordstr\"{o}m and Reissner-Nordstr\"{o}m-de Sitter backgrounds is considered. In particular, explicit formulae in terms of transcendental functions for the scattering of massless scalar particles off black holes... |
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