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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1712.04522 | Emil Mottola | Paul R. Anderson, Emil Mottola, and Dillon H. Sanders | Decay of the de Sitter Vacuum | 46 pages, 17 figures | Phys. Rev. D 97, 065016 (2018) | 10.1103/PhysRevD.97.065016 | LA-UR-17-28548 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The decay rate of the Bunch-Davies state of a massive scalar field in the
expanding flat spatial sections of de Sitter space is determined by an analysis
of the particle pair creation process in real time. The Feynman definition of
particle and antiparticle Fourier mode solutions of the scalar wave equation,
and thei... | [
{
"created": "Tue, 12 Dec 2017 21:06:03 GMT",
"version": "v1"
}
] | 2018-04-04 | [
[
"Anderson",
"Paul R.",
""
],
[
"Mottola",
"Emil",
""
],
[
"Sanders",
"Dillon H.",
""
]
] | The decay rate of the Bunch-Davies state of a massive scalar field in the expanding flat spatial sections of de Sitter space is determined by an analysis of the particle pair creation process in real time. The Feynman definition of particle and antiparticle Fourier mode solutions of the scalar wave equation, and their ... |
1011.3418 | Jakub Mielczarek | Jakub Mielczarek and Wlodzimierz Piechocki | Quantum of volume in de Sitter space | 6 pages, 3 figures, version accepted for publication in Phys. Rev. D | Phys.Rev.D83:104003,2011 | 10.1103/PhysRevD.83.104003 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the nonstandard loop quantum cosmology method to quantize a flat
Friedmann-Robertson-Walker cosmological model with a free scalar field and the
cosmological constant $\Lambda>0$. Modification of the Hamiltonian in terms of
loop geometry parametrized by a length $\lambda$ introduces a scale dependence
of the ... | [
{
"created": "Mon, 15 Nov 2010 15:20:33 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Apr 2011 18:21:35 GMT",
"version": "v2"
}
] | 2011-05-12 | [
[
"Mielczarek",
"Jakub",
""
],
[
"Piechocki",
"Wlodzimierz",
""
]
] | We apply the nonstandard loop quantum cosmology method to quantize a flat Friedmann-Robertson-Walker cosmological model with a free scalar field and the cosmological constant $\Lambda>0$. Modification of the Hamiltonian in terms of loop geometry parametrized by a length $\lambda$ introduces a scale dependence of the mo... |
gr-qc/9907023 | Yakov Itin | Yakov Itin, Shmuel Kaniel | On a class of invariant coframe operators with application to gravity | null | J.Math.Phys. 41 (2000) 6318-6340 | 10.1063/1.1287434 | null | gr-qc | null | Let a differential 4D-manifold with a smooth coframe field be given. Consider
the operators on it that are linear in the second order derivatives or
quadratic in the first order derivatives of the coframe, both with coefficients
that depend on the coframe variables. The paper exhibits the class of operators
that are ... | [
{
"created": "Tue, 6 Jul 1999 15:55:23 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Itin",
"Yakov",
""
],
[
"Kaniel",
"Shmuel",
""
]
] | Let a differential 4D-manifold with a smooth coframe field be given. Consider the operators on it that are linear in the second order derivatives or quadratic in the first order derivatives of the coframe, both with coefficients that depend on the coframe variables. The paper exhibits the class of operators that are in... |
1507.05257 | Cosimo Bambi | Cosimo Bambi | Testing the Kerr Paradigm with the Black Hole Shadow | 6 pages, 3 figures. Talk given at the "14th Marcel Grossmann Meeting"
(12-18 July 2015, Rome, Italy). To appear in the conference proceedings | null | 10.1142/9789813226609_0450 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within 5-10 years, submillimeter VLBI facilities will be hopefully able to
image the "shadow" of SgrA$^*$. When a black hole is surrounded by an optically
thin emitting medium, the boundary of the shadow corresponds to the apparent
photon capture sphere and only depends on the background metric. An accurate
determina... | [
{
"created": "Sun, 19 Jul 2015 07:27:20 GMT",
"version": "v1"
}
] | 2017-12-19 | [
[
"Bambi",
"Cosimo",
""
]
] | Within 5-10 years, submillimeter VLBI facilities will be hopefully able to image the "shadow" of SgrA$^*$. When a black hole is surrounded by an optically thin emitting medium, the boundary of the shadow corresponds to the apparent photon capture sphere and only depends on the background metric. An accurate determinati... |
gr-qc/0103013 | A. Miyazaki | A. Miyazaki | Scalar Field as Dark Matter and Machian Cosmological Solution in the
Generalized Scalar-Tensor Theory of Gravitation | 7 pages, LaTeX2e | null | null | null | gr-qc | null | The Machian cosmological solution satisfying $\phi =O(\rho /\omega)$ in the
generalized scalar-tensor theory of gravitation with the varying cosmological
constant is summarized. The scalar field $\phi $ with the exponential potential
is introduced as dark matter and the barotropic evolution of matter in the
universe ... | [
{
"created": "Mon, 5 Mar 2001 18:26:25 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Miyazaki",
"A.",
""
]
] | The Machian cosmological solution satisfying $\phi =O(\rho /\omega)$ in the generalized scalar-tensor theory of gravitation with the varying cosmological constant is summarized. The scalar field $\phi $ with the exponential potential is introduced as dark matter and the barotropic evolution of matter in the universe is... |
0905.4026 | Mariano Hermida de La Rica | Mariano Hermida de La Rica | Conservation of Energy-Momentum in Teleparallel Gravity | 14 pages. No figures. Minimal changes from previous version | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a well-known paper arXiv:gr-qc/0003100 V.C. de Andrade, L. C. T. Guillen
and J.G. Pereira defined a conserved gauge current, however they stated that:
`` This is, we believe the farthest one can go in the direction of a tensorial
definition for the energy and momentum of the gravitational field. The lack of
local ... | [
{
"created": "Mon, 25 May 2009 14:42:28 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Jul 2009 11:28:57 GMT",
"version": "v2"
}
] | 2009-07-10 | [
[
"de La Rica",
"Mariano Hermida",
""
]
] | In a well-known paper arXiv:gr-qc/0003100 V.C. de Andrade, L. C. T. Guillen and J.G. Pereira defined a conserved gauge current, however they stated that: `` This is, we believe the farthest one can go in the direction of a tensorial definition for the energy and momentum of the gravitational field. The lack of local Lo... |
2311.11801 | Yen-Kheng Lim PhD | Mounir Nisse, Yen-Kheng Lim, and Linus Chang | Black hole thermodynamic free energy as $A$-discriminants | 27 pages, 6 figures | International Journal of Theoretical Physics, vol 63 176 (2024) | 10.1007/s10773-024-05711-x | null | gr-qc hep-th math-ph math.AG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the free energy $\mathcal{F}$ and temperature $T$ of black
holes, considered as a thermodynamic system, can be viewed as an
$A$-discriminant of an appropriately-defined polynomial. As such, mathematical
results about $A$-discriminants may lead to implications about black hole
thermodynamics. In particula... | [
{
"created": "Mon, 20 Nov 2023 14:34:28 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jul 2024 07:02:56 GMT",
"version": "v2"
}
] | 2024-07-23 | [
[
"Nisse",
"Mounir",
""
],
[
"Lim",
"Yen-Kheng",
""
],
[
"Chang",
"Linus",
""
]
] | We show that the free energy $\mathcal{F}$ and temperature $T$ of black holes, considered as a thermodynamic system, can be viewed as an $A$-discriminant of an appropriately-defined polynomial. As such, mathematical results about $A$-discriminants may lead to implications about black hole thermodynamics. In particular,... |
1411.0190 | Jing-Bo Wang | Jingbo Wang, Chao-Guang Huang, Lin Li | The Entropy of Nonrotating Isolated Horizons in Lovelock Theory from
Loop Quantum Gravity | 4 pages, no figures | Chinese Physics C Vol. 40, No. 8 (2016) 083102 | 10.1088/1674-1137/40/8/083102 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the BF theory method is applied to the nonrotating isolated
horizons in Lovelock theory. The final entropy matches the Wald entropy formula
for this theory. We also confirm the conclusion got by Bodendorfer et. al. that
the entropy is related to the flux operator rather than the area operator in
genera... | [
{
"created": "Sun, 2 Nov 2014 01:31:50 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Apr 2015 12:32:34 GMT",
"version": "v2"
},
{
"created": "Fri, 17 Jun 2016 07:33:33 GMT",
"version": "v3"
}
] | 2016-06-20 | [
[
"Wang",
"Jingbo",
""
],
[
"Huang",
"Chao-Guang",
""
],
[
"Li",
"Lin",
""
]
] | In this paper, the BF theory method is applied to the nonrotating isolated horizons in Lovelock theory. The final entropy matches the Wald entropy formula for this theory. We also confirm the conclusion got by Bodendorfer et. al. that the entropy is related to the flux operator rather than the area operator in general ... |
0709.0875 | Megan McClure | M. L. McClure and Charles Hellaby | Determining the metric of the Cosmos: stability, accuracy, and
consistency | Revision, 21 pages, 6 figures | Phys.Rev.D78:044005,2008 | 10.1103/PhysRevD.78.044005 | null | gr-qc astro-ph | null | The ultimate application of Einstein's field equations is to empirically
determine the geometry of the Universe from its matter content, rather than
simply assuming the Universe can be represented by a homogeneous model on all
scales. Choosing an LTB model as the most convenient inhomogeneous model for
the early stag... | [
{
"created": "Thu, 6 Sep 2007 14:43:59 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Mar 2008 16:12:22 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"McClure",
"M. L.",
""
],
[
"Hellaby",
"Charles",
""
]
] | The ultimate application of Einstein's field equations is to empirically determine the geometry of the Universe from its matter content, rather than simply assuming the Universe can be represented by a homogeneous model on all scales. Choosing an LTB model as the most convenient inhomogeneous model for the early stages... |
2108.12366 | Andreas Lymperis | Andreas Lymperis, Spyros Basilakos and Emmanuel N. Saridakis | Modified cosmology through Kaniadakis horizon entropy | 10 pages, 5 figures | null | 10.1140/epjc/s10052-021-09852-9 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the gravity-thermodynamics conjecture, namely the first law of
thermodynamics on the Universe horizon, but using the generalized Kaniadakis
entropy instead of the standard Bekenstein-Hawking one. The former is a
one-parameter generalization of the classical Boltzmann-Gibbs-Shannon entropy,
arising from a coh... | [
{
"created": "Fri, 27 Aug 2021 15:58:31 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Dec 2021 11:35:10 GMT",
"version": "v2"
}
] | 2021-12-07 | [
[
"Lymperis",
"Andreas",
""
],
[
"Basilakos",
"Spyros",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | We apply the gravity-thermodynamics conjecture, namely the first law of thermodynamics on the Universe horizon, but using the generalized Kaniadakis entropy instead of the standard Bekenstein-Hawking one. The former is a one-parameter generalization of the classical Boltzmann-Gibbs-Shannon entropy, arising from a coher... |
1309.0411 | M Blagojevi\'c | M. Blagojevic and B. Cvetkovic | 3D gravity with propagating torsion: Hamiltonian structure of the scalar
sector | LaTeX, 26 pages | Phys.Rev. D88 (2013) 104032 | 10.1103/PhysRevD.88.104032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Hamiltonian structure of the general parity-invariant model of
three-dimensional gravity with propagating torsion, with eight parameters in
the Lagrangian. In the scalar sector, containing scalar or pseudoscalar modes
with respect to maximally symmetric background, the phenomenon of constraint
bifurcatio... | [
{
"created": "Mon, 2 Sep 2013 14:01:41 GMT",
"version": "v1"
}
] | 2013-12-09 | [
[
"Blagojevic",
"M.",
""
],
[
"Cvetkovic",
"B.",
""
]
] | We study the Hamiltonian structure of the general parity-invariant model of three-dimensional gravity with propagating torsion, with eight parameters in the Lagrangian. In the scalar sector, containing scalar or pseudoscalar modes with respect to maximally symmetric background, the phenomenon of constraint bifurcation ... |
0804.0296 | Nobuyuki Kanda | Ryota Honda, Shougo Yamagishi, Nobuyuki Kanda and TAMA collaboration | Time-frequency clustering for burst gravitational waves search in
TAMA300 data | 10 pages, 8 fugures, 12th GWDAW (Gravitational Wave Data Analysis
Workshop) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have developed a method 'time-frequency (TF) clustering' to find the burst
gravitational waves for TAMA data analysis. TF clustering method on sonogram
(spectrogram) shows some characteristics of short duration signal. Using
parameters which represent the cluster shape, we can efficiently identify some
predicted g... | [
{
"created": "Wed, 2 Apr 2008 07:33:26 GMT",
"version": "v1"
}
] | 2008-04-03 | [
[
"Honda",
"Ryota",
""
],
[
"Yamagishi",
"Shougo",
""
],
[
"Kanda",
"Nobuyuki",
""
],
[
"collaboration",
"TAMA",
""
]
] | We have developed a method 'time-frequency (TF) clustering' to find the burst gravitational waves for TAMA data analysis. TF clustering method on sonogram (spectrogram) shows some characteristics of short duration signal. Using parameters which represent the cluster shape, we can efficiently identify some predicted gra... |
1106.3106 | Sergio Dain | Sergio Dain | Axially symmetric spacetimes: numerical and analytical perspectives | To appear in the proceedings of the Spanish Relativity Meeting
(ERE2010). Plenary Talk | J.Phys.Conf.Ser.314:012015,2011 | 10.1088/1742-6596/314/1/012015 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Some new aspects of axially symmetric spacetimes are discussed. These results
open the door for future interplay between analytical and numerical studies.
The new developments are based on the role of the total mass in axial symmetry.
Finally, a list of relevant open problems is presented. These problems can be
hopef... | [
{
"created": "Wed, 15 Jun 2011 21:36:39 GMT",
"version": "v1"
}
] | 2011-09-28 | [
[
"Dain",
"Sergio",
""
]
] | Some new aspects of axially symmetric spacetimes are discussed. These results open the door for future interplay between analytical and numerical studies. The new developments are based on the role of the total mass in axial symmetry. Finally, a list of relevant open problems is presented. These problems can be hopeful... |
gr-qc/9801069 | Luis Lehner | The Binary Black Hole Grand Challenge Alliance: R.Gomez, L.Lehner, R.
Marsa, J.Winicour, A.Abrahams, A.Anderson, P.Anninos, T.Baumgarte, N.Bishop,
S.Brandt J.Browne, K.Camarda, M.Choptuik, R.Correl, G.Cook, C.Evans, L.Finn,
G.Fox, T.Haupt, M.Huq, L.Kidder, S.Klasky, P.Laguna, W.Landry, J.Lenaghan,
J.Masso, R.A.... | Stable characteristic evolution of generic 3-dimensional
single-black-hole spacetimes | 4 pages, 3 figures | Phys.Rev.Lett.80:3915-3918,1998 | 10.1103/PhysRevLett.80.3915 | null | gr-qc | null | We report new results which establish that the accurate 3-dimensional
numerical simulation of generic single-black-hole spacetimes has been achieved
by characteristic evolution with unlimited long term stability. Our results
cover a selection of distorted, moving and spinning single black holes, with
evolution times ... | [
{
"created": "Tue, 20 Jan 1998 22:07:31 GMT",
"version": "v1"
}
] | 2012-08-27 | [
[
"Alliance",
"The Binary Black Hole Grand Challenge",
""
],
[
":",
"",
""
],
[
"Gomez",
"R.",
""
],
[
"Lehner",
"L.",
""
],
[
"Marsa",
"R.",
""
],
[
"Winicour",
"J.",
""
],
[
"Abrahams",
"A.",
""
],
[
... | We report new results which establish that the accurate 3-dimensional numerical simulation of generic single-black-hole spacetimes has been achieved by characteristic evolution with unlimited long term stability. Our results cover a selection of distorted, moving and spinning single black holes, with evolution times up... |
1008.4093 | Etera R. Livine | Mait\'e Dupuis, Etera R. Livine | Lifting SU(2) Spin Networks to Projected Spin Networks | 14 pages | Phys.Rev.D82:064044,2010 | 10.1103/PhysRevD.82.064044 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Projected spin network states are the canonical basis of quantum states of
geometry for the most recent EPR-FK spinfoam models for quantum gravity. They
are functionals of both the Lorentz connection and the time normal field. We
analyze in details the map from these projected spin networks to the standard
SU(2) spin... | [
{
"created": "Tue, 24 Aug 2010 17:36:08 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Dupuis",
"Maité",
""
],
[
"Livine",
"Etera R.",
""
]
] | Projected spin network states are the canonical basis of quantum states of geometry for the most recent EPR-FK spinfoam models for quantum gravity. They are functionals of both the Lorentz connection and the time normal field. We analyze in details the map from these projected spin networks to the standard SU(2) spin n... |
gr-qc/0603097 | Alessandro Pesci | Alessandro Pesci | Mass and temperature limits for blackbody radiation | 11 pages, 7 figures | null | null | null | gr-qc | null | A spherically symmetric distribution of classical blackbody radiation is
considered, at conditions in which gravitational self-interaction effects
become not negligible. Static solutions to Einstein field equations are
searched for, for each choice of the assumed central energy density. Spherical
cavities at thermody... | [
{
"created": "Fri, 24 Mar 2006 15:15:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pesci",
"Alessandro",
""
]
] | A spherically symmetric distribution of classical blackbody radiation is considered, at conditions in which gravitational self-interaction effects become not negligible. Static solutions to Einstein field equations are searched for, for each choice of the assumed central energy density. Spherical cavities at thermodyna... |
1508.02044 | Florent Michel | Florent Michel and Renaud Parentani | Mode mixing in sub- and trans-critical flows over an obstacle: When
should Hawking's predictions be recovered? | 11 pages, 6 figures | null | null | LPT-Orsay-15-60 | gr-qc physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We reexamine the scattering coefficients of shallow water waves blocked by a
stationary counter current over an obstacle. By considering series of
background flows, we show that the most relevant parameter is $F_{\rm max}$,
the maximal value of the ratio of the flow velocity over the speed of low
frequency waves. For... | [
{
"created": "Sun, 9 Aug 2015 15:57:07 GMT",
"version": "v1"
}
] | 2015-08-11 | [
[
"Michel",
"Florent",
""
],
[
"Parentani",
"Renaud",
""
]
] | We reexamine the scattering coefficients of shallow water waves blocked by a stationary counter current over an obstacle. By considering series of background flows, we show that the most relevant parameter is $F_{\rm max}$, the maximal value of the ratio of the flow velocity over the speed of low frequency waves. For s... |
2405.20398 | Simone Albanesi | Simone Albanesi, Alireza Rashti, Francesco Zappa, Rossella Gamba,
William Cook, Boris Daszuta, Sebastiano Bernuzzi, Alessandro Nagar, and David
Radice | Scattering and dynamical capture of two black holes: synergies between
numerical and analytical methods | 31 pages, 18 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study initially unbound systems of two black holes using numerical
relativity (NR) simulations performed with GR-Athena++. We focus on regions of
the parameter space close to the transition from scatterings to dynamical
captures, considering equal mass and spin-aligned configurations, as well as
unequal mass and n... | [
{
"created": "Thu, 30 May 2024 18:07:46 GMT",
"version": "v1"
}
] | 2024-06-03 | [
[
"Albanesi",
"Simone",
""
],
[
"Rashti",
"Alireza",
""
],
[
"Zappa",
"Francesco",
""
],
[
"Gamba",
"Rossella",
""
],
[
"Cook",
"William",
""
],
[
"Daszuta",
"Boris",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],... | We study initially unbound systems of two black holes using numerical relativity (NR) simulations performed with GR-Athena++. We focus on regions of the parameter space close to the transition from scatterings to dynamical captures, considering equal mass and spin-aligned configurations, as well as unequal mass and non... |
1803.10074 | Jian-Yang Zhu | Xi-Bin Li, He Wang, and Jian-Yang Zhu | Gravitational wave from warm inflation | 11 pages, 2 figures | Physical Review D 97, 063516 (2018) | 10.1103/PhysRevD.97.063516 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A fundamental prediction of inflation is a nearly scale-invariant spectrum of
gravitational wave. The features of such a signal provide extremely important
information about the physics of the early universe. In this paper, we focus on
several topics about warm inflation. First, we discuss the stability property
abou... | [
{
"created": "Tue, 27 Mar 2018 13:42:01 GMT",
"version": "v1"
}
] | 2018-04-04 | [
[
"Li",
"Xi-Bin",
""
],
[
"Wang",
"He",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | A fundamental prediction of inflation is a nearly scale-invariant spectrum of gravitational wave. The features of such a signal provide extremely important information about the physics of the early universe. In this paper, we focus on several topics about warm inflation. First, we discuss the stability property about ... |
gr-qc/0410099 | A. I. Nikishov | A.I.Nikishov | Problems in field theoretical approach to gravitation | 11 pages, LATEX 2e, no figures | null | null | null | gr-qc | null | We consider gravitational self interaction in the lowest approximation and
assume that graviton interacts with gravitational energy-momentum tensor in the
same way as it interacts with particles. We show that, using gravitational
vertex with a preferred gravitational energy-momentum tensor, it is possible to
obtain a... | [
{
"created": "Wed, 20 Oct 2004 11:57:35 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Nikishov",
"A. I.",
""
]
] | We consider gravitational self interaction in the lowest approximation and assume that graviton interacts with gravitational energy-momentum tensor in the same way as it interacts with particles. We show that, using gravitational vertex with a preferred gravitational energy-momentum tensor, it is possible to obtain a m... |
1311.5091 | Nikolaos Batakis Professor | Nikolaos A. Batakis | Geons found include non-susy CDM particle and non-singular "Kerr-Newman"
models | 9 pages, 1 figure | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The antisoliton-soliton {\cal G}={\cal S_-}\!\vee{\cal S_+} neutral state is
a proper geon in a family of stable squashed-S^3\times\IR pp-wave electrovacua
along a primordial Q/r^2 field. With {\cal S_-} propagating backwards in time,
the dominant EM field is that of an effective electric-dipole moment {\sf p}.
If di... | [
{
"created": "Tue, 19 Nov 2013 16:37:52 GMT",
"version": "v1"
}
] | 2013-11-21 | [
[
"Batakis",
"Nikolaos A.",
""
]
] | The antisoliton-soliton {\cal G}={\cal S_-}\!\vee{\cal S_+} neutral state is a proper geon in a family of stable squashed-S^3\times\IR pp-wave electrovacua along a primordial Q/r^2 field. With {\cal S_-} propagating backwards in time, the dominant EM field is that of an effective electric-dipole moment {\sf p}. If disj... |
1607.00003 | Shahar Hod | Shahar Hod | The large-mass limit of cloudy black holes | 21 pages. Invited contribution to the Focus Issue on "Black holes and
fundamental fields", Classical and Quantum Gravity | Classical and Quantum Gravity 32, 134002 (2015) | 10.1088/0264-9381/32/13/134002 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The interplay between black holes and fundamental fields has attracted much
attention over the years from both physicists and mathematicians. In this paper
we study {\it analytically} a physical system which is composed of massive
scalar fields linearly coupled to a rapidly-rotating Kerr black hole. Using
simple argu... | [
{
"created": "Thu, 30 Jun 2016 20:00:04 GMT",
"version": "v1"
}
] | 2016-07-06 | [
[
"Hod",
"Shahar",
""
]
] | The interplay between black holes and fundamental fields has attracted much attention over the years from both physicists and mathematicians. In this paper we study {\it analytically} a physical system which is composed of massive scalar fields linearly coupled to a rapidly-rotating Kerr black hole. Using simple argume... |
0811.0993 | Mauricio Bellini | Federico Agustin Membiela and Mauricio Bellini | Primordial large-scale electromagnetic fields from
Gravitoelectromagnetic Inflation | Accepted for publication in Physics Letters B | Phys.Lett.B674:152-159,2009 | 10.1016/j.physletb.2009.03.027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the origin and evolution of primordial electric and magnetic
fields in the early universe, when the expansion is governed by a cosmological
constant $\Lambda_0$. Using the gravitoelectromagnetic inflationary formalism
with $A_0=0$, we obtain the power of spectrums for large-scale magnetic fields
and th... | [
{
"created": "Thu, 6 Nov 2008 17:01:03 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Feb 2009 19:51:13 GMT",
"version": "v2"
},
{
"created": "Wed, 18 Mar 2009 11:09:44 GMT",
"version": "v3"
}
] | 2009-04-06 | [
[
"Membiela",
"Federico Agustin",
""
],
[
"Bellini",
"Mauricio",
""
]
] | We investigate the origin and evolution of primordial electric and magnetic fields in the early universe, when the expansion is governed by a cosmological constant $\Lambda_0$. Using the gravitoelectromagnetic inflationary formalism with $A_0=0$, we obtain the power of spectrums for large-scale magnetic fields and the ... |
0906.2519 | Abdelmoumene Belabbas moumene | A. Belabbas | Les potentiels non gravitationnels et la structure de l'espace-temps | 104 pages, 3 figures, Magister Thesis, text in french, University of
Bejaia (Algeria) | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The subject of this dissertation consists in analyzing a recent proposition,
advanced by C.C.Barros, in which the non gravitational interactions can affect
the space-time metric as in gravity. In fact, in the context of the
Schwarzschild solution, the hydrogen atom is described in a completely new way
: instead of fo... | [
{
"created": "Sun, 14 Jun 2009 07:25:23 GMT",
"version": "v1"
}
] | 2009-06-17 | [
[
"Belabbas",
"A.",
""
]
] | The subject of this dissertation consists in analyzing a recent proposition, advanced by C.C.Barros, in which the non gravitational interactions can affect the space-time metric as in gravity. In fact, in the context of the Schwarzschild solution, the hydrogen atom is described in a completely new way : instead of foll... |
1902.00074 | J Erik Baxter | J. Erik Baxter | Globally regular solutions to dyonic anti-de Sitter
$\mathfrak{su}(\infty)$ Einstein-Yang-Mills theory -- Existence and
characterising charges | 34 pages; 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we find new static, spherically symmetric, dyonic, globally
regular exact solutions to $\mathfrak{su}(\infty)$ Einstein-Yang-Mills theory
with a negative cosmological constant $\Lambda$, in the regime that $|\Lambda|$
is very large. In this regime, we also prove that dyonic globally regular
solutions ma... | [
{
"created": "Thu, 31 Jan 2019 21:15:39 GMT",
"version": "v1"
}
] | 2019-02-04 | [
[
"Baxter",
"J. Erik",
""
]
] | In this work, we find new static, spherically symmetric, dyonic, globally regular exact solutions to $\mathfrak{su}(\infty)$ Einstein-Yang-Mills theory with a negative cosmological constant $\Lambda$, in the regime that $|\Lambda|$ is very large. In this regime, we also prove that dyonic globally regular solutions may ... |
gr-qc/9612061 | Alexander Unzicker | Alexander Unzicker | Teleparallel Space-Time with Defects yields Geometrization of
Electrodynamics with quantized Charges | Major revision, 1 figure and 3 subsections added, 20 Pages, 2 tables,
5 figures | null | null | null | gr-qc hep-th | null | In the present paper a geometrization of electrodynamics is proposed which
makes use of a generalization of Riemannian geometry considered already by
Einstein and Cartan in the 20ies. Cartan's differential forms description of a
teleparallel space-time with torsion is modified by introducing distortion
1-forms which ... | [
{
"created": "Fri, 20 Dec 1996 21:36:34 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Oct 1997 12:50:33 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Unzicker",
"Alexander",
""
]
] | In the present paper a geometrization of electrodynamics is proposed which makes use of a generalization of Riemannian geometry considered already by Einstein and Cartan in the 20ies. Cartan's differential forms description of a teleparallel space-time with torsion is modified by introducing distortion 1-forms which co... |
2404.02243 | Patrick Vecera | Samuel J. Brensinger and Patrick Vecera | Geometrical Heavy Lifting: Yang-Mills, Spin, and Torsion in Dynamical
Projective Gravitation | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Thomas-Whitehead (TW) gravity is a gauge theory of gravitation based on
projective geometry. The theory maintains projective symmetry through the TW
connection, an affine connection over the volume bundle of the spacetime
manifold. TW gravity obtains dynamics through Lovelock expansions in the action
while preserving... | [
{
"created": "Tue, 2 Apr 2024 19:03:48 GMT",
"version": "v1"
}
] | 2024-04-04 | [
[
"Brensinger",
"Samuel J.",
""
],
[
"Vecera",
"Patrick",
""
]
] | Thomas-Whitehead (TW) gravity is a gauge theory of gravitation based on projective geometry. The theory maintains projective symmetry through the TW connection, an affine connection over the volume bundle of the spacetime manifold. TW gravity obtains dynamics through Lovelock expansions in the action while preserving g... |
gr-qc/0403014 | Naoki Seto | Naoki Seto | Annual modulation of the Galactic binary confusion noise bakground and
LISA data analysis | 13 pages, 6 figures | Phys.Rev. D69 (2004) 123005 | 10.1103/PhysRevD.69.123005 | null | gr-qc astro-ph | null | We study the anisotropies of the Galactic confusion noise background and its
effects on LISA data analysis. LISA has two data streams of the gravitational
waves signals relevant for low frequency regime. Due to the anisotropies of the
background, the matrix for their confusion noises has off-diagonal components
and d... | [
{
"created": "Tue, 2 Mar 2004 21:57:51 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Seto",
"Naoki",
""
]
] | We study the anisotropies of the Galactic confusion noise background and its effects on LISA data analysis. LISA has two data streams of the gravitational waves signals relevant for low frequency regime. Due to the anisotropies of the background, the matrix for their confusion noises has off-diagonal components and dep... |
1903.00323 | Daphne O. Klemme | Vincent Moncrief and Puskar Mondal | Could the Universe have an Exotic Topology? | 43 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A recent article uncovered a surprising dynamical mechanism at work within
the (vacuum) Einstein `flow' that strongly suggests that many closed
3-manifolds that do not admit a locally homogeneous and isotropic metric
\textit{at all} will nevertheless evolve, under Einsteinian evolution, in such
a way as to be \textit... | [
{
"created": "Fri, 1 Mar 2019 14:41:15 GMT",
"version": "v1"
}
] | 2019-03-04 | [
[
"Moncrief",
"Vincent",
""
],
[
"Mondal",
"Puskar",
""
]
] | A recent article uncovered a surprising dynamical mechanism at work within the (vacuum) Einstein `flow' that strongly suggests that many closed 3-manifolds that do not admit a locally homogeneous and isotropic metric \textit{at all} will nevertheless evolve, under Einsteinian evolution, in such a way as to be \textit{a... |
1605.01103 | Rana X. Adhikari | Evan D. Hall, Thomas Callister Valery V. Frolov, Holger M\"uller,
Maxim Pospelov, Rana X Adhikari | Laser Interferometers as Dark Matter Detectors | null | Phys. Rev. D 98, 083019 (2018) | 10.1103/PhysRevD.98.083019 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | While global cosmological and local galactic abundance of dark matter is well
established, its identity, physical size and composition remain a mystery. In
this paper, we analyze an important question of dark matter detectability
through its gravitational interaction, using current and next generation
gravitational-w... | [
{
"created": "Tue, 3 May 2016 21:56:12 GMT",
"version": "v1"
}
] | 2018-10-31 | [
[
"Hall",
"Evan D.",
""
],
[
"Frolov",
"Thomas Callister Valery V.",
""
],
[
"Müller",
"Holger",
""
],
[
"Pospelov",
"Maxim",
""
],
[
"Adhikari",
"Rana X",
""
]
] | While global cosmological and local galactic abundance of dark matter is well established, its identity, physical size and composition remain a mystery. In this paper, we analyze an important question of dark matter detectability through its gravitational interaction, using current and next generation gravitational-wav... |
1611.03985 | Marcelo J. Reboucas | Janilo Santos, Marcelo J. Reboucas, Ant\^onio F.F. Teixeira | Homogeneous G\"odel-type solutions in hybrid metric-Palatini gravity | V2: Presentation of Sec.4 substantially improved, references added,
version published in Eur.Phys.J.C | Eur.Phys.J. C 78 (2018) 567 | 10.1140/epjc/s10052-018-6025-4 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | [Abridged] If gravitation is to be described by a hybrid metric-Palatini
$f(\mathcal{R})$ gravity theory there are a number of issues that ought to be
examined in its context, including the question as to whether its equations
allow homogeneous G\"odel-type solutions, which necessarily leads to violation
of causality... | [
{
"created": "Sat, 12 Nov 2016 11:07:23 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Mar 2017 20:22:11 GMT",
"version": "v2"
},
{
"created": "Sat, 14 Jul 2018 19:00:34 GMT",
"version": "v3"
}
] | 2018-07-17 | [
[
"Santos",
"Janilo",
""
],
[
"Reboucas",
"Marcelo J.",
""
],
[
"Teixeira",
"Antônio F. F.",
""
]
] | [Abridged] If gravitation is to be described by a hybrid metric-Palatini $f(\mathcal{R})$ gravity theory there are a number of issues that ought to be examined in its context, including the question as to whether its equations allow homogeneous G\"odel-type solutions, which necessarily leads to violation of causality. ... |
1103.0976 | Morgan Le Delliou | Morgan Le Delliou (CFTC, IFT), Filipe C. Mena (CMAT), Jos\'e Pedro
Mimoso (DFUL, CAAUL) | The role of shell crossing on the existence and stability of trapped
matter shells in spherical inhomogeneous \Lambda-CDM models | 17pp 12figs | Phys.Rev.D83:103528,2011 | 10.1103/PhysRevD.83.103528 | IFT-UAM/CSIC-09-24 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyse the dynamics of trapped matter shells in spherically symmetric
inhomogeneous \Lambda-CDM models. The investigation uses a Generalised
Lema\^itre-Tolman-Bondi description with initial conditions subject to the
constraints of having spatially asymptotic cosmological expansion, initial
Hubble-type flow and a ... | [
{
"created": "Fri, 4 Mar 2011 20:28:01 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Mar 2011 07:32:45 GMT",
"version": "v2"
}
] | 2011-06-07 | [
[
"Delliou",
"Morgan Le",
"",
"CFTC, IFT"
],
[
"Mena",
"Filipe C.",
"",
"CMAT"
],
[
"Mimoso",
"José Pedro",
"",
"DFUL, CAAUL"
]
] | We analyse the dynamics of trapped matter shells in spherically symmetric inhomogeneous \Lambda-CDM models. The investigation uses a Generalised Lema\^itre-Tolman-Bondi description with initial conditions subject to the constraints of having spatially asymptotic cosmological expansion, initial Hubble-type flow and a re... |
1912.06495 | Majid Abdollahi Zadeh | M. Abdollahi Zadeh | New Tsallis agegraphic Dark Energy in Horava-Lifshitz cosmology | 10 pages, 21 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the new Tsallis agegraphic dark energy (NTADE) scenario in the
framework of Horava-Lifshitz cosmology. Considering interacting and
non-interacting scenarios of NTADE with dark matter in a spatially non-flat
universe, we investigate the cosmological implications of this model in detail.
We obtain the di... | [
{
"created": "Thu, 12 Dec 2019 07:16:52 GMT",
"version": "v1"
},
{
"created": "Fri, 10 Jan 2020 06:30:26 GMT",
"version": "v2"
},
{
"created": "Tue, 21 Jan 2020 06:23:37 GMT",
"version": "v3"
}
] | 2020-01-22 | [
[
"Zadeh",
"M. Abdollahi",
""
]
] | We investigate the new Tsallis agegraphic dark energy (NTADE) scenario in the framework of Horava-Lifshitz cosmology. Considering interacting and non-interacting scenarios of NTADE with dark matter in a spatially non-flat universe, we investigate the cosmological implications of this model in detail. We obtain the diff... |
1110.0928 | Dong-han Yeom | Dong-il Hwang, Bum-Hoon Lee, Dong-han Yeom | Mass inflation in f(R) gravity: A conjecture on the resolution of the
mass inflation singularity | 31 pages, 15 figures | JCAP 1112:006,2011 | 10.1088/1475-7516/2011/12/006 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study gravitational collapse of a charged black hole in f(R) gravity using
double-null formalism. We require cosmological stability to f(R) models; we
used the Starobinsky model and the R + (1/2)cR^2 model. Charged black holes in
f(R) gravity can have a new type of singularity due to higher curvature
corrections, ... | [
{
"created": "Wed, 5 Oct 2011 09:01:47 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Dec 2011 02:11:07 GMT",
"version": "v2"
}
] | 2015-05-30 | [
[
"Hwang",
"Dong-il",
""
],
[
"Lee",
"Bum-Hoon",
""
],
[
"Yeom",
"Dong-han",
""
]
] | We study gravitational collapse of a charged black hole in f(R) gravity using double-null formalism. We require cosmological stability to f(R) models; we used the Starobinsky model and the R + (1/2)cR^2 model. Charged black holes in f(R) gravity can have a new type of singularity due to higher curvature corrections, th... |
0912.3244 | Gabriele Veneziano | M. Gasperini, G. Marozzi, G. Veneziano | A covariant and gauge invariant formulation of the cosmological
"backreaction" | 12 pages, no figures. Typos corrected, matches version to appear in
JCAP | JCAP 1002:009,2010 | 10.1088/1475-7516/2010/02/009 | BA-TH/623-09, CERN-PH-TH/2009-249 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using our recent proposal for defining gauge invariant averages we give a
general-covariant formulation of the so-called cosmological "backreaction". Our
effective covariant equations allow us to describe in explicitly gauge
invariant form the way classical or quantum inhomogeneities affect the average
evolution of o... | [
{
"created": "Wed, 16 Dec 2009 20:37:14 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Feb 2010 16:38:55 GMT",
"version": "v2"
}
] | 2010-04-14 | [
[
"Gasperini",
"M.",
""
],
[
"Marozzi",
"G.",
""
],
[
"Veneziano",
"G.",
""
]
] | Using our recent proposal for defining gauge invariant averages we give a general-covariant formulation of the so-called cosmological "backreaction". Our effective covariant equations allow us to describe in explicitly gauge invariant form the way classical or quantum inhomogeneities affect the average evolution of our... |
2311.09171 | Alan Barnes | Alan Barnes | Harada-Maxwell Static Spherically Symmetric Spacetimes | PDFLaTeX 7 pages. Added a paragraph to dicuss previously overlooked
case c=-1, added page numbers to ref[9]. arXiv admin note: text overlap with
arXiv:2309.05336 | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Very recently Harada has proposed a gravitational theory which is of third
order in the derivatives of the metric tensor with the property that any
solution of Einstein's field equations (EFEs) possibly with a cosmological
constant is necessarily a solution of the new theory. Remarkably he showed that
even in a matte... | [
{
"created": "Wed, 15 Nov 2023 18:09:24 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Nov 2023 17:43:21 GMT",
"version": "v2"
}
] | 2023-11-21 | [
[
"Barnes",
"Alan",
""
]
] | Very recently Harada has proposed a gravitational theory which is of third order in the derivatives of the metric tensor with the property that any solution of Einstein's field equations (EFEs) possibly with a cosmological constant is necessarily a solution of the new theory. Remarkably he showed that even in a matter-... |
gr-qc/0205076 | Dr. S. Biswas | S.Biswas, P.Misra, I.Chowdhury | The CWKB Method of Particle Production in Periodic Potential | 17 pages, latex, 2 figures | Gen.Rel.Grav. 35 (2003) 1-16 | 10.1023/A:1021349925566 | null | gr-qc | null | In this work we study the particle production in time dependent periodic
potential using the method of complex time WKB (CWKB) approximation. In the
inflationary cosmology at the end of inflationary stage, the potential becomes
time dependent as well as periodic. Reheating occurs due to particle production
by the osc... | [
{
"created": "Fri, 17 May 2002 10:15:45 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Biswas",
"S.",
""
],
[
"Misra",
"P.",
""
],
[
"Chowdhury",
"I.",
""
]
] | In this work we study the particle production in time dependent periodic potential using the method of complex time WKB (CWKB) approximation. In the inflationary cosmology at the end of inflationary stage, the potential becomes time dependent as well as periodic. Reheating occurs due to particle production by the oscil... |
0809.4591 | Babak Vakili | Babak Vakili | Noether symmetric $f(R)$ quantum cosmology and its classical
correlations | 11 pages, 1 figure, to appear in PLB | Phys.Lett.B669:206-211,2008 | 10.1016/j.physletb.2008.09.058 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We quantize a flat FRW cosmology in the context of the $f(R)$ gravity by
Noether symmetry approach. We explicitly calculate the form of $f(R)$ for which
such symmetries exist. It is shown that the existence of a Noether symmetry
yields a general solution of the Wheeler-DeWitt equation where can be expressed
as a supe... | [
{
"created": "Fri, 26 Sep 2008 10:21:15 GMT",
"version": "v1"
}
] | 2010-04-30 | [
[
"Vakili",
"Babak",
""
]
] | We quantize a flat FRW cosmology in the context of the $f(R)$ gravity by Noether symmetry approach. We explicitly calculate the form of $f(R)$ for which such symmetries exist. It is shown that the existence of a Noether symmetry yields a general solution of the Wheeler-DeWitt equation where can be expressed as a superp... |
gr-qc/9712061 | null | Thibault Damour and Viatcheslav F. Mukhanov | Inflation without Slow Roll | 9 pages, Revtex, psfig, 1 figure, minor modifications, references
added | Phys.Rev.Lett. 80 (1998) 3440-3443 | 10.1103/PhysRevLett.80.3440 | IHES/P/97/94 | gr-qc astro-ph | null | We draw attention to the possibility that inflation (i.e. accelerated
expansion) might continue after the end of slow roll, during a period of fast
oscillations of the inflaton field \phi . This phenomenon takes place when a
mild non-convexity inequality is satisfied by the potential V(\phi). The
presence of such a p... | [
{
"created": "Fri, 12 Dec 1997 15:31:30 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Mar 1998 19:38:25 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Damour",
"Thibault",
""
],
[
"Mukhanov",
"Viatcheslav F.",
""
]
] | We draw attention to the possibility that inflation (i.e. accelerated expansion) might continue after the end of slow roll, during a period of fast oscillations of the inflaton field \phi . This phenomenon takes place when a mild non-convexity inequality is satisfied by the potential V(\phi). The presence of such a per... |
2012.01302 | Willians Barreto | M. A. Alcoforado, R. F. Aranha, W. O. Barreto, H. P. de Oliveira | Multidomain Galerkin-Collocation method: spherical collapse of scalar
fields II | 15 pages, 11 figures. Final version to appear in Classical and
Quantum Gravity | Classical and Quantum Gravity 38, 225004 (2021) | 10.1088/1361-6382/ac2c1d | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We follow the strategy initiated in Ref. [1] and proceed with the
implementation of the Galerkin-Collocation domain decomposition (GCDD) applied
to the dynamics of a spherical self-gravitating scalar field with the field
equation in the Cauchy formulation. We have adopted the areal slicing gauge. We
have presented a ... | [
{
"created": "Wed, 2 Dec 2020 16:14:00 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Sep 2021 15:33:09 GMT",
"version": "v2"
}
] | 2021-10-22 | [
[
"Alcoforado",
"M. A.",
""
],
[
"Aranha",
"R. F.",
""
],
[
"Barreto",
"W. O.",
""
],
[
"de Oliveira",
"H. P.",
""
]
] | We follow the strategy initiated in Ref. [1] and proceed with the implementation of the Galerkin-Collocation domain decomposition (GCDD) applied to the dynamics of a spherical self-gravitating scalar field with the field equation in the Cauchy formulation. We have adopted the areal slicing gauge. We have presented a de... |
gr-qc/9510010 | Atsushi Taruya | Atsushi Taruya and Yasusada Nambu | Application of gradient expansion to non-linear gravitational wave in
plane-symmetric universe | 26 pages, gzip and uuencoded postscript file | Prog.Theor.Phys. 95 (1996) 295-311 | 10.1143/PTP.95.295 | DPNU-95-34 | gr-qc astro-ph | null | As an application of Gradient Expansion (long-wavelength) approximation, we
studied the inhomogeneous universe including the gravitational wave(GW). For a
plane-symmetric cosmological model, we could implement the 2nd order expansion
and analyze the purely non-linear perturbation of GW. The result indicates that
the ... | [
{
"created": "Fri, 6 Oct 1995 13:15:20 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Taruya",
"Atsushi",
""
],
[
"Nambu",
"Yasusada",
""
]
] | As an application of Gradient Expansion (long-wavelength) approximation, we studied the inhomogeneous universe including the gravitational wave(GW). For a plane-symmetric cosmological model, we could implement the 2nd order expansion and analyze the purely non-linear perturbation of GW. The result indicates that the no... |
1706.04227 | Edgar Gasperin | Edgar Gasperin and Juan A. Valiente Kroon | Polyhomogeneous expansions from time symmetric initial data | 29 Pages, 2 Figures | null | 10.1088/1361-6382/aa87bf | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We make use of Friedrich's construction of the cylinder at spatial infinity
to relate the logarithmic terms appearing in asymptotic expansions of
components of the Weyl tensor to the freely specifiable parts of time symmetric
initial data sets for the Einstein field equations. Our analysis is based on
the assumption ... | [
{
"created": "Tue, 13 Jun 2017 19:04:21 GMT",
"version": "v1"
}
] | 2017-09-27 | [
[
"Gasperin",
"Edgar",
""
],
[
"Kroon",
"Juan A. Valiente",
""
]
] | We make use of Friedrich's construction of the cylinder at spatial infinity to relate the logarithmic terms appearing in asymptotic expansions of components of the Weyl tensor to the freely specifiable parts of time symmetric initial data sets for the Einstein field equations. Our analysis is based on the assumption th... |
gr-qc/0603041 | Sebastian Szybka | Piotr T. Chrusciel, Gert-Martin Greuel, Reinhard Meinel, Sebastian J.
Szybka | The Ernst equation and ergosurfaces | 23 pages, 4 figures; misprints corrected | Class.Quant.Grav.23:4399-4414,2006 | 10.1088/0264-9381/23/13/007 | AEI-2006-014 | gr-qc | null | We show that analytic solutions $\mcE$ of the Ernst equation with non-empty
zero-level-set of $\Re \mcE$ lead to smooth ergosurfaces in space-time. In
fact, the space-time metric is smooth near a "Ernst ergosurface" $E_f$ if and
only if $\mcE$ is smooth near $E_f$ and does not have zeros of infinite order
there.
| [
{
"created": "Mon, 13 Mar 2006 01:56:31 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Jun 2006 23:40:45 GMT",
"version": "v2"
}
] | 2010-12-23 | [
[
"Chrusciel",
"Piotr T.",
""
],
[
"Greuel",
"Gert-Martin",
""
],
[
"Meinel",
"Reinhard",
""
],
[
"Szybka",
"Sebastian J.",
""
]
] | We show that analytic solutions $\mcE$ of the Ernst equation with non-empty zero-level-set of $\Re \mcE$ lead to smooth ergosurfaces in space-time. In fact, the space-time metric is smooth near a "Ernst ergosurface" $E_f$ if and only if $\mcE$ is smooth near $E_f$ and does not have zeros of infinite order there. |
2010.07896 | Dennis Stock | Dennis Stock | Applications of the Hawking Energy in Inhomogeneous Cosmology | matches published version | Class. Quant. Grav. 38.7, 075019 (2021) | 10.1088/1361-6382/abe882 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The past lightcone of an observer in a cosmological spacetime is the unique
geometric structure directly linked to observations. After general properties
of the Hawking energy along slices of the past lightcone have previously been
studied, the present work continues along this path by providing explicit
cosmological... | [
{
"created": "Thu, 15 Oct 2020 17:21:36 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Dec 2020 10:40:56 GMT",
"version": "v2"
},
{
"created": "Fri, 26 Mar 2021 08:29:38 GMT",
"version": "v3"
}
] | 2021-03-29 | [
[
"Stock",
"Dennis",
""
]
] | The past lightcone of an observer in a cosmological spacetime is the unique geometric structure directly linked to observations. After general properties of the Hawking energy along slices of the past lightcone have previously been studied, the present work continues along this path by providing explicit cosmological a... |
1211.1558 | Tanwi Bandyopadhyay | Tanwi Bandyopadhyay, Ujjal Debnath, Mubasher Jamil, Faiz-ur-Rahman and
Ratbay Myrzakulov | Thermodynamics of an Evolving Lorentzian Wormhole with Entropy
Corrections | 7 pages, 3 figures | Int. J. Theor. Phys. 54: 1750-1761 (2015) | 10.1007/s10773-014-2378-0 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we study the generalized second law of thermodynamics (GSL) at
the apparent horizon of an evolving Lorentzian wormhole. We obtain the
expressions of thermal variables at the apparent horizon. Choosing the two
well-known entropy functions i.e. power-law and logarithmic, we obtain the
expressions of GSL. ... | [
{
"created": "Sun, 4 Nov 2012 06:29:32 GMT",
"version": "v1"
}
] | 2015-06-30 | [
[
"Bandyopadhyay",
"Tanwi",
""
],
[
"Debnath",
"Ujjal",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Faiz-ur-Rahman",
"",
""
],
[
"Myrzakulov",
"Ratbay",
""
]
] | In this work, we study the generalized second law of thermodynamics (GSL) at the apparent horizon of an evolving Lorentzian wormhole. We obtain the expressions of thermal variables at the apparent horizon. Choosing the two well-known entropy functions i.e. power-law and logarithmic, we obtain the expressions of GSL. We... |
0912.1222 | Rakhi R | R. Rakhi, G.V. Vijayagovindan, K. Indulekha | A Cosmological Model with Fermionic Field | 12 Pages, 7 Figures | Int.J.Mod.Phys.A25:2735-2746,2010 | 10.1142/S0217751X10049025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, a cosmological model inspired by string/M- theory with
fermionic field is taken into consideration. Here it is investigated whether
the introduction of a non-Dirac fermionic field--characterized by an
\textit{interaction term}--affects the cosmological evolution. The
self-interaction potential is consid... | [
{
"created": "Mon, 7 Dec 2009 12:55:13 GMT",
"version": "v1"
}
] | 2011-04-26 | [
[
"Rakhi",
"R.",
""
],
[
"Vijayagovindan",
"G. V.",
""
],
[
"Indulekha",
"K.",
""
]
] | In this work, a cosmological model inspired by string/M- theory with fermionic field is taken into consideration. Here it is investigated whether the introduction of a non-Dirac fermionic field--characterized by an \textit{interaction term}--affects the cosmological evolution. The self-interaction potential is consider... |
1710.08013 | Alexei Zayats | Alexander B. Balakin, Alexei E. Zayats | Non-minimal Einstein-Maxwell theory: the Fresnel equation and the Petrov
classification of a trace-free susceptibility tensor | 20 pages, 8 figures, final version | Class. Quantum Grav. 35: 065006, 2018 | 10.1088/1361-6382/aaaa60 | null | gr-qc hep-th physics.optics | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a classification of dispersion relations for the electromagnetic
waves non-minimally coupled to the space-time curvature, based on the analysis
of the susceptibility tensor, which appears in the non-minimal Einstein-Maxwell
theory. We classify solutions to the Fresnel equation for the model with a
trace-... | [
{
"created": "Sun, 22 Oct 2017 21:00:30 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Feb 2018 09:20:36 GMT",
"version": "v2"
}
] | 2018-02-13 | [
[
"Balakin",
"Alexander B.",
""
],
[
"Zayats",
"Alexei E.",
""
]
] | We construct a classification of dispersion relations for the electromagnetic waves non-minimally coupled to the space-time curvature, based on the analysis of the susceptibility tensor, which appears in the non-minimal Einstein-Maxwell theory. We classify solutions to the Fresnel equation for the model with a trace-fr... |
gr-qc/9409008 | Bill Unruh | W. G. Unruh (Univ. of BC) | Dumb Holes and the Effects of High Frequencies on Black Hole Evaporation | This paper is being replaced to include figures, so that lanl can tex
the paper and produce a ps version. The paper was published in Phys. Rev. D
51, 2827-2838 (1995) | null | 10.1103/PhysRevD.51.2827 | null | gr-qc | null | The naive calculation of black hole evaporation makes the thermal emission
depend on the arbitrary high frequency behaviour of the theory where the theory
is certainly wrong. Using the sonic analog to black holes-- dumb holes-- I show
numerically that a change in the dispersion relation at high frequencies does
not s... | [
{
"created": "Tue, 6 Sep 1994 01:32:00 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Oct 1999 01:54:19 GMT",
"version": "v2"
}
] | 2009-10-22 | [
[
"Unruh",
"W. G.",
"",
"Univ. of BC"
]
] | The naive calculation of black hole evaporation makes the thermal emission depend on the arbitrary high frequency behaviour of the theory where the theory is certainly wrong. Using the sonic analog to black holes-- dumb holes-- I show numerically that a change in the dispersion relation at high frequencies does not see... |
1710.08712 | Diego Rubiera-Garcia | Gonzalo J. Olmo, Diego Rubiera-Garcia, Antonio Sanchez-Puente | Accelerated observers and the notion of singular spacetime | 11 pages, 1 figure, revtex4-1 style; appendix added; significant
changes in section III; minor changes in sections I and IV; appendix added;
Accepted for publication on Class. Quant. Grav | null | 10.1088/1361-6382/aaa849 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Geodesic completeness is typically regarded as a basic criterion to determine
whether a given spacetime is regular or singular. However, the principle of
general covariance does not privilege any family of observers over the others
and, therefore, observers with arbitrary motions should be able to provide a
complete ... | [
{
"created": "Tue, 24 Oct 2017 11:29:50 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Jan 2018 14:14:15 GMT",
"version": "v2"
}
] | 2018-03-14 | [
[
"Olmo",
"Gonzalo J.",
""
],
[
"Rubiera-Garcia",
"Diego",
""
],
[
"Sanchez-Puente",
"Antonio",
""
]
] | Geodesic completeness is typically regarded as a basic criterion to determine whether a given spacetime is regular or singular. However, the principle of general covariance does not privilege any family of observers over the others and, therefore, observers with arbitrary motions should be able to provide a complete ph... |
1110.4251 | Janusz Garecki Prof | Janusz Garecki (Institute of Mathematics, University of Szczecin,
Szczecin, Poland, EU) | Is torsion needed in a theory of gravity? A reappraisal | Revtex, 24 pages. The paper is written Lecture delivered at {\it
Hypercomplex Seminar 2011} in B\c{e}dlewo, Poland, 23-30 Juky 2011. The
Lecture was an extended and updated version of our old Lectures and an
article published in 2004 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is known that General Relativity ({\bf GR}) uses a Lorentzian Manifold
$(M_4;g)$ as a geometrical model of the physical spacetime. The metric $g$ is
required to satisfy Einstein's equations. Since the 1960s many authors have
tried to generalize this model by introducing torsion. In this paper we discuss
the presen... | [
{
"created": "Wed, 19 Oct 2011 12:07:15 GMT",
"version": "v1"
}
] | 2011-10-20 | [
[
"Garecki",
"Janusz",
"",
"Institute of Mathematics, University of Szczecin,\n Szczecin, Poland, EU"
]
] | It is known that General Relativity ({\bf GR}) uses a Lorentzian Manifold $(M_4;g)$ as a geometrical model of the physical spacetime. The metric $g$ is required to satisfy Einstein's equations. Since the 1960s many authors have tried to generalize this model by introducing torsion. In this paper we discuss the present ... |
1109.3533 | Gary Gibbons | G. Domokos, G. W. Gibbons | Spacetime interpretation of Torsion in Prismatic Bodies | 7 pages, one figure. Substantially revised: version accepted for
Journal of Elasticity | null | null | DAMTP-2011-71 | gr-qc cond-mat.mtrl-sci math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A non-linear theory for the plastic deformation of prismatic bodies is
constructed which interpolates between Prandtl's linear soap-film approximation
and N\'adai's sand-pile model . Geometrically Prandtl's soap film and N\'adai's
wavefront are unified into a single smooth surface of constant mean curvature
in three-... | [
{
"created": "Fri, 16 Sep 2011 06:46:43 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Mar 2012 11:48:20 GMT",
"version": "v2"
}
] | 2012-03-20 | [
[
"Domokos",
"G.",
""
],
[
"Gibbons",
"G. W.",
""
]
] | A non-linear theory for the plastic deformation of prismatic bodies is constructed which interpolates between Prandtl's linear soap-film approximation and N\'adai's sand-pile model . Geometrically Prandtl's soap film and N\'adai's wavefront are unified into a single smooth surface of constant mean curvature in three-di... |
1012.5386 | Misao Sasaki | Nathalie Deruelle and Misao Sasaki | Conformal transformations and Nordstr\"om's scalar theory of gravity | 9 pages, no figure, prepared for the Proceedings of YKIS2010, to be
published in Progress of Theoretical Physics Supplement | null | 10.1143/PTPS.190.143 | YITP-10-106 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | As we shall briefly recall, Nordstr\"om's theory of gravity is
observationally ruled out. It is however an interesting example of non-minimal
coupling of matter to gravity and of the role of conformal transformations. We
show in particular that they could be useful to extend manifolds through
curvature singularities.... | [
{
"created": "Fri, 24 Dec 2010 11:16:19 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Deruelle",
"Nathalie",
""
],
[
"Sasaki",
"Misao",
""
]
] | As we shall briefly recall, Nordstr\"om's theory of gravity is observationally ruled out. It is however an interesting example of non-minimal coupling of matter to gravity and of the role of conformal transformations. We show in particular that they could be useful to extend manifolds through curvature singularities. |
2101.05802 | Maciej Ossowski | Jerzy Lewandowski and Maciej Ossowski | Non-singular extension of the Kerr-NUT-(anti) de Sitter spacetimes | 29 pages, 2 figures. CLarifications and figures were added | Phys. Rev. D 104, 024022 (2021) | 10.1103/PhysRevD.104.024022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In 1963 Ezra Ted Newman and his two students Louis A. Tamburino, and Theodore
W. J. Unti, proposed a deformation of the Shwarzschild spacetime that made it
twisting. In the cosmological context, an equivalent solution had been found
earlier, in 1951, by Abraham Haskel Taub. The problem that these solutions have
is a ... | [
{
"created": "Thu, 14 Jan 2021 18:59:50 GMT",
"version": "v1"
},
{
"created": "Mon, 24 May 2021 11:01:34 GMT",
"version": "v2"
}
] | 2021-07-14 | [
[
"Lewandowski",
"Jerzy",
""
],
[
"Ossowski",
"Maciej",
""
]
] | In 1963 Ezra Ted Newman and his two students Louis A. Tamburino, and Theodore W. J. Unti, proposed a deformation of the Shwarzschild spacetime that made it twisting. In the cosmological context, an equivalent solution had been found earlier, in 1951, by Abraham Haskel Taub. The problem that these solutions have is a co... |
2211.01810 | Angelo Ricarte | Angelo Ricarte, Daniel C. M. Palumbo, Ramesh Narayan, Freek Roelofs,
Razieh Emami | Observational Signatures of Frame Dragging in Strong Gravity | Submitted to ApJL. 15 pages, 8 figures | null | 10.3847/2041-8213/aca087 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Objects orbiting in the presence of a rotating massive body experience a
gravitomagnetic frame-dragging effect, known as the Lense-Thirring effect, that
has been experimentally confirmed in the weak-field limit. In the strong-field
limit, near the horizon of a rotating black hole, frame dragging becomes so
extreme th... | [
{
"created": "Wed, 2 Nov 2022 14:24:07 GMT",
"version": "v1"
}
] | 2022-12-14 | [
[
"Ricarte",
"Angelo",
""
],
[
"Palumbo",
"Daniel C. M.",
""
],
[
"Narayan",
"Ramesh",
""
],
[
"Roelofs",
"Freek",
""
],
[
"Emami",
"Razieh",
""
]
] | Objects orbiting in the presence of a rotating massive body experience a gravitomagnetic frame-dragging effect, known as the Lense-Thirring effect, that has been experimentally confirmed in the weak-field limit. In the strong-field limit, near the horizon of a rotating black hole, frame dragging becomes so extreme that... |
gr-qc/0306020 | Wolfgang Tichy | Wolfgang Tichy, Bernd Bruegmann, Pablo Laguna | Gauge conditions for binary black hole puncture data based on an
approximate helical Killing vector | 11 pages, 6 figures, 2 tables | Phys.Rev.D68:064008,2003 | 10.1103/PhysRevD.68.064008 | null | gr-qc | null | We show that puncture data for quasicircular binary black hole orbits allow a
special gauge choice that realizes some of the necessary conditions for the
existence of an approximate helical Killing vector field. Introducing free
parameters for the lapse at the punctures we can satisfy the condition that the
Komar and... | [
{
"created": "Wed, 4 Jun 2003 16:25:56 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Tichy",
"Wolfgang",
""
],
[
"Bruegmann",
"Bernd",
""
],
[
"Laguna",
"Pablo",
""
]
] | We show that puncture data for quasicircular binary black hole orbits allow a special gauge choice that realizes some of the necessary conditions for the existence of an approximate helical Killing vector field. Introducing free parameters for the lapse at the punctures we can satisfy the condition that the Komar and A... |
1104.0060 | Wei-Tou Ni | Claus Braxmaier, Hansj\"org Dittus, Bernard Foulon, Ertan G\"okl\"u,
Catia Grimani, Jian Guo, Sven Herrmann, Claus L\"ammerzahl, Wei-Tou Ni, Achim
Peters, Benny Rievers, \'Etienne Samain, Hanns Selig, Diana Shaul, Drazen
Svehla, Pierre Touboul, Gang Wang, An-Ming Wu, Alexander F. Zakharov | Astrodynamical Space Test of Relativity using Optical Devices I (ASTROD
I) - A class-M fundamental physics mission proposal for Cosmic Vision
2015-2025: 2010 Update | 15 pages, 11 figures, 1 table, based on our 2010 proposal submitted
for the ESA call for class-M mission proposals, a sequel and an update to
previous paper [Experimental Astronomy 23 (2009) 491-527] which was based on
our last proposal submitted for the 2007 ESA call, submitted to Experimental
Astronomy | Experimental Astronomy (2012) 34,181-201 | 10.1007/s10686-011-9281-y | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper on ASTROD I is based on our 2010 proposal submitted for the ESA
call for class-M mission proposals, and is a sequel and an update to our
previous paper [Experimental Astronomy 23 (2009) 491-527; designated as Paper
I] which was based on our last proposal submitted for the 2007 ESA call. In
this paper, we p... | [
{
"created": "Fri, 1 Apr 2011 01:34:35 GMT",
"version": "v1"
}
] | 2012-10-25 | [
[
"Braxmaier",
"Claus",
""
],
[
"Dittus",
"Hansjörg",
""
],
[
"Foulon",
"Bernard",
""
],
[
"Göklü",
"Ertan",
""
],
[
"Grimani",
"Catia",
""
],
[
"Guo",
"Jian",
""
],
[
"Herrmann",
"Sven",
""
],
[
"Läm... | This paper on ASTROD I is based on our 2010 proposal submitted for the ESA call for class-M mission proposals, and is a sequel and an update to our previous paper [Experimental Astronomy 23 (2009) 491-527; designated as Paper I] which was based on our last proposal submitted for the 2007 ESA call. In this paper, we pre... |
2307.05428 | Giacomo Rosati | Giovanni Amelino-Camelia, Domenico Frattulillo, Giulia Gubitosi,
Giacomo Rosati and Suzana Bedi\'c | Phenomenology of DSR-relativistic in-vacuo dispersion in FLRW spacetime | In this updated version we extended the part devoted to the
quantitative analysis of our results, and added an appendix with an
explanatory application of the slicing procedure | null | null | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Studies of in-vacuo dispersion are the most active area of quantum-gravity
phenomenology. The way in which in-vacuo dispersion produces redshift-dependent
corrections to the time of flight of astrophysics particles depends on the
model-dependent interplay between Planck-scale effects and spacetime
curvature/expansion... | [
{
"created": "Tue, 11 Jul 2023 16:50:12 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Dec 2023 14:40:10 GMT",
"version": "v2"
}
] | 2023-12-15 | [
[
"Amelino-Camelia",
"Giovanni",
""
],
[
"Frattulillo",
"Domenico",
""
],
[
"Gubitosi",
"Giulia",
""
],
[
"Rosati",
"Giacomo",
""
],
[
"Bedić",
"Suzana",
""
]
] | Studies of in-vacuo dispersion are the most active area of quantum-gravity phenomenology. The way in which in-vacuo dispersion produces redshift-dependent corrections to the time of flight of astrophysics particles depends on the model-dependent interplay between Planck-scale effects and spacetime curvature/expansion, ... |
1911.11164 | Arun Ravishankar | Samuel E. Gralla, Arun Ravishankar and Peter Zimmerman | Horizon Instability of the Extremal BTZ Black Hole | 23 pages, 6 figures | J. High Energ. Phys. 2020, 94 (2020) | 10.1007/JHEP05(2020)094 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study real-time propagation of a massive scalar field on the extremal BTZ
black hole spacetime, focusing on the Aretakis instability of the event
horizon. We obtain a simple time-domain expression for the $\textrm{AdS}_3$
retarded Green function with Dirichlet boundary conditions and construct the
corresponding ti... | [
{
"created": "Mon, 25 Nov 2019 19:02:43 GMT",
"version": "v1"
},
{
"created": "Wed, 3 Jun 2020 01:08:13 GMT",
"version": "v2"
}
] | 2020-06-04 | [
[
"Gralla",
"Samuel E.",
""
],
[
"Ravishankar",
"Arun",
""
],
[
"Zimmerman",
"Peter",
""
]
] | We study real-time propagation of a massive scalar field on the extremal BTZ black hole spacetime, focusing on the Aretakis instability of the event horizon. We obtain a simple time-domain expression for the $\textrm{AdS}_3$ retarded Green function with Dirichlet boundary conditions and construct the corresponding time... |
gr-qc/0005101 | Nelson Pinto Neto | N. Pinto-Neto (Centro Brasileiro de Pesquisas F\'isicas), R. Rodrigues
da Silva (Centro Brasileiro de Pesquisas F\'isicas) | Generalized Field Theoretical Approach to General Relativity and
Conserved Quantities in Anti-de Sitter Spacetimes | LateX, 10 pages, Physical Review D 104002 (2000) | Phys.Rev. D61 (2000) 104002 | 10.1103/PhysRevD.61.104002 | null | gr-qc hep-th | null | A new prescription to calculate the total energies and angular momenta of
asymptotically $(d+1)$-dimensional anti-de Sitter spacetimes is proposed. The
method is based on an extension of the field theoretical approach to General
Relativity to the case where there is an effective cosmological constant. A
$(d-1)$-form ... | [
{
"created": "Tue, 23 May 2000 17:13:07 GMT",
"version": "v1"
}
] | 2016-08-15 | [
[
"Pinto-Neto",
"N.",
"",
"Centro Brasileiro de Pesquisas Físicas"
],
[
"da Silva",
"R. Rodrigues",
"",
"Centro Brasileiro de Pesquisas Físicas"
]
] | A new prescription to calculate the total energies and angular momenta of asymptotically $(d+1)$-dimensional anti-de Sitter spacetimes is proposed. The method is based on an extension of the field theoretical approach to General Relativity to the case where there is an effective cosmological constant. A $(d-1)$-form $\... |
1811.09419 | Nils Andersson | N. Andersson, B. Haskell, G.L. Comer and L. Samuelsson | The dynamics of neutron star crusts: Lagrangian perturbation theory for
a relativistic superfluid-elastic system | 31 pages, double spacing, minor typos fixed | null | 10.1088/1361-6382/ab12a1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inner crust of a mature neutron star is composed of an elastic lattice of
neutron-rich nuclei penetrated by free neutrons. These neutrons can flow
relative to the crust once the star cools below the superfluid transition
temperature. In order to model the dynamics of this system, which is relevant
for a range of ... | [
{
"created": "Fri, 23 Nov 2018 10:31:17 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Nov 2018 10:22:32 GMT",
"version": "v2"
}
] | 2019-05-22 | [
[
"Andersson",
"N.",
""
],
[
"Haskell",
"B.",
""
],
[
"Comer",
"G. L.",
""
],
[
"Samuelsson",
"L.",
""
]
] | The inner crust of a mature neutron star is composed of an elastic lattice of neutron-rich nuclei penetrated by free neutrons. These neutrons can flow relative to the crust once the star cools below the superfluid transition temperature. In order to model the dynamics of this system, which is relevant for a range of pr... |
gr-qc/9912022 | Amir H. Abbassi | Amir H. Abbassi | An Extension of Schwarzschild Space to r=0 | 16 pages, no figure, some errors are corrected, two sections on tidal
forces and Riemann scalar invariant are added. To appear in Physica Scripta | Phys.Scripta 64 (2001) 417-422 | 10.1238/Physica.Regular.064a00417 | null | gr-qc | null | A more rigorous treatment of the Schwarzschild metric by making use of the
energy-momentum tensor of a single point particle as source term shows that
$g_{00}=-\{1-\frac{2GM}{c^2r}-\frac{8G^2 M^2}{c^4 r^2}(\theta (r)-1)\}\exp
[2(\theta (r)-1)]$
$g_{rr}=\{1-\frac{2GM}{c^2r}-\frac{8G^2 M^2}{c^4 r^2}(\theta (r)-1)\}... | [
{
"created": "Tue, 7 Dec 1999 18:59:35 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Jul 2001 12:09:06 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Abbassi",
"Amir H.",
""
]
] | A more rigorous treatment of the Schwarzschild metric by making use of the energy-momentum tensor of a single point particle as source term shows that $g_{00}=-\{1-\frac{2GM}{c^2r}-\frac{8G^2 M^2}{c^4 r^2}(\theta (r)-1)\}\exp [2(\theta (r)-1)]$ $g_{rr}=\{1-\frac{2GM}{c^2r}-\frac{8G^2 M^2}{c^4 r^2}(\theta (r)-1)\}^{-1}$... |
0909.2956 | Luciano Vanzo | S. A. Hayward, R. Di Criscienzo, M. Nadalini, L. Vanzo, S. Zerbini | Reply to Comments on "Invariance of the tunneling method for dynamical
black holes" arXiv:0907.2020 | New section is added with further comments, in reply to second
comment on our first reply, one more references | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We point out basic misunderstandings about quantum field theory, general
relativity and partial derivatives in the above Comments. In reply to a second
comment on our first reply by the same author, we also identify precisely where
the author's original calculation goes wrong and correct it, yielding the same
local H... | [
{
"created": "Wed, 16 Sep 2009 08:46:27 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Sep 2009 13:39:53 GMT",
"version": "v2"
}
] | 2009-09-26 | [
[
"Hayward",
"S. A.",
""
],
[
"Di Criscienzo",
"R.",
""
],
[
"Nadalini",
"M.",
""
],
[
"Vanzo",
"L.",
""
],
[
"Zerbini",
"S.",
""
]
] | We point out basic misunderstandings about quantum field theory, general relativity and partial derivatives in the above Comments. In reply to a second comment on our first reply by the same author, we also identify precisely where the author's original calculation goes wrong and correct it, yielding the same local Haw... |
1903.03796 | Massimo Giovannini | Massimo Giovannini | Stimulated emission of relic gravitons and their super-Poissonian
statistics | 11 pages | Mod. Phys. Lett. A 34, 1950185 (2019) | 10.1142/S0217732319501852 | CERN-TH-2019-094 | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The degree of second-order coherence of the relic gravitons produced from the
vacuum is super-Poissonian and larger than in the case of a chaotic source
characterized by a Bose-Einstein distribution. If the initial state does not
minimize the tensor Hamiltonian and has a dispersion smaller than its averaged
multiplic... | [
{
"created": "Sat, 9 Mar 2019 13:00:29 GMT",
"version": "v1"
}
] | 2019-07-08 | [
[
"Giovannini",
"Massimo",
""
]
] | The degree of second-order coherence of the relic gravitons produced from the vacuum is super-Poissonian and larger than in the case of a chaotic source characterized by a Bose-Einstein distribution. If the initial state does not minimize the tensor Hamiltonian and has a dispersion smaller than its averaged multiplicit... |
2212.12173 | Crucean Cosmin | Cosmin Crucean and Amalia Dariana Fodor | Production of massive $W^{\pm}$ bosons and fermion-antifermion pairs
from vacuum in the de Sitter Universe | 55 pages, 24 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper we study the charged electro-weak interactions in the de Sitter
geometry. We develop the reduction formalism for the Proca field with the help
of the solutions for the interacting fields. Perturbation theory is used for
obtaining the definition of the transition amplitudes in the first order. We
apply o... | [
{
"created": "Fri, 23 Dec 2022 07:05:19 GMT",
"version": "v1"
}
] | 2022-12-26 | [
[
"Crucean",
"Cosmin",
""
],
[
"Fodor",
"Amalia Dariana",
""
]
] | In this paper we study the charged electro-weak interactions in the de Sitter geometry. We develop the reduction formalism for the Proca field with the help of the solutions for the interacting fields. Perturbation theory is used for obtaining the definition of the transition amplitudes in the first order. We apply our... |
1912.01740 | Felipe Asenjo | Felipe A. Asenjo and Sergio A. Hojman | Casimir force induced by electromagnetic wave polarization in Kerr,
G\"odel and Bianchi--I spacetimes | null | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Electromagnetic waves propagation on either rotating or anisotropic spacetime
backgrounds (such as Kerr and G\"odel metrics, or Bianchi-I metric) produce a
reduction of the magnitude of Casimir forces between plates. These curved
spacetimes behave as chiral or birefringent materials producing dispersion of
electromag... | [
{
"created": "Tue, 3 Dec 2019 23:42:21 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Apr 2020 14:56:47 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Feb 2021 14:41:32 GMT",
"version": "v3"
}
] | 2021-02-04 | [
[
"Asenjo",
"Felipe A.",
""
],
[
"Hojman",
"Sergio A.",
""
]
] | Electromagnetic waves propagation on either rotating or anisotropic spacetime backgrounds (such as Kerr and G\"odel metrics, or Bianchi-I metric) produce a reduction of the magnitude of Casimir forces between plates. These curved spacetimes behave as chiral or birefringent materials producing dispersion of electromagne... |
1306.6013 | Sandipan Sengupta | Sandipan Sengupta | Quantum geometry with a nondegenerate vacuum: a toy model | Title changed; Published version | Phys. Rev. D 88, 064016 (2013) | 10.1103/PhysRevD.88.064016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by a recent proposal (by Koslowski-Sahlmann) of a kinematical
representation in Loop Quantum Gravity (LQG) with a nondegenerate vacuum
metric, we construct a polymer quantization of the parametrised massless scalar
field theory on a Minkowskian cylinder. The dif- feomorphism covariant
kinematics is based on... | [
{
"created": "Tue, 25 Jun 2013 16:00:45 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Sep 2013 15:19:54 GMT",
"version": "v2"
}
] | 2013-09-12 | [
[
"Sengupta",
"Sandipan",
""
]
] | Motivated by a recent proposal (by Koslowski-Sahlmann) of a kinematical representation in Loop Quantum Gravity (LQG) with a nondegenerate vacuum metric, we construct a polymer quantization of the parametrised massless scalar field theory on a Minkowskian cylinder. The dif- feomorphism covariant kinematics is based on s... |
2203.13297 | Aurelien Barrau | Aur\'elien Barrau, Killian Martineau, Cyril Renevey | Catastrophic fate of Schwarzschild black holes in a thermal bath | null | null | 10.1103/PhysRevD.106.023509 | null | gr-qc astro-ph.CO astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the Schwarzschild metric as a rudimentary toy model, we pedagogically
revisit the curious prediction that the mass of a classical black hole in a
constant temperature thermal bath diverges in a finite amount of time. We study
in detail how this instability behaves if the temperature of the bath is
allowed to va... | [
{
"created": "Thu, 24 Mar 2022 18:50:36 GMT",
"version": "v1"
},
{
"created": "Sun, 10 Jul 2022 12:12:28 GMT",
"version": "v2"
}
] | 2022-07-27 | [
[
"Barrau",
"Aurélien",
""
],
[
"Martineau",
"Killian",
""
],
[
"Renevey",
"Cyril",
""
]
] | Using the Schwarzschild metric as a rudimentary toy model, we pedagogically revisit the curious prediction that the mass of a classical black hole in a constant temperature thermal bath diverges in a finite amount of time. We study in detail how this instability behaves if the temperature of the bath is allowed to vary... |
gr-qc/0109078 | Yuk Tung Liu | Yuk Tung Liu | Dynamical instability of new-born neutron stars as sources of
gravitational radiation | Major changes in Section III and some minor changes in the other
sections; add an appendix; 17 pages, 12 figures, accepted for publication by
Phys. Rev. D | Phys.Rev.D65:124003,2002 | 10.1103/PhysRevD.65.124003 | null | gr-qc astro-ph | null | The dynamical instability of new-born neutron stars is studied by evolving
the linearized hydrodynamical equations. The neutron stars considered in this
paper are those produced by the accretion induced collapse of rigidly rotating
white dwarfs. A dynamical bar-mode (m=2) instability is observed when the ratio
of rot... | [
{
"created": "Fri, 21 Sep 2001 23:41:30 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Mar 2002 03:45:42 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Liu",
"Yuk Tung",
""
]
] | The dynamical instability of new-born neutron stars is studied by evolving the linearized hydrodynamical equations. The neutron stars considered in this paper are those produced by the accretion induced collapse of rigidly rotating white dwarfs. A dynamical bar-mode (m=2) instability is observed when the ratio of rotat... |
2007.06035 | Daniela Pugliese Dr | D. Pugliese | Graph model overview, events scales structure and chains of events | 25 pages, 3 figure multipanels | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a graph model for a background independent, relational approach to
spacetime emergence. The general idea and the graph main features, detailed in
[1], are discussed. This is a combinatorial (dynamical) metric graph, colored
on vertexes, endowed with a classical distribution of colors probability on the
gra... | [
{
"created": "Sun, 12 Jul 2020 16:42:09 GMT",
"version": "v1"
}
] | 2020-07-14 | [
[
"Pugliese",
"D.",
""
]
] | We present a graph model for a background independent, relational approach to spacetime emergence. The general idea and the graph main features, detailed in [1], are discussed. This is a combinatorial (dynamical) metric graph, colored on vertexes, endowed with a classical distribution of colors probability on the graph... |
1507.03768 | Benrong Mu | Benrong Mu, Peng Wang, Haitang Yang | Thermodynamics and Luminosities of Rainbow Black Holes | 32 pages, 12 figures | null | 10.1088/1475-7516/2015/11/045 | CTP-SCU/2015010 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Doubly special relativity (DSR) is an effective model for encoding quantum
gravity in flat spacetime. As a result of the nonlinearity of the Lorentz
transformation, the energy-momentum dispersion relation is modified. One simple
way to import DSR to curved spacetime is \textquotedblleft Gravity's rainbow",
where the ... | [
{
"created": "Tue, 14 Jul 2015 08:46:38 GMT",
"version": "v1"
}
] | 2015-12-02 | [
[
"Mu",
"Benrong",
""
],
[
"Wang",
"Peng",
""
],
[
"Yang",
"Haitang",
""
]
] | Doubly special relativity (DSR) is an effective model for encoding quantum gravity in flat spacetime. As a result of the nonlinearity of the Lorentz transformation, the energy-momentum dispersion relation is modified. One simple way to import DSR to curved spacetime is \textquotedblleft Gravity's rainbow", where the sp... |
gr-qc/0005080 | Roy Maartens | Pankaj Joshi (Tata IFR), Naresh Dadhich (IUCAA), Roy Maartens
(Portsmouth) | Gamma-ray bursts as the birth-cries of black holes | 4 pages Revtex, 1 figure. This essay received an honorable mention in
the Gravity Research Foundation essay competition | Mod.Phys.Lett. A15 (2000) 991 | 10.1142/S0217732300000992 | null | gr-qc astro-ph | null | The origin of cosmic gamma-ray bursts remains one of the most intriguing
puzzles in astronomy. We suggest that purely general relativistic effects in
the collapse of massive stars could account for these bursts. The late
formation of closed trapped surfaces can occur naturally, allowing the escape
of huge energy from... | [
{
"created": "Thu, 18 May 2000 07:02:48 GMT",
"version": "v1"
}
] | 2016-12-21 | [
[
"Joshi",
"Pankaj",
"",
"Tata IFR"
],
[
"Dadhich",
"Naresh",
"",
"IUCAA"
],
[
"Maartens",
"Roy",
"",
"Portsmouth"
]
] | The origin of cosmic gamma-ray bursts remains one of the most intriguing puzzles in astronomy. We suggest that purely general relativistic effects in the collapse of massive stars could account for these bursts. The late formation of closed trapped surfaces can occur naturally, allowing the escape of huge energy from c... |
1505.06662 | Michael Reiterer | Michael Reiterer, Eugene Trubowitz | Filtered expansions in general relativity and one BKL-bounce | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When the vacuum Einstein equations are formulated in terms of a frame, rather
than a metric, can one perturb solutions with a degenerate frame into ones with
a nondegenerate frame? In examples we point out that one can encounter issues
already at the level of formal perturbative expansions; namely the
cohomological, ... | [
{
"created": "Mon, 25 May 2015 15:31:30 GMT",
"version": "v1"
}
] | 2015-05-26 | [
[
"Reiterer",
"Michael",
""
],
[
"Trubowitz",
"Eugene",
""
]
] | When the vacuum Einstein equations are formulated in terms of a frame, rather than a metric, can one perturb solutions with a degenerate frame into ones with a nondegenerate frame? In examples we point out that one can encounter issues already at the level of formal perturbative expansions; namely the cohomological, so... |
1611.01122 | Salvatore Vitale | Salvatore Vitale, Ryan Lynch, Vivien Raymond, Riccardo Sturani, John
Veitch, Philp Graff | Parameter estimation for heavy binary-black holes with networks of
second-generation gravitational-wave detectors | 18 pages, 28 figures. The abstract is cut in the Arxiv metadata.
Refer to PDF. Version accepted by PRD | Phys. Rev. D 95, 064053 (2017) | 10.1103/PhysRevD.95.064053 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The era of gravitational-wave astronomy has started with the discovery of the
binary black hole coalescences (BBH) GW150914 and GW151226 by the LIGO
instruments. These systems allowed for the first direct measurement of masses
and spins of black holes. The component masses in each of the systems have been
estimated w... | [
{
"created": "Thu, 3 Nov 2016 18:29:01 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Nov 2016 07:19:58 GMT",
"version": "v2"
},
{
"created": "Wed, 16 Nov 2016 01:17:54 GMT",
"version": "v3"
},
{
"created": "Wed, 1 Mar 2017 16:17:00 GMT",
"version": "v4"
}
] | 2017-04-05 | [
[
"Vitale",
"Salvatore",
""
],
[
"Lynch",
"Ryan",
""
],
[
"Raymond",
"Vivien",
""
],
[
"Sturani",
"Riccardo",
""
],
[
"Veitch",
"John",
""
],
[
"Graff",
"Philp",
""
]
] | The era of gravitational-wave astronomy has started with the discovery of the binary black hole coalescences (BBH) GW150914 and GW151226 by the LIGO instruments. These systems allowed for the first direct measurement of masses and spins of black holes. The component masses in each of the systems have been estimated wit... |
1305.0163 | Youngsub Yoon | Youngsub Yoon | Problems with Mannheim's conformal gravity program | 5 pages, no figures. Published version | Phys. Rev. D 88, 027504 (2013) | 10.1103/PhysRevD.88.027504 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that Mannheim's conformal gravity program, whose potential has a term
proportional to $1/r$ and another term proportional to $r$, does not reduce to
Newtonian gravity at short distances, unless one assumes undesirable
singularities of the mass density of the proton. Therefore, despite the claim
that it succes... | [
{
"created": "Wed, 1 May 2013 13:12:38 GMT",
"version": "v1"
},
{
"created": "Tue, 14 May 2013 14:01:01 GMT",
"version": "v2"
},
{
"created": "Fri, 14 Jun 2013 10:26:51 GMT",
"version": "v3"
},
{
"created": "Thu, 20 Jun 2013 18:01:01 GMT",
"version": "v4"
},
{
"cr... | 2013-12-16 | [
[
"Yoon",
"Youngsub",
""
]
] | We show that Mannheim's conformal gravity program, whose potential has a term proportional to $1/r$ and another term proportional to $r$, does not reduce to Newtonian gravity at short distances, unless one assumes undesirable singularities of the mass density of the proton. Therefore, despite the claim that it successf... |
gr-qc/0201027 | Christian Armendariz-Picon | C. Armendariz-Picon | On a class of stable, traversable Lorentzian wormholes in classical
general relativity | 23 pages, 4 figures, uses RevTeX4. v2: Changes to accommodate added
references. Statement about masses of the wormhole corrected | Phys.Rev.D65:104010,2002 | 10.1103/PhysRevD.65.104010 | null | gr-qc | null | It is known that Lorentzian wormholes must be threaded by matter that
violates the null energy condition. We phenomenologically characterize such
exotic matter by a general class of microscopic scalar field Lagrangians and
formulate the necessary conditions that the existence of Lorentzian wormholes
imposes on them. ... | [
{
"created": "Tue, 8 Jan 2002 17:10:40 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Jan 2002 17:31:58 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Armendariz-Picon",
"C.",
""
]
] | It is known that Lorentzian wormholes must be threaded by matter that violates the null energy condition. We phenomenologically characterize such exotic matter by a general class of microscopic scalar field Lagrangians and formulate the necessary conditions that the existence of Lorentzian wormholes imposes on them. Un... |
2308.07478 | Gil de Oliveira-Neto | G. Oliveira-Neto, A. Oliveira Castro Junior and G. A. Monerat | Tunneling probability for the birth of an universe with radiation in
Horava-Lifshitz theory | The paper has 20 pages and 9 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present work, we study the birth of a homogeneous and isotropic
Friedmann Lemaitre Robertson Walker (FLRW) cosmological model, considering
Horava Lifshitz (HL) as the gravitational theory. The matter content of the
model is a radiation perfect fluid. In order to study the birth of the universe
in the present m... | [
{
"created": "Mon, 14 Aug 2023 22:10:44 GMT",
"version": "v1"
}
] | 2023-08-16 | [
[
"Oliveira-Neto",
"G.",
""
],
[
"Junior",
"A. Oliveira Castro",
""
],
[
"Monerat",
"G. A.",
""
]
] | In the present work, we study the birth of a homogeneous and isotropic Friedmann Lemaitre Robertson Walker (FLRW) cosmological model, considering Horava Lifshitz (HL) as the gravitational theory. The matter content of the model is a radiation perfect fluid. In order to study the birth of the universe in the present mod... |
0710.0239 | Morteza Mohseni | Morteza Mohseni | Lagrangian description of world-line deviations | to appear in IJTP | Int.J.Theor.Phys.47:1079-1082,2008 | 10.1007/s10773-007-9535-7 | null | gr-qc | null | We introduce a Lagrangian which can be varied to give both the equation of
motion and world-line deviations of spinning particles simultaneously.
| [
{
"created": "Mon, 1 Oct 2007 09:26:28 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Mohseni",
"Morteza",
""
]
] | We introduce a Lagrangian which can be varied to give both the equation of motion and world-line deviations of spinning particles simultaneously. |
gr-qc/0104096 | Tolga Birkandan | Tolga Birkandan, M. Hortacsu | Three Dimensional Gravity in the Presence of Scalar Fields | 10 pages, 5 figures. Replaced by a revised version | Gen.Rel.Grav. 35 (2003) 457-466 | 10.1023/A:1022378101870 | null | gr-qc | null | We study a scalar field in curved space in three dimensions. We obtain a
static perturbative solution and show that this solution satisfies the exact
equations in the asymptotic region at infinity. The new solution gives rise to
a singularity in the curvature scalar at the origin. Our solution, however,
necessitates ... | [
{
"created": "Sat, 28 Apr 2001 17:25:36 GMT",
"version": "v1"
},
{
"created": "Thu, 3 May 2001 11:57:53 GMT",
"version": "v2"
},
{
"created": "Fri, 25 Jan 2002 13:37:51 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Birkandan",
"Tolga",
""
],
[
"Hortacsu",
"M.",
""
]
] | We study a scalar field in curved space in three dimensions. We obtain a static perturbative solution and show that this solution satisfies the exact equations in the asymptotic region at infinity. The new solution gives rise to a singularity in the curvature scalar at the origin. Our solution, however, necessitates th... |
0904.4038 | Kameshwar C. Wali | Karthik H. Shankar, Kameshwar C. Wali | Kaluza-Klein Theory with Torsion confined to the Extra-dimension | 5 pages, 1 figure | Mod.Phys.Lett.A25:2121-2130,2010 | 10.1142/S0217732310033566 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here we consider a variant of the 5 dimensional Kaluza-Klein theory within
the framework of Einstein-Cartan formalism that includes torsion. By imposing a
set of constraints on torsion and Ricci rotation coefficients, we show that the
torsion components are completely expressed in terms of the metric. Moreover,
the R... | [
{
"created": "Sun, 26 Apr 2009 16:37:53 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Apr 2010 13:47:09 GMT",
"version": "v2"
}
] | 2015-03-13 | [
[
"Shankar",
"Karthik H.",
""
],
[
"Wali",
"Kameshwar C.",
""
]
] | Here we consider a variant of the 5 dimensional Kaluza-Klein theory within the framework of Einstein-Cartan formalism that includes torsion. By imposing a set of constraints on torsion and Ricci rotation coefficients, we show that the torsion components are completely expressed in terms of the metric. Moreover, the Ric... |
1902.02265 | Patric H\"olscher | Patric H\"olscher and Dominik J. Schwarz | Gravitational waves from inspiralling compact binaries in conformal
gravity | 10 pages, 3 figures; Uses REVTeX 4.1; modified naming for the
different conformal gravity models; added a paragraph in the conclusions;
updated references | Phys. Rev. D 99, 084005 (2019) | 10.1103/PhysRevD.99.084005 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the production of gravitational waves during the inspiral of
compact binaries close to their merger in the context of a conformal gravity
model. The model incorporates five massive polarization degrees of freedom,
besides the two massless gravitational wave polarizations of general
relativity. For smal... | [
{
"created": "Wed, 6 Feb 2019 16:44:44 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Apr 2019 13:06:32 GMT",
"version": "v2"
}
] | 2019-04-17 | [
[
"Hölscher",
"Patric",
""
],
[
"Schwarz",
"Dominik J.",
""
]
] | We investigate the production of gravitational waves during the inspiral of compact binaries close to their merger in the context of a conformal gravity model. The model incorporates five massive polarization degrees of freedom, besides the two massless gravitational wave polarizations of general relativity. For small ... |
1909.08873 | Dipanjan Dey | Ashok B. Joshi, Parth Bambhaniya, Dipanjan Dey, Pankaj S. Joshi | Timelike Geodesics in Naked Singularity and Black Hole Spacetimes II | 13 pages, 24 figures | null | null | null | gr-qc astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | We derive here the orbit equations of particles in naked singularity
spacetimes, namely the Bertrand (BST) and Janis-Newman-Winicour (JNW)
geometries, and for the Schwarzschild black hole. We plot the orbit equations
and find the Perihelion precession of the orbits of particles in the BST and
JNW spacetimes and compa... | [
{
"created": "Thu, 19 Sep 2019 09:08:25 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Sep 2019 11:32:15 GMT",
"version": "v2"
}
] | 2019-09-23 | [
[
"Joshi",
"Ashok B.",
""
],
[
"Bambhaniya",
"Parth",
""
],
[
"Dey",
"Dipanjan",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | We derive here the orbit equations of particles in naked singularity spacetimes, namely the Bertrand (BST) and Janis-Newman-Winicour (JNW) geometries, and for the Schwarzschild black hole. We plot the orbit equations and find the Perihelion precession of the orbits of particles in the BST and JNW spacetimes and compare... |
1003.3107 | Alessandro D.A.M. Spallicci di Filottrano | Sofiane Aoudia, Alessandro D.A.M. Spallicci | Self-force and radial fall: new integration method for the Zerilli wave
equation | To appear in the XII Marcel Grossmann Meeting Proceedings, 12-18 July
2009 Paris, World Scientific. For v2, there is an added reference. For v3, we
have fixed some editorial errors in the time and second derivatives of the
wavefunction. | null | null | null | gr-qc astro-ph.CO math-ph math.MP physics.gen-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish the jump conditions for the wavefunction and its derivatives
through the formal solutions of the wave equation. These conditions respond to
the requirement of continuity of the perturbations at the position of the
particle and they are given for any mode at first order. Using these jump
conditions, we th... | [
{
"created": "Tue, 16 Mar 2010 09:25:35 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Apr 2010 09:01:02 GMT",
"version": "v2"
},
{
"created": "Mon, 10 May 2010 12:19:56 GMT",
"version": "v3"
}
] | 2010-05-11 | [
[
"Aoudia",
"Sofiane",
""
],
[
"Spallicci",
"Alessandro D. A. M.",
""
]
] | We establish the jump conditions for the wavefunction and its derivatives through the formal solutions of the wave equation. These conditions respond to the requirement of continuity of the perturbations at the position of the particle and they are given for any mode at first order. Using these jump conditions, we then... |
2403.05118 | Xiaoming Bi | Xiaoming Bi, Jan Harms | The response of the Moon to gravitational waves | 10 pages, 8 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The response of the Moon to gravitational waves (GWs) is used by some of the
proposed lunar GW detectors like the Lunar Gravitational-wave Antenna (LGWA) to
turn the Moon into an antenna for GWs. The deep connection between the lunar
internal structure, its geophysical environment and the study of the Universe
is int... | [
{
"created": "Fri, 8 Mar 2024 07:32:16 GMT",
"version": "v1"
}
] | 2024-03-11 | [
[
"Bi",
"Xiaoming",
""
],
[
"Harms",
"Jan",
""
]
] | The response of the Moon to gravitational waves (GWs) is used by some of the proposed lunar GW detectors like the Lunar Gravitational-wave Antenna (LGWA) to turn the Moon into an antenna for GWs. The deep connection between the lunar internal structure, its geophysical environment and the study of the Universe is intri... |
gr-qc/9705016 | Sharmanthie Fernando | Sharmanthie Fernando, Freydoon Mansouri | Rotating Charged Solutions to Einstein-Maxwell-ChernSimons Theory in 2+1
Dimensions | 15 pages, LaTeX, Improvements on presentation. All the results remain
unchanged | Comm. Math. Theor. Phys. , 1 (1998) 14 | null | UCTP 102.97 | gr-qc | null | We obtain a class of rotating charged stationary circularly symmetric
solutions of Einstein-Maxwell theory coupled to a topological mass term for the
Maxwell field. These solutions are regular, have finite mass and angular
momentum, and are asymptotic to the uncharged extreme BTZ black hole.
| [
{
"created": "Fri, 9 May 1997 16:04:15 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Sep 1999 22:21:00 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Fernando",
"Sharmanthie",
""
],
[
"Mansouri",
"Freydoon",
""
]
] | We obtain a class of rotating charged stationary circularly symmetric solutions of Einstein-Maxwell theory coupled to a topological mass term for the Maxwell field. These solutions are regular, have finite mass and angular momentum, and are asymptotic to the uncharged extreme BTZ black hole. |
1211.5024 | Xiangdong Zhang | Xiangdong Zhang and Yongge Ma | Loop quantum modified gravity and its cosmological application | 18pages. arXiv admin note: substantial text overlap with
arXiv:1107.5157 | Front. Phys., 8, 80 (2013) | 10.1007/s11467-013-0277-0 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general nonperturvative loop quantization procedure for metric modified
gravity is reviewed. As an example, this procedure is applied to scalar-tensor
theories of gravity. The quantum kinematical framework of these theories is
rigorously constructed. Both the Hamiltonian and master constraint operators
are well def... | [
{
"created": "Wed, 21 Nov 2012 13:26:36 GMT",
"version": "v1"
}
] | 2013-04-09 | [
[
"Zhang",
"Xiangdong",
""
],
[
"Ma",
"Yongge",
""
]
] | A general nonperturvative loop quantization procedure for metric modified gravity is reviewed. As an example, this procedure is applied to scalar-tensor theories of gravity. The quantum kinematical framework of these theories is rigorously constructed. Both the Hamiltonian and master constraint operators are well defin... |
1909.04691 | Jake Shipley | Jake O. Shipley | Strong-field gravitational lensing by black holes | PhD thesis. 258 pages, 45 figures | null | null | null | gr-qc nlin.CD | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this thesis we study aspects of strong-field gravitational lensing by
black holes in general relativity, with a particular focus on the role of
integrability and chaos in geodesic motion. We first investigate binary black
hole shadows using the Majumdar-Papapetrou static binary black hole (or
di-hole) solution. It... | [
{
"created": "Tue, 10 Sep 2019 18:10:09 GMT",
"version": "v1"
}
] | 2019-09-12 | [
[
"Shipley",
"Jake O.",
""
]
] | In this thesis we study aspects of strong-field gravitational lensing by black holes in general relativity, with a particular focus on the role of integrability and chaos in geodesic motion. We first investigate binary black hole shadows using the Majumdar-Papapetrou static binary black hole (or di-hole) solution. It i... |
0801.3411 | Serge Reynaud | Serge Reynaud, Brahim Lamine and Marc-Thierry Jaekel | Gravitational waves, diffusion and decoherence | Notes for two lectures given at the International School of Physics
Enrico Fermi on Atom Optics and Space Physics (Varenna, July 2007) | Proceedings of the International School of Physics "Enrico Fermi"
(2009) Volume 168 Atom Optics and Space Physics pp 219--239 | 10.3254/978-1-58603-990-5-219 | null | gr-qc astro-ph quant-ph | null | The quite different behaviors exhibited by microscopic and macroscopic
systems with respect to quantum interferences suggest that there may exist a
naturally frontier between quantum and classical worlds. The value of the
Planck mass (22$\mu$g) may lead to the idea of a connection between this
borderline and intrinsi... | [
{
"created": "Tue, 22 Jan 2008 16:38:47 GMT",
"version": "v1"
}
] | 2023-04-14 | [
[
"Reynaud",
"Serge",
""
],
[
"Lamine",
"Brahim",
""
],
[
"Jaekel",
"Marc-Thierry",
""
]
] | The quite different behaviors exhibited by microscopic and macroscopic systems with respect to quantum interferences suggest that there may exist a naturally frontier between quantum and classical worlds. The value of the Planck mass (22$\mu$g) may lead to the idea of a connection between this borderline and intrinsic ... |
0804.4888 | Yuri Shtanov | Yuri Shtanov, Alexander Viznyuk, Luis Norberto Granda | Asymmetric embedding in brane cosmology | 10 pages | Mod.Phys.Lett.A23:869-878,2008 | 10.1142/S0217732308026856 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a system of cosmological equations for a braneworld with induced
curvature which is a junction between several bulk spaces. The permutation
symmetry of the bulk spaces is not imposed, and the values of the fundamental
constants, and even the signatures of the extra dimension, may be different on
different s... | [
{
"created": "Wed, 30 Apr 2008 19:33:31 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Shtanov",
"Yuri",
""
],
[
"Viznyuk",
"Alexander",
""
],
[
"Granda",
"Luis Norberto",
""
]
] | We derive a system of cosmological equations for a braneworld with induced curvature which is a junction between several bulk spaces. The permutation symmetry of the bulk spaces is not imposed, and the values of the fundamental constants, and even the signatures of the extra dimension, may be different on different sid... |
1801.10085 | Diego S\'aez-Chill\'on G\'omez | Alvaro de la Cruz-Dombriz, Gabriel Farrugia, Jackson Levi Said and
Diego Saez-Chillon Gomez | Cosmological bouncing solutions in extended teleparallel gravity
theories | 30 pages, 1 figure | Phys. Rev. D 97, 104040 (2018) | 10.1103/PhysRevD.97.104040 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the context of extended Teleparallel gravity theories with a 3+1
dimensions Gauss-Bonnet analog term, we address the possibility of these
theories reproducing several well-known cosmological bouncing scenarios in a
four-dimensional Friedmann-Lema\^itre-Robertson-Walker geometry. We shall study
which types of gravi... | [
{
"created": "Tue, 30 Jan 2018 16:20:48 GMT",
"version": "v1"
},
{
"created": "Sat, 26 May 2018 12:04:20 GMT",
"version": "v2"
}
] | 2018-05-30 | [
[
"de la Cruz-Dombriz",
"Alvaro",
""
],
[
"Farrugia",
"Gabriel",
""
],
[
"Said",
"Jackson Levi",
""
],
[
"Gomez",
"Diego Saez-Chillon",
""
]
] | In the context of extended Teleparallel gravity theories with a 3+1 dimensions Gauss-Bonnet analog term, we address the possibility of these theories reproducing several well-known cosmological bouncing scenarios in a four-dimensional Friedmann-Lema\^itre-Robertson-Walker geometry. We shall study which types of gravita... |
2306.08357 | Alessio Belfiglio | Alessio Belfiglio, Orlando Luongo, Stefano Mancini | Entanglement area law violation from field-curvature coupling | 8 pages, 3 figures | Phys. Lett. B 848 (2024) 138398 | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the entanglement entropy of a massive scalar field
nonminimally coupled to spacetime curvature, assuming a static, spherically
symmetric background. We discretize the field Hamiltonian by introducing a
lattice of spherical shells and imposing a cutoff in the radial direction. We
then study the ground s... | [
{
"created": "Wed, 14 Jun 2023 08:48:51 GMT",
"version": "v1"
}
] | 2024-02-16 | [
[
"Belfiglio",
"Alessio",
""
],
[
"Luongo",
"Orlando",
""
],
[
"Mancini",
"Stefano",
""
]
] | We investigate the entanglement entropy of a massive scalar field nonminimally coupled to spacetime curvature, assuming a static, spherically symmetric background. We discretize the field Hamiltonian by introducing a lattice of spherical shells and imposing a cutoff in the radial direction. We then study the ground sta... |
gr-qc/0309108 | Eduard Alexis Larranaga Rubio | Alexis Larranaga | Time Delay in Gravitational Lensing by a Charged Black Hole of String
Theory | 9 pages | null | null | null | gr-qc | null | We calculate the time delay between different relativistic images formed by
the gravitational lensing produced by the
Gibbons-Maeda-Garfinkle-Horowitz-Stromiger (GMGHS) charged black hole of
heterotic string theory. Modeling the supermassive central objects of some
galaxies as GMGHS black holes, numerical values of t... | [
{
"created": "Tue, 23 Sep 2003 01:19:55 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Sep 2003 14:59:23 GMT",
"version": "v2"
},
{
"created": "Mon, 16 Jul 2007 13:35:34 GMT",
"version": "v3"
}
] | 2007-07-16 | [
[
"Larranaga",
"Alexis",
""
]
] | We calculate the time delay between different relativistic images formed by the gravitational lensing produced by the Gibbons-Maeda-Garfinkle-Horowitz-Stromiger (GMGHS) charged black hole of heterotic string theory. Modeling the supermassive central objects of some galaxies as GMGHS black holes, numerical values of the... |
gr-qc/0302020 | Fred Cooperstock I. | F. I. Cooperstock and S. Tieu | The Energy of a Dynamical Wave-Emitting System in General Relativity | 36 pages, 2 figures, to appear in Foundations of Physics | Found.Phys. 33 (2003) 1033-1059 | 10.1023/A:1025633817361 | null | gr-qc astro-ph | null | The problem of energy and its localization in general relativity is
critically re-examined. The Tolman energy integral for the Eddington spinning
rod is analyzed in detail and evaluated apart from a single term. It is shown
that a higher order iteration is required to find its value. Details of
techniques to solve ma... | [
{
"created": "Thu, 6 Feb 2003 23:05:26 GMT",
"version": "v1"
}
] | 2022-10-12 | [
[
"Cooperstock",
"F. I.",
""
],
[
"Tieu",
"S.",
""
]
] | The problem of energy and its localization in general relativity is critically re-examined. The Tolman energy integral for the Eddington spinning rod is analyzed in detail and evaluated apart from a single term. It is shown that a higher order iteration is required to find its value. Details of techniques to solve math... |
1804.10951 | Kun Meng | Kun Meng | Hairy black holes of Lovelock-Born-Infeld-Scalar gravity | 12 pages, 3 figures; v3: final version to appear in PLB | Phys.Lett.B, 784 (2018) 56-61 | 10.1016/j.physletb.2018.07.029 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we construct new hairy black holes of
Lovelock-Born-Infeld-Scalar gravity in diverse dimensions. We study horizon
structures of the black holes and find the black holes may possess three
horizons, two horizons or one horizon. We give the thermodynamic quantities and
check the first laws. We study the th... | [
{
"created": "Sun, 29 Apr 2018 15:07:07 GMT",
"version": "v1"
},
{
"created": "Tue, 1 May 2018 05:14:16 GMT",
"version": "v2"
},
{
"created": "Fri, 27 Jul 2018 06:19:05 GMT",
"version": "v3"
}
] | 2018-08-02 | [
[
"Meng",
"Kun",
""
]
] | In this paper we construct new hairy black holes of Lovelock-Born-Infeld-Scalar gravity in diverse dimensions. We study horizon structures of the black holes and find the black holes may possess three horizons, two horizons or one horizon. We give the thermodynamic quantities and check the first laws. We study the ther... |
gr-qc/0208003 | Ozgur Delice | Metin Arik, Ozgur Delice | Trapping photons by a line singularity | 15 pages, 9 figures, replaced with revised version | Int.J.Mod.Phys. D12 (2003) 1095-1112 | 10.1142/S0218271803003475 | null | gr-qc | null | We present cylindrically symmetric, static solutions of the Einstein field
equations around a line singularity such that the energy momentum tensor
corresponds to infinitely thin photonic shells. Positivity of the energy
density of the thin shell and the line singularity is discussed. It is also
shown that thick shel... | [
{
"created": "Thu, 1 Aug 2002 12:16:25 GMT",
"version": "v1"
},
{
"created": "Thu, 10 Oct 2002 10:35:38 GMT",
"version": "v2"
},
{
"created": "Tue, 17 Dec 2002 19:41:04 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Arik",
"Metin",
""
],
[
"Delice",
"Ozgur",
""
]
] | We present cylindrically symmetric, static solutions of the Einstein field equations around a line singularity such that the energy momentum tensor corresponds to infinitely thin photonic shells. Positivity of the energy density of the thin shell and the line singularity is discussed. It is also shown that thick shells... |
2211.10820 | Daniil Krichevskiy | Svetlana Andrusenko, Daniil Krichevskiy, Valentin Rudenko | Black holes and the nature of the event horizon | This is lecture notes for summer school III Summer International
Youth School "Gravity, Cosmology and Astrophysics" at Bauman Moscow State
Technical University (2022) | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The problem of the event horizon in relativistic gravity is discussed.
Singular solutions in general relativity are well known. The Schwarschild
metric of a spherical mass is singular at zero ($r = 0$) and at the event
horizon ($r = r_g$). Both features reflect the existence of the phenomenon of
collapse in general r... | [
{
"created": "Sat, 19 Nov 2022 23:09:26 GMT",
"version": "v1"
}
] | 2022-11-22 | [
[
"Andrusenko",
"Svetlana",
""
],
[
"Krichevskiy",
"Daniil",
""
],
[
"Rudenko",
"Valentin",
""
]
] | The problem of the event horizon in relativistic gravity is discussed. Singular solutions in general relativity are well known. The Schwarschild metric of a spherical mass is singular at zero ($r = 0$) and at the event horizon ($r = r_g$). Both features reflect the existence of the phenomenon of collapse in general rel... |
1904.00123 | Benjamin C. Harms | Benjamin Harms | Rotating AdS Einstein universes from constrained metrics | 11 pages, 1 figure | Phys. Rev. D 99, 124021 (2019) | 10.1103/PhysRevD.99.124021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The imposition of a constraint between the metric tensor elements in both
three- and four-dimensional, rotating AdS space-times is shown to reduce the
number of independent equations of motion and to result in new families of
solutions to the equations of motion. For the geometries investigated analytic
solutions or ... | [
{
"created": "Sat, 30 Mar 2019 00:13:12 GMT",
"version": "v1"
}
] | 2019-06-19 | [
[
"Harms",
"Benjamin",
""
]
] | The imposition of a constraint between the metric tensor elements in both three- and four-dimensional, rotating AdS space-times is shown to reduce the number of independent equations of motion and to result in new families of solutions to the equations of motion. For the geometries investigated analytic solutions or pa... |
gr-qc/9310002 | null | G.W. Gibbons, C.G. Wells | Anti-Gravity Bounds and the Ricci Tensor | 15, DAMTP R-93-25 | null | null | null | gr-qc | null | Recently Penrose, Sorkin and Woolgar have developed a new technique for
proving the positive mass theorem in general relativity. We extend their result
to produce a new inequality relating the mass, electric and scalar charges in
theories coupling to a dilaton in the usual way. Using a five dimensional
formalism, our... | [
{
"created": "Fri, 1 Oct 1993 16:12:44 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gibbons",
"G. W.",
""
],
[
"Wells",
"C. G.",
""
]
] | Recently Penrose, Sorkin and Woolgar have developed a new technique for proving the positive mass theorem in general relativity. We extend their result to produce a new inequality relating the mass, electric and scalar charges in theories coupling to a dilaton in the usual way. Using a five dimensional formalism, our r... |
gr-qc/0309103 | Eran Rosenthal | Eran Rosenthal | Massive-Field Approach to the Scalar Self Force in Curved Spacetime | 23 pages, few modifications | Phys.Rev. D69 (2004) 064035 | 10.1103/PhysRevD.69.064035 | null | gr-qc | null | We derive a new regularization method for the calculation of the (massless)
scalar self force in curved spacetime. In this method, the scalar self force is
expressed in terms of the difference between two retarded scalar fields: the
massless scalar field, and an auxiliary massive scalar field. This field
difference c... | [
{
"created": "Sun, 21 Sep 2003 14:52:41 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Oct 2004 19:33:38 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Rosenthal",
"Eran",
""
]
] | We derive a new regularization method for the calculation of the (massless) scalar self force in curved spacetime. In this method, the scalar self force is expressed in terms of the difference between two retarded scalar fields: the massless scalar field, and an auxiliary massive scalar field. This field difference com... |
0903.0227 | Yi Wang | Miao Li, Yi Pang, Yi Wang | K-essence Explains a Lorentz Violation Experiment | 8 pages, the final version, discussion and references added | Phys.Rev.D79:125016,2009 | 10.1103/PhysRevD.79.125016 | CAS-KITPC/ITP-087 | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, a state of the art experiment shows evidence for Lorentz violation
in the gravitational sector. To explain this experiment, we investigate a
spontaneous Lorentz violation scenario with a generalized scalar field. We find
that when the scalar field is nonminimally coupled to gravity, the Lorentz
violation in... | [
{
"created": "Mon, 2 Mar 2009 08:10:47 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Mar 2009 02:00:54 GMT",
"version": "v2"
},
{
"created": "Thu, 18 Jun 2009 05:22:36 GMT",
"version": "v3"
}
] | 2010-04-30 | [
[
"Li",
"Miao",
""
],
[
"Pang",
"Yi",
""
],
[
"Wang",
"Yi",
""
]
] | Recently, a state of the art experiment shows evidence for Lorentz violation in the gravitational sector. To explain this experiment, we investigate a spontaneous Lorentz violation scenario with a generalized scalar field. We find that when the scalar field is nonminimally coupled to gravity, the Lorentz violation indu... |
gr-qc/9806103 | J. Frauendiener | J\"org Frauendiener | Calculating initial data for the conformal Einstein equations by
pseudo-spectral methods | LaTeX2e, 18 pages, 7 figures | null | null | null | gr-qc | null | We present a numerical scheme for determining hyperboloidal initial data sets
for the conformal field equations by using pseudo-spectral methods. This
problem is split into two parts. The first step is the determination of a
suitable conformal factor which transforms from an initial data set in physical
space-time to... | [
{
"created": "Fri, 26 Jun 1998 09:20:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Frauendiener",
"Jörg",
""
]
] | We present a numerical scheme for determining hyperboloidal initial data sets for the conformal field equations by using pseudo-spectral methods. This problem is split into two parts. The first step is the determination of a suitable conformal factor which transforms from an initial data set in physical space-time to a... |
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