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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2101.11033 | Yoshinta Setyawati | Yoshinta Setyawati, Frank Ohme | Adding eccentricity to quasicircular binary-black-hole waveform models | 10 pages, 8 figures | Phys. Rev. D 103, 124011 (2021) | 10.1103/PhysRevD.103.124011 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The detection of gravitational-wave signals from coalescing eccentric binary
black holes would yield unprecedented information about the formation and
evolution of compact binaries in specific scenarios, such as dynamical
formation in dense stellar clusters and three-body interactions. The
gravitational-wave searches... | [
{
"created": "Tue, 26 Jan 2021 19:04:07 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Jun 2021 12:28:57 GMT",
"version": "v2"
}
] | 2021-06-09 | [
[
"Setyawati",
"Yoshinta",
""
],
[
"Ohme",
"Frank",
""
]
] | The detection of gravitational-wave signals from coalescing eccentric binary black holes would yield unprecedented information about the formation and evolution of compact binaries in specific scenarios, such as dynamical formation in dense stellar clusters and three-body interactions. The gravitational-wave searches b... |
2107.04868 | Christian Marinoni | R. Codur and C. Marinoni | Redshift drift in radially inhomogeneous Lema\^itre-Tolman-Bondi
spacetimes | 14 pages, 6 figures (Manuscript identical to the version accepted and
published by PRD) | Phys. Rev. D 104, 123531 (2021) | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We provide a formula for estimating the redshift and its secular change
(redshift drift) in Lema\^itre-Tolman-Bondi (LTB) spherically symmetric
universes. We compute the scaling of the redshift drift for LTB models that
predict Hubble diagrams indistinguishable from those of the standard
cosmological model, the flat ... | [
{
"created": "Sat, 10 Jul 2021 15:55:14 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Dec 2021 08:33:43 GMT",
"version": "v2"
}
] | 2021-12-17 | [
[
"Codur",
"R.",
""
],
[
"Marinoni",
"C.",
""
]
] | We provide a formula for estimating the redshift and its secular change (redshift drift) in Lema\^itre-Tolman-Bondi (LTB) spherically symmetric universes. We compute the scaling of the redshift drift for LTB models that predict Hubble diagrams indistinguishable from those of the standard cosmological model, the flat $\... |
2102.04603 | Wei Hong | Hanwen Feng, Yuchen Huang, Wei Hong and Jun Tao | Charged torus-like black holes as heat engines | 16 pages, 8 figures, accepted by Communications in Theoretical
Physics | null | 10.1088/1572-9494/abe3ef | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate the thermodynamical properties of charged torus-like black
holes and take it as the working substance to study the heat engines. In the
extended phase space, by interpreting the cosmological constant as the
thermodynamic pressure, we derive the thermodynamical quantities by the first
law of black hole ... | [
{
"created": "Tue, 9 Feb 2021 02:04:47 GMT",
"version": "v1"
}
] | 2021-02-10 | [
[
"Feng",
"Hanwen",
""
],
[
"Huang",
"Yuchen",
""
],
[
"Hong",
"Wei",
""
],
[
"Tao",
"Jun",
""
]
] | We investigate the thermodynamical properties of charged torus-like black holes and take it as the working substance to study the heat engines. In the extended phase space, by interpreting the cosmological constant as the thermodynamic pressure, we derive the thermodynamical quantities by the first law of black hole th... |
2306.15603 | Angela D. V. Di Virgilio Dr | Carlo Altucci, Francesco Bajardi, Andrea Basti, Nicol\`o Beverini,
Giorgio Carelli, Salvatore Capozziello, Simone Castellano, Donatella
Ciampini, Fabrizio Dav\`i, Francesco dell'Isola, Gaetano De Luca, Roberto
Devoti, Giuseppe Di Somma, Angela D.V. Di Virgilio, Francesco Fuso, Ivan
Giorgio, Aladino Govoni, Enri... | Status of the GINGER project | 7 pages, 1 figure | null | null | null | gr-qc astro-ph.IM physics.ins-det quant-ph | http://creativecommons.org/licenses/by/4.0/ | Large frame Ring laser gyroscopes, based on the Sagnac effect, are top
sensitivity instrumentation to measure angular velocity with respect to the
fixed stars. GINGER (Gyroscopes IN GEneral Relativity) project foresees the
construction of an array of three large dimension ring laser gyroscopes,
rigidly connected to t... | [
{
"created": "Tue, 27 Jun 2023 16:42:26 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jul 2023 06:14:13 GMT",
"version": "v2"
}
] | 2023-07-13 | [
[
"Altucci",
"Carlo",
""
],
[
"Bajardi",
"Francesco",
""
],
[
"Basti",
"Andrea",
""
],
[
"Beverini",
"Nicolò",
""
],
[
"Carelli",
"Giorgio",
""
],
[
"Capozziello",
"Salvatore",
""
],
[
"Castellano",
"Simone",
... | Large frame Ring laser gyroscopes, based on the Sagnac effect, are top sensitivity instrumentation to measure angular velocity with respect to the fixed stars. GINGER (Gyroscopes IN GEneral Relativity) project foresees the construction of an array of three large dimension ring laser gyroscopes, rigidly connected to the... |
gr-qc/0401028 | Peter Kuhfittig K. F. | Peter K. F. Kuhfittig | Axially symmetric rotating traversable wormholes | 17 pages, AMSTeX | Phys.Rev.D67:064015,2003 | 10.1103/PhysRevD.67.064015 | null | gr-qc | null | This paper generalizes the static and spherically symmetric traversable
wormhole geometry to a rotating axially symmetric one with a time-dependent
angular velocity by means of an exact solution. It was found that the violation
of the weak energy condition, although unavoidable, is considerably less severe
than in th... | [
{
"created": "Thu, 8 Jan 2004 16:31:25 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Kuhfittig",
"Peter K. F.",
""
]
] | This paper generalizes the static and spherically symmetric traversable wormhole geometry to a rotating axially symmetric one with a time-dependent angular velocity by means of an exact solution. It was found that the violation of the weak energy condition, although unavoidable, is considerably less severe than in the ... |
2402.09365 | R. E. Kastner | A. Schlatter, R. E. Kastner | A Note on the Origin of Inertia | arXiv admin note: text overlap with arXiv:2209.04025 | Foundations 2024, 4(2), 146-155 | 10.3390/foundations4020011 | null | gr-qc physics.hist-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The question of where the inertial properties of matter come from has been
open for a long time. Isaac Newton considered inertia an intrinsic property of
matter. Ernst Mach held a different view whereby the inertia of a body comes
from its interaction with the rest of the universe. This idea is known today as
Mach's ... | [
{
"created": "Wed, 14 Feb 2024 18:12:52 GMT",
"version": "v1"
}
] | 2024-04-25 | [
[
"Schlatter",
"A.",
""
],
[
"Kastner",
"R. E.",
""
]
] | The question of where the inertial properties of matter come from has been open for a long time. Isaac Newton considered inertia an intrinsic property of matter. Ernst Mach held a different view whereby the inertia of a body comes from its interaction with the rest of the universe. This idea is known today as Mach's pr... |
1510.03562 | Alena Pravdov\'a | Martin Kuchynka, Alena Pravdova | Spacetimes of Weyl and Ricci type N in higher dimensions | 16 pages, section 6 added, section 7 reduced, tables 1 and 3 added,
other minor changes | Class. Quantum Grav. 33, 115006 (2016) | 10.1088/0264-9381/33/11/115006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the geometrical properties of null congruences generated by an
aligned null direction of the Weyl tensor (WAND) in spacetimes of the Weyl and
Ricci type N (possibly with a non-vanishing cosmological constant) in an
arbitrary dimension. We prove that a type N Ricci tensor and a type III or N
Weyl tensor have ... | [
{
"created": "Tue, 13 Oct 2015 07:50:11 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Jan 2016 08:52:12 GMT",
"version": "v2"
},
{
"created": "Fri, 3 Jun 2016 09:03:14 GMT",
"version": "v3"
}
] | 2016-06-06 | [
[
"Kuchynka",
"Martin",
""
],
[
"Pravdova",
"Alena",
""
]
] | We study the geometrical properties of null congruences generated by an aligned null direction of the Weyl tensor (WAND) in spacetimes of the Weyl and Ricci type N (possibly with a non-vanishing cosmological constant) in an arbitrary dimension. We prove that a type N Ricci tensor and a type III or N Weyl tensor have to... |
1007.4525 | Davide Batic | C. Angulo Santacruz, D. Batic and M. Nowakowski | On the existence of certain axisymmetric interior metrics | 27 pages, accepted for publication in Journal of Mathematical Physics | J.Math.Phys.51:082504,2010 | 10.1063/1.3475798 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the effects of noncommutative coordinate operators is that the
delta-function connected to the quantum mechanical amplitude between states
sharp to the position operator gets smeared by a Gaussian distribution.
Although this is not the full account of effects of noncommutativity, this
effect is in particular i... | [
{
"created": "Mon, 26 Jul 2010 18:06:26 GMT",
"version": "v1"
}
] | 2015-05-19 | [
[
"Santacruz",
"C. Angulo",
""
],
[
"Batic",
"D.",
""
],
[
"Nowakowski",
"M.",
""
]
] | One of the effects of noncommutative coordinate operators is that the delta-function connected to the quantum mechanical amplitude between states sharp to the position operator gets smeared by a Gaussian distribution. Although this is not the full account of effects of noncommutativity, this effect is in particular imp... |
gr-qc/0207039 | Sergey M. Kozyrev | S.M.Kozyrev | Properties of the static, spherically symmetric solutions in the Jordan,
Brans-Dicke theory | 9 pages | null | null | null | gr-qc | null | We have studied the properties of the static, spherically symmetric solution
of Jordan, Brans-Dicke theory. An exact interior solution for standard
space-time line element in the Schwarzschild form is obtained.
| [
{
"created": "Tue, 9 Jul 2002 05:09:16 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kozyrev",
"S. M.",
""
]
] | We have studied the properties of the static, spherically symmetric solution of Jordan, Brans-Dicke theory. An exact interior solution for standard space-time line element in the Schwarzschild form is obtained. |
2111.00975 | Martina Muratore | Olaf Hartwig, Martina Muratore | Characterization of Time Delay Interferometry combinations for the LISA
instrument noise | null | null | 10.1103/PhysRevD.105.062006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Time delay interferometry (TDI) is a post-processing technique used in the
Laser Interferometer Space Antenna (LISA) to reduce laser frequency noise by
building an equal-arm interferometer via combining time-shifted raw phase
measurements. The set of so-called 2nd generation TDI variables which
sufficiently suppress ... | [
{
"created": "Mon, 1 Nov 2021 14:36:47 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Jan 2022 10:52:24 GMT",
"version": "v2"
}
] | 2022-04-06 | [
[
"Hartwig",
"Olaf",
""
],
[
"Muratore",
"Martina",
""
]
] | Time delay interferometry (TDI) is a post-processing technique used in the Laser Interferometer Space Antenna (LISA) to reduce laser frequency noise by building an equal-arm interferometer via combining time-shifted raw phase measurements. The set of so-called 2nd generation TDI variables which sufficiently suppress la... |
gr-qc/0207081 | M. B. Altaie | M.R. Setare and M.B. Altaie | Casimir energy for spherical shell in Schwarzchild black hole background | 10 pages, no figure,discussion added, references added, has been
accepted for the publication in GRG | Gen.Rel.Grav. 36 (2004) 331-341 | 10.1023/B:GERG.0000010479.98616.da | null | gr-qc | null | In this paper, we consider the Casimir energy of massless scalar field which
satisfy Dirichlet boundary condition on a spherical shell. Outside the shell,
the spacetime is assumed to be described by the Schwarzschild metric, while
inside the shell it is taken to be the flat Minkowski space. Using zeta
function regula... | [
{
"created": "Sun, 21 Jul 2002 19:06:15 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Aug 2003 06:27:52 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Setare",
"M. R.",
""
],
[
"Altaie",
"M. B.",
""
]
] | In this paper, we consider the Casimir energy of massless scalar field which satisfy Dirichlet boundary condition on a spherical shell. Outside the shell, the spacetime is assumed to be described by the Schwarzschild metric, while inside the shell it is taken to be the flat Minkowski space. Using zeta function regulari... |
2106.01137 | Genly Le\'on | Andronikos Paliathanasis (DUT, Durban and Chile Austral U., Valdivia),
Genly Leon (Catolica del Norte U.) | Cosmological evolution in $f(T,B)$ gravity | 18 pages, 6 compound figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For the fourth-order teleparallel $f\left(T,B\right) $ theory of gravity, we
investigate the cosmological evolution for the universe in the case of a
spatially flat Friedmann--Lema\^{\i}tre--Robertson--Walker background space. We
focus on the case for which $f\left(T,B\right) $ is separable, that is,
$f\left(T,B\righ... | [
{
"created": "Wed, 2 Jun 2021 13:08:50 GMT",
"version": "v1"
}
] | 2021-06-03 | [
[
"Paliathanasis",
"Andronikos",
"",
"DUT, Durban and Chile Austral U., Valdivia"
],
[
"Leon",
"Genly",
"",
"Catolica del Norte U."
]
] | For the fourth-order teleparallel $f\left(T,B\right) $ theory of gravity, we investigate the cosmological evolution for the universe in the case of a spatially flat Friedmann--Lema\^{\i}tre--Robertson--Walker background space. We focus on the case for which $f\left(T,B\right) $ is separable, that is, $f\left(T,B\right)... |
2112.09779 | Nelson Pantoja | Juan Calles and Nelson Pantoja | Conformal Isometries and Curvature Collineations of an Impulsive Plane
Wave: a distributional approach | null | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | By extending the notion of Lie derivative to distribution-valued tensor
fields of order $m$, Lie derivatives with respect to $C^k$ vector fields,
$k\geqslant m+1$, can be shown to be well defined. Geometric symmetries,
definable in terms of these Lie derivatives, can then be considered. In
particular, for spacetimes ... | [
{
"created": "Fri, 17 Dec 2021 21:50:12 GMT",
"version": "v1"
}
] | 2021-12-21 | [
[
"Calles",
"Juan",
""
],
[
"Pantoja",
"Nelson",
""
]
] | By extending the notion of Lie derivative to distribution-valued tensor fields of order $m$, Lie derivatives with respect to $C^k$ vector fields, $k\geqslant m+1$, can be shown to be well defined. Geometric symmetries, definable in terms of these Lie derivatives, can then be considered. In particular, for spacetimes of... |
1906.08657 | Quentin G. Bailey | Quentin G. Bailey | Recent Developments in Spacetime-Symmetry tests in Gravity | 4 pages, Presented at the Eighth Meeting on CPT and Lorentz Symmetry,
Bloomington, Indiana, May 12-16, 2019, updated version with typos fixed | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We summarize theoretical and experimental work on tests of CPT and local
Lorentz symmetry in gravity. Recent developments include extending the
effective field theory framework into the nonlinear regime of gravity.
| [
{
"created": "Thu, 20 Jun 2019 14:19:44 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jun 2019 10:46:36 GMT",
"version": "v2"
}
] | 2019-06-26 | [
[
"Bailey",
"Quentin G.",
""
]
] | We summarize theoretical and experimental work on tests of CPT and local Lorentz symmetry in gravity. Recent developments include extending the effective field theory framework into the nonlinear regime of gravity. |
1406.7713 | Ra\'ul Carballo-Rubio | Carlos Barcel\'o, Ra\'ul Carballo-Rubio, and Luis J. Garay | Absence of cosmological constant problem in special relativistic field
theory of gravity | v1: 10 pages; v2: 10 pages, small changes, references added; v3: 22
pages including more detailed discussions, version as accepted for
publication | Annals of Physics 398 (2018) 9-23 | 10.1016/j.aop.2018.08.016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The principles of quantum field theory in flat spacetime suggest that gravity
is mediated by a massless particle with helicity $\pm2$, the so-called
graviton. It is regarded as textbook knowledge that, when the self-coupling of
a particle with these properties is considered, the long-wavelength structure
of such a no... | [
{
"created": "Mon, 30 Jun 2014 13:05:49 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Aug 2014 19:19:38 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Sep 2018 13:40:36 GMT",
"version": "v3"
}
] | 2018-09-25 | [
[
"Barceló",
"Carlos",
""
],
[
"Carballo-Rubio",
"Raúl",
""
],
[
"Garay",
"Luis J.",
""
]
] | The principles of quantum field theory in flat spacetime suggest that gravity is mediated by a massless particle with helicity $\pm2$, the so-called graviton. It is regarded as textbook knowledge that, when the self-coupling of a particle with these properties is considered, the long-wavelength structure of such a nonl... |
gr-qc/0405119 | Andrzej Okolow | Andrzej Okolow and Jerzy Lewandowski | Automorphism covariant representations of the holonomy-flux *-algebra | 34 pages, 1 figure, LaTeX2e, minor clarifying remarks | Class.Quant.Grav. 22 (2005) 657-680 | 10.1088/0264-9381/22/4/002 | null | gr-qc | null | We continue an analysis of representations of cylindrical functions and
fluxes which are commonly used as elementary variables of Loop Quantum Gravity.
We consider an arbitrary principal bundle of a compact connected structure
group and following Sahlmann's ideas define a holonomy-flux *-algebra whose
elements corres... | [
{
"created": "Sun, 23 May 2004 17:30:22 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Feb 2005 13:23:55 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Okolow",
"Andrzej",
""
],
[
"Lewandowski",
"Jerzy",
""
]
] | We continue an analysis of representations of cylindrical functions and fluxes which are commonly used as elementary variables of Loop Quantum Gravity. We consider an arbitrary principal bundle of a compact connected structure group and following Sahlmann's ideas define a holonomy-flux *-algebra whose elements correspo... |
gr-qc/9809085 | Roy Maartens | Carlos Sopuerta (Jena), Roy Maartens (Portsmouth), George Ellis (Cape
Town), William Lesame (Pretoria) | Nonperturbative gravito-magnetic fields | Minor changes to match published version; to appear in Phys. Rev. D | Phys.Rev. D60 (1999) 024006 | 10.1103/PhysRevD.60.024006 | mth.uct.ac.za-9809 | gr-qc astro-ph | null | In a cold matter universe, the linearized gravito-magnetic tensor field
satisfies a transverse condition (vanishing divergence) when it is purely
radiative. We show that in the nonlinear theory, it is no longer possible to
maintain the transverse condition, since it leads to a non-terminating chain of
integrability c... | [
{
"created": "Wed, 30 Sep 1998 12:04:40 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Apr 1999 15:49:27 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Sopuerta",
"Carlos",
"",
"Jena"
],
[
"Maartens",
"Roy",
"",
"Portsmouth"
],
[
"Ellis",
"George",
"",
"Cape\n Town"
],
[
"Lesame",
"William",
"",
"Pretoria"
]
] | In a cold matter universe, the linearized gravito-magnetic tensor field satisfies a transverse condition (vanishing divergence) when it is purely radiative. We show that in the nonlinear theory, it is no longer possible to maintain the transverse condition, since it leads to a non-terminating chain of integrability con... |
1306.1019 | Martin Reiris | Martin Reiris, Maria Eugenia Gabach Clement | On the shape of rotating black-holes | Changes made to match published version in Phy. Rev. D | null | 10.1103/PhysRevD.88.044031 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a thorough description of the shape of rotating axisymmetric stable
black-hole (apparent) horizons applicable in dynamical or stationary regimes.
It is found that rotation manifests in the widening of their central regions
(rotational thickening), limits their global shapes to the extent that stable
holes of ... | [
{
"created": "Wed, 5 Jun 2013 08:26:41 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Nov 2013 13:03:39 GMT",
"version": "v2"
}
] | 2013-11-21 | [
[
"Reiris",
"Martin",
""
],
[
"Clement",
"Maria Eugenia Gabach",
""
]
] | We give a thorough description of the shape of rotating axisymmetric stable black-hole (apparent) horizons applicable in dynamical or stationary regimes. It is found that rotation manifests in the widening of their central regions (rotational thickening), limits their global shapes to the extent that stable holes of a ... |
2304.06801 | Kristen Schumacher | Kristen Schumacher, Scott Ellis Perkins, Ashley Shaw, Kent Yagi,
Nicolas Yunes | Gravitational wave constraints on Einstein-\ae{}ther theory with
LIGO/Virgo data | 32 pages, 24 figures; replaced with accepted version | null | 10.1103/PhysRevD.108.104053 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Lorentz symmetry is a fundamental property of Einstein's theory of general
relativity that one may wish to test with gravitational wave observations.
Einstein-aether theory is a model that introduces Lorentz-symmetry breaking in
the gravitational sector through an aether vector field, while still leading to
second-or... | [
{
"created": "Thu, 13 Apr 2023 19:57:56 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Nov 2023 22:34:09 GMT",
"version": "v2"
}
] | 2023-12-01 | [
[
"Schumacher",
"Kristen",
""
],
[
"Perkins",
"Scott Ellis",
""
],
[
"Shaw",
"Ashley",
""
],
[
"Yagi",
"Kent",
""
],
[
"Yunes",
"Nicolas",
""
]
] | Lorentz symmetry is a fundamental property of Einstein's theory of general relativity that one may wish to test with gravitational wave observations. Einstein-aether theory is a model that introduces Lorentz-symmetry breaking in the gravitational sector through an aether vector field, while still leading to second-orde... |
gr-qc/0111047 | Maria da Conceicao Bento | M. C. Bento, O. Bertolami and N. C. Santos | Quintessence with Coupled Scalar Fields | Contribution to COSMO-01 Workshop, Rovaniemi, Finland, August 30 -
September 4, 2001; 10 pages, 4 eps figures, LaTeX | null | null | null | gr-qc | null | We discuss the dynamics of a quintessence model involving two coupled scalar
fields. The model presents two types of solutions, namely solutions that
correspond to eternal and transient acceleration of the universe. In both
cases, we obtain values for the cosmological parameters that satisfy current
observational bou... | [
{
"created": "Thu, 15 Nov 2001 16:02:04 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Nov 2001 15:22:09 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Bento",
"M. C.",
""
],
[
"Bertolami",
"O.",
""
],
[
"Santos",
"N. C.",
""
]
] | We discuss the dynamics of a quintessence model involving two coupled scalar fields. The model presents two types of solutions, namely solutions that correspond to eternal and transient acceleration of the universe. In both cases, we obtain values for the cosmological parameters that satisfy current observational bound... |
0808.1824 | Joseph Zuntz | J.A. Zuntz, P.G. Ferreira, T.G. Zlosnik | Constraining Lorentz violation with cosmology | 4 pages, 4 figures | Phys.Rev.Lett.101:261102,2008 | 10.1103/PhysRevLett.101.261102 | null | gr-qc astro-ph hep-th | http://creativecommons.org/licenses/by-nc-sa/3.0/ | The Einstein-Aether theory provides a simple, dynamical mechanism for
breaking Lorentz invariance. It does so within a generally covariant context
and may emerge from quantum effects in more fundamental theories. The theory
leads to a preferred frame and can have distinct experimental signatures. In
this letter, we p... | [
{
"created": "Wed, 13 Aug 2008 13:53:11 GMT",
"version": "v1"
}
] | 2009-01-22 | [
[
"Zuntz",
"J. A.",
""
],
[
"Ferreira",
"P. G.",
""
],
[
"Zlosnik",
"T. G.",
""
]
] | The Einstein-Aether theory provides a simple, dynamical mechanism for breaking Lorentz invariance. It does so within a generally covariant context and may emerge from quantum effects in more fundamental theories. The theory leads to a preferred frame and can have distinct experimental signatures. In this letter, we per... |
0712.2894 | Sergey Kozyrev | S.M.Kozyrev | A D-dimensional Heckmann-like solution of Jordan-Brans-Dicke theory | 5 pages | null | null | null | gr-qc | null | In this short letter we present a some rigorous vacuum solutions of the
D-dimensional Jordan-Brans-Dicke field equations. In contrast with the well
known Brans-Dicke solutions, to the search of static and spherically symmetric
space-time we choose the widespread Hilbert coordinates.
| [
{
"created": "Tue, 18 Dec 2007 08:02:04 GMT",
"version": "v1"
}
] | 2007-12-19 | [
[
"Kozyrev",
"S. M.",
""
]
] | In this short letter we present a some rigorous vacuum solutions of the D-dimensional Jordan-Brans-Dicke field equations. In contrast with the well known Brans-Dicke solutions, to the search of static and spherically symmetric space-time we choose the widespread Hilbert coordinates. |
gr-qc/0307059 | Carlos F. Sopuerta | Marco Bruni and Carlos F. Sopuerta | Covariant Fluid Dynamics: a Long Wave-Length Approximation | 18 pages. LaTeX2e. IOP Style | Class.Quant.Grav. 20 (2003) 5275-5290 | 10.1088/0264-9381/20/24/003 | null | gr-qc astro-ph | null | In this paper we consider the Long-Wavelength Approximation Scheme (LWAS) in
the framework of the covariant fluid approach to general relativistic dynamics,
specializing to the particular case of irrotational dust matter. We discuss the
dynamics of these models during the approach to any spacelike singularity where
a... | [
{
"created": "Fri, 11 Jul 2003 23:01:53 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Bruni",
"Marco",
""
],
[
"Sopuerta",
"Carlos F.",
""
]
] | In this paper we consider the Long-Wavelength Approximation Scheme (LWAS) in the framework of the covariant fluid approach to general relativistic dynamics, specializing to the particular case of irrotational dust matter. We discuss the dynamics of these models during the approach to any spacelike singularity where a B... |
1806.11472 | Mohammad Ali Gorji | Hassan Firouzjahi, Mohammad Ali Gorji, Seyed Ali Hosseini Mansoori,
Asieh Karami, Tahereh Rostami | Two-field disformal transformation and mimetic cosmology | 21 pages, accepted for publication in JCAP | null | 10.1088/1475-7516/2018/11/046 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend the disformal transformation to models with two scalar fields and
look at its singular limit. Solving the eigentensor equation for the Jacobian
of the transformation of the metrics we find the two-field extension of the
mimetic scenario in the singular conformal limit. At the background level the
setup mimi... | [
{
"created": "Wed, 27 Jun 2018 17:58:40 GMT",
"version": "v1"
},
{
"created": "Sat, 17 Nov 2018 19:44:50 GMT",
"version": "v2"
}
] | 2018-12-05 | [
[
"Firouzjahi",
"Hassan",
""
],
[
"Gorji",
"Mohammad Ali",
""
],
[
"Mansoori",
"Seyed Ali Hosseini",
""
],
[
"Karami",
"Asieh",
""
],
[
"Rostami",
"Tahereh",
""
]
] | We extend the disformal transformation to models with two scalar fields and look at its singular limit. Solving the eigentensor equation for the Jacobian of the transformation of the metrics we find the two-field extension of the mimetic scenario in the singular conformal limit. At the background level the setup mimics... |
2106.07595 | Asier Alonso-Bardaji | Asier Alonso-Bardaji and David Brizuela | Anomaly-free deformations of spherical general relativity coupled to
matter | Minor changes and typo corrections | Phys. Rev. D 104, 084064 (2021) | 10.1103/PhysRevD.104.084064 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A systematic approach is developed in order to obtain spherically symmetric
midisuperspace models that accept holonomy modifications in the presence of
matter fields with local degrees of freedom. In particular, starting from the
most general Hamiltonian quadratic in radial derivatives of the variables, we
obtain a f... | [
{
"created": "Mon, 14 Jun 2021 16:55:45 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Aug 2022 14:24:25 GMT",
"version": "v2"
}
] | 2022-08-12 | [
[
"Alonso-Bardaji",
"Asier",
""
],
[
"Brizuela",
"David",
""
]
] | A systematic approach is developed in order to obtain spherically symmetric midisuperspace models that accept holonomy modifications in the presence of matter fields with local degrees of freedom. In particular, starting from the most general Hamiltonian quadratic in radial derivatives of the variables, we obtain a fam... |
1703.03289 | Piyali Bhar | Piyali Bhar, Ksh. Newton Singh and Tuhina Manna | A new class of relativistic model of compact stars of embedding class I | 21 pages, 17 figures, 3 tables, Accepted for publication in
International Journal of Modern Physics D | null | 10.1142/S0218271817500900 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we have constructed a new relativistic anisotropic
compact star model having a spherically symmetric metric of embedding class
one. Here we have assumed an arbitrary form of metric function and solved the
Einstein relativistic field equations with the help of Karmarkar condition for
an anisotropi... | [
{
"created": "Mon, 6 Mar 2017 06:20:28 GMT",
"version": "v1"
}
] | 2017-07-26 | [
[
"Bhar",
"Piyali",
""
],
[
"Singh",
"Ksh. Newton",
""
],
[
"Manna",
"Tuhina",
""
]
] | In the present paper we have constructed a new relativistic anisotropic compact star model having a spherically symmetric metric of embedding class one. Here we have assumed an arbitrary form of metric function and solved the Einstein relativistic field equations with the help of Karmarkar condition for an anisotropic ... |
1709.06875 | Zeinab Dayyani | Z. Dayyani, A. Sheykhi, M. H. Dehghani and S. Hajkhalili | Critical behavior and phase transition of dilaton black holes with
nonlinear electrodynamics | null | Eur. Phys. J. C (2018) 78:152 | 10.1140/epjc/s10052-018-5623-5 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we take into account the dilaton black hole solutions of
Einstein gravity in the presence of logarithmic and exponential forms of
nonlinear electrodynamics. At first, we consider the cosmological constant and
nonlinear parameter as thermodynamic quantities which can vary. We obtain
thermodynamic quanti... | [
{
"created": "Sun, 17 Sep 2017 08:30:33 GMT",
"version": "v1"
},
{
"created": "Sun, 11 Mar 2018 10:57:21 GMT",
"version": "v2"
}
] | 2018-03-13 | [
[
"Dayyani",
"Z.",
""
],
[
"Sheykhi",
"A.",
""
],
[
"Dehghani",
"M. H.",
""
],
[
"Hajkhalili",
"S.",
""
]
] | In this paper, we take into account the dilaton black hole solutions of Einstein gravity in the presence of logarithmic and exponential forms of nonlinear electrodynamics. At first, we consider the cosmological constant and nonlinear parameter as thermodynamic quantities which can vary. We obtain thermodynamic quantiti... |
1410.0041 | Vassilis S. Geroyannis | Vassilis S. Geroyannis, Vasileios G. Karageorgopoulos | Critical rotation of general-relativistic polytropic models simulating
neutron stars: a post-Newtonian hybrid approximative scheme | 24 pages | null | 10.1016/j.newast.2015.03.002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a "hybrid approximative scheme" in the framework of the
post-Newtonian approximation for computing general-relativistic polytropic
models simulating neutron stars in critical rigid rotation. We treat the
differential equations governing such a model as a "complex initial value
problem", and we solve it by ... | [
{
"created": "Tue, 30 Sep 2014 20:26:14 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Geroyannis",
"Vassilis S.",
""
],
[
"Karageorgopoulos",
"Vasileios G.",
""
]
] | We develop a "hybrid approximative scheme" in the framework of the post-Newtonian approximation for computing general-relativistic polytropic models simulating neutron stars in critical rigid rotation. We treat the differential equations governing such a model as a "complex initial value problem", and we solve it by us... |
1502.01411 | Joan Sola | Harald Fritzsch and Joan Sola | Fundamental constants and cosmic vacuum: the micro and macro connection | Updated version to appear in Modern Physics Letters A (special issue
on "Fundamental Constants in Physics and Their Time Variation" ) | Mod. Phys. Lett. A, Vol. 30, No. 22 (2015) 1540034 | 10.1142/S0217732315400349 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The idea that the vacuum energy density $\rho_{\Lambda}$ could be time
dependent is a most reasonable one in the expanding Universe; in fact, much
more reasonable than just a rigid cosmological constant for the entire cosmic
history. Being $\rho_{\Lambda}=\rho_{\Lambda}(t)$ dynamical, it offers a
possibility to tackl... | [
{
"created": "Thu, 5 Feb 2015 02:26:19 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Mar 2015 10:54:16 GMT",
"version": "v2"
}
] | 2015-07-08 | [
[
"Fritzsch",
"Harald",
""
],
[
"Sola",
"Joan",
""
]
] | The idea that the vacuum energy density $\rho_{\Lambda}$ could be time dependent is a most reasonable one in the expanding Universe; in fact, much more reasonable than just a rigid cosmological constant for the entire cosmic history. Being $\rho_{\Lambda}=\rho_{\Lambda}(t)$ dynamical, it offers a possibility to tackle ... |
2011.01134 | Seema Satin | Seema Satin | Adiabatic index for relativistic stars as a coefficient of non-thermal
dissipation | null | null | null | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The adiabatic index of a relativistic star (modeled by a perfect fluid) is
shown to act as a dissipation constant due to considerations of mesoscopic
scale stochastic effects. This dissipative effect arises without taking heat
flux in the fluid model and is termed as adiabatic or non-thermal for the
system under cons... | [
{
"created": "Mon, 2 Nov 2020 17:14:21 GMT",
"version": "v1"
}
] | 2020-11-03 | [
[
"Satin",
"Seema",
""
]
] | The adiabatic index of a relativistic star (modeled by a perfect fluid) is shown to act as a dissipation constant due to considerations of mesoscopic scale stochastic effects. This dissipative effect arises without taking heat flux in the fluid model and is termed as adiabatic or non-thermal for the system under consid... |
1001.1337 | J. -F. Pascual-Sanchez | J.-F. Pascual-S\'anchez, A. San Miguel, F. Vicente | Relativistic versus Newtonian frames: emission coordinates | 6 pages, 3 figures, added references, minor changes, Talk presented
by one of us (JFPS) at the 2nd Colloquium "Scientific and Fundamental Aspects
of the Galileo Programme", Padua, Italy, 14-16 October 2009, submitted to the
Proceedings | null | null | null | gr-qc physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Only a causal class among the 199 Lorentzian ones, which do not exists in the
Newtonian spacetime, is privileged to construct a generic, gravity free and
immediate (non retarded) relativistic positioning system. This is the causal
class of the null emission coordinates. Emission coordinates are defined and
generated ... | [
{
"created": "Fri, 8 Jan 2010 18:58:10 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Feb 2010 13:09:31 GMT",
"version": "v2"
}
] | 2010-02-01 | [
[
"Pascual-Sánchez",
"J. -F.",
""
],
[
"Miguel",
"A. San",
""
],
[
"Vicente",
"F.",
""
]
] | Only a causal class among the 199 Lorentzian ones, which do not exists in the Newtonian spacetime, is privileged to construct a generic, gravity free and immediate (non retarded) relativistic positioning system. This is the causal class of the null emission coordinates. Emission coordinates are defined and generated by... |
2302.02784 | Minou Khoshrangbaf | Amin Rezaei Akbarieh, Minou Khoshragbaf and Mohammad Atazadeh | Accretion disk around regular black holes | 12 pages, 11 figures, 1 table | null | null | null | gr-qc astro-ph.GA | http://creativecommons.org/publicdomain/zero/1.0/ | Regular black holes are crucially important as approaches to solving the
singularity problem, and in this paper, the accretion disk of Bardeen and
Hayward models have been studied. For this purpose, we calculated the physical
properties of black holes, including radiant energy, luminosity derivative,
temperature, and... | [
{
"created": "Mon, 6 Feb 2023 13:56:54 GMT",
"version": "v1"
}
] | 2023-02-07 | [
[
"Akbarieh",
"Amin Rezaei",
""
],
[
"Khoshragbaf",
"Minou",
""
],
[
"Atazadeh",
"Mohammad",
""
]
] | Regular black holes are crucially important as approaches to solving the singularity problem, and in this paper, the accretion disk of Bardeen and Hayward models have been studied. For this purpose, we calculated the physical properties of black holes, including radiant energy, luminosity derivative, temperature, and c... |
2310.04568 | Masoud Ghezelbash | Michael Butler, Masoud Ghezelbash | NUT Solutions in Einstein-Maxwell-scalar-Gauss-Bonnet Gravity | 30 pages, 15 figures, references added | Phys. Rev. D 109, 044018 (2024) | 10.1103/PhysRevD.109.044018 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this article, we consider a class of four-dimensional Einstein-Maxwell
theory which is coupled non-minimally to a scalar field and the Gauss-Bonnet
invariant. We mainly use the numerical methods to find the solutions to the
theory, with the NUT twist. We find explicitly the numerical solutions to all
of the field ... | [
{
"created": "Fri, 6 Oct 2023 20:15:25 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Jan 2024 18:30:36 GMT",
"version": "v2"
},
{
"created": "Mon, 22 Jan 2024 15:43:07 GMT",
"version": "v3"
}
] | 2024-03-12 | [
[
"Butler",
"Michael",
""
],
[
"Ghezelbash",
"Masoud",
""
]
] | In this article, we consider a class of four-dimensional Einstein-Maxwell theory which is coupled non-minimally to a scalar field and the Gauss-Bonnet invariant. We mainly use the numerical methods to find the solutions to the theory, with the NUT twist. We find explicitly the numerical solutions to all of the field eq... |
1606.01044 | Rodrigo Turcati | Bethan Cropp, Stefano Liberati, Rodrigo Turcati | Analogue black holes in relativistic BECs: Mimicking Killing and
universal horizons | 24 pages, 2 figures. Final version matching the published one in PRD | Phys. Rev. D 94, 063003 (2016) | 10.1103/PhysRevD.94.063003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Relativistic Bose-Einstein condensates (rBECs) have recently become a
well-established system for analogue gravity. Indeed, while such relativistic
systems cannot be yet realized experimentally, they provide an interesting
framework for mimicking metrics for which no analogue is yet available, so
paving the way for f... | [
{
"created": "Fri, 3 Jun 2016 11:08:12 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Sep 2016 16:01:02 GMT",
"version": "v2"
}
] | 2016-09-19 | [
[
"Cropp",
"Bethan",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Turcati",
"Rodrigo",
""
]
] | Relativistic Bose-Einstein condensates (rBECs) have recently become a well-established system for analogue gravity. Indeed, while such relativistic systems cannot be yet realized experimentally, they provide an interesting framework for mimicking metrics for which no analogue is yet available, so paving the way for fur... |
2105.11770 | Qingyu Gan | Qingyu Gan, Peng Wang, Houwen Wu, Haitang Yang | Photon Ring and Observational Appearance of a Hairy Black Hole | v1:18pages, 8 figures; v2: 18pages, 8 figures, references added | Phys. Rev. D 104, 044049 (2021) | 10.1103/PhysRevD.104.044049 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, the image of a Schwarzschild black hole with an accretion disk has
been revisited, and it showed that the "photon ring", defined as highly bent
light rays that intersect the disk plane more than twice, is extremely narrow
and makes a negligible contribution to the total brightness. In this paper, we
investi... | [
{
"created": "Tue, 25 May 2021 09:11:34 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Jun 2021 14:11:29 GMT",
"version": "v2"
}
] | 2021-08-25 | [
[
"Gan",
"Qingyu",
""
],
[
"Wang",
"Peng",
""
],
[
"Wu",
"Houwen",
""
],
[
"Yang",
"Haitang",
""
]
] | Recently, the image of a Schwarzschild black hole with an accretion disk has been revisited, and it showed that the "photon ring", defined as highly bent light rays that intersect the disk plane more than twice, is extremely narrow and makes a negligible contribution to the total brightness. In this paper, we investiga... |
1705.00868 | Somenath Chakrabarty | Sanchita Das, Sutapa Ghosh and Somenath Chakrabarty | Thomas-Fermi Model in Rindler Space | 9 pages with one embedded .eps figure. Some version will appear in
Mod. Phys. Lett. A | Mod. Phys. Lett. Vol. 32, Page- 1750180, Year- 2017 | 10.1142/S0217732317501802 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article we have investigated the Thomas-Fermi model for the electron
gas in Rindler space. We have found that if the uniform acceleration is along
$+x$-direction, then there is $y-z$-symmetry in space. For the sake of
mathematical simplicity, we have assumed two dimensional spatial structure
($x-y$) in Rindle... | [
{
"created": "Tue, 2 May 2017 09:14:48 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Sep 2017 06:41:11 GMT",
"version": "v2"
}
] | 2017-11-22 | [
[
"Das",
"Sanchita",
""
],
[
"Ghosh",
"Sutapa",
""
],
[
"Chakrabarty",
"Somenath",
""
]
] | In this article we have investigated the Thomas-Fermi model for the electron gas in Rindler space. We have found that if the uniform acceleration is along $+x$-direction, then there is $y-z$-symmetry in space. For the sake of mathematical simplicity, we have assumed two dimensional spatial structure ($x-y$) in Rindler ... |
2309.03327 | Anzhong Wang | Rui Pan, John Joseph Marchetta, Jamal Saeed, Gerald Cleaver, Bao-Fei
Li, Anzhong Wang and Tao Zhu | Uniform Asymptotic Approximation Method with P\"oschl-Teller Potential | Universe 2023, 9 (11), 471. In Honor of Prof. Jorge Pullin on His
60th Anniversary | Universe 2023, 9 (11), 471 | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we study analytical approximate solutions of the second-order
homogeneous differential equations with the existence of only two turning
points (but without poles), by using the uniform asymptotic approximation (UAA)
method. To be more concrete, we consider the P\"oschl-Teller (PT) potential,
for which ... | [
{
"created": "Wed, 6 Sep 2023 19:18:04 GMT",
"version": "v1"
},
{
"created": "Sat, 28 Oct 2023 17:05:36 GMT",
"version": "v2"
},
{
"created": "Sat, 6 Jan 2024 04:43:02 GMT",
"version": "v3"
}
] | 2024-01-09 | [
[
"Pan",
"Rui",
""
],
[
"Marchetta",
"John Joseph",
""
],
[
"Saeed",
"Jamal",
""
],
[
"Cleaver",
"Gerald",
""
],
[
"Li",
"Bao-Fei",
""
],
[
"Wang",
"Anzhong",
""
],
[
"Zhu",
"Tao",
""
]
] | In this paper, we study analytical approximate solutions of the second-order homogeneous differential equations with the existence of only two turning points (but without poles), by using the uniform asymptotic approximation (UAA) method. To be more concrete, we consider the P\"oschl-Teller (PT) potential, for which an... |
1511.07129 | Stefan Stricker | Rudolf Baier and Stefan Stricker | Comment on Hawking radiation and trapping horizons | 13 pages, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider dynamical black hole formation from a collapsing fluid described
by a symmetric and flat FRW metric. Using the Hamilton-Jacobi method the local
Hawking temperature for the formed trapping/apparent horizon is calculated. The
local Hawking temperature depends on the tunneling path, which we take to be
along... | [
{
"created": "Mon, 23 Nov 2015 08:11:39 GMT",
"version": "v1"
}
] | 2016-01-04 | [
[
"Baier",
"Rudolf",
""
],
[
"Stricker",
"Stefan",
""
]
] | We consider dynamical black hole formation from a collapsing fluid described by a symmetric and flat FRW metric. Using the Hamilton-Jacobi method the local Hawking temperature for the formed trapping/apparent horizon is calculated. The local Hawking temperature depends on the tunneling path, which we take to be along a... |
1603.03373 | Ambrish Raghoonundun | Ambrish M. Raghoonundun and David W. Hobill | Self-gravitating charged fluid spheres with anisotropic pressures | Submitted to Journal of General Relativity and Gravitation | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The coupled system of the spherically symmetric Einstein--Maxwell
differential equations is solved under two different source conditions:
non-zero electric charge and pressure anisotropy. Expressions for the metric
functions, and pressures which extend the Tolman VII exact solution are deduced
from the new solutions.... | [
{
"created": "Thu, 10 Mar 2016 19:03:39 GMT",
"version": "v1"
}
] | 2016-03-11 | [
[
"Raghoonundun",
"Ambrish M.",
""
],
[
"Hobill",
"David W.",
""
]
] | The coupled system of the spherically symmetric Einstein--Maxwell differential equations is solved under two different source conditions: non-zero electric charge and pressure anisotropy. Expressions for the metric functions, and pressures which extend the Tolman VII exact solution are deduced from the new solutions. B... |
1506.02486 | Barun Majumder | Ahmed Farag Ali, Mir Faizal, Barun Majumder and Ravi Mistry | Gravitational Collapse in Gravity's Rainbow | accepted in Int. J. Geom. Methods Mod. Phys | Int.J.Geom.Meth.Mod.Phys. 12 (2015), 1550085 | 10.1142/S0219887815500851 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we will analyze the gravitational collapse in the framework of
gravity's rainbow. We will demonstrate that the position of the horizon for a
particle inside the black hole depends on the energy of that particle. It will
also be observe that the position of the horizon for a particle falling
radially in... | [
{
"created": "Thu, 21 May 2015 18:36:16 GMT",
"version": "v1"
}
] | 2015-07-01 | [
[
"Ali",
"Ahmed Farag",
""
],
[
"Faizal",
"Mir",
""
],
[
"Majumder",
"Barun",
""
],
[
"Mistry",
"Ravi",
""
]
] | In this paper, we will analyze the gravitational collapse in the framework of gravity's rainbow. We will demonstrate that the position of the horizon for a particle inside the black hole depends on the energy of that particle. It will also be observe that the position of the horizon for a particle falling radially into... |
2105.02191 | Andrey A. Shoom | Andrey A. Shoom, Pawan K. Gupta, Badri Krishnan, Alex B. Nielsen, and
Collin D. Capano | Testing GR with the Gravitational Wave Inspiral Signal GW170817 | 10 pages, 4 figures | null | 10.1007/s10714-023-03100-z | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Observations of gravitational waves from compact binary mergers have enabled
unique tests of general relativity in the dynamical and non-linear regimes. One
of the most important such tests are constraints on the post-Newtonian (PN)
corrections to the phase of the gravitational wave signal. The values of these
PN coe... | [
{
"created": "Wed, 5 May 2021 17:02:43 GMT",
"version": "v1"
}
] | 2023-05-03 | [
[
"Shoom",
"Andrey A.",
""
],
[
"Gupta",
"Pawan K.",
""
],
[
"Krishnan",
"Badri",
""
],
[
"Nielsen",
"Alex B.",
""
],
[
"Capano",
"Collin D.",
""
]
] | Observations of gravitational waves from compact binary mergers have enabled unique tests of general relativity in the dynamical and non-linear regimes. One of the most important such tests are constraints on the post-Newtonian (PN) corrections to the phase of the gravitational wave signal. The values of these PN coeff... |
2004.14775 | Milad Hajebrahimi | Kourosh Nozari and Milad Hajebrahimi | Geodesic Structure of the Quantum-Corrected Schwarzschild Black Hole
Surrounded by Quintessence | 42 pages, 24 figures | Int. J. Geom. Methods Mod. Phys (2022) 2250177 | 10.1142/S0219887822501778 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By considering the back-reaction of the spacetime through the spherically
symmetric quantum fluctuations of the background metric, Kazakov and Solodukhin
removed the singularity of the Schwarzschild black hole. This regular
Schwarzschild black hole has a spherical central region with a radius of the
order of the Plan... | [
{
"created": "Sat, 25 Apr 2020 06:07:10 GMT",
"version": "v1"
}
] | 2022-07-21 | [
[
"Nozari",
"Kourosh",
""
],
[
"Hajebrahimi",
"Milad",
""
]
] | By considering the back-reaction of the spacetime through the spherically symmetric quantum fluctuations of the background metric, Kazakov and Solodukhin removed the singularity of the Schwarzschild black hole. This regular Schwarzschild black hole has a spherical central region with a radius of the order of the Planck... |
1011.3477 | Bahram Mashhoon | C. Chicone, B. Mashhoon and K. Rosquist | Cosmic Jets | 4 pages, 1 figure; v2: improved version; v3: revised version accepted
for publication in Phys. Lett. A | Phys.Lett.A375:1427-1430,2011 | 10.1016/j.physleta.2011.02.036 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss time-dependent gravitational fields that "accelerate" free test
particles to the speed of light resulting in cosmic double-jet configurations.
It turns out that complete gravitational collapse along a spatial axis together
with corresponding expansion along the other two axes leads to the accelerated
motio... | [
{
"created": "Mon, 15 Nov 2010 18:57:11 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Dec 2010 18:54:54 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Feb 2011 23:26:49 GMT",
"version": "v3"
}
] | 2011-05-25 | [
[
"Chicone",
"C.",
""
],
[
"Mashhoon",
"B.",
""
],
[
"Rosquist",
"K.",
""
]
] | We discuss time-dependent gravitational fields that "accelerate" free test particles to the speed of light resulting in cosmic double-jet configurations. It turns out that complete gravitational collapse along a spatial axis together with corresponding expansion along the other two axes leads to the accelerated motion ... |
1301.0108 | Bernard Raffaelli | Bernard Raffaelli | A scattering approach to some aspects of the Schwarzschild Black Hole | 18 pages, 1 figure, JHEP accepted article | Journal of High Energy Physics January 2013, 2013:188 | 10.1007/JHEP01(2013)188 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider a massless field, with spin j, in interaction with
a Schwarzschild black hole in four dimensions, focusing mainly our study on the
s-wave scattering. First, using a Fourier analysis, we show that one can have a
simple and natural description of the Physics near the event horizon without
usi... | [
{
"created": "Tue, 1 Jan 2013 17:15:54 GMT",
"version": "v1"
}
] | 2013-02-07 | [
[
"Raffaelli",
"Bernard",
""
]
] | In this paper, we consider a massless field, with spin j, in interaction with a Schwarzschild black hole in four dimensions, focusing mainly our study on the s-wave scattering. First, using a Fourier analysis, we show that one can have a simple and natural description of the Physics near the event horizon without using... |
2105.09648 | Eleni-Alexandra Kontou | Eleni-Alexandra Kontou and Ken D. Olum | Eternal inflation, energy conditions and the role of decoherent
histories | Essay written for the Gravity Research Foundation 2021 Awards for
Essays on Gravitation, 5 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Eternal inflation, the idea that there is always a part of the universe that
is expanding exponentially, is a frequent feature of inflationary models. It
has been argued that eternal inflation requires the violation of energy
conditions, creating doubts for the validity of such models. We show that
eternal inflation ... | [
{
"created": "Thu, 20 May 2021 10:26:30 GMT",
"version": "v1"
}
] | 2021-05-21 | [
[
"Kontou",
"Eleni-Alexandra",
""
],
[
"Olum",
"Ken D.",
""
]
] | Eternal inflation, the idea that there is always a part of the universe that is expanding exponentially, is a frequent feature of inflationary models. It has been argued that eternal inflation requires the violation of energy conditions, creating doubts for the validity of such models. We show that eternal inflation is... |
0908.2949 | H\'ector Vucetich | Leonardo Amarilla and Hector Vucetich | Brane-world cosmology and varying $G$ | 26 pages, 3 figures | Int.J.Mod.Phys.A25:3835-3856,2010 | 10.1142/S0217751X10049700 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a brane-world cosmological model coupled to a bulk scalar field.
Since the brane tension turns out to be proportional to Newton coupling $G$, in
such a model a time variation of $G$ naturally occurs. By resorting to
available bounds on the variation of $G$, the parameters of the model are
constrained. The... | [
{
"created": "Thu, 20 Aug 2009 15:48:26 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Amarilla",
"Leonardo",
""
],
[
"Vucetich",
"Hector",
""
]
] | We consider a brane-world cosmological model coupled to a bulk scalar field. Since the brane tension turns out to be proportional to Newton coupling $G$, in such a model a time variation of $G$ naturally occurs. By resorting to available bounds on the variation of $G$, the parameters of the model are constrained. The c... |
1912.00616 | Mohd Shahalam | M. Shahalam, Mudhahir Al Ajmi, R. Myrzakulov, Anzhong Wang | Revisiting pre-inflationary universe of family of $\alpha-$attractor in
loop quantum cosmology | 18 pages, 6 caption figures, 4 tables, typos corrected | Class.Quant.Grav. 37 (2020) no.19, 195026 | 10.1088/1361-6382/aba486 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we revisit the dynamics of pre-inflationary universe with a
family of $\alpha-$attractor potentials, in the framework of loop quantum
cosmology, in which the big bang singularity is generically resolved purely
with quantum geometric effects, and replaced by a quantum bounce. At the
bounce, the backgroun... | [
{
"created": "Mon, 2 Dec 2019 08:04:58 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Dec 2019 09:54:52 GMT",
"version": "v2"
},
{
"created": "Thu, 19 Mar 2020 10:14:33 GMT",
"version": "v3"
}
] | 2020-09-22 | [
[
"Shahalam",
"M.",
""
],
[
"Ajmi",
"Mudhahir Al",
""
],
[
"Myrzakulov",
"R.",
""
],
[
"Wang",
"Anzhong",
""
]
] | In this work, we revisit the dynamics of pre-inflationary universe with a family of $\alpha-$attractor potentials, in the framework of loop quantum cosmology, in which the big bang singularity is generically resolved purely with quantum geometric effects, and replaced by a quantum bounce. At the bounce, the background ... |
gr-qc/0608134 | Sigbjorn Hervik | W. C. Lim, A. A. Coley, S. Hervik | Kinematic and Weyl singularities | 15 pages, 1 figure; v2: added more discussion throughout | Class.Quant.Grav. 24 (2007) 595-604 | 10.1088/0264-9381/24/3/005 | null | gr-qc astro-ph hep-th | null | We study the properties of a future singularity encountered by a perfect
fluid observer in tilting spatially homogeneous Bianchi cosmologies. We derive
the boost formulae for the Weyl tensor to establish that, for two observers
that are asymptotically null with respect to each other, their respective Weyl
parameters ... | [
{
"created": "Wed, 30 Aug 2006 13:35:26 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Dec 2006 21:04:59 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Lim",
"W. C.",
""
],
[
"Coley",
"A. A.",
""
],
[
"Hervik",
"S.",
""
]
] | We study the properties of a future singularity encountered by a perfect fluid observer in tilting spatially homogeneous Bianchi cosmologies. We derive the boost formulae for the Weyl tensor to establish that, for two observers that are asymptotically null with respect to each other, their respective Weyl parameters ge... |
2101.11392 | Bivudutta Mishra Dr. | B.Mishra, Fakhereh Md. Esmaeili, Pratik P. Ray, S.K. Tripathy | Stability analysis of two-fluid dark energy models | 12 pages, 7 figures, Accepted version Physica Scripta | Phys. Scr. 96 (2021) 045006 | 10.1088/1402-4896/abdf82 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have studied the stability of the cosmological models with
dark energy and combination of matter fields and dark energy in an anisotropic
space time. The pressure anisotropy along the spatial directions are derived
and its stability in each direction has been examined. The four models
presented here... | [
{
"created": "Tue, 26 Jan 2021 17:01:16 GMT",
"version": "v1"
}
] | 2021-03-02 | [
[
"Mishra",
"B.",
""
],
[
"Esmaeili",
"Fakhereh Md.",
""
],
[
"Ray",
"Pratik P.",
""
],
[
"Tripathy",
"S. K.",
""
]
] | In this paper, we have studied the stability of the cosmological models with dark energy and combination of matter fields and dark energy in an anisotropic space time. The pressure anisotropy along the spatial directions are derived and its stability in each direction has been examined. The four models presented here, ... |
1603.01936 | Vladimir Folomeev | Elizat Bakirova, Vladimir Folomeev | Dipole magnetic field of neutron stars in $f(R)$ gravity | 13 pages, 5 figures, corrections to content, two new figures added,
version published in GRG. arXiv admin note: text overlap with
arXiv:1501.06275 | Gen.Rel.Grav. 48 (2016) no.10, 135 | 10.1007/s10714-016-2127-1 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The structure of an interior dipole magnetic field of neutron stars in $f(R)$
gravity is considered. For this purpose, the perturbative approaches are used
when both the deviations from general relativity and the deformations of
spherically symmetric configurations associated with the presence of the
magnetic field a... | [
{
"created": "Mon, 7 Mar 2016 04:59:37 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Sep 2016 05:43:43 GMT",
"version": "v2"
}
] | 2016-09-21 | [
[
"Bakirova",
"Elizat",
""
],
[
"Folomeev",
"Vladimir",
""
]
] | The structure of an interior dipole magnetic field of neutron stars in $f(R)$ gravity is considered. For this purpose, the perturbative approaches are used when both the deviations from general relativity and the deformations of spherically symmetric configurations associated with the presence of the magnetic field are... |
1211.3390 | Owen Pavel Fern\'andez Piedra | Elcio Abdalla, Owen Pavel Fern\'andez Piedra, Fidel Sosa Nu\~nez,
Jeferson de Oliveira | Scalar field propagation in higher dimensional black holes at a Lifshitz
point | 26 pages, 9 figures, 6 tables | Phys. Rev. D 88, 064035 (2013) | 10.1103/PhysRevD.88.064035 | GEA-UCF 2012-03 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the complete time evolution of scalar fields propagating in
space-times of higher dimensional Lifshitz Black Holes with dynamical critical
exponent $z=2$, obtained from a theory including the most general quadratic
curvature corrections to Einstein-Hilbert gravity in $D$ dimensions. We also
computed the quas... | [
{
"created": "Wed, 14 Nov 2012 19:39:04 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Nov 2012 20:47:57 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Abdalla",
"Elcio",
""
],
[
"Piedra",
"Owen Pavel Fernández",
""
],
[
"Nuñez",
"Fidel Sosa",
""
],
[
"de Oliveira",
"Jeferson",
""
]
] | We study the complete time evolution of scalar fields propagating in space-times of higher dimensional Lifshitz Black Holes with dynamical critical exponent $z=2$, obtained from a theory including the most general quadratic curvature corrections to Einstein-Hilbert gravity in $D$ dimensions. We also computed the quasin... |
gr-qc/9909048 | M. J. Pareja | F. J. Chinea, M. J. Pareja | On some geometric features of the Kramer interior solution for a
rotating perfect fluid | LaTeX, 15 pages with 4 Poscript figures. To be published in Classical
and Quantum Gravity | Class.Quant.Grav. 16 (1999) 3823-3834 | 10.1088/0264-9381/16/12/305 | null | gr-qc | null | Geometric features (including convexity properties) of an exact interior
gravitational field due to a self-gravitating axisymmetric body of perfect
fluid in stationary, rigid rotation are studied. In spite of the seemingly
non-Newtonian features of the bounding surface for some rotation rates, we
show, by means of a ... | [
{
"created": "Wed, 15 Sep 1999 17:24:38 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Chinea",
"F. J.",
""
],
[
"Pareja",
"M. J.",
""
]
] | Geometric features (including convexity properties) of an exact interior gravitational field due to a self-gravitating axisymmetric body of perfect fluid in stationary, rigid rotation are studied. In spite of the seemingly non-Newtonian features of the bounding surface for some rotation rates, we show, by means of a de... |
1302.6902 | Yakov Shlapentokh-Rothman | Yakov Shlapentokh-Rothman | Quantitative Mode Stability for the Wave Equation on the Kerr Spacetime | Final version, to appear in Annales Henri Poincare | Annales Henri Poincar\'e 16 (2015), is. 1, 289-345 | 10.1007/s00023-014-0315-7 | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a quantitative refinement and simple proofs of mode stability type
statements for the wave equation on Kerr backgrounds in the full sub-extremal
range (|a| < M). As an application, we are able to quantitatively control the
energy flux along the horizon and null infinity and establish integrated local
energy d... | [
{
"created": "Wed, 27 Feb 2013 16:20:11 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Mar 2013 14:56:54 GMT",
"version": "v2"
},
{
"created": "Fri, 17 Jan 2014 16:01:58 GMT",
"version": "v3"
}
] | 2015-11-18 | [
[
"Shlapentokh-Rothman",
"Yakov",
""
]
] | We give a quantitative refinement and simple proofs of mode stability type statements for the wave equation on Kerr backgrounds in the full sub-extremal range (|a| < M). As an application, we are able to quantitatively control the energy flux along the horizon and null infinity and establish integrated local energy dec... |
1004.1255 | S. Hamid Mehdipour | S. Hamid Mehdipour | Charged particles' tunneling from a noncommutative charged black hole | 14 pages, 2 figures, new references added, to appear in IJMPA | Int.J.Mod.Phys.A25:5543-5555,2010 | 10.1142/S0217751X10051013 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the tunneling process of charged massive particles through the
quantum horizon of a Reissner-Nordstrom black hole in a new noncommutative
gravity scenario. In this model, the tunneling amplitude on account of
noncommutativity influences in the context of coordinate coherent states is
modified. Our calculatio... | [
{
"created": "Thu, 8 Apr 2010 07:01:46 GMT",
"version": "v1"
},
{
"created": "Wed, 5 May 2010 10:31:08 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Nov 2010 16:53:08 GMT",
"version": "v3"
}
] | 2010-12-02 | [
[
"Mehdipour",
"S. Hamid",
""
]
] | We apply the tunneling process of charged massive particles through the quantum horizon of a Reissner-Nordstrom black hole in a new noncommutative gravity scenario. In this model, the tunneling amplitude on account of noncommutativity influences in the context of coordinate coherent states is modified. Our calculation ... |
1907.07344 | Gauranga Samanta | Gauranga C. Samanta and Nisha Godani | Wormhole Modeling Supported by Non-Exotic Matter | 14 pages, 8 figures, to be appear in Modern Physics Letters A | null | 10.1142/S0217732319502249 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper, the modelling of traversale wormholes, proposed by
Morris \& Thorne \cite{morris1}, is performed within the $f(R)$ gravity with
particular viable case $f(R)=R-\mu R_c\Big(\frac{R}{R_c}\Big)^p$, where $\mu,
R_c>0$ and $0<p<1$. The energy conditions are analyzed using the shape function
$b(r)=\fra... | [
{
"created": "Wed, 17 Jul 2019 05:54:28 GMT",
"version": "v1"
}
] | 2019-07-18 | [
[
"Samanta",
"Gauranga C.",
""
],
[
"Godani",
"Nisha",
""
]
] | In the present paper, the modelling of traversale wormholes, proposed by Morris \& Thorne \cite{morris1}, is performed within the $f(R)$ gravity with particular viable case $f(R)=R-\mu R_c\Big(\frac{R}{R_c}\Big)^p$, where $\mu, R_c>0$ and $0<p<1$. The energy conditions are analyzed using the shape function $b(r)=\frac{... |
0905.3337 | Charmousis | Christos Charmousis, Blaise Gout\'eraux and Jiro Soda | Einstein-Maxwell-Dilaton theories with a Liouville potential | v3, Some typos corrected with respect to the published version | Phys.Rev.D80:024028,2009 | 10.1103/PhysRevD.80.024028 | LPT09-31 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find and analyse solutions of Einstein's equations in arbitrary d
dimensions and in the presence of a scalar field with a Liouville potential
coupled to a Maxwell field. We consider spacetimes of cylindrical symmetry or
again subspaces of dimension d-2 with constant curvature and analyse in detail
the field equati... | [
{
"created": "Wed, 20 May 2009 15:48:50 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Sep 2009 13:09:12 GMT",
"version": "v2"
},
{
"created": "Mon, 28 Jun 2010 12:41:40 GMT",
"version": "v3"
}
] | 2010-06-29 | [
[
"Charmousis",
"Christos",
""
],
[
"Goutéraux",
"Blaise",
""
],
[
"Soda",
"Jiro",
""
]
] | We find and analyse solutions of Einstein's equations in arbitrary d dimensions and in the presence of a scalar field with a Liouville potential coupled to a Maxwell field. We consider spacetimes of cylindrical symmetry or again subspaces of dimension d-2 with constant curvature and analyse in detail the field equation... |
1911.04920 | Ion Vasile Vancea | Ion V. Vancea | Field Line Solutions of the Einstein-Maxwell Equations | Published in An Essential Guide to Maxwell's Equations, Editor Casey
Erickson, Nova Science Publishers,
https://novapublishers.com/shop/an-essential-guide-to-maxwells-equations/ | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we are going to review the gravitating electromagnetic field
in the 1+3 formalism on a general hyperbolic space-time manifold. We also
discuss the recent results on the existence of the local field line solutions
of the Einstein-Maxwell equations that generalize the Ra\~{n}ada solutions from
the flat s... | [
{
"created": "Mon, 11 Nov 2019 14:58:14 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Mar 2020 11:52:28 GMT",
"version": "v2"
},
{
"created": "Sat, 11 Apr 2020 12:15:42 GMT",
"version": "v3"
},
{
"created": "Tue, 14 Apr 2020 12:21:20 GMT",
"version": "v4"
}
] | 2020-04-15 | [
[
"Vancea",
"Ion V.",
""
]
] | In this paper, we are going to review the gravitating electromagnetic field in the 1+3 formalism on a general hyperbolic space-time manifold. We also discuss the recent results on the existence of the local field line solutions of the Einstein-Maxwell equations that generalize the Ra\~{n}ada solutions from the flat spa... |
1609.06584 | Anshul Saini | Anshul Saini, Dejan Stojkovic | Hawking-like radiation and the density matrix for an infalling observer
during gravitational collapse | null | Phys.Rev. D94 (2016) no.6, 064028 | 10.1103/PhysRevD.94.064028 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study time-dependant Hawking-like radiation as seen by an infalling
observer during gravitational collapse of a thin shell. We calculate the
occupation number of particles whose frequencies are measured in the proper
time of an infalling observer in Eddington-Finkelstein coordinates. We solve
the equations for the... | [
{
"created": "Tue, 20 Sep 2016 04:43:42 GMT",
"version": "v1"
}
] | 2016-09-22 | [
[
"Saini",
"Anshul",
""
],
[
"Stojkovic",
"Dejan",
""
]
] | We study time-dependant Hawking-like radiation as seen by an infalling observer during gravitational collapse of a thin shell. We calculate the occupation number of particles whose frequencies are measured in the proper time of an infalling observer in Eddington-Finkelstein coordinates. We solve the equations for the w... |
gr-qc/9906023 | Modanese Giovanni | G. Modanese | Virtual dipoles and large fluctuations in quantum gravity | LaTeX, 8 pages | Phys.Lett. B460 (1999) 276-280 | 10.1016/S0370-2693(99)00804-7 | ECT*-99-8 | gr-qc | null | The positive energy theorem precludes the possibility of Minkowski flat space
decaying by any mechanism. In certain circumstances, however, large quantum
fluctuations of the gravitational field could arise---not only at the Planck
scale, but also at larger scales. This is because there exists a set of
localised weak ... | [
{
"created": "Sun, 6 Jun 1999 21:06:53 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Modanese",
"G.",
""
]
] | The positive energy theorem precludes the possibility of Minkowski flat space decaying by any mechanism. In certain circumstances, however, large quantum fluctuations of the gravitational field could arise---not only at the Planck scale, but also at larger scales. This is because there exists a set of localised weak fi... |
2405.01777 | Valeri Frolov P | Valeri P. Frolov | Spinoptics in a curved spacetime | 7 pages | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | In this paper we study propagation of the high frequency electromagnetic
waves in a curved spacetime. We discuss a so call spinoptics approach which
generalizes a well known geometric optics approximation and allows one to take
into account spin-dependent corrections. A new element proposed in this work is
the use of... | [
{
"created": "Thu, 2 May 2024 23:26:44 GMT",
"version": "v1"
},
{
"created": "Tue, 6 Aug 2024 17:41:43 GMT",
"version": "v2"
}
] | 2024-08-07 | [
[
"Frolov",
"Valeri P.",
""
]
] | In this paper we study propagation of the high frequency electromagnetic waves in a curved spacetime. We discuss a so call spinoptics approach which generalizes a well known geometric optics approximation and allows one to take into account spin-dependent corrections. A new element proposed in this work is the use of e... |
gr-qc/9803079 | Diego Pavon | Luis P. Chimento, and Diego Pavon | Inhomogeneous Universe Models with Varying Cosmological Term | 11 pages Latex. No figures. To be published in the GRG Journal | Gen.Rel.Grav. 30 (1998) 643-651 | 10.1023/A:1018826426240 | null | gr-qc | null | The evolution of a class of inhomogeneous spherically symmetric universe
models possessing a varying cosmological term and a material fluid, with an
adiabatic index either constant or not, is studied.
| [
{
"created": "Tue, 24 Mar 1998 18:15:07 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Chimento",
"Luis P.",
""
],
[
"Pavon",
"Diego",
""
]
] | The evolution of a class of inhomogeneous spherically symmetric universe models possessing a varying cosmological term and a material fluid, with an adiabatic index either constant or not, is studied. |
2010.00771 | Hidetoshi Omiya | Hidetoshi Omiya, Naoki Seto | Searching anomalous polarization modes of stochastic gravitational wave
background with LISA and Taiji | 11 pages, 9 figures | null | 10.1103/PhysRevD.102.084053 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The vector and scalar polarization modes of gravitational waves do not exist
in General Relativity, and their detection would have significant impacts on
fundamental physics. In this paper, we explored the detectability of these
anomalous polarization modes in a gravitational wave background around 1 mHz
with the fut... | [
{
"created": "Fri, 2 Oct 2020 04:20:59 GMT",
"version": "v1"
}
] | 2020-11-04 | [
[
"Omiya",
"Hidetoshi",
""
],
[
"Seto",
"Naoki",
""
]
] | The vector and scalar polarization modes of gravitational waves do not exist in General Relativity, and their detection would have significant impacts on fundamental physics. In this paper, we explored the detectability of these anomalous polarization modes in a gravitational wave background around 1 mHz with the futur... |
gr-qc/9810062 | Ioannis Giannakis | Ioannis Giannakis, K. Kleidis, K. Kuiroukidis and D. Papadopoulos | Anisotropic Null String Cosmologies | 9 pages, plain Tex | Mod.Phys.Lett. A13 (1998) 3169-3178 | 10.1142/S0217732398003375 | NYU-TH/98/10/01, RU98-11-B | gr-qc | null | We study string propagation in an anisotropic, cosmological background. We
solve the equations of motion and the constraints by performing a perturbative
expansion of the string coordinates in powers of c^2, the world-sheet speed of
light. To zeroth order the string is approximated by a tensionless string
(since c is... | [
{
"created": "Mon, 19 Oct 1998 22:17:34 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Giannakis",
"Ioannis",
""
],
[
"Kleidis",
"K.",
""
],
[
"Kuiroukidis",
"K.",
""
],
[
"Papadopoulos",
"D.",
""
]
] | We study string propagation in an anisotropic, cosmological background. We solve the equations of motion and the constraints by performing a perturbative expansion of the string coordinates in powers of c^2, the world-sheet speed of light. To zeroth order the string is approximated by a tensionless string (since c is p... |
gr-qc/0504077 | Jos\'e Wadih Maluf | J. W. Maluf | The gravitational energy-momentum tensor and the gravitational pressure | 16 pages, Latex file. Two references added. Revised in view of
Referee's comments. Accepted by Annalen der Physik | AnnalenPhys.14:723-732,2005 | 10.1002/andp.200510161 | null | gr-qc | null | In the framework of the teleparallel equivalent of general relativity it is
possible to establish the energy-momentum tensor of the gravitational field.
This tensor has the following essential features: (1) it is identified directly
in Einstein's field equations; (2) it is conserved and traceless; (3) it yields
expre... | [
{
"created": "Mon, 18 Apr 2005 13:41:03 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jul 2005 19:50:55 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Maluf",
"J. W.",
""
]
] | In the framework of the teleparallel equivalent of general relativity it is possible to establish the energy-momentum tensor of the gravitational field. This tensor has the following essential features: (1) it is identified directly in Einstein's field equations; (2) it is conserved and traceless; (3) it yields express... |
1301.4217 | Saibal Ray | Farook Rahaman, P. K. F. Kuhfittig, B. C. Bhui, Masiur Rahaman, Saibal
Ray and U. F. Mondal | BTZ black holes inspired by noncommutative geometry | 8 pages, 10 figures, Minor changes in the text, Accepted in Physical
Review D | null | 10.1103/PhysRevD.87.084014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper a Banados, Teitelboim and Zanelli (BTZ) black hole is
constructed from an exact solution of the Einstein field equations in a
(2+1)-dimensional anti-de Sitter spacetime in the context of noncommutative
geometry. The BTZ black hole turns out to have two horizons, no horizon or a
single horizon correspond... | [
{
"created": "Thu, 17 Jan 2013 12:40:07 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Jan 2013 12:36:31 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Mar 2013 11:16:07 GMT",
"version": "v3"
}
] | 2015-06-12 | [
[
"Rahaman",
"Farook",
""
],
[
"Kuhfittig",
"P. K. F.",
""
],
[
"Bhui",
"B. C.",
""
],
[
"Rahaman",
"Masiur",
""
],
[
"Ray",
"Saibal",
""
],
[
"Mondal",
"U. F.",
""
]
] | In this paper a Banados, Teitelboim and Zanelli (BTZ) black hole is constructed from an exact solution of the Einstein field equations in a (2+1)-dimensional anti-de Sitter spacetime in the context of noncommutative geometry. The BTZ black hole turns out to have two horizons, no horizon or a single horizon correspondin... |
gr-qc/9812087 | K. Srinivasan | K. Srinivasan and T. Padmanabhan | Doing it with Mirrors: Classical analogues for Black Hole radiation | 14 pages, Latex file | null | null | IUCAA 48/98 | gr-qc hep-th | null | We construct analogues for the quantum phenomena of black hole radiation in
the context of {\it classical field theory}. Hawking radiation from a
(radially) collapsing star is mathematically equivalent to radiation from a
mirror moving along a specific trajectory in Minkowski spacetime. We construct
a classical analo... | [
{
"created": "Sun, 27 Dec 1998 17:37:11 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Srinivasan",
"K.",
""
],
[
"Padmanabhan",
"T.",
""
]
] | We construct analogues for the quantum phenomena of black hole radiation in the context of {\it classical field theory}. Hawking radiation from a (radially) collapsing star is mathematically equivalent to radiation from a mirror moving along a specific trajectory in Minkowski spacetime. We construct a classical analogu... |
2003.12832 | Aditya Vijaykumar | Aditya Vijaykumar, Shasvath J. Kapadia, Parameswaran Ajith | Constraints on the time variation of the gravitational constant using
gravitational-wave observations of binary neutron stars | 5 pages, 4 figures, resembles the version published in Phys. Rev.
Lett | Phys. Rev. Lett. 126, 141104 (2021) | 10.1103/PhysRevLett.126.141104 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a method to constrain the variation of the gravitational constant
$G$ with cosmic time using gravitational-wave (GW) observations of merging
binary neutron stars. The method essentially relies on the fact that the
maximum and minimum allowed masses of neutron stars at a particular cosmic
epoch has a simple... | [
{
"created": "Sat, 28 Mar 2020 16:13:27 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Apr 2021 07:32:27 GMT",
"version": "v2"
}
] | 2021-04-19 | [
[
"Vijaykumar",
"Aditya",
""
],
[
"Kapadia",
"Shasvath J.",
""
],
[
"Ajith",
"Parameswaran",
""
]
] | We propose a method to constrain the variation of the gravitational constant $G$ with cosmic time using gravitational-wave (GW) observations of merging binary neutron stars. The method essentially relies on the fact that the maximum and minimum allowed masses of neutron stars at a particular cosmic epoch has a simple d... |
gr-qc/0212023 | Alejandro Corichi | Alejandro Corichi, Jeronimo Cortez, Hernando Quevedo | Note on Canonical Quantization and Unitary Equivalence in Field Theory | 12 pages, no figures, revtex4. Discussion clarified, same conclusions | Class.Quant.Grav. 20 (2003) L83 | 10.1088/0264-9381/20/7/101 | ICN-UNAM-02-08 | gr-qc hep-th | null | The problem of defining and constructing representations of the Canonical
Commutation Relations can be systematically approached via the technique of
{\it algebraic quantization}. In particular, when the phase space of the system
is linear and finite dimensional, the `vertical polarization' provides an
unambiguous qu... | [
{
"created": "Thu, 5 Dec 2002 20:21:00 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Mar 2003 16:49:51 GMT",
"version": "v2"
}
] | 2017-08-23 | [
[
"Corichi",
"Alejandro",
""
],
[
"Cortez",
"Jeronimo",
""
],
[
"Quevedo",
"Hernando",
""
]
] | The problem of defining and constructing representations of the Canonical Commutation Relations can be systematically approached via the technique of {\it algebraic quantization}. In particular, when the phase space of the system is linear and finite dimensional, the `vertical polarization' provides an unambiguous quan... |
gr-qc/9505052 | Jose Ademir Sales de Lima | J.A.S. Lima (Brown Univ.) and A. Maia (Campinas) | THERMODYNAMIC PROPERTIES OF $\gamma$--FLUIDS AND THE QUANTUM VACCUM | 20 pages, uses LATEX | Phys.Rev. D52 (1995) 5628-5635 | 10.1103/PhysRevD.52.5628 | BROWN-HET-992 | gr-qc | null | The thermodynamic behaviour of a relativistic perfect simple fluid obeying
the equation of state $p=(\gamma-1)\rho $, where $0 \le \gamma \le 2$ is a
constant, has been investigated. Particular cases include: vacuum($p=-\rho $,
$\gamma=0$), a randomly oriented distribution of cosmic strings ($p=-{1 \over
3} \rho $, $... | [
{
"created": "Wed, 31 May 1995 14:30:02 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Lima",
"J. A. S.",
"",
"Brown Univ."
],
[
"Maia",
"A.",
"",
"Campinas"
]
] | The thermodynamic behaviour of a relativistic perfect simple fluid obeying the equation of state $p=(\gamma-1)\rho $, where $0 \le \gamma \le 2$ is a constant, has been investigated. Particular cases include: vacuum($p=-\rho $, $\gamma=0$), a randomly oriented distribution of cosmic strings ($p=-{1 \over 3} \rho $, $\g... |
1304.0369 | Lee Samuel Finn | Lee Samuel Finn and Joseph D. Romano | A R{\o}mer time-delay determination of the gravitational-wave
propagation speed | 12 pages, 1 figure, submitted to PRD | null | 10.1103/PhysRevD.88.022001 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In 1676 Olaus R{\o}mer presented the first observational evidence for a
finite light velocity $\cem$. He formed his estimate by attributing the
periodically varying discrepancy between the observed and expected occultation
times of the Galilean satellite Io by its planetary host Jupiter to the time it
takes light to ... | [
{
"created": "Mon, 1 Apr 2013 14:51:12 GMT",
"version": "v1"
}
] | 2015-06-15 | [
[
"Finn",
"Lee Samuel",
""
],
[
"Romano",
"Joseph D.",
""
]
] | In 1676 Olaus R{\o}mer presented the first observational evidence for a finite light velocity $\cem$. He formed his estimate by attributing the periodically varying discrepancy between the observed and expected occultation times of the Galilean satellite Io by its planetary host Jupiter to the time it takes light to cr... |
gr-qc/0307025 | Ari Peltola | Jarmo Makela, Ari Peltola | Spacetime Foam Model of the Schwarzschild Horizon | 16 pages, 2 figures, improved and extended version with some
significant changes. Accepted for publication in Phys.Rev.D | Phys.Rev. D69 (2004) 124008 | 10.1103/PhysRevD.69.124008 | null | gr-qc | null | We consider a spacetime foam model of the Schwarzschild horizon, where the
horizon consists of Planck size black holes. According to our model the entropy
of the Schwarzschild black hole is proportional to the area of its event
horizon. It is possible to express geometrical arguments to the effect that the
constant o... | [
{
"created": "Mon, 7 Jul 2003 09:04:36 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Mar 2004 14:37:32 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Makela",
"Jarmo",
""
],
[
"Peltola",
"Ari",
""
]
] | We consider a spacetime foam model of the Schwarzschild horizon, where the horizon consists of Planck size black holes. According to our model the entropy of the Schwarzschild black hole is proportional to the area of its event horizon. It is possible to express geometrical arguments to the effect that the constant of ... |
1903.04593 | Giulia Gubitosi | Giulia Gubitosi, Sjors Heefer | Relativistic compatibility of the interacting $\kappa$-Poincar\'e model
and implications for the relative locality framework | 23 pages, 3 figures | Phys. Rev. D 99, 086019 (2019) | 10.1103/PhysRevD.99.086019 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the relativistic properties under boost transformations of the
$\kappa$-Poincar\'e model with multiple causally connected interactions, both
at the level of its formulation in momentum space only and when it is endowed
with a full phase space construction, provided by the relative locality
framework. P... | [
{
"created": "Mon, 11 Mar 2019 20:36:27 GMT",
"version": "v1"
}
] | 2019-05-08 | [
[
"Gubitosi",
"Giulia",
""
],
[
"Heefer",
"Sjors",
""
]
] | We investigate the relativistic properties under boost transformations of the $\kappa$-Poincar\'e model with multiple causally connected interactions, both at the level of its formulation in momentum space only and when it is endowed with a full phase space construction, provided by the relative locality framework. Pre... |
gr-qc/0001095 | Ilja Schmelzer | I. Schmelzer | A Metric Theory of Gravity with Condensed Matter Interpretation | 16 pages Latex, no figures. Short version of gr-qc/0001101. (The
"original" version was a duplicate of gr-qc/0001101 created by a mistake.) | null | null | WIAS Preprint 549 | gr-qc | null | We consider a classical condensed matter theory in a Newtonian framework
where conservation laws
\partial_t \rho + \partial_i (\rho v^i) = 0
\partial_t (\rho v^j) + \partial_i(\rho v^i v^j + p^{ij}) = 0
are related with the Lagrange formalism in a natural way. For an ``effective
Lorentz metric'' g_{\mu\nu} it i... | [
{
"created": "Fri, 28 Jan 2000 13:58:36 GMT",
"version": "v1"
},
{
"created": "Tue, 16 May 2000 15:32:30 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Schmelzer",
"I.",
""
]
] | We consider a classical condensed matter theory in a Newtonian framework where conservation laws \partial_t \rho + \partial_i (\rho v^i) = 0 \partial_t (\rho v^j) + \partial_i(\rho v^i v^j + p^{ij}) = 0 are related with the Lagrange formalism in a natural way. For an ``effective Lorentz metric'' g_{\mu\nu} it is equiva... |
1305.0443 | Johan Noldus | Johan Noldus | Free Fermions on causal sets | minor corrections made | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a Dirac theory on causal sets; a key element in the construction
being that the causet must be regarded as emergent in an appropriate sense too.
We further notice that mixed norm spaces appear in the construction allowing
for negative norm particles and "ghosts".
| [
{
"created": "Thu, 2 May 2013 14:31:27 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Oct 2014 12:14:28 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Jan 2015 13:11:37 GMT",
"version": "v3"
}
] | 2015-01-27 | [
[
"Noldus",
"Johan",
""
]
] | We construct a Dirac theory on causal sets; a key element in the construction being that the causet must be regarded as emergent in an appropriate sense too. We further notice that mixed norm spaces appear in the construction allowing for negative norm particles and "ghosts". |
2111.04097 | Natascha Riahi | Natascha Riahi | How to use Unimodular Quantum Cosmology for the Prediction of a
late-time Classical Universe? | 7 pages, based on a talk given at 15th Marcel Grossmann Meeting,
Rome, 1-7 July 2018 | null | 10.1142/9789811258251_0054 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Unimodular quantum cosmology admits wavepacket solutions that evolve
according to a kind of Schr\"odinger equation. Though this theory is equivalent
to general relativity on the classical level, its canonical structure is
different and the problem of time does not occur. We present an Ehrenfest
theorem for the long t... | [
{
"created": "Sun, 7 Nov 2021 14:20:39 GMT",
"version": "v1"
}
] | 2022-12-07 | [
[
"Riahi",
"Natascha",
""
]
] | Unimodular quantum cosmology admits wavepacket solutions that evolve according to a kind of Schr\"odinger equation. Though this theory is equivalent to general relativity on the classical level, its canonical structure is different and the problem of time does not occur. We present an Ehrenfest theorem for the long ter... |
0902.3766 | M Hossain Ali | M. Atiqur Rahman and M. Hossain Ali | Transverse Wave Propagation in Relativistic Two-fluid Plasmas around
Reissner-Nordstr\"{o}m-de Sitter Black Hole | 22 pages, 8 figures | Gen.Rel.Grav.42:1623-1648,2010 | 10.1007/s10714-010-0934-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The transverse electromagnetic waves propagating in a relativistic two-fluid
plasma influenced by the gravitational field of the Reissner-Nordstr\"{o}m-de
Sitter black hole has been investigated exploiting 3+1 split of spacetime.
Reformulating the two-fluid equations, the set of simultaneous linear equations
for the ... | [
{
"created": "Sun, 22 Feb 2009 03:35:51 GMT",
"version": "v1"
}
] | 2014-11-18 | [
[
"Rahman",
"M. Atiqur",
""
],
[
"Ali",
"M. Hossain",
""
]
] | The transverse electromagnetic waves propagating in a relativistic two-fluid plasma influenced by the gravitational field of the Reissner-Nordstr\"{o}m-de Sitter black hole has been investigated exploiting 3+1 split of spacetime. Reformulating the two-fluid equations, the set of simultaneous linear equations for the pe... |
2206.00440 | Soham Sen | Neeraj Kumar, Soham Sen and Sunandan Gangopadhyay | Phase transition structure and breaking of universal nature of central
charge criticality in a Born-Infeld $AdS$ black hole | This revised version of the manuscript has been accepted for
publication in Physical Review D | Physical Review D 106 (2022) 026005 | 10.1103/PhysRevD.106.026005 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper we have considered the thermodynamics of a Born-Infeld $AdS$
black hole using inputs from the dual boundary field theory. Here, we have
varied the cosmological constant $\Lambda$ and the Newton's gravitational
constant $G$ along with the Born-Infeld parameter $b$ in the bulk. A novel
universal critical ... | [
{
"created": "Wed, 18 May 2022 07:04:08 GMT",
"version": "v1"
},
{
"created": "Thu, 7 Jul 2022 02:48:09 GMT",
"version": "v2"
}
] | 2022-07-20 | [
[
"Kumar",
"Neeraj",
""
],
[
"Sen",
"Soham",
""
],
[
"Gangopadhyay",
"Sunandan",
""
]
] | In this paper we have considered the thermodynamics of a Born-Infeld $AdS$ black hole using inputs from the dual boundary field theory. Here, we have varied the cosmological constant $\Lambda$ and the Newton's gravitational constant $G$ along with the Born-Infeld parameter $b$ in the bulk. A novel universal critical be... |
gr-qc/0610082 | Roman Konoplya | R. A. Konoplya | Particle motion around magnetized black holes: Preston-Poisson
space-time | 6 pages, RevTex, the version accepted for publication in Phys. Rev. D | Phys.Rev.D74:124015,2006 | 10.1103/PhysRevD.74.124015 | null | gr-qc astro-ph hep-th | null | We analyze motion of massless and massive particles around black holes
immersed in an asymptotically uniform magnetic field and surrounded by some
mechanical structure, which provides the magnetic field. The space-time is
described by Preston-Poisson metric, which is the generalization of the
well-known Ernst metric ... | [
{
"created": "Mon, 16 Oct 2006 13:15:14 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Dec 2006 18:19:50 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Konoplya",
"R. A.",
""
]
] | We analyze motion of massless and massive particles around black holes immersed in an asymptotically uniform magnetic field and surrounded by some mechanical structure, which provides the magnetic field. The space-time is described by Preston-Poisson metric, which is the generalization of the well-known Ernst metric wi... |
gr-qc/9707024 | Bill Hiscock | William A. Hiscock (Montana State University) | Quantum effects in the Alcubierre warp drive spacetime | 9 pages, ReVTeX | Class.Quant.Grav.14:L183-L188,1997 | 10.1088/0264-9381/14/11/002 | MSUPHY97.12 | gr-qc | null | The expectation value of the stress-energy tensor of a free conformally
invariant scalar field is computed in a two-dimensional reduction of the
Alcubierre ``warp drive'' spacetime. The stress-energy is found to diverge if
the apparent velocity of the spaceship exceeds the speed of light. If such
behavior occurs in f... | [
{
"created": "Thu, 10 Jul 1997 18:29:53 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Hiscock",
"William A.",
"",
"Montana State University"
]
] | The expectation value of the stress-energy tensor of a free conformally invariant scalar field is computed in a two-dimensional reduction of the Alcubierre ``warp drive'' spacetime. The stress-energy is found to diverge if the apparent velocity of the spaceship exceeds the speed of light. If such behavior occurs in fou... |
1501.00855 | Christoph Charles | Christoph Charles, Etera R. Livine | Closure constraints for hyperbolic tetrahedra | 24 pages | Class.Quant.Grav. 32 (2015) 13, 135003 | 10.1088/0264-9381/32/13/135003 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the generalization of loop gravity's twisted geometries to a
q-deformed gauge group. In the standard undeformed case, loop gravity is a
formulation of general relativity as a diffeomorphism-invariant SU(2) gauge
theory. Its classical states are graphs provided with algebraic data. In
particular closure... | [
{
"created": "Mon, 5 Jan 2015 13:34:13 GMT",
"version": "v1"
}
] | 2015-10-23 | [
[
"Charles",
"Christoph",
""
],
[
"Livine",
"Etera R.",
""
]
] | We investigate the generalization of loop gravity's twisted geometries to a q-deformed gauge group. In the standard undeformed case, loop gravity is a formulation of general relativity as a diffeomorphism-invariant SU(2) gauge theory. Its classical states are graphs provided with algebraic data. In particular closure c... |
1002.2433 | Eric Greenwood | Eric Greenwood | Time Evolution of Entropy of a Charged Domain Wall during Gravitational
Collapse | 10 pages with 6 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the time evolution of the entropy of a collapsing charged spherical
domain wall, from the point of view of an asymptotic observer, by investigating
the entropy of the entire system (i.e. charged domain wall and radiation) and
induced radiation alone during the collapse. By taking the difference, we find
the ... | [
{
"created": "Thu, 11 Feb 2010 21:05:39 GMT",
"version": "v1"
}
] | 2010-02-18 | [
[
"Greenwood",
"Eric",
""
]
] | We study the time evolution of the entropy of a collapsing charged spherical domain wall, from the point of view of an asymptotic observer, by investigating the entropy of the entire system (i.e. charged domain wall and radiation) and induced radiation alone during the collapse. By taking the difference, we find the en... |
1311.3135 | Joao Magueijo | Giovanni Amelino-Camelia, Michele Arzano, Giulia Gubitosi, Joao
Magueijo | Planck-scale dimensional reduction without a preferred frame | null | null | 10.1016/j.physletb.2014.07.030 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Several approaches to quantum gravity suggest that the standard description
of spacetime as probed at low-energy, with four dimensions, is replaced in the
Planckian regime by a spacetime with a spectral dimension of two. The
implications for relativistic symmetries can be momentous, and indeed the most
tangible pictu... | [
{
"created": "Wed, 13 Nov 2013 14:12:50 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Amelino-Camelia",
"Giovanni",
""
],
[
"Arzano",
"Michele",
""
],
[
"Gubitosi",
"Giulia",
""
],
[
"Magueijo",
"Joao",
""
]
] | Several approaches to quantum gravity suggest that the standard description of spacetime as probed at low-energy, with four dimensions, is replaced in the Planckian regime by a spacetime with a spectral dimension of two. The implications for relativistic symmetries can be momentous, and indeed the most tangible picture... |
1003.5696 | Arkady Kholodenko L. | Arkady L. Kholodenko | Role of general relativity and quantum mechanics in dynamics of Solar
System | 41 pages | Adv.Stud.Theor.Phys. 4:689-736,2010 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Let m(i) be the mass of i-th planet and M be the Solar mass. From
astronomical data it is known that ratios r(i)=m(i)/(m(i)+M) are of order
10^(-3)-10^(-6) for all planets. The same is true for all satellites of heavy
planets. These results suggest that Einstein's treatment of Mercury dynamics
can be extended to almo... | [
{
"created": "Mon, 29 Mar 2010 23:01:34 GMT",
"version": "v1"
}
] | 2011-03-28 | [
[
"Kholodenko",
"Arkady L.",
""
]
] | Let m(i) be the mass of i-th planet and M be the Solar mass. From astronomical data it is known that ratios r(i)=m(i)/(m(i)+M) are of order 10^(-3)-10^(-6) for all planets. The same is true for all satellites of heavy planets. These results suggest that Einstein's treatment of Mercury dynamics can be extended to almost... |
2104.11269 | Subhajit Barman | Dipankar Barman, Subhajit Barman, Bibhas Ranjan Majhi | Role of thermal field in entanglement harvesting between two accelerated
Unruh-DeWitt detectors | Modified version, to appear in JHEP | JHEP07(2021)124 | 10.1007/JHEP07(2021)124 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the effects of field temperature $T^{(f)}$ on the entanglement
harvesting between two uniformly accelerated detectors. For their parallel
motion, the thermal nature of fields does not produce any entanglement, and
therefore, the outcome is the same as the non-thermal situation. On the
contrary, $T^{(f)... | [
{
"created": "Thu, 22 Apr 2021 18:18:17 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Jun 2021 14:09:57 GMT",
"version": "v2"
}
] | 2021-07-28 | [
[
"Barman",
"Dipankar",
""
],
[
"Barman",
"Subhajit",
""
],
[
"Majhi",
"Bibhas Ranjan",
""
]
] | We investigate the effects of field temperature $T^{(f)}$ on the entanglement harvesting between two uniformly accelerated detectors. For their parallel motion, the thermal nature of fields does not produce any entanglement, and therefore, the outcome is the same as the non-thermal situation. On the contrary, $T^{(f)}$... |
1309.6294 | Thomas Murphy Jr. | T. W. Murphy Jr | Lunar laser ranging: the millimeter challenge | 45 page review article; 20 figures | Reports on Progress in Physics: 76, 076901 (2013) | 10.1088/0034-4885/76/7/076901 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Lunar laser ranging has provided many of the best tests of gravitation since
the first Apollo astronauts landed on the Moon. The march to higher precision
continues to this day, now entering the millimeter regime, and promising
continued improvement in scientific results. This review introduces key aspects
of the tec... | [
{
"created": "Tue, 24 Sep 2013 19:22:57 GMT",
"version": "v1"
}
] | 2013-09-25 | [
[
"Murphy",
"T. W.",
"Jr"
]
] | Lunar laser ranging has provided many of the best tests of gravitation since the first Apollo astronauts landed on the Moon. The march to higher precision continues to this day, now entering the millimeter regime, and promising continued improvement in scientific results. This review introduces key aspects of the techn... |
2407.07449 | Chao Zhang | Chao Zhang, Yungui Gong | Probing new fundamental fields with Extreme Mass Ratio Inspirals | 29 pages, 10 figures; comments are welcome | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine extreme mass ratio inspirals (EMRIs), where a charged compact
object spirals into a supermassive black hole, in modified gravity theories
with additional scalar or vector fields. Using the Teukolsky and generalized
Sasaki-Nakamura formalisms, we provide the post-Newtonian expansion of the
energy flux of th... | [
{
"created": "Wed, 10 Jul 2024 08:07:10 GMT",
"version": "v1"
}
] | 2024-07-11 | [
[
"Zhang",
"Chao",
""
],
[
"Gong",
"Yungui",
""
]
] | We examine extreme mass ratio inspirals (EMRIs), where a charged compact object spirals into a supermassive black hole, in modified gravity theories with additional scalar or vector fields. Using the Teukolsky and generalized Sasaki-Nakamura formalisms, we provide the post-Newtonian expansion of the energy flux of the ... |
1908.03695 | Ze Luan | Ze Luan and Taotao Qiu | Towards degeneracy breaking of early universe models | 13 pages,6 figures, comments welcome | Phys. Rev. D 101, 023517 (2020) | 10.1103/PhysRevD.101.023517 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There are many possibilities of scenarios in the early universe, which can
give rise to the same observational signals due to the degeneracy among each
other, caused by equivalence under the conformal transformations. In order to
break the degeneracy, in this paper we take into account the so-called
"frame-invariant ... | [
{
"created": "Sat, 10 Aug 2019 05:42:28 GMT",
"version": "v1"
}
] | 2020-01-29 | [
[
"Luan",
"Ze",
""
],
[
"Qiu",
"Taotao",
""
]
] | There are many possibilities of scenarios in the early universe, which can give rise to the same observational signals due to the degeneracy among each other, caused by equivalence under the conformal transformations. In order to break the degeneracy, in this paper we take into account the so-called "frame-invariant va... |
gr-qc/0607078 | Betti Hartmann | Yves Brihaye (Universite de Mons, Belgium), Betti Hartmann
(International University Bremen, Germany), Eugen Radu (National University
of Ireland Maynooth, Ireland) and Cristian Stelea (University of Waterloo,
Canada) | Cosmological monopoles and non-abelian black holes | 24 pages + 12 figures; figure changed | Nucl.Phys.B763:115-146,2007 | 10.1016/j.nuclphysb.2006.11.011 | null | gr-qc hep-th | null | We discuss magnetic monopole solutions of the Einstein-Yang-Mills-Higgs
equations with a positive cosmological constant. These configurations approach
asymptotically the de Sitter spacetime background and exist only for a nonzero
Higgs potential. We find that the total mass of the solutions within the
cosmological ho... | [
{
"created": "Thu, 20 Jul 2006 08:05:42 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Oct 2006 10:01:40 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Brihaye",
"Yves",
"",
"Universite de Mons, Belgium"
],
[
"Hartmann",
"Betti",
"",
"International University Bremen, Germany"
],
[
"Radu",
"Eugen",
"",
"National University\n of Ireland Maynooth, Ireland"
],
[
"Stelea",
"Cristian",
"",
"... | We discuss magnetic monopole solutions of the Einstein-Yang-Mills-Higgs equations with a positive cosmological constant. These configurations approach asymptotically the de Sitter spacetime background and exist only for a nonzero Higgs potential. We find that the total mass of the solutions within the cosmological hori... |
1707.06780 | Herbert Balasin | Herbert Balasin and Peter C. Aichelburg | Scattering of Classical and Quantum Particles by Impulsive Fields | 16 pages, 1 figure | null | 10.1088/1361-6382/aab626 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the scattering of classical and quantum particles in impulsive
backgrounds fields. These fields model short outbursts of radiation propagating
with the speed of light. The singular nature of the problem will be accounted
for by the use of Colombeau's generalized function which however give rise to
ambi... | [
{
"created": "Fri, 21 Jul 2017 07:25:51 GMT",
"version": "v1"
}
] | 2018-04-18 | [
[
"Balasin",
"Herbert",
""
],
[
"Aichelburg",
"Peter C.",
""
]
] | We investigate the scattering of classical and quantum particles in impulsive backgrounds fields. These fields model short outbursts of radiation propagating with the speed of light. The singular nature of the problem will be accounted for by the use of Colombeau's generalized function which however give rise to ambigu... |
2007.15662 | Roberto Oliveri | F. Camilloni, G. Grignani, T. Harmark, R. Oliveri, M. Orselli | Force-free magnetosphere attractors for near-horizon extreme and
near-extreme limits of Kerr black hole | v1: 5 pages, 1 figure; v2: 7 pages, 2 figures, matches published
version | Class. Quantum Grav. 38 075022 (2021) | 10.1088/1361-6382/abdf70 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new approach to find magnetically-dominated force-free
magnetospheres around highly spinning black holes, relevant for models of
astrophysical jets. Employing the near-horizon extreme Kerr (NHEK) limit of the
Kerr black hole, any stationary, axisymmetric and regular force-free
magnetosphere reduces to th... | [
{
"created": "Thu, 30 Jul 2020 18:00:03 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Mar 2021 17:31:14 GMT",
"version": "v2"
}
] | 2021-03-17 | [
[
"Camilloni",
"F.",
""
],
[
"Grignani",
"G.",
""
],
[
"Harmark",
"T.",
""
],
[
"Oliveri",
"R.",
""
],
[
"Orselli",
"M.",
""
]
] | We propose a new approach to find magnetically-dominated force-free magnetospheres around highly spinning black holes, relevant for models of astrophysical jets. Employing the near-horizon extreme Kerr (NHEK) limit of the Kerr black hole, any stationary, axisymmetric and regular force-free magnetosphere reduces to the ... |
0711.4513 | Helmut Friedrich | Helmut Friedrich | Conformal classes of asymptotically flat, static vacuum data | 23 pages | Class.Quant.Grav.25:065012,2008 | 10.1088/0264-9381/25/6/065012 | null | gr-qc | null | We show that time-reflection symmetric, asymptotically flat, static vacuum
data which admit a non-trivial conformal rescaling which leads again to such
data must be axi-symmetric and admit a conformal Killing field. Moreover, it is
shown that there exists a 3-parameter family of such data.
| [
{
"created": "Wed, 28 Nov 2007 14:40:42 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Feb 2008 14:30:44 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Friedrich",
"Helmut",
""
]
] | We show that time-reflection symmetric, asymptotically flat, static vacuum data which admit a non-trivial conformal rescaling which leads again to such data must be axi-symmetric and admit a conformal Killing field. Moreover, it is shown that there exists a 3-parameter family of such data. |
1501.07629 | Roldao da Rocha | A. Herrera-Aguilar, A. M. Kuerten, Roldao da Rocha | Regular Bulk Solutions in Brane-worlds with Inhomogeneous Dust and
Generalized Dark Radiation | 26 pages, 14 figures | Adv. High Energy Phys. 2015 (2015) 359268 | 10.1155/2015/359268 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | From the dynamics of a brane-world with matter fields present in the bulk,
the bulk metric and the black string solution near the brane are generalized,
when both the dynamics of inhomogeneous dust/generalized dark radiation on the
brane-world and inhomogeneous dark radiation in the bulk as well are considered
-- as ... | [
{
"created": "Thu, 29 Jan 2015 22:16:44 GMT",
"version": "v1"
}
] | 2015-02-02 | [
[
"Herrera-Aguilar",
"A.",
""
],
[
"Kuerten",
"A. M.",
""
],
[
"da Rocha",
"Roldao",
""
]
] | From the dynamics of a brane-world with matter fields present in the bulk, the bulk metric and the black string solution near the brane are generalized, when both the dynamics of inhomogeneous dust/generalized dark radiation on the brane-world and inhomogeneous dark radiation in the bulk as well are considered -- as ex... |
gr-qc/0010083 | Victor Berezin | V.A.Berezin | Vector-like Einstein's equations for D-dimensional spherical gravity
with (D-2)-dimensional sphere | LaTex file, no figures | null | null | null | gr-qc | null | We demonstrate how the Einstein's equations for the $D$-dimensional spherical
gravity can be written in the covariant vector-like form. These equations
reveal easily the causal structure of curved spherically symmetric manifolds
and may appear useful in investigation of different models of brane universes.
| [
{
"created": "Mon, 23 Oct 2000 13:09:46 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Berezin",
"V. A.",
""
]
] | We demonstrate how the Einstein's equations for the $D$-dimensional spherical gravity can be written in the covariant vector-like form. These equations reveal easily the causal structure of curved spherically symmetric manifolds and may appear useful in investigation of different models of brane universes. |
1610.07401 | Gerardo Morsella | Sergio Doplicher, Klaus Fredenhagen, Gerardo Morsella, Nicola
Pinamonti | Pale Glares of Dark Matter in Quantum Spacetime | 14 pages | Phys. Rev. D 95, 065009 (2017) | 10.1103/PhysRevD.95.065009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A U(1) gauge theory turns, on physically motivated models of Quantum
Spacetime, into a U($\infty$) gauge theory, hence free classical
electrodynamics is no longer free and neutral fields may have electromagnetic
interactions. We discuss the last point for scalar fields, possibly describing
dark matter; we have in min... | [
{
"created": "Mon, 24 Oct 2016 13:34:35 GMT",
"version": "v1"
}
] | 2017-03-22 | [
[
"Doplicher",
"Sergio",
""
],
[
"Fredenhagen",
"Klaus",
""
],
[
"Morsella",
"Gerardo",
""
],
[
"Pinamonti",
"Nicola",
""
]
] | A U(1) gauge theory turns, on physically motivated models of Quantum Spacetime, into a U($\infty$) gauge theory, hence free classical electrodynamics is no longer free and neutral fields may have electromagnetic interactions. We discuss the last point for scalar fields, possibly describing dark matter; we have in mind ... |
0909.0866 | Oliver Piattella | V. Gorini, A. Yu. Kamenshchik, U. Moschella, O. F. Piattella and A. A.
Starobinsky | More about the Tolman-Oppenheimer-Volkoff equations for the generalized
Chaplygin gas | 8 pages, revtex style, minor stylistic changes, typos corrected. It
matches the published version | Phys.Rev.D80:104038,2009 | 10.1103/PhysRevD.80.104038 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the Tolman-Oppenheimer-Volkoff equations for the generalized
Chaplygin gas with the aim of extending the findings of V. Gorini, U.
Moschella, A. Y. Kamenshchik, V. Pasquier, and A. A. Starobinsky [Phys. Rev. D
{\bf 78}, 064064 (2008)]. We study both the standard case, where we reproduce
some previous r... | [
{
"created": "Fri, 4 Sep 2009 12:07:31 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Dec 2009 17:20:51 GMT",
"version": "v2"
},
{
"created": "Thu, 3 Dec 2009 09:11:37 GMT",
"version": "v3"
}
] | 2014-11-20 | [
[
"Gorini",
"V.",
""
],
[
"Kamenshchik",
"A. Yu.",
""
],
[
"Moschella",
"U.",
""
],
[
"Piattella",
"O. F.",
""
],
[
"Starobinsky",
"A. A.",
""
]
] | We investigate the Tolman-Oppenheimer-Volkoff equations for the generalized Chaplygin gas with the aim of extending the findings of V. Gorini, U. Moschella, A. Y. Kamenshchik, V. Pasquier, and A. A. Starobinsky [Phys. Rev. D {\bf 78}, 064064 (2008)]. We study both the standard case, where we reproduce some previous res... |
1511.03155 | Alexander Pavlov E | Alexander E. Pavlov | Mixmaster model is associated to Borcherds algebra | 7 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of integrability of the mixmaster model as a dynamical system
with finite degrees of freedom is investigated. The model belongs to the class
of pseudo-Euclidean generalized Toda chains. It is presented as a
quasi-homogeneous system after transformations of phase variables. An
application of the method of ... | [
{
"created": "Sun, 8 Nov 2015 10:01:34 GMT",
"version": "v1"
},
{
"created": "Sun, 1 May 2016 11:03:25 GMT",
"version": "v2"
}
] | 2016-05-03 | [
[
"Pavlov",
"Alexander E.",
""
]
] | The problem of integrability of the mixmaster model as a dynamical system with finite degrees of freedom is investigated. The model belongs to the class of pseudo-Euclidean generalized Toda chains. It is presented as a quasi-homogeneous system after transformations of phase variables. An application of the method of ge... |
1704.04004 | Avadhut Purohit | Avadhut Purohit | Canonical gravity and scalar fields | 12 pages, no figure, with few corrections | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A combined variable theory of gravity and scalar field is developed under ADM
formulation by redefining new canonical conjugate variables ({\Phi}, {\Pi}). It
is a dynamical theory of the space-matter with implicit time dependence.
Quantizing this new field theory results in quantization of geometry and scalar
field c... | [
{
"created": "Thu, 13 Apr 2017 06:24:54 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Apr 2017 15:35:49 GMT",
"version": "v2"
},
{
"created": "Fri, 2 Feb 2018 11:18:39 GMT",
"version": "v3"
},
{
"created": "Thu, 24 May 2018 16:56:14 GMT",
"version": "v4"
},
{
"cr... | 2018-05-31 | [
[
"Purohit",
"Avadhut",
""
]
] | A combined variable theory of gravity and scalar field is developed under ADM formulation by redefining new canonical conjugate variables ({\Phi}, {\Pi}). It is a dynamical theory of the space-matter with implicit time dependence. Quantizing this new field theory results in quantization of geometry and scalar field com... |
2007.00175 | Mubasher Jamil | M. Umar Farooq, Ayyesha K. Ahmed, Rong-Jia Yang, Mubasher Jamil | Accretion on High Derivative Asymptotically Safe Black Holes | 15 pages, 2 captioned figures | Chinese Physics C Vol. 44, No. 6 (2020) 065102 | 10.1088/1674-1137/44/6/065102 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Asymptotically safe gravity is one effective approach to quantum gravity. It
is important to differentiate the modified gravity inspired by asymptotically
safe gravity. In this paper, we examine the matter particles dynamics near the
improved version of Schwarzschild black hole. We assume that in the context of
asymp... | [
{
"created": "Wed, 1 Jul 2020 01:39:12 GMT",
"version": "v1"
}
] | 2020-07-02 | [
[
"Farooq",
"M. Umar",
""
],
[
"Ahmed",
"Ayyesha K.",
""
],
[
"Yang",
"Rong-Jia",
""
],
[
"Jamil",
"Mubasher",
""
]
] | Asymptotically safe gravity is one effective approach to quantum gravity. It is important to differentiate the modified gravity inspired by asymptotically safe gravity. In this paper, we examine the matter particles dynamics near the improved version of Schwarzschild black hole. We assume that in the context of asympto... |
1801.00161 | Dor Gabay | Dor Gabay and Sijo K. Joseph | On the Mediating Field in a Conformally Transformed Einstein Equation | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A unique constraint is defined within the framework of scalar-tensor
theories, whereby the conformal factor is fixed to the fluctuation associated
to the effective mass of the Hamilton-Jacobi equation for a Klein-Gordon field.
The effective mass is extended to its exponential form to remove any ghost
(energy) states.... | [
{
"created": "Sat, 30 Dec 2017 17:34:35 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Feb 2018 14:49:38 GMT",
"version": "v2"
},
{
"created": "Wed, 16 May 2018 22:58:29 GMT",
"version": "v3"
},
{
"created": "Fri, 27 Mar 2020 08:08:56 GMT",
"version": "v4"
}
] | 2020-03-30 | [
[
"Gabay",
"Dor",
""
],
[
"Joseph",
"Sijo K.",
""
]
] | A unique constraint is defined within the framework of scalar-tensor theories, whereby the conformal factor is fixed to the fluctuation associated to the effective mass of the Hamilton-Jacobi equation for a Klein-Gordon field. The effective mass is extended to its exponential form to remove any ghost (energy) states. T... |
2406.15971 | Reinabelle Reyes | Marco Immanuel B. Rivera and Reinabelle C. Reyes | Measurable Parameter Combinations of Environmentally-dephased EMRI
Gravitational-Wave Signals | Matches accepted version in New Astronomy; 8 pages, 2 figures | New Astronomy, 112, 102263 (2024) | 10.1016/j.newast.2024.102263 | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | The future space-borne Laser Interferometer Space Antenna (LISA) is expected
to detect gravitational waves (GW) from Extreme Mass Ratio Inspiral (EMRI)
binaries which may live in nontrivial environments such as accretion disks. In
this work, we apply the Fisher matrix Principal Component Analysis (PCA) method
to asse... | [
{
"created": "Sun, 23 Jun 2024 00:28:37 GMT",
"version": "v1"
}
] | 2024-06-25 | [
[
"Rivera",
"Marco Immanuel B.",
""
],
[
"Reyes",
"Reinabelle C.",
""
]
] | The future space-borne Laser Interferometer Space Antenna (LISA) is expected to detect gravitational waves (GW) from Extreme Mass Ratio Inspiral (EMRI) binaries which may live in nontrivial environments such as accretion disks. In this work, we apply the Fisher matrix Principal Component Analysis (PCA) method to assess... |
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