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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0911.1968 | I-Ching Yang | I-Ching Yang, Chi-Long Lin and I. Radinschi | Energy Distribution of a Regular Class of Exact Black Hole Solutions | 9 pages | Int.J.Theor.Phys.48:2454-2461,2009 | 10.1007/s10773-009-0039-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we present the expressions for the energy of a regular class of
exact black hole solutions of Einstein's equations coupled with a nonlinear
electrodynamics source. We calculate the energy distribution using the
Einstein, Weinberg and M{\o}ller prescriptions. We make a discussion of the
results in functi... | [
{
"created": "Tue, 10 Nov 2009 18:52:19 GMT",
"version": "v1"
}
] | 2011-01-27 | [
[
"Yang",
"I-Ching",
""
],
[
"Lin",
"Chi-Long",
""
],
[
"Radinschi",
"I.",
""
]
] | In this paper we present the expressions for the energy of a regular class of exact black hole solutions of Einstein's equations coupled with a nonlinear electrodynamics source. We calculate the energy distribution using the Einstein, Weinberg and M{\o}ller prescriptions. We make a discussion of the results in function... |
1806.01588 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | A Study of Finite-time Singularities of Loop Quantum Cosmology
Interacting Multifluids | PRD Accepted | null | 10.1103/PhysRevD.97.124042 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we study the occurrence of finite-time cosmological
singularities in a cosmological system comprising from three fluids.
Particularly, the system contains two dark fluids, namely that of dark energy
and dark matter, which are interacting, and of a non-interacting baryonic
fluid. For the study we adopt th... | [
{
"created": "Tue, 5 Jun 2018 10:02:31 GMT",
"version": "v1"
}
] | 2018-08-01 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | In this work we study the occurrence of finite-time cosmological singularities in a cosmological system comprising from three fluids. Particularly, the system contains two dark fluids, namely that of dark energy and dark matter, which are interacting, and of a non-interacting baryonic fluid. For the study we adopt the ... |
0901.3344 | Ramin Nowbakht Ghalati | R. N. Ghalati | A Novel Hamiltonian Formulation of First Order Einstein-Hilbert Action:
Connection with ADM, Diffeomorphism Invariance and Linearized Theory | 35 pages | null | null | UWO-TH-09/1 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A novel Dirac Hamiltonian formulation of the first order Einstein-Hilbert
(EH) action, in which algebraic constraints are not solved to eliminate fields
from the action at the Lagrangian level, has been shown to lead to an action
and a constraint structure apparently distinct from the ADM action and the ADM
constrain... | [
{
"created": "Wed, 21 Jan 2009 20:09:34 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Apr 2009 02:19:19 GMT",
"version": "v2"
}
] | 2009-04-07 | [
[
"Ghalati",
"R. N.",
""
]
] | A novel Dirac Hamiltonian formulation of the first order Einstein-Hilbert (EH) action, in which algebraic constraints are not solved to eliminate fields from the action at the Lagrangian level, has been shown to lead to an action and a constraint structure apparently distinct from the ADM action and the ADM constraint ... |
1412.6344 | Inyong Cho | Inyong Cho and Naveen K. Singh | Scalar Perturbation Produced at the Pre-inflationary Stage in
Eddington-inspired Born-Infeld Gravity | 12 pages, 1 figure, version to appear in EPJC | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the scalar perturbation produced at the pre-inflationary stage
driven by a massive scalar field in Eddington-inspired Born-Infeld gravity. The
scalar power spectrum exhibits a peculiar rise for low $k$-modes. The
tensor-to-scalar ratio can be significantly lowered compared with that in the
standard cha... | [
{
"created": "Fri, 19 Dec 2014 13:49:38 GMT",
"version": "v1"
},
{
"created": "Fri, 29 May 2015 10:26:25 GMT",
"version": "v2"
}
] | 2015-06-01 | [
[
"Cho",
"Inyong",
""
],
[
"Singh",
"Naveen K.",
""
]
] | We investigate the scalar perturbation produced at the pre-inflationary stage driven by a massive scalar field in Eddington-inspired Born-Infeld gravity. The scalar power spectrum exhibits a peculiar rise for low $k$-modes. The tensor-to-scalar ratio can be significantly lowered compared with that in the standard chaot... |
1911.06059 | Alejandro Perez | Alejandro Perez and Daniel Sudarsky | Black holes, Planckian granularity, and the changing cosmological
`constant' | null | null | null | null | gr-qc astro-ph.CO astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent work we have argued that nosy energy momentum diffusion due to
space-time discreteness at the Planck scale (naturally expected to arise from
quantum gravity) can be responsible for the generation of a cosmological
constant during the electro-weak phase transition era of the cosmic evolution.
Simple dimens... | [
{
"created": "Thu, 14 Nov 2019 12:22:16 GMT",
"version": "v1"
}
] | 2019-11-15 | [
[
"Perez",
"Alejandro",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | In a recent work we have argued that nosy energy momentum diffusion due to space-time discreteness at the Planck scale (naturally expected to arise from quantum gravity) can be responsible for the generation of a cosmological constant during the electro-weak phase transition era of the cosmic evolution. Simple dimensio... |
1906.05632 | Khalid Saifullah | Rehana Rahim and Khalid Saifullah | Particle dynamics and geometric optics in Chern-Simons black holes | Some improvements carried out and title changed. Now it matches the
published version | Annals of Physics 428 (2021) 168435 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the effects of the coupling constant of the
Chern-Simons modified gravity on some physical properties of black holes. The
Hawking mass is one of the proposed definitions of quasilocal mass. We find
that, for slowly rotating Chern-Simons black holes, the Hawking mass is
independent of the coupli... | [
{
"created": "Thu, 13 Jun 2019 12:30:47 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Aug 2021 18:08:16 GMT",
"version": "v2"
}
] | 2021-08-18 | [
[
"Rahim",
"Rehana",
""
],
[
"Saifullah",
"Khalid",
""
]
] | In this paper we study the effects of the coupling constant of the Chern-Simons modified gravity on some physical properties of black holes. The Hawking mass is one of the proposed definitions of quasilocal mass. We find that, for slowly rotating Chern-Simons black holes, the Hawking mass is independent of the coupling... |
gr-qc/9510062 | Hans-Juergen Schmidt | Hans - Juergen Schmidt | Classical mechanics with lapse | 13 pages, latex, no figures, J. Math. Phys. in print | J.Math.Phys. 37 (1996) 1244-1252 | 10.1063/1.531459 | Revised version of Potsdam/Math 93/10 | gr-qc | null | Mechanics is developed over a differentiable manifold as space of possible
positions. Time is considered to fill a one--dimensional Riemannian manifold,
so having the metric as lapse. Then the system is quantized with covariant
instead of partial derivatives in the Schr\"odinger operator. Consequences for
quantum cos... | [
{
"created": "Tue, 31 Oct 1995 08:51:10 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Schmidt",
"Hans - Juergen",
""
]
] | Mechanics is developed over a differentiable manifold as space of possible positions. Time is considered to fill a one--dimensional Riemannian manifold, so having the metric as lapse. Then the system is quantized with covariant instead of partial derivatives in the Schr\"odinger operator. Consequences for quantum cosmo... |
1103.6180 | Jose Luis Jaramillo | Jos\'e Luis Jaramillo, Marcus Ansorg and Nicolas Vasset | Application of initial data sequences to the study of Black Hole
dynamical trapping horizons | Contribution to the proceedings volume of the Spanish Relativity
Meeting 2008: Physics and Mathematics of Gravitation, Salamanca, Spain, 15-19
Sep 2008 | AIP Conf.Proc.1122:308-311,2009 | 10.1063/1.3141305 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Non-continuous "jumps" of Apparent Horizons occur generically in 3+1 (binary)
black hole evolutions. The dynamical trapping horizon framework suggests a
spacetime picture in which these "Apparent Horizon jumps" are understood as
spatial cuts of a single spacetime hypersurface foliated by (compact)
marginally outer tr... | [
{
"created": "Thu, 31 Mar 2011 13:49:41 GMT",
"version": "v1"
}
] | 2011-04-05 | [
[
"Jaramillo",
"José Luis",
""
],
[
"Ansorg",
"Marcus",
""
],
[
"Vasset",
"Nicolas",
""
]
] | Non-continuous "jumps" of Apparent Horizons occur generically in 3+1 (binary) black hole evolutions. The dynamical trapping horizon framework suggests a spacetime picture in which these "Apparent Horizon jumps" are understood as spatial cuts of a single spacetime hypersurface foliated by (compact) marginally outer trap... |
2305.01607 | Miguel Sabido | Javier Chagoya, I. D\'iaz-Salda\~na, J. C. L\'opez-Dom\'inguez, M.
Sabido | Cosmic acceleration in entropic cosmology | 11 pages, 3 figures. Version accepted for Publication in Phys. Lett.
B | null | null | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the viability of an entropic cosmological model. The
effects of entropic gravity are derived from a modified entropy-area
relationship with a volumetric entropy term. This model describes a late time
limit cosmic acceleration, whose origin is related to a volumetric term in the
entropy. Moreove... | [
{
"created": "Tue, 2 May 2023 17:11:24 GMT",
"version": "v1"
},
{
"created": "Wed, 6 Mar 2024 03:18:52 GMT",
"version": "v2"
}
] | 2024-03-07 | [
[
"Chagoya",
"Javier",
""
],
[
"Díaz-Saldaña",
"I.",
""
],
[
"López-Domínguez",
"J. C.",
""
],
[
"Sabido",
"M.",
""
]
] | In this paper we study the viability of an entropic cosmological model. The effects of entropic gravity are derived from a modified entropy-area relationship with a volumetric entropy term. This model describes a late time limit cosmic acceleration, whose origin is related to a volumetric term in the entropy. Moreover,... |
gr-qc/0511001 | Nergis Mavalvala | T. Corbitt, Y. Chen, F. Khalili, D. Ottaway, S. Vyatchanin, S.
Whitcomb, and N. Mavalvala | A squeezed state source using radiation pressure induced rigidity | 15 pages, 6 figures, submitted to Phys. Rev. A | null | 10.1103/PhysRevA.73.023801 | null | gr-qc quant-ph | null | We propose an experiment to extract ponderomotive squeezing from an
interferometer with high circulating power and low mass mirrors. In this
interferometer, optical resonances of the arm cavities are detuned from the
laser frequency, creating a mechanical rigidity that dramatically suppresses
displacement noise. Afte... | [
{
"created": "Tue, 1 Nov 2005 03:36:24 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Corbitt",
"T.",
""
],
[
"Chen",
"Y.",
""
],
[
"Khalili",
"F.",
""
],
[
"Ottaway",
"D.",
""
],
[
"Vyatchanin",
"S.",
""
],
[
"Whitcomb",
"S.",
""
],
[
"Mavalvala",
"N.",
""
]
] | We propose an experiment to extract ponderomotive squeezing from an interferometer with high circulating power and low mass mirrors. In this interferometer, optical resonances of the arm cavities are detuned from the laser frequency, creating a mechanical rigidity that dramatically suppresses displacement noise. After ... |
gr-qc/9910047 | Felix Finster | Felix Finster, Joel Smoller, and Shing-Tung Yau | The Interaction of Dirac Particles with Non-Abelian Gauge Fields and
Gravity - Black Holes | 9 pages, LaTeX (published version) | Michigan Math.J. 47 (2000) 199-208 | 10.1307/mmj/1030374678 | null | gr-qc hep-th math-ph math.AP math.MP | null | We consider a static, spherically symmetric system of a Dirac particle in a
classical gravitational and SU(2) Yang-Mills field. We prove that the only
black-hole solutions of the corresponding Einstein-Dirac-Yang/Mills equations
are the Bartnik-McKinnon black-hole solutions of the SU(2) Einstein-Yang/Mills
equations;... | [
{
"created": "Wed, 13 Oct 1999 19:44:59 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jun 2000 12:19:41 GMT",
"version": "v2"
}
] | 2014-01-28 | [
[
"Finster",
"Felix",
""
],
[
"Smoller",
"Joel",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | We consider a static, spherically symmetric system of a Dirac particle in a classical gravitational and SU(2) Yang-Mills field. We prove that the only black-hole solutions of the corresponding Einstein-Dirac-Yang/Mills equations are the Bartnik-McKinnon black-hole solutions of the SU(2) Einstein-Yang/Mills equations; t... |
1712.10016 | Zeinab Teimoori | Zeinab Teimoori, Kayoomars Karami | Galileon intermediate inflation | 30 pages, 5 figures | ApJ 864, 41(2018) | 10.3847/1538-4357/aad3b3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate intermediate inflation in the framework of a Galileon scalar
field. To this aim, we first obtain the inflationary observables, including the
scalar spectral index, the tensor-to-scalar ratio, the running of the scalar
spectral index, as well as the non-Gaussianity parameters. Then, we examine the
obser... | [
{
"created": "Thu, 28 Dec 2017 11:39:09 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Feb 2018 20:54:04 GMT",
"version": "v2"
},
{
"created": "Fri, 31 Aug 2018 12:44:05 GMT",
"version": "v3"
}
] | 2018-09-03 | [
[
"Teimoori",
"Zeinab",
""
],
[
"Karami",
"Kayoomars",
""
]
] | We investigate intermediate inflation in the framework of a Galileon scalar field. To this aim, we first obtain the inflationary observables, including the scalar spectral index, the tensor-to-scalar ratio, the running of the scalar spectral index, as well as the non-Gaussianity parameters. Then, we examine the observa... |
gr-qc/0006075 | Yuan-Zhong Zhang | Yuan-Zhong Zhang, Jun Luo, and Yu-Xin Nie | Gravitational Effects of Rotating Bodies | LaTex, 6 pages | Mod. Phys. lett. A 16 (2001) 789-794 | 10.1142/S021773230100370X | null | gr-qc | null | We study two type effects of gravitational field on mechanical gyroscopes
(i.e. rotating extended bodies). The first depends on special relativity and
equivalence principle. The second is related to the coupling (i.e. a new force)
between the spins of mechanical gyroscopes, which would violate the equivalent
principl... | [
{
"created": "Wed, 21 Jun 2000 09:29:40 GMT",
"version": "v1"
},
{
"created": "Mon, 28 May 2001 09:02:32 GMT",
"version": "v2"
}
] | 2016-12-21 | [
[
"Zhang",
"Yuan-Zhong",
""
],
[
"Luo",
"Jun",
""
],
[
"Nie",
"Yu-Xin",
""
]
] | We study two type effects of gravitational field on mechanical gyroscopes (i.e. rotating extended bodies). The first depends on special relativity and equivalence principle. The second is related to the coupling (i.e. a new force) between the spins of mechanical gyroscopes, which would violate the equivalent principle.... |
1412.6447 | Daniela Pugliese Dr | O. Zanotti and D. Pugliese | Von Zeipel's theorem for a magnetized circular flow around a compact
object | 14 pages | null | 10.1007/s10714-015-1886-4 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze a class of physical properties, forming the content of the
so-called von Zeipel theorem, which characterizes stationary, axisymmetric,
non-selfgravitating perfect fluids in circular motion in the gravitational
field of a compact object. We consider the extension of the theorem to the
magnetohydrodynamic re... | [
{
"created": "Fri, 19 Dec 2014 17:21:04 GMT",
"version": "v1"
}
] | 2015-06-23 | [
[
"Zanotti",
"O.",
""
],
[
"Pugliese",
"D.",
""
]
] | We analyze a class of physical properties, forming the content of the so-called von Zeipel theorem, which characterizes stationary, axisymmetric, non-selfgravitating perfect fluids in circular motion in the gravitational field of a compact object. We consider the extension of the theorem to the magnetohydrodynamic regi... |
1904.10920 | Vitor Silveira Barroso | Vitor S. Barroso and J. P. M. Pitelli | Boundary Conditions and Vacuum Fluctuations in $\mathrm{AdS}_4$ | 23 pages, 4 figures | null | 10.1007/s10714-020-02672-4 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Initial conditions given on a spacelike, static slice of a non-globally
hyperbolic spacetime may not define the fates of classical and quantum fields
uniquely. Such lack of global hyperbolicity is a well-known property of the
anti-de Sitter solution and led many authors to question how is it possible to
develop a qua... | [
{
"created": "Wed, 24 Apr 2019 16:53:46 GMT",
"version": "v1"
}
] | 2020-04-15 | [
[
"Barroso",
"Vitor S.",
""
],
[
"Pitelli",
"J. P. M.",
""
]
] | Initial conditions given on a spacelike, static slice of a non-globally hyperbolic spacetime may not define the fates of classical and quantum fields uniquely. Such lack of global hyperbolicity is a well-known property of the anti-de Sitter solution and led many authors to question how is it possible to develop a quant... |
1209.4503 | Lijing Shao | Lijing Shao, Norbert Wex | New tests of local Lorentz invariance of gravity with small-eccentricity
binary pulsars | 34 pages, 8 figures, 2 tables; accepted by Classical and Quantum
Gravity | Class. Quantum Grav. 29 (2012) 215018 | 10.1088/0264-9381/29/21/215018 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the post-Newtonian parametrization of semi-conservative gravity theories,
local Lorentz invariance (LLI) violation is characterized by two parameters,
alpha_1 and alpha_2. In binary pulsars the isotropic violation of LLI in the
gravitational sector leads to characteristic preferred frame effects (PFEs) in
the orbi... | [
{
"created": "Thu, 20 Sep 2012 12:09:56 GMT",
"version": "v1"
}
] | 2012-10-18 | [
[
"Shao",
"Lijing",
""
],
[
"Wex",
"Norbert",
""
]
] | In the post-Newtonian parametrization of semi-conservative gravity theories, local Lorentz invariance (LLI) violation is characterized by two parameters, alpha_1 and alpha_2. In binary pulsars the isotropic violation of LLI in the gravitational sector leads to characteristic preferred frame effects (PFEs) in the orbita... |
1608.06553 | Bohdan Novosyadlyj Dr. | R. Neomenko, B. Novosyadlyj | Dynamics of expansion of the Universe in the models with non-minimally
coupled dark energy | 18 pages, 6 figures, published in Kinematics and Physics of Celestial
Bodies (2016) | Kinematics and Physics of Celestial Bodies, 2016, Vol. 32, No. 4,
pp. 157-171 | 10.3103/S088459131604005X | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the dark energy model with barotropic equation of state, which
interacts with dark matter through gravitation and another force, causing the
energy-momentum exchange between them. Both components are described in
approximation of ideal fluids, which are parametrized by density and equation
of state parame... | [
{
"created": "Sat, 20 Aug 2016 18:42:07 GMT",
"version": "v1"
}
] | 2016-09-07 | [
[
"Neomenko",
"R.",
""
],
[
"Novosyadlyj",
"B.",
""
]
] | We consider the dark energy model with barotropic equation of state, which interacts with dark matter through gravitation and another force, causing the energy-momentum exchange between them. Both components are described in approximation of ideal fluids, which are parametrized by density and equation of state paramete... |
gr-qc/0411003 | Richard Woodard | L. H. Ford (Tufts University) and R. P. Woodard (University of
Florida) | Stress Tensor Correlators in the Schwinger-Keldysh Formalism | 14 pages, LaTeX 2epsilon, no figures, revised for publication | Class.Quant.Grav. 22 (2005) 1637-1647 | 10.1088/0264-9381/22/9/011 | UFIFT-QG-04-4 | gr-qc hep-ph hep-th | null | We express stress tensor correlators using the Schwinger-Keldysh formalism.
The absence of off-diagonal counterterms in this formalism ensures that the +-
and -+ correlators are free of primitive divergences. We use dimensional
regularization in position space to explicitly check this at one loop order for
a massless... | [
{
"created": "Fri, 29 Oct 2004 22:27:32 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Mar 2005 10:04:18 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Ford",
"L. H.",
"",
"Tufts University"
],
[
"Woodard",
"R. P.",
"",
"University of\n Florida"
]
] | We express stress tensor correlators using the Schwinger-Keldysh formalism. The absence of off-diagonal counterterms in this formalism ensures that the +- and -+ correlators are free of primitive divergences. We use dimensional regularization in position space to explicitly check this at one loop order for a massless s... |
1610.07951 | Nistor Nicolaevici | Nistor Nicolaevici and Attila Farkas | Comment on "Fermion production in a magnetic field in a de Sitter
universe" | 13 pages; no figures; to appear in PRD | null | 10.1103/PhysRevD.95.048501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We point out that the transition probabilities used in a recent perturbative
calculation of pair creation in an external magnetic field in the expanding de
Sitter space with the $in$ and $out$ fermion states defined by the Bunch-Davies
modes [C. Crucean et al., Phys. Rev. D 73 044019 (20016)] are gauge dependent
quan... | [
{
"created": "Tue, 25 Oct 2016 16:26:53 GMT",
"version": "v1"
}
] | 2017-04-05 | [
[
"Nicolaevici",
"Nistor",
""
],
[
"Farkas",
"Attila",
""
]
] | We point out that the transition probabilities used in a recent perturbative calculation of pair creation in an external magnetic field in the expanding de Sitter space with the $in$ and $out$ fermion states defined by the Bunch-Davies modes [C. Crucean et al., Phys. Rev. D 73 044019 (20016)] are gauge dependent quanti... |
1502.02017 | Peter K.F. Kuhfittig | Peter K.F. Kuhfittig | Wormholes with a barotropic equation of state admitting a one-parameter
group of conformal motions | 8 pages, no figures | Annals of Physics, vol. 355, 115, 2015 | 10.1016/j.aop.2015.02.002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The theoretical construction of a traversable wormhole proposed by Morris and
Thorne maintains complete control over the geometry by assigning both the shape
and redshift functions, thereby leaving open the determination of the
stress-energy tensor. This paper examines the effect of introducing the linear
barotropic ... | [
{
"created": "Fri, 6 Feb 2015 20:34:14 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Aug 2015 15:20:28 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Mar 2016 18:14:18 GMT",
"version": "v3"
},
{
"created": "Fri, 24 Jul 2020 17:06:31 GMT",
"version": "v4"
}
] | 2020-07-27 | [
[
"Kuhfittig",
"Peter K. F.",
""
]
] | The theoretical construction of a traversable wormhole proposed by Morris and Thorne maintains complete control over the geometry by assigning both the shape and redshift functions, thereby leaving open the determination of the stress-energy tensor. This paper examines the effect of introducing the linear barotropic eq... |
1412.5527 | Miguel Campiglia | Miguel Campiglia and Madhavan Varadarajan | A quantum kinematics for asymptotically flat spacetimes | 64 pages | null | 10.1088/0264-9381/32/13/135011 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a quantum kinematics for asymptotically flat spacetimes based on
the Koslowski-Sahlmann (KS) representation. The KS representation is a
generalization of the representation underlying Loop Quantum Gravity (LQG)
which supports, in addition to the usual LQG operators, the action of
`background exponential ... | [
{
"created": "Wed, 17 Dec 2014 19:26:45 GMT",
"version": "v1"
}
] | 2015-06-17 | [
[
"Campiglia",
"Miguel",
""
],
[
"Varadarajan",
"Madhavan",
""
]
] | We construct a quantum kinematics for asymptotically flat spacetimes based on the Koslowski-Sahlmann (KS) representation. The KS representation is a generalization of the representation underlying Loop Quantum Gravity (LQG) which supports, in addition to the usual LQG operators, the action of `background exponential op... |
0710.5071 | Wytler Cordeiro dos Santos | Wytler Cordeiro dos Santos | Exponential Metric Fields | Accepted for publication in Astrophysics and Space Science, 17 pages | Astrophys.Space Sci.331:295-307,2011 | 10.1007/s10509-010-0429-4 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Laser Interferometer Space Antenna (LISA) mission will use advanced
technologies to achieve its science goals: the direct detection of
gravitational waves, the observation of signals from compact (small and dense)
stars as they spiral into black holes, the study of the role of massive black
holes in galaxy evolut... | [
{
"created": "Fri, 26 Oct 2007 18:59:31 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Jun 2010 14:15:45 GMT",
"version": "v2"
}
] | 2011-01-17 | [
[
"Santos",
"Wytler Cordeiro dos",
""
]
] | The Laser Interferometer Space Antenna (LISA) mission will use advanced technologies to achieve its science goals: the direct detection of gravitational waves, the observation of signals from compact (small and dense) stars as they spiral into black holes, the study of the role of massive black holes in galaxy evolutio... |
2204.14231 | Soumya Chakrabarti | Soumya Chakrabarti and Amitabha Lahiri | Scalar-Fermion Interaction as the Driver of Cosmic Acceleration | 15 pages, 15 Figures, In Communication, Comments are Welcome | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that an interacting scalar-fermion distribution can be used to
demonstrate the cosmic acceleration in General Relativity. The interaction is
of Yukawa nature and it drives the fermion density to decay with cosmic time.
The consistency of the model is established through, (a) a generalization of
the Om(z) par... | [
{
"created": "Fri, 29 Apr 2022 17:02:59 GMT",
"version": "v1"
}
] | 2022-05-02 | [
[
"Chakrabarti",
"Soumya",
""
],
[
"Lahiri",
"Amitabha",
""
]
] | We argue that an interacting scalar-fermion distribution can be used to demonstrate the cosmic acceleration in General Relativity. The interaction is of Yukawa nature and it drives the fermion density to decay with cosmic time. The consistency of the model is established through, (a) a generalization of the Om(z) param... |
gr-qc/0601007 | Josinaldo Menezes | J. Menezes, P. P. Avelino, C. Santos | Gravitational Effects of Varying Alpha Strings | 8 pages, 2 figures, to be published in Int. Journ. of Mod. Phys. A | Int.J.Mod.Phys.A21:3295-3306,2006 | 10.1142/S0217751X06031430 | null | gr-qc astro-ph hep-th | null | We study spatial variations of the fine-structure constant in the presence of
static straight cosmic strings in the weak-field approximation in Einstein
gravity. We work in the context of a generic Bekenstein-type model and consider
a gauge kinetic function linear in the scalar field. We determine an analytical
form ... | [
{
"created": "Tue, 3 Jan 2006 15:22:04 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Menezes",
"J.",
""
],
[
"Avelino",
"P. P.",
""
],
[
"Santos",
"C.",
""
]
] | We study spatial variations of the fine-structure constant in the presence of static straight cosmic strings in the weak-field approximation in Einstein gravity. We work in the context of a generic Bekenstein-type model and consider a gauge kinetic function linear in the scalar field. We determine an analytical form fo... |
gr-qc/0204036 | Brien C. Nolan | Brien C. Nolan | Naked singularities in cylindrical collapse of counter-rotating dust
shells | 4 pages, 8 ps figures. To appear in Phys. Rev. D | Phys.Rev. D65 (2002) 104006 | 10.1103/PhysRevD.65.104006 | null | gr-qc | null | Solutions describing the gravitational collapse of asymptotically flat
cylindrical and prolate shells of (null) dust are shown to admit globally naked
singularities.
| [
{
"created": "Tue, 9 Apr 2002 10:57:53 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Nolan",
"Brien C.",
""
]
] | Solutions describing the gravitational collapse of asymptotically flat cylindrical and prolate shells of (null) dust are shown to admit globally naked singularities. |
2101.11124 | Valerio Faraoni | Valerio Faraoni and Farah Atieh | Generalized Fibonacci numbers, cosmological analogies, and an invariant | 5 pages, no figures. Invited paper to appear in Symmetry and Geometry
in Physics, special issue of Symmetry edited by A. Ungar | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Continuous generalizations of the Fibonacci sequence satisfy ODEs that are
formal analogues of the Friedmann equation describing spatially homogeneous and
isotropic cosmology in general relativity. These analogies are presented,
together with their Lagrangian and Hamiltonian formulations and with an
invariant of the ... | [
{
"created": "Tue, 26 Jan 2021 22:47:29 GMT",
"version": "v1"
}
] | 2021-01-28 | [
[
"Faraoni",
"Valerio",
""
],
[
"Atieh",
"Farah",
""
]
] | Continuous generalizations of the Fibonacci sequence satisfy ODEs that are formal analogues of the Friedmann equation describing spatially homogeneous and isotropic cosmology in general relativity. These analogies are presented, together with their Lagrangian and Hamiltonian formulations and with an invariant of the Fi... |
1409.5377 | Andrzej Krasi\'nski | Andrzej Krasi\'nski | Blueshifts in the Lema\^{\i}tre -- Tolman models | 13 pages, 12 figures; axis labels added in all figures, new paragraph
added after (2.16), Ref. 22 updated; no substantial changes | Phys. Rev. D 90, 103525 (2014) | 10.1103/PhysRevD.90.103525 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the Lema\^{\i}tre -- Tolman (L--T) models that have nonconstant bang-time
function $t_B(r)$, light emitted close to those points of the Big Bang where
$\dril {t_B} r \neq 0$ is blueshifted at the receiver position. The blueshifted
rays are expected to perturb the temperature of the cosmic microwave background
(CMB... | [
{
"created": "Thu, 18 Sep 2014 17:10:21 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Nov 2014 13:44:55 GMT",
"version": "v2"
}
] | 2015-02-03 | [
[
"Krasiński",
"Andrzej",
""
]
] | In the Lema\^{\i}tre -- Tolman (L--T) models that have nonconstant bang-time function $t_B(r)$, light emitted close to those points of the Big Bang where $\dril {t_B} r \neq 0$ is blueshifted at the receiver position. The blueshifted rays are expected to perturb the temperature of the cosmic microwave background (CMB) ... |
0811.1430 | Albert V. Minkevich | A. V. Minkevich, A. S. Garkun, V. I. Kudin | Comment on "Torsion Cosmology and Accelerating Universe" | The abstract is changed, some additions and corrections is made | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmological solutions for homogeneous isotropic models in the framework of
the Poincar\'e gauge theory of gravity based on gravitational Lagrangian
adopted in the paper by Kun-Feng Shie, James M. Nester and Hwei-Jang Yo (Phys.
Rev. D \textbf{78}, 023522 (2008)) are discussed. Cosmological solutions for
accelerating ... | [
{
"created": "Mon, 10 Nov 2008 09:53:33 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Dec 2008 08:05:49 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Aug 2009 16:15:29 GMT",
"version": "v3"
}
] | 2009-08-28 | [
[
"Minkevich",
"A. V.",
""
],
[
"Garkun",
"A. S.",
""
],
[
"Kudin",
"V. I.",
""
]
] | Cosmological solutions for homogeneous isotropic models in the framework of the Poincar\'e gauge theory of gravity based on gravitational Lagrangian adopted in the paper by Kun-Feng Shie, James M. Nester and Hwei-Jang Yo (Phys. Rev. D \textbf{78}, 023522 (2008)) are discussed. Cosmological solutions for accelerating Un... |
1105.0047 | Gergely Sz\'ekely | Hajnal Andr\'eka, Istv\'an N\'emeti and Gergely Sz\'ekely | Closed Timelike Curves in Relativistic Computation | 17 pages, 5 figures | Parallel Processing Letters, 22, 1240010 (2012) | 10.1142/S0129626412400105 | null | gr-qc math-ph math.LO math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the possibility of using closed timelike curves
(CTCs) in relativistic hypercomputation. We introduce a wormhole based
hypercomputation scenario which is free from the common worries, such as the
blueshift problem. We also discuss the physical reasonability of our scenario,
and why we ca... | [
{
"created": "Sat, 30 Apr 2011 05:06:36 GMT",
"version": "v1"
}
] | 2012-11-27 | [
[
"Andréka",
"Hajnal",
""
],
[
"Németi",
"István",
""
],
[
"Székely",
"Gergely",
""
]
] | In this paper, we investigate the possibility of using closed timelike curves (CTCs) in relativistic hypercomputation. We introduce a wormhole based hypercomputation scenario which is free from the common worries, such as the blueshift problem. We also discuss the physical reasonability of our scenario, and why we cann... |
gr-qc/0312079 | Jiliang Jing | Jiliang Jing | Dirac quasinormal modes of the Reissner-Nordstr\"om de Sitter black hole | 10 pages, 6 figures, Phys. Rev. D in press | Phys.Rev. D69 (2004) 084009 | 10.1103/PhysRevD.69.084009 | null | gr-qc astro-ph hep-th | null | The quasinormal modes of the Reissner-Nordstr\"om de Sitter black hole for
the massless Dirac fields are studied using the P\"oshl-Teller potential
approximation. We find that the magnitude of the imaginary part of the
quasinormal frequencies decreases as the cosmological constant or the orbital
angular momentum incr... | [
{
"created": "Wed, 17 Dec 2003 15:22:26 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Jing",
"Jiliang",
""
]
] | The quasinormal modes of the Reissner-Nordstr\"om de Sitter black hole for the massless Dirac fields are studied using the P\"oshl-Teller potential approximation. We find that the magnitude of the imaginary part of the quasinormal frequencies decreases as the cosmological constant or the orbital angular momentum increa... |
1112.4903 | Emanuele Berti | Justin Alsing, Emanuele Berti, Clifford M. Will, Helmut Zaglauer | Gravitational radiation from compact binary systems in the massive
Brans-Dicke theory of gravity | 19 pages, 2 figures, 2 tables. Added new Appendix and slightly
rephrased section on Shapiro time delay. Matches version in press in PRD | null | 10.1103/PhysRevD.85.064041 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the equations of motion, the periastron shift, and the
gravitational radiation damping for quasicircular compact binaries in a massive
variant of the Brans-Dicke theory of gravity. We also study the Shapiro time
delay and the Nordtvedt effect in this theory. By comparing with recent
observational data, we p... | [
{
"created": "Wed, 21 Dec 2011 01:42:12 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Mar 2012 16:19:49 GMT",
"version": "v2"
}
] | 2013-05-30 | [
[
"Alsing",
"Justin",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Will",
"Clifford M.",
""
],
[
"Zaglauer",
"Helmut",
""
]
] | We derive the equations of motion, the periastron shift, and the gravitational radiation damping for quasicircular compact binaries in a massive variant of the Brans-Dicke theory of gravity. We also study the Shapiro time delay and the Nordtvedt effect in this theory. By comparing with recent observational data, we put... |
0805.1901 | Francesco Cianfrani dr | F. Cianfrani, G. Montani | Elementary particle interaction from a Kaluza-Klein scheme | 8 pages, Proceedings of the II Stueckelberg workshop | Int.J.Mod.Phys.A23:1182-1189,2008 | 10.1142/S0217751X08040044 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss properties of particles and fields in a multi-dimensional
space-time, where the geometrization of gauge interactions can be performed. As
far as spinors are concerned, we outline how the gauge coupling can be
recognized by a proper dependence on extra-coordinates and by the dimensional
reduction procedure.... | [
{
"created": "Tue, 13 May 2008 18:45:21 GMT",
"version": "v1"
}
] | 2014-11-18 | [
[
"Cianfrani",
"F.",
""
],
[
"Montani",
"G.",
""
]
] | We discuss properties of particles and fields in a multi-dimensional space-time, where the geometrization of gauge interactions can be performed. As far as spinors are concerned, we outline how the gauge coupling can be recognized by a proper dependence on extra-coordinates and by the dimensional reduction procedure. F... |
2001.01460 | Ezgi Yal\c{c}{\i}nkaya | Ezgi Canay, Maxim Eingorn, Alexander Zhuk | Effects of nonlinearity of $f(R)$ gravity and perfect fluid in
Kaluza-Klein models with spherical compactification | v2 (matching the publication in European Physical Journal C) = v1 +
minor changes + new Refs.; 14 pages, no figures | Eur. Phys. J. C 80, 379 (2020) | 10.1140/epjc/s10052-020-7979-6 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effects associated with nonlinearity of $f(R)$ gravity and of
the background perfect fluid manifested in the Kaluza-Klein model with
spherical compactification. The background space-time is perturbed by a massive
gravitating source which is pressureless in the external space but has an
arbitrary equation... | [
{
"created": "Mon, 6 Jan 2020 10:01:40 GMT",
"version": "v1"
},
{
"created": "Tue, 12 May 2020 14:07:23 GMT",
"version": "v2"
}
] | 2020-05-13 | [
[
"Canay",
"Ezgi",
""
],
[
"Eingorn",
"Maxim",
""
],
[
"Zhuk",
"Alexander",
""
]
] | We study the effects associated with nonlinearity of $f(R)$ gravity and of the background perfect fluid manifested in the Kaluza-Klein model with spherical compactification. The background space-time is perturbed by a massive gravitating source which is pressureless in the external space but has an arbitrary equation o... |
1811.03005 | Olga Sergijenko | O. Sergijenko | 2-field model of dark energy with canonical and non-canonical kinetic
terms | 3 pages, introduction corrected, references added, results and
conclusions unchanged | null | 10.18524/1810-4215.2018.31.144667 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize quintom to include the tachyonic kinetic term along with the
classical one. For such a model we obtain the expressions for energy density
and pressure. For the spatially flat, homogeneous and isotropic Universe with
Friedmann-Robertson-Walker metric of 4-space we derive the equations of motion
for the f... | [
{
"created": "Tue, 6 Nov 2018 17:00:07 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Nov 2018 18:15:15 GMT",
"version": "v2"
}
] | 2019-01-09 | [
[
"Sergijenko",
"O.",
""
]
] | We generalize quintom to include the tachyonic kinetic term along with the classical one. For such a model we obtain the expressions for energy density and pressure. For the spatially flat, homogeneous and isotropic Universe with Friedmann-Robertson-Walker metric of 4-space we derive the equations of motion for the fie... |
2302.00016 | Carlos A. R. Herdeiro | Carlos A. R. Herdeiro, Eugen Radu | Two Schwarzschild-like black holes balanced by their scalar hair | 22 pages, 8 figures | null | 10.1103/PhysRevD.107.064044 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We show that, unlike vacuum General Relativity, Einstein-scalar theories
allow balanced static, neutral, asymptotically flat, double-black hole
solutions, for scalar field models minimally coupled to gravity, with
appropriate self-interactions. These are scalar hairy versions of the
double-Schwarzschild (or Bach-Weyl... | [
{
"created": "Tue, 31 Jan 2023 19:00:01 GMT",
"version": "v1"
}
] | 2023-03-29 | [
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Radu",
"Eugen",
""
]
] | We show that, unlike vacuum General Relativity, Einstein-scalar theories allow balanced static, neutral, asymptotically flat, double-black hole solutions, for scalar field models minimally coupled to gravity, with appropriate self-interactions. These are scalar hairy versions of the double-Schwarzschild (or Bach-Weyl) ... |
gr-qc/0404098 | Won Tae Kim | Won Tae Kim and Edwin J. Son | Wormhole phase in the RST model | v1. REVTeX3, 12 pages and 1 figure; v2. JHEP3, 10 pages and 1 figure,
version published in JHEP | JHEP 0408:006,2004 | 10.1088/1126-6708/2004/08/006 | SOGANG-HEP 312/04 | gr-qc | null | We show that the RST model describing the exactly soluble black hole model
can have a dynamical wormhole solution along with an appropriate boundary
condition. The necessary exotic matter which is usually negative energy density
is remarkably produced by the quantization of the infalling matter fields. Then
the asymp... | [
{
"created": "Thu, 22 Apr 2004 08:58:12 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Sep 2004 00:50:21 GMT",
"version": "v2"
}
] | 2010-02-03 | [
[
"Kim",
"Won Tae",
""
],
[
"Son",
"Edwin J.",
""
]
] | We show that the RST model describing the exactly soluble black hole model can have a dynamical wormhole solution along with an appropriate boundary condition. The necessary exotic matter which is usually negative energy density is remarkably produced by the quantization of the infalling matter fields. Then the asympto... |
1312.6871 | David Garfinkle | Lydia Bieri and David Garfinkle | A perturbative and gauge invariant treatment of gravitational wave
memory | Typos corrected. Discussion extended | Phys. Rev. D 89, 084039 (2014) | 10.1103/PhysRevD.89.084039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a perturbative treatment of gravitational wave memory. The
coordinate invariance of Einstein's equations leads to a type of gauge
invariance in perturbation theory. As with any gauge invariant theory, results
are more clear when expressed in terms of manifestly gauge invariant
quantities. Therefore we deri... | [
{
"created": "Tue, 24 Dec 2013 18:49:48 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Apr 2014 15:01:25 GMT",
"version": "v2"
}
] | 2014-04-23 | [
[
"Bieri",
"Lydia",
""
],
[
"Garfinkle",
"David",
""
]
] | We present a perturbative treatment of gravitational wave memory. The coordinate invariance of Einstein's equations leads to a type of gauge invariance in perturbation theory. As with any gauge invariant theory, results are more clear when expressed in terms of manifestly gauge invariant quantities. Therefore we derive... |
gr-qc/0412044 | Lorenzo Iorio | Lorenzo Iorio | The challenge to reliably measure the general relativistic
Lense-Thirring effect with a few percent accuracy | LaTeX2e, no figures, no tables, 12 pages, 35 references | Proceedings of the Joint CHAMP/GRACE Science Meeting,
GeoForschungsZentrum, Potsdam, July 6-8, 2004.
http://www-app2.gfz-potsdam.de/pb1/JCG/ | null | null | gr-qc astro-ph physics.geo-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we critically analyze the so far performed and proposed tests
for measuring the general relativistic Lense-Thirring effect in the
gravitational field of the Earth with some of the existing accurately tracked
artificial satellites. The impact of the 2nd generation GRACE-only
EIGEN-GRACE02S Earth gravity ... | [
{
"created": "Thu, 9 Dec 2004 23:52:25 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Dec 2004 20:18:33 GMT",
"version": "v2"
},
{
"created": "Tue, 21 Dec 2004 00:06:19 GMT",
"version": "v3"
},
{
"created": "Thu, 30 Dec 2004 18:57:10 GMT",
"version": "v4"
},
{
"cr... | 2012-07-31 | [
[
"Iorio",
"Lorenzo",
""
]
] | In this paper we critically analyze the so far performed and proposed tests for measuring the general relativistic Lense-Thirring effect in the gravitational field of the Earth with some of the existing accurately tracked artificial satellites. The impact of the 2nd generation GRACE-only EIGEN-GRACE02S Earth gravity mo... |
gr-qc/0610127 | Jose M. M. Senovilla | Jos\'e M. M. Senovilla | A singularity theorem based on spatial averages | Corrections made in the main theorem and related places. 16 pages, no
figures. Invited contribution to the Pramana special issue, dedicated to A K
Raychaudhuri, on "the Raychaudhuri Equation and its Role in Modern Cosmology"
(Edited by Naresh Dadhich, Pankaj Joshi and Probir Roy). Final version to be
published | Pramana69:31-48,2007 | 10.1007/s12043-007-0109-2 | null | gr-qc | null | Inspired by Raychaudhuri's work, and using the equation named after him as a
basic ingredient, a new singularity theorem is proved. Open non-rotating
everywhere expanding universes with non-vanishing spatial average of the matter
variables are severely geodesically incomplete to the past. Another way of
stating the r... | [
{
"created": "Thu, 26 Oct 2006 16:28:05 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Mar 2007 11:05:58 GMT",
"version": "v2"
},
{
"created": "Sun, 6 May 2007 11:53:50 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Senovilla",
"José M. M.",
""
]
] | Inspired by Raychaudhuri's work, and using the equation named after him as a basic ingredient, a new singularity theorem is proved. Open non-rotating everywhere expanding universes with non-vanishing spatial average of the matter variables are severely geodesically incomplete to the past. Another way of stating the res... |
1601.05795 | Sourav Dutta | Sourav Dutta and Subenoy Chakraborty | A study of phantom scalar field cosmology using Lie and Noether
symmetries | 14 pages, 9 figures, accepted for publication in Int. J. Mod. Phys. D
(2016) | null | 10.1142/S0218271816500516 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper deals with phantom scalar field cosmology in Einstein gravity. At
first using Lie symmetry, the coupling function to the kinetic term and the
potential function of the scalar field and the equation of state parameter of
the matter field are determined and a simple solution is obtained.
Subsequently, Noether... | [
{
"created": "Thu, 21 Jan 2016 10:41:05 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Mar 2016 07:21:44 GMT",
"version": "v2"
}
] | 2016-04-27 | [
[
"Dutta",
"Sourav",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | The paper deals with phantom scalar field cosmology in Einstein gravity. At first using Lie symmetry, the coupling function to the kinetic term and the potential function of the scalar field and the equation of state parameter of the matter field are determined and a simple solution is obtained. Subsequently, Noether s... |
gr-qc/0410007 | Graham Woan | The LIGO Scientific Collaboration: B. Abbott, et al, and M. Kramer and
A.G. Lyne | Limits on gravitational wave emission from selected pulsars using LIGO
data | 6 pages, 2 figures | Phys.Rev.Lett.94:181103,2005 | 10.1103/PhysRevLett.94.181103 | LIGO-P040008-A-Z | gr-qc astro-ph | null | We place direct upper limits on the amplitude of gravitational waves from 28
isolated radio pulsars by a coherent multi-detector analysis of the data
collected during the second science run of the LIGO interferometric detectors.
These are the first direct upper limits for 26 of the 28 pulsars. We use
coordinated radi... | [
{
"created": "Fri, 1 Oct 2004 20:01:22 GMT",
"version": "v1"
},
{
"created": "Wed, 19 Jan 2005 15:51:09 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"Abbott",
"B.",
""
],
[
"Kramer",
"M.",
""
],
[
"Lyne",
"A. G.",
""
]
] | We place direct upper limits on the amplitude of gravitational waves from 28 isolated radio pulsars by a coherent multi-detector analysis of the data collected during the second science run of the LIGO interferometric detectors. These are the first direct upper limits for 26 of the 28 pulsars. We use coordinated radio ... |
gr-qc/0009021 | Carlo Rovelli | Alejandro Perez and Carlo Rovelli | Spin foam model for Lorentzian General Relativity | 8 pages, 1 figure | Phys.Rev.D63:041501,2001 | 10.1103/PhysRevD.63.041501 | null | gr-qc | null | We present a spin foam formulation of Lorentzian quantum General Relativity.
The theory is based on a simple generalization of an Euclidean model defined in
terms of a field theory over a group. Its vertex amplitude turns out to be the
one recently introduced by Barrett and Crane. As in the case of its Euclidean
rela... | [
{
"created": "Thu, 7 Sep 2000 12:14:38 GMT",
"version": "v1"
}
] | 2009-12-31 | [
[
"Perez",
"Alejandro",
""
],
[
"Rovelli",
"Carlo",
""
]
] | We present a spin foam formulation of Lorentzian quantum General Relativity. The theory is based on a simple generalization of an Euclidean model defined in terms of a field theory over a group. Its vertex amplitude turns out to be the one recently introduced by Barrett and Crane. As in the case of its Euclidean relati... |
2202.09251 | Di Wu | Di Wu, Shuang-Qing Wu | Consistent mass formulas for the four-dimensional dyonic NUT-charged
spacetimes | 12 pages, no figure, revtex 4-1.cls, to appear in PRD. Companion to
1909.07776 | Phys. Rev. D 105, 124013 (2022) | 10.1103/PhysRevD.105.124013 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In our previous work, a novel idea that the NUT charge can be thought of as a
thermodynamical multi-hair has been advocated to describe perfectly the
thermodynamical character of the generic four-dimensional Taub-NUT spacetimes.
According to this scheme, the Komar mass M, the gravito-magnetic charge and/or
the dual (... | [
{
"created": "Fri, 18 Feb 2022 15:27:52 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Apr 2022 03:34:02 GMT",
"version": "v2"
},
{
"created": "Thu, 26 May 2022 02:39:49 GMT",
"version": "v3"
}
] | 2022-06-08 | [
[
"Wu",
"Di",
""
],
[
"Wu",
"Shuang-Qing",
""
]
] | In our previous work, a novel idea that the NUT charge can be thought of as a thermodynamical multi-hair has been advocated to describe perfectly the thermodynamical character of the generic four-dimensional Taub-NUT spacetimes. According to this scheme, the Komar mass M, the gravito-magnetic charge and/or the dual (ma... |
2211.12056 | Yu-Xiao Liu | Yu-Qi Dong, Yu-Qiang Liu, Yu-Xiao Liu | Constraining Palatini-Horndeski theory with gravitational waves after
GW170817 | 23 pages, no figure | Eur.Phys.J.C 83 (2023) 8, 702 | 10.1140/epjc/s10052-023-11861-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the possible parameter space of
Palatini-Horndeski theory with gravitational waves in a spatially flat
Universe. We find that if the theory satisfies the following condition: in any
spatially flat cosmological background, the tensor gravitational wave speed is
the speed of light $c$, the... | [
{
"created": "Tue, 22 Nov 2022 07:04:43 GMT",
"version": "v1"
}
] | 2024-02-21 | [
[
"Dong",
"Yu-Qi",
""
],
[
"Liu",
"Yu-Qiang",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | In this paper, we investigate the possible parameter space of Palatini-Horndeski theory with gravitational waves in a spatially flat Universe. We find that if the theory satisfies the following condition: in any spatially flat cosmological background, the tensor gravitational wave speed is the speed of light $c$, then ... |
1403.6286 | Oleg Zaslavskii | O. B. Zaslavskii | Ultrahigh energy particle collisions near the black hole horizon in the
strong magnetic field | 6 pages | Mod. Phys. Lett. A, 29, 1450112 (2014) | 10.1142/S0217732314501120 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider collision between two charged (or charged and neutral) particles
near the black hole horizon in the strong magnetic field B. It is shown that
there exists a strip near the horizon within which collision of any two such
particles leads to ultrahigh energy in the centre of mass frame. The results
apply to g... | [
{
"created": "Tue, 25 Mar 2014 10:39:57 GMT",
"version": "v1"
}
] | 2014-07-09 | [
[
"Zaslavskii",
"O. B.",
""
]
] | We consider collision between two charged (or charged and neutral) particles near the black hole horizon in the strong magnetic field B. It is shown that there exists a strip near the horizon within which collision of any two such particles leads to ultrahigh energy in the centre of mass frame. The results apply to gen... |
1211.5310 | Jian-Yang Zhu | Xiao-Jun Yue and Jian-Yang Zhu | Power spectrum and anisotropy of super inflation in loop quantum
cosmology | 12 pages,4 figures,Published version | Phys. Rev. D 87, 063518 (2013) | 10.1103/PhysRevD.87.063518 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the scalar mode of perturbation of super inflation in the
version of loop quantum cosmology in which the gauge invariant holonomy
corrections are considered. Given a background solution, we calculate the power
spectrum of the perturbation in the classical and LQC conditions. Then we
compute the anisotr... | [
{
"created": "Thu, 22 Nov 2012 15:29:51 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Mar 2013 04:24:14 GMT",
"version": "v2"
}
] | 2015-06-12 | [
[
"Yue",
"Xiao-Jun",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | We investigate the scalar mode of perturbation of super inflation in the version of loop quantum cosmology in which the gauge invariant holonomy corrections are considered. Given a background solution, we calculate the power spectrum of the perturbation in the classical and LQC conditions. Then we compute the anisotrop... |
1304.3607 | Nicola Tamanini | Tomi S. Koivisto and Nicola Tamanini | Ghosts in pure and hybrid formalisms of gravity theories: a unified
analysis | 9 pages | null | 10.1103/PhysRevD.87.104030 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the first order formalism of gravitational theories, the spacetime
connection is considered as an independent variable to vary together with the
metric. However, the metric still generates its Levi-Civita connection that
turns out to determine the geodesics of matter. Recently, "hybrid" gravity
theories have been ... | [
{
"created": "Fri, 12 Apr 2013 11:33:46 GMT",
"version": "v1"
}
] | 2013-05-29 | [
[
"Koivisto",
"Tomi S.",
""
],
[
"Tamanini",
"Nicola",
""
]
] | In the first order formalism of gravitational theories, the spacetime connection is considered as an independent variable to vary together with the metric. However, the metric still generates its Levi-Civita connection that turns out to determine the geodesics of matter. Recently, "hybrid" gravity theories have been in... |
2301.08322 | Alexander Dolgov | E. Arbuzova, A. Dolgov, K. Dutta, R. Rangarajan | Gravitational Baryogenesis: Problems and Possible Resolution | 11 pages, no figures, presented at $6^{th}$ International Conference
on Particle Physics and Astrophysics (ICCPA-2022)}. arXiv admin note: text
overlap with arXiv:1808.08577 | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | The coupling of baryonic current to the derivative of the curvature scalar,
$R$, inherent to gravitational baryogenesis (GBG), leads to a fourth order
differential equation of motion for $R$ instead of the algebraic one of General
Relativity (GR). The fourth-order differential equation is generically
unstable. We con... | [
{
"created": "Thu, 19 Jan 2023 21:25:08 GMT",
"version": "v1"
}
] | 2023-01-23 | [
[
"Arbuzova",
"E.",
""
],
[
"Dolgov",
"A.",
""
],
[
"Dutta",
"K.",
""
],
[
"Rangarajan",
"R.",
""
]
] | The coupling of baryonic current to the derivative of the curvature scalar, $R$, inherent to gravitational baryogenesis (GBG), leads to a fourth order differential equation of motion for $R$ instead of the algebraic one of General Relativity (GR). The fourth-order differential equation is generically unstable. We consi... |
2202.12241 | Chun Hing Jackie Liu | Jackie C.H. Liu | A quintessence dynamical dark energy model from ratio gravity | 7 pages, 2 figures, Accepted for publication in EPJC | Eur. Phys. J. C (2022) 82:165 | 10.1140/epjc/s10052-022-10134-1 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Based on the work of ratio gravity developed in 2018, which postulates the
deformation of the cross ratio to associate with the physical model of gravity,
we develop a mechanism to generate dynamical dark energy - a quintessence field
coupled with gravity. Such model causes the dark energy behaving differently in
ear... | [
{
"created": "Tue, 22 Feb 2022 11:45:07 GMT",
"version": "v1"
}
] | 2022-02-25 | [
[
"Liu",
"Jackie C. H.",
""
]
] | Based on the work of ratio gravity developed in 2018, which postulates the deformation of the cross ratio to associate with the physical model of gravity, we develop a mechanism to generate dynamical dark energy - a quintessence field coupled with gravity. Such model causes the dark energy behaving differently in early... |
1603.07744 | Parthapratim Pradhan | Parthapratim Pradhan | Mass Independent Area (or Entropy) and Thermodynamic Volume Products in
Conformal Gravity | Accepted in MPLA | Modern Physics Letters A, Vol. 32 (2017) 1750090 | 10.1142/S0217732317500900 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we investigate the thermodynamic properties of conformal gravity
in four dimensions. We compute the \emph{area(or entropy) functional} relation
for this black hole. We consider both de-Sitter (dS) and anti de-Sitter (AdS)
cases. We derive the \emph{Cosmic-Censorship-Inequality} which is an important
rela... | [
{
"created": "Thu, 24 Mar 2016 20:37:14 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Apr 2017 14:59:03 GMT",
"version": "v2"
}
] | 2017-05-02 | [
[
"Pradhan",
"Parthapratim",
""
]
] | In this work we investigate the thermodynamic properties of conformal gravity in four dimensions. We compute the \emph{area(or entropy) functional} relation for this black hole. We consider both de-Sitter (dS) and anti de-Sitter (AdS) cases. We derive the \emph{Cosmic-Censorship-Inequality} which is an important relati... |
1606.00702 | Sudipto Roy | Sudipto Roy | Time Evolution of the Matter Content of the Expanding Universe in the
Framework of Brans-Dicke Gravity | 23 pages, 16 figures, 1 table and 54 equations in the present
version. Changes made to the older version: 1)Some errors have been
corrected, 2) Three figures have been corrected and their interpretations
have been modified, 3) New references have been added, 4) Some explanations
have been re-written | Research in Astronomy and Astrophysics (RAA), Vol. 19, No. 4,
61(14pp), 2019 | 10.1088/1674-4527/19/4/61 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A cosmological model has been constructed in the framework of Brans-Dicke
(BD) gravity, based on an inter-conversion between matter and dark energy, for
a spatially flat universe in the era of pressureless dust. To account for the
non-conservartion of the matter content, a function of time f(t) has been
arbitrarily p... | [
{
"created": "Thu, 26 May 2016 20:37:23 GMT",
"version": "v1"
},
{
"created": "Sun, 22 Jul 2018 04:51:28 GMT",
"version": "v2"
},
{
"created": "Tue, 28 Apr 2020 08:58:39 GMT",
"version": "v3"
}
] | 2020-05-01 | [
[
"Roy",
"Sudipto",
""
]
] | A cosmological model has been constructed in the framework of Brans-Dicke (BD) gravity, based on an inter-conversion between matter and dark energy, for a spatially flat universe in the era of pressureless dust. To account for the non-conservartion of the matter content, a function of time f(t) has been arbitrarily put... |
1405.3257 | Horace W. Crater | Horace W. Crater, Luca Lusanna | Non-Inertial Frames in Minkowski Space-Time, Accelerated either
Mathematical or Dynamical Observers and Comments on Non-Inertial Relativistic
Quantum Mechanics | null | null | 10.1142/S0219887814500868 | null | gr-qc hep-th physics.class-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After a review of the existing theory of non-inertial frames and mathematical
observers in Minkowski space-time we give the explicit expression of a family
of such frames obtained from the inertial ones by means of point-dependent
Lorentz transformations as suggested by the locality principle. These
non-inertial fram... | [
{
"created": "Fri, 9 May 2014 20:10:03 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Crater",
"Horace W.",
""
],
[
"Lusanna",
"Luca",
""
]
] | After a review of the existing theory of non-inertial frames and mathematical observers in Minkowski space-time we give the explicit expression of a family of such frames obtained from the inertial ones by means of point-dependent Lorentz transformations as suggested by the locality principle. These non-inertial frames... |
1703.03344 | Burkhard Kleihaus | Christian Hoffmann (1 and 2), Theodora Ioannidou (3), Sarah Kahlen
(1), Burkhard Kleihaus (1) and Jutta Kunz (1) ((1) University of Oldenburg,
Germany, (2) University of Massachusetts, Amherst, USA (3) Aristotle
University of Thessaloniki, Greece) | Spontaneous Symmetry Breaking in Wormholes Spacetimes with Matter | 21 pages, 8 figures | Phys. Rev. D 95, 084010 (2017) | 10.1103/PhysRevD.95.084010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When bosonic matter in the form of a complex scalar field is added to Ellis
wormholes, the phenomenon of spontaneous symmetry breaking is observed.
Symmetric solutions possess full reflection symmetry with respect to the radial
coordinate of the two asymptotically flat spacetime regions connected by the
wormhole, whe... | [
{
"created": "Thu, 9 Mar 2017 17:04:19 GMT",
"version": "v1"
}
] | 2017-04-12 | [
[
"Hoffmann",
"Christian",
"",
"1 and 2"
],
[
"Ioannidou",
"Theodora",
""
],
[
"Kahlen",
"Sarah",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
]
] | When bosonic matter in the form of a complex scalar field is added to Ellis wormholes, the phenomenon of spontaneous symmetry breaking is observed. Symmetric solutions possess full reflection symmetry with respect to the radial coordinate of the two asymptotically flat spacetime regions connected by the wormhole, where... |
2106.00605 | Brendan O'Brien | Brendan O'Brien, Marek Szczepanczyk, V. Gayathri, Imre Bartos,
Gabriele Vedovato, Giovanni Prodi, Guenakh Mitselmakher, Sergey Klimenko | Detection of LIGO-Virgo binary black holes in the pair-instability mass
gap | 10 pages, 6 figures, 2 tables | Phys. Rev. D 104, 082003 (2021) | 10.1103/PhysRevD.104.082003 | LIGO-P2100128 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By probing the population of binary black hole (BBH) mergers detected by
LIGO-Virgo, we can infer properties about the underlying black hole formation
channels. A mechanism known as pair-instability (PI) supernova is expected to
prevent the formation of black holes from stellar collapse with mass greater
than $\sim 4... | [
{
"created": "Tue, 1 Jun 2021 16:15:39 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Jun 2021 15:56:29 GMT",
"version": "v2"
}
] | 2021-10-13 | [
[
"O'Brien",
"Brendan",
""
],
[
"Szczepanczyk",
"Marek",
""
],
[
"Gayathri",
"V.",
""
],
[
"Bartos",
"Imre",
""
],
[
"Vedovato",
"Gabriele",
""
],
[
"Prodi",
"Giovanni",
""
],
[
"Mitselmakher",
"Guenakh",
""
... | By probing the population of binary black hole (BBH) mergers detected by LIGO-Virgo, we can infer properties about the underlying black hole formation channels. A mechanism known as pair-instability (PI) supernova is expected to prevent the formation of black holes from stellar collapse with mass greater than $\sim 40-... |
2006.04818 | Carlos O. Lousto | Carlos O. Lousto and James Healy | Exploring the small mass ratio binary black hole merger via Zeno's
dichotomy approach | 6 pages, 4 figures | Phys. Rev. Lett. 125, 191102 (2020) | 10.1103/PhysRevLett.125.191102 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a sequence of binary black hole simulations with increasingly
small mass ratios, reaching to a 128:1 binary that displays 13 orbits before
merger. Based on a detailed convergence study of the $q=m_1/m_2=1/15$
nonspinning case, we apply additional mesh refinements levels around the
smaller hole horizon to r... | [
{
"created": "Mon, 8 Jun 2020 18:00:02 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Sep 2020 16:52:05 GMT",
"version": "v2"
},
{
"created": "Wed, 7 Oct 2020 13:25:04 GMT",
"version": "v3"
}
] | 2020-11-11 | [
[
"Lousto",
"Carlos O.",
""
],
[
"Healy",
"James",
""
]
] | We perform a sequence of binary black hole simulations with increasingly small mass ratios, reaching to a 128:1 binary that displays 13 orbits before merger. Based on a detailed convergence study of the $q=m_1/m_2=1/15$ nonspinning case, we apply additional mesh refinements levels around the smaller hole horizon to rea... |
2306.08547 | Mustafa Saeed | Mustafa Saeed and Viqar Husain | Ising-like models on Euclidean black holes | 13 pages, 8 figures, 1 table | Class. Quantum Grav. 41 015002 (2024) | 10.1088/1361-6382/ad0b9a | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We study spin models on Euclidean black hole backgrounds. These resemble the
Ising model, but are inhomogeneous with two parameters, the black hole mass and
the cosmological constant. We use Monte-Carlo methods to study macroscopic
properties of these systems for Schwarzschild and anti-deSitter black holes in
four an... | [
{
"created": "Wed, 14 Jun 2023 14:46:42 GMT",
"version": "v1"
}
] | 2024-07-12 | [
[
"Saeed",
"Mustafa",
""
],
[
"Husain",
"Viqar",
""
]
] | We study spin models on Euclidean black hole backgrounds. These resemble the Ising model, but are inhomogeneous with two parameters, the black hole mass and the cosmological constant. We use Monte-Carlo methods to study macroscopic properties of these systems for Schwarzschild and anti-deSitter black holes in four and ... |
gr-qc/9405063 | Susan M. Scott | Susan M. Scott and Peter Szekeres | The abstract boundary---a new approach to singularities of manifolds | 40 pages (amslatex) + 5 uuencoded figures (A postscript version is
also available on http://einstein.anu.edu.au/), CMA Maths. Research Report
No. MRR028-94 | J.Geom.Phys.13:223-253,1994 | 10.1016/0393-0440(94)90032-9 | null | gr-qc | null | A new scheme is proposed for dealing with the problem of singularities in
General Relativity. The proposal is, however, much more general than this. It
can be used to deal with manifolds of any dimension which are endowed with
nothing more than an affine connection, and requires a family \calc\ of curves
satisfying a... | [
{
"created": "Thu, 26 May 1994 20:38:55 GMT",
"version": "v1"
}
] | 2010-12-03 | [
[
"Scott",
"Susan M.",
""
],
[
"Szekeres",
"Peter",
""
]
] | A new scheme is proposed for dealing with the problem of singularities in General Relativity. The proposal is, however, much more general than this. It can be used to deal with manifolds of any dimension which are endowed with nothing more than an affine connection, and requires a family \calc\ of curves satisfying a {... |
2011.00945 | Yannick Herfray | Yannick Herfray and Carlos Scarinci | Einstein gravity as a gauge theory for the conformal group | 18 pages, no figures. This is the version accepted for publication in
Classical and Quantum Gravity | Class. Quantum Grav. 39 025011 (2022) | 10.1088/1361-6382/ac3e53 | null | gr-qc hep-th math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General Relativity in dimension $n = p + q$ can be formulated as a gauge
theory for the conformal group $SO(p+1,q+1)$, along with an additional field
reducing the structure group down to the Poincar\'e group $ISO(p,q)$. In this
paper, we propose a new variational principle for Einstein geometry which
realizes this fa... | [
{
"created": "Mon, 2 Nov 2020 12:59:09 GMT",
"version": "v1"
},
{
"created": "Thu, 31 Mar 2022 07:57:32 GMT",
"version": "v2"
}
] | 2022-04-01 | [
[
"Herfray",
"Yannick",
""
],
[
"Scarinci",
"Carlos",
""
]
] | General Relativity in dimension $n = p + q$ can be formulated as a gauge theory for the conformal group $SO(p+1,q+1)$, along with an additional field reducing the structure group down to the Poincar\'e group $ISO(p,q)$. In this paper, we propose a new variational principle for Einstein geometry which realizes this fact... |
1311.4912 | Sergei Kopeikin | Sergei M. Kopeikin (University of Missouri, USA) | Einstein's equivalence principle in cosmology | 52 pages, no figures, references added | null | null | null | gr-qc astro-ph.CO physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study physical consequences of the Einstein equivalence principle (EEP)
for a Hubble observer in FLRW universe. We introduce the local inertial
coordinates with the help of a special conformal transformation. The local
inertial metric is Minkowski-flat and materialized by a congruence of time-like
geodesics of sta... | [
{
"created": "Tue, 19 Nov 2013 22:38:44 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Nov 2013 04:40:21 GMT",
"version": "v2"
},
{
"created": "Tue, 18 Feb 2014 15:44:33 GMT",
"version": "v3"
}
] | 2014-02-19 | [
[
"Kopeikin",
"Sergei M.",
"",
"University of Missouri, USA"
]
] | We study physical consequences of the Einstein equivalence principle (EEP) for a Hubble observer in FLRW universe. We introduce the local inertial coordinates with the help of a special conformal transformation. The local inertial metric is Minkowski-flat and materialized by a congruence of time-like geodesics of stati... |
gr-qc/0201005 | Angelo Tartaglia | A. Tartaglia | Angular momentum effects in weak gravitational fields | LATEX, 8 pages | Europhys.Lett.57:167-173,2002 | 10.1209/epl/i2002-00334-5 | null | gr-qc | null | It is shown that, contrary to what is normally expected, it is possible to
have angular momentum effects on the geometry of space time at the laboratory
scale, much bigger than the purely Newtonian effects. This is due to the fact
that the ratio between the angular momentum of a body and its mass, expressed
as a leng... | [
{
"created": "Wed, 2 Jan 2002 18:10:36 GMT",
"version": "v1"
}
] | 2010-12-17 | [
[
"Tartaglia",
"A.",
""
]
] | It is shown that, contrary to what is normally expected, it is possible to have angular momentum effects on the geometry of space time at the laboratory scale, much bigger than the purely Newtonian effects. This is due to the fact that the ratio between the angular momentum of a body and its mass, expressed as a length... |
1608.07589 | Sylvia Zhu | Sylvia J. Zhu, Maria Alessandra Papa, Heinz-Bernd Eggenstein, Reinhard
Prix, Karl Wette, Bruce Allen, Oliver Bock, David Keitel, Badri Krishnan,
Bernd Machenschalk, Miroslav Shaltev, Xavier Siemens | An Einstein@home search for continuous gravitational waves from
Cassiopeia A | 29 pages, 7 figures, 3 tables | Phys. Rev. D 94, 082008 (2016) | 10.1103/PhysRevD.94.082008 | null | gr-qc astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report the results of a directed search for continuous gravitational-wave
emission in a broad frequency range (between 50 and 1000 Hz) from the central
compact object of the supernova remnant Cassiopeia A (Cas A). The data comes
from the sixth science run of LIGO and the search is performed on the volunteer
distri... | [
{
"created": "Fri, 26 Aug 2016 20:10:15 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Sep 2016 08:50:44 GMT",
"version": "v2"
}
] | 2016-11-02 | [
[
"Zhu",
"Sylvia J.",
""
],
[
"Papa",
"Maria Alessandra",
""
],
[
"Eggenstein",
"Heinz-Bernd",
""
],
[
"Prix",
"Reinhard",
""
],
[
"Wette",
"Karl",
""
],
[
"Allen",
"Bruce",
""
],
[
"Bock",
"Oliver",
""
],
... | We report the results of a directed search for continuous gravitational-wave emission in a broad frequency range (between 50 and 1000 Hz) from the central compact object of the supernova remnant Cassiopeia A (Cas A). The data comes from the sixth science run of LIGO and the search is performed on the volunteer distribu... |
gr-qc/9310008 | null | G. Lifschytz and M. Ortiz | Scalar field quantization on the 2+1 dimensional black hole background | CTP 2243, 24 pages, RevTex. (The backreaction section is extended,
and some confusing notation has been changed) | Phys.Rev.D49:1929-1943,1994 | 10.1103/PhysRevD.49.1929 | null | gr-qc hep-th | null | The quantization of a massless conformally coupled scalar field on the 2+1
dimensional Anti de Sitter black hole background is presented. The Green's
function is calculated, using the fact that the black hole is Anti de Sitter
space with points identified, and taking into account the fact that the black
hole spacetim... | [
{
"created": "Mon, 4 Oct 1993 13:46:34 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Oct 1993 13:58:25 GMT",
"version": "v2"
},
{
"created": "Tue, 9 Nov 1993 19:19:37 GMT",
"version": "v3"
}
] | 2009-09-25 | [
[
"Lifschytz",
"G.",
""
],
[
"Ortiz",
"M.",
""
]
] | The quantization of a massless conformally coupled scalar field on the 2+1 dimensional Anti de Sitter black hole background is presented. The Green's function is calculated, using the fact that the black hole is Anti de Sitter space with points identified, and taking into account the fact that the black hole spacetime ... |
gr-qc/0507104 | Olga Babourova Valer'evna | Olga V. Babourova | Modified Friedmann-Leme\^{\i}tre equation for dilaton-spin dark matter
in Weyl-Cartan space | LaTex, 6 pages, no figures, gc.sty is used | Grav.Cosmol.10:121-126,2004 | null | null | gr-qc astro-ph | null | It is proposed to consider dark matter as a perfect dilaton-spin fluid (with
particles endowed with intrinsic spin and dilaton charge) in the framework of a
gravitational theory with a Weyl-Cartan geometrical structure. The modified
Friedmann-Lema\^{\i}tre equation (with a cosmological term) is obtained for the
homog... | [
{
"created": "Mon, 25 Jul 2005 10:24:30 GMT",
"version": "v1"
}
] | 2011-07-19 | [
[
"Babourova",
"Olga V.",
""
]
] | It is proposed to consider dark matter as a perfect dilaton-spin fluid (with particles endowed with intrinsic spin and dilaton charge) in the framework of a gravitational theory with a Weyl-Cartan geometrical structure. The modified Friedmann-Lema\^{\i}tre equation (with a cosmological term) is obtained for the homogen... |
0707.4552 | Farook Rahaman | F. Rahaman, M. Sarker and M. Kalam | Wormhole and C-field: Revisited | 10 pages and 5 figures, Submitted to Nuovo Cimento B after minor
revisions | Nuovo Cim.B122:389-396,2007 | 10.1393/ncb/i2007-10372-0 | null | gr-qc | null | Recently, Rahaman et al [ Nuovo.Cim 119B, 1115(2004)] have shown that the
static spherically symmetric solutions in presence of C-field give rise to
wormhole geometry. We highlight some of the characteristics of this wormhole,
which have not been considered in the previous study.
| [
{
"created": "Tue, 31 Jul 2007 07:47:40 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Rahaman",
"F.",
""
],
[
"Sarker",
"M.",
""
],
[
"Kalam",
"M.",
""
]
] | Recently, Rahaman et al [ Nuovo.Cim 119B, 1115(2004)] have shown that the static spherically symmetric solutions in presence of C-field give rise to wormhole geometry. We highlight some of the characteristics of this wormhole, which have not been considered in the previous study. |
1704.08373 | Thomas Callister | Thomas Callister, A. Sylvia Biscoveanu, Nelson Christensen,
Maximiliano Isi, Andrew Matas, Olivier Minazzoli, Tania Regimbau, Mairi
Sakellariadou, Jay Tasson, and Eric Thrane | Polarization-based Tests of Gravity with the Stochastic
Gravitational-Wave Background | 24 pages, 20 figures; Accepted by PRX. This version includes major
changes in response to referee comments and corrects an error in Eq. E2 | Phys. Rev. X 7, 041058 (2017) | 10.1103/PhysRevX.7.041058 | LIGO DCC# P1700059; KCL report number KCL-PH-TH/2017-25 | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The direct observation of gravitational waves with Advanced LIGO and Advanced
Virgo offers novel opportunities to test general relativity in strong-field,
highly dynamical regimes. One such opportunity is the measurement of
gravitational-wave polarizations. While general relativity predicts only two
tensor gravitatio... | [
{
"created": "Wed, 26 Apr 2017 22:55:16 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Oct 2017 17:22:09 GMT",
"version": "v2"
}
] | 2017-12-13 | [
[
"Callister",
"Thomas",
""
],
[
"Biscoveanu",
"A. Sylvia",
""
],
[
"Christensen",
"Nelson",
""
],
[
"Isi",
"Maximiliano",
""
],
[
"Matas",
"Andrew",
""
],
[
"Minazzoli",
"Olivier",
""
],
[
"Regimbau",
"Tania",
... | The direct observation of gravitational waves with Advanced LIGO and Advanced Virgo offers novel opportunities to test general relativity in strong-field, highly dynamical regimes. One such opportunity is the measurement of gravitational-wave polarizations. While general relativity predicts only two tensor gravitationa... |
0705.1756 | Christian Boehmer | C. G. Boehmer, T. Harko | On Einstein clusters as galactic dark matter halos | MNRAS LaTeX, 7 pages, accepted by MNRAS; reference added | Mon.Not.Roy.Astron.Soc.379:393-398,2007 | 10.1111/j.1365-2966.2007.11977.x | null | gr-qc astro-ph | null | We consider global and gravitational lensing properties of the recently
suggested Einstein clusters of WIMPs as galactic dark matter halos. Being
tangential pressure dominated, Einstein clusters are strongly anisotropic
systems which can describe any galactic rotation curve by specifying the
anisotropy. Due to this p... | [
{
"created": "Sat, 12 May 2007 09:55:12 GMT",
"version": "v1"
},
{
"created": "Thu, 24 May 2007 22:16:12 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Boehmer",
"C. G.",
""
],
[
"Harko",
"T.",
""
]
] | We consider global and gravitational lensing properties of the recently suggested Einstein clusters of WIMPs as galactic dark matter halos. Being tangential pressure dominated, Einstein clusters are strongly anisotropic systems which can describe any galactic rotation curve by specifying the anisotropy. Due to this pro... |
1110.2006 | Stefanos Aretakis | Stefanos Aretakis | Decay of Axisymmetric Solutions of the Wave Equation on Extreme Kerr
Backgrounds | 47 pages, 17 figures | J. Functional Analysis, 263 (2012), 2770-2831 | null | null | gr-qc math-ph math.AP math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Cauchy problem for the wave equation on extreme Kerr backgrounds
under axisymmetry. Specifically, we consider regular axisymmetric initial data
prescribed on a Cauchy hypersurface S which connects the future event horizon
with spacelike or null infinity, and we solve the linear wave equation on the
domai... | [
{
"created": "Mon, 10 Oct 2011 11:16:10 GMT",
"version": "v1"
}
] | 2012-10-17 | [
[
"Aretakis",
"Stefanos",
""
]
] | We study the Cauchy problem for the wave equation on extreme Kerr backgrounds under axisymmetry. Specifically, we consider regular axisymmetric initial data prescribed on a Cauchy hypersurface S which connects the future event horizon with spacelike or null infinity, and we solve the linear wave equation on the domain ... |
gr-qc/0306103 | Michael B. Mensky | Michael B. Mensky | Universal approach to gravitational thermal effects | 8 pages, LATEX | Phys.Lett. A314 (2003) 169-176 | 10.1016/S0375-9601(03)00801-6 | null | gr-qc hep-th | null | A universal scheme for describing gravitational thermal effects is developed
as a generalization of Unruh effect. Quasi-Rindler (QR) coordinates are
constructed in an arbitrary curved space-time in such a way that the imaginary
QR time be periodical. The observer at rest in QR coordinates should experience
a thermal ... | [
{
"created": "Mon, 23 Jun 2003 05:01:49 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Mensky",
"Michael B.",
""
]
] | A universal scheme for describing gravitational thermal effects is developed as a generalization of Unruh effect. Quasi-Rindler (QR) coordinates are constructed in an arbitrary curved space-time in such a way that the imaginary QR time be periodical. The observer at rest in QR coordinates should experience a thermal ef... |
2306.13593 | Reginald Christian Bernardo | Reginald Christian Bernardo and Kin-Wang Ng | Testing gravity with cosmic variance-limited pulsar timing array
correlations | 5 1/2 pages + refs + supp, 4 figures, v4: to appear in PRD Letters,
our codes
https://github.com/reggiebernardo/PTAfast/tree/main/app3_cvlimitedgravity | Phys. Rev. D 109, L101502 (2024) | 10.1103/PhysRevD.109.L101502 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The nanohertz stochastic gravitational wave background (SGWB) is an excellent
early universe laboratory for testing the fundamental properties of gravity. In
this letter, we elucidate on the full potential of pulsar timing array (PTA) by
utilizing cosmic variance-limited, or rather experimental noise-free,
correlatio... | [
{
"created": "Fri, 23 Jun 2023 16:33:18 GMT",
"version": "v1"
},
{
"created": "Sun, 9 Jul 2023 06:59:36 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Apr 2024 10:14:38 GMT",
"version": "v3"
},
{
"created": "Wed, 22 May 2024 04:21:03 GMT",
"version": "v4"
}
] | 2024-05-24 | [
[
"Bernardo",
"Reginald Christian",
""
],
[
"Ng",
"Kin-Wang",
""
]
] | The nanohertz stochastic gravitational wave background (SGWB) is an excellent early universe laboratory for testing the fundamental properties of gravity. In this letter, we elucidate on the full potential of pulsar timing array (PTA) by utilizing cosmic variance-limited, or rather experimental noise-free, correlation ... |
0904.1741 | Jose' P. S. Lemos | Jos\'e P. S. Lemos, Oleg B. Zaslavskii | Entropy of quasiblack holes | 20 pages, no figures. We thank the editors and referees A, B, and C
of Physical Review Letters and Physical Review D for helping in the
improvement of this paper. | Phys.Rev.D81:064012,2010 | 10.1103/PhysRevD.81.064012 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We trace the origin of the black hole entropy S replacing a black hole by a
quasiblack hole. Let the boundary of a static body approach its own
gravitational radius, in such a way that a quasihorizon forms. We show that if
the body is thermal with the temperature taking the Hawking value at the
quasihorizon limit, it... | [
{
"created": "Fri, 10 Apr 2009 20:04:51 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Mar 2010 20:21:27 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Lemos",
"José P. S.",
""
],
[
"Zaslavskii",
"Oleg B.",
""
]
] | We trace the origin of the black hole entropy S replacing a black hole by a quasiblack hole. Let the boundary of a static body approach its own gravitational radius, in such a way that a quasihorizon forms. We show that if the body is thermal with the temperature taking the Hawking value at the quasihorizon limit, it f... |
0911.1403 | T. Padmanabhan | T. Padmanabhan | A Physical Interpretation of Gravitational Field Equations | Based on the Plenary talk given at the International Conference on
`Invisible Universe', 29 June- 3 July, 2009 Paris; to appear in the
Proceedings; 2 figures; 16 pages | AIP Conf.Proc.1241:93-108,2010 | 10.1063/1.3462738 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is possible to provide a thermodynamic interpretation for the field
equations in any diffeomorphism invariant theory of gravity. This insight, in
turn, leads us to the possibility of deriving the gravitational field equations
from another variational principle without using the metric as a dynamical
variable. I re... | [
{
"created": "Sat, 7 Nov 2009 09:56:50 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Padmanabhan",
"T.",
""
]
] | It is possible to provide a thermodynamic interpretation for the field equations in any diffeomorphism invariant theory of gravity. This insight, in turn, leads us to the possibility of deriving the gravitational field equations from another variational principle without using the metric as a dynamical variable. I revi... |
0905.2476 | Pavel Krtous | Hedvika Kadlecova, Andrei Zelnikov, Pavel Krtous, Jiri Podolsky | Gyratons on direct-product spacetimes | 22 pages, no figures, contains some material not included in the
journal version | Phys.Rev.D80:024004,2009 | 10.1103/PhysRevD.80.024004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present and analyze exact gyraton and nonexpanding gravitational wave
solutions of algebraic type II on backgrounds which are a direct-product of two
2-spaces of constant curvature, or more general type D spacetimes. This family
of electro-vacuum background spacetimes contains the Nariai, anti-Nariai and
Plebanski... | [
{
"created": "Fri, 15 May 2009 06:42:52 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jun 2009 10:03:16 GMT",
"version": "v2"
}
] | 2009-08-11 | [
[
"Kadlecova",
"Hedvika",
""
],
[
"Zelnikov",
"Andrei",
""
],
[
"Krtous",
"Pavel",
""
],
[
"Podolsky",
"Jiri",
""
]
] | We present and analyze exact gyraton and nonexpanding gravitational wave solutions of algebraic type II on backgrounds which are a direct-product of two 2-spaces of constant curvature, or more general type D spacetimes. This family of electro-vacuum background spacetimes contains the Nariai, anti-Nariai and Plebanski-H... |
1910.10423 | Anirban Chatterjee | Abhijit Bandyopadhyay and Anirban Chatterjee | Time-dependent diffusive interactions between dark matter and dark
energy in the context of $k-$essence cosmology | 14 pages, 7 figures; Accepted for publication in Research in
Astronomy and Astrophysics | RAA 2021 Vol.21 No.1, 2 (10pp) | 10.1088/1674-4527/21/1/2 | null | gr-qc astro-ph.CO | http://creativecommons.org/publicdomain/zero/1.0/ | We investigated the scenario of time-dependent diffusive interaction between
dark matter and dark energy and showed that such a model can be accommodated
within the observations of luminosity distance - redshift data in Supernova Ia
(SNe Ia) observations. We obtain constrains on different relevant parameters of
this ... | [
{
"created": "Wed, 23 Oct 2019 09:17:51 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Jun 2020 18:59:04 GMT",
"version": "v2"
}
] | 2021-01-11 | [
[
"Bandyopadhyay",
"Abhijit",
""
],
[
"Chatterjee",
"Anirban",
""
]
] | We investigated the scenario of time-dependent diffusive interaction between dark matter and dark energy and showed that such a model can be accommodated within the observations of luminosity distance - redshift data in Supernova Ia (SNe Ia) observations. We obtain constrains on different relevant parameters of this mo... |
2105.10803 | Grigoris Panotopoulos | Grigoris Panotopoulos and \'Angel Rinc\'on | Growth of structures and redshift-space distortion data in
scale-dependent gravity | 10 pages, 1 table, 4 figures, accepted in EPJ Plus | Eur. Phys. J. Plus 136, 622 (2021) | 10.1140/epjp/s13360-021-01583-w | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This study is devoted to the implications of scale-dependent gravity in
Cosmology. Redshift-space distortion data indicate that there is a tension
between $\Lambda$CDM and available observations as far as the value of the rms
density fluctuation, $\sigma_8$, is concerned. It has been pointed out that
this tension may... | [
{
"created": "Sat, 22 May 2021 20:08:59 GMT",
"version": "v1"
}
] | 2021-06-08 | [
[
"Panotopoulos",
"Grigoris",
""
],
[
"Rincón",
"Ángel",
""
]
] | This study is devoted to the implications of scale-dependent gravity in Cosmology. Redshift-space distortion data indicate that there is a tension between $\Lambda$CDM and available observations as far as the value of the rms density fluctuation, $\sigma_8$, is concerned. It has been pointed out that this tension may b... |
gr-qc/0201091 | Sergio Dain | Sergio Dain and Gabriel Nagy | Initial data for fluid bodies in general relativity | 38 pages, LaTeX 2e, no figures. Accepted for publication in Phys.
Rev. D | Phys.Rev.D65:084020,2002 | 10.1103/PhysRevD.65.084020 | AEI-2001-137 | gr-qc | null | We show that there exist asymptotically flat almost-smooth initial data for
Einstein-perfect fluid's equation that represent an isolated liquid-type body.
By liquid-type body we mean that the fluid energy density has compact support
and takes a strictly positive constant value at its boundary. By almost-smooth
we mea... | [
{
"created": "Tue, 29 Jan 2002 14:45:47 GMT",
"version": "v1"
}
] | 2011-04-21 | [
[
"Dain",
"Sergio",
""
],
[
"Nagy",
"Gabriel",
""
]
] | We show that there exist asymptotically flat almost-smooth initial data for Einstein-perfect fluid's equation that represent an isolated liquid-type body. By liquid-type body we mean that the fluid energy density has compact support and takes a strictly positive constant value at its boundary. By almost-smooth we mean ... |
gr-qc/9606078 | Eric Poisson | Eric Poisson | Gravitational radiation from infall into a black hole: Regularization of
the Teukolsky equation | ReVTeX, 23 pages | Phys.Rev.D55:639-649,1997 | 10.1103/PhysRevD.55.639 | null | gr-qc | null | The Teukolsky equation has long been known to lead to divergent integrals
when it is used to calculate the gravitational radiation emitted when a test
mass falls into a black hole from infinity. Two methods have been used in the
past to remove those divergent integrals. In the first, integrations by parts
are carried... | [
{
"created": "Thu, 27 Jun 1996 18:40:31 GMT",
"version": "v1"
}
] | 2011-09-09 | [
[
"Poisson",
"Eric",
""
]
] | The Teukolsky equation has long been known to lead to divergent integrals when it is used to calculate the gravitational radiation emitted when a test mass falls into a black hole from infinity. Two methods have been used in the past to remove those divergent integrals. In the first, integrations by parts are carried o... |
gr-qc/9501031 | Marcos Duarte Maia | M.D. Maia and E. M. Monte (Universidade de Brasilia) | The Signature Problem for Embedded Space-times | 13 pages, Latex | null | null | UnB.FM.M.-001.95 | gr-qc | null | The compatibility between the general relativity and the mathematical
property that the space-times are embedded manifolds are further examined. In
particular we study the uniqueness of the signature of the embedding space for
a given space-time. The interpretation of the twisting vector as a gauge
potential is also ... | [
{
"created": "Wed, 25 Jan 1995 14:41:52 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Maia",
"M. D.",
"",
"Universidade de Brasilia"
],
[
"Monte",
"E. M.",
"",
"Universidade de Brasilia"
]
] | The compatibility between the general relativity and the mathematical property that the space-times are embedded manifolds are further examined. In particular we study the uniqueness of the signature of the embedding space for a given space-time. The interpretation of the twisting vector as a gauge potential is also im... |
2007.13011 | Mehedi Kalam | Sajahan Molla, Bidisha Ghosh, Mehedi Kalam | Does Dark Matter admixed pulsar exist ? | 10 pages, 17 figures, Accepted in EPJ Plus | Eur.Phys.J.Plus 135, 362 (2020) | 10.1140/epjp/s13360-020-00364-1 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have considered a twofluid model assuming that the pulsars
are made of ordinary matter admixed with dark matter.Contribution of dark
matter comes from the fitting of the rotation curves of the SPARC sample of
galaxies[95]. For this we have investigated the dark matter based on the
Singular Isotherma... | [
{
"created": "Sat, 25 Jul 2020 21:19:41 GMT",
"version": "v1"
}
] | 2020-07-28 | [
[
"Molla",
"Sajahan",
""
],
[
"Ghosh",
"Bidisha",
""
],
[
"Kalam",
"Mehedi",
""
]
] | In this paper, we have considered a twofluid model assuming that the pulsars are made of ordinary matter admixed with dark matter.Contribution of dark matter comes from the fitting of the rotation curves of the SPARC sample of galaxies[95]. For this we have investigated the dark matter based on the Singular Isothermal ... |
1411.3192 | Sharmanthie Fernando | Sharmanthie Fernando, Scott Meadows, and Kevon Reis | Null trajectories and bending of light in charged black holes with
quintessence | 18 figures and 26 pages, some text is removed from the earlier
version but the results remain the same. Accepted to be published in
International Journal of Theoretical Physics | Int. Jour. Theo. Phys. 54, 3634 ( 2015) | 10.1007/s10773-015-2601-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have studied null geodesics of the charged black hole surrounded by
quintessence. Quintessence is a candidate for dark energy and is represented by
a scalar field. Here, we have done a detailed study of the photon trajectories.
The exact solutions for the trajectories are obtained in terms of the
Jacobi-elliptic i... | [
{
"created": "Wed, 12 Nov 2014 14:57:32 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Jun 2015 16:54:43 GMT",
"version": "v2"
}
] | 2015-09-17 | [
[
"Fernando",
"Sharmanthie",
""
],
[
"Meadows",
"Scott",
""
],
[
"Reis",
"Kevon",
""
]
] | We have studied null geodesics of the charged black hole surrounded by quintessence. Quintessence is a candidate for dark energy and is represented by a scalar field. Here, we have done a detailed study of the photon trajectories. The exact solutions for the trajectories are obtained in terms of the Jacobi-elliptic int... |
2206.08234 | Kyungmin Kim | Kyungmin Kim, Joongoo Lee, Otto A. Hannuksela, Tjonnie G. F. Li | Deep Learning-based Search for Microlensing Signature from Binary Black
Hole Events in GWTC-1 and -2 | 14 pages, 7 figures, 4 tables, Accepted by Astrophys. J | ApJ 938 (2022) 2, 157 | 10.3847/1538-4357/ac92f3 | LIGO-P2200006 | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We present the result of the first deep learning-based search for the
signature of microlensing in gravitational waves. This search seeks the
signature induced by lenses with masses between $10^3M_\odot$--$10^5M_\odot$
from spectrograms of the binary black hole events in the first and second
gravitational-wave transi... | [
{
"created": "Thu, 16 Jun 2022 14:59:36 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Sep 2022 07:10:00 GMT",
"version": "v2"
}
] | 2022-10-25 | [
[
"Kim",
"Kyungmin",
""
],
[
"Lee",
"Joongoo",
""
],
[
"Hannuksela",
"Otto A.",
""
],
[
"Li",
"Tjonnie G. F.",
""
]
] | We present the result of the first deep learning-based search for the signature of microlensing in gravitational waves. This search seeks the signature induced by lenses with masses between $10^3M_\odot$--$10^5M_\odot$ from spectrograms of the binary black hole events in the first and second gravitational-wave transien... |
1805.02767 | Pavel Friedrich | Pavel Friedrich, Tomislav Prokopec | Kinetic theory and classical limit for real scalar quantum field in
curved space-time | This version matches the one accepted for publication in Physical
Review D | Phys. Rev. D 98, 025010 (2018) | 10.1103/PhysRevD.98.025010 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from a real scalar quantum field theory with quartic
self-interactions and non-minimal coupling to classical gravity, we define four
equal-time, spatially covariant phase-space operators through a Wigner
transformation of spatially translated canonical operators within a 3+1
decomposition. A subset of these ... | [
{
"created": "Mon, 7 May 2018 22:09:01 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jun 2018 12:53:44 GMT",
"version": "v2"
}
] | 2018-07-17 | [
[
"Friedrich",
"Pavel",
""
],
[
"Prokopec",
"Tomislav",
""
]
] | Starting from a real scalar quantum field theory with quartic self-interactions and non-minimal coupling to classical gravity, we define four equal-time, spatially covariant phase-space operators through a Wigner transformation of spatially translated canonical operators within a 3+1 decomposition. A subset of these op... |
gr-qc/0302103 | Michael Hartl | Michael D. Hartl | A survey of spinning test particle orbits in Kerr spacetime | Submitted to Phys. Rev. D. Follow-up to gr-qc/0210042. Figures are
low-resolution in order to satisfy archive size constraints; a
high-resolution version is available at http://www.michaelhartl.com/papers/ | Phys.Rev. D67 (2003) 104023 | 10.1103/PhysRevD.67.104023 | null | gr-qc | null | We investigate the dynamics of the Papapetrou equations in Kerr spacetime.
These equations provide a model for the motion of a relativistic spinning test
particle orbiting a rotating (Kerr) black hole. We perform a thorough parameter
space search for signs of chaotic dynamics by calculating the Lyapunov
exponents for... | [
{
"created": "Tue, 25 Feb 2003 22:19:16 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Hartl",
"Michael D.",
""
]
] | We investigate the dynamics of the Papapetrou equations in Kerr spacetime. These equations provide a model for the motion of a relativistic spinning test particle orbiting a rotating (Kerr) black hole. We perform a thorough parameter space search for signs of chaotic dynamics by calculating the Lyapunov exponents for a... |
1306.3886 | Lorenzo Iorio | Lorenzo Iorio | Modified theories of gravity with nonminimal coupling and orbital
particle dynamics | LaTex2e, 18 pages, 1 table, 2 figures, 29 references. Accepted for
publication in Classical and Quantum Gravity | Class. Quant. Gravit..31:085003,2014 | 10.1088/0264-9381/31/8/085003 | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a non-rotating, massive test particle acted upon by a
"pressure"-type, non-geodesic acceleration arising from a certain general class
of gravitational theories with nonminimal coupling between the matter and the
metric. The resulting orbital perturbations for a two-body system are
investigated both analyt... | [
{
"created": "Mon, 17 Jun 2013 15:08:04 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Jun 2013 14:58:39 GMT",
"version": "v2"
},
{
"created": "Wed, 11 Sep 2013 06:10:18 GMT",
"version": "v3"
},
{
"created": "Thu, 19 Sep 2013 19:10:34 GMT",
"version": "v4"
},
{
"c... | 2014-03-26 | [
[
"Iorio",
"Lorenzo",
""
]
] | We consider a non-rotating, massive test particle acted upon by a "pressure"-type, non-geodesic acceleration arising from a certain general class of gravitational theories with nonminimal coupling between the matter and the metric. The resulting orbital perturbations for a two-body system are investigated both analytic... |
2102.11888 | Dejan Gajic | Yannis Angelopoulos and Stefanos Aretakis and Dejan Gajic | Price's law and precise late-time asymptotics for subextremal
Reissner-Nordstr\"om black holes | 65 pages, 2 figures | null | 10.1007/s00023-023-01328-8 | null | gr-qc math.AP | http://creativecommons.org/licenses/by/4.0/ | In this paper, we prove precise late-time asymptotics for solutions to the
wave equation supported on angular frequencies greater or equal to $\ell$ on
the domain of outer communications of subextremal Reissner-Nordstr\"om
spacetimes up to and including the event horizon. Our asymptotics yield, in
particular, sharp u... | [
{
"created": "Tue, 23 Feb 2021 19:00:06 GMT",
"version": "v1"
}
] | 2023-08-09 | [
[
"Angelopoulos",
"Yannis",
""
],
[
"Aretakis",
"Stefanos",
""
],
[
"Gajic",
"Dejan",
""
]
] | In this paper, we prove precise late-time asymptotics for solutions to the wave equation supported on angular frequencies greater or equal to $\ell$ on the domain of outer communications of subextremal Reissner-Nordstr\"om spacetimes up to and including the event horizon. Our asymptotics yield, in particular, sharp upp... |
1911.08062 | Yun Soo Myung | De-Cheng Zou, Yun Soo Myung | Scalar hairy black holes in Einstein-Maxwell-conformally coupled scalar
theory | 19 pages, 5 figures, version to appear in PLB | null | 10.1016/j.physletb.2020.135332 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain scalar hairy black holes from Einstein-Maxwell-conformally coupled
scalar (EMCS) theory with the scalar coupling parameter $\alpha$ to the Maxwell
term. In case of $\alpha=0$, the $\alpha=0$ EMCS theory provides constant
(charged) scalar hairy black hole and charged BBMB
(Bocharova-Bronnikov-Melnikov-Bekens... | [
{
"created": "Tue, 19 Nov 2019 02:56:56 GMT",
"version": "v1"
},
{
"created": "Sun, 23 Feb 2020 23:06:03 GMT",
"version": "v2"
}
] | 2020-03-04 | [
[
"Zou",
"De-Cheng",
""
],
[
"Myung",
"Yun Soo",
""
]
] | We obtain scalar hairy black holes from Einstein-Maxwell-conformally coupled scalar (EMCS) theory with the scalar coupling parameter $\alpha$ to the Maxwell term. In case of $\alpha=0$, the $\alpha=0$ EMCS theory provides constant (charged) scalar hairy black hole and charged BBMB (Bocharova-Bronnikov-Melnikov-Bekenste... |
1405.4288 | Sam Cormack | Stephon Alexander, Sam Cormack, Antonino Marcian\`o, Nicol\'as Yunes | Gravitational-Wave Mediated Preheating | 6 pages, 2 figures | Phys. Lett. B 743, 82--86 (2015) | 10.1016/j.physletb.2015.02.018 | NSF-KITP-14-047 | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new preheating mechanism through the coupling of the
gravitational field to both the inflaton and matter fields, without direct
inflaton-matter couplings. The inflaton transfers power to the matter fields
through interactions with gravitational waves, which are exponentially enhanced
due to an inflation-... | [
{
"created": "Fri, 16 May 2014 20:00:01 GMT",
"version": "v1"
},
{
"created": "Thu, 7 May 2015 20:53:19 GMT",
"version": "v2"
}
] | 2015-05-11 | [
[
"Alexander",
"Stephon",
""
],
[
"Cormack",
"Sam",
""
],
[
"Marcianò",
"Antonino",
""
],
[
"Yunes",
"Nicolás",
""
]
] | We propose a new preheating mechanism through the coupling of the gravitational field to both the inflaton and matter fields, without direct inflaton-matter couplings. The inflaton transfers power to the matter fields through interactions with gravitational waves, which are exponentially enhanced due to an inflation-gr... |
2305.02098 | Gerhard Rein | Gerhard Rein | Stability and instability results for equilibria of a (relativistic)
self-gravitating collisionless gas -- A review | 71 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review stability and instability results for self-gravitating matter
distributions, where the matter model is a collisionless gas as described by
the Vlasov equation. The focus is on the general relativistic situation, i.e.,
on steady states of the Einstein-Vlasov system and their stability properties.
In order to... | [
{
"created": "Wed, 3 May 2023 13:04:52 GMT",
"version": "v1"
}
] | 2023-05-04 | [
[
"Rein",
"Gerhard",
""
]
] | We review stability and instability results for self-gravitating matter distributions, where the matter model is a collisionless gas as described by the Vlasov equation. The focus is on the general relativistic situation, i.e., on steady states of the Einstein-Vlasov system and their stability properties. In order to p... |
1904.12675 | Faizuddin Ahmed | Faizuddin Ahmed | Axial symmetry Type N space-time with a naked curvature singularity and
Closed Time-like Curves | Typos corrected, accepted for publication in Gravitation and
Cosmology | Grav. and Cosmo. Vol. 26, Issue 2, 136 (2020) | 10.1134/S0202289320020024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A family of type N exact solution of the Einstein's field equations, regular
everywhere except on the symmetry axis where it possesses a naked curvature
singularity, is present. The stress-energy tensor is of the anisotropic fluid
coupled with pure radiation field satisfy the different energy conditions and
the physi... | [
{
"created": "Fri, 26 Apr 2019 08:23:39 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jun 2019 06:50:51 GMT",
"version": "v2"
},
{
"created": "Fri, 14 Feb 2020 05:30:55 GMT",
"version": "v3"
}
] | 2020-04-14 | [
[
"Ahmed",
"Faizuddin",
""
]
] | A family of type N exact solution of the Einstein's field equations, regular everywhere except on the symmetry axis where it possesses a naked curvature singularity, is present. The stress-energy tensor is of the anisotropic fluid coupled with pure radiation field satisfy the different energy conditions and the physica... |
2210.02130 | Seema Satin | Seema Satin | Correspondences between scalar field and fluid fluctuations in curved
spacetime | null | null | 10.1142/S0218271823500244 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A correspondence between scalar field fluctuations and generalized
fluctuations in a hydrodynamic approximation of fields is obtained. The results
presented here are of interest to field-fluid correspondences and form part of
theoretical foundations in this area. The intention for such developments is to
explore sub-... | [
{
"created": "Wed, 5 Oct 2022 10:31:58 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Dec 2022 04:29:57 GMT",
"version": "v2"
}
] | 2023-05-03 | [
[
"Satin",
"Seema",
""
]
] | A correspondence between scalar field fluctuations and generalized fluctuations in a hydrodynamic approximation of fields is obtained. The results presented here are of interest to field-fluid correspondences and form part of theoretical foundations in this area. The intention for such developments is to explore sub-hy... |
2407.20512 | Zhen-Ming Xu | Chen Ma, Pan-Pan Zhang, Bin Wu, Zhen-Ming Xu | The Kramers escape rate of phase transitions for the 6-dimensional
Gauss-Bonnet AdS black hole with triple phases | 10 pages, 4 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this study, we obtain specific picture of the phase transitions for the
6-dimensional Gauss-Bonnet Anti-de Sitter (AdS) black hole with triple phases,
using the generalized free energy we constructed and Kramers escape rate in
stochastic motion. There are six possible phase transition processes between
the three d... | [
{
"created": "Tue, 30 Jul 2024 03:10:26 GMT",
"version": "v1"
}
] | 2024-07-31 | [
[
"Ma",
"Chen",
""
],
[
"Zhang",
"Pan-Pan",
""
],
[
"Wu",
"Bin",
""
],
[
"Xu",
"Zhen-Ming",
""
]
] | In this study, we obtain specific picture of the phase transitions for the 6-dimensional Gauss-Bonnet Anti-de Sitter (AdS) black hole with triple phases, using the generalized free energy we constructed and Kramers escape rate in stochastic motion. There are six possible phase transition processes between the three dif... |
0804.3955 | Sergey Tarabrin | Sergey P. Tarabrin and Sergey P. Vyatchanin | Displacement-noise-free gravitational-wave detection with a single
Fabry-Perot cavity: a toy model | 16 pages, 5 figures; extended discussion of basic mechanism of noise
cancelation moved to new Sec. II (with new figure), added discussion of laser
noise cancelation in Sec. VI D (with new figure) | Phys.Lett.A372:6801-6812,2008 | 10.1016/j.physleta.2008.09.055 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a detuned Fabry-Perot cavity, pumped through both the mirrors, as
\textit{a toy model} of the gravitational-wave (GW) detector partially free
from displacement noise of the test masses. It is demonstrated that the noise
of cavity mirrors can be eliminated, but the one of lasers and detectors
cannot. The is... | [
{
"created": "Thu, 24 Apr 2008 17:37:45 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Nov 2008 08:11:19 GMT",
"version": "v2"
}
] | 2008-12-18 | [
[
"Tarabrin",
"Sergey P.",
""
],
[
"Vyatchanin",
"Sergey P.",
""
]
] | We propose a detuned Fabry-Perot cavity, pumped through both the mirrors, as \textit{a toy model} of the gravitational-wave (GW) detector partially free from displacement noise of the test masses. It is demonstrated that the noise of cavity mirrors can be eliminated, but the one of lasers and detectors cannot. The isol... |
2404.02940 | Kharanshu N. Solanki Mr. | Kharanshu N. Solanki, Karim Mosani, Omkar Deshpande and Pankaj S.
Joshi | Tipler Naked Singularities in $N$ Dimensions | Final version (accepted in Class. Quant. Grav.) | null | 10.1088/1361-6382/ad6115 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | A spacetime singularity, identified by the existence of incomplete causal
geodesics in the spacetime, is called a (Tipler) strong curvature singularity
if the volume form acting on independent Jacobi fields along causal geodesics
vanishes in the approach of the singularity. It is called naked if at least one
of these... | [
{
"created": "Wed, 3 Apr 2024 11:02:45 GMT",
"version": "v1"
},
{
"created": "Sun, 7 Apr 2024 03:08:19 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Apr 2024 12:31:15 GMT",
"version": "v3"
},
{
"created": "Tue, 16 Apr 2024 22:02:13 GMT",
"version": "v4"
},
{
"cre... | 2024-07-15 | [
[
"Solanki",
"Kharanshu N.",
""
],
[
"Mosani",
"Karim",
""
],
[
"Deshpande",
"Omkar",
""
],
[
"Joshi",
"Pankaj S.",
""
]
] | A spacetime singularity, identified by the existence of incomplete causal geodesics in the spacetime, is called a (Tipler) strong curvature singularity if the volume form acting on independent Jacobi fields along causal geodesics vanishes in the approach of the singularity. It is called naked if at least one of these c... |
gr-qc/0212060 | null | K.Ghosh | Entropy of Scalar Field in 3+1 Dimensional Reissner-Nordstrom de Sitter
Black Hole Background | Latex,15 pages; a few discussions added, a new reference added | null | null | null | gr-qc | null | We consider the thermodynamics of minimally coupled massive scalar field in
3+1 dimensional constant curvature black hole background. The brick wall model
of 't Hooft is used. When Schwarzschild like coordinates are used it is found
that two radial brick wall cut-off parameters are required to regularize the
solution... | [
{
"created": "Fri, 13 Dec 2002 11:29:30 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Mar 2004 13:34:57 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Ghosh",
"K.",
""
]
] | We consider the thermodynamics of minimally coupled massive scalar field in 3+1 dimensional constant curvature black hole background. The brick wall model of 't Hooft is used. When Schwarzschild like coordinates are used it is found that two radial brick wall cut-off parameters are required to regularize the solution. ... |
1308.6565 | Luis Granda | L. N. Granda | Natural scaling for dark energy | 18 pages, 8 figures | null | 10.1142/S0217732313501174 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a dark energy density based on the Gauss-Bonnet 4-dimensional
invariant and its modification. This model avoids the necessity of introducing
the black hole limit to define the holographic density, since it can be
considered as a non-saturated regime. This allows to describe the dark energy
with an equation... | [
{
"created": "Thu, 29 Aug 2013 19:15:49 GMT",
"version": "v1"
}
] | 2013-08-30 | [
[
"Granda",
"L. N.",
""
]
] | We propose a dark energy density based on the Gauss-Bonnet 4-dimensional invariant and its modification. This model avoids the necessity of introducing the black hole limit to define the holographic density, since it can be considered as a non-saturated regime. This allows to describe the dark energy with an equation o... |
gr-qc/9511019 | Ugo Moschella | J. Bros and U. Moschella | Two-point Functions and Quantum Fields in de Sitter Universe | 51 p, uuencoded, LaTex, epsf, 2 figures included | Rev.Math.Phys. 8 (1996) 327-392 | 10.1142/S0129055X96000123 | Saclay preprint SPhT 94/160, to appear in Rev. Math. Phys | gr-qc | null | We present a theory of general two-point functions and of generalized free
fields in d-dimensional de Sitter space-time which closely parallels the
corresponding minkowskian theory. The usual spectral condition is now replaced
by a certain geodesic spectral condition, equivalent to a precise thermal
characterization ... | [
{
"created": "Mon, 6 Nov 1995 12:06:08 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Bros",
"J.",
""
],
[
"Moschella",
"U.",
""
]
] | We present a theory of general two-point functions and of generalized free fields in d-dimensional de Sitter space-time which closely parallels the corresponding minkowskian theory. The usual spectral condition is now replaced by a certain geodesic spectral condition, equivalent to a precise thermal characterization of... |
1606.03383 | Vladimir Shevchenko | Vladimir Shevchenko, Efim Shevrin | Archimedes Force on Casimir Apparatus | 13 pages, 1 figure | null | 10.1142/S0217732316501662 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We address a problem of Casimir apparatus in dense medium and weak
gravitational field. The falling of the apparatus has to be governed by the
equivalence principle, with proper account for contributions to the weight of
the apparatus from its material part and from distorted quantum fields. We
discuss general expres... | [
{
"created": "Thu, 9 Jun 2016 16:30:23 GMT",
"version": "v1"
}
] | 2016-09-21 | [
[
"Shevchenko",
"Vladimir",
""
],
[
"Shevrin",
"Efim",
""
]
] | We address a problem of Casimir apparatus in dense medium and weak gravitational field. The falling of the apparatus has to be governed by the equivalence principle, with proper account for contributions to the weight of the apparatus from its material part and from distorted quantum fields. We discuss general expressi... |
gr-qc/0203071 | Sergio Dain | Osvaldo M. Moreschi and Sergio Dain | Estimates of the total gravitation radiation in the head-on black hole
collision | 10 pages, 2 figures, LaTeX2e | Phys.Rev.D53:1745-1749,1996 | 10.1103/PhysRevD.53.R1745 | null | gr-qc | null | We report on calculations of the total gravitational energy radiated in the
head-on black hole collision, where we use the geometry of the
Robinson-Trautman metrics.
| [
{
"created": "Thu, 21 Mar 2002 15:49:50 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Moreschi",
"Osvaldo M.",
""
],
[
"Dain",
"Sergio",
""
]
] | We report on calculations of the total gravitational energy radiated in the head-on black hole collision, where we use the geometry of the Robinson-Trautman metrics. |
2208.04473 | Hussain Gohar | Ilim \c{C}imdiker, Mariusz P. Dabrowski and Hussain Gohar | Equilibrium Temperature for Black Holes with Nonextensive Entropy | 19 pages, some sections merged, accepted for publication in Eur.
Phys. J. C | Eur. Phys. J. C (2023) 83:169 | 10.1140/epjc/s10052-023-11317-0 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Hawking temperature has been widely utilised in the literature as the
temperature that corresponds to various nonextensive entropies. In this study,
we analyze the compatibility of the Hawking temperature with the nonextensive
entropies. We demonstrate that, for every nonextensive entropy, one may define
an effective... | [
{
"created": "Tue, 9 Aug 2022 00:23:09 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Feb 2023 17:55:38 GMT",
"version": "v2"
}
] | 2023-02-24 | [
[
"Çimdiker",
"Ilim",
""
],
[
"Dabrowski",
"Mariusz P.",
""
],
[
"Gohar",
"Hussain",
""
]
] | Hawking temperature has been widely utilised in the literature as the temperature that corresponds to various nonextensive entropies. In this study, we analyze the compatibility of the Hawking temperature with the nonextensive entropies. We demonstrate that, for every nonextensive entropy, one may define an effective t... |
1705.07694 | Puxun Wu | Puxun Wu, Jiawei Hu and Hongwei Yu | Interaction between two gravitationally polarizable objects induced by
thermal bath of gravitons | 11 pages. Accepted by PRD | null | 10.1103/PhysRevD.95.104057 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quadrupole-quadrupole interaction between a pair of gravitationally
polarizable objects induced by vacuum fluctuations of the quantum linearized
gravitational field is first obtained with a relatively simple method, which is
then used to investigate the contribution of thermal fluctuations of a bath of
gravitons ... | [
{
"created": "Mon, 22 May 2017 12:31:06 GMT",
"version": "v1"
}
] | 2017-06-28 | [
[
"Wu",
"Puxun",
""
],
[
"Hu",
"Jiawei",
""
],
[
"Yu",
"Hongwei",
""
]
] | The quadrupole-quadrupole interaction between a pair of gravitationally polarizable objects induced by vacuum fluctuations of the quantum linearized gravitational field is first obtained with a relatively simple method, which is then used to investigate the contribution of thermal fluctuations of a bath of gravitons to... |
0808.4002 | Alessandro Nagar | Luca Baiotti, Sebastiano Bernuzzi, Giovanni Corvino, Roberto De
Pietri, Alessandro Nagar | Gravitational-Wave Extraction from Neutron Star Oscillations: comparing
linear and nonlinear techniques | 27 pages, 18 figures. Published in Phys. Rev. D | Phys.Rev.D79:024002,2009 | 10.1103/PhysRevD.79.024002 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The main aim of this study is the comparison of gravitational waveforms
obtained from numerical simulations which employ different numerical evolution
approaches and different wave-extraction techniques. For this purpose, we
evolve an oscillating, non-rotating polytropic neutron-star model with two
different approach... | [
{
"created": "Thu, 28 Aug 2008 21:47:58 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Sep 2008 08:37:41 GMT",
"version": "v2"
},
{
"created": "Wed, 11 Mar 2009 13:37:35 GMT",
"version": "v3"
}
] | 2009-03-11 | [
[
"Baiotti",
"Luca",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Corvino",
"Giovanni",
""
],
[
"De Pietri",
"Roberto",
""
],
[
"Nagar",
"Alessandro",
""
]
] | The main aim of this study is the comparison of gravitational waveforms obtained from numerical simulations which employ different numerical evolution approaches and different wave-extraction techniques. For this purpose, we evolve an oscillating, non-rotating polytropic neutron-star model with two different approaches... |
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