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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/0512163 | Daniel Hofmann | D. Hofmann, W. Kummer | IR Renormalisation of General Effective Actions and Hawking Flux in 2D
Gravity Theories | 25 pages | Eur.Phys.J.C48:291-301,2006 | 10.1140/epjc/s2006-02553-3 | TUW-05-18 | gr-qc | null | The infrared problem of the effective action in 2D is discussed in the
framework of the Covariant Perturbation Theory. The divergences are regularised
by a mass and the leading term is evaluated up to the third order of
perturbation theory. A summation scheme is proposed which isolates the
divergences from the finite... | [
{
"created": "Thu, 29 Dec 2005 16:14:37 GMT",
"version": "v1"
}
] | 2009-01-07 | [
[
"Hofmann",
"D.",
""
],
[
"Kummer",
"W.",
""
]
] | The infrared problem of the effective action in 2D is discussed in the framework of the Covariant Perturbation Theory. The divergences are regularised by a mass and the leading term is evaluated up to the third order of perturbation theory. A summation scheme is proposed which isolates the divergences from the finite p... |
0805.3978 | W{\l}odzimierz Natorf | W. Natorf, J. Tafel | Horizons in Robinson-Trautman space-times | 11p | Class.Quant.Grav.25:195012,2008 | 10.1088/0264-9381/25/19/195012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The past quasi-local horizons in vacuum Robinson-Trautman spacetimes are
described. The case of a null (non-expanding) horizon is discussed. It is shown
that the only Robinson-Trautman space-time admitting such a horizon with
sections diffeomorphic to S_2 is the Schwarzschild space-time. Weakening this
condition lead... | [
{
"created": "Mon, 26 May 2008 14:58:58 GMT",
"version": "v1"
},
{
"created": "Fri, 18 Jul 2008 13:29:39 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Natorf",
"W.",
""
],
[
"Tafel",
"J.",
""
]
] | The past quasi-local horizons in vacuum Robinson-Trautman spacetimes are described. The case of a null (non-expanding) horizon is discussed. It is shown that the only Robinson-Trautman space-time admitting such a horizon with sections diffeomorphic to S_2 is the Schwarzschild space-time. Weakening this condition leads ... |
1510.05515 | Borja Reina | Borja Reina, Jos\'e M. M. Senovilla, Ra\"ul Vera | Junction conditions in quadratic gravity: thin shells and double layers | 43 pages, 1 figure | null | 10.1088/0264-9381/33/10/105008 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The junction conditions for the most general gravitational theory with a
Lagrangian containing terms quadratic in the curvature are derived. We include
the cases with a possible concentration of matter on the joining hypersurface
-termed as thin shells, domain walls or braneworlds in the literature- as well
as the pr... | [
{
"created": "Mon, 19 Oct 2015 15:09:12 GMT",
"version": "v1"
}
] | 2016-04-27 | [
[
"Reina",
"Borja",
""
],
[
"Senovilla",
"José M. M.",
""
],
[
"Vera",
"Raül",
""
]
] | The junction conditions for the most general gravitational theory with a Lagrangian containing terms quadratic in the curvature are derived. We include the cases with a possible concentration of matter on the joining hypersurface -termed as thin shells, domain walls or braneworlds in the literature- as well as the prop... |
gr-qc/9807053 | Wang Bin | Bin Wang, Ru-Keng Su and P.K.N.Yu | Quantum entropy of two-dimensional extreme charged dilaton black hole | Latex version, to be published on Phys.Lett.B | Phys.Lett. B438 (1998) 47-51 | 10.1016/S0370-2693(98)00947-2 | null | gr-qc | null | By using Hawking's treatment as well as Zaslavskii's treatment respectively
and the brick wall model, two different values of classical entropy and quantum
entropy of scalar fields in the two-dimensional extreme charged dilaton black
hole backgrounds have been obtained. A new divergent term emerges in the
quantum ent... | [
{
"created": "Mon, 20 Jul 1998 14:09:02 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Wang",
"Bin",
""
],
[
"Su",
"Ru-Keng",
""
],
[
"Yu",
"P. K. N.",
""
]
] | By using Hawking's treatment as well as Zaslavskii's treatment respectively and the brick wall model, two different values of classical entropy and quantum entropy of scalar fields in the two-dimensional extreme charged dilaton black hole backgrounds have been obtained. A new divergent term emerges in the quantum entro... |
gr-qc/9802046 | David Hochberg | David Hochberg and Matt Visser | Dynamic wormholes, anti-trapped surfaces, and energy conditions | 32 pages in plain LaTex, no figures. Additional text and references
added | Phys.Rev.D58:044021,1998 | 10.1103/PhysRevD.58.044021 | LAEFF-98/01 | gr-qc | null | Adapting and extending a suggestion due to Page, we define a wormhole throat
to be a marginally anti-trapped surface, that is, a closed two-dimensional
spatial hypersurface such that one of the two future-directed null geodesic
congruences orthogonal to it is just beginning to diverge. Typically a dynamic
wormhole wi... | [
{
"created": "Tue, 17 Feb 1998 18:02:23 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Jun 1998 09:38:03 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Hochberg",
"David",
""
],
[
"Visser",
"Matt",
""
]
] | Adapting and extending a suggestion due to Page, we define a wormhole throat to be a marginally anti-trapped surface, that is, a closed two-dimensional spatial hypersurface such that one of the two future-directed null geodesic congruences orthogonal to it is just beginning to diverge. Typically a dynamic wormhole will... |
2011.06736 | Zhen-Ming Xu | Zhen-Ming Xu | Analytic phase structures and thermodynamic curvature for the charged
AdS black hole in alternative phase space | 15 pages,1 figure, accepted by Frontiers of Physics | Frontiers of Physics 16(2) 24502 (2021) | 10.1007/s11467-020-1038-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we visit the thermodynamic criticality and thermodynamic
curvature of the charged AdS black hole in a new phase space. It is shown that
when the square of the total charge of the charged black hole is considered as
a thermodynamic quantity, the charged AdS black hole also admits an van der
Waals-type c... | [
{
"created": "Fri, 13 Nov 2020 02:56:56 GMT",
"version": "v1"
}
] | 2021-01-01 | [
[
"Xu",
"Zhen-Ming",
""
]
] | In this paper, we visit the thermodynamic criticality and thermodynamic curvature of the charged AdS black hole in a new phase space. It is shown that when the square of the total charge of the charged black hole is considered as a thermodynamic quantity, the charged AdS black hole also admits an van der Waals-type cri... |
gr-qc/0101011 | Yakov Itin | Shmuel Kaniel and Yakov Itin | On the derivation of the equations of motion in theories of gravity | 17 pages | null | null | null | gr-qc math-ph math.MP | null | The equations of motion of massive particles in GR are completely determined
by the field equation. We utilize the particular form of Einstein's field
equation and propose for the $N$-body problem of the equations that are Lorentz
invariant a novel algorithm for the derivation of the equations of motion from
the fiel... | [
{
"created": "Tue, 2 Jan 2001 09:34:50 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kaniel",
"Shmuel",
""
],
[
"Itin",
"Yakov",
""
]
] | The equations of motion of massive particles in GR are completely determined by the field equation. We utilize the particular form of Einstein's field equation and propose for the $N$-body problem of the equations that are Lorentz invariant a novel algorithm for the derivation of the equations of motion from the field ... |
2311.15784 | Javlon Rayimbaev Javlon | Muhammad Ali Raza, Furkat Sarikulov, Javlon Rayimbaev, Muhammad
Zubair, Bobomurat Ahmedov, Zdenek Stuchlik | Shadow of novel rotating black holes in GR coupled to nonlinear
electrodynamics and constraints from EHT results | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the optical properties of spacetime around a novel regular black
hole (BH) in general relativity (GR) coupled to nonlinear electrodynamics
(NED), which is asymptotically flat. First, we study the angular velocity and
Lyapunov exponent in unstable photon circular orbits in the novel spherically
symmetric BH s... | [
{
"created": "Mon, 27 Nov 2023 12:56:35 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Dec 2023 05:56:50 GMT",
"version": "v2"
}
] | 2023-12-04 | [
[
"Raza",
"Muhammad Ali",
""
],
[
"Sarikulov",
"Furkat",
""
],
[
"Rayimbaev",
"Javlon",
""
],
[
"Zubair",
"Muhammad",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Stuchlik",
"Zdenek",
""
]
] | We study the optical properties of spacetime around a novel regular black hole (BH) in general relativity (GR) coupled to nonlinear electrodynamics (NED), which is asymptotically flat. First, we study the angular velocity and Lyapunov exponent in unstable photon circular orbits in the novel spherically symmetric BH spa... |
2110.01074 | Carlos A. S. Almeida | F. C. E. Lima and C. A. S. Almeida | Compact-like vortices in isotropic curved spacetime | 17 pages, 5 figures. To appear in Annals of Physics | null | 10.1016/j.aop.2021.168648 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduced a generalized Maxwell-Higgs model in a $(3+1)$ isotropic
spacetime, and we found their stationary solutions using the BPS approach in
curved spacetime. In order to investigate the compact-like vortices, we assume
a particular choice for the generalization term. The model is controlled by a
potential dri... | [
{
"created": "Sun, 3 Oct 2021 19:11:27 GMT",
"version": "v1"
}
] | 2021-11-17 | [
[
"Lima",
"F. C. E.",
""
],
[
"Almeida",
"C. A. S.",
""
]
] | We introduced a generalized Maxwell-Higgs model in a $(3+1)$ isotropic spacetime, and we found their stationary solutions using the BPS approach in curved spacetime. In order to investigate the compact-like vortices, we assume a particular choice for the generalization term. The model is controlled by a potential drive... |
0807.2507 | Juan A. Valiente-Kroon | JA Valiente Kroon | Regularity conditions at spatial infinity revisited | 41 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The regular finite initial value problem at infinity is used to obtain
regularity conditions on the freely specifiable parts of initial data for the
vacuum Einstein equations with non-vanishing second fundamental form. These
conditions ensure that the solutions of the propagation equations implied by
the conformal Ei... | [
{
"created": "Wed, 16 Jul 2008 07:29:36 GMT",
"version": "v1"
}
] | 2008-07-17 | [
[
"Kroon",
"JA Valiente",
""
]
] | The regular finite initial value problem at infinity is used to obtain regularity conditions on the freely specifiable parts of initial data for the vacuum Einstein equations with non-vanishing second fundamental form. These conditions ensure that the solutions of the propagation equations implied by the conformal Eins... |
gr-qc/0604046 | Tae Hoon Lee | Tae Hoon Lee and Byung Joo Lee | Reply to "Comment on 'Scalar-tensor gravity coupled to a global monopole
and flat rotation curves' " | 4 pages, RevTeX4 file | Phys.Rev. D73 (2006) 128502 | 10.1103/PhysRevD.73.128502 | null | gr-qc | null | In Brans-Dicke theory of gravity we explain how the extra constant value in
the formula for rotation velocities of stars in a galactic halo can be obtained
due to the global monopole field. We argue on a few points of the preceding
Comment and discuss improvement of our model.
| [
{
"created": "Mon, 10 Apr 2006 13:19:21 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Lee",
"Tae Hoon",
""
],
[
"Lee",
"Byung Joo",
""
]
] | In Brans-Dicke theory of gravity we explain how the extra constant value in the formula for rotation velocities of stars in a galactic halo can be obtained due to the global monopole field. We argue on a few points of the preceding Comment and discuss improvement of our model. |
1712.06517 | Bob Holdom | Randy S. Conklin, Bob Holdom and Jing Ren | Gravitational wave echoes through new windows | 37 pages, 19 figures, matches version to be published in PRD | Phys. Rev. D 98, 044021 (2018) | 10.1103/PhysRevD.98.044021 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There has been a striking realization that physics resolving the black hole
information paradox could imply postmerger gravitational wave echoes. We here
report on evidence for echoes from the LIGO compact binary merger events,
GW151226, GW170104, GW170608, GW170814, as well as the neutron star merger
GW170817. There... | [
{
"created": "Mon, 18 Dec 2017 16:52:44 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Jan 2018 17:46:00 GMT",
"version": "v2"
},
{
"created": "Wed, 30 May 2018 18:27:03 GMT",
"version": "v3"
},
{
"created": "Mon, 6 Aug 2018 00:31:02 GMT",
"version": "v4"
}
] | 2018-08-23 | [
[
"Conklin",
"Randy S.",
""
],
[
"Holdom",
"Bob",
""
],
[
"Ren",
"Jing",
""
]
] | There has been a striking realization that physics resolving the black hole information paradox could imply postmerger gravitational wave echoes. We here report on evidence for echoes from the LIGO compact binary merger events, GW151226, GW170104, GW170608, GW170814, as well as the neutron star merger GW170817. There i... |
1911.06908 | Daniela Doneva | Daniela D. Doneva, Stoytcho S. Yazadjiev | Topological neutron stars in tensor-multi-scalar theories of gravity | 6 pages, 6 figures | Phys. Rev. D 101, 064072 (2020) | 10.1103/PhysRevD.101.064072 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present paper we demonstrate that there exists a new type of neutron
stars in the tensor-multi-scalar theories of gravity. We call this new type of
neutron stars topological neutron stars. In addition to the standard
characteristics of the usual neutron stars the topological neutron stars are
also characterize... | [
{
"created": "Fri, 15 Nov 2019 23:22:30 GMT",
"version": "v1"
}
] | 2020-04-08 | [
[
"Doneva",
"Daniela D.",
""
],
[
"Yazadjiev",
"Stoytcho S.",
""
]
] | In the present paper we demonstrate that there exists a new type of neutron stars in the tensor-multi-scalar theories of gravity. We call this new type of neutron stars topological neutron stars. In addition to the standard characteristics of the usual neutron stars the topological neutron stars are also characterized ... |
1408.5669 | Dirk Puetzfeld | Dirk Puetzfeld, Yuri N. Obukhov | Equations of motion in metric-affine gravity: A covariant unified
framework | 13 pages, RevTex format. Dedicated to Friedrich W. Hehl on the
occasion of his birthday | Phys. Rev. D 90 (2014) 085034 | 10.1103/PhysRevD.90.084034 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive the equations of motion of extended deformable bodies in
metric-affine gravity. The conservation laws which follow from the invariance
of the action under the general coordinate transformations are used as a
starting point for the discussion of the dynamics of extended deformable test
bodies. By means of a ... | [
{
"created": "Mon, 25 Aug 2014 06:44:57 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Oct 2014 08:41:37 GMT",
"version": "v2"
}
] | 2014-10-22 | [
[
"Puetzfeld",
"Dirk",
""
],
[
"Obukhov",
"Yuri N.",
""
]
] | We derive the equations of motion of extended deformable bodies in metric-affine gravity. The conservation laws which follow from the invariance of the action under the general coordinate transformations are used as a starting point for the discussion of the dynamics of extended deformable test bodies. By means of a co... |
0710.5169 | Keisuke Taniguchi | Keisuke Taniguchi, Thomas W. Baumgarte, Joshua A. Faber, and Stuart L.
Shapiro | Relativistic black hole-neutron star binaries in quasiequilibrium:
effects of the black hole excision boundary condition | Minor corrections, Fig.8 revised, 15 pages, 15 figures, published in
Phys. Rev. D | Phys.Rev.D77:044003,2008 | 10.1103/PhysRevD.77.044003 | null | gr-qc astro-ph | null | We construct new models of black hole-neutron star binaries in
quasiequilibrium circular orbits by solving Einstein's constraint equations in
the conformal thin-sandwich decomposition together with the relativistic
equations of hydrostationary equilibrium. We adopt maximal slicing, assume
spatial conformal flatness, ... | [
{
"created": "Fri, 26 Oct 2007 20:00:06 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Dec 2007 16:50:53 GMT",
"version": "v2"
},
{
"created": "Fri, 1 Feb 2008 21:06:05 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Taniguchi",
"Keisuke",
""
],
[
"Baumgarte",
"Thomas W.",
""
],
[
"Faber",
"Joshua A.",
""
],
[
"Shapiro",
"Stuart L.",
""
]
] | We construct new models of black hole-neutron star binaries in quasiequilibrium circular orbits by solving Einstein's constraint equations in the conformal thin-sandwich decomposition together with the relativistic equations of hydrostationary equilibrium. We adopt maximal slicing, assume spatial conformal flatness, an... |
1704.06077 | Albert V. Minkevich | A.V. Minkevich | Vacuum torsion and regular accelerating Universe without dark matter | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The simplest gauge gravitation theory in Riemann-Cartan space-time leading to
the solution of the problem of cosmological singularity and dark energy problem
is investigated with purpose to solve the dark matter problem. It is shown that
the interaction of the vacuum torsion field with proper angular moments of
gravi... | [
{
"created": "Thu, 20 Apr 2017 10:15:25 GMT",
"version": "v1"
},
{
"created": "Mon, 8 May 2017 08:21:49 GMT",
"version": "v2"
}
] | 2017-05-09 | [
[
"Minkevich",
"A. V.",
""
]
] | The simplest gauge gravitation theory in Riemann-Cartan space-time leading to the solution of the problem of cosmological singularity and dark energy problem is investigated with purpose to solve the dark matter problem. It is shown that the interaction of the vacuum torsion field with proper angular moments of gravita... |
1810.11621 | Przemyslaw Malkiewicz | Przemys{\l}aw Ma{\l}kiewicz | Hamiltonian formalism and gauge-fixing conditions for cosmological
perturbation theory | 38 pages, 1 figure, includes a discussion of the relation between the
Dirac observables and the gauge-invariant variables such as the Bardeen
potentials or the Mukhanov-Sasaki variable | Class. Quantum Grav. 36 (2019) 215003 | 10.1088/1361-6382/ab45aa | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the Dirac procedure for constrained systems to the
Arnowitt-Deser-Misner formalism linearized around the Friedmann-Lemaitre
universe. We explain and employ some basic concepts such as Dirac observables,
Dirac brackets, gauge-fixing conditions, reduced phase space, physical
Hamiltonian and physical dynamics. ... | [
{
"created": "Sat, 27 Oct 2018 08:57:35 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Dec 2018 09:36:48 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Oct 2019 09:09:12 GMT",
"version": "v3"
}
] | 2019-10-30 | [
[
"Małkiewicz",
"Przemysław",
""
]
] | We apply the Dirac procedure for constrained systems to the Arnowitt-Deser-Misner formalism linearized around the Friedmann-Lemaitre universe. We explain and employ some basic concepts such as Dirac observables, Dirac brackets, gauge-fixing conditions, reduced phase space, physical Hamiltonian and physical dynamics. In... |
gr-qc/0502122 | Dimitrios Giannios | Dimitrios Giannios | Spherically symmetric, static spacetimes in a tensor-vector-scalar
theory | 12 pages, accepted for publication in Phys. Rev. D | Phys.Rev. D71 (2005) 103511 | 10.1103/PhysRevD.71.103511 | null | gr-qc astro-ph | null | Recently, a relativistic gravitation theory has been proposed [J. D.
Bekenstein, Phys. Rev. D {\bf 70}, 083509 (2004)] that gives the Modified
Newtonian Dynamics (or MOND) in the weak acceleration regime. The theory is
based on three dynamic gravitational fields and succeeds in explaining a large
part of extragalacti... | [
{
"created": "Mon, 28 Feb 2005 19:09:52 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Apr 2005 13:58:24 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Giannios",
"Dimitrios",
""
]
] | Recently, a relativistic gravitation theory has been proposed [J. D. Bekenstein, Phys. Rev. D {\bf 70}, 083509 (2004)] that gives the Modified Newtonian Dynamics (or MOND) in the weak acceleration regime. The theory is based on three dynamic gravitational fields and succeeds in explaining a large part of extragalactic ... |
0810.1083 | Luis Herrera | L. Herrera, N.O. Santos, A. Wang | Shearing Expansion-free Spherical Anisotropic Fluid Evolution | 24 Latex pages. To appear in Phys. Rev. D | Phys.Rev.D78:084026,2008 | 10.1103/PhysRevD.78.084026 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Spherically symmetric expansionfree distributions are systematically studied.
The whole set of field equations and junction conditions are presented for a
general distribution of dissipative anisotropic fluid (principal stresses
unequal), and the expansionfree condition is integrated. In order to understand
the physi... | [
{
"created": "Tue, 7 Oct 2008 01:57:32 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Herrera",
"L.",
""
],
[
"Santos",
"N. O.",
""
],
[
"Wang",
"A.",
""
]
] | Spherically symmetric expansionfree distributions are systematically studied. The whole set of field equations and junction conditions are presented for a general distribution of dissipative anisotropic fluid (principal stresses unequal), and the expansionfree condition is integrated. In order to understand the physica... |
1103.2723 | Daniele Pranzetti | Jonathan Engle, Karim Noui, Alejandro Perez, Daniele Pranzetti | The SU(2) Black Hole entropy revisited | 31 pages, 8 figures | JHEP 1105 (2011) 016 | 10.1007/JHEP05(2011)016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the state-counting problem that arises in the SU(2) black hole
entropy calculation in loop quantum gravity. More precisely, we compute the
leading term and the logarithmic correction of both the spherically symmetric
and the distorted SU(2) black holes. Contrary to what has been done in previous
works, we ha... | [
{
"created": "Mon, 14 Mar 2011 17:37:24 GMT",
"version": "v1"
}
] | 2012-08-15 | [
[
"Engle",
"Jonathan",
""
],
[
"Noui",
"Karim",
""
],
[
"Perez",
"Alejandro",
""
],
[
"Pranzetti",
"Daniele",
""
]
] | We study the state-counting problem that arises in the SU(2) black hole entropy calculation in loop quantum gravity. More precisely, we compute the leading term and the logarithmic correction of both the spherically symmetric and the distorted SU(2) black holes. Contrary to what has been done in previous works, we have... |
0910.0325 | Ming Lei Tong | Ming-Lei Tong, Yang Zhang | Relic Gravitational Waves with A Running Spectral Index and Its
Constraints at High Frequencies | 17 pages, 10 figures, Accepted by PRD | Phys.Rev.D80:084022,2009 | 10.1103/PhysRevD.80.084022 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the impact of a running index $\alpha_t$ on the spectrum of relic
gravitational waves (RGWs) over the whole range of frequency $(10^{-18}\sim
10^{10})$ Hz and reveal its implications in RGWs detections and in cosmology.
Analytical calculations show that, although the spectrum of RGWs on low
frequencies is le... | [
{
"created": "Fri, 2 Oct 2009 05:03:41 GMT",
"version": "v1"
}
] | 2009-10-29 | [
[
"Tong",
"Ming-Lei",
""
],
[
"Zhang",
"Yang",
""
]
] | We study the impact of a running index $\alpha_t$ on the spectrum of relic gravitational waves (RGWs) over the whole range of frequency $(10^{-18}\sim 10^{10})$ Hz and reveal its implications in RGWs detections and in cosmology. Analytical calculations show that, although the spectrum of RGWs on low frequencies is less... |
0903.4876 | Lorenzo Sindoni | Florian Girelli, Stefano Liberati and Lorenzo Sindoni | Is the notion of time really fundamental? | 9 pages, 2 figures. Fourth prize essay for the competition of the
Foundational Questions Institute (fqxi.org) on the Nature of Time | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | From the Physics point of view, time is now best described through General
Relativity, as part of space-time which is a dynamical object encoding gravity.
Time possesses also some intrinsic irreversibility due to thermodynamics,
quantum mechanical effects... This irreversibility can look puzzling since
time-like loop... | [
{
"created": "Fri, 27 Mar 2009 19:02:20 GMT",
"version": "v1"
}
] | 2009-03-30 | [
[
"Girelli",
"Florian",
""
],
[
"Liberati",
"Stefano",
""
],
[
"Sindoni",
"Lorenzo",
""
]
] | From the Physics point of view, time is now best described through General Relativity, as part of space-time which is a dynamical object encoding gravity. Time possesses also some intrinsic irreversibility due to thermodynamics, quantum mechanical effects... This irreversibility can look puzzling since time-like loops ... |
gr-qc/9511021 | Azreg-Ainou Mustapha | Mustapha Azreg-Ainou | Solutions Stationnaires en Th\'eorie de Kaluza-Klein | Minor errors corrected. 120 pages, LaTeX, no figures. A thesis
submitted in conformity with the requirements for the degree of Docteur
Es-Sciences at the Institut Non Lin\'eaire de Nice (INLN), France | null | null | null | gr-qc | null | Kaluza-Klein theory is a 5-dimensional Einstein general relativity; it has
the interest of describing on an equal footing the laws of gravitation and
electromagnetism in a geometrically unified way. We present it in Chapter 1,
and we generalize it by adding to the equations of the theory the Lanczos
tensor (endowed w... | [
{
"created": "Mon, 6 Nov 1995 15:14:10 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Dec 1995 13:41:47 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Azreg-Ainou",
"Mustapha",
""
]
] | Kaluza-Klein theory is a 5-dimensional Einstein general relativity; it has the interest of describing on an equal footing the laws of gravitation and electromagnetism in a geometrically unified way. We present it in Chapter 1, and we generalize it by adding to the equations of the theory the Lanczos tensor (endowed wit... |
0910.5124 | Gamal G.L. Nashed | Gamal G.L. Nashed | Brane World black holes in Teleparallel Theory Equivalent to General
Relativity and their Killing vectors, Energy, Momentum and Angular-Momentum | 24 pages. Will appear in Chinese Phys. No. 2 (2010) | Chin.Phys.B19:020401,2010 | 10.1088/1674-1056/19/2/020401 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The energy-momentum tensor, which is coordinate independent, is used to
calculate energy, momentum and angular-momentum of two different tetrad fields.
Although, the two tetrad fields reproduce the same space-time their energies
are different. Therefore, a regularized expression of the gravitational
energy-momentum t... | [
{
"created": "Tue, 27 Oct 2009 14:05:04 GMT",
"version": "v1"
}
] | 2010-03-04 | [
[
"Nashed",
"Gamal G. L.",
""
]
] | The energy-momentum tensor, which is coordinate independent, is used to calculate energy, momentum and angular-momentum of two different tetrad fields. Although, the two tetrad fields reproduce the same space-time their energies are different. Therefore, a regularized expression of the gravitational energy-momentum ten... |
1408.4598 | Andrea Geralico | Donato Bini, Christian Cherubini, Andrea Geralico, Robert T. Jantzen | Physical frames along circular orbits in stationary axisymmetric
spacetimes | 26 pages, 5 figures; published version | Gen. Relativ. Gravit. 40, 985 (2008) | 10.1007/s10714-007-0587-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Three natural classes of orthonormal frames, namely Frenet-Serret,
Fermi-Walker and parallel transported frames, exist along any timelike world
line in spacetime. Their relationships are investigated for timelike circular
orbits in stationary axisymmetric spacetimes, and illustrated for black hole
spacetimes.
| [
{
"created": "Wed, 20 Aug 2014 10:40:28 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Bini",
"Donato",
""
],
[
"Cherubini",
"Christian",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Jantzen",
"Robert T.",
""
]
] | Three natural classes of orthonormal frames, namely Frenet-Serret, Fermi-Walker and parallel transported frames, exist along any timelike world line in spacetime. Their relationships are investigated for timelike circular orbits in stationary axisymmetric spacetimes, and illustrated for black hole spacetimes. |
2111.07817 | Grigory Volovik | G.E. Volovik | Gravity from symmetry breaking phase transition | 6 pages, no figures, devoted to the memory of Dmitry Diakonov | null | 10.1007/s10909-022-02694-z | null | gr-qc cond-mat.other hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The paper is devoted to the memory of Dmitry Diakonov. We discuss gravity
emerging in the fermionic vacuum as suggested by Diakonov 10 years ago in his
paper "Towards lattice-regularized Quantum Gravity". Gravity emerges in the
phase transition. The order parameter in this transition is the tetrad field,
which appear... | [
{
"created": "Mon, 15 Nov 2021 15:00:37 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Nov 2021 18:49:47 GMT",
"version": "v2"
},
{
"created": "Sat, 27 Nov 2021 15:16:11 GMT",
"version": "v3"
},
{
"created": "Wed, 15 Dec 2021 15:42:24 GMT",
"version": "v4"
}
] | 2022-03-30 | [
[
"Volovik",
"G. E.",
""
]
] | The paper is devoted to the memory of Dmitry Diakonov. We discuss gravity emerging in the fermionic vacuum as suggested by Diakonov 10 years ago in his paper "Towards lattice-regularized Quantum Gravity". Gravity emerges in the phase transition. The order parameter in this transition is the tetrad field, which appears ... |
2109.04477 | Filip Hejda | Filip Hejda, Jos\'e P. S. Lemos, Oleg B. Zaslavskii | Extraction of energy from an extremal rotating electrovacuum black hole:
Particle collisions in the equatorial plane | 25 pages, 2 tables, 1 figure | Phys. Rev. D 105, 024014 (2022) | 10.1103/PhysRevD.105.024014 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The collisional Penrose process received much attention when Banados, Silk
and West (BSW) pointed out the possibility of test-particle collisions with
arbitrarily high center-of-mass energy in the vicinity of the horizon of an
extremally rotating black hole. However, the energy that can be extracted from
the black ho... | [
{
"created": "Thu, 9 Sep 2021 18:00:00 GMT",
"version": "v1"
},
{
"created": "Sun, 27 Feb 2022 19:29:54 GMT",
"version": "v2"
}
] | 2022-03-02 | [
[
"Hejda",
"Filip",
""
],
[
"Lemos",
"José P. S.",
""
],
[
"Zaslavskii",
"Oleg B.",
""
]
] | The collisional Penrose process received much attention when Banados, Silk and West (BSW) pointed out the possibility of test-particle collisions with arbitrarily high center-of-mass energy in the vicinity of the horizon of an extremally rotating black hole. However, the energy that can be extracted from the black hole... |
1706.02376 | Manuel Hohmann | Manuel Hohmann, Laur Jarv, Ulbossyn Ualikhanova | Dynamical systems approach and generic properties of $f(T)$ cosmology | 45 pages, 3 figures; journal version | Phys. Rev. D 96, 043508 (2017) | 10.1103/PhysRevD.96.043508 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a systematic analysis of the dynamics of flat
Friedmann-Lema\^{i}tre-Robertson-Walker cosmological models with radiation and
dust matter in generalized teleparallel $f(T)$ gravity. We show that the
cosmological dynamics of this model is fully described by a function $W(H)$ of
the Hubble parameter, which is... | [
{
"created": "Wed, 7 Jun 2017 20:42:22 GMT",
"version": "v1"
},
{
"created": "Sun, 3 Sep 2017 15:02:59 GMT",
"version": "v2"
}
] | 2017-09-05 | [
[
"Hohmann",
"Manuel",
""
],
[
"Jarv",
"Laur",
""
],
[
"Ualikhanova",
"Ulbossyn",
""
]
] | We present a systematic analysis of the dynamics of flat Friedmann-Lema\^{i}tre-Robertson-Walker cosmological models with radiation and dust matter in generalized teleparallel $f(T)$ gravity. We show that the cosmological dynamics of this model is fully described by a function $W(H)$ of the Hubble parameter, which is c... |
gr-qc/9504029 | Ding Shuxue | Shuxue Ding (Tokyo Institute of Technology) | Dynamics of Yang-Mills Cosmology Bubbles in Bartnik-McKinnon Spacetimes | Latex, 36 preprint pages, 6 unencoded figures | null | null | TIT/HEP-272/COSMO-49 | gr-qc | null | We investigate the dynamics of a Yang-Mills cosmology (YMC, the FRW type
spacetime) bubble in the Bartnik-McKinnon (BK) spacetimes. Because a BK
spacetime can be identified to a YMC spacetime with a finite scale factor in
the neighborhood of the origin, we can give a natural initial condition for the
YMC bubble. The ... | [
{
"created": "Thu, 20 Apr 1995 09:22:47 GMT",
"version": "v1"
},
{
"created": "Mon, 1 May 1995 10:32:53 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Ding",
"Shuxue",
"",
"Tokyo Institute of Technology"
]
] | We investigate the dynamics of a Yang-Mills cosmology (YMC, the FRW type spacetime) bubble in the Bartnik-McKinnon (BK) spacetimes. Because a BK spacetime can be identified to a YMC spacetime with a finite scale factor in the neighborhood of the origin, we can give a natural initial condition for the YMC bubble. The YM... |
gr-qc/0106049 | Ernst Schmutzer | E.Schmutzer | Distribution of Dark Matter around a Central Body, Pioneer Effect and
Fifth Force | 11 pages, 7 figures, LaTeX | Astronom. Nachr. 322 (2001) 93 | 10.1002/1521-3994(200106)322:2<93::AID-ASNA93>3.0.CO;2-D | null | gr-qc | null | Within the framework of the Projective Unified Field Theory the distribution
of a dark matter gas around a central body is calculated. As a result the
well-known formulas of the Newtonian gravitational interaction are altered.
This dark matter effect leads to an additional radial force (towards the
center) in the equ... | [
{
"created": "Thu, 14 Jun 2001 14:16:18 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Schmutzer",
"E.",
""
]
] | Within the framework of the Projective Unified Field Theory the distribution of a dark matter gas around a central body is calculated. As a result the well-known formulas of the Newtonian gravitational interaction are altered. This dark matter effect leads to an additional radial force (towards the center) in the equat... |
gr-qc/0302030 | Gian Paolo Vacca | A. Tronconi, G.P. Vacca, G. Venturi | The Inflaton and Time in the Matter-Gravity System | 14 pages, latex | Phys.Rev.D67:063517,2003 | 10.1103/PhysRevD.67.063517 | null | gr-qc astro-ph hep-th quant-ph | null | The emergence of time in the matter-gravity system is addressed within the
context of the inflationary paradigm. A quantum minisuperspace-homogeneous
minimally coupled inflaton system is studied with suitable initial conditions
leading to inflation and the system is approximately solved in the limit for
large scale f... | [
{
"created": "Mon, 10 Feb 2003 11:11:00 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Tronconi",
"A.",
""
],
[
"Vacca",
"G. P.",
""
],
[
"Venturi",
"G.",
""
]
] | The emergence of time in the matter-gravity system is addressed within the context of the inflationary paradigm. A quantum minisuperspace-homogeneous minimally coupled inflaton system is studied with suitable initial conditions leading to inflation and the system is approximately solved in the limit for large scale fac... |
1712.10182 | Yichen Shi | Alexandru Lupsasca, Achilleas P. Porfyriadis, Yichen Shi | Critical Emission from a High-Spin Black Hole | 12 pages, 3 figures. v2: minor edits, matches published version | Phys. Rev. D 97, 064017 (2018) | 10.1103/PhysRevD.97.064017 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a rapidly spinning black hole surrounded by an equatorial,
geometrically thin, slowly accreting disk that is stationary and axisymmetric.
We analytically compute the broadening of electromagnetic line emissions from
the innermost part of the disk, which resides in the near-horizon region. The
result is in... | [
{
"created": "Fri, 29 Dec 2017 11:23:54 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Mar 2018 22:12:19 GMT",
"version": "v2"
}
] | 2018-03-26 | [
[
"Lupsasca",
"Alexandru",
""
],
[
"Porfyriadis",
"Achilleas P.",
""
],
[
"Shi",
"Yichen",
""
]
] | We consider a rapidly spinning black hole surrounded by an equatorial, geometrically thin, slowly accreting disk that is stationary and axisymmetric. We analytically compute the broadening of electromagnetic line emissions from the innermost part of the disk, which resides in the near-horizon region. The result is inde... |
2211.04929 | David Kofro\v{n} | David Kofro\v{n}, Petr Kotla\v{r}\'ik | Debye superpotential for charged rings or circular currents on Kerr
black hole | to appear is Phys Rev D (accepted) | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | We provide an explicit, closed and compact expression for the Debye
superpotential of a circular source. This superpotential is obtained by
integrating the Green function of Teukolsky Master Equation (TME). The Debye
potential itself is then, for a particular configuration, calculated in the
same manner as the $\phi_... | [
{
"created": "Wed, 9 Nov 2022 14:58:05 GMT",
"version": "v1"
}
] | 2022-11-10 | [
[
"Kofroň",
"David",
""
],
[
"Kotlařík",
"Petr",
""
]
] | We provide an explicit, closed and compact expression for the Debye superpotential of a circular source. This superpotential is obtained by integrating the Green function of Teukolsky Master Equation (TME). The Debye potential itself is then, for a particular configuration, calculated in the same manner as the $\phi_0$... |
gr-qc/0109074 | Andri M. Gretarsson | D. R. M. Crooks, P. Sneddon, G. Cagnoli, J. Hough, S. Rowan, M. M.
Fejer, E. Gustafson, R. Route, N. Nakagawa, D. Coyne, G. M. Harry, A. M.
Gretarsson | Excess Mechanical Loss Associated with Dielectric Mirror Coatings on
Test Masses in Interferometric Gravitational Wave Detectors | Submitted to LSC (internal) review Sept. 20, 2001. To be submitted to
Phys. Lett. A | Class.Quant.Grav. 19 (2002) 883-896; Erratum-ibid. 19 (2002) 4229 | 10.1088/0264-9381/19/15/502 | null | gr-qc | null | Interferometric gravitational wave detectors use mirrors whose substrates are
formed from materials of low intrinsic mechanical dissipation. The two most
likely choices for the test masses in future advanced detectors are fused
silica or sapphire. These test masses must be coated to form mirrors, highly
reflecting at... | [
{
"created": "Thu, 20 Sep 2001 22:00:37 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Crooks",
"D. R. M.",
""
],
[
"Sneddon",
"P.",
""
],
[
"Cagnoli",
"G.",
""
],
[
"Hough",
"J.",
""
],
[
"Rowan",
"S.",
""
],
[
"Fejer",
"M. M.",
""
],
[
"Gustafson",
"E.",
""
],
[
"Route",
"R.",
... | Interferometric gravitational wave detectors use mirrors whose substrates are formed from materials of low intrinsic mechanical dissipation. The two most likely choices for the test masses in future advanced detectors are fused silica or sapphire. These test masses must be coated to form mirrors, highly reflecting at 1... |
1902.08442 | LSC P&P Committee | The LIGO Scientific Collaboration and the Virgo Collaboration: B. P.
Abbott, R. Abbott, T. D. Abbott, S. Abraham, F. Acernese, K. Ackley, C.
Adams, R. X. Adhikari, V. B. Adya, C. Affeldt, M. Agathos, K. Agatsuma, N.
Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, G. Allen, A. Allocca, M.
A. Aloy, P. A. Alt... | Narrow-band search for gravitational waves from known pulsars using the
second LIGO observing run | 6 figures, 4 tables | Phys. Rev. D 99, 122002 (2019) | 10.1103/PhysRevD.99.122002 | LIGO-P1800391 | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Isolated spinning neutron stars, asymmetric with respect to their rotation
axis, are expected to be sources of continuous gravitational waves. The most
sensitive searches for these sources are based on accurate matched filtering
techniques, that assume the continuous wave to be phase-locked with the pulsar
beamed emi... | [
{
"created": "Fri, 22 Feb 2019 11:32:46 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Feb 2019 11:38:04 GMT",
"version": "v2"
},
{
"created": "Thu, 6 Jun 2019 15:11:35 GMT",
"version": "v3"
}
] | 2019-07-03 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""
],
[
"Abraham",
"S.",
""
],
[
"Acernese",
"F.",
... | Isolated spinning neutron stars, asymmetric with respect to their rotation axis, are expected to be sources of continuous gravitational waves. The most sensitive searches for these sources are based on accurate matched filtering techniques, that assume the continuous wave to be phase-locked with the pulsar beamed emiss... |
0904.4904 | Kirill Bronnikov | K.A. Bronnikov, O.B. Zaslavskii | General static black holes in matter | 6 pages latex | Class.Quant.Grav.26:165004,2009 | 10.1088/0264-9381/26/16/165004 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For arbitrary static space-times, it is shown that an equilibrium between a
Killing horizon and matter is only possible for some discrete values of the
parameter $w = p_1/\rho$, where $\rho$ is the density and $p_1$ is pressure in
the direction normal to the horizon. In the generic situation of a simple
(non-extremal... | [
{
"created": "Thu, 30 Apr 2009 18:07:39 GMT",
"version": "v1"
}
] | 2010-04-14 | [
[
"Bronnikov",
"K. A.",
""
],
[
"Zaslavskii",
"O. B.",
""
]
] | For arbitrary static space-times, it is shown that an equilibrium between a Killing horizon and matter is only possible for some discrete values of the parameter $w = p_1/\rho$, where $\rho$ is the density and $p_1$ is pressure in the direction normal to the horizon. In the generic situation of a simple (non-extremal) ... |
gr-qc/0507061 | Sotirios Bonanos | S. Bonanos | On a choice of the Bondi radial coordinate and news function for the
axisymmetric two-body problem | 13 pages, LaTeX, submitted to Classical and Quantum Gravity; v2
corrected a few typos and added some comments; v3 expanded discussion and
added references -- Rejected by CQG; v4: 8 pages revtex4 2 column,
extensively revised, submitted to Phys Rev D; v5: 21 pages revtex4 preprint;
further discussion of physical... | Phys.Rev. D73 (2006) 124003 | 10.1103/PhysRevD.73.124003 | null | gr-qc | null | In the Bondi formulation of the axisymmetric vacuum Einstein equations, we
argue that the ``surface area'' coordinate condition determining the ``radial''
coordinate can be considered as part of the initial data and should be chosen
in a way that gives information about the physical problem whose solution is
sought. ... | [
{
"created": "Thu, 14 Jul 2005 09:52:30 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Sep 2005 11:35:32 GMT",
"version": "v2"
},
{
"created": "Tue, 8 Nov 2005 09:08:24 GMT",
"version": "v3"
},
{
"created": "Fri, 20 Jan 2006 09:18:58 GMT",
"version": "v4"
},
{
"cre... | 2007-05-23 | [
[
"Bonanos",
"S.",
""
]
] | In the Bondi formulation of the axisymmetric vacuum Einstein equations, we argue that the ``surface area'' coordinate condition determining the ``radial'' coordinate can be considered as part of the initial data and should be chosen in a way that gives information about the physical problem whose solution is sought. Fo... |
1309.2012 | David Hilditch | David Hilditch | An Introduction to Well-posedness and Free-evolution | Lecture notes from the NRHEP spring school held at IST-Lisbon, March
2013. To be published by IJMPA (V. Cardoso, L. Gualtieri, C. Herdeiro and U.
Sperhake, Eds., 2013) | International Journal of Modern Physics A Vol. 28 (2013) 1340015 | 10.1142/S0217751X13400150 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | These lecture notes accompany two classes given at the NRHEP2 school. In the
first lecture I introduce the basic concepts used for analyzing well-posedness,
that is the existence of a unique solution depending continuously on given
data, of evolution partial differential equations. I show how strong
hyperbolicity gua... | [
{
"created": "Sun, 8 Sep 2013 21:27:46 GMT",
"version": "v1"
}
] | 2013-09-10 | [
[
"Hilditch",
"David",
""
]
] | These lecture notes accompany two classes given at the NRHEP2 school. In the first lecture I introduce the basic concepts used for analyzing well-posedness, that is the existence of a unique solution depending continuously on given data, of evolution partial differential equations. I show how strong hyperbolicity guara... |
gr-qc/9404040 | Robert Mann | K.C.K. Chan and R.B. Mann | Static Charged Black Holes in $(2+1)$ Dimensional Dilaton Gravity | 17 pgs., 4 figures (appended as postscript files), WATPHYS-TH94/01
(one reference added) | Phys.Rev.D50:6385,1994; Erratum-ibid.D52:2600,1995;
Phys.Rev.D52:2600,1995 | 10.1103/PhysRevD.50.6385 10.1103/PhysRevD.52.2600 | null | gr-qc | null | A one parameter family of static charged black hole solutions in
$(2+1)$-dimensional general relativity minimally coupled to a dilaton
$\phi\propto ln({r\over\beta})$ with a potential term $e^{b\phi}\Lambda$ is
obtained. Their causal strutures are investigated, and thermodynamical
temperature and entropy are computed... | [
{
"created": "Thu, 21 Apr 1994 21:12:08 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Apr 1994 16:08:09 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Chan",
"K. C. K.",
""
],
[
"Mann",
"R. B.",
""
]
] | A one parameter family of static charged black hole solutions in $(2+1)$-dimensional general relativity minimally coupled to a dilaton $\phi\propto ln({r\over\beta})$ with a potential term $e^{b\phi}\Lambda$ is obtained. Their causal strutures are investigated, and thermodynamical temperature and entropy are computed. ... |
1301.2424 | Luis Herrera | L. Herrera, A. Di Prisco, J. Iba\~nez and J. Ospino | Axially symmetric static sources: A general framework and some
analytical solutions | Revtex4, 12 pages. Published in Phys. Rev. D | Phys. Rev. D 87, 024014 (2013) | 10.1103/PhysRevD.87.024014 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide all basic equations and concepts required to carry out a general
study on axially symmetric static sources. The Einstein equations and the
conservation equations are written down for a general anisotropic static fluid
endowed with axial symmetry. The structure scalars are calculated and the
inhomogeneity f... | [
{
"created": "Fri, 11 Jan 2013 09:11:03 GMT",
"version": "v1"
}
] | 2015-06-12 | [
[
"Herrera",
"L.",
""
],
[
"Di Prisco",
"A.",
""
],
[
"Ibañez",
"J.",
""
],
[
"Ospino",
"J.",
""
]
] | We provide all basic equations and concepts required to carry out a general study on axially symmetric static sources. The Einstein equations and the conservation equations are written down for a general anisotropic static fluid endowed with axial symmetry. The structure scalars are calculated and the inhomogeneity fac... |
2009.14058 | Mariusz P. Dabrowski | Adam Balcerzak, Samuel Barroso-Bellido, Mariusz P. Dabrowski, and
Salvador Robles-Perez | Entanglement entropy at critical points of classical evolution in
oscillatory and exotic singularity multiverse models | 14 pages, 11 figures, 1 table, REVTEX4-1 | Phys. Rev. D 103, 043507 (2021) | 10.1103/PhysRevD.103.043507 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Using the 3rd quantization formalism we study the quantum entanglement of
universes created in pairs within the framework of standard homogeneous and
isotropic cosmology. In particular, we investigate entanglement quantities
(entropy, temperature) around maxima, minima and inflection points of the
classical evolution... | [
{
"created": "Tue, 29 Sep 2020 14:46:58 GMT",
"version": "v1"
}
] | 2021-02-10 | [
[
"Balcerzak",
"Adam",
""
],
[
"Barroso-Bellido",
"Samuel",
""
],
[
"Dabrowski",
"Mariusz P.",
""
],
[
"Robles-Perez",
"Salvador",
""
]
] | Using the 3rd quantization formalism we study the quantum entanglement of universes created in pairs within the framework of standard homogeneous and isotropic cosmology. In particular, we investigate entanglement quantities (entropy, temperature) around maxima, minima and inflection points of the classical evolution. ... |
1901.10069 | Amit Ghosh | Amit Ghosh | Hawking Radiation -- Revisited | 12 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we revisited Hawking radiation in the light of the original
calculations of Hawking and Wald and found that some additional insights can be
gained. We review a "derivation" of the field theory Hilbert space from the
space of solutions, followed by the calculation of Bogoliubov coefficients in a
collapse... | [
{
"created": "Tue, 29 Jan 2019 02:18:24 GMT",
"version": "v1"
}
] | 2019-01-30 | [
[
"Ghosh",
"Amit",
""
]
] | In this paper we revisited Hawking radiation in the light of the original calculations of Hawking and Wald and found that some additional insights can be gained. We review a "derivation" of the field theory Hilbert space from the space of solutions, followed by the calculation of Bogoliubov coefficients in a collapsed ... |
2101.05987 | Jian-Pin Wu | Jiali Shi and Jian-Pin Wu | Dynamics of k-essence in loop quantum cosmology | 23 pages, 13 figures | null | 10.1088/1674-1137/abe111 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper, we study the dynamics of k-essence in loop quantum cosmology
(LQC). The study indicates that the loop quantum gravity (LQG) effect plays a
key role only in the early epoch of the universe and is diluted at the later
stage. The fixed points in LQC are basically consistent with that in standard
Friedmann... | [
{
"created": "Fri, 15 Jan 2021 06:49:37 GMT",
"version": "v1"
}
] | 2021-05-26 | [
[
"Shi",
"Jiali",
""
],
[
"Wu",
"Jian-Pin",
""
]
] | In this paper, we study the dynamics of k-essence in loop quantum cosmology (LQC). The study indicates that the loop quantum gravity (LQG) effect plays a key role only in the early epoch of the universe and is diluted at the later stage. The fixed points in LQC are basically consistent with that in standard Friedmann-R... |
0905.3168 | Alejandro Perez | Jonathan Engle, Karim Noui, and Alejandro Perez | Black hole entropy and SU(2) Chern-Simons theory | Final form, to appear in Phys. Rev. Lett. Some extra details on the
constraint algebra added, some details on the quantization have been omitted
to comply with PRL length standards (they appear however in arXiv:1006.0634) | Phys.Rev.Lett.105:031302,2010 | 10.1103/PhysRevLett.105.031302 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black holes in equilibrium can be defined locally in terms of the so-called
isolated horizon boundary condition given on a null surface representing the
event horizon. We show that this boundary condition can be treated in a
manifestly SU(2) invariant manner. Upon quantization, state counting is
expressed in terms of... | [
{
"created": "Tue, 19 May 2009 20:58:47 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jul 2009 10:22:36 GMT",
"version": "v2"
},
{
"created": "Wed, 30 Jun 2010 13:47:31 GMT",
"version": "v3"
}
] | 2014-11-20 | [
[
"Engle",
"Jonathan",
""
],
[
"Noui",
"Karim",
""
],
[
"Perez",
"Alejandro",
""
]
] | Black holes in equilibrium can be defined locally in terms of the so-called isolated horizon boundary condition given on a null surface representing the event horizon. We show that this boundary condition can be treated in a manifestly SU(2) invariant manner. Upon quantization, state counting is expressed in terms of t... |
1012.1307 | Parampreet Singh | Parampreet Singh, Francesca Vidotto | Exotic singularities and spatially curved Loop Quantum Cosmology | 12 pages, 9 figures | Phys.Rev.D83:064027,2011 | 10.1103/PhysRevD.83.064027 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the occurrence of various exotic spacelike singularities in
the past and the future evolution of $k = \pm 1$ Friedmann-Robertson-Walker
model and loop quantum cosmology using a sufficiently general phenomenological
model for the equation of state. We highlight the non-trivial role played by
the intrins... | [
{
"created": "Mon, 6 Dec 2010 20:44:16 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Singh",
"Parampreet",
""
],
[
"Vidotto",
"Francesca",
""
]
] | We investigate the occurrence of various exotic spacelike singularities in the past and the future evolution of $k = \pm 1$ Friedmann-Robertson-Walker model and loop quantum cosmology using a sufficiently general phenomenological model for the equation of state. We highlight the non-trivial role played by the intrinsic... |
1705.02416 | Peng Huang | Peng Huang, Yue Huang | Dark energy and normalization of cosmological wave function in modified
gravitations | 10 pages, no figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on Wheeler-DeWitt equation derived from general relativity, it had been
found that only dark energy can lead to a normalizable cosmological wave
function. It is shown in the present work that, for dRGT gravity,
Eddington-inspired-Born-Infeld gravity and Ho$\check{\text{r}}$ava-Lifshitz
gravity, the previous con... | [
{
"created": "Fri, 5 May 2017 23:18:48 GMT",
"version": "v1"
}
] | 2017-05-09 | [
[
"Huang",
"Peng",
""
],
[
"Huang",
"Yue",
""
]
] | Based on Wheeler-DeWitt equation derived from general relativity, it had been found that only dark energy can lead to a normalizable cosmological wave function. It is shown in the present work that, for dRGT gravity, Eddington-inspired-Born-Infeld gravity and Ho$\check{\text{r}}$ava-Lifshitz gravity, the previous concl... |
1905.08012 | Cosimo Bambi | Askar B. Abdikamalov, Dimitry Ayzenberg, Cosimo Bambi, Sourabh
Nampalliwar, Ashutosh Tripathi, Jelen Wong, Yerong Xu, Jinli Yan, Yunfeng
Yan, Yuchan Yang | Testing general relativity with supermassive black holes using X-ray
reflection spectroscopy | 22 pages, 12 figures. Review article prepared for a Special Issue of
Universe and based on some talks given at the meeting "Recent Progress in
Relativistic Astrophysics" (6-8 May 2019, Shanghai, China) | Proceedings 17, 2 (2019) | 10.3390/proceedings2019017002 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we review our current efforts to test General Relativity in
the strong field regime by studying the reflection spectrum of supermassive
black holes. So far we have analyzed 11 sources with observations of NuSTAR,
Suzaku, Swift, and XMM-Newton. Our results are consistent with general
relativity, accordi... | [
{
"created": "Mon, 20 May 2019 11:57:48 GMT",
"version": "v1"
}
] | 2019-06-19 | [
[
"Abdikamalov",
"Askar B.",
""
],
[
"Ayzenberg",
"Dimitry",
""
],
[
"Bambi",
"Cosimo",
""
],
[
"Nampalliwar",
"Sourabh",
""
],
[
"Tripathi",
"Ashutosh",
""
],
[
"Wong",
"Jelen",
""
],
[
"Xu",
"Yerong",
""
... | In this paper, we review our current efforts to test General Relativity in the strong field regime by studying the reflection spectrum of supermassive black holes. So far we have analyzed 11 sources with observations of NuSTAR, Suzaku, Swift, and XMM-Newton. Our results are consistent with general relativity, according... |
0801.3781 | Tae Hoon Lee | S. T. Hong, J. Lee, T. H. Lee, and P. OH | Higher dimensional cosmological model with a phantom field | 4 pages, 2 figures; References added | Phys.Rev.D78:047503,2008 | 10.1103/PhysRevD.78.047503 | null | gr-qc | null | We consider a higher dimensional gravity theory with a negative kinetic
energy scalar field and a cosmological constant. We find that the theory admits
an exact cosmological solution for the scale factor of our universe. It has the
feature that the universe undergoes a continuous transition from deceleration
to accel... | [
{
"created": "Thu, 24 Jan 2008 15:21:25 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Feb 2008 04:53:48 GMT",
"version": "v2"
},
{
"created": "Wed, 21 May 2008 05:29:41 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Hong",
"S. T.",
""
],
[
"Lee",
"J.",
""
],
[
"Lee",
"T. H.",
""
],
[
"OH",
"P.",
""
]
] | We consider a higher dimensional gravity theory with a negative kinetic energy scalar field and a cosmological constant. We find that the theory admits an exact cosmological solution for the scale factor of our universe. It has the feature that the universe undergoes a continuous transition from deceleration to acceler... |
1503.04434 | Sunil Maurya DR. | S.K.Maurya, Y.K. Gupta, M.K. Jasim | Relativistic modelling of stable anisotropic super-dense star | Accepted in Reports on Mathematical Physics, ISSN: 0034-4877-
(ELSEVIER), 23 pages, 5 figures. arXiv admin note: text overlap with
arXiv:1502.03378, arXiv:1410.5808 by other authors | null | 10.1016/S0034-4877(15)30016-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the present article we have obtained new set of exact solutions of
Einstein field equations for anisotropic fluid spheres by using the Herrera et
al.[1] algorithm. The anisotropic fluid solution so obtained join continuously
to Schwarzschild exterior solution across the pressure free boundary. It is
observed that ... | [
{
"created": "Sun, 15 Mar 2015 15:25:38 GMT",
"version": "v1"
},
{
"created": "Mon, 13 Apr 2015 16:47:26 GMT",
"version": "v2"
}
] | 2015-09-30 | [
[
"Maurya",
"S. K.",
""
],
[
"Gupta",
"Y. K.",
""
],
[
"Jasim",
"M. K.",
""
]
] | In the present article we have obtained new set of exact solutions of Einstein field equations for anisotropic fluid spheres by using the Herrera et al.[1] algorithm. The anisotropic fluid solution so obtained join continuously to Schwarzschild exterior solution across the pressure free boundary. It is observed that mo... |
gr-qc/9703066 | Bernd Bruegmann | Steven Brandt, Bernd Bruegmann | A simple construction of initial data for multiple black holes | 4 pages, LaTeX (RevTeX), minor changes, improved presentation, to
appear in PRL | Phys.Rev.Lett.78:3606-3609,1997 | 10.1103/PhysRevLett.78.3606 | null | gr-qc | null | We consider the initial data problem for several black holes in vacuum with
arbitrary momenta and spins on a three space with punctures. We compactify the
internal asymptotically flat regions to obtain a computational domain without
inner boundaries. When treated numerically, this leads to a significant
simplificatio... | [
{
"created": "Mon, 24 Mar 1997 11:38:22 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Apr 1997 12:19:48 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Brandt",
"Steven",
""
],
[
"Bruegmann",
"Bernd",
""
]
] | We consider the initial data problem for several black holes in vacuum with arbitrary momenta and spins on a three space with punctures. We compactify the internal asymptotically flat regions to obtain a computational domain without inner boundaries. When treated numerically, this leads to a significant simplification ... |
0805.4696 | Jonathan Engle | Jonathan Engle and Roberto Pereira | Regularization and finiteness of the Lorentzian LQG vertices | 16 pages; Added an appendix presenting the gauge-fixing
interpretation, added three references, and made some minor changes | Phys.Rev.D79:084034,2009 | 10.1103/PhysRevD.79.084034 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give an explicit form for the Lorentzian vertices recently introduced for
possibly defining the dynamics of loop quantum gravity. As a result of so
doing, a natural regularization of the vertices is suggested. The regularized
vertices are then proven to be finite. An interpretation of the regularization
in terms o... | [
{
"created": "Fri, 30 May 2008 08:40:39 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Apr 2009 21:57:16 GMT",
"version": "v2"
}
] | 2009-11-06 | [
[
"Engle",
"Jonathan",
""
],
[
"Pereira",
"Roberto",
""
]
] | We give an explicit form for the Lorentzian vertices recently introduced for possibly defining the dynamics of loop quantum gravity. As a result of so doing, a natural regularization of the vertices is suggested. The regularized vertices are then proven to be finite. An interpretation of the regularization in terms of ... |
2107.02889 | Pardyumn Kumar Sahoo | Avik De, Tee-How Loo, Raja Solanki and P.K. Sahoo | How a conformally flat (GR)4 impacts Gauss-Bonnet gravity? | 10 pages, 6 figures: Revised version submitted to Fortschritte der
Physik - Progress of Physics | Fortschritte der Physik (2021) 69(10), 2100088 | 10.1002/prop.202100088 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | First and foremost, we show that a 4-dimensional conformally flat generalized
Ricci recurrent spacetime $(GR)_4$ is an Einstein manifold. We examine such a
spacetime as a solution of $f(R, G)$-gravity theory and it is shown that the
additional terms from the modification of the gravitational sector can be
expressed a... | [
{
"created": "Mon, 5 Jul 2021 15:28:12 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Jul 2021 10:18:33 GMT",
"version": "v2"
}
] | 2021-11-16 | [
[
"De",
"Avik",
""
],
[
"Loo",
"Tee-How",
""
],
[
"Solanki",
"Raja",
""
],
[
"Sahoo",
"P. K.",
""
]
] | First and foremost, we show that a 4-dimensional conformally flat generalized Ricci recurrent spacetime $(GR)_4$ is an Einstein manifold. We examine such a spacetime as a solution of $f(R, G)$-gravity theory and it is shown that the additional terms from the modification of the gravitational sector can be expressed as ... |
2111.14639 | Raihaneh Moti | Raihaneh Moti (Ferdowsi U.), Ali Shojai (Tehran U.) | On the quantum gravastar | null | null | 10.1142/S0218271822500675 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we show that it is possible to have pure quantum gravastar
solution to the quantum improved Einstein equations. Such an object is
essentially a gravastar in which the thin layer of matter is replaced by
quantum effects. The metric of a pure quantum gravastar is obtained and its
stability is discussed.
| [
{
"created": "Mon, 29 Nov 2021 15:53:16 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Aug 2022 07:18:53 GMT",
"version": "v2"
}
] | 2022-08-30 | [
[
"Moti",
"Raihaneh",
"",
"Ferdowsi U."
],
[
"Shojai",
"Ali",
"",
"Tehran U."
]
] | In this paper, we show that it is possible to have pure quantum gravastar solution to the quantum improved Einstein equations. Such an object is essentially a gravastar in which the thin layer of matter is replaced by quantum effects. The metric of a pure quantum gravastar is obtained and its stability is discussed. |
0808.2271 | L. C. Garcia de Andrade | Garcia de Andrade | Kerr-Schild Riemannian acoustic black holes in dynamo plasma laboratory | Departamento de fisica teorica-if-uerj-Brasil | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Since Alfven, dynamo and sound waves and the existence of general
relativistic black holes are well stablished in plasma physics, this provides
enough motivation to investigate the presence of acoustic black-hole effective
metric of analogue Einstein's gravity in dynamo flows. From nonlinear dynamo
equations, one obt... | [
{
"created": "Sat, 16 Aug 2008 20:43:49 GMT",
"version": "v1"
}
] | 2008-08-19 | [
[
"de Andrade",
"Garcia",
""
]
] | Since Alfven, dynamo and sound waves and the existence of general relativistic black holes are well stablished in plasma physics, this provides enough motivation to investigate the presence of acoustic black-hole effective metric of analogue Einstein's gravity in dynamo flows. From nonlinear dynamo equations, one obtai... |
gr-qc/0207002 | Choquet-Bruhat | Yvonne Choquet-Bruhat and James W. York | Bianchi - Euler system for relativistice fluids and Bel - Robinson type
energy | 10 pages | null | null | null | gr-qc | null | We write a first order symmetric hyperbolic system coupling the Riemann with
the dynamical acceleration of a relativistic fluid. W determine the associated,
coupled, Bel - Robinson energy, and the integral equality that it satisfies.
| [
{
"created": "Sat, 29 Jun 2002 13:46:32 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Choquet-Bruhat",
"Yvonne",
""
],
[
"York",
"James W.",
""
]
] | We write a first order symmetric hyperbolic system coupling the Riemann with the dynamical acceleration of a relativistic fluid. W determine the associated, coupled, Bel - Robinson energy, and the integral equality that it satisfies. |
2310.16025 | Sophia Morton | Sophia Morton, Stefano Rinaldi, Alejandro Torres-Orjuela, Andrea
Derdzinski, Maria Paola Vaccaro, Walter Del Pozzo | GW190521: a binary black hole merger inside an active galactic nucleus? | 11 pages, 5 figures | null | null | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | GW190521, the most massive binary black hole merger confidently detected by
the LIGO-Virgo-KAGRA collaboration, is the first gravitational-wave observation
of an intermediate-mass black hole. The signal was followed approximately 34
days later by flare ZTF19abanrhr, detected in AGN J124942.3+344929 by the
Zwicky Tran... | [
{
"created": "Tue, 24 Oct 2023 17:41:58 GMT",
"version": "v1"
},
{
"created": "Thu, 14 Dec 2023 20:13:44 GMT",
"version": "v2"
}
] | 2023-12-18 | [
[
"Morton",
"Sophia",
""
],
[
"Rinaldi",
"Stefano",
""
],
[
"Torres-Orjuela",
"Alejandro",
""
],
[
"Derdzinski",
"Andrea",
""
],
[
"Vaccaro",
"Maria Paola",
""
],
[
"Del Pozzo",
"Walter",
""
]
] | GW190521, the most massive binary black hole merger confidently detected by the LIGO-Virgo-KAGRA collaboration, is the first gravitational-wave observation of an intermediate-mass black hole. The signal was followed approximately 34 days later by flare ZTF19abanrhr, detected in AGN J124942.3+344929 by the Zwicky Transi... |
1904.02367 | Owen Pavel Fern\'andez Piedra | Owen Pavel Fern\'andez Piedra | Vacuum polarization of the quantized massive scalar field in the global
monopole spacetime I: the field fluctuation | 27 pages, 3 figures | Phys. Rev. D 101, 125016 (2020) | 10.1103/PhysRevD.101.125016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the vacuum polarization of a massive scalar field $\phi$ with
arbitrary coupling to gravity in pointlike global monopole spacetime. Using
Schwinger-DeWitt proper time formalism, we calculate the vacuum expectation
value $<\phi^{2}>$, when the Compton length of the quantum field is much less
than the characte... | [
{
"created": "Thu, 4 Apr 2019 06:11:45 GMT",
"version": "v1"
}
] | 2020-07-01 | [
[
"Piedra",
"Owen Pavel Fernández",
""
]
] | We study the vacuum polarization of a massive scalar field $\phi$ with arbitrary coupling to gravity in pointlike global monopole spacetime. Using Schwinger-DeWitt proper time formalism, we calculate the vacuum expectation value $<\phi^{2}>$, when the Compton length of the quantum field is much less than the characteri... |
1505.07479 | Steffen Gielen | Steffen Gielen | Identifying cosmological perturbations in group field theory condensates | 21 pages; v2: corrected minor typos, matches published version | JHEP 1508 (2015) 010 | 10.1007/JHEP08(2015)010 | IMPERIAL-TP-2015-SG-1 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One proposal for deriving effective cosmological models from theories of
quantum gravity is to view the former as a mean-field (hydrodynamic)
description of the latter, which describes a universe formed by a 'condensate'
of quanta of geometry. This idea has been successfully applied within the
setting of group field ... | [
{
"created": "Wed, 27 May 2015 20:05:44 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Aug 2015 14:18:59 GMT",
"version": "v2"
}
] | 2015-08-12 | [
[
"Gielen",
"Steffen",
""
]
] | One proposal for deriving effective cosmological models from theories of quantum gravity is to view the former as a mean-field (hydrodynamic) description of the latter, which describes a universe formed by a 'condensate' of quanta of geometry. This idea has been successfully applied within the setting of group field th... |
0902.1268 | Dmitri Vassiliev | Olga Chervova and Dmitri Vassiliev | Massless Dirac equation as a special case of Cosserat elasticity | Submitted to the proceedings of the International Conference on
Recent Trends in Mathematical Sciences, Bahrain, 10-12 November 2008 | Journal of the Association of Arab Universities for Basic and
Applied Sciences, 2009, vol. 7, p. 25-42. (Proceedings of the International
Conference on Recent Trends in Mathematical Sciences, Bahrain, 10-12 November
2008.) | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We suggest an alternative mathematical model for the massless neutrino.
Consider an elastic continuum in 3-dimensional Euclidean space and assume that
points of this continuum can experience no displacements, only rotations. This
framework is a special case of the so-called Cosserat theory of elasticity.
Rotations of... | [
{
"created": "Sat, 7 Feb 2009 19:54:21 GMT",
"version": "v1"
}
] | 2010-07-20 | [
[
"Chervova",
"Olga",
""
],
[
"Vassiliev",
"Dmitri",
""
]
] | We suggest an alternative mathematical model for the massless neutrino. Consider an elastic continuum in 3-dimensional Euclidean space and assume that points of this continuum can experience no displacements, only rotations. This framework is a special case of the so-called Cosserat theory of elasticity. Rotations of p... |
1405.7439 | Jiliang Jing | Zehua Tian and Jiliang Jing | Distinguishing de Sitter universe from thermal Minkowski spacetime by
Casimir-Polder-like force | 11 pages | JHEP 07, (2014) 089 | 10.1007/JHEP07(2014)089 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate that the static ground state atom, which interacts with a
conformally coupled massless scalar field in the de Sitter invariant vacuum,
can obtain a position-dependent energy-level shift and this shift could cause a
Casimir-Polder-like force on it. Interestingly no such force arises on the
inertial atom... | [
{
"created": "Thu, 29 May 2014 02:04:34 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Jun 2014 02:09:51 GMT",
"version": "v2"
}
] | 2015-06-19 | [
[
"Tian",
"Zehua",
""
],
[
"Jing",
"Jiliang",
""
]
] | We demonstrate that the static ground state atom, which interacts with a conformally coupled massless scalar field in the de Sitter invariant vacuum, can obtain a position-dependent energy-level shift and this shift could cause a Casimir-Polder-like force on it. Interestingly no such force arises on the inertial atom b... |
1901.04306 | Kazuharu Bamba | G.G.L. Nashed and Kazuharu Bamba | Higher dimensional rotating black hole solutions in quadratic $f(R)$
gravitational theory and the conserved quantities | 15 pages, 2 figures, version accepted for publication in Entropy | null | null | FU-PCG-55 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the quadratic form of the $f(R)=R+bR^2$ gravitational theory to
derive rotating $N$-dimensions black hole solutions with $a_i, i\geq 1$
rotation parameters. Here, $R$ is the Ricci scalar, and $b$ is the dimensional
parameter. We assumed that the $N$-dimensional spacetime is static and has flat
horizons wit... | [
{
"created": "Wed, 9 Jan 2019 16:21:56 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Feb 2019 00:06:55 GMT",
"version": "v2"
},
{
"created": "Wed, 10 Mar 2021 14:01:38 GMT",
"version": "v3"
}
] | 2021-03-11 | [
[
"Nashed",
"G. G. L.",
""
],
[
"Bamba",
"Kazuharu",
""
]
] | We explore the quadratic form of the $f(R)=R+bR^2$ gravitational theory to derive rotating $N$-dimensions black hole solutions with $a_i, i\geq 1$ rotation parameters. Here, $R$ is the Ricci scalar, and $b$ is the dimensional parameter. We assumed that the $N$-dimensional spacetime is static and has flat horizons with ... |
2012.08570 | Astrid Eichhorn | Johanna N. Borissova and Astrid Eichhorn | Towards black-hole singularity-resolution in the Lorentzian
gravitational path integral | 18 pages plus references, 4 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Quantum Gravity is expected to resolve the singularities of classical General
Relativity. Based on destructive interference of singular
spacetime-configurations in the path integral, we find that higher-order
curvature terms may allow to resolve black-hole singularities both in the
spherically symmetric and axisymmet... | [
{
"created": "Tue, 15 Dec 2020 19:30:55 GMT",
"version": "v1"
}
] | 2020-12-17 | [
[
"Borissova",
"Johanna N.",
""
],
[
"Eichhorn",
"Astrid",
""
]
] | Quantum Gravity is expected to resolve the singularities of classical General Relativity. Based on destructive interference of singular spacetime-configurations in the path integral, we find that higher-order curvature terms may allow to resolve black-hole singularities both in the spherically symmetric and axisymmetri... |
2208.01845 | Fan Zhang | Fan Zhang, Lee Lindblom | Simple Numerical Solutions to the Einstein Constraints on Various
Three-Manifolds | 15 pages, 6 figures, published version | Gen Relativ Gravit 54, 131 (2022) | 10.1007/s10714-022-03014-2 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Numerical solutions to the Einstein constraint equations are constructed on a
selection of compact orientable three-dimensional manifolds with non-trivial
topologies. A simple constant mean curvature solution and a somewhat more
complicated non-constant mean curvature solution are computed on example
manifolds from t... | [
{
"created": "Wed, 3 Aug 2022 05:06:23 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Oct 2022 01:24:10 GMT",
"version": "v2"
}
] | 2022-10-27 | [
[
"Zhang",
"Fan",
""
],
[
"Lindblom",
"Lee",
""
]
] | Numerical solutions to the Einstein constraint equations are constructed on a selection of compact orientable three-dimensional manifolds with non-trivial topologies. A simple constant mean curvature solution and a somewhat more complicated non-constant mean curvature solution are computed on example manifolds from thr... |
1105.3703 | Norbert Bodendorfer | Norbert Bodendorfer, Thomas Thiemann, Andreas Thurn | New Variables for Classical and Quantum Gravity in all Dimensions I.
Hamiltonian Analysis | 28 pages. v2: Journal version. Minor clarifications | Class. Quantum Grav. 30 (2013) 045001 | 10.1088/0264-9381/30/4/045001 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Loop Quantum Gravity heavily relies on a connection formulation of General
Relativity such that 1. the connection Poisson commutes with itself and 2. the
corresponding gauge group is compact. This can be achieved starting from the
Palatini or Holst action when imposing the time gauge. Unfortunately, this
method is re... | [
{
"created": "Wed, 18 May 2011 18:24:56 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Feb 2013 18:38:00 GMT",
"version": "v2"
}
] | 2013-02-13 | [
[
"Bodendorfer",
"Norbert",
""
],
[
"Thiemann",
"Thomas",
""
],
[
"Thurn",
"Andreas",
""
]
] | Loop Quantum Gravity heavily relies on a connection formulation of General Relativity such that 1. the connection Poisson commutes with itself and 2. the corresponding gauge group is compact. This can be achieved starting from the Palatini or Holst action when imposing the time gauge. Unfortunately, this method is rest... |
1202.5708 | Brendan McMonigal | Brendan McMonigal, Geraint F. Lewis, Philip O'Byrne | The Alcubierre Warp Drive: On the Matter of Matter | null | null | 10.1103/PhysRevD.85.064024 | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Alcubierre warp drive allows a spaceship to travel at an arbitrarily
large global velocity by deforming the spacetime in a bubble around the
spaceship. Little is known about the interactions between massive particles and
the Alcubierre warp drive, or the effects of an accelerating or decelerating
warp bubble. We ... | [
{
"created": "Sun, 26 Feb 2012 00:57:15 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"McMonigal",
"Brendan",
""
],
[
"Lewis",
"Geraint F.",
""
],
[
"O'Byrne",
"Philip",
""
]
] | The Alcubierre warp drive allows a spaceship to travel at an arbitrarily large global velocity by deforming the spacetime in a bubble around the spaceship. Little is known about the interactions between massive particles and the Alcubierre warp drive, or the effects of an accelerating or decelerating warp bubble. We ex... |
gr-qc/9505022 | Karen Brewster | Lee Smolin | Cosmology as a Problem in Critical Phenomena | 52 pages, Latex File, No Figures | null | 10.1007/BFb0103573 | CGPG-95/5-2, IASSNS-95/30 | gr-qc astro-ph | null | Several problems in cosmology and astrophysics are described in which
critical phenomena of various types may play a role. These include the
organization of the disks of spiral galaxies, various aspects of the problem of
structure formation in icosmology, the problem of the selection of initial
conditions and paramet... | [
{
"created": "Tue, 16 May 1995 15:37:02 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Smolin",
"Lee",
""
]
] | Several problems in cosmology and astrophysics are described in which critical phenomena of various types may play a role. These include the organization of the disks of spiral galaxies, various aspects of the problem of structure formation in icosmology, the problem of the selection of initial conditions and parameter... |
gr-qc/9710024 | Malcolm MacCallum | M.A.H. MacCallum | Hypersurface-orthogonal generators of an orthogonally transitive
transitive $G_2I$, topological identifications, and axially and cylindrically
symmetric spacetimes | 16 pages, latex 2.09, no figures. Accepted for publication in General
Relativity and Gravitation | Gen.Rel.Grav.30:131-150,1998 | 10.1023/A:1018833219068 | null | gr-qc | null | A criterion given by Castejon-Amenedo and MacCallum (1990) for the existence
of (locally) hypersurface-orthogonal generators of an orthogonally-transitive
two-parameter Abelian group of motions (a $G_2I$) in spacetime is re-expressed
as a test for linear dependence with constant coefficients between the three
compone... | [
{
"created": "Fri, 3 Oct 1997 13:46:58 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"MacCallum",
"M. A. H.",
""
]
] | A criterion given by Castejon-Amenedo and MacCallum (1990) for the existence of (locally) hypersurface-orthogonal generators of an orthogonally-transitive two-parameter Abelian group of motions (a $G_2I$) in spacetime is re-expressed as a test for linear dependence with constant coefficients between the three component... |
1802.03577 | Kaifeng Cui | Liangsuo Shu, Kaifeng Cui, Xiaokang Liu, Zhichun Liu, Wei Liu | Surface tension of the horizon | 12 Pages, 1 figures | Fortschritte der Physik 67(3): 1800076 (2019) | 10.1002/prop.201800076 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The idea of treating the horizon of a black hole as a stretched membrane with
surface tension has a long history. In this work, we discuss the microscopic
origin of the surface tension of the horizon in quantum pictures of spaces,
which are Bose-Einstein condensates of gravitons. The horizon is a phase
interface of g... | [
{
"created": "Sat, 10 Feb 2018 12:46:22 GMT",
"version": "v1"
},
{
"created": "Sat, 5 May 2018 06:55:43 GMT",
"version": "v2"
},
{
"created": "Sun, 24 Jun 2018 14:53:40 GMT",
"version": "v3"
},
{
"created": "Fri, 25 Jan 2019 02:34:42 GMT",
"version": "v4"
}
] | 2022-03-25 | [
[
"Shu",
"Liangsuo",
""
],
[
"Cui",
"Kaifeng",
""
],
[
"Liu",
"Xiaokang",
""
],
[
"Liu",
"Zhichun",
""
],
[
"Liu",
"Wei",
""
]
] | The idea of treating the horizon of a black hole as a stretched membrane with surface tension has a long history. In this work, we discuss the microscopic origin of the surface tension of the horizon in quantum pictures of spaces, which are Bose-Einstein condensates of gravitons. The horizon is a phase interface of gra... |
2206.14787 | Dominik Szcz\c{e}\'sniak PhD | Adam Z. Kaczmarek, Dominik Szcz\c{e}\'sniak, Sabre Kais | Measurement-induced nonlocality for observers near a black hole | 4 figures | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a systematic and complementary study of quantum correlations near
a black hole by considering the measurement-induced nonlocality (MIN). The
quantum measure of interest is discussed on the same footing for the fermionic,
bosonic and mixed fermion-boson modes in relation to the Hawking radiation. The
obtain... | [
{
"created": "Wed, 29 Jun 2022 17:41:49 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Mar 2023 19:07:38 GMT",
"version": "v2"
}
] | 2023-03-13 | [
[
"Kaczmarek",
"Adam Z.",
""
],
[
"Szczȩśniak",
"Dominik",
""
],
[
"Kais",
"Sabre",
""
]
] | We present a systematic and complementary study of quantum correlations near a black hole by considering the measurement-induced nonlocality (MIN). The quantum measure of interest is discussed on the same footing for the fermionic, bosonic and mixed fermion-boson modes in relation to the Hawking radiation. The obtained... |
2304.04802 | Warren Li | Warren Li | Kasner-like description of spacelike singularities in spherically
symmetric spacetimes with scalar matter | 65 pages, 12 figures, comments welcome! | null | null | null | gr-qc math.AP math.DG | http://creativecommons.org/licenses/by/4.0/ | We study the properties of spacelike singularities in spherically symmetric
spacetimes obeying the Einstein equations, in the presence of matter. We
consider in particular matter described by a scalar field, both in the presence
of an electromagnetic field and without. We prove that if a spacelike
singularity obeying... | [
{
"created": "Mon, 10 Apr 2023 18:21:34 GMT",
"version": "v1"
}
] | 2023-04-12 | [
[
"Li",
"Warren",
""
]
] | We study the properties of spacelike singularities in spherically symmetric spacetimes obeying the Einstein equations, in the presence of matter. We consider in particular matter described by a scalar field, both in the presence of an electromagnetic field and without. We prove that if a spacelike singularity obeying s... |
1509.03698 | Francisco Frutos-Alfaro Dr. rer. nat. | Francisco Frutos-Alfaro | Approximate Kerr-like Metric with Quadrupole | null | International Journal of Astronomy and Astrophysics, 6, 334-345,
2016 | 10.4236/ijaa.2016.63028. | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new approximate metric representing the spacetime of a rotating deformed
body is obtained by perturbing the Kerr metric to include til the second order
of the quadrupole moment. It has a simple form, because is Kerr-like. Its
Taylor expansion form coincides with second order quadrupole metrics with slow
rotation al... | [
{
"created": "Sat, 12 Sep 2015 02:59:24 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Nov 2018 17:08:09 GMT",
"version": "v10"
},
{
"created": "Thu, 17 Sep 2015 01:18:37 GMT",
"version": "v2"
},
{
"created": "Thu, 8 Oct 2015 15:30:03 GMT",
"version": "v3"
},
{
"c... | 2018-11-30 | [
[
"Frutos-Alfaro",
"Francisco",
""
]
] | A new approximate metric representing the spacetime of a rotating deformed body is obtained by perturbing the Kerr metric to include til the second order of the quadrupole moment. It has a simple form, because is Kerr-like. Its Taylor expansion form coincides with second order quadrupole metrics with slow rotation alre... |
0907.5104 | Carlos A. R. Herdeiro | Carlos A. R. Herdeiro, Carmen Rebelo and Claude M. Warnick | On the backreaction of frame dragging | 18 pages, 8 figures | null | 10.1103/PhysRevD.80.084037 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The backreaction on black holes due to dragging heavy, rather than test,
objects is discussed. As a case study, a regular black Saturn system where the
central black hole has vanishing intrinsic angular momentum, J^{BH}=0, is
considered. It is shown that there is a correlation between the sign of two
response functio... | [
{
"created": "Wed, 29 Jul 2009 10:58:45 GMT",
"version": "v1"
}
] | 2013-05-29 | [
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Rebelo",
"Carmen",
""
],
[
"Warnick",
"Claude M.",
""
]
] | The backreaction on black holes due to dragging heavy, rather than test, objects is discussed. As a case study, a regular black Saturn system where the central black hole has vanishing intrinsic angular momentum, J^{BH}=0, is considered. It is shown that there is a correlation between the sign of two response functions... |
2008.00659 | Josef Kluson | J. Kluson, B. Matous | Covariant Hamiltonian Formalism for F(R)-Gravity | 12 pages,v2:references added | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this short note we perform covariant Hamiltonian analysis of F(R)-gravity.
| [
{
"created": "Mon, 3 Aug 2020 05:59:47 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Aug 2020 07:24:36 GMT",
"version": "v2"
}
] | 2020-08-19 | [
[
"Kluson",
"J.",
""
],
[
"Matous",
"B.",
""
]
] | In this short note we perform covariant Hamiltonian analysis of F(R)-gravity. |
1606.01509 | Christian R\"oken | Felix Finster and Christian R\"oken | An Integral Spectral Representation of the Massive Dirac Propagator in
the Kerr Geometry in Eddington-Finkelstein-type Coordinates | 31 pages, 1 figure, details added, references added, minor
corrections | Adv.Theor.Math.Phys. 22 (2018) 47-92 | 10.4310/ATMP.2018.v22.n1.a3 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the massive Dirac equation in the non-extreme Kerr geometry in
horizon-penetrating advanced Eddington-Finkelstein-type coordinates and derive
a functional analytic integral representation of the associated propagator
using the spectral theorem for unbounded self-adjoint operators, Stone's
formula, and qua... | [
{
"created": "Sun, 5 Jun 2016 13:50:35 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Nov 2017 12:00:28 GMT",
"version": "v2"
},
{
"created": "Fri, 31 Aug 2018 10:41:35 GMT",
"version": "v3"
}
] | 2020-08-13 | [
[
"Finster",
"Felix",
""
],
[
"Röken",
"Christian",
""
]
] | We consider the massive Dirac equation in the non-extreme Kerr geometry in horizon-penetrating advanced Eddington-Finkelstein-type coordinates and derive a functional analytic integral representation of the associated propagator using the spectral theorem for unbounded self-adjoint operators, Stone's formula, and quant... |
2311.16934 | Andrea Pierfrancesco Sanna | Mariano Cadoni, Mauro Oi, Mirko Pitzalis, Andrea P. Sanna | Scalar stars and lumps with (A)dS core | 26 pages, 5 figures, 1 appendix | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We explore the possibility of embedding regular compact objects with (anti)
de Sitter ((A)dS) core as solutions of Einstein's gravity minimally coupled to
a real scalar field. We consider, among others, solutions interpolating between
an inner, potential-dominated core and an outer, kinetic-term-dominated region.
Owi... | [
{
"created": "Tue, 28 Nov 2023 16:34:57 GMT",
"version": "v1"
}
] | 2023-11-29 | [
[
"Cadoni",
"Mariano",
""
],
[
"Oi",
"Mauro",
""
],
[
"Pitzalis",
"Mirko",
""
],
[
"Sanna",
"Andrea P.",
""
]
] | We explore the possibility of embedding regular compact objects with (anti) de Sitter ((A)dS) core as solutions of Einstein's gravity minimally coupled to a real scalar field. We consider, among others, solutions interpolating between an inner, potential-dominated core and an outer, kinetic-term-dominated region. Owing... |
0804.1007 | Alicia M. Sintes | Llucia Sancho de la Jordana and Alicia M. Sintes | A $\chi^2$ veto for continuous gravitational wave searches | Final version, 12th Gravitational Waves Data Analysis Workshop | Class.Quant.Grav.25:184014,2008 | 10.1088/0264-9381/25/18/184014 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | $\chi^2$ vetoes are commonly used in searching for gravitational waves, in
particular for broad-band signals, but they can also be applied to narrow-band
continuous wave signals, such as those expected from rapidly rotating neutron
stars. In this paper we present a $\chi^2$ veto adapted to the Hough transform
searche... | [
{
"created": "Mon, 7 Apr 2008 11:19:24 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Feb 2009 14:50:49 GMT",
"version": "v2"
}
] | 2009-03-09 | [
[
"de la Jordana",
"Llucia Sancho",
""
],
[
"Sintes",
"Alicia M.",
""
]
] | $\chi^2$ vetoes are commonly used in searching for gravitational waves, in particular for broad-band signals, but they can also be applied to narrow-band continuous wave signals, such as those expected from rapidly rotating neutron stars. In this paper we present a $\chi^2$ veto adapted to the Hough transform searches ... |
1504.02686 | Ott Vilson | Laur Jarv, Piret Kuusk, Margus Saal and Ott Vilson | Transformation properties and general relativity regime in scalar-tensor
theories | 34 pages, some references added and updated, a few sentences
clarified | Class. Quantum Grav. 32, 235013 (2015) | 10.1088/0264-9381/32/23/235013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider first generation scalar-tensor theories of gravitation in a
completely generic form, keeping the transformation functions of the local
rescaling of the metric and the scalar field redefinition explicitly distinct
from the coupling functions in the action. It is well known that in the Jordan
frame Brans-Di... | [
{
"created": "Fri, 10 Apr 2015 14:12:42 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Nov 2015 12:42:46 GMT",
"version": "v2"
}
] | 2015-11-16 | [
[
"Jarv",
"Laur",
""
],
[
"Kuusk",
"Piret",
""
],
[
"Saal",
"Margus",
""
],
[
"Vilson",
"Ott",
""
]
] | We consider first generation scalar-tensor theories of gravitation in a completely generic form, keeping the transformation functions of the local rescaling of the metric and the scalar field redefinition explicitly distinct from the coupling functions in the action. It is well known that in the Jordan frame Brans-Dick... |
2105.06257 | Joao Ider Silva Junior | Jo\~ao Ider | Evolution of matter fields in black holes with Lifshitz symmetry | Master dissertation (in Portuguese), Advisor: Prof. Dr. Alan Pavan,
117 pages, 37 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work the evolution of two fields of matter in planar symmetric black
holes D-dimensional with symmetry of Lifshitz whose dynamic exponent is $z$
were analyzed. The fields investigated were a scalar field non-minimal coupled
to the Einstein tensor and the Ricci scalar and the electromagnetic field. Two
black h... | [
{
"created": "Tue, 11 May 2021 16:38:52 GMT",
"version": "v1"
}
] | 2021-05-14 | [
[
"Ider",
"João",
""
]
] | In this work the evolution of two fields of matter in planar symmetric black holes D-dimensional with symmetry of Lifshitz whose dynamic exponent is $z$ were analyzed. The fields investigated were a scalar field non-minimal coupled to the Einstein tensor and the Ricci scalar and the electromagnetic field. Two black hol... |
gr-qc/0205004 | David Langlois | David Langlois (IAP, Paris) | Gravitational and cosmological properties of a brane-universe | Review talk, Journees relativistes, Dublin (2001); 4 pages; Latex
(with ws-ijmpa.cls); no figure | Int.J.Mod.Phys. A17 (2002) 2701-2706 | 10.1142/S0217751X02011631 | null | gr-qc astro-ph hep-ph hep-th | null | The aim of this contribution is to provide a short introduction to recently
investigated models in which our accessible universe is a four-dimensional
submanifold, or brane, embedded in a higher dimensional spacetime and ordinary
matter is trapped in the brane. I focus here on the gravitational and
cosmological aspec... | [
{
"created": "Wed, 1 May 2002 16:25:24 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Langlois",
"David",
"",
"IAP, Paris"
]
] | The aim of this contribution is to provide a short introduction to recently investigated models in which our accessible universe is a four-dimensional submanifold, or brane, embedded in a higher dimensional spacetime and ordinary matter is trapped in the brane. I focus here on the gravitational and cosmological aspects... |
0706.2736 | Nikolai V. Mitskievich | N.V. Mitskievich, V.N. Efremov, and A.M. Hern\'andez Magdaleno | Topological gravitation on graph manifolds | 3 pages, a talk delivered at the 11th Marcel Grossmann Meeting (2006) | null | 10.1142/9789812834300_0265 | null | gr-qc | null | A model of topological field theory is presented in which the vacuum coupling
constants are topological invariants of the four-dimensional spacetime. Thus
the coupling constants are theoretically computable, and they indicate the
topological structure of our universe.
| [
{
"created": "Tue, 19 Jun 2007 08:55:58 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Mitskievich",
"N. V.",
""
],
[
"Efremov",
"V. N.",
""
],
[
"Magdaleno",
"A. M. Hernández",
""
]
] | A model of topological field theory is presented in which the vacuum coupling constants are topological invariants of the four-dimensional spacetime. Thus the coupling constants are theoretically computable, and they indicate the topological structure of our universe. |
1209.6533 | Thomas Dent | The LIGO Scientific Collaboration and the Virgo Collaboration: J.
Aasi, J. Abadie, B. P. Abbott, R. Abbott, T. D. Abbott, M. Abernathy, T.
Accadia, F. Acernese, C. Adams, T. Adams, P. Addesso, R. Adhikari, C.
Affeldt, M. Agathos, K. Agatsuma, P. Ajith, B. Allen, A. Allocca, E. Amador
Ceron, D. Amariutei, S. B. ... | Search for Gravitational Waves from Binary Black Hole Inspiral, Merger
and Ringdown in LIGO-Virgo Data from 2009-2010 | 15 pages PDFLaTeX, minor changes to correspond with published
version. An archived version with data for plots and tables is at
https://dcc.ligo.org/cgi-bin/DocDB/ShowDocument?docid=p1200024 . A Science
Summary of the paper for education and public outreach is at
http://www.ligo.org/science/Publication-S6CBCHM/... | Phys. Rev. D 87, 022002 (2013) | 10.1103/PhysRevD.87.022002 | LIGO-P1200024 | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We report a search for gravitational waves from the inspiral, merger and
ringdown of binary black holes (BBH) with total mass between 25 and 100 solar
masses, in data taken at the LIGO and Virgo observatories between July 7, 2009
and October 20, 2010. The maximum sensitive distance of the detectors over this
period f... | [
{
"created": "Fri, 28 Sep 2012 14:26:12 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Oct 2012 19:45:02 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Feb 2013 11:11:33 GMT",
"version": "v3"
}
] | 2013-02-26 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"Aasi",
"J.",
""
],
[
"Abadie",
"J.",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""... | We report a search for gravitational waves from the inspiral, merger and ringdown of binary black holes (BBH) with total mass between 25 and 100 solar masses, in data taken at the LIGO and Virgo observatories between July 7, 2009 and October 20, 2010. The maximum sensitive distance of the detectors over this period for... |
2005.08313 | Francesco Bajardi | Francesco Bajardi and Salvatore Capozziello | f(G) Noether cosmology | null | European Physic Journal C 80 (2020) no.8, 704 | 10.1140/epjc/s10052-020-8258-2 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop the $n$-dimensional cosmology for $f(\mathcal{G})$ gravity, where
$\mathcal{G}$ is the \emph{Gauss-Bonnet} topological invariant. Specifically,
by the so-called Noether Symmetry Approach, we select $f(\mathcal{G})\simeq
\mathcal{G}^k$ power-law models where $k$ is a real number. In particular, the
case $k ... | [
{
"created": "Sun, 17 May 2020 17:26:17 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Jul 2020 19:38:31 GMT",
"version": "v2"
}
] | 2021-11-29 | [
[
"Bajardi",
"Francesco",
""
],
[
"Capozziello",
"Salvatore",
""
]
] | We develop the $n$-dimensional cosmology for $f(\mathcal{G})$ gravity, where $\mathcal{G}$ is the \emph{Gauss-Bonnet} topological invariant. Specifically, by the so-called Noether Symmetry Approach, we select $f(\mathcal{G})\simeq \mathcal{G}^k$ power-law models where $k$ is a real number. In particular, the case $k = ... |
1205.7088 | Tomohiro Harada | Tomohiro Harada, Hiroya Nemoto, Umpei Miyamoto | Upper limits of particle emission from high-energy collision and
reaction near a maximally rotating Kerr black hole | 22 pages, 3 figures, typos corrected, reference updated, accepted for
publication in Physical Review D, typos corrected | Phys.Rev.D86:024027,2012 | 10.1103/PhysRevD.86.024027 | RUP-12-4 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The center-of-mass energy of two particles colliding near the horizon of a
maximally rotating black hole can be arbitrarily high if the angular momentum
of either of the incident particles is fine-tuned, which we call a critical
particle. We study particle emission from such high-energy collision and
reaction in the ... | [
{
"created": "Thu, 31 May 2012 19:46:12 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Jun 2012 17:07:36 GMT",
"version": "v2"
},
{
"created": "Sat, 14 Jul 2012 01:52:09 GMT",
"version": "v3"
},
{
"created": "Fri, 7 Sep 2012 12:58:06 GMT",
"version": "v4"
}
] | 2015-06-05 | [
[
"Harada",
"Tomohiro",
""
],
[
"Nemoto",
"Hiroya",
""
],
[
"Miyamoto",
"Umpei",
""
]
] | The center-of-mass energy of two particles colliding near the horizon of a maximally rotating black hole can be arbitrarily high if the angular momentum of either of the incident particles is fine-tuned, which we call a critical particle. We study particle emission from such high-energy collision and reaction in the eq... |
gr-qc/9305014 | H. Shinkai | Hisa-aki SHINKAI and Kei-ichi MAEDA | Can Gravitational Waves Prevent Inflation? | LaTeX, 11 pages, 3 figures are available on request <To
62L508@jpnwas00.bitnet (Hisa-aki SHINKAI)>, WU-AP/29/93 | Phys.Rev.D48:3910-3913,1993 | 10.1103/PhysRevD.48.3910 | null | gr-qc | null | To investigate the cosmic no hair conjecture, we analyze numerically
1-dimensional plane symmetrical inhomogeneities due to gravitational waves in
vacuum spacetimes with a positive cosmological constant. Assuming periodic
gravitational pulse waves initially, we study the time evolution of those waves
and the nature o... | [
{
"created": "Tue, 18 May 1993 12:29:58 GMT",
"version": "v1"
}
] | 2010-11-01 | [
[
"SHINKAI",
"Hisa-aki",
""
],
[
"MAEDA",
"Kei-ichi",
""
]
] | To investigate the cosmic no hair conjecture, we analyze numerically 1-dimensional plane symmetrical inhomogeneities due to gravitational waves in vacuum spacetimes with a positive cosmological constant. Assuming periodic gravitational pulse waves initially, we study the time evolution of those waves and the nature of ... |
2305.10715 | Cosimo Bambi | Cosimo Bambi | X-Ray Tests of General Relativity with Black Holes | 16 pages, 5 figures. Invited contribution for the Special Issue "Role
of Black Holes in Testing Modified Theories of Gravity" for Symmetry (Ed.
Rahul Kumar Walia). v2: refereed version | Symmetry 15: 1277 (2023) | 10.3390/sym15061277 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General relativity is one of the pillars of modern physics. For decades, the
theory has been mainly tested in the weak field regime with experiments in the
Solar System and radio observations of binary pulsars. Until 2015, the strong
field regime was almost completely unexplored. Thanks to new observational
facilitie... | [
{
"created": "Thu, 18 May 2023 05:26:30 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Jun 2023 08:54:15 GMT",
"version": "v2"
}
] | 2023-06-21 | [
[
"Bambi",
"Cosimo",
""
]
] | General relativity is one of the pillars of modern physics. For decades, the theory has been mainly tested in the weak field regime with experiments in the Solar System and radio observations of binary pulsars. Until 2015, the strong field regime was almost completely unexplored. Thanks to new observational facilities,... |
1703.08503 | Jonathan Richardson | Aaron Chou, Henry Glass, H. Richard Gustafson, Craig J. Hogan,
Brittany L. Kamai, Ohkyung Kwon, Robert Lanza, Lee McCuller, Stephan S.
Meyer, Jonathan W. Richardson, Chris Stoughton, Ray Tomlin, and Rainer Weiss | Interferometric Constraints on Quantum Geometrical Shear Noise
Correlations | Matches the journal accepted version | Class. Quantum Grav. 34 165005 (2017) | 10.1088/1361-6382/aa7bd3 | FERMILAB-PUB-16-527 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Final measurements and analysis are reported from the first-generation
Holometer, the first instrument capable of measuring correlated variations in
space-time position at strain noise power spectral densities smaller than a
Planck time. The apparatus consists of two co-located, but independent and
isolated, 40 m pow... | [
{
"created": "Fri, 24 Mar 2017 16:54:26 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Aug 2017 20:41:56 GMT",
"version": "v2"
}
] | 2017-08-15 | [
[
"Chou",
"Aaron",
""
],
[
"Glass",
"Henry",
""
],
[
"Gustafson",
"H. Richard",
""
],
[
"Hogan",
"Craig J.",
""
],
[
"Kamai",
"Brittany L.",
""
],
[
"Kwon",
"Ohkyung",
""
],
[
"Lanza",
"Robert",
""
],
[
... | Final measurements and analysis are reported from the first-generation Holometer, the first instrument capable of measuring correlated variations in space-time position at strain noise power spectral densities smaller than a Planck time. The apparatus consists of two co-located, but independent and isolated, 40 m power... |
2005.03413 | Reinoud Slagter | Reinoud Jan Slagter | On the dynamical 4D BTZ black hole solution in conformally invariant
gravity | Version V4; some minor correction. 3 more figures added. Comment very
welcome! 26 figures. 16 pages | null | 10.4236/jmp.2020.1110105 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review the (2+1)-dimensional Ba\u{n}ados-Teitelboim-Zanelli black hole
solution in conformally invariant gravity, uplifted to (3+1)-dimensional
spacetime. As matter content we use a scalar-gauge field. The metric is written
as $g_{\mu\nu}=\omega^2\tilde g_{\mu\nu}$, where the {\it dilaton field}
$\omega$ contains ... | [
{
"created": "Thu, 7 May 2020 12:25:40 GMT",
"version": "v1"
},
{
"created": "Wed, 13 May 2020 21:29:15 GMT",
"version": "v2"
},
{
"created": "Tue, 26 May 2020 20:30:53 GMT",
"version": "v3"
},
{
"created": "Wed, 17 Jun 2020 19:09:25 GMT",
"version": "v4"
}
] | 2020-12-02 | [
[
"Slagter",
"Reinoud Jan",
""
]
] | We review the (2+1)-dimensional Ba\u{n}ados-Teitelboim-Zanelli black hole solution in conformally invariant gravity, uplifted to (3+1)-dimensional spacetime. As matter content we use a scalar-gauge field. The metric is written as $g_{\mu\nu}=\omega^2\tilde g_{\mu\nu}$, where the {\it dilaton field} $\omega$ contains al... |
1604.06537 | Sujoy Modak | Daniel Bedingham, Sujoy K. Modak and Daniel Sudarsky | Relativistic collapse dynamics and black hole information loss | 39 pages, 3 figures | Phys. Rev. D 94, 045009 (2016) | 10.1103/PhysRevD.94.045009 | KEK-TH-1897 | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a proposal for the resolution of the black hole information puzzle
within the context of modified versions of quantum theory involving spontaneous
reduction of the quantum state. The theories of this kind, which were developed
in order to address the so called "measurement problem" in quantum theory have,
in... | [
{
"created": "Fri, 22 Apr 2016 05:12:23 GMT",
"version": "v1"
}
] | 2016-08-17 | [
[
"Bedingham",
"Daniel",
""
],
[
"Modak",
"Sujoy K.",
""
],
[
"Sudarsky",
"Daniel",
""
]
] | We study a proposal for the resolution of the black hole information puzzle within the context of modified versions of quantum theory involving spontaneous reduction of the quantum state. The theories of this kind, which were developed in order to address the so called "measurement problem" in quantum theory have, in t... |
gr-qc/9506018 | Takashi Torii | Takashi Torii, Kei-ichi Maeda and Takashi Tachizawa | Cosmic Colored Black Holes | 12 pages, latex, 4 figures (available upon request) | Phys.Rev.D52:4272-4276,1995 | 10.1103/PhysRevD.52.R4272 | WU-AP/44/95 | gr-qc | null | We present spherically symmetric static solutions (a particle-like solution
and a black hole solution) in the Einstein-Yang-Mills system with a
cosmological constant.Although their gravitational structures are locally
similar to those of the Bartnik-McKinnon particles or the colored black holes,
the asymptotic behavi... | [
{
"created": "Thu, 8 Jun 1995 01:44:23 GMT",
"version": "v1"
}
] | 2010-01-08 | [
[
"Torii",
"Takashi",
""
],
[
"Maeda",
"Kei-ichi",
""
],
[
"Tachizawa",
"Takashi",
""
]
] | We present spherically symmetric static solutions (a particle-like solution and a black hole solution) in the Einstein-Yang-Mills system with a cosmological constant.Although their gravitational structures are locally similar to those of the Bartnik-McKinnon particles or the colored black holes, the asymptotic behavior... |
2211.03544 | Amit Das | N. Rahman, M. Kalam, A. Das, S. Islam, F. Rahaman, M. Murshid | Thin-shell wormhole under non-commutative geometry inspired
Einstein-Gauss-Bonnet gravity | 17 pages, 11 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Einstein-Gauss-Bonnet gravity is a generalization of the general relativity
to higher dimensions in which the first and second-order terms correspond to
general relativity and Einstein-Gauss-Bonnet gravity respectively. We construct
a new class of five-dimensional (5D) thin-shell wormholes by the `Cut-Paste'
techniqu... | [
{
"created": "Fri, 4 Nov 2022 04:22:37 GMT",
"version": "v1"
}
] | 2022-11-08 | [
[
"Rahman",
"N.",
""
],
[
"Kalam",
"M.",
""
],
[
"Das",
"A.",
""
],
[
"Islam",
"S.",
""
],
[
"Rahaman",
"F.",
""
],
[
"Murshid",
"M.",
""
]
] | Einstein-Gauss-Bonnet gravity is a generalization of the general relativity to higher dimensions in which the first and second-order terms correspond to general relativity and Einstein-Gauss-Bonnet gravity respectively. We construct a new class of five-dimensional (5D) thin-shell wormholes by the `Cut-Paste' technique ... |
gr-qc/0202035 | Piotr Jaranowski | Piotr Jaranowski and Gerhard Sch\"afer | Lapse function for maximally sliced Brill-Lindquist initial data | REVTeX, 4 pages, accepted for publication in Phys. Rev. D (ver. 2:
some more details added) | Phys.Rev.D65:127501,2002 | 10.1103/PhysRevD.65.127501 | null | gr-qc | null | For binary black holes the lapse function corresponding to the
Brill-Lindquist initial value solution for uncharged black holes is given in
analytic form under the maximal slicing condition. In the limiting case of very
small ratio of mass to separation between the black holes the surface defined
by the zero value of... | [
{
"created": "Mon, 11 Feb 2002 14:23:57 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Apr 2002 11:21:57 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Jaranowski",
"Piotr",
""
],
[
"Schäfer",
"Gerhard",
""
]
] | For binary black holes the lapse function corresponding to the Brill-Lindquist initial value solution for uncharged black holes is given in analytic form under the maximal slicing condition. In the limiting case of very small ratio of mass to separation between the black holes the surface defined by the zero value of t... |
1903.01840 | Claes Uggla | Claes Uggla and John Wainwright | Second order cosmological perturbations: new conserved quantities and
the general solution at super-horizon scale | 24 pages | Phys. Rev. D 100, 023544 (2019) | 10.1103/PhysRevD.100.023544 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The study of long wavelength scalar perturbations, in particular the
existence of conserved quantities when the perturbations are adiabatic, plays
an important role in e.g. inflationary cosmology. In this paper we present some
new conserved quantities at second order and relate them to the curvature
perturbation in t... | [
{
"created": "Tue, 5 Mar 2019 14:22:46 GMT",
"version": "v1"
}
] | 2019-08-07 | [
[
"Uggla",
"Claes",
""
],
[
"Wainwright",
"John",
""
]
] | The study of long wavelength scalar perturbations, in particular the existence of conserved quantities when the perturbations are adiabatic, plays an important role in e.g. inflationary cosmology. In this paper we present some new conserved quantities at second order and relate them to the curvature perturbation in the... |
gr-qc/9304025 | null | Arlen Anderson and Jonathan J. Halliwell | An Information-Theoretic Measure of Uncertainty due to Quantum and
Thermal Fluctuations | 36 pages (revised uncorrupted version), Report IC 92-93/25 | Phys.Rev. D48 (1993) 2753-2765 | 10.1103/PhysRevD.48.2753 | null | gr-qc cond-mat hep-th | null | We study an information-theoretic measure of uncertainty for quantum systems.
It is the Shannon information $I$ of the phase space probability distribution
$\la z | \rho | z \ra $, where $|z \ra $ are coherent states, and $\rho$ is the
density matrix. The uncertainty principle is expressed in this measure as $I
\ge 1... | [
{
"created": "Sun, 18 Apr 1993 13:32:00 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Apr 1993 10:52:00 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Apr 1993 10:48:54 GMT",
"version": "v3"
}
] | 2009-10-22 | [
[
"Anderson",
"Arlen",
""
],
[
"Halliwell",
"Jonathan J.",
""
]
] | We study an information-theoretic measure of uncertainty for quantum systems. It is the Shannon information $I$ of the phase space probability distribution $\la z | \rho | z \ra $, where $|z \ra $ are coherent states, and $\rho$ is the density matrix. The uncertainty principle is expressed in this measure as $I \ge 1$.... |
gr-qc/0208036 | Jose Geraldo Pereira | J.G. Pereira and T. Vargas | Regge Calculus in Teleparallel Gravity | Latex, 10 pages, 2 eps figures, to appear in Class. Quant. Grav | Class.Quant.Grav. 19 (2002) 4807-4816 | 10.1088/0264-9381/19/19/301 | null | gr-qc | null | In the context of the teleparallel equivalent of general relativity, the
Weitzenbock manifold is considered as the limit of a suitable sequence of
discrete lattices composed of an increasing number of smaller an smaller
simplices, where the interior of each simplex (Delaunay lattice) is assumed to
be flat. The link l... | [
{
"created": "Wed, 14 Aug 2002 12:48:40 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Pereira",
"J. G.",
""
],
[
"Vargas",
"T.",
""
]
] | In the context of the teleparallel equivalent of general relativity, the Weitzenbock manifold is considered as the limit of a suitable sequence of discrete lattices composed of an increasing number of smaller an smaller simplices, where the interior of each simplex (Delaunay lattice) is assumed to be flat. The link len... |
1905.09260 | Francesco Salemi | F. Salemi, E. Milotti, G. A. Prodi, G. Vedovato, C. Lazzaro, S.
Tiwari, S. Vinciguerra, M. Drago and S. Klimenko | A wider look at the gravitational-wave transients from GWTC-1 using an
unmodeled reconstruction method | 13 pages, 7 figures and 3 tables | Phys. Rev. D 100, 042003 (2019) | 10.1103/PhysRevD.100.042003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the morphology of the events from the GWTC-1
catalog of compact binary coalescences as reconstructed by a method based on
coherent excess power: we use an open-source version of the coherent WaveBurst
(cWB) analysis pipeline, which does not make use of waveform models. The
coherent respo... | [
{
"created": "Wed, 22 May 2019 17:43:03 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Jun 2019 16:28:02 GMT",
"version": "v2"
}
] | 2019-09-04 | [
[
"Salemi",
"F.",
""
],
[
"Milotti",
"E.",
""
],
[
"Prodi",
"G. A.",
""
],
[
"Vedovato",
"G.",
""
],
[
"Lazzaro",
"C.",
""
],
[
"Tiwari",
"S.",
""
],
[
"Vinciguerra",
"S.",
""
],
[
"Drago",
"M.",
... | In this paper, we investigate the morphology of the events from the GWTC-1 catalog of compact binary coalescences as reconstructed by a method based on coherent excess power: we use an open-source version of the coherent WaveBurst (cWB) analysis pipeline, which does not make use of waveform models. The coherent respons... |
2311.13138 | Behzad Eslam Panah | A. Bagheri Tudeshki, G. H. Bordbar, and B. Eslam Panah | Effect of rainbow function on the structural properties of dark energy
star | 12 pages, 8 figures, 4 tables | Phys. Lett. B 848 (2024) 138333 | 10.1016/j.physletb.2023.138333 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Confirming the existence of compact objects with a mass greater than
$2.5M_{\odot}$ by observational results such as GW190814 makes that is possible
to provide theories to justify these observational results using modified
gravity. This motivates us to use gravity's rainbow, which is the appropriate
case for dense ob... | [
{
"created": "Wed, 22 Nov 2023 03:55:53 GMT",
"version": "v1"
}
] | 2023-11-23 | [
[
"Tudeshki",
"A. Bagheri",
""
],
[
"Bordbar",
"G. H.",
""
],
[
"Panah",
"B. Eslam",
""
]
] | Confirming the existence of compact objects with a mass greater than $2.5M_{\odot}$ by observational results such as GW190814 makes that is possible to provide theories to justify these observational results using modified gravity. This motivates us to use gravity's rainbow, which is the appropriate case for dense obje... |
1910.13897 | Antonio Gallerati | Giovanni Alberto Ummarino, Antonio Gallerati | Exploiting weak field gravity-Maxwell symmetry in superconductive
fluctuations regime | 14 pages, 3 figures | Symmetry 11 (2019) 11, 1341 | 10.3390/sym11111341 | null | gr-qc cond-mat.supr-con hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the behaviour of a superconductor in a weak static gravitational
field for temperatures slightly greater than its transition temperature
(fluctuation regime). Making use of the time-dependent Ginzburg-Landau
equations, we find a possible short time alteration of the static gravitational
field in the vicinity... | [
{
"created": "Wed, 30 Oct 2019 14:40:10 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Nov 2019 16:40:37 GMT",
"version": "v2"
},
{
"created": "Mon, 25 Nov 2019 15:09:15 GMT",
"version": "v3"
},
{
"created": "Thu, 28 Nov 2019 14:12:26 GMT",
"version": "v4"
},
{
"c... | 2021-05-19 | [
[
"Ummarino",
"Giovanni Alberto",
""
],
[
"Gallerati",
"Antonio",
""
]
] | We study the behaviour of a superconductor in a weak static gravitational field for temperatures slightly greater than its transition temperature (fluctuation regime). Making use of the time-dependent Ginzburg-Landau equations, we find a possible short time alteration of the static gravitational field in the vicinity o... |
2306.03676 | Jose Wadih Maluf Dr. | J. W. Maluf, F. L. Carneiro, S. C. Ulhoa and J. F. da Rocha-Neto | Tetrad Fields, Reference Frames, and the Gravitational Energy-Momentum
in the Teleparallel Equivalent of General Relativity | 66 pages, 5 figures. Published in the Annalen der Physik. In this
version, we have only fixed some typos and made linguistic corrections.
Several paragraphs and comments were added to the published article, but are
not displayed here due to copyright restrictions | Ann. Phys. (Berlin) 2023, 2300241 | 10.1002/andp.202300241 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We review the concept and definitions of the energy-momentum and angular
momentum of the gravitational field in the teleparallel equivalent of general
relativity (TEGR). The importance of these definitions is justified by three
major reasons. First, the TEGR is a well established and widely accepted
formulation of th... | [
{
"created": "Tue, 6 Jun 2023 13:40:37 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Nov 2023 13:40:45 GMT",
"version": "v2"
}
] | 2023-11-22 | [
[
"Maluf",
"J. W.",
""
],
[
"Carneiro",
"F. L.",
""
],
[
"Ulhoa",
"S. C.",
""
],
[
"da Rocha-Neto",
"J. F.",
""
]
] | We review the concept and definitions of the energy-momentum and angular momentum of the gravitational field in the teleparallel equivalent of general relativity (TEGR). The importance of these definitions is justified by three major reasons. First, the TEGR is a well established and widely accepted formulation of the ... |
2001.04978 | Vesselin G. Gueorguiev | Andre Maeder and Vesselin G. Gueorguiev | Scale-Invariant Dynamics of Galaxies, MOND, Dark Matter, and the Dwarf
Spheroidals | 12 pages, 3 figures | null | 10.1093/mnras/stz3613 | null | gr-qc astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Scale-Invariant Vacuum (SIV) theory is based on Weyl's Integrable
Geometry, endowed with a gauge scalar field. The main difference between MOND
and the SIV theory is that the first considers a global dilatation invariance
of space and time, where the scale factor $\lambda$ is a constant, while the
second opens th... | [
{
"created": "Tue, 14 Jan 2020 07:19:59 GMT",
"version": "v1"
}
] | 2020-01-16 | [
[
"Maeder",
"Andre",
""
],
[
"Gueorguiev",
"Vesselin G.",
""
]
] | The Scale-Invariant Vacuum (SIV) theory is based on Weyl's Integrable Geometry, endowed with a gauge scalar field. The main difference between MOND and the SIV theory is that the first considers a global dilatation invariance of space and time, where the scale factor $\lambda$ is a constant, while the second opens the ... |
1006.1863 | Paolo Pani | Paolo Pani, Enrico Barausse, Emanuele Berti, Vitor Cardoso | Gravitational instabilities of superspinars | 15 pages, 9 figures, 1 table. v2: Fig. 8 and Section I improved. v3:
minor changes to match the published version | Phys.Rev.D82:044009,2010 | 10.1103/PhysRevD.82.044009 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Superspinars are ultracompact objects whose mass M and angular momentum J
violate the Kerr bound (cJ/GM^2>1). Recent studies analyzed the observable
consequences of gravitational lensing and accretion around superspinars in
astrophysical scenarios. In this paper we investigate the dynamical stability
of superspinars ... | [
{
"created": "Wed, 9 Jun 2010 17:36:18 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jul 2010 06:59:31 GMT",
"version": "v2"
},
{
"created": "Mon, 9 Aug 2010 11:55:23 GMT",
"version": "v3"
}
] | 2014-11-21 | [
[
"Pani",
"Paolo",
""
],
[
"Barausse",
"Enrico",
""
],
[
"Berti",
"Emanuele",
""
],
[
"Cardoso",
"Vitor",
""
]
] | Superspinars are ultracompact objects whose mass M and angular momentum J violate the Kerr bound (cJ/GM^2>1). Recent studies analyzed the observable consequences of gravitational lensing and accretion around superspinars in astrophysical scenarios. In this paper we investigate the dynamical stability of superspinars to... |
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