id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1201.3660 | Daniele Malafarina | Pankaj S. Joshi and Daniele Malafarina | Recent developments in gravitational collapse and spacetime
singularities | 89 pages, 12 figures, Invited review article for Int Jour of Mod Phys
D | Int. J. Mod. Phys. D, 20 2641 (2011) | 10.1142/S0218271811020792 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is now known that when a massive star collapses under the force of its own
gravity, the final fate of such a continual gravitational collapse will be
either a black hole or a naked singularity under a wide variety of physically
reasonable circumstances within the framework of general theory of relativity.
The rese... | [
{
"created": "Tue, 17 Jan 2012 22:41:01 GMT",
"version": "v1"
}
] | 2012-04-20 | [
[
"Joshi",
"Pankaj S.",
""
],
[
"Malafarina",
"Daniele",
""
]
] | It is now known that when a massive star collapses under the force of its own gravity, the final fate of such a continual gravitational collapse will be either a black hole or a naked singularity under a wide variety of physically reasonable circumstances within the framework of general theory of relativity. The resear... |
0910.2820 | Sangheon Yun | Sangheon Yun | Toroidal AdS Charged Branes and Toda Equations | The contents are incomplete | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-sa/3.0/ | In this note, we consider the equations of motion for charged branes in AdS
space and show that they can be cast into one-dimensional coupled Toda type.
Then we solve the equations of motion to construct static charged AdS brane
solutions which are invariant under translation along $p$ directions and have
toroidal sy... | [
{
"created": "Thu, 15 Oct 2009 09:30:12 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Sep 2020 04:15:36 GMT",
"version": "v2"
}
] | 2020-09-08 | [
[
"Yun",
"Sangheon",
""
]
] | In this note, we consider the equations of motion for charged branes in AdS space and show that they can be cast into one-dimensional coupled Toda type. Then we solve the equations of motion to construct static charged AdS brane solutions which are invariant under translation along $p$ directions and have toroidal symm... |
1503.07312 | Manfred Requardt | Manfred Requardt | About the Incompleteness of the Semiclassical Picture in the
BH-Information Paradox and the Quantum Hair emerging from the Coupling of
Quantum Matter and Quantum Space-Time Degrees of Freedom | 21 pages PDFLatex, Sections and References added, More Details about
Coupling of Quantum Matter and Quantum Space Time Degrees of Freedom, Zero
Energy Universe, Existence of Quantum Hair | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that the semiclassical analysis of the black hole information
paradox is incomplete and has to be completed by an explicit entanglement of
matter and quantum gravity degrees of freedom. We study in detail the
evaporation process from beginning to end in the light of our extension and
show that a pure initial... | [
{
"created": "Wed, 25 Mar 2015 09:31:32 GMT",
"version": "v1"
},
{
"created": "Sun, 31 Jul 2022 14:22:42 GMT",
"version": "v2"
}
] | 2022-08-02 | [
[
"Requardt",
"Manfred",
""
]
] | We argue that the semiclassical analysis of the black hole information paradox is incomplete and has to be completed by an explicit entanglement of matter and quantum gravity degrees of freedom. We study in detail the evaporation process from beginning to end in the light of our extension and show that a pure initial s... |
1812.05646 | Pratik Wagle | Pratik Wagle, Nicolas Yunes, David Garfinkle and Lydia Bieri | Hair loss in parity violating gravity | 10 pages and 2 figures. Published in Classical and Quantum Gravity | 2019 Class. Quantum Grav. 36 115004 | 10.1088/1361-6382/ab0eed | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent detection of gravitational waves by the LIGO/VIRGO collaboration
has allowed for the first tests of Einstein's theory in the extreme gravity
regime, where the gravitational interaction is simultaneously strong,
non-linear and dynamical. One such test concerns the rate at which the binaries
inspiral, or equ... | [
{
"created": "Thu, 13 Dec 2018 19:30:25 GMT",
"version": "v1"
},
{
"created": "Mon, 13 May 2019 23:24:44 GMT",
"version": "v2"
}
] | 2019-10-11 | [
[
"Wagle",
"Pratik",
""
],
[
"Yunes",
"Nicolas",
""
],
[
"Garfinkle",
"David",
""
],
[
"Bieri",
"Lydia",
""
]
] | The recent detection of gravitational waves by the LIGO/VIRGO collaboration has allowed for the first tests of Einstein's theory in the extreme gravity regime, where the gravitational interaction is simultaneously strong, non-linear and dynamical. One such test concerns the rate at which the binaries inspiral, or equiv... |
0911.2946 | Balakin Alexander | Alexander B. Balakin and Wei-Tou Ni | Non-minimal coupling of photons and axions | 31 pages, 2 Tables; replaced with the final version published in
Classical and Quantum Gravity | Class.Quant.Grav.27:055003,2010 | 10.1088/0264-9381/27/5/055003 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We establish a new self-consistent system of equations accounting for a
non-minimal interaction of gravitational, electromagnetic and axion fields. The
procedure is based on a non-minimal extension of the standard
Einstein-Maxwell-axion action. The general properties of a ten-parameter family
of non-minimal linear mo... | [
{
"created": "Mon, 16 Nov 2009 03:58:42 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Mar 2010 17:56:38 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Balakin",
"Alexander B.",
""
],
[
"Ni",
"Wei-Tou",
""
]
] | We establish a new self-consistent system of equations accounting for a non-minimal interaction of gravitational, electromagnetic and axion fields. The procedure is based on a non-minimal extension of the standard Einstein-Maxwell-axion action. The general properties of a ten-parameter family of non-minimal linear mode... |
0704.3368 | Thomas Cokelaer | LIGO Scientific Collaboration: B. Abbott, et al | Search for gravitational waves from binary inspirals in S3 and S4 LIGO
data | 12 pages, 11 figures | Phys.Rev.D77:062002,2008 | 10.1103/PhysRevD.77.062002 | null | gr-qc | null | We report on a search for gravitational waves from the coalescence of compact
binaries during the third and fourth LIGO science runs. The search focused on
gravitational waves generated during the inspiral phase of the binary
evolution. In our analysis, we considered three categories of compact binary
systems, ordere... | [
{
"created": "Wed, 25 Apr 2007 14:38:17 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Apr 2007 10:56:53 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Jan 2008 16:01:48 GMT",
"version": "v3"
},
{
"created": "Thu, 24 Jan 2008 10:01:17 GMT",
"version": "v4"
}
] | 2008-11-26 | [
[
"LIGO Scientific Collaboration",
"",
""
],
[
"Abbott",
"B.",
""
]
] | We report on a search for gravitational waves from the coalescence of compact binaries during the third and fourth LIGO science runs. The search focused on gravitational waves generated during the inspiral phase of the binary evolution. In our analysis, we considered three categories of compact binary systems, ordered ... |
1705.04918 | Arif Shaikh Md | Md Arif Shaikh | Relativistic sonic geometry for isothermal accretion in the Kerr metric | 37 pages, 9 figures, updated to match the published version | Class. Quantum Grav. 35 055002 (2018) | 10.1088/1361-6382/aaa5cd | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We linearly perturb advective isothermal transonic accretion onto rotating
astrophysical black holes to study the emergence of the relativistic acoustic
spacetime and to investigate how the salient features of such spacetime get
influenced by the spin angular momentum of the black hole. We have perturbed
three differ... | [
{
"created": "Sun, 14 May 2017 06:29:12 GMT",
"version": "v1"
},
{
"created": "Fri, 2 Feb 2018 05:25:40 GMT",
"version": "v2"
}
] | 2018-02-05 | [
[
"Shaikh",
"Md Arif",
""
]
] | We linearly perturb advective isothermal transonic accretion onto rotating astrophysical black holes to study the emergence of the relativistic acoustic spacetime and to investigate how the salient features of such spacetime get influenced by the spin angular momentum of the black hole. We have perturbed three differen... |
gr-qc/0111106 | Salvatore Capozziello | S. Capozziello, S. Carloni, G. Lambiase, C. Stornaiolo, A. Troisi | Curvature and Torsion Quintessence | 12 pages, proceedings of COSMO-01 | null | null | null | gr-qc | null | The issues of quintessence and cosmic acceleration can be discussed in the
framework of higher order curvature and torsion theories of gravity. We can
define effective pressure and energy density directly connected to the
curvature or to the torsion fields and then ask for the conditions to get an
accelerated expansi... | [
{
"created": "Thu, 29 Nov 2001 17:47:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Capozziello",
"S.",
""
],
[
"Carloni",
"S.",
""
],
[
"Lambiase",
"G.",
""
],
[
"Stornaiolo",
"C.",
""
],
[
"Troisi",
"A.",
""
]
] | The issues of quintessence and cosmic acceleration can be discussed in the framework of higher order curvature and torsion theories of gravity. We can define effective pressure and energy density directly connected to the curvature or to the torsion fields and then ask for the conditions to get an accelerated expansion... |
gr-qc/0507118 | Filimonova Irina V | A.F.Zakharov, A.A.Nucita, F.DePaolis, G.Ingrosso | Observational Features of Black Holes | Plenary talk presented at Workshop on High Energy Physics&Field
Theory (Protvino, Russia, 2004) | null | null | HEPFT/2004/2 | gr-qc | null | Recently considered a very attracting possibility to detect retro-MACHOs,
i.e. retro-images of the Sun by a Schwarzschild black hole. In this paper we
discuss glories (mirages) formed near rapidly rotating Kerr black hole horizons
and propose a procedure to measure masses and rotation parameters analyzing
these forms... | [
{
"created": "Thu, 28 Jul 2005 11:15:23 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Zakharov",
"A. F.",
""
],
[
"Nucita",
"A. A.",
""
],
[
"DePaolis",
"F.",
""
],
[
"Ingrosso",
"G.",
""
]
] | Recently considered a very attracting possibility to detect retro-MACHOs, i.e. retro-images of the Sun by a Schwarzschild black hole. In this paper we discuss glories (mirages) formed near rapidly rotating Kerr black hole horizons and propose a procedure to measure masses and rotation parameters analyzing these forms o... |
2110.07655 | Sourav Chowdhury Roy | Sourav Roy Chowdhury and Maxim Khlopov | The stochastic gravitational wave background from magnetars | null | null | 10.3390/universe7100381 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | Magnetars have already been a potential candidate as gravitational wave
sources that could be detected by current and future terrestrial as well as
ground based gravitational wave detectors. In this article, we focus on the
gravitational wave emission from the distorted rotating neutron stars. The
deformation is assu... | [
{
"created": "Thu, 14 Oct 2021 18:24:54 GMT",
"version": "v1"
}
] | 2021-11-22 | [
[
"Chowdhury",
"Sourav Roy",
""
],
[
"Khlopov",
"Maxim",
""
]
] | Magnetars have already been a potential candidate as gravitational wave sources that could be detected by current and future terrestrial as well as ground based gravitational wave detectors. In this article, we focus on the gravitational wave emission from the distorted rotating neutron stars. The deformation is assume... |
1801.02033 | Ali Kaya | Ali Kaya | Issues about Cosmological Ward Identities | 22 pages, revtex4-1, v3: comments and references added, to appear in
Phys. Rev. D | Phys. Rev. D 97, 063520 (2018) | 10.1103/PhysRevD.97.063520 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we first discuss how a Noether current corresponding to a gauge
or a global symmetry can locally be introduced in a path integral irrespective
of the boundary conditions defining the theory. We then consider quantization
of gravity plus minimally coupled scalar field system in the phase space path
integ... | [
{
"created": "Sat, 6 Jan 2018 15:27:35 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Jan 2018 19:43:06 GMT",
"version": "v2"
},
{
"created": "Thu, 15 Mar 2018 10:39:23 GMT",
"version": "v3"
}
] | 2018-03-28 | [
[
"Kaya",
"Ali",
""
]
] | In this paper we first discuss how a Noether current corresponding to a gauge or a global symmetry can locally be introduced in a path integral irrespective of the boundary conditions defining the theory. We then consider quantization of gravity plus minimally coupled scalar field system in the phase space path integra... |
2406.10155 | Jose Torrente Teruel | Daniel de la Fuente, Rafael M. Rubio and Jose Torrente | On Twisted Spacetimes: a new class of Galilean cosmological models | null | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | Within the generalized Newton-Cartan theory, Galilean Twisted spacetimes are
introduced as dual models of the well-known relativistic twisted spacetimes. As
a natural generalization, torqued vector fields in Galilean spacetimes are
defined, showing that the local structure of a Galilean spacetime admitting a
timelike... | [
{
"created": "Fri, 14 Jun 2024 16:16:37 GMT",
"version": "v1"
}
] | 2024-06-17 | [
[
"de la Fuente",
"Daniel",
""
],
[
"Rubio",
"Rafael M.",
""
],
[
"Torrente",
"Jose",
""
]
] | Within the generalized Newton-Cartan theory, Galilean Twisted spacetimes are introduced as dual models of the well-known relativistic twisted spacetimes. As a natural generalization, torqued vector fields in Galilean spacetimes are defined, showing that the local structure of a Galilean spacetime admitting a timelike t... |
1702.00698 | Vladimir Dzhunushaliev | Vladimir Dzhunushaliev, Vladimir Folomeev, Burkhard Kleihau and Jutta
Kunz | Dispersion relations for gravitational waves in different models of dark
energy | 6 pages | null | 10.1142/S0218271817501577 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The propagation of weak gravitational waves on the background of dark energy
is studied. The consideration is carried out within the framework of an
approximate approach where the cosmological scale factor is expanded as a power
series for relatively small values of the redshift corresponding to the epoch
of the pres... | [
{
"created": "Wed, 1 Feb 2017 08:04:23 GMT",
"version": "v1"
}
] | 2018-01-10 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
],
[
"Kleihau",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
]
] | The propagation of weak gravitational waves on the background of dark energy is studied. The consideration is carried out within the framework of an approximate approach where the cosmological scale factor is expanded as a power series for relatively small values of the redshift corresponding to the epoch of the presen... |
2405.00374 | Tayyab Naseer | M. Sharif, Tayyab Naseer | Study of Charged Cylindrical Collapse in
$f(\mathcal{R},\mathcal{T},\mathcal{Q})$ Gravity | 25 pages, no figure | Chin. J. Phys. 85(2023)41-53 | 10.1016/j.cjph.2023.06.007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper investigates the effects of electromagnetic field on the
gravitational collapse in $f(\mathcal{R},\mathcal{T},\mathcal{Q})$ theory,
where $\mathcal{Q} = \mathcal{R}_{\varphi\vartheta}
\mathcal{T}^{\varphi\vartheta}$. For this, we assume dynamical cylindrically
symmetric self-gravitating geometry which is c... | [
{
"created": "Wed, 1 May 2024 08:03:50 GMT",
"version": "v1"
}
] | 2024-05-02 | [
[
"Sharif",
"M.",
""
],
[
"Naseer",
"Tayyab",
""
]
] | This paper investigates the effects of electromagnetic field on the gravitational collapse in $f(\mathcal{R},\mathcal{T},\mathcal{Q})$ theory, where $\mathcal{Q} = \mathcal{R}_{\varphi\vartheta} \mathcal{T}^{\varphi\vartheta}$. For this, we assume dynamical cylindrically symmetric self-gravitating geometry which is cou... |
2008.12403 | Miguel Cruz | V\'ictor H. C\'ardenas, Miguel Cruz and Samuel Lepe | Cosmic expansion with matter creation and bulk viscosity | Improved version, accepted for publication in Phys. Rev. D. 12 pages,
4 figures | Phys. Rev. D 102, 123543 (2020) | 10.1103/PhysRevD.102.123543 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore the cosmological implications at effective level of matter
creation effects in a dissipative fluid for a FLRW geometry; we also perform a
statistical analysis for this kind of model. By considering an inhomogeneous
Ansatz for the particle production rate we obtain that for created matter of
dark matter typ... | [
{
"created": "Thu, 27 Aug 2020 23:04:59 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Dec 2020 21:34:55 GMT",
"version": "v2"
}
] | 2021-01-01 | [
[
"Cárdenas",
"Víctor H.",
""
],
[
"Cruz",
"Miguel",
""
],
[
"Lepe",
"Samuel",
""
]
] | We explore the cosmological implications at effective level of matter creation effects in a dissipative fluid for a FLRW geometry; we also perform a statistical analysis for this kind of model. By considering an inhomogeneous Ansatz for the particle production rate we obtain that for created matter of dark matter type ... |
2303.17874 | Koji Uryu | Koji Uryu, Shijun Yoshida, Eric Gourgoulhon, Charalampos Markakis,
Kotaro Fujisawa, Antonios Tsokaros, Keisuke Taniguchi, Mina Zamani | Equilibriums of extremely magnetized compact stars with force-free
magnetotunnels | 13 pages, 4 figures | null | 10.1103/PhysRevD.107.103016 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present numerical solutions for stationary and axisymmetric equilibriums
of compact stars associated with extremely strong magnetic fields. The interior
of the compact stars is assumed to satisfy ideal magnetohydrodynamic (MHD)
conditions, while in the region of negligible mass density the force-free
conditions or... | [
{
"created": "Fri, 31 Mar 2023 08:10:29 GMT",
"version": "v1"
}
] | 2023-06-28 | [
[
"Uryu",
"Koji",
""
],
[
"Yoshida",
"Shijun",
""
],
[
"Gourgoulhon",
"Eric",
""
],
[
"Markakis",
"Charalampos",
""
],
[
"Fujisawa",
"Kotaro",
""
],
[
"Tsokaros",
"Antonios",
""
],
[
"Taniguchi",
"Keisuke",
"... | We present numerical solutions for stationary and axisymmetric equilibriums of compact stars associated with extremely strong magnetic fields. The interior of the compact stars is assumed to satisfy ideal magnetohydrodynamic (MHD) conditions, while in the region of negligible mass density the force-free conditions or e... |
gr-qc/0309127 | Jiri Bicak | Jiri Bicak, Donald Lynden-Bell, and Joseph Katz | Toroidal Perturbations of Friedmann-Robertson-Walker Universes | 13 pages | Phys.Rev. D69 (2004) 064012 | 10.1103/PhysRevD.69.064012 | null | gr-qc astro-ph | null | Explicit expressions are found for the axisymmetric metric perturbations of
the closed, flat and open FRW universes caused by toroidal motions of the
cosmic fluid. The perturbations are decomposed in vector spherical harmonics on
2-spheres, but the radial dependence is left general. Solutions for general
odd-parity $... | [
{
"created": "Fri, 26 Sep 2003 12:06:48 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Bicak",
"Jiri",
""
],
[
"Lynden-Bell",
"Donald",
""
],
[
"Katz",
"Joseph",
""
]
] | Explicit expressions are found for the axisymmetric metric perturbations of the closed, flat and open FRW universes caused by toroidal motions of the cosmic fluid. The perturbations are decomposed in vector spherical harmonics on 2-spheres, but the radial dependence is left general. Solutions for general odd-parity $l$... |
gr-qc/0112080 | Yuri N. Obukhov | Yuri N. Obukhov | On gravitational interaction of fermions | Latex (buckow.sty), 6 pages; Invited talk presented at the Symposium
on the Centennial of Werner Heisenberg: Works And Impact, Bamberg, Germany,
26-30 September 2001 | Fortsch.Phys.50:711-716,2002 | 10.1002/1521-3978(200205)50:5/7<711::AID-PROP711>3.0.CO;2-Z | null | gr-qc | null | We discuss some aspects of the gravitational interaction of the relativistic
quantum particles with spin 1/2. The exact Foldy-Wouthuysen transformation is
constructed for the Dirac particle coupled to the static spacetime metric. The
quasi-relativistic limit of the theory is then analyzed. Using the analogous
method,... | [
{
"created": "Mon, 31 Dec 2001 16:47:19 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Obukhov",
"Yuri N.",
""
]
] | We discuss some aspects of the gravitational interaction of the relativistic quantum particles with spin 1/2. The exact Foldy-Wouthuysen transformation is constructed for the Dirac particle coupled to the static spacetime metric. The quasi-relativistic limit of the theory is then analyzed. Using the analogous method, w... |
2312.16728 | Antonios Tsokaros A. | Yufeng Luo, Antonios Tsokaros, Roland Haas, Koji Uryu | General Relativistic Stability and Gravitational Wave Content of
Rotating Triaxial Neutron Stars | 16 pages, 5 figs | Symmetry 2024, 16(3), 343 | 10.3390/sym16030343 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Triaxial neutron stars can be sources of continuous gravitational radiation
detectable by ground-based interferometers. The amplitude of the emitted
gravitational wave can be greatly affected by the state of the hydrodynamical
fluid flow inside the neutron star. In this work we examine the most triaxial
models along ... | [
{
"created": "Wed, 27 Dec 2023 21:50:31 GMT",
"version": "v1"
}
] | 2024-04-24 | [
[
"Luo",
"Yufeng",
""
],
[
"Tsokaros",
"Antonios",
""
],
[
"Haas",
"Roland",
""
],
[
"Uryu",
"Koji",
""
]
] | Triaxial neutron stars can be sources of continuous gravitational radiation detectable by ground-based interferometers. The amplitude of the emitted gravitational wave can be greatly affected by the state of the hydrodynamical fluid flow inside the neutron star. In this work we examine the most triaxial models along tw... |
2104.07281 | Peng Liu | Cheng-Yong Zhang, Peng Liu, Yunqi Liu, Chao Niu, Bin Wang | Evolution of Anti-de Sitter black holes in Einstein-Maxwell-dilaton
theory | 25 pages, 11 figures | null | 10.1103/PhysRevD.105.024010 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the nonlinear evolution of the spherical symmetric black holes under
a small neutral scalar field perturbation in Einstein-Maxwell-dilaton theory
with coupling function $f(\phi)=e^{-b\phi}$ in asymptotic anti-de Sitter
spacetime. The non-minimal coupling between scalar and Maxwell fields allows
the transmiss... | [
{
"created": "Thu, 15 Apr 2021 07:23:48 GMT",
"version": "v1"
}
] | 2022-01-19 | [
[
"Zhang",
"Cheng-Yong",
""
],
[
"Liu",
"Peng",
""
],
[
"Liu",
"Yunqi",
""
],
[
"Niu",
"Chao",
""
],
[
"Wang",
"Bin",
""
]
] | We study the nonlinear evolution of the spherical symmetric black holes under a small neutral scalar field perturbation in Einstein-Maxwell-dilaton theory with coupling function $f(\phi)=e^{-b\phi}$ in asymptotic anti-de Sitter spacetime. The non-minimal coupling between scalar and Maxwell fields allows the transmissio... |
0911.4923 | Alan Coley | A. Coley and S. Hervik | Note on the invariant classification of vacuum type D spacetimes | null | Class. Quant. Grav., v{26} p247001 (2009) | 10.1088/0264-9381/26/24/247001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We illustrate the fact that the class of vacuum type D spacetimes which are
$\mathcal{I}$-\emph{non-degenerate} are invariantly classified by their scalar
polynomial curvature invariants.
| [
{
"created": "Wed, 25 Nov 2009 17:22:39 GMT",
"version": "v1"
}
] | 2015-05-14 | [
[
"Coley",
"A.",
""
],
[
"Hervik",
"S.",
""
]
] | We illustrate the fact that the class of vacuum type D spacetimes which are $\mathcal{I}$-\emph{non-degenerate} are invariantly classified by their scalar polynomial curvature invariants. |
2111.07141 | Phongpichit Channuie | Waluka Amake (Walailak U.), Apirak Payaka (Walailak U.), Phongpichit
Channuie (Walailak U.) | Warm inflation in general scalar-tensor theory of gravity | v3: 19 pages, 3 captioned figures, version accepted by PRD | Phys. Rev. D 105, 083501 (2022) | 10.1103/PhysRevD.105.083501 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this work, we investigate warm inflationary models in the context of a
general scalar-tensor theory of gravity which is coupled to radiation through a
dissipation term. We first derive the potential of exponential and hyperbolic
tangent forms. We consider a dissipation parameter of the form $\Gamma =
C_{1}T$ with ... | [
{
"created": "Sat, 13 Nov 2021 16:11:45 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Nov 2021 04:45:35 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Apr 2022 13:46:49 GMT",
"version": "v3"
}
] | 2022-04-06 | [
[
"Amake",
"Waluka",
"",
"Walailak U."
],
[
"Payaka",
"Apirak",
"",
"Walailak U."
],
[
"Channuie",
"Phongpichit",
"",
"Walailak U."
]
] | In this work, we investigate warm inflationary models in the context of a general scalar-tensor theory of gravity which is coupled to radiation through a dissipation term. We first derive the potential of exponential and hyperbolic tangent forms. We consider a dissipation parameter of the form $\Gamma = C_{1}T$ with $C... |
1004.1223 | Akira Villar | Akira E. Villar, Eric D. Black, Riccardo DeSalvo, Kenneth G.
Libbrecht, Christophe Michel, Nazario Morgado, Laurent Pinard, Innocenzo M.
Pinto, Vincenzo Pierro, Vincenzo Galdi, Maria Principe, Ilaria Taurasi | Measurement of Thermal Noise in Multilayer Coatings with Optimized Layer
Thickness | 8 pages, 14 figures | Phys.Rev.D81:122001,2010 | 10.1103/PhysRevD.81.122001 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A standard quarter-wavelength multilayer optical coating will produce the
highest reflectivity for a given number of coating layers, but in general it
will not yield the lowest thermal noise for a prescribed reflectivity. Coatings
with the layer thicknesses optimized to minimize thermal noise could be useful
in futur... | [
{
"created": "Thu, 8 Apr 2010 02:31:07 GMT",
"version": "v1"
},
{
"created": "Sat, 10 Apr 2010 08:15:58 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Villar",
"Akira E.",
""
],
[
"Black",
"Eric D.",
""
],
[
"DeSalvo",
"Riccardo",
""
],
[
"Libbrecht",
"Kenneth G.",
""
],
[
"Michel",
"Christophe",
""
],
[
"Morgado",
"Nazario",
""
],
[
"Pinard",
"Laurent",
... | A standard quarter-wavelength multilayer optical coating will produce the highest reflectivity for a given number of coating layers, but in general it will not yield the lowest thermal noise for a prescribed reflectivity. Coatings with the layer thicknesses optimized to minimize thermal noise could be useful in future ... |
2105.09343 | Prashant Kocherlakota | Prashant Kocherlakota, Luciano Rezzolla, Heino Falcke, Christian M.
Fromm, Michael Kramer, Yosuke Mizuno, Antonios Nathanail, Hector Olivares,
Ziri Younsi, Kazunori Akiyama, Antxon Alberdi, Walter Alef, Juan Carlos
Algaba, Richard Anantua, Keiichi Asada, Rebecca Azulay, Anne-Kathrin Baczko,
David Ball, Mislav B... | Constraints on black-hole charges with the 2017 EHT observations of M87* | 15 pages, 4 figures, published in PRD on May 19 | null | 10.1103/PhysRevD.103.104047 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Our understanding of strong gravity near supermassive compact objects has
recently improved thanks to the measurements made by the Event Horizon
Telescope (EHT). We use here the M87* shadow size to infer constraints on the
physical charges of a large variety of nonrotating or rotating black holes. For
example, we sho... | [
{
"created": "Wed, 19 May 2021 18:09:53 GMT",
"version": "v1"
}
] | 2021-06-02 | [
[
"Kocherlakota",
"Prashant",
""
],
[
"Rezzolla",
"Luciano",
""
],
[
"Falcke",
"Heino",
""
],
[
"Fromm",
"Christian M.",
""
],
[
"Kramer",
"Michael",
""
],
[
"Mizuno",
"Yosuke",
""
],
[
"Nathanail",
"Antonios",
... | Our understanding of strong gravity near supermassive compact objects has recently improved thanks to the measurements made by the Event Horizon Telescope (EHT). We use here the M87* shadow size to infer constraints on the physical charges of a large variety of nonrotating or rotating black holes. For example, we show ... |
1112.5873 | Alexandre Baranov | Alexandre M.Baranov | On an Extension of a Static Ball Solution | 2 pages, Proceedings of the 12th Russian Gravitational Conference,
Kazan, 20-36 June 2005 | Gravitation & Cosmology, Vol.11 (2005), No.4 (44), pp.313-314 | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new exact static interior solution of the Einstein equations is obtained
for a gravitating ball filled with a Pascal perfect fluid . The solution is an
extension of the well-known interior solution with a parabolic distribution of
mass density and describes more compact astrophysical objects such as neutron
and hyp... | [
{
"created": "Mon, 26 Dec 2011 16:52:07 GMT",
"version": "v1"
}
] | 2020-07-17 | [
[
"Baranov",
"Alexandre M.",
""
]
] | A new exact static interior solution of the Einstein equations is obtained for a gravitating ball filled with a Pascal perfect fluid . The solution is an extension of the well-known interior solution with a parabolic distribution of mass density and describes more compact astrophysical objects such as neutron and hyper... |
gr-qc/0301128 | S. Kalyana Rama | Romesh K. Kaul and S. Kalyana Rama | Black Hole Entropy from Spin One Punctures | 4 pages. RevTex | Phys.Rev. D68 (2003) 024001 | 10.1103/PhysRevD.68.024001 | null | gr-qc hep-th | null | Recent suggestion, that the emission of a quantum of energy corresponding to
the asymptotic value of quasinormal modes of a Schwarzschild black hole should
be associated with the loss of spin one punctures from the black hole horizon,
fixes the Immirzi parameter to a definite value. We show that saturating the
horizo... | [
{
"created": "Fri, 31 Jan 2003 10:35:41 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Kaul",
"Romesh K.",
""
],
[
"Rama",
"S. Kalyana",
""
]
] | Recent suggestion, that the emission of a quantum of energy corresponding to the asymptotic value of quasinormal modes of a Schwarzschild black hole should be associated with the loss of spin one punctures from the black hole horizon, fixes the Immirzi parameter to a definite value. We show that saturating the horizon ... |
gr-qc/0111041 | Jorge Stephany | D.E. Diaz and J. Stephany | Rindler Particles and Classical Radiation | 8 pages, 2 figures | Class.Quant.Grav. 19 (2002) 3753-3760 | 10.1088/0264-9381/19/14/314 | SB/F/01-293 | gr-qc hep-th | null | We describe the quantum and classical radiation by a uniformly accelerating
point source in terms of the elementary processes of absorption and emission of
Rindler scalar photons of the Fulling-Davies-Unruh bath observed by a
co-accelerating observer.To this end we compute the emission rate by a DeWitt
detector of a ... | [
{
"created": "Tue, 13 Nov 2001 22:49:17 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Feb 2002 21:35:50 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Diaz",
"D. E.",
""
],
[
"Stephany",
"J.",
""
]
] | We describe the quantum and classical radiation by a uniformly accelerating point source in terms of the elementary processes of absorption and emission of Rindler scalar photons of the Fulling-Davies-Unruh bath observed by a co-accelerating observer.To this end we compute the emission rate by a DeWitt detector of a Mi... |
1411.4401 | Prado Martin-Moruno | Prado Martin-Moruno | Semiclassical energy conditions and wormholes | 6 pages; contribution to the proceedings of the Spanish Relativity
Meeting 2014 (ERE 2014), Valencia, 1-5 September 2014 | null | 10.1088/1742-6596/600/1/012036 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the nonlinear energy conditions and their quantum extensions.
These new energy conditions behave much better than the usual pointwise energy
conditions in the presence of semiclassical quantum effects. Analogous quantum
extensions for the linear energy conditions are not always satisfied as one
enters the... | [
{
"created": "Mon, 17 Nov 2014 09:36:39 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Martin-Moruno",
"Prado",
""
]
] | We consider the nonlinear energy conditions and their quantum extensions. These new energy conditions behave much better than the usual pointwise energy conditions in the presence of semiclassical quantum effects. Analogous quantum extensions for the linear energy conditions are not always satisfied as one enters the q... |
0910.5836 | Claus Kiefer | Claus Kiefer | Can the Arrow of Time be understood from Quantum Cosmology? | 14 pages, to appear in "The Arrow of Time", ed. by L.
Mersini-Houghton and R. Vaas | The Arrows of Time (Springer, Heidelberg 2012), pp. 191-203 | 10.1007/978-3-642-23259-6_10 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | I address the question whether the origin of the observed arrow of time can
be derived from quantum cosmology. After a general discussion of entropy in
cosmology and some numerical estimates, I give a brief introduction into
quantum geometrodynamics and argue that this may provide a sufficient framework
for studying ... | [
{
"created": "Fri, 30 Oct 2009 10:31:42 GMT",
"version": "v1"
}
] | 2012-07-27 | [
[
"Kiefer",
"Claus",
""
]
] | I address the question whether the origin of the observed arrow of time can be derived from quantum cosmology. After a general discussion of entropy in cosmology and some numerical estimates, I give a brief introduction into quantum geometrodynamics and argue that this may provide a sufficient framework for studying th... |
2408.03241 | Sunny Vagnozzi | Mohsen Khodadi, Sunny Vagnozzi, Javad T. Firouzjaee | Event Horizon Telescope observations exclude compact objects in baseline
mimetic gravity | 12 pages, 5 sub-figures arranged into 3 figures, key summary figure
of our results (diagrammatic synopsis) is Fig. 3 | null | null | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Mimetic gravity has gained significant appeal in cosmological contexts, but
static spherically symmetric space-times within the baseline theory are highly
non-trivial: the two natural solutions are a naked singularity and a black hole
space-time obtained through an appropriate gluing procedure. We study the
shadow pr... | [
{
"created": "Tue, 6 Aug 2024 15:02:43 GMT",
"version": "v1"
}
] | 2024-08-12 | [
[
"Khodadi",
"Mohsen",
""
],
[
"Vagnozzi",
"Sunny",
""
],
[
"Firouzjaee",
"Javad T.",
""
]
] | Mimetic gravity has gained significant appeal in cosmological contexts, but static spherically symmetric space-times within the baseline theory are highly non-trivial: the two natural solutions are a naked singularity and a black hole space-time obtained through an appropriate gluing procedure. We study the shadow prop... |
gr-qc/9902061 | Eric Woolgar | G.J. Galloway, K. Schleich, D.M. Witt, and E. Woolgar | Topological Censorship and Higher Genus Black Holes | 20 pages, Plain TeX | Phys.Rev.D60:104039,1999 | 10.1103/PhysRevD.60.104039 | null | gr-qc hep-th | null | Motivated by recent interest in black holes whose asymptotic geometry
approaches that of anti-de Sitter spacetime, we give a proof of topological
censorship applicable to spacetimes with such asymptotic behavior. Employing a
useful rephrasing of topological censorship as a property of homotopies of
arbitrary loops, w... | [
{
"created": "Sat, 20 Feb 1999 00:26:22 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Jun 1999 22:05:27 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Galloway",
"G. J.",
""
],
[
"Schleich",
"K.",
""
],
[
"Witt",
"D. M.",
""
],
[
"Woolgar",
"E.",
""
]
] | Motivated by recent interest in black holes whose asymptotic geometry approaches that of anti-de Sitter spacetime, we give a proof of topological censorship applicable to spacetimes with such asymptotic behavior. Employing a useful rephrasing of topological censorship as a property of homotopies of arbitrary loops, we ... |
1405.0705 | Peng Xu | Li-E Qiang (1), Peng Xu (2) ((1) Chang'an University, Xi'an, China,
(2) Academy of Mathematics and Systems Science, Chinese Academy of Sciences,
Beijing, China.) | Signature of biased range in the non-dynamical Chern-Simons modified
gravity and its measurements with satellite-satellite tracking missions:
Theoretical studies | 19 pages, 4 figures | European Physical Journal C, Vol 75, 390 (2015) | 10.1140/epjc/s10052-015-3610-7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Having great accuracy in the range and range rate measurements,he GRACE
mission and the planed GRACE Follow On mission can in principle be employed to
place strong constraints on certain relativistic gravitational theories. In
this paper, we work out the range observable of the non-dynamical Chern-Simons
modified gra... | [
{
"created": "Sun, 4 May 2014 15:12:56 GMT",
"version": "v1"
},
{
"created": "Mon, 24 Nov 2014 07:23:56 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Jul 2015 18:50:32 GMT",
"version": "v3"
},
{
"created": "Sun, 30 Aug 2015 04:53:32 GMT",
"version": "v4"
}
] | 2015-09-01 | [
[
"Qiang",
"Li-E",
""
],
[
"Xu",
"Peng",
""
]
] | Having great accuracy in the range and range rate measurements,he GRACE mission and the planed GRACE Follow On mission can in principle be employed to place strong constraints on certain relativistic gravitational theories. In this paper, we work out the range observable of the non-dynamical Chern-Simons modified gravi... |
0705.1179 | Uri Keshet | Uri Keshet and Shahar Hod | Analytic Study of Rotating Black-Hole Quasinormal Modes | Shortened and typos fixed; to appear in PRD Rapid communications | Phys.Rev.D76:061501,2007 | 10.1103/PhysRevD.76.061501 | null | gr-qc astro-ph hep-th | null | A Bohr-Sommerfeld equation is derived for the highly-damped quasinormal mode
frequencies omega(n>>1) of rotating black holes. It may be written as
2\int_C(p_r+ip_0)dr=(n+1/2)h, where p_r is the canonical momentum conjugate to
the radial coordinate r along null geodesics of energy hbar*omega and angular
momentum hbar*... | [
{
"created": "Tue, 8 May 2007 22:15:41 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Aug 2007 05:25:57 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Keshet",
"Uri",
""
],
[
"Hod",
"Shahar",
""
]
] | A Bohr-Sommerfeld equation is derived for the highly-damped quasinormal mode frequencies omega(n>>1) of rotating black holes. It may be written as 2\int_C(p_r+ip_0)dr=(n+1/2)h, where p_r is the canonical momentum conjugate to the radial coordinate r along null geodesics of energy hbar*omega and angular momentum hbar*m,... |
1010.5435 | Zhaoyan Wu | Zhaoyan Wu | Pseudotensor problem of gravitational energy-momentum and Noether's
theorem revisited | 35 pages. The new version contains one more theorem and a few more
examples to make it more convincing | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Based on a general variational principle, Noether's theorem is revisited. It
is shown that the so called pseudotensor problem of the gravitational
energy-momentum is a result of mis-reading Noether's theorem, and in fact, all
the Noether's conserved quantities are scalars. It is also shown, by using a
counter-example... | [
{
"created": "Tue, 26 Oct 2010 15:42:06 GMT",
"version": "v1"
},
{
"created": "Wed, 4 May 2011 01:52:29 GMT",
"version": "v2"
},
{
"created": "Sat, 11 Jun 2011 04:05:31 GMT",
"version": "v3"
},
{
"created": "Fri, 8 Nov 2013 17:54:29 GMT",
"version": "v4"
}
] | 2013-11-11 | [
[
"Wu",
"Zhaoyan",
""
]
] | Based on a general variational principle, Noether's theorem is revisited. It is shown that the so called pseudotensor problem of the gravitational energy-momentum is a result of mis-reading Noether's theorem, and in fact, all the Noether's conserved quantities are scalars. It is also shown, by using a counter-example, ... |
2106.05678 | Cyril Renevey | Cyril Renevey, Ryan McManus, Charles Dalang, Lucas Lombriser | The effect of screening mechanisms on black hole binary inspiral
waveforms | 26 pages, 1 figure | null | 10.1103/PhysRevD.105.084059 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar-tensor theories leaving significant modifications of gravity at
cosmological scales rely on screening mechanisms to recover General Relativity
(GR) in high-density regions and pass stringent tests with astrophysical
objects. Much focus has been placed on the signatures of such modifications of
gravity on the p... | [
{
"created": "Thu, 10 Jun 2021 11:50:19 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Dec 2021 13:01:49 GMT",
"version": "v2"
}
] | 2022-05-11 | [
[
"Renevey",
"Cyril",
""
],
[
"McManus",
"Ryan",
""
],
[
"Dalang",
"Charles",
""
],
[
"Lombriser",
"Lucas",
""
]
] | Scalar-tensor theories leaving significant modifications of gravity at cosmological scales rely on screening mechanisms to recover General Relativity (GR) in high-density regions and pass stringent tests with astrophysical objects. Much focus has been placed on the signatures of such modifications of gravity on the pro... |
1606.08586 | Genly Le\'on | Joey Latta (Dalhousie U., Math. Dept.), Genly Leon (Valparaiso U.,
Catolica) and Andronikos Paliathanasis (Chile Austral U., Valdivia) | Kantowski-Sachs Einstein-{\ae}ther perfect fluid models | 28 pages, 12 eps figures (4 compound figures). Minor revision of
previous version. Matches the published version | JCAP11(2016)051 | 10.1088/1475-7516/2016/11/051 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate Kantowski-Sachs models in Einstein-{\ae}ther theory with a
perfect fluid source using the singularity analysis to prove the integrability
of the field equations and dynamical system tools to study the evolution. We
find an inflationary source at early times, and an inflationary sink at late
times, for ... | [
{
"created": "Tue, 28 Jun 2016 07:33:52 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Oct 2016 21:57:21 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Nov 2016 16:33:41 GMT",
"version": "v3"
}
] | 2016-11-24 | [
[
"Latta",
"Joey",
"",
"Dalhousie U., Math. Dept."
],
[
"Leon",
"Genly",
"",
"Valparaiso U.,\n Catolica"
],
[
"Paliathanasis",
"Andronikos",
"",
"Chile Austral U., Valdivia"
]
] | We investigate Kantowski-Sachs models in Einstein-{\ae}ther theory with a perfect fluid source using the singularity analysis to prove the integrability of the field equations and dynamical system tools to study the evolution. We find an inflationary source at early times, and an inflationary sink at late times, for a ... |
0812.4742 | Branislav Cvetkovi\'c | M. Blagojevi\'c and B. Cvetkovi\'c | Canonical structure of topologically massive gravity with a cosmological
constant | LATEX, 19 pages, v2: Extended version of v1 | JHEP 0905:073,2009 | 10.1088/1126-6708/2009/05/073 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the canonical structure of three-dimensional topologically massive
gravity with a cosmological constant, using the full power of Dirac's method
for constrained Hamiltonian systems. It is found that the dimension of the
physical phase space is two per spacetime point, which corresponds to a single
Lagrangian ... | [
{
"created": "Sat, 27 Dec 2008 12:38:31 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Jan 2009 18:50:59 GMT",
"version": "v2"
},
{
"created": "Wed, 20 May 2009 15:45:34 GMT",
"version": "v3"
}
] | 2009-05-29 | [
[
"Blagojević",
"M.",
""
],
[
"Cvetković",
"B.",
""
]
] | We study the canonical structure of three-dimensional topologically massive gravity with a cosmological constant, using the full power of Dirac's method for constrained Hamiltonian systems. It is found that the dimension of the physical phase space is two per spacetime point, which corresponds to a single Lagrangian de... |
2401.03553 | Finnian Gray | Finnian Gray and David Kubiznak | Homogeneous Symmetry Operators in Kerr--NUT--AdS Spacetimes | null | Phys. Rev. D 109, 084027, April 2024 | 10.1103/PhysRevD.109.084027 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | It is well known that the Kerr--NUT--AdS spacetimes possess hidden symmetries
encoded in the so-called principal Killing--Yano tensor. In this paper,
focusing on the four-dimensional case, we obtain a number of symmetry operators
for scalar, vector, and tensor perturbations, that are of degree two (to be
defined belo... | [
{
"created": "Sun, 7 Jan 2024 17:27:20 GMT",
"version": "v1"
},
{
"created": "Thu, 4 Jul 2024 08:30:42 GMT",
"version": "v2"
}
] | 2024-07-08 | [
[
"Gray",
"Finnian",
""
],
[
"Kubiznak",
"David",
""
]
] | It is well known that the Kerr--NUT--AdS spacetimes possess hidden symmetries encoded in the so-called principal Killing--Yano tensor. In this paper, focusing on the four-dimensional case, we obtain a number of symmetry operators for scalar, vector, and tensor perturbations, that are of degree two (to be defined below)... |
gr-qc/0405146 | Emanuele Berti | Emanuele Berti, Frances White, Asimina Maniopoulou, Marco Bruni | Rotating neutron stars: an invariant comparison of approximate and
numerical spacetime models | 19 pages, 9 figures, accepted in MNRAS; improved presentation, some
new analytical results in Section 5.2 | Mon.Not.Roy.Astron.Soc.358:923-938,2005 | 10.1111/j.1365-2966.2005.08812.x/abs/ | null | gr-qc astro-ph | null | We compare three different models of rotating neutron star spacetimes: the
Hartle-Thorne (HT) slow-rotation approximation at second order in rotation, the
exact analytic vacuum solution of Manko et al. and a numerical solution of the
full Einstein equations. We integrate the HT structure equations for five
representa... | [
{
"created": "Sat, 29 May 2004 21:47:59 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Jan 2005 11:09:43 GMT",
"version": "v2"
}
] | 2011-05-23 | [
[
"Berti",
"Emanuele",
""
],
[
"White",
"Frances",
""
],
[
"Maniopoulou",
"Asimina",
""
],
[
"Bruni",
"Marco",
""
]
] | We compare three different models of rotating neutron star spacetimes: the Hartle-Thorne (HT) slow-rotation approximation at second order in rotation, the exact analytic vacuum solution of Manko et al. and a numerical solution of the full Einstein equations. We integrate the HT structure equations for five representati... |
2006.14176 | Hernando Quevedo | Walter Pulido and Hernando Quevedo | Black shells and naked shells | Typos corrected; references added; new sections and comments added | null | 10.1142/S0219887821502005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the collapse of a thin dust shell from the point of view of the
horizon dynamics. We identify the critical surfaces at which time and space
coordinates interchange their roles and investigate their properties by using
the formalism of trapped surfaces. We show the existence of marginally outer
trapped surfac... | [
{
"created": "Thu, 25 Jun 2020 05:01:12 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jul 2020 13:58:26 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Jun 2021 18:04:47 GMT",
"version": "v3"
}
] | 2021-11-10 | [
[
"Pulido",
"Walter",
""
],
[
"Quevedo",
"Hernando",
""
]
] | We study the collapse of a thin dust shell from the point of view of the horizon dynamics. We identify the critical surfaces at which time and space coordinates interchange their roles and investigate their properties by using the formalism of trapped surfaces. We show the existence of marginally outer trapped surfaces... |
2102.00017 | Matteo Breschi | Matteo Breschi, Rossella Gamba, Sebastiano Bernuzzi | ${\tt bajes}$: Bayesian inference of multimessenger astrophysical data,
methods and application to gravitational-waves | null | Phys. Rev. D 104, 042001 (2021) | 10.1103/PhysRevD.104.042001 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We present ${\tt bajes}$, a parallel and lightweight framework for Bayesian
inference of multimessenger transients. ${\tt bajes}$ is a Python modular
package with minimal dependencies on external libraries adaptable to the
majority of the Bayesian models and to various sampling methods. We describe
the general workfl... | [
{
"created": "Fri, 29 Jan 2021 19:00:13 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Aug 2021 14:40:19 GMT",
"version": "v2"
}
] | 2021-08-18 | [
[
"Breschi",
"Matteo",
""
],
[
"Gamba",
"Rossella",
""
],
[
"Bernuzzi",
"Sebastiano",
""
]
] | We present ${\tt bajes}$, a parallel and lightweight framework for Bayesian inference of multimessenger transients. ${\tt bajes}$ is a Python modular package with minimal dependencies on external libraries adaptable to the majority of the Bayesian models and to various sampling methods. We describe the general workflow... |
0805.1792 | Tiberiu Harko | T. Harko, W. F. Choi, K. C. Wong, K. S. Cheng | Reheating the Universe in Braneworld Cosmological Models with bulk-brane
energy transfer | 29 pages, 9 figures, accepted for publication in JCAP | JCAP 0806:002,2008 | 10.1088/1475-7516/2008/06/002 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The emergence of the cosmological composition (the reheating era) after the
inflationary period is analyzed in the framework of the braneworld models, in
which our Universe is a three-brane embedded in a five-dimensional bulk, by
assuming the possibility of the brane-bulk energy exchange. The inflaton field
is assume... | [
{
"created": "Tue, 13 May 2008 07:14:13 GMT",
"version": "v1"
},
{
"created": "Wed, 28 May 2008 04:55:38 GMT",
"version": "v2"
}
] | 2009-11-18 | [
[
"Harko",
"T.",
""
],
[
"Choi",
"W. F.",
""
],
[
"Wong",
"K. C.",
""
],
[
"Cheng",
"K. S.",
""
]
] | The emergence of the cosmological composition (the reheating era) after the inflationary period is analyzed in the framework of the braneworld models, in which our Universe is a three-brane embedded in a five-dimensional bulk, by assuming the possibility of the brane-bulk energy exchange. The inflaton field is assumed ... |
0912.0628 | Luis Manuel Gonzalez-Romero | L. M. Gonz\'alez-Romero, J. L. Bl\'azquez-Salcedo | Core-crust transition pressure evolution in post-glitch epoch for a
Vela-type pulsar | 4 pages, 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose that the \textit{post-glitch} epoch in a Vela-type pulsar
corresponds to a transition time in which the broken \textit{crust} is
readjusting its temperature and core-\textit{crust} transition pressure after
the changes produced by the \textit{glitch}. To describe the evolution of the
pulsar in this epoch w... | [
{
"created": "Thu, 3 Dec 2009 11:41:06 GMT",
"version": "v1"
}
] | 2009-12-04 | [
[
"González-Romero",
"L. M.",
""
],
[
"Blázquez-Salcedo",
"J. L.",
""
]
] | We propose that the \textit{post-glitch} epoch in a Vela-type pulsar corresponds to a transition time in which the broken \textit{crust} is readjusting its temperature and core-\textit{crust} transition pressure after the changes produced by the \textit{glitch}. To describe the evolution of the pulsar in this epoch we ... |
gr-qc/0612045 | Aurelien Barrau | A. Barrau | World-making with extended gravity black holes for cosmic natural
selection in the multiverse scenario | 5 pages, 1 figure. Proceedings of the Eleventh Marcel Grossmann
Meeting on General Relativity, edited by H. Kleinert, R.T. Jantzen and R.
Ruffini, World Scientific, Singapore, 2007 | null | 10.1142/9789812834300_0149 | LPSC-06.118 | gr-qc astro-ph hep-ph hep-th math-ph math.MP | null | Physics is facing contingency. Not only in facts but also in laws (the
frontier becoming extremely narrow). Cosmic natural selection is a tantalizing
idea to explain the apparently highly improbable structure of our Universe. In
this brief note I will study the creation of Universes by black holes in
-string inspired... | [
{
"created": "Thu, 7 Dec 2006 14:53:08 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Feb 2007 15:53:33 GMT",
"version": "v2"
}
] | 2018-12-19 | [
[
"Barrau",
"A.",
""
]
] | Physics is facing contingency. Not only in facts but also in laws (the frontier becoming extremely narrow). Cosmic natural selection is a tantalizing idea to explain the apparently highly improbable structure of our Universe. In this brief note I will study the creation of Universes by black holes in -string inspired- ... |
1212.5731 | S. Hamid Mehdipour | S. Hamid Mehdipour | Gravitational energy of a noncommutative Vaidya black hole | 10 pages, no figure, to appear in Can. J. Phys | Can. J. Phys., Vol. 91, No. 3 (2013) 242-245 | 10.1139/cjp-2012-0485 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we evaluate the components of the energy-momentum pseudotensors
of Landau and Lifshitz for the noncommutative Vaidya spacetime. The effective
gravitational mass experienced by a neutral test particle present at any finite
distance in the gravitational field of the noncommutative Vaidya black hole is
der... | [
{
"created": "Sat, 22 Dec 2012 21:53:32 GMT",
"version": "v1"
}
] | 2013-04-04 | [
[
"Mehdipour",
"S. Hamid",
""
]
] | In this paper we evaluate the components of the energy-momentum pseudotensors of Landau and Lifshitz for the noncommutative Vaidya spacetime. The effective gravitational mass experienced by a neutral test particle present at any finite distance in the gravitational field of the noncommutative Vaidya black hole is deriv... |
1111.3807 | Hamid Reza Sepangi | A. S. Sefiedgar and H. R. Sepangi | Corrections to the Cardy-Verlinde formula from the modified dispersion
relation in extra dimensions | 9 pages, to appear in PLB | Phys. Lett. B 706 (2012) 431 | 10.1016/j.physletb.2011.11.027 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The modified dispersion relation as a common feature of all quantum gravity
scenarios provides a perturbation framework upon which the black hole
thermodynamics can be corrected. In this letter, we obtain the corrections to
the $d$-dimensional Schwarzschild black hole thermodynamics by utilizing the
extra dimensional... | [
{
"created": "Wed, 16 Nov 2011 14:11:19 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Nov 2011 12:01:29 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Sefiedgar",
"A. S.",
""
],
[
"Sepangi",
"H. R.",
""
]
] | The modified dispersion relation as a common feature of all quantum gravity scenarios provides a perturbation framework upon which the black hole thermodynamics can be corrected. In this letter, we obtain the corrections to the $d$-dimensional Schwarzschild black hole thermodynamics by utilizing the extra dimensional f... |
1007.4669 | Jonathan Middleton | Jonathan Middleton | On The Existence Of Anisotropic Cosmological Models In Higher-Order
Theories Of Gravity | 24 pages, submitted to CQG | Class.Quant.Grav.27:225013,2010 | 10.1088/0264-9381/27/22/225013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the behaviour on approach to the initial singularity in
higher-order extensions of general relativity by finding exact cosmological
solutions for a wide class of models in which the Lagrangian is allowed to
depend nonlinearly upon the three possible linear and quadratic scalars built
from the Riemann t... | [
{
"created": "Tue, 27 Jul 2010 10:41:39 GMT",
"version": "v1"
}
] | 2014-11-21 | [
[
"Middleton",
"Jonathan",
""
]
] | We investigate the behaviour on approach to the initial singularity in higher-order extensions of general relativity by finding exact cosmological solutions for a wide class of models in which the Lagrangian is allowed to depend nonlinearly upon the three possible linear and quadratic scalars built from the Riemann ten... |
gr-qc/9907098 | Thomas W. Baumgarte | T. W. Baumgarte, S. A. Hughes, L. Rezzolla, S. L. Shapiro and M.
Shibata | Implementing fully relativistic hydrodynamics in three dimensions | 5 Pages, 4 Figures, submitted to Proceedings of the 8th Canadian
Conference on General Relativity and Relativistic Astrophysics | null | 10.1063/1.1301563 | null | gr-qc astro-ph | null | We report on our numerical implementation of fully relativistic hydrodynamics
coupled to Einstein's field equations in three spatial dimensions. We briefly
review several steps in our code development, including our recasting of
Einstein's equations and several tests which demonstrate its advantages for
numerical int... | [
{
"created": "Wed, 28 Jul 1999 18:25:01 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Baumgarte",
"T. W.",
""
],
[
"Hughes",
"S. A.",
""
],
[
"Rezzolla",
"L.",
""
],
[
"Shapiro",
"S. L.",
""
],
[
"Shibata",
"M.",
""
]
] | We report on our numerical implementation of fully relativistic hydrodynamics coupled to Einstein's field equations in three spatial dimensions. We briefly review several steps in our code development, including our recasting of Einstein's equations and several tests which demonstrate its advantages for numerical integ... |
1505.06260 | Paulo Luz | Paulo Luz, Jos\'e P. S. Lemos | Newtonian wormholes with spherical symmetry and tidal forces on test
particles | 12 pages, 2 figures. Accepted for publication in International
Journal of Modern Physics D | International Journal of Modern Physics D 24, 1550054 (2015) | null | null | gr-qc astro-ph.SR hep-th physics.class-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A spherically symmetric wormhole in Newtonian gravitation in curved space,
enhanced with a connection between the mass density and the Ricci scalar, is
presented. The wormhole, consisting of two connected asymptotically flat
regions, inhabits a spherically symmetric curved space. The gravitational
potential, gravitat... | [
{
"created": "Sat, 23 May 2015 01:54:47 GMT",
"version": "v1"
}
] | 2016-03-23 | [
[
"Luz",
"Paulo",
""
],
[
"Lemos",
"José P. S.",
""
]
] | A spherically symmetric wormhole in Newtonian gravitation in curved space, enhanced with a connection between the mass density and the Ricci scalar, is presented. The wormhole, consisting of two connected asymptotically flat regions, inhabits a spherically symmetric curved space. The gravitational potential, gravitatio... |
0710.3415 | Viktor Toth | J. W. Moffat and V. T. Toth | Modified gravity and the origin of inertia | 4 pages, 3 figures; published version with updated references | MNRAS 395 (2009) L25-L28 | 10.1111/j.1745-3933.2009.00633.x | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified gravity theory is known to violate Birkhoff's theorem. We explore a
key consequence of this violation, the effect of distant matter in the Universe
on the motion of test particles. We find that when a particle is accelerated, a
force is experienced that is proportional to the particle's mass and
acceleration... | [
{
"created": "Thu, 18 Oct 2007 00:55:13 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Nov 2007 15:49:25 GMT",
"version": "v2"
},
{
"created": "Mon, 5 May 2008 22:34:50 GMT",
"version": "v3"
},
{
"created": "Fri, 6 Jun 2008 16:33:37 GMT",
"version": "v4"
},
{
"cre... | 2009-04-10 | [
[
"Moffat",
"J. W.",
""
],
[
"Toth",
"V. T.",
""
]
] | Modified gravity theory is known to violate Birkhoff's theorem. We explore a key consequence of this violation, the effect of distant matter in the Universe on the motion of test particles. We find that when a particle is accelerated, a force is experienced that is proportional to the particle's mass and acceleration a... |
1803.01119 | Suddhasattwa Brahma | Martin Bojowald, Suddhasattwa Brahma and Dong-han Yeom | Effective line elements and black-hole models in canonical (loop)
quantum gravity | 27 pages; v2: matches published version | Phys. Rev. D 98, 046015 (2018) | 10.1103/PhysRevD.98.046015 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Canonical quantization is often used to suggest new effects in quantum
gravity, in the dynamics as well as the structure of space-time. Usually,
possible phenomena are first seen in a modified version of the classical
dynamics, for instance in an effective Friedmann equation, but there should
also be implications for... | [
{
"created": "Sat, 3 Mar 2018 07:18:09 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Nov 2018 23:07:14 GMT",
"version": "v2"
}
] | 2018-11-12 | [
[
"Bojowald",
"Martin",
""
],
[
"Brahma",
"Suddhasattwa",
""
],
[
"Yeom",
"Dong-han",
""
]
] | Canonical quantization is often used to suggest new effects in quantum gravity, in the dynamics as well as the structure of space-time. Usually, possible phenomena are first seen in a modified version of the classical dynamics, for instance in an effective Friedmann equation, but there should also be implications for a... |
1108.3237 | Erico Goulart | E. Goulart, Santiago Esteban Perez Bergliaffa | Effective metric in nonlinear scalar field theories | null | null | 10.1103/PhysRevD.84.105027 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss several features of the propagation of perturbations in nonlinear
scalar field theories using the effective metric. It is shown that the
effective metric can be classified according to whether the gradient of the
scalar field is timelike, null, or spacelike, and this classification is
illustrated with two ... | [
{
"created": "Tue, 16 Aug 2011 13:19:18 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Goulart",
"E.",
""
],
[
"Bergliaffa",
"Santiago Esteban Perez",
""
]
] | We discuss several features of the propagation of perturbations in nonlinear scalar field theories using the effective metric. It is shown that the effective metric can be classified according to whether the gradient of the scalar field is timelike, null, or spacelike, and this classification is illustrated with two ex... |
2002.09429 | Derek Davis | Derek Davis, Laurel V. White, Peter R. Saulson | Utilizing aLIGO Glitch Classifications to Validate Gravitational-Wave
Candidates | 16 pages, 6 figures | null | 10.1088/1361-6382/ab91e6 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Advanced LIGO data contains numerous noise transients, or "glitches", that
have been shown to reduce the sensitivity of matched filter searches for
gravitational waves from compact binaries by increasing the rate at which
random coincidences occur. The presence of these transients has precipitated
extensive work to e... | [
{
"created": "Fri, 21 Feb 2020 17:22:25 GMT",
"version": "v1"
}
] | 2020-08-26 | [
[
"Davis",
"Derek",
""
],
[
"White",
"Laurel V.",
""
],
[
"Saulson",
"Peter R.",
""
]
] | Advanced LIGO data contains numerous noise transients, or "glitches", that have been shown to reduce the sensitivity of matched filter searches for gravitational waves from compact binaries by increasing the rate at which random coincidences occur. The presence of these transients has precipitated extensive work to est... |
gr-qc/0612013 | Kishore Ananda N | Kishore N. Ananda, Chris Clarkson, David Wands (ICG, Portsmouth) | The cosmological gravitational wave background from primordial density
perturbations | 8 Pages | Phys.Rev.D75:123518,2007 | 10.1103/PhysRevD.75.123518 | null | gr-qc astro-ph hep-ph | null | We discuss the gravitational wave background generated by primordial density
perturbations evolving during the radiation era. At second-order in a
perturbative expansion, density fluctuations produce gravitational waves. We
calculate the power spectra of gravitational waves from this mechanism, and
show that, in prin... | [
{
"created": "Fri, 1 Dec 2006 17:54:02 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ananda",
"Kishore N.",
"",
"ICG, Portsmouth"
],
[
"Clarkson",
"Chris",
"",
"ICG, Portsmouth"
],
[
"Wands",
"David",
"",
"ICG, Portsmouth"
]
] | We discuss the gravitational wave background generated by primordial density perturbations evolving during the radiation era. At second-order in a perturbative expansion, density fluctuations produce gravitational waves. We calculate the power spectra of gravitational waves from this mechanism, and show that, in princi... |
gr-qc/0702011 | F\'abio Dahia | F. Dahia and C. Romero | Confinement and stability of the motion of test particles in thick
branes | 1 figure. Extended analysis to treat general thick branes RSII-type.
Added references | Phys.Lett.B651:232-238,2007 | 10.1016/j.physletb.2007.06.004 | null | gr-qc | null | We consider the motion of test particles in a thick brane version of
Randall-Sundrum type II model. It is known that gravity alone cannot explain
the confinement of test particles in this kind of brane. In this paper we show
that a stable confinement in a domain wall is possible by admitting a direct
interaction betw... | [
{
"created": "Fri, 2 Feb 2007 01:52:34 GMT",
"version": "v1"
},
{
"created": "Fri, 7 Dec 2007 19:20:15 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Dahia",
"F.",
""
],
[
"Romero",
"C.",
""
]
] | We consider the motion of test particles in a thick brane version of Randall-Sundrum type II model. It is known that gravity alone cannot explain the confinement of test particles in this kind of brane. In this paper we show that a stable confinement in a domain wall is possible by admitting a direct interaction betwee... |
gr-qc/9609037 | null | Sunme Kim and Freydoon Mansouri | The Structure of Space-Time Emerging from the Two-Superbody Problem in
Chern Simons Supergravity | 10 pages, LaTex | Phys.Lett.B397:81-87,1997 | 10.1016/S0370-2693(97)00148-2 | UCTP104.96 | gr-qc | null | We show that the exact solution of the two_superbody problem in N=2 Chern
Simons Supergravity in 2+1 dimensions leads to a supermultiplet of space-times.
This supersymmetric space-time is characterized by the two gauge invariant
observables of the super Poincare' group, which may be viewed as the Casimir
invariants o... | [
{
"created": "Thu, 12 Sep 1996 22:08:49 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Kim",
"Sunme",
""
],
[
"Mansouri",
"Freydoon",
""
]
] | We show that the exact solution of the two_superbody problem in N=2 Chern Simons Supergravity in 2+1 dimensions leads to a supermultiplet of space-times. This supersymmetric space-time is characterized by the two gauge invariant observables of the super Poincare' group, which may be viewed as the Casimir invariants of ... |
gr-qc/0003027 | Carlos Lousto | J. Baker, B. Bruegmann, M. Campanelli and C. O. Lousto (AEI-Golm) | Gravitational waves from black hole collisions via an eclectic approach | 4 pages, 3 eps figures, Revtex | Class.Quant.Grav.17:L149-L156,2000 | 10.1088/0264-9381/17/20/102 | AEI-2000-015 | gr-qc astro-ph hep-th | null | We present the first results in a new program intended to make the best use
of all available technologies to provide an effective understanding of waves
from inspiralling black hole binaries in time for imminent observations. In
particular, we address the problem of combining the close-limit approximation
describing ... | [
{
"created": "Wed, 8 Mar 2000 16:17:00 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Baker",
"J.",
"",
"AEI-Golm"
],
[
"Bruegmann",
"B.",
"",
"AEI-Golm"
],
[
"Campanelli",
"M.",
"",
"AEI-Golm"
],
[
"Lousto",
"C. O.",
"",
"AEI-Golm"
]
] | We present the first results in a new program intended to make the best use of all available technologies to provide an effective understanding of waves from inspiralling black hole binaries in time for imminent observations. In particular, we address the problem of combining the close-limit approximation describing ri... |
2402.16136 | Francesco Marino | Samuel L. Braunstein, Mir Faizal, Lawrence M. Krauss, Francesco
Marino, Naveed A. Shah | Analogue simulations of quantum gravity with fluids | Accepted version in Nature Reviews Physics. A view-only version of
the manuscript with edited figures and additional references can be accessed
at the link https://rdcu.be/dj6CN | Nature Reviews Physics 5, 612-622 (2023) | 10.1038/s42254-023-00630-y | null | gr-qc cond-mat.quant-gas hep-th physics.flu-dyn quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent technological advances in controlling and manipulating fluids have
enabled the experimental realization of acoustic analogues of gravitational
black holes. A flowing fluid provides an effective curved spacetime on which
sound waves can propagate, allowing the simulation of gravitational geometries
and rela... | [
{
"created": "Sun, 25 Feb 2024 16:21:43 GMT",
"version": "v1"
}
] | 2024-02-27 | [
[
"Braunstein",
"Samuel L.",
""
],
[
"Faizal",
"Mir",
""
],
[
"Krauss",
"Lawrence M.",
""
],
[
"Marino",
"Francesco",
""
],
[
"Shah",
"Naveed A.",
""
]
] | The recent technological advances in controlling and manipulating fluids have enabled the experimental realization of acoustic analogues of gravitational black holes. A flowing fluid provides an effective curved spacetime on which sound waves can propagate, allowing the simulation of gravitational geometries and relate... |
gr-qc/0003022 | Bahram Mashhoon | Bahram Mashhoon | Gravitational Couplings of Intrinsic Spin | LaTeX file, no figures, 16 pages | Class.Quant.Grav. 17 (2000) 2399-2410 | 10.1088/0264-9381/17/12/312 | null | gr-qc | null | The gravitational couplings of intrinsic spin are briefly reviewed. A
consequence of the Dirac equation in the exterior gravitational field of a
rotating mass is considered in detail, namely, the difference in the energy of
a spin-1/2 particle polarized vertically up and down near the surface of a
rotating body is $\... | [
{
"created": "Tue, 7 Mar 2000 23:14:42 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Mashhoon",
"Bahram",
""
]
] | The gravitational couplings of intrinsic spin are briefly reviewed. A consequence of the Dirac equation in the exterior gravitational field of a rotating mass is considered in detail, namely, the difference in the energy of a spin-1/2 particle polarized vertically up and down near the surface of a rotating body is $\hb... |
2404.03095 | Christopher Helmerich | Christopher Helmerich, Jared Fuchs, Alexey Bobrick, Luke Sellers,
Brandon Melcher, Gianni Martire | Analyzing Warp Drive Spacetimes with Warp Factory | 36 pages, 22 figures, Accepted in Classical and Quantum Gravity, For
supplementary material, see https://doi.org/10.1088/1361-6382/ad2e42 | null | 10.1088/1361-6382/ad2e42 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The field of warp research has been dominated by analytical methods to
investigate potential solutions. However, these approaches often favor simple
metric forms that facilitate analysis but ultimately limit the range of
exploration of novel solutions. So far the proposed solutions have been
unphysical, requiring ene... | [
{
"created": "Wed, 3 Apr 2024 22:18:49 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Apr 2024 17:18:19 GMT",
"version": "v2"
}
] | 2024-04-11 | [
[
"Helmerich",
"Christopher",
""
],
[
"Fuchs",
"Jared",
""
],
[
"Bobrick",
"Alexey",
""
],
[
"Sellers",
"Luke",
""
],
[
"Melcher",
"Brandon",
""
],
[
"Martire",
"Gianni",
""
]
] | The field of warp research has been dominated by analytical methods to investigate potential solutions. However, these approaches often favor simple metric forms that facilitate analysis but ultimately limit the range of exploration of novel solutions. So far the proposed solutions have been unphysical, requiring energ... |
2407.15347 | Leo Rodriguez | Shanshan Rodriguez, Alex Sidler, Leo Rodriguez, L. R. Ram-Mohan | Energy extraction through Comisso-Asenjo process from a Kerr-Newman
black hole in perfect fluid dark matter | 11 pages, 7 figures | null | null | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work, we provide a thorough analysis of energy extraction via
magnetic reconnection, a novel mechanism recently proposed by Comisso and
Asenjo, for a Kerr-Newman black hole immersed in a perfect fluid dark matter
(PFDM) background. Our studies focus on the impact of black hole spin $a$,
electric charge $Q$ an... | [
{
"created": "Mon, 22 Jul 2024 03:14:47 GMT",
"version": "v1"
}
] | 2024-07-23 | [
[
"Rodriguez",
"Shanshan",
""
],
[
"Sidler",
"Alex",
""
],
[
"Rodriguez",
"Leo",
""
],
[
"Ram-Mohan",
"L. R.",
""
]
] | In this work, we provide a thorough analysis of energy extraction via magnetic reconnection, a novel mechanism recently proposed by Comisso and Asenjo, for a Kerr-Newman black hole immersed in a perfect fluid dark matter (PFDM) background. Our studies focus on the impact of black hole spin $a$, electric charge $Q$ and ... |
1011.3940 | Bijan Saha Dr. | Hassan Amirhashchi, Anirudh Pradhan and Bijan Saha | An Interacting Two-Fluid Scenario for Dark Energy in FRW Universe | 11 pages, accepted for publication in Chinese Physics Letters. Unlike
the previous version the new one contains the time depending deceleration
parameter | Chin. Phys. Lett. 28(3), (2011) 039801-4 | 10.1088/0256-307X/28/3/039801 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the evolution of the dark energy parameter within the scope of a
spatially flat and isotropic Friedmann-Robertson-Walker (FRW) model filled with
barotropic fluid and dark energy. To obtain the deterministic solution we
choose the scale factor $a(t) = \sqrt{t e^{t}}$ which yields a time dependent
deceleration... | [
{
"created": "Wed, 17 Nov 2010 10:59:03 GMT",
"version": "v1"
},
{
"created": "Fri, 14 Jan 2011 12:25:40 GMT",
"version": "v2"
}
] | 2015-05-01 | [
[
"Amirhashchi",
"Hassan",
""
],
[
"Pradhan",
"Anirudh",
""
],
[
"Saha",
"Bijan",
""
]
] | We study the evolution of the dark energy parameter within the scope of a spatially flat and isotropic Friedmann-Robertson-Walker (FRW) model filled with barotropic fluid and dark energy. To obtain the deterministic solution we choose the scale factor $a(t) = \sqrt{t e^{t}}$ which yields a time dependent deceleration p... |
1509.01772 | George F. R. Ellis | George F. R. Ellis | 100 Years of General Relativity | 36 pages, 4 figures. This version corrects incorrect remarks made
regarding the use of the post-Newtonian approximation in Section 6.4 of the
printed version | null | null | null | gr-qc physics.hist-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is Chapter 1 in the book General Relativity and Gravitation: A
Centennial Perspective, Edited by Abhay Ashtekar (Editor in Chief), Beverly
Berger, James Isenberg, Malcolm MacCallum. Publisher: Cambridge University
Press (June, 2015). It gives a survey of themes that have been developed during
the 100 years of pr... | [
{
"created": "Sun, 6 Sep 2015 06:11:40 GMT",
"version": "v1"
}
] | 2015-09-08 | [
[
"Ellis",
"George F. R.",
""
]
] | This is Chapter 1 in the book General Relativity and Gravitation: A Centennial Perspective, Edited by Abhay Ashtekar (Editor in Chief), Beverly Berger, James Isenberg, Malcolm MacCallum. Publisher: Cambridge University Press (June, 2015). It gives a survey of themes that have been developed during the 100 years of prog... |
1507.05312 | Phuc Nguyen | Phuc H. Nguyen, Richard Matzner | Modelling LARES temperature distribution and thermal drag | 24 pages, multiple figures. v4: typos in footnote 1 corrected | Eur. Phys. J. Plus (2015) 130: 206 | 10.1140/epjp/i2015-15206-2 | UTTG-16-15, TCC-006-15 | gr-qc physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The LARES satellite, a laser-ranged space experiment to contribute to
geophysics observation, and to measure the general relativistic Lense-Thirring
effect, has been observed to undergo an anomalous along-track orbital
acceleration of -0.4 pm/s$^2$ (pm := picometer). This "drag" is not surprising;
along track drag ha... | [
{
"created": "Sun, 19 Jul 2015 17:48:56 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Jul 2015 22:09:52 GMT",
"version": "v2"
},
{
"created": "Tue, 13 Oct 2015 17:08:54 GMT",
"version": "v3"
},
{
"created": "Fri, 4 Mar 2016 15:09:44 GMT",
"version": "v4"
}
] | 2016-03-07 | [
[
"Nguyen",
"Phuc H.",
""
],
[
"Matzner",
"Richard",
""
]
] | The LARES satellite, a laser-ranged space experiment to contribute to geophysics observation, and to measure the general relativistic Lense-Thirring effect, has been observed to undergo an anomalous along-track orbital acceleration of -0.4 pm/s$^2$ (pm := picometer). This "drag" is not surprising; along track drag has ... |
gr-qc/0106047 | Manoelito M. de Souza | Manoelito M. de Souza | Discrete interactions and the Pioneer anomalous acceleration:
Alternative II | 8 pages with calculation details of alternative II of gr-qc/0106096 | null | null | null | gr-qc astro-ph hep-th | null | The dominant contributions from a discrete gravitational interaction produce
the standard potential as an effective continuous field. The sub-dominant
contributions are, in a first approximation, linear on $n$, the accumulated
number of (discrete) interaction events along the test-body trajectory. For a
nearly radial... | [
{
"created": "Thu, 14 Jun 2001 13:30:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"de Souza",
"Manoelito M.",
""
]
] | The dominant contributions from a discrete gravitational interaction produce the standard potential as an effective continuous field. The sub-dominant contributions are, in a first approximation, linear on $n$, the accumulated number of (discrete) interaction events along the test-body trajectory. For a nearly radial t... |
1410.6152 | She-Sheng Xue | She-Sheng Xue | How universe evolves with cosmological and gravitational constants | typo corrections, the final version to appear in Nucl. Phys. B
(2015). 24 pages and 6 figures | Nuclear Physics B897 (2015) 326 | 10.1016/j.nuclphysb.2015.05.022 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | With a basic varying space-time cutoff $\tilde\ell$, we study a regularized
and quantized Einstein-Cartan gravitational field theory and its domains of
ultraviolet-unstable fixed point $g_{\rm ir}\gtrsim 0$ and ultraviolet-stable
fixed point $g_{\rm uv}\approx 4/3$ of the gravitational gauge coupling
$g=(4/3)G/G_{\rm... | [
{
"created": "Tue, 21 Oct 2014 08:01:42 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Mar 2015 09:07:09 GMT",
"version": "v2"
},
{
"created": "Wed, 3 Jun 2015 16:13:04 GMT",
"version": "v3"
}
] | 2015-09-09 | [
[
"Xue",
"She-Sheng",
""
]
] | With a basic varying space-time cutoff $\tilde\ell$, we study a regularized and quantized Einstein-Cartan gravitational field theory and its domains of ultraviolet-unstable fixed point $g_{\rm ir}\gtrsim 0$ and ultraviolet-stable fixed point $g_{\rm uv}\approx 4/3$ of the gravitational gauge coupling $g=(4/3)G/G_{\rm N... |
1012.2560 | Bin Liu | Bin Liu, Yun-Chuan Dai, Xian-Ru Hu, Jian-Bo Deng | The Klein-Gordon equation in Machian model | 10 pages, accepted for publication in IJTP | null | 10.1007/s10773-011-0862-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The non-local Machian model is regarded as an alternative theory of
gravitation which states that all particles in the Universe as a
'gravitationally entangled' statistical ensemble. It is shown that the
Klein-Gordon equation can be derived within this Machian model of the universe.
The crucial point of the derivatio... | [
{
"created": "Sun, 12 Dec 2010 17:16:12 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jul 2011 12:32:20 GMT",
"version": "v2"
}
] | 2011-07-21 | [
[
"Liu",
"Bin",
""
],
[
"Dai",
"Yun-Chuan",
""
],
[
"Hu",
"Xian-Ru",
""
],
[
"Deng",
"Jian-Bo",
""
]
] | The non-local Machian model is regarded as an alternative theory of gravitation which states that all particles in the Universe as a 'gravitationally entangled' statistical ensemble. It is shown that the Klein-Gordon equation can be derived within this Machian model of the universe. The crucial point of the derivation ... |
0812.0272 | Madhavan Varadarajan | Madhavan Varadarajan | On the resolution of the big bang singularity in isotropic Loop Quantum
Cosmology | 26 pages, no figures | Class.Quant.Grav. 26 (2009) 085006 | 10.1088/0264-9381/26/8/085006 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In contrast to previous work in the field, we construct the Loop Quantum
Cosmology (LQC) of the flat isotropic model with a massless scalar field in the
absence of higher order curvature corrections to the gravitational part of the
Hamiltonian constraint. The matter part of the constraint contains the inverse
triad o... | [
{
"created": "Mon, 1 Dec 2008 11:56:49 GMT",
"version": "v1"
}
] | 2015-01-30 | [
[
"Varadarajan",
"Madhavan",
""
]
] | In contrast to previous work in the field, we construct the Loop Quantum Cosmology (LQC) of the flat isotropic model with a massless scalar field in the absence of higher order curvature corrections to the gravitational part of the Hamiltonian constraint. The matter part of the constraint contains the inverse triad ope... |
gr-qc/0005132 | A. A. Shatskiy , A. Yu. Andreev | A. A. Shatskiy, A. Yu. Andreev | Dynamics of the formation of an event horizon | 17 pages, 4 figures | Zh.Eksp.Teor.Fiz.116:353-368(1999) | null | null | gr-qc | null | The radial motion of matter in a centrally symmetric gravitational field in a
comoving reference frame is investigated for a realistic equation of state of
matter. The dynamics of the formation of an event horizon are investigated.
| [
{
"created": "Wed, 31 May 2000 11:53:45 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Oct 2000 08:07:29 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Oct 2000 08:54:29 GMT",
"version": "v3"
},
{
"created": "Wed, 8 Nov 2000 13:09:55 GMT",
"version": "v4"
},
{
"cre... | 2010-11-19 | [
[
"Shatskiy",
"A. A.",
""
],
[
"Andreev",
"A. Yu.",
""
]
] | The radial motion of matter in a centrally symmetric gravitational field in a comoving reference frame is investigated for a realistic equation of state of matter. The dynamics of the formation of an event horizon are investigated. |
gr-qc/0306040 | Ujjal Debnath | Subenoy Chakraborty, N.C.Chakraborty and Ujjal Debnath | Quintessence Problem and Brans-Dicke Theory | 6 Latex pages, No figure, Revtex style | Mod.Phys.Lett. A18 (2003) 1549-1556 | 10.1142/S0217732303009630 | null | gr-qc | null | It has been shown that Brans-Dicke (BD) theory in anisotropic cosmological
model can alone solve the quintessence problem and we have accelerated
expanding universe without any quintessence matter. Also the flatness problem
has been discussed in this context.
| [
{
"created": "Tue, 10 Jun 2003 12:01:34 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Chakraborty",
"Subenoy",
""
],
[
"Chakraborty",
"N. C.",
""
],
[
"Debnath",
"Ujjal",
""
]
] | It has been shown that Brans-Dicke (BD) theory in anisotropic cosmological model can alone solve the quintessence problem and we have accelerated expanding universe without any quintessence matter. Also the flatness problem has been discussed in this context. |
gr-qc/0402090 | Alexander Petrov Nikolaevich | A.N.Petrov | Perturbations in the Einstein theory of gravity: Conserved currents | LATEX, 8 pages | Moscow Univ.Phys.Bull. 59 (2004) 1:24-28;
Vestn.Mosk.Univ.Fiz.Astron. 1 (2004) 18-22 | null | null | gr-qc | null | General relativity in the form where gravitational perturbations together
with other physical fields propagate on an auxiliary background is considered.
With using the Katz-Bi{\v{c}}\'ak-Lynden-Bell technique new conserved currents,
divergences of antisymmetric tensor densities(superpotentials), in an arbitrary
curve... | [
{
"created": "Sun, 22 Feb 2004 09:26:19 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Petrov",
"A. N.",
""
]
] | General relativity in the form where gravitational perturbations together with other physical fields propagate on an auxiliary background is considered. With using the Katz-Bi{\v{c}}\'ak-Lynden-Bell technique new conserved currents, divergences of antisymmetric tensor densities(superpotentials), in an arbitrary curved ... |
1406.3201 | Jeroen Meidam | J. Meidam, M. Agathos, C. Van Den Broeck, J. Veitch, B.S.
Sathyaprakash | Testing the no-hair theorem with black hole ringdowns using TIGER | 11 pages, 20 figures. Matches version in PRD | Phys. Rev. D 90, 064009 (2014) | 10.1103/PhysRevD.90.064009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Einstein Telescope (ET), a proposed third-generation gravitational wave
observatory, would enable tests of the no-hair theorem by looking at the
characteristic frequencies and damping times of black hole ringdown signals. In
previous work it was shown that with a single $500 - 1000\,M_\odot$ black hole
at distanc... | [
{
"created": "Thu, 12 Jun 2014 11:47:26 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Sep 2014 15:44:17 GMT",
"version": "v2"
}
] | 2015-06-19 | [
[
"Meidam",
"J.",
""
],
[
"Agathos",
"M.",
""
],
[
"Broeck",
"C. Van Den",
""
],
[
"Veitch",
"J.",
""
],
[
"Sathyaprakash",
"B. S.",
""
]
] | The Einstein Telescope (ET), a proposed third-generation gravitational wave observatory, would enable tests of the no-hair theorem by looking at the characteristic frequencies and damping times of black hole ringdown signals. In previous work it was shown that with a single $500 - 1000\,M_\odot$ black hole at distance ... |
gr-qc/0304086 | Reinhard Meinel | G. Neugebauer and R. Meinel | Progress in relativistic gravitational theory using the inverse
scattering method | 31 pages, 5 figures, to appear in J. Math. Phys | J.Math.Phys.44:3407,2003 | 10.1063/1.1590419 | null | gr-qc hep-th math-ph math.MP | null | The increasing interest in compact astrophysical objects (neutron stars,
binaries, galactic black holes) has stimulated the search for rigorous methods,
which allow a systematic general relativistic description of such objects. This
paper is meant to demonstrate the use of the inverse scattering method, which
allows,... | [
{
"created": "Wed, 23 Apr 2003 08:23:25 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Neugebauer",
"G.",
""
],
[
"Meinel",
"R.",
""
]
] | The increasing interest in compact astrophysical objects (neutron stars, binaries, galactic black holes) has stimulated the search for rigorous methods, which allow a systematic general relativistic description of such objects. This paper is meant to demonstrate the use of the inverse scattering method, which allows, i... |
2407.07820 | Alexandra Eleni Koloniari | Alexandra E. Koloniari, Evdokia C. Koursoumpa, Paraskevi Nousi,
Paraskevas Lampropoulos, Nikolaos Passalis, Anastasios Tefas, Nikolaos
Stergioulas | New Gravitational Wave Discoveries Enabled by Machine Learning | 30 pages, 42 figures | null | null | null | gr-qc astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The detection of gravitational waves has revolutionized our understanding of
the universe, offering unprecedented insights into its dynamics. A major goal
of gravitational wave data analysis is to speed up the detection and parameter
estimation process using machine learning techniques, in light of an
anticipated sur... | [
{
"created": "Wed, 10 Jul 2024 16:44:08 GMT",
"version": "v1"
}
] | 2024-07-11 | [
[
"Koloniari",
"Alexandra E.",
""
],
[
"Koursoumpa",
"Evdokia C.",
""
],
[
"Nousi",
"Paraskevi",
""
],
[
"Lampropoulos",
"Paraskevas",
""
],
[
"Passalis",
"Nikolaos",
""
],
[
"Tefas",
"Anastasios",
""
],
[
"Stergioul... | The detection of gravitational waves has revolutionized our understanding of the universe, offering unprecedented insights into its dynamics. A major goal of gravitational wave data analysis is to speed up the detection and parameter estimation process using machine learning techniques, in light of an anticipated surge... |
gr-qc/9612038 | Alexander L. Gromov | Alexander Gromov (St-Petersburg State Thechnical University, Russia) | The Tolman-Bondi Model in the Ruban-Chernin Coordinates. 1. Equations
and Solutions | LaTeX,12 pages, submitted to New Astronomy | null | null | null | gr-qc | null | The Tolman-Bondi (TB) model is defined up to some transformation of a
co-moving coordinate but the transformation is not fixed. The use of an
arbitrary co-moving system of coordinates leads to the solution dependent on
three functions $f, F, {\bf F}$ which are chosen independently in applications.
The article studi... | [
{
"created": "Sun, 15 Dec 1996 17:22:20 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Mar 1997 21:24:12 GMT",
"version": "v2"
},
{
"created": "Wed, 7 May 1997 12:07:14 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Gromov",
"Alexander",
"",
"St-Petersburg State Thechnical University, Russia"
]
] | The Tolman-Bondi (TB) model is defined up to some transformation of a co-moving coordinate but the transformation is not fixed. The use of an arbitrary co-moving system of coordinates leads to the solution dependent on three functions $f, F, {\bf F}$ which are chosen independently in applications. The article studies t... |
gr-qc/0601023 | Soon-Tae Hong | Soon-Tae Hong | Warped products and black holes | 6 pages | Nuovo Cim. B120 (2005) 1227-1234 | 10.1393/ncb/i2005-10150-0 | null | gr-qc | null | We apply the warped product spacetime scheme to the
Banados-Teitelboim-Zanelli black holes and the Reissner-Nordstr\"om-anti-de
Sitter black hole to investigate their interior solutions in terms of warped
products. It is shown that there exist no discontinuities of the Ricci and
Einstein curvatures across event horiz... | [
{
"created": "Fri, 6 Jan 2006 05:23:10 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Hong",
"Soon-Tae",
""
]
] | We apply the warped product spacetime scheme to the Banados-Teitelboim-Zanelli black holes and the Reissner-Nordstr\"om-anti-de Sitter black hole to investigate their interior solutions in terms of warped products. It is shown that there exist no discontinuities of the Ricci and Einstein curvatures across event horizon... |
1903.07685 | Andrea Giusti | Roberto Casadio, Andrea Giugno, Andrea Giusti, Valerio Faraoni | Is de Sitter space always excluded in semiclassical f(R) gravity? | 9 pages, no figures | JCAP 1906 (2019) no.06, 005 | 10.1088/1475-7516/2019/06/005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is shown that the recent corpuscular description of gravity generically
excludes de Sitter spacetime in any semiclassical version of f(R) gravity. A
phantom phenomenology of the cosmic dynamics is also naturally excluded.
| [
{
"created": "Mon, 18 Mar 2019 19:28:39 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jun 2019 17:53:43 GMT",
"version": "v2"
}
] | 2019-06-19 | [
[
"Casadio",
"Roberto",
""
],
[
"Giugno",
"Andrea",
""
],
[
"Giusti",
"Andrea",
""
],
[
"Faraoni",
"Valerio",
""
]
] | It is shown that the recent corpuscular description of gravity generically excludes de Sitter spacetime in any semiclassical version of f(R) gravity. A phantom phenomenology of the cosmic dynamics is also naturally excluded. |
0708.2018 | Peter D'Eath | A.N.St.J.Farley, P.D.D'Eath | Quantum amplitudes in black-hole evaporation: coherent and squeezed
states | null | Class.Quant.Grav.24:105-127,2007 | 10.1088/0264-9381/24/1/006 | null | gr-qc | null | The quantum amplitude for processes involving the formation and evaporation
of black holes was previously calculated by means of a complex-time approach.
In that treatment, we followed Feynman's $+i\epsilon$ approach in quantum field
theory. The Lorentzian time interval $T$, measured at spatial infinity between
a pai... | [
{
"created": "Wed, 15 Aug 2007 09:54:42 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Farley",
"A. N. St. J.",
""
],
[
"D'Eath",
"P. D.",
""
]
] | The quantum amplitude for processes involving the formation and evaporation of black holes was previously calculated by means of a complex-time approach. In that treatment, we followed Feynman's $+i\epsilon$ approach in quantum field theory. The Lorentzian time interval $T$, measured at spatial infinity between a pair ... |
2011.06148 | Cosimo Bambi | Bakhtiyor Narzilloev, Javlon Rayimbaev, Sanjar Shaymatov, Ahmadjon
Abdujabbarov, Bobomurat Ahmedov, Cosimo Bambi | Dynamics of test particles around a Bardeen black hole surrounded by
perfect fluid dark matter | 17 pages, 16 figures. Accepted for publication in Phys. Rev. D | Phys. Rev. D 102, 104062 (2020) | 10.1103/PhysRevD.102.104062 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the dynamics of (i) neutral test particles, (ii) magnetically
charged test particles, and (iii) test magnetic dipole around a regular Bardeen
black hole surrounded by perfect fluid dark matter (PFDM). It has been shown
how the magnetic charge of the black hole and the parameter of the surrounding
PFDM can in... | [
{
"created": "Thu, 12 Nov 2020 01:16:46 GMT",
"version": "v1"
}
] | 2020-11-25 | [
[
"Narzilloev",
"Bakhtiyor",
""
],
[
"Rayimbaev",
"Javlon",
""
],
[
"Shaymatov",
"Sanjar",
""
],
[
"Abdujabbarov",
"Ahmadjon",
""
],
[
"Ahmedov",
"Bobomurat",
""
],
[
"Bambi",
"Cosimo",
""
]
] | We study the dynamics of (i) neutral test particles, (ii) magnetically charged test particles, and (iii) test magnetic dipole around a regular Bardeen black hole surrounded by perfect fluid dark matter (PFDM). It has been shown how the magnetic charge of the black hole and the parameter of the surrounding PFDM can infl... |
1909.11267 | Ling Sun | Ling Sun, Richard Brito, Maximiliano Isi | Search for ultralight bosons in Cygnus X-1 with Advanced LIGO | 9 pages, 4 figures; In the latest version, we integrated the changes
reported in the published erratum (DOI: 10.1103/PhysRevD.102.089902). A
missing coefficient when comparing the numerically estimated signal strain to
the strain upper limit is fixed. An alternative choice of the black hole age
and the correspo... | Phys. Rev. D 101, 063020 (2020) | 10.1103/PhysRevD.101.063020 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ultralight scalars, if they exist as theorized, could form clouds around
rapidly rotating black holes. Such clouds are expected to emit continuous,
quasimonochromatic gravitational waves that could be detected by LIGO and
Virgo. Here we present results of a directed search for such signals from the
Cygnus X-1 binary,... | [
{
"created": "Wed, 25 Sep 2019 03:20:21 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Mar 2020 19:38:30 GMT",
"version": "v2"
},
{
"created": "Tue, 27 Oct 2020 22:58:14 GMT",
"version": "v3"
}
] | 2020-10-29 | [
[
"Sun",
"Ling",
""
],
[
"Brito",
"Richard",
""
],
[
"Isi",
"Maximiliano",
""
]
] | Ultralight scalars, if they exist as theorized, could form clouds around rapidly rotating black holes. Such clouds are expected to emit continuous, quasimonochromatic gravitational waves that could be detected by LIGO and Virgo. Here we present results of a directed search for such signals from the Cygnus X-1 binary, u... |
gr-qc/0405020 | Ruth Lazkoz | Luis P. Chimento and Ruth Lazkoz | On big rip singularities | 8 pages | Mod.Phys.Lett. A19 (2004) 2479-2484 | 10.1142/S0217732304015646 | null | gr-qc | null | In this comment we discuss big rip singularities occurring in typical phantom
models by violation of the weak energy condition. After that, we compare them
with future late-time singularities arising in models where the scale factor
ends in a constant value and there is no violation of the strong energy
condition. In... | [
{
"created": "Wed, 5 May 2004 11:05:08 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Chimento",
"Luis P.",
""
],
[
"Lazkoz",
"Ruth",
""
]
] | In this comment we discuss big rip singularities occurring in typical phantom models by violation of the weak energy condition. After that, we compare them with future late-time singularities arising in models where the scale factor ends in a constant value and there is no violation of the strong energy condition. In p... |
gr-qc/9803082 | Saul A. Teukolsky | Saul A. Teukolsky | Irrotational Binary Neutron Stars in Quasiequilibrium in General
Relativity | 14 pages, AASTeX, accepted in ApJ. Simplified final form of equation
(eq. 52). Added Shibata ref | null | 10.1086/306082 | SAT-101 | gr-qc astro-ph | null | Neutron stars in binary orbit emit gravitational waves and spiral slowly
together. During this inspiral, they are expected to have very little
vorticity. It is in fact a good approximation to treat the system as having
zero vorticity, i.e., as irrotational. Because the orbital period is much
shorter than the radiatio... | [
{
"created": "Wed, 25 Mar 1998 18:43:35 GMT",
"version": "v1"
},
{
"created": "Mon, 4 May 1998 17:50:37 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Teukolsky",
"Saul A.",
""
]
] | Neutron stars in binary orbit emit gravitational waves and spiral slowly together. During this inspiral, they are expected to have very little vorticity. It is in fact a good approximation to treat the system as having zero vorticity, i.e., as irrotational. Because the orbital period is much shorter than the radiation ... |
gr-qc/9502022 | Sardanashvily Gennadi | G.Sardanashvily (Moscow State University) | Composite Spinor Bundles in Gravitation Theory | 26 pp, LaTeX file | null | null | TP\95\021 | gr-qc | null | In gravitation theory, the realistic fermion matter is described by spinor
bundles associated with the cotangent bundle of a world manifold $X$. In this
case, the Dirac operator can be introduced. There is the 1:1 correspondence
between these spinor bundles and the tetrad gravitational fields represented by
sections ... | [
{
"created": "Wed, 8 Feb 1995 07:12:06 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Sardanashvily",
"G.",
"",
"Moscow State University"
]
] | In gravitation theory, the realistic fermion matter is described by spinor bundles associated with the cotangent bundle of a world manifold $X$. In this case, the Dirac operator can be introduced. There is the 1:1 correspondence between these spinor bundles and the tetrad gravitational fields represented by sections of... |
2301.00639 | Abra\~ao Mendes | Gregory J. Galloway, Abra\~ao Mendes | Some rigidity results for compact initial data sets | 19 pages. All comments welcome. Small update | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we prove several rigidity results for compact initial data
sets, in both the boundary and no boundary cases. In particular, under natural
energy, boundary, and topological conditions, we obtain a global version of the
main result in [15]. We also obtain some extensions of results in [12]. A
number of e... | [
{
"created": "Mon, 2 Jan 2023 13:02:19 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Feb 2023 19:18:20 GMT",
"version": "v2"
}
] | 2023-02-03 | [
[
"Galloway",
"Gregory J.",
""
],
[
"Mendes",
"Abraão",
""
]
] | In this paper, we prove several rigidity results for compact initial data sets, in both the boundary and no boundary cases. In particular, under natural energy, boundary, and topological conditions, we obtain a global version of the main result in [15]. We also obtain some extensions of results in [12]. A number of exa... |
1911.11232 | Roger Hurtado M.Sc. | Roger A. Hurtado and Robel Arenas | Scalar-field potential for viable models in $f(R)$ theory | 20 pages, 8 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The $f(R)$ theory of gravity can be expressed as a scalar tensor theory with
a scalar degree of freedom $\phi$. By a conformal transformation, the action
and its Gibbons-York-Hawking boundary term are written in the Einstein frame
and the field equations are found. An effective potential is defined from part
of the t... | [
{
"created": "Mon, 25 Nov 2019 21:08:23 GMT",
"version": "v1"
}
] | 2019-11-27 | [
[
"Hurtado",
"Roger A.",
""
],
[
"Arenas",
"Robel",
""
]
] | The $f(R)$ theory of gravity can be expressed as a scalar tensor theory with a scalar degree of freedom $\phi$. By a conformal transformation, the action and its Gibbons-York-Hawking boundary term are written in the Einstein frame and the field equations are found. An effective potential is defined from part of the tra... |
gr-qc/9501019 | Hans-Juergen Schmidt | Hans - J\"urgen Schmidt | An alternate Hamiltonian formulation of fourth-order theories and its
application to cosmology | 29 pages, latex, no figures, hjschmi@rz.uni-potsdam.de | null | null | Uni Potsdam Math-94/12 | gr-qc | null | An alternate Hamiltonian H different from Ostrogradski's one is found for the
Lagrangian L = L(q, \dot q, \ddot q). We add a suitable divergence to L and
insert a=q and b=\ddot q. Contrary to other approaches no constraint is needed
because \ddot a = b is one of the canonical equations. Another canonical
equation bec... | [
{
"created": "Wed, 18 Jan 1995 11:19:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Schmidt",
"Hans - Jürgen",
""
]
] | An alternate Hamiltonian H different from Ostrogradski's one is found for the Lagrangian L = L(q, \dot q, \ddot q). We add a suitable divergence to L and insert a=q and b=\ddot q. Contrary to other approaches no constraint is needed because \ddot a = b is one of the canonical equations. Another canonical equation becom... |
gr-qc/9801082 | Toporenskij A. V. | A.Yu.Kamenshchik, I.M.Khalatnikov, A.V.Toporensky | Simplest cosmological model with the scalar field II. Influence of
cosmological constant | 12 pages with 2 gif figures and 2 eps figures, mprocl.sty, To appear
in International Journal of Modern Physics D | Int.J.Mod.Phys. D7 (1998) 129-138 | 10.1142/S0218271898000127 | null | gr-qc | null | Continuing the investigation of the simplest cosmological model with the
massive real scalar non-interacting inflaton field minimally coupled to gravity
we study an influence of the cosmological constant on the behaviour of
trajectories in closed minisuperspace Friedmann-Robertson-Walker model. The
transition from ch... | [
{
"created": "Fri, 23 Jan 1998 15:22:28 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Kamenshchik",
"A. Yu.",
""
],
[
"Khalatnikov",
"I. M.",
""
],
[
"Toporensky",
"A. V.",
""
]
] | Continuing the investigation of the simplest cosmological model with the massive real scalar non-interacting inflaton field minimally coupled to gravity we study an influence of the cosmological constant on the behaviour of trajectories in closed minisuperspace Friedmann-Robertson-Walker model. The transition from chao... |
gr-qc/0103078 | M. G. Jackson | Mark G. Jackson | Two Black Hole Holography, Lensing and Intensity | 10 pages | Phys.Rev. D64 (2001) 044020 | 10.1103/PhysRevD.64.044020 | CU-TP-1013 | gr-qc hep-th | null | We numerically verify the analysis of the "expanding horizon" theory of
Susskind in relation to the 't Hooft holographic conjecture. By using a
numerical simulation to work out the image formed by two black holes upon a
screen very far away, it is seen that it is impossible for a horizon to hide
behind another. We al... | [
{
"created": "Thu, 22 Mar 2001 10:18:39 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Sep 2001 04:36:03 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Jackson",
"Mark G.",
""
]
] | We numerically verify the analysis of the "expanding horizon" theory of Susskind in relation to the 't Hooft holographic conjecture. By using a numerical simulation to work out the image formed by two black holes upon a screen very far away, it is seen that it is impossible for a horizon to hide behind another. We also... |
1205.2365 | Ramon Herrera | Ramon Herrera and Marco Olivares | Warm-Logamediate inflationary universe model | 16 pages, 2 figures. Accepted for publication in IJMPD. arXiv admin
note: text overlap with arXiv:1108.1371 | null | 10.1142/S0218271812500472 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Warm inflationary universe models in the context of logamediate expansion are
studied. General conditions required for these models to be realizable and
discussed. This study is done in the weak and strong dissipative regimes. The
parameters of our models are constrained from the observational data.
| [
{
"created": "Thu, 10 May 2012 19:51:32 GMT",
"version": "v1"
}
] | 2015-06-05 | [
[
"Herrera",
"Ramon",
""
],
[
"Olivares",
"Marco",
""
]
] | Warm inflationary universe models in the context of logamediate expansion are studied. General conditions required for these models to be realizable and discussed. This study is done in the weak and strong dissipative regimes. The parameters of our models are constrained from the observational data. |
2107.08506 | Abhay Ashtekar | Abhay Ashtekar, Tommaso De Lorenzo, Marc Schneider | Probing the Big Bang with quantum fields | 38 pages; Three small clarifications added and minor typos corrected.
Version to appear in Advances in Mathematical and Theoretical Physics | Advances in Theoretical and Mathematical Physics, 25, 7, 1651-1702
(2021) | 10.4310/ATMP.2021.v25.n7.a1 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | By carrying out a systematic investigation of linear, test quantum fields
$\hat{\phi}(x)$ in cosmological space-times, we show that $\hat{\phi}(x)$
remain well-defined across the big bang as operator valued distributions in a
large class of Friedmann, Lema\^itre, Robertson, Walker space-times, including
radiation and... | [
{
"created": "Sun, 18 Jul 2021 18:00:03 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Oct 2021 15:40:28 GMT",
"version": "v2"
}
] | 2022-07-14 | [
[
"Ashtekar",
"Abhay",
""
],
[
"De Lorenzo",
"Tommaso",
""
],
[
"Schneider",
"Marc",
""
]
] | By carrying out a systematic investigation of linear, test quantum fields $\hat{\phi}(x)$ in cosmological space-times, we show that $\hat{\phi}(x)$ remain well-defined across the big bang as operator valued distributions in a large class of Friedmann, Lema\^itre, Robertson, Walker space-times, including radiation and d... |
0804.2327 | Miodrag Krmar | Vladan Pankovic, Simo Ciganovic, Rade Glavatovic | The Simplest Determination of the Thermodynamical Characteristics of
Kerr-Newman Black Hole | 5 pages, no figures | null | null | F-NS/02-08 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, generalizing our previous results, we determine in an original
and the simplest way three most important thermodynamical characteristics
(Bekenstein-Hawking entropy, Bekenstein quantization of the entropy or (outer)
horizon surface area and Hawking temperature) of Kerr-Newman black hole. We
start physic... | [
{
"created": "Tue, 15 Apr 2008 08:32:46 GMT",
"version": "v1"
}
] | 2008-04-16 | [
[
"Pankovic",
"Vladan",
""
],
[
"Ciganovic",
"Simo",
""
],
[
"Glavatovic",
"Rade",
""
]
] | In this work, generalizing our previous results, we determine in an original and the simplest way three most important thermodynamical characteristics (Bekenstein-Hawking entropy, Bekenstein quantization of the entropy or (outer) horizon surface area and Hawking temperature) of Kerr-Newman black hole. We start physical... |
1910.06350 | T. P. Singh | Tejinder P. Singh | Quantum gravity, minimum length, and holography | v2. 15 pages, one figure, title changed, introductory remarks added,
references updated, to appear in Pramana - Journal of Physics | Pramana - J. Phys. 95, 40 (2021) | 10.1007/s12043-020-02045-1 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Karolyhazy uncertainty relation is the statement that if a device is used
to measure a length $l$, there will be a minimum uncertainty $\delta l$ in the
measurement, given by $(\delta l)^3 \sim L_P^2\; l$. This is a consequence of
combining the principles of quantum mechanics and general relativity. In this
note ... | [
{
"created": "Mon, 14 Oct 2019 18:00:29 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Oct 2020 06:40:50 GMT",
"version": "v2"
}
] | 2021-03-03 | [
[
"Singh",
"Tejinder P.",
""
]
] | The Karolyhazy uncertainty relation is the statement that if a device is used to measure a length $l$, there will be a minimum uncertainty $\delta l$ in the measurement, given by $(\delta l)^3 \sim L_P^2\; l$. This is a consequence of combining the principles of quantum mechanics and general relativity. In this note we... |
1601.01055 | Jibitesh Dutta | Sourav Haldar, Jibitesh Dutta, Subenoy Chakraborty | A Comparative Study of Different Entropies in Fractal Universe | Revised throughly | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here we make an attempt to extend the idea of generalized Hawking temperature
and modified Bekenstein entropy at the event horizon in a fractal universe. The
modified Hawking temperature and Bekenstein entropy are considered in the
governing Friedmann equations, which is modified in the background of a fractal
univer... | [
{
"created": "Wed, 6 Jan 2016 02:34:08 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Dec 2016 09:19:45 GMT",
"version": "v2"
}
] | 2016-12-02 | [
[
"Haldar",
"Sourav",
""
],
[
"Dutta",
"Jibitesh",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | Here we make an attempt to extend the idea of generalized Hawking temperature and modified Bekenstein entropy at the event horizon in a fractal universe. The modified Hawking temperature and Bekenstein entropy are considered in the governing Friedmann equations, which is modified in the background of a fractal universe... |
1803.01712 | Muhammad Sharif | M. Sharif and Ayesha Ikram | Thermodynamics in $f(\mathcal{G},T)$ Gravity | 20 pages, 8 figures | Ad. High Energy Phys. 2018(2018)2563871 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper explores the non-equilibrium behavior of thermodynamics at the
apparent horizon of isotropic and homogeneous universe model in
$f(\mathcal{G},T)$ gravity ($\mathcal{G}$ and $T$ represent the Gauss-Bonnet
invariant and trace of the energy-momentum tensor, respectively). We construct
the corresponding field ... | [
{
"created": "Thu, 1 Mar 2018 09:36:31 GMT",
"version": "v1"
}
] | 2018-03-13 | [
[
"Sharif",
"M.",
""
],
[
"Ikram",
"Ayesha",
""
]
] | This paper explores the non-equilibrium behavior of thermodynamics at the apparent horizon of isotropic and homogeneous universe model in $f(\mathcal{G},T)$ gravity ($\mathcal{G}$ and $T$ represent the Gauss-Bonnet invariant and trace of the energy-momentum tensor, respectively). We construct the corresponding field eq... |
1311.6963 | Mustapha Azreg-A\"inou | Mustapha Azreg-A\"inou | Geometrothermodynamics: Comments, critics, and supports | 7 pages, no figures, more extended version: new equations added
(European Physical Journal C) | Eur. Phys. J. C (2014) 74:2930 | 10.1140/epjc/s10052-014-2930-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We write explicitly the Euler identity and the Gibbs-Duhem relation for
thermodynamic potentials that are not homogeneous first-order functions of
their natural extensive variables. We apply the rules to the theory of
geometrothermodynamics and show how the use of the natural extensive variables,
instead of the modif... | [
{
"created": "Wed, 27 Nov 2013 13:17:53 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Dec 2013 11:03:28 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Mar 2014 13:04:20 GMT",
"version": "v3"
},
{
"created": "Mon, 2 Jun 2014 07:09:43 GMT",
"version": "v4"
}
] | 2014-06-26 | [
[
"Azreg-Aïnou",
"Mustapha",
""
]
] | We write explicitly the Euler identity and the Gibbs-Duhem relation for thermodynamic potentials that are not homogeneous first-order functions of their natural extensive variables. We apply the rules to the theory of geometrothermodynamics and show how the use of the natural extensive variables, instead of the modifie... |
1806.04614 | Andreas Lymperis | Andreas Lymperis and Emmanuel N. Saridakis | Modified cosmology through nonextensive horizon thermodynamics | 11 pages, 4 figures | Eur.Phys.J. C78 (2018) no.12, 993 | 10.1140/epjc/s10052-018-6480-y | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct modified cosmological scenarios through the application of the
first law of thermodynamics in the universe horizon, but using the generalized,
nonextensive Tsallis entropy instead of the usual Bekenstein-Hawking one. We
result to modified cosmological equations that possess the usual ones as a
particular... | [
{
"created": "Tue, 12 Jun 2018 15:45:17 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Dec 2018 08:51:04 GMT",
"version": "v2"
}
] | 2018-12-07 | [
[
"Lymperis",
"Andreas",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | We construct modified cosmological scenarios through the application of the first law of thermodynamics in the universe horizon, but using the generalized, nonextensive Tsallis entropy instead of the usual Bekenstein-Hawking one. We result to modified cosmological equations that possess the usual ones as a particular l... |
1907.12049 | Qiming Fu | Qi-Ming Fu, Hao Yu, Li Zhao, and Yu-Xiao Liu | Thick brane in reduced Horndeski theory | null | Phys. Rev. D 100, 124057 (2019) | 10.1103/PhysRevD.100.124057 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Horndeski theory is the most general scalar-tensor theory retaining
second-order field equations, although the action includes higher-order terms.
This is achieved by a special choice of coupling constants. In this paper, we
investigate thick brane system in reduced Horndeski theory, especially the
effect of the non-... | [
{
"created": "Sun, 28 Jul 2019 09:06:19 GMT",
"version": "v1"
}
] | 2020-01-01 | [
[
"Fu",
"Qi-Ming",
""
],
[
"Yu",
"Hao",
""
],
[
"Zhao",
"Li",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | Horndeski theory is the most general scalar-tensor theory retaining second-order field equations, although the action includes higher-order terms. This is achieved by a special choice of coupling constants. In this paper, we investigate thick brane system in reduced Horndeski theory, especially the effect of the non-mi... |
gr-qc/9706074 | Roberto Casadio | Roberto Casadio, Fabio Finelli and Giovanni Venturi (Dipartimento di
Fisica, Universita' di Bologna and INFN, Bologna) | Adiabatic Invariant Treatment of a Collapsing Sphere of Quantized Dust | LaTeX, 16 pages, no figures, final version to appear in Class. and
Quantum Gravity | Class.Quant.Grav. 15 (1998) 2451-2464 | 10.1088/0264-9381/15/8/021 | null | gr-qc hep-th | null | The semiclassical collapse of a sphere of quantized dust is studied. A
Born-Oppenheimer decomposition is performed for the wave function of the system
and the semiclassical limit is considered for the gravitational part. The
method of adiabatic invariants for time dependent Hamiltonians is then employed
to find (appr... | [
{
"created": "Tue, 24 Jun 1997 10:10:32 GMT",
"version": "v1"
},
{
"created": "Tue, 19 May 1998 10:50:20 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Casadio",
"Roberto",
"",
"Dipartimento di\n Fisica, Universita' di Bologna and INFN, Bologna"
],
[
"Finelli",
"Fabio",
"",
"Dipartimento di\n Fisica, Universita' di Bologna and INFN, Bologna"
],
[
"Venturi",
"Giovanni",
"",
"Dipartimento di\n Fisica, Uni... | The semiclassical collapse of a sphere of quantized dust is studied. A Born-Oppenheimer decomposition is performed for the wave function of the system and the semiclassical limit is considered for the gravitational part. The method of adiabatic invariants for time dependent Hamiltonians is then employed to find (approx... |
gr-qc/0202023 | Remo Garattini | Remo Garattini | Can Reissner-Nordstr\"{o}m wormholes be considered for Spacetime Foam
formation? | 18 pages. RevTeX with package epsf and four eps figures. Submitted to
International Journal of Theoretical Physics, Group Theory and Nonlinear
Optics | Int.J.Theor.Phys.9:129,2002 | null | null | gr-qc hep-th | null | A simple model of spacetime foam, made by $N$ Reissner-Nordstr\"{o}m
wormholes with a magnetic and electric charge in a semiclassical approximation,
is taken under examination. The Casimir-like energy of the quantum fluctuation
of such a model is computed and compared with that one obtained with a foamy
space modeled... | [
{
"created": "Thu, 7 Feb 2002 11:56:49 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Garattini",
"Remo",
""
]
] | A simple model of spacetime foam, made by $N$ Reissner-Nordstr\"{o}m wormholes with a magnetic and electric charge in a semiclassical approximation, is taken under examination. The Casimir-like energy of the quantum fluctuation of such a model is computed and compared with that one obtained with a foamy space modeled b... |
0909.0459 | Jorge Pullin | Rodolfo Gambini, Jorge Pullin and Saeed Rastgoo | New variables for 1+1 dimensional gravity | 8 pages, no figures, added references, corrected some misleading
statements | Class.Quant.Grav.27:025002,2010 | 10.1088/0264-9381/27/2/025002 | LSU-REL-090209 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the canonical formulation of a generic action for
1+1-dimensional models of gravity coupled to matter admits a description in
terms of Ashtekar-type variables. This includes the CGHS model and spherically
symmetric reductions of 3+1 gravity as particular cases. This opens the
possibility of discussing mo... | [
{
"created": "Wed, 2 Sep 2009 15:37:11 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Sep 2009 15:44:06 GMT",
"version": "v2"
}
] | 2010-03-25 | [
[
"Gambini",
"Rodolfo",
""
],
[
"Pullin",
"Jorge",
""
],
[
"Rastgoo",
"Saeed",
""
]
] | We show that the canonical formulation of a generic action for 1+1-dimensional models of gravity coupled to matter admits a description in terms of Ashtekar-type variables. This includes the CGHS model and spherically symmetric reductions of 3+1 gravity as particular cases. This opens the possibility of discussing mode... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.