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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0804.2046 | Jan Ger\v{s}l | Jan Gersl | Bousso entropy bound for ideal gas of massive particles | 16 pages, 9 figures | Int.J.Mod.Phys.D18:763-779,2009 | 10.1142/S0218271809014741 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Bousso entropy bound is investigated for static spherically symmetric
configurations of ideal gas with Bose-Einstein and Fermi-Dirac distribution
function. Gas of massive particles is considered. The paper is continuation of
the previous work concerning the massless case. Special attention is devoted to
lightshee... | [
{
"created": "Sun, 13 Apr 2008 07:12:44 GMT",
"version": "v1"
}
] | 2009-07-22 | [
[
"Gersl",
"Jan",
""
]
] | The Bousso entropy bound is investigated for static spherically symmetric configurations of ideal gas with Bose-Einstein and Fermi-Dirac distribution function. Gas of massive particles is considered. The paper is continuation of the previous work concerning the massless case. Special attention is devoted to lightsheets... |
1001.2725 | Dionigi Benincasa Mr | Dionigi M. T. Benincasa, Fay Dowker | The Scalar Curvature of a Causal Set | Typo in definition of equation (3) and definition of n(x,y)
corrected. Note: published version still contains typo | Phys.Rev.Lett.104:181301,2010 | 10.1103/PhysRevLett.104.181301 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A one parameter family of retarded linear operators on scalar fields on
causal sets is introduced. When the causal set is well-approximated by 4
dimensional Minkowski spacetime, the operators are Lorentz invariant but
nonlocal, are parametrised by the scale of the nonlocality and approximate the
continuum scalar D'Al... | [
{
"created": "Fri, 15 Jan 2010 16:10:27 GMT",
"version": "v1"
},
{
"created": "Sat, 16 Jan 2010 12:57:31 GMT",
"version": "v2"
},
{
"created": "Fri, 7 May 2010 14:38:15 GMT",
"version": "v3"
},
{
"created": "Tue, 1 Nov 2011 14:47:28 GMT",
"version": "v4"
}
] | 2011-11-02 | [
[
"Benincasa",
"Dionigi M. T.",
""
],
[
"Dowker",
"Fay",
""
]
] | A one parameter family of retarded linear operators on scalar fields on causal sets is introduced. When the causal set is well-approximated by 4 dimensional Minkowski spacetime, the operators are Lorentz invariant but nonlocal, are parametrised by the scale of the nonlocality and approximate the continuum scalar D'Alem... |
2305.18528 | Marco Crisostomi | Marco Crisostomi, Kallol Dey, Enrico Barausse, Roberto Trotta | Neural Posterior Estimation with guaranteed exact coverage: the ringdown
of GW150914 | 9 pages, 2 figures, clarifications and references added, published
version | Phys. Rev. D 108, 044029 (2023) | 10.1103/PhysRevD.108.044029 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the ringdown phase of the first detected black-hole merger,
GW150914, using a simulation-based inference pipeline based on masked
autoregressive flows. We obtain approximate marginal posterior distributions
for the ringdown parameters, namely the mass, spin, and the amplitude and
phases of the dominant mod... | [
{
"created": "Mon, 29 May 2023 18:00:12 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Aug 2023 14:57:11 GMT",
"version": "v2"
}
] | 2023-08-17 | [
[
"Crisostomi",
"Marco",
""
],
[
"Dey",
"Kallol",
""
],
[
"Barausse",
"Enrico",
""
],
[
"Trotta",
"Roberto",
""
]
] | We analyze the ringdown phase of the first detected black-hole merger, GW150914, using a simulation-based inference pipeline based on masked autoregressive flows. We obtain approximate marginal posterior distributions for the ringdown parameters, namely the mass, spin, and the amplitude and phases of the dominant mode ... |
1310.1955 | Pablo Laguna | James Healy and Pablo Laguna | Critical Collapse of Scalar Fields Beyond Axisymmetry | 14 pages, 7 figures and 1 table, replaced with version accepted for
publication in GRG | null | 10.1007/s10714-014-1722-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate non-spherically symmetric, scalar field collapse of a family
of initial data consisting of a spherically symmetric profile with a
deformation proportional to the real part of the spherical harmonic
$Y_{21}(\theta,\varphi)$. Independent of the strength of the anisotropy in the
data, we find that supercr... | [
{
"created": "Mon, 7 Oct 2013 21:06:01 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Mar 2014 14:52:51 GMT",
"version": "v2"
}
] | 2014-03-31 | [
[
"Healy",
"James",
""
],
[
"Laguna",
"Pablo",
""
]
] | We investigate non-spherically symmetric, scalar field collapse of a family of initial data consisting of a spherically symmetric profile with a deformation proportional to the real part of the spherical harmonic $Y_{21}(\theta,\varphi)$. Independent of the strength of the anisotropy in the data, we find that supercrit... |
2206.12125 | Indrani Banerjee | Indrani Banerjee, Subhadip Sau and Soumitra SenGupta | Signatures of regular black holes from the shadow of Sgr A* and M87* | 23 pages, 9 figures, matches published version (JCAP accepted) | null | 10.1088/1475-7516/2022/09/066 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | With the recent release of the black hole image of Sgr A* alongside the
earlier image of M87*, one can now really hope to acquire a better
understanding of the gravitational physics at the horizon scale. In this paper,
we investigate the prospect of the regular black hole scenario with a Minkowski
core in explaining ... | [
{
"created": "Fri, 24 Jun 2022 07:41:14 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Sep 2022 16:04:11 GMT",
"version": "v2"
}
] | 2022-10-05 | [
[
"Banerjee",
"Indrani",
""
],
[
"Sau",
"Subhadip",
""
],
[
"SenGupta",
"Soumitra",
""
]
] | With the recent release of the black hole image of Sgr A* alongside the earlier image of M87*, one can now really hope to acquire a better understanding of the gravitational physics at the horizon scale. In this paper, we investigate the prospect of the regular black hole scenario with a Minkowski core in explaining th... |
1405.7219 | Sergey Chervon | Sergey V. Chervon, Sunil D. Maharaj, Aroonkumar Beesham ans Aleksandr
Kubasov | An Emergent Universe supported by chiral cosmological fields in
Einstein--Gauss--Bonnet gravity | 12 pages | null | 10.1134/S0202289314030074 | LGCA/5-2014 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose the application of the chiral cosmological model (CCM) for the
Einstein--Gauss--Bonnet (EGB) theory of gravitation with the aim of finding new
models of the Emergent Universe (EmU) scenario. We analysed the EmU supported
by two chiral cosmological fields for a spatially flat universe, while we have
used th... | [
{
"created": "Wed, 28 May 2014 12:42:44 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Chervon",
"Sergey V.",
""
],
[
"Maharaj",
"Sunil D.",
""
],
[
"Kubasov",
"Aroonkumar Beesham ans Aleksandr",
""
]
] | We propose the application of the chiral cosmological model (CCM) for the Einstein--Gauss--Bonnet (EGB) theory of gravitation with the aim of finding new models of the Emergent Universe (EmU) scenario. We analysed the EmU supported by two chiral cosmological fields for a spatially flat universe, while we have used thre... |
gr-qc/9904083 | Dieter Brill | Dieter Brill | Black Holes and Wormholes in 2+1 Dimensions | 37 pages Latex2e including 17 LaTeX figures. Submitted to Proceedings
of 2nd Samos Meeting on Cosmology Geometry and Relativity (Springer-Verlag)
Typos crrected, section 4.3 (Multiple Black Holes with Angular Momentum)
revised | null | null | AEI 110 | gr-qc | null | Vacuum Einstein theory in three spacetime dimensions is locally trivial, but
admits many solutions that are globally different, particularly if there is a
negative cosmological constant. The classical theory of such locally "anti-de
Sitter" spaces is treated in an elementary way, using visualizable models.
Among the ... | [
{
"created": "Fri, 30 Apr 1999 19:15:15 GMT",
"version": "v1"
},
{
"created": "Sat, 12 Jun 1999 20:11:00 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Brill",
"Dieter",
""
]
] | Vacuum Einstein theory in three spacetime dimensions is locally trivial, but admits many solutions that are globally different, particularly if there is a negative cosmological constant. The classical theory of such locally "anti-de Sitter" spaces is treated in an elementary way, using visualizable models. Among the ob... |
2012.06120 | Xiang-Hua Zhai | Hai-Feng Ding and Xiang-Hua Zhai | Examining the weak cosmic censorship conjecture by gedanken experiments
for an EMDA black hole | 13 pages, to appear in Mod. Phys. Lett. A | null | 10.1142/S0217732320503356 | null | gr-qc hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | In the framework of the new version of the gedanken experiments proposed by
Sorce and Wald, we investigate the weak cosmic censorship conjecture (WCCC) for
an Einstein-Maxwell-Dilaton-Axion (EMDA) black hole. Our result shows that no
violations of WCCC can occur with the increase of the background solution
parameters... | [
{
"created": "Fri, 11 Dec 2020 04:39:35 GMT",
"version": "v1"
}
] | 2021-02-03 | [
[
"Ding",
"Hai-Feng",
""
],
[
"Zhai",
"Xiang-Hua",
""
]
] | In the framework of the new version of the gedanken experiments proposed by Sorce and Wald, we investigate the weak cosmic censorship conjecture (WCCC) for an Einstein-Maxwell-Dilaton-Axion (EMDA) black hole. Our result shows that no violations of WCCC can occur with the increase of the background solution parameters f... |
gr-qc/0612093 | Jerzy Kowalski-Glikman | J. Kowalski-Glikman and A. Starodubtsev | Can we see gravitational collapse in (quantum) gravity perturbation
theory? | 23 pages | null | null | null | gr-qc | null | In this paper, by making use of the perturbative expansion around topological
field theory we are trying to understand why the standard perturbation theory
for General Relativity, which starts with linearized gravity does not see
gravitational collapse. We start with investigating classical equations of
motion. For z... | [
{
"created": "Thu, 14 Dec 2006 17:40:58 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kowalski-Glikman",
"J.",
""
],
[
"Starodubtsev",
"A.",
""
]
] | In this paper, by making use of the perturbative expansion around topological field theory we are trying to understand why the standard perturbation theory for General Relativity, which starts with linearized gravity does not see gravitational collapse. We start with investigating classical equations of motion. For zer... |
2109.08187 | Mohsen Fathi | V.H. C\'ardenas, Mohsen Fathi, Marco Olivares, J.R. Villanueva | Probing the parameters of a Schwarzschild black hole surrounded by
quintessence and cloud of strings through four standard astrophysical tests | 11 pages, 7 figures, to appear in EPJC | Eur. Phys. J. C (2021) 81:866 | 10.1140/epjc/s10052-021-09654-z | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we concern about applying general relativistic tests on the
spacetime produced by a static black hole associated with cloud of strings, in
a universe filled with quintessence. The four tests we apply are precession of
the perihelion in the planetary orbits, gravitational redshift, deflection of
light, ... | [
{
"created": "Thu, 16 Sep 2021 18:46:11 GMT",
"version": "v1"
}
] | 2021-10-05 | [
[
"Cárdenas",
"V. H.",
""
],
[
"Fathi",
"Mohsen",
""
],
[
"Olivares",
"Marco",
""
],
[
"Villanueva",
"J. R.",
""
]
] | In this paper, we concern about applying general relativistic tests on the spacetime produced by a static black hole associated with cloud of strings, in a universe filled with quintessence. The four tests we apply are precession of the perihelion in the planetary orbits, gravitational redshift, deflection of light, an... |
gr-qc/9304020 | Sam Finn | David F. Chernoff, Lee Samuel Finn | Gravitational Radiation, Inspiraling Binaries, and Cosmology | 13 pages (plus 1 figure), LaTeX/aasms, NU-GR-4 | Astrophys.J. 411 (1993) L5-L8 | 10.1086/186898 | null | gr-qc astro-ph | null | We show how to measure cosmological parameters using observations of
inspiraling binary neutron star or black hole systems in one or more
gravitational wave detectors. To illustrate, we focus on the case of fixed mass
binary systems observed in a single Laser Interferometer Gravitational-wave
Observatory (LIGO)-like ... | [
{
"created": "Thu, 15 Apr 1993 20:52:56 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Chernoff",
"David F.",
""
],
[
"Finn",
"Lee Samuel",
""
]
] | We show how to measure cosmological parameters using observations of inspiraling binary neutron star or black hole systems in one or more gravitational wave detectors. To illustrate, we focus on the case of fixed mass binary systems observed in a single Laser Interferometer Gravitational-wave Observatory (LIGO)-like de... |
2301.03883 | Mohsen Khodadi | Mohsen Khodadi, Marco Schreck | Hubble tension as a guide for refining the early Universe: Cosmologies
with explicit local Lorentz and diffeomorphism violation | 14 pages (two columns) | Phys.Dark Univ. 39 (2023) 101170 | 10.1016/j.dark.2023.101170 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is dedicated to assessing modified cosmological settings based on
the gravitational Standard-Model Extension (SME). Our analysis rests upon the
Hubble tension (HT), which is a discrepancy between the observational
determination of the Hubble parameter via data from the Cosmic Microwave
Background (CMB) and... | [
{
"created": "Tue, 10 Jan 2023 10:10:56 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Jan 2023 18:47:16 GMT",
"version": "v2"
}
] | 2023-01-18 | [
[
"Khodadi",
"Mohsen",
""
],
[
"Schreck",
"Marco",
""
]
] | This paper is dedicated to assessing modified cosmological settings based on the gravitational Standard-Model Extension (SME). Our analysis rests upon the Hubble tension (HT), which is a discrepancy between the observational determination of the Hubble parameter via data from the Cosmic Microwave Background (CMB) and T... |
1511.02634 | Carolina Benone | Carolina L. Benone, Lu\'is C. B. Crispino | Superradiance in static black hole spacetimes | null | null | 10.1103/PhysRevD.93.024028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the absorption of a massive and charged scalar field in a
Reissner-Nordstr\"om background. We compare our numerical results for the
absorption cross section, obtained for arbitrary frequencies, with the low- and
high-frequency limits. We find, in particular, that the total absorption cross
section can ... | [
{
"created": "Mon, 9 Nov 2015 11:04:53 GMT",
"version": "v1"
}
] | 2016-02-17 | [
[
"Benone",
"Carolina L.",
""
],
[
"Crispino",
"Luís C. B.",
""
]
] | We investigate the absorption of a massive and charged scalar field in a Reissner-Nordstr\"om background. We compare our numerical results for the absorption cross section, obtained for arbitrary frequencies, with the low- and high-frequency limits. We find, in particular, that the total absorption cross section can be... |
2102.12028 | Woei Chet Lim | Muhammad Zubair Ali Moughal and Woei Chet Lim | Cylindrical spikes | 25 pages, 13 figures. Abridged version of arXiv:2102.09776. Accepted
by CQG | Class. Quantum Grav. 38 (2021) 075029 | 10.1088/1361-6382/abe755 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The Geroch/Stephani transformation is a solution-generating transformation,
and may generate spiky solutions. The spikes in solutions generated so far are
either early-time permanent spikes or transient spikes. We want to generate a
solution with a late-time permanent spike. We achieve this by applying
Stephani's tra... | [
{
"created": "Wed, 24 Feb 2021 02:27:04 GMT",
"version": "v1"
}
] | 2021-03-18 | [
[
"Moughal",
"Muhammad Zubair Ali",
""
],
[
"Lim",
"Woei Chet",
""
]
] | The Geroch/Stephani transformation is a solution-generating transformation, and may generate spiky solutions. The spikes in solutions generated so far are either early-time permanent spikes or transient spikes. We want to generate a solution with a late-time permanent spike. We achieve this by applying Stephani's trans... |
1402.2323 | Maite Dupuis | Valentin Bonzom, Mait\'e Dupuis, Florian Girelli and Etera R. Livine | Deformed phase space for 3d loop gravity and hyperbolic discrete
geometries | 30 pages, 12 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We revisit the loop gravity space phase for 3D Riemannian gravity by
algebraically constructing the phase space
$T^*\mathrm{SU}(2)\sim\mathrm{ISO}(3)$ as the Heisenberg double of the Lie
group $\mathrm{SO}(3)$ provided with the trivial cocyle. Tackling the issue of
accounting for a non-vanishing cosmological constrai... | [
{
"created": "Mon, 10 Feb 2014 22:52:19 GMT",
"version": "v1"
}
] | 2014-02-12 | [
[
"Bonzom",
"Valentin",
""
],
[
"Dupuis",
"Maité",
""
],
[
"Girelli",
"Florian",
""
],
[
"Livine",
"Etera R.",
""
]
] | We revisit the loop gravity space phase for 3D Riemannian gravity by algebraically constructing the phase space $T^*\mathrm{SU}(2)\sim\mathrm{ISO}(3)$ as the Heisenberg double of the Lie group $\mathrm{SO}(3)$ provided with the trivial cocyle. Tackling the issue of accounting for a non-vanishing cosmological constraint... |
gr-qc/0503019 | Chris Doran | Chris Doran, Anthony Lasenby, Sam Dolan and Ian Hinder | Fermion absorption cross section of a Schwarzschild black hole | 11 pages, 3 figures | Phys.Rev. D71 (2005) 124020 | 10.1103/PhysRevD.71.124020 | null | gr-qc astro-ph | null | We study the absorption of massive spin-half particles by a small
Schwarzschild black hole by numerically solving the single-particle Dirac
equation in Painleve-Gullstrand coordinates. We calculate the absorption cross
section for a range of gravitational couplings Mm/m_P^2 and incident particle
energies E. At high c... | [
{
"created": "Fri, 4 Mar 2005 16:55:12 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Doran",
"Chris",
""
],
[
"Lasenby",
"Anthony",
""
],
[
"Dolan",
"Sam",
""
],
[
"Hinder",
"Ian",
""
]
] | We study the absorption of massive spin-half particles by a small Schwarzschild black hole by numerically solving the single-particle Dirac equation in Painleve-Gullstrand coordinates. We calculate the absorption cross section for a range of gravitational couplings Mm/m_P^2 and incident particle energies E. At high cou... |
2001.11807 | Etera R. Livine | Jibril Ben Achour, Etera R. Livine | Conformal structure of FLRW Cosmology: Spinorial representation and the
so(3,2) algebra of observables | 30 pages, minor revision in JHEP published version plus
acknowledgments | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was recently shown that the homogeneous and isotropic cosmology of a
massless scalar field coupled to general relativity exhibits a new hidden
conformal invariance under Mobius transformation of the proper time,
additionally to the invariance under time-reparamterization. The resulting
Noether charges form a $sl(2... | [
{
"created": "Fri, 31 Jan 2020 13:02:39 GMT",
"version": "v1"
},
{
"created": "Thu, 27 Feb 2020 08:06:18 GMT",
"version": "v2"
}
] | 2020-02-28 | [
[
"Achour",
"Jibril Ben",
""
],
[
"Livine",
"Etera R.",
""
]
] | It was recently shown that the homogeneous and isotropic cosmology of a massless scalar field coupled to general relativity exhibits a new hidden conformal invariance under Mobius transformation of the proper time, additionally to the invariance under time-reparamterization. The resulting Noether charges form a $sl(2,\... |
1001.2959 | Babak Vakili | Babak Vakili | Noether symmetric minisuperspace model of $f(R)$ cosmology | 5 pages, Talk given at "The Grassmannian Conference in Fundamental
Cosmology (Grasscosmofun'09)", Szczecin, Poland, 14-19th September 2009 | Ann. Phys. (Berlin) 19 (2010) 359 | 10.1002/andp.201010447 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the metric $f(R)$ cosmology using Noether symmetry approach by
utilizing the behavior of the corresponding Lagrangian under infinitesimal
generators of the desired symmetry. The existence of Noether symmetry of the
cosmological $f(R)$ minisuperspace helps us to find out the form of $f(R)$
function for which ... | [
{
"created": "Mon, 18 Jan 2010 06:24:45 GMT",
"version": "v1"
}
] | 2015-05-18 | [
[
"Vakili",
"Babak",
""
]
] | We study the metric $f(R)$ cosmology using Noether symmetry approach by utilizing the behavior of the corresponding Lagrangian under infinitesimal generators of the desired symmetry. The existence of Noether symmetry of the cosmological $f(R)$ minisuperspace helps us to find out the form of $f(R)$ function for which su... |
gr-qc/0312016 | Stefan Danilishin | S. L. Danilishin | Sensitivity limitations in optical speed meter topology of
gravitational-wave antennae | 20 pages, 12 figures | Phys.Rev. D69 (2004) 102003 | 10.1103/PhysRevD.69.102003 | null | gr-qc | null | The possible design of QND gravitational-wave detector based on speed meter
principle is considered with respect to optical losses. The detailed analysis
of speed meter interferometer is performed and the ultimate sensitivity that
can be achieved is calculated. It is shown that unlike the position meter
signal-recycl... | [
{
"created": "Tue, 2 Dec 2003 18:53:46 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Danilishin",
"S. L.",
""
]
] | The possible design of QND gravitational-wave detector based on speed meter principle is considered with respect to optical losses. The detailed analysis of speed meter interferometer is performed and the ultimate sensitivity that can be achieved is calculated. It is shown that unlike the position meter signal-recyclin... |
2207.08062 | Nader Inan | NA Inan, JJ Thompson, RY Chiao | Interaction of Gravitational Waves with Superconductors | null | Fortschritte der Physik, 2016 | 10.1002/prop.201600066 | null | gr-qc cond-mat.supr-con | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Applying the Helmholtz Decomposition theorem to linearized General Relativity
leads to a gauge-invariant formulation where the transverse-traceless part of
the metric perturbation describes gravitational waves in matter. Gravitational
waves incident on a superconductor can be described by a linear London-like
constit... | [
{
"created": "Sun, 17 Jul 2022 03:09:53 GMT",
"version": "v1"
}
] | 2022-07-19 | [
[
"Inan",
"NA",
""
],
[
"Thompson",
"JJ",
""
],
[
"Chiao",
"RY",
""
]
] | Applying the Helmholtz Decomposition theorem to linearized General Relativity leads to a gauge-invariant formulation where the transverse-traceless part of the metric perturbation describes gravitational waves in matter. Gravitational waves incident on a superconductor can be described by a linear London-like constitue... |
2302.02090 | Zhi-Bang Yao | Zhi-Bang Yao, Michele Oliosi, Xian Gao and Shinji Mukohyama | Minimally modified gravity with auxiliary constraints formalism | 15 pages, 1 table, no figure | null | 10.1103/PhysRevD.107.104052 | YITP-23-09, IPMU23-0003 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the possibility of reducing the number of degrees of freedom
(d.o.f.) starting from generic metric theories of gravity by introducing
multiple auxiliary constraints (ACs), under the restriction of retaining
spatial covariance as a gauge symmetry. Arbitrary numbers of scalar-, vector-
and tensor-type AC... | [
{
"created": "Sat, 4 Feb 2023 04:39:05 GMT",
"version": "v1"
},
{
"created": "Tue, 30 May 2023 16:24:33 GMT",
"version": "v2"
}
] | 2023-05-31 | [
[
"Yao",
"Zhi-Bang",
""
],
[
"Oliosi",
"Michele",
""
],
[
"Gao",
"Xian",
""
],
[
"Mukohyama",
"Shinji",
""
]
] | We investigate the possibility of reducing the number of degrees of freedom (d.o.f.) starting from generic metric theories of gravity by introducing multiple auxiliary constraints (ACs), under the restriction of retaining spatial covariance as a gauge symmetry. Arbitrary numbers of scalar-, vector- and tensor-type ACs ... |
gr-qc/0105042 | Edward Malec | Janusz Karkowski, Edward Malec and Zdobys{\l}aw \'Swierczy\'nski | Backscattering of electromagnetic and gravitational waves off
Schwarzschild geometry | 8 pages, 2 figures | Class.Quant.Grav. 19 (2002) 953-966 | 10.1088/0264-9381/19/5/308 | null | gr-qc | null | Major changes in Sec. II (with much stronger estimates), minor changes in
remaining sections, a new title. Deleted Appendix, added 2 new references.
| [
{
"created": "Fri, 11 May 2001 17:25:03 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Oct 2001 06:47:12 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Karkowski",
"Janusz",
""
],
[
"Malec",
"Edward",
""
],
[
"Świerczyński",
"Zdobysław",
""
]
] | Major changes in Sec. II (with much stronger estimates), minor changes in remaining sections, a new title. Deleted Appendix, added 2 new references. |
gr-qc/9903045 | Carlo Rovelli | Carlo Rovelli | Quantum spacetime: what do we know? | To appear on: "Physics Meets Philosophy at the Planck scale", C
Callender N Hugget eds, Cambridge University Press | null | null | null | gr-qc hep-th | null | This is a contribution to a book on quantum gravity and philosophy. I discuss
nature and origin of the problem of quantum gravity. I examine the knowledge
that may guide us in addressing this problem, and the reliability of such
knowledge. In particular, I discuss the subtle modification of the notions of
space and t... | [
{
"created": "Fri, 12 Mar 1999 15:05:25 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rovelli",
"Carlo",
""
]
] | This is a contribution to a book on quantum gravity and philosophy. I discuss nature and origin of the problem of quantum gravity. I examine the knowledge that may guide us in addressing this problem, and the reliability of such knowledge. In particular, I discuss the subtle modification of the notions of space and tim... |
1003.2014 | Johan Brannlund | Johan Brannlund, Robert van den Hoogen, Alan Coley | Averaging geometrical objects on a differentiable manifold | null | null | 10.1142/S0218271810018062 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a framework within which a mathematically precise, fully
covariant, and exact averaging procedure for tensor fields on a manifold can be
formulated. In particular, we introduce the Weitzenb\"ock connection for
parallel transport and argue that, within the context of averaging, frames and
connections are ... | [
{
"created": "Wed, 10 Mar 2010 03:04:47 GMT",
"version": "v1"
}
] | 2015-05-18 | [
[
"Brannlund",
"Johan",
""
],
[
"Hoogen",
"Robert van den",
""
],
[
"Coley",
"Alan",
""
]
] | We construct a framework within which a mathematically precise, fully covariant, and exact averaging procedure for tensor fields on a manifold can be formulated. In particular, we introduce the Weitzenb\"ock connection for parallel transport and argue that, within the context of averaging, frames and connections are th... |
2311.14803 | Andrea Maselli | Andrea Maselli, Sophia Yi, Lorenzo Pierini, Vania Vellucci, Luca
Reali, Leonardo Gualtieri, Emanuele Berti | Black hole spectroscopy beyond Kerr: agnostic and theory-based tests
with next-generation interferometers | references updated | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole spectroscopy is a clean and powerful tool to test gravity in the
strong-field regime and to probe the nature of compact objects. Next-generation
ground-based detectors, such as the Einstein Telescope and Cosmic Explorer,
will observe thousands of binary black hole mergers with large signal-to-noise
ratios,... | [
{
"created": "Fri, 24 Nov 2023 19:00:03 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Feb 2024 15:37:34 GMT",
"version": "v2"
},
{
"created": "Fri, 15 Mar 2024 06:12:11 GMT",
"version": "v3"
}
] | 2024-03-18 | [
[
"Maselli",
"Andrea",
""
],
[
"Yi",
"Sophia",
""
],
[
"Pierini",
"Lorenzo",
""
],
[
"Vellucci",
"Vania",
""
],
[
"Reali",
"Luca",
""
],
[
"Gualtieri",
"Leonardo",
""
],
[
"Berti",
"Emanuele",
""
]
] | Black hole spectroscopy is a clean and powerful tool to test gravity in the strong-field regime and to probe the nature of compact objects. Next-generation ground-based detectors, such as the Einstein Telescope and Cosmic Explorer, will observe thousands of binary black hole mergers with large signal-to-noise ratios, a... |
0903.0264 | Carlos A. R. Herdeiro | Miguel S. Costa, Carlos A.R. Herdeiro and Carmen Rebelo | Dynamical and Thermodynamical Aspects of Interacting Kerr Black Holes | 15 pages, 24 figures | Phys.Rev.D79:123508,2009 | 10.1103/PhysRevD.79.123508 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the asymptotically flat double-Kerr solution for two equal mass
black holes with either the same or opposite angular momentum and with a
massless strut between them. For fixed angular momentum and mass, the angular
velocity of two co-rotating Kerr black holes decreases as they approach one
another, from t... | [
{
"created": "Mon, 2 Mar 2009 11:27:56 GMT",
"version": "v1"
}
] | 2009-07-09 | [
[
"Costa",
"Miguel S.",
""
],
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Rebelo",
"Carmen",
""
]
] | We consider the asymptotically flat double-Kerr solution for two equal mass black holes with either the same or opposite angular momentum and with a massless strut between them. For fixed angular momentum and mass, the angular velocity of two co-rotating Kerr black holes decreases as they approach one another, from the... |
2106.09438 | Jaakko Annala | Jaakko Annala | Higgs inflation and higher-order gravity in Palatini formulation | 70 pages, Master's Thesis, Corrected typos | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study how higher-order gravity affects Higgs inflation in the Palatini
formulation. We first review the metric and Palatini formulations in
comparative manner and discuss their differences. Next cosmic inflation driven
by a scalar field and inflationary observables are discussed. After this we
review the Higgs inf... | [
{
"created": "Thu, 17 Jun 2021 12:38:37 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Jun 2021 22:38:30 GMT",
"version": "v2"
}
] | 2021-06-28 | [
[
"Annala",
"Jaakko",
""
]
] | We study how higher-order gravity affects Higgs inflation in the Palatini formulation. We first review the metric and Palatini formulations in comparative manner and discuss their differences. Next cosmic inflation driven by a scalar field and inflationary observables are discussed. After this we review the Higgs infla... |
2104.06902 | Hongguang Liu | Muxin Han and Hongguang Liu | Analytic Continuation of Spin foam Models | 33 pages; This paper summarizes the results announced at Loops'19
Conference http://gravity.psu.edu/events/loops19/index-loops19.shtml | null | 10.1103/PhysRevD.105.024012 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Lorentzian Engle-Pereira-Rovelli-Livine/Freidel-Krasnov (EPRL/FK)
spinfoam model and the Conrady-Hnybida (CH) timelike-surface extension can be
expressed in the integral form $\int e^S$. This work studies the analytic
continuation of the spinfoam action $S$ to the complexification of the
integration domain. Our w... | [
{
"created": "Wed, 14 Apr 2021 14:49:01 GMT",
"version": "v1"
}
] | 2022-01-19 | [
[
"Han",
"Muxin",
""
],
[
"Liu",
"Hongguang",
""
]
] | The Lorentzian Engle-Pereira-Rovelli-Livine/Freidel-Krasnov (EPRL/FK) spinfoam model and the Conrady-Hnybida (CH) timelike-surface extension can be expressed in the integral form $\int e^S$. This work studies the analytic continuation of the spinfoam action $S$ to the complexification of the integration domain. Our wor... |
1411.4329 | Sergey Paston | S.A. Paston | Hawking into Unruh mapping for embeddings of hyperbolic type | LaTeX, 13 pages, in this version small corrections made | Class. Quantum Grav. 32 (2015) 145009 | 10.1088/0264-9381/32/14/145009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the conditions of the existence of Hawking into Unruh mapping for
hyperbolic (Fronsdal-type) embeddings of metric into the Minkowski space, for
which timelines are hyperbolas. Many examples are known for global embeddings
into the Minkowskian spacetime (GEMS) with such mapping for physically
interesting metr... | [
{
"created": "Sun, 16 Nov 2014 23:40:06 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Sep 2015 13:27:14 GMT",
"version": "v2"
}
] | 2015-09-07 | [
[
"Paston",
"S. A.",
""
]
] | We study the conditions of the existence of Hawking into Unruh mapping for hyperbolic (Fronsdal-type) embeddings of metric into the Minkowski space, for which timelines are hyperbolas. Many examples are known for global embeddings into the Minkowskian spacetime (GEMS) with such mapping for physically interesting metric... |
gr-qc/0206065 | John Quiroga H. | John Quiroga Hurtado, Yulia A. Shaido | Quantum stabilization of dilatonic Anti-de Sitter Universe | 5 pages, LaTeX, no figures. Corrected typos. Minor corrections,
version to appear in G@C | Grav.Cosmol. 8 (2002) 294-298 | null | null | gr-qc hep-th | null | The possibility of quantum creation of a dilatonic AdS Universe is
discussed.Without dilaton it is known that quantum effects lead to the
annihilation of AdS Universe. We consider the role of the form for the
dilatonic potential in the quantum creation of a dilatonic AdS Universe. Using
the conformal anomaly for dila... | [
{
"created": "Fri, 21 Jun 2002 16:30:44 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Feb 2003 09:59:22 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Hurtado",
"John Quiroga",
""
],
[
"Shaido",
"Yulia A.",
""
]
] | The possibility of quantum creation of a dilatonic AdS Universe is discussed.Without dilaton it is known that quantum effects lead to the annihilation of AdS Universe. We consider the role of the form for the dilatonic potential in the quantum creation of a dilatonic AdS Universe. Using the conformal anomaly for dilato... |
1103.1713 | Douglas A. Singleton | Michael Duncan, Ratbay Myrzakulov, and Douglas Singleton | Entropic derivation of F=ma for circular motion | 8 pages and no figures, added discussion and references. To be
published in PLB | Phys.Lett.B703:516-518,2011 | 10.1016/j.physletb.2011.08.027 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine the entropic picture of Newton's second law for the case of
circular motion. It is shown that one must make modifications to the derivation
of F=ma due to a change in the effective Unruh temperature for circular motion.
These modifications present a challenge to the entropic derivation of Newton's
second l... | [
{
"created": "Wed, 9 Mar 2011 06:50:08 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Aug 2011 06:41:24 GMT",
"version": "v2"
}
] | 2011-09-12 | [
[
"Duncan",
"Michael",
""
],
[
"Myrzakulov",
"Ratbay",
""
],
[
"Singleton",
"Douglas",
""
]
] | We examine the entropic picture of Newton's second law for the case of circular motion. It is shown that one must make modifications to the derivation of F=ma due to a change in the effective Unruh temperature for circular motion. These modifications present a challenge to the entropic derivation of Newton's second law... |
2201.04552 | Yong Cai | Yong Cai, Yun-Song Piao | Generating enhanced primordial GWs during inflation with intermittent
violation of NEC and diminishment of GW propagating speed | 28 pages, 11 figures; two typos were corrected | JHEP06(2022)067 | 10.1007/JHEP06(2022)067 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We investigate both the null energy condition (NEC) violating scenario and
the $c_T$-diminishing scenario for generating enhanced power spectrum of
primordial gravitational waves (GWs) during inflation, where $c_T$ is the
propagating speed of primordial GWs. Both of these two scenarios can be
realized stably with the... | [
{
"created": "Wed, 12 Jan 2022 16:48:30 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jun 2022 07:12:24 GMT",
"version": "v2"
},
{
"created": "Mon, 27 Jun 2022 08:16:37 GMT",
"version": "v3"
},
{
"created": "Sun, 4 Aug 2024 08:03:41 GMT",
"version": "v4"
}
] | 2024-08-06 | [
[
"Cai",
"Yong",
""
],
[
"Piao",
"Yun-Song",
""
]
] | We investigate both the null energy condition (NEC) violating scenario and the $c_T$-diminishing scenario for generating enhanced power spectrum of primordial gravitational waves (GWs) during inflation, where $c_T$ is the propagating speed of primordial GWs. Both of these two scenarios can be realized stably with theor... |
gr-qc/9803075 | Matt Choptuik | M.W. Choptuik | The (Unstable) Threshold of Black Hole Formation | 19 pages, Latex, crckapb.sty, 8 figures included using epsf, talk
given at GR15, Pune, India, to appear in the proceedings | null | null | null | gr-qc | null | In recent years it has become apparent that intriguing phenomenology exists
at the threshold of black hole formation in a large class of general
relativistic collapse models. This phenomenology, which includes scaling,
self-similarity and universality, is largely analogous to statistical
mechanical critical behaviour... | [
{
"created": "Mon, 23 Mar 1998 04:27:53 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Choptuik",
"M. W.",
""
]
] | In recent years it has become apparent that intriguing phenomenology exists at the threshold of black hole formation in a large class of general relativistic collapse models. This phenomenology, which includes scaling, self-similarity and universality, is largely analogous to statistical mechanical critical behaviour, ... |
0910.3197 | Carlos O. Lousto | Carlos O. Lousto, Hiroyuki Nakano, Yosef Zlochower, Manuela Campanelli | Statistical studies of Spinning Black-Hole Binaries | 22 pages, 28 figures, abridged abstract. Major addenda in section IV
and discussion | Phys.Rev.D81:084023,2010; Erratum-ibid.D82:129902,2010 | 10.1103/PhysRevD.81.084023 10.1103/PhysRevD.82.129902 | null | gr-qc astro-ph.CO astro-ph.GA astro-ph.HE astro-ph.SR hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the statistical distributions of the spins of generic black-hole
binaries during the inspiral and merger, as well as the distributions of the
remnant mass, spin, and recoil velocity. For the inspiral regime, we start with
a random uniform distribution of spin directions S1 and S2 and magnitudes
S1=S2=0.97 fo... | [
{
"created": "Fri, 16 Oct 2009 19:36:12 GMT",
"version": "v1"
},
{
"created": "Sun, 18 Oct 2009 17:17:57 GMT",
"version": "v2"
},
{
"created": "Fri, 11 Dec 2009 15:13:37 GMT",
"version": "v3"
},
{
"created": "Thu, 21 Jan 2010 19:49:48 GMT",
"version": "v4"
}
] | 2010-12-24 | [
[
"Lousto",
"Carlos O.",
""
],
[
"Nakano",
"Hiroyuki",
""
],
[
"Zlochower",
"Yosef",
""
],
[
"Campanelli",
"Manuela",
""
]
] | We study the statistical distributions of the spins of generic black-hole binaries during the inspiral and merger, as well as the distributions of the remnant mass, spin, and recoil velocity. For the inspiral regime, we start with a random uniform distribution of spin directions S1 and S2 and magnitudes S1=S2=0.97 for ... |
gr-qc/0611124 | Asher Yahalom PhD | Asher Yahalom | Gravity and Faster than Light Particles | 10 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper I discuss whether superluminal particles exist in the general
relativistic theory of gravity. It seems that the answer to this question is
negative. In truth the result may only represent a difficulty to {\bf special}
but not general relativity, the later allowing both Lorentzian and Euclidian
metrics. ... | [
{
"created": "Fri, 24 Nov 2006 11:03:07 GMT",
"version": "v1"
},
{
"created": "Wed, 4 Apr 2007 16:04:26 GMT",
"version": "v2"
},
{
"created": "Tue, 1 Nov 2011 16:52:45 GMT",
"version": "v3"
},
{
"created": "Sat, 15 Jun 2013 21:18:28 GMT",
"version": "v4"
}
] | 2013-06-18 | [
[
"Yahalom",
"Asher",
""
]
] | In this paper I discuss whether superluminal particles exist in the general relativistic theory of gravity. It seems that the answer to this question is negative. In truth the result may only represent a difficulty to {\bf special} but not general relativity, the later allowing both Lorentzian and Euclidian metrics. An... |
2406.10333 | Oscar J. C. Dias | Oscar J.C. Dias, Jorge E. Santos and Benson Way | Spinning Black Binaries in de Sitter space | 15 pages, 11 figures. arXiv admin note: text overlap with
arXiv:2303.07361 | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | We construct stationary, rotating black binaries in general relativity with a
positive cosmological constant. We consider identical black holes with either
aligned or anti-aligned spins. Both cases have less entropy than the
corresponding single Kerr/Schwarzschild de Sitter black hole with the same
total angular mome... | [
{
"created": "Fri, 14 Jun 2024 18:00:01 GMT",
"version": "v1"
}
] | 2024-06-18 | [
[
"Dias",
"Oscar J. C.",
""
],
[
"Santos",
"Jorge E.",
""
],
[
"Way",
"Benson",
""
]
] | We construct stationary, rotating black binaries in general relativity with a positive cosmological constant. We consider identical black holes with either aligned or anti-aligned spins. Both cases have less entropy than the corresponding single Kerr/Schwarzschild de Sitter black hole with the same total angular moment... |
2212.03276 | Shafaq Elahi | Shafaq Gulzar Elahi, Soumya Samrat Mandal and Soumitra SenGupta | Novel modulus stabilization mechanism in higher dimensional f(R) Gravity | 11 Pages, 3 figures;Matches the journal version | Phys. Rev. D 108, 044062 (2023) | 10.1103/PhysRevD.108.044062 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we obtain a new warped solution for a 5-dimensional $f(R) $
gravity in an anti de-Sitter bulk. The higher curvature term in the gravity
action is shown to modify the usual warped metric. The novel feature of this
modification leads to a natural geometric stabilization of the modulus/radion
field in the ... | [
{
"created": "Tue, 6 Dec 2022 19:18:09 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Feb 2023 19:47:29 GMT",
"version": "v2"
},
{
"created": "Wed, 25 Oct 2023 03:53:06 GMT",
"version": "v3"
}
] | 2023-10-26 | [
[
"Elahi",
"Shafaq Gulzar",
""
],
[
"Mandal",
"Soumya Samrat",
""
],
[
"SenGupta",
"Soumitra",
""
]
] | In this work, we obtain a new warped solution for a 5-dimensional $f(R) $ gravity in an anti de-Sitter bulk. The higher curvature term in the gravity action is shown to modify the usual warped metric. The novel feature of this modification leads to a natural geometric stabilization of the modulus/radion field in the un... |
2211.00264 | Michael Good | Michael R.R. Good, Chiranjeeb Singha, Vasilios Zarikas | Extreme electron acceleration with fixed radiation energy | 8 pages, 8 figures | Entropy 2022, 24(11), 1570 | 10.3390/e24111570 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We examine the extreme situation of radiation from an electron that is
asymptotically accelerated to the speed of light, resulting in finite emission
energy. The analytic solution explicitly demonstrates the difference between
radiation power loss and kinetic power loss (null).
| [
{
"created": "Tue, 1 Nov 2022 04:11:18 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Nov 2022 06:53:33 GMT",
"version": "v2"
}
] | 2022-11-03 | [
[
"Good",
"Michael R. R.",
""
],
[
"Singha",
"Chiranjeeb",
""
],
[
"Zarikas",
"Vasilios",
""
]
] | We examine the extreme situation of radiation from an electron that is asymptotically accelerated to the speed of light, resulting in finite emission energy. The analytic solution explicitly demonstrates the difference between radiation power loss and kinetic power loss (null). |
1112.5202 | Ana Pelinson | Julio C. Fabris, Ana M. Pelinson, Filipe de O. Salles and Ilya L.
Shapiro | Gravitational waves and stability of cosmological solutions in the
theory with anomaly-induced corrections | Some explanations and general comments added. Fits published version | null | 10.1088/1475-7516/2012/02/019 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of metric perturbations is explored in the gravity theory with
anomaly-induced quantum corrections. Our first purpose is to derive the
equation for gravitational waves in this theory on the general homogeneous and
isotropic background, and then verify the stability of such background with
respect to metr... | [
{
"created": "Wed, 21 Dec 2011 23:06:21 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Feb 2012 20:33:14 GMT",
"version": "v2"
}
] | 2012-02-21 | [
[
"Fabris",
"Julio C.",
""
],
[
"Pelinson",
"Ana M.",
""
],
[
"Salles",
"Filipe de O.",
""
],
[
"Shapiro",
"Ilya L.",
""
]
] | The dynamics of metric perturbations is explored in the gravity theory with anomaly-induced quantum corrections. Our first purpose is to derive the equation for gravitational waves in this theory on the general homogeneous and isotropic background, and then verify the stability of such background with respect to metric... |
1708.04011 | Hideyoshi Arakida | Hideyoshi Arakida | Light Deflection and Gauss-Bonnet Theorem: Definition of Total
Deflection Angle and its Applications | 23 pages, 7 figures | General Relativity and Gravitation, Vol. 50, id 48 (31 pages),
2018 (Editors Choice) | 10.1007/s10714-018-2368-2 | null | gr-qc astro-ph.CO math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we re-examine the light deflection in the Schwarzschild and
the Schwarzschild-de Sitter spacetime. First, supposing a static and
spherically symmetric spacetime, we propose the definition of the total
deflection angle $\alpha$ of the light ray by constructing a quadrilateral
$\Sigma^4$ on the optical r... | [
{
"created": "Mon, 14 Aug 2017 05:00:33 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Sep 2017 00:00:33 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Nov 2017 06:05:02 GMT",
"version": "v3"
},
{
"created": "Thu, 29 Mar 2018 23:42:50 GMT",
"version": "v4"
},
{
"cr... | 2018-04-09 | [
[
"Arakida",
"Hideyoshi",
""
]
] | In this paper, we re-examine the light deflection in the Schwarzschild and the Schwarzschild-de Sitter spacetime. First, supposing a static and spherically symmetric spacetime, we propose the definition of the total deflection angle $\alpha$ of the light ray by constructing a quadrilateral $\Sigma^4$ on the optical ref... |
1905.08274 | Daniela P\'erez | Daniela P\'erez, Gustavo E. Romero | Exact cosmological black hole solutions in Scalar Tensor Vector Gravity | 23 pages, 5 figures | null | 10.1088/1361-6382/ab55c8 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find an exact solution of Scalar-Tensor-Vector Gravity field equations
that represents a black hole embedded in an expanding universe. This is the
first solution of the kind found in the theory. We analyze the properties of
the apparent horizons as well as the essential singularities of the metric, and
compare it ... | [
{
"created": "Mon, 20 May 2019 18:03:05 GMT",
"version": "v1"
}
] | 2020-01-08 | [
[
"Pérez",
"Daniela",
""
],
[
"Romero",
"Gustavo E.",
""
]
] | We find an exact solution of Scalar-Tensor-Vector Gravity field equations that represents a black hole embedded in an expanding universe. This is the first solution of the kind found in the theory. We analyze the properties of the apparent horizons as well as the essential singularities of the metric, and compare it wi... |
2205.06624 | Douglas A. Singleton | Michael Bishop, Joey Contreras, and Douglas Singleton | The more things change the more they stay the same: Minimum lengths with
unmodified uncertainty principle and dispersion relation | 10 pages, 2 figures, revtex4. 2nd place award for the 2022 Gravity
Research Foundation essay competition. To be published IJMPD | null | 10.1142/S0218271822410024 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | Broad arguments indicate that quantum gravity should have a minimal length
scale. In this essay we construct a minimum length model by generalizing the
time-position and energy-momentum operators while keeping much of the structure
of quantum mechanics and relativity intact: the standard position-momentum
commutator,... | [
{
"created": "Wed, 11 May 2022 18:21:26 GMT",
"version": "v1"
}
] | 2022-12-07 | [
[
"Bishop",
"Michael",
""
],
[
"Contreras",
"Joey",
""
],
[
"Singleton",
"Douglas",
""
]
] | Broad arguments indicate that quantum gravity should have a minimal length scale. In this essay we construct a minimum length model by generalizing the time-position and energy-momentum operators while keeping much of the structure of quantum mechanics and relativity intact: the standard position-momentum commutator, t... |
1408.4410 | Hamed Pejhan | S. Rahbardehghan and H. Pejhan | The Krein-Gupta-Bleuler Quantization in de Sitter Space-time; Casimir
Energy-Momentum Tensor for a Curved Brane | 9 pages | Phys. Lett. B 750, 627-632 (2015) | 10.1016/j.physletb.2015.09.066 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, vacuum expectation value (VEV) of the energy-momentum tensor
for a conformally coupled scalar field in de Sitter space-time is investigated
through the Krein-Gupta-Bleuler construction. This construction has already
been successfully applied to the de Sitter minimally coupled massless scalar
field and ... | [
{
"created": "Tue, 19 Aug 2014 18:03:36 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Aug 2014 18:10:00 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Oct 2014 09:47:06 GMT",
"version": "v3"
},
{
"created": "Tue, 30 Dec 2014 06:17:20 GMT",
"version": "v4"
},
{
"cr... | 2018-08-16 | [
[
"Rahbardehghan",
"S.",
""
],
[
"Pejhan",
"H.",
""
]
] | In this paper, vacuum expectation value (VEV) of the energy-momentum tensor for a conformally coupled scalar field in de Sitter space-time is investigated through the Krein-Gupta-Bleuler construction. This construction has already been successfully applied to the de Sitter minimally coupled massless scalar field and ma... |
1806.02979 | Xavier Calmet | Xavier Calmet and Roberto Casadio | What is the final state of a black hole merger? | This paper was submitted to a journal on November 27, 2017 and
accepted on June 05, 2018 | null | 10.1142/S0217732318501249 | MITP/18-018 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this short paper we discuss the possibility of testing the nature of
astrophysical black holes using the recently observed black hole mergers. We
investigate the possibility that a secondary black hole is created in the
merger of two astrophysical black holes and discuss potential astrophysical
signatures. We poin... | [
{
"created": "Fri, 8 Jun 2018 06:09:12 GMT",
"version": "v1"
}
] | 2018-08-01 | [
[
"Calmet",
"Xavier",
""
],
[
"Casadio",
"Roberto",
""
]
] | In this short paper we discuss the possibility of testing the nature of astrophysical black holes using the recently observed black hole mergers. We investigate the possibility that a secondary black hole is created in the merger of two astrophysical black holes and discuss potential astrophysical signatures. We point ... |
1610.05702 | Giulia Gubitosi | Giulia Gubitosi, Joao Magueijo | Correlation between opposite-helicity gravitons: Imprints on
gravity-wave and microwave backgrounds | v2 matches accepted version on Phys.Rev.D | Phys. Rev. D 95, 023520 (2017) | 10.1103/PhysRevD.95.023520 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine some of the roots of parity violation for gravitons and uncover a
closely related new effect: correlations between right and left handed
gravitons. Such correlators have spin 4 if they involve gravitons moving along
the same direction, and spin zero for gravitons moving with opposite
directions. In the fir... | [
{
"created": "Tue, 18 Oct 2016 16:39:12 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Jan 2017 16:17:56 GMT",
"version": "v2"
}
] | 2017-02-08 | [
[
"Gubitosi",
"Giulia",
""
],
[
"Magueijo",
"Joao",
""
]
] | We examine some of the roots of parity violation for gravitons and uncover a closely related new effect: correlations between right and left handed gravitons. Such correlators have spin 4 if they involve gravitons moving along the same direction, and spin zero for gravitons moving with opposite directions. In the first... |
1005.1132 | Matt Visser | Gabriel Abreu (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | Tolman mass, generalized surface gravity, and entropy bounds | V1: 4 pages. Uses revtex4-1; V2: Three references added; V3: Some
notational changes for clarity; introductory paragraph rewritten; no physics
changes. This version accepted for publication in Physical Review Letters | Phys.Rev.Lett.105:041302,2010 | 10.1103/PhysRevLett.105.041302 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In any static spacetime the quasi-local Tolman mass contained within a volume
can be reduced to a Gauss-like surface integral involving the flux of a
suitably defined generalized surface gravity. By introducing some basic
thermodynamics and invoking the Unruh effect one can then develop elementary
bounds on the quasi... | [
{
"created": "Fri, 7 May 2010 04:13:05 GMT",
"version": "v1"
},
{
"created": "Tue, 25 May 2010 02:14:25 GMT",
"version": "v2"
},
{
"created": "Tue, 29 Jun 2010 12:01:34 GMT",
"version": "v3"
}
] | 2014-11-21 | [
[
"Abreu",
"Gabriel",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | In any static spacetime the quasi-local Tolman mass contained within a volume can be reduced to a Gauss-like surface integral involving the flux of a suitably defined generalized surface gravity. By introducing some basic thermodynamics and invoking the Unruh effect one can then develop elementary bounds on the quasi-l... |
1905.13519 | Sunil Maurya DR. | S. K. Maurya and Francisco Tello-Ortiz | Charged anisotropic compact star in $f(R,\mathcal{T})$ gravity: A
minimal geometric deformation gravitational decoupling approach | 18 figures, submitted in JCAP | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This article is devoted to the study of high dense charged anisotropic
compact structures in the framework of $f(R,\mathcal{T})$ gravity theory. The
principal aims of this investigation, regard the extension of the isotropic
Durgapal-Fuloria model within the context of charged isotropic
$f(R,\mathcal{T})$ solutions. ... | [
{
"created": "Fri, 31 May 2019 11:27:19 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Aug 2019 18:07:06 GMT",
"version": "v2"
}
] | 2019-08-22 | [
[
"Maurya",
"S. K.",
""
],
[
"Tello-Ortiz",
"Francisco",
""
]
] | This article is devoted to the study of high dense charged anisotropic compact structures in the framework of $f(R,\mathcal{T})$ gravity theory. The principal aims of this investigation, regard the extension of the isotropic Durgapal-Fuloria model within the context of charged isotropic $f(R,\mathcal{T})$ solutions. Th... |
gr-qc/9408022 | null | Pedro F. Gonzalez-Diaz | Wormholes and Cosmic Strings | 5, IMAFF-RC-10-94# | null | null | null | gr-qc | null | A gravitational scenario is proposed where the euclidean action is invariant
under the isotropic and homogeneous version of the euclidean {\it U(1)} group
of local transformations of the scale factor and scalar matter field,
interpreting the the trace of the second fundamental form as the gauge field.
The model allow... | [
{
"created": "Thu, 18 Aug 1994 09:40:20 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Gonzalez-Diaz",
"Pedro F.",
""
]
] | A gravitational scenario is proposed where the euclidean action is invariant under the isotropic and homogeneous version of the euclidean {\it U(1)} group of local transformations of the scale factor and scalar matter field, interpreting the the trace of the second fundamental form as the gauge field. The model allows ... |
gr-qc/0007024 | Rainer E. Zimmermann | Rainer E. Zimmermann | Classicity from Entangled Ensemble States of Knotted Spin Networks. A
Conceptual Approach | Contribution to icmp2000, July 17-22, 2000, Imperial College London
(GRL 2.11) | null | null | null | gr-qc | null | Referring to a conception put forward by Stuart Kauffman in his
"Investigations", it is shown how the onset of classicity can be visualized in
terms of an emergent process originating in entangled ensemble states of
knotted spin networks. The latter exhibit a suitable autocatalytic behaviour
effectively producing kno... | [
{
"created": "Wed, 12 Jul 2000 17:05:59 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Zimmermann",
"Rainer E.",
""
]
] | Referring to a conception put forward by Stuart Kauffman in his "Investigations", it is shown how the onset of classicity can be visualized in terms of an emergent process originating in entangled ensemble states of knotted spin networks. The latter exhibit a suitable autocatalytic behaviour effectively producing knots... |
1401.1797 | Cristian Quinzacara | Cristian Quinzacara and Patricio Salgado | Black hole for the Einstein-Chern-Simons gravity | 19 pages, 15 figures | Phys. Rev. D, 85:124026, Jun 2012 | 10.1103/PhysRevD.85.124026 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a 5-dimensional action which is composed of a gravitational
sector and a sector of matter, where the gravitational sector is given by a
Einstein-Chern-Simons gravity action instead of the Einstein-Hilbert action. We
obtain the Einstein-Chern-Simons (EChS) field equations together with its
spherically sym-... | [
{
"created": "Wed, 8 Jan 2014 20:06:32 GMT",
"version": "v1"
}
] | 2014-01-09 | [
[
"Quinzacara",
"Cristian",
""
],
[
"Salgado",
"Patricio",
""
]
] | We consider a 5-dimensional action which is composed of a gravitational sector and a sector of matter, where the gravitational sector is given by a Einstein-Chern-Simons gravity action instead of the Einstein-Hilbert action. We obtain the Einstein-Chern-Simons (EChS) field equations together with its spherically sym- m... |
2112.05932 | Henry Wai Yin Wong | Henry W. Y. Wong, Lok W. L. Chan, Isaac C. F. Wong, Rico K. L. Lo,
Tjonnie G. F. Li | Using overlap of sky localization probability maps for filtering
potentially lensed pairs of gravitational-wave signals | 8 pages, 3 figures, 2 tables | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | When a gravitational wave passes by a massive object, its trajectory gets
curved which can result in multiple images separated by a time delay, a
phenomenon known as strong lensing. Although gravitational wave lensing has not
been observed yet, it is currently predicted that it will be possible to detect
with third-g... | [
{
"created": "Sat, 11 Dec 2021 08:50:03 GMT",
"version": "v1"
}
] | 2021-12-14 | [
[
"Wong",
"Henry W. Y.",
""
],
[
"Chan",
"Lok W. L.",
""
],
[
"Wong",
"Isaac C. F.",
""
],
[
"Lo",
"Rico K. L.",
""
],
[
"Li",
"Tjonnie G. F.",
""
]
] | When a gravitational wave passes by a massive object, its trajectory gets curved which can result in multiple images separated by a time delay, a phenomenon known as strong lensing. Although gravitational wave lensing has not been observed yet, it is currently predicted that it will be possible to detect with third-gen... |
2301.04784 | De-Cheng Zou | De-Cheng Zou, Bo Meng, Ming Zhang, Sheng-Yuan Li, Meng-Yun Lai and Yun
Soo Myung | Analytical approximate solutions for scalarized AdS black holes | 20 pages, 5 figures | Universe 2023, 9(1), 26 | 10.3390/universe9010026 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The spontaneous scalarization of Schwarzscild-AdS is investigated in the
Einstein-scalar-Gauss--Bonnet (ESGB) theory. Firstly, we construct scalarized
AdS black holes numerically. Secondly, making use of the homotopy analysis
method (HAM), we obtain analytical approximate solutions for scalarized AdS
black holes in t... | [
{
"created": "Thu, 12 Jan 2023 02:23:22 GMT",
"version": "v1"
}
] | 2023-01-13 | [
[
"Zou",
"De-Cheng",
""
],
[
"Meng",
"Bo",
""
],
[
"Zhang",
"Ming",
""
],
[
"Li",
"Sheng-Yuan",
""
],
[
"Lai",
"Meng-Yun",
""
],
[
"Myung",
"Yun Soo",
""
]
] | The spontaneous scalarization of Schwarzscild-AdS is investigated in the Einstein-scalar-Gauss--Bonnet (ESGB) theory. Firstly, we construct scalarized AdS black holes numerically. Secondly, making use of the homotopy analysis method (HAM), we obtain analytical approximate solutions for scalarized AdS black holes in the... |
2407.08945 | Hassan Alshal | Hassan Alshal, Leyang Ding, Adelina Hernandez, Leo A. Illing, and Ivar
Rydstrom | Linearized Stability of Harada Thin-Shell Wormholes | 6 pages, 4 figures | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | Using Darmois-Israel-Sen junction conditions, and with help of Visser's
cut-and-paste method, we study the dynamics of thin-shell wormholes that are
made of two conformally Killing gravity (a.k.a Harada gravity) black holes. We
check the energy conditions for different values of the new parameter that
Harada introduc... | [
{
"created": "Fri, 12 Jul 2024 03:03:38 GMT",
"version": "v1"
}
] | 2024-07-15 | [
[
"Alshal",
"Hassan",
""
],
[
"Ding",
"Leyang",
""
],
[
"Hernandez",
"Adelina",
""
],
[
"Illing",
"Leo A.",
""
],
[
"Rydstrom",
"Ivar",
""
]
] | Using Darmois-Israel-Sen junction conditions, and with help of Visser's cut-and-paste method, we study the dynamics of thin-shell wormholes that are made of two conformally Killing gravity (a.k.a Harada gravity) black holes. We check the energy conditions for different values of the new parameter that Harada introduced... |
2002.05161 | Ivan de Martino | Ivan de Martino | Giant low-surface-brightness dwarf galaxy as a test bench for MOdified
Gravity | 4 pages; 1 Figure; 1 Table. Accepted for publication on MNRAS | null | 10.1093/mnras/staa460 | null | gr-qc astro-ph.CO astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The lack of detection of supersymmetric particles is leading to look at
alternative avenues for explaining dark matter's effects. Among them, modified
theories of gravity may play an important role accounting even for both dark
components needed in the standard cosmological model. Scalar-Tensor-Vector
Gravity theory ... | [
{
"created": "Wed, 12 Feb 2020 17:18:33 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Feb 2020 14:50:23 GMT",
"version": "v2"
}
] | 2020-02-19 | [
[
"de Martino",
"Ivan",
""
]
] | The lack of detection of supersymmetric particles is leading to look at alternative avenues for explaining dark matter's effects. Among them, modified theories of gravity may play an important role accounting even for both dark components needed in the standard cosmological model. Scalar-Tensor-Vector Gravity theory ha... |
1509.07997 | Craig J. Hogan | Craig Hogan | Exotic Rotational Correlations in Quantum Geometry | 7 pages, 2 figures, submitted to PRD | Phys. Rev. D 95, 104050 (2017) | 10.1103/PhysRevD.95.104050 | FERMILAB-PUB-15-410-A | gr-qc astro-ph.CO quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is argued that the classical local inertial frame used to define
rotational states of quantum systems is only approximate, and that geometry
itself must also be rotationally quantized at the Planck scale. A Lorentz
invariant statistical model of correlations in quantum geometry on larger
scales predicts spacelike ... | [
{
"created": "Sat, 26 Sep 2015 15:31:02 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jun 2016 18:24:24 GMT",
"version": "v10"
},
{
"created": "Wed, 20 Jul 2016 19:32:07 GMT",
"version": "v11"
},
{
"created": "Fri, 5 Aug 2016 17:36:44 GMT",
"version": "v12"
},
{
... | 2017-06-07 | [
[
"Hogan",
"Craig",
""
]
] | It is argued that the classical local inertial frame used to define rotational states of quantum systems is only approximate, and that geometry itself must also be rotationally quantized at the Planck scale. A Lorentz invariant statistical model of correlations in quantum geometry on larger scales predicts spacelike co... |
1312.3456 | Ulrich Jentschura | U. D. Jentschura and J. H. Noble | Foldy-Wouthuysen Transformation, Scalar Potentials and Gravity | 11 pages; RevTeX | J.Phys.A 47 (2014) 045402 | 10.1088/1751-8113/47/4/045402 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that care is required in formulating the nonrelativistic limit of
generalized Dirac Hamiltonians which describe particles and antiparticles
interacting with static electric and/or gravitational fields. The Dirac-Coulomb
and the Dirac-Schwarzschild Hamiltonians, and the corrections to the Dirac
equation in a n... | [
{
"created": "Thu, 12 Dec 2013 11:51:00 GMT",
"version": "v1"
}
] | 2014-01-06 | [
[
"Jentschura",
"U. D.",
""
],
[
"Noble",
"J. H.",
""
]
] | We show that care is required in formulating the nonrelativistic limit of generalized Dirac Hamiltonians which describe particles and antiparticles interacting with static electric and/or gravitational fields. The Dirac-Coulomb and the Dirac-Schwarzschild Hamiltonians, and the corrections to the Dirac equation in a non... |
gr-qc/9702029 | null | H. M. Antia (Tata Institute of Fundamental Research, Mumbai) | Admissibility of initial data in spherical collapse | 2 pages, TeX | null | null | null | gr-qc | null | Gravitational collapse of a spherically symmetric cloud has been extensively
studied to investigate the nature of resulting singularity. However, there has
been considerable debate about the admissibility of certain initial density
distributions. Using the Newtonian limit of the equations governing collapse of
a flui... | [
{
"created": "Sun, 16 Feb 1997 10:32:00 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Feb 1997 02:46:00 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Antia",
"H. M.",
"",
"Tata Institute of Fundamental Research, Mumbai"
]
] | Gravitational collapse of a spherically symmetric cloud has been extensively studied to investigate the nature of resulting singularity. However, there has been considerable debate about the admissibility of certain initial density distributions. Using the Newtonian limit of the equations governing collapse of a fluid ... |
gr-qc/9509043 | Angelo Tartaglia | A. Tartaglia (Dip. Fisica, Politecnico; Turin, Italy) | Four Dimensional Elasticity and General Relativity | 10 pages; LATEX, uses thmsa.sty now sent to enable PS conversion; to
appear on Gravitation & Cosmology | Grav.Cosmol. 1 (1995) 335-338 | null | null | gr-qc | null | It has been shown that the extension of the elasticity theory in more than
three dimensions allows a description of space-time as a properly stressed
medium, even recovering the Minkowski metric in the case of uniaxial stress.
The fundamental equation for the metric in the theory is shown to be the
equilibrium equati... | [
{
"created": "Mon, 25 Sep 1995 09:46:18 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Sep 1995 17:33:22 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Tartaglia",
"A.",
"",
"Dip. Fisica, Politecnico; Turin, Italy"
]
] | It has been shown that the extension of the elasticity theory in more than three dimensions allows a description of space-time as a properly stressed medium, even recovering the Minkowski metric in the case of uniaxial stress. The fundamental equation for the metric in the theory is shown to be the equilibrium equation... |
0710.3140 | Andrew Moylan | Andrew J. Moylan, David E. McClelland, Susan M. Scott, Antony C.
Searle, G. V. Bicknell | Numerical wave optics and the lensing of gravitational waves by globular
clusters | To appear in: Proceedings of the Eleventh Marcel Grossmann Meeting | null | 10.1142/9789812834300_0038 | null | gr-qc | null | We consider the possible effects of gravitational lensing by globular
clusters on gravitational waves from asymmetric neutron stars in our galaxy. In
the lensing of gravitational waves, the long wavelength, compared with the
usual case of optical lensing, can lead to the geometrical optics approximation
being invalid... | [
{
"created": "Tue, 16 Oct 2007 17:50:09 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Moylan",
"Andrew J.",
""
],
[
"McClelland",
"David E.",
""
],
[
"Scott",
"Susan M.",
""
],
[
"Searle",
"Antony C.",
""
],
[
"Bicknell",
"G. V.",
""
]
] | We consider the possible effects of gravitational lensing by globular clusters on gravitational waves from asymmetric neutron stars in our galaxy. In the lensing of gravitational waves, the long wavelength, compared with the usual case of optical lensing, can lead to the geometrical optics approximation being invalid, ... |
2010.03947 | De-Chang Dai | De-Chang Dai, Djordje Minic, Dejan Stojkovic | How to form a wormhole | 6 pages, 8 figures | Eur. Phys. J. C (2020) 80:1103 | 10.1140/epjc/s10052-020-08698-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We provide a simple but very useful description of the process of wormhole
formation. We place two massive objects in two parallel universes (modeled by
two branes). Gravitational attraction between the objects competes with the
resistance coming from the brane tension. For sufficiently strong attraction,
the branes ... | [
{
"created": "Wed, 7 Oct 2020 10:54:25 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Dec 2020 00:41:17 GMT",
"version": "v2"
}
] | 2020-12-30 | [
[
"Dai",
"De-Chang",
""
],
[
"Minic",
"Djordje",
""
],
[
"Stojkovic",
"Dejan",
""
]
] | We provide a simple but very useful description of the process of wormhole formation. We place two massive objects in two parallel universes (modeled by two branes). Gravitational attraction between the objects competes with the resistance coming from the brane tension. For sufficiently strong attraction, the branes ar... |
1108.4824 | Saibal Ray | Farook Rahaman, Saibal Ray, A. A. Usmani and Safiqul Islam | The (2+1)-dimensional gravastars | 9 Latex pages with minor addition, Accepeted in PLB | null | 10.1016/j.physletb.2011.12.065 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new model of a gravastar in (2+1) anti-de Sitter space-time.
This new three dimensional configuration has three different regions with
different equations of state: [I] Interior: 0 \leq r < r_1, \rho = -p ; [II]
Shell: r_1 \leq r < r_2, \rho = p; [III] Exterior: r_2 < r, \rho = p =0. The
outer region of ... | [
{
"created": "Wed, 24 Aug 2011 12:29:19 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Jan 2012 06:26:08 GMT",
"version": "v2"
}
] | 2015-05-30 | [
[
"Rahaman",
"Farook",
""
],
[
"Ray",
"Saibal",
""
],
[
"Usmani",
"A. A.",
""
],
[
"Islam",
"Safiqul",
""
]
] | We propose a new model of a gravastar in (2+1) anti-de Sitter space-time. This new three dimensional configuration has three different regions with different equations of state: [I] Interior: 0 \leq r < r_1, \rho = -p ; [II] Shell: r_1 \leq r < r_2, \rho = p; [III] Exterior: r_2 < r, \rho = p =0. The outer region of th... |
1905.12831 | Stanley Deser | S.Deser | Noether Converse: all identically conserved geometric tensors are metric
variations of an action in (at least) D = 2 | null | Phys Lett B 795(2019)482 | 10.1016/j.physletb.2019.06.051 | BRX TH-6650; Calt-TH-2019-019 | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The title's century-old conjecture is established fpr D=2 and is likely for
all D.
| [
{
"created": "Thu, 30 May 2019 02:20:20 GMT",
"version": "v1"
}
] | 2019-07-05 | [
[
"Deser",
"S.",
""
]
] | The title's century-old conjecture is established fpr D=2 and is likely for all D. |
1111.0139 | Dong-han Yeom | Bum-Hoon Lee, Dong-han Yeom | Nucleation and evolution of false vacuum bubbles in scalar-tensor
gravity | 9 pages, 4 figures; A proceeding for the 12th Italian-Korean
Symposium on Relativistic Astrophysics. Talk on July 7, 2011, Pescara, Italy | Nuovo Cim. C36 (2013) S1, 79-87 | 10.1393/ncc/i2013-11488-3 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this presentation, we discuss the nucleation and subsequent evolution of
false vacuum bubbles in the scalar-tensor gravity. First, we transform the
scalar-tensor type theory of gravity to the standard Brans-Dicke type. Second,
we transform the Brans-Dicke type theory from the Jordan frame to the Einstein
frame. Fo... | [
{
"created": "Tue, 1 Nov 2011 08:30:14 GMT",
"version": "v1"
}
] | 2013-10-09 | [
[
"Lee",
"Bum-Hoon",
""
],
[
"Yeom",
"Dong-han",
""
]
] | In this presentation, we discuss the nucleation and subsequent evolution of false vacuum bubbles in the scalar-tensor gravity. First, we transform the scalar-tensor type theory of gravity to the standard Brans-Dicke type. Second, we transform the Brans-Dicke type theory from the Jordan frame to the Einstein frame. For ... |
1312.7116 | Vladimir Khatsymovsky | V.M. Khatsymovsky | On the Faddeev gravity on the piecewise flat manifold | 10 pages, 1 figure | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Faddeev formulation of gravity in which the metric is composed
of vector fields. This system is reducible with the help of the equations of
motion to the general relativity. The Faddeev action is evaluated for the
piecewise flat ansatz for these fields when the metric corresponds to the flat
interior of ... | [
{
"created": "Thu, 26 Dec 2013 15:05:58 GMT",
"version": "v1"
}
] | 2013-12-30 | [
[
"Khatsymovsky",
"V. M.",
""
]
] | We study the Faddeev formulation of gravity in which the metric is composed of vector fields. This system is reducible with the help of the equations of motion to the general relativity. The Faddeev action is evaluated for the piecewise flat ansatz for these fields when the metric corresponds to the flat interior of th... |
gr-qc/9506006 | Arshad Momen | A.P. Balachandran, L. Chandar and Arshad Momen | Edge States in Canonical Gravity | 8 pg., silly latex error fixed ( no change in the content ) | null | null | SU-4240-610 | gr-qc hep-th | null | It is well-known that gauge fields defined on manifolds with spatial
boundaries support states localized at the boundary. In this talk, we show how
similar states arise in canonical gravity abd discuss their physical relevance
using their analogy to quantum Hall effect.
| [
{
"created": "Sun, 4 Jun 1995 00:42:31 GMT",
"version": "v1"
},
{
"created": "Mon, 4 Dec 1995 00:16:38 GMT",
"version": "v2"
}
] | 2008-02-03 | [
[
"Balachandran",
"A. P.",
""
],
[
"Chandar",
"L.",
""
],
[
"Momen",
"Arshad",
""
]
] | It is well-known that gauge fields defined on manifolds with spatial boundaries support states localized at the boundary. In this talk, we show how similar states arise in canonical gravity abd discuss their physical relevance using their analogy to quantum Hall effect. |
1106.4639 | Ion I. Cotaescu | Ion I. Cotaescu | Dirac-Kahler equations on curved spacetimes | 14 pages no figures | null | null | null | gr-qc hep-th math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Lagrangian theory giving rise to a version of the Dirac-Kahler equations on
curved backgrounds is considered. The principal pieces are the general fields
which have values in the algebra of the Dirac matrices and satisfy a Dirac-type
equation. Their components are scalar, pseudo-scalar, vector, axial-vector
fields ... | [
{
"created": "Thu, 23 Jun 2011 06:52:52 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Jun 2011 07:21:21 GMT",
"version": "v2"
},
{
"created": "Tue, 5 Jul 2011 09:53:39 GMT",
"version": "v3"
}
] | 2014-10-07 | [
[
"Cotaescu",
"Ion I.",
""
]
] | A Lagrangian theory giving rise to a version of the Dirac-Kahler equations on curved backgrounds is considered. The principal pieces are the general fields which have values in the algebra of the Dirac matrices and satisfy a Dirac-type equation. Their components are scalar, pseudo-scalar, vector, axial-vector fields an... |
gr-qc/0207052 | Claudio M. G. de Sousa | Claudio M. G. de Sousa | On the frequency shift of gravitational waves | 11 pages, 3 figures; ws-mpla.cls format. This is the first reviewed
version submitted to MPLA. Final version in press at Modern Physics Letters
A, accepted in Jan 2010 | Mod.Phys.Lett.A25:1455-1465,2010 | 10.1142/S0217732310032676 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Considering plane gravitational waves propagating through flat spacetime, it
is shown that curvatures experienced both in the starting point and during
their arrival at the earth can cause a considerable shift in the frequencies as
measured by earth and space-based detectors. Particularly for the case of
resonant bar... | [
{
"created": "Sat, 13 Jul 2002 11:01:37 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Jul 2002 15:25:54 GMT",
"version": "v2"
},
{
"created": "Mon, 9 Feb 2004 00:50:54 GMT",
"version": "v3"
},
{
"created": "Thu, 8 Apr 2004 02:38:36 GMT",
"version": "v4"
},
{
"cre... | 2014-11-17 | [
[
"de Sousa",
"Claudio M. G.",
""
]
] | Considering plane gravitational waves propagating through flat spacetime, it is shown that curvatures experienced both in the starting point and during their arrival at the earth can cause a considerable shift in the frequencies as measured by earth and space-based detectors. Particularly for the case of resonant bar d... |
1009.0602 | Luc Blanchet | Peter Wolf, Luc Blanchet, Christian J. Borde, Serge Reynaud,
Christophe Salomon, Claude Cohen-Tannoudji | Atom gravimeters and gravitational redshift | 2 pages, Brief Communication appeared in Nature (2 September 2010) | Nature 467:E1,2010 | 10.1038/nature09340 | null | gr-qc physics.atom-ph quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent paper, H. Mueller, A. Peters and S. Chu [A precision measurement
of the gravitational redshift by the interference of matter waves, Nature 463,
926-929 (2010)] argued that atom interferometry experiments published a decade
ago did in fact measure the gravitational redshift on the quantum clock
operating a... | [
{
"created": "Fri, 3 Sep 2010 08:21:27 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Wolf",
"Peter",
""
],
[
"Blanchet",
"Luc",
""
],
[
"Borde",
"Christian J.",
""
],
[
"Reynaud",
"Serge",
""
],
[
"Salomon",
"Christophe",
""
],
[
"Cohen-Tannoudji",
"Claude",
""
]
] | In a recent paper, H. Mueller, A. Peters and S. Chu [A precision measurement of the gravitational redshift by the interference of matter waves, Nature 463, 926-929 (2010)] argued that atom interferometry experiments published a decade ago did in fact measure the gravitational redshift on the quantum clock operating at ... |
gr-qc/0501066 | Wai-Mo Suen | Edwin Evans (1), Sai Iyer (1), Erik Schnetter (2), Wai-Mo Suen (1 and
3), Jian Tao (1), Randy Wolfmeyer (1), and Hui-Min Zhang (1) ((1) Physics
Department, Washington University, (2) Albert-Einstein-Institut, (3) Physics
Department, Chinese University of Hong Kong) | Computational Relativistic Astrophysics With Adaptive Mesh Refinement:
Testbeds | 7 pages, 16 figures | Phys.Rev. D71 (2005) 081301 | 10.1103/PhysRevD.71.081301 | WUGRAV Preprint 05-01 | gr-qc astro-ph | null | We have carried out numerical simulations of strongly gravitating systems
based on the Einstein equations coupled to the relativistic hydrodynamic
equations using adaptive mesh refinement (AMR) techniques. We show AMR
simulations of NS binary inspiral and coalescence carried out on a workstation
having an accuracy eq... | [
{
"created": "Thu, 20 Jan 2005 18:52:24 GMT",
"version": "v1"
},
{
"created": "Thu, 3 Mar 2005 19:01:01 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Evans",
"Edwin",
"",
"1 and\n 3"
],
[
"Iyer",
"Sai",
"",
"1 and\n 3"
],
[
"Schnetter",
"Erik",
"",
"1 and\n 3"
],
[
"Suen",
"Wai-Mo",
"",
"1 and\n 3"
],
[
"Tao",
"Jian",
""
],
[
"Wolfmeyer",
"Randy",
"... | We have carried out numerical simulations of strongly gravitating systems based on the Einstein equations coupled to the relativistic hydrodynamic equations using adaptive mesh refinement (AMR) techniques. We show AMR simulations of NS binary inspiral and coalescence carried out on a workstation having an accuracy equi... |
1807.01520 | Joao Magueijo | Joao Magueijo and Lee Smolin | A Universe that does not know the time | null | Universe 2019, 5(3), 84 | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we propose that cosmological time is a quantum observable that
does not commute with other quantum operators essential for the definition of
cosmological states, notably the cosmological constant. This is inspired by
properties of a measure of time---the Chern-Simons time---and the fact that in
some the... | [
{
"created": "Wed, 4 Jul 2018 11:15:52 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Jul 2018 22:16:15 GMT",
"version": "v2"
},
{
"created": "Mon, 17 Sep 2018 10:05:03 GMT",
"version": "v3"
}
] | 2020-02-11 | [
[
"Magueijo",
"Joao",
""
],
[
"Smolin",
"Lee",
""
]
] | In this paper we propose that cosmological time is a quantum observable that does not commute with other quantum operators essential for the definition of cosmological states, notably the cosmological constant. This is inspired by properties of a measure of time---the Chern-Simons time---and the fact that in some theor... |
2405.08673 | Juan Mauricio Valencia Villegas | S. Mironov and M. Valencia-Villegas | Healthy Horndeski cosmologies with torsion | 21 pages, 13 Figures. Version accepted for publication in JCAP.
Results unchanged. Added references | null | 10.1088/1475-7516/2024/07/030 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the full Horndeski theory with both curvature and torsion can
support nonsingular, stable and subluminal cosmological solutions at all times.
Thus, with torsion, the usual No-Go theorem that holds in a curved spacetime is
avoided. In particular, it is essential to include the nonminimal derivative
coupli... | [
{
"created": "Tue, 14 May 2024 14:55:17 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Jul 2024 13:36:24 GMT",
"version": "v2"
}
] | 2024-07-22 | [
[
"Mironov",
"S.",
""
],
[
"Valencia-Villegas",
"M.",
""
]
] | We show that the full Horndeski theory with both curvature and torsion can support nonsingular, stable and subluminal cosmological solutions at all times. Thus, with torsion, the usual No-Go theorem that holds in a curved spacetime is avoided. In particular, it is essential to include the nonminimal derivative coupling... |
gr-qc/9407014 | Daksh Lohiya | Daksh Lohia | Non - Topological Solitons in non-minimally coupled Scalar fields:
Theory and consequences | Normal TeX, 19 pages, 3 figures available from author | null | null | null | gr-qc | null | In theories of gravitation in which dimensional parameters are dynamically
induced, one can have non - topological - soliton solutions. This article
reviews related topics connected with such solutions. The existence of such
solutions in curved spacetime can give rise to halos of gravity (g-) balls with
gravitational... | [
{
"created": "Wed, 13 Jul 1994 09:19:43 GMT",
"version": "v1"
}
] | 2009-09-25 | [
[
"Lohia",
"Daksh",
""
]
] | In theories of gravitation in which dimensional parameters are dynamically induced, one can have non - topological - soliton solutions. This article reviews related topics connected with such solutions. The existence of such solutions in curved spacetime can give rise to halos of gravity (g-) balls with gravitational `... |
1909.01324 | Vasilis Oikonomou | Shin'ichi Nojiri, S.D. Odintsov, V.K. Oikonomou, Arkady A. Popov | Propagation of Gravitational Waves in Chern-Simons Axion Einstein
Gravity | PRD Accepted. arXiv admin note: text overlap with arXiv:1907.01625 | Phys. Rev. D 100, 084009 (2019) | 10.1103/PhysRevD.100.084009 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we shall investigate the propagation of gravitational waves in
a flat Friedman-Robertson-Walker background, in the context of a string
motivated corrected Einstein gravity. Particularly, we shall consider a
misalignment axion Einstein gravity in the presence of a string originating
Chern-Simons coupling... | [
{
"created": "Tue, 3 Sep 2019 17:42:56 GMT",
"version": "v1"
},
{
"created": "Sun, 22 Sep 2019 16:21:25 GMT",
"version": "v2"
}
] | 2019-10-16 | [
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
],
[
"Popov",
"Arkady A.",
""
]
] | In this paper we shall investigate the propagation of gravitational waves in a flat Friedman-Robertson-Walker background, in the context of a string motivated corrected Einstein gravity. Particularly, we shall consider a misalignment axion Einstein gravity in the presence of a string originating Chern-Simons coupling o... |
gr-qc/9811032 | Shahar Hod | Shahar Hod | Late-Time Evolution of Realistic Rotating Collapse and The No-Hair
Theorem | 16 pages | Phys.Rev. D58 (1998) 104022 | 10.1103/PhysRevD.58.104022 | null | gr-qc | null | We study analytically the asymptotic late-time evolution of realistic
rotating collapse. This is done by considering the asymptotic late-time
solutions of Teukolsky's master equation, which governs the evolution of
gravitational, electromagnetic, neutrino and scalar perturbations fields on
Kerr spacetimes. In accorda... | [
{
"created": "Wed, 11 Nov 1998 12:19:34 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Nov 1998 08:46:22 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Hod",
"Shahar",
""
]
] | We study analytically the asymptotic late-time evolution of realistic rotating collapse. This is done by considering the asymptotic late-time solutions of Teukolsky's master equation, which governs the evolution of gravitational, electromagnetic, neutrino and scalar perturbations fields on Kerr spacetimes. In accordanc... |
1303.0060 | Tim Koslowski A | Henrique Gomes, Tim Koslowski | Differences and similarities between Shape Dynamics and General
Relativity | 3 pages, LaTeX; talk given at the 13th Marcel Grossmann Meeting in
Stockholm, July 2012 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this contribution is to elucidate some of the properties of
Shape Dynamics (SD) and is largely based on a recent longer article. We shall
point out some of the key differences between SD and related theoretical
constructions, illustrate the central mechanism of symmetry trading in
electromagnetism and ... | [
{
"created": "Fri, 1 Mar 2013 00:53:22 GMT",
"version": "v1"
}
] | 2013-03-04 | [
[
"Gomes",
"Henrique",
""
],
[
"Koslowski",
"Tim",
""
]
] | The purpose of this contribution is to elucidate some of the properties of Shape Dynamics (SD) and is largely based on a recent longer article. We shall point out some of the key differences between SD and related theoretical constructions, illustrate the central mechanism of symmetry trading in electromagnetism and fi... |
gr-qc/0107002 | Lorenzo Iorio | Lorenzo Iorio, Herbert I. M. Lichtenegger, Bahram Mashhoon | An alternative derivation of the gravitomagnetic clock effect | LaTex2e, 11 pages, 1 figure, IOP macros. Submitted to Classical and
Quantum Gravity | Class.Quant.Grav.19:39-49,2002 | 10.1088/0264-9381/19/1/303 | null | gr-qc astro-ph | null | The possibility of detecting the gravitomagnetic clock effect using
artificial Earth satellites provides the incentive to develop a more intuitive
approach to its derivation. We first consider two test electric charges moving
on the same circular orbit but in opposite directions in orthogonal electric
and magnetic fi... | [
{
"created": "Sat, 30 Jun 2001 14:59:02 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Nov 2001 17:36:56 GMT",
"version": "v2"
}
] | 2010-05-28 | [
[
"Iorio",
"Lorenzo",
""
],
[
"Lichtenegger",
"Herbert I. M.",
""
],
[
"Mashhoon",
"Bahram",
""
]
] | The possibility of detecting the gravitomagnetic clock effect using artificial Earth satellites provides the incentive to develop a more intuitive approach to its derivation. We first consider two test electric charges moving on the same circular orbit but in opposite directions in orthogonal electric and magnetic fiel... |
2308.05209 | Luis Gabriel Gomez Diaz PhD | Gabriel G\'omez, \'Angel Rinc\'on and Norman Cruz | Black Holes with Abelian and Non-Abelian Charges and Their Impact on
Matter Accretion Flows | 19 pages, 8 figures. References updated, some comments included and
figure 1 added to match published version | Annals Phys. 459 (2023) 169489 | 10.1016/j.aop.2023.169489 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We study the black hole spacetime structure of a model consisting of the
standard Maxwell theory and a $p$-power-Yang-Mills term. This non-linear
contribution introduces a non-Abelian charge into the global solution,
resulting in a modified structure of the standard Reissner-Nordstr\"{o}m black
hole. Specifically, we... | [
{
"created": "Wed, 9 Aug 2023 20:12:05 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Nov 2023 13:58:20 GMT",
"version": "v2"
}
] | 2023-11-03 | [
[
"Gómez",
"Gabriel",
""
],
[
"Rincón",
"Ángel",
""
],
[
"Cruz",
"Norman",
""
]
] | We study the black hole spacetime structure of a model consisting of the standard Maxwell theory and a $p$-power-Yang-Mills term. This non-linear contribution introduces a non-Abelian charge into the global solution, resulting in a modified structure of the standard Reissner-Nordstr\"{o}m black hole. Specifically, we f... |
1809.04612 | Shahar Hod | Shahar Hod | Black-hole evaporation, cosmic censorship, and a quantum lower bound on
the Bekenstein-Hawking temperature | 8 pages | The European Physical Journal C (Letter) 78, 634 (2018) | 10.1140/epjc/s10052-018-6128-y | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The semi-classical Hawking evaporation process of Reissner-Nordstr\"om black
holes is analyzed. It is shown that this quantum mechanism may turn a
near-extremal black-hole spacetime with $T_{\text{BH}}\lesssim \hbar^2/G^2M^3$
into an horizonless naked singularity, thus violating the Penrose cosmic
censorship conjectu... | [
{
"created": "Wed, 12 Sep 2018 18:00:36 GMT",
"version": "v1"
}
] | 2018-09-19 | [
[
"Hod",
"Shahar",
""
]
] | The semi-classical Hawking evaporation process of Reissner-Nordstr\"om black holes is analyzed. It is shown that this quantum mechanism may turn a near-extremal black-hole spacetime with $T_{\text{BH}}\lesssim \hbar^2/G^2M^3$ into an horizonless naked singularity, thus violating the Penrose cosmic censorship conjecture... |
1301.1591 | Enno Harms | Enno Harms, Sebastiano Bernuzzi, Bernd Bruegmann | Numerical solution of the 2+1 Teukolsky equation on a hyperboloidal and
horizon penetrating foliation of Kerr and application to late-time decays | null | Class. Quantum Grav. 30 (2013) 115013 | 10.1088/0264-9381/30/11/115013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we present a formulation of the Teukolsky equation for generic
spin perturbations on the hyperboloidal and horizon penetrating foliation of
Kerr recently proposed by Racz and Toth. An additional, spin-dependent
rescaling of the field variable can be used to achieve stable, long-term, and
accurate time-do... | [
{
"created": "Tue, 8 Jan 2013 16:58:49 GMT",
"version": "v1"
}
] | 2013-05-15 | [
[
"Harms",
"Enno",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Bruegmann",
"Bernd",
""
]
] | In this work we present a formulation of the Teukolsky equation for generic spin perturbations on the hyperboloidal and horizon penetrating foliation of Kerr recently proposed by Racz and Toth. An additional, spin-dependent rescaling of the field variable can be used to achieve stable, long-term, and accurate time-doma... |
gr-qc/0612007 | Paul Lasky | Paul Lasky, Anthony Lun | Spherically Symmetric Gravitational Collapse of General Fluids | 11 pages, 3 figures, submitted to Phys. Rev. D | Phys.Rev.D75:024031,2007 | 10.1103/PhysRevD.75.024031 | null | gr-qc | null | We express Einstein's field equations for a spherically symmetric ball of
general fluid such that they are conducive to an initial value problem. We show
how the equations reduce to the Vaidya spacetime in a non-null coordinate
frame, simply by designating specific equations of state. Furthermore, this
reduces to the... | [
{
"created": "Fri, 1 Dec 2006 04:31:25 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Lasky",
"Paul",
""
],
[
"Lun",
"Anthony",
""
]
] | We express Einstein's field equations for a spherically symmetric ball of general fluid such that they are conducive to an initial value problem. We show how the equations reduce to the Vaidya spacetime in a non-null coordinate frame, simply by designating specific equations of state. Furthermore, this reduces to the S... |
1004.0254 | Ishwaree Neupane | Ishwaree P Neupane | The warping of extra spaces accelerates the expansion of the universe | 7 pages, no figure; Selected for an "Honorable Mention" (15 May 2010)
in the Gravity Research Foundation 2010 Awards for Essays on Gravitation | Int. J. Mod. Phys. D19: 2281-2287, 2010 | 10.1142/S0218271810018505 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Generic cosmological models derived from higher dimensional theories with
warped extra dimensions have a nonzero cosmological constant-like term induced
on the 3+1 space-time, or a physical 3-brane. In the scenario where this 3+1
space-time is an inflating de Sitter "brane" embedded in a higher-dimensional
space-time... | [
{
"created": "Thu, 1 Apr 2010 23:36:48 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Nov 2010 00:04:15 GMT",
"version": "v2"
}
] | 2011-01-13 | [
[
"Neupane",
"Ishwaree P",
""
]
] | Generic cosmological models derived from higher dimensional theories with warped extra dimensions have a nonzero cosmological constant-like term induced on the 3+1 space-time, or a physical 3-brane. In the scenario where this 3+1 space-time is an inflating de Sitter "brane" embedded in a higher-dimensional space-time, ... |
1503.04355 | Felipe Faria | F. F. Faria | Quantum massive conformal gravity | v2: 10 pages, quantization procedure changed. v3: 10 pages, improved
version, match the published version | Eur. Phys. J. C (2016) 76:188 | 10.1140/epjc/s10052-016-4037-5 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We first find the linear approximation of the second plus fourth order
derivative massive conformal gravity action. Then we reduce the linearized
action to separated second order derivative terms, which allows us to quantize
the theory by using the standard first order canonical quantization method. It
is shown that ... | [
{
"created": "Sat, 14 Mar 2015 22:08:05 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Sep 2015 21:27:57 GMT",
"version": "v2"
},
{
"created": "Thu, 7 Apr 2016 17:17:55 GMT",
"version": "v3"
}
] | 2016-04-08 | [
[
"Faria",
"F. F.",
""
]
] | We first find the linear approximation of the second plus fourth order derivative massive conformal gravity action. Then we reduce the linearized action to separated second order derivative terms, which allows us to quantize the theory by using the standard first order canonical quantization method. It is shown that qu... |
1505.05920 | Florian Beyer | Florian Beyer, Leon Escobar and J\"org Frauendiener | Numerical solutions of Einstein's equations for cosmological spacetimes
with spatial topology S3 and symmetry group U(1) | 34 pages, 12 figures. Only small changes from previous version.
Matches the published version. Conclusions unchanged | Phys. Rev. D 93, 043009 (2016) | 10.1103/PhysRevD.93.043009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we consider the single patch pseudo-spectral scheme for
tensorial and spinorial evolution problems on the 2-sphere presented in [3,4]
which is based on the spin-weighted spherical harmonics transform. We apply and
extend this method to Einstein's equations and certain classes of spherical
cosmological s... | [
{
"created": "Thu, 21 May 2015 23:07:49 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Oct 2015 20:20:17 GMT",
"version": "v2"
},
{
"created": "Wed, 2 Mar 2016 01:08:28 GMT",
"version": "v3"
}
] | 2016-03-09 | [
[
"Beyer",
"Florian",
""
],
[
"Escobar",
"Leon",
""
],
[
"Frauendiener",
"Jörg",
""
]
] | In this paper we consider the single patch pseudo-spectral scheme for tensorial and spinorial evolution problems on the 2-sphere presented in [3,4] which is based on the spin-weighted spherical harmonics transform. We apply and extend this method to Einstein's equations and certain classes of spherical cosmological spa... |
gr-qc/0311021 | Slava G. Turyshev | James G. Williams, Slava G. Turyshev, Thomas W. Murphy Jr | Improving LLR Tests of Gravitational Theory | 15 pages, 3 figures, talk presented at 2003 NASA/JPL Workshop on
Fundamental Physics in Space, April 14-16, 2003, Oxnard, CA | Int.J.Mod.Phys.D13:567-582,2004 | 10.1142/S0218271804004682 | null | gr-qc | null | Accurate analysis of precision ranges to the Moon has provided several tests
of gravitational theory including the Equivalence Principle, geodetic
precession, parameterized post-Newtonian (PPN) parameters $\gamma$ and $\beta$,
and the constancy of the gravitational constant {\it G}. Since the beginning of
the experim... | [
{
"created": "Fri, 7 Nov 2003 07:50:04 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Williams",
"James G.",
""
],
[
"Turyshev",
"Slava G.",
""
],
[
"Murphy",
"Thomas W.",
"Jr"
]
] | Accurate analysis of precision ranges to the Moon has provided several tests of gravitational theory including the Equivalence Principle, geodetic precession, parameterized post-Newtonian (PPN) parameters $\gamma$ and $\beta$, and the constancy of the gravitational constant {\it G}. Since the beginning of the experimen... |
1508.03044 | Emanuele Berti | Andrea Maselli, Hector O. Silva, Masato Minamitsuji, Emanuele Berti | Slowly rotating black hole solutions in Horndeski gravity | Fixed more typos found in proof. Matches version published in PRD | Phys. Rev. D 92, 104049 (2015) | 10.1103/PhysRevD.92.104049 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study black hole solutions at first order in the Hartle-Thorne
slow-rotation approximation in Horndeski gravity theories. We derive the
equations of motion including also cases where the scalar depends linearly on
time. In the Hartle-Thorne formalism, all first-order rotational corrections
are described by a singl... | [
{
"created": "Wed, 12 Aug 2015 20:06:48 GMT",
"version": "v1"
},
{
"created": "Sat, 22 Aug 2015 17:31:53 GMT",
"version": "v2"
},
{
"created": "Mon, 9 Nov 2015 22:17:49 GMT",
"version": "v3"
},
{
"created": "Thu, 26 Nov 2015 22:13:32 GMT",
"version": "v4"
}
] | 2015-12-02 | [
[
"Maselli",
"Andrea",
""
],
[
"Silva",
"Hector O.",
""
],
[
"Minamitsuji",
"Masato",
""
],
[
"Berti",
"Emanuele",
""
]
] | We study black hole solutions at first order in the Hartle-Thorne slow-rotation approximation in Horndeski gravity theories. We derive the equations of motion including also cases where the scalar depends linearly on time. In the Hartle-Thorne formalism, all first-order rotational corrections are described by a single ... |
1407.1530 | Orlando Luongo | Orlando Luongo, Hernando Quevedo | Characterizing repulsive gravity with curvature eigenvalues | 11 pages, 5 figures, comments added, typos corrected, final version
accepted in Phys. Rev. D | null | 10.1103/PhysRevD.90.084032 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Repulsive gravity has been investigated in several scenarios near compact
objects by using different intuitive approaches. Here, we propose an invariant
method to characterize regions of repulsive gravity, associated to black holes
and naked singularities. Our method is based upon the behavior of the curvature
tensor... | [
{
"created": "Sun, 6 Jul 2014 19:01:20 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Oct 2014 07:16:08 GMT",
"version": "v2"
}
] | 2015-06-22 | [
[
"Luongo",
"Orlando",
""
],
[
"Quevedo",
"Hernando",
""
]
] | Repulsive gravity has been investigated in several scenarios near compact objects by using different intuitive approaches. Here, we propose an invariant method to characterize regions of repulsive gravity, associated to black holes and naked singularities. Our method is based upon the behavior of the curvature tensor e... |
2203.14877 | Shibendu Gupta Choudhury | Shibendu Gupta Choudhury | Role of a magnetic field in the context of inhomogeneous gravitational
collapse | 9 pages, matches with the published version | Eur. Phys. J. Plus 137, 971 (2022) | 10.1140/epjp/s13360-022-03205-5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Magnetic fields have been found to have an inherent capability of acting
against gravity. An important question posed in the literature is whether
presence of a magnetic field can alter the dynamics of a gravitational collapse
and prevent the final formation of a singularity. Inhomogeneous models of
collapse have not... | [
{
"created": "Mon, 28 Mar 2022 16:30:20 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Aug 2022 18:47:55 GMT",
"version": "v2"
}
] | 2022-08-30 | [
[
"Choudhury",
"Shibendu Gupta",
""
]
] | Magnetic fields have been found to have an inherent capability of acting against gravity. An important question posed in the literature is whether presence of a magnetic field can alter the dynamics of a gravitational collapse and prevent the final formation of a singularity. Inhomogeneous models of collapse have not b... |
gr-qc/9910092 | Vladimir Dzhunushaliev | V. Dzhunushaliev, U. Kasper and D. Singleton | Gravitational Flux Tubes | REVTEX, 12 pg | Phys.Lett. B479 (2000) 249-256 | 10.1016/S0370-2693(00)00328-2 | null | gr-qc hep-th | null | By studying multidimensional Kaluza-Klein theories, or gravity plus U(1) or
SU(2) gauge fields it is shown that these theories possess similar flux tube
solutions. The gauge field which fills the tube geometry of these solutions
leads to a comparision with the flux tube structures in QCD. These solutions
also carry a... | [
{
"created": "Tue, 26 Oct 1999 07:43:37 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Dzhunushaliev",
"V.",
""
],
[
"Kasper",
"U.",
""
],
[
"Singleton",
"D.",
""
]
] | By studying multidimensional Kaluza-Klein theories, or gravity plus U(1) or SU(2) gauge fields it is shown that these theories possess similar flux tube solutions. The gauge field which fills the tube geometry of these solutions leads to a comparision with the flux tube structures in QCD. These solutions also carry a `... |
gr-qc/0408024 | Sophie Pireaux | S. Pireaux | Light deflection in Weyl gravity: constraints on the linear parameter | 20 pages, 2 figures (see published version for a better resolution,
or online at stacks.iop/CQG/21/1). To be published in Classical and Quantum
Gravity | Class.Quant.Grav. 21 (2004) 4317-4334 | 10.1088/0264-9381/21/18/004 | null | gr-qc astro-ph | null | Light deflection offers an unbiased test of Weyl's gravity since no
assumption on the conformal factor needs to be made. In this second paper of
our series ``Light deflection in Weyl gravity'', we analyze the constraints
imposed by light deflection experiments on the linear parameter of Weyl's
theory. Regarding solar... | [
{
"created": "Mon, 9 Aug 2004 15:53:13 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Pireaux",
"S.",
""
]
] | Light deflection offers an unbiased test of Weyl's gravity since no assumption on the conformal factor needs to be made. In this second paper of our series ``Light deflection in Weyl gravity'', we analyze the constraints imposed by light deflection experiments on the linear parameter of Weyl's theory. Regarding solar s... |
1108.3377 | Shih-Yuin Lin | David C. M. Ostapchuk, Shih-Yuin Lin, Robert B. Mann, and B. L. Hu | Entanglement Dynamics between Inertial and Non-uniformly Accelerated
Detectors | 20 pages, 15 figures; References added; More analysis given in
Appendix C; Typos corrected | JHEP07 (2012) 072 | 10.1007/JHEP07(2012)072 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the time-dependence of quantum entanglement between two Unruh-DeWitt
detectors, one at rest in a Minkowski frame, the other non-uniformly
accelerated in some specified way. The two detectors each couple to a scalar
quantum field but do not interact directly. The primary challenge in problems
involving non-un... | [
{
"created": "Wed, 17 Aug 2011 01:45:57 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Jan 2012 17:26:54 GMT",
"version": "v2"
},
{
"created": "Tue, 20 Nov 2012 11:44:16 GMT",
"version": "v3"
}
] | 2012-11-21 | [
[
"Ostapchuk",
"David C. M.",
""
],
[
"Lin",
"Shih-Yuin",
""
],
[
"Mann",
"Robert B.",
""
],
[
"Hu",
"B. L.",
""
]
] | We study the time-dependence of quantum entanglement between two Unruh-DeWitt detectors, one at rest in a Minkowski frame, the other non-uniformly accelerated in some specified way. The two detectors each couple to a scalar quantum field but do not interact directly. The primary challenge in problems involving non-unif... |
1510.07316 | Bahram Mashhoon | C. Chicone and B. Mashhoon | Nonlocal Newtonian Cosmology | 42 pages, 5 figures; v2: expanded version accepted for publication in
JMP | J. Math. Phys. 57, 072501 (2016) | 10.1063/1.4958902 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore some of the cosmological implications of the recent classical
nonlocal generalization of Einstein's theory of gravitation in which
nonlocality is due to the gravitational memory of past events. In the Newtonian
regime of this theory, the nonlocal character of gravity simulates dark matter
in spiral galaxie... | [
{
"created": "Sun, 25 Oct 2015 22:29:47 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jul 2016 18:09:31 GMT",
"version": "v2"
}
] | 2016-08-24 | [
[
"Chicone",
"C.",
""
],
[
"Mashhoon",
"B.",
""
]
] | We explore some of the cosmological implications of the recent classical nonlocal generalization of Einstein's theory of gravitation in which nonlocality is due to the gravitational memory of past events. In the Newtonian regime of this theory, the nonlocal character of gravity simulates dark matter in spiral galaxies ... |
gr-qc/0701072 | Bobomurat Ahmedov | B.J. Ahmedov | General Relativistic Thermoelectric Effects in Superconductors | 13 pages, 2 figures | Gen.Rel.Grav.31:357-369,1999 | 10.1023/A:1026692711377 | null | gr-qc astro-ph | null | We discuss the general-relativistic contributions to occur in the
electromagnetic properties of a superconductor with a heat flow. The appearance
of general-relativistic contribution to the magnetic flux through a
superconducting thermoelectric bimetallic circuit is shown. A response of the
Josephson junctions to a h... | [
{
"created": "Sat, 13 Jan 2007 07:25:27 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ahmedov",
"B. J.",
""
]
] | We discuss the general-relativistic contributions to occur in the electromagnetic properties of a superconductor with a heat flow. The appearance of general-relativistic contribution to the magnetic flux through a superconducting thermoelectric bimetallic circuit is shown. A response of the Josephson junctions to a hea... |
1504.04154 | Crucean Cosmin | Cosmin Crucean and Mihaela-Andreea B\u{a}loi | Interaction between Maxwell field and charged scalar field in de Sitter
universe | 24 pages, 5 figures. arXiv admin note: substantial text overlap with
arXiv:0804.3718 | Int.J.Mod. Phys. A 30 (2015) | 10.1142/S0217751X15500888 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the theory of interaction between charged scalar field and Maxwell
field in de Sitter background. Solving the equation of interacting fields we
define the in-out fields as asymptotic free fields and construct the reduction
formalism for scalar field. Then we derive the perturbation expansion of the
scatterin... | [
{
"created": "Thu, 16 Apr 2015 09:26:20 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Apr 2015 05:53:56 GMT",
"version": "v2"
}
] | 2015-06-03 | [
[
"Crucean",
"Cosmin",
""
],
[
"Băloi",
"Mihaela-Andreea",
""
]
] | We study the theory of interaction between charged scalar field and Maxwell field in de Sitter background. Solving the equation of interacting fields we define the in-out fields as asymptotic free fields and construct the reduction formalism for scalar field. Then we derive the perturbation expansion of the scattering ... |
gr-qc/0408032 | Sanjeev S. Seahra | Sanjeev S. Seahra, Chris Clarkson, Roy Maartens (Portsmouth) | Detecting extra dimensions with gravity wave spectroscopy: the black
string brane-world | 4 pages, 5 figures. Comments on the frequency and detectability of
the massive mode signal added, and title modified. Version accepted for
publication in Phys. Rev. Lett | Phys.Rev.Lett. 94 (2005) 121302 | 10.1103/PhysRevLett.94.121302 | ICG 04/28 | gr-qc astro-ph hep-th | null | Using the black string between two branes as a model of a brane-world black
hole, we compute the gravity wave perturbations and identify the features
arising from the additional polarizations of the graviton. The standard
four-dimensional gravitational wave signal acquires late-time oscillations due
to massive modes ... | [
{
"created": "Wed, 11 Aug 2004 14:26:21 GMT",
"version": "v1"
},
{
"created": "Mon, 28 Feb 2005 13:35:27 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Seahra",
"Sanjeev S.",
"",
"Portsmouth"
],
[
"Clarkson",
"Chris",
"",
"Portsmouth"
],
[
"Maartens",
"Roy",
"",
"Portsmouth"
]
] | Using the black string between two branes as a model of a brane-world black hole, we compute the gravity wave perturbations and identify the features arising from the additional polarizations of the graviton. The standard four-dimensional gravitational wave signal acquires late-time oscillations due to massive modes of... |
2304.09363 | Yu-Xiao Liu | Qin Tan, Wen-Di Guo, Yu-Peng Zhang, Yu-Xiao Liu | Characteristic modes of thick brane model: resonances and quasinormal
modes | 10 pages, 6 figures, improved version | Phys.Rev.D 109 (2024) 2, 024017 | 10.1103/PhysRevD.109.024017 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we investigate the gravitational quasinormal modes (QNMs) and
the gravitational resonances of a thick brane model. We use the asymptotic
iteration and shooting methods to obtain the quasinormal frequencies (QNFs) of
the brane. On the other hand, we investigate the resonances and their evolution
numerica... | [
{
"created": "Wed, 19 Apr 2023 01:15:46 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Feb 2024 11:35:32 GMT",
"version": "v2"
}
] | 2024-02-21 | [
[
"Tan",
"Qin",
""
],
[
"Guo",
"Wen-Di",
""
],
[
"Zhang",
"Yu-Peng",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | In this work, we investigate the gravitational quasinormal modes (QNMs) and the gravitational resonances of a thick brane model. We use the asymptotic iteration and shooting methods to obtain the quasinormal frequencies (QNFs) of the brane. On the other hand, we investigate the resonances and their evolution numericall... |
1001.2643 | Francisco Lobo | Jos\'e P. Mimoso, Francisco S. N. Lobo | An anti-Schwarzshild solution: wormholes and scalar-tensor solutions | 3 pages, contribution to the proceedings of the Spanish Relativity
Meeting-ERE2009 | J.Phys.Conf.Ser.229:012078,2010 | 10.1088/1742-6596/229/1/012078 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a static solution with an hyperbolic nature, characterised by
a pseudo-spherical foliation of space. This space-time metric can be perceived
as an anti-Schwarzschild solution, and exhibits repulsive features. It belongs
to the class of static vacuum solutions termed "a degenerate static solution of
cla... | [
{
"created": "Fri, 15 Jan 2010 09:46:48 GMT",
"version": "v1"
}
] | 2010-06-23 | [
[
"Mimoso",
"José P.",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | We investigate a static solution with an hyperbolic nature, characterised by a pseudo-spherical foliation of space. This space-time metric can be perceived as an anti-Schwarzschild solution, and exhibits repulsive features. It belongs to the class of static vacuum solutions termed "a degenerate static solution of class... |
2203.14464 | Mario A. Acero | A. Oliveros, M. A. Sabogal, Mario A. Acero | Barrow holographic dark energy with Granda-Oliveros cut-off | 17 pages, 20 figures. Minor changes; references added. Accepted for
publication in The European Physical Journal Plus (EPJP) | Eur.Phys.J.Plus 137 (2022) 7, 783 | 10.1140/epjp/s13360-022-02994-z | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | A study on the effects of implementing the Granda-Oliveros infrared cutoff in
the recently introduced Barrow Holographic Dark Energy model is presented, and
its cosmological evolution is investigated. We find how the deformation
parameter, $\Delta$, affects the values of $H(z)$, and find that from this
model it is po... | [
{
"created": "Mon, 28 Mar 2022 03:10:54 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Jun 2022 20:39:12 GMT",
"version": "v2"
}
] | 2023-02-15 | [
[
"Oliveros",
"A.",
""
],
[
"Sabogal",
"M. A.",
""
],
[
"Acero",
"Mario A.",
""
]
] | A study on the effects of implementing the Granda-Oliveros infrared cutoff in the recently introduced Barrow Holographic Dark Energy model is presented, and its cosmological evolution is investigated. We find how the deformation parameter, $\Delta$, affects the values of $H(z)$, and find that from this model it is poss... |
1611.09807 | Alexey Toporensky | A. Toporensky and O. Zaslavskii | Redshift of a photon emitted along the black hole horizon | 17 pages, no figures. Minor corrections, matches published version | Eur.Phys.J. C77 (2017) no.3, 179 | 10.1140/epjc/s10052-017-4747-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we derive some general features of the redshift measured by
radially moving observers in the black hole background. Let observer 1 cross
the black hole horizon emitting of a photon while observer 2 crossing the same
horizon later receives it. We show that if (i) the horizon is the outer one
(event horizo... | [
{
"created": "Tue, 29 Nov 2016 19:46:52 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Dec 2016 16:02:21 GMT",
"version": "v2"
},
{
"created": "Thu, 9 Mar 2017 13:10:10 GMT",
"version": "v3"
},
{
"created": "Fri, 31 Mar 2017 17:49:24 GMT",
"version": "v4"
}
] | 2017-04-03 | [
[
"Toporensky",
"A.",
""
],
[
"Zaslavskii",
"O.",
""
]
] | In this work we derive some general features of the redshift measured by radially moving observers in the black hole background. Let observer 1 cross the black hole horizon emitting of a photon while observer 2 crossing the same horizon later receives it. We show that if (i) the horizon is the outer one (event horizon)... |
1906.10393 | Koji Uryu | Koji Uryu, Shijun Yoshida, Eric Gourgoulhon, Charalampos Markakis,
Kotaro Fujisawa, Antonios Tsokaros, Keisuke Taniguchi, Yoshiharu Eriguchi | New code for equilibriums and quasiequilibrium initial data of compact
objects. IV. Rotating relativistic stars with mixed poloidal and toroidal
magnetic fields | 30 pages, 4 figures | Phys. Rev. D 100, 123019 (2019) | 10.1103/PhysRevD.100.123019 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new code for computing fully general relativistic solutions of strongly
magnetized rapidly rotating compact stars is developed as a part of the COCAL
(Compact Object CALculator) code. The full set of Einstein's equations,
Maxwell's equations and magnetohydrodynamic equations are consistently solved
assuming perfect... | [
{
"created": "Tue, 25 Jun 2019 08:56:52 GMT",
"version": "v1"
}
] | 2019-12-25 | [
[
"Uryu",
"Koji",
""
],
[
"Yoshida",
"Shijun",
""
],
[
"Gourgoulhon",
"Eric",
""
],
[
"Markakis",
"Charalampos",
""
],
[
"Fujisawa",
"Kotaro",
""
],
[
"Tsokaros",
"Antonios",
""
],
[
"Taniguchi",
"Keisuke",
"... | A new code for computing fully general relativistic solutions of strongly magnetized rapidly rotating compact stars is developed as a part of the COCAL (Compact Object CALculator) code. The full set of Einstein's equations, Maxwell's equations and magnetohydrodynamic equations are consistently solved assuming perfect c... |
1612.01994 | Thiago Pereira | Oton H. Marcori and Thiago S. Pereira | Two-point Correlation Functions in Inhomogeneous and Anisotropic
Cosmologies | 23 pages, 3 figures. This version matches the published one | null | 10.1088/1475-7516/2017/02/032 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two-point correlation functions are ubiquitous tools of modern cosmology,
appearing in disparate topics ranging from cosmological inflation to late-time
astrophysics. When the background spacetime is maximally symmetric, invariance
arguments can be used to fix the functional dependence of this function as the
invaria... | [
{
"created": "Tue, 6 Dec 2016 17:52:43 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Feb 2017 18:17:38 GMT",
"version": "v2"
}
] | 2017-02-22 | [
[
"Marcori",
"Oton H.",
""
],
[
"Pereira",
"Thiago S.",
""
]
] | Two-point correlation functions are ubiquitous tools of modern cosmology, appearing in disparate topics ranging from cosmological inflation to late-time astrophysics. When the background spacetime is maximally symmetric, invariance arguments can be used to fix the functional dependence of this function as the invariant... |
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