id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gr-qc/9603027 | Robert Paternoga | Robert Graham and Robert Paternoga (Universitaet Essen, Germany) | Physical states of Bianchi type IX quantum cosmologies described by the
Chern-Simons functional | 25 pages, Revtex, 8 figures included, submitted to Phys. Rev. D | Phys.Rev. D54 (1996) 2589-2604 | 10.1103/PhysRevD.54.2589 | null | gr-qc | null | A class of exact solutions of the Wheeler-DeWitt equation for diagonal
Bianchi type IX cosmologies with cosmological constant is derived in the metric
representation. This class consists of all the ``topological solutions'' which
are associated with the Bianchi type IX reduction of the Chern-Simons
functional in Asht... | [
{
"created": "Mon, 18 Mar 1996 18:41:07 GMT",
"version": "v1"
}
] | 2009-10-28 | [
[
"Graham",
"Robert",
"",
"Universitaet Essen, Germany"
],
[
"Paternoga",
"Robert",
"",
"Universitaet Essen, Germany"
]
] | A class of exact solutions of the Wheeler-DeWitt equation for diagonal Bianchi type IX cosmologies with cosmological constant is derived in the metric representation. This class consists of all the ``topological solutions'' which are associated with the Bianchi type IX reduction of the Chern-Simons functional in Ashtek... |
1703.06729 | Sylvain Carrozza | Sylvain Carrozza, Vincent Lahoche and Daniele Oriti | Renormalizable Group Field Theory beyond melonic diagrams: an example in
rank four | 30 pages, 15 figures, 2 tables; v2: acknowledgements added; v3: minor
modifications (including in the title), matches published version | Phys. Rev. D 96, 066007 (2017) | 10.1103/PhysRevD.96.066007 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove the renormalizability of a gauge-invariant, four-dimensional GFT
model on SU(2), whose defining interactions correspond to necklace bubbles
(found also in the context of new large-N expansions of tensor models), rather
than melonic ones, which are not renormalizable in this case. The respective
scaling of di... | [
{
"created": "Mon, 20 Mar 2017 13:23:56 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Apr 2017 22:19:46 GMT",
"version": "v2"
},
{
"created": "Wed, 13 Sep 2017 16:16:58 GMT",
"version": "v3"
}
] | 2017-09-14 | [
[
"Carrozza",
"Sylvain",
""
],
[
"Lahoche",
"Vincent",
""
],
[
"Oriti",
"Daniele",
""
]
] | We prove the renormalizability of a gauge-invariant, four-dimensional GFT model on SU(2), whose defining interactions correspond to necklace bubbles (found also in the context of new large-N expansions of tensor models), rather than melonic ones, which are not renormalizable in this case. The respective scaling of diff... |
1701.01027 | Rafael Augusto Couceiro Correa | P.H.R.S. Moraes, R.A.C. Correa, and G. Ribeiro | The Starobinsky model within the $f(R,T)$ formalism as a cosmological
model | null | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we derive a cosmological model from the $f(R,T)$ theory of
gravity, for which $R$ is the Ricci scalar and $T$ is the trace of the
energy-momentum tensor. We consider $f(R,T)=f(R)+f(T)$, with $f(R)$ being the
Starobinksy model $R+\alpha R^{2}$ and $f(T)=\gamma T$, with $\alpha$ and
$\gamma$ constants. We... | [
{
"created": "Mon, 26 Dec 2016 14:21:22 GMT",
"version": "v1"
}
] | 2017-01-05 | [
[
"Moraes",
"P. H. R. S.",
""
],
[
"Correa",
"R. A. C.",
""
],
[
"Ribeiro",
"G.",
""
]
] | In this paper we derive a cosmological model from the $f(R,T)$ theory of gravity, for which $R$ is the Ricci scalar and $T$ is the trace of the energy-momentum tensor. We consider $f(R,T)=f(R)+f(T)$, with $f(R)$ being the Starobinksy model $R+\alpha R^{2}$ and $f(T)=\gamma T$, with $\alpha$ and $\gamma$ constants. We f... |
1901.05370 | Geoffrey Comp\`ere | Bin Chen, Geoffrey Comp\`ere, Yan Liu, Jiang Long and Xuao Zhang | Spin and Quadrupole Couplings for High Spin Equatorial Intermediate
Mass-ratio Coalescences | 43 pages, 2 ancillary files: data of Appendix A and B, published
version | null | 10.1088/1361-6382/ab4fb0 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Intermediate mass-ratio coalescences are potential signals of ground-based
and space-based gravitational observatories. Accurate modeling of their
waveforms within general relativity can be achieved within black hole
perturbation theory including self-force and finite size effects. In this
paper, we present analytic ... | [
{
"created": "Wed, 16 Jan 2019 16:24:04 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Oct 2019 09:05:56 GMT",
"version": "v2"
}
] | 2020-01-08 | [
[
"Chen",
"Bin",
""
],
[
"Compère",
"Geoffrey",
""
],
[
"Liu",
"Yan",
""
],
[
"Long",
"Jiang",
""
],
[
"Zhang",
"Xuao",
""
]
] | Intermediate mass-ratio coalescences are potential signals of ground-based and space-based gravitational observatories. Accurate modeling of their waveforms within general relativity can be achieved within black hole perturbation theory including self-force and finite size effects. In this paper, we present analytic re... |
2206.04203 | Haret Rosu | Ivan Perez-Roman, Haret C. Rosu | Relativistic hyperbolic motion and its higher order kinematic quantities | 14 pages, 2 figures, minor corrections, but reference to Born's paper
kept as # 7 to match the published version | Rev. Mex. Fis. 68, 060702 (2022) | 10.31349/RevMexFis.68.060702 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the kinematics of the motion of an observer with constant
proper acceleration (relativistic hyperbolic motion) in 1+1 and 1+3 dimensional
Minkowski spacetimes. We provide explicit formulas for all the kinematic
quantities up to the fourth proper time derivative (the Snap). In the 1+3 case,
following a ... | [
{
"created": "Thu, 9 Jun 2022 00:44:40 GMT",
"version": "v1"
},
{
"created": "Wed, 2 Nov 2022 16:26:01 GMT",
"version": "v2"
}
] | 2022-11-03 | [
[
"Perez-Roman",
"Ivan",
""
],
[
"Rosu",
"Haret C.",
""
]
] | We investigate the kinematics of the motion of an observer with constant proper acceleration (relativistic hyperbolic motion) in 1+1 and 1+3 dimensional Minkowski spacetimes. We provide explicit formulas for all the kinematic quantities up to the fourth proper time derivative (the Snap). In the 1+3 case, following a re... |
2303.06427 | Shubham Narawade Mr. | S.A. Narawade, Shashank P. Singh, B. Mishra | Accelerating cosmological models in $f(Q)$ gravity and the phase space
analysis | 13 pages, 9 figures | Physics of the Dark Universe 42 (2023) 101282 | 10.1016/j.dark.2023.101282 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamical aspect of accelerating cosmological model has been studied in
this paper in the context of modified symmetric teleparallel gravity, the
$f(Q)$ gravity. Initially, we have derived the dynamical parameters for two
well known forms of $f(Q)$ such as: (i) log-square-root form and (ii)
exponential form. The ... | [
{
"created": "Sat, 11 Mar 2023 15:32:34 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Jul 2023 04:47:25 GMT",
"version": "v2"
}
] | 2023-07-18 | [
[
"Narawade",
"S. A.",
""
],
[
"Singh",
"Shashank P.",
""
],
[
"Mishra",
"B.",
""
]
] | The dynamical aspect of accelerating cosmological model has been studied in this paper in the context of modified symmetric teleparallel gravity, the $f(Q)$ gravity. Initially, we have derived the dynamical parameters for two well known forms of $f(Q)$ such as: (i) log-square-root form and (ii) exponential form. The eq... |
2312.03383 | Reginald Christian Bernardo | Reginald Christian Bernardo and Guo-Chin Liu and Kin-Wang Ng | Correlations for an anisotropic polarized stochastic gravitational wave
background in pulsar timing arrays | 29 pages + refs, 6 figures, to appear in JCAP, our codes
https://github.com/reggiebernardo/PTAfast | JCAP 04 (2024) 034 | 10.1088/1475-7516/2024/04/034 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent compelling observation of the nanohertz stochastic gravitational
wave background has brought to light a new galactic arena to test gravity. In
this paper, we derive a formula for the most general expression of the
stochastic gravitational wave background correlation that could be tested with
pulsar timing ... | [
{
"created": "Wed, 6 Dec 2023 09:50:24 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Feb 2024 12:16:50 GMT",
"version": "v2"
}
] | 2024-04-12 | [
[
"Bernardo",
"Reginald Christian",
""
],
[
"Liu",
"Guo-Chin",
""
],
[
"Ng",
"Kin-Wang",
""
]
] | The recent compelling observation of the nanohertz stochastic gravitational wave background has brought to light a new galactic arena to test gravity. In this paper, we derive a formula for the most general expression of the stochastic gravitational wave background correlation that could be tested with pulsar timing an... |
0909.2773 | Chao-Guang Huang | Chao-Guang Huang, Yu Tian, Xiao-Ning Wu, Zhan Xu and Bin Zhou | New Geometry with All Killing Vectors Spanning the Poincar\'e Algebra | 7 pages. In the new version, the title and text are both revised | CHIN. PHYS. LETT. Vol. 29, (2012) 040303 | 10.1088/0256-307X/29/4/040303 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The new 4D geometry whose Killing vectors span the Poincar\'e algebra is
presented and its structure is analyzed. The new geometry can be regarded as
the Poincar\'e-invariant solution of the degenerate extension of the vacuum
Einstein field equations with a negative cosmological constant and provides a
static cosmolo... | [
{
"created": "Tue, 15 Sep 2009 11:22:41 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Apr 2012 08:50:59 GMT",
"version": "v2"
}
] | 2012-04-20 | [
[
"Huang",
"Chao-Guang",
""
],
[
"Tian",
"Yu",
""
],
[
"Wu",
"Xiao-Ning",
""
],
[
"Xu",
"Zhan",
""
],
[
"Zhou",
"Bin",
""
]
] | The new 4D geometry whose Killing vectors span the Poincar\'e algebra is presented and its structure is analyzed. The new geometry can be regarded as the Poincar\'e-invariant solution of the degenerate extension of the vacuum Einstein field equations with a negative cosmological constant and provides a static cosmologi... |
2308.00203 | Juan M. Z\'arate Pretel | Juan M. Z. Pretel, Sergio E. Jor\'as, Ribamar R. R. Reis, Sergio B.
Duarte and Jos\'e D. V. Arba\~nil | Compact stars in scalar-tensor theories with a single-well potential and
the corresponding $f(R)$ theory | 9 pages, 6 figures. Accepted for publication in Physics of the Dark
Universe | Phys. Dark Universe 43 (2024) 101394 | 10.1016/j.dark.2023.101394 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The macroscopic properties of compact stars in modified gravity theories can
be significantly different from the general relativistic (GR) predictions.
Within the gravitational context of scalar-tensor theories, with a scalar field
$\phi$ and coupling function $\Phi(\phi)= \exp[2\phi/\sqrt{3}]$, we investigate
the hy... | [
{
"created": "Mon, 31 Jul 2023 23:50:09 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Nov 2023 17:05:41 GMT",
"version": "v2"
}
] | 2023-12-05 | [
[
"Pretel",
"Juan M. Z.",
""
],
[
"Jorás",
"Sergio E.",
""
],
[
"Reis",
"Ribamar R. R.",
""
],
[
"Duarte",
"Sergio B.",
""
],
[
"Arbañil",
"José D. V.",
""
]
] | The macroscopic properties of compact stars in modified gravity theories can be significantly different from the general relativistic (GR) predictions. Within the gravitational context of scalar-tensor theories, with a scalar field $\phi$ and coupling function $\Phi(\phi)= \exp[2\phi/\sqrt{3}]$, we investigate the hydr... |
1810.06522 | David Sloan | David Sloan and George Ellis | Solving the Cosmological Entropy Issue with a Higgs Dilaton | 13 pages, 1 figure | Phys. Rev. D 99, 063518 (2019) | 10.1103/PhysRevD.99.063518 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Current cosmological models require the universe to be in a very smooth
initial state before the onset of inflation, a situation to which Penrose
ascribes a vanishingly small probability, leading to his proposal of a
Conformal Cyclic Cosmology. We present an alternative paradigm, in which the
Higgs plays the role of ... | [
{
"created": "Mon, 15 Oct 2018 17:15:27 GMT",
"version": "v1"
}
] | 2019-03-27 | [
[
"Sloan",
"David",
""
],
[
"Ellis",
"George",
""
]
] | Current cosmological models require the universe to be in a very smooth initial state before the onset of inflation, a situation to which Penrose ascribes a vanishingly small probability, leading to his proposal of a Conformal Cyclic Cosmology. We present an alternative paradigm, in which the Higgs plays the role of di... |
2407.15947 | Pablo Antonio Cano Molina-Ni\~nirola | Pablo A. Cano, Lodovico Capuano, Nicola Franchini, Simon Maenaut,
Sebastian H. V\"olkel | A parametrized quasi-normal mode framework for modified Teukolsky
equations | 15 pages, 5 figures, comments welcome; v2: references added. Version
sent to the journal | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Modifications to general relativity lead to effects in the spectrum of
quasi-normal modes of black holes. In this paper, we develop a parametrized
formalism to describe deviations from general relativity in the Teukolsky
equation, which governs linear perturbations of spinning black holes. We do
this by introducing a... | [
{
"created": "Mon, 22 Jul 2024 18:01:30 GMT",
"version": "v1"
},
{
"created": "Sun, 28 Jul 2024 15:32:56 GMT",
"version": "v2"
}
] | 2024-07-30 | [
[
"Cano",
"Pablo A.",
""
],
[
"Capuano",
"Lodovico",
""
],
[
"Franchini",
"Nicola",
""
],
[
"Maenaut",
"Simon",
""
],
[
"Völkel",
"Sebastian H.",
""
]
] | Modifications to general relativity lead to effects in the spectrum of quasi-normal modes of black holes. In this paper, we develop a parametrized formalism to describe deviations from general relativity in the Teukolsky equation, which governs linear perturbations of spinning black holes. We do this by introducing a c... |
gr-qc/9807047 | Luciano Rezzolla | Luciano Rezzolla, Andrew M. Abrahams, Richard A. Matzner, Mark E.
Rupright and Stuart L. Shapiro | Cauchy-perturbative matching and outer boundary conditions:
computational studies | 20 pages, RevTeX | Phys.Rev. D59 (1999) 064001 | 10.1103/PhysRevD.59.064001 | null | gr-qc | null | We present results from a new technique which allows extraction of
gravitational radiation information from a generic three-dimensional numerical
relativity code and provides stable outer boundary conditions. In our approach
we match the solution of a Cauchy evolution of the nonlinear Einstein field
equations to a se... | [
{
"created": "Fri, 17 Jul 1998 21:34:43 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Rezzolla",
"Luciano",
""
],
[
"Abrahams",
"Andrew M.",
""
],
[
"Matzner",
"Richard A.",
""
],
[
"Rupright",
"Mark E.",
""
],
[
"Shapiro",
"Stuart L.",
""
]
] | We present results from a new technique which allows extraction of gravitational radiation information from a generic three-dimensional numerical relativity code and provides stable outer boundary conditions. In our approach we match the solution of a Cauchy evolution of the nonlinear Einstein field equations to a set ... |
2401.15494 | Jaime Manuel Cabrera | Jaime Manuel Cabrera and Jorge Mauricio Paulin Fuentes | Hamiltonian analysis and Faddeev-Jackiw formalism for two-Dimensional
Quadratic Gravity expressed as BF theory | 31 pages | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We examine the model of Two-Dimensional Quadratic Gravity as a consequence of
symmetry breaking within the framework of background field (BF) theory. This
theory is essentially an extension of BF theory, introducing an additional
polynomial term that operates on both the gauge and background fields. We
analyze the th... | [
{
"created": "Sat, 27 Jan 2024 20:16:46 GMT",
"version": "v1"
}
] | 2024-01-30 | [
[
"Cabrera",
"Jaime Manuel",
""
],
[
"Fuentes",
"Jorge Mauricio Paulin",
""
]
] | We examine the model of Two-Dimensional Quadratic Gravity as a consequence of symmetry breaking within the framework of background field (BF) theory. This theory is essentially an extension of BF theory, introducing an additional polynomial term that operates on both the gauge and background fields. We analyze the theo... |
gr-qc/0208021 | Vladimir Ivashchuk | V.N. Melnikov, V.D. Ivashchuk | Problems of G and multidimensional models | 5 pages, Latex, subm. to Proc. of Int. Workshop in Waseda Univ | null | null | IGC-PFUR-01/2002 | gr-qc | null | The relations for G-dot in multidimensional model with Ricci-flat internal
space and multicomponent perfect fluid are obtained. A two-component example:
dust + 5-brane, is considered.
| [
{
"created": "Thu, 8 Aug 2002 07:51:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Melnikov",
"V. N.",
""
],
[
"Ivashchuk",
"V. D.",
""
]
] | The relations for G-dot in multidimensional model with Ricci-flat internal space and multicomponent perfect fluid are obtained. A two-component example: dust + 5-brane, is considered. |
1005.4286 | Rabin Banerjee | Rabin Banerjee | From black holes to emergent gravity | Latex, 6 pages, Gravity Research Foundation essay 2010 (Received
Honorable Mention) | Int.J.Mod.Phys.D19:2365-2369,2010 | 10.1142/S0218271810018475 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many inequivalent approaches to study black holes yield identical results.
Any meaningful theory of gravity should explain the origin of this property.
Here we show that the basic holomorphic modes characterising the underlying two
dimensional conformal symmetry near the horizon bring about this universality.
Moreove... | [
{
"created": "Mon, 24 May 2010 09:31:13 GMT",
"version": "v1"
}
] | 2011-01-31 | [
[
"Banerjee",
"Rabin",
""
]
] | Many inequivalent approaches to study black holes yield identical results. Any meaningful theory of gravity should explain the origin of this property. Here we show that the basic holomorphic modes characterising the underlying two dimensional conformal symmetry near the horizon bring about this universality. Moreover ... |
gr-qc/0108012 | Robert J. Low | Robert J Low | Stable singularities of wave-fronts in general relativity | 5 pages | J.Math.Phys. 39 (1998) 3332-3335 | 10.1063/1.532257 | null | gr-qc | null | A wave-front in a space-time $\cal M$ is a family of null geodesics
orthogonal to a smooth spacelike two-surface in $\cal M$; it is of some
interest to know how a wave-front can fail to be a smoothly immersed surface in
$\cal M$. In this paper we see that the space of null geodesics $\cal N$ of
$\cal M$, considered a... | [
{
"created": "Fri, 3 Aug 2001 09:01:35 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Low",
"Robert J",
""
]
] | A wave-front in a space-time $\cal M$ is a family of null geodesics orthogonal to a smooth spacelike two-surface in $\cal M$; it is of some interest to know how a wave-front can fail to be a smoothly immersed surface in $\cal M$. In this paper we see that the space of null geodesics $\cal N$ of $\cal M$, considered as ... |
gr-qc/0109013 | Roh Suan Tung | Stephen C. Anco, Roh S. Tung | Covariant Hamiltonian boundary conditions in General Relativity for
spatially bounded spacetime regions | 49 pages; published version with minor errata corrected in Eqs.
(3.55) and (3.69) | J.Math.Phys. 43 (2002) 5531-5566 | 10.1063/1.1505984 | null | gr-qc hep-th | null | We investigate the covariant Hamiltonian symplectic structure of General
Relativity for spatially bounded regions of spacetime with a fixed time-flow
vector. For existence of a well-defined Hamiltonian variational principle
taking into account a spatial boundary, it is necessary to modify the standard
Arnowitt-Deser-... | [
{
"created": "Tue, 4 Sep 2001 18:39:26 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Mar 2002 20:51:23 GMT",
"version": "v2"
},
{
"created": "Tue, 26 Nov 2002 16:22:24 GMT",
"version": "v3"
},
{
"created": "Tue, 24 Feb 2004 14:10:58 GMT",
"version": "v4"
}
] | 2015-06-25 | [
[
"Anco",
"Stephen C.",
""
],
[
"Tung",
"Roh S.",
""
]
] | We investigate the covariant Hamiltonian symplectic structure of General Relativity for spatially bounded regions of spacetime with a fixed time-flow vector. For existence of a well-defined Hamiltonian variational principle taking into account a spatial boundary, it is necessary to modify the standard Arnowitt-Deser-Mi... |
gr-qc/0205044 | Bela Szilagyi | Bela Szilagyi, and Jeffrey Winicour | Well-Posed Initial-Boundary Evolution in General Relativity | 5 pages, 6 figures; added another convergence plot to Fig. 2 + minor
changes | Phys.Rev.D68:041501,2003 | 10.1103/PhysRevD.68.041501 | null | gr-qc | null | Maximally dissipative boundary conditions are applied to the initial-boundary
value problem for Einstein's equations in harmonic coordinates to show that it
is well-posed for homogeneous boundary data and for boundary data that is small
in a linearized sense. The method is implemented as a nonlinear evolution code
wh... | [
{
"created": "Fri, 10 May 2002 21:11:40 GMT",
"version": "v1"
},
{
"created": "Tue, 21 May 2002 00:12:42 GMT",
"version": "v2"
},
{
"created": "Thu, 30 May 2002 20:12:35 GMT",
"version": "v3"
},
{
"created": "Thu, 24 Oct 2002 15:49:29 GMT",
"version": "v4"
},
{
"c... | 2011-04-21 | [
[
"Szilagyi",
"Bela",
""
],
[
"Winicour",
"Jeffrey",
""
]
] | Maximally dissipative boundary conditions are applied to the initial-boundary value problem for Einstein's equations in harmonic coordinates to show that it is well-posed for homogeneous boundary data and for boundary data that is small in a linearized sense. The method is implemented as a nonlinear evolution code whic... |
1605.01246 | Christine Cordula Dantas | Christine C. Dantas (IAE/DCTA-Brazil) | An Inhomogeneous Space-Time Patching Model Based on a Nonlocal and
Nonlinear Schrodinger Equation | 29 pages, 2 figures, accepted for publication in Foundations of
Physics | null | 10.1007/s10701-016-0019-6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider an integrable, nonlocal and nonlinear, Schr\"odinger equation
(NNSE) as a model for building space-time patchings in inhomogeneous loop
quantum cosmology (LQC). We briefly review exact solutions of the NNSE,
specially those obtained through "geometric equivalence" methods. Furthemore,
we argue that the in... | [
{
"created": "Wed, 4 May 2016 12:27:19 GMT",
"version": "v1"
}
] | 2016-06-29 | [
[
"Dantas",
"Christine C.",
"",
"IAE/DCTA-Brazil"
]
] | We consider an integrable, nonlocal and nonlinear, Schr\"odinger equation (NNSE) as a model for building space-time patchings in inhomogeneous loop quantum cosmology (LQC). We briefly review exact solutions of the NNSE, specially those obtained through "geometric equivalence" methods. Furthemore, we argue that the inte... |
2304.01673 | Josu Aurrekoetxea | Josu C. Aurrekoetxea, Katy Clough, Francesco Muia | Oscillon formation during inflationary preheating with general
relativity | 7 pages. 4 figures. Movie: https://youtu.be/vTl9agMfPB0. Matches
version published in PRD | null | 10.1103/PhysRevD.108.023501 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | We study the non-perturbative evolution of inflationary fluctuations during
preheating using fully non-linear general-relativistic field-theory
simulations. We choose a single-field inflationary model that is consistent
with observational constraints and start the simulations at the end of
inflation with fluctuations... | [
{
"created": "Tue, 4 Apr 2023 09:59:21 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Jul 2023 22:11:01 GMT",
"version": "v2"
}
] | 2023-07-19 | [
[
"Aurrekoetxea",
"Josu C.",
""
],
[
"Clough",
"Katy",
""
],
[
"Muia",
"Francesco",
""
]
] | We study the non-perturbative evolution of inflationary fluctuations during preheating using fully non-linear general-relativistic field-theory simulations. We choose a single-field inflationary model that is consistent with observational constraints and start the simulations at the end of inflation with fluctuations b... |
2203.03295 | Francisco Lobo | Francisco S. N. Lobo, Tiberiu Harko | Curvature-matter couplings in modified gravity: from linear models to
conformally invariant theories | 20 pages, no figures; based on a plenary talk in the 4th PU
International Conference on Gravitation and Cosmology, 22-25 Nov., 2021;
accepted for published in IJMPD (proceedings) | Int.J.Mod.Phys.D 31 (2022) 11, 2240010 | 10.1142/S0218271822400107 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this proceeding, we review modified theories of gravity with a
curvature-matter coupling between an arbitrary function of the scalar curvature
and the Lagrangian density of matter. This explicit nonminimal coupling induces
a non-vanishing covariant derivative of the energy-momentum tensor, that
implies non-geodesi... | [
{
"created": "Mon, 7 Mar 2022 11:16:32 GMT",
"version": "v1"
}
] | 2022-09-20 | [
[
"Lobo",
"Francisco S. N.",
""
],
[
"Harko",
"Tiberiu",
""
]
] | In this proceeding, we review modified theories of gravity with a curvature-matter coupling between an arbitrary function of the scalar curvature and the Lagrangian density of matter. This explicit nonminimal coupling induces a non-vanishing covariant derivative of the energy-momentum tensor, that implies non-geodesic ... |
2005.07650 | Burkhard Kleihaus | Burkhard Kleihaus, Jutta Kunz, Panagiota Kanti | Properties of ultra-compact particle-like solutions in
Einstein-scalar-Gauss-Bonnet theories | 29 pages, 15 figures | Phys. Rev. D 102, 024070 (2020) | 10.1103/PhysRevD.102.024070 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Besides scalarized black holes and wormholes, Einstein-scalar-Gauss-Bonnet
theories allow also for particle-like solutions. The scalar field of these
particle-like solutions diverges at the origin, akin to the divergence of the
Coulomb potential at the location of a charged particle. However, these
particle-like solu... | [
{
"created": "Fri, 15 May 2020 17:10:12 GMT",
"version": "v1"
}
] | 2020-07-29 | [
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Kanti",
"Panagiota",
""
]
] | Besides scalarized black holes and wormholes, Einstein-scalar-Gauss-Bonnet theories allow also for particle-like solutions. The scalar field of these particle-like solutions diverges at the origin, akin to the divergence of the Coulomb potential at the location of a charged particle. However, these particle-like soluti... |
1005.4988 | Subenoy Chakraborty | Nairwita Mazumder, Subenoy Chakraborty | Validity of the Generalized Second Law of Thermodynamics of the Universe
Bounded by the Event Horizon in Brane Scenario | 8 pages, the paper has been accepted in EPJC for publication.
Conclusion has been modified an some references have been added | Eur.Phys.J.C70:329-334,2010 | 10.1140/epjc/s10052-010-1435-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we examine the validity of the generalized second law of
thermodynamics (GSLT) of the universe bounded by the event horizon in
brane-world gravity. Here we consider homogeneous and isotropic model of the
universe filled with perfect fluid in one case and in another case holographic
dark energy model of... | [
{
"created": "Thu, 27 May 2010 05:57:21 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Sep 2010 10:48:18 GMT",
"version": "v2"
}
] | 2011-02-09 | [
[
"Mazumder",
"Nairwita",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | In this paper, we examine the validity of the generalized second law of thermodynamics (GSLT) of the universe bounded by the event horizon in brane-world gravity. Here we consider homogeneous and isotropic model of the universe filled with perfect fluid in one case and in another case holographic dark energy model of t... |
gr-qc/9610030 | Miguel Angel Perez Sebastian | A. Feinstein and M. A. P\'erez Sebasti\'an (Dpto. Fisica Teorica,
Univ. Pais Vasco, Spain) | The Origin of the Entropy in the Universe | 18 pages. LaTeX file. Revised version, some discussions expanded,
several references added. The main results unchanged | Found.Phys.Lett. 13 (2000) 133-145 | null | null | gr-qc hep-th | null | We discuss the entropy generation in quantum tunneling of a relativistic
particle under the influence of a time varying force with the help of squeezing
formalism. It is shown that if one associates classical coarse grained entropy
to the phase space volume, there is an inevitable entropy increase due to the
changes ... | [
{
"created": "Tue, 15 Oct 1996 13:21:27 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Oct 1996 10:22:25 GMT",
"version": "v2"
},
{
"created": "Thu, 13 Mar 1997 11:56:49 GMT",
"version": "v3"
}
] | 2008-02-03 | [
[
"Feinstein",
"A.",
"",
"Dpto. Fisica Teorica,\n Univ. Pais Vasco, Spain"
],
[
"Sebastián",
"M. A. Pérez",
"",
"Dpto. Fisica Teorica,\n Univ. Pais Vasco, Spain"
]
] | We discuss the entropy generation in quantum tunneling of a relativistic particle under the influence of a time varying force with the help of squeezing formalism. It is shown that if one associates classical coarse grained entropy to the phase space volume, there is an inevitable entropy increase due to the changes in... |
gr-qc/0008037 | A. Puncher | C.G. Hewitt, R. Bridson and J. Wainwright | The asymptotic regimes of tilted Bianchi II cosmologies | null | Gen.Rel.Grav. 33 (2001) 65-94 | 10.1023/A:1002075902953 | null | gr-qc | null | In this paper we give, for the first time, a complete description of the
dynamics of tilted spatially homogeneous cosmologies of Bianchi type II. The
source is assumed to be a perfect fluid with equation of state $p = (\gamma -1)
\mu$, where $\gamma$ is a constant. We show that unless the perfect fluid is
stiff, the ... | [
{
"created": "Tue, 15 Aug 2000 17:42:44 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Hewitt",
"C. G.",
""
],
[
"Bridson",
"R.",
""
],
[
"Wainwright",
"J.",
""
]
] | In this paper we give, for the first time, a complete description of the dynamics of tilted spatially homogeneous cosmologies of Bianchi type II. The source is assumed to be a perfect fluid with equation of state $p = (\gamma -1) \mu$, where $\gamma$ is a constant. We show that unless the perfect fluid is stiff, the ti... |
gr-qc/0005081 | null | Andrzej Krasinski (N. Copernicus Astronomical Center and College of
Science, Polish Academy of Sciences, Warszawa, Poland) | The newest release of the Ortocartan set of programs for algebraic
calculations in relativity | 16 pages, LaTeX, no figures, accepted for publication in GRG. In the
earlier version, equivalent formulae quoted from different computer printouts
were differently ordered. Now all orderings are the same, and a few typos
have been corrected. Subjects: Algebraic computing, general relativity | Gen.Rel.Grav. 33 (2001) 145-161 | 10.1023/A:1002028019791 | null | gr-qc | null | The program Ortocartan for algebraic calculations in relativity has just been
implemented in the Codemist Standard Lisp and can now be used under the Windows
98 and Linux operating systems. The paper describes the new facilities and
subprograms that have been implemented since the previous release in 1992.
These are:... | [
{
"created": "Thu, 18 May 2000 10:47:38 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jul 2000 15:13:16 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Krasinski",
"Andrzej",
"",
"N. Copernicus Astronomical Center and College of\n Science, Polish Academy of Sciences, Warszawa, Poland"
]
] | The program Ortocartan for algebraic calculations in relativity has just been implemented in the Codemist Standard Lisp and can now be used under the Windows 98 and Linux operating systems. The paper describes the new facilities and subprograms that have been implemented since the previous release in 1992. These are: t... |
2103.11613 | Bibhas Majhi Ranjan | Surojit Dalui, Bibhas Ranjan Majhi | Horizon thermalization of Kerr black hole through local instability | Minor changes, to appear in Phys. Lett. B | null | 10.1016/j.physletb.2022.136899 | null | gr-qc hep-th nlin.CD quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The validity of our already proposed conjecture -- {\it horizon creates a
local instability which acts as the source of the quantum temperature of black
hole} -- is being tested here for Kerr black hole. Earlier this has been
explicitly shown for spherically symmetric static black hole (SSS BH). The more
realistic si... | [
{
"created": "Mon, 22 Mar 2021 06:50:58 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jan 2022 11:42:30 GMT",
"version": "v2"
}
] | 2022-01-19 | [
[
"Dalui",
"Surojit",
""
],
[
"Majhi",
"Bibhas Ranjan",
""
]
] | The validity of our already proposed conjecture -- {\it horizon creates a local instability which acts as the source of the quantum temperature of black hole} -- is being tested here for Kerr black hole. Earlier this has been explicitly shown for spherically symmetric static black hole (SSS BH). The more realistic situ... |
1601.04558 | Shuang Nan Zhang | Shuang-Nan Zhang | Testing Einstein's Equivalence Principle with Cosmological Fast Radio
Bursts behind Clusters of Galaxies | 2 pages; submitted to A&A research note on Jan. 13th, 2016 | null | null | null | gr-qc astro-ph.CO astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Aims: Recently, cosmological fast radio bursts (FRBs) have been used to
provide the most stringent limit up to date on Einstein's Equivalence Principle
(EEP). We study how to further test EEP with FRBs. Methods: Future systematic
radio surveys will certainly find abundant FRBs at cosmological distances and
some of th... | [
{
"created": "Fri, 15 Jan 2016 02:49:11 GMT",
"version": "v1"
}
] | 2016-01-19 | [
[
"Zhang",
"Shuang-Nan",
""
]
] | Aims: Recently, cosmological fast radio bursts (FRBs) have been used to provide the most stringent limit up to date on Einstein's Equivalence Principle (EEP). We study how to further test EEP with FRBs. Methods: Future systematic radio surveys will certainly find abundant FRBs at cosmological distances and some of them... |
1601.02838 | Rudolf A. Frick | Rudolf Frick | A model of the two-dimensional quantum harmonic oscillator in an $AdS_3$
background | 9 pages | Eur. Phys. C (2016) 76:551 | 10.1140/epjc/s10052-016-4381-5 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study a model of the two-dimensional quantum harmonic
oscillator in a 3-dimensional anti-de Sitter background. We use a generalized
Schr\"odinger picture in which the analogs of the Schr\"odinger operators of
the particle are independent of both the time and the space coordinates in
different represe... | [
{
"created": "Tue, 12 Jan 2016 12:56:04 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jun 2016 13:14:05 GMT",
"version": "v2"
}
] | 2016-10-28 | [
[
"Frick",
"Rudolf",
""
]
] | In this paper we study a model of the two-dimensional quantum harmonic oscillator in a 3-dimensional anti-de Sitter background. We use a generalized Schr\"odinger picture in which the analogs of the Schr\"odinger operators of the particle are independent of both the time and the space coordinates in different represent... |
1811.05041 | Che-Yu Chen | Imanol Albarran, Mariam Bouhmadi-L\'opez, Che-Yu Chen, Pisin Chen | Quantum cosmology of Eddington-Born-Infeld gravity fed by a scalar
field: the big rip case | 12 pages | null | null | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the quantum avoidance of the big rip singularity in the
Eddington-inspired-Born-Infeld (EiBI) phantom model. Instead of considering a
simple phantom dark energy component, which is described by a perfect fluid, we
consider a more fundamental degree of freedom corresponding to a phantom scalar
field with its ... | [
{
"created": "Mon, 12 Nov 2018 23:20:33 GMT",
"version": "v1"
}
] | 2018-11-14 | [
[
"Albarran",
"Imanol",
""
],
[
"Bouhmadi-López",
"Mariam",
""
],
[
"Chen",
"Che-Yu",
""
],
[
"Chen",
"Pisin",
""
]
] | We study the quantum avoidance of the big rip singularity in the Eddington-inspired-Born-Infeld (EiBI) phantom model. Instead of considering a simple phantom dark energy component, which is described by a perfect fluid, we consider a more fundamental degree of freedom corresponding to a phantom scalar field with its co... |
0910.5439 | Ricardo E. Gamboa Saravi | Ricardo E. Gamboa Saravi, Marcela Sanmartino and Philippe Tchamitchian | An alternative well-posedness property and static spacetimes with naked
singularities | 34 pages, 3 figures. Accepted for publication in Class. Quantum Grav | Class.Quant.Grav.27:215016,2010 | 10.1088/0264-9381/27/21/215016 | null | gr-qc math-ph math.MP math.SP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the first part of this paper, we show that the Cauchy problem for wave
propagation in some static spacetimes presenting a singular time-like boundary
is well posed, if we only demand the waves to have finite energy, although no
boundary condition is required. This feature does not come from essential
self-adjointn... | [
{
"created": "Wed, 28 Oct 2009 17:14:22 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Sep 2010 20:13:21 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Saravi",
"Ricardo E. Gamboa",
""
],
[
"Sanmartino",
"Marcela",
""
],
[
"Tchamitchian",
"Philippe",
""
]
] | In the first part of this paper, we show that the Cauchy problem for wave propagation in some static spacetimes presenting a singular time-like boundary is well posed, if we only demand the waves to have finite energy, although no boundary condition is required. This feature does not come from essential self-adjointnes... |
0802.3232 | Sergey G. Klimenko | S.Klimenko, I.Yakushin, A.Mercer, G.Mitselmakher | Coherent method for detection of gravitational wave bursts | 11 pages, 3 figures, proceedings of Amaldi conference in Sydney,
Australia | Class.Quant.Grav.25:114029,2008 | 10.1088/0264-9381/25/11/114029 | LIGO-P070093-00-Z | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a coherent network algorithm for detection and reconstruction of
gravitational wave bursts. The algorithm works for two and more arbitrarily
aligned detectors and can be used for both all-sky and triggered burst
searches. We describe the main components of the algorithm, including the
time-frequency analy... | [
{
"created": "Thu, 21 Feb 2008 23:03:50 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Feb 2008 16:35:33 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Klimenko",
"S.",
""
],
[
"Yakushin",
"I.",
""
],
[
"Mercer",
"A.",
""
],
[
"Mitselmakher",
"G.",
""
]
] | We describe a coherent network algorithm for detection and reconstruction of gravitational wave bursts. The algorithm works for two and more arbitrarily aligned detectors and can be used for both all-sky and triggered burst searches. We describe the main components of the algorithm, including the time-frequency analysi... |
1101.0202 | Changhong Li | Changhong Li, Lingfei Wang and Yeuk-Kwan E. Cheung (Nanjing U.,
Physics) | Bound to bounce: a coupled scalar-tachyon model for a smooth
bouncing/cyclic universe | Extensive revision with comprehensive analytic and numerical studies
of the locked inflation, the tachyon matter dominated process--rolling
expansion, turnaround and contraction--as well as subsequent deflation and
bounce process carefully presented. 31 pages and 21 figures | null | null | NITS-PHY-2010001 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a string-inspired model for a bouncing/cyclic universe,
utilizing the scalar-tachyon coupling as well as contribution from curvature in
a closed universe. The universe undergoes the locked inflation, tachyon matter
dominated rolling expansion, turnaround and contraction, as well as the
subsequent deflati... | [
{
"created": "Fri, 31 Dec 2010 05:10:15 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Jan 2014 11:37:45 GMT",
"version": "v2"
}
] | 2014-01-22 | [
[
"Li",
"Changhong",
"",
"Nanjing U.,\n Physics"
],
[
"Wang",
"Lingfei",
"",
"Nanjing U.,\n Physics"
],
[
"Cheung",
"Yeuk-Kwan E.",
"",
"Nanjing U.,\n Physics"
]
] | We introduce a string-inspired model for a bouncing/cyclic universe, utilizing the scalar-tachyon coupling as well as contribution from curvature in a closed universe. The universe undergoes the locked inflation, tachyon matter dominated rolling expansion, turnaround and contraction, as well as the subsequent deflation... |
1005.1404 | Deyou Chen | Deyou Chen, Peng Wang, Houwen Wu and Haitang Yang | Hidden conformal symmetry of rotating charged black holes | minor changes, accepted version | Gen.Rel.Grav.43:181-190,2011 | 10.1007/s10714-010-1080-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the recent work of the hidden conformal symmetry of the Kerr
black hole, we investigate the hidden conformal symmetry of a Kerr-Sen black
hole and a Kerr-Newman-Kasuya black hole. Our result shows the conformal
symmetry is spontaneously broken due to the periodicity of the azimuthal angle.
The absorption... | [
{
"created": "Sun, 9 May 2010 14:52:39 GMT",
"version": "v1"
},
{
"created": "Sat, 22 May 2010 16:53:56 GMT",
"version": "v2"
},
{
"created": "Fri, 13 Aug 2010 13:13:10 GMT",
"version": "v3"
},
{
"created": "Tue, 17 Aug 2010 03:30:14 GMT",
"version": "v4"
}
] | 2011-03-04 | [
[
"Chen",
"Deyou",
""
],
[
"Wang",
"Peng",
""
],
[
"Wu",
"Houwen",
""
],
[
"Yang",
"Haitang",
""
]
] | Motivated by the recent work of the hidden conformal symmetry of the Kerr black hole, we investigate the hidden conformal symmetry of a Kerr-Sen black hole and a Kerr-Newman-Kasuya black hole. Our result shows the conformal symmetry is spontaneously broken due to the periodicity of the azimuthal angle. The absorption a... |
1103.4660 | Ahmad Borzou | Ahmad Borzou | A Five Dimensional Space Without Local Lorentz Invariance | 9 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A five dimensional space without invariance under local Lorentz
transformations is studied, and the transformations under which the theory is
invariant are introduced. We show that the Lorentz force is included in the
ensuing equations of motion. The four dimensional Einstein and Maxwell
equations emerge from the fie... | [
{
"created": "Thu, 24 Mar 2011 01:29:44 GMT",
"version": "v1"
}
] | 2011-03-25 | [
[
"Borzou",
"Ahmad",
""
]
] | A five dimensional space without invariance under local Lorentz transformations is studied, and the transformations under which the theory is invariant are introduced. We show that the Lorentz force is included in the ensuing equations of motion. The four dimensional Einstein and Maxwell equations emerge from the field... |
2007.09797 | Zacharias Roupas | Zacharias Roupas, Gamal G. L. Nashed | Anisotropic Neutron Stars Modelling: Constraints in Krori-Barua
Spacetime | Revised version includes more data | The European Physical Journal C, 80, 905 (2020) | 10.1140/epjc/s10052-020-08462-1 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dense nuclear matter is expected to be anisotropic due to effects such as
solidification, superfluidity, strong magnetic fields, hyperons,
pion-condesation. Therefore an anisotropic neutron star core seems more
realistic than an ideally isotropic one. We model anisotropic neutron stars
working in the Krori-Barua (KB)... | [
{
"created": "Sun, 19 Jul 2020 22:08:17 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Oct 2020 14:27:49 GMT",
"version": "v2"
}
] | 2020-10-02 | [
[
"Roupas",
"Zacharias",
""
],
[
"Nashed",
"Gamal G. L.",
""
]
] | Dense nuclear matter is expected to be anisotropic due to effects such as solidification, superfluidity, strong magnetic fields, hyperons, pion-condesation. Therefore an anisotropic neutron star core seems more realistic than an ideally isotropic one. We model anisotropic neutron stars working in the Krori-Barua (KB) a... |
1805.09672 | Arif Shaikh Md | Md Arif Shaikh | Nonlinear variations in spherically symmetric accretion in the
Schwarzschild metric | 9 pages, 1 figure, comments are welcome | null | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we study the implications of nonlinearity in general
relativistic spherically symmetric inviscid irrotational accretion flow in a
stationary non-rotating spacetime. It has been found that the perturbation
scheme leads to a differential equation of the form of general Li{\'e}nard's
equation. We discuss t... | [
{
"created": "Tue, 22 May 2018 15:39:36 GMT",
"version": "v1"
}
] | 2018-05-25 | [
[
"Shaikh",
"Md Arif",
""
]
] | In this work, we study the implications of nonlinearity in general relativistic spherically symmetric inviscid irrotational accretion flow in a stationary non-rotating spacetime. It has been found that the perturbation scheme leads to a differential equation of the form of general Li{\'e}nard's equation. We discuss the... |
2206.09404 | Daisuke Yoshida | Kimihiro Nomura, Daisuke Yoshida | Implications of the singularity theorem for the size of a nonsingular
universe | 11 pages, 3 figures, published version | Phys.Rev.D 106 (2022) 12, 124016 | 10.1103/PhysRevD.106.124016 | KOBE-COSMO-22-06 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A general property of universes without initial singularity is investigated
based on the singularity theorem, assuming the null convergence condition and
the global hyperbolicity. As a direct consequence of the singularity theorem,
the universal covering of a Cauchy surface of a nonsingular universe with a
past trapp... | [
{
"created": "Sun, 19 Jun 2022 13:50:24 GMT",
"version": "v1"
},
{
"created": "Fri, 6 Jan 2023 12:28:26 GMT",
"version": "v2"
}
] | 2023-01-09 | [
[
"Nomura",
"Kimihiro",
""
],
[
"Yoshida",
"Daisuke",
""
]
] | A general property of universes without initial singularity is investigated based on the singularity theorem, assuming the null convergence condition and the global hyperbolicity. As a direct consequence of the singularity theorem, the universal covering of a Cauchy surface of a nonsingular universe with a past trapped... |
2201.02971 | Yan-Gang Miao | Yang Guo, Chen Lan and Yan-Gang Miao | Bounce corrections to gravitational lensing, quasinormal spectral
stability and gray-body factors of Reissner-Nordstr\"om black holes | v1: 8 pages, 2 figures, 2 tables; v2: references added; v3: 16 pages,
four tables, one author, two appendixes, clarifications, and references
added, final version to appear in Physical Review D | Phys. Rev. D 106, 124052 (2022) | 10.1103/PhysRevD.106.124052 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational lensing in the weak field limit, quasinormal spectra, and
gray-body factors are investigated in the Reissner-Nordstr\"om spacetime
corrected by bounce parameters. Using the Gauss-Bonnet theorem, we analyze the
effects of bounce corrections to the weak gravitational deflection angle and
find that the div... | [
{
"created": "Sun, 9 Jan 2022 09:38:35 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Jan 2022 05:40:17 GMT",
"version": "v2"
},
{
"created": "Sun, 1 Jan 2023 09:20:07 GMT",
"version": "v3"
}
] | 2023-01-03 | [
[
"Guo",
"Yang",
""
],
[
"Lan",
"Chen",
""
],
[
"Miao",
"Yan-Gang",
""
]
] | Gravitational lensing in the weak field limit, quasinormal spectra, and gray-body factors are investigated in the Reissner-Nordstr\"om spacetime corrected by bounce parameters. Using the Gauss-Bonnet theorem, we analyze the effects of bounce corrections to the weak gravitational deflection angle and find that the diver... |
1011.6286 | Mayeul Arminjon | Mayeul Arminjon and Frank Reifler | Representations of the Dirac wave function in a curved spacetime | 14 pages (standard 12pt article). Text of a talk given at DICE2010:
"Space-Time-Matter - current issues in quantum mechanics and beyond"
(Castiglioncello, Italy, September 13-17, 2010) | J.Phys.Conf.Ser.306:012061,2011 | 10.1088/1742-6596/306/1/012061 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Dirac wave function in a curved spacetime is usually defined as a
quadruplet of scalar fields. It can alternatively be defined as a four-vector
field. We describe these two representations in a common geometrical framework
and we prove theorems that relate together the different representations and
the different ... | [
{
"created": "Mon, 29 Nov 2010 16:45:56 GMT",
"version": "v1"
}
] | 2011-10-05 | [
[
"Arminjon",
"Mayeul",
""
],
[
"Reifler",
"Frank",
""
]
] | The Dirac wave function in a curved spacetime is usually defined as a quadruplet of scalar fields. It can alternatively be defined as a four-vector field. We describe these two representations in a common geometrical framework and we prove theorems that relate together the different representations and the different ch... |
1306.6554 | Jiri Podolsky | Jiri Podolsky, Robert Svarc | Physical interpretation of Kundt spacetimes using geodesic deviation | 24 pages, 5 figures | Class.Quant.Grav.30:205016,2013 | 10.1088/0264-9381/30/20/205016 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the fully general class of non-expanding, non-twisting and
shear-free D-dimensional geometries using the invariant form of geodesic
deviation equation which describes the relative motion of free test particles.
We show that the local effect of such gravitational fields on the particles
basically consis... | [
{
"created": "Thu, 27 Jun 2013 15:57:49 GMT",
"version": "v1"
}
] | 2014-06-04 | [
[
"Podolsky",
"Jiri",
""
],
[
"Svarc",
"Robert",
""
]
] | We investigate the fully general class of non-expanding, non-twisting and shear-free D-dimensional geometries using the invariant form of geodesic deviation equation which describes the relative motion of free test particles. We show that the local effect of such gravitational fields on the particles basically consists... |
2302.07997 | Alberto Escalante | Alberto Escalante (Puebla U., Inst. Fis.), Victor Alberto Zavala-Perez
(Puebla U., Inst. Fis.) | Analysis of linearized Weyl gravity via the Hamilton-Jacobi method | null | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/publicdomain/zero/1.0/ | The Hamilton-Jacobi formalism is used to analyze the Weyl theory in the
weak-field limit. The complete set of involutive Hamiltonians is obtained,
which are classified into involutive and non-involutive. The counting of
degrees of freedom is performed. Additionally, the generalized brackets and
gauge symmetries are r... | [
{
"created": "Thu, 16 Feb 2023 00:07:17 GMT",
"version": "v1"
}
] | 2023-02-17 | [
[
"Escalante",
"Alberto",
"",
"Puebla U., Inst. Fis."
],
[
"Zavala-Perez",
"Victor Alberto",
"",
"Puebla U., Inst. Fis."
]
] | The Hamilton-Jacobi formalism is used to analyze the Weyl theory in the weak-field limit. The complete set of involutive Hamiltonians is obtained, which are classified into involutive and non-involutive. The counting of degrees of freedom is performed. Additionally, the generalized brackets and gauge symmetries are rep... |
1509.05782 | Kevin Barkett | Kevin Barkett, Mark A. Scheel, Roland Haas, Christian D. Ott,
Sebastiano Bernuzzi, Duncan A. Brown, B\'ela Szil\'agyi, Jeffrey D. Kaplan,
Jonas Lippuner, Curran D. Muhlberger, Francois Foucart, and Matthew D. Duez | Gravitational waveforms for neutron star binaries from binary black hole
simulations | 7 pages, 3 figures; updated acknowledgements; published PRD version | Phys. Rev. D 93, 044064 (2016) | 10.1103/PhysRevD.93.044064 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves from binary neutron star (BNS) and black hole/neutron
star (BHNS) inspirals are primary sources for detection by the Advanced Laser
Interferometer Gravitational-Wave Observatory. The tidal forces acting on the
neutron stars induce changes in the phase evolution of the gravitational
waveform, and t... | [
{
"created": "Fri, 18 Sep 2015 20:05:46 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Sep 2015 20:21:30 GMT",
"version": "v2"
},
{
"created": "Thu, 25 Feb 2016 21:47:57 GMT",
"version": "v3"
}
] | 2016-02-29 | [
[
"Barkett",
"Kevin",
""
],
[
"Scheel",
"Mark A.",
""
],
[
"Haas",
"Roland",
""
],
[
"Ott",
"Christian D.",
""
],
[
"Bernuzzi",
"Sebastiano",
""
],
[
"Brown",
"Duncan A.",
""
],
[
"Szilágyi",
"Béla",
""
],
... | Gravitational waves from binary neutron star (BNS) and black hole/neutron star (BHNS) inspirals are primary sources for detection by the Advanced Laser Interferometer Gravitational-Wave Observatory. The tidal forces acting on the neutron stars induce changes in the phase evolution of the gravitational waveform, and the... |
1808.03619 | Chris Pankow | Chris Pankow, Katerina Chatziioannou, Eve A. Chase, Tyson B.
Littenberg, Matthew Evans, Jessica McIver, Neil J. Cornish, Carl-Johan
Haster, Jonah Kanner, Vivien Raymond, Salvatore Vitale, Aaron Zimmerman | Mitigation of the instrumental noise transient in gravitational-wave
data surrounding GW170817 | 11 pages, 3 figures, accepted in PRD | Phys. Rev. D 98, 084016 (2018) | 10.1103/PhysRevD.98.084016 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the coming years gravitational-wave detectors will undergo a series of
improvements, with an increase in their detection rate by about an order of
magnitude. Routine detections of gravitational-wave signals promote novel
astrophysical and fundamental theory studies, while simultaneously leading to
an increase in t... | [
{
"created": "Fri, 10 Aug 2018 16:54:58 GMT",
"version": "v1"
},
{
"created": "Sat, 20 Oct 2018 18:50:04 GMT",
"version": "v2"
}
] | 2018-10-23 | [
[
"Pankow",
"Chris",
""
],
[
"Chatziioannou",
"Katerina",
""
],
[
"Chase",
"Eve A.",
""
],
[
"Littenberg",
"Tyson B.",
""
],
[
"Evans",
"Matthew",
""
],
[
"McIver",
"Jessica",
""
],
[
"Cornish",
"Neil J.",
""... | In the coming years gravitational-wave detectors will undergo a series of improvements, with an increase in their detection rate by about an order of magnitude. Routine detections of gravitational-wave signals promote novel astrophysical and fundamental theory studies, while simultaneously leading to an increase in the... |
1807.11420 | Seramika Ariwahjoedi | Seramika Ariwahjoedi, Freddy P. Zen | Contracted Bianchi Identity and Angle Relation on n-dimensional
Simplicial Complex of Regge Calculus | 16 pages | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this article, we prove the theorems concerning the trace relation of
SO(3), SU(2), and SO(n) which are representation of SO(3) and SU(2). An
interesting fact we found is the trace relation of SU(2) gives the spherical
law of cosine which in turns is a dihedral angle relation, a constraint that
must be satisfied by... | [
{
"created": "Mon, 30 Jul 2018 16:19:24 GMT",
"version": "v1"
}
] | 2018-08-07 | [
[
"Ariwahjoedi",
"Seramika",
""
],
[
"Zen",
"Freddy P.",
""
]
] | In this article, we prove the theorems concerning the trace relation of SO(3), SU(2), and SO(n) which are representation of SO(3) and SU(2). An interesting fact we found is the trace relation of SU(2) gives the spherical law of cosine which in turns is a dihedral angle relation, a constraint that must be satisfied by c... |
0912.1609 | Vladimir Popov | V. A. Popov | Dark Energy and Dark Matter unification via superfluid Chaplygin gas | 13 pages, 3 figures | Phys.Lett.B686:211-215, 2010 | 10.1016/j.physletb.2010.02.035 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new model describing the dark sector of the universe is established. The
model involves Bose-Einstein condensate (BEC) as dark energy (DE) and an
excited state above it as dark matter (DM). The condensate is assumed to have a
negative pressure and is embodied as an exotic fluid with Chaplygin equation of
state. Exc... | [
{
"created": "Tue, 8 Dec 2009 21:11:28 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Mar 2010 05:47:13 GMT",
"version": "v2"
},
{
"created": "Sun, 22 May 2011 10:48:36 GMT",
"version": "v3"
}
] | 2011-05-24 | [
[
"Popov",
"V. A.",
""
]
] | A new model describing the dark sector of the universe is established. The model involves Bose-Einstein condensate (BEC) as dark energy (DE) and an excited state above it as dark matter (DM). The condensate is assumed to have a negative pressure and is embodied as an exotic fluid with Chaplygin equation of state. Excit... |
1911.06628 | Yiqian Chen | Yiqian Chen, Qingyu Gan, Guangzhou Guo | Strong Cosmic Censorship for a Scalar Field in a Logarithmic-de Sitter
Black Hole | 21 pages, 5 figures, 1 table | null | 10.1088/1572-9494/ab6912 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been shown that the quasinormal modes of perturebated fields can be
used to investigate the validity of strong cosmic censorship (SCC). Relevant
issues for Reissner-Nordstrom-de Sitter (RNdS) black holes and Born-Infeld-de
Sitter (BI-dS) black holes have been discussed. In this paper, we investigate
SCC in an ... | [
{
"created": "Fri, 15 Nov 2019 13:40:46 GMT",
"version": "v1"
}
] | 2020-04-22 | [
[
"Chen",
"Yiqian",
""
],
[
"Gan",
"Qingyu",
""
],
[
"Guo",
"Guangzhou",
""
]
] | It has been shown that the quasinormal modes of perturebated fields can be used to investigate the validity of strong cosmic censorship (SCC). Relevant issues for Reissner-Nordstrom-de Sitter (RNdS) black holes and Born-Infeld-de Sitter (BI-dS) black holes have been discussed. In this paper, we investigate SCC in an as... |
1109.1043 | Muhammad Sharif | M. Sharif and G. Abbas | Phantom Accretion onto the Schwarzschild de-Sitter Black Hole | 9 pages, no figure | Chin. Phys. Lett. 28(2011)090402 | 10.1088/0256-307X/28/9/090402 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We deal with phantom energy accretion onto the Schwarzschild de-Sitter black
hole. The energy flux conservation, relativistic Bernoulli equation and mass
flux conservation equation are formulated to discuss the phantom accretion. We
discuss the conditions for critical accretion. It is found that mass of the
black hol... | [
{
"created": "Tue, 6 Sep 2011 02:18:20 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Sharif",
"M.",
""
],
[
"Abbas",
"G.",
""
]
] | We deal with phantom energy accretion onto the Schwarzschild de-Sitter black hole. The energy flux conservation, relativistic Bernoulli equation and mass flux conservation equation are formulated to discuss the phantom accretion. We discuss the conditions for critical accretion. It is found that mass of the black hole ... |
1708.08766 | Yuri Obukhov | Milutin Blagojevi\'c, Branislav Cvetkovi\'c, Yuri N. Obukhov | Generalized plane waves in Poincar\'e gauge theory of gravity | 13 pages, Rextex, Paper is dedicated to Friedrich Hehl on the
occasion of his 80th birthday, in appreciation of his contribution to the
development of gauge theories of gravity. arXiv admin note: text overlap with
arXiv:1702.05185 | null | 10.1103/PhysRevD.96.064031 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A family of exact vacuum solutions, representing generalized plane waves
propagating on the (anti-)de Sitter background, is constructed in the framework
of Poincar\'e gauge theory. The wave dynamics is defined by the general
Lagrangian that includes all parity even and parity odd invariants up to the
second order in ... | [
{
"created": "Sat, 26 Aug 2017 08:12:29 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Sep 2017 15:52:12 GMT",
"version": "v2"
}
] | 2017-09-21 | [
[
"Blagojević",
"Milutin",
""
],
[
"Cvetković",
"Branislav",
""
],
[
"Obukhov",
"Yuri N.",
""
]
] | A family of exact vacuum solutions, representing generalized plane waves propagating on the (anti-)de Sitter background, is constructed in the framework of Poincar\'e gauge theory. The wave dynamics is defined by the general Lagrangian that includes all parity even and parity odd invariants up to the second order in th... |
1304.6688 | David Sloan | Julian Rennert and David Sloan | A Homogeneous Model of Spinfoam Cosmology | 22 pages, 4 figures | Class. Quantum Grav. 30 (2013) 235019 | 10.1088/0264-9381/30/23/235019 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine spinfoam cosmology by use of a simple graph adapted to homogeneous
cosmological models. We calculate dynamics in the isotropic limit, and provide
the framework for the aniostropic case. The dynamical behaviour is calculating
transition amplitudes between holomorphic coherent states on a single node
graph. ... | [
{
"created": "Wed, 24 Apr 2013 18:21:52 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Oct 2013 19:25:58 GMT",
"version": "v2"
}
] | 2013-11-21 | [
[
"Rennert",
"Julian",
""
],
[
"Sloan",
"David",
""
]
] | We examine spinfoam cosmology by use of a simple graph adapted to homogeneous cosmological models. We calculate dynamics in the isotropic limit, and provide the framework for the aniostropic case. The dynamical behaviour is calculating transition amplitudes between holomorphic coherent states on a single node graph. Th... |
1003.3845 | Claude Warnick | G. W. Gibbons and C. M. Warnick | Dark Energy and Projective Symmetry | null | Phys.Lett.B688:337-340,2010 | 10.1016/j.physletb.2010.04.016 | DAMTP-2010-19 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nurowski [arXiv:1003.1503] has recently suggested a link between the
observation of Dark Energy in cosmology and the projective equivalence of
certain Friedman-Lemaitre-Robertson-Walker (FLRW) metrics. Specifically, he
points out that two FLRW metrics with the same unparameterized geodesics have
their energy densitie... | [
{
"created": "Fri, 19 Mar 2010 17:25:35 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Gibbons",
"G. W.",
""
],
[
"Warnick",
"C. M.",
""
]
] | Nurowski [arXiv:1003.1503] has recently suggested a link between the observation of Dark Energy in cosmology and the projective equivalence of certain Friedman-Lemaitre-Robertson-Walker (FLRW) metrics. Specifically, he points out that two FLRW metrics with the same unparameterized geodesics have their energy densities ... |
1008.0448 | Edward Glass | E.N. Glass | Gravothermal Catastrophe, an Example | To appear in Phys. Rev. D | Phys.Rev.D82:044039,2010 | 10.1103/PhysRevD.82.044039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work discusses gravothermal catastrophe in astrophysical systems and
provides an analytic collapse solution which exhibits many of the catastrophe
properties. The system collapses into a trapped surface with outgoing energy
radiated to a future boundary, and provides an example of catastrophic
collapse.
| [
{
"created": "Tue, 3 Aug 2010 03:13:51 GMT",
"version": "v1"
}
] | 2011-02-24 | [
[
"Glass",
"E. N.",
""
]
] | This work discusses gravothermal catastrophe in astrophysical systems and provides an analytic collapse solution which exhibits many of the catastrophe properties. The system collapses into a trapped surface with outgoing energy radiated to a future boundary, and provides an example of catastrophic collapse. |
gr-qc/0511136 | Koji Uryu | Koji Uryu, Francois Limousin, John L. Friedman, Eric Gourgoulhon,
Masaru Shibata | Binary neutron stars: Equilibrium models beyond spatial conformal
flatness | 4 pages, 6 figures, revised version, PRL in press | Phys.Rev.Lett. 97 (2006) 171101 | 10.1103/PhysRevLett.97.171101 | null | gr-qc astro-ph | null | Equilibria of binary neutron stars in close circular orbits are computed
numerically in a waveless formulation: The full Einstein-relativistic-Euler
system is solved on an initial hypersurface to obtain an asymptotically flat
form of the 4-metric and an extrinsic curvature whose time derivative vanishes
in a comoving... | [
{
"created": "Fri, 25 Nov 2005 13:32:24 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Oct 2006 16:13:04 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Uryu",
"Koji",
""
],
[
"Limousin",
"Francois",
""
],
[
"Friedman",
"John L.",
""
],
[
"Gourgoulhon",
"Eric",
""
],
[
"Shibata",
"Masaru",
""
]
] | Equilibria of binary neutron stars in close circular orbits are computed numerically in a waveless formulation: The full Einstein-relativistic-Euler system is solved on an initial hypersurface to obtain an asymptotically flat form of the 4-metric and an extrinsic curvature whose time derivative vanishes in a comoving f... |
1906.04847 | J\"org Hennig | J\"org Hennig | On the balance problem for two rotating and charged black holes | 17 pages, 1 figure | Class. Quantum Grav. 36, 235001 (2019) | 10.1088/1361-6382/ab4f41 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is an interesting open problem whether two non-extremal rotating and
electrically charged black holes can be in physical equilibrium, which might be
possible due to a balance between the gravitational attraction and the
spin-spin and electrical repulsions. Exact candidate solutions were
constructed, but it is uncl... | [
{
"created": "Tue, 11 Jun 2019 22:32:57 GMT",
"version": "v1"
},
{
"created": "Sun, 3 Nov 2019 21:18:35 GMT",
"version": "v2"
}
] | 2019-11-05 | [
[
"Hennig",
"Jörg",
""
]
] | It is an interesting open problem whether two non-extremal rotating and electrically charged black holes can be in physical equilibrium, which might be possible due to a balance between the gravitational attraction and the spin-spin and electrical repulsions. Exact candidate solutions were constructed, but it is unclea... |
gr-qc/9606027 | BS Kay | Claes R Cramer (York), Bernard S. Kay (York) | Stress-Energy Must be Singular on the Misner Space Horizon even for
Automorphic Fields | 10 pages, LaTeX, 2 postscript figures | Class.Quant.Grav.13:L143-L149,1996 | 10.1088/0264-9381/13/12/002 | null | gr-qc | null | We use the image sum method to reproduce Sushkov's result that for a massless
automorphic field on the initial globally hyperbolic region $IGH$ of Misner
space, one can always find a special value of the automorphic parameter
$\alpha$ such that the renormalized expectation value
$\langle\alpha|T_{ab}|\alpha\rangle$ i... | [
{
"created": "Thu, 13 Jun 1996 11:46:51 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Cramer",
"Claes R",
"",
"York"
],
[
"Kay",
"Bernard S.",
"",
"York"
]
] | We use the image sum method to reproduce Sushkov's result that for a massless automorphic field on the initial globally hyperbolic region $IGH$ of Misner space, one can always find a special value of the automorphic parameter $\alpha$ such that the renormalized expectation value $\langle\alpha|T_{ab}|\alpha\rangle$ in ... |
gr-qc/9805053 | Dan Baleanu | Dumitru Baleanu (Bogoliubov LTPH, Dubna,Russia) | Symmetries of the dual metrics | 10 pages,LATEX, content revised | null | null | null | gr-qc | null | In this paper the symmetries of the dual manifold were investigated. We found
the conditions when the manifold and its dual admit the same Killing vectors
and Killing-Yano tensors. In the case of an Einstein's metric $g_{\mu\nu}$ the
corresponding equations for its dual were found. The examples of Kerr-Newman
geometr... | [
{
"created": "Thu, 14 May 1998 00:38:46 GMT",
"version": "v1"
},
{
"created": "Sun, 31 May 1998 23:50:34 GMT",
"version": "v2"
},
{
"created": "Sun, 27 Feb 2000 15:17:11 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Baleanu",
"Dumitru",
"",
"Bogoliubov LTPH, Dubna,Russia"
]
] | In this paper the symmetries of the dual manifold were investigated. We found the conditions when the manifold and its dual admit the same Killing vectors and Killing-Yano tensors. In the case of an Einstein's metric $g_{\mu\nu}$ the corresponding equations for its dual were found. The examples of Kerr-Newman geometry ... |
1101.1641 | Yurii Ignatyev | Yu.G. Ignatyev | Gravimagnetic shock waves and gravitational-wave experiments | 31 pages, 16 figures, 3 tables, 24 references | Grav.Cosmol.2:345-360,1996 | null | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Causes of the unsatisfactory condition of the gravitational-wave experiments
are discussed and a new outlook at the detection of gravitational waves of
astrophysical origin is proposed. It is shown that there are strong grounds for
identifying the so-called giant pulses in the pulsar NP 0532 radiation with
gravimagne... | [
{
"created": "Sun, 9 Jan 2011 14:44:26 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Ignatyev",
"Yu. G.",
""
]
] | Causes of the unsatisfactory condition of the gravitational-wave experiments are discussed and a new outlook at the detection of gravitational waves of astrophysical origin is proposed. It is shown that there are strong grounds for identifying the so-called giant pulses in the pulsar NP 0532 radiation with gravimagneti... |
1704.07825 | Saulo Carneiro | S. Carneiro and H. A. Borges | Dynamical system analysis of interacting models | 6 pages, 3 figures. A section was added with an analysis of
structures growth rate and peculiar velocities. To appear in General
Relativity and Gravitation | Gen Relativ Gravit (2018) 50:1; Erratum: Gen Relativ Gravit (2018)
50: 129 | 10.1007/s10714-017-2322-8 10.1007/s10714-018-2458-1 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We perform a dynamical system analysis of a cosmological model with linear
dependence between the vacuum density and the Hubble parameter, with
constant-rate creation of dark matter. We show that the de Sitter spacetime is
an asymptotically stable critical point, future limit of any expanding
solution. Our analysis a... | [
{
"created": "Tue, 25 Apr 2017 13:13:29 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Nov 2017 15:08:25 GMT",
"version": "v2"
}
] | 2018-09-25 | [
[
"Carneiro",
"S.",
""
],
[
"Borges",
"H. A.",
""
]
] | We perform a dynamical system analysis of a cosmological model with linear dependence between the vacuum density and the Hubble parameter, with constant-rate creation of dark matter. We show that the de Sitter spacetime is an asymptotically stable critical point, future limit of any expanding solution. Our analysis als... |
2312.17198 | Athanasios Bakopoulos | Athanasios Bakopoulos, Nikos Chatzifotis, Theodoros Nakas | Compact objects with primary hair in shift and parity symmetric beyond
Horndeski gravities | 14 pages, 2 figures, typos corrected, matches published version | Phys. Rev. D 110, (2024) 024044 | 10.1103/PhysRevD.110.024044 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we delve into the model of the shift symmetric and
parity-preserving Beyond Horndeski theory in all its generality. We present an
explicit algorithm to extract static and spherically symmetric black holes with
primary scalar charge adhering to the conservation of the Noether current
emanating from the s... | [
{
"created": "Thu, 28 Dec 2023 18:31:03 GMT",
"version": "v1"
},
{
"created": "Fri, 19 Jul 2024 16:19:33 GMT",
"version": "v2"
}
] | 2024-07-22 | [
[
"Bakopoulos",
"Athanasios",
""
],
[
"Chatzifotis",
"Nikos",
""
],
[
"Nakas",
"Theodoros",
""
]
] | In this work, we delve into the model of the shift symmetric and parity-preserving Beyond Horndeski theory in all its generality. We present an explicit algorithm to extract static and spherically symmetric black holes with primary scalar charge adhering to the conservation of the Noether current emanating from the shi... |
2005.12804 | Vasilis Oikonomou | S.D. Odintsov, V.K. Oikonomou | Inflationary Attractors in $F(R)$ Gravity | PLB Accepted | null | 10.1016/j.physletb.2020.135576 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this letter we shall demonstrate that the viable $F(R)$ gravities can be
classified mainly into two classes of inflationary attractors, either the $R^2$
attractors or the $\alpha$-attractors. To show this, we shall derive the most
general relation between the tensor-to-scalar ratio $r$ and the spectral index
of pr... | [
{
"created": "Tue, 26 May 2020 15:38:42 GMT",
"version": "v1"
}
] | 2020-08-26 | [
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | In this letter we shall demonstrate that the viable $F(R)$ gravities can be classified mainly into two classes of inflationary attractors, either the $R^2$ attractors or the $\alpha$-attractors. To show this, we shall derive the most general relation between the tensor-to-scalar ratio $r$ and the spectral index of prim... |
gr-qc/0310023 | Dr. Anirudh Pradhan | Anirudh Pradhan, Purnima Pandey, G.P. Singh and R.V. Deshpandey | Causal Bulk Viscous LRS Bianchi I Models With Variable Gravitational and
Cosmological "Constant" | 9 pages, LaTex, typos added | SpacetimeandSubstance6:116-120,2005 | null | null | gr-qc | null | In this paper we have investigated an LRS Bianchi I anisotropic cosmological
model of the universe by taking time varying $G$ and $\Lambda$ in the presence
of bulk viscous fluid source described by full causal non-equilibrium
thermodynamics. We obtain a cosmological constant as a decreasing function of
time and for $... | [
{
"created": "Sat, 4 Oct 2003 06:13:35 GMT",
"version": "v1"
},
{
"created": "Sat, 23 Jul 2005 04:57:11 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Pradhan",
"Anirudh",
""
],
[
"Pandey",
"Purnima",
""
],
[
"Singh",
"G. P.",
""
],
[
"Deshpandey",
"R. V.",
""
]
] | In this paper we have investigated an LRS Bianchi I anisotropic cosmological model of the universe by taking time varying $G$ and $\Lambda$ in the presence of bulk viscous fluid source described by full causal non-equilibrium thermodynamics. We obtain a cosmological constant as a decreasing function of time and for $m,... |
1606.03282 | Ryan McManus | Ryan McManus, Lucas Lombriser, Jorge Pe\~narrubia | Finding Horndeski theories with Einstein gravity limits | 33 pages | JCAP11(2016)006 | 10.1088/1475-7516/2016/11/006 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Horndeski action is the most general scalar-tensor theory with at most
second-order derivatives in the equations of motion, thus evading Ostrogradsky
instabilities and making it of interest when modifying gravity at large scales.
To pass local tests of gravity, these modifications predominantly rely on
nonlinear ... | [
{
"created": "Fri, 10 Jun 2016 14:26:58 GMT",
"version": "v1"
}
] | 2016-12-07 | [
[
"McManus",
"Ryan",
""
],
[
"Lombriser",
"Lucas",
""
],
[
"Peñarrubia",
"Jorge",
""
]
] | The Horndeski action is the most general scalar-tensor theory with at most second-order derivatives in the equations of motion, thus evading Ostrogradsky instabilities and making it of interest when modifying gravity at large scales. To pass local tests of gravity, these modifications predominantly rely on nonlinear sc... |
2102.12747 | Geoffrey Comp\`ere | Geoffrey Comp\`ere and Lorenzo K\"uchler | Self-consistent adiabatic inspiral and transition motion | Matches the Erratum version in Physical Review Letters, 6 pages | Phys. Rev. Lett. 126, 241106 (2021) | 10.1103/PhysRevLett.126.241106 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The transition motion of a point particle around the last stable orbit of
Kerr is described at leading order in the transition-timescale expansion.
Taking systematically into account all self-force effects, we prove that the
transition motion is still described by the Painlev\'e transcendent equation of
the first kin... | [
{
"created": "Thu, 25 Feb 2021 09:17:45 GMT",
"version": "v1"
},
{
"created": "Fri, 11 Jun 2021 09:43:53 GMT",
"version": "v2"
},
{
"created": "Thu, 16 Dec 2021 14:48:01 GMT",
"version": "v3"
}
] | 2021-12-17 | [
[
"Compère",
"Geoffrey",
""
],
[
"Küchler",
"Lorenzo",
""
]
] | The transition motion of a point particle around the last stable orbit of Kerr is described at leading order in the transition-timescale expansion. Taking systematically into account all self-force effects, we prove that the transition motion is still described by the Painlev\'e transcendent equation of the first kind.... |
2311.03209 | Ernesto Nungesser | Ho Lee and Ernesto Nungesser | Future global existence of homogeneous solutions to the
Einstein-Boltzmann system with soft potentials | 40 pages, accepted in JDE version | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the Cauchy problem for the Einstein-Boltzmann system with soft
potentials in a cosmological setting. We assume the Bianchi I symmetry to
describe a spatially homogeneous, but anisotropic universe and consider a
cosmological constant $ \Lambda > 0 $ to describe an accelerated expansion of
the universe. For th... | [
{
"created": "Mon, 6 Nov 2023 15:52:16 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jul 2024 13:31:16 GMT",
"version": "v2"
}
] | 2024-07-11 | [
[
"Lee",
"Ho",
""
],
[
"Nungesser",
"Ernesto",
""
]
] | We study the Cauchy problem for the Einstein-Boltzmann system with soft potentials in a cosmological setting. We assume the Bianchi I symmetry to describe a spatially homogeneous, but anisotropic universe and consider a cosmological constant $ \Lambda > 0 $ to describe an accelerated expansion of the universe. For the ... |
gr-qc/9308030 | Yasusada Nambu | Yasusada Nambu | Fate of Inhomogeneity in Schwarzschild-deSitter Space-time | 6pages | Phys.Lett.B323:13-17,1994 | 10.1016/0370-2693(94)00034-4 | DNPU-93-32 | gr-qc astro-ph | null | We investigate the global structure of the space time with a spherically
symmetric inhomogeneity using a metric junction, and classify all possible
types. We found that a motion with a negative gravitational mass is possible
although the energy condition of the matter is not violated. Using the result,
formation of b... | [
{
"created": "Fri, 27 Aug 1993 10:30:18 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Nambu",
"Yasusada",
""
]
] | We investigate the global structure of the space time with a spherically symmetric inhomogeneity using a metric junction, and classify all possible types. We found that a motion with a negative gravitational mass is possible although the energy condition of the matter is not violated. Using the result, formation of bla... |
2208.07710 | Alireza Amani | S. Ganjizadeh, Alireza Amani, and M. A. Ramzanpour | Observational Hubble parameter data constraints on the interactive model
of $f(T)$ gravity with particle creation | 19 pages, 7 figures, Accepted in Chinese Physics C | null | 10.1088/1674-1137/ac8c22 | CPC-2022-0297.R2 | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | In this paper, we consider an open system from the thermodynamic perspective
for an adiabatic FRW universe model in which particle creation occurs within
the system. In that case, the modified continuity equation is obtained and then
we correspond it to the continuity equation of $f(T)$ gravity. So, we take
$f(T)$ gr... | [
{
"created": "Sat, 13 Aug 2022 20:35:15 GMT",
"version": "v1"
}
] | 2022-12-14 | [
[
"Ganjizadeh",
"S.",
""
],
[
"Amani",
"Alireza",
""
],
[
"Ramzanpour",
"M. A.",
""
]
] | In this paper, we consider an open system from the thermodynamic perspective for an adiabatic FRW universe model in which particle creation occurs within the system. In that case, the modified continuity equation is obtained and then we correspond it to the continuity equation of $f(T)$ gravity. So, we take $f(T)$ grav... |
2304.12831 | Anna Puecher | Maria Concetta Tringali, Anna Puecher, Claudia Lazzaro, Riccardo
Ciolfi, Marco Drago, Bruno Giacomazzo, Gabriele Vedovato and Giovanni Andrea
Prodi | Minimally modeled characterization method of postmerger gravitational
wave emission from binary neutron star coalescences | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves emitted during the coalescence of binary neutron star
systems carry information about the equation of state describing the extremely
dense matter inside neutron stars. In particular, the equation of state
determines the fate of the binary after the merger: a prompt collapse to black
hole, or the f... | [
{
"created": "Tue, 25 Apr 2023 14:02:15 GMT",
"version": "v1"
}
] | 2023-04-26 | [
[
"Tringali",
"Maria Concetta",
""
],
[
"Puecher",
"Anna",
""
],
[
"Lazzaro",
"Claudia",
""
],
[
"Ciolfi",
"Riccardo",
""
],
[
"Drago",
"Marco",
""
],
[
"Giacomazzo",
"Bruno",
""
],
[
"Vedovato",
"Gabriele",
... | Gravitational waves emitted during the coalescence of binary neutron star systems carry information about the equation of state describing the extremely dense matter inside neutron stars. In particular, the equation of state determines the fate of the binary after the merger: a prompt collapse to black hole, or the for... |
2212.06745 | Naresh Dadhich | Naresh Dadhich | On the equilibrium of the Buchdahl star | 6 pages, Title changed, abstract modified. Overall arguements and
analysis revamped and sharpened. New references added. Main result remains
unaltered | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Buchdahl star is the limiting compactness (which is indicated by
sturation of the Buchdahl bound) object without horizon. It is in general
defined by the potential felt by radially falling timelike particle, $\Phi(R) =
4/9$, in the field of a static object. On the other hand black hole is
similarly characterized ... | [
{
"created": "Sun, 11 Dec 2022 12:20:55 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Dec 2022 07:04:48 GMT",
"version": "v2"
},
{
"created": "Sat, 4 Mar 2023 15:49:31 GMT",
"version": "v3"
},
{
"created": "Thu, 9 Nov 2023 06:25:55 GMT",
"version": "v4"
}
] | 2023-11-10 | [
[
"Dadhich",
"Naresh",
""
]
] | The Buchdahl star is the limiting compactness (which is indicated by sturation of the Buchdahl bound) object without horizon. It is in general defined by the potential felt by radially falling timelike particle, $\Phi(R) = 4/9$, in the field of a static object. On the other hand black hole is similarly characterized by... |
1711.09963 | Nikolaos Kalogeropoulos | Nikolaos Kalogeropoulos | Systolic aspects of black hole entropy | 20 pages. No figures. LaTeX2e. This version: change of the author's
affiliation. Other minor changes. To be published in a Special Issue of
"Axioms" on "Theory and Mathematical Aspects of Black Holes" | Axioms 9(1), 30 (2020) | null | null | gr-qc cond-mat.stat-mech hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We attempt to provide a mesoscopic treatment of the origin of black hole
entropy in (3+1)-dimensional spacetimes. We ascribe this entropy to the
non-trivial topology of the space-like sections $\Sigma$ of the horizon. This
is not forbidden by topological censorship, since all the known energy
inequalities needed to p... | [
{
"created": "Mon, 27 Nov 2017 20:13:16 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Apr 2018 07:23:14 GMT",
"version": "v2"
},
{
"created": "Wed, 11 Mar 2020 13:13:10 GMT",
"version": "v3"
}
] | 2020-03-18 | [
[
"Kalogeropoulos",
"Nikolaos",
""
]
] | We attempt to provide a mesoscopic treatment of the origin of black hole entropy in (3+1)-dimensional spacetimes. We ascribe this entropy to the non-trivial topology of the space-like sections $\Sigma$ of the horizon. This is not forbidden by topological censorship, since all the known energy inequalities needed to pro... |
1311.6841 | Florian Girelli | Ma\"it\'e Dupuis, Florian Girelli | Observables in Loop Quantum Gravity with a cosmological constant | 29 pages, 2 figures | Phys. Rev. D 90, 104037 (2014) | 10.1103/PhysRevD.90.104037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An open issue in loop quantum gravity (LQG) is the introduction of a
non-vanishing cosmological constant $\Lambda$. In 3d, Chern-Simons theory
provides some guiding lines: $\Lambda$ appears in the quantum deformation of
the gauge group. The Turaev-Viro model, which is an example of spin foam model
is also defined in ... | [
{
"created": "Tue, 26 Nov 2013 23:05:27 GMT",
"version": "v1"
}
] | 2014-12-03 | [
[
"Dupuis",
"Maïté",
""
],
[
"Girelli",
"Florian",
""
]
] | An open issue in loop quantum gravity (LQG) is the introduction of a non-vanishing cosmological constant $\Lambda$. In 3d, Chern-Simons theory provides some guiding lines: $\Lambda$ appears in the quantum deformation of the gauge group. The Turaev-Viro model, which is an example of spin foam model is also defined in te... |
1608.08359 | Aloke Sinha | Aloke Kumar Sinha | Thermal Fluctuations Of Stable Quantum ADS Kerr-Newman Black Hole | arXiv admin note: substantial text overlap with arXiv:1512.04181 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have already derived the Criteria for thermal stability of charged
rotating black holes in any dimension , for horizon areas that are large
relative to the Planck area (in these dimensions). The derivation is done by
using results of loop quantum gravity and equilibrium statistical mechanics of
the Grand Canonical... | [
{
"created": "Tue, 30 Aug 2016 08:18:40 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Sinha",
"Aloke Kumar",
""
]
] | We have already derived the Criteria for thermal stability of charged rotating black holes in any dimension , for horizon areas that are large relative to the Planck area (in these dimensions). The derivation is done by using results of loop quantum gravity and equilibrium statistical mechanics of the Grand Canonical e... |
1608.05963 | Jose Luis Jaramillo | Jos\'e Luis Jaramillo | A perspective on Black Hole Horizons from the Quantum Charged Particle | 6 pages, no figures, contribution to the proceedings volume of the
Spanish Relativity Meeting ERE2014: "Almost 100 years after Einstein
Revolution", Valencia, Spain, 1-5 September 2014 | J.Phys.Conf.Ser. 600 (2015) no.1, 012037 | 10.1088/1742-6596/600/1/012037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Black hole apparent horizons possess a natural notion of stability, whose
spectral characterization can be related to the problem of the stationary
quantum charged particle. Such mathematical relation leads to an "analyticity
conjecture" on the dependence of the spectral properties on a complex
"fine-structure-consta... | [
{
"created": "Sun, 21 Aug 2016 16:38:55 GMT",
"version": "v1"
}
] | 2016-08-23 | [
[
"Jaramillo",
"José Luis",
""
]
] | Black hole apparent horizons possess a natural notion of stability, whose spectral characterization can be related to the problem of the stationary quantum charged particle. Such mathematical relation leads to an "analyticity conjecture" on the dependence of the spectral properties on a complex "fine-structure-constant... |
2110.13508 | Kouji Nakamura | Kouji Nakamura | Gauge-invariant perturbation theory on the Schwarzschild background
spacetime Part I : -- Formulation and odd-mode perturbations | 61 pages, 4 figures, The Part I paper of the full paper version of
arXiv:2102.00830v3[gr-qc], minor revision (v8) | null | null | null | gr-qc astro-ph.HE hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is the Part I paper of our series of full papers on a gauge-invariant
{\it linear} perturbation theory on the Schwarzschild background spacetime
which was briefly reported in our short papers [K.~Nakamura, Class. Quantum
Grav. {\bf 38} (2021), 145010; K.~Nakamura, Letters in High Energy Physics {\bf
2021} (2021)... | [
{
"created": "Tue, 26 Oct 2021 09:04:39 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Oct 2021 07:07:47 GMT",
"version": "v2"
},
{
"created": "Fri, 17 Dec 2021 09:57:39 GMT",
"version": "v3"
},
{
"created": "Mon, 17 Jan 2022 06:07:59 GMT",
"version": "v4"
},
{
"c... | 2023-09-25 | [
[
"Nakamura",
"Kouji",
""
]
] | This is the Part I paper of our series of full papers on a gauge-invariant {\it linear} perturbation theory on the Schwarzschild background spacetime which was briefly reported in our short papers [K.~Nakamura, Class. Quantum Grav. {\bf 38} (2021), 145010; K.~Nakamura, Letters in High Energy Physics {\bf 2021} (2021), ... |
1503.02172 | Christian Heinicke | Christian Heinicke (1) and Friedrich W. Hehl (1 and 2). ((1) Inst.
Theor. Physics, Univ. of Cologne, Germany, (2) Dept. Physics & Astron., Univ.
of Missouri, Columbia, USA) | Schwarzschild and Kerr Solutions of Einstein's Field Equation -- an
introduction | 96 pages, 17 figures, pdflatex. Invited review article. To appear in
Wei-Tou Ni (editor) "One Hundred Years of General Relativity: Cosmology and
Gravity," World Scientific, Singapore (2015) | Int. J. Mod. Phys. D 24 (2015) 1530006 (78 pages) | 10.1142/S0218271815300062 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from Newton's gravitational theory, we give a general introduction
into the spherically symmetric solution of Einstein's vacuum field equation,
the Schwarzschild(-Droste) solution, and into one specific stationary axially
symmetric solution, the Kerr solution. The Schwarzschild solution is unique and
its met... | [
{
"created": "Sat, 7 Mar 2015 13:48:44 GMT",
"version": "v1"
}
] | 2015-03-10 | [
[
"Heinicke",
"Christian",
"",
"1 and 2"
],
[
"Hehl",
"Friedrich W.",
"",
"1 and 2"
],
[
".",
"",
""
]
] | Starting from Newton's gravitational theory, we give a general introduction into the spherically symmetric solution of Einstein's vacuum field equation, the Schwarzschild(-Droste) solution, and into one specific stationary axially symmetric solution, the Kerr solution. The Schwarzschild solution is unique and its metri... |
1604.06947 | Viktor G. Czinner | Viktor G. Czinner and Filipe C. Mena | Relative information entropy in cosmology: The problem of information
entanglement | 6 pages, 3 figures, to appear in Phys. Lett. B | Phys. Lett. B 758 (2016) 9-13 | 10.1016/j.physletb.2016.04.043 | null | gr-qc astro-ph.CO cond-mat.stat-mech | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The necessary information to distinguish a local inhomogeneous mass density
field from its spatial average on a compact domain of the universe can be
measured by relative information entropy. The Kullback-Leibler (KL) formula
arises very naturally in this context, however, it provides a very complicated
way to comput... | [
{
"created": "Sat, 23 Apr 2016 20:18:53 GMT",
"version": "v1"
}
] | 2016-04-28 | [
[
"Czinner",
"Viktor G.",
""
],
[
"Mena",
"Filipe C.",
""
]
] | The necessary information to distinguish a local inhomogeneous mass density field from its spatial average on a compact domain of the universe can be measured by relative information entropy. The Kullback-Leibler (KL) formula arises very naturally in this context, however, it provides a very complicated way to compute ... |
gr-qc/0101032 | Seth A. Major | Seth A. Major | New Operators for Spin Net Gravity: Definitions and Consequences | 7 pages, 2 figures, a talk at the MG9 Meeting, Rome, July 2-8, 2000 | null | 10.1142/9789812777386_0287 | null | gr-qc | null | Two operators for quantum gravity, angle and quasilocal energy, are briefly
reviewed. The requirements to model semi-classical angles are discussed. To
model semi-classical angles it is shown that the internal spins of the vertex
must be very large, ~10^20.
| [
{
"created": "Tue, 9 Jan 2001 18:31:01 GMT",
"version": "v1"
}
] | 2017-08-23 | [
[
"Major",
"Seth A.",
""
]
] | Two operators for quantum gravity, angle and quasilocal energy, are briefly reviewed. The requirements to model semi-classical angles are discussed. To model semi-classical angles it is shown that the internal spins of the vertex must be very large, ~10^20. |
gr-qc/0607031 | Lorenzo Iorio | Lorenzo Iorio | Constraining the relative inclinations of the planets B and C of the
millisecond pulsar PSR B1257+12 | LaTex2e, 10 pages, 1 table, 3 figures, 17 references. Small stylistic
changes. Version to appear in Journal of Astrophysics and Astronomy (JAA) | J.Astrophys.Astron.31:147-153,2010 | 10.1007/s12036-010-0015-8 | null | gr-qc astro-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate on the relative inclination of the planets B and C orbiting
the pulsar PSR B1257+12 in connection with potential violations of the
equivalence principle (Abridged).
| [
{
"created": "Fri, 7 Jul 2006 18:22:08 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Oct 2009 08:00:42 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Jul 2010 13:16:48 GMT",
"version": "v3"
},
{
"created": "Thu, 19 Aug 2010 14:25:02 GMT",
"version": "v4"
}
] | 2010-11-16 | [
[
"Iorio",
"Lorenzo",
""
]
] | We investigate on the relative inclination of the planets B and C orbiting the pulsar PSR B1257+12 in connection with potential violations of the equivalence principle (Abridged). |
1005.4990 | Mihai Visinescu | Bijan Saha, Mihai Visinescu | Bianchi type-VI model with cosmic strings in the presence of a magnetic
field | 13 pages, revised version, to appear in Rom. J. Phys | Rom. J. Phys. 55 (2010) 1064-1074 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Bianchi type-VI cosmological model in the presence of a magnetic flux
together with a cloud of cosmic strings is considered. In general, the presence
of a magnetic field imposes severe restrictions regarding the consistency of
the field equations. These difficulties could be overtaken working either in a
Bianchi ty... | [
{
"created": "Thu, 27 May 2010 06:03:06 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Jul 2010 10:46:54 GMT",
"version": "v2"
}
] | 2012-06-01 | [
[
"Saha",
"Bijan",
""
],
[
"Visinescu",
"Mihai",
""
]
] | A Bianchi type-VI cosmological model in the presence of a magnetic flux together with a cloud of cosmic strings is considered. In general, the presence of a magnetic field imposes severe restrictions regarding the consistency of the field equations. These difficulties could be overtaken working either in a Bianchi type... |
1801.08630 | Breno Giacchini | Breno L. Giacchini, Ilya L. Shapiro | Light bending in $F\left[g(\square)R\right]$ extended gravity theories | 17 pages, 1 figure | Phys. Lett. B 780, 54-60 (2018) | 10.1016/j.physletb.2018.02.055 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that in the weak field limit the light deflection alone cannot
distinguish between different $R + F[g(\square)R]$ models of gravity, where $F$
and $g$ are arbitrary functions. This does not imply, however, that in all
these theories an observer will see the same deflection angle. Owed to the need
to calibrate... | [
{
"created": "Thu, 25 Jan 2018 23:26:48 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Mar 2018 18:22:56 GMT",
"version": "v2"
}
] | 2018-03-09 | [
[
"Giacchini",
"Breno L.",
""
],
[
"Shapiro",
"Ilya L.",
""
]
] | We show that in the weak field limit the light deflection alone cannot distinguish between different $R + F[g(\square)R]$ models of gravity, where $F$ and $g$ are arbitrary functions. This does not imply, however, that in all these theories an observer will see the same deflection angle. Owed to the need to calibrate t... |
gr-qc/0411144 | Alexey Boyarsky | A. Boyarsky, A. Neronov, I. Tkachev | Quantum cosmology of the brane universe | 4 pages, revtex | Phys.Rev.Lett. 95 (2005) 091301 | 10.1103/PhysRevLett.95.091301 | null | gr-qc hep-th | null | We canonically quantize the dynamics of the brane universe embedded into the
five-dimensional Schwarzschild-anti-deSitter bulk space-time. We show that in
the brane-world settings the formulation of the quantum cosmology, including
the problem of initial conditions, is conceptually more simple than in the
3+1-dimensi... | [
{
"created": "Mon, 29 Nov 2004 20:42:44 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Boyarsky",
"A.",
""
],
[
"Neronov",
"A.",
""
],
[
"Tkachev",
"I.",
""
]
] | We canonically quantize the dynamics of the brane universe embedded into the five-dimensional Schwarzschild-anti-deSitter bulk space-time. We show that in the brane-world settings the formulation of the quantum cosmology, including the problem of initial conditions, is conceptually more simple than in the 3+1-dimension... |
1404.3765 | Andrei Lebed G | Andrei G. Lebed | Does the Equivalence between Gravitational Mass and Energy Survive for a
Composite Quantum Body? | 10 pages, no figures. arXiv admin note: substantial text overlap with
arXiv:1304.6106, arXiv:1311.2627, arXiv:1205.3134 | Advances in High Energy Physics, vol. 2014, Article ID 678087
(2014) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We define passive and active gravitational mass operators of the simplest
composite quantum body - a hydrogen atom. Although they do not commute with its
energy operator, the equivalence between the expectation values of passive and
active gravitational masses and energy is shown to survive for stationary
quantum sta... | [
{
"created": "Mon, 14 Apr 2014 22:00:17 GMT",
"version": "v1"
}
] | 2014-04-16 | [
[
"Lebed",
"Andrei G.",
""
]
] | We define passive and active gravitational mass operators of the simplest composite quantum body - a hydrogen atom. Although they do not commute with its energy operator, the equivalence between the expectation values of passive and active gravitational masses and energy is shown to survive for stationary quantum state... |
1001.1202 | Olivier Sarbach | Olivier Sarbach and Thomas Zannias | Nonlinear instability of wormholes supported by exotic dust and a
magnetic field | 5 pages, no figures. A small paragraph added in Sec. III. An appendix
added explaining the derivation of the main equations | Phys.Rev.D81:047502,2010 | 10.1103/PhysRevD.81.047502 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, spherically symmetric, static wormholes supported by exotic dust
and a radial magnetic field have been derived and argued to be stable with
respect to linear radial fluctuations. In this report we point out that these
wormholes are unstable due to the formation of shell-crossing singularities
when the nonli... | [
{
"created": "Fri, 8 Jan 2010 06:30:11 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Feb 2010 15:29:34 GMT",
"version": "v2"
}
] | 2010-04-06 | [
[
"Sarbach",
"Olivier",
""
],
[
"Zannias",
"Thomas",
""
]
] | Recently, spherically symmetric, static wormholes supported by exotic dust and a radial magnetic field have been derived and argued to be stable with respect to linear radial fluctuations. In this report we point out that these wormholes are unstable due to the formation of shell-crossing singularities when the nonline... |
0712.2555 | Ujjal Debnath | Subenoy Chakraborty and Ujjal Debnath | Shell Crossing Singularities in Quasi-Spherical Szekeres Models | 10 latex pages, RevTex style, no figures | Grav.Cosmol.14:184-189,2008 | 10.1134/S0202289308020102 | null | gr-qc | null | We investigate the occurrence of shell crossing singularities in
quasi-spherical Szekeres dust models with or without a cosmological constant.
We study the conditions for shell crossing singularity both from physical and
geometrical point of view and they are in agreement.
| [
{
"created": "Sun, 16 Dec 2007 02:45:15 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Chakraborty",
"Subenoy",
""
],
[
"Debnath",
"Ujjal",
""
]
] | We investigate the occurrence of shell crossing singularities in quasi-spherical Szekeres dust models with or without a cosmological constant. We study the conditions for shell crossing singularity both from physical and geometrical point of view and they are in agreement. |
1903.09020 | Ahmad Sheykhi | H. Yazdikarimi, A. Sheykhi and Z. Dayyani | Critical behavior of Gauss-Bonnet black holes via an alternative phase
space | 15 pages | Phys. Rev. D 99, 124017 (2019) | 10.1103/PhysRevD.99.124017 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Recently, it was argued that charged Anti-de Sitter (AdS) black holes admit
critical behavior, without extending phase space, similar to the Van der Waals
fluid system in the $Q^2-\Psi$ plans where $\Psi=1/v$ (the conjugate of $Q^2$)
is the inverse of the specific volume \cite{Dehy}. In this picture, the square
of th... | [
{
"created": "Wed, 20 Mar 2019 15:44:55 GMT",
"version": "v1"
}
] | 2019-06-19 | [
[
"Yazdikarimi",
"H.",
""
],
[
"Sheykhi",
"A.",
""
],
[
"Dayyani",
"Z.",
""
]
] | Recently, it was argued that charged Anti-de Sitter (AdS) black holes admit critical behavior, without extending phase space, similar to the Van der Waals fluid system in the $Q^2-\Psi$ plans where $\Psi=1/v$ (the conjugate of $Q^2$) is the inverse of the specific volume \cite{Dehy}. In this picture, the square of the ... |
1112.3222 | Edward Porter | J\'er\^ome Carr\'e and Edward K. Porter | Calculating the continued fraction coefficients of a sub-diagonal Pad\'e
approximant at arbitrary order | 7 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The inspiral of two compact objects in gravitational wave astronomy is
described by a post-Newtonian expansion in powers of $(v/c)$. In most cases, it
is believed that the post-Newtonian expansion is asymptotically divergent. A
standard technique for accelerating the convergence of a power series is to
re-sum the ser... | [
{
"created": "Wed, 14 Dec 2011 14:08:34 GMT",
"version": "v1"
}
] | 2011-12-15 | [
[
"Carré",
"Jérôme",
""
],
[
"Porter",
"Edward K.",
""
]
] | The inspiral of two compact objects in gravitational wave astronomy is described by a post-Newtonian expansion in powers of $(v/c)$. In most cases, it is believed that the post-Newtonian expansion is asymptotically divergent. A standard technique for accelerating the convergence of a power series is to re-sum the serie... |
1309.0352 | Jaume Haro | Jaime Haro | Cosmological perturbations in teleparallel Loop Quantum Cosmology | version accepted for publication in JCAP | JCAP(11)068 (2013) | 10.1088/1475-7516/2013/11/068 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Cosmological perturbations in Loop Quantum Cosmology (LQC) are usually
studied incorporating either holonomy corrections, where the Ashtekar
connection is replaced by a suitable sinus function in order to have a
well-defined quantum analogue, or inverse-volume corrections coming from the
eigenvalues of the inverse-vo... | [
{
"created": "Mon, 2 Sep 2013 10:13:57 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Sep 2013 10:28:13 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Nov 2013 10:03:31 GMT",
"version": "v3"
}
] | 2015-06-17 | [
[
"Haro",
"Jaime",
""
]
] | Cosmological perturbations in Loop Quantum Cosmology (LQC) are usually studied incorporating either holonomy corrections, where the Ashtekar connection is replaced by a suitable sinus function in order to have a well-defined quantum analogue, or inverse-volume corrections coming from the eigenvalues of the inverse-volu... |
1901.00388 | Andrzej Woszczyna | Zdzislaw A. Golda, Andrzej Woszczyna, Lukasz Bratek | First integrals in the Brans-Dicke cosmology | 8 pages, 3 figures, 2 tables | null | null | null | gr-qc nlin.SI | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The work presents the frst and the second degree Darboux polynomials,
Jacobi's last multipliers as well as the set of frst integrals for Brans-Dicke
cosmology. Algebraic invariant sets are constructed. First integrals are
visualized for some particular values of the $\omega$ parameter.
| [
{
"created": "Mon, 31 Dec 2018 18:41:34 GMT",
"version": "v1"
}
] | 2019-01-03 | [
[
"Golda",
"Zdzislaw A.",
""
],
[
"Woszczyna",
"Andrzej",
""
],
[
"Bratek",
"Lukasz",
""
]
] | The work presents the frst and the second degree Darboux polynomials, Jacobi's last multipliers as well as the set of frst integrals for Brans-Dicke cosmology. Algebraic invariant sets are constructed. First integrals are visualized for some particular values of the $\omega$ parameter. |
1504.01302 | Tapobrata Sarkar | Akash Goel, Reevu Maity, Pratim Roy, Tapobrata Sarkar | Tidal Forces in Naked Singularity Backgrounds | 1 + 18 Pages, 9 figures | null | 10.1103/PhysRevD.91.104029 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The end stage of a gravitational collapse process can generically result in a
black hole or a naked singularity. Here we undertake a comparative analysis of
the nature of tidal forces in these backgrounds. The effect of such forces is
generically exemplified by the Roche limit, which predicts the distance within
whic... | [
{
"created": "Mon, 6 Apr 2015 15:15:07 GMT",
"version": "v1"
}
] | 2015-06-11 | [
[
"Goel",
"Akash",
""
],
[
"Maity",
"Reevu",
""
],
[
"Roy",
"Pratim",
""
],
[
"Sarkar",
"Tapobrata",
""
]
] | The end stage of a gravitational collapse process can generically result in a black hole or a naked singularity. Here we undertake a comparative analysis of the nature of tidal forces in these backgrounds. The effect of such forces is generically exemplified by the Roche limit, which predicts the distance within which ... |
gr-qc/0401036 | Sung Won Kim | Sung-Won Kim | Rotating wormhole and scalar perturbation | 6 pages, 4 figures, Revtex4 | Nuovo Cim.B120:1235-1242,2005 | 10.1393/ncb/i2005-10151-y | null | gr-qc | null | In this paper, we study the rotational wormhole and scalar perturbation under
the spacetime. We found the Schr\"odinger like equation and consider the
asymptotic solutions for the special cases.
| [
{
"created": "Sat, 10 Jan 2004 07:01:41 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Kim",
"Sung-Won",
""
]
] | In this paper, we study the rotational wormhole and scalar perturbation under the spacetime. We found the Schr\"odinger like equation and consider the asymptotic solutions for the special cases. |
gr-qc/0211019 | Sushant G. Ghosh | S. G. Ghosh (Science College, Nagpur) and Naresh Dadhich (IUCAA, Pune) | Gravitational collapse of null strange quark fluid and cosmic censorship | 8 pages, RevTeX 4, no figures, Accepted in GRG | Gen.Rel.Grav. 35 (2003) 359-370 | 10.1023/A:1022361631003 | null | gr-qc | null | We study gravitational collapse of the general spherically symmetric null
strange quark fluid having the equation of state, $p = (\rho - 4B)/n$, where
$B$ is the bag constant. An interesting feature that emerges is that the
initial data set giving rise to naked singularity in the Vaidya collapse of
null fluid gets co... | [
{
"created": "Wed, 6 Nov 2002 10:55:01 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Ghosh",
"S. G.",
"",
"Science College, Nagpur"
],
[
"Dadhich",
"Naresh",
"",
"IUCAA, Pune"
]
] | We study gravitational collapse of the general spherically symmetric null strange quark fluid having the equation of state, $p = (\rho - 4B)/n$, where $B$ is the bag constant. An interesting feature that emerges is that the initial data set giving rise to naked singularity in the Vaidya collapse of null fluid gets cove... |
1502.03236 | Prado Martin-Moruno | Prado Martin-Moruno, Nelson J. Nunes, and Francisco S. N. Lobo | Horndeski theories self-tuning to a de Sitter vacuum | V1: 5 pages. V2: 8 pages; 5 references added; 2 new appendixes;
clarifications in the discussion; no physics changes. This version accepted
for publication in Physical Review D | Phys.Rev.D91:084029,2015 | 10.1103/PhysRevD.91.084029 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider Horndeski cosmological models able to screen the vacuum energy
coming from any field theory assuming that after this screening the space
should be in a de Sitter vacuum with a particular value of the cosmological
constant specified by the theory of gravity itself. The most general
scalar-tensor cosmologic... | [
{
"created": "Wed, 11 Feb 2015 09:54:46 GMT",
"version": "v1"
},
{
"created": "Fri, 27 Mar 2015 17:58:57 GMT",
"version": "v2"
}
] | 2015-04-15 | [
[
"Martin-Moruno",
"Prado",
""
],
[
"Nunes",
"Nelson J.",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | We consider Horndeski cosmological models able to screen the vacuum energy coming from any field theory assuming that after this screening the space should be in a de Sitter vacuum with a particular value of the cosmological constant specified by the theory of gravity itself. The most general scalar-tensor cosmological... |
2201.01015 | Oem Trivedi | Oem Trivedi, Maxim Khlopov | On finite time singularities in scalar field dark energy models based in
the RS-II Braneworld | v2, 17 pages with no figures, matches the published version in EPJC | Eur. Phys. J. C 82, 800 (2022) | 10.1140/epjc/s10052-022-10767-2 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | The quest of deciphering the true nature of dark energy has proven to be one
of the most exciting in recent times in cosmology. Various ideas have been put
forward in this regard besides the usual cosmological constant approach,
ranging from scalar field based models like Quintessence and Phantom dark
energy to vario... | [
{
"created": "Tue, 4 Jan 2022 07:22:32 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Sep 2022 16:54:47 GMT",
"version": "v2"
}
] | 2022-09-08 | [
[
"Trivedi",
"Oem",
""
],
[
"Khlopov",
"Maxim",
""
]
] | The quest of deciphering the true nature of dark energy has proven to be one of the most exciting in recent times in cosmology. Various ideas have been put forward in this regard besides the usual cosmological constant approach, ranging from scalar field based models like Quintessence and Phantom dark energy to various... |
gr-qc/9801016 | Mark Trodden | Andrew A. de Laix, Mark Trodden and Tanmay Vachaspati (Case Western
Reserve University) | Topological Inflation with Multiple Winding | 13 pages, 4 figures, RevTeX | Phys. Rev. D 57, 7186 (1998) | 10.1103/PhysRevD.57.7186 | CWRU-P23-97 | gr-qc astro-ph hep-ph | null | We analyze the core dynamics of critically coupled, superheavy gauge vortices
in the (2+1) dimensional Einstein-Abelian-Higgs system. By numerically solving
the Eistein and field equations for various values of the symmetry breaking
scale, we identify the regime in which static solutions cease to exist and
topologica... | [
{
"created": "Wed, 7 Jan 1998 20:58:04 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Mar 1998 17:01:12 GMT",
"version": "v2"
}
] | 2016-08-25 | [
[
"de Laix",
"Andrew A.",
"",
"Case Western\n Reserve University"
],
[
"Trodden",
"Mark",
"",
"Case Western\n Reserve University"
],
[
"Vachaspati",
"Tanmay",
"",
"Case Western\n Reserve University"
]
] | We analyze the core dynamics of critically coupled, superheavy gauge vortices in the (2+1) dimensional Einstein-Abelian-Higgs system. By numerically solving the Eistein and field equations for various values of the symmetry breaking scale, we identify the regime in which static solutions cease to exist and topological ... |
1909.08039 | Pedro V. P. Cunha | Pedro V.P. Cunha, Carlos A. R. Herdeiro, Eugen Radu | EHT constraint on the ultralight scalar hair of the M87 supermassive
black hole | 16 pages, 4 figures; v2: small modifications accounting for the
referee's feedback; references added | Universe 2019, 5(12), 220 | 10.3390/universe5120220 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Hypothetical ultralight bosonic fields will spontaneously form macroscopic
bosonic halos around Kerr black holes, via superradiance, transferring part of
the mass and angular momentum of the black hole into the halo. Such process,
however, is only efficient if resonant: when the Compton wavelength of the
field approx... | [
{
"created": "Tue, 17 Sep 2019 19:14:36 GMT",
"version": "v1"
},
{
"created": "Tue, 7 Jan 2020 11:55:05 GMT",
"version": "v2"
}
] | 2020-01-08 | [
[
"Cunha",
"Pedro V. P.",
""
],
[
"Herdeiro",
"Carlos A. R.",
""
],
[
"Radu",
"Eugen",
""
]
] | Hypothetical ultralight bosonic fields will spontaneously form macroscopic bosonic halos around Kerr black holes, via superradiance, transferring part of the mass and angular momentum of the black hole into the halo. Such process, however, is only efficient if resonant: when the Compton wavelength of the field approxim... |
1508.00971 | Muhammad Raza | Muhammad Raza, Kairat Myrzakulov, Davood Momeni, and Ratbay Myrzakulov | Mimetic Attractors | null | Int.J.Theor.Phys. 55 (2016) no.5, 2558-2572 | 10.1007/s10773-015-2891-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we investigate the mathematical modeling for the cosmological
attractors propagated in mimetic gravity upon which an interacting dark
energy-dark matter is supposed to be existed. The average value of the
interaction of these percentages, namely $\Gamma_i$ say, may be used to
investigate generally the ... | [
{
"created": "Wed, 5 Aug 2015 04:33:04 GMT",
"version": "v1"
}
] | 2017-10-17 | [
[
"Raza",
"Muhammad",
""
],
[
"Myrzakulov",
"Kairat",
""
],
[
"Momeni",
"Davood",
""
],
[
"Myrzakulov",
"Ratbay",
""
]
] | In this paper, we investigate the mathematical modeling for the cosmological attractors propagated in mimetic gravity upon which an interacting dark energy-dark matter is supposed to be existed. The average value of the interaction of these percentages, namely $\Gamma_i$ say, may be used to investigate generally the mo... |
2302.08289 | Tiberiu Harko | Piyabut Burikham, Tiberiu Harko, Kulapant Pimsamarn, Shahab Shahidi | Dark matter as a Weyl geometric effect | 20 pages, 2 figures, accepted for publication in PRD | null | 10.1103/PhysRevD.107.064008 | null | gr-qc astro-ph.GA hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the possibility that the observed behavior of test particles
outside galaxies, which is usually explained by assuming the existence of dark
matter, is the result of the dynamical evolution of particles in a Weyl type
geometry, and its associated conformally invariant Weyl geometric quadratic
gravity. A... | [
{
"created": "Thu, 16 Feb 2023 13:38:25 GMT",
"version": "v1"
}
] | 2023-03-29 | [
[
"Burikham",
"Piyabut",
""
],
[
"Harko",
"Tiberiu",
""
],
[
"Pimsamarn",
"Kulapant",
""
],
[
"Shahidi",
"Shahab",
""
]
] | We investigate the possibility that the observed behavior of test particles outside galaxies, which is usually explained by assuming the existence of dark matter, is the result of the dynamical evolution of particles in a Weyl type geometry, and its associated conformally invariant Weyl geometric quadratic gravity. As ... |
gr-qc/9307032 | Bev Berger | B.K. Berger, V. Moncrief | Numerical Investigation of Cosmological Singularities | 37 pp +14 figures (not included, available on request), plain TeX | Phys.Rev. D48 (1993) 4676-4687 | 10.1103/PhysRevD.48.4676 | null | gr-qc | null | Although cosmological solutions to Einstein's equations are known to be
generically singular, little is known about the nature of singularities in
typical spacetimes. It is shown here how the operator splitting used in a
particular symplectic numerical integration scheme fits naturally into the
Einstein equations for... | [
{
"created": "Thu, 22 Jul 1993 21:06:02 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Berger",
"B. K.",
""
],
[
"Moncrief",
"V.",
""
]
] | Although cosmological solutions to Einstein's equations are known to be generically singular, little is known about the nature of singularities in typical spacetimes. It is shown here how the operator splitting used in a particular symplectic numerical integration scheme fits naturally into the Einstein equations for a... |
1404.4586 | Yury F. Pirogov | Yu. F. Pirogov | Emergent gravity, violated relativity and dark matter | 10 pages, minor improvements | Journal of Modern Physics, 5, 1418-1426 (2014) | 10.4236/jmp.2014.515143 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The nonlinear affine Goldstone model of the emergent gravity, built on the
nonlinearly realized/hidden affine symmetry, is concisely revisited. Beyond
General Relativity, the explicit violation of general invariance/relativity,
under preserving general covariance, is exposed. Dependent on a nondynamical
affine connec... | [
{
"created": "Thu, 17 Apr 2014 17:15:50 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Apr 2014 14:42:00 GMT",
"version": "v2"
}
] | 2015-06-19 | [
[
"Pirogov",
"Yu. F.",
""
]
] | The nonlinear affine Goldstone model of the emergent gravity, built on the nonlinearly realized/hidden affine symmetry, is concisely revisited. Beyond General Relativity, the explicit violation of general invariance/relativity, under preserving general covariance, is exposed. Dependent on a nondynamical affine connecti... |
1106.4932 | Michael Bradley | Michael Bradley, Peter K. S. Dunsby, Mats Forsberg and Zolt\'an
Keresztes | Density growth in Kantowski-Sachs cosmologies with cosmological constant | 33 pages, 17 pictures | Class. Quantum Grav. 29 (2012) 095023 | 10.1088/0264-9381/29/9/095023 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work the growth of density perturbations in Kantowski-Sachs
cosmologies with a positive cosmological constant is studied, using the 1+3 and
1+1+2 covariant formalisms. For each wave number we obtain a closed system for
scalars formed from quantities that are zero on the background and hence are
gauge-invarian... | [
{
"created": "Fri, 24 Jun 2011 10:13:18 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Jul 2011 14:40:39 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Jan 2012 19:58:06 GMT",
"version": "v3"
},
{
"created": "Mon, 30 Apr 2012 15:14:43 GMT",
"version": "v4"
}
] | 2012-05-01 | [
[
"Bradley",
"Michael",
""
],
[
"Dunsby",
"Peter K. S.",
""
],
[
"Forsberg",
"Mats",
""
],
[
"Keresztes",
"Zoltán",
""
]
] | In this work the growth of density perturbations in Kantowski-Sachs cosmologies with a positive cosmological constant is studied, using the 1+3 and 1+1+2 covariant formalisms. For each wave number we obtain a closed system for scalars formed from quantities that are zero on the background and hence are gauge-invariant.... |
0709.0942 | David Garfinkle | David Garfinkle and Greg Comer | Matters of Gravity, The Newsletter of the Topical Group in Gravitation
of the American Physical Society, Volume 30, Fall 2007 | 37 pages, latex, 3 figures | null | null | null | gr-qc | null | GGR News:
-we hear that..., by David Garfinkle
-News from the GRG Society, by Abhay Ashtekar
-LIGO/GEO/Virgo work together, by Peter Saulson
-GWIC Ten Years on, by Stan Whitcomb
Research Briefs:
-Quasi-local energy, by Bjoern S. Schmekel
-The current status of cosmic strings, by Patrick Peter
-Gravita... | [
{
"created": "Thu, 6 Sep 2007 19:17:52 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Sep 2007 22:33:04 GMT",
"version": "v2"
}
] | 2007-10-10 | [
[
"Garfinkle",
"David",
""
],
[
"Comer",
"Greg",
""
]
] | GGR News: -we hear that..., by David Garfinkle -News from the GRG Society, by Abhay Ashtekar -LIGO/GEO/Virgo work together, by Peter Saulson -GWIC Ten Years on, by Stan Whitcomb Research Briefs: -Quasi-local energy, by Bjoern S. Schmekel -The current status of cosmic strings, by Patrick Peter -Gravitational waves from ... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.