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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1012.1409 | Kouji Nakamura | Kouji Nakamura | Construction of gauge-invariant variables for linear-order metric
perturbations on some background spacetimes | 4 pages, no figure, Prepared for the proceedings of 20th Workshop On
General Relativity and Gravitation (Sept. 21 - Sept. 25, (2010), YITP Kyoto
University, Japan) | null | null | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gauge-invariant treatments of general-relativistic higher-order perturbations
on generic background spacetime is proposed. We show the fact that the
linear-order metric perturbation is decomposed into gauge-invariant and
gauge-variant parts, which was the important premise of this general framework.
This means that t... | [
{
"created": "Tue, 7 Dec 2010 06:29:40 GMT",
"version": "v1"
}
] | 2015-03-17 | [
[
"Nakamura",
"Kouji",
""
]
] | Gauge-invariant treatments of general-relativistic higher-order perturbations on generic background spacetime is proposed. We show the fact that the linear-order metric perturbation is decomposed into gauge-invariant and gauge-variant parts, which was the important premise of this general framework. This means that the... |
1710.10588 | David Benisty | David Benisty and Eduardo I. Guendelman | A transition between bouncing hyper-inflation to {\Lambda}CDM from
diffusive scalar fields | Updated version, before acceptance for publication | null | 10.1142/S0217751X18501191 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the history of the universe from a possible big bang or a bounce
into a late period of a unified interacting dark energy - dark matter model.
The model is based on the Two Measures Theories (T.M.T.) which introduces a
metric independent volume element and this allows us to construct a unification
of dark ... | [
{
"created": "Sun, 29 Oct 2017 10:03:17 GMT",
"version": "v1"
},
{
"created": "Tue, 22 May 2018 14:54:30 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Jul 2018 17:13:36 GMT",
"version": "v3"
}
] | 2018-07-30 | [
[
"Benisty",
"David",
""
],
[
"Guendelman",
"Eduardo I.",
""
]
] | We consider the history of the universe from a possible big bang or a bounce into a late period of a unified interacting dark energy - dark matter model. The model is based on the Two Measures Theories (T.M.T.) which introduces a metric independent volume element and this allows us to construct a unification of dark en... |
1403.4393 | Orfeu Bertolami | Orfeu Bertolami, Riccardo March and Jorge P\'aramos | A perturbative approach for the study of compatibility between
nonminimally coupled gravity and Solar System experiments | 4 pages. Talk delivered by one of us (RM) at the International
Conference on Mathematical Modeling in Physical Sciences, Prague, Czech
Republic, 1-5 September, 2013 | null | 10.1088/1742-6596/490/1/012239 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a framework for constraining a certain class of theories of
nonminimally coupled (NMC) gravity with Solar System observations.
| [
{
"created": "Tue, 18 Mar 2014 10:19:50 GMT",
"version": "v1"
}
] | 2015-06-19 | [
[
"Bertolami",
"Orfeu",
""
],
[
"March",
"Riccardo",
""
],
[
"Páramos",
"Jorge",
""
]
] | We develop a framework for constraining a certain class of theories of nonminimally coupled (NMC) gravity with Solar System observations. |
gr-qc/9906089 | Brendan S. Guilfoyle | Brendan S. Guilfoyle | Interior Weyl-type Solutions of the Einstein-Maxwell Field Equations | 21 pages, RevTex, to appear in General Relativity and Gravitation | Gen.Rel.Grav. 31 (1999) 1645-1673 | 10.1023/A:1026706031676 | null | gr-qc | null | Static solutions of the electro-gravitational field equations exhibiting a
functional relationship between the electric and gravitational potentials are
studied. General results for these metrics are presented which extend previous
work of Majumdar. In particular, it is shown that for any solution of the field
equati... | [
{
"created": "Tue, 22 Jun 1999 10:08:46 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Guilfoyle",
"Brendan S.",
""
]
] | Static solutions of the electro-gravitational field equations exhibiting a functional relationship between the electric and gravitational potentials are studied. General results for these metrics are presented which extend previous work of Majumdar. In particular, it is shown that for any solution of the field equation... |
1210.5182 | Silke Weinfurtner | Silke Weinfurtner, Gemma De las Cuevas, Miguel Angel Martin-Delgado
and Hans J. Briegel | Reducing Spacetime to Binary Information | 5 pages main text, 6 pages supplementary information, 7 figures | Journal of Physics A: Mathematical and Theoretical, Volume 47,
Number 9, Published 17 February 2014 | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a new description of discrete space-time in 1+1 dimensions in
terms of a set of elementary geometrical units that represent its independent
classical degrees of freedom. This is achieved by means of a binary encoding
that is ergodic in the class of space-time manifolds respecting coordinate
invariance of g... | [
{
"created": "Thu, 18 Oct 2012 16:44:24 GMT",
"version": "v1"
}
] | 2018-01-30 | [
[
"Weinfurtner",
"Silke",
""
],
[
"Cuevas",
"Gemma De las",
""
],
[
"Martin-Delgado",
"Miguel Angel",
""
],
[
"Briegel",
"Hans J.",
""
]
] | We present a new description of discrete space-time in 1+1 dimensions in terms of a set of elementary geometrical units that represent its independent classical degrees of freedom. This is achieved by means of a binary encoding that is ergodic in the class of space-time manifolds respecting coordinate invariance of gen... |
1004.4620 | Paul R. Anderson | Jason D. Bates, Paul R. Anderson | Effects of Quantized Scalar Fields in Cosmological Spacetimes with Big
Rip Singularities | PRD version. References added. Several minor corrections and changes.
22 pages, 3 figures | Phys.Rev.D82:024018,2010 | 10.1103/PhysRevD.82.024018 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Effects of quantized free scalar fields in cosmological spacetimes with Big
Rip singularities are investigated. The energy densities for these fields are
computed at late times when the expansion is very rapid. For the massless
minimally coupled field it is shown that an attractor state exists in the sense
that, for ... | [
{
"created": "Mon, 26 Apr 2010 19:47:53 GMT",
"version": "v1"
},
{
"created": "Tue, 11 May 2010 18:16:07 GMT",
"version": "v2"
},
{
"created": "Fri, 22 Apr 2011 20:39:33 GMT",
"version": "v3"
}
] | 2011-04-26 | [
[
"Bates",
"Jason D.",
""
],
[
"Anderson",
"Paul R.",
""
]
] | Effects of quantized free scalar fields in cosmological spacetimes with Big Rip singularities are investigated. The energy densities for these fields are computed at late times when the expansion is very rapid. For the massless minimally coupled field it is shown that an attractor state exists in the sense that, for a ... |
2206.12083 | Soumya Mohanty | Xue-Hao Zhang, Shao-Dong Zhao, Soumya D. Mohanty, Yu-Xiao Liu | Resolving Galactic binaries using a network of space-borne gravitational
wave detectors | 13 pages, 5 figures | null | 10.1103/PhysRevD.106.102004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extracting gravitational wave (GW) signals from individual Galactic binaries
(GBs) against their self-generated confusion noise is a key data analysis
challenge for space-borne detectors operating in the $\approx 0.1$ mHz to
$\approx 10$ mHz range. Given the likely prospect that there will be multiple
such detectors,... | [
{
"created": "Fri, 24 Jun 2022 05:23:01 GMT",
"version": "v1"
}
] | 2022-11-30 | [
[
"Zhang",
"Xue-Hao",
""
],
[
"Zhao",
"Shao-Dong",
""
],
[
"Mohanty",
"Soumya D.",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | Extracting gravitational wave (GW) signals from individual Galactic binaries (GBs) against their self-generated confusion noise is a key data analysis challenge for space-borne detectors operating in the $\approx 0.1$ mHz to $\approx 10$ mHz range. Given the likely prospect that there will be multiple such detectors, n... |
1505.06996 | Lorenzo Iorio | Lorenzo Iorio, Ninfa Radicella, Matteo Luca Ruggiero | Constraining f(T) gravity in the Solar System | LaTex2e, 16 pages, 2 figures, no tables. Accepted for publication in
Journal of Cosmology and Astroparticle Physics (JCAP). arXiv admin note: text
overlap with arXiv:1501.02198 | JCAP08(2015)021 | 10.1088/1475-7516/2015/08/021 | null | gr-qc astro-ph.EP physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of $f(T)$ theories of gravity, we solve the field equations
for $f(T)=T+\alpha T^{n}$, in the weak-field approximation and for spherical
symmetry spacetime. Since $f(T)=T$ corresponds to Teleparallel Gravity, which
is equivalent to General Relativity, the non linearity of the Lagrangian are
expected ... | [
{
"created": "Sun, 24 May 2015 15:28:42 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Jul 2015 08:05:46 GMT",
"version": "v2"
}
] | 2015-08-13 | [
[
"Iorio",
"Lorenzo",
""
],
[
"Radicella",
"Ninfa",
""
],
[
"Ruggiero",
"Matteo Luca",
""
]
] | In the framework of $f(T)$ theories of gravity, we solve the field equations for $f(T)=T+\alpha T^{n}$, in the weak-field approximation and for spherical symmetry spacetime. Since $f(T)=T$ corresponds to Teleparallel Gravity, which is equivalent to General Relativity, the non linearity of the Lagrangian are expected to... |
0808.3482 | Chen Songbai | Songbai Chen, Bin Wang, Jiliang Jing | Dynamics of interacting dark energy model in Einstein and Loop Quantum
Cosmology | 16 pages, 4 figures, references added, accepted by Phys. Rev. D | Phys.Rev.D78:123503,2008 | 10.1103/PhysRevD.78.123503 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the background dynamics when dark energy is coupled to dark
matter in the universe described by Einstein cosmology and Loop Quantum
Cosmology. We introduce a new general form of dark sector coupling, which
presents us a more complicated dynamical phase space. Differences in the phase
space in obtaining... | [
{
"created": "Tue, 26 Aug 2008 10:40:44 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Nov 2008 01:57:01 GMT",
"version": "v2"
}
] | 2008-12-18 | [
[
"Chen",
"Songbai",
""
],
[
"Wang",
"Bin",
""
],
[
"Jing",
"Jiliang",
""
]
] | We investigate the background dynamics when dark energy is coupled to dark matter in the universe described by Einstein cosmology and Loop Quantum Cosmology. We introduce a new general form of dark sector coupling, which presents us a more complicated dynamical phase space. Differences in the phase space in obtaining t... |
2008.09115 | Mubasher Jamil | Kimet Jusufi, Mustapha Azreg-A\"inou, Mubasher Jamil, Tao Zhu | Constraining the Generalized Uncertainty Principle Through Black Hole
Shadow and Quasiperiodic Oscillations | 14 pages, 10 captioned figures, 4 tables | IJGMMP Volume No. 19, Issue No. 05, Article No. 2250068, Year 2022 | 10.1142/S0219887822500682 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the effect of the Generalized Uncertainty Principle
(GUP) on the shadow of GUP-modified Kerr black hole and the correspondence
between the shadow radius and the real part of the quasinormal modes (QNMs). We
find that the shadow curvature radius of the GUP-modfied Kerr black hole is
bigger compa... | [
{
"created": "Thu, 20 Aug 2020 12:01:48 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Mar 2021 04:42:03 GMT",
"version": "v2"
}
] | 2022-04-11 | [
[
"Jusufi",
"Kimet",
""
],
[
"Azreg-Aïnou",
"Mustapha",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Zhu",
"Tao",
""
]
] | In this paper we study the effect of the Generalized Uncertainty Principle (GUP) on the shadow of GUP-modified Kerr black hole and the correspondence between the shadow radius and the real part of the quasinormal modes (QNMs). We find that the shadow curvature radius of the GUP-modfied Kerr black hole is bigger compare... |
2406.11582 | Adailton Ara\'ujo Filho | A. A. Ara\'ujo Filho | Antisymmetric tensor influence on charged black hole lensing phenomena
and time delay | 24 pages and 6 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we investigate the gravitational lensing of a charged black
hole (spherically symmetric) within the context of Lorentz violation triggered
by an antisymmetric tensor field. Our calculations consider two different
scenarios: the weak and strong deflection limits. For the weak deflection
limit, we employ ... | [
{
"created": "Mon, 17 Jun 2024 14:24:40 GMT",
"version": "v1"
}
] | 2024-06-18 | [
[
"Filho",
"A. A. Araújo",
""
]
] | In this work, we investigate the gravitational lensing of a charged black hole (spherically symmetric) within the context of Lorentz violation triggered by an antisymmetric tensor field. Our calculations consider two different scenarios: the weak and strong deflection limits. For the weak deflection limit, we employ th... |
1908.07160 | Tousif Islam | Tousif Islam and Koushik Dutta | Modified Gravity Theories in Light of the Anomalous Velocity Dispersion
of NGC1052-DF2 | 7 pages, 6 figures; matches the published version | Phys. Rev. D 100, 104049 (2019) | 10.1103/PhysRevD.100.104049 | null | gr-qc astro-ph.CO astro-ph.GA | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent observations of ultra-dwarf galaxy NGC1052-DF2 started an interesting
discussion between dark matter hypothesis and modified gravity theories.
Reported low velocity dispersion (< 10.5 km/s at 90% confidence level) derived
from the kinematic data of 10 globular clusters in the galaxy points towards an
extraordi... | [
{
"created": "Tue, 20 Aug 2019 04:24:38 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Dec 2019 06:50:42 GMT",
"version": "v2"
}
] | 2019-12-10 | [
[
"Islam",
"Tousif",
""
],
[
"Dutta",
"Koushik",
""
]
] | Recent observations of ultra-dwarf galaxy NGC1052-DF2 started an interesting discussion between dark matter hypothesis and modified gravity theories. Reported low velocity dispersion (< 10.5 km/s at 90% confidence level) derived from the kinematic data of 10 globular clusters in the galaxy points towards an extraordina... |
1307.0753 | Lorenzo Iorio | Lorenzo Iorio, Matteo Luca Ruggiero, Christian Corda | Novel considerations about the error budget of the LAGEOS-based tests of
frame-dragging with GRACE geopotential models | LaTex2e, 18 pages, 2 tables, no figures. Version matching the
published one | Acta Astronaut.91:141-148,2013 | 10.1016/j.actaastro.2013.06.002 | null | gr-qc astro-ph.EP physics.geo-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A realistic assessment of the uncertainties in the even zonals of a given
geopotential model must be made by directly comparing its coefficients with
those of a wholly independent solution of superior formal accuracy. Otherwise,
a favorable selective bias is introduced in the evaluation of the total error
budget of t... | [
{
"created": "Sun, 30 Jun 2013 21:25:35 GMT",
"version": "v1"
}
] | 2013-07-03 | [
[
"Iorio",
"Lorenzo",
""
],
[
"Ruggiero",
"Matteo Luca",
""
],
[
"Corda",
"Christian",
""
]
] | A realistic assessment of the uncertainties in the even zonals of a given geopotential model must be made by directly comparing its coefficients with those of a wholly independent solution of superior formal accuracy. Otherwise, a favorable selective bias is introduced in the evaluation of the total error budget of the... |
1911.04937 | Ernesto Nungesser | Ho Lee, Ernesto Nungesser, Paul Tod | On the future of solutions to the massless Einstein-Vlasov system in a
Bianchi I cosmology | 11 pages. In this version V2 errata corrected (in particular decay
rates of anisotropy) and references added | Gen Relativ Gravit 52, 48 (2020) | 10.1007/s10714-020-02699-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that massless solutions to the Einstein-Vlasov system in a Bianchi I
space-time with small anisotropy, i.e. small shear and small trace-free part of
the spatial energy momentum tensor, tend to a radiation fluid in an Einstein-de
Sitter space-time with the anisotropy $\Sigma^a_b\Sigma^b_a$ and $\tilde{w}^i_j
\... | [
{
"created": "Tue, 12 Nov 2019 15:40:00 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Feb 2020 10:10:56 GMT",
"version": "v2"
}
] | 2024-06-18 | [
[
"Lee",
"Ho",
""
],
[
"Nungesser",
"Ernesto",
""
],
[
"Tod",
"Paul",
""
]
] | We show that massless solutions to the Einstein-Vlasov system in a Bianchi I space-time with small anisotropy, i.e. small shear and small trace-free part of the spatial energy momentum tensor, tend to a radiation fluid in an Einstein-de Sitter space-time with the anisotropy $\Sigma^a_b\Sigma^b_a$ and $\tilde{w}^i_j \ti... |
1709.07087 | Fran\c{c}ois Rondeau | Fran\c{c}ois Rondeau and Baojiu Li | Equivalence of cosmological observables in conformally related scalar
tensor theories | 25 pages, 1 figure | Phys. Rev. D 96, 124009 (2017) | 10.1103/PhysRevD.96.124009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Scalar tensor theories can be expressed in different frames, such as the
commonly-used Einstein and Jordan frames, and it is generally accepted that
cosmological observables are the same in these frames. We revisit this by
making a detailed side-by-side comparison of the quantities and equations in
two conformally re... | [
{
"created": "Wed, 20 Sep 2017 21:17:28 GMT",
"version": "v1"
}
] | 2017-12-20 | [
[
"Rondeau",
"François",
""
],
[
"Li",
"Baojiu",
""
]
] | Scalar tensor theories can be expressed in different frames, such as the commonly-used Einstein and Jordan frames, and it is generally accepted that cosmological observables are the same in these frames. We revisit this by making a detailed side-by-side comparison of the quantities and equations in two conformally rela... |
2301.09437 | Boris Kolev | Boris Kolev (LMPS), Rodrigue Desmorat (LMPS) | Souriau's Relativistic general covariant formulation of hyperelasticity
revisited | null | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present and modernize Souriau's 1958 geometric framework for Relativistic
continuous media, and enlighten the necessary and the ad hoc modeling choices
made since, focusing as much as possible on the Continuum Mechanics point of
view. We describe the general covariant formulation of Hyperelasticity in
General Rela... | [
{
"created": "Fri, 20 Jan 2023 15:28:38 GMT",
"version": "v1"
}
] | 2023-01-24 | [
[
"Kolev",
"Boris",
"",
"LMPS"
],
[
"Desmorat",
"Rodrigue",
"",
"LMPS"
]
] | We present and modernize Souriau's 1958 geometric framework for Relativistic continuous media, and enlighten the necessary and the ad hoc modeling choices made since, focusing as much as possible on the Continuum Mechanics point of view. We describe the general covariant formulation of Hyperelasticity in General Relati... |
0811.4609 | Maria Emilia Guimaraes | M. C. B. Abdalla (IFT/Unesp), M. E. X. Guimaraes (IF/Uff) and J. M.
Hoff da Silva (IFT/Unesp) | Brane-Wor(l)ds within Brans-Dicke Gravity | 10 pages. Invited contribution to the Special Issue "The Problems of
Modern Cosmology", on the occasion of Prof. S. D. Odintsov's 50th birthday | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review some recent results obtained from the application of the
Gauss-Codazzi formalism to brane-worlds models in the Brans-Dicke gravity. The
cases of 4-branes embedded in a six-dimensional with and without
$\mathbb{Z}_{2}$ symmetry are both analyzed.
| [
{
"created": "Thu, 27 Nov 2008 19:14:25 GMT",
"version": "v1"
}
] | 2008-12-31 | [
[
"Abdalla",
"M. C. B.",
"",
"IFT/Unesp"
],
[
"Guimaraes",
"M. E. X.",
"",
"IF/Uff"
],
[
"da Silva",
"J. M. Hoff",
"",
"IFT/Unesp"
]
] | We review some recent results obtained from the application of the Gauss-Codazzi formalism to brane-worlds models in the Brans-Dicke gravity. The cases of 4-branes embedded in a six-dimensional with and without $\mathbb{Z}_{2}$ symmetry are both analyzed. |
1805.07126 | Piero Nicolini | Ricardo Gallego Torrom\'e and Piero Nicolini | Theories with maximal acceleration | 20 pages, invited review for International Journal of Modern Physics
A (World Scientific); v2 with an updated reference list; v3 updated version
accepted for publication | Int. J. Mod. Phys. A 33 (2018) 1830019 (17 pages) | 10.1142/S0217751X18300193 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Maximal accelerations are related to the existence of a minimal time for a
given physical system. Such a minimal time can be either an intrinsic time
scale of the system or connected to a quantum gravity induced ultraviolet cut
off. In this paper we pedagogically introduce the four major formulations for
kinematics a... | [
{
"created": "Fri, 18 May 2018 10:16:08 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Jun 2018 15:35:33 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Aug 2018 12:46:44 GMT",
"version": "v3"
}
] | 2018-08-09 | [
[
"Torromé",
"Ricardo Gallego",
""
],
[
"Nicolini",
"Piero",
""
]
] | Maximal accelerations are related to the existence of a minimal time for a given physical system. Such a minimal time can be either an intrinsic time scale of the system or connected to a quantum gravity induced ultraviolet cut off. In this paper we pedagogically introduce the four major formulations for kinematics acc... |
0809.5223 | Chris Messenger | C. Messenger, R. Prix, M. A. Papa | Random template banks and relaxed lattice coverings | 13 pages, 10 figures, submitted to PRD | Phys.Rev.D79:104017,2009 | 10.1103/PhysRevD.79.104017 | LIGO-P080090-01-Z | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Template-based searches for gravitational waves are often limited by the
computational cost associated with searching large parameter spaces. The study
of efficient template banks, in the sense of using the smallest number of
templates, is therefore of great practical interest. The "traditional" approach
to template-... | [
{
"created": "Tue, 30 Sep 2008 15:15:59 GMT",
"version": "v1"
}
] | 2010-04-15 | [
[
"Messenger",
"C.",
""
],
[
"Prix",
"R.",
""
],
[
"Papa",
"M. A.",
""
]
] | Template-based searches for gravitational waves are often limited by the computational cost associated with searching large parameter spaces. The study of efficient template banks, in the sense of using the smallest number of templates, is therefore of great practical interest. The "traditional" approach to template-ba... |
1908.05337 | Sergio Vitorino Borba Gon\c{c}alves | G. A. Monerat, C. G. M. Santos, F. G. Alvarenga, S. V. B.
Gon\c{c}alves, R. Fracalossi, E. V. Corr\^ea Silva, G. Oliveira-Neto | Quantum Cosmology with many fluids and the choice of cosmological time | 26 pages, 25 figures, 2 tables | Brazilian Journal of Physics, 2019 | 10.1007/s13538-019-00720-2 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | In this work we propose the quantization of a cosmological model describing
the primordial universe filled with five barotropic fluids, namely: radiation,
dust, vacuum, cosmic strings and domain walls. We intend to identify which
fluid is best suited to provide phenomenologically the temporal variable in
accordance w... | [
{
"created": "Wed, 14 Aug 2019 20:26:12 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Dec 2019 14:52:15 GMT",
"version": "v2"
}
] | 2019-12-04 | [
[
"Monerat",
"G. A.",
""
],
[
"Santos",
"C. G. M.",
""
],
[
"Alvarenga",
"F. G.",
""
],
[
"Gonçalves",
"S. V. B.",
""
],
[
"Fracalossi",
"R.",
""
],
[
"Silva",
"E. V. Corrêa",
""
],
[
"Oliveira-Neto",
"G.",
"... | In this work we propose the quantization of a cosmological model describing the primordial universe filled with five barotropic fluids, namely: radiation, dust, vacuum, cosmic strings and domain walls. We intend to identify which fluid is best suited to provide phenomenologically the temporal variable in accordance wit... |
1006.1794 | Hedvika Kadlecova | Hedvika Kadlecova, Pavel Krtous | Gyratons on Melvin spacetime | 15 pages, no figures, journal version extended by appendices B and C | Phys.Rev.D82:044041,2010 | 10.1103/PhysRevD.82.044041 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present and analyze new exact gyraton solutions of algebraic type II on a
background which is static, cylindrically symmetric Melvin universe of type D.
For a vanishing electromagnetic field it reduces to previously studied gyratons
on Minkowski background. We demonstrate that the solutions are member of a more
ge... | [
{
"created": "Wed, 9 Jun 2010 13:16:57 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Jul 2010 12:18:39 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Sep 2010 10:06:47 GMT",
"version": "v3"
}
] | 2010-09-03 | [
[
"Kadlecova",
"Hedvika",
""
],
[
"Krtous",
"Pavel",
""
]
] | We present and analyze new exact gyraton solutions of algebraic type II on a background which is static, cylindrically symmetric Melvin universe of type D. For a vanishing electromagnetic field it reduces to previously studied gyratons on Minkowski background. We demonstrate that the solutions are member of a more gene... |
2302.12256 | Angela Chen | Angela Chen | Generalized Unruh effect: A potential resolution to the black hole
information paradox | 27 pages, 6 figures, accepted by PRD | null | 10.1103/PhysRevD.107.056014 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize the vacuum-Unruh effect to arbitrary excited states in the Fock
space and find that the Unruh mode at the horizon induces coherent excitation
on the canonical background ensemble measured by an accelerated observer. When
there is only one type of Unruh mode in the system, for example, the ones
outgoing ... | [
{
"created": "Thu, 23 Feb 2023 07:20:14 GMT",
"version": "v1"
}
] | 2023-03-29 | [
[
"Chen",
"Angela",
""
]
] | We generalize the vacuum-Unruh effect to arbitrary excited states in the Fock space and find that the Unruh mode at the horizon induces coherent excitation on the canonical background ensemble measured by an accelerated observer. When there is only one type of Unruh mode in the system, for example, the ones outgoing fr... |
2101.11153 | Maria Okounkova | Maria Okounkova, Will M. Farr, Maximiliano Isi, Leo C. Stein | Constraining gravitational wave amplitude birefringence and Chern-Simons
gravity with GWTC-2 | Updated to match published version, 8 pages (+6 pages of appendices),
7 figures | Phys. Rev. D 106, 044067 (2022) | 10.1103/PhysRevD.106.044067 | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We perform a new test of general relativity (GR) with signals from GWTC-2,
the LIGO and Virgo catalog of gravitational wave detections. We search for the
presence of amplitude birefringence, in which left versus right circularly
polarized modes of gravitational waves are exponentially enhanced and
suppressed during p... | [
{
"created": "Wed, 27 Jan 2021 01:17:06 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Oct 2022 18:31:33 GMT",
"version": "v2"
}
] | 2022-10-07 | [
[
"Okounkova",
"Maria",
""
],
[
"Farr",
"Will M.",
""
],
[
"Isi",
"Maximiliano",
""
],
[
"Stein",
"Leo C.",
""
]
] | We perform a new test of general relativity (GR) with signals from GWTC-2, the LIGO and Virgo catalog of gravitational wave detections. We search for the presence of amplitude birefringence, in which left versus right circularly polarized modes of gravitational waves are exponentially enhanced and suppressed during pro... |
1309.3905 | Viacheslav Emelyanov | Slava Emelyanov | Freely-moving observer in (quasi) anti de Sitter space | typos fixed, reference added, minor corrections | Phys. Rev. D 90, 044039 (2014) | 10.1103/PhysRevD.90.044039 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A quantum scalar field in anti de Sitter space is considered in two
coordinate systems: static and FRW-like ones. It is shown that quantum vacua
corresponding to each of these coordinatizations are not unitary equivalent. A
choice of a physical ground state between these vacua is discussed under
different setups.
| [
{
"created": "Mon, 16 Sep 2013 11:27:30 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Oct 2013 20:07:32 GMT",
"version": "v2"
}
] | 2014-08-20 | [
[
"Emelyanov",
"Slava",
""
]
] | A quantum scalar field in anti de Sitter space is considered in two coordinate systems: static and FRW-like ones. It is shown that quantum vacua corresponding to each of these coordinatizations are not unitary equivalent. A choice of a physical ground state between these vacua is discussed under different setups. |
1811.00382 | Ghulam Abbas | G. Abbas and M. Tahir | Models of Anisotropic Self-Gravitating Source in Einstein-Gauss-Bonnet
Gravity | 20 pages,16 Figures, Title Changed, Major revision included,accepted
version to appear in Adv.High Energy Physics | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have studied gravitational collapse and expansion of
non-static anisotropic fluid in $5D$ Einstein Gauss-Bonnet gravity. For this
purpose, the field equations have been modeled and evaluated for the given
source and geometry. The two metric functions have been expressed in terms of
parametric form o... | [
{
"created": "Sat, 27 Oct 2018 07:37:00 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Dec 2018 12:19:00 GMT",
"version": "v2"
}
] | 2018-12-19 | [
[
"Abbas",
"G.",
""
],
[
"Tahir",
"M.",
""
]
] | In this paper, we have studied gravitational collapse and expansion of non-static anisotropic fluid in $5D$ Einstein Gauss-Bonnet gravity. For this purpose, the field equations have been modeled and evaluated for the given source and geometry. The two metric functions have been expressed in terms of parametric form of ... |
gr-qc/9601050 | Kiyoshi Ezawa | Kiyoshi Ezawa | Nonperturbative solutions for canonical quantum gravity: an overview | 78 pages Latex, four figures included as eps-files.(References added,
some minor changes made in subsections 1.4, 3.2 and 7.3.) | Phys.Rept. 286 (1997) 271-348 | 10.1016/S0370-1573(96)00051-8 | null | gr-qc | null | In this paper we will make a survey of solutions to the Wheeler-Dewitt
equation which have been found up to now in Ashtekar's formulation for
canonical quantum gravity. Roughly speaking they are classified into two
categories, namely, Wilson-loop solutions and topological solutions. While the
program of finding solut... | [
{
"created": "Wed, 31 Jan 1996 13:36:34 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Feb 1996 04:07:53 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Ezawa",
"Kiyoshi",
""
]
] | In this paper we will make a survey of solutions to the Wheeler-Dewitt equation which have been found up to now in Ashtekar's formulation for canonical quantum gravity. Roughly speaking they are classified into two categories, namely, Wilson-loop solutions and topological solutions. While the program of finding solutio... |
2202.12665 | Jorge Ovalle | J. Ovalle, E. Contreras, Z. Stuchlik | Energy exchange between relativistic fluids: the polytropic case | 10 pages, 12 figures | null | 10.1140/epjc/s10052-022-10168-5 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We present a simple, analytic and straightforward method to elucidate the
effects produced by polytropic fluids on any other gravitational source, no
matter its nature, for static and spherically symmetric spacetimes. As a direct
application, we study the interaction between polytropes and perfect fluids
coexisting i... | [
{
"created": "Fri, 25 Feb 2022 12:49:13 GMT",
"version": "v1"
}
] | 2022-03-30 | [
[
"Ovalle",
"J.",
""
],
[
"Contreras",
"E.",
""
],
[
"Stuchlik",
"Z.",
""
]
] | We present a simple, analytic and straightforward method to elucidate the effects produced by polytropic fluids on any other gravitational source, no matter its nature, for static and spherically symmetric spacetimes. As a direct application, we study the interaction between polytropes and perfect fluids coexisting ins... |
2306.16647 | Shuichi Yokoyama | Shuichi Yokoyama | Relativistic Hydrostatic Structure Equations and Analytic Multilayer
Stellar Model | 1+27 pages, 2 figures, v2: minor modifications, a new subsection of
analytic multilayer solar model with 2 figures, references added, v3: minor
corrections, discussion improved | null | null | null | gr-qc astro-ph.HE astro-ph.SR hep-ph hep-th | http://creativecommons.org/licenses/by/4.0/ | The relativistic extension of the classic stellar structure equations is
investigated. It is pointed out that the Tolman-Oppenheimer-Volkov (TOV)
equation with the gradient equation for local gravitational mass can be made
complete as a closed set of differential equations by adding that for the
Tolman temperature wi... | [
{
"created": "Thu, 29 Jun 2023 03:16:26 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jul 2023 10:41:44 GMT",
"version": "v2"
},
{
"created": "Sun, 13 Aug 2023 15:13:52 GMT",
"version": "v3"
}
] | 2023-08-22 | [
[
"Yokoyama",
"Shuichi",
""
]
] | The relativistic extension of the classic stellar structure equations is investigated. It is pointed out that the Tolman-Oppenheimer-Volkov (TOV) equation with the gradient equation for local gravitational mass can be made complete as a closed set of differential equations by adding that for the Tolman temperature with... |
gr-qc/9704041 | Guillermo Mena | Guillermo A. Mena Marugan (IMAFF, CSIC, Madrid) | Canonical Quantization of the Gowdy Model | 13 pages, Revtex | Phys.Rev. D56 (1997) 908-919 | 10.1103/PhysRevD.56.908 | null | gr-qc | null | The family of Gowdy universes with the spatial topology of a three-torus is
studied both classically and quantum mechanically. Starting with the Ashtekar
formulation of Lorentzian general relativity, we introduce a gauge fixing
procedure to remove almost all of the non-physical degrees of freedom. In this
way, we arr... | [
{
"created": "Tue, 15 Apr 1997 09:05:24 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"Marugan",
"Guillermo A. Mena",
"",
"IMAFF, CSIC, Madrid"
]
] | The family of Gowdy universes with the spatial topology of a three-torus is studied both classically and quantum mechanically. Starting with the Ashtekar formulation of Lorentzian general relativity, we introduce a gauge fixing procedure to remove almost all of the non-physical degrees of freedom. In this way, we arriv... |
2008.00746 | Nikolaos Dimakis | N. Dimakis, T. Pailas, A. Paliathanasis, G. Leon, Petros A. Terzis and
T. Christodoulakis | Quantization of Einstein-aether Scalar field Cosmology | 10 pages, no figures, Latex2e source file, version accepted in EPJC | null | 10.1140/epjc/s10052-021-08933-z | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present, for the first time, the quantization process for the
Einstein-aether scalar field cosmology. We consider a cosmological theory
proposed as a Lorentz violating inflationary model, where the aether and scalar
fields interact through the assumption that the aether action constants are
ultra-local functions o... | [
{
"created": "Mon, 3 Aug 2020 09:58:46 GMT",
"version": "v1"
},
{
"created": "Sun, 31 Jan 2021 04:44:41 GMT",
"version": "v2"
}
] | 2021-03-17 | [
[
"Dimakis",
"N.",
""
],
[
"Pailas",
"T.",
""
],
[
"Paliathanasis",
"A.",
""
],
[
"Leon",
"G.",
""
],
[
"Terzis",
"Petros A.",
""
],
[
"Christodoulakis",
"T.",
""
]
] | We present, for the first time, the quantization process for the Einstein-aether scalar field cosmology. We consider a cosmological theory proposed as a Lorentz violating inflationary model, where the aether and scalar fields interact through the assumption that the aether action constants are ultra-local functions of ... |
gr-qc/0312084 | Docteur Philippe Grandclement | Philippe Grandclement, Mia Ihm, Vassiliki Kalogera, Krzystof
Belczynski | Searching for Gravitational Waves from the Inspiral of Precessing Binary
Systems: Astrophysical Expectations and Detection Efficiency of "Spiky''
Templates | 7 fig., accepted by Phys. Rev. D Minor modifications | Phys.Rev. D69 (2004) 102002 | 10.1103/PhysRevD.69.102002 | null | gr-qc astro-ph | null | Relativistic spin-orbit and spin-spin couplings has been shown to modify the
gravitational waveforms expected from inspiraling binaries with a black hole
and a neutron star. As a result inspiral signals may be missed due to
significant losses in signal-to-noise ratio, if precession effects are ignored
in gravitationa... | [
{
"created": "Thu, 18 Dec 2003 10:06:44 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Apr 2004 13:48:45 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Grandclement",
"Philippe",
""
],
[
"Ihm",
"Mia",
""
],
[
"Kalogera",
"Vassiliki",
""
],
[
"Belczynski",
"Krzystof",
""
]
] | Relativistic spin-orbit and spin-spin couplings has been shown to modify the gravitational waveforms expected from inspiraling binaries with a black hole and a neutron star. As a result inspiral signals may be missed due to significant losses in signal-to-noise ratio, if precession effects are ignored in gravitational-... |
gr-qc/9811033 | Ilja Schmelzer | Ilja Schmelzer | A Metric Theory of Gravity with Condensed Matter Interpretation | 11 pages Latex, no figures | null | null | WIAS preprint No. 447 (ISSN 0946-8633) | gr-qc | null | We define a metric theory of gravity with preferred Newtonian frame
(X^i(x),T(x)) by
L = L_{GR}
+ \Xi g^{mn}\delta_{ij}X^i_{,m}X^j_{,n}
- \Upsilon g^{mn}T_{,m}T_{,n}
It allows a condensed matter interpretation which generalizes LET to gravity.
The \Xi-term influences the age of the universe. \Upsilon>0 allo... | [
{
"created": "Wed, 11 Nov 1998 13:18:04 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Nov 1998 11:51:03 GMT",
"version": "v2"
},
{
"created": "Mon, 16 Nov 1998 12:32:27 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Schmelzer",
"Ilja",
""
]
] | We define a metric theory of gravity with preferred Newtonian frame (X^i(x),T(x)) by L = L_{GR} + \Xi g^{mn}\delta_{ij}X^i_{,m}X^j_{,n} - \Upsilon g^{mn}T_{,m}T_{,n} It allows a condensed matter interpretation which generalizes LET to gravity. The \Xi-term influences the age of the universe. \Upsilon>0 allows to avoid ... |
1608.01284 | Rhondale Tso | Rhondale Tso, Maximiliano Isi, Yanbei Chen, and Leo Stein | Modeling the Dispersion and Polarization Content of Gravitational Waves
for Tests of General Relativity | 4 pages, Presented at the Seventh Meeting on CPT and Lorentz
Symmetry, Bloomington, Indiana, June 20-24, 2016 | null | 10.1142/9789813148505_0052 | LIGO-P1600232 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a generic, phenomenological approach to modifying the dispersion
of gravitational waves, independent of corrections to the generation mechanism.
This model-independent approach encapsulates all previously proposed
parametrizations, including Lorentz violation in the Standard-Model Extension,
and provides a... | [
{
"created": "Wed, 3 Aug 2016 18:49:20 GMT",
"version": "v1"
}
] | 2017-05-31 | [
[
"Tso",
"Rhondale",
""
],
[
"Isi",
"Maximiliano",
""
],
[
"Chen",
"Yanbei",
""
],
[
"Stein",
"Leo",
""
]
] | We propose a generic, phenomenological approach to modifying the dispersion of gravitational waves, independent of corrections to the generation mechanism. This model-independent approach encapsulates all previously proposed parametrizations, including Lorentz violation in the Standard-Model Extension, and provides a r... |
2011.02317 | Carlos Ortiz | C. Ortiz | Surface Tension: Accelerated Expansion, Coincidence Problem & Hubble
Tension | 15 pages, 5 figures, IJMPD Accepted | null | 10.1142/S0218271820501151 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we give a physical explanation to the accelerated expansion of
the Universe, alleviating the tension between the discrepancy of Hubble
constant measurements. By the Euler Cauchy stress principle, we identify a
controversy on the lack of consideration of the surface forces contemplated in
the study of th... | [
{
"created": "Mon, 2 Nov 2020 23:44:18 GMT",
"version": "v1"
}
] | 2021-02-17 | [
[
"Ortiz",
"C.",
""
]
] | In this paper we give a physical explanation to the accelerated expansion of the Universe, alleviating the tension between the discrepancy of Hubble constant measurements. By the Euler Cauchy stress principle, we identify a controversy on the lack of consideration of the surface forces contemplated in the study of the ... |
gr-qc/0106091 | Daniele Oriti | Daniele Oriti | Spacetime geometry from algebra: spin foam models for non-perturbative
quantum gravity | 68 pages, 16 figures, LaTex; v2: minor changes; v3: several points
clarified, references added; to appear in Rep. Prog. Phys | Rept.Prog.Phys.64:1703-1756,2001 | 10.1088/0034-4885/64/12/203 | DAMTP-2001-86 | gr-qc hep-th | null | This is an introduction to spin foam models for non-perturbative quantum
gravity, an approach that lies at the point of convergence of many different
research areas, including loop quantum gravity, topological quantum field
theories, path integral quantum gravity, lattice field theory, matrix models,
category theory,... | [
{
"created": "Thu, 28 Jun 2001 15:52:35 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Jul 2001 13:45:11 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Oct 2001 17:51:08 GMT",
"version": "v3"
}
] | 2011-02-16 | [
[
"Oriti",
"Daniele",
""
]
] | This is an introduction to spin foam models for non-perturbative quantum gravity, an approach that lies at the point of convergence of many different research areas, including loop quantum gravity, topological quantum field theories, path integral quantum gravity, lattice field theory, matrix models, category theory, s... |
2207.03799 | Maykoll Reyes | J. M. Carmona, J. L. Cort\'es, J. J. Relancio, M. A. Reyes | Time delays, choice of energy-momentum variables and relative locality
in doubly special relativity | 14 pages | null | 10.1103/PhysRevD.106.064045 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Doubly Special Relativity (DSR) theories consider (quantum-gravity motivated)
deformations of the symmetries of special relativity compatible with a
relativity principle. The existence of time delays for massless particles, one
of their proposed phenomenological consequences, is a delicate question, since,
contrary t... | [
{
"created": "Fri, 8 Jul 2022 10:08:33 GMT",
"version": "v1"
}
] | 2022-10-12 | [
[
"Carmona",
"J. M.",
""
],
[
"Cortés",
"J. L.",
""
],
[
"Relancio",
"J. J.",
""
],
[
"Reyes",
"M. A.",
""
]
] | Doubly Special Relativity (DSR) theories consider (quantum-gravity motivated) deformations of the symmetries of special relativity compatible with a relativity principle. The existence of time delays for massless particles, one of their proposed phenomenological consequences, is a delicate question, since, contrary to ... |
gr-qc/0309112 | Vitor Cardoso | Vitor Cardoso, Jose' P. S. Lemos, Shijun Yoshida | Quasinormal modes of Schwarzschild black holes in four and higher
dimensions | 12 pages, 5 figures, RevTeX4. v2. Typos corrected, references added | Phys.Rev. D69 (2004) 044004 | 10.1103/PhysRevD.69.044004 | null | gr-qc astro-ph hep-ph hep-th | null | We make a thorough investigation of the asymptotic quasinormal modes of the
four and five-dimensional Schwarzschild black hole for scalar, electromagnetic
and gravitational perturbations. Our numerical results give full support to all
the analytical predictions by Motl and Neitzke, for the leading term. We also
compu... | [
{
"created": "Tue, 23 Sep 2003 13:47:33 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Sep 2003 17:01:58 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Cardoso",
"Vitor",
""
],
[
"Lemos",
"Jose' P. S.",
""
],
[
"Yoshida",
"Shijun",
""
]
] | We make a thorough investigation of the asymptotic quasinormal modes of the four and five-dimensional Schwarzschild black hole for scalar, electromagnetic and gravitational perturbations. Our numerical results give full support to all the analytical predictions by Motl and Neitzke, for the leading term. We also compute... |
0709.1512 | Luciano Iess | B. Bertotti, N. Ashby, L. Iess | The effect of the motion of the Sun on the light-time in interplanetary
relativistic experiments | Final version accepted by Classical and Quantum Gravity (8 Jan. 2008) | Class. Quantum Grav. 25 045013 | 10.1088/0264-9381/25/4/045013 | null | gr-qc physics.gen-ph | null | In 2002 a measurement of the effect of solar gravity upon the phase of
coherent microwave beams passing near the Sun has been carried out with the
Cassini mission, allowing a very accurate measurement of the PPN parameter
$\gamma$. The data have been analyzed with NASA's Orbit Determination Program
(ODP) in the Baryc... | [
{
"created": "Tue, 11 Sep 2007 00:27:05 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Sep 2007 15:13:54 GMT",
"version": "v2"
},
{
"created": "Thu, 27 Sep 2007 11:02:31 GMT",
"version": "v3"
},
{
"created": "Sat, 27 Oct 2007 10:28:11 GMT",
"version": "v4"
},
{
"c... | 2009-02-01 | [
[
"Bertotti",
"B.",
""
],
[
"Ashby",
"N.",
""
],
[
"Iess",
"L.",
""
]
] | In 2002 a measurement of the effect of solar gravity upon the phase of coherent microwave beams passing near the Sun has been carried out with the Cassini mission, allowing a very accurate measurement of the PPN parameter $\gamma$. The data have been analyzed with NASA's Orbit Determination Program (ODP) in the Barycen... |
0801.1150 | Chunnong Zhao | C. Zhao, L. Ju, Y. Fan, S. Gras. B. J. J. Slagmolen, H. Miao, P.
Barriga D.G. Blair, D. J. Hosken, A. F. Brooks, P. J. Veitch, D. Mudge, J.
Munch | Observation of Three Mode Parametric Interactions in Long Optical
Cavities | 10 pages and 5 figures | null | 10.1103/PhysRevA.78.023807 | null | gr-qc | null | We report the first observation of three-mode opto-acoustic parametric
interactions of the type predicted to cause parametric instabilities in an 80 m
long, high optical power cavity that uses suspended sapphire mirrors. Resonant
interaction occurs between two distinct optical modes and an acoustic mode of
one mirror... | [
{
"created": "Tue, 8 Jan 2008 03:07:03 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Zhao",
"C.",
""
],
[
"Ju",
"L.",
""
],
[
"Fan",
"Y.",
""
],
[
"Slagmolen",
"S. Gras. B. J. J.",
""
],
[
"Miao",
"H.",
""
],
[
"Blair",
"P. Barriga D. G.",
""
],
[
"Hosken",
"D. J.",
""
],
[
"Brooks... | We report the first observation of three-mode opto-acoustic parametric interactions of the type predicted to cause parametric instabilities in an 80 m long, high optical power cavity that uses suspended sapphire mirrors. Resonant interaction occurs between two distinct optical modes and an acoustic mode of one mirror w... |
2009.03404 | Mohsen Fathi | Mohsen Fathi, Marco Olivares, J.R. Villanueva | Gravitational Rutherford scattering of electrically charged particles
from a charged Weyl black hole | 23 pages, 9 figures | Eur. Phys. J. Plus 136:420 (2021) | 10.1140/epjp/s13360-021-01441-9 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Considering electrically charged test particles, we continue our study of the
exterior dynamics of a charged Weyl black hole which has been previously
investigated regarding the motion of mass-less and (neutral) massive particles.
In this paper, the deflecting trajectories of charged particles are designated
as being... | [
{
"created": "Mon, 7 Sep 2020 20:25:35 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Nov 2020 22:41:31 GMT",
"version": "v2"
},
{
"created": "Wed, 14 Apr 2021 17:09:42 GMT",
"version": "v3"
}
] | 2021-04-27 | [
[
"Fathi",
"Mohsen",
""
],
[
"Olivares",
"Marco",
""
],
[
"Villanueva",
"J. R.",
""
]
] | Considering electrically charged test particles, we continue our study of the exterior dynamics of a charged Weyl black hole which has been previously investigated regarding the motion of mass-less and (neutral) massive particles. In this paper, the deflecting trajectories of charged particles are designated as being g... |
1304.3176 | Richard O'Shaughnessy | (1) Larne Pekowsky, (2) Richard O'Shaughnessy, (1) Jim Healy, (1)
Deirdre Shoemaker ((1) Center for Relativistic Astrophysics, Georgia Tech,
(2) Center for Gravitation and Cosmology, University of Wisconsin-Milwaukee) | Comparing gravitational waves from nonprecessing and precessing black
hole binaries in the corotating frame | Submitted to PRD; v2 corrects mass scales; v3 repairs and improves
fig 2 and count | null | 10.1103/PhysRevD.88.024040 | LIGO DCC P1300057 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Previous analytic and numerical calculations suggest that, at each instant,
the emission from a precessing black hole binary closely resembles the emission
from a nonprecessing analog. In this paper we quantitatively explore the
validity and limitations of that correspondence, extracting the radiation from
a large co... | [
{
"created": "Thu, 11 Apr 2013 01:11:07 GMT",
"version": "v1"
},
{
"created": "Fri, 24 May 2013 19:05:07 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Jul 2013 20:12:20 GMT",
"version": "v3"
}
] | 2013-08-09 | [
[
"Pekowsky",
"Larne",
""
],
[
"O'Shaughnessy",
"Richard",
""
],
[
"Healy",
"Jim",
""
],
[
"Shoemaker",
"Deirdre",
""
]
] | Previous analytic and numerical calculations suggest that, at each instant, the emission from a precessing black hole binary closely resembles the emission from a nonprecessing analog. In this paper we quantitatively explore the validity and limitations of that correspondence, extracting the radiation from a large coll... |
1705.07544 | Anzhong Wang | Tao Zhu, Anzhong Wang, Gerald Cleaver, Klaus Kirsten and Qin Sheng | Pre-inflationary universe in loop quantum cosmology | revtex4, 23 figures, and 5 tables. Some typos were corrected. Phys.
Rev. D 96, 083520 (2017) | Phys. Rev. D 96, 083520 (2017) | 10.1103/PhysRevD.96.083520 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The evolutions of the flat FLRW universe and its linear perturbations are
studied systematically in the dressed metric approach of LQC. When it is
dominated by the kinetic energy of the inflaton at the quantum bounce, the
evolution of the background can be divided into three different phases prior to
the preheating, ... | [
{
"created": "Mon, 22 May 2017 03:03:16 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Jun 2017 00:52:02 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Sep 2017 01:44:14 GMT",
"version": "v3"
},
{
"created": "Tue, 24 Oct 2017 15:17:31 GMT",
"version": "v4"
}
] | 2017-10-25 | [
[
"Zhu",
"Tao",
""
],
[
"Wang",
"Anzhong",
""
],
[
"Cleaver",
"Gerald",
""
],
[
"Kirsten",
"Klaus",
""
],
[
"Sheng",
"Qin",
""
]
] | The evolutions of the flat FLRW universe and its linear perturbations are studied systematically in the dressed metric approach of LQC. When it is dominated by the kinetic energy of the inflaton at the quantum bounce, the evolution of the background can be divided into three different phases prior to the preheating, {\... |
1107.1336 | Parthasarathi Mitra | Bhramar Chatterjee and P. Mitra | Regularizing tunnelling calculations of Hawking temperature | 4 pages; expanded | Gen. Rel. Grav. 44 (2012) 2365 | 10.1007/s10714-012-1396-6 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Attempts to understand Hawking radiation as tunnelling across a black hole
horizon require the consideration of singular integrals. Although Schwarzschild
coordinates lead to the standard Hawking temperature, isotropic radial
coordinates may appear to produce an incorrect value. It is demonstrated here
how the proper... | [
{
"created": "Thu, 7 Jul 2011 10:18:28 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Jul 2011 09:12:25 GMT",
"version": "v2"
},
{
"created": "Fri, 1 Jun 2012 06:25:19 GMT",
"version": "v3"
}
] | 2014-05-22 | [
[
"Chatterjee",
"Bhramar",
""
],
[
"Mitra",
"P.",
""
]
] | Attempts to understand Hawking radiation as tunnelling across a black hole horizon require the consideration of singular integrals. Although Schwarzschild coordinates lead to the standard Hawking temperature, isotropic radial coordinates may appear to produce an incorrect value. It is demonstrated here how the proper r... |
1806.05042 | Ghulam Abbas | G. Abbas and H. Nazar | Complexity Factor For Static Anisotropic Self-Gravitating Source in
$f(R)$ Gravity | 16 pages, no figure accepted for publication in EPJC | Eur. Phys. J. C (2018) 78:510 | 10.1140/epjc/s10052-018-5973-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In a recent paper, Herrera \cite{2} (L. Herrera: Phys. Rev. D97,
044010(2018)) have proposed a new definition of complexity for static
self-gravitating fluid in General Relativity. In the present article, we
implement this definition of complexity for static self-gravitating fluid to
case of $f(R)$ gravity. Here, we ... | [
{
"created": "Mon, 11 Jun 2018 09:55:38 GMT",
"version": "v1"
}
] | 2018-10-30 | [
[
"Abbas",
"G.",
""
],
[
"Nazar",
"H.",
""
]
] | In a recent paper, Herrera \cite{2} (L. Herrera: Phys. Rev. D97, 044010(2018)) have proposed a new definition of complexity for static self-gravitating fluid in General Relativity. In the present article, we implement this definition of complexity for static self-gravitating fluid to case of $f(R)$ gravity. Here, we fo... |
gr-qc/0505141 | Arunava Bhadra Dr. | Arunava Bhadra, and Kabita Sarkar | On static spherically symmetric solutions of the vacuum Brans-Dicke
theory | 15 pages, To be published in Gen. Rel. and Grav, typos in references
corrected | Gen.Rel.Grav.37:2189-2199,2005 | 10.1007/s10714-005-0181-1 | null | gr-qc | null | It is shown that among the four classes of the static spherically symmetric
solution of the vacuum Brans-Dicke theory of gravity only two are really
independent. Further by matching exterior and interior (due to physically
reasonable spherically symmetric matter source) scalar fields it is found that
only Brans class... | [
{
"created": "Mon, 30 May 2005 17:32:48 GMT",
"version": "v1"
},
{
"created": "Wed, 22 Feb 2006 07:47:35 GMT",
"version": "v2"
}
] | 2010-11-19 | [
[
"Bhadra",
"Arunava",
""
],
[
"Sarkar",
"Kabita",
""
]
] | It is shown that among the four classes of the static spherically symmetric solution of the vacuum Brans-Dicke theory of gravity only two are really independent. Further by matching exterior and interior (due to physically reasonable spherically symmetric matter source) scalar fields it is found that only Brans class I... |
2309.06022 | Naosad Alam | Naosad Alam, Subrata Pal, A. Rahmansyah, A. Sulaksono | Impact of modified gravity theory on neutron star and nuclear matter
properties | 16 pages, 9 figures, Version to appear in PRD | null | null | null | gr-qc nucl-th | http://creativecommons.org/licenses/by/4.0/ | New observational data, measured with a high degree of accuracy, of compact
isolated neutron stars and binary stars in gravitational wave remnants have the
potential to explore the strong field gravity. Within the framework of
energy-momentum squared gravity (EMSG) theory we study its impact on several
properties of ... | [
{
"created": "Tue, 12 Sep 2023 07:47:49 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Feb 2024 08:13:01 GMT",
"version": "v2"
}
] | 2024-02-06 | [
[
"Alam",
"Naosad",
""
],
[
"Pal",
"Subrata",
""
],
[
"Rahmansyah",
"A.",
""
],
[
"Sulaksono",
"A.",
""
]
] | New observational data, measured with a high degree of accuracy, of compact isolated neutron stars and binary stars in gravitational wave remnants have the potential to explore the strong field gravity. Within the framework of energy-momentum squared gravity (EMSG) theory we study its impact on several properties of ne... |
1111.0638 | Miguel Campiglia | Miguel Campiglia | Polymer representations and geometric quantization | 15 pages | null | null | IGC-11/10-2 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Polymer representations of the Weyl algebra of linear systems provide the
simplest analogues of the representation used in loop quantum gravity. The
construction of these representations is algebraic, based on the
Gelfand-Naimark-Segal construction. Is it possible to understand these
representations from a Geometric ... | [
{
"created": "Wed, 2 Nov 2011 20:02:26 GMT",
"version": "v1"
}
] | 2011-11-04 | [
[
"Campiglia",
"Miguel",
""
]
] | Polymer representations of the Weyl algebra of linear systems provide the simplest analogues of the representation used in loop quantum gravity. The construction of these representations is algebraic, based on the Gelfand-Naimark-Segal construction. Is it possible to understand these representations from a Geometric Qu... |
1804.07264 | Kazumasa Okabayashi | Kei-ichi Maeda, Kazumasa Okabayashi, Hirotada Okawa | Maximal Efficiency of Collisional Penrose Process with Spinning
Particles | 17 pages, 1 table, 17 figures; published version | Phys. Rev. D 98, 064027 (2018) | 10.1103/PhysRevD.98.064027 | WU-AP/1803/18 | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze collisional Penrose process of spinning test particles in an
extreme Kerr black hole. We consider that two particles plunge into the black
hole from infinity and collide near the black hole. For the collision of two
massive particles, if the spins of particles are $s_1 \approx 0.01379\mu M$ and
$s_2 \appro... | [
{
"created": "Thu, 19 Apr 2018 16:35:11 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Sep 2018 21:09:55 GMT",
"version": "v2"
}
] | 2018-09-26 | [
[
"Maeda",
"Kei-ichi",
""
],
[
"Okabayashi",
"Kazumasa",
""
],
[
"Okawa",
"Hirotada",
""
]
] | We analyze collisional Penrose process of spinning test particles in an extreme Kerr black hole. We consider that two particles plunge into the black hole from infinity and collide near the black hole. For the collision of two massive particles, if the spins of particles are $s_1 \approx 0.01379\mu M$ and $s_2 \approx ... |
1808.00632 | Shaoqi Hou | Yungui Gong, Shaoqi Hou, Eleftherios Papantonopoulos, Dimitrios
Tzortzis | Gravitational waves and the polarizations in Ho\v{r}ava gravity after
GW170817 | 24 pages, 4 figures | Phys. Rev. D 98, 104017 (2018) | 10.1103/PhysRevD.98.104017 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational waves of Ho\v{r}ava gravity, their polarization states and
their possible observational signatures are discussed. Using the
gauge-invariant variable formalism, we found the three polarization modes in
Ho\v{r}ava gravity excited by the three physical degrees of freedom contained
in this theory. In pa... | [
{
"created": "Thu, 2 Aug 2018 02:01:11 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Aug 2018 00:56:05 GMT",
"version": "v2"
},
{
"created": "Thu, 15 Nov 2018 00:56:13 GMT",
"version": "v3"
}
] | 2018-11-16 | [
[
"Gong",
"Yungui",
""
],
[
"Hou",
"Shaoqi",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Tzortzis",
"Dimitrios",
""
]
] | The gravitational waves of Ho\v{r}ava gravity, their polarization states and their possible observational signatures are discussed. Using the gauge-invariant variable formalism, we found the three polarization modes in Ho\v{r}ava gravity excited by the three physical degrees of freedom contained in this theory. In part... |
1902.01865 | Kyriakos Destounis | Hang Liu, Ziyu Tang, Kyriakos Destounis, Bin Wang, Eleftherios
Papantonopoulos, Hongbao Zhang | Strong Cosmic Censorship in higher-dimensional Reissner-Nordstr\"{o}m-de
Sitter spacetime | 15 pages, 1 figure, matches published version | J. High Energ. Phys. (2019) 2019: 187 | 10.1007/JHEP03(2019)187 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It was recently shown that Strong Cosmic Censorship might be violated for
near-extremally-charged black holes in 4-dimensional de Sitter space under
scalar perturbations. Here, we extend the study of neutral massless scalar
perturbations in higher dimensions and discuss the dimensional influence on the
validity of St... | [
{
"created": "Tue, 5 Feb 2019 19:00:02 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Apr 2019 13:16:47 GMT",
"version": "v2"
}
] | 2019-04-02 | [
[
"Liu",
"Hang",
""
],
[
"Tang",
"Ziyu",
""
],
[
"Destounis",
"Kyriakos",
""
],
[
"Wang",
"Bin",
""
],
[
"Papantonopoulos",
"Eleftherios",
""
],
[
"Zhang",
"Hongbao",
""
]
] | It was recently shown that Strong Cosmic Censorship might be violated for near-extremally-charged black holes in 4-dimensional de Sitter space under scalar perturbations. Here, we extend the study of neutral massless scalar perturbations in higher dimensions and discuss the dimensional influence on the validity of Stro... |
1109.0676 | Sumanta Chakraborty | Sumanta Chakraborty and Subenoy Chakraborty | Trajectory around a spherically symmetric non-rotating black hole | 13 pages, 6 figures | Can.j. phys. 89: 689-695(2011) | 10.1139/p11-032 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Trajectory of a test particle or a photon around a general spherical black
hole is studied and bending of light trajectory is investigated.
Pseudo-Newtonian gravitational potential describing the gravitational field of
the black hole is determined and is compared with the related effective
potential for test particle... | [
{
"created": "Sun, 4 Sep 2011 06:17:17 GMT",
"version": "v1"
}
] | 2015-05-30 | [
[
"Chakraborty",
"Sumanta",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | Trajectory of a test particle or a photon around a general spherical black hole is studied and bending of light trajectory is investigated. Pseudo-Newtonian gravitational potential describing the gravitational field of the black hole is determined and is compared with the related effective potential for test particle m... |
0907.0671 | Deirdre Shoemaker | James Healy, Janna Levin and Deirdre Shoemaker | Zoom-Whirl Orbits in Black Hole Binaries | Replaced with published version | Phys.Rev.Lett.103:131101,2009 | 10.1103/PhysRevLett.103.131101 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Zoom-whirl behavior has the reputation of being a rare phenomenon. The
concern has been that gravitational radiation would drain angular momentum so
rapidly that generic orbits would circularize before zoom-whirl behavior could
play out, and only rare highly tuned orbits would retain their imprint. Using
full numeric... | [
{
"created": "Fri, 3 Jul 2009 19:08:53 GMT",
"version": "v1"
},
{
"created": "Wed, 23 Sep 2009 18:37:37 GMT",
"version": "v2"
}
] | 2009-10-29 | [
[
"Healy",
"James",
""
],
[
"Levin",
"Janna",
""
],
[
"Shoemaker",
"Deirdre",
""
]
] | Zoom-whirl behavior has the reputation of being a rare phenomenon. The concern has been that gravitational radiation would drain angular momentum so rapidly that generic orbits would circularize before zoom-whirl behavior could play out, and only rare highly tuned orbits would retain their imprint. Using full numerical... |
2307.04237 | Partha Pratim Nath | Partha Pratim Nath, Debojit Sarma | Study of exponential wormhole metric in $f(R)$ gravity | V2 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we have studied an "exponential form" of spacetime metric:
\begin{equation*} ds^2 = -e^{-\frac{2m}{r}}dt^2 +e^{\frac{2m}{r}}dr^2 +
e^{\frac{2m}{r}}[r^2 d\theta^2 + r^2 \sin^2\theta d\phi^2] \end{equation*} in
some of the viable $f(R)$ gravity models, viz. exponential gravity model,
Starobinsky gravity m... | [
{
"created": "Sun, 9 Jul 2023 17:53:37 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Jul 2023 15:48:40 GMT",
"version": "v2"
}
] | 2023-07-18 | [
[
"Nath",
"Partha Pratim",
""
],
[
"Sarma",
"Debojit",
""
]
] | In this work, we have studied an "exponential form" of spacetime metric: \begin{equation*} ds^2 = -e^{-\frac{2m}{r}}dt^2 +e^{\frac{2m}{r}}dr^2 + e^{\frac{2m}{r}}[r^2 d\theta^2 + r^2 \sin^2\theta d\phi^2] \end{equation*} in some of the viable $f(R)$ gravity models, viz. exponential gravity model, Starobinsky gravity mod... |
0710.4425 | Carles Bona | C. Bona and Dana Alic | Gauge and constraint degrees of freedom: from analytical to numerical
approximations in General Relativity | Talk given at the Spanish Relativity Meeting, Tenerife, September
2007 | null | 10.1051/eas:0830006 | null | gr-qc | null | The harmonic formulation of Einstein's field equations is considered, where
the gauge conditions are introduced as dynamical constraints. The difference
between the fully constrained approach (used in analytical approximations) and
the free evolution one (used in most numerical approximations) is pointed out.
As a ge... | [
{
"created": "Wed, 24 Oct 2007 10:22:23 GMT",
"version": "v1"
}
] | 2009-11-13 | [
[
"Bona",
"C.",
""
],
[
"Alic",
"Dana",
""
]
] | The harmonic formulation of Einstein's field equations is considered, where the gauge conditions are introduced as dynamical constraints. The difference between the fully constrained approach (used in analytical approximations) and the free evolution one (used in most numerical approximations) is pointed out. As a gene... |
2212.06794 | Sarbari Guha Dr. | Sucheta Datta, Sarbari Guha and Deeshani Mitra | Memory Effect of Plane Gravitational Wave Pulses | The paper is being rewritten to give a completely new look and will
be uploaded as a fresh manuscript | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | A gravitational wave pulse, while passing through spacetime, brings about a
change in the relative separation between free particles. This `memory effect'
serves as one of the signatures of gravitational waves. In this paper, we
consider some viable pulse profiles which are not yet analyzed by others (e.g.,
$u^{-4}$,... | [
{
"created": "Tue, 13 Dec 2022 18:20:26 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Jul 2023 07:08:06 GMT",
"version": "v2"
}
] | 2023-07-13 | [
[
"Datta",
"Sucheta",
""
],
[
"Guha",
"Sarbari",
""
],
[
"Mitra",
"Deeshani",
""
]
] | A gravitational wave pulse, while passing through spacetime, brings about a change in the relative separation between free particles. This `memory effect' serves as one of the signatures of gravitational waves. In this paper, we consider some viable pulse profiles which are not yet analyzed by others (e.g., $u^{-4}$, $... |
gr-qc/0504050 | Frederique Marion | L.Blackburn, F.Beauville, M.-A.Bizouard, L.Bosi, P.Brady, L.Brocco,
D.Brown, D.Buskulic, S.Chatterji, N.Christensen, A.-C.Clapson, S.Fairhurst,
D.Grosjean, G.Guidi, P.Hello, E.Katsavounidis, M.Knight, A.Lazzarini,
F.Marion, B.Mours, F.Ricci, A.Vicere', M.Zanolin (The joint LIGO/Virgo
working group) | A First Comparison Between LIGO and Virgo Inspiral Search Pipelines | GWDAW-9 proceedings | Class.Quant.Grav. 22 (2005) S1149-S1158 | null | null | gr-qc | null | This article reports on a project that is the first step the LIGO Scientific
Collaboration and the Virgo Collaboration have taken to prepare for the mutual
search for inspiral signals. The project involved comparing the analysis
pipelines of the two collaborations on data sets prepared by both sides,
containing simul... | [
{
"created": "Tue, 12 Apr 2005 14:02:32 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Blackburn",
"L.",
"",
"The joint LIGO/Virgo\n working group"
],
[
"Beauville",
"F.",
"",
"The joint LIGO/Virgo\n working group"
],
[
"Bizouard",
"M. -A.",
"",
"The joint LIGO/Virgo\n working group"
],
[
"Bosi",
"L.",
"",
"The joint LI... | This article reports on a project that is the first step the LIGO Scientific Collaboration and the Virgo Collaboration have taken to prepare for the mutual search for inspiral signals. The project involved comparing the analysis pipelines of the two collaborations on data sets prepared by both sides, containing simulat... |
0712.1089 | Ibrar Hussain | Ibrar Hussain, Fazal M. Mahomed and Asghar Qadir | Second-Order Approximate Symmetries of the Geodesic Equations for the
Reissner-Nordstr\"om Metric and Re-Scaling of Energy of a Test Particle | This is a contribution to the Proc. of the Seventh International
Conference ''Symmetry in Nonlinear Mathematical Physics'' (June 24-30, 2007,
Kyiv, Ukraine), published in SIGMA (Symmetry, Integrability and Geometry:
Methods and Applications) at http://www.emis.de/journals/SIGMA/ | SIGMA 3:115,2007 | 10.3842/SIGMA.2007.115 | null | gr-qc nlin.SI | null | Following the use of approximate symmetries for the Schwarzschild spacetime
by A.H. Kara, F.M. Mahomed and A. Qadir (Nonlinear Dynam., to appear), we have
investigated the exact and approximate symmetries of the system of geodesic
equations for the Reissner-Nordstr\"om spacetime (RN). For this purpose we are
forced t... | [
{
"created": "Fri, 7 Dec 2007 08:16:34 GMT",
"version": "v1"
}
] | 2008-12-19 | [
[
"Hussain",
"Ibrar",
""
],
[
"Mahomed",
"Fazal M.",
""
],
[
"Qadir",
"Asghar",
""
]
] | Following the use of approximate symmetries for the Schwarzschild spacetime by A.H. Kara, F.M. Mahomed and A. Qadir (Nonlinear Dynam., to appear), we have investigated the exact and approximate symmetries of the system of geodesic equations for the Reissner-Nordstr\"om spacetime (RN). For this purpose we are forced to ... |
0812.1348 | Salvatore Capozziello | S. Bellucci, S. Capozziello, M. De Laurentis, V. Faraoni | Position and frequency shifts induced by massive modes of the
gravitational wave background in alternative gravity | 9 pages, 1 figure | Phys.Rev.D79:104004,2009 | 10.1103/PhysRevD.79.104004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Alternative theories of gravity predict the presence of massive scalar,
vector, and tensor gravitational wave modes in addition to the standard
massless spin~2 graviton of general relativity. The deflection and frequency
shift effects on light from distant sources propagating through a stochastic
background of gravit... | [
{
"created": "Sun, 7 Dec 2008 13:53:18 GMT",
"version": "v1"
},
{
"created": "Thu, 16 Apr 2009 09:50:37 GMT",
"version": "v2"
}
] | 2009-10-29 | [
[
"Bellucci",
"S.",
""
],
[
"Capozziello",
"S.",
""
],
[
"De Laurentis",
"M.",
""
],
[
"Faraoni",
"V.",
""
]
] | Alternative theories of gravity predict the presence of massive scalar, vector, and tensor gravitational wave modes in addition to the standard massless spin~2 graviton of general relativity. The deflection and frequency shift effects on light from distant sources propagating through a stochastic background of gravitat... |
2312.00607 | Yurii Ignat'ev | Yu.G. Ignat'ev | Formation of supermassive nuclei of Black holes in the early Universe by
the mechanism of scalar-gravitational instability. III. Large scale picture | 9 pages, 4 figures, 21 references | Gravit. Cosmol. 2024, 30, 141-148 | 10.1134/S0202289324700038 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dependence of the parameters of the evolution of scalarly charged Black
Holes (BHs) in the early Universe on the parameters of field-theoretic theories
of interaction, the influence of the geometric factor of the structure of the
relative position of BHs on the limitation of their maximum mass are studied,
the pr... | [
{
"created": "Fri, 1 Dec 2023 14:14:10 GMT",
"version": "v1"
}
] | 2024-04-11 | [
[
"Ignat'ev",
"Yu. G.",
""
]
] | The dependence of the parameters of the evolution of scalarly charged Black Holes (BHs) in the early Universe on the parameters of field-theoretic theories of interaction, the influence of the geometric factor of the structure of the relative position of BHs on the limitation of their maximum mass are studied, the prob... |
gr-qc/0306057 | Archana Pai | A. Pai, K. Rajesh Nayak, S. V. Dhurandhar and J-Y. Vinet | Time Delay Interferometry and LISA Optimal Sensitivity | LaTeX, 6 pages, 4 figures, To appear in Proceedings of XXXVIIIth
Recontres de Moriond: Gravitational Waves and Experimental Gravity | null | null | null | gr-qc | null | The sensitivity of LISA depends on the suppression of several noise sources;
dominant one is laser frequency noise. It has been shown that the six Doppler
data streams obtained from three space-crafts can be appropriately time delayed
and optimally combined to cancel this laser frequency noise. We show that the
optim... | [
{
"created": "Fri, 13 Jun 2003 10:04:37 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pai",
"A.",
""
],
[
"Nayak",
"K. Rajesh",
""
],
[
"Dhurandhar",
"S. V.",
""
],
[
"Vinet",
"J-Y.",
""
]
] | The sensitivity of LISA depends on the suppression of several noise sources; dominant one is laser frequency noise. It has been shown that the six Doppler data streams obtained from three space-crafts can be appropriately time delayed and optimally combined to cancel this laser frequency noise. We show that the optimal... |
1005.5589 | Subenoy Chakraborty | Nairwita Mazumder, Subenoy Chakraborty | Generalized Second Law of Thermodynamics on the Event Horizon for
Interacting Dark Energy | 8 pages, 2 figures | null | 10.1007/s10773-011-0884-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here we are trying to find the conditions for the validity of the generalized
second law of thermodynamics (GSLT) assuming the first law of thermodynamics on
the event horizon in both cases when the FRW universe is filled with
interacting two fluid system- one in the form of cold dark matter and the other
is either h... | [
{
"created": "Mon, 31 May 2010 05:49:41 GMT",
"version": "v1"
}
] | 2015-05-19 | [
[
"Mazumder",
"Nairwita",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | Here we are trying to find the conditions for the validity of the generalized second law of thermodynamics (GSLT) assuming the first law of thermodynamics on the event horizon in both cases when the FRW universe is filled with interacting two fluid system- one in the form of cold dark matter and the other is either hol... |
gr-qc/0405126 | Gaurav Khanna | Daniel Cartin, Gaurav Khanna, Martin Bojowald | Generating function techniques for loop quantum cosmology | 22 pages, 5 figures; version to appear in CQG | Class.Quant.Grav.21:4495,2004 | 10.1088/0264-9381/21/18/014 | null | gr-qc hep-th | null | Loop quantum cosmology leads to a difference equation for the wave function
of a universe, which in general has solutions changing rapidly even when the
volume changes only slightly. For a semiclassical regime such small-scale
oscillations must be suppressed, by choosing the parameters of the solution
appropriately. ... | [
{
"created": "Wed, 26 May 2004 02:44:08 GMT",
"version": "v1"
},
{
"created": "Wed, 25 Aug 2004 13:47:05 GMT",
"version": "v2"
}
] | 2009-03-24 | [
[
"Cartin",
"Daniel",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Bojowald",
"Martin",
""
]
] | Loop quantum cosmology leads to a difference equation for the wave function of a universe, which in general has solutions changing rapidly even when the volume changes only slightly. For a semiclassical regime such small-scale oscillations must be suppressed, by choosing the parameters of the solution appropriately. Fo... |
0905.4832 | Olivier Rabaste | Olivier Rabaste, Eric Chassande-Mottin and Archana Pai | Sparse sky grid for the coherent detection of gravitational wave bursts | 20 pages,8 figures, submitted to CQG | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational wave detectors currently in operation perform the analysis
of their scientific data jointly. Concerning the search for bursting sources,
coherent data analysis methods have been shown to be more efficient. In the
coherent approach, the data collected by the detectors are time-shifted and
linearly co... | [
{
"created": "Fri, 29 May 2009 11:17:40 GMT",
"version": "v1"
}
] | 2009-06-01 | [
[
"Rabaste",
"Olivier",
""
],
[
"Chassande-Mottin",
"Eric",
""
],
[
"Pai",
"Archana",
""
]
] | The gravitational wave detectors currently in operation perform the analysis of their scientific data jointly. Concerning the search for bursting sources, coherent data analysis methods have been shown to be more efficient. In the coherent approach, the data collected by the detectors are time-shifted and linearly comb... |
1411.2030 | Lucien Heurtier | Harold Erbin and Lucien Heurtier | Five-dimensional Janis-Newman algorithm | 27 pages | Class.Quant.Grav. 32 (2015) 16, 165004 | 10.1088/0264-9381/32/16/165004 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Janis-Newman algorithm has been shown to be successful in finding new
sta- tionary solutions of four-dimensional gravity. Attempts for a
generalization to higher dimensions have already been found for the restricted
cases with only one angular mo- mentum. In this paper we propose an extension
of this algorithm to... | [
{
"created": "Fri, 7 Nov 2014 21:00:04 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Oct 2015 18:14:52 GMT",
"version": "v2"
}
] | 2015-10-28 | [
[
"Erbin",
"Harold",
""
],
[
"Heurtier",
"Lucien",
""
]
] | The Janis-Newman algorithm has been shown to be successful in finding new sta- tionary solutions of four-dimensional gravity. Attempts for a generalization to higher dimensions have already been found for the restricted cases with only one angular mo- mentum. In this paper we propose an extension of this algorithm to f... |
1507.03420 | Nematollah Riazi | Nematollah Riazi, S. Sedigheh Hashemi, S. Naseh Sajadi and S. Shahrokh
Assyaee | Exact Anisotropic Solutions of the Generalized TOV Equation | 14 pages, 9 figures | null | 10.1139/cjp-2016-0365 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore gravitating relativistic spheres composed of an anisotropic,
barotropic uid. We assume a bi-polytropic equation of state which has a linear
and a power-law terms. The generalized Tolman-Oppenheimer-Volkoff (TOV)
equation which describes the hydrostatic equilibrium is obtained. The full
system of equations ... | [
{
"created": "Mon, 13 Jul 2015 12:25:23 GMT",
"version": "v1"
}
] | 2016-11-03 | [
[
"Riazi",
"Nematollah",
""
],
[
"Hashemi",
"S. Sedigheh",
""
],
[
"Sajadi",
"S. Naseh",
""
],
[
"Assyaee",
"S. Shahrokh",
""
]
] | We explore gravitating relativistic spheres composed of an anisotropic, barotropic uid. We assume a bi-polytropic equation of state which has a linear and a power-law terms. The generalized Tolman-Oppenheimer-Volkoff (TOV) equation which describes the hydrostatic equilibrium is obtained. The full system of equations ar... |
gr-qc/0303073 | Martin Bojowald | Martin Bojowald | Homogeneous Loop Quantum Cosmology | 25 pages, 3 figures | Class.Quant.Grav.20:2595-2615,2003 | 10.1088/0264-9381/20/13/310 | CGPG-03/3-5 | gr-qc hep-th | null | Loop quantum cosmological methods are extended to homogeneous models in
diagonalized form. It is shown that the diagonalization leads to a
simplification of the volume operator such that its spectrum can be determined
explicitly. This allows the calculation of composite operators, most
importantly the Hamiltonian con... | [
{
"created": "Wed, 19 Mar 2003 18:44:54 GMT",
"version": "v1"
}
] | 2011-05-05 | [
[
"Bojowald",
"Martin",
""
]
] | Loop quantum cosmological methods are extended to homogeneous models in diagonalized form. It is shown that the diagonalization leads to a simplification of the volume operator such that its spectrum can be determined explicitly. This allows the calculation of composite operators, most importantly the Hamiltonian const... |
gr-qc/0005131 | Luis J. Garay | L. J. Garay, J. R. Anglin, J. I. Cirac, and P. Zoller | Sonic black holes in dilute Bose-Einstein condensates | RevTeX, 14 pages, 5 figures | Phys.Rev.A63:023611,2001 | 10.1103/PhysRevA.63.023611 | null | gr-qc cond-mat | null | The sonic analog of a gravitational black hole in dilute-gas Bose-Einstein
condensates is investigated. It is shown that there exist both dynamically
stable and unstable configurations which, in the hydrodynamic limit, exhibit a
behavior completely analogous to that of gravitational black holes. The
dynamical instabi... | [
{
"created": "Wed, 31 May 2000 09:12:40 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Jan 2001 15:15:43 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Garay",
"L. J.",
""
],
[
"Anglin",
"J. R.",
""
],
[
"Cirac",
"J. I.",
""
],
[
"Zoller",
"P.",
""
]
] | The sonic analog of a gravitational black hole in dilute-gas Bose-Einstein condensates is investigated. It is shown that there exist both dynamically stable and unstable configurations which, in the hydrodynamic limit, exhibit a behavior completely analogous to that of gravitational black holes. The dynamical instabili... |
1502.05042 | Gary Gibbons | Shouxin Chen, Gary W. Gibbons, and Yisong Yang | Explicit Integration of Friedmann's Equation with Nonlinear Equations of
State | 43 pages no figures | null | 10.1088/1475-7516/2015/05/020 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is a continuation of our earlier study on the integrability of the
Friedmann equations in the light of the Chebyshev theorem. Our main focus will
be on a series of important, yet not previously touched, problems when the
equation of state for the perfect-fluid universe is nonlinear. These include
the gener... | [
{
"created": "Tue, 17 Feb 2015 18:10:09 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Mar 2015 10:00:32 GMT",
"version": "v2"
}
] | 2015-05-27 | [
[
"Chen",
"Shouxin",
""
],
[
"Gibbons",
"Gary W.",
""
],
[
"Yang",
"Yisong",
""
]
] | This paper is a continuation of our earlier study on the integrability of the Friedmann equations in the light of the Chebyshev theorem. Our main focus will be on a series of important, yet not previously touched, problems when the equation of state for the perfect-fluid universe is nonlinear. These include the general... |
0709.1928 | Jose Navarro | Jose Navarro, Juan B. Sancho | On the naturalness of Einstein's equation | 12 pages, added references, corrected typos | J Geom. Phys. 58, 8 (2008) 1007-1014 | 10.1016/j.geomphys.2008.03.007 | null | gr-qc math.DG | null | We compute all 2-covariant tensors naturally constructed from a
semiriemannian metric which are divergence-free and have weight greater than
-2.
As a consequence, it follows a characterization of the Einstein tensor as the
only, up to a constant factor, 2-covariant tensor naturally constructed from a
semiriemannian... | [
{
"created": "Wed, 12 Sep 2007 16:33:26 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Oct 2007 09:39:41 GMT",
"version": "v2"
}
] | 2009-05-27 | [
[
"Navarro",
"Jose",
""
],
[
"Sancho",
"Juan B.",
""
]
] | We compute all 2-covariant tensors naturally constructed from a semiriemannian metric which are divergence-free and have weight greater than -2. As a consequence, it follows a characterization of the Einstein tensor as the only, up to a constant factor, 2-covariant tensor naturally constructed from a semiriemannian met... |
1906.06161 | Pac\^ome Delva Dr. | P. Delva, N. Puchades, E. Sch\"onemann, F. Dilssner, C. Courde, S.
Bertone, F. Gonzalez, A. Hees, Ch. Le Poncin-Lafitte, F. Meynadier, R.
Prieto-Cerdeira, B. Sohet, J. Ventura-Traveset, P. Wolf | Testing the gravitational redshift with Galileo satellites | 8 pages, proceedings of the "Rencontres de Moriond - Gravitation",
23-30 March 2019, La Thuile, Italy | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the results of the analysis of the GREAT (Galileo gravitational
Redshift test with Eccentric sATellites) experiment from SYRTE (Observatoire de
Paris), funded by the European Space Agency. An elliptic orbit induces a
periodic modulation of the fractional frequency difference between a ground
clock and the ... | [
{
"created": "Fri, 14 Jun 2019 12:27:51 GMT",
"version": "v1"
}
] | 2019-06-17 | [
[
"Delva",
"P.",
""
],
[
"Puchades",
"N.",
""
],
[
"Schönemann",
"E.",
""
],
[
"Dilssner",
"F.",
""
],
[
"Courde",
"C.",
""
],
[
"Bertone",
"S.",
""
],
[
"Gonzalez",
"F.",
""
],
[
"Hees",
"A.",
... | We present the results of the analysis of the GREAT (Galileo gravitational Redshift test with Eccentric sATellites) experiment from SYRTE (Observatoire de Paris), funded by the European Space Agency. An elliptic orbit induces a periodic modulation of the fractional frequency difference between a ground clock and the sa... |
2408.06896 | Yurii Ignat'ev | Yu. G. Ignat'ev | Evolution of plane perturbations in the cosmological environment of the
Higgs scalar field and an ideal scalar charged fluid | 26 pages, 24 figures, 26 references | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A phenomenological model of an ideal fluid with a scalar charge is
formulated, on the basis of which a model with a neutral fluid and a
vacuum-field model with rules of transition between them are constructed. A
qualitative analysis of the obtained dynamic systems is carried out and
numerical cosmological models base... | [
{
"created": "Tue, 13 Aug 2024 13:44:09 GMT",
"version": "v1"
}
] | 2024-08-14 | [
[
"Ignat'ev",
"Yu. G.",
""
]
] | A phenomenological model of an ideal fluid with a scalar charge is formulated, on the basis of which a model with a neutral fluid and a vacuum-field model with rules of transition between them are constructed. A qualitative analysis of the obtained dynamic systems is carried out and numerical cosmological models based ... |
1607.08427 | Donato Bini | Donato Bini, Andrea Geralico, Robert T. Jantzen | Gyroscope precession along bound equatorial plane orbits around a Kerr
black hole | 16 pages; revtex macros; 3 eps figures | Phys. Rev. D 94, 064066 (2016) | 10.1103/PhysRevD.94.064066 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The precession of a test gyroscope along stable bound equatorial plane orbits
around a Kerr black hole is analyzed and the precession angular velocity of the
gyro's parallel transported spin vector and the increment in precession angle
after one orbital period is evaluated. The parallel transported Marck frame
which ... | [
{
"created": "Thu, 28 Jul 2016 12:33:11 GMT",
"version": "v1"
}
] | 2016-09-28 | [
[
"Bini",
"Donato",
""
],
[
"Geralico",
"Andrea",
""
],
[
"Jantzen",
"Robert T.",
""
]
] | The precession of a test gyroscope along stable bound equatorial plane orbits around a Kerr black hole is analyzed and the precession angular velocity of the gyro's parallel transported spin vector and the increment in precession angle after one orbital period is evaluated. The parallel transported Marck frame which en... |
2305.00277 | Vikash Kumar Ojha | V K Ojha, Adithya A Rao, S D Pathak | Interacting tachyonic scalar field II | 19 pages, 5 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The existence of dark energy is essential to explain the cosmic accelerated
expansion. We consider a homogenous interacting tachyonic scalar field as a
possible candidate for the dynamical dark energy. The interaction between the
tachyonic field and matter can be gauged to be linear in the energy density of
matter (o... | [
{
"created": "Sat, 29 Apr 2023 15:26:56 GMT",
"version": "v1"
}
] | 2023-05-02 | [
[
"Ojha",
"V K",
""
],
[
"Rao",
"Adithya A",
""
],
[
"Pathak",
"S D",
""
]
] | The existence of dark energy is essential to explain the cosmic accelerated expansion. We consider a homogenous interacting tachyonic scalar field as a possible candidate for the dynamical dark energy. The interaction between the tachyonic field and matter can be gauged to be linear in the energy density of matter (or ... |
2305.00074 | Shao-Jiang Wang | Rong-Gen Cai, Shao-Jiang Wang, Zi-Yan Yuwen | Hydrodynamic sound shell model | v1, 5 pages (3 figures) + 1 appendix (5 figures); v2, to match the
published version in Physical Review D as a Letter | Phys. Rev. D 108 (2023) L021502 | 10.1103/PhysRevD.108.L021502 | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For a cosmological first-order phase transition in the early Universe, the
associated stochastic gravitational wave background is usually dominated by
sound waves from plasma fluid motions, which have been analytically modeled as
a random superposition of freely propagating sound shells but with the force by
the scal... | [
{
"created": "Fri, 28 Apr 2023 19:59:25 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Jul 2023 14:51:53 GMT",
"version": "v2"
}
] | 2023-07-18 | [
[
"Cai",
"Rong-Gen",
""
],
[
"Wang",
"Shao-Jiang",
""
],
[
"Yuwen",
"Zi-Yan",
""
]
] | For a cosmological first-order phase transition in the early Universe, the associated stochastic gravitational wave background is usually dominated by sound waves from plasma fluid motions, which have been analytically modeled as a random superposition of freely propagating sound shells but with the force by the scalar... |
gr-qc/0701020 | Remo Garattini | Remo Garattini, Francisco S. N. Lobo | Self sustained phantom wormholes in semi-classical gravity | Uses RevTeX 4. 10 pages. V2: clarifying comments and references added | Class.Quant.Grav.24:2401-2413,2007 | 10.1088/0264-9381/24/9/016 | null | gr-qc astro-ph hep-th | null | A possible candidate for the late time accelerated expanding Universe is
phantom energy, which possesses rather bizarre properties, such as the
prediction of a Big Rip singularity and the violation of the null energy
condition. The latter is a fundamental ingredient of traversable wormholes, and
it has been shown tha... | [
{
"created": "Tue, 2 Jan 2007 16:57:51 GMT",
"version": "v1"
},
{
"created": "Thu, 28 Jun 2007 15:02:25 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Garattini",
"Remo",
""
],
[
"Lobo",
"Francisco S. N.",
""
]
] | A possible candidate for the late time accelerated expanding Universe is phantom energy, which possesses rather bizarre properties, such as the prediction of a Big Rip singularity and the violation of the null energy condition. The latter is a fundamental ingredient of traversable wormholes, and it has been shown that ... |
gr-qc/0108026 | Bernhard Haisch | Alfonso Rueda, Bernard Haisch and Roh Tung | Gravity and the Quantum Vacuum Inertia Hypothesis. I. Formalized
Groundwork for Extension to Gravity | 12 pages, no figures | null | null | null | gr-qc | null | It has been shown [1,2] that the electromagnetic quantum vacuum makes a
contribution to the inertial mass, $m_i$, in the sense that at least part of
the inertial force of opposition to acceleration, or inertia reaction force,
springs from the electromagnetic quantum vacuum. As experienced in a Rindler
constant accele... | [
{
"created": "Thu, 9 Aug 2001 18:25:35 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Rueda",
"Alfonso",
""
],
[
"Haisch",
"Bernard",
""
],
[
"Tung",
"Roh",
""
]
] | It has been shown [1,2] that the electromagnetic quantum vacuum makes a contribution to the inertial mass, $m_i$, in the sense that at least part of the inertial force of opposition to acceleration, or inertia reaction force, springs from the electromagnetic quantum vacuum. As experienced in a Rindler constant accelera... |
2303.07262 | Antoine Rignon-Bret | Antoine Rignon-Bret | Second law from the Noether current on null hypersurfaces | Accepted in Phys.Rev.D. Clarifications added, some parts have been
cleaned up | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | I study the balance law equation of surface charges in the presence of
background fields. The construction allows a unified description of Noether's
theorem for both global and local symmetries. From the balance law associated
with some of these symmetries, I will discuss generalizations of Wald's Noether
entropy for... | [
{
"created": "Mon, 13 Mar 2023 16:42:26 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Apr 2023 18:11:55 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Apr 2023 09:01:53 GMT",
"version": "v3"
},
{
"created": "Sat, 12 Aug 2023 15:43:18 GMT",
"version": "v4"
},
{
"c... | 2023-09-06 | [
[
"Rignon-Bret",
"Antoine",
""
]
] | I study the balance law equation of surface charges in the presence of background fields. The construction allows a unified description of Noether's theorem for both global and local symmetries. From the balance law associated with some of these symmetries, I will discuss generalizations of Wald's Noether entropy formu... |
1502.02340 | Liancheng Wang | Liancheng Wang, Feng He and Xiangyun Fu | BSW process of the slowly evaporating charged black hole | 9 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the BSW process of the slowly evaporating charged
black hole. It can be found that the BSW process will also arise near black
hole horizon when the evaporation of charged black hole is very slow. But now
the background black hole does not have to be an extremal black hole, and it
will be appro... | [
{
"created": "Mon, 9 Feb 2015 02:58:50 GMT",
"version": "v1"
}
] | 2015-02-10 | [
[
"Wang",
"Liancheng",
""
],
[
"He",
"Feng",
""
],
[
"Fu",
"Xiangyun",
""
]
] | In this paper, we study the BSW process of the slowly evaporating charged black hole. It can be found that the BSW process will also arise near black hole horizon when the evaporation of charged black hole is very slow. But now the background black hole does not have to be an extremal black hole, and it will be approxi... |
1410.8534 | Richard Brito | Emanuele Berti, Richard Brito, Vitor Cardoso | Ultra-high-energy debris from the collisional Penrose process | 5 pages, 7 figures. v2: Unabridged version of the Letter in press in
PRL. This arXiv version contains supplemental material in response to
http://arxiv.org/abs/1501.01984 | Phys. Rev. Lett. 114, 251103 (2015) | 10.1103/PhysRevLett.114.251103 | null | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Soon after the discovery of the Kerr metric, Penrose realized that
superradiance can be exploited to extract energy from black holes. The original
idea (involving the breakup of a single particle) yields only modest energy
gains. A variant of the Penrose process consists of particle collisions in the
ergoregion. The ... | [
{
"created": "Thu, 30 Oct 2014 20:00:12 GMT",
"version": "v1"
},
{
"created": "Mon, 18 May 2015 16:39:38 GMT",
"version": "v2"
}
] | 2015-07-01 | [
[
"Berti",
"Emanuele",
""
],
[
"Brito",
"Richard",
""
],
[
"Cardoso",
"Vitor",
""
]
] | Soon after the discovery of the Kerr metric, Penrose realized that superradiance can be exploited to extract energy from black holes. The original idea (involving the breakup of a single particle) yields only modest energy gains. A variant of the Penrose process consists of particle collisions in the ergoregion. The co... |
gr-qc/0606135 | Janusz Karkowski | Janusz Karkowski | Boosted Kerr black hole | 18 pages, 6 figures | Acta Phys.Polon. B37 (2006) 2571-2586 | null | null | gr-qc | null | Initial data for boosted Kerr black hole are constructed in an axially
symmetric case. Momentum and hamiltonian constraints are solved numerically
using finite element method (FEM) algorithms. Both Bowen-York and puncture
boundary conditions are adopted and appropriate results are compared. Past and
future apparent h... | [
{
"created": "Fri, 30 Jun 2006 16:31:02 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Karkowski",
"Janusz",
""
]
] | Initial data for boosted Kerr black hole are constructed in an axially symmetric case. Momentum and hamiltonian constraints are solved numerically using finite element method (FEM) algorithms. Both Bowen-York and puncture boundary conditions are adopted and appropriate results are compared. Past and future apparent hor... |
1604.06312 | Devin Hansen | Devin Hansen, David Kubiznak, Robert B. Mann | Criticality and Surface Tension in Rotating Horizon Thermodynamics | 10 pages, 4 figures. Appendix added, final version | null | 10.1088/0264-9381/33/16/165005 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a modified horizon thermodynamics and the associated criticality for
rotating black hole spacetimes. Namely, we show that under a virtual
displacement of the black hole horizon accompanied by an independent variation
of the rotation parameter, the radial Einstein equation takes a form of a
"cohomogeneity two... | [
{
"created": "Thu, 21 Apr 2016 14:02:49 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Aug 2016 16:19:38 GMT",
"version": "v2"
}
] | 2016-08-31 | [
[
"Hansen",
"Devin",
""
],
[
"Kubiznak",
"David",
""
],
[
"Mann",
"Robert B.",
""
]
] | We study a modified horizon thermodynamics and the associated criticality for rotating black hole spacetimes. Namely, we show that under a virtual displacement of the black hole horizon accompanied by an independent variation of the rotation parameter, the radial Einstein equation takes a form of a "cohomogeneity two" ... |
gr-qc/9805076 | Michael P. Grady | Michael Grady | Universe as a Phase Boundary in a Four-Dimensional Euclidean Space | 7 pages, Latex, no figures. Many arguments substantially expanded,
new introduction | null | null | SUNY-FRE-98-08 | gr-qc astro-ph hep-th quant-ph | null | It is proposed that space is a four-dimensional Euclidean space with
universal time. Originally this space was filled with a uniform substance,
pictured as a liquid, which at some time became supercooled. Our universe began
as a nucleation event initiating a liquid to solid transition. The universe we
inhabit and are... | [
{
"created": "Wed, 20 May 1998 01:47:31 GMT",
"version": "v1"
},
{
"created": "Mon, 29 Jun 1998 20:06:00 GMT",
"version": "v2"
},
{
"created": "Thu, 19 Nov 1998 16:07:14 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Grady",
"Michael",
""
]
] | It is proposed that space is a four-dimensional Euclidean space with universal time. Originally this space was filled with a uniform substance, pictured as a liquid, which at some time became supercooled. Our universe began as a nucleation event initiating a liquid to solid transition. The universe we inhabit and are d... |
gr-qc/9710118 | Guido Cognola | Guido Cognola | Thermodynamics of scalar fields in Kerr's geometry | 7 pages, LaTex, (revised version-last section modified) | Phys.Rev. D57 (1998) 6292-6296 | 10.1103/PhysRevD.57.6292 | University of Trento, UTF 403 | gr-qc | null | The one-loop contributions to the entropy for a massive scalar field in a
Kerr black hole are investigated using an approximation of the metric, which,
after a conformal transformation, permits to work in a Rindler-like spacetime.
Of course, as for the Schwarzschild case, the entropy is divergent in the
proximity of ... | [
{
"created": "Tue, 28 Oct 1997 09:15:15 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Oct 1997 07:42:29 GMT",
"version": "v2"
},
{
"created": "Thu, 22 Jan 1998 16:38:13 GMT",
"version": "v3"
}
] | 2009-10-30 | [
[
"Cognola",
"Guido",
""
]
] | The one-loop contributions to the entropy for a massive scalar field in a Kerr black hole are investigated using an approximation of the metric, which, after a conformal transformation, permits to work in a Rindler-like spacetime. Of course, as for the Schwarzschild case, the entropy is divergent in the proximity of th... |
1308.3077 | Luis Nunez A | L. Becerra, H. Hernandez, L. A. Nunez | Quasi-static thermal evolution of compact objects | 28 pages, 8 figures. Some typos and misplaced equations corrected.
Quasi-local equation of state re-interpretation assumed and two new
references included | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study under what conditions the thermal peeling is present for dissipative
local and quasi-local anisotropic spherical matter configurations. The thermal
peeling occurs when different signs in the velocity of fluid elements appears,
giving rise to the splitting of the matter configuration. The evolution is
conside... | [
{
"created": "Wed, 14 Aug 2013 10:15:11 GMT",
"version": "v1"
},
{
"created": "Tue, 20 Aug 2013 09:49:53 GMT",
"version": "v2"
},
{
"created": "Sun, 22 Jun 2014 21:55:32 GMT",
"version": "v3"
}
] | 2014-06-24 | [
[
"Becerra",
"L.",
""
],
[
"Hernandez",
"H.",
""
],
[
"Nunez",
"L. A.",
""
]
] | We study under what conditions the thermal peeling is present for dissipative local and quasi-local anisotropic spherical matter configurations. The thermal peeling occurs when different signs in the velocity of fluid elements appears, giving rise to the splitting of the matter configuration. The evolution is considere... |
1412.4665 | Michael Coughlin | Michael Coughlin, Patrick Meyers, Eric Thrane, Jialun Luo, Nelson
Christensen | The detectability of eccentric compact binary coalescences with advanced
gravitational-wave detectors | null | null | 10.1103/PhysRevD.91.063004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Compact binary coalescences are a promising source of gravitational waves for
second-generation interferometric gravitational-wave detectors such as advanced
LIGO and advanced Virgo. While most binaries are expected to possess circular
orbits, some may be eccentric, for example, if they are formed through
dynamical c... | [
{
"created": "Mon, 15 Dec 2014 16:38:38 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Dec 2014 14:33:56 GMT",
"version": "v2"
},
{
"created": "Wed, 17 Dec 2014 13:57:43 GMT",
"version": "v3"
},
{
"created": "Thu, 18 Dec 2014 02:45:05 GMT",
"version": "v4"
},
{
"c... | 2015-06-23 | [
[
"Coughlin",
"Michael",
""
],
[
"Meyers",
"Patrick",
""
],
[
"Thrane",
"Eric",
""
],
[
"Luo",
"Jialun",
""
],
[
"Christensen",
"Nelson",
""
]
] | Compact binary coalescences are a promising source of gravitational waves for second-generation interferometric gravitational-wave detectors such as advanced LIGO and advanced Virgo. While most binaries are expected to possess circular orbits, some may be eccentric, for example, if they are formed through dynamical cap... |
2011.03973 | Masataka Tsuchiya | Masataka Tsuchiya, Tsuyoshi Houri, Chul-Moon Yoo | The First Order Symmetry Operator on Gravitational Perturbations in the
5-dimensional Myers-Perry Spacetime with Equal Angular Momenta | 37 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has been revealed that the first order symmetry operator for the
linearized Einstein equation on a vacuum spacetime can be constructed from a
Killing-Yano 3-form. This might be used to construct all or part of solutions
to the field equation. In this paper, we perform a mode decomposition of a
metric perturbation ... | [
{
"created": "Sun, 8 Nov 2020 12:53:53 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Feb 2021 08:41:14 GMT",
"version": "v2"
}
] | 2021-02-03 | [
[
"Tsuchiya",
"Masataka",
""
],
[
"Houri",
"Tsuyoshi",
""
],
[
"Yoo",
"Chul-Moon",
""
]
] | It has been revealed that the first order symmetry operator for the linearized Einstein equation on a vacuum spacetime can be constructed from a Killing-Yano 3-form. This might be used to construct all or part of solutions to the field equation. In this paper, we perform a mode decomposition of a metric perturbation on... |
1011.5628 | Eugenio Bianchi | Eugenio Bianchi | Black Hole Entropy, Loop Gravity, and Polymer Physics | 13 pages, 2 figures | Class.Quant.Grav.28:114006,2011 | 10.1088/0264-9381/28/11/114006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Loop Gravity provides a microscopic derivation of Black Hole entropy. In this
paper, I show that the microstates counted admit a semiclassical description in
terms of shapes of a tessellated horizon. The counting of microstates and the
computation of the entropy can be done via a mapping to an equivalent
statistical ... | [
{
"created": "Thu, 25 Nov 2010 13:53:14 GMT",
"version": "v1"
}
] | 2011-07-28 | [
[
"Bianchi",
"Eugenio",
""
]
] | Loop Gravity provides a microscopic derivation of Black Hole entropy. In this paper, I show that the microstates counted admit a semiclassical description in terms of shapes of a tessellated horizon. The counting of microstates and the computation of the entropy can be done via a mapping to an equivalent statistical me... |
1905.09502 | Alexander Zhuk | Maxim Eingorn, A. Emrah Yukselci and Alexander Zhuk | Effect of the spatial curvature of the Universe on the form of the
gravitational potential | v2 (matching the publication in European Physical Journal C) = v1 +
minor changes + new Refs.; 8 pages, 3 figures | Eur. Phys. J. C 79, 655 (2019) | 10.1140/epjc/s10052-019-7169-6 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within the cosmic screening approach, we obtain the exact formulas for the
velocity-independent gravitational potentials produced by matter in the form of
discrete sources distributed in the open and closed Universes. These formulas
demonstrate that spatial curvature of the Universe considerably affect the form
of th... | [
{
"created": "Thu, 23 May 2019 07:12:52 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Jul 2019 19:16:52 GMT",
"version": "v2"
}
] | 2019-08-13 | [
[
"Eingorn",
"Maxim",
""
],
[
"Yukselci",
"A. Emrah",
""
],
[
"Zhuk",
"Alexander",
""
]
] | Within the cosmic screening approach, we obtain the exact formulas for the velocity-independent gravitational potentials produced by matter in the form of discrete sources distributed in the open and closed Universes. These formulas demonstrate that spatial curvature of the Universe considerably affect the form of the ... |
1806.06453 | Ali \"Ovg\"un Dr. | Ali \"Ovg\"un, \.Izzet Sakall{\i} and Joel Saavedra | Weak gravitational lensing by Kerr-MOG Black Hole and Gauss-Bonnet
theorem | 9 pages, 3 Figures. Accepted for publication in Annals of Physics | Annals of Physics 411 (2019) 167978 | 10.1016/j.aop.2019.167978 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The deflection angle of Kerr-MOG black holes is studied for different values
of the parameter in modified gravity (MOG). To this end, we employ the
Gauss-Bonnet theorem, which was first studied by Gibbons and Werner and then
extended by Ono, Ishihara and Asada, who use a generalized optical metric where
the deflectio... | [
{
"created": "Sun, 17 Jun 2018 21:48:13 GMT",
"version": "v1"
},
{
"created": "Sun, 4 Aug 2019 07:46:43 GMT",
"version": "v2"
}
] | 2019-10-29 | [
[
"Övgün",
"Ali",
""
],
[
"Sakallı",
"İzzet",
""
],
[
"Saavedra",
"Joel",
""
]
] | The deflection angle of Kerr-MOG black holes is studied for different values of the parameter in modified gravity (MOG). To this end, we employ the Gauss-Bonnet theorem, which was first studied by Gibbons and Werner and then extended by Ono, Ishihara and Asada, who use a generalized optical metric where the deflection ... |
gr-qc/0410023 | Reinhard Prix | Reinhard Prix, Jerome Novak, G.L. Comer | Relativistic numerical models for stationary superfluid Neutron Stars | 18 pages, 9 figures, RevTex4; to appear in Phys.Rev.D; v2: improved
figures, more discussion of physical results | Phys.Rev. D71 (2005) 043005 | 10.1103/PhysRevD.71.043005 | null | gr-qc astro-ph | null | We have developed a theoretical model and a numerical code for stationary
rotating superfluid neutron stars in full general relativity. The underlying
two-fluid model is based on Carter's covariant multi-fluid hydrodynamic
formalism. The two fluids, representing the superfluid neutrons on one hand,
and the protons an... | [
{
"created": "Tue, 5 Oct 2004 21:49:57 GMT",
"version": "v1"
},
{
"created": "Sun, 6 Feb 2005 09:40:04 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Prix",
"Reinhard",
""
],
[
"Novak",
"Jerome",
""
],
[
"Comer",
"G. L.",
""
]
] | We have developed a theoretical model and a numerical code for stationary rotating superfluid neutron stars in full general relativity. The underlying two-fluid model is based on Carter's covariant multi-fluid hydrodynamic formalism. The two fluids, representing the superfluid neutrons on one hand, and the protons and ... |
2305.19062 | Saddam Hussain | Saddam Hussain, Anirban Chatterjee, Kaushik Bhattacharya | Dynamical stability in models where dark matter and dark energy are
non-minimally coupled to curvature | 26 pages, 12 figures, 7 tables; Accepted for the publication in
Physical Review D | PhysRevD. 108 (2023) 103502 | 10.1103/PhysRevD.108.103502 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | This work explores the dynamical stability of cosmological models where dark
matter and dark energy can non-minimally couple to spacetime (scalar)
curvature. Two different scenarios are presented here. In the initial case,
only dark matter sector is coupled to curvature in the presence of a
quintessence scalar field.... | [
{
"created": "Tue, 30 May 2023 14:25:46 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Oct 2023 20:19:54 GMT",
"version": "v2"
}
] | 2023-11-07 | [
[
"Hussain",
"Saddam",
""
],
[
"Chatterjee",
"Anirban",
""
],
[
"Bhattacharya",
"Kaushik",
""
]
] | This work explores the dynamical stability of cosmological models where dark matter and dark energy can non-minimally couple to spacetime (scalar) curvature. Two different scenarios are presented here. In the initial case, only dark matter sector is coupled to curvature in the presence of a quintessence scalar field. I... |
0806.1591 | Sascha Husa | Stanislav Babak, Mark Hannam, Sascha Husa, Bernard Schutz | Resolving Super Massive Black Holes with LISA | 4 pages, 1 figure | null | null | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the angular resolution of the gravitational wave detector LISA and
show that numerical relativity can drastically improve the accuracy of position
location for coalescing Super Massive Black Hole (SMBH) binaries. For systems
with total redshifted mass above $10^7 M_{\odot}$, LISA will mainly see the
merger a... | [
{
"created": "Tue, 10 Jun 2008 15:47:58 GMT",
"version": "v1"
}
] | 2008-06-15 | [
[
"Babak",
"Stanislav",
""
],
[
"Hannam",
"Mark",
""
],
[
"Husa",
"Sascha",
""
],
[
"Schutz",
"Bernard",
""
]
] | We study the angular resolution of the gravitational wave detector LISA and show that numerical relativity can drastically improve the accuracy of position location for coalescing Super Massive Black Hole (SMBH) binaries. For systems with total redshifted mass above $10^7 M_{\odot}$, LISA will mainly see the merger and... |
1202.1793 | Wytler Cordeiro dos Santos | Wytler Cordeiro dos Santos | The presence of Primordial Gravitational Waves in the Cosmic Microwave
Background | 7 pages, 1 figure | null | null | null | gr-qc astro-ph.CO astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The General Relativity affirms that any field is a source of gravitational
field, thus one should affirm that the energy of Cosmic Microwave Background
(CMB) generated primordial gravitational waves. The present article shows that
a gravitational wave with dimensionless amplitude $\sim 10^{-5}$ and large wave
length ... | [
{
"created": "Wed, 8 Feb 2012 18:42:52 GMT",
"version": "v1"
},
{
"created": "Sun, 13 May 2012 00:04:02 GMT",
"version": "v2"
}
] | 2012-05-15 | [
[
"Santos",
"Wytler Cordeiro dos",
""
]
] | The General Relativity affirms that any field is a source of gravitational field, thus one should affirm that the energy of Cosmic Microwave Background (CMB) generated primordial gravitational waves. The present article shows that a gravitational wave with dimensionless amplitude $\sim 10^{-5}$ and large wave length $\... |
2205.09272 | PanPan Wang | Yu Hu, Pan-Pan Wang, Yu-Jie Tan, and Cheng-Gang Shao | Full analytic expression of overlap reduction function for gravitational
wave background with pulsar timing arrays | null | null | 10.1103/PhysRevD.106.024005 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Pulsar timing array (PTA) is expected to detect gravitational wave background
(GWB) in the nanohertz band within the next decade. This provides an
opportunity to test the gravity theory and cosmology. A typical data analysis
method to detect GWB is cross-correlation analysis. The overlap reduction
function (ORF) play... | [
{
"created": "Thu, 19 May 2022 01:21:56 GMT",
"version": "v1"
}
] | 2022-07-20 | [
[
"Hu",
"Yu",
""
],
[
"Wang",
"Pan-Pan",
""
],
[
"Tan",
"Yu-Jie",
""
],
[
"Shao",
"Cheng-Gang",
""
]
] | Pulsar timing array (PTA) is expected to detect gravitational wave background (GWB) in the nanohertz band within the next decade. This provides an opportunity to test the gravity theory and cosmology. A typical data analysis method to detect GWB is cross-correlation analysis. The overlap reduction function (ORF) plays ... |
1704.06290 | Pablo Guilleminot | Pablo Guilleminot, Rodrigo Olea and Alexander N. Petrov | Constant curvature black holes in Einstein AdS gravity: conserved
quantities | 20 pages, no figures | null | 10.1103/PhysRevD.95.124039 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study physical properties of constant curvature black holes (CCBHs) in
Einstein anti-de Sitter (AdS) gravity. These objects, which are locally AdS
throughout the space, are constructed from identifications of global AdS
spacetime, in a similar fashion as Banados-Teitelboim-Zanelli (BTZ) black hole
in three dimensi... | [
{
"created": "Thu, 20 Apr 2017 18:20:35 GMT",
"version": "v1"
}
] | 2017-08-02 | [
[
"Guilleminot",
"Pablo",
""
],
[
"Olea",
"Rodrigo",
""
],
[
"Petrov",
"Alexander N.",
""
]
] | We study physical properties of constant curvature black holes (CCBHs) in Einstein anti-de Sitter (AdS) gravity. These objects, which are locally AdS throughout the space, are constructed from identifications of global AdS spacetime, in a similar fashion as Banados-Teitelboim-Zanelli (BTZ) black hole in three dimension... |
2003.00590 | Ivan Kolar | Ivan Kolar, Anupam Mazumdar | Hamiltonian for scalar field model of infinite derivative gravity | 13 pages | Phys. Rev. D 101, 124028 (2020) | 10.1103/PhysRevD.101.124028 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Theories with an infinite number of derivatives are described by non-local
Lagrangians for which the standard Hamiltonian formalism cannot be applied.
Hamiltonians of special types of non-local theories can be constructed by means
of the (1+1)-dimensional Hamiltonian formalism. In this paper, we consider a
simple sca... | [
{
"created": "Sun, 1 Mar 2020 21:25:36 GMT",
"version": "v1"
}
] | 2020-06-16 | [
[
"Kolar",
"Ivan",
""
],
[
"Mazumdar",
"Anupam",
""
]
] | Theories with an infinite number of derivatives are described by non-local Lagrangians for which the standard Hamiltonian formalism cannot be applied. Hamiltonians of special types of non-local theories can be constructed by means of the (1+1)-dimensional Hamiltonian formalism. In this paper, we consider a simple scala... |
0705.1080 | Chiang-Mei Chen | Chiang-Mei Chen, Jian-Liang Liu, James M. Nester | Quasi-local energy for cosmological models | Contributed to International Symposium on Cosmology and Particle
Astrophysics (CosPA 2006), Taipei, Taiwan, 15-17 Nov 2006 | Mod.Phys.Lett.A22:2039-2046,2007 | 10.1142/S0217732307025285 | null | gr-qc | null | First we briefly review our covariant Hamiltonian approach to quasi-local
energy, noting that the Hamiltonian-boundary-term quasi-local energy
expressions depend on the chosen boundary conditions and reference
configuration. Then we present the quasi-local energy values resulting from the
formalism applied to homogen... | [
{
"created": "Tue, 8 May 2007 12:42:33 GMT",
"version": "v1"
},
{
"created": "Tue, 15 May 2007 23:46:19 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Chen",
"Chiang-Mei",
""
],
[
"Liu",
"Jian-Liang",
""
],
[
"Nester",
"James M.",
""
]
] | First we briefly review our covariant Hamiltonian approach to quasi-local energy, noting that the Hamiltonian-boundary-term quasi-local energy expressions depend on the chosen boundary conditions and reference configuration. Then we present the quasi-local energy values resulting from the formalism applied to homogeneo... |
2004.00888 | Lavinia Heisenberg | Fabio D'Ambrosio, Mudit Garg, Lavinia Heisenberg | Non-linear extension of non-metricity scalar for MOND | 6 pages | null | 10.1016/j.physletb.2020.135970 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General Relativity enjoys the freedom of different geometrical
interpretations in terms of curvature, torsion or non-metricity. Within this
geometrical trinity, a simpler geometrical formulation of General Relativity
manifests itself in the latter, where gravity is entirely attributed to
non-metricity. In this Letter... | [
{
"created": "Thu, 2 Apr 2020 09:09:43 GMT",
"version": "v1"
}
] | 2020-12-30 | [
[
"D'Ambrosio",
"Fabio",
""
],
[
"Garg",
"Mudit",
""
],
[
"Heisenberg",
"Lavinia",
""
]
] | General Relativity enjoys the freedom of different geometrical interpretations in terms of curvature, torsion or non-metricity. Within this geometrical trinity, a simpler geometrical formulation of General Relativity manifests itself in the latter, where gravity is entirely attributed to non-metricity. In this Letter, ... |
gr-qc/0303088 | Marije Ljolje | Marije Ljolje | On the Lorentz Invariant Gravitation Field Theory | 10 pages, 49 equations | null | null | null | gr-qc | null | The theory of gravitation field within the special theory of relativity is
analyzed.
| [
{
"created": "Sun, 23 Mar 2003 12:13:50 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ljolje",
"Marije",
""
]
] | The theory of gravitation field within the special theory of relativity is analyzed. |
1809.01401 | Vaibhav Tiwari | Vaibhav Tiwari, Stephen Fairhurst and Mark Hannam | Constraining black-hole spins with gravitational wave observations | null | null | 10.3847/1538-4357/aae8df | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The observation of gravitational-wave signals from merging black-hole
binaries enables direct measurement of the properties of the black holes. An
individual observation allows measurement of the black-hole masses, but only
limited information about either the magnitude or orientation of the black hole
spins is avail... | [
{
"created": "Wed, 5 Sep 2018 09:30:25 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Oct 2018 12:37:48 GMT",
"version": "v2"
}
] | 2018-12-12 | [
[
"Tiwari",
"Vaibhav",
""
],
[
"Fairhurst",
"Stephen",
""
],
[
"Hannam",
"Mark",
""
]
] | The observation of gravitational-wave signals from merging black-hole binaries enables direct measurement of the properties of the black holes. An individual observation allows measurement of the black-hole masses, but only limited information about either the magnitude or orientation of the black hole spins is availab... |
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