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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1711.09503 | Wytler Cordeiro dos Santos | Wytler Cordeiro dos Santos | Non-coordinates basis in General Relativity and Cartan's structure
equations | 38 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The basic and fundamental aspects of General Relativity are in general
analysed in mathematical level of coordinate basis or holonomic frame by
several authors in the literature. However, for many purposes it is more
convenient to use a general basis, often called in four dimensions, a tetrad or
vierbein, very useful... | [
{
"created": "Mon, 27 Nov 2017 01:48:20 GMT",
"version": "v1"
}
] | 2017-11-28 | [
[
"Santos",
"Wytler Cordeiro dos",
""
]
] | The basic and fundamental aspects of General Relativity are in general analysed in mathematical level of coordinate basis or holonomic frame by several authors in the literature. However, for many purposes it is more convenient to use a general basis, often called in four dimensions, a tetrad or vierbein, very useful i... |
1806.04257 | Vladim\'ir Balek | Vladim\'ir Balek and Orchidea Maria Lecian | Constraints on modified dispersion relations | 13 pages, 6 figures | APUC -- special number dedicated to prof. Presnajder's 70th
anniversary, LIV (2019) 81 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Deviation from standard dispersion relations for electrons and photons in the
form of an extra term proportional to an arbitrarily high power of momentum is
studied. It is shown that observational constraints lead to a region in the
parametric space that is similar in shape to the region obtained earlier in a
theory ... | [
{
"created": "Mon, 11 Jun 2018 22:22:51 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jun 2018 16:48:51 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Jun 2018 17:28:53 GMT",
"version": "v3"
},
{
"created": "Fri, 13 Dec 2019 12:35:41 GMT",
"version": "v4"
}
] | 2019-12-16 | [
[
"Balek",
"Vladimír",
""
],
[
"Lecian",
"Orchidea Maria",
""
]
] | Deviation from standard dispersion relations for electrons and photons in the form of an extra term proportional to an arbitrarily high power of momentum is studied. It is shown that observational constraints lead to a region in the parametric space that is similar in shape to the region obtained earlier in a theory in... |
gr-qc/0511003 | Francisco Lobo | Francisco S. N. Lobo | Chaplygin traversable wormholes | 9 pages, 2 figures, Revtex4. V2: Considerable comments and references
added, now 10 pages | Phys.Rev. D73 (2006) 064028 | 10.1103/PhysRevD.73.064028 | null | gr-qc astro-ph hep-th | null | The generalized Chaplygin gas (GCG) is a candidate for the unification of
dark energy and dark matter, and is parametrized by an exotic equation of state
given by $p_{ch}=-A/\rho_{ch}^{\alpha}$, where $A$ is a positive constant and
$0<\alpha \leq 1$. In this paper, exact solutions of spherically symmetric
traversable... | [
{
"created": "Tue, 1 Nov 2005 15:03:16 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Mar 2006 10:50:01 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Lobo",
"Francisco S. N.",
""
]
] | The generalized Chaplygin gas (GCG) is a candidate for the unification of dark energy and dark matter, and is parametrized by an exotic equation of state given by $p_{ch}=-A/\rho_{ch}^{\alpha}$, where $A$ is a positive constant and $0<\alpha \leq 1$. In this paper, exact solutions of spherically symmetric traversable w... |
0710.0115 | Yi-Fu Cai | Taotao Qiu, Yi-Fu Cai, Xin-Min Zhang | Null Energy Condition and Dark Energy Models | 9 pages, 6 figures | Mod.Phys.Lett.A23:2787-2798,2008 | 10.1142/S0217732308026194 | null | gr-qc astro-ph hep-ph hep-th | null | Null Energy Condition (NEC) requires the equation of state (EoS) of the
universe $w_u$ satisfy $w_u\geq-1$, which implies, for instance in a universe
with matter and dark energy dominating
$w_u=w_m\Omega_m+w_{de}\Omega_{de}=w_{de}\Omega_{de}\geq-1$. In this paper we
study constraints on the dark energy models from th... | [
{
"created": "Sun, 30 Sep 2007 08:11:41 GMT",
"version": "v1"
}
] | 2008-10-28 | [
[
"Qiu",
"Taotao",
""
],
[
"Cai",
"Yi-Fu",
""
],
[
"Zhang",
"Xin-Min",
""
]
] | Null Energy Condition (NEC) requires the equation of state (EoS) of the universe $w_u$ satisfy $w_u\geq-1$, which implies, for instance in a universe with matter and dark energy dominating $w_u=w_m\Omega_m+w_{de}\Omega_{de}=w_{de}\Omega_{de}\geq-1$. In this paper we study constraints on the dark energy models from the ... |
1611.03833 | Yoelsy Leyva | Yoelsy Leyva and Mirko Sep\'ulveda | Bulk viscosity, interaction and the viability of phantom solutions | 8 pages, 5 figures | Eur. Phys. J. C (2017) 77: 426 | 10.1140/epjc/s10052-017-4946-y | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the dynamics of a bulk viscosity model in the Eckart approach for a
spatially flat Friedmann-Robertson-Walker (FRW) universe. We have included
radiation and dark energy, assumed as perfect fluids, and dark matter treated
as an imperfect fluid having bulk viscosity. We also introduce an interaction
term betwe... | [
{
"created": "Fri, 11 Nov 2016 19:52:34 GMT",
"version": "v1"
}
] | 2017-07-07 | [
[
"Leyva",
"Yoelsy",
""
],
[
"Sepúlveda",
"Mirko",
""
]
] | We study the dynamics of a bulk viscosity model in the Eckart approach for a spatially flat Friedmann-Robertson-Walker (FRW) universe. We have included radiation and dark energy, assumed as perfect fluids, and dark matter treated as an imperfect fluid having bulk viscosity. We also introduce an interaction term between... |
1809.06275 | Alexander C. Jenkins | Alexander C. Jenkins, Andreas G. A. Pithis, and Mairi Sakellariadou | Can we detect quantum gravity with compact binary inspirals? | 7 pages, 0 figures; version 2 has additional discussion of our
approach and 5 additional references | Phys. Rev. D 98, 104032 (2018) | 10.1103/PhysRevD.98.104032 | KCL-PH-TH/2018-51 | gr-qc astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Treating general relativity as an effective field theory, we compute the
leading-order quantum corrections to the orbits and gravitational-wave emission
of astrophysical compact binaries. These corrections are independent of the
(unknown) nature of quantum gravity at high energies, and generate a phase
shift and ampl... | [
{
"created": "Mon, 17 Sep 2018 15:28:22 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Oct 2018 09:32:58 GMT",
"version": "v2"
}
] | 2018-11-28 | [
[
"Jenkins",
"Alexander C.",
""
],
[
"Pithis",
"Andreas G. A.",
""
],
[
"Sakellariadou",
"Mairi",
""
]
] | Treating general relativity as an effective field theory, we compute the leading-order quantum corrections to the orbits and gravitational-wave emission of astrophysical compact binaries. These corrections are independent of the (unknown) nature of quantum gravity at high energies, and generate a phase shift and amplit... |
2204.13203 | Vyacheslav Vandeev | V.P. Vandeev, A.N. Semenova | Tidal Forces in Kottler Spacetimes | 14 pages, 10 figures | Eur. Phys. J. C 81, 610 (2021) | 10.1140/epjc/s10052-021-09427-8 | null | gr-qc | http://creativecommons.org/publicdomain/zero/1.0/ | The article considers tidal forces in the vicinity of the Kottler black hole.
We find a solution of the geodesic deviation equation for radially falling
bodies, which is determined by elliptic integrals. And also the asymptotic
behavior of all spatial geodesic deviation vector components were found. We
demonstrate th... | [
{
"created": "Wed, 27 Apr 2022 21:26:34 GMT",
"version": "v1"
}
] | 2022-05-03 | [
[
"Vandeev",
"V. P.",
""
],
[
"Semenova",
"A. N.",
""
]
] | The article considers tidal forces in the vicinity of the Kottler black hole. We find a solution of the geodesic deviation equation for radially falling bodies, which is determined by elliptic integrals. And also the asymptotic behavior of all spatial geodesic deviation vector components were found. We demonstrate that... |
gr-qc/0011067 | Piotr Chrusciel | P.T. Chrusciel, J.H.G. Fu, G.J. Galloway and R. Howard | On fine differentiability properties of horizons and applications to
Riemannian geometry | Latex2e, 13 pages in A4 format | J.Geom.Phys. 41 (2002) 1-12 | 10.1016/S0393-0440(01)00044-4 | null | gr-qc | null | We study fine differentiability properties of horizons. We show that the set
of end points of generators of a n-dimensional horizon H (which is included in
a (n+1)-dimensional space-time M) has vanishing n-dimensional Hausdorff
measure. This is proved by showing that the set of end points of generators at
which the h... | [
{
"created": "Mon, 20 Nov 2000 10:27:39 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Chrusciel",
"P. T.",
""
],
[
"Fu",
"J. H. G.",
""
],
[
"Galloway",
"G. J.",
""
],
[
"Howard",
"R.",
""
]
] | We study fine differentiability properties of horizons. We show that the set of end points of generators of a n-dimensional horizon H (which is included in a (n+1)-dimensional space-time M) has vanishing n-dimensional Hausdorff measure. This is proved by showing that the set of end points of generators at which the hor... |
1911.03935 | Che-Yu Chen | Imanol Albarran, Mariam Bouhmadi-L\'opez, Che-Yu Chen, Pisin Chen | Eddington-inspired-Born-Infeld tensorial instabilities neutralized in a
quantum approach | 16 pages | Eur. Phys. J. C (2020) 80: 33 | 10.1140/epjc/s10052-019-7598-2 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The recent direct detection of gravitational waves has highlighted the huge
importance of the tensorial modes in any extended gravitational theory. One of
the most appealing approaches to extend gravity beyond general relativity is
the Eddington-inspired-Born-Infeld gravity which is formulated within the
Palatini app... | [
{
"created": "Sun, 10 Nov 2019 13:54:59 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Jan 2020 14:58:21 GMT",
"version": "v2"
}
] | 2020-01-16 | [
[
"Albarran",
"Imanol",
""
],
[
"Bouhmadi-López",
"Mariam",
""
],
[
"Chen",
"Che-Yu",
""
],
[
"Chen",
"Pisin",
""
]
] | The recent direct detection of gravitational waves has highlighted the huge importance of the tensorial modes in any extended gravitational theory. One of the most appealing approaches to extend gravity beyond general relativity is the Eddington-inspired-Born-Infeld gravity which is formulated within the Palatini appro... |
1106.6231 | Anjan Ananda Sen | Debajyoti Choudhury, Debashis Ghoshal and Anjan Ananda Sen | Standard Cosmology Delayed | 12 pages, 3 figures, Revised with more elaborate discussions.
Accepted for publication in JCAP | null | 10.1088/1475-7516/2012/02/046 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The introduction of a delay in the Friedmann equation of cosmological
evolution is shown to result in the very early universe undergoing the
necessary accelerated expansion in the usual radiation (or matter) dominated
phase. Occurring even without a violation of the strong energy condition, this
expansion slows down ... | [
{
"created": "Thu, 30 Jun 2011 14:03:42 GMT",
"version": "v1"
},
{
"created": "Mon, 6 Feb 2012 06:57:44 GMT",
"version": "v2"
}
] | 2015-05-28 | [
[
"Choudhury",
"Debajyoti",
""
],
[
"Ghoshal",
"Debashis",
""
],
[
"Sen",
"Anjan Ananda",
""
]
] | The introduction of a delay in the Friedmann equation of cosmological evolution is shown to result in the very early universe undergoing the necessary accelerated expansion in the usual radiation (or matter) dominated phase. Occurring even without a violation of the strong energy condition, this expansion slows down na... |
1606.00100 | Dao-Jun Liu | Yang Huang, Dao-Jun Liu and Xin-Zhou Li | Superradiant instability of $D$-dimensional
Reissner-Nordstr\"{o}m-anti-de Sitter black hole mirror system | 16 pages, 8 figures; v2: minor changes made, some references added;
v3: published in Int. J. Mod. Phys. D | Int. J. Mod. Phys. D 26(13), 1750141, 2017 | 10.1142/S0218271817501413 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, a detailed analysis for superradiant stability of the system
composed by a $D$-dimensional Reissner-Nordstr\"{o}m-anti-de Sitter (RN-AdS)
black hole and a reflecting mirror under charged scalar perturbations are
presented in the linear regime. It is found that the stability of the system is
heavily aff... | [
{
"created": "Wed, 1 Jun 2016 02:57:58 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Jun 2016 14:40:49 GMT",
"version": "v2"
},
{
"created": "Fri, 9 Jun 2017 09:08:22 GMT",
"version": "v3"
}
] | 2017-10-25 | [
[
"Huang",
"Yang",
""
],
[
"Liu",
"Dao-Jun",
""
],
[
"Li",
"Xin-Zhou",
""
]
] | In this paper, a detailed analysis for superradiant stability of the system composed by a $D$-dimensional Reissner-Nordstr\"{o}m-anti-de Sitter (RN-AdS) black hole and a reflecting mirror under charged scalar perturbations are presented in the linear regime. It is found that the stability of the system is heavily affec... |
gr-qc/0310062 | Dr Mayeul Arminjon | Mayeul Arminjon | Gravitational effects on light rays and binary pulsar energy loss in a
scalar theory of gravity | LaTeX, 26 pages, no figure. Accepted for publication in Theor. Math.
Phys. (Teor. Mat. Fiz.) | Theor.Math.Phys. 140 (2004) 1011-1027; Teor.Mat.Fiz. 140 (2004)
139-159 | 10.1023/B:TAMP.0000033037.42732.c5 | null | gr-qc astro-ph | null | A scalar bimetric theory of gravity with a preferred reference frame is
summarized. Dynamics is governed by an extension of Newton's second law. In the
static case, geodesic motion is recovered together with Newton's attraction
field. In the static spherical case, Schwarzschild's metric is found.
Asymptotic schemes o... | [
{
"created": "Mon, 13 Oct 2003 16:17:29 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Arminjon",
"Mayeul",
""
]
] | A scalar bimetric theory of gravity with a preferred reference frame is summarized. Dynamics is governed by an extension of Newton's second law. In the static case, geodesic motion is recovered together with Newton's attraction field. In the static spherical case, Schwarzschild's metric is found. Asymptotic schemes of ... |
1704.05366 | Deng Wang | Deng Wang and Xin-He Meng | Thin-shell wormholes constrained by cosmological observations | 9 pages, 13 figures | Phys.Dark Univ. 17 (2017) 46-51 | 10.1016/j.dark.2017.08.002 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the thin-shell wormholes constrained by cosmological
observations for the first time in the literature. Without loss of generality,
we study the thin-shell wormholes in $\omega$CDM model and analyze their
stability under perturbations preserving the symmetry. Firstly, we constrain
the $\omega$CDM model... | [
{
"created": "Sat, 15 Apr 2017 05:45:25 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Sep 2020 09:10:16 GMT",
"version": "v2"
}
] | 2020-09-09 | [
[
"Wang",
"Deng",
""
],
[
"Meng",
"Xin-He",
""
]
] | We investigate the thin-shell wormholes constrained by cosmological observations for the first time in the literature. Without loss of generality, we study the thin-shell wormholes in $\omega$CDM model and analyze their stability under perturbations preserving the symmetry. Firstly, we constrain the $\omega$CDM model u... |
1004.0379 | Amitai Bin-Nun | Amitai Y. Bin-Nun | Lensing By Sgr A* as a Probe of Modified Gravity | 8 pages, 6 figures. To appear in Phys. Rev. D | Phys.Rev.D82:064009,2010 | 10.1103/PhysRevD.82.064009 | null | gr-qc astro-ph.GA astro-ph.HE hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that a possible astrophysical experiment, detection of lensed images
of stars orbiting close to Sgr A*, can provide insight into the form of the
metric around a black hole. We model Sgr A* as a black hole and add in a
$\frac{1}{r^2}$ term to the Schwarzschild metric near the black hole. We then
attempt to det... | [
{
"created": "Fri, 2 Apr 2010 19:30:28 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Aug 2010 19:33:45 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Bin-Nun",
"Amitai Y.",
""
]
] | We show that a possible astrophysical experiment, detection of lensed images of stars orbiting close to Sgr A*, can provide insight into the form of the metric around a black hole. We model Sgr A* as a black hole and add in a $\frac{1}{r^2}$ term to the Schwarzschild metric near the black hole. We then attempt to deter... |
2210.17533 | Georgios Antoniou | Georgios Antoniou, Alexandros Papageorgiou, Panagiota Kanti | Constraining modified gravity theories with scalar fields using
black-hole images | 17 pages, 9 figures, 2 tables | null | 10.3390/universe9030147 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a number of well-motivated theories of modified gravity with the
common overarching theme that they predict the existence of compact objects
such as black holes and wormholes endowed with scalar hair. We compute the
shadow radius of the resulting compact objects and demonstrate that black hole
images such as... | [
{
"created": "Mon, 31 Oct 2022 17:49:14 GMT",
"version": "v1"
}
] | 2023-03-31 | [
[
"Antoniou",
"Georgios",
""
],
[
"Papageorgiou",
"Alexandros",
""
],
[
"Kanti",
"Panagiota",
""
]
] | We study a number of well-motivated theories of modified gravity with the common overarching theme that they predict the existence of compact objects such as black holes and wormholes endowed with scalar hair. We compute the shadow radius of the resulting compact objects and demonstrate that black hole images such as t... |
1611.09042 | Ya-Peng Hu | Ya-Peng Hu, Xin-Meng Wu, Hongsheng Zhang | Generalized Vaidya Solutions and Misner-Sharp mass for $n$-dimensional
massive gravity | 10 pages, no figure, version published in PRD | Phys. Rev. D 95, 084002 (2017) | 10.1103/PhysRevD.95.084002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dynamical solutions are always of interest to people in gravity theories. We
derive a series of generalized Vaidya solutions in the $n$-dimensional de
Rham-Gabadadze-Tolley (dRGT) massive gravity with a singular reference metric.
Similar to the case of the Einstein gravity, the generalized Vaidya solution
can describ... | [
{
"created": "Mon, 28 Nov 2016 10:00:16 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Apr 2017 17:53:39 GMT",
"version": "v2"
}
] | 2017-04-12 | [
[
"Hu",
"Ya-Peng",
""
],
[
"Wu",
"Xin-Meng",
""
],
[
"Zhang",
"Hongsheng",
""
]
] | Dynamical solutions are always of interest to people in gravity theories. We derive a series of generalized Vaidya solutions in the $n$-dimensional de Rham-Gabadadze-Tolley (dRGT) massive gravity with a singular reference metric. Similar to the case of the Einstein gravity, the generalized Vaidya solution can describe ... |
2303.06343 | Rajesh Kumar | Annu Jaiswal, Rajesh Kumar, Sudhir Kumar Srivastava and S.K.J.Pacif | Eternal homogeneous gravitational collapse: A comprehensive analysis
from $\Theta$ parametrization | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new class of self-gravitating collapsing star models with perfect fluid
distributions is discussed in this work. The paper has a comprehensive analysis
of a homogeneous gravitational collapsing system wherein using a
parametrization scheme for the expansion-scalar $(\Theta )$, the solutions of
the Einstein Field Eq... | [
{
"created": "Sat, 11 Mar 2023 08:30:48 GMT",
"version": "v1"
}
] | 2023-03-14 | [
[
"Jaiswal",
"Annu",
""
],
[
"Kumar",
"Rajesh",
""
],
[
"Srivastava",
"Sudhir Kumar",
""
],
[
"Pacif",
"S. K. J.",
""
]
] | A new class of self-gravitating collapsing star models with perfect fluid distributions is discussed in this work. The paper has a comprehensive analysis of a homogeneous gravitational collapsing system wherein using a parametrization scheme for the expansion-scalar $(\Theta )$, the solutions of the Einstein Field Equa... |
2210.08373 | Roman Konoplya | R. A. Konoplya | Further clarification on quasinormal modes/circular null geodesics
correspondence | 4 pages, one figure, typos corrected | null | 10.1016/j.physletb.2023.137674 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The well-known duality between quasinormal modes of any stationary,
spherically symmetric and asymptotically flat or de Sitter black hole and
parameters of the circular null geodesic was initially claimed for
gravitational and test field perturbations. According to this duality the real
and imaginary parts of the $\e... | [
{
"created": "Sat, 15 Oct 2022 20:51:21 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Oct 2022 12:55:34 GMT",
"version": "v2"
}
] | 2023-01-11 | [
[
"Konoplya",
"R. A.",
""
]
] | The well-known duality between quasinormal modes of any stationary, spherically symmetric and asymptotically flat or de Sitter black hole and parameters of the circular null geodesic was initially claimed for gravitational and test field perturbations. According to this duality the real and imaginary parts of the $\ell... |
1406.1980 | Ahmed Farag Ali | Ahmed Farag Ali, Mir Faizal and Barun Majumder | Absence of an Effective Horizon for Black Holes in Gravity's Rainbow | 5 pages, revtex4, no figures, to appear in Europhysics Letters | Europhys.Lett. 109 (2015) 20001 | 10.1209/0295-5075/109/20001 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that the divergence in time for the asymptotic observer occurs
because of specifying the position of the Horizon beyond the Planck scale. In
fact, a similar divergence in time will also occur for an in-going observer in
Gravity's Rainbow, if we again specify the position of the Horizon beyond the
Planck scal... | [
{
"created": "Sun, 8 Jun 2014 12:59:53 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Dec 2014 16:41:28 GMT",
"version": "v2"
}
] | 2015-01-27 | [
[
"Ali",
"Ahmed Farag",
""
],
[
"Faizal",
"Mir",
""
],
[
"Majumder",
"Barun",
""
]
] | We argue that the divergence in time for the asymptotic observer occurs because of specifying the position of the Horizon beyond the Planck scale. In fact, a similar divergence in time will also occur for an in-going observer in Gravity's Rainbow, if we again specify the position of the Horizon beyond the Planck scale.... |
gr-qc/0510073 | Sunil Maharaj | S.D. Maharaj and M. Chaisi | New anisotropic models from isotropic solutions | 23 pages, To appear in Math. Meth. Appl. Sci | Math.Methods Appl.Sci. 29 (2006) 67-83 | 10.1002/mma.665 | null | gr-qc | null | We establish an algorithm that produces a new solution to the Einstein field
equations, with an anisotropic matter distribution, from a given seed isotropic
solution. The new solution is expressed in terms of integrals of known
functions, and the integration can be completed in principle. The applicability
of this te... | [
{
"created": "Sun, 16 Oct 2005 06:49:16 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Maharaj",
"S. D.",
""
],
[
"Chaisi",
"M.",
""
]
] | We establish an algorithm that produces a new solution to the Einstein field equations, with an anisotropic matter distribution, from a given seed isotropic solution. The new solution is expressed in terms of integrals of known functions, and the integration can be completed in principle. The applicability of this tech... |
1405.4837 | Philippe Grandclement | Philippe Grandclement (LUTH), Claire Som\'e (LUTH), Eric Gourgoulhon
(LUTH) | Models of rotating boson stars and geodesics around them: new type of
orbits | null | Physical Review D 90 (2014) 024068 | 10.1103/PhysRevD.90.024068 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We have developed a highly accurate numerical code capable of solving the
coupled Einstein-Klein-Gordon system, in order to construct rotating boson
stars in general relativity. Free fields and self-interacting fields, with
quartic and sextic potentials, are considered. In particular, we present the
first numerical s... | [
{
"created": "Mon, 19 May 2014 19:00:49 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Jul 2014 11:14:46 GMT",
"version": "v2"
},
{
"created": "Sat, 19 Jul 2014 06:51:14 GMT",
"version": "v3"
}
] | 2014-08-29 | [
[
"Grandclement",
"Philippe",
"",
"LUTH"
],
[
"Somé",
"Claire",
"",
"LUTH"
],
[
"Gourgoulhon",
"Eric",
"",
"LUTH"
]
] | We have developed a highly accurate numerical code capable of solving the coupled Einstein-Klein-Gordon system, in order to construct rotating boson stars in general relativity. Free fields and self-interacting fields, with quartic and sextic potentials, are considered. In particular, we present the first numerical sol... |
gr-qc/9911108 | Boisseau | B. Boisseau | Vortex in a relativistic perfect isentropic fluid and Nambu Goto
dynamics | 11 pages, Accepted for publication in Physical Review D | Phys.Rev. D61 (2000) 083504 | 10.1103/PhysRevD.61.083504 | null | gr-qc | null | By a weak deformation of the cylindrical symmetry of the potential vortex in
a relativistic perfect isentropic fluid, we study the possible dynamics of the
central line of this vortex. In "stiff" material the Nanbu-Goto equations are
obtained
| [
{
"created": "Fri, 26 Nov 1999 18:10:07 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Boisseau",
"B.",
""
]
] | By a weak deformation of the cylindrical symmetry of the potential vortex in a relativistic perfect isentropic fluid, we study the possible dynamics of the central line of this vortex. In "stiff" material the Nanbu-Goto equations are obtained |
1901.03267 | Gianluca Calcagni | Fabio Briscese, Gianluca Calcagni, Leonardo Modesto | Nonlinear stability in nonlocal gravity | 10 pages. v2: minor typos corrected | Phys. Rev. D 99, 084041 (2019) | 10.1103/PhysRevD.99.084041 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We address the stability issue of Ricci-flat and maximally symmetric
spacetimes in nonlocal gravity to all perturbative orders in the gravitational
perturbation. Assuming a potential at least cubic in curvature tensors but
quadratic in the Ricci tensor, our proof consists on a mapping of the stability
analysis in non... | [
{
"created": "Thu, 10 Jan 2019 16:54:43 GMT",
"version": "v1"
},
{
"created": "Tue, 30 Apr 2019 10:51:37 GMT",
"version": "v2"
}
] | 2019-05-01 | [
[
"Briscese",
"Fabio",
""
],
[
"Calcagni",
"Gianluca",
""
],
[
"Modesto",
"Leonardo",
""
]
] | We address the stability issue of Ricci-flat and maximally symmetric spacetimes in nonlocal gravity to all perturbative orders in the gravitational perturbation. Assuming a potential at least cubic in curvature tensors but quadratic in the Ricci tensor, our proof consists on a mapping of the stability analysis in nonlo... |
gr-qc/0609065 | Supratik Pal | Supratik Pal (IIT Kharagpur & Jadavpur University, India) | Braneworld gravitational collapse from a radiative bulk | 8 pages. Revised version. References added. Accepted for publication
in Phys. Rev. D | Phys.Rev. D74 (2006) 124019 | 10.1103/PhysRevD.74.124019 | null | gr-qc astro-ph hep-th | null | We study the fate of a collapsing star on the brane in a generalized
braneworld gravity with bulk matter. Specifically, we investigate for the
possibility of having a static exterior for a collapsing star in the radiative
bulk scenario. Here, the nonlocal correction due to bulk matter is manifest in
an induced mass t... | [
{
"created": "Mon, 18 Sep 2006 05:35:26 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Sep 2006 11:36:51 GMT",
"version": "v2"
},
{
"created": "Sat, 2 Dec 2006 05:29:30 GMT",
"version": "v3"
}
] | 2009-11-11 | [
[
"Pal",
"Supratik",
"",
"IIT Kharagpur & Jadavpur University, India"
]
] | We study the fate of a collapsing star on the brane in a generalized braneworld gravity with bulk matter. Specifically, we investigate for the possibility of having a static exterior for a collapsing star in the radiative bulk scenario. Here, the nonlocal correction due to bulk matter is manifest in an induced mass tha... |
2405.11953 | Pujian Mao | Pujian Mao and Baijun Zeng | Note on post-Minkowskian expansion and Bondi coordinates | null | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this note, we transform the linear order (first order in $G$) metric from
a system of pointlike bodies source to the Bondi coordinates. We confirm that
the Bondi 4-momentum and angular momentum of the system computed at null
infinity in Bondi coordinates coincide with the relativistic definitions of
4-momentum and... | [
{
"created": "Mon, 20 May 2024 11:17:33 GMT",
"version": "v1"
}
] | 2024-05-21 | [
[
"Mao",
"Pujian",
""
],
[
"Zeng",
"Baijun",
""
]
] | In this note, we transform the linear order (first order in $G$) metric from a system of pointlike bodies source to the Bondi coordinates. We confirm that the Bondi 4-momentum and angular momentum of the system computed at null infinity in Bondi coordinates coincide with the relativistic definitions of 4-momentum and a... |
2011.00736 | Marcos Leopoldo Wayhs Basso | Marcos L. W. Basso and Jonas Maziero | Complete complementarity relations in curved spacetimes | 12 pages, 9 figures | Phys. Rev. A 103, 032210 (2021) | 10.1103/PhysRevA.103.032210 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We extend complete complementarity relations to curved spacetimes by
considering a succession of infinitesimal local Lorentz transformations, which
implies that complementarity remains valid as the quanton travels through its
world line and the complementarity aspects in different points of spacetime are
connected. T... | [
{
"created": "Fri, 30 Oct 2020 14:22:45 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Feb 2021 23:12:46 GMT",
"version": "v2"
},
{
"created": "Mon, 15 Mar 2021 17:51:24 GMT",
"version": "v3"
}
] | 2021-03-16 | [
[
"Basso",
"Marcos L. W.",
""
],
[
"Maziero",
"Jonas",
""
]
] | We extend complete complementarity relations to curved spacetimes by considering a succession of infinitesimal local Lorentz transformations, which implies that complementarity remains valid as the quanton travels through its world line and the complementarity aspects in different points of spacetime are connected. Thi... |
1406.4090 | Ahmed Alhamzawi | Ahmed Alhamzawi and Rahim Alhamzawi | On f(R) gravity | 5 pages, 0 figuers. arXiv admin note: text overlap with
arXiv:1401.0046 by other authors | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A review of the new of the problem of dark energy using modified gravity
approach is considered. An explanation of the difficulties facing modern
cosmology is given and different approaches are presented. We show why some
models of gravity may suffer of instabilities and how some are inconsistent
with observations.
| [
{
"created": "Mon, 16 Jun 2014 18:22:26 GMT",
"version": "v1"
},
{
"created": "Tue, 17 Jun 2014 11:11:06 GMT",
"version": "v2"
}
] | 2014-06-18 | [
[
"Alhamzawi",
"Ahmed",
""
],
[
"Alhamzawi",
"Rahim",
""
]
] | A review of the new of the problem of dark energy using modified gravity approach is considered. An explanation of the difficulties facing modern cosmology is given and different approaches are presented. We show why some models of gravity may suffer of instabilities and how some are inconsistent with observations. |
2104.05033 | Yun Kau Lau | Xuefei Gong, Shengnian Xu, Shanquan Gui, Shuanglin Huang and Yun-Kau
Lau | Mission Design for the TAIJI misson and Structure Formation in Early
Universe | Two authors added to the preprint, to appear in "Handbook of
Gravitational Wave Astronomy, Springer". arXiv admin note: text overlap with
arXiv:1410.7296 | null | 10.1007/978-981-15-4702-7_24-1 | null | gr-qc astro-ph.GA | http://creativecommons.org/licenses/by/4.0/ | Gravitational wave detection in space promises to open a new window in
astronomy to study the strong field dynamics of gravitational physics in
astrophysics and cosmology. The present article is an extract of a report on a
feasibility study of gravitational wave detection in space, commissioned by the
National Space ... | [
{
"created": "Sun, 11 Apr 2021 15:38:34 GMT",
"version": "v1"
},
{
"created": "Sun, 2 May 2021 14:03:24 GMT",
"version": "v2"
}
] | 2022-07-20 | [
[
"Gong",
"Xuefei",
""
],
[
"Xu",
"Shengnian",
""
],
[
"Gui",
"Shanquan",
""
],
[
"Huang",
"Shuanglin",
""
],
[
"Lau",
"Yun-Kau",
""
]
] | Gravitational wave detection in space promises to open a new window in astronomy to study the strong field dynamics of gravitational physics in astrophysics and cosmology. The present article is an extract of a report on a feasibility study of gravitational wave detection in space, commissioned by the National Space Sc... |
0711.2086 | Gaurav Khanna | Subir Sabharwal and Gaurav Khanna | Numerical solutions to lattice-refined models in loop quantum cosmology | null | Class.Quant.Grav.25:085009,2008 | 10.1088/0264-9381/25/8/085009 | null | gr-qc | null | In this article, we develop an intuitive and efficient, numerical technique
to solve the quantum evolution equation of generic lattice-refined models in
loop quantum cosmology. As an application of this method, we extensively study
the solutions of the recently introduced, lattice-refined anisotropic model of
the Sch... | [
{
"created": "Tue, 13 Nov 2007 22:15:10 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Sabharwal",
"Subir",
""
],
[
"Khanna",
"Gaurav",
""
]
] | In this article, we develop an intuitive and efficient, numerical technique to solve the quantum evolution equation of generic lattice-refined models in loop quantum cosmology. As an application of this method, we extensively study the solutions of the recently introduced, lattice-refined anisotropic model of the Schwa... |
2202.00818 | Yuri Shtanov | Yuri Shtanov | On the Conformal Frames in $f(R)$ Gravity | 11 pages, Universe Special Issue "Modified Theories of Gravity and
Cosmological Applications" | Universe 8(2), 69 (2022) | 10.3390/universe8020069 | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | We discuss gravitational physics in the Jordan and Einstein frames of $f (R)$
gravity coupled to the Standard Model. We elucidate the way in which the
observed gravitational coupling arises in the Einstein frame for generic $f
(R)$. We point out that the effect of "running units" in the Einstein frame is
related to t... | [
{
"created": "Wed, 2 Feb 2022 00:17:08 GMT",
"version": "v1"
}
] | 2022-02-03 | [
[
"Shtanov",
"Yuri",
""
]
] | We discuss gravitational physics in the Jordan and Einstein frames of $f (R)$ gravity coupled to the Standard Model. We elucidate the way in which the observed gravitational coupling arises in the Einstein frame for generic $f (R)$. We point out that the effect of "running units" in the Einstein frame is related to the... |
gr-qc/0510013 | Megandhren Govender | N F Naidu and M Govender | Causal temperature profiles in horizon-free collapse | 8 pages, 2 figures, submitted to Mod. Phys. Lett. A | null | null | null | gr-qc | null | We investigate the causal temperature profiles in a recent model of a
radiating star undergoing dissipative gravitational collapse without the
formation of an horizon. It is shown that this simple exact model provides a
physically reasonable behaviour for the temperature profile within the
framework of extended irrev... | [
{
"created": "Tue, 4 Oct 2005 12:19:47 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Naidu",
"N F",
""
],
[
"Govender",
"M",
""
]
] | We investigate the causal temperature profiles in a recent model of a radiating star undergoing dissipative gravitational collapse without the formation of an horizon. It is shown that this simple exact model provides a physically reasonable behaviour for the temperature profile within the framework of extended irrever... |
gr-qc/0611156 | Manu Mathur | N. D. Hari Dass, Manu Mathur | On Loop States in Loop Quantum Gravity | 12 pages, 3 figures, the version to be published in Classical and
Quantum Gravity | Class.Quant.Grav.24:2179-2192,2007 | 10.1088/0264-9381/24/9/002 | Sokendai-HKTK/061202 | gr-qc hep-th | null | We explicitly construct and characterize all possible independent loop states
in 3+1 dimensional loop quantum gravity by regulating it on a 3-d regular
lattice in the Hamiltonian formalism. These loop states, characterized by the
(dual) angular momentum quantum numbers, describe SU(2) rigid rotators on the
links of t... | [
{
"created": "Thu, 30 Nov 2006 06:32:19 GMT",
"version": "v1"
},
{
"created": "Wed, 21 Mar 2007 08:53:08 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Dass",
"N. D. Hari",
""
],
[
"Mathur",
"Manu",
""
]
] | We explicitly construct and characterize all possible independent loop states in 3+1 dimensional loop quantum gravity by regulating it on a 3-d regular lattice in the Hamiltonian formalism. These loop states, characterized by the (dual) angular momentum quantum numbers, describe SU(2) rigid rotators on the links of the... |
1202.3099 | Larry Ford | L. H. Ford, V. A. De Lorenci, G. Menezes and N. F. Svaiter | An Analog Model for Quantum Lightcone Fluctuations in Nonlinear Optics | 15 pages, no figures | Annals of Physics, 329, 80 (2013) | 10.1016/j.aop.2012.10.002 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose an analog model for quantum gravity effects using nonlinear
dielectrics. Fluctuations of the spacetime lightcone are expected in quantum
gravity, leading to variations in the flight times of pulses. This effect can
also arise in a nonlinear material. We propose a model in which fluctuations of
a background... | [
{
"created": "Tue, 14 Feb 2012 17:36:38 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Ford",
"L. H.",
""
],
[
"De Lorenci",
"V. A.",
""
],
[
"Menezes",
"G.",
""
],
[
"Svaiter",
"N. F.",
""
]
] | We propose an analog model for quantum gravity effects using nonlinear dielectrics. Fluctuations of the spacetime lightcone are expected in quantum gravity, leading to variations in the flight times of pulses. This effect can also arise in a nonlinear material. We propose a model in which fluctuations of a background e... |
gr-qc/9607052 | Akihiro Ishibashi | Kengo Maeda and Akihiro Ishibashi | Strong Cosmic Censorship and Causality Violation | corrected version, 8 pages, one eps figure is included | Phys.Rev. D56 (1997) 2094-2099 | 10.1103/PhysRevD.56.2094 | null | gr-qc | null | We investigate the instability of the Cauchy horizon caused by causality
violation in the compact vacuum universe with the topology $B\times {\bf
S}^{1}\times {\bf R}$, which Moncrief and Isenberg considered. We show that if
the occurrence of curvature singularities are restricted to the boundary of
causality violati... | [
{
"created": "Tue, 23 Jul 1996 15:39:04 GMT",
"version": "v1"
},
{
"created": "Mon, 27 Jan 1997 08:01:31 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Maeda",
"Kengo",
""
],
[
"Ishibashi",
"Akihiro",
""
]
] | We investigate the instability of the Cauchy horizon caused by causality violation in the compact vacuum universe with the topology $B\times {\bf S}^{1}\times {\bf R}$, which Moncrief and Isenberg considered. We show that if the occurrence of curvature singularities are restricted to the boundary of causality violating... |
1110.3753 | Elias C. Vagenas | Saurya Das and Elias C. Vagenas | Quantum aether and an invariant Planck scale | 3 pages, LaTeX, no figures, to appear in EPL | Europhys.Lett.96:50005,2011 | 10.1209/0295-5075/96/50005 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that a quantum aether is consistent with the principle of relativity
and can provide an economical way of having an invariant quantum gravity or
Planck scale. We also show that it may change the effective scale at which
quantum gravity effects may be observable.
| [
{
"created": "Mon, 17 Oct 2011 18:25:19 GMT",
"version": "v1"
}
] | 2012-02-02 | [
[
"Das",
"Saurya",
""
],
[
"Vagenas",
"Elias C.",
""
]
] | We argue that a quantum aether is consistent with the principle of relativity and can provide an economical way of having an invariant quantum gravity or Planck scale. We also show that it may change the effective scale at which quantum gravity effects may be observable. |
2109.05845 | Nomaan X | Abhishek Mathur, Sumati Surya and Nomaan X | Spacetime Entanglement Entropy of de Sitter and Black Hole Horizons | 17 pages, 3 figures | null | 10.1088/1361-6382/ac4197 | null | gr-qc | http://creativecommons.org/licenses/by-nc-sa/4.0/ | We calculate Sorkin's manifestly covariant entanglement entropy $\mathcal{S}$
for a massive and massless minimally coupled free Gaussian scalar field for the
de Sitter horizon and Schwarzschild de Sitter horizons respectively in $d > 2$.
In de Sitter spacetime we restrict the Bunch-Davies vacuum in the conformal
patc... | [
{
"created": "Mon, 13 Sep 2021 10:18:01 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Sep 2021 09:04:24 GMT",
"version": "v2"
},
{
"created": "Sat, 22 Jan 2022 10:48:19 GMT",
"version": "v3"
}
] | 2022-01-25 | [
[
"Mathur",
"Abhishek",
""
],
[
"Surya",
"Sumati",
""
],
[
"X",
"Nomaan",
""
]
] | We calculate Sorkin's manifestly covariant entanglement entropy $\mathcal{S}$ for a massive and massless minimally coupled free Gaussian scalar field for the de Sitter horizon and Schwarzschild de Sitter horizons respectively in $d > 2$. In de Sitter spacetime we restrict the Bunch-Davies vacuum in the conformal patch ... |
gr-qc/9302031 | null | B. L. Hu | Quantum Statistical Processes in the Early Universe | umdpp 93-59, 23 pages, Latex Invited Talk at the Conference on {\it
Quantum Physics and the Universe} Waseda University, Tokyo, August 1992.
Proceedings edited by M. Namiki, K. Maeda, et al (Pergamon Press, Tokyo,
1993) | null | 10.1016/0083-6656(93)90066-S | null | gr-qc | null | We show how the concept of quantum open system and the methods in
non-equilibrium statistical mechanics can be usefully applied to studies of
quantum statistical processes in the early universe. We first sketch how noise,
fluctuation, dissipation and decoherence processes arise in a wide range of
cosmological problem... | [
{
"created": "Mon, 22 Feb 1993 22:56:00 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Hu",
"B. L.",
""
]
] | We show how the concept of quantum open system and the methods in non-equilibrium statistical mechanics can be usefully applied to studies of quantum statistical processes in the early universe. We first sketch how noise, fluctuation, dissipation and decoherence processes arise in a wide range of cosmological problems.... |
1706.05379 | Ra\'ul Carballo-Rubio | Ra\'ul Carballo-Rubio | Stellar equilibrium in semiclassical gravity | V3: 14 pages, 1 figure. Some discussions and clarifications added in
response to the referee's comments. No physics changes. This version accepted
for publication in Physical Review Letters | Phys. Rev. Lett. 120, 061102 (2018) | 10.1103/PhysRevLett.120.061102 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The phenomenon of quantum vacuum polarization in the presence of a
gravitational field is well understood and is expected to have a physical
reality, but studies of its back-reaction on the dynamics of spacetime are
practically non-existent outside the specific context of homogeneous
cosmologies. Building on previous... | [
{
"created": "Fri, 16 Jun 2017 18:00:00 GMT",
"version": "v1"
},
{
"created": "Tue, 27 Jun 2017 17:09:52 GMT",
"version": "v2"
},
{
"created": "Tue, 6 Feb 2018 18:50:37 GMT",
"version": "v3"
}
] | 2018-02-08 | [
[
"Carballo-Rubio",
"Raúl",
""
]
] | The phenomenon of quantum vacuum polarization in the presence of a gravitational field is well understood and is expected to have a physical reality, but studies of its back-reaction on the dynamics of spacetime are practically non-existent outside the specific context of homogeneous cosmologies. Building on previous r... |
0709.4674 | Luis Herrera | L. Herrera | Possible way out of the Hawking paradox: Erasing the information at the
horizon | 11 pages, Latex. Some comments added to answer to some raised
questions. Typos corected. Final version, to appear in Int. J. Modern. Phys.
D | Int.J.Mod.Phys.D17:2507-2514,2009 | 10.1142/S0218271808013996 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that small deviations from spherical symmetry, described by means of
exact solutions to Einstein equations, provide a mechanism to "bleach" the
information about the collapsing body as it falls through the aparent horizon,
thereby resolving the information loss paradox. The resulting picture and its
implicati... | [
{
"created": "Fri, 28 Sep 2007 19:12:31 GMT",
"version": "v1"
},
{
"created": "Sun, 30 Mar 2008 21:36:52 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Oct 2008 19:41:45 GMT",
"version": "v3"
},
{
"created": "Mon, 16 Mar 2009 10:00:49 GMT",
"version": "v4"
}
] | 2009-03-20 | [
[
"Herrera",
"L.",
""
]
] | We show that small deviations from spherical symmetry, described by means of exact solutions to Einstein equations, provide a mechanism to "bleach" the information about the collapsing body as it falls through the aparent horizon, thereby resolving the information loss paradox. The resulting picture and its implication... |
2310.09429 | Francisco Turrubiates Dr. | Maciej Przanowski, Micha{\l} Dobrski, Jaromir Tosiek and Francisco J.
Turrubiates | Linear graviton as a quantum particle | 17 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Wave function of a single linear graviton and its interpretation are
proposed. The evolution equation for this function is given. A Hermitian
operator with mutually commuting components canonically conjugated to the
momentum operator of the linear graviton is found.
| [
{
"created": "Fri, 13 Oct 2023 22:25:19 GMT",
"version": "v1"
}
] | 2023-10-17 | [
[
"Przanowski",
"Maciej",
""
],
[
"Dobrski",
"Michał",
""
],
[
"Tosiek",
"Jaromir",
""
],
[
"Turrubiates",
"Francisco J.",
""
]
] | Wave function of a single linear graviton and its interpretation are proposed. The evolution equation for this function is given. A Hermitian operator with mutually commuting components canonically conjugated to the momentum operator of the linear graviton is found. |
gr-qc/0412056 | Jerzy Matyjasek | Jerzy Matyjasek | Approximate stress-energy tensor of the massless spin-1/2 field in
Schwarzschild spacetime | null | Phys.Rev. D71 (2005) 027504 | 10.1103/PhysRevD.71.027504 | null | gr-qc | null | The approximate stress-energy tensor of the conformally invariant massless
spin-1/2 field in the Hartle-Hawking state in the Schwarzschild spacetime is
constructed. It is shown that by solving the conservation equation in conformal
space and utilizing the regularity conditions in a physical metric one obtains
the str... | [
{
"created": "Sun, 12 Dec 2004 18:00:43 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Matyjasek",
"Jerzy",
""
]
] | The approximate stress-energy tensor of the conformally invariant massless spin-1/2 field in the Hartle-Hawking state in the Schwarzschild spacetime is constructed. It is shown that by solving the conservation equation in conformal space and utilizing the regularity conditions in a physical metric one obtains the stres... |
1709.06541 | Reza Saffari | Sobhan Kazempour and Saheb Soroushfar | Investigation the geodesic motion of three dimensional rotating black
holes | 22 pages, 16 figures, 3 tables | Chinese Journal of Physics (2020) | 10.1016/j.cjph.2020.04.004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the geodesic equations in the space-time of neutral Brans-Dicke
Dilaton black hole in three dimensions, BTZ black holes and the 2+1 black hole.
We use the process of separation of the Hamilton-Jacobi equation to obtain the
constants of motion. The whole analytical solution of the geodesic equations in
the sp... | [
{
"created": "Tue, 19 Sep 2017 17:38:37 GMT",
"version": "v1"
},
{
"created": "Sat, 28 Jul 2018 07:56:46 GMT",
"version": "v2"
},
{
"created": "Mon, 1 Apr 2019 11:22:07 GMT",
"version": "v3"
}
] | 2020-04-28 | [
[
"Kazempour",
"Sobhan",
""
],
[
"Soroushfar",
"Saheb",
""
]
] | We study the geodesic equations in the space-time of neutral Brans-Dicke Dilaton black hole in three dimensions, BTZ black holes and the 2+1 black hole. We use the process of separation of the Hamilton-Jacobi equation to obtain the constants of motion. The whole analytical solution of the geodesic equations in the spac... |
2312.17559 | Juan Carlos Degollado | Daniel Nunez, Juan Carlos Degollado | Shadow of a collapsing star in a regular spacetime | 12 pages, 5 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We describe the dynamical formation of the shadow of a collapsing star in a
Hayward spacetime in terms of an observer far away from the center and a free
falling observer. By solving the time-like and light-like radial geodesics we
determine the angular size of the shadow as a function of time. We found that
the form... | [
{
"created": "Fri, 29 Dec 2023 11:06:59 GMT",
"version": "v1"
}
] | 2024-01-01 | [
[
"Nunez",
"Daniel",
""
],
[
"Degollado",
"Juan Carlos",
""
]
] | We describe the dynamical formation of the shadow of a collapsing star in a Hayward spacetime in terms of an observer far away from the center and a free falling observer. By solving the time-like and light-like radial geodesics we determine the angular size of the shadow as a function of time. We found that the format... |
2205.11715 | Yakov Shlapentokh-Rothman | Yakov Shlapentokh-Rothman | Twisted Self-Similarity and the Einstein Vacuum Equations | 45 pages, 5 figures, final version | null | 10.1007/s00220-023-04688-8 | null | gr-qc math-ph math.AP math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the previous works [I. Rodnianski and Y. Shlapentokh-Rothman, Naked
Singularities for the Einstein Vacuum Equations: The Exterior Solution,
arXiv:1912.08478 and Y. Shlapentokh-Rothman, Naked Singularities for the
Einstein Vacuum Equations: The Interior Solution, arXiv:2204.09891] we have
introduced a new type of s... | [
{
"created": "Tue, 24 May 2022 01:36:02 GMT",
"version": "v1"
},
{
"created": "Thu, 2 Mar 2023 06:48:12 GMT",
"version": "v2"
}
] | 2023-04-19 | [
[
"Shlapentokh-Rothman",
"Yakov",
""
]
] | In the previous works [I. Rodnianski and Y. Shlapentokh-Rothman, Naked Singularities for the Einstein Vacuum Equations: The Exterior Solution, arXiv:1912.08478 and Y. Shlapentokh-Rothman, Naked Singularities for the Einstein Vacuum Equations: The Interior Solution, arXiv:2204.09891] we have introduced a new type of sel... |
1409.7273 | Aur\'elien Hees | A. Hees, O. Minazzoli, J. Larena | Observables in theories with a varying fine structure constant | 14 pages, matched published version | Gen. Rel. and Grav. 47, 2, 2015 | 10.1007/s10714-015-1855-y | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show how two seemingly different theories with a scalar multiplicative
coupling to electrodynamics are actually two equivalent parametrisations of the
same theory: despite some differences in the interpretation of some
phenemenological aspects of the parametrisations, they lead to the same
physical observables. Th... | [
{
"created": "Thu, 25 Sep 2014 14:39:30 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jan 2015 14:24:11 GMT",
"version": "v2"
},
{
"created": "Sat, 24 Jan 2015 11:09:04 GMT",
"version": "v3"
}
] | 2015-01-27 | [
[
"Hees",
"A.",
""
],
[
"Minazzoli",
"O.",
""
],
[
"Larena",
"J.",
""
]
] | We show how two seemingly different theories with a scalar multiplicative coupling to electrodynamics are actually two equivalent parametrisations of the same theory: despite some differences in the interpretation of some phenemenological aspects of the parametrisations, they lead to the same physical observables. This... |
gr-qc/9404051 | Joseph Samuel | J.Samuel and R.Nityananda | Comment on ``Meaning of the Wave Function'' | 6 pages, rritp94-4-2 | null | null | null | gr-qc hep-th | null | We draw attention to an elementary flaw in a recently proposed experiment to
measure the wave function of a single quantum system.
| [
{
"created": "Tue, 26 Apr 1994 12:45:17 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Samuel",
"J.",
""
],
[
"Nityananda",
"R.",
""
]
] | We draw attention to an elementary flaw in a recently proposed experiment to measure the wave function of a single quantum system. |
gr-qc/0505137 | Matt Visser | Celine Cattoen (Victoria University of Wellington), Tristan Faber
(Victoria University of Wellington), Matt Visser (Victoria University of
Wellington) | Gravastars must have anisotropic pressures | V1: 15 pages; 4 figures; uses iopart.cls; V2: 16 pages; added 3
references and brief discussion | Class.Quant.Grav.22:4189-4202,2005 | 10.1088/0264-9381/22/20/002 | null | gr-qc astro-ph hep-th | null | One of the very small number of serious alternatives to the usual concept of
an astrophysical black hole is the "gravastar" model developed by Mazur and
Mottola; and a related phase-transition model due to Laughlin et al. We
consider a generalized class of similar models that exhibit continuous pressure
-- without th... | [
{
"created": "Fri, 27 May 2005 02:36:51 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Jun 2005 04:26:51 GMT",
"version": "v2"
}
] | 2009-04-17 | [
[
"Cattoen",
"Celine",
"",
"Victoria University of Wellington"
],
[
"Faber",
"Tristan",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of\n Wellington"
]
] | One of the very small number of serious alternatives to the usual concept of an astrophysical black hole is the "gravastar" model developed by Mazur and Mottola; and a related phase-transition model due to Laughlin et al. We consider a generalized class of similar models that exhibit continuous pressure -- without the ... |
gr-qc/9903065 | Caccese | E. Caccese, V. A. Cimmelli and A. R. Pace | Theories of Space and Time Compatible with the Inertia Principle | 26 pages, Plain TeX, no figures | null | null | Dept. Math. Univ. Basilicata Preprint N. 10 (1999) | gr-qc | null | A general formal definition of a theory of space and time compatible with the
inertia principle is given. The formal definition of reference frame and
inertial equivalence between reference frames are used to construct the class
of inertial frames. Then, suitable cocycle relations among the coefficients of
space-time... | [
{
"created": "Wed, 17 Mar 1999 17:18:44 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Caccese",
"E.",
""
],
[
"Cimmelli",
"V. A.",
""
],
[
"Pace",
"A. R.",
""
]
] | A general formal definition of a theory of space and time compatible with the inertia principle is given. The formal definition of reference frame and inertial equivalence between reference frames are used to construct the class of inertial frames. Then, suitable cocycle relations among the coefficients of space-time t... |
gr-qc/0003071 | Miguel Alcubierre | Miguel Alcubierre, Bernd Bruegmann, Thomas Dramlitsch, Jose A. Font,
Philippos Papadopoulos, Edward Seidel, Nikolaos Stergioulas, Ryoji Takahashi | Towards a Stable Numerical Evolution of Strongly Gravitating Systems in
General Relativity: The Conformal Treatments | 17 pages, 15 figures. Small changes in the text, and a change in the
list of authors. One new reference added | Phys.Rev.D62:044034,2000 | 10.1103/PhysRevD.62.044034 | null | gr-qc astro-ph | null | We study the stability of three-dimensional numerical evolutions of the
Einstein equations, comparing the standard ADM formulation to variations on a
family of formulations that separate out the conformal and traceless parts of
the system. We develop an implementation of the conformal-traceless (CT)
approach that has... | [
{
"created": "Fri, 17 Mar 2000 11:37:17 GMT",
"version": "v1"
},
{
"created": "Thu, 11 May 2000 08:49:54 GMT",
"version": "v2"
}
] | 2009-09-25 | [
[
"Alcubierre",
"Miguel",
""
],
[
"Bruegmann",
"Bernd",
""
],
[
"Dramlitsch",
"Thomas",
""
],
[
"Font",
"Jose A.",
""
],
[
"Papadopoulos",
"Philippos",
""
],
[
"Seidel",
"Edward",
""
],
[
"Stergioulas",
"Nikolaos... | We study the stability of three-dimensional numerical evolutions of the Einstein equations, comparing the standard ADM formulation to variations on a family of formulations that separate out the conformal and traceless parts of the system. We develop an implementation of the conformal-traceless (CT) approach that has i... |
gr-qc/9805057 | Valerio Faraoni | Valerio Faraoni | The omega-tends-to-infinity limit of Brans-Dicke theory | 9 pages, no figures, plain LaTeX. To appear in Phys. Lett. A | Phys.Lett.A245:26-30,1998 | 10.1016/S0375-9601(98)00387-9 | null | gr-qc astro-ph hep-th math-ph math.MP | null | The standard tenet that Brans-Dicke theory reduces to general relativity in
the omega-tends-to-infinity limit has been shown to be false when the trace of
the matter energy-momentum tensor vanishes. The issue is clarified in a new
approach and the asymptotic behaviour of the Brans-Dicke scalar is rigorously
derived.
| [
{
"created": "Thu, 14 May 1998 11:07:56 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Faraoni",
"Valerio",
""
]
] | The standard tenet that Brans-Dicke theory reduces to general relativity in the omega-tends-to-infinity limit has been shown to be false when the trace of the matter energy-momentum tensor vanishes. The issue is clarified in a new approach and the asymptotic behaviour of the Brans-Dicke scalar is rigorously derived. |
gr-qc/9712053 | Viqar Husain | Abhay Ashtekar and Viqar Husain | Symmetry reduced Einstein gravity and generalized sigma and chiral
models | 17 pages, latex, reference added, a subtlety commented on; to appear
in Int. J. Mod. Phys. D | Int.J.Mod.Phys. D7 (1998) 549-566 | 10.1142/S0218271898000371 | CGPG-97/12-3 | gr-qc hep-th | null | Certain features associated with the symmetry reduction of the vacuum
Einstein equations by two commuting, space-like Killing vector fields are
studied. In particular, the discussion encompasses the equations for the Gowdy
$T^3$ cosmology and cylindrical gravitational waves. We first point out a
relation between the ... | [
{
"created": "Thu, 11 Dec 1997 21:45:38 GMT",
"version": "v1"
},
{
"created": "Thu, 12 Feb 1998 01:30:52 GMT",
"version": "v2"
}
] | 2009-10-30 | [
[
"Ashtekar",
"Abhay",
""
],
[
"Husain",
"Viqar",
""
]
] | Certain features associated with the symmetry reduction of the vacuum Einstein equations by two commuting, space-like Killing vector fields are studied. In particular, the discussion encompasses the equations for the Gowdy $T^3$ cosmology and cylindrical gravitational waves. We first point out a relation between the $S... |
0908.1780 | Frans Pretorius | Matthew W. Choptuik, Frans Pretorius | Ultra Relativistic Particle Collisions | 4 pages, 2 figures (replaced with version similar to published one) | Phys.Rev.Lett.104:111101,2010 | 10.1103/PhysRevLett.104.111101 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present results from numerical solution of the Einstein field equations
describing the head-on collision of two solitons boosted to ultra relativistic
energies. We show, for the first time, that at sufficiently high energies the
collision leads to black hole formation, consistent with hoop conjecture
arguments. Th... | [
{
"created": "Wed, 12 Aug 2009 19:42:21 GMT",
"version": "v1"
},
{
"created": "Mon, 12 Jul 2010 03:33:23 GMT",
"version": "v2"
}
] | 2010-07-13 | [
[
"Choptuik",
"Matthew W.",
""
],
[
"Pretorius",
"Frans",
""
]
] | We present results from numerical solution of the Einstein field equations describing the head-on collision of two solitons boosted to ultra relativistic energies. We show, for the first time, that at sufficiently high energies the collision leads to black hole formation, consistent with hoop conjecture arguments. This... |
1602.04454 | Hristu Culetu | Hristu Culetu | Horizon pressure from junction conditions for Schwarzschild and Rindler
geometries | 9 pages, no figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We assumed a stress tensor is necessary on the event horizon of a
Schwarzschild black hole or on the Rindler horizon for the Israel matching
conditions to be satisfied. We found the surface energy density $\rho_{s}$ is
vanishing but the surface pressure $p_{s}$ equals $1/16\pi l$ in both cases,
where $l$ is the prope... | [
{
"created": "Sun, 14 Feb 2016 13:56:44 GMT",
"version": "v1"
}
] | 2016-02-16 | [
[
"Culetu",
"Hristu",
""
]
] | We assumed a stress tensor is necessary on the event horizon of a Schwarzschild black hole or on the Rindler horizon for the Israel matching conditions to be satisfied. We found the surface energy density $\rho_{s}$ is vanishing but the surface pressure $p_{s}$ equals $1/16\pi l$ in both cases, where $l$ is the proper ... |
2104.06097 | Genly Le\'on | Andronikos Paliathanasis, Genly Leon, Wompherdeiki Khyllep, Jibitesh
Dutta, Supriya Pan | Interacting quintessence in light of Generalized Uncertainty Principle:
Cosmological perturbations and dynamics | 24 pages, 9 compound figures, published version in EPJC | Paliathanasis, A., Leon, G., Khyllep, W., Dutta, J., Pan, S.
Interacting quintessence in light of generalized uncertainty principle:
cosmological perturbations and dynamics. Eur. Phys. J. C 81, 607 (2021) | 10.1140/epjc/s10052-021-09362-8 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a cosmological scenario endowed with an interaction between the
universe's dark components $-$ dark matter and dark energy. Specifically, we
assume the dark matter component to be a pressure-less fluid, while the dark
energy component is a quintessence scalar field with Lagrangian function
modified by the... | [
{
"created": "Tue, 13 Apr 2021 11:03:57 GMT",
"version": "v1"
},
{
"created": "Sun, 1 Aug 2021 23:24:35 GMT",
"version": "v2"
}
] | 2021-08-03 | [
[
"Paliathanasis",
"Andronikos",
""
],
[
"Leon",
"Genly",
""
],
[
"Khyllep",
"Wompherdeiki",
""
],
[
"Dutta",
"Jibitesh",
""
],
[
"Pan",
"Supriya",
""
]
] | We consider a cosmological scenario endowed with an interaction between the universe's dark components $-$ dark matter and dark energy. Specifically, we assume the dark matter component to be a pressure-less fluid, while the dark energy component is a quintessence scalar field with Lagrangian function modified by the q... |
1205.3751 | Paulo C. Freire | Paulo C. C. Freire, Michael Kramer and Norbert Wex | Tests of the universality of free fall for strongly self-gravitating
bodies with radio pulsars | 19 pages, two figures; in press in Classical and Quantum Gravity as
an invited review on the "focus issue" on Tests of the Weak Equivalence
Principle, organized by Clive Speake and Clifford Will, proof corrections
added | null | 10.1088/0264-9381/29/18/184007 | null | gr-qc astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we review tests of the strong equivalence principle (SEP)
derived from pulsar-white dwarf data. The extreme difference in binding energy
between both components and the precise measurement of the orbital motion
provided by pulsar timing allow the only current precision SEP tests for
strongly self-gravi... | [
{
"created": "Wed, 16 May 2012 18:08:30 GMT",
"version": "v1"
},
{
"created": "Wed, 20 Jun 2012 14:02:31 GMT",
"version": "v2"
}
] | 2015-06-05 | [
[
"Freire",
"Paulo C. C.",
""
],
[
"Kramer",
"Michael",
""
],
[
"Wex",
"Norbert",
""
]
] | In this paper, we review tests of the strong equivalence principle (SEP) derived from pulsar-white dwarf data. The extreme difference in binding energy between both components and the precise measurement of the orbital motion provided by pulsar timing allow the only current precision SEP tests for strongly self-gravita... |
2012.11512 | Viola Sordini | Florian Aubin, Francesco Brighenti, Roberto Chierici, Dimitri Estevez,
Giuseppe Greco, Gianluca Maria Guidi, Vincent Juste, Fr\'ed\'erique Marion,
Benoit Mours, Elisa Nitoglia, Orion Sauter, Viola Sordini | The MBTA Pipeline for Detecting Compact Binary Coalescences in the Third
LIGO-Virgo Observing Run | Accepted by Classical and Quantum Gravity | 2021 Class. Quantum Grav. 38 095004 | 10.1088/1361-6382/abe913 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe the Multi-Band Template Analysis (MBTA) search for gravitational
waves signals from coalescences of compact objects in the LIGO-Virgo data, at
the time of the third observing run (2019-2020), both for low-latency
detections and for offline analysis. Details are given on the architecture and
functioning of... | [
{
"created": "Mon, 21 Dec 2020 17:27:32 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Feb 2021 17:11:24 GMT",
"version": "v2"
}
] | 2021-04-13 | [
[
"Aubin",
"Florian",
""
],
[
"Brighenti",
"Francesco",
""
],
[
"Chierici",
"Roberto",
""
],
[
"Estevez",
"Dimitri",
""
],
[
"Greco",
"Giuseppe",
""
],
[
"Guidi",
"Gianluca Maria",
""
],
[
"Juste",
"Vincent",
... | We describe the Multi-Band Template Analysis (MBTA) search for gravitational waves signals from coalescences of compact objects in the LIGO-Virgo data, at the time of the third observing run (2019-2020), both for low-latency detections and for offline analysis. Details are given on the architecture and functioning of t... |
1301.2540 | Roberto Chan | G. Pinheiro and R. Chan | Radiating Gravitational Collapse with Shearing Motion and Bulk Viscosity
Revisited | 39 pages and 17 figures. Published in IJMPD | Int.J. Mod. Phys. D,19,1797-1822 (2010) | 10.1142/S0218271810018050 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new model is proposed to a collapsing star consisting of an anisotropic
fluid with bulk viscosity, radial heat flow and outgoing radiation. In a
previous paper one of us has introduced a function time dependent into the
$g_{rr}$, besides the time dependent metric functions $g_{\theta\theta}$ and
$g_{\phi\phi}$. The... | [
{
"created": "Fri, 11 Jan 2013 16:35:26 GMT",
"version": "v1"
}
] | 2013-01-14 | [
[
"Pinheiro",
"G.",
""
],
[
"Chan",
"R.",
""
]
] | A new model is proposed to a collapsing star consisting of an anisotropic fluid with bulk viscosity, radial heat flow and outgoing radiation. In a previous paper one of us has introduced a function time dependent into the $g_{rr}$, besides the time dependent metric functions $g_{\theta\theta}$ and $g_{\phi\phi}$. The a... |
gr-qc/0309081 | Jacek Wi\'sniewski | B. Hartmann and J. Wisniewski | Generalised Wick Transform in Dimensionally Reduced Gravity | 25 pages, 3 figures, revtex4; v.2: referencing improved | Class.Quant.Grav. 21 (2004) 697-728 | 10.1088/0264-9381/21/2/024 | null | gr-qc | null | In the context of canonical quantum gravity, we study an alternative real
quantisation scheme, which is arising by relating simpler Riemannian quantum
theory to the more complicated physical Lorentzian theory - the generalised
Wick transform. On the symmetry reduced models, homogenous Bianchi cosmology
and 2+1 gravit... | [
{
"created": "Wed, 17 Sep 2003 10:09:59 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Sep 2003 09:21:44 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Hartmann",
"B.",
""
],
[
"Wisniewski",
"J.",
""
]
] | In the context of canonical quantum gravity, we study an alternative real quantisation scheme, which is arising by relating simpler Riemannian quantum theory to the more complicated physical Lorentzian theory - the generalised Wick transform. On the symmetry reduced models, homogenous Bianchi cosmology and 2+1 gravity,... |
1808.02728 | Hamed Pejhan | Hamed Pejhan, Kazuharu Bamba, Mohammad Enayati, and Surena
Rahbardehghan | A small non-vanishing cosmological constant from the Krein-Gupta-Bleuler
vacuum | 3 pages | Phys. Lett. B 785, 567 (2018) | 10.1016/j.physletb.2018.09.017 | FU-PCG-42 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We point out a potential relevance between the Krein-Gupta-Bleuler (KGB)
vacuum leading to a fully covariant quantum field theory for gravity in de
Sitter (dS) spacetime and the observable smallness of the cosmological
constant. This may provide a formulation of linear quantum gravity in a
framework amenable to devel... | [
{
"created": "Wed, 8 Aug 2018 11:39:43 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Sep 2018 10:08:09 GMT",
"version": "v2"
}
] | 2018-09-19 | [
[
"Pejhan",
"Hamed",
""
],
[
"Bamba",
"Kazuharu",
""
],
[
"Enayati",
"Mohammad",
""
],
[
"Rahbardehghan",
"Surena",
""
]
] | We point out a potential relevance between the Krein-Gupta-Bleuler (KGB) vacuum leading to a fully covariant quantum field theory for gravity in de Sitter (dS) spacetime and the observable smallness of the cosmological constant. This may provide a formulation of linear quantum gravity in a framework amenable to develop... |
2109.03832 | Alexander Grant | Alexander M. Grant and David A. Nichols | Persistent gravitational wave observables: Curve deviation in
asymptotically flat spacetimes | 22 pages; v2: fixed and added references, (more closely) matches
published version; v3: corrected typos in Eqs. (4.39a) and (4.40c) | Phys. Rev. D 105, 024056 (2022) | 10.1103/PhysRevD.105.024056 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the first paper in this series, a class of observables that generalized
the gravitational wave memory effect were introduced and given the name
"persistent gravitational wave observables." These observables are all nonlocal
in time, nonzero in spacetimes with gravitational radiation, and have an
observable effect ... | [
{
"created": "Wed, 8 Sep 2021 18:00:00 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Jan 2022 02:29:56 GMT",
"version": "v2"
},
{
"created": "Mon, 20 Mar 2023 02:41:09 GMT",
"version": "v3"
}
] | 2023-03-21 | [
[
"Grant",
"Alexander M.",
""
],
[
"Nichols",
"David A.",
""
]
] | In the first paper in this series, a class of observables that generalized the gravitational wave memory effect were introduced and given the name "persistent gravitational wave observables." These observables are all nonlocal in time, nonzero in spacetimes with gravitational radiation, and have an observable effect th... |
0904.2497 | Hakan Andreasson | Hakan Andreasson, Christian G. Boehmer | Bounds on M/R for static objects with a positive cosmological constant | 14 pages; Improvements and corrections, published version | Class.Quant.Grav.26:195007,2009 | 10.1088/0264-9381/26/19/195007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider spherically symmetric static solutions of the Einstein equations
with a positive cosmological constant $\Lambda,$ which are regular at the
centre, and we investigate the influence of $\Lambda$ on the bound of M/R,
where M is the ADM mass and R is the area radius of the boundary of the static
object. We fi... | [
{
"created": "Thu, 16 Apr 2009 14:14:46 GMT",
"version": "v1"
},
{
"created": "Wed, 29 Apr 2009 17:13:10 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Sep 2009 07:52:03 GMT",
"version": "v3"
}
] | 2009-09-23 | [
[
"Andreasson",
"Hakan",
""
],
[
"Boehmer",
"Christian G.",
""
]
] | We consider spherically symmetric static solutions of the Einstein equations with a positive cosmological constant $\Lambda,$ which are regular at the centre, and we investigate the influence of $\Lambda$ on the bound of M/R, where M is the ADM mass and R is the area radius of the boundary of the static object. We find... |
1709.04442 | Jorge P\'aramos | M. P. L. P. Ramos, J. P\'aramos | Baryogenesis in Nonminimally Coupled $f(R)$ Theories | 9 pages, 5 figures | Phys. Rev. D 96, 104024 (2017) | 10.1103/PhysRevD.96.104024 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize the mechanism for gravitational baryogensis in the context of
$f(R)$ theories of gravity, including a nonminimal coupling between curvature
and matter. In these models, the baryon asymmetry is generated through an
effective coupling between the Ricci scalar curvature and the net baryon
current that dyna... | [
{
"created": "Wed, 13 Sep 2017 17:38:38 GMT",
"version": "v1"
},
{
"created": "Sat, 18 Nov 2017 20:51:26 GMT",
"version": "v2"
}
] | 2017-11-22 | [
[
"Ramos",
"M. P. L. P.",
""
],
[
"Páramos",
"J.",
""
]
] | We generalize the mechanism for gravitational baryogensis in the context of $f(R)$ theories of gravity, including a nonminimal coupling between curvature and matter. In these models, the baryon asymmetry is generated through an effective coupling between the Ricci scalar curvature and the net baryon current that dynami... |
gr-qc/9802007 | B. Linet | B. Boisseau and B. Linet | Exact metric for the exterior of a global string in the Brans-Dicke
theory | 10 pages, latex, no figures | Gen.Rel.Grav. 30 (1998) 963-973 | 10.1023/A:1026668410756 | null | gr-qc | null | We determine in closed form the general static solution with cylindrical
symmetry to the Brans-Dicke equations for an energy-momentum tensor
corresponding to the one of the straight U(1) global string outside the core
radius assuming that the Goldstone boson field takes its asymptotic value
| [
{
"created": "Tue, 3 Feb 1998 14:26:31 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Boisseau",
"B.",
""
],
[
"Linet",
"B.",
""
]
] | We determine in closed form the general static solution with cylindrical symmetry to the Brans-Dicke equations for an energy-momentum tensor corresponding to the one of the straight U(1) global string outside the core radius assuming that the Goldstone boson field takes its asymptotic value |
1311.7674 | Lorenzo Iorio | Lorenzo Iorio | Commentary to "LARES successfully launched in orbit: Satellite and
mission description" by A. Paolozzi and I. Ciufolini | LaTex2e, 5 pages, no tables, no figures, 10 references | Acta Astronaut.95:174-175,2014 | 10.1016/j.actaastro.2013.11.010 | null | gr-qc astro-ph.EP physics.geo-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We comment on some statements in a recent paper by Paolozzi and Ciufolini
concerning certain remarks raised by us on the realistic accuracy obtainable in
testing the general relativistic Lense-Thirring effect in the gravitational
field of the Earth with the newly launched LARES satellite together with the
LAGEOS and ... | [
{
"created": "Wed, 27 Nov 2013 14:25:36 GMT",
"version": "v1"
}
] | 2013-12-02 | [
[
"Iorio",
"Lorenzo",
""
]
] | We comment on some statements in a recent paper by Paolozzi and Ciufolini concerning certain remarks raised by us on the realistic accuracy obtainable in testing the general relativistic Lense-Thirring effect in the gravitational field of the Earth with the newly launched LARES satellite together with the LAGEOS and LA... |
0912.4801 | Anil Yadav dr | Anil Kumar Yadav | Generation of Bianchi Type V String Cosmological Models with Bulk
Viscosity | 12 pages, 3 figures, Typose removed, To appear in Rom. Rep. Physics | Rom. Rep. Phys. 63: 862 - 878, 2011 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bianchi type V string cosmological models with bulk viscosity for massive
string are investigated. The bulk viscosity is assumed to vary with time in
such a manner that it is related to simple power function of the energy
density. Using generation technique (Camci~et~al., 2001), it is shown that
Einstein's field equa... | [
{
"created": "Thu, 24 Dec 2009 07:18:32 GMT",
"version": "v1"
},
{
"created": "Sat, 5 Feb 2011 15:15:21 GMT",
"version": "v2"
}
] | 2011-09-28 | [
[
"Yadav",
"Anil Kumar",
""
]
] | Bianchi type V string cosmological models with bulk viscosity for massive string are investigated. The bulk viscosity is assumed to vary with time in such a manner that it is related to simple power function of the energy density. Using generation technique (Camci~et~al., 2001), it is shown that Einstein's field equati... |
2212.05351 | Jean-Baptiste Bayle | Jean-Baptiste Bayle and Olaf Hartwig | Unified model for the LISA measurements and instrument simulations | 29 pages, 16 figures, 4 tables | Phys. Rev. D 107, 083019 (11 April 2023) | 10.1103/PhysRevD.107.083019 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | LISA is a space-based mHz gravitational-wave observatory, with a planned
launch in 2034. It is expected to be the first detector of its kind, and will
present unique challenges in instrumentation and data analysis. An accurate
preflight simulation of LISA data is a vital part of the development of both
the instrument... | [
{
"created": "Sat, 10 Dec 2022 19:00:30 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Feb 2023 15:13:34 GMT",
"version": "v2"
},
{
"created": "Wed, 29 Mar 2023 12:53:30 GMT",
"version": "v3"
}
] | 2023-04-18 | [
[
"Bayle",
"Jean-Baptiste",
""
],
[
"Hartwig",
"Olaf",
""
]
] | LISA is a space-based mHz gravitational-wave observatory, with a planned launch in 2034. It is expected to be the first detector of its kind, and will present unique challenges in instrumentation and data analysis. An accurate preflight simulation of LISA data is a vital part of the development of both the instrument a... |
2206.12074 | Shahar Hod | Shahar Hod | Spin-charge induced scalarization of Kerr-Newman black-hole spacetimes | 7 pages. Submitted on 14 Jun 2022 | JHEP 08 (2022) 272 | 10.1007/JHEP08(2022)272 | null | gr-qc astro-ph.HE hep-th | http://creativecommons.org/licenses/by/4.0/ | It has recently been demonstrated that Reissner-Nordstr\"om black holes in
composed Einstein-Maxwell-scalar field theories can support static scalar field
configurations with a non-minimal negative coupling to the Maxwell
electromagnetic invariant of the charged spacetime. We here reveal the
physically interesting fa... | [
{
"created": "Fri, 24 Jun 2022 04:39:58 GMT",
"version": "v1"
}
] | 2022-09-14 | [
[
"Hod",
"Shahar",
""
]
] | It has recently been demonstrated that Reissner-Nordstr\"om black holes in composed Einstein-Maxwell-scalar field theories can support static scalar field configurations with a non-minimal negative coupling to the Maxwell electromagnetic invariant of the charged spacetime. We here reveal the physically interesting fact... |
1804.09215 | T. Damour | Vasilisa Nikiforova and Thibault Damour | Infrared modified gravity with propagating torsion: instability of
torsionfull de Sitter-like solutions | 32 pages, 2 figures; four references added in the Introduction; more
explanations on the structure of the action of torsion gravity; additional
discussion of the crossing between the two branches of de Sitter-like
solutions; to be published in Phys. Rev. D | Phys. Rev. D 97, 124014 (2018) | 10.1103/PhysRevD.97.124014 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We continue the exploration of the consistency of a modified-gravity theory
that generalizes General Relativity by including a dynamical torsion in
addition to the dynamical metric. The six-parameter theory we consider was
found to be consistent around arbitrary torsionless Einstein backgrounds, in
spite of its conta... | [
{
"created": "Tue, 24 Apr 2018 19:02:20 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jun 2018 20:37:18 GMT",
"version": "v2"
}
] | 2018-06-13 | [
[
"Nikiforova",
"Vasilisa",
""
],
[
"Damour",
"Thibault",
""
]
] | We continue the exploration of the consistency of a modified-gravity theory that generalizes General Relativity by including a dynamical torsion in addition to the dynamical metric. The six-parameter theory we consider was found to be consistent around arbitrary torsionless Einstein backgrounds, in spite of its contain... |
1612.08715 | Jose Edgar Madriz Aguilar Dr. | Juan Antonio Nieto and Jos\'e Edgar Madriz Aguilar | Aspects of $(4+4)$-Kaluza-Klein type theory | 20 pages, no figures. Improved version | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We develop a type of Kaluza-Klein formalism in $(4+4)$-dimensions. In the
framework of this formalism we obtain a new kind of Schwarzschild metric
solutions that via Kruskal-Szequeres can be interpreted as mirror black and
white holes. We found that this new type of mirror black and white holes
solutions in $(3+1)$-d... | [
{
"created": "Tue, 27 Dec 2016 19:41:10 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Jul 2017 23:06:28 GMT",
"version": "v2"
},
{
"created": "Sun, 29 Oct 2017 22:54:05 GMT",
"version": "v3"
}
] | 2017-10-31 | [
[
"Nieto",
"Juan Antonio",
""
],
[
"Aguilar",
"José Edgar Madriz",
""
]
] | We develop a type of Kaluza-Klein formalism in $(4+4)$-dimensions. In the framework of this formalism we obtain a new kind of Schwarzschild metric solutions that via Kruskal-Szequeres can be interpreted as mirror black and white holes. We found that this new type of mirror black and white holes solutions in $(3+1)$-dim... |
1605.07649 | Benjamin Bahr | Benjamin Bahr, Sebastian Steinhaus | Numerical evidence for a phase transition in 4d spin foam quantum
gravity | 6 pages, 5 figures, changed to match published version | Phys. Rev. Lett. 117, 141302 (2016) | 10.1103/PhysRevLett.117.141302 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Building on recent advances in defining Wilsonian RG flows, and in particular
the notion of scales, for background-independent theories, we present a first
investigation of the renormalization of the 4d spin foam path integral for
quantum gravity, both analytically and numerically. Focussing on a specific
truncation ... | [
{
"created": "Tue, 24 May 2016 20:30:14 GMT",
"version": "v1"
},
{
"created": "Wed, 12 Oct 2016 15:07:10 GMT",
"version": "v2"
}
] | 2016-10-13 | [
[
"Bahr",
"Benjamin",
""
],
[
"Steinhaus",
"Sebastian",
""
]
] | Building on recent advances in defining Wilsonian RG flows, and in particular the notion of scales, for background-independent theories, we present a first investigation of the renormalization of the 4d spin foam path integral for quantum gravity, both analytically and numerically. Focussing on a specific truncation of... |
gr-qc/0602053 | Orhan Donmez | Orhan Donmez, Refik Kayali | Simulation of astrophysical jet using the special relativistic
hydrodynamics code | 9 figures | Appl.Math.Comput. 182 (2006) 1286-1298 | null | null | gr-qc | null | This paper describes a multidimensional hydrodynamic code which can be used
for the studies of relativistic astrophysical flows. The code solves the
special relativistic hydrodynamic equations as a hyperbolic system of
conservation laws based on High Resolution Shock Capturing (HRSC) Scheme. Two
standard tests, one o... | [
{
"created": "Tue, 14 Feb 2006 16:02:15 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Donmez",
"Orhan",
""
],
[
"Kayali",
"Refik",
""
]
] | This paper describes a multidimensional hydrodynamic code which can be used for the studies of relativistic astrophysical flows. The code solves the special relativistic hydrodynamic equations as a hyperbolic system of conservation laws based on High Resolution Shock Capturing (HRSC) Scheme. Two standard tests, one of ... |
gr-qc/9907091 | Jefferson Bjoraker | Yutaka Hosotani, Jefferson Bjoraker (Minnesota U) | Monople and dyon solutions in the Einstein Yang-Mills theory in
asymptotically AdS space | 6 pages, 2 figures. Proceedings from the talk given at "The eighth
Canadian Conference on General Relativity and Astrophysics", McGill
University, Montreal, Quebec, Canada, June 10-12 1999 | null | 10.1063/1.1301599 | UMN-TH-1810/99, NUC-MINN-99/13-T | gr-qc hep-ph hep-th | null | Regular monopole and dyon solutions to the SU(2) Einstein Yang-Mills
equations in asymptotically anti-de Sitter space are discussed. A class of
monopole solutions are shown to be stable against spherically symmetric linear
perturbations.
| [
{
"created": "Tue, 27 Jul 1999 20:04:00 GMT",
"version": "v1"
},
{
"created": "Mon, 9 Aug 1999 20:54:31 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Hosotani",
"Yutaka",
"",
"Minnesota U"
],
[
"Bjoraker",
"Jefferson",
"",
"Minnesota U"
]
] | Regular monopole and dyon solutions to the SU(2) Einstein Yang-Mills equations in asymptotically anti-de Sitter space are discussed. A class of monopole solutions are shown to be stable against spherically symmetric linear perturbations. |
2211.05148 | Chiara Mingarelli | Chiara M. F. Mingarelli and J. Andrew Casey-Clyde | Seeing the gravitational wave universe | invited Perspective for Science | Science, Vol 378, Issue 6620 (2022) | 10.1126/science.abq1187 | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Pulsar timing arrays will be a window into the gravitational wave background
| [
{
"created": "Wed, 9 Nov 2022 19:00:45 GMT",
"version": "v1"
}
] | 2022-11-14 | [
[
"Mingarelli",
"Chiara M. F.",
""
],
[
"Casey-Clyde",
"J. Andrew",
""
]
] | Pulsar timing arrays will be a window into the gravitational wave background |
2203.01938 | Gamal G.L. Nashed | G.G.L. Nashed, S.D. Odintsov and V.K. Oikonomou | Anisotropic compact stars in $D\rightarrow 4$ limit of Gauss-Bonnet
gravity | 24 pages, Latex, 5 figures, Accepted in Journal of Symmetry | null | null | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In the frame of Gauss-Bonnet gravity and in the limit of $D\to 4$, based on
the fact that spherically symmetric solution derived using any of
regularization schemes will be the same form as the original theory
\cite{Banerjee:2020yhu,Hennigar:2020lsl,Casalino:2020kbt,Aoki:2020lig}, we
derive a new interior spherically... | [
{
"created": "Thu, 3 Mar 2022 09:46:35 GMT",
"version": "v1"
}
] | 2022-03-07 | [
[
"Nashed",
"G. G. L.",
""
],
[
"Odintsov",
"S. D.",
""
],
[
"Oikonomou",
"V. K.",
""
]
] | In the frame of Gauss-Bonnet gravity and in the limit of $D\to 4$, based on the fact that spherically symmetric solution derived using any of regularization schemes will be the same form as the original theory \cite{Banerjee:2020yhu,Hennigar:2020lsl,Casalino:2020kbt,Aoki:2020lig}, we derive a new interior spherically s... |
gr-qc/0106061 | Michael T. Anderson | Michael T. Anderson (Stony Brook) | Remarks on evolution of space-times in 3+1 and 4+1 dimensions | 10pp, exposition improved; final version | Class.Quant.Grav. 18 (2001) 5199-5210 | 10.1088/0264-9381/18/23/313 | null | gr-qc math.DG | null | A large class of vacuum space-times is constructed in dimension 4+1 from
hyperboloidal initial data sets which are not small perturbations of empty
space data. These space-times are future geodesically complete, smooth up to
their future null infinity, and extend as vacuum space-times through their
Cauchy horizon. Di... | [
{
"created": "Wed, 20 Jun 2001 17:07:02 GMT",
"version": "v1"
},
{
"created": "Mon, 1 Oct 2001 17:01:10 GMT",
"version": "v2"
},
{
"created": "Tue, 23 Oct 2001 17:24:32 GMT",
"version": "v3"
}
] | 2009-11-07 | [
[
"Anderson",
"Michael T.",
"",
"Stony Brook"
]
] | A large class of vacuum space-times is constructed in dimension 4+1 from hyperboloidal initial data sets which are not small perturbations of empty space data. These space-times are future geodesically complete, smooth up to their future null infinity, and extend as vacuum space-times through their Cauchy horizon. Dime... |
2109.08145 | Hajime Sotani | Hajime Sotani and Bharat Kumar | Universal relations between the quasinormal modes of neutron star and
tidal deformability | null | null | null | RIKEN-iTHEMS-Report-21 | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | Universal relations independently of the equation of state (EOS) for neutron
star matter are valuable, if they exist, for extracting the neutron star
properties, which generally depend on the EOS. In this study, we newly derive
the universal relations predicting the gravitational wave frequencies for the
fundamental ... | [
{
"created": "Wed, 15 Sep 2021 06:30:28 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Nov 2021 23:58:16 GMT",
"version": "v2"
}
] | 2021-11-24 | [
[
"Sotani",
"Hajime",
""
],
[
"Kumar",
"Bharat",
""
]
] | Universal relations independently of the equation of state (EOS) for neutron star matter are valuable, if they exist, for extracting the neutron star properties, which generally depend on the EOS. In this study, we newly derive the universal relations predicting the gravitational wave frequencies for the fundamental ($... |
0802.3018 | Isabel Cordero-Carri\'on | I. Cordero-Carri\'on, J.M. Ib\'a\~nez, E. Gourgoulhon, J.L. Jaramillo
and J. Novak | Mathematical Issues in a Fully-Constrained Formulation of Einstein
Equations | 15 pages, no figures; typos added, references removed; Physical
Review D {\bf 77}, 084007 (2008) | Phys.Rev.D77:084007,2008 | 10.1103/PhysRevD.77.084007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Bonazzola, Gourgoulhon, Grandcl\'ement, and Novak [Phys. Rev. D {\bf 70},
104007 (2004)] proposed a new formulation for 3+1 numerical relativity.
Einstein equations result, according to that formalism, in a coupled
elliptic-hyperbolic system. We have carried out a preliminary analysis of the
mathematical structure of... | [
{
"created": "Thu, 21 Feb 2008 11:13:11 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Apr 2008 09:58:17 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Cordero-Carrión",
"I.",
""
],
[
"Ibáñez",
"J. M.",
""
],
[
"Gourgoulhon",
"E.",
""
],
[
"Jaramillo",
"J. L.",
""
],
[
"Novak",
"J.",
""
]
] | Bonazzola, Gourgoulhon, Grandcl\'ement, and Novak [Phys. Rev. D {\bf 70}, 104007 (2004)] proposed a new formulation for 3+1 numerical relativity. Einstein equations result, according to that formalism, in a coupled elliptic-hyperbolic system. We have carried out a preliminary analysis of the mathematical structure of t... |
gr-qc/0007085 | Gregory B. Cook | Gregory B. Cook | Initial Data for Numerical Relativity | 50 pages, LaTeX(livrev.cls), Review article for "Living Reviews in
Relativity" (http://www.livingreviews.org/), July 2000 | LivingRev.Rel.3:5,2000 | 10.12942/lrr-2000-5 | null | gr-qc | null | Initial data are the starting point for any numerical simulation. In the case
of numerical relativity, Einstein's equations constrain our choices of these
initial data. We will examine several of the formalisms used for specifying
Cauchy initial data in the 3+1 decomposition of Einstein's equations. We will
then expl... | [
{
"created": "Mon, 31 Jul 2000 16:28:49 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Cook",
"Gregory B.",
""
]
] | Initial data are the starting point for any numerical simulation. In the case of numerical relativity, Einstein's equations constrain our choices of these initial data. We will examine several of the formalisms used for specifying Cauchy initial data in the 3+1 decomposition of Einstein's equations. We will then explor... |
1110.2720 | Saeed Mirshekari | Saeed Mirshekari, Nicolas Yunes, Clifford M. Will | Constraining Lorentz-violating, Modified Dispersion Relations with
Gravitational Waves | 11 pages, 3 figures, 2 tables: title changed slightly, published
version | Phys. Rev. D85: 024041, 2012 | 10.1103/PhysRevD.85.024041 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modified gravity theories generically predict a violation of Lorentz
invariance, which may lead to a modified dispersion relation for propagating
modes of gravitational waves. We construct a parametrized dispersion relation
that can reproduce a range of known Lorentz-violating predictions and
investigate their impact... | [
{
"created": "Wed, 12 Oct 2011 17:59:16 GMT",
"version": "v1"
},
{
"created": "Sat, 29 Nov 2014 14:55:44 GMT",
"version": "v2"
}
] | 2014-12-02 | [
[
"Mirshekari",
"Saeed",
""
],
[
"Yunes",
"Nicolas",
""
],
[
"Will",
"Clifford M.",
""
]
] | Modified gravity theories generically predict a violation of Lorentz invariance, which may lead to a modified dispersion relation for propagating modes of gravitational waves. We construct a parametrized dispersion relation that can reproduce a range of known Lorentz-violating predictions and investigate their impact o... |
gr-qc/0507084 | Filimonova Irina V | S.S. Gershtein, A.A.Logunov and M.A. Mestvirishvili | The Field Theory of Gravitation and The Rest Mass of Particles | 4 pages | Dokl.Phys.50:632-633,2005; Dokl.Akad.Nauk Ser.Fiz.50:753-754,2005 | 10.1134/1.2158010 | null | gr-qc | null | It is shown in this work that all free physical fields should have a nonzero
rest mass according to the field theory of gravitation.
| [
{
"created": "Tue, 19 Jul 2005 08:00:44 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Gershtein",
"S. S.",
""
],
[
"Logunov",
"A. A.",
""
],
[
"Mestvirishvili",
"M. A.",
""
]
] | It is shown in this work that all free physical fields should have a nonzero rest mass according to the field theory of gravitation. |
0907.2569 | Reinhard Prix | Reinhard Prix, Badri Krishnan | Targeted search for continuous gravitational waves: Bayesian versus
maximum-likelihood statistics | 12 pages, presented at GWDAW13, to appear in CQG | null | 10.1088/0264-9381/26/20/204013 | LIGO-P0900066-v2 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the Bayesian framework for detection of continuous
gravitational waves (GWs) in the context of targeted searches, where the phase
evolution of the GW signal is assumed to be known, while the four amplitude
parameters are unknown. We show that the orthodox maximum-likelihood statistic
(known as F-statis... | [
{
"created": "Wed, 15 Jul 2009 12:17:59 GMT",
"version": "v1"
}
] | 2015-05-13 | [
[
"Prix",
"Reinhard",
""
],
[
"Krishnan",
"Badri",
""
]
] | We investigate the Bayesian framework for detection of continuous gravitational waves (GWs) in the context of targeted searches, where the phase evolution of the GW signal is assumed to be known, while the four amplitude parameters are unknown. We show that the orthodox maximum-likelihood statistic (known as F-statisti... |
1102.2513 | Victor Shchigolev Konstantinovich | V.K. Shchigolev | Modelling Cosmic Acceleration in Modified Yang - Mills Theory | 5 pages | Grav.Cosmol.17:272-275,2011 | 10.1134/S0202289311030078 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the possibility that the modified Yang-Mills theories can
produce an accelerated cosmic expansion. We take into account some specific
non-trivial solution of the modified Yang-Mills equation obtained by the author
earlier, which allows us to build several modifications of accelerated cosmic
expansion.
| [
{
"created": "Sat, 12 Feb 2011 14:18:05 GMT",
"version": "v1"
},
{
"created": "Wed, 16 Feb 2011 10:10:43 GMT",
"version": "v2"
},
{
"created": "Fri, 18 Feb 2011 11:13:21 GMT",
"version": "v3"
}
] | 2011-08-19 | [
[
"Shchigolev",
"V. K.",
""
]
] | We investigate the possibility that the modified Yang-Mills theories can produce an accelerated cosmic expansion. We take into account some specific non-trivial solution of the modified Yang-Mills equation obtained by the author earlier, which allows us to build several modifications of accelerated cosmic expansion. |
1504.01827 | Cosimo Bambi | Cosimo Bambi, Gonzalo J. Olmo, D. Rubiera-Garcia | Melvin Universe in Born-Infeld gravity | 6 pages, 1 figure | Phys. Rev. D 91, 104010 (2015) | 10.1103/PhysRevD.91.104010 | IFIC/15-58 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a magnetic flux pointing in the $z$ direction of an axially
symmetric space-time (Melvin Universe) in a Born-Infeld-type extension of
General Relativity (GR) formulated in the Palatini approach. Large magnetic
fields could have been produced in the early Universe, and given rise to
interesting phenomenolo... | [
{
"created": "Wed, 8 Apr 2015 04:31:44 GMT",
"version": "v1"
}
] | 2015-07-31 | [
[
"Bambi",
"Cosimo",
""
],
[
"Olmo",
"Gonzalo J.",
""
],
[
"Rubiera-Garcia",
"D.",
""
]
] | We consider a magnetic flux pointing in the $z$ direction of an axially symmetric space-time (Melvin Universe) in a Born-Infeld-type extension of General Relativity (GR) formulated in the Palatini approach. Large magnetic fields could have been produced in the early Universe, and given rise to interesting phenomenology... |
1306.3021 | George F. R. Ellis | George F R Ellis | The Trace-Free Einstein Equations and inflation | 12 pages. Version accepted by GRG Journal. New section added on
relation of present and inflationary values | null | 10.1007/s10714-013-1619-5 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The trace-free version of the Einstein Gravitational equations, essentially
equivalent to unimodular gravity, can solve the troubling issue of the huge
discrepancy between quantum field theory estimates of the vacuum energy density
and the astronomically observed value of the cosmological constant. However it
has bee... | [
{
"created": "Thu, 13 Jun 2013 04:28:16 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jun 2013 07:10:18 GMT",
"version": "v2"
},
{
"created": "Thu, 17 Oct 2013 17:19:01 GMT",
"version": "v3"
}
] | 2014-12-31 | [
[
"Ellis",
"George F R",
""
]
] | The trace-free version of the Einstein Gravitational equations, essentially equivalent to unimodular gravity, can solve the troubling issue of the huge discrepancy between quantum field theory estimates of the vacuum energy density and the astronomically observed value of the cosmological constant. However it has been ... |
gr-qc/9806045 | Winfried Zimdahl | Winfried Zimdahl | Covariant cosmological perturbation dynamics in the inflationary
universe | 8 pages, latex, uses sprocl.sty. To appear in the Proceedings of the
International Seminar on Mathematical Cosmology, Potsdam, Mar 29 - Apr 4,
1998, ed. H.-J. Schmidt and M. Rainer. World Scientific, Singapore | null | null | null | gr-qc | null | The linear cosmological perturbation theory of almost homogeneous and
isotropic perfect fluid and scalar field universes is reconsidered and formally
simplified. Using the existence of a covariant conserved quantity on large
perturbation scales, a closed integral expression for comoving energy density
perturbations i... | [
{
"created": "Tue, 9 Jun 1998 13:31:32 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Zimdahl",
"Winfried",
""
]
] | The linear cosmological perturbation theory of almost homogeneous and isotropic perfect fluid and scalar field universes is reconsidered and formally simplified. Using the existence of a covariant conserved quantity on large perturbation scales, a closed integral expression for comoving energy density perturbations is ... |
1302.1781 | Aldo Riello | Aldo Riello | Self-Energy of the Lorentzian EPRL-FK Spin Foam Model of Quantum Gravity | 58 pages, 8 figures. Corrections about the degenerate sector
(suppression of a paragraph, introduction of a new appendix), plus minor
corrections and improvements in the introduction and in the conclusions | Phys. Rev. D 88, 024011 (2013) [30 pages] | 10.1103/PhysRevD.88.024011 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the most divergent contribution to the non-degenerate sector of
the self-energy (or "melonic") graph in the context of the Lorentzian EPRL-FK
Spin Foam model of Quantum Gravity. We find that such a contribution is
logarithmically divergent in the cut-off over the SU(2)-representation spins
when one choos... | [
{
"created": "Thu, 7 Feb 2013 15:41:43 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Mar 2013 11:25:26 GMT",
"version": "v2"
}
] | 2013-07-16 | [
[
"Riello",
"Aldo",
""
]
] | We calculate the most divergent contribution to the non-degenerate sector of the self-energy (or "melonic") graph in the context of the Lorentzian EPRL-FK Spin Foam model of Quantum Gravity. We find that such a contribution is logarithmically divergent in the cut-off over the SU(2)-representation spins when one chooses... |
2111.07319 | Yosef Verbin | D. Polarski, A. A. Starobinsky, Y. Verbin | Bouncing Cosmological Isotropic Solutions in Scalar-Tensor Gravity | 22 pages; few misprints corrected, accepted for publication in JCAP | JCAP 01 (2022) 052 | 10.1088/1475-7516/2022/01/052 | null | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | Bouncing non-singular isotropic cosmological solutions are investigated in a
simple model of scalar-tensor gravity. New families of such solutions are found
and their properties are presented and analyzed using an effective potential as
the main tool. Bouncing solutions are shown to exist for a Higgs-like
self-intera... | [
{
"created": "Sun, 14 Nov 2021 11:44:24 GMT",
"version": "v1"
},
{
"created": "Wed, 26 Jan 2022 11:59:54 GMT",
"version": "v2"
}
] | 2022-01-28 | [
[
"Polarski",
"D.",
""
],
[
"Starobinsky",
"A. A.",
""
],
[
"Verbin",
"Y.",
""
]
] | Bouncing non-singular isotropic cosmological solutions are investigated in a simple model of scalar-tensor gravity. New families of such solutions are found and their properties are presented and analyzed using an effective potential as the main tool. Bouncing solutions are shown to exist for a Higgs-like self-interact... |
1705.04023 | Wlodzimierz Piechocki | Andrzej G\'o\'zd\'z, W{\l}odzimierz Piechocki, and Grzegorz Plewa | Dynamical structures specific to strong gravitational field: Quantum
formalism | 22 pages, no figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of the general Bianchi IX spacetime, near the gravitational
singularity, underlies the Belinskii, Khalatnikov and Lifshitz scenario.
Asymptotically, near the singularity, the oscillations of the directional scale
factors (defining the spacetime metric) are freezed so the evolution of the
Bianchi IX model... | [
{
"created": "Thu, 11 May 2017 05:54:56 GMT",
"version": "v1"
}
] | 2017-05-12 | [
[
"Góźdź",
"Andrzej",
""
],
[
"Piechocki",
"Włodzimierz",
""
],
[
"Plewa",
"Grzegorz",
""
]
] | The dynamics of the general Bianchi IX spacetime, near the gravitational singularity, underlies the Belinskii, Khalatnikov and Lifshitz scenario. Asymptotically, near the singularity, the oscillations of the directional scale factors (defining the spacetime metric) are freezed so the evolution of the Bianchi IX model i... |
1307.4195 | Elias C. Vagenas | Bibhas Ranjan Majhi, Elias C. Vagenas | Modified Dispersion Relation, Photon's Velocity, and Unruh Effect | v1: 11 pages, LaTeX, no figures; v2: a typo corrected and references
added to match published version in Phys. Lett. B | Phys. Lett. B 725 (2013) 477 | 10.1016/j.physletb.2013.07.039 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Motivated by the recently derived new form of generalized uncertainty
principle we obtain the corresponding dispersion relation which is now
modified. This modification can be interpreted as a possible mechanism that
makes particles more massive. In addition, the modified velocity of photons is
obtained and indicates... | [
{
"created": "Tue, 16 Jul 2013 08:26:00 GMT",
"version": "v1"
},
{
"created": "Fri, 26 Jul 2013 08:59:13 GMT",
"version": "v2"
}
] | 2013-08-21 | [
[
"Majhi",
"Bibhas Ranjan",
""
],
[
"Vagenas",
"Elias C.",
""
]
] | Motivated by the recently derived new form of generalized uncertainty principle we obtain the corresponding dispersion relation which is now modified. This modification can be interpreted as a possible mechanism that makes particles more massive. In addition, the modified velocity of photons is obtained and indicates t... |
2310.03719 | Michael Werner | Michael Werner, Philip K. Schwartz, Jan-Niclas Kirsten-Siem{\ss},
Naceur Gaaloul, Domenico Giulini and Klemens Hammerer | Atom interferometers in weakly curved spacetimes using Bragg diffraction
and Bloch oscillations | 22 pages, 3 figures, 4 tables | Phys. Rev. D 109, 022008 (2024) | 10.1103/PhysRevD.109.022008 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a systematic approach to determine all relativistic phases up to
$\mathcal{O}(c^{-2})$ in light-pulse atom interferometers in weakly curved
spacetime that are based on elastic scattering, namely Bragg diffraction and
Bloch oscillations. Our analysis is derived from first principles using the
parameterized ... | [
{
"created": "Thu, 5 Oct 2023 17:39:53 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Feb 2024 13:30:21 GMT",
"version": "v2"
}
] | 2024-02-08 | [
[
"Werner",
"Michael",
""
],
[
"Schwartz",
"Philip K.",
""
],
[
"Kirsten-Siemß",
"Jan-Niclas",
""
],
[
"Gaaloul",
"Naceur",
""
],
[
"Giulini",
"Domenico",
""
],
[
"Hammerer",
"Klemens",
""
]
] | We present a systematic approach to determine all relativistic phases up to $\mathcal{O}(c^{-2})$ in light-pulse atom interferometers in weakly curved spacetime that are based on elastic scattering, namely Bragg diffraction and Bloch oscillations. Our analysis is derived from first principles using the parameterized po... |
gr-qc/0404119 | Dirk Puetzfeld | Dirk Puetzfeld | Status of non-Riemannian cosmology | 10 pages, 1 figure, to appear in the proceedings of the 6th UCLA
Symposium on ''Sources and Detection of Dark Matter and Dark Energy in the
Universe'', 4 references added, minor typos fixed | New Astron.Rev. 49 (2005) 59-64 | 10.1016/j.newar.2005.01.022 | null | gr-qc astro-ph | null | We provide a brief chronological guide to the literature on non-Riemannian
cosmological models. Developments in this field are traced back to the early
seventies and are given in table form.
| [
{
"created": "Wed, 28 Apr 2004 20:48:35 GMT",
"version": "v1"
},
{
"created": "Wed, 26 May 2004 17:58:33 GMT",
"version": "v2"
}
] | 2009-04-03 | [
[
"Puetzfeld",
"Dirk",
""
]
] | We provide a brief chronological guide to the literature on non-Riemannian cosmological models. Developments in this field are traced back to the early seventies and are given in table form. |
2008.06071 | Niels Warburton | Alvin J. K. Chua, Michael L. Katz, Niels Warburton, Scott A. Hughes | Rapid generation of fully relativistic extreme-mass-ratio-inspiral
waveform templates for LISA data analysis | 6 pages, 3 figures | Phys. Rev. Lett. 126, 051102 (2021) | 10.1103/PhysRevLett.126.051102 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The future space mission LISA will observe a wealth of gravitational-wave
sources at millihertz frequencies. Of these, the extreme-mass-ratio inspirals
of compact objects into massive black holes are the only sources that combine
the challenges of strong-field complexity with that of long-lived signals. Such
signals ... | [
{
"created": "Thu, 13 Aug 2020 18:15:06 GMT",
"version": "v1"
}
] | 2021-02-08 | [
[
"Chua",
"Alvin J. K.",
""
],
[
"Katz",
"Michael L.",
""
],
[
"Warburton",
"Niels",
""
],
[
"Hughes",
"Scott A.",
""
]
] | The future space mission LISA will observe a wealth of gravitational-wave sources at millihertz frequencies. Of these, the extreme-mass-ratio inspirals of compact objects into massive black holes are the only sources that combine the challenges of strong-field complexity with that of long-lived signals. Such signals ar... |
2406.11305 | Gang Wang | Gang Wang | Enhancing noise characterization with robust time delay interferometry
combination | 13 pages, 12 figures | null | null | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Time delay interferometry (TDI) is essential for suppressing laser frequency
noise and achieving the targeted sensitivity for space-borne gravitational wave
(GW) missions. In Paper I, we examined the performance of the fiducial
second-generation TDI Michelson configuration versus an alternative, the hybrid
Relay, in ... | [
{
"created": "Mon, 17 Jun 2024 08:11:26 GMT",
"version": "v1"
},
{
"created": "Tue, 18 Jun 2024 11:05:42 GMT",
"version": "v2"
},
{
"created": "Mon, 29 Jul 2024 14:14:23 GMT",
"version": "v3"
}
] | 2024-07-30 | [
[
"Wang",
"Gang",
""
]
] | Time delay interferometry (TDI) is essential for suppressing laser frequency noise and achieving the targeted sensitivity for space-borne gravitational wave (GW) missions. In Paper I, we examined the performance of the fiducial second-generation TDI Michelson configuration versus an alternative, the hybrid Relay, in no... |
gr-qc/0302080 | Pawel Nurowski | Carlos Kozameh, Ezra T Newman, Pawel Nurowski | Conformal Einstein equations and Cartan conformal connection | null | Class.Quant.Grav. 20 (2003) 3029-3036 | 10.1088/0264-9381/20/14/305 | null | gr-qc | null | Necessary and sufficient conditions for a space-time to be conformal to an
Einstein space-time are interpreted in terms of curvature restrictions for the
corresponding Cartan conformal connection.
| [
{
"created": "Wed, 19 Feb 2003 20:29:35 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Kozameh",
"Carlos",
""
],
[
"Newman",
"Ezra T",
""
],
[
"Nurowski",
"Pawel",
""
]
] | Necessary and sufficient conditions for a space-time to be conformal to an Einstein space-time are interpreted in terms of curvature restrictions for the corresponding Cartan conformal connection. |
1602.00121 | Thomas Buchert | Fosca Al Roumi and Thomas Buchert | Relativistic structure formation models and gravitoelectromagnetism | 6 pages; contribution to the proceedings of MG14, Parallel Session
DE3 | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the framework of Lagrangian perturbation theory in general relativity we
discuss the possibility to split the Einstein equations, written in terms of
spatial Cartan coframes within a 3+1 foliation of spacetime, into
gravitoelectric and gravitomagnetic parts. While the former reproduces the full
hierarchy of the Ne... | [
{
"created": "Sat, 30 Jan 2016 13:54:17 GMT",
"version": "v1"
}
] | 2016-02-02 | [
[
"Roumi",
"Fosca Al",
""
],
[
"Buchert",
"Thomas",
""
]
] | In the framework of Lagrangian perturbation theory in general relativity we discuss the possibility to split the Einstein equations, written in terms of spatial Cartan coframes within a 3+1 foliation of spacetime, into gravitoelectric and gravitomagnetic parts. While the former reproduces the full hierarchy of the Newt... |
1006.5363 | Jian-Yang Zhu | Li-Fang Li and Jian-Yang Zhu | Stochastic resonance with matched filtering | 5 pages, 3 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Along with the development of interferometric gravitational wave detector, we
enter into an epoch of gravitational wave astronomy, which will open a brand
new window for astrophysics to observe our universe. Almost all of the data
analysis methods in gravitational wave detection are based on matched
filtering. Gravit... | [
{
"created": "Mon, 28 Jun 2010 14:30:05 GMT",
"version": "v1"
}
] | 2010-06-29 | [
[
"Li",
"Li-Fang",
""
],
[
"Zhu",
"Jian-Yang",
""
]
] | Along with the development of interferometric gravitational wave detector, we enter into an epoch of gravitational wave astronomy, which will open a brand new window for astrophysics to observe our universe. Almost all of the data analysis methods in gravitational wave detection are based on matched filtering. Gravitat... |
1707.05463 | Kiyoshi Shiraishi | Takuya Maki and Kiyoshi Shiraishi | Motion of Test Particles around a Charged Dilatonic Black Hole | 12 pages, no figure | Classical and Quantum Gravity 11, No. 1, pp.227-237 (1994) | 10.1088/0264-9381/11/1/022 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examine motion of test particles with various masses, electric charges and
dilatonic charges in a background metric and fields of a charged dilatonic
black hole.
| [
{
"created": "Tue, 18 Jul 2017 04:29:37 GMT",
"version": "v1"
}
] | 2017-07-19 | [
[
"Maki",
"Takuya",
""
],
[
"Shiraishi",
"Kiyoshi",
""
]
] | We examine motion of test particles with various masses, electric charges and dilatonic charges in a background metric and fields of a charged dilatonic black hole. |
2302.09711 | Teagan Clarke | Teagan A. Clarke, Lani Chastain, Paul D. Lasky, Eric Thrane | Nuclear physics with gravitational waves from neutron stars disrupted by
black holes | 10 pages, 6 figures. Accepted in ApJL | null | 10.3847/2041-8213/acd33b | null | gr-qc astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waves from neutron star-black hole (NSBH) mergers that undergo
tidal disruption provide a potential avenue to study the equation of state of
neutron stars and hence the behaviour of matter at its most extreme densities.
We present a phenomenological model for the gravitational-wave signature of
tidal di... | [
{
"created": "Mon, 20 Feb 2023 01:21:54 GMT",
"version": "v1"
},
{
"created": "Tue, 9 May 2023 07:20:53 GMT",
"version": "v2"
}
] | 2023-05-31 | [
[
"Clarke",
"Teagan A.",
""
],
[
"Chastain",
"Lani",
""
],
[
"Lasky",
"Paul D.",
""
],
[
"Thrane",
"Eric",
""
]
] | Gravitational waves from neutron star-black hole (NSBH) mergers that undergo tidal disruption provide a potential avenue to study the equation of state of neutron stars and hence the behaviour of matter at its most extreme densities. We present a phenomenological model for the gravitational-wave signature of tidal disr... |
1807.04843 | Mehrdad Mirbabayi | Mehrdad Mirbabayi | The Quasinormal Modes of Quasinormal Modes | JCAP version. 3 pages | null | 10.1088/1475-7516/2020/01/052 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Modifying black hole horizon can drastically change the spectrum of
quasinormal modes. But if the modification is close enough to the horizon the
ringdown signal remains almost unaltered, and well described by the quasinormal
modes of the original GR solution. I show how the original quasinormal modes
emerge in the s... | [
{
"created": "Thu, 12 Jul 2018 21:58:37 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Jan 2019 19:01:20 GMT",
"version": "v2"
},
{
"created": "Mon, 11 May 2020 00:39:29 GMT",
"version": "v3"
}
] | 2020-05-12 | [
[
"Mirbabayi",
"Mehrdad",
""
]
] | Modifying black hole horizon can drastically change the spectrum of quasinormal modes. But if the modification is close enough to the horizon the ringdown signal remains almost unaltered, and well described by the quasinormal modes of the original GR solution. I show how the original quasinormal modes emerge in the sum... |
2103.11156 | Vasilisa Nikiforova | Vasilisa Nikiforova | Spherically symmetric perturbations of a Schwarzschild black hole in
torsion bigravity | 15 pages, 2 figures, 1 Mathematica notebook as ancillary file | Phys. Rev. D 104, 024032 (2021) | 10.1103/PhysRevD.104.024032 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Time-dependent spherically-symmetric perturbations of Schwarzschild black
holes are studied within torsion bigravity, i.e., within generalized
Einstein-Cartan theories where the dynamical torsion carries massive spin-2
excitation. We reduce linearized perturbations to a Zerilli-like equation. The
structure of the pot... | [
{
"created": "Sat, 20 Mar 2021 11:27:46 GMT",
"version": "v1"
}
] | 2021-07-21 | [
[
"Nikiforova",
"Vasilisa",
""
]
] | Time-dependent spherically-symmetric perturbations of Schwarzschild black holes are studied within torsion bigravity, i.e., within generalized Einstein-Cartan theories where the dynamical torsion carries massive spin-2 excitation. We reduce linearized perturbations to a Zerilli-like equation. The structure of the poten... |
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