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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2401.11416 | Shuo Sun | Shuo Sun, Changfu Shi, Jian-dong Zhang, Jianwei Mei | Bayesian analysis of gravitational wave memory effect with TianQin | null | null | null | null | gr-qc astro-ph.IM | http://creativecommons.org/licenses/by/4.0/ | The memory effect in gravitational waves is a direct prediction of general
relativity. The presence of the memory effect in gravitational wave signals not
only serves as a test for general relativity but also establishes connections
between soft theorem, and asymptotic symmetries, serving as a bridge for
exploring fu... | [
{
"created": "Sun, 21 Jan 2024 07:10:33 GMT",
"version": "v1"
}
] | 2024-01-23 | [
[
"Sun",
"Shuo",
""
],
[
"Shi",
"Changfu",
""
],
[
"Zhang",
"Jian-dong",
""
],
[
"Mei",
"Jianwei",
""
]
] | The memory effect in gravitational waves is a direct prediction of general relativity. The presence of the memory effect in gravitational wave signals not only serves as a test for general relativity but also establishes connections between soft theorem, and asymptotic symmetries, serving as a bridge for exploring fund... |
0901.3829 | Babak Vakili | H.R. Sepangi, B. Shakerin and B. Vakili | Deformed phase space in a two dimensional minisuperspace model | 20 pages, 7 figures + 4 contourplots, to appear in CQG | Class.Quant.Grav.26:065003,2009 | 10.1088/0264-9381/26/6/065003 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the effects of noncommutativity and deformed Heisenberg algebra on
the evolution of a two dimensional minisuperspace cosmological model in
classical and quantum regimes. The phase space variables turn out to correspond
to the scale factor of a flat FRW model with a positive cosmological constant
and a dilato... | [
{
"created": "Sat, 24 Jan 2009 12:31:37 GMT",
"version": "v1"
}
] | 2009-04-08 | [
[
"Sepangi",
"H. R.",
""
],
[
"Shakerin",
"B.",
""
],
[
"Vakili",
"B.",
""
]
] | We study the effects of noncommutativity and deformed Heisenberg algebra on the evolution of a two dimensional minisuperspace cosmological model in classical and quantum regimes. The phase space variables turn out to correspond to the scale factor of a flat FRW model with a positive cosmological constant and a dilatoni... |
gr-qc/0304103 | Grigori Volovik | G.E. Volovik | Vacuum energy and Universe in special relativity | LaTeX file, 7 pages, no figures, to appear in JETP Letters, reference
is added | JETP Lett. 77 (2003) 639-641; Pisma Zh.Eksp.Teor.Fiz. 77 (2003)
769-771 | 10.1134/1.1604411 | null | gr-qc cond-mat hep-ph | null | The problem of cosmological constant and vacuum energy is usually thought of
as the subject of general relativity. However, the vacuum energy is important
for the Universe even in the absence of gravity, i.e. in the case when the
Newton constant G is exactly zero, G=0. We discuss the response of the vacuum
energy to ... | [
{
"created": "Tue, 29 Apr 2003 15:18:09 GMT",
"version": "v1"
},
{
"created": "Wed, 21 May 2003 12:39:17 GMT",
"version": "v2"
},
{
"created": "Mon, 9 Jun 2003 11:41:17 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Volovik",
"G. E.",
""
]
] | The problem of cosmological constant and vacuum energy is usually thought of as the subject of general relativity. However, the vacuum energy is important for the Universe even in the absence of gravity, i.e. in the case when the Newton constant G is exactly zero, G=0. We discuss the response of the vacuum energy to th... |
2008.01426 | Naveena Kumara A | C.L. Ahmed Rizwan, A. Naveena Kumara, Kartheek Hegde, Md Sabir Ali,
Ajith K.M | Rotating Black Hole with an Anisotropic Matter Field as a Particle
Accelerator | 22 pages, 7 figures | Classical and Quantum Gravity, 2021 | 10.1088/1361-6382/abe2d9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, a generalised solution for Einstein equations of a rotating compact
body, surrounded by matter field was proposed, which is the Kerr-Newman
spacetime with an anisotropic matter. The solution possesses an additional
hair, along with the conventional mass, charge and spin, which arises from the
negative radia... | [
{
"created": "Tue, 4 Aug 2020 09:16:42 GMT",
"version": "v1"
}
] | 2021-03-12 | [
[
"Rizwan",
"C. L. Ahmed",
""
],
[
"Kumara",
"A. Naveena",
""
],
[
"Hegde",
"Kartheek",
""
],
[
"Ali",
"Md Sabir",
""
],
[
"M",
"Ajith K.",
""
]
] | Recently, a generalised solution for Einstein equations of a rotating compact body, surrounded by matter field was proposed, which is the Kerr-Newman spacetime with an anisotropic matter. The solution possesses an additional hair, along with the conventional mass, charge and spin, which arises from the negative radial ... |
gr-qc/0003060 | Jong Hyuk Yoon | J.H. Yoon (Department of Physics, Konkuk University, Seoul, Korea) | (2,2)-Formalism of General Relativity: An Exact Solution | 2 figures included, IOP style file needed | Class.Quant.Grav.16:1863-1871,1999 | 10.1088/0264-9381/16/6/319 | null | gr-qc | null | I discuss the (2,2)-formalism of general relativity based on the
(2,2)-fibration of a generic 4-dimensional spacetime of the Lorentzian
signature. In this formalism general relativity is describable as a Yang-Mills
gauge theory defined on the (1+1)-dimensional base manifold, whose local gauge
symmetry is the group of... | [
{
"created": "Wed, 15 Mar 2000 08:52:50 GMT",
"version": "v1"
}
] | 2010-11-19 | [
[
"Yoon",
"J. H.",
"",
"Department of Physics, Konkuk University, Seoul, Korea"
]
] | I discuss the (2,2)-formalism of general relativity based on the (2,2)-fibration of a generic 4-dimensional spacetime of the Lorentzian signature. In this formalism general relativity is describable as a Yang-Mills gauge theory defined on the (1+1)-dimensional base manifold, whose local gauge symmetry is the group of t... |
gr-qc/9806068 | Jonathan Wilson | J. A. Vickers, J. P. Wilson | Invariance of the distributional curvature of the cone under smooth
diffeomorphisms | 8 pages, AMS-TeX | Class.Quant.Grav. 16 (1999) 579-588 | 10.1088/0264-9381/16/2/019 | null | gr-qc | null | An explicit calculation is carried out to show that the distributional
curvature of a 2-cone, calculated by Clarke et al. (1996), using Colombeau's
new generalised functions is invariant under non-linear $C^\infty$ coordinate
transformations.
| [
{
"created": "Tue, 16 Jun 1998 09:27:07 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Vickers",
"J. A.",
""
],
[
"Wilson",
"J. P.",
""
]
] | An explicit calculation is carried out to show that the distributional curvature of a 2-cone, calculated by Clarke et al. (1996), using Colombeau's new generalised functions is invariant under non-linear $C^\infty$ coordinate transformations. |
gr-qc/0508039 | Alan Coley | B. J. Carr and A. A. Coley | The Similarity Hypothesis in General Relativity | to be submitted to Gen. Rel. Grav | Gen.Rel.Grav.37:2165-2188,2005 | 10.1007/s10714-005-0196-7 | null | gr-qc astro-ph | null | Self-similar models are important in general relativity and other fundamental
theories. In this paper we shall discuss the ``similarity hypothesis'', which
asserts that under a variety of physical circumstances solutions of these
theories will naturally evolve to a self-similar form. We will find there is
good eviden... | [
{
"created": "Wed, 10 Aug 2005 14:00:34 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Dec 2005 18:43:03 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Carr",
"B. J.",
""
],
[
"Coley",
"A. A.",
""
]
] | Self-similar models are important in general relativity and other fundamental theories. In this paper we shall discuss the ``similarity hypothesis'', which asserts that under a variety of physical circumstances solutions of these theories will naturally evolve to a self-similar form. We will find there is good evidence... |
1801.07306 | Maulik K. Parikh | Maulik Parikh, Sudipta Sarkar, and Andrew Svesko | A Local First Law of Gravity | 6 pages, 1 figure, LaTeX | Phys. Rev. D 101, 104043 (2020) | 10.1103/PhysRevD.101.104043 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We find a (quasi-)local first law of thermodynamics, $\Delta E = T \Delta S -
W$, connecting gravitational entropy, $S$, with matter energy and work. For
Einstein gravity $S$ is the Bekenstein-Hawking entropy, while for general
theories of gravity $S$ is the Wald entropy, evaluated on the stretched future
light cone ... | [
{
"created": "Mon, 22 Jan 2018 20:24:50 GMT",
"version": "v1"
},
{
"created": "Fri, 13 Nov 2020 06:21:18 GMT",
"version": "v2"
}
] | 2020-11-16 | [
[
"Parikh",
"Maulik",
""
],
[
"Sarkar",
"Sudipta",
""
],
[
"Svesko",
"Andrew",
""
]
] | We find a (quasi-)local first law of thermodynamics, $\Delta E = T \Delta S - W$, connecting gravitational entropy, $S$, with matter energy and work. For Einstein gravity $S$ is the Bekenstein-Hawking entropy, while for general theories of gravity $S$ is the Wald entropy, evaluated on the stretched future light cone of... |
2202.00010 | Kimet Jusufi | Kimet Jusufi | Black holes surrounded by Einstein clusters as models of dark matter
fluid | 11 pages, 6 figures. Accepted for publication in EPJC | Eur. Phys. J. C 83, 103 (2023) | 10.1140/epjc/s10052-023-11264-w | null | gr-qc astro-ph.GA astro-ph.HE | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a novel class of spherically symmetric and asymptotically flat
black holes and naked singularities surrounded by anisotropic dark matter fluid
with the equation of state (EoS) of the form $P_t=\omega \rho$. We assume that
dark matter is made of weakly interacting particles orbiting around the
supermassiv... | [
{
"created": "Mon, 31 Jan 2022 15:48:23 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Feb 2022 12:56:14 GMT",
"version": "v2"
},
{
"created": "Sun, 22 Jan 2023 13:05:55 GMT",
"version": "v3"
}
] | 2023-02-02 | [
[
"Jusufi",
"Kimet",
""
]
] | We construct a novel class of spherically symmetric and asymptotically flat black holes and naked singularities surrounded by anisotropic dark matter fluid with the equation of state (EoS) of the form $P_t=\omega \rho$. We assume that dark matter is made of weakly interacting particles orbiting around the supermassive ... |
gr-qc/0204069 | Bei-Lok Hu | B. L. Hu | A Kinetic Theory Approach to Quantum Gravity | Latex 19 pages. Invited talk given at the 6th Peyresq Meeting,
France, June, 2001. To appear in Int. J. Theor. Phys. 2002 | Int.J.Theor.Phys.41:2091-2119,2002 | 10.1023/A:1021124824987 | umdpp 02-039 | gr-qc | null | We describe a kinetic theory approach to quantum gravity -- by which we mean
a theory of the microscopic structure of spacetime, not a theory obtained by
quantizing general relativity. A figurative conception of this program is like
building a ladder with two knotted poles: quantum matter field on the right and
space... | [
{
"created": "Mon, 22 Apr 2002 01:50:35 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Hu",
"B. L.",
""
]
] | We describe a kinetic theory approach to quantum gravity -- by which we mean a theory of the microscopic structure of spacetime, not a theory obtained by quantizing general relativity. A figurative conception of this program is like building a ladder with two knotted poles: quantum matter field on the right and spaceti... |
gr-qc/0206054 | Martin Bojowald | Martin Bojowald | Inflation from Quantum Geometry | 4 pages, 3 figures | Phys.Rev.Lett.89:261301,2002 | 10.1103/PhysRevLett.89.261301 | CGPG-02/6-2 | gr-qc astro-ph hep-th | null | Quantum geometry predicts that a universe evolves through an inflationary
phase at small volume before exiting gracefully into a standard Friedmann
phase. This does not require the introduction of additional matter fields with
ad hoc potentials; rather, it occurs because of a quantum gravity modification
of the kinet... | [
{
"created": "Tue, 18 Jun 2002 14:30:32 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Bojowald",
"Martin",
""
]
] | Quantum geometry predicts that a universe evolves through an inflationary phase at small volume before exiting gracefully into a standard Friedmann phase. This does not require the introduction of additional matter fields with ad hoc potentials; rather, it occurs because of a quantum gravity modification of the kinetic... |
2212.13438 | Zheng-Wen Long | Shurui Wu, Bing-Qian Wang, Z. W. Long, Hao Chen | Validity of black hole complementarity in the context of generalized
uncertainty principle | arXiv admin note: text overlap with arXiv:1712.04444 by other authors | null | null | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, Elias C. Vagenas et al and Yongwan Gim et al studied the validity
of the no-cloning theorem in the context of generalized uncertainty principle
(GUP), but they came to conflicting conclusions. With this in mind, we
investigate the corrections to the temperature for Schwarzschild black hole in
the context of... | [
{
"created": "Tue, 27 Dec 2022 10:26:35 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Apr 2023 06:36:07 GMT",
"version": "v2"
}
] | 2023-05-01 | [
[
"Wu",
"Shurui",
""
],
[
"Wang",
"Bing-Qian",
""
],
[
"Long",
"Z. W.",
""
],
[
"Chen",
"Hao",
""
]
] | Recently, Elias C. Vagenas et al and Yongwan Gim et al studied the validity of the no-cloning theorem in the context of generalized uncertainty principle (GUP), but they came to conflicting conclusions. With this in mind, we investigate the corrections to the temperature for Schwarzschild black hole in the context of d... |
1801.03840 | Florent Michel | Florent Michel, Renaud Parentani, Scott Robertson | Gravity waves on modulated flows downstream from an obstacle: The
transcritical case | 34 pages, 11 figures, version 2 close to that published in Physical
Review D | Phys. Rev. D 97, 065018 (2018) | 10.1103/PhysRevD.97.065018 | null | gr-qc physics.flu-dyn | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Periodic spatial variations of some parameter arise in analogue gravity
experiments aimed at detecting the analogue version of the Hawking effect in a
white hole flow. Having the same spatial periodicity as low-frequency
dispersive modes, they can induce resonances which significantly modify the
scattering coefficien... | [
{
"created": "Thu, 11 Jan 2018 16:02:54 GMT",
"version": "v1"
},
{
"created": "Fri, 20 Apr 2018 12:07:28 GMT",
"version": "v2"
}
] | 2018-04-23 | [
[
"Michel",
"Florent",
""
],
[
"Parentani",
"Renaud",
""
],
[
"Robertson",
"Scott",
""
]
] | Periodic spatial variations of some parameter arise in analogue gravity experiments aimed at detecting the analogue version of the Hawking effect in a white hole flow. Having the same spatial periodicity as low-frequency dispersive modes, they can induce resonances which significantly modify the scattering coefficients... |
2103.12037 | Giulia Capurri | Giulia Capurri, Andrea Lapi, Carlo Baccigalupi, Lumen Boco, Giulio
Scelfo, Tommaso Ronconi | Intensity and anisotropies of the stochastic Gravitational Wave
background from merging compact binaries in galaxies | 35 pages, 12 figures | null | 10.1088/1475-7516/2021/11/032 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the isotropic and anisotropic components of the Stochastic
Gravitational Wave Background (SGWB) originated from unresolved merging compact
binaries in galaxies. We base our analysis on an empirical approach to galactic
astrophysics that allows to follow the evolution of individual systems. We then
char... | [
{
"created": "Mon, 22 Mar 2021 17:38:47 GMT",
"version": "v1"
},
{
"created": "Fri, 1 Oct 2021 10:19:21 GMT",
"version": "v2"
}
] | 2021-11-16 | [
[
"Capurri",
"Giulia",
""
],
[
"Lapi",
"Andrea",
""
],
[
"Baccigalupi",
"Carlo",
""
],
[
"Boco",
"Lumen",
""
],
[
"Scelfo",
"Giulio",
""
],
[
"Ronconi",
"Tommaso",
""
]
] | We investigate the isotropic and anisotropic components of the Stochastic Gravitational Wave Background (SGWB) originated from unresolved merging compact binaries in galaxies. We base our analysis on an empirical approach to galactic astrophysics that allows to follow the evolution of individual systems. We then charac... |
2110.13141 | Eleonora Giovannetti | Eleonora Giovannetti, Giovanni Montani, Silvia Schiattarella | On the semiclassical and quantum picture of the Bianchi I polymer
dynamics | arXiv admin note: substantial text overlap with arXiv:2105.00360 | null | null | To appear in the Proceedings of the 16th Marcel Grossmann meeting
(5-10 July, 2021) | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the Bianchi I cosmology in the presence of a massless scalar field
and describe its dynamics via a semiclassical and quantum polymer approach. We
investigate the morphology of the emerging Big Bounce by adopting three
different sets of configurational variables: the natural Ashtekar connections,
the Univer... | [
{
"created": "Sun, 24 Oct 2021 14:14:35 GMT",
"version": "v1"
}
] | 2022-03-10 | [
[
"Giovannetti",
"Eleonora",
""
],
[
"Montani",
"Giovanni",
""
],
[
"Schiattarella",
"Silvia",
""
]
] | We analyze the Bianchi I cosmology in the presence of a massless scalar field and describe its dynamics via a semiclassical and quantum polymer approach. We investigate the morphology of the emerging Big Bounce by adopting three different sets of configurational variables: the natural Ashtekar connections, the Universe... |
1309.1119 | Henrique de Andrade Gomes | Henrique Gomes | A first look at Weyl anomalies in shape dynamics | 13 pages. v2 Change of phrasing in the abstract to avoid semantic
ambiguity | J. Math Phys. Volume 54, Issue 11, Nov 2013, 112302 | 10.1063/1.4832396 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the more popular objections towards shape dynamics is the suspicion
that anomalies in the spatial Weyl symmetry will arise upon quantization. The
purpose of this short paper is to establish the tools required for an
investigation of the sort of anomalies that can possibly arise. The first step
is to adapt to o... | [
{
"created": "Wed, 4 Sep 2013 17:57:16 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Sep 2013 17:12:19 GMT",
"version": "v2"
}
] | 2013-11-28 | [
[
"Gomes",
"Henrique",
""
]
] | One of the more popular objections towards shape dynamics is the suspicion that anomalies in the spatial Weyl symmetry will arise upon quantization. The purpose of this short paper is to establish the tools required for an investigation of the sort of anomalies that can possibly arise. The first step is to adapt to our... |
1004.4298 | Tomi Koivisto | Tomi S. Koivisto | Bouncing Palatini cosmologies and their perturbations | 7 pages, 1 figure. v2: added references. | Phys.Rev.D82:044022,2010 | 10.1103/PhysRevD.82.044022 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Nonsingular cosmologies are investigated in the framework of f(R) gravity
within the first order formalism. General conditions for bounces in isotropic
and homogeneous cosmology are presented. It is shown that only a quadratic
curvature correction is needed to predict a bounce in a flat or to describe
cyclic evolutio... | [
{
"created": "Sat, 24 Apr 2010 18:00:27 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Apr 2010 13:50:43 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Koivisto",
"Tomi S.",
""
]
] | Nonsingular cosmologies are investigated in the framework of f(R) gravity within the first order formalism. General conditions for bounces in isotropic and homogeneous cosmology are presented. It is shown that only a quadratic curvature correction is needed to predict a bounce in a flat or to describe cyclic evolution ... |
2105.10951 | Mengjie Wang | Mengjie Wang, Zhou Chen, Qiyuan Pan, Jiliang Jing | Maxwell quasinormal modes on a global monopole Schwarzschild-anti-de
Sitter black hole with Robin boundary conditions | 10 pages, 5 figures, to appear in EPJC | null | 10.1140/epjc/s10052-021-09149-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We generalize our previous studies on the Maxwell quasinormal modes around
Schwarzschild-anti-de-Sitter black holes with Robin type vanishing energy flux
boundary conditions, by adding a global monopole on the background. We first
formulate the Maxwell equations both in the Regge-Wheeler-Zerilli and in the
Teukolsky ... | [
{
"created": "Sun, 23 May 2021 14:52:09 GMT",
"version": "v1"
}
] | 2021-06-16 | [
[
"Wang",
"Mengjie",
""
],
[
"Chen",
"Zhou",
""
],
[
"Pan",
"Qiyuan",
""
],
[
"Jing",
"Jiliang",
""
]
] | We generalize our previous studies on the Maxwell quasinormal modes around Schwarzschild-anti-de-Sitter black holes with Robin type vanishing energy flux boundary conditions, by adding a global monopole on the background. We first formulate the Maxwell equations both in the Regge-Wheeler-Zerilli and in the Teukolsky fo... |
2111.09483 | Avik De Dr. | Tee-How Loo, Avik De, Sanjay Mandal and P.K. Sahoo | How a projectively flat geometry regulates $F(R)$-gravity theory? | 15 pages, 8 figures | Physica Scripta, 96(12) (2021) 125034 | 10.1088/1402-4896/ac3a51 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In the present paper we examine a projectively flat spacetime solution of
$F(R)$-gravity theory. It is seen that once we deploy projective flatness in
the geometry of the spacetime, the matter field has constant energy density and
isotropic pressure. We then make the condition weaker and discuss the effects
of projec... | [
{
"created": "Thu, 18 Nov 2021 02:28:32 GMT",
"version": "v1"
}
] | 2021-12-07 | [
[
"Loo",
"Tee-How",
""
],
[
"De",
"Avik",
""
],
[
"Mandal",
"Sanjay",
""
],
[
"Sahoo",
"P. K.",
""
]
] | In the present paper we examine a projectively flat spacetime solution of $F(R)$-gravity theory. It is seen that once we deploy projective flatness in the geometry of the spacetime, the matter field has constant energy density and isotropic pressure. We then make the condition weaker and discuss the effects of projecti... |
1901.06954 | Mu-Tao Wang | Po-Ning Chen, Mu-Tao Wang, Ye-Kai Wang, and Shing-Tung Yau | Quasi-local mass on unit spheres at spatial infinity | 24 pages | null | null | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note, we compute the limit of the Wang-Yau quasi-local mass on unit
spheres at spatial infinity of an asymptotically flat initial data set. Similar
to the small sphere limit of the Wang-Yau quasi-local mass, we prove that the
leading order term of the quasi-local mass recovers the stress-energy tensor.
For a ... | [
{
"created": "Mon, 21 Jan 2019 15:14:07 GMT",
"version": "v1"
}
] | 2019-01-23 | [
[
"Chen",
"Po-Ning",
""
],
[
"Wang",
"Mu-Tao",
""
],
[
"Wang",
"Ye-Kai",
""
],
[
"Yau",
"Shing-Tung",
""
]
] | In this note, we compute the limit of the Wang-Yau quasi-local mass on unit spheres at spatial infinity of an asymptotically flat initial data set. Similar to the small sphere limit of the Wang-Yau quasi-local mass, we prove that the leading order term of the quasi-local mass recovers the stress-energy tensor. For a va... |
0906.0141 | Sergey Pavluchenko | S.A. Pavluchenko | General features of Bianchi-I cosmological models in Lovelock gravity | extended version of published Brief Report | Phys.Rev.D80:107501,2009 | 10.1103/PhysRevD.80.107501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derived equations of motion corresponding to Bianchi-I cosmological models
in the Lovelock gravity. Equations derived in the general case, without any
specific ansatz for any number of spatial dimensions and any order of the
Lovelock correction. We also analyzed the equations of motion solely taking
into account t... | [
{
"created": "Mon, 1 Jun 2009 12:39:34 GMT",
"version": "v1"
},
{
"created": "Tue, 19 Jan 2010 10:04:22 GMT",
"version": "v2"
}
] | 2010-01-22 | [
[
"Pavluchenko",
"S. A.",
""
]
] | We derived equations of motion corresponding to Bianchi-I cosmological models in the Lovelock gravity. Equations derived in the general case, without any specific ansatz for any number of spatial dimensions and any order of the Lovelock correction. We also analyzed the equations of motion solely taking into account the... |
2201.05684 | Fernando Carneiro | F. L. Carneiro, S. C. Ulhoa, J. W. Maluf, J. F. da Rocha-Neto | On the total energy conservation of the Alcubierre spacetime | 25 pages, 11 figures | JCAP07(2022)030 | 10.1088/1475-7516/2022/07/030 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this article, we consider the Alcubierre spacetime, such a spacetime
describes a ``bubble'' that propagates with arbitrary global velocity. This
setting allows movement at a speed greater than that of light. There are some
known problems with this metric, e.g., the source's negative energy and the
violation of the... | [
{
"created": "Fri, 14 Jan 2022 21:42:17 GMT",
"version": "v1"
},
{
"created": "Thu, 18 Aug 2022 13:26:52 GMT",
"version": "v2"
}
] | 2022-08-19 | [
[
"Carneiro",
"F. L.",
""
],
[
"Ulhoa",
"S. C.",
""
],
[
"Maluf",
"J. W.",
""
],
[
"da Rocha-Neto",
"J. F.",
""
]
] | In this article, we consider the Alcubierre spacetime, such a spacetime describes a ``bubble'' that propagates with arbitrary global velocity. This setting allows movement at a speed greater than that of light. There are some known problems with this metric, e.g., the source's negative energy and the violation of the s... |
gr-qc/0603109 | Prasanta Mahato | Prasanta Mahato | Torsion, Scalar Field, Mass and FRW Cosmology | null | Int.J.Theor.Phys. 44 (2005) 79-93 | null | null | gr-qc | null | In the Einstein-Cartan space $U_4$, an axial vector torsion together with a
scalar field connected to a local scale factor have been considered. By
combining two particular terms from the SO(4,1) Pontryagin density and then
modifying it in a SO(3,1) invariant way, we get a Lagrangian density with
Lagrange multipliers... | [
{
"created": "Tue, 28 Mar 2006 17:12:39 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Mar 2006 16:58:45 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Mahato",
"Prasanta",
""
]
] | In the Einstein-Cartan space $U_4$, an axial vector torsion together with a scalar field connected to a local scale factor have been considered. By combining two particular terms from the SO(4,1) Pontryagin density and then modifying it in a SO(3,1) invariant way, we get a Lagrangian density with Lagrange multipliers. ... |
1108.5220 | Tony Downes | T. G. Downes, G. J. Milburn and C. M. Caves | Optimal Quantum Estimation for Gravitation | null | null | null | null | gr-qc math-ph math.MP quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Here we describe the quantum limit to measurement of the classical
gravitational field. Specifically, we write down the optimal quantum Cramer-Rao
lower bound, for any single parameter describing a metric for spacetime. The
standard time-energy and Heisenberg uncertainty relations are shown to be
special cases of the... | [
{
"created": "Fri, 26 Aug 2011 01:05:25 GMT",
"version": "v1"
},
{
"created": "Mon, 5 Nov 2012 23:34:16 GMT",
"version": "v2"
}
] | 2012-11-07 | [
[
"Downes",
"T. G.",
""
],
[
"Milburn",
"G. J.",
""
],
[
"Caves",
"C. M.",
""
]
] | Here we describe the quantum limit to measurement of the classical gravitational field. Specifically, we write down the optimal quantum Cramer-Rao lower bound, for any single parameter describing a metric for spacetime. The standard time-energy and Heisenberg uncertainty relations are shown to be special cases of the u... |
2305.05438 | Killian Martineau | Maxime De Sousa, Aur\'elien Barrau, Killian Martineau | Closer look at cosmological consequences of interacting group field
theory | null | null | 10.1016/j.physletb.2023.138069 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Group field theory has shown to be a promising framework to derive
cosmological predictions from full quantum gravity. In this brief note, we
revisit the background dynamics when interaction terms are taken into account
and conclude that, although the bounce is clearly robust, providing a
geometrical explanation for ... | [
{
"created": "Tue, 9 May 2023 13:29:58 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Sep 2023 10:02:32 GMT",
"version": "v2"
}
] | 2023-09-06 | [
[
"De Sousa",
"Maxime",
""
],
[
"Barrau",
"Aurélien",
""
],
[
"Martineau",
"Killian",
""
]
] | Group field theory has shown to be a promising framework to derive cosmological predictions from full quantum gravity. In this brief note, we revisit the background dynamics when interaction terms are taken into account and conclude that, although the bounce is clearly robust, providing a geometrical explanation for in... |
gr-qc/0206030 | Chryssomalis Chryssomalakos | C. Chryssomalakos and D. Sudarsky (ICN, UNAM) | On the Geometrical Character of Gravitation | 10 pages. Submitted to General Relativity and Gravitation. V2: a
misspelled reference corrected | Gen.Rel.Grav. 35 (2003) 605-617 | 10.1023/A:1022957916776 | null | gr-qc quant-ph | null | The issue of whether some manifestations of gravitation in the quantum
domain, are indicative or not of a non-geometrical aspect in gravitation is
discussed. We examine some examples that have been considered in this context,
providing a critical analysis of previous interpretations. The analysis of
these examples is... | [
{
"created": "Tue, 11 Jun 2002 02:11:38 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jun 2002 23:32:34 GMT",
"version": "v2"
}
] | 2015-06-25 | [
[
"Chryssomalakos",
"C.",
"",
"ICN, UNAM"
],
[
"Sudarsky",
"D.",
"",
"ICN, UNAM"
]
] | The issue of whether some manifestations of gravitation in the quantum domain, are indicative or not of a non-geometrical aspect in gravitation is discussed. We examine some examples that have been considered in this context, providing a critical analysis of previous interpretations. The analysis of these examples is i... |
2001.11156 | Maxime Van de Moortel | Maxime Van de Moortel | Mass inflation and the $C^2$-inextendibility of spherically symmetric
charged scalar field dynamical black holes | Versions accepted for publication in Communications in Mathematical
Physics | null | 10.1007/s00220-020-03923-w | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It has long been suggested that the Cauchy horizon of dynamical black holes
is subject to a weak null singularity, under the mass inflation scenario. We
study in spherical symmetry the Einstein-Maxwell-Klein-Gordon equations and
\textit{while we do not directly show mass inflation}, we obtain a "mass
inflation/ridigi... | [
{
"created": "Thu, 30 Jan 2020 02:43:31 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Aug 2020 15:06:53 GMT",
"version": "v2"
}
] | 2021-02-03 | [
[
"Van de Moortel",
"Maxime",
""
]
] | It has long been suggested that the Cauchy horizon of dynamical black holes is subject to a weak null singularity, under the mass inflation scenario. We study in spherical symmetry the Einstein-Maxwell-Klein-Gordon equations and \textit{while we do not directly show mass inflation}, we obtain a "mass inflation/ridigity... |
gr-qc/0009028 | Arkadii A. Popov | Arkadii A. Popov, Sergey V. Sushkov | Vacuum polarization of a scalar field in wormhole spacetimes | 10 pages, RevTeX, two eps figures | Phys.Rev. D63 (2001) 044017 | 10.1103/PhysRevD.63.044017 | KGPU-00-01 | gr-qc | null | An analitical approximation of $<\phi^2>$ for a scalar field in a static
spherically symmetric wormhole spacetime is obtained. The scalar field is
assumed to be both massive and massless, with an arbitrary coupling $\xi$ to
the scalar curvature, and in a zero temperature vacuum state.
| [
{
"created": "Sun, 10 Sep 2000 07:20:36 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Popov",
"Arkadii A.",
""
],
[
"Sushkov",
"Sergey V.",
""
]
] | An analitical approximation of $<\phi^2>$ for a scalar field in a static spherically symmetric wormhole spacetime is obtained. The scalar field is assumed to be both massive and massless, with an arbitrary coupling $\xi$ to the scalar curvature, and in a zero temperature vacuum state. |
1812.11191 | Anzhong Wang | Bao-Fei Li, Tao Zhu, Anzhong Wang, Klaus Kirsten, Gerald Cleaver, and
Qin Sheng | Preinflationary perturbations from the closed algebra approach in loop
quantum cosmology | Corrected some typos. Phys. Rev. D99, 103536 (2019) | Phys. Rev. D 99, 103536 (2019) | 10.1103/PhysRevD.99.103536 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, the scalar and tensor perturbations in the closed algebra
approach of loop quantum cosmology are studied. Instead of the distant past in
the contracting phase, we choose the moment at which the initial conditions are
imposed to be the silent point, which circumvents the problem due to the
signature cha... | [
{
"created": "Fri, 28 Dec 2018 19:00:09 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Apr 2019 20:08:45 GMT",
"version": "v2"
},
{
"created": "Fri, 17 May 2019 11:44:02 GMT",
"version": "v3"
},
{
"created": "Wed, 29 May 2019 13:42:52 GMT",
"version": "v4"
}
] | 2019-06-05 | [
[
"Li",
"Bao-Fei",
""
],
[
"Zhu",
"Tao",
""
],
[
"Wang",
"Anzhong",
""
],
[
"Kirsten",
"Klaus",
""
],
[
"Cleaver",
"Gerald",
""
],
[
"Sheng",
"Qin",
""
]
] | In this paper, the scalar and tensor perturbations in the closed algebra approach of loop quantum cosmology are studied. Instead of the distant past in the contracting phase, we choose the moment at which the initial conditions are imposed to be the silent point, which circumvents the problem due to the signature chang... |
1710.08395 | Sreeram Valluri SR | F. Chishtie, S.R. Valluri | An analytic approach for the study of pulsar spindown | null | null | 10.1088/1361-6382/aac9d6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we develop an analytic approach to study pulsar spindown. We use
the monopolar spindown model by Alvarez and Carrami\~{n}ana (2004), which
assumes an inverse linear law of magnetic field decay of the pulsar, to extract
an all-order formula for the spindown parameters which are expressed in terms
of modif... | [
{
"created": "Mon, 23 Oct 2017 17:19:15 GMT",
"version": "v1"
}
] | 2018-07-11 | [
[
"Chishtie",
"F.",
""
],
[
"Valluri",
"S. R.",
""
]
] | In this work we develop an analytic approach to study pulsar spindown. We use the monopolar spindown model by Alvarez and Carrami\~{n}ana (2004), which assumes an inverse linear law of magnetic field decay of the pulsar, to extract an all-order formula for the spindown parameters which are expressed in terms of modifie... |
1304.0670 | LVK Publication | The LIGO Scientific Collaboration, the Virgo Collaboration, and the
KAGRA Collaboration: B. P. Abbott, R. Abbott, T. D. Abbott, S. Abraham, F.
Acernese, K. Ackley, C. Adams, V. B. Adya, C. Affeldt, M. Agathos, K.
Agatsuma, N. Aggarwal, O. D. Aguiar, L. Aiello, A. Ain, P. Ajith, T. Akutsu,
G. Allen, A. Allocca, ... | Prospects for Observing and Localizing Gravitational-Wave Transients
with Advanced LIGO, Advanced Virgo and KAGRA | 52 pages, 9 figures, 5 tables. We have updated the detector
sensitivities (including the A+ and AdV+ upgrade); added expectations for
binary black-holes, neutron-star black-holes, and intermediate-mass black
holes; and added 3D volume localization expectations. This update is to
change some numbers in Table 5 b... | Living Rev Relativ 23, 3 (2020) | 10.1007/s41114-020-00026-9 | LIGO-P1200087, VIR-0288A-12, JGW-P1808427 | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | We present our current best estimate of the plausible observing scenarios for
the Advanced LIGO, Advanced Virgo and KAGRA gravitational-wave detectors over
the next several years, with the intention of providing information to
facilitate planning for multi-messenger astronomy with gravitational waves. We
estimate the... | [
{
"created": "Tue, 2 Apr 2013 15:40:39 GMT",
"version": "v1"
},
{
"created": "Tue, 14 Jan 2020 22:22:37 GMT",
"version": "v10"
},
{
"created": "Tue, 24 Nov 2020 20:19:46 GMT",
"version": "v11"
},
{
"created": "Mon, 21 Dec 2015 16:14:07 GMT",
"version": "v2"
},
{
"... | 2020-11-26 | [
[
"The LIGO Scientific Collaboration",
"",
""
],
[
"the Virgo Collaboration",
"",
""
],
[
"the KAGRA Collaboration",
"",
""
],
[
"Abbott",
"B. P.",
""
],
[
"Abbott",
"R.",
""
],
[
"Abbott",
"T. D.",
""
],
[
"Abraham"... | We present our current best estimate of the plausible observing scenarios for the Advanced LIGO, Advanced Virgo and KAGRA gravitational-wave detectors over the next several years, with the intention of providing information to facilitate planning for multi-messenger astronomy with gravitational waves. We estimate the s... |
0706.3130 | Salvatore Capozziello | S. A. Ali, C. Cafaro, S. Capozziello, Ch. Corda | Abelian Magnetic Monopoles and Topologically Massive Vector Bosons in
Scalar-Tensor Gravity with Torsion Potential | 18 pages, no figures | Int. J. Mod. Phys. A23, 4315 (2008) | 10.1142/S0217751X08041438 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A Lagrangian formulation describing the electromagnetic interaction -
mediated by topologically massive vector bosons - between charged, spin-(1/2)
fermions with an abelian magnetic monopole in a curved spacetime with
non-minimal coupling and torsion potential is presented. The covariant field
equations are obtained.... | [
{
"created": "Thu, 21 Jun 2007 12:00:21 GMT",
"version": "v1"
},
{
"created": "Wed, 27 May 2009 16:02:32 GMT",
"version": "v2"
}
] | 2009-05-27 | [
[
"Ali",
"S. A.",
""
],
[
"Cafaro",
"C.",
""
],
[
"Capozziello",
"S.",
""
],
[
"Corda",
"Ch.",
""
]
] | A Lagrangian formulation describing the electromagnetic interaction - mediated by topologically massive vector bosons - between charged, spin-(1/2) fermions with an abelian magnetic monopole in a curved spacetime with non-minimal coupling and torsion potential is presented. The covariant field equations are obtained. T... |
1807.02426 | Rodrigo Avalos | R. Avalos, I. P. Lobo, T. Sanomiya and C. Romero | On the Cauchy Problem for Weyl-Geometric Scalar-Tensor Theories of
Gravity | null | Journal of Mathematical Physics 59, 062502 (2018) | 10.1063/1.5017848 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we analyse the well-posedness of the initial value formulation
for particular kinds of geometric scalar-tensor theories of gravity, which are
based on a Weyl integrable space-time. We will show that, within a
frame-invariant interpretation for the theory, the Cauchy problem in vacuum is
well-posed. We ... | [
{
"created": "Fri, 6 Jul 2018 14:09:58 GMT",
"version": "v1"
}
] | 2018-07-09 | [
[
"Avalos",
"R.",
""
],
[
"Lobo",
"I. P.",
""
],
[
"Sanomiya",
"T.",
""
],
[
"Romero",
"C.",
""
]
] | In this paper, we analyse the well-posedness of the initial value formulation for particular kinds of geometric scalar-tensor theories of gravity, which are based on a Weyl integrable space-time. We will show that, within a frame-invariant interpretation for the theory, the Cauchy problem in vacuum is well-posed. We wi... |
gr-qc/0105073 | Somasri Sen | Narayan Banerjee, Somasri Sen and Naresh Dadhich | On the detection of scalar hair | RevTex style, 4 pages, no figures | Mod.Phys.Lett. A16 (2001) 1223-1228 | 10.1142/S0217732301004388 | null | gr-qc | null | It is shown that the conclusion regarding the existence of a scalar hair for
a black hole in a nonminimally coupled self interacting scalar tensor theory
can be drawn from the that for a scalar field minimally coupled to gravity by
means of a conformal transformation.
| [
{
"created": "Sun, 20 May 2001 05:37:38 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Banerjee",
"Narayan",
""
],
[
"Sen",
"Somasri",
""
],
[
"Dadhich",
"Naresh",
""
]
] | It is shown that the conclusion regarding the existence of a scalar hair for a black hole in a nonminimally coupled self interacting scalar tensor theory can be drawn from the that for a scalar field minimally coupled to gravity by means of a conformal transformation. |
1306.2888 | Juan Luis P\'erez P\'erez | Juan L. Perez, Miguel A. Garcia-Aspeitia and L. Arturo Urena-Lopez | Cosmological solutions for a two-branes system in a vacuum bulk | null | null | 10.1063/1.4817055 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the cosmology for a two branes model in a space-time of five
dimensions where the extra coordinate is compactified on an orbifold. The
hidden brane is filled with a real scalar field endowed with a quadratic
potential that behaves as primordial dark matter field. This case is analyzed
when the radion effects... | [
{
"created": "Wed, 12 Jun 2013 16:40:17 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Perez",
"Juan L.",
""
],
[
"Garcia-Aspeitia",
"Miguel A.",
""
],
[
"Urena-Lopez",
"L. Arturo",
""
]
] | We study the cosmology for a two branes model in a space-time of five dimensions where the extra coordinate is compactified on an orbifold. The hidden brane is filled with a real scalar field endowed with a quadratic potential that behaves as primordial dark matter field. This case is analyzed when the radion effects a... |
1003.5528 | Fabrizio De Marchi | M. Cerdonio, F. De Marchi, R. De Pietri, P. Jetzer, F. Marzari, G.
Mazzolo, A. Ortolan, M. Sereno | Modulation of LISA free-fall orbits due to the Earth-Moon system | 15 pages, 5 figures | Class.Quant.Grav.27:165007,2010 | 10.1088/0264-9381/27/16/165007 | null | gr-qc | http://creativecommons.org/licenses/by/3.0/ | We calculate the effect of the Earth-Moon (EM) system on the free-fall motion
of LISA test masses. We show that the periodic gravitational pulling of the EM
system induces a resonance with fundamental frequency 1 yr^-1 and a series of
periodic perturbations with frequencies equal to integer harmonics of the
synodic m... | [
{
"created": "Mon, 29 Mar 2010 12:59:26 GMT",
"version": "v1"
},
{
"created": "Wed, 9 Jun 2010 10:14:22 GMT",
"version": "v2"
}
] | 2014-11-20 | [
[
"Cerdonio",
"M.",
""
],
[
"De Marchi",
"F.",
""
],
[
"De Pietri",
"R.",
""
],
[
"Jetzer",
"P.",
""
],
[
"Marzari",
"F.",
""
],
[
"Mazzolo",
"G.",
""
],
[
"Ortolan",
"A.",
""
],
[
"Sereno",
"M.",... | We calculate the effect of the Earth-Moon (EM) system on the free-fall motion of LISA test masses. We show that the periodic gravitational pulling of the EM system induces a resonance with fundamental frequency 1 yr^-1 and a series of periodic perturbations with frequencies equal to integer harmonics of the synodic mon... |
1701.08719 | Yang Li | Yang Li and Daniele Oriti and Mingyi Zhang | Group field theory for quantum gravity minimally coupled to a scalar
field | 41 pages, 2 figures | null | 10.1088/1361-6382/aa85d2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a group field theory model for quantum gravity minimally coupled
to relativistic scalar fields, defining as well a corresponding discrete
gravity path integral (and, implicitly, a coupled spin foam model) in its
Feynman expansion. We also analyze a number of variations of the same model,
the correspondin... | [
{
"created": "Mon, 30 Jan 2017 17:35:58 GMT",
"version": "v1"
},
{
"created": "Wed, 8 Mar 2017 02:42:56 GMT",
"version": "v2"
},
{
"created": "Fri, 24 Mar 2017 09:03:27 GMT",
"version": "v3"
},
{
"created": "Sat, 1 Apr 2017 10:55:12 GMT",
"version": "v4"
}
] | 2017-09-27 | [
[
"Li",
"Yang",
""
],
[
"Oriti",
"Daniele",
""
],
[
"Zhang",
"Mingyi",
""
]
] | We construct a group field theory model for quantum gravity minimally coupled to relativistic scalar fields, defining as well a corresponding discrete gravity path integral (and, implicitly, a coupled spin foam model) in its Feynman expansion. We also analyze a number of variations of the same model, the corresponding ... |
gr-qc/9703006 | Dr John W. Barrett | John W. Barrett | Sources of symmetric potentials | 4 pages, plain TeX, unpublished preprint from 1990, referred to in
gr-qc/9611051 | null | null | NCL-90 TP-16 | gr-qc | null | Laboratory experiments on gravitation are usually performed with objects of
constant density, so that the analysis of the forces concerns only the geometry
of their shape. In an ideal experiment, the shapes of the constituent parts
will be optimised to meet certain mathematical criteria, which ensure that the
experim... | [
{
"created": "Mon, 3 Mar 1997 13:39:43 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Barrett",
"John W.",
""
]
] | Laboratory experiments on gravitation are usually performed with objects of constant density, so that the analysis of the forces concerns only the geometry of their shape. In an ideal experiment, the shapes of the constituent parts will be optimised to meet certain mathematical criteria, which ensure that the experimen... |
2105.15188 | Zachary Nasipak | Zachary Nasipak and Charles R. Evans | Resonant self-force effects in extreme-mass-ratio binaries: A scalar
model | 32 pages, 15 figures; Updated to reflect published version | Phys. Rev. D 104, 084011 (2021) | 10.1103/PhysRevD.104.084011 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Extreme-mass ratio inspirals (EMRIs), compact binaries with small mass ratios
$\epsilon\ll 1$, will be important sources for low-frequency gravitational wave
detectors. Almost all EMRIs will evolve through important transient orbital
$r\theta$ resonances, which will enhance or diminish their gravitational wave
flux, ... | [
{
"created": "Mon, 31 May 2021 17:51:54 GMT",
"version": "v1"
},
{
"created": "Fri, 4 Jun 2021 18:52:21 GMT",
"version": "v2"
},
{
"created": "Mon, 4 Oct 2021 15:48:40 GMT",
"version": "v3"
}
] | 2021-10-05 | [
[
"Nasipak",
"Zachary",
""
],
[
"Evans",
"Charles R.",
""
]
] | Extreme-mass ratio inspirals (EMRIs), compact binaries with small mass ratios $\epsilon\ll 1$, will be important sources for low-frequency gravitational wave detectors. Almost all EMRIs will evolve through important transient orbital $r\theta$ resonances, which will enhance or diminish their gravitational wave flux, th... |
gr-qc/0309107 | Gaurav Khanna | Gaurav Khanna | Teukolsky evolution of particle orbits around Kerr black holes in the
time domain: elliptic and inclined orbits | 6 pages, 3 figures; submitted to PRD | Phys.Rev. D69 (2004) 024016 | 10.1103/PhysRevD.69.024016 | null | gr-qc | null | We extend the treatment of the problem of the gravitational waves produced by
a particle of negligible mass orbiting a Kerr black hole using black hole
perturbation theory in the time domain, to elliptic and inclined orbits. We
model the particle by smearing the singularities in the source term using
narrow Gaussian ... | [
{
"created": "Mon, 22 Sep 2003 19:42:06 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Khanna",
"Gaurav",
""
]
] | We extend the treatment of the problem of the gravitational waves produced by a particle of negligible mass orbiting a Kerr black hole using black hole perturbation theory in the time domain, to elliptic and inclined orbits. We model the particle by smearing the singularities in the source term using narrow Gaussian di... |
1712.04092 | Thomas P. Kling | Thomas Kling, Kevin Roebuck, Eric Grotzke | Null Geodesics and Wave Front Singularities in the Godel Space-time | null | Gen Relativity Gravitation (2018) 50:7 | 10.1007/s10714-017-2328-2 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore wave fronts of null geodesics in the Godel metric emitted from
point sources both at, and away from, the origin. For constant time wave fronts
emitted by sources away from the origin, we find cusp ridges as well as blue
sky metamorphoses where spatially disconnected portions of the wave front
appear, conne... | [
{
"created": "Tue, 12 Dec 2017 01:49:01 GMT",
"version": "v1"
}
] | 2017-12-13 | [
[
"Kling",
"Thomas",
""
],
[
"Roebuck",
"Kevin",
""
],
[
"Grotzke",
"Eric",
""
]
] | We explore wave fronts of null geodesics in the Godel metric emitted from point sources both at, and away from, the origin. For constant time wave fronts emitted by sources away from the origin, we find cusp ridges as well as blue sky metamorphoses where spatially disconnected portions of the wave front appear, connect... |
1404.6210 | Victor Shchigolev Konstantinovich | V. K. Shchigolev | On Exact Cosmological Models of a Scalar Field in Lyra Geometry | 6 pages, no figures | Universal Journal of Physics and Application 1(4): 408-413, 2013 | 10.13189/ujpa.2013.010406 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Exact cosmological models for a scalar field in Lyra geometry are studied in
the presence of a time-varying effective cosmological term originated from the
specific interaction of an auxiliary $\Lambda$ - term with the displacement
vector. In this case, some exact solutions for the model equations are obtained
with t... | [
{
"created": "Thu, 24 Apr 2014 18:08:46 GMT",
"version": "v1"
}
] | 2014-04-25 | [
[
"Shchigolev",
"V. K.",
""
]
] | Exact cosmological models for a scalar field in Lyra geometry are studied in the presence of a time-varying effective cosmological term originated from the specific interaction of an auxiliary $\Lambda$ - term with the displacement vector. In this case, some exact solutions for the model equations are obtained with the... |
2005.04752 | Cosimo Bambi | Bakhtiyor Narzilloev, Javlon Rayimbaev, Ahmadjon Abdujabbarov, Cosimo
Bambi | Charged particle motion around non-singular black holes in conformal
gravity in the presence of external magnetic field | 17 pages, 18 figures. v2: refereed version | Eur. Phys. J. C (2020) 80:1074 | 10.1140/epjc/s10052-020-08623-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider electromagnetic fields and charged particle dynamics around
non-singular black holes in conformal gravity immersed in an external,
asymptotically uniform magnetic field. First, we obtain analytic solutions of
the electromagnetic field equation around rotating non-singular black holes in
conformal gravity.... | [
{
"created": "Sun, 10 May 2020 18:55:44 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Nov 2020 23:53:07 GMT",
"version": "v2"
}
] | 2020-11-24 | [
[
"Narzilloev",
"Bakhtiyor",
""
],
[
"Rayimbaev",
"Javlon",
""
],
[
"Abdujabbarov",
"Ahmadjon",
""
],
[
"Bambi",
"Cosimo",
""
]
] | We consider electromagnetic fields and charged particle dynamics around non-singular black holes in conformal gravity immersed in an external, asymptotically uniform magnetic field. First, we obtain analytic solutions of the electromagnetic field equation around rotating non-singular black holes in conformal gravity. W... |
2003.02304 | Ivan Agullo | Ivan Agullo, Javier Olmedo and V. Sreenath | Predictions for the CMB from an anisotropic quantum bounce | 5 pages, 4 figures, minor changes to match published version | Phys. Rev. Lett. 124, 251301 (2020) | 10.1103/PhysRevLett.124.251301 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce an extension of the standard inflationary paradigm on which the
big bang singularity is replaced by an anisotropic bounce. Unlike in the big
bang model, cosmological perturbations find an adiabatic regime in the past. We
show that this scenario accounts for the observed quadrupolar modulation in the
temp... | [
{
"created": "Wed, 4 Mar 2020 19:41:09 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jul 2020 23:16:57 GMT",
"version": "v2"
}
] | 2020-07-13 | [
[
"Agullo",
"Ivan",
""
],
[
"Olmedo",
"Javier",
""
],
[
"Sreenath",
"V.",
""
]
] | We introduce an extension of the standard inflationary paradigm on which the big bang singularity is replaced by an anisotropic bounce. Unlike in the big bang model, cosmological perturbations find an adiabatic regime in the past. We show that this scenario accounts for the observed quadrupolar modulation in the temper... |
2005.13096 | A. Yu. Petrov | J. R. Nascimento, A. Yu. Petrov, P. J. Porfirio, A. R. Soares | Gravitational lensing in a black-bounce traversable wormhole spacetime | 15 pages, version accepted to PRD | Phys. Rev. D 102, 044021 (2020) | 10.1103/PhysRevD.102.044021 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we calculate the deflection angle of light in a spacetime that
interpolates between regular black holes and traversable wormholes, depending
on the free parameter of the metric. Afterwards, this angular deflection is
substituted into the lens equations which allows to obtain physically
measurable result... | [
{
"created": "Wed, 27 May 2020 00:23:29 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Jul 2020 22:52:04 GMT",
"version": "v2"
}
] | 2020-08-11 | [
[
"Nascimento",
"J. R.",
""
],
[
"Petrov",
"A. Yu.",
""
],
[
"Porfirio",
"P. J.",
""
],
[
"Soares",
"A. R.",
""
]
] | In this work, we calculate the deflection angle of light in a spacetime that interpolates between regular black holes and traversable wormholes, depending on the free parameter of the metric. Afterwards, this angular deflection is substituted into the lens equations which allows to obtain physically measurable results,... |
gr-qc/9804049 | Jean-Philippe Uzan du Darc | Nathalie Deruelle (DARC, Observatoire de Paris) and Jean-Philippe Uzan
(DARC, Observatoire de Paris) | Conservation Laws for Cosmological Perurbations | 7 pages, no figure, published in the Proceedings of the workshop on
Cosmology and Time Asymmetry, Peyresq, July 21-31,1996, Int. Jour. Theor.
Physics, 36, 2461 (1997) | Int.J.Theor.Phys. 36 (1997) 2461 | null | null | gr-qc | null | We briefly recall the problem of defining conserved quantities such as energy
in general relativity, and the solution by introducing a symmetric background.
We apply the general formalism to perturbed Robertson-Walker spacetimes with de
Sitter geometry as background. We relate the obtained conserved quantities to
Tra... | [
{
"created": "Tue, 21 Apr 1998 14:41:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Deruelle",
"Nathalie",
"",
"DARC, Observatoire de Paris"
],
[
"Uzan",
"Jean-Philippe",
"",
"DARC, Observatoire de Paris"
]
] | We briefly recall the problem of defining conserved quantities such as energy in general relativity, and the solution by introducing a symmetric background. We apply the general formalism to perturbed Robertson-Walker spacetimes with de Sitter geometry as background. We relate the obtained conserved quantities to Trasc... |
2009.11606 | Mohammad Ali Gorji | Mohammad Ali Gorji, Hayato Motohashi, Shinji Mukohyama | Stealth dark energy in scordatura DHOST theory | 33 pages, typos corrected, published version | null | 10.1088/1475-7516/2021/03/081 | YITP-20-118, IPMU20-0099 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A stealth de Sitter solution in scalar-tensor theories has an exact de Sitter
background metric and a nontrivial scalar field profile. Recently, in the
context of Degenerate Higher-Order Scalar-Tensor (DHOST) theories it was shown
that stealth de Sitter solutions suffer from either infinite strong coupling or
gradien... | [
{
"created": "Thu, 24 Sep 2020 11:25:33 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Mar 2021 02:46:21 GMT",
"version": "v2"
}
] | 2021-03-26 | [
[
"Gorji",
"Mohammad Ali",
""
],
[
"Motohashi",
"Hayato",
""
],
[
"Mukohyama",
"Shinji",
""
]
] | A stealth de Sitter solution in scalar-tensor theories has an exact de Sitter background metric and a nontrivial scalar field profile. Recently, in the context of Degenerate Higher-Order Scalar-Tensor (DHOST) theories it was shown that stealth de Sitter solutions suffer from either infinite strong coupling or gradient ... |
1211.2562 | Iver Brevik | Iver Brevik | Viscosity in modified gravity | 9 pages, no figure; reference list updated and expanded | Entropy 2012, 14, 2302-2310 | 10.3390/e14112302 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A bulk viscosity is introduced in the formalism of modified gravity. It is
shown that, on the basis of a natural scaling law for the viscosity, a simple
solution can be found for quantities such as the Hubble parameter and the
energy density. These solutions may incorporate a viscosity-induced Big Rip
singularity. By... | [
{
"created": "Mon, 12 Nov 2012 10:58:32 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Nov 2012 14:49:02 GMT",
"version": "v2"
}
] | 2012-11-26 | [
[
"Brevik",
"Iver",
""
]
] | A bulk viscosity is introduced in the formalism of modified gravity. It is shown that, on the basis of a natural scaling law for the viscosity, a simple solution can be found for quantities such as the Hubble parameter and the energy density. These solutions may incorporate a viscosity-induced Big Rip singularity. By i... |
1707.06141 | Jacques Smulevici | David Fajman, J\'er\'emie Joudioux and Jacques Smulevici | The Stability of the Minkowski space for the Einstein-Vlasov system | 139 pages | Analysis & PDE 14 (2021) 425-531 | 10.2140/apde.2021.14.425 | null | gr-qc math-ph math.AP math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We prove the global stability of the Minkowski space viewed as the trivial
solution of the Einstein-Vlasov system. To estimate the Vlasov field, we use
the vector field and modified vector field techniques developed in [FJS15;
FJS17]. In particular, the initial support in the velocity variable does not
need to be com... | [
{
"created": "Wed, 19 Jul 2017 15:10:21 GMT",
"version": "v1"
}
] | 2021-03-24 | [
[
"Fajman",
"David",
""
],
[
"Joudioux",
"Jérémie",
""
],
[
"Smulevici",
"Jacques",
""
]
] | We prove the global stability of the Minkowski space viewed as the trivial solution of the Einstein-Vlasov system. To estimate the Vlasov field, we use the vector field and modified vector field techniques developed in [FJS15; FJS17]. In particular, the initial support in the velocity variable does not need to be compa... |
2204.09490 | Farook Rahaman | S S De, Farook Rahaman, Antara Mapdar | Geometrical Origin of Growth of Matter Perturbations | 5 pages. 1 figure | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The density perturbation of the universe has been considered in the framework
of a Finslerian cosmological model in which the background spacetime of the
universe is taken as the spatially flat FLRW spacetime with a Finslerian
perturbation. The inhomogeneity in the matter(energy) density arises naturally
in this cons... | [
{
"created": "Tue, 19 Apr 2022 15:18:44 GMT",
"version": "v1"
}
] | 2022-04-21 | [
[
"De",
"S S",
""
],
[
"Rahaman",
"Farook",
""
],
[
"Mapdar",
"Antara",
""
]
] | The density perturbation of the universe has been considered in the framework of a Finslerian cosmological model in which the background spacetime of the universe is taken as the spatially flat FLRW spacetime with a Finslerian perturbation. The inhomogeneity in the matter(energy) density arises naturally in this consid... |
1912.13432 | Plamen Fiziev | Plamen P. Fiziev | New Results for Quasi Normal Modes of Gravitational Waves | 9 pages, 4 figures | null | null | SU-2019_11 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We briefly consider the data of collaboration LIGO/VIRGO for gravitational
waves (GW) and the recent observations of Event Horizon Telescope (EHT), and we
discuss difficulties for finding the right theory of gravity and the nature of
the observed Extremely Compact Objects (ECOs). The only undisputable way to
establis... | [
{
"created": "Tue, 31 Dec 2019 17:10:21 GMT",
"version": "v1"
}
] | 2020-01-01 | [
[
"Fiziev",
"Plamen P.",
""
]
] | We briefly consider the data of collaboration LIGO/VIRGO for gravitational waves (GW) and the recent observations of Event Horizon Telescope (EHT), and we discuss difficulties for finding the right theory of gravity and the nature of the observed Extremely Compact Objects (ECOs). The only undisputable way to establish ... |
2207.04417 | Christian Ecker | Christian Ecker and Luciano Rezzolla | A general, scale-independent description of the sound speed in neutron
stars | 7 pages, 4 figures, 1 appendix, version published in ApJL | Astrophys.J.Lett. 939 (2022) 2, L35 | 10.3847/2041-8213/ac8674 | null | gr-qc astro-ph.HE nucl-th | http://creativecommons.org/licenses/by/4.0/ | Using more than a million randomly generated equations of state that satisfy
theoretical and observational constraints we construct a novel,
scale-independent description of the sound speed in neutron stars where the
latter is expressed in a unit-cube spanning the normalised radius, $r/R$, and
the mass normalized to ... | [
{
"created": "Sun, 10 Jul 2022 08:36:52 GMT",
"version": "v1"
},
{
"created": "Sat, 3 Dec 2022 13:05:57 GMT",
"version": "v2"
}
] | 2022-12-07 | [
[
"Ecker",
"Christian",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | Using more than a million randomly generated equations of state that satisfy theoretical and observational constraints we construct a novel, scale-independent description of the sound speed in neutron stars where the latter is expressed in a unit-cube spanning the normalised radius, $r/R$, and the mass normalized to th... |
1611.03732 | Mauro Pieroni | Mauro Pieroni | Classification of inflationary models and constraints on fundamental
physics | PhD thesis, 2016, Univ Paris Diderot | null | null | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This work is focused on the study of early time cosmology and in particular
on the study of inflation. After an introduction on the standard Big Bang
theory, we discuss the physics of CMB and we explain how its observations can
be used to set constraints on cosmological models. We introduce inflation and
we carry out... | [
{
"created": "Fri, 11 Nov 2016 15:31:49 GMT",
"version": "v1"
}
] | 2016-11-14 | [
[
"Pieroni",
"Mauro",
""
]
] | This work is focused on the study of early time cosmology and in particular on the study of inflation. After an introduction on the standard Big Bang theory, we discuss the physics of CMB and we explain how its observations can be used to set constraints on cosmological models. We introduce inflation and we carry out i... |
gr-qc/0508098 | Andrew Moylan | A. Moylan, S.M. Scott and A.C. Searle | Developments in GRworkbench | 14 pages. To appear A. Moylan, S.M. Scott and A.C. Searle,
Developments in GRworkbench. Proceedings of the Tenth Marcel Grossmann
Meeting on General Relativity, editors M. Novello, S. Perez-Bergliaffa and R.
Ruffini. Singapore: World Scientific 2005 | null | 10.1142/9789812704030_0019 | null | gr-qc | null | The software tool GRworkbench is an ongoing project in visual, numerical
General Relativity at The Australian National University. Recently, GRworkbench
has been significantly extended to facilitate numerical experimentation in
analytically-defined space-times. The numerical differential geometric engine
has been rew... | [
{
"created": "Wed, 24 Aug 2005 03:26:07 GMT",
"version": "v1"
}
] | 2016-11-09 | [
[
"Moylan",
"A.",
""
],
[
"Scott",
"S. M.",
""
],
[
"Searle",
"A. C.",
""
]
] | The software tool GRworkbench is an ongoing project in visual, numerical General Relativity at The Australian National University. Recently, GRworkbench has been significantly extended to facilitate numerical experimentation in analytically-defined space-times. The numerical differential geometric engine has been rewri... |
gr-qc/0206010 | Gaurav Khanna | Gaurav Khanna | Collision of spinning black holes in the close limit: The parallel spin
case | 10 pages, 3 figures. Final version (to appear in PRD) | Phys.Rev. D66 (2002) 064004 | 10.1103/PhysRevD.66.064004 | null | gr-qc | null | In this paper we consider the collision of black holes with parallel spins
using first order perturbation theory of rotating black holes (Teukolsky
formalism). The black holes are assumed to be close to each other, initially
non boosted and spinning slowly. We estimate the properties of the
gravitational radiation re... | [
{
"created": "Mon, 3 Jun 2002 23:26:37 GMT",
"version": "v1"
},
{
"created": "Fri, 23 Aug 2002 13:17:53 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Khanna",
"Gaurav",
""
]
] | In this paper we consider the collision of black holes with parallel spins using first order perturbation theory of rotating black holes (Teukolsky formalism). The black holes are assumed to be close to each other, initially non boosted and spinning slowly. We estimate the properties of the gravitational radiation rele... |
0712.3846 | Piotr T. Chru\'sciel | Piotr T. Chru\'sciel and Paul Tod | On Mason's rigidity theorem | minor typos corrected | Commun.Math.Phys.285:1-29,2009 | 10.1007/s00220-008-0643-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Following an argument proposed by Mason, we prove that there are no
algebraically special asymptotically simple vacuum space-times with a smooth,
shear-free, geodesic congruence of principal null directions extending
transversally to a cross-section of Scri. Our analysis leaves the door open for
escaping this conclus... | [
{
"created": "Sat, 22 Dec 2007 10:43:39 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Oct 2008 08:36:00 GMT",
"version": "v2"
}
] | 2008-12-18 | [
[
"Chruściel",
"Piotr T.",
""
],
[
"Tod",
"Paul",
""
]
] | Following an argument proposed by Mason, we prove that there are no algebraically special asymptotically simple vacuum space-times with a smooth, shear-free, geodesic congruence of principal null directions extending transversally to a cross-section of Scri. Our analysis leaves the door open for escaping this conclusio... |
1601.03862 | Del Rajan | Del Rajan | Complex Spacetimes and the Newman-Janis trick | 128 pages, Victoria University of Wellington | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this thesis, we explore the subject of complex spacetimes, in which the
mathematical theory of complex manifolds gets modified for application to
General Relativity. We will also explore the mysterious Newman-Janis trick,
which is an elementary and quite short method to obtain the Kerr black hole
from the Schwarzs... | [
{
"created": "Fri, 15 Jan 2016 10:16:43 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Mar 2017 23:21:03 GMT",
"version": "v2"
}
] | 2017-03-28 | [
[
"Rajan",
"Del",
""
]
] | In this thesis, we explore the subject of complex spacetimes, in which the mathematical theory of complex manifolds gets modified for application to General Relativity. We will also explore the mysterious Newman-Janis trick, which is an elementary and quite short method to obtain the Kerr black hole from the Schwarzsch... |
2401.02898 | Fech Scen Khoo | Fech Scen Khoo, Bahareh Azad, Jose Luis Bl\'azquez-Salcedo, Luis
Manuel Gonz\'alez-Romero, Burkhard Kleihaus, Jutta Kunz, Francisco
Navarro-L\'erida | Quasinormal modes of rapidly rotating Ellis-Bronnikov wormholes | 19 pages, 4 figures, 3 tables; v2: equations added, results
unchanged, matches published version | Phys. Rev. D 109, 084013 (2024) | 10.1103/PhysRevD.109.084013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present for the first time a study of the quasinormal modes of rapidly
rotating Ellis-Bronnikov wormholes in General Relativity. We compute the
spectrum of the wormholes using a spectral decomposition of the metric
perturbations on a numerical background. We focus on the $M_z=2,3$ sector of
the perturbations, and ... | [
{
"created": "Fri, 5 Jan 2024 17:00:05 GMT",
"version": "v1"
},
{
"created": "Mon, 8 Apr 2024 15:34:22 GMT",
"version": "v2"
}
] | 2024-04-09 | [
[
"Khoo",
"Fech Scen",
""
],
[
"Azad",
"Bahareh",
""
],
[
"Blázquez-Salcedo",
"Jose Luis",
""
],
[
"González-Romero",
"Luis Manuel",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Navarro-Lérida",
... | We present for the first time a study of the quasinormal modes of rapidly rotating Ellis-Bronnikov wormholes in General Relativity. We compute the spectrum of the wormholes using a spectral decomposition of the metric perturbations on a numerical background. We focus on the $M_z=2,3$ sector of the perturbations, and sh... |
gr-qc/0606045 | Frank B. Estabrook | Frank B. Estabrook | Classic field theories of gravitation embedded in ten dimensions | 6 pages | null | null | null | gr-qc | null | Two classic field theories of metric gravitation are given as
constant-coefficient Exterior Differential Systems (EDS) on the flat
orthonormal frame bundle over ten dimensional space. They are derivable by
variation of Cartan 4-forms, and shown to be well-posed by calculation of their
Cartan characteristic integers. ... | [
{
"created": "Fri, 9 Jun 2006 21:02:26 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Estabrook",
"Frank B.",
""
]
] | Two classic field theories of metric gravitation are given as constant-coefficient Exterior Differential Systems (EDS) on the flat orthonormal frame bundle over ten dimensional space. They are derivable by variation of Cartan 4-forms, and shown to be well-posed by calculation of their Cartan characteristic integers. Th... |
gr-qc/0001086 | Manuel H. Tiglio | Manuel H. Tiglio | How much energy do closed timelike curves in 2+1 spacetimes need? | 3 pages, with no figures. Accepted in PRD as Rapid Communication | Phys.Rev.D61:081503,2000 | 10.1103/PhysRevD.61.081503 | null | gr-qc | null | By noticing that, in open 2+1 gravity, polarized surfaces cannot converge in
the presence of timelike total energy momentum (except for a rotation of 2 pi),
we give a simple argument which shows that, quite generally, closed timelike
curves cannot exist in the presence of such energy condition.
| [
{
"created": "Thu, 27 Jan 2000 00:32:15 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Tiglio",
"Manuel H.",
""
]
] | By noticing that, in open 2+1 gravity, polarized surfaces cannot converge in the presence of timelike total energy momentum (except for a rotation of 2 pi), we give a simple argument which shows that, quite generally, closed timelike curves cannot exist in the presence of such energy condition. |
0901.3207 | Ion I. Cot{\ba}escu | Ion I. Cotaescu | Polarized vector bosons on the de Sitter expanding universe | 17 pages no figures | Gen.Rel.Grav.42:861-876,2010 | 10.1007/s10714-009-0886-7 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The quantum theory of the vector field minimally coupled to the gravity of
the de Sitter spacetime is built in a canonical manner starting with a new
complete set of quantum modes of given momentum and helicity derived in the
moving chart of conformal time. It is shown that the canonical quantization
leads to new vec... | [
{
"created": "Wed, 21 Jan 2009 09:06:18 GMT",
"version": "v1"
},
{
"created": "Sun, 15 Mar 2009 06:47:38 GMT",
"version": "v2"
},
{
"created": "Fri, 11 Sep 2009 06:27:02 GMT",
"version": "v3"
}
] | 2010-04-14 | [
[
"Cotaescu",
"Ion I.",
""
]
] | The quantum theory of the vector field minimally coupled to the gravity of the de Sitter spacetime is built in a canonical manner starting with a new complete set of quantum modes of given momentum and helicity derived in the moving chart of conformal time. It is shown that the canonical quantization leads to new vecto... |
0908.0337 | Thomas W. Baumgarte | Jason D. Immerman and Thomas W. Baumgarte | Trumpet-puncture initial data for black holes | 6 pages, 5 figures, published version | Phys.Rev.D80:061501,2009 | 10.1103/PhysRevD.80.061501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new approach, based on the puncture method, to construct black
hole initial data in the so-called trumpet geometry, i.e. on slices that
asymptote to a limiting surface of non-zero areal radius. Our approach is easy
to implement numerically and, at least for non-spinning black holes, does not
require any ... | [
{
"created": "Mon, 3 Aug 2009 20:11:46 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Oct 2009 21:33:47 GMT",
"version": "v2"
}
] | 2009-10-20 | [
[
"Immerman",
"Jason D.",
""
],
[
"Baumgarte",
"Thomas W.",
""
]
] | We propose a new approach, based on the puncture method, to construct black hole initial data in the so-called trumpet geometry, i.e. on slices that asymptote to a limiting surface of non-zero areal radius. Our approach is easy to implement numerically and, at least for non-spinning black holes, does not require any in... |
1512.06977 | Atsushi Naruko | Atsushi Naruko, Daisuke Yoshida and Shinji Mukohyama | Gravitational scalar-tensor theory | 6 pages | null | 10.1088/0264-9381/33/9/09LT01 | YITP-15-117, IPMU 15-0211 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a new form of theories of gravity in which the action is written
in terms of the Ricci scalar and its first and second derivatives. Despite the
higher derivative nature of the action, the theory is free from ghost under an
appropriate choice of the functional form of the Lagrangian. This model
possesses $... | [
{
"created": "Tue, 22 Dec 2015 07:48:11 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Apr 2019 02:07:24 GMT",
"version": "v2"
}
] | 2019-04-24 | [
[
"Naruko",
"Atsushi",
""
],
[
"Yoshida",
"Daisuke",
""
],
[
"Mukohyama",
"Shinji",
""
]
] | We consider a new form of theories of gravity in which the action is written in terms of the Ricci scalar and its first and second derivatives. Despite the higher derivative nature of the action, the theory is free from ghost under an appropriate choice of the functional form of the Lagrangian. This model possesses $2+... |
gr-qc/0302069 | Grigori Volovik | G.E. Volovik | Evolution of cosmological constant in effective gravity | LaTeX file, 5 pages, no figures, version submitted to JETP Letters | Pisma Zh.Eksp.Teor.Fiz. 77 (2003) 407-411; JETP Lett. 77 (2003)
339-343 | 10.1134/1.1581956 | null | gr-qc cond-mat hep-ph | null | In contrast to the phenomenon of nullification of the cosmological constant
in the equilibrium vacuum, which is the general property of any quantum vacuum,
there are many options in modifying the Einstein equation to allow the
cosmological constant to evolve in a non-equilibrium vacuum. An attempt is made
to extend t... | [
{
"created": "Mon, 17 Feb 2003 15:57:49 GMT",
"version": "v1"
},
{
"created": "Wed, 5 Mar 2003 12:40:32 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Volovik",
"G. E.",
""
]
] | In contrast to the phenomenon of nullification of the cosmological constant in the equilibrium vacuum, which is the general property of any quantum vacuum, there are many options in modifying the Einstein equation to allow the cosmological constant to evolve in a non-equilibrium vacuum. An attempt is made to extend the... |
gr-qc/9510027 | Shigemot | M. Kenmoku, K. Otsuki, K. Shigemoto and K. Uehara | Classical and Quantum Solutions and the Problem of Time in $R^2$
Cosmology | 17 pages, latex, no figure, one reference is corrected | Class.Quant.Grav. 13 (1996) 1751-1760 | 10.1088/0264-9381/13/7/008 | NWU-11/95 | gr-qc | null | We have studied various classical solutions in $R^2$ cosmology. Especially we
have obtained general classical solutions in pure $R^2$\ cosmology. Even in the
quantum theory, we can solve the Wheeler-DeWitt equation in pure $R^2$\
cosmology exactly. Comparing these classical and quantum solutions in $R^2$\
cosmology, ... | [
{
"created": "Mon, 16 Oct 1995 07:21:31 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Oct 1995 08:25:12 GMT",
"version": "v2"
}
] | 2009-10-28 | [
[
"Kenmoku",
"M.",
""
],
[
"Otsuki",
"K.",
""
],
[
"Shigemoto",
"K.",
""
],
[
"Uehara",
"K.",
""
]
] | We have studied various classical solutions in $R^2$ cosmology. Especially we have obtained general classical solutions in pure $R^2$\ cosmology. Even in the quantum theory, we can solve the Wheeler-DeWitt equation in pure $R^2$\ cosmology exactly. Comparing these classical and quantum solutions in $R^2$\ cosmology, we... |
1502.07672 | Antonio Enea Romano | Antonio Enea Romano, Sergio Andres Vallejo | Low red-shift effects of local structure on the Hubble parameter in
presence of a cosmological constant | 14 pages, 4 figures | null | 10.1140/epjc/s10052-016-4033-9 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In order to estimate the effects of local structure on the Hubble parameter
we calculate the low-redshift expansion for $H(z)$ and $\frac{\delta H}{H}$ for
an observer at the center of a spherically symmetric matter distribution in
presence of a cosmological constant. We then test the accuracy of the formulae
compari... | [
{
"created": "Wed, 25 Feb 2015 01:24:52 GMT",
"version": "v1"
},
{
"created": "Tue, 3 Mar 2015 04:06:42 GMT",
"version": "v2"
},
{
"created": "Fri, 24 Jul 2015 07:50:48 GMT",
"version": "v3"
},
{
"created": "Tue, 26 Apr 2016 06:21:33 GMT",
"version": "v4"
}
] | 2016-07-29 | [
[
"Romano",
"Antonio Enea",
""
],
[
"Vallejo",
"Sergio Andres",
""
]
] | In order to estimate the effects of local structure on the Hubble parameter we calculate the low-redshift expansion for $H(z)$ and $\frac{\delta H}{H}$ for an observer at the center of a spherically symmetric matter distribution in presence of a cosmological constant. We then test the accuracy of the formulae comparing... |
1610.04094 | Andrea Addazi AndAdd | Andrea Addazi | (Anti)evaporation of Dyonic Black Holes in string-inspired dilaton
$f(R)$-gravity | null | null | 10.1142/S0217751X17501020 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss dyonic black hole solutions in the case of $f(R)$-gravity coupled
with a dilaton and two gauge bosons. The study of such a model is highly
motivated from string theory. Our Black Hole solutions are extensions of the
one firstly studied by Kallosh, Linde, Ort\'in, Peet and Van Proyen (KLOPV) in
[arXiv:hep-t... | [
{
"created": "Thu, 13 Oct 2016 14:22:29 GMT",
"version": "v1"
}
] | 2017-07-05 | [
[
"Addazi",
"Andrea",
""
]
] | We discuss dyonic black hole solutions in the case of $f(R)$-gravity coupled with a dilaton and two gauge bosons. The study of such a model is highly motivated from string theory. Our Black Hole solutions are extensions of the one firstly studied by Kallosh, Linde, Ort\'in, Peet and Van Proyen (KLOPV) in [arXiv:hep-th/... |
2209.00770 | Eduardo Bittencourt | \'Erico Goulart, Eduardo Bittencourt, Elliton O. S. Brand\~ao | Light propagation in (2+1)-dimensional electrodynamics: the case of
linear constitutive laws | 12 pages, matching the published version | Phys. Rev. A 106 063521 (2022) | 10.1103/PhysRevA.106.063521 | null | gr-qc math-ph math.MP physics.optics | http://creativecommons.org/licenses/by/4.0/ | In this paper, we turn our attention to light propagation in
three-dimensional electrodynamics. More specifically, we investigate the
behavior of light rays in a continuous bi-dimensional hypothetical medium
living in a three-dimensional ambient spacetime. Relying on a fully covariant
approach, we assume that the med... | [
{
"created": "Fri, 2 Sep 2022 01:04:19 GMT",
"version": "v1"
},
{
"created": "Sat, 31 Dec 2022 18:02:54 GMT",
"version": "v2"
}
] | 2023-01-03 | [
[
"Goulart",
"Érico",
""
],
[
"Bittencourt",
"Eduardo",
""
],
[
"Brandão",
"Elliton O. S.",
""
]
] | In this paper, we turn our attention to light propagation in three-dimensional electrodynamics. More specifically, we investigate the behavior of light rays in a continuous bi-dimensional hypothetical medium living in a three-dimensional ambient spacetime. Relying on a fully covariant approach, we assume that the mediu... |
1607.08537 | Fan Zhang | Fan Zhang | Accumulative coupling between magnetized tenuous plasma and
gravitational waves | 10 pages, 1 figure | Phys. Rev. D 94, 024048 (2016) | 10.1103/PhysRevD.94.024048 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explicitly compute the plasma wave (PW) induced by a plane gravitational
wave (GW) travelling through a region of strongly magnetized plasma, governed
by force-free electrodynamics. The PW co-moves with the GW and absorbs its
energy to grow over time, creating an essentially force-free counterpart to the
inverse-G... | [
{
"created": "Thu, 28 Jul 2016 17:05:30 GMT",
"version": "v1"
}
] | 2016-07-29 | [
[
"Zhang",
"Fan",
""
]
] | We explicitly compute the plasma wave (PW) induced by a plane gravitational wave (GW) travelling through a region of strongly magnetized plasma, governed by force-free electrodynamics. The PW co-moves with the GW and absorbs its energy to grow over time, creating an essentially force-free counterpart to the inverse-Ger... |
2405.19006 | Guglielmo Faggioli | Guglielmo Faggioli, Maarten van de Meent, Alessandra Buonanno, Aldo
Gamboa, Mohammed Khalil, Gaurav Khanna | Testing eccentric corrections to the radiation-reaction force in the
test-mass limit of effective-one-body models | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we test an effective-one-body radiation-reaction force for
eccentric planar orbits of a test mass in a Kerr background, which contains
third-order post-Newtonian (PN) non-spinning and second-order PN spin
contributions. We compare the analytical fluxes connected to two different
resummations of this for... | [
{
"created": "Wed, 29 May 2024 11:45:09 GMT",
"version": "v1"
}
] | 2024-05-30 | [
[
"Faggioli",
"Guglielmo",
""
],
[
"van de Meent",
"Maarten",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Gamboa",
"Aldo",
""
],
[
"Khalil",
"Mohammed",
""
],
[
"Khanna",
"Gaurav",
""
]
] | In this work, we test an effective-one-body radiation-reaction force for eccentric planar orbits of a test mass in a Kerr background, which contains third-order post-Newtonian (PN) non-spinning and second-order PN spin contributions. We compare the analytical fluxes connected to two different resummations of this force... |
2311.01495 | Kiana Salehi | Kiana Salehi, Avery Broderick and Boris Georgiev | Photon Rings and Shadow Size for General Integrable Spacetimes | null | null | null | null | gr-qc astro-ph.HE | http://creativecommons.org/licenses/by/4.0/ | There are now multiple direct probes of the region near black hole horizons,
including direct imaging with the Event Horizon Telescope (EHT). As a result,
it is now of considerable interest to identify what aspects of the underlying
spacetime are constrained by these observations. For this purpose, we present a
new f... | [
{
"created": "Thu, 2 Nov 2023 18:00:00 GMT",
"version": "v1"
}
] | 2023-11-06 | [
[
"Salehi",
"Kiana",
""
],
[
"Broderick",
"Avery",
""
],
[
"Georgiev",
"Boris",
""
]
] | There are now multiple direct probes of the region near black hole horizons, including direct imaging with the Event Horizon Telescope (EHT). As a result, it is now of considerable interest to identify what aspects of the underlying spacetime are constrained by these observations. For this purpose, we present a new for... |
gr-qc/9911025 | Alexander N. Petrov | A. N. Petrov (1) and J. Katz (2) ((1) Sternberg Astronomical
Institute, Moscow (2) Racah Institute of Physics, Jerusalem) | Relativistic Conservation Laws on Curved Backgrounds and the Theory of
Cosmological Perturbations | 38 pages, plain TEX | Proc.Roy.Soc.Lond.458:319-337,2002 | 10.1098/rspa.2001.0865 | null | gr-qc | null | We first consider the Lagrangian formulation of general relativity for
perturbations with respect to a background spacetime. We show that by combining
Noether's method with Belinfante's "symmetrization'' procedure we obtain
conserved vectors that are independent of any divergence added to the perturbed
Hilbert Lagran... | [
{
"created": "Mon, 8 Nov 1999 13:47:09 GMT",
"version": "v1"
},
{
"created": "Fri, 12 Nov 1999 16:13:02 GMT",
"version": "v2"
},
{
"created": "Sun, 24 Jun 2001 11:38:15 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"Petrov",
"A. N.",
""
],
[
"Katz",
"J.",
""
]
] | We first consider the Lagrangian formulation of general relativity for perturbations with respect to a background spacetime. We show that by combining Noether's method with Belinfante's "symmetrization'' procedure we obtain conserved vectors that are independent of any divergence added to the perturbed Hilbert Lagrangi... |
1706.04920 | Martin Kr\v{s}\v{s}\'ak | Sebastian Bahamonde, Christian G. Boehmer, Martin Krssak | New classes of modified teleparallel gravity models | v2: 10 pages, accepted for publication in PLB; for a detailed
derivation of the field equations see Appendix A in v1 | Phys.Lett. B775 (2017) 37-43 | 10.1016/j.physletb.2017.10.026 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | New classes of modified teleparallel theories of gravity are introduced. The
action of this theory is constructed to be a function of the irreducible parts
of torsion $f(T_{\rm ax},T_{\rm ten},T_{\rm vec})$, where $T_{\rm ax},T_{\rm
ten}$ and $T_{\rm vec}$ are squares of the axial, tensor and vector components
of tor... | [
{
"created": "Thu, 15 Jun 2017 15:19:42 GMT",
"version": "v1"
},
{
"created": "Sun, 22 Oct 2017 01:54:34 GMT",
"version": "v2"
}
] | 2017-10-31 | [
[
"Bahamonde",
"Sebastian",
""
],
[
"Boehmer",
"Christian G.",
""
],
[
"Krssak",
"Martin",
""
]
] | New classes of modified teleparallel theories of gravity are introduced. The action of this theory is constructed to be a function of the irreducible parts of torsion $f(T_{\rm ax},T_{\rm ten},T_{\rm vec})$, where $T_{\rm ax},T_{\rm ten}$ and $T_{\rm vec}$ are squares of the axial, tensor and vector components of torsi... |
2303.11104 | Shahram Jalalzadeh | Shahram Jalalzadeh | Intrinsic quantum dynamics of particles in brane gravity | 17 pages, 4 figures, to appear in Annal of Physics | Ann. Phys. (2023) 452, 169291 | 10.1016/j.aop.2023.169291 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Newtonian dynamics of particles in brane gravity is investigated. Due to
the coupling of the particles' energy-momentum tensor to the tension of the
brane, the particle is semi-confined and oscillates along the extra dimension.
We demonstrate that the frequency of these oscillations is proportional to the
kinetic... | [
{
"created": "Mon, 20 Mar 2023 13:41:07 GMT",
"version": "v1"
}
] | 2023-04-04 | [
[
"Jalalzadeh",
"Shahram",
""
]
] | The Newtonian dynamics of particles in brane gravity is investigated. Due to the coupling of the particles' energy-momentum tensor to the tension of the brane, the particle is semi-confined and oscillates along the extra dimension. We demonstrate that the frequency of these oscillations is proportional to the kinetic e... |
1001.2616 | Ngangbam Ibohal | Ng. Ibohal and L. Kapil | Charged black holes in Vaidya backgrounds: Hawking's Radiation | 30 pages, latex file, no figures | Int.J.Mod.Phys.D19:437-464,2010 | 10.1142/S0218271810016518 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we propose a class of embedded solutions of Einstein's field
equations describing non-rotating Reissner-Nordstrom-Vaidya and rotating
Kerr-Newman-Vaidya black holes.
| [
{
"created": "Fri, 15 Jan 2010 06:19:41 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Ibohal",
"Ng.",
""
],
[
"Kapil",
"L.",
""
]
] | In this paper we propose a class of embedded solutions of Einstein's field equations describing non-rotating Reissner-Nordstrom-Vaidya and rotating Kerr-Newman-Vaidya black holes. |
1904.10248 | James Edholm | James Edholm | Infinite Derivative Gravity: A finite number of predictions | Doctoral thesis | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Ghost-free Infinite Derivative Gravity (IDG) is a modified gravity theory
which can avoid the singularities predicted by General Relativity. This thesis
examines the effect of IDG on four areas of importance for theoretical
cosmologists and experimentalists. First, the gravitational potential produced
by a point sour... | [
{
"created": "Tue, 23 Apr 2019 11:18:59 GMT",
"version": "v1"
},
{
"created": "Sat, 2 Nov 2019 16:29:39 GMT",
"version": "v2"
}
] | 2019-11-05 | [
[
"Edholm",
"James",
""
]
] | Ghost-free Infinite Derivative Gravity (IDG) is a modified gravity theory which can avoid the singularities predicted by General Relativity. This thesis examines the effect of IDG on four areas of importance for theoretical cosmologists and experimentalists. First, the gravitational potential produced by a point source... |
1909.13393 | Yan Peng | Yan Peng | Stationary scalar hairy configurations supported by Neumann compact
stars | 10 pages, 1 figure | Nuclear Physics B 950(2020)114879 | 10.1016/j.nuclphysb.2019.114879 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study stationary scalar field hairy configurations supported by
asymptotically flat horizonless compact stars. At the star surface, we impose
Neumann boundary conditions for the scalar field. With analytical methods, we
obtain bounds on the frequency of scalar fields. For certain discrete frequency
satisfying the ... | [
{
"created": "Sun, 29 Sep 2019 22:51:35 GMT",
"version": "v1"
},
{
"created": "Sat, 7 Dec 2019 03:47:30 GMT",
"version": "v2"
}
] | 2019-12-10 | [
[
"Peng",
"Yan",
""
]
] | We study stationary scalar field hairy configurations supported by asymptotically flat horizonless compact stars. At the star surface, we impose Neumann boundary conditions for the scalar field. With analytical methods, we obtain bounds on the frequency of scalar fields. For certain discrete frequency satisfying the bo... |
gr-qc/9801037 | Mike Grebeniuk | V.N. Melnikov | Multidimensional Gravity and Cosmology: Exact Solutions | 17 pages, Latex. To appear in Proceedings of MG8 Meeting, Jerusalem,
1997 (World Scientific, Singapore) | null | null | null | gr-qc | null | A short review of recent results on exact solutions in multidimensional
cosmology and overview of reports at workshop in MG8 (held by the author) are
presented.
| [
{
"created": "Mon, 12 Jan 1998 16:29:57 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Melnikov",
"V. N.",
""
]
] | A short review of recent results on exact solutions in multidimensional cosmology and overview of reports at workshop in MG8 (held by the author) are presented. |
gr-qc/9906092 | Piotr Jaranowski | Piotr Jaranowski and Gerhard Sch\"afer | The binary black-hole problem at the third post-Newtonian approximation
in the orbital motion: Static part | LaTeX, 9 pages, to be submitted to Physical Review D | Phys.Rev.D60:124003,1999 | 10.1103/PhysRevD.60.124003 | null | gr-qc | null | Post-Newtonian expansions of the Brill-Lindquist and Misner-Lindquist
solutions of the time-symmetric two-black-hole initial value problem are
derived. The static Hamiltonians related to the expanded solutions, after
identifying the bare masses in both solutions, are found to differ from each
other at the third post-... | [
{
"created": "Wed, 23 Jun 1999 09:30:58 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Jaranowski",
"Piotr",
""
],
[
"Schäfer",
"Gerhard",
""
]
] | Post-Newtonian expansions of the Brill-Lindquist and Misner-Lindquist solutions of the time-symmetric two-black-hole initial value problem are derived. The static Hamiltonians related to the expanded solutions, after identifying the bare masses in both solutions, are found to differ from each other at the third post-Ne... |
2008.05331 | Juan M. Z\'arate Pretel | Juan M. Z. Pretel | Equilibrium, radial stability and non-adiabatic gravitational collapse
of anisotropic neutron stars | 17 pages, 7 figures | Eur. Phys. J. C 80 (2020) 726 | 10.1140/epjc/s10052-020-8301-3 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we construct families of anisotropic neutron stars for an
equation of state compatible with the constraints of the gravitational-wave
event GW170817 and for four anisotropy ansatze. Such stars are subjected to a
radial perturbation in order to study their stability against radial
oscillations and we deve... | [
{
"created": "Wed, 12 Aug 2020 14:12:05 GMT",
"version": "v1"
}
] | 2020-08-13 | [
[
"Pretel",
"Juan M. Z.",
""
]
] | In this work we construct families of anisotropic neutron stars for an equation of state compatible with the constraints of the gravitational-wave event GW170817 and for four anisotropy ansatze. Such stars are subjected to a radial perturbation in order to study their stability against radial oscillations and we develo... |
1404.4195 | Ola Malaeb | O. Malaeb | Hamiltonian Formulation of Mimetic Gravity | null | Phys. Rev. D 91, 103526 (2015) | 10.1103/PhysRevD.91.103526 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Hamiltonian formulation of Mimetic Gravity is formulated. Although there
are two more equations than those of general relativity, these are proved to be
the constraint equation and the conservation of energy-momentum tensor. The
Poisson brackets are then computed and closure is proved. At the end,
Wheeler-DeWitt ... | [
{
"created": "Wed, 16 Apr 2014 10:38:08 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Apr 2015 13:15:38 GMT",
"version": "v2"
}
] | 2015-05-27 | [
[
"Malaeb",
"O.",
""
]
] | The Hamiltonian formulation of Mimetic Gravity is formulated. Although there are two more equations than those of general relativity, these are proved to be the constraint equation and the conservation of energy-momentum tensor. The Poisson brackets are then computed and closure is proved. At the end, Wheeler-DeWitt eq... |
1607.01442 | Douglas A. Singleton | Douglas Singleton and Steve Wilburn | Global versus Local -- Mach's Principle versus the Equivalence Principle | 9 pages revtex, no figures. Awarded an "honorable mention" in the
Gravity Research Foundation 2016 Essays on Gravitation contest. To be
published in special edition of IJMPD | null | 10.1142/S0218271816440090 | null | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The equivalence principle is the conceptual basis for general relativity. In
contrast Mach's principle, although said to have been influential on Einstein
in his formulation of general relativity, has not been shown to be central to
the structure of general relativity. In this essay we suggest that the quantum
effect... | [
{
"created": "Wed, 6 Jul 2016 00:06:03 GMT",
"version": "v1"
}
] | 2016-11-15 | [
[
"Singleton",
"Douglas",
""
],
[
"Wilburn",
"Steve",
""
]
] | The equivalence principle is the conceptual basis for general relativity. In contrast Mach's principle, although said to have been influential on Einstein in his formulation of general relativity, has not been shown to be central to the structure of general relativity. In this essay we suggest that the quantum effects ... |
gr-qc/0304064 | Hideo Kodama | Hideo Kodama and Wataru Hikida (YITP, Kyoto University) | Global structure of the Zipoy-Voorhees-Weyl spacetime and the delta=2
Tomimatsu-Sato spacetime | 20 pages, 11 figures. The title was slightly changed, and references
were added. The published version | Class.Quant.Grav. 20:5121-5140,2003 | 10.1088/0264-9381/20/23/011 | null | gr-qc astro-ph | null | We investigate the structure of the ZVW (Zipoy-Voorhees-Weyl) spacetime,
which is a Weyl solution described by the Zipoy-Voorhees metric, and the
delta=2 Tomimatsu-Sato spacetime. We show that the singularity of the ZVW
spacetime, which is represented by a segment rho=0, -sigma<z<sigma in the Weyl
coordinates, is geo... | [
{
"created": "Thu, 17 Apr 2003 10:28:43 GMT",
"version": "v1"
},
{
"created": "Fri, 31 Oct 2003 17:26:17 GMT",
"version": "v2"
}
] | 2011-01-27 | [
[
"Kodama",
"Hideo",
"",
"YITP, Kyoto University"
],
[
"Hikida",
"Wataru",
"",
"YITP, Kyoto University"
]
] | We investigate the structure of the ZVW (Zipoy-Voorhees-Weyl) spacetime, which is a Weyl solution described by the Zipoy-Voorhees metric, and the delta=2 Tomimatsu-Sato spacetime. We show that the singularity of the ZVW spacetime, which is represented by a segment rho=0, -sigma<z<sigma in the Weyl coordinates, is geome... |
1108.3512 | Andrew J. S. Hamilton | Andrew J. S. Hamilton | Towards a general description of the interior structure of rotating
black holes | 15 pages | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this paper is to present a number of proposals about the
interior structure of a rotating black hole that is accreting slowly, but in an
arbitrary time- and space-dependent fashion. The proposals could potentially be
tested with numerical simulations. Outgoing and ingoing particles free-falling
in the ... | [
{
"created": "Wed, 17 Aug 2011 15:57:53 GMT",
"version": "v1"
}
] | 2011-08-22 | [
[
"Hamilton",
"Andrew J. S.",
""
]
] | The purpose of this paper is to present a number of proposals about the interior structure of a rotating black hole that is accreting slowly, but in an arbitrary time- and space-dependent fashion. The proposals could potentially be tested with numerical simulations. Outgoing and ingoing particles free-falling in the pa... |
1410.8643 | Jiro Soda | Jiro Soda | Anisotropic Power-law Inflation: A counter example to the cosmic no-hair
conjecture | 6 pages, 1 figure, Conference proceedings for the Spanish Relativity
Meeting (ERE 2014), Valencia, Spain, 1-5 Sept. 2014 | null | 10.1088/1742-6596/600/1/012026 | KOBE-TH-14-10 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is widely believed that anisotropy in the expansion of the universe will
decay exponentially fast during inflation. This is often referred to as the
cosmic no-hair conjecture. However, we find a counter example to the cosmic
no-hair conjecture in the context of supergravity. As a demonstration, we
present an exact... | [
{
"created": "Fri, 31 Oct 2014 05:13:37 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Soda",
"Jiro",
""
]
] | It is widely believed that anisotropy in the expansion of the universe will decay exponentially fast during inflation. This is often referred to as the cosmic no-hair conjecture. However, we find a counter example to the cosmic no-hair conjecture in the context of supergravity. As a demonstration, we present an exact a... |
2103.06724 | Georgios Lukes-Gerakopoulos | Georgios Lukes-Gerakopoulos and Vojt\v{e}ch Witzany | Non-linear effects in EMRI dynamics and their imprints on gravitational
waves | 44 pages, 9 figures, 1 table. Invited chapter for "Handbook of
Gravitational Wave Astronomy" (Eds. C. Bambi, S. Katsanevas, and K. Kokkotas;
Springer, Singapore, 2021) | null | 10.1007/978-981-15-4702-7_42-1 | null | gr-qc astro-ph.HE nlin.CD | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The largest part of any gravitational-wave inspiral of a compact binary can
be understood as a slow, adiabatic drift between the trajectories of a certain
referential conservative system. In many contexts, the phase space of this
conservative system is smooth and there are no "topological transitions" in the
phase sp... | [
{
"created": "Thu, 11 Mar 2021 15:17:15 GMT",
"version": "v1"
}
] | 2021-11-23 | [
[
"Lukes-Gerakopoulos",
"Georgios",
""
],
[
"Witzany",
"Vojtěch",
""
]
] | The largest part of any gravitational-wave inspiral of a compact binary can be understood as a slow, adiabatic drift between the trajectories of a certain referential conservative system. In many contexts, the phase space of this conservative system is smooth and there are no "topological transitions" in the phase spac... |
0806.3293 | Samuel E. Gralla | Samuel E. Gralla and Robert M. Wald | A Rigorous Derivation of Gravitational Self-force | typos fixed; errors in equations corrected; notes added to text | Class.Quant.Grav.25:205009,2008; Erratum-ibid.28:159501,2011 | 10.1088/0264-9381/25/20/205009 10.1088/0264-9381/28/15/159501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There is general agreement that the MiSaTaQuWa equations should describe the
motion of a "small body" in general relativity, taking into account the leading
order self-force effects. However, previous derivations of these equations have
made a number of ad hoc assumptions and/or contain a number of unsatisfactory
fea... | [
{
"created": "Thu, 19 Jun 2008 22:03:30 GMT",
"version": "v1"
},
{
"created": "Mon, 21 Jul 2008 14:50:18 GMT",
"version": "v2"
},
{
"created": "Mon, 18 Aug 2008 22:23:07 GMT",
"version": "v3"
},
{
"created": "Thu, 11 Sep 2008 21:05:54 GMT",
"version": "v4"
},
{
"c... | 2011-06-30 | [
[
"Gralla",
"Samuel E.",
""
],
[
"Wald",
"Robert M.",
""
]
] | There is general agreement that the MiSaTaQuWa equations should describe the motion of a "small body" in general relativity, taking into account the leading order self-force effects. However, previous derivations of these equations have made a number of ad hoc assumptions and/or contain a number of unsatisfactory featu... |
gr-qc/0504104 | Sunil Maharaj | S. Hansraj, S. D. Maharaj, A. M. Msomi and K. S. Govinder | Lie symmetries for equations in conformal geometries | 19 pages, To appear in J. Phys. A | J.Phys. A38 (2005) 4419-4432 | 10.1088/0305-4470/38/20/009 | null | gr-qc | null | We seek exact solutions to the Einstein field equations which arise when two
spacetime geometries are conformally related. Whilst this is a simple method to
generate new solutions to the field equations, very few such examples have been
found in practice. We use the method of Lie analysis of differential equations
to... | [
{
"created": "Thu, 21 Apr 2005 13:36:44 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Hansraj",
"S.",
""
],
[
"Maharaj",
"S. D.",
""
],
[
"Msomi",
"A. M.",
""
],
[
"Govinder",
"K. S.",
""
]
] | We seek exact solutions to the Einstein field equations which arise when two spacetime geometries are conformally related. Whilst this is a simple method to generate new solutions to the field equations, very few such examples have been found in practice. We use the method of Lie analysis of differential equations to o... |
gr-qc/9903089 | Petr Hajicek | Petr Hajicek (University of Berne, Switzerland) | Choice of Gauge in Quantum Gravity | Latex, 8 pages, no figures, Europian size (to get American size,
delete the preambel) | null | null | BUTP-99/05 | gr-qc | null | This paper is an extended version of the talk given at 19th Texas Symposium
of Relativistic Astrophysics and Cosmology, Paris, 1998. It reviews of some
recent work; mathematical details are skipped. It is well-known that a choice
of gauge in generally covariant models has a twofold pupose: not only to render
the dyna... | [
{
"created": "Wed, 24 Mar 1999 09:54:59 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Hajicek",
"Petr",
"",
"University of Berne, Switzerland"
]
] | This paper is an extended version of the talk given at 19th Texas Symposium of Relativistic Astrophysics and Cosmology, Paris, 1998. It reviews of some recent work; mathematical details are skipped. It is well-known that a choice of gauge in generally covariant models has a twofold pupose: not only to render the dynami... |
gr-qc/0103062 | Zeferino Andrade | Zeferino Andrade | Trapped and excited w modes of stars with a phase transition and R>=5M | To appear in Physical Review D | Phys.Rev. D63 (2001) 124002 | 10.1103/PhysRevD.63.124002 | null | gr-qc astro-ph | null | The trapped $w$-modes of stars with a first order phase transition (a density
discontinuity) are computed and the excitation of some of the modes of these
stars by a perturbing shell is investigated. Attention is restricted to odd
parity (``axial'') $w$-modes. With $R$ the radius of the star, $M$ its mass,
$R_{i}$ th... | [
{
"created": "Fri, 16 Mar 2001 13:42:29 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Andrade",
"Zeferino",
""
]
] | The trapped $w$-modes of stars with a first order phase transition (a density discontinuity) are computed and the excitation of some of the modes of these stars by a perturbing shell is investigated. Attention is restricted to odd parity (``axial'') $w$-modes. With $R$ the radius of the star, $M$ its mass, $R_{i}$ the ... |
2010.03299 | Jaros{\l}aw Kopi\'nski | Jaros{\l}aw Kopi\'nski and Juan A. Valiente Kroon | New spinorial approach to mass inequalities for black holes in general
relativity | v3: minor corrections | Phys. Rev. D 103, 024057 (2021) | 10.1103/PhysRevD.103.024057 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A new spinorial strategy for the construction of geometric inequalities
involving the Arnowitt-Deser-Misner (ADM) mass of black hole systems in general
relativity is presented. This approach is based on a second order elliptic
equation (the approximate twistor equation) for a valence 1 Weyl spinor. This
has the advan... | [
{
"created": "Wed, 7 Oct 2020 09:25:36 GMT",
"version": "v1"
},
{
"created": "Sun, 24 Jan 2021 11:18:49 GMT",
"version": "v2"
},
{
"created": "Tue, 30 May 2023 08:51:54 GMT",
"version": "v3"
}
] | 2023-05-31 | [
[
"Kopiński",
"Jarosław",
""
],
[
"Kroon",
"Juan A. Valiente",
""
]
] | A new spinorial strategy for the construction of geometric inequalities involving the Arnowitt-Deser-Misner (ADM) mass of black hole systems in general relativity is presented. This approach is based on a second order elliptic equation (the approximate twistor equation) for a valence 1 Weyl spinor. This has the advanta... |
gr-qc/0509067 | David Lonie | G.S. Hall and D.P. Lonie | On the compatibility of Lorentz-metrics with linear connections on
4-dimensional manifolds | LaTex2e, 19 pages, uses iop style files | J.Phys. A39 (2006) 2995-3010 | 10.1088/0305-4470/39/12/009 | null | gr-qc | null | This paper considers 4-dimensional manifolds upon which there is a Lorentz
metric, h, and a symmetric connection and which are originally assumed
unrelated. It then derives sufficient conditions on the metric and connection
(expressed through the curvature tensor) for the connection to be the
Levi-Civita connection o... | [
{
"created": "Fri, 16 Sep 2005 11:49:20 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Hall",
"G. S.",
""
],
[
"Lonie",
"D. P.",
""
]
] | This paper considers 4-dimensional manifolds upon which there is a Lorentz metric, h, and a symmetric connection and which are originally assumed unrelated. It then derives sufficient conditions on the metric and connection (expressed through the curvature tensor) for the connection to be the Levi-Civita connection of ... |
gr-qc/0403054 | Valeri Frolov | Valeri P. Frolov, Dmitri V. Fursaev, and Dejan Stojkovic | Interaction of higher-dimensional rotating black holes with branes | Version published in Class. Quant. Grav | Class.Quant.Grav. 21 (2004) 3483-3498 | 10.1088/0264-9381/21/14/011 | Alberta-Thy-05-04, MCTP-04-20 | gr-qc hep-ph hep-th | null | We study interaction of rotating higher dimensional black holes with a brane
in space-times with large extra dimensions. We demonstrate that in a general
case a rotating black hole attached to a brane can loose bulk components of its
angular momenta. A stationary black hole can have only those components of the
angul... | [
{
"created": "Sat, 13 Mar 2004 00:08:58 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Jun 2004 23:28:06 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Jul 2004 17:10:55 GMT",
"version": "v3"
}
] | 2009-11-10 | [
[
"Frolov",
"Valeri P.",
""
],
[
"Fursaev",
"Dmitri V.",
""
],
[
"Stojkovic",
"Dejan",
""
]
] | We study interaction of rotating higher dimensional black holes with a brane in space-times with large extra dimensions. We demonstrate that in a general case a rotating black hole attached to a brane can loose bulk components of its angular momenta. A stationary black hole can have only those components of the angular... |
gr-qc/0109048 | Valter Moretti | Valter Moretti (Math.Dept.-Trento Univ.) | Comments on the Stress-Energy Tensor Operator in Curved Spacetime | 35 pages, no figure, LaTeX2e. Final form accepted for publication in
Commun.Math.Phys | Commun.Math.Phys. 232 (2003) 189-221 | 10.1007/s00220-002-0702-7 | UTM 601 | gr-qc hep-th math-ph math.MP | null | Hollands and Wald's technique based on *-algebras of Wick products of field
operators is strightforwardly generalized to define the stress-energy tensor
operator in curved globally hyperbolic spacetimes. In particular, the locality
and covariance requirement is generalized to Wick products of differentiated
quantum f... | [
{
"created": "Thu, 13 Sep 2001 14:37:34 GMT",
"version": "v1"
},
{
"created": "Tue, 14 May 2002 15:30:38 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Moretti",
"Valter",
"",
"Math.Dept.-Trento Univ."
]
] | Hollands and Wald's technique based on *-algebras of Wick products of field operators is strightforwardly generalized to define the stress-energy tensor operator in curved globally hyperbolic spacetimes. In particular, the locality and covariance requirement is generalized to Wick products of differentiated quantum fie... |
1104.3719 | Subenoy Chakraborty | Ritabrata biswas, Subenoy Chakraborty | Black Hole Thermodynamics in Horava Lifshitz Gravity and the Related
Geometry | 8 figures | Astrophys.Space Sci.332:193,2011 | 10.1007/s10509-010-0504-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, Ho$\breve{r}$ava proposed a non-relativistic renormalizable theory
of gravity which is essentially a field theoretic model for a UV complete
theory of gravity and reduces to Einstein gravity with a non-vanishing
cosmological constant in IR. Also the theory admits a Lifshitz scale-invariance
in time and spac... | [
{
"created": "Tue, 19 Apr 2011 12:02:11 GMT",
"version": "v1"
}
] | 2015-03-19 | [
[
"biswas",
"Ritabrata",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | Recently, Ho$\breve{r}$ava proposed a non-relativistic renormalizable theory of gravity which is essentially a field theoretic model for a UV complete theory of gravity and reduces to Einstein gravity with a non-vanishing cosmological constant in IR. Also the theory admits a Lifshitz scale-invariance in time and space ... |
gr-qc/0003019 | Lorenzo Fatibene | L. Fatibene, M. Ferraris, M. Francaviglia, M. Raiteri | Noether Charges, Brown-York Quasilocal Energy and Related Topics | 43 pages, 3 figures, PlainTeX file | J.Math.Phys.42:1173-1195,2001 | 10.1063/1.1336514 | null | gr-qc | null | The Lagrangian proposed by York et al. and the covariant first order
Lagrangian for General Relativity are introduced to deal with the (vacuum)
gravitational field on a reference background. The two Lagrangians are compared
and we show that the first one can be obtained from the latter under suitable
hypotheses. The ... | [
{
"created": "Tue, 7 Mar 2000 13:27:05 GMT",
"version": "v1"
}
] | 2014-11-17 | [
[
"Fatibene",
"L.",
""
],
[
"Ferraris",
"M.",
""
],
[
"Francaviglia",
"M.",
""
],
[
"Raiteri",
"M.",
""
]
] | The Lagrangian proposed by York et al. and the covariant first order Lagrangian for General Relativity are introduced to deal with the (vacuum) gravitational field on a reference background. The two Lagrangians are compared and we show that the first one can be obtained from the latter under suitable hypotheses. The in... |
2206.03338 | Masroor C. Pookkillath | Antonio De Felice, Shinji Mukohyama, Masroor C. Pookkillath | Extended minimal theories of massive gravity | 20 pages+appendices, 1 figure | null | 10.1103/PhysRevD.106.084050 | YITP-22-59, IPMU22-0035 | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by/4.0/ | In this work, we introduce a class of extended Minimal Theories of Massive
Gravity (eMTMG), without requiring a priori that the theory should admit the
same homogeneous and isotropic cosmological solutions as the de
Rham-Gabadadze-Tolley massive gravity. The theory is constructed as to have
only two degrees of freedo... | [
{
"created": "Tue, 7 Jun 2022 14:21:50 GMT",
"version": "v1"
}
] | 2022-11-09 | [
[
"De Felice",
"Antonio",
""
],
[
"Mukohyama",
"Shinji",
""
],
[
"Pookkillath",
"Masroor C.",
""
]
] | In this work, we introduce a class of extended Minimal Theories of Massive Gravity (eMTMG), without requiring a priori that the theory should admit the same homogeneous and isotropic cosmological solutions as the de Rham-Gabadadze-Tolley massive gravity. The theory is constructed as to have only two degrees of freedom ... |
2403.13028 | Sujay Kr. Biswas | Goutam Mandal and Sujay Kr. Biswas | Dynamical systems analysis of a cosmological model with interacting
Umami Chaplygin fluid in adiabatic particle creation mechanism: Some bouncing
features | 29 pages, 12 captioned figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present work aims to investigate an interacting Umami Chaplygin gas in
the background dynamics of a spatially flat Friedmann-Lemaitre-Robertson-Walker
(FLRW) universe when adiabatic particle creation is allowed. Here, the universe
is taken to be an open thermodynamical model where the particle is created
irrevers... | [
{
"created": "Tue, 19 Mar 2024 03:27:55 GMT",
"version": "v1"
}
] | 2024-03-21 | [
[
"Mandal",
"Goutam",
""
],
[
"Biswas",
"Sujay Kr.",
""
]
] | The present work aims to investigate an interacting Umami Chaplygin gas in the background dynamics of a spatially flat Friedmann-Lemaitre-Robertson-Walker (FLRW) universe when adiabatic particle creation is allowed. Here, the universe is taken to be an open thermodynamical model where the particle is created irreversib... |
2007.05464 | Marcello Ortaggio | Sigbj{\o}rn Hervik, Marcello Ortaggio | Universal $p$-form black holes in generalized theories of gravity | 15 pages. v2: typos fixed, minor improvements to the text, refs.
added | Eur. Phys. J. C 80, 1020 (2020) | 10.1140/epjc/s10052-020-08571-x | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We explore how far one can go in constructing $d$-dimensional static black
holes coupled to $p$-form and scalar fields before actually specifying the
gravity and electrodynamics theory one wants to solve. At the same time, we
study to what extent one can enlarge the space of black hole solutions by
allowing for horiz... | [
{
"created": "Fri, 10 Jul 2020 16:06:42 GMT",
"version": "v1"
},
{
"created": "Wed, 11 Nov 2020 11:58:18 GMT",
"version": "v2"
}
] | 2020-11-12 | [
[
"Hervik",
"Sigbjørn",
""
],
[
"Ortaggio",
"Marcello",
""
]
] | We explore how far one can go in constructing $d$-dimensional static black holes coupled to $p$-form and scalar fields before actually specifying the gravity and electrodynamics theory one wants to solve. At the same time, we study to what extent one can enlarge the space of black hole solutions by allowing for horizon... |
0808.3828 | Hideyoshi Arakida | Hideyoshi Arakida | Time Delay in Robertson-McVittie Spacetime and its Application to
Increase of Astronomical Unit | 15 pages, 1 figure, accepted for publication in New Astronomy | New Astronomy, Volume 14, Issue 3, p. 264-268 (2009( | 10.1016/j.newast.2008.08.010 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigated the light propagation by means of the Robertson-McVittie
solution which is considered to be the spacetime around the gravitating body
embedded in the FLRW (Friedmann-Lema{\^i}tre-Robertson-Walker) background
metric. We concentrated on the time delay and derived the correction terms with
respect to the... | [
{
"created": "Thu, 28 Aug 2008 06:02:54 GMT",
"version": "v1"
}
] | 2012-02-07 | [
[
"Arakida",
"Hideyoshi",
""
]
] | We investigated the light propagation by means of the Robertson-McVittie solution which is considered to be the spacetime around the gravitating body embedded in the FLRW (Friedmann-Lema{\^i}tre-Robertson-Walker) background metric. We concentrated on the time delay and derived the correction terms with respect to the S... |
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