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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1101.0588 | Eanna E. Flanagan | Wolfgang Tichy, Eanna E. Flanagan | Covariant formulation of the post-1-Newtonian approximation to General
Relativity | 14 pages, no figures, minor corrections, to appear in Phys. Rev. D | Phys.Rev.D84:044038,2011 | 10.1103/PhysRevD.84.044038 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a coordinate-independent formulation of the post-1-Newtonian
approximation to general relativity. This formulation is a generalization of
the Newton-Cartan geometric formulation of Newtonian gravity. It involves
several fields and a connection, but no spacetime metric at the fundamental
level. We show that ... | [
{
"created": "Mon, 3 Jan 2011 20:18:12 GMT",
"version": "v1"
},
{
"created": "Tue, 9 Aug 2011 13:31:56 GMT",
"version": "v2"
}
] | 2011-09-08 | [
[
"Tichy",
"Wolfgang",
""
],
[
"Flanagan",
"Eanna E.",
""
]
] | We derive a coordinate-independent formulation of the post-1-Newtonian approximation to general relativity. This formulation is a generalization of the Newton-Cartan geometric formulation of Newtonian gravity. It involves several fields and a connection, but no spacetime metric at the fundamental level. We show that th... |
2108.13460 | Salah Nasri | Hemza Azri, K. Yavuz Ek\c{s}i, Canan Karahan and Salah Nasri | Ricci-Determinant Gravity: Dynamical Aspects and Astrophysical
Implications | 10 pages, to appear in Physical Review D | Phys. Rev. D 104, 064049 (2021) | 10.1103/PhysRevD.104.064049 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Palatini gravitational action is enlarged by an arbitrary function $f(X)$
of the determinants of the Ricci tensor and the metric,
$X=|\textbf{det}.R|/|\textbf{det}.g|$. The resulting Ricci-determinant theory
exhibits novel deviations from general relativity. We study a particular
realization where the extension i... | [
{
"created": "Mon, 30 Aug 2021 18:11:32 GMT",
"version": "v1"
}
] | 2021-09-21 | [
[
"Azri",
"Hemza",
""
],
[
"Ekşi",
"K. Yavuz",
""
],
[
"Karahan",
"Canan",
""
],
[
"Nasri",
"Salah",
""
]
] | The Palatini gravitational action is enlarged by an arbitrary function $f(X)$ of the determinants of the Ricci tensor and the metric, $X=|\textbf{det}.R|/|\textbf{det}.g|$. The resulting Ricci-determinant theory exhibits novel deviations from general relativity. We study a particular realization where the extension is ... |
2311.12985 | Daniel Flores | Daniel Flores-Alfonso, Cesar S. Lopez-Monsalvo, Marco Maceda | Gravitational Waves from Thurston Geometries | null | Phys. Rev. D 110, 024063 (2024) | 10.1103/PhysRevD.110.024063 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | It has been established that the famous three-dimensional Thurston geometries
have four intrinsically Lorentzian analogs. We explore these spacetimes in
three-dimensional general relativity nonminimally coupled to a scalar field
together with electromagnetic matter. We find that three of these spacetimes
support elec... | [
{
"created": "Tue, 21 Nov 2023 20:43:45 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jul 2024 16:16:29 GMT",
"version": "v2"
}
] | 2024-07-26 | [
[
"Flores-Alfonso",
"Daniel",
""
],
[
"Lopez-Monsalvo",
"Cesar S.",
""
],
[
"Maceda",
"Marco",
""
]
] | It has been established that the famous three-dimensional Thurston geometries have four intrinsically Lorentzian analogs. We explore these spacetimes in three-dimensional general relativity nonminimally coupled to a scalar field together with electromagnetic matter. We find that three of these spacetimes support electr... |
gr-qc/0404007 | Hayoung Lee | Hayoung Lee | The Einstein-Vlasov system with a scalar field | 30 pages | Annales Henri Poincare 6 (2005) 697-723 | 10.1063/1.1891557 | AEI 2004-030 | gr-qc math-ph math.MP | null | We study the Einstein-Vlasov system coupled to a nonlinear scalar field with
a nonnegative potential in locally spatially homogeneous spacetime, as an
expanding cosmological model. It is shown that solutions of this system exist
globally in time. When the potential of the scalar field is of an exponential
form, the c... | [
{
"created": "Thu, 1 Apr 2004 14:27:53 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Lee",
"Hayoung",
""
]
] | We study the Einstein-Vlasov system coupled to a nonlinear scalar field with a nonnegative potential in locally spatially homogeneous spacetime, as an expanding cosmological model. It is shown that solutions of this system exist globally in time. When the potential of the scalar field is of an exponential form, the cos... |
gr-qc/9810005 | Ken D. Olum | J. J. Blanco-Pillado and Ken D. Olum | The form of cosmic string cusps | 14 pages, ReVTex, 2 postscript figures with epsf. v2: correct
exponents in (33cd), additional material in intro | Phys. Rev. D 59, 063508 (1999) | 10.1103/PhysRevD.59.063508 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We classify the possible shapes of cosmic string cusps and how they transform
under Lorentz boosts. A generic cusp can be brought into a form in which the
motion of the cusp tip lies in the plane of the cusp. The cusp whose motion is
perpendicular to this plane, considered by some authors, is a special case and
not t... | [
{
"created": "Thu, 1 Oct 1998 18:39:07 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Jan 2021 16:11:25 GMT",
"version": "v2"
}
] | 2021-01-06 | [
[
"Blanco-Pillado",
"J. J.",
""
],
[
"Olum",
"Ken D.",
""
]
] | We classify the possible shapes of cosmic string cusps and how they transform under Lorentz boosts. A generic cusp can be brought into a form in which the motion of the cusp tip lies in the plane of the cusp. The cusp whose motion is perpendicular to this plane, considered by some authors, is a special case and not the... |
2405.12037 | Bayram Tekin | Emel Altas, Bayram Tekin | Constraints and Time Evolution in Generic $f$(Riemann) Gravity | 29 pages, 1 figure, typos corrected, dedicated to S.Deser | null | null | null | gr-qc astro-ph.CO hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We give a detailed canonical analysis of the $n$-dimensional $f$(Riemann)
gravity, correcting the earlier results in the literature. We also write the
field equations in the Fischer-Marsden form which is amenable to identifying
the non-stationary energy on a spacelike hypersurface. We give pure $R^{2}$
theory as an e... | [
{
"created": "Mon, 20 May 2024 14:05:04 GMT",
"version": "v1"
},
{
"created": "Thu, 13 Jun 2024 09:13:43 GMT",
"version": "v2"
}
] | 2024-06-14 | [
[
"Altas",
"Emel",
""
],
[
"Tekin",
"Bayram",
""
]
] | We give a detailed canonical analysis of the $n$-dimensional $f$(Riemann) gravity, correcting the earlier results in the literature. We also write the field equations in the Fischer-Marsden form which is amenable to identifying the non-stationary energy on a spacelike hypersurface. We give pure $R^{2}$ theory as an exa... |
1111.4332 | Ovidiu Cristinel Stoica | Ovidiu Cristinel Stoica | Analytic Reissner-Nordstrom Singularity | 15 pages, 11 figures | Phys. Scr. 85 (2012) 055004 | 10.1088/0031-8949/85/05/055004 | null | gr-qc math-ph math.DG math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | An analytic extension of the Reissner-Nordstrom solution at and beyond the
singularity is presented. The extension is obtained by using new coordinates in
which the metric becomes degenerate at $r=0$. The metric is still singular in
the new coordinates, but its components become finite and smooth. Using this
extensio... | [
{
"created": "Fri, 18 Nov 2011 11:18:09 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Nov 2011 19:07:33 GMT",
"version": "v2"
},
{
"created": "Thu, 23 Feb 2012 13:57:25 GMT",
"version": "v3"
},
{
"created": "Mon, 27 Feb 2012 18:06:45 GMT",
"version": "v4"
},
{
"c... | 2014-05-13 | [
[
"Stoica",
"Ovidiu Cristinel",
""
]
] | An analytic extension of the Reissner-Nordstrom solution at and beyond the singularity is presented. The extension is obtained by using new coordinates in which the metric becomes degenerate at $r=0$. The metric is still singular in the new coordinates, but its components become finite and smooth. Using this extension ... |
1104.3378 | Ben Whale | Ben E. Whale and Susan M. Scott | A Correspondence Between Distances and Embeddings for Manifolds: New
Techniques for Applications of the Abstract Boundary | 23 pages | Journal of Geometry and Physics, Vol. 61, No. 5. (07 May 2011),
pp. 927-939 | 10.1016/j.geomphys.2010.12.013 | null | gr-qc math.GN | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a one-to-one correspondence between equivalence classes of
embeddings of a manifold (into a larger manifold of the same dimension) and
equivalence classes of certain distances on the manifold. This correspondence
allows us to use the Abstract Boundary to describe the structure of the `edge'
of our manifold... | [
{
"created": "Mon, 18 Apr 2011 03:57:45 GMT",
"version": "v1"
}
] | 2011-04-19 | [
[
"Whale",
"Ben E.",
""
],
[
"Scott",
"Susan M.",
""
]
] | We present a one-to-one correspondence between equivalence classes of embeddings of a manifold (into a larger manifold of the same dimension) and equivalence classes of certain distances on the manifold. This correspondence allows us to use the Abstract Boundary to describe the structure of the `edge' of our manifold w... |
1711.01144 | Mohsen Fathi | Mohsen Fathi | Homothetic Congruences in General Relativity | 19 pages, 15 figures | Mod. Phys. Lett. A 34, 1950001 (2019) | 10.1142/S0217732319500019 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The kinematical characteristics of distinct infalling homothetic fields are
discussed by specifying the transverse subspace of their generated congruences
to the energy-momentum deposit of the chosen gravitational system. This is
pursued through the inclusion of the base manifold's cotangent bundle in a
generalized R... | [
{
"created": "Sun, 29 Oct 2017 08:54:17 GMT",
"version": "v1"
},
{
"created": "Sat, 11 Nov 2017 05:46:15 GMT",
"version": "v2"
},
{
"created": "Sun, 13 May 2018 07:00:55 GMT",
"version": "v3"
},
{
"created": "Thu, 5 Jul 2018 03:10:35 GMT",
"version": "v4"
},
{
"cr... | 2018-11-20 | [
[
"Fathi",
"Mohsen",
""
]
] | The kinematical characteristics of distinct infalling homothetic fields are discussed by specifying the transverse subspace of their generated congruences to the energy-momentum deposit of the chosen gravitational system. This is pursued through the inclusion of the base manifold's cotangent bundle in a generalized Ray... |
2402.09659 | Hayley Macpherson | Hayley J. Macpherson | The impact of anisotropic sky-sampling on the Hubble constant in
numerical relativity | 10 pages, 7 figures, prepared for submission to ApJ, comments welcome | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the impact of nearby inhomogeneities on an observer's inference of
the Hubble constant. Large-scale structures induce a dependence of cosmological
parameters on observer position as well as an anisotropic variance of those
parameters across an observer's sky. While the former has been explored quite
thorough... | [
{
"created": "Thu, 15 Feb 2024 02:00:36 GMT",
"version": "v1"
}
] | 2024-02-16 | [
[
"Macpherson",
"Hayley J.",
""
]
] | We study the impact of nearby inhomogeneities on an observer's inference of the Hubble constant. Large-scale structures induce a dependence of cosmological parameters on observer position as well as an anisotropic variance of those parameters across an observer's sky. While the former has been explored quite thoroughly... |
1710.09257 | Shibesh Kumar Jas Pacif | J. K. Singh, Ritika Nagpal, S. K. J. Pacif | Statefinder diagnostic for modified Chaplygin gas cosmology in f(R,T)
gravity with particle creation | 21 pages, 23 figures. arXiv admin note: text overlap with
arXiv:1603.02573 by other authors | International Journal of Geometric Methods in Modern Physics, Vol.
15, No. 3 (2018) 1850049 (22 pages) | 10.1142/S0219887818500494 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we have studied flat
Friedmann--Lema\^{\i}tre--Robertson--Walker (FLRW) model with modified
Chaplygin gas (MCG) having equation of state $p_{m}=A\rho -% \frac{B}{\rho
^{\gamma }}$, where $0\leq A\leq 1$, $0\leq \gamma \leq 1$ and $B$ is any
positive constant in }${\footnotesize f(R,T)}${\footnotesize \... | [
{
"created": "Mon, 9 Oct 2017 11:10:09 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Oct 2017 13:25:34 GMT",
"version": "v2"
}
] | 2022-07-20 | [
[
"Singh",
"J. K.",
""
],
[
"Nagpal",
"Ritika",
""
],
[
"Pacif",
"S. K. J.",
""
]
] | In this paper, we have studied flat Friedmann--Lema\^{\i}tre--Robertson--Walker (FLRW) model with modified Chaplygin gas (MCG) having equation of state $p_{m}=A\rho -% \frac{B}{\rho ^{\gamma }}$, where $0\leq A\leq 1$, $0\leq \gamma \leq 1$ and $B$ is any positive constant in }${\footnotesize f(R,T)}${\footnotesize \ g... |
1506.04825 | Justin DeAndrea | Justin DeAndrea and Shreya Patel | Total Magnification and Magnification Centroid Due to Strongly Naked
Singularity Lensing | Important citations were updated. 7 pages, 8 figures, and 1 table | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A strongly naked singularity (SNS) was modelled at the center of the Galaxy.
This specific type of naked singularity was characterized in 2008 by Virbhadra
and Keeton. The lens is described using the Janis-Newman-Winicour metric, which
has an ordinary mass and massless scalar charge parameters. Gravitational
lensing ... | [
{
"created": "Tue, 16 Jun 2015 03:21:17 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Jun 2015 02:17:44 GMT",
"version": "v2"
},
{
"created": "Sun, 16 Aug 2015 09:50:05 GMT",
"version": "v3"
}
] | 2015-08-18 | [
[
"DeAndrea",
"Justin",
""
],
[
"Patel",
"Shreya",
""
]
] | A strongly naked singularity (SNS) was modelled at the center of the Galaxy. This specific type of naked singularity was characterized in 2008 by Virbhadra and Keeton. The lens is described using the Janis-Newman-Winicour metric, which has an ordinary mass and massless scalar charge parameters. Gravitational lensing by... |
gr-qc/0311024 | Matteo Luca Ruggiero | Angelo Tartaglia, Matteo Luca Ruggiero | Gravito-electromagnetism versus electromagnetism | 13 Pages, LaTeX, 1 EPS figure, to appear in European Journal of
Physics | Eur.J.Phys. 25 (2004) 203-210 | 10.1088/0143-0807/25/2/007 | null | gr-qc | null | The paper contains a discussion of the properties of the gravito-magnetic
interaction in non stationary conditions. A direct deduction of the equivalent
of Faraday-Henry law is given. A comparison is made between the
gravito-magnetic and the electro-magnetic induction, and it is shown that there
is no Meissner-like e... | [
{
"created": "Fri, 7 Nov 2003 14:34:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Tartaglia",
"Angelo",
""
],
[
"Ruggiero",
"Matteo Luca",
""
]
] | The paper contains a discussion of the properties of the gravito-magnetic interaction in non stationary conditions. A direct deduction of the equivalent of Faraday-Henry law is given. A comparison is made between the gravito-magnetic and the electro-magnetic induction, and it is shown that there is no Meissner-like eff... |
0908.2481 | Jennie D'Ambroise | Jennie D'Ambroise | Applications of Elliptic and Theta Functions to
Friedmann-Robertson-Lemaitre-Walker Cosmology with Cosmological Constant | from lectures of MSRI summer graduate workshop: A Window into Zeta
and Modular Physics, June 16, 2008 to June 27, 2008 | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Elliptic functions are known to appear in many problems, applied and
theoretical. However, a lesser known application is in the study of exact
solutions to Einstein's gravitational field equations in a
Friedmann-Robertson-Lemaitre-Walker (FRLW) cosmology. We will show explicitly
how Jacobi and Weierstrass elliptic fu... | [
{
"created": "Tue, 18 Aug 2009 19:17:49 GMT",
"version": "v1"
}
] | 2009-08-25 | [
[
"D'Ambroise",
"Jennie",
""
]
] | Elliptic functions are known to appear in many problems, applied and theoretical. However, a lesser known application is in the study of exact solutions to Einstein's gravitational field equations in a Friedmann-Robertson-Lemaitre-Walker (FRLW) cosmology. We will show explicitly how Jacobi and Weierstrass elliptic func... |
1402.0089 | Parthapratim Pradhan | Parthapratim Pradhan | Circular Geodesics in the Kerr-Newman-Taub-NUT Space-time | Accepted in Classical Quantum Gravity, 18/06/2015, Some 3D figures
could not be submitted due to arxiv submission problem this could be found in
Journal version | 2015 Class. Quantum Grav. 32 165001 | 10.1088/0264-9381/32/16/165001 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we investigate the equatorial causal (time-like and null)
circular geodesics of the Kerr-Newman-Taub-NUT(Newman-Unti-Tamburino) black
hole in four dimensional Lorentzian geometry. The special characteristics of
this black hole is that it is of \emph{Petrov-Pirani type D} and the photon
trajectories are ... | [
{
"created": "Sat, 1 Feb 2014 14:22:38 GMT",
"version": "v1"
},
{
"created": "Sat, 4 Jul 2015 07:05:18 GMT",
"version": "v2"
}
] | 2015-07-27 | [
[
"Pradhan",
"Parthapratim",
""
]
] | In this paper we investigate the equatorial causal (time-like and null) circular geodesics of the Kerr-Newman-Taub-NUT(Newman-Unti-Tamburino) black hole in four dimensional Lorentzian geometry. The special characteristics of this black hole is that it is of \emph{Petrov-Pirani type D} and the photon trajectories are \e... |
0704.1073 | Stefano Ansoldi | Stefano Ansoldi and Lorenzo Sindoni | Shell-mediated tunnelling between (anti-)de Sitter vacua | LaTeX, 23 pages, 20 figures: in print on Phys. Rev. D; structure of
the paper streamlined, some typos corrected, one reference added, one figure
added with a contourplot of the transition probability; various corrections
also in the figures with the Penrose diagrams of the tunnelling | Phys.Rev.D76:064020,2007 | 10.1103/PhysRevD.76.064020 | MIT-CTP-3732 | gr-qc hep-th | null | We give an extensive study of the tunnelling between arbitrary (anti-)de
Sitter spacetimes separated by an infinitesimally thin relativistic shell in
arbitrary spacetime dimensions. In particular, we find analytically an exact
expression for the tunnelling amplitude.
The detailed spacetime structures that can arise... | [
{
"created": "Mon, 9 Apr 2007 07:58:25 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Apr 2007 12:37:09 GMT",
"version": "v2"
},
{
"created": "Mon, 10 Sep 2007 13:38:56 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Ansoldi",
"Stefano",
""
],
[
"Sindoni",
"Lorenzo",
""
]
] | We give an extensive study of the tunnelling between arbitrary (anti-)de Sitter spacetimes separated by an infinitesimally thin relativistic shell in arbitrary spacetime dimensions. In particular, we find analytically an exact expression for the tunnelling amplitude. The detailed spacetime structures that can arise are... |
gr-qc/0410011 | Steven Detweiler | Luz Maria Diaz-Rivera, Eirini Messaritaki, Bernard F. Whiting, Steven
Detweiler | Scalar field self-force effects on orbits about a Schwarzschild black
hole | 15 pages, 8 figures | Phys.Rev.D70:124018,2004 | 10.1103/PhysRevD.70.124018 | null | gr-qc | null | For a particle of mass mu and scalar charge q, we compute the effects of the
scalar field self-force upon circular orbits, upon slightly eccentric orbits
and upon the innermost stable circular orbit of a Schwarzschild black hole of
mass M. For circular orbits the self force is outward and causes the angular
frequency... | [
{
"created": "Mon, 4 Oct 2004 16:20:41 GMT",
"version": "v1"
}
] | 2010-05-12 | [
[
"Diaz-Rivera",
"Luz Maria",
""
],
[
"Messaritaki",
"Eirini",
""
],
[
"Whiting",
"Bernard F.",
""
],
[
"Detweiler",
"Steven",
""
]
] | For a particle of mass mu and scalar charge q, we compute the effects of the scalar field self-force upon circular orbits, upon slightly eccentric orbits and upon the innermost stable circular orbit of a Schwarzschild black hole of mass M. For circular orbits the self force is outward and causes the angular frequency a... |
gr-qc/0301119 | Alexander Kamenshchik | I.M. Khalatnikov, A.Yu. Kamenshchik, M. Martellini, A.A. Starobinsky | Quasi-isotropic solution of the Einstein equations near a cosmological
singularity for a two-fluid cosmological model | some misprints are corrected and references are added, final version
to appear in JCAP | JCAP 0303 (2003) 001 | 10.1088/1475-7516/2003/03/001 | null | gr-qc astro-ph hep-th | null | The quasi-isotropic inhomogeneous solution of the Einstein equations near a
cosmological singularity in the form of a series expansion in the synchronous
system of reference, first found by Lifshitz and Khalatnikov in 1960, is
generalized to the case of a two-fluid cosmological model. This solution
describes non-decr... | [
{
"created": "Wed, 29 Jan 2003 14:25:41 GMT",
"version": "v1"
},
{
"created": "Sat, 1 Mar 2003 15:18:09 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Khalatnikov",
"I. M.",
""
],
[
"Kamenshchik",
"A. Yu.",
""
],
[
"Martellini",
"M.",
""
],
[
"Starobinsky",
"A. A.",
""
]
] | The quasi-isotropic inhomogeneous solution of the Einstein equations near a cosmological singularity in the form of a series expansion in the synchronous system of reference, first found by Lifshitz and Khalatnikov in 1960, is generalized to the case of a two-fluid cosmological model. This solution describes non-decrea... |
1202.0412 | Sabine Hossenfelder | Sabine Hossenfelder, Leonardo Modesto, Isabeau Pr\'emont-Schwarz | Emission spectra of self-dual black holes | 15 pages, 6 figures, typos corrected, reference added | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the particle spectra of evaporating self-dual black holes that
are potential dark matter candidates. We first estimate the relevant mass and
temperature range and find that the masses are below the Planck mass, and the
temperature of the black holes is small compared to their mass. In this limit,
we then... | [
{
"created": "Thu, 2 Feb 2012 11:31:40 GMT",
"version": "v1"
},
{
"created": "Wed, 15 Feb 2012 07:17:21 GMT",
"version": "v2"
}
] | 2012-02-16 | [
[
"Hossenfelder",
"Sabine",
""
],
[
"Modesto",
"Leonardo",
""
],
[
"Prémont-Schwarz",
"Isabeau",
""
]
] | We calculate the particle spectra of evaporating self-dual black holes that are potential dark matter candidates. We first estimate the relevant mass and temperature range and find that the masses are below the Planck mass, and the temperature of the black holes is small compared to their mass. In this limit, we then d... |
gr-qc/0009075 | Claudio Simeone | Andres Arazi and Claudio Simeone | Wiggly Strings in Linearized Brans-Dicke Gravity | 10 pages, LaTeX, added references | Mod.Phys.Lett. A15 (2000) 1369-1375 | 10.1142/S0217732300001900 | null | gr-qc astro-ph math-ph math.MP | null | The metric around a wiggly cosmic string is calculated in the linear
approximation of Brans-Dicke theory of gravitation. The equations of motion for
relativistic and non-relativistic particles in this metric are obtained.
Light propagation is also studied and it is shown that photon trajectories
can be bounded.
| [
{
"created": "Thu, 21 Sep 2000 17:32:43 GMT",
"version": "v1"
},
{
"created": "Wed, 18 Feb 2004 15:21:47 GMT",
"version": "v2"
},
{
"created": "Thu, 19 Feb 2004 14:40:31 GMT",
"version": "v3"
}
] | 2016-08-31 | [
[
"Arazi",
"Andres",
""
],
[
"Simeone",
"Claudio",
""
]
] | The metric around a wiggly cosmic string is calculated in the linear approximation of Brans-Dicke theory of gravitation. The equations of motion for relativistic and non-relativistic particles in this metric are obtained. Light propagation is also studied and it is shown that photon trajectories can be bounded. |
gr-qc/0605120 | Tomohiro Kai | Tomohiro Kai, Hiroshi Kozaki, Ken-ichi nakao, Yasusada Nambu,
Chul-Moon Yoo | Can inhomogeneties accelerate the cosmic volume expansion? | 12 pages,5 figures. version published in Progress of Theoretical
Physics | Prog.Theor.Phys.117:229-240,2007 | 10.1143/PTP.117.229 | OCU-PHYS-248,AP-GR-34 | gr-qc | null | If expanding and contracting regions coexist in the universe, the speed of
the cosmic volume expansion can be accelerated. We construct simple
inhomogeneous dust-filled universe models in which the speed of the cosmic
volume expansion is accelerated for finite periods. These models are
constructed by removing spheric... | [
{
"created": "Mon, 22 May 2006 09:08:00 GMT",
"version": "v1"
},
{
"created": "Wed, 28 Feb 2007 06:43:36 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Kai",
"Tomohiro",
""
],
[
"Kozaki",
"Hiroshi",
""
],
[
"nakao",
"Ken-ichi",
""
],
[
"Nambu",
"Yasusada",
""
],
[
"Yoo",
"Chul-Moon",
""
]
] | If expanding and contracting regions coexist in the universe, the speed of the cosmic volume expansion can be accelerated. We construct simple inhomogeneous dust-filled universe models in which the speed of the cosmic volume expansion is accelerated for finite periods. These models are constructed by removing spherical... |
gr-qc/0010071 | Raul Vera | Jose M. M. Senovilla and Raul Vera | New family of inhomogeneous $\gamma$-law cosmologies: example of
gravitational waves in a homogeneous $p=\varrho/3$ background | LaTeX, 25 pages, 3 figures. Uses epsfig package. One reference added;
minor changes. To appear in Phys.Rev.D | Phys.Rev. D63 (2001) 084008 | 10.1103/PhysRevD.63.084008 | null | gr-qc | null | We present an explicit three-parameter class of $p=\gamma \varrho$,
($-1/3\leq\gamma<1$), cosmological models admitting a two-dimensional group
$G_{2}$ of isometries acting on spacelike surfaces. The family is self-similar
in the sense that it has a further homothetic vector field and it contains
subfamilies of both ... | [
{
"created": "Thu, 19 Oct 2000 18:09:21 GMT",
"version": "v1"
},
{
"created": "Tue, 5 Dec 2000 15:25:35 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Senovilla",
"Jose M. M.",
""
],
[
"Vera",
"Raul",
""
]
] | We present an explicit three-parameter class of $p=\gamma \varrho$, ($-1/3\leq\gamma<1$), cosmological models admitting a two-dimensional group $G_{2}$ of isometries acting on spacelike surfaces. The family is self-similar in the sense that it has a further homothetic vector field and it contains subfamilies of both (p... |
1712.10076 | Pramod Pandya | Pramod Pandya | Gravitationally coupled Quantum Harmonic Oscillator | null | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a quantum harmonic oscillator model of a collapsed star trapped in
the potential well of its gravitational field. The model incorporates quantum
matter (quantum fields) as a source to classical gravitational field. We
describe the gravitationally collapsed star as a quantum harmonic oscillator in
an analog... | [
{
"created": "Thu, 28 Dec 2017 22:48:30 GMT",
"version": "v1"
}
] | 2018-01-01 | [
[
"Pandya",
"Pramod",
""
]
] | We present a quantum harmonic oscillator model of a collapsed star trapped in the potential well of its gravitational field. The model incorporates quantum matter (quantum fields) as a source to classical gravitational field. We describe the gravitationally collapsed star as a quantum harmonic oscillator in an analogy ... |
1404.1819 | Andrea Taracchini | Andrea Taracchini, Alessandra Buonanno, Gaurav Khanna, Scott A. Hughes | Small mass plunging into a Kerr black hole: Anatomy of the
inspiral-merger-ringdown waveforms | 20 pages, 15 figures | Phys. Rev. D 90, 084025 (2014) | 10.1103/PhysRevD.90.084025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We numerically solve the Teukolsky equation in the time domain to obtain the
gravitational-wave emission of a small mass inspiraling and plunging into the
equatorial plane of a Kerr black hole. We account for the dissipation of
orbital energy using the Teukolsky frequency-domain gravitational-wave fluxes
for circular... | [
{
"created": "Mon, 7 Apr 2014 15:49:31 GMT",
"version": "v1"
}
] | 2014-10-22 | [
[
"Taracchini",
"Andrea",
""
],
[
"Buonanno",
"Alessandra",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Hughes",
"Scott A.",
""
]
] | We numerically solve the Teukolsky equation in the time domain to obtain the gravitational-wave emission of a small mass inspiraling and plunging into the equatorial plane of a Kerr black hole. We account for the dissipation of orbital energy using the Teukolsky frequency-domain gravitational-wave fluxes for circular, ... |
gr-qc/9711067 | Jai-chan Hwang | J. Hwang | The Origin of Structures in Generalized Gravity | 5 pages, latex, no figure | Gen.Rel.Grav. 30 (1998) 545-553 | 10.1023/A:1018861906676 | null | gr-qc | null | In a class of generalized gravity theories with general couplings between the
scalar field and the scalar curvature in the Lagrangian, we can describe the
quantum generation and the classical evolution of both the scalar and tensor
structures in a simple and unified manner. An accelerated expansion phase based
on the... | [
{
"created": "Fri, 21 Nov 1997 05:38:15 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Hwang",
"J.",
""
]
] | In a class of generalized gravity theories with general couplings between the scalar field and the scalar curvature in the Lagrangian, we can describe the quantum generation and the classical evolution of both the scalar and tensor structures in a simple and unified manner. An accelerated expansion phase based on the g... |
1010.5375 | Ying-li Zhang | Shin'ichi Nojiri, Sergei D. Odintsov, Misao Sasaki and Ying-li Zhang | Screening of cosmological constant in non-local gravity | LaTeX 7 pages, no figure | Phys.Lett.B696:278-282,2011 | 10.1016/j.physletb.2010.12.035 | YITP-10-91 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss a possible mechanism to screen a cosmological constant in
non-local gravity. We find that in a simple model of of non-local gravity with
the Lagrangian of the form, $R+f(\Box^{-1}R)-2\Lambda$ where $f(X)$ is a
quadratic function of $X$, there is a flat spacetime solution despite the
presence of the cosmolo... | [
{
"created": "Tue, 26 Oct 2010 12:19:00 GMT",
"version": "v1"
}
] | 2011-01-27 | [
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Sasaki",
"Misao",
""
],
[
"Zhang",
"Ying-li",
""
]
] | We discuss a possible mechanism to screen a cosmological constant in non-local gravity. We find that in a simple model of of non-local gravity with the Lagrangian of the form, $R+f(\Box^{-1}R)-2\Lambda$ where $f(X)$ is a quadratic function of $X$, there is a flat spacetime solution despite the presence of the cosmologi... |
1706.01768 | Yuan K. Ha | Yuan K. Ha | Weighing The Black Holes Of GW150914 | Honorable Mention Award - Gravity Research Foundation 2017. (8
pages). Numerical values and Eq.(7), Eq.(11) typos corrected | Int. J. Mod. Phys. D, Vol. 26, No. 12 (2017) 1743018 | 10.1142/S0218271817430180 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We evaluate the mass of the black holes of GW150914 at their event horizons
via quasi-local energy approach and obtain the values of 71 and 57 solar
masses, compared to their asymptotic values of 36 and 29 units, respectively,
as reported by LIGO. A higher mass at the event horizon is compulsory in order
to overcome ... | [
{
"created": "Fri, 2 Jun 2017 04:01:46 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Jul 2017 02:01:23 GMT",
"version": "v2"
}
] | 2017-11-09 | [
[
"Ha",
"Yuan K.",
""
]
] | We evaluate the mass of the black holes of GW150914 at their event horizons via quasi-local energy approach and obtain the values of 71 and 57 solar masses, compared to their asymptotic values of 36 and 29 units, respectively, as reported by LIGO. A higher mass at the event horizon is compulsory in order to overcome th... |
2205.08876 | Tanmoy Paul | Shin'ichi Nojiri, Sergei D. Odintsov, Tanmoy Paul | Early and late universe holographic cosmology from a new generalized
entropy | PLB Accepted | null | 10.1016/j.physletb.2022.137189 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We propose a new four-parameter entropy function that generalizes the
Tsallis, R\'{e}nyi, Barrow, Sharma-Mittal, Kaniadakis and Loop Quantum Gravity
entropies for suitable limits of the parameters. Consequently, we address the
early and late universe cosmology corresponding to the proposed four-parameter
entropy func... | [
{
"created": "Wed, 18 May 2022 12:01:00 GMT",
"version": "v1"
}
] | 2022-06-15 | [
[
"Nojiri",
"Shin'ichi",
""
],
[
"Odintsov",
"Sergei D.",
""
],
[
"Paul",
"Tanmoy",
""
]
] | We propose a new four-parameter entropy function that generalizes the Tsallis, R\'{e}nyi, Barrow, Sharma-Mittal, Kaniadakis and Loop Quantum Gravity entropies for suitable limits of the parameters. Consequently, we address the early and late universe cosmology corresponding to the proposed four-parameter entropy functi... |
1910.03243 | Octavian Micu | Roberto Casadio, Octavian Micu and Jonas Mureika | On the mass of bootstrapped Newtonian sources | 11 pages, 7 figures | null | 10.1142/S0217732320501722 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that the bootstrapped Newtonian potential generated by a uniform and
isotropic source does not depend on the one-loop correction for the matter
coupling to gravity. The latter however affects the relation between the proper
mass and the ADM mass and, consequently, the pressure needed to keep the
configuration... | [
{
"created": "Tue, 8 Oct 2019 07:05:28 GMT",
"version": "v1"
},
{
"created": "Fri, 17 Apr 2020 07:16:53 GMT",
"version": "v2"
}
] | 2020-04-20 | [
[
"Casadio",
"Roberto",
""
],
[
"Micu",
"Octavian",
""
],
[
"Mureika",
"Jonas",
""
]
] | We show that the bootstrapped Newtonian potential generated by a uniform and isotropic source does not depend on the one-loop correction for the matter coupling to gravity. The latter however affects the relation between the proper mass and the ADM mass and, consequently, the pressure needed to keep the configuration s... |
1409.1884 | Ayan Banerjee | Ayan Banerjee, Farook Rahaman and Tanuka Chattopadhyay | Charged star in (2+1)-dimensional gravity | 10 pages, 10 figures | null | 10.1007/s10509-015-2267-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We obtain a new class of exact solutions for the Einstein-Maxwell system in
static spherically symmetric charged star in (2+1)-dimensional gravity. In
order to obtain the analytical solutions we treat the matter distribution
anisotropic in nature admitting linear or nonlinear equation of state and the
electric field ... | [
{
"created": "Sat, 26 Jul 2014 19:53:14 GMT",
"version": "v1"
}
] | 2015-06-22 | [
[
"Banerjee",
"Ayan",
""
],
[
"Rahaman",
"Farook",
""
],
[
"Chattopadhyay",
"Tanuka",
""
]
] | We obtain a new class of exact solutions for the Einstein-Maxwell system in static spherically symmetric charged star in (2+1)-dimensional gravity. In order to obtain the analytical solutions we treat the matter distribution anisotropic in nature admitting linear or nonlinear equation of state and the electric field in... |
1804.09616 | Muhammad Sharif | M. Sharif and Sobia Sadiq | Gravitational Decoupled Charged Anisotropic Spherical Solutions | 20 pages, 6 figures | Eur. Phys. J. C 78(2018)410 | 10.1140/epjc/s10052-018-5894-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of this paper is to obtain exact solutions for charged
anisotropic spherically symmetric matter configuration. For this purpose, we
consider known solution for isotropic spherical system in the presence of
electromagnetic field and extend it to two types of anisotropic charged
solutions through gravitatio... | [
{
"created": "Mon, 23 Apr 2018 06:39:12 GMT",
"version": "v1"
}
] | 2018-07-04 | [
[
"Sharif",
"M.",
""
],
[
"Sadiq",
"Sobia",
""
]
] | The purpose of this paper is to obtain exact solutions for charged anisotropic spherically symmetric matter configuration. For this purpose, we consider known solution for isotropic spherical system in the presence of electromagnetic field and extend it to two types of anisotropic charged solutions through gravitationa... |
gr-qc/9308019 | null | Victor M. Villalba | Particle Creation in a universe filled by radiation and dust-like matter | 16pp. IVIC-CFLE-93/03 | Prog.Theor.Phys. 90 (1993) 851-860 | 10.1143/ptp/90.4.851 | null | gr-qc | null | In this article the particle creation process of scalar and spin 1/2
particles in a spatially open cosmological model associated with a universe
filled by radiation and dustlike matter. The Klein-Gordon and Dirac equations
are solved via separation of variables. After comparing the{\it \ in }and% {\it
\ out} vacua, w... | [
{
"created": "Thu, 19 Aug 1993 21:51:11 GMT",
"version": "v1"
}
] | 2017-02-01 | [
[
"Villalba",
"Victor M.",
""
]
] | In this article the particle creation process of scalar and spin 1/2 particles in a spatially open cosmological model associated with a universe filled by radiation and dustlike matter. The Klein-Gordon and Dirac equations are solved via separation of variables. After comparing the{\it \ in }and% {\it \ out} vacua, we ... |
1510.06236 | Edward Malec | Patryk Mach, Edward Malec, Michal Pirog | General-relativistic rotation laws in rotating fluid bodies, new
weak-field effects and the post-newtonian expansion | A talk presented by Edward Malec at MG14 conference in Rome | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent general-relativistic extensions of Newtonian rotation laws for
self-gravitating stationary fluids allow one to rederive, in the first
post-Newtonian approximation, the well known geometric dragging of frames, and
two new weak-field effects within rotating tori. These are the recently
discovered anti-dragging a... | [
{
"created": "Wed, 21 Oct 2015 12:49:51 GMT",
"version": "v1"
}
] | 2015-10-22 | [
[
"Mach",
"Patryk",
""
],
[
"Malec",
"Edward",
""
],
[
"Pirog",
"Michal",
""
]
] | Recent general-relativistic extensions of Newtonian rotation laws for self-gravitating stationary fluids allow one to rederive, in the first post-Newtonian approximation, the well known geometric dragging of frames, and two new weak-field effects within rotating tori. These are the recently discovered anti-dragging and... |
gr-qc/0112064 | Sanjay M. Wagh | Sanjay M. Wagh and Keshlan S. Govinder | Naked Singularities in Spherically Symmetric, Self-Similar Spacetimes | RevTex4b3, 3 Pages, No Figures | null | null | null | gr-qc astro-ph | null | We show that all known naked singularities in spherically symmetric
self-similar spacetimes arise as a result of singular initial matter
distribution. This is a result of the peculiarity of the coordinate
transformation that takes these spacetimes into a separable form. Therefore,
these examples of naked singularitie... | [
{
"created": "Mon, 24 Dec 2001 05:15:41 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Wagh",
"Sanjay M.",
""
],
[
"Govinder",
"Keshlan S.",
""
]
] | We show that all known naked singularities in spherically symmetric self-similar spacetimes arise as a result of singular initial matter distribution. This is a result of the peculiarity of the coordinate transformation that takes these spacetimes into a separable form. Therefore, these examples of naked singularities ... |
1210.1920 | Akbar Jahan | A. Jahan, N. Sadeghnezhad | Gravitational Radiation in Noncommutative Gravity | 6 pages, no figure | Rom. J. Phys 58 (2013) 866 | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational radiation power of a binary system in a noncommutative
space is derived and it's rate of the period decrease is calculated to first
order in noncommutativity parameter. By comparing the theoretical results with
the observational data of the binary pulsar PSR 1913+16, we find a bound on the
noncommut... | [
{
"created": "Sat, 6 Oct 2012 07:09:49 GMT",
"version": "v1"
},
{
"created": "Mon, 11 Feb 2013 05:42:35 GMT",
"version": "v2"
},
{
"created": "Mon, 24 Nov 2014 10:39:30 GMT",
"version": "v3"
}
] | 2014-11-25 | [
[
"Jahan",
"A.",
""
],
[
"Sadeghnezhad",
"N.",
""
]
] | The gravitational radiation power of a binary system in a noncommutative space is derived and it's rate of the period decrease is calculated to first order in noncommutativity parameter. By comparing the theoretical results with the observational data of the binary pulsar PSR 1913+16, we find a bound on the noncommutat... |
0905.1735 | Puxun Wu | Xiangyun Fu, Puxun Wu and Hongwei Yu | The growth of linear perturbations in the DGP model | 12 pages, 4 figuers, to appear in PLB | Phys.Lett.B677:12-15,2009 | 10.1016/j.physletb.2009.05.007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the linear growth of matter perturbations in the DGP model with the
growth index $\gamma$ as a function of redshift. At the linear approximation:
$\gamma(z)\approx\gamma_0+\gamma_0^\prime z $, we find that, for
$0.2\leq\Omega_{m,0}\leq0.35$, $\gamma_0$ takes the value from 0.658 to 0.671,
and $\gamma_0^\prim... | [
{
"created": "Mon, 11 May 2009 23:27:59 GMT",
"version": "v1"
},
{
"created": "Thu, 28 May 2009 09:01:32 GMT",
"version": "v2"
}
] | 2010-05-28 | [
[
"Fu",
"Xiangyun",
""
],
[
"Wu",
"Puxun",
""
],
[
"Yu",
"Hongwei",
""
]
] | We study the linear growth of matter perturbations in the DGP model with the growth index $\gamma$ as a function of redshift. At the linear approximation: $\gamma(z)\approx\gamma_0+\gamma_0^\prime z $, we find that, for $0.2\leq\Omega_{m,0}\leq0.35$, $\gamma_0$ takes the value from 0.658 to 0.671, and $\gamma_0^\prime$... |
2302.04043 | Remo Garattini | Remo Garattini | Effects of an Electric Charge on Casimir Wormholes: Changing the Throat
Size | LaTeX 15 pages | null | 10.1140/epjc/s10052-023-11464-4 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this paper we continue the investigation about the connection between
Casimir energy and the traversability of a wormhole. In addition to the
negative energy density obtained by a Casimir device, we include the effect of
an electromagnetic field generated by an electric charge. This combination
defines an electrov... | [
{
"created": "Wed, 8 Feb 2023 13:34:06 GMT",
"version": "v1"
}
] | 2023-05-24 | [
[
"Garattini",
"Remo",
""
]
] | In this paper we continue the investigation about the connection between Casimir energy and the traversability of a wormhole. In addition to the negative energy density obtained by a Casimir device, we include the effect of an electromagnetic field generated by an electric charge. This combination defines an electrovac... |
0809.3867 | Lau Loi So | Lau Loi So | Gravitational energy in a small region for the modified Einstein and
Landau-Lifshitz pseudotensors | 7 | Class.Quant.Grav.26:185004,2009 | 10.1088/0264-9381/26/18/185004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The purpose of the classical Einstein and Landau-Lifshitz pseudotensors is
for determining the gravitational energy. Neither of them can guarantee a
positive energy in holonomic frames. In the small sphere approximation, it has
been required that the quasilocal expression for the gravitational
energy-momentum density... | [
{
"created": "Tue, 23 Sep 2008 08:59:28 GMT",
"version": "v1"
}
] | 2009-09-28 | [
[
"So",
"Lau Loi",
""
]
] | The purpose of the classical Einstein and Landau-Lifshitz pseudotensors is for determining the gravitational energy. Neither of them can guarantee a positive energy in holonomic frames. In the small sphere approximation, it has been required that the quasilocal expression for the gravitational energy-momentum density s... |
gr-qc/0507059 | Christopher Eling | Christopher Eling | Energy in the Einstein-Aether Theory | 10 pages; v2: revised manuscript, final version, to appear in PRD;
v3: corrected error in the equation for the aether stress tensor, results
unchanged since correct form was used in calculations | Phys.Rev.D73:084026,2006; Erratum-ibid.D80:129905,2009 | 10.1103/PhysRevD.73.084026 10.1103/PhysRevD.80.129905 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the energy of a theory with a unit vector field (the "aether")
coupled to gravity. Both the Weinberg and Einstein type energy-momentum
pseudotensors are employed. In the linearized theory we find expressions for
the energy density of the 5 wave modes. The requirement that the modes have
positive energy... | [
{
"created": "Thu, 14 Jul 2005 02:53:29 GMT",
"version": "v1"
},
{
"created": "Fri, 21 Apr 2006 02:21:30 GMT",
"version": "v2"
},
{
"created": "Sun, 6 Dec 2009 14:35:49 GMT",
"version": "v3"
}
] | 2014-11-17 | [
[
"Eling",
"Christopher",
""
]
] | We investigate the energy of a theory with a unit vector field (the "aether") coupled to gravity. Both the Weinberg and Einstein type energy-momentum pseudotensors are employed. In the linearized theory we find expressions for the energy density of the 5 wave modes. The requirement that the modes have positive energy i... |
2406.09543 | Rajendra Prasad Bhatt | Rajendra Prasad Bhatt, Sumanta Chakraborty, Sukanta Bose | Rotating black holes experience dynamical tides | 24 pages, 1 figure | null | null | LIGO-P240025 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the tidal response of a rotating black hole from the Teukolsky
equation in the near-horizon and small-frequency regime. While the static tidal
Love number of an arbitrarily rotating black hole is still zero, the dynamical
tidal Love number is not; rather, it is proportional to the angular velocity of
the... | [
{
"created": "Thu, 13 Jun 2024 18:55:20 GMT",
"version": "v1"
}
] | 2024-06-17 | [
[
"Bhatt",
"Rajendra Prasad",
""
],
[
"Chakraborty",
"Sumanta",
""
],
[
"Bose",
"Sukanta",
""
]
] | We calculate the tidal response of a rotating black hole from the Teukolsky equation in the near-horizon and small-frequency regime. While the static tidal Love number of an arbitrarily rotating black hole is still zero, the dynamical tidal Love number is not; rather, it is proportional to the angular velocity of the b... |
1408.0152 | Rituparno Goswami | Anne Marie Nzioki, Rituparno Goswami and Peter K. S. Dunsby | Vibrating Black Holes in f(R) gravity | 29 pages, 6 figures, Revtex4. Minor changes in the text, references
added | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider general perturbations of a Schwarzschild black holes in the
context of f(R) gravity. A reduced set of frame independent master variables
are determined, which obey two closed wave equations - one for the transverse,
trace-free (tensor) perturbations and the other for the additional scalar
degree of freedo... | [
{
"created": "Fri, 1 Aug 2014 12:29:49 GMT",
"version": "v1"
},
{
"created": "Mon, 18 Aug 2014 08:16:44 GMT",
"version": "v2"
}
] | 2014-08-19 | [
[
"Nzioki",
"Anne Marie",
""
],
[
"Goswami",
"Rituparno",
""
],
[
"Dunsby",
"Peter K. S.",
""
]
] | We consider general perturbations of a Schwarzschild black holes in the context of f(R) gravity. A reduced set of frame independent master variables are determined, which obey two closed wave equations - one for the transverse, trace-free (tensor) perturbations and the other for the additional scalar degree of freedom ... |
0712.1421 | Eduardo J.S. Villase\~nor | Daniel G\'omez Vergel, Eduardo J. S. Villase\~nor | Unitary evolution of free massless fields in de Sitter space-time | 20 pages. Comments and references added | Class.Quant.Grav.25:145008,2008 | 10.1088/0264-9381/25/14/145008 | null | gr-qc | null | We consider the quantum dynamics of a massless scalar field in de Sitter
space-time. The classical evolution is represented by a canonical
transformation on the phase space for the field theory. By studying the
corresponding Bogoliubov transformations, we show that the symplectic map that
encodes the evolution betwee... | [
{
"created": "Mon, 10 Dec 2007 10:22:00 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Feb 2008 20:52:10 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Vergel",
"Daniel Gómez",
""
],
[
"Villaseñor",
"Eduardo J. S.",
""
]
] | We consider the quantum dynamics of a massless scalar field in de Sitter space-time. The classical evolution is represented by a canonical transformation on the phase space for the field theory. By studying the corresponding Bogoliubov transformations, we show that the symplectic map that encodes the evolution between ... |
gr-qc/0307051 | Ulrich H. Gerlach | Ulrich H. Gerlach | Radiation from Bodies with Extreme Acceleration II: Kinematics | This 21-page 13-figure RevTeX4 article is a follow-up to Part I:
"Radiation from violently accelerated bodies", gr-qc/0110048 | Found.Phys. 33 (2003) 179-221 | 10.1023/A:1023712604772 | null | gr-qc | null | When applied to a dipole source subjected to acceleration which is violent
and long lasting (``extreme acceleration''), Maxwell's equations predict
radiative power which augments Larmor's classical radiation formula by a
nontrivial amount. The physical assumptions behind this result are made
possible by the kinematic... | [
{
"created": "Thu, 10 Jul 2003 15:42:30 GMT",
"version": "v1"
}
] | 2022-10-12 | [
[
"Gerlach",
"Ulrich H.",
""
]
] | When applied to a dipole source subjected to acceleration which is violent and long lasting (``extreme acceleration''), Maxwell's equations predict radiative power which augments Larmor's classical radiation formula by a nontrivial amount. The physical assumptions behind this result are made possible by the kinematics ... |
1705.10477 | Naoki Tsukamoto | Naoki Tsukamoto, Kota Ogasawara, Yungui Gong | Particle collision with an arbitrarily high center-of-mass energy near a
Ba\~nados-Teitelboim-Zanelli black hole | 17 pages, 2 figures, minor correction, accepted for publication in
Physical Review D | Phys. Rev. D 96, 024042 (2017) | 10.1103/PhysRevD.96.024042 | RUP-17-10 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a particle collision with a high center-of-mass energy near a
Ba\~nados-Teitelboim-Zanelli (BTZ) black hole. We obtain the center-of-mass
energy of two general colliding geodesic particles in the BTZ black hole
spacetime. We show that the center-of-mass energy of two ingoing particles can
be arbitrarily l... | [
{
"created": "Tue, 30 May 2017 07:10:23 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Jul 2017 05:09:27 GMT",
"version": "v2"
}
] | 2017-07-27 | [
[
"Tsukamoto",
"Naoki",
""
],
[
"Ogasawara",
"Kota",
""
],
[
"Gong",
"Yungui",
""
]
] | We consider a particle collision with a high center-of-mass energy near a Ba\~nados-Teitelboim-Zanelli (BTZ) black hole. We obtain the center-of-mass energy of two general colliding geodesic particles in the BTZ black hole spacetime. We show that the center-of-mass energy of two ingoing particles can be arbitrarily lar... |
2105.05035 | Ali \"Ovg\"un Dr. | A. \"Ovg\"un | Black hole with confining electric potential in scalar-tensor
description of regularized 4-dimensional Einstein-Gauss-Bonnet gravity | 11 pages. Typos in latex corrected. Accepted for publication in
Physics Letters B | Physics Letters B 820, 136517 (2021) | 10.1016/j.physletb.2021.136517 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | In this paper, we analytically present an exact confining charged black hole
solution to the scalar-tensor description of regularized 4-dimensional
Einstein-Gauss-Bonnet gravity (4DEGBG) coupled to non-linear gauge theory
containing $\sqrt{-F^{2}}$ term. Part of the importance of using a non-trivial
$4D$ theory of Ga... | [
{
"created": "Mon, 10 May 2021 08:55:42 GMT",
"version": "v1"
},
{
"created": "Wed, 19 May 2021 08:30:56 GMT",
"version": "v2"
},
{
"created": "Thu, 15 Jul 2021 11:20:41 GMT",
"version": "v3"
},
{
"created": "Mon, 19 Jul 2021 13:17:20 GMT",
"version": "v4"
}
] | 2022-04-28 | [
[
"Övgün",
"A.",
""
]
] | In this paper, we analytically present an exact confining charged black hole solution to the scalar-tensor description of regularized 4-dimensional Einstein-Gauss-Bonnet gravity (4DEGBG) coupled to non-linear gauge theory containing $\sqrt{-F^{2}}$ term. Part of the importance of using a non-trivial $4D$ theory of Gaus... |
1812.06320 | Michael T. Anderson | Michael T. Anderson | On the conformal method for the Einstein constraint equations | Final version, 31 pages, To appear in ATMP | null | null | null | gr-qc math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we use the global analysis and degree-theoretic methods
introduced by Smale to study the existence and multiplicity of solutions of the
vacuum Einstein constraint equations given by the conformal method of
Lichnerowicz-Choquet-Bruhat-York. In particular this approach gives a new proof
of the existence r... | [
{
"created": "Sat, 15 Dec 2018 16:55:28 GMT",
"version": "v1"
},
{
"created": "Fri, 28 Dec 2018 17:22:59 GMT",
"version": "v2"
},
{
"created": "Thu, 4 Apr 2019 20:48:30 GMT",
"version": "v3"
},
{
"created": "Tue, 28 Jul 2020 17:28:06 GMT",
"version": "v4"
}
] | 2020-07-29 | [
[
"Anderson",
"Michael T.",
""
]
] | In this work, we use the global analysis and degree-theoretic methods introduced by Smale to study the existence and multiplicity of solutions of the vacuum Einstein constraint equations given by the conformal method of Lichnerowicz-Choquet-Bruhat-York. In particular this approach gives a new proof of the existence res... |
gr-qc/9209009 | Dieter Brill | Dieter Brill | Euclidean Maxwell-Einstein Theory | 8 pages, to appear in L. Witten Festschrift | null | null | UMD 93-038 | gr-qc | null | After reviewing the context in which Euclidean propagation is useful we
compare and contrast Euclidean and Lorentzian Maxwell-Einstein theory and give
some examples of Euclidean solutions.
| [
{
"created": "Thu, 24 Sep 1992 13:32:14 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Brill",
"Dieter",
""
]
] | After reviewing the context in which Euclidean propagation is useful we compare and contrast Euclidean and Lorentzian Maxwell-Einstein theory and give some examples of Euclidean solutions. |
1910.05666 | Zhoujian Cao Dr | Bing Sun and Zhoujian Cao and Lijing Shao | Constraint on the fifth force through perihelion precession of planets | 7 pages, 2 figures | Phys.Rev. D 100 (2019) 084030 | 10.1103/PhysRevD.100.084030 | null | gr-qc astro-ph.EP hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The equivalence principle is important in fundamental physics. The fifth
force, as a describing formalism of the equivalence principle, may indicate the
property of an unknown theory. Dark matter is one of the most mysterious
objects in the current natural science. It is interesting to constrain the
fifth force of da... | [
{
"created": "Sun, 13 Oct 2019 01:53:23 GMT",
"version": "v1"
}
] | 2019-11-12 | [
[
"Sun",
"Bing",
""
],
[
"Cao",
"Zhoujian",
""
],
[
"Shao",
"Lijing",
""
]
] | The equivalence principle is important in fundamental physics. The fifth force, as a describing formalism of the equivalence principle, may indicate the property of an unknown theory. Dark matter is one of the most mysterious objects in the current natural science. It is interesting to constrain the fifth force of dark... |
gr-qc/0002075 | Claus Laemmerzahl | M. Haugan and C. Laemmerzahl | On the experimental foundations of the Maxwell equations | 6 pages, Latex. To appear in Ann. Physik (Leipzig) | null | null | null | gr-qc | null | We begin by reviewing the derivation of generalized Maxwell equations from an
operational definition of the electromagnetic field and the most basic notions
of what constitutes a dynamical field theory. These equations encompass the
familiar Maxwell equations as a special case but, in other cases, can predict
birefri... | [
{
"created": "Tue, 22 Feb 2000 15:44:55 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Haugan",
"M.",
""
],
[
"Laemmerzahl",
"C.",
""
]
] | We begin by reviewing the derivation of generalized Maxwell equations from an operational definition of the electromagnetic field and the most basic notions of what constitutes a dynamical field theory. These equations encompass the familiar Maxwell equations as a special case but, in other cases, can predict birefring... |
gr-qc/0511088 | Giulio Ruffini | G. Ruffini | Quantization of simple parametrized systems | 1995 UC Davis/LANL PhD thesis | null | null | null | gr-qc | null | I study the canonical formulation and quantization of some simple
parametrized systems, including the non-relativistic parametrized particle and
the relativistic parametrized particle. Using Dirac's formalism I construct for
each case the classical reduced phase space and study the dependence on the
gauge fixing used... | [
{
"created": "Wed, 16 Nov 2005 14:36:14 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Ruffini",
"G.",
""
]
] | I study the canonical formulation and quantization of some simple parametrized systems, including the non-relativistic parametrized particle and the relativistic parametrized particle. Using Dirac's formalism I construct for each case the classical reduced phase space and study the dependence on the gauge fixing used. ... |
2104.13563 | Jialin Zhang | Yao Xiao, Jialin Zhang, Hongwei Yu | Thermodynamical multihair and phase transitions of 4-dimensional charged
Taub-NUT-AdS spacetimes | 18 pages,9 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the behavior of phase transitions for the four-dimensional charged
Taub-NUT-AdS spacetime with the Newman-Unti-Tamburino (NUT) parameter
interpreted as the thermodynamic multihair in the extended thermodynamic phase
space, and mainly focus on the effects of the NUT parameter on the phase
transitions. We find... | [
{
"created": "Wed, 28 Apr 2021 03:54:14 GMT",
"version": "v1"
}
] | 2021-04-29 | [
[
"Xiao",
"Yao",
""
],
[
"Zhang",
"Jialin",
""
],
[
"Yu",
"Hongwei",
""
]
] | We study the behavior of phase transitions for the four-dimensional charged Taub-NUT-AdS spacetime with the Newman-Unti-Tamburino (NUT) parameter interpreted as the thermodynamic multihair in the extended thermodynamic phase space, and mainly focus on the effects of the NUT parameter on the phase transitions. We find t... |
1709.09263 | Luca Buoninfante | Luca Buoninfante, Gaetano Lambiase, Anupam Mazumdar | Quantum spreading of a self-gravitating wave-packet in singularity free
gravity | 9 pages, 2 figures. Version accepted for publication in EPJC | null | 10.1140/epjc/s10052-018-5535-4 | null | gr-qc quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we will study for the first time how the wave-packet of a
self-gravitating meso-scopic system spreads in theories beyond Einstein's
general relativity. In particular, we will consider a ghost-free infinite
derivative gravity, which resolves the $1/r$ singularity in the potential -
such that the gradient... | [
{
"created": "Tue, 26 Sep 2017 21:20:12 GMT",
"version": "v1"
},
{
"created": "Thu, 25 Jan 2018 13:45:43 GMT",
"version": "v2"
}
] | 2018-03-14 | [
[
"Buoninfante",
"Luca",
""
],
[
"Lambiase",
"Gaetano",
""
],
[
"Mazumdar",
"Anupam",
""
]
] | In this paper we will study for the first time how the wave-packet of a self-gravitating meso-scopic system spreads in theories beyond Einstein's general relativity. In particular, we will consider a ghost-free infinite derivative gravity, which resolves the $1/r$ singularity in the potential - such that the gradient o... |
2109.06904 | Genly Le\'on | Andronikos Paliathanasis (DUT, Durban and Chile Austral U., Valdivia),
Genly Leon (Catolica del Norte U.) | Global dynamics and evolution for the Szekeres system with nonzero
cosmological constant term | 45 pages, 20 compound figures, 1 table | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Szekeres system with cosmological constant term describes the evolution
of the kinematic quantities for Einstein field equations in $\mathbb{R}^4$. In
this study, we investigate the behavior of trajectories in the presence of
cosmological constant. It has been shown that the Szekeres system is a
Hamiltonian dynam... | [
{
"created": "Tue, 14 Sep 2021 18:04:45 GMT",
"version": "v1"
}
] | 2021-09-16 | [
[
"Paliathanasis",
"Andronikos",
"",
"DUT, Durban and Chile Austral U., Valdivia"
],
[
"Leon",
"Genly",
"",
"Catolica del Norte U."
]
] | The Szekeres system with cosmological constant term describes the evolution of the kinematic quantities for Einstein field equations in $\mathbb{R}^4$. In this study, we investigate the behavior of trajectories in the presence of cosmological constant. It has been shown that the Szekeres system is a Hamiltonian dynamic... |
2408.00259 | Tayyab Naseer | Tayyab Naseer, M. Sharif | Decoupled Anisotropic Buchdahl's Relativistic Models in
$f(\mathbb{R},\mathbb{T})$ Theory | 34 pages, 16 figures | Phys. Scr. 99(2024)035001 | 10.1088/1402-4896/ad1c28 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper constructs three different anisotropic extensions of the existing
isotropic solution to the modified field equations through the gravitational
decoupling in $f(\mathbb{R},\mathbb{T})$ theory. For this, we take a static
sphere that is initially filled with the isotropic fluid and then add a new
gravitationa... | [
{
"created": "Thu, 1 Aug 2024 03:33:13 GMT",
"version": "v1"
}
] | 2024-08-02 | [
[
"Naseer",
"Tayyab",
""
],
[
"Sharif",
"M.",
""
]
] | This paper constructs three different anisotropic extensions of the existing isotropic solution to the modified field equations through the gravitational decoupling in $f(\mathbb{R},\mathbb{T})$ theory. For this, we take a static sphere that is initially filled with the isotropic fluid and then add a new gravitational ... |
1207.5131 | Mattias Dahl | Mattias Dahl, Romain Gicquaud, Emmanuel Humbert | A non-existence result for a generalization of the equations of the
conformal method in general relativity | minor changes from previous version | Class. Quantum Grav. 30 (2013) 075004 | 10.1088/0264-9381/30/7/075004 | null | gr-qc math.AP math.DG | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The constraint equations of general relativity can in many cases be solved by
the conformal method. We show that a slight modification of the equations of
the conformal method admits no solution for a broad range of parameters. This
suggests that the question of existence or non-existence of solutions to the
original... | [
{
"created": "Sat, 21 Jul 2012 12:27:58 GMT",
"version": "v1"
},
{
"created": "Sat, 15 Sep 2012 12:55:35 GMT",
"version": "v2"
},
{
"created": "Wed, 31 Oct 2012 14:16:46 GMT",
"version": "v3"
}
] | 2013-03-06 | [
[
"Dahl",
"Mattias",
""
],
[
"Gicquaud",
"Romain",
""
],
[
"Humbert",
"Emmanuel",
""
]
] | The constraint equations of general relativity can in many cases be solved by the conformal method. We show that a slight modification of the equations of the conformal method admits no solution for a broad range of parameters. This suggests that the question of existence or non-existence of solutions to the original e... |
gr-qc/0509028 | Chung-Hsien Chou | Chung-Hsien Chou, Roh-Suan Tung, and Hoi-Lai Yu | Origin of the Immirzi Parameter | null | Phys.Rev. D72 (2005) 064016 | 10.1103/PhysRevD.72.064016 | null | gr-qc hep-th | null | Using quadratic spinor techniques we demonstrate that the Immirzi parameter
can be expressed as ratio between scalar and pseudo-scalar contributions in the
theory and can be interpreted as a measure of how Einstein gravity differs from
a generally constructed covariant theory for gravity. This interpretation is
indep... | [
{
"created": "Thu, 8 Sep 2005 03:54:56 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Chou",
"Chung-Hsien",
""
],
[
"Tung",
"Roh-Suan",
""
],
[
"Yu",
"Hoi-Lai",
""
]
] | Using quadratic spinor techniques we demonstrate that the Immirzi parameter can be expressed as ratio between scalar and pseudo-scalar contributions in the theory and can be interpreted as a measure of how Einstein gravity differs from a generally constructed covariant theory for gravity. This interpretation is indepen... |
gr-qc/9710099 | Justino Martinez | L. Herrera, J. Martinez | Dissipative fluids out of hydrostatic equilibrium | 21 pages, 1 postscript figure (LaTex 2.09 and epsfig.sty required)
Submitted to Classical and Quantum Gravity | Class.Quant.Grav.15:407-420,1998 | 10.1088/0264-9381/15/2/014 | null | gr-qc | null | In the context of the M\"{u}ller-Israel-Stewart second order phenomenological
theory for dissipative fluids, we analyze the effects of thermal conduction and
viscosity in a relativistic fluid, just after its departure from hydrostatic
equilibrium, on a time scale of the order of relaxation times. Stability and
causal... | [
{
"created": "Tue, 21 Oct 1997 11:43:12 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Herrera",
"L.",
""
],
[
"Martinez",
"J.",
""
]
] | In the context of the M\"{u}ller-Israel-Stewart second order phenomenological theory for dissipative fluids, we analyze the effects of thermal conduction and viscosity in a relativistic fluid, just after its departure from hydrostatic equilibrium, on a time scale of the order of relaxation times. Stability and causalit... |
2205.07655 | Vjacheslav Prokopov | Stanislav Alexeyev and Vyacheslav Prokopov | Extended Gravity Constraints at Different Scales | null | Universe 2022, 8(5), 283 | 10.3390/universe8050283 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review a set of the possible ways to constrain extended gravity models at
Galaxy clusters scales (the regime of dark energy explanations and comparison
with $\Lambda CDM$), for black hole shadows, gravitational wave astronomy,
binary pulsars, Solar system and Large Hadron Collider (consequences for high
energy phy... | [
{
"created": "Mon, 16 May 2022 13:19:47 GMT",
"version": "v1"
}
] | 2022-05-17 | [
[
"Alexeyev",
"Stanislav",
""
],
[
"Prokopov",
"Vyacheslav",
""
]
] | We review a set of the possible ways to constrain extended gravity models at Galaxy clusters scales (the regime of dark energy explanations and comparison with $\Lambda CDM$), for black hole shadows, gravitational wave astronomy, binary pulsars, Solar system and Large Hadron Collider (consequences for high energy physi... |
0812.4694 | Marko Vojinovic | Milovan Vasilic, Marko Vojinovic | Test membranes in Riemann-Cartan spacetimes | v2: Published version. Text completely rewritten. | Phys.Rev.D81:024025,2010 | 10.1103/PhysRevD.81.024025 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of brane-like extended objects in spacetimes with torsion is
derived from the conservation equations of stress-energy and spin tensors. Thus
obtained world-sheet equations are applied to macroscopic test membranes made
of spinning matter. Specifically, we consider membranes with maximally
symmetric distr... | [
{
"created": "Fri, 26 Dec 2008 17:27:22 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Mar 2010 15:48:01 GMT",
"version": "v2"
}
] | 2010-04-07 | [
[
"Vasilic",
"Milovan",
""
],
[
"Vojinovic",
"Marko",
""
]
] | The dynamics of brane-like extended objects in spacetimes with torsion is derived from the conservation equations of stress-energy and spin tensors. Thus obtained world-sheet equations are applied to macroscopic test membranes made of spinning matter. Specifically, we consider membranes with maximally symmetric distrib... |
2109.10600 | Mikhail Khlopunov | D. V. Gal'tsov and M. Khlopunov | Odd-dimensional gravitational waves from a binary system on a
three-brane | 9 pages, to be submitted to the Proceedings of the 16th Marcel
Grossmann meeting | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We consider gravitational radiation in the presence of non-compact extra
dimensions. If their number is odd, all spacetime becomes odd-dimensional and
formation of gravitational radiation becomes non-trivial because of violation
of the Huygens principle. Gravitational waves travel with the speed of light,
while the f... | [
{
"created": "Wed, 22 Sep 2021 09:04:18 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Sep 2021 16:03:58 GMT",
"version": "v2"
}
] | 2021-09-24 | [
[
"Gal'tsov",
"D. V.",
""
],
[
"Khlopunov",
"M.",
""
]
] | We consider gravitational radiation in the presence of non-compact extra dimensions. If their number is odd, all spacetime becomes odd-dimensional and formation of gravitational radiation becomes non-trivial because of violation of the Huygens principle. Gravitational waves travel with the speed of light, while the ful... |
2309.08017 | Donald Salisbury | Donald Salisbury | Diffeomorphism covariance of the canonical Barbero-Immirzi-Holst triad
theory | 11 pages, invited contribution to "Recent Advances in Gravity: A
Themed Issue in Honor of Prof. Jorge Pullin on His 60th Anniversary" | null | null | null | gr-qc physics.hist-ph | http://creativecommons.org/licenses/by/4.0/ | The vanishing phase space generator of the full four-dimensional
diffeomorphism-related symmetry group in the context of the
Barbero-Immirzi-Holst Lagrangian is derived directly for the first time from
Noether's second theorem. Its applicability in the construction of classical
diffeomorphism invariants is reviewed.
| [
{
"created": "Thu, 14 Sep 2023 20:25:02 GMT",
"version": "v1"
}
] | 2023-09-18 | [
[
"Salisbury",
"Donald",
""
]
] | The vanishing phase space generator of the full four-dimensional diffeomorphism-related symmetry group in the context of the Barbero-Immirzi-Holst Lagrangian is derived directly for the first time from Noether's second theorem. Its applicability in the construction of classical diffeomorphism invariants is reviewed. |
1203.2852 | Gernot Hei{\ss}el | Gernot Hei{\ss}el | Dynamics of locally rotationally symmetric Bianchi type VIII cosmologies
with anisotropic matter | 17 pages, 18 figures | null | 10.1007/s10714-012-1430-8 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is a study of the effects of anisotropic matter sources on the
qualitative evolution of spatially homogenous cosmologies of Bianchi type VIII.
The analysis is based on a dynamical system approach and makes use of an
anisotropic matter family developed by Calogero and Heinzle which generalises
perfect fluid... | [
{
"created": "Tue, 13 Mar 2012 16:24:01 GMT",
"version": "v1"
}
] | 2015-06-04 | [
[
"Heißel",
"Gernot",
""
]
] | This paper is a study of the effects of anisotropic matter sources on the qualitative evolution of spatially homogenous cosmologies of Bianchi type VIII. The analysis is based on a dynamical system approach and makes use of an anisotropic matter family developed by Calogero and Heinzle which generalises perfect fluids ... |
gr-qc/9807051 | Max Karlovini | Max Karlovini and Kjell Rosquist | Third rank Killing tensors in general relativity. The (1+1)-dimensional
case | 16 pages, LaTeX | Gen.Rel.Grav. 31 (1999) 1271-1294 | 10.1023/A:1026724824465 | USITP 98-14 | gr-qc | null | Third rank Killing tensors in (1+1)-dimensional geometries are investigated
and classified. It is found that a necessary and sufficient condition for such
a geometry to admit a third rank Killing tensor can always be formulated as a
quadratic PDE, of order three or lower, in a Kahler type potential for the
metric. Th... | [
{
"created": "Mon, 20 Jul 1998 14:20:23 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Karlovini",
"Max",
""
],
[
"Rosquist",
"Kjell",
""
]
] | Third rank Killing tensors in (1+1)-dimensional geometries are investigated and classified. It is found that a necessary and sufficient condition for such a geometry to admit a third rank Killing tensor can always be formulated as a quadratic PDE, of order three or lower, in a Kahler type potential for the metric. This... |
2106.06651 | Tomohiro Harada | Tomohiro Harada, Hideki Maeda, Takuma Sato | Thakurta metric does not describe a cosmological black hole | 6 pages, 2 figures, discussion expanded, conclusion unchanged | Phys. Lett. B 833 (2022) 137332 | 10.1016/j.physletb.2022.137332 | RUP-21-9 | gr-qc astro-ph.CO hep-th | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Recently, the Thakurta metric has been adopted as a model of primordial black
holes. We show that the spacetime described by this metric has neither
black-hole event horizon nor black-hole trapping horizon and involves the
violation of all the standard energy conditions as a solution of the Einstein
equation. Therefo... | [
{
"created": "Sat, 12 Jun 2021 00:33:58 GMT",
"version": "v1"
},
{
"created": "Sat, 19 Jun 2021 03:17:26 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Jun 2021 08:01:36 GMT",
"version": "v3"
},
{
"created": "Wed, 15 Jun 2022 06:40:39 GMT",
"version": "v4"
},
{
"c... | 2022-08-02 | [
[
"Harada",
"Tomohiro",
""
],
[
"Maeda",
"Hideki",
""
],
[
"Sato",
"Takuma",
""
]
] | Recently, the Thakurta metric has been adopted as a model of primordial black holes. We show that the spacetime described by this metric has neither black-hole event horizon nor black-hole trapping horizon and involves the violation of all the standard energy conditions as a solution of the Einstein equation. Therefore... |
1007.5204 | Sujoy Modak | Rabin Banerjee, Bibhas Ranjan Majhi, Sujoy Kumar Modak, Saurav Samanta | Killing Symmetries and Smarr Formula for Black Holes in Arbitrary
Dimensions | v3, minor changes over v2, LaTex, 16 pages, no figures, to appear in
Phys. Rev. D | Phys.Rev.D82:124002,2010 | 10.1103/PhysRevD.82.124002 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We calculate the effective Komar conserved quantities for the $N+1$
dimensional charged Myers-Perry spacetime. At the event horizon we derive a new
identity $K_{\chi^{\mu}}=2ST$ where the left hand side is the Komar conserved
quantity corresponding to the null Killing vector $\chi^{\mu}$ while in the
right hand side ... | [
{
"created": "Thu, 29 Jul 2010 12:38:22 GMT",
"version": "v1"
},
{
"created": "Tue, 21 Sep 2010 13:07:21 GMT",
"version": "v2"
},
{
"created": "Thu, 11 Nov 2010 08:26:29 GMT",
"version": "v3"
}
] | 2010-12-23 | [
[
"Banerjee",
"Rabin",
""
],
[
"Majhi",
"Bibhas Ranjan",
""
],
[
"Modak",
"Sujoy Kumar",
""
],
[
"Samanta",
"Saurav",
""
]
] | We calculate the effective Komar conserved quantities for the $N+1$ dimensional charged Myers-Perry spacetime. At the event horizon we derive a new identity $K_{\chi^{\mu}}=2ST$ where the left hand side is the Komar conserved quantity corresponding to the null Killing vector $\chi^{\mu}$ while in the right hand side $S... |
1011.3846 | George Alekseev A. | G.A. Alekseev | Thirty years of studies of integrable reductions of Einstein's field
equations | 22 pages, based on the opening remarks given at the MGAT1 parallel
session of the Twelfth Marcel Grossmann Meeting (Paris, July 12 - 18, 2009) | Proceedings of the Twelfth Marcel Grossmann Meeting on General
Relativity, World Scientific, Singapore, Part A, Plenary and Review talks, p.
645 - 666, (2011) (edited by Thibault Damour, Robert T Jantzen and Remo
Ruffini) | null | null | gr-qc hep-th nlin.SI | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | More than thirty years passed since the first discoveries of various aspects
of integrability of the symmetry reduced vacuum Einstein equations and
electrovacuum Einstein - Maxwell equations were made and gave rise to
constructions of powerful solution generating methods for these equations. In
the subsequent papers,... | [
{
"created": "Tue, 16 Nov 2010 22:41:45 GMT",
"version": "v1"
}
] | 2015-11-13 | [
[
"Alekseev",
"G. A.",
""
]
] | More than thirty years passed since the first discoveries of various aspects of integrability of the symmetry reduced vacuum Einstein equations and electrovacuum Einstein - Maxwell equations were made and gave rise to constructions of powerful solution generating methods for these equations. In the subsequent papers, t... |
1710.00218 | Carlo Rovelli | Carlo Rovelli | Black holes have more states than those giving the Bekenstein-Hawking
entropy: a simple argument | 3 pages. 1 figure | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is often assumed that the maximum number of independent states a black
hole may contain is $N_{BH}=e^{S_{BH}}$, where $S_{BH}=A/4$ is the
Bekenstein-Hawking entropy and $A$ the horizon area in Planck units. I present
a simple and straightforward argument showing that the number of states that
can be distinguished ... | [
{
"created": "Sat, 30 Sep 2017 16:20:58 GMT",
"version": "v1"
}
] | 2017-10-03 | [
[
"Rovelli",
"Carlo",
""
]
] | It is often assumed that the maximum number of independent states a black hole may contain is $N_{BH}=e^{S_{BH}}$, where $S_{BH}=A/4$ is the Bekenstein-Hawking entropy and $A$ the horizon area in Planck units. I present a simple and straightforward argument showing that the number of states that can be distinguished by... |
1811.02140 | Jun Tao | Fenghua Lu, Jun Tao and Peng Wang | Minimal Length Effects on Chaotic Motion of Particles around Black Hole
Horizon | arXiv admin note: text overlap with arXiv:1512.03560 | null | 10.1088/1475-7516/2018/12/036 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, it was conjectured that the Lyapunov exponent of chaotic motion of
a particle in a black hole is universally bounded from above by the surface
gravity of the black hole. On the other hand, the minimal length appears in
various theories of quantum gravity and leads to the deformed canonical
position-momentum... | [
{
"created": "Tue, 6 Nov 2018 02:59:53 GMT",
"version": "v1"
}
] | 2020-08-21 | [
[
"Lu",
"Fenghua",
""
],
[
"Tao",
"Jun",
""
],
[
"Wang",
"Peng",
""
]
] | Recently, it was conjectured that the Lyapunov exponent of chaotic motion of a particle in a black hole is universally bounded from above by the surface gravity of the black hole. On the other hand, the minimal length appears in various theories of quantum gravity and leads to the deformed canonical position-momentum c... |
2204.09367 | Song Li | Song Li and Wen-Biao Han | Gravitational waveform model based on photon motion for spinning black
holes | 14 pages, 12 figures | null | 10.1103/PhysRevD.106.104013 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The waveforms from binary black hole mergers include inspiral, merger, and
ringdown parts. Usually, the inspiral waveform can be obtained by calibrating
from post-Newtonian approximation; The merger and ringdown ones can be gotten
from the quasinormal modes with black hole perturbation theory. However, for
more gener... | [
{
"created": "Wed, 20 Apr 2022 10:17:52 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Nov 2022 07:18:52 GMT",
"version": "v2"
}
] | 2022-11-15 | [
[
"Li",
"Song",
""
],
[
"Han",
"Wen-Biao",
""
]
] | The waveforms from binary black hole mergers include inspiral, merger, and ringdown parts. Usually, the inspiral waveform can be obtained by calibrating from post-Newtonian approximation; The merger and ringdown ones can be gotten from the quasinormal modes with black hole perturbation theory. However, for more general... |
1510.00807 | Angelo Tartaglia | Angelo Tartaglia | The strained state cosmology | 10 pages, 1 figure, presented at the 9th Friedmann Seminar in Saint
Petersburg in June 2015. To appear on Physics Letters A | null | 10.1142/S0217751X16410153 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from some relevant facts concerning the behaviour of the universe
over large scale and time span, the analogy between the geometric approach of
General Relativ- ity and the classical description of an elastic strained
material continuum is discussed. Extending the elastic deformation approach to
four dimensi... | [
{
"created": "Sat, 3 Oct 2015 11:02:29 GMT",
"version": "v1"
}
] | 2016-02-03 | [
[
"Tartaglia",
"Angelo",
""
]
] | Starting from some relevant facts concerning the behaviour of the universe over large scale and time span, the analogy between the geometric approach of General Relativ- ity and the classical description of an elastic strained material continuum is discussed. Extending the elastic deformation approach to four dimension... |
gr-qc/0206061 | Sigbjorn Hervik | John D. Barrow and Sigbjorn Hervik | The Weyl tensor in Spatially Homogeneous Cosmological Models | 25 pages, 1ps figure. Refs added. To appear in CQG | Class.Quant.Grav. 19 (2002) 5173-5194 | 10.1088/0264-9381/19/20/311 | null | gr-qc astro-ph | null | We study the evolution of the Weyl curvature invariant in all spatially
homogeneous universe models containing a non-tilted gamma-law perfect fluid. We
investigate all the Bianchi and Thurston type universe models and calculate the
asymptotic evolution of Weyl curvature invariant for generic solutions to the
Einstein... | [
{
"created": "Thu, 20 Jun 2002 13:50:06 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Sep 2002 12:30:38 GMT",
"version": "v2"
}
] | 2009-11-07 | [
[
"Barrow",
"John D.",
""
],
[
"Hervik",
"Sigbjorn",
""
]
] | We study the evolution of the Weyl curvature invariant in all spatially homogeneous universe models containing a non-tilted gamma-law perfect fluid. We investigate all the Bianchi and Thurston type universe models and calculate the asymptotic evolution of Weyl curvature invariant for generic solutions to the Einstein f... |
1210.4699 | S Habib Mazharimousavi | S. Habib Mazharimousavi and M. Halilsoy | Comment on "Static and spherically symmetric black holes in f(R)
theories" | 4 pages no figure | Phys. Rev. D 86, 088501 (2012) | 10.1103/PhysRevD.86.088501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the interesting "near-horizon test" reported in (PRD84,
084006(2011), arXiv:1107.5727) for any static, spherically symmetric (SSS)
black hole solution admitted in f(R) gravity. Before adopting the necessary
conditions for the test, however, revisions are needed as we point out in this
Comment.
| [
{
"created": "Wed, 17 Oct 2012 11:23:38 GMT",
"version": "v1"
}
] | 2012-10-18 | [
[
"Mazharimousavi",
"S. Habib",
""
],
[
"Halilsoy",
"M.",
""
]
] | We consider the interesting "near-horizon test" reported in (PRD84, 084006(2011), arXiv:1107.5727) for any static, spherically symmetric (SSS) black hole solution admitted in f(R) gravity. Before adopting the necessary conditions for the test, however, revisions are needed as we point out in this Comment. |
1801.08999 | Clifford M. Will | Clifford M. Will | Testing general relativity with compact-body orbits: A modified
Einstein-Infeld-Hoffmann framework | Minor changes and corrections made to align with the published
version | Classical and Quantum Gravity 35, 085001 (2018) | 10.1088/1361-6382/aab1c6 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We describe a general framework for analyzing orbits of systems containing
compact objects (neutron stars or black holes) in a class of Lagrangian-based
alternative theories of gravity that also admit a global preferred reference
frame. The framework is based on a modified Einstein-Infeld-Hoffmann (EIH)
formalism dev... | [
{
"created": "Fri, 26 Jan 2018 22:48:46 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Mar 2018 17:26:29 GMT",
"version": "v2"
}
] | 2018-03-19 | [
[
"Will",
"Clifford M.",
""
]
] | We describe a general framework for analyzing orbits of systems containing compact objects (neutron stars or black holes) in a class of Lagrangian-based alternative theories of gravity that also admit a global preferred reference frame. The framework is based on a modified Einstein-Infeld-Hoffmann (EIH) formalism devel... |
1703.06814 | Alessandro Nagar | Alessandro Nagar, Gunnar Riemenschneider and Geraint Pratten | Impact of Numerical Relativity information on effective-one-body
waveform models | 24 pages, 20 figures, submitted to Phys. Rev. D | Phys. Rev. D 96, 084045 (2017) | 10.1103/PhysRevD.96.084045 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a comprehensive comparison of the spin-aligned effective-one-body
(EOB) waveform model of Nagar et al. [Phys. Rev. D93, 044046 (2016)], informed
using 40 numerical-relativity (NR) datasets, against a set of 149, $\ell=m=2$,
NR waveforms freely available through the Simulation Extreme Spacetime (SXS)
catalo... | [
{
"created": "Mon, 20 Mar 2017 16:03:11 GMT",
"version": "v1"
}
] | 2017-11-01 | [
[
"Nagar",
"Alessandro",
""
],
[
"Riemenschneider",
"Gunnar",
""
],
[
"Pratten",
"Geraint",
""
]
] | We present a comprehensive comparison of the spin-aligned effective-one-body (EOB) waveform model of Nagar et al. [Phys. Rev. D93, 044046 (2016)], informed using 40 numerical-relativity (NR) datasets, against a set of 149, $\ell=m=2$, NR waveforms freely available through the Simulation Extreme Spacetime (SXS) catalog.... |
gr-qc/0611130 | Yong-Wan Kim | Yun Soo Myung, Yong-Wan Kim, Young-Jai Park | Thermodynamics and evaporation of the noncommutative black hole | 16 pages, 6 figures, added references, to appear in JHEP | JHEP 0702:012,2007 | 10.1088/1126-6708/2007/02/012 | null | gr-qc | null | We investigate the thermodynamics of the noncommutative black hole whose
static picture is similar to that of the nonsingular black hole known as the de
Sitter-Schwarzschild black hole. It turns out that the final remnant of
extremal black hole is a thermodynamically stable object. We describe the
evaporation process... | [
{
"created": "Fri, 24 Nov 2006 11:01:31 GMT",
"version": "v1"
},
{
"created": "Sun, 21 Jan 2007 09:35:08 GMT",
"version": "v2"
}
] | 2010-10-27 | [
[
"Myung",
"Yun Soo",
""
],
[
"Kim",
"Yong-Wan",
""
],
[
"Park",
"Young-Jai",
""
]
] | We investigate the thermodynamics of the noncommutative black hole whose static picture is similar to that of the nonsingular black hole known as the de Sitter-Schwarzschild black hole. It turns out that the final remnant of extremal black hole is a thermodynamically stable object. We describe the evaporation process o... |
0704.1447 | Eran Rosenthal | Eanna E. Flanagan, Eran Rosenthal | Can Gravity Probe B usefully constrain torsion gravity theories? | 13 pages, a small change to the terminology | Phys.Rev.D75:124016,2007 | 10.1103/PhysRevD.75.124016 | null | gr-qc astro-ph hep-th | null | In most theories of gravity involving torsion, the source for torsion is the
intrinsic spin of matter. Since the spins of fermions are normally randomly
oriented in macroscopic bodies, the torsion generated is normally negligible.
However, in a recent paper, Mao et al. point out that there is a class of
theories in w... | [
{
"created": "Wed, 11 Apr 2007 15:39:20 GMT",
"version": "v1"
},
{
"created": "Mon, 14 May 2007 22:31:29 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Flanagan",
"Eanna E.",
""
],
[
"Rosenthal",
"Eran",
""
]
] | In most theories of gravity involving torsion, the source for torsion is the intrinsic spin of matter. Since the spins of fermions are normally randomly oriented in macroscopic bodies, the torsion generated is normally negligible. However, in a recent paper, Mao et al. point out that there is a class of theories in whi... |
2305.09694 | Gamal G.L. Nashed | G.G.L. Nashed | Isotropic stellar model in mimetic theory | 13 pages, four figures and two tables | Gen.Rel.Grav. 55 (2023) 5, 63 | 10.1007/s10714-023-03111-w | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | We investigate how to derive an isotropic stellar model in the framework of
mimetic gravitational theory. Recently, this theory has gained big interest due
to its difference from Einstein's general relativity (GR), especially in the
domain non-vacuum solutions. In this regard, we apply the field equation of
mimetic g... | [
{
"created": "Tue, 16 May 2023 06:07:01 GMT",
"version": "v1"
}
] | 2023-05-24 | [
[
"Nashed",
"G. G. L.",
""
]
] | We investigate how to derive an isotropic stellar model in the framework of mimetic gravitational theory. Recently, this theory has gained big interest due to its difference from Einstein's general relativity (GR), especially in the domain non-vacuum solutions. In this regard, we apply the field equation of mimetic gra... |
2402.14733 | Fabio Aratore | Fabio Aratore, Oleg Yu. Tsupko and Volker Perlick | Constraining spherically symmetric metrics by the gap between photon
rings | 15 pages, 5 figures, 1 table | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational lensing of luminous matter that surrounds a black hole or some
other sufficiently compact object produces an infinite sequence of images.
Besides the direct (or primary) image, it comprises demagnified and deformed
replicas of the original known as photon rings which are progressively nearing
the bounda... | [
{
"created": "Thu, 22 Feb 2024 17:44:44 GMT",
"version": "v1"
},
{
"created": "Mon, 17 Jun 2024 14:36:53 GMT",
"version": "v2"
}
] | 2024-06-18 | [
[
"Aratore",
"Fabio",
""
],
[
"Tsupko",
"Oleg Yu.",
""
],
[
"Perlick",
"Volker",
""
]
] | Gravitational lensing of luminous matter that surrounds a black hole or some other sufficiently compact object produces an infinite sequence of images. Besides the direct (or primary) image, it comprises demagnified and deformed replicas of the original known as photon rings which are progressively nearing the boundary... |
gr-qc/9707006 | null | I.Oda | Quantum Evaporating Black Holes in Higher Dimensions | 10 pages, phyzzx | null | null | EDO-EP-14 | gr-qc | null | We study an $N + 1$ dimensional generalization of the Schwarzschild black
hole from the quantum mechanical viewpoint. It is shown that the mass loss rate
of this higher dimensional black hole due to the black hole radiation is
proportional to $1 \over r^{N-1}$ where $r$ is the radial coordinate. This fact
implies tha... | [
{
"created": "Thu, 3 Jul 1997 07:31:48 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Oda",
"I.",
""
]
] | We study an $N + 1$ dimensional generalization of the Schwarzschild black hole from the quantum mechanical viewpoint. It is shown that the mass loss rate of this higher dimensional black hole due to the black hole radiation is proportional to $1 \over r^{N-1}$ where $r$ is the radial coordinate. This fact implies that ... |
1901.11532 | Alberto Molgado | Jasel Berra-Montiel, Alberto Molgado and Angel Rodriguez-Lopez | Polysymplectic formulation for BF gravity with Immirzi parameter | 19 pages, no figures | Class. Quantum Grav. 36 115003 (2019) | 10.1088/1361-6382/ab1365 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The polysymplectic formulation of the CMPR action, which is a BF-type
formulation of General Relativity that involves an arbitrary Immirzi parameter,
is performed. We implement a particular scheme within this covariant
Hamiltonian approach to analyze the constraints that characterize the CMPR
model. By means of the p... | [
{
"created": "Thu, 31 Jan 2019 18:55:09 GMT",
"version": "v1"
},
{
"created": "Tue, 21 May 2019 15:08:42 GMT",
"version": "v2"
}
] | 2019-05-22 | [
[
"Berra-Montiel",
"Jasel",
""
],
[
"Molgado",
"Alberto",
""
],
[
"Rodriguez-Lopez",
"Angel",
""
]
] | The polysymplectic formulation of the CMPR action, which is a BF-type formulation of General Relativity that involves an arbitrary Immirzi parameter, is performed. We implement a particular scheme within this covariant Hamiltonian approach to analyze the constraints that characterize the CMPR model. By means of the pri... |
2402.02383 | Xuefeng Zhang | Yuzhou Fang, Xuefeng Zhang, Fangyuan Fu, Hongyin Li | On payload architecture and pointing control strategies for TianQin | 14 pages, 17 figures, accepted by Phys. Rev. D | Phys. Rev. D 109, 062001 (2024) | 0.1103/PhysRevD.109.062001 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | TianQin is a proposed mission for space-based gravitational-wave detection
that features a triangular constellation in circular high Earth orbits. The
mission entails three drag-free controlled satellites and long-range laser
interferometry with stringent beam pointing requirements at remote satellites.
For the paylo... | [
{
"created": "Sun, 4 Feb 2024 07:49:11 GMT",
"version": "v1"
}
] | 2024-03-05 | [
[
"Fang",
"Yuzhou",
""
],
[
"Zhang",
"Xuefeng",
""
],
[
"Fu",
"Fangyuan",
""
],
[
"Li",
"Hongyin",
""
]
] | TianQin is a proposed mission for space-based gravitational-wave detection that features a triangular constellation in circular high Earth orbits. The mission entails three drag-free controlled satellites and long-range laser interferometry with stringent beam pointing requirements at remote satellites. For the payload... |
0903.5173 | Kirill Bronnikov | Kirill A. Bronnikov, Alexei A. Starobinsky | Once again on thin-shell wormholes in scalar-tensor gravity | 5 pages, no figures. A few misprints corrected. Version published in
MPLA | Mod.Phys.Lett.A24:1559-1564,2009 | 10.1142/S0217732309030928 | RESCEU-5/09 | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is proved that all thin-shell wormholes built from two identical regions
of vacuum static, spherically symmetric space-times have a negative shell
surface energy density in any scalar-tensor theory of gravity with a non-ghost
massless scalar field and a non-ghost graviton.
| [
{
"created": "Mon, 30 Mar 2009 10:25:05 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Apr 2009 15:15:14 GMT",
"version": "v2"
},
{
"created": "Thu, 2 Jul 2009 05:11:34 GMT",
"version": "v3"
}
] | 2009-07-22 | [
[
"Bronnikov",
"Kirill A.",
""
],
[
"Starobinsky",
"Alexei A.",
""
]
] | It is proved that all thin-shell wormholes built from two identical regions of vacuum static, spherically symmetric space-times have a negative shell surface energy density in any scalar-tensor theory of gravity with a non-ghost massless scalar field and a non-ghost graviton. |
1808.07502 | Paul Chesler | Paul M. Chesler, Erik Curiel and Ramesh Narayan | Numerical evolution of shocks in the interior of Kerr black holes | 7 pages, 8 figures, discussion concerning tidal forces added,
interpretation of curvature brick wall corrected | Phys. Rev. D 99, 084033 (2019) | 10.1103/PhysRevD.99.084033 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We numerically solve Einstein's equations coupled to a scalar field in the
interior of Kerr black holes. We find shock waves form near the inner horizon.
The shocks grow exponentially in amplitude and need not be axisymmetric.
Observers who pass through the shocks experience exponentially large tidal
forces and are a... | [
{
"created": "Wed, 22 Aug 2018 18:06:41 GMT",
"version": "v1"
},
{
"created": "Tue, 16 Oct 2018 02:53:44 GMT",
"version": "v2"
},
{
"created": "Mon, 21 Jan 2019 01:20:22 GMT",
"version": "v3"
}
] | 2019-04-24 | [
[
"Chesler",
"Paul M.",
""
],
[
"Curiel",
"Erik",
""
],
[
"Narayan",
"Ramesh",
""
]
] | We numerically solve Einstein's equations coupled to a scalar field in the interior of Kerr black holes. We find shock waves form near the inner horizon. The shocks grow exponentially in amplitude and need not be axisymmetric. Observers who pass through the shocks experience exponentially large tidal forces and are acc... |
1301.6853 | Edward J. Kim | Edward J. Kim and Shinsuke Kawai | Chaotic dynamics of the Bianchi IX universe in Gauss-Bonnet gravity | 9 pages, 8 figures, REVTex 4 | Phys. Rev. D 87, 083517 (2013) | 10.1103/PhysRevD.87.083517 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the dynamics of closed FRW universe and anisotropic Bianchi
type-IX universe characterized by two scale factors in a gravity theory
including a higher curvature (Gauss-Bonnet) term. The presence of the
cosmological constant creates a critical point of saddle type in the phase
space of the system. An or... | [
{
"created": "Tue, 29 Jan 2013 07:41:02 GMT",
"version": "v1"
}
] | 2013-04-19 | [
[
"Kim",
"Edward J.",
""
],
[
"Kawai",
"Shinsuke",
""
]
] | We investigate the dynamics of closed FRW universe and anisotropic Bianchi type-IX universe characterized by two scale factors in a gravity theory including a higher curvature (Gauss-Bonnet) term. The presence of the cosmological constant creates a critical point of saddle type in the phase space of the system. An orbi... |
1204.1879 | William Joseph Weber | F. Antonucci, A. Cavalleri, R. Dolesi, M. Hueller, D. Nicolodi, H. B.
Tu, S. Vitale, and W. J. Weber | The interaction between stray electrostatic fields and a charged
free-falling test mass | Minor edits in PRL publication process | Phys. Rev. Lett. 108, 181101(2012) | 10.1103/PhysRevLett.108.181101 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an experimental analysis of force noise caused by stray
electrostatic fields acting on a charged test mass inside a conducting
enclosure, a key problem for precise gravitational experiments. Measurement of
the average field that couples to test mass charge, and its fluctuations, is
performed with two indep... | [
{
"created": "Mon, 9 Apr 2012 13:54:33 GMT",
"version": "v1"
},
{
"created": "Mon, 7 May 2012 20:04:16 GMT",
"version": "v2"
}
] | 2012-05-09 | [
[
"Antonucci",
"F.",
""
],
[
"Cavalleri",
"A.",
""
],
[
"Dolesi",
"R.",
""
],
[
"Hueller",
"M.",
""
],
[
"Nicolodi",
"D.",
""
],
[
"Tu",
"H. B.",
""
],
[
"Vitale",
"S.",
""
],
[
"Weber",
"W. J.",
... | We present an experimental analysis of force noise caused by stray electrostatic fields acting on a charged test mass inside a conducting enclosure, a key problem for precise gravitational experiments. Measurement of the average field that couples to test mass charge, and its fluctuations, is performed with two indepen... |
gr-qc/0312065 | Michael Kuchiev | M. Yu. Kuchiev, V. V. Flambaum | Scattering of scalar particles by a black hole | 7 pages, revtex, 1 figure | Phys.Rev.D70:044022,2004 | 10.1103/PhysRevD.70.044022 | null | gr-qc astro-ph hep-th | null | The absorption cross section for scalar particle impact on a Schwarzschild
black hole is found. The process is dominated by two physical phenomena. One of
them is the well-known greybody factor that arises from the energy-dependent
potential barrier outside the horizon that filters the incoming and outgoing
waves. Th... | [
{
"created": "Fri, 12 Dec 2003 02:26:34 GMT",
"version": "v1"
}
] | 2009-08-18 | [
[
"Kuchiev",
"M. Yu.",
""
],
[
"Flambaum",
"V. V.",
""
]
] | The absorption cross section for scalar particle impact on a Schwarzschild black hole is found. The process is dominated by two physical phenomena. One of them is the well-known greybody factor that arises from the energy-dependent potential barrier outside the horizon that filters the incoming and outgoing waves. The ... |
2403.13708 | Celia Escamilla-Rivera | Aram Aguilar, Celia Escamilla-Rivera, Jackson Levi Said and Jurgen
Mifsud | Non-fluid like Boltzmann code architecture for early times f(T)
cosmologies | 17 pages, 6 figures. Includes code architecture | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | There have been several works that have studied scalar cosmological
perturbations in $f(T)$ teleparallel gravity theories to understand early
cosmic times dynamics. In this direction, the perturbations presented have been
performed by considering $f(T)$ extensions as an effective fluid-like scheme,
where the equation... | [
{
"created": "Wed, 20 Mar 2024 16:11:09 GMT",
"version": "v1"
}
] | 2024-03-21 | [
[
"Aguilar",
"Aram",
""
],
[
"Escamilla-Rivera",
"Celia",
""
],
[
"Said",
"Jackson Levi",
""
],
[
"Mifsud",
"Jurgen",
""
]
] | There have been several works that have studied scalar cosmological perturbations in $f(T)$ teleparallel gravity theories to understand early cosmic times dynamics. In this direction, the perturbations presented have been performed by considering $f(T)$ extensions as an effective fluid-like scheme, where the equation-o... |
1901.04607 | Ramon Herrera | Ramon Herrera | Reconstructing braneworld inflation | Accepted version in PRD, 26 pages and 3 figures | Phys. Rev. D 99, 103510 (2019) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The reconstruction of a braneworld inflationary universe considering the
parametrization (or attractor) of the scalar spectral index $n_s(N)$ in terms
of the number of $e$-foldings N is developed. We also study the possibility
that the reconstruction for the scenario of braneworld inflation, can be
realized in terms ... | [
{
"created": "Mon, 14 Jan 2019 23:56:34 GMT",
"version": "v1"
},
{
"created": "Fri, 8 Mar 2019 18:08:25 GMT",
"version": "v2"
},
{
"created": "Fri, 3 May 2019 22:47:16 GMT",
"version": "v3"
}
] | 2019-05-15 | [
[
"Herrera",
"Ramon",
""
]
] | The reconstruction of a braneworld inflationary universe considering the parametrization (or attractor) of the scalar spectral index $n_s(N)$ in terms of the number of $e$-foldings N is developed. We also study the possibility that the reconstruction for the scenario of braneworld inflation, can be realized in terms of... |
gr-qc/0101049 | Yuri Grats | Yu.V. Grats, A.A. Rossikhin, and A.O. Sboichakov | Chiral String in a Curved Space: Gravitational Self-Action | 5 pages, LaTex | Mod.Phys.Lett. A16 (2001) 725-730 | 10.1142/S021773230100353X | null | gr-qc | null | We analyze the effective action describing the linearised gravitational
self-action for a classical superconducting string in a curved spacetime. It is
shown that the divergent part of the effective action is equal to zero for the
both Nambu-Goto and chiral superconducting string.
| [
{
"created": "Fri, 12 Jan 2001 18:08:28 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Grats",
"Yu. V.",
""
],
[
"Rossikhin",
"A. A.",
""
],
[
"Sboichakov",
"A. O.",
""
]
] | We analyze the effective action describing the linearised gravitational self-action for a classical superconducting string in a curved spacetime. It is shown that the divergent part of the effective action is equal to zero for the both Nambu-Goto and chiral superconducting string. |
1811.05510 | Nelson Videla Dr. | Ramon Herrera, Nelson Videla, and Marco Olivares | G-Warm inflation: Intermediate model | 30 pages and 4 figures | Phys. Rev. D 100, 023529 (2019) | 10.1103/PhysRevD.100.023529 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A warm-intermediate inflationary universe model is studied in the presence of
the Galileon coupling $G(\phi,X)=g(\phi)X$. General conditions required for
successful inflation are deduced and discussed from the background and
cosmological perturbations under slow-roll approximation. In our analyze we
assume that the d... | [
{
"created": "Tue, 13 Nov 2018 19:45:10 GMT",
"version": "v1"
}
] | 2019-07-24 | [
[
"Herrera",
"Ramon",
""
],
[
"Videla",
"Nelson",
""
],
[
"Olivares",
"Marco",
""
]
] | A warm-intermediate inflationary universe model is studied in the presence of the Galileon coupling $G(\phi,X)=g(\phi)X$. General conditions required for successful inflation are deduced and discussed from the background and cosmological perturbations under slow-roll approximation. In our analyze we assume that the dyn... |
1402.2931 | Giampiero Esposito Dr. | Emmanuele Battista, Giampiero Esposito | Restricted three-body problem in effective-field-theory models of
gravity | 20 pages, latex, 8 figures | null | 10.1103/PhysRevD.89.084030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the outstanding problems of classical celestial mechanics was the
restricted 3-body prob- lem, in which a planetoid of small mass is subject to
the Newtonian attraction of two celestial bodies of large mass, as it occurs,
for example, in the sun-earth-moon system. On the other hand, over the last
decades, a sy... | [
{
"created": "Wed, 12 Feb 2014 18:53:13 GMT",
"version": "v1"
}
] | 2015-06-18 | [
[
"Battista",
"Emmanuele",
""
],
[
"Esposito",
"Giampiero",
""
]
] | One of the outstanding problems of classical celestial mechanics was the restricted 3-body prob- lem, in which a planetoid of small mass is subject to the Newtonian attraction of two celestial bodies of large mass, as it occurs, for example, in the sun-earth-moon system. On the other hand, over the last decades, a syst... |
0706.4163 | Z. Ya. Turakulov | A. T. Muminov | Variational Principles for Constrained Electromagnetic Field and
Papapetrou Equation | 14 pages. submitted to Zeitschrift fuer Naturforschung | null | null | null | gr-qc | null | In our previous article [4] an approach to derive Papapetrou equations for
constrained electromagnetic field was demonstrated by use of field variational
principles. The aim of current work is to present more universal technique of
deduction of the equations which could be applied to another types of
non-scalar field... | [
{
"created": "Thu, 28 Jun 2007 08:17:29 GMT",
"version": "v1"
}
] | 2007-06-29 | [
[
"Muminov",
"A. T.",
""
]
] | In our previous article [4] an approach to derive Papapetrou equations for constrained electromagnetic field was demonstrated by use of field variational principles. The aim of current work is to present more universal technique of deduction of the equations which could be applied to another types of non-scalar fields.... |
gr-qc/0309122 | Edisom S. Moreira jr | Vitorio A. De Lorenci and Edisom S. Moreira Jr | Spinning strings, cosmic dislocations and chronology protection | Published version, 4 pages, REVTeX4 | Phys.Rev. D70 (2004) 047502 | 10.1103/PhysRevD.70.047502 | null | gr-qc hep-th | null | A massless scalar field is quantized in the background of a spinning string
with cosmic dislocation. By increasing the spin density toward the dislocation
parameter, a region containing closed timelike curves (CTCs) eventually forms
around the defect. Correspondingly, the propagator tends to the ordinary cosmic
strin... | [
{
"created": "Thu, 25 Sep 2003 12:12:27 GMT",
"version": "v1"
},
{
"created": "Sat, 21 Aug 2004 14:06:57 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"De Lorenci",
"Vitorio A.",
""
],
[
"Moreira",
"Edisom S.",
"Jr"
]
] | A massless scalar field is quantized in the background of a spinning string with cosmic dislocation. By increasing the spin density toward the dislocation parameter, a region containing closed timelike curves (CTCs) eventually forms around the defect. Correspondingly, the propagator tends to the ordinary cosmic string ... |
1910.09762 | Rui Xu | Rui Xu | Modifications to Plane Gravitational Waves from Minimal Lorentz
Violation | 13 pages | Symmetry 2019, 11(10), 1318 | 10.3390/sym11101318 | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | General Relativity predicts two modes for plane gravitational waves. When a
tiny violation of Lorentz invariance occurs, the two gravitational wave modes
are modified. We use perturbation theory to study the detailed form of the
modifications to the two gravitational wave modes from the minimal
Lorentz-violation coup... | [
{
"created": "Tue, 22 Oct 2019 04:35:04 GMT",
"version": "v1"
}
] | 2019-10-23 | [
[
"Xu",
"Rui",
""
]
] | General Relativity predicts two modes for plane gravitational waves. When a tiny violation of Lorentz invariance occurs, the two gravitational wave modes are modified. We use perturbation theory to study the detailed form of the modifications to the two gravitational wave modes from the minimal Lorentz-violation coupli... |
2006.15610 | Khalid Saifullah | Askar Ali and Khalid Saifullah | Lovelock black holes surrounded by dark fluid in power-Yang-Mills
massive gravity | null | null | 10.1088/1475-7516/2021/10/058 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a model where massive static spherically symmetric black hole, in
the presence of power-Yang-Mills source, is surrounded by a dark fluid with
non-linear equation of state. In this set up we construct a new class of
magnetized Lovelock black hole solutions of the gravitational field equations.
In particula... | [
{
"created": "Sun, 28 Jun 2020 13:56:44 GMT",
"version": "v1"
}
] | 2021-10-27 | [
[
"Ali",
"Askar",
""
],
[
"Saifullah",
"Khalid",
""
]
] | We consider a model where massive static spherically symmetric black hole, in the presence of power-Yang-Mills source, is surrounded by a dark fluid with non-linear equation of state. In this set up we construct a new class of magnetized Lovelock black hole solutions of the gravitational field equations. In particular,... |
1402.3972 | Chongoh Lee | Chong Oh Lee | The Thermodynamic Properties of Warped Taub-NUT AdS Black String | 17 pages, 3 figures, expanded with new input, some references added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When we consider five-dimensional warped Taub-NUT/Bolt AdS black string with
minimally coupled massive scalar field, we calculate entropy by using the brick
wall method. It is found that they are proportional to being quadratically
divergent in a cutoff parameter. In particular, we show that the entropy of
warped Tau... | [
{
"created": "Mon, 17 Feb 2014 11:41:46 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Mar 2014 19:19:46 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Mar 2015 08:20:51 GMT",
"version": "v3"
},
{
"created": "Mon, 23 Jan 2017 21:04:06 GMT",
"version": "v4"
}
] | 2017-01-25 | [
[
"Lee",
"Chong Oh",
""
]
] | When we consider five-dimensional warped Taub-NUT/Bolt AdS black string with minimally coupled massive scalar field, we calculate entropy by using the brick wall method. It is found that they are proportional to being quadratically divergent in a cutoff parameter. In particular, we show that the entropy of warped Taub-... |
2001.04979 | Vittorio De Falco Dr | Vittorio De Falco, William Borrelli | Detection of chaos in the general relativistic Poynting-Robertson
effect: Kerr equatorial plane | 10 pages, 8 figures; published on Phys. Rev. D | Phys. Rev. D (2021) 103, 064014 | 10.1103/PhysRevD.103.064014 | null | gr-qc hep-th math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | The general relativistic Poynting-Robertson effect is a dissipative and
non-linear dynamical system obtained by perturbing through radiation processes
the geodesic motion of test particles orbiting around a spinning compact
object, described by the Kerr metric. Using the Melnikov method we find that,
in a suitable ra... | [
{
"created": "Tue, 14 Jan 2020 10:45:02 GMT",
"version": "v1"
},
{
"created": "Thu, 11 Feb 2021 16:11:00 GMT",
"version": "v2"
},
{
"created": "Tue, 9 Mar 2021 18:24:31 GMT",
"version": "v3"
}
] | 2021-03-10 | [
[
"De Falco",
"Vittorio",
""
],
[
"Borrelli",
"William",
""
]
] | The general relativistic Poynting-Robertson effect is a dissipative and non-linear dynamical system obtained by perturbing through radiation processes the geodesic motion of test particles orbiting around a spinning compact object, described by the Kerr metric. Using the Melnikov method we find that, in a suitable rang... |
2407.17547 | R. K. L. Lo | Rico K. L. Lo, Luka Vujeva, Jose Mar\'ia Ezquiaga, Juno C. L. Chan | Observational Signatures of Highly Magnified Gravitational Waves from
Compact Binary Coalescence | 6 pages, 3 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational lensing has empowered telescopes to discover astronomical
objects that are otherwise out of reach without being highly magnified by
foreground structures. While we expect gravitational waves (GWs) from compact
binary coalescences to also experience lensing, the phenomenology of highly
magnified GWs has ... | [
{
"created": "Wed, 24 Jul 2024 18:00:00 GMT",
"version": "v1"
}
] | 2024-07-26 | [
[
"Lo",
"Rico K. L.",
""
],
[
"Vujeva",
"Luka",
""
],
[
"Ezquiaga",
"Jose María",
""
],
[
"Chan",
"Juno C. L.",
""
]
] | Gravitational lensing has empowered telescopes to discover astronomical objects that are otherwise out of reach without being highly magnified by foreground structures. While we expect gravitational waves (GWs) from compact binary coalescences to also experience lensing, the phenomenology of highly magnified GWs has no... |
1105.2192 | Alfonso Garc\'ia-Parrado G\'omez-Lobo Dr. | Alfonso Garc\'ia-Parrado G\'omez-Lobo and Ettore Minguzzi | Product posets and causal automorphisms of the plane | 4 pages, no figures. To appear in Classical and Quantum Gravity | Class. Quantum Grav. 28 (2011) 147001 | 10.1088/0264-9381/28/14/147001 | null | gr-qc math.GT | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A simple characterization of the causal automorphisms of 1+1 Minkowski
spacetime is given.
| [
{
"created": "Wed, 11 May 2011 14:05:50 GMT",
"version": "v1"
}
] | 2011-06-23 | [
[
"Gómez-Lobo",
"Alfonso García-Parrado",
""
],
[
"Minguzzi",
"Ettore",
""
]
] | A simple characterization of the causal automorphisms of 1+1 Minkowski spacetime is given. |
2111.09105 | RuiFeng Zheng | Ruifeng Zheng | New Insights on the Thermodynamic Equilibrium of Black Hole and Thermal
Radiation | 8 pages, 3 figures, 1 table | null | null | null | gr-qc astro-ph.CO | http://creativecommons.org/licenses/by/4.0/ | The thermal balance between the black hole and surrounding thermal radiation
is an interesting topic. The primordial black hole is a type of black hole
formed in the early universe, especially during the thermal radiation period of
the early universe. Driven by gravity, thermal radiation will collapse to form
a black... | [
{
"created": "Fri, 12 Nov 2021 06:53:30 GMT",
"version": "v1"
},
{
"created": "Wed, 1 Dec 2021 07:49:26 GMT",
"version": "v2"
}
] | 2021-12-02 | [
[
"Zheng",
"Ruifeng",
""
]
] | The thermal balance between the black hole and surrounding thermal radiation is an interesting topic. The primordial black hole is a type of black hole formed in the early universe, especially during the thermal radiation period of the early universe. Driven by gravity, thermal radiation will collapse to form a black h... |
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