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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0904.0414 | Jeffrey Winicour | Jeffrey Winicour | Geometrization of metric boundary data for Einstein's equations | Article to appear in Gen. Rel. Grav. volume in memory of Juergen
Ehlers | Gen.Rel.Grav.41:1909-1926,2009 | 10.1007/s10714-009-0801-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The principle part of Einstein equations in the harmonic gauge consists of a
constrained system of 10 curved space wave equations for the components of the
space-time metric. A well-posed initial boundary value problem based upon a new
formulation of constraint-preserving boundary conditions of the Sommerfeld type
ha... | [
{
"created": "Thu, 2 Apr 2009 16:13:35 GMT",
"version": "v1"
}
] | 2009-09-28 | [
[
"Winicour",
"Jeffrey",
""
]
] | The principle part of Einstein equations in the harmonic gauge consists of a constrained system of 10 curved space wave equations for the components of the space-time metric. A well-posed initial boundary value problem based upon a new formulation of constraint-preserving boundary conditions of the Sommerfeld type has ... |
2105.03433 | Justin Feng | Justin C. Feng, Jos\'e P. S. Lemos, Richard A. Matzner | Self-collision of a portal wormhole | 12 pages, 8 figures | Physical Review D 103, 124037 (2021) | 10.1103/PhysRevD.103.124037 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the self-collision of portals in classical general relativity.
Portals are wormholes supported by a single loop of negative mass cosmic
string, and being wormholes, portals have a nontrivial topology. Portals can be
constructed so that the curvature is zero everywhere outside the cosmic string,
with vanis... | [
{
"created": "Fri, 7 May 2021 18:00:00 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jun 2021 16:04:07 GMT",
"version": "v2"
}
] | 2021-06-15 | [
[
"Feng",
"Justin C.",
""
],
[
"Lemos",
"José P. S.",
""
],
[
"Matzner",
"Richard A.",
""
]
] | We consider the self-collision of portals in classical general relativity. Portals are wormholes supported by a single loop of negative mass cosmic string, and being wormholes, portals have a nontrivial topology. Portals can be constructed so that the curvature is zero everywhere outside the cosmic string, with vanishi... |
2402.07620 | Christian Boehmer | Sudan Hansraj, Chevarra Hansraj, Njabulo Mkhize, Abdelghani Errehymy,
Christian G. Boehmer | Generating exact polytropes in non-conservative unimodular geometries | 14 pages, 2 figures | Physics of the Dark Universe 44 (2024) 101443 | 10.1016/j.dark.2024.101443 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The trace-free Einstein equations contain one equation less than the complete
field equations. In a static and spherically symmetric spacetime, the number of
field equations is thus reduced to two. The equation of pressure isotropy of
general relativity, however, is preserved thus showing that any known perfect
fluid... | [
{
"created": "Mon, 12 Feb 2024 12:54:10 GMT",
"version": "v1"
}
] | 2024-03-27 | [
[
"Hansraj",
"Sudan",
""
],
[
"Hansraj",
"Chevarra",
""
],
[
"Mkhize",
"Njabulo",
""
],
[
"Errehymy",
"Abdelghani",
""
],
[
"Boehmer",
"Christian G.",
""
]
] | The trace-free Einstein equations contain one equation less than the complete field equations. In a static and spherically symmetric spacetime, the number of field equations is thus reduced to two. The equation of pressure isotropy of general relativity, however, is preserved thus showing that any known perfect fluid s... |
0912.4816 | Pradip Mukherjee | Pradip Mukherjee | Poincare gauge theory from higher derivative matter lagrangean | Some modifications of text,typos corrected, 8 pages, latex This
version to be published in Classical and Quantum Gravity | Class.Quant.Grav.27:215008,2010 | 10.1088/0264-9381/27/21/215008 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Starting from matter lagrangean containing higher order derivative than the
first, we construct the Poincare gauge theory by localising the Poincare
symmetry of the matter theory. The construction is shown to follow the usual
geometric procedure of gravitational coupling, thereby buttressing the
geometric interpretat... | [
{
"created": "Thu, 24 Dec 2009 09:21:21 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Jun 2010 18:38:37 GMT",
"version": "v2"
},
{
"created": "Tue, 10 Aug 2010 15:44:47 GMT",
"version": "v3"
}
] | 2010-11-04 | [
[
"Mukherjee",
"Pradip",
""
]
] | Starting from matter lagrangean containing higher order derivative than the first, we construct the Poincare gauge theory by localising the Poincare symmetry of the matter theory. The construction is shown to follow the usual geometric procedure of gravitational coupling, thereby buttressing the geometric interpretatio... |
2207.08270 | Sandro D. P. Vitenti | Mariana Penna-Lima, Nelson Pinto-Neto, Sandro D. P. Vitenti | New formalism to define vacuum states for scalar fields in curved
space-times | 31 pages, 6 figures | null | 10.1103/PhysRevD.107.065019 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of finding a vacuum definition for a single quantum field in
curved space-times is discussed under a new geometrical perspective. The phase
space dynamics of the quantum field modes are mapped to curves in a
2-dimensional hyperbolic metric space, in which distances between neighbor
points are shown to be ... | [
{
"created": "Sun, 17 Jul 2022 19:43:32 GMT",
"version": "v1"
}
] | 2023-04-12 | [
[
"Penna-Lima",
"Mariana",
""
],
[
"Pinto-Neto",
"Nelson",
""
],
[
"Vitenti",
"Sandro D. P.",
""
]
] | The problem of finding a vacuum definition for a single quantum field in curved space-times is discussed under a new geometrical perspective. The phase space dynamics of the quantum field modes are mapped to curves in a 2-dimensional hyperbolic metric space, in which distances between neighbor points are shown to be pr... |
2402.17388 | Guillem Dom\`enech | Guillem Dom\`enech | GW Backgrounds associated with PBHs | To appear [with updates] in the book "Primordial Black Holes", ed.
Chris Byrnes, Gabriele Franciolini, Tomohiro Harada, Paolo Pani, Misao
Sasaki; Springer (2024). I tried to show the generation of induced GWs with
new illustrations, two of them in real space. So, any comments are welcome,
especially about the i... | null | null | null | gr-qc astro-ph.CO hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | PBH formation requires high-density regions in the (random) density field
filling the primordial universe. While only the largest (and so rarest)
overdensities collapse to form PBHs, the rest cause large anisotropic stresses,
which are the source of GWs. We provide an overview of the theoretical aspects
of the GW bac... | [
{
"created": "Tue, 27 Feb 2024 10:29:35 GMT",
"version": "v1"
}
] | 2024-02-28 | [
[
"Domènech",
"Guillem",
""
]
] | PBH formation requires high-density regions in the (random) density field filling the primordial universe. While only the largest (and so rarest) overdensities collapse to form PBHs, the rest cause large anisotropic stresses, which are the source of GWs. We provide an overview of the theoretical aspects of the GW backg... |
1706.01328 | Yoshimasa Kurihara | Yoshimasa Kurihara | Characteristic classes in general relativity on a modified Poincare
curvature bundle | 12 pages, no figure | Journal of Mathematical Physics 58 , 092502 (2017) | 10.1063/1.4990708 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Characteristic classes in space-time manifolds are discussed for both even-
and odd-dimensional spacetimes. In particular, it is shown that the
Einstein--Hilbert action is equivalent to a second Chern-class on a modified
Poincare bundle in four dimensions. Consequently, the cosmological constant and
the trace of an e... | [
{
"created": "Thu, 1 Jun 2017 00:15:58 GMT",
"version": "v1"
},
{
"created": "Fri, 9 Jun 2017 06:45:58 GMT",
"version": "v2"
}
] | 2018-07-06 | [
[
"Kurihara",
"Yoshimasa",
""
]
] | Characteristic classes in space-time manifolds are discussed for both even- and odd-dimensional spacetimes. In particular, it is shown that the Einstein--Hilbert action is equivalent to a second Chern-class on a modified Poincare bundle in four dimensions. Consequently, the cosmological constant and the trace of an ene... |
1207.2510 | Jose Wadih Maluf Dr. | J. W. Maluf, S. C. Ulhoa and J. F. da Rocha-Neto | Gravitational waves and the breaking of parallelograms in space-time | 19 pages, 2 figures. The article has been substantially enlarged. We
established a connection between our results and the Fermilab Holometer
experiment. Published by the General Relativity and Gravitation | null | 10.1007/s10714-013-1517-x | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show that plane-fronted gravitational waves induce the breaking of
parallelograms in space-time, in the context of the teleparallel equivalent of
general relativity (TEGR). The breaking of parallelograms can be shown by
considering a thought experiment that consists of a simple physical
configuration, similar to t... | [
{
"created": "Tue, 10 Jul 2012 23:16:43 GMT",
"version": "v1"
},
{
"created": "Wed, 27 Mar 2013 12:09:59 GMT",
"version": "v2"
}
] | 2013-03-28 | [
[
"Maluf",
"J. W.",
""
],
[
"Ulhoa",
"S. C.",
""
],
[
"da Rocha-Neto",
"J. F.",
""
]
] | We show that plane-fronted gravitational waves induce the breaking of parallelograms in space-time, in the context of the teleparallel equivalent of general relativity (TEGR). The breaking of parallelograms can be shown by considering a thought experiment that consists of a simple physical configuration, similar to the... |
gr-qc/0608034 | Pavel Krtous | Pavel Krtous | Electromagnetic field near cosmic string | 12 pages, 8 figures (low-resolution figures; for the version with
high-resolution figures see http://utf.mff.cuni.cz/~krtous/papers/), v2: two
references added, typos corrected | Phys.Rev. D74 (2006) 065006 | 10.1103/PhysRevD.74.065006 | null | gr-qc astro-ph hep-th | null | The retarded Green function of the electromagnetic field in spacetime of a
straight thin cosmic string is found. It splits into a geodesic part
(corresponding to the propagation along null rays) and to the field scattered
on the string. With help of the Green function the electric and magnetic fields
of simple source... | [
{
"created": "Mon, 7 Aug 2006 13:33:53 GMT",
"version": "v1"
},
{
"created": "Fri, 15 Sep 2006 08:17:03 GMT",
"version": "v2"
}
] | 2009-11-11 | [
[
"Krtous",
"Pavel",
""
]
] | The retarded Green function of the electromagnetic field in spacetime of a straight thin cosmic string is found. It splits into a geodesic part (corresponding to the propagation along null rays) and to the field scattered on the string. With help of the Green function the electric and magnetic fields of simple sources ... |
1508.05853 | Eduardo Bittencourt | Mario Novello and Eduardo Bittencourt | Metric Relativity and the Dynamical Bridge: highlights of Riemannian
geometry in physics | 121 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present an overview of recent developments concerning modifications of the
geometry of space-time to describe various physical processes of interactions
among classical and quantum configurations. We concentrate in two main lines of
research: the Metric Relativity and the Dynamical Bridge.
| [
{
"created": "Fri, 21 Aug 2015 10:25:27 GMT",
"version": "v1"
}
] | 2015-08-25 | [
[
"Novello",
"Mario",
""
],
[
"Bittencourt",
"Eduardo",
""
]
] | We present an overview of recent developments concerning modifications of the geometry of space-time to describe various physical processes of interactions among classical and quantum configurations. We concentrate in two main lines of research: the Metric Relativity and the Dynamical Bridge. |
1711.01111 | Miguel Sabido | J. L. Lopez, M. Sabido and C. Yee-Romero | Phase space deformations in phantom cosmology | 6 pages, 2 figures. v2: version to appear in Phys. Dark Univ | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss the physical consequences of making general phase space
deformations on the minisuperspace of phantom cosmology. Based on the principle
of physically equivalent descriptions in the deformed theory, we investigate
for what values of the deformation parameters the arising descriptions are
physically equivale... | [
{
"created": "Fri, 3 Nov 2017 11:38:45 GMT",
"version": "v1"
},
{
"created": "Wed, 10 Jan 2018 10:50:02 GMT",
"version": "v2"
}
] | 2018-01-11 | [
[
"Lopez",
"J. L.",
""
],
[
"Sabido",
"M.",
""
],
[
"Yee-Romero",
"C.",
""
]
] | We discuss the physical consequences of making general phase space deformations on the minisuperspace of phantom cosmology. Based on the principle of physically equivalent descriptions in the deformed theory, we investigate for what values of the deformation parameters the arising descriptions are physically equivalent... |
2005.00602 | Paul Ramond | Paul Ramond, Alexandre Le Tiec | Multipolar Particles in Helically Symmetric Spacetimes | 37 pages, 2 figures | Class. Quantum Grav. 38, 135022 (2021) | 10.1088/1361-6382/abebef | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider a binary system of spinning compact objects with internal
structure, moving along an exactly circular orbit, and modelled within the
multipolar gravitational skeleton formalism, up to quadrupolar order. We prove
that the worldline of each multipolar particle is an integral curve of the
helical Killing vec... | [
{
"created": "Fri, 1 May 2020 20:50:24 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Mar 2021 15:25:48 GMT",
"version": "v2"
}
] | 2022-04-27 | [
[
"Ramond",
"Paul",
""
],
[
"Tiec",
"Alexandre Le",
""
]
] | We consider a binary system of spinning compact objects with internal structure, moving along an exactly circular orbit, and modelled within the multipolar gravitational skeleton formalism, up to quadrupolar order. We prove that the worldline of each multipolar particle is an integral curve of the helical Killing vecto... |
gr-qc/0407067 | Andrei Galiautdinov | Andrei Galiautdinov | Modified Einstein equations | 3 pages, no figures; some changes; typos corrected | null | null | null | gr-qc | null | Standard general relativity fails to take into account the changes in
coordinates induced by the variation of metric in the Hilbert action principle.
We propose to include such changes by introducing a fundamental compensating
tensor field and modifying the usual variational procedure.
| [
{
"created": "Mon, 19 Jul 2004 17:16:11 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Jul 2004 20:30:42 GMT",
"version": "v2"
},
{
"created": "Mon, 26 Jul 2004 16:27:01 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Galiautdinov",
"Andrei",
""
]
] | Standard general relativity fails to take into account the changes in coordinates induced by the variation of metric in the Hilbert action principle. We propose to include such changes by introducing a fundamental compensating tensor field and modifying the usual variational procedure. |
gr-qc/0407023 | Jean-Paul Mbelek | J.P. Mbelek | General relativity and quintessence explain the Pioneer anomaly | 14 pages, no figure | null | null | null | gr-qc astro-ph physics.space-ph | null | The anomalous time depending blueshift, the so-called "Pioneer anomaly", that
was detected in the radio-metric data from Pioneer 10/11, Ulysses and Galileo
spacecraft may not result from a real change of velocity. Rather, the Pioneer
anomaly may be understood within the framework of general relativity as a time
depen... | [
{
"created": "Tue, 6 Jul 2004 17:16:32 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Mbelek",
"J. P.",
""
]
] | The anomalous time depending blueshift, the so-called "Pioneer anomaly", that was detected in the radio-metric data from Pioneer 10/11, Ulysses and Galileo spacecraft may not result from a real change of velocity. Rather, the Pioneer anomaly may be understood within the framework of general relativity as a time dependi... |
1010.1383 | Tomas Ortin | Tomas Ortin | Supersymmetric solutions of 4-dimensional supergravities | Latex2e, 14 pages. Contribution to the Proceedings of the IV Mexican
Meeting in Mathematical and Experimental Physics held at El Colegio Nacional,
M\'exico DF. July 19th to 23rd, 2010 | null | 10.1063/1.3531629 | IFT-UAM/CSIC-10-52 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review some general and recent results on the characterization and
construction of timelike supersymmetric solutions of 4-dimensional supergravity
theories.
| [
{
"created": "Thu, 7 Oct 2010 10:03:43 GMT",
"version": "v1"
}
] | 2015-05-20 | [
[
"Ortin",
"Tomas",
""
]
] | We review some general and recent results on the characterization and construction of timelike supersymmetric solutions of 4-dimensional supergravity theories. |
1507.04703 | Ivan Agullo | Ivan Agullo | Loop quantum cosmology, non-Gaussianity, and CMB power asymmetry | 7 pages, 3 figure | Phys. Rev. D 92, 064038 (2015) | 10.1103/PhysRevD.92.064038 | LSU-REL-071615 | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We argue that the anomalous power asymmetry observed in the cosmic microwave
background (CMB) may have originated in a cosmic bounce preceding inflation. In
loop quantum cosmology (LQC) the big bang singularity is generically replaced
by a bounce due to quantum gravitational effects. We compute the spectrum of
inflat... | [
{
"created": "Thu, 16 Jul 2015 18:59:14 GMT",
"version": "v1"
}
] | 2015-09-30 | [
[
"Agullo",
"Ivan",
""
]
] | We argue that the anomalous power asymmetry observed in the cosmic microwave background (CMB) may have originated in a cosmic bounce preceding inflation. In loop quantum cosmology (LQC) the big bang singularity is generically replaced by a bounce due to quantum gravitational effects. We compute the spectrum of inflatio... |
1811.08864 | Nasr Ahmed | Nasr Ahmed and Sultan Z. Alamri | A stable flat entropy-corrected FRW universe | 17 pages, 18 figures | null | 10.1142/S0219887819501597 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, a general entropy-corrected FRW cosmological model has been
presented in which a deceleration-to-acceleration transition occurs according
to recent observations. We found that the case for the flat universe ($k=0$),
supported by observations, is the most stable one where it successfully passes
all stab... | [
{
"created": "Wed, 21 Nov 2018 18:19:57 GMT",
"version": "v1"
},
{
"created": "Thu, 8 Aug 2019 17:40:07 GMT",
"version": "v2"
}
] | 2019-10-23 | [
[
"Ahmed",
"Nasr",
""
],
[
"Alamri",
"Sultan Z.",
""
]
] | In this paper, a general entropy-corrected FRW cosmological model has been presented in which a deceleration-to-acceleration transition occurs according to recent observations. We found that the case for the flat universe ($k=0$), supported by observations, is the most stable one where it successfully passes all stabil... |
1209.2317 | Michael Stone | Michael Stone | An analogue of Hawking radiation in the quantum Hall effect | 16 pages, five figures | Class. Quantum Grav. 30 085003 (2013) | 10.1088/0264-9381/30/8/085003 | null | gr-qc cond-mat.mes-hall | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We use the identification of the edge mode of the filling fraction $\nu=1$
quantum Hall phase with a 1+1 dimensional chiral Dirac fermion to construct an
analogue model for a chiral fermion in a space-time geometry possessing an
event horizon. By solving the model in the lowest Landau level, we show that
the event ho... | [
{
"created": "Tue, 11 Sep 2012 13:38:06 GMT",
"version": "v1"
}
] | 2013-08-22 | [
[
"Stone",
"Michael",
""
]
] | We use the identification of the edge mode of the filling fraction $\nu=1$ quantum Hall phase with a 1+1 dimensional chiral Dirac fermion to construct an analogue model for a chiral fermion in a space-time geometry possessing an event horizon. By solving the model in the lowest Landau level, we show that the event hori... |
2112.12518 | Jitendra Kumar Dr. | Jitendra Kumar and Puja Bharti | The classification of interior solutions of anisotropic fluid
configurations | null | null | null | null | gr-qc astro-ph.HE astro-ph.SR | http://creativecommons.org/licenses/by/4.0/ | The Einstein-Maxwell (or Einstein) system of field equations plays a
substantial role in the modeling of compact stars. Although due to its
non-linearity getting an exact solution for the system of field equations is a
difficult task, the solutions of field equations have a long and rich history.
It took a year for K... | [
{
"created": "Wed, 22 Dec 2021 06:34:21 GMT",
"version": "v1"
},
{
"created": "Tue, 25 Jan 2022 09:10:58 GMT",
"version": "v2"
}
] | 2022-01-26 | [
[
"Kumar",
"Jitendra",
""
],
[
"Bharti",
"Puja",
""
]
] | The Einstein-Maxwell (or Einstein) system of field equations plays a substantial role in the modeling of compact stars. Although due to its non-linearity getting an exact solution for the system of field equations is a difficult task, the solutions of field equations have a long and rich history. It took a year for Kar... |
gr-qc/9703051 | Haret Rosu | B. Roy Frieden, H.C. Rosu | Fisher's arrow of `time' in cosmological coherent phase space | 10 pages, LaTex, Honorable Mention at GRF-1997 | Mod.Phys.Lett. A13 (1998) 39-46 | 10.1142/S0217732398000073 | null | gr-qc | null | Fisher's arrow of `time' in a cosmological phase space defined as in quantum
optics (i.e., whose points are coherent states) is introduced as follows.
Assuming that the phase space evolution of the universe starts from an initial
squeezed cosmological state towards a final thermal one, a Fokker-Planck
equation for th... | [
{
"created": "Wed, 19 Mar 1997 21:22:47 GMT",
"version": "v1"
},
{
"created": "Wed, 21 May 1997 17:37:01 GMT",
"version": "v2"
},
{
"created": "Thu, 18 Dec 1997 14:48:44 GMT",
"version": "v3"
},
{
"created": "Sat, 7 Feb 1998 19:58:15 GMT",
"version": "v4"
}
] | 2009-10-30 | [
[
"Frieden",
"B. Roy",
""
],
[
"Rosu",
"H. C.",
""
]
] | Fisher's arrow of `time' in a cosmological phase space defined as in quantum optics (i.e., whose points are coherent states) is introduced as follows. Assuming that the phase space evolution of the universe starts from an initial squeezed cosmological state towards a final thermal one, a Fokker-Planck equation for the ... |
gr-qc/9808026 | Gian Paolo Vacca | G.L. Alberghi, R. Casadio, G.P. Vacca, G. Venturi | Gravitational Collapse of a Shell of Quantized Matter | 20 pages, 1 eps figure. Problem with figure fixed | Class.Quant.Grav.16:131-147,1999 | 10.1088/0264-9381/16/1/010 | null | gr-qc astro-ph hep-ph | null | The semi-classical collapse, including lowest order back-reaction, of a thin
shell of self-gravitating quantized matter is illustrated. The conditions for
which self-gravitating matter forms a thin shell are first discussed and an
effective Lagrangian for such matter is obtained. The matter-gravity system is
then qua... | [
{
"created": "Mon, 10 Aug 1998 12:22:53 GMT",
"version": "v1"
},
{
"created": "Tue, 11 Aug 1998 09:56:31 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Alberghi",
"G. L.",
""
],
[
"Casadio",
"R.",
""
],
[
"Vacca",
"G. P.",
""
],
[
"Venturi",
"G.",
""
]
] | The semi-classical collapse, including lowest order back-reaction, of a thin shell of self-gravitating quantized matter is illustrated. The conditions for which self-gravitating matter forms a thin shell are first discussed and an effective Lagrangian for such matter is obtained. The matter-gravity system is then quant... |
1910.03298 | Ilya Peshkov M. | Evgeniy Romenski and Ilya Peshkov and Michael Dumbser and and
Francesco Fambri | A new continuum model for general relativistic viscous heat-conducting
media | Accepted for publication in Phil. Trans. R. Soc. A. (before author
proofs) 21 pages, 1 figure | null | 10.1098/rsta.2019.0175 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The lack of formulation of macroscopic equations for irreversible dynamics of
viscous heat-conducting media compatible with the causality principle of
Einstein's Special Relativity and the Euler-Lagrange structure of General
Relativity is a long-lasting problem. In this paper, we propose a possible
solution to this p... | [
{
"created": "Tue, 8 Oct 2019 09:38:07 GMT",
"version": "v1"
},
{
"created": "Sat, 8 Feb 2020 12:18:31 GMT",
"version": "v2"
}
] | 2020-03-31 | [
[
"Romenski",
"Evgeniy",
""
],
[
"Peshkov",
"Ilya",
""
],
[
"Dumbser",
"Michael",
""
],
[
"Fambri",
"and Francesco",
""
]
] | The lack of formulation of macroscopic equations for irreversible dynamics of viscous heat-conducting media compatible with the causality principle of Einstein's Special Relativity and the Euler-Lagrange structure of General Relativity is a long-lasting problem. In this paper, we propose a possible solution to this pro... |
1712.03066 | Simpliciano Castardelli Reis | Simpliciano Castardelli dos Reis and Ilya L.Shapiro | Cosmic anisotropy with Reduced Relativistic Gas | 18 pages, 4 figures. Added small Appendix and a few extra references,
slightly extended discussion on the possible application of the results.
Version accepted in European Journal of Physics C, with LaTeX format modified
accordingly | Eur.Phys.J. C78 (2018) no.2, 145 | 10.1140/epjc/s10052-018-5618-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The dynamics of cosmological anisotropies is investigated for Bianchi type I
universe filled by a relativistic matter represented by the reduced
relativistic gas model (RRG), with equation of state interpolating between
radiation and matter. Previously it was shown that the interpolation is
observed in the background... | [
{
"created": "Fri, 8 Dec 2017 14:01:19 GMT",
"version": "v1"
},
{
"created": "Wed, 7 Feb 2018 00:18:56 GMT",
"version": "v2"
}
] | 2019-08-20 | [
[
"Reis",
"Simpliciano Castardelli dos",
""
],
[
"Shapiro",
"Ilya L.",
""
]
] | The dynamics of cosmological anisotropies is investigated for Bianchi type I universe filled by a relativistic matter represented by the reduced relativistic gas model (RRG), with equation of state interpolating between radiation and matter. Previously it was shown that the interpolation is observed in the background c... |
1204.2177 | Christian Fr{\o}nsdal | Christian Fronsdal, Thomas J. Wilcox | An equation of state for dark matter in the Milky Way | 19 pages, 5 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Dark matter, believed to be present in many galaxies, is interpreted as a
hydrodynamical system in interaction with the gravitational field and with
nothing else. The gravitational field of our Galaxy can be inferred from
observation of orbital velocities of the visible stars, in a first
approximation in which the fi... | [
{
"created": "Sun, 8 Apr 2012 21:56:13 GMT",
"version": "v1"
}
] | 2012-04-11 | [
[
"Fronsdal",
"Christian",
""
],
[
"Wilcox",
"Thomas J.",
""
]
] | Dark matter, believed to be present in many galaxies, is interpreted as a hydrodynamical system in interaction with the gravitational field and with nothing else. The gravitational field of our Galaxy can be inferred from observation of orbital velocities of the visible stars, in a first approximation in which the fiel... |
2304.06895 | Yu-Xiao Liu | Sen Yang, Wen-Di Guo, Qin Tan, Yu-Xiao Liu | Axial gravitational quasinormal modes of a self-dual black hole in loop
quantum gravity | 14 pages, 3 figures, 5 tables | Phys.Rev.D 108 (2023) 2, 024055 | 10.1103/PhysRevD.108.024055 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the axial gravitational quasinormal modes of a self-dual black hole
in loop quantum gravity. Considering the axial perturbation of the background
spacetime, we obtain the Schr\"{o}dinger-like master equation. Then we
calculate the quasinormal frequencies with the Wentzel-Kramers-Brillouin
approximation and t... | [
{
"created": "Fri, 14 Apr 2023 02:09:14 GMT",
"version": "v1"
},
{
"created": "Fri, 5 May 2023 14:34:02 GMT",
"version": "v2"
}
] | 2024-02-21 | [
[
"Yang",
"Sen",
""
],
[
"Guo",
"Wen-Di",
""
],
[
"Tan",
"Qin",
""
],
[
"Liu",
"Yu-Xiao",
""
]
] | We study the axial gravitational quasinormal modes of a self-dual black hole in loop quantum gravity. Considering the axial perturbation of the background spacetime, we obtain the Schr\"{o}dinger-like master equation. Then we calculate the quasinormal frequencies with the Wentzel-Kramers-Brillouin approximation and the... |
1504.08226 | Jonas Mureika | Jonas R. Mureika, John W. Moffat, Mir Faizal | Black Hole Thermodynamics in MOdified Gravity (MOG) | Title changed slightly; new section on BH entropy corrections added;
matches version published in PLB | Phys. Lett. B 757, 528 (2016) | 10.1016/j.physletb.2016.04.041 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the thermodynamical properties of black holes in a modified theory
of gravity, which was initially proposed to obtain correct dynamics of galaxies
and galaxy clusters without dark matter. The thermodynamics of non-rotating and
rotating black hole solutions resembles similar solutions in Einstein-Maxwell
th... | [
{
"created": "Tue, 3 Mar 2015 19:09:53 GMT",
"version": "v1"
},
{
"created": "Mon, 16 May 2016 18:33:05 GMT",
"version": "v2"
}
] | 2016-05-20 | [
[
"Mureika",
"Jonas R.",
""
],
[
"Moffat",
"John W.",
""
],
[
"Faizal",
"Mir",
""
]
] | We analyze the thermodynamical properties of black holes in a modified theory of gravity, which was initially proposed to obtain correct dynamics of galaxies and galaxy clusters without dark matter. The thermodynamics of non-rotating and rotating black hole solutions resembles similar solutions in Einstein-Maxwell theo... |
gr-qc/9712001 | James Hartle | James B. Hartle (University of California, Santa Barbara) | Quantum Pasts and the Utility of History | 22pages, uses REVTEX 3.0 | Phys.Scripta T76 (1998) 67 | 10.1238/Physica.Topical.076a00067 | null | gr-qc quant-ph | null | From data in the present we can predict the future and retrodict the past.
These predictions and retrodictions are for histories -- most simply time
sequences of events. Quantum mechanics gives probabilities for individual
histories in a decoherent set of alternative histories. This paper discusses
several issues con... | [
{
"created": "Tue, 2 Dec 1997 00:46:12 GMT",
"version": "v1"
}
] | 2014-01-15 | [
[
"Hartle",
"James B.",
"",
"University of California, Santa Barbara"
]
] | From data in the present we can predict the future and retrodict the past. These predictions and retrodictions are for histories -- most simply time sequences of events. Quantum mechanics gives probabilities for individual histories in a decoherent set of alternative histories. This paper discusses several issues conne... |
1510.07490 | Sunil Maharaj | Naresh Dadhich, Sudan Hansraj, Sunil D. Maharaj | Universality of isothermal fluid spheres in Lovelock gravity | 11 pages | Phys. Rev. D 93, 044072 (2016) | 10.1103/PhysRevD.93.044072 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show universality of isothermal fluid spheres in pure Lovelock gravity
where the equation of motion has only one $N$th order term coming from the
corresponding Lovelock polynomial action of degree $N$. Isothermality is
characterized by the equation of state, $p = \alpha \rho$ and the property,
$\rho \sim 1/r^{2N}$... | [
{
"created": "Mon, 26 Oct 2015 14:26:21 GMT",
"version": "v1"
}
] | 2016-03-09 | [
[
"Dadhich",
"Naresh",
""
],
[
"Hansraj",
"Sudan",
""
],
[
"Maharaj",
"Sunil D.",
""
]
] | We show universality of isothermal fluid spheres in pure Lovelock gravity where the equation of motion has only one $N$th order term coming from the corresponding Lovelock polynomial action of degree $N$. Isothermality is characterized by the equation of state, $p = \alpha \rho$ and the property, $\rho \sim 1/r^{2N}$. ... |
2106.05062 | Deepen Garg | Deepen Garg and I. Y. Dodin | Gauge-invariant gravitational waves in matter beyond linearized gravity | null | Class. Quantum Grav. 40 215002 (2023) | 10.1088/1361-6382/acfc0e | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Modeling the propagation of gravitational waves (GWs) through matter is
complicated by the gauge freedom of linearized gravity in that once
nonlinearities are taken into consideration, gauge artifacts can cause spurious
acceleration of the matter. To eliminate these artifacts, we propose how to
keep the theory of dis... | [
{
"created": "Wed, 9 Jun 2021 13:32:56 GMT",
"version": "v1"
},
{
"created": "Sun, 25 Dec 2022 13:52:05 GMT",
"version": "v2"
},
{
"created": "Mon, 11 Sep 2023 22:05:20 GMT",
"version": "v3"
}
] | 2024-02-28 | [
[
"Garg",
"Deepen",
""
],
[
"Dodin",
"I. Y.",
""
]
] | Modeling the propagation of gravitational waves (GWs) through matter is complicated by the gauge freedom of linearized gravity in that once nonlinearities are taken into consideration, gauge artifacts can cause spurious acceleration of the matter. To eliminate these artifacts, we propose how to keep the theory of dispe... |
0809.4076 | Vladimir Dzhunushaliev | Vladimir Dzhunushaliev, Vladimir Folomeev and Masato Minamitsuji | Thick de Sitter brane solutions in higher dimensions | typos corrected | Phys.Rev.D79:024001,2009 | 10.1103/PhysRevD.79.024001 | null | gr-qc astro-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present thick de Sitter brane solutions which are supported by two
interacting {\it phantom} scalar fields in five-, six- and seven-dimensional
spacetime. It is shown that for all cases regular solutions with anti-de Sitter
asymptotic (5D problem) and a flat asymptotic far from the brane (6D and 7D
cases) exist. W... | [
{
"created": "Wed, 24 Sep 2008 03:38:49 GMT",
"version": "v1"
},
{
"created": "Thu, 23 Oct 2008 04:55:40 GMT",
"version": "v2"
},
{
"created": "Mon, 5 Jan 2009 07:48:14 GMT",
"version": "v3"
}
] | 2009-01-22 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
],
[
"Minamitsuji",
"Masato",
""
]
] | We present thick de Sitter brane solutions which are supported by two interacting {\it phantom} scalar fields in five-, six- and seven-dimensional spacetime. It is shown that for all cases regular solutions with anti-de Sitter asymptotic (5D problem) and a flat asymptotic far from the brane (6D and 7D cases) exist. We ... |
gr-qc/9701041 | Roberto De Pietri | Roberto De Pietri (University of Parma) | Spin Networks and Recoupling in Loop Quantum Gravity | 8 pages, LaTeX3e, To appear in the Proceedings of the 2nd Conference
on Constrained Dynamics and Quantum Gravity, Santa Margherita, Italy, 17-21
September 1996 | Nucl.Phys.Proc.Suppl. 57 (1997) 251-254 | 10.1016/S0920-5632(97)00397-6 | University of Parma UPRF-97-01 | gr-qc | null | I discuss the role played by the spin-network basis and recoupling theory (in
its graphical tangle-theoretic formulation) and their use for performing
explicit calculations in loop quantum gravity. In particular, I show that
recoupling theory allows the derivation of explicit expressions for the
eingenvalues of the q... | [
{
"created": "Sat, 18 Jan 1997 12:53:33 GMT",
"version": "v1"
}
] | 2009-10-30 | [
[
"De Pietri",
"Roberto",
"",
"University of Parma"
]
] | I discuss the role played by the spin-network basis and recoupling theory (in its graphical tangle-theoretic formulation) and their use for performing explicit calculations in loop quantum gravity. In particular, I show that recoupling theory allows the derivation of explicit expressions for the eingenvalues of the qua... |
1106.6036 | Bahram Mashhoon | B. Mashhoon and P. S. Wesson | Mach's Principle and Higher-Dimensional Dynamics | 16 pages, accepted for publication in Annalen der Physik; Revised
Version: minor improvements | Annalen Phys.524:63-70,2012 | 10.1002/andp.201100100 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We briefly discuss the current status of Mach's principle in general
relativity and point out that its last vestige, namely, the gravitomagnetic
field associated with rotation, has recently been measured for the earth in the
GP-B experiment. Furthermore, in his analysis of the foundations of Newtonian
mechanics, Mach... | [
{
"created": "Wed, 29 Jun 2011 19:42:50 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Dec 2011 20:43:05 GMT",
"version": "v2"
},
{
"created": "Fri, 16 Dec 2011 19:50:42 GMT",
"version": "v3"
}
] | 2015-05-28 | [
[
"Mashhoon",
"B.",
""
],
[
"Wesson",
"P. S.",
""
]
] | We briefly discuss the current status of Mach's principle in general relativity and point out that its last vestige, namely, the gravitomagnetic field associated with rotation, has recently been measured for the earth in the GP-B experiment. Furthermore, in his analysis of the foundations of Newtonian mechanics, Mach p... |
gr-qc/0212074 | Martinetti | P. Martinetti, C. Rovelli | Diamonds's Temperature: Unruh effect for bounded trajectories and
thermal time hypothesis | One reference corrected | Class.Quant.Grav. 20 (2003) 4919-4932 | 10.1088/0264-9381/20/22/015 | null | gr-qc hep-th math-ph math.MP | null | We study the Unruh effect for an observer with a finite lifetime, using the
thermal time hypothesis. The thermal time hypothesis maintains that: (i) time
is the physical quantity determined by the flow defined by a state over an
observable algebra, and (ii) when this flow is proportional to a geometric flow
in spacet... | [
{
"created": "Tue, 17 Dec 2002 19:57:23 GMT",
"version": "v1"
},
{
"created": "Mon, 3 Mar 2003 18:04:30 GMT",
"version": "v2"
},
{
"created": "Wed, 28 Jan 2004 21:22:49 GMT",
"version": "v3"
},
{
"created": "Mon, 2 Feb 2004 12:21:48 GMT",
"version": "v4"
}
] | 2009-11-07 | [
[
"Martinetti",
"P.",
""
],
[
"Rovelli",
"C.",
""
]
] | We study the Unruh effect for an observer with a finite lifetime, using the thermal time hypothesis. The thermal time hypothesis maintains that: (i) time is the physical quantity determined by the flow defined by a state over an observable algebra, and (ii) when this flow is proportional to a geometric flow in spacetim... |
2105.09192 | Hamid Reza Sepangi | Mohaddese Heydari-Fard, Malihe Heydari-Fard, Hamid Reza Sepangi | Thin accretion disks around rotating black holes in $4D$
Einstein-Gauss-Bonnet gravity | 18 pages, 8 figures, to appear in EPJC | EPJC (2021) 81:473 | 10.1140/epjc/s10052-021-09266-7 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recently, Kumar and Ghosh have derived Kerr-like rotating black hole
solutions in the framework of four-dimensional Einstein-Gauss-Bonnet theory of
gravity and investigated the black hole shadow. Using the steady-state
Novikov-Thorne model, we study thin accretion disk processes for such rotating
black holes includin... | [
{
"created": "Wed, 19 May 2021 15:11:10 GMT",
"version": "v1"
}
] | 2021-06-16 | [
[
"Heydari-Fard",
"Mohaddese",
""
],
[
"Heydari-Fard",
"Malihe",
""
],
[
"Sepangi",
"Hamid Reza",
""
]
] | Recently, Kumar and Ghosh have derived Kerr-like rotating black hole solutions in the framework of four-dimensional Einstein-Gauss-Bonnet theory of gravity and investigated the black hole shadow. Using the steady-state Novikov-Thorne model, we study thin accretion disk processes for such rotating black holes including ... |
1608.08656 | Andrei Lebed G | Andrei G. Lebed | Breakdown of the Equivalence between Gravitational Mass and Energy for a
Quantum Body: Theory and Suggested Experiments | Review: 15 pages, no figures | International Journal of Modern Physics D, vol. 24, 1530027 (2015) | 10.1142/S021827181530027X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review recent theoretical results, obtained for the equivalence between
gravitational mass and energy of a composite quantum body as well as for its
breakdown at macroscopic and microscopic levels. In particular, we discuss that
the expectation values of passive and active gravitational masses operators are
equiva... | [
{
"created": "Tue, 30 Aug 2016 20:53:59 GMT",
"version": "v1"
}
] | 2016-09-07 | [
[
"Lebed",
"Andrei G.",
""
]
] | We review recent theoretical results, obtained for the equivalence between gravitational mass and energy of a composite quantum body as well as for its breakdown at macroscopic and microscopic levels. In particular, we discuss that the expectation values of passive and active gravitational masses operators are equivale... |
gr-qc/0207108 | J. Ponce de Leon | J. Ponce de Leon | Mass and Charge in Brane-World and Non-Compact Kaluza-Klein Theories in
5 Dim | V2: References added, discussion extended. V3 is identical to V2,
references updated. To appear in General Relativity and Gravitation | Gen.Rel.Grav. 35 (2003) 1365-1384 | 10.1023/A:1024526400349 | null | gr-qc | null | In classical Kaluza-Klein theory, with compactified extra dimensions and
without scalar field, the rest mass as well as the electric charge of test
particles are constants of motion. We show that in the case of a large extra
dimension this is no longer so. We propose the Hamilton-Jacobi formalism,
instead of the geod... | [
{
"created": "Sun, 28 Jul 2002 09:25:14 GMT",
"version": "v1"
},
{
"created": "Mon, 23 Sep 2002 12:42:52 GMT",
"version": "v2"
},
{
"created": "Fri, 9 May 2003 07:05:47 GMT",
"version": "v3"
}
] | 2015-06-25 | [
[
"de Leon",
"J. Ponce",
""
]
] | In classical Kaluza-Klein theory, with compactified extra dimensions and without scalar field, the rest mass as well as the electric charge of test particles are constants of motion. We show that in the case of a large extra dimension this is no longer so. We propose the Hamilton-Jacobi formalism, instead of the geodes... |
1911.07520 | Hrishikesh Chakrabarty | Kimet Jusufi, Mubasher Jamil, Hrishikesh Chakrabarty, Qiang Wu, Cosimo
Bambi and Anzhong Wang | Rotating regular black holes in conformal massive gravity | 17 pages, 28 figures, Accepted for Publication (Phys.Rev.D) | Phys. Rev. D 101, 044035 (2020) | 10.1103/PhysRevD.101.044035 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we use a suitable conformal rescaling to construct static and
rotating regular black holes in conformal massive gravity. The new metric is
characterized by the mass $M$, the "scalar charge" $Q$, the angular momentum
parameter $a$, the "hair parameter" $\lambda$, and the conformal scale factor
encoded i... | [
{
"created": "Mon, 18 Nov 2019 10:07:08 GMT",
"version": "v1"
},
{
"created": "Thu, 30 Jan 2020 13:54:17 GMT",
"version": "v2"
}
] | 2020-02-18 | [
[
"Jusufi",
"Kimet",
""
],
[
"Jamil",
"Mubasher",
""
],
[
"Chakrabarty",
"Hrishikesh",
""
],
[
"Wu",
"Qiang",
""
],
[
"Bambi",
"Cosimo",
""
],
[
"Wang",
"Anzhong",
""
]
] | In this paper, we use a suitable conformal rescaling to construct static and rotating regular black holes in conformal massive gravity. The new metric is characterized by the mass $M$, the "scalar charge" $Q$, the angular momentum parameter $a$, the "hair parameter" $\lambda$, and the conformal scale factor encoded in ... |
2007.16139 | Jean-Philippe Nicolas | Dietrich H\"afner, Mokdad Mokdad, Jean-Philippe Nicolas | Scattering theory for Dirac fields inside a Reissner-Nordstr\"om-type
black hole | 18 pages, 1 figure | J. Math. Phys. 62, 081503 (2021) | 10.1063/5.0055920 | null | gr-qc math.AP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We show asymptotic completeness for the massive charged Dirac equation
between the black hole and Cauchy horizons of a sub-extremal ((Anti-) De
Sitter) Reissner-Nordstr\"om black hole.
| [
{
"created": "Fri, 31 Jul 2020 15:38:05 GMT",
"version": "v1"
}
] | 2022-04-14 | [
[
"Häfner",
"Dietrich",
""
],
[
"Mokdad",
"Mokdad",
""
],
[
"Nicolas",
"Jean-Philippe",
""
]
] | We show asymptotic completeness for the massive charged Dirac equation between the black hole and Cauchy horizons of a sub-extremal ((Anti-) De Sitter) Reissner-Nordstr\"om black hole. |
2311.16085 | Marine Prunier Mrs | Marine Prunier, Gonzalo Morr\'as, Jos\'e Francisco Nu\~no Siles,
Sebastien Clesse, Juan Garc\'ia-Bellido and Ester Ruiz Morales | Analysis of the subsolar-mass black hole candidate SSM200308 from the
second part of the third observing run of Advanced LIGO-Virgo | 7 pages, 4 figures, comments welcome | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A follow-up of a subsolar black hole candidate identified in the second part
of the third observing run of the LIGO-Virgo-KAGRA collaboration is carried
out. With a search signal-to-noise ratio of $8.90$ and a false-alarm rate of 1
per 5 years, close to the usual thresholds for claiming a gravitational-wave
event, we... | [
{
"created": "Mon, 27 Nov 2023 18:54:18 GMT",
"version": "v1"
}
] | 2023-11-28 | [
[
"Prunier",
"Marine",
""
],
[
"Morrás",
"Gonzalo",
""
],
[
"Siles",
"José Francisco Nuño",
""
],
[
"Clesse",
"Sebastien",
""
],
[
"García-Bellido",
"Juan",
""
],
[
"Morales",
"Ester Ruiz",
""
]
] | A follow-up of a subsolar black hole candidate identified in the second part of the third observing run of the LIGO-Virgo-KAGRA collaboration is carried out. With a search signal-to-noise ratio of $8.90$ and a false-alarm rate of 1 per 5 years, close to the usual thresholds for claiming a gravitational-wave event, we c... |
1207.2504 | Steven Carlip | S. Carlip | Challenges for Emergent Gravity | 18 pages; v2: added discussion of TDiff invariance, emergence of
diffeomorphism invariance, and more references | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The idea of gravity as an "emergent" phenomenon has gained popularity in
recent years. I discuss some of the obstacles that any such model must overcome
in order to agree with the observational underpinnings of general relativity.
| [
{
"created": "Tue, 10 Jul 2012 22:35:23 GMT",
"version": "v1"
},
{
"created": "Thu, 19 Jul 2012 23:04:42 GMT",
"version": "v2"
}
] | 2012-07-23 | [
[
"Carlip",
"S.",
""
]
] | The idea of gravity as an "emergent" phenomenon has gained popularity in recent years. I discuss some of the obstacles that any such model must overcome in order to agree with the observational underpinnings of general relativity. |
2304.12640 | Jose Luis Hernandez-Pastora | J.L. Hern\'andez-Pastora and L. Herrera | Non-spherical sources of Schwarzschild space-time | 16 pages, 4 figures, to appear in EPJC | Eur. Phys. J. C (2023) 83:375 | 10.1140/epjc/s10052-023-11552-5 | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | While it is known that any spherical fluid distribution may only source the
spherically symmetric Schwarzschild space-time, the inverse is not true. Thus,
in this manuscript, we find exact axially symmetric and static fluid (interior)
solutions to Einstein equations, which match smoothly on the boundary surface
to th... | [
{
"created": "Tue, 25 Apr 2023 08:11:59 GMT",
"version": "v1"
}
] | 2023-05-09 | [
[
"Hernández-Pastora",
"J. L.",
""
],
[
"Herrera",
"L.",
""
]
] | While it is known that any spherical fluid distribution may only source the spherically symmetric Schwarzschild space-time, the inverse is not true. Thus, in this manuscript, we find exact axially symmetric and static fluid (interior) solutions to Einstein equations, which match smoothly on the boundary surface to the ... |
1809.07781 | Cormac Breen | Cormac Breen, Peter Taylor | Vacuum polarization for varying quantum scalar field parameters in
Schwarzschild-anti-de Sitter spacetime | 15 pages, 9 figures | Phys. Rev. D 98, 105006 (2018) | 10.1103/PhysRevD.98.105006 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Equipped with new powerful and efficient methods for computing quantum
expectation values in static-spherically symmetric spacetimes in arbitrary
dimensions, we perform an in-depth investigation of how the quantum vacuum
polarization varies with the parameters in the theory. In particular, we
compute and compare the ... | [
{
"created": "Thu, 20 Sep 2018 18:01:00 GMT",
"version": "v1"
}
] | 2018-11-21 | [
[
"Breen",
"Cormac",
""
],
[
"Taylor",
"Peter",
""
]
] | Equipped with new powerful and efficient methods for computing quantum expectation values in static-spherically symmetric spacetimes in arbitrary dimensions, we perform an in-depth investigation of how the quantum vacuum polarization varies with the parameters in the theory. In particular, we compute and compare the va... |
2112.09589 | Peter Horvathy | P.-M. Zhang, Q.-L. Zhao, P. A. Horvathy | Gravitational Waves and Conformal Time Transformations | Reorganised and refined. Title shortened. 27 pages, 4 double figures.
The Conclusion expanded with an Outlook for further research and additional
references . Accepted for publication in Ann. Phys. (N.Y.) | null | 10.1016/j.aop.2022.168833 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Recent interest in the "memory effect" prompted us to revisit the relation of
gravitational aves and oscillators. 50 years ago Niederer [1] found that an
isotropic harmonic oscillator with a constant frequency can be mapped onto a
free particle. Later Takagi [2] has shown that "time-dependent scaling" extends
the osc... | [
{
"created": "Fri, 17 Dec 2021 16:03:10 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jan 2022 16:04:48 GMT",
"version": "v2"
},
{
"created": "Mon, 14 Feb 2022 08:23:25 GMT",
"version": "v3"
},
{
"created": "Fri, 11 Mar 2022 17:33:34 GMT",
"version": "v4"
}
] | 2022-05-04 | [
[
"Zhang",
"P. -M.",
""
],
[
"Zhao",
"Q. -L.",
""
],
[
"Horvathy",
"P. A.",
""
]
] | Recent interest in the "memory effect" prompted us to revisit the relation of gravitational aves and oscillators. 50 years ago Niederer [1] found that an isotropic harmonic oscillator with a constant frequency can be mapped onto a free particle. Later Takagi [2] has shown that "time-dependent scaling" extends the oscil... |
2007.03401 | Yujie Tan | Cheng-Gang Qin, Yu-Jie Tan, Ya-Fen Chen, and Cheng-Gang Shao | Light propagation in the field of the N-body system and the application
in the TianQin mission | null | null | 10.1103/PhysRevD.100.064063 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Given the high-precision modern space mission, a precise relativistic
modeling of observations is required. By solving the eikonal equation with the
post-Newtonian approximation, the light propagation is determined by the
iterative method in the gravitational field of an isolated, gravitationally
bound N-body system.... | [
{
"created": "Tue, 7 Jul 2020 13:10:07 GMT",
"version": "v1"
}
] | 2020-07-08 | [
[
"Qin",
"Cheng-Gang",
""
],
[
"Tan",
"Yu-Jie",
""
],
[
"Chen",
"Ya-Fen",
""
],
[
"Shao",
"Cheng-Gang",
""
]
] | Given the high-precision modern space mission, a precise relativistic modeling of observations is required. By solving the eikonal equation with the post-Newtonian approximation, the light propagation is determined by the iterative method in the gravitational field of an isolated, gravitationally bound N-body system. D... |
0902.2304 | Supratik Pal Dr | Sudipta Das, Subir Ghosh, Jan-Willem van Holten, Supratik Pal | Generalized particle dynamics: modifying the motion of particles and
branes | 17 pages, 2 figures. Minor revisions. To appear in JHEP | JHEP 0904:115,2009; Erratum-ibid.1103:118,2011 | 10.1088/1126-6708/2009/04/115 10.1007/JHEP03(2011)118 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a generalized dynamics for particles moving in a symmetric
space-time, i.e. a space-time admitting one or more Killing vectors. The
generalization implies that the effective mass of particles becomes dynamical.
We apply this generalized dynamics to the motion of test particles in a static,
spherically sy... | [
{
"created": "Fri, 13 Feb 2009 12:46:32 GMT",
"version": "v1"
},
{
"created": "Fri, 24 Apr 2009 11:47:03 GMT",
"version": "v2"
}
] | 2011-03-31 | [
[
"Das",
"Sudipta",
""
],
[
"Ghosh",
"Subir",
""
],
[
"van Holten",
"Jan-Willem",
""
],
[
"Pal",
"Supratik",
""
]
] | We construct a generalized dynamics for particles moving in a symmetric space-time, i.e. a space-time admitting one or more Killing vectors. The generalization implies that the effective mass of particles becomes dynamical. We apply this generalized dynamics to the motion of test particles in a static, spherically symm... |
1103.2149 | Priscilla Canizares | Priscilla Canizares and Carlos F. Sopuerta | Time-domain modelling of Extreme-Mass-Ratio Inspirals for the Laser
Interferometer Space Antenna | 4 pages, 2 figures, JPCS latex style. Submitted to JPCS (special
issue for the proceedings of the Spanish Relativity Meeting (ERE2010)) | J.Phys.Conf.Ser.314:012075,2011 | 10.1088/1742-6596/314/1/012075 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | When a stellar-mass compact object is captured by a supermassive black hole
located in a galactic centre, the system losses energy and angular momentum by
the emission of gravitational waves. Subsequently, the stellar compact object
evolves inspiraling until plunging onto the massive black hole. These EMRI
systems ar... | [
{
"created": "Thu, 10 Mar 2011 21:54:35 GMT",
"version": "v1"
}
] | 2011-09-28 | [
[
"Canizares",
"Priscilla",
""
],
[
"Sopuerta",
"Carlos F.",
""
]
] | When a stellar-mass compact object is captured by a supermassive black hole located in a galactic centre, the system losses energy and angular momentum by the emission of gravitational waves. Subsequently, the stellar compact object evolves inspiraling until plunging onto the massive black hole. These EMRI systems are ... |
gr-qc/9806066 | David Polarski | Claus Kiefer, Julien Lesgourgues, David Polarski and Alexei A.
Starobinsky | The Coherence of Primordial Fluctuations Produced During Inflation | LaTeX (7 pages) | Class.Quant.Grav.15:L67-L72,1998 | 10.1088/0264-9381/15/10/002 | LMPT 06/98 | gr-qc astro-ph hep-th | null | The behaviour of quantum metric perturbations produced during inflation is
considered at the stage after the second Hubble radius crossing. It is shown
that the classical correlation between amplitude and momentum of a perturbation
mode, previously shown to emerge in the course of an effective
quantum-to-classical tr... | [
{
"created": "Mon, 15 Jun 1998 21:08:57 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Kiefer",
"Claus",
""
],
[
"Lesgourgues",
"Julien",
""
],
[
"Polarski",
"David",
""
],
[
"Starobinsky",
"Alexei A.",
""
]
] | The behaviour of quantum metric perturbations produced during inflation is considered at the stage after the second Hubble radius crossing. It is shown that the classical correlation between amplitude and momentum of a perturbation mode, previously shown to emerge in the course of an effective quantum-to-classical tran... |
2207.09214 | Bin Wu | Bin Wu, Tomohiro Ishikawa, Shoki Iwaguchi, Ryuma Shimizu, Izumi
Watanabe, Yuki Kawasaki, Yuta Michimura, Shuichiro Yokoyama, Seiji Kawamura | Conceptual design and science cases of a juggled interferometer for
gravitational wave detection | 11 pages, 9 figures | null | 10.1103/PhysRevD.106.042007 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Juggled interferometer (JIFO) is an earth-based gravitational wave
detector using repeatedly free-falling test masses. With no worries of seismic
noise and suspension thermal noise, the JIFO can have much better sensitivity
at lower frequencies than the current earth-based gravitational wave detectors.
The data r... | [
{
"created": "Tue, 19 Jul 2022 12:01:17 GMT",
"version": "v1"
}
] | 2022-08-31 | [
[
"Wu",
"Bin",
""
],
[
"Ishikawa",
"Tomohiro",
""
],
[
"Iwaguchi",
"Shoki",
""
],
[
"Shimizu",
"Ryuma",
""
],
[
"Watanabe",
"Izumi",
""
],
[
"Kawasaki",
"Yuki",
""
],
[
"Michimura",
"Yuta",
""
],
[
"Y... | The Juggled interferometer (JIFO) is an earth-based gravitational wave detector using repeatedly free-falling test masses. With no worries of seismic noise and suspension thermal noise, the JIFO can have much better sensitivity at lower frequencies than the current earth-based gravitational wave detectors. The data rea... |
1912.05824 | Shibendu Gupta Choudhury | Shibendu Gupta Choudhury, Soumya Chakrabarti, Ananda Dasgupta and
Narayan Banerjee | Self Similar Collapse and the Raychaudhuri equation | 7 pages, to appear in EPJC | Eur. Phys. J. C (2019) 79: 1027 | 10.1140/epjc/s10052-019-7559-9 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The role of the Raychaudhuri equation in studying gravitational collapse is
discussed. A self-similar distribution of a scalar field along with an
imperfect fluid in a conformally flat spacetime is considered for the purpose.
The general focusing condition is found out and verified against the available
exact solutio... | [
{
"created": "Thu, 12 Dec 2019 08:12:25 GMT",
"version": "v1"
}
] | 2019-12-30 | [
[
"Choudhury",
"Shibendu Gupta",
""
],
[
"Chakrabarti",
"Soumya",
""
],
[
"Dasgupta",
"Ananda",
""
],
[
"Banerjee",
"Narayan",
""
]
] | The role of the Raychaudhuri equation in studying gravitational collapse is discussed. A self-similar distribution of a scalar field along with an imperfect fluid in a conformally flat spacetime is considered for the purpose. The general focusing condition is found out and verified against the available exact solutions... |
gr-qc/0202004 | Leonid V. Verozub | L.V.Verozub | Metric-Field Approach to Gravitation and the Problem of the Universe
Acceleration | LaTex2e, 10 pages, 2 figures. To appear in the Proc.of the
Conf."Cosmology and Elementary particle physics" at Coral Gables, December
11-16,2001 | null | 10.1063/1.1492151 | null | gr-qc | null | A metric-field approach to gravitation is presented. It is based on an idea
of dependency of space-time properties on measuring instruments. Some bimetric
equations that realize this idea are considered. They were tested by the binary
pulsar PSR1913+16. The spherically - symmetric solution of the equations has no
eve... | [
{
"created": "Sat, 2 Feb 2002 12:04:24 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Verozub",
"L. V.",
""
]
] | A metric-field approach to gravitation is presented. It is based on an idea of dependency of space-time properties on measuring instruments. Some bimetric equations that realize this idea are considered. They were tested by the binary pulsar PSR1913+16. The spherically - symmetric solution of the equations has no event... |
1304.0210 | Patrick Sutton | Patrick J. Sutton | A Rule of Thumb for the Detectability of Gravitational-Wave Bursts | 8 pages, 1 figure | null | null | LIGO-P1000041-v3 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We derive a simple relationship between the energy emitted in gravitational
waves for a narrowband source and the distance to which that emission can be
detected by a single detector. We consider linearly polarized, elliptically
polarized, and unpolarized gravitational waves, and emission patterns
appropriate for eac... | [
{
"created": "Sun, 31 Mar 2013 14:28:40 GMT",
"version": "v1"
}
] | 2013-04-02 | [
[
"Sutton",
"Patrick J.",
""
]
] | We derive a simple relationship between the energy emitted in gravitational waves for a narrowband source and the distance to which that emission can be detected by a single detector. We consider linearly polarized, elliptically polarized, and unpolarized gravitational waves, and emission patterns appropriate for each ... |
0804.0594 | Bruno Giacomazzo | Luca Baiotti, Bruno Giacomazzo, Luciano Rezzolla | Accurate evolutions of inspiralling neutron-star binaries: prompt and
delayed collapse to black hole | 35 pages, 29 figures, corrected few typos to match the published
version. High-resolution figures and animations can be found at
http://numrel.aei.mpg.de/Visualisations/Archive/BinaryNeutronStars/Relativistic_Meudon/index.html | Phys.Rev.D78:084033,2008 | 10.1103/PhysRevD.78.084033 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Binary neutron-star (BNS) systems represent primary sources for the
gravitational-wave (GW) detectors. We present a systematic investigation in
full GR of the dynamics and GW emission from BNS which inspiral and merge,
producing a black hole (BH) surrounded by a torus. Our results represent the
state of the art from ... | [
{
"created": "Thu, 3 Apr 2008 17:40:45 GMT",
"version": "v1"
},
{
"created": "Wed, 24 Sep 2008 19:51:32 GMT",
"version": "v2"
},
{
"created": "Fri, 24 Oct 2008 13:34:23 GMT",
"version": "v3"
}
] | 2008-11-26 | [
[
"Baiotti",
"Luca",
""
],
[
"Giacomazzo",
"Bruno",
""
],
[
"Rezzolla",
"Luciano",
""
]
] | Binary neutron-star (BNS) systems represent primary sources for the gravitational-wave (GW) detectors. We present a systematic investigation in full GR of the dynamics and GW emission from BNS which inspiral and merge, producing a black hole (BH) surrounded by a torus. Our results represent the state of the art from se... |
gr-qc/0401051 | Kuiroukidis | A. Kuiroukidis and D.B. Papadopoulos (Thessaloniki) | Pre-Inflation in the Presence of Conformal Coupling | 11 pages, 5 figures, LaTeX, Accepted for publication in MPLA | Mod.Phys.Lett. A19 (2004) 807-816 | 10.1142/S0217732304013386 | null | gr-qc | null | We consider a massless scalar field, conformally coupled to the Ricci scalar
curvature, in the pre-inflation era of a closed FLRW Universe. The scalar field
potential can be of the form of the Coleman-Weinberg one-loop potential, which
is flat at the origin and drives the inflationary evolution. For positive
values o... | [
{
"created": "Tue, 13 Jan 2004 10:13:00 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Kuiroukidis",
"A.",
"",
"Thessaloniki"
],
[
"Papadopoulos",
"D. B.",
"",
"Thessaloniki"
]
] | We consider a massless scalar field, conformally coupled to the Ricci scalar curvature, in the pre-inflation era of a closed FLRW Universe. The scalar field potential can be of the form of the Coleman-Weinberg one-loop potential, which is flat at the origin and drives the inflationary evolution. For positive values of ... |
1606.05211 | Emilio Elizalde | Emilio Elizalde, Andrey N. Makarenko | Singular inflation from Born-Infeld-f(R) gravity | 8 pages, 14 figures; version to appear in MPLA | null | 10.1142/S0217732316501492 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Accelerating dynamics from Born-Infeld-$f(R)$ gravity are studied in a
simplified conformal approach without matter. Explicit unification of inflation
with late-time acceleration is realized within this singular inflation
approach, which is similar to Odintsov-Oikonomou singular $f(R)$ inflation. Our
model turns out ... | [
{
"created": "Thu, 16 Jun 2016 14:49:25 GMT",
"version": "v1"
}
] | 2016-08-17 | [
[
"Elizalde",
"Emilio",
""
],
[
"Makarenko",
"Andrey N.",
""
]
] | Accelerating dynamics from Born-Infeld-$f(R)$ gravity are studied in a simplified conformal approach without matter. Explicit unification of inflation with late-time acceleration is realized within this singular inflation approach, which is similar to Odintsov-Oikonomou singular $f(R)$ inflation. Our model turns out to... |
gr-qc/0202087 | Marc Mars | Marc Mars | Axially symmetric Einstein-Straus models | Latex, no figures | Phys.Rev. D57 (1998) 3389-3400 | 10.1103/PhysRevD.57.3389 | null | gr-qc | null | The existence of static and axially symmetric regions in a Friedman-Lemaitre
cosmology is investigated under the only assumption that the cosmic time and
the static time match properly on the boundary hypersurface. It turns out that
the most general form for the static region is a two-sphere with arbitrarily
changing... | [
{
"created": "Sat, 23 Feb 2002 18:26:15 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Mars",
"Marc",
""
]
] | The existence of static and axially symmetric regions in a Friedman-Lemaitre cosmology is investigated under the only assumption that the cosmic time and the static time match properly on the boundary hypersurface. It turns out that the most general form for the static region is a two-sphere with arbitrarily changing r... |
1610.01246 | Zichang Huang | Muxin Han and Zichang Huang | SU(2) Flat Connection on Riemann Surface and Twisted Geometry with
Cosmological Constant | 10+2 pages, 21 figures | Phys. Rev. D 95, 044018 (2017) | 10.1103/PhysRevD.95.044018 | null | gr-qc hep-th math-ph math.GT math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | SU(2) flat connection on 2D Riemann surface is shown to relate to the
generalized twisted geometry in 3D space with cosmological constant. Various
flat connection quantities on Riemann surface are mapped to the geometrical
quantities in discrete 3D space. We propose that the moduli space of SU(2) flat
connections on ... | [
{
"created": "Wed, 5 Oct 2016 01:18:25 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Feb 2017 05:19:39 GMT",
"version": "v2"
}
] | 2017-03-01 | [
[
"Han",
"Muxin",
""
],
[
"Huang",
"Zichang",
""
]
] | SU(2) flat connection on 2D Riemann surface is shown to relate to the generalized twisted geometry in 3D space with cosmological constant. Various flat connection quantities on Riemann surface are mapped to the geometrical quantities in discrete 3D space. We propose that the moduli space of SU(2) flat connections on Ri... |
2010.07224 | Quentin Baghi | Quentin Baghi, James Ira Thorpe, Jacob Slutsky, John Baker | A statistical inference approach to time-delay interferometry for
gravitational-wave detection | More realistic gravitational-wave source used as a case study.
Figures 3-7 modified. Rationale and conclusions unchanged | Phys. Rev. D 103, 042006 (2021) | 10.1103/PhysRevD.103.042006 | null | gr-qc astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The future space-based gravitational wave observatory LISA will consist of a
constellation of three spacecraft in a triangular constellation, connected by
laser interferometers with 2.5 million-kilometer arms. Among other challenges,
the success of the mission strongly depends on the quality of the cancellation
of la... | [
{
"created": "Wed, 14 Oct 2020 16:38:49 GMT",
"version": "v1"
},
{
"created": "Tue, 26 Apr 2022 07:59:40 GMT",
"version": "v2"
}
] | 2022-04-27 | [
[
"Baghi",
"Quentin",
""
],
[
"Thorpe",
"James Ira",
""
],
[
"Slutsky",
"Jacob",
""
],
[
"Baker",
"John",
""
]
] | The future space-based gravitational wave observatory LISA will consist of a constellation of three spacecraft in a triangular constellation, connected by laser interferometers with 2.5 million-kilometer arms. Among other challenges, the success of the mission strongly depends on the quality of the cancellation of lase... |
gr-qc/0204080 | Jeremy S. Heyl | Ramesh Narayan (IAS and Harvard-Smithonian CfA) and Jeremy S. Heyl
(Harvard-Smithsonian CfA) | Evidence for the Black Hole Event Horizon | 10 pages, 1 figure; Invited contribution to the Coral Gables
Conference on High Energy Physics and Cosmology, December, 2001 (eds. B.
Kursunoglu and A. Perlmutter; American Institute of Physics Conference
Proceedings). After it is published, it will be found at
http://proceedings.aip.org/proceedings/ | null | 10.1063/1.1492161 | null | gr-qc astro-ph | null | Roughly a dozen X-ray binaries are presently known in which the compact
accreting primary stars are too massive to be neutron stars. These primaries
are identified as black holes, though there is as yet no definite proof that
any of the candidate black holes actually possesses an event horizon. We
discuss how Type I ... | [
{
"created": "Fri, 26 Apr 2002 14:08:36 GMT",
"version": "v1"
}
] | 2009-11-07 | [
[
"Narayan",
"Ramesh",
"",
"IAS and Harvard-Smithonian CfA"
],
[
"Heyl",
"Jeremy S.",
"",
"Harvard-Smithsonian CfA"
]
] | Roughly a dozen X-ray binaries are presently known in which the compact accreting primary stars are too massive to be neutron stars. These primaries are identified as black holes, though there is as yet no definite proof that any of the candidate black holes actually possesses an event horizon. We discuss how Type I X-... |
2210.07525 | Subenoy Chakraborty | Dhritimalya Roy, Ayanendu Dutta, Subenoy Chakraborty | Does violation of Cosmic No-hair Conjecture guarantee the existence of
Wormhole? | null | Europhysics Letters 140, 19002 (2022) | 10.1209/0295-5075/ac969d | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present work investigates the interrelation between the validity (or
violation) of the cosmic no-hair conjecture and the existence (or
non-existence) of wormholes, both in Einstein's Gravity and in modified gravity
theories. It is found that the existence of wormholes implies a violation of
the cosmic no-hair con... | [
{
"created": "Fri, 14 Oct 2022 05:12:09 GMT",
"version": "v1"
}
] | 2022-10-17 | [
[
"Roy",
"Dhritimalya",
""
],
[
"Dutta",
"Ayanendu",
""
],
[
"Chakraborty",
"Subenoy",
""
]
] | The present work investigates the interrelation between the validity (or violation) of the cosmic no-hair conjecture and the existence (or non-existence) of wormholes, both in Einstein's Gravity and in modified gravity theories. It is found that the existence of wormholes implies a violation of the cosmic no-hair conje... |
2112.13049 | Shaoqi Hou | Shaoqi Hou, Tao Zhu, Zong-Hong Zhu | Conserved charges in Chern-Simons modified theory and memory effects | 34 pages. Minor changes according to Referee's suggestions | JCAP04(2022)032 | 10.1088/1475-7516/2022/04/032 | null | gr-qc hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, conserved charges and fluxes at the future null infinity are
determined in the asymptotically flat spacetime for Chern-Simons modified
gravity. The flux-balance laws are used to constrain the memory effects. For
tensor memories, the Penrose's conformal completion method is used to analyze
the asymptotic... | [
{
"created": "Fri, 24 Dec 2021 12:24:51 GMT",
"version": "v1"
},
{
"created": "Sun, 2 Jan 2022 13:07:17 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Mar 2022 09:31:45 GMT",
"version": "v3"
}
] | 2022-04-22 | [
[
"Hou",
"Shaoqi",
""
],
[
"Zhu",
"Tao",
""
],
[
"Zhu",
"Zong-Hong",
""
]
] | In this work, conserved charges and fluxes at the future null infinity are determined in the asymptotically flat spacetime for Chern-Simons modified gravity. The flux-balance laws are used to constrain the memory effects. For tensor memories, the Penrose's conformal completion method is used to analyze the asymptotic s... |
0803.3278 | Lorenzo Iorio | Lorenzo Iorio | Will the recently approved LARES mission be able to measure the
Lense-Thirring effect at 1%? | Latex, 15 pages, 1 table, no figures. Final version matching the
published one in General Relativity and Gravitation (GRG) | Gen.Rel.Grav.41:1717-1724,2009 | 10.1007/s10714-008-0742-1 | null | gr-qc astro-ph physics.geo-ph physics.space-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | After the approval by the Italian Space Agency of the LARES satellite, which
should be launched at the end of 2009 with a VEGA rocket and whose claimed goal
is a about 1% measurement of the general relativistic gravitomagnetic
Lense-Thirring effect in the gravitational field of the spinning Earth, it is
of the utmost... | [
{
"created": "Sat, 22 Mar 2008 22:54:21 GMT",
"version": "v1"
},
{
"created": "Sun, 13 Apr 2008 10:00:31 GMT",
"version": "v2"
},
{
"created": "Thu, 29 May 2008 18:28:33 GMT",
"version": "v3"
},
{
"created": "Mon, 8 Dec 2008 10:00:49 GMT",
"version": "v4"
},
{
"cr... | 2009-07-29 | [
[
"Iorio",
"Lorenzo",
""
]
] | After the approval by the Italian Space Agency of the LARES satellite, which should be launched at the end of 2009 with a VEGA rocket and whose claimed goal is a about 1% measurement of the general relativistic gravitomagnetic Lense-Thirring effect in the gravitational field of the spinning Earth, it is of the utmost i... |
1707.02802 | {\L}ukasz Nakonieczny | {\L}ukasz Nakonieczny, Anna Nakonieczna and Marek Rogatko | Dark matter cosmic string in the gravitational field of a black hole | This is an author-created, uncopyedited version of an article
accepted for publication in Journal of Cosmology and Astroparticle Physics .
IOP Publishing Ltd is not responsible for any errors or omissions in this
version of the manuscript or any version derived from it. The definitive
publisher-authenticated ve... | JCAP03(2018)024 | 10.1088/1475-7516/2018/03/024 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We examined analytically and proposed a numerical model of an Abelian Higgs
dark matter vortex in the spacetime of a stationary axisymmetric Kerr black
hole. In analytical calculations the dark matter sector was modeled by an
addition of a U (1)-gauge field coupled to the visible sector. The backreaction
analysis rev... | [
{
"created": "Mon, 10 Jul 2017 11:31:33 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Feb 2018 11:27:49 GMT",
"version": "v2"
},
{
"created": "Fri, 30 Mar 2018 08:14:34 GMT",
"version": "v3"
}
] | 2018-04-02 | [
[
"Nakonieczny",
"Łukasz",
""
],
[
"Nakonieczna",
"Anna",
""
],
[
"Rogatko",
"Marek",
""
]
] | We examined analytically and proposed a numerical model of an Abelian Higgs dark matter vortex in the spacetime of a stationary axisymmetric Kerr black hole. In analytical calculations the dark matter sector was modeled by an addition of a U (1)-gauge field coupled to the visible sector. The backreaction analysis revea... |
1210.7968 | B\'arbara Montes N\'u\~nez | B. Montes N\'u\~nez, J. A. R. Cembranos and A. de la Cruz-Dombriz | On the collapse in fourth order gravities | 4 pages, 2 figures, Contribution to the Proceedings of Spanish
Relativity Meeting ERE2011, Madrid 2011 | AIP Conf.Proc. 1458 (2011) 491-494 | 10.1063/1.4734467 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The gravitational collapse in fourth order theories of gravity defined by an
arbitrary action of the scalar curvature shows significant deviations with
General Relativity. The presence of a new scalar mode produces a higher initial
contraction that favors the reduction of the collapsing time. However,
depending on th... | [
{
"created": "Tue, 30 Oct 2012 11:26:54 GMT",
"version": "v1"
}
] | 2012-10-31 | [
[
"Núñez",
"B. Montes",
""
],
[
"Cembranos",
"J. A. R.",
""
],
[
"de la Cruz-Dombriz",
"A.",
""
]
] | The gravitational collapse in fourth order theories of gravity defined by an arbitrary action of the scalar curvature shows significant deviations with General Relativity. The presence of a new scalar mode produces a higher initial contraction that favors the reduction of the collapsing time. However, depending on the ... |
2110.08278 | Achim Kempf | Achim Kempf | Replacing the Notion of Spacetime Distance by the Notion of Correlation | 8 pages | Front. Phys., Vol.9, 655857 (2021) | 10.3389/fphy.2021.655857 | null | gr-qc quant-ph | http://creativecommons.org/licenses/by-nc-nd/4.0/ | Spacetime is conventionally viewed as a stage on which actors, in the form of
fields, move. Here, we explore what may lie beyond this picture. The starting
point is the observation that quantum fluctuations of fields are the more
strongly correlated the shorter their spacetime distance. As a consequence, the
notion o... | [
{
"created": "Fri, 15 Oct 2021 18:00:01 GMT",
"version": "v1"
}
] | 2021-10-19 | [
[
"Kempf",
"Achim",
""
]
] | Spacetime is conventionally viewed as a stage on which actors, in the form of fields, move. Here, we explore what may lie beyond this picture. The starting point is the observation that quantum fluctuations of fields are the more strongly correlated the shorter their spacetime distance. As a consequence, the notion of ... |
1108.2779 | Brihaye Yves | Y. Brihaye | Charged, rotating black holes in Einstein-Gauss-Bonnet gravity | 14 pages, 10 figures, references added | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the Einstein-Gauss-Bonnet equations in five dimensions including
a negative cosmological constant and a Maxwell field. Using an appropriate
Ansatz for the metric and for the electromagnetic fields, we construct
numerically black holes with two equal angular momenta in the two orthogonal
space-like planes ... | [
{
"created": "Sat, 13 Aug 2011 08:59:42 GMT",
"version": "v1"
},
{
"created": "Wed, 30 Nov 2011 10:53:01 GMT",
"version": "v2"
}
] | 2011-12-01 | [
[
"Brihaye",
"Y.",
""
]
] | We consider the Einstein-Gauss-Bonnet equations in five dimensions including a negative cosmological constant and a Maxwell field. Using an appropriate Ansatz for the metric and for the electromagnetic fields, we construct numerically black holes with two equal angular momenta in the two orthogonal space-like planes of... |
2407.12920 | Zhiyao Lu | Zhiyao Lu, Lian-Tao Wang, Huangyu Xiao | A New Probe of $\mu$Hz Gravitational Waves with FRB Timing | 17 pages, 6 figures | null | null | FERMILAB-PUB-24-0365-T | gr-qc astro-ph.CO astro-ph.HE astro-ph.IM hep-ph | http://creativecommons.org/licenses/by/4.0/ | We propose Fast Radio Burst (FRB) timing, which uses the precision
measurements of the arrival time differences of repeated FRB signals along
multiple sightlines, as a new probe of gravitational waves (GWs) around nHz to
$\mu$Hz frequencies, with the highest frequency limited by FRB repeating
period. The anticipated ... | [
{
"created": "Wed, 17 Jul 2024 18:00:14 GMT",
"version": "v1"
}
] | 2024-07-19 | [
[
"Lu",
"Zhiyao",
""
],
[
"Wang",
"Lian-Tao",
""
],
[
"Xiao",
"Huangyu",
""
]
] | We propose Fast Radio Burst (FRB) timing, which uses the precision measurements of the arrival time differences of repeated FRB signals along multiple sightlines, as a new probe of gravitational waves (GWs) around nHz to $\mu$Hz frequencies, with the highest frequency limited by FRB repeating period. The anticipated ex... |
gr-qc/0701102 | Slava G. Turyshev | Slava G. Turyshev and Michael Shao | The Laser Astrometric Test of Relativity: Science, Technology, and
Mission Design | 12 pages, 4 figures. To appear in the proceedings of the
International Workshop "From Quantum to Cosmos: Fundamental Physics Research
in Space", 21-24 May 2006, Warrenton, Virginia, USA
http://physics.jpl.nasa.gov/quantum-to-cosmos/ | Int.J.Mod.Phys.D16:2191-2203,2007 | 10.1142/S0218271807011747 | null | gr-qc | null | The Laser Astrometric Test of Relativity (LATOR) experiment is designed to
explore general theory of relativity in the close proximity to the Sun -- the
most intense gravitational environment in the solar system. Using independent
time-series of highly accurate measurements of the Shapiro time-delay
(interplanetary l... | [
{
"created": "Thu, 18 Jan 2007 07:52:43 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Turyshev",
"Slava G.",
""
],
[
"Shao",
"Michael",
""
]
] | The Laser Astrometric Test of Relativity (LATOR) experiment is designed to explore general theory of relativity in the close proximity to the Sun -- the most intense gravitational environment in the solar system. Using independent time-series of highly accurate measurements of the Shapiro time-delay (interplanetary las... |
1807.00036 | Diogo Bragan\c{c}a | Diogo P. L. Bragan\c{c}a, Jos\'e P. S. Lemos | Stratified scalar field theories of gravitation with self-energy term
and effective particle Lagrangian | 12 pages | Eur. Phys. J. C 78:, 533 (2018) | 10.1140/epjc/s10052-018-6006-7 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct a general stratified scalar theory of gravitation from a field
equation that accounts for the self-interaction of the field and a particle
Lagrangian, and calculate its post-Newtonian parameters. Using this general
framework, we analyze several specific scalar theories of gravitation and check
their pred... | [
{
"created": "Fri, 29 Jun 2018 18:50:42 GMT",
"version": "v1"
}
] | 2018-12-07 | [
[
"Bragança",
"Diogo P. L.",
""
],
[
"Lemos",
"José P. S.",
""
]
] | We construct a general stratified scalar theory of gravitation from a field equation that accounts for the self-interaction of the field and a particle Lagrangian, and calculate its post-Newtonian parameters. Using this general framework, we analyze several specific scalar theories of gravitation and check their predic... |
0712.0687 | Ghanashyam Date | Kinjal Banerjee and Ghanashyam Date | Loop Quantization of Polarized Gowdy Model on $T^3$: Kinematical States
and Constraint Operators | 26 pages, no figures. Version 2 accepted for publication. This has
the sub-title changed, introduction modified for comments on references,
small errors corrected and references updated | Class.Quant.Grav.25:145004,2008 | 10.1088/0264-9381/25/14/145004 | IMSc/2007/12/16 | gr-qc hep-th | null | In this second paper on loop quantization of Gowdy model, we introduce the
kinematical Hilbert space on which appropriate holonomies and fluxes are well
represented. The quantization of the volume operator and the Gauss constraint
is straightforward. Imposition of the Gauss constraint can be done on the
kinematical H... | [
{
"created": "Wed, 5 Dec 2007 10:47:23 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Jun 2008 09:43:07 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Banerjee",
"Kinjal",
""
],
[
"Date",
"Ghanashyam",
""
]
] | In this second paper on loop quantization of Gowdy model, we introduce the kinematical Hilbert space on which appropriate holonomies and fluxes are well represented. The quantization of the volume operator and the Gauss constraint is straightforward. Imposition of the Gauss constraint can be done on the kinematical Hil... |
1005.5605 | Piero Nicolini | Leonardo Modesto and Piero Nicolini | Charged rotating noncommutative black holes | 13 pages, 3 figures, correction of a typesetting inattention, updated
reference list, version accepted for publication on Physical Review D | Phys.Rev.D82:104035,2010 | 10.1103/PhysRevD.82.104035 | null | gr-qc astro-ph.HE hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we complete the program of the noncomutative geometry inspired
black holes, providing the richest possible solution, endowed with mass, charge
and angular momentum. After providing a prescription for employing the
Newman-Janis algorithm in the case of nonvanishing stress tensors, we find
regular axisymm... | [
{
"created": "Mon, 31 May 2010 07:02:31 GMT",
"version": "v1"
},
{
"created": "Tue, 1 Jun 2010 19:19:25 GMT",
"version": "v2"
},
{
"created": "Tue, 16 Nov 2010 22:37:18 GMT",
"version": "v3"
}
] | 2010-12-13 | [
[
"Modesto",
"Leonardo",
""
],
[
"Nicolini",
"Piero",
""
]
] | In this paper we complete the program of the noncomutative geometry inspired black holes, providing the richest possible solution, endowed with mass, charge and angular momentum. After providing a prescription for employing the Newman-Janis algorithm in the case of nonvanishing stress tensors, we find regular axisymmet... |
2401.05448 | Pardyumn Kumar Sahoo | Dheeraj Singh Rana, Raja Solanki, P.K. Sahoo | Phase-space analysis of the viscous fluid cosmological models in the
coincident $f(Q)$ gravity | Physics of the Dark Universe accepted version | Physics of the Dark Universe, 43 (2024) 101421 | 10.1016/j.dark.2024.101421 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | In this article, we consider a newly proposed parameterization of the
viscosity coefficient $\zeta$, specifically $\zeta=\bar{\zeta}_0 {\Omega^s_m} H
$, where $\bar{\zeta}_0 = \frac{\zeta_0}{{\Omega^s_{m_0}}} $ within the
coincident $f(Q)$ gravity formalism. We consider a non-linear function $f(Q)=
-Q +\alpha Q^n$, w... | [
{
"created": "Tue, 9 Jan 2024 11:09:30 GMT",
"version": "v1"
}
] | 2024-01-17 | [
[
"Rana",
"Dheeraj Singh",
""
],
[
"Solanki",
"Raja",
""
],
[
"Sahoo",
"P. K.",
""
]
] | In this article, we consider a newly proposed parameterization of the viscosity coefficient $\zeta$, specifically $\zeta=\bar{\zeta}_0 {\Omega^s_m} H $, where $\bar{\zeta}_0 = \frac{\zeta_0}{{\Omega^s_{m_0}}} $ within the coincident $f(Q)$ gravity formalism. We consider a non-linear function $f(Q)= -Q +\alpha Q^n$, whe... |
1412.6758 | Xavier Calmet | Xavier Calmet | Quantum black holes and effective quantum gravity approaches | 5 pages, written in 2013. To appear in the proceedings of the Karl
Schwarzschild Meeting (Frankfurt, July 22-26, 2013) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This is the text of the invited talk I have given at the Karl Schwarzschild
Meeting in Frankfurt in 2013.
| [
{
"created": "Sun, 21 Dec 2014 10:22:22 GMT",
"version": "v1"
}
] | 2014-12-23 | [
[
"Calmet",
"Xavier",
""
]
] | This is the text of the invited talk I have given at the Karl Schwarzschild Meeting in Frankfurt in 2013. |
1606.08296 | Fabien Nugier | Fabien Nugier | From GLC to double-null coordinates and illustration with static black
holes | 30 pages, 3 figures. Comments and references added. Paper published
in JCAP | JCAP09(2016)019 | 10.1088/1475-7516/2016/09/019 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present a system of coordinates deriving directly from the so-called
Geodesic Light-Cone (GLC) coordinates and made of two null scalars intersecting
on a 2-dimensional sphere parameterized by two constant angles along geodesics.
These coordinates are shown to be equivalent to the well-known double-null
coordinates... | [
{
"created": "Fri, 24 Jun 2016 11:54:15 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Sep 2016 04:41:41 GMT",
"version": "v2"
}
] | 2016-09-16 | [
[
"Nugier",
"Fabien",
""
]
] | We present a system of coordinates deriving directly from the so-called Geodesic Light-Cone (GLC) coordinates and made of two null scalars intersecting on a 2-dimensional sphere parameterized by two constant angles along geodesics. These coordinates are shown to be equivalent to the well-known double-null coordinates. ... |
2305.19313 | Nicola Franchini | Nicola Franchini | Slow rotation black hole perturbation theory | 21 pages (12 + appendix and bibliography). Minor changes and
additions to the bibliography | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we present a detailed analysis of first-order perturbations of
the Kerr metric in the slow-rotation limit. We perform the calculation by
perturbing the Schwarzschild metric plus up to second-order corrections in the
spin in the Regge-Wheeler gauge. The apparent coupling between different
angular moment... | [
{
"created": "Tue, 30 May 2023 18:00:00 GMT",
"version": "v1"
},
{
"created": "Tue, 13 Jun 2023 15:31:46 GMT",
"version": "v2"
}
] | 2023-06-14 | [
[
"Franchini",
"Nicola",
""
]
] | In this paper, we present a detailed analysis of first-order perturbations of the Kerr metric in the slow-rotation limit. We perform the calculation by perturbing the Schwarzschild metric plus up to second-order corrections in the spin in the Regge-Wheeler gauge. The apparent coupling between different angular momentum... |
gr-qc/9902015 | Kirill Krasnov | Kirill Krasnov | Quanta of Geometry and Rotating Black Holes | 5 pages | Class.Quant.Grav.16:L15-L18,1999 | 10.1088/0264-9381/16/4/015 | CGPG-98/3-3 | gr-qc | null | In the loop approach to quantum gravity the spectra of operators
corresponding to such geometrical quantities as length, area and volume become
quantized. However, the size of arising quanta of geometry in Planck units is
not fixed by the theory itself: a free parameter, sometimes referred to as
Immirzi parameter, is... | [
{
"created": "Thu, 4 Feb 1999 05:03:51 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Krasnov",
"Kirill",
""
]
] | In the loop approach to quantum gravity the spectra of operators corresponding to such geometrical quantities as length, area and volume become quantized. However, the size of arising quanta of geometry in Planck units is not fixed by the theory itself: a free parameter, sometimes referred to as Immirzi parameter, is k... |
gr-qc/9704078 | Smirichinskii V. I. | V.N.Pervushin, V.I Smirichinski | On the Cosmological Origin of the Homogeneous Scalar Field in Unified
Theories | 8 pages, Latex | null | null | JINR E2-97-155 | gr-qc | null | We consider the possibility of describing the Higgs effect in unified
theories without the Higgs potential in the presence of the Einstein gravity
with the conformal gravity-scalar coupling under the assumption of homogeneous
matter distribution.
The scalar field values can be found from the Friedmann equations for... | [
{
"created": "Mon, 28 Apr 1997 13:30:54 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Pervushin",
"V. N.",
""
],
[
"Smirichinski",
"V. I",
""
]
] | We consider the possibility of describing the Higgs effect in unified theories without the Higgs potential in the presence of the Einstein gravity with the conformal gravity-scalar coupling under the assumption of homogeneous matter distribution. The scalar field values can be found from the Friedmann equations for the... |
2006.11281 | Yongqiang Wang | Hong-Bo Li, Yan-Bo Zeng, Yan Song, Yong-Qiang Wang | Self-interacting multistate boson stars | 21 pages, 7 figures. arXiv admin note: text overlap with
arXiv:1906.00420 | null | 10.1007/JHEP04(2021)042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we consider rotating multistate boson stars with quartic
self-interactions. In contrast to the nodeless quartic-boson stars in
\cite{Herdeiro:2015tia}, the self-interacting multistate boson stars (SIMBSs)
have two types of nodes, including the $^1S^2S$ and $^1S^2P$ states. We show
the mass $M$ of SIMBS... | [
{
"created": "Fri, 19 Jun 2020 09:24:59 GMT",
"version": "v1"
}
] | 2021-04-21 | [
[
"Li",
"Hong-Bo",
""
],
[
"Zeng",
"Yan-Bo",
""
],
[
"Song",
"Yan",
""
],
[
"Wang",
"Yong-Qiang",
""
]
] | In this paper, we consider rotating multistate boson stars with quartic self-interactions. In contrast to the nodeless quartic-boson stars in \cite{Herdeiro:2015tia}, the self-interacting multistate boson stars (SIMBSs) have two types of nodes, including the $^1S^2S$ and $^1S^2P$ states. We show the mass $M$ of SIMBSs ... |
gr-qc/9404015 | Ian Moss | Chris M. Chambers and Ian G. Moss | Stability of the Cauchy horizon in Kerr--de Sitter spacetimes | 21 pages, NCL93-TP10 (TeX) | Class.Quant.Grav.11:1035-1054,1994 | 10.1088/0264-9381/11/4/019 | null | gr-qc | null | We begin a program of work aimed at examining the interior of a rotating
black hole with a non--zero cosmological constant. The generalisation of
Teukolsky's equation for the radial mode functions is presented. It is shown
that the energy fluxes of scalar, electromagnetic and gravity waves are regular
at the Cauchy h... | [
{
"created": "Fri, 8 Apr 1994 16:21:27 GMT",
"version": "v1"
}
] | 2010-04-06 | [
[
"Chambers",
"Chris M.",
""
],
[
"Moss",
"Ian G.",
""
]
] | We begin a program of work aimed at examining the interior of a rotating black hole with a non--zero cosmological constant. The generalisation of Teukolsky's equation for the radial mode functions is presented. It is shown that the energy fluxes of scalar, electromagnetic and gravity waves are regular at the Cauchy hor... |
1104.3488 | Barun Majumder | Barun Majumder | Effects of GUP in Quantum Cosmological Perfect Fluid Models | 10 pages. Accepted for publication in Physics Letters B | Physics Letters B 699 (2011) 315 - 319 | 10.1016/j.physletb.2011.04.030 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Very recently authors in [5] proposed a new Generalized Uncertainty Principle
(or GUP) with a linear term in Plank length. In this Letter the effect of this
GUP is studied in quantum cosmological models with dust and cosmic string as
the perfect fluid. For the quantum mechanical description it is possible to
find the... | [
{
"created": "Mon, 18 Apr 2011 14:06:17 GMT",
"version": "v1"
}
] | 2011-05-11 | [
[
"Majumder",
"Barun",
""
]
] | Very recently authors in [5] proposed a new Generalized Uncertainty Principle (or GUP) with a linear term in Plank length. In this Letter the effect of this GUP is studied in quantum cosmological models with dust and cosmic string as the perfect fluid. For the quantum mechanical description it is possible to find the w... |
1608.04723 | Parthapratim Pradhan | Parthapratim Pradhan | Extremal limits and Ba\~nados-Silk-West effect | 9 pages | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A fascinating property of extremal Kerr black hole (BH) is that it could be
act as a particle accelerator with infinite high center-of-mass (CM) energy
\cite{bsw}. In this note, we would like to discuss about such fascinating
result and to point out that this infinite energy at the event horizon comes
solely due \emp... | [
{
"created": "Tue, 16 Aug 2016 19:39:30 GMT",
"version": "v1"
}
] | 2016-08-17 | [
[
"Pradhan",
"Parthapratim",
""
]
] | A fascinating property of extremal Kerr black hole (BH) is that it could be act as a particle accelerator with infinite high center-of-mass (CM) energy \cite{bsw}. In this note, we would like to discuss about such fascinating result and to point out that this infinite energy at the event horizon comes solely due \emph{... |
gr-qc/0701051 | Stanislav Hled\'ik | Stanislav Hledik, Zdenek Stuchlik and Kristina Mrazova | Dynamical stability of fluid spheres in spacetimes with a nonzero
cosmological constant | 3 pages, 1 figure, to appear in "Proceedings of the 11th Marcel
Grossmann Meeting on General Relativity", eds H. Kleinert, R. T. Jantzen, R.
Ruffini | null | 10.1142/9789812834300_0097 | null | gr-qc | null | The Sturm-Liouville eigenvalue equation for eigenmodes of the radial
oscillations is determined for spherically symmetric perfect fluid
configurations in spacetimes with a nonzero cosmological constant and applied
in the cases of configurations with uniform distribution of energy density and
polytropic spheres. It is... | [
{
"created": "Tue, 9 Jan 2007 13:14:13 GMT",
"version": "v1"
},
{
"created": "Mon, 15 Jan 2007 16:28:08 GMT",
"version": "v2"
}
] | 2016-11-15 | [
[
"Hledik",
"Stanislav",
""
],
[
"Stuchlik",
"Zdenek",
""
],
[
"Mrazova",
"Kristina",
""
]
] | The Sturm-Liouville eigenvalue equation for eigenmodes of the radial oscillations is determined for spherically symmetric perfect fluid configurations in spacetimes with a nonzero cosmological constant and applied in the cases of configurations with uniform distribution of energy density and polytropic spheres. It is s... |
0712.3685 | Jurjen Koksma | Jurjen F. Koksma (Utrecht University, ITP) Tomislav Prokopec (Utrecht
University, ITP) Gerasimos I. Rigopoulos (University of Helsinki, HIP) | The Scalar Field Kernel in Cosmological Spaces | 13 pages, 1 figure | Class.Quant.Grav.25:125009,2008 | 10.1088/0264-9381/25/12/125009 | ITP-UU-07/65, SPIN-07/50, HIP-2008-02/TH | gr-qc hep-th quant-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We construct the quantum mechanical evolution operator in the Functional
Schrodinger picture - the kernel - for a scalar field in spatially homogeneous
FLRW spacetimes when the field is a) free and b) coupled to a spacetime
dependent source term. The essential element in the construction is the causal
propagator, lin... | [
{
"created": "Fri, 21 Dec 2007 12:30:55 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Jun 2008 13:27:25 GMT",
"version": "v2"
}
] | 2008-11-26 | [
[
"Koksma",
"Jurjen F.",
"",
"Utrecht University, ITP"
],
[
"Prokopec",
"Tomislav",
"",
"Utrecht\n University, ITP"
],
[
"Rigopoulos",
"Gerasimos I.",
"",
"University of Helsinki, HIP"
]
] | We construct the quantum mechanical evolution operator in the Functional Schrodinger picture - the kernel - for a scalar field in spatially homogeneous FLRW spacetimes when the field is a) free and b) coupled to a spacetime dependent source term. The essential element in the construction is the causal propagator, linke... |
2102.05722 | Helios Sanchis-Alepuz | Georg Herzog and H\`elios Sanchis-Alepuz | Neutron Stars in Palatini $R+\alpha R^2$ and $R+\alpha R^2+\beta Q$
Theories | 13 pages, 18 figures. References added. Discussion around Fig. 18
extended. Agrees with published version | Eur.Phys.J.C 81 (2021) 10, 888 | 10.1140/epjc/s10052-021-09662-z | null | gr-qc hep-ph | http://creativecommons.org/licenses/by/4.0/ | We study solutions of the stellar structure equations for spherically
symmetric objects in Palatini $f(R)=R+\alpha R^2$ and $f(R,Q)=R+\alpha
R^2+\beta Q$ in the mass-radius region associated to neutron stars. We
illustrate the potential impact of the $R^2$ and $Q$ terms by studying a range
of viable values of $\alpha... | [
{
"created": "Wed, 10 Feb 2021 20:07:09 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Jun 2021 07:24:58 GMT",
"version": "v2"
},
{
"created": "Tue, 19 Oct 2021 06:05:57 GMT",
"version": "v3"
}
] | 2021-10-20 | [
[
"Herzog",
"Georg",
""
],
[
"Sanchis-Alepuz",
"Hèlios",
""
]
] | We study solutions of the stellar structure equations for spherically symmetric objects in Palatini $f(R)=R+\alpha R^2$ and $f(R,Q)=R+\alpha R^2+\beta Q$ in the mass-radius region associated to neutron stars. We illustrate the potential impact of the $R^2$ and $Q$ terms by studying a range of viable values of $\alpha$ ... |
1711.05419 | Canisius Bernard | Canisius Bernard | Analytical Study of a Kerr-Sen Black Hole and a Charged Massive Scalar
Field | 18 pages, no figures; v2: references are added, typos are corrected,
to be published in Physical Review D. The reference list is slightly
different from the journal version | Phys. Rev. D 96, 105025 (2017) | 10.1103/PhysRevD.96.105025 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is reported that Kerr-Newman and Kerr-Sen black holes are unstable to
perturbations of charged massive scalar field. In this paper, we study
analytically the complex frequencies which characterize charged massive scalar
fields in a near-extremal Kerr-Sen black hole. For near-extremal Kerr-Sen black
holes and for c... | [
{
"created": "Wed, 15 Nov 2017 06:02:08 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Nov 2017 09:56:45 GMT",
"version": "v2"
}
] | 2017-11-30 | [
[
"Bernard",
"Canisius",
""
]
] | It is reported that Kerr-Newman and Kerr-Sen black holes are unstable to perturbations of charged massive scalar field. In this paper, we study analytically the complex frequencies which characterize charged massive scalar fields in a near-extremal Kerr-Sen black hole. For near-extremal Kerr-Sen black holes and for cha... |
0804.1075 | Lior M. Burko | Jonathan L. Barton, David J. Lazar, Daniel J. Kennefick, Gaurav
Khanna, and Lior M. Burko | Computational Efficiency of Frequency-- and Time--Domain Calculations of
Extreme Mass--Ratio Binaries: Equatorial Orbits | 19 figures, 6 tables | Phys.Rev.D78:064042,2008 | 10.1103/PhysRevD.78.064042 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational waveforms and fluxes from extreme mass--ratio inspirals can be
computed using time--domain methods with accuracy that is fast approaching that
of frequency--domain methods. We study in detail the computational efficiency
of these methods for equatorial orbits of fast spinning Kerr black holes, and
find ... | [
{
"created": "Mon, 7 Apr 2008 16:47:47 GMT",
"version": "v1"
}
] | 2008-12-18 | [
[
"Barton",
"Jonathan L.",
""
],
[
"Lazar",
"David J.",
""
],
[
"Kennefick",
"Daniel J.",
""
],
[
"Khanna",
"Gaurav",
""
],
[
"Burko",
"Lior M.",
""
]
] | Gravitational waveforms and fluxes from extreme mass--ratio inspirals can be computed using time--domain methods with accuracy that is fast approaching that of frequency--domain methods. We study in detail the computational efficiency of these methods for equatorial orbits of fast spinning Kerr black holes, and find th... |
1405.4143 | Liu Zhao | Hao Xu, Wei Xu and Liu Zhao | Extended phase space thermodynamics for third order Lovelock black holes
in diverse dimensions | pdflatex, 22 pages, 36 eps figures included. V2: minor corrections
and new references | null | 10.1140/epjc/s10052-014-3074-1 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Treating the cosmological constant as thermodynamic pressure and its
conjugate as thermodynamic volume, we investigate the critical behavior of the
third order Lovelock black holes in diverse dimensions. For black hole horizons
with different normalized sectional curvature $k=0,\pm1$, the corresponding
critical behav... | [
{
"created": "Fri, 16 May 2014 12:15:09 GMT",
"version": "v1"
},
{
"created": "Thu, 22 May 2014 02:17:41 GMT",
"version": "v2"
}
] | 2015-06-19 | [
[
"Xu",
"Hao",
""
],
[
"Xu",
"Wei",
""
],
[
"Zhao",
"Liu",
""
]
] | Treating the cosmological constant as thermodynamic pressure and its conjugate as thermodynamic volume, we investigate the critical behavior of the third order Lovelock black holes in diverse dimensions. For black hole horizons with different normalized sectional curvature $k=0,\pm1$, the corresponding critical behavio... |
gr-qc/0308079 | Fangyu Li | Fang-Yu Li, Meng-Xi Tang, and Dong-Ping Shi | Electromagnetic Response for High-Frequency Gravitational Waves in the
GHz to THz Band | 19 pages, 3 figures | Invited talk at the first international conference on
High-Frequency Gravitational Waves, Paper-03-108, May 2003, The MITRE
Corporation, Mclean, Viginia, USA | null | null | gr-qc | null | We consider the electromagnetic (EM) response of a Gaussian beam passing
through a static magnetic field to be the high-frequency gravitational waves
(HFGW) as generated by several devices discussed at this conference. It is
found that under the synchroresonance condition, the first-order perturbative
EM power fluxes... | [
{
"created": "Mon, 25 Aug 2003 03:24:39 GMT",
"version": "v1"
},
{
"created": "Sun, 5 Oct 2003 02:51:40 GMT",
"version": "v2"
}
] | 2007-05-23 | [
[
"Li",
"Fang-Yu",
""
],
[
"Tang",
"Meng-Xi",
""
],
[
"Shi",
"Dong-Ping",
""
]
] | We consider the electromagnetic (EM) response of a Gaussian beam passing through a static magnetic field to be the high-frequency gravitational waves (HFGW) as generated by several devices discussed at this conference. It is found that under the synchroresonance condition, the first-order perturbative EM power fluxes w... |
2212.06162 | Giulia Capurri | Giulia Capurri, Andrea Lapi, Lumen Boco and Carlo Baccigalupi | Searching for anisotropic stochastic gravitational-wave backgrounds with
constellations of space-based interferometers | 17 pages, 9 figures, accepted by ApJ | null | 10.3847/1538-4357/acaaa3 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Many recent works have shown that the angular resolution of ground-based
detectors is too poor to characterize the anisotropies of the stochastic
gravitational-wave background (SGWB). For this reason, we asked ourselves if a
constellation of space-based instruments could be more suitable. We consider
the Laser Interf... | [
{
"created": "Mon, 12 Dec 2022 19:00:01 GMT",
"version": "v1"
}
] | 2023-01-31 | [
[
"Capurri",
"Giulia",
""
],
[
"Lapi",
"Andrea",
""
],
[
"Boco",
"Lumen",
""
],
[
"Baccigalupi",
"Carlo",
""
]
] | Many recent works have shown that the angular resolution of ground-based detectors is too poor to characterize the anisotropies of the stochastic gravitational-wave background (SGWB). For this reason, we asked ourselves if a constellation of space-based instruments could be more suitable. We consider the Laser Interfer... |
1906.05668 | Abdolhosein Khodam-Mohammadi | Z. Molavi and A. Khodam-Mohammadi | Observational Tests of Gauss-Bonnet Like Dark Energy Model | 19 pages, 6 figures | Eur. Phys. J. Plus (2019) 134: 254 | 10.1140/epjp/i2019-12723-x | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The consistency of some dynamical dark energy models based on Gauss-Bonnet
invariant, ${\cal G}$, is studied compared with cosmological observational
tests. The investigated models are modified form of Gauss Bonnet dark energy,
MGB-DE and two other versions which are interacting MGB and $n_0$MGB. The
energy density o... | [
{
"created": "Tue, 11 Jun 2019 07:55:07 GMT",
"version": "v1"
}
] | 2019-06-14 | [
[
"Molavi",
"Z.",
""
],
[
"Khodam-Mohammadi",
"A.",
""
]
] | The consistency of some dynamical dark energy models based on Gauss-Bonnet invariant, ${\cal G}$, is studied compared with cosmological observational tests. The investigated models are modified form of Gauss Bonnet dark energy, MGB-DE and two other versions which are interacting MGB and $n_0$MGB. The energy density of ... |
2004.00822 | Naoki Tsukamoto | Naoki Tsukamoto | Nonlogarithmic divergence of a deflection angle by a marginally unstable
photon sphere of the Damour-Solodukhin wormhole in a strong deflection limit | 13 pages, 3 figures, typos corrected, accepted for publication in
Physical Review D | Phys. Rev. D 101, 104021 (2020) | 10.1103/PhysRevD.101.104021 | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | Static, spherically symmetric black holes and compact objects without an
event horizon have unstable (stable) circular orbits of a light called photon
(antiphoton) sphere. A Damour-Solodukhin wormhole has been suggested as a
simple black hole mimicker and the difference of its metric tensors from a
black hole is desc... | [
{
"created": "Thu, 2 Apr 2020 05:17:36 GMT",
"version": "v1"
},
{
"created": "Wed, 6 May 2020 16:28:47 GMT",
"version": "v2"
},
{
"created": "Sun, 25 Sep 2022 13:23:44 GMT",
"version": "v3"
}
] | 2022-09-27 | [
[
"Tsukamoto",
"Naoki",
""
]
] | Static, spherically symmetric black holes and compact objects without an event horizon have unstable (stable) circular orbits of a light called photon (antiphoton) sphere. A Damour-Solodukhin wormhole has been suggested as a simple black hole mimicker and the difference of its metric tensors from a black hole is descri... |
0710.4418 | Folkert Muller-Hoissen | Folkert Muller-Hoissen | Noncommutative Geometries and Gravity | 18 pages, to appear in the Proceedings of the Third Mexican Meeting
on Mathematical and Experimental Physics, Symposium on Gravitation and
Cosmology, Mexico City, 10-14 September 2007 | AIPConf.Proc.977:12-29,2008 | 10.1063/1.2902778 | null | gr-qc | null | We briefly review ideas about ``noncommutativity of space-time'' and
approaches toward a corresponding theory of gravity.
| [
{
"created": "Wed, 24 Oct 2007 09:50:57 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Muller-Hoissen",
"Folkert",
""
]
] | We briefly review ideas about ``noncommutativity of space-time'' and approaches toward a corresponding theory of gravity. |
2202.06125 | Zbigniew Haba | Z.Haba | Graviton noise:the Heisenberg picture | 15 pages | Int.Journ.Mod.Phys.D32,2350005(2023) | 10.1142/S0218271823500050 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the geodesic deviation equation for a quantum particle in a
linearized quantum gravitational field. Particle's Heisenberg equations of
motion are treated as stochastic equations with a quantum noise. We explore the
stochastic equation beyond its local approximation as a differential. We
discuss the squeezed ... | [
{
"created": "Sat, 12 Feb 2022 18:58:17 GMT",
"version": "v1"
},
{
"created": "Thu, 1 Sep 2022 20:17:13 GMT",
"version": "v2"
},
{
"created": "Wed, 1 Mar 2023 15:29:38 GMT",
"version": "v3"
}
] | 2023-03-02 | [
[
"Haba",
"Z.",
""
]
] | We study the geodesic deviation equation for a quantum particle in a linearized quantum gravitational field. Particle's Heisenberg equations of motion are treated as stochastic equations with a quantum noise. We explore the stochastic equation beyond its local approximation as a differential. We discuss the squeezed st... |
0905.3968 | Ken-Ichi Nakao | Ken-ichi Nakao, Tomohiro Harada, Yasunari Kurita, Yoshiyuki Morisawa | Relativistic Gravitational Collapse of a Cylindrical Shell of Dust II:
Settling Down Boundary Condition | 24 pages, 10 figures | Prog.Theor.Phys.122:521-541,2009 | 10.1143/PTP.122.521 | OCU-PHYS-306, AP-GR-63 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We numerically study the dynamics of an imploding hollow cylinder composed of
dust. Since there is no cylindrical black hole in 4-dimensional spacetime with
physically reasonable energy conditions, a collapsed dust cylinder involves a
naked singularity accompanied by its causal future, or a fatal singularity
which te... | [
{
"created": "Mon, 25 May 2009 08:50:37 GMT",
"version": "v1"
}
] | 2009-11-19 | [
[
"Nakao",
"Ken-ichi",
""
],
[
"Harada",
"Tomohiro",
""
],
[
"Kurita",
"Yasunari",
""
],
[
"Morisawa",
"Yoshiyuki",
""
]
] | We numerically study the dynamics of an imploding hollow cylinder composed of dust. Since there is no cylindrical black hole in 4-dimensional spacetime with physically reasonable energy conditions, a collapsed dust cylinder involves a naked singularity accompanied by its causal future, or a fatal singularity which term... |
2403.19383 | Maciej Ossowski | Jerzy Lewandowski, Maciej Ossowski | Vacuum Petrov type D horizons of non-trivial $U(1)$ bundle structure
over Riemann surfaces with genus $> 0$ | 24 pages, minor typos corrected, version published in PRD | Phys. Rev. D 110, 024071 (2024) | 10.1103/PhysRevD.110.024071 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider isolated horizons (Killing horizons up to the second order) whose
null flow has the structure of a U(1) principal fiber bundle over a compact
Riemann surface. We impose the vacuum Einstein equations (with the cosmological
constant) and the condition that the spacetime Weyl tensor is of Petrov D type
on th... | [
{
"created": "Thu, 28 Mar 2024 12:45:34 GMT",
"version": "v1"
},
{
"created": "Thu, 15 Aug 2024 10:25:49 GMT",
"version": "v2"
}
] | 2024-08-16 | [
[
"Lewandowski",
"Jerzy",
""
],
[
"Ossowski",
"Maciej",
""
]
] | We consider isolated horizons (Killing horizons up to the second order) whose null flow has the structure of a U(1) principal fiber bundle over a compact Riemann surface. We impose the vacuum Einstein equations (with the cosmological constant) and the condition that the spacetime Weyl tensor is of Petrov D type on the ... |
2009.01125 | Simone Speziale | Andrea Calcinari, Laurent Freidel, Etera Livine and Simone Speziale | Twisted Geometries Coherent States for Loop Quantum Gravity | 21 pages + Appendices. Various color figures. v2: minor corrections,
matches published version | null | 10.1088/1361-6382/abc273 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We introduce a new family of coherent states for loop quantum gravity,
inspired by the twisted geometry parametrization. We compute their peakedness
properties and compare them with the heat-kernel coherent states. They show
similar features for the area and the holonomy operators, but improved
peakedness in the dire... | [
{
"created": "Wed, 2 Sep 2020 15:04:30 GMT",
"version": "v1"
},
{
"created": "Mon, 19 Oct 2020 18:59:52 GMT",
"version": "v2"
}
] | 2021-02-03 | [
[
"Calcinari",
"Andrea",
""
],
[
"Freidel",
"Laurent",
""
],
[
"Livine",
"Etera",
""
],
[
"Speziale",
"Simone",
""
]
] | We introduce a new family of coherent states for loop quantum gravity, inspired by the twisted geometry parametrization. We compute their peakedness properties and compare them with the heat-kernel coherent states. They show similar features for the area and the holonomy operators, but improved peakedness in the direct... |
1711.01067 | Mohammad Vahid Takook | M.V. Takook | Quantum de Sitter-black hole in ambient space formalism | 11 pages, Lecture presented at 5th Workshop and Seminar on Topics in
Theoretical Physics, Azarbaijan Shahid Madani University, IRAN, 23-25 August
(2017) | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Two important problems in studying the quantum black hole, namely the
construction of the Hilbert space and the definition of the time evolution
operator on such Hilbert space, are discussed using the de Sitter background
field method for an observer far from the black hole. This is achieved through
the ambient space... | [
{
"created": "Fri, 3 Nov 2017 09:05:13 GMT",
"version": "v1"
}
] | 2017-11-06 | [
[
"Takook",
"M. V.",
""
]
] | Two important problems in studying the quantum black hole, namely the construction of the Hilbert space and the definition of the time evolution operator on such Hilbert space, are discussed using the de Sitter background field method for an observer far from the black hole. This is achieved through the ambient space f... |
gr-qc/0012089 | Niall O. Murchadha | Julian Barbour (College Farm), Brendan Foster (UMD), Niall \'O
Murchadha (UCC) | Relativity without relativity | minor revisions, accepted for publication by Classical and Quantum
Gravity | Class.Quant.Grav. 19 (2002) 3217-3248 | 10.1088/0264-9381/19/12/308 | null | gr-qc | null | We give a derivation of general relativity and the gauge principle that is
novel in presupposing neither spacetime nor the relativity principle. We
consider a class of actions defined on superspace with two key properties. The
first is 3-coordinate invariance. This is the only postulated symmetry, and it
leads to the... | [
{
"created": "Thu, 21 Dec 2000 18:06:57 GMT",
"version": "v1"
},
{
"created": "Tue, 2 Apr 2002 14:49:54 GMT",
"version": "v2"
},
{
"created": "Thu, 9 May 2002 20:08:05 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Barbour",
"Julian",
"",
"College Farm"
],
[
"Foster",
"Brendan",
"",
"UMD"
],
[
"Murchadha",
"Niall Ó",
"",
"UCC"
]
] | We give a derivation of general relativity and the gauge principle that is novel in presupposing neither spacetime nor the relativity principle. We consider a class of actions defined on superspace with two key properties. The first is 3-coordinate invariance. This is the only postulated symmetry, and it leads to the s... |
1111.4927 | Christian Corda cordac | C. Corda, D. Leiter, H. J. Mosquera Cuesta, S. Robertson, R. E. Schild | Farewell to black hole horizons and singularities? | Invited review, 11 pages. Paper dedicated to the Memory of Professor
Darryl Jay Leiter, February 25, 1937 - March 4, 2011 | Journal of Cosmology, 17, 13 (2011) | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the fundamental issues which dominate the question about the
existence or non-existence of black hole horizons and singularities from both
of the theoretical and observational points of view, and discuss some of the
ways that black hole singularities can be prevented from forming at a classical
level, i.e... | [
{
"created": "Mon, 21 Nov 2011 16:51:44 GMT",
"version": "v1"
},
{
"created": "Tue, 22 Nov 2011 09:00:22 GMT",
"version": "v2"
},
{
"created": "Wed, 23 Nov 2011 06:45:10 GMT",
"version": "v3"
},
{
"created": "Wed, 30 Nov 2011 08:40:45 GMT",
"version": "v4"
}
] | 2011-12-01 | [
[
"Corda",
"C.",
""
],
[
"Leiter",
"D.",
""
],
[
"Cuesta",
"H. J. Mosquera",
""
],
[
"Robertson",
"S.",
""
],
[
"Schild",
"R. E.",
""
]
] | We consider the fundamental issues which dominate the question about the existence or non-existence of black hole horizons and singularities from both of the theoretical and observational points of view, and discuss some of the ways that black hole singularities can be prevented from forming at a classical level, i.e. ... |
2007.10579 | Vladimir Folomeev | Vladimir Dzhunushaliev and Vladimir Folomeev | On the linear stability of polytropic fluid spheres in $R^2$ gravity | 8 pages, 2 figures, some corrections to content, new reference added,
version published in IJGMMP | International Journal of Geometric Methods in Modern Physics,
2050165 (2020) | 10.1142/S0219887820501650 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Within $R^2$ gravity, we study the linear stability of strongly gravitating
spherically symmetric configurations supported by a polytropic fluid. All
calculations are carried out in the Jordan frame. It is demonstrated that, as
in general relativity, the transition from stable to unstable systems occurs at
the maximu... | [
{
"created": "Tue, 21 Jul 2020 03:38:31 GMT",
"version": "v1"
},
{
"created": "Sat, 26 Sep 2020 06:38:50 GMT",
"version": "v2"
}
] | 2020-09-29 | [
[
"Dzhunushaliev",
"Vladimir",
""
],
[
"Folomeev",
"Vladimir",
""
]
] | Within $R^2$ gravity, we study the linear stability of strongly gravitating spherically symmetric configurations supported by a polytropic fluid. All calculations are carried out in the Jordan frame. It is demonstrated that, as in general relativity, the transition from stable to unstable systems occurs at the maximum ... |
2406.10343 | Alexander Grant | Alexander M. Grant | Flux-balance laws for spinning bodies under the gravitational self-force | 22 pages, 1 figure | null | null | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The motion of an extended, but still weakly gravitating body in general
relativity can often be determined by a set of conserved quantities. If they
are sufficient in number, this allows for a complete solution to the equations
of motion, much like for geodesic motion. Under the gravitational self-force
(relaxing the... | [
{
"created": "Fri, 14 Jun 2024 18:00:05 GMT",
"version": "v1"
}
] | 2024-06-18 | [
[
"Grant",
"Alexander M.",
""
]
] | The motion of an extended, but still weakly gravitating body in general relativity can often be determined by a set of conserved quantities. If they are sufficient in number, this allows for a complete solution to the equations of motion, much like for geodesic motion. Under the gravitational self-force (relaxing the "... |
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